Patent ID: 8786163
Filing Date: 2014-07-22
Classification: G02B,H02N

Abstract:
1. A vibrational wave motor comprising: a motor main body; and a pressing member, wherein the motor main body comprises: an electromechanical conversion element configured to be excited by a driving signal; an elastic body configured to be joined to the electromechanical conversion element and generate an oscillating wave by an excitation thereof; and a relative motion member configured to be in pressure contact with the elastic body and rotationally driven relatively with respect to the elastic body by the oscillating wave, wherein the pressing member is configured to generate a pressing force between the elastic body and the relative motion member, and wherein the pressing member comprises: a pressure applying portion configured to press one of the elastic body and the relative motion member towards the other, along a rotation axis of rotational driving; an extension portion configured to extend from the pressure applying portion towards an outer side in a radial direction centered about the rotation axis; and a pressing main body disposed further to the outer side in the radial direction than the motor main body at the extension portion, wherein the pressing main body includes a pressed portion configured to be continuous from the extension portion and pressed along an axis parallel to the rotation axis, and wherein the pressed portion is configured to be pressed by a compression spring.