| 摘要 |
PURPOSE:To obtain a desired touch feeling with simple constitution by arranging an arm which is coupled between a key and a support base and has one end engaged by rotation and the other end engaged by sliding and providing key return means between the arm and support base. CONSTITUTION:The arm 7 which has one end coupled rotatably and the other end coupled slidably is arranged between the key 1 and support base 11 and then the depressing operation of the key 1 is converted into the rotary motion of the arm 7. Then the key return means 9, 15, and 17 are provided between the arm 7 and support base 11 and when a restoring force is applied to the arm 7, the restoring force is transmitted from the arm 7 to the key 1. At this time, the motion of the arm 7 is interposed and then the restoring force can be set decreasing as the key 1 is depressed. Consequently, the relation between the arm 7 and key return means 9, 15, and 17 is adjusted to adjust the touch feeling of the key 1 to desired one. |
