Liquid crystal screen detection device

Abstract

The invention relates to the technical field of liquid crystal display detection, in particular to a liquid crystal display detection device which comprises a dust-free box, the dust-free box is composed of an upper cavity and a lower cavity, material taking assemblies are arranged on the inner walls of the two sides of the upper cavity, a bearing plate is fixedly connected to the rear wall of the interior of the upper cavity, and a transmission assembly is fixedly connected to the top of the bearing plate. An angle adjusting assembly is arranged between the inner walls of the lower cavity, and three visual cameras and a cleaning eraser are arranged at the bottom of the side, close to the front wall of the upper cavity, of the bearing plate. According to the improved detection device, through mutual cooperation of the angle adjusting assembly and the transmission assembly, liquid crystal display conveying and automatic angle adjustment are achieved, angle detection is more comprehensive, omission and detection dead angles are reduced, materials are taken and placed through the material taking assembly, the liquid crystal display is taken into the dust-free box for detection, and the detection efficiency is improved. Dust is prevented from being attached to the cleaned liquid crystal screen again to affect detection, the whole process is completely and automatically carried out, and the automation degree is high.

Description

Technical Field

[0001] This invention relates to the field of LCD screen testing technology, specifically to an LCD screen testing device. Background Technology

[0002] An LCD screen uses liquid crystal material and a glass substrate as its basic components. Liquid crystal material is filled between two glass substrates. By changing the arrangement of molecules inside the liquid crystal material through voltage, light blocking and light transmission can be achieved to display images of varying depths and staggered shapes. Moreover, by adding a three-color filter layer between the two glass substrates, color images can be displayed. After the LCD screen is manufactured, it needs to be inspected, such as for defects on the glass substrate, to ensure product quality. Therefore, we have launched an LCD screen inspection device.

[0003] An existing patent (publication number: CN116819809B) discloses a display screen testing device, relating to the field of display screen testing technology. The device includes a base plate on which a conveyor bracket is mounted; a conveyor assembly mounted on the conveyor bracket for conveying the display screen, and a testing bracket mounted on the conveyor assembly; and a testing assembly mounted on the testing bracket for conducting power-on testing on the display screen. This invention, through the coordinated arrangement of the conveyor assembly, testing assembly, and drive assembly, enables power-on testing of the display screen via a combination of a rotating drum and a conveyor belt, and achieves automatic image acquisition. Compared to the traditional robotic arm-based material handling and testing method, this method allows for continuous power-on testing of the display screen, eliminating the time required for robotic arm material handling and the opening and closing of the testing equipment's clamps, thereby improving the efficiency of display screen testing.

[0004] An existing patent (publication number: CN101539674A) discloses an LCD glass substrate inspection system, comprising: at least one inspection mechanism having a camera lens with a polarizing film inside the camera lens, so that the image captured by the camera lens passes through the polarizing film for inspection; and an inspection platform located in front of the camera lens of the inspection mechanism for fixing an LCD glass substrate to be inspected and for the camera lens to capture an image for inspection, thereby achieving the effect that the inspection process will not cause damage to the polarizing film and the inspection result is accurate.

[0005] An existing patent (publication number: CN102393576A) discloses a visual inspection machine for glass substrates in liquid crystal displays, including an inspection base and at least two slide rails. The glass substrate to be inspected is fixed on the main body of the inspection base. The slide rails are disposed on at least two adjacent sides of the main body of the inspection base. The length direction of the slide rails is parallel to the horizontal plane of the main body of the inspection base, and the length directions of the slide rails on the adjacent sides are perpendicular to each other. The visual inspection machine also includes a coordinate reader, which is slidably connected to the slide rails. The coordinate reader is used to interactively form certain positions above the horizontal plane of the main body of the inspection base. The inspector obtains the corresponding coordinates of the glass substrate to be inspected by reading the coordinates of the positioning points.

