Patent ID: 9085279
Filing Date: 2015-07-21
Classification: B60R

Abstract:
1. A side airbag device for a vehicle, the side airbag device comprising: an inflator that is provided at a side portion of a seat back, and jets-out gas at a time of a side collision; and a side airbag that is stored in a folded-up state at the side portion of the seat back, and at which are integrally provided a waist portion protecting bag portion that, due to gas being supplied from the inflator, is expanded between a waist portion of a seated passenger and a vehicle body side portion, and a chest portion protecting bag portion that is expanded between at least a chest portion of the seated passenger and the vehicle body side portion, wherein the side airbag is formed in a substantially rectangular shape in side view, the chest portion protecting bag portion having a top-bottom two-level chamber structure defining an upper-side chamber and a lower-side chamber and including a non-inflating portion that is substantially L-shaped in side view, to which the gas is not supplied, the non-inflating portion extending from a peripheral edge portion of a vehicle front side of the side airbag to outer peripheral portions of the waist portion protecting bag portion and the chest portion protecting bag portion and having a substantially vertical section extending vertically along the peripheral edge portion of the vehicle front side of the side airbag and a substantially horizontal section extending horizontally between the lower-side chamber of the chest portion protecting bag portion and the waist portion protecting bag portion, so that a front-most end portion of the lower-side chamber of the chest portion protecting bag portion is arranged at a position closer to a vehicle rear side than is a front-most end portion of the waist portion protecting bag portion, the side airbag is configured such that, at a time of expansion, (i) gas that is jetted out from the inflator is supplied more promptly to the waist portion protecting bag portion than to the chest portion protecting bag portion, (ii) a front side upper end portion of the waist portion protecting bag portion slips between the seated passenger and a lower side of a webbing for waist portion restraining that is strip shaped and restrains the waist portion of the seated passenger so as to be located beneath the lower side of the webbing for waist portion restraining, and (iii) the chest portion protecting bag portion is arranged at an upper side of the webbing for waist portion restraining via the non-inflating portion, the non-inflating portion is structured as a portion of two cloths that is formed by two base cloths being overlapped, the non-inflating portion is surrounded by an outer peripheral sewn portion at the peripheral edge portion of the vehicle front side and an inner side sewn portion along outer shapes of the waist portion protecting bag portion and the chest portion protecting bag portion, and the non-inflating portion connects, in a vehicle vertical direction, the waist portion protecting bag portion and the chest portion protecting bag portion.