Positioning device for testing

Abstract

The invention relates to a positioning device for testing. The positioning device comprises a bottom plate; the supporting assembly comprises a mounting plate and a circuit board, the mounting plate is connected with the bottom plate, and the circuit board is located on the mounting plate; the test assembly comprises a mounting seat and a test piece, the mounting seat is connected with the mounting plate, the circuit board is clamped between the mounting seat and the mounting plate, the test piece is clamped with the mounting seat, and one end of the test piece abuts against the circuit board; the positioning assembly comprises a connecting base, a first elastic piece, a movable plate, a cover plate, a first positioning piece and a second positioning piece, the connecting base is connected with the bottom plate, the movable plate is slidably connected with the connecting base, the first elastic piece is located between the movable plate and the bottom plate, the cover plate is hinged to the movable plate and can move towards the mounting base, and the first positioning piece is hinged to the cover plate; the second positioning piece is connected with the bottom plate, and the first positioning piece can be connected with the second positioning piece in a clamped mode. According to the positioning device for testing, the precision of alignment of the camera and the test piece during testing can be improved.

Description

A positioning device for testing Technical Field

[0001] This invention relates to the field of positioning device technology, and in particular to a positioning device for testing. Background Technology

[0002] With the rapid development of technologies such as intelligent security, autonomous driving, and video conferencing, cameras, as core sensing devices, directly impact the reliability and security of the system due to their performance and quality. After camera production, testing is required, currently achieved by having probes contact the camera. However, this testing involves using a flip-top positioning device. Because some cameras are small, the positioning groove is shallow. During the rotation of the cover, the cover initially contacts one side of the camera, causing the camera to easily shift or disengage from the positioning groove, resulting in inaccurate alignment between the camera and the probe. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a positioning device for testing that can improve the accuracy of the alignment between the camera and the test piece during testing.

[0004] To solve the above-mentioned technical problems, the present invention provides a positioning device for testing, comprising: a base plate; a support assembly including a mounting plate and a circuit board, wherein the mounting plate is connected to the base plate and the circuit board is located on the mounting plate; a testing assembly including a mounting base and a test piece, wherein the mounting base is connected to the mounting plate, the circuit board is clamped between the mounting base and the mounting plate, the test piece is snapped into the mounting base, and one end of the test piece abuts against the circuit board; and a positioning assembly including a connecting base, a first elastic element, a movable plate, a cover plate, a first positioning element, and a second positioning element, wherein the connecting base is connected to the base plate, the movable plate is slidably connected to the connecting base, the first elastic element is located between the movable plate and the base plate, the cover plate is hinged to the movable plate and is movable toward the mounting base, the first positioning element is hinged to the cover plate, and the second positioning element is connected to the base plate and is snapped into the second positioning element.

[0005] In one embodiment of the present invention, the positioning component further includes a slide rail, a slider, and a limiting plate. The slide rail is connected to the connecting seat, the slider is slidably connected to the slide rail, the movable plate is connected to the slider, the limiting plate is connected to the end of the connecting seat away from the base plate, and the slider can abut against the limiting plate.

[0006] In one embodiment of the present invention, a stop is provided on the side of the movable plate near the first positioning member, and the stop is located on the rotation path of the cover plate.

[0007] In one embodiment of the present invention, the mounting base includes a fixing block and a mounting block. The fixing block is connected to the mounting plate. The fixing block is provided with a mounting groove. The mounting block includes a connecting part, a first boss and a mounting hole. The connecting part is located in the mounting groove and connected to the bottom of the mounting groove. The mounting hole passes through the mounting block. One end of the mounting hole is located at the top of the first boss. The test piece passes through the mounting hole and is engaged with the mounting hole.

[0008] In one embodiment of the present invention, the mounting base further includes a movable block and a second elastic member. The movable block includes a second boss and a first positioning hole. The first positioning hole passes through the movable block, and one end of the first positioning hole is located at the top of the second boss. The top of the first boss is located inside the first positioning hole. The second elastic member is located between the movable block and the fixed block.

