CN117589773A - A kind of AOI detection equipment for light guide plate - Google Patents

Abstract

The utility model relates to the technical field of light guide plate detection, and discloses AOI detection equipment of a light guide plate, which comprises a detection platform, a CCD detection camera erected above the detection platform, a lifting cylinder arranged below the detection platform, and a bearing component arranged at the top end of a piston rod of the lifting cylinder and used for bearing a light guide plate body, wherein the bearing component is arranged on the top end of the piston rod of the lifting cylinder; the detection platform is provided with a detection through groove in a penetrating manner, a cleaning part is arranged in the detection platform, and the cleaning part comprises a cleaning groove box arranged in the detection platform, a plurality of gas nozzles and clear water nozzles, wherein the gas nozzles and the clear water nozzles are arranged on the inner walls around the cleaning groove box; the gas nozzles and the clear water nozzles are arranged in a staggered mode, an opening is formed in the top of the cleaning groove box, and a cleaning through groove is formed in the bottom of the cleaning groove box. The application has the effect of improving the effect of dust and impurities on the surface of the light guide plate on the detection of the light guide plate.

Description

A kind of AOI detection equipment for light guide plate

Technical field

The present invention relates to the technical field of light guide plate detection, and in particular, to an AOI detection equipment for light guide plates.

Background technique

The light guide plate is made of optical grade acrylic or PC sheet. The light guide plate is a high-tech material with extremely high reflectivity and no light absorption. The light guide plate needs to be detected by a detection device during the production process; AOI stands for automatic optical inspection. It scans products based on optical principles. First, it reads the image of the inspected part through an industrial camera, and then compares it with the good image through a logical algorithm to find out whether there are products that do not meet the production requirements.

For example, a light guide plate detection device disclosed in the Chinese utility model patent with the authorization announcement number CN209542051U has a load-bearing frame at the upper end of the main body of the device, a shooting camera at the middle of the lower end of the load-bearing frame, and a connecting block at the upper middle of the load-bearing frame. An adjusting cylinder is provided on one side of the block. An adjusting column is provided on the inner side of the adjusting cylinder. A connecting screw hole is provided on the outer surface of the rear end of the adjusting cylinder. A connecting stud is provided on the inner side of the connecting screw hole. The connecting stud is provided on the inner side of the adjusting cylinder. The inner side of the adjusting cylinder at the front end is provided with a fixed plate, the outer surface of the front end of the fixed plate is provided with a rubber plate, and the outer surface of the rear end outer surface of the fixed plate is provided with a connecting bearing on the outer side of the connecting stud.

In view of the above related technologies, the light guide plate detection device detects the light guide plate body. During the transportation process, the surface of the light guide plate body will have dust and impurities. If detected by the CCD detection camera, it can easily be mistaken by the staff for the light guide plate body. An undesirable problem occurs.

Contents of the invention

In order to improve the problem that dust and impurities on the surface of the light guide plate affect the detection of the light guide plate, this application provides an AOI detection equipment for the light guide plate.

This application provides an AOI detection equipment for light guide plates, which adopts the following technical solution:

An AOI detection equipment for light guide plates, including a detection platform, a CCD detection camera installed above the detection platform, a lifting cylinder installed below the detection platform, and a top end of the piston rod of the lifting cylinder to carry the light guide plate body The detection platform is provided with a detection channel throughout, and a cleaning component is provided in the detection platform. The cleaning component includes a cleaning tank box installed in the detection platform, and a plurality of cleaning tanks installed in the detection platform. There are gas nozzles and clean water nozzles on the inner wall around the cleaning tank box; several gas nozzles and several clean water nozzles are staggered, the top of the cleaning tank box is provided with an opening, and the bottom of the cleaning tank box is provided with a cleaning channel.

By adopting the above technical solution, the lifting cylinder pushes the load-bearing platform to move vertically upward. The load-bearing platform is penetrated inside the cleaning tank box through the cleaning channel. Several clean water nozzles are aligned with the surface of the light guide plate body to spray water to achieve clean water. The clean water sprayed from the nozzles has the effect of flushing impurities on the surface of the light guide plate body; after several clean water nozzles have finished spraying water, several gas nozzles are directed at the surface of the light guide plate body to blow air, so that the air flow ejected from the gas nozzles can remove the surface of the light guide plate body. Surface blow-drying effect.

