CN103792758B - Lens driver - Google Patents
Lens driver Download PDFInfo
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- CN103792758B CN103792758B CN201310446464.0A CN201310446464A CN103792758B CN 103792758 B CN103792758 B CN 103792758B CN 201310446464 A CN201310446464 A CN 201310446464A CN 103792758 B CN103792758 B CN 103792758B
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Abstract
The lens driver of a kind of apparatus main body miniaturization that can make while guaranteeing sufficient handshaking calibration result on the direction orthogonal with optical axis direction is provided.Lens driver (1) possesses the 1st holding body (2) and the 2nd and keeps body (3), 1st keeps body to possess the lens carrier (21) that can keep lenticular body, it is configured at the 1st ring-type coil (22) and the Magnet (23) of the surrounding of lens carrier (21), 2nd keeps body to keep body (2) to keep with moving freely on the 1st direction (X-direction) orthogonal and mutually orthogonal with optical axis direction and the 2nd direction (Y direction) by the 1st, be arranged at the 2nd coil (312) of the 2nd holding body (3) with the 1st coil (22) and the 2nd coil (312) across Magnet (23) in the direction of the optical axis from state arranged opposite.
Description
Technical field
The present invention relates to a kind of lens driver, particularly relate to one and be adapted for being equipped on portable
The lens driver of the magazine handshaking correction that the comparison of phone etc. is small-sized.
Background technology
In recent years, in being equipped on the lens driver of portable phone etc. of band camera, along with camera
High-performance, the requirement of multifunction, do not require nothing more than and possess automatic focusing function, also require possess hands
Image shake correction function.As having the lens driver of handshaking calibration function, such as, propose logical
Crossing the structure etc. that handshake correction apparatus correction is handshaking, this handshake correction apparatus has suspension wire
(suspension wire) and handshaking correction coil, this suspension wire will be provided with focusing coil and being configured at this
The auto-focusing lens driver entirety of the permanent magnet in the outside of focusing coil can shake twelve Earthly Branches
Holding, this handshaking correction coil is joined oppositely with the permanent magnet of auto-focusing lens driver
Put (referring for example to patent documentation 1).
Patent documentation 1: Japanese Unexamined Patent Publication 2011-65140 publication
But, in structure as above, owing to configuring permanent magnet in the outside of focusing coil, because of
This needs to make permanent magnet slimming to make lens driver miniaturization.But, make permanent magnet
In the case of slimming, correct handshaking miopragia by handshake correction apparatus.Therefore, deposit
In following problem: there is the limit in the slimming of permanent magnet, it is difficult to carry out orthogonal with optical axis direction
The miniaturization of the lens driver on direction.
Summary of the invention
The present invention completes in view of the above problems, its object is to provide a kind of and is guaranteeing sufficiently
The apparatus main body on the direction orthogonal with optical axis direction can be made while handshaking calibration result small-sized
The lens driver changed.
The lens driver of the present invention possesses: the 1st keeps body, has and can keep the saturating of lenticular body
Mirror support and make the travel mechanism that described lens carrier moves along optical axis direction；Body is kept with the 2nd,
Body is kept to be kept in 1st direction and 2nd orthogonal and mutually orthogonal with optical axis direction by the described 1st
Side moves up freely, and described travel mechanism possesses surrounding ring-type being configured at described lens carrier
1st coil and Magnet and constitute, described lens driver is characterised by, protects the described 2nd
Hold be provided with on body for make described 1st keep body move up in the side orthogonal with optical axis direction the 2nd
Coil, described 1st coil and described 2nd coil are to separate in the direction of the optical axis across described Magnet
State is arranged opposite.
According to said lens driving means, the 1st coil and the 2nd coil with across Magnet at optical axis direction
Upper from state arranged opposite, therefore, it is possible to the 1st coil and the 2nd coil are configured overlappingly, because of
This can make lens driver compact in size on the direction orthogonal with optical axis direction.It addition,
By the 2nd coil is used as handshaking correction coil, it is possible to effectively utilize the space of optical axis direction
Realize handshaking calibration function, therefore without making Magnet slimming, and be able to ensure that the most handshaking
Calibration result.Its result, can make while guaranteeing sufficient handshaking calibration result with optical axis
Apparatus main body miniaturization on the direction that direction is orthogonal.
In said lens driving means, it is preferred that described travel mechanism has: at described lens
The described Magnet being radially magnetized into different magnetic poles of support；Be configured at described Magnet with described
The inside yoke of the inner circumferential side that mirror support is opposed；And be configured at described Magnet outer circumferential side and with described in
The outside yoke that side yoke is opposed, is respectively arranged with than described Magnet in described inside yoke and described outside yoke
The most prominent the 1st extension of upper surface and the 2nd extension, at described 1st extension
And arrange described 1st coil between described 2nd extension, and at described 1st extension and the 2nd
The interval that the front of extension is provided with described 1st extension and described 2nd extension is interior than described
The part that side yoke and described outside yoke are narrow to the interval of the part that described Magnet clamps.
In this case, in the inner circumferential side configuration inside yoke opposed with lens carrier of Magnet, and
The outer circumferential side of Magnet configures the outside yoke opposed with inside yoke, therefore, it is possible to clip Magnet with yoke, therefore
The magnetic line of force intersected with the 1st coil can be increased.It addition, at the 1st extension and the 2nd extension
Front is provided with the interval of the 1st extension and the 2nd extension than inside yoke and outside yoke clip magnet
The narrow part in interval of part, therefore, it is possible to improve inside yoke and the outside of the position leaving Magnet
Magnetic force between yoke, therefore, even if the 1st coil is away from Magnet, it is also possible to guarantee thrust.
It addition, in said lens driving means, it is preferred that arrange oriented on the yoke of described outside
The bending section of described inside yoke curving.In this case, outside yoke is provided with to inside yoke
The bending section of curving, therefore, it is possible to simple structure at the 1st extension and the 2nd extension
Front forms the part narrower than the interval of the part of clip magnet.Further, since set on the yoke of outside
Putting bending section, therefore the existence of bending section does not affect the 1st coil size diametrically, it is possible to suppression
1st coil becomes big.
