Circuit board test fixture

Abstract

The utility model belongs to the technical field of circuit board testing, and particularly discloses a circuit board testing jig which comprises a testing table, the top of the testing table is fixedly connected with a sliding rod, the outer surface of the sliding rod is movably sleeved with a spring, and the outer surface of the sliding rod is slidably connected with a circuit board body. A manual pressing mechanism is arranged on the front end face of the testing table, and a dust blowing mechanism used for cleaning dust on the surface of the circuit board body is arranged on the testing table. According to the circuit board test fixture, the probe can move downwards against the circuit board body through the manual pressing mechanism, the circuit board body compresses the spring while sliding down along the sliding rod, and reverse buffering force is formed through the spring, so that impact caused by direct physical contact between the probe and the circuit board body can be reduced; the mechanical damage risk of the surface of the circuit board is reduced, the stability of the circuit board in the testing process is ensured, and the testing reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit board testing, and in particular to a circuit board testing fixture. Background Art

[0002] Circuit board testing is a key step in the production of electronic devices, which aims to ensure that the function and performance of the circuit board meet the design requirements, and the circuit board test fixture is a tool or fixture used to support circuit board testing to adapt to the layout and component position of the circuit board to be tested.

[0003] The design of existing circuit board test fixtures is relatively complex. Most of them clamp the circuit board directly and rigidly, which can easily cause certain mechanical damage to the surface of the circuit board at the moment of clamping. In addition, dust may accumulate on the surface of the circuit board during clamping. The dust can easily cause the components, connectors or solder joints on the circuit board to be contaminated, affecting the accuracy of the test and even damaging the circuit board. Utility Model Content

[0004] In view of this, the purpose of the present invention is to solve the shortcomings of the background technology and to provide a circuit board testing fixture to solve the problems in the prior art.

[0005] To achieve the above objectives, the utility model provides a circuit board testing fixture, including a test bench, a sliding rod is fixedly connected to the top of the test bench, a spring is provided on the outer surface of the sliding rod, a circuit board body is slidably connected to the outer surface of the sliding rod, a manual pressing mechanism is provided on the front end surface of the test bench, and a dust blowing mechanism is provided on the test bench for cleaning dust on the surface of the circuit board body.

[0006] Preferably, the manual pressing mechanism includes a fixing frame fixedly mounted on the front end surface of the test bench, and a frame shaft is fixedly penetrated through the inner side of the fixing frame. The position of the pressure plate can be moved downward by the manual pressing mechanism, so that the probe is pressed against the circuit board body until it is in a stable test state.

[0007] Preferably, the outer surface of the frame shaft is rotatably connected to a push rod, and the outer surface of the push rod is rotatably connected to a connecting frame.

[0008] Preferably, a pressure rod is rotatably connected to the bottom end of the coupling frame, an outer surface of the pressure rod is slidably connected to an inner surface of the fixing frame, a pressure plate is fixedly connected to the bottom of the pressure rod, and a probe is provided at the bottom of the pressure plate.

[0009] Preferably, the dust blowing mechanism includes a fixed table fixedly connected to the top of the test bench, the outer surface of the fixed table is fixedly connected to a damping shaft, and the outer surface of the damping shaft is rotatably connected to a turntable. The dust blowing mechanism can be used to blow away dust and other impurities on the surface of the circuit board body to avoid dust accumulation affecting the accuracy of the test.

[0010] Preferably, an air pump is fixedly provided on the inner side of the turntable, a dust blowing gun is provided at the output end of the air pump, and a fine gun nozzle is provided at the output end of the dust blowing gun. The design of the fine gun nozzle can facilitate fine adjustment of the angle in a small space.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The circuit board test fixture can move the probe downward against the circuit board body through a manual pressing mechanism. The circuit board body will slide down along the slide bar while compressing the spring. The spring forms a reverse buffer force, which can reduce the impact caused by direct physical contact between the probe and the circuit board body, help reduce the risk of mechanical damage to the circuit board surface, ensure the stability of the circuit board during the test, and improve the reliability of the test.

