Optical lens centering and edging device

Abstract

The application provides an optical lens centering and edging device, which comprises a workbench, a centering assembly and an edging assembly arranged on the workbench; the centering assembly comprises a translation component, a rotation component arranged on the translation component and a centering component arranged on the rotation component; the centering component comprises a central shaft, a plurality of main centering joint blocks and a secondary centering joint block arranged circumferentially around the central shaft, a first driving unit connected with the main centering joint blocks and a second driving unit connected with the secondary centering joint block; the plurality of main centering joint blocks are enclosed to form a ring-shaped joint coaxially arranged with the central shaft; the secondary centering joint block is arranged below the main centering joint blocks; the first driving unit is used to drive the main centering joint blocks to move close to or away from the central shaft; and the second driving unit is used to drive the secondary centering joint block to move close to or away from the central shaft and close to or away from the main centering joint blocks. The application solves the problem of lacking an optical lens centering and edging device with high centering precision and efficiency and wide application range in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical lens production and processing, and particularly relates to an optical lens centering and edging device. BACKGROUND

[0002] An optical lens is a key component of various optical imaging systems. The quality of the optical lens directly affects the performance of the imaging system, and even determines the success or failure. Since various aberration defects exist in the optical lens in theory, a combination of optical lenses with different shapes and materials is often used in the design of the optical lens, so as to correct various aberrations of the optical lens, and to obtain high-quality imaging quality. However, there are still many errors from the design to the actual manufacturing, and various part manufacturing errors, lens assembly errors and the like are inevitable in the actual manufacturing process of the optical lens. Although the parts such as the lens, the lens barrel and the spacer ring which affect the optical imaging quality generally have high tolerance requirements, even so, the remaining tolerance will still affect the imaging quality of the entire lens. The quality requirements of modern optical systems are getting higher and higher, and for some special high-precision purposes, the optical system quality degradation caused by a few microns of lens eccentricity is intolerable, so the precise control and adjustment process of the lens eccentricity has become a bottleneck of the optical lens manufacturing technology.

[0003] The existing lens centering methods include a lens surface direct reflection image centering method, a ball center self-accurate image centering method, an optical television centering method and a mechanical centering method. The lens surface direct reflection image centering method has simple required equipment and convenient operation, but has low precision and narrow application range. The ball center self-accurate image centering method and the optical television centering method have high precision, but have high requirements for equipment and have lower centering efficiency than the mechanical centering method. Therefore, in the industrial production of a large number of lenses, the mechanical centering method is still the most common method.

[0004] However, the centering precision of the mechanical centering method is affected by the centering coefficient, and if the centering coefficient is less than a certain value, the precision of the mechanical centering is low, so the application range of the mechanical centering and edging device is not enough, and it is only suitable for lenses with a large centering coefficient. The centering coefficient is determined by the friction coefficient between the centering clamp joint and the lens, the curvature radius of the lens and the joint diameter of the centering clamp. The friction coefficient is usually constant, so when the mechanical centering clamp is determined, the type and specification of the lens to be processed by the mechanical centering clamp are also determined, which leads to a narrow application range of the mechanical centering clamp and low universality. SUMMARY

[0005] Therefore, the present application aims to provide an optical lens centering and edging device, which aims to solve the problem that there is no optical lens centering and edging device with high centering precision and efficiency and wide application range in the prior art.

[0006] According to the optical lens centering and edging device, the two centering assemblies are symmetrically arranged along the length direction of the workbench, and the two edging assemblies are symmetrically arranged along the width direction of the workbench.

[0007] The centering assembly comprises a translation component, a rotating component arranged on the translation component, and a centering component arranged on the rotating component, wherein the centering component comprises a central shaft, a plurality of main centering joint blocks and a plurality of auxiliary centering joint blocks which are arranged circumferentially around the central shaft, a first driving unit connected with the main centering joint blocks, and a second driving unit connected with the auxiliary centering joint blocks.

