Clamping mechanism

Abstract

The utility model discloses a clamping mechanism which comprises a first clamping arm and a second clamping arm which are oppositely arranged, the first clamping arm and the second clamping arm are used for clamping a lens module, the first clamping arm comprises at least three first clamping parts, and the first clamping parts are arranged along the direction from the first clamping arm to the second clamping arm. The at least three first clamping parts protrude out of the side wall of the first clamping arm, and the included angle formed by any first clamping part and the connecting line of the two adjacent first clamping parts is smaller than 180 degrees. The second clamping arm comprises a second clamping part, and the second clamping part is used for abutting against the lens module. According to the clamping mechanism provided by the utility model, when the first clamping arm and the second clamping arm are used for clamping the lens module, stable surface contact can be formed between the at least three first clamping parts and the lens module, and on the basis, the second clamping parts are also propped against the lens module, so that the lens module can be clamped more stably. Therefore, the clamping stability of the two clamping arms to the lens module can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping equipment, in particular to a clamping mechanism. Background Art

[0002] With the continuous upgrading of the pixels of the photoelectric imaging sensor, the demand for the resolution of the lens module is also increasing, which leads to a smaller and smaller margin of the resolution of the lens module relative to the photoelectric imaging sensor, that is, the focal depth range of the lens module is getting smaller and smaller, which requires the continuous improvement of the assembly accuracy of the lens module to adapt to the focal depth range of the lens module. In the assembly process of the lens module of the prior art, the lens module is mostly clamped and fixed by a clamping mechanism to improve the assembly accuracy of the lens module, but the existing clamping mechanism is mostly a flat plate structure with high hardness, which can easily lead to point contact or line contact between the clamping mechanism and the lens module, so that the lens module shakes or deviates relative to the clamping mechanism, which will directly affect the assembly accuracy of the lens module.

[0003] Therefore, how to improve the clamping stability of the lens module to improve the assembly accuracy of the lens module has become a difficult problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] The utility model provides a clamping mechanism for improving the clamping stability of a lens module.

[0005] The utility model provides a clamping mechanism, comprising a first clamping arm and a second clamping arm arranged opposite to each other, the first clamping arm and the second clamping arm are used to clamp a lens module, wherein the first clamping arm comprises at least three first clamping parts, and along the direction from the first clamping arm to the second clamping arm, at least three first clamping parts protrude from the side wall of the first clamping arm; and the angle formed by any first clamping part and the connecting line of two adjacent first clamping parts is less than 180°. The second clamping arm comprises a second clamping part, and the second clamping part is used to abut against the lens module.

[0006] By adopting the clamping mechanism provided by the utility model, when the lens module is clamped by the first clamping arm and the second clamping arm, a stable surface contact can be formed between at least three first clamping parts and the lens module. On this basis, since the second clamping part also abuts against the lens module, a reliable clamping force acting on the lens module can be formed between the first clamping part and the second clamping part, thereby effectively improving the clamping stability of the two clamping arms on the lens module.

[0007] In a possible implementation of the utility model, the first clamping arm includes at least four first clamping parts, and the at least four first clamping parts are arranged in an array. Since the resultant force of the forces applied by the at least four first clamping parts to the lens module can be located inside the area surrounded by the first clamping parts, in the design process of the second clamping arm, the position of the second clamping part can be determined according to the position of the resultant force of the forces applied by the first clamping parts, so as to further improve the clamping stability requirements of the clamping mechanism and effectively reduce the design difficulty of the first clamping arm and the second clamping arm.

[0008] In a possible implementation of the utility model, along the direction from the second clamping arm to the first clamping arm, at least part of the projection of the second clamping portion on the first clamping arm is located at the center of the interval surrounded by at least four first clamping portions. In this way, when the part of the second clamping portion whose projection is located at the center of the interval surrounded by the above-mentioned first clamping portions abuts against the lens module, the force applied by the second clamping portion to the lens module is equal in magnitude and opposite in direction to the resultant force applied by the at least four first clamping portions to the lens module, which is conducive to further improving the clamping stability of the lens module by the clamping portion.

