CN2847671Y

CN2847671Y - Flat spring sheet of voice coil motor

Info

Publication number: CN2847671Y
Application number: CN 200520127803
Authority: CN
Inventors: 张文嘉
Original assignee: TDK Taiwan Corp
Current assignee: TDK Taiwan Corp
Priority date: 2005-11-01
Filing date: 2005-11-01
Publication date: 2006-12-13
Anticipated expiration: 2015-11-01

Abstract

The utility model discloses a flat spring sheet of a voice coil motor. Four grooves of which the shapes are the same are bent into even number sections with each other and are arranged on the flat spring sheet. The bending sections are correspondingly parallel to each other, that is, every two bending sections are collocated on a flat plate in a staggered mode. Therefore, movable sections are formed on the inner sides of the grooves, and fixed sections are formed on the outer sides of the grooves. The grooves form four linear elastic bent sections having three segments. When pressed by external force, the flat spring sheet of a voice coil motor moves up and down in a bending mode. When the external force disappears, the flat spring sheet of a voice coil motor returns to the original state. The utility model uses the four linear elastic bent sections having three segments to make the movable sections move and return rapidly, and the problem of lateral inclination is effectively solved.

Description

The flat elastic piece of voice coil motor

Technical field

The utility model relates to a kind of flat elastic piece of voice coil motor, relates in particular to a kind of flat elastic piece that is used in the voice coil motor (VCM), and it is big to have displacement, and elasticity is preferable, can quicken voice coil motor and activate and reset condition.

Background technology

Voice coil motor (VCM) has advantages such as volume is little, power consumption is few, the actuating displacement is accurate and cheap, be suitable as the short distance actuator in the electronic product, as the upper and lower displacement actuator of mobile phone vibrating motor, magnetic head/optical read/write head, the automatic focus actuator of camera or the like.Yet, the actuating of voice coil motor (VCM)/recovery pace of change compared to electronic product easily several milliseconds pace of change be a bit slower, therefore, in the middle of voice coil motor is logical, can add at least one shell fragment and quicken the pace of change that activates/restore.

See also shown in Figure 1, for being used in traditional voice coil motor (VCM) decomposing schematic representation of camera automatic zooming (AF), this voice coil motor includes a loam cake 100, a lower bottom cover 105 and an outside framework 110, the surrounding is established magnet 115 respectively in the outside framework 110, establish screw thread in one lens bracket 120, can screw in and support a camera lens 125, be fixed with two coil 126 on the lens bracket 120, these lens bracket 120 movable four magnet, 115 centers in this outside framework 110, and by these two coil 126 energising generation polarity of the magnetic fields and the 115 mutually red or suctions mutually of this four magnet, driving this lens bracket 120 activates, and this lens bracket 120 is supported on this four magnet, 115 centers by each flat elastic piece 130 up and down, activates quickening.

See also shown in Figure 2ly, be classic flat-plate shell fragment 130 schematic top plan view.This flat elastic piece 130 is to offer two grooves 132 on its plane, and be " ㄇ " word shape, and relatively be laid in each other on this flat elastic piece 130, form an outside fixed part 134 and an inboard movable part 136, this outside fixed part 134 locks in the upper and lower side of this outside framework 110 admittedly, should interiorly survey movable part 136 and then lock in this lens bracket 120 admittedly.

See also shown in Figure 3, for using the voice coil motor actuating state profile of classic flat-plate shell fragment, mutually red or when inhaling mutually when this coil 126 energising magnetic fields and this magnet 115, drive lens bracket 120 stressed actuatings up and down, these flat elastic piece 130 inboard movable parts 5 can borrow these two grooves 132 to form two groups of elastic force kinks, when stressed disappearance, the elastic returning that utilizes this shell fragment kink to be accumulated arrives original state.Because these two grooves 132 are single movable section, so when bestowing external force, strength that must be bigger, and be subject to the external force skew and produce lateral inclination elasticity is restricted, answer speed is also slack-off.

For this reason, the utility model designer is the disappearance that solves the flat elastic piece that uses in the above-mentioned existing voice coil motor, be that the spy concentrates on studies and cooperates the utilization of scientific principle, a kind of new construction of flat elastic piece is proposed, can strengthen the Spring balanced structure of flat elastic piece, effectively solving the problem of lateral inclination, increase answer speed, is to be a utility model reasonable in design.

The utility model content

Main purpose of the present utility model provides a kind of flat elastic piece of voice coil motor, and the Spring balanced structure is arranged, and elasticity is preferable, can effectively solve the problem of lateral inclination, increases answer speed.

For achieving the above object, the flat elastic piece of the utility model voice coil motor includes a flat board, and this flat board has a medium pore, makes this flat elastic piece can be embedded at the movable part of this voice coil motor.Around this medium pore, be provided with one first groove, one second groove, one the 3rd groove and one the 4th groove on this flat board, the two ends of this second groove and the 4th groove lay respectively at the middle position of this first groove and the 3rd groove, and the two ends of this first groove and the 3rd groove lay respectively at the middle position of this second groove and the 4th groove, that is are configured in alternately on this flat board in twos.Wherein, this first groove, one second groove, one the 3rd groove and one the 4th groove shape are identical, and each groove is bent into the even number section, and make each bending section parallel accordingly each other.Form the elastic force kink of four groups of three sections linearities by the groove of said structure, can make flat elastic piece reach the elastic structure balance, elasticity is good, replys effect fast.

