Side airbag device for an automobile

摘要

Lifting up of a side airbag toward a vehicle upper side when there is a side collision is suppressed or prevented. In a side airbag, a tether is provided that divides the side airbag into a lower chamber and an upper chamber. The tether is attached in an attitude that, viewed from a vehicle forward side, is inclined such that a vehicle width direction inner side thereof is higher than the vehicle width direction outer side. A gas jetting aperture is formed at a lower end portion of a diffuser of a gas jetting unit. The gas jetting aperture is disposed in the lower chamber and is oriented toward a lower face of the tether. Therefore, during a process of expansion of the side airbag, gas strikes the lower face of the tether, then strikes portions that have not yet unfolded, and flows downward.

主权项

1. A side airbag device for an automobile, comprising:
a side airbag stowed in a folded state, including:
an occupant side base cloth portion disposed at an occupant side; anda vehicle body side base cloth portion disposed at a vehicle body side portion side, a tether that is disposed inside the side airbag, and of which a height of an attachment portion thereof to the vehicle body side base cloth portion is different from a height of an attachment portion thereof to the occupant side base cloth portion, the tether dividing a cavity inside the side airbag into a lower chamber and an upper chamber, and the upper chamber being in fluid communication with the lower chamber via a communication portion; and a gas jetting unit including:
an inflator that, when operated, produces gas and jets out the gas through a plurality of gas jetting holes formed in a lower end portion thereof;a gas jetting aperture which is disposed in the lower chamber and is configured to jet the gas out toward a lower face of the tether when operated, such that a direction of flow of the gas is diverted toward a vehicle lower side while the lower chamber is being inflated, the gas jetting aperture being oriented toward the lower face of the tether; anda diffuser that (i) is formed in a tube shape of which one end is closed off, (ii) aperture is provided.