Camera module and driving mechanism applied to camera module

Abstract

The present application relates to the technical field of electronics, and discloses a camera module and a driving mechanism applied to the camera module. The driving mechanism comprises: a fixed member, a movable member, a driving assembly, a guide assembly, and a magnetic attraction assembly; the fixed member comprises a supporting surface; the movable member is movably connected to the fixed member and comprises a contact surface; the driving assembly is disposed between the fixed member and the movable member and provides a pre-pressure; the guide assembly is located between the supporting surface and the contact surface, so that a fixed gap is kept between the fixed member and the movable member; the magnetic attraction assembly comprises at least one group of first magnetic attraction members and second magnetic attraction members which are respectively disposed on the fixed member and the movable member, and the first magnetic attraction members and the second magnetic attraction members cooperate to generate a magnetic attraction force parallel to the pre-pressure, such that the contact surface is magnetically attached to the supporting surface. The camera module applies the driving mechanism, so that the movable member can be prevented from inclining relative to the fixed member, thereby preventing the movable member from being stuck relative to the fixed member, and the movable member can be smoothly adjusted, so that the imaging quality can be improved.

Description

Camera module and driving mechanism used in camera module Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a camera module and a driving mechanism applied to the camera module. Background Art

[0002] Currently, electronic devices are often equipped with camera modules. With rising living standards, people are increasingly prioritizing camera stabilization, hoping to obtain higher-quality photos. As user demand for video increases, the functional diversity and performance requirements of camera modules used in mobile phones, tablets, and other terminal devices are also increasing. To achieve various camera functions, such as focusing and stabilization, camera modules are typically equipped with a motor to drive the entire optical lens or a portion of the optical lens to achieve at least one of these functions.

[0003] However, as the demand for performance increases, the size of optical lenses or photosensitive devices also increases, and therefore, the demand for motor performance also increases. A piezoelectric motor is a motor with fast response, large driving force, and high driving precision. The use of a piezoelectric motor can significantly improve the performance of the camera module. In the prior art, the optical lens is set on a movable carrier, and the movable carrier is movably set on a fixed frame, and a piezoelectric motor is installed between the two. On the one hand, the piezoelectric motor provides pre-pressure to the movable carrier so that it abuts against the movable carrier, and on the other hand, it can drive the movable carrier to move relative to the fixed frame through friction, thereby realizing the lens adjustment function. However, due to the existence of this pre-pressure, the movable carrier may tilt relative to the fixed frame, causing the movable carrier to be stuck in a certain position, losing the lens adjustment function, and resulting in reduced imaging quality of the camera module.

[0004] As user demand for stabilization increases, camera stabilization performance is increasingly important in image capture. Users expect high-pixel, compact camera modules with stabilization capabilities. However, generally speaking, as the image area increases, the number of camera module pixels increases. This also increases the total track length (TTL) of the optical components. This increases the size of the optical components or photosensitive devices, increasing the travel and driving force requirements of the corresponding motors. This increase in motor size also increases the size of the camera module.

[0005] A piezoelectric motor is a motor with fast response, strong driving force and high driving precision. The use of a piezoelectric motor can significantly improve the performance of the camera module. This application provides a new piezoelectric motor solution to improve the shooting effect.

[0006] Summary of the Invention

[0007] One purpose of the present application is to provide a driving mechanism for a camera module, which can prevent the movable part from tilting relative to the fixed part, thereby preventing the movable part from getting stuck relative to the fixed part.

[0008] Another object of the present application is to provide a camera module, in which the movable parts equipped with optical lenses can be adjusted smoothly, which is beneficial to improving imaging quality.

[0009] One purpose of the present application is to provide a driving mechanism for a camera module, which can prevent a movable carrier from tilting relative to a fixed frame, thereby preventing the movable carrier from getting stuck relative to the fixed frame.

[0010] Another object of the present application is to provide a camera module, which is conducive to improving imaging quality because the movable carrier equipped with an optical lens can be smoothly adjusted.

[0011] One purpose of the present application is to provide a piezoelectric motor, which prevents the actuating component from tilting relative to the movable part by improving the pre-stressing component, thereby improving the driving effect of the piezoelectric motor.

[0012] Another purpose of this application is to provide a camera module to improve the shooting effect.

[0013] Another object of the present application is to provide a piezoelectric motor assembly process to improve the consistency of the preload provided by the preload assembly in multiple piezoelectric motors in the same batch.

[0014] One purpose of the present application is to provide a piezoelectric motor that reduces the risk of a movable carrier tilting relative to a fixed frame and avoids jamming of a support assembly.

[0015] Another object of the present application is to provide a camera module to achieve smooth adjustment of a movable carrier equipped with an optical lens and improve the photographic effect.

[0016] One purpose of the present application is to provide a driving device for a camera module, so as to reduce the risk of a movable carrier tilting relative to a fixed frame and avoid the movable carrier and a supporting assembly from getting stuck.

[0017] Another object of the present application is to provide a camera module, which is conducive to improving imaging quality because the movable carrier equipped with the lens assembly can be smoothly adjusted.

[0018] To achieve one of the objectives of this application, the technical solution adopted in this application is: a driving mechanism applied to a camera module, comprising:

[0019] a fixing member, the fixing member including a support surface;

[0020] a movable member, the movable member being movably disposed on the fixed member, the movable member comprising a contact surface disposed opposite to the supporting surface;

[0021] a guide assembly, the guide assembly being located between the support surface and the contact surface so as to maintain a fixed gap between the fixed member and the movable member;

[0022] A driving assembly connected to the fixed member and abutting against the movable member to provide a pre-pressure;

[0023] A magnetic attraction component, the magnetic attraction component includes at least one group of a first magnetic attraction component and a second magnetic attraction component, the first magnetic attraction component is arranged on one of the fixed component and the movable component, and the second magnetic attraction component is arranged on the other of the fixed component and the movable component, the first magnetic attraction component interacts with the second magnetic attraction component to adsorb the contact surface of the movable component to the support surface of the fixed component, and the direction of the magnetic attraction force generated by the magnetic attraction component is parallel to the pre-pressure direction of the driving component.

[0024] As a preference, the guide assembly and the drive assembly are arranged on the same side of the movable part.

[0025] Preferably, the guide assembly includes a first guide member and a second guide member, and the first guide member and the second guide member are both arranged adjacent to the drive assembly.

[0026] As a preference, the guide assembly, the drive assembly and the magnetic assembly are all arranged on the same side of the movable part.

[0027] As a preference, the magnetic attraction component includes a first group of magnetic attraction components and a second group of magnetic attraction components arranged relative to the driving component, and the first group of magnetic attraction components and the second group of magnetic attraction components are respectively arranged on both sides of the driving component.

[0028] As a preference, along a direction parallel to the pre-pressure, the first magnetic member and the second magnetic member in the first group of magnetic components are respectively arranged on both sides of the first guide member, and the first magnetic member and the second magnetic member in the second group of magnetic components are respectively arranged on both sides of the second guide member, the first magnetic member and the second magnetic member of the first group of magnetic components attract each other, and the first magnetic member and the second magnetic member in the second group of magnetic components attract each other.

[0029] As a preference, the driving assembly includes a pre-stressing assembly and an actuating assembly, the pre-stressing assembly is connected to the fixing member, and the actuating assembly is connected to the pre-stressing assembly, the pre-stressing assembly provides the pre-stressing force to the actuating assembly, so that the friction head of the actuating assembly abuts against one side of the movable member and applies the pre-stressing force to the movable member, the pre-stressing force is in the same direction as the magnetic attraction force, and when the actuating assembly receives a driving signal, the friction head provides driving force to the movable member to drive the movable member to move.

[0030] Preferably, a plane passing through the center line of the pre-stressing component and extending along the pre-stressing direction is used as a reference plane, and the first group of magnetic components and the second group of magnetic components are symmetrically arranged with respect to the reference plane.

[0031] Preferably, the pre-stressing assembly includes a structural part and a buffer part, the elastic modulus of the structural part is greater than the elastic modulus of the buffer part, the fixing part is provided with an opening extending from the outer wall of the fixing part to the inner wall thereof, the structural part is connected to the outer wall of the fixing part, one side of the buffer part is attached to the structural part, and the other side is attached to the actuating assembly, the buffer part and the actuating assembly thereon pass through the opening and abut against the movable part.

[0032] As a preference, along the moving direction of the movable part, the length of the first magnetic part is L, the length of the second magnetic part is Y, and the travel range of the movable part under the drive of the driving assembly is D, Y>L+D, or L>Y+D.

[0033] As a preference, it further comprises a magnetic induction component, which is arranged relative to the magnetic attraction component, so as to determine the position of the movable part by inducing changes in the magnetic field.

[0034] As a preference, the movable part is provided with an outer convex portion, which is formed by protruding from the outer side wall of the movable part in a direction away from the driving component, and the fixed part is provided with an inner convex portion, which is formed by protruding from the inner side wall of the fixed part in a direction close to the driving component. The inner convex portion is arranged opposite to the outer convex portion, the contact surface is formed on the outer convex portion, and the support surface is formed on the inner convex portion.

[0035] As a preference, the movable part is further provided with an inner recessed portion, which is formed by being recessed from the outer side wall of the movable part in a direction close to the driving component, and the outer convex portion is connected to the inner recessed portion and cooperates to form a first groove, and the inner convex portion is suitable for being inserted into the first groove, and the fixed part is provided with an outer recessed portion, which is recessed from the inner side wall of the fixed part in a direction away from the driving component, and the outer recessed portion is connected to the inner convex portion and cooperates to form a second groove, and the outer convex portion is suitable for being inserted into the second groove.

[0036] As a preference, a first guide groove and a third guide groove are provided on the support surface, and a corresponding second guide groove and a fourth guide groove are provided on the contact surface. The first guide groove and the second guide groove cooperate to clamp the first guide member therein, and the third guide groove and the fourth guide groove cooperate to clamp the second guide member therein. The first guide member and the second guide member keep the support surface and the contact surface parallel.

[0037] To achieve another purpose of this application, the technical solution adopted in this application is: a camera module, which includes:

[0038] Optical lens;

[0039] A photosensitive component arranged relative to the optical lens; and

[0040] In the above-mentioned driving mechanism, the optical lens is arranged on the movable part.

[0041] Compared with the prior art, the present invention has the following advantages:

[0042] (1) The magnetic attraction of the magnetic assembly causes the contact surface of the movable part to have a tendency to move toward the support surface of the fixed part, so that the contact surface and the support surface can cooperate to clamp the guide assembly, and the clamping is stable and reliable, achieving a tight assembly between the fixed part, the movable part, and the guide assembly;

[0043] (2) When the movable part tilts under the action of the preload and driving force of the driving assembly, the magnetic attraction can act on the movable part so that the position of the movable part is corrected in time, thereby maintaining the parallelism between the supporting surface and the contact surface. That is, the movable part is prevented from tilting when moving along the optical axis, and the movable part can move smoothly along the optical axis. The movable part equipped with the optical lens can smoothly adjust its position, which is conducive to improving the imaging quality.

[0044] (3) The magnetic component has a simple structure and low cost;

[0045] (4) The magnetic attraction and preload are in the same direction, which can simultaneously support the movable part in parallel to the fixed part;

[0046] (5) Adding a guide component to reduce the friction contact area between the movable part and the fixed part helps to reduce the friction force when the movable part moves relative to the fixed part, making it easier for the movable part to be driven.

[0047] To achieve one of the objectives of this application, the technical solution adopted in this application is: a driving mechanism applied to a camera module, comprising:

[0048] a fixed frame, the fixed frame comprising a support surface;

[0049] a movable carrier, the movable carrier being movably disposed on the fixed frame, the movable carrier comprising a contact surface disposed opposite to the supporting surface;

[0050] a guide assembly, the guide assembly being located between the support surface and the contact surface so as to maintain a first gap between the support surface and the contact surface;

[0051] a driving assembly connected to the fixed frame, abutting against the movable carrier and applying a pre-pressure to the movable carrier, wherein the pre-pressure causes the contact surface to tend to move away from the supporting surface;

[0052] At least one group of magnetic components, the magnetic components including a first magnetic component and a second magnetic component, the first magnetic component being arranged on the fixed frame, the second magnetic component being arranged on the movable carrier, the first magnetic component and the second magnetic component interacting with each other to apply a magnetic force to the movable carrier, the direction of the magnetic force being opposite to the direction of the pre-pressure, and the magnetic force being greater than the pre-pressure, so as to adsorb the contact surface of the movable carrier to the support surface of the fixed frame, and the guide component being clamped between the support surface and the contact surface.

[0053] Preferably, the fixed frame has a first frame side, the movable carrier has a first carrier side, the first frame side is arranged opposite to the first carrier side, the inner surface of the first frame side forms the support surface, the outer surface of the first carrier side forms the contact surface, and the guide assembly and the drive assembly are both arranged between the first frame side and the first carrier side.

[0054] As a preference, the driving assembly includes a pre-stressing assembly and an actuating assembly, the pre-stressing assembly is connected to the fixed frame, the actuating assembly is connected to the pre-stressing assembly, the pre-stressing assembly provides the pre-stressing assembly to the actuating assembly, so that the friction head of the actuating assembly abuts against the outer surface of the side of the first carrier, and the pre-stressing assembly acts on the movable carrier.

[0055] Preferably, the guide assembly includes a first guide member and a second guide member, and the first guide member and the second guide member are respectively arranged on both sides of the driving assembly.

[0056] As a preference, the first magnetic member is arranged on the side of the first frame, and the second magnetic member is arranged on the side of the first carrier.

[0057] As a preference, the magnetic attraction component includes a first group of magnetic attraction components and a second group of magnetic attraction components arranged relative to the driving component, and the first group of magnetic attraction components and the second group of magnetic attraction components are respectively arranged on both sides of the driving component.

[0058] Preferably, the first group of magnetic components is arranged on a side of the first guide member away from the driving component, and the second group of magnetic components is arranged on a side of the second guide member away from the driving component.

[0059] As a preference, the first group of magnetic components is arranged between the first guide member and the driving component, and the second group of magnetic components is arranged between the second guide member and the driving component.

[0060] Preferably, the first group of magnetic components and the second group of magnetic components are symmetrically arranged about the central axis of the driving component, and the magnetic attraction force generated by the first group of magnetic components is equal to the magnetic attraction force generated by the second group of magnetic components.

[0061] As a preference, the magnetic components are provided as a group, and along the pre-pressure direction, the first magnetic component and the second magnetic component in the group of magnetic components are respectively provided on both sides of the driving component.

[0062] As a preferred embodiment, the driving assembly includes a pre-stressing assembly and an actuating assembly, the pre-stressing assembly is connected to the fixed frame, and the actuating assembly is connected to the pre-stressing assembly, the pre-stressing assembly provides the pre-stressing pressure to the actuating assembly, so that the friction head of the actuating assembly abuts against the outer surface of the side of the first carrier, and the pre-stressing pressure is applied to the movable carrier, the pre-stressing assembly forms the first magnetic attraction part, and the middle part of the second magnetic attraction part is arranged opposite to the friction head.

[0063] As a preference, the first magnetic member and the second magnetic member are arranged parallel to each other, and both are extended along the moving direction of the movable carrier, so that the magnetic attraction force is perpendicular to the moving direction of the movable carrier.

[0064] Preferably, along the moving direction of the movable carrier, the length of the first magnetic member is L, the length of the second magnetic member is Y, the travel range of the movable carrier driven by the driving assembly is D, and L≥Y+D.

[0065] As a preference, the fixed frame includes a second frame side portion and a fourth frame side portion respectively arranged at both ends of the first frame side portion, the inner surfaces of the second frame side portion and the inner surfaces of the fourth frame side portion respectively protrude inward to form inner convex portions, and the movable carrier includes a second carrier side portion and a fourth carrier side portion respectively arranged at both ends of the first carrier side portion, the outer surfaces of the second carrier side portion and the outer surfaces of the fourth carrier side portion respectively protrude outward to form outer convex portions, the outer convex portions are located between the inner convex portions and the supporting surface, and a second gap is provided between the side of the outer convex portion facing away from the contact surface and the side of the inner convex portion facing the supporting surface, and the width of the second gap is smaller than the width of other gaps between the movable carrier and the fixed frame.

[0066] Preferably, the first magnetic attraction member and / or the second magnetic attraction member is a magnet, and the driving mechanism further includes a magnetic induction member, which is arranged relative to at least one of the magnets, so as to determine the position of the movable carrier by inducing changes in the magnetic field.

[0067] To achieve another purpose of this application, the technical solution adopted in this application is: a camera module, which includes:

[0068] Optical lens;

[0069] A photosensitive component arranged relative to the optical lens; and

[0070] In the above-mentioned driving mechanism, the optical lens is arranged on the movable carrier.

[0071] Compared with the prior art, the present invention has the following advantages:

[0072] (1) The magnetic attraction of the magnetic assembly causes the contact surface of the movable carrier to have a tendency to move toward the support surface of the fixed frame, so that the contact surface and the support surface can cooperate to clamp the guide assembly, and the clamping is stable and reliable, achieving a tight assembly between the fixed frame, the movable carrier, and the guide assembly;

[0073] (2) The magnetic attraction is in the opposite direction to the preload and is greater than the preload. The magnetic attraction enables the movable carrier to be supported parallel to the fixed frame through the guide assembly. Even when the preload is tilted, the magnetic attraction can completely offset the component of the preload that is not perpendicular to the contact surface between the friction head and the movable carrier, thus keeping the opposite surfaces of the movable carrier and the fixed frame parallel to each other.

[0074] (3) When the movable carrier tilts under the preload and driving force of the driving assembly, the magnetic attraction can act on the movable carrier so that the position of the movable carrier is corrected in time, thereby maintaining the parallelism between the supporting surface and the contact surface. That is, the movable carrier is prevented from tilting when moving along the optical axis, and the movable carrier can move smoothly along the optical axis. The movable carrier equipped with the optical lens can smoothly adjust its position, which is conducive to improving the imaging quality.

[0075] (4) The magnetic component has a simple structure and low cost;

[0076] (5) The setting of the guide assembly enables a first gap to be maintained between the support surface and the contact surface, which can reduce the friction contact area between the movable carrier and the fixed frame, thereby reducing the friction force on the movable carrier when it moves relative to the fixed frame, and making it easier for the movable carrier to be driven.

[0077] To achieve one of the objectives of this application, the technical solution adopted in this application is: a piezoelectric motor applied to a camera module, comprising:

[0078] fixings;

[0079] a movable member, the movable member being movably connected to the fixed member;

[0080] A drive assembly, the drive assembly includes a pre-stressing assembly and an actuating assembly, the pre-stressing assembly includes a buffer and a structural member, the structural member is connected to the fixed member, the buffer is arranged between the structural member and the actuating assembly, and is suitable for being deformed by the squeezing of the structural member and the actuating assembly, the pre-stressing assembly applies a pre-pressure to the actuating assembly so that the actuating assembly abuts against the movable member, so that the actuating assembly is suitable for driving the movable member to move relative to the fixed member when receiving a drive signal.

[0081] Preferably, the structural member includes a first mounting surface facing the buffer member, the buffer member includes a second mounting surface opposite to the first mounting surface, and a third mounting surface arranged opposite to the second mounting surface, the first mounting surface is fitted with the second mounting surface, the actuator assembly includes a piezoelectric vibrator and a friction head, the piezoelectric vibrator is fitted with the third mounting surface, the side of the piezoelectric vibrator facing away from the third mounting surface is connected to the friction head, and the friction head abuts against the movable member.

[0082] As a preferred embodiment, the structural member includes a first mounting surface facing the buffer member, the buffer member includes a second mounting surface opposite to the first mounting surface, and a third mounting surface opposite to and parallel to the second mounting surface, the first mounting surface is in contact with the second mounting surface, the actuator assembly includes a flexible circuit board, a piezoelectric vibrator and a friction head, the two opposite surfaces of the flexible circuit board are respectively in contact with the third mounting surface and the piezoelectric vibrator, the side of the piezoelectric vibrator facing away from the third mounting surface is connected to the friction head, and the friction head is in contact with the movable member.

[0083] As a preference, the movable part is arranged in the fixed part, and the fixed part is provided with an opening that passes through the inner and outer sides of the fixed part. The structural part is arranged on the outside of the fixed part, and the size of the structural part in at least one direction is larger than the size of the opening. The buffer part and the actuating assembly pass through the opening, so that the actuating assembly can abut against the movable part.

[0084] Preferably, there is a gap between a surface of the structural member facing the buffer member and an outer side surface of the fixing member.

[0085] Preferably, the structural member is connected to the fixing member via an adhesive, and the adhesive covers at least a portion of a circumference of the structural member.

[0086] As a preference, the elastic coefficient of the structural member is greater than or equal to 1.2*10^5 N / m; the thickness of the structural member is greater than or equal to 150 μm.

[0087] As a preference, the elastic modulus of the buffer component is greater than or equal to 100 KPa and less than or equal to 100 MPa; the thickness of the buffer component is greater than or equal to 50 μm and less than or equal to 800 μm.

[0088] As a preference, the buffer member is an adhesive tape, and two opposite surfaces of the buffer member are respectively bonded to the structural member and the actuating assembly.

[0089] As a preferred embodiment, the piezoelectric motor includes:

[0090] base;

[0091] a first frame movably connected to the base and adapted to move relative to the base in a first direction, wherein a first driving mechanism is provided between the first frame and the base;

[0092] a second frame, movably connected to the first frame and adapted to move relative to the first frame in a second direction, wherein a second driving mechanism is provided between the second frame and the first frame;

[0093] a third frame, movably connected to the second frame and adapted to move relative to the second frame along a third direction, a third driving mechanism being provided between the third frame and the second frame;

[0094] Wherein, at least one of the first driving mechanism, the second driving mechanism, and the third driving mechanism is the driving assembly, and when the first driving mechanism is the driving assembly, the base is a fixed part and the first frame is a movable part; when the second driving mechanism is the driving assembly, the first frame is a fixed part and the second frame is a movable part; when the third driving mechanism is the driving assembly, the second frame is a fixed part and the third frame is a movable part.

[0095] To achieve another purpose of this application, the technical solution adopted in this application is: a camera module, which includes:

[0096] The piezoelectric motor mentioned above;

[0097] a lens assembly, disposed in the piezoelectric motor;

[0098] The photosensitive component is arranged relative to the lens component.

[0099] To achieve another object of the present application, the technical solution adopted in the present application is: an assembly process of a piezoelectric motor, which includes the following steps:

[0100] S1. Provide a fixed member, a movable member, and a driving assembly, wherein the driving assembly includes a pre-pressing assembly and an actuating assembly, and the pre-pressing assembly includes a buffer member and a structural member;

[0101] S2, installing the movable part into the fixed part;

[0102] S3, placing the buffer member between the structural member and the actuating assembly to form a combination;

[0103] S4, extending the buffer member and the actuating assembly in the assembly into the opening on the fixing member, with the structural member remaining outside the opening;

[0104] S5. Applying pressure to the structural member to bring the structural member closer to the movable member, so that the actuating assembly abuts against the movable member, and the buffer member is squeezed and deformed by the structural member and the actuating assembly;

[0105] S6, fixing the structural member on the fixing member, and during the fixing process, continuously applying the pressure provided in step S5 to the structural member, and removing the pressure after the structural member is fixed;

[0106] Among them, S2 and S3 are in no particular order.

[0107] As a preference, step S5 further includes the steps of: obtaining a value of the pressure applied to the structural member through a pressure sensor, and adjusting the magnitude of the pressure until it is the same as a preset value.

[0108] Preferably, in step S6, fixing the structural member on the fixing member specifically includes the steps of: applying glue on the circumference of the structural member and bringing the glue into contact with the fixing member, continuously applying the pressure provided in step S5 to the structural member, and completing the fixing of the structural member after the glue is cured, and removing the pressure.

[0109] Compared with the prior art, the present invention has the following advantages:

[0110] (1) In the prior art, the pre-stressing assembly will deform and bend, causing the actuating assembly to tilt relative to the movable part, and then the actuating assembly drives the movable part to move at inconsistent speeds in two opposite directions relative to the fixed part, affecting the driving effect of the piezoelectric motor. The present application improves the structure of the pre-stressing assembly, and the structural parts will not be significantly deformed under the action of the pre-stressing force, which can prevent the actuating assembly from tilting relative to the movable part, thereby improving the driving effect of the piezoelectric motor and thus improving the shooting effect of the camera module;

[0111] (2) Since the buffer member is deformable, the buffer member is disposed between the structural member and the actuator assembly. When the piezoelectric motor is assembled, the deformation of the buffer member can offset at least part of the preload change caused by material tolerance and assembly tolerance.

[0112] (3) The present application also provides an assembly process for a piezoelectric motor. By improving the structure of the pre-stressing assembly and utilizing the deformation characteristics of the buffer, the compression degree of the buffer in multiple piezoelectric motors in the same batch can be adaptively adjusted, thereby improving the consistency of the pre-stress in multiple piezoelectric motors in the same batch.

[0113] (4) In the prior art, a spring is generally used as a pre-stressing component, and the spring is connected to the actuating component through an adhesive such as UV glue or thermosetting glue. Since the elastic modulus of the adhesive is large after curing, the piezoelectric vibrator in the actuating component and the spring form a rigid whole, which will affect the vibration mode of the piezoelectric vibrator and thus affect the driving effect. The buffer member of the present application can absorb part of the deformation of the piezoelectric vibrator, which is conducive to maintaining the setting angle of the piezoelectric vibrator relative to the movable part, so that the actual motion state of the piezoelectric vibrator is close to the design value, and reduce the influence of the external environment, such as the deformation of the pre-stressing component, on the movement of the piezoelectric vibrator;

[0114] (5) Furthermore, the buffer member can be attached between the actuator assembly and the structural member, which not only facilitates assembly but also avoids the problem of affecting the vibration mode of the piezoelectric vibrator caused by using adhesives such as UV glue or thermosetting glue to bond the spring piece in the prior art.

[0115] To achieve one of the objectives of this application, the technical solution adopted in this application is: a piezoelectric motor applied to a camera module, comprising:

[0116] Fixed frame;

[0117] a movable carrier, the movable carrier being movably arranged on the fixed frame;

[0118] a driving assembly connected to the fixed frame and abutting against the movable carrier;

[0119] A support assembly is arranged between the fixed frame and the movable carrier, and the support assembly cooperates with the driving assembly to support the movable carrier on the fixed frame; and the driving assembly and the support assembly are arranged on the same side of the piezoelectric motor.

[0120] Preferably, the supporting assembly is a guide rod, and the movable carrier is provided with at least two protrusions suitable for contacting the guide rod, and the at least two protrusions are spaced apart in a direction parallel to the length direction of the guide rod.

[0121] As a preference, the movable carrier is provided with two protrusions, and the two protrusions are located at both ends of the movable carrier, and the middle portion of the movable carrier is relatively recessed to be separated from the middle portion of the supporting assembly.

[0122] Preferably, the support assembly includes a first support member and a second support member, and the first support member and the second support member are respectively located on both sides of the driving assembly.

[0123] Preferably, the first support member and the second support member are symmetrically arranged on both sides of the driving assembly.

[0124] As a preference, the fixed frame has a first frame side, the movable carrier has a first carrier side, the first frame side is arranged opposite to the first carrier side, the driving assembly is arranged between the first frame side and the first frame side, the fixed frame is provided with a first inner convex portion and a second inner convex portion protruding toward the movable carrier, and the two ends of the first carrier side are provided with a first outer convex portion and a second outer convex portion protruding toward the fixed frame, the first outer convex portion is located between the first frame side and the first inner convex portion, the second outer convex portion is located between the first frame side and the second inner convex portion, the first support member is located between the first outer convex portion and the first inner convex portion, and the second support member is located between the second outer convex portion and the second inner convex portion.

[0125] Preferably, a first guide groove is provided on the first inner convex portion, and a second guide groove is provided on the first outer convex portion. The first guide groove and the second guide groove are arranged opposite to each other and cooperate to form a first channel extending along the first direction. The first support member is arranged in the first channel to guide the movement direction of the movable carrier; a first support portion is provided on the second inner convex portion, and a second support portion is provided on the second outer convex portion. The first support portion and the second support portion are arranged opposite to each other and cooperate to form a second channel extending along the first direction. The second support member is arranged in the second channel.

[0126] Preferably, at least one of the first supporting portion and the second supporting portion is provided with a supporting plane adapted to contact the second supporting member, and the second supporting member is adapted to adjust its position perpendicular to the first direction along the supporting plane.

[0127] Preferably, the first support member is disposed in the first channel and is adapted to move along a first direction, and the second support member is disposed in the second channel and is adapted to move at least along the first direction.

[0128] As a preference, the driving assembly includes a pre-stressing assembly and an actuating assembly, the pre-stressing assembly is connected to the fixed frame, and the actuating assembly is connected to the pre-stressing assembly, the pre-stressing assembly provides pre-stress to the actuating assembly, so that the driving end of the actuating assembly abuts against the movable carrier and applies the pre-stress to the movable carrier, so that the actuating assembly is suitable for driving the movable carrier to move relative to the fixed frame when receiving a driving signal.

[0129] Preferably, the pre-stressing assembly includes a structural member and a buffer member, the structural member is connected to the fixed frame, the buffer member is arranged between the structural member and the actuating assembly, and is suitable for being deformed by being squeezed by the structural member and the actuating assembly.

[0130] To achieve another purpose of this application, the technical solution adopted in this application is: a camera module, which includes:

[0131] The piezoelectric motor mentioned above;

[0132] a lens assembly disposed in the piezoelectric motor; and

[0133] The photosensitive component is arranged relative to the lens component.

[0134] Compared with the prior art, the present invention has the following advantages:

[0135] (1) The support assembly and the drive assembly are arranged on the same side of the piezoelectric motor, so that the distance from the support assembly to the drive assembly is designed to be shorter. In this way, the driving force of the drive assembly exerts a smaller torque on the movable carrier. In the case where the driving force may tilt relative to the movable carrier, the present application reduces the risk of tilting the movable carrier by reducing the torque, and the position of the movable carrier and the lens assembly thereon can be adjusted as expected.

[0136] (2) Further tilting of the movable carrier may cause the support assembly to get stuck, which in turn causes the movable carrier to be unable to move relative to the fixed frame and unable to achieve the focusing function. The present application reduces the risk of tilting of the movable carrier and can also reduce the probability of the support assembly getting stuck, so that the position of the movable carrier can be smoothly adjusted and the piezoelectric motor can reliably achieve the focusing function, thereby improving the photographic effect.

[0137] (3) The setting of the support assembly can reduce the friction contact area between the movable carrier and the fixed frame, which is beneficial to reducing the friction force received by the movable carrier when it moves relative to the fixed frame, and the movable carrier is easy to be driven by the driving assembly.

[0138] To achieve the above objectives, the technical solution adopted in this application is: a driving device applied to a camera module, which includes:

[0139] Fixed frame;

[0140] a movable carrier, the movable carrier being movably arranged on the fixed frame;

[0141] a driving assembly connected to the fixed frame and abutting against the movable carrier to apply a pre-pressure to the movable carrier and adapted to drive the movable carrier to move relative to the fixed frame upon receiving a driving signal;

[0142] The support assembly includes a first support member and a second support member, the first support member abuts against the fixed frame and the movable carrier respectively, and there is a certain gap between the second support member and the fixed frame and / or the movable carrier.

[0143] As a preference, the support assembly and the drive assembly are arranged on the same side of the drive device.

[0144] Preferably, the first support member and the second support member are located on the same side of the driving assembly.

[0145] Preferably, the first support member is closer to the driving assembly than the second support member.

[0146] Preferably, the first support member and the second support member are located on both sides of the driving assembly.

[0147] As a preference, along the pre-pressure direction, the first support member, the second support member, and the drive assembly are arranged along a straight line.

[0148] Preferably, the movable carrier includes a first outer convex portion, the fixed frame includes a first inner convex portion, the first outer convex portion and the first inner convex portion are arranged opposite to each other, and the first support member is arranged between the first outer convex portion and the first inner convex portion.