[0006] Current technology for inspecting LCD screens relies on a single inspection angle, limiting inspection to a direction perpendicular to the screen. This single-angle inspection can lead to missed detections of shallow scratches. Furthermore, existing screen inspection devices use wiping blocks to clean the screen, but the presence of the transport box frame prevents the area near the transport box parallel to the wiping block from being cleaned, creating blind spots. Inadequate cleaning affects subsequent screen inspections. Additionally, after cleaning, the LCD screen is exposed to the external production line, allowing dust to re-adhere, compromising the screen's cleanliness until inspection is complete and impacting the overall process. Summary of the Invention

[0007] The purpose of this invention is to provide a liquid crystal display screen testing device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a liquid crystal display screen testing device, comprising a cleanroom, the cleanroom being composed of an upper chamber and a lower chamber, material handling components being provided on the inner walls of both sides of the upper chamber, a support plate being fixedly connected to the inner rear wall of the upper chamber, a transmission component being fixedly connected to the top of the support plate, an angle adjustment component being provided between the inner walls of the lower chamber, and three vision cameras and a cleaning pad being respectively provided on the bottom side of the support plate near the front wall of the upper chamber;

[0009] The material handling assembly includes a guide rail fixedly connected to the inner walls of both sides of the upper chamber and two unlocking rods. A vertical sliding seat is slidably connected to the middle of the guide rail. A cylinder is integrally formed at the top end of the vertical sliding seat. A spring is fixedly connected to the bottom surface of the vertical sliding seat. Two horizontal sliding rods pass through the middle of the vertical sliding seat. A semi-circular block is fixedly connected between the ends of the two horizontal sliding rods near the rear wall of the upper chamber. A ball is slidably connected to the middle of one side of the semi-circular block. A shaped slider is fixedly connected to the outer surface of the ball through a connecting rod. The shaped slider is slidably connected inside the shaped groove. The shaped groove is opened on one side of the acute-angle actuating rod. A cylinder is integrally formed at the end of the acute-angle actuating rod near the vertical sliding seat. A rotating shaft is fixedly connected to one side of the acute-angle actuating rod. The end of the rotating shaft away from the acute-angle actuating rod is rotatably connected to the inner wall of the upper chamber. A torsion spring is provided between the inner wall of the upper chamber and the acute-angle actuating rod.

[0010] Preferably, a first cam is attached to the side of the first cylinder, and a second cam is attached to the side of the second cylinder, with a connecting bushing penetrating the middle of both the first and second cams.

[0011] Preferably, a mounting base is fixedly connected between the ends of the two horizontal sliding rods near the front wall of the upper chamber. An air chamber is formed in the middle of the mounting base, and a suction cup is connected to the bottom of the air chamber. A piston is slidably connected inside the air chamber. A rack is fixedly connected to the top surface of the piston. A push rod is fixedly connected to the top end of the rack. A spring and a stop rod are fixedly connected to both ends of the bottom surface of the push rod. Two dampers are fixedly connected to the bottom surface of the push rod, and the bottom ends of the two dampers are connected to the top surface of the mounting base.

[0012] Preferably, the top surface of the mounting base is fixedly connected to two support rods, and a limit rod is fixedly connected between the top ends of the two support rods. A horizontal shaft is provided below the limit rod, and pawl one and pawl two pass through the two ends of the horizontal shaft, respectively.

[0013] Preferably, the two unlocking rods are at the same height, with one located inside the upper chamber and the other outside the upper chamber.

[0014] Preferably, the transmission assembly includes a dual-axis motor fixedly connected to the center of the top surface of the support plate. The output end of the dual-axis motor is fixedly connected to two output shafts. The ends of the two output shafts away from the dual-axis motor are rotatably connected to the inner wall of the upper chamber. One of the output shafts is fixedly inserted through the center of the first bevel gear. A second bevel gear meshes with one side of the first bevel gear. A vertical shaft is integrally formed in the center of the bottom surface of the second bevel gear. The bottom end of the vertical shaft rotatably passes through the bottom plate of the upper chamber and is connected to a third bevel gear. A fourth bevel gear meshes with one side of the third bevel gear. A transmission shaft is fixedly connected to one side of the fourth bevel gear.

[0015] Preferably, the end of the drive shaft away from the bevel gear is fixedly connected to two main pulleys, and the two main pulleys are rotatably connected to a secondary pulley via a drive belt. A conveyor roller is fixedly connected to the middle of one side of the secondary pulley. The conveyor roller is rotatably connected to both ends of the support frame. A conveyor belt is sleeved on the outer side of the support frame. One side of the support frame is connected to the inner bottom surface of the lower chamber via two support columns.

[0016] Preferably, the angle adjustment assembly includes a square base plate fixedly installed on the surface of the conveyor belt and a rack two fixedly connected between the inner walls on both sides of the lower chamber. A mounting column is fixedly connected to the center of the top surface of the square base plate. An adjusting gear one is rotatably sleeved on the outer side of the mounting column. An adjusting gear two is rotatably sleeved on the outer side of the adjusting gear one. An adjusting gear three is rotatably sleeved on the outer side of the adjusting gear two.

