Patent ID: 6765334
Filing Date: 2004-07-20
Classification: H02N

Abstract:
A linear motion mechanism comprising:a supersonic motor having a rotor which is rotationally driven by vibration of a vibrating body having a piezoelectric element; a transmission member disposed on the rotor for rotation therewith, the transmission member having a tapered portion varying in thickness along a direction generally perpendicular to a longitudinal axis of the rotor; a moving body having an end portion in contact with the transmission member for undergoing linear movement in a direction generally parallel to the longitudinal axis of the rotor in accordance with rotation of the transmission member, the moving body having a tapered portion contacting the tapered portion of the transmission member, the tapered portion of the moving body having a thickness which varies along a direction generally perpendicular to the longitudinal axis of the rotor; and a pressurizing mechanism pressing the moving body into pressure contact with the transmission member.