CN201018387Y

CN201018387Y - High-performance speech coil motor

Info

Publication number: CN201018387Y
Application number: CNU2007200010884U
Authority: CN
Inventors: 黄田中
Original assignee: TRICORE Corp
Current assignee: TRICORE Corp
Priority date: 2007-01-22
Filing date: 2007-01-22
Publication date: 2008-02-06
Anticipated expiration: 2017-01-22

Abstract

The utility model relates to a high-performance voice coil motor which comprises a fixed base and a movable base; wherein the interior of the fixed base is provided with a magnetic piece, the movable base is arranged in the fixed base, the movable base is provided with a coil assembly, the coil assembly can act on the magnetic piece when the current is switched on in order to make the movable base and the fixed base produce the relative displacement, the magnetic piece is magnetized into a quadripole, and the position providing the higher density of magnetic force line acts on the coil assembly in order to improve the efficiency; wherein the four sides of the fixed base are respectively provided with the magnetic piece, and the movable base is provided with four coil assemblies corresponding with the magnetic piece. The utility model can improve the utilization efficiency of the magnetic piece magnetic field, reduce the winding number of the coil assembly or the current amperage of the coil assembly and other requirements, or replace the magnetic piece with the stronger magnetic field and other requirements in order to lower the product cost and reduce the waste of electric energy.

Description

High-effect voice coil motor

Technical field

The utility model relates to a kind of motor, relates in particular to a kind of magnetic field of improving magnetic part and utilizes benefit, reduces production costs, and reduces the high-effect voice coil motor of the consumption of electric energy.

Background technology

Voice coil motor is to be arranged to be used for the flexible focusing of adjusting in the camera lens module, by being equipped with of magnetic part and coil groups, utilize to change electric current, and then can reach the effect of controlling focusings such as adjusting upper and lower displacement or reset by the big or small direction of coil groups and the spring extension recovery force characteristic of upper and lower shell fragment.

Existing voice coil motor all is to be provided with several two utmost points formula magnetic parts in holder, and corresponding coil groups is set being provided with on the sliding seat of eyeglass, this coil groups is positioned at contiguous magnetic part part, utilize the magnetic field that coil groups energising produced and the magnetic field interaction of magnetic part, and can produce the actuating force of mobile sliding seat.

Yet, existing voice coil motor is not more had a benefit in the utilization of effective magnetic field direction, see also shown in Figure 8, existing voice coil motor is because of adopting the magnetic part of two utmost point formulas, so the magnetic field of this magnetic part is the S utmost point that is diffused to opposite side by the N utmost point, the parallel part of magnetic line of force comparatively dense, promptly big part of magnetic field intensity is the N utmost point and the surperficial separately centre of the S utmost point; The more sparse place at random of the magnetic line of force, be that the less part of magnetic field intensity is join marginal surface and the contiguous place near the N utmost point and the S utmost point, existing voice coil motor two utmost point formula magnetic part magnetic line of force directions are more mixed and disorderly, and it is more to scatter and disappear, therefore can't effectively utilize the magnetic field of magnetic part, and then the essential increase coil groups winding number of turn, or coil groups electrical current amperage, or change the stronger magnetic part in magnetic field, utilize the not good shortcoming of benefit to remedy magnetic field.

From the above mentioned as can be known, because of existing voice coil motor magnetization direction usability relatively poor, therefore the essential coil groups number of turn, the electrical current of increasing, or change the stronger magnetic part of magnetic, the trouble on so not only causing design and making more can improve whole cost, or make finished product power consumption higher, therefore as a complete unit, poor practicability still has the necessity that is improved.