[0009] In a possible implementation of the utility model, the first clamping arm includes three first clamping parts, and the projection of any first clamping part on the line connecting the other two first clamping parts is located between the other two first clamping parts. So that the combined force of the three first clamping parts exerting on the lens module is located between the three first clamping parts, which is conducive to reducing the design difficulty of the first clamping arm while satisfying the clamping stability of the clamping arm.

[0010] In a possible implementation of the present invention, the clamping mechanism further includes a bracket, and the first clamping arm and the second clamping arm are both slidably connected to the bracket along the direction from the first clamping arm toward the second clamping arm. This is conducive to improving the stability of the clamping mechanism and the convenience of moving the clamping arm.

[0011] In a possible implementation of the utility model, the side wall of the first clamping arm includes a first cylindrical surface, the axis of the first cylindrical surface is close to the second clamping arm relative to the first clamping arm, and is perpendicular to the direction from the first clamping arm to the second clamping arm, and is perpendicular to the direction from the first clamping arm to the bracket; the first clamping portion is located on the first cylindrical surface, and the first clamping portion includes a first surface, and the first surface is used to abut against the side wall of the lens module. In this way, when the clamped surface of the lens module is a cylindrical surface, the clamping mechanism can effectively improve the clamping reliability between the clamping portion and the lens module.

[0012] In a possible implementation of the utility model, along the direction of the first clamping arm toward the bracket, at least two first clamping parts are arranged on both sides of the axis, and the angle between the tangent planes of the first surfaces of the at least two first clamping parts arranged on both sides of the axis is α, and 60°≤α≤120°. This is conducive to improving the versatility of the clamping mechanism while ensuring the clamping stability of the lens module.

[0013] In a possible implementation of the present invention, the first surface includes a second cylindrical surface, the axis of the second cylindrical surface is close to the second clamping arm relative to the first clamping arm, and is perpendicular to the direction from the first clamping arm to the second clamping arm, and is perpendicular to the direction from the first clamping arm to the bracket. In this way, when the clamped surface of the lens module is a cylindrical surface, it is helpful to improve the clamping stability of the clamping mechanism on the lens module.

[0014] In a possible implementation of the present invention, the first clamping portion is in the shape of an elongated strip, and the length direction of the first clamping portion is the direction of the first clamping arm toward the bracket, which can improve the clamping stability of the clamping portion on the lens module and make the structure of the first clamping portion more concise.

[0015] In a possible implementation of the present invention, the second clamping portion protrudes from the side wall of the second clamping arm along the direction from the second clamping arm toward the first clamping arm, so that the clamping stability of the clamping portion on the lens module can be improved while making the structure of the second clamping portion more concise.

[0016] In a possible implementation of the present invention, the second clamping portion is in the shape of an elongated strip, and the length direction of the second clamping portion is the direction of the second clamping arm toward the bracket, which is conducive to improving the clamping stability of the clamping portion on the lens module while making the structure of the second clamping portion more concise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of the clamping mechanism provided by the utility model;

[0018] Figure 2 for Figure 1 A partial schematic diagram of a clamping mechanism is provided;

[0019] Figure 3 for Figure 1 Another partial schematic diagram of the clamping mechanism provided;

[0020] Figure 4 Another structural schematic diagram of the clamping mechanism provided by the utility model;

[0021] Figure 5 A third structural schematic diagram of the clamping mechanism provided by the utility model;

[0022] Figure 6 for Figure 5 A partial enlarged view of the clamping mechanism at point A is provided;

[0023] Figure 7 A schematic diagram of the clamping state between the clamping mechanism and the lens module provided by the utility model;

[0024] Figure 8 A force analysis diagram of the lens module provided by the utility model;

[0025] Fig. 9 A fourth structural schematic diagram of the clamping mechanism provided by the utility model;

[0026] Fig.10 This is a fifth structural schematic diagram of the clamping mechanism provided by the utility model.

