CN107085275A - Lens driver - Google Patents
Lens driver Download PDFInfo
- Publication number
- CN107085275A CN107085275A CN201710046917.9A CN201710046917A CN107085275A CN 107085275 A CN107085275 A CN 107085275A CN 201710046917 A CN201710046917 A CN 201710046917A CN 107085275 A CN107085275 A CN 107085275A
- Authority
- CN
- China
- Prior art keywords
- suspension wire
- mobile unit
- lens
- lens driver
- base station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
- G03B3/10—Power-operated focusing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0007—Movement of one or more optical elements for control of motion blur
- G03B2205/0015—Movement of one or more optical elements for control of motion blur by displacing one or more optical elements normal to the optical axis
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0053—Driving means for the movement of one or more optical element
- G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils
Abstract
The present invention provides a kind of lens driver, and its suspension wire for enabling to support the mobile unit that can carry lenticular body for hand shaking amendment plays vibration-damping function.The mobile unit (20) for being equipped with Lens holder (25) is supported by the suspension wire (8) for being fixed on base station (11), by the axle cross-drive mechanism located at the upside of base station (11), mobile unit (20) is driven to the direction that optical axis direction intersects.By the way that suspension wire (8) is formed by the marmem of the Cu systems of martensitic phase, suspension wire (8) can play vibration-damping function, higher order resonances so as to suppress mobile unit (20) etc..
Description
Technical field
The present invention relates to the lens for making the mobile unit that can carry lenticular body be moved to the direction that the optical axis with lens intersects
Drive device, more particularly, to the lens driver of the function with the unnecessary vibration for suppressing mobile unit.
Background technology
Patent document 1 records the invention on lens driver.
Lens driver described in patent document 1 is fixed with four suspension wires on coil substrate, in the front end of suspension wire
Portion is supported with AF (automatic to focus on) unit.
In AF units, in the inner side of magnet retainer provided with the Lens holder for carrying lens.In magnet retainer
Upper end is fixed with upside leaf spring, using upside leaf spring come the upper end of supporting lens retainer.Consolidate in the lower end of magnet retainer
Surely there is downside leaf spring, using downside leaf spring come the bottom of supporting lens retainer.Moreover, the upper end of the suspension is fixed on
Upside leaf spring.
Provided with drive mechanism is focused on AF units, in the presence of its driving force, by upside leaf spring and downside leaf spring branch
The Lens holder held is moved to optical axis direction.Hand shaking correction mechanism is provided between pedestal and AF units, in its driving force
Under effect, moved from the AF units that suspension wire is supported to direction orthogonal with the optical axis.
The focusing drive mechanism is protected by being wound in the focus coil of the periphery of Lens holder and being maintained at the magnet
The inside and the permanent magnet opposed with the focus coil for holding frame are constituted.The hand shaking correction mechanism is provided with the upper surface of pedestal
Hand shaking amendment coil, the bottom of the permanent magnet is opposed with the hand shaking amendment coil.
In the lens driver described in patent document 1, in the case where being formed at four of magnet retainer of AF units
Damping piece is provided between lateral process and coil substrate.Damping piece is formed by ultraviolet curing silica gel.
By setting the damping piece, it can suppress described in when Lens holder is driven to optical axis direction in AF units
The generation of higher order resonances on the optical axis direction of AF units, additionally it is possible to relax when being given from outside impact to AF units
Impact.
Citation
Patent document 1：Japanese Unexamined Patent Publication 2013-44924 publications
In the lens driver described in patent document 1, in order to suppress the higher order resonances of AF units, kept in magnet
Ultraviolet curing silica gel is coated between frame and coil substrate, but because lens driver is very small, therefore in the position
Locate careful and coating silica gel in appropriate amount operation extremely difficult.In addition, the coating amount of silica gel easily produces deviation, therefore have
Such shortcoming is easily changed to the vibration suppressioning effect of AF units in each lens driver.
The content of the invention
The invention problem to be solved
The present invention is used to solve above-mentioned existing problem, its object is to there is provided a kind of without using gluey damping piece etc.
And the lens driver of the unnecessary vibration of the mobile unit supported by suspension wire can be suppressed.
