Drive device

Details Drive device Drive device

1998-11-09

2000-11-28

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4106

Patent

active

061539635

ABSTRACT:
A drive unit 20, comprising a moving body 24 and a friction drive member 26 fixedly attached at each end of a piezoelectric element 22 in the layer direction, is disposed between a pair of fixed friction members 14 having a plurality of divided contact parts 15 divided by notches 14s formed at equal spacing along the movement path of the friction drive member 26. The divided contact parts 15 are arrayed so as to be slightly inserted into the movement path of the friction drive member 26, and become elastically deformed when in contact with the friction drive member 26 so as to exert a force on friction drive member 26 in reaction thereto. This exerted force remains uniform regardless of the relative position of the friction drive member 26.

REFERENCES:
patent: 3246608 (1966-04-01), Cooper
patent: 3377489 (1968-04-01), Brisbane
patent: 3808488 (1974-04-01), Massa
patent: 4219755 (1980-08-01), O'Neill et al.
patent: 4736131 (1988-04-01), Fujimoto
patent: 4777398 (1988-10-01), Shibuya
patent: 4947077 (1990-08-01), Murata
patent: 5225941 (1993-07-01), Saito et al.
patent: 5589723 (1996-12-01), Yoshida et al.
patent: 5631517 (1997-05-01), Kato et al.
patent: 5786654 (1998-07-01), Yoshida et al.

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