[0008] The main centering joint blocks and the auxiliary centering joint blocks are in arc shape, and the plurality of main centering joint blocks are arranged to form a ring-shaped joint coaxially arranged around the central shaft, the auxiliary centering joint blocks are arranged below the main centering joint blocks, the first driving unit is used to drive the main centering joint blocks to move close to or away from the central shaft, and the second driving unit is used to drive the auxiliary centering joint blocks to move close to or away from the central shaft while moving close to or away from the main centering joint blocks.

[0009] In addition, the optical lens centering and edging device according to the above-mentioned embodiments of the present application can further have the following additional technical features:

[0010] Further, the first driving unit comprises a first screw rod, a first sliding block sleeved on the first screw rod, and a first connecting plate having one end connected with the first sliding block and the other end connected with the middle part of the main centering joint block, one end of the central shaft is connected with the rotating component, a driving bevel gear is arranged on the side of the central shaft close to the rotating component, and a first driven bevel gear adapted to the driving bevel gear is arranged on the side of the first screw rod close to the central shaft.

[0011] Further, the centering assembly further comprises a fixed circular table, the fixed circular table has a mounting groove, the first driving unit and the second driving unit are arranged in the mounting groove, one end of the central shaft penetrates through the fixed circular table and is connected with the rotating component, the driving bevel gear is arranged at the bottom of the mounting groove, and one end of the first screw rod is rotationally connected with the side wall of the mounting groove.

[0012] Further, the second driving unit comprises a second screw rod, a second sliding block sleeved on the second screw rod, and a second connecting plate having one end connected with the middle part of the auxiliary centering joint block and the other end arranged on the second sliding block.

[0013] The second screw is provided with a second driven bevel gear matched with the driving bevel gear at one end close to the central shaft, and is rotationally connected with the side wall of the mounting groove at the other end; the top of the second sliding block outwardly extends a connecting part, the top of the connecting part is provided with a groove matched with the second connecting plate, and the side of the connecting part facing the central shaft is provided with an avoiding groove penetrating through the connecting part; the side wall of the mounting groove extends an auxiliary block towards the central shaft, and the auxiliary block is provided with a bevel part away from the side wall of the mounting groove.

[0014] The bevel part is at least partially located at the bottom of the avoiding groove, the second connecting plate is located in the groove and on the bevel part at the end away from the auxiliary block, and is provided with an inclined surface matched with the bevel part.

[0015] Further, the bottom of the first sliding block and the second sliding block is provided with a sliding groove, the mounting groove is provided with a guide block matched with the sliding groove, the axis of the first screw and the second screw intersects with the axis of the central shaft, and the length direction of the guide block is consistent with the axis direction of the first screw or the second screw.

[0016] Further, the curvature of the main center joint block is consistent with that of the auxiliary center joint block, the auxiliary center joint block is located between two adjacent main center joint blocks, and the main center joint block and the auxiliary center joint block are both centrally symmetrically arranged relative to the axis of the central shaft.

[0017] Further, the bottom of the second connecting plate is provided with a limiting block on both sides, the side wall of the groove is provided with a guide groove matched with the limiting block, the guide groove is provided with an elastic member, and the two ends of the elastic member are respectively abutted against the top of the limiting block and the inner wall of the top of the guide groove.

[0018] Further, the central shaft is provided with a vacuum suction hole at one end close to the main center joint block, and the other end of the central shaft is connected with a vacuum suction device.

[0019] Further, the translation component comprises a translation driving member, a telescopic rod arranged on the translation driving member, and a transmission rod having one end connected with the telescopic rod and the other end connected with the rotation component;

[0020] The top of the telescopic rod is provided with a sliding groove, and the side of the transmission rod close to the telescopic rod is provided with a limiting circular table matched with the sliding groove, and the limiting circular table is arranged in the sliding groove.

[0021] The rotating part comprises a fixed seat connected with the transmission rod, a rotating driving part arranged on the fixed seat, and a rotating shaft connected with the rotating driving part, the rotating shaft is connected with the central shaft, a spring is sleeved on the transmission rod, and the two ends of the spring are respectively abutted against the bottom of the fixed seat and the top of the telescopic rod.