Solution
The lens driver of the present invention is provided with base station, can carry the mobile unit of lenticular body, be supported on the base station
The supporting member of the mobile unit and make the mobile unit to the driving machine of the direction movement intersected with optical axis direction
Structure, it is characterised in that the supporting member be by the base station and the mobile unit link and can to the optical axis side
To the suspension wire of the Direction distortion of intersection, the suspension wire is formed by the marmem of martensitic phase.
The suspension wire of marmem of the lens driver of the present invention provided with martensitic phase is as by mobile unit branch
Hold as the supporting member to the direction movement intersected with optical axis direction freely.Subtract because the marmem of martensitic phase has
Shake function, therefore, it is possible to suppress to produce the unnecessary vibrations such as higher order resonances in mobile unit.
It should be noted that the present invention can be provided with the supporting member of many all by hanging that marmem is formed
Suspension wire that the supporting member of line or a part is formed by marmem, other supporting member are by copper, copper alloy
Etc. the suspension wire of common metal formation.That is, by the way that at least one of supporting member is set into what is formed by marmem
Suspension wire, can suppress unnecessary vibration when mobile unit is acted.
The lens driver of the present invention is preferably to be provided with Lens holder in the mobile unit and protect the lens
First coil and magnet that frame is moved to the optical axis direction are held, the suspension wire turns into the energization being powered to the first coil
Road, the suspension wire also remain the state of the martensitic phase in galvanization.
As described above, when being powered by suspension wire to first coil, by avoiding because the heating based on electric current causes transformation
For the austenite phase of the states such as super-elasticity, thus also vibration-damping function can be played all the time using suspension wire.
The lens driver of the present invention is preferably that the suspension wire is formed by the marmem of Cu systems.
By using the marmem of Cu systems, can reduce to first coil be powered when resistance value, and can
Vibration-damping function is effectively played in the state of martensitic phase.
The lens driver of the present invention is preferably that the suspension wire also keeps straight line in the state of austenite phase is changed into
Shape.
In said structure, in the state of long-time is placed in the condition of high temperature, suspension wire is also able to maintain that rectilinear form, therefore
The bearing state all-the-time stable of mobile unit can be made.
The lens driver of the present invention is preferably that the magnet located at the drive mechanism turns into the temperature of irreversible demagnetization
Less than the transition temperature that the suspension wire is changed into austenite phase.
Such lens driver is used within the temperature range of the magnet for constituting drive mechanism does not demagnetize, but passes through setting
Austenite phase is not transitioning within the range for suspension wire, suspension wire can be made to play vibration-damping function all the time.
Invention effect
By the present invention in that with the supporting member of the suspension wire of martensitic phase as supporting mobile unit, mobile unit by
When being driven with the direction that optical axis direction intersects, the unnecessary vibration such as higher order resonances can be suppressed and produced, thus allowed for steady
Fixed hand shaking amendment etc..
Brief description of the drawings
Fig. 1 is the stereogram for the lens driver that embodiments of the present invention are shown from top.
Fig. 2 is the stereogram that the lens driver shown in Fig. 1 is shown with the state for pulling down cover.
Fig. 3 is the exploded perspective that the lens driver shown in Fig. 1 is decomposed into cover, base station and mobile unit and shown
Figure.
Fig. 4 is the sectional view for splitting the lens driver shown in Fig. 1 with IV-IV lines.
Description of reference numerals：
1 lens driver；
2 covers；
8 suspension wires；
11 base stations；
12 metal bases；
20 mobile units；
21 movable bases；
25 Lens holders；
30 first leaf springs；
31 segmentation spring；
40 second leaf springs；
50 axial actuating mechanisms；
51 first coils；
52 magnet；
60 hardwares；
63 side plates；
70 axle cross-drive mechanisms；
71 second coils；
O central shafts.
Embodiment
Lens driver 1 shown in Fig. 1 be equipped on together with photographing element it is portable with telephone set, portable use information terminal
Device etc..Though being omitted in the following embodiments, it can be carried on lens driver 1 and the photographing element pair
The lenticular body (lens barrel or lens are in itself) put, lenticular body is driven to optical axis direction and carries out automatic focusing, in addition, thoroughly
Mirror body is carried out hand shaking amendment to being driven with the direction that optical axis direction intersects.
