CN201489175U

CN201489175U - Lends drive device

Info

Publication number: CN201489175U
Application number: CN2009201348401U
Authority: CN
Inventors: 董乐平
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Acoustic Technologies Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Technologies Holdings Changzhou Co Ltd; AAC Technologies Holdings Suzhou Co Ltd
Priority date: 2009-08-17
Filing date: 2009-08-17
Publication date: 2010-05-26
Anticipated expiration: 2019-08-17

Abstract

The utility model discloses a lens drive device, comprising a lens module, a shell, a coil and a magnet, wherein the shell is used for containing the lens module, the coil is arranged in the shell and is fixedly retained on the lens module, and the magnet is placed in the shell and has a certain interval with the coil. The lens drive device further comprises a first magnetizer, a second magnetizer and an elastic member, wherein the first magnetizer is fixedly retained on the lens module and is connected with the coil, the second magnetizer abuts against the shell and is connected with the magnet, the elastic member is fixedly retained on the second magnetizer and abuts against the lens module, the first magnetizer, the coil and the lens module are closely matched without gaps, and the second magnetizer and the magnet are closely matched without gaps. The lens drive device has reasonable structure design, is beneficial to miniaturizing products and can improve the product performance.

Description

Lens driving apparatus

[technical field]

The utility model relates to a kind of drive unit, relates in particular to a kind of lens driving apparatus.

[background technology]

Along with the development of camera technique, the camera lens module is widely used in the camera head of various uses, and combining of camera lens module and various portable electron devices such as mobile phone, video camera, computer etc. obtains consumer's favor especially.

For taking the image of different amplification, the camera lens module requires to have zoom function usually, and desire realizes that zoom function need drive eyeglass in the camera lens module so that the distance between the eyeglass changes.

The lens driving apparatus 100 ' of correlation technique, receiving space (not label), an end that it comprises camera lens module 1 ', accommodate the housing 2 ' of camera lens module 1 ', is formed jointly by camera lens module 1 ' and housing 2 ' are connected in housing 2 ', the elastomeric element 3 ' that the other end links to each other with camera lens module 1 ', place receiving space interior and be connected in coil 4 ' on the camera lens module 1 ', place receiving space interior magnetic bowl 5 ' and the magnet 6 ' that links to each other with magnetic bowl 5 '.Wherein, magnetic bowl 5 ' comprises the first wall portion 51 ' near housing 2 ' inside surface, from first wall portion 51 ' the vertically extending connecting portion 52 ' and the second wall portion 53 ' of extending from the end of connecting portion 52 ', the described first wall portion 51 ' and the second wall portion 53 ' be arranged in parallel, described magnet 6 ' links to each other with first wall portion 51 ', the space (not label) that voice coil loudspeaker voice coil 4 ' places the magnet 6 ' and the second wall portion 53 ' to form, make in the lens driving apparatus 100 ' of dependency structure, be formed with first gap 7 ' between voice coil loudspeaker voice coil 4 ' and magnet 6 ', voice coil loudspeaker voice coil 4 ' is formed with second gap 8 ' with the second wall portion 52 ' of magnetic bowl 5 ', be formed with third space 9 ' between the second wall portion 52 ' and camera lens module 1 '.

The dependency structure lens driving apparatus because first, second, third gap 7 ', 8 ', 9 ' existence are unfavorable for that it develops to miniaturization, also causes the size of magnet 6 ' very thin, magnetic is not enough in addition indirectly.

Therefore be necessary the lens driving apparatus of dependency structure is improved in fact.

[utility model content]

The purpose of this utility model is to provide the lens driving apparatus of a kind of function admirable, miniaturization.

The purpose of this utility model is achieved in that a kind of lens driving apparatus, it comprises the camera lens module, accommodate the housing of camera lens module, place in the housing and be immobilizated in coil on the camera lens module, place in the housing and with coil across a certain distance magnet mutually, wherein, described lens driving apparatus also comprises first magnetic conductor that is immobilizated on the camera lens module and links to each other with coil, second magnetic conductor that is connected on the housing and links to each other and being immobilizated on second magnetic conductor and the elastomeric element of support lens module with magnet, be the no gap that closely cooperates between first magnetic conductor and coil and the camera lens module, be the no gap that closely cooperates between second magnetic conductor and the magnet.

