Circuit board surface defect detection device
By designing a circuit board surface defect detection device, and utilizing a laser scanner and motor-driven movement, multi-face inspection of circuit boards was achieved, solving the problem of low efficiency in traditional inspection methods and improving inspection accuracy and safety.
Patent Information
- Application Number
- CN202520059650.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Traditional circuit board defect detection methods are inefficient, costly, and highly subjective, making it difficult to comprehensively inspect multiple surfaces of the circuit board.
A circuit board surface defect detection device was designed. It uses a laser scanner combined with a lifting motor and a drive motor to realize the vertical and horizontal movement of the laser scanner. The rotating plate enables multi-face detection of the circuit board. A transparent plate and a baffle are provided to improve the safety and convenience of operation.
It enables comprehensive inspection of the circuit board surface, improving the accuracy and completeness of the inspection, reducing labor costs, and enhancing inspection efficiency and safety.
Smart Images
Figure CN223897349U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit board technology, and in particular to a device for detecting defects on the surface of circuit boards. Background Technology
[0002] In industrial manufacturing, circuit boards are widely used electronic components. Circuit board manufacturing is complex and cumbersome, and various product defects can easily be introduced during the process. These defects are diverse, varying in color, shape, size, and shade. In actual production line quality control, for the sake of overall product yield, it is necessary to assess the severity of product defects and determine their type. Defect types include acceptable and unacceptable defects. Unacceptable defects require the circuit board to be scrapped, while acceptable defects can be passed to the next processing step. Therefore, accurate defect detection of circuit boards and accurate assessment of defect severity based on the detection results are crucial for factory cost control.
[0003] Traditional methods for detecting surface defects on PCBs mainly include manual inspection and contact inspection, but these methods suffer from problems such as high subjectivity and low efficiency. For example, manual inspection requires a large amount of manpower and resources, resulting in low efficiency and high costs. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a circuit board surface defect detection device.
[0005] This utility model is achieved using the following technical solution: a circuit board surface defect detection device, comprising a workbench, a support column at the bottom of the workbench, an anti-slip pad at the bottom of the support column, a control panel at the front of the workbench, a support frame at the top of the workbench, a fixing strip at the top of the support frame, a drive motor at the left end of the fixing strip, a threaded rod inside the fixing strip, a moving block on the surface of the threaded rod, a sliding groove at the bottom of the fixing strip, a slider at the bottom of the moving block, a processing box at the bottom of the slider, a lifting motor at the bottom of the processing box, a lifting rod at the bottom of the lifting motor, a laser scanner at the bottom of the lifting rod, a fixing block at the top of the workbench, a rotating motor at the left end of the fixing block, a bearing at the right end of the fixing block, a rotating rod at the right end of the bearing, a rotating plate at the right end of the rotating rod, a transparent plate at the top of the rotating plate, a baffle at the front end of the rotating plate, a placement groove inside the rotating plate, and an extension groove at the top of the workbench.
[0006] As a further improvement to the above solution, several support columns are provided, and the tops of the several support columns are fixedly connected to the bottom of the workbench. Several anti-slip pads are provided, and the tops of the several anti-slip pads are fixedly connected to the bottoms of the several support columns. The rear end of the control panel is fixedly connected to the front end of the workbench. Two support frames are provided, and the bottoms of the two support frames are fixedly connected to the top of the workbench.
[0007] Through the above technical solution, the workbench serves as the basic support structure of the entire device, providing a stable installation platform for other components and ensuring the stability of the device during the testing process. The anti-slip pad is installed at the bottom of the support column to increase the friction between the device and the placement surface, further improving the stability of the device.
[0008] As a further improvement to the above solution, the bottom end of the fixing strip is fixedly connected to the top ends of the two support frames, the right end of the drive motor is fixedly connected to the left end of the fixing strip, the left end of the threaded rod is driven to the output end of the right end of the drive motor through the left end of the inner wall of the fixing strip, the bottom end of the fixing strip is provided with a sliding groove, the inner wall of the moving block is driven to the surface of the threaded rod, and the surface of the slider is slidably connected to the inner wall of the sliding groove.
