Patent ID: 7390004

Claim:
A steering damper device in which a rotary damper includes a damper case, a rotary shaft rotatably supported on the damper case, and an actuation lever connected at a portion around one of opposite ends thereof to an end of the rotary shaft, and is configured so that the rotary shaft is rotated to generate a damping force in the damper case; the damper case is mounted to a steering member rotated around a steering stem by operation of a handlebar; and the other of the opposite ends of the actuation lever is connected, via a control lever, to a frame member that is not rotated by the operation of the handlebar, wherein one end of the control lever is rotatably connected to the frame member via a first pivot, the other end of the actuation lever is rotatably connected to the other end of the control lever via a second pivot, the first and second pivots are arranged so that a line connecting the centers of the first and second pivots is substantially intersected by an axis of the steering stem at a steering angle of 0°, and thus a rotation angle of the rotary shaft increases in the form of a quadratic curve with increase in the steering angle from 0°.