Camera module and driving mechanism applied to camera module

Abstract

The invention discloses a camera module and a driving mechanism thereof, and belongs to the technical field of electronics, the driving mechanism comprises a fixed frame, a movable carrier, a guide assembly, a driving assembly and a magnetic attraction assembly, the fixed frame comprises a supporting surface, the movable carrier is movably arranged on the fixed frame and comprises a contact surface, and the driving assembly is connected with the fixed frame. The magnetic attraction assembly comprises a first magnetic attraction piece and a second magnetic attraction piece which are arranged on the fixed frame and the movable carrier respectively, the two magnetic attraction pieces interact to apply magnetic attraction force to the movable carrier, the direction of the magnetic attraction force is opposite to the pre-pressure, and the direction of the magnetic attraction force is larger than that of the pre-pressure. Therefore, the contact surface is adsorbed to the supporting surface, and the guide assembly is clamped between the supporting surface and the contact surface. The movable carrier can be prevented from inclining relative to the fixed frame, the movable carrier is prevented from being clamped relative to the fixed frame, the movable carrier is adjusted smoothly, and the imaging quality is improved.

Description

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] At present, electronic devices are usually equipped with camera modules. With the improvement of living standards, people pay more and more attention to the performance of camera anti-shake in order to obtain photos with higher image quality. As users' demand for camera increases, the functional diversity and performance requirements of camera modules used in terminal devices such as mobile phones and tablets also increase. In order to realize multiple functions of the camera module, such as focus and anti-shake, a motor is usually set in the camera module to drive the entire optical lens or part of the optical lens to move to realize at least one of the above functions.

[0003] However, as the performance requirements increase, the size of the optical lens or photosensitive device also increases, and therefore, the performance requirements for the motor also increase. The piezoelectric motor is a motor with fast response, large driving force, and high driving accuracy. 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. Summary of the invention

[0004] One object of the present application is to provide a driving mechanism applied to 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.

[0005] Another object of the present application is to provide a camera module, which is beneficial to improving imaging quality because the movable carrier equipped with an optical lens can be smoothly adjusted.

[0006] In order to achieve one of the purposes of this application, the technical solution adopted in this application is: a driving mechanism applied to a camera module, which includes:

[0007] A fixed frame, the fixed frame comprising a support surface;

[0008] 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;

[0009] 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;

[0010] 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;

[0011] 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.

[0012] 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 supporting 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.

[0013] Preferably, 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.

[0014] Preferably, the guide assembly comprises 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.

[0015] As a preference, the first magnetic attraction member is disposed on a side portion of the first frame, and the second magnetic attraction member is disposed on a side portion of the first carrier.

[0016] Preferably, the magnetic attraction component comprises a first group of magnetic attraction components and a second group of magnetic attraction components which are 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.

[0017] 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.

[0018] Preferably, 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.

[0019] 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.

[0020] Preferably, the magnetic attraction components are provided 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.

[0021] Preferably, 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 is applied to the movable carrier, the pre-stressing assembly forms the first magnetic attraction member, and the middle part of the second magnetic attraction member is arranged opposite to the friction head.

[0022] Preferably, 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.

[0023] 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.

[0024] As a preferred embodiment, 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 inwardly 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 outwardly to form outer convex portions, the outer convex portions are located between the inner convex portions 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.

[0025] Preferably, the first magnetic attraction member and / or the second magnetic attraction member is a magnet, and the driving mechanism further comprises 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.

[0026] In order to achieve another purpose of the present application, the technical solution adopted in the present application is: a camera module, which includes:

[0027] Optical lens;

[0028] A photosensitive component arranged relative to the optical lens; and

[0029] In the above-mentioned driving mechanism, the optical lens is arranged on the movable carrier.

[0030] Compared with the prior art, the beneficial effects of this application are:

[0031] (1) The magnetic attraction of the magnetic attraction assembly makes the contact surface of the movable carrier tend 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, realizing the tight assembly between the fixed frame, the movable carrier and the guide assembly;

[0032] (2) The magnetic attraction force is in the opposite direction to the pre-pressure and is greater than the pre-pressure. The magnetic attraction force can support the movable carrier in parallel to the fixed frame through the guide assembly. Even when the pre-pressure is tilted, the magnetic attraction force can completely offset the component of the pre-pressure that is not perpendicular to the contact surface between the friction head and the movable carrier, and keep the opposite surfaces of the movable carrier and the fixed frame parallel to each other.

[0033] (3) When the movable carrier tilts under the pre-pressure 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;

[0034] (4) The magnetic component has a simple structure and low cost;

[0035] (5) The setting of the guide assembly allows 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 helping to reduce the friction force on the movable carrier when it moves relative to the fixed frame, making it easier for the movable carrier to be driven. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a driving mechanism in the prior art;

[0037] Figure 2 It is a schematic diagram of the pre-pressure inclination;

[0038] Figure 3 This is a schematic diagram of the three-dimensional structure of a driving mechanism in a preferred embodiment of the present application;

[0039] Figure 4 This is a schematic diagram of the exploded structure of the driving mechanism in a preferred embodiment of the present application;

[0040] Figure 5 A top view of a driving mechanism in a preferred embodiment of the present application;

[0041] Figure 6 for Figure 5 Sectional view in the AA direction;

[0042] Figure 7 for Figure 5 Cross-sectional view in the BB direction;