Further, in said lens driving means, it is preferred that across described curved in the yoke of described outside
Pars convoluta is almost parallel to upper end with from described bending section from described bending section to lower end.In this case,
Outside the most almost parallel, therefore, it is possible to prevent magnetic between inside yoke and outside yoke at bending section of yoke
The line of force produces obliquely, therefore, it is possible to guarantee the thrust making lens carrier move along optical axis direction.
Further, in said lens driving means, it is preferred that not to described 1st coil stream
Under alive original state, described bending section is configured in upper end and the lower end of described 1st coil
Between portion.In this case, bending section is configured between upper end and the bottom of the 1st coil,
Therefore the 1st coil is further away from Magnet, the part narrow with the interval of inside yoke and outside yoke opposed the 1st
The part of coil more increases, therefore the 1st coil is further away from Magnet, more can strengthen being subject between yoke
Magnetic force.
Further, in said lens driving means, it is preferred that described 1st coil is configured in institute
State the top of the 2nd coil.In this case, the 2nd coil is configured under the 1st coil and Magnet
Side, side, therefore without considering that the 1st coil, Magnet can determine relative to the installation site of substrate etc.
The installation site of the 2nd coil, therefore, it is possible to easily configuration the 2nd coil.
Further, in said lens driving means, such as, the described 1st keeps body to have holding respectively
The leaf spring of the upside leaf spring and downside leaf spring that are arranged on the upper and lower end of described lens carrier keeps
Component.In this case, via being kept at keeping the upside of component as the leaf spring of same component
Leaf spring and downside leaf spring and supporting lens support, therefore the dimensional discrepancy between leaf spring is little, it is possible to make force
Act appropriately on lens carrier.
Further, in said lens driving means, it is preferred that described upside leaf spring is provided with a pair,
Described 1st overhang is connected to described upside leaf spring.In this case, it is possible to by upside
Leaf spring is with acting on the component to the 1st coil electricity, therefore without arranging other component, it is possible to cut down
Parts number of packages.
Further, in said lens driving means, it is preferred that keep body by constituting the described 2nd
One end of the suspension wire of a part is connected to described upside leaf spring, on the other hand by the other end of described suspension wire
It is connected to power supply and unit is provided.In this case, it is possible to via suspension wire and upside leaf spring to the 1st line
Circle energising, therefore without using other component, it is possible to cuts down parts number of packages.
Further, in said lens driving means, it is preferred that described suspension wire is configured in described plate
Spring keeps the corner of component.In this case, suspension wire is configured at corner, therefore, it is possible to effectively utilize
Space, therefore, it is possible to make lens driver size on the direction orthogonal with optical axis direction further
Miniaturization.
Further, in said lens driving means, it is preferred that described 2nd coil is printed coil,
Configure along the middle position of described Magnet.In this case, the 2nd coil is set to printed coil,
Therefore, it is possible to realize lens driver slimming in the direction of the optical axis.
According to the present invention, can make while guaranteeing sufficient handshaking calibration result with optical axis side
Apparatus main body miniaturization on orthogonal direction.
Accompanying drawing explanation
Fig. 1 is the exploded perspective view of the lens driver involved by one embodiment of the present invention.
Fig. 2 is the axonometric chart illustrating the state assembling said lens driving means from upper side.
Fig. 3 is the axonometric chart in the case of the lens driver shown in Fig. 2 removes outside housing.
Fig. 4 is that side illustrates housing and suspension outside the lens driver shown in Fig. 2 removes from below
The axonometric chart of the situation of mechanism part.
Fig. 5 is that the line A-A of the lens driver shown in Fig. 2 is to regarding sectional view.
Fig. 6 is that the line B-B of the lens driver shown in Fig. 2 is to regarding sectional view.
Description of reference numerals
1: lens driver
2: auto-focusing actuator
3: suspension fork mechanism portion
4: outside housing
41: peristome
41a: notch
42: peristome
21: lens carrier
211: retention tab
212: protrusion tab
212a: arm
213: boss
214,215: spacer
22: the 1 coils
221,222: end
23,23a～23d: Magnet
24,24A, 24B: inside yoke
241: wall portion
242: linking part
243: the 1 extensions
244: recess
25: outside yoke
251: side of sidewall portion
252: linking part
253: the 2 extensions
253a: recess
253b: stop part
254: bending section
26: leaf spring keeps component
261: frame-shaped portion
261a: recess
262: leg
262a, 262b: boss
27,27A, 27B: upside leaf spring
271: outside fixed part
271a, 271b: through hole
272,273: inner side fixed part
272a: protrusion tab
272b: notch
273a: through hole
274: arm
28: downside leaf spring
281: outside fixed part
281a: through hole
282: inner side fixed part
282a: notch
283: arm
31: the 2 coils keep component
311: peristome
312: printed coil (the 2nd coil)
313: through hole
32: suspension wire
33:FPC
331: peristome
332: through hole
333: extension
34: lower side body
341: peristome
342: through hole
343: through hole
344: stator
345: stage portion
35: magnetic detecting element
Detailed description of the invention
Below, embodiments of the present invention are described in detail with reference to the attached drawings.Fig. 1 is a reality of the present invention
Execute the exploded perspective view of lens driver involved by mode.As it is shown in figure 1, lens driver 1
Constitute including such as lower part: the auto-focusing actuator 2 of automatic focusing function, adjust camera
Focus；And the suspension fork mechanism portion 3 of handshaking correction, by making auto-focusing actuator 2 and hands
Shake correspondingly carries out minute movement and camera axis is kept fixing.In lens driver 1,
As the 1st auto-focusing actuator 2 keeping body and as the 2nd suspension fork mechanism portion 3 keeping body
It is contained in outside housing 4.
Auto-focusing actuator 2 includes: lens carrier 21, keeps not shown lenticular body；Constitute
Make the 1st coil 22 of travel mechanism that this lens carrier 21 moves along optical axis direction, Magnet 23,
Inside yoke 24 and outside yoke 25 and install the leaf spring of side plate spring 27 and downside leaf spring 28 and keep structure
Part 26.
