JPH0270277A - Ultrasonic motor - Google Patents
Ultrasonic motorInfo
- Publication number
- JPH0270277A JPH0270277A JP63220936A JP22093688A JPH0270277A JP H0270277 A JPH0270277 A JP H0270277A JP 63220936 A JP63220936 A JP 63220936A JP 22093688 A JP22093688 A JP 22093688A JP H0270277 A JPH0270277 A JP H0270277A
- Authority
- JP
- Japan
- Prior art keywords
- vibrating body
- vibrating
- vibration mode
- bending vibration
- vibrator
- 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
- 238000005452 bending Methods 0.000 claims description 32
- 239000002783 friction material Substances 0.000 abstract description 6
- 230000010355 oscillation Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000005684 electric field Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
Landscapes
- 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
本発明は圧電体を用いて駆動力を発生する超音波モータ
に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ultrasonic motor that generates driving force using a piezoelectric material.
従来の技術
近年圧電セラミック等の圧電体を用いた振動体に弾性振
動を励振し、これを駆動力とした超音波モータが注目さ
れている。2. Description of the Related Art In recent years, ultrasonic motors have attracted attention, in which elastic vibrations are excited in a vibrating body using a piezoelectric material such as a piezoelectric ceramic, and this vibration is used as a driving force.
以下、図面を参照しながら超音波モータの従来技術につ
いて説明を行う。Hereinafter, the conventional technology of an ultrasonic motor will be explained with reference to the drawings.
第８図は、円環形超音波モータの切り欠き斜視図であり
、円環形の弾性体１の円環面の一方に圧電体として円環
形圧電セラミック２を貼合せて振動体３を構成している
。４は耐出耗性材料の摩擦材、５は弾性体であり、互い
に貼合せられて移動体６を構成している。移動体６は摩
擦材４を介して振動体３と接触している。圧電体２に交
流電界を印加して、振動体３に、径方向１次・周方向３
次以上の撓み振動の進行波を励振する。進行波の波頭の
横方向成分により、移動体６は駆動され回転運動をする
。FIG. 8 is a cutaway perspective view of a toroidal ultrasonic motor, in which a vibrating body 3 is constructed by laminating a toroidal piezoelectric ceramic 2 as a piezoelectric body to one of the toric surfaces of a toroidal elastic body 1. There is. Reference numeral 4 indicates a friction material made of wear-resistant material, and reference numeral 5 indicates an elastic body, which are pasted together to form a moving body 6. The moving body 6 is in contact with the vibrating body 3 via the friction material 4. An alternating current electric field is applied to the piezoelectric body 2, and the vibrating body 3 has a primary radial direction and a circumferential direction 3.
Excite traveling waves of bending vibrations of: The moving body 6 is driven by the lateral component of the wave crest of the traveling wave and performs rotational motion.
第９図は、円板形超音波モータの切り欠き斜視図であり
、円板形の弾性体７の円板面の一方円板形圧電体８を貼
合せて振動体９を構成している。FIG. 9 is a cutaway perspective view of a disk-shaped ultrasonic motor, in which a disk-shaped piezoelectric material 8 is bonded to one side of the disk surface of a disk-shaped elastic body 7 to constitute a vibrating body 9. .
１０は摩擦材、１１は弾性体であり、互いに貼合せられ
て移動体１２を構成している。移動体１２は摩擦材１０
を介して振動体９と接触している。10 is a friction material, and 11 is an elastic body, which are pasted together to form a moving body 12. The moving body 12 is a friction material 10
It is in contact with the vibrating body 9 via.
圧電体８に交流電界を印加して、振動体９に、径方向２
次・周方向３次以上の撓み振動の進行波を励振する。進
行波の波頭の横方向成分により、移動体６は駆動され回
転軸１３を中心にして回転運動をする。An alternating current electric field is applied to the piezoelectric body 8 to cause the vibrating body 9 to move in the radial direction 2.
Excite traveling waves of third-order or higher-order bending vibrations in the circumferential direction. The moving body 6 is driven by the lateral component of the wave crest of the traveling wave and performs rotational motion about the rotation axis 13 .
