CN101592768B

CN101592768B - Lens module

Info

Publication number: CN101592768B
Application number: CN2008103018478A
Authority: CN
Inventors: 张仁淙
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2008-05-30
Filing date: 2008-05-30
Publication date: 2012-05-30
Anticipated expiration: 2028-05-30
Also published as: CN101592768A

Abstract

The invention discloses a lens module, which comprises a cylindrical lens barrel, a lens accommodated in the lens barrel, a lens barrel ring surrounding the lens barrel and a lens seat with a through hole, wherein the inner wall of the through hole is provided with internal thread; the inner wall of the lens barrel ring is provided with a plurality of circular grooves which are parallelly arranged; the outer wall of the lens barrel is convexly provided with at least two clamp plugs which have the same distance to the central shaft of the lens barrel; the clamp plugs are clamped in the grooves and fix the lens barrel in the lens barrel ring; the outer surface of the lens barrel ring is provided with external thread; and the lens barrel ring is accommodated in the lens seat through the internal thread and the external thread.

Description

The camera lens module

Technical field

The present invention relates to a kind of camera lens module, relate in particular to that a kind of volume is little, reduce eccentric camera lens module in the lens barrel motion process.

Background technology

The optical module of digital camera needs to drive eyeglass and moves to reach zoom, focusing purpose in order to realize zoom, focus function.

At present, the mode of focusing, zoom has a variety of, is mechanical type focusing, the zoom lens of power source as adopting step motor or servo motor, perhaps utilizes the interactional principle in magnetic field to focus, zoom etc.Though these modes have had relatively ripe placement technology, yet this zoom, focus lens generally all need considerable precision mechanical transmission mechanism.Not only mechanical framework is complicated, and has the disappearance that number of assembling steps is loaded down with trivial details, volume is big and with high costs, also has power consumption to reach the shortcoming of noise greatly simultaneously.For the camera that needs miniaturization, for example use minisize photography device on mobile phone, PDA(Personal Digital Assistant) or notebook computer etc., the then mechanical type of the big volume of this kind focusing, zoom lens are obviously and be not suitable for.

The camera lens module that a kind of principle of utilizing magnetic field interaction is focused comprises lens barrel, around lens barrel ring, elastic construction and the drive division of lens barrel.Drive division comprises magnet and coil, when coil electricity, generates an electromagnetic field around the coil, and magnet rotates under the effect of electromagnetic field, thereby drive lens barrel ring moves along the optical axis direction of lens barrel.Elastic construction plays buffering lens barrel suffered power, makes lens barrel rest on preset near-end or far-end to reach the initial focal length of adjustment camera lens module.

Yet the camera lens module needs bigger receiving space of bigger needs to accommodate coil, magnet, elastic construction and drive division, thereby makes the volume of whole camera lens module bigger; Again, utilize the distortion of elastic construction to adjust the focal length of camera lens module, it is eccentric to make lens barrel produce in moving process and between the lens barrel ring.

Summary of the invention

In view of this, be necessary to provide that a kind of volume is less, reduce the camera lens module of degree of eccentricity in the moving process.

A kind of camera lens module; Comprise the tubular lens barrel, be contained in the eyeglass in the said lens barrel, a microscope base that centers on the lens barrel ring of said lens barrel and have through hole; Said through-hole wall is provided with internal thread, has some ring-shaped grooves that are arranged in parallel on the inwall of said lens barrel ring, equidistant two snibs of the central shaft that said lens barrel outer wall convexes to form at least two said lens barrels of distance; Said snib is evenly distributed on the said lens barrel; Said snib snaps in said lens barrel is fixed in the said lens barrel ring, and the outside surface of said lens barrel ring has external thread, and said lens barrel ring is contained in the said microscope base through said internal thread and external thread.

Compared with prior art, the lens barrel of the embodiment of the invention passes through the matching and fixing of snib and groove in the lens barrel ring, so camera lens module volume is little; Again, when the lens barrel ring moved in microscope base, the relative position of lens barrel and lens barrel ring can not change, and therefore, can reduce the degree of eccentricity of lens barrel in moving process and between the microscope base.

Description of drawings

Fig. 1 is the synoptic diagram of first embodiment of the invention camera lens module, and the camera lens module comprises lens barrel.

Fig. 2 is the floor map of lens barrel among Fig. 1.

Fig. 3 is the synoptic diagram of second embodiment of the invention camera lens module.

Embodiment

To combine accompanying drawing that the present invention is done further explain below.

See also Fig. 1 and Fig. 2, the camera lens module 10 that first embodiment of the invention provides comprises lens barrel 11, lens barrel ring 12, microscope base 13, first eyeglass 14, second eyeglass 15 and CIS 16.

