Circuit board electrical testing clamp

Abstract

The utility model relates to the technical field of circuit boards, in particular to a circuit board electrical testing clamp which comprises a tester body, a station table is installed on one side of the top of the tester body, a station groove is formed in the top of the station table, a cavity is formed in the bottom of the station table, and an ejection opening communicated with the cavity is formed in the middle of the station groove. A supporting table is inserted into the inner wall of the ejection opening, the top face of the supporting table is flush with the top face of the station table, a bottom plate is installed at the bottom of the cavity, and a plurality of second springs are installed between the top of the bottom plate and the bottom of the supporting table. According to the utility model, the circuit board can be conveniently pressed into the station groove for detection, the fixing operation of the circuit board is realized, the position of the probe on the test board is conveniently adjusted, the test operation of different positions of the circuit board is realized, the application range of the whole probe is expanded, and the effect of conveniently taking out the circuit board is realized; and the next circuit board can be conveniently tested.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, in particular to an electrical test fixture for circuit boards. Background Technique

[0002] During the production process of circuit board chip mounting, it is necessary to test semi-finished and finished circuit boards. Generally, a set of test fixtures is made for one circuit board. The lower probes are positioned mechanically, and the test is carried out through flying wire connection to check whether the circuit board is qualified.

[0003] After retrieval, a circuit board test fixture with the patent publication number of CN220137194U includes a fixture main body. A base is provided at the bottom end of the fixture main body. Fixed support frames are fixedly installed at the edges of the top end of the base. Symmetrically distributed chutes are provided on the inner side walls of the fixed support frames. A reciprocating motor is fixedly installed at the top end of the fixed support plate. A threaded rod is rotatably connected to the output end of the reciprocating motor. A threaded column is threadedly connected to the rod wall of the threaded rod. A test plate is fixedly installed at the bottom end of the threaded column. A plurality of probes are fixedly installed at the top end of the test plate, and the probes penetrate through the test plate. A connecting rod is fixedly installed on the side wall of the test plate, and a pulley sleeve is rotatably connected to the side wall of the connecting rod.

[0004] In the process of implementing the above solution, it is found that the following problems in the prior art have not been well solved: when the circuit board is placed on the electrical test fixture in the prior art, it is placed in a placement groove adapted to the circuit board. After the test is completed, the circuit board still remains in the placement groove, resulting in the problem of difficult taking, which is not convenient for people to test the next circuit board. Therefore, it is urgent to design an electrical test fixture for circuit boards to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an electrical test fixture for circuit boards to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An electrical test fixture for circuit boards includes a tester main body. A workbench is installed on one side of the top of the tester main body, and a workbench groove is opened at the top of the workbench. A cavity is opened at the bottom of the workbench, and a top outlet communicating with the cavity is opened at the middle position of the workbench groove. A support table is inserted into the inner wall of the top outlet, and the top surface of the support table is flush with the top surface of the workbench. A bottom plate is installed at the bottom of the cavity, and a plurality of second springs are installed between the top of the bottom plate and the bottom of the support table. A test plate is arranged above the workbench, and a support frame is installed on the tester main body. A pressing component for adjusting the height of the test plate is arranged on the support frame.

[0008] Further, the pressing assembly includes a mounting frame installed on one side of the support frame. One side of the mounting frame is rotatably connected to a handle through a pin shaft. Both sides of the bottom of one end of the handle are rotatably connected to a pressing plate through a pin shaft. A guide sleeve is fixed to the bottom of one side of the mounting frame. The bottom of the pressing plate is rotatably connected to a pressing column passing through the guide sleeve, and the bottom of the pressing column is installed on the test plate.

[0009] Further, mounting seats are fixed at the four corners of one side of the support frame, and guide rods are fixed between adjacent mounting seats. Two connecting sleeves sleeved on the guide rods are installed on the test plate.

