Press fit mechanism and tool jig

Abstract

The utility model relates to a press-fit mechanism and a tool jig. The press-fit mechanism comprises a fixed seat, a sliding seat, a stop piece, an abutting lever and a driving piece. The sliding seat is installed on the fixed seat in a sliding mode, the stopping piece is arranged on the fixed seat along the sliding path of the sliding seat, and the abutting lever is installed on the sliding seat in a rotating mode and provided with a resistance end used for abutting against the hard board connector and a power end used for abutting against the stopping piece. The resistance end rotates relative to the sliding seat and is used for abutting against the hard board connector so that the hard board connector can be pressed on the test circuit board, the test circuit board is fixedly connected to the fixing seat, and the driving part is in driving connection with the sliding seat so as to drive the abutting lever to slide in actual use. The resistance end rotates relative to the sliding seat and abuts against the hard board connector so that the hard board connector can be pressed on the test circuit board, and the problem that a large-size lens interferes with a moving path of a cover plate of a tool jig in an assembly test of an existing camera module is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of camera assembly and testing, in particular to a pressing mechanism and a tooling fixture. Background Art

[0002] During the hardware production process of electronic equipment, assembly testing is required to verify whether the hardware units can work according to the design requirements. This is conducive to discovering problems in advance, reducing product defect rates and rework, and thus improving production efficiency. For example, during the assembly test of the camera module, the hard board connector of the camera module needs to be pressed onto the test circuit board of the tooling fixture through a cover plate and fixed with a fixture.

[0003] Usually, the lens size of the camera module is small, and the hard board connector has multiple pressing feet protruding from the edge of the lens, and a clearance hole is opened in the middle of the cover plate for the lens to pass through. The cover plate is directly pressed against the multiple pressing feet to press the hard board connector. After pressing and testing, the cover plate is flipped over and the camera module is taken out. If the lens size of the camera is larger than the size of the hard board connector, that is, the pressing feet are blocked by the lens, when the cover plate is pressed against the hard board connector, if the lens needs to be further assembled to the hard board connector, the cover plate cannot be taken out. Therefore, conventional cover plates cannot be used for assembly testing of such cameras. Utility Model Content

[0004] Since the existing lens size is larger than the size of the hard board connector, the lens of the camera module will interfere with the cover of the tooling fixture during assembly testing. It is necessary to provide a pressing mechanism and a tooling fixture.

[0005] A pressing mechanism for pressing a hard board connector of a camera module onto a test circuit board of a tooling fixture, comprising:

[0006] Fixed seat;

[0007] A sliding seat, the sliding seat being slidably mounted on the fixed seat;

[0008] A pressing lever, the pressing lever is rotatably mounted on the sliding seat and has a power end and a resistance end for pressing the hard board connector;

[0009] a stopper, which is disposed on the fixing seat along the sliding path of the pressing lever and is used to press the power end; and

[0010] A driving member is driven and connected to the sliding seat to drive the pressing lever to slide. When the power end presses against the stopper, the resistance end rotates relative to the sliding seat and is used to press the hard board connector so that the hard board connector is pressed onto the test circuit board.

[0011] In this way, the driving member provides sliding power for the sliding seat and the pressing lever, and by providing a stop member in the sliding path of the pressing lever, the pressing lever is forced to rotate while sliding, thereby changing the movement trajectory of the resistance end of the pressing lever, thereby achieving pressure on the hard board connector, so that the movement path of the pressing lever avoids the lens during the entire pressing process, thereby solving the technical problem of large-size lenses interfering with the movement path of the cover plate of the tooling fixture in the existing assembly test of the camera module.

[0012] In one embodiment, the pressing lever includes a rotating portion rotatably connected to the sliding seat and providing the power end, and a pressing portion extending from the rotating portion away from the sliding seat along the sliding direction of the sliding seat and providing the resistance end.

[0013] With such arrangement, the angle formed by the pressing portion and the connecting portion is used to make room for the edge of the hard board connector, so that the pressing lever can press to the side of the hard board connector away from the fixing seat, thereby ensuring the stability of the pressing.

