A PCB circuit board defect inspection device

Abstract

The present application relates to the technical fields of circuit board detection, more specifically, it relates to a kind of PCB circuit board defect inspection device, including support frame, and the support frame top two sides are respectively provided with first support side plate and second support side plate, the first support side plate one side is provided with L-shaped support, and visual detection camera is arranged on the L-shaped support, U-shaped support is fixedly installed in the lower end of one side of the L-shaped support, and first drive motor is fixedly installed on the U-shaped support, PCB turnover mechanism is arranged between the output shaft of the first drive motor and the second support side plate, and the visual detection camera is located above PCB turnover mechanism, the PCB turnover mechanism includes the detection frame fixedly connected with the output shaft of the first drive motor, the problems, such as low efficiency, low precision and new damage to circuit board caused by traditional PCB circuit board defect detection method are solved.

Description

Technical Field

[0001] This invention relates to the field of circuit board inspection technology, and more specifically, to a PCB circuit board defect inspection device. Background Technology

[0002] In the PCB manufacturing process, defect detection is a crucial step in ensuring product quality. Traditional PCB defect detection methods mainly rely on manual visual inspection or preliminary screening using simple mechanical devices. However, these methods suffer from low efficiency, low detection accuracy, and susceptibility to human factors.

[0003] With the rapid development of the electronics industry, PCB circuit boards are becoming increasingly integrated and complex, placing higher demands on defect detection. Traditional inspection methods are no longer sufficient to meet the high-efficiency, high-precision inspection requirements of modern PCB production. In particular, minor defects such as wear and scratches on both sides of PCB circuit boards are often difficult to detect by manual visual inspection, and simple mechanical devices cannot achieve comprehensive and accurate detection.

[0004] In addition, existing PCB circuit board inspection equipment often requires the PCB circuit board to be flipped and moved multiple times during the inspection process. This not only increases the inspection time, but also easily causes new scratches and wear on the PCB circuit board during the inspection process, which further affects the accuracy of the inspection and the final quality of the product.

[0005] To address the aforementioned issues, a PCB circuit board defect inspection device is proposed. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the problems existing in the prior art, the present invention provides a PCB circuit board defect inspection device to solve the problems mentioned in the background art, such as low efficiency, low accuracy, and easy to cause new damage to the circuit board by traditional PCB circuit board defect detection methods.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a PCB circuit board defect inspection device, comprising a support frame, wherein a first support side plate and a second support side plate are respectively provided on both sides of the top of the support frame, an L-shaped bracket is provided on one side of the first support side plate, and a visual inspection camera is provided on the L-shaped bracket, a U-shaped bracket is fixedly installed at the lower end of one side of the L-shaped bracket, and a first drive motor is fixedly installed on the U-shaped bracket, a PCB flipping mechanism is provided between the output shaft of the first drive motor and the second support side plate, and the visual inspection camera is located above the PCB flipping mechanism;

[0010] The PCB flipping mechanism includes a detection frame fixedly connected to the output shaft of the first drive motor. The detection frame has a accommodating cavity, a first detection port, and a second detection port that are interconnected. The first detection port and the second detection port are opposite to each other and are staggered.

[0011] The PCB flipping mechanism also includes a positioning component and a flipping misalignment adjustment component disposed in the accommodating cavity, as well as an edge support component slidably mounted on the second detection port and a bottom support component disposed on the first detection port;

[0012] A second drive motor is provided on the side of the first support side plate away from the L-shaped bracket, and the output shaft of the second drive motor passes through the first support side plate and is fixedly connected to the L-shaped bracket.

[0013] The present invention is further configured such that a sliding groove is provided on the side wall of the second detection port, and the edge support assembly is slidably installed in the sliding groove.

[0014] The present invention is further configured such that the edge support assembly includes a slider slidably installed in the groove, an edge support plate that is movably matched with the second detection port, and a baffle plate disposed on the edge support plate.

