A motor assembly for driving a lens assembly and a camera module

Abstract

The application relates to a motor assembly for driving a lens assembly and a camera module, and belongs to the optical imaging field. The motor assembly for driving the lens assembly comprises a lens carrier for fixing the lens assembly, a support surrounding the lens carrier, a zoom driving assembly for driving the lens carrier to move in a zoom direction, an anti-shake driving assembly for driving the lens assembly to move in an anti-shake plane perpendicular to the zoom direction, and a damping assembly for providing damping force for the movement of the lens carrier. The damping assembly is used to make the motor assembly stable and independent, not affected by external conditions, prolong the service life of the motor assembly, and reduce wear and tear.

Description

Technical Field

[0001] This invention relates to the field of optical imaging, and in particular to motor assemblies and camera modules for driving lens assemblies. Background Technology

[0002] With the widespread adoption of mobile electronic devices, technologies related to camera modules (used to acquire images, such as video or photos) applied to these devices have experienced rapid development and progress. Furthermore, in recent years, camera modules have been widely used in numerous fields such as medical, security, and industrial production. To meet increasingly diverse market demands, high pixel counts, high frame rates, and fast focusing are irreversible development trends for existing camera modules.

[0003] During focusing, the camera module's optical lens moves under the drive of electromagnetic force, locking onto the sharpest image position by comparing the brightness difference between two adjacent positions, and then pulling the optical lens back to that position. At this point, the optical lens should come to rest in that position as quickly as possible. However, due to mechanical limitations, the optical lens inevitably experiences slight oscillations, limiting the improvement in focusing speed.

[0004] Existing OIS (Optical Image Stabilizer) motor assemblies mainly consist of a voice coil motor body and an image stabilization mechanism connected to the voice coil motor body. Existing OIS motor assembly image stabilization mechanisms mainly include translational, tilt-shift, shape memory metal, and suspension wire types; existing motor bodies mainly include a carrier, coil, magnet, upper spring, and lower spring.

[0005] OIS motors using a suspension wire structure typically have a bracket connecting the voice coil motor body. A suspension wire is installed between the bracket and the OIS motor base, and the deflection and vibration reduction function of the voice coil motor body is achieved by extending and retracting the suspension wire.

[0006] To prevent the voice coil motor from vibrating after the suspension cable extends or retracts, damping adhesive is typically used to further dampen the vibration. This adhesive is located between the bracket and the base, specifically at the corners of the base. During motor cleaning and vibration, the damping adhesive is prone to splattering and detachment, easily resulting in it adhering to the outer wall of the bracket. During OIS (Optical Image Stabilization) operation, the adhesive on the bracket's side wall comes into contact with the outer casing (surrounding components). Even after curing, the adhesive retains some stickiness. Because the OIS motor is small and lightweight, even a small force exerted between the adhesive and the casing or surrounding components can significantly impact the OIS motor's vibration stabilization performance, leading to product defects and poor stability.

[0007] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. The motor assembly and camera module for driving lens assembly proposed in this application aim to solve many problems existing in the prior art. Summary of the Invention

[0008] To address the aforementioned technical problems, the purpose of this application is to provide a motor assembly and camera module for driving a lens assembly. This application utilizes the combined action of an electromagnetic damping conductor and a magnet to provide a damping force that impedes the movement of the optical lens in the zoom direction and in a plane perpendicular to the zoom direction, thereby achieving fast and stable focusing of the motor assembly while maintaining stable damping effects unaffected by external environmental factors. Simultaneously, it allows for more flexible and versatile application of the damping conductor in the motor assembly. This effectively solves or alleviates one or more of the aforementioned problems and other issues present in the prior art.

[0009] Therefore, according to a first aspect of this application, a motor assembly for driving a lens assembly is provided, the motor assembly comprising:

[0010] Lens carrier, used to fix lens components;

[0011] A bracket surrounding the lens carrier;

[0012] A zoom drive assembly is used to drive the lens carrier to move along the zoom direction;

[0013] An image stabilization drive assembly is used to drive the lens assembly to move in an image stabilization plane perpendicular to the zoom direction, and

[0014] A damping assembly is used to provide damping force for the movement of the lens carrier.

[0015] According to some embodiments of the first aspect of this application, the zoom drive assembly includes:

[0016] At least one zoom drive magnet is fixed to the bracket;

[0017] At least one zoom drive coil is fixed on the lens carrier and is located in the magnetic field of the at least one zoom drive magnet, so that when the at least one zoom drive coil is energized, a driving force can be generated on the at least one zoom drive coil fixed on the lens carrier through electromagnetic action.

[0018] According to some embodiments of the first aspect of this application, the zoom drive assembly further includes:

[0019] Upper spring,

[0020] Lower spring,

[0021] The lens carrier and the support surrounding the lens carrier are held between the upper and lower springs.

[0022] According to some embodiments of the first aspect of this application, the upper spring and the lower spring respectively include:

[0023] Inner frame,

[0024] Outer frame, and

[0025] A flexible spring wire elastically connects the inner frame and the outer frame, allowing relative movement between the inner and outer frames.

[0026] The upper surface of the lens carrier is connected to the inner frame of the upper spring, and the lower surface of the lens carrier is connected to the inner frame of the lower spring.

[0027] The upper surface of the bracket surrounding the lens carrier is connected to the outer frame of the upper spring, and the lower surface of the bracket surrounding the lens carrier is connected to the outer frame of the lower spring.

[0028] According to some embodiments of the first aspect of this application, the upper spring is made of a conductive material, wherein the spring wire of the upper spring is electrically connected to the outer frame and the inner frame of the upper spring, and the inner frame of the upper spring is electrically connected to the zoom drive coil fixed on the lens carrier.

[0029] According to some embodiments of the first aspect of this application, the damping component includes:

[0030] At least one zoom damping magnet is fixed to the bracket;

[0031] At least one zoom damping conductor is fixed to the lens carrier and is located in the magnetic field of the at least one zoom damping magnet, so that when the at least one zoom damping magnet fixed to the bracket and the at least one zoom damping conductor fixed to the lens carrier move relative to each other, a damping force that opposes the movement of the lens carrier can be generated on the at least one zoom damping conductor fixed to the lens carrier through electromagnetic action.

[0032] According to some embodiments of the first aspect of this application, the at least one zoom damping magnet is fixed on the support between the lens carrier and the support surrounding the lens carrier, the at least one zoom damping conductor is fixed on the lens carrier between the lens carrier and the support surrounding the lens carrier, and the positions of the at least one zoom damping magnet and the at least one zoom damping conductor are opposite to each other.

[0033] According to some embodiments of the first aspect of this application, the zoom damping conductor is a hollow or solid conductor sheet.

[0034] According to some embodiments of the first aspect of this application, the motor assembly further includes:

[0035] Base, and

[0036] A housing, which is fixed to the base and forms a receiving cavity with the base, wherein the zoom drive assembly is housed in the receiving cavity.

[0037] According to some embodiments of the first aspect of this application, the image stabilization drive component includes:

[0038] At least one suspension line, one end of which is electrically connected to the base and the other end of which is electrically connected to the outer frame of the upper spring of the zoom drive assembly.