In the drawings, Z1 directions are the top of lens driver 1, and Z2 directions are the lower section of lens driver.Z1
Direction is the front that the object that should be shot by photographing element is present, and Z2 directions are the rears that photographing element is present.
Fig. 1 shows the unitary construction of lens driver 1, and Fig. 2 shows the lens driver 1 for the state for unloading cover,
Fig. 3 shows the lens driver 1 split according to main portions.
As shown in figure 3, lens driver 1 has base station formations 10.Synthetic resin system is provided with base station formations 10
Base station 11, be embedded with the metal base 12 for the metallic plate for being divided into 2 in the base station 11.Metal base 12 and base station 11 are logical
Cross so-called insert molding method and form as one.Four suspension wires 8 of composition supporting member are fixed with metal base 12
Base end part 8a, supports mobile unit 20 using the leading section 8b of suspension wire 8 to move to the direction (orthogonal direction) that Z axis intersects
Make freely.
Four suspension wires 8 are formed by marmem.The marmem be Cu systems, such as Cu-Al-Ni (copper-aluminium-
Nickel) alloy, Cu-Zn-Al (copper-zinc-aluminium) alloy, Cu-Al-Mn (copper-aluminium-manganese) alloy.
Suspension wire 8 is used in the state of the marmem is martensitic phase.Martensitic phase in this specification
State refer to, as crystal structure martensitic phase be leading position, be not that strictly speaking crystal structure must turn into
100% martensitic phase is such to look like.
Marmem Young's modulus in the state of martensitic phase is 23~41GPa or so, in the shape of austenite phase
Young's modulus is 70~80GPa or so under state (austenite phase is leading state).Marmem is being changed into austenite
It is in super elastic characteristics during phase, but somewhat viscoelastic characteristic is shown in martensitic phase, can be played while for elastomer
Vibration-damping function.Especially the marmem of copper system can play vibration-damping function when being used in the state of martensitic phase.
Among the alloy, Cu-Al-Mn (copper-aluminium-manganese) alloy, Cu-Zn-Al (copper-zinc-aluminium) alloy can be sent out in martensitic phase
Wave high vibration-damping function.
The circular cross section of suspension wire 8, and optical axis direction of the suspension wire 8 along lenticular body linearly extend, a diameter of 50 μm
Left and right, it is 3mm or so that the supporting span of mobile unit 20 is supported on base station 11.
Suspension wire 8 is also able to maintain that rectilinear form when being austenite phase from Martensite phase transition.Thus, even if lens drive
The use environment of device 1 unpredictably turns into high temperature sometimes and suspension wire 8 is changed into austenite phase, and also can stably support can
Moving cell 20.
It should be noted that due to using four suspension wires 8, therefore can also be that two for example therein by the shape
Memorial alloy is formed, and another two copper alloys by not being marmem etc. are formed.
By suspension wire 8 is made up of the marmem of Cu systems or simultaneously using Cu systems marmem with
Copper alloy is constituted, thus as being explained below, and when by suspension wire 8 as the circuit passband being powered to first coil, can be subtracted
Small energization resistance value.
As shown in figure 3, mobile unit 20 has the movable base 21 of the topmost positioned at Z1 directions.Movable base 21 is by closing
Resin material is formed.The frame portion 22 that top view is in quadrangle (generally square) is integrally formed with movable base 21
With four corners from frame portion 22, four legs 23 that direction (Z2 directions) extends down.
In mobile unit 20, Lens holder 25 is supported with movable base 21.Lens holder 25 is set for synthesis
Fat system, has the circular retaining hole 26 through above-below direction (Z-direction) in central portion opening.The lens of shooting are held in mirror
Cylinder, lens barrel (lenticular body) is fixed on retaining hole 26.It should be noted that omitting the figure of lens and lens barrel in embodiments
Show.
The central shaft O of Lens holder 25 is consistent with the optical axis of lens, and central shaft O is parallel with Z-direction.
As shown in figure 4, being wound with composition axial actuating mechanism (focusing drive mechanism) 50 in the periphery of Lens holder 25
First coil 51.The wire of first coil 51 is given along the direction winding around central shaft O to first coil 51
Control electric current is flowed up with the central shaft O sides intersected.
