Lens edging jig and lens polishing apparatus

Abstract

This utility model relates to the field of lens polishing technology, specifically providing a lens edging fixture and lens polishing equipment. The lens edging fixture includes: an edging whetstone and a limiting block. The edging whetstone is used to polish the edge structure of the lens, and the limiting block is used to abut the convex surface of the lens. The edging whetstone has a disc-shaped structure, with a first protrusion and a second protrusion provided on its radially outer surface, spaced apart, forming an annular groove between them. An inner groove is provided on the surface of the second protrusion facing the first protrusion, and this inner groove communicates with the annular groove. The limiting block is positioned close to the annular groove and includes an abutting surface near the annular groove and a limiting groove formed on the abutting surface. The abutting surface abuts the convex surface of the lens, and the limiting groove accommodates a portion of the convex surface of the lens. The inner groove prevents whitening and cracking of the lens edge, and the limiting groove avoids scratches on the optically effective area of ​​the lens's convex surface.

Description

Technical Field

[0001] This utility model relates to the field of lens polishing technology, and in particular to a lens edging fixture and lens polishing equipment. Background Technology

[0002] Currently, with the rapid development of the automotive industry, the quality requirements for automotive lenses are becoming increasingly stringent. As the core optical component of automotive lenses, lens quality control is becoming increasingly rigorous.

[0003] In lens manufacturing, the edges of lenses need to be polished to ensure their precision and quality. However, existing lens edging fixtures, due to their large contact area with the lens and the fact that some of them come into contact with the convex surface of the lens (especially the optically effective area on the convex surface), wear down the lens during the polishing process, causing the lens edges to turn white or crack. In some cases, scratches may even be left on the optically effective area of ​​the lens's convex surface, seriously affecting the quality of the lens. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a lens edging fixture that can prevent whitening of the lens edge, cracking of the lens edge, and scratches on the optically effective area of ​​the lens's convex surface during lens processing.

[0005] This utility model provides a lens edging fixture, including an edging whetstone and a limiting block. The edging whetstone is used to grind the edge structure of the lens, and the limiting block is used to abut against the convex surface of the lens. The edging whetstone has a disc-shaped structure, and a first boss and a second boss are provided on the radially outer surface of the edging whetstone, with the first boss and the second boss spaced apart and forming an annular groove between the first boss and the second boss. An inner groove is provided on the surface of the second boss facing the first boss, and the inner groove communicates with the annular groove. The limiting block is located close to the annular groove, and the limiting block includes an abutting surface close to the annular groove and a limiting groove formed on the abutting surface. The abutting surface is used to abut against the convex surface of the lens, and the limiting groove is used to accommodate a portion of the convex surface of the lens.

[0006] Furthermore, the limiting groove of the limiting block is provided with a stepped portion.

[0007] Furthermore, along the radial direction of the grinding stone, the length of the second boss is greater than the length of the first boss.

[0008] Furthermore, the first boss has an inclined surface facing the annular groove.

[0009] Furthermore, along the axial direction of the grinding stone, a mounting hole is provided in the middle of the grinding stone.

[0010] Furthermore, the grinding stone is also provided with a first groove, and the first groove is located outside the mounting hole.

[0011] Furthermore, the lens edging fixture also includes an abutment block, which is disposed opposite to the limiting groove of the limiting block.

[0012] On the other hand, this utility model also provides a lens polishing device, including a machine base, a rotating shaft and the above-mentioned lens edging fixture, wherein the rotating shaft and the limiting block are installed on the machine base, and the edging fixture is fixedly connected to the rotating shaft and close to the limiting block.

[0013] Compared with the prior art, the technical solution of this application has the following advantages:

[0014] (1) An inner groove is provided on the second protrusion to reduce the contact area between the lens being ground in the annular groove and the second protrusion, thereby ensuring that the edge of the lens will not turn white or crack.

[0015] (2) A limiting groove is provided on the abutting surface of the limiting block that abuts the convex surface of the lens, and the optical effective area on the convex surface of the lens is set in the limiting groove to protect the optical effective area on the convex surface of the lens from scratches; and further, a step is provided in the limiting groove to avoid the convex surface of the lens, so as to further ensure that the optical effective area on the convex surface of the lens is not affected.

[0016] (3) An inclined surface is provided at the contact surface between the first boss and the annular groove to further avoid the edge surface of the lens and prevent the edge from turning white and cracking. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 A schematic diagram of the lens edging fixture provided by this utility model;

[0019] Figure 2 A schematic diagram of the grinding stone provided by this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of point C in the image;

[0021] Figure 4 A schematic diagram of the limiting block provided by this utility model. Detailed Implementation

[0022] To better understand this invention, various aspects of the invention will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of embodiments of the invention and are not intended to limit the scope of the invention in any way. Throughout the specification, the same reference numerals denote the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0024] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of the present invention, the word "may" is used to indicate "one or more embodiments of the present invention." And the term "exemplary" is intended to refer to an example or illustration.

