A turnover mechanism for PCB testing

Abstract

This utility model belongs to the field of flipping mechanism technology, and particularly relates to a flipping mechanism for PCB board testing, including a first plate that can be rotated; a clamping assembly including two second plates that can be driven to move closer or further apart simultaneously, so that the PCB board is clamped between the two second plates. The surface of the first plate has a sliding groove, and part of the clamping assembly is installed in the sliding groove. This application uses a driving component to drive a bidirectional lead screw to rotate, and the bidirectional lead screw drives a slider to slide along the sliding groove and move closer to each other. The two sliders move the same distance on two threads with the same pitch and opposite directions, so that the two sliders can drive the two second plates to move towards the center position between the two second plates and accurately fix the PCB board in the same position. This prevents height differences caused by adjusting the two second plates separately, which could lead to damage to the PCB board, thus improving the safety of the device.

Description

Technical Field

[0001] This utility model belongs to the field of flipping mechanism technology, and in particular relates to a flipping mechanism for PCB board testing. Background Technology

[0002] A PCB board testing flipping mechanism is an automated or semi-automated mechanical device used to safely and stably flip PCB boards during testing.

[0003] For example, Chinese patent CN212693838U discloses a flipping mechanism for PCB board testing. The device places the PCB board inside the clamping plate, and then rotates the threaded rod to move the clamping plate inward. The clamping plate will clamp the PCB board to fix PCB boards of different thicknesses.

[0004] This patent uses two symmetrically arranged clamps to hold one side of the PCB board. However, both clamps require rotating threaded rods for control, which can cause differences in the movement distance of the two clamps. This can lead to different fixed heights on both sides of the PCB board, resulting in damage to the PCB board. Utility Model Content

[0005] The purpose of this utility model is to provide a flipping mechanism for PCB board testing to solve the problems mentioned in the background art, including:

[0006] The first plate is rotatable;

[0007] The clamping assembly includes two second plates that can be driven to move closer or further apart simultaneously, so that the PCB board is clamped between the two second plates.

[0008] Preferably, a groove is formed on the surface of the first plate, and part of the clamping assembly is installed in the groove.

[0009] Preferably, the clamping assembly includes:

[0010] A bidirectional lead screw is rotatably mounted in a slide groove, and the bidirectional lead screw passes through the first plate.

[0011] A driving component that can drive a bidirectional lead screw to rotate;

[0012] Two sliders are threaded onto a bidirectional lead screw. The two sliders are symmetrically arranged and can slide along a groove. Two second plates are fixed to the two sliders respectively.

[0013] Preferably, an elastic component is installed on the second plate, which is capable of making elastic contact with the PCB board.

[0014] Preferably, the elastic component includes:

[0015] Two rods that pass through the second plate and can slide along the second plate;

[0016] Two limiting members are fixedly installed at one end of the two rods respectively, and the limiting members can prevent the rods from detaching from the second plate.

[0017] The third plate is fixedly installed at the other end of the two rods, and the third plate can contact the PCB board.

[0018] The elastic element is installed between the second plate and the third plate.

[0019] Preferably, the limiting member is a disc, and the diameter of the disc is larger than that of the rod.

[0020] Preferably, the elastic element is a spring, and the two ends of the spring are fixed to the second plate and the third plate, respectively.

[0021] Preferably, a preload assembly is installed on the second plate, the preload assembly being able to change the initial elastic force of the elastic element.

[0022] Preferably, the preloaded component includes:

[0023] The telescopic component is fixedly installed on the second plate.

[0024] A pressure column, which is fixed to an elastic element, can be driven by a telescopic element to compress or stretch the elastic element.

[0025] Preferably, the telescopic component is a cylinder, the cylinder is fixed to the second plate, and the output end of the cylinder is fixed to the pressure column.

[0026] This application uses a drive component to rotate a bidirectional lead screw, which in turn drives a slider to slide along a groove and move closer to each other. The two sliders move the same distance on two threads with the same pitch but opposite directions, allowing them to move the two second plates toward the center position between them and accurately fix the PCB board in the same position. This prevents height differences from being caused by adjusting the two second plates separately, thus avoiding damage to the PCB board and improving the safety of the device. Attached Figure Description

[0027] Figure 1 This is an axial view of the present invention;

[0028] Figure 2 This is a structural diagram of the clamping assembly of this utility model;

[0029] Figure 3 This is a structural diagram of the preloaded component of the elastic component of this utility model.

