| 摘要 |
PURPOSE:To obtain a large amount of displacement in a small size by a method wherein a plurality of piezo-electric substrates which displace in the longitudinal direction are arranged in parallel in the longitudinal direction, the adjacent substrates are fixed on one end in the longitudinal direction, and further the displacement in the longitudinal direction of those adjacent substrates is reversed. CONSTITUTION:After the piezo-electric substrates 1a, 1b, 1c constituted of Ti-Zr acid Pb porcelain are arranged in parallel, adjacent piezo-electric substrates 1a, 1b and 1b, 1c are fixed at the end part thereof on one end reversed each other by epoxy resin adhesives 2a, 2b. One of free ends is fixed on a support base 4 by the adhesive resulting in the reference for the measurement of the amount of displacement. A DC voltage is impressed among three pairs of electrodes 5a, 5b, 5c, 5d, and 5e, 5f of the displacement element 7 in the direction wherein the piezo-electric substrate 1b contacts when the piezo-electric substrates 1a, 1c expand and 1b expands when 1a, 1c contract. As a result, the displacement of the free end 6 in the displacement element 7 is obtained at approx. three times of that in a conventional one in a state that the length of the displacement element is the same. |