[0017] Preferably, the adjusting gear one, adjusting gear two, and adjusting gear three each have a hole in the middle, and a cylinder is provided at the top edge of the hole. An extension ring is integrally formed at the top of the cylinder. A support rod one is fixedly connected to the side of the extension ring. The top of the support rod one is rotatably connected to the support rod two through a connecting shaft. The top of the support rod two is rotatably connected to the detection platform through a connecting shaft. A placement groove is provided in the middle of the top surface of the detection platform.

[0018] Preferably, the second rack consists of three sets of racks: an upper rack, a middle rack, and a lower rack. Each set of racks is further divided into two racks, and the teeth of the two racks in each set are staggered on opposite sides.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] In this invention, the LCD screen on the external production line is picked up by the material picking component and placed into the upper chamber of the cleanroom. Since the testing process is carried out inside the cleanroom, it effectively prevents dust from falling back onto the cleaned LCD screen. After the test is completed, the LCD screen is picked up by the suction cup of the material picking component and discharged back into the cleanroom.

[0021] In this invention, the LCD screen that enters the upper chamber falls onto the detection platform and is then transported to the other side of the upper chamber by a conveyor belt. During the transport process, the LCD screen can be cleaned with a cleaning wiper and then detected by a vision camera. During transport, the angle adjustment component will automatically change the angle of the detection platform so that the vision camera can detect the LCD screen from different angles, making the detection angle more comprehensive and reducing omissions and blind spots.

[0022] In this invention, the LCD screen is picked up and placed using a material handling component. The LCD screen is picked up into or discharged from the cleanroom. During the picking and placing process, a piston is automatically triggered to firmly adsorb the LCD screen. After the adsorption is in place, the adsorption to the LCD screen is automatically released by the unlocking lever.

[0023] In this invention, by setting the transmission ratio between the bevel gears and pulleys, the material handling component and the transmission component are ensured to move in sync. This ensures that the detection platform is located below the suction cup for each material handling operation, resulting in a high degree of coordination. After the initial debugging is completed, it can be put into use. The entire process is fully automatic and has a high degree of automation. Attached Figure Description

[0024] Figure 1 This is a front-view stereoscopic structural diagram of the present invention;

[0025] Figure 2 This is a frontal cross-sectional three-dimensional structural diagram of the present invention;

[0026] Figure 3 This is a side view cross-sectional three-dimensional structural schematic diagram of the present invention;

[0027] Figure 4 This is a top-view cross-sectional three-dimensional structural diagram of the present invention;

[0028] Figure 5 This is a side cross-sectional three-dimensional structural diagram of the material handling component of the present invention;

[0029] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the diagram;

[0030] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point B in the diagram;

[0031] Figure 8 This is a top-view three-dimensional structural diagram of the conveyor belt of the present invention;

[0032] Figure 9 This is a schematic diagram of the three-dimensional structure of the visual camera of the present invention;

[0033] Figure 10 This is a schematic diagram of the two-stage front view of the rack structure of the present invention;

[0034] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point C;

[0035] Figure 12 This is a frontal cross-sectional three-dimensional structural diagram of the angle adjustment component of the present invention.

