| 摘要 |
PURPOSE: To provide an ultrasonic vibrator which does not require two kinds of piezoelectric elements, which can be simplified in constitution and driven by a low voltage. CONSTITUTION: An ultrasonic vibrator 10 is provided with a square pillar-shaped elastic body 11 and with a drive element 15 in which a plurality of laminated piezoelectric elements installed at least on two faces out of faces parallel to the length direction of the elastic body 11 in such a way that their respective displacement directions form an acute angle with the length direction of the elastic body 11 are installed on edges in the length direction of the elastic body 11. The ultrasonic vibrator is constituted in such a way that alternating voltages having a phase difference from each other are applied to the plurality of laminated piezoelectric elements and that longitudinal resonance vibrations are generated along the length direction in the elastic body 11. |