[0043] Figure 8 This is a schematic diagram of the exploded structure of a driving assembly in a preferred embodiment of the present application;

[0044] Fig. 9 A top view of a fixed frame in a preferred embodiment of the present application;

[0045] Fig.10 A top view of a movable carrier in a preferred embodiment of the present application;

[0046] Fig.11 A cross-sectional view of a driving mechanism along a direction perpendicular to the central axis in a preferred embodiment of the present application;

[0047] Fig.12 for Figure 5 Cross-sectional view in CC direction;

[0048] Fig.13 This is a schematic diagram of a partial structure of a movable carrier in a preferred embodiment of the present application;

[0049] Fig.14 This is a schematic diagram of a partial structure of a fixed frame in a preferred embodiment of the present application;

[0050] Fig.15 This is a structural schematic diagram of a pre-pressing assembly in another preferred embodiment of the present application;

[0051] Fig.16 for Fig.15 A schematic cross-sectional structure diagram of the pre-pressing assembly shown;

[0052] Fig.17 This is a schematic diagram of the structure of a driving mechanism in another embodiment of the present application;

[0053] Fig.18 This is a schematic diagram of the structure of a driving mechanism in another embodiment of the present application;

[0054] Fig.19 This is a schematic diagram of the structure of a driving mechanism in yet another embodiment of the present application;

[0055] In the figure: O, center axis; P, preload; F, driving force; 10, fixed frame; 11, supporting surface; 111, first guide groove; 112, third guide groove; 113, first gap; 12, first frame side; 13, second frame side; 14, third frame side; 15, fourth frame side; 16, inner convex portion; 161, first inner convex portion; 162, second inner convex portion; 17, outer concave portion; 171, first outer concave portion; 172, second outer concave portion; 18, second groove; 181, second groove one; 182, second groove two; 191, second gap; 192, opening; 20, movable carrier; 21, contact surface; 211, second guide groove; 212, fourth guide groove; 22, first carrier side; 23, second carrier side; 24, third carrier side; 25, fourth carrier side; 26, outer convex portion; 261, first outer convex portion; 262, second outer convex portion; 263, first mounting groove; 27, inner concave portion; 271, first inner concave portion; 272, second inner concave portion; 28, first groove; 281, first groove 1; 282, first groove 2; 29, friction plate; 30, drive assembly; 31, pre-pressing assembly; 311, main body; 312, fixing portion; 313, structural member; 3131, third side; 314, buffer member; 31 41. First side surface; 3142. Second side surface; 32. Actuating assembly; 321. Piezoelectric circuit board; 322. Piezoelectric vibrator; 323. Friction head; 40. Guide assembly; 41. First guide member; 42. Second guide member; 43. Ball; 44. Guide rod; 50. Magnetic assembly; 51. Second magnetic member; 52. First magnetic member; 53. Magnetic induction member; 54. First group of magnetic assemblies; 55. Second group of magnetic assemblies. DETAILED DESCRIPTION

[0056] 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.

[0057] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present 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 the present application.

[0058] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0059] The terms "including" 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 comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0060] The present application provides a driving mechanism applied to a camera module, which includes a fixed frame 10, a movable carrier 20, a driving component 30 and a guiding component 40. The movable carrier 20 is movably connected to the fixed frame 10, and the driving component 30 is connected to the fixed frame 10, and at the same time abuts against the movable carrier 20 and provides a pre-pressure P. When the driving component 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 component 40 is arranged between the fixed frame 10 and the movable carrier 20, so that there is a fixed gap between the opposite 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.

[0061] like Figure 3 As shown, 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 suitable for moving along the central axis O direction.

[0062] 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 direction relative to the fixed frame 10, thereby driving the optical lens to move along the optical axis direction to realize the optical focusing function.

[0063] 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.

[0064] In some embodiments, Figure 7 , Figure 8As shown, 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 accuracy, 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.

[0065] 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 pre-pressing assembly 31. The friction head 323 is fixed to the side of the piezoelectric vibrator 322 facing the movable carrier 20. The friction head 323 abuts against the side wall of the movable carrier 20 under the action of the pre-pressing force P, that is, the friction head 323 and the pre-pressing assembly 31 are respectively arranged on opposite sides of the piezoelectric vibrator 322. The friction head 323 is moved by the high-frequency micro-amplitude vibration of the piezoelectric vibrator 322, and the friction between the friction head 323 and the outer wall of the movable carrier 20 is used to drive the movable carrier 20 to move in a straight line 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 to the movable carrier 20.

[0066] 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 arranged on a 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.

[0067] In some embodiments, the pre-pressing component 31 is disposed on a side of the piezoelectric vibrator 322 facing away from the movable carrier 20 , so as to provide a pre-pressing force P toward the movable carrier 20 to the friction head 323 disposed on a side of the piezoelectric vibrator 322 facing the movable carrier 20 .

[0068] The guide assembly 40 is disposed between the movable carrier 20 and the fixed frame 10. One side of the guide assembly 40 abuts against the fixed frame 10, and the other side abuts against the movable carrier 20, and applies a support force N perpendicular to the central axis O to the movable carrier 20. If the movable carrier 20 is in surface contact with the fixed frame 10, the movable carrier 20 will be subject to greater friction resistance when moving, affecting the driving effect. The guide assembly 40 can change the contact mode between the movable carrier 20 and the fixed frame 10, such as point contact or line contact, reducing the area of ​​friction contact between the movable carrier 20 and the fixed frame 10, which is conducive to reducing the friction force on the movable carrier 20 when it moves relative to the fixed frame 10.