第１０図は、振動体に励振された撓み振動の進行波によ
り、移動体が駆動される原理を示す説明図である。振動
体１４の表面の任意のＡ点は、撓み振動の進行波の励振
によって、長軸２Ｗ、短軸２ｕの楕円運動をする。振動
体１４上に加圧して設置された移動体１５は、楕円軌跡
の頂点近傍で接触することにより、摩擦力により波の進
行方向とは逆方向に運動する。従って、移動体１５の速
度は、上記の進行波の波頭の横方向成分によって決まり
、出力トルクは振動体と移動体の間の摩擦力によって決
まる。FIG. 10 is an explanatory diagram showing the principle in which a moving body is driven by a traveling wave of bending vibration excited in a vibrating body. An arbitrary point A on the surface of the vibrating body 14 moves in an ellipse with a major axis 2W and a minor axis 2u due to the excitation of the traveling wave of bending vibration. The movable body 15 placed under pressure on the vibrating body 14 comes into contact with the vibrating body 14 near the apex of the elliptical locus, and thereby moves in a direction opposite to the direction of wave propagation due to frictional force. Therefore, the speed of the moving body 15 is determined by the lateral component of the wave crest of the traveling wave, and the output torque is determined by the frictional force between the vibrating body and the moving body.
発明が解決しようとする課題
以上、説明した従来の超音波モータは、振動体の！ｆｆ
ｉが小さく、従って振動エネルギーが小さいので、出力
が小さいという課題があった。また、円環型超音波モー
タの振動体は、進行波のため振動の節部がなり、振動体
の位置固定が困難であるという課題があった。Problems to be Solved by the Invention The conventional ultrasonic motor described above has a vibrating body! ff
Since i is small and therefore the vibration energy is small, there was a problem that the output was small. Further, the vibrating body of the annular ultrasonic motor has a problem in that vibration nodes occur due to traveling waves, making it difficult to fix the position of the vibrating body.
課題を解決するための手段
撓み振動モードで振動する第１の振動体と、撓み振動モ
ードまたは縦振動モードで振動する第２の振動体とを、
第１の振動体の撓み振動の節部を介して結合し、第１の
振動体に撓み振動を励振すると共に、第２の振動体に撓
み振動または縦振動を励振し、第１の振動体の撓み振動
の節部に設けられた突起と接触して設置された移動体を
駆動し、第２の振動体の振動の節部を介して位置固定す
る。Means for Solving the Problem A first vibrating body that vibrates in a flexural vibration mode, and a second vibrating body that vibrates in a flexural vibration mode or a longitudinal vibration mode,
The first vibrating body is coupled to the first vibrating body through the bending vibration node, and the first vibrating body is excited with bending vibration, and the second vibrating body is excited with bending vibration or longitudinal vibration. The movable body installed in contact with the protrusion provided at the bending vibration node of the second vibrating body is driven and fixed in position via the vibration node of the second vibrating body.
作 用
第１の振動体と、第２の振動体に共に定在波を励損して
、第１の振動体の撓み振動の節部を介して２つの振動体
を結合し、第２の振動体の振動の節部を介して位置固定
することにより損失の小さい固定を実現する。Function: A standing wave is excited in both the first vibrating body and the second vibrating body, the two vibrating bodies are coupled through the bending vibration nodes of the first vibrating body, and the second vibrating body is By fixing the position via the vibration nodes of the body, fixation with low loss is achieved.
また、第１の振動体に撓み振動を励損すると共に、第２
の振動体に撓み振動または縦振動を励振して、第１の振
動体の撓み振動の節部に設けられた突起の先端に楕円運
動を起こし、上記突起と接触して設置された移動体を駆
動することにより、振動体の振動エネルギーを太き（し
て、出力の大きな超音波モータを実現する。Also, while exciting the bending vibration in the first vibrating body, the second vibrating body
Exciting bending vibration or longitudinal vibration in the first vibrating body causes elliptical movement in the tip of the protrusion provided at the node of the bending vibration of the first vibrating body, and causes the movable body installed in contact with the protrusion to move. By driving the ultrasonic motor, the vibration energy of the vibrating body is increased, thereby realizing an ultrasonic motor with a large output.