[0013] 2. The circuit board test fixture uses an air pump to supply air to the dust blow gun, allowing the dust blow gun to spray the airflow through the fine gun nozzle to the surface of the circuit board body. At the same time, the turntable is rotated along the damping axis to adjust the angle of the fine gun nozzle to fully clean the surface of the circuit board, avoid dust accumulation affecting the accuracy of the test, and reduce the damage to the circuit board during the clamping stabilization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of this application;

[0015] Figure 2 This is a schematic diagram of the surface structure of the fixing frame of this application;

[0016] Figure 3 This is a schematic diagram of the surface structure of the dust blowing gun of this application.

[0017] Among them: 1. test bench; 2. sliding rod; 3. spring; 4. circuit board body; 5. fixed frame; 6. frame shaft; 7. pressure lever; 8. connecting frame; 9. pressure rod; 10. pressure plate; 11. probe; 12. fixed table; 13. damping shaft; 14. turntable; 15. air pump; 16. dust blow gun; 17. fine gun nozzle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] See also Figure 1-3A circuit board test fixture comprises a test bench 1, a slide bar 2 is fixedly connected to the top of the test bench 1, a spring 3 is provided on the outer surface of the slide bar 2, a circuit board body 4 is slidably connected to the outer surface of the slide bar 2, a manual pressing mechanism is provided on the front end surface of the test bench 1, and a dust blowing mechanism for cleaning dust on the surface of the circuit board body 4 is provided on the test bench 1.

[0020] Through the above technical solution, when the device is in use, the manual pressing mechanism can allow the probe 11 to press against the circuit board body 4, so that it slides down along the surface of the slide rod 2 while compressing the spring 3, so as to reduce the damage to the circuit board body 4 caused by instantaneous pressure. In combination with the dust blowing mechanism, it can effectively protect the circuit board body 4.

[0021] Specifically, the manual pressing mechanism includes a fixing frame 5 fixedly mounted on the front end surface of the test bench 1 , and a frame shaft 6 is fixedly penetrated through the inner side of the fixing frame 5 .

[0022] Through the above technical solution, the push lever 7 can rotate along the frame shaft 6 after being pressed, and at the same time move downward through the connection with the connecting frame 8.

[0023] Specifically, the outer surface of the frame shaft 6 is rotatably connected to the push rod 7 , and the outer surface of the push rod 7 is rotatably connected to the connecting frame 8 .

[0024] Through the above technical solution, the top and the bottom of the coupling frame 8 can rotate along the push rod 7 and the pressure rod 9 respectively to cooperate with the pressure rod 9 to move longitudinally.

[0025] Specifically, the bottom end of the coupling frame 8 is rotatably connected to a pressure rod 9, the outer surface of the pressure rod 9 is slidably connected to the inner surface of the fixed frame 5, the bottom of the pressure rod 9 is fixedly connected to a pressure plate 10, and a probe 11 is provided at the bottom of the pressure plate 10.

[0026] Through the above technical solution, when the pressing plate 10 drives the probe 11 to press against the circuit board body 4 and move downward, the circuit board body 4 will compress the spring 3.

[0027] Specifically, the dust blowing mechanism includes a fixed platform 12 fixedly connected to the top of the test platform 1 , a damping shaft 13 is fixedly connected to the outer surface of the fixed platform 12 , and a turntable 14 is rotatably connected to the outer surface of the damping shaft 13 .

[0028] Through the above technical solution, the turntable 14 will remain relatively stable after rotating to a corresponding position along the damping shaft 13, thereby linking the dust blowing gun 16 to adjust the angle.

[0029] Specifically, an air pump 15 is fixedly provided on the inner side of the turntable 14 , a dust blowing gun 16 is provided at the output end of the air pump 15 , and a fine gun nozzle 17 is provided at the output end of the dust blowing gun 16 .

