CN204741355U

CN204741355U - FPC coil that VCM motor used

Info

Publication number: CN204741355U
Application number: CN201520389771.4U
Authority: CN
Inventors: 孙士卫; 黄庆林; 吕文涛; 秦培松
Original assignee: DALIAN JIXING ELECTRONICS Co Ltd
Current assignee: DALIAN JIXING ELECTRONICS Co Ltd
Priority date: 2015-06-08
Filing date: 2015-06-08
Publication date: 2015-11-04
Anticipated expiration: 2025-06-08

Abstract

The utility model provides a FPC coil that VCM motor used, belong to the electromagnetism field, the fine thinization degree of coil for VCM motor among the solution prior art is low, it is comparatively complicated to lay wire, it is accurate inadequately, it is stable inadequately through the electric current, the technical problem that the controllable degree is low, the technical essential is including at least two -layer FPC planar layer, the FPC conductting layer is arranged in between the adjacent two -layer FPC planar layer, the FPC conductting layer is established ties the FPC planar layer and is switched on, the utility model discloses a make the thickness of this FPC coil be less than the copper coil far away, the fine thinization degree of product has been promoted.

Description

The FPC coil that a kind of VCM motor uses

Technical field

The utility model relates to a kind of coil of motor, particularly relates to the FPC coil that a kind of VCM motor uses.

Background technology

VCM (Voice Coil Motor), the voice coil motor inside electronics is the one of motor because principle and loud speaker similar, so be called voice coil motor, there is high frequency sound, high-precision feature.Its cardinal principle is in a permanent-magnetic field, by changing the size of the direct current of motor interior loop, carrys out the stretch position of control spring sheet, thus drive moves up and down.Mobile phone camera uses VCM to realize automatic focusing function widely, can the position of adjustable lens by VCM, presents image clearly.

The VCM structure slightly difference of different vendor, roughly divide several large parts as follows:

Shield Case: shell

Frame: support

F.Spacer: front pad, for insulation

F.Spring: front reed, for carrying carrier, trimming moment

Yoke: for fixing other assemblies, magnetic conduction

Magnet: magnetite, produces permanent-magnetic field

Coil: coil, energising produces driving moment

Carrier: carrier, for carrying camera lens

B.Spacer: rear pad, for insulation

B.Spring: rear spring, for carrying carrier, trimming moment

Base: base, for fixed part.

VCM motor industry is through 02, and after the low-key exploitation of 03 two years, in 05 year along with SHARP, SONY, the lofty tone of Samsung is got involved and enters substantial developing stage.

But the coil of existing VCM motor, use copper coil, thickness is at more than 2mm, and slimming degree is low; Meanwhile, wiring is comparatively complicated, accurate not; Stable not by electric current, controllable degree is low.

Utility model content

The utility model provides the FPC coil that a kind of VCM motor uses, low with the coil slimming degree solving VCM motor in prior art, and wiring is comparatively complicated, accurate not, the technical problem stable not by electric current, controllable degree is low.

To achieve these goals, the technical solution adopted in the utility model is: the FPC coil that a kind of VCM motor uses, and comprise at least two-layer FPC plane layer, FPC conductting layer is placed between the FPC plane layer of adjacent two layers, and FPC conductting layer is by FPC plane layer series connection conducting.

Further, described FPC plane layer forms primarily of FPC coiling, two end points portions of this coiling have via, described FPC conductting layer forms primarily of FPC straightway, two end points portions of this FPC straightway also have via, a via of described FPC straightway is connected with the via of a FPC plane layer, and another via of this FPC straightway is connected with the via of another FPC plane layer, by this two-layer FPC plane layer series connection conducting.

Further, each layer FPC plane layer carries out conducting by holing and sinking copper-plated mode.

Further, each FPC plane layer and FPC conductting layer press together to form FPC coil.

Further, each FPC plane layer and each FPC conductting layer are all arranged on loading plate.

Further, there is following functional relation between the number of plies of coiling electromagnetic force and FPC plane layer:

F＝NBiL

Wherein:

F---coiling electromagnetic force

N---the number of plies of FPC plane layer

B---air gap flux density

I---coil passes through electric current

L---the length of arrangement wire of every layer of FPC plane layer.

Beneficial effect: the utility model uses the FPC plane layer of series connection conducting to be pressed into FPC coil to substitute traditional copper coil, makes the thickness of this FPC coil well below copper coil, improves the slimming degree of product; Pressing FPC plane layer forms FPC coil, and make wiring more carefully and neatly done, accurate, place on line and live width line-spacing tolerance can reach ± 0.01mm, and use FPC coil, makes the electric current that passes through more stable, easily controls; FPC coil line has PI to carry itself and carrier to be assembled be more prone to.

Accompanying drawing explanation

Fig. 1 is the FPC plane layer in embodiment 1;

Fig. 2 is the FPC conductting layer in embodiment 1;

Fig. 3 is the 2nd FPC plane layer in embodiment 1;

Fig. 4 is the 2nd FPC conductting layer in embodiment 1;

Fig. 5 is the 3rd FPC plane layer in embodiment 1;

Fig. 6 is the assembling schematic diagram of the FPC coil that the VCM motor in embodiment 1 uses.

