Lens holding mechanism

Abstract

The present application provides a kind of lens clamping mechanism, it is related to lens manufacturing technical field, the lens clamping mechanism includes: gripper cylinder body and two grippers, each gripper is respectively symmetrically provided with gripper unit, the gripper unit includes: fixed on gripper gripper finger support, at least two gripper fingers are arranged on the gripper finger support along the clamping direction, the clamping surface of the gripper finger is provided with step structure, and the clamping surface is used to clamp the side surface of lens.The present application is clamped when lens, by gripper cylinder, two gripper units are pushed along the clamping direction and close, and the lens of any edge thickness is clamped on the step structure of symmetric position gripper finger, so that the lens of any edge thickness can be easily clamped, improve clamping efficiency, avoid lens breakage.

Description

Technical Field

[0001] This invention relates to the field of lens manufacturing technology, and in particular to a lens clamping mechanism. Background Technology

[0002] In lens processing, clamping devices are generally used to hold the lenses, and then grinding, polishing and other processing are carried out on these devices.

[0003] Currently, the main method for holding lenses is to use clamping devices that match the shape of the lenses. The thickness of these clamping devices is fixed, which makes it easy to hold nearsighted lenses that are thicker at the edges and thinner in the middle. However, for farsighted lenses (also known as reading glasses) that are thinner at the edges and thicker in the middle, the thickness of the lens edges is much smaller than the thickness of the clamping device, making it difficult for the clamping device to hold the lens, and even causing damage to the lens. Summary of the Invention

[0004] The present invention aims to provide a lens clamping mechanism in order to at least partially solve at least one of the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention provides a lens clamping mechanism, including: a clamping cylinder body and two clamping jaws, each clamping jaw having a clamping unit symmetrically arranged on it, the clamping unit including: a clamping finger support fixed on the clamping jaw, at least two clamping fingers arranged on the clamping finger support along the clamping direction, the clamping surface of the clamping fingers having a stepped structure, the clamping surface referring to the side for clamping the lens.

[0006] According to a preferred embodiment of the present invention, the gripper finger includes a plurality of gripping surfaces with stepped structures, and the gripper finger is detachably fixed to the gripper finger support.

[0007] According to a preferred embodiment of the present invention, the gripper finger has a first step structure on one side along the gripping direction and a second step structure on the other side. The size / shape of the lens gripped by the first step structure is different from the size / shape of the lens gripped by the second step structure.

[0008] According to a preferred embodiment of the present invention, the gripper finger support includes: a first vertical segment, a horizontal segment and a second vertical segment connected in sequence, wherein the second vertical segment has at least two first grooves on its side parallel to the gripping direction, and a gripper finger is fixed in each first groove.

[0009] According to a preferred embodiment of the present invention, the clamping direction is horizontal, the side of the gripper fingers in the horizontal direction is provided with a second groove that matches the first groove, and the side of the gripper fingers in the vertical direction is formed by a stepped structure of a first vertical surface, a horizontal surface and a second vertical surface connected in sequence.

[0010] According to a preferred embodiment of the present invention, at least one gripper unit is provided with a lens sensing element.

[0011] According to a preferred embodiment of the present invention, the lens sensing element includes: a mounting base disposed on the side of the gripper finger support segment away from the lens, the mounting base being hollow and having an opening on one side, a switch being disposed on the side of the mounting base with the opening and covering the opening, an elastic element being disposed in the hollow space of the mounting base, the elastic element being in contact with one end of the sensing element in a free state, and the other end of the sensing element passing through the gripper finger support segment and extending to the edge of the lens in a gripping state; wherein: the gripper finger support segment refers to the gripper finger support located between two gripper fingers.

[0012] According to a preferred embodiment of the present invention, the gripper finger support includes: a first vertical segment, a horizontal segment and a second vertical segment connected in sequence. The second vertical segment has at least two first grooves on its side parallel to the gripping direction, and a gripper finger is fixed in each first groove. The second vertical segment forms a gripper finger support segment between two adjacent first grooves. The gripper finger support segment has a first through hole along the gripping direction, and a sensing element passes through the first through hole.

[0013] According to a preferred embodiment of the present invention, the mounting base includes a horizontal end fixed to the gripper finger support segment and a vertical end perpendicular to the horizontal end, the cross-section of the vertical end being a concave shape including an opening; the sensing element includes: a sensing magnet and a hollow cylindrical sensor.

[0014] The switch is fixedly installed at the opening to form a hollow space in the vertical end. The elastic element is in contact with one end of the sensor in the free state, and the other end of the sensor is in contact with one end of the sensing magnet. The other end of the sensing magnet passes through the second through hole and the first through hole in the horizontal end in sequence.

[0015] According to a preferred embodiment of the present invention, the lens sensing element is a pressure sensor disposed on a stepped structure of at least one gripper finger.

