Key structure
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United States of America Patent
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Jul 1, 2008
Grant Date -
Nov 16, 2006
app pub date -
Mar 20, 2006
filing date -
Mar 23, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A key structure includes a top plate which is formed by laminating a half-transparent resin surface layer member on a resin bottom side member using two-color injection molding, and the top plate is secured on a wooden key base. A plurality of concave grooves and protrusions, and a plurality of protrusion and troughs are respectively formed together in straight lines in the long direction of the key structure on a rear face of the surface layer member and a top face of the rear side member. Outside light is reflected from the top ends of the protrusion and the troughs, whereby a faint and natural vertically-striped pattern, which corresponds to a concave-convex part formed by the concave grooves and the protrusions, is perceived as resembling an edge grain of ivory.
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