A circuit fault detection device and detection method thereof

Abstract

The present invention relates to the technical field of circuit board detection, and specifically to a circuit fault detection device and a detection method thereof, comprising a workbench, wherein the upper surface of the workbench is fixedly connected with a fixed cylinder, the upper surface of the fixed cylinder is rotatably provided with a rotating cylinder, the bottom surface of the fixed cylinder is installed with a motor, the output end of the motor is fixedly connected with a driving shaft, the other end of the driving shaft is fixedly connected with the rotating cylinder, the outer surface of the rotating cylinder is fixedly connected with four arc-shaped connecting blocks distributed in a circular array, the other side of the arc-shaped connecting block is fixedly connected with a U-shaped placement frame, and when batch detection of circuit boards is performed, the present invention can load the next circuit board to be detected while detecting the circuit board, perform sorting operations on the detected circuit boards, and automatically remove pins on faulty circuit boards, thereby greatly improving the degree of automation and continuity in the circuit board detection process, thereby effectively improving the detection efficiency of circuit boards.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board detection, and in particular to a circuit fault detection device and a detection method thereof. Background Art

[0002] When using circuits, short circuits, open circuits and other situations where they cannot work properly often occur. In order to troubleshoot the fault in the circuit, it is necessary to perform electrical performance testing on the circuit board that may have a fault. A common testing method is to remove the circuit board and test it through the metal pins at both ends.

[0003] A circuit board fault detection device with publication number CN218297391U includes a base, a column and a detector, wherein the base is fixedly provided with a column, and the column is connected to the detector through an adjustment component, and the base is staggered with slide grooves A and slide grooves B, and double-headed screws A and double-headed screws B are rotatably provided in the slide grooves A and slide grooves B respectively, and two groups of sliders A and sliders B are slidably provided in the slide grooves A and slide grooves B respectively, and clamping plates are fixedly connected to the sliders A and sliders B, and the other ends of the springs are fixedly connected to baffles.

[0004] The above-mentioned device improves the accuracy of circuit board fault detection by clamping and fixing the circuit board. However, when the above-mentioned device detects the circuit board, the circuit board needs to be fixed first, and then the detection is performed. After the detection is completed, the circuit board is removed and placed in a specified position. Then, the component pins on the faulty circuit board (such as diodes and their pins) are removed to complete the detection of a circuit board. The above steps are repeated to achieve batch detection of circuit boards. It can be seen from the above steps that the above-mentioned device has a low degree of automation and consistency when performing batch detection of circuit boards, which leads to a low overall detection efficiency of the circuit boards.

[0005] Therefore, the present invention provides a circuit fault detection device to solve the above problems. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a circuit fault detection device and a detection method thereof to solve the above-mentioned problem.

[0007] Based on the above objectives, the present invention provides a circuit fault detection device and a detection method thereof:

[0008] Among them, a circuit fault detection device comprises a workbench, the upper surface of the workbench is fixedly connected with a fixed cylinder, the upper surface of the fixed cylinder is rotatably provided with a rotating cylinder, the bottom surface of the fixed cylinder is installed with a motor, the output end of the motor is fixedly connected with a driving shaft, the other end of the driving shaft is fixedly connected with the rotating cylinder, the outer surface of the rotating cylinder is fixedly connected with four arc-shaped connecting blocks distributed in a circular array, the other surface of the arc-shaped connecting block is fixedly connected with a U-shaped placement frame, each of the U-shaped placement frames is provided with a clamping mechanism for fixing the circuit board, the bottom of each U-shaped placement frame is slidably provided with a first baffle and a second baffle, the interior of the rotating cylinder is provided with a slot for the first baffle and the second baffle to slide horizontally, and the interior of the rotating cylinder is provided with a driving mechanism for controlling the opening and closing of the first baffle and the second baffle;

[0009] A circuit table is installed at the edge of the upper surface of the workbench, and the circuit table is opposite to the U-shaped placement frame moved to the right. A stitch removal mechanism is provided on the upper surface of the workbench, and the stitch removal mechanism is opposite to the U-shaped placement frame moved to the front. Collection mechanisms are fixedly installed on the front and left sides of the fixed cylinder.