[0015] The present invention is further configured such that the face-changing misalignment adjustment component includes an electric telescopic rod disposed on the side of the detection frame away from the opening end of the accommodating cavity, and a limiting block disposed on the inner wall of the accommodating cavity near the first detection port.

[0016] The present invention is further configured such that the baffle is provided with an avoidance groove, and the avoidance groove corresponds to a limiting block.

[0017] The present invention is further configured such that the positioning component includes electric push rods disposed at both ends of the detection frame, push plates symmetrically disposed within the accommodating cavity, and rotating rollers disposed on the push plates.

[0018] The present invention is further configured such that the bottom support assembly includes a bottom support member disposed on the side of the first detection port away from the face-changing misalignment adjustment assembly, and an electromagnetic strip magnetically attracted to the bottom support member.

[0019] The present invention is further configured such that an embedded groove and a guide hole are provided on the side of the first detection port away from the face-changing misalignment adjustment component, and the bottom support is disposed in the embedded groove.

[0020] The present invention is further configured such that the bottom support includes a bottom support block disposed in the embedded groove, a guide rod and a magnet disposed at one end of the bottom support block, and an anti-detachment block disposed at the end of the guide rod away from the bottom support block.

[0021] The present invention is further configured such that when the electromagnetic strip and the magnet are magnetically attracted to each other, the bottom support block is matched and inserted into the embedded slot, the guide rod extends through the guide hole to the outside of the detection frame, and when the anti-detachment block is attached to the detection frame, the bottom support block is still partially located in the embedded slot.

[0022] (III) Beneficial Effects

[0023] Compared with the prior art, the present invention provides a PCB circuit board defect inspection device, which has the following beneficial effects:

[0024] 1. This invention achieves automatic flip-over inspection of PCB boards through the design of a flip inspection frame, which greatly improves inspection efficiency and comprehensiveness. At the same time, by utilizing the hollow structure characteristics of the first and second inspection ports, friction and scratches on the PCB board during the process of entering the inspection frame are effectively reduced, protecting the surface quality of the PCB board, thereby significantly improving the accuracy of inspection and the yield rate of products.

[0025] 2. The present invention uses a non-fall-off structure composed of a face-changing misalignment adjustment component, an edge support component, and a bottom support component, which works in conjunction with the angular rotation of the first drive motor and the second drive motor to achieve stable support and non-fall-off function for the PCB board during the face-changing inspection process, effectively ensuring the reliability and efficiency of the inspection process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a PCB circuit board defect inspection device.

[0027] Figure 2 This is a schematic diagram of the PCB flipping mechanism.

[0028] Figure 3 This is a structural diagram showing the location of the support component in the initial state of the PCB flipping mechanism.

[0029] Figure 4 This is a schematic diagram of the structure when the first detection port of the PCB circuit board is used for image acquisition.

[0030] Figure 5 This is a schematic diagram showing the positional structure between the edge support assembly and the limiting block when the edge support assembly abuts against the electric telescopic rod in its extended state.

[0031] Figure 6 This is a schematic diagram of the bottom support component.

[0032] Figure 7 This is a structural diagram of the support component.

[0033] Figure 8 A schematic diagram of the structure of an electric telescopic pole during its first stage of retraction.

[0034] Figure 9 This is a schematic diagram of the structure for image acquisition at the second detection port of the PCB circuit board.