[0016] In summary, the lens clamping mechanism of the present invention symmetrically arranges clamping units on the two clamping jaws of the clamping cylinder. Each clamping unit has at least two clamping fingers along the clamping direction, and the clamping fingers have a stepped structure on the side of the lens for clamping. When clamping the lens, the clamping cylinder pushes the two clamping units to close along the clamping direction, and clamps the lens of any edge thickness onto the stepped structure of the symmetrically positioned clamping fingers. This allows for easy clamping of lenses of any edge thickness, improving clamping efficiency and preventing lens breakage. Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] 1. A stepped structure is provided on the side of the gripper fingers used to hold the lens. The stepped structure can hold lenses of any edge thickness, meeting the gripping requirements of thinner lenses (such as farsighted glasses).

[0018] 2. Multiple clamping surfaces with stepped structures are provided on the gripper fingers, and the gripper fingers can be detachably fixed to the gripper finger bracket to meet the clamping requirements of lenses of different shapes or sizes.

[0019] 3. A lens sensing element is provided on at least one gripper unit. The lens sensing element senses the clamping state of the lens and generates a corresponding clamping signal to realize the automated control of lens clamping. Attached Figure Description

[0020] Figure 1 This is a perspective view of a lens clamping mechanism provided in an embodiment of the present invention;

[0021] Figure 2 This is a front view of a lens clamping mechanism provided in an embodiment of the present invention;

[0022] Figure 3 It is along Figure 2 Cross-sectional view of line AA in the middle;

[0023] Figure 4 This is an exploded view of a lens clamping mechanism provided in an embodiment of the present invention.

[0024] Wherein: 1-gripper cylinder body, 2-gripper, 31-gripper finger support, 311-first vertical section, 312-horizontal section, 313-second vertical section, 314-first groove, 32-gripper finger, 321-second groove, 33-step structure, 41-mounting base, 42-switch, 43-elastic element, 44-sensing element. Detailed Implementation

[0025] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the invention.

[0026] 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..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0027] Please see Figures 1-4 This invention provides a lens clamping mechanism, comprising: a clamping cylinder body 1 and two clamping jaws 2 disposed on the clamping cylinder body 1 and capable of opening and closing movements. Each clamping jaw 2 is symmetrically provided with clamping jaw units. Each clamping jaw unit includes: a clamping jaw finger support 31 fixed to the clamping jaw 2, and at least two clamping jaw fingers 32 disposed on the clamping jaw finger support 31 along the clamping direction. The clamping surface of each clamping jaw finger 32 is provided with a stepped structure 33, the clamping surface referring to the side of the clamping jaw finger 32 used for clamping the lens. For example, the stepped structure 33 can be formed by a first surface, a second surface, and a third surface connected in sequence, wherein: the first and third surfaces are perpendicular to the clamping direction, and the second surface is parallel to the clamping direction. When clamping a lens, the clamping jaws 2 are pushed by the clamping cylinder 1, thereby causing the two clamping jaw units symmetrically fixed to the clamping jaws 2 to close along the clamping direction, and clamping a lens of any edge thickness between the first and second surfaces of the stepped structure 33 at symmetrical positions. This allows for easy clamping of lenses of any edge thickness, improving clamping efficiency and preventing lens breakage. Optionally, the gripper finger support 31 can be made of alloy materials such as aluminum alloy; the stepped structure 33 or the entire gripper finger 32 can be made of a material with elasticity between plastic and rubber, such as polyurethane, so as to clamp the lens without damaging it.

[0028] Wherein: the clamping direction is consistent with the direction of the opening and closing movement of the gripper 2. Figures 1-2 Taking the horizontal direction as an example, the gripper 2 opens and closes horizontally, and the gripper finger support 31 is vertically fixed to the gripper 2. (See below) Figure 4The gripper finger support 31 includes: a first vertical section 311, a horizontal section 312, and a second vertical section 313 connected in sequence. The first vertical section 311 can be provided with through holes corresponding to those on the gripper 2. Screws pass through the through holes to fix the first vertical section 311 to the gripper 2. The length of the horizontal section is set according to the lens size. The second vertical section 313 has two first grooves 314 on its side parallel to the gripping direction (horizontal direction), and each first groove 314 fixes a gripper finger 32. Taking the gripper finger 32 as a straight strip as an example, the side of the gripper finger 32 in the horizontal direction has a second groove 321 that matches the first groove 314. At the same time, through holes are provided on the first groove 314 and the second groove 321 respectively. During installation, the first groove 314 is placed in the second groove 321, and screws pass through the through holes to fix the two. The vertical side of the gripper finger 32 (i.e. the side used to grip the lens) is formed by a stepped structure 33 by a first surface, a second surface and a third surface connected in sequence. The shape of the first surface can be a curved surface that matches the edge of the lens or a plane that is tangent to the edge of the lens. The second surface is a plane. The shape of the third plane can be the same as or different from the first plane. This invention does not make specific limitations.

