JPH0132748Y2 - - Google Patents
Info
- Publication number
- JPH0132748Y2 JPH0132748Y2 JP6610182U JP6610182U JPH0132748Y2 JP H0132748 Y2 JPH0132748 Y2 JP H0132748Y2 JP 6610182 U JP6610182 U JP 6610182U JP 6610182 U JP6610182 U JP 6610182U JP H0132748 Y2 JPH0132748 Y2 JP H0132748Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical piezoelectric
- piezoelectric ceramic
- cylindrical
- notch
- piezoelectric ceramics
- 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
- 238000006073 displacement reaction Methods 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 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
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切欠部を持つ
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 cylindrical piezoelectric ceramic having a plurality of notches 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、外周から内方
向に切欠部を設けた複数個の直径の異なる円筒形
圧電磁器を同心上に配列し、圧電磁器の切欠部の
端部を交互に連結することを特徴とし、その目的
は円筒軸と垂直方向に伸縮する変位が得られ、軸
方向変位を利用するものよりも偏平にできるの
で、小型化でき、かつ同寸法のものよりも変位が
大きくとれるため、その広用範囲も広く、実用的
価値の高い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。 In consideration of the above points, the present invention concentrically arranges a plurality of cylindrical piezoelectric ceramics with different diameters, each having a notch extending inward from the outer periphery, and alternating the ends of the notches of the piezoelectric ceramics. Its purpose is to obtain displacement that expands and contracts in the direction perpendicular to the cylindrical axis, and because it can be made flatter than those that use axial displacement, it can be made smaller and has less displacement than those of the same size. Since it can be made large, it can be used over a wide range of applications, and provides a cylindrical piezoelectric drive body of high practical value. 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平面
図及び断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
の一部の外周から内面側に切り欠きを入れた切欠
部が設けられ、かつ内外面に電極１ａ，１ｂが設
けられるとともに、分極処理が施された円筒形圧
電磁器１が配置され、この円筒型圧電磁器１の内
面側に、これと微少間隙をあけて、同様に一部の
外周から内面側に切り欠きを入れた切欠部が設け
られるとともに、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を配置
し、更に円筒形圧電磁器２の内面側に、これと微
少間隙をあけて、同様に一部の外周から内面側に
切り欠きを入れた切欠部が設けられるとともに、
内外面に電極３ａ，３ｂが設けられ、分極が施さ
れた円筒型圧電磁器３が配置されている。そし
て、円筒型圧電磁器１，２の切欠部の一方の端部
１１ｂ，１２ｂに、磁器または金属からなる連結
板４が有機質または無機質の接着材で接合され、
円筒形圧電磁器２，３の切欠部の他方の端部１２
ａ，１３ａに、磁器または金属からなる連結板５
が有機質または無機質の接着材で接合されてい
る。 1 and 2 show a plan view and a sectional 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
A notch is provided from a part of the outer periphery to the inner side, electrodes 1a and 1b are provided on the inner and outer surfaces, and a polarized cylindrical piezoelectric ceramic 1 is arranged. A notch is provided on the inner surface of the piezoelectric ceramic 1 with a slight gap therebetween, and a notch is similarly cut from a part of the outer periphery to the inner surface, and electrodes 2a and 2b are provided on the inner and outer surfaces. A polarized cylindrical piezoelectric ceramic 2 is arranged, and a notch is similarly cut from a part of the outer periphery to the inner surface with a slight gap between the cylindrical piezoelectric ceramic 2 and the inner surface of the cylindrical piezoelectric ceramic 2. At the same time,
Electrodes 3a and 3b are provided on the inner and outer surfaces, and a polarized cylindrical piezoelectric ceramic 3 is arranged. Then, a connecting plate 4 made of porcelain or metal is bonded to one end 11b, 12b of the notch of the cylindrical piezoelectric ceramic 1, 2 with an organic or inorganic adhesive,
The other end 12 of the cutout of the cylindrical piezoelectric ceramics 2 and 3
a, 13a, a connecting plate 5 made of porcelain or metal
are joined with an organic or inorganic adhesive.