[0069] It should be understood that in one embodiment of the present application, Figure 4 , Figure 6 As shown, the guide assembly 40 can be implemented as a ball 43, and the guide assemblies 40 on both sides respectively include at least one ball 43, and multiple balls 43 are clamped between the movable carrier 20 and the fixed frame 10, and the ball 43 is in point contact with the movable carrier 20 and the fixed frame 10. In another embodiment of the present application, considering that 1) the ball 43 is in point contact with the movable carrier 20 and the fixed frame 10, when the movable carrier 20 is tilted, a large inclination angle may be generated between the movable carrier 20 and the ball 43, causing the ball 43 to get stuck and sliding friction to occur; 2) the ball 43 will 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 ball 43 fall off, or the debris generated by friction, impact or other reasons between the ball 43 and the movable carrier 20 and the fixed frame 10 may cause the ball 43 to get stuck, and then cause 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, Figure 6 As indicated by the dotted line, the guide rod 44 is clamped between the movable carrier 20 and the fixed frame 10 , and there is a line contact between the guide rod 44 and the movable carrier 20 and the fixed frame 10 , which reduces the risk of jamming compared to the ball bearing 43 .

[0070] It is understandable that if Figure 2As shown, 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 having a certain inclination relative to the plane where the side wall of the movable carrier 20 is located under certain circumstances. 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. 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.

[0071] In particular, in some embodiments, Figure 1 As shown, the guide assembly 40 is arranged at two diagonal positions of the movable carrier 20. At this time, the support force N applied by the fixed frame 10 to the movable carrier 20 through the guide assembly 40 is opposite to the preload force P. The two forces cooperate to clamp the movable carrier 20 between the guide assembly 40 and the fixed frame 10, and the movable carrier 20 is able 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 cooperates with the guide assembly 40 to guide the movable carrier 20 to move along the central axis O. From a top view, the guide assembly 40 and the actuating assembly 32 arranged at two diagonal positions of the movable carrier 20 are arranged at three points on the side wall of the movable carrier 20. The distance from the center position of the frictional contact between the actuating assembly 32 and the movable carrier 20 to the connecting line of the guide assembly 40 arranged 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 makes the lever arm x and the overturning moment M larger. When the movable carrier 20 is driven by the actuating assembly 32 to move along the central axis O, the movable carrier 20 will have 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 assembly 40 is arranged at the diagonal position, the two diagonal guide assemblies 40 may generate uncertain friction, causing the moving stroke and moving speed of the movable carrier 20 to fail to meet the standards. Moreover, the diagonal guide assembly 40 may squeeze the driving assembly 30, causing the friction force of the movable carrier 20 to increase when the movable carrier 20 moves.

[0072] Furthermore, when the guide assembly 40 is implemented as a ball 43, it is possible that the movable carrier 20 and the ball 43 are stuck, or the movable carrier 20 and the ball 43 fall off, so that the movable carrier 20 cannot continue to move, affecting the focusing effect. Of course, when the guide assembly 40 is implemented as a guide rod 44, the situation will be better than the ball 43, but the tilt of the movable carrier 20 will also affect the optical focusing effect.

[0073] To solve the above problems, the present application arranges the guide assembly 40 and the drive assembly 30 on the same side of the movable carrier 20. Compared with 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 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 connecting line between 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 direction of the central axis O, the inclination angle of the movable carrier 20 is small, so that the risk of the movable carrier 20 tilting is reduced, thereby avoiding affecting the optical focusing effect.

[0074] However, it is inevitable that, in the case of tilting due to the presence of the assembly gap, the movable carrier 20 is still likely to tilt due to the presence of the assembly gap. Here, the assembly gap refers to the gap reserved for the movable carrier 20 and the guide assembly 40 to be assembled in the fixed frame 10, that is, the gap between the fixed frame 10 and the movable carrier 20. Through the assembly gap, the movable carrier 20 and the guide assembly 40 can be assembled in the fixed frame 10, but also leave space for the movable carrier 20 to tilt. And in some cases, due to the manufacturing tolerances of the fixed frame 10, the movable carrier 20, and the guide assembly 40, and the influence of other factors in 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 of 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, causing the movable carrier 20 to be unable to move to achieve the optical focusing function.

[0075] To this end, the present application further improves the structure of the driving mechanism and proposes a driving mechanism applied to the camera module: Figures 3 to 19As shown, it includes a fixed frame 10, a movable carrier 20, a driving assembly 30, a guide assembly 40 and at least one group of magnetic suction assemblies 50, the fixed frame 10 includes a support surface 11, the movable carrier 20 is movably arranged on the fixed frame 10, the movable carrier 20 includes a contact surface 21, the support surface 11 and the contact surface 21 are arranged opposite to each other, the guide assembly 40 is located between the support surface 11 and the contact surface 21, so that a first gap 113 is maintained between the support surface 11 and the contact surface 21, the driving assembly 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 support surface 11, and the magnetic suction assembly 50 includes a first magnetic suction member 52 and a second magnetic suction member 55. 1. The first magnetic member 52 is arranged on the fixed frame 10, and the second magnetic member 51 is arranged on the movable carrier 20. The first magnetic member 52 and the second magnetic member 51 interact with each other to apply 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 pre-pressure P, and the magnetic force is greater than the pre-pressure 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 can be clamped between the support surface 11 and the contact surface 21, that is, the first magnetic member 52 and the second magnetic member 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.