[0036] In the diagram: 1. Cleanroom; 101. Upper chamber; 102. Lower chamber; 2. Material handling assembly; 201. T-shaped guide rail; 202. Vertical sliding seat; 203. Cylinder one; 204. Spring one; 205. Horizontal sliding rod; 206. Semicircular block; 207. Ball bearing; 208. T-shaped slider; 209. T-shaped groove; 2010. Acute-angle actuating rod; 2011. Cylinder two; 2012. Rotating shaft; 20 13. Torsion spring; 2014. Cam 1; 2015. Cam 2; 2016. Mounting base; 2017. Air chamber; 2018. Suction cup; 2019. Piston; 2020. Rack 1; 2021. Push rod; 2022. Spring 2; 2023. Abutment rod; 2024. Damper; 2025. Support rod; 2026. Limiting rod; 2027. Horizontal shaft; 2028. Pawl 1; 2029. 1. Pawl 2; 2. Unlocking lever; 3. Bearing plate; 4. Transmission assembly; 401. Dual-axis motor; 402. Output shaft; 403. Bevel gear 1; 404. Bevel gear 2; 405. Vertical shaft; 406. Bevel gear 3; 407. Bevel gear 4; 408. Drive shaft; 409. Main pulley; 4010. Auxiliary pulley; 4011. Conveyor roller; 4012. Bearing frame; 4013. Conveyor belt; 5. Angle adjustment assembly; 501, square base plate; 502, rack two; 502a, upper rack; 502b, middle rack; 502c, lower rack; 503, mounting post; 504, adjusting gear one; 505, adjusting gear two; 506, adjusting gear three; 507, support link one; 508, support link two; 509, detection platform; 5010, placement slot; 6, vision camera; 7, cleaning eraser. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1 to 12 The present invention provides a technical solution: a liquid crystal screen testing device, including a cleanroom 1, which is composed of an upper chamber 101 and a lower chamber 102. The inner walls of both sides of the upper chamber 101 are provided with material picking components 2. The inner rear wall of the upper chamber 101 is fixedly connected with a support plate 3. The top of the support plate 3 is fixedly connected with a transmission component 4. An angle adjustment component 5 is provided between the inner walls of the lower chamber 102. Three vision cameras 6 and a cleaning wipe 7 are respectively provided on the bottom side of the support plate 3 near the front wall of the upper chamber 101.

[0039] In this embodiment, as Figures 2 to 7As shown, the material handling assembly 2 includes a T-shaped guide rail 201 fixedly connected to the inner walls of both sides of the upper chamber 101 and two unlocking rods 2030. A vertical sliding seat 202 is slidably connected to the middle of the T-shaped guide rail 201. A cylinder 203 is integrally formed at one top end of the vertical sliding seat 202. A spring 204 is fixedly connected to the bottom surface of the vertical sliding seat 202. Two horizontal sliding rods 205 pass through the middle of the vertical sliding seat 202. A semi-circular block 206 is fixedly connected between the ends of the two horizontal sliding rods 205 near the rear wall of the upper chamber 101. A ball bearing 207 is rolledly connected to the middle of one side of the semi-circular block 206. The outer surface of the ball bearing 207... A T-shaped slider 208 is fixedly connected to the surface via a connecting rod. The T-shaped slider 208 is slidably connected inside a T-shaped groove 209. The T-shaped groove 209 is located on one side of an acute-angle actuating rod 2010. A cylindrical second 2011 is integrally formed at one end of the acute-angle actuating rod 2010 near the vertical sliding seat 202. A rotating shaft 2012 is fixedly connected to one side of the acute-angle actuating rod 2010. The end of the rotating shaft 2012 away from the acute-angle actuating rod 2010 is rotatably connected to the inner wall of the upper chamber 101. A torsion spring 2013 is provided between the inner wall of the upper chamber 101 and the acute-angle actuating rod 2010. A cam 2 is attached to the side of the cylindrical first 203. 014, the side of cylinder 2011 is fitted with cam 2015, and the middle of both cam 2014 and cam 2015 are penetrated by connecting bushings; when cam 1014 and cam 2015 start to rotate under the drive of dual-axis motor 401, cam 1014 can drive the vertical sliding seat 202 to slide vertically along the T-shaped guide rail 201, while the rotation of cam 2015 can drive the acute angle lever 2010 to rotate around the rotating shaft 2012. At this time, the bottom end of the acute angle lever 2010 will push and pull the semicircular block 206 through the cooperation of T-shaped slider 208 and ball 207, so that the semicircular block 206... The circular block 206 drives the two horizontal sliding rods 205 to slide back and forth along their own axis. In conjunction with the vertical sliding seat 202 that moves up and down, it can drive the mounting seat 2016 to continuously enter and exit the upper chamber 101 to pick up and put in materials. It is worth noting that the material picking components 2 on both sides of the inner wall of the upper chamber 101 are asynchronous. The material picking component 2 on the right side is responsible for picking up the LCD screen on the external production line and placing it on the conveyor belt 4013 in the upper chamber 101. Conversely, the material picking component 2 on the left side is responsible for picking up the inspected LCD screen from the conveyor belt 4013 in the upper chamber 101 and putting it back on the external production line.

