PCB (Printed Circuit Board) detection device

Abstract

The invention discloses a PCB detection device. The PCB detection device comprises a rack, a conveying mechanism used for conveying a circuit board, a camera shooting mechanism used for carrying out image shooting detection on the circuit board and a turn-over mechanism used for turning over the circuit board. The conveying mechanism comprises an inner circulation conveying chain belt and a power assembly used for controlling the inner circulation conveying chain belt to move. The turn-over mechanism comprises a plurality of supports arranged on the inner circulation conveying chain belt, a supporting assembly used for supporting the turned-over circuit board and a conveying assembly used for conveying the turned-over circuit board to the inner circulation conveying chain belt. The circuit board on the support rotates to the position below the inner circulation conveying chain belt along with the inner circulation conveying chain belt and then is turned over. The PCB circuit image detection device has the effect of carrying out image detection on the PCB circuit on an assembly line, and the detection efficiency and the detection quality are greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of circuit board detection, and particularly to a PCB circuit board detection device. Background Art

[0002] During the production process of a PCB circuit board, its appearance needs to be detected. Generally, a camera mechanism takes pictures of the front and back sides of the PCB board, and then through a computer system, it is compared with a preset image to complete the appearance detection of the PCB board. During the appearance detection of the PCB board, the PCB board needs to be turned over. Currently, the most common method is to use a manipulator to first clamp the circuit board and then turn it over.

[0003] Since during the detection process of the PCB circuit board, after the image of one side is detected first, then the manipulator is used to turn it over and then the PCB circuit board is placed on the detection station. The whole process is cumbersome, and the manipulator reciprocally clamps and is not easy to control the clamping force, which is likely to cause scratches on the PCB board or damage the PCB board. Therefore, it is necessary to optimize the work of turning over the PCB board for detection. Summary of the Invention

[0004] In order to improve the cumbersome problem of flipping the PCB circuit board, this application provides a PCB circuit board detection device.

[0005] A PCB circuit board detection device provided by this application adopts the following technical solutions: A PCB circuit board detection device includes a frame, a conveying mechanism for conveying the circuit board, a camera mechanism for performing image shooting and detection on the circuit board, and a flipping mechanism for flipping the circuit board; The conveying mechanism includes an inner circulating conveyor belt and a power component for controlling the movement of the inner circulating conveyor belt; The flipping mechanism includes a plurality of brackets arranged on the inner circulating conveyor belt, a supporting component for supporting the circuit board after flipping, and a conveying component for conveying the circuit board after flipping onto the inner circulating conveyor belt; After the circuit board on the bracket rotates with the inner circulating conveyor belt to its lower side, the circuit board is flipped.

[0006] Optionally, the support assembly includes a support frame rotatably arranged 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 arranged in a concave shape, and both sides of the opening of the support frame are respectively rotatably connected to the two opposite side walls of the bracket. The axis direction of the rotation of the support frame and the bracket is along the direction perpendicular to the conveying direction of the inner circulation conveyor belt. The suspension part includes a plurality of suspension cloths, a plurality of blanking cloths, and a winding group for winding the suspension cloths and the blanking part. The suspension cloths and the blanking cloths are arranged at intervals. The blanking cloth is provided with a blanking opening for the circuit board to fall. The suspension cloth is used to support the circuit board. After the support frame rotates 180°, the suspension cloth is located above the circuit board. The area of the suspension cloth is larger than the area of the circuit board. The area of the blanking cloth is the same as that of the suspension cloth, and the size of the blanking opening of the blanking cloth is also larger than the end face size of the circuit board.

[0007] Optionally, the winding group includes two winding motors and two winding rollers. One winding roller is rotatably arranged at the horizontal position of the support frame, and the other winding roller is rotatably arranged on the bracket. In the initial state, the two winding rollers are located on the same side of the bracket.

[0008] Optionally, the conveying assembly includes a conveying frame slidably arranged on the machine frame, a lifting frame arranged on the conveying frame in a lifting manner, a leather piece movably arranged on the lifting frame, a control part for controlling the inclination of the leather piece, and a lifting part for conveying the circuit board after being turned over to the bracket. The leather piece is in a horizontal state in the initial state. In the initial state, the corresponding suspension cloth is located between the support frame and the bracket, that is, the suspension cloth is freely placed on the bracket.

