JPS62116910A - Piezoelectric lens driving device - Google Patents
Piezoelectric lens driving deviceInfo
- Publication number
- JPS62116910A JPS62116910A JP60257141A JP25714185A JPS62116910A JP S62116910 A JPS62116910 A JP S62116910A JP 60257141 A JP60257141 A JP 60257141A JP 25714185 A JP25714185 A JP 25714185A JP S62116910 A JPS62116910 A JP S62116910A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- piezoelectric
- driving device
- reduce
- levers
- 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
Links
Landscapes
- Lens Barrels (AREA)
- Optical Recording Or Reproduction (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は圧電型レンズ駆動装置に係り、特にカメラや光
学式ディスク装置などに用いられるレンズの駆動装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a piezoelectric lens drive device, and particularly to a lens drive device used in cameras, optical disc devices, and the like.
一般に、レンズ駆動装置は、焦点距離すなわち倍率を変
化させるように、カメラ内のレンズまたはレンズ要素を
運動させる手段として使用される。Generally, a lens drive is used as a means to move a lens or lens element within a camera to change focal length or magnification.
従来、このような運動は、通常は回転型の電動機を含む
サーボ装置により行なわれている。Conventionally, such movements are performed by servo devices, usually including rotary electric motors.
上述した従来の回転型電動機を使用するサーボ装置は、
カメラにおけるレンズ要素を運動させるため大型となり
、速度も遅く、またかなりの電力を必要とする。The servo device using the conventional rotary electric motor mentioned above is
Because they move the lens elements in a camera, they are large, slow, and require considerable power.
また、他の種類の光学装置に対するレンズ運動用サーボ
装置における回転型電動機以外の電動機を使用すること
もある。例えば、米国特許でアｈ３．９９７，７１５号
には、ビデオ・ディスク再生装置の集束装置に使用する
ためのコイル型駆動装置を含むリニア・モータの使用に
ついて開示している。Motors other than rotary motors may also be used in servo systems for lens movement for other types of optical devices. For example, US Pat. No. 3,997,715 discloses the use of a linear motor containing a coil-type drive for use in a focusing device of a video disk player.
カメラにおけるコイル型のリニア・モータの使用に関連
する１つの問題は、露出の間適正な焦点位置にレンズを
保持するための待機時間に比較的大きな消費電力を要す
ることである。One problem associated with the use of coil-type linear motors in cameras is the relatively high power consumption required during standby time to hold the lens in the proper focus position during exposure.
本発明の目的は、かかる従来の欠点を除去し、小型で、
消費電力の小さい圧電型レンズ駆動装置を提供すること
にある。The object of the present invention is to eliminate such conventional drawbacks, to provide a compact and
An object of the present invention is to provide a piezoelectric lens drive device with low power consumption.
本発明の構成は、光学軸に沿ってレンズまたはレンズ要
素を運動させる圧電型レンズ駆動装置にお〜・て、圧電
縦効果により寸法歪を発生する圧電体と、この圧電体の
変位を拡大して所定向きの変位を発生する伝達機構と、
この伝達機構を前記レンズまたはレンズ要素に結合する
手段とを備えていることを特徴とする。The configuration of the present invention includes a piezoelectric lens drive device that moves a lens or a lens element along an optical axis, and a piezoelectric body that generates dimensional distortion due to a piezoelectric longitudinal effect, and a piezoelectric body that magnifies the displacement of this piezoelectric body. a transmission mechanism that generates displacement in a predetermined direction;
and means for coupling the transmission mechanism to the lens or lens element.
次に本発明について図面を参照して詳細に説明する。 Next, the present invention will be explained in detail with reference to the drawings.
第１図は本発明の実施例の圧電型レンズ駆動装置が用い
られた写真機を示すブロック図である。FIG. 1 is a block diagram showing a camera using a piezoelectric lens drive device according to an embodiment of the present invention.
同図において、本写真機は、一点鎖線の輪郭によって示
された、光を遮蔽するハウジングを有し、かつ各部を支
持する筐体部ｌに含まれている。In the figure, the present camera is included in a casing part l, which has a housing that blocks light and supports each part, as indicated by the outline of a dashed-dotted line.
