Vehicle side airbag device and vehicle seat

摘要

In a vehicle side airbag device, when inflator operates, gas is supplied to left and right chambers of rear bag portion, and gas is supplied from communication opening through between a left and right side partitioning portions directly into a front bag portion. When inflation and expansion of the chambers are completed, the left and ride side partitioning portions are pushed against one another by internal pressures of the chambers, and the communication opening is closed-off. A valley, that is recessed toward a vehicle rear side, is formed at a front surface of the rear bag portion. At a time when the rear bag portion interferes with a vehicle occupant who is at an improper position, this valley is expanded due to the left and right chambers moving apart from one another in a vehicle left-right direction.

主权项

1. A vehicle side airbag device comprising:
a bag body that is formed in a shape of a bag, that, in a folded-up state, is accommodated within a side support portion of a seat back of a vehicle seat, and that inflates and expands toward a vehicle front side of the side support portion due to gas being supplied to an interior of the bag body; a tubular flow regulating portion that is provided at a rear end portion of the interior of the bag body; a front-rear partitioning portion that partitions the bag body into a front bag portion and a rear bag portion, and that partitions the rear bag portion into a left chamber and a right chamber, and that communicates the left and right chambers with an interior of the flow regulating portion, the front-rear partitioning portion including a left side partitioning portion and a right side partitioning portion that extend from the flow regulating portion, a front end edge portion of the left side partitioning portion being sewn to a front-rear direction intermediate portion of a left side portion of the bag body, and a front end edge portion of the right side partitioning portion being sewn to a front-rear direction intermediate portion of a right side portion of the bag body; an inflator that is provided within the flow regulating portion, and that generates the gas that is supplied to the interior of the bag body; and a communication opening that is provided at a vertical direction intermediate portion of the flow regulating portion, that passes-through between the left side partitioning portion and the right side partitioning portion, and that communicates the interior of the flow regulating portion and an interior of the front bag portion.