[0027] Figure markings: 01-lens module; 1-first clamping arm; 11-first clamping portion; 111-first surface; 1111-second cylindrical surface; 12-slider; 13-first cylindrical surface; 2-second clamping arm; 21-second clamping portion; 3-bracket; 31-slide groove. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein. The same figure marks in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing position and direction described in the embodiments of the utility model are all explained with reference to the accompanying drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of the utility model. The drawings of the embodiments of the utility model are only used to illustrate the relative position relationship, and they do not represent the true proportions.

[0029] It should be noted that specific details are described in the following description to facilitate understanding of the present invention. However, the present invention can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] With the continuous upgrading of the pixels of the photoelectric imaging sensor, the demand for the resolution of the lens module is also increasing, which leads to a smaller and smaller margin of the resolution of the lens module relative to the photoelectric imaging sensor, that is, the focal depth range of the lens module is getting smaller and smaller, which requires the continuous improvement of the assembly accuracy of the lens module to adapt to the focal depth range of the lens module. In the assembly process of the lens module of the prior art, the lens module is mostly clamped and fixed by a clamping mechanism to improve the assembly accuracy of the lens module, but the existing clamping mechanism is mostly a flat plate structure with high hardness, which can easily lead to point contact or line contact between the clamping mechanism and the lens module, so that the lens module shakes or deviates relative to the clamping mechanism, which will directly affect the assembly accuracy of the lens module.

[0031] In view of this, the clamping mechanism provided by the present invention forms a surface contact between the clamping arm on at least one side of the clamping mechanism and the lens module, so as to realize the stable clamping of the lens module by the clamping mechanism, thereby improving the assembly accuracy of the lens module. In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] refer to Figure 1 , Figure 1 The schematic diagram of the structure of the clamping mechanism provided by the utility model is as follows. The clamping mechanism comprises a first clamping arm 1 and a second clamping arm 2 which are arranged opposite to each other along the Y-axis direction, and Figure 1 As shown, the first clamping arm 1 and the second clamping arm 2 are used to clamp the lens module 01.

[0033] refer to Figure 2 , Figure 2 for Figure 1 A partial schematic diagram of a clamping mechanism is provided, which is used to show a first clamping arm 1. The first clamping arm 1 includes at least three first clamping portions 11, and along the direction from the first clamping arm 1 to the second clamping arm 2 (such as Figure 2 In the negative direction of the Y axis shown in FIG. 1 , at least three first clamping portions 11 protrude from the side wall of the first clamping arm 1. The angle formed by any first clamping portion 11 and the connecting line of two adjacent first clamping portions 11 is γ, and γ<180°, that is, the connecting line of at least three first clamping portions 11 in the side wall of the first clamping arm 1 is not collinear. Exemplary angle γ can be as follows: Figure 2 The angle formed by the two dotted lines in .

[0034] In the present invention, the specific configuration of the first clamping portion 11 is not limited, and it can be exemplarily a protrusion protruding from the first clamping arm 1 , which can effectively improve the structural simplicity of the first clamping portion 11 .

[0035] Figure 3 for Figure 1 Another partial schematic diagram of the clamping mechanism is provided to illustrate the second clamping arm 2. Figure 1 and Figure 3 The second clamping arm 2 includes a second clamping portion 21 for contacting with the lens module 01. It is worth mentioning that along the direction of the second clamping arm 2 toward the first clamping arm 1 (such as Figure 3 In the Y-axis direction shown in the figure), the second clamping portion 21 can protrude from the side wall of the second clamping arm 2, which is beneficial to improving the abutment reliability between the second clamping portion 21 and the lens module 01.

[0036] The utility model does not limit the specific shape of the first clamping portion 11 and the second clamping portion 21. For example, the first clamping portion 11 and the second clamping portion 21 can be a convex block protruding from the side wall of the clamping arm. The convex block can be a long strip, and the length direction of the convex block is as follows: Figure 3 In the X-axis direction shown, this can improve the clamping stability of the two clamping parts on the lens module 01 while making the structure of the clamping parts more concise.

