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Title:
DOME-LIKE METAL SPRING AND SWITCH SHEET
Document Type and Number:
Japanese Patent JP2004165020
Kind Code:
A
Abstract:

To obtain equipment which can endure clicks, for example, for more than 1 million times even though it is downsized, by providing a dome-like metal spring with less distortion due to clicks, and which is excellent in the durability by providing a switch sheet using the metal spring.

The dome-like metal spring is made of a metallic thin plate, of which the central portion is formed as a dome-like portion, and is provided with at least one pair of opposite protrusions protruded horizontally or a little upward at a bottom outer periphery of the dome-like portion. The protrusions are to be dome-like metal springs having sizes with protruded lengths of ≤200 μm and widths of 0.3 to 1.0 mm.


Inventors:
TOMIZUKA TOSHIMIZU
MIMURA SHOJI
Application Number:
JP2002329916A
Publication Date:
June 10, 2004
Filing Date:
November 13, 2002
Export Citation:
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Assignee:
FUJIKURA LTD
International Classes:
H01H13/48; H01H5/30; H01H13/70; H01H13/702; (IPC1-7): H01H13/48; H01H5/30; H01H13/70
Domestic Patent References:
JPH11306910A1999-11-05
JPH10188728A1998-07-21
JPH0171836U1989-05-15
JPH01119131U1989-08-11
Attorney, Agent or Firm:
Takeo Masuda