[0009] Optionally, the control part includes a plurality of bottom cylinders, a sliding rod slidably arranged in the bottom cylinder, a control frame, an electromagnet for connecting the bottom cylinder and the sliding rod, and a reset part for resetting the sliding rod. The sliding rod is slidably arranged in the bottom cylinder. The control frame is fixed at the top of the sliding rod. The control frame is connected to the bottom of the leather piece. The plurality of bottom cylinders are equidistantly distributed along the length direction of the leather piece. The inner wall of the bottom cylinder is provided with a mounting hole. The electromagnet is fixed in the mounting hole and adsorbs the peripheral wall of the sliding rod.

[0010] Optionally, the lifting part includes a lifting frame arranged on the machine frame in a lifting manner, a lifting plate slidably arranged on the lifting frame, a lifting electric push rod for lifting the lifting frame, and a pushing group for conveying the circuit board on the lifting plate to the inner circulation conveyor belt. One end of the leather piece descends to be above the lifting plate.

[0011] Optionally, the control frame is also configured to be in a concave shape and a notch size of the control frame is larger than a size of the circuit board in a corresponding direction.

[0012] Optionally, the pushing group includes a pushing belt that is driven on the lifting plate, and the pushing belt is lifted to be at the same level as the plane where the bracket is located.

[0013] In summary, the present application includes at least one of the following beneficial technical effects: 1. The conveying mechanism is used to convey the circuit board to the camera mechanism position. After the inspection of one side of the circuit board is completed, the circuit board is turned over by the flipping mechanism, and then the conveying mechanism is used to convey the circuit board to the camera mechanism position. Therefore, in the embodiment of the present application, when inspecting the circuit board, it is not necessary to repeatedly clamp the circuit board using a robot, and the inspection operation can also be streamlined, which greatly improves the inspection efficiency and inspection accuracy; 2. When the inspection of one side of the circuit board is completed, the circuit board leaves the shooting station, and the support motor controls the support frame to rotate 180°. During this process, the suspension cloth is pulled to the top of the circuit board until the support frame flips to the other side of the support frame, so that the support frame can move to the bottom of the inner circulation conveyor chain. After the circuit board starts to turn over, the suspension cloth supports the circuit board, thereby achieving the effect of turning over the circuit board; through the cooperation of the 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 sheet on the support frame. The effect of using the leather sheet is to reduce the damage to the circuit board; 3. When the leather piece receives the circuit board, the lifting plate is located below the leather piece. At this time, the vertical position of the leather piece and the lifting plate needs to be adjusted until the leather piece is lowered and its lowest end is in the same plane as the lifting plate or higher than the plane where the lifting plate is located. At this time, after the electromagnet is powered off, the control frame at the corresponding end of the leather piece also slides down in the bottom tube with the slide bar, and the other slide bar remains in place. Then, the leather piece descends to the position close to one end of the lifting plate, and the circuit board slides down onto the lifting plate under its own weight. Subsequently, the lifting plate is required to transport the flipped circuit board to the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a cross-sectional view of an embodiment of the present application; Figure 3 is a schematic diagram of a conveying assembly according to an embodiment of the present application; Figure 4 It is a schematic diagram of the support assembly of an embodiment of the present application.

[0015] Reference signs: 1, frame; 2, inner circulation conveyor belt; 3, bracket; 4, camera mechanism; 5, support frame; 6, support motor; 7, hanging cloth; 8, blanking cloth; 9, winding roller; 10, blanking port; 11, conveying frame; 12, lifting frame; 13, leather piece; 14, bottom cylinder; 15, sliding rod; 16, control frame; 17, electromagnet; 18, airbag; 19, mounting hole; 20, lifting frame; 21, lifting plate; 22, lifting electric push rod; 23, pushing belt; 24, winding motor. Detailed implementation manners

[0016] The following will further elaborate on this application Figures 1-4 in conjunction with the attached drawings.

[0017] An embodiment of this application discloses a PCB circuit board detection device. Refer to Figures 1-4 , a PCB circuit board detection device includes a frame 1, a conveying mechanism for conveying the circuit board, a camera mechanism 4 for performing image shooting and detection on the circuit board, and a turning-over mechanism for turning over the circuit board; the camera mechanism 4 adopts a camera, an image recognition sensor, and a software system for comparing the standard image of the circuit board with the existing image of the circuit board. By comparing with the prior art, it will not be elaborated in this embodiment. In addition, the conveying mechanism is used to convey the circuit board to the position of the camera mechanism 4. After one side of the circuit board is detected, when the circuit board is turned over by the turning-over mechanism, it is then conveyed to the position of the camera mechanism 4 by the conveying mechanism. Therefore, when detecting the circuit board in the embodiment of this application, it is not necessary to repeatedly clamp with a manipulator, and at the same time, it can perform detection operations in a production line, greatly improving the detection efficiency and detection accuracy.

