Glue overflow detection equipment for display screen and detection method thereof

Abstract

The invention provides excessive glue detection equipment for a display screen and a detection method thereof.The excessive glue detection equipment comprises a workbench, a control panel, a conveying belt and a conveying motor, the control panel is fixed to the right side of the upper surface of the workbench, the conveying belt is rotationally connected to the left side of the upper surface of the workbench through a support and a conveying roller, and the conveying motor is fixed to a support on the outer side of the conveying belt; a hydraulic cylinder is vertically fixed below the rear end of the workbench, a mounting frame is fixed above a push rod at the output end of the hydraulic cylinder, a detection assembly is arranged above the mounting frame, electric push rods are vertically fixed at the front and rear ends of the right side of the bottom of the workbench, and a fixing plate is fixed at the tops of the push rods at the output ends of the two electric push rods; according to the glue overflow detection device, the detection position of the display screen can be adjusted according to the actual situation, after glue overflow detection is completed on the upper surface of the display screen, the display screen can be automatically turned over to conduct glue overflow detection on the back face of the display screen, the detection effect on the display screen is good, and use is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular to a display screen glue overflow detection device and a detection method thereof. Background Art

[0002] With the continuous improvement of living standards, users have higher and higher requirements for the quality of various electronic products, especially hoping that electronic products can provide better screen display effects. This requires manufacturers to test the display effects of electronic product display screens so that the display screens of electronic products can enter the market only when they meet the quality standards. After the display screen is die-cut and glued with the rest of the film layer, sometimes the edge will overflow due to poor sealing. Some of the overflow points are very small and cannot be identified by the naked eye of the staff. Therefore, overflow detection equipment is used to test the display screen; For example, in the prior art, a device for detecting appearance overflow of glue is disclosed with patent number CN202211173404.1. The product is embedded in the product positioning groove of the upper plate, and the lower convex guide column of the upper plate is moved along the long side guide inner groove in sequence so that the CCD lens captures the entire image of the first side (long side) of the product. The lower convex guide column is moved along the short side guide inner groove and the auxiliary side guide inner groove so that the CCD lens captures the entire image of the second side (short side) of the product. Then, the above steps are repeated to the corresponding edge groove area, so that the four sides of the product frame pass through the circular observation area. The running observation area is magnified several times by the CCD lens and then presented to the display part, and the video image obtained by the detection is compared with the edge interval image of the qualified product through the comparison module to determine whether it is qualified, and the detection and determination are performed by the naked eye at the same time. It can accurately and reliably detect whether the edge of the product has overflow of glue, thereby improving the inspection capacity.

[0003] However, after this type of device actually inspects the display screen, since glue overflow is sometimes prone to occur on the back of the display screen, after the inspection of the upper surface of the display screen is completed, workers are required to turn it over to allow the device to inspect the back of the display screen for glue leakage again, which further increases the labor intensity of the workers and reduces the inspection efficiency. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a display screen glue overflow detection device and a detection method thereof to solve the problems described in the above background technology.

[0005] The present invention provides a display screen glue overflow detection device and a detection method thereof, which are achieved by the following specific technical means: a display screen glue overflow detection device, including a workbench, a control panel, a conveyor belt and a conveyor motor, a control panel is fixed to the right side of the upper surface of the workbench, a conveyor belt is rotatably connected to the left side of the upper surface of the workbench through a bracket and a conveyor roller, a conveyor motor is fixed to the support on the outer side of the conveyor belt, a hydraulic cylinder is vertically fixed below the rear end of the workbench, a mounting frame is fixed above the push rod at the output end of the hydraulic cylinder, a detection component is arranged above the mounting frame, electric push rods are vertically fixed at the front and rear ends of the right side of the bottom of the workbench, fixed plates are fixed to the tops of the push rods at the output ends of the two electric push rods, and an auxiliary component is arranged above the fixed plate.

[0006] As a further solution of the present invention: the detection assembly is composed of a track, a mounting plate, a connecting plate, a support frame, a CCD lens and a first servo motor; Specifically, tracks are fixed laterally at the front and rear ends of the top of the mounting frame, a mounting plate is fixed on the upper outer side between the two tracks, a connecting plate is embedded in the interior of the mounting plate, the top of the connecting plate is rotatably connected to a support frame via an axle rod, a CCD lens is fixed at the lower front end of the support frame, and a servo motor is fixed to the right side of the mounting frame.

