| 摘要 |
PURPOSE:To obtain a piezo-electric actuator which can obtain a large displacement by bringing the end part of one of doubly provided piezo-electric element laminated bodies into contact with an output shaft while the end part of the other into contact with a case and connecting both of said laminated bodies with a holder. CONSTITUTION:Laminated bodies 14 consisting of piezo-electric elements are at least doubled, and the end part of an inside piezo-electric element is brought into contact with an output shaft 8 while the end part of an outside piezo-electric element is brought into contact with a case 13. Since both the piezo-electric elements are connected by holders 17a, 17b, the displacement quantity of the piezo-electric elements can be increased without need for increasing the length of the piezo-electric elements, obtaining a piezo-electric actuator having a large displacement.
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