JPS6123373A - Piezoelectric displacement element - Google Patents
Piezoelectric displacement elementInfo
- Publication number
- JPS6123373A JPS6123373A JP59143531A JP14353184A JPS6123373A JP S6123373 A JPS6123373 A JP S6123373A JP 59143531 A JP59143531 A JP 59143531A JP 14353184 A JP14353184 A JP 14353184A JP S6123373 A JPS6123373 A JP S6123373A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric
- displacement element
- electrode
- electrodes
- piezoelectric displacement
- 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
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 24
- 239000007767 bonding agent Substances 0.000 abstract 2
- 230000002265 prevention Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
- G11B5/588—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads
- G11B5/592—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads using bimorph elements supporting the heads
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2041—Beam type
- H10N30/2042—Cantilevers, i.e. having one fixed end
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はＶＴＲのビデオヘッドの位置制御する等の微少
変位を得たいととるで使用する圧電変位素子に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a piezoelectric displacement element used for obtaining minute displacements such as controlling the position of a video head of a VTR.
従来例の構成とその問題点
一般にＶＴＲのビデオヘッドの位置制御する場合は、圧
電変位素子を片持梁とし先端にビデオヘッドを取付け、
記録テープのスピードが変化した場合でも記録テープの
記録部（アジマス）を忠実にビデオヘッドがトレースす
るように、圧電変位素子に印加する電圧を変えることに
よりビデオヘッドの位置を制御するものである。Conventional configuration and its problems Generally, when controlling the position of the video head of a VTR, a piezoelectric displacement element is used as a cantilever beam, and the video head is attached to the tip.
The position of the video head is controlled by changing the voltage applied to the piezoelectric displacement element so that the video head faithfully traces the recording portion (azimuth) of the recording tape even when the speed of the recording tape changes.
従来のこの種の圧電変位素子は第１図に示すように構成
されていた。すなわち、１は圧電素子、２ａ、２ｂ、２
ｃ、２ｄは電極で、図ニ示スヨウに変位を大きくとるた
め二枚の圧電素子１を並列型に接着剤で貼合せたバイモ
ルフ構造となっている。圧電変位素子の先端に取付ける
ビデオヘッドと圧電素子１の電極２ａ又は２ｂと絶縁を
とりたい、又ビデオヘッドと記録テープとの相対角度を
大きくしたくないため先端部は電圧を印加しても、たわ
まないようにしたい等の理由より、圧電変位素子の先端
部には電極を設けないパターン電極２ａ、２ｂ、２ｃ、
２ｄとなッテイる。A conventional piezoelectric displacement element of this type was constructed as shown in FIG. That is, 1 is a piezoelectric element, 2a, 2b, 2
Reference numerals c and 2d denote electrodes, which have a bimorph structure in which two piezoelectric elements 1 are bonded in parallel with adhesive in order to achieve a large displacement as shown in the figure. Because we want to insulate the video head attached to the tip of the piezoelectric displacement element from the electrode 2a or 2b of the piezoelectric element 1, and because we do not want to increase the relative angle between the video head and the recording tape, even if a voltage is applied to the tip, Due to reasons such as wanting to prevent bending, pattern electrodes 2a, 2b, 2c, which do not provide electrodes at the tips of the piezoelectric displacement elements.
It becomes 2d.
この場合、貼合せ面の電極のない部分３に接着剤が完全
に充填されないため電極のない先端部に反りが発生する
等の問題があった。In this case, since the adhesive is not completely filled in the electrode-free portion 3 of the bonding surface, there are problems such as warping of the electrode-free tip.
発明の目的
本発明の圧電変位素子はこのような従来の欠点を除去す
るもので、貼合せ面の中間電極を全面電極とし、接着剤
が均一に充填され、反りも発生し３へ−１
ないようにし、安定した変位を得ることを目的とするも
のである。Purpose of the Invention The piezoelectric displacement element of the present invention eliminates such conventional drawbacks, and uses the intermediate electrode on the bonding surface as an electrode on the entire surface, so that the adhesive is uniformly filled and there is no warping. The purpose of this is to obtain stable displacement.
発明の構成
この目的を達成するために本発明は、圧電素子の貼合せ
面の中間電極を全面電極とし、外部に露出する上記貼合
せ面以外の二面をパターン電極とし、バイモルフ構造の
圧電変位素子を構成する。Structure of the Invention In order to achieve this object, the present invention uses the intermediate electrode on the bonded surface of the piezoelectric element as a full-surface electrode, and the two surfaces exposed to the outside other than the bonded surface as pattern electrodes, and a piezoelectric displacement of a bimorph structure. Configure the element.
この構成によって貼合せ面の中間電極は全面電極のため
、接着剤が均一に充填され、反りの発生も防止できる。With this configuration, since the intermediate electrode on the bonding surface is an electrode on the entire surface, the adhesive can be filled uniformly and the occurrence of warping can be prevented.
又、露出する２つの面の先端は電極がないため、ビデオ
ヘッドと絶縁がとれ、先端は電圧を印加しても撓わない
ためビデオヘッドと記録テープの相対角度が大きくなら
ないこととなるＯ
実施例の説明
以下５本発明の一実施例を第２図、第３図を用いて説明
する。In addition, since the tips of the two exposed surfaces do not have electrodes, they are insulated from the video head, and the tips do not bend even when voltage is applied, so the relative angle between the video head and the recording tape does not become large. DESCRIPTION OF AN EXAMPLE An example of the present invention will be described below with reference to FIGS. 2 and 3.
