Buffer device and test mechanism of camera module

Abstract

The utility model specifically discloses a buffer device and a test mechanism of a camera module, belonging to the technical field of camera test equipment, comprising a base, a shell and a hydraulic assembly, the shell is provided with a through hole along the axial direction, a buffer solution is loaded in a cylinder body, one end of a movable rod movably passes through the cylinder body, and the other end of the movable rod is connected with the hydraulic assembly. The other end of the movable rod is provided with a buffering head protruding out of the through hole, the buffering head receives impact force so that the movable rod can move along the through hole, the movable rod compresses the buffering solution and generates a damping effect to absorb the impact force, and compared with spring buffering, vibration generated in the buffering process is reduced, and the buffering is kept stable; the hydraulic assembly is arranged in the shell in a penetrating mode and can move along the through hole of the shell, adjustment of the relative position of the hydraulic assembly and the shell is achieved, adjustment of buffering force is achieved by adjusting the relative position of the hydraulic assembly and the shell, and then the buffering device can be matched with drivers with different strokes or different driving force. And the applicability of the buffer device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of camera testing equipment, in particular to a buffer device and a testing mechanism for a camera module. Background Art

[0002] In the related art, the existing camera test is to place and pick up the camera module in the test socket in a PnP (Plug-and-Play) manner through automatic loading and unloading equipment. Under the action of the automation program, the drive component is constantly turned on and off to realize the two functions of loading and testing the camera module and unloading after the test. When the driver drives the sunshade to close the cover, a buffer device is often used to reduce the impact force to protect the actuator and other components of the driver from damage. The current buffer device uses spring buffering, but during the spring buffering process, the buffer device is prone to vibration, resulting in unstable buffering and affecting the buffering effect. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a buffer device, which can reduce the vibration generated during the buffering process, improve the smoothness of the buffering, and further improve the buffering effect.

[0004] The utility model also provides a testing mechanism for a camera module having the buffer device.

[0005] According to a first aspect of the utility model, a buffer device is provided, comprising: a base, a shell and a hydraulic component, wherein the shell is mounted on the base, the shell is provided with a through hole, and the through hole penetrates the shell along the axial direction of the shell; the hydraulic component is passed through the through hole and can move along the through hole, the hydraulic component comprises a cylinder body and a movable rod, the cylinder body is movably connected to the shell, a buffer is loaded inside the cylinder body, one end of the movable rod is movably passed through the cylinder body, and the other end is provided with a buffer head protruding from the through hole, and the movable rod can move along the through hole.

[0006] The buffer device according to the first embodiment of the utility model has at least the following beneficial effects:

[0007] The utility model embodiment is provided with a base, a shell and a hydraulic component. The shell is provided with a through hole along its axial direction. The interior of the cylinder body is loaded with a buffer. One end of a movable rod is movably inserted in the cylinder body, and the other end of the movable rod is provided with a buffer head protruding from the through hole. The buffer head receives impact force to make the movable rod move along the through hole. The movable rod compresses the buffer to generate a damping effect to absorb the impact force. Compared with the spring buffer, the vibration generated in the buffering process is reduced, so that the buffering process remains stable. The hydraulic component is inserted in the shell, and the hydraulic component can move along the through hole of the shell, so that the relative position of the hydraulic component and the shell is adjusted. By adjusting the relative position of the hydraulic component and the shell, the buffering force of the buffer device is adjusted, so that the buffer device can adapt to drivers with different strokes or different driving forces, thereby improving the adaptability of the buffer device.

[0008] According to some embodiments of the utility model, the base is provided with a mounting hole, the extension direction of the mounting hole is the same as the extension direction of the through hole, and the shell is penetrated by the mounting hole and can move along the mounting hole.

[0009] According to some embodiments of the utility model, a locking hole connected to the through hole is opened on the outer wall of the shell, and the buffer device also includes a locking piece, which is passed through the locking hole and can abut against the outer wall of the cylinder body to limit the movement of the cylinder body.

[0010] According to some embodiments of the utility model, the cylinder body is threadedly connected to the through hole, and the buffer device also includes an adjusting member, which is fixedly connected to one end of the cylinder body away from the movable rod, and the adjusting member can drive the cylinder body to move along the through hole by rotating.