実施例
以下、図面に従って本発明の実施例について詳細な説明
を行う。EXAMPLES Hereinafter, examples of the present invention will be described in detail with reference to the drawings.
実施例１
第１図は、本発明の１実施例の超音波モータの外観図で
ある。第１の振動体として、円環形弾性体１６と円環形
圧電体１７とから成る円環形娠動体１８を用い、撓み振
動モードとして、径方向１次・周方向４次の撓み振動モ
ードを用いている。Embodiment 1 FIG. 1 is an external view of an ultrasonic motor according to an embodiment of the present invention. As the first vibrating body, an annular moving body 18 consisting of an annular elastic body 16 and an annular piezoelectric body 17 is used, and as a flexural vibration mode, a radial first-order and circumferential fourth-order flexural vibration mode is used. There is.
第２図に、円環形振動体１８の径方向の変位分布を示す
。第３図に示すように、周方向にはｓｉｎ分布の波がの
る。１つは撓み振動の１波長に１つの割合で振動の節部
に設置された出力取り出し用の突起である。圧電体１７
に交流電界を印加ずれば、第１の振動体１８は、第３図
に示す周方向の撓み振動を起こし、１波長おきの節部に
設置された突起１９の先端は、横方向の運動をする。FIG. 2 shows the radial displacement distribution of the annular vibrating body 18. As shown in FIG. 3, a sinusoidal wave appears in the circumferential direction. One is a protrusion for outputting output installed at a node of vibration at a rate of one per wavelength of bending vibration. Piezoelectric body 17
When an alternating current electric field is applied to the first vibrating body 18, the first vibrating body 18 causes bending vibration in the circumferential direction as shown in FIG. do.
第２の振動体２２は、円筒形の弾性体２０と円環形の圧
電体２１で構成され、円環面が上下方向の変位を持つ縦
振動モードで振動する。そして、第１の振動体１８の振
動の節部を介して、２つの振動体１８と２２を結合する
。従って、第１の振動１８の突起１９の先端の動きと、
第２の振動体２２の円環面の動きとを同期させれば、突
起１９の先端は楕円軌跡を描く。突起１９の先端に、円
環形振動体２４と円環形弾性体２５とから成る円環形格
動体２６を加圧接触して設置すれば、移動体２６は回転
運動をする。超音波モータの固定は、第２の振動体２２
の縦振動の節部に設けた支持板２３を介して行う。The second vibrating body 22 is composed of a cylindrical elastic body 20 and an annular piezoelectric body 21, and vibrates in a longitudinal vibration mode in which the annular surface is vertically displaced. Then, the two vibrating bodies 18 and 22 are coupled via the vibration node of the first vibrating body 18. Therefore, the movement of the tip of the protrusion 19 of the first vibration 18,
If the movement of the toric surface of the second vibrating body 22 is synchronized, the tip of the protrusion 19 will draw an elliptical locus. If an annular moving body 26 consisting of an annular vibrating body 24 and an annular elastic body 25 is placed in pressurized contact with the tip of the protrusion 19, the moving body 26 rotates. The ultrasonic motor is fixed using the second vibrating body 22.
This is done via a support plate 23 provided at the node of longitudinal vibration.
実施例２ 第４図は、別の実施例の超音波モータの断面図である。Example 2 FIG. 4 is a sectional view of an ultrasonic motor according to another embodiment.
第１の振動体とし“て、円板形弾性体２７と円板形圧電
体２８とから成る円板形振動体２９を用い、撓み振動モ
ードとして、径方向２次・周方向３次の撓み振動モード
を用いている。第５図は、第１の振動体２９の撓み振動
の径方向の変位分布図である。また、周方向にはｓｉｎ
分布の波がのる。第６図に示すように、撓み振動の娠幅
の最大の半径と節との交点に、１波長に１つ設置された
出力取り出し用の突起３３が計３個設けている。圧電体
２８に交流電界を印加すれば、突起３３の先端は横方向
の運動をする。As the first vibrating body, a disc-shaped vibrating body 29 consisting of a disc-shaped elastic body 27 and a disc-shaped piezoelectric body 28 is used, and as a flexural vibration mode, radial secondary and circumferential tertiary flexures are used. The vibration mode is used. Fig. 5 is a radial displacement distribution diagram of the bending vibration of the first vibrating body 29.
