| 20120098388 | DOME-SHAPED PIEZOELECTRIC LINEAR MOTOR - The present invention relates to a dome-shaped piezoelectric linear motor, and provides a piezoelectric linear motor having enhanced displacement using dome-shaped piezoelectric ceramic. A dome-shaped piezoelectric linear motor (DSPLM) comprises: a dome-shaped piezoelectric ceramic actuator which has two surfaces applied with different electrodes; a bar-shaped vibration shaft which is vertically fixed at the apex of the dome-shaped piezoelectric ceramic actuator; a cylinder-shaped mobile element which is inserted into the vibration shaft and moves linearly along the vibration shaft; and a ceramic restraining element which is fixed at a lower edge portion of the dome-shaped piezoelectric ceramic actuator. Therefore, the vibration displacement in the direction of the vibration shaft is increased when compared to the vibration displacement in the thickness direction of planar piezoelectric ceramic. | 04-26-2012 |
