Patent ID: 7791796

Claim:
A motorized table apparatus, comprising: a support unit for supporting a movement table so as to allow the movement table to move in a single axis direction relative to a stationary unit which is fixed to the movement table; one or more slide members at least one of which is equipped on the movement table and has a length equivalent to, or more than, a moving range of the movement table; and a plurality of ultrasonic oscillators each of which is equipped on the stationary unit, moves the movement table, and includes a single piezoelectric body, two drive elements, and a pressure application unit that presses the two drive elements against one of the one or more slide members by a constant force; wherein a pressing direction in which the pressure application unit of each of the plurality of ultrasonic oscillators presses the one or more slide members is a side surface direction toward a side surface of the movement table and is a direction perpendicular to a moving direction of the movement table.