[0010] Preferably, the clamping mechanism includes a clamping plate slidably connected to the inside of the U-shaped placing frame, and the sides of the clamping plate and the U-shaped placing frame close to each other are fixedly provided with a boss for supporting the circuit board, and a first electric push rod is installed on the outer surface of the clamping plate, and the telescopic end of the first electric push rod is fixedly connected to the clamping plate.

[0011] Preferably, the driving mechanism includes a second tooth plate fixedly connected to the bottom surface of the second baffle, the bottom surface of the first baffle is fixedly connected to a connecting plate, the outer surface of the connecting plate is fixedly connected to a first tooth plate flush with the second tooth plate, a rotating shaft is rotatably installed inside the rotating cylinder, the outer surface of the rotating shaft is fixedly connected to a second gear, the second gear is located between the first tooth plate and the second tooth plate and is meshed with the first tooth plate and the second tooth plate.

[0012] Preferably, a disc is slidably connected to the inside of the rotating cylinder, and the disc is connected to the inner top wall of the rotating cylinder by a spring, a guide rod is fixedly connected to the inner top wall of the rotating cylinder, the other end of the guide rod passes through the disc and is fixedly connected to a circular plate, and the circular plate is in contact with the bottom surface of the disc, a third tooth plate is fixedly connected to the upper surface of the disc, a first gear is fixedly connected to the outer surface of the rotating shaft, and the first gear is meshed with the third tooth plate.

[0013] Preferably, a second electric push rod is installed on the upper surface of the workbench, and the telescopic end of the second electric push rod is in contact with the disc.

[0014] Preferably, the pin removal mechanism includes a support frame fixedly connected to the upper surface of the workbench, the outer surface of the support frame is fixedly connected to a mounting block, the outer surface of the mounting block is mounted with a third electric push rod, the telescopic end of the third electric push rod is mounted with a first mounting plate, and two welding pens are mounted on a side of the first mounting plate away from the third electric push rod.

[0015] Preferably, a fourth electric push rod is installed on the upper surface of the support frame, a second mounting plate is installed at the telescopic end of the fourth electric push rod, and two ejectors are installed on a side of the second mounting plate away from the fourth electric push rod.

[0016] Preferably, the collecting mechanism comprises a collecting shell fixedly connected to the outer surface of the workbench, and the upper surface of the collecting shell is fixedly connected to a guide plate inclined toward the direction of the workbench.

[0017] Preferably, two support blocks are fixedly connected to the upper surface of the workbench, and the support blocks are used to place the detection pen on the circuit table.

[0018] The present invention also provides a circuit fault detection method, which uses the above circuit fault detection device to perform circuit fault detection, comprising the following steps:

[0019] S1. Placing the circuit board: A manipulator is provided at the back of the workbench, and the manipulator places the circuit board to be inspected inside the U-shaped placement frame at the back, and then starts the first electric push rod to clamp and fix the U-shaped placement frame;

[0020] S2, circuit board detection: when the circuit board is moved to the right, the robot on the back continues to load the material and at the same time operates the circuit fault detection circuit board for detection;

[0021] S3, circuit board sorting: when the circuit board after inspection moves to the front, if the circuit board is faulty, the pins on the circuit board are removed by the pin removal mechanism, and then the circuit board is taken off the U-shaped placement frame. If the circuit board is not faulty, the circuit board is continued to be driven to move to the left, and the circuit board is taken off the U-shaped placement frame. At the same time, the circuit board continues to be loaded and inspected.

[0022] Beneficial effects of the present invention:

[0023] 1. When batch testing of circuit boards is performed, the present invention can load the next circuit board to be tested while testing the circuit board, sort the tested circuit boards, and automatically remove the pins on the faulty circuit boards, thereby greatly improving the degree of automation and continuity in the circuit board testing process, and effectively improving the testing efficiency of the circuit boards.

[0024] 2. The present invention can support and limit the circuit board inside the U-shaped placement frame by providing a clamping mechanism, thereby improving the stability of the circuit board during the detection process. By providing a driving mechanism, the first baffle plate and the second baffle plate under the U-shaped placement frame can be automatically opened, so that the U-shaped placement frame after detection can automatically fall into the inside of the collection shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a left side view of the present invention;

[0028] Figure 3 is a cross-sectional view of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the rotating drum and the driving mechanism of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the U-shaped placement frame, the first baffle plate, and the second baffle plate of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the disc and the second electric push rod of the present invention.