[0076] 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 exerts 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 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.

[0077] The magnetic attraction force of the magnetic attraction component 50 makes the contact surface 21 of the movable carrier 20 tend 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 prepressure P and is greater than the prepressure P, the magnetic attraction force can support the movable carrier 20 in parallel to the fixed frame 10 through the guide assembly 40. Even when the prepressure P is tilted, the magnetic attraction force can offset the influence of the tilted prepressure 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 prepressure 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, the risk of the movable carrier 20 tilting when moving is reduced, and the risk of the guide assembly 40 getting stuck is reduced, especially the problem of difficulty in rolling and getting stuck when the guide assembly 40 is a ball 43 is solved, 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 use cost.

[0078] 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 attraction 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 driving mechanism and ensuring the stable operation of the driving mechanism.

[0079] 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 drive component 30 on the same side of the movable carrier 20 .

[0080] In this embodiment, the guide assembly 40 and the driving assembly 30 are arranged on the same side of the movable carrier 20. Specifically, 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 driving assembly 30 are both arranged between the first frame side portion 12 and the first carrier side portion 22. Figure 5 It can be seen that the guide assembly 40 and the driving 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 diagonals 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.

[0081] It can be understood that, in the present embodiment, the pre-pressure P makes the first carrier side portion 22 have a tendency to move 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 attraction force acts on the movable carrier 20, the movable carrier 20 is able to overcome the pre-pressure P, so that the first carrier side portion 22 has a tendency to move toward 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.

[0082] In this embodiment, the driving assembly 30 includes a pre-pressing assembly 31 and an actuating assembly 32. The pre-pressing assembly 31 is connected to the fixed frame 10, and the actuating assembly 32 is connected to the pre-pressing assembly 31. The pre-pressing assembly 31 provides a pre-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 portion 22, and the pre-pressure P acts on the outer surface of the first carrier side portion 22. In a specific example, the piezoelectric circuit board 321 is arranged between the piezoelectric vibrator 322 and the pre-pressing assembly 31, and the pre-pressing assembly 31 is fixed to the fixed frame 10. The piezoelectric vibrator 322 is abutted against one side of the movable carrier 20 by the pre-pressure provided by the pre-pressing assembly 31.

[0083] 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.

[0084] In some embodiments, Figure 9-11As shown, the movable carrier 20 and the fixed frame 10 are basically square, and the overall shapes of the movable carrier 20 and the fixed frame 10 are 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 connected in sequence, 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 corresponding to each other. The driving assembly 30 is arranged between the first carrier side portion 22 and the first frame side portion 12, and is centrally arranged. The first guide member 41 and the second guide member 42 are also arranged between the first carrier side portion 22 and the first frame side portion 12. The first guide member 41 is arranged on a side of the driving assembly 30 relatively close to the fourth carrier side portion 25, and the second guide member 42 is arranged on a side of the driving assembly 30 relatively close to the second carrier side portion 23, and the first guide member 41 and the second guide member 42 are symmetrically arranged on both sides of the driving assembly 30 respectively to maintain the 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.

[0085] In some embodiments, Fig.11 As shown, the driving assembly 30, the guiding assembly 40 and the magnetic attraction assembly 50 are all arranged on the same side of the movable carrier 20, and the several structures applying force to the movable carrier 20 are arranged relatively concentratedly, which is conducive to maintaining a compact structure.

[0086] Furthermore, in this embodiment, the first magnetic component 52 is disposed on the first frame side 12, and the second magnetic component 51 is disposed 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.

[0087] In some embodiments, the magnetic attraction component 50 includes a first group of magnetic attraction components 54 and a second group of magnetic attraction components 55 arranged relative to the driving component 30. The first group of magnetic attraction components 54 and the second group of magnetic attraction 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.

[0088] 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.

[0089] In a specific embodiment, if Fig.11As shown, the first group of magnetic components 54 is arranged on the side of the first guide member 41 away from the driving assembly 30, and the second group of magnetic components 55 is arranged on the side of the second guide member 42 away from the driving assembly 30. Further, in a specific example, the first guide member 41 is located between the first group of magnetic components 54 and the driving assembly 30, and the second guide member 42 is located between the second group of magnetic components 55 and the driving 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 driving 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 driving assembly 30, so that the distribution of force in the driving mechanism can be more balanced and the driving mechanism can be more stable.

[0090] In another specific embodiment, Fig.17 As shown, the first group of magnetic components 54 is disposed between the first guide member 41 and the driving component 30 , and the second group of magnetic components is disposed between the second guide member 42 and the driving component 30 .

[0091] In another specific embodiment, Fig.18 As shown, along the direction parallel to the pre-pressure P, the first magnetic component 52 and the second magnetic component 51 in the first magnetic component 54 are respectively arranged on both sides of the first guide member 41, and the first magnetic component 52 and the second magnetic component 51 in the second magnetic component 55 are respectively arranged on both sides of the second guide member 42, the first magnetic component 52 and the second magnetic component 51 in the first magnetic component 54 attract each other, and the first magnetic component 52 and the second magnetic component 51 in the second magnetic component 55 attract each other. That is, the first magnetic component 54 and the first guide member 41 are arranged in a colinear manner, and the second magnetic component 55 and the second guide member 42 are arranged in a colinear manner, which is conducive to directly applying the magnetic attraction force to the guide member 40, thereby clamping the guide member 40.

