Patent ID: 6078438
Filing Date: 2000-06-20
Classification: G02B,H02N

Abstract:
A vibration actuator drive device, comprising:a vibration actuator to generate a first vibration and a second vibration to produce a drive force;a relative motion member contacting the vibration actuator and undergoing relative motion with respect to the vibration actuator in a curved line locus of predetermined amplitude;a compression mechanism to place the vibration actuator and the relative motion member in compressive contact,wherein the first vibration vibrates in a direction approximately parallel to the direction of the drive force, the second vibration vibrates in a direction intersecting the first vibration, and the drive force is transmitted to the relative motion member at an inner circumferential side of the curved line locus of the relative motion member and at an outer circumferential side of the curved line locus, the drive force transmitted to the inner circumferential side and the drive force transmitted to the outer circumferential side being different in magnitude.