Airbag device
AssigneeHonda Motor Co., Ltd.
InventorsMakoto Nagai, Fumiharu Ochiai
Life of this patent
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Abstract
An airbag includes two base cloths sewn together at their outer peripheries by a seam extending from a central portion to the outer periphery of the base cloths into a vortical shape. When gas is supplied from an inflator to a center aperture of one of the base cloth to inflate the airbag, load generated by gas pressure breaks the seam sequentially from the central portion to the outer periphery, preventing sudden deployment of the airbag in fore and aft directions at the initial stage of deployment, thereby enabling not only soft restraining of passengers but also sufficient restraining by deploying the airbag into a final shape that is flat in fore and aft directions upon completion of breaking of the seam.
Claims15
An airbag device having an airbag, the airbag comprising first and second base cloths sewn at their outer peripheries, and inflated by supplying gas generated by an inflator to the inside of the airbag through a central portion of one base cloth upon collision of a vehicle,
- wherein the first and second base cloths are joined by a bonding portion continuously extending in a generally circumferential direction from the central portion towards the outer periphery,
- wherein load caused by inflation of the airbag breaks the bonding portion from the central portion towards the outer periphery,
- wherein thread used to sew the outer peripheries of the first and second base cloths is thicker and stronger than a breakaway thread used to sew the bonding portions between the first and second cloths, and
- wherein a radially inner end of the bonding portion has a separation strength larger than that of a remainder of the bonding portion.
An airbag device having an airbag, the airbag comprising:
- a non-breakaway portion;
- and
- a breakaway portion wherein a first and second base cloths are joined by a bonding portion continuously extending in a generally circumferential direction from the central portion towards the outer periphery and wherein a radially inner end of the bonding portion has a separation strength larger than that of a remainder of the bonding portion;
- wherein said air bag device is inflated by supplying gas generated by an inflator to the inside of the airbag through a central portion of one base cloth upon collision of a vehicle such that load caused by inflation of the airbag breaks the bonding portion from the central portion towards the outer periphery, and
- wherein thread used to form the non-breakaway portion is thicker and stronger than thread used to sew the breakaway portions between the first and second cloths.
Dependencies are inferred from the claim text.