[0092] In some other embodiments, the magnetic attraction component 50 is disposed 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, Fig.19 As shown, the magnetic attraction component 50 is set as a group, and along the direction of the pre-pressure P, the first magnetic attraction component 52 and the second magnetic attraction component 51 in the group of magnetic attraction components 50 are respectively arranged on both sides of the driving component 30. In other words, the magnetic attraction force is collinear with the pre-pressure P and is opposite in direction. 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.

[0093] 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-stress 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-stress P to the movable carrier 20.

[0094] Furthermore, when the magnetic attraction component 50 is set to two groups, the first group of magnetic attraction components 54 and the second group of magnetic attraction components 55 are symmetrically arranged about the central axis O of the driving component 30, and the magnetic attraction force generated by the first group of magnetic attraction components 54 is equal to the magnetic attraction force generated by the second group of magnetic attraction components 55, so as to provide equal magnetic attraction 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 attraction forces on both sides, thereby avoiding affecting the optical focus and / or optical image stabilization effect.

[0095] When the magnetic attraction component 50 is set as only one group, as an improvement, the pre-stressing component 31 forms a first magnetic attraction component 52. In other words, the first magnetic attraction component 52 can also be used as a part of the pre-stressing component 31. In this way, the number of components can be reduced and it is also suitable to reduce the size of the entire driving mechanism.

[0096] It can be understood that, in some embodiments, the first magnetic attraction member 52 is a magnet having magnetic attraction force, and the second magnetic attraction member 51 is an object suitable for being attracted by the magnet.

[0097] 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.

[0098] 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.

[0099] The first magnetic member 52 on the pre-pressing component 31 can be set as an object suitable for being attracted by a magnet, and the second magnetic member 51 on the movable carrier 20 is set as a magnet, which directly attracts the pre-pressing component 31 to generate magnetic attraction. The specific structure of the pre-pressing component 31 and the first magnetic member 52 will be further explained below.

[0100] The middle portion of the second magnetic attraction member 51 is arranged opposite to the friction head 323 to prevent the magnetic attraction force from being eccentric with respect to the pre-pressure P and causing the movable carrier 20 to rotate and tilt around the optical axis.

[0101] 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.

[0102] Further, such as Fig.12 As shown, 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 between the first magnetic member 52 and the second magnetic member 51 can still be perpendicular to the contact surface 21.

[0103] Furthermore, the travel range of the movable carrier 20 driven by 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 .

[0104] 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.

[0105] Further, in some embodiments, the first magnetic member 52 and / or the second magnetic member 51 is a magnet, and the driving mechanism further includes a magnetic sensing member 53, which is arranged relative to at least one magnet, so as to judge the position of the movable carrier 20 by inducing a change in the magnetic field. For example, when the second magnetic member 51 on the movable carrier 20 is a magnet, the magnetic sensing member 53 can be arranged on the fixed frame 10 relative to the second magnetic member 51, so as to be able to detect changes in the magnetic field.

[0106] In this embodiment, Fig.11 As shown, along the direction parallel to the pre-pressure P, the magnetic induction component 53 and the second magnetic attraction component 51 are arranged opposite to each other. 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 is convenient for controlling the driving component 30 to adjust the position of the movable carrier 20.

[0107] Specifically, the magnetic induction element 53 is a Hall induction sensor, or a magnetoelectric induction sensor, or a magnetoresistive effect sensor, such as a magnetic sensitive element TMR using a tunnel magnetoresistive effect, or a chip integrated with a magnetic induction function, or other elements capable of sensing changes in a magnetic field.

[0108] In some embodiments, one magnetic induction component 53 is provided, which is arranged relative to a magnet in the magnetic attraction component 50. In some other embodiments, two magnetic induction components 53 are provided, 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.

[0109] The magnetic induction component 53 can be specifically fixed on the first carrier side 22 or the first frame, or can be arranged 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 arranged relative to the magnet in the magnetic attraction component 50 to sense the change of the magnetic field.

[0110] More specifically, the first magnetic attraction component 52 , the second magnetic attraction component 51 , and the magnetic induction component 53 can be fixed to the corresponding movable carrier 20 or the fixed frame 10 by injection molding, plug-in, snap-on, bonding, welding, or the like.

[0111] In a specific embodiment, the first magnetic member 52 is attached and fixed to the outer surface of the first frame side portion 12, the second magnetic member 51 is arranged on the outer surface of the first carrier side portion 22, the first carrier side portion 22 of the movable carrier 20 is provided with a first mounting groove 263, the second magnetic member 51 is installed in the first mounting groove 263, the second magnetic member 51 does not occupy additional space, which is conducive to maintaining a compact structure, and is shielded and protected by the first mounting groove 263. Among them, the first mounting groove 263 can be a through groove that passes through both ends of the first carrier side portion 22 along the optical axis direction, or a groove that is closed at both ends along the optical axis direction.

