Circuit board withstand voltage test device

Abstract

The utility model belongs to the technical field of circuit board testing, and discloses a circuit board withstand voltage testing device, which comprises a fixed seat, a clamping assembly, an adjusting assembly and a pressing plate, in the device, as the spiral directions of a first external thread and a second external thread are opposite, and a first sliding block and a second sliding block are symmetrically arranged relative to the middle part of a screw rod, when the screw rod is rotated, the first sliding block and the second sliding block can slide relatively to the middle part of the screw rod; the first sliding block and the second sliding block slide oppositely or oppositely at the same time for the same distance in the axial direction of the screw rod, so that the first clamping piece and the second clamping piece are driven to slide oppositely or oppositely at the same time for the same distance on the fixing base in the axial direction of the sliding groove. The circuit board is just located in the middle of the base, so that the situation that the position of the circuit board deviates in the process that the circuit board is pressed by the pressing plate, and the pressure test result is affected is avoided.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, and in particular to a circuit board withstand voltage testing device. Background Technology

[0002] Circuit boards are also known as ceramic circuit boards, alumina ceramic circuit boards, aluminum nitride ceramic circuit boards, PCBs, aluminum substrate boards, high-frequency boards, thick copper boards, impedance boards, ultra-thin circuit boards, and printed circuit boards (copper etching technology). Circuit boards miniaturize and visualize circuits, playing a crucial role in the mass production of fixed circuits and optimizing the layout of electrical appliances. Circuit boards can be called printed circuit boards or printed circuit boards.

[0003] Conducting withstand voltage tests on circuit boards checks their insulation performance under high voltage, ensuring that there is no leakage or short circuit between different electrical lines on the board, or between lines and ground, thus guaranteeing the safety and stability of electronic products during normal operation. It also assesses the electrical strength of the circuit board, verifying its ability to withstand specified operating voltages and potential transient overvoltages without breakdown or other damage, improving product reliability and lifespan.

[0004] Current circuit board withstand voltage testing devices commonly employ direct pressure on the circuit board to complete the withstand voltage test. However, these devices have a significant drawback: they lack the ability to effectively limit the circuit board's position. During testing, the circuit board lacks stable constraint, making it difficult to maintain a stable state. When pressure is applied by the testing device, the circuit board is prone to displacement. Even extremely slight displacement can interfere with the transmission and reception of test signals, thus affecting the final test results and causing data deviations that fail to accurately reflect the circuit board's true withstand voltage performance.

[0005] Therefore, there is an urgent need to develop a circuit board withstand voltage testing device to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a circuit board withstand voltage testing device to solve the problem that the position of the circuit board may shift during the pressing process of the pressure plate, resulting in inaccurate test results.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A circuit board withstand voltage testing device, comprising:

[0009] The mounting base has a groove on its upper surface;

[0010] The clamping assembly includes a first clamping member and a second clamping member. The side surfaces of the first clamping member and the second clamping member are slidably connected to the groove wall of the slide, and the circuit board can be clamped between the first clamping member and the second clamping member.

[0011] The adjustment assembly includes a screw, a first slider, and a second slider. The screw is rotatably mounted on a fixed seat. The screw has a first external thread and a second external thread with opposite helical directions spaced apart. The first slider is fixedly connected to the bottom of a first clamping member, and the second slider is fixedly connected to the bottom of a second clamping member. The first slider has a first internal thread, and the second slider has a second internal thread. The first external thread and the first internal thread are threaded together, and the second external thread and the second internal thread are threaded together. Along the axial direction of the screw, the first slider and the second slider are symmetrically arranged about the middle of the screw.

[0012] The pressing assembly includes a pressure plate located directly above the circuit board, which can press the circuit board.

[0013] Preferably, the circuit board withstand voltage testing device further includes a first limiting component, which includes a first limiting groove, a first limiting member, and a second limiting member. The first limiting groove is formed at the bottom of the slide groove, and the length direction of the first limiting groove is parallel to the length direction of the slide groove. The first limiting member is fixedly connected to the bottom of the first slider, and the second limiting member is fixedly connected to the bottom of the second slider. The bottom of the first limiting member and the bottom of the second limiting member are both slidably connected to the bottom of the first limiting groove.