[0007] As a further solution of the present invention: the left and right sides of the rear end of the workbench are opened with limit openings whose cross-sectional area is consistent with the size of the mounting frame, the top of the push rod at the output end of the hydraulic cylinder is fixedly connected to the mounting frame, and the mounting frame is lifted up and down in the vertical direction on the workbench.

[0008] As a further solution of the present invention: the connecting disk rotates 180° left and right inside the mounting disk, and the left and right ends above the mounting disk are vertically embedded with limiting screws, and the bottom ends of the limiting screws are tightly attached to the left and right ends above the connecting disk.

[0009] As a further solution of the present invention: the top of the mounting frame is laterally rotatably connected with a screw rod, the screw rod is embedded in the bottom end of the mounting plate and is connected to the inside of the mounting plate through a thread, the first servo motor is rotatably connected to the screw rod through a chain belt, and the mounting plate slides horizontally left and right between the two tracks.

[0010] As a further solution of the present invention: the auxiliary assembly is composed of a fixing plate, a second servo motor, a fixing cylinder, a micro air pump, a limiting rod, a limiting plate, an extension column and an extension cylinder; Specifically, a fixing plate is vertically fixed to the top of the push rods at the output ends of the two electric push rods, a second servo motor is fixed to the top of the fixing plate, a fixing cylinder is horizontally embedded in the upper part of the interior of the fixing plate, a micro air pump is fixed to the middle part of the right side of the fixing cylinder, limiting rods are vertically fixed on the left and right sides of the upper and lower ends of the interior of the fixing cylinder, limiting plates are nested on the outer sides of the limiting rods, extension columns are vertically fixed on one side of the two limiting plates away from the middle of the fixing cylinder, and extension cylinders are nested on the outer sides of the extension columns.

[0011] As a further solution of the present invention: a fixing port is provided in the horizontal opening in the middle part of the left side of the fixing cylinder, the middle part of the fixing port and the middle part of the upper surface of the conveyor belt are both in the same horizontal horizontal plane, the two limiting plates are respectively embedded in the upper and lower ends of the fixing port, and the two limiting plates are symmetrically arranged around the horizontal center axis of the fixing port.

[0012] As a further solution of the present invention: the pipes at the inlet and outlet ends of the micro air pump are connected to the inner and outer sides of the extension tube, the outer wall of the extension column is close to the inner wall of the extension tube, and the extension column rises and falls vertically in the extension tube.

[0013] As a further solution of the present invention: a gear plate with a diameter larger than that of the fixed cylinder is fixed on the right side of the outer wall of the fixed cylinder, and the output end of the second servo motor is rotationally connected to the fixed cylinder through the gear and the gear plate.

[0014] As a further solution of the present invention, the following steps are specifically included: S1: Before the detection, the hydraulic cylinder pulls the mounting frame up and down to make the mounting frame pull the CCD lens up and down through the track, the mounting plate connecting plate, and the support frame to adjust the distance between the bottom of the CCD lens and the upper surface of the conveyor belt. The first servo motor drives the screw to rotate at the bottom of the mounting plate, so that the mounting plate pulls the CCD lens to move left and right above the conveyor belt through the connecting plate and the support frame to adjust the detection position of the display screen; S2: After the display screen to be tested is placed on the conveyor belt, the conveyor motor drives the conveyor belt to rotate through the output roller to convey the display screen to the right, so that the display screen is conveyed to the bottom of the CCD lens; S3: The CCD lens sends the captured image information to the control panel. The control panel compares the received image information with the edge interval image of the qualified product through its own comparison module to determine whether it is qualified for glue overflow. After that, the control panel accurately and reliably sends the information of whether the display screen has glue overflow to the connected display for display; S4: After the detection of the upper surface of the display screen is completed, the conveying motor drives the conveyor belt to rotate and continue to convey the display screen to the right. At this time, the right side of the display screen will be just embedded in the fixing opening in the middle of the fixing tube, while the left side continues to remain on the right side of the upper surface of the conveyor belt. Then, the micro air pump generates gas to enter the two extension tubes, so that the extension column at one end of the two extension tubes simultaneously pushes the limit plate to move and closely adhere to the upper and lower ends of the display screen due to the action of air pressure, thereby clamping and limiting the display screen; S5: The electric push rod pushes the fixed plate up, and then the second servo motor drives the fixed cylinder to rotate 180° to turn the display screen over. Then the electric push rod pulls the fixed plate down to restore the original position, so that the left side of the display screen continues to be close to the upper surface of the conveyor belt. The micro air pump extracts the gas in the extension column so that the limit plate returns to its original position and no longer clamps the display screen. S6: The conveying motor drives the conveying belt to rotate and continue to convey the display screen to the left. When the display screen moves to below the CCD lens, the back of the display screen is detected.