Optionally, the supporting component includes an airflow duct installed on the top of the lifting cylinder, a supporting panel installed on the top of the airflow duct, a plurality of suction cups installed on the top of the supporting panel, and a support panel installed on the top of the supporting panel. A bearing platform above the support panel; the suction cup is connected to the vacuum equipment through the airflow duct, and the light guide plate body is placed on the top of the bearing platform.

By adopting the above technical solution, the vacuum equipment evacuates the gas between the support panel and the load-bearing platform through several suction cups, thereby achieving the effect that the negative pressure between the support panel and the load-bearing platform fixes the load-bearing platform to the support panel.

Optionally, the load-bearing platform is provided with a correction component for correcting the position of the light guide plate body. The correction component includes a plurality of guide straight rods that pass through the periphery of the load-bearing platform and are fixed to the guide straight rods through angle brackets. Correction strips at the end; several correction strips are respectively in contact with the outer wall around the light guide plate body.

By adopting the above technical solution, the guide straight rod drives four correction strips to respectively contact the outer walls around the light guide plate body, thereby achieving the effect of correcting the position of the light guide plate body relative to the bearing platform.

Optionally, the load-bearing platform is provided with a cylindrical cavity, and the load-bearing platform is provided with several synchronization components for synchronous sliding of the guide straight rods. The synchronization components include rotationally installed in the cylindrical cavity. The driving gear in the body and the driving rack fixed on the end of the guide straight rod close to the driving gear; several driving racks are meshed with the driving gear.

By adopting the above technical solution, the rotating drive gear drives the four guide straight rods to retract the bearing platform through the four drive racks, achieving the effect of synchronous sliding of several of the guide straight rods.

Optionally, the load-bearing platform is provided with a driving component for driving the rotation of the driving gear. The driving component includes a spiral sleeve fixed in the cylindrical cavity, and a spiral straight spiral connected to the spiral sleeve. Rod; the spiral straight rod is keyed to the driving gear, the top of the spiral straight rod passes through the bearing platform and is rotationally mounted with a sensing disk, and the light guide plate body is placed on the top of the sensing disk.

By adopting the above technical solution, the light guide plate body presses down the sensing disc, and the sensing disc drives the spiral straight rod to move vertically downward. Due to the spiral arrangement of the spiral straight rod and the spiral sleeve, the spiral straight rod moves vertically downward while causing The spiral straight rod rotates. Due to the key connection between the spiral straight rod and the driving gear, the spiral straight rod drives the driving gear to rotate synchronously. At the same time, the driving gear does not affect the sliding of the spiral straight rod in the vertical direction. In this way, It achieves the effect that the rotating spiral straight rod drives the driving gear to rotate.

Optionally, a reset component is provided inside the spiral sleeve. The reset component includes a return spring provided on the inner bottom surface of the spiral straight rod and the spiral sleeve. The external thread of the spiral straight rod and the spiral The inner thread of the sleeve is spirally set.

By adopting the above technical solution, the light guide plate body is taken out from the top of the bearing platform, and the spiral straight rod moves vertically upward through the action of the return spring. The spiral straight rod drives the driving gear to reverse and reset, so that the driving gear drives several driving racks to return to their original state. Bit.

Optionally, the cleaning tank box is provided with a guide component for sewage diversion. The guide component includes a rubber strap provided on the inner wall of the cleaning channel. The rubber strap is along the cleaning channel. There is a circle around the through-trough, and the rubber strap is arranged inclined from bottom to top in a direction pointing to the center of the cleaning tank box.

By adopting the above technical solution, the rubber straps try to prevent sewage from dripping into the bar box through the cleaning channel or even dripping onto the conveyor belt, thereby minimizing the effect of contamination of the interior of the bar box and the surface of the conveyor belt.

Optionally, a sealing component is provided between the supporting panel and the supporting platform. The sealing component includes a rubber sealing ring installed on the top of the supporting panel. The rubber sealing ring is along the periphery of the supporting panel. The edge of the rubber sealing ring is provided with a circle, and several suction cups are provided on the inner periphery of the rubber sealing ring.