[0018] The conveying mechanism includes an inner circulation conveyor belt 2 and a power assembly for controlling the movement of the inner circulation conveyor belt 2; the power assembly includes a power motor and two power rollers. The inner circulation conveyor belt 2 is sleeved outside the two power rollers. Under the frictional force between the inner circulation conveyor belt 2 and the power rollers, the movement effect of the inner circulation conveyor belt 2 is achieved; The turning-over mechanism includes a plurality of brackets 3 arranged on the inner circulation conveyor belt 2, a support assembly for supporting the circuit board after turning over, and a conveying assembly for conveying the circuit board after turning over to the inner circulation conveyor belt 2; the bracket 3 can be made of plastic material. In addition, the connection structure between the bracket 3 and the inner circulation conveyor belt 2 is also made of plastic material. The circuit board on the bracket 3 rotates with the inner circulation conveyor belt 2 to its lower side and then the circuit board is turned over. As the inner circulation conveyor belt 2 conveys the circuit board to its bottom surface, under the action of the support assembly, the turning-over effect of the circuit board is completed. At the same time, through the conveying assembly, the circuit board after turning over is conveyed to the position of the camera mechanism 4 to complete the turning-over and double-sided detection work of the circuit board.

[0019] The support assembly includes a support frame 5 rotatably arranged on the support 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 arranged in a concave shape. Both sides at the opening of the support frame 5 are rotatably connected to the two opposite side walls of the support 3. The axis direction of the rotation of the support frame 5 and the support 3 is along the direction perpendicular to the conveying direction of the inner circulation conveyor belt 2. The structure of the support frame 5 and the suspension cloth 7 is similar to that of a convertible car, that is, in the initial state, the support frame 5 is on one side of the support 3 and the suspension part is also on one side of the support 3. When the circuit board needs to be flipped, at the same time, the support frame 5 needs to rotate, so that the circuit board after being flipped can be suspended.

[0020] The suspension part includes a plurality of suspension cloths 7, a plurality of blanking cloths 8, and a winding group for winding the suspension cloth 7 and the blanking part. The suspension cloth 7 and the blanking cloth 8 are arranged at intervals. The blanking cloth 8 is provided with a blanking port 10 for the circuit board to fall. The suspension cloth 7 is used to support the circuit board. After the support frame 5 rotates 180°, the suspension cloth 7 is located above the circuit board. Both the suspension cloth 7 and the blanking cloth 8 are made of non-woven fabric or plastic material. And the area of the suspension cloth 7 is larger than the area of the circuit board. The area of the blanking cloth 8 is the same as that of the suspension cloth 7. The size of the blanking port 10 of the blanking cloth 8 is also larger than the end face size of the circuit board, so as to facilitate the circuit board to fall from the position of the blanking port 10.

[0021] The winding group includes two winding motors 24 and two winding rollers 9. One winding roller 9 is rotatably arranged at the horizontal position of the support frame 5, and the other winding roller 9 is rotatably arranged on the support 3. In the initial state, the two winding rollers 9 are on the same side of the support 3. The axis direction of the winding roller 9 is also perpendicular to the conveying direction of the inner circulation conveyor belt 2. And in the initial state, the corresponding suspension cloth 7 is already located between the support frame 5 and the support 3, that is, the suspension cloth 7 is freely placed on the support 3; when one side of the circuit board is photographed and detected, after the circuit board leaves the photographing station, an infrared sensor can be arranged on the frame 1, that is, to judge whether the circuit board is far away from the photographing station. As long as the circuit board is far away from the photographing station, at this time, the support motor 6 controls the support frame 5 to rotate 180°. In this process, the suspension cloth 7 is pulled above the circuit board until the support frame 5 is flipped to the other side of the support 3, so that the support 3 can move to the bottom surface of the inner circulation conveyor belt 2. After the circuit board starts to be flipped and the suspension cloth 7 supports the circuit board, the flipping effect of the circuit board can be realized.