[0040] In this embodiment, as Figures 2 to 7As shown, a mounting base 2016 is fixedly connected between the ends of two horizontal sliding rods 205 near the front wall of the upper chamber 101. An air chamber 2017 is formed in the middle of the mounting base 2016. A suction cup 2018 is connected to the bottom of the air chamber 2017. A piston 2019 is slidably connected inside the air chamber 2017. A rack 2020 is fixedly connected to the top surface of the piston 2019. A push rod 2021 is fixedly connected to the top of the rack 2020. Springs 2022 and abutment rods 2023 are fixedly connected to both ends of the bottom surface of the push rod 2021. Two dampers 2024 are fixedly connected to the bottom surface of the push rod 2021, and the bottom ends of the two dampers 2024 are connected to the top surface of the mounting base 2016. The abutment rod 2024... The bottom end of 23 extends to the bottom surface of the mounting base 2016, and the bottom end of the abutment rod 2023 is normally located below the bottom surface of the suction cup 2018. The second spring 2022 is located between the top rod 2021 and the top surface of the mounting base 2016 to form an elastic structure. Two support rods 2025 are fixedly connected to the top surface of the mounting base 2016. A limit rod 2026 is fixedly connected between the top ends of the two support rods 2025. A horizontal shaft 2027 is provided below the limit rod 2026. Pad 1 2028 and Pad 2 2029 pass through the two ends of the horizontal shaft 2027 respectively. The two unlocking rods 2030 are at the same height. One of them is located inside the upper chamber 101, and the other is located outside the upper chamber 101.The unlocking lever 2030 on the side of the material-picking assembly 2 used to pick up the LCD screen from the external production line into the upper chamber 101 is located inside the upper chamber 101, and vice versa. The material-picking process of the mounting base 2016 is as follows: when the two cams rotate and engage, placing the mounting base 2016 directly above the LCD screen from the external production line, cam 2014 continues to rotate until cylinder 203 contacts the recess of cam 2014 under the restoring force of spring 204. At this time, the mounting base 2016 moves downward under the drive of the vertical sliding seat 202, and the bottom of the mounting base 2016... The suction cup 2018 is attached to the top surface of the LCD screen. At this time, the bottom ends of the abutment rods 2023 on both sides of the suction cup 2018 are attached to the top surface of the placement frame on the external assembly line where the LCD screen is placed. Under the pressure of the placement frame, the abutment rods 2023 move upward and compress the second spring 2022. During the upward movement of the abutment rods 2023, the top rod 2021 is also driven to rise. The rise of the top rod 2021 will drive the rack 2020 to move upward. The rack 2020 drives the bottom piston 2019 to draw the air chamber 2017 between the suction cup 2018 and the piston 2019 to negative pressure, so that the suction cup 2018 can firmly hold the screen in place. The LCD screen is attracted to the sensor. To prevent the piston 2019 from resetting, the teeth on one side of the rack 2020 are ratchet teeth, which lock with the pawl 2028 to prevent the piston 2019 from resetting. Then, with the continued rotation of the two cams, the mounting base 2016 is moved into the upper chamber 101. At this time, the suction cup 2018 is positioned above the detection platform 509. Then, the vertical sliding seat 202, under the action of the rotating cams, moves the mounting base 2016 downwards. During this process, the pawl 2029 contacts the unlocking lever 2030 on the side wall of the upper chamber 101. The unlocking lever 2030 blocks the contact. When the second pawl 2029 rotates around the horizontal axis 2027, the horizontal axis 2027 causes the first pawl 2028 to disengage from the ratchet teeth on the rack 2020. Under the rebound action of the second spring 2022, the piston 2019 moves down to reset, and the suction cup 2018 releases its adsorption on the LCD screen, placing the LCD screen on the detection platform 509 for detection. It should be noted that the maximum rotation angle of the second pawl 2029 is blocked by the limiting rod 2026, preventing the second pawl 2029 from rotating to the other side of the two support rods 2025 and thus losing contact with the rack 2020.