[0014] Preferably, the circuit board withstand voltage testing device also includes a testing component, which includes a pressure sensor, a spring, and an electric telescopic rod. The pressing component also includes a fixed frame, a support member, and a top plate. The fixed frame has an opening facing the circuit board. One end of the spring is fixedly connected to the bottom wall of the opening, and the other end of the spring is connected to the input end of the pressure sensor. The fixed end of the pressure sensor is fixedly connected to the surface of the pressure plate. The pressure plate can be movably inserted through the opening of the opening. One end of the support member is fixedly connected to the top plate, and the other end of the support member is fixedly connected to the upper surface of the fixed base. The electric telescopic rod is inserted through the top plate, and the output end of the electric telescopic rod is fixedly connected to the fixed frame.

[0015] Preferably, the number of springs is at least two, and the at least two springs are evenly distributed on the surface of the pressure plate.

[0016] Preferably, the circuit board withstand voltage test device also includes a display, and the output of the pressure sensor is connected to the display signal.

[0017] Preferably, the circuit board withstand voltage test device further includes a second limiting component, which includes a second limiting groove and a third limiting member. The second limiting groove is opened on the side wall of the opening, and the third limiting member is fixedly connected to the side of the pressure plate and slidably connected to the groove wall of the second limiting groove.

[0018] And / or, the second limiting component includes a third limiting groove and a fourth limiting member. The third limiting groove is formed on the side wall on the other side of the opening, and the fourth limiting member is fixedly connected to the side of the pressure plate and slidably connected to the groove wall of the third limiting groove.

[0019] Preferably, the circuit board withstand voltage test device also includes a support base, and the number of support bases is multiple, with multiple support bases fixedly connected to the bottom of the fixed base.

[0020] Preferably, the circuit board withstand voltage testing device also includes an anti-slip pad, which is fixedly connected to the bottom of the support base.

[0021] Preferably, the clamping assembly further includes a first rubber pad and a second rubber pad. Along the sliding direction of the first clamping member, the first rubber pad is fixedly connected to the side of the first clamping member facing the second clamping member, and the second rubber pad is fixedly connected to the side of the second clamping member facing the first clamping member.

[0022] Preferably, the adjustment assembly also includes a motor and a mounting bracket, with the fixed end of the motor fixedly connected to the mounting bracket, the output end of the motor connected to the screw, and the mounting bracket fixedly connected to the side surface of the mounting base along the axial direction of the screw.

[0023] The beneficial effects of this utility model are:

[0024] This utility model provides a circuit board withstand voltage testing device, including a fixed base, a clamping assembly, an adjusting assembly, and a pressing assembly. The upper surface of the fixed base has a sliding groove. The clamping assembly includes a first clamping member and a second clamping member, the side surfaces of which are slidably connected to the groove wall, allowing the circuit board to be clamped between them. The adjusting assembly includes a screw, a first slider, and a second slider. The screw rotatably passes through the fixed base and has a first external thread and a second external thread with opposite helical directions spaced apart. The first slider is fixedly connected to the bottom of the first clamping member, and the second slider is fixedly connected to the bottom of the second clamping member. The first slider has a first internal thread, and the second slider has a second internal thread. The first external thread and the first internal thread are threadedly engaged, and the second external thread and the second internal thread are threadedly engaged. Along the axial direction of the screw, the first slider and the second slider are symmetrically arranged about the middle of the screw. The pressing assembly includes a pressure plate located directly above the circuit board, capable of pressing the circuit board. In this device, since the first and second external threads have opposite helical directions, and the first and second sliders are symmetrically arranged about the middle of the screw, when the screw is rotated, the first and second sliders slide the same distance relative to or away from each other along the axial direction of the screw. This causes the first and second clamping members to slide the same distance relative to or away from each other along the axial direction of the groove on the fixed seat. When the first and second clamping members clamp the circuit board, the circuit board is located exactly in the middle of the base, preventing the pressure plate from shifting the position of the circuit board during the pressing process, which would affect the pressure test results. Attached Figure Description

[0025] Figure 1 This is a front view of the circuit board withstand voltage testing device provided in this embodiment;

[0026] Figure 2 yes Figure 1 A schematic diagram of the full cross-section structure;

[0027] Figure 3 yes Figure 1 A cross-sectional view along the AA direction.

[0028] In the picture:

[0029] 1. Fixed base; 11. Slide groove; 21. First clamping member; 22. Second clamping member; 23. First rubber pad; 24. Second rubber pad; 31. Screw; 32. First slider; 33. Second slider; 34. Motor; 35. Fixed frame; 41. Pressure plate; 42. Fixed frame; 43. Support member; 44. Top plate; 5. Circuit board; 61. First limiting groove; 62. First limiting member; 63. Second limiting member; 64. Second limiting groove; 65. Third limiting member; 66. Third limiting groove; 67. Fourth limiting member; 71. Pressure sensor; 72. Spring; 73. Electric telescopic rod; 74. Display; 75. Limiting rod; 81. Support base; 82. Anti-slip pad. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] This embodiment provides a circuit board withstand voltage testing device to solve the problem that the position of the circuit board may shift during the pressing process of the pressure plate, resulting in inaccurate test results.

