| 摘要 |
<P>PROBLEM TO BE SOLVED: To successfully obtain good pedal operation feelings similar to those of the pedal of an acoustic piano. <P>SOLUTION: A pedal device 1 is provided with a coil spring (first reactive force generation member) 40 for applying a first reactive force to a pedal 10 from the pressing start position of the pedal 10, and a leaf spring (second reactive force generation member) 60 for applying a second reactive force to the pedal 10 from a position pressed by a predetermined amount from the pressing start position of the pedal 10. The leaf spring 60 is disposed so as to be decomposable while using a generated reactive force as component force in horizontal and vertical directions, and the component force in the vertical direction becomes a second reactive force. The leaf spring 60 is changed in posture accompanying movement caused by the pressing of the pedal 10, and the active direction of a generated reactive force to the pedal 10 is changed. Thus, there is a pedal displacement area which is varied so that a reactive force combining first and second reactive fores increases accompanying increase in a pressing amount of the pedal 10, but its increase rate is gradually reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT |
