| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a keyboard which facilitates the mounting of weights and can easily regulate touch weight while using substitutive materials in place of lead as the materials of the weights. SOLUTION: This keyboard has a freely oscillatable keyboard body 2 with formed embedment holes 9 and the weights 4 which are freely attachably and detachably fitted into the embedment holes 9 of this keyboard body 2 and impart the weight to the keyboard body 2. The weights 4 have weight mounting member 11 which are composed of the elastic materials and have insertion holes 11a and weight bodies 12 which are composed of the composite materials formed by blending plural kinds of the materials exclusive of the lead at prescribed compounding ratios so as to have prescribed specific gravity and are freely attachably and detachably fitted into the insertion holes 11a of the weights mounting members 11.</p> |
