| 摘要 |
PURPOSE:To obtain a sufficient stroke without increasing the front-rear directional length of a key by elevating the fulcrum of the key with the energizing force of an energizing means as pressing force applied to the key decreases and returning it to its initial position. CONSTITUTION:When a front-rear directional nearly intermediate part of the key 4 is pressed with a finger under pressure in a normal musical performance, the key 4 turns around a 1st fulcrum part A against the spring forces of 1st and 2nd springs 6 and 7. Then pressure projections 24 and 25 of the key 4 are pressed against pressed parts 21a and 22a of 1st and 2nd sensors 21 and 22 to deform the parts and the pressing projection 29 of a connecting rod 5 is pressed against a pressure sensitive sensor 28 to deform the sensor; and the output signals of the 1st and 2nd sensors 21 and 22 and the pressure senitive sensor 28 are analyzed and used for musical sound control, and a controlled sound is generated. Further, when they are released from being pressed, the key 4 returns to its initial position with the spring forces of the 1st and 2nd springs 6 and 7 and both the sensors 21 and 22, the pressure sensitive sensor 28, etc., are restored to their undeformed states. |