[0029] Furthermore, the gripper fingers 32 are provided with multiple gripping surfaces having stepped structures 33. Simultaneously, the gripper fingers 32 are detachably fixed to the gripper finger support 31. This allows for the use of different gripping surfaces to hold lenses of different shapes or sizes, meeting the gripping needs of lenses of various sizes. Figure 4 Taking the straight bar-shaped gripper finger 32 as an example, a first step structure can be provided on one side of the gripper finger 32 along the horizontal direction, and a second step structure can be provided on the other side. The lens size held by the first step structure is different from the lens size held by the second step structure, or the shape of the lens held by the first step structure is different from the shape of the lens held by the second step structure. Therefore, the surface parameters of the first surface of the first step structure and the first surface of the second step structure can be designed differently. For example, if the first surface is curved, the curvature can be set differently; if the first surface is flat, the tilt angle can be set differently. In practical use, the target gripping surface of the corresponding step structure 33 is selected according to the shape or size of the lens, and the target gripping surface is installed close to the lens side. Alternatively, since the two gripper units are symmetrical, the gripper fingers 32 within the two gripper units are also symmetrical. When gripping lenses of different sizes or shapes, the gripper fingers 32 in symmetrical positions can be interchanged and fixed.

[0030] Furthermore, a lens sensing element can be set on at least one gripper unit. The lens sensing element senses the clamping state of the lens and generates a corresponding clamping signal to realize automated control of lens clamping and meet the needs of batch operation.

[0031] In one example, such as Figures 1-4 The lens sensing element includes: a mounting base 41 disposed on the side of the gripper finger support segment away from the lens; the mounting base 41 is hollow and has an opening on one side; a switch 42 is disposed on the side of the mounting base 41 with the opening and covers the opening; an elastic element 43 is disposed in the hollow space of the mounting base 41; the elastic element 43 contacts one end of the sensing element 44 in the free state; the other end of the sensing element 44 passes through the gripper finger support segment and extends to the edge of the lens in the gripping state. Specifically, the gripper finger support segment refers to the gripper finger support 31 located between two gripper fingers 32. Specifically, the second vertical segment 313 of the gripper finger support 31 forms a gripper finger support segment between two adjacent first grooves 314. The gripper finger support segment has a first through hole in the horizontal direction, and the sensing element 44 passes through the first through hole and extends to the edge of the lens in the gripping state. Thus, when the gripper unit closes along the clamping direction to tighten the lens, the lens pushes the sensing element 44 to compress the elastic element 43. When the sensing element 44 moves to the opening, the magnetic flux generated by the sensing element 44 is sensed by the switch 42 through the opening, and the switch 42 generates a tightening state signal. When the gripper unit opens along the clamping direction to loosen the lens, the elastic element 43 extends and pushes the sensing element 44 back to its original position. After resetting, the sensing element 44 moves away from the switch 42, and the switch 42 can no longer sense the magnetic flux generated by the sensing element 44, thereby generating a loosening state signal. In this embodiment, the elastic element 43 can generate elastic force, specifically a compression spring, etc. The sensing element 44 can generate magnetic flux, specifically a sensing magnet, etc.

[0032] Optional, such as Figure 4 The mounting base 41 includes a horizontal end fixed to the gripper finger support section and a vertical end perpendicular to the horizontal end. Preferably, the horizontal end and the vertical end form a T-shaped body. The horizontal end has a second through hole, and mounting holes are provided at corresponding positions on the horizontal end and the gripper finger support section, through which the two can be fixed. The cross-section of the vertical end is concave with an opening. The sensing element 44 includes a sensing magnet and a hollow cylindrical sensing body. The switch 42 is fixedly installed at the opening to form a hollow space inside the vertical end. An elastic element 43 is disposed in the hollow space. In the free state, the elastic element 43 is in contact with one end of the sensing body of the sensing element 44. The other end of the sensing body is connected to one end of the sensing magnet. The other end of the sensing magnet passes through the second through hole of the horizontal end and the first through hole of the gripper finger support section and extends to the edge of the lens in the clamping state.

[0033] In another example, the lens sensing element is a pressure sensor disposed on the stepped structure 33 of at least one gripper finger 32. Thus, when the gripper unit closes in the gripping direction to tighten the lens, the lens applies pressure to the pressure sensor on the stepped structure 33, thereby generating a tightened state signal; when the gripper unit opens in the gripping direction to loosen the lens, the pressure on the pressure sensor becomes zero, thereby generating a relaxed state signal.