[0035] Specifically, such as Figures 1 to 3 As shown, a circuit board withstand voltage testing device includes a fixed base 1, a clamping assembly, an adjusting assembly, and a pressing assembly. The upper surface of the fixed base 1 has a sliding groove 11. The clamping assembly includes a first clamping member 21 and a second clamping member 22. The side surfaces of the first clamping member 21 and the second clamping member 22 are slidably connected to the groove wall of the sliding groove 11, allowing the circuit board 5 to be clamped between the first clamping member 21 and the second clamping member 22. The adjusting assembly includes a screw 31, a first slider 32, and a second slider 33. The screw 31 rotatably passes through the fixed base 1, and the screw 31 has spaced sections with opposite spiral directions. The screw 31 has a first external thread and a second external thread. The first slider 32 is fixedly connected to the bottom of the first clamping member 21, and the second slider 33 is fixedly connected to the bottom of the second clamping member 22. The first slider 32 has a first internal thread, and the second slider 33 has a second internal thread. The first external thread and the first internal thread are threaded together, and the second external thread and the second internal thread are threaded together. Along the axial direction of the screw 31, the first slider 32 and the second slider 33 are symmetrically arranged about the middle of the screw 31. The pressing assembly includes a pressure plate 41, which is located directly above the circuit board 5 and can press the circuit board 5. In this device, since the first external thread and the second external thread have opposite helical directions, and the first slider 32 and the second slider 33 are symmetrically arranged about the middle of the screw 31, when the screw 31 is rotated, the first slider 32 and the second slider 33 slide relative to or away from each other along the axial direction of the screw 31 by the same distance. This causes the first clamping member 21 and the second clamping member 22 to slide relative to or away from each other along the axial direction of the slide groove 11 on the fixed base 1 by the same distance. When the first clamping member 21 and the second clamping member 22 clamp the circuit board 5, the circuit board 5 is located exactly in the middle of the base, which avoids the pressure plate 41 from causing the position of the circuit board 5 to shift during the pressing process, thus affecting the pressure test results.

[0036] Furthermore, the clamping assembly also includes a first rubber pad 23 and a second rubber pad 24. Along the sliding direction of the first clamping member 21, the first rubber pad 23 is attached to the side of the first clamping member 21 facing the second clamping member 22, and the second rubber pad 24 is attached to the side of the second clamping member 22 facing the first clamping member 21. The edge of the circuit board 5 directly contacts the first rubber pad 23 and the second rubber pad 24 to avoid excessive clamping force from damaging the circuit board 5.

[0037] Optionally, the circuit board withstand voltage testing device further includes a first limiting component, which includes a first limiting groove 61, a first limiting member 62, and a second limiting member 63. The first limiting groove 61 is formed at the bottom of the slide groove 11, and the length direction of the first limiting groove 61 is parallel to the length direction of the slide groove 11. The first limiting member 62 is fixedly connected to the bottom of the first slider 32, and the second limiting member 63 is fixedly connected to the bottom of the second slider 33. The bottoms of the first limiting member 62 and the bottoms of the second limiting member 63 are both slidably connected to the bottom of the first limiting groove 61, thereby limiting the sliding range of the first slider 32 and the second slider 33 and preventing them from sliding out of the screw 31, which would affect the clamping of the circuit board 5 by the first clamping member 21 and the second clamping member 22. In this embodiment, the first limiting member 62 is bonded to the first slider 32; in other embodiments, the first limiting member 62 is welded to the first slider 32. In this embodiment, the second limiting member 63 is bonded to the second slider 33. In other embodiments, the second limiting member 63 is welded to the second slider 33 or bolted together.

