An instrument for testing impedance and button rebound force of PCBs

Abstract

This utility model relates to an impedance and button rebound force testing device for PCBs, comprising a housing, an impedance tester housed within the housing, a control terminal connected to the impedance tester, a support plate slidably mounted on the housing, a drive assembly for driving the support plate to slide, a PCB fixture fixed to the support plate by bolts, an impedance testing component mounted above the support plate via a lifting assembly, and a rebound force testing component mounted above the impedance testing component via a second lifting assembly. The impedance testing component includes an L-shaped plate, with an elastic probe connected to the horizontal portion of the L-shaped plate. The elastic probe is connected to an adjustment assembly for adjusting its position in the horizontal plane. The elastic probe is connected to the impedance tester via a wire. This device can perform impedance and button rebound force tests on PCBs. The position of the elastic probe in the horizontal plane can be freely adjusted via the adjustment assembly, making it adaptable to different PCBs, thereby enhancing the practicality and versatility of the device.

Description

Technical Field

[0001] This utility model relates to the field of PCB testing technology, and in particular to a device for testing the impedance and button rebound force of PCBs. Background Technology

[0002] PCB circuits are typically complex and intricate, making them prone to breakage or severe etching during production, resulting in high impedance. Both defects render the PCB unusable. Therefore, impedance testing is necessary after PCB production. Existing PCB impedance testing equipment often places the PCB in a fixture and drives a probe downwards to contact the contacts on the PCB for impedance testing. The probe positions are mostly fixed, limiting testing to a single PCB model and resulting in poor practicality and versatility. Furthermore, some PCBs integrate buttons, requiring spring force testing before shipment. This necessitates moving the PCB between impedance testing and spring force testing equipment, making the process cumbersome. Therefore, this invention proposes an impedance and button spring force testing device for PCBs. Utility Model Content

[0003] The main objective of this invention is to provide an impedance and button rebound force testing device for PCBs, in order to solve the problems mentioned in the background art.

[0004] This utility model achieves the above-mentioned objective through the following technical solution: an impedance and button rebound force testing device for PCBs, comprising a housing, an impedance tester disposed within the housing, a control terminal connected to the impedance tester and disposed on the surface of the housing, a support plate slidably disposed on the upper surface of the housing, a drive assembly connected to the support plate for driving its sliding, a PCB fixture fixed to the support plate by bolts, an impedance testing assembly disposed above the support plate by a lifting assembly, and a spring force testing assembly disposed above the impedance testing assembly by a second lifting assembly. The impedance testing assembly includes an L-shaped plate, the horizontal portion of which extends above the support plate, and an elastic probe connected to the horizontal portion of the L-shaped plate. The elastic probe is connected to an adjustment assembly for adjusting its position in the horizontal plane, and the elastic probe is connected to the impedance tester via a wire.

[0005] Preferably, the box body is L-shaped, the vertical part of the L-shaped plate is slidably connected to the box body via a vertical slide rail, and the lifting assembly is a lifting cylinder located on both sides of the L-shaped plate for driving its lifting and lowering.

[0006] Preferably, the adjustment assembly includes a probe bracket, which is a horizontally arranged rod. A fastening bolt is connected to the probe bracket, and a through groove is provided on the probe bracket along its length. The fastening bolt passes through the through groove to fix the probe bracket to the L-shaped plate.

[0007] Preferably, the second lifting assembly includes a second L-shaped plate fixed to the front of the vertical portion of the box body. A slider is slidably connected to the second L-shaped plate via a vertical slide rail. A servo motor with its output facing downward is fixed to the top of the second L-shaped plate. A lead screw is connected to the output end of the servo motor. A screw hole is vertically provided on the slider. The lead screw passes through the screw hole and is threaded into the slider. The elasticity testing assembly is connected to the front of the slider.

[0008] Preferably, the elasticity testing assembly includes a first L-shaped block fixed on the slider and a second L-shaped block forming a U-shape with the first L-shaped block and slidably connected to the slider via a vertical slide rail. A connecting rod is vertically provided between the first L-shaped block and the second U-shaped block. The top end of the connecting rod passes through the upper end face of the first L-shaped block and is connected to a stop block. The bottom end of the connecting rod passes through the lower end face of the second L-shaped block and is connected to a connecting block. A pressure sensor is connected to the bottom end of the connecting block. The pressure sensor is electrically connected to the control terminal. A pressure head for pressing a button is connected to the bottom end of the pressure sensor. The pressure head is located above the horizontal portion of the L-shaped plate. An avoidance notch is provided on the horizontal portion of the L-shaped plate. A spring is sleeved on the connecting rod, and the spring is located between the first L-shaped block and the second L-shaped block.