[0039] According to some embodiments of the first aspect of this application, the suspension line is made of metal wire and is capable of providing restoring force in the image stabilization plane perpendicular to the zoom direction.

[0040] According to some embodiments of the first aspect of this application, the base has conductive pins that are electrically connected to an external circuit, wherein the suspension wire electrically connects the outer frame of the upper spring to the conductive pins of the base.

[0041] According to some embodiments of the first aspect of this application, the image stabilization drive component further includes:

[0042] At least one anti-shake drive magnet is fixed to the bracket;

[0043] At least one anti-shake drive coil is fixed on the base and is in the magnetic field of the at least one anti-shake drive magnet, so that when the at least one anti-shake drive coil is energized, it can generate a driving force on the at least one anti-shake drive magnet fixed on the bracket through electromagnetic action.

[0044] According to some embodiments of the first aspect of this application, the zoom drive magnet is used as the zoom damping magnet.

[0045] According to some embodiments of the first aspect of this application, the zoom drive magnet or the zoom damping magnet is used as the image stabilization drive magnet.

[0046] According to some embodiments of the first aspect of this application, at least one image stabilization drive coil is arranged in two perpendicular directions in the image stabilization plane perpendicular to the zoom direction.

[0047] According to some embodiments of the first aspect of this application, the damping component further includes:

[0048] At least one anti-shake damping magnet is fixed to the bracket;

[0049] At least one anti-shake damping conductor is fixed on the base and is in the magnetic field of the at least one anti-shake damping magnet, so that when the at least one anti-shake damping magnet fixed on the bracket and the at least one anti-shake damping conductor fixed on the base move relative to each other, a damping force that opposes the movement can be generated on the at least one anti-shake damping magnet fixed on the bracket through electromagnetic action.

[0050] According to some embodiments of the first aspect of this application, the anti-shake driving magnet is used as the anti-shake damping magnet.

[0051] According to some embodiments of the first aspect of this application, the zoom drive magnet or the zoom damping magnet is used as the image stabilization damping magnet.

[0052] According to some embodiments of the first aspect of this application, at least one image stabilization damping conductor is arranged in two perpendicular directions in the image stabilization plane perpendicular to the zoom direction.

[0053] According to some embodiments of the first aspect of this application, the image stabilization damping conductor and the image stabilization drive coil are uniformly distributed around the lens carrier on the base of the motor.

[0054] According to some embodiments of the first aspect of this application, the housing is made of a magnetically conductive material.

[0055] According to some embodiments of the first aspect of this application, the housing has a plurality of protrusions extending parallel to the zoom direction.

[0056] According to some embodiments of the first aspect of this application, the motor assembly further includes a displacement sensor for detecting displacement of the lens carrier.

[0057] According to a second aspect of this application, a camera module is provided, the camera module comprising:

[0058] The motor assembly as described above;

[0059] The lens assembly is fixed in the lens carrier of the motor assembly, and

[0060] Photosensitive chip. Attached Figure Description

[0061] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments. In the drawings, unless otherwise specified, the same reference numerals are used to denote the same parts. Wherein:

[0062] Figure 1 A schematic diagram of an embodiment of a motor assembly according to the present invention;

[0063] Figure 2 A schematic diagram of the motor assembly structure with the motor housing concealed.

[0064] Figure 3 A schematic diagram of the voice coil motor structure in the motor assembly;

[0065] Figure 4 Top view of the voice coil motor structure of the motor assembly;

[0066] Figure 5 Bottom view of the voice coil motor structure of the motor assembly;

[0067] Figure 6 A schematic diagram of the lens carrier, conductor, and coil structure;

[0068] Figure 7 A schematic diagram of the motor base, conductors, and coils;

[0069] Figure 8 A schematic diagram illustrating the interaction between a magnet, a conductor, and a coil;

[0070] Figure 9 A vibration damping effect curve comparing the motor assembly of the present invention with the prior art.

[0071] List of reference numerals in the attached diagram:

[0072] 11.A magnet

[0073] 12.B Magnet

[0074] 13.C magnet

[0075] 14.D Magnet

[0076] 21. Zoom drive coil

[0077] 22. Variable zoom damping conductor

[0078] 31. Anti-shake drive coil

[0079] 32. Anti-shake damping conductor

[0080] 41. Outer shell

[0081] 42. Base

[0082] 43. Lens

[0083] 44. Conductive pin

[0084] 51. Lens carrier

[0085] 52. Bracket

[0086] 61. Upper spring

[0087] 62. Lower spring

[0088] 63. Spring wire

[0089] 64. Suspension line

[0090] 65. Metal parts Detailed Implementation

[0091] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments only relate to a portion of the implementations of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments disclosed in this application without creative effort are within the scope of protection of this application. The terms "comprising" and "having," and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion. For example, a process, method, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not specifically listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0092] Those skilled in the art should understand that in the description of this application and the claims, the orientation or positional relationship indicated by certain terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device, mechanism, structure or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this application.

[0093] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this term in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0094] Traditional mechanical damping structures, such as damping adhesives, silicone rubber, and foam, provide damping through compression or friction to achieve rapid stabilization. However, traditional mechanical damping, such as damping adhesives, has the following drawbacks:

[0095] 1) The damping effect is unstable, and different amounts of adhesive need to be adjusted and verified to achieve the expected damping effect. The distribution / curing state of the damping adhesive and the gap changes of the damping structure have a great impact on the damping effect. The damping effect varies greatly between different products, the quality stability is poor, and the requirements for subsequent debugging are high.

[0096] 2) As the service life increases, the mechanical damping properties will change (aging), affecting the damping effect;

[0097] 3) Mechanical damping is greatly affected by external environmental factors such as temperature and humidity. For example, the damping effect will change after high temperature and high humidity tests.

[0098] 4) After being dropped or impacted, the mechanical damping rubber may break or detach, causing the motor to fail and preventing normal focusing.

[0099] To overcome at least one of the disadvantages of the prior art, the present invention provides a motor assembly for driving a lens assembly and a camera module. The motor assembly for driving the lens assembly includes a lens carrier 51 for fixing the lens assembly, a bracket 52 surrounding the lens carrier 51, a zoom drive assembly for driving the lens carrier 51 to move along a zoom direction, an image stabilization drive assembly for driving the lens assembly to move in an image stabilization plane perpendicular to the zoom direction, and a damping assembly for providing damping force for the movement of the lens carrier 51.

[0100] The motor assembly for driving a lens assembly provided by the present invention can achieve at least one of the following advantages:

[0101] 1) Electromagnetic damping is quantifiable, meaning that the damping force can be calculated directly through calculation and simulation to achieve the desired damping effect;

[0102] 2) The damping effect is stable. The electromagnetic damping component is composed of conductors and magnets. Once the design or assembly is completed, the damping force is determined. It has good consistency, with almost no difference between products, high quality stability, and low requirements for later debugging.

[0103] 3) Unaffected by external environmental conditions, the electromagnetic damping effect remains almost unchanged within the normal operating environment of the motor components, and there is no risk of aging.

[0104] 4) The contactless nature of the electromagnetic damping component results in high mechanical stability. Within the reliability conditions that the motor can withstand, the electromagnetic damping component remains unaffected.