[0030] Through the above technical solution, the fine gun nozzle 17 can be accurately adjusted to the position facing the dust on the circuit board body 4 after adjusting the angle, and the downward pressing design of the end of the fine gun nozzle 17 is also to facilitate the adjustment of the airflow injection angle.

[0031] Working principle: When the device is in use, the circuit board body 4 is firstly sheathed along the surface of the slide bar 2 to prevent the circuit board body 4 from being lateral deflected. Then, the air pump 15 is used to supply air to the dust blowing gun 16, so that the dust blowing gun 16 sprays the airflow through the fine gun nozzle 17 to the surface of the circuit board body 4, and the dust and other impurities on the surface are cleaned by wind to prevent dust accumulation from affecting the accuracy of the test, and at the same time reduce the damage to the circuit board caused by the clamping stabilization process. During this process, the turntable 14 can be rotated along the damping shaft 13 to adjust the angle of the fine gun nozzle 17 so that it can fully clean the surface of the circuit board. Finally, the push lever 7 is pressed to rotate along the frame shaft 6, and the push lever 7 is pressed. The downward pressure will drive the coupling frame 8 to move downward synchronously, thereby causing the pressure rod 9 to pass through the inner surface of the fixing frame 5 and slide down steadily. During this process, the pressure plate 10 will drive the probe 11 to move downward synchronously until the probe 11 presses against the circuit board body 4 and makes it slide down along the surface of the slide rod 2. At this time, the spring 3 will be gradually compressed, and the spring 3 will form a reverse buffering force, which can reduce the impact caused by the direct physical contact between the probe 11 and the circuit board body 4, and help reduce the risk of mechanical damage to the surface of the circuit board, especially at the moment of clamping. By alleviating the impact at the moment of clamping, the stress on the components or connectors on the circuit board can be reduced, which helps to ensure the stability of the circuit board during the test and improve the reliability of the test.

[0032] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A circuit board test fixture, comprising a test bench (1), characterized in that: The top of the test bench (1) is fixedly connected to a slide bar (2), a spring (3) is movably sleeved on the outer surface of the slide bar (2), a circuit board body (4) is slidably connected to the outer surface of the slide bar (2), a manual pressing mechanism is provided on the front end surface of the test bench (1), and a dust blowing mechanism for cleaning dust on the surface of the circuit board body (4) is provided on the test bench (1).

2. A circuit board test fixture according to claim 1, characterized in that: The manual pressing mechanism comprises a fixing frame (5) fixedly mounted on the front end surface of the test bench (1), and a frame shaft (6) is fixedly penetrated through the inner side of the fixing frame (5).

3. A circuit board test fixture according to claim 2, characterized in that: The outer surface of the frame shaft (6) is rotatably connected to a push rod (7), and the outer surface of the push rod (7) is rotatably connected to a connecting frame (8).

4. A circuit board test fixture according to claim 3, characterized in that: The bottom end of the coupling frame (8) is rotatably connected to a pressure rod (9), the outer surface of the pressure rod (9) is slidably connected to the inner surface of the fixed frame (5), the bottom of the pressure rod (9) is fixedly connected to a pressure plate (10), and a probe (11) is provided at the bottom of the pressure plate (10).

5. A circuit board test fixture according to claim 1, characterized in that: The dust blowing mechanism comprises a fixed platform (12) fixedly connected to the top of the test bench (1), the outer surface of the fixed platform (12) is fixedly connected to a damping shaft (13), and the outer surface of the damping shaft (13) is rotatably connected to a turntable (14).

6. A circuit board test fixture according to claim 5, characterized in that: An air pump (15) is fixedly provided on the inner side of the turntable (14), a dust blowing gun (16) is provided at the output end of the air pump (15), and a fine gun nozzle (17) is provided at the output end of the dust blowing gun (16).

Images