An arc edge defect detection device for a mobile phone glass cover plate

Abstract

The application relates to the technical field of optical detection, and discloses an arc edge defect detection device for a mobile phone glass cover plate, which solves the problems that the existing mobile phone glass cover plate detection device has great difficulty in adjusting the angles of light sources and cameras, has high professional requirements, and has many light sources and cameras, and has high manufacturing cost when detecting different types of cover plates. Through cooperation of the first clamping roller, the second clamping roller and the guide rail, the facing area of the cover plate placed on the adjusting mold table is adjusted, each part of the surface of the cover plate has the opportunity to face the lens of the fixed camera, a group of cameras can clearly shoot the whole cover plate, the number of cameras used is reduced, cost is saved, different types of cover plates can be detected, the corresponding measuring seat mechanism can be replaced, the complex link of adjusting the angles of light sources and cameras is omitted, and the operation difficulty and the professionalism when detecting different types of cover plates are greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of optical inspection technology, specifically to a device for detecting arc edge defects in mobile phone glass covers. Background Technology

[0002] Mobile phone glass covers with curved edges come in models including 2.5D and 3.0D, and are formed through a hot bending process. After forming, the curved edges require defect inspection, including checks for scratches, chipping, and indentations, to ensure a high yield rate for the mobile phone glass covers. Common inspection devices include machine vision inspection systems, which use the selection and combination of light sources and cameras to detect defects in the mobile phone glass covers.

[0003] In actual testing, existing testing equipment typically divides the surface of 2.5D and 3.0D mobile phone glass covers into a central flat section (the section with smaller curvature in the center of a 3.0D mobile phone glass cover is also classified as a flat section) and two curved sections (i.e., arc edges), and then tests these two sections separately. Due to the greater curvature of the curved sections, the testing difficulty increases significantly. To effectively test the curved sections, the angles of the light source and camera must be precisely adjusted to accommodate mobile phone glass covers with different arc edge curvatures. This adjustment is not only difficult but also requires a high level of professional skill from the operators.

[0004] Therefore, in existing testing equipment, inspecting 2.5D and 3.0D mobile phone glass covers with different curvatures faces challenges due to the difficulty in adjusting the light source and camera angles, and the high level of expertise required. Furthermore, the need to set up separate light sources and cameras for different surfaces of the mobile phone glass cover results in a large number of light sources and cameras, significantly increasing the manufacturing cost of the testing equipment. This situation not only increases production costs but also limits the improvement of testing efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a device for detecting arc edge defects in mobile phone glass covers, which solves the problems of existing mobile phone glass cover detection devices, such as the difficulty in adjusting the angle of the light source and camera, the high professional requirements, and the large number of light sources and cameras used, resulting in high manufacturing costs when detecting different types of covers.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for detecting arc edge defects in mobile phone glass covers, comprising: an operating table, wherein a camera is mounted on the upper side of the operating table via a gantry frame, and lighting lamps are provided on both sides of the camera; The measuring base mechanism includes a mold table for placing a cover plate. Guide rails are provided on both sides of the mold table. The curvature of the upper surface of the guide rails is consistent with the curvature of the upper surface of the cover plate along the width direction and is horizontally parallel. The feeding mechanism has two symmetrically arranged on both sides of the measuring base mechanism. The feeding mechanism includes clamping roller one and clamping roller two for clamping the guide rail. A U-shaped assembly plate is provided on the upper side of the operating table. Clamping roller one and clamping roller two are assembled on one side of the U-shaped assembly plate. A driving component is assembled on the operating table. By rotating clamping roller one through the driving component, the guide rail is moved, forcing the cover plate on the upper surface of the mold table to pass under the camera along the width direction of the cover plate. The vertically downward shooting area of ​​the camera is perpendicular to the corresponding part of the moving cover plate surface.

[0007] As a further description of the above technical solution: the clamping roller one is rotatably mounted on one side of the U-shaped assembly plate via a drive rod one that is coaxially fixedly connected. One end of the drive rod one is connected to a drive assembly that drives the drive rod one to rotate. An extrusion assembly is provided on the inner side of the U-shaped assembly plate and below the drive rod one. The clamping roller two is rotatably mounted on one side of the extrusion assembly. The extrusion assembly pushes the clamping roller two upward to cooperate with the clamping roller one to clamp the guide rail.

