An optical lens surface defect detection device

Abstract

The application relates to the technical field of optical lens production, and discloses an optical lens surface defect detection device, which comprises a workbench, a lens placing rack is arranged at the upper end of the workbench, a detection device is arranged in the lens placing rack, a clamping structure and a displacement component for controlling the movement of the clamping structure are further arranged on the workbench, the displacement component comprises a lifting plate located above the workbench and a driving piece for controlling the up-down sliding of the lifting plate, a U-shaped frame is fixed to one end of the lifting plate, a support is fixed to one side of the U-shaped frame, a driving motor is arranged on the other side of the U-shaped frame, a rack frame is slidably arranged on the inner side of the support, and an incomplete gear wheel matched with the rack frame is arranged on the output end of the driving motor. The application has the following advantages and effects: the lens can be clamped and detected by mechanical automation, and the clamping can be applied to lenses with different diameters.

Description

Technical Field

[0001] This invention relates to the field of optical lens manufacturing technology, and in particular to an optical lens surface defect detection device. Background Technology

[0002] After optical lenses are produced, workers need to inspect the products to prevent batches of defective products. During the inspection, the resin lens is placed on a table. Based on the principle that defects will cause diffuse reflection under the action of side light source, producing bright spots or bright bands, the edges and surfaces are carefully inspected for scratches and other surface defects.

[0003] Currently, in the process of optical lens inspection, lenses need to be handled manually, which easily leaves fingerprints and stains on the lens surface, affecting the inspection of scratches on the lens surface and increasing the inspection time per lens. Therefore, it is particularly important to set up an automatic handling device to improve inspection efficiency. After the implementation of such a device, the machine can be adjusted to handle lenses of different diameters, saving labor, improving efficiency, and expanding the applicability of the device. Therefore, it is necessary to propose an optical lens surface defect inspection device to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an optical lens surface defect detection device that can detect defects by automatically gripping lenses mechanically and is applicable to gripping lenses of different diameters.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an optical lens surface defect detection device, comprising a worktable, a lens placement rack installed at the upper end of the worktable, a detection device installed inside the lens placement rack, a clamping structure and a displacement component for controlling the movement of the clamping structure on the worktable, the displacement component including a lifting plate located above the worktable and a drive component for controlling the up and down sliding of the lifting plate, a U-shaped frame fixedly mounted at one end of the lifting plate, a bracket fixedly mounted on one side of the U-shaped frame, and a drive motor mounted on the other side, a rack frame slidably arranged on the inner side of the bracket, an incomplete gear adapted to the rack frame mounted on the output end of the drive motor, and L-shaped frames connecting the clamping structure fixedly mounted at both ends of the rack frame, and a feeding conveyor and a discharging conveyor respectively arranged on both sides of the clamping structure on the worktable.

[0006] By adopting the above technical solution, when performing defect detection on lenses, the incomplete gear is first rotated by the drive motor, causing the rack frame to slide back and forth intermittently on the support. When it slides to the front end, the clamping structure at the lower end corresponds to the feeding conveyor and the lens placement rack. Then, the clamping structure is lowered by the drive component, simultaneously clamping the untested lenses on the feeding conveyor and the tested lenses on the lens placement rack. After that, the rack frame is slid to the rear end, aligning with the lens placement rack and the discharge conveyor. Untested lenses can then be placed on the lens placement rack for testing by the detection device. Simultaneously, tested lenses are placed on the discharge conveyor for delivery. This cyclical testing greatly improves the testing efficiency and eliminates the need for manual intervention, reducing damage to the lenses.

[0007] A further feature of the present invention is that the end faces of both the feeding conveyor and the discharging conveyor are provided with arc-shaped blocks for positioning the lens.

[0008] By adopting the above technical solution, the curved block is used to limit the position of the lens, making its position more stable and easier to clamp when it is conveyed on the feeding conveyor and the discharging conveyor. When working with lenses of different sizes, the curved block can be removed from the surface of the conveyor and pasted in different positions for application.

