Circuit board testing device

Abstract

The utility model discloses a circuit board testing device, which comprises a support frame, a driving device, a pressure detection device, a plugging device, a switch device and a needle bed, the driving device is arranged on the support frame, the pressure detection device is arranged at the working end of the driving device, and the needle bed is arranged on the pressure detection device. The plugging device and the switching device are respectively arranged on the needle bed; a fixed plate of the pressure detection device is connected with a driving device, a guide column is arranged on the fixed plate, a movable plate is slidably arranged on the guide column, and a pressure sensor is arranged on the movable plate. The driving device drives the pressure detection device and the needle bed to move downwards synchronously, and the pressure sensor detects the pressure between the movable plate and the fixed plate, so that the problems of inaccurate detection and circuit board damage caused by unstable pressure of manual operation of the needle bed are solved; power supply and on-off of the circuit board are controlled through the plugging device and the switching device, manual intervention is avoided, the detection efficiency is improved, and then the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing technology, and in particular to a circuit board testing device. Background Technology

[0002] Circuit boards, also known as printed circuit boards or PCBs, require testing during the manufacturing process. Probe testing is an indispensable part of this process, as it is used not only to detect open circuits and short circuits but also to test the functionality of the circuit board.

[0003] Currently, when performing probe testing on circuit boards, the circuit board is usually placed in a testing fixture first, and then the power supply terminals are manually connected to the interfaces on the circuit board. The switch on the circuit board is then manually turned on, and the bed of needles is operated to test the circuit board. This testing method requires manual operation at every step, resulting in low testing efficiency and affecting production efficiency. Furthermore, due to the manual operation of the bed of needles, the pressure is unstable, which may lead to inaccurate testing and, in severe cases, damage to the circuit board. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a circuit board testing device to solve the problems mentioned in the background section. To achieve the above objective, the present utility model adopts the following technical solution:

[0005] The circuit board testing device includes a support frame, a drive unit, a pressure detection unit, a plug-in / plug-out device, a switch device, and a needle bed. The drive unit is mounted on the support frame, the pressure detection unit is mounted on the working end of the drive unit, the needle bed is mounted on the side of the pressure detection unit away from the drive unit, and the plug-in / plug-out device and the switch device are respectively mounted on the needle bed.

[0006] The pressure detection device includes a fixed plate, guide pillars, a movable plate, and a pressure sensor. The fixed plate is disposed at the working end of the driving device. There are multiple guide pillars, which are respectively disposed on the side of the fixed plate away from the driving device. The movable plate is slidably disposed on the multiple guide pillars. Each guide pillar is fitted with a spring. The pressure sensor is disposed on the side of the movable plate close to the fixed plate.

[0007] Optionally, the driving device includes a support, a servo motor, a screw, and a connecting frame. The support is mounted on the support frame, the servo motor is mounted on the support, the screw is mounted on the working end of the servo motor, the connecting frame passes through and slidably connects to the support frame, and is helically connected to the screw. The fixing plate is mounted on the end of the connecting frame away from the servo motor.

[0008] Optionally, the insertion / removal device includes a first cylinder, a mounting base, and a power supply terminal. The first cylinder is disposed on the needle bed, the mounting base is disposed on the working end of the first cylinder, and the power supply terminal is disposed on the mounting base.

[0009] Optionally, the switching device includes a second cylinder, a slide block, a slide rail, a control plate, and a connecting plate. The slide block is disposed on the needle bed, the slide rail is slidably disposed within the slide block, the second cylinder is disposed on the needle bed on one side of the slide rail, the control plate is disposed on the slide rail, and the connecting plate connects the slide rail and the working end of the second cylinder.

[0010] Optionally, the driving device further includes a guide rail disposed inside the support, and the connecting frame and the guide rail are slidably connected.

[0011] Optionally, a probe mounting plate is provided on the side of the needle bed away from the movable plate, and a plurality of detection probes are provided on the probe mounting plate.

[0012] Optionally, the device also includes a testing fixture, which is disposed within the support frame corresponding to the needle bed. The testing fixture has a circuit board receiving slot, and the circuit board receiving slot has multiple positioning posts.

[0013] Optionally, the sidewall of the circuit board receiving groove is provided with a first clearance groove and a second clearance groove respectively through the plug-in device and the switch device.