[0112] The connection method of the second magnetic member 51, and when connected by the 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, and the same applies to the first magnetic member 52. It can be understood that when the second magnetic member 51 is fixedly connected by opening a mounting groove on the outer surface of the first carrier side wall, it is necessary to avoid the guide component 40 to avoid affecting the contact between the contact surface 21 on the first carrier side wall and the guide component 40. When the second magnetic member 51 is embedded in the first carrier side portion 22 by injection molding, or 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 direction, then, the second magnetic member 51 does not need to avoid the guide component 40, and the setting position of the first magnetic member 52 relative to the guide component 40 is the same.

[0113] The first magnetic attraction member 52 and the second magnetic attraction member 51 are respectively configured in a regular block or sheet shape, with a simple structure and easy processing and forming, and it is convenient to open a mounting groove of a corresponding shape.

[0114] Similarly, in some embodiments, a second mounting groove is provided on the movable carrier 20 or the fixed frame 10, and the magnetic induction element 53 is disposed in the second mounting groove. Firstly, the magnetic induction element can be shielded and protected, and secondly, the magnetic induction element 53 does not need to occupy additional space, which is conducive to keeping the structure of the entire driving mechanism compact.

[0115] As an improvement, in some embodiments, Figure 9-11 As shown, the fixed frame 10 is provided with an inner convex portion 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 convex portion 26, which is formed by protruding outward from the outer side wall of the movable carrier 20, and the outer convex portion 26 is arranged opposite to the inner convex portion 16, and a second gap 191 is formed between the two, and 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, so that when the driving component 30 is affected by an external force and the movable carrier 20 tilts relative to the frame, due to the small second gap 191, the inner convex portion 16 and the outer convex portion 26 collide with each other to prevent the tilt degree of the movable carrier 20 from further increasing and causing the entire driving mechanism to fail. It should be pointed out that the protrusion to the inside here can be understood as protruding in the direction close to the driving component 30 or the central axis O, and can also be understood as protruding in the direction close to the optical axis, and the protrusion to the outside is just the opposite.

[0116] 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 and the first inner convex portion 161 are arranged opposite to each other and are arranged on one side of the driving component 30, and the second outer convex portion 262 and the second inner convex portion 162 are arranged opposite to each other and are arranged on the other side of the driving component 30, and the two sets of 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.

[0117] 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 surface of the second frame side portion 13 and the inner surface of the fourth frame side portion 15 respectively protrude inward to form an inner convex portion 16, 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 surface of the second carrier side portion 23 and the outer surface 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 a side of the outer convex portion 26 facing away from the contact surface 21 and a side of the inner convex portion 16 facing the support surface 11, and a width of the second gap 191 is smaller than a width of other gaps between the movable carrier 20 and the fixed frame 10, for example, smaller than a width of the first gap 113 between the contact surface 21 and the support surface 11, or a gap between the third carrier side portion 24 and the third frame side portion 14. Thus, when the driving assembly 30 is affected by an external force and the movable carrier 20 tilts relative to the frame, due to the small second gap 191, 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 collide with each other before the other opposite surfaces between the movable carrier 20 and the fixed frame 10, that is, the inner convex portion 16 and the outer convex portion 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 external force influence here includes but is not limited to the situation where the preload assembly 31 is set as a spring sheet and bends to cause the preload P to tilt.

[0118] Further, the fixed frame 10 is provided with an outer recess 17, which is formed by being recessed outward 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, respectively, and the outer recess 17 is connected with the inner convex portion 16 and cooperates to form a second groove 18, and the outer convex portion 26 is suitable for inserting into the second groove 18. Correspondingly, the movable carrier 20 is provided with an inner recess 27, which is formed by being recessed inward 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, respectively, and the outer convex portion 26 is connected with the inner recess 27 and cooperates to form a first groove 28, and the inner convex portion 16 is suitable for inserting into the first groove 28. The arrangement of the inner recess 27 and the outer recess 17 is conducive to reducing the size of the driving mechanism extending in the direction perpendicular to the optical axis and the vertical preload P, and keeping the structure compact. Among them, recessing inward can be understood as recessing in the direction close to the driving assembly 30 or the central axis O, and can also be understood as recessing in the direction close to the optical axis, and recessing outward is just the opposite.

[0119] 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 suitable for inserting into the second groove 181, and the second outer protrusion 262 is suitable for inserting 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 suitable for inserting into the first groove 281, and the second inner protrusion 162 is suitable for inserting into the first groove 282.

[0120] In some embodiments, in combination Fig.13 , Fig.14 As shown, the support surface 11 and the contact surface 21 are respectively provided with guide grooves extending in a direction parallel to the central axis O, and the guide assembly 40 is extended in a direction parallel to the central axis O and is clamped and limited by the guide grooves on both sides. It can be understood that the guide assembly 40 is continuously clamped in the guide grooves on both sides. When the movable carrier 20 moves in the direction of the central axis O, the guide assembly 40 is driven by the movable carrier 20 and moves in a direction parallel to the central axis O under the guidance of the guide grooves. In this movement process, 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, prevent the movable carrier 20 from tilting relative to the central axis O, and guide the movable carrier 20 to move along the central axis O.

[0121] In some embodiments, the support surface 11 is provided with a first guide groove 111 and a third guide groove 112 at intervals, and the contact surface 21 is provided with a corresponding second guide groove 211 and a fourth guide groove 212. 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, and 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 keep the support surface 11 and the contact surface 21 parallel.