[0009] In one embodiment of the present invention, the mounting base further includes a limiting block, the limiting block being connected to the fixing block, the limiting block having a second positioning hole, the second boss passing through the second positioning hole, and the edge of the first positioning hole having a positioning groove.

[0010] In one embodiment of the present invention, the support assembly further includes a support plate and a pressure plate, the support plate being connected between the mounting plate and the base plate, the pressure plate being connected to the mounting plate, and the circuit board being clamped between the pressure plate and the mounting plate.

[0011] In one embodiment of the invention, a pad and a bushing are connected to the side of the base plate away from the support assembly, and the pad is located at the edge of the base plate away from the support assembly.

[0012] In one embodiment of the present invention, the cover plate is provided with a clearance hole, which corresponds to the position of the test piece.

[0013] In one embodiment of the present invention, the positioning component includes a third elastic member, the first positioning member includes a blocking portion extending toward the cover plate, and the third elastic member is located between the blocking portion and the cover plate.

[0014] The technical solution of the present invention has the following advantages compared with the prior art:

[0015] The positioning device for testing described in this invention features a cover plate hinged to a movable plate, and a first elastic element between the movable plate and the base plate. This allows the cover plate to move horizontally towards the camera, preventing the camera from shifting due to downward pressure. This avoids camera position displacement caused by cover plate rotation, improving the alignment accuracy between the camera and the test piece during testing. The movable block and the second elastic element provide cushioning when the cover plate abuts against the camera, and also prevent hard collisions that could damage the test piece when the camera is placed on the movable block. A stop block supports the cover plate, keeping it horizontal during descent and preventing damage to the camera. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 is a schematic diagram of the structure of a positioning device for testing according to the present invention;

[0018] Figure 2 is a schematic diagram of the assembly structure of the camera, support components and test components;

[0019] Figure 3 is a partial structural schematic diagram of Figure 2;

[0020] Figure 4 is a schematic diagram of the positioning component;

[0021] Figure 5 is a schematic diagram of the bottom structure of the base plate;

[0022] Figure 6 is a schematic diagram of the test component;

[0023] Figure 7 is a schematic diagram of the exploded structure of the test component;

[0024] Figure 8 is a partial structural diagram of the positioning component;

[0025] Figure 9 is a schematic diagram of the cover plate;

[0026] Figure 10 is a structural schematic diagram of the first positioning component;

[0027] Figure 11 is a schematic diagram of the assembly structure of the second positioning component and the connecting plate.

[0028] Explanation of reference numerals in the accompanying drawings: 1. Base plate; 2. Support assembly; 3. Test assembly; 4. Positioning assembly; 5. Circuit board; 6. Camera; 11. Pad; 12. Bushing; 21. Mounting plate; 22. Support plate; 23. Pressure plate; 31. Fixing block; 32. Limiting block; 33. Movable block; 34. Test piece; 35. Mounting slot; 36. Mounting block; 41. Connecting seat; 42. Slide rail; 43. Slider; 44. Movable plate; 45. First elastic element; 46. Positioning pin; 47. Cover plate; 48. ... 49. Positioning component; 61. Connecting plate; 321. Base; 331. Second positioning hole; 332. Second boss; 333. First positioning hole; 333. Positioning groove; 361. Connecting part; 362. First boss; 363. Mounting hole; 411. Limiting plate; 441. First rotating shaft; 442. Stop block; 471. Clearance hole; 472. Mounting part; 473. Second rotating shaft; 481. Blocking part; 482. Unlocking part; 483. First positioning part; 491. Second positioning component; 492. Second positioning part. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0030] Referring to Figures 1 to 4, a positioning device for testing according to the present invention includes: a base plate 1; a support assembly 2, including a mounting plate 21 and a circuit board 5, wherein the mounting plate 21 is connected to the base plate 1 and the circuit board 5 is located on the mounting plate 21; a testing assembly 3, including a mounting base and a test piece 34, wherein the mounting base is connected to the mounting plate 21, the circuit board 5 is clamped between the mounting base and the mounting plate 21, the test piece 34 is snapped into the mounting base, and one end of the test piece 34 abuts against the circuit board 5; and a positioning assembly 4, including a connecting base 41 and a first... The system includes an elastic element 45, a movable plate 44, a cover plate 47, a first positioning element 48, and a second positioning element 491. The connecting seat 41 is connected to the base plate 1, and the movable plate 44 is slidably connected to the connecting seat 41. The first elastic element 45 is located between the movable plate 44 and the base plate 1. The cover plate 47 is hinged to the movable plate 44 and can move towards the mounting seat. The first positioning element 48 is hinged to the cover plate 47, and the second positioning element 491 is connected to the base plate 1. The first positioning element 48 can engage with the second positioning element 491.

