A circuit board detection device

Abstract

The present invention relates to the technical field of circuit boards and discloses a circuit board detection device, which includes a base. A backboard is connected to the base. The backboard is connected to a detection box through a fixing frame. One side of the detection box is connected to a detector. A side cylinder is fixedly connected to the outside of the detection box. The telescopic end of the side cylinder penetrates through the detection box and is connected to a pushing bar. An L-shaped groove is formed on the backboard. A sliding rod is slidably connected to the L-shaped groove. One end of the sliding rod is connected to a turning arm. One end of the turning arm is connected to a sliding bar. A clamping hand is slidably connected to the sliding bar. A conveying rail is connected to the backboard. A conveyor belt is connected to the conveying rail. The lower end of the conveying rail is connected to a hinge bracket. The present invention uses the clamping hand to clamp the circuit board. Among them, by setting the second arc plate, it plays a role in limiting the movement of the circuit board on the conveyor belt, ensuring that the clamping hand can accurately clamp the circuit board, ensuring the subsequent flipping and detection process of the circuit board, and improving the detection efficiency of the circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit boards, and particularly to a circuit board detection device. Background Art

[0002] Circuit boards miniaturize and visualize circuits, and play an important role in the mass production of fixed circuits and the optimization of the layout of electrical appliances. Circuit boards can be called printed wiring boards or printed circuit boards, and flexible-rigid boards are formed by laminating flexible printed circuit boards and rigid printed circuit boards according to relevant process requirements to form circuit boards with the characteristics of FPC and PCB.

[0003] When manufacturing circuit boards, in order to ensure that the circuits can be used normally, each circuit board needs to be circuit-tested. The initial steps of traditional circuit board detection are to observe whether there are obvious faults such as solder joint detachment, false soldering, and copper body edge warping in the circuit. Finally, the connectivity of each circuit on the circuit board is detected by a test pen. The initial detection of circuit boards is divided into manual detection and mechanical detection. For the manual detection method, since the circuit board is taken by hand and detected visually by humans, the detection accuracy is unstable and the detection efficiency is low, which cannot meet the requirements of mass circuit board detection. However, manual detection can flip the circuit board, that is, it can perform detailed detection on all angles of the circuit board. Mechanical detection is to place the circuit board on a detection conveyor belt, and rely on the conveyor belt to transport the circuit board into the detection device, and rely on a camera to scan the circuit board in a moving state, so as to perform a preliminary detection on the upper surface of each circuit board. This detection method has high detection accuracy, but it cannot detect the back of the circuit board and needs to flip the circuit board again for subsequent detection, resulting in a decrease in detection efficiency. Therefore, there is currently a lack of a circuit board detection device that can perform flip detection during the mechanical detection of circuit boards.

[0004] Based on this, a circuit board detection device is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a circuit board detection device in order to solve the above problems.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A circuit board detection device includes a base, a backboard is connected to the base, a detection box is connected to the backboard through a fixing frame, a detector is connected to one side of the detection box, a side cylinder is fixedly connected to the outside of the detection box, a pushing bar is connected to the telescopic end of the side cylinder and penetrates through the detection box, an L-shaped groove is formed on the backboard, a sliding rod is slidably connected to the L-shaped groove, one end of the sliding rod is connected to a flipping arm, one end of the flipping arm is connected to a sliding strip, and a clamping hand is slidably connected to the sliding strip.

[0008] A conveying rail is connected to the backplane. A conveyor belt is connected to the conveying rail. A hinge frame is connected to the lower end of the conveying rail. An arc plate one and an arc plate two are rotatably connected to the hinge frame. A spring is connected between the arc plate one and the arc plate two. The spring is sleeved on the hinge frame. A sensor is connected to one side of the arc plate two. A notch is formed in the conveying rail. A transfer mechanism is connected to the backplane for driving a clamping arm to clamp a circuit board and transfer it for detection.

[0009] Preferably, a reciprocating cylinder is rotatably connected to the sliding rod. A cylinder frame is connected to the outside of the reciprocating cylinder. The cylinder frame is rotatably connected to one side of the backplane.

[0010] Preferably, a collar is fixedly connected to the telescopic end of the reciprocating cylinder. The collar is sleeved on the sliding rod.

