| 摘要 |
PURPOSE:To make the linearity to the impressed voltage excellent and also obtain a large displacement by a method wherein at least more than one slit with an opening on one side thereof is formed on the electrostrictive substrate which is displaced flexibly and, by using the slit as a boundary, the flexible displacement is turned reversely by the polarization treatment. CONSTITUTION:Piezoelectric plates 4 and 5 are arranged on both surfaces of a negative electrode 2 and the component thus prepared is held by positive electrodes 1 and 3 in between, whereby a bimorph plate. Next, a plurality of slits 8 with openings on one sidethereof are cut in the bimorph plate, the polarization treatment is applied thereto by using the slits as boundaries, and fixed stands 6 are fixed to the side of electrodes 3 at the divided ends of the bimorph plate positioned on both ends. By providing the slits 8 in this way, the length l in the direction of displacement is increased, the piezoelectric plates 4a and 4c divided by the slits 8 are extended in the direction of l when the positive voltage is impressed on the electrodes 1 and 3 and the negative voltage on the electrode 2, while piezoelectric poles 5a and 5c are made to shrink. In addition, the piezoelectric poles 4b and 5b are made to extend, and thus the large displacement is caused as a whole. |