[0031] This embodiment of the positioning device for testing takes the testing of camera 6 as an example. Camera 6 includes a base 61, and the docking end of camera 6 is located at the bottom of base 61. When testing camera 6, firstly, camera 6 is placed on the mounting base, with base 61 corresponding to the position of test piece 34. Then, cover plate 47 is rotated to keep cover plate 47 in a horizontal state. Next, pressure is applied to cover plate 47 to keep cover plate 47 in a horizontal state and lower it. During the lowering process of cover plate 47, first elastic member 45 is compressed until cover plate 47 abuts against base 61 of camera 6, and at the same time, camera 6 abuts against test piece 34. Finally, first positioning member 48 and second positioning member 491 are engaged, and camera 6 can be tested through test piece 34. By hinged between the cover plate 47 and the movable plate 44, and by providing a first elastic element 45 between the movable plate 44 and the base plate 1, the cover plate 47 can move horizontally toward the camera 6. The camera 6 will not be shifted due to the downward pressure, thus avoiding the camera 6 shifting due to the rotation of the cover plate 47, and improving the alignment accuracy between the camera 6 and the test piece 34 during testing.

[0032] Referring to Figure 5, the base plate 1 is generally flat and serves to support the support assembly 2, the testing assembly 3, and the positioning assembly 4. A pad 11 and a bushing 12 are connected to the side of the base plate 1 away from the support assembly 2; that is, the bottom side of the base plate 1 is connected to the pad 11 and the bushing 12. The pad 11 can be considered as a wear-resistant strip. The two pads 11 are located on the edge of the base plate 1 away from the support assembly 2. During the movement of the testing positioning device via the moving mechanism, the pads 11 prevent wear on the base plate 1. Two bushings 12 are connected to the bottom of the base plate 1, and the bushings 12 are used for positioning the base plate 1 with external equipment.

[0033] Referring to Figure 2, the support assembly 2 includes a mounting plate 21 and a circuit board 5. The mounting plate 21 is connected to the base plate 1, and the circuit board 5 is located on the mounting plate 21. Specifically, the support assembly 2 also includes a support plate 22 and a pressure plate 23. The support assembly 2 is connected to the top side of the base plate 1. The two support plates 22 are connected between the mounting plate 21 and the base plate 1. The support plates 22 are used to support the mounting plate 21, and the two support plates 22 are arranged opposite to each other and parallel. The circuit board 5 is located on the top side of the mounting plate 21. The pressure plate 23 is connected to the mounting plate 21 by screws. Specifically, the screws pass through the pressure plate 23 and the circuit board 5 and are connected to the mounting plate 21, thereby clamping the circuit board 5 between the pressure plate 23 and the mounting plate 21, thereby positioning and fixing the position of the circuit board 5.

