CN202563146U - Micro lens focusing mechanism - Google Patents

Abstract

The utility model relates to a micro lens focusing mechanism which comprises a shell body, a lens mount and at least one elastic member, wherein the shell body is provided with an upper plate which can form an inner space by combining with a bottom plate; the periphery of the lens mount can be wrapped by a coil; and the elastic member clamps and suspends the lens mount in the inner space, and the lens mount does not contact with the upper plate and the bottom plate so as to enable the elastic member to be free of any pretension force in a state of not being driven. Therefore, compared with a current VCM (voice coil motor) focusing structure, the micro lens focusing mechanism provided by the utility model is more power saving, reduces an oblique angle of the lens during focusing drive, and has a lower element cost.

Description

The micro-lens Focusing mechanism

Technical field

The utility model relates to a kind of micro-lens focusing structure, the micro-lens of particularly a kind of use voice coil motor (Voice Coil Motor, back with VCM the abbreviations) structure of focusing.

Background technology

Because the progress of science and technology; It is considerably little to make that the volume of digital camera contracts, and present mobile phone is also mostly built the function that is equipped with digital camera, and these all give the credit to the modularization and the microminiaturization of pick-up lens; And the automatic focusing Drive Structure of numerous species is arranged in micro-lens; That the most generally be used at present is 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.

Amplify schematic perspective view like Fig. 1 and Fig. 2 for the three-dimensional exploded view and the part thereof of existing VCM focusing structure, VCM focusing structure 10 can be carried a lens group 100 and moved, and this lens group 100 is focused object spare on a Photosensing Units (not shown).Existing VCM focusing structure 10 mainly comprises a shell body 11 and a bottom 12, is provided with a camera lens load carrier 20 in this shell body 11 and focuses mobilely in order to carry this lens group 100, and this camera lens load carrier 20 utilizes up and down that two shell fragments 13 are connected to the inboard apical margin of this shell body 11 and the inner surface of this bottom 12; This camera lens load carrier 20 includes a load bearing seat 21 again; The peripheral coil 22 that coats, these shell body 11 inboard four limits respectively are provided with a magnet 14 respectively, and are fixing through a magnet frame 15; After these coil 22 energisings, generate an electromagnetic field; With this magnet 14 suction and repulsion taking place, promotes this load bearing seat 21 and move up and down, the action of focusing.

As shown in Figure 2; The inner surface of this bottom 12 is stepped in the existing VCM focusing structure 10; The fixed part 13 ' of this time shell fragment 13 is to be connected on these bottom 12 inner surfaces; And the movable part 13 of this time shell fragment 13 " be to be connected the load bearing seat lower surface; and the fixed part 13 ' of this time shell fragment 13 and movable part 13 " between be formed with a height spacing L, this camera lens load carrier 20 is to utilize this time shell fragment 13 movable parts 13 " the elastic force that draws this load bearing seat 21 is pulled to the upper surface near this bottom 12, so this time shell fragment 13 can be drawn back separated into two parts; the difference in height L that wherein draws back makes this time shell fragment 13 produce a precompression; this can use more electric power and drive this camera lens load carrier 20, and the precompression that offsets this time shell fragment 13 could be driven, and is the focus drive current family curve synoptic diagram of structure of existing VCM like Fig. 3; electric current that need about 20-30mA is just understood start, driving force is scolded in this also therefore existing VCM suction that magnetic force that structure need four magnet could strengthen the inductive coil electromagnetic force of focusing.

Be illustrated in figure 4 as existing VCM focusing structure start slope characteristic synoptic diagram again; Because this load bearing seat 21 is that contact is on these bottom 12 surfaces; And when driving the moment that this load carrier 20 is focused, cause drawing elastic force uneven because of the surface of contact of shell fragment up and down and bottom or loam cake is smooth inadequately, make inclination (not necessarily can be the 20-23 branch) that this load bearing seat 21 can generations about 20～23 minutes (1 spends=60 fens) and reduce available resolution; The degree of tilt of for example supposing camera lens is in 20 timesharing; Its resolution can only use 5,000,000 pixels, and after degree of tilt is reduced to 5 fens, just can use the camera lens of 8,000,000 pixel resolutions.

The utility model content

It is a kind of than the more power saving of existing VCM focusing structure that the purpose of the utility model is to provide, and the angle of inclination of reducing camera lens when focusing driving, and it is quicker to focus, and then improves the resolution of focusing, more can reduce the micro-lens focusing structure of element cost.

