PIEZOELECTRIC BIMORPH DEVICE

摘要

PURPOSE:To enable driving conditions of a piezoelectric bimorph element to be adjusted with simple operations, by mounting a permanent magnet movably along the profile of the piezoelectric bimorph element as defined with the piezoelectric bimorph element is deformed. CONSTITUTION:A piezoelectric bimorph element 1 is fixed with its end fixedly interposed between an end edge of a case body 91 and an end of a cover 92. Two contact pieces 10a and 10b are inserted into the other end wall of the case body 91, and the piezoelectric bimorph element 1 is arranged such that the free end thereof comes into or out of contact with these contact pieces 10a and 10b. A slot 91a and a groove 91b are formed according to the profile of the piezoelectric bimorph element 1 as defined when it is deformed. A magnet 8 magnetized in the direction orthogonal to the longitudinal axis is mounted. The magnet 8 has a slidable guide shaft 81 at one end and a guide shaft 82 serving also as a lug at the other end, and is slidable along the slot 91a and the groove 91b. Accordingly, the position (x) of the magnet 8 can be adjusted easily.