CN101960351B - Lens actuator - Google Patents
Lens actuator Download PDFInfo
- Publication number
- CN101960351B CN101960351B CN2009801071849A CN200980107184A CN101960351B CN 101960351 B CN101960351 B CN 101960351B CN 2009801071849 A CN2009801071849 A CN 2009801071849A CN 200980107184 A CN200980107184 A CN 200980107184A CN 101960351 B CN101960351 B CN 101960351B
- Authority
- CN
- China
- Prior art keywords
- lens
- displacement
- lens actuator
- amplifying mechanism
- actuator
- 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.)
- Expired - Fee Related
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 55
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
A lens actuator which is thin, which is less likely to cause displacement of the position of a lens relative to the optical axis, and which provides a great amount of displacement for the amount of displacement of a drive source. A lens actuator having an annularly mounted lever type displacement enlarging mechanism has a structure in which those ends of the lever type displacement enlarging mechanism which are connected through a lever section are provided so as to face and cross a piezoelectric element which is a drive source. The construction minimizes a tilt of a lens when the lens is driven and allows the entire structure of the actuator to be thin.
Description
Technical field
The present invention relates to a kind of lens actuator.
Background technology
Current, in the mobile communicating equipment that with the mobile phone is representative, there is the additional equipment that camera function is arranged, can export the image that photographs to the outside.
The lens actuator that is equipped on the camera in this mobile communicating equipment roughly is divided into following two kinds: the structure that drives lens through the telescopic displacement of piezoelectric element etc.; The scioptics lens barrel drives the structure of lens.
Drive the structure of lens as above-mentioned through telescopic displacement, have following patented claim: TOHKEMY 2002-130114 (below be called patent documentation 1).The structure of this patent documentation 1 is that marmem with respect to the setting of inclined light shaft ground, is only extracted out the displacement of optical axis direction and lens are driven from flexible direction.Through shortening the distance of imaging apparatus and lens, can make camera mechanism integral miniaturization.
In addition, has following patented claim as the structure of having used lens barrel: TOHKEMY 2005-274796 (below be called patent documentation 2).It is characterized in that, lens barrel is moved to optical axis direction through the magnetic force that between coil-magnet, produces.
Therefore, compare with the existing Drive Structure that makes lens barrel rotation and can obtain good adaptability (summary responses ability), and drive with departing from through lens barrel can not had the lens that carry out to optical axis direction diametrically as guiding piece.
Patent documentation 1:JP spy opens 2002-130114
Patent documentation 2:JP spy opens 2005-274796
Summary of the invention
The problem that invention will solve
Yet; In above-mentioned patent documentation 1, passing through on the structure of the parallel support of lens support of elastomeric element, lens move on the direction vertical with optical axis when driving lens; Therefore the focal position of lens is fixed with respect to imaging apparatus, the service efficiency of imaging apparatus is poor.
In addition, the lens actuator that patent documentation 2 is put down in writing is that lens barrel is accommodated in inner structure, and therefore whole with respect to actuator thickness can't be set the moving range of lens bigger, is difficult to form the structure of slimming.
In view of the above problems, the object of the present invention is to provide a kind of lens actuator, its slimming and being difficult to produces lens position with respect to the departing from of optical axis, and can obtain bigger displacement with respect to the displacement of drive source.
The means that are used to deal with problems
To achieve these goals; The invention of technical scheme 1 is a kind of lens actuator that utilizes lever to come the displacement amplifying mechanism mounting type of displacement enlargement; Wherein use following structure: will dispose with the displacement amplifying mechanism ring-type of being located at these piezoelectric element two ends as the piezoelectric element of drive source, and the both ends of above-mentioned displacement amplifying mechanism are disposed across.
Through using said structure, lens actuator of the present invention can with as the displacement at the both ends of the piezoelectric element of drive source to the vertical direction conversion.Therefore, can make piezoelectric element as drive source become with respect to flexible direction is the configuration of horizontal type, can reduces the whole thickness of lens actuator.
