| 摘要 |
<p>PURPOSE:To eliminate the reswitching of a rubber switch and to generate no unnecessary musical sound by providing a damping member for bounce prevention which abuts on a hammer arm when the hammer arm rotates and returns to its initial position. CONSTITUTION:This electronic keyboard musical instrument is arranged by fitting another chassis support plate 3A nearby the tip part of the other arm part 22c of the hammer arm 21 with a screw 4A. On the top surface of the chassis support plate 3A nearby the top surface of a musical instrument main body case 1 facing the reverse surface of the tip part of the arm part 22c, the damping member 41 for bounce prevention is provided which is made of a material with a low elastic coefficient such as sponge and rubber. Therefore, even if the top surface of the tip part of the other arm part 22 of the arm 21 is bounced strongly by abutting on a stopper member 29 when the device is played staccato, the reverse surface of the tip part of the arm part 22 abuts on the damping member 41, which absorbs the bouncing energy to stop the arm 21 at its bottom dead center, i.e. the initial position shown by a solid line, so that the arm is never bounced up from the bottom dead center unnecessarily.</p> |
