| 摘要 |
PURPOSE:To improve the operability of performance and the expressing power of the performance by providing a pressure sensing means for detecting the pressure acting in the direction perpendicular to the guide surface of a key board and controlling various music sounds by rolling the key during the course of a key touch stroke at the time of a key touch. CONSTITUTION:The key guide 5 consists of an outsert molding 13 having the front end of a key frame or other member as a core material 12, pressure sensitive rubber 14 provided on both surfaces thereof and a surface film 15. The flanks on both sides of the molding 13 are provided with a pair of electrodes 11. The resistance of the pressure sensitive rubber 14 decreases in correspondence to the pressing force and the electrodes 11 conduct to each other when the pressure sensitive rubber is pressed. As a result, the pressure applied on the pressure sensitive rubber 14 is detected. Detection signals are obtd. from the left and right pressures when the key is vibrated in a transverse direction at this time. The size of the pitch of the signal output is freely regulated by the finger operation; for example, the free control of the speed change of vibrato or a change in depth is possible during the course of the key touch. |
