Patent ID: 7078847

Claim:
A piezoelectric actuator comprising: a base frame; a motion stimulator including a support member and a vibrating plate in which a piezoelectric element and a reinforcing portion are stacked; a rotor having an outer peripheral surface, rotationally supported on the base frame; wherein the support member has a fixing portion fixed to the base frame and supports the vibrating plate on the base frame; and an elastic member for providing an elastic force to the rotor so that the outer peripheral surface of the rotor abuts against a longitudinal end of the vibrating plate; a rotor support member including a shaft, said shaft being configured to support the rotor; wherein, when the piezoelectric element vibrates in the longitudinal direction of the vibrating plate, the vibrating plate is vibrated by the vibration, and the rotor is driven; and wherein said rotor support member is a rotating member and its shaft is movable in a circular arc so as to permit the rotor to move in a circular arc.