[0025] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0026] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] To facilitate understanding of this solution, Figure 1A schematic diagram of the lens edging fixture protected by this utility model is provided, and a lens 4 is disposed between the edging whetstone 1 and the limiting block 2. Furthermore, for better understanding of this application, the axial direction of the edging whetstone 1 is defined as the left-right direction, that is, the rotation axis direction of the edging whetstone 1; the radial direction of the edging whetstone 1 is defined as the up-down direction, that is, the diameter direction of the edging whetstone 1. Figure 1 The lens 4 shown in the figure includes a convex surface (not shown in the figure) in the axial direction. The convex surface is close to the limiting block 2. The edge of the lens 4 refers to the end of the lens in the radial direction, that is, the edge structure of the lens 4 that needs to be polished.

[0028] like Figure 1 As shown, this utility model provides a lens edging fixture, including an edging whetstone 1, a limiting block 2, and an abutment block 3. The limiting block 2 and the abutment block 3 are arranged opposite each other to clamp a lens 4 along the axial direction (left-right direction). The edging whetstone 1 is located on the side of the limiting block 2 and the abutment block 3, facing the edge structure of the lens 4. The edging whetstone 1 is used to grind the edge structure of the lens 4, the limiting block 2 is used to abut the convex surface of the lens 4, and the abutment block 3 is used to abut the surface of the lens 4 away from the convex surface. The limiting block 2 cooperates to limit and clamp the lens 4, thereby performing edging processing on the lens 4. Optionally, the lens edging fixture also includes a mounting frame (not shown in the figure), on which a rotatable mounting post is provided. The limiting block 2 and the abutment block 3 are both mounted on the mounting frame, and the edging whetstone 1 is mounted on the mounting post on the side of the limiting block 2 and the abutment block 3. It should be noted that the relative arrangement of the limiting block 2 and the abutting block 3 means that the limiting block 2 and the abutting block 3 are close to each other and there is a gap. Specifically, the limiting block 2 and the abutting block 3 are arranged close to each other along the axial direction.

[0029] Specifically, such as Figures 1-4 As shown, the grinding stone 1 has a disc-shaped structure. A first protrusion 11 and a second protrusion 12 are provided on the radially outer surface of the grinding stone 1, and the first protrusion 11 and the second protrusion 12 are spaced apart. An annular groove 13 is formed between the first protrusion 11 and the second protrusion 12. The annular groove 13, in conjunction with the first protrusion 11 and the second protrusion 12, is used to grind the edge of the lens 4. Specifically, by setting the edge structure of the lens 4 within the annular groove 13, the edge of the lens 4 is ground by driving the grinding stone 1 to rotate. It should be noted that the radially outer surface of the grinding stone 1 refers to the outermost outer wall surface along the radial direction of the grinding stone 1; that is, the first protrusion 11 and the second protrusion 12 are located on the outermost side of the grinding stone 1.

[0030] Furthermore, the surface of the second boss 12 facing the first boss 11 is provided with an inner groove 121, and the inner groove 121 is in communication with the annular groove 13. The inner groove 121 on the second boss 12 reduces the contact area between the lens 4, which is polished in the annular groove 13, and the second boss 12, thereby ensuring that the edge of the lens 4 will not turn white or crack.

[0031] The limiting block 2 is positioned near the annular groove 13, and includes an abutment surface 21 near the annular groove 13 and a limiting groove 22 formed on the abutment surface 21. The abutment surface 21 abuts against the convex surface of the lens 4, specifically against the non-optically effective area on the convex surface of the lens 4. The limiting groove 22 accommodates a portion of the convex surface of the lens 4, that is, it accommodates the optically effective area of ​​the lens 4. It should be noted that the central position on the convex surface of the lens 4 is designated as the optically effective area, which is the area through which light can pass. Since this area needs to maintain surface integrity, it is necessary to prevent wear on the central area of ​​the convex surface of the lens 4 during the manufacturing process. The limiting groove 22 is provided on the abutment surface 21 of the limiting block 2, and the optically effective area on the convex surface of the lens 4 is placed within the limiting groove 22, thereby protecting the optically effective area on the convex surface of the lens 4 from scratches.

