US 12,030,455 B2
Side air bag apparatus for vehicle
Jiwoon Song, Yongin-si (KR); and Hae Kwon Park, Yongin-si (KR)
Assigned to HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed by HYUNDAI MOBIS CO., LTD., Seoul (KR)
Filed on Jun. 14, 2021, as Appl. No. 17/347,507.
Claims priority of application No. 10-2020-0076847 (KR), filed on Jun. 24, 2020.
Prior Publication US 2021/0402946 A1, Dec. 30, 2021
Int. Cl. B60R 21/233 (2006.01); B60R 21/207 (2006.01); B60R 21/231 (2011.01); B60R 21/239 (2006.01)
CPC B60R 21/233 (2013.01) [B60R 21/207 (2013.01); B60R 21/23138 (2013.01); B60R 21/239 (2013.01); B60R 2021/23146 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A side air bag apparatus for a vehicle, the side air bag apparatus comprising:
an inflator securely mounted to a seatback and configured to generate airbag gas;
a dual chamber including a first cushion and a second cushion,
the first cushion is configured to be expanded to protrude towards a side surface of the seatback by pressure of the airbag gas generated from the inflator after being folded with a hiding state in the seatback and to protect an upper body area of a passenger who has adopted a relax mode;
the second cushion is connected to the first cushion and configured to be expanded only by the pressure of the airbag gas transmitted thereto through the first cushion and to protect a head area of the passenger who has adopted the relax mode;
a single vent hole configured to connect the first cushion and the second cushion to each other, such that the airbag gas is transmitted from the first cushion to the second cushion through the single vent hole; and
a valve member configured to be operated to open and close the single vent hole in response to pressure of the first cushion or pressure of the second cushion, wherein the valve member is located in the second cushion and has opposite ends coupled to sides of the second cushion, by sewing, which is in contact with the head area when the second cushion is fully deployed,
wherein, based on two sewing lines by which the opposite ends of the valve member and the second cushion are coupled to each other, a length of the valve member located between the two sewing lines is configured longer than a length of the second cushion including the single vent hole and located between the two sewing lines.