Title: Key structure
Application Number: 200610068114 Application Date: 2006.03.21
Publication Number: 1838225 Publication Date: 2006.09.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G10C3/12,G10B3/12
Applicant(s) Name: Yamaha Corp. Address:
Inventor(s) Name: Muramatsu Shigeru
Attorney & Agent: ge jing li xiaoshu
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.
Time: 9
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