JPH01197707A - Lens barrel driving device for optical instrument - Google Patents
Lens barrel driving device for optical instrumentInfo
- Publication number
- JPH01197707A JPH01197707A JP2246788A JP2246788A JPH01197707A JP H01197707 A JPH01197707 A JP H01197707A JP 2246788 A JP2246788 A JP 2246788A JP 2246788 A JP2246788 A JP 2246788A JP H01197707 A JPH01197707 A JP H01197707A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric
- movement
- lens barrel
- driving device
- bodies
- 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.)
- Pending
Links
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- 230000033001 locomotion Effects 0.000 claims abstract description 25
- 230000008602 contraction Effects 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 abstract description 14
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 9
- 239000012790 adhesive layer Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 241000256247 Spodoptera exigua Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- -1 silver halide Chemical class 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は光学機器用レンズ鏡胴駆動装置に関し、例えば
圧電部材を断回路「コ」字状弾性体の脚部間に挾持して
前記圧電部材の伸縮運動を該弾性体の脚間閉運動に変換
して、両脚部に圧接された被駆動体との摩擦及び脚部の
変位により駆動力を得る圧電アクチュエータを駆動源と
する光学機器用レンズ鏡胴駆動装置に関する。Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a lens barrel driving device for optical equipment. For optical equipment whose drive source is a piezoelectric actuator that converts the stretching motion of a member into a closing motion between the legs of the elastic body and obtains a driving force through friction with a driven body pressed against both legs and displacement of the legs. The present invention relates to a lens barrel driving device.
［従来の技術］
従来の銀塩カメラ、電子カメラ、ＶＴＲカメラなどの自
動焦点（ＡＦ）機構における鏡胴駆動源には、回転繰り
出し運動を行なうのに有利であるため、一般にステッピ
ングモータやギヤ減速された電磁モータ等が用いられて
いた。[Prior Art] The lens barrel drive source in the automatic focusing (AF) mechanism of conventional silver halide cameras, electronic cameras, VTR cameras, etc. generally uses a stepping motor or a gear reduction gear because it is advantageous for performing rotational movement. Electromagnetic motors, etc., were used.
しかし、電磁モータは電磁音が発生し、バックラッシュ
による位置のバラツキ等多くの問題点をかかえている。However, electromagnetic motors generate electromagnetic noise and have many problems such as positional variations due to backlash.
このため、最□近になってこの自動焦点機構に、トルク
が大きく、直接鏡胴の駆動ができる超音波モータが使わ
れつつある。For this reason, ultrasonic motors with large torque and capable of directly driving the lens barrel have recently been used in automatic focusing mechanisms.
しかし、一般に超音波モータは２相駆動の表面波モータ
（いわゆる進行波形の圧電モータ）が多く用いられてお
り、この方式においては、縦振動の定在波を進行波に変
えるため、圧電体の構成も複雑なものであり、またその
駆動方法も複雑なものであった。However, in general, two-phase driven surface wave motors (so-called traveling wave piezoelectric motors) are often used as ultrasonic motors. The structure was complicated, and the driving method was also complicated.
そして、この圧電モータは厚さ１００μｍ以上の圧電体
を用いているため、高い駆動電圧が必要であり、素子の
選定や、ノイズ対策をしなければならず、駆動回路構成
に問題があった。Since this piezoelectric motor uses a piezoelectric body with a thickness of 100 μm or more, a high drive voltage is required, and elements must be selected and noise countermeasures must be taken, which poses problems in the drive circuit configuration.
この従来の超音波モータの構成例を第４図に示す。An example of the configuration of this conventional ultrasonic motor is shown in FIG.
図中１はリング状の移動体（被駆動体）であり、移動体
１の下部には振動体３の駆動力を効率良く受は取るため
のライナ部材２が貼着されている・。In the figure, 1 is a ring-shaped moving body (driven body), and a liner member 2 is attached to the lower part of the moving body 1 to efficiently receive and take away the driving force of the vibrating body 3.
３は振幅増幅のためのスリット３ａの配設された、たわ
み振動を発生させる固定子（駆動体）としての振動体で
あり、燐青銅又は高圧力アルミ部材等で形成され、第４
図に符号３ａで示されている如く所定間隔で切り込みが
形成されており、各部分毎に独立に振動できるようにな
っている。Reference numeral 3 designates a vibrating body as a stator (driving body) for generating flexural vibration, which is provided with slits 3a for amplitude amplification, and is made of phosphor bronze or high-pressure aluminum material.