[0011] Preferably, a rotating shaft is connected to the outside of the cylinder frame. A socket is connected to one side of the backplane. One end of the rotating shaft is rotatably connected in the socket.

[0012] Preferably, the transfer mechanism includes a slider. A sleeve block is connected to the slider. The sleeve block is sleeved on the sliding rod. A lifting block is slidably connected to one side of the backplane. The sleeve block is slidably connected to one side of the lifting block. One end of the sliding rod is connected to a connecting strip. The other end of the connecting strip is connected to a guiding column. A guiding strip, a button one and a button two are connected to the backplane. One end of the lifting block is connected to a pressing block.

[0013] Preferably, two sliding rails one are fixedly connected to one side of the backplane. The lifting block is slidably connected to the sliding rails one.

[0014] Preferably, a sliding rail two is fixedly connected to one side of the lifting block. The sleeve block is slidably connected to the sliding rail two.

[0015] Preferably, a limiting frame is connected to one side of the backplane. The limiting frame is arranged outside the L-shaped groove.

[0016] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0017] 1. By adopting a clamping hand structure in this application, the circuit board is clamped by the clamping hand. Among them, the arc plate two is arranged to limit the movement of the circuit board on the conveyor belt, ensuring that the clamping hand can accurately clamp the circuit board, ensuring the subsequent flipping and detection process of the circuit board. And by setting a side cylinder, the pushing strip is used to push the connection position of the circuit board and the clamping hand, so that the circuit board moves in the detection box, ensuring that the detector can scan the back of the circuit board at various angles, avoiding the problem of scanning dead angles, and improving the detection accuracy of the circuit board.

[0018] 2. By adopting the limit frame structure, the present application uses the limit frame to limit the connection bar structure, ensuring that the structure will not swing due to flipping when the flipping wall rises and falls, improving the stability of the gripper for clamping the circuit board, and at the same time improving the stability of the structure when the circuit board is clamped and lifted. By setting the guiding bar and the guiding column to cooperate with each other, the effect of accurately controlling the deflection direction of the flipping arm is achieved, ensuring that the circuit board can be stably fed into the detection box for detection. Description of the Drawings

[0019] Figure 1 Shows a schematic structural diagram of the overall detection device provided by an embodiment of the present invention;

[0020] Figure 2 Shows a schematic structural diagram of the connection part of the limit frame provided by an embodiment of the present invention;

[0021] Figure 3 Shows an exploded structural diagram of the connection part of the sliding rod provided by an embodiment of the present invention;

[0022] Figure 4 Shows a schematic structural diagram of the connection part of the hinge frame provided by an embodiment of the present invention;

[0023] Figure 5 Shows a schematic side view structural diagram of the detection device provided by an embodiment of the present invention.

[0024] Legend Explanation:

[0025] 1. Base; 2. Back panel; 3. Fixed frame; 4. Detection box; 5. Side cylinder; 6. Detector; 7. L-shaped groove; 8. First slide rail; 9. Lifting block; 10. Second slide rail; 11. Slide block; 12. Flipping arm; 13. Slide bar; 14. Conveyor rail; 15. Sleeve seat; 16. Reciprocating cylinder; 17. Cylinder frame; 18. First button; 19. Connection bar; 20. Guiding column; 21. Guiding bar; 22. Limit frame; 23. Pushing bar; 24. Sleeve ring; 25. Rotating shaft; 26. Sliding rod; 27. Sleeve block; 28. Gripper; 29. Hinge frame; 30. Pressing block; 31. First arc plate; 32. Second arc plate; 33. Spring; 34. Conveyor belt; 35. Notch; 36. Second button; 37. Sensor. Detailed Embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0027] Please refer toFigures 1-5 , the present invention provides a technical solution:

