Title:
DOME TYPE METAL SPRING
Document Type and Number:
Japanese Patent JP2003123586
Kind Code:
A
Abstract:
To provide a dome type metal spring and a switch using it with superior durability against increase in the number keying times of a switch for enduring remarkably increased switch operations in a mobile telephone or the like.
A dome type metal spring can be provided not breaking even by keying of three million times and having a small P1 reduction rate since it is formed by stainless steel with hardness Hv of 500-650. A switch with superior durability and an electronic apparatus enduring prolonged usage can be provided since the switch is composed of the dome type metal spring, a stationary contact and a lead circuit.
Inventors:
TOMIZUKA TOSHIMIZU
MIMURA SHOJI
KAWAHIRA TETSUYA
MIMURA SHOJI
KAWAHIRA TETSUYA
Application Number:
JP2001310599A
Publication Date:
April 25, 2003
Filing Date:
October 05, 2001
Export Citation:
Assignee:
FUJIKURA LTD
International Classes:
F16F1/18; H01H1/02; H01H5/30; H01H13/48; (IPC1-7): H01H13/48; F16F1/18; H01H1/02; H01H5/30
Attorney, Agent or Firm:
Masatake Shiga (3 outside)