[0008] As a further description of the above technical solution: the extrusion assembly includes a slider that slides vertically inside the U-shaped assembly plate, a clamping roller is rotatably disposed on one side of the slider via a rotating shaft, a guide groove is provided on the side surface of the U-shaped assembly plate for the rotating shaft to move up and down, a push spring is provided on the lower side of the slider to push the slider, the lower end of the push spring is connected to a threaded column through a base, the lower end of the threaded column is connected to an adjustment knob, and the bottom side of the U-shaped assembly plate is threadedly connected to the threaded column.

[0009] As a further description of the above technical solution: the mold table and the guide rail are fixedly connected by a skeleton, the guide rail includes a detection part adapted to the width direction of the cover plate, and horizontal parts are provided on both sides of the detection part, one end of the horizontal part and one end of the detection part are fixedly connected by a connecting part.

[0010] As a further description of the above technical solution: there are two detection units, which are symmetrically arranged from top to bottom. One end of the two horizontal parts on the same side of the two detection units is fixedly connected by a flipping part. There are two mold platforms, which are symmetrically arranged from top to bottom. The two mold platforms correspond one-to-one with the two detection units.

[0011] As a further description of the above technical solution: a laser sensor is mounted on one side of the U-shaped assembly plate, and a reflector that cooperates with the laser sensor is mounted on the other side of the U-shaped assembly plate. Calibration holes are opened on the surfaces of both U-shaped assembly plates, and the light signal emitted from the output end of the laser sensor passes through the two calibration holes. A calibration ring is provided at each end of the inner side of the frame, and the two calibration rings are symmetrical at both ends of the frame. A small hole is provided in the middle of the calibration ring for the light signal to pass through.

[0012] As a further description of the above technical solution: the mold platform is provided with multiple suction holes, and a rubber film is provided on the lower surface of the mold platform. The rubber film covers the lower side of the multiple suction holes, and a magnetic block is fixedly pasted on the surface of the rubber film. The magnetic blocks assembled on the two mold platforms are mutually attractive.

[0013] As a further description of the above technical solution: a plate changing mechanism is used to place the cover plate on the mold table. The plate changing mechanism includes an outer cover, and a suction cup for adsorbing the cover plate is installed on the lower side of the outer cover. It is also equipped with an electromagnet for attracting the magnetic block to approach.

[0014] As a further description of the above technical solution: the driving component includes a motor, the output end of the motor is connected to a driving rod four via a bevel gear, the two ends of the driving rod four are respectively connected to driving rod two and driving rod three via corresponding bevel gears, and the upper ends of driving rod two and driving rod three drive the driving rod one on both sides of the measuring base mechanism to rotate via bevel gears.

[0015] As a further description of the above technical solution: the guide rail and the frame are made of titanium alloy, and the mold platform is made of lightweight material.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. By cooperating with clamping rollers one and two and the guide rail, the facing area of ​​the cover plate placed on the adjustment mold platform is adjusted so that every part of the cover plate surface has the opportunity to face the lens of the fixed camera. This allows a clear image of the entire cover plate to be taken with a single set of cameras, meeting the shooting requirements while reducing the number of cameras used and saving costs. To test different models of cover plates, the corresponding measuring base mechanism can be replaced, eliminating the complex steps of adjusting the light source and camera angle, and greatly reducing the operational difficulty and professionalism required when testing different models of cover plates.

[0017] 2. By setting up the flipping part, the lower detection part and the mold table can be directly adjusted to the upper side by continuing to rotate the clamping roller one, so as to deal with the detection of the next cover plate. This saves the time that clamping roller one and clamping roller two need to return to the initial position, thereby further improving the detection efficiency of the cover plate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view schematic diagram of the measuring base mechanism and the feeding mechanism of the present invention; Figure 3 This is a schematic diagram of the drive component structure of the present invention; Figure 4 This is a rear view schematic diagram of the measuring base mechanism and the feeding mechanism of the present invention; Figure 5This is a schematic diagram of the feeding mechanism structure of the present invention; Figure 6 This is a schematic diagram of the measuring base mechanism of the present invention; Figure 7 This is a schematic diagram of the internal structure of the measuring base mechanism of the present invention; Figure 8 This is a schematic diagram of the initial state of the clamping roller 1, clamping roller 2, guide rail, and camera of the present invention; Figure 9 This is a schematic diagram of the working states of the clamping roller 1, clamping roller 2, guide rail, and camera of the present invention. Figure 10 For the present invention Figure 9 Enlarged diagram of A in the middle; Figure 11 This is a schematic diagram of the guide rail structure of the present invention; Figure 12 This is a schematic diagram illustrating the process of different models of cover plates of the present invention being photographed by a camera.

