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US 4,736,131 AGranted
Linear motor driving device
AssigneeNEC Corporation
InventorToshitaka Fujimoto
Life of this patent
Estimating the term…
Abstract
A linear motor driving device includes a pair of actuators each having a first piezoelectric element, a pair of levers connected to the first piezoelectric element, and an apparatus for magnifying the displacement caused by the first piezoelectric element. A second piezoelectric element is connected to the pair of actuators. The second piezoelectric element translates the levers in a direction perpendicular to the direction of actuation of the levers.
Claims8
A linear motor driving device, comprising:
- a first actuator;
- a second actuator coupled to said first actuator;
- each of said actuators comprising:
- (a) a C-shaped support element having first, second and third legs;
- (b) a first lever hingedly attached to said first leg;
- (c) a second lever hingedly attached to said second leg;
- (d) first piezoelectric element means coupled at a first end to said third leg, said third leg bridging said first and second legs;
- and
- (e) magnifying means arranged between a second end of said first piezoelectric element means and said first and second levers for enlarging the displacement of said first piezoelectric element means and for actuating said first and second levers;
- and
- second piezoelectric element means connected between the support elements of said first and second actuators and parallel to said first piezoelectric element means, for moving said first and second actuators apart from each other in a direction substantially perpendicular to the direction of lever movement when said first and second levers are actuated;
- and wherein said first and second piezoelectric element means are disposed in parallel with said first and second legs of said support elements, said first piezoelectric elements means and said second piezoelectric element means being at least partially longitudinally overlapping along the lengths thereof, and wherein said third legs of said support elements confront one another, spaced apart by said second piezoelectric element means.
9 more elements
A linear motor driving device, comprising;
- a first actuator;
- a second actuator coupled to said first actuator;
- each of said actuators comprising:
- (a) a C-shaped support element having first, second and third legs;
- (b) a first lever hingedly attached to said first leg;
- (c) a second lever hingedly attached to said second leg;
- (d) first piezoelectric element means coupled at a first end to said third leg, said third leg bridging said first and second legs;
- and
- (e) magnifying means arranged between a second end of said first piezoelectric element means and said first and second levers for enlarging the displacement of said first piezoelectric element means and for actuating said first and second levers;
- and
- second piezoelectric element means connected between the support elements of said first and second actuators and parallel to said first piezoelectric element means, for moving said first and second actuators apart from each other in a direction substantially perpendicular to the direction of lever movement when said first and second levers are actuated;
- and further including projections provided on said first and second members of said support element, and wherein said second piezoelectric element means comprises a pair of second piezoelectric elements respectively provided between the projections provided on said first legs of said respective actuators, and between the projections provided on said second legs of said respective actuators.
9 more elements
Dependencies are inferred from the claim text.