Airbag and airbag apparatus

摘要

In order to provide an airbag (10) and an airbag apparatus in which a vent hole (18) is closed or opened only to a small extent until a passenger crashes into the airbag (10) and opened or opened to a large extent when the passenger crashes into the airbag (10), an interior of an airbag (10) is partitioned into a first chamber (1) at a center and a second chamber which surrounds the first chamber (1) by inner panels (22A, 22B). A rear panel (14) is provided with said vent hole (18) for communicating the second chamber (2) and the outside of the airbag. A lid member (60) for covering the vent hole (18) is provided on the outer surface side of the rear panel (14). A tether (joint member) (70) connects the lid member (60) with the inner panels (22A, 22B) through the vent hole (18).