| 摘要 |
PURPOSE: To provide an ultrasonic vibrator having a simple configuration, permitting low voltage drive and a node position for longitudinal vibration aligned with the node position of torsional vibration. CONSTITUTION: An ultrasonic vibrator is provided with a columnar elastic body 11 having a plurality of grooves 12 and 13 at predetermined positions on the outer periphery, a plurality of laminated type piezoelectric elements 14 arranged in a slanted state on at least two facing sides of the columnar elastic body 11, and a sliding friction element 18 bonded to the end face of the columnar elastic body 11; and by applying alternating voltages with different phases respectively to a plurality of laminated type piezoelectric elements 14, a resonant longitudinal vibration and a resonant torsional vibration can be excited at the same time, thereby generating an ultrasonic elliptical vibration on the surface of the sliding friction element 18. |