[0009] Preferably, the drive component is a rodless cylinder.

[0010] The beneficial effects of this utility model are: the device can simultaneously test the rebound force of the impedance test button on the PCB, avoiding the need to move the PCB between different devices, thus improving work efficiency; the position of the elastic probe in the horizontal plane can be freely adjusted by the adjustment component, making it adaptable to different PCBs, thereby enhancing the practicality and versatility of the device. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of an impedance and button rebound force testing device for PCBs, as shown in the example.

[0012] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0013] Figure 3 This is a schematic diagram of the elasticity testing component.

[0014] The numbers in the image represent: 1. Box body; 2. Support plate; 3. Drive assembly; 4. PCB fixture; 5. Lifting assembly; 6. Impedance testing assembly; 7. Second lifting assembly; 8. Elasticity testing assembly; 9. L-shaped plate; 10. Elastic probe; 11. Adjustment assembly; 12. Probe bracket; 13. Fastening bolt; 14. Through slot; 15. Second L-shaped plate; 16. Slider; 17. Servo motor; 18. Lead screw; 19. First L-shaped block; 20. Second L-shaped block; 21. Connecting rod; 22. Stop block; 23. Connecting block; 24. Pressure sensor; 25. Pressure head; 26. Spring. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to specific embodiments.

[0016] Example: like Figure 1-3 As shown, this utility model discloses an impedance and button rebound force testing device for PCBs, comprising a housing 1, an impedance tester (not shown) disposed within the housing 1, a control terminal (not shown) connected to the impedance tester and disposed on the surface of the housing 1, a support plate 2 slidably disposed on the upper surface of the housing 1, a drive assembly 3 connected to the support plate 2 for driving its sliding, a PCB fixture 4 fixed to the support plate 2 by bolts, an impedance testing assembly 6 disposed above the support plate 2 by a lifting assembly 5, and a rebound force testing assembly 8 disposed above the impedance testing assembly 6 by a second lifting assembly 7. The impedance testing assembly 6 includes an L-shaped plate 9, the horizontal portion of which extends above the support plate 2. An elastic probe 10 is connected to the horizontal portion of the L-shaped plate 9. The elastic probe 10 is connected to an adjustment assembly 11 for adjusting its position in the horizontal plane. The elastic probe 10 is connected to the impedance tester via a wire. The PCB fixture 4 is bolted to the support plate 2, allowing for the replacement of different fixtures for different PCB models. The PCB to be tested is placed inside the PCB fixture 4. The drive assembly 3 drives the support plate 2, causing the PCB fixture 4 to slide below the impedance testing assembly 6. The lifting assembly 5 drives the impedance testing assembly 6 downwards, causing the elastic probe 10 to contact the contacts on the PCB, and impedance testing is performed using the impedance testing machine. Simultaneously, the second lifting assembly 7 drives the spring force testing assembly 8 downwards to perform spring force testing on the buttons on the PCB. This allows for impedance testing and button spring force testing of the PCB on a single device, avoiding the need to transport the PCB between different devices and improving work efficiency. The adjustment assembly 11 allows for free adjustment of the position of the elastic probe 10 within the horizontal plane, adapting it to different PCBs and enhancing the practicality and versatility of the equipment.

[0017] The box body 1 is L-shaped, and the vertical part of the L-shaped plate 9 is slidably connected to the box body 1 through a vertical slide rail. The lifting assembly 5 is a lifting cylinder 27 located on both sides of the L-shaped plate 9 for driving its lifting and lowering.

[0018] The adjustment assembly 11 includes a probe bracket 12, with an elastic probe 10 disposed at the end of the probe bracket 12. One end of the probe bracket 12 connected to the elastic probe 10 is a pointed tip, thereby minimizing the distance between the two elastic probes 10. The probe bracket 12 is a horizontally arranged rod, and a fastening bolt 13 is connected to the probe bracket 12. The probe bracket 12 has a through groove 14 along its length direction. The fastening bolt 13 passes through the through groove 14 to fix the probe bracket 12 to the L-shaped plate 9. Loosening the fastening bolt 13 allows adjustment of the position of the probe bracket 12, thereby adjusting the position of the elastic probe 10, enabling the device to test PCBs of different specifications.

[0019] The second lifting assembly 7 includes a second L-shaped plate 15 fixed to the front of the vertical portion of the housing 1. A slider 16 is slidably connected to the second L-shaped plate 15 via a vertical slide rail. A servo motor 17 with its output facing downward is fixed to the top of the second L-shaped plate 15. A lead screw 18 is connected to the output end of the servo motor 17. A screw hole is vertically provided on the slider 16. The lead screw 18 passes through the screw hole and is threadedly engaged with the slider 16. The elasticity testing assembly 8 is connected to the front of the slider 16. The servo motor 17 drives the lead screw 18 to rotate, thereby driving the slider 16 to slide in the vertical direction, which can drive the elasticity testing assembly 8 to press down and perform an elasticity test on the button on the PCB.