[0041] In this embodiment, as Figure 2 , Figure 3 , Figure 8 and Figure 10As shown, the transmission assembly 4 includes a dual-axis motor 401 fixedly connected to the center of the top surface of the support plate 3. Two output shafts 402 are fixedly connected to the output end of the dual-axis motor 401. The ends of the two output shafts 402 away from the dual-axis motor 401 are rotatably connected to the inner wall of the upper chamber 101. One output shaft 402 is fixedly inserted through the center of a first bevel gear 403. A second bevel gear 404 meshes with one side of the first bevel gear 403. A vertical shaft 405 is integrally formed in the center of the bottom surface of the second bevel gear 404. The bottom end of the vertical shaft 405 rotatably passes through the bottom plate of the upper chamber 101 and connects to a third bevel gear 406. One side of the third bevel gear 406 meshes with... There is a bevel gear 407, and a drive shaft 408 is fixedly connected to one side of the bevel gear 407. The drive shaft 408 rotatably passes through the middle of a vertical fixed column. The two ends of the vertical fixed column are respectively fixedly connected to the upper and lower inner walls of the lower chamber 102. The two ends of the two output shafts 402 are fixedly passed through the middle of the connecting bushings. Two main pulleys 409 are fixedly connected to the end of the drive shaft 408 away from the bevel gear 407. The two main pulleys 409 are rotatably connected to a secondary pulley 4010 through a drive belt. A conveyor roller 4011 is fixedly connected to the middle of one side of the secondary pulley 4010. The conveyor roller 4011 is rotatably connected to both ends of the support frame 4012. A conveyor belt 4013 is fitted around the outer side of the support frame 4012. One side of the support frame 4012 is connected to the inner bottom surface of the lower chamber 102 via two L-shaped support columns. When the dual-shaft motor 401 starts, it drives bevel gear 1 403 to rotate. Bevel gear 1 403 drives bevel gear 2 404 to rotate. Bevel gear 2 404 drives bevel gear 3 406 to rotate via vertical shaft 405. Bevel gear 3 406 drives bevel gear 407 to rotate. Bevel gear 407 drives main pulley 409 to rotate via drive shaft 408. Main pulley 409 drives auxiliary pulley 4010 to rotate via drive belt. Auxiliary pulley 4010 drives the conveyor belt. The roller 4011 rotates, and the conveyor belt 4013 is conveyed by the rotation of the conveyor roller 4011. It is worth noting that the transmission ratio of bevel gear 1 403 and bevel gear 407 is equal to the transmission ratio of conveyor belt 4013 and conveyor roller 4011. Furthermore, the transmission ratio of main pulley 409 and auxiliary pulley 4010 is 1:1. Bevel gear 407 and main pulley 409 are coaxially driven. Therefore, for every one rotation of bevel gear 1 403, the conveyor belt 4013 also rotates exactly one rotation. This structure enables the angle adjustment component 5 on the outer surface of the conveyor belt 4013 to make periodic movements, which facilitates the cooperation between the angle adjustment component 5 and the material picking component 2.

[0042] In this embodiment, as Figures 10 to 12As shown, the angle adjustment assembly 5 includes a square base plate 501 fixedly installed on the surface of the conveyor belt 4013 and a rack 502 fixedly connected between the inner walls of both sides of the lower chamber 102. A mounting post 503 is fixedly connected to the center of the top surface of the square base plate 501. An adjusting gear 504 is rotatably sleeved on the outer side of the mounting post 503. An adjusting gear 505 is rotatably sleeved on the outer side of the adjusting gear 504. An adjusting gear 506 is rotatably sleeved on the outer side of the adjusting gear 505. Holes are provided in the center of each of the adjusting gears 504, 505, and 506, and a cylinder is provided at the top edge of the hole. An extension ring is integrally formed at the top of the cylinder, and a support rod 507 is fixedly connected to the side of the extension ring. The top of the first support rod 507 is rotatably connected to the second support rod 508 via a connecting shaft. The top of the second support rod 508 is rotatably connected to the detection platform 509 via a connecting shaft. A placement groove 5010 is provided in the middle of the top surface of the detection platform 509. The second rack 502 consists of three sets of racks: an upper rack 502a, a middle rack 502b, and a lower rack 502c. Each set of racks is further divided into two racks. The teeth of the two racks in each set are staggered on opposite sides. Three vision cameras 6 are located directly above the teeth of the three sets of racks. The square base plate 501 is not entirely adhered to the outer surface of the conveyor belt 4013; rather, only the strip-shaped area in the middle of the bottom surface of the square base plate 501 is adhered to the conveyor belt 4013. Therefore... The conveyor belt 4013 can drive the square base plate 501 to perform a circular cyclic motion; this structure enables the vision camera 6 to take pictures and inspect the LCD screen in the placement slot 5010. Furthermore, as the conveyor belt 4013 transports the LCD screen from right to left, the three adjusting gears sequentially mesh with the teeth of the upper rack 502a, middle rack 502b, and lower rack 502c. During transport, the adjusting gears first mesh with the teeth of the rack 502 near the rear wall of the lower chamber 102, causing the meshing adjusting gears to rotate. This rotates the support connecting rod 507 and the support connecting rod 508, lowering the height of one side of the detection platform 509 and changing the tilt angle of the detection platform 509. At this time, the... The vision camera 6 above the inspection platform 509 can take pictures at an angle that is not perpendicular to the inspection platform 509, avoiding the situation where the inspection can only be carried out at an angle perpendicular to the LCD screen. The inspection angle is more comprehensive, reducing omissions and blind spots. Furthermore, during the process of the inspection platform 509 being transported from right to left by the conveyor belt 4013, before the adjusting gears are engaged, the inspection platform 509 first drives the LCD screen in the placement slot 5010 to pass under the cleaning wiper 7. The bottom surface of the cleaning wiper 7 is at the same height as the top surface of the LCD screen placed in the placement slot 5010. Therefore, the cleaning wiper 7 can wipe and clean the LCD screen, preventing dust and other impurities from falling on the LCD screen and affecting the inspection.

