Patent attributes
A vehicle occupant protection device has an airbag main body that is formed as a single integrated bag body that covers a head portion of a vehicle occupant and includes a forward-inflating portion housed in a headrest or in a seat back of a vehicle seat, and which inflates and deploys when supplied with gas, and which inflates on a seat front side of the head portion, and a pair of left and right side-inflating portions which inflate on seat side portions of the head portion. This vehicle occupant protection device also has a sub-bag portion that is provided in at least one of the forward-inflating portion and the side-inflating portions, and that, when an internal pressure inside the airbag main body reaches a predetermined value or greater, inflates after receiving an inflow of gas from at least one of the forward-inflating portion and the side-inflating portions.
