| 摘要 |
PURPOSE:To provide a method of assembling an oscillator by which piezoelectric elements can be stacked integrally without causing phase shift while a constant force is being applied to them. CONSTITUTION:Piezoelectric elements 1a, 1b, 2a, 2b, 3a, 3b, 11 and electrodes 4, 5, 6, 7 are stacked between front and rear metal blocks 8, 9 and a semi- assembled oscillator is set vertically before a tightening bolt 10 is inserted while the lower end face of a lower metal block is mounted on a fixed table 20. Under that state, the metal blocks 8, 9 are pressed on the upper end faces thereof by means of a pre-load head. The front and rear metal blocks are then subjected to axial force in the direction of the end faces thereof to exert a predetermined compression stress onto the piezoelectric elements and then the front and rear metal blocks are tightened by means of tightening bolts. Consequently, the oscillator can integrally be assembled without requiring strong tightening of the tightening bolts and without causing phase shift between the piezoelectric elements. |
