Driving device capable of reducing height thereof
AssigneeMitsumi Electric Co., Ltd.
InventorsTsukasa Yamada, Soumei Takahashi
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Abstract
A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion mounted to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. A frictionally coupled portion has a height (a length of the vibration friction portion in a sliding direction in contact with the moving portion) which is not more than 1.15 mm.
Claims8
A driving device comprising:
- an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction;
- a stationary member coupled to the first end portion of said electro-mechanical transducer;
- a vibration friction portion mounted to the second end portion of said electro-mechanical transducer;
- and
- a rod-shaped moving portion frictionally coupled to said vibration friction portion, said moving portion being movable in the expansion/contraction direction of said electro-mechanical transducer,
- wherein said vibration friction portion has a length in a sliding direction in contact with said moving portion that is not more than 1.15 mm.
Dependencies are inferred from the claim text.