このように、同心上に配列され円筒形圧電磁器
切欠部に相隣る端面を交互に連結したものは、最
外周の円筒型圧電磁器１の切欠部の端部１１ａと
最内周の円筒型圧電磁器３の切欠部の端部１３ｂ
との間で機械振動的に直列結合となる。従つて、
円筒形圧電磁器３の切欠部の端部１３ｂを固定
し、円筒形圧電磁器１の切欠部の端部に駆動部を
設け、それぞれの極性を同じくするように、たと
えば第２図に示したように、円筒型圧電磁器１，
２，３のそれぞれ電極１ａ，２ａ，３ａを（＋）
極に、電極１ｂ，２ｂ，３ｂを（−）極にして、
電気的に並列に結線して直流電圧を印加すると、
円筒形圧電磁器はその構成される磁器の圧電率ｄ
に従つて、印加電圧に比例した円環の径方向の伸
びを生じる。従つて、円筒型圧電磁器１の切欠部
の端部１１ａに設けられた駆動部には、円筒型圧
電磁器の伸びの和の変位が円筒軸と垂直の方向に
得られる。また電気極性を反転させることによつ
て、円筒軸と垂直方向変位が得られるので、機械
装置の微調整駆動源として利用できる。 In this way, the ends 11a of the notch of the outermost cylindrical piezoelectric ceramic 1 and the innermost cylindrical End portion 13b of the notch portion of the piezoelectric ceramic 3
There is a mechanical vibration series connection between the two. Therefore,
The end 13b of the notch of the cylindrical piezoelectric ceramic 3 is fixed, and a driving part is provided at the end of the notch of the cylindrical piezoelectric ceramic 1, so that the polarity of each part is the same, as shown in FIG. 2, for example. , cylindrical piezoelectric ceramic 1,
Electrodes 1a, 2a, 3a of 2 and 3 respectively (+)
With electrodes 1b, 2b, and 3b as (-) poles,
When electrically connected in parallel and applying DC voltage,
The piezoelectric constant d of the cylindrical piezoelectric ceramic is
Accordingly, a radial elongation of the ring occurs in proportion to the applied voltage. Therefore, the drive section provided at the end 11a of the notch of the cylindrical piezoelectric ceramic 1 obtains a displacement equal to the sum of the elongations of the cylindrical piezoelectric ceramic in a direction perpendicular to the cylinder axis. Furthermore, by reversing the electrical polarity, displacement in the direction perpendicular to the cylindrical axis can be obtained, so it can be used as a fine adjustment drive source for mechanical devices.
第３図は、本考案の他の実施例平面図を示した
もので、第１図の円筒型圧電磁器１，２のそれぞ
れの中央に切欠部を設けて、半円筒型圧電磁器１
Ａ，１Ｂおよび２Ａ，２Ｂを構成し、半円筒型圧
電磁器１Ａの端部１１ｂと半円筒型圧電磁器２Ａ
の端部１２ｂを連結板６で連結し、また半円筒型
圧電磁器２Ａの端部１２ａと円筒型圧電磁器３の
切欠部の一方の端部１３ａを連結板７で連結す
る。また、半円筒型圧電磁器１Ｂの端部１１ｃと
半円筒型圧電磁器２Ｂの端部１２ｃとを連結板８
で連結し、半円筒型圧電磁器２Ｂの端部２ｄと円
筒型圧電磁器３の他方の端部３ｂを連結板９で連
結すると、半円筒型圧電磁器１Ａと１Ｂの端部１
１ａと１１ｄを対向させることができる。 FIG. 3 shows a plan view of another embodiment of the present invention, in which a notch is provided in the center of each of the cylindrical piezoelectric ceramics 1 and 2 shown in FIG.
A, 1B and 2A, 2B, and the end portion 11b of the semi-cylindrical piezoelectric ceramic 1A and the semi-cylindrical piezoelectric ceramic 2A
The ends 12b of the semi-cylindrical piezoelectric ceramic 2A are connected by the connecting plate 6, and the end 12a of the semi-cylindrical piezoelectric ceramic 2A and one end 13a of the notch of the cylindrical piezoelectric ceramic 3 are connected by the connecting plate 7. Furthermore, the connecting plate 8 connects the end 11c of the semi-cylindrical piezoelectric ceramic 1B and the end 12c of the semi-cylindrical piezoelectric ceramic 2B.
