A fixture for on-board electrical testing of a circuit board

Abstract

The utility model discloses a kind of clamps for circuit board power-on test, it is related to circuit board power-on test technical field, and it includes: placing plate, suction disc is fixedly installed in the lower surface four corners of placing plate, bottom plate is fixedly installed in the upper surface central of placing plate, mounting rod is fixedly installed in the upper surface central of bottom plate.The utility model is limited by the setting of mechanism, it is cooperated by the installation groove of mounting rod both ends, fixed seat, sliding rod and limit spring, can drive sliding seat flexible sliding, and then by means of cross bar, mounting seat drive fixed plate dynamic adjustment clamping range, can easily adapt to circuit board of different size, thickness, without for specific specification circuit board separately replacing clamp, greatly improve the versatility and detection efficiency of clamp;Meanwhile, limit spring, which is equidistantly distributed at the bottom end of the fixed plate, can form uniform and stable multi-point clamping on the circuit board through elastic pressure, effectively avoiding deformation or displacement of the circuit board due to uneven local stress.

Description

Technical Field

[0001] This utility model relates to the field of circuit board power-on testing technology, and specifically to a fixture for circuit board power-on testing. Background Technology

[0002] A circuit board, or printed circuit board, is an electronic component that uses an insulating substrate as a base and forms conductive circuit patterns on its surface or inside through processes such as etching and printing. It is used to carry and fix electronic components (such as chips, resistors, and capacitors) and realize the electrical connection between them. Its core function is to replace the traditional manual soldering of wires, making the connection of electronic components more compact and reliable, while reducing the size and cost of circuits. It is the "circuit skeleton" of most electronic devices (such as mobile phones, computers, and home appliances).

[0003] When testing circuit boards, users usually place the circuit board on a table and then test it with a testing device. However, the circuit board may shift during the test, which can lead to unstable contact and inaccurate test results. Therefore, designing a new fixture for testing circuit boards is a technical problem that engineers need to solve. Utility Model Content

[0004] The purpose of this invention is to provide a fixture for electrical testing on circuit boards, so as to solve the problems in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A fixture for electrical testing of circuit boards includes: a placement plate, suction cups fixedly installed at the four corners of the lower surface of the placement plate, a base plate fixedly installed at the center of the upper surface of the placement plate, a mounting rod fixedly installed at the center of the upper surface of the base plate, a limiting mechanism slidably connected to both ends of the mounting rod, a circuit board placed on the upper surface of the base plate, and the circuit board and the limiting mechanism engaging with each other, and a testing device for testing the circuit board fixedly installed on one side of the placement plate; the limiting mechanism includes mounting grooves formed at both ends of the mounting rod, a fixed seat fixedly installed at one end of the inner wall of the mounting groove, a sliding rod fixedly installed at one end of the fixed seat, a limiting spring sleeved on the outer ring of the sliding rod, and a sliding seat slidably connected to the end of the sliding rod away from the fixed seat, and the sliding seat slidably connected inside the mounting groove.

[0007] Using the above technical solution, when performing power-on testing on a circuit board, the operator first places the circuit board to be tested stably on the base plate, and then uses the limiting mechanisms at both ends of the mounting rod to clamp and restrict the circuit board. This limiting mechanism can be dynamically adjusted through the cooperation of the sliding rod, the limiting spring, and the sliding seat, which can flexibly adapt to circuit boards of different sizes. This ensures the effectiveness of clamping and eliminates the need to change the fixtures separately for different specifications of circuit boards, improving the versatility and efficiency of testing. At the same time, the limiting mechanism contacts the circuit board through the limiting spring with a hard rubber pad under the fixing plate. This avoids scratches on the surface of the circuit board and damage to the solder joints, while providing a stable clamping force for the circuit board. This effectively prevents the circuit board from shifting due to vibration or external forces during testing, ensuring stable contact between the testing device and the test points on the circuit board. This significantly reduces test errors caused by poor contact and further improves the stability, accuracy, and safety of power-on testing of circuit boards.

[0008] A further improvement of this utility model is that a pad for placing the circuit board is provided on the upper surface of the base plate.

[0009] By adopting the above technical solution, the pad can increase the stability of the circuit board placement.

[0010] A further improvement of the present invention is that the limiting mechanism also includes guide grooves at both ends of the mounting rod, a crossbar is slidably connected inside the guide groove, and the crossbar is fixedly connected to the sliding seat. The two ends of the crossbar extend to the outside of the sliding seat and are fixedly mounted on mounting seats. A fixing plate for pressing down and limiting the circuit board is installed on one side of the mounting seat.