[0010] Further, an activity groove is formed in the test plate, and the activity groove is continuously curved. A plurality of pulley sleeves are slidably arranged on the inner wall of the activity groove. T-shaped bushings are rotatably arranged on the inner walls of the pulley sleeves. Probes are installed on the inner walls of the T-shaped bushings, and a positioning assembly is arranged on the outer walls of the T-shaped bushings.

[0011] Further, the activity groove is located directly above the working groove, and the overall length and width of the activity groove are both greater than the length and width of the working groove.

[0012] Further, the positioning assembly includes a positioning pressing plate sleeved on the outer wall of the T-shaped bushing. A first spring is installed between one side of the top of the positioning pressing plate and the top of the T-shaped bushing. A lifting frame is installed on the other side of the top of the positioning pressing plate.

[0013] Further, a plurality of pressing plates are installed on the bottom of the test plate, and protection pads are installed on the bottoms of the pressing plates. The bottoms of the protection pads are flush with the bottoms of the probes.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] In the present utility model, the entire circuit board electrical test fixture is composed of the cooperation of a tester main body, a working table, a support table, a test plate, a probe, a support frame, a pressing assembly, a pressing plate, etc. The height of the test plate, the probe, the pressing plate, and the protection pad can be adjusted by the pressing assembly, which is convenient for pressing the circuit board into the working groove for detection, realizing the fixing operation of the circuit board.

[0016] In the present utility model, through the arrangement of the activity groove, the pulley sleeve, the T-shaped bushing, the probe, and the positioning assembly, the pulley sleeve can be moved to different areas of the activity groove through the relaxation and positioning effects of the positioning assembly, which is convenient for adjusting the position of the probe on the test plate, realizing the test operation on different positions of the circuit board, and improving the use range of the entire probe.

[0017] In the present utility model, through the arranged workbench, workbench groove, support platform, top outlet, bottom plate and second spring, when pressing the circuit board into the workbench groove, the height of the support platform can be pressed synchronously, so that the second spring contracts. After the test is completed, the support platform is driven to reset by the reset action of the second spring, which is convenient for ejecting the circuit board from the workbench groove, achieving the effect of facilitating the removal of the circuit board and facilitating the test of the next circuit board. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of a circuit board electrical test fixture.

[0019] Figure 2 It is a schematic diagram of the support frame and guide sleeve structure of a circuit board electrical test fixture.

[0020] Figure 3 It is a schematic diagram of the movable groove and pressing plate structure of a circuit board electrical test fixture.

[0021] Figure 4 It is a bottom view of the test board of a circuit board electrical test fixture.

[0022] Figure 5 It is a schematic diagram of the pulley sleeve and positioning pressing plate structure of a circuit board electrical test fixture.

[0023] Figure 6 It is a schematic diagram of the workbench and support platform structure of a circuit board electrical test fixture.

[0024] Figure 7 It is a sectional view of the workbench of a circuit board electrical test fixture.

[0025] Figure 8 It is a schematic diagram of the top outlet structure of a circuit board electrical test fixture.

[0026] In the figure: 1. Tester main body; 2. Workbench; 3. Test board; 4. Probe; 5. Handle; 6. Support frame; 7. Installation frame; 8. Pressing plate; 9. Guide sleeve; 10. Extrusion column; 11. Guide rod; 12. Connecting sleeve; 13. Installation seat; 14. Movable groove; 15. Pressing plate; 16. Protection pad; 17. Pulley sleeve; 18. T-shaped bushing; 19. First spring; 20. Lifting frame; 21. Positioning pressing plate; 22. Workbench groove; 23. Support platform; 24. Bottom plate; 25. Second spring; 26. Cavity; 27. Top outlet. Detailed Embodiment

