Patent ID: 8288919

Claim:
A vibratory actuator which is movable relative to a relatively-movable member, the vibratory actuator comprising: an actuator body having a pair of principal surfaces facing each other, and generating stretching vibration in a longitudinal direction of the principal surface and bending vibration in a lateral direction of the principal surface; driver elements provided to the actuator body, and outputting drive force by generating orbit motion in response to the vibrations of the actuator body; protrusions provided to the actuator body, and protruding outwardly beyond the principal surfaces in a direction crossing the principal surfaces; two supports for supporting the protrusions; and contact bodies contacting one of the principal surfaces of the actuator body, and limiting displacement of the actuator body in the direction crossing the principal surfaces, wherein the actuator body is biased toward the relatively-movable member; a long hole extending in a biasing direction of the actuator body and into which the protrusion is fitted is formed in the support; and at least two contact bodies contact the principal surface of the actuator body at different positions in the longitudinal direction.