[0105] 5) The electromagnetic damping component enables the motor component to focus quickly, stabilize images quickly, and reduce crosstalk. At the same time, it provides a more stable, independent damping structure and form that is not affected by external conditions.

[0106] 6) It can improve the dynamic response of the system.

[0107] Figure 1This is a schematic diagram of an embodiment of a motor assembly according to the present invention. The motor assembly includes a housing 41, a base 42, and a movable component within a hollow cavity. The housing 41 is located above and connected to the base 42. The housing 41 and the base 42 form a cavity in which the movable component is housed. The movable component includes a lens carrier 51, a support 52 surrounding the lens carrier 51, a zoom drive assembly for driving the lens carrier 51 to move along the zoom direction, an image stabilization drive assembly for driving the lens assembly to move in an image stabilization plane perpendicular to the zoom direction, and a damping assembly for providing damping force for the movement of the lens carrier 51. The movable component can move within the active space formed by the cavity. The movable component can both drive the lens assembly to move along the zoom direction to achieve the focusing function of the motor assembly and drive the lens assembly to move in an image stabilization plane perpendicular to the zoom direction to achieve the image stabilization function of the motor assembly.

[0108] like Figure 1 In one embodiment of the motor assembly shown, the housing 41 serves a supporting and protective function. The housing 41 and the base 42 are interlocked and fixed together. For example, corresponding clips can be provided on the bottom of the housing 41 and the edge of the base 42, and the number of clips can be selected according to the actual production application requirements. This design and assembly makes the motor assembly more secure and stable during assembly, enhancing the overall reliability of the motor assembly. Similarly, other methods such as bonding, welding, or fusion can also be used to combine the housing 41 and the base 42. While ensuring a secure and stable connection between the two, this provides a more stable movement space for movable parts within the cavity, resulting in higher overall stability of the motor assembly.

[0109] One consideration is to use a magnetically permeable material for the motor housing 41. High magnetic permeability refers to a material with a permeability of approximately 10⁻⁶. 2 The above-mentioned ferromagnetic materials are also known as soft magnetic materials. The preferred ferromagnetic or soft magnetic materials are one or more combinations of iron, nickel, and cobalt. Materials with high magnetic permeability, high saturation magnetic induction, high resistance, low loss, and good stability enhance the stability of the motor assembly, improving the overall stability and reliability of the motor assembly's zoom and image stabilization. Furthermore, the housing 41 is provided with multiple protrusions, for example four, extending parallel to the zoom direction, which helps retain magnetism and strengthen magnetic force.

[0110] Preferably, in Figure 1In one embodiment of the motor assembly shown, the base 42 is made of plastic and manufactured using an injection molding process. The base 42 is provided with conductive pins 44 for electrical connection to external circuitry. In traditional connection methods, components such as the drive motor are connected to the circuit board via separate wires, resulting in a relatively complex manufacturing process. This invention, however, preferably processes the conductive pins 44 during injection molding, replacing traditional motor welding processes and making the circuit connection more stable. This design also allows the motor assembly to form an integrated structure, eliminating the need for circuit boards for connections between internal components. This simplifies assembly, improves precision and yield, ensures stable finished products, and further enables component miniaturization.

[0111] It should be noted that the number or material of the conductive pins 44 is not limited, and those skilled in the art can set them reasonably according to actual production applications. For example, multiple metal conductive pins 44 can be set to prevent damage to one of the conductive pins 44 from affecting the working efficiency of the overall motor assembly and to ensure the stability of the connection between the motor assembly and the external circuit.

[0112] Figure 2 This is a schematic diagram of the motor assembly structure with the outer casing 41 removed to clearly illustrate the internal structure. Movable components are housed within the cavity formed by the outer casing 41 and the base 42. These movable components include, for example, a lens carrier 51 and a support 52 surrounding the lens carrier 51. Figure 2 As shown, the lens carrier 51 is hollow, meaning it has a hollow portion to accommodate and support the lens assembly. Corresponding threaded structures can be configured between the lens carrier 51 and the lens assembly, allowing the lens assembly to be screwed into the lens carrier 51. Alternatively, a threadless structure can be used, for example, by using adhesive to bond the lens 43 of the lens assembly to the lens carrier 51. Or, a combination of threaded structures and adhesive can be used to fix the lens 43 to the lens carrier 51. Advantageously, the lens carrier 51 is spaced apart from the housing 41 and the base 42, meaning it does not directly contact the housing 41 and the base 42. This allows for more flexible movement of the lens carrier 51 and the lens assembly it supports, adapting to various application scenarios.

[0113] A support 52 is provided in the receiving cavity formed by the outer side of the lens carrier 51 and the inner side of the outer shell 41. The support 52 is arranged around the lens carrier 51, suspending the lens carrier 51 and the lens 43. In some embodiments, the support 52 can be a rectangular or square frame. Alternatively, the support 52 can be a circular frame arranged around the lens carrier 51. The support 52 suspends the lens carrier 51 and the lens assembly, for example, through a spring structure, which will be described in detail below.

[0114] It should be noted that the lens carrier 51 is made of plastic, and the bracket 52 is usually made of the same material as the lens carrier 51. Both can be processed by injection molding, thereby enhancing the durability of the overall motor assembly.

[0115] Furthermore, the motor assembly includes a zoom drive assembly and an image stabilization drive assembly.

[0116] The zoom drive assembly includes at least one zoom drive magnet fixed to the bracket 52 and at least one zoom drive coil 21 fixed to the lens carrier 51. In some embodiments shown, see, for example, [reference needed]. Figure 8 A zoom drive magnet 12 and 14 are respectively arranged on two opposite sides of the bracket 52, and a zoom drive coil 21 is respectively arranged on two opposite sides of the lens carrier 51. The zoom drive magnet provides a magnetic field, so that when the zoom drive coil 21 is energized, a driving force is generated on the zoom drive coil 21 through electromagnetic action, thereby driving the lens carrier 51 and the lens assembly to zoom, realizing the zoom function of the motor assembly.

[0117] The image stabilization drive assembly includes at least one image stabilization drive magnet fixed to the bracket 52 and at least one image stabilization drive coil 31 fixed to the base 42. In some embodiments shown, see, for example, [reference needed]. Figure 7 and Figure 8 An image stabilization drive magnet 13 and 14 are respectively arranged on two adjacent sides of the bracket 52, and an image stabilization drive coil 31 is respectively arranged on two corresponding adjacent sides of the base 42. The image stabilization drive magnet provides a magnetic field, so that when the image stabilization drive coil 31 is energized, a driving force is generated on the image stabilization drive magnet through electromagnetic action. The resulting driving force causes the lens carrier 51 and the lens assembly to move in the image stabilization plane perpendicular to the zoom direction, thereby realizing the image stabilization function of the motor assembly.

[0118] Figure 3 This is a schematic diagram of the voice coil motor structure in a motor assembly. (In...) Figure 3 In the illustrated embodiment, the zoom drive assembly of the motor assembly further includes a spring for resiliently clamping the lens carrier 51, for example... Figure 3The upper spring 61 and lower spring 62 are shown. Both the upper spring 61 and lower spring 62 are elastic and can be made of metal (generally a metal alloy). The upper spring 61 and lower spring 62 each include an inner frame and an outer frame, as well as an elastic spring wire 63. The spring wire 63 elastically connects the inner and outer frames of the upper spring 61 and lower spring 62. The rebound force provided by the spring wire 63 enables relative movement between the inner and outer frames of the upper spring 61 and lower spring 62, for example, relative movement in the zoom direction, and allows them to return to the same plane using the elastic restoring force provided by the spring wire 63.

