Ashimori Industry Co., Ltd.

Mazda Motor Corporation

Kazuhiko Soemoto

Keisuke Moritani

Naoki Yamaji

Toshihiro Ishikawa

Tomoki Hashizume

Tadaaki Sekino

An airbag () has a vent hole () in one side end portion. One end of a third base fabric () is sewn to the airbag () through a first sewn portion () that closes the vent hole (), and the other end of the third base fabricis sewn to the other side end portion of the airbag () through a second sewn portion (). The first sewn portion () has weaker binding force by sewing than the second sewn portion () so that the first sewn portion () is separated to open the vent hole () when tension force is applied from the third base fabric () to the first and second sewn portions () and ().

Airbag device

Intended is to always provide effective impact reduction by releasing gas at a timing of pushing into airbag. An airbag () has a vent hole () in one side end portion. One end of a third base fabric () is sewn to the airbag () through a first sewn portion () that closes the vent hole (), and the other end of the third base fabricis sewn to the other side end portion of the airbag () through a second sewn portion (). The first sewn portion () has weaker binding force by sewing than the second sewn portion () so that the first sewn portion () is separated to open the vent hole () when tension force is applied from the third base fabric () to the first and second sewn portions () and ().

To enhance an occupant restraining force of an airbag, and to improve a protective function for an occupant of an airbag device by discharging gas without fail regardless of a position of the occupant, an airbag () is divided into a first chamber (A) on an inflator () side and a second chamber (B) on an occupant side by a partition wall (), and the first chamber (A) includes an opening () to which a discharge-state switching member () having vent holes to discharge the gas in the airbag () and being switchable between the discharge/non-discharge states is attached. The discharge-state switching member () is coupled to the partition wall () by a tether belt (), so that the tether belt () applies tension to close the vent holes when the airbag () inflates, and when the airbag () receives an occupant, releases the tension depending on the position of the receipt, and opens the vent holes.

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Settsu, Japan

Kazuhiko Soemoto