CN201107449Y

CN201107449Y - Camera lens drive apparatus

Info

Publication number: CN201107449Y
Application number: CNU2007201727004U
Authority: CN
Inventors: 张国际; 刘宝廷
Original assignee: Johnson Electric Shenzhen Co Ltd
Current assignee: Johnson Electric Shenzhen Co Ltd
Priority date: 2007-10-26
Filing date: 2007-10-26
Publication date: 2008-08-27
Anticipated expiration: 2017-10-26

Abstract

The utility model provides a lens-driving device, which comprises a moving part and a fixed part, wherein, the moving part is positioned in the fixed part, and a gap exists between the fixed and moving parts. The moving part comprises a coil and a lens mount, and the coil is fixed on the lens mount. The fixed part comprises a magnet and an iron case, which consists of an outer ring and a yoke, the top of the outer ring is bent inward and extended to form the yoke, which is provided with throughholes corresponding to the lens mount, and the magnet is fixed on the inner side of the outer ring of the iron case. The moving part also includes an iron ring, which abuts against the outer side of the lens mount. The iron ring and the iron case are combined together to form an exciting component. When the moving part of the lens moves relative to the fixed part, in order to reduce friction, gaps are arranged between the iron case and the iron ring and between the magnet and the coil, while the iron ring firmly clings to the lens mount. Consequently, the reduction of the gap between the iron ring and the lens mount means the reduction of the volume of the lens-driving device.

Description

A kind of lens driving apparatus

Technical field

The utility model belongs to the camera technique field, relates in particular to a kind of lens driving apparatus.

Background technology

Continuous development along with science and technology, products such as digital camera, mobile phone camera or Digital Video are more and more higher to the requirement of zoom, focusing in the digital vedio recording field, at the image that guarantees high image quality simultaneously, volume requirement to zoom, focalizer is also more and more stricter, and zoom, focalizer develop towards microminiaturized direction.

Now on the market lens driving apparatus as shown in Figure 1, lens driving apparatus 1 comprises lens bracket 11, iron-clad 12, magnet 13 and coil 14, coil 14 is fixed on the lens bracket 11, and with lens bracket 11 as motion parts.This iron-clad 12 is a circular one-piece construction, its have outer ring, the inner ring in the outer ring and be connected in the top, outer ring and the inner ring top between yoke portion.Magnet 13 is fixed on the inside surface of iron-clad 12 outer rings, and the inner ring of iron-clad 12 is between coil 14 and lens bracket 11.When coil 14 and lens bracket 11 relative iron-clads 12 and magnet 13 motions, in order to prevent friction, must guarantee certain clearance between coil 14 and iron-clad 12 inner rings, between lens bracket 11 and iron-clad 12 inner rings, the volume that has so just limited lens driving apparatus can not further dwindle.

The utility model content

The technical problems to be solved in the utility model provides the less lens driving apparatus of a kind of volume.

In order to solve the problems of the technologies described above, the utility model provides a kind of lens driving apparatus, comprises motion parts and fixed part, and motion parts is positioned at fixed part, and gapped between fixed part and the motion parts.Motion parts comprises coil and lens bracket, and coil stationary is on lens bracket.Fixed part comprises magnet and iron-clad, and iron-clad comprises outer ring and the yoke portion that is bent inwards and extended by the top, outer ring, and yoke portion is provided with and the corresponding through hole of lens bracket, and magnet is fixed on the inboard of iron-clad outer ring.Motion parts also comprises iron hoop, and iron hoop abuts in the outside of lens bracket, and iron hoop and iron-clad are formed excitation component jointly.

Lens bracket is connected as motion parts with iron hoop, coil stationary, and iron-clad is fixedlyed connected as fixed part with magnet, and is gapped between fixed part and the motion parts, and wherein iron hoop and iron-clad form a whole becomes excitation component.When the motion of camera motion portion relatively fixed part, in order to reduce friction, between iron-clad and the iron hoop, leave the gap between magnet and the coil, and iron hoop and lens bracket be close to fix very close to each other.Therefore the gap that reduces between iron hoop and the lens bracket can make the volume-diminished of lens driving apparatus.

Description of drawings

Fig. 1 is the lens driving apparatus structure cross-sectional schematic that prior art provides;

Fig. 2 is the lens driving apparatus STRUCTURE DECOMPOSITION synoptic diagram that the utility model embodiment provides;

Fig. 3 is the schematic top plan view of the lens driving apparatus that provides of the utility model embodiment;

Fig. 4 is the cross-sectional schematic of the lens driving apparatus that provides of the utility model embodiment along A-A line among Fig. 3;

Fig. 5 is the lens driving apparatus motion parts schematic perspective view that the utility model embodiment provides.

Embodiment

In order to make technical matters to be solved of the present utility model, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

In conjunction with Fig. 2, Fig. 3 and Fig. 4, the utility model embodiment lens driving apparatus 2 comprises motion parts 21 and fixed part 22, and motion parts 21 is positioned at fixed part 22, and gapped between motion parts 21 and the fixed part 22.Motion parts 21 comprises lens bracket 211, coil 212, iron hoop 214 and camera lens 213, and camera lens 213 is fixed in the lens bracket 211, and iron hoop 214 and coil 212 all are posted by connecting with lens bracket 211, and iron hoop 214 is between coil 212 and lens bracket 211.Fixed part 22 comprises magnet 221 and iron-clad 222, iron-clad 222 comprises outer ring and the yoke portion that is bent inwards and extended by the top, outer ring, yoke portion is provided with and lens bracket 211 corresponding through holes, and magnet 221 is fixed on the inboard of iron-clad 222 outer rings, and iron hoop 214 and the iron-clad 222 common excitation components of forming.

