CN102710091A

CN102710091A - Voice coil motor

Info

Publication number: CN102710091A
Application number: CN2012100041873A
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: 2012-10-03
Also published as: WO2013104163A1

Abstract

The invention discloses a voice coil motor. The voice coil motor comprises a base, a lower elastic sheet, a lens carrier, a magnetic conducting ring, a magnet assembly, a coil, an upper elastic sheet and an upper cover, wherein the base and the upper cover forms a casing, an accommodating cavity is arranged inside the casing, the upper elastic sheet and the lower elastic sheet are located in the accommodating cavity, the lens carrier is arranged between the upper elastic sheet and the lower elastic sheet, the coil is arranged on the outer periphery of the lens carrier fixedly, the magnet assembly is arranged above the coil and comprises a plurality of magnets which are arranged on the outer periphery of the lens carrier, and a gap is reserved between two adjacent magnets, the magnetic conducting ring comprises circular base portions and a plurality of positioning portions, the positioning portions protrude upwards from the tops of the circular base portions, the circular portions are arranged below the magnets and between the coil and the lens carrier, and each of the positioning portions is located in a gap between two adjacent magnets and is clamped by the two magnets. According to the voice coil motor, the installation and the operation of the magnet assembly is simplified, the positioning is stable and accurate, and the impact resistance capacity is also improved effectively.

Description

A kind of 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 on the equipment such as mobile phone of camera function move the voice coil motor of focusing specifically to drive camera lens.

Background technology

Present voice coil motor, its structure adopt a plurality of permanent magnets of split to form the magnetite assembly more, leave the gap between each permanent magnet; Its fit is mainly through in housing, reserving ccontaining position and fixing through mode such as gluing, owing to required assembly precision is higher, its assembly manipulation had relatively high expectations and comparatively loaded down with trivial details; And its fixed effect is still desirable accidentally, and impact resistance has much room for improvement, the impulsive force that especially transmits from the housing outer peripheral sidewall; Regular meeting causes the magnetite assembly to be shifted, and this displacement makes the repulsion balance no longer between each magnetite, thereby further increases the eccentric degree of lens carrier; Cause bigger departure, even it is scrapped.

Summary of the invention

It is comparatively reasonable to the purpose of this invention is to provide a kind of structure, effectively guarantees the steadiness of magnetite assembly, thereby improves the voice coil motor of shock resistance.

The technical scheme that realizes the object of the invention is: a kind of voice coil motor comprises base, following shell fragment, lens carrier, magnetic guiding loop, magnetite assembly, coil, goes up shell fragment and loam cake; In forming one, said base and loam cake establish the housing of containing cavity; The said shell fragment of going up is arranged in containing cavity with following shell fragment, and said lens carrier is arranged between shell fragment and the following shell fragment; Said coil stationary is arranged on the lens carrier periphery; Said magnetite assembly is arranged on the coil top, and said magnetite assembly comprises a plurality of magnetites that are arranged on the lens carrier periphery, leaves the gap between adjacent two magnetites; Said magnetic guiding loop comprises the ring-type base portion and from a plurality of location divisions protruding upward, ring-type base portion top; Its ring-type base portion is arranged on each magnetite below and between coil and lens carrier, clamps in the gap of its position point between two adjacent magnetites and by these two magnetites.

In the technique scheme, said lens carrier outer wall is provided with the radially positioning boss of protrusion, and said coil is placed on this positioning boss.

In the technique scheme, said coil is provided with in abutting connection with the lens carrier outer wall.

In the technique scheme, the location division of said magnetic guiding loop is upwards and towards the direction diagonally extending away from the lens carrier axis.

In the technique scheme, said going up between shell fragment and the loam cake is provided with the shell fragment support, and the said shell fragment support of going up is provided with and the corresponding to endoporus of last shell fragment peripheral shape, and said upward shell fragment is arranged in the endoporus of shell fragment support.

In the technique scheme, said loam cake is the magnetic conductor of being processed by permeability magnetic material.

In the technique scheme, an end of each magnetite and lens carrier outer wall adjacency is concentric circular-arc, and all the other each end margins are linearity.

The present invention has positive effect: (1) the present invention is provided with a plurality of location divisions of protrusion through the top at the ring-type base portion of magnetic guiding loop, is arranged on the location division in the gap between two adjacent magnetites simultaneously, and is clamped by these two magnetites; Utilize this structure that the magnetite of a plurality of splits is positioned, make the fitting operation of magnetite assembly more simplify, the location is also accurately firm more; Each magnetite in addition,, compresses each other, so when motor integral body outer wall when especially the loam cake sidewall receives impulsive force, under the fixation of magnetic guiding loop, can not be shifted yet, and has effectively improved impact resistance because the location division is fixing jointly by a plurality of magnetites.

Description of drawings

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

Fig. 2 is a kind of perspective view of voice coil motor shown in Figure 1 during from another viewed;

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: base 1, following shell fragment 2, lens carrier 3, positioning boss 31, magnetic guiding loop 4, ring-type base portion 41, location division 42, magnetite assembly 5, magnetite 51, gap 52, coil 6, last shell fragment 7, loam cake 8, last shell fragment support 9, endoporus 91, containing cavity 100.

Embodiment

(embodiment 1)

Fig. 1 to Fig. 4 has shown first kind of embodiment of the present invention, and wherein Fig. 1 is a kind of perspective view of the present invention; Fig. 2 is a kind of perspective view of voice coil motor shown in Figure 1 during from another viewed; 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.

