CN218749323U - Lens positioning jig - Google Patents

Abstract

The utility model relates to a VR lens processing technology field discloses a lens positioning jig. The lens positioning jig comprises a jig body, a support piece and a limiting block. Be formed with the storage tank on the tool body, the vacuum gas pocket has been seted up to the storage tank bottom, can adsorb the lens after the vacuum gas pocket leads to the negative pressure, the lens drops when preventing the tool upset, the up end of tool body is formed with the first face that leans on along storage tank circumference, the first edge that leans on the face to be used for supporting the lens, the protruding center department of locating the storage tank of support piece, support piece's up end is curved second and bears the face of leaning on, the second bears the face of leaning on and is used for supporting the center department of lens, and then can increase the area of contact with the lens, prevent that the outline curved surface of lens from appearing the phenomenons, the yields has been improved. A plurality of stopper positions set up on the tool body and set up along the circumference interval of lens adjustably, can be applicable to not unidimensional lens, and a plurality of stoppers can press from both sides the lateral wall of lens tightly to it is fixed with the lens.

Description

Lens positioning jig

Technical Field

The utility model relates to a VR lens processing technology field, concretely relates to lens positioning jig.

Background

Along with the rising and popularization of VR technique, the demand of products such as VR glasses is bigger and bigger, and the lens surface of VR glasses needs to carry out the pad pasting usually and handles, and the quality of pasting of diaphragm will exert an influence to the optical effect of lens, finally influences the formation of image effect of VR glasses. The lens outline of VR glasses is the arc, and it is divided into functional area and non-functional area, and non-functional area is the marginal position of lens along circumference, and remaining intermediate portion is the functional area.

In order to ensure the film-sticking quality, when the lens is stuck, a jig is usually used to position the lens. In the prior art, an annular bearing surface is usually formed on a jig, when a lens is positioned, the lens is placed on the jig, the bearing surface is attached to a non-functional area of the lens for supporting the lens, then the outer side wall of the lens is clamped, and the outer contour curved surface of the functional area is not supported. However, the contact area between the non-functional area and the bearing surface is relatively small, and the outer contour curved surface of the lens is easy to deform and cannot be recovered when the lens is attached and stressed, so that the product has poor functionality.

Therefore, it is desirable to provide a lens positioning fixture to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lens positioning jig can increase the area of contact with the lens, prevents that the outline curved surface of lens from appearing the deformation phenomenon, has improved the yields.

In order to achieve the purpose, the utility model discloses a following technical scheme realizes:

lens positioning jig includes:

the jig comprises a jig body, a first supporting surface and a second supporting surface, wherein an accommodating groove is formed in the jig body, a vacuum air hole is formed in the bottom of the accommodating groove, the upper end surface of the jig body is circumferentially provided with the first supporting surface along the accommodating groove, and the first supporting surface is used for supporting the edge of a lens;

the supporting piece is convexly arranged at the center of the accommodating groove, the upper end surface of the supporting piece is an arc-shaped second bearing surface, and the second bearing surface is used for supporting the center of the lens;

the positions of the limiting blocks are adjustably arranged on the jig body and along the circumferential intervals of the lenses, and the limiting blocks can clamp the outer side walls of the lenses tightly.

Preferably, the limiting block has a limiting end extending above the first bearing surface, an arc-shaped surface is formed on the limiting end, and the arc-shaped surface is used for abutting against the outer side wall of the lens.

Preferably, the lower end surface of the limiting end and the first bearing surface are arranged in a clearance manner in the height direction.

Preferably, the jig body is provided with a reference hole.

Preferably, the reference hole is a through hole.

Preferably, the number of the reference holes is two, and the two reference holes are arranged at intervals.

Preferably, the number of the vacuum air holes is set to be a plurality, and the plurality of the vacuum air holes are arranged at intervals.

Preferably, the first bearing surface and the second bearing surface are both attached with teflon tapes.

