| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To change a percussion timbre with simple constitution by selecting a percussion in the absence of an interposing displacement member or a percussion in the presence of the interposing displacement member in response to operation. <P>SOLUTION: On a support plate 77 between left and right arms 76, a base part 78a of the interposing member 78 is fixed, and a swing part 78b is formed in front of the base part 78a. When an operation lever 72 is operated forward or backward, the arms 76 rotate on a rotation shaft 79 forward or backward and then the swing part 78b is displaced forward or backward. When the arms 76 are disposed at rearmost ends, the swing part 78b does not interpose between a percussion part 24 and a soundboard 30 and the percussion part 24 directly hits the soundboard 30. When the arms 76 are disposed at foremost positions, the swing part 78b interposes between the percussion part 24 and soundboard 30 and keying operation causes the percussion part 24 hit the soundboard 30 indirectly through the swing part 78b. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