[0015] 1. After the overflow detection on the upper surface of the display screen is completed, the conveying motor drives the conveyor belt to rotate and continue to convey the display screen to the right. At this time, the right side of the display screen will be just embedded in the fixed port in the middle of the fixed cylinder, and the left side will continue to remain on the right side of the upper surface of the conveyor belt. Then the micro air pump generates gas to enter the two extension cylinders, so that the extension column at one end of the two extension cylinders simultaneously pushes the limit plate to move close to the upper and lower ends of the display screen due to the air pressure, and the display screen is clamped and limited. The electric push rod pushes the fixed plate to rise, and then the second servo motor drives the fixed cylinder to rotate 180° to turn the display screen over. Then the electric push rod pulls the fixed plate down to restore its original position, so that the left side of the display screen continues to be close to the upper surface of the conveyor belt. After the display screen is unlocked, the conveying motor drives the conveyor belt to rotate and continue to convey the display screen to the left. When the display screen moves to the bottom of the CCD lens, the back of the display screen will be detected for glue leakage, which can realize the simultaneous detection of the upper surface and the back of the display screen, with high flexibility and detection efficiency, and more convenient for the overflow detection of the display screen.

[0016] 2. In the process of detecting the overflow of glue on the display screen, the present invention can allow the hydraulic cylinder to pull the mounting frame up and down according to the actual situation, so that the mounting frame can pull the CCD lens up and down through the track, the mounting plate connecting plate and the support frame to adjust the distance between the bottom of the CCD lens and the upper surface of the conveyor belt, and allow the first servo motor to drive the screw rod to rotate at the bottom of the mounting plate, so that the mounting plate pulls the CCD lens to move left and right above the conveyor belt through the connecting plate and the support frame to adjust the detection position of the display screen. The connection plate can also be pushed to rotate left and right in the mounting plate to adjust the position of the CCD lens at the left and right ends of the upper surface of the conveyor belt. The flexibility and detection efficiency are high, and the detection of overflow of glue on the display screen is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the back side of the overall structure of the present invention; Figure 3 It is a front cross-sectional schematic diagram of the overall structure of the present invention; Figure 4 It is an exploded schematic diagram of the local structure of the mounting plate in the present invention; Figure 5 It is a front view schematic diagram of the local structure of the fixed cylinder in the present invention; Figure 6 It is a front cross-sectional schematic diagram of the local structure of the fixing cylinder in the present invention; Figure 7 It is a schematic diagram of the local structure of the limiting plate in the present invention.

[0018] Legend: Workbench 1, control panel 101, conveyor belt 102, conveying motor 103, mounting frame 2, hydraulic cylinder 201, track 202, mounting plate 203, connecting plate 204, support frame 205, CCD lens 206, first servo motor 207, electric push rod 3, fixing plate 301, second servo motor 302, fixing cylinder 303, micro air pump 304, limiting rod 306, limiting plate 307, extension column 308, extension cylinder 309. DETAILED DESCRIPTION

