An overall device for high-precision AOI online detection of a liquid crystal display screen

Abstract

The present invention discloses a high-precision AOI online detection integrated device for liquid crystal display screens, which relates to the technical field of online detection of liquid crystal display screens. It includes a machine body. Support feet are fixedly installed at the bottom of the machine body. A detection device is fixedly installed at the top of the inner wall of the machine body. A conveying wheel is rotatably installed at the bottom of the inner wall of the machine body. A motor is fixedly installed at the bottom of the inner wall of the machine body. The output end of the motor is fixedly installed with the conveying wheel. The conveying wheels are connected by a transmission belt. A flattening device is arranged at the bottom of the inner wall of the machine body. A cleaning device is arranged at the bottom of the inner wall of the machine body. A buffer device is arranged at the bottom of the inner wall of the machine body. The flattening device includes a first gear, a rotating column, a second gear, a cylinder, a collar and a stop rod. By sliding the sliding rod to push the push plate to start moving, the display screen is positioned in the middle of the conveying wheel, ensuring that the measuring instrument is within the best measurement range and improving the overall efficiency of detection.

Description

Technical Field

[0001] The present invention relates to the technical field of on-line detection of liquid crystal display screens, and specifically relates to a high-precision AOI on-line detection integrated device for liquid crystal display screens. Background Art

[0002] The high-precision automatic optical inspection (AOI) on-line inspection device for liquid crystal display screens (LCDs) is a device dedicated to detecting each link in the manufacturing process of liquid crystal display screens, mainly used to ensure product quality and production efficiency. Through a high-precision camera system, AOI can measure the size, gap, etc. of the display screen to ensure that the product meets the design specifications.

[0003] The patent with the patent announcement number CN114608454A relates to the technical field of on-line detection of liquid crystal display screens. The high-precision AOI on-line detection integrated device of this invention includes a machine table, an X-axis linear module and a PCB board Y-axis moving and positioning module installed on the machine table. The X-axis linear module is connected with an AOI component, and the PCB board Y-axis moving and positioning module is provided with a PCB board, and the PCB board is located below the AOI component for detection. This invention is mainly used for the detection of the size and surface roughness of the PCB board, and has the advantages of high precision, high efficiency, and being able to perform on-line detection.

[0004] In the above-mentioned invention, the PCB board is provided by the PCB board Y-axis moving and positioning module, and the PCB board is located below the AOI component for detection. This invention is mainly used for the detection of the size and surface roughness of the PCB board, and has the advantages of high precision, high efficiency, and being able to perform on-line detection. However, when detecting the display screen, if the position of the display screen is deviated, it may cause detection errors or failures. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-precision AOI on-line detection integrated device for liquid crystal display screens, which solves the problems raised in the above background art.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A high-precision AOI on-line detection integrated device for liquid crystal display screens includes a machine body. Support feet are fixedly installed at the bottom of the machine body. A detection device is fixedly installed at the top of the inner wall of the machine body. Conveyor wheels are rotatably installed at the bottom of the inner wall of the machine body. A motor is fixedly installed at the bottom of the inner wall of the machine body, and the output end of the motor is fixedly installed with a conveyor wheel. The conveyor wheels are connected by a transmission belt. A flattening device is arranged at the bottom of the inner wall of the machine body. A cleaning device is arranged at the bottom of the inner wall of the machine body. A buffer device is arranged at the bottom of the inner wall of the machine body;

[0007] The gear train is a gear that is fixedly mounted on one end of the transmission wheel, the gear train is rotatably mounted on the bottom of the body inner wall, the gear train is fixedly mounted on the circumferential surface of the transmission wheel, the cylinder is fixedly mounted on the top of the transmission wheel, the ring is slidably mounted on the top of the transmission wheel, the sliding rod is fixedly mounted on the right side of the ring, the pushing plate is fixedly mounted on the end of the sliding rod away from the ring, the sliding column slides through the pushing plate, the baffle is fixedly mounted on the back of the pushing plate, the motor drives the conveying wheel to start rotating, the conveying wheel rotates through the transmission belt to drive the other conveying wheels to start rotating, the conveying wheel rotates to drive the gear train to start rotating, the gear train rotates to drive the gear train to start rotating, the gear train rotates to drive the gear train to start rotating, the gear train rotates to drive the rotating column to start rotating, and the rotating column rotates to drive the cylinder to start rotating.