[0032] The markings in the figure are:

[0033] 1. Workbench; 2. Fixed cylinder; 3. Rotating cylinder; 4. Motor; 5. Driving shaft; 6. Circuit table; 7. Arc-shaped connecting block; 8. U-shaped placing frame; 9. Clamp; 10. First electric push rod; 11. First baffle; 12. Second baffle; 13. Connecting plate; 14. First tooth plate; 15. Second tooth plate; 16. Rotating shaft; 17. First gear; 18. Second gear; 19. Disc; 20. Second electric push rod; 21. Guide rod; 22. Round plate; 23. Spring; 24. Third tooth plate; 25. Support frame; 26. Third electric push rod; 27. First mounting plate; 28. Soldering pen; 29. ​​Fourth electric push rod; 30. Second mounting plate; 31. Ejector; 32. Collecting shell; 33. Guide plate; 34. Mounting block; 35. Support block. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0035] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] like Figure 1-Figure 6 As shown, a circuit fault detection device includes a workbench 1, a fixed cylinder 2 is fixedly connected to the upper surface of the workbench 1, a rotating cylinder 3 is rotatably arranged on the upper surface of the fixed cylinder 2, a motor 4 is installed on the bottom surface of the fixed cylinder 2, a driving shaft 5 is fixedly connected to the output end of the motor 4, the other end of the driving shaft 5 is fixedly connected to the rotating cylinder 3, four arc-shaped connecting blocks 7 distributed in a circular array are fixedly connected to the outer surface of the rotating cylinder 3, and a U-shaped placement frame 8 is fixedly connected to the other side of the arc-shaped connecting block 7. When the motor 4 is started, the motor 4 can drive the driving shaft 5 and the rotating cylinder 3, and the rotation of the rotating cylinder 3 can drive the arc-shaped connecting block 7 and the U-shaped placement frame 8 to rotate accordingly. The motor 4 can be controlled by a program so that the motor 4 can only rotate forward ninety degrees at a single start.

[0037] Each U-shaped placement frame 8 is provided with a clamping mechanism for fixing the circuit board, and the clamping mechanism includes a clamping plate 9 slidably connected to the inside of the U-shaped placement frame 8, and the sides of the clamping plate 9 and the U-shaped placement frame 8 that are close to each other are fixedly provided with bosses for supporting the circuit board, and the outer surface of the clamping plate 9 is installed with a first electric push rod 10, and the telescopic end of the first electric push rod 10 is fixedly connected to the clamping plate 9. After the manipulator places the circuit board to be inspected inside the U-shaped placement frame 8, the two bosses can provide preliminary support for the circuit board, and then the first electric push rod 10 is started, and the first electric push rod 10 can drive the clamping plate 9 to clamp and fix the circuit board.

[0038] A first baffle 11 and a second baffle 12 are slidably arranged at the bottom of each U-shaped placement frame 8, and a groove for horizontal sliding of the first baffle 11 and the second baffle 12 is opened inside the rotating cylinder 3. The first baffle 11 and the second baffle 12 can prevent the circuit board from falling from the U-shaped placement frame 8 during the inspection process.

[0039] The interior of the rotating cylinder 3 is provided with a driving mechanism for controlling the opening and closing of the first baffle 11 and the second baffle 12, the driving mechanism includes a second tooth plate 15 fixedly connected to the bottom surface of the second baffle 12, the bottom surface of the first baffle 11 is fixedly connected to a connecting plate 13, the outer surface of the connecting plate 13 is fixedly connected to a first tooth plate 14 flush with the second tooth plate 15, the interior of the rotating cylinder 3 is rotatably installed with a rotating shaft 16, the outer surface of the rotating shaft 16 is fixedly connected to a second gear 18, the second gear 18 is located between the first tooth plate 14 and the second tooth plate 15 and is aligned with the first tooth plate 1 4 is meshed with the second tooth plate 15. When the second gear 18 is driven to rotate forward, the second tooth plate 15 and the first tooth plate 14 can be driven to move horizontally in a direction away from each other. The movement of the second tooth plate 15 can drive the second baffle 12 to move accordingly. The movement of the first tooth plate 14 can drive the connecting plate 13 and the first baffle 11 to move accordingly, so that the first baffle 11 and the second baffle 12 can be opened when the second gear 18 rotates forward. Similarly, the first baffle 11 and the second baffle 12 can be closed when the second gear 18 rotates reversely.