Preferably, the lens clamping device further comprises two clamping mechanisms, the two clamping mechanisms are oppositely arranged and located at two opposite ends of the lens, and the two clamping mechanisms can clamp the outer side wall of the lens.

Preferably, each of the clamping mechanisms includes:

a drive member;

the mounting plate is connected to the output end of the driving piece;

the clamping piece is connected to the tail end of the mounting plate, and the driving piece can drive the mounting plate to drive the clamping piece to move towards the direction close to or away from the lens so as to clamp or release the outer side wall of the lens.

The utility model has the advantages that:

the utility model provides a lens positioning jig, the lens is placed after on the tool body, vacuum gas pocket leads to the negative pressure and adsorbs the lens, the lens drops when preventing the tool upset, then the edge and the first face laminating of bearing of lens, the outline curved surface of lens simultaneously will bear with middle second after slightly warping and lean on the face contact to support the lens, make the lifting surface increase, then fasten a plurality of stoppers on the tool body again, in order to press from both sides the lateral wall of lens tightly, thereby fix the lens. Through setting up support piece, can increase the area of contact with the lens, prevent that the outer contour curved surface of lens from appearing the deformation phenomenon, improved the yields.

Drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly and easily, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and the drawings described below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a lens positioning fixture provided in an embodiment of the present invention after a clamping mechanism and a mounting bracket are hidden;

FIG. 2 is a schematic view of the structure of FIG. 1 with the lens removed;

FIG. 3 is a top view of the overall structure of FIG. 1;

FIG. 4 isbase:Sub>A cross-sectional view taken at A-A of FIG. 3;

FIG. 5 is a schematic view of the structure of FIG. 2 with the stop block removed;

fig. 6 is a schematic structural diagram of a limiting block provided in an embodiment of the present invention;

fig. 7 is a schematic view of an overall structure of a lens positioning fixture according to an embodiment of the present invention.

In the figure:

100. a lens;

1. a jig body; 11. a positioning part; 111. a containing groove; 112. vacuum air holes; 113. a first bearing surface; 12. an installation part; 121. a first mounting hole; 13. a reference hole;

2. a support member; 21. a second bearing surface;

3. a limiting block; 31. a limiting end; 32. an arc-shaped surface; 33. a second mounting hole;

4. a clamping mechanism; 41. a drive member; 42. mounting a plate; 43. a clamping member;

5. mounting a bracket; 51. and adjusting the bolt.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides a lens positioning jig, is applied to VR lens processing technology field. When the lens to VR glasses is pasted the diaphragm and is handled, lens positioning jig is used for fixing a position the lens. This lens positioning jig uses with cooperation such as automation equipment and industry camera usually, and the industry camera can shoot respectively with definite position information to lens and diaphragm, and automation equipment can be attached after lens and diaphragm removal counterpoint according to above-mentioned position information control.

Specifically, as shown in fig. 1 and fig. 2, the lens positioning fixture provided in this embodiment includes a fixture body 1 and a plurality of limiting blocks 3, a receiving groove 111 is formed on the fixture body 1, a vacuum air hole 112 is formed at the bottom of the receiving groove 111, and the vacuum air hole 112 is communicated with a vacuum device to extract air in the vacuum air hole 112, so that a negative pressure is generated in the vacuum air hole 112, thereby sucking the lens 100. The upper end surface of the jig body 1 is circumferentially provided with a first bearing surface 113 along the accommodating groove 111, the first bearing surface 113 is used for supporting the edge of the lens 100, the positions of the plurality of limiting blocks 3 are adjustably arranged on the jig body 1 and are circumferentially spaced along the lens 100, and the plurality of limiting blocks 3 can clamp the outer side wall of the lens 100.

When the fixture is used, the lens 100 is firstly placed on the fixture body 1, the vacuum air hole 112 is communicated with negative pressure to adsorb the lens 100, the lens 100 is prevented from falling off when the fixture is turned over, then the edge of the lens 100 is attached to the first bearing surface 113 to support the lens 100, the outer contour curved surface of the lens 100 is not contacted with the bottom surface of the accommodating groove 111 at the moment, and then the plurality of limiting blocks 3 are fastened on the fixture body 1 to clamp the outer side wall of the lens 100, so that the lens 100 is fixed.