[0011] According to some embodiments of the utility model, the inner wall of the through hole protrudes toward the cylinder body to form a convex ring, the convex ring is sleeved on the cylinder body, the inner wall of the convex ring is provided with a first internal thread, and the outer peripheral wall of the cylinder body is provided with a first external thread matching the first internal thread.

[0012] According to some embodiments of the present invention, the adjusting member protrudes toward the end of the cylinder body to form a protrusion, and the end surface of the cylinder body is provided with a groove corresponding to the protrusion, and the protrusion is buckled with the groove.

[0013] According to some embodiments of the present invention, the inner wall of the mounting hole is provided with a second internal thread, and the outer peripheral wall of the shell is provided with a second external thread matching the second internal thread.

[0014] According to some embodiments of the utility model, the base includes a main body and a movable part, one end of the movable part is connected to the main body, and the other end is loosely fitted with the main body, the movable part and the main body are arranged to form the mounting hole, and the buffer device also includes a fastener, which can drive the movable part to move toward or away from the main body to adjust the aperture of the mounting hole.

[0015] According to some embodiments of the present utility model, the buffer head is a flexible member.

[0016] According to a second aspect of the utility model, a testing mechanism for a camera module is provided, comprising a driving assembly and a buffer device as described in the first aspect above, wherein the driving assembly and the buffer device are spaced apart, and the driving assembly comprises a driver and a driving member that are connected to each other, and the driver can drive the driving member to move toward the buffer device so that the driving member abuts against the buffer head and pushes the buffer head.

[0017] The testing mechanism of the camera module according to the embodiment of the second aspect of the utility model has at least the following beneficial effects: the testing mechanism of the camera module adopts the buffer device of the embodiment of the first aspect, and the driving assembly includes a driver and a driving member that are connected to each other. When the driver drives the driving member to move, the driving member can abut and push the buffer head to make the movable rod of the buffer device compress the buffer, and the damping effect generated by the compressed buffer is absorbed to absorb the impact force of the driving assembly, so that the buffer device can buffer the impact of the driving assembly. Compared with the spring buffer, the vibration generated during the buffering process is reduced to keep the buffering process smooth, so that the testing mechanism of the camera module can remain stable during use, thereby improving the life of the components of the driving assembly.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 It is an axonometric view of a buffer device according to an embodiment of the first aspect of the utility model;

[0021] Figure 2 An exploded view of a buffer device according to an embodiment of the first aspect of the utility model;

[0022] Figure 3 A cross-sectional view of a buffer device according to an embodiment of the first aspect of the utility model;

[0023] Figure 4A schematic diagram of a housing according to an embodiment of the first aspect of the present utility model;

[0024] Figure 5 This is a schematic diagram of a testing mechanism for a camera module according to an embodiment of the second aspect of the utility model.

[0025] Reference numerals:

[0026] Buffer device 10; Testing mechanism 20;

[0027] Base 100; mounting hole 110; main body 120; movable part 130;

[0028] Housing 200; through hole 210; locking hole 220; convex ring 230;

[0029] Hydraulic assembly 300; cylinder body 310; groove 311; movable rod 320; buffer head 321;

[0030] Locking member 400;

[0031] Adjustment member 500; protrusion 510; knob portion 520;

[0032] Fastener 600;

[0033] Driving assembly 700 ; driver 710 ; driving member 720 ; shading plate 730 . DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, inside, outside, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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 therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] In the related art, the existing camera test is to place and pick up the camera module in the test socket in a PnP (Plug-and-Play) manner through automatic loading and unloading equipment. Under the action of the automation program, the drive component is constantly turned on and off to realize the two functions of loading and testing the camera module and unloading after the test. When the driver drives the sunshade to close the cover, a buffer device is often used to reduce the impact force to protect the actuator and other components of the driver from damage. The current buffer device uses spring buffering, but during the spring buffering process, the buffer device is prone to vibration, resulting in unstable buffering and affecting the buffering effect.

[0039] To this end, an embodiment of the utility model proposes a buffer device 10, which can reduce the vibration generated during the impact process, improve the smoothness of the buffering, and further improve the buffering effect.