[0149] As a preference, a first guide portion is provided on the first outer convex portion, a second guide portion is provided on the first inner convex portion, and both sides of the first support member are respectively in contact with the first guide portion and the second guide portion, and the first guide portion, the second guide portion and the first support member cooperate to guide the movable carrier to move along the first direction.

[0150] Preferably, the movable carrier further includes a second outer convex portion, the fixed frame further includes a second inner convex portion, the second outer convex portion and the second inner convex portion are arranged opposite to each other, and the second support member is arranged between the second outer convex portion and the second inner convex portion.

[0151] As a preference, a third guide portion is provided on the second outer convex portion, a fourth guide portion is provided on the second inner convex portion, and the second support member is arranged between the third guide portion and the fourth guide portion. The third guide portion, the fourth guide portion and the second support member cooperate to provide a certain space for adjustment of the movable carrier.

[0152] Preferably, the first support member and the second support member are guide rods, the guide rods are arranged along a first direction, and at least two protrusions suitable for contacting the guide rods are provided on the movable carrier at intervals along the first direction.

[0153] As a preference, the driving assembly includes a pre-stressing assembly and an actuating assembly, the pre-stressing assembly is connected to the fixed frame, and the actuating assembly is connected to the pre-stressing assembly, the pre-stressing assembly provides pre-stress to the actuating assembly, so that the driving end of the actuating assembly abuts against the movable carrier and applies the pre-stress to the movable carrier, so that the actuating assembly is suitable for driving the movable carrier to move relative to the fixed frame when receiving a driving signal.

[0154] Preferably, the pre-stressing assembly includes a structural member and a buffer member, the structural member is connected to the fixed frame, the buffer member is arranged between the structural member and the actuating assembly, and is suitable for being deformed by being squeezed by the structural member and the actuating assembly.

[0155] To achieve another purpose of this application, the technical solution adopted in this application is: a camera module, which includes:

[0156] The aforementioned drive device;

[0157] a lens assembly, disposed in the driving device; and

[0158] The photosensitive component is arranged relative to the lens component.

[0159] Compared with the prior art, the present invention has the following advantages:

[0160] (1) Under the action of the preload of the driving device, the first support member abuts against the fixed frame and the movable carrier respectively. The first support member is tightly fitted with the fixed frame and the movable carrier, so that the movable carrier is movably supported on the fixed frame and can move smoothly. There is a certain gap between the second support member and the fixed frame and / or the movable carrier, that is, the second support member is loosely fitted, which can provide a certain space for the adjustment of the movable carrier. In the case that the movable carrier tilts due to the influence of the preload, the second support member abuts against the fixed frame and the movable carrier, which can correct the movable carrier and drive the movable carrier in the expected direction of movement.

[0161] (2) The tilt of the movable carrier may further cause the support assembly to get stuck, which in turn causes the movable carrier to be unable to move relative to the fixed frame and unable to achieve the focusing function. The present application reduces the risk of the movable carrier tilting and can also reduce the probability of the support assembly and the movable carrier getting stuck, so that the position of the movable carrier can be smoothly adjusted and the driving device can reliably achieve the focusing function, thereby improving the photographic effect.

[0162] (3) The setting of the support assembly can reduce the friction contact area between the movable carrier and the fixed frame, which is beneficial to reducing the friction force received by the movable carrier when it moves relative to the fixed frame, and the movable carrier is easy to be driven by the driving assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0163] FIG1 is a schematic structural diagram of a driving mechanism in the prior art;

[0164] Figure 2 is a schematic diagram of pre-stress inclination;

[0165] FIG3 is a schematic diagram of the three-dimensional structure of a driving mechanism in a preferred embodiment of the present application;

[0166] FIG4 is a schematic diagram of an exploded structure of a driving mechanism in a preferred embodiment of the present application;

[0167] FIG5 is a top view of a driving mechanism in a preferred embodiment of the present application;

[0168] FIG6 is a cross-sectional view taken along the line BB in FIG5 ;

[0169] FIG7 is a top view of a movable member in a preferred embodiment of the present application;

[0170] FIG8 is a top view of a fixing member in a preferred embodiment of the present application;

[0171] FIG9 is a top view of a driving mechanism in another preferred embodiment of the present application;

[0172] FIG10 is a cross-sectional view taken along the CC direction in FIG9 ;

[0173] FIG11 is a schematic diagram of the three-dimensional structure of a driving assembly in a preferred embodiment of the present application;

[0174] FIG12 is a schematic structural diagram of a friction-resistant plate in a preferred embodiment of the present application;

[0175] FIG13 is a schematic structural diagram of a pre-pressing assembly in another preferred embodiment of the present application;

[0176] FIG14 is a schematic cross-sectional view of the pre-pressing assembly shown in FIG13 ;

[0177] FIG15 is a schematic structural diagram of a driving mechanism in another embodiment of the present application;

[0178] FIG16 is a schematic structural diagram of a driving mechanism in another embodiment of the present application;

[0179] FIG17 is a schematic structural diagram of a driving mechanism in the prior art;

[0180] FIG18 is a schematic diagram of pre-pressure inclination;

[0181] FIG19 is a schematic diagram of the three-dimensional structure of a driving mechanism in a preferred embodiment of the present application;

[0182] FIG20 is a schematic diagram of an exploded structure of a driving mechanism in a preferred embodiment of the present application;

[0183] FIG21 is a top view of a driving mechanism in a preferred embodiment of the present application;

[0184] FIG22 is a cross-sectional view taken along the AA direction in FIG21 ;

[0185] FIG23 is a cross-sectional view taken along line BB in FIG21 ;

[0186] FIG24 is a schematic diagram of an exploded structure of a driving assembly in a preferred embodiment of the present application;

[0187] FIG25 is a top view of a fixed frame in a preferred embodiment of the present application;

[0188] FIG26 is a top view of a movable carrier in a preferred embodiment of the present application;

[0189] FIG27 is a cross-sectional view of a driving mechanism along a direction perpendicular to the central axis in a preferred embodiment of the present application;

[0190] FIG28 is a cross-sectional view taken along the CC direction in FIG21;

[0191] FIG29 is a schematic diagram of a partial structure of a movable carrier in a preferred embodiment of the present application;

[0192] FIG30 is a schematic diagram of a partial structure of a fixed frame in a preferred embodiment of the present application;

[0193] FIG31 is a schematic structural diagram of a pre-pressing assembly in another preferred embodiment of the present application;

[0194] FIG32 is a schematic cross-sectional view of the pre-pressing assembly shown in FIG31 ;

[0195] FIG33 is a schematic structural diagram of a driving mechanism in another embodiment of the present application;

[0196] FIG34 is a schematic structural diagram of a driving mechanism in another embodiment of the present application;

[0197] FIG35 is a schematic structural diagram of a driving mechanism in yet another embodiment of the present application;

[0198] FIG36 is a cross-sectional view of a camera module in a preferred embodiment of the present application;

[0199] FIG37 is a schematic diagram of the exploded structure of a piezoelectric motor in a preferred embodiment of the present application;

[0200] FIG38 is a schematic diagram of the internal structure of a piezoelectric motor in a preferred embodiment of the present application;

[0201] FIG39 is a schematic diagram of the explosion structure of a pre-pressing assembly in the prior art;

[0202] FIG40 is a schematic diagram of the tilting of the actuating assembly and the movable member after the deformation of the pre-pressing assembly in the prior art;

[0203] FIG41 is a schematic structural diagram of a base and a first frame in a preferred embodiment of the present application;

[0204] FIG42 is a schematic structural diagram of the first frame and the second frame in a preferred embodiment of the present application;

[0205] FIG43 is a schematic structural diagram of the second frame and the third frame in a preferred embodiment of the present application;

[0206] FIG44 is a schematic structural diagram of three driving components and a flexible circuit board in a preferred embodiment of the present application;

[0207] FIG45 is a schematic diagram of the explosion structure of a pre-pressing assembly in another preferred embodiment of the present application;

[0208] FIG46 is a schematic diagram of the working principle of the actuating assembly in a preferred embodiment of the present application;

[0209] FIG47 is an enlarged view of the local structure at point A in FIG38;

[0210] FIG48 is a schematic diagram of the connection between the structural member and the fixing member;

[0211] FIG49 is a schematic structural diagram of a piezoelectric motor in the prior art;

[0212] FIG50 is a schematic diagram of a movable carrier tilted;

[0213] FIG51 is a top view of a piezoelectric motor in a preferred embodiment of the present application;

[0214] FIG52 is a schematic diagram of the exploded structure of a piezoelectric motor in a preferred embodiment of the present application;

[0215] FIG53 is a schematic diagram of the cross-sectional structure taken along the AA direction in FIG51;

[0216] FIG54 is a schematic diagram of the three-dimensional structure of the movable carrier;

[0217] FIG55 is a schematic diagram of a partial structure of a piezoelectric motor at a first support member;

[0218] FIG56 is a schematic diagram of the partial structure of the piezoelectric motor at the second support member;

[0219] FIG57 is a schematic diagram of the cross-sectional structure along the BB direction in FIG51;

[0220] FIG58 is a schematic diagram of the exploded structure of the drive assembly;

[0221] FIG59 is a schematic diagram showing the working principle of a piezoelectric vibrator;

[0222] Figure 60 is a schematic diagram of the installation of structural parts;

[0223] FIG61 is a schematic structural diagram of a driving device in the prior art;

[0224] FIG62 is a schematic diagram of the movable carrier tilting caused by the pre-pressure tilting;

[0225] FIG63 is a top view of a driving device in a preferred embodiment of the present application;

[0226] FIG64 is a schematic diagram of the exploded structure of a driving device in a preferred embodiment of the present application;

[0227] FIG65 is a schematic diagram of the cross-sectional structure taken along the AA direction in FIG63;

[0228] FIG66 is a schematic diagram of the partial structure of the driving device at the first support member;

[0229] FIG67 is a schematic diagram of the partial structure of the driving device at the second support member;

[0230] FIG68 is a schematic structural diagram of a fixed frame;

[0231] Figure 69 is a schematic diagram of the structure of the movable carrier;

[0232] FIG70 is a top view of a driving device in another preferred embodiment of the present application;

[0233] FIG71 is a schematic diagram showing the positions of the support assembly and the drive assembly in another preferred embodiment of the present application;

[0234] FIG72 is a schematic diagram of the exploded structure of a driving assembly in a preferred embodiment of the present application;

[0235] FIG73 is a schematic diagram of the driving principle of the actuating assembly in a preferred embodiment of the present application;

[0236] Figure 74 is a schematic diagram of the driving principle of the actuating assembly in another preferred embodiment of the present application. DETAILED DESCRIPTION

[0237] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0238] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0239] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0240] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0241] The present application provides a driving mechanism for a camera module, as shown in Figures 3 to 16, including a fixed part 10, a movable part 20, a driving assembly 30 and a guide assembly 40. The movable part 20 is movably connected to the fixed part 10, and the driving assembly 30 abuts against the movable part 20 and provides a pre-pressure P. When the driving assembly 30 receives a driving signal, it can rub against the movable part 20 under the action of the pre-pressure P, thereby driving the movable part 20 to move. The guide assembly 40 is arranged between the fixed part 10 and the movable part 20, so that there is a fixed gap between the opposing surfaces of the fixed part 10 and the movable part 20, which can reduce the friction force on the movable part 20 when it moves relative to the fixed part 10.

[0242] In the present application, the driving mechanism has a central axis O, and the movable member 20 is movably disposed in the fixed member 10 and is suitable for moving along the central axis O direction.

[0243] In this embodiment, the movable part 20 is movably arranged in the fixed part 10, and the optical lens is carried on the movable part 20. The optical lens has an optical axis, and the direction of the central axis O is parallel to the optical axis direction of the optical lens. The movable part 20 can move along the optical axis direction relative to the fixed part 10, thereby driving the optical lens to move along the optical axis direction to realize the optical focusing function.

[0244] In some other embodiments, the movable member 20 may move relative to the fixed member 10 in a direction perpendicular to the optical axis, thereby realizing an optical image stabilization function.

[0245] In some embodiments, the driving component 30 is specifically implemented as a piezoelectric motor. The piezoelectric motor is a motor with fast response, large driving force and high driving precision, which can be used in the camera module. Specifically, the driving component 30 includes a pre-stressing component 31 and an actuating component 32. The pre-stressing component 31 is connected to the fixing component 10, and the actuating component 32 is connected to the pre-stressing component 31. The pre-stressing component 31 provides a pre-stressing force P perpendicular to the direction of the central axis O to the actuating component 32, so that the actuating component 32 abuts against one side of the movable part 20. The actuating component 32 provides a driving force F to the movable part 20 to guide the movable part 20 to move along the direction of the central axis O.

[0246] In some embodiments, the actuating assembly 32 includes a piezoelectric vibrator 322 and a friction head 323. The piezoelectric vibrator 322 is connected to the preload assembly 31. The friction head 323 is fixed to the side of the piezoelectric vibrator 322 facing the movable part 20. Under the action of the preload P, the friction head 323 abuts the side wall of the movable part 20. That is, the friction head 323 and the preload assembly 31 are respectively arranged on opposite sides of the piezoelectric vibrator 322. The high-frequency, micro-amplitude vibration of the piezoelectric vibrator 322 causes the friction head 323 to move, and the friction between the friction head 323 and the outer wall of the movable part 20 drives the movable part 20 to move linearly along the central axis O. In other words, the driving force F can actually be understood as the friction force applied by the friction head 323 on the movable part 20.

[0247] In some embodiments, the actuator assembly 32 also includes a piezoelectric circuit board 321, which is specifically a flexible circuit board, i.e., an FPC. The piezoelectric circuit board 321 is connected to the piezoelectric vibrator 322 to supply power to the piezoelectric vibrator 322. Specifically, the piezoelectric circuit board 321 can be set on the side of the piezoelectric vibrator 322 facing away from the movable part 20.

[0248] In some embodiments, the pre-compression assembly 31 is disposed on the side of the piezoelectric vibrator 322 facing away from the movable part 20 , so as to provide a pre-compression force P toward the movable part 20 to the friction head 323 disposed on the side of the piezoelectric vibrator 322 facing the movable part 20 .

[0249] The guide assembly 40 is disposed between the movable member 20 and the fixed member 10. One side of the guide assembly 40 abuts the fixed member 10, and the other side abuts the movable member 20. The guide assembly 40 applies a support force N perpendicular to the central axis O to the movable member 20. This support force N cooperates with the preload P applied by the drive assembly 30 to the movable member 20, clamping the movable member 20 between the guide assembly 40 and the fixed member 10. The movable member 20 is able to move along the central axis O under the action of the drive force F of the actuating assembly 32. That is, the drive assembly 30 and the guide assembly 40 cooperate to guide the movable member 20 to move along the central axis O. Furthermore, if the movable member 20 and the fixed member 10 are in surface contact, the movable member 20 will be subject to greater frictional resistance during movement, affecting the driving effect. The guide assembly 40 can change the contact mode between the movable member 20 and the fixed member 10, such as point contact or line contact, thereby reducing the frictional contact area between the movable member 20 and the fixed member 10, which helps to reduce the friction force f1 experienced by the movable member 20 when moving relative to the fixed member 10.

[0250] It should be understood that in one embodiment of the present application, as shown in Figures 10 and 11, the guide assembly 40 can be implemented as a ball 43. Under the action of the preload assembly 31, multiple balls 43 are clamped between the movable part 20 and the fixed part 10, and the balls 31 are in point contact with the movable part 20 and the fixed part 10. In another embodiment of the present application, considering that 1) the balls 43 are in point contact with both the movable part 20 and the fixed part 10, when the movable part 20 tilts, a large tilt angle may be generated between the movable part 20 and the balls 43, causing the balls 43 to get stuck and sliding friction to occur; 2) the balls 43 may switch between the rolling state and the sliding state at will during movement, increasing the risk of the movable part 20 getting stuck; 3) the movable part 20 and the balls 43 may fall off, or debris generated between the balls 43 and the movable part 20 and the fixed part 10 due to friction, impact, or other reasons may cause the balls 43 to get stuck, and then the movable part 20 to get stuck. These situations will make the movable part 20 unable to move further, affecting the focusing effect. To this end, as shown in Figures 4 to 7, the guide assembly 40 can be implemented as a guide rod 44. Under the action of the pre-load assembly 31, multiple guide rods 44 are clamped between the movable part 20 and the fixed part 10. There is line contact between the guide rod 44 and the movable part 20 and the fixed part 10, which reduces the risk of jamming compared to the ball 43.

[0251] It can be understood that, as shown in Figure 2, the piezoelectric vibrator 322 causes the friction head 323 to move by deformation, and when the piezoelectric vibrator 322 is deformed, the angle between the friction head 323 and the abutment surface of the movable part 20 changes accordingly, resulting in the pre-pressure P not acting perpendicularly on the side wall of the movable part 20, but the direction of the pre-pressure P has a certain inclination relative to the plane where the side wall of the movable part 20 is located. At the same time, when the hardness of the pre-pressure component 31 is relatively small, the pre-pressure component 31 may bend to a certain extent due to the deformation of the piezoelectric vibrator 322, resulting in the direction of the pre-pressure P relative to the angle of the abutment surface changing. That is to say, under certain circumstances, the direction of the pre-pressure P is inclined relative to the plane where the side wall of the movable part 20 is located. In this case, when the actuating component 32 drives the movable part 20 to move, it is easy to cause the movable part 20 to tilt.

[0252] In particular, in some embodiments, as shown in FIG1 , the guide assembly 40 is disposed at two diagonal positions of the movable member 20. From a top-down perspective, the guide assembly 40 disposed at the two diagonal positions of the movable member 20 and the actuator assembly 32 form a three-point arrangement on the side wall of the movable member 20. The distance from the center position of the frictional contact between the actuator assembly 32 and the movable member 20 to the line connecting the guide assembly 40 disposed at the two diagonal positions is a lever arm x. The magnitude of the overturning moment M of the movable member 20 at the diagonal position is positively correlated with the magnitude of the lever arm x. The three-point arrangement results in a larger lever arm x and overturning moment M. When the movable member 20 is driven by the actuator assembly 32 to move along the central axis O, the movable member 20 will generate a larger inclination angle, causing the movable member 20 to tilt, affecting the speed and effect of optical focusing. In addition, in this structure where the guide assembly 40 is arranged at a diagonal position, the two diagonal guide assemblies 40 may generate uncertain friction, causing the moving stroke and moving speed of the movable part 20 to be substandard. Moreover, the diagonal guide assembly 40 may squeeze the driving assembly 30, causing the friction of the guide assembly 40 to increase.

[0253] Furthermore, when the guide assembly 40 is implemented as a ball bearing 43, there is a possibility that the movable member 20 and the ball bearing 43 may become stuck, or the movable member 20 and the ball bearing 43 may fall off, preventing the movable member 20 from moving further and affecting the focusing effect. Of course, when the guide assembly 40 is implemented as a guide rod 44, the situation is better than that of the ball bearing 43, but the tilt of the movable member 20 will also affect the optical focusing effect.

[0254] To address the above-mentioned issues, in one embodiment of the present application, the guide assembly 40 and the drive assembly 30 are arranged on the same side of the movable part 20. As shown in Figures 3 to 6, compared to the arrangement of the two guide assemblies 40 and the friction head 323 of the actuating assembly 32 at three points on the side wall of the movable part 20, the arrangement of the guide assembly 40 and the drive assembly 30 on the same side of the movable part 20 reduces the distance from the friction head 323 of the actuating assembly 32 to the line connecting the two guide assemblies 40, that is, x becomes smaller, thereby reducing the torque M. When the movable part 20 is driven by the actuating assembly 32 to move along the central axis O, the inclination angle of the movable part 20 is small, which reduces the risk of the movable part 20 tilting and avoids affecting the optical focusing effect.

[0255] However, it is inevitable that, under the condition of preload P tilting, the movable part 20 may still tilt due to the presence of an assembly gap. Here, the assembly gap refers to the gap reserved so that the movable part 20 and the guide assembly 40 can be assembled in the fixed part 10. This assembly gap allows the movable part 20 and the guide assembly 40 to be assembled in the fixed part 10, but also leaves room for the movable part 20 to tilt. In some cases, due to manufacturing tolerances of the fixed part 10, the movable part 20, and the guide assembly 40, as well as other factors during the processing and assembly process, the assembly between the guide assembly 40 and the fixed part 10 and the movable part 20 may not be tight enough, resulting in a greater possibility of tilting of the movable part 20. Once the movable part 20 tilts to a certain extent, the guide assembly 40 will be stuck between the movable part 20 and the fixed part 10, making it impossible for the movable part 20 to move to achieve the optical focus function.

[0256] To this end, the present application improves the structure of the driving mechanism and proposes a driving mechanism for a camera module: as shown in Figures 3 to 14, it includes a fixed part 10, a movable part 20, a driving assembly 30, a guide assembly 40 and a magnetic attraction assembly 50, the fixed part 10 includes a supporting surface 11, the movable part 20 is movably arranged on the fixed part 10, the movable part 20 includes a contact surface 21, the supporting surface 11 and the contact surface 21 are arranged opposite to each other, the guide assembly 40 is located between the supporting surface 11 and the contact surface 21, so that a fixed gap is maintained between the fixed part 10 and the movable part 20, the driving assembly 30 is connected to the fixed part 10, and at the same time abuts against the movable part 20 and provides a Pre-pressure P, the magnetic component 50 includes at least one pair of second magnetic components 51 and first magnetic components 52, the first magnetic component 52 is arranged on one of the fixed component 10 and the movable component 20, and the second magnetic component 51 is arranged on the other of the fixed component 10 and the movable component 20. The first magnetic component 52 and the second magnetic component 51 interact with each other to adsorb the contact surface 21 of the movable component 20 to the support surface 11 of the fixed component 10, that is, the first magnetic component 52 and the second magnetic component 51 can attract each other to generate magnetic attraction, so that the contact surface 21 and the support surface 11 remain in contact with the guide component 40, thereby keeping the contact surface 21 parallel to the support surface 11.

[0257] The magnetic attraction of the magnetic assembly 50 causes the contact surface 21 of the movable member 20 to tend to move toward the support surface 11 of the fixed member 10. This allows the contact surface 21 and the support surface 11 to cooperate to clamp the guide assembly 40, providing a stable and reliable clamping, thereby achieving a tight fit among the fixed member 10, the movable member 20, and the guide assembly 40. When the movable member 20 tilts under the preload P of the drive assembly 30, the magnetic attraction acts on the movable member 20, causing its position to be promptly corrected, thereby maintaining the parallelism between the support surface 11 and the contact surface 21. This prevents the movable member 20 from tilting during movement, allowing the movable member 20 to move smoothly along the central axis O of the drive assembly. Furthermore, the magnetic assembly 50 has a simple structure and low cost.

[0258] Furthermore, the magnetic force and the pre-pressure P are in the same direction, and the movable part 20 can be supported in parallel on the fixed part 10 at the same time. In other words, the second magnetic part 51 and the first magnetic part 52 are arranged relative to each other along the direction of the pre-pressure P to avoid the pre-pressure P generating a component force in a direction perpendicular to the central axis O, causing the movable part 20 to be displaced under the action of the component force and affecting the camera function. Even in the case where the pre-pressure P is tilted, it is not perpendicular to the component force of the friction head 323 and the contact surface of the movable part 20, and it is difficult to cause the movable part 20 to tilt, thereby keeping the relative surfaces of the movable part 20 and the fixed part 10 parallel to each other. It should be added that, in some embodiments, when the guide assembly 40 is provided with multiple support members, due to the action of the magnetic assembly 50, the support surface 11 and the contact surface 21 can clamp each support member, which is beneficial to improve the parallelism between different support members, thereby reducing the assembly tolerance of the drive mechanism and ensuring the stable operation of the drive mechanism.

[0259] Based on the provision of the magnetic attraction assembly 50, the present application can provide an embodiment, as shown in FIG15 , in which two guide assemblies 40 are provided at two diagonal corners of the movable part 20, and the drive assembly 30 and the two guide assemblies 40 are provided at three points on the side wall of the movable part 20. It can be understood that due to the presence of the magnetic attraction force, when the preload force P is tilted, although the overturning moment M is large, the magnetic attraction force can offset part or all of the component of the preload force P that is not perpendicular to the contact surface between the friction head 323 and the movable part 20, thereby reducing the possibility of the movable part 20 tilting.

[0260] The present application can also provide an embodiment, as shown in Figure 16, the guide assembly 40 and the drive assembly 30 are arranged on opposite sides of the movable part 20. In this case, the overturning moment M of the movable part 20 is also large, but the magnetic attraction force can offset part or all of the component force of the pre-pressure P that is not perpendicular to the contact surface between the friction head 323 and the movable part 20, thereby reducing the possibility of the movable part 20 tilting.

[0261] In conjunction with Figures 4 and 8 to 10, the present application further explains the structure of the magnetic attraction component 50. In this embodiment, the guide component 40 and the drive component 30 are arranged on the same side of the movable part 20 to reduce the torque M and reduce the risk of tilting of the movable part 20.

[0262] Specifically, in some embodiments, the guide assembly 40 includes a first guide member 41 and a second guide member 42, and the first guide member 41 and the second guide member 42 are both disposed adjacent to the drive assembly 30. More specifically, the movable member 20 includes a first outer wall 22, a second outer wall 23, and a third outer wall 24 connected in sequence, and the first outer wall 22 and the third outer wall 24 are disposed opposite each other. The fixed member 10 includes a first inner wall 12, a second inner wall 13, and a third inner wall 14 connected in sequence. The drive assembly 30 is disposed between the second inner wall 13 and the second outer wall 23, the first inner wall 12 is disposed opposite the first outer wall 22, and the third inner wall 14 is disposed opposite the third outer wall 24. The first guide member 41 is disposed between the first outer wall 22 and the first inner wall 12 and is disposed on a side relatively close to the drive assembly 30. The second guide member 42 is disposed between the second outer wall 23 and the second inner wall 13, and the first guide member 41 and the second guide member 42 are disposed opposite each other.

[0263] Furthermore, the guide assembly 40, the drive assembly 30 and the magnetic assembly 50 are all arranged on the same side of the movable part 20. The relatively concentrated arrangement of the several structures applying force to the movable part 20 is conducive to maintaining a compact structure.

[0264] In some embodiments, the magnetic assembly 50 includes a first set of magnetic assemblies 54 and a second set of magnetic assemblies 55 disposed opposite the drive assembly 30. The first set of magnetic assemblies 54 and the second set of magnetic assemblies 55 are disposed on either side of the drive assembly 30. This provides magnetic attraction to the movable member 20 from both sides, resulting in a more effective magnetic attraction.

[0265] In some embodiments, the position of the magnetic component 50 is related to the position of the guide component 40, and the magnetic component 50 is arranged adjacent to the guide component 40. Specifically, the first group of magnetic components 54 is arranged adjacent to the first guide member 41, and the second group of magnetic components 55 is arranged adjacent to the second guide member 42, so that the torque between the magnetic force and the guide component is relatively small, the magnetic force can act more directly on the guide component 40, and the utilization rate of the magnetic force is high.

[0266] In a specific embodiment of the present application, along a direction parallel to the preload force P, the first magnetic member 52 and the second magnetic member 51 in the first magnetic assembly 54 are respectively arranged on either side of the first guide member 41, and the first magnetic member 52 and the second magnetic member 51 in the second magnetic assembly 55 are respectively arranged on either side of the second guide member 42. The first magnetic member 52 and the second magnetic member 51 in the first magnetic assembly 54 attract each other, and the first magnetic member 52 and the second magnetic member 51 in the second magnetic assembly 55 attract each other. That is, the first magnetic assembly 54 and the first guide member 41 are arranged collinearly, and the second magnetic assembly 55 and the second guide member 42 are arranged collinearly, which facilitates direct application of magnetic attraction force to the contact surface 21 and the support surface 11, thereby clamping the guide assembly 40.

[0267] In some embodiments, a plane passing through the centerline of the preload assembly 31 and extending in the direction of the preload force P is used as a reference plane, and the first and second magnetic assemblies 54, 55 are symmetrically arranged about the reference plane to provide equal magnetic attraction forces to both sides of the movable member 20. Specifically, the preload force P may be applied at the center of the contact sidewall between the friction head 323 and the movable member 20. The first and second magnetic assemblies 54, 55 are symmetrically arranged on either side of the preload assembly 31, so that the movable member 20 is subjected to symmetrical magnetic attraction forces on both sides. This prevents the movable member 20 from tilting due to the different magnetic attraction forces on both sides, thereby preventing the optical focus and / or optical image stabilization effects from being affected.

[0268] In some embodiments, the present application also takes into account that the movable part 20 can move relative to the fixed part 10. In order to ensure that there is always a certain magnetic force between the second magnetic part 51 and the first magnetic part 52 during the movement of the movable part 20, along the direction of the central axis O, the length of the second magnetic part 51 is Y, and the length of the first magnetic part 52 is L. L and Y are larger and smaller, so that when the movable part 20 is within a certain range of motion, the area directly opposite to each other between the second magnetic part 51 and the first magnetic part 52 remains basically constant.

[0269] Furthermore, along the central axis O, the travel range of the movable part 20 under the drive of the driving component 30 is D, Y>L+D, or L>Y+D. Then, during the entire movement process of the movable part 20 driven by the driving component 30, the first magnetic part 52 and the second magnetic part 51 have a portion of the opposite surfaces maintained overlapping in the direction perpendicular to the central axis O. Therefore, during the movement of the movable part 20, a certain magnitude of magnetic attraction force is always generated between the second magnetic part 51 and the first magnetic part 52.

[0270] In this embodiment, the length Y of the first magnetic member 52 is greater than the sum of the length L of the second magnetic member 51 and the travel range D of the movable member 20 .

[0271] Furthermore, the width of the first magnetic member 52 is greater than that of the second magnetic member 51, and the edge of the second magnetic member 51 can be directly opposite to the inside of the first magnetic member 52. The first magnetic member 52 and the second magnetic member 51 can always generate a certain magnetic attraction between each other.

[0272] In some embodiments, a mounting groove 173 is provided on the fixed member 10, and the first magnetic member 52 is installed in the mounting groove 173. A receiving groove 273 is provided on the movable member 20, and the second magnetic member 51 is installed in the receiving groove 273. The second magnetic member 51 and the first magnetic member 52 do not occupy additional space, which is conducive to keeping the structure of the entire driving mechanism compact. In addition, the second magnetic member 51 and the first magnetic member 52 are shielded and protected by the mounting groove 173 and the receiving groove 273, respectively. Figure 9 is a top view of the driving mechanism in a preferred embodiment of the present application. Since the second magnetic member 51 is in the receiving groove 273 and is in a shielded state, the second magnetic member 51 is indicated by a dotted line in the figure.

[0273] In some embodiments, the second magnetic member 51 and the first magnetic member 52 are both configured in a regular block or sheet shape, with a simple structure and easy processing and forming, and convenient for opening a corresponding shaped receiving groove 273 or installation groove 173.

[0274] In some embodiments, the first magnetic member 52 is a magnet having magnetic attraction, and the second magnetic member 51 is an object suitable for being attracted by the magnet.

[0275] In other embodiments, the second magnetic member 51 is a magnet with magnetic attraction, and the first magnetic member 52 is an object suitable for being attracted by the magnet.

[0276] It can be understood that the magnet can be a metal alloy permanent magnet, such as neodymium iron boron permanent magnet, aluminum nickel cobalt permanent magnet, or ferrite permanent magnet, or rare earth permanent magnet. Objects suitable for being adsorbed by the magnet include but are not limited to magnets and metal sheets, such as low-cost iron sheets. The second magnetic attraction component 51 and the first magnetic attraction component 52 can attract each other, and their specific materials are not limited.

