| 摘要 |
PURPOSE:To provide a keyboard switch of an electronic musical instrument capable of extremely stabilizing a switching action even if parts are not added at all. CONSTITUTION:This keyboard switch 4 of the electronic musical instrument has a circuit board 15 which is formed with first and second stationary contacts Cs1, Cs2, an elastic switch body 16 which is mounted on this circuit board 15 and first and second moving contacts Cm1, Cm2 which are disposed in juxtaposition with this switch body 16. The keyboard switch described above detects the key touch information of the keyboard by bunging the first and second moving contacts Cm1, Cm2 into successive contact with the first and second fixed contacts Cs1, CS2 by pressing of the keyboard or hammer turned at the time of the key touch. The spacing between the first moving contact and stationary contact Cm1 and Cs1 is set shorten than the spacing between the second moving contact and stationary contact Cm2 and Cs2. The switch body 16 is so constituted as to be turned around the first moving contact Cm1 after contact of the first moving contact Cm1. |