[0019] Example 1, please refer to Figure 1-7 A glue overflow detection device for a display screen includes a workbench 1, a control panel 101, a conveyor belt 102 and a conveyor motor 103. The control panel 101 is fixed to the right side of the upper surface of the workbench 1, and the conveyor belt 102 is rotatably connected to the left side of the upper surface of the workbench 1 through a bracket and a conveyor roller. The conveyor motor 103 is fixed to the support outside the conveyor belt 102. A hydraulic cylinder 201 is vertically fixed below the rear end of the workbench 1, a mounting frame 2 is fixed above the push rod at the output end of the hydraulic cylinder 201, and a detection component is arranged above the mounting frame 2. Electric push rods 3 are vertically fixed to the front and rear ends of the right side of the bottom of the workbench 1, and a fixing plate 301 is fixed to the top of the push rods at the output ends of the two electric push rods 3, and an auxiliary component is arranged above the fixing plate 301.

[0020] The detection assembly is composed of a track 202, a mounting plate 203, a connecting plate 204, a support frame 205, a CCD lens 206 and a first servo motor 207; Specifically, the front and rear ends of the top of the mounting frame 2 are both transversely fixed with rails 202, a mounting plate 203 is fixed on the upper outer side between the two rails 202, a connecting plate 204 is embedded inside the mounting plate 203, the top of the connecting plate 204 is rotatably connected to a support frame 205 through a shaft, a CCD lens 206 is fixed at the lower front end of the support frame 205, and a servo motor 207 is fixed on the right side of the mounting frame 2; The left and right sides of the rear end of the workbench 1 are both opened with limit openings with a cross-sectional area consistent with the size of the mounting frame 2. The top of the push rod at the output end of the hydraulic cylinder 201 is fixedly connected to the mounting frame 2, and the mounting frame 2 is lifted up and down in the vertical direction in the workbench 1. Before the display screen is tested, the hydraulic cylinder 201 pulls the mounting frame 2 up and down, so that the mounting frame 2 pulls the CCD lens 206 up and down through the track 202, the mounting plate 203, the connecting plate 204, and the support frame 205 to adjust the distance between the bottom of the CCD lens 206 and the upper surface of the conveyor belt 102; The connecting plate 204 rotates 180° left and right inside the mounting plate 203, and the left and right ends above the mounting plate 203 are vertically embedded with limit screws, and the bottom ends of the limit screws are closely attached to the left and right ends above the connecting plate 204; The connection disk 204 can also be pushed to rotate left and right in the mounting disk 203 to adjust the position of the CCD lens 206 at the left and right ends of the upper surface of the conveyor belt 102. Subsequently, the limiting screw on the connection disk 204 is twisted to close to the mounting disk 203 to prevent the mounting disk 203 from rotating inside the connection disk 204. The flexibility is high, and the overflow detection of the display screen is more convenient. The top of the mounting frame 2 is connected to a screw rod for horizontal rotation. The screw rod is embedded in the bottom of the mounting plate 203 and connected to the inside of the mounting plate 203 through a thread. The first servo motor 207 is connected to the screw rod for rotation through a chain belt. The mounting plate 203 slides horizontally left and right between the two rails 202. The first servo motor 207 drives the screw rod to rotate at the bottom of the mounting plate 203, so that the mounting plate 203 pulls the CCD lens 206 to move left and right above the conveyor belt 102 through the connecting plate 204 and the support frame 205 to adjust the detection position of the display screen, which has high flexibility and is more convenient for the overflow detection of the display screen.

