초록 ▼

An air bag for side collision is arranged substantially in the vertical direction between a vehicular inner wall and a passenger in an expanded state of the air bag. A lower side of the air bag is folded to be incorporated into the lower side in the expanded state. The lower side of the air bag in t

An air bag for side collision is arranged substantially in the vertical direction between a vehicular inner wall and a passenger in an expanded state of the air bag. A lower side of the air bag is folded to be incorporated into the lower side in the expanded state. The lower side of the air bag in the expanded state is the upstream side of flow of expansion gas. The air bag has a narrowed gas flow port for regulating the flow of the expansion gas between the lower side and the upper side of the air bag in the expanded state so that the lower side can ensure sufficient inner pressure even when the passenger interferes with expansion of the lower side of the air bag during expansion, since the flow of the expansion gas is regulated by the gas communication port provided between the lower side and the upper side of the air bag. As a result, an inflator having small output can be used.

대표청구항 ▼

[ What is claimed is:] [1.] An air bag for side collision being arranged substantially in a vertical direction between a vehicular inner wall and a passenger in an expanded state of said air bag, a lower side of which in said expanded state constitutes an upstream side of a flow of an expansion gas

[ What is claimed is:] [1.] An air bag for side collision being arranged substantially in a vertical direction between a vehicular inner wall and a passenger in an expanded state of said air bag, a lower side of which in said expanded state constitutes an upstream side of a flow of an expansion gas and which can be folded into said lower side, said air bag comprising:a narrowed gas flow port for restricting flow of the expansion gas between said lower side and an upper side of said air bag in the expanded state;a lower chamber on said lower side of said air bag in said expanded state.an upper chamber said the upper side of said air bag in said expanded state, wherein said lower chamber and said upper chamber are partitioned by a weir in which said gas flow port is arranged on a side of a front portion of a vehicle; andan emergency communication port in said weir on a side of a rear portion of the vehicle, wherein said emergency communication port opens to connect said lower chamber with said upper chamber only when an inner pressure of said lower chamber increases to a level higher than a normal inner pressure value.