The utility model content

Technical problem underlying to be solved in the utility model is, overcomes the above-mentioned defective that prior art exists, and a kind of high-effect voice coil motor is provided, and its magnetic field that can improve magnetic part utilizes benefit, reduces production costs, and reduces the consumption of electric energy.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of high-effect voice coil motor, it is characterized in that, mainly comprise a holder and a sliding seat, be provided with magnetic part in this holder, this sliding seat is to be located in the holder, sliding seat is provided with coil groups, during the energising of this coil groups can with the magnetic part effect, make sliding seat and holder generation relative displacement, and this magnetic part is that to magnetize be four utmost points, higher part of density of line of magnetic force and coil groups effect are provided according to this, improve usefulness.

Aforesaid high-effect voice coil motor, wherein holder four sides are respectively equipped with a magnetic part, and the then corresponding magnetic part of this sliding seat also is provided with four coil groups.

Aforesaid high-effect voice coil motor, wherein the sliding seat bottom is provided with shell fragment two times, and these two times shell fragments respectively are provided with a pole plate, and these two times shell fragments and sliding seat coil groups be electrically connect, and can provide the elastic force that resets to sliding seat.

Aforesaid high-effect voice coil motor, wherein the sliding seat upper end is provided with shell fragment, provides the elastic force that resets to sliding seat according to this.

Aforesaid high-effect voice coil motor, wherein holder and sliding seat are to set the position with a upper cover body and a lower cover group.

Aforesaid high-effect voice coil motor, wherein holder is isolated shell fragment under holder and two metals in the framework of bottom configuration one insulation material for insulation.

The beneficial effects of the utility model are, it can improve the benefit of utilizing in magnetic part magnetic field, and can reduce the winding number of turn for coil groups or the demands such as ampere number of circle group, or change the stronger demands such as magnetic part in magnetic field etc., reduce product cost and reduce waste of electric energy.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the perspective exploded view of the high-effect voice coil motor of the utility model.

Fig. 2 is the stereoscopic schematic diagram of the high-effect voice coil motor of the utility model.

Fig. 3 is the magnetic line of force schematic diagram of the high-effect voice coil motor magnetic part of the utility model.

Fig. 4, Fig. 5 analyse and observe the action schematic diagram along A A line segment shown in Figure 2.

Fig. 6, Fig. 7 analyse and observe the action schematic diagram along B B line segment shown in Figure 2.

Fig. 8 is existing voice coil motor two utmost point formula magnetic part magnetic line of force schematic diagrames.

The number in the figure explanation:

11---upper cover body 111---pole

12---lower cover 121---bearing

20---holder 21---accommodation space

22 magnetic part 23---frameworks

The following shell fragment of 24---going up shell fragment 25---

251---pole plate 30---sliding seat

31---coil groups

Embodiment

The utility model relates to a kind of high-effect voice coil motor, sees also Figure 1 and Figure 2, and this high-effect voice coil motor mainly comprises a upper cover body 11, a lower cover 12, a holder 20, and a sliding seat 30, wherein:

This upper cover body 11 is to be corresponding shape with lower cover 12, upper cover body 11 generally is square, 11 4 corners of this upper cover body respectively are extended with a pole 111, and lower cover 12 also generally is square, cooperate upper cover body 11 poles 111 and be provided with bearing 121 in 12 4 corners of lower cover, this pole 111 can be embedded and located in this bearing 121, is installed with according to this in conjunction with upper and

lower cover body

11,12, and with each assembly to be positioned wherein;

This holder 20 is magnetic conductive metal seats that cylinder is arranged in generally being square, contract in slightly and pass fixing for the pole 111 of upper cover body 11 in holder 20 4 corners, holder 20 central authorities have accommodation space 21 and can be installed with for sliding seat 30, holder 20 4 side inwalls are installed with a magnetic part 22 respectively, this magnetic part 22 is that to magnetize be the form of four utmost points, holder 20 bottoms cooperate a framework 23 these magnetic parts 22 of location, and be installed with shell fragment 24 between this holder 20 and the upper cover body 11, and last shell fragment 24 again with sliding seat 30 on intermarginal glue link fixing, holder 20 is in the framework 23 of bottom configuration one insulation material, two disjunct shell fragments 25 down then have been installed with between this framework 23 and the lower cover 12, borrow this framework 23 to isolate holder 20 and twice shell fragments 25 in order to insulation, and following shell fragment 25 links fixing with 30 times intermarginal some glue of sliding seat again, wherein this time shell fragment 25 respectively is provided with a pole plate 251, but and external power supply in order to conducting to sliding seat 30 coil groups 31;