[0008] According to the above technical solution, gear one is meshed with gear two, and spring one is arranged between the push plate and the baffle. The meshing of gear one and gear two ensures that gear one can drive gear two to rotate together when rotating, and the setting of spring one ensures that the baffle can achieve autonomous reset.

[0009] According to the above technical solution, the cleaning device includes a push rod, a support frame, an elastic telescopic rod, a cleaning rod and an inclined plane block. The push rod is fixedly mounted on the top of the sliding rod, the support frame is fixedly mounted on the bottom of the inner wall of the machine body, the elastic telescopic rod is fixedly mounted on the bottom of the support frame, the cleaning rod is fixedly mounted on the movable end of the elastic telescopic rod, and the inclined plane block is fixedly mounted on the front of the cleaning rod. The movement of the push rod pushes the inclined plane block to start moving, and the movement of the inclined plane block drives the cleaning rod to start moving. The cleaning rod moves and contacts the display on the conveying wheel.

[0010] According to the above technical solution, the cleaning device also includes a storage tank, a water pipe, a valve, a swivel, a protrusion, two rotating rods 1, a belt 1, two push blocks 1 and a push block 2. The storage tank is fixedly installed on the top of the support frame, the water pipe is fixedly installed on the bottom of the storage tank, the valve is fixedly installed on the circumferential surface of the water pipe, the swivel is fixedly installed on the control end of the valve, the protrusion is fixedly installed on the circumferential surface of the swivel, the two rotating rods 1 are connected by a belt 1 transmission, the two push blocks 1 are fixedly installed on the back of the belt 1, and the push block 2 is fixedly installed on the front of the belt 1. The movement of the push block 2 drives the belt to start rotating around the two rotating rods 1, the rotation of the belt 1 drives the push block to start moving, the movement of the push block 1 drives the protrusion to start moving, and the movement of the protrusion drives the swivel to start rotating.

[0011] According to the above technical solution, the side where the push rod 1 and the inclined surface block 1 contact each other is set as an inclined surface, and a spring 2 is provided between the push block 1 and the valve. The inclined surface is provided to ensure that the push rod 1 can smoothly push the inclined surface block 1, and the spring 2 is provided to ensure that the push block 1 can achieve autonomous reset.

[0012] According to the above technical solution, the buffer device includes a push rod 2, a sloped rod, a slide plate, two sloped blocks 2, a flap and a stopper, the push rod 2 is fixedly installed on the back of the cleaning rod, the sloped rod is slidably installed on the bottom of the inner wall of the machine body, the slide plate is slidably installed on the bottom of the inner wall of the machine body, the two sloped blocks 2 are fixedly installed on the top of the slide plate, the flap plate is rotatably installed between the two sloped blocks 2, and the stopper is fixedly installed on the bottom of the inner wall of the machine body. When the push rod 2 starts to move, it pushes the sloped rod to start moving. When the sloped rod moves, it pushes the sloped block 2 to start moving. When the sloped block 2 moves, it drives the slide plate to start moving. When the slide plate moves, it drives the flap plate to start moving.

[0013] According to the above technical scheme, the buffer device also includes two rotating rods 2, a belt 2, a fixed rod, a buffer plate and a connecting rod. The two rotating rods 2 are rotatably installed at the bottom of the inner wall of the machine body, and the two rotating rods 2 are connected through a belt 2 transmission. One end of the fixed rod is fixedly installed on the back of the skateboard, and the other end of the fixed rod is fixedly installed on the front of the belt 2. The buffer plate is slidably installed at the bottom of the inner wall of the machine body. One end of the connecting rod is fixedly installed on the back of the belt 2, and the other end of the connecting rod is fixedly installed on the left side of the buffer plate. When the skateboard moves, it drives the fixed rod to start moving. The movement of the fixed rod drives the belt 2 to start rotating around the two rotating rods 2. The rotation of the belt 2 drives the connecting rod to start moving. The movement of the connecting rod drives the buffer plate to start moving.

