Contact lens detection equipment

Abstract

The utility model discloses contact lens detection equipment. The contact lens detection equipment comprises a supporting rod, a contact lens carrying disc and a detection camera located above the supporting rod, a top annular light source, a coaxial light source and a bottom annular light source are coaxially arranged on the supporting rod in sequence from top to bottom in the height direction of the supporting rod, and the contact lens carrying disc is located between the coaxial light source and the bottom annular light source. The contact lens defect detection device can be used for detecting various defects of contact lenses, is wide in detection range, and can ensure the accuracy of detection results.

Description

Technical Field

[0001] This utility model relates to the field of contact lens testing technology, and in particular to a contact lens testing device. Background Technology

[0002] Contact lenses are made of oxygen-permeable plastic materials and can be worn directly on the cornea of ​​the user's eye to correct the user's vision. Before wearing contact lenses, it must be ensured that the surface is smooth and flat. If there are contaminants such as dust, particles or lens fragments, wearing them will cause a foreign body sensation and may even damage the user's cornea. Therefore, contact lenses must be tested after they are manufactured.

[0003] Existing contact lens inspection methods have limited ranges of defect types and cannot guarantee the accuracy of inspection results. Therefore, there is a need to provide a contact lens inspection device to solve the above problems. Utility Model Content

[0004] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a contact lens testing device that can handle the inspection of various defects in contact lenses, has a wide testing range, and can ensure the accuracy of its testing results.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a contact lens testing device, including a support rod, a contact lens carrier, and a testing camera located above the support rod; the support rod is provided with a top ring light, a coaxial light source, and a bottom ring light arranged coaxially from top to bottom along its height direction, and the contact lens carrier is located between the coaxial light source and the bottom ring light.

[0006] Furthermore, the contact lens carrier includes multiple contact lens placement slots and connecting sections between adjacent slots. The contact lens placement slots are made of transparent material. By providing multiple slots, multiple contact lenses can be tested simultaneously, thereby improving testing efficiency. The thickness of the connecting section on the contact lens carrier is greater than the thickness of the placement slots to ensure support for the slots, keeping the surface of the carrier flat and effectively preventing any impact on testing accuracy due to partial depressions.

[0007] Furthermore, it also includes a protective box, within which the support rod, top ring light, coaxial light source, and bottom ring light are all located. The protective box effectively prevents light leakage from each light source and also avoids interference from other external light sources with the internal light sources.

[0008] Furthermore, the lower part of the protective case has a horizontally penetrating loading groove, which corresponds to the position of the contact lens carrier. By providing the loading groove, the contact lens carrier can enter the imaging and testing position from the side of the protective case without disassembling the protective case, effectively improving the loading efficiency of contact lenses.

[0009] Furthermore, guide rails are horizontally arranged on the two opposite walls of the feeding clearance groove, and a feeding assembly is slidably mounted on the guide rails. Guided by the guide rails, the feeding assembly moves towards or away from the protective box. This structure facilitates the feeding of contact lenses, thereby improving testing efficiency.

[0010] Furthermore, the loading assembly includes carrier sliders that match the guide rails, and tray placement slots are provided on opposite sides of the two carrier sliders. When a contact lens tray with a contact lens already placed is placed in the tray placement slot, pushing the carrier sliders towards the inside of the protective case will move the contact lens tray to the corresponding detection camera position, enabling rapid tray replacement and contact lens loading.

[0011] Furthermore, each of the carrier sliders is equipped with a handle for easy pulling, and a limiting block is provided on the side of the guide rail away from the contact lens tray loading direction. The handles facilitate the operation by allowing workers to pull out the carrier slider and the inspected contact lens tray located on it.

[0012] Furthermore, an electromagnet is respectively installed on the opposite side of the limiting block and the supporting slider. When the supporting slider and the contact lens carrier on it are pushed to abut against the limiting block, the contact lens carrier is precisely positioned at the shooting position of the detection camera, energizing the electromagnet, thereby causing the limiting block and the supporting slider to be tightly magnetically attracted together. This effectively ensures that the contact lens carrier will not move during subsequent shooting by the detection camera, ensuring the accuracy of the contact lens being photographed and detected.