[0014] In one embodiment, the thickness of the pressing portion gradually decreases from one end of the pressing portion connected to the rotating portion toward the resistance end.

[0015] This arrangement further avoids possible interference of the lens with the moving path of the resistance end.

[0016] In one embodiment, the pressing mechanism further includes a first elastic member with two ends respectively abutting against the sliding seat and the power end.

[0017] With such arrangement, when the pressing lever is not pressed by the stopper, the power end of the pressing lever always maintains a distance from the sliding seat, and the pressing lever remains in an open state when not used to press the hard board connector, thereby avoiding obstruction to the taking and placing of the hard board connector, and also preventing the pressing part from accidentally touching the side wall of the hard board connector and causing the hard board connector to be dislocated. In addition, after assembly and testing are completed, when the cover is flipped over, the pressing lever can automatically rotate under the action of the first elastic member, thereby releasing the hard board connector and facilitating the removal of the camera module.

[0018] In one embodiment, the fixed seat has an installation channel extending along the sliding direction of the sliding seat, and the stop member includes a second elastic member arranged in the installation channel and a push block arranged at the channel opening of the installation channel, and the two opposite sides of the push block are used to abut against the second elastic member and the power end respectively.

[0019] With such arrangement, when the pressing part of the pressing lever presses against the hard board connector, the displacement caused by the further sliding of the sliding seat is converted into the compression of the second elastic member, and the phenomenon that the sliding seat cannot move after the pressing part and the hard board connector are pressed together will not occur. There is no need to accurately calculate the sliding distance of the sliding seat, thus eliminating the problem of loose pressing or pressing deformation caused by the lack of pressing pressure or excessive pressing pressure between the pressing part and the hard board connector due to the assembly error of the sliding seat.

[0020] In one embodiment, the pressing lever has a first pressing position that cooperates with the first elastic member and a second pressing position that cooperates with the second elastic member, and the distance between the first pressing position and the rotation center of the pressing lever is smaller than the distance between the second pressing position and the rotation center of the pressing lever.

[0021] With such arrangement, the second elastic member and the first elastic member can use the same spring, which simplifies the types of parts and ensures that under the condition of the same spring types, the extrusion force generated by the deformation of the second elastic member can push the pressing lever to rotate.

[0022] In one embodiment, the sliding seat includes a seat body having a clearance groove and an axle body located in the clearance groove and fixedly connected to the seat body, and the pressing lever is rotatably sleeved on the axle body.

[0023] With such arrangement, since the shaft body is located in the clearance groove, the pressing lever is stopped by the edge of the clearance groove when rotating, thereby limiting the rotation angle of the pressing lever and preventing the pressing lever from rotating excessively.

[0024] In one embodiment, there are at least two pressing levers which are spaced apart from each other on the shaft.

[0025] Such an arrangement is helpful to improve the position stability of the hard board connector during the pressing process.

[0026] In one embodiment, the driving member includes a cover plate rotatably mounted on the fixed seat and a pressure block fixedly connected to the cover plate on a side facing the fixed seat, the pressure block has a driving direction perpendicular to the sliding direction of the sliding seat, the sliding seat has a guiding inclined surface gradually away from the stop member along the driving direction, and the pressure block is used to press the guiding inclined surface.

[0027] With this arrangement, the cover is rotated to drive the pressing block to press against the guiding slope of the sliding seat, and the pressing lever and the stopper are used to guide the pressure applied to the cover to the hard board connector. After assembly and testing are completed, the cover can be flipped without being blocked by the lens.

[0028] The present application also provides a tooling fixture, including:

[0029] A pressing mechanism as described above; and

[0030] A test circuit board is fixedly connected to a fixing seat of the pressing mechanism.

