| 摘要 |
An air bag device mounted on a steering wheel (3) comprises a holding unit (9) connected to a boss portion (4) of the steering wheel. An inflater (8) is held by the holding unit. The inflater includes a gas ejection portion (8c). First and second fabrics (21,22) have peripheral portions sewed together to constitute a bag structure. A gas inlet opening (28) is formed in the first fabric. The gas inlet opening has the gas ejection portion of the inflater passed therethrough, so that the gas inlet opening is exposed to the interior of the bag structure. A third fabric (23) is smaller in size than the first and second fabrics. The third fabric is installed in the bag structure in a manner to cover over the gas ejection portion of the inflater. A plurality of sewed points (S-1,S-2,S-3,S-4) are provided by which the first and third fabrics are sewed together. A plurality of gas flow passages (P-1,P-2,P-3,P-4) are provided between the first and third fabrics. Each gas flow passage is defined between neighboring two of the sewed points. A vent opening (35) extends through one of the sewed points to provide a communication between a major portion of the interior of the bag structure and the outside of the same. <IMAGE> |