As shown by reference numeral 3a in the figure, cuts are formed at predetermined intervals, so that each part can vibrate independently.
４は圧電セラミックス５と振動体３とを固着するための
接着剤層、５は圧電セラミックである。そして、振動体
３とライナ一部材２（移動体１）とは強く圧接されてい
る。4 is an adhesive layer for fixing the piezoelectric ceramic 5 and the vibrating body 3, and 5 is a piezoelectric ceramic. The vibrating body 3 and the liner member 2 (moving body 1) are strongly pressed together.
この超音波モータの動作原理を説明する。The operating principle of this ultrasonic motor will be explained.
細長い圧電セラミックス５を交互に向きを反転して分極
させる。このとき、各圧電セラミックスは独立しており
、電圧を印加すると圧電セラミックス５が伸びる部分と
縮む部分とに分かれる。このため、振動体３にうねりが
生ずる。即ち、圧電セラミックス５が伸びた部分が谷と
なり、縮む部分が山となる。そして、圧電セラミックス
５への印加電圧極性を反転させるとたわみも反転する。The direction of the elongated piezoelectric ceramics 5 is alternately reversed and polarized. At this time, each piezoelectric ceramic is independent, and when a voltage is applied, the piezoelectric ceramic 5 is divided into an expanding part and a contracting part. For this reason, undulations occur in the vibrating body 3. That is, the portion where the piezoelectric ceramic 5 extends becomes a valley, and the portion where the piezoelectric ceramic 5 contracts becomes a peak. When the polarity of the voltage applied to the piezoelectric ceramic 5 is reversed, the deflection is also reversed.
このたわみ状態が縦振動する定在波を発生させる。This deflection state generates a standing wave that vibrates longitudinally.
この定在波のみではモータは回らず、縦振動（Ｚ方向）
しかしない定在波を用いて円周方向（Ｘ方向）への回転
方向を作り出すには（縦振動の定在波を進行波に変える
には）位置と位相がそれぞれ９０度ずつずれた２つの定
在波を発生させるよう圧電セラミックス５を２つに区分
し、λ／４（λは共振波長）だけずらして配置し、それ
ぞれに印加する電圧の位相も９０度ずつずらせばよい。The motor does not rotate with only this standing wave, but vertical vibration (Z direction)
However, in order to create a rotation direction in the circumferential direction (X direction) using a standing wave that does not exist (to change a standing wave of longitudinal vibration to a traveling wave), two In order to generate a standing wave, the piezoelectric ceramic 5 may be divided into two parts, which may be arranged so as to be shifted by λ/4 (λ is the resonant wavelength), and the phases of the voltages applied to each may be shifted by 90 degrees.
これにより、進行波の方向と反対に楕円振動が発生する
。そこで、移動体ｌを振動体３に強く圧接すると移動体
１と振動体３との間に発生する摩擦力で移動体ｌが進行
波の方向とは反対の方向に回転する。This causes elliptical vibration to occur in the opposite direction to the traveling wave. Therefore, when the movable body 1 is strongly pressed against the vibrating body 3, the frictional force generated between the movable body 1 and the vibrating body 3 causes the movable body 1 to rotate in a direction opposite to the direction of the traveling wave.
［発明が解決しようとする課題］
しかし、この超音波モータは２相駆動の表面波モータが
使用されており、例えばレンズ鏡胴駆動用のリング形状
とした場合には以下の如き欠点がある。[Problems to be Solved by the Invention] However, this ultrasonic motor uses a two-phase drive surface wave motor, and when it has a ring shape for driving a lens barrel, for example, it has the following drawbacks.
■必要なトルクを得るためには上述の如く圧電セラミッ
クスが厚くなり、駆動電圧も高くする必要があった（通
常Ｐ−Ｐ値６０Ｖ以上）。(2) In order to obtain the necessary torque, the piezoelectric ceramic must be made thicker as described above, and the driving voltage must also be increased (usually a P-P value of 60 V or more).
■２相の駆動回路が必要であり、駆動回路も複雑かつコ
スト高となってしまう。(2) A two-phase drive circuit is required, making the drive circuit complex and expensive.
■振動体３にはスリットを設けなければ十分な駆動力が
得られず、形状が複雑で加工も困難であった。(2) Unless a slit is provided in the vibrating body 3, sufficient driving force cannot be obtained, and the shape is complicated and processing is difficult.