[0028] A circuit board detection device includes a base 1, a backplane 2 is connected to the base 1, the backplane 2 is vertically and fixedly connected to the base 1, the backplane 2 is connected to a detection box 4 through a fixing frame 3, the detection box 4 adopts a box structure, mainly to improve the detection accuracy and avoid being interfered by the external environment. One side of the detection box 4 is connected to a detector 6, and the specific structure of the detector 6 is a relatively mature technology in the prior art and will not be elaborated here. A side cylinder 5 is fixedly connected to the outside of the detection box 4. The side cylinder 5 is a short-stroke cylinder. When the side cylinder 5 extends and pushes the circuit board to move to the maximum distance, the circuit board will not collide with the inner side of the detection box 4. The telescopic end of the side cylinder 5 penetrates through the detection box 4 and is connected to a push bar 23. An L-shaped groove 7 is opened on the backplane 2, and a sliding rod 26 is slidably connected to the L-shaped groove 7. One end of the sliding rod 26 is connected to a turning arm 12, and the sliding rod 26 and the turning arm 12 are perpendicular to each other. One end of the turning arm 12 is connected to a slide bar 13, and a clamp 28 is slidably connected to the slide bar 13. Controlling the clamp 28 to move on the slide bar 13 is a prior art;

[0029] A conveying rail 14 is connected to the backplane 2, and a conveyor belt 34 is connected to the conveying rail 14. The conveying rail 14 provided on one side of the backplane 2 is in two strip-shaped structures, while the conveying rail 14 provided on the other side of the backplane 2 is in a connected state. Being set in a connected state is mainly to improve the transportation stability, and the circuit board transported here has been completed with detection. The two strip-shaped conveying rails 14 are mainly to avoid interfering with the positioning of the circuit board. The lower end of the conveying rail 14 is connected to a hinge frame 29, and an arc plate one 31 and an arc plate two 32 are rotatably connected to the hinge frame 29. A spring 33 is connected between the arc plate one 31 and the arc plate two 32, and the spring 33 is sleeved on the hinge frame 29. One side of the arc plate two 32 is connected to a sensor 37. The sensor 37 is arranged on the side facing the arc plate one 31, and the sensor 37 is a pressure sensor 37. When the circuit board is transported to press the sensor 37, the sensor 37 emits a signal to control the clamp 28 to clamp the circuit board. A notch 35 is opened on the conveying rail 14, and a transfer mechanism for driving the circuit board clamped on the turning arm 12 to be transferred for detection is connected to the backplane 2.

[0030] Specifically, as Figure 1 shown, a reciprocating cylinder 16 is rotatably connected to the sliding rod 26. The reciprocating cylinder 16 can drive the sliding rod 26 to slide on the L-shaped groove 7. The transmission method is simple and stable, which is convenient for later maintenance. The outside of the reciprocating cylinder 16 is connected to a cylinder frame 17, and the cylinder frame 17 is rotatably connected to one side of the backplane 2.

[0031] Specifically, as Figure 3As shown, a collar 24 is fixedly connected to the telescopic end of the reciprocating cylinder 16. The collar 24 is sleeved on the sliding rod 26. By setting the structure of the collar 24, the stability of the transmission of the collar 24 is improved. When the reciprocating cylinder 16 expands and contracts, relative rotation will occur between the collar 24 and the sliding rod 26.

[0032] Specifically, as Figure 3 shown, a rotating shaft 25 is connected to the outside of the cylinder frame 17, and a socket 15 is connected to one side of the back plate 2. One end of the rotating shaft 25 is rotatably connected in the socket 15. When the reciprocating cylinder 16 expands and contracts, one end of the rotating shaft 25 will rotate in the socket 15. A limiting structure is provided at one end of the rotating shaft 25, so that only relative rotation can occur between the rotating shaft 25 and the socket 15, and the structures cannot be separated, improving the transmission stability of the reciprocating cylinder 16.

[0033] Specifically, as Figure 2 and Figure 3 shown, the transfer mechanism includes a slider 11. A sleeve block 27 is connected to the slider 11. The sleeve block 27 is sleeved on the sliding rod 26. The sliding rod 26 drives the sleeve block 27 to move, thereby driving the turning arm 12 to move. A lifting block 9 is slidably connected to one side of the back plate 2. The sleeve block 27 is slidably connected to one side of the lifting block 9. One end of the sliding rod 26 is connected to a connecting bar 19, and the other end of the connecting bar 19 is connected to a guide post 20. A guide bar 21, a button one 18 and a button two 36 are connected to the back plate 2. The guide bar 21 and the connecting bar 19 are not in the same vertical plane. One end of the lifting block 9 is connected to a pressing block 30. The pressing block 30 is arranged directly above the button two 36. The button two 36 has the effect of controlling the operation of the conveyor belt 34. The button one 18 is arranged at one end of the horizontal section of the L-shaped groove 7 and can be pressed by the structure of the sliding rod 26. The button one 18 has the effect of controlling the operation of the side cylinder 5.

