CN103051144A

CN103051144A - Voice coil motor

Info

Publication number: CN103051144A
Application number: CN2012100041869A
Authority: CN
Inventors: 金绍平; 方绍斌; 夏太红; 金士雷; 黄晓敏; 颜石磊
Original assignee: Jinlong Machinery and Electronics Co Ltd
Current assignee: Jinlong Machinery and Electronics Co Ltd
Priority date: 2012-01-09
Filing date: 2012-01-09
Publication date: 2013-04-17
Anticipated expiration: 2032-01-09
Also published as: CN103051144B

Abstract

The invention discloses a voice coil motor. The voice coil motor comprises a shell, and a lens carrier, a magnet assembly, a coil, a magnetic yoke and a magnetic conduction ring which are arranged in the shell, wherein the magnet assembly, the coil, the magnetic yoke and the magnetic conduction ring are all arranged on the periphery of the lens carrier; the magnetic yoke comprises an annular base part and an annular positioning part which is protruded from the top end of the annular base part along a radial direction, the magnet assembly is positioned on the periphery of the annular base part of the magnetic yoke and is positioned right below the annular positioning part of the magnetic yoke; and the magnetic conduction ring is positioned right below the magnet assembly, an annular gap is left between the inner wall of the magnetic conduction ring and the outer wall of the annular base part of the magnetic yoke, and the magnetic conduction ring is completely or partially positioned in the annular gap. The voice coil motor is reasonable and compact in structure, a horizontal magnetic field which is more uniformly distributed is formed in the gap between the annular base part of the magnetic yoke and the magnetic conduction ring below the magnet assembly, and accordingly, the linear drive control of a lens is benefited.

Description

Voice coil motor

Technical field

The present invention relates to a kind of voice coil motor, thereby be a kind ofly to be applied to camera, video camera or to have the voice coil motor of focusing to drive lens moving on the equipment such as mobile phone of camera function specifically.

Background technology

Its drive unit of focusing of traditional camera generally includes stepping motor, gear, the member such as cam and connecting rod forms, a kind of lens construction with stable automatic focusing function is disclosed such as Chinese patent literature CN2938165Y, comprise housing, motor, the first gear, the second gear, camera lens module and elastic parts, described motor is arranged in this housing, described the first gear arranges in this housing and is fixed on the axle center of this motor, described the second gear is arranged in this housing and with this first gear and vertically meshes together, the upper surface of described the second gear has a helical ramp, described camera lens module is arranged in this housing, and camera lens module has a projection that contacts with the helical ramp of the second gear.Wherein relate to motor, two gears, housing, screw inclined plane and projections and camera lens module, parts are numerous, so that the size of camera is larger, transmission is complicated, therefore are difficult to adapt to the trend of camera miniaturization.

Summary of the invention

The purpose of this invention is to provide the voice coil motor that a kind of structure is comparatively reasonable, performance is comparatively good.

The technical scheme that realizes the object of the invention is: a kind of voice coil motor, comprise housing, and being arranged on lens carrier, magnetite assembly, coil, yoke and magnetic guiding loop in the housing, described magnetite assembly, coil, yoke and magnetic guiding loop all are arranged on the lens carrier periphery; It is characterized in that: described yoke comprise the ring-type base portion and from ring-type base portion top radially outstanding ring-type location division, described magnetite assembly is positioned at yoke ring-type base portion periphery, and be positioned at yoke ring-type location division under; Described magnetic guiding loop is positioned under the magnetite assembly, leaves annular gap between described magnetic guiding loop inwall and the yoke ring-type base portion outer wall, all or part of this annular gap that is arranged in of described coil.

In the such scheme, also comprise lower shell fragment, upper shell fragment, upper shell fragment support, pad; Described pad adopts insulating material to make; Described housing comprises base and the loam cake that insulating material is made, and covers the feet that is provided with downward protrusion on described; Described upper shell fragment is arranged on the yoke location division, and described upper shell fragment support is arranged between shell fragment and the upper lid top wall; Described lower shell fragment is arranged on the base, and described pad is arranged between the feet of lower shell fragment and loam cake; Described lens carrier is arranged between shell fragment and the lower shell fragment.

In the such scheme, the neighboring of the neighboring of described magnetite assembly, the neighboring of described magnetic guiding loop and described pad is positioned on the same periphery.

In the such scheme, described magnetite assembly is an annular magnetite.

In the such scheme, the top of described magnetite is the S utmost point, and the bottom is the N utmost point.

The present invention has positive effect: (1) structure of the present invention is comparatively rationally compact, and form the comparatively uniformly horizontal direction magnetic field that distributes in the gap below the magnetite assembly, between yoke ring-type base portion and the magnetic guiding loop, thereby be conducive to the Linear Driving control of lens.

Description of drawings

Fig. 1 is a kind of perspective view of the present invention;

A kind of perspective view of Fig. 2 when to be voice coil motor shown in Figure 1 from another angle observe;

Fig. 3 is a kind of cutaway view of voice coil motor shown in Figure 1;

Fig. 4 is a kind of explosive view of voice coil motor shown in Figure 1.