[0022] The conveying assembly includes a conveying frame 11 slidably arranged on the frame 1, a lifting frame 12 arranged on the conveying frame 11 in a lifting manner, a leather piece 13 movably arranged on the lifting frame 12, a control part for controlling the inclination of the leather piece 13, and a lifting part for conveying the circuit board after being turned over onto the bracket 3. The leather piece 13 is in a horizontal state in the initial state. The conveying frame 11 moves along the length direction of the inner circulation conveying belt 2, and the lifting frame 12 moves up and down along the vertical direction. The lifting of the lifting frame 12 and the movement of the conveying frame 11 are both realized by electric push rods. In this embodiment, the leather piece 13 changes from a horizontal state to an inclined state, that is, when the circuit board moves to the lower part of the inner circulation conveying belt 2 and is turned over, through the cooperation of two winding rollers 9, the winding roller 9 located on the support frame 5 starts to wind the hanging cloth 7, and the winding roller 9 located on the bracket 3 starts to release the blanking cloth 8, so as to wind the hanging cloth 7 and pull the blanking cloth 8 outward until the blanking port 10 reaches the position of the circuit board, that is, the blanking cloth 8 and the blanking port 10 move to the position of the circuit board. At the same time, the lifting frame 12 moves to a position close to the blanking cloth 8, and the circuit board drops onto the leather piece 13 on the support frame 5. The effect of using the leather piece 13 is to reduce the damage to the circuit board.

[0023] The lifting part is located at the opening end of the inner circulation conveying belt 2. In this embodiment, it is determined that the end where the circuit board is initially placed on the inner circulation conveying belt 2 is the opening end, and one end is set as the end. Therefore, the lifting part is located at the opening position of the inner circulation conveying belt 2, which is convenient for the subsequent inner circulation conveying belt 2 to convey the circuit board to the shooting station. When the leather piece 13 carries the circuit board to the position of the lifting part, the circuit board needs to be conveyed to the position of the lifting part. In this embodiment, after the leather piece 13 is inclined, the circuit board slides off the leather piece 13.

[0024] The control unit includes a plurality of bottom cylinders 14, a sliding rod 15 slidably disposed within the bottom cylinder 14, a control frame 16, an electromagnet 17 for connecting the bottom cylinder 14 and the sliding rod 15, and a reset member for resetting the sliding rod 15. The sliding rod 15 is slidably disposed within the bottom cylinder 14. The control frame 16 is fixed to the top of the sliding rod 15. The control frame 16 is connected to the bottom of the leather piece 13. The plurality of bottom cylinders 14 are equally spaced along the length direction of the leather piece 13. An installation hole 19 is provided on the inner wall of the bottom cylinder 14. The electromagnet 17 is fixed within the installation hole 19 and adsorbs the peripheral wall of the sliding rod 15. In this embodiment, two bottom cylinders 14 are provided, respectively located on both sides of the lifting frame 12. The control frame 16 is also provided in a concave 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 direction size of the circuit board, so as to ensure that the circuit board will not fall off from the control frame 16 and the leather piece 13, and can only slide along the length direction of the leather piece 13. The tops of the two sliding rods 15 are at the same horizontal plane, thereby ensuring that the leather piece 13 is in a horizontal state in the initial state. Moreover, after the electromagnet 17 adsorbs the sliding rod 15, the locking effect of the position between the bottom cylinder 14 and the sliding rod 15 is achieved. At this time, the leather piece 13 is used to receive the circuit board falling from the blanking cloth 8.

[0025] The lifting unit includes a lifting frame 20 vertically lifted on the frame 1, a lifting plate 21 slidably disposed on the lifting frame 20, a lifting electric push rod 22 for lifting the lifting frame 20, and a pushing 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. The lifting frame 20 is lifted vertically, and the vertical plane where the lifting plate 21 is located in the initial state is separated from the opening end of the inner circulation conveyor belt 2 by a certain distance. This distance ensures the distance required for the bracket 3 to rotate along with the inner circulation conveyor belt 2. When the leather piece 13 receives the circuit board, at this time the lifting plate 21 is located below the leather piece 13. At this time, the vertical positions of the leather piece 13 and the lifting plate 21 need to be adjusted until after the leather piece 13 descends, its lowest end is at the same plane as the lifting plate 21 or higher than the plane where the lifting plate 21 is located. At this time, after the electromagnet 17 is powered off, the control frame 16 at the corresponding end of the leather piece 13 also slides down within the bottom cylinder 14 along with the sliding rod 15. The position of the other sliding rod 15 remains unchanged, then the end of the leather piece 13 close to the lifting plate 21 descends, and the circuit board slides down onto the lifting plate 21 under the action of its own weight. Subsequently, the lifting plate 21 needs to convey the turned-over circuit board to the bracket 3.

