Abstract: An airbag apparatus may include: a first chamber connected to an inflator, and supporting the head of a passenger in case of a head-on collision of a vehicle; a second chamber connected to one side of the first chamber, and suppressing the head of the passenger from moving in a diagonal direction in case of an oblique collision of the vehicle; a communication tube formed on the first chamber to introduce gas of the first chamber into the second chamber, and having a tightening channel formed along the circumference thereof; and a valve tether including: a tether ring installed through the inside of the tightening channel; and a tether puller connected to the tether ring to pull the tether ring in one direction, and closing the communication tube by pulling the tether ring when the first chamber is completely deployed.

Abstract: An airbag apparatus may include: a first chamber connected to an inflator, and supporting the head of a passenger in case of a head-on collision of a vehicle; a second chamber connected to one side of the first chamber, and suppressing the head of the passenger from moving in a diagonal direction in case of an oblique collision of the vehicle; a communication tube formed on the first chamber to introduce gas of the first chamber into the second chamber, and having a tightening channel formed along the circumference thereof; and a valve tether including: a tether ring installed through the inside of the tightening channel; and a tether puller connected to the tether ring to pull the tether ring in one direction, and closing the communication tube by pulling the tether ring when the first chamber is completely deployed.