Patent attributes
A seat provided in a vehicle interior of the vehicle; a side airbag having a plurality of chambers each folded, the side airbag being stored in a side portion of a seat back; an inflator arranged together with the side airbag, the inflator suppling gas to the plurality of chambers when a side-impact crash of the vehicle is detected; a channel section for distributing the gas generated from the inflator to the plurality of chambers; a valve unit provided in the channel section, the valve unit reducing the distributed amount of the gas flowing from the channel section to a particular chamber among the plurality of chambers; and an actuator unit that allows the valve unit to operate to reduce the distributed amount of the gas flowing from the channel section to the particular chamber according to the deployment behavior of any chamber among the plurality of chambers, are included.