[0009] Through the above technical solution, the drive motor provides power to drive the threaded rod to rotate, thereby causing the moving block to move horizontally on the fixed strip, thus adjusting the horizontal position of the laser scanner. The threaded rod rotates under the drive of the drive motor and is connected to the inner wall of the moving block, converting the rotational motion of the motor into the linear motion of the moving block. The slide and the slider cooperate to provide guidance for the moving block, ensuring that the moving block can only move horizontally along the fixed strip.
[0010] As a further improvement to the above solution, the top end of the slider is fixedly connected to the bottom end of the moving block, the top end of the processing box is fixedly connected to the bottom end of the slider, the top end of the lifting motor is fixedly connected to the bottom end of the processing box, the output end of the bottom end of the lifting motor is connected to the top end of the lifting rod, and the top end of the laser scanner is fixedly connected to the bottom end of the lifting rod.
[0011] Through the above technical solution, the processing box is used to house some processing equipment or circuits related to laser scanning, and to perform preliminary processing on the data collected by the laser scanner. The lifting motor provides power to drive the lifting rod to move up and down, thereby adjusting the vertical position of the laser scanner. The lifting rod moves up and down under the drive of the lifting motor, which drives the laser scanner to move vertically, realizing scanning of different height positions of the circuit board. The laser scanner emits a laser beam to scan the surface of the circuit board, and analyzes the surface of the circuit board by receiving the reflected laser signal to determine whether there are defects.
[0012] As a further improvement to the above solution, two fixing blocks are provided, with the bottom ends of the two fixing blocks fixedly connected to the top of the workbench. The right end of the rotating motor is fixedly connected to the left end of the two fixing blocks. Two bearings are provided, with the ends of the two bearings that are far apart from each other being connected to the ends of the two fixing blocks that are close to each other. The left ends of the two bearings are connected to the output end of the right end of the rotating motor through the left ends of the two fixing blocks. Two transmission rods are provided, with the ends of the two rotating rods that are far apart from each other being connected to the ends of the two bearings that are close to each other.
[0013] Through the above technical solution, the rotating motor provides power to drive the rotating rod to rotate, thereby causing the rotating plate to rotate and changing the orientation of the circuit board, realizing the detection of multiple sides of the circuit board. The bearing connects the rotating rod and the fixed block, so that the rotating rod can rotate smoothly on the fixed block. The rotating rod rotates under the drive of the rotating motor, causing the rotating plate to rotate.
[0014] As a further improvement to the above solution, the surface of the rotating plate is fixedly connected to one end of the two rotating rods that are close to each other, two transparent plates are provided, the two transparent plates are opened on the surface of the transmission rod, the rear end of the baffle is engaged with the front end of the rotating plate, and the placement groove is opened inside the rotating plate.
[0015] Through the above technical solution, the rotating plate is used to place the circuit board. Its rotation can make different sides of the circuit board face the laser scanner to achieve comprehensive inspection. A transparent plate is opened on the surface of the rotating plate to facilitate the operator to observe the placement of the circuit board in the placement slot. The baffle prevents the circuit board from accidentally slipping during rotation and plays a protective role. The placement slot is used to place the circuit board to ensure that the circuit board is fixed in position during the inspection process.
[0016] As a further improvement to the above solution, an extension groove is provided at the top of the workbench, and the extension groove is located at the bottom of the rotating plate.
[0017] With the above technical solution, the extension groove is opened at the top of the worktable, providing space for the rotation of the rotating plate and avoiding interference between the rotating plate and the worktable.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] This invention utilizes a rotating plate within the device, which can rotate under the drive of a rotating motor. The rotating plate has internal slots for placing circuit boards, and its rotation allows different sides of the circuit board to face the laser scanner. This means the device can inspect multiple sides of the circuit board, avoiding the limitations of traditional inspection devices that can only inspect one side, thus enabling a more comprehensive detection of defects on the circuit board surface.