As shown in Figures 2 and 3, the first leaf spring 30 is made up of two separate segmentation spring 31,31.Each segmentation
Spring 31 is formed by the elastic metal sheet of the electric conductivity such as copper alloy, phosphor bronze sheet.The outside of each segmentation spring 31 is fixed
The camber of spring portion 34 in portion 32, inner side fixed part 33 and link outside fixed part 32 and inner side fixed part 33 is integrally formed.
The outside fixed part 32 of first leaf spring 30 is fixed on (Z2 on the downside of the direction of the frame portion 22 formed in movable base 21
Side) lower surface.As shown in figure 4, the inner side fixed part 33 of the first leaf spring 30 is fixed on the upper surface 25a of Lens holder 25.
Second leaf spring 40 is integrally formed by flexible metallic plate.The outside fixed part of second leaf spring 40, inner side are fixed
Portion and the camber of spring portion of the link outside fixed part and the inner side fixed part are integrally formed.
The outside fixed part of second leaf spring 40 is fixed on the leg 23 that position is formed down at the 4 of the movable base 21
Lower surface (towards the lower surface of Z2 sides), as shown in figure 4, inner side fixed part is fixed on the lower surface 25b of Lens holder 25.
Lens holder 25 is vertically supported by the first leaf spring 30 and the second leaf spring 40, is supported to movable relative to described
Bearing of trend (optical axis directions of lens) of the pedestal 21 along central shaft O moves freely.
As shown in figure 3, metal base 12 is embedded with plastic base station 11, as described above, metal base is divided
It is segmented into two parts.The support holes 13 based on elongated hole are formed with each corner for being divided into two-part metal base 12, are hanged
The base end part 8a of line 8 is fixed through support holes 13 and by soldering.
As shown in Fig. 3 etc., in mobile unit 20, the part of the first leaf spring 30 is from each of the movable base 21 of quadrangle
Individual corner is protruded.Support holes 36 are formed with the ledge of the first leaf spring 30, the leading section 8b of suspension wire 8 inserts support holes 36,
The leaf spring 30 of suspension wire 8 and first is brazed fixation.By the elastic deformation of suspension wire 8, mobile unit 20 is supported to can be to in
The direction (direction intersected with the optical axis of lens) that heart axle O intersects is mobile.
The terminal part for constituting a side of the wire of first coil 51 is brazed the segmentation for the side for being engaged in the first leaf spring 30
Spring 31, the terminal part of the opposing party of wire is brazed the segmentation spring 31 for the opposing party for being engaged in the first leaf spring 30.
As shown in figure 4, being provided with hardware 60 in mobile unit 20.Hardware 60 is by having magnetic metal plate shape
Into, and play the function of the yoke as the magnetic circuit for constituting axial actuating mechanism 50 and axle cross-drive mechanism 70.Metal structure
Part 60 has four side plates 63, and magnet 52 is fixed with by binding agent etc. in the inner side of side plate 63.Therefore, hardware 60
Also it is to maintain the magnet holding member of magnet 52.It should be noted that although not shown, but in the leaf spring 30 of hardware 60 and first
Between the insulating barrier provided with film or sheet.Therefore, two segmentation spring 31 will not be turned on by hardware 60.
As shown in figure 4, making the axial actuating mechanism 50 that Lens holder 25 is moved to optical axis direction be protected by being wound in lens
First coil 51, the magnet 52 and the hardware 60 for holding the periphery of frame 25 are constituted.
As shown in Figure 3 and Figure 4, it is provided with axle cross-drive mechanism 70 in the upside of base station 11.Axle cross-drive mechanism 70 by
Four on base station 11 the second coils 71, the magnet 52 and the hardware 60 is arranged on to constitute.Therefore, axle intersects
Drive mechanism 70 is located at base station formations 10 and mobile unit 20.Axle cross-drive mechanism 70 be make mobile unit 20 to light
The drive mechanism for the direction movement that direction of principal axis intersects.It should be noted that in the present embodiment, although by hardware 60 by
Have magnetic metallic plate to be formed, but it is also possible to using as the hardware of magnet holding member by nonmagnetic metallic plate or
Synthetic resin material is formed.In this case, hardware 60 does not constitute axle cross-drive mechanism 70.That is, mobile unit 20 is made
At least there is the coil 71 of magnet 52 and second to the axle cross-drive mechanism 70 of the direction movement intersected with optical axis direction and constitute.
