Throttle control apparatus

A throttle control apparatus comprising;

• an accelerator operation mechanism,
• a driving source generating driving force in response to at least an operational amount of the accelerator operation mechanism,
• a throttle shaft fixing a throttle valve of an internal combustion engine thereto and supported on a housing so as to be able to rotate and having at least an one end portion which extends from the housing,
• a supporting member fixed to an extending portion of the throttle shaft,
• a rotor supported at a prescribed place on the throttle shaft between the supporting member and the throttle valve so as to be able to rotate and so as not to be able to move in the direction of an axis of the throttle shaft and having outer teeth which are formed on the whole circumference of its own outer circumferential end portion and first nail portions which are formed on an its own flat portion adjacent to the outer teeth so as to radially extend and so as to be continuously arranged on the whole circumference and connected with the driving source so as to be rotated by the driving force of the driving source,
• a movable member made of a magnetic substance and supported on the throttle shaft so as to be movable in the direction of the axis of the throttle shaft between the rotor and the supporting member and having second nail portions which are formed on the whole circumference of an its own flat portion opposite to the rotor so as to locate opposite to the first nail portion and so as to have a substantially same shape as the first nail portions in order to constitute a dog clutch with the rotor,
• a connection member connecting the movable member with the supporting member and urging the movable member toward the supporting member and
• an electromagnetic coil fixed to an place of the housing opposite to the rotor and attracting the movable member under its own exciting condition so as to connect the movable member with the rotor.