| 摘要 |
PURPOSE:To obtain the keyboard device which gives a player an excellent key touch feeling and is improved in playing performance by positioning the center of the arcuate slide contact surfaces of both rotary fulcrum parts behind a key rear end part. CONSTITUTION:A key support member 1 is provided with a 1st rotary fulcrum part 27 which is sectioned in an arcuate shape, a 2nd rotary fulcrum part 23 in an arcuate section shape which abuts on the 1st rotary fulcrum part 27 slidably is provided at the rear end part of a key 21, and the center O of the arcuate slide contact surfaces of both the rotary fulcrum parts 27 and 23 is positioned sufficiently behind the key rear end part. Therefore, even when the key itself is short, the center of the arcuate slide contact surface constitutes the rotary fulcrum part of the key 21 substantially. Consequently, a touch feeling similar to that when a long key is operated is obtained and the tilt angle of the key 21 is small, so the playing performance is improved and the appearance becomes excellent although the key is short. |