[0011] Using the above technical solution, when performing the limiting clamping operation on the circuit board, the operator first pushes the mounting base and the fixed plate connected to it, allowing them to slide smoothly along the guide groove. This quickly opens the space on the base plate for placing the circuit board. During this process, the limiting spring is compressed. Then, the operator places the circuit board to be tested in the designated area on the base plate. After placement, the operator releases the external force limiting the mounting base and the fixed plate. At this time, the sliding base will automatically reset under the rebound force of the limiting spring, thereby driving the mounting base and the fixed plate to move synchronously towards the circuit board. Finally, the fixed plate forms a stable clamp on the circuit board. The entire operation process does not require additional tools, relying on the spring force to achieve automatic reset clamping. This not only improves the convenience and efficiency of circuit board fixing but also limits its position, effectively preventing circuit board misalignment caused by equipment vibration or accidental contact during testing. It ensures that the circuit board test points and the testing device always maintain precise alignment, providing a reliable guarantee for the accuracy of power-on testing.

[0012] A further improvement of this utility model is that a pull rod for pulling the sliding seat is fixedly installed at the top of the sliding seat.

[0013] By adopting the above technical solution, the pull rod at the top of the sliding seat facilitates the pulling of the mounting seat and the fixing plate. Applying force to pull between the two mounting seats can increase the stability of the limiting mechanism during use.

[0014] A further improvement of this utility model is that: a plurality of placement slots are provided at equal intervals at the bottom end of the fixing plate, a fixing rod is fixedly installed inside the placement slot, an installation sleeve is fixedly installed on the fixing rod, and a limiting spring for restricting the circuit board is fixedly installed at the bottom end of the installation sleeve.

[0015] To further optimize the adaptability and limiting effect of the limiting mechanism on circuit boards of different sizes, the fixture has several placement slots equidistantly opened at the bottom of the fixing plate. Mounting sleeves are securely installed in the slots via fixing rods, and the bottom of the mounting sleeves is specially equipped with limiting springs to apply elastic restraint to the circuit board surface. The equidistantly distributed placement slots allow the limiting springs to act evenly on the circuit board surface. Even when facing circuit boards with large size differences, a stable limiting force can be formed through multi-point elastic clamping, avoiding deformation or displacement of the circuit board due to uneven local force. At the same time, the elastic characteristics of the limiting springs can flexibly adapt to slight undulations on the circuit board surface, allowing for a tight fit without manual pressure adjustment. This improves compatibility with circuit boards of different thicknesses and edge shapes, and avoids squeezing damage to components and solder joints on the circuit board surface caused by rigid clamping.

[0016] A further improvement of this utility model is that a hard rubber pad is fixedly installed at the bottom end of the limiting spring.

[0017] By adopting the above technical solution, the hard rubber pad set at the bottom of the limiting spring can protect the circuit board when the limiting mechanism restricts it, avoiding damage to the circuit board caused by hard contact, and further improving the safety of the circuit board during testing.

[0018] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0019] This invention, through the design of a limiting mechanism, utilizes the mounting grooves at both ends of the mounting rod, the fixed seat, the sliding rod, and the limiting spring to drive the sliding seat to slide flexibly. This, in turn, uses the crossbar and mounting seat to drive the fixed plate to dynamically adjust the clamping range, easily adapting to circuit boards of different sizes and thicknesses. This eliminates the need to replace the clamps for specific circuit boards, significantly improving the versatility and testing efficiency of the clamps. Simultaneously, the equally spaced limiting springs at the bottom of the fixed plate create a uniform and stable multi-point clamping effect on the circuit board through elastic pressure, effectively preventing deformation or displacement due to uneven local stress. The hard rubber pads at the bottom of the limiting springs isolate direct hard contact between metal components and the circuit board, preventing scratches on the circuit board surface and damage to components or solder joints, ensuring the integrity of the circuit board. This simplifies the operation process and ensures that the circuit board remains precisely aligned with the testing end of the testing device during testing, avoiding misalignment caused by vibration or accidental contact, significantly reducing testing errors, and providing reliable assurance for the stability, accuracy, and safety of circuit board power-on testing. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a first-person perspective schematic diagram of the overall device structure of this utility model;

[0022] Figure 2 This is a second-view schematic diagram of the overall device structure of this utility model;

[0023] Figure 3 This is a partial structural schematic diagram of the present invention;

[0024] Figure 4 This is a first-person perspective schematic diagram of the limiting mechanism structure of this utility model;

[0025] Figure 5 This is a second-view schematic diagram of the limiting mechanism structure of this utility model;

[0026] Figure 6 This is a third-person perspective view of the limiting mechanism structure of this utility model.