[0119] Here, the upper spring 61 and the lower spring 62 elastically clamp the lens carrier 51, serving to support the lens carrier 51 and provide restoring force. In the illustrated embodiment, the outer frame of the upper spring 61 is connected to the upper surface of the bracket 52, and the inner frame of the upper spring 61 is connected to the upper surface of the lens carrier 51. The inner and outer frames are elastically connected by the spring wire 63 of the upper spring 61. The outer frame of the lower spring 62 is connected to the lower surface of the bracket 52, and the inner frame of the lower spring 62 is connected to the lower surface of the lens carrier 51. The inner and outer frames are elastically connected by the spring wire 63 of the lower spring 62.

[0120] The movement range of the lens carrier 51 is limited by the elastic clamping of the upper spring 61 and the lower spring 62, so as to prevent the lens carrier 51 and the lens assembly on it from being damaged due to collision with the outer shell 41 or the base 42 when the motor assembly moves or is subjected to external impact.

[0121] It should be noted that the upper spring 61 is made of conductive material, wherein the spring wire 63 of the upper spring 61 is electrically connected to the outer frame and the inner frame of the upper spring 61, and the inner frame of the upper spring 61 is electrically connected to the zoom drive coil 21 fixed on the lens carrier 51.

[0122] It should be noted that, as described above, the connection method between the upper spring 61, the lower spring 62 and the lens carrier 51, the bracket 52, etc., is preferably adhesive bonding or thermal riveting. Other connection methods in the art that can achieve the same technical effect as alternatives can be adopted. Those skilled in the art can select the most suitable connection method according to actual production applications to improve the stability and service life of the motor assembly.

[0123] Furthermore, the anti-shake drive assembly of the motor assembly also includes at least one suspension cable 64. In such a case... Figure 3 In the illustrated embodiment, for example, four suspension lines 64 are disposed at the four corners of the bracket 52. One end of each suspension line 64 is electrically connected to the base 42, and the other end is electrically connected to the outer frame of the upper spring 61 of the zoom drive assembly.

[0124] The suspension line 64 is made of high-strength, resilient, and conductive metal wire, and can support the upper spring 61 in the zoom direction, especially the entire voice coil motor, and can provide restoring force in the image stabilization plane perpendicular to the zoom direction.

[0125] In such Figure 4 As shown in the top view of the voice coil motor structure of the motor assembly, metal parts 65 can be provided at one or both ends of the suspension wire 64. The upper metal part 65 can be electrically connected to the outer frame of the upper spring 61, and the lower metal part 65 can be electrically connected to the base 42 or a circuit board arranged on the base 42. For example, a suspension wire 64 has one metal part 65 at each end, and the function of the metal parts 65 is to enhance the reliability of the electrical connection between the suspension wire 64 and the two ends. Here, the suspension wire 64 and the metal parts 65 at both ends can be connected by solder ball welding. Other connection methods in the art that can achieve the same technical effect as alternatives can also be used. Those skilled in the art can select the most suitable connection method according to actual production applications to improve the stability and service life of the motor assembly.

[0126] It should be noted that the suspension lines 64 are positioned at the four corners of the bracket 52. Therefore, preferably, the bracket 52 has a clearance structure, such as a notch structure, for avoiding the suspension lines 64. In some embodiments shown, a clearance structure is provided at each of the four corners of the bracket 52, corresponding, for example, to the number of suspension lines 64, such as... Figure 3 The bracket 52 shown has semi-circular notches at the four corners to provide ample space for the suspension line 64 to move, avoiding interference and affecting the performance of the motor assembly.

[0127] Thus, through the electrical connection at both ends of the suspension wire 64, the drive coil in the motor assembly is electrically connected to the external circuit. For example, it can be controlled by the external circuit, in which a closed circuit loop is formed by the conductive pin 44 on the base 42, the suspension wire 64, the outer frame of the upper spring 61, the spring wire of the upper spring 61, the inner frame of the upper spring 61, the drive coil, etc., thereby controlling the drive current of the drive coil of the motor assembly, thereby enabling the lens carrier 51 of the drive motor assembly and the lens assembly carried by the lens carrier 51 to perform zoom movement.

[0128] Furthermore, the motor assembly also includes a damping component for providing damping force to the movement of the lens carrier 51. Such a damping component includes, for example, a zoom damping component for providing damping force to zoom movement, and / or an optical image stabilization damping component for providing damping force to optical image stabilization movement.

[0129] After the drive component provides driving force and stops driving, the movable part, such as the lens carrier 51 along with the lens assembly or the entire voice coil motor, will continue to move in the zoom direction or the optical image stabilization direction due to inertia instead of stopping immediately. At this time, the damping force provided by the damping component will provide resistance to the inertial movement of the movable part. Resistance is always applied during its inertial displacement, so that its inertial displacement can stop more quickly, reducing the number of reciprocating movements due to inertia, thereby reducing the required time and achieving rapid stabilization during focusing and optical image stabilization.

[0130] The zoom damping assembly includes at least one zoom damping magnet fixed to the bracket 52 and at least one zoom damping conductor 22 fixed to the lens carrier 51. In some embodiments shown, see, for example, [reference needed]. Figure 8 A zoom damping magnet 11 and 13 are respectively arranged on two opposite sides of the bracket 52, and a zoom damping conductor 22 is respectively arranged on two opposite sides of the lens carrier 51. The zoom damping magnet provides a magnetic field, and the zoom damping conductor 22 is constructed as a hollow or solid conductor sheet. Thus, when the zoom damping magnet and the zoom damping conductor 22 move relative to each other, electromagnetic damping that obeys Lenz's law can generate a damping force on the zoom damping conductor 22 that always opposes the movement of the lens carrier 51.

[0131] The at least one zoom damping magnet is fixed on the support 52 between the lens carrier 51 and the support 52 surrounding the lens carrier 51, and the at least one zoom damping conductor 22 is fixed on the lens carrier 51 between the lens carrier 51 and the support 52 surrounding the lens carrier 51, and the positions of the at least one zoom damping magnet and the at least one zoom damping conductor 22 are opposite to each other.

[0132] The optical image stabilization damping assembly includes at least one image stabilization damping magnet fixed to the bracket 52 and at least one image stabilization damping conductor 32 fixed to the base 42. In some embodiments shown, see, for example, [reference needed]. Figure 7 and Figure 8An anti-shake damping magnet 11 and 12 are respectively arranged on two adjacent sides of the bracket 52, and an anti-shake damping conductor 32 is respectively arranged on two corresponding adjacent sides of the base 42. The anti-shake damping magnet provides a magnetic field, so that when the anti-shake damping magnet and the anti-shake damping conductor 32 move relative to each other, an electromagnetic damping force that always opposes, for example, the movement of the entire voice coil motor can be generated on the anti-shake damping magnet through the electromagnetic damping action that conforms to Lenz's law. The voice coil motor includes components such as the lens carrier 51, the lens assembly carried in the lens carrier 51, and the bracket 52 that supports the lens carrier 51 through a spring structure. During optical image stabilization, the entire voice coil motor including these components moves in an optical image stabilization plane, for example, perpendicular to the zoom direction. Through the optical image stabilization damping assembly, a damping force that always opposes, for example, the movement of the entire voice coil motor can be provided in any direction within the optical image stabilization plane.