The distribution waves. As shown in FIG. 6, a total of three output extraction protrusions 33, one per wavelength, are provided at the intersections of the nodes and the maximum radius of the flexural vibration width. When an alternating current electric field is applied to the piezoelectric body 28, the tips of the protrusions 33 move in the lateral direction.
第２の振動体３２は、第１の実施例と同様に、円筒形の
弾性体３０と円環形の圧電体３１とで構成され、円環面
が上下方向の変位を持つ縦振動モードで振動する。そし
て、第１の振動体２９の振動の節内部を介して、２つの
振動体２つと３２を結合する。従って、第１の振動体２
９の突起３３の先端の動きと、第２の振動体３２の円環
面の動きとを同期させれば、突起３３の先端は楕円軌跡
を描く。突起３３の先端に、移動体を加圧接触して設置
すれば、移動体は回転運動をする。また、超音波モータ
の固定は、第２の振動体３２の縦振動の節部に設けた支
持板３４を介して行う。Like the first embodiment, the second vibrating body 32 is composed of a cylindrical elastic body 30 and a toroidal piezoelectric body 31, and vibrates in a longitudinal vibration mode in which the toric surface is vertically displaced. do. Then, the two vibrating bodies 32 are coupled to each other via the inside of the vibration node of the first vibrating body 29 . Therefore, the first vibrating body 2
If the movement of the tip of the protrusion 33 of No. 9 and the movement of the toric surface of the second vibrating body 32 are synchronized, the tip of the protrusion 33 will draw an elliptical locus. If a movable body is placed in pressurized contact with the tip of the protrusion 33, the movable body rotates. Further, the ultrasonic motor is fixed via a support plate 34 provided at a node of longitudinal vibration of the second vibrating body 32.
実施例３
第１および第２の振動体として、実施例１と同様に円環
形振動体を用い、撓み振動モードとして径方向１次・周
方向４次の撓み振動モードを用いている。円環形弾性体
３５と円環形圧電体３６とから成る円環形振動体３７を
用い、円環形弾性体３９と円環形圧電体４０とから成る
円環形振動体４１を用いている。撓み振動モードとして
、径方向１次・周方向４次の撓み振動モードを用いてい
る。Example 3 As the first and second vibrators, annular vibrators are used as in Example 1, and the radial first-order and circumferential fourth-order bending vibration modes are used as the bending vibration modes. An annular vibrating body 37 consisting of an annular elastic body 35 and an annular piezoelectric body 36 is used, and an annular vibrating body 41 consisting of an annular elastic body 39 and an annular piezoelectric body 40 is used. As the bending vibration mode, a first order bending vibration mode in the radial direction and a fourth order bending vibration mode in the circumferential direction are used.
第１の振動体の振動の節部に、出力取り出し用の突起３
８を設け、第２の振動体の振動の腹近傍に、結合用の突
起４２を設けている。２つの振動体の結合は、突起４２
により第１の振動体の振動の節部を介して行われる。突
起３８は横方向の運動を行い、突起４２は上下方向の運
動を行うので、２つの運動を同期させれば、突起３８の
先端に楕円軌跡を起こすことができる。従って、突起３
８の先端に、加圧接触して移動体を設置すれば、移動体
は回転運動をする。また、超音波モータの位置固定は、
第２の振動体の節部を介して行われる。At the vibration node of the first vibrating body, there is a protrusion 3 for taking out the output.