[0040] A disc 19 is slidably connected to the inside of the rotating cylinder 3, and the disc 19 is connected to the inner top wall of the rotating cylinder 3 by a spring 23. A guide rod 21 is fixedly connected to the inner top wall of the rotating cylinder 3. The other end of the guide rod 21 penetrates the disc 19 and is fixedly connected to a circular plate 22, and the circular plate 22 contacts the bottom surface of the disc 19. A third tooth plate 24 is fixedly connected to the upper surface of the disc 19. A first gear 17 is fixedly connected to the outer surface of the rotating shaft 16, and the first gear 17 is meshed with the third tooth plate 24. A through hole adapted to the guide rod 21 is provided inside the disc 19. Through the cooperation between the guide rod 21, the circular plate 22 and the spring 23, not only can the disc 19 be supported, but also when the disc 19 loses driving force, the disc 19 can be quickly moved downward to reset.

[0041] A second electric push rod 20 is installed on the upper surface of the workbench 1, and the telescopic end of the second electric push rod 20 is in contact with the disc 19. When the second electric push rod 20 is controlled to extend, the disc 19 and the third tooth plate 24 can be moved upward. The upward movement of the third tooth plate 24 can drive the first gear 17, the rotating shaft 16 and the second gear 18 to rotate forward, thereby opening the first baffle 11 and the second baffle 12. When the second electric push rod 20 is controlled to shorten, under the action of gravity and elastic force, the first electric push rod 10 and the third tooth plate 24 will move downward. The downward movement of the third tooth plate 24 can drive the first gear 17, the rotating shaft 16 and the second gear 18 to rotate in the opposite direction, thereby closing the first baffle 11 and the second baffle 12.

[0042] A circuit table 6 is installed at the edge of the upper surface of the workbench 1. The circuit table 6 is opposite to the U-shaped placement frame 8 moved to the right. Two support blocks 35 are fixedly connected to the upper surface of the workbench 1. The support blocks 35 are used to place the detection pen on the circuit table 6. The circuit table 6 is used to detect the circuit board inside the U-shaped placement frame 8 on the right.

[0043] The stitch removal mechanism includes a support frame 25 fixedly connected to the upper surface of the workbench 1, the outer surface of the support frame 25 is fixedly connected to a mounting block 34, the outer surface of the mounting block 34 is mounted with a third electric push rod 26, the telescopic end of the third electric push rod 26 is mounted with a first mounting plate 27, and two welding pens 28 are mounted on a side of the first mounting plate 27 away from the third electric push rod 26. When the third electric push rod 26 and the welding pens 28 are started, the third electric push rod 26 can drive the welding pens 28 to move to the stitch, and the welding pens 28 can melt the solder joints at the stitches, and then the welding pens 28 are turned off, and the third electric push rod 26 drives the welding pens 28 to reset.

[0044] A fourth electric push rod 29 is installed on the upper surface of the support frame 25, and a second mounting plate 30 is installed at the telescopic end of the fourth electric push rod 29. Two ejector pins 31 are installed on the side of the second mounting plate 30 away from the fourth electric push rod 29. When the fourth electric push rod 29 is started, the fourth electric push rod 29 can drive the ejector pins 31 to push the pins off the circuit board.

[0045] The front and left sides of the fixed cylinder 2 are fixedly installed with a collecting mechanism, which includes a collecting shell 32 fixedly connected to the outer surface of the workbench 1, and the upper surface of the collecting shell 32 is fixedly connected to a guide plate 33 inclined in the direction of the workbench 1. The circuit boards dropped from the U-shaped placement frame 8 will fall onto the guide plate 33, and then slide along the guide plate 33 to the inside of the collecting shell 32. The front collecting mechanism is used to collect faulty circuit boards, the left collecting mechanism is used to collect normal circuit boards, and the front collecting mechanism is used to collect normal circuit boards.