[0037] In addition, by adopting the clamping mechanism provided by the utility model, since at least three first clamping parts 11 protrude from the side wall of the first clamping arm 1, and the angle formed by any first clamping part 11 and the line connecting two adjacent first clamping parts 11 is less than 180°, when the lens module 01 is clamped by the first clamping arm 1 and the second clamping arm 2, a stable surface contact can be formed between the at least three first clamping parts 11 and the lens module 01, and on this basis, since the second clamping part 21 is also in contact with the lens module 01, a reliable clamping force acting on the lens module 01 can be formed between the first clamping part 11 and the second clamping part 21, thereby effectively improving the clamping stability of the two clamping arms on the lens module 01.

[0038] In a specific embodiment, Figure 1 and Figure 2 As shown, the first clamping arm 1 includes three first clamping parts 11, and the projection of any first clamping part 11 on the line connecting the other two first clamping parts 11 is located between the other two first clamping parts 11. That is, the figure formed by the lines connecting the projections of the first clamping parts 11 on the side wall of the first clamping arm 1 is an acute triangle, so that the combined force of the forces applied by the above three first clamping parts 11 to the lens module 01 can fall within the above acute triangle, which is conducive to reducing the design difficulty of the first clamping arm 1 while satisfying the clamping stability of the clamping arm.

[0039] It is worth mentioning that the acute-angled triangle can be exemplarily distributed in an axisymmetric manner, so that the resultant force of the three first clamping portions 11 exerting on the lens module 01 is located at the center of the triangle, and at the same time, along the Y-axis direction, at least part of the projection of the second clamping portion 21 on the first clamping arm 1 is located at the center of the interval surrounded by the three first clamping portions 11. This is conducive to further improving the clamping stability of the clamping arm.

[0040] In addition, in a specific embodiment, reference Figure 4 , Figure 4 Another structural schematic diagram of the clamping mechanism provided by the utility model is used to show the first clamping arm 1. Among them, the first clamping arm 1 includes at least four first clamping parts 11, and the at least four first clamping parts 11 are arranged in an array. It can be understood that the center of the figure surrounded by the lines of the projections of the at least four first clamping parts 11 on the side wall of the first clamping arm 1 is located inside the figure, and the resultant force of the forces applied by the at least four first clamping parts 11 to the lens module 01 is located inside the above figure. In this way, during the design process of the second clamping arm 2, the position of the second clamping part 21 can be determined according to the position of the resultant force of the forces applied by the above-mentioned first clamping part 11. For example, along the Y-axis direction, the second clamping part 21 can be arranged relative to the internal area of ​​the above-mentioned figure, which can effectively reduce the design difficulty of the first clamping arm 1 and the second clamping arm 2 while further improving the clamping stability of the above-mentioned clamping mechanism.

[0041] In addition, illustratively, the first clamping arm 1 includes four first clamping portions 11 protruding from the side wall of the first clamping arm 1, and the figure formed by the lines connecting the projections of the first clamping portions 11 on the side wall of the first clamping arm 1 is a rectangle. In this way, the center of the figure formed by the lines connecting the projections of the four first clamping portions 11 on the side wall of the first clamping arm 1 is located inside the figure, and the position of the resultant force of the forces applied by at least four first clamping portions 11 to the lens module 01 coincides with the center.

[0042] It is worth mentioning that the reference Figure 3 and Figure 4 As shown, along the direction from the second clamping arm 2 to the first clamping arm 1, at least part of the projection of the second clamping portion 21 on the first clamping arm 1 is located at the center of the interval surrounded by at least four first clamping portions 11. Since the second clamping portion 21 is used to abut against the lens module 01, when the part of the second clamping portion 21 projected at the center of the interval surrounded by the first clamping portions 11 abuts against the lens module 01, the force applied by the second clamping portion 21 to the lens module 01 will be equal in magnitude and opposite in direction to the resultant force applied by the at least four first clamping portions 11 to the lens module 01, which is conducive to further improving the clamping stability of the clamping arm to the lens module 01.

