| 摘要 |
Disclosed is an electrostrictive effect element comprising a columnar casing having openings on either end, laminated blocks with a laminated ceramic capacitor structure. The laminated blocks are stacked in the casing and electrically connected to each other and have a sufficient number of electrostrictive material layers formed to prevent mechanically damaged due to stress generated when a voltage is applied. The electrostrictive effect also includes means which is disposed outside the casing and made of a spring or the like for applying a compressive force to said laminated blocks in the lamination direction thereof, and engaging members which are engaged with said laminated blocks for applying a compressive force through said compression means to said laminated blocks. The electrostrictive material layers of each laminated block are not damaged due to stress, and the adjacent laminated blocks are deformable at the contact surface thereof, so that stress generated in each laminated block can be dispersed at the contact surface with the adjacent one. It is preferable that the casing has a cross-sectional shape substantially equal to that of each laminated block and two windows on its side surfaces opposing to each other.
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