[0035] In the diagram: 1. Support frame; 101. First support side plate; 102. Second support side plate; 2. L-shaped bracket; 3. Visual inspection camera; 4. U-shaped bracket; 5. First drive motor; 6. PCB flipping mechanism; 601. Detection frame; 602. Accommodation cavity; 603. First detection port; 604. Second detection port; 605. Positioning component; 605a. Electric push rod; 605b. Push plate; 605c. Rotating roller; 606. PCB flipping misalignment adjustment component; 606a 606b, Electric telescopic rod; 607, Limiting block; 608, Side support assembly; 609, Slider; 6002, Side support plate; 6003, Baffle; 6004, Clearance slot; 6005, Bottom support assembly; 6006a, Bottom support piece; 6006a-1, Bottom support block; 6006a-2, Guide rod; 6006a-3, Magnet; 6006a-4, Anti-detachment block; 6006b, Electromagnetic strip; 6006, Slide groove; 610, Embedded slot; 611, Guide hole; 7, Second drive motor. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0038] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0039] For examples, please refer to Figure 1 - Figure 9 A PCB circuit board defect inspection device includes a support frame 1, and a first support side plate 101 and a second support side plate 102 are respectively provided on the top two sides of the support frame 1. An L-shaped bracket 2 is provided on one side of the first support side plate 101, and a vision inspection camera 3 is provided on the L-shaped bracket 2. A U-shaped bracket 4 is fixedly installed at the lower end of one side of the L-shaped bracket 2, and a first drive motor 5 is fixedly installed on the U-shaped bracket 4. A PCB flipping mechanism 6 is provided between the output shaft of the first drive motor 5 and the second support side plate 102, and the vision inspection camera 3 is located above the PCB flipping mechanism 6.

[0040] The PCB flipping mechanism 6 includes a detection frame 601 fixedly connected to the output shaft of the first drive motor 5. The detection frame 601 has a accommodating cavity 602, a first detection port 603 and a second detection port 604 that are interconnected. The first detection port 603 and the second detection port 604 are opposite faces and are staggered.

[0041] The PCB flipping mechanism 6 also includes a positioning component 605 and a flipping misalignment adjustment component 606 disposed in the accommodating cavity 602, as well as an edge support component 607 slidably mounted on the second detection port 604 and a bottom support component 608 disposed in the first detection port 603;

[0042] A second drive motor 7 is provided on the side of the first support side plate 101 away from the L-shaped bracket 2, and the output shaft of the second drive motor 7 passes through the first support side plate 101 and is fixedly connected to the L-shaped bracket 2.

[0043] This invention is used in PCB circuit board production lines to detect defects such as wear and scratches on both sides of PCB circuit boards. Specifically, the support frame 1 of this invention is equipped with conveyor belts at both ends, namely a loading conveyor belt and a unloading conveyor belt. One end of the receiving cavity 602 is open, allowing the loading conveyor belt to transport the PCB circuit board into the receiving cavity 602. The space of the receiving cavity 602 is larger than the size of the PCB circuit board to be inspected, allowing it to smoothly enter through the opening of the receiving cavity 602. In its initial state, the edge support assembly 607 is located at the end of the second detection port 604 near the opening of the receiving cavity 602, so that when the PCB circuit board enters... One end of the PCB circuit board first enters and touches the bottom of the receiving cavity 602. Then, as the feeding conveyor belt transports the PCB circuit board, one end slides onto the edge support assembly 607 and pushes the edge support assembly 607 to slide. The edge support assembly 607 supports one end of the PCB circuit board, preventing the PCB circuit board from falling out of the second detection port 604 when moving in the receiving cavity 602. At the same time, the setting of the first detection port 603 and the second detection port 604 ensures that the friction contact time of the PCB circuit board when entering and exiting the receiving cavity 602 is short and the area is small, thereby reducing scratches and wear caused during the inspection process.