[0013] Furthermore, a pressing assembly is provided on the top of the carrier slider. The pressing assembly includes a vertically arranged fixed rod, a lower pressure plate sleeved on it, and fixed blocks and abutment blocks located at the upper and lower ends of the fixed rod. A compression spring is sleeved on the portion of the fixed rod between the fixed block and the lower pressure plate. One end of the compression spring is fixed to the fixed block, and the other end is connected to the lower pressure plate. When the contact lens tray is placed on the carrier slider, the lower pressure plate is rotated to position it closer to the contact lens tray. At this time, the lower pressure plate presses the contact lens tray firmly onto the carrier slider under the elastic force of the compression spring. This allows the contact lens tray to move with the carrier slider to the detection camera's image capture position as the carrier slider moves. Simultaneously, during this movement, relative movement occurs between the contact lens tray and the carrier slider, ensuring the accuracy of subsequent camera image capture.

[0014] Furthermore, the support rod is fitted with multiple partition support columns and a mounting plate, with the mounting plate horizontally positioned between two adjacent partition support columns. The top ring light, coaxial light source, and bottom ring light are correspondingly mounted on the mounting plate. The partition support columns separate the various light sources and position them at a specified height, ensuring that the emitted light meets the requirements of the detection camera to the greatest extent. The mounting plate is fixed between two partition support columns, preventing the positions of the light sources on the mounting plate from easily shifting. After adjustment, it ensures that the axis of each light source remains on a vertical straight line, thereby guaranteeing the accuracy of subsequent detection by the detection camera.

[0015] The beneficial effects of this utility model are:

[0016] In this invention, the top ring light, coaxial light source, and bottom ring light work together to increase the number of light sources, allowing the detection camera located at the top of the support rod to capture a wider and clearer range of contact lenses. This makes it easier for an external computer to compare and detect them, enabling the inspection of various defects in contact lenses and ensuring the accuracy of the detection results. Attached Figure Description

[0017] Figure 1 This is a partial structural isometric view of an embodiment of the present invention;

[0018] Figure 2 This is an axonometric view of the overall structure of an embodiment of the present invention;

[0019] Figure 3 This is a partial structural schematic diagram of an embodiment of the present utility model;

[0020] Figure 4 for Figure 3 A magnified structural diagram of A in the middle;

[0021] Figure 5 This is a partial top view of an embodiment of the present utility model;

[0022] In the diagram: 1. Protective box; 2. Feeding clearance groove; 3. Support rod; 4. Divider support column; 5. Locking screw; 6. Mounting plate; 7. Clearance groove; 8. Top ring light; 10. Coaxial light source; 11. Bottom ring light; 12. Contact lens carrier; 121. Contact lens placement slot; 122. Connecting section; 13. Feeding assembly; 131. Guide rail; 132. Loading slider; 133. Carrier placement slot; 134. Limiting block; 135. Handle; 136. Electromagnet; 14. Pressing assembly; 141. Fixing rod; 142. Fixing block; 143. Lower pressure plate; 144. Lower pressure spring; 145. Abutment block. Detailed Implementation

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0024] See appendix Figures 1 to 5 As shown, a contact lens testing device in this embodiment includes a support rod 3, a contact lens carrier 12, and a testing camera located above the support rod 3. Along its height direction, the support rod 3 is coaxially arranged with a top ring light 8, a coaxial light source 10, and a bottom ring light 11. The contact lens carrier 12 is located between the coaxial light source 10 and the bottom ring light 11. By adding multiple light sources, the testing camera located at the top of the support rod 3 can capture a wider and clearer range of contact lenses, which is more conducive to comparative testing by an external computer.

[0025] For detecting various defects that may occur after contact lens production, such as missing edges, tears, black spots, air bubbles, missing patterns (only for colored contact lenses), contamination, product overlap, product voids, protruding edges, and rough edges, clearer images can lead to more accurate subsequent inspection results.