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1 - 8 , in the embodiment of the present utility model, a circuit board electrical test fixture includes a tester main body 1. On one side of the top of the tester main body 1, a workbench 2 is installed. A workbench groove 22 is opened on the top of the workbench 2, and a cavity 26 is opened at the bottom of the workbench 2. A top outlet 27 communicating with the cavity 26 is opened at the middle position of the workbench groove 22. A support table 23 is inserted into the inner wall of the top outlet 27, and the top surface of the support table 23 is flush with the top surface of the workbench 2. A bottom plate 24 is installed at the bottom of the cavity 26, and a plurality of second springs 25 are installed between the top of the bottom plate 24 and the bottom of the support table 23. A test board 3 is arranged above the workbench 2. A plurality of pressing plates 15 are installed at the bottom of the test board 3, and a protection pad 16 is installed at the bottom of each pressing plate 15. The bottom of the protection pad 16 is flush with the bottom of the probe 4. A support frame 6 is installed on the tester main body 1, and a pressing component for adjusting the height of the test board 3 is arranged on the support frame 6. The pressing component includes a mounting frame 7 installed on one side of the support frame 6. One side of the mounting frame 7 is rotatably connected to a handle 5 through a pin shaft. Both sides of the bottom of one end of the handle 5 are rotatably connected to a pressing plate 8 through a pin shaft. A guide sleeve 9 is fixed at the bottom of one side of the mounting frame 7. The bottom of the pressing plate 8 is rotatably connected to a pressing column 10 passing through the guide sleeve 9. The bottom of the pressing column 10 is installed on the test board 3. By pressing the pressing plate 8 with the handle 5 in the pressing component, the heights of the pressing column 10, the test board 3, the probe 4, the pressing plate 15 and the protection pad 16 are adjusted, and the heights of the circuit board and the support table 23 are pressed, so that the second spring 25 contracts. After the test is completed, the pressing component is reset, and the support table 23 is driven to reset by the reset action of the second spring 25, facilitating the ejection of the circuit board from the workbench groove 22, achieving the effect of facilitating the removal of the circuit board and facilitating the test of the next circuit board.

[0029] Specifically, mounting seats 13 are fixed at the four corners of one side of the support frame 6, and guide rods 11 are fixed between adjacent two mounting seats 13. Two connecting sleeves 12 sleeved on the guide rods 11 are installed on the test board 3, and the stability performance of the test board 3 during lifting and lowering is maintained through the guiding action of the guide rods 11 and the connecting sleeves 12.

[0030] Specifically, an activity slot 14 is formed in the test board 3, and the activity slot 14 is continuously curved. A plurality of pulley sleeves 17 are slidably arranged on the inner wall of the activity slot 14. T-shaped bushings 18 are rotatably arranged on the inner walls of the pulley sleeves 17. Probes 4 are installed on the inner walls of the T-shaped bushings 18. A positioning component is arranged on the outer wall of the T-shaped bushing 18. The activity slot 14 is located directly above the station slot 22, and the overall length and width of the activity slot 14 are both greater than the length and width of the station slot 22. The positioning component includes a positioning pressing plate 21 sleeved on the outer wall of the T-shaped bushing 18. A first spring 19 is installed between one side of the top of the positioning pressing plate 21 and the top of the T-shaped bushing 18. A lifting frame 20 is installed on the other side of the top of the positioning pressing plate 21. By pulling the lifting frame 20 to separate the positioning pressing plate 21 from the top of the test board 3, the first spring 19 is compressed, and the pulley sleeve 17 can be moved to different areas of the activity slot 14, so that the probe 4 can be moved to different positions on the test board 3. Then, the lifting frame 20 is released, and the positioning pressing plate 21 is pressed on the test board 3 through the reset action of the first spring 19, so as to position the moved probe 4, realize the test operation on different positions of the circuit board, and improve the use range of the probe 4.