[0046] A circuit fault detection method comprises the following steps:

[0047] S1. Placing the circuit board: A manipulator is provided on the back of the workbench 1, and the manipulator places the circuit board to be tested inside the U-shaped placement frame 8 on the back, and then starts the first electric push rod 10 to clamp and fix the U-shaped placement frame 8;

[0048] S2, circuit board detection: when the circuit board is moved to the right, the robot on the back continues to load the material and at the same time operates the circuit fault detection circuit board for detection;

[0049] S3, circuit board sorting: when the circuit board after inspection moves to the front, if the circuit board is faulty, the pins on the circuit board are removed by the pin removal mechanism, and then the circuit board is taken out of the U-shaped placement frame 8; if the circuit board is not faulty, the circuit board is continued to be driven to move to the left, and the circuit board is taken out of the U-shaped placement frame 8; at the same time, the circuit board is continued to be loaded and inspected.

[0050] Working principle: When testing the circuit board, firstly, the circuit board is placed inside the U-shaped placement frame 8 on the back by the manipulator, and then the circuit board is fixed by the clamping mechanism, and then the motor 4 is started, and the motor 4 can drive the rotating cylinder 3 to rotate forward 90 degrees. The rotation of the rotating cylinder 3 can drive the four U-shaped placement frames 8 to rotate synchronously, and then the U-shaped placement frame 8 on the back of the rotating cylinder 3 will rotate to the right, and then the circuit board inside the right U-shaped placement frame 8 can be tested through the circuit table 6. After the test is completed, the rotating cylinder 3 is continued to be controlled to rotate forward 90 degrees, and the circuit board after the test will rotate to the front. If the circuit board is faulty, the pin removal mechanism is first controlled to remove the two pins on the circuit board, and then the driving mechanism is used to open the first baffle 11 and the second baffle 12, and the fixation of the circuit board is released, and then The circuit board will fall from the U-shaped placement frame 8 to the guide plate 33, and then slide along the guide plate 33 to the inside of the collection shell 32. If there is no fault in the circuit board, the rotating cylinder 3 will continue to be controlled to rotate forward ninety degrees, and then the rotating cylinder 3 will rotate to the left, and then when the first baffle 11 and the second baffle 12 are opened by the driving mechanism, the circuit board will fall to the inside of the left collection shell 32. At the same time, the robot can still place the circuit board to be inspected in the rear U-shaped placement frame 8, the staff can still inspect the circuit board in the right U-shaped placement frame 8, and the pin removal mechanism can still remove the pins of the circuit board in the front U-shaped placement frame 8, thereby greatly improving the degree of automation and continuity in the circuit board detection process, and thus effectively improving the circuit board detection efficiency.

[0051] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A circuit fault detection device, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is fixedly connected to a fixed cylinder (2), the upper surface of the fixed cylinder (2) is rotatably provided with a rotating cylinder (3), the bottom surface of the fixed cylinder (2) is mounted with a motor (4), the output end of the motor (4) is fixedly connected to a drive shaft (5), the other end of the drive shaft (5) is fixedly connected to the rotating cylinder (3), the outer surface of the rotating cylinder (3) is fixedly connected to four arc-shaped connecting blocks (7) distributed in a circular array, the other surface of the arc-shaped connecting block (7) is fixedly connected to a U-shaped placement frame (8), each of the U-shaped placement frames (8) is provided with a clamping mechanism for fixing the circuit board, and the bottom of each of the U-shaped placement frames (8) is fixedly connected to the rotating cylinder (3). A first baffle (11) and a second baffle (12) are both slidably arranged, a slot for the first baffle (11) and the second baffle (12) to slide horizontally is provided inside the rotating cylinder (3), and a driving mechanism for controlling the opening and closing of the first baffle (11) and the second baffle (12) is provided inside the rotating cylinder (3); a circuit table (6) is installed at the edge of the upper surface of the workbench (1), the circuit table (6) is opposite to the U-shaped placement frame (8) moved to the right, a pin removal mechanism is provided on the upper surface of the workbench (1), the pin removal mechanism is opposite to the U-shaped placement frame (8) moved to the front, and a collecting mechanism is fixedly installed on the front and left sides of the fixed cylinder (2); The driving mechanism comprises a second tooth plate (15) fixedly connected to the bottom surface of the second baffle (12); a connecting plate (13) is fixedly connected to the bottom surface of the first baffle (11); a first tooth plate (14) flush with the second tooth plate (15) is fixedly connected to the outer surface of the connecting plate (13); a rotating shaft (16) is rotatably mounted inside the rotating cylinder (3); a second gear (18) is fixedly connected to the outer surface of the rotating shaft (16); the second gear (18) is located between the first tooth plate (14) and the second tooth plate (15) and meshes with the first tooth plate (14) and the second tooth plate (15); A disc (19) is slidably connected to the interior of the rotating cylinder (3), and the disc (19) is connected to the inner top wall of the rotating cylinder (3) via a spring (23). A guide rod (21) is fixedly connected to the inner top wall of the rotating cylinder (3). The other end of the guide rod (21) passes through the disc (19) and is fixedly connected to a circular plate (22), and the circular plate (22) is in contact with the bottom surface of the disc (19). A third toothed plate (24) is fixedly connected to the upper surface of the disc (19). A first gear (17) is fixedly connected to the outer surface of the rotating shaft (16), and the first gear (17) is meshed with the third toothed plate (24).