[0038] Optionally, the adjustment assembly also includes a motor 34 and a fixing frame 35. The fixed end of the motor 34 is fixedly connected to the fixing frame 35, and the output end of the motor 34 is connected to the screw 31. Along the axial direction of the screw 31, the fixing frame 35 is fixedly connected to the side surface of the fixing seat 1. By driving the screw 31 to rotate forward and reverse, the first slider 32 and the second slider 33 respectively drive the first clamping member 21 and the second clamping member 22 to slide, thereby achieving the clamping and releasing of the circuit board 5. In this embodiment, the motor 34 is a servo motor 34; in other embodiments, the motor 34 is a stepper motor 34. It should be noted that both the servo motor 34 and the stepper motor 34 are commonly used motors 34 with forward and reverse rotation functions, and will not be described in detail here. Furthermore, the aforementioned forward and reverse rotations refer to the screw 31 being able to rotate in two opposite directions to enable the first slider 32 and the second slider 33 to slide on the screw 31. For example, when the screw 31 rotates clockwise, the first slider 32 and the second slider 33 slide towards each other, enabling the first clamping member 21 and the second clamping member 22 to clamp the circuit board 5. When the screw 31 rotates counterclockwise, the first slider 32 and the second slider 33 slide away from each other, enabling the first clamping member 21 and the second clamping member 22 to release the circuit board 5.

[0039] Optionally, the circuit board withstand voltage testing device also includes a testing component, which includes a pressure sensor 71, a spring 72, and an electric telescopic rod 73. The pressing component also includes a fixed frame 42, a support member 43, and a top plate 44. The fixed frame 42 has an opening facing the circuit board 5. One end of the spring 72 is fixedly connected to the bottom wall of the opening, and the other end of the spring 72 is connected to the input end of the pressure sensor 71. The fixed end of the pressure sensor 71 is fixedly connected to the surface of the pressure plate 41. The pressure plate 41 can be movably inserted through the opening of the opening. One end of the support member 43 is fixedly connected to the top plate 44, and the other end of the support member 43 is fixedly connected to the upper surface of the fixed base 1. The electric telescopic rod 73 is inserted through the top plate 44, and the output end of the electric telescopic rod 73 is fixedly connected to the fixed frame 42. The support member 43 is provided to support and fix the top plate 44 on the fixed seat 1. The electric telescopic rod 73 is inserted through the top plate 44, thereby fixing the electric telescopic rod 73. The extension and retraction of the electric telescopic rod 73 realizes the movement of the fixed frame 42 relative to the fixed seat 1. When the electric telescopic rod 73 extends, the fixed frame 42 moves closer to the circuit board 5, and the pressure plate 41 presses the circuit board 5. The reaction force of the pressure plate 41 causes the spring 72 to contract. The elastic force of the spring 72 squeezes the pressure sensor 71, thereby detecting the pressure of the pressure plate 41 on the circuit board 5.

[0040] Furthermore, the number of springs 72 is at least two, and the at least two springs 72 are evenly distributed on the surface of the pressure plate 41. The even distribution of at least two springs 72 can achieve uniform bearing of the reaction force of the pressure plate 41, making the detection result of the pressure of the pressure plate 41 on the circuit board 5 more accurate. In this embodiment, the number of springs 72 is four. In other embodiments, the number of springs 72 can be two, five, or seven, etc.

[0041] Furthermore, the number of support members 43 is at least two, and the at least two support members 43 are evenly distributed along the upper surface of the fixing base 1 to improve the support of the top plate 44 and prevent the top plate 44 from tilting, which would cause the fixing frame 42 to tilt and prevent the pressure plate 41 from pressing the circuit board 5 smoothly, thus affecting the test results. In this embodiment, the number of support members 43 is four. In other embodiments, the number of support members 43 can be two, three, or five, etc.

[0042] Optionally, the circuit board withstand voltage test device also includes a limiting rod 75. One end of the limiting rod 75 is fixedly connected to the upper surface of the fixed frame 42. The limiting rod 75 is movably inserted through the top plate 44 to prevent the fixed frame 42 from rotating during the reciprocating movement of the electric telescopic rod 73, which would prevent the pressure plate 41 from pressing the circuit board 5.

[0043] Furthermore, the number of limiting rods 75 is at least two, and the at least two limiting rods 75 are evenly distributed along the circumference of the electric telescopic rod 73 to further prevent the rotation of the electric telescopic rod 73. In this embodiment, the number of limiting rods 75 is two; in other embodiments, the number of limiting rods 75 can be three, four, or five, etc.

[0044] Optionally, the circuit board withstand voltage testing device also includes a display 74. The output terminal of the pressure sensor 71 is connected to the display 74. The pressure sensor 71 converts the pressure signal measured by the pressure plate 41 on the circuit board 5 into an electrical signal, which is then transmitted to the display 71 through a specific interface and circuit. The display 71 converts the electrical signal into an intuitive pressure value for display, thereby facilitating the observation of the pressure measurement value. It should be noted that the display 71 is a commonly used display device in the art, and will not be described in detail here.

