Patent ID: 8158876
Filing Date: 2012-04-17
Classification: G10H

Abstract:
1. A keyboard apparatus comprising: a frame having a key support and hammer supports and integrally formed by resin, said frame being adapted to be supported on a musical instrument main body; a plurality of keys mutually juxtaposed and each supported by a corresponding one of the key supports for pivotal motion when depressed; a plurality of hammers mutually juxtaposed so as to correspond to respective ones of said keys, each of said hammers being supported by a corresponding one of the hammer supports at a location below the corresponding key so as to pivot about the hammer support in conjunction with the corresponding key and impart inertia to a pivotal motion of the key; an initial stopper having a lower surface and provided on said frame integrally therewith or separately therefrom; and an initial stopper mounting portion integrally formed on said frame and mounted with said initial stopper, wherein said hammers are adapted to be in contact with the lower surface of said initial stopper in a non-key-depression state, whereby initial pivot positions of said hammers in a key-depression forward stroke are restricted to thereby restrict key-depression initial positions of said keys, wherein said hammers each have a stopper contacting portion adapted to be in contact with the lower surface of said initial stopper in the non-key-depression state, and a distance from the stopper contacting portion of each of said hammers to a corresponding one of the hammer supports is shorter than a distance from the hammer support to a center of gravity of the hammer.