[0027] In the diagram: 1. Placement plate; 2. Suction cup; 3. Base plate; 4. Mounting rod; 5. Restriction mechanism; 6. Circuit board; 7. Test device; 8. Mounting slot; 9. Fixing seat; 10. Slide rod; 11. Restriction spring; 12. Sliding seat; 13. Pull rod; 14. Guide groove; 15. Crossbar; 16. Mounting seat; 17. Fixing plate; 18. Placement slot; 19. Fixing rod; 20. Mounting sleeve; 21. Restriction spring. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the embodiments.

[0029] Example 1

[0030] like Figures 1-6 As shown, this utility model provides a fixture for electrical testing of circuit boards, comprising: a placement plate 1, suction cups 2 fixedly installed at the four corners of the lower surface of the placement plate 1, a base plate 3 fixedly installed at the center of the upper surface of the placement plate 1, a mounting rod 4 fixedly installed at the center of the upper surface of the base plate 3, a limiting mechanism 5 slidably connected to both ends of the mounting rod 4, a circuit board 6 placed on the upper surface of the base plate 3, and the circuit board 6 and the limiting mechanism 5 engaging with each other, and a testing device 7 for testing the circuit board 6 fixedly installed on one side of the placement plate 1; the limiting mechanism 5 includes mounting grooves 8 formed at both ends of the mounting rod 4, a fixing seat 9 fixedly installed at one end of the inner wall of the mounting groove 8, a sliding rod 10 fixedly installed at one end of the fixing seat 9, a limiting spring 11 sleeved on the outer ring of the sliding rod 10, and a sliding seat 12 slidably connected to the end of the sliding rod 10 away from the fixing seat 9, and the sliding seat 12 slidably connected inside the mounting groove 8.

[0031] In this embodiment, when performing power-on testing on the circuit board 6, the operator first places the circuit board 6 to be tested stably on the base plate 3, and then uses the limiting mechanisms 5 at both ends of the mounting rod 4 to clamp and restrict the circuit board 6. The limiting mechanism 5 can be dynamically adjusted through the cooperation of the sliding rod 10, the limiting spring 11 and the sliding seat 12, which can flexibly adapt to circuit boards 6 of different sizes. This ensures the effectiveness of clamping and eliminates the need to replace the clamps separately for different specifications of circuit boards 6, thus improving the versatility and efficiency of testing. At the same time, the limiting mechanism 5 contacts the circuit board 6 through the limiting spring 21 with a hard rubber pad under the fixing plate 17. This avoids scratches on the surface of the circuit board 6 and damage to the solder joints, while providing a stable clamping force for the circuit board 6. This effectively prevents the circuit board 6 from shifting due to vibration or external force during testing, ensuring stable contact between the testing device 7 and the test points of the circuit board 6. This significantly reduces test errors caused by poor contact and further improves the stability, accuracy and safety of the power-on testing of the circuit board 6.

[0032] like Figure 3 As shown, preferably, the upper surface of the base plate 3 is provided with a pad for placing the circuit board 6.

[0033] In this embodiment, the pad can increase the placement stability of the circuit board 6.

[0034] Example 2

[0035] like Figure 4As shown, based on Embodiment 1, this utility model provides a technical solution: Preferably, the limiting mechanism 5 further includes guide grooves 14 formed at both ends of the mounting rod 4, a crossbar 15 is slidably connected inside the guide groove 14, and the crossbar 15 is fixedly connected to the sliding seat 12. The two ends of the crossbar 15 extend to the outside of the sliding seat 12 and are fixedly installed with mounting seats 16. A fixing plate 17 for pressing down and limiting the circuit board 6 is installed on one side of the mounting seat 16.

[0036] In this embodiment, when performing the limiting clamping operation on the circuit board 6, the operator first pushes the mounting base 16 and the fixed plate 17 connected to it, allowing them to slide smoothly along the guide groove 14. This quickly opens the space on the base plate 3 for placing the circuit board 6. During this process, the limiting spring 11 is compressed. Then, the operator places the circuit board 6 to be tested in the designated area of ​​the base plate 3. After placement, the operator releases the external force limiting the mounting base 16 and the fixed plate 17. At this time, the sliding seat 12 will automatically reset under the rebound force of the limiting spring 11, thereby driving the mounting base 16 and the fixed plate 17 to move synchronously towards the circuit board 6. Finally, the fixed plate 17 forms a stable clamp for the circuit board 6. The entire operation process does not require additional tools and relies on the spring force to achieve automatic reset clamping. This not only improves the convenience and efficiency of fixing the circuit board 6, but also limits its position, effectively preventing the circuit board 6 from being misaligned due to equipment vibration or accidental contact during testing. It ensures that the test points of the circuit board 6 and the test device 7 always maintain precise alignment, providing a reliable guarantee for the accuracy of power-on testing.

[0037] like Figure 4 As shown, preferably, a pull rod 13 for pulling the sliding seat 12 is fixedly installed at the top end of the sliding seat 12.