[0026] Specifically, when multiple light sources are set up, the axes of the light sources and the center of the contact lens carrier 12 are on the same vertical line. The light from the bottom ring light 11 shines from below the contact lens carrier 12 onto the contact lens in the contact lens placement slot 121. Then, the light shining on the contact lens passes through the contact lens and, together with the coaxial light and the top ring light 8, enters the lens of the inspection camera. The inspection camera operates, taking pictures of the contact lens carrier 12 containing the contact lenses, and the inspection camera can upload the captured pictures to an external computer in real time. When there are defective features on the surface of the contact lens, the defective features and the surrounding non-defective parts will produce obvious differences in brightness under the illumination of the light, which can quickly screen out defective products.

[0027] The contact lens carrier 12 includes multiple contact lens placement slots 121 and connecting sections 122 connecting adjacent contact lens placement slots 121. The contact lens placement slots 121 are made of transparent material. By providing multiple contact lens placement slots 121, multiple contact lenses can be tested in the same batch, thereby improving the testing efficiency. The thickness of the connecting section 122 on the contact lens carrier 12 is greater than the thickness of the contact lens placement slots 121 to ensure support for the slots 121, keeping the surface of the contact lens carrier 12 always flat and effectively preventing any impact on the testing accuracy of the contact lenses due to partial depressions.

[0028] In some embodiments, the contact lens placement slot 121 is a downwardly protruding arc-shaped slot, and the entire contact lens carrier 12 can be made of transparent material to avoid obstructing the illumination light emitted by the bottom ring light 11, thereby affecting the quality inspection of the contact lenses.

[0029] It also includes a protective box 1, within which the support rod 3, the top ring light 8, the coaxial light source 10, and the bottom ring light 11 are all located. The protective box 1 effectively prevents light leakage from each light source and also avoids interference from other external light sources to the internal light sources.

[0030] The lower part of the protective case 1 has a horizontally penetrating loading groove 2, which corresponds to the position of the contact lens carrier 12. By providing the loading groove 2, the contact lens carrier 12 can enter the imaging and detection position from the side of the protective case 1 without disassembling the protective case 1, effectively improving the loading efficiency of contact lenses.

[0031] A guide rail 131 is horizontally arranged on two opposite groove walls inside the feeding groove 2, and a feeding assembly 13 is slidably arranged on the guide rail 131. The feeding assembly 13 moves toward or away from the protective box 1 under the guidance of the guide rail 131. This structure facilitates the feeding of contact lenses, thereby improving their detection efficiency.

[0032] In some embodiments, the feeding clearance groove 2 is opened through the protective box 1 along its length direction, and the guide rail 131 is arranged along the length direction of the protective box 1.

[0033] The loading assembly 13 includes a carrier slider 132 that matches the guide rail 131. A tray placement groove 133 is provided on one side of each of the two carrier sliders 132 facing each other. A contact lens tray 12, with the contact lens already placed on it, is placed in the tray placement groove 133. By pushing the carrier slider 132 towards the inside of the protective case 1, the contact lens tray 12 can be pushed to the corresponding detection camera position, enabling quick tray replacement and contact lens loading.

[0034] Each of the carrier sliders 132 is provided with a handle 135 for easy pulling, and a limiting block 134 is provided on the side of the guide rail 131 away from the feeding direction of the contact lens carrier 12. The handles 135 make it convenient for operators to pull out the carrier sliders 132 and the tested contact lens carriers 12 located on them, thus facilitating operation.

[0035] An electromagnet 136 is respectively installed on the opposite side of the limiting block 134 and the carrying slider 132. When the carrying slider 132 and the contact lens carrier 12 thereon are pushed to abut against the limiting block 134, the contact lens carrier 12 is precisely positioned at the shooting position of the detection camera, which energizes the electromagnet 136, thereby making the limiting block 134 and the carrying slider 132 magnetically attracted together. This effectively ensures that the contact lens carrier 12 will not move during subsequent shooting by the detection camera, thus ensuring the accuracy of the contact lens being photographed and detected.