[0044] After the PCB circuit board is conveyed by the feeding conveyor belt, it enters the receiving cavity 602. However, the end of the PCB circuit board away from the edge support assembly 607 is either outside the detection frame 601 or inside the receiving cavity 602, but partially blocked by the inner wall of the detection frame 601, and cannot be fully displayed through the first detection port 603. At this time, the first drive motor 5 drives the detection frame 601 to rotate a certain angle, causing the detection frame 601 to tilt and the opening of the receiving cavity 602 to tilt upward. As a result, the PCB circuit board inside the receiving cavity 602 pushes the edge support assembly 607 towards the face-changing misalignment adjustment assembly 606 under the action of gravity. When the PCB circuit board pushes the edge support assembly 607 to move and abut against the face-changing misalignment adjustment assembly 606, the PCB circuit board moves along its length (length direction refers to the conveying direction of the conveyor belt, width direction) and slides towards the face-changing misalignment adjustment assembly 606. The two ends of the PCB circuit board (in the width direction of the conveyor belt) are aligned with the two ends of the length direction of the first detection port 603, so that the length direction of the PCB circuit board can be fully displayed in the first detection port 603. However, since the position of the PCB circuit board cannot be fully aligned with the width of the first detection port 603 when it enters, part of the width direction of the PCB circuit board is still blocked, preventing the vision inspection camera 3 from taking pictures. At this time, the positioning component 605 symmetrically arranged in the accommodating cavity 602 centers the PCB circuit board, so that its width corresponds to the width of the first detection port 603, thereby realizing the full display of the PCB circuit board. Then, by rotating the second drive motor 7, the vision inspection camera 3 is adjusted so that the vision inspection camera 3 and the PCB circuit board on the tilted detection frame 601 are parallel and correspond, so that the vision inspection camera 3 can perform more accurate image capture and analysis.

[0045] It should be noted that since the first detection port 603 and the second detection port 604 are staggered, when the PCB circuit board is fully displayed through the first detection port 603 in both length and width directions, the two ends of the PCB circuit board in the length direction act on the support assembly 607 and the frame of the detection frame 601 respectively, so that it will not fall out of the second detection port 604.

[0046] After the front detection is completed, the PCB circuit board is adjusted by driving the face-changing misalignment adjustment component 606, so that the PCB circuit board can move down again under the action of gravity, thereby causing the PCB circuit board and the first detection port 603 to be misaligned in the length direction. This allows one end of the PCB circuit board to be supported by the frame of the detection frame 601. At the same time, the bottom support component 608 is unlocked, allowing the bottom support component 608 to slide and protrude into the first detection port 603 under the action of vertical gravity, thereby supporting the other end of the PCB circuit board.

[0047] It should be noted that at this time, the PCB circuit board, the first detection port 603, and the second detection port 604 are all misaligned. The PCB circuit board will not fall off no matter which side it is tilted to in the accommodating cavity 602.

[0048] Then, the first drive motor 5 drives the detection frame 601 to continue rotating, and the second drive motor 7 drives the L-shaped bracket 2 to rotate in the opposite direction, so that the final detection frame 601 and the visual inspection camera 3 on the L-shaped bracket 2 rotate to the position shown in the image. Figure 9 As shown, the opening of the accommodating cavity 602 is tilted upwards towards the unloading conveyor belt, while the vision inspection camera 3 is perpendicular to the inclined surface of the detection frame 601. Then, it drives the face-changing misalignment adjustment component 606 to adjust, so that the PCB circuit board can move downwards again under the action of tilted gravity, so that the reverse side of the PCB circuit board is completely aligned with the second detection port 604, and the reverse side of the PCB circuit board can be completely captured and analyzed by the vision inspection camera 3.

[0049] Finally, after the front and back images are captured and analyzed, the first drive motor 5 continues to drive the detection frame 601 to rotate. When the opening of the accommodating cavity 602 on the detection frame 601 faces downward, the PCB circuit board slides onto the unloading conveyor belt and is transported under the action of gravity. At the same time, the PCB circuit board is pushed out of the conveyor belt by the reversal adjustment component 606, thereby improving its unloading efficiency.

[0050] It should be noted that the unloading conveyor belt is equipped with a corresponding defect screening mechanism to remove defective PCB circuit boards from the unloading conveyor belt.

