AOI optical detection table for circuit board

Abstract

The utility model discloses a kind of AOI optical detection platform for circuit board, including cabinet, mounting area is set in cabinet one side outer wall, and mounting area inside is equipped with bearing assembly, bearing assembly includes shell, tray piece is installed in shell inside through bearing, shell one side outer wall is equipped with rotating motor through bolt, and the output of rotating motor is fixedly connected between the one side of tray piece through flat key, tray piece includes frame, the output of rotating motor is connected together through flat key and frame;The utility model operation rotating motor starts, rotating motor drives tray piece infinitely variable speed rotation, so that tray piece rotates with its internal circuit board, can adjust circuit board to arbitrary detection angle, to facilitate in carrying out AOI optical detection, avoid the visual blind area of traditional fixed detection platform, realize the full-angle coverage detection of circuit board front and back, improve the multi-scene adaptation ability of the device, provide more reliable solution for high-density, high-precision circuit board detection.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing technology, specifically to an AOI optical inspection station for circuit boards. Background Technology

[0002] Circuit boards are named as follows: ceramic circuit board, alumina ceramic circuit board, aluminum nitride ceramic circuit board, PCB board, aluminum substrate, high frequency board, thick copper board, impedance board, PCB, ultra-thin circuit board, ultra-thin circuit board, printed circuit board (copper etching technology), etc. Circuit boards miniaturize and visualize circuits, playing an important role in the mass production of fixed circuits and the optimization of electrical appliance layout. Circuit board production requires various processing equipment, and AOI optical inspection tables are needed to improve product quality.

[0003] For example, patent application CN201822164308.6, with an authorization announcement date of 20191011, discloses an AOI optical inspection station for circuit boards specifically designed for electric vehicles. The station includes an AOI optical inspection station body, with support legs fixedly connected to both sides of the bottom of the body. An equipment box is fixedly connected to the inner side of each support leg, and the top of the equipment box is fixedly connected to the bottom of the AOI optical inspection station body. This invention solves the problem of existing AOI optical inspection stations being inconvenient for users to move by using a combination of the AOI optical inspection station body, support legs, equipment box, cylinder, crossbar, transmission block, hollow column, spring, sliding column, connecting rod, trapezoidal block, transmission groove, vertical plate, toothed plate, bearing, rotating shaft, gear, disc, transmission rod, positioning rod, positioning ring, transmission frame, bracket, and rollers. This AOI optical inspection station for circuit boards specifically designed for electric vehicles has the advantage of easy mobility, saving users a significant amount of time and improving the portability of the AOI optical inspection station.

[0004] In the field of circuit board manufacturing, AOI optical inspection stations are key quality control equipment, and their accuracy, efficiency, and functionality directly affect production yield. Existing technologies, such as the patent application CN201822164308.6 (authorization announcement date October 11, 2019), entitled "An AOI Optical Inspection Station for Circuit Boards for Electric Vehicles," propose a solution based on mobility optimization. This design achieves convenient movement of the inspection station through support legs, equipment housing, cylinders, and transmission mechanisms, solving the problem of difficult handling caused by the large size of traditional equipment. However, this technology focuses on mobility optimization and lacks improvements in inspection accuracy and adaptability to multiple scenarios. Therefore, there is an urgent need to design an AOI optical inspection station for circuit boards to address these issues. Utility Model Content

[0005] The purpose of this invention is to provide an AOI optical inspection stage for circuit boards to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An AOI optical inspection stage for circuit boards includes a housing. An installation area is formed on one outer wall of the housing, and a support component is located inside the installation area. The support component includes a housing, and a tray is mounted inside the housing via bearings. A rotary motor is bolted to one outer wall of the housing, and the output end of the rotary motor is fixedly connected to one side of the tray via a key. The tray includes a frame, and the output end of the rotary motor is connected to the frame via a key. Slide grooves are formed on both sides of the inner wall of the frame, and limit components are slidably connected between the two slide grooves. A left-hand and right-hand lead screw is mounted inside one of the slide grooves via bearings, and the left-hand and right-hand lead screws are connected to the two limit components in a transmission connection. A drive motor is bolted to one outer wall of the frame, and the output end of the drive motor is fixedly connected to one end of the left-hand and right-hand lead screw via a key.