[0021] Example 2, please refer to Figure 1-7 , Embodiment 2 is different from Embodiment 1 in that the auxiliary component is composed of a fixing plate 301, a second servo motor 302, a fixing cylinder 303, a micro air pump 304, a limiting rod 306, a limiting plate 307, an extension column 308 and an extension cylinder 309; A fixing plate 301 is vertically fixed to the top of the push rods at the output ends of the two electric push rods 3, a second servo motor 302 is fixed to the top of the fixing plate 301, a fixing cylinder 303 is horizontally embedded in the upper part of the fixing plate 301, a micro air pump 304 is fixed to the middle part of the right side of the fixing cylinder 303, and limiting rods 306 are vertically fixed to the left and right sides of the upper and lower ends of the fixing cylinder 303, and limiting plates 307 are embedded on the outer sides of the limiting rods 306, and extension columns 308 are vertically fixed to the sides of the two limiting plates 307 away from the middle of the fixing cylinder 303, and extension cylinders 309 are embedded on the outer sides of the extension columns 308; A fixing opening is provided at the left middle lateral opening of the fixing cylinder 303, the middle of the fixing opening and the middle of the upper surface of the conveyor belt 102 are both on the same horizontal horizontal plane, two limiting plates 307 are respectively embedded at the upper and lower ends of the fixing opening, and the two limiting plates 307 are symmetrically arranged around the horizontal central axis of the fixing opening; After the detection of the upper surface of the display screen is completed, the conveying motor 103 drives the conveying belt 102 to rotate and continue to convey the display screen to the right, so that the right side of the display screen will be just embedded in the fixing opening in the middle of the fixing cylinder 303, and the left side will continue to remain on the right side of the upper surface of the conveying belt 102, which is more convenient for the subsequent turning over operation of the display screen; The pipes at the inlet and outlet ends of the micro air pump 304 are connected to the inner and outer sides of the extension tube 309, the outer wall of the extension column 308 is in close contact with the inner wall of the extension tube 309, and the extension column 308 rises and falls vertically in the extension tube 309; The main function of the limit rod 306 is to limit the upward and downward movement of the limit plate 307 to avoid displacement of the limit plate 307 during the upward and downward movement. When the right side of the display screen is embedded in the fixing opening in the middle of the fixing tube 303, the micro air pump 304 generates gas that enters the two extension tubes 309, so that the extension column 308 at one end of the two extension tubes 309 simultaneously pushes the limiting plate 307 to move and closely contact the upper and lower ends of the display screen due to the air pressure, thereby clamping and limiting the display screen, and preventing the display screen fixed in the middle of the fixing tube 303 from falling off from the middle during the rotation process; When the display screen is turned over and the fixing plate 301 returns to its original position, the micro air pump 304 extracts the gas in the extension tube 309 so that the extension column 308 at one end of the two extension tubes 309 pulls the limit plate 307 away from the upper and lower ends of the display screen due to the air pressure to unlock the display screen; A gear plate having a diameter larger than that of the fixed cylinder 303 is fixed on the right side of the outer wall of the fixed cylinder 303, and the output end of the second servo motor 302 is rotatably connected to the fixed cylinder 303 through the gear and the gear plate; After the electric push rod 3 pushes the fixing plate 301 upward, the second servo motor 302 drives the fixing cylinder 303 to rotate 180 degrees to turn over the display screen in the middle thereof.

[0022] Example 3, please refer to Figure 1-7 The difference between Example 3 and Example 2 is that it further includes the following steps: S1: Before the detection, the hydraulic cylinder 201 pulls the mounting frame 2 up and down, so that the mounting frame 2 pulls the CCD lens 206 up and down through the track 202, the mounting plate 203, the connecting plate 204, and the support frame 205, and adjusts the distance between the bottom of the CCD lens 206 and the upper surface of the conveyor belt 102. The first servo motor 207 drives the screw rod to rotate at the bottom of the mounting plate 203, so that the mounting plate 203 pulls the CCD lens 206 to move left and right above the conveyor belt 102 through the connecting plate 204 and the support frame 205 to adjust the detection position of the display screen; S2: After the display screen to be inspected is placed on the conveyor belt 102, the conveying motor 103 drives the conveyor belt 102 to rotate through the output roller to convey the display screen to the right, so that the display screen is conveyed to the bottom of the CCD lens 206; S3: The CCD lens 206 sends the captured image information to the control panel 101. The control panel 101 compares the received image information with the edge interval image of the qualified product through its own comparison module to determine whether the product is qualified for glue overflow. After that, the information of whether the display screen is overflowed with glue is accurately and reliably sent to the connected display for display; S4: After the detection of the upper surface of the display screen is completed, the conveying motor 103 drives the conveyor belt 102 to rotate and continue to convey the display screen to the right. At this time, the right side of the display screen will be just embedded in the fixing opening in the middle of the fixing cylinder 303, while the left side continues to remain on the right side of the upper surface of the conveyor belt 102. Then, the micro air pump 304 generates gas to enter the two extension cylinders 309, so that the extension column 308 at one end of the two extension cylinders 309 simultaneously pushes the limit plate 307 to move close to the upper and lower ends of the display screen due to the action of air pressure, thereby clamping and limiting the display screen; S5: The electric push rod 3 pushes the fixed plate 301 upward, and then the second servo motor 302 drives the fixed cylinder 303 to rotate 180 degrees to turn over the display screen. Then the electric push rod 3 pulls the fixed plate 301 downward to restore the original position, so that the left side of the display screen continues to be closely attached to the upper surface of the conveyor belt 102. The micro air pump 304 extracts the gas in the extension column 308 so that the limit plate 307 returns to its original position and no longer clamps the display screen. S6: The conveying motor 103 drives the conveying belt 102 to rotate and continue to convey the display screen to the left. When the display screen moves to below the CCD lens 206, the back side of the display screen is detected.