■接着層を駆動電圧印加のための電気経路として使うた
め、効率が低下する。■Efficiency decreases because the adhesive layer is used as an electrical path for applying driving voltage.
［課題を解決するための手段］
本発明は上述の課題を解決することを目的として成され
たもので、上述の課題を解決する一手段として以下の構
成を備える。[Means for Solving the Problems] The present invention has been made for the purpose of solving the above-mentioned problems, and includes the following configuration as one means for solving the above-mentioned problems.
即ち、光学機器用のレンズ鏡胴を移動させて焦点調整或
はズーム調整を行なうための駆動源として、圧電部材を
弾性体の脚部間に挾持して前記圧電部材の伸縮運動を該
弾性体脚部の開閉運動に変換して駆動力を得る圧電アク
チュエータにより構成する。That is, as a driving source for moving a lens barrel for an optical device to perform focus adjustment or zoom adjustment, a piezoelectric member is held between the legs of an elastic body, and the expansion and contraction movement of the piezoelectric member is controlled by the elastic body. It consists of a piezoelectric actuator that converts the opening and closing movements of the legs into driving force.
［作用］
以上の構成において、低電圧駆動、かつ単相駆動である
ため、駆動回路を簡単なもので構成できる。[Operation] In the above configuration, since low voltage drive and single phase drive are used, the drive circuit can be configured with a simple one.
又、振動体は鏡胴の必要箇所にのみ構成すれば良く、加
工処理の簡略容易化、及び軽量化が図れる。In addition, the vibrating body need only be provided at the necessary locations on the lens barrel, making it possible to simplify processing and reduce the weight.
更に又、接着層を機械的結合機能にのみ用いることがで
き伝達効率向上が図れる。Furthermore, the adhesive layer can be used only for the mechanical bonding function, thereby improving transmission efficiency.
［実施例］
以下、図面を参照して本発明に係る一実施例を詳細に説
明する。[Example] Hereinafter, an example according to the present invention will be described in detail with reference to the drawings.
［第１実施例］
第１図（Ａ）は本発明に係る一実施例の上面図であり、
第１図（Ｂ）は本実施例の正面図である。[First embodiment] FIG. 1(A) is a top view of an embodiment according to the present invention,
FIG. 1(B) is a front view of this embodiment.
図中１１．２１は積層型のセラミック圧電体、１２ａ、
１２ｂ、２２ａ、２２ｂは圧電体１１゜２１を振動体１
３．２３の周内側に固着する接着層、１３．２３は断面
路コ字形の金属等の弾性体で形成された振動体、１４は
移動体１５に貼着されたライナ部材、１５は振動体１が
ライナ部材１４を介して圧接されたリング状の移動体で
あり、例えば移動体１５とヘリコーＣド構造で回転運動
を直進運動に変換する回転リングを接続することにより
、カメラの焦点機構が達成できる。この部分の構成は公
知であるため説明を省略する。In the figure, 11.21 is a laminated ceramic piezoelectric body, 12a,
12b, 22a, 22b connect the piezoelectric body 11°21 to the vibrating body 1
13.23 is a vibrating body formed of an elastic body such as a metal having a U-shaped cross section; 14 is a liner member stuck to the movable body 15; 15 is a vibrating body Reference numeral 1 denotes a ring-shaped movable body that is pressed through a liner member 14. For example, by connecting the movable body 15 with a rotating ring that converts rotational motion into linear motion using a helicoid C-shaped structure, the focusing mechanism of the camera can be adjusted. It can be achieved. Since the configuration of this part is well known, the explanation will be omitted.
そして積層型セラミック圧電体１１．２１に所定電圧を
印加すると該圧電体１１．２１が伸縮運動を起こす。こ
の圧電体１１．２１の両端部は接着ｔｉ１２ａ、１２ｂ
、２２ａ、２２ｂを介して振動体１３．２３の脚部１３
ａ、１３ｂ、及び２３ａ、２３ｂに固着されており、圧
電体１１゜２１の伸縮運動に従い該脚部１３ａ、１３ｂ
、及び２３ａ、２３ｂが曲げ運動を生じ、第２図矢印Ａ
、Ｂに示す如く基部を支点として脚部開閉運動を生ずる
。When a predetermined voltage is applied to the laminated ceramic piezoelectric body 11.21, the piezoelectric body 11.21 causes an expansion and contraction movement. Both ends of this piezoelectric body 11.21 are bonded ti12a, 12b.