Equally, in the case where not being formed hardware 60 by having magnetic metallic plate, axial actuating mechanism 50 is with First Line
Enclose 51 and be configured at the magnet 52 in the outside of the first coil 51 and constitute.
Each second coil 71 is formed as elongated plane winding pattern, and with the position for being located remotely from central shaft O
The outside electromagnetic action portion 71a and inner side electromagnetic action portion 71b positioned at the position close to central shaft O.Outside electromagnetic action portion 71a
In inner side electromagnetic action portion 71b, electric current is to the lower end with the bottom 52d and side plate 63 of the magnet 52 on them
Linearly flow in direction parallel 63a.Plurality of positions in the upper surface of base station 11 is formed with locator protrusions 14, second
The winding hollow bulb of coil 71 is chimeric with locator protrusions 14 and is positioned, and the second coil 71 and base station 11 are fixed by binding agent.
As shown in figure 4, when mobile unit 20 is installed on base station 11 via suspension wire 8, the bottom 52d of magnet 52
It is opposite to the outside electromagnetic action portion 71a and inner side electromagnetic action portion 71b of the second coil 71 centre, the side plate of hardware 60
The lower end 63a in portion 63 is opposite to outside electromagnetic action portion 71a surface.
As shown in figure 4, being provided with position detecting element 73 in the downside of the second coil 71 of base station 11.Position detecting element 73
For Hall element or magneto-resistance effect element.Position detecting element 73 is at least provided with two, a side and the magnet extended in X direction
52 downside is opposed, and the downside of magnet 52 of the opposing party with extending along Y-direction is opposed.
As shown in figure 3, the cover 2 provided with covering mobile unit 20 on lens driver 1.Cover 2 is by rolled plate, stainless
The formation such as steel steel plate.Cover 2 is in cubic shaped, and the top plate 2b in four side plate 2a and (Z1 directions) above is integrally formed.
The circular window 2c for passing through light is offered on top plate 2b.
As shown in figure 4, each side plate 2a lower edge 2d is connected to the upper of the base station 11 that is set in base station formations 10
Surface, base station 11 and cover 2 are fixed by binding agent etc..
Next, the action to the lens driver 1 of the construction is illustrated.
Each point of metal base 12 → each leaf spring 30 of suspension wire 8 → the first after the mutual segmentation of lens driver 1
Cutting the both ends of the wire of 31 → first coil of spring 51 turns into independent circuit passband, is constituted axially via the energization road direction
The first coil 51 of drive mechanism 50 gives control electric current.That is, suspension wire 8 constitutes the circuit passband being powered to first coil 51.
When giving control electric current to the first coil 51 for constituting axial actuating mechanism 50, using the control electric current and by magnetic
The magnetic field that iron 52 is produced, Lens holder 25 is moved in mobile unit 20 along central shaft O.At the rear of base station formations 10
(Z2 directions) is provided with photographing element, by the action along central shaft O of Lens holder 25, carries out relative to photographing element
Focusing.
From the conductive pattern (not shown) on the surface for being formed at base station 11 to the second line for constituting axle cross-drive mechanism 70
Circle 71 gives control electric current.As shown in figure 4, the magnetic of the lower end 63a using the first magnetizing surface 52a from magnet 52 to side plate 63
Logical Φ and the control electric current flowed to the second coil 71, mobile unit 20 are driven to the direction that central shaft O intersects.Need
It is noted that the second magnetizing surface 52b of magnet 52 is fixed on side plate 63 by binding agent etc..
Mobile unit 20 detects to the amount of movement with the central shaft O directions intersected by position detecting element 73, the detection
Output is fed back, so that the magnitude of current of the control electric current to giving the second coil 71 is controlled.Entered by the control action
Hand shaking amendment when row is shot etc..