[0023] The above are only preferred embodiments of the present invention. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These should also be regarded as the protection scope of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A display screen glue overflow detection device, comprising a workbench (1), a control panel (101), a conveyor belt (102) and a conveying motor (103), wherein the control panel (101) is fixed on the right side of the upper surface of the workbench (1), the conveyor belt (102) is rotatably connected to the left side of the upper surface of the workbench (1) via a bracket and a conveying roller, and the conveying motor (103) is fixed on the support outside the conveyor belt (102), characterized in that: A hydraulic cylinder (201) is vertically fixed below the rear end of the workbench (1); a mounting frame (2) is fixed above the push rod at the output end of the hydraulic cylinder (201); a detection component is arranged above the mounting frame (2); electric push rods (3) are vertically fixed at the front and rear ends of the right side of the bottom of the workbench (1); a fixing plate (301) is fixed to the top of the push rods at the output ends of the two electric push rods (3); and an auxiliary component is arranged above the fixing plate (301).

2. The display screen glue overflow detection device according to claim 1, characterized in that: The detection assembly is composed of a track (202), a mounting plate (203), a connecting plate (204), a support frame (205), a CCD lens (206) and a first servo motor (207); Tracks (202) are transversely fixed at the front and rear ends of the top of the mounting frame (2); a mounting plate (203) is fixed on the upper outer side between the two tracks (202); a connecting plate (204) is embedded inside the mounting plate (203); the top of the connecting plate (204) is rotatably connected to a support frame (205) via a shaft; a CCD lens (206) is fixed at the lower front end of the support frame (205); and a servo motor (207) is fixed on the right side of the mounting frame (2).

3. The display screen glue overflow detection device according to claim 1 or 2, characterized in that: The left and right sides of the rear end of the workbench (1) are both opened to provide limit openings with a cross-sectional area that is the same size as the mounting frame (2); the top of the push rod at the output end of the hydraulic cylinder (201) is fixedly connected to the mounting frame (2); and the mounting frame (2) is lifted up and down in a vertical direction in the workbench (1).

4. The display screen glue overflow detection device according to claim 2, characterized in that: The connecting disk (204) rotates 180° left and right inside the mounting disk (203), and the left and right ends above the mounting disk (203) are both vertically embedded with limiting screws, and the bottom ends of the limiting screws are tightly attached to the left and right ends above the connecting disk (204).

5. The display screen glue overflow detection device according to claim 2, characterized in that: The top of the mounting frame (2) is connected to a screw rod for transverse rotation, the screw rod is embedded in the bottom of the mounting plate (203) and is connected to the inside of the mounting plate (203) via a thread, the first servo motor (207) is connected to the screw rod for rotation via a chain belt, and the mounting plate (203) slides horizontally left and right between the two tracks (202).

