CN102736208A - Lens module - Google Patents

Abstract

The invention relates to a lens module, which comprises a fixed cylinder, a long tooth part and a guide shaft, wherein the fixed cylinder comprises a shell and an accommodating groove, the shell forms the accommodating groove and comprises an upper surface and an inner surface, the long tooth part comprises a positioning groove, a top surface and a bottom surface, the long tooth part is arranged in the accommodating groove, the guide shaft is arranged in the positioning groove, the distance from the upper surface to the inner surface of the fixed cylinder is a first length, the distance from the top surface to the bottom surface of the long tooth part is a second length, the distance from the upper surface to the bottom surface of the long tooth part is defined as a third length, and the sum of the first length and the second length is greater than the third length.

Description

lens module

technical field

The invention relates to a lens module, in particular to a lens module provided with long teeth for driving.

Background technique

FIG. 1 is a schematic cross-sectional view of a known lens module.

Please refer to FIG. 1 , the known lens module 10 includes a fixed barrel 11, a guide shaft 12 and a long tooth portion 13, the fixed barrel 11 includes a housing 111 and an accommodating groove 112, the housing 111 includes an upper surface 113 and an inner surface 114, the guide The shaft 12 is located in the accommodating groove 112, the long tooth part 13 includes a positioning groove 131, a top surface 132 and a bottom surface 133, the long tooth part 13 is placed in the accommodating groove 112 and the guide shaft 12 is placed in the positioning groove 131, so the long tooth The part 13 is rotatable along the guide shaft 12 to drive the lens.

Due to the need to take into account the strength of the fixed cylinder 11, the fixed cylinder 11 needs a certain thickness, as shown in Figure 1, this thickness is the distance D1 (hereinafter referred to as the first length D1) from the upper surface 113 of the fixed cylinder 11 to the inner surface 114; The distance from the top surface 132 to the bottom surface 133 of the long tooth portion 13 is defined as the second length D2, and the distance from the upper surface 113 of the fixed cylinder 11 to the bottom surface 133 of the long tooth portion 13 is defined as the third length D3, as shown in FIG. 1 As shown, the sum of the first length D1 and the second length D2 is equal to the third length D3; since the thickness of the fixed barrel 11 (namely the first length D1) must maintain a specific length, it is known that the thickness of the lens module 10 will be reduced Restricted, unable to achieve frivolous goals.

Since the volume of current photographic equipment is required to be thinner and thinner, if the height of the lens module 10 can be reduced in terms of mechanism design, the volume of the photographic equipment can also be reduced at the same time.

Contents of the invention

The technical problem to be solved by the present invention is to provide a lens module that can reduce the thickness of the lens module in view of the defect that the thickness of the lens module in the prior art is limited.

The technical solution adopted by the present invention to solve the technical problem is to provide a lens module, which includes a fixed cylinder, a long tooth part and a guide shaft, the fixed cylinder includes a housing and an accommodation groove, and the housing forms the accommodation groove and includes an upper surface And the inner surface, the long tooth portion includes a positioning groove, a top surface and a bottom surface, the long tooth portion is placed in the accommodation groove, the guide shaft is arranged in the positioning groove, the distance from the upper surface of the fixed cylinder to the inner surface is a first length, and the length is The distance from the top surface to the bottom surface of the tooth portion is the second length, and the distance from the upper surface of the fixed cylinder to the bottom surface of the long tooth portion is defined as the third length, and the sum of the first length and the second length is greater than the third length.

The invention provides a lens module, which includes a fixed cylinder, a guide shaft and a long tooth part. The fixed cylinder includes a housing, an accommodation groove, a first concave portion and a first relative protrusion, the housing forms the accommodation groove, the first depression is adjacent to the first relative protrusion, and the long tooth portion includes a positioning groove , the second concave part and the second relative protruding part, the long tooth part is placed in the accommodating groove, the guide shaft is connected with the positioning groove, the second concave part is adjacent to the second relative protruding part, wherein the first concave part The part fits with the second relative protruding part, and the first relative protruding part fits with the second recessed part.

It should be noted that the depth of the first recess is the same as the height of the second opposite protrusion.

It should be noted that the depth of the second concave portion is the same as the height of the first opposing convex portion.

The lens module implementing the present invention has the following beneficial effects: the first length of the fixed cylinder overlaps with the second length of the long tooth part by using the mechanism design, which can reduce the distance between the upper surface of the fixed cylinder and the bottom surface of the long tooth part. The distance, that is, the distance of the third length, can effectively reduce the overall height of the lens module, and can meet the requirements of the increasingly light and thin volume of current photographic equipment. In addition, since the long tooth part will rotate along the guide shaft to drive the lens, although the present invention reduces the thickness of part of the fixed cylinder, the part of the fixed cylinder close to the guide shaft still maintains a certain length. Therefore, when the lens module is driven, the fixed The barrel still provides the required structural strength.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a known lens module;

2 is a schematic diagram of a lens module according to an embodiment of the present invention;

Fig. 3 is a schematic cross-sectional view along line 3-3' of Fig. 2 .

Detailed ways

FIG. 2 is a schematic diagram of a lens module according to an embodiment of the invention. Fig. 3 is a schematic cross-sectional view along line 3-3' of Fig. 2 .

Please refer to FIGS. 2 and 3 , the lens module 20 includes a fixed cylinder 21 , a guide shaft 22 and a long tooth portion 23 , and the fixed cylinder 21 includes a housing 211 , an accommodating groove 212 , a first concave portion 213 and a first relative protruding portion 214 The housing 211 forms a receiving groove 212 and includes an upper surface 215 and an inner surface 216 . In this embodiment, the first concave portion 213 and the first relative protruding portion 214 are disposed adjacent to each other.

