Airbag with flow regulator
An airbag includes: an airbag body formed in a bag shape with an occupant-side panel facing an occupant and an opposite-side panel facing a steering wheel in a deployed state; and a flow regulator arranged inside the airbag body and configured to regulate a direction of flow of gas supplied from an inflator. The flow regulator includes: a flow-regulator body arranged such that at least part of the flow-regulator body faces the inflator; fixed portions provided at mutually separated positions on the flow-regulator body and fixed to the opposite-side panel; and a notch provided between the fixed portions in a recessed shape toward a center of the flow-regulator body and forming a gas passage port between the notch and the opposite-side panel, the gas passage port being a port through which the gas supplied from the inflator flows.
1. An airbag comprising:
a case provided in a boss of a steering wheel including a rim, the boss located inward of the rim, and a spoke connecting the rim and the boss;
a cover configured to cover the case;
an airbag body formed in a bag shape with an occupant-side panel facing an occupant and an opposite-side panel facing the steering wheel in a deployed state, housed in a folded state between the case and the cover, and configured to deploy toward a front of the occupant by expanding with gas supplied from an inflator and tearing apart the cover; and
a flow regulator arranged inside the airbag body and configured to regulate a direction of flow of the gas supplied from the inflator, wherein the flow regulator comprises:
a flow-regulator body arranged such that at least part of the flow-regulator body faces the inflator,
fixed portions provided at mutually separated positions on the flow-regulator body and fixed to the opposite-side panel, and
a notch provided between the fixed portions in a recessed shape toward a center of the flow-regulator body and forming a gas passage port between the notch and the opposite-side panel, the gas passage port being a port through which the gas supplied from the inflator flows,
the airbag body in the folded state comprises first packed portions and second packed portions packed toward a predetermined point and configured to deploy radially toward an outer periphery upon introduction of the gas,
the first packed portions are each folded in a wavy shape along a first fold line in a first predetermined direction, and
the second packed portions are each folded in a wavy shape along a second fold line in a second predetermined direction and further folded in a wavy shape along a third fold line in a direction crossing the second fold line, and arranged in a same direction as the notch of the flow regulator.
2. The airbag according to claim 1 , wherein
the first predetermined direction includes an upward direction, a downward direction, a leftward direction, and a rightward direction, and
the second predetermined direction includes an upper left direction, an upper right direction, a lower left direction, and a lower right direction.