CN201017092Y

CN201017092Y - Eight-square micro-lens focusing structure

Info

Publication number: CN201017092Y
Application number: CNU2007201414067U
Authority: CN
Inventors: 吴富源
Original assignee: TDK Taiwan Corp
Current assignee: TDK Taiwan Corp
Priority date: 2007-03-09
Filing date: 2007-03-09
Publication date: 2008-02-06
Anticipated expiration: 2017-03-09

Abstract

An octagon miniature lens focusing structure comprises a bearing base for bearing a lens; at least one winding component covering the bearing base; at least one flexible component for connecting the bearing base and the winding component; and at least one magnetic component; after being electrified, the current is conducted to the winding component by the flexible component and the bearing base is displaced with the action force between the winding component and the magnetic component to fulfill the automatic focusing function.

Description

Octagonal micro-lens focusing structure

Technical field

The utility model relates to a kind of octagonal micro-lens focusing structure, particularly drives that camera lens moves and the miniature focusing structure that realizes focus function about a kind of mode with Electromagnetic Drive.

Background technology

Because the progress of science and technology, it is quite little to make that the volume of digital camera contracts, and present mobile phone also mostly is built-in with the function of digital camera, these all give the credit to the modularization and the microminiaturization of pick-up lens, and the automatic focusing drives structure of numerous species is arranged in micro-lens, that the most generally be used at present is voice coil motor (VCM), and volume is little, power consumption is few, activate displacement accurately reaches advantages such as cheap because of it has, and the short distance that is suitable as the automatic focusing of micro-lens drives.

As shown in Figure 1, in general focusing mechanism 10, mainly by comprising that a lens group 11 and an optical sensing subassembly 12 are formed, this lens group 11 can be with the reflected image photoimaging of subject on optical sensing subassembly 12; If the distance that lens group 11 and optical sensing subassembly are 12 is fixing (that is tight shot), then it only can clearly present the 2-3 meter object of distance (Hyper focal Distance) in addition; If desire to have the close-perspective recording function, then must utilize an extra camera lens focusing mechanism to drive the lens group displacement, to change the distance between lens group and the optical sensing subassembly, reach the purpose of focusing (Focus).

And when lens group has optical zoom (Zoom) function, also must cooperate the change of zoom ratio between many arrangements of mirrors group of lens group inside, and produce corresponding displacement, at this moment, described mirror group displacement also needs focusing mechanism is designed among camera lens module.

Existing Focusing mechanism design, it is main that the mechanism design of its moving lens group adopts manual mode, inconvenient in the use; The utility model will improve at above-mentioned shortcoming, with the focusing mode of camera lens by manually changing Electromagnetic Drive into, design simultaneously simplifies the internal structure of an organization, reduce production costs and improve the assembling processing procedure, the phase can be used for mobile phone, mobile computer, PDA with this miniature focusing structure ... on the camera module Deng product.

The utility model content

Technical problem to be solved in the utility model is, provides a kind of and drives camera lens with electromagnetic drive mode and move and realize focus function, and have the miniature focusing structure of advantages such as volume is little, camera lens is big.

In order to realize above-mentioned purpose, the utility model provides octagonal micro-lens focusing structure, comprises a load bearing seat, for carrying one camera lens; At least one coil block is coated on the periphery of load bearing seat; At least one elastic parts links load bearing seat and coil block; And at least one magnet assembly; After energising, electric current conducts on the coil block by elastic parts, produces acting force between this coil block and the magnet assembly and makes load bearing seat produce displacement, reaches the function of automatic focusing.

For enabling further to understand feature of the present utility model and technology contents, see also following about detailed description of the present utility model and accompanying drawing, yet accompanying drawing only provide with reference to and the explanation usefulness, be not to be used for the utility model is limited.

Description of drawings

Fig. 1 is existing camera lens focusing principle schematic;

Fig. 2 is the three-dimensional exploded view of the utility model octagonal micro-lens focusing structure;

Fig. 3 looks synoptic diagram for the master of the utility model octagonal micro-lens focusing structure;

Fig. 4 is the stereographic map of the magnet assembly of the utility model octagonal micro-lens focusing structure;

Fig. 5 is the front view of the elastic parts of the utility model octagonal micro-lens focusing structure;

Fig. 6 is the sectional view of the utility model octagonal micro-lens focusing structure.

Wherein, Reference numeral:

10 cameras

11 lens group

12 optical sensing subassemblies

20 load bearing seats

21 camera lenses

22 is axial

23 through holes

24 thread structures

25 protuberances

30 coil blocks

40 magnet assemblies

41 outer covers

50 elastic partss

51 upper flat plate springs

52 times planar springs

53 bearings

54 circular holes

55 She Zhuanchu

60 loam cakes

70 frameworks

80 photosensory assemblies

Embodiment

As shown in Figure 2, a kind of octagonal micro-lens focusing structure comprises a load bearing seat 20, a loam cake 60, at least one elastic parts 50, four magnet assemblies 40, a coil block 30, a framework 70 and a photosensory assembly 80.

