Patent ID: 8848272

Claim:
A piezoelectric actuator comprising: a first actuator including a first piezoelectric driving part, a central portion of the first actuator in a longitudinal direction of the first actuator being supported, the first actuator configured to be bent and deformed by applying a first driving voltage to the first piezoelectric driving part, so that both end portions of the first actuator in the longitudinal direction are displaced in a thickness direction of the first actuator; and a second actuator including a second piezoelectric driving part, both end portions of the second actuator in a longitudinal direction of the second actuator being coupled to the both end portions of the first actuator, the second actuator configured to be bent and deformed in an opposite direction to the first actuator by applying a second driving voltage to the second piezoelectric driving part, so that a central portion of the second actuator in the longitudinal direction of the second actuator is displaced in a thickness direction of the second actuator.