The present disclosure relates to a leg protection device for an occupant protection system of a vehicle. The leg protection device includes an airbag module. The airbag module includes an airbag and a gas generator that inflates the airbag to a deployed state such that the airbag is disposed in the footwell and in front of a vehicle seat. The airbag includes a first chamber and a second chamber fluidically connected to the first chamber. The first chamber and the second chamber are deployed in the footwell to protect an occupant when the airbag is set in the deployed state. The first chamber is connected to the second chamber by a flexible connection region that diverts the airbag along the object in any spatial direction when the airbag encounters the object during deployment in the footwell.

An airbag device includes an airbag. A passenger protection portion of the airbag has a frontal collision restraint surface, an oblique collision restraint surface, and a restraint recess portion. The airbag has a recess portion tether that couples a tip side of a recess of the restraint recess portion and a front end side of the airbag to each other, and at least one longitudinal tether that couples the front end side of the airbag and a recess portion-side region that is located on the restraint recess portion side with respect to a center of the frontal collision restraint surface in a lateral direction to each other, inside the airbag. The frontal collision restraint surface has at least two protruding surfaces that are configured to protrude backward, due to the longitudinal tether. The at least two protruding surfaces are arranged in alignment in the lateral direction.

The invention relates to an airbag (14) for unfolding between a vehicle part (10) and a vehicle occupant (18), comprising an impact wall (20) which, in the installed and unfolded state of the airbag (14), faces a vehicle occupant (18) and a circumferential wall (22) which is connected to the impact wall (20) and, in the installed and unfolded state of the airbag (14), extends between the impact wall (20) and the vehicle part (10), wherein the circumferential wall (22) is made with multiple layers, at least in some sections, and forms at least one annular tube (23) which delimits an annular inflatable first airbag volume (V1), and wherein a radially inner layer (26) of the circumferential wall (22), together with the impact wall (20), delimits an inflatable second airbag volume (V2) that is separate from the first airbag volume (V1). The invention further relates to an airbag module (12) having such an airbag (14).

[Problem] To expand and deploy a hood-shaped airbag in a reliably sandwiched condition between the top of a shoulder of a seated occupant and a seatbelt in a normal set condition during a collision, and reduce injury to the occupant by a device other than an airbag such as a seatbelt or the like.

[Resolution Means] An airbag device 11 contains an airbag 12 and inflator 13 integrally covering the head 2a and a side portion of a seated occupant 2. The airbag 12 in a flat condition prior to folding has a plurality of chambers 12c demarcated in a longitudinal direction. The chamber 12c has a head protecting chamber 12ca stored in an upper portion of a backrest portion 1b of a seat 1 and a pair of side protecting chambers 12cb stored in opposing positions separated in a vehicle width direction on both left and right sides of the backrest portion 1b. At the time of expansion and deployment, the side protecting chamber 12cb expands and deploys between the seatbelt 3 and occupant 2, and thus the airbag 12 is configured such that a space S is formed between the occupant 2 and airbag 12 deployed at a position where the seatbelt 3 passes.

There is proposed a vehicle seat configured to support an occupant (42) in a sitting position, the seat comprising: a squab (27), a backrest (28), and an airbag unit. The airbag unit comprises an inflatable airbag (1) provided in an initially rolled and/or folded airbag package (33), and an inflator (34) actuable to direct inflating gas into the airbag (1) to inflate the airbag into an inflated configuration. The airbag (1) comprises a pair of inflatable chambers (8, 9) which are physically connected to one another via a connecting interface (17), and are fluidly isolated from one another. The airbag unit is mounted and configured such that, upon actuation of said inflator (34) to inflate the airbag (1), said inflatable chambers (8, 9) inflate into respective deployed positions in which they: i) extend forwardly from respective opposing and laterally spaced-apart side regions of said backrest (28); and ii) extend upwardly, and laterally inwardly across an uppermost region of the seat towards said connecting interface (17), so as to thereby cooperate to define an inflated shroud around at least an uppermost region of the backrest (28) so as to extend over said sitting position and provide lateral protection to a said occupant (42) of the seat in said sitting position.

A restraint system (10) for helping to protect an occupant (60) of a vehicle (20) having a roof (32) and a cabin (40) including a seat (50) for the occupant (60) has an airbag (70). The airbag (70) has a stored condition within the roof (32) and is inflatable to a deployed condition extending into the cabin (40) and aligned with the seat (50). The airbag (70) includes a first portion (94) defining a first chamber (100) and a second portion (104) defining a second chamber (110). The first portion (94) is connected to the vehicle (20) and includes a vent (106). The first portion (94), in response to occupant (60) penetration with the second portion (104), vents inflation fluid from the vent (106) and elongates to enable folding of the airbag (70) away from the occupant (60).

A restraint system for helping to protect an occupant (60) of a vehicle (20) includes a first inflator (74) for providing inflation fluid at a first fluid pressure and a second inflator (76) for providing inflation fluid at a second fluid pressure greater than the first fluid pressure. An airbag (70) includes a stored condition within a roof (32) and is inflatable to a deployed condition extending into a cabin (40) and aligned with a seat (50) for the occupant (60). The airbag (70) includes a first portion (98) defining a first chamber (100) fluidly connected to the first inflator (74) and a second portion (102) defining a second chamber (104) fluidly connected to the second inflator (76) and fluidly isolated from the first chamber (100). The first portion (98) moves relative to the second portion (102) in response to occupant (60) penetration into the airbag (70).

An airbag includes a bag body and an inlet port section of inflation gas. As a gas receivable region, the bag body includes a front main inflatable region, a rear main inflatable region, a feed path that feeds the inflation gas from the inlet port section to the front and rear main inflatable regions, and a sub inflatable region that absorbs the gas from the front main inflatable region when a pressure of the front main inflatable region soars. A front partitioning region partitions the front main inflatable region from the sub inflatable region. The front partitioning region is disposed in front of a front end of an upper partitioning region in an island-like fashion remote from other uninflatable region so as to provide, at the rear of and there beneath, one each communication passage that provides gas communication between the front main inflatable region and the sub inflatable region.

A side airbag apparatus which allows a reduced amount of base fabric and, enables gas to flow efficiently inside the cushion. An inflator (110) supplies gas, a cushion (104) in which base fabrics are formed into a bag shape and inflates and deploys to protect an occupant (118) during a vehicle emergency, a base fabric joint portion (120) which is provided to join main panels 108a and 108b of the cushion (104) in a linear manner and partitions the cushion (104) into a rear chamber (114), a front chamber (116), and an opening (123) provided midway along the base fabric joint portion (120). The base fabric joint portion (120) includes vent forming portions 125a and 125b arranged in two rows which extend from both ends of the opening (123) towards the front chamber (116) or rear chamber (114) and form a projecting vent (124). The projecting vent (124) permits flow of gas between the rear chamber (114) and the front chamber (116).

A side airbag device may include: an inflator mounted to a seat frame; a cushion unit covering the inflator and configured to be deployed by gas discharged from the inflator to protect a side portion of an occupant; and a tether unit mounted to the inflator and configured to enclose the cushion unit. The cushion unit may include: a cushion deployment part mounted to the inflator and configured to be deployed by gas discharged from the inflator; a cushion passing part formed in the cushion deployment part so that the tether unit passes through the cushion passing part; and a cushion penetration part formed in an upper end of the cushion deployment part so that the tether unit penetrates the cushion penetration part.