Lens carrier 21 is that the resin material such as making insulating properties shapes and constitutes, and is substantially arranged to circle
Barrel shape.At the outer peripheral face of lens carrier 21, the radial outside arranging oriented lens carrier 21 highlights
And for keeping multiple (four in the present embodiment) retention tab 211 of the 1st coil 22.Protect at these
The surface holding sheet 211 is formed with planar portions.Not shown lenticular body is such as screwed into and is arranged at lens carrier
The thread groove of the inner circumferential of 21 and be installed on lens carrier 21.
Prominent prominent of the radial outside of oriented lens carrier 21 it is respectively provided with in the upper end of retention tab 211
Sheet 212.Protrusion tab 212 the most substantially has U-shaped, is provided with the arm 212a of two strand.
The bottom of protrusion tab 212 is configured at the recess 244 of inside yoke 24 described later, and arm 212a is configured at
The recess 253a of outside described later yoke 25 and leaf spring keep on the recess 261a of component 26.By this
Structure, inside yoke 24, outside yoke 25 and leaf spring keep component 26 to be positioned, and lens carrier
The rotation of 21 is limited.
Upper surface at a pair protrusion tab 212 is provided with the multiple boss for fixed upper leaf spring 27
(boss)213.These boss 213 are in the state of the through hole 273a being inserted through upside described later leaf spring 27
Under deformed by hot riveting etc., thus fixed upper leaf spring 27.Additionally, in FIG, show
Go out the state that these boss 213 deform.
It addition, be provided with for by upside leaf spring in the upper end of the protrusion tab 212 being not provided with boss 213
The spacer 214 of 27 location.These spacers 214 are protrusively provided upward from protrusion tab 212,
It is configured to engage with the notch 272b of upside described later leaf spring 27.
Similarly, the lower end in retention tab 211 is provided with the spacer for being positioned by downside leaf spring 28
215 (the most not shown, with reference to Fig. 4).These spacers 215 are from retention tab 211 pleurapophysis downwards
Arrange with going out, be configured to engage with the notch 282a of downside described later leaf spring 28.
1st coil 22 has the line part of the retention tab 211 for being bonded and fixed to lens carrier 21
Point, substantially Shu Chenghuan shape.The end 221,222 of the 1st coil 22 is drawn out to lens carrier respectively
Protrusion tab 212 side of 21, is bundled in the prominent of the upside described later leaf spring 27 that is fixed on protrusion tab 212
Slice 272a.Additionally, the 1st coil 22 can also be the retention tab being directly wound on lens carrier 21
Structure on 211.
Magnet 23 is made up of four Magnet 23a～23d, is respectively provided with rectangular shape, shown in Fig. 1
Lens carrier 21 be radially magnetized into different magnetic poles.Such as, difference phase in Magnet 23a～23d
To inner side half be configured to S pole, outside half is configured to N pole.The medial part of Magnet 23a～23d
Dividing the outer peripheral face with inside yoke 24 to be adhesively fixed, Outboard Sections is bonding with the inner peripheral surface of outside yoke 25 solid
Fixed, thus Magnet 23a～23d is clamped by inside yoke 24 and outside yoke 25 and configures.
Inside yoke 24 such as carries out machining to magnetic metal material and constitutes, by pair of inside
Yoke 24A, 24B are constituted.Inside yoke 24A, 24B are respectively provided with flat wall portion 241 and incite somebody to action
The linking part 242 that wall portion 241 links.In wall portion 241, in the bottom with wall portion 241
Be adhesively fixed under the state that the mode alignd with the bottom of Magnet 23 positions Magnet 23.In wall portion
A pair 1st the most prominent than the upper surface of the Magnet 23 being configured so that it are respectively arranged with in 241
Extension 243 (with reference to Fig. 6).Collecting lens carrier 21 it is formed with between a pair the 1st extensions 243
The recess 244 of protrusion tab 212.
Outside yoke 25 such as carries out machining to magnetic metal material and constitutes, and is arranged to square tube
Shape.Outside yoke 25 has flat side of sidewall portion 251 and the linking part 252 linked by side of sidewall portion 251.
Side of sidewall portion 251 highlights more to the lower side than linking part 252.
On side of sidewall portion 251, align with the bottom of Magnet 23 with the bottom of side of sidewall portion 251
Be adhesively fixed under the state that mode positions Magnet 23.In side of sidewall portion 251, it is respectively arranged with ratio so join
The 2nd extension 253 (with reference to Fig. 6) that the upper surface of the Magnet 23 put is the most prominent.Stretch the 2nd
A pair that goes out to be provided with near the upper end side central authorities in portion 253 the arm 212a housing lens carrier 21 recessed
Portion 253a.
Stop part 253b it is provided with between a pair recess 253a.The upper end of stop part 253b is constituted
For highlighting the most upward in outside yoke 25.Stop part 253b be configured in an initial condition with
The end face of outside described later housing 4 is from predetermined distance, when impact is applied to outside housing 4 with outer
The end face of side body 4 abuts, as being used for preventing the structure members such as lenticular body from contacting with outside housing 4
Stop part function.
The side of sidewall portion 251 inside lateral bend ground of the 2nd extension 253 is formed.By this structure, in side
Bending section 254 (with reference to Fig. 6) it is provided with between wall portion the 251 and the 2nd extension 253.Bending section 254
It is configured to be substantially orthogonal with side of sidewall portion the 251 or the 2nd extension 253.That is, side of sidewall portion 251 and the 2nd
Extension 253 is configured to clip bending section 254 from bending section 254 to the lower end of side of sidewall portion 251
Part is almost parallel with the part from bending section 254 to the upper end of the 2nd extension 253.
Leaf spring keeps component 26 to be that the resin material such as making insulating properties shapes and constitutes, and has with outward
The profile same shape of the upper surface of side yoke 25.Outside leaf spring keeps component 26 to have and be configured at
Frame-shaped portion 261 on the bending section 254 of side yoke 25 and the four corners from frame-shaped portion 261 are downwards
The leg 262 that side is stretched out.Leg 262 is configured to overlapping with the linking part 252 of outside yoke 25.
In frame-shaped portion 261, the central authorities of the part on the bending section 254 being configured at outside yoke 25 are attached
Closely it is respectively arranged with the recess 261a of the arm 212a of configuration lens carrier 21.Upper at leg 262
Surface configuration has the multiple boss 262a for fixed upper leaf spring 27.These boss 262a is inserting
Deformed by hot riveting etc. under the state of the through hole 271a of upside described later leaf spring 27,
Thus fixed upper leaf spring 27.Additionally, in fig. 1 it is illustrated that the state that deforms of boss 262a.
