A CAM press-fitting fixture and press-fitting system

Abstract

This utility model discloses a CAM press-fitting fixture and press-fitting system. The CAM press-fitting fixture includes a base plate, a fixture body, a bushing positioning seat, a bushing, a limiting post, a guide shaft, a compression spring, a pressure block hanging plate, a spring rope, and a pressure block. The fixture body is mounted on the base plate and has a lens barrel mounting groove. The bushing positioning seat consists of a vertical plate and a horizontal plate, with the vertical plate mounted on the fixture body and the bushing mounted on the horizontal plate. The limiting post is a hollow tubular structure and is connected to the top of the bushing. The inner diameter of the limiting post is larger than that of the bushing, and the portion of the top of the bushing that exceeds the inner diameter of the limiting post forms a spring limiting platform. The guide shaft consists of a top plate and a vertical rod. The compression spring is sleeved around the vertical rod, which passes through the limiting post and the bushing in sequence and can slide up and down. The compression spring is located between the top plate and the spring limiting platform. The pressure block hanging plate is mounted on the vertical plate. One end of the spring rope is connected to the pressure block hanging plate, and the other end is connected to the pressure block. The bottom of the pressure block has a groove that matches the top plate. The above fixture reduces the scrap rate of CAM.

Description

Technical Field

[0001] This utility model relates to a CAM pressing fixture and pressing system, belonging to the field of CAM pressing technology on lens barrels. Background Technology

[0002] With continuous technological advancements and growing market demand, VR optical engines are evolving towards higher performance, lighter weight, and lower cost. In the future, with the continuous development of new display and optical technologies, VR optical engines are expected to achieve even better display effects and a more comfortable wearing experience.

[0003] VR optical engines equipped with CAM cameras typically refer to the integration of camera (CAM) functionality into virtual reality (VR) devices, enabling the capture and recording of real-world scenes within the VR environment. This technological configuration allows users to enjoy an immersive visual experience while simultaneously recording or sharing what they see in VR.

[0004] Currently, no complete assembly fixture in the industry can accurately and efficiently achieve high-yield CAM positioning. Current processes still rely on manual CAM assembly, which suffers from poor consistency, high scrap rates, and low precision. This invention effectively solves these problems and drawbacks of manual assembly. Utility Model Content

[0005] This utility model provides a CAM pressing fixture and pressing system for installing CAMs on the lens barrel of VR optical engine projects. It solves the problems of CAM damage caused by manual assembly and low test performance due to poor positioning accuracy of assembled CAMs during the lens barrel assembly process, and improves the consistency of CAM pressing.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A CAM press fixture includes a base plate, a fixture body, a bushing positioning seat, a bushing, a limiting post, a guide shaft, a compression spring, a pressure block hanging plate, a spring rope, and a pressure block;

[0008] The fixture body is mounted on the base plate. The fixture body is provided with a positioning slope, and the positioning slope is provided with a lens barrel mounting groove. The lens barrel mounting groove matches the bottom shape of the lens barrel to be installed.

[0009] The bushing positioning seat is a 7-shaped structure composed of vertical plates and horizontal plates. The bottom of the vertical plate is vertically installed on the fixture body, and the horizontal plate has mounting holes. The bushing is vertically installed on the mounting holes, that is, the axial direction of the bushing is consistent with the vertical direction.

[0010] The limiting post is a hollow tubular structure. The limiting post is connected to the top of the bushing and is concentric with the bushing (that is, the axes of the limiting post and the bushing coincide). The inner diameter of the limiting post is larger than the inner diameter of the bushing. The part of the top of the bushing that exceeds the inner diameter of the limiting post forms a spring limiting platform, which is used to support and limit the bottom of the compression spring.

[0011] The guide shaft consists of a top plate and a vertical rod. The vertical rod is vertically connected to the center of the bottom of the top plate, and the top plate and the vertical rod form a T-shaped structure. A compression spring is sleeved around the outside of the vertical rod. The vertical rod passes through the limiting post and the bushing from top to bottom and can slide up and down relative to the limiting post and the bushing. The compression spring is located between the top plate and the spring limiting platform. The outer diameter of the top plate is larger than the inner diameter of the limiting post, and the top plate stays above the limiting post. When no external force is applied to the top plate, the top of the vertical rod and the top of the compression spring both exceed (are higher than) the limiting post, and the bottom of the vertical rod points towards, but does not extend into, the lens barrel mounting groove.