8, and a coupling protrusion 42 is provided near the antinode of the vibration of the second vibrating body. The two vibrating bodies are connected by a protrusion 42
This is done through the vibration nodes of the first vibrating body. Since the protrusion 38 moves in the lateral direction and the protrusion 42 moves in the vertical direction, if the two movements are synchronized, an elliptical trajectory can be generated at the tip of the protrusion 38. Therefore, protrusion 3
If a movable body is placed in pressure contact with the tip of the movable body 8, the movable body will rotate. In addition, the position of the ultrasonic motor can be fixed by
This is done via the node of the second vibrating body.
発明の効果
以上、説明したように本発明の超音波モータは、位置固
定を振動の節部で行うことにより損失の小さい固定を実
現し、振動体の振動エネルギーを太き（できるので、出
力の大きな超音波モータを提供できる。Effects of the Invention As explained above, the ultrasonic motor of the present invention achieves position fixation at vibration nodes to achieve fixation with low loss, and to increase the vibration energy of the vibrating body (as it is possible to increase the output We can provide large ultrasonic motors.
第１図は本発明の第１実施例の超音波モータの斜視図、
第２図は同実施例の第１の振動体の径方向の変位分布図
、第３図は同振動体の周方向の変位分布図、第４図は本
発明の第２実施例の超音波モータの断面図、第５図は同
実施例の第１の振動体の径方向の変位分布図、第６図は
同振動体の平第
面図、第７図は本発明の第３実施例の超音波モータの斜
視図、第８図は従来の円環型超音波モータの切り欠き斜
視図、第９図は従来の円板型超音波モータの切り欠き斜
視図、第１０図は超音波モータの動作原理の説明図であ
る。
１６・・・・・・弾性体、１７・・・・・・圧電体、１
８・・・・・・第１の振動体、１９・・・・・・突起２
０・・・・・・弾性体、２１・・・・・・圧電体２２・
・・・・・第２の振動体、２３・・・・・・支持板２４
・・・・・・摩擦材、２５・・・・・・弾性体２６・・
・・・・移動体、２７・・・・・・弾性体２８・・・・
・・圧電体、２９・・・・・・第１の振動体３０・・・
・・・弾性体、３１・・・・・・圧電体３２・・・・・
・第２の振動体、３３・・・・・・突起３４・・・・・
・支持板、３５・・・・・・弾性体３６・・・・・・圧
電体、３７・・・・・・第１の振動体３８・・・・・・
突起、３９・・・・・・弾性体４０・・・・・・圧電体
、４１・・・・・・第２の振動体４２・・・・・・突起
、４３・・・・・・支持具。
代理人の氏名 弁理士 粟野重孝 はか１名図
第
図
第
図
皐
婆、７旬FIG. 1 is a perspective view of an ultrasonic motor according to a first embodiment of the present invention;
Fig. 2 is a radial displacement distribution diagram of the first vibrating body of the same embodiment, Fig. 3 is a circumferential displacement distribution diagram of the same vibrating body, and Fig. 4 is an ultrasonic wave diagram of the second embodiment of the present invention. A sectional view of the motor, FIG. 5 is a radial displacement distribution diagram of the first vibrating body of the same embodiment, FIG. 6 is a plan view of the same vibrating body, and FIG. 7 is a third embodiment of the present invention. Fig. 8 is a cutaway perspective view of a conventional annular ultrasonic motor, Fig. 9 is a cutaway perspective view of a conventional disk type ultrasonic motor, and Fig. 10 is a perspective view of a conventional circular ultrasonic motor. FIG. 3 is an explanatory diagram of the operating principle of a motor. 16...Elastic body, 17...Piezoelectric body, 1
8...First vibrating body, 19...Protrusion 2
0...Elastic body, 21...Piezoelectric body 22.
...Second vibrating body, 23...Support plate 24
...Friction material, 25...Elastic body 26...
...Moving body, 27...Elastic body 28...
...Piezoelectric body, 29...First vibrating body 30...
...Elastic body, 31...Piezoelectric body 32...
・Second vibrating body, 33...Protrusion 34...
・Support plate, 35...Elastic body 36...Piezoelectric body, 37...First vibrating body 38...