[0014] Compared with the prior art, the advantages of this invention are that, by adopting the above solution, the pressure detection device and the needle bed move downward synchronously through the driving device, and the pressure sensor detects the pressure between the moving plate and the fixed plate, thus avoiding the problem of unstable pressure of the needle bed caused by manual operation, which can easily lead to inaccurate detection and damage to the circuit board. The power supply and switching of the circuit board are controlled by the plug-in device and the switching device, thus avoiding manual intervention, improving detection efficiency, and thus improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the pressure detection device of this utility model;

[0017] Figure 3 This is a schematic diagram of the drive device structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the insertion and removal device of this utility model;

[0019] Figure 5This is a schematic diagram of the switching device structure of this utility model;

[0020] Figure 6 This is a schematic diagram of the testing fixture structure of this utility model;

[0021] Explanation of reference numerals in the attached drawings: 1. Support frame; 2. Drive device; 3. Pressure detection device; 4. Insertion / removal device; 5. Switching device; 6. Needle bed; 31. Fixing plate; 32. Guide post; 33. Movable plate; 34. Pressure sensor; 35. Spring; 21. Support; 22. Servo motor; 23. Screw; 24. Connecting frame; 41. First cylinder; 42. Mounting base; 43. Power supply terminal; 51. Second cylinder; 52. Slide; 53. Slide rail; 54. Control board; 55. Connecting plate; 25. Guide rail; 61. Probe mounting plate; 62. Detection probe; 7. Detection fixture; 71. Circuit board receiving slot; 73. First clearance slot; 74. Second clearance slot. Detailed Implementation

[0022] To facilitate understanding of this application, a more detailed description of the application is provided below with reference to the accompanying drawings and specific embodiments; preferred embodiments of the application are shown in the drawings; however, the application may be implemented in many different forms and is not limited to the embodiments described in this specification; rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this application.

[0023] It should be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. The terms "vertical," "horizontal," "left," "right," "front," "rear," and similar expressions used in this specification are for illustrative purposes only.

[0024] It should also be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; it should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0025] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0026] like Figure 1 , Figure 2 As shown, the circuit board testing device includes a support frame 1, a drive device 2, a pressure detection device 3, a plug-in device 4, a switch device 5, and a needle bed 6. The drive device 2 is vertically mounted on the top of the support frame 1, the pressure detection device 3 is mounted on the working end of the drive device 2, the needle bed 6 is mounted away from the bottom of the pressure detection device 3, and the plug-in device 4 and the switch device 5 are respectively mounted on the needle bed 6.

[0027] The pressure detection device 3 includes a fixed plate 31, guide pillars 32, a movable plate 33, and a pressure sensor 34. The fixed plate 31 is horizontally positioned at the working end of the drive device 2. There are four guide pillars 32, which are respectively positioned on the bottom surface of the fixed plate 31. The movable plate 33 is slidably positioned on the four guide pillars 32. Each guide pillar 32 is fitted with a spring 35, and the two ends of the spring 35 abut against the fixed plate 31 and the movable plate 33 respectively, for resetting the movable plate 33. The pressure sensor 34 is positioned on the top of the movable plate 33. Each guide pillar 32 has a limit platform at its bottom end to limit the movement of the movable plate 33.

[0028] During operation, the circuit board to be tested is placed at the bottom of the support frame 1. The drive device 2 drives the pressure detection device 3 and the needle bed 6 to move downward. After the needle bed 6 contacts the circuit board, it pushes the movable plate 33 to move upward along the guide post 32, so that the pressure sensor 34 and the fixed plate 31 come into contact and generate pressure. When the pressure value reaches the preset value, the drive device 2 stops moving. The plug-in device 4 is connected to the circuit board and supplies power to the circuit board. The switch device 5 controls the power switch on the circuit board. The probe at the bottom of the needle bed 6 tests the circuit board.

[0029] This application uses a drive device 2 to drive the pressure detection device 3 and the needle bed 6 to move downwards synchronously. The pressure sensor 34 detects the pressure between the movable plate 33 and the fixed plate 31, avoiding the problem of unstable pressure caused by manual operation of the needle bed 6, which can easily lead to inaccurate detection and damage to the circuit board. The plug-in device 4 and the switch device 5 control the power supply and switching of the circuit board, avoiding manual intervention, improving detection efficiency, and thus improving production efficiency.

[0030] In one embodiment, such as Figure 3As shown, the drive device 2 includes a support 21, a servo motor 22, a screw 23, and a connecting frame 24. The support 21 is vertically mounted on the top of the support frame 1. The servo motor 22 is mounted on the top of the support 21. The top of the screw 23 is connected to the working end of the servo motor 22, and its bottom is rotatably connected to the support frame 1. The connecting frame 24 vertically penetrates and slides through the top of the support frame 1, and is spirally connected to the screw 23. The fixing plate 31 is horizontally mounted on the bottom of the connecting frame 24.

[0031] During operation, the servo motor 22 drives the screw 23 to rotate, and the rotation of the screw 23 pushes the connecting frame 24 to move downward, which in turn drives the pressure detection device 3 and the needle bed 6 to move downward simultaneously through the fixing plate 31.

[0032] In one embodiment, such as Figure 4 As shown, the insertion / removal device 4 includes a first cylinder 41, a mounting base 42, and a power supply terminal 43. The first cylinder 41 is disposed on the top surface of the needle bed 6, the mounting base 42 is disposed on the working end of the first cylinder 41 and extends to the bottom of the needle bed 6, and the power supply terminal 43 is disposed on the mounting base 42. The first cylinder 41 is initially in the extended state. When the driving device 2 stops moving, the first cylinder 41 retracts, and the power supply terminal is inserted into the power supply interface on the circuit board through the mounting base 42.