[0019] In the diagram: 10. Operating table; 11. Camera; 12. Lighting lamp; 20. Measuring mechanism; 21. Mold table; 211. Suction hole; 212. Rubber diaphragm; 213. Magnetic block; 214. Marker; 22. Frame; 23. Guide rail; 231. Detection section; 232. Connecting section; 233. Horizontal section; 234. Flipping section; 24. Calibration ring; 30. Feeding mechanism; 31. U-shaped assembly plate; 311. Guide groove; 312. Calibration hole; 32. 321. Clamping roller 1; 33. Clamping roller 2; 34. Extrusion assembly; 341. Slider; 342. Push spring; 343. Base; 344. Threaded column; 345. Adjustment knob; 35. Drive assembly; 351. Drive rod 2; 352. Drive rod 3; 353. Drive rod 4; 354. Motor; 36. Laser sensor; 361. Reflector; 40. Plate changing mechanism; 41. Outer cover; 42. Electromagnet; 43. Suction cup. Detailed Implementation

[0020] 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.

[0021] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0022] Combination Figures 1-12A device for detecting arc edge defects in mobile phone glass covers includes: an operating table 10, a camera 11 mounted on the upper side of the operating table 10 via a gantry frame, and lighting lamps 12 on both sides of the camera 11. The measuring base mechanism 20 includes a mold table 21 for placing the cover plate. The mold table 21 is provided with guide rails 23 on both sides. The curvature of the upper surface of the guide rails 23 is consistent with the curvature of the upper surface of the cover plate along the width direction and is horizontally parallel. The feeding mechanism 30 has two symmetrically arranged on both sides of the measuring base mechanism 20. The feeding mechanism 30 includes a clamping roller 32 and a clamping roller 33 for clamping the guide rail 23. A U-shaped assembly plate 31 is provided on the upper side of the operating table 10. The clamping roller 32 and the clamping roller 33 are assembled on one side of the U-shaped assembly plate 31. The clamping roller 32, the clamping roller 33 and the camera 11 are in the same vertical plane. By rotating the clamping roller 32, the guide rail 23 is moved, which forces the cover plate on the upper surface of the mold table 21 to pass under the camera 11 along the width direction of the cover plate. The vertical shooting area of ​​the camera 11 is perpendicular to the corresponding part of the moving cover plate surface.