Be labeled as shown in the accompanying drawing: housing 1, base 11, loam cake 13, feet 131, lens carrier 2, magnetite assembly 3, coil 4, yoke 5, ring-type base portion 51, ring-type location division 52, magnetic guiding loop 6, annular gap 7, lower shell fragment 81, upper shell fragment 82, upper shell fragment support 83, pad 84.

Embodiment

(embodiment 1)

Fig. 1 to Fig. 4 has shown the first embodiment of the present invention, and wherein Fig. 1 is a kind of perspective view of the present invention; A kind of perspective view of Fig. 2 when to be voice coil motor shown in Figure 1 from another angle observe; Fig. 3 is a kind of cutaway view of voice coil motor shown in Figure 1; Fig. 4 is a kind of explosive view of voice coil motor shown in Figure 1.

The present embodiment is a kind of voice coil motor, see Fig. 1 to Fig. 4, comprise housing 1, and be arranged on lens carrier 2, magnetite assembly 3, coil 4, yoke 5 and magnetic guiding loop 6 in the housing 1, described magnetite assembly 3, coil 4, yoke 5 and magnetic guiding loop 6 all are arranged on lens carrier 2 peripheries; It is characterized in that: described yoke 5 comprise ring-type base portion 51 and from ring-type base portion 51 tops radially outstanding ring-type location division 52, described magnetite assembly 3 is positioned at yoke 5 ring-type base portions 51 peripheries, and be positioned at yoke 5 ring-type location divisions 52 under; Described magnetic guiding loop 6 is positioned under the magnetite assembly 3, leaves annular gap 7 between described magnetic guiding loop 6 inwalls and yoke 5 ring-type base portions 51 outer walls, described coil 4 all or part of this annular gaps 7 that are arranged in.

The present embodiment also comprises lower shell fragment 81, upper shell fragment 82, upper shell fragment support 83, pad 84; Described pad 84 adopts insulating material to make; Described housing 1 comprises base 11 and the loam cake 13 that insulating material is made, and described loam cake 13 is provided with the feet 131 of downward protrusion; Described upper shell fragment 82 is arranged on yoke 5 location divisions 52, and described upper shell fragment support 83 is arranged between shell fragment 82 and loam cake 13 roofs; Described lower shell fragment 81 is arranged on the base 11, and described pad 84 is arranged between the feet 131 of lower shell fragment 81 and loam cake 13; Described lens carrier 2 is arranged between shell fragment 82 and the lower shell fragment 81.

The neighboring of the neighboring of the neighboring of described magnetite assembly 3, described magnetic guiding loop 6 and described pad 84 is positioned on the same periphery.

Described magnetite assembly 3 is annular magnetites.

The top of described magnetite is the S utmost point, and the bottom is the N utmost point.

The present embodiment structure is comparatively rationally compact, and forms the comparatively uniformly horizontal direction magnetic field that distributes in the gap below the magnetite assembly, between yoke ring-type base portion and the magnetic guiding loop, thereby is conducive to the Linear Driving control of lens.

Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And these belong to apparent variation or the change that connotation of the present invention extends out and still belong to protection scope of the present invention.

Claims

1. voice coil motor, comprise housing (1), and being arranged on lens carrier (2), magnetite assembly (3), coil (4), yoke (5) and magnetic guiding loop (6) in the housing (1), described magnetite assembly (3), coil (4), yoke (5) and magnetic guiding loop (6) all are arranged on lens carrier (2) periphery; It is characterized in that: the ring-type location division (52) that described yoke (5) comprises ring-type base portion (51) and radially gives prominence to from ring-type base portion (51) top, described magnetite assembly (3) is positioned at yoke (5) ring-type base portion (51) periphery, and be positioned at yoke (5) ring-type location division (52) under; Described magnetic guiding loop (6) is positioned under the magnetite assembly (3), leave annular gap (7) between described magnetic guiding loop (6) inwall and yoke (5) ring-type base portion (51) outer wall, all or part of this annular gap (7) that is arranged in of described coil (4).

2. voice coil motor according to claim 1 is characterized in that: also comprise lower shell fragment (81), upper shell fragment (82), upper shell fragment support (83), pad (84); Described pad (84) adopts insulating material to make; Described housing (1) comprises base (11) and the loam cake (13) that insulating material is made, and described loam cake (13) is provided with the feet (131) of downward protrusion; Described upper shell fragment (82) is arranged on yoke (5) location division (52), and described upper shell fragment support (83) is arranged between shell fragment (82) and loam cake (13) roof; Described lower shell fragment (81) is arranged on the base (11), and described pad (84) is arranged between the feet (131) of lower shell fragment (81) and loam cake (13); Described lens carrier (2) is arranged between shell fragment (82) and the lower shell fragment (81).

3. voice coil motor according to claim 2, it is characterized in that: the neighboring of the neighboring of described magnetite assembly (3), described magnetic guiding loop (6) and the neighboring of described pad (84) are positioned on the same periphery.

4. voice coil motor according to claim 2, it is characterized in that: described magnetite assembly (3) is an annular magnetite.

5. voice coil motor according to claim 1, it is characterized in that: the top of described magnetite is the S utmost point, the bottom is the N utmost point.