[0034] Specifically, as Figure 1 and Figure 3 shown, two slide rails one 8 are fixedly connected to one side of the back plate 2. The lifting block 9 is slidably connected to the slide rails one 8. A groove matching the slide rails one 8 is provided on one side of the lifting block 9 to ensure the stability of the structure when the lifting block 9 slides along the slide rails one 8.

[0035] Specifically, as Figure 3 shown, a slide rail two 10 is fixedly connected to one side of the lifting block 9. The sleeve block 27 is slidably connected to the slide rail two 10. A groove matching the slide rail two 10 is provided on one side of the sleeve block 27, thereby improving the stability of the sleeve block 27 sliding along the slide rail two 10.

[0036] Specifically, as Figure 2As shown in the figure, a limiting frame 22 is connected to one side of the backplane 2. The limiting frame 22 is arranged outside the L-shaped groove 7. By setting the limiting frame 22, the stability of the up-and-down movement of the connecting strip 19 is improved, the structure is prevented from swinging, and the limiting effect on the connecting strip 19 is achieved.

[0037] In summary, for a circuit board detection device provided in this embodiment, the circuit board to be detected needs to be placed on the conveying rail 14, and the conveyor belt 34 arranged thereon is relied on to complete the transportation of the circuit board. The conveyor belt 34 contacts both sides of the circuit board. This transportation method enables the middle position of the lower surface of the circuit board not to contact the conveyor belt 34. When the circuit board moves on the conveying rail 14, it will pass through the upper surface detection device to perform a preliminary appearance detection on the upper surface of the circuit board. Subsequently, it is transported to this detection device through the conveying rail 14 to realize the detection of the lower surface of the circuit board, enabling the upper and lower surface detections of the circuit board to be carried out sequentially, improving the detection accuracy and ensuring the detection efficiency at the same time;

[0038] When the reciprocating cylinder 16 contracts to the maximum distance, at this time the height of the lifting block 9 is the lowest. At this time, the pressing block 30 connected to one side of the lifting block 9 can press the button two 36. Among them, the button two 36 has the effect of controlling the operation of the conveyor belt 34 on the conveying rail 14. When the structure of the button two 36 is pressed, the conveyor belt 34 structure can drive the circuit board thereon to move, and when the button two 36 is not pressed, at this time the conveyor belt 34 stops operating. When the lifting block 9 is at the lowest point, the clamp 28 slidably connected to the lower end of the slide bar 13 drops to the lowest point. At this time, the clamp 28 structure can press the arc plate one 31, causing the arc plate two 32 connected to the arc plate one 31 through the spring 33 to deflect synchronously, so that one end of the arc plate two 32 is lifted. The notch 35 structure opened on the conveying rail 14 is mainly to avoid interfering with the slide bar 13 and the clamp 28, so that when the clamps 28 approach each other, the circuit board arranged on the conveyor belt 34 can be clamped;

[0039] Among them, the length of the arc plate two 32 is longer than that of the arc plate one 31. Therefore, the mass of the arc plate one 31 is lighter than that of the arc plate two 32. In the natural state, one end of the arc plate one 31 is in a lifted state;

[0040] Since the conveyor belt 34 is in an operating state and one end of the arc plate two 32 is lifted, at this time one side of the arc plate two 32 can just limit the circuit board. That is, when the circuit board moves with the conveyor belt 34 to contact one side of the arc plate two 32, at this time the circuit board stops moving. Since one side of the circuit board contacts the sensor 37 arranged on one side of the arc plate two 32, the sensor 37 here is a pressure sensor 37. When the sensor 37 senses a pressure change, it can send a signal to the slide bar 13. At this time, the slide bar 13 can control the clamps 28 to approach each other to clamp the circuit board that stops moving with the conveyor belt 34. At this time, the conveyor belt 34 is still in an operating state;