[0022] Further, the edging assembly comprises an axial translation part, a rotating part arranged on the axial translation part, and a polishing part arranged on the rotating part.

[0023] The present application, by the plurality of main centering joint blocks surrounding the annular joint abutting against the lens, and then by the translation part applying a certain pressure to the lens, and then under the action of the rotating part, the annular joint rotates, when the lens is centered, the contact points between the lens and the annular joint are less, and the force balance cannot be achieved, and then under the action of the centering force perpendicular to the central axis decomposed from the extrusion force, the lens moves to overcome the friction, when the lens stops moving and under the rotation and shaking of the rotating part, the lens is stable at the current position and remains unchanged, which indicates that the lens has completed centering, at this time, due to the symmetrical structure of the lens itself, the forces on both sides are balanced, so that the lens can be stably maintained at the current position. Further, the lens is polished by the edging device. When the current size of the annular joint and the centering angle corresponding to the lens specification are small, the first driving unit drives the main joint centering blocks away from the central axis, so that the plurality of main joint centering blocks form a larger diameter joint, thereby effectively improving the centering angle, realizing high-precision mechanical centering of the lens, and the secondary joint centering blocks also move away from the central axis under the action of the second driving unit, and move along the length direction of the central axis, so that the secondary joint centering blocks fill the gaps between the adjacent main joint centering blocks, and the secondary joint centering blocks and the main joint centering blocks jointly form a new centering joint, and ensure the contact area and gap between the centering joint and the lens, to ensure the stability and accuracy of the centering and edging, and increase the application range of the centering and edging device. The mechanical centering method itself has high centering efficiency. Therefore, the present application solves the problem of lacking a centering and edging device for optical lenses with high centering precision and efficiency and wide application range in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure schematic view of the centering and edging device for optical lenses in an embodiment of the present application;

[0025] Figure 2 It is a structure schematic view of the centering part in an embodiment of the present application;

[0026] Figure 3 It is a structure schematic view of the centering part hidden behind the fixed circular table in an embodiment of the present application;

[0027] Figure 4 Assembly view of the main centering joint block and the first driving unit in one embodiment of the present application;

[0028] Figure 5 Assembly view of the main centering joint block and the first driving unit in one embodiment of the present application;

[0029] Figure 6 Assembly view of the main centering joint block and the first driving unit in one embodiment of the present application; Figure 5 Structure view of the second screw and the second slider hidden;

[0030] Figure 7 Structure view of the second slider in one embodiment of the present application;

[0031] Figure 8 Assembly view of the translation part and the rotation part in one embodiment of the present application;

[0032] Figure 9 Assembly view of the translation part and the rotation part in one embodiment of the present application; Figure 8 Cross-sectional view of the translation part and the rotation part in one embodiment of the present application;

[0033] Figure 10 Structure view of the edging assembly in one embodiment of the present application.

[0034] Explanation of main component symbols:

[0035] DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present application, a more complete understanding of the present application can be had by reference to the following description and the accompanying drawings, in which several embodiments of the present application are illustrated. The present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0037] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right", and the like are merely used for the purpose of explanation.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0039] Referring to Figures 1 to 10 , the optical lens centering and edging device in an embodiment of the present application is shown, which comprises a workbench 10, a centering assembly 20 and an edging assembly 30 arranged on the workbench 10, two centering assemblies 20 are symmetrically arranged along the length direction of the workbench 10, and two edging assemblies 30 are symmetrically arranged along the width direction of the workbench 10;

[0040] The centering assembly 20 comprises a translation component 21, a rotation component 22 arranged on the translation component 21, and a centering component 23 arranged on the rotation component 22, the centering component 23 comprises a central shaft 231, a main centering joint block 232 and a secondary centering joint block 233 arranged circumferentially around the central shaft 231, a first driving unit 234 connected with the main centering joint block 232, and a second driving unit 235 connected with the secondary centering joint block 233;

[0041] The main centering joint block 232 and the secondary centering joint block 233 are in arc shape, and a plurality of main centering joint blocks 232 are enclosed to form a circular ring joint coaxially arranged with the central shaft 231, the secondary centering joint block 233 is arranged below the main centering joint block 232, the first driving unit 234 is used to drive the main centering joint block 232 to approach or move away from the central shaft 231, and the second driving unit 235 is used to drive the secondary centering joint block 233 to approach or move away from the central shaft 231 while approaching or moving away from the main centering joint block 232.