[0014] According to the above technical solution, the side of the push rod 2 that contacts the inclined plane rod is set as an inclined plane, the side of the inclined plane rod that contacts the inclined plane block 2 is set as an inclined plane, and a spring 3 is arranged between the slide plate and the bottom of the inner wall of the machine body. By setting the inclined plane, it is ensured that the push rod 2 can smoothly push the inclined plane rod, and by setting the inclined plane, it is ensured that the inclined plane rod can smoothly push the inclined plane block 2. By setting the spring 3, it is ensured that the slide plate can achieve autonomous reset.

[0015] The present invention provides a high-precision AOI online detection integrated device for liquid crystal display screens. It has the following beneficial effects:

[0016] (1)In this invention, by sliding the sliding rod, the pushing plate is driven to start moving. The movement of the pushing plates at both ends will push the display screen located on the conveying wheels, so that the display screen is positioned in the middle of the conveying wheels, ensuring that the measuring instrument is within the optimal measurement range, thereby improving the accuracy and consistency of measurement, enhancing the overall efficiency of detection. By moving the blocking rod to block a corner of the display, the display adjusts its own state during transportation, ensuring that the display can quickly move to the required position, saving the time of manual adjustment, improving the overall efficiency of detection, and preventing the detection from failing due to the display being in a position or state that the detection device cannot detect.

[0017] (2)In this invention, by moving the first inclined block, the cleaning rod is driven to start moving. The moving cleaning rod comes into contact with the display screen on the conveying wheels, ensuring that impurities such as dust, fingerprints, and oil stains on the surface of the display can be effectively removed, keeping the display clean and ensuring that the image is clearly visible. By rotating the rotating ring to open the valve, the cleaning agent stored inside the storage tank flows out through the water pipe and is sprayed on the surface of the cleaning rod, ensuring that the cleaning rod can significantly improve visibility and color reproduction when cleaning the display screen, reducing reflection and blurring, and thus improving the viewing experience.

[0018] (3)In this invention, by moving the flap, the display is driven to move together, ensuring that the display can be smoothly and safely transported to the next link during transportation, reducing the physical damage to the display and lowering the risk of breakage. When the flap moves and contacts the stop block, it starts to rotate and tilt to ensure that the display can slide off the flap, reducing direct contact with other objects, preventing the display from failing to move in time and colliding and rubbing against the next display. By moving the rod, the buffer plate is driven to start moving. The moving buffer plate restricts the sliding area of the display, ensuring that the display slides from the flap to a safe area, effectively reducing the risk of accidental collision and impact, and preventing the display from sliding to a dangerous area and being damaged due to collision. Description of the Drawings

[0019] Figure 1 Schematic diagram of the overall structure of the present invention;

[0020] Figure 2 Cross-sectional schematic diagram of the overall structure of the present invention;

[0021] Figure 3 Cross-sectional schematic diagram of the cleaning device and buffer device of the present invention;

[0022] Figure 4 Cross-sectional schematic diagram of the leveling device of the present invention;

[0023] Figure 5 Cross-sectional schematic diagram of the first gear and the second gear of the present invention;

[0024] Figure 6 Cross-sectional schematic diagram of the cleaning device of the present invention;

[0025] Figure 7 This is a sectional view schematic diagram of the valve and swivel structure of the present invention;

[0026] Figure 8 This is a sectional view schematic diagram of the buffer device structure of the present invention.

