Patent ID: 7432633

Claim:
An ultrasonic driving apparatus comprising: an oscillator for generating vibrations when supplied with electrical power; a holding member fixed to the oscillator; an urging member for urging the oscillator in a predetermined direction; and a support member for supporting the holding member so as to be capable of moving in the predetermined direction, wherein positioning portions for setting, with a certain degree of precision, the position of the oscillator which is projected onto a plane substantially orthogonal to the predetermined direction are provided in the holding member and the support member; the holding member includes a pair of side-wall portions which sandwich at least the oscillator in a direction intersecting the predetermined direction; the positioning portions include projections that protrude from the side-wall portion-and groove portions, extending in the predetermined direction in opposing faces that contact the side-wall portions, for accommodating the projections in such a manner that the projections are capable of moving in the predetermined direction; the holding member includes a base portion that joins the pair of side-wall portions; the oscillator is pressed by the urging member, via the base portion; and the base portion is fixed at a contact face contacting the oscillator.