CN111999845A

CN111999845A - Lens module

Info

Publication number: CN111999845A
Application number: CN202010948058.4A
Authority: CN
Inventors: 马杰
Original assignee: Ruitai Optics Changzhou Co Ltd
Current assignee: Ruitai Optics Changzhou Co Ltd
Priority date: 2020-06-30
Filing date: 2020-09-10
Publication date: 2020-11-27
Anticipated expiration: 2040-09-10
Also published as: WO2022000784A1; CN111999845B

Abstract

The invention provides a lens module, which comprises a lens barrel and at least one lens accommodated in an accommodating space, wherein the lens barrel comprises an inner side wall which is enclosed into the accommodating space, the lens is provided with an outer side wall which is arranged opposite to the inner side wall, the lens module also comprises a plurality of bulges arranged on the outer side wall and a plurality of grooves formed on the inner side wall, the bulges are inserted in the grooves along the axial direction of the lens module in a one-to-one correspondence manner, the bulges are provided with a first size which extends along the radial direction of the lens module, the grooves corresponding to the bulges are provided with a second size which extends along the radial direction, the first size is larger than the second size, the bulges are provided with first connecting parts, and the groove walls of the grooves are provided with. After the protrusions are inserted into the grooves, only part of the protrusions are contained in the grooves in the radial direction, the outer side walls of the lenses are prevented from being matched with the inner side walls of the lens barrels in a whole circle, and therefore when the roundness of the outer side walls of the lenses and/or the inner side walls of the lens barrels is in a problem, abnormal assembly is avoided, and the yield is improved.

Description

Lens module

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of optical lenses, in particular to a lens module.

[ background of the invention ]

In the lens module of the prior art, the outer diameter of the lens needs to be matched with the inner diameter of the lens barrel in a whole circle so as to fix the lens in the lens barrel. When the outer diameter of the lens and/or the roundness of the inner diameter of the lens barrel have problems, the assembly is easy to be abnormal, and the yield is influenced.

Therefore, it is desirable to provide a lens module.

[ application contents ]

The invention aims to provide a lens module to solve the technical problem that the assembly is easy to be abnormal when the outer diameter of a lens and/or the roundness of the inner diameter of a lens barrel are/is problems.

The technical scheme of the invention is as follows:

a lens module comprises a lens barrel with a containing space and at least one lens contained in the containing space, the lens barrel comprises an inner side wall which is enclosed into the accommodating space, the lens is provided with an outer side wall which is arranged opposite to the inner side wall, the lens module further includes a plurality of protrusions provided on one of the inner sidewall and the outer sidewall, and a plurality of grooves formed on the other of the inner sidewall and the outer sidewall, each of the protrusions being inserted into each of the grooves in a one-to-one correspondence along an axial direction of the lens module, the protrusions having a first dimension extending in a radial direction of the lens module, the groove corresponding to the projection has a second dimension extending in the radial direction, the first dimension being greater than the second dimension, the protrusion is provided with a first connecting part, and the groove wall of the groove is provided with a second connecting part abutted against the first connecting part.

In some embodiments of the lens module, the protrusion includes a first curved surface and a second curved surface located on two sides of the first curved surface, the first curved surface protrudes outward away from the outer side wall, the first connection portion is formed on the first curved surface, the second curved surface includes a first side located on the outer side wall and a second side extending to the first curved surface away from the outer side wall, and the second curved surface is recessed away from the outer side wall.

In some embodiments of the lens module, the first curved surface protrudes outward in the radial direction away from the outer sidewall, and an included angle between the inward concave direction of the second curved surface and the radial direction is 30 ° to 60 °.

In some embodiments of the lens module, the groove wall includes a third curved surface and fourth curved surfaces located at two sides of the third curved surface, the third curved surface is concave along the radial direction towards the direction away from the inner side wall, the fourth curved surface is convex inwards towards the direction away from the inner side wall, and an included angle between the convex direction of the fourth curved surface and the radial direction is smaller than an included angle between the concave direction of the second curved surface and the radial direction.

In some embodiments of the lens module, the protrusion has a third dimension extending in the axial direction, and the groove has a fourth dimension extending in the axial direction, the third dimension being smaller than the fourth dimension.

