Patent ID: 8970091
Filing Date: 2015-03-03
Classification: H02N

Abstract:
1. A vibration-type driving apparatus comprising: a vibration member to which an electrical-mechanical energy conversion element is fixed and which is vibrated when a driving voltage is applied to the electrical-mechanical energy conversion element; a moving member that comes into contact with the vibration member and rotates relative to the vibration member in accordance with the vibration, wherein the moving member includes a first portion and a second portion including a contacting portion with a friction surface that comes into frictional contact with the vibration member, the moving member being of an annular shape with an inner wall adjacent to a rotation axis and an outer wall at an outer periphery; and an intermediate member in contact with the first portion and having an elasticity lower than that of the first portion, wherein the intermediate member and the first portion are separate members, wherein the second portion is elastically deformable, and wherein, in a radial sectional area of the moving member extending from the inner wall to the outer wall, a line connecting a centroid of a shape of the radial sectional area of the moving member to a point of the contacting portion of the moving member is parallel to a direction of the vibration trajectory of the vibration member.