At least one of suspension wire 8 of supporting mobile unit 20 is formed by the marmem of the Cu systems of martensitic phase,
Therefore, it is possible to play elasticity and play vibration-damping function.Therefore, using axle cross-drive mechanism 70 by mobile unit 20 to
During the direction driving that central shaft O intersects, the generation of the unnecessary vibration such as higher order resonances can be suppressed.
In order that axial actuating mechanism 50 is acted, it is powered to suspension wire 8 and gives the control electric current of first coil 51.Electricity now
Flow valuve is 50~100mA or so, and the resistance value of suspension wire 8 is set to 0.05~0.1 Ω or so.When therefore, being powered to suspension wire 8
Joule heat is less high, when lens driver 1 is acted, and the marmem for constituting suspension wire 8 will not be from martensite
Opposite austenite phase transition.
In addition, compared with the magnet 52 for constituting axial actuating mechanism 50 and axle cross-drive mechanism 70 be heated and as can not
Operating limit temperature during inverse demagnetization, constitute the marmem of suspension wire 8 from Martensite phase transition be austenite phase when turn
Temperature is set higher.
The operating limit temperature of lens driver 1 be magnet 52 be absorbed in irreversible demagnetization state temperature, when more than
During operating limit temperature, axial actuating mechanism 50 and axle cross-drive mechanism 70 can not be acted.But, the operating limit temperature is
High temperature more than 100 DEG C, in common use environment, magnet 52 is hardly absorbed in irreversible demagnetization.In lens driving
In device 1, by making the transition temperature of marmem be higher than the operating limit temperature, thus in common use environment
Under, suspension wire 8 will not be changed into austenite phase, and appropriate elastic bearing power and effectiveness in vibration suppression can be played all the time.
Claims (5)
1. a kind of lens driver, its provided with base station, can carry the mobile unit of lenticular body, support on the base station it is described
The supporting member of mobile unit and make the mobile unit to the drive mechanism of the direction movement intersected with optical axis direction,
Characterized in that,
The supporting member is to link the base station and the mobile unit and can be to the side intersected with the optical axis direction
To the suspension wire of deformation, the suspension wire is formed by the marmem of martensitic phase.
2. lens driver according to claim 1, it is characterised in that
In the mobile unit provided with Lens holder and make that the Lens holder moves to the optical axis direction first
Coil and magnet, the suspension wire turn into the circuit passband being powered to the first coil,
The suspension wire also remain the state of the martensitic phase in galvanization.
3. lens driver according to claim 1 or 2, it is characterised in that
The suspension wire is formed by the marmem of Cu systems.
4. lens driver according to any one of claim 1 to 3, it is characterised in that
The suspension wire also keeps rectilinear form in the state of austenite phase is changed into.
5. lens driver according to any one of claim 1 to 4, it is characterised in that
The temperature for turning into irreversible demagnetization located at the magnet of the drive mechanism is changed into turn of austenite phase less than the suspension wire
Temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-024652 | 2016-02-12 | ||
| JP2016024652A JP6626729B2 (en) | 2016-02-12 | 2016-02-12 | Lens drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107085275A true CN107085275A (en) | 2017-08-22 |
| CN107085275B CN107085275B (en) | 2020-04-10 |
Family
ID=59615278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710046917.9A Active CN107085275B (en) | 2016-02-12 | 2017-01-19 | Lens driving device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6626729B2 (en) |
| CN (1) | CN107085275B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275268A (en) * | 2018-03-14 | 2019-09-24 | 新思考电机有限公司 | Lens driver, camera apparatus and electronic equipment |
| CN117845731A (en) * | 2024-03-06 | 2024-04-09 | 上海路博减振科技股份有限公司 | Three-dimensional vibration-proof impact-isolating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110275268A (en) * | 2018-03-14 | 2019-09-24 | 新思考电机有限公司 | Lens driver, camera apparatus and electronic equipment |
| CN110275268B (en) * | 2018-03-14 | 2024-04-30 | 新思考电机有限公司 | Lens driving device, camera device and electronic apparatus |
| CN117845731A (en) * | 2024-03-06 | 2024-04-09 | 上海路博减振科技股份有限公司 | Three-dimensional vibration-proof impact-isolating device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2017142424A (en) | 2017-08-17 |
| JP6626729B2 (en) | 2019-12-25 |
| CN107085275B (en) | 2020-04-10 |
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