This sliding seat 30 is to establish usefulness for the lens wearer group, adjusts sliding seat 30 upper-lower positions and then has the effect of focusing; This sliding seat 30 can be done relative axial displacement along holder 20 accommodation spaces 21, sliding seat 30 4 sides respectively are provided with a coil groups 31, this coil groups 31 and magnetic part 22 adjacent parallel, and this sliding seat 30 and two times shell fragments 25 are electrically connect, shell fragment 25 transmits the electric currents input to pass through down, make coil groups 31 produce the magnetic field interaction of magnetic field and magnetic part 22, and then can produce an actuating force and promote sliding seat 30 and be axial upper and lower displacement, and the spring extension recovery force characteristic by last shell fragment 24 and two times shell fragments 25, and then can reach and control in the adjustment, the effect that bottom offset or reset etc. is focused.

Outward appearance after the utility model assembling is finished as shown in Figure 2.

See also shown in Figure 3, magnetic part 22 of the present utility model is to magnetize to be four pole type, therefore in the side of magnetic part 22, promptly correspond to the coil part, obviously the magnetic line of force is comparatively concentrated intensive, the utilization that so can improve magnetic part 22 magnetic field intensitys and directivity, make magnetic part 22 and cooperating of coil groups 31 have more benefit, also can reduce coil and twine the number of turn or coil current, falling, and save the energy and use to product cost; Continuous extremely shown in Figure 7 as Fig. 4, the utility model is when action, external power supply is linked to the coil groups 31 of sliding seat 30 by the conduction of shell fragment 25 under two pole plates, 251 warps, then according to Fleming's left hand rule and Ampere's right-handed screw rule, the size of current direction of control coil group 31 can be ordered about the strength that sliding seat 30 is subjected to axially making progress, and then reach control sliding seat 30 shift positions, adjust the effect of focusing; This sliding seat 30 can produce interlock with upper and

lower shell fragment

24,25 when displacement, therefore when coil groups 31 electric currents were closed, sliding seat 30 still can be subjected to the spring extension recovery power of upper and

lower shell fragment

24,25 and reset.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

In sum, the utility model is on structural design, use practicality and cost benefit, it is required to meet industry development fully, and the structure that is disclosed also is to have unprecedented innovation structure, have novelty, creativeness, practicality, the regulation that meets relevant novel patent requirement is so mention application in accordance with the law.

Claims

1. a high-effect voice coil motor is characterized in that, mainly comprises a holder and a sliding seat, is provided with magnetic part in this holder, and this sliding seat is to be located in the holder, and sliding seat is provided with coil groups, and this magnetic part is that to magnetize be four utmost points.

2. high-effect voice coil motor according to claim 1 is characterized in that described holder four sides are respectively equipped with a magnetic part, and the then corresponding magnetic part of this sliding seat also is provided with four coil groups.

3. high-effect voice coil motor according to claim 1 is characterized in that described sliding seat bottom is provided with shell fragment two times, and these two times shell fragments respectively are provided with a pole plate, and these two times shell fragments and sliding seat coil groups be electrically connect, and the elastic force that resets is provided.

4. high-effect voice coil motor according to claim 1 is characterized in that described sliding seat upper end is provided with shell fragment, provides the elastic force that resets to sliding seat according to this.

5. high-effect voice coil motor according to claim 1 is characterized in that described holder and sliding seat are to set the position with a upper cover body and a lower cover group.

6. high-effect voice coil motor according to claim 1 is characterized in that described holder supplies insulation to isolate shell fragment under holder and two metals in the framework of bottom configuration one insulation material.