Patent ID: 8283838

Claim:
A piezoelectric linear motor for providing enhanced displacement, comprising: a dome-shaped piezoelectric ceramic defining different electrodes on opposite surfaces thereof, the piezoelectric ceramic being deflectable when electrically energized upon different voltages applied to the electrodes, the piezoelectric ceramic having an arcuate sectional contour when undeflected; an elastic plate attached on the dome-shaped piezoelectric ceramic, the elastic plate straining the piezoelectric ceramic; a vibration shaft fixed to a first surface of the elastic plate so that the vibration shaft moves in conjunction with displacement of the piezoelectric ceramic and the elastic plate, a moveable direction of the dome-shaped piezoelectric ceramic equal to a moveable direction of the vibration shaft while the dome-shaped piezoelectric ceramic carrying the movement of the elastic plate and the vibration shaft; and a movable element linearly driven through friction with the vibration shaft while coming into contact with the vibration shaft.