[0277] In some other embodiments, the second magnetic component 51 and the first magnetic component 52 may be mutually exclusive. For example, the two are magnets with the same polarity. It can be understood that it is necessary to adjust the installation position of the magnetic component 50 at this time so that the magnetic force exerted by the magnetic component 50 on the movable part 20 is opposite to the pre-pressure P of the driving component 30. For example, the second magnetic component 51 can be set on the second outer wall 23 of the movable part 20, and the first magnetic component 52 can be set on the second inner wall 13 of the fixed part 10.

[0278] In some embodiments, the driving mechanism further includes a magnetic induction member 53 , which is disposed relative to the magnetic attraction assembly 40 , thereby determining the position of the movable member 20 by inducing changes in the magnetic field.

[0279] It can be understood that the magnetic induction component 53 is arranged relative to the magnetic attraction component 40, which means that the magnetic induction component 53 is arranged relative to the magnet. For example, when the second magnetic attraction component 51 on the movable part 20 is a magnet, the magnetic induction component 53 can be arranged on the fixed part 10 relative to the second magnetic attraction component 51 so that changes in the magnetic field can be detected.

[0280] In this embodiment, the magnetic induction component 53 and the second magnetic attraction component 51 are arranged opposite to each other in a direction parallel to the pre-pressure P. The second magnetic attraction component 51 is a magnet. When the movable part 20 moves, the relative position between the magnetic induction component 53 and the magnet changes, and the strength of the magnetic field sensed by the magnetic induction component 53 changes, so that the current position of the movable part 20 can be judged, which facilitates the control of the driving component 30 to adjust the position of the movable part 20.

[0281] Specifically, the magnetic induction element 53 is a Hall induction sensor, a magnetoelectric induction sensor, or a magnetoresistive effect sensor, such as a magnetic sensitive element TMR using the tunnel magnetoresistive effect, or a chip integrated with a magnetic induction function, or other elements capable of sensing changes in magnetic field.

[0282] In some embodiments, there is one magnetic induction member 53 , which is arranged relative to a magnet in the magnetic attraction component 40 . In other embodiments, there are two magnetic induction members 53 , which are arranged relative to the magnets in the first group of magnetic attraction components 54 and the second group of magnetic attraction components 55 , respectively.

[0283] In some embodiments, the movable member 20 or the fixed member 10 is provided with an embedding groove, and the magnetic sensing member 53 is disposed in the embedding groove. Firstly, it can shield and protect the magnetic sensing element, and secondly, the magnetic sensing member 53 does not need to occupy additional space, which helps to keep the structure of the entire drive mechanism compact.

[0284] As a supplement, the present application describes the adaptation structure between the movable part 20 and the fixed part 10 .

[0285] In some embodiments, the movable part 20 is provided with an outer convex portion 27, which protrudes from the outer wall of the movable part 20 in a direction away from the driving component 30, and the fixed part 10 is provided with an inner convex portion 17, which protrudes from the inner wall of the fixed part 10 in a direction close to the driving component 30. The outer convex portion 27 and the inner convex portion 17 are arranged opposite to each other, and a contact surface 21 is formed on the outer convex portion 27, and a support surface 11 is formed on the inner convex portion 17. The structure is simple and can achieve structural adaptation of the movable part 20 and the fixed part 10, so that the movable part 20 can be tightly assembled on the fixed part 10.

[0286] Furthermore, the outer protrusion 27 and the inner protrusion 17 are both located on a side adjacent to the drive assembly 30, allowing the guide assembly 40 and the drive assembly 30 to be located on the same side of the movable member 20. The guide assembly 40 is clamped between the outer protrusion 27 and the inner protrusion 17, thereby reducing the value of x and thereby lowering the value of the overturning moment M acting on the movable member 20, thereby reducing the risk of the movable member 20 tilting.

[0287] Furthermore, in this embodiment, the second magnetic component 51 is arranged on the outer protrusion 27, the first magnetic component 52 is arranged on the inner protrusion 17, and the guide assembly 40 and the magnetic assembly 50 are concentrated at the inner protrusion 17 and the outer protrusion 27, which is conducive to keeping the structure of the entire driving mechanism compact.

[0288] More specifically, in this embodiment, the magnetic sensing member 53 and the first magnetic member 52 are disposed on the inner protrusion 17 of the fixed member 10, the second magnetic member 51 is disposed on the outer protrusion 27 of the movable member 20, and the first magnetic member 52 is disposed between the magnetic sensing member 53 and the second magnetic member 51. The three magnetic members 53 and 51 are collinear with the second guide member 42 along the direction parallel to the preload force P. The guide assembly 40, the magnetic assembly 50, and the magnetic sensing member 53 are concentrated on the inner protrusion 17 and the outer protrusion 27, which helps maintain the compact structure of the entire drive mechanism. Furthermore, the second magnetic member 51 is a magnet, and the sum of its length Y and the movable member stroke D is less than the length L of the first magnetic member 52. The magnetic sensing member 53 and the second magnetic member 51 are opposite each other, which facilitates detecting changes in the magnetic field and thereby determining the position of the movable member 20.

[0289] Furthermore, the movable member 20 is provided with an inner recess 26, which is formed by being recessed from the outer side wall of the movable member 20 in a direction close to the driving assembly 30. The outer protrusion 27 is connected to the inner recess 26 and cooperates to form a first groove 28. The inner protrusion 17 is suitable for being inserted into the first groove 28. Correspondingly, the fixed member 10 is provided with an outer recess 16, which is formed by being recessed from the inner side wall of the fixed member 10 in a direction away from the driving assembly 30. The outer recess 16 is connected to the inner protrusion 17 and cooperates to form a second groove 18. The outer protrusion 27 is suitable for being inserted into the second groove 18. The inner protrusion 17 and the outer protrusion 27 can relatively extend a greater distance in a direction perpendicular to the central axis O, which facilitates the arrangement of the guide assembly 40. In addition, the adaptation structure between the fixed member 10 and the movable member 20 is relatively compact, which helps to reduce the size of the driving mechanism in the direction perpendicular to the optical axis.

[0290] In some embodiments, the guide assembly 40 includes a first guide member 41 and a second guide member 42. Correspondingly, the outer protrusion 27, the inner recess 26, the inner protrusion 17, and the outer recess 16 are all set to two, and the relevant structure is as follows: the side of the first outer wall 22 connected to the second outer wall 23 protrudes outward in the direction away from the driving assembly 30 to form a first outer protrusion 271, and the first outer wall 22 is concave inward from the side of the first outer protrusion 271 away from the second outer wall 23 along the direction close to the driving assembly 30 to form a first inner recess 261, and the first inner recess 261 cooperates with the first outer protrusion 271 to form a first groove 281. Similarly, the side of the third outer wall 24 connected to the second outer wall 23 protrudes outward in the direction away from the driving assembly 30 to form a second outer protrusion 272, and the third outer wall 24 is concave inward from the side of the second outer protrusion 272 away from the second outer wall 23 along the direction close to the driving assembly 30 to form a second inner recess. Part 262, the second inner recess 262 cooperates with the second outer protrusion 272 to form a first groove 282; similarly, the side of the first inner side wall 12 connected to the second inner side wall 13 is recessed outwardly in the direction away from the driving component 30 to form a first outer recess 161, and the first inner side wall 12 protrudes inwardly in the direction close to the driving component 30 from the side of the first outer recess 161 away from the second inner side wall 13 to form a first inner protrusion 171, and the first outer recess 161 cooperates with the first inner protrusion 171 to form a second groove 181; the side of the third inner side wall 14 connected to the second inner side wall 13 is recessed outwardly in the direction away from the driving component 30 to form a second outer recess 162, and the third inner side wall 14 protrudes inwardly in the direction close to the driving component 30 from the side of the second outer recess 162 away from the second inner side wall 13 to form a second inner protrusion 172, and the second inner protrusion 172 cooperates with the second outer recess 162 to form a second groove 2 182.

[0291] In some embodiments, the guide assembly 40 includes a first guide member 41 and a second guide member 42. Correspondingly, the outer protrusion 27, the inner recess 26, the inner protrusion 17, and the outer recess 16 are all set to two, and the relevant structure is as follows: the side of the first outer wall 22 connected to the second outer wall 23 protrudes outward in the direction away from the central axis O to form a first outer protrusion 271, and the first outer wall 22 is concave inward along the direction close to the central axis O from the side of the first outer protrusion 271 away from the second outer wall 23 to form a first inner recess 261, and the first inner recess 261 cooperates with the first outer protrusion 271 to form a first groove 281. Similarly, the side of the third outer wall 24 connected to the second outer wall 23 protrudes outward in the direction away from the central axis O to form a second outer protrusion 272, and the third outer wall 24 is concave inward along the direction close to the central axis O from the side of the second outer protrusion 272 away from the second outer wall 23 to form a second inner recess. Part 262, the second inner recess 262 cooperates with the second outer protrusion 272 to form a first groove 282; similarly, the side of the first inner side wall 12 connected to the second inner side wall 13 is recessed outwardly along the direction away from the central axis O to form a first outer recess 161, and the first inner side wall 12 protrudes inwardly along the direction close to the central axis O from the side of the first outer recess 161 away from the second inner side wall 13 to form a first inner protrusion 171, and the first outer recess 161 cooperates with the first inner protrusion 171 to form a second groove 181; the side of the third inner side wall 14 connected to the second inner side wall 13 is recessed outwardly along the direction away from the central axis O to form a second outer recess 162, and the third inner side wall 14 protrudes inwardly along the direction close to the central axis O from the side of the second outer recess 162 away from the second inner side wall 13 to form a second inner protrusion 172, and the second inner protrusion 172 cooperates with the second outer recess 162 to form a second groove 2 182.

[0292] In some embodiments, the basic shape of the movable part 20 and the fixed part 10 are both square. The movable part 20 also includes a fourth outer wall 25 opposite to the second outer wall 23, and the fixed part 10 also includes a fourth inner wall 15 opposite to the second inner wall 13. The overall shape of the movable part 20 and the fixed part 10 is regular and easy to process.

[0293] In some embodiments, guide grooves extending parallel to the central axis O are respectively provided on the support surface 11 and the contact surface 21. The guide assembly 40 extends parallel to the central axis O and is clamped and limited in position by the guide grooves on either side. It is understood that the guide assembly 40 is continuously clamped in the guide grooves on either side. When the movable member 20 moves along the central axis O, the guide assembly 40 is driven by the movable member 20 and, guided by the guide grooves, moves in a direction parallel to the central axis O. During this movement, the guide assembly 40 cooperates with the guide grooves on either side to limit the movement direction of the movable member 20, preventing the movable member 20 from rotating or tilting in a plane parallel to the support surface 11, and guiding the movable member 20 to move along the central axis O.

[0294] In some embodiments, a first guide groove 111 and a third guide groove 112 are spaced apart on the support surface 11, and a corresponding second guide groove 211 and a fourth guide groove 212 are provided on the contact surface 21. The first guide groove 111 and the second guide groove 211 cooperate to clamp the first guide member 41 therein and guide the first guide member 41 to move along the central axis O. The third guide groove 112 and the fourth guide groove 212 cooperate to clamp the second guide member 42 therein, and the first guide member 41 and the second guide member 42 maintain parallelism between the support surface 11 and the contact surface 21.

[0295] In some embodiments, the first guide groove 111 and the second guide groove 211 are a pair of V-shaped grooves with their notches facing each other, and the third guide groove 112 and the fourth guide groove 212 are a pair of V-shaped grooves with their notches facing each other. The first guide member 41 and the second guide member 42 support the movable member 20 from either side of the drive assembly 30, and cooperate with the two sets of guide grooves to guide the movable member 20 along the central axis O. In other words, the first guide member 41 and the second guide member 42 support and position the movable member 20.

[0296] However, if all guide grooves 111 through 212 are designed as V-shaped grooves, manufacturing tolerances in the movable member 20 and / or the fixed member 10 may result in a certain offset between the actual guide groove positions and the preset positions. During assembly, after aligning the V-shaped openings of one set of guide grooves, the other pair of guide grooves may become misaligned, making alignment difficult. This can make it difficult to install either the first guide member 41 or the second guide member 42 between the two misaligned guide grooves. In other words, designating all guide grooves as V-shaped grooves requires high machining precision and results in high manufacturing costs.

[0297] To this end, in some embodiments, the shape of the guide groove is improved so that the second guide member 42 can move in a direction perpendicular to the central axis O along the bottom of the third guide groove 112 and / or the bottom of the fourth guide groove 212 .

[0298] Specifically, in this embodiment, the first guide groove 111 and the second guide groove 211 are V-shaped grooves with their openings facing each other, and the third guide groove 112 and the fourth guide groove 212 are arranged with their openings facing each other. At least one of the grooves is a planar groove having a bottom parallel to the support surface 11, allowing the second guide member 42 therein to move along the bottom of the third guide groove 112 and / or the bottom of the fourth guide groove 212 in a direction perpendicular to the central axis O. The movable member 20 and the fixed member 10 are supported and positioned by the V-shaped first and second guide grooves 111, 211, and the first guide member 41 within the V-shaped grooves. Due to manufacturing tolerances, when aligning the first guide groove 111 and the second guide groove 211, there may be some misalignment between the third guide groove 112 and the fourth guide groove 212. However, because at least one of the two is a planar groove, the position of the second guide member 42 within the planar groove can be fine-tuned along the bottom of the planar groove, thereby resolving the problem of difficulty in assembling the second guide member 42 caused by misalignment between the third guide groove 112 and the fourth guide groove 212. The provision of the planar groove means that a certain distance deviation is allowed between the center of the planar groove and the center of the guide groove directly opposite it. In other words, a certain range of manufacturing tolerances is allowed between the movable member 20 and the fixed member 10, reducing the precision requirements for the manufacturing of the movable member 20 and the fixed member 10 and reducing the processing and assembly costs.

[0299] In some embodiments, one of the third guide groove 112 and the fourth guide groove 212 is a planar groove, and the other is a V-shaped groove. During assembly, the second guide member 42 can slide along the bottom of the planar groove for fine adjustment and can be positioned flush against the V-shaped groove, where it is retained. The second guide member 42 supports the movable member 20, reducing processing requirements while also facilitating easier assembly and improving assembly efficiency.

[0300] In this embodiment, both the third guide groove 112 and the fourth guide groove 212 are planar grooves. During assembly, the second guide member 42 can be slid and fine-tuned along the bottoms of the third guide groove 112 and the fourth guide groove 212. That is, the second guide member 42 can be fine-tuned toward or away from the first guide member 41. The second guide member 42 supports the movable member 20. Compared to an embodiment in which only one of the guide grooves is a planar groove, this further reduces the machining precision requirements for the movable member 20 and / or the fixed member 10. In particular, a certain range of machining tolerances can be allowed for the third guide groove 112 and the fourth guide groove 212.

[0301] In some other embodiments, the first guide groove 111 and the second guide groove 211 can also be square grooves or arc grooves. The specific shapes of the two are not limited, as long as they can just clamp the first guide member 41 to achieve the support and positioning functions. Similarly, the third guide groove 112 and the fourth guide groove 212 can also be set to other shapes, as long as they can achieve the support function, that is, as long as the second guide member 42 can be clamped between the contact surface 21 and the support surface 11.

[0302] This application further provides additional details regarding the structure of the drive assembly 30. In some embodiments, the fixed member 10 has an opening 19 extending from the outer sidewall of the fixed member 10 to the inner sidewall thereof. A preload assembly 31 is connected to the outer sidewall of the fixed member 10. The side of the preload assembly 31 facing the movable member 20 is connected to an actuating assembly 32. The actuating assembly 32 passes through the opening 19 and abuts against the movable member 20, connecting the preload assembly 31 to the outer sidewall of the fixed member 10. This arrangement facilitates assembly compared to connecting the preload assembly 31 to the inner sidewall of the fixed member 10, and helps maintain a compact drive mechanism structure.

[0303] In some embodiments, the preload assembly 31 includes a main body 311 and a fixed portion 312. The fixed portion 312 is connected to the outer wall of the fixed member 10. The main body 311 abuts the actuator assembly 32, specifically, the piezoelectric vibrator 322, or the piezoelectric circuit board 321 on the side of the piezoelectric vibrator 322 facing away from the movable member 20. The main body 311 applies a force to the piezoelectric vibrator 322 toward the movable member 20, causing the friction head 323 on the piezoelectric vibrator 322 to apply a preload P perpendicular to the central axis O to the movable member 20. Under the action of this preload P, the movable member 20 can be driven by the friction head 323.

[0304] In some embodiments, the pre-compression assembly 31 is an elastic structure. Furthermore, the elastic structure can be a planar structure, such as a spring. This also means that the main body 311 and the fixing portion 312 are an integrated structure, making the pre-compression assembly 31 more reliable and ensuring the continuous and stable provision of pre-compression force P. The plane of the planar structure extends perpendicular to the direction of the pre-compression force P.

[0305] Specifically, the main body 311 of the elastic structure can be bonded to the actuator assembly 32 by glue, so that when the piezoelectric vibrator 322 is deformed, the elastic structure can also deform adaptively. The elastic structure always contacts the actuator assembly 32 and applies pre-pressure P to it.

[0306] In some embodiments, the prestressing assembly 31 may also be a prestressing plate, with the two ends of the prestressing plate forming fixed portions 312 and the middle portion of the prestressing plate forming the main body 311. Specifically, the prestressing plate may be a plastic or metal component or other rigid structure, such as an injection-molded hard plate, stainless steel, ceramic, or diamond. Alternatively, the prestressing plate may include an inner layer structure and an outer layer structure, wherein the inner layer structure may be a metal sheet, and the inner layer structure may be integrated with the outer layer structure, such as plastic, through an insert injection molding process to form a one-piece structure.

[0307] Furthermore, the prestressing assembly 31 also includes a support member arranged on the side of the prestressing plate away from the movable part 20. The support member can be made of a rigid material such as a steel sheet to ensure that the prestressing assembly 31 can always resist the actuating assembly 32 when the piezoelectric vibrator 322 is deformed, that is, the prestressing assembly 31 directly resists the piezoelectric vibrator 322, or indirectly resists the piezoelectric vibrator 322 through the piezoelectric circuit board 321, providing a prestress P for the friction head 323.

[0308] In some embodiments, as shown in Figures 13 and 14, the pre-stressing assembly 31 includes a structural member 313 and a buffer member 314. The elastic modulus of the structural member 313 is greater than the elastic modulus of the buffer member. One side of the buffer member 314 is attached and connected to the actuating assembly 32, and the other side is attached and connected to the structural member 313. The structural member 313 is connected to the fixing member 10.

[0309] The structural member 313 with a larger elastic modulus serves as the main supporting structure and can provide rigid support. The pre-pressure P provided by the structural member 313 is transmitted to the actuating assembly 32 through the buffer member 314, so that the friction head 323 abuts against the movable member 20 under the action of pressure. In this process, the buffer member 314 with a smaller elastic modulus can be deformed and can adaptively produce different degrees of shrinkage deformation according to different tolerances, thereby reducing the difference in the pre-pressure P of the piezoelectric motor under different tolerances. In the entire contact system composed of the movable member 20, the actuating assembly 32, the buffer member 314, and the structural member 313, the change in the pre-pressure P caused by material tolerance and assembly tolerance is reduced, so that the consistency of the driving assembly 30, that is, the piezoelectric motor, is improved.

[0310] It should be noted that the buffer 314 is connected to the actuator assembly 32 , including two situations: the buffer 314 is directly attached to the piezoelectric vibrator 322 , or the buffer 314 is indirectly connected to the piezoelectric vibrator 322 by attaching the piezoelectric circuit board 321 .

[0311] Furthermore, the fixing member 10 is provided with an opening 19 that passes through the outer wall of the fixing member 10 to the inner wall thereof, the structural member 313 is connected to the outer wall of the fixing member 10, the buffer member 314 and the actuating assembly 32 thereon pass through the opening 19 and abut against the movable member 20, connecting the pre-stressing assembly 31 to the outer wall of the fixing member 10. This is more convenient to operate than connecting the pre-stressing assembly 31 to the inner wall of the fixing member 10, and this layout is conducive to keeping the drive mechanism structure compact.

[0312] It is understood that, along the direction of preload P, that is, along the installation direction between the piezoelectric vibrator 322, the buffer member 314, and the structural member 313, the projections of the buffer member 314 and the actuator assembly 32 completely fall within the opening 19, allowing the buffer member 314 and the connected actuator assembly 32 to pass through the opening 19 and abut against the movable member 20. Furthermore, along the direction of preload P, the projection of the structural member 313 extends beyond the opening 19. The area of ​​the structural member 313 corresponding to this projection beyond the opening 19 is connected to the outer wall of the fixed member 10, thereby securing the structural member 313 to the fixed member 10. In this embodiment, the length of the structural member 313 extending along the optical axis is greater than the length of the opening 19 in the fixed member 10, so that the structural member 313 is connected to the fixed member 10 at both ends. There are at least two connection areas between the structural member 313 and the fixed member 10 to ensure a certain connection strength. The buffer member 314 is positioned centrally relative to the structural member 313 to ensure symmetrical force distribution at both ends of the structural member 313.

[0313] More specifically, the buffer member 314 is in the shape of a thin sheet, and the buffer member 314 includes a first side surface 3141 and a second side surface 3142 that are arranged opposite to each other and parallel to each other. The first side surface 3141 is suitable for attaching to the actuating assembly 32, and the second side surface 3142 is suitable for attaching to the structural member 313. The structural member 313 includes a third side surface 3131 corresponding to the second side surface 3142, and the third side surface 3131 is parallel to the outer wall of the fixing member 10, so that the actuating assembly 32 can be flatly fitted and fixed on the pre-stressing assembly 31, which is conducive to maintaining the parallelism of the actuating assembly 32 relative to the movable member 20 and the fixed member 10, so that the actuating assembly 32 is arranged in parallel between the movable member 20 and the fixed member 10.

[0314] In some embodiments, the structural member 313 is connected to the outer side wall of the fixing member 10 by gluing, clamping, welding, hot riveting, or fastener connection.

[0315] In some embodiments, in order to improve the driving performance of the piezoelectric motor, the piezoelectric vibrator 322 can be made of piezoelectric ceramic material or piezoelectric single crystal material. The piezoelectric vibrator 322 can be a single-layer ceramic body or a single-layer single crystal, or a multi-layer ceramic body or a multi-layer single crystal, for example, lead zirconate titanate (PZT)-based piezoelectric ceramics, potassium sodium niobate (KNN)-based piezoelectric ceramics, barium titanate (BT)-based piezoelectric ceramics, lead magnesium niobate-lead indium niobate (PMN-PT)-based piezoelectric single crystals, etc.

[0316] In some embodiments, the friction head 323 is made of wear-resistant materials, for example, it can be made of various high-hardness wear-resistant ceramic materials, such as aluminum oxide, zirconium oxide, silicon carbide ceramics, or high-wear-resistant metal materials, carbon fiber materials, or composite materials of ceramics, metal particles and polymers, etc., so as to improve the wear resistance of the friction head 323, which is beneficial to increase the friction force between the movable part 20 and the friction head 323, that is, it is beneficial to increase the driving force F, and due to its wear resistance, it is beneficial to extend the service life of the friction head 323.

[0317] Conversely, in some embodiments, a wear-resistant portion is provided on the movable part 20, and the friction head 323 contacts the wear-resistant portion. Specifically, the wear-resistant portion can be a wear-resistant coating, or a friction-resistant plate 29 assembled on the movable part 20, or an uneven surface of the movable part 20, etc., which can achieve a friction-resistant structure. The provision of the wear-resistant portion is beneficial to increasing the friction between the movable part 20 and the friction head 323, that is, it is beneficial to increasing the driving force F, and because of its wear resistance, it is beneficial to extend the service life.

[0318] Furthermore, when the wear-resistant part is set as a friction-resistant plate 29, it can be fixed to the movable part 20 by bonding, fastener connection, insert injection molding, etc. to form an integrated force-bearing structure with the movable part 20, and referring to the material of the friction head 323, the friction-resistant plate 29 can be made of the same or different wear-resistant material as the friction head 323.

[0319] It should be understood that the present application does not impose any specific limitations on the specific shapes of the friction head 323 and the friction-resistant plate 29. In specific embodiments, the friction head 323 can be shaped like a sphere, hemisphere, cuboid, platform, cylinder, semi-cylinder, etc., and the friction-resistant plate 29 can be in the form of a sheet or block. In this embodiment, the friction head 323 is cylindrical and the friction-resistant plate 29 is sheet-shaped. The line contact between the friction head 323 and the wear-resistant portion of the movable part 20 results in greater friction than point contact, resulting in a greater driving force F and, in other words, a better driving effect.

[0320] In some embodiments, the friction head 323 and the piezoelectric vibrator 322 can be an integrated structure or a detachable structure. The friction head 323 and the piezoelectric vibrator 322 can be fixed to the piezoelectric vibrator 322 by bonding, snapping, nesting, welding or fastener connection. The friction head 323 and the piezoelectric vibrator 322 are in surface contact to ensure the connection strength. The friction head 323 can produce obvious movement with the deformation of the piezoelectric vibrator 322.

[0321] In some embodiments, the number of friction heads 323 can be one or two or more. For example, in this embodiment, two friction heads 323 are provided on the side of the piezoelectric vibrator 322 facing the movable member 20, and the two friction heads 323 are spaced apart along the central axis O.

[0322] The present application can also provide a camera module, which includes an optical lens, a photosensitive component, and the above-mentioned driving mechanism. The optical lens is arranged on the movable part 20, and the photosensitive component is arranged relative to the optical lens. Since the movable part 20 equipped with the optical lens can be adjusted smoothly, it is conducive to realizing the focusing function or anti-shake function, thereby improving the imaging quality.

[0323] The present application provides a driving mechanism for a camera module, which includes a fixed frame 10, a movable carrier 20, a driving assembly 30 and a guiding assembly 40. The movable carrier 20 is movably connected to the fixed frame 10, and the driving assembly 30 is connected to the fixed frame 10, while abutting against the movable carrier 20 and providing a pre-pressure P. When the driving assembly 30 receives a driving signal, it can rub against the movable carrier 20 under the action of the pre-pressure P, thereby driving the movable carrier 20 to move. The guiding assembly 40 is arranged between the fixed frame 10 and the movable carrier 20, so that there is a fixed gap between the opposing surfaces of the fixed frame 10 and the movable carrier 20, that is, there is a first gap 113 between the contact surface 21 and the support surface 11, which can reduce the friction force on the movable carrier 20 when it moves relative to the fixed frame 10.

[0324] As shown in FIG. 19 , in the present application, the driving mechanism has a central axis O, and the movable carrier 20 is movably disposed in the fixed frame 10 and is adapted to move along the central axis O direction.

[0325] In this embodiment, the movable carrier 20 is movably arranged in the fixed frame 10, and an optical lens is carried on the movable carrier 20. The optical lens is not shown in the figure. The optical lens has an optical axis, and the direction of the central axis O is parallel to the optical axis direction of the optical lens. The movable carrier 20 can move along the optical axis relative to the fixed frame 10, thereby driving the optical lens to move along the optical axis direction to realize the optical focusing function.

[0326] In some other embodiments, the movable carrier 20 may be movable relative to the fixed frame 10 in a direction perpendicular to the optical axis, thereby realizing an optical image stabilization function.

[0327] In some embodiments, as shown in Figures 23 and 24, the driving component 30 is specifically implemented as a piezoelectric motor. The piezoelectric motor is a motor with fast response, large driving force and high driving precision, which can be used in the camera module. Specifically, the driving component 30 includes a pre-stressing component 31 and an actuating component 32. The pre-stressing component 31 is connected to the fixed frame 10, and the actuating component 32 is connected to the pre-stressing component 31. The pre-stressing component 31 provides a pre-pressure P perpendicular to the direction of the central axis O to the actuating component 32, so that the actuating component 32 abuts against one side of the movable carrier 20, and then the actuating component 32 provides a driving force F to the movable carrier 20 to guide the movable carrier 20 to move along the direction of the central axis O.

[0328] Specifically, in some embodiments, the actuating assembly 32 includes a piezoelectric vibrator 322 and a friction head 323. The piezoelectric vibrator 322 is connected to the preload assembly 31. The friction head 323 is fixed to the side of the piezoelectric vibrator 322 facing the movable carrier 20. Under the action of the preload P, the friction head 323 abuts the side wall of the movable carrier 20. That is, the friction head 323 and the preload assembly 31 are respectively arranged on opposite sides of the piezoelectric vibrator 322. The high-frequency, micro-amplitude vibration of the piezoelectric vibrator 322 causes the friction head 323 to move, and the friction between the friction head 323 and the outer wall of the movable carrier 20 drives the movable carrier 20 to move linearly along the central axis O. In other words, the driving force F can actually be understood as the friction force exerted by the friction head 323 on the movable carrier 20.

[0329] In some embodiments, the actuator assembly 32 also includes a piezoelectric circuit board 321, which is specifically a flexible circuit board, i.e., an FPC. The piezoelectric circuit board 321 is connected to the piezoelectric vibrator 322 to power the piezoelectric vibrator 322. Specifically, the piezoelectric circuit board 321 can be arranged on the side of the piezoelectric vibrator 322 facing away from the movable carrier 20, and the piezoelectric circuit board 321 can be arranged between the piezoelectric vibrator 322 and the pre-pressing assembly 31.

[0330] In some embodiments, the pre-pressing component 31 is disposed on the side of the piezoelectric vibrator 322 facing away from the movable carrier 20 to provide a pre-pressing force P toward the movable carrier 20 to the friction head 323 disposed on the side of the piezoelectric vibrator 322 facing the movable carrier 20 .

[0331] The guide assembly 40 is disposed between the movable carrier 20 and the fixed frame 10. One side of the guide assembly 40 abuts the fixed frame 10, and the other side abuts the movable carrier 20. The guide assembly 40 applies a support force N perpendicular to the central axis O to the movable carrier 20. If the movable carrier 20 and the fixed frame 10 were in surface contact, the movable carrier 20 would experience significant frictional resistance during movement, affecting the driving effect. The guide assembly 40 can change the contact method between the movable carrier 20 and the fixed frame 10, such as point contact or line contact, thereby reducing the area of ​​frictional contact between the movable carrier 20 and the fixed frame 10, thereby reducing the frictional force experienced by the movable carrier 20 relative to the fixed frame 10.

[0332] It should be understood that in one embodiment of the present application, as shown in Figures 20 and 22, the guide assembly 40 can be implemented as a ball 43, and the guide assemblies 40 on both sides each include at least one ball 43. The multiple balls 43 are clamped between the movable carrier 20 and the fixed frame 10, and the balls 43 are in point contact with the movable carrier 20 and the fixed frame 10. In another embodiment of the present application, considering that 1) the balls 43 are in point contact with the movable carrier 20 and the fixed frame 10, when the movable carrier 20 tilts, a large inclination angle may be generated between the movable carrier 20 and the balls 43, causing the balls 43 to get stuck and sliding friction to occur; 2) the balls 43 may switch unstably between the rolling state and the sliding state during movement, increasing the risk of the movable carrier 20 getting stuck; 3) the movable carrier 20 and the balls 43 may fall off, or debris generated by friction, impact, or other reasons between the balls 43, the movable carrier 20, and the fixed frame 10 may cause the balls 43 to get stuck, thereby causing the movable carrier 20 to get stuck. These situations will make the movable carrier 20 unable to move further, affecting the focusing effect. To this end, the guide assembly 40 can be implemented as a guide rod 44, which is shown by a dotted line in Figure 22. The guide rod 44 is clamped between the movable carrier 20 and the fixed frame 10. The guide rod 44 is in line contact with the movable carrier 20 and the fixed frame 10, which reduces the risk of jamming compared to the ball bearing 43.

[0333] It can be understood that, as shown in Figure 18, the piezoelectric vibrator 322 causes the friction head 323 to move by deformation, and when the piezoelectric vibrator 322 is deformed, the angle between the friction head 323 and the abutment surface of the movable carrier 20 changes accordingly, resulting in the pre-pressure P being difficult to always act perpendicularly on the side wall of the movable carrier 20, but under certain circumstances, having a certain inclination relative to the plane where the side wall of the movable carrier 20 is located. At the same time, when the hardness of the pre-pressure component 31 is relatively small, the pre-pressure component 31 may bend to a certain extent due to the deformation of the piezoelectric vibrator 322, resulting in the direction of the pre-pressure P relative to the angle of the abutment surface changing. That is to say, under certain circumstances, the direction of the pre-pressure P is inclined relative to the plane where the side wall of the movable carrier 20 is located. In these cases, when the actuating component 32 drives the movable carrier 20 to move, it is easy to cause the movable carrier 20 to tilt.

