A PCB circuit board detection device

Abstract

The application discloses a PCB circuit board detection device, which comprises a rack, a conveying mechanism for conveying the circuit board, a camera mechanism for image shooting detection of the circuit board and a turnover mechanism for turning over the circuit board; the conveying mechanism comprises an inner circulation conveying chain belt and a power assembly for controlling movement of the inner circulation conveying chain belt; the turnover mechanism comprises a plurality of supports arranged on the inner circulation conveying chain belt, a supporting assembly for supporting the circuit board after turnover and a conveying assembly for conveying the circuit board after turnover to the inner circulation conveying chain belt; the circuit board on the support is turned to the circuit board below, and the circuit board is turned over. The application has the effect of pipeline image detection of the PCB circuit, and greatly improves the detection efficiency and the detection quality.

Description

Technical Field

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

[0002] During the production process, PCB circuit boards require appearance inspection. This is typically done by using a camera to capture images of both the front and back of the PCB, which are then compared to preset images using a computer system to complete the appearance inspection. During this inspection, the PCB may need to be flipped. Currently, this is most commonly done using a robotic arm, which first clamps the circuit board and then flips it over.

[0003] The process of inspecting PCBs involves first performing image inspection on one side, then using a robotic arm to flip the PCB before placing it in the inspection station. This process is cumbersome, and the robotic arm's repeated clamping is difficult to control, which can easily cause scratches or damage to the PCB. Therefore, the PCB inspection and flipping process needs to be optimized. Summary of the Invention

[0004] To address the cumbersome process of flipping PCB circuit boards, this application provides a PCB circuit board inspection device.

[0005] The PCB circuit board testing device provided in this application adopts the following technical solution:

[0006] A PCB circuit board inspection device includes a frame, a conveying mechanism for conveying the circuit board, a camera mechanism for capturing and inspecting images of the circuit board, and a flipping mechanism for flipping the circuit board.

[0007] The conveying mechanism includes an internal circulation conveyor belt and a power component for controlling the movement of the internal circulation conveyor belt;

[0008] The flipping mechanism includes multiple brackets disposed on the inner circulation conveyor belt, a support component for supporting the flipped circuit board, and a conveying component for conveying the flipped circuit board to the inner circulation conveyor belt.

[0009] The circuit board on the support rotates with the inner circulation conveyor belt until it is below it, after which the circuit board flips over.

[0010] Optionally, the support assembly includes a support frame rotatably mounted on the bracket, a support motor for controlling the rotation of the support frame, and a suspension part for suspending the circuit board. The support frame is U-shaped, with its opening rotatably connected to two opposite side walls of the bracket. The axis of rotation of the support frame and the bracket is perpendicular to the conveying direction of the inner circulating conveyor belt. The suspension part includes multiple suspension cloths, multiple feed cloths, and a winding assembly for winding the suspension cloths and the feed cloths. The suspension cloths and the feed cloths are spaced apart. The feed cloths have a feed opening for the circuit board to fall. The suspension cloths support the circuit board. After the support frame rotates 180°, the suspension cloths are positioned above the circuit board. The area of ​​the suspension cloths is larger than the area of ​​the circuit board, and the area of ​​the feed cloths is the same as that of the suspension cloths. The feed opening size of the feed cloths is also larger than the end face size of the circuit board.

[0011] Optionally, the winding assembly includes two winding motors and two winding rollers. One winding roller is rotatably mounted on the support frame in a lateral position, and the other winding roller is rotatably mounted on the bracket. In the initial state, the two winding rollers are located on the same side of the bracket.

[0012] Optionally, the conveying assembly includes a conveying frame slidably disposed on the frame, a lifting frame lifted and lowered on the conveying frame, a leather piece movably disposed on the lifting frame, a control unit for controlling the tilt of the leather piece, and a lifting unit for conveying the flipped circuit board to the support. The leather piece is in a horizontal state in the initial state, and in the initial state, the corresponding hanging cloth is located between the support frame and the support, that is, the hanging cloth is freely placed on the support.

[0013] Optionally, the control unit includes multiple base cylinders, a slide rod slidably disposed within the base cylinders, a control frame, an electromagnet for connecting the base cylinders and the slide rods, and a reset component for resetting the slide rods. The slide rods are slidably disposed within the base cylinders, the control frame is fixed to the top of the slide rods, and the control frame is connected to the bottom of the leather piece. The multiple base cylinders are evenly spaced along the length of the leather piece, and the inner wall of each base cylinder is provided with mounting holes. The electromagnets are fixed within the mounting holes and attract the peripheral wall of the slide rods.

