| 摘要 |
PURPOSE:To apply large driving force to a body to be driven brought into contact with a driving end section by driving a piezoelectric body by driving frequency coinciding with the resonance frequency of an element constituting a drive device. CONSTITUTION:When an AC voltage is applied to a piezoelectric body 1, the piezoelectric body 1 is vibrated and displaced, a driving end section 8 is vibrated and displaced through a flexible mechanism 7, and a body to be driven 9 receives the vibration displacement of the driving end section 8 and is driven in one direction. When the piezoelectric body 1 is vibrated, the vibration displacement of the driving end section 8 displays frequency characteristics determined by the rigidity of the piezoelectric body 1 and the flexible mechanism 7 and the effective mass of the piezoelectric body 1, the flexible mechanism 7 and the driving end section 8. The frequency of AC voltage applied to the piezoelectric body 1 is set near the resonance point of the frequency characteristics, thus expanding the fine displacement of the piezoelectric body 1, then transmitting it over the driving end section 8. |