[0031] With this arrangement, the press fit between the hard board connector and the test circuit board is stable, and the two are not prone to relative displacement or separation, which improves the assembly quality and ensures the precision of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an existing camera module;

[0033] Figure 2 for Figure 1 A schematic diagram of a mid-rigid board connector;

[0034] Figure 3 A schematic diagram of the structure of a hardboard connector and a tooling fixture provided in the present application;

[0035] Figure 4 A schematic diagram of the structure of a camera module and a tooling fixture provided in this application;

[0036] Figure 5 for Figure 4 A cross-sectional view of the tooling fixture shown;

[0037] Figure 6 for Figure 3 A schematic diagram of the structure when the middle pressing mechanism does not press against the hard board connector;

[0038] Figure 7 for Figure 3 Schematic diagram of the structure when the middle pressing mechanism presses against the hard board connector.

[0039] Reference numerals:

[0040] 1P, lens; 2P, hard board connector; 21P, press-fit foot; 10, fixed seat; 20, sliding seat; 201, sliding direction; 202, give way groove; 203, guide slope; 204, first limit end; 205, second limit end; 21, seat body; 22, shaft body; 30, stop member; 31, second elastic member; 32, push block; 40, pressing lever; 401, power end; 402, resistance end; 403, first pressing position; 404, second pressing position; 41, rotating part; 42, press-fit part; 50, driving member; 501, driving direction; 51, cover plate; 52, pressing block; 60, first elastic member; 70, locking member; 200, tooling fixture; 2001, test circuit board. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0047] In the hardware production process of electronic equipment, assembly testing is required to verify whether the hardware units can work according to the design requirements. This is conducive to discovering problems in advance, reducing product defect rates and rework, thereby improving production efficiency. Assembly testing is also required in the production of camera modules to ensure the consistency of the lens assembly and the photosensitive assembly, reduce assembly tolerances, and further improve the product quality of the camera module. The common assembly and testing process for camera modules is the AA process, which is also the active alignment process. When the equipment using this process assembles each component, the equipment will detect the semi-finished product being assembled, and actively align it according to the actual situation of the semi-finished product being assembled, and then assemble the next component in place. This active alignment technology can effectively reduce the assembly tolerance of the entire module, effectively improve the consistency of camera products, and also create possibilities for higher-level camera product packaging.

[0048] See also Figures 1 to 4 , Figure 1 It is a structural diagram of an existing camera module. Figure 2 for Figure 1 Schematic diagram of the 2P mid-rigid board connector. Figure 3 It is a structural schematic diagram of a hard board connector 2P and a tooling fixture 200 provided in the present application, Figure 4The present invention is a structural schematic diagram of a camera module and a jig 200 provided in the present application. The existing assembly test of the camera module requires the hardboard connector 2P of the camera module to be pressed and fixed to the test circuit board 2001 of the jig 200 through the cover plate 51. Usually, the size of the lens 1P of the camera module is small, and the hardboard connector 2P has a plurality of pressing feet 21P protruding from the edge of the lens 1P, and a clearance hole is opened in the middle of the cover plate 51 for the lens 1P to pass through. The cover plate 51 directly presses against the plurality of pressing feet 21P to press the hardboard connector 2P. After the pressing and testing are completed, the cover plate 51 is turned over to take out the camera module. If the size of the camera lens 1P is larger than the size of the hardboard connector 2P, that is, the pressing feet are blocked by the lens 1P, after the cover plate 51 presses against the hardboard connector 2P, if the lens 1P needs to be further assembled to the hardboard connector 2P, the cover plate 51 cannot be taken out, so only conventional cover plates can not be used for the assembly test of this type of camera.

[0049] Based on this, it is necessary to provide a pressing mechanism and a jig 200 that can ignore the interference of the size of the lens 1P in the camera module on the moving path of the cover 51 of the assembly test. The jig 200 is not only suitable for camera module assembly testing, but also for assembly testing of all module components that need to be connected to the jig through the bottom hard board connector 2P.

