Lens positioning and clamping device

Abstract

The utility model provides a lens positioning and clamping device, and relates to the technical field of lens positioning. The lens positioning and clamping device comprises a sliding table assembly, a feeding driving assembly and a centering and clamping assembly. Wherein the centering clamping assembly is used for centering and clamping a placed lens, the feeding driving assembly is used for driving the sliding table assembly to move according to an expected target direction, positioning and alignment of the center of the lens are achieved in cooperation with a laser beam, the device can adapt to lenses of various models and sizes, the lenses of the same specification only need to be calibrated once, repeatability and consistency are high, precision is high, and the production efficiency is high. And meanwhile, the problem that time and labor are wasted due to manual positioning and alignment of the center of the lens by a worker is solved.

Description

Technical Field

[0001] This utility model relates to the field of lens positioning technology, specifically to a lens positioning and clamping device. Background Technology

[0002] When installing or processing lenses such as defocus lenses, in order to ensure that the optical center is aligned with the pupil center, guarantee the uniformity of the defocus effect, improve the accuracy of lens installation, and facilitate quality inspection and control, it is generally necessary to use laser (spot) positioning to accurately locate the center of the lens.

[0003] In existing technologies, when locating the center of a lens, it is often necessary to manually adjust the position of the lens center to align it with the laser spot.

[0004] However, each lens of different specifications needs to be calibrated and adjusted, which is not only time-consuming and laborious, but also cannot guarantee the accuracy of adjustment when manually calibrated. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a lens positioning and clamping device, which solves the problems of time-consuming, labor-intensive, and low-precision lens center positioning and locating technologies.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A lens positioning and clamping device, the device comprising:

[0010] The slide assembly is used to move the feed drive assembly and centering clamping assembly carried on it;

[0011] A feed drive assembly for controlling the amount of movement of the slide assembly in a desired direction of movement; and

[0012] Centering clamping assembly is used to center and clamp the lens.

[0013] In one embodiment, the slide assembly includes a first slide and a second slide; the first slide drives the device to move along the X-axis or Y-axis direction, and correspondingly, the second slide drives the device to move along the Y-axis or X-axis direction.

[0014] In one embodiment, both the first slide and the second slide include a fixing member and a sliding member slidably connected to the fixing member.

[0015] Preferably, the fixing member is provided with a slide rail, which cooperates with the slide groove opened on the sliding member to achieve a sliding connection.

[0016] In one embodiment, the feed drive assembly is fixed to the fixing member, and the head end of the telescopic rod of the feed drive assembly abuts against the sliding member.

[0017] In a preferred embodiment, a first protrusion and a second protrusion are respectively provided on the same side of the fixing member and the sliding member, and a through hole is opened on the first protrusion. The telescopic rod of the feed drive assembly 2 passes through the through hole and abuts against the second protrusion, and the non-telescopic section of the telescopic rod is fixedly connected to the through hole.

[0018] In one embodiment, the feed drive component is a micrometer.

[0019] In one embodiment, an elastic element is provided between the fixing element and the sliding element.

[0020] Preferably, the elastic element is a spring.

[0021] In one embodiment, the centering clamping assembly includes several sets of grippers and cylinders for driving the grippers to move in a desired direction, or the centering clamping assembly includes two sets of orthogonally arranged parallel gripper cylinders.

[0022] Preferably, there are four sets of combinations of grippers and cylinders.

[0023] In one embodiment, the centering clamping assembly further includes a support portion for carrying the lens.

[0024] Preferably, the support portion is a plurality of studs.

[0025] More preferably, a number of studs and a number of clamps are alternately arranged.

[0026] In one embodiment, the feed drive assembly is driven manually or by a motor.

[0027] Preferably, the motor is a servo motor.

[0028] In one embodiment, the device further includes a base on which the slide assembly, the feed drive assembly, and the centering clamping assembly are all located.

[0029] In a preferred embodiment, the fixing member of the first slide is fixed on the upper plane of the base, the upper surface of the sliding member of the first slide is fixedly disposed with the lower surface of the fixing member of the second slide, and the upper surface of the sliding member of the second slide is fixedly disposed with the bottom of the centering clamping assembly.