[0008] Furthermore, the limiting component includes a hollow plate, which is threadedly connected to the left and right rotating lead screws, and the outer wall of the top side of the hollow plate is provided with multiple adsorption holes.

[0009] Furthermore, a support plate is welded to one side of the outer wall of the hollow plate, and a vacuum pump is bolted to one side of the outer wall of the support plate. The vacuum pump is connected to the hollow plate through a pipe.

[0010] Furthermore, a support plate is bolted inside the installation area, and a control and power module is bolted to the outer wall of one side of the top of the support plate. A touch screen is bolted to the outer wall of one side of the enclosure, and the touch screen is electrically connected to the control and power module via wires.

[0011] Furthermore, a linear motor is bolted to the center of one side of the bottom of the support plate, and a linear motor is bolted to the output end of the linear motor. A detection module is bolted to the output end of the linear motor. The detection module consists of a CCD camera and a light source.

[0012] Furthermore, a sliding frame is bolted inside the installation area, and a drive motor is bolted to one side of the outer wall of the sliding frame. A transmission screw is mounted on the output end of the drive motor via a flat key, and one end of the transmission screw is mounted on one side of the inner wall of the installation area via a bearing. Two sliding rods are bolted to one side of the outer wall of the sliding frame.

[0013] Furthermore, three connecting plates are bolted to the outer wall of one side of the bottom of the housing, one of which is connected to the transmission screw in a transmission connection, and the other two connecting plates are slidably connected to the outside of the sliding rod.

[0014] In the above technical solution, the AOI optical inspection stage for circuit boards provided by this utility model has the following beneficial effects:

[0015] By operating the rotary motor and housing, the rotary motor drives the tray to rotate with stepless speed, causing the tray to rotate along with the internal circuit board. The circuit board can be adjusted to any detection angle to facilitate AOI optical inspection, avoiding the blind spots of traditional fixed inspection stations, and achieving full-angle coverage inspection of both sides of the circuit board. This improves the device's adaptability to multiple scenarios and provides a more reliable solution for high-density, high-precision circuit board inspection.

[0016] With the help of a drive motor, left and right spiral screws and slide rails, the left and right spiral screws cooperate with the drive motor to drive two limit components to slide towards each other along the slide rails, so as to realize the centered clamping of the circuit board and adapt to the clamping needs of circuit boards of different sizes.

[0017] With the setting of limiting components, the vacuum pump generates negative pressure through the adsorption holes of the hollow plate, adsorbing the edge of the circuit board in a non-contact manner, avoiding scratches or deformation of the board surface caused by mechanical clamping, while suppressing the slight vibration caused by motor transmission.

[0018] This invention solves the bottlenecks of traditional equipment in terms of detection accuracy, efficiency, compatibility and maintainability by using technologies such as rotation adjustment, vacuum adsorption, multi-axis detection and sliding positioning. It is suitable for the full-process automated detection of highly complex PCBs in consumer electronics, automotive electronics and other industries. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of an AOI optical inspection station for circuit boards according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal planar structure of the housing provided in an embodiment of an AOI optical inspection station for circuit boards according to this utility model.

[0022] Figure 3This is a top view schematic diagram of the box structure provided in an embodiment of the AOI optical inspection stage for circuit boards according to this utility model.

[0023] Figure 4 This is a schematic diagram of the supporting component structure provided in an embodiment of an AOI optical inspection stage for circuit boards according to this utility model.

[0024] Figure 5 This is a schematic diagram of the tray structure provided in an embodiment of an AOI optical inspection stage for circuit boards according to this utility model.