[0038] In this embodiment, the pull rod 13 at the top of the sliding seat 12 facilitates the pulling of the mounting seat 16 and the fixing plate 17. Applying force to pull between the two mounting seats 16 can increase the stability of the limiting mechanism 5 during use.

[0039] Example 3

[0040] like Figure 5 As shown, based on Embodiment 1, this utility model provides a technical solution: preferably, the bottom end of the fixing plate 17 is provided with a plurality of placement grooves 18 at equal intervals, a fixing rod 19 is fixedly installed inside the placement groove 18, an installation sleeve 20 is fixedly installed on the fixing rod 19, and a limiting spring piece 21 for limiting the circuit board 6 is fixedly installed at the bottom end of the installation sleeve 20.

[0041] In this embodiment, to further optimize the adaptability and limiting effect of the limiting mechanism 5 on circuit boards 6 of different sizes, the fixture has several placement slots 18 equidistantly opened at the bottom of the fixing plate 17. The mounting sleeve 20 is securely installed in the slots by the fixing rod 19, and the bottom of the mounting sleeve 20 is specially provided with a limiting spring piece 21 for applying elastic restriction to the surface of the circuit board 6. The equidistantly distributed placement slots 18 allow the limiting spring piece 21 to act evenly on the surface of the circuit board 6. Even when facing circuit boards 6 with large size differences, a stable limiting force can be formed by multi-point elastic clamping, avoiding deformation or displacement of the circuit board 6 due to uneven local force. At the same time, the elastic characteristics of the limiting spring piece 21 can flexibly adapt to the slight undulations of the surface of the circuit board 6. It can fit tightly to the circuit board 6 without manual pressure adjustment, which not only improves the compatibility with circuit boards 6 of different thicknesses and edge shapes, but also avoids the squeezing damage to the components and solder joints on the surface of the circuit board 6 caused by rigid clamping.

[0042] like Figure 5 As shown, preferably, a hard rubber pad is fixedly installed at the bottom end of the limiting spring 21.

[0043] In this embodiment, the hard rubber pad provided at the bottom of the limiting spring 21 can protect the circuit board 6 when the limiting mechanism 5 restricts it, avoiding damage to the circuit board 6 caused by hard contact, and further improving the safety of the circuit board 6 during testing.

[0044] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A fixture for in-circuit electrical testing, characterized by, include: Placement plate (1), suction cups (2) are fixedly installed at the four corners of the lower surface of the placement plate (1), base plate (3) is fixedly installed at the center of the upper surface of the placement plate (1), mounting rod (4) is fixedly installed at the center of the upper surface of the base plate (3), and limiting mechanism (5) is slidably connected to both ends of the mounting rod (4). Circuit board (6) is placed on the upper surface of the base plate (3), and the circuit board (6) and the limiting mechanism (5) are engaged. A testing device (7) for testing the circuit board (6) is fixedly installed on one side of the placement plate (1). The limiting mechanism (5) includes mounting grooves (8) formed at both ends of the mounting rod (4). A fixing seat (9) is fixedly installed at one end of the inner wall of the mounting groove (8). A sliding rod (10) is fixedly installed at one end of the fixing seat (9). A limiting spring (11) is sleeved on the outer ring of the sliding rod (10). A sliding seat (12) is slidably connected to the end of the sliding rod (10) away from the fixing seat (9), and the sliding seat (12) is slidably connected inside the mounting groove (8).

2. The fixture for in-circuit electrical testing according to claim 1, wherein: The upper surface of the base plate (3) is provided with a pad for placing the circuit board (6).

3. The fixture for in-circuit electrical testing of claim 2, wherein: The limiting mechanism (5) further includes guide grooves (14) at both ends of the mounting rod (4). A crossbar (15) is slidably connected inside the guide groove (14), and the crossbar (15) is fixedly connected to the sliding seat (12). The two ends of the crossbar (15) extend to the outside of the sliding seat (12) and are fixedly installed with mounting seats (16). A fixing plate (17) for pressing down and limiting the circuit board (6) is installed on one side of the mounting seat (16).

4. The fixture for in-circuit electrical testing according to claim 3, wherein: A pull rod (13) for pulling the sliding seat (12) is fixedly installed at the top end of the sliding seat (12).

5. The fixture for in-circuit electrical testing according to claim 4, wherein: The bottom end of the fixing plate (17) is provided with a plurality of placement slots (18) at equal intervals. A fixing rod (19) is fixedly installed inside the placement slot (18). An installation sleeve (20) is fixedly installed on the fixing rod (19). A limiting spring (21) for limiting the circuit board (6) is fixedly installed at the bottom end of the installation sleeve (20).

6. The fixture for in-circuit electrical testing of claim 5, wherein: A hard rubber pad is fixedly installed at the bottom end of the limiting spring (21).

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