[0030] The markings in the diagram are as follows:

[0031] 100. First plate; 110. Slide groove;

[0032] 200. Clamping assembly; 210. Bidirectional lead screw; 220. Driving component; 230. Slider; 240. Second plate;

[0033] 300, Elastic component; 310, Rod; 320, Limiting component; 330, Third plate; 340, Elastic component;

[0034] 400. Preload assembly; 410. Telescopic component; 420. Pressure column. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0036] In existing technologies (such as CN212693838U), PCB boards can be damaged during clamping for unknown reasons. Long-term practice has revealed that adjusting the two clamping plates individually can cause a difference in their movement distances, leading to inconsistent clamping heights and damage to the PCB board. To address this issue, this embodiment provides a PCB board testing flipping mechanism, such as... Figure 1 As shown, it includes: a first plate 100 and a clamping assembly 200. The clamping assembly 200 has two second plates 240, which can be adjusted synchronously to ensure that the clamping point height is uniform.

[0037] like Figure 1 As shown, the first board 100 is a prior art rectangular board that can be rotated in the public notice number CN212693838U to complete the flipping of the PCB board;

[0038] like Figure 2As shown, the clamping assembly 200 includes two second plates 240. The two second plates 240 can be driven to move closer or further away simultaneously, so that the PCB board is clamped between the two second plates 240. Since the two second plates 240 are driven simultaneously, the center position between the two second plates 240 is the clamping and fixing position of the PCB board, thereby ensuring a uniform clamping height. Specifically, the surface of the first plate 100 is provided with a sliding groove 110. The sliding groove 110 is rectangular. Part of the structure of the clamping assembly 200 is installed in the sliding groove 110. The clamping assembly 200 includes: a bidirectional lead screw 210, a driving member 220, and two sliders 230.

[0039] The bidirectional lead screw 210 is a round rod with two threads of the same pitch but opposite directions on its surface. It is rotatably mounted in the slide groove 110. The bidirectional lead screw 210 passes through the first plate 100 and is rotatably connected to the first plate 100 via a bearing. The bidirectional lead screw 210 can rotate with the aid of the bearing. The driving component 220 can drive the bidirectional lead screw 210 to rotate. In one embodiment, the driving component 220 is a motor, which is fixed to the first plate 100. The output end of the motor is fixed to the bidirectional lead screw 210. The motor has... With its self-locking and forward / reverse rotation functions, this design improves the device's automation. In another design, the drive component 220 is a knob, which is directly fixed to the end of the bidirectional lead screw 210. With the aid of external force, the rotation of the bidirectional lead screw 210 can be controlled. The two sliders 230 are square and are threaded onto the two opposite threads of the bidirectional lead screw 210. The two sliders 230 are symmetrically arranged and can slide along the slide groove 110. The two second plates 240 are fixed to the two sliders 230 respectively.

[0040] In use, the PCB board to be clamped and fixed is first placed between the two second plates 240. Then, the drive component 220 drives the bidirectional lead screw 210 to rotate. The bidirectional lead screw 210 drives the slider 230 to slide along the slide groove 110 and move closer to each other. The two sliders 230 move the same distance on the two threads with the same pitch and opposite directions. This allows the two sliders 230 to drive the two second plates 240 to move towards the center position between the two second plates 240 and accurately fix the PCB board in the same position. The height difference caused by adjusting the two second plates 240 separately will not cause damage to the PCB board, thus improving the safety of the device.

[0041] To prevent excessive clamping force from the two second plates 240 on the PCB board, which could damage the PCB board, a further solution is as follows: Figure 3As shown, an elastic component 300 is installed on the second plate 240. The elastic component 300 can make elastic contact with the PCB board, so that the contact pressure between the elastic component 300 and the PCB board can gradually increase with elasticity, without instantaneously increasing and damaging the PCB board. Specifically, the elastic component 300 includes: two rods 310, two limiting members 320, a third plate 330, and an elastic member 340.

[0042] Two rods 310 are round rods that penetrate the second plate 240 and can slide along the second plate 240. The two rods 310 are symmetrically distributed at both ends of the second plate 240. Two limiting members 320 are discs with a diameter larger than the rods 310. They are fixedly installed at the ends of the two rods 310 away from the PCB board, and the limiting members 320 prevent the rods 310 from detaching from the second plate 240. The third plate 330 is rectangular and is fixedly installed at the other end of the two rods 310. The third plate 330 can contact the PCB board. The elastic member 340 is a spring with both ends fixed to the second plate 240 and the third plate 330, respectively. It is installed between the second plate 240 and the third plate 330.

[0043] In use, the third plate 330 will first contact the PCB board as the second plate 240 moves. As the second plate 240 continues to move, the third plate 330 will slide along the second plate 240 with the rod 310. At the same time, the distance between the second plate 240 and the third plate 330 will decrease, the elastic element 340 will be compressed, and the elastic force will gradually increase. Meanwhile, the elastic force pushes the third plate 330 to apply a clamping force to the PCB board, which can keep the clamping force and the elastic force consistent and prevent damage to the PCB board due to a sudden increase in clamping force, thus improving the safety of the device.