[0027] In the figure: 1, body; 2, support feet; 3, detection equipment; 4, conveyor wheels; 5, motor; 6, transmission belt; 7, gear one; 8, rotating column; 9, gear two; 10, cylinder; 11, collar; 12, sliding rod; 13, push plate; 14, sliding column; 15, baffle; 16, stop bar; 171, push rod one; 172, support frame; 173, elastic telescopic rod; 174, cleaning rod; 175, inclined block one; 176, storage tank; 177, water pipe; 178, valve; 179, swivel; 1710, convex block; 1711, rotating rod one; 1712, belt one; 1713, push block one; 1714, push block two; 181, push rod two; 182, inclined plane rod; 183, sliding plate; 184, inclined block two; 185, flap; 186, stop block; 187, rotating rod two; 188, belt two; 189, fixed rod; 1810, buffer plate; 1811, connecting rod. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1 - 8 , an embodiment of the present invention is: A high-precision AOI online detection integrated device for liquid crystal displays includes a body 1, support feet 2 are fixedly installed at the bottom of the body 1, detection equipment 3 is fixedly installed at the top of the inner wall of the body 1, conveyor wheels 4 are rotatably installed at the bottom of the inner wall of the body 1, a motor 5 is fixedly installed at the bottom of the inner wall of the body 1, the output end of the motor 5 is fixedly installed with the conveyor wheels 4, the conveyor wheels 4 are connected by a transmission belt 6, and a flattening device is arranged at the bottom of the inner wall of the body 1;

[0030] Among them, the leveling device includes a first gear 7, a rotating column 8, a second gear 9, a cylinder 10, a collar 11, a sliding rod 12, a push plate 13, a sliding column 14, a baffle 15 and a stop rod 16. The first gear 7 is fixedly installed at one end of the conveying wheel 4 close to the motor 5. The rotating column 8 is rotatably installed at the bottom of the inner wall of the machine body 1. The second gear 9 is fixedly installed on the circumferential surface of the rotating column 8. The cylinder 10 is fixedly installed on the top of the rotating column 8. The collar 11 is slidably installed on the top of the rotating column 8. The sliding rod 12 is fixedly installed on the right side of the collar 11. The push plate 13 is fixedly installed at one end of the sliding rod 12 away from the collar 11. The sliding column 14 slidably penetrates the push plate 13. The baffle 15 is fixedly installed at one end of the sliding column 14 away from the push plate 13. The stop rod 16 is fixedly installed on the back of the push plate 13. By sliding the sliding rod 12, the push plate 13 is pushed to start moving. The push plates 13 at both ends move to push the display screen on the conveying wheel 4, so that the display screen is located at the middle position of the conveying wheel 4, ensuring that the measuring instrument is within the best measuring range, thereby improving the accuracy and consistency of the measurement and improving the overall efficiency of the detection.

[0031] The first gear 7 meshes with the second gear 9. A first spring is arranged between the push plate 13 and the baffle 15. By the meshing of the first gear 7 and the second gear 9, it is ensured that the first gear 7 can drive the second gear 9 to rotate together when the first gear 7 rotates. By setting the first spring, it is ensured that the baffle 15 can achieve self-resetting.

[0032] When this embodiment works: When the display screen reaches the top of the conveying wheel 4 inside the machine body 1, the motor 5 is started, so that the motor 5 drives the conveying wheel 4 to start rotating. The rotation of the conveying wheel 4 drives the other conveying wheels 4 to start rotating through the transmission belt 6. The rotation of the conveying wheel 4 drives the first gear 7 to start rotating. The rotation of the first gear 7 drives the second gear 9 to start rotating. The rotation of the second gear 9 drives the rotating column 8 to start rotating. The rotation of the rotating column 8 drives the cylinder 10 to start rotating. The rotation of the cylinder 10 drives the collar 11 to start sliding. The sliding of the collar 11 drives the sliding rod 12 to start sliding. The sliding of the sliding rod 12 pushes the push plate 13 to start moving. The movement of the push plates 13 at both ends will push the display screen on the conveying wheel 4, so that the display screen is located at the middle position of the conveying wheel 4, ensuring that the measuring instrument is within the best measuring range, thereby improving the accuracy and consistency of the measurement and improving the overall efficiency of the detection; When the push plate 13 moves, it drives the sliding column 14 to start moving. The movement of the sliding column 14 drives the baffle 15 to start moving. When the baffle 15 moves, if the display is in an inclined state, the baffle 15 pushes the sliding column 14 in the reverse direction. At this time, the push plate 13 drives the stop rod 16 to start moving. The movement of the stop rod 16 blocks a corner of the display, so that the display adjusts its own state during transportation, ensuring that the display can quickly move to the required position, saving the time of manual adjustment, improving the overall efficiency of the detection, and preventing the detection from failing due to the display being in a position or state that cannot be detected by the detection device 3.

