| 摘要 |
In order to simplify the complex setting of the expansion pressure of an inflator and easily control the expanded direction of an air bag, the air bag is contained in an instrument panel such that the air bag faces an expansion opening formed in an upper surface of the instrument panel and, when a pressure fluid discharged from the inflator is fed into the air bag through an inlet of the air bag and thereby the air bag is inflated and expanded, a front bag part for a front side of a vehicle and a rear bag part for a rear side of the vehicle are inflated and expanded forward and rearward in a vehicle longitudinal direction with the inlet therebetween, respectively. The air bag has a seam, formed in the front bag part, for temporarily delaying delivery of the pressure fluid into the front bag part during initial inflation of the air bag. Thereby, the front bag part is inflated and expanded later than the rear bag part.
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