In addition; Through the displacement amplifying mechanism ring-type is disposed; And the framework integral body of lens perimeter is used as lever, can set the displacement magnification of piezoelectric element bigger, and; Through making the structure of end portions cross, can carry out the moving of optical axis direction under the parallel state that keeps lens.
In addition, in the invention of technical scheme 2,, it is characterized in that, the framework split ground of displacement amplifying mechanism and lens actuator is constituted about technical scheme 1 described lens actuator.Therefore, can set the telescopic displacement of drive source bigger, and can make lens actuator integral miniaturization.
In addition, constitute displacement amplifying mechanism, can adjust the position of displacement amplifying mechanism end, therefore when lens mounting, can carry out the corresponding lens configuration of inner structure with the equipment that carries the lens actuator through split ground.
In addition, in the invention of technical scheme 3, it is characterized in that, be provided with tabular spacer at cross section.Can be suppressed at the power of the torsional direction of displacement amplifying mechanism end generation through the connection of lever.In addition, fix cross part, thereby can the relative position between the end be kept certain, carry out stable lens and drive through spacer.
Except above-mentioned effect, lens actuator of the present invention is drive source with the piezoelectric element, and is therefore different with the structure of rotating mirror cartridge type, when driving, can not produce the friction powder, forms to being difficult in optical axis, produce the structure of foreign matter.
Description of drawings
Fig. 1 is the skeleton view of the lens actuator that uses in the first embodiment of the present invention.
Fig. 2 is the decomposition diagram of the lens actuator that uses in the first embodiment of the present invention.
Fig. 3 is the skeleton view of the lens actuator that uses in the second embodiment of the present invention.
Fig. 4 is the decomposition diagram of the lens actuator that uses in the second embodiment of the present invention.
Label declaration
1 lens carrier
2 lens carrier support portions
3 lever portion
4 displacement amplifying mechanism ends
5 piezoelectric elements
6 spacers
7 base portions
8 back-up blocks
9 suspensions
The A optical axis direction
The B direction of stretching
Direction is amplified in the C displacement
D lens maintaining part
The e installation site
Embodiment
Below, utilize Fig. 1～Fig. 4 that first and second embodiment of the present invention is shown.
The skeleton view of the lens actuator that Fig. 1 representes to use in the first embodiment of the present invention.Can know by Fig. 1; The lens actuator of present embodiment constitutes; Displacement amplifying mechanism through ring-type configuration that lever portion 3 and displacement amplifying mechanism end 4 are formed by connecting; To be enlarged into the displacement that direction C is amplified in displacement as the displacement of the piezoelectric element 5 of drive source, through displacement amplifying mechanism end 4 is fixed on the base portion 7, and the telescopic displacement of piezoelectric element become the displacement of optical axis direction A.
Therefore; When lens carrier 1 carries lens, the displacement that can amplify drive source with the state that on optical axis, does not produce barrier, and be that the center has constituted displacement amplifying mechanism with optical axis A; Thereby can guarantee the length of lever portion 3, the magnification when above-mentioned displacement is amplified is set greatlyyer.
Fig. 2 representes the decomposition diagram of the lens actuator shown in above-mentioned first embodiment.Can know that by Fig. 2 the lens actuator of present embodiment is to clip the Drive Structure that spacer 6 intersects displacement amplifying mechanism end 4.
Therefore, be absorbed in the displacement of the torsional direction that each displacement amplifying mechanism end 4 of cross-over configuration produces by spacer, the lens carrier 1 that is supported by lens carrier support portion 2 can make it not produce obliquely and drive with stable status when optical axis A moves.
In addition; Through constituting lever portion 3 with base portion 7 splits ground; Can the reducing glass actuator whole flat shape, and, owing to be as the flexible direction B of the piezoelectric element 5 of drive source and the Drive Structure of optical axis A quadrature; Therefore compare with the lens actuator of lens barrel type, can make the thickness attenuation.
The skeleton view of the lens actuator that Fig. 3 representes to use in the second embodiment of the present invention.Can know that by Fig. 3 the lens actuator of present embodiment is different with the lens actuator shown in above-mentioned first embodiment, use the supported on both sides of displacement amplifying mechanism end 4 structure on lever portion 3 each other.