[0040] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments of the utility model, the buffer device 10 includes a base 100, a shell 200 and a hydraulic assembly 300, wherein the shell 200 is mounted on the base 100, the shell 200 is provided with a through hole 210, the through hole 210 penetrates the shell 200 along the axial direction of the shell 200, the hydraulic assembly 300 is penetrated in the through hole 210 and can move along the through hole 210, the hydraulic assembly 300 includes a cylinder 310 and a movable rod 320, the cylinder 310 is penetrated in the through hole 210, and the cylinder 310 of the hydraulic assembly 300 can move along the through hole 210 to adjust the relative position of the hydraulic assembly 300 and the shell 200, thereby realizing the stepless adjustment of the relative position of the hydraulic assembly 300 and the shell 200. By adjusting the relative position of the hydraulic assembly 300 and the shell 200, the buffer distance between the hydraulic assembly 300 and the driver 710 can be adjusted, thereby realizing the adjustment of the buffer force of the buffer device 10. The buffer device 10 can adjust its buffer force so that the buffer device 10 can adapt to the buffering requirements of different driving forces or different strokes, thereby improving the adaptability of the buffer device 10.

[0041] The cylinder 310 is loaded with a buffer, one end of the movable rod 320 is passed through the cylinder 310, and the other end is provided with a buffer head 321 protruding from the through hole 210, and the movable rod 320 can move along the through hole 210. During the buffering process, the driving member 720 abuts against and pushes the buffer head 321, and the movable rod 320 moves along the axial direction of the cylinder 310 under the push of the driving member 720. The other end of the movable rod 320 compresses the buffer in the cylinder 310 to produce a damping effect to convert the impact energy into heat energy, and absorb the impact force and vibration energy. Compared with the spring buffer, the vibration generated during the impact process is reduced, the smoothness of the buffer is improved, and the buffering effect is improved. The buffer flows inside the cylinder 310 to generate viscous force, and the viscous force of the liquid further absorbs the impact force and vibration, which is conducive to maintaining the stability of the buffering process.

[0042] Reference Figure 2 and Figure 3 In some embodiments of the utility model, the hydraulic assembly 300 is provided in the through hole 210 and can move along the through hole 210, so as to realize the stepless adjustment of the relative position between the hydraulic assembly 300 and the housing 200. The base 100 is provided with a mounting hole 110, and the extension direction of the mounting hole 110 is the same as the extension direction of the through hole 210. The housing 200 is provided in the mounting hole 110, and the housing 200 can move along the mounting hole 110 to adjust the relative position between the housing 200 and the base 100, thereby realizing the stepless adjustment of the relative position between the housing 200 and the base 100. The movement of the housing 200 along the base 100 can drive the movement of the hydraulic assembly 300, further adjust the buffer distance between the hydraulic assembly 300 and the driver 710, and thereby expand the adjustment range of the buffer force of the buffer device 10. The hydraulic component 300 can move along the through hole 210 of the shell 200, and the shell 200 moves along the base 100 to drive the movement of the hydraulic component 300, thereby realizing dual stepless adjustment of the buffer distance between the hydraulic component 300 and the driver 710, further expanding the adjustment range of the buffer force of the buffer device 10, and further improving the adaptability of the buffer device 10.

[0043] Reference Figure 2 and Figure 4 In some embodiments of the utility model, the outer peripheral wall of the housing 200 is provided with a locking hole 220, and the locking hole 220 extends in the radial direction of the housing 200 and penetrates the housing 200, so that the locking hole 220 is connected to the through hole 210. The buffer device 10 is also provided with a locking member 400, and the locking member 400 is penetrated by the locking hole 220. The locking member 400 can move along the locking hole 220 so that the locking member 400 can abut against the outer peripheral wall of the cylinder body 310. The locking member 400 is pressed against the outer peripheral wall of the cylinder body 310 to limit the movement of the cylinder body 310 in the through hole 210, thereby realizing the fixing of the hydraulic assembly 300 after the relative position adjustment between the hydraulic assembly 300 and the housing 200 is completed.

[0044] It is understandable that the locking hole 220 and the locking member 400 are threadedly connected so that the locking member 400 can move along the locking hole 220, thereby realizing that the locking member 400 can press against or detach from the outer peripheral wall of the cylinder body 310. Before driving the cylinder body 310 to move in the through hole 210, the position of the locking member 400 is adjusted first so that the locking member 400 detaches from the outer peripheral wall of the cylinder body 310, and the cylinder body 310 is in a free state. After the relative position of the hydraulic assembly 300 and the housing 200 is adjusted, the position of the locking member 400 relative to the locking hole 220 is adjusted so that the locking member 400 presses against the outer peripheral wall of the cylinder body 310, and the hydraulic assembly 300 is fixed after the relative position of the hydraulic assembly 300 and the housing 200 is adjusted.