Similarly, the lower surface at leg 262 is provided with the multiple boss for fixing downside leaf spring 28
262b (the most not shown, with reference to Fig. 4).These boss 262b is being inserted through lower side panel described later
Deformed by hot riveting etc. under the state of the through hole 281a of spring 28, thus fixing lower side panel
Spring 28.
Upside leaf spring 27 such as makes the conductive materials such as phosphor bronze shape and constitute, and substantially has circle
Ring-shaped.Upside leaf spring 27 is made up of leaf spring 27A, 27B on the upside of a pair, has and is individually fixed in plate
Outside fixed part 271 that spring keeps component 26, the inner side of upper surface being fixed on lens carrier 21 are fixed
Portion 272,273 and the arm 274 that outside fixed part 271 is linked with inner side fixed part 272,273.
Multiple through hole 271a it is provided with in the assigned position of outside fixed part 271.Structure is kept at leaf spring
Under the state that the boss 262a of part 26 is inserted through these through holes 271a, upside leaf spring 27 is fixed on plate
Spring keeps component 26.It addition, be provided with suspension wire 32 institute described later in the angle part of outside fixed part 271
Through through hole 271b.
The protrusion tab 272a that oriented radial outside is prominent is set in the assigned position of inner side fixed part 272.
The end 221,222 of the 1st coil 22 is bundled on protrusion tab 272a respectively.Additionally, although it is not shown,
But the end 221,222 of the 1st coil 22 is welded on protuberance 272a.It is configured to via so connecting
The end 221,222 that connects and upside leaf spring 27A, 27B and the 1st coil 22 turn on.Including it addition,
The assigned position of side fixed part 272 is provided with multiple notch 272b.These notch 272b receives
Under the state of the spacer 214 holding lens carrier 21, upside leaf spring 27 is fixed in lens carrier 21.
It is respectively arranged with through hole 273a in the assigned position of inner side fixed part 273.At lens carrier 21
Boss 213 be inserted through these through holes 273a state under, upside leaf spring 27 is fixed on lens and props up
Frame 21.
Downside leaf spring 28 is such as to make the conductive materials such as phosphor bronze shape in the same manner as upside leaf spring 27
And constitute.Downside leaf spring 28 has and is fixed on leaf spring and keeps the outside fixed part 281 of component 26, solid
Due to lens carrier 21 lower surface inner side fixed part 282 and by outside fixed part 281 and inner side
The arm 283 that fixed part 282 links.
Multiple through hole 281a it is provided with in the assigned position of outside fixed part 281.Structure is kept at leaf spring
Under the state that the boss 262b of part 26 is inserted through these through holes 281a, downside leaf spring 28 is fixed on
Leaf spring keeps component 26.
Multiple notch 282a it is provided with in the assigned position of inner side fixed part 282.At these notch
Under the state of the spacer 215 housing lens carrier 21 in 282a, downside leaf spring 28 is fixed in
Mirror support 21.
Suspension fork mechanism portion 3 includes that the 2nd coil keeps component 31, suspension wire 32, FPC (flexible printing base
Plate) 33, lower side body 34 and magnetic detecting element 35 and constitute.
2nd coil keeps component 31 to be such as by thin for multi-disc (being two panels in the present embodiment) insulating properties
Film is configured to rectangular-shaped gained across bonding agent stacking, near central authorities, with not shown figure
As the position that sensor is corresponding is provided with rectangular-shaped peristome 311.At the periphery of peristome 311,
Four positions opposed with Magnet 23 are respectively arranged with printed coil 312.Printed coil 312 is thin
On film, the Wiring pattern of coil is formed as swirling gained, constitutes the 2nd coil.Additionally, respectively
The one end being formed at the Wiring pattern on the thin film of upside of institute's stacking and the thin film of downside is led each other
Logical.It is used as the 2nd coil, it is possible to realize by the printed coil 312 that will be configured on the substrates such as thin film
Slimming on the optical axis direction of lens driver 1.Four corners of component 31 are kept at the 2nd coil
Set up separately and be equipped with the through through hole of suspension wire 32 313.
Suspension wire 32 is formed by having resilient conductor, and one end (upper end) through composition auto-focusing is used
The through hole 271b of the upside leaf spring 27 of actuator 2 and be welded on the upper surface of upside leaf spring 27, separately
The through hole 342 of the through lower side body 34 described later of one end (bottom) and be welded on and be fixed in down
The FPC 33 (winding pattern) of side body 34.
FPC 33 has and the 2nd coil keeps the profile same shape of component 31, and is configured at
2nd coil keeps the printed coil 312 of component 31 to electrically connect.That is, the wiring diagram of the 2nd coil is constituted
The other end of case is via not shown the leading to being formed on the thin film constituting the 2nd coil holding component 31
The not shown winding pattern conducting that Kong Eryu is formed on FPC 33.FPC 33 is arranged near central authorities
There is rectangular-shaped peristome 331, four corners is provided with the through through hole of suspension wire 32 332.
Peristome 331 is configured to corresponding with the peristome 311 of the 2nd coil holding component 31.It addition, at FPC
The extension 333 that side is stretched out outward it is provided with on 33.This extension 333 is provided with winding
The not shown external connection terminals of pattern conducting.
Suspension wire 32 winding pattern with FPC 33 when through through hole 332 electrically connects.FPC
33 in order to provide electric power to arrange to lens driver 1, via suspension wire 32 from FPC 33 to
Upside leaf spring 27 flows through electric current.That is, FPC 33 is constituted for the electricity of the 1st coil 22 circulating current
Offer portion, source.
Lower side body 34 is that the resin material such as making insulating properties shapes and constitutes, and has and the 2nd line
Circle keeps the profile same shape of component 31.Lower side body 34 has been formed about square in central authorities
The peristome 341 of shape, is provided with the through through hole of suspension wire 32 342 in four corners.Opening
Portion 341 is configured to corresponding with the peristome 311 of the 2nd coil holding component 31.At lower side body 34
Four corners through hole 342 is set suspension wire 32 is configured at corner such that it is able to effectively utilize sky
Between, therefore, it is possible to make the lens driver 1 compact in size on the direction orthogonal with optical axis direction.