[0034] In summary, the lens clamping mechanism of the present invention symmetrically arranges clamping units on the two clamping jaws 2 of the clamping cylinder 1. Each clamping unit includes a clamping finger support 31 fixed to the clamping jaw 2, at least two clamping fingers 32 disposed on the clamping finger support 31 along the clamping direction, and a stepped structure 33 provided on the clamping surface of the clamping fingers 32. When clamping a lens, the clamping cylinder 1 pushes the two clamping units to close along the clamping direction, and clamps a lens of any edge thickness onto the stepped structure 33 of the symmetrically positioned clamping fingers 32. This allows for easy clamping of lenses of any edge thickness, improves clamping efficiency, and prevents lens breakage. Compared with the prior art, the present invention has at least the following beneficial effects:

[0035] 1. A stepped structure 33 is provided on the side of the gripper fingers 32 for holding the lens. The stepped structure 33 can hold the lens of any edge thickness, so as to meet the gripping requirements of thinner lenses (such as farsighted glasses).

[0036] 2. Multiple clamping surfaces with stepped structures 32 are provided on the gripper fingers 32, and the gripper fingers 32 can be detachably fixed to the gripper finger bracket 31 to meet the clamping requirements of lenses of different shapes or sizes.

[0037] 3. A lens sensing element is provided on at least one gripper unit. The lens sensing element senses the clamping state of the lens and generates a corresponding clamping signal to realize the automated control of lens clamping.

[0038] It should be clarified that the present invention is not limited to the specific structures and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known structures are omitted here. In the above embodiments, several specific structures are described and shown as examples. However, the lens cleaning mechanism of the present invention is not limited to the specific structures described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the installation positions between structures, after understanding the spirit of the present invention.

[0039] The above description is merely a specific embodiment of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the structures, modules, and units described above can be referred to the corresponding processes in the foregoing embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

Claims

1. A lens clamping mechanism, characterized in that, include: The gripper cylinder body and two grippers are provided. Each gripper is symmetrically provided with a gripper unit. The gripper unit includes: a gripper finger support fixed on the gripper; at least two strip-shaped gripper fingers detachably fixed on the gripper finger support along the gripping direction; the sides of the gripper fingers at both ends, i.e. the gripping surfaces, are provided with stepped structures; the gripping surfaces refer to the sides used for gripping the lens; at least one gripper unit is provided with a lens sensing element. The stepped structure is formed by a first surface, a second surface, and a third surface connected in sequence, wherein: the first surface and the third surface are perpendicular to the clamping direction, and the second surface is parallel to the clamping direction; when clamping the lens, the clamping jaws are pushed by the clamping jaw cylinder body, and then the two clamping jaw units symmetrically fixed on the clamping jaws close along the clamping direction, and the lens of arbitrary edge thickness is clamped between the first surface and the second surface of the stepped structure at the symmetrical position of the two clamping jaw units; The lens sensing element includes: a mounting base disposed on the side of the gripper finger support segment away from the lens; the mounting base includes a horizontal end fixed to the gripper finger support segment and a vertical end perpendicular to the horizontal end; the horizontal end and the vertical end form a T-shaped body; the cross-section of the vertical end is concave, including an opening; a switch is fixedly installed at the opening, forming a hollow space inside the vertical end; an elastic element is disposed in the hollow space; the elastic element is in contact with one end of the sensing element in a free state; the other end of the sensing element passes through the gripper finger support segment and extends to the edge of the lens in the gripping state; when the magnetic flux generated by the sensing element is sensed by the switch through the opening, the switch generates a clamping state signal; wherein: the gripper finger support segment refers to the gripper finger support located between two gripper fingers. The gripper finger support includes: a first vertical segment, a horizontal segment, and a second vertical segment connected sequentially along the gripping direction. The second vertical segment has at least two first grooves on its side parallel to the gripping direction, and a gripper finger is fixed in each first groove. The second vertical segment forms a gripper finger support segment between two adjacent first grooves. The gripper finger support segment has a first through hole along the gripping direction, and a sensing element passes through the first through hole.

2. The lens clamping mechanism according to claim 1, characterized in that, The gripper fingers have a first step structure on one side along the gripping direction and a second step structure on the other side. The size / shape of the lens gripped by the first step structure is different from the size / shape of the lens gripped by the second step structure.

3. The lens clamping mechanism according to claim 1, characterized in that, The clamping direction is horizontal. The side of the gripper finger in the horizontal direction is provided with a second groove that matches the first groove. The side of the gripper finger in the vertical direction is formed by a stepped structure consisting of a first vertical surface, a horizontal surface and a second vertical surface connected in sequence.

4. The lens clamping mechanism according to claim 1, characterized in that, The sensing element includes: a sensing magnet and a hollow cylindrical sensing body; The elastic element is in contact with one end of the sensor in a free state, and the other end of the sensor is in contact with one end of the sensing magnet. The other end of the sensing magnet passes through the second through hole and the first through hole at the horizontal end in sequence.

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