[0033] In one embodiment, such as Figure 5 As shown, the switching device 5 includes a second cylinder 51, a slide 52, a slide rail 53, a control plate 54, and a connecting plate 55. The slide 52 is disposed on the bottom surface of the needle bed 6, the slide rail 53 is slidably disposed in the slide 52, the second cylinder 51 is disposed on the needle bed 6 on one side of the slide rail 53, the control plate 54 is disposed on the slide rail 53, and the connecting plate 55 connects the working ends of the slide rail 53 and the second cylinder 51.

[0034] During operation, the second cylinder 51 drives the slide rail 53 to slide within the slide block 52 via the connecting plate 55. The slide rail 53 drives the control board 54 to toggle the switch on the circuit board to energize the circuit board.

[0035] In one embodiment, such as Figure 3 As shown, the drive device 2 also includes two guide rails 25, which are symmetrically arranged on both sides of the support 21. The connecting frame 24 is slidably connected to the two guide rails 25 respectively. The guide rails 25 keep the operation of the connecting frame 24 stable.

[0036] In one embodiment, such as Figure 2 As shown, a probe mounting plate 61 is horizontally arranged on the bottom surface of the needle bed 6, and multiple detection probes 62 are arranged on the probe mounting plate 61; the probe mounting plate 61 is detachably connected to the needle bed 6, which facilitates the replacement of the detection probes 62.

[0037] In one embodiment, such as Figure 1 , Figure 6As shown, the circuit board testing device also includes a testing fixture 7, which is positioned below the support frame 1 corresponding to the needle bed 6. The testing fixture 7 has a circuit board receiving groove 71 for receiving the circuit board, and multiple positioning posts 72 are provided inside the circuit board receiving groove 71 for positioning the circuit board.

[0038] In one embodiment, such as Figure 6 As shown, the sidewall of the circuit board receiving groove 71 is provided with a first clearance groove 73 and a second clearance groove 74 respectively through the plug-in device 4 and the switch device 5. The two clearance grooves facilitate the operation of the plug-in device 4 and the switch device 5.

[0039] It should be noted that the above-mentioned technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification; and, for those skilled in the art, improvements or modifications can be made based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims of this utility model.

Claims

1. A circuit board testing device, characterized in that, It includes a support frame, a drive device, a pressure detection device, an insertion and removal device, a switch device, and a needle bed. The drive device is mounted on the support frame, the pressure detection device is mounted on the working end of the drive device, the needle bed is mounted on the side of the pressure detection device away from the drive device, and the insertion and removal device and the switch device are respectively mounted on the needle bed. The pressure detection device includes a fixed plate, guide pillars, a movable plate, and a pressure sensor. The fixed plate is disposed at the working end of the driving device. There are multiple guide pillars, which are respectively disposed on the side of the fixed plate away from the driving device. The movable plate is slidably disposed on the multiple guide pillars. Each guide pillar is fitted with a spring. The pressure sensor is disposed on the side of the movable plate close to the fixed plate.

2. The circuit board testing device according to claim 1, characterized in that, The driving device includes a support, a servo motor, a screw, and a connecting frame. The support is mounted on the support frame, the servo motor is mounted on the support, the screw is mounted on the working end of the servo motor, the connecting frame passes through and slidably connects to the support frame, and is helically connected to the screw. The fixing plate is mounted on the end of the connecting frame away from the servo motor.

3. The circuit board testing device according to claim 1, characterized in that, The insertion and removal device includes a first cylinder, a mounting base, and a power supply terminal. The first cylinder is disposed on the needle bed, the mounting base is disposed on the working end of the first cylinder, and the power supply terminal is disposed on the mounting base.

4. The circuit board testing device according to claim 1, characterized in that, The switching device includes a second cylinder, a slide block, a slide rail, a control plate, and a connecting plate. The slide block is disposed on the needle bed, the slide rail is slidably disposed within the slide block, the second cylinder is disposed on the needle bed on one side of the slide rail, the control plate is disposed on the slide rail, and the connecting plate connects the slide rail and the working end of the second cylinder.

5. A circuit board testing device according to claim 2, characterized in that, The driving device also includes a guide rail, which is disposed inside the support, and the connecting frame and the guide rail are slidably connected.

6. The circuit board testing device according to claim 1, characterized in that, A probe mounting plate is provided on the side of the needle bed away from the movable plate, and multiple detection probes are provided on the probe mounting plate.

7. The circuit board testing device according to claim 1, characterized in that, It also includes a testing fixture, which is disposed within the support frame corresponding to the needle bed. The testing fixture is provided with a circuit board receiving groove, and a plurality of positioning posts are provided within the circuit board receiving groove.

8. A circuit board testing device according to claim 7, characterized in that, The sidewall of the circuit board receiving groove is provided with a first clearance groove and a second clearance groove respectively, corresponding to the plug-in device and the switch device.

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