| 摘要 |
<p>PURPOSE:To facilitate housing a structure in which ribbon shape metal plates and piezoelectric plates are alternately laminated into a case as it is by a method wherein grooves are provided along the longitudinal direction of the case and the bent parts of the ribbon shape metal plates, which are to be electrode plates, are inserted into the grooves. CONSTITUTION:After a piezoelectric plate 10 is set on the first metal plate 11, the second metal plate 12 is set on the upper surface of the piezoelectric plate 10. Then, after the other piezoelectric plate 10 is set on the second metal plate 12, the first metal plate 11 is bent at the bent parts 11a and four plates are laminated. This laminated unit A is housed into a resin case 13 which has a cylindrical circumference altogether. As the bent parts 11a and 12 a of the metal plates 11 and 12 are inserted into the grooves 13a of the case 13 and the circumference of the piezoelectric plates 10 are fixed from four directions by the inner walls of the case 13, even if required voltage and frequency are applied to the laminated piezoelectric unit, relative positions between the piezoelectric plate 10 and the metal plates 11 and 12 are not varied.</p> |
