Patent ID: 7228758

Claim:
A pedal reaction force device for applying a prescribed reaction force to an operating pedal to be depressed by pedaling, comprising: a reaction force generating unit for applying a pedaling reaction force to said operating pedal on the basis of displacement due to said operating pedal being mechanically displaced in accordance with a pedaling operation; a displacement characteristics regulating mechanism disposed between said reaction force generating unit and said operating pedal, which transmits said reaction force to said operating pedal, and simultaneously mechanically non-linearly sets a variation pattern of displacement magnitude of said reaction force generating unit with respect to a pedaling stroke of said operating pedal; said reaction force generating unit comprising: (i) a damper device for applying the pedaling reaction force to said operating pedal on the basis of circulation resistance of a fluid sealed in said damper device by being mechanically compressed or tensioned in accordance with the pedaling operation of the operating pedal; (ii) a spring member for applying the pedaling reaction force to said operating pedal on the basis of resilient deformation by being mechanically and resiliently deformed in accordance with the pedaling operation of said operating pedal, the pedaling reaction force of the damper device differing according to the pedaling; and the spring member being a coil spring substantially concentrically disposed radially outward of the damper device so as to surround the damper device and being compressed and tensioned integral with the damper device in accordance with the pedaling operation of the operating pedal.