[0026] The reset member includes an airbag 18, which is arranged at the bottom of the bottom tube 14. The air supply component of the airbag 18 is arranged on the lifting frame 12. The airbag 18 is used to push the sliding rod 15 upward in the bottom tube 14. In this embodiment, the air supply device is arranged on the lifting frame 12 and is connected to the air inlet of the airbag 18. The airbag 18 is arranged in the space at the bottom end of the sliding rod 15 in the bottom tube 14. The function of the airbag 18 can also buffer the falling process of the sliding rod 15. When the sliding rod 15 squeezes the airbag 18 to the limit, one end of the leather piece 13 also drops to the specified position. When the sliding rod 15 needs to be reset, the airbag 18 can be inflated at this time. After the sliding rod 15 rises to the specified position, of course, in this embodiment, an infrared transmitter can also be arranged in the bottom tube 14, and an infrared receiver can be arranged on the side wall of the sliding rod 15. Therefore, when the infrared receiver receives the signal of the infrared transmitter, the infrared receiver controls the electromagnet 17 to be energized and adsorbs the sliding rod 15. At this time, the leather piece 13 is in a horizontal state. Of course, the reset member can also be set as an electric push rod, which is set at the bottom of the bottom tube 14, and the output end of the electric push rod is in contact with the bottom end of the slide bar 15. The function of the electric push rod is mainly to achieve the reset effect of the slide bar.

[0027] The movement direction of the lifting plate 21 on the lifting frame 20 is along the conveying direction of the inner circulation conveyor chain 2. The movement of the lifting plate 21 on the lifting frame 20 is realized by the electric push rod, and the lifting plate 21 is in an L shape. The vertical section of the lifting plate 21 is connected through the output end of the electric push rod, and the horizontal section of the lifting plate 21 is located outside the lifting frame 20, that is, one end of the lifting plate 21 is located outside the lifting frame 20, and when the lifting plate 21 and the lifting frame 20 rise to the same plane as the bracket 3, the lifting plate 21 can be pushed toward the bracket 3 to facilitate the circuit board. For loading, the pushing group includes a pushing belt 23 which is transmission-mounted on the lifting plate 21. The pushing belt 23 is lifted to the same level as the plane where the bracket 3 is located. Similarly, the conveying of the pushing belt 23 is also driven by two pushing rollers and a pushing motor, thereby realizing the driving effect of the pushing belt 23. When the lifting plate 21 drives the pushing belt 23 to move toward the bracket 3, until the pushing belt 23 is close to the bracket 3, the pushing belt 23 is turned on to convey the circuit board on the pushing belt 23 to the position of the bracket 3, and the lifting plate 21 and the lifting frame 20 return to the initial position.

[0028] The implementation principle of a PCB circuit board detection device according to an embodiment of the present application is as follows: After one side of the circuit board is detected and 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 itself stacked on the support 3. Therefore, the hanging cloth 7 can follow the support frame 5 and be pulled above the circuit board. Until the support frame 5 is flipped 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 surface of the inner circulation conveyor belt 2. After the circuit board starts to be turned over and the hanging cloth 7 supports the circuit board, the effect of turning over the circuit board can be realized; through the cooperation of two winding rollers 9, the winding roller 9 located on the support frame 5 starts to wind the hanging cloth 7, and the winding roller 9 located on the support 3 releases the blanking cloth 8, so that the hanging cloth 7 can be wound, and the blanking cloth 8 is pulled outwards until the blanking 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 blanking 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.

[0029] When the leather piece 13 receives the circuit board, at this time, the lifting plate 21 is located below the leather piece 13. At this time, the vertical positions of the leather piece 13 and the lifting plate 21 need to be adjusted until after the leather piece 13 descends, its lowest end is in the same plane as the lifting plate 21 or higher than the plane where the lifting plate 21 is located. At this time, after the electromagnet 17 is powered off, the control frame 16 at the corresponding end of the leather piece 13 also slides down in the bottom cylinder 14 along with the sliding rod 15. The position of the other sliding rod 15 remains unchanged, so the end of the leather piece 13 close to the lifting plate 21 descends, and the circuit board slides down onto the lifting plate 21 under the action of its own weight. Subsequently, the lifting plate 21 needs to convey the turned-over circuit board to the support 3; when the lifting plate 21 and the lifting frame 20 rise to the same plane as the plane of the support 3, at this time, the lifting plate 21 can be pushed towards the support 3 until the pushing belt 23 is close to the support 3. Turning on the pushing belt 23 can convey the circuit board on the pushing belt 23 to the position of the support 3, and the lifting plate 21 and the lifting frame 20 return to the initial position.