[0334] In particular, in some embodiments, as shown in FIG17 , guide assemblies 40 are disposed at two diagonal positions on the movable carrier 20 . At this time, the support force N exerted by the fixed frame 10 on the movable carrier 20 through the guide assemblies 40 is opposite to the preload force P. These two forces cooperate to clamp the movable carrier 20 between the guide assemblies 40 and the fixed frame 10 , allowing the movable carrier 20 to move along the central axis O under the action of the driving force F of the actuating assembly 32 . That is, the driving assembly 30 and the guide assembly 40 cooperate to guide the movable carrier 20 to move along the central axis O. From a top view, the guide assemblies 40 and the actuating assembly 32 disposed at the two diagonal positions of the movable carrier 20 form a three-point arrangement on the side wall of the movable carrier 20 . The distance from the center of frictional contact between the actuator assembly 32 and the movable carrier 20 to the line connecting the guide assemblies 40 disposed at two diagonal positions is the lever arm x. The magnitude of the overturning moment M of the movable carrier 20 at the diagonal position is positively correlated with the magnitude of the lever arm x. The three-point arrangement results in a larger lever arm x and a larger overturning moment M. When the movable carrier 20 is driven by the actuator assembly 32 to move along the central axis O, the movable carrier 20 will produce a larger inclination angle, causing the movable carrier 20 to tilt, affecting the speed and effect of optical focusing. In addition, in this structure where the guide assemblies 40 are disposed at diagonals, the two diagonal guide assemblies 40 may generate uncertain friction, causing the movable carrier 20's travel and speed to fall short of the standard. Furthermore, the diagonal guide assemblies 40 may squeeze the drive assembly 30, causing the friction of the movable carrier 20 caused by the guide assemblies 40 to increase when the movable carrier 20 moves.

[0335] Furthermore, when the guide assembly 40 is implemented as a ball 43, there is a possibility that the movable carrier 20 and the ball 43 may become stuck, or the movable carrier 20 and the ball 43 may fall off, making the movable carrier 20 unable to move further and affecting the focusing effect. Of course, when the guide assembly 40 is implemented as a guide rod 44, the situation will be better than that of the ball 43, but the tilt of the movable carrier 20 will also affect the optical focusing effect.

[0336] To address the aforementioned issues, the present application arranges the guide assembly 40 and the drive assembly 30 on the same side of the movable carrier 20. Compared to the arrangement of two guide assemblies 40 and the friction head 323 of the actuating assembly 32 at three points on the sidewall of the movable carrier 20, the arrangement of the guide assembly 40 and the drive assembly 30 on the same side of the movable carrier 20 reduces the distance from the friction head 323 of the actuating assembly 32 to the line connecting the two guide assemblies 40, that is, x becomes smaller, thereby reducing the torque M. When the movable carrier 20 is driven by the actuating assembly 32 to move along the central axis O, the inclination angle of the movable carrier 20 is small, which reduces the risk of the movable carrier 20 tilting and avoids affecting the optical focusing effect.

[0337] However, it is inevitable that, under the condition of tilting due to the presence of the assembly gap, the movable carrier 20 is still likely to tilt. Here, the assembly gap refers to the gap reserved so that the movable carrier 20 and the guide assembly 40 can be assembled in the fixed frame 10, that is, the gap between the fixed frame 10 and the movable carrier 20. This assembly gap allows the movable carrier 20 and the guide assembly 40 to be assembled in the fixed frame 10, but also leaves room for the movable carrier 20 to tilt. In some cases, due to manufacturing tolerances of the fixed frame 10, the movable carrier 20, and the guide assembly 40, as well as other factors during the processing and assembly process, the assembly between the guide assembly 40 and the fixed frame 10 and the movable carrier 20 may not be tight enough, resulting in a greater possibility of tilting the movable carrier 20. Once the movable carrier 20 tilts to a certain extent, the guide assembly 40 will still be stuck between the movable carrier 20 and the fixed frame 10, making it impossible for the movable carrier 20 to move to achieve the optical focus function.

[0338] To this end, the present application further improves the structure of the driving mechanism and proposes a driving mechanism for a camera module: as shown in Figures 19 to 35, it includes a fixed frame 10, a movable carrier 20, a driving component 30, a guide component 40 and at least one group of magnetic components 50, the fixed frame 10 includes a supporting surface 11, the movable carrier 20 is movably arranged on the fixed frame 10, the movable carrier 20 includes a contact surface 21, the supporting surface 11 and the contact surface 21 are arranged opposite to each other, the guide component 40 is located between the supporting surface 11 and the contact surface 21, so that a first gap 113 is maintained between the supporting surface 11 and the contact surface 21, the driving component 30 is connected to the fixed frame 10, and at the same time abuts against the movable carrier 20 and applies a pre-pressure P to the movable carrier 20, the pre-pressure P makes the contact surface 21 have a tendency to move away from the supporting surface 11, and the magnetic The suction component 50 includes a first magnetic component 52 and a second magnetic component 51. The first magnetic component 52 is arranged on the fixed frame 10, and the second magnetic component 51 is arranged on the movable carrier 20. The interaction between the first magnetic component 52 and the second magnetic component 51 applies a magnetic force to the movable carrier 20. The direction of the magnetic force acting on the movable carrier 20 is opposite to the direction of the prepressure P, and the magnetic force is greater than the prepressure P, so as to adsorb the contact surface 21 of the movable carrier 20 to the support surface 11 of the fixed frame 10, and the guide component 40 is clamped between the support surface 11 and the contact surface 21. That is, the first magnetic component 52 and the second magnetic component 51 can attract each other to generate a sufficiently large magnetic force, so that the contact surface 21 and the support surface 11 remain in contact with the guide component 40, thereby keeping the contact surface 21 parallel to the support surface 11.

[0339] Among them, the interaction between the first magnetic component 52 and the second magnetic component 51 to apply a magnetic force to the movable carrier 20 can be understood as: the force between the first magnetic component 52 and the second magnetic component 51 is mutual, and while the first magnetic component 52 generates a force on the second magnetic component 51, it is also subject to a reaction force from the second magnetic component 51. The term "magnetic force" in this application generally refers to the force of the first magnetic component 52 on the second magnetic component 51. Since the second magnetic component 51 is fixed on the movable carrier 20, the force of the first magnetic component 52 on the second magnetic component 51 is applied to the movable carrier 20, that is, the force exerted by the first magnetic component 52 on the movable carrier 20.

[0340] The magnetic attraction force of the magnetic attraction component 50 causes the contact surface 21 of the movable carrier 20 to have a tendency to move toward the support surface 11 of the fixed frame 10, so that the contact surface 21 and the support surface 11 can cooperate to clamp the guide component 40, and the clamping is stable and reliable, thereby achieving a tight assembly between the fixed frame 10, the movable carrier 20, and the guide component 40. Since the magnetic attraction force is in the opposite direction to the pre-pressure P and the magnetic attraction force is greater than the pre-pressure P, the magnetic attraction force can enable the movable carrier 20 to be supported parallel to the fixed frame 10 through the guide assembly 40. Even when the pre-pressure P is tilted, the magnetic attraction force can offset the influence of the tilted pre-pressure P, and keep the relative surfaces of the movable carrier 20 and the fixed frame 10 parallel to each other; when the movable carrier 20 tilts under the action of the pre-pressure P of the driving assembly 30, the magnetic attraction force can act on the movable carrier 20 so that the position of the movable carrier 20 is corrected in time, thereby maintaining the mutual parallelism between the support surface 11 and the contact surface 21, that is, reducing the risk of the movable carrier 20 tilting during movement and reducing the risk of the guide assembly 40 getting stuck, especially solving the problem of difficulty in rolling and getting stuck when the guide assembly 40 is a ball 43, so that the movable carrier 20 can move smoothly along the central axis O direction of the driving assembly 30, and the magnetic attraction assembly 50 has a simple structure and low cost.

[0341] It should be added that, in some embodiments, when the guide assembly 40 is set to multiple guide parts, due to the action of the magnetic assembly 50, the support surface 11 and the contact surface 21 can clamp each guide part, which is beneficial to improve the parallelism between different guide parts, thereby reducing the assembly tolerance of the drive mechanism and ensuring the stable operation of the drive mechanism.

[0342] Furthermore, based on the fact that the magnetic attraction component 50 is provided to prevent and correct the tilt of the movable carrier 20 , the present application arranges the guide component 40 and the driving component 30 on the same side of the movable carrier 20 .

[0343] In this embodiment, the guide assembly 40 and the drive assembly 30 are arranged on the same side of the movable carrier 20, and are specifically implemented as follows: the fixed frame 10 has a first frame side portion 12, the movable carrier 20 has a first carrier side portion 22, the first frame side portion 12 and the first carrier side portion 22 are arranged opposite to each other, the inner surface of the first frame side portion 12 forms a support surface 11, and the outer surface of the first carrier side portion 22 forms a contact surface 21, the guide assembly 40 and the drive assembly 30 are both arranged between the first frame side portion 12 and the first carrier side portion 22. It can be seen from Figure 21 that the guide assembly 40 and the drive assembly 30 are basically arranged in the same straight line. At this time, the distance from the friction head 323 to the connecting line between the two guide assemblies 40, that is, x, is much smaller than x when the two guide assemblies 40 are arranged at two diagonal corners of the movable carrier 20, that is, the torque M becomes smaller, so that the risk of tilting of the movable carrier 20 is greatly reduced, thereby avoiding affecting the optical focusing effect.

[0344] It can be understood that in this embodiment, the pre-pressure P causes the first carrier side portion 22 to have a movement tendency away from the first frame side portion 12, that is, the contact surface 21 has a tendency to move away from the support surface 11, and the magnetic force acts on the movable carrier 20, and the movable carrier 20 is able to overcome the pre-pressure P, so that the first carrier side portion 22 has a movement tendency to move closer to the first frame side portion 12, that is, the contact surface 21 of the movable carrier 20 is adsorbed to the support surface 11 of the fixed frame 10, and the guide assembly 40 is able to be clamped between the support surface 11 and the contact surface 21 to support the movable carrier 20.

[0345] In this embodiment, the drive assembly 30 includes a preload assembly 31 and an actuating assembly 32. The preload assembly 31 is connected to the fixed frame 10, and the actuating assembly 32 is connected to the preload assembly 31. The preload assembly 31 applies a preload force P to the actuating assembly 32, causing the friction head 323 of the actuating assembly 32 to abut against the outer surface of the first carrier side portion 22, thereby applying the preload force P to the outer surface of the first carrier side portion 22. In one specific example, a piezoelectric circuit board 321 is disposed between the piezoelectric vibrator 322 and the preload assembly 31. The preload assembly 31 is fixed to the fixed frame 10. The piezoelectric vibrator 322 is pressed against one side of the movable carrier 20 by the preload force provided by the preload assembly 31.

[0346] The guide assembly 40 includes a first guide member 41 and a second guide member 42 . The first guide member 41 and the second guide member 42 are respectively disposed on both sides of the driving assembly 30 , thereby reducing the risk of the movable carrier 20 rotating relative to the frame around the optical axis.

[0347] In some embodiments, as shown in Figures 25 to 27, the movable carrier 20 and the fixed frame 10 are substantially square, and the overall shape of the movable carrier 20 and the fixed frame 10 is regular and easy to process. Specifically, the movable carrier 20 includes a first carrier side portion 22, a second carrier side portion 23, a third carrier side portion 24, and a fourth carrier side portion 25 that are sequentially connected, and the fixed frame 10 includes a first frame side portion 12, a second frame side portion 13, a third frame side portion 14, and a fourth frame side portion 15 that correspond to each other. The driving assembly 30 is arranged on the first carrier side portion 22 and the first The first guide 41 and the second guide 42 are also arranged between the first carrier side 22 and the first frame side 12. The first guide 41 is arranged on the side of the drive assembly 30 relatively close to the fourth carrier side 25, and the second guide 42 is arranged on the side of the drive assembly 30 relatively close to the second carrier side 23. The first guide 41 and the second guide 42 are symmetrically arranged on both sides of the drive assembly 30 to maintain force balance on both sides of the movable carrier 20 and reduce the risk of rotation of the movable carrier 20. Of course, the shapes of the movable carrier 20 and the fixed frame 10 in the present application include but are not limited to square.

[0348] In some embodiments, as shown in FIG27 , the driving assembly 30 , the guide assembly 40 and the magnetic assembly 50 are all arranged on the same side of the movable carrier 20 . The relatively concentrated arrangement of the several structures applying force to the movable carrier 20 is conducive to maintaining a compact structure.

[0349] Furthermore, in this embodiment, the first magnetic component 52 is arranged on the first frame side 12, and the second magnetic component 51 is arranged on the first carrier side 22. The spacing distance between the first magnetic component 52 and the second magnetic component 51 is small, which is conducive to the interaction between the two to generate a stronger magnetic attraction force.

[0350] In some embodiments, the magnetic component 50 includes a first group of magnetic components 54 and a second group of magnetic components 55 arranged relative to the driving component 30. The first group of magnetic components 54 and the second group of magnetic components 55 are respectively arranged on both sides of the driving component 30, and can provide magnetic attraction force to the movable carrier 20 from both sides of the driving component 30, respectively, and the magnetic attraction force has a better effect.

[0351] In some embodiments, the magnetic attraction component 50 is arranged adjacent to the guide component 40. Specifically, the first group of magnetic attraction components 54 is arranged adjacent to the first guide member 41, and the second group of magnetic attraction components 55 is arranged adjacent to the second guide member 42. The spacing distance between the magnetic attraction force and the guide component 40 is relatively small, and the magnetic attraction force can act more directly on the guide component 40, which is beneficial for the contact surface 21 and the support surface 11 to clamp the guide component 40 from both sides to keep the movable carrier 20 parallel.

[0352] In a specific embodiment, as shown in FIG27 , the first group of magnetic components 54 is disposed on a side of the first guide member 41 away from the drive assembly 30, and the second group of magnetic components 55 is disposed on a side of the second guide member 42 away from the drive assembly 30. Furthermore, in a specific example, the first guide member 41 is located between the first group of magnetic components 54 and the drive assembly 30, and the second guide member 42 is located between the second group of magnetic components 55 and the drive assembly 30. That is, the distance between the first guide member 41 and the first group of magnetic components 54 is equal to the distance between the first guide member 41 and the drive assembly 30, and the distance between the second guide member 42 and the second group of magnetic components 55 is equal to the distance between the second guide member 42 and the drive assembly 30. This can make the force distribution in the drive mechanism more balanced and the drive mechanism more stable.

[0353] In another specific embodiment, as shown in FIG. 33 , the first set of magnetic components 54 is disposed between the first guide member 41 and the driving component 30 , and the second set of magnetic components is disposed between the second guide member 42 and the driving component 30 .

[0354] In another specific embodiment, as shown in FIG34 , along a direction parallel to the preload force P, the first magnetic member 52 and the second magnetic member 51 in the first magnetic assembly 54 are respectively disposed on either side of the first guide member 41, and the first magnetic member 52 and the second magnetic member 51 in the second magnetic assembly 55 are respectively disposed on either side of the second guide member 42. The first magnetic member 52 and the second magnetic member 51 in the first magnetic assembly 54 attract each other, while the first magnetic member 52 and the second magnetic member 51 in the second magnetic assembly 55 attract each other. That is, the first magnetic assembly 54 and the first guide member 41 are collinearly disposed, while the second magnetic assembly 55 and the second guide member 42 are collinearly disposed, facilitating the direct application of magnetic attraction force to the guide assembly 40, thereby clamping the guide assembly 40.

[0355] In some other embodiments, the magnetic component 50 is arranged adjacent to the driving component 30 and is only provided as a pair. For example, the present application can also provide another specific embodiment, which is different from the above three specific embodiments. In this embodiment, as shown in Figure 35, the magnetic component 50 is provided as a group, and along the direction of the pre-pressure P, the first magnetic component 52 and the second magnetic component 51 in the group of magnetic components 50 are respectively provided on both sides of the driving component 30. In other words, the magnetic attraction force is collinear with the pre-pressure P and in opposite directions. There is no need to worry about the movable carrier 20 tilting to one side due to the unequal magnetic attraction forces on both sides. After the magnetic attraction force is partially offset by the pre-pressure P, it acts on the movable carrier 20, so that the movable carrier 20 can overcome the pre-pressure P and move closer to the first frame side 12, thereby clamping the guide component 40 between the support surface 11 and the contact surface 21.

[0356] In the above four specific embodiments, the driving assembly 30 includes a pre-stressing assembly 31 and an actuating assembly 32. The pre-stressing assembly 31 is connected to the fixed frame 10, and the actuating assembly 32 is connected to the pre-stressing assembly 31. The pre-stressing assembly 31 provides a pre-stressing pressure P to the actuating assembly 32, so that the friction head 323 of the actuating assembly 32 abuts against the outer surface of the first carrier side 22, and applies the pre-stressing pressure P to the movable carrier 20.

[0357] Furthermore, when the magnetic components 50 are set as two groups, the first group of magnetic components 54 and the second group of magnetic components 55 are symmetrically arranged about the central axis O of the driving component 30, and the magnetic force generated by the first group of magnetic components 54 is equal to the magnetic force generated by the second group of magnetic components 55, so as to provide equal magnetic forces to both sides of the movable carrier 20, thereby avoiding the movable carrier 20 from tilting to one side due to the different magnitudes of the magnetic forces on both sides, thereby avoiding affecting the optical focus and / or optical image stabilization effect.

[0358] When the magnetic component 50 is set as only one group, as an improvement, the pre-stressing component 31 forms a first magnetic component 52. In other words, the first magnetic component 52 can also serve as a part of the pre-stressing component 31. In this way, the number of components can be reduced and it is also suitable for reducing the size of the entire driving mechanism.

[0359] It can be understood that, in some embodiments, the first magnetic member 52 is a magnet having magnetic attraction, and the second magnetic member 51 is an object suitable for being attracted by the magnet.

[0360] In other embodiments, the second magnetic member 51 is a magnet with magnetic attraction, such as a permanent magnet, and the first magnetic member 52 is an object suitable for being attracted by the magnet.

[0361] Among them, the magnet can be a metal alloy permanent magnet, such as neodymium iron boron permanent magnet, aluminum nickel cobalt permanent magnet, or ferrite permanent magnet, or rare earth permanent magnet. Objects suitable for being adsorbed by the magnet include but are not limited to magnets and metal sheets, such as low-cost iron sheets. The second magnetic attraction component 51 and the first magnetic attraction component 52 can attract each other, and their specific materials are not limited.

[0362] The first magnetic member 52 on the preloading assembly 31 can be configured as an object suitable for being attracted by a magnet, and the second magnetic member 51 on the movable carrier 20 can be configured as a magnet that directly attracts the preloading assembly 31 to generate a magnetic attraction force. The specific structures of the preloading assembly 31 and the first magnetic member 52 will be further explained below.

[0363] The middle portion of the second magnetic member 51 is disposed opposite to the friction head 323 to prevent the magnetic attraction force from being eccentric relative to the pre-pressure P and causing the movable carrier 20 to rotate and tilt around the optical axis.

[0364] It is worth mentioning that, in some embodiments, the present application also takes into account that the movable carrier 20 can move relative to the fixed frame 10. In order to ensure that there is always a certain magnetic attraction between the second magnetic component 51 and the first magnetic component 52 during the movement of the movable carrier 20, the first magnetic component 52 and the second magnetic component 51 are arranged parallel to each other, and both are extended along the movement direction of the movable carrier 20. Such a structural arrangement makes the magnetic attraction perpendicular to the movement direction of the movable carrier 20. In other words, the magnetic attraction is perpendicular to the abutment surface between the guide assembly 40 and the movable carrier 20, that is, the contact surface 21, thereby reducing the risk of the movable carrier 20 tilting.

[0365] Furthermore, as shown in Figure 28, along the movement direction of the movable carrier 20, that is, along the direction of the central axis O, the length of the first magnetic member 52 is L, and the length of the second magnetic member 51 is Y, L>Y, so that when the movable carrier 20 moves relative to the frame, the magnetic attraction force between the first magnetic member 52 and the second magnetic member 51 can still be perpendicular to the contact surface 21.

[0366] Furthermore, the travel range of the movable carrier 20 under the driving of the driving assembly 30 is D, L≥Y+D, so that during the driving process of the driving assembly 30 , the magnetic attraction force can maintain a state of being perpendicular to the contact surface 21 .

[0367] It should be pointed out here that the size of the fixed frame 10 is larger than that of the movable carrier 20, especially the extension length of the fixed frame 10 along the central axis O is larger than the extension length of the movable carrier 20 along the central axis O. Therefore, in the specific embodiment, the setting of L≥Y+D is more reasonable, and the possibility of Y≥L+D is smaller.

[0368] Furthermore, in some embodiments, the first magnetic member 52 and / or the second magnetic member 51 are magnets, and the drive mechanism further includes a magnetic sensing member 53, which is disposed relative to at least one of the magnets, thereby detecting changes in the magnetic field to determine the position of the movable carrier 20. For example, when the second magnetic member 51 on the movable carrier 20 is a magnet, the magnetic sensing member 53 can be disposed on the fixed frame 10 relative to the second magnetic member 51 to detect changes in the magnetic field.

[0369] In this embodiment, as shown in Figure 27, the magnetic induction component 53 and the second magnetic attraction component 51 are arranged opposite to each other in a direction parallel to the preload force P. The second magnetic attraction component 51 is a magnet. When the movable carrier 20 moves, the relative position between the magnetic induction component 53 and the magnet changes, and the strength of the magnetic field sensed by the magnetic induction component 53 changes, so that the current position of the movable carrier 20 can be determined, which facilitates the control of the drive component 30 to adjust the position of the movable carrier 20.

[0370] Specifically, the magnetic induction element 53 is a Hall induction sensor, a magnetoelectric induction sensor, or a magnetoresistive effect sensor, such as a magnetic sensitive element TMR using the tunnel magnetoresistive effect, or a chip integrated with a magnetic induction function, or other elements capable of sensing changes in magnetic field.

[0371] In some embodiments, there is one magnetic induction member 53 , which is arranged relative to a magnet in the magnetic attraction component 50 . In some other embodiments, there are two magnetic induction members 53 , which are arranged relative to the magnets in the first group of magnetic attraction components 54 and the second group of magnetic attraction components 55 , respectively.

[0372] The magnetic induction component 53 can be specifically fixed on the first carrier side 22 or the first frame, or can be set on the second carrier side 23, or the fourth carrier side 25, or the second frame side 13, or the fourth frame side 15, as long as it can be set relative to the magnet in the magnetic attraction component 50 to sense the magnetic field changes.

[0373] More specifically, the first magnetic member 52 , the second magnetic member 51 , and the magnetic induction member 53 can be fixed to the corresponding movable carrier 20 or the fixed frame 10 by injection molding, plugging, snapping, bonding, welding, or other connection methods.

[0374] In one specific embodiment, the first magnetic member 52 is attached and fixed to the outer surface of the first frame side portion 12, and the second magnetic member 51 is disposed on the outer surface of the first carrier side portion 22. A first mounting groove 263 is provided on the first carrier side portion 22 of the movable carrier 20, and the second magnetic member 51 is mounted within the first mounting groove 263. The second magnetic member 51 does not occupy additional space, which helps maintain a compact structure, and is shielded and protected by the first mounting groove 263. The first mounting groove 263 can be a through groove extending along the optical axis through both ends of the first carrier side portion 22, or a groove with both ends closed along the optical axis.

[0375] The connection method of the second magnetic member 51, and when connected by a mounting groove, the shape, groove depth, groove width, etc. of the first mounting groove 263 can be adaptively adjusted according to the specific structure of the second magnetic member 51 and the first carrier side portion 22. The same applies to the first magnetic member 52. It can be understood that when the second magnetic member 51 is fixedly connected by using a mounting groove on the outer surface of the first carrier side wall, it is necessary to avoid the guide assembly 40 to avoid affecting the contact between the contact surface 21 on the first carrier side wall and the guide assembly 40. When the second magnetic member 51 is embedded in the first carrier side portion 22 using an injection molding process, or when the second magnetic member 51 is inserted into the first carrier side portion 22 from both ends of the first carrier side portion 22 along the optical axis, the second magnetic member 51 does not need to be arranged to avoid the guide assembly 40. The same applies to the arrangement position of the first magnetic member 52 relative to the guide assembly 40.

[0376] The first magnetic member 52 and the second magnetic member 51 are respectively configured in a regular block or sheet shape, with a simple structure and easy processing and forming, and convenient for opening mounting grooves of corresponding shapes.

[0377] Similarly, in some embodiments, a second mounting slot is provided on the movable carrier 20 or the fixed frame 10, and the magnetic sensing element 53 is disposed within the second mounting slot. This provides shielding and protection for the magnetic sensing element, and also eliminates the need for the magnetic sensing element 53 to occupy additional space, thereby maintaining a compact structure for the entire drive mechanism.

[0378] As an improvement, in some embodiments, as shown in Figures 25-27, the fixed frame 10 is provided with an inner protrusion 16, which is formed by protruding inward from the inner side wall of the fixed frame 10, and the movable carrier 20 is provided with an outer protrusion 26, which is formed by protruding outward from the outer side wall of the movable carrier 20. The outer protrusion 26 is arranged opposite to the inner protrusion 16, and a second gap 191 is formed between the two. The width of the second gap 191 is smaller than the width of other gaps between the movable carrier 20 and the fixed frame 10. Therefore, when the driving assembly 30 is affected by an external force and the movable carrier 20 tilts relative to the frame, due to the smaller second gap 191, the inner protrusion 16 and the outer protrusion 26 collide with each other to prevent the tilt of the movable carrier 20 from further increasing and causing the entire driving mechanism to fail. It should be noted that the term "inward protrusion" here can be understood as protruding in a direction close to the driving assembly 30 or the central axis O, or as protruding in a direction close to the optical axis, while "outward protrusion" is exactly the opposite.

[0379] In this embodiment, the outer convex portion 26 and the inner convex portion 16 are respectively provided in two, the outer convex portion 26 includes a first outer convex portion 261 and a second outer convex portion 262, and the inner convex portion 16 includes a first inner convex portion 161 and a second inner convex portion 162, wherein the first outer convex portion 261 is arranged opposite to the first inner convex portion 161 and is arranged on one side of the driving component 30, and the second outer convex portion 262 is arranged opposite to the second inner convex portion 162 and is arranged on the other side of the driving component 30. The two sets of mutually matching outer convex portions 26 and inner convex portions 16 respectively limit the inclination of the movable carrier 20 from both sides of the driving component 30.

[0380] More specifically, the fixed frame 10 includes a second frame side portion 13 and a fourth frame side portion 15 respectively arranged at both ends of the first frame side portion 12, the inner surfaces of the second frame side portion 13 and the inner surfaces of the fourth frame side portion 15 respectively protrude inward to form an inner convex portion 16, and the movable carrier 20 includes a second carrier side portion 23 and a fourth carrier side portion 25 respectively arranged at both ends of the first carrier side portion 22, the outer surfaces of the second carrier side portion 23 and the outer surfaces of the fourth carrier side portion 25 respectively protrude outward to form an outer convex portion 26, the outer convex portion 26 is located between the inner convex portion 16 and the support surface 11, and a second gap 191 is provided between the side of the outer convex portion 26 facing away from the contact surface 21 and the side of the inner convex portion 16 facing the support surface 11. The width of the second gap 191 is smaller than the width of other gaps between the movable carrier 20 and the fixed frame 10, for example, smaller than the width of the first gap 113 between the contact surface 21 and the support surface 11, or the gap between the third carrier side portion 24 and the third frame side 14. Thus, when the drive assembly 30 is subjected to an external force, causing the movable carrier 20 to tilt relative to the frame, due to the smaller second gap 191, the side of the outer protrusion 26 facing away from the contact surface 21 and the side of the inner protrusion 16 facing the support surface 11 will collide before the other opposing surfaces between the movable carrier 20 and the fixed frame 10. In other words, the inner protrusion 16 and the outer protrusion 26 collide with each other to prevent the movable carrier 20 from tilting further and causing the entire drive mechanism to fail. It should be noted that the external force effect herein includes, but is not limited to, the case where the preload assembly 31 is configured as a spring and is bent, causing the preload force P to tilt.

[0381] Furthermore, the fixed frame 10 is provided with an external recess 17, which is formed outwardly from the inner surface of the second frame side portion 13 and the inner surface of the fourth frame side portion 15 of the fixed frame 10. The external recess 17 is connected to the internal protrusion 16 and cooperates to form a second groove 18, into which the external protrusion 26 is adapted to be inserted. Correspondingly, the movable carrier 20 is provided with an internal recess 27, which is formed inwardly from the outer surface of the second carrier side portion 23 and the outer surface of the fourth carrier side portion 25 of the movable carrier 20. The external protrusion 26 is connected to the internal recess 27 and cooperates to form a first groove 28, into which the internal protrusion 16 is adapted to be inserted. The provision of the internal recess 27 and the external recess 17 helps reduce the extension of the drive mechanism in a direction perpendicular to the optical axis and the vertical preload force P, maintaining a compact structure. Inward recess can be understood as recessing toward the drive assembly 30 or the central axis O, or toward the optical axis, while outward recessing is the opposite.

[0382] The outer recess 17 includes a first outer recess 171 connected to the first inner protrusion 161, and a second outer recess 172 connected to the second inner protrusion 162. The first outer recess 171 and the first inner protrusion 161 form a second groove 181, and the second outer recess 172 and the second inner protrusion 162 form a second groove 182. The first outer protrusion 261 is adapted to be inserted into the second groove 181, and the second outer protrusion 262 is adapted to be inserted into the second groove 182. The inner recess 27 includes a first inner recess 271 connected to the first outer protrusion 261, and a second inner recess 272 connected to the second outer protrusion 262. The first inner recess 271 and the first outer protrusion 261 form a first groove 281, and the second inner recess 272 and the second outer protrusion 262 form a first groove 282. The first inner protrusion 161 is adapted to be inserted into the first groove 281, and the second inner protrusion 162 is adapted to be inserted into the first groove 282.

[0383] In some embodiments, as shown in Figures 29 and 30 , guide grooves extending parallel to the central axis O are respectively provided on the support surface 11 and the contact surface 21. The guide assembly 40 extends parallel to the central axis O and is clamped and limited by the guide grooves on both sides. It is understood that the guide assembly 40 is continuously clamped in the guide grooves on both sides. When the movable carrier 20 moves along the central axis O, the guide assembly 40 is driven by the movable carrier 20 and, under the guidance of the guide grooves, moves in a direction parallel to the central axis O. During this movement, the guide assembly 40 cooperates with the guide grooves on both sides to limit the movement direction of the movable carrier 20 to a certain extent, preventing the movable carrier 20 from tilting relative to the central axis O and guiding the movable carrier 20 to move along the central axis O.

[0384] In some embodiments, a first guide groove 111 and a third guide groove 112 are spaced apart on the support surface 11, and a corresponding second guide groove 211 and a fourth guide groove 212 are provided on the contact surface 21. The first guide groove 111 and the second guide groove 211 cooperate to clamp the first guide member 41 therein and guide the first guide member 41 to move along the central axis O. The third guide groove 112 and the fourth guide groove 212 cooperate to clamp the second guide member 42 therein, and the first guide member 41 and the second guide member 42 maintain parallelism between the support surface 11 and the contact surface 21.

