| 摘要 |
<p>PROBLEM TO BE SOLVED: To eliminate the need for such processing that another member such as keyboard lead is buried to weight a keyboard plate of a keyboard for a musical instrument and to weight the keyboard plate while maintaining the strength without forming any brittle part by coupling a heterogeneous material. SOLUTION: The keyboard for the musical instrument has the main body of the keyboard plate constituted by stacking a plurality of plate materials, and the keyboard plate 1 is constituted by using as a center core a weighting material 1b having higher specific gravity than the plate materials 1a, etc., forming the main body.</p> |