[0041] When the clamping hand 28 finishes clamping the circuit board and starts the flipping detection operation of the circuit board, the reciprocating cylinder 16 starts to extend. The collar 24 connected to the telescopic end of the reciprocating cylinder 16 is used to push the sliding rod 26 to move. Since the sliding rod 26 is limited by the L-shaped structure of the L-shaped groove 7, that is, the sliding rod 26 can only slide along the L-shaped groove 7;

[0042] In the initial stage, the sliding rod 26 is in the vertical rising stage. At this time, the lifting block 9 moves upward along the first slide rail 8, and the slider 11 does not slide along the second slide rail 10. Since the height of the lifting block 9 rises, the pressing block 30 no longer presses the second button 36, the conveyor belt 34 stops running, and the clamping hand 28 no longer presses the first arc plate 31 structure. Therefore, one end of the second arc plate 32 no longer tilts up. The time when the clamping hand 28 no longer presses the first arc plate 31 structure is not the time when the reciprocating cylinder 16 extends, but when the sensor 37 sends a signal to the slide bar 13, causing the clamping hands 28 to approach each other. At this time, the clamping hands 28 begin to move horizontally away from one end of the first arc plate 31. After completing the clamping, the clamping hand 28 structure will drive the circuit board to rise vertically. However, since this period of time is short, the second arc plate 32 no longer limits the circuit board, and the circuit board structure will not move far with the conveyor belt 34. At this time, the clamping hands 28 can still stably clamp the circuit board;

[0043] As the sliding rod 26 continues to rise, when the guide post 20 connected to one end of the sliding rod 26 touches the guide strip 21, since one end of the guide strip 21 is an arc structure, the guide post 20 will only move away from the detection box 4 at this time. The guide post 20 is limited by the guide strip 21 and keeps its height unchanged. At this time, the height of the guide post 20 is the same as the height of the horizontal part of the L-shaped groove 7. As the sliding rod 26 continues to move up, the flipping arm 12 starts to deflect, and the deflection direction is towards the detection box 4. When the sliding rod 26 completely slides into the horizontal part of the L-shaped groove 7, the sliding rod 26 and the guide post 20 are on the same horizontal plane, and the flipping arm 12 is in a horizontal state;

[0044] As the sliding rod 26 continues to slide towards the detection box 4 at the horizontal position of the L-shaped groove 7, at this time, the guide post 20 is driven to move reversely towards the detection box 4, and the circuit board is flipped to the vertical state and moves into the detection box 4. When the sliding rod 26 slides to the maximum distance, the structure of the sliding rod 26 can press the structure of the first button 18. At this time, the circuit board completely enters the detection box 4. The first button 18 has the function of controlling the expansion and contraction of the side cylinder 5. When the first button 18 is pressed, the telescopic end of the side cylinder 5 drives the pushing bar 23 to move in the detection box 4. The pushing bar 23 is used to push the circuit board to move in the detection box 4, so that when the circuit board is detected by the detector 6, the structure of the circuit board can move, reducing the probability of detection dead angles. At this time, the clamping position of the circuit board by the clamp 28 changes. The clamp 28 does not tightly clamp the circuit board. Therefore, in the initial stage, the circuit board is clamped left and right, and after flipping, it is clamped up and down to ensure that the circuit board clamped by the clamp 28 can move under the push of the pushing bar 23. The detector 6 on one side of the detection box 4 is used to scan the circuit conditions on the other side of the circuit board. The detector 6 mainly detects the appearance of the circuit board and does not need to contact the circuit board during the detection process. Therefore, the moving circuit board will not interfere with the appearance detection. The detector 6 will record the detection data of the circuit board and correlate it with the upper surface detection when the circuit board moves along the conveyor rail 14, making the subsequent maintenance of the circuit board more convenient;