By adopting the above technical solution, the rubber sealing rings around the edges of the supporting panel try to prevent outside air from being sucked into the space between the supporting panel and the supporting platform, thereby achieving the effect of firmly fixing the supporting platform to the supporting panel.

To sum up, this application includes at least one of the following beneficial technical effects:

1. Several clean water nozzles are aimed at the surface of the light guide plate body to spray water, so that the clean water sprayed from the clean water nozzles flushes the impurities on the surface of the light guide plate body; after the water spraying by several clean water nozzles is completed, several gas nozzles are aligned with the light guide plate body. The surface of the light guide plate body is sprayed with air to achieve the effect that the air flow ejected from the gas nozzle can dry the surface of the light guide plate body;

2. The vacuum equipment evacuates the gas between the support panel and the load-bearing platform through the suction cup, so that the negative pressure between the support panel and the load-bearing platform makes the load-bearing platform fixed to the support panel;

3. Due to the spiral setting of the spiral straight rod and the spiral sleeve, the spiral straight rod moves vertically downward while causing the spiral straight rod to rotate. Due to the key connection setting of the spiral straight rod and the driving gear, the spiral straight rod drives the driving gear. While rotating synchronously, the driving gear does not affect the sliding of the spiral straight rod in the vertical direction, thereby achieving the effect that the rotating spiral straight rod drives the driving gear to rotate.

Description of drawings

Figure 1 is a schematic structural diagram of the AOI detection equipment of the light guide plate in the embodiment of the present application.

Figure 2 is a schematic cross-sectional view of the AOI detection equipment of the light guide plate in the embodiment of the present application.

Figure 3 is an exploded schematic diagram of the internal structure of the carrying platform in the embodiment of the present application.

Figure 4 is a schematic structural diagram of the cleaning tank box in the embodiment of the present application.

Figure 5 is a schematic cross-sectional view of the light guide plate body placed inside the cleaning tank box.

Reference signs: 11. Bar-shaped box; 12. Detection platform; 13. Conveying slot; 14. Driving shaft; 15. Driving motor; 16. Conveying components; 17. Pulley; 18. Conveying belt; 19. Carrying platform ; 20. Cylindrical cavity; 21. Spiral sleeve; 22. Spiral straight rod; 23. Driving gear; 24. Return spring; 25. Induction disc; 26. Guide straight rod; 27. Driving rack; 28. Correction strip; 29. Lifting cylinder; 30. Air flow duct; 31. Supporting panel; 32. Rubber sealing ring; 33. Mirror-reflective photoelectric switch; 34. Mirror-reflective plate; 35. Suction cup; 36. Cleaning tank box; 37. Cleaning channel; 38. Rubber strap; 39. Gas nozzle; 40. Clean water nozzle; 41. CCD detection camera; 42. Detection channel.

Detailed ways

The present application will be further described in detail below in conjunction with Figures 1-5.

Referring to Figures 1 and 2, an AOI detection equipment for a light guide plate includes a bar box 11 arranged in a horizontal direction and a detection platform 12 erected on the top of the bar box 11. The bar box 11 and the detection platform 12 They are all provided with cavities, and the top of the bar-shaped box 11 is provided with an opening. The parts where the bar-shaped box 11 and the detection platform 12 are combined are connected and arranged. The two left and right side walls of the detection platform 12 are penetrated by a transport channel 13 . The transport channel 13 is provided at the bottom of the detection platform 12 and communicates with the opening of the strip box 11 . The bar-shaped box 11 is provided with a driving shaft 14 along its width direction. The two ends of the driving shaft 14 are respectively rotatably installed on the left and right inner walls of the bar-shaped box 11 . The driving shaft 14 is along the length direction of the bar-shaped box 11 . There are two sets. A drive motor 15 is fixedly installed on the outer wall of the strip box 11 near its left end.