2. A circuit fault detection device according to claim 1, characterized in that: The clamping mechanism comprises a clamping plate (9) slidably connected to the inside of a U-shaped placement frame (8); a boss for supporting the circuit board is fixedly provided on the mutually adjacent sides of the clamping plate (9) and the U-shaped placement frame (8); a first electric push rod (10) is mounted on the outer surface of the clamping plate (9); and a telescopic end of the first electric push rod (10) is fixedly connected to the clamping plate (9).

3. A circuit fault detection device according to claim 1, characterized in that: A second electric push rod (20) is installed on the upper surface of the workbench (1), and the telescopic end of the second electric push rod (20) is in contact with the disc (19).

4. A circuit fault detection device according to claim 1, characterized in that: The pin removal mechanism comprises a support frame (25) fixedly connected to the upper surface of the workbench (1); a mounting block (34) is fixedly connected to the outer surface of the support frame (25); a third electric push rod (26) is mounted on the outer surface of the mounting block (34); a first mounting plate (27) is mounted on the telescopic end of the third electric push rod (26); and two soldering pens (28) are mounted on a side of the first mounting plate (27) away from the third electric push rod (26).

5. A circuit fault detection device according to claim 4, characterized in that: A fourth electric push rod (29) is mounted on the upper surface of the support frame (25), a second mounting plate (30) is mounted on the telescopic end of the fourth electric push rod (29), and two ejector pins (31) are mounted on a side of the second mounting plate (30) away from the fourth electric push rod (29).

6. A circuit fault detection device according to claim 1, characterized in that: The collecting mechanism comprises a collecting shell (32) fixedly connected to the outer surface of the workbench (1), and a guide plate (33) inclined in the direction of the workbench (1) is fixedly connected to the upper surface of the collecting shell (32).

7. A circuit fault detection device according to claim 1, characterized in that: Two support blocks (35) are fixedly connected to the upper surface of the workbench (1), and the support blocks (35) are used to place the detection pen on the circuit table (6).

8. A circuit fault detection method using the circuit fault detection device according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1, placing a circuit board: a manipulator is arranged at the back of a workbench (1), and the manipulator places the circuit board to be tested inside a U-shaped placement frame (8) at the back, and then starts a first electric push rod (10) to clamp and fix the U-shaped placement frame (8); S2, circuit board detection: when the circuit board is moved to the right, the manipulator at the back continues to load the material, and at the same time operates the circuit fault detection circuit board for detection; S3, circuit board sorting: when the detected circuit board is moved to the front, if the circuit board has a fault, the pins on the circuit board are removed by a pin removal mechanism, and then the circuit board is removed from the U-shaped placement frame (8); if the circuit board has no fault, the circuit board is continued to be driven to move to the left, and the circuit board is removed from the U-shaped placement frame (8), and at the same time, the circuit board continues to be loaded and detected.

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