Vibrator-type actuator

Details Vibrator-type actuator Vibrator-type actuator

1990-08-28

1992-06-09

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, 310366, H01L 4108

Patent

active

051210258

ABSTRACT:
A pair of electrodes are formed on both end surfaces of a pillar-shaped piezoelectric body polarized in a longitudinal axial direction thereof. A cover is formed on at least a part of a side surface of the piezoelectric body. The cover is made of material having high wear resistant and large heat conductivity characteristics. The electrode is formed on a part of the end surface. A moving element is pressed against the cover of the piezoelectric body. The cover is secured to supporting means at a portion of the side surface of the cover where a small vibration displacement is caused. Each of the paired electrodes are formed at essentially symmetrical portions with respect to a center point of the piezoelectric body or at asymmetrical portions with respect to a plane perpendicular to the longitudinal direction.

REFERENCES:
patent: 4999536 (1991-03-01), Toda
patent: 5008581 (1991-04-01), Kumada

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