[0034] Referring to Figures 3, 6, and 7, the test assembly 3 includes a mounting base and a test piece 34, which can be considered as a probe. The mounting base is connected to the mounting plate 21, and the circuit board 5 is clamped between the mounting base and the mounting plate 21. The test piece 34 is snapped into the mounting base, and one end of the test piece 34 abuts against the circuit board 5. Specifically, the mounting base includes a fixing block 31 and a mounting block 36. The fixing block 31 is connected to the mounting plate 21 by screws. The screws pass through the fixing block 31 and the circuit board 5 and are connected to the mounting plate 21, thereby clamping the circuit board 5 between the fixing block 31 and the mounting plate 21, thereby positioning and fixing the position of the circuit board 5. The fixing block 31 and the pressure plate 23 simultaneously clamp the circuit board 5, thereby ensuring that the circuit board 5 is subjected to uniform force and preventing the end of the circuit board 5 from warping. The fixing block 31 is provided with a mounting groove 35 that matches the mounting block 36. The mounting block 36 includes a connecting part 361, a first boss 362, and a mounting hole 363. The two connecting parts 361 are located at opposite ends of the mounting block 36, and the connecting parts 361 are located within the mounting groove 35 and connected to the bottom of the mounting groove 35. The mounting hole 363 is a stepped hole, and multiple mounting holes 363 are arranged in an equidistant array and penetrate the mounting block 36 vertically. The first boss 362 is located at the top of the mounting block 36, and the top of the mounting hole 363 is located at the top of the first boss 362. The test piece 34 penetrates the mounting hole 363 and engages with it. Depending on the number and position of the test pieces 34 required for testing the camera 6, one or more test pieces 34 can engage with mounting holes 363 at different positions, thereby enabling testing of different cameras 6. The bottom of the mounting slot 35 has an opening corresponding to the position of the test piece 34, so that the bottom end of the test piece 34 can abut against the circuit board 5, and the top end of the test piece 34 protrudes from the top end of the mounting hole 363.

[0035] The mounting base also includes a movable block 33 and a second elastic element (not shown). The movable block 33 includes a second boss 331 and a first positioning hole 332. The second boss 331 is located at the top of the movable block 33, and the first positioning hole 332 penetrates the movable block 33 vertically, with the top of the first positioning hole 332 located at the top of the second boss 331. The top of the first boss 362 on the mounting block 36 is located inside the first positioning hole 332. The second elastic element can be considered as a compression spring. Multiple second elastic elements are located between the movable block 33 and the fixed block 31. The first boss 362 is slidably connected to the first positioning hole 332, thereby enabling the movable block 33 to rise and fall vertically. The second elastic element provides a buffering effect when the cover plate 47 abuts against the camera 6.

[0036] The mounting base also includes a limiting block 32, which is connected to the fixed block 31. The limiting block 32 has a second positioning hole 321 penetrating through it in the vertical direction. A second boss 331 penetrates the second positioning hole 321 and is slidably connected to the second positioning hole 321. The limiting block 32 is used to restrict the extreme movement position of the movable block 33, making the movable block 33's movable distance smaller. At the same time, the first boss 362 is slidably connected to the first positioning hole 332, and the second boss 331 is slidably connected to the second positioning hole 321, thereby guiding the movement of the movable block 33 and preventing it from shaking during movement. The first positioning hole 332 on the movable block 33 has a positioning groove 333 on its edge. The positioning groove 333 surrounds the first positioning hole 332 around its circumference. The size of the positioning groove 333 is adapted to the base 61 of the camera 6. The bottom edge of the base 61 can engage with the positioning groove 333 to position the camera 6, so that the bottom of the base 61 can correspond to the position of the test piece 34 in the vertical direction.