[0030] (III) Beneficial Effects

[0031] This invention provides a lens positioning and clamping device. Compared with the prior art, it has the following advantages:

[0032] The lens positioning and clamping device proposed in this utility model includes a slide assembly, a feed drive assembly, and a centering clamping assembly. The centering clamping assembly centers and clamps the placed lens, while the feed drive assembly drives the slide assembly to move in the desired direction so that the laser beam spot falls precisely at the center of the lens, achieving accurate lens centering. This lens positioning and clamping device is adaptable to various lens models and sizes, and lenses of the same specification only require one calibration, exhibiting high repeatability, consistency, and accuracy. It also avoids the time-consuming and labor-intensive problem of manually centering the lens. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the lens positioning and clamping device in the embodiment of this utility model;

[0035] Figure 2 This is a schematic diagram of the slide assembly in an embodiment of the present invention;

[0036] In the picture:

[0037] 1-Slide assembly; 2-Feed drive assembly; 3-Centering and clamping assembly; 4-Base;

[0038] 11-First slide; 12-Second slide; 31-Gripper; 32-Cylinder; 33-Support section;

[0039] 111-Fixed component; 112-Sliding component; 113-Elastic component;

[0040] 1111-Slide rail; 1121-Slide groove; 1112-First protrusion; 1122-Second protrusion. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] When installing or processing defocused lenses, it is generally necessary to use laser (spot) positioning to accurately locate the center of the lens. The main purpose of this is:

[0043] 1) Ensure the optical center is aligned with the pupil center. The optical center of the lens is crucial for optimal vision correction. Only when the optical center of the lens is accurately aligned with the wearer's pupil center can light be accurately focused on the retina after passing through the lens, providing the wearer with clear vision. If the lens center is not accurately positioned, it may cause blurred vision, eye fatigue, and long-term wear may worsen myopia or cause other vision problems.

[0044] 2) Ensure uniformity of the defocus effect. Defocus lenses utilize a special optical design to control myopia progression by creating specific defocus areas on the lens. Accurately locating and positioning the lens center ensures the precision of the defocus area's position relative to the eye, resulting in a uniform distribution of the defocus effect across the entire field of vision. This effectively inhibits abnormal axial elongation, achieving better myopia control. Otherwise, uneven distribution of the defocus area may affect its ability to control myopia progression, reducing the effectiveness of the defocus lens.

[0045] 3) Improved lens installation accuracy. During lens installation into the frame, using a laser spot to center the lens provides a precise reference. Installers can accurately fix the lens in the appropriate position within the frame based on this reference, preventing lens misalignment or displacement and ensuring the overall optical performance of the combined frame and lens meets requirements. This is crucial for improving the quality and wearing comfort of the eyeglasses.

[0046] 4) Facilitates quality inspection and control. Laser-positioned lens center provides a clear reference point for lens quality inspection. During production, the lens's quality standards can be determined by checking whether the lens center coincides with the designed theoretical center and the positional accuracy of the defocus area relative to the center. Lenses that do not meet the requirements can be adjusted or discarded promptly, thus ensuring product consistency and stability and improving overall product quality.

[0047] In existing technologies, when locating and accurately finding the center of a lens, it is often necessary to manually adjust the position of the lens center to align it with the laser spot, thereby completing the positioning and accurate finding of the lens center.

[0048] However, each lens of different specifications needs to be calibrated and adjusted, which is not only time-consuming and labor-intensive, but also cannot objectively guarantee that the center of each type of lens remains completely consistent when calibrating different lenses, resulting in the inability to guarantee the accuracy of the adjustment.

[0049] Based on this, the embodiments of this application provide a lens positioning and clamping device, which solves the problems of time-consuming, labor-intensive and low-precision lens center positioning and locating technology, and achieves the purpose of convenient and high-precision lens center positioning and locating.

[0050] The technical solutions in this application are intended to solve the above-mentioned technical problems, and the general approach is as follows:

[0051] To address the problems existing in the prior art, this application uses four sets of grippers and cylinders to center and clamp the lens, and employs two micrometers to adjust the lens's X / Y axis displacement, ensuring that the laser spot falls precisely on the center of the lens. This technical solution is adaptable to various lens models and sizes; lenses of the same specification only require one calibration, exhibiting high repeatability, consistency, and precision.

[0052] To better understand the above technical solution, the following will refer to the appendix to the instruction manual. Figures 1-2 The above technical solution will be described in detail, along with specific implementation methods.

[0053] See Figure 1 A lens positioning and clamping device includes: a slide assembly 1, a feed drive assembly 2, and a centering clamping assembly 3.

[0054] The slide assembly 1 is used to drive the feed drive assembly 2 and the centering clamping assembly 3 carried on it to move.

[0055] In one embodiment, the slide assembly 1 includes two stacked slides, namely a first slide 11 and a second slide 12. The first slide 11 drives the device to move along the X-axis / Y-axis, and correspondingly, the second slide 12 drives the device to move along the Y-axis / X-axis. In specific implementations, the direction of movement of the first slide 11 and the second slide 12 is not particularly limited and can be flexibly selected for practical convenience. For example, when the first slide 11 is configured to drive the slide along the X-axis, the corresponding second slide 12 drives the device to move along the Y-axis; when the first slide 11 is configured to drive the slide along the Y-axis, the corresponding second slide 12 drives the device to move along the X-axis. Figure 1 As shown.