[0051] After the PCB circuit board is conveyed onto the unloading conveyor belt, the first drive motor 5 continues to drive the detection frame 601 to rotate, so that the opening of the accommodating cavity 602 of the detection frame 601 first moves vertically downward, causing the bottom support component 608 and the edge support component 607 to automatically reset. At the same time, the positioning component 605 is actively reset. Then, the opening of the accommodating cavity 602 on the detection frame 601 is rotated to face horizontally toward the loading conveyor belt for the detection of the next PCB circuit board.

[0052] A groove 609 is provided on the side wall of the second detection port 604, and the edge support assembly 607 is slidably installed in the groove 609.

[0053] The edge support assembly 607 includes a slider 607a slidably mounted in the slide groove 609, an edge support plate 607b that is movably matched with the second detection port 604, and a baffle 607c disposed on the edge support plate 607b.

[0054] Slider 607a is disposed at both ends of support plate 607b, and support plate 607b is slidably mounted in second detection port 604 via slider 607a. The upper and lower end faces of support plate 607b are flush with the outer surface of detection frame 601 and the inner wall of accommodating cavity 602, respectively. This allows PCB circuit boards to slide from the inner wall of accommodating cavity 602 onto support plate 607b after entering from the feeding conveyor belt. Support plate 607b and baffle 607c are arranged in an L-shape. Baffle 607c abuts against one end of PCB circuit board, thereby allowing PCB circuit boards input from the feeding conveyor belt to push support assembly 607 to move in second detection port 604, thus preventing PCB circuit boards from falling out of second detection port 604 during input.

[0055] The face-changing misalignment adjustment component 606 includes an electric telescopic rod 606a disposed on the side of the detection frame 601 away from the opening end of the accommodating cavity 602, and a limiting block 606b disposed on the inner wall of the accommodating cavity 602 near the first detection port 603.

[0056] The baffle 607c has an clearance slot 607d, and the clearance slot 607d corresponds to the limit block 606b.

[0057] The electric telescopic rod 606a extends through the detection frame 601 to the inner wall of the accommodating cavity 602. In the initial state, the electric telescopic rod 606a is in an extended state, so that when the front of the PCB circuit board is detected through the first detection port 603, when one end of the PCB circuit board pushes the baffle 607c to abut the end of the extended electric telescopic rod 606a, the length direction of the PCB circuit board is aligned with the length direction of the first detection port 603.

[0058] Multiple sets of limiting blocks 606b are arranged in a linear array. The electric telescopic rod 606a is aligned with the end of the limiting block 606b when it is extended. When the PCB circuit board is flipped for inspection, the electric telescopic rod 606a first retracts. The retraction distance is less than the length distance in the direction of contact between the PCB circuit board and the inner wall of the accommodating cavity 602 when the PCB circuit board is detected through the first detection port 603. That is, the PCB circuit board will not fall out of the second detection port 604 when it is retracted. Then, when the bottom support component 608 is unlocked in the tilted state of the detection frame 601, the bottom support component 608 slides out into the first detection port 603 by gravity, so that the PCB circuit board also cannot fall out of the first detection port 603.

[0059] Furthermore, when the electric telescopic rod 606a retracts, the PCB circuit board and the edge support assembly 607 slide down within the inclined detection frame 601. However, the distance it slides down is less than the thickness of the baffle 607c. This causes the limiting block 606b on the edge support assembly 607 to be located within the clearance slot 607d after the baffle 607c slides down, but it does not protrude. At this time, one end of the PCB circuit board is still in contact with the baffle 607c. Its downward movement causes the PCB circuit board and the first detection port 603 to be misaligned. As the first drive motor 5 rotates, the PCB circuit board inside the detection frame 601 will change from being attached to the second detection port 604 to being attached to the first detection port 603. The two ends of the PCB circuit board attached to the first detection port 603 respectively abut against the inner wall of the accommodating cavity 602 near the first detection port 603 and the bottom support assembly 608.

