Patent ID: 9362850
Filing Date: 2016-06-07
CPC Classification: H02N

Claim Text:
1. A vibration type driving apparatus comprising: a vibrating body in which an electrical-mechanical energy converting element is provided between a first elastic body and a second elastic body; and a moving body that comes into contact with the vibrating body and moves relative to the vibrating body, wherein the vibrating body has a third elastic body between the first elastic body and the electrical-mechanical energy converting element, wherein the third elastic body extends in a direction perpendicular to an axial direction of the vibrating body and includes a sliding surface further outside than the external diameter of the electrical-mechanical energy converting element, and the moving body slides on the sliding surface, wherein the vibrating body has a plurality of natural vibration modes in which displacement directions and orders are the same and relative proportions of displacements at end portions of the vibrating body in an axial direction are different, and wherein a resonance frequency in a mode where the non-sliding surface side of the vibrating body in the axial direction mainly vibrates with the third elastic body as a border is configured to fall out of a frequency range between a multiple of a maximum frequency of a driving signal applied to the electrical-mechanical energy converting element, and a multiple of a minimum frequency of the driving signal.