Preferably, as shown in fig. 2, the number of the vacuum air holes 112 is multiple, and the multiple vacuum air holes 112 are arranged at intervals to ensure that the lens 100 is firmly adsorbed and prevent the lens 100 from falling off when the jig is turned over. Illustratively, in the present embodiment, the number of the vacuum air holes 112 is four, four vacuum air holes 112 are uniformly distributed on both sides of the support 2, and two vacuum air holes 112 are disposed on each side. Of course, in other embodiments, the number of the vacuum air holes 112 may also be three, five or more, which is not specifically limited in this embodiment and may be adaptively selected according to actual requirements.

It can be understood that the outer contour of the lens 100 of the VR glasses is an arc shape, and is divided into a functional area and a non-functional area, the non-functional area is an edge position of the lens 100 along the circumferential direction, the rest of the middle portion is the functional area, and the first bearing surface 113 is used for supporting the non-functional area. Since the outer curved surface of the lens 100 is not in contact with the bottom surface of the receiving groove 111, the outer curved surface of the functional area of the lens 100 is not supported. The contact area between the non-functional area and the first bearing surface 113 is smaller, and when the lens 100 is applied with force, the curved surface of the outer contour is easy to deform and cannot be recovered, thereby causing poor product functionality.

In order to solve the above problem, as shown in fig. 2 to 4, the lens positioning fixture provided in this embodiment further includes a supporting member 2, the supporting member 2 is convexly disposed at the center of the accommodating groove 111, an upper end surface of the supporting member 2 is a second bearing surface 21, the second bearing surface 21 is an arc-shaped curved surface and is adapted to the arc-shaped curved surface of the lens 100, and the second bearing surface 21 is used for supporting the center of the lens 100. By arranging the supporting member 2, the contact area with the lens 100 can be increased, the deformation of the outer contour curved surface of the lens 100 is prevented, and the yield is improved.

Preferably, the supporting member 2 and the jig body 1 are integrally formed, and the integrally formed processing mode can simplify the processing procedure, improve the processing efficiency and reduce the cost.

Furthermore, in order to prevent the lens 100 from contacting the fixture body 1 to cause poor appearance such as point damage and scratch, the first support surface 113 and the second support surface 21 are both adhered with teflon tapes. Specifically, after the lens 100 is attached to the first bearing surface 113, the second bearing surface 21 is lower than the outer contour curved surface of the lens 100 by 0.18mm, and this height difference is used to attach a teflon tape with a thickness of 0.15mm, so that there is a margin of 0.03mm between the outer contour curved surface of the lens 100 and the teflon tape on the second bearing surface 21. When the vacuum hole 112 is connected with negative pressure to absorb the lens 100, because the middle of the lens 100 is not contacted with the bearing surface, even if the lens 100 slightly shakes, bad appearance phenomena such as point injury, scratch and the like can not be generated, when the lens 100 is jointed with the first bearing surface 113 to bear force, the outer contour curved surface of the lens 100 is slightly deformed and then contacted with the Teflon adhesive tape on the middle second bearing surface 21, so as to support the lens 100, the stressed area is increased, the outer contour curved surface of the lens 100 is prevented from being deformed, and the yield is improved.

Further, with reference to fig. 2 and 6, each of the limiting blocks 3 has a limiting end 31 extending to the upper side of the first bearing surface 113, an arc surface 32 is formed on the limiting end 31, the arc surface 32 is adapted to the arc shape of the outer side wall of the lens 100, and the arc surface 32 is used for abutting against the outer side wall of the lens 100. When the arc-shaped surface 32 on each limiting block 3 is abutted to the outer side wall of the lens 100, the lens 100 can be accurately positioned without manually repeatedly calibrating the lens 100.