第２図は本発明の一実施例の斜視図で３は圧電素子、４
ａ、４ｂ、４ｃ、４ｄは電極で圧電素子３を二枚貼り合
わせた並列型のバイモルフ構造となっている。このよう
に圧電素子３の貼合せ面の中間電極４ｂ、４ｃを全面電
極としているため、接着剤が均一に充填される。又反り
の発生もなく安定した変位特性が得られる。FIG. 2 is a perspective view of one embodiment of the present invention, where 3 is a piezoelectric element, 4 is a piezoelectric element, and 4 is a piezoelectric element.
A, 4b, 4c, and 4d are electrodes, which have a parallel bimorph structure in which two piezoelectric elements 3 are bonded together. Since the intermediate electrodes 4b and 4c on the bonding surface of the piezoelectric element 3 are used as full-surface electrodes in this way, the adhesive is uniformly filled. Moreover, stable displacement characteristics can be obtained without warping.
第３図に本発明の圧電変位素子の使用例を示す斜視図で
ある。６は支持体、６はビデオヘッドである。図に示す
ように並列型のバイモルフ構造の圧電変位素子に電圧を
印加すると二枚の圧電素子３がタワミ振動し、ビデオヘ
ッド６は上下に振動することになる。FIG. 3 is a perspective view showing an example of use of the piezoelectric displacement element of the present invention. 6 is a support body, and 6 is a video head. As shown in the figure, when a voltage is applied to the piezoelectric displacement elements having a parallel bimorph structure, the two piezoelectric elements 3 vibrate in a vertical direction, and the video head 6 vibrates vertically.
発明の効果
以上のように本発明の圧電変位素子によれば、貼合せ面
の中間電極は全面電極のため、接着剤が均一に充填され
、又反りの発生も防止でき安定した変位特性を得ること
ができる。又他の二面はパターン電極で先端には電極が
ないため、ビデオヘッドと絶縁がとれる。先端は電圧を
印加しても撓わ女いためビデオヘッドと記録テープの相
対角度が大きくならないこととなる。以上、述べたよう
に本発明は実用的価値の高いものである。Effects of the Invention As described above, according to the piezoelectric displacement element of the present invention, since the intermediate electrode on the bonding surface is an electrode on the entire surface, the adhesive is uniformly filled, and the occurrence of warping can be prevented, resulting in stable displacement characteristics. be able to. Also, since the other two sides have pattern electrodes and there is no electrode at the tip, it can be insulated from the video head. Since the tip does not bend even when voltage is applied, the relative angle between the video head and the recording tape does not become large. As described above, the present invention has high practical value.
第１図は従来の圧電変位素子を示す斜視図、第２図は本
発明の一実施例による圧電変位素子を示す斜視図、第３
図は本発明の圧電変位素子の使用例を示す斜視図である
。
３・・・・・・圧電素子、４ａ〜４ｄ・・・・・・電極
。FIG. 1 is a perspective view showing a conventional piezoelectric displacement element, FIG. 2 is a perspective view showing a piezoelectric displacement element according to an embodiment of the present invention, and FIG.
The figure is a perspective view showing an example of use of the piezoelectric displacement element of the present invention. 3... Piezoelectric element, 4a to 4d... Electrode.
Claims (1)
露出する上記貼合せ面以外の二面をパターン電極とした
ことを特徴とするバイモルフ構造の圧電変位素子。A piezoelectric displacement element having a bimorph structure, characterized in that an intermediate electrode on a bonded surface of the piezoelectric element is a full-surface electrode, and two surfaces other than the bonded surface exposed to the outside are patterned electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59143531A JPS6123373A (en) | 1984-07-11 | 1984-07-11 | Piezoelectric displacement element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59143531A JPS6123373A (en) | 1984-07-11 | 1984-07-11 | Piezoelectric displacement element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6123373A true JPS6123373A (en) | 1986-01-31 |
Family
ID=15340904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59143531A Pending JPS6123373A (en) | 1984-07-11 | 1984-07-11 | Piezoelectric displacement element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6123373A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5079472A (en) * | 1989-06-22 | 1992-01-07 | Hoechst Ceramtec Aktiengesellschaft | Piezoelectric bending transducer and the use thereof |
| EP0511763A2 (en) * | 1991-04-22 | 1992-11-04 | Canon Kabushiki Kaisha | Cantilever type probe, and scanning tunnel microscope and information processing apparatus employing the same |
-
1984
- 1984-07-11 JP JP59143531A patent/JPS6123373A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5079472A (en) * | 1989-06-22 | 1992-01-07 | Hoechst Ceramtec Aktiengesellschaft | Piezoelectric bending transducer and the use thereof |
| EP0511763A2 (en) * | 1991-04-22 | 1992-11-04 | Canon Kabushiki Kaisha | Cantilever type probe, and scanning tunnel microscope and information processing apparatus employing the same |
| EP0511763A3 (en) * | 1991-04-22 | 1994-03-23 | Canon Kk |
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