| 摘要 |
PURPOSE:To obtain a key touch feeling which is closed to the key touch feeling of an acoustic piano and to enable excellent performance such as staccato and legato by giving a reaction force to a key by a rotary body and a damping member. CONSTITUTION:When the key 5 is pressed, felt 28 on the reverse surface of the key 5 abuts on the operation abutting part 33 of the rotary body 22. The resistance force of the rotary body 22 which is energized anticlockwise by the weight of the key (not shown in figure) is given as a large action load to the key 5. The rotary body 22 rotates inertially, so the resistance force of the rotary body 22 comes not to operate on the key 5, thereby generating a head of the load (feeling of releasing). When the key 5 is further displaced downward, the curved surface 37 of a control member 25 abuts on the projection part 30 of a base member 21. The spring force of the damping coil spring 39 of the damping member 25 operates on the key 5 and the load on the key 5 increases gradually. Then the projection part 34 of the rotary body 34 intrudes into the cushion member 38 of the damping member 25 and the load on the key 5 further increases. |
