CN103176260B

CN103176260B - Driving means

Info

Publication number: CN103176260B
Application number: CN201110437276.2A
Authority: CN
Inventors: 吴松青
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2011-12-23
Filing date: 2011-12-23
Publication date: 2016-08-31
Anticipated expiration: 2031-12-23
Also published as: CN103176260A

Abstract

A kind of driving means, is used for driving camera lens module to move, and driving means includes: a fixed mount, has receiving space and opening；One movable piece, is arranged in receiving space, and has through hole；One Magnet, is fixed on fixed mount；One Magnet magnetic piece, on fixing movable piece, on the predeterminated position that movable piece is fixed in fixed mount by the active force between Magnet and magnetic piece；One supporting body, matches for housing movable piece with fixed mount；One guide rod, is located in the through hole of movable piece, and two ends are separately fixed on fixed mount and supporting body；One contact bar, is fixed on movable piece；And a piezoelectric unit, in being fixed on opening and abutting contact bar, piezoelectric unit is used for deforming upon producing frictional force drive movable piece between bar move in receiving space along guide rod with contact.

Description

Driving means

Technical field

The present invention relates to a kind of driving means, particularly relate to a kind of driving means using piezoelectric unit.

Background technology

Digital camera or have on the mobile phone of shoot function and be equipped with at least one camera lens module, and this camera lens The function of module for driving optical glass or optical glass group to move along optical axis, with reach auto-focusing and/ Or the function of zoom.

The one of the moving method of optical glass group is piezo-electric motor, and it has piezoelectric unit and and piezoelectric unit The contact bar contacted, so that the movable piece accommodating camera lens module has an original state (piezoelectricity When unit does not deform upon, movable piece can be fixed without being moved, to prevent the damage of camera lens module Wound), mat firmly two Magnet go to attract the contact bar being fixed on movable piece to realize, and Magnet is positioned at optical frames The two ends in sheet group optical axis path, piezoelectric unit is then between two Magnet, and piezoelectric unit deforms upon, Piezoelectric element drives movable piece to move up and down with the frictional force contacted between bar and realizes focusing or zoom function.

Magnet is used to be arranged on the structure (attracting mode the most up and down) at two ends, optical glass group optical axis path, Necessarily improve the height of driving means；Further, since must have active force between contact bar and Magnet, Therefore, contact bar must select the material that can attract each other, such as, metal or magnetic material with Magnet, from And make the selection of contact bar be restricted.

Summary of the invention

In view of this, it is necessary to the driving means that a kind of height is less is provided.

A kind of driving means, is used for driving camera lens module to move, and described camera lens module has optical axis, described Driving means includes: a fixed mount, has the receiving space of central shaft and optical axis coincidence, described fixed mount On there is opening and the first groove；One movable piece, is arranged in described receiving space, and described movable piece has There are the through hole of the parallel described optical axis of central shaft and second groove corresponding with the first groove；One magnetic piece, Gu Being scheduled on described movable piece, described magnetic piece is contained in the second groove of described movable piece；One Magnet, On fixing described fixed mount, described Magnet is contained in the first groove on described fixed mount, described Magnet And described movable piece is fixed on the predeterminated position in described fixed mount by the active force between magnetic piece； One supporting body, matches for housing described movable piece with described fixed mount；One guide rod, is located in described In the through hole of movable piece, and two ends are separately fixed on described fixed mount and supporting body；One contact bar, Gu It is scheduled on described movable piece；And a piezoelectric unit, in being fixed on described opening and against described contact bar, Described piezoelectric unit is used for deforming upon to produce the frictional force described movable piece of drive between bar with described contact Move in described receiving space along described guide rod.

Compared to prior art, the driving means of the embodiment of the present invention is with being arranged on movable piece and fixed mount On Magnet and magnetic piece make movable piece have an original state, and Magnet and magnetic piece arrange remote Tripping electric unit, therefore need not the extra reserved height space accommodating piezoelectric unit, so that drive dress The height put is less；Owing to the magnetic piece that quality is less is fixed on movable piece, the Magnet position that quality is bigger On fixed mount, so that piezoelectric unit needs less driving force that camera lens module can be driven to move；Separately Outward, owing to only using a Magnet can simplify driving means assembling flow path, it is also possible to avoid two Magnet Alignment issues；Moreover, fix movable piece by the captivation between Magnet and magnetic piece, and Magnet with Do not interact between contact bar, therefore, the selection of contact bar can not be limited, and can be any material Material.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of embodiment of the present invention driving means.

