Patent ID: 8466602
Filing Date: 2013-06-18
Classification: G02B,H01L,H02N

Abstract:
1. A linear driving device, in which a movable body that is frictionally contact with a driving shaft slides along an axial direction of the driving shaft, the linear driving device comprising: a vibration member including a piezoelectric element that expands and contracts by applying electricity, and a vibrator made of a metal plate having elasticity, wherein the vibrator is fixed to the piezoelectric element by superimposing plate faces thereof; and a driving shaft having an end fixed to the vibration member, which vibrates in the axial direction due to vibration of the vibration member; wherein the driving shaft has a trunk along which the movable body slides, and an end portion fixed to the vibrator, a base surface of the end portion abuts with and is fixed to the vibrator, and an area of the abutting portion is smaller than a cross sectional area of the trunk.