Description of drawings

Fig. 1 is traditional voice coil motor decomposing schematic representation;

Fig. 2 is the vertical view of classic flat-plate shell fragment;

Fig. 3 is for using the voice coil motor actuating state profile of classic flat-plate shell fragment;

Fig. 4 is the vertical view of the utility model flat elastic piece; And

Fig. 5 is for using the voice coil motor actuating state profile of the utility model flat elastic piece.

The primary clustering symbol description

100 loam cakes

105 lower bottom covers

110 outside frameworks

115 magnet

120 lens brackets

125 camera lenses

126 coils

130 flat elastic pieces

132 flutes

134 outside fixed parts

136 inboard movable parts

10 flat boards

11 medium pores

12 first grooves

13 second grooves

14 the 3rd grooves

15 the 4th grooves

16 inboard movable parts

17 outside fixed parts

Embodiment

In order to make those of ordinary skill in the art can further understand the utility model is to reach technology, means and the effect that predetermined purpose is taked, see also following about detailed description of the present utility model and accompanying drawing, believe the purpose of this utility model, feature and characteristics, go deep into and concrete understanding when getting one thus, yet, appended graphic reference and the explanation usefulness of only providing not is to be used for the utility model is limited.

See also shown in Figure 4, vertical view for the flat elastic piece of the utility model voice coil motor, flat elastic piece of the present utility model includes a rectangular flat 10, this flat board 10 has a medium pore 11, be positioned on this flat board 10 and around this medium pore 11 and be provided with one first groove 12, one second groove 13, one the 3rd groove 14 and one the 4th groove 15, the two ends of this second groove 13 and the 4th groove 15 lay respectively at the middle position of this first groove 12 and the 3rd groove 14, and the two ends of this first groove 12 and the 3rd groove 14 lay respectively at the middle position of this second groove 13 and the 4th groove 15.

Preferably, this first groove 12, one second groove 13, one the 3rd groove 14 and one the 4th groove, 15 shapes are identical, and be bent to form four three sections linear elastic force kinks each other, and make each bending section parallel accordingly, that is be configured in alternately on this flat board in twos.

Form an inboard movable part 16 on this flat board 10 between medium pore 11 and this first to fourth groove, can lock in this lens bracket 120 admittedly, and this first to fourth trench profile becomes an outside fixed part 17, can lock in admittedly on this outside framework 110, usually this flat elastic piece be installed on this voice coil motor inside can lock in admittedly this lens bracket 120 above or below.

When being subjected to external force, the inboard movable part 16 of this flat board 10 can be borrowed these these four stressed bendings of elastic force kink that first to fourth groove forms and move up and down, when stressed disappearance, the elastic returning that utilizes these four elastic force kinks to be accumulated arrives original state, and since these four elastic force bending parts be distributed in this movable part 16 around, and can put down towards the activity.

The utility model can use even

number groove

12,13,14,15 on dull and stereotyped 10, and make

odd number groove

12,13,14,15 alternatively overlapping, hereat at the inboard movable part 16 of flat board 10 and the elastic force kink of 17 formed four three sections linearities of outside fixed part, and reach the structure of Spring balanced, elasticity is preferable, replys effect fast.

In sum, the utility model utilizes each groove shape identical, and forms three sections linear bending sections each other, and makes each bending section parallel accordingly, makes the structure that reaches Spring balanced, and elasticity is preferable, replys effect fast.Therefore the utility model really can be by above-mentioned disclosed technology, provide a kind of far different, may be able to improve whole use value, do not see publication or public use before its application again in existing design, really meet the important document of novel patent, proposed novel patent application hereby in accordance with the law.

Yet, above-mentioned disclosed graphic, explanation, only be embodiment of the present utility model, all those of ordinary skill in the art work as can do other all improvement according to above-mentioned explanation, and these change in the claim that still belongs to creation spirit of the present utility model and defined.

Claims

1. the flat elastic piece of a voice coil motor, include a flat board, this flat board has a medium pore, around this medium pore, be provided with one first groove, one second groove, one the 3rd groove and one the 4th groove, the two ends of this second groove and the 4th groove lay respectively at the middle position of this first groove and the 3rd groove, and the two ends of this first groove and the 3rd groove lay respectively at the middle position of this second groove and the 4th groove, form four elastic force kinks around distributing.

2. the flat elastic piece of voice coil motor as claimed in claim 1 is characterized in that, this first groove, one second groove, one the 3rd groove and one the 4th groove shape are identical.

3. the flat elastic piece of voice coil motor as claimed in claim 1 is characterized in that, this first groove, one second groove, one the 3rd groove and one the 4th groove are the elastic force kinks that bends to three sections linearities.

4. the flat elastic piece of voice coil motor as claimed in claim 3 is characterized in that, this first groove, one second groove, one the 3rd groove and one the 4th each bending section of groove are parallel accordingly.

5. the flat elastic piece of voice coil motor as claimed in claim 1 is characterized in that, this medium pore is circular.

6. the flat elastic piece of voice coil motor as claimed in claim 1 is characterized in that, inboard movable part, the outside formation fixed part of forming of those grooves.

7. the flat elastic piece of voice coil motor as claimed in claim 6 is characterized in that, when this movable part is subjected to external force, can borrows the elastic bending of this elastic force kink and produces and move up and down reinstatement when external force disappears.