, 22a, 22b to the leg 13 of the vibrating body 13.23.
a, 13b, and 23a, 23b, and the legs 13a, 13b move as the piezoelectric body 11°21 expands and contracts.
, and 23a, 23b cause bending motion, as shown by arrow A in FIG.
, B, the legs open and close using the base as a fulcrum.
振動体１３．２３の脚部１３ａ、１３ｂ、及び２３ａ、
２３ｂはその長さに若干の差があり、第２図に示す如く
移動体１５に対し一部のみ接触する構成となっている。Legs 13a, 13b, and 23a of vibrating body 13.23,
23b has a slight difference in length, and is configured to only partially contact the movable body 15 as shown in FIG.
このため、振動体１３゜２３を移動体１５に所定圧力で
圧接させ、圧電体１１．２１に電圧を印加すると、該振
動体１３゜２３の脚部は第２図矢印Ａ、Ｂに示す如＜１
３位置と１３′位置とを往復運動していわゆる尺取虫運
動を生ずる。これにより、移動体１５はこの脚部１３ａ
、１３ｂ、及び２３ａ、２３ｂとの接触部の摩擦効果で
第２図の矢印Ｃ方向に移動する。Therefore, when the vibrating body 13.23 is brought into pressure contact with the movable body 15 at a predetermined pressure and a voltage is applied to the piezoelectric body 11.21, the legs of the vibrating body 13.23 move as shown by arrows A and B in FIG. <1
The so-called inchworm movement is produced by reciprocating between the 3rd position and the 13' position. As a result, the movable body 15
, 13b, and 23a, 23b, it moves in the direction of arrow C in FIG.
なお、第１図（Ｂ）に示す如く脚部１３ａ。In addition, as shown in FIG. 1(B), the leg portion 13a.
１３ｂと脚部２３ａ、２３ｂとはその脚の長さが互いに
逆になるよう構成されており、振動体１３と圧電体１１
で構成される固定子部は移動体１５を時計方向に、振動
体２３と圧電体２１で構成される固定子部は移動体１５
を反時計方向に回転させる構成となっている。従って、
移動体１５の回転方向の選択により圧電体１１又は圧電
体２１のどちらかに駆動電圧を印加すれば良い。即ち、
高周波電圧を連続的に印加することにより、圧電体１１
又は圧電体２１は連続的に伸縮運動を起こし、移動体１
５は連続的に回転運動する。13b and the legs 23a, 23b are configured such that their leg lengths are opposite to each other, and the vibrating body 13 and the piezoelectric body 11
The stator section consisting of the vibrating body 23 and the piezoelectric body 21 moves the movable body 15 clockwise.
It is configured to rotate counterclockwise. Therefore,
The driving voltage may be applied to either the piezoelectric body 11 or the piezoelectric body 21 by selecting the rotation direction of the moving body 15. That is,
By continuously applying a high frequency voltage, the piezoelectric body 11
Or the piezoelectric body 21 causes continuous expansion and contraction movement, and the moving body 1
5 rotates continuously.
また、脚の長さに差を付ける代りに、脚先端を第１図（
Ｂ）に示す様に斜めにカットすることによっても、駆動
力に方向性を与えることができる。Also, instead of making a difference in the length of the legs, the tips of the legs can be adjusted as shown in Figure 1 (
Directionality can also be given to the driving force by cutting diagonally as shown in B).
更に、脚の長さの差と脚先端カットを組み合わせてもよ
い。Furthermore, the difference in leg length and the leg tip cut may be combined.
なお、この圧電体と振動体より構成される固定子は、上
述の２個に限定されるものではなく、必要に応じて任意
の数だけ配置してよい。さらに、脚部１３ａ、１３ｂ、
及び２３ａ、２３ｂは、必ず反対方向に変位する必要が
あるが、この脚部をそれぞれ複数に分割した構成として
もよい。Note that the number of stators composed of the piezoelectric body and the vibrating body is not limited to the two described above, and any number of stators may be arranged as necessary. Furthermore, the legs 13a, 13b,
, and 23a and 23b must be displaced in opposite directions, but each leg may be divided into a plurality of parts.
［第２実施例］
以上の説明は移動体１５を回転運動させ、例えば移動体
１５とへリコイド構造で回転運動を直進運動に変換する
回転リングを接続することにより、カメラの自動焦点機
構を構成する例について説明したが、本発明は以上の例
に限るものではなく、圧電体と振動体とで構成される固
定子により直接レンズ鏡胴を直進駆動する構成とするこ
ともできる。[Second Embodiment] In the above description, an automatic focusing mechanism of a camera is constructed by rotating the moving body 15 and connecting the moving body 15 with a rotating ring that converts the rotational motion into linear motion using a helicoid structure, for example. Although an example has been described in which the present invention is not limited to the above example, it is also possible to adopt a structure in which the lens barrel is directly driven in a straight line by a stator composed of a piezoelectric body and a vibrating body.