[0012] The pressure block hanging plate is vertically installed on the side wall of the shaft sleeve positioning seat vertical plate; one end of the spring rope is connected to the top of the pressure block hanging plate and the other end is connected to the top of the pressure block; the bottom center of the pressure block has a groove that matches the top plate of the guide shaft. When the pressure block is moved to cover the top plate of the guide shaft through the bottom groove, the guide shaft moves downward under the gravity of the pressure block until the top plate is stuck above the limit post and the bottom of the vertical rod extends into the lens barrel mounting groove. The travel distance of the guide shaft (the distance the guide shaft travels after the pressure block is covered) is greater than or equal to the travel distance of the guide shaft required when pressing the CAM.

[0013] As is common knowledge, the lens barrel to be installed is provided with a CAM mounting slot for installing CAM.

[0014] The aforementioned fixture is used to batch complete the pressing of CAMs on the lens barrel, ensuring the consistency of force during the installation of each CAM, reducing scrap and improving accuracy.

[0015] The lengths of the vertical and horizontal plates on the aforementioned bushing positioning seat are determined according to the position of the CAM mounting groove on the lens barrel to be installed. The determination is based on the following: when the lens barrel to be installed is placed in the lens barrel mounting groove, the CAM mounting groove is on top, the bottom of the vertical rod on the guide shaft points to the CAM mounting groove, and under the gravity of the pressure block, the bottom of the vertical rod on the guide shaft can be pressed against the CAM in the CAM mounting groove.

[0016] In use, place the lens barrel to be installed in the lens barrel mounting slot, with the CAM mounting slot facing up. Place the CAM in the CAM mounting slot on the lens barrel, with the bottom of the guide shaft's vertical rod pointing towards the CAM. The pressure block is then moved to fit over the top plate of the guide shaft via its bottom groove. Under the weight of the pressure block, the guide shaft moves downwards until the bottom of the vertical rod presses against the CAM, ensuring the CAM is stably and evenly stressed and securely pressed into the CAM's inclined groove, completing the CAM installation. Then, remove the pressure block from the top plate of the guide shaft. Under the restoring force of the compression spring, the guide shaft automatically springs back, causing the bottom of the vertical rod to move away from the CAM. Remove the installed lens barrel and repeat the above steps until batch installation is complete.

[0017] The aforementioned base plate increases the contact area of ​​the fixture body, effectively preventing the fixture body of this patent from tipping over during use.

[0018] The inclined positioning surface on the fixture body is designed to facilitate the press-fitting of the CAM. The CAM mounting slot on the lens barrel is typically an inclined slot. When the lens barrel is tilted, the top of the CAM mounting slot becomes horizontal. Pressing the CAM until it no longer moves downwards is complete. The angle of the positioning inclined surface ensures that the top of the CAM mounting slot is horizontal when the lens barrel is placed within the mounting slot.

[0019] The aforementioned bushing is equipped with a limit post, and a compression spring is installed inside the limit post. The purpose is to provide effective guidance and improve stability, effectively control the pressing stroke distance of the guide shaft, ensure the accurate positioning of CAM, reduce scrap, and also allow the guide shaft to automatically reset after pressing, which is convenient, controllable, and easy to operate.

[0020] The elasticity of the aforementioned spring rope is much greater than the travel distance of the guide shaft, meaning that the installation of the spring rope will not affect the pressing process. Connecting the pressure block to the pressure block hanging plate via the spring rope not only prevents the pressure block from being lost but also improves safety, avoiding a series of safety problems caused by the pressure block falling.

[0021] The aforementioned CAM press-fitting fixture reduces the risk of human-caused damage to CAMs and improves the accuracy of CAM positioning.

[0022] The base plate can be bolted to the operating table to further ensure stability.

[0023] The aforementioned pressure block is preferably made of stainless steel, and its weight is determined according to the pressure required for pressing.

