JPH0326288U

JPH0326288U -

Info

Publication number: JPH0326288U
Application number: JP7135088U
Authority: JP
Priority date: 1988-05-30
Filing date: 1988-05-30
Publication date: 1991-03-18

Description

[Brief explanation of drawings]

第１図は本考案によるリング状の積層型圧電ア
クチユエータで、外部電極が内径側にある場合を
示す図。ａは平面図、ｂは縦断面図。第２図は本
考案によるリング状積層型圧電アクチユエータで
、外部電極が外径側溝に取り付けた場合を示す図
。ａは平面図、ｂは縦断面図。第３図は、第１図
に示す外部電極を内径側に取り付けたリング状の
積層型電圧アクチユエータを構成する圧電セラミ
ツクスと、内部電極構造を示す斜視図。第４図は
、第２図に示す外部電極を外径溝に設けるリング
状の積層型圧電アクチユエータを構成する圧電セ
ラミツクスと内部電極構造を示す斜視図。第５図
は従来構造のリング状積層型圧電アクチユエータ
を示す図。ａは平面図、ｂは縦断面図。１１……圧電セラミツクス、１２……内部電極
、１３，２３，３３……外部電極、１４……半田
付け、１５……リード線、１６……内部電極切り
欠き部、１７……溝。 FIG. 1 is a diagram showing a ring-shaped laminated piezoelectric actuator according to the present invention, in which the external electrode is located on the inner diameter side. A is a plan view, and b is a vertical cross-sectional view. FIG. 2 is a diagram showing the ring-shaped laminated piezoelectric actuator according to the present invention, in which the external electrode is attached to the outer groove. A is a plan view, and b is a vertical cross-sectional view. FIG. 3 is a perspective view showing piezoelectric ceramics constituting the ring-shaped multilayer voltage actuator with the external electrode shown in FIG. 1 attached to the inner diameter side, and the internal electrode structure. FIG. 4 is a perspective view showing piezoelectric ceramics and internal electrode structure constituting the ring-shaped laminated piezoelectric actuator shown in FIG. 2, in which the external electrode is provided in the outer diameter groove. FIG. 5 is a diagram showing a ring-shaped laminated piezoelectric actuator with a conventional structure. A is a plan view, and b is a vertical cross-sectional view. 11... Piezoelectric ceramics, 12... Internal electrode, 13, 23, 33... External electrode, 14... Soldering, 15... Lead wire, 16... Internal electrode notch, 17... Groove.

Claims

[Claims for Utility Model Registration] 1. A plurality of ring-shaped internal electrodes that constitute mutually opposing electrodes are stacked in the length direction, and on the inner diameter surface of the ring, the internal electrodes are arranged every other layer to two external electrodes. A ring-shaped laminated piezoelectric actuator characterized by having a connected structure. 2. In a ring-shaped laminated piezoelectric actuator configured by laminating internal electrodes facing each other in the length direction, a groove is provided on the outer diameter surface of the ring over the entire length in the outer diameter direction, and the inner electrodes constituting the laminated actuator are 1. A ring-shaped laminated piezoelectric actuator characterized in that two external electrodes are provided in an outer diameter groove for driving every other layer.