JP2652536B2 - Rotary drive - Google Patents
Rotary driveInfo
- Publication number
- JP2652536B2 JP2652536B2 JP62138394A JP13839487A JP2652536B2 JP 2652536 B2 JP2652536 B2 JP 2652536B2 JP 62138394 A JP62138394 A JP 62138394A JP 13839487 A JP13839487 A JP 13839487A JP 2652536 B2 JP2652536 B2 JP 2652536B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- piezoelectric
- vibrating body
- laminate
- circumferential surface
- 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
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Lens Barrels (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、カメラレンズを回転駆動する等、ロータの
回転源となる回転駆動体に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a rotary driving body serving as a rotation source of a rotor, for example, for driving a camera lens to rotate.
＜従来技術＞ カメラレンズ等を回転駆動するには、従来は、ロータ
（被回動体）周縁に歯車を形成し、該歯車にモータの駆
動軸に連係する歯車を噛み合わせて、送り駆動する構成
により施していた。<Prior Art> Conventionally, in order to rotationally drive a camera lens or the like, a gear is formed on the periphery of a rotor (a body to be rotated), and the gear is meshed with a gear linked to a drive shaft of a motor to feed and drive. It was given by.
＜発明が解決しようとする問題点＞ ところで、かかる構成にあっては、所要の回転速度を
達成するために複数の歯車を要して、部品点数が多くな
り、構造が複雑化したり、装置が大型化する。また、そ
の回転方向の変更や、回転力または回転数の変更を可能
とするためには、複雑な機構を要する等の欠点があっ
た。<Problems to be Solved by the Invention> By the way, in such a configuration, a plurality of gears are required to achieve a required rotation speed, the number of parts increases, the structure becomes complicated, and the device is Increase in size. In addition, there is a drawback that a complicated mechanism is required to enable the change of the rotation direction and the change of the rotation force or the number of rotations.
本発明は、構造が簡単で、しかも駆動制御が容易な回
転駆動体の提供を目的とするものである。An object of the present invention is to provide a rotary driving body having a simple structure and easy driving control.
＜問題点を解決するための手段＞ 本発明は、ロータの円周面に沿って配設され、かつ周
方向に伸縮する円弧状振動体の、その中央部を固定し、
その両端に前記ロータの円周面に圧接する圧電積層体を
配設するとともに、両圧電積層体に、前記振動体の伸縮
と同期して伸縮作動を生じ、しかも両圧電積層体相互は
逆伸縮タイミングとなる電圧制御を施したことを特徴と
するものである。<Means for Solving the Problems> According to the present invention, a central part of an arc-shaped vibrating body arranged along a circumferential surface of a rotor and extending and contracting in a circumferential direction is fixed,
At both ends, a piezoelectric laminate that is in pressure contact with the circumferential surface of the rotor is disposed, and both piezoelectric laminates expand and contract in synchronization with the expansion and contraction of the vibrating body, and the two piezoelectric laminates mutually reverse expand and contract. It is characterized in that timing voltage control is performed.
＜作用＞ 振動体がロータの円周に沿って伸張すると、振動体の
中央部は固定されているから、両端部が外方へ微伸出す
る。このとき、例えば左端の圧電積層体が伸張して、ロ
ータの円周面に圧接するとともに、右端の圧電積層体が
収縮していると、伸張側の左端の圧電積層体を介して振
動体がロータに連係し、該振動体の円周方向に沿った伸
張に伴って、ロータの送り駆動がなされ、ロータは、時
計方向回転する。<Operation> When the vibrating body extends along the circumference of the rotor, both ends are slightly extended outward since the central portion of the vibrating body is fixed. At this time, for example, when the leftmost piezoelectric laminate expands and presses against the circumferential surface of the rotor, and the rightmost piezoelectric laminate contracts, the vibrating body moves through the leftmost piezoelectric laminate on the extension side. In conjunction with the rotor, the rotor is driven to feed in accordance with the extension of the vibrating body in the circumferential direction, and the rotor rotates clockwise.