[0042] It can be understood that the circular ring joint surrounded by the plurality of main centering joint blocks 232 abuts against the lens, and then the translational component 21 applies a certain pressure to the lens, and then under the action of the rotating component 22, the circular ring joint rotates, when the lens is centered, the contact points of the lens and the circular ring joint are less, and the force balance cannot be achieved, and then under the action of the centering force perpendicular to the axis of the center shaft 231 decomposed by the extrusion force, the lens moves to overcome the friction, when the lens stops moving and under the rotation and shaking of the rotating component 22, the lens is stable at the current position and remains unchanged, which indicates that the lens has completed centering, at this time, due to the symmetrical structure of the lens itself, the forces on both sides are balanced, so that the lens can be stably maintained at the current position. Then the lens is polished by the edging device. When the current size of the circular ring joint and the centering angle corresponding to the lens specification are small, the first driving unit 234 drives the main joint centering block away from the center shaft 231, and then the plurality of main joint centering blocks form a larger diameter joint, thereby effectively improving the centering angle, realizing high-precision mechanical centering of the lens, and the secondary joint centering block will also move away from the center shaft 231 under the action of the second driving unit 235, and move along the length direction of the center shaft 231, thereby the secondary joint centering block fills the gap between the adjacent main joint centering blocks, so that the secondary joint centering block and the main joint centering block jointly form a new centering joint, and ensure the contact area and gap between the centering joint and the lens, to ensure the stability and accuracy of the centering and edging, and increase the application range of the centering and edging device, and the mechanical centering method itself has high centering efficiency. Therefore, the present application solves the problem of lacking a centering and edging device for optical lenses with high centering precision and efficiency and wide application range in the prior art.

[0043] It should be noted that the centering coefficient is related to the joint diameter and the radius of curvature of the lens. When the lens size is determined, the position of the main joint centering block is adjusted to increase the joint diameter, so as to increase the centering coefficient, thereby ensuring the accuracy of the mechanical centering method. In addition, the contact area between the joint and the lens affects the stability and consistency of the lens centering. When the contact area is too small, the local pressure will increase, which will cause the lens surface to be easily damaged. When the contact area is too large, it will increase the static friction between the joint and the lens, thereby reducing the lens centering speed, or the friction is too large, so that the lens cannot be mechanically centered. Therefore, the contact area between the joint and the lens needs to be reasonably adjusted, and then the additional secondary joint centering block is provided, so that when a larger joint diameter is required, the lens volume is usually larger, so the secondary joint centering block and the main joint centering block are used to increase the contact area between the joint and the lens. When the required joint diameter is moderate and the contact area does not need to be increased, the main joint centering block moves outward, but the secondary joint centering block does not move to the same horizontal plane as the main joint centering block, that is, the height of the secondary joint centering block is lower than that of the main joint centering block. At this time, the contact area between the joint and the lens does not change. Then, the secondary joint centering block and the main joint centering block can be reasonably adjusted within a certain range of joint diameters, and the contact area can be reasonably adjusted within a certain range.

[0044] In addition, by way of example and not limitation, in some optional embodiments, a plurality of multiple secondary joint centering blocks can also be provided, that is, a plurality of secondary joint centering block groups with different heights are arranged below the main joint centering block, thereby further increasing the application range of the centering and edging device, and by reasonably adjusting the time of cooperation between each secondary joint centering block and the main joint centering block, the accuracy and effect of the centering and edging device can be improved when the joint diameter is different.