Fig. 2 is the exploded view of embodiment of the present invention driving means.

Fig. 3 is the exploded view of the embodiment of the present invention another angle of driving means.

Main element symbol description

Driving means 100

Fixed mount 11

First receiving space 110

First through hole 111

Opening 112

First hole 113, location

First groove 114

Movable piece 12

Second receiving space 120

Second through hole 121

Third through-hole 122

Second groove 123

3rd groove 124

Supporting body 13

Light hole 130

Blind hole 131

Locating dowel 132

Guide rod 14

Piezoelectric unit 15

Magnet 16

Magnetic piece 17

Circuit board 18

Retaining piece 19

Contact bar 20

Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.

Detailed description of the invention

Referring to shown in Fig. 1, Fig. 2 and Fig. 3, the driving means 100 that the embodiment of the present invention provides is used for driving Camera lens module (not shown) is moved to realize focus operation, and driving means 100 includes fixed mount 11, movable Part 12, supporting body 13, guide rod 14, piezoelectric unit 15, Magnet 16, magnetic piece 17, circuit board 18, solid Gripping member 19 with contact bar 20.

Circuit board 18 is used for providing electric energy to make its work to piezoelectric unit 15, when circuit board 18 is to piezoelectric unit During 15 offer voltage, piezoelectric unit 15 has mechanical deformation, and the voltage of different directions has different directions Mechanical deformation, and different size of voltage has different size of mechanical deformation.Circuit board 18 can be General printed circuit board (PCB) or flexible circuit board (FPCB).

Fixed mount 11 is the square structure with the first receiving space 110, and the first receiving space 110 is used for receiving Hold movable piece 12, the central shaft of the first receiving space 110 and the optical axis coincidence of camera lens module.Fixed mount 11 An angle there is the first through hole 111 of a central shaft paralleloscope head mould group optical axis, fixed mount 11 has Having opening 112 on one sidewall of one through hole 111 in order to house piezoelectric unit 15, retaining piece 19 is used for will pressure In electric unit 15 is fixed on opening 112 and circuit board 18 is fixed on fixed mount 11.Fixed mount 11 is close One end of supporting body 13 has the first hole, location 113, and fixed mount 11 has tool on the sidewall of opening 112 Having the first groove 114, the first groove 114 to be used for housing fixed magnet 16, Magnet 16 can be fixed by glue In the first groove 114.

Movable piece 12 is movably arranged as in the first receiving space 110, and movable piece 12 is for having a center The square structure of the second receiving space 120 of the optical axis coincidence of axle and camera lens module, the second receiving space 120 It is used for housing camera lens module, so that camera lens module is transported up and down along optical axis under the drive of movable piece 12 Dynamic to realize focusing or zoom operation.

The first through hole 111 on corresponding fixed mount 11, an angle of movable piece 12 has paralleloscope head mould group Second through hole 121 of optical axis and third through-hole 122 and the second through hole 121 and third through-hole 122 are coaxially disposed, Guide rod 14 is located in the second through hole 121 and third through-hole 122, and two ends lay respectively at the first through hole 111 With in blind hole 131, it is positioned at the first through hole 111 and blind hole 131 (has corresponding first through hole on supporting body 13 111, the second through hole 121 and third through-hole 122 and arrange) in part can be fixed on by a glue mode Determine on frame 11 and supporting body 13 so that movable piece 12 under the guiding of guide rod 14 at the first receiving space Move up and down in 110.

The first groove 114 on corresponding fixed mount 11, movable piece 12 has the second groove 123, and second is recessed Groove 123 is used for housing magnetic piece 17, magnetic piece 17 and Magnet 16 and attracts each other, so that movable piece 12 is the most solid Determine frame 11 and be fixed on certain position, so that camera lens module has an initial state.

Movable piece 12 also has length paralleloscope head mould group optical axis on the sidewall with the second groove 123 Strip the 3rd groove 124, the 3rd groove 124 is used for housing fixing contact bar 20, when piezoelectric unit 15 is solid Being scheduled in the opening 112 of fixed mount 11, piezoelectric unit 15 contacts with contacting bar 20.

