Airbag device and passenger protection device

A passenger protection device comprising:

• an inflator that generates gas during a vehicle collision;
• an airbag that is supplied with the gas generated by the inflator, and that inflates and deploys from a seat rear side of a vehicle seat toward a seat front side via a seat upper side;
• and
• a three-point seatbelt device provided at the vehicle seat to restrain a passenger,
• wherein, in an inflated and deployed state, the airbag includes:
• a pair of front-rear chambers extending in a seat front-rear direction via left and right sides of a head of a passenger seated in the vehicle seat;
• an airbag body that is in communication with the pair of front-rear chambers, and that the airbag body is disposed at a seat front side of the passenger between the pair of front-rear chambers;
• and
• a rear tether including a one-end portion attached to the airbag body or a seat front side portion of one of the pair of front-rear chambers, and an other-end portion attached to a seatback of the vehicle seat or a vehicle body, and
• wherein the rear tether is only provided on a non-shoulder belt side of the seatbelt device.

An airbag device comprising:

• an inflator that generates gas during a vehicle collision;
• and
• an airbag that is supplied with the gas generated by the inflator, and that inflates and deploys from a seat rear side of a vehicle seat toward a seat front side via a seat upper side,
• wherein, in an inflated and deployed state, the airbag includes:
• a pair of front-rear chambers extending in a seat front-rear direction via left and right sides of a head of a passenger seated in the vehicle seat;
• an airbag body that is in communication with the pair of front-rear chambers, and that is disposed at a seat front side of the passenger between the pair of front-rear chambers;
• and
• a pair of rear tethers including one-end portions attached to the airbag body or seat front side portions of the pair of front-rear chambers, and other-end portions attached to a seatback of the vehicle seat or a vehicle body, and
• wherein at least a rear tether, of the pair of rear tethers, on a side door side is configured so as to be releasable after a collision of the vehicle,
• wherein at least the rear tether on the side door side is configured such that the other-end portion is removable from the seatback of the vehicle seat or the vehicle body after a specific period of time has elapsed from a collision of the vehicle occurring, and
• wherein the other-end portion of at least the rear tether on the side door side is configured so as to be released by actuation of a squib or a micro gas generator.