Preferably, the lower end surface of the stopper end 31 is spaced apart from the first bearing surface 113 in the height direction. It should be noted that, when the teflon tape is attached to the first bearing surface 113, the outer edge of the tape can extend into the gap, and the lower end surface of the limiting end 31 can press the outer edge of the tape, so that the tape does not interfere with the industrial camera during the visual imaging.

Further, as shown in fig. 5, the jig body 1 specifically includes a positioning portion 11 and four mounting portions 12, the accommodating groove 111, the first bearing surface 113 and the supporting member 2 are all disposed on the positioning portion 11, the four mounting portions 12 are uniformly disposed at four corners of the positioning portion 11 along the circumferential direction of the positioning portion 11, and as shown in fig. 2, each mounting portion 12 is correspondingly provided with a limiting block 3.

Specifically, as shown in fig. 5, each mounting portion 12 is provided with a first mounting hole 121, as shown in fig. 2, each limiting block 3 is provided with a second mounting hole 33 at a position corresponding to the first mounting hole 121, and a fastener (not shown in the figure) sequentially penetrates through the second mounting hole 33 and the first mounting hole 121 so as to fix the limiting block 3 on the mounting portion 12. Wherein the fastener is preferably a bolt and nut combination.

Preferably, the aperture of the second mounting hole 33 is slightly larger than the aperture of the first mounting hole 121, so that the positions of the limiting blocks 3 can be finely adjusted, and further, the limiting blocks 3 can be compatible with the tolerance change of the lens 100 produced by the same set of mold, so that the field adjustment is convenient, and the universality is strong.

Preferably, as shown in fig. 5, the number of the first mounting holes 121 is set to be plural, and the hole diameters of the plural first mounting holes 121 may be the same or different. Correspondingly, as shown in fig. 6, the number of the second mounting holes 33 is also set to be multiple, the apertures of the second mounting holes 33 may be the same or different, the first mounting holes 121 and the second mounting holes 33 are arranged in a one-to-one correspondence, and a fastening member is arranged in each first mounting hole 121 and the corresponding second mounting hole 33, so that the stability of the connection between the limiting block 3 and the mounting portion 12 is further improved.

Further, as shown in fig. 5, the jig body 1 is provided with a reference hole 13. The reference hole 13 is a positioning point, i.e., mark point, photographed by the industrial camera, so as to align the film with the lens 100 through visual positioning, thereby ensuring that the film can be accurately attached to the lens 100.

In the prior art, the reference hole 13 is usually set as a blind hole, and the bottom of the jig body 1 does not penetrate through the reference hole. When the industrial camera is used for polishing the reference hole 13 and taking a picture to obtain a position, the bottom of the reference hole 13 reflects light, so that the imaging effect of the industrial camera is interfered, and the alignment effect of the diaphragm and the lens 100 is influenced.

To solve the above problem, in the present embodiment, the reference hole 13 is provided as a through hole. When the industrial camera is used for polishing the reference hole 13 and taking a picture to obtain a position, the through hole can not reflect light, the interference of the reflection of light on the visual imaging of the industrial camera is avoided, the alignment effect of the diaphragm and the lens 100 is ensured, and the diaphragm can be accurately attached to the lens 100.

Preferably, as shown in fig. 5, the number of the reference holes 13 is two, and the two reference holes 13 are provided at intervals. Two benchmark holes 13 can further improve the counterpoint precision of diaphragm and lens 100, have further guaranteed that the diaphragm can be attached on lens 100 accurately.

Further, as shown in fig. 7, the lens positioning fixture provided in this embodiment further includes two clamping mechanisms 4, the two clamping mechanisms 4 are disposed oppositely and located at two opposite ends of the lens 100, and the two clamping mechanisms 4 can clamp the outer sidewall of the lens 100. Two clamping mechanism 4 and above-mentioned stopper 3 cooperation use, can carry out the secondary to lens 100 and press from both sides tight location, improve the location effect. In other embodiments, the number of the clamping mechanisms 4 may also be four, and two clamping mechanisms may be arranged in pairs, which is not specifically limited in this embodiment, and may be adaptively selected according to actual requirements.