[0056] In a preferred embodiment, each slide includes a fixing member 111 and a sliding member 112 slidably connected thereto, the sliding member 112 being slidable on the fixing member 111 along a desired direction (such as the X-axis / Y-axis direction).

[0057] Preferably, the fixing member 111 is provided with a slide rail 1111, which cooperates with the slide groove 1121 opened on the sliding member 112 to achieve a sliding connection, such as Figure 2 As shown. Of course, in actual implementation, the positions of slide rail 1111 and slide groove 1121 can be interchanged.

[0058] The feed drive assembly 2 is used for high-precision control of the movement of the slide assembly 1 in the desired direction. Specifically, the feed drive assembly 2 is fixed to the fixing member 111, and the head end of the telescopic rod of the feed drive assembly 2 abuts against the sliding member 112, so that the telescopic rod of the feed drive assembly 2 can drive the slide to move in the desired direction (such as the X-axis / Y-axis direction) when it extends or retracts. Figure 2 As shown

[0059] Furthermore, the fixed member 111 and the sliding member 112 are also connected by an elastic member 113. For example... Figure 2 As shown, the elastic element 113 is located near the elastic element 113, and the extension direction of the elastic element 113 is parallel to the extension direction of the telescopic rod. In actual use, the telescopic rod of the feed drive assembly 2 abuts against the sliding member 112. When the telescopic rod extends, it drives the elastic element 113 to extend. When the telescopic rod stops extending, the force of the elastic element 113 retracting and pulling back, combined with the force of the telescopic rod, fixes the slide table in the expected position. When the telescopic rod shortens, the force of the elastic element 113 being compressed, combined with the force of the telescopic rod, also fixes the slide table in the expected position. It can be seen that, under the action of its own elastic restoring force, the elastic element 113, combined with the force of the telescopic rod extending or shortening, can ensure that the slide table can be stably positioned in the required actual position after movement, thereby preventing the slide table from shaking. Preferably, the elastic element 113 is a spring.

[0060] In another embodiment, a damping structure (not shown in the figure) is provided between the fixing member 111 and the sliding member 112 to realize the elastic function of the elastic member 113.

[0061] In one embodiment, a first protrusion 1112 and a second protrusion 1122 are respectively provided on the same side of the fixing member 111 and the sliding member 112, and a through hole is formed on the first protrusion 1112. The telescopic rod of the feed drive assembly 2 passes through the through hole and abuts against the second protrusion 1122, and the non-telescopic section of the telescopic rod is fixedly connected to the through hole. Figure 2 As shown

[0062] In a preferred embodiment, the feed drive assembly 2 is a micrometer, and in this case, the micrometer's spiral measuring rod serves as the telescopic rod of the feed drive assembly 2. The micrometer offers higher precision in machining, reaching 0.01 mm, thus improving the accuracy of lens center positioning.

[0063] The centering clamping component 3 is used to center and clamp the lens to be positioned and aligned.

[0064] In one embodiment, the centering clamping assembly 3 includes a plurality of grippers 31 and a cylinder 32 that drives the grippers 31 to move along a desired direction (such as the X-axis / Y-axis direction). When the cylinder 32 is working, it drives the grippers 31 to move closer to or further away from the center of the lens, thereby clamping or releasing the lens.

[0065] In a preferred embodiment, there are four sets of combinations of grippers 31 and cylinders 32, and these four sets of combinations of grippers 31 and cylinders 32 are synchronously controlled to achieve synchronous movement, thereby achieving centering and clamping of the lens. Figure 1 As shown.

[0066] In another preferred embodiment, the centering clamping assembly 3 includes two sets of parallel gripper cylinders, which are orthogonally arranged (perpendicular to each other). The parallel gripper cylinder is one of the commonly used driving components in the prior art. Its working principle mainly includes three steps: air supply, cylinder driving, and clamping action, which will not be described in detail here.

[0067] In one embodiment, the centering clamping assembly 3 further includes a support portion 33 for supporting the lens located inside the centering clamping assembly 3. Figure 1 As shown. The support portion 33 can be a plurality of studs with the same upper end face height, and these studs are alternately arranged with a plurality of clamping jaws 31. Preferably, there are four studs, which are alternately arranged with four clamping jaws 31.

[0068] In one embodiment, the driving force of the feed drive assembly 2 can be generated manually or automatically. For example, a servo motor can be added, and the output shaft of the servo motor can be coaxially fixed with the telescopic rod of the feed drive assembly 2. When the motor rotates in the forward or reverse direction, the telescopic rod of the feed drive assembly 2 can be controlled to extend or shorten, thereby moving the slide to the expected position.