次に、左端の圧電積層体が収縮して、ロータとの連係
が解除されると共に、右端の圧電積層体が伸張してロー
タと連係する。そしてこの状態で、振動体がロータの円
周方向に沿って収縮して両端が内側へ移動すると、これ
に伴って、伸張側の右端の圧電積層体を介して、ロータ
は時計方向回転する。而て、振動体の伸張にともない、
ロータの時計方向回転が連続して生ずる。Next, the leftmost piezoelectric laminate contracts to release the link with the rotor, and the rightmost piezoelectric laminate expands to link with the rotor. Then, in this state, when the vibrating body contracts in the circumferential direction of the rotor and both ends move inward, the rotor rotates clockwise through the rightmost piezoelectric laminate on the extension side. Thus, with the extension of the vibrating body,
Clockwise rotation of the rotor occurs continuously.
また、ロータを反時計方向に回転させる場合には、左
右の圧電積層体の伸縮タイミングを振動体の伸縮タイミ
ングに対応して反転させればよい。When rotating the rotor in the counterclockwise direction, the expansion and contraction timing of the left and right piezoelectric laminates may be reversed in accordance with the expansion and contraction timing of the vibrator.
＜実施例＞ 添付図面について本発明の一実施例を説明する。An embodiment of the present invention will be described with reference to the accompanying drawings.
１は、カメラレンズ等のロータｘの円周面ｙに沿って
配設された本発明の回転駆動体であって、その振動体２
は、前記円周面ｙに倣った曲率を有している。Reference numeral 1 denotes a rotary driving body of the present invention disposed along a circumferential surface y of a rotor x such as a camera lens, and the vibrating body 2
Has a curvature following the circumferential surface y.
前記振動体２の構成について説明すると、合成樹脂材
料等の伸縮性のある材料で形成され、その中心に形成さ
れた透孔４には、ロータｘの外方にに設けられた固定部
ｚに螺合した連結ピン３が挿通し、該連結ピン３の外周
で、固定部ｚと、振動体２の下面間に発条５が装着さ
れ、振動体２を円周面ｙ側に付勢するようにしている。The configuration of the vibrating body 2 will be described. The vibrating body 2 is formed of an elastic material such as a synthetic resin material, and a through hole 4 formed at the center thereof has a fixing portion z provided outside the rotor x. The connection pin 3 is screwed into the connection pin 3, and on the outer periphery of the connection pin 3, the spring 5 is attached between the fixed portion z and the lower surface of the vibrating body 2, and urges the vibrating body 2 toward the circumferential surface y. I have to.
前記振動体２の中央部にあって、その両側面に薄板状
圧電素子板6,6が貼着されている。前記圧電素子板6,6は
第３図矢線で示すように厚み方向に分極され、該分極方
向に沿った電圧が印加されることにより厚み方向に膨張
し、これに伴ってポアソン比の関係で周方向に収縮す
る。At the center of the vibrating body 2, thin piezoelectric element plates 6, 6 are adhered to both side surfaces thereof. The piezoelectric element plates 6, 6 are polarized in the thickness direction as shown by the arrows in FIG. 3, and expand in the thickness direction when a voltage along the polarization direction is applied. To shrink in the circumferential direction.
また前記振動体２の両端には、厚み方向に分極された
複数の圧電素子板を積層し、各圧電素子板を電気的並列
に配電してなる圧電積層体10a,10bが、その積層方向を
径方向に一致して固定されている。At both ends of the vibrating body 2, a plurality of piezoelectric element plates polarized in the thickness direction are laminated, and piezoelectric laminates 10a and 10b formed by electrically distributing the respective piezoelectric element plates in parallel are arranged in the laminating direction. It is fixed in the radial direction.
前記構成にあって、ロータｘを第２図矢線のように時
計方向に回動するためには、圧電素子板6,6にE1 sin ω
ｔの交番電圧を印加したとすると、圧電積層体10aにはE
2 cos ωｔ、圧電積層体10bにはE2 sin ωｔのサイクル
の電圧を夫々印加する。In the above configuration, in order to rotate the rotor x clockwise as indicated by the arrow in FIG. 2, E 1 sin ω is applied to the piezoelectric element plates 6 and 6.
When an alternating voltage of t is applied, the piezoelectric laminate 10a has E
2 cos ωt and a voltage of a cycle of E 2 sin ωt are applied to the piezoelectric laminate 10b.