[0009] A further embodiment of the present invention is that the driving component includes a fixed platform mounted on the top of the workbench, and a lifting cylinder connected to a lifting plate is mounted on the upper end of the fixed platform.

[0010] By adopting the above technical solution, the cylinder can push the lifting plate to move up and down, thereby controlling the lifting and lowering of the clamping structure and realizing the picking and placing of the lens.

[0011] A further feature of the present invention is that the upper end of the fixed platform is provided with a plurality of vertical rods that pass through the lifting plate and are slidably connected thereto, and the outside of the vertical rods is sleeved with springs.

[0012] By adopting the above technical solution, the guide of the vertical rod and the extension and rebound of the spring make the up-and-down sliding of the lifting plate more stable and reliable.

[0013] A further configuration of the present invention is as follows: the clamping structure includes a main tripod fixed to the bottom end of the L-shaped frame and a secondary tripod located directly below the main tripod. The bottom of the main tripod is fixedly equipped with an electric push rod connecting the secondary tripod. Three fixed plates are fixedly installed around the bottom circumference of the main tripod. A first movable frame and a second movable frame are rotatably arranged at the bottom of the fixed plates. Three pushers that are slidably connected to the end of the second movable frame are fixedly installed around the end of the secondary tripod. A connecting frame is installed at the bottom between the first movable frame and the second movable frame. A vertical plate is installed at the end of the connecting frame. A clamping device is fixedly installed at the lower end of the vertical plate.

[0014] By adopting the above technical solution, when clamping the lens, the electric push rod is controlled to move the bottom auxiliary tripod upward. The second movable frame and the first movable frame are controlled to rotate through the pusher. Under the drive of the connecting frame and the vertical plate, the three grippers below are moved towards the end face of the lens until the lens is clamped.

[0015] A further feature of the present invention is that the main tripod includes a fixed base fixed to the bottom of the L-shaped frame, and the fixed base is provided with three push plates and an adjustment device for synchronously adjusting the positions of the three push plates, and the vertical plate is fixed to the bottom of the push plates.

[0016] By adopting the above technical solution, the adjustment device can push the three push plates to move away from or towards the fixed base simultaneously, thereby adjusting the gripper below to grip lenses of different diameters and improving its applicability.

[0017] A further embodiment of the present invention is that the adjusting device includes three lead screws rotatably mounted on a fixed base and threadedly connected to a push plate. A main bevel gear is rotatably mounted inside the fixed base. A secondary bevel gear adapted to the main bevel gear is installed at one end of the lead screw extending into the fixed base. A linkage component for controlling the synchronous rotation of the two main bevel gears is also provided on the L-shaped frame. A first guide rod is also provided on the fixed base extending into the push plate and slidably connected thereto.

[0018] By adopting the above technical solution, the linkage controls the two main bevel teeth to rotate synchronously, causing the meshing slave bevel teeth to rotate, thereby driving the three external lead screws to rotate synchronously. Under the guidance of the first guide rod, the three push plates can be pushed away or closer to each other synchronously, and the positions of the three grippers below can be adjusted synchronously.

[0019] A further configuration of the present invention is as follows: the linkage includes a rotating rod rotatably mounted on an L-shaped frame and connected at its end to a main bevel gear; a synchronous belt mechanism is provided between the two rotating rods; and an adjustment motor for driving the rotating rod to rotate is mounted on one side of the L-shaped frame.

[0020] By adopting the above technical solution, the rotating rod is driven to rotate by the regulating motor, and the rotating rod on the other side is driven to rotate by the synchronous belt mechanism, thereby realizing the synchronous rotation of the main bevel teeth on both sides. The position of the grippers on the left and right sides can be adjusted at the same time, making the adjustment of the gripping size more convenient.

[0021] A further configuration of the present invention is as follows: the auxiliary tripod includes a movable base installed at the output end of the electric actuator, the outer circumference of the movable base is provided with three movable plates for connecting push members, two second guide rods are fixedly mounted on the movable plates and slide through the interior of the movable base, and a telescopic rod is installed between the movable plates and the push plates.