In some embodiments of the lens module, the first connecting portion and the second connecting portion are in point contact, line contact or surface contact.

In some embodiments of the lens module, the protrusions are uniformly distributed around the axial direction.

In some embodiments of the lens module, the cross-sectional areas of the protrusions are equal or gradually decrease along the insertion direction, and the cross-section is located in a plane perpendicular to the axial direction.

In some embodiments of the lens module, an included angle between an axis of the protrusion and the axial direction is 3 ° to 8 °.

In some embodiments of the lens module, the cross section includes a first arc formed by the plane intercepting the first curved surface and a second arc formed by the plane intercepting the second curved surface, an angle of the first arc is 98-132 °, an angle of the second arc is 48-63 °, and a chord length of the first arc is 1-2 times of a chord length of the second arc.

The invention has the beneficial effects that:

the lens module comprises the protrusions which are larger than the grooves along the radial dimension of the lens module, so that only part of the protrusions are contained in the grooves in the radial direction after the protrusions are inserted into the grooves, the outer side walls of the lenses are prevented from being matched with the inner side walls of the lens barrels in a whole circle, and therefore abnormal assembly is avoided when the roundness of the outer side walls of the lenses and/or the inner side walls of the lens barrels has a problem, and the yield is improved.

[ description of the drawings ]

FIG. 1 is a schematic view of a lens module according to an embodiment of the present invention;

FIG. 2 is an exploded view of a lens module according to an embodiment of the present invention;

FIG. 3 is an enlarged view of part A of FIG. 2;

fig. 4 is a schematic structural view of a lens module along an inserting direction according to an embodiment of the present invention;

FIG. 5 is an enlarged view of the portion B of FIG. 4;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 4;

FIG. 7 is an enlarged view of the portion D of FIG. 6;

FIG. 8 is an exploded view of a lens module according to another embodiment of the present invention;

FIG. 9 is an enlarged view of section E of FIG. 8;

FIG. 10 is a schematic view of a lens module according to another embodiment of the present invention, taken along an inserting direction;

FIG. 11 is an enlarged view of the portion F of FIG. 10;

FIG. 12 is a sectional view taken along line G-G of FIG. 10;

fig. 13 is an enlarged schematic view of the portion H in fig. 12.

[ detailed description ] embodiments

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1 to 13, a lens module 10 according to the present invention will be described. The lens module 10 includes a lens barrel 100 having a receiving space 110 and at least one lens 200 received in the receiving space 110. The lens barrel 100 includes an inner sidewall 120 and a bottom wall 130, the inner sidewall 120 can be enclosed to form an accommodating space 110, and an aperture hole 131 is formed on the bottom wall 130 for allowing imaging light to pass through. Further, the lens 200 has an outer sidewall 210 disposed opposite to the inner sidewall 120, the lens module 10 further includes a plurality of protrusions 220 disposed on one of the inner sidewall 120 and the outer sidewall 210, and a plurality of grooves 140 formed on the other of the inner sidewall 120 and the outer sidewall 210, and the protrusions 220 are axially inserted into the grooves 140 in the lens module 10 in a one-to-one correspondence. In this embodiment, the protrusion 220 is disposed on the outer sidewall 210 and the groove 140 is formed on the inner sidewall 120. It is understood that in other embodiments, the protrusion 220 is disposed on the inner sidewall 120. The groove 140 is formed on the outer sidewall 210, or a part of the protrusion 220 of each protrusion 220 is located on the inner sidewall 120, another part of the protrusion 220 is located on the outer sidewall 210, and correspondingly, a part of the groove 140 is formed on the inner sidewall 120, and another part of the groove 140 is formed on the outer sidewall 210. Specifically, in the present embodiment, the number of the protrusions 220 is 8, and each protrusion 220 is uniformly distributed on the outer sidewall 210 by taking the axial direction as the axis. Similarly, the number of the grooves 140 is 8 and the grooves and the protrusions 220 are distributed on the inner sidewall 120 in a one-to-one correspondence. It should be understood that in other embodiments, the number of the protrusions 220 may also be three or more, and the protrusions 220 may also be unevenly distributed on the inner sidewall 120, as long as the protrusions 220 are not distributed in the same semicircle.

