Airbag device

An airbag device comprising:

• first and second side chambers;
• a center chamber disposed between the first and second side chambers;
• a front face panel that forms a surface on an occupant side of the center chamber;
• a first rear panel that forms an outer circumferential surface of the side chamber;
• a second rear panel having an outer shape substantially the same as that of the first rear panel, the side chambers formed by joining outer circumferences of the first rear panel and the second rear panel, and the center chamber formed by the second rear panel and the front face panel;
• and
• a gas supply section that supplies inflation gas to the first and second side chambers, and for introducing inflation gas to the center chamber;
• wherein each of the side chambers has a gas introduction space into which inflation gas from the gas supply section is introduced, an upper space that branches from the gas introduction space and extends upward, and a lower space that branches from the gas introduction space and extends downward.

An airbag comprising:

• a first rear panel having a first outer periphery;
• a second rear panel having a second outer periphery, the second outer periphery sewn to the first outer periphery to define first and second side chambers;
• a front panel cooperating with the second rear panel to define a center chamber between the first and second side chambers;
• and
• an inflator in fluid communication with the first and second side chambers for delivering an inflation gas thereto;
• wherein the center chamber receives the inflation gas from the first and second side chambers.