[0022] By adopting the above technical solution, during the process of controlling the synchronous movement of the three push plates, the three moving plates can also slide synchronously through the telescopic rod and the second guide rod, thereby achieving stable adjustment of the position of the gripper below and enabling it to achieve the gripping purpose.

[0023] A further configuration of the present invention is as follows: the telescopic rod includes two sleeves fixedly mounted on the push plate, the upper end of the movable plate is provided with a slide rod extending into the sleeve and slidably connected thereto, and the upper end of the slide rod is fixedly provided with a stop block.

[0024] By adopting the above technical solution, when the electric actuator drives the moving seat to rise and fall, the end of the slide rod slides inside the sleeve, and the moving plate will also move synchronously with the upper push plate, making the structural design more reasonable.

[0025] The beneficial effects of this invention are:

[0026] 1. This invention uses a drive motor to rotate an incomplete gear, causing a rack frame to slide intermittently back and forth on a support. When it slides to the frontmost position, the clamping structure at the lower end aligns with the feeding conveyor and the lens placement rack. The driving component then controls the clamping structure to descend, simultaneously clamping untested lenses from the feeding conveyor and tested lenses from the lens placement rack. Afterward, the rack frame slides to the rearmost position, aligning with the lens placement rack and the discharge conveyor. Untested lenses can then be placed on the lens placement rack for testing by a testing device, while tested lenses are placed on the discharge conveyor for delivery. This cyclical testing greatly improves testing efficiency and eliminates the need for manual intervention, reducing damage to the lenses.

[0027] 2. This invention controls the electric push rod to move the bottom auxiliary tripod upward, controls the rotation of the second movable frame and the first movable frame through the pusher, and causes the three grippers below to move towards the end face of the lens under the drive of the connecting frame and the vertical plate, so as to achieve stable gripping of the lens and replace manual operation.

[0028] 3. In this invention, the rotating rod is driven by adjusting the motor control, and the rotating rod on the other side is driven to rotate by the synchronous belt mechanism, thereby achieving synchronous rotation of the main bevel teeth on both sides. This causes the meshing bevel teeth to rotate, thereby driving the three external lead screws to rotate synchronously. Under the guidance of the first guide rod, the three push plates can be pushed away or closer at the same time, and the positions of the three grippers below can be adjusted synchronously. This makes the gripping structure applicable to gripping lenses of different diameters, improving its applicability. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is an overall structural diagram of an optical lens surface defect detection device according to the present invention.

[0031] Figure 2 This is the present invention. Figure 1 Connection diagram of the clamping structure and displacement component.

[0032] Figure 3 This is the present invention. Figure 2 Structural diagram of the drive component.

[0033] Figure 4 This is the present invention. Figure 1 Structural diagram of the mid-displacement component.

[0034] Figure 5 This is the present invention. Figure 1 Overall diagram of the clamping structure.

[0035] Figure 6 This is the present invention. Figure 5 Internal structure diagram of the central fixed seat.

[0036] Figure 7 This is the present invention. Figure 6 Structural diagram of the telescopic rod.