Further, the protrusion 220 has a first dimension extending along the radial direction of the lens module 10, and the groove 140 corresponding to the protrusion 220 has a second dimension extending along the radial direction, wherein the first dimension is larger than the second dimension, that is, the dimension of the protrusion 220 protruding out of the outer sidewall 210 in the radial direction is larger than the dimension of the groove 140 recessing into the inner sidewall 120 in the radial direction. Further, the protrusion 220 has a first connection portion, and a groove wall of the groove 140 has a second connection portion abutting against the first connection portion. When the lens 200 is assembled with the lens barrel 100, the protrusion 220 is inserted into the groove 140 along the axial direction. Because the bulge 220 is only partially accommodated in the groove 140 in the radial direction, a gap is formed between the inner side wall 120 and the outer side wall 210 at the butting position of the non-first connecting part and the non-second connecting part, therefore, the lens 200 and the lens barrel 100 only form eight connecting positions, the complete-circle matching of the outer side wall 210 of the lens 200 and the inner side wall 120 of the lens barrel 100 is avoided, the complete-circle matching is changed into eight butting matching, the assembling stability is ensured, meanwhile, the abnormal assembling when the roundness of the outer side wall 210 and/or the inner side wall 120 has a problem is avoided, and the yield is. Further, the first connecting portion and the second connecting portion are in point contact, line contact or surface contact to realize abutting, so that the processing precision of the lens 200 and the lens barrel 100 at the non-connecting position is effectively reduced, and the cost of the lens module 10 is reduced. Specifically, the axial direction is parallel to the direction indicated by the arrow X1 in fig. 3 and the direction indicated by the arrow X2 in fig. 9, and the radial direction is parallel to the direction indicated by the arrow Y1 in fig. 5 and the direction indicated by the arrow Y2 in fig. 11.

Referring to fig. 2 to 7, in one embodiment, the cross-sectional areas of the protrusions 220 are equal along the insertion direction, and the cross-sections are in a plane perpendicular to the axial direction. The protrusion 220 includes a first curved surface 221 and second curved surfaces 222 located at both sides of the first curved surface 221. The first curved surface 221 is convex outward away from the outer sidewall 210. In this embodiment, the first curved surface 221 is convex outward in a radial direction away from the outer sidewall 210. Further, the second bending surface 222 includes a first side edge 2221 located on the outer side wall 210 and a second side edge 2222 extending to the first bending surface 221 in a direction away from the outer side wall 210, and the second bending surface 222 is concave in a direction away from the outer side wall 210. The cross section comprises a first arc formed by cutting the first bending surface 221 on the plane and a second arc formed by cutting the second bending surface 222 on the plane, the angle of the first arc is 98-132 degrees, the angle of the second arc is 48-63 degrees, and the chord length of the first arc is 1-2 times of the chord length of the second arc.

In this embodiment, the groove wall includes a third curved surface 141 and fourth curved surfaces 142 located at both sides of the third curved surface 141. In this embodiment, the third curved surface 141 is concave in a direction away from the inner sidewall 120 along the radial direction, and the fourth curved surface 142 is convex in a direction away from the inner sidewall 120. The first curved surface 221 faces and abuts against the third curved surface 141 to form a first connection portion on the first curved surface 221 and a second connection portion on the third curved surface 141. The foregoing plane intersects the third curved surface 141 to form a first arc and intersects the fourth curved surface 142 to form a second arc. The curvature of the first arc line is smaller than that of the first circular arc, and the chord length of the first arc line is 2 times of that of the first circular arc. The curvature of the second arc line is smaller than that of the second circular arc, and the chord length of the second arc line is equal to that of the second circular arc.

Further, the included angle between the concave direction of the second curved surface 222 and the radial direction is 30 to 60 °. The included angle between the convex direction and the radial direction of the fourth curved surface 142 is smaller than the included angle between the concave direction and the radial direction of the second curved surface 222. The protrusion 220 has a third dimension extending in the axial direction and the recess 140 has a fourth dimension extending in the axial direction, the third dimension being smaller than the fourth dimension.