[0037] Referring to Figures 4 and 8, the positioning assembly 4 includes a connecting seat 41, a first elastic element 45, and a movable plate 44. The connecting seat 41 is connected to the base plate 1, and the movable plate 44 is slidably connected to the connecting seat 41. The first elastic element 45 is located between the movable plate 44 and the base plate 1. Specifically, the positioning assembly 4 also includes a slide rail 42, a slider 43, a limiting plate 411, and positioning pins 46. The slide rail 42 is connected to the connecting seat 41, and the guide path of the slide rail 42 is vertically arranged. The slider 43 is slidably connected to the slide rail 42, and the movable plate 44 is connected to the slider 43, thereby allowing the movable plate 44 to be slidably connected to the connecting seat 41, enabling the movable plate 44 to move up and down in the vertical direction. The three positioning pins 46 are connected to the base plate 1. The first elastic element 45 can be considered as a compression spring, and the bottom ends of the three first elastic elements 45 are respectively sleeved on the three positioning pins 46. The bottom end of the movable plate 44 is provided with three mounting holes corresponding to the positions of the first elastic member 45. The top end of the first elastic member 45 is located in the mounting holes and abuts against the top of the mounting holes. Through the positioning pin 46 and the mounting holes, the position of the first elastic member 45 is fixed and the extension and retraction of the first elastic member 45 can be guided. The limiting plate 411 is connected to the end of the connecting seat 41 away from the bottom plate 1, that is, the limiting plate 411 is located at the top of the connecting seat 41. At the same time, the limiting plate 411 is also located at the top of the slide rail 42. The elastic force applied to the movable plate 44 by the first elastic member 45 allows the slider 43 to abut against the limiting plate 411. The limiting plate 411 is used to limit the extreme movement position of the slider 43, thereby preventing the slider 43 from disengaging from the slide rail 42 after being subjected to the elastic force of the first elastic member 45.

[0038] Referring to Figures 8 and 9, the positioning assembly 4 further includes a cover plate 47, a first positioning member 48, and a second positioning member 491. The cover plate 47 is hinged to the movable plate 44, the first positioning member 48 is hinged to the cover plate 47, and the second positioning member 491 is connected to the base plate 1. The first positioning member 48 can engage with the second positioning member 491. Specifically, a first rotating shaft 441 is connected to the top of the movable plate 44, and a protruding mounting portion 472 is provided at one end of the cover plate 47. The first rotating shaft 441 passes through the mounting portion 472 of the cover plate 47, and the mounting portion 472 is rotatably connected to the first rotating shaft 441, thereby hinged the cover plate 47 to the movable plate 44. A clearance groove is provided at the top of the movable plate 44 corresponding to the rotation path of the mounting portion 472, thereby preventing interference between the mounting portion 472 and the movable plate 44, which would prevent the cover plate 47 from rotating. A stop 442 is provided on the side of the movable plate 44 near the first positioning member 48. The stop 442 is located on the rotation path of the end of the cover plate 47 with the mounting part 472. During the rotation of the cover plate 47, the bottom side of the end of the cover plate 47 with the mounting part 472 can abut against the top side of the stop 442, at which time the cover plate 47 is in a horizontal state. The stop 442 can support the cover plate 47, keeping the cover plate 47 in a horizontal state. By applying pressure to the cover plate 47, the cover plate 47 can be lowered along the slide rail 42, thereby allowing the cover plate 47 to move towards the mounting seat.