For reaching above-mentioned purpose, the utility model provides a kind of micro-lens focusing structure, comprising:

One shell body, the upper plate with a central hollow out can be combined to form an inner space with a base plate;

One lens mount, the peripheral coil that coats; And

At least one elastic component; Have movable part and not movable portion; The movable part of this elastic component is connected in this lens mount, and the movable portion of this elastic component then is connected and fixed on upper plate or this base plate, and this lens mount clamping is suspended in the inner space of this shell body and base plate composition; And do not contact, so that when driving condition not, be this lens mount vacant state with this upper plate and this base plate.

Above-mentioned micro-lens focusing structure, wherein the movable part of this elastic component is connected in this lens mount, and the not movable portion of this elastic component is connected in this shell body.

Above-mentioned micro-lens focusing structure, wherein the movable part of this elastic component is connected in the lower edge of this lens mount, and the not movable portion of this elastic component is connected in this base plate.

Above-mentioned micro-lens focusing structure wherein also comprises at least one magnetic part, inhales magnetic on the interior side-wall surface of this shell body, and coil that should lens mount is not contacted this coil.

Above-mentioned micro-lens focusing structure, wherein this elastic component also comprises:

One first elastic component has one and does not movably reach a movable part, and wherein this movable part is connected in the upper limb of this lens mount, and this not movable portion is connected in this upper plate; And

One second elastic component has one and does not movably reach a movable part, and wherein this movable part is connected in the lower edge of this lens mount, and this not movable portion is connected in this base plate.

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in detail, but not as the qualification to the utility model.

Description of drawings

Fig. 1 is the three-dimensional exploded view of existing VCM focusing structure;

Fig. 2 amplifies schematic perspective view for the part of existing VCM focusing structure;

Fig. 3 is the drive current family curve synoptic diagram of existing VCM focusing structure;

Fig. 4 is existing VCM focusing structure start slope characteristic synoptic diagram;

Fig. 5 is the perspective exploded view of the utility model micro-lens focusing structure;

Fig. 6 is the diagrammatic cross-sectional side elevation of the utility model micro-lens focusing structure;

Fig. 7 is the embodiment schematic perspective view of the utility model elastic component;

Fig. 8 is the drive current family curve synoptic diagram of the utility model;

Fig. 9 is the utility model focusing structure start slope characteristic synoptic diagram.

Wherein, Reference numeral

10VCM camera lens focusing structure

100 lens group

11 shell bodies

12 bottoms

13 shell fragments

14 magnet

15 magnet frame

20 camera lens load carriers

21 load bearing seats

22 coils

30 camera lenses focusing structure

31 shell bodies

311 upper plates

32 base plates

322 projections

33 lens mounts

34 coils

35 elastic components

351 first elastic components

352 movable parts

36 magnetic parts

Embodiment

In order further to understand the utility model is to reach technology, means and the effect that predetermined purpose is taked; See also following detailed description and accompanying drawing about the utility model; Believe purpose, characteristic and the characteristics of the utility model; Go deep into and concrete understanding when getting one thus, yet appended accompanying drawing only provides reference and explanation usefulness, is not to be used for the utility model is limited.

See also shown in Figure 5; Perspective exploded view for the utility model micro-lens focusing structure; And Fig. 6 is the diagrammatic cross-sectional side elevation of the utility model micro-lens focusing structure, and the micro-lens focusing structure 30 of the utility model includes a shell body 31, a base plate 32, a lens mount 33, a coil 34 and at least one elastic component.Wherein this shell body 31 has the upper plate 311 of a central hollow out; This upper plate 311 is made of one piece with this shell body 31; Four peripheral regions of this upper plate 311 are stepped to central uplift; And this shell body 31 can form an inner space with this base plate 32 combination backs, and four peripheral regions of this base plate 32 are stepped to concavity.

Wherein the central hollow out of this lens mount 33 can be inserted a lens assembly (load bearing seat 21 as shown in Figure 1 and lens group 100); And in the present embodiment; As shown in Figure 5, this lens mount 33 is to process by a lens group is integrally formed, and the periphery of this lens mount 33 coats this coil 34.

As shown in Figure 5 again; The micro-lens focusing structure of the utility model also comprises at least one magnetic part 36; Inhale magnetic on the interior side-wall surface of this shell body 31; And to coil 34 that should lens mount 33 and not contact, preferably this magnetic part 36 has two, correspondingly respectively is equipped on the both sides of this coil 34 and does not contact this coil 34.

