Switch mat
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United States of America Patent
Stats
-
Feb 23, 1999
Grant Date -
N/A
app pub date -
Mar 5, 1997
filing date -
Mar 7, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
This invention relates to a switch mat with key switches. In previously disclosed switch mats, switch chambers located under dome-shaped key caps were jointly vented. This affected key operation, and allowed soiling by dust and moisture. Here, each switch chamber has a ventilating channel with a filter layer that is permeable to air, for venting to and from the outside. In this design, the filter layer is formed by a filter matting that is dust and moisture-repellent. Because each switch chamber is separately vented to and from the outside, there is no mutual influence on operating forces of the key switches.
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International Classification(s)
Cited Art Landscape
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