[0039] Referring to Figures 9 to 11, a second rotating shaft 473 is connected to the end of the cover plate 47 away from the mounting portion 472. The second rotating shaft 473 passes through the first positioning member 48, and the first positioning member 48 is hinged to the second rotating shaft 473, thereby hinged the first positioning member 48 to the cover plate 47. The positioning assembly 4 also includes a third elastic member (not shown), which can be considered as a compression spring. The first positioning member 48 includes a blocking portion 481 extending towards the cover plate 47. The blocking portion 481 is located at the top of the first positioning member 48, and the third elastic member is located between the blocking portion 481 and the cover plate 47. The bottom end of the first positioning member 48 has a first positioning portion 483 protruding towards the connecting seat 41. The positioning assembly 4 also includes a connecting plate 49, which is connected to the base plate 1. The support assembly 2 is located between the connecting seat 41 and the connecting plate 49. The second positioning member 491 is connected to the side of the connecting plate 49 away from the support assembly 2, and is also connected to the top sidewall of the connecting plate 49, thereby connecting the second positioning member 491 to the base plate 1 via the connecting plate 49. The second positioning member 491 includes a second positioning portion 492 protruding away from the connecting plate 49, and the top side of the first positioning portion 483 can abut against the bottom side of the second positioning portion 492, thereby allowing the first positioning member 48 to engage with the second positioning member 491. A spring force applied to the first positioning member 48 by the third elastic member ensures a stable engagement between the first positioning member 48 and the second positioning member 491. The top side of the second positioning part 492 is inclined, thus forming a guide surface. During the descent of the cover plate 47, the first positioning part 483 can slide along the guide surface. A third elastic member applies elastic force to the first positioning member 48, causing the first positioning part 483 to abut against the second positioning part 492, i.e., the first positioning member 48 and the second positioning member 491 are engaged. At this time, the positioning assembly 4 is in a locked state. The first positioning member 48 also includes an unlocking part 482, located at the top of the first positioning member 48 and extending away from the cover plate 47. Applying pressure to the unlocking part 482 facilitates the rotation of the first positioning member 48. By rotating the first positioning member 48, the first positioning part 483 disengages from the second positioning part 492. At this time, the first positioning member 48 is no longer engaged with the second positioning member 491, and the positioning assembly 4 is in an unlocked state. The second rotating shaft 473 passes through the first positioning member 48 at the position where the unlocking part 482 and the blocking part 481 meet. Preferably, the contact surfaces of the first positioning part 483 and the second positioning part 492 at their contact positions are inclined, thereby making the engagement of the first positioning member 48 and the second positioning member 491 more stable.

[0040] A clearance hole 471 is provided in the middle of the cover plate 47, and the clearance hole 471 corresponds to the position of the test end of the test piece 34. During the descent of the cover plate 47, the top of the camera 6 can pass through the clearance hole 471, and the edge of the clearance hole 471 abuts against the top of the base 61 of the camera 6.

[0041] In use, first place the camera 6 on the movable block 33, and the base 61 of the camera 6 engages with the positioning groove 333. At this time, there is a gap between the camera 6 and the test end of the test piece 34. Then rotate the cover plate 47 so that the cover plate 47 abuts against the stop block 442. At this time, the cover plate 47 is in a horizontal state, the slider 43 abuts against the limit plate 411, and the cover plate 47 is a certain distance away from the camera 6. Next, apply pressure to the cover plate 47 to keep the cover plate 47 in a horizontal state and lower it. During the descent of the cover plate 47, the first elastic member 45 is compressed until the top of the camera 6 penetrates the clearance hole 471 on the cover plate 47. The edge of the clearance hole 471 abuts against the top of the base 61 of the camera 6. At the same time, the third elastic member drives the first positioning member 48 to engage with the second positioning member 491. The movable block 33 descends, and the second elastic member is compressed. At this time, the test end of the test piece 34 abuts against the camera 6, and the camera 6 can be tested through the test piece 34. After the test is completed, the first positioning part 48 is rotated by the unlocking part 482, so that the first positioning part 483 is disengaged from the second positioning part 492. The first elastic part 45 drives the slider 43 to reset, so that the slider 43 abuts against the limiting plate 411. The second elastic part drives the movable block 33 to reset. There is a gap between the camera 6 and the test end of the test piece 34. Finally, the cover plate 47 is rotated so that the cover plate 47 abuts against the limiting plate 411, and the camera 6 is taken out.