[0036] A pressing assembly 14 is provided on the top of the bearing slider 132. The pressing assembly 14 includes a vertically arranged fixed rod 141, a lower pressure plate 143 sleeved on it, and fixed blocks 142 and abutment blocks 145 located at the upper and lower ends of the fixed rod 141. A compression spring 144 is sleeved on the part of the fixed rod 141 located between the fixed block 142 and the lower pressure plate 143. One end of the pressure spring 144 is fixed to the fixing block 142, and the other end is connected to the pressure plate 143. When the contact lens tray 12 is placed on the carrier slider 132, the pressure plate 143 is rotated to position it close to the side of the contact lens tray 12. At this time, the pressure plate 143 presses the contact lens tray onto the carrier slider 132 under the elastic force of the pressure spring 144, so that the contact lens tray 12 can move with the carrier slider 132 to the detection camera's image detection position when the carrier slider 132 moves. At the same time, during this movement, there is relative movement between the contact lens tray 12 and the carrier slider 132, ensuring the accuracy of subsequent camera image detection.

[0037] Multiple separating support columns 4 and a mounting plate 6 are fitted onto the support rod 3, with the mounting plate 6 horizontally positioned between two adjacent separating support columns 4. The top ring light 8, coaxial light source 10, and bottom ring light 11 are correspondingly mounted on the mounting plate 6. The separating support columns 4 separate the various light sources and position them at a specified height, ensuring that the emitted light meets the requirements of the detection camera to the greatest extent. The mounting plate 6 is fixed between two separating support columns 4, preventing the positions of the various light sources on the mounting plate 6 from easily moving. After adjustment, it ensures that the axis of each light source always remains on a vertical straight line, thereby ensuring the accuracy of subsequent detection by the detection camera.

[0038] In some embodiments, the side of the partition support column 4 away from the mounting plate 6 is locked to the protective box 1 by locking screws 5 to vertically fix the support rod 3 inside the protective box 1, ensuring that the support rod 3 and the various light sources on it will not tip over or become misaligned during transportation. Each mounting plate 6 for mounting light sources is provided with a clearance groove 7 to ensure that the light source will not block the light when it is illuminating.

[0039] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A contact lens testing device, characterized in that: It includes a support rod, a contact lens carrier, and a detection camera located above the support rod; the support rod is coaxially arranged with a top ring light, a coaxial light source, and a bottom ring light from top to bottom along its height direction, and the contact lens carrier is located between the coaxial light source and the bottom ring light.

2. The contact lens testing device according to claim 1, characterized in that: The contact lens carrier includes multiple contact lens placement slots and a connecting section connecting two adjacent contact lens placement slots. The contact lens placement slots are made of transparent material.

3. The contact lens testing device according to claim 1, characterized in that: It also includes a protective box, in which the support rod, top ring light, coaxial light source and bottom ring light are all located.

4. The contact lens testing device according to claim 3, characterized in that: The lower part of the protective box has a horizontally through-hole for feeding, and the feeding groove corresponds to the position of the contact lens carrier.

5. The contact lens testing device according to claim 4, characterized in that: The feeding clearance groove has two horizontally arranged guide rails on its two opposite groove walls, and a feeding component is slidably arranged on the guide rails.

6. The contact lens testing device according to claim 5, characterized in that: The feeding assembly includes a load-bearing slider that matches the guide rail, and a tray placement groove is provided on one side of each of the two load-bearing sliders.

7. The contact lens testing device according to claim 6, characterized in that: Each of the carrier sliders is provided with a handle for easy pulling, and a limiting block is provided on the side of the guide rail away from the feeding direction of the contact lens tray.

8. The contact lens testing device according to claim 7, characterized in that: An electromagnet is respectively installed on the opposite side of the limiting block and the bearing slider.

9. The contact lens testing device according to claim 6, characterized in that: A pressing assembly is provided on the top of the bearing slider. The pressing assembly includes a vertically arranged fixed rod, a lower pressure plate sleeved on it, and fixed blocks and abutment blocks located at the upper and lower ends of the fixed rod. A compression spring is sleeved on the part of the fixed rod located between the fixed block and the lower pressure plate.

10. A contact lens testing device according to claim 3, characterized in that: The support rod is fitted with multiple partition support columns and mounting plates, and the mounting plates are horizontally located between two adjacent partition support columns. The top ring light, coaxial light source and bottom ring light are respectively set on the mounting plates.

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