A vibration driven actuator.

摘要

A vibration driven motor or actuator includes a vibrating member for generating a vibration therein in response to an electrical signal applied thereto, and a contact member frictionally engaged with the vibrating member to be driven by the vibration. The contact member has an element for, when the contact member is driven by the vibration, causing sin and cos modes of the vibration generated in the contact member to have different natural frequencies. <IMAGE>