[0023] Specifically, when the clamping roller 32 and the clamping roller 33 tightly clamp the surface of the guide rail 23, the tangent at the contact point of the clamping roller 32 and the guide rail 23 will remain parallel to the tangent at the contact point of the clamping roller 33 and the guide rail 23 (e.g., Figure 9 , Figure 10 As shown by the horizontal dashed line, when the clamping roller 32 rotates, it will move the guide rail 23 to one side through friction. During the movement of the guide rail 23, the tangents of the contact parts of the clamping rollers 32 and 33 with the guide rail 23 always remain parallel. The upper surface of the guide rail 23 also remains horizontally parallel to the surface of the cover plate along its width. The vertically downward shooting direction of the camera 11 is perpendicular to the corresponding surface of the cover plate, that is, perpendicular to the two tangents mentioned above (e.g., ...). Figure 9 , Figure 10 As shown by the vertical dotted line in the middle, the vertically downward shooting area of ​​camera 11 is perpendicular to the tangent of the curvature of the corresponding surface of the cover plate. In this case, the light from the lamp 12 shining on the surface of the cover plate below camera 11 can be fully reflected onto the lens of camera 11, allowing camera 11 to clearly capture the surface corresponding to the cover plate below. When the guide rail 23 is moved by rotating the clamping roller 32, the cover plate will also move accordingly, allowing the cover plate to pass under camera 11 along its own width direction (as shown by the vertical dotted line in the middle). Figure 12 As shown), the tangent corresponding to the arc surface below the camera 11 will automatically be corrected to be horizontal (because the clamping rollers 32 and 33 tightly clamp the guide rail 23, and the two tangents of the contact surface always remain horizontal, so the cover plate is driven and the corresponding part of the surface will also be automatically corrected to be horizontal), so that the downward shooting camera 11 can take a clear picture of the corresponding surface of the cover plate. As the cover passes under the camera 11, the camera 11 will take multiple pictures to generate clear images of different parts. Through these multiple images, defects on the overall surface of the cover can be effectively detected. To deal with different models of cover plates, only the corresponding measuring base mechanism 20 needs to be replaced. Compared with the existing operation of finely adjusting the detection angle of the camera 11 and the light lamp 12 to adapt to different curvatures of the arc edge, this greatly reduces the difficulty of operation and professional requirements, making the device easy to use. For the overall inspection of the cover plate, only one set of cameras 11 is needed, instead of setting multiple sets for different areas of the cover plate surface, which greatly saves cost investment. It should be noted that when clamping roller 1 32 and clamping roller 2 33 are tightly clamped on the side of the guide rail 23 near the arc edge of the cover plate, the weight of the measuring base mechanism 20 will be biased to one side with clamping roller 1 32 and clamping roller 2 33 as the center. This will cause the tangent of the part of the guide rail 23 where clamping roller 1 32 and clamping roller 2 33 clamps to be slightly tilted. This tilt error is within the allowable range for vertical shooting by camera 11 and will not affect the camera 11 from clearly shooting the corresponding area of ​​the cover plate surface. The downward shooting range of camera 11 is shaped like a frustum. The reason why existing cameras 11 have difficulty shooting the curved edge of the cover plate is that the curved edge of the cover plate has a large curvature, and some surfaces are difficult to reflect the light from the lighting lamp 12 onto the lens of camera 11, resulting in high shooting difficulty and poor image quality. This solution adjusts the facing area of ​​the curved edge of the cover plate so that each part of the curved edge has the opportunity to face the lens of camera 11, thereby achieving clear shooting of the entire surface of the cover plate, without the need for multiple sets of cameras 11, thus saving costs.

[0024] Combination Figures 2-6 The clamping roller 32 is rotatably mounted on one side of the U-shaped assembly plate 31 via a coaxially fixed drive rod 321. One end of the drive rod 321 is connected to a drive assembly 35 that drives the drive rod 321 to rotate. An extrusion assembly 34 is provided on the inner side of the U-shaped assembly plate 31 and below the drive rod 321. The clamping roller 33 is rotatably mounted on one side of the extrusion assembly 34. The extrusion assembly 34 pushes the clamping roller 33 upward to cooperate with the clamping roller 32 to clamp the guide rail 23.

[0025] Drive assembly 35 includes drive lever 2 351, drive lever 352, drive lever 4 353, and motor 354, such as Figure 2 , Figure 3As shown, the output end of motor 354 drives drive rod 4 353 to rotate via bevel gear. The two ends of drive rod 4 353 then drive drive rod 2 351 and drive rod 352 to rotate synchronously via corresponding bevel gears. The upper ends of drive rod 2 351 and drive rod 352 then drive drive rod 1 321 on both sides of the measuring base mechanism 20 to rotate via bevel gears, so that the clamping rollers 1 32 on both sides of the measuring base mechanism 20 are synchronously controlled, thereby facilitating the stable transmission of the measuring base mechanism 20 in the preset direction.

[0026] The extrusion assembly 34 includes a slider 341 that slides vertically inside the U-shaped assembly plate 31. A clamping roller 33 is rotatably mounted on one side of the slider 341 via a rotating shaft. A guide groove 311 for the rotating shaft to move up and down is provided on the side surface of the U-shaped assembly plate 31. A push spring 342 is provided on the lower side of the slider 341 to push the slider 341. The lower end of the push spring 342 is connected to a threaded post 344 via a base 343. An adjustment knob 345 is connected to the lower end of the threaded post 344. The bottom side of the U-shaped assembly plate 31 is threadedly connected to the threaded post 344. The bottom side of the U-shaped assembly plate 31 is also provided with a locking structure (not shown in the figure) to lock the position of the threaded post 344, which is equivalent to the locking function of the guide rail clamp, so that after the position of the base 343 is adjusted, the position of the threaded post 344 is locked.

