Patent ID: 7816913

Claim:
A rotation angle detecting unit that is configured to detect a rotation angle of an accelerator pedal, which is rotated by pedal force, the unit comprising: a pedal arm that is configured to be rotated by the pedal force, which is transmitted from the accelerator pedal; an urging means for urging the pedal arm in an opposite direction from a direction, in which the pedal force is applied to the pedal arm; a pedal rotor that is formed separately from the pedal arm and that engages the pedal arm to transmit urging force of the urging means to the pedal arm; a rotation angle detecting means for detecting the rotation angle of the accelerator pedal; and a shaft member, which is fixed to the pedal rotor to rotate integrally therewith and has a rotational axis that coincides with a rotational axis of the pedal rotor, wherein the rotation angle detecting means includes: a movable part that is attached to the shaft member and thereby displaced together with the shaft member and the pedal rotor; and a stator that is configured to output an electric signal, which is associated with a rotational position of the pedal rotor due to one of magnetic and electric interactions with the movable part.