[0020] The laser scanner, through the cooperation of a lifting motor and a lifting rod, can adjust its vertical distance from the circuit board. Simultaneously, a moving block, driven by a threaded rod and a transmission motor, can move horizontally along a fixed bar, thereby moving the laser scanner horizontally. This ability to move both vertically and horizontally allows the laser scanner to cover all areas of the circuit board surface, ensuring comprehensive scanning and inspection, thus improving the accuracy and completeness of the inspection.
[0021] This invention features a transparent plate on a rotating plate, allowing operators to visually inspect the placement of circuit boards within the slots, facilitating accurate placement. Additionally, a baffle at the front of the rotating plate prevents circuit boards from accidentally slipping during rotation, enhancing operational safety and convenience.
[0022] The drive motor controls the horizontal movement of the moving block, while the lifting motor controls the vertical movement of the laser scanner. This motor-driven movement method makes the movement of the inspected components more precise and flexible. Operators can easily control the motor operation through the control panel, thereby adjusting the position of the laser scanner to adapt to the inspection needs of circuit boards of different sizes and shapes. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0024] Figure 2 This is a schematic diagram of the left end structure of this utility model;
[0025] Figure 3 This is a schematic diagram of the bottom structure of this utility model;
[0026] Figure 4 This is a schematic cross-sectional view of the present invention.
[0027] Figure 5 This is an enlarged structural diagram of point A in this utility model.
[0028] Explanation of key symbols:
[0029] 1. Workbench; 2. Support column; 3. Anti-slip mat; 4. Control panel; 5. Support frame; 6. Fixing strip; 7. Drive motor; 8. Threaded rod; 9. Moving block; 10. Slide rail; 11. Slider; 12. Processing box; 13. Lifting motor; 14. Lifting rod; 15. Laser scanner; 16. Fixing block; 17. Rotating motor; 18. Bearing; 19. Rotating rod; 20. Rotating plate; 21. Transparent plate; 22. Baffle; 23. Placement slot; 24. Extension slot. Detailed Implementation
[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0031] Example:
[0032] Please combine Figure 1-5 This embodiment of a circuit board surface defect detection device includes a workbench 1, a support column 2 at the bottom of the workbench 1, an anti-slip pad 3 at the bottom of the support column 2, a control panel 4 at the front of the workbench 1, a support frame 5 at the top of the workbench 1, a fixing strip 6 at the top of the support frame 5, a drive motor 7 at the left end of the fixing strip 6, a threaded rod 8 inside the fixing strip 6, a moving block 9 on the surface of the threaded rod 8, a sliding groove 10 at the bottom of the fixing strip 6, a slider 11 at the bottom of the moving block 9, and a processing box 12 at the bottom of the slider 11. A lifting motor 13 is installed at the bottom of the worktable 1. A lifting rod 14 is installed at the bottom of the lifting motor 13. A laser scanner 15 is installed at the bottom of the lifting rod 14. A fixing block 16 is installed at the top of the worktable 1. A rotating motor 17 is installed at the left end of the fixing block 16. A bearing 18 is installed at the right end of the fixing block 16. A rotating rod 19 is installed at the right end of the bearing 18. A rotating plate 20 is installed at the right end of the rotating rod 19. A transparent plate 21 is installed at the top of the rotating plate 20. A baffle 22 is installed at the front end of the rotating plate 20. A placement groove 23 is installed inside the rotating plate 20. An extension groove 24 is installed at the top of the worktable 1.
[0033] Several support columns 2 are provided, and the top of several support columns 2 is fixedly connected to the bottom of the workbench 1. Several anti-slip pads 3 are provided, and the top of several anti-slip pads 3 is fixedly connected to the bottom of several support columns 2. The rear end of the control panel 4 is fixedly connected to the front end of the workbench 1. Two support frames 5 are provided, and the bottom of the two support frames 5 is fixedly connected to the top of the workbench 1.