[0014] Optionally, the lifting unit includes a lifting frame that is lifted and lowered on the frame, a lifting plate that is slidably disposed on the lifting frame, a lifting electric push rod for lifting the lifting frame, and a pusher group for conveying the circuit board on the lifting plate to the inner circulation conveyor belt, wherein one end of the leather piece is lowered to above the lifting plate.

[0015] Optionally, the control frame is also configured as a U-shape, and the size of the notch of the control frame is larger than the size of the circuit board in the corresponding direction.

[0016] Optionally, the pushing assembly includes a pushing belt driven on the lifting plate, the pushing belt being lifted to the same level as the plane where the support is located.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. The conveying mechanism is used to convey the circuit board to the camera position. After one side of the circuit board is inspected, the circuit board is flipped by the flipping mechanism and then conveyed to the camera position by the conveying mechanism. Therefore, in this embodiment of the application, when inspecting the circuit board, it is not necessary to repeatedly use the robotic arm to clamp it. At the same time, it can also perform assembly line inspection, which greatly improves the inspection efficiency and inspection accuracy.

[0019] 2. After one side of the circuit board is inspected and the circuit board leaves the shooting station, the support motor controls the support frame to rotate 180°. During this process, the suspension cloth is pulled above the circuit board until the support frame flips to the other side of the bracket, so that the bracket can move to the bottom of the inner circulation conveyor belt. After the circuit board begins to flip, the suspension cloth supports the circuit board, thus achieving the flipping effect of the circuit board. Through the cooperation of two winding rollers, the suspension cloth can be wound and the unloading cloth is pulled outward until the unloading port is at the position of the circuit board. At the same time, the lifting frame moves to a position close to the unloading cloth, and the circuit board falls onto the leather piece on the support frame. The purpose of using the leather piece is to reduce damage to the circuit board.

[0020] 3. When the leather plate receives the circuit board, the lifting plate is located below the leather plate. At this time, the vertical position of the leather plate and the lifting plate needs to be adjusted until the lowest point of the leather plate is on the same plane as or higher than the plane of the lifting plate after it is lowered. After the electromagnet is de-energized, the control frame at the corresponding end of the leather plate also slides down in the bottom cylinder along with the slide rod. The other slide rod remains in place, and the end of the leather plate closest to the lifting plate descends. The circuit board slides down onto the lifting plate under its own weight. Subsequently, the lifting plate needs to transport the flipped circuit board to the support. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0022] Figure 2 This is a cross-sectional view of an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the conveying component according to an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the supporting components in an embodiment of this application.

[0025] Reference numerals: 1. Frame; 2. Internal circulating conveyor belt; 3. Support; 4. Camera mechanism; 5. Support frame; 6. Support motor; 7. Suspension cloth; 8. Feed cloth; 9. Winding roller; 10. Feeding port; 11. Conveyor frame; 12. Lifting frame; 13. Leather sheet; 14. Bottom cylinder; 15. Slide rod; 16. Control frame; 17. Electromagnet; 18. Airbag; 19. Mounting hole; 20. Lifting frame; 21. Lifting plate; 22. Lifting electric push rod; 23. Push belt; 24. Winding motor. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0027] This application discloses a PCB circuit board testing device. (Refer to...) Figures 1-4 A PCB circuit board inspection device includes a frame 1, a conveying mechanism for transporting the circuit board, a camera mechanism 4 for image capture and inspection of the circuit board, and a flipping mechanism for flipping the circuit board. The camera mechanism 4 employs a camera, an image recognition sensor, and a software system for comparing a standard image of the circuit board with an existing image of the circuit board. Since prior art is used for comparison, it will not be described in detail in this embodiment. Furthermore, the conveying mechanism transports the circuit board to the camera mechanism 4. After one side of the circuit board is inspected, the flipping mechanism flips the circuit board and then transports it to the camera mechanism 4 again. Therefore, in this embodiment, the circuit board does not need to be repeatedly gripped by a robotic arm during inspection, and a streamlined inspection process can be implemented, greatly improving inspection efficiency and accuracy.

[0028] The conveying mechanism includes an inner circulation conveyor belt 2 and a power component for controlling the movement of the inner circulation conveyor belt 2; the power component includes a power motor and two power rollers, the inner circulation conveyor belt 2 is sleeved on the two power rollers, and the movement effect of the inner circulation conveyor belt 2 is achieved under the friction between the inner circulation conveyor belt 2 and the power rollers.