[0050] See also Figures 3 to 7 , Figure 5 for Figure 4 The cross-sectional view of the tooling fixture 200 is shown. Figure 6 for Figure 3 Schematic diagram of the structure when the middle pressing mechanism does not press the hard board connector 2P. Figure 7 for Figure 3The structural diagram of the pressing mechanism pressing the hard board connector 2P. The tooling fixture 200 provided in the present application comprises a pressing mechanism and a test circuit board 2001. Specifically, the pressing mechanism comprises a fixed seat 10, a sliding seat 20, a stopper 30, a pressing lever 40 and a driving member 50. The sliding seat 20 can be slidably installed on the fixed seat 10, the stopper 30 is arranged on one side of the sliding seat 20 along the sliding direction of the sliding seat 20 and is fixed to the fixed seat 10, the pressing lever 40 can be rotatably installed on the sliding seat 20 and has a resistance end 402 for pressing the hard board connector 2P and a power end 401 for pressing the stopper 30, the resistance end 402 rotates relative to the sliding seat 20 and is used to press the hard board connector 2P so that the hard board connector 2P is pressed onto the test circuit board 2001, the test circuit board 2001 is fixedly connected to the fixed seat 10, the driving member 50 is drivingly connected to the sliding seat 20 to drive the pressing lever 40 to slide, in actual use, when the power end 401 presses against the stopper 30, the resistance end 402 rotates relative to the sliding seat 20 and presses the hard board connector 2P so that the hard board connector 2P is pressed onto the test circuit board 2001. The pressing mechanism provided by the present application provides sliding power for the sliding seat 20 and the pressing lever 40 through the driving member 50, and forces the pressing lever 40 to rotate while sliding by setting a stopper 30 in the sliding path of the pressing lever 40, thereby changing the moving track of the resistance end 402 of the pressing lever 40. Specifically, when the power end 401 does not abut against the stopper 30, the moving track of the resistance end 402 is a straight line, and when the power end 401 abuts against the stopper 30, the moving track of the resistance end 402 is an arc, and when the resistance end 402 moves to the end of the arc, the resistance end 402 abuts against the hard board connector 2P, and when the lens 1P is assembled, the resistance end 402 can return along the original moving path. During the pressing process of the entire pressing mechanism, the moving trajectory of the resistance end 402 of the pressing lever 40 avoids the lens 1P, and the driving member 50 indirectly drives the pressing lever 40 to slide along the fixed seat 10 with the help of the sliding seat 20 without interfering with the lens 1P, thereby solving the technical problem of the large-sized lens 1P interfering with the moving path of the cover plate 51 of the tooling fixture in the assembly test of the existing camera module.

[0051] For further information, see Figure 3In one embodiment provided in the present application, the driving member 50 includes a cover plate 51 rotatably mounted on the fixed seat 10 and a pressing block 52 fixedly connected to the cover plate 51 on the side facing the fixed seat 10. The pressing block 52 has a driving direction 501 perpendicular to the sliding direction 201 of the sliding seat 20. The sliding seat 20 has a guiding inclined surface 203 gradually away from the stopper 30 along the driving direction 501. The pressing block 52 is used to press the guiding inclined surface 203. The pressing block 52 is driven to press against the guiding inclined surface 203 of the sliding seat 20 by rotating the cover plate 51, and the pressure applied to the cover plate 51 is guided to the hard board connector 2P in cooperation with the pressing lever 40 and the stopper 30. After assembly and testing are completed, the cover plate 51 will not be blocked by the lens 1P when it is turned over.

[0052] See also Figure 6 and Figure 7 Specifically, in one embodiment provided in the present application, the pressing lever 40 includes a rotating portion 41 and a pressing portion, the rotating portion 41 is rotatably connected to the sliding seat 20, the power end 401 is located at the rotating portion 41, the pressing portion 42 is fixedly connected to the rotating portion 41 and extends away from the sliding seat 20 along the sliding direction 201 of the sliding seat 20, and the resistance end 402 is located at the pressing portion 42. The angle formed by the pressing portion 42 and the rotating portion 41 is used to make way for the edge of the hard board connector 2P, so that the pressing lever 40 can press to the side of the hard board connector 2P away from the fixed seat 10, ensuring the stability of the pressing.