[0034] The bottom end of the fixing strip 6 is fixedly connected to the top of the two support frames 5. The right end of the drive motor 7 is fixedly connected to the left end of the fixing strip 6. The left end of the threaded rod 8 is connected to the output end of the right end of the drive motor 7 through the left end of the inner wall of the fixing strip 6. The bottom end of the fixing strip 6 is provided with a sliding groove 10. The inner wall of the moving block 9 is connected to the surface of the threaded rod 8. The surface of the slider 11 is slidably connected to the inner wall of the sliding groove 10.
[0035] The top of slider 11 is fixedly connected to the bottom of moving block 9, the top of processing box 12 is fixedly connected to the bottom of slider 11, the top of lifting motor 13 is fixedly connected to the bottom of processing box 12, the output end of the bottom of lifting motor 13 is connected to the top of lifting rod 14 for transmission, and the top of laser scanner 15 is fixedly connected to the bottom of lifting rod 14.
[0036] There are two fixed blocks 16, with the bottom ends of the two fixed blocks 16 fixedly connected to the top of the worktable 1. The right end of the rotating motor 17 is fixedly connected to the left end of the two fixed blocks 16. There are two bearings 18, with the ends of the two bearings 18 that are far apart from each other being connected to the ends of the two fixed blocks 16 that are close to each other. The left ends of the two bearings 18 are connected to the output end of the right end of the rotating motor 17 through the left ends of the two fixed blocks 16. There are two transmission rods, with the ends of the two rotating rods 19 that are far apart from each other being connected to the ends of the two bearings 18 that are close to each other.
[0037] The surface of the rotating plate 20 is fixedly connected to the two rotating rods 19 at their close ends. Two transparent plates 21 are provided, and the two transparent plates 21 are opened on the surface of the transmission rod. The rear end of the baffle 22 is engaged with the front end of the rotating plate 20. The placement groove 23 is opened inside the rotating plate 20.
[0038] The top of the workbench 1 is provided with an extension groove 24, which is located at the bottom of the rotating plate 20.
[0039] The implementation principle of the circuit board surface defect detection device in this embodiment is as follows: The operator places the circuit board in the placement slot 23 inside the rotating plate 20. Since there is a transparent plate 21 on the rotating plate 20, the placement can be easily observed to ensure that the circuit board is placed accurately. After placement, the baffle 22 plays a certain blocking role to prevent the circuit board from shifting in subsequent operations. When the circuit board needs to be inspected, the drive motor 7 is started, and the output end of the drive motor 7 drives the threaded rod 8 to rotate. Since the inner wall of the moving block 9 is connected to the surface of the threaded rod 8, the moving block 9 will move horizontally along the threaded rod 8. The slider 11 at the bottom of the moving block 9 cooperates with the sliding groove 10 at the bottom of the fixing strip 6 to ensure the smooth movement of the moving block 9. At the same time, the lifting motor 13 can also be started as needed. The output end of the lifting motor 13 drives the... The lifting rod 14 moves up and down, thereby driving the laser scanner 15 to move vertically. Through horizontal and vertical movement, the laser scanner 15 can reach various positions on the surface of the circuit board. The rotating motor 17 is started, and its output end drives the rotating rod 19 to rotate through the bearing 18, which in turn causes the rotating plate 20 to rotate. The rotation of the rotating plate 20 can change the orientation of the circuit board, so that different sides of the circuit board can face the laser scanner 15 in sequence. When different sides of the circuit board face the laser scanner 15, the laser scanner 15 emits a laser beam to scan the surface of the circuit board. The laser scanner 15 analyzes the condition of the circuit board surface based on the reflected laser signal to determine whether there are defects. Since the laser scanner 15 can move in both horizontal and vertical directions, it can scan and inspect various areas of each side of the circuit board.
