Laminierter piezoelektrischer Antrieb

摘要

There is provided a laminated piezoelectric actuator in which a plurality of electrostrictive effect elements are connected with each other, each element 1 comprising a structure alternately laminated with electrostrictive material layers and internal electrode layers, and are sealed with an enclosure consisting of a metallic casing 5 and at least one metallic member 3 and 6 fixed to an aperture of the casing 5. The actuator comprises a supporting member 7 for connecting and positioning the elements 1 in their longitudinal displacing direction, and the supporting member 7 has a notch formed on its opposed lateral surfaces through which leads connected to the plurality of electrostrictive effect elements are led out. In the actuator, even if the voltage is repeatedly turned on and off, the crack cannot take place on the electrostrictive material layer or the connecting portion cannot slip off.