Starting key apparatus of vehicle

A starting key apparatus of a vehicle, comprising:

• a housing including a stopper protrusion at an inner wall of the housing;
• a starting key rotating part installed in an end of the housing and in which a starting key is inserted;
• an ignition switch installed at another end of the housing and configured to start an engine;
• and
• a connection shaft provided in the housing and configured to connect the starting key rotating part to the starting switch,
• wherein the connection shaft comprises:
• a shaft body rotated based on a shaft;
• a blocking lever installed in a cut groove of the shaft body to be rotated based on a hinge shaft;
• and
• a spring configured to connect the shaft body to the blocking lever to provide an elastic force to the blocking lever,
• wherein when a distance between the hinge shaft of the blocking lever and a mass center of the blocking lever is a first interval, and a distance between the hinge shaft of the blocking lever and the spring is a second interval,
• wherein the blocking lever protrudes by the spring to make contact with the stopped protrusion when multiplication of a centrifugal force exerting influence upon the blocking lever and the first interval is greater than multiplication of an elastic force of the spring and the second interval, and
• wherein a first point, a second point, a third point, and a fourth point are sequentially located in the housing,
• the first point corresponds to a LOCK point, the second point corresponds to an ACC point, the third point corresponds to an ON point, and the fourth point corresponds to a START point, and
• when the connection shaft is excessively rotated in a reverse direction from the fourth point and passes through the third point, the blocking lever is bounced from the cut groove to make contact with the stopper protrusion.