[0029] The flipping mechanism includes multiple brackets 3 mounted on the inner circulating conveyor belt 2, a support component for supporting the flipped circuit board, and a conveying component for conveying the flipped circuit board to the inner circulating conveyor belt 2. The brackets 3 are made of plastic material, and the connection structure between the brackets 3 and the inner circulating conveyor belt 2 is also made of plastic material. After the circuit board on the bracket 3 rotates to its lower position with the inner circulating conveyor belt 2, the circuit board is flipped. As the inner circulating conveyor belt 2 conveys the circuit board to its bottom surface, the flipping effect of the circuit board is completed under the action of the support component. At the same time, the flipped circuit board is conveyed to the camera mechanism 4 through the conveying component to complete the flipping and double-sided inspection of the circuit board.

[0030] The support assembly includes a support frame 5 rotatably mounted on the bracket 3, a support motor 6 for controlling the rotation of the support frame 5, and a suspension part for suspending the circuit board. The support frame 5 is U-shaped, and the two sides of the opening of the support frame 5 are rotatably connected to the two opposite side walls of the bracket 3 respectively. The axis of rotation of the support frame 5 and the bracket 3 is along the conveying direction perpendicular to the inner circulation conveyor belt 2. The support frame 5 and the suspension cloth 7 are similar to the structure of a convertible car. That is, in the initial state, the support frame 5 is on one side of the bracket 3 and the suspension part is also located on one side of the bracket 3. When the circuit board needs to be flipped, the support frame 5 needs to rotate at the same time, so that the flipped circuit board can be suspended.

[0031] The suspension part includes multiple suspension cloths 7, multiple feed cloths 8, and a winding assembly for winding the suspension cloths 7 and the feed cloths 8. The suspension cloths 7 and the feed cloths 8 are spaced apart. The feed cloths 8 are provided with feed openings 10 for the circuit board to fall. The suspension cloths 7 are used to support the circuit board. After the support frame 5 is rotated 180°, the suspension cloths 7 are located above the circuit board. Both the suspension cloths 7 and the feed cloths 8 are made of non-woven fabric or plastic material. The area of ​​the suspension cloths 7 is larger than the area of ​​the circuit board. The area of ​​the feed cloths 8 is the same as that of the suspension cloths 7. The size of the feed opening 10 of the feed cloths 8 is also larger than the end face size of the circuit board, which facilitates the circuit board to fall from the feed opening 10.

[0032] The winding assembly includes two winding motors 24 and two winding rollers 9. One winding roller 9 is rotatably positioned on the transverse side of the support frame 5, and the other winding roller 9 is rotatably positioned on the bracket 3. In the initial state, the two winding rollers 9 are located on the same side of the bracket 3, and the axial direction of the winding roller 9 is perpendicular to the conveying direction of the inner circulation conveyor belt 2. In the initial state, the corresponding hanging cloth 7 is already located between the support frame 5 and the bracket 3, that is, the hanging cloth 7 is freely placed on the bracket 3. After the circuit board is photographed and detected on one side, the circuit board leaves the photographing station. An infrared sensor can be set on the frame 1 to determine whether the circuit board is far away from the photographing station. As long as the circuit board is far away from the photographing station, the support motor 6 controls the support frame 5 to rotate 180°. During this process, the hanging cloth 7 is pulled to the top of the circuit board until the support frame 5 flips to the other side of the bracket 3, so that the bracket 3 can move to the bottom surface of the inner circulation conveyor belt 2. After the circuit board starts to flip, the hanging cloth 7 supports the circuit board, thereby achieving the flipping effect of the circuit board.

[0033] The conveying assembly includes a conveyor frame 11 slidably mounted on the frame 1, a lifting frame 12 lifted and lowered on the conveyor frame 11, a sheet 13 movably mounted on the lifting frame 12, a control unit for controlling the tilt of the sheet 13, and a lifting unit for conveying the flipped circuit board to the support 3. The sheet 13 is initially horizontal. The conveyor frame 11 moves along the length of the inner circulating conveyor belt 2, and the lifting frame 12 moves vertically. The lifting and lowering of the lifting frame 12 and the movement of the conveyor frame 11 are both achieved by electric actuators. In this embodiment, the sheet 13 changes from a horizontal state to an inclined state, i.e., when the circuit board... After the fabric moves to the inner circulation conveyor belt 2 and is flipped, the two winding rollers 9 cooperate with each other. The winding roller 9 on the support frame 5 starts to wind the hanging fabric 7, while the winding roller 9 on the bracket 3 starts to release the unloading fabric 8. This allows the hanging fabric 7 to be wound and the unloading fabric 8 to be pulled outward until the unloading port 10 is at the position of the circuit board. At the same time, the lifting frame 12 moves to a position close to the unloading fabric 8, and the circuit board falls onto the leather piece 13 on the support frame 5. The purpose of using the leather piece 13 is to reduce damage to the circuit board.

