Vibration motor having improved adhesive layer between electrome

Details Vibration motor having improved adhesive layer between electrome Vibration motor having improved adhesive layer between electrome

1996-03-13

1997-08-05

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310346, H01L 4108

Patent

active

056546041

ABSTRACT:
An ultrasonic motor having an electromechanical element and an elastic body joined by an adhesive layer, wherein the adhesive layer is chosen for having either a specific thermal expansion coefficient, a specific shrinkage volume, a high Vickers hardness, a high longitudinal elastic modulus, or a high Vickers hardness and a high longitudinal elastic modulus. By proper selection of an adhesive for use in the adhesive layer, the motor drive efficiency, starting torque and power consumption can be improved by reducing the deformation of the elastic body and maintaining a larger contact area with a contact member or movable element. Proper selection of an adhesive also allows the motor's performance level to be maintained when the temperature changes.

REFERENCES:
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patent: 5066884 (1991-11-01), Takagi et al.
patent: 5099166 (1992-03-01), Hirano et al.
patent: 5134334 (1992-07-01), Ohnishi et al.

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