[0037] In the diagram: 1. Workbench; 2. Lens holder; 3. Testing device; 4. Clamping structure; 41. Electric actuator; 42. Fixing plate; 43. First movable frame; 44. Second movable frame; 45. Pushing component; 46. Connecting frame; 47. Vertical plate; 48. Clamping device; 49. Fixing base; 410. Push plate; 411. Lead screw; 412. Main bevel gear; 413. Driven bevel gear; 414. First guide rod; 415. Rotating rod; 416. Synchronous belt mechanism; 417. Adjustment... 418. Motor; 419. Moving seat; 420. Moving plate; 421. Second guide rod; 422. Sleeve; 423. Slide rod; 424. Stop block; 5. Displacement component; 51. Lifting plate; 52. U-shaped frame; 53. Support; 54. Drive motor; 55. Rack frame; 56. Incomplete gear; 57. L-shaped frame; 58. Fixed platform; 59. Lifting cylinder; 510. Vertical rod; 511. Spring; 6. Feed conveyor; 7. Discharge conveyor; 8. Arc block. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, an optical lens surface defect detection device includes a worktable 1, a lens placement rack 2 installed on the upper end of the worktable 1, a detection device 3 installed inside the lens placement rack 2, a clamping structure 4 and a displacement component 5 for controlling the movement of the clamping structure 4 on the worktable 1, the displacement component 5 including a lifting plate 51 located above the worktable 1 and a driving component for controlling the up and down sliding of the lifting plate 51, a U-shaped frame 52 fixedly installed at one end of the lifting plate 51, a bracket 53 fixedly installed on one side of the U-shaped frame 52, and a drive motor 54 installed on the other side, a rack frame 55 slidably arranged on the inner side of the bracket 53, an incomplete gear 56 adapted to the rack frame 55 installed on the output end of the drive motor 54, and L-shaped frames 57 connecting the clamping structure 4 fixedly installed at both ends of the rack frame 55, and a feeding conveyor 6 and a discharging conveyor 7 respectively arranged on both sides of the clamping structure 4 on the worktable 1.

[0040] When inspecting lenses for defects, the incomplete gear 56 is first rotated by the drive motor 54, causing the rack frame 55 to slide back and forth intermittently on the support 53. When it slides to the front end, the clamping structure 4 at the lower end corresponds to the feeding conveyor 6 and the lens placement rack 2. Then, the clamping structure 4 is lowered by the drive component, and the uninspected lenses on the feeding conveyor 6 and the inspected lenses on the lens placement rack 2 are clamped at the same time. Then, the rack frame 55 is slid to the rear end, so that it corresponds to the lens placement rack 2 and the discharge conveyor 7. The uninspected lenses can be placed on the lens placement rack 2 and inspected by the inspection device 3. At the same time, the inspected lenses are placed on the discharge conveyor 7 and sent out. This cyclic inspection can greatly improve the inspection efficiency and does not require manual intervention, thus reducing damage to the lenses.

[0041] like Figure 1 As shown, both the feed conveyor 6 and the discharge conveyor 7 are provided with arc-shaped blocks 8 for positioning the lenses. The arc-shaped blocks 8 are used to limit the position of the lenses, making their position more stable and easier to grip when they are conveyed on the feed conveyor 6 and the discharge conveyor 7. When working with lenses of different sizes, the arc-shaped blocks 8 can be removed from the surface of the conveyor and pasted in different positions for different applications.

[0042] like Figure 3 As shown, the driving component includes a fixed platform 58 installed on the top of the workbench 1. A lifting cylinder 59 connected to the lifting plate 51 is installed on the upper end of the fixed platform 58. A plurality of vertical rods 510 are also provided on the upper end of the fixed platform 58, which pass through the lifting plate 51 and are slidably connected to it. A spring 511 is sleeved on the outside of the vertical rods 510.

[0043] The cylinder 59 can push the lifting plate 51 to move up and down, thereby controlling the lifting and lowering of the clamping structure 4 to realize the picking and placing of the lens. The guide of the vertical rod 510 and the extension and rebound of the spring 511 make the up and down sliding of the lifting plate 51 more stable and reliable.

[0044] like Figure 4 , Figure 5 As shown in Figure 6, the clamping structure 4 includes a main tripod fixed to the bottom of the L-shaped frame 57 and a secondary tripod located directly below the main tripod. The bottom of the main tripod is fixed with an electric push rod 41 connecting the secondary tripod. The bottom circumference of the main tripod is fixed with three fixing plates 42. The bottom of the fixing plates 42 is rotatably provided with a first movable frame 43 and a second movable frame 44. The end circumference of the secondary tripod is fixed with three pushers 45 that are slidably connected to the end of the second movable frame 44. The bottom between the first movable frame 43 and the second movable frame 44 is installed with a connecting frame 46. The end of the connecting frame 46 is installed with a vertical plate 47. The lower end of the vertical plate 47 is fixed with a clamping device 48.