Protrusion, 39...Elastic body 40...Piezoelectric body, 41...Second vibrating body 42...Protrusion, 43...Support Ingredients. Name of agent: Patent attorney Shigetaka Awano
Claims (3)
する第１の振動体と、弾性体と圧電体とから成る撓み振
動モードまたは縦振動モードで振動する第２の振動体と
を、第１の振動体の撓み振動の節部を介して結合し、前
記第１の振動体に撓み振動を励振すると共に、前記第２
の振動体に撓み振動または縦振動を励振し、前記第１の
振動体の撓み振動の１波長おきの節部に設けられた突起
と接触して設置された移動体を駆動し、前記第２の振動
体の振動の節部を介して位置固定したことを特徴とする
超音波モータ。(1) A first vibrating body that vibrates in a flexural vibration mode consisting of an elastic body and a piezoelectric body, and a second vibrating body that vibrates in a flexural vibration mode or a longitudinal vibration mode consisting of an elastic body and a piezoelectric body, The first vibrating body is coupled to the first vibrating body through a bending vibration node, and the first vibrating body is excited with bending vibration, and the second
Exciting bending vibration or longitudinal vibration in the vibrating body, driving a movable body installed in contact with a protrusion provided at a node at every wavelength of the bending vibration of the first vibrating body; An ultrasonic motor whose position is fixed via a vibration node of a vibrating body.
体とから成る円環形振動体を用い、撓み振動モードとし
て、径方向１次・周方向３次以上の撓み振動モードを用
いるか、もしくは円板形圧電体と円板形弾性体とから成
る円板形振動体を用い、撓み振動モードとして、径方向
２次・周方向３次以上の撓み振動モードを用いたことを
特徴とする請求項１に記載の超音波モータ。(2) As the first vibrating body, a circular vibrating body consisting of a circular piezoelectric body and a circular elastic body is used, and as the bending vibration mode, a first-order radial vibration mode, a third-order or higher-order bending vibration mode in the circumferential direction is used. It is characterized by using a disc-shaped vibrating body made of a disc-shaped piezoelectric body and a disc-shaped elastic body, and using a radial second-order, circumferential third-order or higher bending vibration mode as the bending vibration mode. The ultrasonic motor according to claim 1.
体とから成る円環形振動体を用いて、撓み振動モードと
して、径方向１次・周方向３次以上の撓み振動モードを
用いるか、もしくは円板形圧電体と円板形弾性体とから
成る円板形振動体を用いて、撓み振動モードとして、径
方向２次・周方向３次以上の撓み振動モードを用い、前
記第２の振動体の振動の振幅の最大点近傍と、前記第１
の振動体の撓み振動の節部を介して２つの振動体を結合
するか、または第２の振動体として、円筒または円柱の
縦振動を用いて、第２の振動体の任意の点と、第１の振
動体の撓み振動の節部を介して２つの振動体を結合した
ことを特徴とする請求項１に記載の超音波モータ。(3) As the second vibrating body, a toroidal vibrating body consisting of a toroidal piezoelectric body and a toroidal elastic body is used, and as a bending vibration mode, a bending vibration mode of first order in the radial direction, third order in the circumferential direction or more is generated. Alternatively, a disk-shaped vibrating body consisting of a disk-shaped piezoelectric body and a disk-shaped elastic body is used, and a flexural vibration mode of 2nd order in the radial direction, 3rd order or higher in the circumferential direction is used as the flexural vibration mode, and the above-mentioned the vicinity of the maximum point of the vibration amplitude of the second vibrating body;
Connect two vibrating bodies through the bending vibration nodes of the vibrating body, or use vertical vibration of a cylinder or column as the second vibrating body, and connect any point of the second vibrating body to 2. The ultrasonic motor according to claim 1, wherein the two vibrating bodies are coupled via a bending vibration node of the first vibrating body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220936A JP2558830B2 (en) | 1988-09-02 | 1988-09-02 | Ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220936A JP2558830B2 (en) | 1988-09-02 | 1988-09-02 | Ultrasonic motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0270277A true JPH0270277A (en) | 1990-03-09 |
