Optical lens detection device

By designing an optical lens detection device, the automatic cleaning, detection and labeling of lenses is realized, the problem of low manual detection efficiency is solved, and the detection efficiency and quality are improved.

CN223229481UActive Publication Date: 2025-08-15HUBEI XINGYAO OPTICAL CO LTD
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Patent Information

Application Number
CN202422196513.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-09
Publication Date
2025-08-15
Estimated Expiration
2034-09-09

AI Technical Summary

Technical Problem

During the inspection process of existing optical lenses, manual operation is time-consuming and labor-intensive, and the detection efficiency is low, making it difficult to achieve efficient automation.

Method used

An optical lens detection device is designed, including a double-segment conveyor table, transplanting assembly, loading assembly, correction assembly, detection assembly and discharge assembly. The lens cleaning, detection and marking are realized through automated assembly lines, and the unqualified lenses are marked by light-transmitting detection device and the cutting head.

Benefits of technology

The automatic loading and unloading of lenses is realized, the detection efficiency is improved, inferior products are avoided, and the detection quality is ensured.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of optical lenses, in particular to an optical lens detection device which comprises an operation table, double-section type conveying tables installed on the table top of the operation table and a detection assembly located between the double-section type conveying tables. The transplanting assembly is installed at the head end of the double-section type conveying table, and the discharging assembly is installed at the tail end of the double-section type conveying table. According to the optical lens detection device, the tray bearing the lens is moved to a proper position through the feeding assembly, the lens needing to be detected can be conveniently moved to the correction assembly through the transplanting assembly and conveniently moved to the double-section type conveying table again to complete feeding operation, then the double-section type conveying table sequentially passes through the cleaning roller and the detection assembly, and the detection efficiency is improved. And meanwhile, when the lens is detected to be unqualified, the pushing part of the detection assembly can drive the tool bit to mark scratches of the lens, then discharging is completed through the discharging assembly, and therefore the production efficiency can be improved through automatic detection.
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Description

Technical Field

[0001] The utility model relates to the technical field of optical lenses, in particular to an optical lens detection device. Background Art

[0002] Optical glass is a mixture of high-purity oxides of silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, and barium, mixed according to a specific formula. It is melted in a platinum crucible at high temperature and stirred using ultrasound to remove air bubbles. The glass is then slowly cooled over a long period of time to prevent internal stress. After cooling, the glass is tested with optical instruments to verify its purity, transparency, uniformity, refractive index, and dispersion. Qualified glass blocks are then heated and forged to form optical lens blanks.

[0003] At present, in the process of producing optical lenses, the transmittance of optical lenses is usually tested. However, most of the existing optical lens testing is completed one-to-one manually. The measurement process requires manual operation, which is time-consuming and labor-intensive, and has low detection efficiency, making it inconvenient to use for optical lens testing. Utility Model Content

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: an optical lens inspection device, comprising an operating table, a double-stage conveyor table mounted on the operating table top, a detection assembly mounted between the double-stage conveyor tables, a transplanting assembly mounted at the front end of the double-stage conveyor tables, and a blanking assembly mounted at the rear end of the double-stage conveyor tables, the operating table being equipped with two sets of cleaning rollers mounted at the front end of the double-stage conveyor tables;

[0005] The detection assembly includes a detection frame fixed on the operating table, a waist hole plate fixed on the inner side of the detection frame that is connected to the segmented part of the double-stage conveyor platform, a knife groove is opened on the waist hole plate, a pushing part is installed on the side of the detection frame, and a vertical cylinder is installed on the inner top wall, a light transmission detection device is installed at the ejection end of the vertical cylinder, a pressure edge is formed on the side of the light transmission detection device, and a knife head that moves in the knife groove is fixed on the top of the pushing part.

[0006] Furthermore, the pushing portion includes a bottom plate fixed to the inner side of the detection frame, and a propulsion cylinder installed on the side, the top block of the propulsion cylinder is slidably connected to the bottom plate, and the cutter head is installed on the top block.