Referring to FIGS. 1-3 , the output shaft of the drive motor 15 is fixedly connected to one of the drive shafts 14 . The two driving rotating shafts 14 are respectively close to the left and right ends of the strip box 11. A conveying member 16 for conveying the light guide plate body is provided between the two driving rotating shafts 14. The conveying member 16 is provided with two along the length direction of the driving rotating shaft 14. . The conveying component 16 includes two pulleys 17 that are coaxially fixed to the peripheral sides of the driving shaft 14 and a conveying belt 18 that is sleeved on the outer circumference of the two pulleys 17. The light guide plate body is conveyed by the conveying belt 18 and through the conveying channel. 13 is installed on the inner side of the detection platform 12. A load-bearing platform 19 for supporting the light guide plate body is placed on the top of the two conveyor belts 18. A cylindrical cavity 20 is provided on the inside of the load-bearing platform 19, and a spiral sleeve 21 is fixedly installed on the inner bottom surface of the cylindrical cavity 20.

Referring to Figures 1-3, the spiral sleeve 21 is provided with a spiral straight rod 22 in a vertical direction through the opening at the top of the spiral sleeve 21. The spiral straight rod 22 and the spiral sleeve 21 are spirally connected. The external threads of the spiral straight rod 22 and The internal thread of the spiral sleeve 21 is arranged in a spiral manner, and the threads of the spiral straight rod 22 and the spiral sleeve 21 have a larger inclination angle than the threads of a common lead screw. A driving gear 23 is mounted on the inner top surface of the cylindrical cavity 20 for rotation. A return spring 24 is provided between the bottom of the spiral straight rod 22 and the inner bottom surface of the spiral sleeve 21. The top of the spiral straight rod 22 passes through it in a vertical direction. The driving gear 23 is connected with the driving gear 23 by a key, so that while the spiral straight rod 22 drives the driving gear 23 to rotate synchronously, the driving gear 23 does not affect the sliding of the spiral straight rod 22 in the vertical direction. The top of the spiral straight rod 22 passes through the top of the bearing platform 19 and is rotatably mounted with a sensing circular plate 25. The light guide plate body is placed on the top of the sensing circular plate 25. The side walls around the bearing platform 19 are provided with guide straight rods 26.

Referring to Figures 1-3, four guide straight rods 26 are passed through the inside of the cylindrical cavity 20 at their ends close to the driving gear 23. A driving rack 27 is fixedly installed at the end of the guide straight rods 26 close to the driving gear 23. , the end of the guide straight rod 26 away from the driving gear 23 is fixedly installed with a correction strip 28 through an angle frame, and the four driving racks 27 are all meshed with the driving gear 23. The four correction strips 28 are respectively in contact with the outer walls around the light guide plate body, so that the four correction strips 28 can correct the position of the light guide plate body relative to the carrying platform 19 . A lifting cylinder 29 is fixed vertically on the inner bottom surface of the strip box 11. An airflow duct 30 is fixed on the top of the piston rod of the lifting cylinder 29. A supporting panel 31 is fixedly installed on the top of the airflow duct 30 in a horizontal direction. The supporting panel The top of 31 is fixed with a rubber sealing ring 32 along its surrounding edges.

Referring to Figures 2 and 3, a mirror-reflective photoelectric switch 33 is fixed at the center of the bottom of the bearing platform 19, a mirror-reflective plate 34 is fixed at the center of the top of the supporting panel 31, and the mirror-reflective photoelectric switch 33 and the drive motor 15 provide electrical signals. connection, so that when the carrying platform 19 moves to directly above the supporting panel 31 with the help of the conveying belt 18, the mirror-reflective photoelectric switch 33 controls the driving motor 15 to cut off power and stop rotating, so that the conveying belt 18 stops conveying. A plurality of suction cups 35 are fixedly installed on the top of the supporting panel 31. The plurality of suction cups 35 are arranged on the inner periphery of the rubber sealing ring 32. The suction cups 35 are connected to the air flow conduit 30 through the air pipe, and the air flow conduit 30 is connected to the vacuum equipment through the air pipe. A cleaning tank box 36 is fixedly installed on the inner side of the detection platform 12 , and the cleaning tank box 36 is disposed directly above the supporting panel 31 .