| JP2558830B2 JP2558830B2 (en) | 1996-11-27 |
Family
ID=16758880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63220936A Expired - Lifetime JP2558830B2 (en) | 1988-09-02 | 1988-09-02 | Ultrasonic motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2558830B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5041750A (en) * | 1989-12-15 | 1991-08-20 | Canon Kabushiki Kaisha | Vibration wave driven apparatus |
| US5097172A (en) * | 1990-07-20 | 1992-03-17 | Sundstrand Data Control, Inc. | Mounting system for transducer |
| US5402030A (en) * | 1989-12-13 | 1995-03-28 | Canon Kabushiki Kaisha | Vibration wave driven apparatus |
| US6104124A (en) * | 1997-08-01 | 2000-08-15 | Seiko Instruments Inc. | Ultrasonic motor and electronic apparatus and analog timepiece having the ultrasonic motor |
| CN104714684A (en) * | 2013-12-17 | 2015-06-17 | 现代自动车株式会社 | Display apparatus for vehicle |
-
1988
- 1988-09-02 JP JP63220936A patent/JP2558830B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5402030A (en) * | 1989-12-13 | 1995-03-28 | Canon Kabushiki Kaisha | Vibration wave driven apparatus |
| US5041750A (en) * | 1989-12-15 | 1991-08-20 | Canon Kabushiki Kaisha | Vibration wave driven apparatus |
| US5097172A (en) * | 1990-07-20 | 1992-03-17 | Sundstrand Data Control, Inc. | Mounting system for transducer |
| US6104124A (en) * | 1997-08-01 | 2000-08-15 | Seiko Instruments Inc. | Ultrasonic motor and electronic apparatus and analog timepiece having the ultrasonic motor |
| CN104714684A (en) * | 2013-12-17 | 2015-06-17 | 现代自动车株式会社 | Display apparatus for vehicle |
| US20150169083A1 (en) * | 2013-12-17 | 2015-06-18 | Hyundai Motor Company | Display apparatus for vehicle |
| US9519362B2 (en) * | 2013-12-17 | 2016-12-13 | Hyundai Motor Company | Display apparatus for vehicle |
| US9740314B2 (en) | 2013-12-17 | 2017-08-22 | Hyundai Motor Company | Display apparatus for vehicle |
| CN104714684B (en) * | 2013-12-17 | 2019-02-15 | 现代自动车株式会社 | Display device for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2558830B2 (en) | 1996-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5039899A (en) | Piezoelectric transducer | |
| JPH0284079A (en) | Supporting device of oscillatory wave motor | |
| JPH0217877A (en) | Oscillator and ultrasonic motor using this oscillator | |
| JP4261894B2 (en) | Vibration type driving device | |
| JPH0270277A (en) | Ultrasonic motor | |
| JPS62259485A (en) | Piezoelectric driving apparatus | |
| KR100661311B1 (en) | Piezoelectric ultrasonic motor | |
| JP2769151B2 (en) | Ultrasonic motor | |
| JPS6185076A (en) | Vibration wave ring motor | |
| JPH0315278A (en) | Elastic vibrator in traveling bending vibration motor | |
| JPS59191488A (en) | Improvement of stator of surface wave motor | |
| JPS63283475A (en) | Ultrasonic motor | |
| JPS63240382A (en) | Ultrasonic motor | |
| JPH02142368A (en) | Ultrasonic motor | |
| JPH03118780A (en) | Ultrasonic motor | |
| JPH02202379A (en) | Planar ultrasonic actuator | |
| JPS61262091A (en) | Vibration wave motor | |
| JPH01214271A (en) | Ultrasonic motor | |
| JPS62196081A (en) | Ultrasonic motor | |
| JP2885802B2 (en) | Ultrasonic motor | |
| JPH06153546A (en) | Ultrasonic oscillator and ultrasonic actuator | |
| JPH0246180A (en) | Ultrasonic linear motor | |
| JPH01311878A (en) | Ultrasonic motor | |
| JPH01291674A (en) | Ultrasonic vibrator and ultrasonic motor | |
| JPH0251379A (en) | Ultrasonic motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080905 Year of fee payment: 12 |
|
| EXPY | Cancellation because of completion of term |