[0007] Furthermore, the operating table is also equipped with a loading assembly docking with the transplanting assembly, and a correction assembly between the transplanting assembly and the loading assembly.

[0008] Furthermore, the transplanting assembly includes a long linear module fixed on the operating table, and a short linear module distributed opposite to the long linear module. The moving ends of the long linear module and the short linear module are fixed with a frame plate, the bottom of the frame plate is fixed with a vertical plate, two push-down cylinders are installed on one side of the vertical plate, and the ejection end of the push-down cylinder is fixed with a suction cup 2.

[0009] Furthermore, the loading assembly includes a material moving part fixed on the operating table, and two groups of vertical U-shaped frames, the vertical U-shaped frames are equipped with a lifting device, the lifting end of the lifting device is fixed with a lifting plate that slides with the vertical U-shaped frame, one group of vertical U-shaped frames is fixed with side panels on both sides of the top, the bottom of the side panel is equipped with a push cylinder, and the ejection end of the push cylinder is fixed with a push plate.

[0010] Furthermore, the material moving part includes a moving device fixed on the operating table, a downward pressure cylinder is installed on the moving end of the moving device, a downward pressure plate sliding with the moving end is fixed to the ejection end of the downward pressure cylinder, a long plate is fixed on the top of the lower pressure plate, two back-to-back clamping cylinders are installed on the long plate, and relatively distributed clamping plates are fixed to the ejection end of the clamping cylinder.

[0011] Furthermore, the correction component includes a support platform fixed on the operating table, a support plate is fixed on the top of the support platform, two slots are opened on the front and left and right sides of the support plate, two side push cylinders are installed on the support platform, the ejection ends of the side push cylinders are fixed with side push plates sliding in the left and right slots, two bottom push cylinders are fixed on the bottom of the support plate, the ejection ends of the bottom push cylinders are fixed with bottom push plates sliding in the front slots, and multiple limit blocks are fixed on the top of the support plate, the side push plates and the bottom push plates.

[0012] Furthermore, the blanking assembly includes a vertical frame fixed on the operating table, a screw device is installed on the top of the vertical frame, a movable plate sliding with the vertical frame is fixed on the movable end of the screw device, a lifting cylinder is installed on the bottom of the movable plate, a lifting plate is fixed on the ejection end of the lifting cylinder, and a plurality of suction cups are installed on the bottom of the lifting plate.

[0013] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0014] The optical lens inspection device moves the tray carrying the lenses to a suitable position through the loading component, so that the transfer component can first move the lens to be inspected to the correction component, and then move it to the double-stage conveyor table to complete the loading operation. Then the double-stage conveyor table will pass through the cleaning roller and the inspection component in sequence, so that the lenses can be cleaned before inspection. At the same time, when the inspection fails, the pushing part of the inspection component will drive the knife head to mark the scratches on the lens, and then the unloading will be completed through the unloading component. Therefore, the production efficiency can be improved through automated inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a three-dimensional diagram of the blanking component in the utility model;

[0017] Figure 3 A three-dimensional diagram of the detection component in the present utility model;

[0018] Figure 4 A three-dimensional diagram of the transplanting assembly in the present invention;

[0019] Figure 5 A three-dimensional diagram of the correction component in the present invention;

[0020] Figure 6 A three-dimensional diagram of the loading assembly in the present invention;

[0021] Figure 7 For this utility model Figure 6 3D diagram of the center-side panel connection structure.