[0133] In such Figure 5 In the bottom view of the voice coil motor structure of the motor assembly shown, four magnets are provided to provide the magnetic field. These are magnet A 11, magnet B 12, magnet C 13, and magnet D 14. These magnets are generally made of neodymium iron boron permanent magnet material through powder sintering, and are used to provide a fixed permanent magnetic field. The four magnets are located inside the bracket 52 and are generally bonded to the inner walls of the four sides of the bracket 52 with adhesive.

[0134] exist Figure 5 In the illustrated embodiment, four magnets are arranged on one side of a square support 52, preferably in a cuboid shape. It is worth noting that the shape and type of the magnets are not limited. The use of a cuboid shape is merely illustrative. Without departing from the scope of this application, other suitable magnets capable of providing a magnetic field can be used according to actual production and specific implementation needs.

[0135] Figure 6 This is a schematic diagram of the lens carrier 51, on which a zoom damping conductor 22 and a zoom drive coil 21 are provided. Figure 6 The schematic diagram shows two zoom drive coils 21 and two zoom damping conductors 22 arranged opposite to each other on the lens carrier 51. In some embodiments, the lens carrier 51 may be provided with structures for fixing the zoom damping conductors 22 and / or the zoom drive coils 21, such as protrusions or recesses. Preferably, there are two protrusions or recesses, and the two protrusions or two recesses are arranged opposite to each other around the lens carrier 51.

[0136] In some embodiments, the zoom drive coil 21 needs to be energized, for example, by introducing a power line or through the conductive pin 44 of the motor assembly, in order to achieve the driving function. The zoom drive coil 21 is generally made of self-adhesive enameled wire, and as an energized conductor, it is subjected to force in the magnetic field provided by the magnet, generating thrust, thereby pushing the lens 43 to move. In some embodiments, the zoom drive coil 21 is wound around the periphery of the lens carrier 51, for example, wound around a protrusion provided on the lens carrier 51 as described above. That is, the two zoom drive coils 21 are arranged opposite each other around the lens carrier 51 on the protrusion of the lens carrier 51.

[0137] It should be noted that the connection method of the drive coil on the protrusion is not limited. For example, it can be fixed by adhesive, winding or other methods. Those skilled in the art can choose a suitable and more stable connection method for reasonable arrangement according to actual production or needs.

[0138] In some embodiments, the zoom damping conductor 22 may include at least one metal sheet. The zoom damping conductor 22 may be embedded in the periphery of the lens carrier 51, for example, in a recess provided on the lens carrier 51 as described above. That is, the two zoom damping conductors 22 are disposed opposite to each other in the recess of the lens carrier 51 around the lens carrier 51.

[0139] It should be noted that the connection method of the damping conductor in the recess is not limited. For example, it can be fixed by adhesive, embedding or other methods. Those skilled in the art can choose a suitable and more stable connection method for reasonable arrangement according to actual production or needs.

[0140] Particularly preferred is that the zoom damping conductor 22 may also include at least one metal sheet with a central opening, i.e., a hollow sheet in the shape of a ring or other hollow sheet. Of course, in other embodiments, the zoom damping conductor 22 may be a solid metal sheet, i.e., a non-hollow sheet. Using a solid metal sheet is simple in structure and can achieve better damping effect. Since it is advantageous to calculate the resistance according to a fixed calculation formula for a metal sheet with a central opening (similar to a ring shape), while for a metal sheet without a central opening, the resistance is obtained by integration, the magnitude of the damping force can be calculated more accurately for a metal sheet with a central opening, i.e., a metal sheet with a ring-like structure, allowing for a more accurate determination of the required damping force from both design and calculation perspectives.

[0141] Since the zoom damping component and the zoom drive component are not physically connected, the resistance is not provided by increasing the friction between the two, but by generating a damping force through an electromagnetic field. This makes up for the shortcomings of damping materials such as damping rubber, which are easy to wear, have limited service life, and have unstable damping effect.

[0142] It should be noted that the zoom drive coil 21 and the zoom damping conductor 22 are made of metal or alloy materials with high conductivity and low resistivity, such as copper / copper alloy, silver / silver alloy, etc. Without departing from the scope of this application, other suitable conductive coils or conductors in the art may be used according to the actual production and specific implementation needs.

[0143] It should also be noted that the connection method between the zoom drive coil 21 and the zoom damping conductor 22 and the lens carrier 51 is not limited to the connection method described above. For example, the lens carrier 51 is not limited to having two protrusions and two recesses around its perimeter. Other fixed structures, such as four protrusions or four recesses, corresponding to the number of zoom drive coils 21 and zoom damping conductors 22, can also be used. In actual production applications, a more suitable arrangement can be flexibly selected to improve the flexibility, stability, and other performance characteristics of the motor assembly.

[0144] Figure 7 This is a structural diagram of the motor base 42, conductors, and coil. For clarity, the outer casing and voice coil motor, among other components, have been removed. Figure 7 In the schematic diagram shown, at least one image stabilization drive coil 31 and at least one image stabilization damping conductor 32 are arranged on the base 42. Preferably, in the optical image stabilization plane, for example in the optical image stabilization plane perpendicular to the zoom direction, at least one image stabilization drive coil 31 and at least one image stabilization damping conductor 32 are respectively arranged in two perpendicular directions. Thus, by reasonably controlling and distributing the coil drive current in the two perpendicular directions, the desired optical image stabilization drive force and damping force can be formed in any direction in the plane through the resultant force in each direction.

[0145] In some embodiments, the base 42 may be provided with structures for fixing the image stabilization drive coil 31 and the image stabilization damping conductor 32, such as protrusions and / or recesses. Preferably, there are two protrusions or two recesses, and the two protrusions or two recesses are arranged adjacent to each other around the lens carrier 51. Preferably, at least one image stabilization drive coil 31 is arranged in two perpendicular directions in the image stabilization plane perpendicular to the zoom direction.

[0146] In such Figure 7 In the illustrated embodiment, the anti-shake drive coil 31 is configured as an elliptical metal coil with a major axis, i.e., a so-called racetrack-shaped coil, wherein the major axes of the metal coil are perpendicular to each other in the anti-shake plane, providing driving force for the anti-shake drive motion of the motor assembly.

[0147] The anti-shake damping conductor 32 is configured as an elliptical metal sheet with a major axis, the major axes of which are perpendicular to each other in the anti-shake plane, providing damping force for the anti-shake drive motion.

