JPH029561Y2 - - Google Patents
Info
- Publication number
- JPH029561Y2 JPH029561Y2 JP6609982U JP6609982U JPH029561Y2 JP H029561 Y2 JPH029561 Y2 JP H029561Y2 JP 6609982 U JP6609982 U JP 6609982U JP 6609982 U JP6609982 U JP 6609982U JP H029561 Y2 JPH029561 Y2 JP H029561Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical piezoelectric
- piezoelectric ceramics
- cylindrical
- piezoelectric ceramic
- electrodes
- 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
Links
- 239000000919 ceramic Substances 0.000 claims description 41
- 230000010287 polarization Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Description
【考案の詳細な説明】
本考案は、複数個の直径の異なる円筒形圧電磁
器を使用した円筒型圧電駆動体に関するものであ
る。[Detailed Description of the Invention] The present invention relates to a cylindrical piezoelectric drive body using a plurality of cylindrical piezoelectric ceramics having different diameters.
一般に、圧電磁器で構成された圧電バイモルフ
は、その屈曲モードを利用すると、比較的低い電
圧で大きな変位が得られるために、スピーカーや
リレーに用いられている。 In general, piezoelectric bimorphs made of piezoelectric ceramics are used in speakers and relays because their bending mode allows large displacements to be obtained with relatively low voltage.
本考案は、上記の点を考慮して、複数個の直径
の異なる円筒の圧電磁器を同心上に配列し、圧電
磁器の端部を交互に連結することを特徴とし、そ
の目的は大きな変位が得られ、長さ方向に小さな
形状を持つ円筒型圧電駆動体を提供するものであ
る。以下、図面により実施例を詳細に説明する。 Taking the above points into consideration, the present invention is characterized by arranging a plurality of cylindrical piezoelectric ceramics with different diameters concentrically and connecting the ends of the piezoelectric ceramics alternately. This provides a cylindrical piezoelectric drive body having a small shape in the length direction. Hereinafter, embodiments will be described in detail with reference to the drawings.
第１図及び第２図は、本考案の一実施例の断面
図及び平面図を示したもので、チタン酸ジルコン
酸鉛等の圧電磁器材料からなる円筒形圧電磁器１
の内外面に電極１ａ，１ｂが設けられて分極処理
が施され、またこの円筒形圧電磁器１の内面側
に、これと微少間隙をあけて、同様に内外面に電
極２ａ，２ｂが設けられ、分極が施された円筒形
圧電磁器２を配列し、円筒形圧電磁器１および２
の端面の一方に磁器または金属からなる環状連結
板５を有機質または無機質の接着材で接合する。
次に、円筒形圧電磁器２の内面側に微少間隙を設
けて、同様に電極３ａ，３ｂが設けられ、分極が
施された円筒形圧電磁器３を配置し、円筒形圧電
磁器２の他方の端面と円筒形圧電磁器３の端面に
磁器または金属からなる環状連結板６を接合す
る。同様に円筒形圧電磁器３の内面に、これと微
少間隙を設けて配置された円筒形圧電磁器４の端
面に環状連結板７を接合する。 1 and 2 show a sectional view and a plan view of an embodiment of the present invention, in which a cylindrical piezoelectric ceramic 1 made of a piezoelectric ceramic material such as lead zirconate titanate, etc.
Electrodes 1a and 1b are provided on the inner and outer surfaces of the cylindrical piezoelectric ceramic 1 for polarization treatment, and electrodes 2a and 2b are similarly provided on the inner and outer surfaces of the cylindrical piezoelectric ceramic 1 with a slight gap therebetween. , the polarized cylindrical piezoelectric ceramics 2 are arranged, and the cylindrical piezoelectric ceramics 1 and 2 are arranged.
An annular connecting plate 5 made of porcelain or metal is bonded to one of the end faces using an organic or inorganic adhesive.
Next, a minute gap is provided on the inner surface of the cylindrical piezoelectric ceramic 2, and the cylindrical piezoelectric ceramic 3 similarly provided with electrodes 3a and 3b and polarized is placed, and the other side of the cylindrical piezoelectric ceramic 2 is placed. An annular connecting plate 6 made of ceramic or metal is bonded to the end face and the end face of the cylindrical piezoelectric ceramic 3. Similarly, the annular connecting plate 7 is joined to the end face of the cylindrical piezoelectric ceramic 4 which is arranged on the inner surface of the cylindrical piezoelectric ceramic 3 with a slight gap therebetween.
