| 摘要 |
A key drive device (10; 10A; 10B) to be installed on a musical instrument (1) with a keyboard (2) partly located above a leg block (4) via a key bed (3). In a state in which the drive units (10-L, 10-U; 10A-L, 10A-U; 10B-L, 10B-U) are installed, at least one drive unit which drives at least one key located above the leg block includes: (a) a first portion (100b; 100Ab; 100Bb) at least a part of which is inserted into an insertion space portion (30b) of the removal space between the leg block and the keyboard; and (b) a second portion (100a, 200a; 100Aa, 200Aa; 100Ba, 200Ba) at least a part of which is disposed in other space portion(30a) of the removal space, a dimension of the second portion in at least one of a vertical direction and a horizontal short-side direction being larger than that of the first portion. |