[0385] In some embodiments, the first guide groove 111 and the second guide groove 211 are a pair of V-shaped grooves with their notches facing each other, and the third guide groove 112 and the fourth guide groove 212 are a pair of V-shaped grooves with their notches facing each other. The first guide member 41 and the second guide member 42 support the movable carrier 20 from either side of the drive assembly 30, and cooperate with the two sets of guide grooves to guide the movable carrier 20 to move along the central axis O. In other words, the first guide member 41 and the second guide member 42 support and position the movable carrier 20.

[0386] However, if all first through fourth guide grooves 111, 212 are designed as V-shaped grooves, manufacturing tolerances within the movable carrier 20 and / or fixed frame 10 may result in a certain offset between the actual guide groove positions and the preset positions. During assembly, after aligning the V-shaped openings 192 of one set of guide grooves, the other pair of guide grooves may become misaligned, making alignment difficult. This can make it difficult to install either the first guide member 41 or the second guide member 42 between the two misaligned guide grooves. In other words, designating all guide grooves as V-shaped requires high machining precision and results in high manufacturing costs.

[0387] To this end, in some embodiments, the shape of the guide groove is improved so that the second guide member 42 can move in a direction perpendicular to the central axis O along the bottom of the third guide groove 112 and / or the bottom of the fourth guide groove 212 .

[0388] Specifically, in this embodiment, the first guide groove 111 and the second guide groove 211 are V-shaped grooves with their openings facing each other, and the third guide groove 112 and the fourth guide groove 212 are arranged with their openings facing each other. At least one of the grooves is a planar groove having a bottom parallel to the support surface 11, so as to allow the second guide member 42 therein to move along the bottom of the third guide groove 112 and / or the bottom of the fourth guide groove 212 in a direction perpendicular to the central axis O. The movable carrier 20 and the fixed frame 10 are supported and positioned by the V-shaped first and second guide grooves 111, 211, and the first guide member 41 within the V-shaped grooves. Due to manufacturing tolerances, when aligning the first guide groove 111 and the second guide groove 211, there may be a certain amount of misalignment between the third guide groove 112 and the fourth guide groove 212. However, since at least one of the two is a planar groove, the position of the second guide member 42 in the planar groove can be fine-tuned along the bottom of the planar groove, thereby resolving the problem of difficulty in assembling the second guide member 42 caused by misalignment between the third guide groove 112 and the fourth guide groove 212. The provision of the planar groove means that a certain distance deviation is allowed between the center of the planar groove and the center of the guide groove directly opposite it, that is, a certain range of manufacturing tolerances is allowed between the movable carrier 20 and the fixed frame 10, thereby reducing the precision requirements for the manufacturing of the movable carrier 20 and the fixed frame 10 and reducing the processing and assembly costs.

[0389] In some embodiments, one of the third guide groove 112 and the fourth guide groove 212 is a planar groove, and the other is a V-shaped groove. During assembly, the second guide member 42 can slide and fine-tune along the bottom of the planar groove and can be directly engaged with the V-shaped groove and retained by the V-shaped groove. The second guide member 42 supports the movable carrier 20, reducing processing requirements while also facilitating easier assembly and improving assembly efficiency.

[0390] In this embodiment, both the third guide groove 112 and the fourth guide groove 212 are planar grooves. During assembly, the second guide member 42 can be slid and fine-tuned along the bottoms of the third guide groove 112 and the fourth guide groove 212. That is, the second guide member 42 can be fine-tuned toward or away from the first guide member 41. The second guide member 42 supports the movable carrier 20. Compared to an embodiment in which only one of the guide grooves is a planar groove, this further reduces the machining accuracy requirements for the movable carrier 20 and / or the fixed frame 10. In particular, a certain range of machining tolerances can be allowed for the third guide groove 112 and the fourth guide groove 212.

[0391] In some other embodiments, the first guide groove 111 and the second guide groove 211 can also be square grooves or arc grooves. The specific shapes of the two are not limited, as long as they can just clamp the first guide member 41 to achieve the support and positioning functions. Similarly, the third guide groove 112 and the fourth guide groove 212 can also be set to other shapes, as long as they can achieve the support function, that is, as long as the second guide member 42 can be clamped between the contact surface 21 and the support surface 11.

[0392] In some embodiments, as shown in FIG22 , the guide assembly 40 is implemented as a ball 43. The guide assemblies 40 on both sides each include at least one ball 43, and the plurality of balls 43 are clamped between the movable carrier 20 and the fixed frame 10. In other embodiments, the guide assembly 40 is implemented as a guide rod 44, which is indicated by a dotted line in FIG22 . The guide rod 44 is clamped between the movable carrier 20 and the fixed frame 10. The guide rod 44 is in line contact with the movable carrier 20 and the fixed frame 10, which is less likely to become stuck than a structure in which the ball 43 is in point contact with the movable carrier 20 and the fixed frame 10.

[0393] This application further refines and supplements the structure related to the drive assembly 30. In some embodiments, an opening 192 is provided on the first frame side portion 12, extending from the outer surface to the inner surface. The pre-stressing assembly 31 is connected to the outer surface of the first frame side portion 12. The side of the pre-stressing assembly 31 facing the movable carrier 20 is connected to the actuating assembly 32. The actuating assembly 32 passes through the opening 192 and abuts against the first carrier side portion 22 of the movable carrier 20, connecting the pre-stressing assembly 31 to the outer surface of the first frame side portion 12. Compared to connecting the pre-stressing assembly 31 to the inner surface of the first frame side portion 12, this layout is more convenient for assembly, and it helps to reduce the gap between the first frame side portion 12 and the first carrier side portion 22, maintaining a compact drive mechanism structure.

[0394] In some embodiments, the pre-load assembly 31 includes a main body 311 and a fixed portion 312. The fixed portion 312 is connected to the outer surface of the first frame side portion 12. The main body 311 abuts against the actuator assembly 32, specifically, the piezoelectric vibrator 322, or the piezoelectric circuit board 321 on the side of the piezoelectric vibrator 322 facing away from the movable carrier 20. The main body 311 applies a force to the piezoelectric vibrator 322 toward the movable carrier 20, causing the friction head 323 on the piezoelectric vibrator 322 to apply a pre-load force P perpendicular to the central axis O to the movable carrier 20. Under the abutment of this pre-load force P, the movable carrier 20 can be driven by the friction head 323.

[0395] In some embodiments, the pre-compression assembly 31 is an elastic structure. Furthermore, the elastic structure can be a planar structure, such as a spring. This also means that the main body 311 and the fixing portion 312 are an integrated structure, making the pre-compression assembly 31 more reliable and ensuring the continuous and stable provision of pre-compression force P. The plane of the planar structure extends perpendicular to the direction of the pre-compression force P.

[0396] Specifically, the main body 311 of the elastic structure can be bonded to the actuator assembly 32 by glue, so that when the piezoelectric vibrator 322 is deformed, the elastic structure can also deform adaptively. The elastic structure always contacts the actuator assembly 32 and applies pre-pressure P to it.

[0397] In some embodiments, the prestressing assembly 31 may also be a prestressing plate, with the two ends of the prestressing plate forming fixed portions 312 and the middle portion of the prestressing plate forming the main body 311. Specifically, the prestressing plate may be a plastic or metal component or other rigid structure, such as an injection-molded hard plate, stainless steel, ceramic, or diamond. Alternatively, the prestressing plate may include an inner layer structure and an outer layer structure, wherein the inner layer structure may be a metal sheet, and the inner layer structure may be integrated with the outer layer structure, such as plastic, through an insert injection molding process to form a one-piece structure.

[0398] Furthermore, the prestressing component 31 also includes a support member arranged on the side of the prestressing plate away from the movable carrier 20. The support member can be made of a rigid material such as a steel sheet to ensure that the prestressing component 31 can always resist the actuating component 32 when the piezoelectric vibrator 322 is deformed, that is, the prestressing component 31 directly resists the piezoelectric vibrator 322, or indirectly resists the piezoelectric vibrator 322 through the piezoelectric circuit board 321, providing a prestress P for the friction head 323.

[0399] In some embodiments, as shown in Figures 31 and 32, the pre-stressing assembly 31 includes a structural member 313 and a buffer member 314. The elastic modulus of the structural member 313 is greater than the elastic modulus of the buffer member 314. One side of the buffer member 314 is attached to the actuating assembly 32, and the other side is attached to the structural member 313. The structural member 313 is connected to the fixed frame 10.

[0400] The structural member 313 with a larger elastic modulus serves as the main supporting structure and can provide rigid support. The pre-pressure P provided by the structural member 313 is transmitted to the actuating assembly 32 through the buffer member 314, so that the friction head 323 abuts against the movable carrier 20 under the action of pressure. In this process, the buffer member 314 with a smaller elastic modulus can be deformed and can adaptively produce different degrees of shrinkage deformation according to different tolerances, thereby reducing the difference in the pre-pressure P of the piezoelectric motor under different tolerances. In the entire contact system composed of the movable carrier 20, the actuating assembly 32, the buffer member 314, and the structural member 313, the change in the pre-pressure P caused by material tolerance and assembly tolerance is reduced, so that the consistency of the driving assembly 30, that is, the piezoelectric motor, is improved.

[0401] It should be noted that the buffer 314 is connected to the actuator assembly 32 , including two situations: the buffer 314 is directly attached to the piezoelectric vibrator 322 , or the buffer 314 is indirectly connected to the piezoelectric vibrator 322 by attaching the piezoelectric circuit board 321 .

[0402] Furthermore, the fixed frame 10 is provided with an opening 192 that passes through the outer surface of the first frame side portion 12 to its inner surface, the structural member 313 is connected to the outer surface of the first frame side portion 12, the buffer member 314 and the actuating assembly 32 thereon pass through the opening 192 and abut against the movable carrier 20, connecting the pre-stressing assembly 31 to the outer surface of the first frame side portion 12, which is more convenient to operate than connecting the pre-stressing assembly 31 to the inner surface of the first frame side portion 12, and this layout is conducive to keeping the drive mechanism structure compact.

[0403] It is understood that, along the direction of the preload force P, that is, along the installation direction between the piezoelectric vibrator 322, the buffer member 314, and the structural member 313, the projections of the buffer member 314 and the actuator assembly 32 completely fall within the opening 192, so that the buffer member 314 and the actuator assembly 32 connected thereto pass through the opening 192 and abut against the movable carrier 20. On the other hand, along the direction of the preload force P, the projection of the structural member 313 partially extends beyond the range of the opening 192. The area of ​​the structural member 313 corresponding to this projection beyond the opening 192 is connected to the outer surface of the first frame side portion 12, thereby securing the structural member 313 to the fixed frame 10. In this embodiment, the length of the structural member 313 extending along the optical axis is greater than the length of the opening 192 on the fixed frame 10 extending along the optical axis, so that the structural member 313 is connected to the fixed frame 10 through both ends. There are at least two connection areas between the structural member 313 and the fixed frame 10 to ensure a certain connection strength, and the buffer member 314 is centered relative to the structural member 313 so that the two ends of the structural member 313 can be symmetrically subjected to force.

[0404] More specifically, the buffer member 314 is in the shape of a thin sheet, and the buffer member 314 includes a first side surface 3141 and a second side surface 3142 that are arranged opposite to each other and parallel to each other. The first side surface 3141 is suitable for attaching to the actuating assembly 32, and the second side surface 3142 is suitable for attaching to the structural member 313. The structural member 313 includes a third side surface 3131 corresponding to the second side surface 3142, and the third side surface 3131 is parallel to the outer surface of the first frame side portion 12, so that the actuating assembly 32 can be flatly fitted and fixed on the pre-stressing assembly 31, which is conducive to maintaining the parallelism of the actuating assembly 32 relative to the movable carrier 20 and the fixed frame 10, so that the actuating assembly 32 is arranged in parallel between the movable carrier 20 and the fixed frame 10.

[0405] In some embodiments, the structural member 313 is connected to the outer surface of the first frame side portion 12 by gluing, clamping, welding, hot riveting, or fastener connection.

[0406] As a supplement, the specific implementations of the pre-stressing component 31 forming the first magnetic member 52 include but are not limited to: 1) the pre-stressing component 31 is a spring sheet, and the spring sheet is made of a material suitable for being attracted by a magnet; 2) the pre-stressing component 31 includes a pre-stressing plate and a support member, and the pre-stressing plate and / or the support member are made of a material suitable for being attracted by a magnet; 3) the pre-stressing component 31 includes a structural member 313 and a buffer member 314, and the structural member 313 is made of a material suitable for being attracted by a magnet. It can be understood that in these three cases, the second magnetic member 51 is a magnet, and the magnet attracts the pre-stressing component 31.

[0407] In some embodiments, in order to improve the driving performance of the piezoelectric motor, the piezoelectric vibrator 322 can be made of piezoelectric ceramic material or piezoelectric single crystal material. The piezoelectric vibrator 322 can be a single-layer ceramic body or a single-layer single crystal, or a multi-layer ceramic body or a multi-layer single crystal, for example, lead zirconate titanate (PZT)-based piezoelectric ceramics, potassium sodium niobate (KNN)-based piezoelectric ceramics, barium titanate (BT)-based piezoelectric ceramics, lead magnesium niobate-lead indium niobate (PMN-PT)-based piezoelectric single crystals, etc.

[0408] In some embodiments, the friction head 323 is made of wear-resistant materials, for example, it can be made of various high-hardness wear-resistant ceramic materials, such as aluminum oxide, zirconium oxide, silicon carbide ceramics, or high-wear-resistant metal materials, carbon fiber materials, or composite materials of ceramics, metal particles and polymers, etc., so as to improve the wear resistance of the friction head 323, which is beneficial to increase the friction force between the movable carrier 20 and the friction head 323, that is, it is beneficial to increase the driving force F, and due to its wear resistance, it is beneficial to extend the service life of the friction head 323.

[0409] Conversely, in some embodiments, a wear-resistant portion is provided on the movable carrier 20, and the friction head 323 abuts against the wear-resistant portion. Specifically, the wear-resistant portion can be a wear-resistant coating, or a friction-resistant plate 29 assembled on the movable carrier 20, or an uneven surface of the movable carrier 20, etc., which can achieve a friction-resistant structure. The provision of the wear-resistant portion is beneficial to increasing the friction between the movable carrier 20 and the friction head 323, that is, it is beneficial to increasing the driving force F, and due to its wear resistance, it is beneficial to extend the service life.

[0410] Furthermore, when the wear-resistant part is set as a friction-resistant plate 29, it can be fixed on the movable carrier 20 by bonding, fastener connection, insert injection molding, etc. to form an integrated force-bearing structure with the movable carrier 20, and referring to the material of the friction head 323, the friction-resistant plate 29 can be made of the same or different wear-resistant material as the friction head 323.

[0411] It should be understood that the present application does not impose any specific limitations on the specific shapes of the friction head 323 and the friction-resistant plate 29. In specific embodiments, the friction head 323 can be shaped like a sphere, hemisphere, cuboid, platform, cylinder, semi-cylinder, etc., and the friction-resistant plate 29 can be in the form of a sheet or block. In this embodiment, the friction head 323 is cylindrical and the friction-resistant plate 29 is sheet-shaped. The line contact between the friction head 323 and the wear-resistant portion of the movable carrier 20 results in greater friction, i.e., a greater driving force F, and a better driving effect, compared to point contact.

[0412] In some embodiments, the friction head 323 and the piezoelectric vibrator 322 can be an integrated structure or a detachable structure. The friction head 323 and the piezoelectric vibrator 322 can be fixed to the piezoelectric vibrator 322 by bonding, snapping, nesting, welding or fastener connection. The friction head 323 and the piezoelectric vibrator 322 are in surface contact to ensure the connection strength. The friction head 323 can produce obvious movement with the deformation of the piezoelectric vibrator 322.

[0413] In some embodiments, the number of friction heads 323 can be one or two or more. For example, in this embodiment, two friction heads 323 are provided on the side of the piezoelectric vibrator 322 facing the movable carrier 20, and the two friction heads 323 are spaced apart along the central axis O.

[0414] It should be understood that in some embodiments of the present application, along the driving direction of the drive assembly 30, the piezoelectric vibrator 322 is provided with at least two friction heads 323 on the side facing the movable carrier 20, thereby increasing the driving stroke. Furthermore, the provision of at least two friction heads 323 on the side of the piezoelectric vibrator 322 facing the movable carrier 20 makes the actuator assembly 32 of the drive assembly 30 less susceptible to tilt during installation. Furthermore, when the actuator assembly 32 includes at least two friction heads 323, the movable carrier 20 is more easily maintained parallel to the fixed frame 10 under the action of at least one set of magnetic assemblies 50.

[0415] The present application can also provide a camera module, which includes an optical lens, a photosensitive component, and the above-mentioned driving mechanism. The optical lens is arranged on a movable carrier 20, and the photosensitive component is arranged relative to the optical lens. Since the movable carrier 20 equipped with the optical lens can be adjusted smoothly, it is conducive to realizing the focusing function or anti-shake function, thereby improving the imaging quality.

[0416] It should be pointed out that the camera module can be a periscope camera module, that is, the above-mentioned driving mechanism can be applied to the periscope camera module. The periscope camera module reflects the light vertically incident on the end of the module by adding a prism group at the front end of the traditional module, so that the vertical light can be converted into horizontal light incident into the interior of the module. In the periscope camera module, the driving mechanism is placed horizontally and behind the prism group. At this time, the direction of the optical axis and the direction of the central axis O are parallel to the direction of the horizontal light. When the movable carrier 20 moves along the direction of the central axis O, it can achieve focusing.

[0417] With reference to FIG. 36 , an exemplary camera module including a piezoelectric motor 1 will be described. The module includes the piezoelectric motor 1, a lens assembly 2, and a photosensitive assembly 3. The lens assembly 2 has an optical axis, with the piezoelectric motor 1 disposed outside the lens assembly 2. The photosensitive assembly 3 is located below the lens assembly 2 and is held in the light-sensing path of the photosensitive assembly 3. The lens assembly 2 is configured to capture imaging light from the subject and transmit the imaging light to the photosensitive assembly 3. The photosensitive assembly 3 is configured to receive the light passing through the lens assembly 2 to generate image information.

[0418] The piezoelectric motor 1 can drive the lens assembly 2 to move along the optical axis to adjust the distance between the lens assembly 2 and the photosensitive assembly 3 to achieve the focusing function; the piezoelectric motor 1 can drive the lens assembly 2 to move in the plane direction perpendicular to the optical axis to make the lens assembly 2 translate relative to the photosensitive assembly 3 to achieve the anti-shake function.

[0419] With reference to Figures 37 and 38 , an exemplary piezoelectric motor 1 will be described. This application proposes a piezoelectric motor 1, which includes a circuit board 10, a fixed component 20, a movable component 30, at least one driving mechanism 40, and a support mechanism 50. The movable component 30 is housed within the fixed component 20, the driving end of the at least one driving mechanism 40 abuts against the side wall of the movable component 30, and the movable component 30 is movably supported within the fixed component 20 by the support mechanism 50, so that when the movable component 30 is driven by the driving force of the driving mechanism 40 and moves, the frictional resistance encountered is relatively small.

[0420] A portion of the circuit board 10 is fixedly connected to the fixed component 20, and another portion of the circuit board 10 is fixedly connected to the movable component 30. The portion of the circuit board 10 fixed to the fixed component 20 and the portion of the circuit board 10 fixed to the movable component 30 are bent and have a certain degree of flexibility so that when the movable component 30 moves, the circuit board 10 has little blocking effect on the movement of the movable component 30. The circuit board 10 is electrically connected to the driving mechanism 40 to realize power supply to the driving mechanism 40.

[0421] The fixed assembly 20 includes a base 21 and a housing 22, with the housing 22 located above the base 21. The base 21 and housing 22 interlock to achieve a fixed connection. The housing 22 defines a cavity within the housing to accommodate components such as the movable assembly 30, circuit board 10, drive mechanism 40, and support mechanism 50. The housing 22 protects the internal components from external impacts that could damage them.

[0422] Referring to Figures 37 and 38, the circuit board 10 fixed on the base 21 is electrically connected to the photosensitive component 3 by leading out the pin 15, so that the circuit board 10 in the photosensitive component 3 can control the signal of the piezoelectric motor 1.

[0423] The lower end of the movable assembly 30 and the upper surface of the base 21 are movably connected by at least one support mechanism 50, and the upper end of the movable assembly 30 and the lower surface of the housing 22 are movably connected by at least one support mechanism 50. In some optional embodiments, support mechanisms 50 are provided at both the upper and lower ends of the movable assembly 30, movably connected to the base 21 and the housing 22, respectively. The support mechanisms 50 maintain the height of the gap between the movable assembly 30 and the base 21 and the housing 22, thereby reducing the movable assembly 30 from shaking or tilting in the direction of the optical axis relative to the base 21 and the housing 22, improving impact resistance, and enhancing product reliability.

[0424] Specifically, the movable assembly 30 includes a first frame 31, a second frame 32, and a third frame 33. The first frame 31 is located above the base 21 and is movably connected to the base 21 via at least one support mechanism 50. The second frame 32 is located inside the first frame 31 and has its upper end movably connected to the lower surface of the housing 22 via at least one support mechanism 50. This achieves a movable connection between the movable assembly 30 and the fixed assembly 20.

[0425] In some optional embodiments, at least one support mechanism 50 is disposed between the first frame 31 and the base 21, allowing the first frame 31 to move freely in a first direction relative to the base 21. The second frame 32 is disposed inside the first frame 31 and is movably connected to the first frame 31 via at least one support mechanism 50, allowing the second frame 32 to move freely in a second direction relative to the first frame 31. The third frame 33 is disposed inside the second frame 32 and is movably connected to the second frame 32 via at least one support mechanism 50, allowing the third frame 33 to move freely in a third direction relative to the second frame 32.

[0426] Specifically, the drive mechanism 40 includes a first drive mechanism 401, a second drive mechanism 402, and a third drive mechanism 403. The first frame 31 is movably connected to the base 21 and is adapted to move relative to the base 21 in a first direction. The first drive mechanism 401 is disposed between the first frame 31 and the base 21 to drive the first frame 31 to move relative to the base 21. The second frame 32 is movably connected to the first frame 31 and is adapted to move relative to the first frame 31 in a second direction. The second drive mechanism 402 is disposed between the second frame 32 and the first frame 31 to drive the second frame 32 to move relative to the first frame 31. The third frame 33 is movably connected to the second frame 32 and is adapted to move relative to the second frame 32 in a third direction. The third drive mechanism 403 is disposed between the third frame 33 and the second frame 32 to drive the third frame 33 to move relative to the second frame 32.

[0427] Specifically, the direction of the second frame 32's freedom of movement relative to the first frame 31 is orthogonal to the direction of the first frame 31's freedom of movement relative to the base 21. In other words, the first direction is orthogonal to the second direction. This allows the second frame 32 to move relative to the base 21 in a plane perpendicular to the optical axis. When image stabilization is enabled, the second frame 32 can be driven to move in a plane relative to the base 21. This allows the piezoelectric motor 1 to achieve optical image stabilization. Furthermore, the third frame 33 has a third direction of freedom of movement relative to the second frame 32, parallel to the optical axis. In other words, the drive direction of the second drive mechanism 402 is orthogonal to that of the first drive mechanism 401, and the drive direction of the third drive mechanism 403 is orthogonal to that of the first drive mechanism 401 and the second drive mechanism 402, respectively. This allows the third frame 33 to move in a plane perpendicular to the optical axis for image stabilization and also to move along the optical axis for focusing. Therefore, in this embodiment, the camera module 4 with the piezoelectric motor 1 can not only meet the horizontal movement required for the anti-shake shooting of the camera module, but also perform the focusing process of the picture.

[0428] In the present application, the driving mechanism 40 is piezoelectrically driven, which requires a friction connection relationship between the driving end and the driven part. By reducing the resistance of the driven part during movement, the loss of the piezoelectric motor 1 in overcoming the friction resistance can be reduced. Setting the support component 50 can not only improve the parallelism of the movement of the driven part, but also change the friction mode of the driven part to reduce the friction resistance of the driven part during movement. For example, when the support component 50 is set as a ball, the driven part is subjected to point friction, or, when the support component 50 is a guide rod, the driven part is subjected to line friction. The friction force of point friction or line friction is smaller than that of surface friction, thereby reducing the friction loss of the driving mechanism 40, which is beneficial to increasing the service life of the driving mechanism 40 and the piezoelectric motor 1.

[0429] For ease of understanding, referring to the schematic representation of Figure 38, the first direction is the x-axis direction in the figure, the second direction is the y-axis direction perpendicular to the x-axis direction and forming a horizontal plane with the x-axis direction, and the third direction is the z-axis direction perpendicular to the horizontal plane, and the z-axis direction is parallel to the optical axis.

[0430] Each driving mechanism 40 includes its own pre-stressing component 41 and an actuating component 42. The pre-stressing component 41 applies a pre-stress to the actuating component 42 so that the actuating component 42 abuts against the driven part, so that the actuating component 42 is suitable for driving the driven part to move when receiving a driving signal. The actuating component 42 includes a piezoelectric vibrator 422 and a friction head 423. The friction head 423 is arranged on the side of the piezoelectric vibrator 422 facing away from the pre-stressing component 41. The friction head 423 serves as the driving end of the driving mechanism 40 and abuts against the driven part. Among them, the piezoelectric vibrator 422 is a substrate that has an inverse piezoelectric effect and contracts or expands according to the polarization direction and the direction of the electric field. It can be used by polarizing the substrate in the thickness direction of single crystal, polycrystalline ceramics, polymers, etc. The inverse piezoelectric effect refers to the application of an electric field in the polarization direction of a dielectric, and the dielectric undergoes mechanical deformation when a potential difference is generated. The piezoelectric vibrator 422 has the function of ultrasonic oscillation, and can realize yaw reciprocating motion or elliptical motion on a specially arranged electrode layer, so as to achieve the effect of driving the driving end of the driving mechanism 40 .

[0431] For the convenience of description, the driven part is recorded as a movable part, and the frame or base 21 that carries the driven part and is arranged adjacent to the driven part is recorded as a fixed part. In this application, the piezoelectric motor 1 includes a movable part, a fixed part and a driving mechanism 40, wherein the movable part is movably connected to the fixed part, and the driving mechanism 40 includes a pre-stressing component 41 and an actuating component 42. The actuating component 42 includes at least one piezoelectric vibrator 422. The pre-stressing component 41 is connected to the fixed part and the actuating component 42, and applies a pre-stress to the actuating component 42 so that the actuating component 42 abuts against the movable part, so as to drive the movable part to move relative to the fixed part by piezoelectric drive.

[0432] Referring to FIG. 39 , in the prior art, the preload component is typically configured as a spring 410. The spring 410 is positioned on the side of the piezoelectric vibrator 422 facing away from the movable member. The end of the spring 410 is connected to a fixed member, and the middle portion of the spring 410 presses against the side of the piezoelectric vibrator 422. The preload is provided by utilizing the elastic force of the spring 410. Because the spring 410 has low rigidity and is easily deformed, the spring 410 will bend after providing the preload, and an inclination angle will be generated in the middle portion of the spring 410, which will cause the piezoelectric vibrator 422 to have an inclination angle relative to the movable member that is not preset. For example, ideally, the spring 410 is positioned parallel to the piezoelectric vibrator 422 to provide a preload perpendicular to the contact surface of the movable member. However, in actual use, the spring 410 bends, causing the piezoelectric vibrator 422 to tilt relative to the movable member. This will then cause the actuator assembly 42 to drive the movable part to move in two opposite directions relative to the fixed part, with inconsistent movement speeds, affecting the driving effect of the piezoelectric motor 1, and will affect the focusing function and anti-shake function, resulting in a worse shooting effect of the camera module.

[0433] At the same time, considering that the moving parts, fixed parts and other components have certain material tolerances during processing and forming, and there are certain assembly tolerances when these components are assembled into a complete piezoelectric motor 1, the material tolerance and assembly tolerance will directly affect the degree of deformation of the spring 410, and then affect the pre-pressure, resulting in differences in the pre-pressure of each piezoelectric motor 1 produced in the same batch. The pre-pressure is the pressure of the actuator component 42 against the moving part. The size and direction of the pre-pressure will affect the size of the friction between the actuator component 42 and the moving part, and the actuator component 42 actually relies on this friction to drive the moving part. In other words, the existence of material tolerance and assembly tolerance leads to the problem of inconsistent pre-pressure in multiple piezoelectric motors 1 in the same batch, resulting in different driving effects of each actuator component 42 on the moving part.

[0434] Furthermore, in the prior art, the spring 410 is bonded to the flexible circuit board 421 disposed on one side of the piezoelectric vibrator 422 in the actuator assembly 42 by an adhesive such as UV glue or thermosetting glue. After curing, the adhesive has a large elastic modulus, which, on the one hand, hinders the deformation of the piezoelectric vibrator 422, and on the other hand, causes the piezoelectric vibrator 422 and the spring 410 to form a rigid whole, thereby changing the vibration mode of the piezoelectric vibrator 422. Under the influence of these two aspects, the driving force of the actuator assembly 42 is low, affecting the driving effect of the piezoelectric motor 1. It should be noted that the elastic modulus of the commonly used UV glue or thermosetting glue after curing is greater than 1GPa, which is sufficient to cause the piezoelectric vibrator 422 and the spring 410 to form a rigid whole, thereby changing the vibration mode of the vibrator.

[0435] In order to solve the above problems, the present application improves the structure of the pre-pressing assembly 41 and other related components.

[0436] The present application provides a new piezoelectric motor 1 solution: a piezoelectric motor 1 used in a camera module, which includes: a fixed part, a movable part and a driving assembly, the movable part is movably connected to the fixed part, the driving assembly includes a pre-stressing assembly 41 and an actuating assembly 42, the pre-stressing assembly 41 includes a structural part 411 and a buffer part 412, the structural part 411 is connected to the fixed part, the buffer part 412 is arranged between the structural part 411 and the actuating assembly 42, and is suitable for being deformed by the squeezing of the structural part 411 and the actuating assembly 42, the pre-stressing assembly 41 applies a pre-pressure to the actuating assembly 42 so that the actuating assembly 42 abuts against the movable part, so that the actuating assembly 42 is suitable for driving the movable part to move relative to the fixed part when receiving a driving signal.

[0437] In this solution, first, structural member 411 acts as a rigid support. Structural member 411 will not significantly deform under the action of preload, preventing actuator assembly 42 from tilting relative to the moving part, thereby improving the driving effect of piezoelectric motor 1 and, in turn, the shooting effect of the camera module. Second, because buffer member 412 is deformable, buffer member 412 is positioned between structural member 411 and actuator assembly 42. When assembling piezoelectric motor 1, the deformation of buffer member 412 can offset at least part of the preload variation caused by material tolerance and assembly tolerance. For example, if one piezoelectric motor 1 has a 10um tolerance and the other has a 100um tolerance, the preload deviation between the two will be less than ten times the difference due to the deformation buffering of buffer member 412. 3. The buffer member 412 can absorb part of the deformation of the piezoelectric vibrator 422, which is conducive to maintaining the setting angle of the piezoelectric vibrator 422 relative to the movable part, so that the actual movement state of the piezoelectric vibrator 422 is close to the design value, and the influence of the external environment, such as the deformation of the pre-stressing component 41, on the movement of the piezoelectric vibrator 422 is reduced. Furthermore, the buffer member 412 can be attached between the actuator component 42 and the structural member 411, which is not only convenient for assembly, but also avoids the problem of affecting the vibration mode of the piezoelectric vibrator 422 caused by using adhesives such as UV glue or thermosetting glue to bond the spring piece 410 in the prior art.

[0438] The actuator assembly 42 generally includes a piezoelectric vibrator 422 and a friction head 423. The surface of the piezoelectric vibrator 422 facing away from the preload assembly 41 is connected to the friction head 423. The preload applied by the preload assembly 41 to the actuator assembly 42 acts on the movable member through the piezoelectric vibrator 422 and the friction head 423. In other words, the friction head 423 abuts against the movable member under the preload.

