| 摘要 |
PURPOSE:To obtain an ultrasonic vibrator which is compact and has a large output without any damage during drive by providing a rod-shaped elastic body and a plurality of vibration-application means for applying vibration to a plurality of nodes at the resonance flex vibration at an ultrasonic vibrator and then shifting a plurality of vibration-application means in the vibration-application direction for other adjacent vibration-application means. CONSTITUTION:A bottom surface 11a and a side surface 11b of a base member 11 whose section is in L shape are formed at 90 degrees each other, lamination-type piezoelectric elements 12a and 12b are fixed in mutually vertical directions, and then retention members 14a and 14b for retaining a node at resonance flex vibration of an elastic body 13 are provided at each tip part, where a drive frequency voltage with a same frequency as a resonance frequency of the elastic body 13 is applied to the lamination-type piezoelectric element 12a and a resonance flex vibration with an amplitude in z-axis direction is generated at the elastic body 13. Furthermore, when a drive frequency voltage with a same frequency and with its phase being shifted by 90 degrees is applied to the lamination-type piezoelectric element 12b, the other node is vibrated in y-axis direction and a film of resonance flex vibration in the elastic body 13 performs rotary motion on y-z plane. |
