MEMBRANE SWITCH AND PRODUCTION METHOD THEREOF - SUMITOMO ELECTRIC INDUSTRIES

Title:

MEMBRANE SWITCH AND PRODUCTION METHOD THEREOF

Document Type and Number:

WIPO Patent Application WO/2000/002217

Kind Code:

A1

Abstract:

(1) A membrane switch comprising paired plates and a spacer separating the plates from each other, wherein an operating force of the switch is 0.03 to 0.2 kg when the switch is pressed by a round bar having a hemispherical tip end with a radius of curvature of 5 mm. A production method, wherein (2) the spacer is in a film form and has through holes having a rate of hole area of not smaller than 50 % and (3) the thickness of the spacer and the size of the through holes in the spacer are set to preset values so as to provide an operating force of 0.03 to 0.2 kg, (4) the thickness of the spacer being 20 to 150 $g(m)m, one of the sizes of through holes being 2 to 10 mm square and (5) a spacer having an insulating film of a specified thickness in which specified through holes are drilled, thereby providing a membrane switch free from erroneous operation, small in operating force change and excellent in durability.

Inventors:

YAMAZAKI SEKIYA (JP)
YOSHIDA NORIYUKI (JP)
UEMIYA TAKAFUMI (JP)
FUKUDA YUTAKA (JP)
OSOEGAWA MISAKO (JP)

Application Number:

PCT/JP1999/002132

Publication Date:

January 13, 2000

Filing Date:

April 21, 1999

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)
YAMAZAKI SEKIYA (JP)
YOSHIDA NORIYUKI (JP)
UEMIYA TAKAFUMI (JP)
FUKUDA YUTAKA (JP)
OSOEGAWA MISAKO (JP)

International Classes:

H01H13/712; H01H3/14; H01H11/00; (IPC1-7): H01H13/70

Foreign References:

JPH0660765A	1994-03-04
US3911215A	1975-10-07
JPH04280013A	1992-10-06
JPS6076433U	1985-05-28

Other References: