Airbag device

An airbag device comprising:

• a gas generator configured to generate expansion gas;
• an airbag configured to expand and deploy due to the expansion gas to restrain an occupant;
• and
• a diffuser disposed inside the airbag to control a flow of the expansion gas;
• wherein:
• given that a direction toward the occupant is a first direction, the diffuser includes:
• a receiving surface disposed between the gas generator and the airbag in the first direction to receive the expansion gas discharged from the gas generator;
• and
• a plurality of connecting members having one end connected to an edge of the receiving surface and the other end directly or indirectly connected to the gas generator, and
• the plurality of connecting members further includes a base configured to be erected in the first direction in a deployed state above the gas generator and surround a periphery of the gas generator,
• the plurality of connecting members restrict movement of the receiving surface in the first direction,
• the expansion gas against the receiving surface is guided from an opening formed between the adjacent connecting members into the airbag,
• a width of the opening is larger than a width of the connecting member,
• when the airbag is viewed from the occupant, given that a 12 o'clock position and a 6 o'clock position in a plane perpendicular to the first direction are a position directly above the occupant and a position directly below the occupant, respectively,
• the openings are formed at 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock positions, and
• an area of the openings formed at the 12 o'clock and 6 o'clock positions is larger than an area of the openings formed at the 3 o'clock and 9 o'clock positions.

An airbag device comprising:

• a gas generator configured to generate expansion gas;
• an airbag configured to expand and deploy due to the expansion gas to restrain an occupant;
• and
• a diffuser disposed inside the airbag to control a flow of the expansion gas;
• wherein:
• given that a direction toward the occupant is a first direction, the diffuser includes:
• a receiving surface disposed between the gas generator and the airbag in the first direction to receive the expansion gas discharged from the gas generator;
• and a plurality of connecting members having one end connected to an edge of the receiving surface and the other end directly or indirectly connected to the gas generator, and
• the connecting members each further include a base configured to be erected in the first direction in a deployed state above the gas generator and surround a periphery of the gas generator,
• when the airbag is viewed from the occupant, given that a 12 o'clock position and a 6 o'clock position in a plane perpendicular to the first direction are a position directly above the occupant and a position directly below the occupant, respectively,
• the openings are formed at 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock positions,
• an area of the openings formed at the 12 o'clock and 6 o'clock positions is larger than an area of the openings formed at the 3 o'clock and 9 o'clock positions, and
• at deployment of the airbag, the receiving surface of the diffuser curves like a parachute, and the connecting members form concave and convex portions radially extending to the receiving surface.