First eyeglass 14 and second eyeglass 15 are contained in the lens barrel 11.Lens barrel 11 comprises columnar body 120 and edge part 110, and an end of body 120 extends to form edge part 110 to the direction away from body 120 central axis L, and lens barrel 11 is made of plastics.

Edge part 110 has opposite first 111 and second surface 112.The storage tank 114 of the micro electronmechanical driver element 17 of plurality of fixed is set on the first surface 111, is two in the present embodiment.It is the rotational symmetry setting with L that second surface 112 convexes to form 113, two snibs of two snibs 113.Snib 113 has vertical portion 1131 and hook portion 1132, vertical portion 1131 parallel central axis L, and hook portion 1132 is lens barrel 11 dorsad, thereby makes snib 113 roughly present " L " shape.

Lens barrel ring 12 is a drum, and it is centered around the outside of lens barrel 11, lens barrel ring 12 inwall equal intervals, is arranged with four ring-shaped grooves 121 in parallel, and groove 121 is used for holding hook portion 1132, has external thread 122 on the outer wall of lens barrel ring 12.

CIS 16 is fixed on microscope base 13 bottoms, and subject is imaged on the CIS 16 through first eyeglass 14, second eyeglass 15.

Have the internal thread 131 that matches with external thread 122 on the inwall of microscope base 13, lens barrel ring 12 screwed in microscope base 13 through internal thread 131 and cooperating of external thread 122.

Because lens barrel 11 is made of plastics, so snib 113 can produce distortion when receiving external force, when putting in snib 113 in the lens barrel ring 12; The acting force that snib 113 receives lens barrel ring 12 inwardly is compressed; When running into groove 121, thereby snib 113 reinstatements snap in the groove 121, because snib 113 snaps in the groove 121; Therefore, lens barrel 11 relative fixed are in lens barrel ring 13.If the focal length adjustment of camera lens module 10 meets the requirements at this moment, can continue to press down snib 113 and snap in the following groove 121, meet the requirements until the focal length adjustment.

When camera lens module 10 needs focusing, focusing; Micro electronmechanical driver element 17 drives lens barrel ring 12 and in microscope base 13, moves up and down; To change the distance between lens barrel 11 and the CIS 16; So that object only is axial motion clearly influencing imaging on the sensor 16 between lens barrel 11 and the microscope base 13, does not therefore have eccentric problem and produce.

Certainly, the number of snib 113 is not limited to two of present embodiment, can be three, four, five or more a plurality of, and snib 113 equates apart from the distance of optical axis L.

As shown in Figure 3; The structure of the camera lens module 20 that second embodiment of the invention provides and the structure of camera lens module 10 are basic identical; Its difference is: the outer wall of lens barrel 21 lens barrel 21 dorsad forms two snibs 22, and snib 22 equates apart from the distance of lens barrel 21 central axis L and is that rotational symmetry distributes with L.

Snib 22 comprises the vertical portion 222 of the horizontal part 221 of vertical center axis L, parallel central axis L and the hook portion 223 of central axis L dorsad.

In addition, those skilled in the art can also do other variation in spirit of the present invention, and certainly, these all should be included within the present invention's scope required for protection according to the variation that the present invention's spirit is done.

Claims

1. camera lens module; Comprise the tubular lens barrel, be contained in the eyeglass in the said lens barrel and have the microscope base of through hole; The inwall of said through hole is provided with internal thread; It is characterized in that: said camera lens module further comprises a lens barrel ring around said lens barrel, has some ring-shaped grooves that are arranged in parallel on the inwall of said lens barrel ring, the equidistant snib of central shaft that said lens barrel outer wall convexes to form at least two said lens barrels of distance; Said snib is evenly distributed on the said lens barrel; Said snib snaps in said lens barrel is fixed in the said lens barrel ring, and the outside surface of said lens barrel ring has external thread, and said lens barrel ring is contained in the said microscope base through said internal thread and external thread.

2. camera lens module as claimed in claim 1 is characterized in that: said lens barrel comprises a body, and said card is fastened and is arranged on the said body.

3. camera lens module as claimed in claim 1 is characterized in that: said lens barrel comprise a body and from said body one end to the edge part that extends away from said lens barrel central axis direction, said card is fastened and is arranged on the said edge part.

4. camera lens module as claimed in claim 3 is characterized in that: said edge part is provided with micro electronmechanical driver and is used for driving said lens barrel ring and in said microscope base, moves.

5. like each described camera lens module of claim 1-4, it is characterized in that: said camera lens module further comprises a CIS, and said CIS is fixed in the said microscope base, and subject is imaged on the said CIS through eyeglass.