[0033] Please refer to Figures 1 - 8, on the basis of the above embodiments, in another embodiment of the present invention, a cleaning device is provided at the bottom of the inner wall of the body 1, and a buffer device is provided at the bottom of the inner wall of the body 1. The cleaning device includes a first push rod 171, a support frame 172, an elastic telescopic rod 173, a cleaning rod 174 and a first inclined block 175. The first push rod 171 is fixedly installed at the top of the sliding rod 12, the support frame 172 is fixedly installed at the bottom of the inner wall of the body 1, the elastic telescopic rod 173 is fixedly installed at the bottom of the support frame 172, the cleaning rod 174 is fixedly installed at the movable end of the elastic telescopic rod 173, and the first inclined block 175 is fixedly installed at the front of the cleaning rod 174. The movement of the first inclined block 175 drives the cleaning rod 174 to start moving, and the cleaning rod 174 moves into contact with the display on the conveying wheel 4 to ensure that impurities such as dust, fingerprints, and oil stains on the surface of the display can be effectively removed, keeping the display clean and ensuring that the image is clearly visible.

[0034] The cleaning device further includes a storage tank 176, a water pipe 177, a valve 178, a rotating ring 179, a convex block 1710, two first rotating rods 1711, a first belt 1712, two first pushing blocks 1713 and a second pushing block 1714. The storage tank 176 is fixedly installed at the top of the support frame 172, the water pipe 177 is fixedly installed at the bottom of the storage tank 176, the valve 178 is fixedly installed on the circumferential surface of the water pipe 177, the rotating ring 179 is fixedly installed at the control end of the valve 178, the convex block 1710 is fixedly installed on the circumferential surface of the rotating ring 179, the two first rotating rods 1711 are connected by the first belt 1712, the two first pushing blocks 1713 are fixedly installed on the back of the first belt 1712, and the second pushing block 1714 is fixedly installed on the front of the first belt 1712. The rotation of the rotating ring 179 opens the valve 178, so that the cleaning agent stored inside the storage tank 176 flows out through the water pipe 177 and is sprayed on the surface of the cleaning rod 174, ensuring that the cleaning rod 174 can significantly improve visibility and color reproduction when cleaning the display screen, reducing reflection and blurring, thereby improving the viewing experience.

[0035] The surface of the first push rod 171 in contact with the first inclined block 175 is set as an inclined surface, and a second spring is provided between the first pushing block 1713 and the valve 178. By setting the inclined surface, it is ensured that the first push rod 171 can smoothly push the first inclined block 175, and by setting the second spring, it is ensured that the first pushing block 1713 can achieve self-resetting.

[0036] The buffer device includes a push rod 181, a sloped rod 182, a slide plate 183, two sloped blocks 184, a flap 185 and a stopper 186. The push rod 181 is fixedly installed on the back of the cleaning rod 174, the sloped rod 182 is slidably installed on the bottom of the inner wall of the body 1, the slide plate 183 is slidably installed on the bottom of the inner wall of the body 1, the two sloped blocks 184 are fixedly installed on the top of the slide plate 183, the flap 185 is rotatably installed between the two sloped blocks 184, and the stopper 186 is fixedly installed on the bottom of the inner wall of the body 1. The display is moved together with the movement of the flap 185 to ensure that the display can be smoothly and safely transferred to the next link during the transportation process, reducing physical damage to the display and reducing the risk of breakage.

[0037] The buffer device also includes two rotating rods 187, a belt 188, a fixed rod 189, a buffer plate 1810 and a connecting rod 1811. The two rotating rods 187 are rotatably installed at the bottom of the inner wall of the body 1, and the two rotating rods 187 are connected through the belt 188. One end of the fixed rod 189 is fixedly installed on the back of the slide plate 183, and the other end of the fixed rod 189 is fixedly installed on the front of the belt 188. The buffer plate 1810 is slidably installed at the bottom of the inner wall of the body 1, one end of the connecting rod 1811 is fixedly installed on the back of the belt 188, and the other end of the connecting rod 1811 is fixedly installed on the left side of the buffer plate 1810. The movement of the rod 1811 drives the buffer plate 1810 to start moving. The movement of the buffer plate 1810 limits the sliding area of ​​the display, ensuring that the display slides from the flip plate 185 to the safe area, effectively reducing the risk of accidental collision and impact, and preventing the display from sliding to the dangerous area and colliding and causing damage.