この写真機は、本機から距離ｄの位置に配置された被写
体０の映像Ｉを、レンズ３を介して、フィルム２上に形
成する。支持体４は、フィルム２を支持固定する。今、
レンズ３の焦点面に配置して保持されるフィルム２は、
被写体０の距離ｄが変化する時、レンズ３の焦点面は、
支持体４により画成される面と一致しなくなる。そのた
め、異なる被写体０１の距離を許容するために、レンズ
３またはレンズ要素はフィルムの支持体４に対して移動
させて、レンズ３の焦点面をフィルムの支持体４により
画成される面と一致さ昼る機構を有する。写真機からよ
り遠い被写体０２ Ｋ対しては、レンズ３は前進方向Ｎ
に、より近い被写体に対しては後進方向ＰＫ移動する。This camera forms an image I of a subject 0 placed at a distance d from the camera on a film 2 through a lens 3. The support 4 supports and fixes the film 2. now,
The film 2 placed and held in the focal plane of the lens 3 is
When the distance d of the object 0 changes, the focal plane of the lens 3 is
It no longer coincides with the plane defined by the support 4. Therefore, in order to accommodate different subject distances, the lens 3 or lens element is moved relative to the film support 4 so that the focal plane of the lens 3 coincides with the plane defined by the film support 4. It has a mechanism for sunrise. For object 02K, which is farther from the camera, lens 3 is moved in the forward direction N.
Then, the camera moves in the backward direction PK toward a closer object.
また、距離ｄにおける被写体Ｏに対する所望の焦点調整
量を表わす焦点信号を生成する自動焦点検出器５と、こ
の自動焦点検出器５からの焦点信号に応答して所要のレ
ンズ調整を行なうため、可動するレンズ３に結合された
レンズ駆動装置７と、このレンズ駆動装置７に対して所
望の電圧を印加するレンズ駆動回路６と、レンズ駆動回
路６に供給するカメラ用電源８とが必要である。Additionally, there is an automatic focus detector 5 that generates a focus signal representing a desired amount of focus adjustment for the object O at a distance d, and a movable lens for making necessary lens adjustments in response to the focus signal from the automatic focus detector 5. A lens driving device 7 coupled to the lens 3 is required, a lens driving circuit 6 that applies a desired voltage to the lens driving device 7, and a camera power source 8 that supplies the lens driving circuit 6.
第２図は本実施例の圧電型レンズ駆動装置を示す正面図
である。第３図は第２図の駆動装置の断面図である。こ
れら同図において、圧電素子９の変位量を機械的に２段
階で増幅する変位拡大装置ｌＯとレンズ本体３Ｃとを有
する圧電型レンズ駆動装置が示されている。レンズ３は
、第３図の断面図にも示すように％胸部の１組のレンズ
要素３ａ、３ｂ と、レンズ本体３Ｃの焦点調整作用
を行なうように相対的に固定され鏡胴に取付られたレン
ズ要素とからなる。FIG. 2 is a front view showing the piezoelectric lens driving device of this embodiment. FIG. 3 is a sectional view of the drive device of FIG. 2. In these figures, a piezoelectric lens drive device is shown that includes a displacement amplifying device 10 that mechanically amplifies the amount of displacement of the piezoelectric element 9 in two stages, and a lens body 3C. As shown in the sectional view of FIG. 3, the lens 3 is relatively fixed and attached to the lens barrel so that a pair of lens elements 3a and 3b on the chest and a lens body 3C perform a focus adjustment function. It consists of a lens element.
変位拡大装置ｌＯにおいては、圧電素子９に電圧を印加
すると、矢印Ａ、 Ｂの方向に、蝶つがい１１ａ、ｌｌ
ｂを介して、レバー１２ａ、１２ｂを押し広げる。この
動きにより、蝶つがいＩＩｃ、ｌｉｄを支点として、テ
コの原理でレバー１２ｍ、１２ｂの点Ｘ、 Ｙを矢印Ｐ
、 Ｑの方向に変位させる。その先端に座屈バネ１３ａ
、１３ｂが接続されており、それを押し縮める。座屈バ
ネ１３ａ、１３ｂが座屈することにより、レンズ本体３
Ｃが、第３図の点線で示すように、変位する。In the displacement magnifying device IO, when a voltage is applied to the piezoelectric element 9, the hinges 11a and 11 move in the directions of arrows A and B.
Push the levers 12a and 12b apart through the levers b. With this movement, using the hinges IIc and lid as fulcrums, the points X and Y of the levers 12m and 12b are moved by the arrow P using the lever principle.
, displace it in the direction of Q. A buckling spring 13a is attached to the tip of the buckling spring 13a.
