PCBA test fixture

Abstract

The utility model discloses a PCBA (Printed Circuit Board Assembly) test fixture in the technical field of PCBA test, and aims to solve the problems of insufficient positioning accuracy, poor adaptability, insufficient clamping stability, damage to the surface of a PCB (Printed Circuit Board) and the like in the prior art. The jig comprises a jig body, a pressing and fixing mechanism and a clamping and fixing mechanism. The top side of the tool body is provided with a test groove used for placing a PCBA. The hold-down fixing mechanism effectively absorbs vibration and impact through the combined design of an electric push rod and a hold-down air cushion in combination with a spring and a shock absorber, and it is ensured that the PCBA is kept stable in the testing process; according to the clamping and fixing mechanism, a bidirectional threaded rod is matched with a servo motor, accurate movement of a clamping rod is achieved, PCBs of different sizes and shapes are rapidly adapted, and the positioning accuracy and adaptability are improved. By optimizing the clamping and positioning structure and the damping design, the performance of the PCBA test fixture is remarkably improved, and the PCBA test fixture has the advantages of high-precision positioning, high adaptability, stable clamping, PCB protection, convenience in operation and the like.

Description

Technical Field

[0001] This utility model relates to the field of PCBA testing technology, specifically a PCBA testing fixture. Background Technology

[0002] With the rapid development of the electronics manufacturing industry, PCBA (Printed Circuit Board Assembly), as a core component of electronic devices, has become particularly important in terms of production efficiency and quality control. PCBA test fixtures, as key tools to ensure PCBA performance and quality, are widely used in various testing stages of the electronics manufacturing process. However, existing PCBA test fixtures have many problems in practical applications, especially in terms of clamping and positioning.

[0003] Existing PCBA test fixtures typically use fixed locating pins or mechanical clamps to position and hold PCBs. This design struggles to meet the positioning requirements of small-sized PCBs with high precision, easily leading to poor contact between test points and probes, affecting the accuracy of test results. Furthermore, PCBs of different sizes and shapes require customized fixture modules, increasing production costs and extending changeover time. In addition, existing clamping devices lack effective shock absorption and cushioning designs during testing, making the PCB prone to displacement due to vibration or external forces, resulting in unstable testing. Moreover, the use of rigid materials can easily cause scratches or damage to the PCB surface during clamping, affecting the PCB's appearance and performance.

[0004] To address the aforementioned issues, this application provides a PCBA test fixture. Utility Model Content

[0005] The purpose of this utility model is to provide a PCBA test fixture in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A PCBA test fixture includes a fixture body, a pressing and fixing mechanism, and a clamping and fixing mechanism, wherein:

[0008] The top side of the fixture body has a test slot for placing PCBA;

[0009] The pressing and fixing mechanism is installed on the fixture body and is used to press the PCBA inside the test slot;

[0010] The clamping and fixing mechanism is installed on the fixture body and is used to clamp the opposite sides of the PCBA.

[0011] Furthermore, the pressing and fixing mechanism includes a mounting bracket fixed to the top of the fixture body, an electric push rod with its output end pointing vertically downward and corresponding to the test slot is mounted on the mounting bracket, a connecting plate is fixed to the output end of the electric push rod, and a pressing air cushion is mounted on the bottom of the connecting plate.

[0012] Furthermore, a vertical spring is connected between the two opposing inner walls of the pressure cushion.

[0013] Furthermore, a vertical shock absorber is connected between the two opposing inner walls of the pressure cushion, and the spring is fitted onto the shock absorber.

[0014] Furthermore, the top side of the fixture body has two sliding grooves, both of which are connected to the test slot. The two sliding grooves are symmetrically arranged and located on opposite sides of the test slot. The clamping and fixing mechanism includes a bidirectional threaded rod that is horizontally rotatably mounted on the top of the fixture body. Two connecting rods are threaded onto the bidirectional threaded rod. The two connecting rods are respectively threaded onto the positive thread and the negative thread of the bidirectional threaded rod. Clamping rods are fixed on both connecting rods. The two clamping rods are slidably mounted inside the two sliding grooves. Rubber pads are fixed on opposite sides of the two clamping rods. A servo motor with its output end fixed to one end of the bidirectional threaded rod is mounted on the top of the fixture body.