[0025] Figure 6 This is a schematic diagram of the limiting component structure provided in an embodiment of an AOI optical inspection stage for circuit boards according to this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Housing; 2. Installation area; 3. Touch screen; 4. Load-bearing components; 5. Support plate; 6. Control and power module; 7. Linear motor one; 8. Linear motor two; 9. Detection module; 10. Sliding frame; 11. Drive screw; 12. Drive motor; 13. Sliding rod; 14. Connecting plate; 15. Housing; 16. Rotary motor; 17. Pallet component; 18. Frame; 19. Slide groove; 20. Limiting components; 21. Drive motor; 22. Left and right helical screws; 23. Hollow plate; 24. Adsorption hole; 25. Support plate; 26. Vacuum pump. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-6 As shown in the figure, an AOI optical inspection stage for circuit boards provided by this utility model includes a housing 1. An installation area 2 is provided on one outer wall of the housing 1, and a support component 4 is provided inside the installation area 2. The support component 4 includes a housing 15. A tray component 17 is installed inside the housing 15 through a bearing. A rotary motor 16 is installed on one outer wall of the housing 15 through bolts, and the output end of the rotary motor 16 is fixedly connected to one side of the tray component 17 through a flat key. The tray component 17 includes a frame 18. The output end of the rotary motor 16 is connected to the frame 18 through a flat key. Slide grooves 19 are provided on both sides of the inner wall of the frame 18, and a limit component 20 is slidably connected between the two slide grooves 19. A left-right rotating screw 22 is installed inside one slide groove 19 through a bearing, and the left-right rotating screw 22 is connected to the two limit components 20 through a transmission connection. A drive motor 21 is installed on one outer wall of the frame 18 through bolts, and the output end of the drive motor 21 is fixedly connected to one end of the left-right rotating screw 22 through a flat key.

[0030] Specifically, in this embodiment, the device includes a housing 1, with an installation area 2 on one outer wall. A support component 4 is located inside the installation area 2. The support component 4 includes a housing 15, with a tray 17 mounted inside the housing 15 via bearings. A rotary motor 16 is bolted to one outer wall of the housing 15. The rotary motor 16 is preferably an STP-43D2170 model. The rotary motor 16 drives the tray 17 to rotate 360°, allowing the circuit board to be adjusted to any detection angle, avoiding blind spots in traditional fixed detection stations. The output end of the rotary motor 16 is fixedly connected to one side of the tray 17 via a flat key. The tray 17 includes a frame 18, with the output end of the rotary motor 16 connected to the frame 18 via a flat key. Openings are located on both sides of the inner wall of the frame 18. A slide groove 19 is provided, which can guide the sliding of the limiting component 20. The limiting component 20 is slidably connected between two slide grooves 19. A left-hand and right-hand screw 22 is installed inside one of the slide grooves 19 through a bearing. The two ends of the left-hand and right-hand screw 22 have opposite thread directions, left-hand and right-hand. The left-hand and right-hand screw 22 are connected to the two limiting components 20 in a transmission connection. A drive motor 21 is bolted to one side of the outer wall of the frame 18. The drive motor 21 is preferably model SST59D5305. The left-hand and right-hand screw 22 cooperate with the drive motor 21 to drive the two limiting components 20 to slide in opposite directions along the slide groove 19, so as to realize the circuit board is centered and clamped, which can be adapted to different sizes. The output end of the drive motor 21 is fixedly connected to one end of the left-hand and right-hand screw 22 through a flat key.

[0031] This utility model provides an AOI optical inspection stage for circuit boards. When the rotary motor 16 is started, it drives the tray 17 to rotate with stepless speed, so that the tray 17 carries the circuit board inside it and can be rotated. The circuit board can be adjusted to any inspection angle to facilitate AOI optical inspection, avoid the blind spots of traditional fixed inspection stages, realize full-angle coverage inspection of the front and back of the circuit board, improve the multi-scene adaptability of the device, and provide a more reliable solution for high-density, high-precision circuit board inspection.

[0032] In one embodiment provided by this utility model, such as Figure 6 As shown, the limiting component 20 includes a hollow plate 23, which is threadedly connected to the left and right rotating screws 22. Multiple adsorption holes 24 are provided on the outer wall of one side of the top of the hollow plate 23. A support plate 25 is welded to the outer wall of one side of the hollow plate 23, and a vacuum pump 26 is bolted to the outer wall of one side of the support plate 25. The vacuum pump 26 is preferably an HP-0300V oil-free silent vacuum pump. After the vacuum pump 26 is started, a negative pressure is formed inside the hollow plate 23 connected by a pipe. The adsorption holes 24 generate an adjustable adsorption force of 0~-80kPa (-60kPa is commonly used for rigid PCBs and -30kPa for flexible FPCs), ensuring that the circuit board is flat and fixed. The vacuum pump 26 is connected to the hollow plate 23 through a pipe.