[0030] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A PCB circuit board detection device, characterized in that: It comprises a frame (1), a conveying mechanism for conveying a circuit board, a camera mechanism (4) for taking an image of the circuit board for detection, and a turning mechanism for turning over the circuit board; The conveying mechanism comprises an inner-circulation conveying chain belt (2) and a power component for controlling the movement of the inner-circulation conveying chain belt (2); The flipping mechanism comprises a plurality of brackets (3) arranged on the inner circulation conveyor chain 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 chain belt (2); The circuit board on the support (3) follows the inner circulation conveyor chain belt (2) and rotates to the bottom thereof, whereupon the circuit board completes its flipping.

2. A PCB circuit board detection device according to claim 1, characterized in that: The support assembly comprises a support frame (5) rotatably arranged 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 arranged in a concave shape, and the two sides of the opening of the support frame (5) are respectively rotatably connected to the two opposite side walls of the bracket (3), and the axis direction of the rotation of the support frame (5) and the bracket (3) is along a conveying direction perpendicular to the inner circulation conveyor chain belt (2); The hanging portion comprises a plurality of hanging cloths (7), a plurality of blanking cloths (8) and a winding group for winding the hanging cloths (7) and the blanking cloths (8); the hanging cloths (7) and the blanking cloths (8) are arranged at intervals; the blanking cloths (8) are provided with a blanking opening (10) for the circuit board to fall; the hanging cloths (7) are used to support the circuit board; after the support frame (5) rotates 180°, the hanging cloths (7) are located above the circuit board; the area of ​​the hanging cloths (7) is larger than the area of ​​the circuit board; the area of ​​the blanking cloths (8) is the same as that of the hanging cloths (7); and the size of the blanking opening (10) of the blanking cloth (8) is also larger than the end face size of the circuit board.

3. A PCB circuit board detection device according to claim 2, characterized in that: The winding group comprises two winding motors (24) and two winding rollers (9), one of the winding rollers (9) being rotatably arranged at a lateral position of the support frame (5), and the other winding roller (9) being rotatably arranged on the bracket (3). In an 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).

4. A PCB circuit board detection device according to claim 1, characterized in that: The conveying assembly comprises a conveying frame (11) slidably arranged on a frame (1), a lifting frame (12) lifted and lowered on the conveying frame (11), a leather sheet (13) movably arranged on the lifting frame (12), a control unit for controlling the inclination of the leather sheet (13), and a lifting unit for conveying the turned-over circuit board to the bracket (3); the leather sheet (13) is in a horizontal state in an initial state.

5. A PCB circuit board detection device according to claim 4, characterized in that: The control unit comprises a plurality of bottom tubes (14), a slide bar (15) slidably arranged in the bottom tube (14), a control frame (16), an electromagnet (17) for connecting the bottom tube (14) and the slide bar (15), and a reset member for resetting the slide bar (15); the slide bar (15) is slidably arranged in the bottom tube (14); the control frame (16) is fixed on the top of the slide bar (15); the control frame (16) is connected to the bottom of the leather sheet (13); the plurality of bottom tubes (14) are distributed at equal intervals along the length direction of the leather sheet (13); an inner wall of the bottom tube (14) is provided with a mounting hole (19); the electromagnet (17) is fixed in the mounting hole (19) and adsorbs the peripheral wall of the slide bar (15).

6. A PCB circuit board detection device according to claim 5, characterized in that: The lifting part comprises a lifting frame (20) which is lifted and lowered on the frame (1), a lifting plate (21) which is slidably arranged on the lifting frame (20), a lifting electric push rod (22) for lifting the lifting frame (20), and a pushing group for conveying the circuit board on the lifting plate (21) to the inner circulation conveyor chain belt (2), and one end of the leather sheet (13) is lowered to above the lifting plate (21).

7. A PCB circuit board detection device according to claim 5, characterized in that: The control frame (16) is also arranged in a concave 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.

8. A PCB circuit board detection device according to claim 6, characterized in that: The pushing group comprises a pushing belt (23) which is transmission-arranged on the lifting plate (21), and the pushing belt (23) is lifted to be at the same level as the plane where the bracket (3) is located.

Images