It is provided with near the adjacent both sides of peristome 341 for housing magnetic detecting element described later
The through hole 343 of 35.Periphery at through hole 342 is provided with for fixing the 2nd coil holding component
The stator 344 of the four corners of 31 and FPC 33.Stator 344 is configured to from lower side body 34
Upper surface highlight upward.It addition, lower side body 34 be provided around for embedding described later
The stage portion 345 of outside housing 4.
Magnetic detecting element 35 is such as made up of Hall element, in order to carry out the X-direction shown in Fig. 1,
The Magnetic testi of Y direction and respectively configuration one.Magnetic detecting element 35 is contained in lower side body 34
Through hole 343 in and be installed on the lower surface of FPC 33.
Outside housing 4 e.g. nonmagnetic material material is carried out what machining was constituted, be arranged to
The box like of the lower side opening shown in Fig. 1.Outside housing 4 is substantially arranged to rectangular-shaped, at its center
It is provided with the peristome 41 of toroidal.Circumference at peristome 41 is provided with and upside leaf spring 27
The notch 41a corresponding to shape of inner side fixed part 272,273.It addition, side body 4 times outside
End is provided with peristome 42, and this peristome 42 is for being embedded into lower side body by outside housing 4
34 stage portion 345 time make extension 333 housing 4 laterally of FPC 33 expose outside.
Then, illustrate to assemble the state of the lens driver 1 involved by present embodiment.Fig. 2
It it is the axonometric chart illustrating the state assembling lens driver 1 from upper side.Fig. 3 is from Fig. 2 institute
The lens driver 1 shown removes the axonometric chart in the case of the housing 4 of outside.Fig. 4 is side from below
Illustrate and remove outside housing 4 and the situation in suspension fork mechanism portion 3 from the lens driver 1 shown in Fig. 2
Axonometric chart.Additionally, in the diagram, for convenience of description, it is illustrated that constitute suspension fork mechanism portion 3
Magnetic detecting element 35.
As in figure 2 it is shown, when assembling lens driver 1, auto-focusing actuator 2 is joined
Put the inside of side body 4 outside, integrated with the suspension fork mechanism portion 3 being assembled on lower side body 34.
The inside of the peristome 41 of side body 4 is configured with lens carrier 21 outside.Not shown lenticular body is logical
Cross and embed from the lateral lens carrier in the top shown in Fig. 2 21 and assemble, be configured to prop up with lens
Frame 21 moves integratedly.It addition, expose the extension of FPC 33 from the peristome 42 of outside housing 4
333。
The inside of side body 4 outside, as it is shown on figure 3, at the suspension machine that following side body 34 is pedestal
Auto-focusing actuator 2 it is configured with in structure portion 3.At auto-focusing with in actuator 2, at outside yoke
It is configured with leaf spring on 25 and keeps component 26.It addition, inside yoke 24, outside yoke 25 and leaf spring keep
Component 26 is configured to surround lens carrier 21.
Lens carrier 21 is configured to, and protrusion tab 212 is positioned at the 1st extension 243 in inside yoke 24
Between (recess 244), arm 212a is positioned at the 2nd extension 253 recessed being arranged in the yoke 25 of outside
Portion 253a and leaf spring keep on the recess 261a in component 26.Not to the 1st coil 22 flow-thru electrode
Under the original state of stream, lens carrier 21 by upside leaf spring 27 and downside leaf spring 28 to the lower side by
Force, arm 212a keeps the recess 261a of component 26 to contact with leaf spring, thus is positioned.
It is inserted through the through hole 271a in the fixed part 271 of outside at the boss 262a of leaf spring holding component 26
State under, upside leaf spring 27 be fixed on leaf spring keep component 26 upper surface.It addition, in inner side
Notch 272b in fixed part 272 houses the spacer 214 of lens carrier 21 and at lens
Under the state that the boss 213 of support 21 is inserted through the through hole 273a in the fixed part 273 of inner side, on
Side plate spring 27 is fixed on the upper surface of lens carrier 21.221,222 points, the end of the 1st coil 22
It is not bundled on the protrusion tab 272a of the inner side fixed part 272 in the leaf spring 27 of upside.
Between the wall portion 241 and the side of sidewall portion 251 of outside yoke 25 of inside yoke 24 as shown in Figure 4
It is configured with Magnet 23 (23a～23d) like that.Now, Magnet 23 opposed with lens carrier 21 in
All sides are configured with inside yoke 24, and yoke 25 outside the outer circumferential side of Magnet 23 is configured with.It addition,
The mode of Magnet 23, inside yoke 24 and outside yoke less than 25 end part aligning is positioned.
It is inserted through the through hole 281a in the fixed part 281 of outside at the boss 262b of leaf spring holding component 26
State under, downside leaf spring 28 be fixed on leaf spring keep component 26 lower surface.It addition, in inner side
Under the state of the spacer 215 housing lens carrier 21 in the notch 282a in fixed part 282,
Downside leaf spring 28 is fixed on the lower surface of lens carrier 21.
Magnetic detecting element 35 along X-direction, Y direction configuration Magnet 23 lower side extremely
Few each configuration one.Near the central authorities that magnetic detecting element 35 is configured on the long side direction of Magnet 23.
Here, the position relationship of the member of formation of lens driver 1 is described with reference to Fig. 5, Fig. 6.Figure
5 is that the line A-A of the lens driver 1 shown in Fig. 2 is to regarding sectional view.Fig. 6 is shown in Fig. 2
The line B-B of lens driver 1 is to regarding sectional view.Additionally, in Fig. 5, Fig. 6, it is shown that not to
The lens driver 1 of the 1st coil the 22 and the 2nd coil (printed coil 312) circulating current initial
State.
As it is shown in figure 5, in lens driver 1, on the one end (upper end) of suspension wire 32 is through
The through hole 271b of the outside fixed part 271 in side plate spring 27 and be welded on outside fixed part 271
Upper surface.Through 2nd coil in the other end (bottom) of suspension wire 32 keeps the through hole of component 31
Through hole 332 and the through hole 342 of through lower side body 34 of 313 and FPC 33 and be welded on
FPC 33.By this structure, auto-focusing actuator 2 becomes can be joltily by suspension fork mechanism portion 3
The state of supporting, therefore, it is possible to make auto-focusing actuator 2 orthogonal with optical axis direction and mutually the most just
Move freely in the X-direction of friendship, Y direction.