Therefore; In the present embodiment, compare, can further reduce the size of thickness direction with the lens actuator that the foregoing description 1 is put down in writing; And; Displacement enlarger end 4 receives stress from two contacts with lever portion 3, therefore about the driving scope of lens, compares with the foregoing description 1 and can set greatlyyer.
The decomposition diagram of the lens actuator that Fig. 4 representes to use in the present embodiment.Can know by Fig. 4, in the structure that present embodiment is put down in writing, the base portion 7 that the lens actuator that does not use the foregoing description 1 to put down in writing is possessed.Therefore, compare further slimming with the lens actuator of the foregoing description 1 record.
In addition,, between displacement amplifying mechanism end 4 and lens carrier support portion 2, clip back-up block 8 and regulate height about lens carrier 1, so the suspension 9 through ring-type from the two sides support of lens support 1.Therefore, the inclination that produces when lens carrier 1 is moved is absorbed by suspension 9, and the vibration can suppress lens and drive the time, and improves adaptability (summary responses ability).
In addition; Used the structure that has changed the thickness of lens carrier 1 at the installation site of lens carrier support portion 2 e and lens maintaining part d; Through changing the thickness of back-up block 8 and above-mentioned installation site, even become the structure that in the limited mounting space of the thickness of lens carrier 1, also can carry out focal adjustments.
In addition; Used warp architecture about end 4; Can improve production, and, resilient material used through making above-mentioned end 4; When the displacement of the piezoelectric element 5 that will be amplified by lever portion 3 becomes the displacement of optical axis direction A, can be absorbed in the displacement of the torsional direction that displacement amplifying mechanism end 4 produces.
As stated, through using the lens actuator of present embodiment record, a kind of lens actuator can be provided, its slimming and being difficult to produces lens position with respect to the departing from of optical axis, and can obtain bigger displacement with respect to the displacement of drive source.
Claims (3)
1. lens actuator; With the displacement of the flexible direction of piezoelectric element as drive source; Base portion at this lens actuator is provided with lever-type displacement amplifying mechanism, and this displacement amplifying mechanism is used to carry out the conversion to optical axis direction of amplification and the sense of displacement of above-mentioned displacement
Said lens actuator is characterised in that,
With piezoelectric element and the displacement amplifying mechanism ring-type configuration of being located at these piezoelectric element two ends,
The opposite sides of the piezoelectric element of end in above-mentioned ring-type configuration of above-mentioned displacement amplifying mechanism is intersected.
2. lens actuator according to claim 1, wherein,
The base portion split ground of above-mentioned displacement amplifying mechanism and said lens actuator is constituted.
3. lens actuator according to claim 1 and 2, wherein,
Be provided with tabular spacer at above-mentioned cross section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-106006 | 2008-04-15 | ||
| JP2008106006A JP5292529B2 (en) | 2008-04-15 | 2008-04-15 | Lens actuator |
| PCT/JP2009/057548 WO2009128463A1 (en) | 2008-04-15 | 2009-04-15 | Lens actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101960351A CN101960351A (en) | 2011-01-26 |
| CN101960351B true CN101960351B (en) | 2012-08-15 |
Family
ID=41199151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801071849A Expired - Fee Related CN101960351B (en) | 2008-04-15 | 2009-04-15 | Lens actuator |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5292529B2 (en) |
