An airbag equipped with a sub-chamber may include a main chamber expanding by being injected with gas in a collision, and a sub-chamber formed by folding a panel-shaped chamber to be combined with the main chamber and have self-supporting force, the sub-chamber assisting supporting force of the main chamber by expanding with the main chamber.

[Problem] To provide an airbag apparatus in which the injury value of a passenger can be efficiently suppressed in an emergency. [Resolution Means] A typical configuration of an airbag apparatus 100 according to the present invention includes: an inflator 118 which is installed in a vehicle so as to be capable of supplying gas; an inner bag 112 which is expanded from in front of a seat utilizing the gas; and an outer bag 110 to which the gas is supplied from the inflator 118 or via the inner bag 112 and expanded so as to surround the inner bag 112. The outer bag 110 includes an opening 116 which exposes the inner bag 112 towards the seat 104, wherein the inner bag 112 has a more elongated shape in the anteroposterior direction of the vehicle than in the width direction of the vehicle, and the inner bag 112 further includes a restraining part 114 which is exposed on the recessed surface from the opening 116 to the seat side.

To contribute to stabilizing the restraining of a head portion. When an air bag inflates and expands in a side airbag device for a vehicle, a rear bag portion accommodating an inflator inflates and expands earlier than and at a higher pressure than a front bag portion. The front bag portion, that is low pressure and inflates and expands later, can be supported by the rear bag portion that is high pressure, and the front bag portion does not shake greatly. Moreover, the flow of gas from the rear bag portion that is high pressure to the front bag portion that is low pressure can be regulated by the upper and lower communication ports formed in a tether. Due to the above, the expansion behavior of the front bag portion can be stabilized, which can therefore contribute to the restraining of the head portion by the front bag portion.

An airbag includes a main bag section and a center bag section deployable to protrude towards a vehicle interior out of an inboard side of the main bag section. An inboard-side member, which forms the inboard side of the main bag section, is composed of a front component and a rear component. The center bag section includes a front wall and a rear wall. The front wall is composed of a rear extended region of the front component which is disposed in such a manner as to protrude rearward out of the rear edge of the front component. The rear wall is composed of a front extended region of the rear component which protrudes forward out of the front edge of the rear component and has a generally identical outer contour to the rear extended region. The center bag section is formed by jointing outer edges of the front and rear extended regions.

An airbag device includes an airbag including: an outer bag; and an inner bag disposed so as to inflate inside the outer bag and having supply ports through which the inflation gas is supplied to the outer bag, the outer hag and the inner hag sharing the inflow opening and the attachment portion. At least one of the supply ports is provided as a lower side supply port disposed in the lower side wall portion, and a gas guide tether that connects a vicinity of an outer edge side of the lower side supply port and the vehicle body side wall portion so as to be able to guide the inflation gas supplied from the lower side supply port to the vehicle body side wall portion side in an inner peripheral surface of the outer bag along a radial direction centered on the inflow opening is provided.

A vehicle occupant restraining device, comprising: a pair of air bags; an inner bag housed in at least one of the pair of air bags, is in communication with the at least one of the air bags, and is inflated and deployed inside the at least one of the air bags, on the sides of the body of a vehicle occu-pant; and a pair of pieces of tension cloth housed so as to extend along the respective sides of a housed pair of air bags, which are located on the opposite sides of the vehicle occupant, and then through the inside of the seat back of a seat into a seat cushion, wherein the inner bag completes inflation and deployment before the at least one of the air bags does, and the pair of pieces of tension cloth is deployed on the sides of the seat.

An assembly for a vehicle includes an airbag inflator. The assembly includes a curtain airbag including a main lobe and an inflatable flap. The main lobe and the inflatable flap are each inflatable by the airbag inflator to an inflated position. The main lobe includes an inboard panel and an outboard panel. The inflatable flap is at the inboard panel in the inflated position. The inflatable flap, in the inflated position, is at the inboard panel and abutting the inflator.

A vehicle occupant restraint system comprises a vehicle seat (12) which includes a backrest (15) with a seat back surface (24), the seat back surface (24) being provided for a vehicle occupant (26) seated in the vehicle seat (12) to lean against the same, and comprising an airbag module (16) integrated in the vehicle seat (12) which includes an airbag (18) being U-shaped in a horizontal section plane, wherein the airbag (18) includes an L-shaped restraining portion (20) and an L-shaped supporting portion (22), wherein the L-shaped restraining portion (20) has a fillable cushioning portion (30) forming a first leg of the L which is positioned along a seat longitudinal direction (L) spaced apart from the seat back surface (24) and which includes a baffle (42) being directed toward the seat back surface (24) and being provided to cushion the vehicle occupant (26), if he/she is displaced forward along the seat longitudinal direction (L), and includes a fillable connecting portion (32) forming a second leg of the L which connects the cushioning portion (30) to the vehicle seat (12), wherein the L-shaped supporting portion (22) includes a fillable first bearing portion (34) forming a first leg of the L and being positioned along a seat longitudinal direction (L) behind the backrest (14) and a second bearing portion (36) forming a second leg of the L which connects the first bearing portion (34) to the vehicle seat (12), wherein the connecting portion (32) of the restraining portion (20) and the second bearing portion (36) of the supporting portion (22) form a transverse leg (40) of the U, wherein the supporting portion (22) includes a bearing surface (44) directed toward the backrest (14) and counteracts a load (F) being directed away from the seat back surface (24) and acting on the restraining portion (20), if the vehicle occupant (26) impacts the baffle (42), so as to stabilize the restraining portion (20) relative to the vehicle seat (12).

An airbag device includes an airbag including: an outer bag; and an inner bag disposed so as to inflate inside the outer bag and having supply ports through which the inflation gas is supplied to the outer bag, the outer hag and the inner hag sharing the inflow opening and the attachment portion. At least one of the supply ports is provided as a lower side supply port disposed in the lower side wall portion, and a gas guide tether that connects a vicinity of an outer edge side of the lower side supply port and the vehicle body side wall portion so as to be able to guide the inflation gas supplied from the lower side supply port to the vehicle body side wall portion side in an inner peripheral surface of the outer bag along a radial direction centered on the inflow opening is provided.

[Problem] To provide an airbag apparatus in which the injury value of a passenger can be efficiently suppressed in an emergency.

[Resolution Means] A typical configuration of an airbag apparatus 100 according to the present invention includes: an inflator 118 which is installed in a vehicle so as to be capable of supplying gas; an inner bag 112 which is expanded from in front of a seat utilizing the gas; and an outer bag 110 to which the gas is supplied from the inflator 118 or via the inner bag 112 and expanded so as to surround the inner bag 112. The outer bag 110 includes an opening 116 which exposes the inner bag 112 towards the seat 104, wherein the inner bag 112 has a more elongated shape in the anteroposterior direction of the vehicle than in the width direction of the vehicle, and the inner bag 112 further includes a restraining part 114 which is exposed on the recessed surface from the opening 116 to the seat side.