Patent ID: 6091179
Filing Date: 2000-07-18
Classification: H02N

Abstract:
A drive device for moving at least one element, the drive device comprising:a vibration actuator assembly comprising a vibration actuator and a rotatable roller element,the vibration actuator comprising an elastic member having at least one driving section and at least one electro-mechanical converting element that generates an ellipsoidal vibration occurring on a plane in the at least one driving section of the elastic member;the roller element comprising a first part contacting the at least one driving section of the elastic member and a second part separate from the first part contacting the at least one element, the second part of the roller element having a diameter that is different from a diameter of the first part of the roller element;wherein the at least one electro-mechanical converting element vibrates the at least one driving section of the elastic member, the at least one driving section transfers the vibration to the first part of the roller element to rotate the roller element and the at least one element is moved linearly by rotation of the second part of the roller element.