| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve performance by making key pressing feeling of a damper for a piano more natural. <P>SOLUTION: An arm for supporting a damper bar comprises a rotation arm 231 and a rotation arm fixture 232. A rotation support shaft 231c is provided to be allowed to project to the rotation arm 231. A countersink 232g is provided in the rotation arm fixture 232. A taper bush 30 with a shape matching with the countersink 232g is inserted into the countersink 232g. A cross section of the taper bush 30 in a diameter direction is a C letter shape with a cut in a part of a periphery. The rotation support shaft 231c is inserted into the taper bush 30 and the countersink 232g and connected with a nut 233. Thereby, there is no backlash of the rotation support shaft 231c between the rotation support shaft 231c and the rotation arm fixture 232. Consequently, as let-off dimension is reduced by arranging the damper bar near the string, key pressing feeling becomes more natural. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