[0439] Considering that the piezoelectric vibrator 422 needs to be powered to work, in some optional embodiments, the actuator assembly 42 also includes a flexible circuit board 421 that provides power to the piezoelectric vibrator 422, and the flexible circuit board 421 is arranged between the piezoelectric vibrator 422 and the buffer 412. The flexible circuit board 421 (FPC) is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as a substrate. FPC is also known as a soft circuit board or a flexible circuit board. It is highly favored for its excellent properties such as light weight, thin thickness, and free bending and folding. As shown in Figure 44, the flexible circuit board 421 can be a local structure of the circuit board 10, or it can be another circuit board or several circuit boards electrically connected to the circuit board 10.

[0440] In some optional embodiments, the structural member 411 includes a first mounting surface 4111 facing the buffer member 412, the buffer member 412 includes a second mounting surface 4122 opposite to the first mounting surface 4111, and a third mounting surface 4123 arranged opposite to the second mounting surface 4122, the first mounting surface 4111 is in contact with the second mounting surface 4122, the actuator assembly 42 includes a piezoelectric vibrator 422 and a friction head 423, the piezoelectric vibrator 422 is in contact with the third mounting surface 4123, the side of the piezoelectric vibrator 422 facing away from the third mounting surface 4123 is connected to the friction head 423, and the friction head 423 is in contact with the movable part.

[0441] In another optional embodiment, as shown in FIG45 , the actuator assembly 42 further includes a flexible circuit board 421 that provides power to the piezoelectric vibrator 422. Specifically, the structural member 411 includes a first mounting surface 4111 facing the buffer member 412. The buffer member 412 includes a second mounting surface 4122 opposite the first mounting surface 4111, and a third mounting surface 4123 opposite and parallel to the second mounting surface 4122. The first mounting surface 4111 is in contact with the second mounting surface 4122. The actuator assembly 42 includes a flexible circuit board 421, a piezoelectric vibrator 422, and a friction head 423. Two opposing surfaces of the flexible circuit board 421 are in contact with the third mounting surface 4123 and the piezoelectric vibrator 422, respectively. The surface of the piezoelectric vibrator 422 facing away from the third mounting surface 4123 is connected to the friction head 423, and the friction head 423 abuts against the movable member.

[0442] In some optional embodiments, the pre-load assembly 41 includes a structural member 411 and a buffer member 412. The buffer member 412 is directly attached between the structural member 411 and the actuating assembly 42. In other words, the actuating assembly 42 is attached to the structural member 411 via the buffer member 412. Specifically, the movable member is disposed within a fixed member, which has an opening extending through both the inner and outer sides of the fixed member. The structural member 411 is disposed outside the fixed member, and the dimensions of the structural member 411 in at least one direction are greater than the dimensions of the opening. In other words, the dimensions of the structural member 411 in one direction parallel to its first mounting surface 4111 are greater than the dimensions of the opening, so that the structural member 411 can be fixed outside the fixed member. The buffer member 412 and the actuating assembly 42 pass through the opening, thereby allowing the actuating assembly 42 to abut against the movable member. It should be understood that the length and width of the opening are greater than or equal to the length and width of the actuating assembly 42 and the buffer member 412, so that the actuating assembly 42 and the buffer member 412 can pass through the opening, thereby allowing the actuating assembly 42 to abut against the movable member. The piezoelectric vibrator 422 is housed within the opening, reducing the size increase caused by the external placement of the piezoelectric vibrator 422 and thus reducing the size of the piezoelectric motor 1. It should be noted that, in this application, the dimensions of the various components of the drive assembly, such as the buffer 412, the piezoelectric vibrator 422, and the opening on the fixing member, refer to the size of the projection of each component onto the structural member 411 along the installation direction between the actuator assembly 42, the buffer 412, and the structural member 411.

[0443] More specifically, the buffer member 412 is in the form of a thin sheet, which is used to be parallel to the two side surfaces attached to the actuating assembly 42 and the structural member 411, that is, the second mounting surface 4122 on the outside of the buffer member 412 is arranged in parallel with the third mounting surface 4123 on the inside, and the side of the structural member 411 facing the buffer member 412 is a plane, which is the first mounting surface 4111. The first mounting surface 4111 is connected to the outer side surface of the fixing member and the actuating assembly 42, so that the actuating assembly 42 can be kept parallel to the structural member 411, thereby maintaining the parallelism of the actuating assembly 42 relative to the movable member and the fixed member, so that the actuating assembly 42 is arranged in parallel between the movable member and the fixed member.

[0444] Although the self-adaptive deformation of the buffer member 412 can offset at least some material and assembly tolerances and reduce the preload differences among multiple piezoelectric motors 1 in the same batch, the consistency of the preload of each piezoelectric motor 1 still needs to be improved.

[0445] To this end, the present application adjusts the pressure applied to the structural member 411 during the assembly process of the piezoelectric motor 1, so that the structural member 411 gradually moves closer to the movable member, and adjusts the degree of compression and deformation of the buffer member 412, thereby setting the preload of the piezoelectric motor 1 at a preset value in the initial state. The structural member 411 is then fixed to the fixing member, and the spacing between the structural member 411 and the outer surface of the fixing member is fixed to maintain the preset preload, thereby significantly improving the consistency of the preload in multiple piezoelectric motors 1. In order to more fully disclose the solution of the piezoelectric motor 1 of the present application, the corresponding assembly process of the piezoelectric motor 1 will be disclosed later.

[0446] As shown in FIG47 , given the differences in material and assembly tolerances between different piezoelectric motors 1, in piezoelectric motors 1 with smaller tolerances, the preload generated by the preload assembly 41 may reach a predetermined value when the structural member 411 moves a short distance toward the movable member. At this point, a gap a exists between the surface of the structural member 411 facing the buffer member 412 and the outer surface of the fixed member. In one specific embodiment, the surface of the structural member 411 facing the buffer member 412 is a first mounting surface 4111, which is a flat surface. A certain distance separates the first mounting surface 4111 from the outer surface of the fixed member, forming the gap a therebetween.

[0447] In some optional embodiments, as shown in FIG48 , the structural member 411 is connected to the fixed member via an adhesive 61, with the adhesive covering at least a portion of the circumference of the structural member 411. It is understood that if the adhesive is disposed between the side of the structural member 411 facing the fixed member and the outer side of the fixed member, then when applying the glue, the side of the structural member 411 facing the fixed member and the outer side of the fixed member must first be exposed to facilitate the application of the glue. This can be inconvenient and can also hinder the assembly step of adjusting the preload by applying a force toward the movable member to the structural member 411. Covering the circumference of the structural member 411 with adhesive is convenient and efficient, making it easier to use during actual assembly. It should be understood that the adhesive 61 covers both the outer side of the fixed member and at least a portion of the circumference of the structural member 411.

[0448] As an improvement, in some optional embodiments, when the adhesive is applied to the periphery of structural member 411, the adhesive extends to the side of structural member 411 facing away from the fixed member. In other words, a portion of the adhesive is applied in the direction of installation of actuating assembly 42, buffer member 412, and structural member 411. This arrangement allows the adhesive to provide a better fixation effect, pressing structural member 411 tightly toward the fixed and movable members, thereby providing continuous and stable preload.

[0449] In addition, in one embodiment, the size of the structural member 411 in a specific direction exceeds the size of the opening on the fixing member. The structural member 411 is rectangular, and along its length, the middle part of the structural member 411 is arranged relative to the opening, and the two ends of the structural member 411 are opposite to the shell around the opening on the fixing member. The adhesive is coated on both ends of the structural member 411 so that the structural member 411 can be connected to the fixing member. In other embodiments, the structural member 411 is set to other shapes. The size of the structural member 411 may be larger than the size of the opening in multiple directions, and multiple ends or the entire periphery of the structural member 411 are opposite to the shell around the opening. The adhesive is coated on at least two scattered points on the side of the structural member 411 to achieve the connection between the structural member 411 and the fixing member.

[0450] In a specific embodiment, the adhesive is UV glue. UV glue, also known as ultraviolet glue, is a one-component UV visible light curing modified acrylic structural adhesive. UV glue is a type of adhesive that is cured by ultraviolet light irradiation. In a specific embodiment, when assembling the piezoelectric motor 1, UV glue can be first applied to the side of the structural member 411 facing the fixed member and the outer side of the fixed member, and then the structural member 411 is fixed by UV light, that is, ultraviolet irradiation to cure the glue. At this time, the distance between the structural member 411 and the fixed member is determined, and the pre-pressure is at the initial preset value. Of course, the UV glue can also be coated on the peripheral side of the structural member 411 so that the UV glue is in contact with the outer side of the fixed member at the same time.

[0451] In one embodiment, the adhesive is a UV thermosetting adhesive. UV thermosetting adhesive is a type of adhesive that can be cured by ultraviolet light, heat, or baking. In one embodiment, when assembling the piezoelectric motor 1, the UV thermosetting adhesive can be first applied to the structural member 411 and the fixing member and then irradiated with ultraviolet light to initially secure the structural member 411 to the fixing member. Once the spacing between the structural member 411 and the fixing member is determined, heating is then performed to fully cure the UV thermosetting adhesive.

[0452] In some optional embodiments, the structural member 411 is fixed to the outer surface of the fixing member by welding, hot riveting, etc.

[0453] In a specific embodiment, the elastic coefficient of the structural member 411 is greater than or equal to 1.2*10^5N / m, so that the structural member 411 will not undergo obvious deformation under the reaction of the pre-pressure. For example, there will be no obvious deformation when a pre-pressure of at least 300g is applied, thereby preventing the actuator assembly 42 from tilting, and further avoiding the situation where the actuator assembly 42 drives the movable part to move in two directions at inconsistent speeds.

[0454] In a specific embodiment, the thickness of the structural member 411 is greater than or equal to 150 μm. For example, in a specific example, the material of the structural member 411 is steel, and the structural member 411 is implemented as a steel plate with a thickness of 200 μm. According to actual measurements, it can be satisfied that the structural member 411 does not significantly deform after applying the preload.

[0455] It can be understood that the structural member 411 acts as a rigid support member, and the buffer member 412 acts as a buffer element with adjustable deformation. The elastic modulus of the structural member 411 is greater than the elastic modulus of the buffer member 412. The buffer member 412 is easier to deform than the structural member 411 and can adaptively produce different degrees of shrinkage deformation according to the different tolerances in different piezoelectric motors 1, thereby reducing the difference in preload pressure of each piezoelectric motor 1 under different tolerances. Accordingly, it can be understood that the thicker the thickness of the buffer member 412 and the lower the elastic modulus, the higher its tolerance for material tolerances and assembly tolerances, and the lower the impact of material tolerances and assembly tolerances on the preload pressure of the piezoelectric motor 1. However, the solution using the spring 410 in the prior art is limited by the deformation of the spring 410 itself, and the preload pressure generated by it has large fluctuations due to the influence of material tolerances. In addition, the buffer 412 can absorb part of the vibration deformation of the piezoelectric vibrator 422, maintain the parallelism of the piezoelectric vibrator 422 relative to the movable part, and solve the problem in the prior art that the vibration of the piezoelectric vibrator 422 causes the vibration of the structural part 411, thereby playing a "partitioning" role.

[0456] In a specific embodiment, the elastic modulus of the buffer 412 is greater than or equal to 100 kPa and less than or equal to 100 MPa. If the elastic modulus of the buffer 412 is too high, the buffer 412 will have difficulty deforming. If the elastic modulus of the buffer 412 is too low, the preload assembly 41 will have difficulty providing sufficient preload to the actuator assembly 42. Testing has shown that when the elastic modulus of the buffer 412 is greater than or equal to 100 kPa and less than or equal to 100 MPa, the buffer 412 is in a relatively suitable range, with a moderate hardness and softness, capable of providing the required preload.

[0457] In a specific embodiment, the thickness of the buffer 412 is greater than or equal to 50μm and less than or equal to 800μm. When the thickness of the buffer 412 is too small, the deformation range of the buffer 412 is small, which is not enough to cope with the differences in material tolerances and assembly tolerances in each piezoelectric motor 1. When the thickness of the buffer 412 is too large, it will cause the thickness of the entire drive assembly to increase, so that the overall size of the piezoelectric motor 1 increases, which is contrary to the current miniaturization requirements of the camera module. After actual measurement and experimental simulation of the tolerances in the piezoelectric motor 1, when the thickness of the buffer 412 is within this range, it is basically possible to eliminate the tolerances in each piezoelectric motor 1, and the size of the piezoelectric motor 1 in the thickness direction of the buffer 412 is controlled to be smaller.

[0458] Further considering the elastic modulus requirements for the buffer member 412 and the size requirements for the piezoelectric motor 1, the elastic modulus of the buffer member 412 ranges from 100 kPa to 20 MPa, while the thickness of the buffer member 412 ranges from 50 μm to 400 μm, both inclusive. For example, in one specific example, the elastic modulus of the buffer member 412 is 450 kPa and the thickness is 260 μm.

[0459] In some optional embodiments, the buffer 412 can be implemented as tape, with the two opposing surfaces of the buffer 412 respectively bonded to the structural member 411 and the actuator assembly 42. It is understood that the two opposing surfaces of the buffer 412 herein are the second mounting surface 4122 and the third mounting surface 4123 mentioned above. Tape connection has at least three advantages over glue connection: First, it avoids the use of high elastic modulus glue, such as UV glue with an elastic modulus of at least 1 GPa after curing, which would affect the deformation of the buffer 412 and the piezoelectric vibrator 422; second, it is easy to operate, as the actuator assembly 42 can be directly attached to the structural member 411 without the steps of applying glue and curing the glue; third, the tape has relatively good parallelism, providing parallel second mounting surface 4122 and third mounting surface 4123, which helps to improve the parallelism of the actuator assembly 42 relative to the fixed and movable parts.

[0460] In a specific embodiment, the size of the buffer 412 can be smaller than, equal to, or larger than the size of the piezoelectric vibrator 422, as long as the buffer 412 fills the gap between the piezoelectric vibrator 422 and the structural member 411. Similarly, the specific shape and number of the buffer 412 are not limited. For example, two pieces of tape can be stacked to form the buffer 412, or two pieces of tape can be spaced apart along the length of the structural member 411.

[0461] In some optional embodiments, the size of the buffer 412 is larger than the size of the actuator assembly 42, specifically larger than the size of the piezoelectric vibrator 422 in the actuator assembly 42, so that the space between the actuator assembly 42 and the structural member 411 is completely filled by the buffer 412, which is beneficial to ensure the strength of the connection structure and the installation parallelism of the actuator assembly 42.

[0462] In more detail, in this embodiment, the piezoelectric motor 1 includes a base 21, a first frame 31, a second frame 32, and a third frame 33. The first frame 31 is movably connected to the base 21 and is adapted to move relative to the base 21 in a first direction. A first driving mechanism 401 is disposed between the first frame 31 and the base 21. The second frame 32 is movably connected to the first frame 31 and is adapted to move relative to the first frame 31 in a second direction. A second driving mechanism 402 is disposed between the second frame 32 and the first frame 31. The third frame 33 is movably connected to the second frame 32 and is adapted to move relative to the second frame 32 in a third direction. A third driving mechanism 403 is disposed between the third frame 33 and the second frame 32.

[0463] Among them, at least one of the first drive mechanism 401, the second drive mechanism 402, and the third drive mechanism 403 and its surrounding related parts are improved into the above-mentioned drive assembly and related structure. In addition, it is easy to understand that when the first drive mechanism 401 is improved into the drive assembly, the base 21 is the fixed part and the first frame 31 is the movable part; when the second drive mechanism 402 is the drive assembly, the first frame 31 is the fixed part and the second frame 32 is the movable part; when the third drive mechanism 403 is the drive assembly, the second frame 32 is the fixed part and the third frame 33 is the movable part.

[0464] In other words, a piezoelectric motor 1 may contain multiple drive mechanisms 40. This application improves the preload assembly 41 and associated components in at least one of the drive mechanisms 40. For ease of description, the improved drive mechanism 40 is referred to as a drive assembly. Similarly, for ease of distinction, the preload assembly 41 and actuation assembly 42 within the first drive mechanism 401 are hereinafter referred to as the first preload assembly and the first actuation assembly, respectively. When the first drive mechanism 401 is improved to a drive assembly, the first preload assembly includes a first structural member 4011 and a first buffer member 4012, and the piezoelectric vibrator 422 and friction head 423 within the first actuation assembly are referred to as the first piezoelectric vibrator 4013 and the first friction head 4014. Similarly, the second drive mechanism 402 includes a second preload assembly and a second actuation assembly. When the second drive mechanism 402 is improved to a drive assembly, the second preload assembly includes a second structural member 4021 and a second buffer member 4022, and the second actuation assembly includes a second piezoelectric vibrator 4023 and a second friction head 4024. The third driving mechanism 403 includes a third pre-loading assembly and a third actuating assembly. When the third driving mechanism 403 is configured as the aforementioned driving assembly, the third pre-loading assembly includes a third structural member 4031 and a third buffer member 4032, and the third actuating assembly includes a third piezoelectric vibrator 4033 and a third friction head 4034. It should be noted that, in this application, when it is not specified whether the first, second, or third pre-loading assembly is currently being referred to, the term "pre-loading assembly" may refer to any one of them, and the same applies to terms such as "structural member," "buffer member," "driving mechanism," "actuating assembly," "piezoelectric vibrator," "friction head," "side electrode," and "opening."

[0465] In some optional embodiments, as shown in FIG41 , when the first driving mechanism 401 is improved into a driving assembly, the base 21 and the first frame 31 form a set of fixed parts and movable parts.

[0466] Specifically, the base 21 includes a base body 211 and base side panels 213 extending upward from at least two sides of the base body 211. The base body 211 is located on the bottom side of the base 21 and serves as a base support. The base body 211 and the housing 22 are also positioned and fixed. The base body 211 provides a mounting base for components mounted on the base 21. A base ball groove 212 is provided on the base body 211 and / or the base side panels 213. The balls disposed in the base ball groove 212 enable a movable connection between the base 21 and the first frame 31, allowing the first frame 31 to move relative to the base 21 in a first direction.

[0467] The end of the first structural member 4011 in the first pre-stressing assembly is connected to the outer wall of the base side plate 213, and the first actuating assembly is attached to the middle part of the first structural member 4011 through the first buffer member 4012, and the first buffer member 4012 and the first actuating assembly pass through the first opening 2131 on the base side plate 213. The first pre-stressing assembly applies a pre-stress to the first piezoelectric vibrator 4013 in the first actuating assembly and applies the pre-stress to the outer surface of the side wall of the first frame 31 through the first friction head 4014 on the first piezoelectric vibrator 4013. When the first piezoelectric vibrator 4013 is deformed, it drives the first friction head 4014 to move, so that the first friction head 4014 pushes the first frame 31 to move relative to the base 21 along the first direction through the friction force between the first friction head 4014 and the side wall of the first frame 31. The first buffer member 4012 is arranged between the first structural member 4011 and the first piezoelectric vibrator 4013. The first structural member 4011 plays a rigid supporting role for the first actuator assembly. The first buffer member 4012 can offset at least part of the prestress change caused by the material tolerance and assembly tolerance brought by the base side plate 213 and the side wall of the first frame 31, and absorb part of the deformation of the first piezoelectric vibrator 4013. It can prevent the first actuator assembly from tilting relative to the first frame 31 and is conducive to the vibration mode excitation of the first piezoelectric vibrator 4013. It has the effect of improving the driving effect of the piezoelectric motor 1 in the first direction and improving the consistency of the prestress provided by the first prestressing assembly between different piezoelectric motors 1.

[0468] In some optional embodiments, as shown in FIG. 42 , when the second driving mechanism 402 is improved into a driving assembly, the first frame 31 and the second frame 32 form a set of fixed parts and movable parts.

[0469] Specifically, a first frame ball groove 311 is provided on the first frame 31, and the top of the second frame 32 extends outward to form a protrusion 321 opposite to the first frame ball groove 311. The lower surface of the protrusion 321 abuts against at least part of the balls in the first frame ball groove 311. By means of the balls provided in the first frame ball groove 311, the first frame 31 and the second frame 32 are movably connected, and the second frame 32 is able to move in the second direction relative to the first frame 31, and the connection structure is simple and easy to assemble.

[0470] The end of the second structural member 4021 in the second pre-stressing assembly is connected to the outer surface of the first frame 31, and the second actuating assembly is attached to the middle part of the second structural member 4021 through the second buffer member 4022, and the second buffer member 4022 and the second actuating assembly pass through the second opening 312 on the first frame 31. The second pre-stressing assembly applies a pre-stress to the second piezoelectric vibrator 4023 in the second actuating assembly and applies the pre-stress to the side wall of the second frame 32 through the second friction head on the second piezoelectric vibrator 4023. When the second piezoelectric vibrator 4023 is deformed, it drives the second friction head to move, so that the second friction head pushes the second frame 32 to move along the second direction relative to the first frame 31 through the friction force between the second piezoelectric vibrator 4023 and the side wall of the second frame 32. The second buffer member 4022 is arranged between the second structural member 4021 and the second piezoelectric vibrator 4023, which can offset at least part of the prestress change caused by the material tolerance and assembly tolerance of the first frame 31 and the second frame 32, and absorb part of the deformation of the second piezoelectric vibrator 4023. It can prevent the second actuator assembly from tilting relative to the second frame 32, and is conducive to the vibration mode excitation of the second piezoelectric vibrator 4023. It has the effect of enhancing the driving effect of the piezoelectric motor 1 along the second direction and enhancing the consistency of the prestress provided by the second prestressing assembly between different piezoelectric motors 1.

[0471] Furthermore, a second frame ball groove 322 is provided on the top of the second frame 32, and the movable connection between the second frame 32 and the shell 22 is realized by the balls in the second frame ball groove 322, and the balls in the second frame ball groove 322 and the balls in the base ball groove 212 provide support force to the first frame 31 and the second frame 32 from the upper and lower sides respectively, so that the height position of the first frame 31 and the second frame 32 in the third direction is fixed.

[0472] More specifically, as shown in FIG37 , the housing 22 further includes a housing body 221 and a pressure plate 222. The housing body 221 is fixedly connected to the upper side of the pressure plate 222. A transverse spring 2221 is mounted on the lower surface of the pressure plate 222. The lower surface of the transverse spring 2221 abuts against the balls within the second frame ball groove 322 disposed at the top of the second frame 32. Thus, the transverse spring 2221, acting as a force-applying device, consistently applies a compressive force to these balls, ensuring that the second frame 32, the first frame 31, and the base 21 are aligned and leveled after assembly. Furthermore, the transverse spring 2221 has a certain strength, thereby limiting the upper end of the second frame 32 and increasing the mounting strength of the housing 22 on the second frame 32. Furthermore, the freedom of the housing 22 relative to the second frame 32 does not hinder the movement of the second frame 32 relative to the base 21, thereby increasing the reliability of the piezoelectric motor 1.

[0473] In some optional embodiments, as shown in FIG. 43 , when the third driving mechanism 403 is improved into a driving assembly, the second frame 32 and the third frame 33 form a set of fixed parts and movable parts.

[0474] Specifically, a second frame guide groove 323 is defined on the sidewall of the second frame 32, and a third frame guide groove 331 is defined on the sidewall of the third frame 33. The second frame guide groove 323 and the third frame guide groove 331 are disposed opposite each other, and the two guide grooves cooperate to form a ball bearing channel extending parallel to the optical axis. The balls disposed within the ball bearing channel enable a movable connection between the second frame 32 and the third frame 33, allowing the third frame 33 to move relative to the second frame 32 in the third direction. The connection structure is simple and easy to assemble.

[0475] It will be appreciated that the lens assembly 2 is disposed within the third frame 33. The third frame 33 is movable relative to the second frame 32 in a third direction. The second frame 32 is movable relative to the first frame 31 in a second direction. The first frame 31 is movable relative to the base 21 in a first direction. This allows the third frame 33 and the lens assembly 2 thereon to move freely relative to the base 21 in three directions: the third direction, the second direction, and the first direction. Furthermore, the third direction is parallel to the optical axis, enabling the piezoelectric motor 1 to achieve focusing. The first and second directions are orthogonal to each other and form a plane perpendicular to the optical axis, enabling the piezoelectric motor 1 to achieve optical image stabilization.

[0476] The end of the third structural member 4031 in the third pre-stressing assembly is connected to the outer surface of the second frame 32, and the third actuating assembly is attached to the middle part of the third structural member 4031 through the third buffer member 4032, and the third buffer member 4032 and the third actuating assembly pass through the third opening 324 on the side wall of the second frame 32. The third pre-stressing assembly applies a pre-stress to the third piezoelectric vibrator 4033 in the third actuating assembly and applies the pre-stress to the side wall of the third frame 33 through the third friction head 4034 on the third piezoelectric vibrator 4033. When the third piezoelectric vibrator 4033 is deformed, it drives the third friction head 4034 to move, so that the third friction head 4034 pushes the third frame 33 to move along the third direction relative to the second frame 32 through the friction force between the third friction head 4034 and the side wall of the third frame 33. The third buffer member 4032 is arranged between the third structural member 4031 and the third piezoelectric vibrator 4033, which can offset at least part of the prestress changes caused by the material tolerance and assembly tolerance of the second frame 32 and the third frame 33, and absorb part of the deformation of the third piezoelectric vibrator 4033. It can prevent the third actuator assembly from tilting relative to the third frame 33, and is conducive to the vibration mode excitation of the third piezoelectric vibrator 4033. It has the effect of enhancing the driving effect of the piezoelectric motor 1 along the third direction and enhancing the consistency of the prestress provided by the third prestress assembly between different piezoelectric motors 1.

[0477] Furthermore, with reference to FIG. 45 and FIG. 46 , the present application briefly explains the working principle of the piezoelectric vibrator 422 .

[0478] For ease of description, the direction indicated by the arrow in Figure 45 indicates the thickness direction of the piezoelectric vibrator 422, that is, the up and down direction, the length direction of the piezoelectric vibrator 422 is used as the front and back direction of the piezoelectric vibrator 422, and the width direction is used as the front and back direction of the piezoelectric vibrator 422.

[0479] The piezoelectric vibrator 422 has a multi-layer stacked structure. Specifically, the piezoelectric vibrator 422 is stacked in the order of ceramic layer, electrode layer, ceramic layer, electrode layer...ceramic layer, electrode layer, ceramic layer in the thickness direction. Each electrode layer is arranged between two adjacent ceramic layers, and the upper and lower halves of the piezoelectric vibrator 422 are polarized in opposite directions respectively.

[0480] The piezoelectric vibrator 422 is provided with four side electrodes, designated as a first side electrode 4221, a second side electrode 4222, a third side electrode 4223, and a fourth side electrode 4224. The first side electrode 4221 and the second side electrode 4222 are positioned front-to-back opposite each other and are both located on the left side of the piezoelectric vibrator 422. The third side electrode 4223 and the fourth side electrode 4224 are positioned front-to-back opposite each other and are both located on the right side of the piezoelectric vibrator 422. The first side electrode 4221 and the second side electrode 4222 are located on the left and right sides of the front of the piezoelectric vibrator 422 and are respectively adapted to receive two electrical signals of the same frequency but different phases, such as the X and Y signals shown in FIG46. The second side electrode 4222 and the fourth side electrode are located on the left and right sides of the rear of the piezoelectric vibrator 422 and are grounded.

[0481] It is easy to understand that the access of electrical signals and grounding of the side electrodes are achieved by electrical connection with the flexible circuit board 421 .

[0482] The four side electrodes all extend in the thickness direction of the piezoelectric vibrator 422, and are electrically connected to the top electrode layer, several middle electrode layers, and the bottom electrode layer in sequence, so that an electric field is generated between adjacent electrode layers. Under the action of the electric field, the ceramic layer undergoes deformation such as elongation or contraction. In Figure 46, the arrows facing each other indicate contraction, and the arrows facing each other indicate elongation. Through the multi-layer stacked structure, the electric field formed between each two adjacent electrode layers is superimposed in the upper and lower directions. As a result, the voltage required to drive the entire piezoelectric vibrator 422 to flexural vibration is reduced. The number of electrode layers and the number of ceramic layers can be designed according to the specific driving force requirements and voltage requirements that can be provided.

[0483] In order to more clearly explain the working principle of the piezoelectric vibrator 422, based on the above settings, the piezoelectric vibrator 422 is divided into an upper left segment, an upper right segment, a lower left segment, and a lower right segment, and when the side electrode is connected to the electrical signal, four time points from t1 to t4 are intercepted for observation. The piezoelectric vibrator 422 produces four deformation states as shown in Figure 46 at the four moments t1, t2, t3 and t4 respectively. At the moment t1, the upper left segment and the upper right segment contract, the lower left segment and the lower right segment extend, the piezoelectric vibrator 422 bends upward, and the friction head 423 moves downward relatively. At time t2, the upper left and lower right segments contract, while the lower left and upper right segments extend. As a result, the left side of the piezoelectric vibrator 422 bends upward and the right side downward, causing the friction head 423 to move toward the upper left. At times t3 and t4, the friction head 423 first moves upward and then toward the lower right. The next time an electrical signal is input at the same time as t1, the friction head 423 moves downward to the same position as t1. The piezoelectric vibrator 422 switches between these four deformation states, causing the friction head 423, fixed to the upper surface of the piezoelectric vibrator 422, to produce the elliptical motion shown in the figure. The friction head 423 is able to drive the movable part to move at high frequency.

[0484] In some embodiments, in order to improve the driving performance of the piezoelectric motor 1, the piezoelectric vibrator 422 can be made of piezoelectric ceramic material or piezoelectric single crystal material. The piezoelectric vibrator 422 can be a single-layer ceramic body or a single-layer single crystal, or a multi-layer ceramic body or a multi-layer single crystal, for example, lead zirconate titanate (PZT)-based piezoelectric ceramics, potassium sodium niobate (KNN)-based piezoelectric ceramics, barium titanate (BT)-based piezoelectric ceramics, lead magnesium niobate-lead indium niobate (PMN-PT)-based piezoelectric single crystals, etc.

[0485] In some embodiments, the friction head 423 is made of wear-resistant materials, for example, it can be made of various high-hardness wear-resistant ceramic materials, such as aluminum oxide, zirconium oxide, silicon carbide ceramics, or high-wear-resistant metal materials, carbon fiber materials, or composite materials of ceramics, metal particles and polymers, etc., so as to improve the wear resistance of the friction head 423, which is beneficial to increase the friction between the moving parts and the friction head 423, that is, it is beneficial to increase the driving force, and because of its wear resistance, it is beneficial to extend the service life of the friction head 423.

[0486] In contrast, in some embodiments, as shown in Figure 42, a wear-resistant portion 301 is provided on the movable part, and the friction head 423 contacts the wear-resistant portion 301. Specifically, the wear-resistant portion 301 can be a wear-resistant coating, or a friction-resistant plate assembled on the movable part by bonding, insert injection molding, etc., or an uneven outer surface on the movable part, etc., which can achieve a friction-resistant structure. The provision of the wear-resistant portion 301 is beneficial to increasing the friction between the movable part and the friction head 423, that is, it is beneficial to increasing the driving force, and because of its wear resistance, it is beneficial to extend the service life.

[0487] Furthermore, when the wear-resistant part 301 is set as a friction-resistant plate, it can be fixed to the movable part by bonding, fastener connection, insert injection molding, etc. to form an integrated force-bearing structure with the movable part, and referring to the material of the friction head 423, the friction-resistant plate can be made of the same or different wear-resistant material as the friction head 423.

[0488] It is understood that the present application does not impose any specific restrictions on the specific shapes of the friction head 423 and the friction-resistant plate. In a specific embodiment, the shape of the friction head 423 can be a sphere, a hemisphere, a cuboid, a table, a cylinder, a semi-cylinder, etc., and the friction-resistant plate can be in the form of a sheet or a block. In one example of the present application, the friction head 423 is cylindrical in shape. The cylindrical friction head 423 is placed vertically as shown in FIG39 , or placed horizontally on the piezoelectric vibrator 422 as shown in FIG45 , to provide linear friction between the drive assembly and the movable part. The linear contact between the friction head 423 and the wear-resistant portion 301 of the movable part has greater friction than point contact, and has better driving force and driving effect.

