Patent ID: 7631892

Claim:
An airbag disposed in an airbag device, comprising: the airbag having a circular shape when unfolded in a flat manner, and two straight lines which intersect at a center O of the airbag form horizontal reference axis X and vertical reference axis Y which define four quadrants consisting of an upper right quadrant, an upper left quadrant, a lower right quadrant and a lower left quadrant, an upper deployment portion consisting of the upper right and upper left quadrants and corresponding to a head of an occupant; a lower deployment portion consisting of the lower right and lower left quadrants and corresponding to a body of the occupant below the head; a right deployment portion consisting of the upper right and lower right quadrants and located on the right of the upper and lower deployment portions; a left deployment portion consisting of the upper left and lower left quadrants and located on the left of the upper and lower deployment portions; and a central deployment portion located at the intersection of the upper, lower, right, and left deployment portions over the center O, the lower deployment portion, the right deployment portion, and the left deployment portion being folded on an occupant side of the central deployment portion in an optional order to form a lower folded body comprising an entire area of the lower right and lower left quandrants, wherein at least one of the right deployment portion and the left deployment portion is folded on the most occupant side of the folded lower deployment portion, the upper deployment portion being folded to be superimposed on the most occupant side of an upper side of the folded right and left deployment portions and not superimposed on the lower folded body so that the lower deployment portion is restrained from deploying before the upper deployment portion.