[0045] The operation process of the reciprocating cylinder 16 is as follows: after waiting for the signal indicating that the clamping by the clamp 28 is completed, the structure starts to extend. When it extends to the maximum distance, when the sliding rod 26 contacts the horizontal end of the L-shaped groove 7 close to the detection box 4, at this time, the guide post 20 has not contacted the arc part of the guide bar 21. Then, after the reciprocating cylinder 16 waits for the signal indicating that the circuit board detection is completed, the structure starts to contract. At this time, the structure of the first button 18 is released from the pressed state, and the side cylinder 5 starts to contract. The sliding rod 26 resets along the original moving path. Since the flipping arm 12 may swing when the guide bar 21 and the guide post 20 separate when the flipping arm 12 flips from the horizontal state to the vertical state, the connection bar 19 is limited by setting the limit frame 22 to ensure that when the connection bar 19 moves out of or into the limit frame 22, the connection bar 19 can maintain the vertical state, ensuring that the clamp 28 contacts the first arc plate 31 vertically downward. When the structure of the second button 36 is pressed, the conveyor belt 34 resumes the state of transporting the circuit board and waits for one side of the circuit board to contact the sensor 37, thereby controlling the reciprocating cylinder 16 to convey the next circuit board;

[0046] After the detection is completed, the circuit board is re-placed on the conveying rail 14 by the clamping hand 28. Due to the position of the clamping hand 28 clamping on the circuit board and the action of the pushing bar 23 during the detection, the position of the clamping hand 28 clamping on the circuit board changes. Therefore, when the circuit board is re-placed on the conveying rail 14, the circuit board will press down on the arc plate two 32 with one end upturned. At this time, the spring 33 structure rotates and stores energy, and the conveyor belt 34 can drive the detected circuit board to move on it. When the circuit board separates from the arc plate two 32, one end of the arc plate two 32 will upturn again, driving the next circuit board to be detected to contact the sensor 37. Through this circuit board detection device, the other side of the circuit board can be detected seamlessly without manual or equipment flipping the circuit board for detection, greatly improving the detection efficiency of the circuit board.

[0047] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circuit board detection device, comprising a base, characterized in that: The base is connected with a back plate, which is connected with a detection box through a fixed frame, a detector is connected to one side of the detection box, a side cylinder is fixedly connected to the outside of the detection box, the telescopic end of the side cylinder penetrates the detection box and is connected to a push bar, an L-shaped groove is provided on the back plate, a sliding rod is slidably connected to the L-shaped groove, one end of the sliding rod is connected to a flip arm, one end of the flip arm is connected to a slide bar, and a gripper is slidably connected to the slide bar; The back plate is connected with a conveyor rail, a conveyor belt is connected to the conveyor rail, a hinged frame is connected to the lower end of the conveyor rail, arc plate 1 and arc plate 2 are rotatably connected to the hinged frame, a spring is connected between arc plate 1 and arc plate 2, the spring is sleeved on the hinged frame, a sensor is connected to one side of arc plate 2, a slot is provided on the conveyor rail, and a transfer mechanism is connected to the back plate to drive the flip arm to clamp the circuit board for transfer detection; A reciprocating cylinder is rotatably connected to the sliding rod, a cylinder frame is connected to the outer side of the reciprocating cylinder, and the cylinder frame is rotatably connected to one side of the back plate; The transfer mechanism includes a slider, a sleeve block is connected to the slider, the sleeve block is sleeved on the sliding rod, a lifting block is slidably connected to one side of the back plate, the sleeve block is slidably connected to one side of the lifting block, one end of the sliding rod is connected to a connecting strip, the other end of the connecting strip is connected to a guide column, the back plate is connected to a guide strip, button one and button two, and one end of the lifting block is connected to a pressing block.

2. A circuit board detection device according to claim 1, characterized in that: The telescopic end of the reciprocating cylinder is fixedly connected with a sleeve ring, which is sleeved on the sliding rod.

3. A circuit board detection device according to claim 1, characterized in that: The outer side of the cylinder frame is connected with a rotating shaft, one side of the back plate is connected with a sleeve seat, and one end of the rotating shaft is rotatably connected in the sleeve seat.

4. A circuit board detection device according to claim 1, characterized in that: One side of the back plate is fixedly connected with a slide rail one, two slide rails are provided, and the lifting block is slidably connected to the slide rail one.

5. A circuit board detection device according to claim 1, characterized in that: One side of the lifting block is fixedly connected with a second slide rail, and the sleeve block is slidably connected to the second slide rail.

6. A circuit board detection device according to claim 1, characterized in that: One side of the back plate is connected to a limiting frame, and the limiting frame is arranged at the outer side of the L-shaped groove.

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