When the end 2d of the semi-cylindrical piezoelectric ceramic 2B and the other end 3b of the cylindrical piezoelectric ceramic 3 are connected by the connecting plate 9, the ends 1 of the semi-cylindrical piezoelectric ceramics 1A and 1B are connected.
1a and 11d can be made to face each other.
なお、円筒形圧電磁器１，２，３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、円筒型圧
電磁器の切欠部を複数設けて、第３図に示したよ
うに駆動部と固定部を接近させたり、中心軸に対
して角度を設けたりすることは、当然本考案にお
いて実施されることである。また、本実施例で
は、円筒形圧電磁器を３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。 In addition, in order to adjust the electrical impedance of each of the cylindrical piezoelectric ceramics 1, 2, and 3, the thickness of each of the cylindrical piezoelectric ceramics may be changed, or a plurality of notches may be provided in the cylindrical piezoelectric ceramic to adjust the electrical impedance of each of the cylindrical piezoelectric ceramics 1, 2, and 3. As shown in the drawings, it is a matter of course that the driving part and the fixing part are brought close to each other or made at an angle with respect to the central axis, which is implemented in the present invention. Furthermore, in this example, an example was shown in which three cylindrical piezoelectric ceramics were used;
There is no limit to the number of them, and a plurality of them may be joined in tandem.
以上説明したように、本考案によれば、切欠部
を設けた円筒形圧電磁器の複数個を同心上に配列
して縦列接合することにより、円筒軸と垂直方向
に伸縮する変位が得られ円筒型圧電駆動体の軸方
向変位を利用するものよりも偏平にできるため
に、小形化去れ、かつ同寸法のものよりも変位が
大きく取れるので、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 arranging a plurality of cylindrical piezoelectric ceramics provided with notches concentrically and joining them in tandem, a displacement that expands and contracts in a direction perpendicular to the cylinder axis can be obtained. Since it can be made flatter than a type piezoelectric drive body that uses axial displacement, it can be made smaller and can have a larger displacement than a type of piezoelectric drive body of the same size, so it has a wide range of applications and has great practical benefits. There is.
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
施例の平面図である。
１，２，３……円筒形圧電磁器、１ａ，１ｂ，
２ａ，２ｂ，３ａ，３ｂ……電極、４，５，６，
７，８，９……連結板。
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 plan view of another embodiment of the present invention. 1, 2, 3... Cylindrical piezoelectric ceramic, 1a, 1b,
2a, 2b, 3a, 3b... electrode, 4, 5, 6,
7, 8, 9...Connection plate.
Claims (1)
ともに、内面及び外面に電極が設けられ、分極が
施され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、相隣る前記円筒形圧電磁器の切
欠部の端面がそれぞれ交互に連結板で連結され、
一方の終端部を固定し、他方の終端部を駆動部と
することを特徴とする円筒型圧電駆動体。 A plurality of polarized cylindrical piezoelectric ceramics with different diameters are arranged concentrically and have a notch cut inward from the outer periphery, electrodes are provided on the inner and outer surfaces, and the adjacent cylinders are arranged concentrically. The end faces of the cutout portions of the shaped piezoelectric ceramics are alternately connected by connecting plates,
A cylindrical piezoelectric drive body characterized in that one end portion is fixed and the other end portion is a drive portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6610182U JPS58168157U (en) | 1982-05-06 | 1982-05-06 | Cylindrical piezoelectric drive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6610182U JPS58168157U (en) | 1982-05-06 | 1982-05-06 | Cylindrical piezoelectric drive body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58168157U JPS58168157U (en) | 1983-11-09 |
| JPH0132748Y2 true JPH0132748Y2 (en) | 1989-10-05 |
Family
ID=30076000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6610182U Granted JPS58168157U (en) | 1982-05-06 | 1982-05-06 | Cylindrical piezoelectric drive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58168157U (en) |
-
1982
- 1982-05-06 JP JP6610182U patent/JPS58168157U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58168157U (en) | 1983-11-09 |
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