[0489] The number of friction heads 423 can be one or two or more. In this embodiment, the piezoelectric vibrator 422 is in the shape of a rectangular strip, and the friction head 423 is protrudingly arranged at the center position of the side of the piezoelectric vibrator 422 facing the movable part, which can increase the unit driving stroke of the friction head 423. In another embodiment, the number of friction heads 423 is two, and the two friction heads 423 are arranged at intervals along the length direction of the piezoelectric vibrator 422, and the length direction of the piezoelectric vibrator 422 is parallel to the movement direction of the movable part driven by it. In the driving direction along the driving component, at least two friction heads 423 are provided on the side of the piezoelectric vibrator 422 facing the movable part, thereby increasing the driving stroke.

[0490] In some embodiments, the friction head 423 and the piezoelectric vibrator 422 can be an integrated structure or a detachable structure. The friction head 423 and the piezoelectric vibrator 422 can be fixed to the piezoelectric vibrator 422 by bonding, snapping, nesting, welding or fastener connection. The friction head 423 and the piezoelectric vibrator 422 are in surface contact to ensure the connection strength. The friction head 423 can produce obvious movement with the deformation of the piezoelectric vibrator 422.

[0491] Corresponding to the structure of the piezoelectric motor 1 provided in this application, this application further discloses an assembly process of the piezoelectric motor 1, which includes the following steps:

[0492] S1. Provide a fixed member, a movable member, and a driving assembly, wherein the driving assembly includes a pre-pressing assembly 41 and an actuating assembly 42 , and the pre-pressing assembly 41 includes a structural member 411 and a buffer member 412 ;

[0493] S2. Install the movable part into the fixed part;

[0494] S3, placing the buffer member 412 between the structural member 411 and the actuating assembly 42 to form a combined body;

[0495] S4. Insert the buffer member 412 and the actuating assembly 42 in the assembly into the opening of the fixing member, leaving the structural member 411 outside the opening;

[0496] S5. Apply pressure to the structural member 411 to bring the structural member 411 closer to the movable member, so that the actuating assembly 42 abuts against the movable member. The buffer member 412 is squeezed and deformed by the structural member 411 and the actuating assembly 42.

[0497] S6. Fix the structural member 411 on the fixing member. During the fixing process, continue to apply the pressure provided in step S5 to the structural member 411. After the structural member 411 is fixed, remove the pressure.

[0498] Among them, S2 and S3 are in no particular order.

[0499] Considering that the size of the pre-stress will affect the size of the driving force of the piezoelectric actuator, although the provision of the buffer 412 can reduce the influence of the manufacturing tolerance and assembly tolerance of the material on the size of the pre-stress, the sizes of the pre-stress in the multiple piezoelectric motors 1 manufactured are still different, and accordingly, the driving force of the piezoelectric motors 1 is also different. For the piezoelectric motors 1 manufactured in large quantities, the inconsistency of the driving force will cause the performance of the piezoelectric motors 1 to have large differences. Therefore, it is necessary to further provide a method to improve the problem. To this end, the present application further improves the assembly process:

[0500] As an improvement, step S5 further includes the steps of obtaining the pressure applied to structural member 411 via a pressure sensor and adjusting the pressure until it matches a preset value. By utilizing the rigid support provided by structural member 411 and the adjustable deformation of buffer member 412 in preload assembly 41 during assembly of piezoelectric motor 1, the preload force can be actively calibrated and adjusted to a fixed preset value, achieving consistent preload force across all piezoelectric motors 1.

[0501] In a specific embodiment, a device with a pressure sensor applies pressure to the back of the structural member 411 , and while pressing the structural member 411 toward the fixing member to increase the current preload, the current preload can be measured in real time and synchronously.

[0502] It should be particularly emphasized that in the above-mentioned step S6, during the process of fixing the structural member 411 on the outer side surface of the fixing member, it is necessary to maintain the application of pressure and keep the pressure value equal to the preset value, so that after the pressure is finally removed, the pre-pressure provided by the pre-pressure component 41 to the actuating component 42 is close to the preset value.

[0503] In some optional embodiments, in step S6, fixing the structural member 411 on the fixing member specifically includes the steps of: applying glue to the circumference of the structural member 411 and bringing the glue into contact with the fixing member, continuously applying the pressure provided in step S5 to the structural member 411, and completing the fixation of the structural member 411 after the glue solidifies, and removing the pressure.

[0504] It is understood that if the glue is applied between the side of the structural member 411 facing the fixed member and the outer side of the fixed member, the side of the structural member 411 facing the fixed member and the outer side of the fixed member must be exposed before applying the glue. In other words, the assembly formed in step S3 must be removed first, which is inconvenient and can easily hinder the assembly step of adjusting the preload by applying a force toward the movable member on the structural member 411. The method of coating the adhesive around the side of the structural member 411 is convenient and efficient, making it convenient for actual assembly.

[0505] Furthermore, in some optional embodiments, when the adhesive is applied to the periphery of the structural member 411, the adhesive extends to the side of the structural member 411 facing away from the fixed member. In other words, a portion of the adhesive is applied in the direction of the installation of the actuating assembly 42, the buffer member 412, and the structural member 411. This arrangement allows the adhesive to provide a better fixing effect, pressing the structural member 411 tightly toward the fixed member and the movable member, thereby providing a continuous and stable preload.

[0506] Furthermore, the glue may be UV glue, which is first coated on the circumference of the structural member 411 so that the UV glue covers at least a portion of the circumference of the structural member 411, and then cured by UV light, i.e., ultraviolet radiation.

[0507] As shown in Figures 49 and 50, in the prior art, a piezoelectric motor includes a fixed frame 10, a movable carrier 20 movably disposed within the fixed frame 10, and a support assembly 30 and a drive assembly 40 disposed between the movable carrier 20 and the fixed frame 10. The drive end of the drive assembly 40 abuts against the movable carrier 20 and provides a preload P to the movable carrier 20. The support assembly 30 is disposed between the fixed frame 10 and the movable carrier 20 and provides a supporting force N to the movable carrier 20. The supporting force N cooperates with the preload P to enable the movable carrier 20 to be movably supported on the fixed frame 10. Furthermore, when the drive assembly 40 receives a drive signal, it can drive the movable carrier 20 to move in a specific direction through friction between the drive end and the movable carrier 20.

[0508] Specifically, the driving assembly 40 includes a pre-stressing assembly 41 and an actuating assembly 42. The pre-stressing assembly 41 is connected to the fixed frame 10, and the actuating assembly 42 is connected to the pre-stressing assembly 41. The pre-stressing assembly 41 provides a pre-stressing force P toward the movable carrier 20 to the actuating assembly 42, so that the driving end of the brake assembly abuts against one side of the movable carrier 20 and applies the pre-stressing force P to the movable carrier 20.

[0509] More specifically, the actuator assembly 42 includes a piezoelectric vibrator 422 and a friction head 423. The piezoelectric vibrator 422 is connected to the pre-load assembly 41. The friction head 423 is fixed to the side of the piezoelectric vibrator 422 facing the movable carrier 20. The friction head 423 serves as the driving end of the driving assembly 40 and abuts against the side wall of the movable carrier 20. The piezoelectric vibrator 422 is a substrate that has an inverse piezoelectric effect and contracts or expands according to the polarization direction and the direction of the electric field. It can be used by polarizing the substrate in the thickness direction of single crystal, polycrystalline ceramics, polymers, etc. The inverse piezoelectric effect refers to the application of an electric field in the polarization direction of the dielectric, and the dielectric undergoes mechanical deformation when a potential difference is generated. The piezoelectric vibrator 422 has the effect of ultrasonic oscillation and can achieve oscillatory reciprocating motion or elliptical motion on a specifically set electrode layer, thereby driving the friction head 423 to perform oscillatory reciprocating motion or elliptical motion, thereby achieving the drive of the movable carrier 20.

[0510] It should be noted that the piezoelectric vibrator 422 causes the friction head 423 to move by deformation. When the piezoelectric vibrator 422 deforms, the angle between the friction head 423 and the contact surface of the movable carrier 20 changes accordingly, resulting in the preload force P not always acting perpendicularly on the side wall of the movable carrier 20, but rather the direction of the preload force P having a certain inclination relative to the plane on which the side wall of the movable carrier 20 is located. At the same time, when the hardness of the preload component 41 is relatively low, for example, when the preload component 41 is a spring 410, the preload component 41 may bend to a certain extent due to the deformation of the piezoelectric vibrator 422, causing the direction of the preload force P to change relative to the angle of the contact surface. In other words, under certain circumstances, the direction of the preload force P is inclined relative to the plane on which the side wall of the movable carrier 20 is located. In this case, when the actuating component 42 drives the movable carrier 20 to move, it is easy to cause the movable carrier 20 to tilt.

[0511] In some existing embodiments, the preload component 41 is configured as a spring clip 410. The spring clip 410 is located on the side of the piezoelectric vibrator 422 facing away from the movable carrier 20. The end of the spring clip 410 is fixedly connected to the fixed frame 10, and the middle portion of the spring clip 410 abuts against the outer surface of the piezoelectric vibrator 422. The preload P is provided by the elastic force of the spring clip 410. Because the spring clip 410 has low stiffness and is easily deformed, the spring clip 410 will bend after the preload P is provided, and the middle portion of the spring clip 410 will have an inclination angle, which will cause the piezoelectric vibrator 422 to have an inclination angle relative to the movable carrier 20 that is not predetermined. For example, in an ideal situation, the spring clip 410 is arranged parallel to the piezoelectric vibrator 422 to provide a preload P perpendicular to the abutment surface of the movable carrier 20. However, in actual use, the spring clip 410 bends, causing the piezoelectric vibrator 422 to tilt relative to the movable carrier 20. The preload P acts obliquely on the movable carrier 20, causing the movable carrier 20 to tilt.

[0512] In particular, in some existing embodiments, the support assembly 30 is disposed at two diagonal positions of the movable carrier 20. From a top-down perspective, the support assembly 30 disposed at the two diagonal positions of the movable carrier 20 and the actuator assembly 42 form a three-point arrangement on the side wall of the movable carrier 20. The distance from the center position of the frictional contact between the actuator assembly 42 and the movable carrier 20 to the line connecting the support assembly 30 disposed at the two diagonal positions is the lever arm x. The magnitude of the overturning moment M of the movable carrier 20 at the diagonal position is positively correlated with the magnitude of the lever arm x. The three-point arrangement makes the lever arm x and the overturning moment M larger. When the movable carrier 20 is driven by the actuator assembly 42, the movable carrier 20 will have a larger tilt angle, causing the movable carrier 20 to tilt. Once the movable carrier 20 tilts to a certain extent, the support assembly 30 will be stuck between the movable carrier 20 and the fixed frame 10, making the movable carrier 20 unable to move to achieve the optical focus function. The existing arrangement of the support assembly 30 affects the speed and effect of optical focus.

[0513] In order to solve this problem, the present application improves the setting position of the support component 30: the present application provides a piezoelectric motor, which is applied to a camera module, as shown in Figures 51-60, which includes a fixed frame 10, a movable carrier 20, a driving component 40, and a support component 30. The movable carrier 20 is movably set on the fixed frame 10, the driving component 40 is connected to the fixed frame 10 and abuts against the movable carrier 20. The support component 30 is set between the fixed frame 10 and the movable carrier 20. The support component 30 cooperates with the driving component 40 to support the movable carrier 20 on the fixed frame 10, and the driving component 40 and the support component 30 are set on the same side of the piezoelectric motor.

[0514] Compared to the prior art arrangement in which the two support assemblies 30 and the friction head 423 of the actuating assembly 42 are arranged at three points on the sidewall of the movable carrier 20, the arrangement of the support assembly 30 and the driving assembly 40 on the same side of the piezoelectric motor reduces the distance from the friction head 423 of the actuating assembly 42 to the line connecting the two support assemblies 30, i.e., x decreases, thereby reducing the torque M. When the movable carrier 20 is driven to move by the actuating assembly 42, the inclination angle of the movable carrier 20 is small, reducing the risk of the movable carrier 20 tilting and the support assembly 30 getting stuck, thereby preventing the optical focus effect from being affected. In addition, the support assembly 30 is arranged between the fixed frame 10 and the movable carrier 20, so that there is a fixed gap between the opposing surfaces of the fixed frame 10 and the movable carrier 20. The support assembly 30 can change the contact mode between the fixed frame 10 and the movable carrier 20, such as point contact and line contact. Compared with the mode of generating friction by direct surface contact between the fixed frame 10 and the movable carrier 20, the friction contact area is reduced, thereby reducing the friction force on the movable carrier 20 when it moves relative to the fixed frame 10, and the movable carrier 20 is easier to drive.

[0515] In some optional embodiments, the movable carrier 20 is arranged in the fixed frame 10, and a lens assembly is provided on the movable carrier 20, and the lens assembly has an optical axis. The driving assembly 40 can drive the movable carrier 20 to move relative to the fixed frame 10 along the optical axis direction, thereby realizing the optical focusing function.

[0516] In some optional embodiments, the driving assembly 40 includes a pre-stressing assembly 41 and an actuating assembly 42. The pre-stressing assembly 41 is connected to the fixed frame 10, and the actuating assembly 42 is connected to the pre-stressing assembly 41. The pre-stressing assembly 41 provides a pre-stressing force P to the actuating assembly 42, so that the driving end of the actuating assembly 42 abuts against the movable carrier 20 and applies the pre-stressing force P to the movable carrier 20, so that the actuating assembly 42 is suitable for driving the movable carrier 20 to move relative to the fixed frame 10 when receiving a driving signal.

[0517] Furthermore, the actuating assembly 42 includes a piezoelectric vibrator 422 and a friction head 423. The piezoelectric vibrator 422 is connected to the preload assembly 41. The friction head 423 is fixed to the side of the piezoelectric vibrator 422 facing the movable carrier 20. The friction head 423 serves as the driving end of the driving assembly 40 and abuts against the side wall of the movable carrier 20. The high-frequency, micro-amplitude vibration of the piezoelectric vibrator 422 causes the friction head 423 to move. The friction between the friction head 423 and the outer wall of the movable carrier 20 drives the movable carrier 20 to move linearly in a direction parallel to the optical axis.

[0518] In some optional embodiments, the actuator assembly 42 further includes a piezoelectric circuit board, specifically a flexible printed circuit board 421 (FPC). The piezoelectric circuit board is connected to the piezoelectric vibrator 422 to provide power and drive signals to the piezoelectric vibrator 422. Specifically, the piezoelectric circuit board can be disposed on the side of the piezoelectric vibrator 422 facing away from the movable carrier 20.

[0519] In some optional embodiments, the pre-load assembly 41 is disposed on the side of the piezoelectric vibrator 422 facing away from the movable carrier 20, so as to provide a pre-load force P to the friction head 423 disposed on the side of the piezoelectric vibrator 422 facing the movable carrier 20, thereby pressing the movable carrier 20. Furthermore, when the actuating assembly 42 includes a piezoelectric circuit board, the piezoelectric circuit board can be disposed between the piezoelectric vibrator 422 and the pre-load assembly 41.

[0520] In some optional embodiments, the support component 30 is specifically implemented as a ball. Under the action of the pre-load component 41, multiple balls are clamped between the fixed frame 10 and the movable carrier 20. There is point contact between the balls and the movable carrier 20. The multiple balls form a support surface, providing a supporting force N for the movable carrier 20, so that the movable carrier 20 is supported parallelly and stably on the fixed frame 10.

[0521] As shown in Figure 52, in another optional embodiment, considering that when the movable carrier 20 has a certain inclination angle relative to the fixed frame 10, there is a risk of the ball bearing getting stuck, and when sliding friction occurs between the ball bearing, the fixed frame 10, and the movable carrier 20, the ball bearing may be in a rolling state or a sliding state, the motion state of the ball bearing is uncertain, and the ball bearing can switch motion states at will, increasing the risk of getting stuck. In addition, the ball bearing may fall off, rub against or collide with the movable carrier 20 and the fixed frame 10, generating debris, which may cause the ball bearing to get stuck. When the support assembly 30 is configured as a ball bearing, there is a defect of uncertain friction and easy getting stuck, which affects the focusing effect. Therefore, in some embodiments, the support assembly 30 is specifically implemented as a guide rod. At least two guide rods are provided, and the two guide rods together form a support surface to support the movable carrier 20 on the fixed frame 10. The guide rods are in line contact with the fixed frame 10 and the movable carrier 20, which reduces the risk of getting stuck compared to ball bearings.

[0522] With reference to Figures 53 and 54, in some optional embodiments, the support assembly 30 is a guide rod, and the movable carrier 20 is provided with at least two protrusions 201 suitable for contacting the guide rod, and these at least two protrusions 201 are spaced apart in a direction parallel to the length direction of the guide rod. It can be understood that the movable carrier 20 contacts the guide rod through the protrusions 201, and a relative depression is formed between two adjacent protrusions 201, and the depression does not contact the guide rod, which can reduce the friction contact area between the movable carrier 20 and the guide rod and reduce the friction resistance suffered by the movable carrier 20 when it moves. The protrusions 201 are spaced apart in the length direction of the guide rod in order to support the guide rod at at least two points or two regions in the length direction of the guide rod so that the guide rod is stably supported.

[0523] In some optional embodiments, the protrusion heights of the protrusions 201 are consistent to keep the length direction of the guide rod parallel to the optical axis.

[0524] In some optional embodiments, the movable carrier 20 is provided with two protrusions 201, and the two protrusions 201 are located at both ends of the movable carrier 20, and the middle portion of the movable carrier 20 is relatively recessed to separate from the middle portion of the support assembly 30. The purpose of reducing the friction contact area and stably supporting the guide rod is achieved with a minimum number of protrusions 201, and the structure is relatively simple and easy to process and form.

[0525] It can be understood that the present application does not limit the support component 30 to be specifically a ball, guide rod or other structure, as long as it can provide a support surface to support the movable carrier 20 and reduce the friction resistance of the movable carrier 20 during movement. For example, the support component 30 can also be implemented as a slider fixed to the movable carrier 20 or the fixed frame 10.

[0526] In some optional embodiments, the support assembly 30 includes a first support member 31 and a second support member 32, and the first support member 31 and the second support member 32 are respectively located on either side of the drive assembly 40. The two support assemblies 30 provide a supporting force N to the movable carrier 20 from both sides of the drive assembly 40, so that the movable carrier 20 can be stably supported within the fixed frame 10.

[0527] Furthermore, the first support member 31 and the second support member 32 are symmetrically arranged on both sides of the driving assembly 40 to provide equal supporting forces N to both sides of the movable carrier 20, thereby preventing the movable carrier 20 from tilting due to rotation around the optical axis.

[0528] Specifically, the fixed frame 10 has a first frame side portion 11 , the movable carrier 20 has a first carrier side portion 21 , the first frame side portion 11 and the first carrier side portion 21 are arranged opposite to each other, and the driving assembly 40 is arranged between the first frame side portions 11 and the first frame side portions 11 .

[0529] Furthermore, the first frame side portion 11 is provided with an opening 111 extending through both its inner and outer sides. The pre-pressing assembly 41 is connected to the outer surface of the first frame side portion 11, and the actuating assembly 42 is connected to the pre-pressing assembly 41 and abuts against the outer surface of the first carrier side portion 21 through the opening 111. The drive assembly 40 is partially accommodated within the opening 111, reducing the space required for the drive assembly 40 and the size of the piezoelectric motor.

[0530] The fixed frame 10 is provided with a first inner protrusion 12 and a second inner protrusion 13 that protrude toward the movable carrier 20. The first carrier side portion 21 is provided with a first outer protrusion 22 and a second outer protrusion 23 at both ends, both protruding toward the fixed frame 10. The first outer protrusion 22 is located between the first frame side portion 11 and the first inner protrusion 12, and the second outer protrusion 23 is located between the first frame side portion 11 and the second inner protrusion 13. The first support member 31 is located between the first outer protrusion 22 and the first inner protrusion 12, and the second support member 32 is located between the second outer protrusion 23 and the second inner protrusion 13. The structural arrangement of the inner and outer protrusions allows the support assembly 30 to be positioned on the same side of the piezoelectric motor as the drive assembly 40. The support assembly 30 is clamped between the inner and outer protrusions. This reduces the value of x, thereby reducing the overturning moment M acting on the movable carrier 20 and minimizing the risk of the movable carrier 20 tilting.

[0531] In some optional embodiments, the fixed frame 10 includes a second frame side 14 and a third frame side 15 adjacent to the first frame side 11, the second frame side 14 and the third frame side 15 are arranged opposite to each other, and respectively form a certain angle with the first frame side 11, the first inner protrusion 12 is arranged on the second frame side 14, and is arranged on a side relatively close to the first frame side 11, and a space suitable for accommodating the first outer protrusion 22 and the first support member 31 is formed between the first inner protrusion 12 and the first frame side 11, the second inner protrusion 13 is arranged on the third frame side 15, and is arranged on a side relatively close to the first frame side 11, and a space suitable for accommodating the second outer protrusion 23 and the second support member 32 is formed between the second inner protrusion 13 and the first frame side 11.

[0532] In some optional embodiments, the movable carrier 20 includes a second carrier side portion 24 and a third carrier side portion 25 adjacent to the first carrier side portion 21. The second carrier side portion 24 and the third carrier side portion 25 are arranged opposite to each other and intersect with the first carrier side portion 21 respectively. The left end of the first carrier side portion 21 protrudes to the left relative to the second carrier side portion 24 to form a first outer protrusion 22. A space suitable for accommodating the first inner protrusion 12 and the first support member 31 is formed between the first outer protrusion 22 and the second carrier side portion 24. The right end of the first carrier side portion 21 protrudes to the right relative to the third carrier side portion 25 to form a second outer protrusion 23. A space suitable for accommodating the second inner protrusion 13 and the second support member 32 is formed between the second outer protrusion 23 and the third carrier side portion 25.

[0533] Furthermore, in order to achieve symmetrical arrangement of the first support member 31 and the second support member 32 with respect to the drive assembly 40, the drive assembly 40 is arranged at the center of the first frame side portion 11, the first inner protrusion 12 and the second inner protrusion 13 are symmetrically arranged with respect to the drive assembly 40, and the first outer protrusion 22 and the second outer protrusion 23 are symmetrically arranged with respect to the drive assembly 40.

[0534] In some optional embodiments, a first guide groove 121 is provided on the first inner protrusion 12, and a second guide groove 221 is provided on the first outer protrusion 22. The first guide groove 121 and the second guide groove 221 are arranged opposite to each other and cooperate to form a first channel 2a extending along the first direction. The first support member 31 is disposed in the first channel 2a to guide the movement direction of the movable carrier 20. It can be understood that the first support member 31 is continuously clamped in the guide grooves on both sides. When the movable carrier 20 moves relative to the fixed frame 10, the first support member 31 cooperates with the guide grooves on both sides to limit the movement direction of the movable carrier 20 and guide the movable carrier 20 to move in the first direction. In other words, in addition to supporting the movable carrier 20, the first support member 31 also plays a positioning role.

[0535] Specifically, in this embodiment, the first direction is the optical axis direction, and, as shown in Figure 55, the first guide groove 121 and the second guide groove 221 are a group of V-shaped grooves with grooves arranged opposite to each other. The first guide groove 121 and the second guide groove 221 clamp and fix the cylindrical first support member 31 in the first channel 2a.

[0536] In some optional embodiments, similar to the assembly structure of the first support member 31, a third guide groove is provided on the second inner protrusion 13, and a fourth guide groove is provided on the second outer protrusion 23. The third guide groove and the fourth guide groove are arranged opposite to each other and cooperate to form a second channel 2b extending along the first direction. The second support member 32 is arranged in the second channel 2b, which can also play a role in guiding the movement direction of the movable carrier 20.

[0537] However, in the actual production and assembly process of the piezoelectric motor in this optional embodiment, due to certain manufacturing tolerances and assembly tolerances between the fixed frame 10 and the movable carrier 20, there may be a certain offset between the actual position of each guide groove and the theoretically preset position, making it difficult to align the two sets of guide grooves at the same time. The misalignment between the two opposing guide grooves will inevitably cause the corresponding support assembly 30 to be difficult to assemble or not properly assembled. For example, after aligning the first guide groove 121 with the second guide groove 221, there may be a misalignment between the third guide groove and the fourth guide groove, making it difficult to install the second support member 32 into the second channel 2b. In other words, taking the angle shown in Figure 51 as a reference, in order to make the first support member 31 and the second support member 32 simultaneously play a role in positioning the movable carrier 20 in the left and right directions, extremely high processing precision is required when manufacturing the piezoelectric motor, which requires a relatively high processing cost.

[0538] In this application, a first support portion 131 is provided on the second inner protrusion 13, and a second support portion 231 is provided on the second outer protrusion 23. The first support portion 131 and the second support portion 231 are arranged opposite each other and cooperate to form a second channel 2b extending along the first direction. The second support member 32 is disposed within the second channel 2b. Specifically, the first support portion 131 is provided on the side of the second inner protrusion 13 facing the first frame side portion 11, and the second support portion 231 is provided on the side of the second outer protrusion 23 facing away from the first frame side portion 11. The first support member 31 and the second support member 32 cooperate to form a support surface, thereby stably supporting the movable carrier 20 on the fixed frame 10. Furthermore, the second inner convex portion 13 can be implemented with the same structure as the first inner convex portion 12, for example, a third guide groove is provided opposite to the first guide groove 121, and the third guide groove serves as the first support portion 131. The second inner convex portion 13 can also be implemented with a structure different from that of the first inner convex portion 12, that is, in this case, the first support portion 131 can be implemented with a structure different from that of the first guide groove 121. The same applies to the second outer convex portion 23 and the second support portion 231.

[0539] As an improvement, in some optional embodiments, the first support member 31 supports and positions the movable carrier 20, and the second support member 32 supports the movable carrier 20 but does not position it, which can solve the problem of the second support member 32 being difficult to assemble.

[0540] Specifically, at least one of the first support portion 131 and the second support portion 231 is provided with a support plane 202 adapted to contact the second support member 32, and the second support member 32 is adapted to adjust its position perpendicular to the first direction along the support plane 202. Thus, even if there is a certain degree of misalignment between the first support portion 131 and the second support portion 231, the second support member 32 can still be easily assembled into the second channel 2b between the first support portion 131 and the second support portion 231. In other words, the provision of the support plane 202 allows for a certain range of manufacturing tolerances between the fixed frame 10 and the movable carrier 20, thereby reducing the precision requirements for the processing and manufacturing of the fixed frame 10 and the movable carrier 20, and lowering the difficulty and cost of processing and assembly.

[0541] More specifically, as shown in FIG56 , in this embodiment, at least one of the first support portion 131 and the second support portion 231 is provided with a support plane 202 suitable for contacting the second support member 32. Specifically, as shown in FIG56 , the first support portion 131 on the second inner protrusion 13 is provided with a planar groove. The planar groove has a certain width in the left-right direction, i.e., a direction perpendicular to both the optical axis and the direction of the preload force P. This allows the second support member 32 to adjust its position in the left-right direction along the bottom of the planar groove. In this case, the bottom of the planar groove constitutes a support plane 202. The second support portion 231 on the second outer protrusion 23 is not provided with a groove. Instead, it directly provides a planar surface extending in the left-right direction with a certain width. This allows the second support member 32 to slide left-right along this planar surface, i.e., along the second support portion 231, to adjust its position. In this case, this planar surface constitutes another support plane 202.

[0542] Furthermore, when the first support portion 131 is set as a planar groove, the left side wall and the right side wall of the planar groove are respectively extended toward the second support portion 231, thereby forming two limiting surfaces on the left and right sides, which can limit the movement range of the second support member 32 in the left and right directions, and prevent the second support member 32 from escaping from the second channel 2b in the left and right directions.

[0543] In other embodiments, the first support portion 131 may also be configured as a non-planar groove structure, and the second support portion 231 may also be configured as a planar groove structure, as long as at least one supporting plane 202 can be provided. In addition, the specific structure and setting position of the limiting surface are not specifically limited, as long as it can prevent the second support member 32 from escaping the second channel 2b in the left and right directions. For example, one of the first support portion 131 and the second support portion 231 can be configured as a V-shaped groove, and the other can be configured as a planar groove. The second support member 32 can be slid and fine-tuned along the bottom of the planar groove during assembly, and can be inserted into the V-shaped groove and limited by the V-shaped groove. Alternatively, both the first support portion 131 and the second support portion 231 are configured as planar groove structures.

[0544] In some optional embodiments, the first support member 31 is a first guide rod, and the second support member 32 is a second guide rod. The first guide rod and the second guide rod are both arranged parallel to the optical axis between the fixed frame 10 and the movable carrier 20, and are in line contact with the fixed frame 10 and the movable carrier 20 respectively.

[0545] In some other optional embodiments, the first support member 31 and the second support member 32 may also be balls, which are in point contact with the fixed frame 10 and the movable carrier 20, respectively. Furthermore, the first support member 31 includes at least two balls spaced apart along the extension direction of the first channel 2a, and the second support member 32 includes at least two balls spaced apart along the extension direction of the second channel 2b, to provide more stable support for the movable carrier 20.

[0546] In some optional embodiments, the first support member 31 is disposed in the first channel 2a and is adapted to move along the first direction, and the second support member 32 is disposed in the second channel 2b and is adapted to move at least along the first direction.

[0547] It is understood that although the present application refers to the support assembly 30 on the left side of the drive assembly 40 as the first support member 31 and the support assembly 30 on the right side of the drive assembly 40 as the second support member 32, in reality, the first support member 31 may also be the support assembly 30 on the right side of the drive assembly 40, and the second support member 32 may also be the support assembly 30 on the left side of the drive assembly 40. The same applies to the structures of the first inner convex portion 12, the second inner convex portion 13, the first outer convex portion 22, and the second outer convex portion 23.

[0548] It should be noted that in situations where the support assembly 30 and the movable carrier 20 are in non-point contact, such as when the support assembly 30 is a guide rod, the protrusion 201 provided to reduce the contact area between the movable carrier 20 and the guide rod does not conflict with the second guide groove 221 and the second support portion 231. Referring to FIG. 54 , in this embodiment, the second guide groove 221 is a V-shaped groove, which contacts the guide rod via its two side walls. The middle portions of the two side walls of the V-shaped groove are recessed downward to avoid contact with the guide rod, and the two ends of the two side walls of the V-shaped groove protrude, forming a portion of the so-called protrusion 201. The second support portion 231 actually corresponds to the side of the protrusion 201 facing away from the first frame side portion 11 of the fixed frame 10. That is, the second outer protrusion 23 is provided with a portion of the protrusion 201, and the side of this portion of the protrusion 201 opposite the third carrier side portion 25 forms the second support portion 231.

[0549] In order to more clearly illustrate the solution of the present application, the present application further discloses the relevant structure of the pre-pressing component 41 in the driving component 40.

[0550] In some optional embodiments, the pre-pressing component 41 is an elastic structure, such as a spring 410. Specifically, the spring 410 can be bonded to the actuating component 42 by glue.

[0551] In some optional embodiments, considering that the spring 410 may deform along with the piezoelectric vibrator 422, causing the preload force P to tilt on the movable carrier 20, thereby causing the movable carrier 20 to tilt, the present application improves the preload assembly 41: As shown in Figures 52 and 57-60, the preload assembly 41 includes a structural member 411 and a buffer member 412. The structural member 411 is connected to the fixed frame 10, and the buffer member 412 is disposed between the structural member 411 and the actuating assembly 42 and is adapted to be deformed by the compression of the structural member 411 and the actuating assembly 42. In other words, the actuating assembly 42 is attached to the structural member 411 via the buffer member 412.