[0043] The method of use and advantages of this invention: The working process of this LCD screen detection device is as follows:

[0044] First, the LCD screen from the external production line is picked up by the material handling component 2 and placed into the upper chamber 101 of the cleanroom 1. The LCD screen in the upper chamber 101 falls onto the inspection platform 509, and then is conveyed to the other side of the upper chamber 101 by the conveyor belt 4013. During the conveying process, the LCD screen is cleaned by the cleaning wipe 7. Then, the vision camera 6 inspects it. During the conveying, the angle adjustment component 5 automatically changes the angle of the inspection platform 509 so that the vision camera 6 can inspect the LCD screen from different angles, making the inspection angle more comprehensive and reducing omissions and blind spots. Since the inspection process is carried out in the cleanroom 1, it effectively prevents dust from falling back onto the cleaned LCD screen. After the inspection is completed, the LCD screen is picked up by the suction cup 2018 of the material handling component 2 and discharged back into the cleanroom 1.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid crystal screen detection device, comprising a dust-free box (1), characterized in that: The dust-free box (1) is composed of an upper chamber (101) and a lower chamber (102); the inner walls on both sides of the upper chamber (101) are provided with material taking components (2); the inner rear wall of the upper chamber (101) is fixedly connected with a carrying plate (3); the top of the carrying plate (3) is fixedly connected with a transmission component (4); an angle adjustment component (5) is provided between the inner walls of the lower chamber (102); and three visual cameras (6) and a cleaning eraser (7) are respectively provided at the bottom of one side of the carrying plate (3) close to the front wall of the upper chamber (101); The material taking assembly (2) comprises a T-shaped guide rail (201) fixedly connected to the inner walls of both sides of the upper chamber (101) and two unlocking rods (2030); the middle part of the T-shaped guide rail (201) is slidably connected to a vertical sliding seat (202); a cylinder (203) is integrally formed at one end of the top of the vertical sliding seat (202); a spring (204) is fixedly connected to the bottom surface of the vertical sliding seat (202); two horizontal sliding rods (205) pass through the middle part of the vertical sliding seat (202); a semicircular block (206) is fixedly connected between the ends of the two horizontal sliding rods (205) close to the rear wall of the upper chamber (101); a ball (207) is rollingly connected to the middle part of one side of the semicircular block (206) The outer surface of the ball bearing (207) is fixedly connected to a T-shaped slider (208) via a connecting rod, and the T-shaped slider (208) is slidably connected to the inside of a T-shaped slide groove (209). The T-shaped slide groove (209) is provided on one side of an acute-angle toggle rod (2010), and a cylinder 2 (211) is integrally formed at one end of the acute-angle toggle rod (2010) close to the vertical sliding seat (202). A rotating shaft (2012) is fixedly connected to one side of the acute-angle toggle rod (2010), and an end of the rotating shaft (2012) away from the acute-angle toggle rod (2010) is rotatably connected to the inner wall of the upper chamber (101), and a torsion spring (2013) is provided between the inner wall of the upper chamber (101) and the acute-angle toggle rod (2010).

2. A liquid crystal screen detection device according to claim 1, characterized in that: The side surface of the cylinder one (203) is fitted with a cam one (2014), and the side surface of the cylinder two (2011) is fitted with a cam two (2015), and the middle parts of the cam one (2014) and the cam two (2015) are penetrated by a connecting sleeve.