[0024] To further improve stability, the aforementioned CAM press-fit fixture also includes a fixing block. The fixing block is connected to the positioning ramp around the lens barrel mounting slot via axial bolts. The fixing block is rotatably fitted onto the shoulder of the axial bolt's shaft. The fixing block can rotate either above the lens barrel mounting slot (in which case part of its length is above the slot and part falls on the positioning ramp) or away from the slot (in which case it rests entirely on the positioning ramp without intersecting the slot). In other words, the fixing block can rotate freely relative to the axial bolt. During use, when the lens barrel to be installed is placed in the mounting slot, the fixing block can be rotated to press it against the periphery of the lens barrel, improving stability. The bottom shape of the fixing block matches the periphery of the lens barrel to be installed.

[0025] As is common knowledge, axial bolts have a smooth shoulder (non-threaded section) in the middle of the bolt.

[0026] As one preferred implementation, there are two fixing blocks, and the two fixing blocks are arranged opposite each other on both sides of the lens barrel mounting groove.

[0027] To improve practical stability and controllability, the top of the compression spring is connected to the top plate of the guide shaft, and the bottom of the compression spring is connected to the spring limiting platform. When the compression spring is in a free state, both the top of the vertical rod and the top of the compression spring extend beyond the limiting post, and the bottom of the vertical rod points towards, but does not extend into, the lens barrel mounting groove. When the pressure block is movably covered on the top plate of the guide shaft through the bottom groove, under the action of the pressure block's gravity, the guide shaft moves downward until the top plate is locked above the limiting post, and the bottom of the vertical rod fits against the lower surface of the CAM and the upper surface of the lens barrel CAM mounting groove.

[0028] To facilitate assembly and ensure the stability of the fixture, the fixture body is mounted on the base plate with stainless steel bolts; the vertical plate of the bushing positioning seat is mounted on the fixture body with stainless steel bolts; and the pressure block hanging plate is mounted on the side wall of the vertical plate of the bushing positioning seat with stainless steel bolts.

[0029] As one specific implementation scheme, the vertical plate and the horizontal plate on the bushing positioning seat are an integral structure. In this case, the horizontal plate is set horizontally, and the horizontal plate is also set vertically on the top of the vertical plate, forming a structure similar to the number 7.

[0030] As another specific implementation, the horizontal plate on the bushing positioning seat is vertically connected to the top of the vertical plate, the horizontal plate is horizontally positioned, and its length is adjustable. And / or the vertical plate on the bushing positioning seat is also of adjustable length. This improves the flexibility of the fixture's use.

[0031] The aforementioned length-adjustable structure can be any existing mature length-adjustable structure, such as a length-adjustable structure like a selfie stick, or a double-sleeve structure (the outer sleeve is fitted over the inner sleeve, the inner sleeve can slide relative to the outer sleeve, and the inner and outer sleeves can be relatively fixed by bolts passing through both the inner and outer sleeves), or other existing mature structures.

[0032] For ease of use, as one specific implementation scheme, the top of the pressure block hanging plate is provided with a first connecting ring, the center of the top of the pressure block is provided with a second connecting ring, and both ends of the spring rope are provided with ring buckles, which are connected to the first connecting ring and the second connecting ring respectively.

[0033] To further improve practical stability, a retaining block is provided on the positioning bevel next to the lens barrel mounting slot. The retaining block has a groove on the side facing the lens barrel mounting slot that matches the periphery of the lens barrel to be installed. When the bottom of the lens barrel to be installed is placed in the lens barrel mounting slot, the periphery of the lens barrel is engaged within the groove of the retaining block. Multiple retaining blocks can be provided, but their distribution range should not exceed half the circumference of the lens barrel mounting slot to avoid affecting the lens barrel installation.

[0034] A CAM press-fitting system includes the aforementioned CAM press-fitting fixture, a lens barrel to be installed, and a CAM. The side wall of the lens barrel to be installed is provided with a CAM mounting groove, the bottom of the lens barrel to be installed is located in the lens barrel mounting groove, the CAM is located in the CAM mounting groove, and the bottom of the vertical rod on the guide shaft points to the CAM. When the pressing block is movably covered on the top plate of the guide shaft through the groove at its bottom, the guide shaft moves downward under the action of gravity until the bottom of the vertical rod presses against the upper surface of the CAM.

[0035] Any technologies not mentioned in this utility model are based on existing technologies.