Lens bracket 211 is fixedlyed connected as motion parts 21 with iron hoop 214, coil 212, and iron-clad 222 is fixedlyed connected as fixed part 22 with magnet 221, and wherein iron hoop 214 forms a whole with iron-clad 222 becomes excitation component.When 22 motions of motion parts 21 relatively fixed parts, in order to reduce friction, between iron-clad 222 and the iron hoop 214, leave the gap between magnet 221 and the coil 212, and that iron hoop 214 and lens bracket 211 are close to is fixing very close to each other, so the gap that reduces between iron hoop 214 and the lens bracket 222 can make the volume-diminished of lens driving apparatus 2.

As shown in Figure 4, among the utility model embodiment, coil 212 is except fixedlying connected with lens bracket 211, can also be posted by connecting with iron hoop 214, like this, iron hoop 214 has further been eliminated the gap between coil 212 and the iron hoop 211 between lens bracket 211 and coil 212, the volume of lens driving apparatus 2 can further be reduced.

In the utility model iron-clad 222 circumferentially can be rounded, rectangle or other shapes, the circular port at iron-clad 222 tops can also be square or other can hold the shape of iron hoop 212.The xsect of iron hoop 212 can also be square or other can hold the shape of lens bracket 211.

As Fig. 2 and shown in Figure 5, lens driving apparatus 2 also comprises pedestal 231, upper spring sheet 232 and lower spring sheet 233, the inner ring of upper spring sheet 232 and lower spring sheet 233 is connected with the two ends lead-in wire of coil 212 respectively, contact chip 234 is all arranged on the outer ring of upper spring sheet 232 and lower spring sheet 233, and upper spring sheet 232 is connected with pedestal 231 by contact chip 234 with lower spring sheet 233.When giving

upper spring sheet

232 and 233 energisings of lower spring sheet, electric current can import in the inner ring by the outer ring of two spring leafs 232,233, thereby gives coil 212 energisings, plays the effect of lead.In addition, when coil 212 energisings drive lens bracket 211 motions, two spring leafs 232,233 deform, produce elastic force, during Spring balanced that electromagnetic force in the coil 212 and two spring leafs 232,233 produce, motion parts 21 will stop, so this device can pass through the Control current size, come the displacement of controlled motion part 21.

As shown in Figure 2, projection 241 is arranged on the pedestal 231 of lens driving apparatus 2, on the lens bracket 211 fluted 242, projection 241 and groove 242 are complementary, and can uniform setting on lens bracket pedestal 231 and lens bracket 211, be symmetrically arranged with two pairs of projectioies 241 and groove 242 in the present embodiment, other arrangement also can be arranged.By projection 241 and groove 242 relative slip couplings, can prevent that lens bracket 211 from rotating, and prevent that lens bracket 211 from tilting.

Last insulating trip 252 is arranged between the upper surface of iron-clad 222 and the upper spring sheet 232, following insulating trip 251 is arranged between the lower surface of iron-clad 222 and the lower spring sheet 233, last insulating trip 252 and following insulating trip 251 can prevent that iron-clad 222 contacts conduction with two spring leafs 232,233 when

upper spring sheet

232 and 233 energisings of lower spring sheet.

As preferred embodiment of the present utility model, fixed part 22 has 4 magnet 221 in the lens driving apparatus 2, and the cross section of iron-clad 222 is the square of chamfer, and 4 magnet 221 are separately fixed at 4 lead angle positions of square iron-clad 222.

The number of magnet 221 can have several or magnet 221 ringwise, and magnet 221 and iron-clad 222 arrange also other arrangements to be arranged, as long as the gap between lens bracket 211 and the iron-clad 222 is reduced, all within protection domain of the present utility model.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1, a kind of lens driving apparatus, comprise motion parts and fixed part, motion parts is positioned at fixed part, and it is gapped between fixed part and the motion parts, motion parts comprises coil and lens bracket, coil stationary is on lens bracket, fixed part comprises magnet and iron-clad, iron-clad comprises outer ring and the yoke portion that is bent inwards and extended by the top, outer ring, yoke portion is provided with and the corresponding through hole of lens bracket, and magnet is fixed on the inboard of iron-clad outer ring, it is characterized in that: described motion parts also comprises iron hoop, iron hoop abuts in the outside of described lens bracket, and described iron hoop and iron-clad are formed excitation component jointly.

2, lens driving apparatus as claimed in claim 1 is characterized in that: described coil also is posted by connecting with described iron hoop, and iron hoop is between described coil and lens bracket.

3, lens driving apparatus as claimed in claim 1, it is characterized in that: described lens driving apparatus also comprises pedestal, upper spring sheet and lower spring sheet, the inner ring of upper spring sheet and lower spring sheet is connected with the two ends lead-in wire of described coil respectively, contact chip is all arranged on the outer ring of upper spring sheet and lower spring sheet, and the upper spring sheet is connected with pedestal by contact chip with the lower spring sheet.

4, lens driving apparatus as claimed in claim 3 is characterized in that: on the described pedestal projection is arranged, and fluted on the described lens bracket, be complementary between projection and the groove.

5, lens driving apparatus as claimed in claim 1 is characterized in that: described fixed part comprises 4 magnet.

6, lens driving apparatus as claimed in claim 5 is characterized in that: described iron-clad xsect is the square of chamfer, and described 4 magnet are separately fixed at 4 chamfering positions of square iron-clad.

7, lens driving apparatus as claimed in claim 1 is characterized in that: the upper surface of described iron-clad is connected with insulating trip, and the lower surface of iron-clad is connected with down insulating trip.