[0045] It can be understood that the connection between the locking hole 220 and the locking member 400 can also be achieved by providing a lock buckle on the outer peripheral wall of the through hole 210, so that the locking hole 220 can press against the outer peripheral wall of the cylinder body 310 through the lock buckle, so that the locking member 400 can limit the movement of the cylinder body 310 in the through hole 210. The fixing method of the locking hole 220 can be set according to the actual production space, the size of the parts, etc., and the present application does not limit this.

[0046] Reference Figure 2 and Figure 4 It can be understood that there are two locking holes 220, and the two locking holes 220 are each provided with a locking member 400, and the two locking holes 220 are arranged at intervals around the circumference of the housing 200. The two locking holes 220 and the two locking members 400 are arranged to ensure the fixation of the hydraulic assembly 300 and the housing 200 after the relative position adjustment is completed, thereby improving the stability of the buffering movement. The two locking holes 220 are arranged at intervals around the circumference of the housing 200, so that the pressure on the outer peripheral wall of the cylinder 310 can be evenly distributed, avoiding excessive concentration of stress on the outer peripheral wall of the cylinder 310.

[0047] It is understandable that the number of locking holes 220 can be multiple, and each locking hole 220 is provided with a locking piece 400 to ensure that the hydraulic component 300 is fixed after the relative position of the hydraulic component 300 and the housing 200 is adjusted. The specific number of locking holes 220 and locking pieces 400 can be selected according to actual applications, and this application does not limit this.

[0048] In some embodiments of the utility model, the cylinder body 310 passes through the through hole 210, and the cylinder body 310 and the through hole 210 are threadedly connected to realize that the cylinder body 310 can move along the through hole 210. The cylinder body 310 moves along the through hole 210 to adjust the buffer distance between the hydraulic assembly 300 and the driver 710, thereby adjusting the buffer force of the buffer device 10. The buffer device 10 is also provided with an adjusting member 500, one end of which is fixedly connected to one end of the cylinder body 310 away from the movable rod 320, and the cylinder body 310 is driven to rotate by rotating the adjusting member 500, so that the cylinder body 310 can move along the through hole 210.

[0049] Reference Figure 2 and Figure 3 It is understood that in some embodiments of the present invention, the adjusting member 500 is provided with a knob portion 520, which is located at one end of the adjusting member 500 away from the cylinder body 310, and the cylinder body 310 is driven to rotate by rotating the knob portion 520. The outer peripheral wall of the knob portion 520 is cylindrical, and the knob portion 520 can be manually rotated to adjust the movement of the cylinder body 310 in the through hole 210, thereby avoiding the situation where the knob portion 520 cannot be rotated with a tool due to a small space. The outer peripheral wall diameter of the knob portion 520 is larger than the inner diameter of the through hole 210, which increases the torque of the adjusting member 500 and facilitates the rotation of the knob portion 520.

[0050] Reference Figure 2 In some embodiments of the utility model, the cylinder body 310 and the through hole 210 are threadedly connected, and the buffer device 10 is further provided with an adjusting member 500, which is protruded toward the end of the cylinder body 310 to form a protrusion 510, and the end surface of the cylinder body 310 is provided with a groove 311 corresponding to the protrusion 510, and the protrusion 510 is buckled with the groove 311, and the adjusting member 500 is rotated to drive the rotation of the cylinder body 310, so that the cylinder body 310 can move in the through hole 210. The protrusion 510 is buckled with the groove 311 to prevent the adjusting member 500 from being separated from the cylinder body 310, and ensure that the adjusting member 500 can drive the cylinder body 310 to move in the through hole 210.

[0051] Reference Figure 4 In some embodiments of the utility model, the inner wall of the through hole 210 protrudes toward the cylinder body 310 to form a convex ring 230, the convex ring 230 is sleeved on the cylinder body 310, the inner wall of the convex ring 230 is provided with a first internal thread, the outer peripheral wall of the cylinder body 310 is provided with a first external thread matching the first internal thread, and the cylinder body 310 and the convex ring 230 are threadedly connected. The first internal thread of the convex ring 230 is connected to the second external thread of the cylinder body 310, which saves the setting of the internal thread of the through hole 210, saves costs, facilitates the processing of the internal thread of the through hole 210, and facilitates the installation and disassembly of the cylinder body 310, and avoids the excessive length of the threaded connection between the through hole 210 and the cylinder body 310, which leads to stress concentration at the threaded connection part.