[0148] In some embodiments, the image stabilization drive coil 31 needs to be energized, for example, by introducing a power line or through the conductive pin 44 of the motor assembly, in order to achieve the driving function. The image stabilization drive coil 31 is generally made of self-adhesive enameled wire, and as a current-carrying conductor, it is subjected to force in the magnetic field provided by the magnet, thereby driving the voice coil motor together with the driving lens 43 to move in the image stabilization plane perpendicular to the zoom direction. Here, since one end of the suspension wire 64 is electrically connected to the base 42 and the other end is electrically connected to the outer frame of the upper spring 61 of the zoom drive assembly, the suspension wire 64 not only serves as an electrical connection, but also provides mechanical support and restoring force to the entire suspended voice coil motor structure.

[0149] In some embodiments, the anti-shake drive coil 31 is disposed on the base 42, and as described above, the base 42 may be provided with a protrusion for fixing the anti-shake drive coil 31. Preferably, the two anti-shake drive coils 31 are disposed adjacently on the protrusion, particularly wound around the base 42.

[0150] It should be noted that the connection method of the anti-shake drive coil 31 to the protrusion is not limited. For example, it can be fixed by adhesive, snap-fit ​​or other methods. Those skilled in the art can choose a suitable and more stable connection method for reasonable arrangement according to actual production or needs.

[0151] In some embodiments, the image stabilization damping conductor 32 may include at least one metal sheet. The image stabilization damping conductor 32 may be embedded in the base 42, for example, a recess may be provided on the base 42 as described above for fixing the image stabilization damping conductor 32. Preferably, the two image stabilization damping conductors 32 are disposed adjacent to each other on the recess of the lens carrier 51.

[0152] It should be noted that the connection method of the anti-shake damping conductor 32 in the recess is not limited. For example, it can be fixed by adhesive, embedding or other methods. Those skilled in the art can choose a suitable and more stable connection method for reasonable arrangement according to actual production or needs.

[0153] Particularly preferred is that the anti-shake damping conductor 32 may also include at least one metal sheet with a central opening, i.e., a hollow sheet in the shape of a ring or other hollow sheet. Of course, in other embodiments, the anti-shake damping conductor 32 may include a solid metal sheet, i.e., a non-hollow sheet. Using a solid metal sheet simplifies the structure and achieves better damping effect. Since it is advantageous to calculate the resistance using a fixed formula for a metal sheet with a central cavity (similar to a ring shape), while the resistance is obtained by integration for a metal sheet without a central cavity, the magnitude of the damping force can be calculated more effectively for a metal sheet with a central opening, i.e., a metal sheet with a ring-like structure. This allows for a more accurate determination of the required damping force from both design and calculation perspectives.

[0154] Since the anti-shake damping component and the anti-shake drive component are not physically connected, and the resistance is not provided by increasing the friction between the two, but by generating a damping force through an electromagnetic field, the resistance is provided. This makes up for the shortcomings of damping materials such as damping rubber, which are easy to wear, have limited service time, and have unstable damping effect.

[0155] It should be noted that the anti-shake drive coil 31 and the anti-shake damping conductor 32 are made of metal or alloy materials with high conductivity and low resistivity, such as copper / copper alloy, silver / silver alloy, etc. Furthermore, the anti-shake drive coil 31 and the anti-shake damping conductor 32 are not limited to elliptical conductive coils or conductors. Without departing from the scope of this application, other suitable conductive coils or conductors in the art can be used according to the needs of actual production and specific implementation.

[0156] It should also be noted that the connection method between the anti-shake drive coil 31 and the anti-shake damping conductor 32 and the base 42 is not limited to the connection method described above. In actual production applications, a more suitable arrangement method can be flexibly selected to improve the flexibility, stability, and other performance characteristics of the motor assembly.

[0157] It should be noted that the zoom drive, zoom damping, image stabilization drive, and image stabilization damping in the motor assembly each include at least one conductor and one magnet for providing a magnetic field. The magnets used for different purposes can be set up individually or shared.

[0158] In some embodiments, the zoom drive assembly in the motor assembly includes two zoom drive coils 21 and two zoom drive magnets, which are respectively a first zoom drive coil, a second zoom drive coil, a first zoom drive magnet, and a second zoom drive magnet.

[0159] In some embodiments, the zoom damping assembly in the motor assembly includes two zoom damping conductors 22 and two zoom damping magnets, which are respectively a first zoom damping conductor, a second zoom damping conductor, a first zoom damping magnet, and a second zoom damping magnet.

[0160] In some embodiments, the anti-shake drive assembly in the motor assembly includes two anti-shake drive coils 31 and two anti-shake drive magnets, which are respectively a first anti-shake drive coil, a second anti-shake drive coil, a first anti-shake drive magnet, and a second anti-shake drive magnet.

[0161] In some embodiments, the anti-shake damping component in the motor assembly includes two anti-shake damping coils and two anti-shake damping magnets, which are respectively a first anti-shake damping coil, a second anti-shake damping coil, a first anti-shake damping magnet, and a second anti-shake damping magnet.

[0162] Therefore, it is advisable to share magnets for some components to reduce the number of magnets in the motor assembly, which reduces costs in actual production applications and improves the stability and reliability of the motor assembly.

[0163] For example, in such Figure 8 In the schematic diagram showing the interaction between the magnet and the conductor, other obstructing components have been removed for clarity. It should be noted that... Figure 8 It is only used to express the relative positional relationship between the magnet and components such as the coil and conductor, wherein the magnet is fixed on the bracket 52 which is not shown, and therefore has no supporting or fixed connection with the components shown.

[0164] exist Figure 8 In the embodiment shown, the magnet is constructed as four cuboid magnets, which are referred to here as magnet A 11, magnet B 12, magnet C 13 and magnet D 14 for ease of explanation.

[0165] Preferably, the A magnet 11 can serve as both the first zoom damping magnet and the first image stabilization damping magnet. That is, as... Figure 8 In the illustrated embodiment, a first zoom damping conductor is disposed to the side of the A magnet 11, and a first image stabilization damping conductor is disposed below the A magnet 11. That is, the first zoom damping conductor and the first image stabilization damping conductor share the magnetic field provided by the A magnet 11.

[0166] Preferably, the B magnet 12 can serve as both a first zoom drive magnet and a second image stabilization damping magnet. That is, as follows... Figure 8 In the illustrated embodiment, a first zoom drive coil is disposed to the side of the B magnet 12, and a second image stabilization damping conductor is disposed below the B magnet 12. That is, the first zoom drive coil and the second image stabilization damping conductor share the magnetic field provided by the B magnet 12.

[0167] Preferably, the C magnet 13 can serve as both a second zoom damping magnet and a first image stabilization drive magnet. That is, as follows... Figure 8In the illustrated embodiment, a second zoom damping conductor is disposed to the side of the C magnet 13, and a first image stabilization drive coil is disposed below the C magnet 13. That is, the second zoom damping conductor and the first image stabilization drive coil share the magnetic field provided by the C magnet 13.

[0168] Preferably, the D magnet 14 can serve as both a second zoom drive magnet and a second image stabilization drive magnet. That is, as follows: Figure 8 In the illustrated embodiment, a second zoom drive coil is disposed to the side of the D magnet 14, and a second image stabilization drive coil is disposed below the D magnet 14. That is, the second zoom drive coil and the second image stabilization drive coil share the magnetic field provided by the D magnet 14.