[0036] This utility model CAM press-fitting fixture solves the problems of human-caused damage to CAMs and poor positioning accuracy leading to low testing performance during the current CAM assembly process. In the production process, it improves production efficiency and reduces production time. In terms of assembly technology, it avoids the risk of human-caused damage to CAMs. In terms of quality, it improves production yield. Moreover, it has a simple structure, is easy to operate and control, and is easy to promote. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the CAM press-fitting system of this utility model (press-fitting state);

[0038] Figure 2 This is a cross-sectional view (pressing state) of the CAM press-fitting system of this utility model;

[0039] Figure 3 This is a model of the CAM pressing system of this utility model. Figure 1 ;

[0040] Figure 4 This is a model of the CAM pressing system of this utility model. Figure 2 ;

[0041] In the figure, 1 is the base plate, 2 is the fixture body, 201 is the positioning slope, 202 is the lens barrel mounting groove, 203 is the fixing block, 204 is the slot block, 3 is the bushing positioning seat, 4 is the bushing, 5 is the limiting post, 6 is the guide shaft, 601 is the top plate, 602 is the vertical rod, 7 is the compression spring, 8 is the pressure block hanging plate, 9 is the spring rope, 10 is the pressure block, 11 is the lens barrel to be installed, and 112 is the CAM mounting groove. Detailed Implementation

[0042] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.

[0043] The directional terms used in this application, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," are based on the orientation or positional relationship shown in the accompanying drawings or in the usage state, and are only for the convenience of describing this application. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0044] Example 1

[0045] like Figure 1-4 As shown, a CAM press fixture includes a base plate, a fixture body, a bushing positioning seat, a bushing, a limiting post, a guide shaft, a compression spring, a pressure block hanging plate, a spring rope, and a pressure block;

[0046] The fixture body is mounted on the base plate. The fixture body is provided with a positioning slope, and the positioning slope is provided with a lens barrel mounting groove. The lens barrel mounting groove matches the bottom shape of the lens barrel to be installed.

[0047] The bushing positioning seat is a 7-shaped structure composed of vertical plates and horizontal plates. The bottom of the vertical plate is vertically installed on the fixture body, and the horizontal plate has mounting holes. The bushing is vertically installed on the mounting holes, that is, the axial direction of the bushing is consistent with the vertical direction.

[0048] The limiting post is a hollow tubular structure. The limiting post is connected to the top of the bushing and is concentric with the bushing (that is, the axes of the limiting post and the bushing coincide). The inner diameter of the limiting post is larger than the inner diameter of the bushing. The part of the top of the bushing that exceeds the inner diameter of the limiting post forms a spring limiting platform.

[0049] The guide shaft consists of a top plate and a vertical rod. The vertical rod is vertically connected to the center of the bottom of the top plate, and the top plate and the vertical rod form a T-shaped structure. A compression spring is sleeved around the outside of the vertical rod. The vertical rod passes through the limiting post and the bushing from top to bottom and can slide up and down relative to the limiting post and the bushing. The compression spring is located between the top plate and the spring limiting platform. The outer diameter of the top plate is larger than the inner diameter of the limiting post, and the top plate stays above the limiting post. When no external force is applied to the top plate, the top of the vertical rod and the top of the compression spring both extend beyond the limiting post, and the bottom of the vertical rod points towards, but does not extend into, the lens barrel mounting groove.

[0050] The pressure block hanging plate is vertically installed on the side wall of the shaft sleeve positioning seat vertical plate; one end of the spring rope is connected to the top of the pressure block hanging plate and the other end is connected to the top of the pressure block; the bottom center of the pressure block has a groove that matches the top plate of the guide shaft. When the pressure block is moved to cover the top plate of the guide shaft through the bottom groove, the guide shaft moves downward under the gravity of the pressure block until the top plate is stuck above the limit post and the bottom of the vertical rod extends into the lens barrel mounting groove. The travel distance of the guide shaft (the distance the guide shaft travels after the pressure block is covered) is greater than or equal to the travel distance of the guide shaft when pressing the CAM.

[0051] The aforementioned fixture is used to batch-assemble CAMs on the lens barrel, ensuring consistent force distribution during installation of each CAM, reducing scrap, and improving accuracy. The lengths of the vertical and horizontal plates on the aforementioned bushing positioning seat are determined based on the position of the CAM mounting slot on the lens barrel to be installed. The determination is based on the following: when the lens barrel to be installed is placed in the lens barrel mounting slot, the bottom of the vertical rod on the guide shaft points towards the CAM mounting slot, and under the gravity of the pressure block, the bottom of the vertical rod on the guide shaft can be pressed against the CAM in the CAM mounting slot.