[0032] In one embodiment, such as Figure 4 As shown, a step portion 221 is provided in the limiting groove 22 of the limiting block 2. Considering that the convex surface of the lens 4 needs to be abutted and limited by the abutting surface 21, and the middle part of the convex surface is the optically effective area, in order to ensure that the abutting surface 21 does not affect the middle part of the convex surface, the step portion 221 is designed to avoid it, and further ensure that the optically effective area on the convex surface of the lens 4 will not be scratched.

[0033] In one embodiment, such as Figure 1 and Figure 3 As shown, along the radial (vertical) direction of the grinding stone 1, the length of the second boss 12 is greater than the length of the first boss 11, that is, the second boss 12 protrudes beyond the first boss 11. Considering that the lens 4 will generate debris during the grinding process, the longer second boss 12 can collect the debris and prevent it from affecting the processing of the lens 4; at the same time, the longer design of the second boss 12 facilitates the better design of the inner groove 121.

[0034] In one embodiment, the first boss 11 is provided with a slope 111 facing the annular groove 13, that is, the surface of the first boss 11 used to define the annular groove 13 is provided with a slope 111. The slope 111 is provided at the contact surface between the first boss 11 and the annular groove 13 to further avoid the edge structure of the lens 4 and prevent the edge structure of the lens 4 from whitening and cracking.

[0035] In one embodiment, such as Figure 2 As shown, along the axial direction of the grinding stone 1, a mounting hole 14 is provided in the middle of the grinding stone 1, which facilitates the installation and fixing of the grinding stone 1.

[0036] In one embodiment, the grinding stone 1 is further provided with a first groove 15, and the first groove 15 is located outside the mounting hole 14. The first groove 15 can reduce the amount of material used, thereby reducing the cost of the grinding stone 1.

[0037] In one embodiment, combined with Figure 1 and Figure 4 As can be seen, the abutment block 3 and the limiting groove 22 of the limiting block 2 are positioned opposite each other. The abutment block 3 is oriented towards and close to the limiting groove 22, which facilitates the fixing of the lens 4 with the limiting block 2. The abutment block 3, together with the limiting block 2, limits and fixes the lens 4 in the optical axis direction of the lens 4, preventing displacement of the lens 4 due to uneven force during processing, thereby avoiding affecting the processing accuracy of the lens 4.

[0038] On the other hand, this utility model also provides a lens polishing device, including a machine base, a rotating shaft and the above-mentioned lens edge polishing fixture. The rotating shaft and the limiting block 2 are installed on the machine base, and the rotating shaft can rotate relative to the machine base. The edge polishing stone 1 is fixedly connected to the rotating shaft and close to the limiting block 2. The edge polishing stone 1 rotates through the rotating shaft, thereby polishing the edge structure of the lens 4.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A lens edging fixture, comprising an edging whetstone and a limiting block, wherein the edging whetstone is used to grind the edge structure of a lens, and the limiting block is used to abut against the convex surface of the lens, characterized in that: The grinding stone has a disc-shaped structure. A first protrusion and a second protrusion are provided on the radial outer surface of the grinding stone, and the first protrusion and the second protrusion are spaced apart. An annular groove is formed between the first protrusion and the second protrusion. An inner groove is provided on the surface of the second protrusion facing the first protrusion, and the inner groove is in communication with the annular groove. The limiting block is disposed near the annular groove. The limiting block includes an abutting surface near the annular groove and a limiting groove formed on the abutting surface. The abutting surface is used to abut the convex surface of the lens, and the limiting groove is used to accommodate a portion of the convex surface of the lens.

2. The lens edging fixture according to claim 1, characterized in that, The limiting block has a stepped portion in the limiting groove.

3. The lens edging fixture according to claim 1, characterized in that, Along the radial direction of the grinding stone, the length of the second boss is greater than the length of the first boss.

4. The lens edging fixture according to claim 1, characterized in that, The first boss has an inclined surface facing the annular groove.

5. The lens edging fixture according to claim 1, characterized in that, Along the axial direction of the grinding stone, a mounting hole is provided in the middle of the grinding stone.

6. The lens edging fixture according to claim 5, characterized in that, The grinding stone is also provided with a first groove, and the first groove is located outside the mounting hole.

7. The lens edging fixture according to claim 1, characterized in that, The lens edging fixture also includes an abutment block, which is disposed opposite to the limiting groove of the limiting block.

8. A lens polishing device, characterized in that, The device includes a machine base, a rotating shaft, and a lens edging fixture as described in any one of claims 1-7, wherein the rotating shaft and the limiting block are mounted on the machine base, and the edging whetstone is fixedly connected to the rotating shaft and close to the limiting block.

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