| 摘要 |
<p>PURPOSE: To provide a key touch detector of a keyboard musical instrument which is mountable as it is even at keyboard musical instrument having a narrow spacing between a keyboard and a plate material such as a keyframe and is not deviated in the relative position with the keyboard with lapse of time. CONSTITUTION: This key touch detector 1 is composed of a supporting member 2, a sensor stay 3, a height adjusting screw 4 and a sensor 5 mounted at a printed circuit board 6. This supporting member 2 is fixed to the keyframe 8 by means of wood screws 13 for fixing and supports the sensor stay 3 integrated with the printed circuit board 6 soldered with the sensor 5 by means of height adjusting screws 4 and compression coil springs 41. These height adjusting screws 4 are screwed into height adjusting screw holes disposed at the sensor stay sensor 3 and, therefore, if the height adjusting screws 4 are turned, the sensor stay 3 integrated with the printed circuit board 6 moves vertically. At this time, the height adjusting screws 4 themselves merely rotate axially without vertically moving.</p> |