このように構成した例を第３図に示す。An example of such a configuration is shown in FIG.
図中、３０は凹レンズ３７の取り付けられた内部レンズ
鏡胴、３１は外部レンズ鏡胴３４を突出方向に移動させ
るための第１図に示す振動体と圧電体より構成される固
定子、３２は同様の外部レンズ鏡胴３４を内部に引き込
む如く駆動する固定子、３３はレンズ鏡胴外部ケース、
３４は凸レンズ３５の取り付けられた外部鏡胴である。In the figure, 30 is an inner lens barrel to which a concave lens 37 is attached, 31 is a stator composed of the vibrating body and piezoelectric body shown in FIG. 1 for moving the outer lens barrel 34 in the projecting direction, and 32 is a stator that A stator that drives a similar external lens barrel 34 to draw it into the interior; 33 is a lens barrel external case;
34 is an external lens barrel to which a convex lens 35 is attached.
図示の如く外部レンズ鏡胴３４に圧接された固定子３１
．３２に駆動電圧を印加することにより、直接外部レン
ズ鏡胴３４を直進駆動することができる。なお、固定子
数は図示の２個に限るものではなく、外部レンズ鏡胴３
４の引き込み用、突出用にそれぞれ任意の数の固定子を
配設すればよい。A stator 31 is pressed against an external lens barrel 34 as shown in the figure.
．． By applying a driving voltage to 32, it is possible to directly drive the external lens barrel 34 in a straight line. Note that the number of stators is not limited to two as shown in the figure;
An arbitrary number of stators may be provided for each of the retracting and protruding stators.
又、以上の説明は自動焦点機構について行なったが、本
機構をズーム機構に採用しても同様の効果かえられる。Further, although the above explanation has been made regarding an automatic focusing mechanism, the same effect can be obtained even if this mechanism is adopted as a zoom mechanism.
以上説明した如く本実施例によれば、固定子の振動体の
脚部の開閉運動（尺取虫運動）によって移動体の運動が
直接被駆動系に伝達され、効率のよい、構造の簡単な自
動焦点機構帛ズーム機構とすることができる。又、圧電
体も薄い圧電体の積層構造とし、積層方向変位を使うよ
うにすることにより、低い駆動電圧（約２〜５Ｖ）で変
位発生力を十分大きくすることができる。As explained above, according to this embodiment, the movement of the moving body is directly transmitted to the driven system by the opening/closing movement (inchworm movement) of the legs of the vibrating body of the stator, resulting in an efficient automatic focusing system with a simple structure. The mechanism can be a zoom mechanism. Furthermore, by using a laminated structure of thin piezoelectric bodies and using displacement in the lamination direction, the displacement generating force can be made sufficiently large with a low driving voltage (approximately 2 to 5 V).
又、接着層を電気経路として使用しないため、電圧の低
下も発生しない。Furthermore, since the adhesive layer is not used as an electrical path, no voltage drop occurs.
なお、上述の説明では駆動体（圧電素子）を固定子とし
て、被駆動体（移動子）を動かす例を示したが、被駆動
体が固定されており、駆動体が移動するものであっても
本発明の範囲に含まれ、本発明の一態様に含まれるもの
である。Note that in the above explanation, an example was given in which the driving body (piezoelectric element) is used as a stator and the driven body (mover) is moved, but the driven body is fixed and the driving body is movable. It is also included within the scope of the present invention and is included in one embodiment of the present invention.
［発明の効果コ
以上説明した様に本発明によれば、簡単な構造でしかも
駆動電圧も低く、効率もよい光学機器用レンズ鏡胴駆動
装置が提供できる。[Effects of the Invention] As described above, according to the present invention, it is possible to provide a lens barrel drive device for optical equipment that has a simple structure, has a low driving voltage, and is highly efficient.