This load bearing seat 20 is for carrying one camera lens 21, and it is one axial 22 that this camera lens 21 has, and it is the axis direction of camera lens 21 in order to optically focused; This load bearing seat 20 is a hollow annular structure and has a through hole 23 in axial 22, can corresponding sealed thread structure 24 in having between through hole 23 and the camera lens 21, so that camera lens 21 is locked in the through hole 23.

This framework 70 is a hollow structure and in the inner edge profile of the axial 22 projections outer margin contour corresponding to load bearing seat 20, when load bearing seat 20 is contained in framework 70, the cooperation of both inside and outside profiles constitutes linear guide mechanism, makes load bearing seat 20 only can carry out linear displacement in framework 70 and can't rotate.

As shown in Figure 3, this coil block 30 is coated on the periphery of load bearing seat 20, and it is octagon, when camera lens 21 rotations are installed on through hole 23, because of meeting produces torsion, so octagonal coil block 30 can limit the angle that camera lens 21 rotation is installed, avoid the inner structure of excessive torsion break load bearing seat 20.

Shown in Fig. 3,4, this magnet assembly 40 is permanent magnets, and wherein four edges and the spacing of periphery that is positioned at coil block 30 is identical, makes camera lens 21 can reach maximum gauge, though and reach the effect that the little camera lens 21 of external form volume increases; These four magnet assemblies 40 have a common outer cover 41, and this outer cover 41 is octagon, belong to metal material, for effective magnetic confining field, make that internal magnetic field is stronger, efficient is better, and prevent that magnetic force from leaking outside.

Shown in Fig. 2,5, this elastic parts 50 is for support bearing seat 20 and make it unsettled, and it has a upper flat plate spring 51 and two times planar springs 52, and this upper flat plate spring 51 links load bearing seat 20 and loam cake 60, and this time planar spring 52 links load bearing seat 20 and framework 70; This upper flat plate spring 51 has four bearings 53, a circular hole 54 and four snake shape places 55, this circular hole 54 is positioned at center and corresponding load bearing seat 20, in order to fixing load bearing seat 20, this bearing 53 is positioned at octagonal four edges, in order to fixed cover 60, this 55 places of being connected and fixed 53, snake shape place and make loam cake 60 be linked upper flat plate spring 51 for absorbing the stressed of the X, the Y that impact, vibrate, fall, Z direction and making mean forced, make upper flat plate spring 51 be difficult for the generation deformation.

As shown in Figure 6, this load bearing seat 20 has a protuberance 25 in addition, be supported in framework 70 bottom surfaces, make down planar spring 52 bendings and produce a downward power, when no matter load bearing seat 20 is to place up, place down or horizontal positioned, it all can be fixed by downward power, makes that its initial position in any direction can not rock, displacement.

During use, this coil block 30 and magnet assembly 40 drives load bearing seats 20 carry out vertically 22 front and rear direction in framework 70 linear displacement motion, electric current is conducted to coil block 30 by following planar spring 52, make coil block 30 generation magnetic fields and have thrust, together drive load bearing seat 20 with magnet assembly 40 and produce displacements, load bearing seat 20 and camera lens 21 are fixed on the focusing position and finish the focusing action.The thrust direction that this coil block 30 is provided is identical with the thrust direction of magnet assembly 40, and the thrust that almost is equal to twice just is provided in fact, significantly improves the usefulness of Electromagnetic Drive load bearing seat 20.

In sum, the design of octagonal coil block 30 can be avoided the inner structure of excessive torsion break load bearing seat 20; The setting of this magnet assembly 40 makes to reach the big effect of the little but camera lens of external form volume 21; The design of this outer cover 41 makes that internal magnetic field is stronger, efficient is better and prevents that magnetic force from leaking outside; The design at this snake shape place 55 makes upper flat plate spring 51 be difficult for producing deformation; The design of this protuberance 25 makes that load bearing seat 20 initial position in any direction can not rock, displacement; The utility model drives load bearing seat 20 in the mode of Electromagnetic Drive and moves with camera lens 21 and reach focus function, and has that the usefulness of driving is good, volume is little, camera lens reaches advantages such as low cost of manufacture greatly.

Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; be familiar with those of ordinary skill in the art and work as and to make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.

Claims

1. octagonal micro-lens focusing structure is characterized in that this structure comprises:

One load bearing seat is for carrying one camera lens;

At least one coil block is coated on the periphery of this load bearing seat;

At least one elastic parts links this load bearing seat and this coil block; And

At least one magnet assembly; After energising, electric current conducts on this coil block by this elastic parts, produces acting force between this coil block and this magnet assembly and makes this load bearing seat produce displacement, realizes the function of focusing automatically.

2. octagonal micro-lens focusing structure according to claim 1 is characterized in that, this elastic parts has at least one upper flat plate spring and at least one planar spring down.

3. octagonal micro-lens focusing structure according to claim 2 is characterized in that this upper flat plate spring has at least one She Zhuanchu.

4. octagonal micro-lens focusing structure according to claim 1 is characterized in that this magnet assembly has an outer cover.