Method for assembling ultrasonic motor

摘要: An ultrasonic motor includes a stator having piezoelectric element and rotor facing the stator. The vibrates to rotate rotor. A lining member is located between spring installed in motor. deformed by predetermined amount press against force of pressing changes accordance with deformation spring. such that its range, so that, within urging relatively small for given change deformation. Therefore, when due wearing member, disk scarcely changes. Accordingly, rotation characteristics over time.