[0045] Additionally, the first driving unit 234 comprises a first screw rod 2341, a first sliding block 2342 sleeved on the first screw rod 2341, a first connecting plate 2343 having one end connected with the first sliding block 2342 and the other end connected with the middle part of the main centering block joint, the center shaft 231 having one end connected with the rotating part 22, the center shaft 231 being provided with a driving bevel gear 236 on the side close to the rotating part 22, and the first screw rod 2341 being provided with a first driven bevel gear 2344 on the side close to the center shaft 231. In the specific implementation, the center shaft 231 is driven to rotate by the rotating part 22, the center shaft 231 drives all the first screw rods 2341 to rotate through the driving bevel gear 236 and the first driven bevel gear 2344, and then the first sliding block 2342 drives the main centering joint block 232 to move close to or away from each other through the cooperation of the first screw rod 2341 and the threaded hole on the first sliding block. Since the movement of all the main centering joint blocks 232 is driven by the same driving bevel gear 236, the consistency of the movement of the main centering joint blocks 232 is ensured, and then the main centering joint blocks 232 are still arranged in a central symmetry after the joint diameter is adjusted, so that the force at each main centering joint block 232 is balanced and offset after the lens centering is completed, that is, the centering effect of the lens is ensured. Since it is driven by the same driving bevel gear 236, the assembly error adjustment does not need to consider various assembly conditions, and the influence of the assembly error on the lens centering is further avoided, and the precision of the mechanical centering is ensured.

[0046] Specifically, the centering assembly 20 further comprises a fixed circular table 24, the fixed circular table 24 having a mounting groove 241, the first driving unit 234 and the second driving unit 235 being arranged in the mounting groove 241, the center shaft 231 having one end penetrating through the fixed circular table 24 and being connected with the rotating part 22, the driving bevel gear 236 being arranged at the bottom of the mounting groove 241, and the first screw rod 2341 having one end rotatably connected with the side wall of the mounting groove 241. In the specific implementation, the fixed circular table 24 is arranged to easily arrange the first driving unit 234 and the second driving unit 235, to provide support for them, and to protect the parts from damage caused by external impact.

[0047] Additionally, the second driving unit 235 comprises a second screw rod 2351, a second sliding block 2352 sleeved on the second screw rod 2351, and a second connecting plate 2353 having one end connected with the middle part of the auxiliary centering joint block 233 and the other end arranged on the second sliding block 2352.

[0048] The second screw rod 2351 is provided with the second driven bevel gear 2354 matched with the driving bevel gear 236 at one end close to the central shaft 231, and is rotationally connected with the side wall of the mounting groove 241 at the other end. The top of the second sliding block 2352 outwardly extends a connecting portion 2355, the top of which is provided with a groove 2356 matched with the second connecting plate 2353. The side of the connecting portion 2355 facing the central shaft 231 is provided with an avoiding groove 2357 penetrating through the connecting portion 2355. The side wall of the mounting groove 241 extends an auxiliary block 242 towards the central shaft 231, and the auxiliary block 242 is provided with a beveled portion 2421 away from the side wall of the mounting groove 241.

[0049] The beveled portion 2421 is at least partially located at the bottom of the avoiding groove 2357. The second connecting plate 2353 is located in the groove 2356 at the end away from the auxiliary centering joint block 233 and is located on the beveled portion 2421, and is provided with an inclined surface matched with the beveled portion 2421. In actual use, the driving bevel gear 236 is rotated to drive the second driven bevel gear 2354 to rotate, thereby driving the second sliding block 2352 to move through the second screw rod 2351. In addition, the bottom inclined surface of the second connecting plate 2353 cooperates with the beveled portion 2421 of the auxiliary block 242, so that the auxiliary centering joint block 233 moves along the axis of the second screw rod 2351 and moves along the axis of the central shaft 231, thereby realizing the cooperative action of the auxiliary centering joint block 233 and the main centering joint block 232. After the diameter of the joint is adjusted, the cooperative action of the auxiliary centering joint block 233 and the main centering joint block 232 ensures the appropriate contact area between the lens and the joint, that is, ensures the centering effect of the lens. In addition, since the driving of the auxiliary joint centering block and the driving of the main joint centering block are driven by the same driving source, that is, the driving bevel gear 236, the synchronous movement of the two is realized, and the central symmetry distribution of the two joint centering blocks is ensured, that is, the effect of the lens centering is ensured.