これにより、前記圧電素子板6,6が周方向に収縮し
て、振動体２の両端が、連結ピン３を中心にして内方へ
微移動するとき、圧電積層体10aは収縮状態となり、圧
電積層体10bは伸張状態となる。このため、発条５の付
勢力により円周面ｙに圧接しているから、圧電積層体10
bのある振動体２の図中右端部の内側移動が、ロータｘ
の周面に圧接している圧電積層体10bを介してロータｘ
に伝達され、該ロータｘが送り移動される。一方、この
とき図中左端部の圧電積層体10aは収縮状態にあり、ロ
ータｘの周面に圧接していないから、ロータｘに駆動力
が伝達されない。As a result, when the piezoelectric element plates 6 and 6 contract in the circumferential direction and both ends of the vibrating body 2 slightly move inward around the connection pin 3, the piezoelectric laminate 10a is in a contracted state, The laminate 10b is in an expanded state. For this reason, the piezoelectric laminate 10 is pressed against the circumferential surface y by the urging force of the ridge 5.
The inside movement of the right end in the figure of the vibrating body 2 with b is the rotor x
Rotor x through the piezoelectric laminate 10b pressed against the peripheral surface of the rotor x
And the rotor x is fed and moved. On the other hand, at this time, the piezoelectric laminate 10a at the left end in the drawing is in a contracted state and is not pressed against the peripheral surface of the rotor x, so that no driving force is transmitted to the rotor x.
また、圧電素子板6,6が周方向に伸張して、その両端
が、連結ピン３を中心にして外方へ微移動するとき、圧
電積層体10aは伸張状態となり、圧電積層体10bは収縮状
態となる。このため、振動体２の左側の端部の移動が、
ロータｘの周面に圧接している左側の圧電積層体10aを
介してロータｘに作用する。一方、このとき図中右端部
の圧電積層体10bは収縮状態にあり、ロータｘの周面に
圧接していないから、ロータｘに駆動力が伝達されな
い。When the piezoelectric element plates 6 and 6 expand in the circumferential direction and both ends slightly move outward with the connection pin 3 as a center, the piezoelectric laminate 10a is in an expanded state, and the piezoelectric laminate 10b is contracted. State. Therefore, the movement of the left end of the vibrating body 2
It acts on the rotor x via the left piezoelectric laminate 10a in pressure contact with the peripheral surface of the rotor x. On the other hand, at this time, the piezoelectric laminate 10b at the right end in the drawing is in a contracted state and is not pressed against the peripheral surface of the rotor x, so that no driving force is transmitted to the rotor x.
而て、振動体２の伸縮にともない、ロータｘは、圧電
積層体10a,10bにより、常に時計方向への回動を受ける
こととなり、矢線のように、該時計方向へ連続回転す
る。As the vibrating body 2 expands and contracts, the rotor x is constantly rotated clockwise by the piezoelectric laminates 10a and 10b, and continuously rotates clockwise as indicated by arrows.
ロータｘを反時計方向へ回転させる場合には、圧電積
層体10a,10bの印加タイミングを逆転させ、圧電積層体1
0aにはE2 sin ωｔ、圧電積層体10bにはE2 cos ωｔの
サイクルの電圧を夫々印加すればよい。When rotating the rotor x in the counterclockwise direction, the application timing of the piezoelectric laminates 10a and 10b is reversed, and the piezoelectric laminate 1
A voltage of E 2 sin ωt may be applied to 0a, and a voltage of E 2 cos ωt may be applied to the piezoelectric laminate 10b.
前記実施例にあって、振動体２の伸縮は、圧電素子板
6,6による外に、圧電積層体を周方向に配設する等種々
の構成を提案し得る。In the above embodiment, the expansion and contraction of the vibrating body 2 is caused by the piezoelectric element plate.
Various configurations other than those described in 6, 6 can be proposed, such as arranging the piezoelectric laminate in the circumferential direction.
前記した圧電素子板6,6と圧電積層体10a,10bとの電圧
制御にあって、交流電源を使用するほか、直流電源をス
イッチング機構を介して交番電圧を発生させることがで
きる。また電圧は正弦波のほか、矩形波を適用すること
もでき、この場合には、圧電積層体10a,10bの伸縮変換
が機敏になされ得て、一サイクルの送り駆動力が向上す
る。In controlling the voltage between the piezoelectric element plates 6, 6 and the piezoelectric laminates 10a, 10b, an AC power source can be used, and a DC power source can generate an alternating voltage via a switching mechanism. In addition to a sine wave, a rectangular wave can be applied as the voltage. In this case, the expansion and contraction conversion of the piezoelectric laminates 10a and 10b can be performed promptly, and the feed driving force in one cycle is improved.
