Drive apparatus having auxiliary springs

Details Drive apparatus having auxiliary springs Drive apparatus having auxiliary springs

2007-02-13

2010-06-15

SanMartin, J. (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323010, C310S328000

Reexamination Certificate

active

07737610

ABSTRACT:
Provided is a self-propelled drive apparatus that enables stable drive and low cost, the apparatus includes: a movable member which has an electromechanical transducer whose one end is fixed to the movable member and the other end is fixed to a drive friction member, which is movably supported by the movable member movably in the first direction, which represents a extension-contraction direction A-B of the electromechanical transducer, where the movable member is supported movably in the first direction; a pair of plate springs which extend in a belt shape in the first direction and sandwich the drive friction member; a base member holding the plate springs in a cantilever manner in the direction of the short sides of the plate springs; and auxiliary springs disposed on the outside of the plate springs to apply elastic force only to both ends of each of the plate springs.

REFERENCES:
patent: 6114799 (2000-09-01), Yoshida et al.
patent: 6384493 (2002-05-01), Okamoto
patent: 10-084649 (1998-03-01), None
patent: 10-225150 (1998-08-01), None
patent: 2000-278972 (2000-10-01), None
patent: 2004-080964 (2004-03-01), None
patent: WO 2007/105396 (2007-09-01), None
International Search Report in International Application No. PCT/JP2007/052482, dated May 8, 2008, 1 page.

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