Patent ID: 7070200

Claim:
An air bag case assembly comprising: an air bag case disposed on a hub centrally provided in a steering wheel, the air bag case being installed therein with an air bag, and an inflator that supplies expansion gas to the air bag; a rail mounted to the hub of the steering wheel, the rail having a first groove defined at the side of the air bag case, and a second groove defined at the side of the hub of the steering wheel, the first groove having a width narrower than a width of the second groove; and a track mounted to the air bag case, the track having a first portion located at the side of the air bag case, and a second portion located at the side of the hub of the steering wheel, the first portion having a width narrower than a width of the second portion, in correspondence to the grooves of the rail, so that the track is engaged into the grooves of the rail, thereby allowing the air bag case to be assembled to the hub of the steering wheel.