[0038] The side where the push rod 181 contacts the inclined plane rod 182 is set as an inclined plane, the side where the inclined plane rod 182 contacts the inclined plane block 184 is set as an inclined plane, and a spring 3 is set between the slide plate 183 and the bottom of the inner wall of the body 1. The inclined plane is set to ensure that the push rod 181 can smoothly push the inclined plane rod 182, the inclined plane is set to ensure that the inclined plane rod 182 can smoothly push the inclined plane block 184, and the spring 3 is set to ensure that the slide plate 183 can achieve self-reset.

[0039] During the operation of this embodiment: while the sliding rod 12 slides, it drives the first push rod 171 to start moving. The movement of the first push rod 171 pushes the first inclined block 175 to start moving. The movement of the first inclined block 175 drives the cleaning rod 174 to start moving. The cleaning rod 174 moves into contact with the display on the conveying wheel 4 to ensure that dust, fingerprints, oil stains and other impurities on the surface of the display can be effectively removed, keeping the display clean and ensuring that the image is clearly visible. When the cleaning rod 174 moves, it will push the second push block 1714 to start moving. The movement of the second push block 1714 drives the first belt 1712 to start rotating around the two first rotating rods 1711. The rotation of the first belt 1712 drives the first push block 1713 to start moving. The movement of the first push block 1713 drives the convex block 1710 to start moving. The movement of the convex block 1710 drives the rotating ring 179 to start rotating. The rotation of the rotating ring 179 opens the valve 178, so that the cleaning agent stored inside the storage tank 176 flows out through the water pipe 177 and is sprayed on the surface of the cleaning rod 174, ensuring that the cleaning rod 174 can significantly improve visibility and color reproduction when cleaning the display screen, reduce reflection and blur, thereby improving the viewing experience, especially in bright environments.