[0033] In another embodiment provided by this utility model, such as Figure 2 As shown, a support plate 5 is bolted to the interior of installation area 2, and a control and power module 6 is bolted to the outer wall of one side of the top of support plate 5. The control and power module 6 integrates a multi-axis motion controller supporting the EtherCAT protocol, synchronously coordinating the actions of rotary motor 16, linear motor 1 7, linear motor 2 8, and drive motor 12 with a timing error of <1ms, achieving automatic grid / spiral scanning of the detection path. A touch screen 3 is bolted to the outer wall of one side of the housing 1. The touch screen 3 displays the detection images and defect data in real time, and has a built-in industrial control computer CPU i7-12700H running algorithms with a response time of <0.1s. It supports exporting detection reports containing defect coordinates, types, and confidence levels. The touch screen 3 is electrically connected to the control and power module 6 via wires. A linear motor 7 is bolted to the center of one side of the bottom of the support plate 5. A linear motor 8 is mounted to the output end of the linear motor 7 via a flat key. A detection module 9 is bolted to the output end of the linear motor 8. The detection module 9 consists of a CCD camera and a light source. The ring LED light source (color temperature 5000K±5%, illuminance 1000 lux at 45°) of the detection module 9 illuminates the circuit board at an incident angle to eliminate interference from solder joint reflections. The CCD camera has a resolution of 2448×2048 and a frame rate of 30fps, and is equipped with a 10×~50× optical lens. It can acquire surface images and identify defects as small as 20μm.

[0034] In another embodiment provided by this utility model, such as Figure 2-3 As shown, a sliding frame 10 is bolted inside the installation area 2, and a drive motor 12 is bolted to one side of the outer wall of the sliding frame 10. The drive motor 12 is preferably an STP-43D2170. A transmission screw 11 is mounted on the output end of the drive motor 12 via a flat key, and one end of the transmission screw 11 is mounted on one side of the inner wall of the installation area 2 via a bearing. Two sliding rods 13 are bolted to one side of the outer wall of the sliding frame 10. When the drive motor 12 drives the transmission screw 11 to move, it will move one of the connecting plates 14. Due to the sliding guide between the other two connecting plates 14 and the sliding rods 13, the bearing assembly 4 will move horizontally inside the installation area 2 to facilitate detection by the moving detection module 9. Three connecting plates 14 are bolted to one side of the outer wall of the bottom of the housing 15, and one of the connecting plates 14 is connected to the transmission screw 11 in a transmission connection. The other two connecting plates 14 are slidably connected to the outside of the sliding rods 13. Example

[0035] An AOI optical inspection stage for circuit boards includes a housing 1. A mounting area 2 is formed on one outer wall of the housing 1, and a support component 4 is located inside the mounting area 2. The support component 4 includes a housing 15, and a tray 17 is mounted inside the housing 15 via bearings. A rotary motor 16 is bolted to one outer wall of the housing 15. The rotary motor 16 is preferably an STP-43D2170 model. The rotary motor 16 drives the tray 17 to rotate 360°, allowing the circuit board to be adjusted to any inspection angle, avoiding blind spots in traditional fixed inspection stages. The output end of the rotary motor 16 is fixedly connected to one side of the tray 17 via a flat key. The tray 17 includes a frame 18, and the output end of the rotary motor 16 is connected to the frame 18 via a flat key. The inner walls of the frame 18 are... Each component is provided with a sliding groove 19, which guides the sliding of the limiting component 20. The limiting component 20 is slidably connected between the two sliding grooves 19. A left-hand and right-hand screw 22 is installed inside one of the sliding grooves 19 through a bearing. The two ends of the left-hand and right-hand screw 22 have opposite thread directions, left-hand and right-hand. The left-hand and right-hand screw 22 are connected to the two limiting components 20 in a transmission connection. A drive motor 21 is bolted to one side of the outer wall of the frame 18. The drive motor 21 is preferably model SST59D5305. The left-hand and right-hand screw 22 cooperate with the drive motor 21 to drive the two limiting components 20 to slide in opposite directions along the sliding groove 19, so as to realize the centered clamping of the circuit board and adapt to different sizes. The output end of the drive motor 21 is fixedly connected to one end of the left-hand and right-hand screw 22 through a flat key. Example