, 13b are connected and compressed. By buckling the buckling springs 13a and 13b, the lens body 3
C is displaced as shown by the dotted line in FIG.
圧電素子９として積層型素子を用いると、電圧１００Ｖ
を印加することにより、ｌＯμｍ変位する。次に、レバ
ー１１ａ、ｆｌｂの先端Ｘ、 Ｙの変位量は、テコの原
理より５倍位拡大され、５０μｍ位変位する。さらに座
屈バネ１３ａ、１３ｂを用いて拡大することにより、約
４倍位拡大され、レンズ本体３Ｃは０．２ｗｍ位変位す
る。When a laminated element is used as the piezoelectric element 9, the voltage is 100V.
By applying , it is displaced by 10 μm. Next, the amount of displacement of the ends X and Y of the levers 11a and flb is increased by about 5 times according to the lever principle, and is displaced by about 50 μm. Further, by enlarging the lens using the buckling springs 13a and 13b, the lens is enlarged by about 4 times, and the lens body 3C is displaced by about 0.2 wm.
本実施例の圧電型レンズ駆動装置の大きさは、２０ｍＸ
３５ＷＸ４ｗ位であり、従来の回転機を用いた駆動装置
に比べて、約５分の１位になっている。The size of the piezoelectric lens drive device of this example is 20mX
It is about 35W x 4W, which is about one-fifth of the drive device using a conventional rotating machine.
以上説明したように、本発明によれば、圧電素子及び変
位拡大機構をレンズ駆動装置に適用することにより、小
型な駆動装置を得ることが出来、また圧電素子を用いて
いるために待機時の消費電力がほとんど必要としないと
いう効果が得られる。As explained above, according to the present invention, by applying a piezoelectric element and a displacement magnifying mechanism to a lens driving device, a compact driving device can be obtained. The effect is that almost no power consumption is required.
第１図は本発明の一実施例の圧電型レンズ駆動す正面図
、第３図は第２図の圧電型レンズ駆動装置の断面図であ
る。
１・・・・・・筐体部、２・・・・・・フィルム、３・
・・・・・レンズ、４・・・・・・フィルムの支持体、
訃・・・・・自動焦点検出器、６・・・・・・レンズ駆
動回路、７・・・・・・レンズ駆動装置、８・・・・・
・カメラ用電源、９・・・・・・圧電素子、１０・・・
・・・変位拡大装置、１１・・・・・・蝶つがい、１２
・・・・・・レバー、１３・・・・・・座屈バネ。
率１ 回FIG. 1 is a front view of a piezoelectric lens drive device according to an embodiment of the present invention, and FIG. 3 is a sectional view of the piezoelectric lens drive device of FIG. 2. 1... Housing part, 2... Film, 3.
... Lens, 4 ... Film support,
Death... Automatic focus detector, 6... Lens drive circuit, 7... Lens drive device, 8...
・Camera power supply, 9...Piezoelectric element, 10...
...Displacement magnifying device, 11...Hingle, 12
...Lever, 13...Buckling spring. rate 1 time
Claims (1)
電型レンズ駆動装置において、圧電縦効果により寸法歪
を発生する圧電体と、この圧電体の変位を拡大して所定
向きの変位を発生する伝達機構と、この伝達機構を前記
レンズまたはレンズ要素に結合する手段とを備えている
ことを特徴とする圧電型レンズ駆動装置。A piezoelectric lens drive device that moves a lens or lens element along the optical axis includes a piezoelectric body that generates dimensional distortion due to the piezoelectric longitudinal effect, and a transmission mechanism that magnifies the displacement of this piezoelectric body to generate displacement in a predetermined direction. and means for coupling the transmission mechanism to the lens or lens element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60257141A JPH0619485B2 (en) | 1985-11-15 | 1985-11-15 | Piezoelectric lens driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60257141A JPH0619485B2 (en) | 1985-11-15 | 1985-11-15 | Piezoelectric lens driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62116910A true JPS62116910A (en) | 1987-05-28 |
| JPH0619485B2 JPH0619485B2 (en) | 1994-03-16 |
Family
ID=17302283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60257141A Expired - Lifetime JPH0619485B2 (en) | 1985-11-15 | 1985-11-15 | Piezoelectric lens driving device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619485B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01198037A (en) * | 1988-02-03 | 1989-08-09 | Nec Corp | Wire clamp device |