[0022] In the figure: 1. Operating table; 2. Double-stage conveyor table; 3. Unloading assembly; 301. Vertical frame; 302. Screw device; 303. Moving plate; 304. Lifting cylinder; 305. Lifting plate; 306. Suction cup 1; 4. Detection assembly; 401. Detection frame; 402. Waist hole plate; 403. Vertical cylinder; 404. Transmittance detection device; 405. Bottom plate; 406. Propelling cylinder; 407. Cutter head; 408. Edge pressing; 409. Cutter groove; 5. Cleaning roller; 6. Transplanting assembly; 601. Long linear module; 602. Short linear module; 603. Frame Plate; 604, vertical plate; 605, push-down cylinder; 606, suction cup two; 7, correction component; 701, support platform; 702, support plate; 703, limit block; 704, side push cylinder; 705, side push plate; 706, bottom push cylinder; 707, bottom push plate; 8, loading component; 801, moving device; 802, downward pressure cylinder; 803, lower pressure plate; 804, long plate; 805, clamping cylinder; 806, clamping plate; 807, vertical U-shaped frame; 808, lifting device; 809, lifting plate; 810, side plate; 811, push cylinder; 812, push plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1 In this embodiment, an optical lens inspection device includes an operating table 1, on the surface of which a double-section conveyor platform 2 is installed, and a detection component 4 is installed and docked between the two sections of the double-section conveyor platform 2, as well as a transplanting component 6 distributed at the head end of the double-section conveyor platform 2 and a unloading component 3 at the tail end. The operating table 1 is equipped with two groups of cleaning rollers 5 located above the first section belt of the double-section conveyor platform 2.

[0025] In the above structure, the lens can be placed on the head end of the double-stage conveyor table for transportation through the transfer component. However, during the transportation process, the lens will pass through two cleaning rollers in turn. The cleaning rollers can clean the dust on the surface of the lens before detection to avoid the adhesion of dust affecting the detection effect. The lens is then transported to the detection component to complete the transmittance detection of the lens. At the same time, when the test fails, the lens will also be marked and then transported to the tail end of the double-stage conveyor table. The lens will be unloaded by the unloading component. In summary, automatic loading and unloading and marking are realized, which can improve the efficiency of detection.

[0026] like Figure 3 In the direction shown, the detection component 4 includes a detection frame 401 fixed on the operating table 1 and located between the two sections of the double-section conveyor platform 2, and a waist hole plate 402 is fixed on the inner side of the detection frame 401, which is on the same horizontal plane as the belt of the double-section conveyor platform 2, and a knife groove 409 is provided on the waist hole plate 402. A pushing part is installed on the right side of the detection frame 401, and a vertical cylinder 403 is installed on the inner top wall. The ejection end of the vertical cylinder 403 is installed with a light transmission detection device 404 which is vertically symmetrical with the waist hole on the waist hole plate 402. A pressing edge 408 is formed on the side of the light transmission detection device 404, and a knife head 407 that moves in the knife groove 409 is fixed to the top of the pushing part. The pushing part includes a bottom plate 405 fixed on the inner side of the detection frame 401, and a propulsion cylinder 406 installed on the side. The top block of the propulsion cylinder 406 is slidably connected to the bottom plate 405, and the knife head 407 is installed on the top block. The lens is transported by a double-stage conveyor table until it is on the waist hole plate. The vertical cylinder drives the light transmission detection device to move downward until the pressure edge presses the lens down and into position. At the same time, there is a certain distance between the light transmission detection device and the lens. The light transmission detection is completed through the cooperation of the light transmission detection device and the waist hole plate. When the product is unqualified, the propulsion cylinder drives the cutter head to move in the cutter groove, thereby marking the lens by the cutter head. This can avoid inferior products being passed off as good ones and is also convenient for later identification.

[0027] like Figure 2In the direction shown, the unloading assembly 3 includes a stand 301 fixed to the operating table 1 and near the side of the tail section of the two-stage conveyor 2. A screw device 302 is installed on the top of the stand 301. A movable plate 303 is fixed to the movable end of the screw device 302 and is slidably connected to the top of the stand 301. A lifting cylinder 304 is fixed to the bottom of the movable plate 303. A lifting plate 305 is fixed to the ejection end of the lifting cylinder 304. The bottom of the lifting plate 305 is installed with a plurality of suction cups 1 306 arranged at equal distances above the belt of the tail section of the two-stage conveyor 2. After the lens inspection is completed, it is transported to the tail section of the two-stage conveyor again by the two-stage conveyor for neat arrangement. When the number of lenses reaches the number that matches the number of suction cups 1, the lifting cylinder drives the suction cups 1 to contact and adsorb the lenses through the lifting plate. The lenses are then separated from the two-stage conveyor by the lifting cylinder and the screw device to complete the unloading.