[0122] In some embodiments, the first guide groove 111 and the second guide groove 211 are a group of V-shaped grooves with grooves facing each other, and the third guide groove 112 and the fourth guide groove 212 are a group of V-shaped grooves with grooves facing each other. The first guide member 41 and the second guide member 42 support the movable carrier 20 from both sides of the driving assembly 30 respectively, and cooperate with the two groups 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.

[0123] However, if the first guide groove 111 to the fourth guide groove 212 are all set as V-shaped grooves, there will be a certain offset between the actual position of the guide groove and the preset point position due to certain manufacturing tolerances of the movable carrier 20 and / or the fixed frame 10. When assembling, after aligning the V-shaped openings 192 of one set of guide grooves, there may be misalignment between the other pair of guide grooves, making it difficult to align, resulting in difficulty in installing one of the first guide member 41 and the second guide member 42 between the two misaligned guide grooves. In other words, setting all guide grooves as V-shaped grooves requires higher processing accuracy and higher processing costs.

[0124] 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 .

[0125] Specifically, in this embodiment, the first guide groove 111 and the second guide groove 211 are V-shaped grooves with grooves facing each other, the third guide groove 112 and the fourth guide groove 212 are arranged with grooves facing each other, and at least one of them is a plane groove, and the plane groove has a groove bottom parallel to the support surface 11, so as to allow the second guide member 42 therein to move along the groove bottom of the third guide groove 112 and / or the groove 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 guide groove 111 and the second guide groove 211 and the first guide member 41 in the group of V-shaped grooves. Due to manufacturing tolerance, when aligning the first guide groove 111 and the second guide groove 211, there may be a certain misalignment between the third guide groove 112 and the fourth guide groove 212, but since at least one of the two is a plane groove, the position of the second guide member 42 in the plane groove can be fine-tuned along the groove bottom of the plane groove, thereby solving the problem of difficulty in assembling the second guide member 42 caused by the misalignment of the third guide groove 112 and the fourth guide groove 212. The setting of the plane groove means that a certain distance deviation is allowed between the center of the plane groove and the center of the guide groove directly opposite to it, that is, a certain range of manufacturing tolerance is allowed between the movable carrier 20 and the fixed frame 10, which reduces the precision requirements for the processing and manufacturing of the movable carrier 20 and the fixed frame 10, and reduces the processing and assembly costs.

[0126] In some embodiments, one of the third guide groove 112 and the fourth guide groove 212 is a plane groove, and the other is a V-shaped groove. The second guide member 42 can slide along the bottom of the plane groove for fine adjustment during assembly, and can be inserted into the V-shaped groove directly, and be limited by the V-shaped groove. The second guide member 42 realizes the supporting function of the movable carrier 20, which reduces the processing requirements and has the effect of being easier to assemble and improving the assembly efficiency.

[0127] In this embodiment, the third guide groove 112 and the fourth guide groove 212 are both plane grooves. The second guide member 42 can be slid and fine-tuned along the groove bottom of the third guide groove 112 and the groove bottom of the fourth guide groove 212 during assembly, that is, the second guide member 42 can be fine-tuned in the direction of approaching or moving away from the first guide member 41, and the second guide member 42 can support the movable carrier 20. Compared with the method of setting one of them as a plane groove, the processing accuracy requirements for the movable carrier 20 and / or the fixed frame 10 are further reduced, and in particular, a certain range of processing tolerances can be allowed at the third guide groove 112 and the fourth guide groove 212.

[0128] 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.

[0129] In some embodiments, Figure 6 As shown, the guide assembly 40 is implemented as a ball 43, and the guide assemblies 40 on both sides respectively include at least one ball 43, and a 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, Figure 6 As indicated by the dotted line, 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 get stuck than the point contact between the ball 43 and the movable carrier 20 and the fixed frame 10.

[0130] The present 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, which passes through from the outer surface to the inner surface. The pre-pressing assembly 31 is connected to the outer surface of the first frame side portion 12. The side of the pre-pressing 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-pressing assembly 31 to the outer surface of the first frame side portion 12. Compared with connecting the pre-pressing assembly 31 to the inner surface of the first frame side portion 12, it is easier to assemble, and this layout is conducive to reducing the gap between the first frame side portion 12 and the first carrier side portion 22, and keeping the drive mechanism structure compact.

[0131] In some embodiments, the pre-pressing assembly 31 includes a main body 311 and a fixing portion 312, the fixing portion 312 is connected to the outer surface of the first frame side portion 12, and the main body 311 abuts against the actuating assembly 32, specifically, abuts against 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 to move toward the movable carrier 20, so that the friction head 323 on the piezoelectric vibrator 322 applies a pre-pressing force P perpendicular to the direction of the central axis O to the movable carrier 20, and under the abutment of the pre-pressing force P, the movable carrier 20 can be driven by the friction head 323.

[0132] In some embodiments, the pre-pressing component 31 is an elastic structure, and further, the elastic structure can be a planar structure, such as a spring. This also means that the main body 311 and the fixing part 312 are an integrated structure, and the structure of the pre-pressing component 31 is more reliable to ensure that the pre-pressing force P can be continuously and stably provided, and the plane where the planar structure is located is extended perpendicular to the direction of the pre-pressing force P.

[0133] 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 a pre-pressure P thereto.