Referring to Figures 2, 4 and 5, the top of the cleaning tank box 36 is provided with an opening and the bottom of the cleaning tank box 36 is provided with a cleaning channel 37. A ring of rubber straps 38 is fixed on the inner wall of the cleaning channel 37, and several rubber straps 38 are fixed on the inner wall of the cleaning channel 37. The rubber strip 38 is inclined from bottom to top in a direction pointing to the center of the cleaning tank box 36 . A gas nozzle 39 and a clean water nozzle 40 are fixed on the inner wall of the top of the cleaning tank box 36. There are several clean water nozzles 40 located on the inner wall around the cleaning tank box 36. The gas nozzle 39 is located between two adjacent clean water nozzles 40. one. A CCD detection camera 41 is fixedly installed on the top of the detection platform 12 through a gantry, and the CCD detection camera 41 is disposed directly above the supporting panel 31 . A detection through-slot 42 is provided through the top of the detection platform 12 , and the detection through-slot 42 is disposed directly above the supporting panel 31 .

The implementation principle of a light guide plate AOI detection device disclosed in the embodiment of the present application is as follows: the light guide plate body is placed on the top of the bearing platform 19, the light guide plate body presses down the sensing disc 25 through its own gravity, and the sensing disc 25 drives the The spiral straight rod 22 moves vertically downward. Since the spiral straight rod 22 and the spiral sleeve 21 are spirally arranged, the spiral straight rod 22 moves vertically downward while causing the spiral straight rod 22 to rotate. Since the spiral straight rod 22 and the driving gear 23 are keyed together, the rotating spiral straight rod 22 drives the driving gear 23 to rotate, and the rotating driving gear 23 drives the four guide straight rods 26 to retract the bearing platform 19 through the four driving racks 27. The guide straight rod 26 drives the four correction strips 28 to respectively contact the outer walls around the light guide plate body, thereby achieving the effect of correcting the position of the light guide plate body relative to the carrying platform 19 .

The carrying platform 19 is placed on the top of the two conveyor belts. The carrying platform 19 slides through the conveying channel 13 to the inside of the detection platform 12 with the help of the conveying belt, until the mirror-reflective photoelectric switch 33 at the bottom of the carrying platform 19 senses the supporting panel. The mirror-reflective plate 34 on the top of 31 and the mirror-reflective photoelectric switch 33 control the drive motor 15 to cut off power and control the conveyor belt 18 to stop conveying. At this time, the bearing platform 19 is conveyed to just above the supporting panel 31. The lifting cylinder 29 drives the supporting panel 31 and the supporting platform 19 to contact each other. The vacuum equipment evacuates the gas between the supporting panel 31 and the supporting platform 19 through several suction cups 35. The rubber sealing rings 32 around the edges of the supporting panel 31 should be avoided as much as possible. The outside air is sucked into the space between the supporting panel 31 and the supporting platform 19 , and the negative pressure between the supporting panel 31 and the supporting platform 19 makes the supporting platform 19 fixed to the supporting panel 31 .

The lifting cylinder 29 continues to push the bearing platform 19 to move vertically upward. The bearing platform 19 passes through the rubber strap 38 and is inserted into the inside of the cleaning tank box 36 through the cleaning channel 37. Several clean water nozzles 40 are aligned with the surface of the light guide plate body. Water is sprayed, and the clean water on the surface of the light guide plate body drives the impurities on the surface of the light guide plate body to flow into the inner bottom surface of the cleaning tank box 36 . The sewage dripping onto the surface of the inclined rubber strap 38 can be guided by the rubber strap 38 to the cleaning tank box 36 inner bottom surface. At this time, the rubber strap 38 tries to prevent sewage from dripping to the bar box 11 through the cleaning channel 37 or even dripping to the conveyor belt 18, causing the inside of the bar box 11 and the surface of the conveyor belt 18 to be contaminated. After several clean water nozzles 40 finish spraying water, several gas nozzles 39 are directed at the surface of the light guide plate body to blow air, thereby achieving the effect that the air flow ejected from the gas nozzles 39 can dry the surface of the light guide plate body. The lifting cylinder 29 continues to push the bearing platform 19 to move vertically upward and penetrates the top of the detection platform 12 through the detection slot 42. At this time, the CCD detection camera 41 starts to detect the light guide plate body.

The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application shall be covered by the scope of protection of the present application. Inside.