[0060] However, it should be noted that at this time, the two ends of the PCB circuit board along its length and the two ends of the second detection port 604 along its length are not aligned. When the detection frame 601 rotates to the position shown... Figure 9 At the indicated angle, the electric telescopic rod 606a retracts in two stages. This retraction causes the limiting block 606b to protrude from the baffle 607c and fit against the end of the sliding PCB circuit board, thereby achieving alignment in the length direction. Finally, the visual inspection camera 3 performs image capture and analysis on the second side of the PCB circuit board.

[0061] The positioning component 605 includes electric push rods 605a disposed at both ends of the detection frame 601, push plates 605b symmetrically disposed in the accommodating cavity 602, and rotating rollers 605c disposed on the push plates 605b.

[0062] The push plate 605b and the telescopic end of the electric push rod 605a are fixedly connected. The push plate 605b centers the PCB circuit board by pushing the electric push rod 605a, so that the width of the PCB circuit board is aligned with the width of the first detection port 603 and the second detection port 604. At the same time, the rotating roller 605c enables the positioned PCB circuit board to slide normally under the action of gravity.

[0063] The bottom support assembly 608 includes a bottom support member 608a disposed on the side of the first detection port 603 away from the face-changing misalignment adjustment assembly 606, and an electromagnetic strip 608b magnetically attracted to the bottom support member 608a.

[0064] Multiple linear arrays of support members 608a are magnetically locked together by an electromagnetic strip 608b, causing the support members 608a to protrude into the first detection port 603, thus avoiding interference with image acquisition of the PCB circuit board. After the visual inspection camera 3 acquires an image of one side of the PCB circuit board through the first detection port 603, the electromagnetic strip 608b is de-energized, causing the support members 608a to slide along the inclined detection frame 601 and enter the first detection port 603 to support the PCB circuit board.

[0065] It should be noted that when images are captured on both sides of the PCB circuit board, the detection frame 601 is tilted so that the PCB circuit board can move and slide down under the action of gravity, thereby aligning the two ends of the PCB circuit board along its length with the two ends of the first detection port 603 or the second detection port 604.

[0066] The first detection port 603 has an embedded groove 610 and a guide hole 611 on the side away from the face-changing misalignment adjustment component 606, and the bottom support 608a is disposed in the embedded groove 610.

[0067] The bottom support 608a includes a bottom support block 608a-1 disposed in the recessed slot 610, a guide rod 608a-2 and a magnet 608a-3 disposed at one end of the bottom support block 608a-1, and an anti-detachment block 608a-4 disposed at the end of the guide rod 608a-2 away from the bottom support block 608a-1.

[0068] When the electromagnetic strip 608b and the magnet 608a-3 are magnetically attracted to each other, the bottom support block 608a-1 is matched and inserted into the embedded slot 610. The guide rod 608a-2 extends through the guide hole 611 to the outside of the detection frame 601. When the anti-detachment block 608a-4 is attached to the detection frame 601, the bottom support block 608a-1 is still partially located in the embedded slot 610.

[0069] In the initial state, the electromagnetic strip 608b is energized to magnetically attract the magnet 608a-3 on the support block 608a-1, causing the support block 608a-1 to be matched and locked in the embedded slot 610, preventing the support block 608a-1 from protruding and affecting the image acquisition of the first detection port 603. When the PCB circuit board is flipped, the electromagnetic strip 608b is de-energized, causing the support block 608a-1 to slide into the first detection port 603 under the action of gravity, thereby supporting the PCB circuit board and preventing the PCB circuit board from falling out of the first detection port 603.

[0070] Two sets of guide holes 611 and guide rods 608a-2 are provided. Magnets 608a-3 are located in the middle of the two guide rods 608a-2. The anti-detachment block 608a-4 is provided to prevent the bottom support block 608a-1 from slipping out of the inner groove 610 under the action of gravity.