[0040] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A circuit board surface defect detection device, characterized in that, The system includes a workbench (1), a support column (2) at the bottom of the workbench (1), an anti-slip pad (3) at the bottom of the support column (2), a control panel (4) at the front of the workbench (1), a support frame (5) at the top of the workbench (1), a fixing strip (6) at the top of the support frame (5), a drive motor (7) at the left end of the fixing strip (6), a threaded rod (8) inside the fixing strip (6), a moving block (9) on the surface of the threaded rod (8), a sliding groove (10) at the bottom of the fixing strip (6), a slider (11) at the bottom of the moving block (9), a processing box (12) at the bottom of the slider (11), and a lifting mechanism at the bottom of the processing box (12). The motor (13) has a lifting rod (14) at its bottom end, a laser scanner (15) at its bottom end, a fixing block (16) at the top end of the worktable (1), a rotating motor (17) at the left end of the fixing block (16), a bearing (18) at the right end of the fixing block (16), a rotating rod (19) at the right end of the bearing (18), a rotating plate (20) at the right end of the rotating rod (19), a transparent plate (21) at the top end of the rotating plate (20), a baffle (22) at the front end of the rotating plate (20), a placement groove (23) inside the rotating plate (20), and an extension groove (24) at the top end of the worktable (1).
2. The circuit board surface defect detection device as described in claim 1, characterized in that: The support columns (2) are provided in several units, and the top of the support columns (2) is fixedly connected to the bottom of the workbench (1). The anti-slip pads (3) are provided in several units, and the top of the anti-slip pads (3) is fixedly connected to the bottom of the support columns (2). The rear end of the control panel (4) is fixedly connected to the front end of the workbench (1). There are two support frames (5), and the bottom of the two support frames (5) is fixedly connected to the top of the workbench (1).
3. The circuit board surface defect detection device as described in claim 1, characterized in that: The bottom end of the fixing strip (6) is fixedly connected to the top end of the two support frames (5). The right end of the transmission motor (7) is fixedly connected to the left end of the fixing strip (6). The left end of the threaded rod (8) is connected to the output end of the right end of the transmission motor (7) through the left end of the inner wall of the fixing strip (6). The bottom end of the fixing strip (6) is provided with a sliding groove (10). The inner wall of the moving block (9) is connected to the surface of the threaded rod (8). The surface of the slider (11) is slidably connected to the inner wall of the sliding groove (10).
4. The circuit board surface defect detection device as described in claim 1, characterized in that: The top of the slider (11) is fixedly connected to the bottom of the moving block (9), the top of the processing box (12) is fixedly connected to the bottom of the slider (11), the top of the lifting motor (13) is fixedly connected to the bottom of the processing box (12), the output end of the bottom of the lifting motor (13) is connected to the top of the lifting rod (14) via transmission, and the top of the laser scanner (15) is fixedly connected to the bottom of the lifting rod (14).
5. The circuit board surface defect detection device as described in claim 1, characterized in that: Two fixed blocks (16) are provided, and the bottom ends of the two fixed blocks (16) are fixedly connected to the top of the workbench (1). The right end of the rotating motor (17) is fixedly connected to the left end of the two fixed blocks (16). Two bearings (18) are provided, and the ends of the two bearings (18) that are far apart from each other are connected to the ends of the two fixed blocks (16) that are close to each other. The left ends of the two bearings (18) are connected to the output end of the right end of the rotating motor (17) through the left ends of the two fixed blocks (16). Two transmission rods are provided, and the ends of the two rotating rods (19) that are far apart from each other are connected to the ends of the two bearings (18) that are close to each other.
6. The circuit board surface defect detection device as described in claim 1, characterized in that: The surface of the rotating plate (20) is fixedly connected to one end of the two rotating rods (19) that are close to each other. There are two transparent plates (21), which are opened on the surface of the transmission rod. The rear end of the baffle (22) is engaged with the front end of the rotating plate (20). The placement groove (23) is opened inside the rotating plate (20).
7. The circuit board surface defect detection device as described in claim 1, characterized in that: The top of the workbench (1) is provided with an extension groove (24), which is located at the bottom of the rotating plate (20).