[0042] A positioning device for testing according to the present invention comprises a cover plate 47 hinged to a movable plate 44, and a first elastic member 45 provided between the movable plate 44 and the base plate 1. This allows the cover plate 47 to move horizontally towards the camera 6, preventing the camera 6 from shifting position under vertical downward pressure. This avoids camera 6 position shift due to cover plate 47 rotation, improving the alignment accuracy between the camera 6 and the test piece 34 during testing. The movable block 33 and the second elastic member provide a buffering effect after the cover plate 47 abuts against the camera 6. Simultaneously, during the placement of the camera 6 on the movable block 33, a hard collision between the camera 6 and the test piece 34, preventing damage to the test piece 34, is avoided. The stop block 442 supports the cover plate 47, ensuring it remains horizontal during descent and preventing damage to the camera 6.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A positioning device for testing, characterized in that, include: A base plate; a support assembly including a mounting plate and a circuit board, the mounting plate being connected to the base plate and the circuit board located on the mounting plate; a testing assembly including a mounting base and a test piece, the mounting base being connected to the mounting plate, the circuit board being clamped between the mounting base and the mounting plate, the test piece being snapped into the mounting base, and one end of the test piece abutting against the circuit board; a positioning assembly including a connecting base, a first elastic element, a movable plate, a cover plate, a first positioning element, and a second positioning element, the connecting base being connected to the base plate, the movable plate being slidably connected to the connecting base, the first elastic element being located between the movable plate and the base plate, the cover plate being hinged to the movable plate and movable, the cover plate being movable towards the mounting base, the first positioning element being hinged to the cover plate, and the second positioning element being connected to the base plate and snapping into the second positioning element.

2. The positioning device for testing according to claim 1, characterized in that: The positioning component further includes a slide rail, a slider, and a limiting plate. The slide rail is connected to the connecting seat, the slider is slidably connected to the slide rail, the movable plate is connected to the slider, and the limiting plate is connected to the end of the connecting seat away from the base plate. The slider can abut against the limiting plate.

3. The positioning device for testing according to claim 1, characterized in that: A stop is provided on the side of the movable plate near the first positioning member, and the stop is located on the rotation path of the cover plate.

4. The positioning device for testing according to claim 1, characterized in that: The mounting base includes a fixing block and a mounting block. The fixing block is connected to the mounting plate. The fixing block is provided with a mounting groove. The mounting block includes a connecting part, a first boss and a mounting hole. The connecting part is located in the mounting groove and is connected to the bottom of the mounting groove. The mounting hole passes through the mounting block. One end of the mounting hole is located at the top of the first boss. The test piece passes through the mounting hole and is engaged with the mounting hole.

5. The positioning device for testing according to claim 4, characterized in that: The mounting base further includes a movable block and a second elastic element. The movable block includes a second boss and a first positioning hole. The first positioning hole passes through the movable block, and one end of the first positioning hole is located at the top of the second boss. The top of the first boss is located inside the first positioning hole. The second elastic element is located between the movable block and the fixed block.

6. The positioning device for testing according to claim 5, characterized in that: The mounting base also includes a limiting block, which is connected to the fixing block. The limiting block has a second positioning hole, and the second boss passes through the second positioning hole. The edge of the first positioning hole has a positioning groove.

7. The positioning device for testing according to claim 1, characterized in that: The support assembly further includes a support plate and a pressure plate. The support plate is connected between the mounting plate and the base plate, and the pressure plate is connected to the mounting plate. The circuit board is clamped between the pressure plate and the mounting plate.

8. The positioning device for testing according to claim 1, characterized in that: A pad and a bushing are connected to the side of the base plate away from the support assembly, and the pad is located on the edge of the base plate away from the support assembly.

9. The positioning device for testing according to claim 1, characterized in that: The cover plate is provided with clearance holes, which correspond to the position of the test piece.

10. The positioning device for testing according to claim 1, characterized in that: The positioning component includes a third elastic member, and the first positioning member includes a blocking portion extending toward the cover plate, the third elastic member being located between the blocking portion and the cover plate.

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