[0034] The lifting section is located at one open end of the inner circulation conveyor belt 2. In this embodiment, the end where the circuit board is first placed on the inner circulation conveyor belt 2 is considered the open end, and one end is set as the end. Therefore, the lifting section is located at the open position of the inner circulation conveyor belt 2, which facilitates the subsequent transport of the circuit board to the shooting station by the inner circulation conveyor belt 2. After the leather piece 13 carries the circuit board to the position of the lifting section, it is necessary to transport the circuit board to the position of the lifting section. In this embodiment, the circuit board slides off the leather piece 13 after the leather piece 13 is tilted.

[0035] The control unit includes multiple base cylinders 14, slide rods 15 slidably disposed within the base cylinders 14, a control frame 16, electromagnets 17 for connecting the base cylinders 14 and the slide rods 15, and a reset component for resetting the slide rods 15. The slide rods 15 are slidably disposed within the base cylinders 14, and the control frame 16 is fixed to the top of the slide rods 15. The control frame 16 is connected to the bottom of the leather plate 13. The multiple base cylinders 14 are evenly spaced along the length of the leather plate 13. The inner wall of the base cylinder 14 is provided with mounting holes 19. The electromagnets 17 are fixed within the mounting holes 19 and attract the peripheral wall of the slide rods 15. In this embodiment, only two base cylinders 14 are needed, located on the lifting frame 1. On both sides of 2, the control frame 16 is also set in a U-shape. The size of the notch of the control frame 16 is larger than the size of the circuit board in the corresponding direction. That is, the size of the notch of the control frame 16 is larger than the width of the circuit board, so as to ensure that the circuit board will not fall off the control frame 16 and the leather piece 13, but can only slide down along the length of the leather piece 13. The tops of the two slide rods 15 are at the same horizontal plane, thus ensuring that the leather piece 13 is in a horizontal state in the initial state. Moreover, after the electromagnet 17 attracts the slide rod 15, it achieves the locking effect between the bottom cylinder 14 and the slide rod 15. At this time, the leather piece 13 is used to receive the circuit board falling from the feed cloth 8.

[0036] The lifting section includes a lifting frame 20 mounted on the frame 1, a lifting plate 21 slidably mounted on the lifting frame 20, a lifting electric push rod 22 for lifting the lifting frame 20, and a pusher assembly for conveying the circuit board on the lifting plate 21 to the inner circulating conveyor belt 2. One end of the sheet 13 descends above the lifting plate 21. The lifting frame 20 moves vertically, and the vertical plane where the lifting plate 21 is initially located is a certain distance away from the opening end of the inner circulating conveyor belt 2. This distance ensures the distance required for the support 3 to rotate with the inner circulating conveyor belt 2. When the sheet 13 receives the circuit board, this... When the lifting plate 21 is located below the leather piece 13, the vertical position of the leather piece 13 and the lifting plate 21 needs to be adjusted until the lowest end of the leather piece 13 is on the same plane as or higher than the plane of the lifting plate 21 after it is lowered. At this time, after the electromagnet 17 is de-energized, the control frame 16 at the corresponding end of the leather piece 13 also slides down in the bottom cylinder 14 along with the slide rod 15. The other slide rod 15 remains in place, and the end of the leather piece 13 that is close to the lifting plate 21 descends. The circuit board slides down onto the lifting plate 21 under its own weight. Subsequently, the lifting plate 21 needs to transport the flipped circuit board to the bracket 3.