[0169] Therefore, in some embodiments, the magnets can be shared reasonably and fully based on the interaction between the magnets and the conductors or coils. This can reduce the production and application costs of the motor components and prevent excessive magnets from causing mutual interference and affecting the zoom and anti-shake functions of the motor components.

[0170] It is worth noting that this embodiment only exemplifies the sharing of some magnets. Other magnet installation configurations that meet the requirements of zoom and damping magnetic fields are also applicable to this invention. For example, the zoom drive magnet can be used as the zoom damping magnet, that is, the same magnet can be used as both a zoom drive magnet and a zoom damping magnet. Through a reasonable layout, the zoom drive coil and the zoom damping conductor are subjected to electromagnetic forces in the magnetic field provided by the same magnet. This arrangement reduces the number of magnets used in the overall motor assembly, saving costs in actual production applications, reducing the number of motor assembly components, and improving the stability and reliability of the overall motor assembly.

[0171] It should be noted that the above-mentioned magnet sharing method is not limited to the zoom drive magnet being used as the zoom damping magnet. Similarly, the image stabilization drive magnet can also be used as the image stabilization damping magnet. That is, the same magnet can be used as both an image stabilization drive magnet and an image stabilization damping magnet. Through a reasonable layout, the image stabilization drive coil and the image stabilization damping conductor are subjected to electromagnetic forces in the magnetic field provided by the same magnet. This arrangement also reduces the number of magnets used in the overall motor assembly, saving on actual production costs, reducing the number of motor assembly components, and improving the overall stability and reliability of the motor assembly.

[0172] exist Figure 8In the illustrated embodiment, magnets A 11, B 12, C 13, and D 14 are constructed as cuboid magnets and uniformly arranged on the support 52, preferably uniformly arranged around the lens carrier 51. It should be noted that the arrangement of the magnets is not limited to this embodiment. For example, other numbers and shapes of magnets that can also provide a stable magnetic field can be used and uniformly arranged inside the motor housing 41. This arrangement can also achieve the effect of providing a stable magnetic field for the coil and conductor. Furthermore, in actual production applications, a more suitable magnet arrangement can be selected according to different application scenarios of the motor assembly to ensure that the coil and conductor can generate driving and damping forces in a stable magnetic field.

[0173] It is worth pointing out that, Figure 8 In the illustrated embodiment, magnets A11, B12, C13, and D14 are fixed in the bracket 52. The zoom drive coil 21 and zoom damping conductor 22, arranged opposite to the magnets, move under electromagnetic force in the magnetic fields provided by their respective magnets. In other words, in this motor assembly, for zooming motion, the bracket 52 and the magnets fixed to it constitute the fixed part, while the lens carrier, the zoom drive coil 21 fixed to the lens carrier 51, and the zoom damping conductor 22 constitute the movable part. The movable part undergoes electromagnetic interaction in the magnetic field provided by the magnets. When the zoom drive coil 21 is energized, it drives the lens carrier 51 and lens 43 to zoom under the action of electromagnetic force. Simultaneously, electromagnetic damping, conforming to Lenz's law, generates a damping force on the zoom damping conductor 22 that consistently opposes the zooming motion.

[0174] Unlike the above-mentioned solutions, the zoom drive coil 21, zoom damping conductor 22, and magnets can be arranged in different ways depending on structural design, assembly requirements, zoom performance, and damping requirements, in order to flexibly meet different needs. In some variant solutions, all magnets are arranged on the lens carrier 51, while the zoom drive coil 21 and zoom damping conductor 22 are correspondingly fixed on the bracket 52. Thus, the lens carrier 51 and the magnets fixed on the lens carrier 51 constitute the movable part, while the bracket 52, the zoom drive coil 21 fixed on the bracket 52, and the zoom damping conductor 22 constitute the fixed part.

[0175] In some variations, the zoom drive magnet is fixed to the lens carrier 51, while the zoom drive coil 21 is correspondingly fixed to the bracket 52; the zoom damping conductor 22 is also fixed to the lens carrier 51, while the zoom damping magnet is correspondingly fixed to the bracket 52. Thus, the lens carrier 51, the zoom drive magnet fixed to the lens carrier 51, and the zoom damping conductor 22 constitute the movable part, while the bracket 52, the zoom drive coil 21 fixed to the bracket 52, and the zoom damping magnet constitute the fixed part. The working principle is the same as described above: the movable part undergoes electromagnetic interaction in the magnetic field provided by the magnet, and is correspondingly subjected to an electromagnetic driving force capable of zooming and an electromagnetic damping force for vibration attenuation.

[0176] With this setup, the movement of the lens carrier 51 and the lens 43 on the lens carrier 51 driven by the magnet can achieve the same driving and damping effect as the motor assembly.

[0177] Figure 9 A vibration damping effect curve is shown, comparing the motor assembly according to the present invention with that of the prior art. For example... Figure 9 As shown, curve S1 is the vibration attenuation curve under the prior art, and curve S2 is the vibration attenuation curve of the present invention with an electromagnetic damping component. It can be seen that the vibration attenuation curve S2 with the electromagnetic damping component according to the present invention has a significantly smaller amplitude than curve S1, with curve S2 starting to approach zero as early as about 1 second, thus providing a significantly improved damping effect. Furthermore, since the damping component exists independently of the driving component and the damping component generates damping force through an electromagnetic field, it overcomes the shortcomings of damping materials such as damping adhesives, such as easy wear, limited service life, and unstable damping effect.

[0178] It is worth noting that in some embodiments, the zoom drive magnet or image stabilization drive magnet of the zoom drive assembly or image stabilization drive assembly can also be constructed as a structure of multiple magnets. For example, magnet B 12 or magnet D 14 can be configured as a combination of two or more magnets, which work together through appropriate polarity matching to provide a more flexible and matched magnetic field line orientation for drive or damping requirements. Such a magnet structure can enhance the driving force of the motor drive assembly, enabling the motor assembly to more stably control the heavier lens 43.

[0179] It is worth noting that in some embodiments, for example, the A magnet 11 includes at least one magnet, and correspondingly, the zoom damping conductor 22 or the image stabilization damping conductor 32 includes multiple metal sheets. In other embodiments, the A magnet 11 includes multiple magnets, and correspondingly, the zoom damping conductor 22 or the image stabilization damping conductor 32 includes at least one metal sheet. That is, the zoom damping or image stabilization damping in the damping assembly may include multiple damping units, each damping unit consisting of at least one magnet and at least one metal sheet corresponding to the magnet. By dividing the damping assembly into small damping units, the damping structure arrangement can be made more flexible. For example, the electromagnetic damping unit of each damping assembly can be configured as a multi-magnet structure as described above.

[0180] Furthermore, the motor assembly may further include a displacement sensor, such as a Hall effect sensor, which detects the displacement of the movable part relative to the base 42 in the zoom direction and / or the optical image stabilization direction. This enables closed-loop control to drive the lens carrier 51 and / or the entire voice coil motor, achieving autofocus. In the closed-loop control mode, a circuit board is required. The circuit board can be a flexible circuit board or a rigid-flex board, etc. Electronic components are mounted on the circuit board and may include passive components such as capacitors, resistors, or inductors. The circuit board and electronic components may be located on one side of the drive assembly. In other embodiments, the circuit board and electronic components are mounted on the motor base 42.

