CN101592768A - The camera lens module - Google Patents

Abstract

A kind of camera lens module, comprise the tubular lens barrel, be contained in the eyeglass in the described lens barrel, a lens barrel ring and microscope base with through hole around described lens barrel, described through-hole wall is provided with internal thread, have some ring-shaped grooves that are arranged in parallel on the inwall of described lens barrel ring, equidistant two snibs of the central shaft that described lens barrel outer wall convexes to form at least two described lens barrels of distance, described snib snaps in described lens barrel is fixed in the described lens barrel ring, the outside surface of described lens barrel ring has external thread, and described lens barrel ring is contained in the described microscope base by described internal thread and 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 complexity, and have the disappearance that number of assembling steps is loaded down with trivial details, volume is big and with high costs, also have 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 this kind large volume 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, moves along the optical axis direction of lens barrel thereby drive the lens barrel ring.Elastic construction plays buffering lens barrel suffered power, makes lens barrel rest on default near-end or far-end to reach the initial focal length of adjusting the 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 described lens barrel, a lens barrel ring and microscope base with through hole around described lens barrel, described through-hole wall is provided with internal thread, have some ring-shaped grooves that are arranged in parallel on the inwall of described lens barrel ring, equidistant two snibs of the central shaft that described lens barrel outer wall convexes to form at least two described lens barrels of distance, described snib snaps in described lens barrel is fixed in the described lens barrel ring, the outside surface of described lens barrel ring has external thread, and described lens barrel ring is contained in the described microscope base by described internal thread and external thread.

Compared with prior art, the lens barrel of the embodiment of the invention was fixed in the lens barrel ring by snib and cooperating of groove, so camera lens module volume is little; Again, when the lens barrel ring was mobile 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

Below in conjunction with accompanying drawing the present invention is described in further detail.

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 image sensor 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.

Image sensor 16 is fixed on microscope base 13 bottoms, and subject is imaged on the image sensor 16 by 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 by internal thread 131 and cooperating of external thread 122.

Because lens barrel 11 is made of plastics, so can produce distortion when snib 113 is subjected to external force, when putting in snib 113 in the lens barrel ring 12, the acting force that snib 113 is subjected to 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, meets 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 moves up and down in microscope base 13, to change the distance between lens barrel 11 and the image sensor 16, so that object is clearly influencing imaging on the sensor 16, only be axial motion between lens barrel 11 and the microscope base 13, therefore do not 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, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.

Claims (6)

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

2. camera lens module as claimed in claim 1 is characterized in that: described snib is evenly distributed on the described lens barrel.

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

4. camera lens module as claimed in claim 2 is characterized in that: described lens barrel comprise a body and from described body one end to the edge part that extends away from described lens barrel central axis direction, described card is fastened and is arranged on the described edge part.

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

6. as each described camera lens module of claim 1-5, it is characterized in that: further comprise an image sensor, described image sensor is fixed in the described microscope base, and subject is imaged on the described image sensor by eyeglass.

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