AIR BAG DEVICE FOR VEHICLE

摘要

PROBLEM TO BE SOLVED: To positively and rapidly open an air bag door by rupturing a panel of a door part smoothly and instantaneously along a door line in the seamless type air bag door. SOLUTION: The back face of a core material 17 of the air bag door 21 is provided with a tear line recessed in approximately U-shape to rupture the core material 17, comprising a first tear line 31 and a pair of second tear lines. The thickness t1 of the core material 17 at the approximately center part and both end parts of the first tear line 31 is made thinner than the thickness of the core material 17 at the other part of the first tear line 31 and both second tear lines. The surface of the core material 17 of the air bag door 21 is provided with a projecting part erected to rupture a skin material 4, comprising a first projecting part 39 and a pair of second projecting parts. The projecting quantity h1 of the approximately center part and both end parts of the first projecting part 39 is made larger than the projecting quantity of the other part of the first projecting part 39 and both second projecting parts.