[0015] Furthermore, a device groove is constructed on the bottom wall of the test groove, and a push plate is movably arranged inside the device groove. A spring is connected between the push plate and the inner wall of the device groove.

[0016] Furthermore, four rectangularly distributed shock absorbers are installed at the bottom of the fixture body, and a pad is fixed at the bottom end of each shock absorber. A spring is connected between the pad and the bottom side of the fixture body.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This solution achieves precise movement of the clamping rod through the cooperation of a bidirectional threaded rod and a servo motor, enabling it to quickly adapt to PCBs of different sizes and shapes, significantly improving positioning accuracy and adaptability, and reducing testing errors caused by size differences.

[0019] In this solution, the holding and fixing mechanism adopts a combination design of electric push rod and holding air cushion, combined with spring and shock absorber, to effectively absorb the vibration and impact generated during the test, ensuring that the PCB board remains stable during the test and avoiding displacement or poor contact caused by vibration.

[0020] In this solution, a rubber pad is installed on the clamping rod, and a flexible material is used in conjunction with the spring to reduce scratches and damage to the PCB board surface, thus protecting the appearance and performance of the PCB board.

[0021] The push plate and spring design in this solution allow the PCB board to be pushed out of the test slot after the test is completed, making it easy to remove and replace. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This utility model Figure 1 A three-dimensional sectional view;

[0024] Figure 3 This utility model Figure 2 An enlarged view of structure A in the middle;

[0025] Figure 4 This utility model Figure 1 A three-dimensional sectional view from another direction;

[0026] Figure 5 This is a three-dimensional structural diagram of another state of the present invention.

[0027] In the diagram: 1. Fixture body; 11. Test slot; 12. Slide groove; 13. Device slot; 14. Push plate; 15. Spring II; 16. Shock absorber II; 17. Pad plate; 18. Spring III; 2. Holding and fixing mechanism; 21. Mounting bracket; 22. Electric push rod; 23. Connecting plate; 24. Holding air cushion; 241. Spring I; 242. Shock absorber I; 3. Clamping and fixing mechanism; 31. Bidirectional threaded rod; 32. Connecting rod; 33. Clamping rod; 34. Rubber pad; 35. Servo motor. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0029] This application provides a PCBA test fixture, primarily addressing the shortcomings of existing PCBA test fixtures that typically employ fixed locating pins or mechanical clamps for PCB board positioning and clamping. This design struggles to meet the positioning requirements of high-precision PCBs with their minute dimensions, easily leading to poor contact between test points and probes, thus affecting the accuracy of test results. Furthermore, PCBs of different sizes and shapes require customized clamping modules, increasing production costs and extending changeover time. Additionally, existing clamping devices lack effective shock absorption and cushioning designs during testing, making the PCB board prone to displacement due to vibration or external forces, resulting in unstable testing. Moreover, the use of rigid materials can easily cause scratches or damage to the PCB board surface during clamping, affecting its appearance and performance. The application provides the following technical solution, which will be discussed in conjunction with… Figures 1-5 Please provide a detailed explanation:

[0030] A PCBA test fixture mainly includes a fixture body 1, a pressing and fixing mechanism 2, and a clamping and fixing mechanism 3, wherein:

[0031] The top side of the fixture body 1 has a test slot 11 for accurately placing the PCBA to be tested, ensuring that the PCBA is in an accurate position during the test.

[0032] The pressing and fixing mechanism 2 is installed on the fixture body 1. Its core function is to firmly press the PCBA inside the test slot 11 to prevent the PCBA from shifting during the test, thereby ensuring the accuracy of the test results.

[0033] The clamping and fixing mechanism 3 is installed on the fixture body 1. Its function is to firmly clamp the opposite sides of the PCBA, further enhancing the stability of the PCBA during the testing process.

[0034] Through the synergistic effect of the above-mentioned structure, this utility model not only improves the accuracy and stability of PCBA testing, but also effectively protects the PCB board, reduces production costs, and improves production efficiency, providing the electronics manufacturing industry with an efficient and stable PCBA testing solution.