[0053] Furthermore, in order to further avoid the interference of the lens 1P with the moving path of the resistance end 402, the thickness of the pressing portion 42 gradually decreases from the end of the pressing portion 42 connected to the rotating portion 41 toward the resistance end 402. In other words, the side of the pressing portion 42 close to the resistance end 402 is more pointed, and the arc trajectory of the resistance end 402 when rotating will not overlap with the side of the lens 1P facing the hard board connector.

[0054] See also Figure 6 and Figure 7 Optionally, in an embodiment provided in the present application, the pressing mechanism further includes a first elastic member 60 whose two ends are respectively abutted against the sliding seat 20 and the power end 401. When the pressing lever 40 is not pressed by the stopper 30, the power end 401 of the pressing lever 40 is always spaced from the sliding seat 20, and the pressing lever 40 is kept open when not used to press the hard board connector 2P, so as to avoid obstruction to the placement and removal of the hard board connector 2P, and also prevent the pressing part 42 from accidentally touching the side wall of the hard board connector 2P, causing the hard board connector 2P to be displaced; in addition, after the assembly and testing are completed, while the cover 51 is flipped over, the pressing lever 40 can automatically rotate under the action of the first elastic member 60, without manual adjustment, so as to facilitate the removal of the camera module.

[0055] Furthermore, in order to buffer the pressing force of the pressing lever 40 on the hard board connector 2P and maintain the stability of the pressing between the pressing lever 40 and the hard board connector 2P, the fixed seat 10 has a mounting channel extending along the sliding direction 201 of the sliding seat 20, and the stopper 30 includes a second elastic member 31 disposed in the mounting channel and a push block 32 disposed at the channel opening of the mounting channel, and the two opposite sides of the push block 32 are respectively used to abut against the second elastic member 31 and the power end 401. In this way, when the pressing part 42 of the pressing lever 40 presses against the hard board connector 2P, the displacement generated by the further sliding of the sliding seat 20 is converted into the compression amount of the second elastic member 31, and the sliding seat 20 will not be unable to move after the pressing part 42 and the hard board connector 2P are pressed together, and there is no need to accurately calculate the sliding distance of the sliding seat 20, which eliminates the problem of loose pressing or pressing deformation caused by the pressing part 42 and the hard board connector 2P having no pressing force or excessive pressing force due to the assembly error of the sliding seat 20. In addition, when the assembly and testing are completed, while flipping the cover 51, under the action of the second elastic member 31, the second elastic member 31 can push the driving member 50 and the sliding seat 20 away from the hard board connector 2P, further facilitating the interference of the pressing lever 40 with the hard board connector 2P.

[0056] Further, in an embodiment provided by the present application, the pressing lever 40 has a first pressing position 403 that cooperates with the first elastic member 60 and a second pressing position 404 that cooperates with the second elastic member 31, and the distance between the first pressing position 403 and the rotation center of the pressing lever 40 is smaller than the distance between the second pressing position 404 and the rotation center of the pressing lever 40. In this way, the second elastic member 31 and the first elastic member 60 can use the same spring, which simplifies the types of parts and ensures that under the condition of the same type of springs, the extrusion force generated by the deformation of the second elastic member 31 can push the pressing lever 40 to rotate.

[0057] See also Figure 6Specifically, in one embodiment provided in the present application, the sliding seat 20 includes a seat body 21 having a clearance groove 202 and a shaft body 22 located in the clearance groove 202 and fixedly connected to the seat body 21, and the pressing lever 40 is rotatably sleeved on the shaft body 22, that is, the central axis of the shaft body 22 is the rotation center of the pressing lever 40. Since the shaft body 22 is located in the clearance groove 202, the pressing lever 40 is stopped by the edge of the clearance groove 202 when rotating, thereby limiting the rotation angle of the pressing lever 40 and preventing the pressing lever 40 from rotating excessively. Furthermore, the seat body 21 has a first limit end 204 and a second limit end 205 located at the edge of the yield groove 202. The first limit end 204 and the second limit end 205 are respectively used to stop the two sides of the fulcrum of the pressing lever 40. The first limit end 204 is used to prevent the resistance end 402 from being pressed against the hard board connector 2P and causing a large deformation. The second limit end 205 is used to prevent the power end 401 from being too far away from the sliding seat 20, causing the first elastic member 60 to slip out.