[0043] In addition, if Figure 1 As shown, the clamping mechanism can also be provided with a bracket 3, and along the direction from the first clamping arm 1 to the second clamping arm 2, the bracket 3 is provided with a slide groove 31, and the first clamping arm 1 and the second clamping arm 2 are both slidably connected to the bracket 3. Specifically, a slider 12 is provided at one end of the two clamping arms close to the bracket 3, and the slider 12 is inserted into the slide groove 31. This is conducive to improving the stability of the clamping mechanism and the convenience of moving the clamping arm.

[0044] It can be understood that the clamping mechanism is also provided with a driving motor for driving the clamping arm to move, thereby improving the degree of automation of the clamping mechanism.

[0045] In addition, in a specific embodiment, reference Figure 5 , Figure 5 This is a third structural schematic diagram of the clamping mechanism provided by the utility model, which is used to show the first clamping arm 1. The side wall of the first clamping arm 1 includes a first cylindrical surface 13, the axis of the first cylindrical surface 13 is close to the second clamping arm 2 relative to the first clamping arm 1, and is perpendicular to the direction from the first clamping arm 1 to the second clamping arm 2, and perpendicular to the direction from the first clamping arm 1 to the bracket 3.

[0046] refer to Figure 6 , Figure 6 for Figure 5 A partial enlarged view of the clamping mechanism at A is provided. In this embodiment, the clamping mechanism includes three first clamping portions 11, and the three first clamping portions 11 are located on the first cylindrical surface 13. At the same time, the first clamping portion 11 includes a first surface 111, and the first surface 111 is used to abut against the side wall of the lens module 01. Figure 6 As shown, along the direction of the first clamping arm 1 toward the bracket 3, at least two first clamping parts 11 are arranged at intervals, and the angle between the cut surfaces of the first surfaces 111 of the at least two first clamping parts 11 is α, and 0°<α≤180°. Therefore, it is beneficial to improve the versatility of the clamping mechanism while ensuring the clamping stability of the lens module 01.

[0047] It is understandable that when the clamped surface of the lens module 01 is a cylindrical surface, the clamping mechanism can effectively improve the clamping reliability between the clamping portion and the lens module 01. In addition, the angle between the cut surfaces of the first surfaces 111 of the two first clamping portions 11 can be adjusted as needed. Specifically, the angle between the cut surfaces of the first surfaces 111 of the two first clamping portions 11 can be changed by changing the curvature of the first cylindrical surface 13, or the spacing distance between the two first clamping portions 11 can be changed along the direction of the first clamping arm 1 toward the bracket 3.

[0048] It is worth mentioning that Figure 6As shown, the first surface 111 includes a second cylindrical surface 1111, the axis of the second cylindrical surface 1111 is close to the second clamping arm 2 relative to the first clamping arm 1, and is perpendicular to the direction from the first clamping arm 1 to the second clamping arm 2, and perpendicular to the direction from the first clamping arm 1 to the bracket 3. In this way, when the clamped surface of the lens module 01 is a cylindrical surface, it can achieve multi-point contact or even surface contact between the first surface 111 and the lens module 01, which is conducive to improving the clamping stability of the clamping mechanism on the lens module 01.

[0049] In addition, if Figure 7 As shown, when the clamping mechanism and the lens module 01 are in a clamping state, refer to Figure 8 , Figure 8 This is a force analysis diagram of the lens module provided by the utility model. The angle α between the cut surfaces of the first surfaces 111 of the two first clamping parts 11 is exemplarily 60°≤α≤120°. Compared with the case of a clamping mechanism with an angle α in other ranges (hereinafter referred to as state 1), in the actual application process, the above clamping mechanism only needs to apply a clamping force less than state 1 to make the same lens module 01 reach a stable state, thereby reducing the risk of damage to the lens module 01 caused by applying too large a clamping force. At the same time, it can also extend the service life of the clamping mechanism.

