US 11,958,428 B2
Airbag device and vehicle seat
Takayuki Shimizu, Kanagawa (JP); and Atsushi Nakashima, Kanagawa (JP)
Assigned to Autoliv Development AB, Vargarda (SE)
Appl. No. 17/754,500
Filed by Autoliv Development AB, Vargarda (SE)
PCT Filed Sep. 2, 2020, PCT No. PCT/JP2020/033193
§ 371(c)(1), (2) Date Apr. 4, 2022,
PCT Pub. No. WO2021/065304, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 2019-184008 (JP), filed on Oct. 4, 2019.
Prior Publication US 2023/0242061 A1, Aug. 3, 2023
Int. Cl. B60R 21/207 (2006.01); B60R 21/215 (2011.01); B60R 21/231 (2011.01); B60R 21/237 (2006.01)
CPC B60R 21/207 (2013.01) [B60R 21/215 (2013.01); B60R 21/231 (2013.01); B60R 21/237 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An airbag device equipped in a vehicle seat having a seat cushion forming a seat surface, a seatback forming a backrest, and a headrest arranged at an upper part of the seatback, the airbag device comprising:
an inflator for generating inflation gas;
an airbag stowed at least within the seatback that expands based on expansion gas discharged from the inflator,
the airbag includes a pair of left and right side chambers configured to deploy from side parts of the seatback forward and an upper chamber that is provided continuously with the side chambers and configured to deploy above the head of an occupant,
a portion of the airbag corresponding to the upper chamber is stowed in a stowing part provided above the seatback on a rear surface of the headrest; and
a cover member disposed between the airbag and the seatback, the cover member configured to deploy toward the rear surface of the headrest in conjunction with deployment of the airbag,
wherein the cover member extends completely around the airbag prior to deployment of the airbag.