[0044] The maximum clamping force that a PCB can withstand during test flipping depends on various factors, including board material, thickness, number of layers, component layout, and support method. In order to control the clamping force and adapt it to the PCB, a further solution is to install a preload component 400 on the second board 240. The preload component 400 can change the initial elastic force of the elastic element 340. By changing the initial elastic force of the elastic element 340, the clamping force when the third board 330 just contacts the PCB and before compressing the elastic element 340 can be maintained at a certain value. The certain value is the initial elastic force of the elastic element 340 changed by the preload component 400. Specifically, the preload component 400 includes: a telescopic component 410 and a pressure column 420.

[0045] The telescopic component 410 is a cylinder, which is fixed to the second plate 240. The output end of the cylinder is fixed to the pressure column 420, and the cylinder can drive the pressure column 420 to move. The pressure column 420 is cylindrical and is fixed to the elastic component 340. The pressure column 420 can be driven by the telescopic component 410 to compress or stretch the elastic component 340.

[0046] In use, the telescopic component 410 is activated to move the pressure column 420, which compresses the elastic component 340 to a predetermined elastic value. This predetermined elastic value is applied to the third plate 330. When the clamping force between the third plate 330 and the PCB board is less than this predetermined value, the elastic component 340 will not be further compressed. When the clamping force between the third plate 330 and the PCB board is greater than this predetermined value, the elastic component 340 will be further compressed. At this point, the operator can clearly know that the clamping force has reached the vicinity of this predetermined value and can stop applying the clamping force. This allows the clamping force to be controlled within the predetermined elastic value, preventing damage to the PCB board due to excessive clamping force and improving the safety of the device.

[0047] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A flipping mechanism for PCB board testing, characterized in that, include: The first plate (100) is rotatable; The clamping assembly (200) includes two second plates (240) that can be driven to move closer or further away from each other at the same distance, so that the PCB board is clamped in a fixed position between the two second plates (240); Two elastic components (300) are respectively mounted on two second plates (240), and the elastic components (300) are capable of elastic contact with the PCB board; Two preload components (400) are respectively mounted on two second plates (240), and the preload components (400) are capable of changing the initial elastic force of the elastic component (300).

2. The PCB board testing flipping mechanism according to claim 1, characterized in that, The surface of the first plate (100) is provided with a groove (110), and part of the structure of the clamping assembly (200) is installed in the groove (110).

3. The PCB board testing flipping mechanism according to claim 2, characterized in that, The clamping assembly (200) includes: A bidirectional lead screw (210) is rotatably mounted in a slide groove (110) and the bidirectional lead screw (210) passes through the first plate (100). A drive unit (220) is capable of driving the bidirectional lead screw (210) to rotate; Two sliders (230) are threaded onto a two-way lead screw (210). The two sliders (230) are symmetrically arranged and can slide along a groove (110).

4. The PCB board testing flipping mechanism according to claim 3, characterized in that, The two second plates (240) are fixed to the two sliders (230) respectively.

5. The PCB board testing flipping mechanism according to claim 4, characterized in that, The elastic component (300) includes: Two rods (310) pass through the second plate (240) and are able to slide along the second plate (240); Two limiting members (320) are fixedly installed at one end of the two rods (310), and the limiting members (320) can prevent the rods (310) from detaching from the second plate (240). The third plate (330) is fixedly installed at the other end of the two rods (310), and the third plate (330) can contact the PCB board; An elastic element (340) is installed between the second plate (240) and the third plate (330).

6. The PCB board testing flipping mechanism according to claim 5, characterized in that, The limiting member (320) is a disc, and the diameter of the disc is larger than that of the rod (310).

7. The PCB board testing flipping mechanism according to claim 5, characterized in that, The elastic element (340) is a spring, and the two ends of the spring are fixed to the second plate (240) and the third plate (330) respectively.

8. The PCB board testing flipping mechanism according to claim 5, characterized in that, The preload component (400) can change the initial elastic force of the elastic element (340).

9. The PCB board testing flipping mechanism according to claim 8, characterized in that, The preloaded component (400) includes: Telescopic component (410), which is fixedly installed on the second plate (240); A pressure column (420) is fixed to an elastic element (340), and the pressure column (420) can be driven by a telescopic element (410) to compress or stretch the elastic element (340).

10. The PCB board testing flipping mechanism according to claim 9, characterized in that, The telescopic component (410) is a cylinder, the cylinder is fixed to the second plate (240), and the output end of the cylinder is fixed to the pressure column (420).

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