[0050] It is understandable that the number of the first clamping parts 11 can be adjusted according to the actual clamping requirements. For example, Fig. 9 , Fig. 9 This is a fourth structural schematic diagram of the clamping mechanism provided by the utility model. Figure 5 The first clamping portion 11 shown in FIG. is different in that Fig. 9 In the illustrated embodiment, the clamping mechanism includes four first clamping portions 11, and the four first clamping portions 11 are distributed in a matrix. Since the resultant force of the forces applied by the four first clamping portions 11 to the lens module can be located inside the figure surrounded by the above-mentioned first clamping portions 11, the position of the second clamping portion 21 can be determined according to the position of the resultant force of the forces applied by the above-mentioned first clamping portions 11 during the design of the second clamping arm 2, so as to further improve the clamping stability requirements of the above-mentioned clamping mechanism while effectively reducing the design difficulty of the first clamping arm 1 and the second clamping arm 2.

[0051] In addition, refer to Fig.10 , Fig.10 This is a fifth structural schematic diagram of the clamping mechanism provided by the utility model. In addition, along the X-axis direction, two adjacent first clamping parts 11 can be connected as a whole and are in a long strip shape, which can effectively reduce the processing difficulty of the clamping part and realize multi-point contact or even surface contact between the first clamping part 11 and the lens module 01.

[0052] After understanding the structure and design principle of the clamping mechanism provided by the present invention, the force analysis of the clamping mechanism provided by the present invention is performed by taking the four first clamping parts 11 arranged in a matrix on the first cylindrical surface 13 as an example, as follows:

[0053] Among them, two equal friction forces μ*f are formed between the four first clamping parts and the lens module; the friction force between the second clamping part 21 and the lens module 01 is μ*F;

[0054] μ*(F+2*f)>mg; f=F / 2*sin(α / 2);

[0055] Then μ*(F+F / sin(α / 2))>mg; F=k*mg* sin(α / 2) / (μ*(1+ sin(α / 2)))

[0056] Where: μ: friction coefficient between the gripper and the product;

[0057] F: Clamping force of one contact point on one side;

[0058] f: one of the two clamping forces at four contact points on one side;

[0059] mg: weight of the product;

[0060] K: safety factor.

[0061] The safety factor is generally determined based on the impact force generated during the normal handling process. For example, 2≤K≤6.

[0062] The friction coefficient μ can be adjusted by changing the material or surface roughness of the clamping part and the lens module, or the size of α.

[0063] For example, when the μ value is 0.2 and α is 120°, 2f=F / sin60, f=0.58F. And F=k*mg / 0.431, when K is 4, F≈9.3mg, and the clamping force generated by the clamping mechanism is about 10 times the weight of the lens module.

[0064] When μ is 0.2 and α is 90°, 2f=F / sin45, f=0.71F. And F=k*mg / 0.483, when K is 4, F≈8.28mg, which means that the clamping force generated by the clamping mechanism is about 9 times the weight of the lens module.

[0065] When the μ value is 0.2 and α is 60°, 2f=F / sin30, f=F. And F=k*mg / 0.6, then when K is 4, F≈6.67mg, and the clamping force generated by the clamping mechanism is about 7 times the weight of the lens module.

[0066] In summary, when the μ value is 0.25≤μ≤0.6 and the safety factor K value is 2≤K≤4, 2mg≤F≤8mg, the clamping force generated by the clamping mechanism is about 5 times the weight of the lens module.

[0067] It can be seen that the clamping mechanism provided by the utility model protrudes at least three first clamping parts 11 from the side wall of the first clamping arm 1, and the angle formed by any first clamping part 11 and the line connecting two adjacent first clamping parts 11 is less than 180°. In this way, when the first clamping arm 1 and the second clamping arm 2 clamp the lens module 01, a stable surface contact can be formed between the at least three first clamping parts 11 and the lens module 01. On this basis, since the second clamping part 21 is also in contact with the lens module 01, a reliable clamping force acting on the lens module 01 can be formed between the first clamping part 11 and the second clamping part 21, thereby effectively improving the clamping stability of the two clamping arms on the lens module 01.