[0027] Specifically, the height of the base 343 is adjusted by rotating the threaded column 344 using the adjustment knob 345 (the rotation of the adjustment knob 345 can be accomplished with the aid of an auxiliary tool, such as a wrench). When the base 343 is adjusted upward, the push spring 342 is compressed, and the push spring 342 elastically pushes the slider 341 upward, causing the clamping roller 2 33 to cooperate with the clamping roller 1 32 to form a tight clamp on the guide rail 23 (in the initial state, if the level of the guide rail 23 is insufficient, the base 343 should be adjusted upward to increase the clamping force between the clamping roller 1 32 and the clamping roller 2 33, forcing the level of the guide rail 23 to be within the error range). When the base 343 is adjusted downward, the push spring 342 first returns to its natural length, and then the upper end of the push spring 342 pulls the slider 341 downward, causing the clamping roller 1 32 to separate from the clamping roller 2 33. At this time, it is convenient to replace the measuring seat mechanism 20 between the two U-shaped assembly plates 31.

[0028] Combination Figures 2-11 The mold table 21 and the guide rail 23 are fixedly connected by the frame 22. The guide rail 23 includes a detection part 231 adapted to the width direction of the cover plate (the shape of the detection part 231 is set according to the model of the cover plate). Horizontal parts 233 are provided on both sides of the detection part 231. One end of the horizontal part 233 is fixedly connected to one end of the detection part 231 through the connecting part 232.

[0029] Specifically, clamping roller 1 32 and clamping roller 2 33 are initially clamped at the horizontal part 233. When clamping roller 1 32 and clamping roller 2 33 clamp the horizontal part 233, the guide rail 23 as a whole tends to be horizontal, and the mold table 21 also tends to be horizontal. The horizontality of the mold table 21 can be directly observed, so that during the replacement of the measuring seat mechanism 20, it can be directly understood whether the clamping force of clamping roller 1 32 and clamping roller 2 33 on the guide rail 23 is sufficient to adjust the horizontality of the mold table 21 to be horizontal, so as to make adaptive adjustments. The setting of the connecting part 232 facilitates a smooth transition when clamping roller 1 32 and clamping roller 2 33 move between the detection part 231 and the horizontal part 233. The setting of the detection part 231 is to cooperate with clamping roller 1 32 and clamping roller 2 33 to make the cover plate placed on the mold table 21 move along the preset path, so that the camera 11 can clearly photograph the cover plate.

[0030] There are two detection units 231, which are symmetrically arranged in the upper and lower positions. One end of the two horizontal parts 233 on the same side of the two detection units 231 is fixedly connected by the flipping part 234. There are two mold tables 21, which are symmetrically arranged in the upper and lower positions. The two mold tables 21 correspond one-to-one with the two detection units 231.

[0031] Specifically, clamping roller 1 32 and clamping roller 2 33 move from one side horizontal section 233 to the other side horizontal section 233 via detection section 231, so that camera 11 can complete the shooting and detection of the corresponding cover plate. Then, by setting the flipping section 234, clamping roller 1 32 is controlled to continue rotating, which can directly adjust the detection section 231 on the lower side and the mold table 21 on the lower side to the upper side to deal with the detection of the next cover plate. This saves the time of controlling clamping roller 1 32 and clamping roller 2 33 to return to the initial position, thus improving the detection efficiency of the cover plate.

[0032] Combination Figures 2-6 A laser sensor 36 is mounted on one side of the U-shaped mounting plate 31, and a reflector 361 that cooperates with the laser sensor 36 is mounted on the other side of the U-shaped mounting plate 31. Calibration holes 312 are opened on the surface of both U-shaped mounting plates 31. The light signal emitted from the output end of the laser sensor 36 passes through the two calibration holes 312. A calibration ring 24 is provided at each end of the inner side of the frame 22. The two calibration rings 24 are symmetrical at both ends of the frame 22. A small hole is provided in the middle of the calibration ring 24 for the light signal to pass through.

[0033] Specifically, when clamping rollers 32 and 33 are clamped at one end of guide rail 23, making guide rail 23 horizontal in its initial state, the light signal emitted from the output end of laser sensor 36 passes through the calibration ring 24 at the other end of guide rail 23 and is projected onto reflector 361. When guide rail 23 is not horizontal enough, calibration ring 24 will block the light signal output by laser sensor 36, preventing it from reaching reflector 361. This provides information that guide rail 23 is not horizontal enough. Subsequently, an external alarm device (such as an audible and visual alarm device) can be used to remind the user to calibrate the clamping force of clamping rollers 32 and 33 on guide rail 23, so that the horizontality of guide rail 23 is restored to the preset range. This prevents insufficient clamping force of clamping rollers 32 and 33 on guide rail 23, which could cause the cover plate to tilt excessively and affect the clear shooting effect of camera 11 on the surface of the cover plate.

