Airbag device
First Claim
1. An airbag device in which an airbag housed in a folded state is deployed by gas generated by an inflator,wherein part of a base fabric of the airbag excluding an occupant restraining face is joined by first and second joining parts that extend in a deployment direction of the airbag, wherein the first joining part has a first length and the second joining part has a second length, said first length being greater than said second length such that the first joining part extends with said second joining part over the second length and extends beyond the second joining part in the deployment direction from an end of the second joining part, and wherein a total breaking strength of the first and second joining parts is greater at a location in which the first joining part extends with the second joining part than at a location in which the first joining part extends beyond the second joining part such that, as the airbag is deployed, the total breaking strength of the joining parts increases in going from an already deployed portion of the airbag toward a not yet deployed portion.
1 Assignment
0 Petitions
Accused Products
Abstract
An airbag device is provided in which since part of a base fabric of the airbag (16) excluding an occupant restraining face (16d) is joined by stitchings (S1 to S3) having breaking strengths that increase in going from an already deployed portion toward a not yet deployed portion, during the process of deploying the airbag by gas generated by an inflator, the stitchings (S1 to S3) of the airbag (16) break from the already deployed portion toward the not yet deployed portion, and the airbag (16) is continuously inflated from the occupant restraining face (16d) side toward the inflator side. As a result, it is possible to stabilize the shape of the airbag (16) during the process of deployment and to inflate the occupant restraining face (16d) of the airbag (16) at an early stage, thus ensuring occupant restraining performance. Further, since the airbag (16) is provided with a vent hole (16e) on a base (16c) side, maintaining the vent hole (16e) in a closed state until the airbag (16) is completely deployed enables the airbag (16) to be quickly deployed, and opening the vent hole (16e) after deployment of the airbag (16) is completed can prevent the internal pressure from increasing excessively.
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Citations
16 Claims
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1. An airbag device in which an airbag housed in a folded state is deployed by gas generated by an inflator,
wherein part of a base fabric of the airbag excluding an occupant restraining face is joined by first and second joining parts that extend in a deployment direction of the airbag, wherein the first joining part has a first length and the second joining part has a second length, said first length being greater than said second length such that the first joining part extends with said second joining part over the second length and extends beyond the second joining part in the deployment direction from an end of the second joining part, and wherein a total breaking strength of the first and second joining parts is greater at a location in which the first joining part extends with the second joining part than at a location in which the first joining part extends beyond the second joining part such that, as the airbag is deployed, the total breaking strength of the joining parts increases in going from an already deployed portion of the airbag toward a not yet deployed portion.
Specification