| JPH03168610A (en) * | 1989-11-28 | 1991-07-22 | Matsushita Electric Ind Co Ltd | Optical deflector |
| JPH0758481A (en) * | 1993-08-13 | 1995-03-03 | Nec Corp | Semiconductor integrated circuit unit |
| EP1552679A2 (en) * | 2002-06-05 | 2005-07-13 | Nokia Corporation | Digital camera system with piezoelectric actuators |
| KR100638722B1 (en) | 2005-02-02 | 2006-10-30 | 삼성전기주식회사 | Device for Lens Transfer |
| JP2008096931A (en) * | 2006-10-16 | 2008-04-24 | Namiki Precision Jewel Co Ltd | Actuator |
| JP2008096932A (en) * | 2006-10-16 | 2008-04-24 | Namiki Precision Jewel Co Ltd | Lens actuator |
| JP2008203406A (en) * | 2007-02-19 | 2008-09-04 | Konica Minolta Opto Inc | Drive unit, imaging unit, and imaging apparatus |
| JP2008211864A (en) * | 2007-02-23 | 2008-09-11 | Konica Minolta Opto Inc | Driver, image pickup unit, and image pickup apparatus |
| WO2009128463A1 (en) * | 2008-04-15 | 2009-10-22 | 並木精密宝石株式会社 | Lens actuator |
| WO2009128464A1 (en) * | 2008-04-15 | 2009-10-22 | 並木精密宝石株式会社 | Displacement enlarging mechanism for lens actuator |
| JP2009258299A (en) * | 2008-04-15 | 2009-11-05 | Namiki Precision Jewel Co Ltd | Lens actuator using tilting type displacement enlarging mechanism |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51114940A (en) * | 1975-03-28 | 1976-10-09 | Geometric Data Corp | Fine focus adjustment device |
| JPS59177736A (en) * | 1983-03-25 | 1984-10-08 | Olympus Optical Co Ltd | Two-dimensional driving device |
-
1985
- 1985-11-15 JP JP60257141A patent/JPH0619485B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51114940A (en) * | 1975-03-28 | 1976-10-09 | Geometric Data Corp | Fine focus adjustment device |
| JPS59177736A (en) * | 1983-03-25 | 1984-10-08 | Olympus Optical Co Ltd | Two-dimensional driving device |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616519B2 (en) * | 1988-02-03 | 1994-03-02 | 日本電気株式会社 | Wire clamp device |
| JPH01198037A (en) * | 1988-02-03 | 1989-08-09 | Nec Corp | Wire clamp device |
| JPH03168610A (en) * | 1989-11-28 | 1991-07-22 | Matsushita Electric Ind Co Ltd | Optical deflector |
| JPH0758481A (en) * | 1993-08-13 | 1995-03-03 | Nec Corp | Semiconductor integrated circuit unit |
| EP1552679A4 (en) * | 2002-06-05 | 2009-08-26 | Nokia Corp | Digital camera system with piezoelectric actuators |
| EP1552679A2 (en) * | 2002-06-05 | 2005-07-13 | Nokia Corporation | Digital camera system with piezoelectric actuators |
| KR100638722B1 (en) | 2005-02-02 | 2006-10-30 | 삼성전기주식회사 | Device for Lens Transfer |
| JP2008096931A (en) * | 2006-10-16 | 2008-04-24 | Namiki Precision Jewel Co Ltd | Actuator |
| JP2008096932A (en) * | 2006-10-16 | 2008-04-24 | Namiki Precision Jewel Co Ltd | Lens actuator |
| JP2008203406A (en) * | 2007-02-19 | 2008-09-04 | Konica Minolta Opto Inc | Drive unit, imaging unit, and imaging apparatus |
| JP2008211864A (en) * | 2007-02-23 | 2008-09-11 | Konica Minolta Opto Inc | Driver, image pickup unit, and image pickup apparatus |
| WO2009128463A1 (en) * | 2008-04-15 | 2009-10-22 | 並木精密宝石株式会社 | Lens actuator |
| WO2009128464A1 (en) * | 2008-04-15 | 2009-10-22 | 並木精密宝石株式会社 | Displacement enlarging mechanism for lens actuator |
| JP2009258299A (en) * | 2008-04-15 | 2009-11-05 | Namiki Precision Jewel Co Ltd | Lens actuator using tilting type displacement enlarging mechanism |
| JP2009258300A (en) * | 2008-04-15 | 2009-11-05 | Namiki Precision Jewel Co Ltd | Lens actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0619485B2 (en) | 1994-03-16 |
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