[0037] The reset component includes an airbag 18, which is located at the bottom of the base cylinder 14. The air supply component of the airbag 18 is located on the lifting frame 12. The airbag 18 is used to push the slide bar 15 upward inside the base cylinder 14. In this embodiment, the air supply device is located on the lifting frame 12 and connected to the air inlet of the airbag 18. The airbag 18 is located in the space at the bottom end of the slide bar 15 inside the base cylinder 14. The airbag 18 can also buffer the slide bar 15 during its descent. When the slide bar 15 compresses the airbag 18 to its limit, one end of the skin 13 also descends to the designated position. When it is necessary to reset the slide bar 15, the airbag 18 can be inflated. After the slide bar 15 rises to the designated position, an infrared transmitter can also be installed inside the base cylinder 14, and an infrared receiver can be installed on the side wall of the slide bar 15. Therefore, when the infrared receiver receives the signal from the infrared transmitter, the infrared receiver controls the electromagnet 17 to be energized and attracts the slide bar 15. At this time, the skin 13 is in a horizontal state. Of course, the reset component can also be set as an electric actuator. The electric actuator is set at the bottom of the bottom cylinder 14, and the output end of the electric actuator abuts against the bottom end of the slide bar 15. The electric actuator is mainly used to achieve the reset effect of the slide bar.

[0038] The lifting plate 21 moves along the conveying direction of the inner circulation conveyor belt 2 on the lifting frame 20. The movement of the lifting plate 21 on the lifting frame 20 is achieved by an electric push rod. The lifting plate 21 is L-shaped, with its vertical section connected via the output end of the electric push rod, while its horizontal section is located outside the lifting frame 20. Specifically, one end of the lifting plate 21 is located outside the lifting frame 20. When the lifting plate 21 and the lifting frame 20 rise to the same plane as the support 3, the lifting plate 21 can be pushed towards the support 3 to facilitate the circuit board movement. The feeding and pushing assembly includes a pushing belt 23 driven on the lifting plate 21. The pushing belt 23 is lifted to the same level as the plane where the support 3 is located. Similarly, the conveying of the pushing belt 23 is also driven by two pushing rollers and a pushing motor, thereby achieving the driving effect of the pushing belt 23. When the lifting plate 21 drives the pushing belt 23 to move towards the support 3, until the pushing belt 23 is close to the support 3, the pushing belt 23 is turned on to transport the circuit board on the pushing belt 23 to the position of the support 3. The lifting plate 21 and the lifting frame 20 return to the initial position.

[0039] The implementation principle of the PCB circuit board inspection device in this application embodiment is as follows: After one side of the circuit board is inspected, the circuit board leaves the shooting station. The support motor 6 controls the support frame 5 to rotate 180°. During this process, the hanging cloth 7 is already piled on the support 3. Therefore, the hanging cloth 7 can be pulled up to the top of the circuit board along with the support frame 5. After the support frame 5 flips to the other side of the support 3, the entire hanging cloth 7 can completely cover the circuit board, so that the support 3 can move to the bottom of the inner circulation conveyor belt 2. After the circuit board starts to flip, the hanging cloth 7 supports the circuit board, thereby achieving the flipping effect of the circuit board. Through the cooperation of two winding rollers 9, the winding roller 9 on the support frame 5 starts to wind the hanging cloth 7, while the winding roller 9 on the support 3 releases the unloading cloth 8, thereby winding the hanging cloth 7 and pulling the unloading cloth 8 outward until the unloading port 10 is at the position of the circuit board. At the same time, the lifting frame 12 moves to a position close to the unloading cloth 8, and the circuit board falls onto the leather piece 13 on the support frame 5. The effect of using the leather piece 13 is to reduce damage to the circuit board.