[0050] Specifically, the bottom of the first sliding block 2342 and the second sliding block 2352 is provided with a sliding groove 2345, and the mounting groove 241 is provided with a guide block 243 matched with the sliding groove 2345. The axis of the first screw rod 2341 and the second screw rod 2351 intersects with the axis of the central shaft 231, and the length direction of the guide block 243 is consistent with the axis direction of the first screw rod 2341 or the second screw rod 2351. By setting the sliding groove 2345 and the guide block 243 to cooperate and limit the direction of the guide block 243, the moving direction and distance of the main centering joint block 232 and the auxiliary centering joint block 233 are further ensured, thereby ensuring the effect of the lens centering.

[0051] In addition, the arc of the main centering connector block 232 is consistent with that of the auxiliary centering connector block 233, the auxiliary centering connector block 233 is located between two adjacent main centering connector blocks 232, and the main centering connector block 232 and the auxiliary centering connector block 233 are both arranged symmetrically with respect to the center axis of the center axis 231. By adopting the main centering connector block 232 and the auxiliary centering connector block 233 with the same arc, the central symmetric figure surrounded by all the centering connector blocks is more similar to a circle when the two cooperate, so as to ensure that the forces can be counteracted. It can be understood that when the main centering connector block 232 moves outward, the shape surrounded by each centering connector block is no longer a circle, but by reasonably adjusting the number and arc of all the centering connector blocks, the figure surrounded by all the centering connector blocks can be approximately circular, and must be a central symmetric figure, and the points contacted by the connector blocks and the lens form a central symmetric figure, that is, the accuracy of lens centering can be ensured. And the approximately circular shape can improve the stress condition of the lens and avoid the difference in the stress condition inside the lens, which can damage the lens.

[0052] Specifically, the second connecting plate 2353 is provided with limiting blocks 2358 on both sides of the bottom, the side wall of the groove 2356 is provided with a guide groove 2359 matched with the limiting blocks 2358, the guide groove 2359 is provided with an elastic element 237, and the two ends of the elastic element 237 are respectively abutted against the top of the limiting block 2358 and the inner wall of the top of the guide groove 2359. By matching the limiting block 2358 with the guide groove 2359, the shaking of the auxiliary centering connector block 233 is prevented, and the centering effect of the lens is affected. In addition, by arranging the elastic element 237, when the auxiliary centering connector block 233 moves to the preset position, the auxiliary centering connector block 233 is pressed by the elastic element 237, so that the auxiliary centering connector block 233 will not shake under the influence of external force, and the centering effect of the lens is ensured.

[0053] In addition, the center axis 231 is provided with a vacuum suction channel 2311 near one end of the main centering connector block 232, and the other end of the center axis 231 is connected with a vacuum suction device. In addition, in specific implementation, the vacuum suction channel 2311 can also be arranged at the end of the center axis 231, so that when the edge grinding is completed, the center axis 231 also assists in supporting the lens, thereby sharing the external force of the lens, avoiding stress concentration, and causing damage to the surface of the lens. In specific implementation, a soft material can be used at the end of the center axis 231, so as to ensure that the lens will not be abraded.

[0054] Specifically, the translation component 21 includes a translation driving element 211, a telescopic rod 212 arranged on the translation driving element 211, and a transmission rod 213 connected to one end of the telescopic rod 212 and the other end of the rotation component 22;

[0055] The top of the telescopic rod 212 is provided with a sliding groove 2121, and the transmission rod 213 is provided with a limiting circular table 214 which is adapted to the sliding groove 2121 and is located in the sliding groove 2121.