[0068] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A clamping mechanism, characterized in that: The clamping mechanism comprises a first clamping arm (1) and a second clamping arm (2) which are arranged opposite to each other, wherein the first clamping arm (1) and the second clamping arm (2) are used to clamp the lens module (01), wherein: The first clamping arm (1) comprises at least three first clamping portions (11), and along the direction from the first clamping arm (1) to the second clamping arm (2), at least three of the first clamping portions (11) protrude from the side wall of the first clamping arm (1); and an angle formed by a line connecting any one of the first clamping portions (11) and two adjacent first clamping portions (11) is less than 180°; The second clamping arm (2) comprises a second clamping portion (21), and the second clamping portion (21) is used for abutting against the lens module (01).

2. The clamping mechanism according to claim 1, characterized in that: The first clamping arm (1) comprises at least four first clamping portions (11), and the at least four first clamping portions (11) are arranged in an array.

3. The clamping mechanism according to claim 2, characterized in that: Along the direction from the second clamping arm (2) toward the first clamping arm (1), at least part of the projection of the second clamping portion (21) on the first clamping arm (1) is located at the center of the interval surrounded by at least four of the first clamping portions (11).

4. The clamping mechanism according to claim 1, characterized in that: The first clamping arm (1) comprises three first clamping portions (11), and a projection of any first clamping portion (11) on a line connecting the other two first clamping portions (11) is located between the other two first clamping portions (11).

5. The clamping mechanism according to any one of claims 1 to 4, characterized in that: The clamping mechanism further comprises a bracket (3), and along the direction from the first clamping arm (1) to the second clamping arm (2), the first clamping arm (1) and the second clamping arm (2) are both slidably connected to the bracket (3).

6. The clamping mechanism according to claim 5, characterized in that: The side wall of the first clamping arm (1) includes a first cylindrical surface (13), the axis of the first cylindrical surface (13) is close to the second clamping arm (2) relative to the first clamping arm (1), and is perpendicular to the direction from the first clamping arm (1) to the second clamping arm (2), and is perpendicular to the direction from the first clamping arm (1) to the bracket (3); the first clamping portion (11) is located on the first cylindrical surface (13), and the first clamping portion (11) includes a first surface (111), and the first surface (111) is used to abut against the side wall of the lens module (01).

7. The clamping mechanism according to claim 6, characterized in that: Along the direction of the first clamping arm (1) toward the bracket (3), at least two of the first clamping portions (11) are arranged on both sides of the axis, and the angle between the tangent planes of the first surfaces (111) of at least two of the first clamping portions (11) arranged on both sides of the axis is α, and 60°≤α≤120°.

8. The clamping mechanism according to claim 7, characterized in that: The first surface (111) includes a second cylindrical surface (1111), the axis of which is close to the second clamping arm (2) relative to the first clamping arm (1), and is perpendicular to the direction from the first clamping arm (1) to the second clamping arm (2), and is perpendicular to the direction from the first clamping arm (1) to the bracket (3).

9. The clamping mechanism according to claim 5, characterized in that: The first clamping portion (11) is in the shape of an elongated strip, and the length direction of the first clamping portion (11) is the direction from the first clamping arm (1) toward the bracket (3).

10. The clamping mechanism according to claim 1, characterized in that: Along the direction from the second clamping arm (2) toward the first clamping arm (1), the second clamping portion (21) protrudes from the side wall of the second clamping arm (2).

11. The clamping mechanism according to claim 5, characterized in that: The second clamping portion (21) is in the shape of an elongated strip, and the length direction of the second clamping portion (21) is the direction from the second clamping arm (2) toward the bracket (3).

Images