Preferably, described camera lens module is provided with some holding parts, and first magnetic conductor is provided with the some buttons that are fastened in described holding part and holds mouth.

Preferably, described first magnetic conductor comprises respectively first wall portion that links to each other with coil with the camera lens module and first extension that extends from first wall portion.

Preferably, described second magnetic conductor comprises the second wall portion and second extension that extends from the second wall portion.

Preferably, described housing comprises upper cover body and the lower cover that fastens with upper cover body.

Preferably, the described first magnetic conductor axial length is longer than the axial length of coil, and correspondingly, the second magnetic conductor axial length is longer than the axial length of magnet.

Preferably, described lens driving apparatus also is provided with the packoff that is contained in the lower cover.

Compared with prior art, lens driving apparatus reasonable in design of the present utility model, the miniaturization that helps product also can be enhanced product performance.

[description of drawings]

Fig. 1 is the cut-open view of the lens driving apparatus of correlation technique;

Fig. 2 is the three-dimensional exploded view of the utility model lens driving apparatus;

Fig. 3 is the stereographic map of the utility model lens driving apparatus;

Fig. 4 is the cut-open view along the VI-VI line shown in Figure 3.

[embodiment]

Describe the concrete structure of the utility model lens driving apparatus in detail below in conjunction with accompanying drawing.

Please join Fig. 2-Fig. 4, the utility model lens driving apparatus 100, it comprises camera lens module 1, accommodate the housing 2 of camera lens module 1, place in the housing 2 and be immobilizated in coil 3 on the camera lens module 1, place in the housing 2 and with coil 3 across a certain distance magnet 4 mutually, wherein, described lens driving apparatus 100 also comprises first magnetic conductor 5 that is immobilizated on the camera lens module 1 and links to each other with coil 3, is connected on the housing 2 and second magnetic conductor 6 that links to each other with magnet 4, is immobilizated on second magnetic conductor 6 and the elastomeric element 7 of support lens module 1 and be contained in packoff 8 in the housing 2.

Camera lens module 1 is cylindric, can assemble some camera lenses (not shown) in it, and it comprises lens barrel portion 11 and the teats 12 that extend from lens barrel portion 11 ends.This camera lens module 1 can be along optical axis direction A, the B to-and-fro movement of camera lens.The lens barrel portion 11 of camera lens module 1 is provided with some holding parts 13.

First magnetic conductor 5 is a hollow cylindrical, it comprises respectively first wall portion 51 that links to each other with coil 3 with camera lens module 1 and first extension 52 that extends from first wall portion 51, described first wall portion 51 is provided with the some buttons that are fastened in described holding part 13 and holds mouthfuls 511, and this first extension 52 can be inserted in the teat 12 of camera lens module 1.

The lower cover 21 that housing 2 is provided with upper cover body 22 and fastens with upper cover body 22.

The periphery of first magnetic conductor 5 is wound with coil 3, the shape of coil 3 is the drums that form through hot pressing for behind the spiral, be the no gap that closely cooperates between coil 3 of the present utility model and first magnetic conductor 5 and the camera lens module 1, but the elliptical structure space, the structural design that helps lens driving apparatus 100 gets smaller and more exquisite.

Second magnetic conductor 6 is held between upper cover body 22 and the lower cover 21, and it comprises the second wall portion 61 and second extension 62 that extends from the second wall portion 61, and described magnet 4 is connected to the second wall portion 61 and second extension 62 simultaneously.Described second magnetic conductor 6 is made by materials such as the material with magnetic conduction character such as iron, cobalt, nickel and alloys thereof, is provided with in the present embodiment to be the square gabarit that the center connects.Second magnetic conductor 6 gets final product magnetic conduction, can be used as simultaneously framework again, miscellaneous part can carry out chimeric assembling for the basis by second magnetic conductor 6, saved as parts such as frameworks, further dwindled the size of lens driving apparatus 100, simplified mounting process, help product is carried out the large-scale production of standard technology, in addition, second magnetic conductor 6 also has the effect of shielding electromagnetism, prevents that the motion of camera lens module 1 is subjected to the influence of external magnetic field effect.