[0052] In use, place the lens barrel to be installed in the lens barrel mounting slot, with the CAM mounting slot facing up. Place the CAM in the CAM mounting slot on the lens barrel, with the bottom of the guide shaft's vertical rod pointing towards the CAM. The pressure block is then moved to fit over the top plate of the guide shaft via its bottom groove. Under the weight of the pressure block, the guide shaft moves downwards until the bottom of the vertical rod presses against the CAM, ensuring the CAM is stably and evenly stressed and securely pressed into the CAM's inclined groove, completing the CAM installation. Then, remove the pressure block from the top plate of the guide shaft. Under the restoring force of the compression spring, the guide shaft automatically springs back, causing the bottom of the vertical rod to move away from the CAM. Remove the installed lens barrel and repeat the above steps until batch installation is complete.

[0053] The aforementioned base plate increases the contact area of ​​the fixture body, effectively preventing it from tipping over during use. The inclined positioning surface on the fixture body facilitates CAM pressing. The CAM mounting slot on the lens barrel is typically an inclined slot. When the lens barrel is tilted, the top of the CAM mounting slot becomes horizontal. Pressing the CAM until it stops moving downwards completes the pressing process. The angle of the positioning surface ensures that the top of the CAM mounting slot is horizontal when the lens barrel is placed in the mounting slot. The aforementioned bushing is equipped with a limit post, and a compression spring is installed within the limit post. This serves to effectively guide the movement of the guide shaft, improving stability, and effectively control the pressing distance, ensuring precise CAM positioning and reducing waste. Furthermore, it allows the guide shaft to automatically reset after pressing, making it convenient, controllable, and easy to operate. The elasticity of the spring rope is much greater than the travel distance of the guide shaft, meaning the spring rope will not affect the pressing process. By connecting the pressure block to the pressure block hanging plate via a spring rope, the loss of the pressure block is prevented, and safety is improved, avoiding a series of safety problems caused by the pressure block falling. The aforementioned CAM pressing fixture reduces the risk of human-caused damage to the CAM and improves the accuracy of CAM positioning.

[0054] Example 2

[0055] Based on Example 1, the following improvements were made: the base plate was mounted on the operating table with bolts to further ensure stability.

[0056] Example 3

[0057] Based on Example 1 or 2, the following improvements were made: the pressure block is made of stainless steel. For example... Figure 1 As shown, to further improve stability, the CAM press-fit fixture also includes fixing blocks positioned opposite each other on both sides of the lens barrel mounting slot. Each fixing block is connected to a positioning ramp next to the lens barrel mounting slot via axial bolts. The fixing blocks are rotatably fitted onto the shoulder of the axial bolt's shaft. The fixing blocks can rotate either above the lens barrel mounting slot (in which case part of the fixing block's length is above the lens barrel mounting slot, and part of its length falls on the positioning ramp) or away from the lens barrel mounting slot (in which case the fixing block falls completely on the positioning ramp and does not intersect with the lens barrel mounting slot). In other words, the fixing blocks can rotate freely relative to the axial bolts. During use, when the lens barrel to be installed is placed in the lens barrel mounting slot, the fixing blocks can be rotated to press them against the periphery of the lens barrel to be installed, thereby improving stability. The bottom shape of the fixing blocks matches the periphery of the lens barrel to be installed.

[0058] Example 4

[0059] Based on Example 3, the following improvements were made: To improve practical stability and controllability, the top of the compression spring is connected to the top plate of the guide shaft, and the bottom of the compression spring is connected to the spring limiting platform. When the compression spring is in a free state, both the top of the vertical rod and the top of the compression spring extend beyond the limiting post, and the bottom of the vertical rod points towards, but does not extend into, the lens barrel mounting slot. When the CAM needs to be press-fitted, the lens barrel to be installed is placed in the lens barrel mounting slot with the CAM mounting slot on top. The CAM is then placed in the CAM mounting slot on the lens barrel, with the bottom of the guide shaft pointing towards the CAM. When the pressure block is movably covered on the top plate of the guide shaft through the bottom groove, the guide shaft moves downward until the bottom of the vertical rod presses against the CAM.