[0028] like Figure 4-7 The operating table 1 is also equipped with a loading assembly 8 and a correction assembly 7. The transfer assembly 6 is docked with the loading assembly 8, the correction assembly 7, and the two-stage conveyor 2, respectively. The loading assembly can move the tray carrying the lenses so that the tray docks with the transfer assembly. The transfer assembly then transfers the lenses in the tray to the correction assembly for correction. This facilitates the transfer assembly to neatly place the lenses on the two-stage conveyor and move them, thus achieving automatic loading.

[0029] Among them, such as Figure 6In the direction shown, the loading assembly 8 includes a material moving part fixed on the operating table 1, and two sets of vertical U-shaped frames 807. A lifting device 808 is installed on the vertical U-shaped frame 807. The lifting end of the lifting device 808 is fixed with a lifting plate 809 that slides with the vertical U-shaped frame 807. The tops of the left and right sides of the vertical U-shaped frame 807 are fixed with side plates 810. A movable groove is opened on the side plate 810. A push cylinder 811 is installed at the bottom of the side plate 810. The ejection end of the push cylinder 811 is fixed to a push plate 812 that moves in the movable groove. The push plate 812 is relatively Four convex plates are formed on one side, and the material moving part includes a moving device 801 fixed on the operating table 1, and a downward pressure cylinder 802 is installed on the moving end of the moving device 801, and a lower pressure plate 803 is fixed on the ejection end of the downward pressure cylinder 802, which is slidably connected to the moving end of the moving device 801, and a long plate 804 is fixed on the top of the lower pressure plate 803. The front and rear sides of the top of the long plate 804 are both equipped with clamping cylinders 805 with ejection ends facing each other, and the ejection ends of the clamping cylinders 805 are fixed with relatively distributed clamping plates 806, and two convex plates are formed on the opposite sides of the two clamping plates 806. The lifting plate is driven up by the screw rod device on the right side, and the tray carrying the lenses can be lifted by the right lifting plate, and then the lower pressure plate is driven down by the downward pressure cylinder until the tray is between the two clamping plates, and the clamping plate is driven to clamp the tray by the clamping cylinder, and the tray is moved to the pushing plate by the moving device. The bottom of the tray is provided with a support groove that is adapted to the convex plate of the pushing plate, and the pushing plate can extend into the support groove to support and lift the tray. At the same time, the side plate is driven to move by the pushing cylinder, and the push plate can be clamped and fixed by the pushing plate. When the products on the tray are moved, the left wire lifting device drives the stacked trays and the tray supports on the pushing plate to stack through the lifting plate, and then the pushing cylinder drives the pushing plate to separate from the tray, and then the left lifting plate drives the tray to move down, so that the pushing plate can support the next group of trays, thereby realizing automatic transportation of trays carrying lenses.

[0030] like Figure 4In the direction shown, the transplanting assembly 6 includes a long linear module 601 fixed on the operating table 1, and a short linear module 602 distributed opposite to the long linear module 601. The movable end of the long linear module 601 is fixed with a frame plate 603 that can be above the left lifting plate 809 and the correction assembly 7, and the movable end of the short linear module 602 is also fixed with a frame plate 603 that can be above the correction assembly 7 and the head end of the two-stage conveying platform 2. A vertical plate 604 is fixed to the bottom of the frame plate 603, and two downward push cylinders 605 are installed on the opposite sides of the two vertical plates 604, and a suction cup 2 606 is fixed to the ejection end of the downward push cylinder 605. The long linear module drives the suction cup 2 to move through the frame, and at the same time cooperates with the push-down cylinder to transfer the lens on the tray on the lifting plate to the correction component for correction processing. Then, the short linear module drives the suction cup 2 to move through the frame, and also cooperates with the push-down cylinder to transfer the corrected lens to the head end of the double-stage conveyor table to complete the loading operation.