[0040] When the display moves to the top of the flap 185, while the cleaning rod 174 moves, it drives the second push rod 181 to start moving. The start of the movement of the second push rod 181 pushes the inclined rod 182 to start moving. The movement of the inclined rod 182 pushes the second inclined block 184 to start moving. The movement of the second inclined block 184 drives the sliding plate 183 to start moving. The movement of the sliding plate 183 drives the flap 185 to start moving. The movement of the flap 185 drives the display to move together, ensuring that the display can be smoothly and safely transferred to the next link during the conveying process, reducing the physical damage to the display and lowering the risk of breakage. When the flap 185 moves and contacts the stop block 186, it starts to rotate and tilt to ensure that the display can slide off the flap 185 and reduce direct contact with other objects, preventing the display from failing to move in time and colliding and scratching with the next display. When the sliding plate 183 moves, it drives the fixed rod 189 to start moving. The movement of the fixed rod 189 drives the second belt 188 to start rotating around the two second rotating rods 187. The rotation of the second belt 188 drives the connecting rod 1811 to start moving. The movement of the connecting rod 1811 drives the buffer plate 1810 to start moving. The movement of the buffer plate 1810 limits the sliding area of the display, ensuring that the display slides from the flap 185 to the safe area, effectively reducing the risk of accidental collision and impact, and preventing the display from sliding to the dangerous area and causing damage due to collision.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill 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. An overall device for high-precision AOI online detection of a liquid crystal display screen, comprising a machine body, characterized in that: The bottom of the body is fixedly installed with support feet, the top of the inner wall of the body is fixedly installed with detection equipment, the bottom of the inner wall of the body is rotatably installed with a conveying wheel, the bottom of the inner wall of the body is fixedly installed with a motor, the output end of the motor is fixedly installed with a conveying wheel, the conveying wheels are connected by a transmission belt, a leveling device is arranged at the bottom of the inner wall of the body, a cleaning device is arranged at the bottom of the inner wall of the body, and a buffer device is arranged at the bottom of the inner wall of the body; Among them, the leveling device includes a first gear, a rotating column, a second gear, a cylinder, a collar, a sliding rod, a pushing plate, a sliding column, a baffle and a blocking rod. The first gear is fixedly installed at one end of the conveying wheel close to the motor. The rotating column is rotatably installed at the bottom of the inner wall of the body. The second gear is fixedly installed on the circumferential surface of the rotating column. The cylinder is fixedly installed at the top of the rotating column. The collar is slidably installed at the top of the rotating column. The sliding rod is fixedly installed on the right side of the collar. The pushing plate is fixedly installed at one end of the sliding rod away from the collar. The sliding column slidably penetrates through the pushing plate. The baffle is fixedly installed at one end of the sliding column away from the pushing plate. The blocking rod is fixedly installed on the back of the pushing plate. The first gear meshes with the second gear; The cleaning device includes a first push rod, a support frame, an elastic telescopic rod, a cleaning rod and a first inclined block. The first push rod is fixedly installed on the top of the sliding rod. The support frame is fixedly installed at the bottom of the inner wall of the body. The elastic telescopic rod is fixedly installed at the bottom of the support frame. The cleaning rod is fixedly installed at the movable end of the elastic telescopic rod. The first inclined block is fixedly installed at the front of the cleaning rod. The surface of the first push rod in contact with the first inclined block is set as an inclined surface; The buffer device includes a second push rod, an inclined rod, a sliding plate, two second inclined blocks, a flap and a stop block. The second push rod is fixedly installed on the back of the cleaning rod. The inclined rod is slidably installed at the bottom of the inner wall of the body. The sliding plate is slidably installed at the bottom of the inner wall of the body. The two second inclined blocks are fixedly installed on the top of the sliding plate. The flap is rotatably installed between the two second inclined blocks. The stop block is fixedly installed at the bottom of the inner wall of the body. The surface of the second push rod in contact with the inclined rod is set as an inclined surface. The surface of the inclined rod in contact with the second inclined block is set as an inclined surface.

2. The overall device for high-precision AOI online detection of a liquid crystal display screen according to claim 1, characterized in that: A first spring is arranged between the pushing plate and the baffle.

3. The overall device for high-precision AOI online detection of a liquid crystal display screen according to claim 2, wherein: The cleaning device further includes a storage tank, a water pipe, a valve, a rotating ring, a convex block, two first rotating rods, a first belt, two first pushing blocks and a second pushing block. The storage tank is fixedly installed on the top of the support frame. The water pipe is fixedly installed at the bottom of the storage tank. The valve is fixedly installed on the circumferential surface of the water pipe. The rotating ring is fixedly installed at the control end of the valve. The convex block is fixedly installed on the circumferential surface of the rotating ring. The two first rotating rods are connected by a first belt. The two first pushing blocks are fixedly installed on the back of the first belt. The second pushing block is fixedly installed on the front of the first belt.

4. An overall device for high-precision AOI online detection of a liquid crystal display screen according to claim 3, characterized in that: A second spring is arranged between the first pushing block and the valve.

5. An overall device for high-precision AOI online detection of a liquid crystal display screen according to claim 4, characterized in that: The buffer device also includes two rotating rods 2, a belt 2, a fixed rod, a buffer plate and a connecting rod. The two rotating rods 2 are rotatably installed at the bottom of the inner wall of the machine body. The two rotating rods 2 are connected by a belt 2 transmission. One end of the fixed rod is fixedly installed on the back of the skateboard, and the other end of the fixed rod is fixedly installed on the front of the belt 2. The buffer plate is slidably installed at the bottom of the inner wall of the machine body, one end of the connecting rod is fixedly installed on the back of the belt 2, and the other end of the connecting rod is fixedly installed on the left side of the buffer plate.

6. An overall device for high-precision AOI online detection of a liquid crystal display screen according to claim 5, characterized in that: A spring three is arranged between the slide plate and the bottom of the inner wall of the machine body.

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