Vehicle center airbag device
A vehicle center airbag device, including: an inflator that is provided at a driver's seat, and that ejects gas due to being actuated; and a center airbag that is provided at a side portion, at a vehicle width direction inner side, of a seatback of the driver's seat, and that inflates and deploys toward a vehicle width direction inner side of an occupant seated in the driver's seat due to the gas being supplied to an interior thereof, wherein the center airbag includes, at a head restraining surface that restrains a head of an occupant seated in a passenger seat, a front and rear pair of concave portions having longitudinal directions along a seat up-down direction.
1. A vehicle center airbag device comprising:
an inflator that is provided at a driver's seat, and that ejects gas due to being actuated; and
a center airbag that is provided at a side portion, at a vehicle width direction inner side, of a seatback of the driver's seat, and that inflates and deploys toward a vehicle width direction inner side of an occupant seated in the driver's seat due to the gas being supplied to an interior thereof,
wherein the center airbag includes, at a head restraining surface that restrains a head of an occupant seated in a passenger seat, a front and rear pair of concave portions having longitudinal directions along a seat up-down direction,
wherein among the front and rear pair of concave portions, a concave portion at a seat rear side is formed at a position facing the head of the occupant seated in the passenger seat at the seat rear side when the driver's seat is at a frontmost side position and the passenger seat is at a rearmost side position.
2. The vehicle center airbag device according to claim 1 , wherein, among the front and rear pair of concave portions, a concave portion at a seat front side is formed at a position at which the head of the occupant seated in the passenger seat enters into the concave portion at the seat front side when the driver's seat is at a rearmost side position and the passenger seat is at a frontmost side position.
3. The vehicle center airbag device according to claim 1 , wherein:
each of the concave portions is formed by a planar tether that connects an inner side base cloth at a driver's seat side and an outer side base cloth at a passenger seat side, at the interior of the center airbag, and
a length of each tether along the seat up-down direction at a side of the tether that is sewn together with the outer side base cloth is formed to be shorter than a length of the tether along the seat up-down direction at a side of the tether that is sewn together with the inner side base cloth.
4. The vehicle center airbag device according to claim 1 , wherein the concave portions are respectively formed by boundary portions between the head restraining surface of the center airbag and a front and rear pair of sub-chambers that are provided at the head restraining surface with longitudinal directions thereof being along the seat up-down direction.
5. The vehicle center airbag device according to claim 2 , wherein:
each of the concave portions is formed by a planar tether that connects an inner side base cloth at a driver's seat side and an outer side base cloth at a passenger seat side, at the interior of the center airbag, and
a length of each tether along the seat up-down direction at a side of the tether that is sewn together with the outer side base cloth is formed to be shorter than a length of the tether along the seat up-down direction at a side of the tether that is sewn together with the inner side base cloth.
6. The vehicle center airbag device according to claim 2 , wherein the concave portions are respectively formed by boundary portions between the head restraining surface of the center airbag and a front and rear pair of sub-chambers that are provided at the head restraining surface with longitudinal directions thereof being along the seat up-down direction.
7. The vehicle center airbag device according to claim 3 , wherein the tether is one of a front and rear pair of tethers,
wherein each of the front and rear pair of tethers is formed in a substantially fan-shaped shape of the same size in a front view.
8. The vehicle center airbag device according to claim 7 , wherein plural circular through holes are formed at each tether above and below each other with an interval therebetween, and gaps having a predetermined size are respectively formed at an upper side of an upper side margin portion and at a lower side of a lower side margin portion of each tether.
9. The vehicle center airbag device according to claim 4 , wherein the front and rear pair of sub-chambers are integrally provided at a front end portion and a rear end portion of the head restraining surface of the center airbag, respectively, protruding toward the passenger seat.
10. The vehicle center airbag device according to claim 9 , wherein the front and rear pair of sub-chambers are each formed in a substantially columnar shape with a shape thereof, after inflation and deployment have been completed, having a longitudinal direction along the up-down direction, and extending from an upper end surface to a lower end surface of the center airbag in a side view.