[0040] When the leather plate 13 receives the circuit board, the lifting plate 21 is located below the leather plate 13. At this time, the vertical position of the leather plate 13 and the lifting plate 21 needs to be adjusted until the lowest point of the leather plate 13 is on the same plane as or higher than the plane of the lifting plate 21. After the electromagnet 17 is de-energized, the control frame 16 at the corresponding end of the leather plate 13 also slides down in the bottom cylinder 14 along with the slide rod 15. The other slide rod 15 remains in place, and the end of the leather plate 13 near the lifting plate 21 descends. The circuit board slides down onto the lifting plate 21 under its own weight. Subsequently, the lifting plate 21 needs to transport the flipped circuit board to the bracket 3. When the lifting plate 21 and the lifting frame 20 rise to the same plane as the plane of the bracket 3, the lifting plate 21 can be pushed towards the bracket 3 until the push belt 23 is close to the bracket 3. The push belt 23 is then turned on to transport the circuit board on the push belt 23 to the position of the bracket 3. The lifting plate 21 and the lifting frame 20 return to their initial positions.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A PCB circuit board testing device, characterized in that: It includes a frame (1), a conveying mechanism for conveying circuit boards, a camera mechanism (4) for capturing and detecting images of circuit boards, and a flipping mechanism for flipping circuit boards. The conveying mechanism includes an inner circulation conveyor belt (2) and a power component for controlling the movement of the inner circulation conveyor belt (2); The flipping mechanism includes multiple brackets (3) disposed on the inner circulation conveyor belt (2), a support component for supporting the flipped circuit board, and a conveying component for conveying the flipped circuit board to the inner circulation conveyor belt (2). The circuit board on the bracket (3) rotates with the inner circulation conveyor belt (2) until it is below it, after which the circuit board flips over. The support assembly includes a support frame (5) rotatably mounted on the bracket (3), a support motor (6) for controlling the rotation of the support frame (5), and a suspension part for suspending the circuit board. The support frame (5) is U-shaped, and the two sides of the opening of the support frame (5) are rotatably connected to the two opposite side walls of the bracket (3). The axis of rotation of the support frame (5) and the bracket (3) is along the conveying direction perpendicular to the inner circulation conveyor belt (2). The suspension part includes multiple suspension cloths (7), multiple feed cloths (8), and a winding group for winding the suspension cloths (7) and the feed cloths (8). The suspension cloths (7) and the feed cloths (8) are spaced apart. The feed cloths (8) are provided with feed openings (10) for the circuit board to fall. The suspension cloths (7) are used to support the circuit board. After the support frame (5) is rotated 180°, the suspension cloths (7) are located above the circuit board. The area of ​​the suspension cloths (7) is larger than the area of ​​the circuit board. The area of ​​the feed cloths (8) is the same as that of the suspension cloths (7). The size of the feed opening (10) of the feed cloths (8) is also larger than the end face size of the circuit board.

2. The PCB circuit board testing device according to claim 1, characterized in that: The winding assembly includes two winding motors (24) and two winding rollers (9). One winding roller (9) is rotatably mounted on the lateral position of the support frame (5), and the other winding roller (9) is rotatably mounted on the bracket (3). In the initial state, the two winding rollers (9) are located on the same side of the bracket (3). In the initial state, the corresponding hanging cloth (7) is located between the support frame (5) and the bracket (3), that is, the hanging cloth (7) is freely placed on the bracket (3).

3. The PCB circuit board testing device according to claim 1, characterized in that: The conveying assembly includes a conveyor frame (11) slidably disposed on the frame (1), a lifting frame (12) lifted and lowered on the conveyor frame (11), a leather piece (13) movably disposed on the lifting frame (12), a control unit for controlling the tilt of the leather piece (13), and a lifting unit for conveying the flipped circuit board to the support (3). The leather piece (13) is in a horizontal state in the initial state.

4. The PCB circuit board testing device according to claim 3, characterized in that: The control unit includes multiple base cylinders (14), a slide rod (15) slidably disposed within the base cylinder (14), a control frame (16), an electromagnet (17) for connecting the base cylinder (14) and the slide rod (15), and a reset member for resetting the slide rod (15). The slide rod (15) is slidably disposed within the base cylinder (14), the control frame (16) is fixed to the top of the slide rod (15), and the control frame (16) is connected to the bottom of the leather piece (13). The multiple base cylinders (14) are evenly distributed along the length direction of the leather piece (13). The inner wall of the base cylinder (14) is provided with mounting holes (19), and the electromagnet (17) is fixed within the mounting holes (19) and adsorbs the peripheral wall of the slide rod (15).

5. The PCB circuit board testing device according to claim 4, characterized in that: The lifting unit includes a lifting frame (20) that is lifted and lowered on the frame (1), a lifting plate (21) that is slidably disposed on the lifting frame (20), a lifting electric push rod (22) for lifting the lifting frame (20), and a pusher group for conveying the circuit board on the lifting plate (21) to the inner circulation conveyor belt (2). One end of the leather piece (13) descends to above the lifting plate (21).

6. The PCB circuit board testing device according to claim 5, characterized in that: The control frame (16) is also configured as a U-shape and the size of the notch of the control frame (16) is larger than the size of the circuit board in the corresponding direction.

7. A PCB circuit board testing device according to claim 6, characterized in that: The pushing assembly includes a pushing belt (23) driven on the lifting plate (21), and the pushing belt (23) is lifted to the same level as the plane where the bracket (3) is located.

Images