[0036] This embodiment further defines the features of Embodiment 1. The limiting component 20 includes a hollow plate 23, which is threadedly connected to the left and right rotating lead screws 22. Multiple adsorption holes 24 are formed on the outer wall of one side of the top of the hollow plate 23. A support plate 25 is welded to the outer wall of one side of the hollow plate 23, and a vacuum pump 26 is bolted to the outer wall of one side of the support plate 25. The vacuum pump 26 is preferably an HP-0300V oil-free silent vacuum pump. After the vacuum pump 26 is started, a negative pressure is formed inside the hollow plate 23, which is connected by a pipe. The adsorption holes 24 generate an adjustable adsorption force of 0~-80kPa (-60kPa is commonly used for rigid PCBs, and -30kPa for flexible FPCs), ensuring the electrical... The road surface is flat and fixed. The vacuum pump 26 is connected to the hollow plate 23 through a pipe. The support plate 5 is installed inside the installation area 2 by bolts, and the control and power module 6 is installed on the outer wall of the top side of the support plate 5 by bolts. The control and power module 6 integrates a multi-axis motion controller that supports the EtherCAT protocol and synchronously coordinates the actions of the rotary motor 16, linear motor 1 7, linear motor 2 8, and drive motor 12. The timing error is <1ms, realizing automatic planning of the detection path for grid / spiral scanning. The outer wall of one side of the box 1 is installed with a touch screen 3 by bolts. The touch screen 3 displays the detection image and defect data in real time. It has a built-in industrial control computer CPU i7-12700H running the algorithm with a response time of <0.The system supports exporting inspection reports containing defect coordinates, types, and confidence levels. The touchscreen 3 is electrically connected to the control and power module 6 via wires. A linear motor 7 is bolted to the center of one side of the bottom of the support plate 5. A linear motor 8 is mounted to the output of linear motor 7 via a flat key. A detection module 9 is bolted to the output of linear motor 8. The detection module 9 consists of a CCD camera and a light source. The ring-shaped LED light source (color temperature 5000K±5%, illuminance 1000 lux at 45°) illuminates the circuit board at an incident angle to eliminate solder joint reflection interference. The CCD camera has a resolution of 2448×2048, a frame rate of 30fps, and a 10×~50× optical lens, capturing surface images with a minimum defect size of 20μm. A sliding frame 10 is bolted inside the mounting area 2. A drive motor 12, preferably an STP-43D2170, is bolted to one side of the outer wall. A transmission screw 11 is mounted to the output end of the drive motor 12 via a key, and one end of the transmission screw 11 is mounted to the inner wall of the mounting area 2 via a bearing. Two sliding rods 13 are bolted to one side of the outer wall of the sliding frame 10. When the drive motor 12 drives the transmission screw 11, it moves one of the connecting plates 14. Due to the sliding guidance between the other two connecting plates 14 and the sliding rods 13, the bearing assembly 4 moves horizontally within the mounting area 2 to facilitate detection by the moving detection module 9. Three connecting plates 14 are bolted to one side of the outer wall of the bottom of the housing 15. One of the connecting plates 14 is connected to the transmission screw 11 in a transmission manner, while the other two connecting plates 14 are slidably connected to the outside of the sliding rods 13.

[0037] Working principle: When using this device, the following steps can be performed:

[0038] I. Circuit Board Fixing and Size Adjustment

[0039] Vacuum adsorption fixation: The circuit board is placed on the hollow plate 23 of the limiting component 20. After the vacuum pump 26 is started, a negative pressure is formed inside the hollow plate 23 connected by the pipe. The adsorption holes 24 generate adjustable adsorption force to ensure that the circuit board is flat and fixed.

[0040] Bidirectional clamping adjustment: The drive motor 21 drives the left and right screws 22 to rotate. Because the threads at both ends of the screws are in opposite directions, left and right, the limit components 20 on both sides slide in opposite directions along the slide groove 19 to adapt to the limit of circuit boards of different sizes.