Present embodiment is a kind of voice coil motor, sees Fig. 1 to Fig. 4, comprises base 1, following shell fragment 2, lens carrier 3, magnetic guiding loop 4, magnetite assembly 5, coil 6, goes up shell fragment 7 and loam cake 8; In forming one with loam cake 8, establishes said base 1 housing of containing cavity 100; The said shell fragment 7 of going up is arranged in containing cavity 100 with following shell fragment 2, and said lens carrier 3 is arranged between shell fragment 7 and the following shell fragment 2; Said coil 6 is fixedly installed on lens carrier 3 peripheries; Said magnetite assembly 5 is arranged on coil 6 tops, and said magnetite assembly 5 comprises four magnetites of arranging in the form of a ring 51 that are arranged on lens carrier 3 peripheries, leaves gap 52 between adjacent two magnetites 51; Said magnetic guiding loop 4 comprises ring-type base portion 41 and four location divisions 42 protruding upward from ring-type base portion 41 tops; Its ring-type base portion 41 is arranged on each magnetite 51 below and between coil 6 and lens carrier 3, clamps in the gap 52 of its location division 42 between two adjacent magnetites 51 and by this two magnetites 51.

The basic configuration of said lens carrier 3 is a tubulose, adopts the resinousness material to process, and its outer wall is provided with the radially positioning boss 31 of protrusion, and the bottom of said coil 6 is placed on this positioning boss 31.

Said coil 6 is that just coiling back, in abutting connection with lens carrier 3 outer wall settings and is bonded and fixed on the outer wall of lens carrier 3 through glue through the drum of hot pressing formation.

The location division 42 of said magnetic guiding loop 4 is upwards and towards the direction diagonally extending away from lens carrier 3 axis.

Said going up between shell fragment 7 and the loam cake 8 is provided with shell fragment support 9, and the said shell fragment support 9 of going up is provided with and the corresponding to endoporus 91 of last shell fragment 7 peripheral shape, and said upward shell fragment 7 is arranged in the endoporus 91 of shell fragment support 9.

Said loam cake 8 is magnetic conductors of being processed by permeability magnetic material, for example processes with materials such as iron, cobalt, nickel and alloys thereof.

Each magnetite 51 adopts permanent magnetic materials to process, and its end with lens carrier 3 outer wall adjacency is concentric circular-arc, and all the other each end margins are linearity.

Present embodiment is provided with four location divisions of protrusion through the top at the ring-type base portion of magnetic guiding loop, is arranged on the location division in the gap between two adjacent magnetites simultaneously, and is clamped by these two magnetites; Utilize this structure that the magnetite of four splits is positioned, make the fitting operation of magnetite assembly more simplify, the location is also accurately firm more; Each magnetite in addition,, compresses each other, so when motor integral body outer wall when especially the loam cake sidewall receives impulsive force, under the fixation of magnetic guiding loop, can not be shifted yet, and has effectively improved impact resistance because the location division is fixing jointly by four magnetites.

Obviously, the above embodiment of the present invention only be for clearly the present invention is described and is done for example, and be not to be qualification to execution mode of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that connotation of the present invention extends out and still belong to protection scope of the present invention.

Claims

1. a voice coil motor comprises base (1), following shell fragment (2), lens carrier (3), magnetic guiding loop (4), magnetite assembly (5), coil (6), goes up shell fragment (7) and loam cake (8); In forming one, said base (1) and loam cake (8) establish the housing of containing cavity (100); Said upward shell fragment (7) and following shell fragment (2) are arranged in containing cavity (100), and said lens carrier (3) is arranged between shell fragment (7) and the following shell fragment (2); Said coil (6) is fixedly installed on lens carrier (3) periphery; It is characterized in that: said magnetite assembly (5) is arranged on coil (6) top, and said magnetite assembly (5) comprises a plurality of magnetites (51) that are arranged on lens carrier (3) periphery, leaves gap (52) between adjacent two magnetites (51); Said magnetic guiding loop (4) comprises ring-type base portion (41) and from a plurality of location divisions (42) protruding upward, ring-type base portion (41) top; Its ring-type base portion (41) is arranged on each magnetite (51) below and is positioned between coil (6) and the lens carrier (3), and its location division (42) are arranged in the gap (52) between adjacent two magnetites (51) and are clamped by these two magnetites (51).

2. voice coil motor according to claim 1 is characterized in that: said lens carrier (3) outer wall is provided with the radially positioning boss (31) of protrusion, and said coil (6) is placed on this positioning boss (31).

3. voice coil motor according to claim 1 is characterized in that: said coil (6) is in abutting connection with lens carrier (3) outer wall setting.

4. voice coil motor according to claim 1 is characterized in that: the location division (42) of said magnetic guiding loop (4) is upwards and towards the direction diagonally extending away from lens carrier (3) axis.

5. voice coil motor according to claim 1; It is characterized in that: said going up between shell fragment (7) and the loam cake (8) is provided with shell fragment support (9); The said shell fragment support (9) of going up is provided with and the corresponding to endoporus of last shell fragment (7) peripheral shape (91), and said upward shell fragment (7) is arranged in the endoporus (91) of shell fragment support (9).

6. voice coil motor according to claim 1 is characterized in that: said loam cake (8) is the magnetic conductor of being processed by permeability magnetic material.

7. voice coil motor according to claim 1 is characterized in that: an end of each magnetite (51) and lens carrier (3) outer wall adjacency is concentric circular-arc, and all the other each end margins are linearity.