PIEZO MOTOR AND LENS ASSEMBLY HAVING THE SAME

摘要

PURPOSE: A piezoelectric motor and a lens assembly thereof are provided to improve abrasion resistance and durability by alleviating stress concentration between a rotor and a stator. CONSTITUTION: A piezoelectric motor comprises a stator(10) and a rotor(20). A piezoelectric element(30) is combined in the first surface of the stator. A plurality of supporting protrusions(15) are formed on the second surface of the stator. A curved part is formed in the top surface and the contact part of the supporting protrusion. The rotor is compressed to the surface of the stator. The rotor revolves along the bending wave of the stator.