Patent ID: 8820785

Claim:
An airbag apparatus comprising: an airbag that is planar before supply of inflation gas and is inflated by supply of the inflation gas; an entire inflation portion provided in the airbag; a partition member that partitions the entire inflation portion into at least an upstream inflation portion and a downstream inflation portion; and a pressure regulating valve that is closed at an early stage of a supply period of the inflation gas to the entire inflation portion, thereby restricting flow of the inflation gas from the upstream inflation portion to the downstream inflation portion, and is opened from the middle of the supply period to cancel the restriction, wherein the pressure regulating valve includes a slit-like inner opening that is provided on the partition member, and a pair of valve body portions that are provided around the inner opening and are selectively close to and separated from each other, the partition member has opposing ends facing each other and is bent in half by being folded along a bend line such that the opposing ends are close to each other, and the partition member folded in half is disposed in the entire inflation portion in an uninflated and deployed state in the state where the bend line is located upstream of the opposing ends, and is joined with the airbag at both opposing ends and both ends in a direction along the bend line, the partition member is formed by overlapping ends of two members with each other in the form of a band such that end edges of the members match with each other, and joining the members along overlapping portions, the inner opening is formed by canceling joint of a part of the two joined members, and a part of the overlapping portions that corresponds to the inner opening constitutes the valve body portions.