Referring to fig. 8 to 13, in another embodiment, the cross-sectional areas of the protrusions 220 are gradually reduced along the insertion direction, and the cross-sections are in a plane perpendicular to the axial direction. The included angle between the axial line of the bulge 220 and the axial direction is 3-8 degrees. The protrusion 220 includes a first curved surface 221 and second curved surfaces 222 located at both sides of the first curved surface 221. The first curved surface 221 is convex outward away from the outer sidewall 210. In this embodiment, the first curved surface 221 is convex outward in a radial direction away from the outer sidewall 210. Further, the second bending surface 222 includes a first side edge 2221 located on the outer side wall 210 and a second side edge 2222 extending to the first bending surface 221 in a direction away from the outer side wall 210, and the second bending surface 222 is concave in a direction away from the outer side wall 210. The cross section comprises a first arc formed by cutting the first bending surface 221 on the plane and a second arc formed by cutting the second bending surface 222 on the plane, the angle of the first arc is 98-132 degrees, the angle of the second arc is 48-63 degrees, and the chord length of the first arc is 1-2 times of the chord length of the second arc.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. A lens module comprises a lens barrel with a containing space and at least one lens contained in the containing space, the lens barrel comprises an inner side wall which is enclosed into the accommodating space, the lens is provided with an outer side wall which is arranged opposite to the inner side wall, the lens module further includes a plurality of protrusions provided on one of the inner sidewall and the outer sidewall, and a plurality of grooves formed on the other of the inner side wall and the outer side wall, each of the protrusions being inserted into each of the grooves in a one-to-one correspondence along the axial direction of the lens module, the lens module is characterized in that the bulge has a first size extending along the radial direction of the lens module, the groove corresponding to the bulge has a second size extending along the radial direction, the first size is larger than the second size, the protrusion is provided with a first connecting portion, and the groove wall of the groove is provided with a second connecting portion abutted against the first connecting portion.

2. The lens module as set forth in claim 1, wherein: the arch includes first curved surface and is located the second curved surface of first curved surface both sides, first curved surface is towards keeping away from lateral wall direction evagination, first connecting portion form in first curved surface, the second curved surface is including being located first side on the lateral wall and keeping away from the lateral wall direction extends to the second side of first curved surface, the second curved surface is towards keeping away from the lateral wall direction indent.

3. The lens module as set forth in claim 2, wherein: the first bending surface protrudes outwards along the radial direction and is far away from the outer side wall, and the included angle between the inward concave direction of the second bending surface and the radial direction is 30-60 degrees.

4. The lens module as set forth in claim 3, wherein: the cell wall includes the third curved surface and is located the fourth curved surface of third curved surface both sides, the third curved surface is followed radially to keeping away from inside wall direction indent, the fourth curved surface is towards keeping away from evagination in the inside wall direction, the evagination direction of fourth curved surface with radial contained angle is less than the indent direction of second curved surface with radial contained angle.

5. The lens module as set forth in claim 4, wherein: the projection has a third dimension extending in the axial direction and the recess has a fourth dimension extending in the axial direction, the third dimension being less than the fourth dimension.

6. The lens module as set forth in claim 1, wherein: the first connecting part and the second connecting part are in point contact, line contact or surface contact.

7. The lens module as set forth in claim 1, wherein: the protrusions are uniformly distributed by taking the axial direction as an axis.

8. The lens module as claimed in any one of claims 2 to 7, wherein: the cross-sectional areas of the protrusions are equal or gradually reduced along the inserting direction, and the cross sections are located in a plane perpendicular to the axial direction.

9. The lens module as set forth in claim 8, wherein: the included angle between the axial line of the bulge and the axial direction is 3-8 degrees.

10. The lens module as set forth in claim 8, wherein: the section comprises a first arc formed by cutting the first bending surface through the plane and a second arc formed by cutting the second bending surface through the plane, the angle of the first arc ranges from 98 degrees to 132 degrees, the angle of the second arc ranges from 48 degrees to 63 degrees, and the chord length of the first arc is 1-2 times of the chord length of the second arc.