Specifically, as shown in fig. 7, each of the clamping mechanisms 4 includes a driving member 41, a mounting plate 42, and a clamping member 43, the mounting plate 42 being connected to an output end of the driving member 41, and the clamping member 43 being connected to a distal end of the mounting plate 42. After the four limiting blocks 3 clamp the lens 100 tightly, the two driving parts 41 drive the corresponding mounting plates 42 to drive the clamping parts 43 to move towards the direction close to the lens 100 at the same time, so as to clamp the outer side wall of the lens 100 tightly, thereby realizing secondary clamping and positioning and further improving the positioning effect.

Further, as shown in fig. 7, the lens positioning fixture provided in this embodiment further includes a mounting bracket 5, and the fixture body 1 and the clamping mechanism 4 are both fixedly mounted on the mounting bracket 5. Since the film is attached to the lens 100 in a vacuum environment, the lens positioning fixture needs to be placed in a vacuum chamber (not shown), and the mounting bracket 5 is mounted on the bottom surface of the vacuum chamber. All threaded connection in the four corners position of installing support 5 has adjusting bolt 51, and adjusting bolt 51's bottom surface butt in vacuum cavity's bottom surface, through revolving the adjusting bolt 51 who revolves the corresponding position, can adjust the height that installing support 5 corresponds the position to can adjust the plane degree of tool body 1.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. Lens positioning jig, its characterized in that includes:

the jig comprises a jig body (1), wherein a containing groove (111) is formed in the jig body, a vacuum air hole (112) is formed in the bottom of the containing groove (111), a first bearing surface (113) is formed on the upper end surface of the jig body (1) along the circumferential direction of the containing groove (111), and the first bearing surface (113) is used for supporting the edge of a lens (100);

the supporting piece (2) is convexly arranged at the center of the accommodating groove (111), the upper end surface of the supporting piece (2) is an arc-shaped second bearing surface (21), and the second bearing surface (21) is used for supporting the center of the lens (100);

the positions of the limiting blocks (3) are adjustably arranged on the jig body (1) and are arranged along the circumferential direction of the lens (100) at intervals, and the outer side wall of the lens (100) can be clamped tightly by the limiting blocks (3).

2. The lens positioning fixture according to claim 1, wherein the limiting block (3) has a limiting end (31) extending above the first bearing surface (113), an arc-shaped surface (32) is formed on the limiting end (31), and the arc-shaped surface (32) is used for abutting against an outer side wall of the lens (100).

3. The lens positioning fixture according to claim 2, wherein the lower end surface of the limiting end (31) is spaced from the first bearing surface (113) in the height direction.

4. The lens positioning fixture according to claim 1, wherein the fixture body (1) is provided with a reference hole (13).

5. The lens positioning jig according to claim 4, wherein the reference hole (13) is a through hole.

6. The lens positioning jig according to claim 5, wherein the number of the reference holes (13) is two, and the two reference holes (13) are arranged at intervals.

7. The lens positioning jig according to any one of claims 1 to 6, wherein the number of the vacuum air holes (112) is provided in plurality, and the plurality of vacuum air holes (112) are provided at intervals.

8. The lens positioning fixture of any one of claims 1-6, wherein the first bearing surface (113) and the second bearing surface (21) are attached with Teflon tape.

9. The lens positioning fixture according to any one of claims 1 to 6, further comprising two clamping mechanisms (4), wherein the two clamping mechanisms (4) are oppositely arranged and located at two opposite ends of the lens (100), and the two clamping mechanisms (4) can clamp the outer side wall of the lens (100).

10. The lens positioning jig according to claim 9, characterized in that each of the clamping mechanisms (4) comprises:

a driver (41);

a mounting plate (42) connected to an output end of the driving member (41);

the clamping piece (43) is connected to the tail end of the mounting plate (42), and the driving piece (41) can drive the mounting plate (42) to drive the clamping piece (43) to move towards the direction close to or away from the lens (100) so as to clamp or release the outer side wall of the lens (100).

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