[0034] Combination Figures 6-7 The mold 21 has multiple suction holes 211. The lower surface of the mold 21 is provided with a rubber membrane 212, which covers the lower side of the multiple suction holes 211. A magnetic block 213 is fixedly attached to the surface of the rubber membrane 212. The magnetic blocks 213 assembled on the two mold 21 are mutually attractive.

[0035] The plate-changing mechanism 40 is used to place the cover plate on the mold table 21. The plate-changing mechanism 40 includes an outer cover 41, on the lower side of which is fitted a suction cup 43 for adsorbing the cover plate, and an electromagnet 42 for attracting the magnetic blocks 213 closer. The suction cup 43 is connected to an external air circuit system (equivalent to an air circuit system that controls the extension and retraction of a cylinder). The pressure change on the lower side of the suction cup 43 is used to adsorb and release the cover plate to transfer it. The electromagnet 42 is controlled by a control module, so that the direction of the magnetic pole is changed by changing the direction of the current, so that the electromagnet 42 can attract the magnetic blocks 213 on both mold tables 21 (since the two magnetic blocks 213, which are in an upper and lower relationship, are in a state of mutual attraction, the magnetic poles on the side that are far away from each other are opposite, so the direction of the lower magnetic pole of the electromagnet 42 needs to be adjustable to attract both magnetic blocks 213).

[0036] Specifically, when the cover plate is placed on the upper surface of the mold table 21 by the plate changing mechanism 40, the electromagnet 42 will attract the magnetic block 213 closer. The attraction force of the electromagnet 42 on the adjacent magnetic block 213 is greater than the attraction force between the magnetic block 213 and another magnetic block 213 below. After the cover plate is placed and the plate changing mechanism 40 is removed, the two corresponding magnetic blocks 213 on the upper and lower sides will attract each other closer, thereby pulling the surface of the rubber membrane 212 and generating negative pressure in the suction hole 211, so as to firmly attach the cover plate to the surface of the mold table 21, making it convenient for the cover plate to move with the mold table 21 and preventing it from falling off the surface of the mold table 21.

[0037] The upper surface of the mold platform 21 is provided with a mark 214, which corresponds to the magnetic pole on the upper side of the magnetic block 213 assembled on the mold platform 21, so as to facilitate the debugging of the device later.

[0038] The guide rail 23 and frame 22 are made of titanium alloy. Titanium alloy is lightweight and has high hardness, which provides rigidity to the guide rail 23 while reducing the overall weight of the measuring mechanism 20. The mold table 21 is made of lightweight materials, such as lightweight plastic and carbon fiber, further reducing the overall weight of the measuring mechanism 20. By reducing the overall weight of the measuring mechanism 20, the weight that the clamping rollers 32 and 33 need to overcome when clamping the measuring mechanism 20 on one side is reduced, thus reducing the bias error of the measuring mechanism 20 caused by the bias weight on one side, and further improving the clear imaging effect of the camera 11 on the surface of the cover plate in conjunction with the measuring mechanism 20.