[0045] Furthermore, the display 74 is located on the side surface of the fixed frame 42, making it easier to observe the pressure value of the pressure sensor 71.

[0046] Optionally, the circuit board withstand voltage testing device further includes a second limiting component, which includes a second limiting groove 64 and a third limiting member 65. The second limiting groove 64 is formed on the side wall of the opening, and the third limiting member 65 is fixedly connected to the side of the pressure plate 41 and slidably connected to the groove wall of the second limiting groove 64. The second limiting component also includes a third limiting groove 66 and a fourth limiting member 67. The third limiting groove 66 is formed on the side wall of the other side of the opening, and the fourth limiting member 67 is fixedly connected to the side of the pressure plate 41 and slidably connected to the groove wall of the third limiting groove 66, so as to prevent the pressure plate 41 from falling out of the opening and affecting the pressing of the circuit board 5. In other embodiments, the second limiting component includes a second limiting groove 64 and a third limiting member 65. The second limiting groove 64 is formed on the side wall of the opening, and the third limiting member 65 is fixedly connected to the side of the pressure plate 41 and slidably connected to the groove wall of the second limiting groove 64. Alternatively, the second limiting component includes a third limiting groove 66 and a fourth limiting member 67. The third limiting groove 66 is formed on the side wall of the other side of the opening, and the fourth limiting member 67 is fixedly connected to the side of the pressure plate 41 and slidably connected to the groove wall of the third limiting groove 66.

[0047] Optionally, the circuit board withstand voltage testing device further includes multiple support bases 81. These support bases 81 are fixedly connected to the bottom of the fixed base 1, providing support for the fixed base 1 and facilitating the placement of the entire circuit board withstand voltage testing device on the workbench. In this embodiment, there are four support bases 81. In other embodiments, the number of support bases 81 can be three, five, or seven, etc. In this embodiment, the support base 81 is a block structure. In other embodiments, the support base 81 can be a plate-like structure. In this embodiment, the support base 81 is welded to the bottom of the fixed base 1. In other embodiments, the support base 81 is adhered to the bottom of the fixed base 1, or the support base 81 is bolted to the bottom of the fixed base 1.

[0048] Furthermore, the circuit board withstand voltage testing device also includes anti-slip pads 82, which are fixedly connected to the bottom of the support base 81. This improves the anti-slip performance of the support base 81 and prevents the fixed base 1 from sliding on the worktable, thus affecting the test results. It should be noted that the number of anti-slip pads 82 is equal to the number of support bases 81 and they correspond one-to-one.

[0049] The specific working principle and usage method of the circuit board withstand voltage testing device provided in this embodiment are as follows:

[0050] In use, the circuit board 5 is placed between the first clamping member 21 and the second clamping member. Then, the screw 31 is rotated by the motor 34. The rotation of the screw 31 causes the first slider 32 and the second slider 33 to slide towards each other on the inner wall of the moving slide groove 11, so that the first clamping member 21 and the second clamping member 22 can fix the circuit board 5, thereby preventing the position of the circuit board 5 from shifting during testing. After the circuit board 5 is fixedly clamped, the fixing frame 42 is lowered by the electric telescopic rod 73, so that the pressure plate 41 moves down to press the circuit board 5. When the pressure plate 41 presses the circuit board 5, the reaction force of the pressure plate 41 will cause the spring 72 to contract. At the same time, the elastic force of the spring 72 will squeeze the pressure sensor 71, thereby measuring the pressure of the pressure plate 41 on the circuit board 5. The value of the pressure sensor 71 can be observed and processed through the display 74.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A circuit board voltage withstand test apparatus characterized by comprising: The utility model relates to a circuit board pressure resistance test device, including: The upper surface of fixed seat (1) is provided with sliding groove (11); Clamping component, the side surface of first clamping piece (21) and the side surface of second clamping piece (22) are all with the sliding connection of groove wall of sliding groove (11), and circuit board (5) can be clamped between first clamping piece (21) and second clamping piece (22); Adjusting assembly, the screw rod (31) rotation passes through fixed seat (1), and the first external thread and the second external thread of opposite screw direction are located the interval on the screw rod (31), and the first sliding block (32) fixed connection is located the bottom of first clamping piece (21), and the second sliding block (33) fixed connection is located the bottom of second clamping piece (22), and the first internal thread is equipped with on the first sliding block (32), and the second internal thread is equipped with on the second sliding block (33), and the first external thread is with the first internal thread thread cooperation, and the second external thread is with the second internal thread thread cooperation, and along the axial direction of screw rod (31), the first sliding block (32) and the second sliding block (33) about the middle part of screw rod (31) symmetrical arrangement; Pressing assembly, the pressing plate (41) is located the just above circuit board (5), and the pressing plate (41) can press circuit board (5).