[0056] The rotating part 22 comprises a fixing seat 221 connected with the transmission rod 213, a rotating driving part 222 arranged on the fixing seat 221, and a rotating shaft 223 connected with the rotating driving part 222 and the central shaft 231. A spring 224 is sleeved on the transmission rod 213, and the two ends of the spring 224 are respectively abutted against the bottom of the fixing seat 221 and the top of the telescopic rod 212. In addition, the spring 224 can be a variable pitch spring 224. By arranging the variable pitch spring 224, the adjustment range of the force exerted by the spring 224 is more accurate. Due to the nature of the equal pitch spring 224, when the force exerted by the spring 224 needs to be adjusted, the telescopic rod 212 needs to be displaced by a very small amount, thereby increasing the accuracy requirement of the displacement adjustment of the telescopic rod 212. However, by using the variable pitch spring 224, when the force exerted by the spring 224 needs to be adjusted, the telescopic rod 212 is displaced by a certain amount, so that the spring 224 segment with a relatively smaller elastic variable is compressed, thereby greatly reducing the accuracy requirement of the displacement adjustment of the telescopic rod 212.

[0057] In addition, the edging assembly 30 comprises an axial translation part 3121, a rotating part 32 arranged on the axial translation part 3121, and a polishing part 33 arranged on the rotating part 32. Specifically, after the centering is completed, the polishing part 33 is driven by the axial translation part 3121 to approach or move away from the edge of the lens, and then the polishing part 33 is driven by the rotating part 32 to rotate, thereby polishing the lens.

[0058] In summary, the present application is surrounded by the circular ring joint of the plurality of main centering joint blocks 232 abutting against the lens, and then a certain pressure is applied to the lens by the translation component 21, and then under the action of the rotating component 22, the circular ring joint rotates, when the lens is centered, the contact points of the lens and the circular ring joint are less, and the force balance cannot be achieved, and then the lens moves under the action of the centering force perpendicular to the axis of the center shaft 231 decomposed from the extrusion force, when the lens stops moving and shakes under the rotation of the rotating component 22, the lens is stable at the current position and remains unchanged, which indicates that the lens has completed the centering, at this time, due to the symmetrical structure of the lens itself, the force balance on both sides makes the lens can be stably maintained at the current position. Then the lens is polished by the edging device. When the current size of the circular ring joint and the centering angle corresponding to the lens specification are small, the first driving unit 234 drives the main joint centering block away from the center shaft 231, and then a larger diameter joint is formed by the plurality of main joint centering blocks, thereby effectively improving the centering angle, realizing high-precision mechanical centering of the lens, and the secondary joint centering block also moves away from the center shaft 231 under the action of the second driving unit 235, and moves along the length direction of the center shaft 231, thereby the secondary joint centering block fills the gap between the adjacent main joint centering blocks, and the secondary joint centering block and the main joint centering block jointly form a new centering joint, and the contact area and the gap between the centering joint and the lens are ensured to ensure the stability and accuracy of the centering edging, and the application range of the centering edging device is increased, and the mechanical centering method itself has high centering efficiency. Therefore, the present application solves the problem of lacking a centering precision and efficiency high and applicable range optical lens centering edging device in the prior art.

[0059] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. An optical lens centering and edging device, characterized in that, The centering assembly comprises a translation component, a rotating component arranged on the translation component, and a centering component arranged on the rotating component, the centering component comprises a central shaft, a plurality of main centering joint blocks and a plurality of auxiliary centering joint blocks arranged circumferentially around the central shaft, a first driving unit connected with the main centering joint blocks, and a second driving unit connected with the auxiliary centering joint blocks. The main centering joint blocks and the auxiliary centering joint blocks are arc-shaped, the main centering joint blocks are arranged to form a ring-shaped joint coaxially arranged on the central shaft, the auxiliary centering joint blocks are arranged below the main centering joint blocks, the first driving unit is used to drive the main centering joint blocks to move close to or away from the central shaft, and the second driving unit is used to drive the auxiliary centering joint blocks to move close to or away from the central shaft while moving close to or away from the main centering joint blocks. The first driving unit comprises a first screw, a first sliding block sleeved on the first screw, and a first connecting plate having one end connected with the first sliding block and the other end connected with the middle part of the main centering joint blocks, one end of the central shaft is connected with the rotating component, the central shaft is provided with a driving bevel gear on the side close to the rotating component, and the first screw is provided with a first driven bevel gear matched with the driving bevel gear on the side close to the central shaft.

