| CPC B60R 21/23138 (2013.01) [B60R 21/2338 (2013.01); B60R 21/2346 (2013.01); B60R 2021/23146 (2013.01); B60R 2021/23382 (2013.01)] | 18 Claims |
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1. A side airbag installed on a side surface, which faces a passenger seat, of a seatback of a driver's seat, the side airbag comprising:
a main cushion provided with a flow hole and expandible by gas; and
a sub-cushion that is attached to the main cushion, the sub-cushion being connected to the flow hole,
wherein, when the main cushion expands after the airbag is actuated, the sub-cushion protrudes from the main cushion while being expanded by the gas supplied through the flow hole,
wherein, as the main cushion expands, the main cushion is deployed toward a front side of a vehicle between the driver's seat and the passenger seat, and the sub-cushion protrudes from a rear side of the main cushion toward a rear side of the vehicle,
wherein the main cushion includes a structure in which a first panel facing the driver's seat and a second panel facing the passenger seat are connected to be left and right symmetrical based on a central folding line, and
wherein the flow hole is formed in a structure that passes through a portion of each of the first panel and the second panel at the folding line.
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