[0052] In some embodiments of the utility model, the inner wall of the mounting hole 110 is provided with a second internal thread, and the outer peripheral wall of the housing 200 is provided with a second external thread matching the second internal thread. The housing 200 and the mounting hole 110 are threadedly connected to ensure that the connection between the housing 200 and the base 100 is more stable and reliable, so that the housing 200 can move along the mounting hole 110. The housing 200 moves along the mounting hole 110, driving the movement of the hydraulic assembly 300 to adjust the buffer distance between the hydraulic assembly 300 and the driver 710, thereby enabling the buffer device 10 to adjust the buffer force.

[0053] In some embodiments of the present invention, the base 100 includes a main body 120 and a movable part 130, one end of the movable part 130 is connected to the main body 120, and the other end is loosely matched with the main body 120, the movable part 130 and the main body 120 are surrounded to form a mounting hole 110, the shell 200 is inserted into the mounting hole 110, and the shell 200 can slide along the mounting hole 110 to adjust the relative position of the shell 200 and the base 100. The buffer device 10 also includes a fastener 600, which can drive the movable part 130 toward or away from the main body 120 to adjust the aperture of the mounting hole 110, so as to limit the movement of the shell 200 along the mounting hole 110, and realize the fixing of the shell 200 after the relative position of the shell 200 and the base 100 is adjusted. The fastener 600 can be moved toward or away from the main body 120 to adjust the aperture of the mounting hole 110 , so that the base 100 can adapt to the housing 200 with different outer diameters, thereby improving the adaptability and flexibility of the base 100 .

[0054] It can be understood that in some embodiments of the present invention, the inner wall of the mounting hole 110 is provided with a second internal thread, the outer peripheral wall of the housing 200 is provided with a second external thread, the second internal thread matches the second external thread, the housing 200 and the mounting hole 110 are threadedly connected, so that the housing 200 can move along the mounting hole 110. The base 100 includes a main body 120 and a movable part 130, one end of the movable part 130 is connected to the main body 120, and the other end is clearance-matched with the main body 120, the movable part 130 and the main body 120 are partially surrounded to form the mounting hole 110, and the buffer device 10 is further provided with a fastener 600, which can drive the movable part 130 to move toward or away from the main body 120 to adjust the aperture of the mounting hole 110. The fastener 600 can move toward the movable part 130 to limit the movement of the housing 200 along the mounting hole 110, so as to achieve the fixing of the housing 200 after the relative position of the housing 200 and the base 100 is adjusted, and the rotation of the housing 200 during the buffering process is avoided.

[0055] It can be understood that the shell 200 is made of stainless steel, which has good corrosion resistance and plasticity. Stainless steel has high strength and is not easy to deform or break. The shell 200 can also be made of metal materials such as aluminum alloy. The material of the shell 200 can be selected according to actual production costs and production needs, and this application does not limit this.

[0056] In some embodiments of the present invention, the buffer head 321 is a flexible member. Compared with the metal buffer block of the existing buffer device, the flexible member can absorb impact energy and reduce vibration, reduce the damage to the movable rod 320 caused by the impact, thereby increasing the life of the hydraulic assembly 300 and improving the smoothness of the buffering process.

[0057] It can be understood that the buffer head 321 is a flexible part. The buffer head 321 can be made of rubber material, which has good wear resistance, oil resistance, chemical stability, etc. It can also be silicone, plastic, etc. The specific material of the buffer head 321 can be selected according to production costs and actual production needs, and this application does not limit this.

[0058] Reference Figure 5 The embodiment of the utility model also proposes a camera module test mechanism 20, including a driving assembly 700 and the buffer device 10 proposed in the above embodiment, the driving assembly 700 and the buffer device 10 are arranged at intervals, and the driving assembly 700 includes a driver 710 and a driving member 720 connected to each other. The driver 710 can drive the driving member 720 to move toward the buffer device 10, so that the driving member 720 abuts against and pushes the buffer head 321, and the movable rod 320 is pushed by the driving member 720, and the other end of the movable rod 320 compresses the buffer in the cylinder body 310. The damping effect generated by compressing the buffer absorbs the impact force of the driving assembly 700, and compared with the spring buffer, the vibration generated during the buffering process is reduced, so that the camera module test mechanism 20 remains stable during use, thereby improving the life of the components of the driving assembly 700.