このように、同心上に配列され、隣接した円筒
形圧電磁器の端面を交互に連結したものは、機械
振動的には、円筒形圧電磁器の軸方向にたいして
直列結合となる。従つて、円筒形圧電磁器１の遊
端部８を固定し、円筒形圧電磁器４の遊端部９に
駆動部を設け、たとえば第２図に示したように、
円筒形圧電磁器１，２，３，４のそれぞれの電極
１ａ，２ｂ，３ａ，４ｂを（＋）電極に、電極１
ｂ，２ａ，３ｂ，４ａを（−）電極となるように
分極を設けて、電極１ａ，２ａ，３ａ，４ａと電
極１ｂ，２ｂ，３ｂ，４ｂをそれぞれ共通とし、
電気的に並列に結線して直流電圧を印加すると、
円筒形圧電磁器１，３が伸びるとき、円筒形圧電
磁器２，４が縮むため、印加電圧に比例して駆動
部９に円筒軸方向に大きな変位量と大きな力が得
られるので、機械装置の微調整駆動源として利用
することができる。 In this way, the end surfaces of adjacent cylindrical piezoelectric ceramics arranged concentrically and alternately connected are connected in series in the axial direction of the cylindrical piezoelectric ceramics in terms of mechanical vibration. Therefore, the free end 8 of the cylindrical piezoelectric ceramic 1 is fixed, and the free end 9 of the cylindrical piezoelectric ceramic 4 is provided with a driving section, for example, as shown in FIG.
The electrodes 1a, 2b, 3a, 4b of the cylindrical piezoelectric ceramics 1, 2, 3, 4 are (+) electrodes, and the electrode 1
Polarization is provided so that b, 2a, 3b, and 4a are (-) electrodes, and electrodes 1a, 2a, 3a, and 4a are common to electrodes 1b, 2b, 3b, and 4b, respectively.
When electrically connected in parallel and applying DC voltage,
When the cylindrical piezoelectric ceramics 1 and 3 extend, the cylindrical piezoelectric ceramics 2 and 4 contract, so that a large amount of displacement and a large force in the cylindrical axial direction are obtained in the drive section 9 in proportion to the applied voltage. It can be used as a fine adjustment drive source.
また、それぞれの円筒形圧電磁器１〜４に分極
処理を施し、それぞれの長さをλ／２長に選んで
交番電圧を印加すると、その共振周波数で最大振
幅が励起されるので、円筒形圧電磁器の駆動部９
に設けられた駆動体は円筒軸の方向に交番振動を
するので、ワイヤの摩耗やスプリングの疲労試験
に適用することができる。 In addition, when each of the cylindrical piezoelectric ceramics 1 to 4 is polarized, the length of each is selected to be λ/2 length, and an alternating voltage is applied, the maximum amplitude is excited at the resonance frequency, so the cylindrical piezoelectric ceramic Porcelain drive unit 9
The drive body installed in the cylindrical axis vibrates alternately in the direction of the cylindrical axis, so it can be applied to wire wear and spring fatigue tests.
ここで、第３図に示したように、円筒形圧電磁
器１，２に設けられた電極１ｂ，２ｂの端部を、
円筒形圧電磁器１，２の端面に折り返し、金属材
からなる環状連結板５に当接するように設けて
（−）極とすると電気的シールド効果も兼ね備え
ることができる。また、第３図において、円筒型
圧電磁器１，２の及びは分極の方向を示して
おり、円筒型圧電磁器１のに＋電圧が印加さ
れ、円筒型圧電磁器１のに一電圧が印加されて
いるので、円筒型圧電磁気１は伸張し、また、円
筒型圧電磁器２のに＋電圧が印加され、円筒型
圧電磁器２のに−電圧が印加されているので、
円筒型圧電磁器２は縮むように構成される。 Here, as shown in FIG. 3, the ends of the electrodes 1b and 2b provided on the cylindrical piezoelectric ceramics 1 and 2 are
If the end faces of the cylindrical piezoelectric ceramics 1 and 2 are folded back and provided so as to come into contact with the annular connecting plate 5 made of a metal material to form a (-) pole, it can also have an electrical shielding effect. Further, in FIG. 3, the cylindrical piezoelectric ceramics 1 and 2 indicate the direction of polarization, and a + voltage is applied to the cylindrical piezoelectric ceramic 1, and a voltage is applied to the cylindrical piezoelectric ceramic 1. Therefore, the cylindrical piezoelectric magnet 1 expands, and since a positive voltage is applied to the cylindrical piezoelectric ceramic 2 and a - voltage is applied to the cylindrical piezoelectric ceramic 2,
The cylindrical piezoelectric ceramic 2 is configured to contract.