The upper and lower surface of component 26 is kept, by making boss 262a, 262b deform at leaf spring
It is separately installed with outside fixed part 271 and the outside fixed part of downside leaf spring 28 of upside leaf spring 27
281.It addition, the upper and lower surface at lens carrier 21 is respectively fixed with in the leaf spring 27 of upside
Side fixed part 272,273 and the inner side fixed part 282 of downside leaf spring 28.
Lens driver 1 is under the original state shown in Fig. 5, and the upper surface of lens carrier 21 is positioned at
The position of the upper surface side closer to the top of component 26 is kept than leaf spring.Therefore, according to being fixed in leaf spring
Keep the outside fixed part 271 of the upper surface of component 26 and the upper surface being fixed in lens carrier 21
The relation of inner side fixed part 272,273, in upside leaf spring 27, by lens carrier 21 downwards
The power of side force works.
On the other hand, the lower surface of lens driver 1 lens carrier 21 in an initial condition is positioned at ratio
Leaf spring keeps the position of the lower surface side closer to the top of component 26.Therefore, according to being fixed in leaf spring guarantor
Hold the outside fixed part 281 of the lower surface of component 26 and the lower surface being fixed in lens carrier 21
The relation of inner side fixed part 282, in downside leaf spring 28, exerts a force to the lower side by lens carrier 21
Power work.
Thus, lens carrier 21 becomes by mutually the most liftoff upside leaf spring arranged opposite
27 and the force of downside leaf spring 28 and be held in the structure of the usual position of original state.So, logical
Cross a pair leaf spring (upside leaf spring 27 and downside leaf spring 28) by being installed on leaf spring holding component 26 to constitute
Lens carrier 21 is held in the elastic component of usual position, it is possible to make lens driver 1 at optical axis
Height dimension on direction diminishes.
As shown in Figure 6, in lens driver 1, the 2nd extension 253 in outside yoke 25 is
Outside yoke 25 is constituted to inside yoke 24 lateral bend.It addition, in outside yoke 25, clip bending
Portion 254 and be configured to from bending section 254 to the bottom of outside yoke 25 part with from bending section 254
Almost parallel to the part of upper end of outside yoke 25.Bending section 254 is configured with leaf spring and keeps structure
The frame-shaped portion 261 of part 26.
It is configured with Magnet between the wall portion 241 and the side of sidewall portion 251 of outside yoke 25 of inside yoke 24
23.Now, the mode of inside yoke 24, Magnet 23 and outside yoke less than 25 end part aligning is configured.
It addition, between the 1st extension 243 and the 2nd extension 253 of outside yoke 25 of inside yoke 24
It is configured with the 1st coil 22 being maintained on lens carrier 21.Additionally, in an initial condition, the 1st
The bending section 254 of outside yoke 25 it is configured with between upper end and the bottom of coil 22.It addition, the 1st
Interval between the leading section of extension the 243 and the 2nd extension 253 is configured to ratio and passes through inside yoke
24 and the interval of part of outside yoke 25 clip magnet 23 narrow.
On the other hand, in the lower side of Magnet 23, with the non-formation portion (hollow portion) of the Wiring pattern of coil
The mode opposed with the central part of Magnet 23 configures the 2nd coil and keeps conduct the 2nd line in component 31
The printed coil 312 of circle.So, (the print of the 1st coil the 22 and the 2nd coil in lens driver 1
Brush coil 312) with across Magnet 23 in the direction of the optical axis from state be configured.2nd coil keeps
Component 31 is configured at the 1st coil 22 and the lower side of Magnet 23, therefore without consider the 1st coil 22,
Magnet 23 can determine the peace of the 2nd coil (printed coil 312) relative to the installation site of substrate etc.
Holding position, therefore, it is possible to easily configuration the 2nd coil keeps component 31.
Then the action of explanation lens driver 1 involved by present embodiment.First, with reference to Fig. 6
The action of auto-focusing actuator 2 is described.Auto-focusing actuator 2 controls lenticular body at optical axis
Movement in movement on direction, i.e. Z-direction.
At auto-focusing with in actuator 2, produce magnetic field at multiple respective peripheries of Magnet 23.Magnet
23 owing to being clamped by inside yoke 24 and outside yoke 25 and the path of the magnetic line of force is controlled.By Magnet 23,
The magnetic line of force that the magnetic circuit that inside yoke 24 and outside yoke 25 are constituted is configured to intersect with the 1st coil 22 increases
Add.
When from FPC 33 via suspension wire 32 to epipleural spring 27 circulating current time, electric current via being bundled on
The 1st coil 22 is flow through in end 221,222 on the protrusion tab 272a of side plate spring 27.When electric current flows through
When being placed in 1 coil 22 in the magnetic field produced by Magnet 23, the 1st coil 22 produces thrust
(Lorentz force).Thus, lens carrier 21 overcome upside leaf spring 27 and the force of downside leaf spring 28 and
Move along the vertical direction.
It is S pole that Magnet 23 is such as configured to the inside yoke 24 side half shown in Fig. 6, outside yoke 25 side
Half is N pole.Thus, around Magnet 23 from generation magnetic field, outside yoke 25 lateral inside yoke 24 side.
Now, when circulating X-axis negative direction (from paper side the most inwards to) to the part A of the 1st coil 22
Electric current time, the 1st coil 22 produces the thrust of Z axis positive direction (upper direction).On the other hand,
When the electric current of the X-axis positive direction (to nearby direction from paper) that circulates to the part A of the 1st coil 22,
The thrust of Z axis negative direction (lower direction) is produced in the 1st coil 22.
Owing to the position of Magnet 23 is fixed, the most in general, the 1st coil 22 is further away from Magnet
23 magnetic force being subject to from Magnet 23 are the most weak.If the magnetic force being subject to from Magnet 23 is according to the 1st coil
Distance between 22 from Magnet 23 and different, then the thrust heterogeneity that produces in the 1st coil 22.