3. The liquid crystal screen detection device according to claim 1, characterized in that: A mounting seat (2016) is fixedly connected between one end of the two horizontal sliding rods (205) close to the front wall of the upper chamber (101); an air cavity (2017) is provided in the middle of the mounting seat (2016); the bottom of the air cavity (2017) is connected to a suction cup (2018); a piston (2019) is slidably connected inside the air cavity (2017); a rack 1 (2020) is fixedly connected to the top surface of the piston (2019); a top end of the rack 1 (2020) is fixedly connected to a push rod (2021); spring 2 (2022) and abutment rod (2023) are fixedly connected to the two ends of the bottom surface of the push rod (2021); two dampers (2024) are fixedly connected to the bottom surface of the push rod (2021); the bottom ends of the two dampers (2024) are connected to the top surface of the mounting seat (2016).

4. A liquid crystal screen detection device according to claim 3, characterized in that: Two support rods (2025) are fixedly connected to the top surface of the mounting seat (2016), a limiting rod (2026) is fixedly connected between the top ends of the two support rods (2025), a horizontal axis (2027) is provided below the limiting rod (2026), and a ratchet 1 (2028) and a ratchet 2 (2029) are respectively passed through the two ends of the horizontal axis (2027).

5. The liquid crystal screen detection device according to claim 1, characterized in that: The two unlocking rods (2030) are of the same height, one of which is located on the inner side of the upper chamber (101), and the other is located on the outer side of the upper chamber (101).

6. The liquid crystal screen detection device according to claim 1, characterized in that: The transmission assembly (4) comprises a dual-axis motor (401) fixedly connected to the middle of the top surface of the carrier plate (3), the output end of the dual-axis motor (401) is fixedly connected to two output shafts (402), one end of the two output shafts (402) away from the dual-axis motor (401) is rotatably connected to the inner wall of the upper chamber (101), one of the output shafts (402) is fixedly passed through the middle of bevel gear one (403), one side of the bevel gear one (403) is meshed with bevel gear two (404), the middle part of the bottom surface of bevel gear two (404) is integrally formed with a vertical shaft (405), the bottom end of the vertical shaft (405) is rotatably passed through the bottom plate of the upper chamber (101) and connected to bevel gear three (406), one side of the bevel gear three (406) is meshed with bevel gear four (407), and one side of the bevel gear four (407) is fixedly connected to a transmission shaft (408).

7. A liquid crystal screen detection device according to claim 6, characterized in that: One end of the transmission shaft (408) away from the bevel gear four (407) is fixedly connected to two main pulleys (409), and the two main pulleys (409) are rotatably connected to the secondary pulleys (4010) through transmission belts. A conveying roller (4011) is fixedly connected to the middle of one side of the secondary pulley (4010), and the conveying roller (4011) is rotatably connected to the two ends of the support frame (4012). The outer side of the support frame (4012) is provided with a conveying belt (4013), and one side of the support frame (4012) is connected to the inner bottom surface of the lower chamber (102) through two L-shaped support columns.

8. The liquid crystal screen detection device according to claim 1, characterized in that: The angle adjustment assembly (5) comprises a square bottom plate (501) fixedly mounted on the surface of the conveyor belt (4013) and a rack gear 2 (502) fixedly connected between the inner walls on both sides of the lower chamber (102); a mounting column (503) is fixedly connected to the middle of the top surface of the square bottom plate (501); an adjusting gear 1 (504) is rotatably sleeved on the outer side of the mounting column (503); an adjusting gear 2 (505) is rotatably sleeved on the outer side of the adjusting gear 1 (504); and an adjusting gear 3 (506) is rotatably sleeved on the outer side of the adjusting gear 2 (505).

9. A liquid crystal screen detection device according to claim 8, characterized in that: The adjusting gear 1 (504), the adjusting gear 2 (505) and the adjusting gear 3 (506) are all provided with holes in the middle, and a cylinder is provided at the top of the edge of the hole, the top of the cylinder is integrally formed with an extension ring, the side of the extension ring is fixedly connected with a support link 1 (507), the top of the support link 1 (507) is rotatably connected to the support link 2 (508) via a connecting shaft, the top of the support link 2 (508) is rotatably connected to the detection platform (509) via a connecting shaft, and a placement groove (5010) is provided in the middle of the top surface of the detection platform (509).

10. The liquid crystal screen detection device according to claim 8, characterized in that: The second rack (502) is composed of three groups of racks, namely an upper rack (502a), a middle rack (502b) and a lower rack (502c), and each group of racks is divided into two racks, and teeth are staggeredly distributed on opposite sides of the two racks in each group.

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