| 主权项 |
1. A side airbag apparatus comprising:
an airbag main body, which is deployed and inflated beside an occupant seated in a vehicle seat to restrain the occupant; an inflator, which supplies inflation gas to the airbag main body in response to an impact applied to the vehicle seat from a side; and a lateral partition, which is provided in the airbag main body in a bridging manner to divide at least a part of an interior of the airbag main body into an upper inflation chamber above the lateral partition and a lower inflation chamber below the lateral partition, wherein the upper inflation chamber includes a first section, and the lower inflation chamber includes a second section, a sheet-like upper restricting portion is provided in a bridging manner in the first section of the upper inflation chamber, wherein the upper restricting portion restricts an inflated dimension of the upper inflation chamber, the upper inflation chamber is located above the second section of the lower inflation chamber, and the lower inflation chamber is inflated with an internal pressure higher than that of the upper inflation chamber, the upper restricting portion has a front-rear length that is shorter than a circumferential length in a front-rear direction of the first section of the upper inflation chamber and is tensioned in the front-rear direction as the upper inflation chamber is inflated, and the upper restricting portion is configured to restrict an inflated dimension of the upper inflation chamber in the front-rear direction such that, when inflation of the airbag main body is completed, an inflated dimension of the first section of the upper inflation chamber in a widthwise direction of the vehicle seat is greater than an inflated dimension of the lower inflation chamber in the widthwise direction of the vehicle seat. |