[0071] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PCB circuit board defect inspection device, characterized in that: The system includes a support frame (1), and a first support side plate (101) and a second support side plate (102) are respectively provided on the top two sides of the support frame (1). An L-shaped bracket (2) is provided on one side of the first support side plate (101), and a visual inspection camera (3) is provided on the L-shaped bracket (2). A U-shaped bracket (4) is fixedly installed on the lower end of one side of the L-shaped bracket (2), and a first drive motor (5) is fixedly installed on the U-shaped bracket (4). A PCB flipping mechanism (6) is provided between the output shaft of the first drive motor (5) and the second support side plate (102), and the visual inspection camera (3) is located above the PCB flipping mechanism (6). The PCB flipping mechanism (6) includes a detection frame (601) fixedly connected to the output shaft of the first drive motor (5). The detection frame (601) has a accommodating cavity (602), a first detection port (603), and a second detection port (604) that are interconnected. The first detection port (603) and the second detection port (604) are opposite to each other and are staggered. The PCB flipping mechanism (6) further includes a positioning component (605) and a flipping misalignment adjustment component (606) disposed in the accommodating cavity (602), as well as an edge support component (607) slidably mounted on the second detection port (604) and a bottom support component (608) disposed on the first detection port (603). The second detection port (604) has a sliding groove (609) on its side wall, and the edge support assembly (607) is slidably installed in the sliding groove (609); The edge support assembly (607) includes a slider (607a) slidably mounted in the slide groove (609), an edge support plate (607b) that is movably matched with the second detection port (604), and a baffle (607c) disposed on the edge support plate (607b). The face-changing misalignment adjustment component (606) includes an electric telescopic rod (606a) disposed on the side of the detection frame (601) away from the opening end of the accommodating cavity (602), and a limiting block (606b) disposed on the inner wall of the accommodating cavity (602) near the first detection port (603). The baffle (607c) is provided with an avoidance slot (607d), and the avoidance slot (607d) corresponds to the limiting block (606b). A second drive motor (7) is provided on the side of the first support side plate (101) away from the L-shaped bracket (2), and the output shaft of the second drive motor (7) passes through the first support side plate (101) and the L-shaped bracket (2) and is fixedly connected.

2. The PCB circuit board defect inspection device according to claim 1, characterized in that: The positioning component (605) includes an electric push rod (605a) disposed at both ends of the detection frame (601), a push plate (605b) symmetrically disposed in the accommodating cavity (602), and a rotating roller (605c) disposed on the push plate (605b).

3. The PCB circuit board defect inspection device according to claim 2, characterized in that: The bottom support assembly (608) includes a bottom support member (608a) disposed on the side of the first detection port (603) away from the face-changing misalignment adjustment assembly (606), and an electromagnetic strip (608b) magnetically attracted to the bottom support member (608a).

4. The PCB circuit board defect inspection device according to claim 3, characterized in that: The first detection port (603) has an embedded slot (610) and a guide hole (611) on the side away from the face-changing misalignment adjustment component (606), and the bottom support (608a) is disposed in the embedded slot (610).

5. A PCB circuit board defect inspection device according to claim 4, characterized in that: The bottom support (608a) includes a bottom support block (608a-1) disposed in the embedded groove (610), a guide rod (608a-2) and a magnet (608a-3) disposed at one end of the bottom support block (608a-1), and an anti-detachment block (608a-4) disposed at the end of the guide rod (608a-2) away from the bottom support block (608a-1).

6. A PCB circuit board defect inspection device according to claim 5, characterized in that: When the electromagnetic strip (608b) and the magnet (608a-3) are magnetically attracted to each other, the bottom support block (608a-1) is matched and inserted into the embedded slot (610). The guide rod (608a-2) extends through the guide hole (611) to the outside of the detection frame (601). When the anti-detachment block (608a-4) is attached to the detection frame (601), the bottom support block (608a-1) is still partially located in the embedded slot (610).

Images