2. The optical lens centering edging device according to claim 1, characterized in that, The centering assembly further comprises a fixed circular table, the fixed circular table is provided with a mounting groove, the first driving unit and the second driving unit are arranged in the mounting groove, one end of the central shaft penetrates through the fixed circular table and is connected with the rotating component, the driving bevel gear is arranged at the bottom of the mounting groove, and one end of the first screw is rotationally connected with the side wall of the mounting groove.

3. The optical lens centering edging device according to claim 2, characterized in that, The second driving unit comprises a second screw, a second sliding block sleeved on the second screw, and a second connecting plate, one end of the second connecting plate is connected with the middle part of the auxiliary centering joint blocks, and the other end is arranged on the second sliding block.

4. The optical lens centering edging device according to claim 3, characterized in that, The second screw is provided with a second driven bevel gear matched with the driving bevel gear on the side close to the central shaft, the other end is rotationally connected with the side wall of the mounting groove, the top of the second sliding block outwardly extends a connecting part, the top of the connecting part is provided with a groove matched with the second connecting plate, the side of the connecting part facing the central shaft is provided with an avoiding groove penetrating through the connecting part, the side wall of the mounting groove extends an auxiliary block toward the central shaft, and the side of the auxiliary block away from the side wall of the mounting groove is provided with a slope part. The slope part is at least partially located at the bottom of the avoiding groove, the end of the second connecting plate away from the auxiliary centering joint blocks is arranged in the groove and located on the slope part, and is provided with an inclined surface matched with the slope part. ​ 5. The optical lens centering edging device according to claim 4, characterized in that, The first slider and the second slider bottom are respectively provided with a sliding groove, the mounting groove is provided with a guide block matched with the sliding groove, the axis of the first screw and the second screw intersects with the axis of the center shaft, and the length direction of the guide block is consistent with the axis direction of the first screw or the second screw.

6. The optical lens centering edging device according to claim 1, characterized in that, The main centering joint block and the arc of the auxiliary centering joint block are consistent, the auxiliary centering joint block is located between two adjacent main centering joint blocks, and the main centering joint block and the auxiliary centering joint block are symmetrically arranged with respect to the axis center of the center shaft.

7. The optical lens centering edging device according to claim 4, characterized in that, The second connecting plate bottom is provided with a limiting block on both sides, the recess sidewall is provided with a guide groove matched with the limiting block, the guide groove is provided with an elastic element, and the two ends of the elastic element are respectively abutted against the top of the limiting block and the top inner wall of the guide groove.

8. The optical lens centering edging device according to claim 1 characterized in that, The center shaft is provided with a vacuum adsorption hole near one end of the main centering joint block, and the other end of the center shaft is connected with a vacuum adsorption device.

9. The optical lens centering edging device according to claim 8, characterized in that, The translation component includes a translation driving element, a telescopic rod arranged on the translation driving element, and a transmission rod, one end of the transmission rod is connected with the telescopic rod, and the other end is connected with the rotation component; The telescopic rod top is provided with a sliding groove, and the transmission rod is provided with a limiting circular table matched with the sliding groove near one side of the telescopic rod, and the limiting circular table is arranged in the sliding groove; The rotation component includes a fixed seat connected with the transmission rod, a rotation driving element arranged on the fixed seat, and a rotating shaft connected with the rotation driving element, the rotating shaft is connected with the center shaft, a spring is sleeved on the transmission rod, and the two ends of the spring are respectively abutted against the bottom of the fixed seat and the top of the telescopic rod.

10. The optical lens centering edging device according to claim 1 characterized in that, The edging assembly includes an axial translation component, a rotating component arranged on the axial translation component, and a polishing element arranged on the rotating component.

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