【図面の簡単な説明】
第１図（Ａ）は本発明に係る第１実施例の上面図、
第１図（Ｂ）は第１実施例の正面−１
第２図は本実施例の振動体脚部の変位及び移動体移動方
向を示す図、
第３図は本発明に係る第２実施例のレンズ鏡胴の断面図
、
第４図は従来の超音波モータの断面図である。
図中、１．１５．・・・移動体、２．１４・・・ライナ
部材、３，１３．２３・・・振動体、４，１２ａ。
１２ｂ、２２ａ、２２ｂ−・・接着層、５・・・圧電セ
ラミックス、１１．２１・・・圧電体、１３ａ。
１３ｂ、２３ａ、２３ｂ−振動体脚部、３０ ・・・内
部レンズ鏡胴、３１．３２・・・固定子、３３・・・レ
ンズ鏡胴ケース、３４・・・内部レンズ鏡胴、３５・・
・凸レンズ、３７・・・凹レンズである。[Brief Description of the Drawings] Fig. 1(A) is a top view of the first embodiment according to the present invention, Fig. 1(B) is a front view of the first embodiment, Fig. 2 is a vibration of the present embodiment. FIG. 3 is a sectional view of a lens barrel according to a second embodiment of the present invention; FIG. 4 is a sectional view of a conventional ultrasonic motor. In the figure, 1.15. ... Moving body, 2.14... Liner member, 3, 13.23... Vibrating body, 4, 12a. 12b, 22a, 22b--Adhesive layer, 5...Piezoelectric ceramics, 11.21...Piezoelectric body, 13a. 13b, 23a, 23b - Vibrating body legs, 30... Internal lens barrel, 31. 32... Stator, 33... Lens barrel case, 34... Internal lens barrel, 35...
- Convex lens, 37... Concave lens.
Claims (2)
はズーム調整を行なうための駆動源を圧電部材を弾性体
の脚部間に挾持して前記圧電部材の伸縮運動を該弾性体
脚部の開閉運動に変換して駆動力を得る圧電アクチュエ
ータとすることを特徴とする光学機器用レンズ鏡胴駆動
装置。(1) A piezoelectric member is sandwiched between the legs of an elastic body to provide a driving source for moving a lens barrel for an optical device to perform focus adjustment or zoom adjustment, and the expansion and contraction movement of the piezoelectric member is controlled by the elastic body. A lens barrel drive device for optical equipment, characterized in that it is a piezoelectric actuator that obtains driving force by converting the opening/closing movement of the legs.
レンズ鏡胴を互いに逆方向に駆動することを特徴とする
請求項１記載の光学機器用レンズ鏡胴駆動装置。(2) At least two piezoelectric actuators are provided,
2. The lens barrel driving device for optical equipment according to claim 1, wherein the lens barrels are driven in mutually opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2246788A JPH01197707A (en) | 1988-02-02 | 1988-02-02 | Lens barrel driving device for optical instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2246788A JPH01197707A (en) | 1988-02-02 | 1988-02-02 | Lens barrel driving device for optical instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01197707A true JPH01197707A (en) | 1989-08-09 |
Family
ID=12083513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2246788A Pending JPH01197707A (en) | 1988-02-02 | 1988-02-02 | Lens barrel driving device for optical instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01197707A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04163431A (en) * | 1990-10-26 | 1992-06-09 | Minolta Camera Co Ltd | Lens driving mechanism of camera |
| JPH04212911A (en) * | 1990-12-06 | 1992-08-04 | Canon Inc | Apparatus with built-in lens |
| DE102004060785A1 (en) * | 2004-09-02 | 2006-03-09 | Samsung Electro-Mechanics Co.Ltd., Suwon | Lens positioning device used in digital camera, includes positioning unit having holder with lens, contacting rotation plate when rotation plate is rotated so that positioning unit is linearly moved with respect to optical axis of lens |
-
1988
- 1988-02-02 JP JP2246788A patent/JPH01197707A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04163431A (en) * | 1990-10-26 | 1992-06-09 | Minolta Camera Co Ltd | Lens driving mechanism of camera |
| JPH04212911A (en) * | 1990-12-06 | 1992-08-04 | Canon Inc | Apparatus with built-in lens |
| DE102004060785A1 (en) * | 2004-09-02 | 2006-03-09 | Samsung Electro-Mechanics Co.Ltd., Suwon | Lens positioning device used in digital camera, includes positioning unit having holder with lens, contacting rotation plate when rotation plate is rotated so that positioning unit is linearly moved with respect to optical axis of lens |
| DE102004060785B4 (en) * | 2004-09-02 | 2007-07-12 | Samsung Electro-Mechanics Co.Ltd., Suwon | Lens positioning device for a camera module |
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