Airbag device for use in a vehicle

An airbag device for a vehicle, wherein an airbag case accommodates an airbag element in its folded form which is placed at least in one of the portions of a front section covered by a interior cover of the vehicle, a central section of a steering wheel and both side columns, and which is inflated by a flow of gas from an inflator, and wherein an airbag case having an opening facing the back side of the interior cover is disposed;

• comprising a fracture-opening section formed fragile sections by fracture grooves made in the back side position of the cover opposite the opening of the airbag case, and a reinforcement plate having a shape corresponding to said fracture-opening section characterized that;
• the airbag device of the vehicle comprising;
• a reinforcement rib rectangular protrudently provided in the horizontal cross-section extending downwards the back side of the fracture-opening section of the interior cover;
• mounting holes disposed at the predetermined intervals respectively in the front and rear side walls (the longer direction) of the reinforcement ribs;
• hooks firmly mounted to the front and rear side edges (the lengthwise direction) of the airbag case to said mounting holes via a mounting section extending downward from a hinge of said the reinforcement ribs;
• front and rear side walls of the reinforcement ribs spaced respectively, from each of the front and rear side edges of the airbag case at the predetermined intervals to form spaced portions on both sides;
• and,
• fracture grooves of the fracture-opening section formed at said spaced portions.