[0039] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for detecting arc edge defects in mobile phone glass covers, characterized in that, include: An operating table (10) is provided, and a camera (11) is mounted on the upper side of the operating table (10) via a gantry frame. Lights (12) are provided on both sides of the camera (11). The measuring base mechanism (20) includes a mold platform (21) for placing the cover plate. The mold platform (21) is provided with guide rails (23) on both sides. The curvature of the upper surface of the guide rails (23) is consistent with the curvature of the upper surface of the cover plate along the width direction and is horizontally parallel. The feeding mechanism (30) has two symmetrically arranged on both sides of the measuring base mechanism (20). The feeding mechanism (30) includes a clamping roller 1 (32) and a clamping roller 2 (33) for clamping the guide rail (23). A U-shaped assembly plate (31) is provided on the upper side of the operating table (10). The clamping roller 1 (32) and the clamping roller 2 (33) are assembled on one side of the U-shaped assembly plate (31). The clamping roller 1 (32), the clamping roller 2 (33), and the camera (11) are on the same vertical plane. A drive assembly (35) is assembled on the operating table (10). By rotating the clamping roller 1 (32) through the drive assembly (35), the guide rail (23) is moved, forcing the cover plate on the upper surface of the mold table (21) to pass under the camera (11) along the width direction of the cover plate. The shooting area of ​​the camera (11) vertically downward is perpendicular to the corresponding part of the moving cover plate surface. The clamping roller 1 (32) is rotatably mounted on one side of the U-shaped assembly plate (31) via a coaxially fixed drive rod 1 (321). One end of the drive rod 1 (321) is connected to a drive assembly (35) that drives the drive rod 1 (321) to rotate. An extrusion assembly (34) is provided on the inner side of the U-shaped assembly plate (31) and below the drive rod 1 (321). The clamping roller 2 (33) is rotatably mounted on one side of the extrusion assembly (34). The extrusion assembly (34) pushes the clamping roller 2 (33) upward to cooperate with the clamping roller 1 (32) to clamp the guide rail (23). The extrusion assembly (34) includes a slider (341) that slides vertically inside the U-shaped assembly plate (31). The clamping roller (33) is rotatably mounted on one side of the slider (341) via a rotating shaft. A guide groove (311) is provided on the side surface of the U-shaped assembly plate (31) for the rotating shaft to move up and down. A push spring (342) is provided on the lower side of the slider (341) to push the slider (341). The lower end of the push spring (342) is connected to a threaded column (344) via a base (343). An adjustment knob (345) is connected to the lower end of the threaded column (344). The bottom side of the U-shaped assembly plate (31) is threadedly connected to the threaded column (344). The mold platform (21) and the guide rail (23) are fixedly connected by a frame (22). The guide rail (23) includes a detection part (231) adapted to the width direction of the cover plate. The detection part (231) is provided with horizontal parts (233) on both sides. One end of the horizontal part (233) is fixedly connected to one end of the detection part (231) through a connecting part (232). Two detection units (231) are provided, which are symmetrical about the top and bottom. The two horizontal parts (233) on the same side of the two detection units (231) are fixedly connected at one end by a flipping part (234). Two mold tables (21) are provided, which are symmetrical about the top and bottom. The two mold tables (21) correspond one-to-one with the two detection units (231). A laser sensor (36) is mounted on one side of the U-shaped assembly plate (31), and a reflector (361) that cooperates with the laser sensor (36) is mounted on the other side of the U-shaped assembly plate (31). Calibration holes (312) are provided on the surfaces of both U-shaped assembly plates (31). The two calibration holes (312) allow the light signal emitted from the output end of the laser sensor (36) to pass through. A calibration ring (24) is provided at each end of the inner side of the frame (22). The two calibration rings (24) are symmetrical at both ends of the frame (22). A small hole is provided in the middle of the calibration ring (24) for the light signal to pass through.

2. The arc edge defect detection device for mobile phone glass cover according to claim 1, characterized in that: The mold platform (21) has multiple suction holes (211) and a rubber membrane (212) on the lower surface of the mold platform (21). The rubber membrane (212) covers the lower side of the multiple suction holes (211). A magnetic block (213) is fixedly pasted on the surface of the rubber membrane (212). The magnetic blocks (213) assembled on the two mold platforms (21) are mutually attracted.

3. The arc edge defect detection device for mobile phone glass cover according to claim 2, characterized in that: It also includes a plate changing mechanism (40) for placing the cover plate on the mold table (21). The plate changing mechanism (40) includes an outer cover (41), the underside of which is equipped with a suction cup (43) for adsorbing the cover plate, and an electromagnet (42) for attracting the magnetic block (213) to approach.

4. The arc edge defect detection device for mobile phone glass cover according to claim 1, characterized in that: The drive assembly (35) includes a motor (354). The output end of the motor (354) is connected to a drive rod four (353) via a bevel gear. The two ends of the drive rod four (353) are connected to drive rod two (351) and drive rod three (352) respectively via corresponding bevel gears. The upper ends of drive rod two (351) and drive rod three (352) then drive drive rod one (321) on both sides of the measuring base mechanism (20) to rotate via bevel gears.

5. The device for detecting arc edge defects in mobile phone glass covers according to claim 1, characterized in that: The guide rail (23) and the frame (22) are made of titanium alloy, and the mold platform (21) is made of lightweight material.

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