| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a keyboard in which attachment of weights is simple while using a material alternative to lead as the material of the weights and also the touch weight can be easily adjusted. <P>SOLUTION: The keyboard includes; a freely rockable keyboard body 2 in which embedding holes 9 are provided; and weights 4 which are fitted into the embedding holes 9 of the keyboard main body 2 freely attachably and detachably and impart weight to the keyboard main body 2, and the weight 4 includes a composite material 12 in which plurality of kinds of materials other than the lead, containing powdery tungsten and plastic, are blended with one another with a prescribed blending ratio so that the composite material has prescribed specific gravity. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