[0181] The present invention also provides a camera module for capturing images of a target object. The camera module includes a motor assembly as described above, a lens assembly fixed in a lens carrier 51 of the motor assembly, and a photosensitive chip. The lens assembly includes a lens 43, which may be a lens group assembled from multiple optical components such as lenses. The photosensitive chip is, for example, an optical sensor that converts received light signals into image signals. The camera module can be applied to terminal devices, such as mobile terminal devices like mobile phones and tablets.

[0182] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with, but not limited to, technical features disclosed in this application that have similar functions.

Claims

1. A motor assembly for driving a lens assembly, characterized in that, The motor assembly includes: Lens carrier (51) is used to fix the lens assembly; A bracket (52) surrounds the lens carrier (51); The zoom drive assembly includes at least one zoom drive magnet fixed on the bracket and at least one zoom drive coil (21) fixed on the lens carrier (51) and located in the magnetic field of the at least one zoom drive magnet. The zoom drive assembly is used to drive the lens carrier (51) to move along the zoom direction. Base (42); The housing (41) is fixed to the base (42) and forms a receiving cavity with the base (42), wherein the zoom drive assembly is housed in the receiving cavity; The image stabilization drive assembly includes at least one image stabilization drive magnet fixed to the bracket (52), and at least one image stabilization drive coil (31) fixed to the base (42) and located in the magnetic field of the at least one image stabilization drive magnet. The image stabilization drive assembly is used to drive the lens assembly to move in a stabilization plane perpendicular to the zoom direction. A damping assembly for providing damping force for the movement of the lens carrier (51); The damping component includes: At least one zoom damping magnet is fixed to the bracket (52); At least one zoom damping conductor (22) is fixed on the lens carrier (51) and is in the magnetic field of the at least one zoom damping magnet, so that when the at least one zoom damping magnet fixed on the bracket (52) and the at least one zoom damping conductor (22) fixed on the lens carrier (51) move relative to each other, a damping force that opposes the movement of the lens carrier (51) can be generated on the at least one zoom damping conductor (22) fixed on the lens carrier (51) by electromagnetic action.

2. The motor assembly according to claim 1, characterized in that, When the at least one zoom drive coil (21) is energized, a driving force can be generated on the at least one zoom drive coil (21) fixed on the lens carrier (51) through electromagnetic action.

3. The motor assembly according to claim 2, characterized in that, The zoom drive component further includes: Upper spring (61). Lower spring (62) The lens carrier (51) and the bracket (52) surrounding the lens carrier (51) are held between the upper spring (61) and the lower spring (62).

4. The motor assembly according to claim 3, characterized in that, The upper spring (61) and lower spring (62) respectively include: Inner frame, Outer frame, and A flexible spring wire (63) elastically connects the inner frame and the outer frame, allowing relative movement between the inner frame and the outer frame. The upper surface of the lens carrier (51) is connected to the inner frame of the upper spring (61), and the lower surface of the lens carrier (51) is connected to the inner frame of the lower spring (62). The upper surface of the bracket (52) surrounding the lens carrier (51) is connected to the outer frame of the upper spring (61), and the lower surface of the bracket (52) surrounding the lens carrier (51) is connected to the outer frame of the lower spring (62).

5. The motor assembly according to claim 4, characterized in that, The upper spring (61) is made of conductive material, wherein the spring wire (63) of the upper spring (61) is electrically connected to the outer frame and the inner frame of the upper spring (61), and the inner frame of the upper spring (61) is electrically connected to the zoom drive coil (21) fixed on the lens carrier.

6. The motor assembly according to claim 1, characterized in that, The at least one zoom damping magnet is fixed on the support (52) between the lens carrier (51) and the bracket (52) surrounding the lens carrier (51), and the at least one zoom damping conductor (22) is fixed on the lens carrier (51) between the lens carrier (51) and the bracket (52) surrounding the lens carrier (51), and the positions of the at least one zoom damping magnet and the at least one zoom damping conductor (22) are opposite to each other.

7. The motor assembly according to claim 1, characterized in that, The zoom damping conductor (22) is a hollow or solid conductor sheet.

8. The motor assembly according to claim 4, characterized in that, The image stabilization drive component includes: At least one suspension line (64) is electrically connected at one end to the base (42) and at the other end to the outer frame of the upper spring (61) of the zoom drive assembly.

9. The motor assembly according to claim 8, characterized in that, The suspension line (64) is made of metal wire and is capable of providing restoring force in the image stabilization plane perpendicular to the zoom direction.

10. The motor assembly according to claim 8, characterized in that, The base (42) has conductive pins (44) that are electrically connected to an external circuit, wherein the suspension wire (64) electrically connects the outer frame of the upper spring (61) to the conductive pins (44) of the base (42).

11. The motor assembly according to claim 8, characterized in that, When the at least one anti-shake drive coil (31) is energized, it can generate a driving force on the at least one anti-shake drive magnet fixed on the bracket (52) through electromagnetic action.

12. The motor assembly according to claim 11, characterized in that, The zoom drive magnet is used as the zoom damping magnet.

13. The motor assembly according to claim 11, characterized in that, The zoom drive magnet or the zoom damping magnet is used as the image stabilization drive magnet.

14. The motor assembly according to claim 11, characterized in that, At least one image stabilization drive coil (31) is arranged in two perpendicular directions in the image stabilization plane perpendicular to the zoom direction.

15. The motor assembly according to claim 11, characterized in that, The damping component further includes: At least one anti-shake damping magnet is fixed on the bracket (52); At least one anti-shake damping conductor (32) is fixed on the base (42) and is in the magnetic field of the at least one anti-shake damping magnet, so that when the at least one anti-shake damping magnet fixed on the bracket (52) and the at least one anti-shake damping conductor (32) fixed on the base (42) move relative to each other, a damping force that opposes the movement can be generated on the at least one anti-shake damping magnet fixed on the bracket (52) through electromagnetic action.

16. The motor assembly according to claim 15, characterized in that, The anti-shake driving magnet is used as the anti-shake damping magnet.

17. The motor assembly according to claim 15, characterized in that, The zoom drive magnet or the zoom damping magnet is used as the image stabilization damping magnet.

18. The motor assembly according to claim 15, characterized in that, At least one image stabilizing damping conductor (32) is arranged in two perpendicular directions in the image stabilization plane perpendicular to the zoom direction.

19. The motor assembly according to claim 15, characterized in that, The image stabilization damping conductor (32) and the image stabilization drive coil (31) are evenly distributed around the lens carrier (51) on the base (42) of the motor.

20. The motor assembly according to claim 1, characterized in that, The outer shell (41) is made of a magnetically conductive material.

21. The motor assembly according to claim 19, characterized in that, The housing (41) has a plurality of protrusions extending along a direction parallel to the zoom direction.

22. The motor assembly according to claim 3, characterized in that, The motor assembly further includes a displacement sensor for detecting the displacement of the lens carrier (51).

23. A camera module, characterized in that, The camera module includes: Motor assembly according to any one of claims 1 to 22; The lens assembly is fixed in the lens carrier (51) of the motor assembly, and Photosensitive chip.

Images