Magnet 4 is divided into 4, and it is provided with the 4a of incline portion, and the second wall portion 61 of this 4a of incline portion and second magnetic conductor 6 fits tightly and is solid-located.Magnet 4 is processed into the arcwall face 4b of indent near a side of coils 3, this shape of magnet 4 make its with camera lens module 1, first magnetic conductor 5 and coil 3 between form concentric setting, can improve the electromagnetic intensity of coil 3, the equilibrium of assurance magnetic field intensity.Be the no gap that closely cooperates between second magnetic conductor 6 and the magnet 4.

As shown in Figure 4, the axial length L 2 that first magnetic conductor, 5 axial length L 1 are longer than coil 3, correspondingly, the axial length L 4 that second magnetic conductor, 6 axial length L 3 are longer than magnet 4.Therefore leakage flux can be reduced, the amount of movement of lens assembly 1 can be improved from the magnetic circuit that constitutes between magnet 4 and the coil 3.

Elastomeric element 7 is provided with first elastomeric element 71 and second elastomeric element 72, and wherein first elastomeric element 71 is provided with first outer ring 711 that is immobilizated on 6 one lateral margins of second magnetic conductor, is immobilizated in first inner ring 712 and bending first connecting portion 713 that is connected first outer ring 711 and first inner ring 712 on 11 ones of the lens barrels; Second elastomeric element 72 is provided with second outer ring 721 that is immobilizated on second magnetic conductor, 6 another lateral margins, be immobilizated in second inner ring 722 on the teat 12 with bending second connecting portion 723 that is connected second outer ring 721, second inner ring 722 with from second outer ring, 721 vertically extending two contact sites 724.The existence of the contact site 724 of second elastomeric element 72 can be introduced external power source in the lens driving apparatus 100.

Packoff 8 piece shape shapes, it is contained in the lower cover 21.

Lens driving apparatus of the present utility model, after coil 3 energisings, in the closed magnetic circuit scope of being formed by second magnetic conductor 6, magnet 7, first magnetic conductor 5, generation is along the electromagnetic force of the optical axis direction of camera lens, the acting force that this electromagnetic force overcomes elastomeric element makes camera lens module 1 move along the optical axis direction of camera lens, just can adjust the shift position of camera lens module by the size of current of adjusting energising.

Lens driving apparatus 100 of the present utility model, be the no gap that closely cooperates between coil 3 of the present utility model and first magnetic conductor 5 and the camera lens module 1, be the no gap that closely cooperates between second magnetic conductor 6 and the magnet 4, but the elliptical structure space, the miniaturization that helps product also can be enhanced product performance.

The above only is a better embodiment of the present utility model; protection domain of the present utility model does not exceed with above-mentioned embodiment; as long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection domain of putting down in writing in claims.

Claims

1. lens driving apparatus, it comprises the camera lens module, accommodate the housing of camera lens module, place in the housing and be immobilizated in coil on the camera lens module, place in the housing and with coil across a certain distance magnet mutually, it is characterized in that: described lens driving apparatus also comprises first magnetic conductor that is immobilizated on the camera lens module and links to each other with coil, second magnetic conductor that is connected on the housing and links to each other and being immobilizated on second magnetic conductor and the elastomeric element of support lens module with magnet, be the no gap that closely cooperates between first magnetic conductor and coil and the camera lens module, be the no gap that closely cooperates between second magnetic conductor and the magnet.

2. lens driving apparatus according to claim 1 is characterized in that: described camera lens module is provided with some holding parts, and first magnetic conductor is provided with the some buttons that are fastened in described holding part and holds mouth.

3. lens driving apparatus according to claim 2 is characterized in that: described first magnetic conductor comprises respectively first wall portion that links to each other with coil with the camera lens module and first extension that extends from first wall portion.

4. lens driving apparatus according to claim 3 is characterized in that: described second magnetic conductor comprises the second wall portion and second extension that extends from the second wall portion.

5. lens driving apparatus according to claim 4 is characterized in that: described housing comprises upper cover body and the lower cover that fastens with upper cover body.

6. lens driving apparatus according to claim 5 is characterized in that: the described first magnetic conductor axial length is longer than the axial length of coil, and correspondingly, the second magnetic conductor axial length is longer than the axial length of magnet.

7. lens driving apparatus according to claim 6 is characterized in that: described lens driving apparatus also is provided with the packoff that is contained in the lower cover.