[0041] II. Multi-degree-of-freedom motion control

[0042] Rotation of bearing component 4: Rotary motor 16 drives the frame 18 of tray component 17 to rotate via flat key, realizing ±180° angle flipping of circuit board, and working with detection module 9 to complete multi-angle imaging of front and back and side solder joints;

[0043] Detection module 9 three-dimensional motion: Linear motor 1 7 drives detection module 9 to move left and right in the horizontal direction, and linear motor 2 8 controls detection module 9 to move back and forth in the horizontal direction;

[0044] Translational compensation of sliding frame 10: drive motor 12 drives transmission screw 11 to rotate, and pushes bearing component 4 to move horizontally along sliding rod 13 through connecting plate 14.

[0045] III. Optical Imaging and Defect Identification

[0046] Light source and image acquisition: The ring-shaped LED light source of the detection module 9 illuminates the circuit board at a 45° incident angle to eliminate interference from solder joint reflections; the CCD camera of the detection module 9 acquires surface images and displays the detection results through the touch screen 3.

[0047] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An AOI optical inspection stage for circuit boards, comprising a housing (1), characterized in that, The outer wall of one side of the box (1) is provided with an installation area (2), and the installation area (2) is provided with a load-bearing component (4). The bearing component (4) includes a housing (15), inside which a tray component (17) is installed via bearings. A rotary motor (16) is installed on one side of the outer wall of the housing (15) via bolts, and the output end of the rotary motor (16) is fixedly connected to one side of the tray component (17) via a flat key. The tray component (17) includes a frame (18), and the output end of the rotary motor (16) is connected to the frame (18) via a flat key. Slide grooves (19) are provided on both sides of the inner wall of the frame (18), and a limit component (20) is slidably connected between the two slide grooves (19). A left-right helical screw (22) is installed inside one of the slide grooves (19) via bearings, and the left-right helical screw (22) is connected to the two limit components (20) in a transmission manner. A drive motor (21) is bolted to one side of the outer wall of the frame (18), and the output end of the drive motor (21) is fixedly connected to one end of the left and right screw rod (22) via a flat key.

2. The AOI optical inspection stage for circuit boards according to claim 1, characterized in that, The limiting component (20) includes a hollow plate (23), which is threadedly connected to the left and right rotating screws (22), and the hollow plate (23) has multiple adsorption holes (24) on the outer wall of one side of the top.

3. The AOI optical inspection stage for circuit boards according to claim 2, characterized in that, A support plate (25) is welded to one side of the outer wall of the hollow plate (23), and a vacuum pump (26) is installed on one side of the outer wall of the support plate (25) by bolts. The vacuum pump (26) is connected to the hollow plate (23) by pipes.

4. The AOI optical inspection stage for circuit boards according to claim 1, characterized in that, The installation area (2) is fitted with a support plate (5) by bolts, and a control and power module (6) is fitted with bolts on one side of the top of the support plate (5). A touch screen (3) is fitted with bolts on one side of the outer wall of the housing (1), and the touch screen (3) is electrically connected to the control and power module (6) by wires.

5. The AOI optical inspection stage for circuit boards according to claim 4, characterized in that, Linear motor 1 (7) is bolted to the center of one side of the bottom of the support plate (5), and linear motor 2 (8) is bolted to the output end of linear motor 1 (7). Detection module (9) is bolted to the output end of linear motor 2 (8). Detection module (9) consists of a CCD camera and a light source.

6. The AOI optical inspection stage for circuit boards according to claim 1, characterized in that, The installation area (2) is equipped with a sliding frame (10) by bolts, and a drive motor (12) is installed on one side of the outer wall of the sliding frame (10) by bolts. The output end of the drive motor (12) is equipped with a transmission screw (11) via a flat key, and one end of the transmission screw (11) is mounted on one side of the inner wall of the installation area (2) via a bearing. Two sliding rods (13) are bolted to the outer wall of one side of the sliding frame (10).

7. The AOI optical inspection stage for circuit boards according to claim 6, characterized in that, Three connecting plates (14) are bolted to the outer wall of one side of the bottom of the housing (15), and one of the connecting plates (14) is connected to the transmission screw (11) in a transmission connection, while the other two connecting plates (14) are slidably connected to the outside of the sliding rod (13).

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