| 摘要 |
PURPOSE:To increase the pressure on the tip of a piezoelectric driver employing piezoelectric bimorph elements, by using obtusely-bent rigid members to couple the small-width ends of the plural trapezoidal bimorph elements each other and by radially coupling their large-width ends to driving terminals to shape the piezoelectric driver as a lantern. CONSTITUTION:The large-width ends 1A of trapezoidal piezoelectric bimorph elements 1 are radially coupled to elastic driving terminal 2, 2' and the small- width ends 1B of the elements are coupled to each other by obtusely-bent rigid members 3 so that the whole assembly is shaped as a lantern. To construct each trapezoidal piezoelectric bimorph element 1, trapezoidal piezoelectric porcelain pieces 5, 6 of lead zircotitanate or the like which are provided with silver electrodes are bonded on both the sides of a thin metal sheet 7. The piezoelectric bimorph elements 1 are thus connected in parallel with one another so that the driving terminals 2, 2' are displaced in the direction of the center line of the assembly and a force corresponding to the number of the bimorph elements is caused. This results in increasing the pressure on the tip of the assembly. |