[0069] In one embodiment, the lens positioning and clamping device further includes a base 4, and the centering and clamping assembly 3, the slide assembly 1, and the feed drive assembly 2 are all located in the space above the upper plane of the base 4. Specifically, as shown... Figure 1As shown, the fixing member 111 of the first slide 11 is fixed on the upper plane of the base 4, the upper surface of the sliding member 112 of the first slide 11 is fixedly disposed with the lower surface of the fixing member 111 of the second slide 12, and the upper surface of the sliding member 112 of the second slide 12 is fixedly disposed with the bottom of the centering clamping assembly 3.

[0070] The principle and use of the lens positioning and clamping device proposed in the above embodiments and preferred embodiments of this application are described below:

[0071] First, place the lens in the middle of the multiple grippers 31, and then turn on the laser.

[0072] When the laser is turned on, the light spot is projected onto the lens. At this time, the light spot may not be exactly in the center of the lens.

[0073] By rotating the micrometer (i.e., the feed drive assembly 2), the slide moves, thereby driving the four-jaw cylinder 32 and the lens placed above it to move toward the desired position so that the light spot is accurately focused on the center of the lens.

[0074] The rotation of a micrometer can be driven manually or by a servo motor.

[0075] The lens positioning and clamping device proposed in the above embodiments of this application uses a centering clamping component 3 to center and clamp the placed lens, and a feed drive component 2 to drive the slide component 1 to move in the expected target direction. In addition, the laser beam is used to accurately locate the center of the lens. It can be adapted to lenses of various models and sizes, and lenses of the same specification only need to be calibrated once. It has high repeatability, consistency and accuracy, and avoids the time-consuming and laborious problem caused by manual positioning and locating of the lens center.

[0076] In summary, compared with existing technologies, it has the following beneficial effects:

[0077] 1. The lens positioning and clamping device proposed in this utility model includes: a slide assembly, a feed drive assembly, and a centering clamping assembly. The centering clamping assembly centers and clamps the placed lens, while the feed drive assembly drives the slide assembly to move in the expected direction so that the laser beam spot falls precisely at the center of the lens, achieving accurate lens centering. This lens positioning and clamping device can adapt to various lens models and sizes, and lenses of the same specification only need to be calibrated once, exhibiting high repeatability, consistency, and accuracy. It also avoids the time-consuming and labor-intensive problem of manually centering the lens.

[0078] 2. The lens positioning and clamping device proposed in this utility model preferably uses a micrometer as the feed drive component, which improves the accuracy of lens center positioning. At the same time, the feed drive component can be driven manually or by a motor, which solves the problem of time-consuming and labor-intensive manual positioning of the lens center in the prior art.

[0079] 3. The lens positioning and clamping device proposed in this utility model has a centering clamping component that, together with the slide assembly, can be adapted to lenses of various models and sizes. Lenses of the same specification only need to be calibrated once, with high repeatability, consistency and precision.

[0080] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0081] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lens positioning and clamping device, characterized in that, The device includes: The slide assembly (1) is used to drive the feed drive assembly (2) and centering clamping assembly (3) carried on it to move; Feed drive assembly (2) for controlling the amount of movement of the slide assembly (1) in the desired direction of movement; and Centering clamping assembly (3) is used to center and clamp the lens.

2. The apparatus as claimed in claim 1, characterized in that, The slide assembly (1) includes a first slide (11) and a second slide (12); the first slide (11) drives the device to move along the X-axis or Y-axis direction, and the second slide (12) drives the device to move along the Y-axis or X-axis direction.

3. The apparatus as described in claim 2, characterized in that, The first slide (11) and the second slide (12) both include a fixing member (111) and a sliding member (112) slidably connected to the fixing member (111).

4. The apparatus as described in claim 3, characterized in that, The feed drive assembly (2) is fixed on the fixing member (111), and the head end of the telescopic rod of the feed drive assembly (2) abuts against the sliding member (112).

5. The apparatus as described in claim 4, characterized in that, The feed drive assembly (2) is a micrometer.

6. The apparatus as claimed in claim 4, characterized in that, An elastic element (113) is provided between the fixing element (111) and the sliding element (112).

7. The apparatus as claimed in claim 1, characterized in that, The centering clamping assembly (3) includes several sets of jaws (31) and a cylinder (32) that drives the jaws (31) to move along a desired direction.

8. The apparatus as claimed in claim 7, characterized in that, The centering clamping assembly (3) also includes a support (33) for carrying the lens.

9. The apparatus as claimed in claim 1, 4, or 5, characterized in that, The feed drive assembly (2) is driven manually or by a motor.

10. The apparatus as claimed in claim 1, characterized in that, The device also includes a base (4), on which the slide assembly (1), the feed drive assembly (2), and the centering clamping assembly (3) are all located.

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