[0031] like Figure 5 In the direction shown, the correction component 7 includes a support platform 701 fixed on the operating table 1, and a support plate 702 is fixed on the top of the support platform 701, and a partition is fixed at the top center of the support plate 702. Two notches are provided on the front of the support plate 702, and notches are also provided on the left and right sides. Two side push cylinders 704 with their ejection ends facing each other are installed on the left and right sides of the top of the support platform 701. The ejection ends of the side push cylinders 704 are fixed with side push plates 705 that slide in the left and right notches. Two bottom push cylinders 706 are fixed to the bottom of the support plate 702, and the ejection ends of the bottom push cylinders 706 are fixed with bottom push plates 707 that slide in the front notches. The top of the support plate 702 and the top of the bottom push plate 707 are both fixed on two limit blocks 703, and the tops of the two side push plates 705 are also fixed with limit blocks 703. When the lens is moved to the support plate through the transfer assembly, the support plate can be divided into two correction areas through the partition, so that two lenses can be corrected at the same time. When the side push cylinder and the bottom push cylinder are operated at the same time, the side push plate and the bottom push plate drive the corresponding limit blocks to squeeze the lenses, and with the assistance of the limit blocks on the support plate, the correction of the lenses is completed, so that the lenses are placed on the double-stage conveyor table for overall conveyance, avoiding skew delivery to the detection assembly to affect the detection.

[0032] The working principle of the above embodiment is:

[0033] The lifting plate is driven up by the right lifting device to push up, so that the top tray carrying the lens is ejected, and the lower pressure plate is driven down by the downward pressure cylinder until the tray is between the two clamping plates, and the convex plate is extended into the support groove and the tray is clamped by the clamping cylinder. Then the moving device drives the lower pressure plate to move above the left tray, and then the tray is placed on the two pushing plates for support, and the pushing cylinder drives the pushing plates to clamp the tray. Then the long linear module moves through the frame plate and the vertical plate, and at the same time, the downward push cylinder drives the suction cup to move down to adsorb the lens, so that the lens can be moved to the support plate. When the tray product is moved, the left lifting device supports the tray through the lifting plate, and then the pushing cylinder retreats. The left lifting device retreats, and the pushing cylinder resets so that the pushing plate supports the next group. At this time, the side push cylinder and the bottom push cylinder are running, and the bottom push plate and the side push plate are used. Drive the limit block to clamp the lens, cooperate with the limit block on the support plate to complete the correction of the lens, and then drive the suction cup 2 to adsorb the lens through the push-down cylinder, and then transfer the lens to the double-stage conveyor through the short linear module. During the conveying process, the surface of the lens will be cleaned by two sets of cleaning rollers until it is located on the waist hole plate. The vertical cylinder drives the light transmission detection device to move down until the pressure edge contacts and presses the lens tightly, and the light transmission detection device is used to detect the transmittance. When the test fails, the propulsion cylinder drives the knife head to scratch the bottom of the lens. After the test is completed, the next lens is used to push the tested lens to the tail section of the double-stage conveyor. When it moves to a certain number, the lifting cylinder drives the suction cup 1 to adsorb the lens through the lifting plate, and then drives the moving plate to move through the screw device, so that the lens can be separated from the double-stage conveyor.

[0034] In summary, it is possible to realize automatic replenishment of lenses and automatic loading and unloading. At the same time, during the inspection process, lenses that fail the inspection can be marked, thereby preventing inferior products from being passed off as good ones and improving the quality of inspection. Moreover, through automation, it can also be suitable for large-scale inspection and effectively improve the efficiency of inspection.