Therefore, it is configured in the lens driver 1 involved by present embodiment, at outside yoke 25
On bending section 254 is set, when the 1st coil 22 separates fixed range from Magnet 23, clip the 1st line
The inside yoke 24 of circle 22 and the interval of outside yoke 25 reduce.By this structure, the 1st coil 22 is more
The magnetic force being then subject to from Magnet 23 away from Magnet 23 is the most weak, on the other hand, and inside yoke 24 and outside yoke
Magnetic force between 25 becomes strong, and it is as a result, it is possible to make the magnetic force applying the 1st coil 22 close to constant.
Not under the original state of the 1st coil 22 circulating current, bending section 254 is configured at the 1st
Between upper end and the bottom of coil 22.Thus, in an initial condition, the 1st coil 22 is from interior
The little part in the interval of side yoke 24 and outside yoke 25 is (before the 1st extension 243-the 2nd extension 253
Between end) and it is positioned at inside yoke 24 and the outside yoke of position than bending section 254 side more on the lower
The big part (between wall portion 241-side of sidewall portion 251) in interval of 25 is respectively by strong magnetic force and weak
Magnetic force.Then, along with the 1st coil 22 is positioned at ratio away from Magnet 23, being sandwiched in of the 1st coil 22
Portion between 1st extension 243-the 2nd extension 253 of the position of bending section 254 side closer to the top
Dividing and increase, the magnetic force being subject to from this part gradually becomes strong.
Additionally, in an initial condition, bending section 254 be configured at than the 1st coil 22 lower surface more
On the lower in the case of the position of side, become the 1st coil 22 entirety in an initial condition and be sandwiched in the 1st
State between extension 243-the 2nd extension 253.But, according to this structure, along with the 1st line
The increase of circle 22 and the distance of Magnet 23, the 1st coil 22 be sandwiched in the 1st extension 243-the 2nd
Part between extension 253 will not change, it is impossible to makes the magnetic force applying the 1st coil 22 permanent
Fixed.And according to the lens driver 1 involved by present embodiment, bending section 254 in an initial condition
Be configured between upper end and the bottom of the 1st coil 22, therefore, along with the 1st coil 22 away from
Magnet 23, the part being sandwiched between the 1st extension 243-the 2nd extension 253 of the 1st coil 22
Being gradually increased, the magnetic force being subject to from this part gradually becomes strong, and therefore it is as a result, it is possible to make the 1st line
The magnetic force of circle 22 applying is close to constant.
It addition, as clipping the 1st coil 22 when the 1st coil 22 separates fixed range from Magnet 23
Inside yoke 24 and other structure of reducing of the interval of outside yoke 25, such as in view of making outside yoke 25
Side of sidewall portion 251 tilt structure.But, according to this structure, along with at inside yoke 24 and outside yoke
Producing the magnetic line of force between 25 obliquely, the thrust produced in the 1st coil 22 is also relative to Z axis obliquely
Produce, it is impossible to guarantee the thrust for moving along Z-direction.And according to involved by present embodiment
Lens driver 1, clips bending section 254 and is configured to from bending section 254 to outside yoke 25
The part of end is almost parallel with the part from bending section 254 to the upper end of outside yoke 25, therefore,
With these conjugated quadrature real estate magnetisation line of forces between inside yoke 24 and outside yoke 25, it is possible to make the 1st line
The thrust produced in circle 22 is parallel relative to Z axis, therefore, it is possible to substantially ensure that for moving along Z-direction
Dynamic thrust.
Further, the 1st coil 22 is clipped as when the 1st coil 22 separates fixed range from Magnet 23
Inside yoke 24 and other structure of reducing of the interval of outside yoke 25, such as in view of not being to make outside
Yoke 25 bends but the structure that makes inside yoke 24 bend.But, according to this structure, in order to by
The bending section of radial outside bending, needs to make the 1st coil 22 size diametrically become big.And according to
Lens driver 1 involved by present embodiment, is configured to arrange bending section on outside yoke 25
254, therefore, as long as the 1st coil 22 has the diameter of the external diameter that can pass through inside yoke 24,
Can make the 1st coil 22 size diametrically is required Min..
At auto-focusing with in actuator 2, such as according to from carrying the portable of lens driver 1
Phone, digital camera control portion drive instruction control to the 1st coil 22 energising the magnitude of current,
Direction, thus control thrust, make the 1st coil 22 move up and down and carry out its location.Thereby, it is possible to
Carry out the location of the lens carrier 21 being fixed the 1st coil 22, and can carry out being assembled in lens
The location of the lenticular body in support 21.Additionally, when stopping being energized to the 1st coil 22, lens prop up
Frame 21 correspondingly returns to initial position with the force of upside leaf spring 27 and downside leaf spring 28.
The action in suspension fork mechanism portion 3 is then described.Suspension fork mechanism portion 3 controls auto-focusing actuator 2
In 1st direction (such as X-direction) orthogonal and mutually orthogonal with optical axis direction with the 2nd direction is (such as
Y direction) on movement.
At auto-focusing with in actuator 2, produce magnetic field at multiple respective peripheries of Magnet 23.2nd
Coil keeps the printed coil 312 in component 31 to configure oppositely with each Magnet 23.When electric current stream
When crossing the printed coil 312 being placed in the magnetic field produced by Magnet 23, produce in printed coil 312
Thrust.Thus, auto-focusing with actuator 2 along with the shake of suspension wire 32 at X-direction and Y
Move on direction of principal axis.
It is S pole that Magnet 23 is such as configured to the inside yoke 24 side half shown in Fig. 6, outside yoke 25 side
Half is N pole.Thus, produce Fig. 6 from lateral inside yoke 24 side of outside yoke 25 around Magnet 23
Magnetic field as indicated by an arrow.Now, when bearing to the part B circulation X-axis of printed coil 312
During the electric current in direction (from paper side the most inwards to), printed coil 312 produces Y-axis negative direction
The thrust of (right direction).Additionally, now, the C portion of printed coil 312 flows through X-axis square
Electric current to (inboard to nearby direction from paper).
2nd coil keeps component 31 to be fixed on lower side body 34 together with FPC 33, and therefore Y-axis is just
The power in direction (left direction) puts on auto-focusing actuator 2, is fixed on the suspension wire of lower side body 34
32 become the state tilted relative to optical axis direction along Y direction shake.Its result, shake is freely
The auto-focusing actuator 2 that ground is supported by suspension wire 32 moves to Y-axis positive direction.
