A PIEZO SCANNER DEVICE

摘要

A piezo scanner apparatus is provided to prevent stress concentration during a repeated driving of an actuator, thereby ensuring stable driving. A piezo scanner apparatus(100) comprises a rotor(110), a piezo-electric actuator(120), an elastic member(130) and a base(140). One or more reflecting members(101) are mounted on the rotor. A friction member(121) is positioned in a front end of the piezo-electric actuator. The friction member contacts the rotor. The piezo-electric actuator provides external force for rotating the rotor. The external force is generated by bending and elastic deformation of the piezo-electric actuator when power is applied. The elastic member provides elastic force for pressurizing the piezo-electric actuator towards the rotor in order to maintain a contacting state between the rotor and the friction member. The base comprises axis supporting parts(141a,141b), an actuator arrangement part(142) and an insertion fixation part(143). A rotation shaft(111a) of the rotor is pivotally assembled in the axis supporting part. The piezo-electric actuator is arranged in the actuator arrangement part. The elastic member is fixed to the insertion fixation part.