Being relatively fixed frame 11 and the shape of movable piece 12, supporting body 13 is square structure, and its geometric center has There is a light hole 130, be arranged on the image on supporting body 13 for making to be entered by the light of camera lens module With imaging in sensor (not shown).The corner of supporting body 13 is respectively provided with first locating dowel 132, First locating dowel 132 matches so that fixed mount 11 is fixed on the first hole 113, location on fixed mount 11 On supporting body 13.

When circuit board 18 provides voltage to piezoelectric unit 15, piezoelectric unit 15 can be by the electric energy conversion of input For the mechanical deformation of self, this mechanical deformation has the component of paralleloscope head mould group optical axis, this deformation component Make piezoelectric unit 15 and between bar 20, there is relative displacement with contacting, when piezoelectric unit 15 with contact bar 20 it Between interaction force more than frictional force therebetween time, be fixed on fixed mount due to piezoelectric unit 15 again Can not move on 11, then contact bar 20 drives movable piece 12 in piezoelectric unit 15 deformation under active force The driving of component is lower can be moved up and down in the first receiving space 110 of fixed mount 11 along guide rod 14, thus Camera lens module is made to realize focusing or zoom operation under the drive of movable piece 12 to obtain image clearly.

The Magnet 16 of driving means 100 and the setting of magnetic piece 17 are away from piezoelectric unit 15, therefore need not volume The outer reserved height space accommodating piezoelectric unit 15, so that the height of driving means 100 is less；Due to The magnetic piece 17 that quality is less is fixed on movable piece 12, and the Magnet 16 that quality is bigger is positioned on fixed mount 11, So that piezoelectric unit 15 needs less driving force that camera lens module can be driven to move；Further, since only Use a Magnet 16 can simplify driving means 100 assembling flow path, it is also possible to avoid the para-position of two Magnet Problem；Moreover, fix movable piece 12 by the captivation between Magnet 16 and magnetic piece 17, and Magnet 16 Do not interact between bar 20 with contacting, therefore, the selection of contact bar 20 can not be limited, Ke Yiwei Any materials.

It is used in it is understood that those skilled in the art also can do other change etc. in spirit of the present invention The design of the present invention, without departing from the technique effect of the present invention.These are according to present invention spirit The change done, all should be included in the interior of scope of the present invention.

Claims

1. a driving means, is used for driving the motion of camera lens module to realize focusing or zoom, described camera lens mould Group has optical axis, and described driving means includes:

One fixed mount, has the receiving space of central shaft and optical axis coincidence, described fixed mount has opening With the first groove；

One movable piece, is arranged in described receiving space, and described movable piece has the parallel described light of central shaft The through hole of axle and second groove corresponding with the first groove；

One magnetic piece, is fixed on described movable piece, and described magnetic piece is contained in the of described movable piece In two grooves；

One Magnet, on fixing described fixed mount, it is first recessed that described Magnet is contained on described fixed mount In groove, described movable piece is fixed in described fixed mount by the active force between described Magnet and magnetic piece On one predeterminated position；

One supporting body, matches for housing described movable piece with described fixed mount；

One guide rod, is located in the through hole of described movable piece, and two ends be separately fixed at described fixed mount and On supporting body；

One contact bar, is fixed on described movable piece；And

One piezoelectric unit, in being fixed on described opening and against described contact bar, described piezoelectric unit is used for Deform upon and drive described movable piece to exist along described guide rod to contact generation frictional force between bar with described Motion in described receiving space.

2. driving means as claimed in claim 1, it is characterised in that on described fixed mount, there is through hole, One end of described guide rod is fixed in described through hole.

3. driving means as claimed in claim 2, it is characterised in that on described supporting body, there is blind hole, The other end of described guide rod is fixed in described blind hole.

4. driving means as claimed in claim 1, it is characterised in that have described on described movable piece Having the 3rd groove of the parallel described optical axis of length direction on the sidewall of the second groove, described contact bar is fixed In described 3rd groove.

5. the driving means as described in any one of Claims 1-4, it is characterised in that described driving means Farther including retaining piece, described retaining piece is used for being fixed in described opening described piezoelectric unit.

6. driving means as claimed in claim 5, it is characterised in that described driving means is wrapped further Including a circuit board, described circuit board is fixed on described retaining piece and is electrical connected with described piezoelectric unit.

7. driving means as claimed in claim 5, it is characterised in that described fixed mount and described carrying The end face that body is relative is respectively provided with hole, location and locating dowel, and hole, described location and locating dowel match so that institute State fixed mount to be fixed on described supporting body.