[0045] When gripping the lens, the electric push rod 41 is controlled to move the bottom auxiliary tripod upward. The pusher 45 controls the rotation of the second movable frame 44 and the first movable frame 43. Driven by the connecting frame 46 and the vertical plate 47, the three grippers 48 below move towards the end face of the lens until the lens is gripped.

[0046] like Figure 6As shown, the main tripod includes a fixed base 49 fixed to the bottom of the L-shaped frame 57. Three push plates 410 are circumferentially arranged on the fixed base 49, along with an adjustment device for synchronously adjusting the positions of the three push plates 410. A vertical plate 47 is fixed to the bottom of the push plates 410. The adjustment device includes three lead screws 411 rotatably mounted on the fixed base 49 and threadedly connected to the push plates 410. A main bevel gear 412 is rotatably arranged inside the fixed base 49. At one end of each lead screw 411 extending into the fixed base 49, a part is installed that connects with the main bevel gear 412. The L-shaped frame 57 is also provided with a linkage component that controls the synchronous rotation of the two main bevel teeth 412, and the fixed base 49 is also provided with a first guide rod 414 that extends into the push plate 410 and is slidably connected thereto. The linkage component includes a rotating rod 415 that is rotatably mounted on the L-shaped frame 57 and whose end is connected to the main bevel teeth 412. A synchronous belt mechanism 416 is provided between the two rotating rods 415. An adjusting motor 417 that drives the rotating rod 415 to rotate is installed on one side of the L-shaped frame 57.

[0047] The adjustment device can push the three push plates 410 to move away from or towards the fixed base 49 simultaneously, thereby adjusting the gripper 48 below to grip lenses of different diameters and improving its applicability. Specifically, the adjustment motor 417 controls the rotation of the drive rod 415, and through the synchronous belt mechanism 416 drives the drive rod 415 on the other side to rotate, thereby achieving synchronous rotation of the main bevel teeth 412 on both sides, causing the meshing bevel teeth 413 to rotate, thereby driving the three lead screws 411 outside to rotate synchronously. Under the guidance of the first guide rod 414, the three push plates 410 can be pushed away from or towards the fixed base 49 simultaneously, and the positions of the three grippers 48 below can be adjusted synchronously.

[0048] like Figure 6 , Figure 7 As shown, the auxiliary tripod includes a movable base 418 mounted on the output end of the electric actuator 41. The outer circumference of the movable base 418 is provided with three movable plates 419 that connect to the pushers 45. Two second guide rods 420 are fixedly mounted on the movable plates 419, penetrating into the interior of the movable base 418 and slidably connected thereto. A telescopic rod is installed between the movable plate 419 and the pusher plate 410. The telescopic rod includes two sleeves 421 fixedly mounted on the pusher plate 410. A slide rod 422 is mounted on the upper end of the movable plate 419, extending into the sleeves 421 and slidably connected thereto. A stop block 423 is fixedly mounted on the upper end of the slide rod 422.

[0049] During the synchronous movement of the three push plates 410, the three moving plates 419 can also slide synchronously through the telescopic rod and the second guide rod 420, thereby achieving stable adjustment of the position of the lower gripper 48 and enabling it to achieve the gripping purpose. When the electric push rod 41 drives the moving seat 418 to rise and fall, the end of the slide rod 422 slides inside the sleeve 421, and the moving plate 419 will also move synchronously with the upper push plate 410, making the structural design more reasonable.

Claims

1. An optical lens surface defect detection device, comprising a worktable (1), characterized in that: A lens holder (2) is installed on the upper end of the workbench (1). A detection device (3) is installed inside the lens holder (2). A clamping structure (4) and a displacement component (5) for controlling the movement of the clamping structure (4) are also provided on the workbench (1). The displacement component (5) includes a lifting plate (51) located above the workbench (1) and a drive component for controlling the up and down sliding of the lifting plate (51). A U-shaped frame (52) is fixedly installed at one end of the lifting plate (51). A bracket (53) is fixed on one side and a drive motor (54) is installed on the other side. A rack frame (55) is slidably arranged on the inner side of the bracket (53). An incomplete gear (56) adapted to the rack frame (55) is installed on the output end of the drive motor (54). An L-shaped frame (57) connecting the clamping structure (4) is fixedly installed at both ends of the rack frame (55). A feeding conveyor (6) and a discharging conveyor (7) are respectively arranged on both sides of the clamping structure (4) of the worktable (1).