[0020] The elasticity testing assembly 8 includes a first L-shaped block 19 fixed on the slider 16 and a second L-shaped block 20 forming a U-shape with the first L-shaped block 19 and slidably connected to the slider 16 via a vertical slide rail. A connecting rod 21 is vertically arranged between the first L-shaped block 19 and the second U-shaped block. The top end of the connecting rod 21 passes through the upper end face of the first L-shaped block 19 and is connected to a stop block 22. The bottom end of the connecting rod 21 passes through the lower end face of the second L-shaped block 20 and is connected to a connecting block 23. A pressure sensor 24 is connected to the bottom end of the connecting block 23. The pressure sensor 24 is electrically connected to the control terminal. The pressure sensor 24 is connected to a pressure head 25 for pressing a button at its bottom end. The pressure head 25 is located above the horizontal portion of the L-shaped plate 9. The horizontal portion of the L-shaped plate 9 has an clearance notch. A spring 26 is sleeved on the connecting rod 21. The spring 26 is located between the first L-shaped block 19 and the second L-shaped block 20. The second lifting assembly 7 drives the elastic force testing assembly 8 downward. The pressure head 25 presses down on the button on the PCB. The pressure sensor 24 is used to monitor the pressure value and transmit the monitored pressure to the control terminal. The spring 26 is compressed to provide a buffering effect.

[0021] The drive component 3 is a rodless cylinder.

[0022] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A device for testing the impedance and button rebound force of a PCB, characterized in that: The device includes a housing, an impedance tester disposed within the housing, a control terminal connected to the impedance tester and disposed on the surface of the housing, a support plate slidably disposed on the upper surface of the housing, a drive assembly connected to the support plate for driving its sliding, a PCB fixture fixed to the support plate by bolts, an impedance test assembly disposed above the support plate by a lifting assembly, and an elastic test assembly disposed above the impedance test assembly by a second lifting assembly. The impedance test assembly includes an L-shaped plate, the horizontal portion of which extends above the support plate. An elastic probe is connected to the horizontal portion of the L-shaped plate. The elastic probe is connected to an adjustment assembly for adjusting its position in the horizontal plane. The elastic probe is connected to the impedance tester via a wire.

2. The impedance and button rebound force testing device for PCBs according to claim 1, characterized in that: The box body is L-shaped, and the vertical part of the L-shaped plate is slidably connected to the box body through a vertical slide rail. The lifting assembly is a lifting cylinder located on both sides of the L-shaped plate for driving its lifting and lowering.

3. The impedance and button rebound force testing device for PCBs according to claim 1, characterized in that: The adjustment assembly includes a probe bracket, which is a horizontally arranged rod. A fastening bolt is connected to the probe bracket, and a through groove is provided on the probe bracket along its length. The fastening bolt passes through the through groove to fix the probe bracket to the L-shaped plate.

4. The impedance and button rebound force testing device for PCBs according to claim 2, characterized in that: The second lifting assembly includes a second L-shaped plate fixed to the front of the vertical part of the box body. A slider is slidably connected to the second L-shaped plate via a vertical slide rail. A servo motor with its output facing downward is fixed to the top of the second L-shaped plate. A lead screw is connected to the output end of the servo motor. A screw hole is vertically provided on the slider. The lead screw passes through the screw hole and is threaded into the slider. The elasticity testing assembly is connected to the front of the slider.

5. The impedance and button rebound force testing device for PCBs according to claim 4, characterized in that: The elasticity testing assembly includes a first L-shaped block fixed on the slider and a second L-shaped block forming a U-shape with the first L-shaped block and slidably connected to the slider via a vertical slide rail. A connecting rod is vertically provided between the first L-shaped block and the second U-shaped block. The top end of the connecting rod passes through the upper end face of the first L-shaped block and is connected to a stop block. The bottom end of the connecting rod passes through the lower end face of the second L-shaped block and is connected to a connecting block. A pressure sensor is connected to the bottom end of the connecting block. The pressure sensor is electrically connected to the control terminal. A pressure head for pressing a button is connected to the bottom end of the pressure sensor. The pressure head is located above the horizontal portion of the L-shaped plate. An clearance notch is provided on the horizontal portion of the L-shaped plate. A spring is sleeved on the connecting rod, and the spring is located between the first L-shaped block and the second L-shaped block.

6. The impedance and button rebound force testing device for PCBs according to claim 1, characterized in that: The drive component is a rodless cylinder.

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