Title:
【発明の名称】圧電アクチュエータ
Document Type and Number:
Japanese Patent JP2918727
Kind Code:
B2
Abstract:
PURPOSE:To prevent a bending moment, etc., within a drive from occurring by forming a preload spring in a squarecylindrical shape and then joining it to upper and lower edge portions of a pilot pressure block. CONSTITUTION:A cylindrical preload spring 4 is a square-cylindrical member and is formed by a thin-plate SK material, etc. The inner-periphery shape is formed to be nearly equal to an outer-periphery shape of a pilot pressure block 3 in planrectangular shape which is placed at upper and lower edge parts of a lamination piezoelectric body 2. While the lamination piezoelectric body 2 is covered with the cylindrical preload spring 4, the upper and lower edges are subjected to laser spot welding to a side wall of the pilot pressure block 3 for fixing thus enabling a compression force which is applied to a side of the lamination piezoelectric body to be equal and preventing a bending moment, etc., within drive from being generated.
Inventors:
KIMURA TASUKE
OSHIME JUJI
OSHIME JUJI
Application Number:
JP30303191A
Publication Date:
July 12, 1999
Filing Date:
November 19, 1991
Export Citation:
Assignee:
FUJITSU KK
International Classes:
B41J2/295; H01L41/083; H01L41/09; (IPC1-7): H01L41/083
Domestic Patent References:
| JP2288380A | ||||
| JP3240280A | ||||
| JP192155U | ||||
| JP6151766U |
Attorney, Agent or Firm:
Masao Yamakawa