[0060] Example 5

[0061] Based on Example 4, the following improvements were made: Figure 2 As shown, to facilitate assembly and ensure the stability of the fixture, the fixture body is mounted on the base plate with stainless steel bolts; the vertical plate on the bushing positioning seat is mounted on the fixture body with stainless steel bolts; and the pressure block hanging plate is mounted on the side wall of the vertical plate on the bushing positioning seat with stainless steel bolts.

[0062] Example 6

[0063] Based on Example 5, the following improvements were further made: Figure 1-2 As shown, the vertical plate and horizontal plate on the bushing positioning seat are an integral structure.

[0064] Example 7

[0065] Based on embodiment 5 or 6, the following improvements were made: the horizontal plate on the bushing positioning seat is vertically connected to the top of the vertical plate, and both the horizontal and vertical plates are length-adjustable structures. This improves the flexibility of the fixture.

[0066] Example 8

[0067] Based on Example 6 or 7, the following improvements were further made: Figure 1-2 As shown, the top of the pressure block hanging plate is provided with a first connecting ring, and the center of the top of the pressure block is provided with a second connecting ring. Both ends of the spring rope are provided with ring buckles, and the ring buckles at both ends of the spring rope are connected to the first connecting ring and the second connecting ring respectively.

[0068] Example 9

[0069] Based on Example 8, the following improvements were made: Figure 1-2As shown, to further improve practical stability, a retaining block is provided on the positioning slope next to the lens barrel mounting slot. The retaining block has a groove on the side facing the lens barrel mounting slot that matches the periphery of the lens barrel to be installed. When the bottom of the lens barrel to be installed is placed in the lens barrel mounting slot, the periphery of the lens barrel is engaged in the groove of the retaining block. Multiple retaining blocks can be provided, but their distribution range should not exceed half the circumference of the lens barrel mounting slot to avoid affecting the lens barrel installation. All structural components on the fixture are manufactured using a machining center (CNC). The outer diameter tolerance of the guide shaft is controlled within (0 to +0.02 mm), and the clearance between the bushing and the bushing positioning seat is controlled within (0 to +0.02 mm). The bushing must be a precision bushing supplied by MISUMI or SKF.

[0070] A CAM press-fitting system includes the aforementioned CAM press-fitting fixture, a lens barrel to be installed, and a CAM; the side wall of the lens barrel to be installed is provided with a CAM mounting groove, the bottom of the lens barrel to be installed is located in the lens barrel mounting groove, the CAM is located in the CAM mounting groove, the bottom of the vertical rod on the guide shaft points to the CAM, when the pressing block is movably covered on the top plate of the guide shaft through the bottom groove, under the action of gravity, the guide shaft moves downward until the bottom of the vertical rod presses on the CAM.

[0071] The CAM press-fit fixtures described above solve the problems of human-caused damage to CAMs and poor CAM positioning accuracy leading to low test performance during the current CAM assembly process. In the production process, they improve production efficiency and reduce production time. In terms of assembly technology, they avoid the risk of human-caused damage to CAMs. In terms of quality, they improve production yield. Moreover, they have a simple structure, are easy to operate and control, and are easy to promote.