[0035] The entire workflow is complete, and all contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0036] It should be noted that in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical lens inspection device, comprising an operating table (1), characterized in that: The operating table (1) is provided with a double-stage conveying table (2) and a detection assembly (4) located between the double-stage conveying tables (2), as well as a transplanting assembly (6) at the head end of the double-stage conveying table (2) and a blanking assembly (3) at the tail end. The operating table (1) is provided with two sets of cleaning rollers (5) located at the head end of the double-stage conveying table (2). The detection assembly (4) comprises a detection frame (401) fixed on the operating table (1); a waist hole plate (402) connected to the segment of the double-stage conveying platform (2) is fixed on the inner side of the detection frame (401); a knife groove (409) is provided on the waist hole plate (402); a pushing portion is installed on the side of the detection frame (401); and a vertical cylinder (403) is installed on the inner top wall; a light transmission detection device (404) is installed at the ejection end of the vertical cylinder (403); a pressing edge (408) is formed on the side of the light transmission detection device (404); and a knife head (407) located in the knife groove (409) is fixed on the top of the pushing portion.

2. The optical lens detection device according to claim 1, characterized in that: The pushing portion comprises a bottom plate (405) fixed on the inner side of the detection frame (401) and a propulsion cylinder (406) installed on the side. The top block of the propulsion cylinder (406) is slidably connected to the bottom plate (405), and the cutter head (407) is installed on the top block.

3. The optical lens detection device according to claim 1, characterized in that: The operating platform (1) is also provided with a loading assembly (8) docked with the transplanting assembly (6), and a correction assembly (7) between the transplanting assembly (6) and the loading assembly (8).

4. The optical lens detection device according to claim 3, characterized in that: The transplanting assembly (6) comprises a long linear module (601) fixed on the operating table (1), and a short linear module (602) distributed relative to the long linear module (601), wherein the movable ends of the long linear module (601) and the short linear module (602) are both fixed with a frame plate (603), the bottom of the frame plate (603) is fixed with a vertical plate (604), one side of the vertical plate (604) is installed with two downward push cylinders (605), and the ejection end of the downward push cylinder (605) is fixed with a second suction cup (606).

5. The optical lens detection device according to claim 4, characterized in that: The loading assembly (8) comprises a material moving portion fixed on the operating table (1), and two groups of vertical U-shaped frames (807), wherein a lifting device (808) is installed on the vertical U-shaped frame (807), and a lifting plate (809) that slides with the vertical U-shaped frame (807) is fixed to the lifting end of the lifting device (808), and side plates (810) are fixed to both sides of the top of one group of vertical U-shaped frames (807), and a push cylinder (811) is installed at the bottom of the side plate (810), and a push plate (812) is fixed to the ejection end of the push cylinder (811).

6. The optical lens detection device according to claim 5, characterized in that: The material transfer section comprises a moving device (801) fixed on an operating table (1), a downward pressure cylinder (802) is installed on the moving end of the moving device (801), a downward pressure plate (803) sliding with the moving end is fixed on the ejection end of the downward pressure cylinder (802), a long plate (804) is fixed on the top of the downward pressure plate (803), two back-to-back clamping cylinders (805) are installed on the long plate (804), and relatively distributed clamping plates (806) are fixed on the ejection end of the clamping cylinder (805).

7. The optical lens detection device according to claim 6, characterized in that: The correction assembly (7) comprises a support platform (701) fixed on the operating table (1), a support plate (702) fixed on the top of the support platform (701), two slots are opened on the front and left and right sides of the support plate (702), two side push cylinders (704) are installed on the support platform (701), the ejection ends of the side push cylinders (704) are fixed with side push plates (705) sliding in the left and right slots, two bottom push cylinders (706) are fixed on the bottom of the support plate (702), the ejection ends of the bottom push cylinders (706) are fixed with bottom push plates (707) sliding in the front slots, and a plurality of limit blocks (703) are fixed on the top of the support plate (702) and the side push plates (705) and the bottom push plate (707).

8. The optical lens detection device according to claim 1, characterized in that: The blanking assembly (3) comprises a stand (301) fixed on the operating table (1), a screw device (302) is installed on the top of the stand (301), a movable plate (303) sliding with the stand (301) is fixed on the movable end of the screw device (302), a lifting cylinder (304) is installed on the bottom of the movable plate (303), a lifting plate (305) is fixed on the ejection end of the lifting cylinder (304), and a plurality of suction cups (306) are installed on the bottom of the lifting plate (305).