Magnet 23b, 23d shown in Fig. 6 and the print with the opposite configuration of 23b, 23d of these Magnet
Brush coil 312 controls auto-focusing actuator 2 movement in the Y-axis direction.On the other hand, and
Magnet 23a, 23c (ginseng of the limit opposite configuration adjacent with the limit that these Magnet 23b, 23d are configured
According to Fig. 1) and control auto-focusing with the printed coil 312 of these Magnet opposite configuration of 23a, 23c
With actuator 2 movement in the X-axis direction.
Be configured at Magnet 23a lower side magnetic detecting element 35 by detect Magnet 23a magnetic force,
Detect the position (with reference to Fig. 4) of the auto-focusing actuator 2 of the movement along with X-direction.Configuration
In Magnet 23d lower side magnetic detecting element 35 by detect Magnet 23d magnetic force, detect adjoint
The position of the auto-focusing actuator 2 of the movement of Y direction.
As discussed above, according to the lens driver the 1, the 1st involved by present embodiment
Coil 22 and the 2nd coil (printed coil 312) with across Magnet 23 in the direction of the optical axis from state
Opposite configuration, therefore, it is possible to join the 1st coil 22 overlappingly with the 2nd coil (printed coil 312)
Put, therefore, it is possible to make the lens driver 1 compact in size on the direction orthogonal with optical axis direction.
It addition, by the 2nd coil (printed coil 312) is used as handshaking correction coil, it is possible to effectively profit
Use up axial space to realize handshaking calibration function, therefore without making Magnet 23 slimming, and
It is able to ensure that sufficient handshaking calibration result.Its result, is guaranteeing sufficient handshaking calibration result
While can make the apparatus main body miniaturization on the direction orthogonal with optical axis direction.
Additionally, the present invention is not limited to above-mentioned embodiment, it is possible to carry out various change and implement.
In the above-described embodiment, in accompanying drawing, the size of diagram, shape etc. are not limited to this, are playing this
Can suitably change in the range of the effect of invention.In addition, without departing from the purpose of the present invention
Scope, it becomes possible to suitably change is implemented.
The most in the above-described embodiment, illustrate to be used as printed coil 312 situation of the 2nd coil.
But, the structure of the 2nd coil is not limited to this, it is possible to suitably change.Such as, the 2nd coil is also
It can be the structure of coiled electrical conductor.
Claims (11)
1. a lens driver, possesses:
1st keeps body, has and can keep the lens carrier of lenticular body and make described lens carrier edge
The travel mechanism that optical axis direction moves；With
2nd keeps body, keeps body to be kept into orthogonal with optical axis direction and mutually orthogonal by the described 1st
The 1st direction and the 2nd side move up freely,
Described travel mechanism possess the surrounding being configured at described lens carrier the 1st ring-type coil and
Magnet and constitute,
Described lens driver is characterised by,
Keep being provided with on body for making the described 1st to keep body orthogonal with optical axis direction the described 2nd
The 2nd coil that moves up of side, described 1st coil and described 2nd coil are with across described Magnet
The state separated in the direction of the optical axis is arranged opposite,
Described travel mechanism has: in the institute being radially magnetized into different magnetic poles of described lens carrier
State Magnet；It is configured at the inside yoke of the inner circumferential side opposed with described lens carrier of described Magnet；And
It is configured at the outer circumferential side of described Magnet and the outside yoke opposed with described inside yoke,
Described inside yoke and described outside yoke are respectively arranged with than described Magnet upper surface more up
Square the 1st prominent extension and the 2nd extension,
Described 1st coil is arranged between described 1st extension and described 2nd extension, and
The front of described 1st extension and the 2nd extension is provided with described 1st extension and the described 2nd
Between the part that described Magnet is clamped than described inside yoke and described outside yoke by the interval of extension
Every narrow part.
Lens driver the most according to claim 1, it is characterised in that
Described outside yoke arranges the bending section of oriented described inside yoke curving.
Lens driver the most according to claim 2, it is characterised in that
In the yoke of described outside across described bending section from described bending section to lower end with from described bending section to
Upper end is almost parallel.
Lens driver the most according to claim 2, it is characterised in that
Not under the original state of described 1st coil circulating current, described bending section is configured in
Between upper end and the bottom of described 1st coil.
Lens driver the most according to claim 3, it is characterised in that
Not under the original state of described 1st coil circulating current, described bending section is configured in
Between upper end and the bottom of described 1st coil.
6. according to the lens driver described in any one in Claims 1 to 5, it is characterised in that
Described 1st coil is configured in the top of described 2nd coil.
7. according to the lens driver described in any one in Claims 1 to 5, it is characterised in that
Described 1st keeps body to have the upper and lower end keeping being separately mounted to described lens carrier
Upside leaf spring and downside leaf spring leaf spring keep component.
Lens driver the most according to claim 7, it is characterised in that
Described upside leaf spring is provided with a pair, and described 1st overhang is connected to described upside
Leaf spring.
Lens driver the most according to claim 8, it is characterised in that
The one end constituting the suspension wire of the described 2nd part keeping body is connected to described upside leaf spring,
On the other hand the other end of described suspension wire is connected to power supply unit is provided.
Lens driver the most according to claim 9, it is characterised in that
Described suspension wire is configured in described leaf spring and keeps the corner of component.
11. according to the lens driver described in any one in Claims 1 to 5, it is characterised in that
Described 2nd coil is printed coil, configures along the middle position of described Magnet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-236701 | 2012-10-26 | ||
| JP2012236701A JP5963641B2 (en) | 2012-10-26 | 2012-10-26 | Lens drive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103792758A CN103792758A (en) | 2014-05-14 |
| CN103792758B true CN103792758B (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310446464.0A Active CN103792758B (en) | 2012-10-26 | 2013-09-25 | Lens driver |
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| Country | Link |
|---|---|
| JP (1) | JP5963641B2 (en) |
| CN (1) | CN103792758B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5963641B2 (en) | 2016-08-03 |
| CN103792758A (en) | 2014-05-14 |
| JP2014085624A (en) | 2014-05-12 |
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