Claims

1. A CAM press-fitting fixture, characterized in that: Includes base plate (1), fixture body (2), bushing (4), positioning seat (3), bushing (4), limiting post (5), guide shaft (6), compression spring (7), pressure block (10), hanging plate (8), spring rope (9) and pressure block (10); The fixture body (2) is mounted on the base plate (1). The fixture body (2) is provided with a positioning slope (201). The positioning slope (201) is provided with a lens barrel mounting groove (202). The lens barrel mounting groove (202) matches the bottom shape of the lens barrel (11) to be installed. The bushing (4) positioning seat (3) is a 7-shaped structure spliced ​​from a vertical plate and a horizontal plate. The bottom of the vertical plate is vertically installed on the fixture body (2), and the horizontal plate is provided with mounting holes. The bushing (4) is vertically installed on the mounting holes. The limiting post (5) is a hollow tubular structure. The limiting post (5) is connected to the top of the bushing (4) and is concentric with the bushing (4). The inner diameter of the limiting post (5) is larger than the inner diameter of the bushing (4). The part of the top of the bushing (4) that exceeds the inner diameter of the limiting post (5) forms a spring limiting platform. The guide shaft (6) consists of a top plate (601) and a vertical rod (602). The vertical rod (602) is vertically connected to the center of the bottom of the top plate (601). A compression spring (7) is sleeved around the vertical rod (602). The vertical rod (602) passes through the limiting post (5) and the bushing (4) from top to bottom and can slide up and down relative to the limiting post (5) and the bushing (4). The compression spring (7) is located between the top plate (601) and the spring limiting platform. The outer diameter of the top plate (601) is larger than the inner diameter of the limiting post (5) and stays above the limiting post (5). When no external force is applied to the top plate (601), the top of the vertical rod (602) and the top of the compression spring (7) both extend beyond the limiting post (5). The bottom of the vertical rod (602) points to, but does not extend into, the lens barrel mounting groove (202). The pressure block (10) and the hanging plate (8) are vertically installed on the side wall of the vertical plate of the positioning seat (3) of the bushing (4); one end of the spring rope (9) is connected to the top of the pressure block (10) and the other end is connected to the top of the pressure block (10); the bottom center of the pressure block (10) is provided with a groove that matches the top plate (601) of the guide shaft (6). When the pressure block (10) is moved to cover the top plate (601) of the guide shaft (6) through the groove at the bottom, the guide shaft (6) moves downward under the gravity of the pressure block (10) until the top plate (601) is stuck above the limiting post (5) and the bottom of the vertical rod (602) extends into the lens barrel mounting groove (202).

2. The CAM press-fitting fixture according to claim 1, characterized in that: It also includes a fixing block (203), which is connected to the positioning slope (201) around the lens barrel mounting groove (202) by a shaft bolt. The fixing block (203) is rotatably sleeved on the shoulder of the shaft bolt. The fixing block (203) can be rotated to the top of the lens barrel mounting groove (202) or to the side away from the lens barrel mounting groove (202).

3. The CAM press-fitting fixture according to claim 2, characterized in that: There are two fixing blocks (203), which are arranged opposite each other on both sides of the lens barrel mounting groove (202).

4. The CAM press-fitting fixture according to any one of claims 1-3, characterized in that: The top of the compression spring (7) is connected to the top plate (601) of the guide shaft (6), and the bottom is connected to the spring limiting platform.

5. The CAM press-fitting fixture according to any one of claims 1-3, characterized in that: The fixture body (2) is mounted on the base plate (1) by stainless steel bolts; the vertical plate on the positioning seat is mounted on the fixture body (2) by stainless steel bolts; the pressure block (10) and hanging plate (8) are mounted on the side wall of the vertical plate of the bushing (4) and positioning seat (3) by stainless steel bolts.

6. The CAM press-fitting fixture according to any one of claims 1-3, characterized in that: The bushing (4), the positioning seat (3), and the upper vertical plate and horizontal plate are an integral structure.

7. The CAM press-fitting fixture according to any one of claims 1-3, characterized in that: The horizontal plate on the bushing (4) positioning seat (3) is vertically connected to the top of the vertical plate; the horizontal plate is a length-adjustable structure, and / or the vertical plate is a length-adjustable structure.

8. The CAM press-fitting fixture according to any one of claims 1-3, characterized in that: The top of the pressure block (10) and the hanging plate (8) is provided with a first connecting ring, and the center of the top of the pressure block (10) is provided with a second connecting ring. Both ends of the spring rope (9) are provided with ring buckles, and the ring buckles at both ends of the spring rope (9) are respectively connected to the first connecting ring and the second connecting ring.

9. The CAM press-fitting fixture according to any one of claims 1-3, characterized in that: A slot block (204) is provided on the positioning slope (201) next to the lens barrel mounting groove (202), and the slot block (204) has a slot on the side facing the lens barrel mounting groove (202).

10. A CAM pressing system, characterized in that: Includes the CAM press-fit fixture as described in any one of claims 1-9, the lens barrel (11) to be installed, and the CAM; the side wall of the lens barrel (11) to be installed is provided with a CAM mounting groove (112), the bottom of the lens barrel (11) to be installed is located in the lens barrel mounting groove (202), the CAM is located in the CAM mounting groove (112), the bottom of the vertical rod (602) on the guide shaft (6) points to the CAM, when the pressing block (10) is movably covered on the top plate (601) of the guide shaft (6) through the bottom groove, under the action of gravity, the guide shaft (6) moves downward until the bottom of the vertical rod (602) presses on the CAM.

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