Patent ID: 7514845

Claim:
A vibrational actuator, comprising: an oscillator that generates vibrational energy; a mover that is rotationally driven around a first axis by the vibrational energy; an output shaft that rotates around a second axis by a rotational drive of the mover; a flange portion that disposes the mover between the oscillator and the flange portion, rotates together with the output shaft, and is movable relative to the output shaft; a regulating member that regulates a position of the flange portion relative to the output shaft; the output shaft is capable of titling relative to the mover within a predetermined range in angle formed by the first axis and the second axis; a distance from the first axis to an outer border of an area where the mover is pressed against the flange portion is set to a value large enough to prevent the first axis and the second axis from becoming tilted relative to each other; and the regulating member comprises a retaining ring fitted inside a groove formed at the output shaft.