[0058] Please refer again Figure 3 Optionally, in an embodiment provided in the present application, there are at least two pressing levers 40 which are arranged at intervals on the shaft body 22. Specifically, there are two sliding seats 20 which are arranged opposite to the fixed seats 10, and there are four pressing levers 40 which are arranged opposite to each other on the two fixed seats 10. This is beneficial to improving the position stability of the hard plate connector during the pressing process.

[0059] Also, please refer again to Figure 3 Specifically, in an embodiment provided in the present application, the tooling fixture 200 also includes a locking piece 70 installed on the other side of the fixing seat 10, and the locking piece 70 is used to lock to the cover plate 51, and the hard board connector 2P is fixed by locking the cover plate 51, thereby reducing the shaking of the hard board connector 2P and ensuring the assembly quality and test stability.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A pressing mechanism for pressing a hard board connector of a camera module onto a test circuit board of a fixture, characterized in that: include: Fixed seat; A sliding seat, the sliding seat being slidably mounted on the fixed seat; A stopper, the stopper is arranged on one side of the sliding seat along the sliding direction of the sliding seat and is fixed to the fixed seat; A pressing lever, the pressing lever is rotatably mounted on the sliding seat and has a resistance end for pressing the hard board connector and a power end for pressing the stopper; as well as A driving member is driven and connected to the sliding seat to drive the pressing lever to slide. When the power end presses against the stopper, the resistance end rotates relative to the sliding seat and is used to press the hard board connector so that the hard board connector is pressed onto the test circuit board.

2. The pressing mechanism according to claim 1, characterized in that: The pressing lever comprises a rotating part rotatably connected to the sliding seat and providing the power end, and a pressing part extending from the rotating part away from the sliding seat along the sliding direction of the sliding seat and providing the resistance end.

3. The pressing mechanism according to claim 2, characterized in that: The thickness of the pressing portion gradually decreases from one end of the pressing portion connected to the rotating portion toward the resistance end.

4. The pressing mechanism according to claim 3, characterized in that: The pressing mechanism further includes a first elastic member with two ends respectively abutting against the sliding seat and the power end.

5. The pressing mechanism according to claim 4, characterized in that: The fixed seat has an installation channel extending along the sliding direction of the sliding seat. The stopper includes a second elastic member arranged in the installation channel and a push block arranged at the channel opening of the installation channel. The two opposite sides of the push block are respectively used to abut against the second elastic member and the power end.

6. The pressing mechanism according to claim 5, characterized in that: The pressing lever has a first pressing position that cooperates with the first elastic member and a second pressing position that cooperates with the second elastic member, and the distance between the first pressing position and the rotation center of the pressing lever is smaller than the distance between the second pressing position and the rotation center of the pressing lever.

7. The pressing mechanism according to any one of claims 1 to 6, characterized in that: The sliding seat comprises a seat body with a clearance groove and an axle body located in the clearance groove and fixedly connected to the seat body, and the pressing lever is rotatably sleeved on the axle body.

8. The pressing mechanism according to claim 7, characterized in that: There are at least two pressing levers which are spaced apart from each other on the shaft body.

9. The pressing mechanism according to claim 1, characterized in that: The driving member includes a cover plate rotatably mounted on the fixed seat and a pressing block fixedly connected to the cover plate on one side of the fixed seat, the pressing block having a driving direction perpendicular to the sliding direction of the sliding seat, the sliding seat having a guiding inclined surface gradually away from the stop member along the driving direction, and the pressing block being used to press the guiding inclined surface.

10. A tooling fixture, characterized in that: include: The pressing mechanism according to any one of claims 1 to 9; and A test circuit board is fixedly connected to a fixing seat of the pressing mechanism.

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