[0035] For details, please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5The holding and fixing mechanism 2 includes a mounting bracket 21 fixed to the top of the fixture body 1, which provides a solid foundation for the entire holding system. An electric push rod 22 with its output end pointing vertically downward and corresponding to the test slot 11 is installed on the mounting bracket 21 to ensure that the holding force can be accurately applied to the PCBA. A connecting plate 23 is fixed to the output end of the electric push rod 22. A holding air cushion 24 is installed at the bottom of the connecting plate 23. The design of the holding air cushion 24 allows the pressure to be applied evenly and gently to the PCB board, avoiding damage to the PCB board due to uneven pressure.

[0036] A vertical spring 241 is connected between the two opposing inner walls of the pressure-holding air pad 24; a vertical shock absorber 242 is connected between the two opposing inner walls of the pressure-holding air pad 24, and the spring 241 is sleeved on the shock absorber 242. This structural design enables the pressure-holding air pad 24 to effectively buffer and absorb the vibration and impact generated during the test while applying pressure, ensuring that the PCBA remains stable during the test and avoiding displacement or poor contact caused by vibration.

[0037] In actual operation, after the PCB board is placed in the test slot 11, the electric push rod 22 is activated. Its output end drives the connecting plate 23 and the holding air pad 24 to move downward, pressing the PCB board tightly in the test slot 11. The flexible contact surface of the holding air pad 24 is in close contact with the PCB board, while the internal spring 241 and shock absorber 242 work together to absorb external vibrations and ensure the smooth progress of the test. After the test is completed, the electric push rod 22 is reset, and the holding air pad 24 is lifted, which facilitates quick replacement of the PCB board and improves test efficiency.

[0038] Furthermore, the clamping and fixing mechanism 3 is ingeniously designed to quickly adapt to PCBs of different sizes, while ensuring stability and protection during testing. Please refer to [link / reference needed]. Figure 2 , Figure 3 , Figure 4 and Figure 5 The top side of the fixture body 1 has two sliding grooves 12, both of which are connected to the test groove 11. The two sliding grooves 12 are symmetrically arranged and located on opposite sides of the test groove 11. The clamping and fixing mechanism 3 includes a bidirectional threaded rod 31 that is horizontally rotatably mounted on the top of the fixture body 1. Two connecting rods 32 are threaded on the bidirectional threaded rod 31. The two connecting rods 32 are respectively threaded on the positive thread and the negative thread of the bidirectional threaded rod 31. A clamping rod 33 is fixed on each of the two connecting rods 32. The two clamping rods 33 are slidably mounted inside the two sliding grooves 12 to ensure that the clamping rods 33 can move smoothly along the sliding grooves 12. A rubber pad 34 is fixed on the opposite side of each of the two clamping rods 33. The rubber pad 34 can reduce scratches and damage to the PCB board surface. A servo motor 35 with its output end fixed to one end of the bidirectional threaded rod 31 is installed on the top of the fixture body 1.

[0039] In actual operation, after the PCB board is placed in the test slot 11, the servo motor 35 is started, and the bidirectional threaded rod 31 rotates, driving the two connecting rods 32 to move along the positive and negative threads respectively. The connecting rods 32 drive the clamping rod 33 to slide in the slide groove 12, realizing synchronous clamping of both sides of the PCB board. The rubber pad 34 contacts the surface of the PCB board, providing a gentle clamping force to avoid damage to the PCB board. After the test, the servo motor 35 rotates in the reverse direction, and the bidirectional threaded rod 31 drives the clamping rod 33 to reset, which facilitates quick replacement of the PCB board and improves test efficiency.

[0040] Furthermore, a device groove 13 is constructed on the bottom wall of the test groove 11, and a push plate 14 is movably arranged inside the device groove 13. A spring 15 is connected between the push plate 14 and the inner wall of the device groove 13.