[0134] In some embodiments, the prestressing assembly 31 may also be a prestressing plate, with the two ends of the prestressing plate forming a fixing portion 312, and the middle of the prestressing plate forming a main body 311. Specifically, the prestressing plate may be a plastic part or a metal part or other rigid structure, such as a hard plate body, a stainless steel plate, a ceramic, or a diamond formed by injection molding. Alternatively, the prestressing plate includes 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 formed into an integrated structure with the outer layer structure, such as plastic, through an insert injection molding process.

[0135] Furthermore, the pre-stressing component 31 also includes a support member arranged on the side of the pre-stressing 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 pre-stressing component 31 can always contact the actuating component 32 when the piezoelectric vibrator 322 is deformed, that is, the pre-stressing component 31 directly contacts the piezoelectric vibrator 322, or indirectly contacts the piezoelectric vibrator 322 through the piezoelectric circuit board 321, thereby providing a pre-stress P for the friction head 323.

[0136] In some embodiments, Fig.15 , Fig.16 As shown, 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 that 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 .

[0137] 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. During 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.

[0138] 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 .

[0139] Furthermore, the fixed frame 10 is provided with an opening 192 penetrating from the outer surface of the first frame side portion 12 to the inner surface thereof, 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 to abut against the movable carrier 20, and the pre-stressing assembly 31 is connected to the outer surface of the first frame side portion 12, which is easier 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 driving mechanism structure compact.

[0140] It can be understood that, along the direction of the pre-pressure P, that is, along the installation direction between the piezoelectric vibrator 322, the buffer 314, and the structural member 313, the projections of the buffer 314 and the actuating assembly 32 completely fall within the opening 192, so that the buffer 314 and the actuating 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 pre-pressure P, the projection of the structural member 313 partially exceeds the range of the opening 192, and the area of ​​the structural member 313 corresponding to the projection of the part exceeding the opening 192 is connected to the outer surface of the first frame side portion 12, so that the structural member 313 is fixed 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 connecting areas between the structural member 313 and the fixed frame 10 to ensure a certain connection strength, and the buffer member 314 is centrally arranged relative to the structural member 313 so that the two ends of the structural member 313 can be symmetrically stressed.

[0141] 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 being attached to the actuating assembly 32, and the second side surface 3142 is suitable for being attached 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 beneficial 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.

[0142] 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.

[0143] As a supplement, the specific implementation of the pre-stressing component 31 forming the first magnetic attraction component 52 includes but is not limited to: 1) the pre-stressing component 31 is a spring sheet, and the spring sheet is a material suitable for being adsorbed 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 a material suitable for being adsorbed 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 a material suitable for being adsorbed by a magnet. It can be understood that in these three cases, the second magnetic attraction component 51 is a magnet, and the magnet adsorbs the pre-stressing component 31.

[0144] 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.

[0145] In some embodiments, the friction head 323 is made of wear-resistant material, 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 the wear resistance, it is beneficial to extend the service life of the friction head 323.

[0146] In contrast, 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 the wear resistance, it is beneficial to extend the service life.

[0147] 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.

[0148] It is understandable that the present application does not impose any specific restrictions on the specific shapes of the friction head 323 and the friction-resistant plate 29. In a specific embodiment, the shape of the friction head 323 can be a sphere, a hemisphere, a cuboid, a table, a cylinder, a semi-cylinder, etc., and the friction-resistant plate 29 can be a sheet or a block. In this embodiment, the friction head 323 is cylindrical, the friction-resistant plate 29 is a sheet, and the friction head 323 is in line contact with the wear-resistant part of the movable carrier 20, which has greater friction than point contact, that is, greater driving force F, that is, better driving effect.

[0149] 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.

[0150] In some embodiments, the number of the friction heads 323 may be one or two or more. For example, in this embodiment, two friction heads 323 are provided on one 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 direction.

[0151] It should be understood that in some embodiments of the present application, along the driving direction of the driving assembly 30, at least two friction heads 323 are provided on the side of the piezoelectric vibrator 322 facing the movable carrier 20, thereby increasing the driving stroke. In addition, since at least two friction heads 323 are provided on the side of the piezoelectric vibrator 322 facing the movable carrier 20, the actuating assembly 32 of the driving assembly 30 is less likely to tilt during installation. And under the action of at least one set of magnetic suction assemblies 50, when the actuating assembly 32 includes at least two friction heads 323, the movable carrier 20 is more likely to remain parallel to the fixed frame 10.

[0152] 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 beneficial to realize the focusing function or the anti-shake function, thereby improving the imaging quality.

[0153] 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, thereby converting the vertical light into horizontal light and incident on the inside 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, and the movable carrier 20 can achieve focusing when moving along the direction of the central axis O.

[0154] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. 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.

2. The driving mechanism according to claim 1, 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.

3. The driving mechanism according to claim 2, 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.

4. 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 respectively arranged on both sides of the driving assembly.

5. The driving mechanism according to claim 4, 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.

6. The driving mechanism according to claim 5, 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.

7. The driving mechanism according to claim 6, 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.

8. The driving mechanism according to claim 6, 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.

9. The driving mechanism according to claim 6, 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.

10. The driving mechanism according to claim 5, 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.

11. The driving mechanism according to claim 10, 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.

12. The driving mechanism according to any one of claims 1 to 11, 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.

13. The driving mechanism according to claim 12, 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.

14. The driving mechanism according to claim 2, characterized in that: 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.

15. The driving mechanism according to claim 1, characterized in that: 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.

16. 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 15, the optical lens is arranged on the movable carrier.

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