6. The display screen glue overflow detection device according to claim 1, characterized in that: The auxiliary component is composed of a fixing plate (301), a second servo motor (302), a fixing cylinder (303), a micro air pump (304), a limiting rod (306), a limiting plate (307), an extension column (308) and an extension cylinder (309); A fixing plate (301) is vertically fixed to the top of the push rods at the output ends of the two electric push rods (3), a second servo motor (302) is fixed to the top of the fixing plate (301), a fixing cylinder (303) is horizontally embedded in the upper part of the fixing plate (301), a micro air pump (304) is fixed to the middle part of the right side of the fixing cylinder (303), limiting rods (306) are vertically fixed to the left and right sides of the upper and lower ends of the fixing cylinder (303), limiting plates (307) are embedded on the outer sides of the limiting rods (306), and extension columns (308) are vertically fixed to the sides of the two limiting plates (307) away from the middle part of the fixing cylinder (303), and extension cylinders (309) are embedded on the outer sides of the extension columns (308).

7. The display screen glue overflow detection device according to claim 1 or 6, characterized in that: A fixing opening is provided at the middle horizontal opening on the left side of the fixing cylinder (303), the middle of the fixing opening and the middle of the upper surface of the conveyor belt (102) are both on the same horizontal horizontal plane, and the two limiting plates (307) are respectively embedded in the upper and lower ends of the fixing opening, and the two limiting plates (307) are symmetrically arranged around the horizontal center axis of the fixing opening.

8. The display screen glue overflow detection device according to claim 6, characterized in that: The pipes at the inlet and outlet ends of the micro air pump (304) are connected to the inside and outside of the extension tube (309); the outer wall of the extension column (308) is in close contact with the inner wall of the extension tube (309); and the extension column (308) rises and falls vertically in the extension tube (309).

9. The display screen glue overflow detection device according to claim 6, characterized in that: A gear plate having a diameter greater than that of the fixed cylinder (303) is fixed on the right side of the outer wall of the fixed cylinder (303), and the output end of the second servo motor (302) is rotationally connected to the fixed cylinder (303) via the gear and the gear plate.

10. The display screen glue overflow detection device according to claim 1, characterized in that: The specific steps include: S1: Before the detection, the hydraulic cylinder (201) pulls the mounting frame (2) up and down, so that the mounting frame (2) pulls the CCD lens (206) up and down through the track (202), the mounting plate (203), the connecting plate (204), and the support frame (205), and adjusts the distance between the bottom of the CCD lens (206) and the upper surface of the conveyor belt (102). The first servo motor (207) drives the screw rod to rotate at the bottom of the mounting plate (203), so that the mounting plate (203) pulls the CCD lens (206) through the connecting plate (204) and the support frame (205) to move left and right above the conveyor belt (102) to adjust the detection position of the display screen; S2: After the display screen to be inspected is placed on the conveyor belt (102), the conveying motor (103) drives the conveyor belt (102) to rotate via the output roller to convey the display screen to the right, so that the display screen is conveyed to the bottom of the CCD lens (206); S3: The CCD lens (206) sends the captured image information to the control panel (101), and the control panel (101) compares the image information received by the detection with the edge interval image of the qualified product through the comparison module provided therein, and determines whether the product is qualified for glue overflow, and then accurately and reliably sends the information of whether the display screen is glue overflowed to the connected display for display; S4: After the detection of the upper surface of the display screen is completed, the conveying motor (103) drives the conveying belt (102) to rotate and continue to convey the display screen to the right. At this time, the right side of the display screen will be exactly embedded in the fixing opening in the middle of the fixing cylinder (303), while the left side continues to remain on the right side of the upper surface of the conveying belt (102). Then, the micro air pump (304) generates gas to enter the two extension cylinders (309), so that the extension column (308) at one end of the two extension cylinders (309) simultaneously pushes the limit plate (307) to move closely to the upper and lower ends of the display screen due to the action of air pressure, thereby clamping and limiting the display screen; S5: the electric push rod (3) pushes the fixing plate (301) upward, and then the second servo motor (302) drives the fixing cylinder (303) to rotate 180 degrees to turn over the display screen, and then the electric push rod (3) pulls the fixing plate (301) downward to return to its original position, so that the left side of the display screen continues to be closely attached to the upper surface of the conveyor belt (102), and the micro air pump (304) extracts the gas in the extension column (308) so that the limit plate (307) returns to its original position and no longer clamps the display screen; S6: The conveying motor (103) drives the conveying belt (102) to rotate and continue to convey the display screen to the left. When the display screen moves to below the CCD lens (206), the back side of the display screen is detected.

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