＜発明の効果＞ 本発明は、上述のように、振動体２の両側に圧電積層
体10a,10bを設けて、振動体２と圧電積層体10a,10bの伸
縮タイミングを調整することによりロータｘの駆動を可
能としたものであるから、歯車等を用いるのと異なり、
構造が簡単で、小型化ができる。しかも、タイミング変
換により、ロータｘの回動方向を調整でき、電圧制御に
より駆動力を調整できる等、その制御が容易である等の
優れた効果がある。<Effects of the Invention> As described above, the present invention provides the rotor x by providing the piezoelectric laminates 10a and 10b on both sides of the vibrator 2 and adjusting the expansion and contraction timing of the vibrator 2 and the piezoelectric laminates 10a and 10b. Is different from using gears, etc.
The structure is simple and the size can be reduced. In addition, there are excellent effects such that the rotation direction of the rotor x can be adjusted by the timing conversion and the driving force can be adjusted by the voltage control, and the control is easy.
添付図面は本発明の実施例を示し、第１図は平面図、第
２図は回転駆動体１の一部切欠拡大平面図、第３図は同
背面図である。 x;ロータ、y;円周面、z;固定部、1;回転駆動体、2;振動
体、3;連結ピン、5;発条、6,6;圧電素子板、10a,10b;圧
電積層体1 is a plan view, FIG. 2 is a partially cut-away enlarged plan view of a rotary driving body 1, and FIG. 3 is a rear view of the same. x; rotor, y; circumferential surface, z; fixed part, 1; rotary driver, 2; vibrating body, 3; connecting pin, 5; spring, 6, 6; piezoelectric element plate, 10a, 10b; piezoelectric laminate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 黒澤 実 神奈川県横浜市緑区すすき野１丁目６− 11 (72)発明者 増田 道幸 愛知県名古屋市瑞穂区高辻町14番18号 日本特殊陶業株式会社内 (56)参考文献 特開 昭61−88771（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Minoru Kurosawa 1-6-11 Susukino, Midori-ku, Yokohama-shi, Kanagawa Prefecture (72) Michiyuki Masuda 14-18 Takatsuji-cho, Mizuho-ku, Nagoya-shi, Aichi Japan Nippon Special Ceramics Co., Ltd. (56) References JP-A-61-88771 (JP, A)
Claims (1)
方向に伸縮する円弧状振動体の、その中央部を固定し、
その両端に前記ロータの円周面に圧接する圧電積層体を
配設するとともに、両圧電積層体に、前記振動体の伸縮
と同期して伸縮作動を生じ、しかも両圧電積層体相互は
逆伸縮タイミングとなる電圧制御を施したことを特徴と
する回転駆動体。An arc-shaped vibrating body arranged along a circumferential surface of a rotor and extending and contracting in a circumferential direction, fixing a central portion thereof;
At both ends, a piezoelectric laminate that is in pressure contact with the circumferential surface of the rotor is disposed, and both piezoelectric laminates expand and contract in synchronization with the expansion and contraction of the vibrating body, and the two piezoelectric laminates mutually reverse expand and contract. A rotary driving body characterized in that a timing voltage control is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62138394A JP2652536B2 (en) | 1987-06-02 | 1987-06-02 | Rotary drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62138394A JP2652536B2 (en) | 1987-06-02 | 1987-06-02 | Rotary drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63301913A JPS63301913A (en) | 1988-12-08 |
| JP2652536B2 true JP2652536B2 (en) | 1997-09-10 |
Family
ID=15220920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62138394A Expired - Fee Related JP2652536B2 (en) | 1987-06-02 | 1987-06-02 | Rotary drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2652536B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5385804A (en) * | 1992-08-20 | 1995-01-31 | International Business Machines Corporation | Silicon containing negative resist for DUV, I-line or E-beam lithography comprising an aromatic azide side group in the polysilsesquioxane polymer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6188771A (en) * | 1984-10-03 | 1986-05-07 | Nec Corp | Rotary drive device |
-
1987
- 1987-06-02 JP JP62138394A patent/JP2652536B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63301913A (en) | 1988-12-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
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| LAPS | Cancellation because of no payment of annual fees |