Claims (8)

1. The AOI detection equipment for the light guide plate comprises a detection platform (12), a CCD detection camera (41) erected above the detection platform (12), a lifting cylinder (29) arranged below the detection platform (12), and a bearing component arranged at the top end of a piston rod of the lifting cylinder (29) for bearing the light guide plate body; the detection platform (12) is provided with a detection through groove (42) in a penetrating mode, and is characterized in that: the detection platform (12) is internally provided with a cleaning component, and the cleaning component comprises a cleaning groove box (36) arranged in the detection platform (12), a plurality of gas nozzles (39) and clear water nozzles (40) arranged on the inner wall around the cleaning groove box (36); the gas nozzles (39) and the clear water nozzles (40) are arranged in a staggered mode, an opening is formed in the top of the cleaning groove box (36), and a cleaning through groove (37) is formed in the bottom of the cleaning groove box (36).

2. An AOI inspection apparatus for a light guide plate according to claim 1, wherein: the bearing component comprises an air flow conduit (30) arranged at the top end of the lifting air cylinder (29), a bearing panel (31) arranged at the top end of the air flow conduit (30), a plurality of suckers (35) arranged at the top of the bearing panel (31) and a bearing platform (19) arranged above the bearing panel (31); the sucker (35) is communicated with the vacuum equipment through the air flow conduit (30), and the light guide plate body is arranged at the top of the bearing platform (19).

3. An AOI inspection apparatus for a light guide plate according to claim 2, wherein: the light guide plate comprises a bearing platform (19), wherein a correcting part for correcting the position of a light guide plate body is arranged in the bearing platform (19), and comprises a plurality of guide straight rods (26) penetrating through the periphery of the bearing platform (19) and correcting laths (28) fixed at the end parts of the guide straight rods (26) through angle folding frames; the plurality of correcting slats (28) are respectively abutted against the outer walls around the light guide plate body.

4. An AOI inspection apparatus for a light guide plate according to claim 3, wherein: a cylindrical cavity (20) is arranged in the bearing platform (19), a plurality of synchronous components for synchronously sliding the guide straight rods (26) are arranged in the bearing platform (19), and each synchronous component comprises a driving gear (23) rotatably arranged in the cylindrical cavity (20) and a driving rack (27) fixed at the end part, close to the driving gear (23), of the guide straight rod (26); the driving racks (27) are meshed with the driving gears (23).

5. The AOI inspection apparatus for light guide plate according to claim 4, wherein: a driving part for driving the driving gear (23) to rotate is arranged in the bearing platform (19), and comprises a spiral sleeve (21) fixed in the cylindrical cavity (20) and a spiral straight rod (22) spirally connected in the spiral sleeve (21); the spiral straight rod (22) is connected with the driving gear (23) through a key, the top end of the spiral straight rod (22) penetrates through the bearing platform (19) and is rotatably provided with the sensing circular plate (25), and the light guide plate body is arranged at the top of the sensing circular plate (25).

6. An AOI inspection apparatus for a light guide plate according to claim 5, wherein: the screw sleeve (21) is internally provided with a reset part, the reset part comprises a reset spring (24) arranged on the inner bottom surface of the screw rod (22) and the screw sleeve (21), and the external threads of the screw rod (22) and the internal threads of the screw sleeve (21) are spirally arranged.

7. An AOI inspection apparatus for a light guide plate according to claim 1, wherein: the sewage water flow guiding device is characterized in that a flow guiding component for sewage water flow guiding is arranged in the cleaning groove box (36), the flow guiding component comprises rubber strips (38) arranged on the inner groove wall of the cleaning through groove (37), the periphery of the cleaning through groove (37) is provided with a circle of rubber strips (38), and the rubber strips (38) are obliquely arranged from bottom to top along the direction pointing to the center of the cleaning groove box (36).

8. An AOI inspection apparatus for a light guide plate according to claim 2, wherein: the bearing panel (31) with be equipped with sealing member between loading platform (19), sealing member including install in rubber seal (32) at bearing panel (31) top, rubber seal (32) are followed bearing panel (31) peripheral edge is equipped with the round, and a plurality of sucking disc (35) are located the inner periphery of rubber seal (32).