[0552] In the prior art, the pre-stressing assembly 41 will deform and bend, causing the actuating assembly 42 to tilt relative to the movable carrier 20, and then the actuating assembly 42 drives the movable carrier 20 to move at inconsistent speeds in two opposite directions relative to the fixed frame 10, affecting the driving effect of the piezoelectric motor. The present application improves the structure of the pre-stressing assembly 41, and the structural member 411 will not be significantly deformed under the action of the pre-stressing force P, which can prevent the actuating assembly 42 from tilting relative to the movable carrier 20, thereby improving the driving effect of the piezoelectric motor and thus improving the shooting effect of the camera module. Since the buffer member 412 can be deformed, the buffer member 412 is set between the structural member 411 and the actuating assembly 42. When assembling the piezoelectric motor, the deformation of the buffer member 412 can offset at least part of the change in the pre-stressing force P caused by the material tolerance and assembly tolerance, thereby improving the consistency of the pre-stressing force P in multiple piezoelectric motors in the same batch. In addition, the problem that the piezoelectric vibrator 422 in the actuator component 42 and the spring 410 form a rigid whole due to the large elastic modulus of adhesives such as UV glue or thermosetting glue after curing, thereby affecting the vibration mode of the piezoelectric vibrator 422 and thus affecting the driving effect is also solved. The buffer member 412 of the present application can absorb part of the deformation of the piezoelectric vibrator 422, which is conducive to maintaining the setting angle of the piezoelectric vibrator 422 relative to the movable carrier 20, so that the actual motion state of the piezoelectric vibrator 422 is close to the design value, reducing the influence of the external environment, such as the deformation of the pre-load component 41, on the movement of the piezoelectric vibrator 422.

[0553] Specifically, as shown in Figures 52 and 57 , the movable carrier 20 is disposed within the fixed frame 10. The fixed frame 10 is provided with an opening 111 extending through both the interior and exterior sides of the fixed frame 10. The structural member 411 is disposed outside the fixed frame 10, and the dimensions of the structural member 411 in at least one direction are larger than the dimensions of the opening 111, so that the structural member 411 can be fixed outside the fixed frame 10. The buffer member 412 and the actuator assembly 42 pass through the opening 111, thereby allowing the actuator assembly 42 to abut against the movable carrier 20. It should be understood that the length and width of the opening 111 are greater than or equal to the length and width of the actuator assembly 42 and the buffer member 412, so that the actuator assembly 42 and the buffer member 412 can pass through the opening 111 and abut against the movable carrier 20. The piezoelectric vibrator 422 is accommodated within the opening 111, reducing the size increase caused by the external placement of the piezoelectric vibrator 422 and thus reducing the size of the piezoelectric motor. It should be noted that, in the present application, the dimensions of the various components such as the buffer 412 and the piezoelectric vibrator 422 in the driving component 40, and the opening 111 on the fixed frame 10 refer to the size of the projection of each component onto the structural component 411 along the installation direction between the actuator component 42, the buffer 412, and the structural component 411.

[0554] More specifically, the buffer member 412 is in the form of a thin sheet, which is used to be parallel to the two side surfaces attached to the actuating component 42 and the structural member 411, that is, the outer side surface of the buffer member 412 is arranged in parallel with the inner side surface, and the side of the structural member 411 facing the buffer member 412 is a plane, which is connected to the outer side surface of the fixed frame 10 and the actuating component 42, so that the actuating component 42 can be kept parallel to the structural member 411, thereby maintaining the parallelism of the actuating component 42 relative to the movable carrier 20 and the fixed frame 10, so that the actuating component 42 is arranged in parallel between the movable carrier 20 and the fixed frame 10.

[0555] While the adaptive deformation of the buffer member 412 can offset at least some material and assembly tolerances, reducing variations in preload force P across multiple piezoelectric motors from the same batch, the consistency of preload force P across the various piezoelectric motors still needs to be improved.

[0556] To this end, the present application adjusts the pressure applied to the structural member 411 during the assembly process of the piezoelectric motor, so that the structural member 411 gradually moves closer to the movable carrier 20, and adjusts the degree of extrusion and deformation of the buffer member 412, thereby setting the pre-pressure P of the piezoelectric motor at a preset value in the initial state, and then fixes the structural member 411 on the fixed frame 10, and fixes the distance between the structural member 411 and the outer surface of the fixed frame 10 to maintain the preset size of the pre-pressure P, so that the consistency of the pre-pressure P in multiple piezoelectric motors is significantly improved.

[0557] Given the differences in material tolerances and assembly tolerances between different piezoelectric motors, in piezoelectric motors with smaller tolerances, when the structural member 411 moves a short distance toward the movable carrier 20, the preload P value generated by the preload component 41 may have reached a preset value. At this time, there is a gap between the side of the structural member 411 facing the buffer member 412 and the outer side surface of the fixed frame 10.

[0558] In some optional embodiments, as shown in FIG60 , the structural member 411 is connected to the fixed frame 10 via an adhesive 61, which covers at least a portion of the circumference of the structural member 411. It is understood that if the adhesive 61 is positioned between the side of the structural member 411 facing the fixed frame 10 and the outer side of the fixed frame 10, then when applying the glue, the side of the structural member 411 facing the fixed frame 10 and the outer side of the fixed frame 10 must first be exposed to facilitate the application of the glue. This can be inconvenient and can also hinder the assembly step of adjusting the preload P by applying a force to the structural member 411 toward the movable carrier 20. Coating the adhesive 61 around the circumference of the structural member 411 is convenient and efficient, making it easier to use during actual assembly. It should be understood that the adhesive 61 covers both the outer side of the fixed frame 10 and at least a portion of the circumference of the structural member 411.

[0559] As an improvement, in some optional embodiments, when adhesive 61 is applied to the periphery of structural member 411, adhesive 61 extends to the side of structural member 411 facing away from fixed frame 10. In other words, a portion of adhesive 61 is disposed in the installation direction of actuating assembly 42, buffer member 412, and structural member 411. This arrangement allows adhesive 61 to provide a better fixing effect, firmly pressing structural member 411 toward fixed frame 10 and movable carrier 20, thereby continuously and stably providing preload force P.

[0560] In addition, in one embodiment, the size of the structural member 411 in a specific direction exceeds the size of the opening 111 on the fixed frame 10. The structural member 411 is rectangular, and along its length, the middle of the structural member 411 is arranged opposite to the opening 111, and the two ends of the structural member 411 are opposite to the shell around the opening 111 on the fixed frame 10. The adhesive 61 is coated on both ends of the structural member 411, so that the structural member 411 can be connected to the fixed frame 10. In other embodiments, the structural member 411 is set to other shapes. The dimensions of the structural member 411 may be larger than the dimensions of the opening 111 in multiple directions, and multiple ends or the entire periphery of the structural member 411 are opposite to the shell around the opening 111. The adhesive 61 is coated on at least two scattered points on the side of the structural member 411 to achieve the connection between the structural member 411 and the fixed frame 10.

[0561] In a specific embodiment, the adhesive 61 is UV glue. UV glue, also known as ultraviolet glue, is a single-component UV visible light curing modified acrylic structural adhesive. UV glue is a type of adhesive that is cured by ultraviolet light irradiation. In a specific embodiment, when assembling the piezoelectric motor, UV glue can be first applied to the side of the structural member 411 facing the fixed frame 10 and the outer side of the fixed frame 10, and then the glue is cured by UV light, that is, ultraviolet irradiation, to complete the fixation of the structural member 411. At this time, the distance between the structural member 411 and the fixed frame 10 is determined, and the pre-pressure P is at the initial preset value. Of course, the UV glue can also be coated on the peripheral side of the structural member 411 so that the UV glue is in contact with the outer side of the fixed frame 10 at the same time.

[0562] In one embodiment, the adhesive is a UV thermosetting adhesive. UV thermosetting adhesive is a type of adhesive that can be cured by ultraviolet light, heat, or baking. In one embodiment, when assembling the piezoelectric motor, the UV thermosetting adhesive can be first applied to the structural member 411 and the fixed frame 10 and irradiated with ultr...

Claims

1. A driving mechanism applied to a camera module, characterized in that: include: a fixing member, the fixing member comprising a support surface; A movable member, the movable member is movably disposed on the fixed member, and the movable member includes a contact surface disposed opposite to the supporting surface; A guide assembly, the guide assembly being located between the support surface and the contact surface so as to maintain a fixed gap between the fixed member and the movable member; A driving assembly, the driving assembly is connected to the fixing member and abuts against the movable member and provides a pre-pressure; A magnetic attraction component, the magnetic attraction component includes at least one group of a first magnetic attraction component and a second magnetic attraction component, the first magnetic attraction component is arranged on one of the fixed component and the movable component, the second magnetic attraction component is arranged on the other of the fixed component and the movable component, the first magnetic attraction component interacts with the second magnetic attraction component to attract the contact surface of the movable component to the support surface of the fixed component, and the direction of the magnetic attraction force generated by the magnetic attraction component is parallel to the pre-pressure direction of the driving component.

2. The driving mechanism according to claim 1, characterized in that: The guide assembly and the drive assembly are arranged on the same side of the movable member.

3. The driving mechanism according to claim 2, characterized in that: The guide assembly includes a first guide member and a second guide member, and the first guide member and the second guide member are both arranged adjacent to the driving assembly.

4. The driving mechanism according to claim 3, characterized in that: The guide assembly, the drive assembly and the magnetic attraction assembly are all arranged on the same side of the movable part.

5. The driving mechanism according to claim 4, characterized in that: The magnetic attraction component includes a first group of magnetic attraction components and a second group of magnetic attraction components arranged relative to the driving component, and the first group of magnetic attraction components and the second group of magnetic attraction components are respectively arranged on both sides of the driving component.

6. The driving mechanism according to claim 5, characterized in that: Along the direction parallel to the pre-pressure, the first magnetic member and the second magnetic member in the first group of magnetic components are respectively arranged on both sides of the first guide member, and the first magnetic member and the second magnetic member in the second group of magnetic components are respectively arranged on both sides of the second guide member, the first magnetic member and the second magnetic member of the first group of magnetic components attract each other, and the first magnetic member and the second magnetic member in the second group of magnetic components attract each other.

7. The driving mechanism according to claim 5, characterized in that: The driving assembly includes a pre-stressing assembly and an actuating assembly, wherein the pre-stressing assembly is connected to the fixing member, and the actuating assembly is connected to the pre-stressing assembly. The pre-stressing assembly provides the pre-stressing force to the actuating assembly, so that the friction head of the actuating assembly abuts against one side of the movable member and applies the pre-stressing force to the movable member. The pre-stressing force is in the same direction as the magnetic attraction force. When the actuating assembly receives a driving signal, the friction head provides a driving force to the movable member to drive the movable member to move.

8. The driving mechanism according to claim 7, characterized in that: A plane passing through the center line of the pre-pressing component and extending along the pre-pressing direction is taken as a reference plane, and the first group of magnetic attraction components and the second group of magnetic attraction components are symmetrically arranged with respect to the reference plane.

9. The driving mechanism according to claim 7, characterized in that: The pre-stressing assembly includes a structural part and a buffer part, the elastic modulus of the structural part is greater than that of the buffer part, the fixing part is provided with an opening penetrating from the outer wall of the fixing part to the inner wall thereof, the structural part is connected to the outer wall of the fixing part, one side of the buffer part is attached to the structural part, and the other side is attached to the actuating assembly, the buffer part and the actuating assembly thereon pass through the opening and abut against the movable part.

10. The driving mechanism according to claim 1, characterized in that: Along the moving direction of the movable part, the length of the first magnetic part is L, the length of the second magnetic part is Y, and the travel range of the movable part driven by the driving component is D, Y>L+D, or L>Y+D.

11. The driving mechanism according to claim 1, characterized in that: It also includes a magnetic induction component, which is arranged relative to the magnetic attraction component, so as to determine the position of the movable part by inducing changes in the magnetic field.

12. The driving mechanism according to claim 3 or 4, characterized in that: The movable part is provided with an outer convex portion, which protrudes from the outer side wall of the movable part in a direction away from the driving component. The fixed part is provided with an inner convex portion, which protrudes from the inner side wall of the fixed part in a direction close to the driving component. The inner convex portion is arranged opposite to the outer convex portion, the contact surface is formed on the outer convex portion, and the support surface is formed on the inner convex portion.

13. The driving mechanism according to claim 12, characterized in that: The movable part is also provided with an inner recessed portion, which is formed by being recessed from the outer side wall of the movable part toward the direction close to the driving component, and the outer protrusion is connected to the inner recessed portion and cooperates to form a first groove, and the inner protrusion is suitable for being inserted into the first groove. The fixed part is provided with an outer recessed portion, which is formed by being recessed from the inner side wall of the fixed part toward the direction away from the driving component, and the outer recessed portion is connected to the inner protrusion and cooperates to form a second groove, and the outer protrusion is suitable for being inserted into the second groove.

14. The driving mechanism according to claim 12, characterized in that: The support surface is provided with a first guide groove and a third guide groove, and the contact surface is provided with corresponding second guide grooves and fourth guide grooves, the first guide groove and the second guide groove cooperate to clamp the first guide member therein, the third guide groove and the fourth guide groove cooperate to clamp the second guide member therein, and the first guide member and the second guide member keep the support surface and the contact surface parallel.

15. A camera module, characterized in that: include: Optical lens; A photosensitive component arranged relative to the optical lens; as well as According to the driving mechanism according to any one of claims 1 to 14, the optical lens is arranged on the movable part.

16. A driving mechanism applied to a camera module, characterized in that: include: A fixed frame, the fixed frame comprising a support surface; A movable carrier, the movable carrier being movably arranged on the fixed frame, and the movable carrier comprising a contact surface arranged opposite to the supporting surface; A guide assembly, wherein the guide assembly is located between the support surface and the contact surface so as to maintain a first gap between the support surface and the contact surface; A driving assembly, wherein the driving assembly is connected to the fixed frame and abuts against the movable carrier and applies a pre-pressure to the movable carrier, wherein the pre-pressure causes the contact surface to tend to move away from the supporting surface; At least one group of magnetic suction components, the magnetic suction component includes a first magnetic suction component and a second magnetic suction component, the first magnetic suction component is arranged on the fixed frame, and the second magnetic suction component is arranged on the movable carrier, the first magnetic suction component and the second magnetic suction component interact with each other to apply a magnetic suction force to the movable carrier, the direction of the magnetic suction force is opposite to the direction of the pre-pressure, and the magnetic suction force is greater than the pre-pressure, so as to adsorb the contact surface of the movable carrier to the support surface of the fixed frame, and the guide component is clamped between the support surface and the contact surface.

17. The driving mechanism according to claim 16, characterized in that: The fixed frame has a first frame side portion, and the movable carrier has a first carrier side portion, the first frame side portion is arranged opposite to the first carrier side portion, the inner surface of the first frame side portion forms the supporting surface, and the outer surface of the first carrier side portion forms the contact surface, and the guide assembly and the drive assembly are both arranged between the first frame side portion and the first carrier side portion.

18. The driving mechanism according to claim 17, characterized in that: The driving assembly includes a pre-stressing assembly and an actuating assembly, wherein the pre-stressing assembly is connected to the fixed frame, and the actuating assembly is connected to the pre-stressing assembly. The pre-stressing assembly provides the pre-stressing force to the actuating assembly so that the friction head of the actuating assembly abuts against the outer surface of the side of the first carrier and applies the pre-stressing force to the movable carrier.

19. The driving mechanism according to claim 17, characterized in that: The guide assembly includes a first guide member and a second guide member, and the first guide member and the second guide member are respectively arranged on both sides of the driving assembly.

20. The driving mechanism according to claim 19, characterized in that: The first magnetic attraction member is disposed on the side of the first frame, and the second magnetic attraction member is disposed on the side of the first carrier.

21. The driving mechanism according to claim 20, characterized in that: The magnetic attraction component includes a first group of magnetic attraction components and a second group of magnetic attraction components arranged relative to the driving component, and the first group of magnetic attraction components and the second group of magnetic attraction components are respectively arranged on both sides of the driving component.

22. The driving mechanism according to claim 21, characterized in that: The first group of magnetic components is arranged on a side of the first guide member away from the driving component, and the second group of magnetic components is arranged on a side of the second guide member away from the driving component.

23. The driving mechanism according to claim 21, characterized in that: The first group of magnetic components is arranged between the first guide member and the driving component, and the second group of magnetic components is arranged between the second guide member and the driving component.

24. The driving mechanism according to claim 21, characterized in that: The first group of magnetic components and the second group of magnetic components are symmetrically arranged about the central axis of the driving component, and the magnetic attraction force generated by the first group of magnetic components is equal to the magnetic attraction force generated by the second group of magnetic components.

25. The driving mechanism according to claim 20, characterized in that: The magnetic attraction components are arranged as a group, and along the pre-pressure direction, the first magnetic attraction member and the second magnetic attraction member in the group of magnetic attraction components are respectively arranged on both sides of the driving component.

26. The driving mechanism according to claim 25, characterized in that: The driving assembly includes a pre-stressing assembly and an actuating assembly, wherein the pre-stressing assembly is connected to the fixed frame, and the actuating assembly is connected to the pre-stressing assembly. The pre-stressing assembly provides the pre-stressing force to the actuating assembly so that the friction head of the actuating assembly abuts against the outer surface of the side of the first carrier and applies the pre-stressing force to the movable carrier. The pre-stressing assembly forms the first magnetic attraction component, and the middle part of the second magnetic attraction component is arranged opposite to the friction head.

27. The driving mechanism according to any one of claims 16 to 26, characterized in that: The first magnetic attraction member and the second magnetic attraction member are arranged parallel to each other, and both are extended along the moving direction of the movable carrier, so that the magnetic attraction force is perpendicular to the moving direction of the movable carrier.

28. The driving mechanism according to claim 27, characterized in that: Along the moving direction of the movable carrier, the length of the first magnetic member is L, the length of the second magnetic member is Y, the travel range of the movable carrier driven by the driving component is D, and L≥Y+D.

29. The driving mechanism according to claim 17, wherein: The fixed frame includes a second frame side portion and a fourth frame side portion respectively arranged at both ends of the first frame side portion, the inner surface of the second frame side portion and the inner surface of the fourth frame side portion respectively protrude inward to form an inner convex portion, and the movable carrier includes a second carrier side portion and a fourth carrier side portion respectively arranged at both ends of the first carrier side portion, the outer surface of the second carrier side portion and the outer surface of the fourth carrier side portion respectively protrude outward to form an outer convex portion, the outer convex portion is located between the inner convex portion and the supporting surface, a second gap is provided between a side of the outer convex portion facing away from the contact surface and a side of the inner convex portion facing the supporting surface, and a width of the second gap is smaller than a width of other gaps between the movable carrier and the fixed frame.

30. The driving mechanism according to claim 16, wherein: The first magnetic attraction member and / or the second magnetic attraction member is a magnet, and the driving mechanism further includes a magnetic induction member, which is arranged relative to at least one of the magnets, so as to determine the position of the movable carrier by inducing changes in the magnetic field.

31. A camera module, characterized in that: include: Optical lens; A photosensitive component arranged relative to the optical lens; as well as According to the driving mechanism according to any one of claims 16 to 30, the optical lens is arranged on the movable carrier.

32. A piezoelectric motor applied to a camera module, characterized in that: include: Fixings; A movable part, the movable part is movably connected to the fixed part; A driving assembly, the driving assembly includes a pre-stressing assembly and an actuating assembly, the pre-stressing assembly includes a buffer and a structural member, the structural member is connected to the fixed member, the buffer is arranged between the structural member and the actuating assembly, and is suitable for being deformed by the compression of the structural member and the actuating assembly, the pre-stressing assembly applies a pre-pressure to the actuating assembly so that the actuating assembly abuts against the movable member, so that the actuating assembly is suitable for driving the movable member to move relative to the fixed member when receiving a driving signal.

33. The piezoelectric motor according to claim 32, wherein: The structural member includes a first mounting surface facing the buffer member, the buffer member includes a second mounting surface opposite to the first mounting surface, and a third mounting surface arranged opposite to the second mounting surface, the first mounting surface is fitted with the second mounting surface, the actuator assembly includes a piezoelectric vibrator and a friction head, the piezoelectric vibrator is fitted with the third mounting surface, a side of the piezoelectric vibrator facing away from the third mounting surface is connected to the friction head, and the friction head abuts against the movable member.

34. The piezoelectric motor according to claim 32, wherein: The structural member includes a first mounting surface facing the buffer member, the buffer member includes a second mounting surface opposite to the first mounting surface, and a third mounting surface opposite to and parallel to the second mounting surface, the first mounting surface is bonded to the second mounting surface, the actuating assembly includes a flexible circuit board, a piezoelectric vibrator and a friction head, two opposite surfaces of the flexible circuit board are respectively bonded to the third mounting surface and the piezoelectric vibrator, a surface of the piezoelectric vibrator facing away from the third mounting surface is connected to the friction head, and the friction head abuts against the movable member.

35. The piezoelectric motor according to claim 32, wherein: The movable part is arranged in the fixed part, and an opening is provided on the fixed part which passes through the inner and outer sides of the fixed part. The structural part is arranged on the outer side of the fixed part, and the size of the structural part in at least one direction is larger than the size of the opening. The buffer part and the actuating assembly pass through the opening, so that the actuating assembly can abut against the movable part.

36. The piezoelectric motor according to claim 35, wherein: A gap is provided between a surface of the structural component facing the buffer component and an outer surface of the fixing component.

37. The piezoelectric motor according to any one of claims 32 to 36, characterized in that: The structural member is connected to the fixing member by an adhesive, and the adhesive covers at least a portion of a peripheral side of the structural member.

38. The piezoelectric motor according to any one of claims 32 to 36, characterized in that: The elastic coefficient of the structural component is greater than or equal to 1.2*10^5N / m; the thickness of the structural component is greater than or equal to 150μm.

39. The piezoelectric motor according to any one of claims 32 to 36, characterized in that: The elastic modulus of the buffer component is greater than or equal to 100 KPa and less than or equal to 100 MPa; the thickness of the buffer component is greater than or equal to 50 μm and less than or equal to 800 μm.

40. The piezoelectric motor according to claim 39, wherein: The buffer member is an adhesive tape, and two opposite surfaces of the buffer member are respectively bonded to the structural member and the actuating assembly.

41. The piezoelectric motor according to any one of claims 32 to 36, characterized in that: include: Base; The first frame is movably connected to the base and is suitable for moving relative to the base along a first direction. A first driving mechanism is provided between the bases; A second frame is movably connected to the first frame and is suitable for moving relative to the first frame along a second direction, and a second driving mechanism is provided between the second frame and the first frame; a third frame, movably connected to the second frame and adapted to move relative to the second frame along a third direction, a third driving mechanism being provided between the third frame and the second frame; Wherein, at least one of the first driving mechanism, the second driving mechanism, and the third driving mechanism is the driving assembly, and when the first driving mechanism is the driving assembly, the base is a fixed part and the first frame is a movable part, when the second driving mechanism is the driving assembly, the first frame is a fixed part and the second frame is a movable part, and when the third driving mechanism is the driving assembly, the second frame is a fixed part and the third frame is a movable part.

42. A camera module, characterized in that: include: A piezoelectric motor as described in any one of claims 32 to 41; A lens assembly, disposed in the piezoelectric motor; The photosensitive component is arranged relative to the lens component.

43. A piezoelectric motor assembly process, characterized in that: Includes steps: S1. Provide a fixed part, a movable part, and a driving assembly, wherein the driving assembly includes a pre-pressing assembly and an actuating assembly, and the pre-pressing assembly includes a buffer part and a structural part; S2, installing the movable part into the fixed part; S3, disposing the buffer member between the structural member and the actuating assembly to form a combined body; S4, extending the buffer member and the actuating assembly in the assembly into the opening on the fixing member, and leaving the structural member outside the opening; S5, applying a pressure to the structural member to make the structural member approach the movable member, so that the actuating assembly abuts against the movable member, and the buffer member is squeezed and deformed by the structural member and the actuating assembly; S6, fixing the structural member on the fixing member, and during the fixing process, continuously applying the pressure provided in step S5 to the structural member, and after the fixing of the structural member is completed, removing the pressure; Among them, S2 and S3 are in no particular order.

44. The assembly process of a piezoelectric motor as claimed in claim 43, characterized in that: Step S5 also includes the steps of: obtaining the value of the pressure applied to the structural member through a pressure sensor, and adjusting the magnitude of the pressure until it is the same as a preset value.

45. The assembly process of a piezoelectric motor as claimed in claim 43, characterized in that: In step S6, fixing the structural member on the fixing member specifically includes the steps of: applying glue on the circumference of the structural member and making the glue contact with the fixing member, continuously applying the pressure provided in step S5 to the structural member, and completing the fixing of the structural member after the glue is cured, and removing the pressure.

46. ​​A piezoelectric motor, applied to a camera module, characterized in that: include: Fixed frame; A movable carrier, the movable carrier being movably arranged on the fixed frame; A driving assembly, the driving assembly is connected to the fixed frame and abuts against the movable carrier; A support assembly, wherein the support assembly is disposed between the fixed frame and the movable carrier, and the support assembly cooperates with the driving assembly so that the movable carrier is supported on the fixed frame; and the driving assembly and the support assembly are disposed on the same side of the piezoelectric motor.

47. The piezoelectric motor according to claim 46, wherein: The supporting assembly is a guide rod, and the movable carrier is provided with at least two protrusions suitable for contacting the guide rod, and the at least two protrusions are arranged at intervals in a direction parallel to the length direction of the guide rod.

48. The piezoelectric motor according to claim 47, wherein: The movable carrier is provided with two protrusions, and the two protrusions are located at two ends of the movable carrier, and the middle part of the movable carrier is relatively recessed to be separated from the middle part of the supporting assembly.

49. The piezoelectric motor according to any one of claims 46 to 48, characterized in that: The support assembly includes a first support member and a second support member, and the first support member and the second support member are respectively located on two sides of the driving assembly.

50. The piezoelectric motor according to claim 49, wherein: The first support member and the second support member are symmetrically arranged on both sides of the driving assembly.

51. The piezoelectric motor according to claim 49, wherein: The fixed frame has a first frame side portion, the movable carrier has a first carrier side portion, the first frame side portion is arranged opposite to the first carrier side portion, the driving assembly is arranged between the first frame side portion and the first frame side portion, the fixed frame is provided with a first inner convex portion and a second inner convex portion protruding toward the movable carrier, both ends of the first carrier side portion are provided with a first outer convex portion and a second outer convex portion protruding toward the fixed frame, the first outer convex portion is located between the first frame side portion and the first inner convex portion, the second outer convex portion is located between the first frame side portion and the second inner convex portion, the first support member is located between the first outer convex portion and the first inner convex portion, and the second support member is located between the second outer convex portion and the second inner convex portion.

52. The piezoelectric motor according to claim 51, wherein: A first guide groove is provided on the first inner convex portion, and a second guide groove is provided on the first outer convex portion. The first guide groove and the second guide groove are arranged opposite to each other and cooperate to form a first channel extending along a first direction. The first support member is arranged in the first channel to guide the movement direction of the movable carrier; a first support portion is provided on the second inner convex portion, and a second support portion is provided on the second outer convex portion. The first support portion and the second support portion are arranged opposite to each other and cooperate to form a second channel extending along the first direction. The second support member is arranged in the second channel.

53. The piezoelectric motor according to claim 52, wherein: At least one of the first supporting portion and the second supporting portion is provided with a supporting plane suitable for contacting with the second supporting member, and the second supporting member is suitable for adjusting a position in a direction perpendicular to the first direction along the supporting plane.

54. The piezoelectric motor according to claim 52, wherein: The first support member is disposed in the first channel and is suitable for moving along a first direction. The second support member is disposed in the second channel and is suitable for moving along at least the first direction.

55. The piezoelectric motor according to any one of claims 46 to 48, characterized in that: The driving assembly includes a pre-stressing assembly and an actuating assembly, wherein the pre-stressing assembly is connected to the fixed frame, and the actuating assembly is connected to the pre-stressing assembly, wherein the pre-stressing assembly provides pre-stress to the actuating assembly so that the driving end of the actuating assembly abuts against the movable carrier and the pre-stressing is applied to the movable carrier, so that the actuating assembly is suitable for driving the movable carrier to move relative to the fixed frame when receiving a driving signal.

56. The piezoelectric motor according to claim 55, wherein: The pre-pressing assembly includes a structural member and a buffer member, wherein the structural member is connected to the fixing frame, and the buffer member is arranged between the structural member and the actuating assembly and is suitable for being deformed by being squeezed by the structural member and the actuating assembly.

57. A camera module, characterized in that: include: A piezoelectric motor as described in any one of claims 46 to 56; A lens assembly, disposed in the piezoelectric motor; as well as The photosensitive component is arranged relative to the lens component.

58. A driving device, applied to a camera module, characterized in that: include: Fixed frame; A movable carrier, the movable carrier being movably arranged on the fixed frame; A driving component, the driving component is connected to the fixed frame and abuts against the movable carrier, applies a pre-pressure to the movable carrier, and is suitable for driving the movable carrier to move relative to the fixed frame when receiving a driving signal; A support assembly, wherein the support assembly comprises a first support member and a second support member, wherein the first support member abuts against the fixed frame and the movable carrier respectively, and a certain gap exists between the second support member and the fixed frame and / or the movable carrier.

59. The driving device according to claim 58, characterized in that: The supporting assembly and the driving assembly are arranged on the same side of the driving device.

60. The driving device according to claim 59, characterized in that: The first support member and the second support member are located on the same side of the driving assembly.

61. The drive device according to claim 60, characterized in that: The first support member is closer to the driving assembly than the second support member.

62. The driving device according to claim 59, characterized in that: The first supporting member and the second supporting member are located on two sides of the driving assembly.

63. The driving device according to any one of claims 59 to 62, characterized in that: Along the pre-pressure direction, the first support member, the second support member, and the driving assembly are arranged along a straight line.

64. The driving device according to claim 58, characterized in that: The movable carrier includes a first outer convex portion, the fixed frame includes a first inner convex portion, the first outer convex portion is arranged opposite to the first inner convex portion, and the first support member is arranged between the first outer convex portion and the first inner convex portion.

65. The drive device according to claim 64, characterized in that: The first outer convex portion is provided with a first guide portion, the first inner convex portion is provided with a second guide portion, the two sides of the first support member are respectively in contact with the first guide portion and the second guide portion, and the first guide portion, the second guide portion and the first support member cooperate to guide the movable carrier to move along the first direction.

66. A drive device according to claim 64 or 65, characterized in that: The movable carrier further includes a second outer convex portion, the fixed frame further includes a second inner convex portion, the second outer convex portion and the second inner convex portion are arranged opposite to each other, and the second support member is arranged between the second outer convex portion and the second inner convex portion.

67. The drive device according to claim 66, characterized in that: A third guide portion is provided on the second outer convex portion, a fourth guide portion is provided on the second inner convex portion, the second support member is arranged between the third guide portion and the fourth guide portion, and the third guide portion, the fourth guide portion and the second support member cooperate to provide a certain space for adjustment of the movable carrier.

68. The driving device according to claim 58, characterized in that: The first support member and the second support member are both guide rods, the guide rods are arranged along a first direction, and at least two protrusions suitable for contacting the guide rods are arranged on the movable carrier at intervals along the first direction.

69. The driving device according to claim 58, characterized in that: The driving assembly includes a pre-stressing assembly and an actuating assembly, wherein the pre-stressing assembly is connected to the fixed frame, and the actuating assembly is connected to the pre-stressing assembly, wherein the pre-stressing assembly provides pre-stress to the actuating assembly so that the driving end of the actuating assembly abuts against the movable carrier and the pre-stressing is applied to the movable carrier, so that the actuating assembly is suitable for driving the movable carrier to move relative to the fixed frame when receiving a driving signal.

70. The driving device according to claim 69, characterized in that: The pre-pressing assembly includes a structural member and a buffer member, wherein the structural member is connected to the fixing frame, and the buffer member is arranged between the structural member and the actuating assembly and is suitable for being deformed by being squeezed by the structural member and the actuating assembly.

71. A camera module, characterized in that: include: A driving device as claimed in any one of claims 58 to 70; A lens assembly, arranged in the driving device; as well as The photosensitive component is arranged relative to the lens component.

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