2. The circuit board voltage withstand test apparatus according to claim 1, wherein The utility model relates to a circuit board pressure resistance test device, including: The first limiting groove (61) is provided in the groove bottom of sliding groove (11), and the length direction of first limiting groove (61) is parallel to the length direction of sliding groove (11), and the first limiting piece (62) fixed connection is located the bottom of first sliding block (32), and the second limiting piece (63) fixed connection is located the bottom of second sliding block (33), and the bottom of first limiting piece (62) and the bottom of second limiting piece (63) are all slidingly connected to the groove bottom of first limiting groove (61).

3. The circuit board voltage withstand test apparatus according to claim 1, wherein The circuit board voltage resistance test device further comprises a test assembly, the test assembly comprises a pressure sensor (71), a spring (72) and an electric telescopic rod (73), the pressing assembly further comprises a fixed frame (42), a support (43) and a top plate (44), the fixed frame (42) is provided with an open cavity, the opening of the open cavity faces the circuit board (5), one end of the spring (72) is fixedly connected with the bottom wall of the open cavity, the other end of the spring (72) is connected with the input end of the pressure sensor (71), the fixed end of the pressure sensor (71) is fixedly connected with the surface of the pressing plate (41), the pressing plate (41) can be movably arranged at the opening of the open cavity, one end of the support (43) is fixedly connected with the top plate (44), the other end of the support (43) is fixedly connected with the upper surface of the fixed seat (1), the electric telescopic rod (73) is arranged in the top plate (44), and the output end of the electric telescopic rod (73) is fixedly connected with the fixed frame (42).

4. The circuit board voltage withstanding test apparatus according to claim 3, wherein The number of the spring (72) is at least two, and the at least two springs (72) are uniformly distributed on the surface of the pressing plate (41).

5. The circuit board voltage withstanding test apparatus according to claim 4, wherein The circuit board voltage resistance test device further comprises a display (74), and the output end of the pressure sensor (71) is signal connected with the display (74).

6. The circuit board voltage withstand test apparatus according to claim 3, wherein The circuit board voltage resistance test device further comprises a second limiting assembly, the second limiting assembly comprises a second limiting groove (64) and a third limiting piece (65), the second limiting groove (64) is arranged on the side wall of the open cavity, the third limiting piece (65) is fixedly connected with the side surface of the pressing plate (41) and is in sliding connection with the groove wall of the second limiting groove (64). And / or, the second limiting assembly comprises a third limiting groove (66) and a fourth limiting piece (67), the third limiting groove (66) is arranged on the side wall of the other side of the open cavity, the fourth limiting piece (67) is fixedly connected with the side surface of the pressing plate (41) and is in sliding connection with the groove wall of the third limiting groove (66).

7. The circuit board voltage withstand test apparatus according to claim 1, wherein The circuit board voltage resistance test device further comprises a support seat (81), and the number of the support seat (81) is multiple, and the multiple support seats (81) are fixedly connected with the bottom of the fixed seat (1).

8. The circuit board voltage withstand test apparatus according to claim 7, wherein The circuit board voltage resistance test device further comprises an antiskid pad (82), and the antiskid pad (82) is fixedly connected with the bottom of the support seat (81).

9. The circuit board voltage withstand test apparatus according to any one of claims 1 to 8, characterized by, The adjusting assembly further comprises a motor (34) and a fixed frame (35), the fixed end of the motor (34) is fixedly connected with the fixed frame (35), the output end of the motor (34) is connected with the screw rod (31), along the axial direction of the screw rod (31), the fixed frame (35) is fixedly connected with the side surface of the fixed seat (1).

10. The circuit board voltage withstand test apparatus according to any one of claims 1 to 8, characterized by The clamping assembly further comprises a first rubber pad (23) and a second rubber pad (24), the first rubber pad (23) is fixedly connected to the first clamping piece (21) on the side facing the second clamping piece (22) along the sliding direction of the first clamping piece (21), and the second rubber pad (24) is fixedly connected to the second clamping piece (22) on the side facing the first clamping piece (21).

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