The guide shaft 22 extends from the upper surface 215 of the housing 211 to the accommodating groove 212, and is located in the accommodating groove 212. The long tooth portion 23 includes a positioning groove 231, a second relative protruding portion 232, a second concave portion 233, a top On the surface 234 and the bottom surface 235 , the long tooth portion 23 is placed in the receiving groove 212 , and the guide shaft 22 is disposed in the positioning groove 231 , so the long tooth portion 23 can rotate along the guide shaft 22 to drive the lens (not shown). In this embodiment, the second recessed portion 233 is adjacent to the second relative protruding portion 232, and the first recessed portion 213 is fitted with the second relative protruding portion 232, and the first relative protruding portion 214 is connected to the second relative protruding portion 232. The two recesses 233 fit together.

It should be noted that the depth of the first recessed portion 213 is the same as the height of the second opposing protrusion 232 , and the depth of the second recessed portion 233 is the same as the height of the first opposing protrusion 214 . When the first concave portion 213 and the second relative protruding portion 232 are engaged with each other and the second concave portion 233 is fitted with the first relative protruding portion 214, the first relative protruding portion 214 and the second relative protruding portion 232 will overlap each other in the horizontal direction. More clearly, the heights of the first relative protrusion 214 and the second relative protrusion 232 are respectively absorbed by the second recess 233 and the first recess 213. Therefore, the lens The overall height of the module 20 will be reduced.

It should be noted that the distance from the upper surface 215 of the fixed cylinder 21 to the inner surface 216 of the first opposing protrusion 214 is defined as a first length D1', and the top surface of the second opposing protrusion 232 of the long tooth portion 23 234 to the bottom surface 235 is defined as the second length D2', and the distance from the upper surface 215 of the fixed cylinder 21 to the bottom surface 235 of the long tooth portion 23 is defined as the third length D3', in this embodiment, the first length The sum of D1' and the second length D2' is greater than the third length D3'. Since the first length D1' of the fixed barrel 21 partially overlaps with the second length D2' of the long teeth, the sum of the first length D1' and the second length D2' will be greater than the third length of the lens module 20. The length D3', that is, the first length D1' of the fixed cylinder 21 partially overlaps with the second length D2' of the long tooth portion 23, so as to reduce the distance between the upper surface 215 of the fixed cylinder 21 and the bottom surface 235 of the long tooth portion 23. distance.

It can be known from the above that the lens module 20 of this embodiment utilizes a mechanism design so that the first length D1' of the fixed cylinder 21 partially overlaps the second length D2' of the long tooth portion 23, thereby reducing the upper surface 215 of the fixed cylinder 21. The distance to the bottom surface 235 of the long tooth portion 23 is the distance of the third length D3 ′, so the overall height of the lens module 20 can be effectively reduced, which can meet the requirement of increasingly light and thin photographic equipment. In addition, since the long tooth part 23 will rotate along the guide shaft 22 to drive the lens, the part of the fixed cylinder 21 close to the guide shaft 22 may bear a large force when the long tooth part 23 rotates. Part of the thickness of the barrel 21, but the portion of the fixed barrel 21 close to the guide shaft 22 still maintains a certain length. Therefore, when the lens module 20 is driven, the fixed barrel 21 can still provide the required structural strength.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention can not be limited with this. All simple equivalent changes and modifications made according to the patent scope of the present invention and the description of the invention are still within the scope of this invention. within the scope of invention patents. In addition, any embodiment or claim of the present invention does not need to achieve all the objects or advantages or features disclosed in the present invention. In addition, the abstract and the title are only used to assist the search of patent documents, and are not used to limit the scope of rights of the present invention.

Claims (7)

1. A lens module, characterized in that, comprising: The fixed cylinder includes a housing and a receiving groove, wherein the housing forms the receiving groove and includes an upper surface and an inner surface; guide shaft; and The long tooth part includes a positioning groove, a top surface and a bottom surface, wherein the long tooth part is placed in the accommodating groove, and the guide shaft is arranged in the positioning groove; Wherein, the distance from the upper surface of the fixed cylinder to the inner surface is a first length, the distance from the top surface of the long tooth part to the bottom surface is a second length, and the distance from the upper surface of the fixed cylinder to the long tooth part is The bottom surface is defined as a third length, and the sum of the first length and the second length is greater than the third length. 2. The lens module according to claim 1, wherein the fixing barrel further comprises a first concave portion and a first relative protrusion, the first concave portion is disposed adjacent to the first relative protrusion, The elongated tooth portion further includes a second concave portion and a second relative protruding portion, the second concave portion is adjacent to the second relative protruding portion, and the first concave portion is embedded in the second relative protruding portion. together, the first relative protruding part fits with the second recessed part. 3. The lens module as claimed in claim 2, wherein the depth of the first concave portion is the same as the height of the second relative convex portion. 4. The lens module as claimed in claim 2, wherein the depth of the second concave portion is the same as the height of the first relative protruding portion. 5. A lens module, characterized in that, comprising: The fixed cylinder includes a housing, a housing groove, a first recess and a first relative protrusion, wherein the housing forms the housing groove, and the first depression is adjacent to the first relative protrusion; guide shaft; and The long tooth part includes a positioning groove, a second concave part and a second relative protruding part, wherein the long tooth part is placed in the accommodating groove, the guide shaft is set in the positioning groove, the second concave part and the the second relative protrusions are disposed adjacently; Wherein, the first concave portion fits with the second relative protruding portion, and the first relative protruding portion fits with the second concave portion. 6 . The lens module as claimed in claim 5 , wherein the depth of the first recess is the same as the height of the second relative protrusion. 7 . 7. The lens module as claimed in claim 5, wherein the depth of the second concave portion is the same as the height of the first relative protruding portion.

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