Patent ID: 9644624
Date: 2017-05-09
CPC Classifications: F04B,F04D,H01L

Claim:
1. A piezoelectric actuator comprising: a vibration sheet having a first principal surface and a second principal surface opposite the first principal surface; a reinforcing member bonded to the first principal surface of the vibration sheet; a first piezoelectric element that extends and contracts when an alternating current voltage is applied to the piezoelectric actuator and that is bonded to the reinforcing member opposite the vibration sheet; a second piezoelectric element that extends and contracts in a phase opposite to the first piezoelectric element when the alternating current voltage is applied to the piezoelectric actuator and that is bonded to the second principal surface of the vibration sheet; and a fixing member directly fixed to and abutting to one end of the vibration sheet, wherein the first piezoelectric element and the second piezoelectric element each comprise a piezoelectric ceramic with electrode films on opposed surfaces thereof.