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Patent Searching and Data


Title:
DISPLACEMENT ELEMENT AND RELAY DEVICE USING IT
Document Type and Number:
Japanese Patent JPH0311516
Kind Code:
A
Abstract:

PURPOSE: To offer a displacement element of a little power consumption, little heat radiation and capable of holding its displaced state without using a holding device, and a relay device using it by utilizing a ferroelectrics shape-memory ceramic element which is digitally displaced by a phase change from antiferroelectric to ferroelectric phase induced by application of a predetermined electric field and which maintains its ferroelectric phase even after the electric field is cut off.

CONSTITUTION: Shape-memory ceramic elements 1, 2 are formed and silver electrodes 3, 4, 5 are combined to each of the elements, and the two shape-memory ceramic elements are stuck to each other and are held by a holding member 6 whereby a displacement element 10 is manufactured. A voltage of about 500V is applied to only the shape-memory ceramic element 1 via electrodes 4, 5. The shape-memory ceramic element 1 is then digitally displaced in the X direction by a phase change from antiferroelectric to ferroelectric phase. Thereafter, even when the applied voltage is 0, the shape-memory ceramic element 1 will not return to its initial state but maintains its ferroelectric phase and holds its displaced state, and exhibits its shape memory property. In order to convert the shape-memory ceramic element to its initial state, a reverse voltage of about 100V must be applied.


Inventors:
UCHINO KENJI
YODA SEI
Application Number:
JP14522389A
Publication Date:
January 18, 1991
Filing Date:
June 09, 1989
Export Citation:
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Assignee:
JUKI KK
International Classes:
H01H61/00; H01H57/00; H01H61/01; H01H61/02; (IPC1-7): H01H57/00; H01H61/00
Attorney, Agent or Firm:
Kato Taku