[0059] Reference Figure 5In some embodiments of the present utility model, the test mechanism 20 of the camera module is further provided with a sunshade 730. During the test of the camera module, the sunshade 730 can be opened and closed. The sunshade 730 is connected to the driving member 720, and the driver 710 drives the driving member 720 to move, thereby driving the movement of the sunshade 730 to realize the opening and closing of the sunshade 730. When the driving assembly 700 drives the sunshade 730 to close, the driving member 720 can abut and push the buffer head 321. Under the push of the driving member 720, one end of the movable rod 320 compresses the buffer in the cylinder body 310. The compressed buffer absorbs the impact force and vibration of the sunshade 730 when closing the cover, and reduces the vibration of the sunshade 730 during the closing process, so that the sunshade 730 remains stable during the closing process, and protects the sunshade 730, the driving assembly 700 and other components.

[0060] It can be understood that in some embodiments of the present invention, the driver 710 can be a pneumatic actuator, which has the advantages of small size, fast response speed, flexible control, and easy adjustment. The driver 710 can also be a motor or other equipment, which can be selected according to actual production applications, and this application is not limited here.

[0061] Since the testing mechanism 20 of the camera module adopts all the technical solutions of the buffer device 10 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0062] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings. Finally, it should be explained that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A buffer device, characterized in that: include: Pedestal; A shell is mounted on the base, the shell is provided with a through hole, and the through hole penetrates the shell along the axial direction of the shell; A hydraulic component is passed through the through hole and can move along the through hole. The hydraulic component includes a cylinder body and a movable rod. The cylinder body is movably connected to the shell. A buffer is loaded inside the cylinder body. One end of the movable rod is movably passed through the cylinder body, and the other end is provided with a buffer head protruding from the through hole. The movable rod can move along the through hole.

2. The buffer device according to claim 1, characterized in that: The base is provided with a mounting hole, the extension direction of the mounting hole is the same as the extension direction of the through hole, and the shell is penetrated through the mounting hole and can move along the mounting hole.

3. The buffer device according to claim 1, characterized in that: The outer wall of the shell is provided with a locking hole connected to the through hole. The buffer device also includes a locking piece, which is passed through the locking hole and can abut against the outer wall of the cylinder body to limit the movement of the cylinder body.

4. The buffer device according to claim 1, characterized in that: The cylinder body is threadedly connected to the through hole. The buffer device also includes an adjusting member, which is fixedly connected to an end of the cylinder body away from the movable rod. The adjusting member can drive the cylinder body to move along the through hole by rotating.

5. The buffer device according to claim 4, characterized in that: The inner wall of the through hole protrudes toward the cylinder body to form a convex ring, the convex ring is sleeved on the cylinder body, the inner wall of the convex ring is provided with a first internal thread, and the outer peripheral wall of the cylinder body is provided with a first external thread matching the first internal thread.

6. The buffer device according to claim 4, characterized in that: The adjusting member protrudes toward the end of the cylinder body to form a convex portion, and the end surface of the cylinder body is provided with a groove corresponding to the convex portion, and the convex portion is buckled with the groove.

7. The buffer device according to claim 2, characterized in that: The inner wall of the mounting hole is provided with a second internal thread, and the outer peripheral wall of the shell is provided with a second external thread matching the second internal thread.

8. The buffer device according to claim 2, characterized in that: The base includes a main body and a movable part, one end of the movable part is connected to the main body, and the other end is loosely fitted with the main body, the movable part and the main body are arranged to form the mounting hole, and the buffer device also includes a fastener, which can drive the movable part to move toward or away from the main body to adjust the aperture of the mounting hole.

9. The buffer device according to claim 1, characterized in that: The buffer head is a flexible member.

10. A camera module testing mechanism, characterized in that: It comprises a driving component and a buffer device as described in any one of claims 1 to 9, wherein the driving component and the buffer device are arranged at an interval, and the driving component comprises a driver and a driving member connected to each other, and the driver can drive the driving member to move toward the buffer device so that the driving member abuts against the buffer head and pushes the buffer head.

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