| US 7,514,613 B2 | ||
| Keyboard device for keyboard instrument | ||
| Tsutomu Yamaguchi, Shizuoka-ken (Japan) | ||
| Assigned to Kabushiki Kaisha Kawai Gakki Seisakusho, Shizuoka-ken (Japan) | ||
| Filed on Jul. 21, 2005, as Appl. No. 11/185,857. | ||
| Claims priority of application No. 2004-219821 (JP), filed on Jul. 28, 2004. | ||
| Prior Publication US 2006/0021490 A1, Feb. 02, 2006 | ||
| Int. Cl. G10C 3/18 (2006.01) | ||
| U.S. Cl. 84—236 [84/433] | 13 Claims |
| 1. A keyboard device for a keyboard instrument, comprising:
a keyframe formed by a molded piece of a synthetic resin;
said keyframe formed as a single molded member, wherein the single molded member includes a flat plate-like planar keyframe
body, a keyframe center upwardly projecting from a central part of said keyframe body in a front-rear direction and extending
in a left-right direction, and a keyframe front on a front part of said keyframe body and extending in the left-right direction,
wherein said keyframe body, said keyframe center, and said keyframe front are co-planar;
a plurality of front rail pins arranged on said keyframe front in a juxtaposed manner in the left-right direction;
a plurality of balance rail pins arranged on said keyframe center in a juxtaposed manner in the left-right direction;
a plurality of keys made of wood and each having a balance rail pin hole formed in a central portion thereof in the front-rear
direction; and
a first reinforcing member made of metal and provided in a vicinity of the balance rail pins for reinforcement of rigidity
of the keyframe,
wherein said keys are swingably supported on said keyframe center in a state where said balance rail pins are each engaged
with the balance rail pin hole associated therewith and at the same time said keys are prevented from being swung in the left-right
direction by said front rail pins associated therewith.
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