Airbag and airbag apparatus

Abstract

An airbag is formed by an airbag main body including a front panel disposed at a vehicle occupant side, and a rear panel disposed at a side opposite to the vehicle occupant side, combined at peripheral edge portions thereof. An inner panel partitions an interior of the airbag main body into a first chamber having an opening provided in the rear panel for facilitating inflation of the airbag, and a second chamber surrounding the first chamber. The inner panel is disposed such that a volume V1 of the first chamber is less than a volume V2 of the second chamber when the airbag main body is brought to completion of development by introduction of a fluid from an inflator. The device protects a vehicle occupant by expanding and developing both the first chamber and the second chamber in a well-balanced manner.

Dependencies are inferred from the claim text.