| 摘要 |
PURPOSE:To obtain high power of expression by detecting a touch of keying with high sensitivity through simple constitution and performing musical sound control. CONSTITUTION:The key switch of a rubber contact member 30 is turned ON by keying, a stopper piece 1c leaves an upper-limit stopper 6B to remove the upward energizing force of a key return spring 3 which operates on a flexible member 34, and the gravitational downward force operates, thereby forming a 1st struggle part d1. At a 2nd struggle part d2 from the abutting of the stopper piece 1c on an intermediate stopper 6A to the abutting on a lower-limit stopper part 22d, the flexible member 34 further curves downward and the photosensor 38e of a rubber sensor member 38 detects that to control a musical sound. |