Wherein: 1.FPC plane layer, 11.FPC coiling, 2.FPC conductting layer, 21.FPC straightway, 3. loading plate, P1_1. via, P1_2. via, C1_1. via, C1_2. via, P2_1. via, P2_2. via, C2_1. via, C2_2. via, P3_1. via, P3_2. via.

Embodiment

In order to set forth the invention further, below in conjunction with drawings and the specific embodiments, the utility model is further illustrated.

Embodiment one:

As shown in figures 1 to 6, the FPC coil that a kind of VCM motor uses, comprise at least two-layer FPC plane layer 1, FPC conductting layer 2 is placed between the FPC plane layer 1 of adjacent two layers, FPC plane layer 1 is connected conducting by FPC conductting layer 2, and each via is arranged by holing and sinking copper-plated mode, makes each layer FPC plane layer 1 can carry out conducting by holing and sinking copper-plated mode, thus each FPC plane layer 1 presses together to form FPC coil with FPC conductting layer 2, this pressing uses hot pressing mode.

Concrete, its realization series connection conducting structure of the FPC coil that VCM motor uses is, described FPC plane layer 1 forms primarily of FPC coiling 11, two end points portions of this coiling have via, described FPC conductting layer 2 forms primarily of FPC straightway, two end points portions of this FPC straightway also have via, because FPC conductting layer 2 is placed between two FPC plane layers 1, FPC straightway via is connected with the via of a FPC plane layer 1, another via of this FPC straightway is connected with the via of another FPC plane layer 1, the FPC plane layer 1 this being positioned at these FPC conductting layer 2 both sides is connected conducting.

In the present embodiment, setting FPC plane layer is 3 layers, be respectively a FPC plane layer, the 2nd FPC plane layer and the 3rd FPC plane layer, wherein the via of a FPC plane layer is respectively via P1_1 and via P1_2, the via of the 2nd FPC plane layer is respectively via P2_1 and via P2_2, and the via of the 3rd FPC plane layer is respectively via P3_1 and via P3_2.

Setting FPC conductting layer is two-layer, be respectively a FPC conductting layer, the 2nd FPC conductting layer, wherein, the via of the one FPC conductting layer is respectively via C1_1 and via C1_2, and the via of the 2nd FPC conductting layer is respectively via C2_1 and via C2_2.

Wherein, via P1_2 and via C1_2 conducting, via C1_1 and via P2_1 conducting; Via P2_2 and via C2_2 conducting, via C2_1 and via P3_1 conducting.

Voice coil motor is mainly used in optical lens, the size of FPC is determined according to camera lens different size, live width, the line-spacing >=0.03mm of the every bar circuit of FPC, FPC size can calculate FPC winding turns according to live width, line-spacing when fixing, such as: FPC is of a size of 10mm*10mm, middle reserved diameter d=5mm circle position, then wiring width is 5mm, wiring live width line-spacing is 0.03mm, then coil number=5/0.03/2=83 circle.

The FPC coil of the VCM motor use of the present embodiment, each FPC plane layer and each FPC conductting layer are all arranged on loading plate, and there is following functional relation between the number of plies of coiling electromagnetic force and FPC plane layer:

F＝NBiL

Wherein:

F---coiling electromagnetic force

N---the number of plies of FPC plane layer

B---air gap flux density

I---coil passes through electric current

L---the length of arrangement wire of every layer of FPC plane layer.

Embodiment two:

It is identical with the technical scheme of embodiment 1, and difference is: in the present embodiment, and setting FPC plane layer is 2 layers, is a FPC plane layer, and setting FPC conductting layer is one deck, is a FPC conductting layer (not shown).

Embodiment three:

It is identical with the technical scheme of embodiment 1, and difference is: in the present embodiment, and setting FPC plane layer is 10 layers, and setting FPC conductting layer is 9 layers (not shown).

The above; be only the utility model preferably embodiment; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, all should be encompassed within protection range of the present utility model.

Claims

1. a FPC coil for VCM motor use, it is characterized in that, comprise at least two-layer FPC plane layer, FPC conductting layer is placed between the FPC plane layer of adjacent two layers, and FPC conductting layer is by FPC plane layer series connection conducting.

2. the FPC coil of a kind of VCM motor use as claimed in claim 1, it is characterized in that, described FPC plane layer forms primarily of FPC coiling, two end points portions of this coiling have via, described FPC conductting layer forms primarily of FPC straightway, two end points portions of this FPC straightway also have via, a via of described FPC straightway is connected with the via of a FPC plane layer, and another via of this FPC straightway is connected with the via of another FPC plane layer, by this two-layer FPC plane layer series connection conducting.

3. the FPC coil that uses of a kind of VCM motor as claimed in claim 1 or 2, is characterized in that, each layer FPC plane layer carries out conducting by holing and sinking copper-plated mode.

4. the FPC coil of a kind of VCM motor use as claimed in claim 3, it is characterized in that, each FPC plane layer and FPC conductting layer press together to form FPC coil.

5. the FPC coil of a kind of VCM motor use as claimed in claim 4, it is characterized in that, each FPC plane layer and each FPC conductting layer are all arranged on loading plate.