Please consult Fig. 6 and shown in Figure 7 in the lump; Fig. 7 is the embodiment schematic perspective view of the utility model elastic component; Wherein this elastic component 35 has the not movable portion 354 of a movable part 353 and; 353 of the movable parts of this elastic component 35 are connected in this lens mount 33, and the movable portion 354 of this elastic component 35 is connected and fixed on upper plate 311 or this base plate 32, and these lens mount 33 clampings are suspended in the inner space of this shell body 31 and base plate 32 compositions.

Preferably this elastic component 35 includes one first elastic component 351 and one second elastic component 352, and wherein this first elastic component 351 and this second elastic component 352 all have not movable portion and movable part.

The not movable portion of this first elastic component 351 is connected and fixed on this upper plate 311; Movable part is connected in the upper limb of this lens mount 33; And the not movable portion of this first elastic component 351 is connected in the lowest part of upper plate 311 inner surfaces of this shell body 31, makes this lens mount 33 and the highest point of these upper plate 311 inner surfaces be formed with a spacing.

The movable part of this second elastic component 352 is connected in the lower edge of this lens mount 33; And the not movable portion of this second elastic component 352 is connected in the highest point of these base plate 32 inner surfaces; Make and be formed with a spacing between the lowest part of this lens mount 33 and this base plate 32 inner surfaces; And utilize this first elastic component 351 and this camera lens seat 33 of this second elastic component, 352 clampings to be suspended in the inner space of this shell body 31 and this bottom plate 32 compositions; And do not contact with this upper plate 311 and this base plate 32, so that the utility model micro-lens focusing structure should be when driving condition not, this movable part of this elastic component 35 is no any pretension.

Yet the elastic component 35 of the utility model can only make one, as only using first elastic component 351, perhaps only uses second elastic component 352, its structure and with annexation all with aforementioned identical, no longer go to live in the household of one's in-laws on getting married here and chat.

As shown in Figure 8 again, be the drive current family curve synoptic diagram of the utility model, and Fig. 9 is the utility model focusing structure start slope characteristic synoptic diagram.When the utility model utilizes unsettled this lens mount 32 of these elastic component 35 clampings; Because of this elastic component 35 does not have any precompression, so drive current driven when being lower than 10mA, needs the drive current power saving of 20～30mA many compared to existing VCM focusing structure; But and by the focusing structure of Fig. 9 knowledge capital utility model when driving is focused; Because of this elastic component 35 does not have precompression, make the inclination of this lens mount 33 can both maintain below 5 minutes always, compare existing inclination and got well too much above 20 minutes; This is for requiring more and more high-resolution camera lens; It is few more to tilt, and the resolution of camera lens focusing is high more, so the utility model has sizable contribution in fact.

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; Those of ordinary skill in the art work as can 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 (5)

1. a micro-lens focusing structure is characterized in that, comprising:

One shell body, the upper plate with a central hollow out can be combined to form an inner space with a base plate;

One lens mount, the peripheral coil that coats; And

At least one elastic component; Have movable part and not movable portion; The movable part of this elastic component is connected in this lens mount, and the movable portion of this elastic component then is connected and fixed on upper plate or this base plate, and this lens mount clamping is suspended in the inner space of this shell body and base plate composition; And do not contact, so that when driving condition not, be this lens mount vacant state with this upper plate and this base plate.

2. micro-lens focusing structure according to claim 1 it is characterized in that the movable part of this elastic component is connected in this lens mount, and the not movable portion of this elastic component is connected in this shell body.

3. micro-lens focusing structure according to claim 1 it is characterized in that the movable part of this elastic component is connected in the lower edge of this lens mount, and the not movable portion of this elastic component is connected in this base plate.

4. micro-lens according to claim 1 focusing structure is characterized in that, also comprises at least one magnetic part, inhales magnetic on the interior side-wall surface of this shell body, and coil that should lens mount is not contacted this coil.

5. micro-lens focusing structure according to claim 1 is characterized in that this elastic component also comprises:

One first elastic component has one and does not movably reach a movable part, and wherein this movable part is connected in the upper limb of this lens mount, and this not movable portion is connected in this upper plate; And

One second elastic component has one and does not movably reach a movable part, and wherein this movable part is connected in the lower edge of this lens mount, and this not movable portion is connected in this base plate.

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