なお、円筒形圧電磁器１，２，３，４のそれぞ
れの電気的インピーダンスを調整するために、円
筒形圧電磁器のそれぞれの肉厚を変えたり、電極
面積を変えたりすることは、当然本考案において
実施されることである。 Note that, in order to adjust the electrical impedance of each of the cylindrical piezoelectric ceramics 1, 2, 3, and 4, it is of course possible to change the wall thickness or electrode area of each of the cylindrical piezoelectric ceramics according to the present invention. It is to be implemented in
また、本実施例では、円筒形圧電磁器を４個用
いた例を示したが、その個数については何等制限
はなく、更に複数個を縦列接合してもよい。 Further, in this embodiment, an example is shown in which four cylindrical piezoelectric ceramics are used, but there is no restriction on the number, and a plurality of piezoelectric ceramics may be joined in tandem.
以上説明したように、本考案によれば、円筒形
圧電磁器の複数個を同心上に縦列接合することに
より、円筒軸方向の長さを短くできるために、単
一径の円筒形圧電磁器を用いた物よりもコンパク
トにでき、固定部よりも駆動部のほうが径が小さ
くなるため、振幅も大きくとれるので、その応用
範囲も広く、実用的利益が大きいという利点があ
る。 As explained above, according to the present invention, by joining a plurality of cylindrical piezoelectric ceramics concentrically in tandem, the length in the axial direction of the cylinder can be shortened. It has the advantage that it can be made more compact than the previously used one, and since the diameter of the drive part is smaller than that of the fixed part, the amplitude can be increased, so the range of application is wide and the practical benefits are great.
第１図は、本考案の一実施例の平面図、第２図
は、第１図の断面図、第３図は、本考案の他の実
施例の電極構造を示した部分的断面図である。
１，２，３，４……円筒形圧電磁器、１ａ，１
ｂ，２ａ，２ｂ，３ａ，３ｂ，４ａ，４ｂ……電
極、５，６，７……環状連結板、８……遊端部、
９……駆動部。
FIG. 1 is a plan view of one embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1, and FIG. 3 is a partial sectional view showing the electrode structure of another embodiment of the present invention. be. 1, 2, 3, 4... Cylindrical piezoelectric ceramic, 1a, 1
b, 2a, 2b, 3a, 3b, 4a, 4b... Electrode, 5, 6, 7... Annular connecting plate, 8... Free end portion,
9... Drive section.
Claims (1)
た直径の異なる複数個の円筒形圧電磁器を同心上
に配列し、相隣る円筒形圧電磁器の端面がそれぞ
れ交互に連結されて、全体が機械的に直列に結合
された構造をもつことを特徴とする円筒型圧電駆
動体。 A plurality of polarized cylindrical piezoelectric ceramics with electrodes provided on the inner and outer surfaces and having different diameters are arranged concentrically, and the end faces of the adjacent cylindrical piezoelectric ceramics are connected alternately, so that the whole A cylindrical piezoelectric drive body characterized by having a mechanically connected structure in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6609982U JPS58168047U (en) | 1982-05-06 | 1982-05-06 | Cylindrical piezoelectric drive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6609982U JPS58168047U (en) | 1982-05-06 | 1982-05-06 | Cylindrical piezoelectric drive body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58168047U JPS58168047U (en) | 1983-11-09 |
| JPH029561Y2 true JPH029561Y2 (en) | 1990-03-09 |
Family
ID=30075998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6609982U Granted JPS58168047U (en) | 1982-05-06 | 1982-05-06 | Cylindrical piezoelectric drive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58168047U (en) |
-
1982
- 1982-05-06 JP JP6609982U patent/JPS58168047U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58168047U (en) | 1983-11-09 |
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