2. The optical lens surface defect detection device according to claim 1, characterized in that: Both the feed conveyor (6) and the discharge conveyor (7) are provided with arc-shaped blocks (8) for positioning the lens.

3. The optical lens surface defect detection device according to claim 1, characterized in that: The driving component includes a fixed platform (58) mounted on the top of the workbench (1), and a lifting cylinder (59) connected to the lifting plate (51) is mounted on the upper end of the fixed platform (58).

4. The optical lens surface defect detection device according to claim 3, characterized in that: The upper end of the fixed platform (58) is also provided with a plurality of vertical rods (510) that pass through the lifting plate (51) and are slidably connected thereto. The outside of the vertical rods (510) is fitted with springs (511).

5. The optical lens surface defect detection device according to claim 1, characterized in that: The clamping structure (4) includes a main tripod fixed to the bottom of the L-shaped frame (57) and a secondary tripod located directly below the main tripod. The bottom of the main tripod is fixed with an electric push rod (41) connecting the secondary tripod. The bottom circumference of the main tripod is fixed with three fixed plates (42). The bottom of the fixed plates (42) is rotatably provided with a first movable frame (43) and a second movable frame (44). The end circumference of the secondary tripod is fixed with three pushers (45) that are slidably connected to the end of the second movable frame (44). The bottom between the first movable frame (43) and the second movable frame (44) is installed with a connecting frame (46). The end of the connecting frame (46) is installed with a vertical plate (47). The lower end of the vertical plate (47) is fixed with a clamp (48).

6. The optical lens surface defect detection device according to claim 5, characterized in that: The main tripod includes a fixed base (49) fixed to the bottom of the L-shaped frame (57). The fixed base (49) is provided with three push plates (410) around its circumference and an adjustment device for synchronously adjusting the position of the three push plates (410). The vertical plate (47) is fixed to the bottom of the push plate (410).

7. The optical lens surface defect detection device according to claim 6, characterized in that: The adjusting device includes three lead screws (411) rotatably mounted on a fixed base (49) and threadedly connected to a push plate (410). A main bevel gear (412) is rotatably mounted inside the fixed base (49). A secondary bevel gear (413) adapted to the main bevel gear (412) is installed at one end of the lead screw (411) extending into the fixed base (49). A linkage component for controlling the synchronous rotation of the two main bevel gears (412) is also provided on the L-shaped frame (57). A first guide rod (414) is also provided on the fixed base (49) extending into the push plate (410) and slidably connected thereto.

8. The optical lens surface defect detection device according to claim 7, characterized in that: The linkage includes a rotating rod (415) rotatably mounted on an L-shaped frame (57) and connected at its end to a main bevel gear (412). A synchronous belt mechanism (416) is provided between the two rotating rods (415). An adjustment motor (417) for driving the rotating rod (415) to rotate is installed on one side of the L-shaped frame (57).

9. The optical lens surface defect detection device according to claim 8, characterized in that: The auxiliary tripod includes a movable base (418) installed at the output end of the electric push rod (41). The outer circumference of the movable base (418) is provided with three movable plates (419) that connect to the pusher (45). Two second guide rods (420) are fixedly mounted on the movable plate (419) and slide through the interior of the movable base (418). A telescopic rod is installed between the movable plate (419) and the push plate (410).

10. The optical lens surface defect detection device according to claim 9, characterized in that: The telescopic rod includes two sleeves (421) fixed on the push plate (410), and a slide rod (422) extending into and slidably connected to the upper end of the moving plate (419) is installed. A stop block (423) is fixedly installed at the upper end of the slide rod (422).

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