[0031] The working principle of the present utility model is as follows: When in use, the user places the circuit board on the support platform 23, presses the handle 5 in the pressing component to press the pressing plate 8, adjusts the heights of the extrusion column 10, the test board 3, the probe 4, the pressing plate 15 and the protection pad 16, so as to facilitate pressing the circuit board into the station slot 22 for detection. At this time, the height of the support platform 23 is synchronously pressed, so that the second spring 25 contracts. After the test is completed, the user resets the pressing component, and the support platform 23 is driven to reset through the reset action of the second spring 25, so as to facilitate ejecting the circuit board from the station slot 22 and taking out the circuit board. Moreover, the user pulls the lifting frame 20 in the positioning component to separate the positioning pressing plate 21 from the top of the test board 3, so that the first spring 19 is compressed, and the pulley sleeve 17 can be moved to different areas of the activity slot 14, so that the probe 4 can be moved to different positions on the test board 3. Then, the lifting frame 20 is released, and the positioning pressing plate 21 is pressed on the test board 3 through the reset action of the first spring 19, so as to position the moved probe 4 and realize the test operation on different positions of the circuit board.

[0032] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms.

Claims

1. A circuit board electrical test fixture, comprising a tester main body (1), characterized in that: On one side of the top of the tester main body (1), a workbench (2) is installed, and a workbench groove (22) is formed on the top of the workbench (2). A cavity (26) is formed at the bottom of the workbench (2), and a top outlet (27) communicating with the cavity (26) is formed at the middle position of the workbench groove (22). A support platform (23) is inserted into the inner wall of the top outlet (27), and the top surface of the support platform (23) is flush with the top surface of the workbench (2). A bottom plate (24) is installed at the bottom of the cavity (26), and a plurality of second springs (25) are installed between the top of the bottom plate (24) and the bottom of the support platform (23). A test plate (3) is arranged above the workbench (2), and a support frame (6) is installed on the tester main body (1). A pressing component for adjusting the height of the test plate (3) is arranged on the support frame (6).

2. The circuit board electrical test fixture according to claim 1, characterized in that: The pressing component includes a mounting frame (7) installed on one side of the support frame (6). One side of the mounting frame (7) is rotatably connected to a handle (5) through a pin shaft. Both sides of the bottom of one end of the handle (5) are rotatably connected to a pressing plate (8) through a pin shaft. A guide sleeve (9) is fixed at the bottom of one side of the mounting frame (7), and the bottom of the pressing plate (8) is rotatably connected to a pressing column (10) passing through the guide sleeve (9). The bottom of the pressing column (10) is installed on the test plate (3).

3. The circuit board electrical test fixture according to claim 2, wherein: Mounting seats (13) are fixed at the four corners of one side of the support frame (6), and a guide rod (11) is fixed between two adjacent mounting seats (13). Two connecting sleeves (12) sleeved on the guide rod (11) are installed on the test plate (3).

4. The circuit board electrical test fixture according to claim 3, characterized in that: An activity groove (14) is formed on the test plate (3), and the activity groove (14) is continuously curved. A plurality of pulley sleeves (17) slide on the inner wall of the activity groove (14). T-shaped bushings (18) are rotatably arranged on the inner walls of the pulley sleeves (17). Probes (4) are installed on the inner walls of the T-shaped bushings (18), and a positioning component is arranged on the outer walls of the T-shaped bushings (18).

5. The circuit board electrical measurement fixture according to claim 4, characterized in that: The activity groove (14) is located directly above the workbench groove (22), and the overall length and width of the activity groove (14) are both greater than the length and width of the workbench groove (22).

6. The circuit board electrical test fixture according to claim 5, wherein: The positioning component includes a positioning pressing plate (21) sleeved on the outer wall of the T-shaped bushing (18). A first spring (19) is installed between one side of the top of the positioning pressing plate (21) and the top of the T-shaped bushing (18). A lifting frame (20) is installed on the other side of the top of the positioning pressing plate (21).

7. The circuit board electrical test fixture according to claim 4, characterized in that: A plurality of pressing plates (15) are installed at the bottom of the test plate (3), and protective pads (16) are installed at the bottoms of the pressing plates (15). The bottoms of the protective pads (16) are flush with the bottoms of the probes (4).

Images