| 摘要 |
The air bag includes a bag body, a mouth portion for introducing gas supplied from an inflator into the bag body, and a fixture portion for fixing the air bag to a case. The mouth portion is disposed in a central portion of the case. A vehicle front side portion of the bag body located on the front side of the vehicle relative to the mouth portion and a vehicle rear side portion of the bag body located on the rear side of the vehicle relative to the mouth portion are folded to be accommodated between the mouth portion and front and rear inner faces of the case respectively. Upon activation of the inflator, a passenger facing portion of the bag body that faces the passenger in an ultimate deployment state of the air bag is first deployed to a predetermined extent. Thereafter, due to application of tension forces acting in such a direction as to deploy the air bag, the other portions of the bag body that are in their folded states are deployed toward the vehicle front and rear sides respectively.
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