| KR (1) | KR101159171B1 (en) |
| CN (1) | CN101960351B (en) |
| WO (1) | WO2009128463A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011118277A (en) * | 2009-12-07 | 2011-06-16 | Namiki Precision Jewel Co Ltd | Lens actuator |
| JP5809448B2 (en) * | 2011-05-27 | 2015-11-10 | 並木精密宝石株式会社 | Temperature compensation structure of lens actuator |
| KR102351098B1 (en) | 2015-01-16 | 2022-01-14 | 삼성전자주식회사 | Camera and lens module |
| CN108444915B (en) * | 2018-03-20 | 2020-07-07 | 山东大学苏州研究院 | Piezoelectric-driven single-degree-of-freedom optical detection platform and using method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003258330A (en) * | 2002-03-07 | 2003-09-12 | Seiko Instruments Inc | Piezoelectric actuator having function for increasing displacement, and electronic apparatus provided with the same |
| WO2006043549A1 (en) * | 2004-10-19 | 2006-04-27 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric actuator, and image pickup element moving device and image pickup device using such piezoelectric actuator |
| CN1811513A (en) * | 2005-01-27 | 2006-08-02 | 柯尼卡美能达精密光学株式会社 | Lens unit and image pickup unit |
| JP3894509B2 (en) * | 1995-08-07 | 2007-03-22 | キヤノン株式会社 | Optical apparatus, exposure apparatus, and device manufacturing method |
| CN101025466A (en) * | 2006-02-20 | 2007-08-29 | 三星电机株式会社 | Lens driving device |
| CN101065957A (en) * | 2004-09-29 | 2007-10-31 | 纳诺动力有限公司 | Camera modules with lens transmission device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0619485B2 (en) * | 1985-11-15 | 1994-03-16 | 日本電気株式会社 | Piezoelectric lens driving device |
| JPH01199302A (en) * | 1988-02-03 | 1989-08-10 | Hitachi Ltd | Optical magnetic storage device |
| JP2711581B2 (en) * | 1990-04-16 | 1998-02-10 | アルプス電気株式会社 | Objective lens support mechanism for optical information devices |
| JP2875896B2 (en) * | 1991-02-08 | 1999-03-31 | オリンパス光学工業株式会社 | Optical head actuator |
| JPH10301013A (en) | 1997-04-25 | 1998-11-13 | Asahi Optical Co Ltd | Lens driving mechanism |
| JPH11204848A (en) * | 1998-01-16 | 1999-07-30 | Ricoh Co Ltd | Piezo-electric actuator device |
| JP2006038891A (en) * | 2004-07-22 | 2006-02-09 | Konica Minolta Photo Imaging Inc | Imaging apparatus |
| WO2008047782A1 (en) | 2006-10-16 | 2008-04-24 | Namiki Seimitsu Houseki Kabushikikaisha | Actuator |
-
2008
- 2008-04-15 JP JP2008106006A patent/JP5292529B2/en active Active
-
2009
- 2009-04-15 CN CN2009801071849A patent/CN101960351B/en not_active Expired - Fee Related
- 2009-04-15 WO PCT/JP2009/057548 patent/WO2009128463A1/en active Application Filing
- 2009-04-15 KR KR1020107015509A patent/KR101159171B1/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3894509B2 (en) * | 1995-08-07 | 2007-03-22 | キヤノン株式会社 | Optical apparatus, exposure apparatus, and device manufacturing method |
| JP2003258330A (en) * | 2002-03-07 | 2003-09-12 | Seiko Instruments Inc | Piezoelectric actuator having function for increasing displacement, and electronic apparatus provided with the same |
| CN101065957A (en) * | 2004-09-29 | 2007-10-31 | 纳诺动力有限公司 | Camera modules with lens transmission device |
| WO2006043549A1 (en) * | 2004-10-19 | 2006-04-27 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric actuator, and image pickup element moving device and image pickup device using such piezoelectric actuator |
| CN1811513A (en) * | 2005-01-27 | 2006-08-02 | 柯尼卡美能达精密光学株式会社 | Lens unit and image pickup unit |
| CN101025466A (en) * | 2006-02-20 | 2007-08-29 | 三星电机株式会社 | Lens driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009258300A (en) | 2009-11-05 |
| CN101960351A (en) | 2011-01-26 |
| KR20100094573A (en) | 2010-08-26 |
| WO2009128463A1 (en) | 2009-10-22 |
| JP5292529B2 (en) | 2013-09-18 |
| KR101159171B1 (en) | 2012-06-22 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20150415 |
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| EXPY | Termination of patent right or utility model |