[0041] In actual operation, when the PCB board is placed in the test slot 11 for testing, the push plate 14 is kept in a retracted state under the action of the second spring 15, ensuring that the PCB board can be placed stably in the test slot 11. After the test is completed, the pressing and fixing mechanism 2 and the clamping and fixing mechanism 3 are reset. At this time, the elastic force of the second spring 15 pushes the push plate 14 to move upward, pushing the PCB board out of the test slot 11, which makes it easy for operators to quickly take out and replace the PCB board, significantly improving the testing efficiency.

[0042] This design not only simplifies the PCB board removal process but also avoids scratches or damage to the PCB board surface that may be caused by manual handling, further improving the protective performance of the fixture. Through the synergistic effect of the device slot 13 and the push plate 14, this utility model optimizes the operation process while ensuring test stability and accuracy, providing an efficient and convenient PCBA testing solution for the electronics manufacturing industry.

[0043] Furthermore, four rectangularly distributed shock absorbers 16 are installed at the bottom of the fixture body 1. A pad 17 is fixed at the bottom end of the shock absorber 16, and a spring 18 is connected between the pad 17 and the bottom side of the fixture body 1.

[0044] Shock absorbers 16 are evenly distributed at the bottom of the fixture body 1, forming a stable support structure that can effectively absorb vibrations and impacts from the ground or workbench, reducing interference from external factors in the testing process. The pad 17 not only fixes the shock absorbers 16, but also further disperses pressure, ensuring that the fixture remains stable during placement and use. Spring 18 is connected between the pad 17 and the bottom side of the fixture body 1, providing additional elastic support, enhancing the shock absorption effect, and ensuring the stability of the testing environment.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A PCBA test fixture, comprising a fixture body (1), a pressing and fixing mechanism (2), and a clamping and fixing mechanism (3), characterized in that, in: The top side of the fixture body (1) has a test slot (11) for placing PCBA. The pressing and fixing mechanism (2) is installed on the fixture body (1) and is used to press the PCBA inside the test slot (11); The clamping and fixing mechanism (3) is installed on the fixture body (1) and is used to clamp the opposite sides of the PCBA.

2. The PCBA test fixture according to claim 1, characterized in that: The pressing and fixing mechanism (2) includes a mounting bracket (21) fixed on the top of the fixture body (1). An electric push rod (22) with its output end pointing vertically downward and corresponding to the test slot (11) is mounted on the mounting bracket (21). A connecting plate (23) is fixed on the output end of the electric push rod (22). A pressing air cushion (24) is installed at the bottom of the connecting plate (23).

3. A PCBA test fixture according to claim 2, characterized in that: A vertical spring (241) is connected between the two opposing inner walls of the pressure cushion (24).

4. A PCBA test fixture according to claim 3, characterized in that: A vertical shock absorber (242) is connected between the two inner walls of the pressure cushion (24), and a spring (241) is sleeved on the shock absorber (242).

5. A PCBA test fixture according to claim 1, characterized in that: The top side of the fixture body (1) has two sliding grooves (12) that are connected to the test groove (11). The two sliding grooves (12) are symmetrically arranged and located on opposite sides of the test groove (11). The clamping and fixing mechanism (3) includes a bidirectional threaded rod (31) that is horizontally rotatably installed on the top of the fixture body (1). Two connecting rods (32) are threaded on the bidirectional threaded rod (31). The two connecting rods (32) are respectively threaded on the positive thread and the negative thread of the bidirectional threaded rod (31). Clamping rods (33) are fixed on the two connecting rods (32). The two clamping rods (33) are slidably installed inside the two sliding grooves (12). Rubber pads (34) are fixed on opposite sides of the two clamping rods (33). A servo motor (35) with its output end fixed to one end of the bidirectional threaded rod (31) is installed on the top of the fixture body (1).

6. A PCBA test fixture according to claim 1, characterized in that: The bottom wall of the test tank (11) is provided with a device tank (13), and a push plate (14) is movably arranged inside the device tank (13). A spring (15) is connected between the push plate (14) and the inner wall of the device tank (13).

7. A PCBA test fixture according to claim 1, characterized in that: The bottom of the fixture body (1) is equipped with four rectangular shock absorbers (16), and the bottom end of the shock absorber (16) is fixed with a pad (17). A spring (18) is connected between the pad (17) and the bottom side of the fixture body (1).

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