Vibration type actuator
AssigneeCanon Kabushiki Kaisha
InventorsJun Tamai, Satoru Kitajima
Life of this patent
Estimating the term…
Abstract
A vibration type actuator has an elastic member in which a shaft center portion is formed in hollow shape along an axial direction and in which driving vibration is generated in a driving portion, a fastening member which fastens the elastic member to an electro-mechanical energy conversion element, an output shaft which penetrates the shaft center portion of the elastic member, a moving member which is kept in press contact with the driving portion of the elastic member and which rotates together with the output shaft, and a bearing member which is located between an inner periphery portion of the elastic member and a distal end portion of the fastening member and which journals the output shaft.
Claims18
A vibration type actuator comprising:
- an elastic member having a hollow central portion formed along an axial direction thereof, and a driving portion in which driving vibration is generated;
- a fastening member located on an inner periphery portion of said elastic member, which fastens said elastic member to an electro-mechanical energy conversion element;
- an output shaft which penetrates the hollow central portion of said elastic member;
- a moving member in press contact with the driving portion of said elastic member, and which rotates together with said output shaft;
- and
- a bearing member located between said elastic member and said fastening member and which journals said output shaft.
A vibration type actuator comprising:
- a plurality of elastic members each having a hollow central portion formed along an axial direction thereof, and a driving portion in which driving vibration is generated;
- an electro-mechanical energy conversion element interposed between said plurality of elastic members;
- a fastening member having a hollow central portion formed along an axial direction thereof, said fastening member being located on an inner periphery portion of said plurality of elastic members and fastening said plurality of elastic members to said electro-mechanical energy conversion element;
- an output shaft which penetrates the central portions of said plurality of elastic members and which is restrained from slipping off outward in an axial direction;
- a plurality of moving members, respectively in press contact with the driving portions of said plurality of elastic members and which rotate together with said output shaft;
- and
- at least one bearing member respectively located between one of said plurality of elastic members and a respective end portion of said fastening member and which journals said output shaft.
Dependencies are inferred from the claim text.