Side airbag device
First Claim
1. A side airbag device adapted to be mounted on a back portion of a seat of a vehicle, the airbag device comprising:
- an airbag that is housed in a housing in a folded-up configuration and is configured to be deployed forward when fed with an inflation gas by an inflator, the folded-up airbag having an elongated outer contour extending generally in an up and down direction as mounted on the seat;
a limitation member that is arranged around the folded-up airbag for constraining the airbag from protruding forward at airbag deployment, the limitation member being formed of a flexible sheet member and having a band shape, the limitation member comprising;
a pair of joint regions that are located at opposite ends of the limitation member and joined with the folded-up airbag; and
a loose region that is disposed between the joint regions and arranged around the folded-up airbag in such a manner as to be remote from the folded-up airbag, the loose region being disposed on a side of the folded-up airbag towards which the airbag protrudes, wherein a length of the loose region between the joint regions is longer than a length of an outer circumference of the folded-up airbag and shorter than a film length of the airbag as deployed, and wherein the loose region includes, in a region thereof in a deployment direction of the airbag, a tearable region that is tearable in such a manner as to split up the loose region between the joint regions at the airbag deployment,wherein;
the tearable region includes a starting point of tearing at one end thereof in the up and down direction;
the inflator is generally cylindrical in outer contour and is housed in a rear end region of the folded-up airbag;
the inflator is provided with gas discharge ports at a lower end thereof;
a lower edge of the loose region is located in a vicinity of a front region of the gas discharge ports;
the loose region includes a cut-out region that tapers towards the tearable region, the cut-out region constitutes the starting point of tearing of the tearable region;
the airbag includes a pelvis protecting portion for protecting a pelvis of an occupant seated in the seat at a lower end region of the airbag at deployment; and
the pelvis protecting portion protrudes out of the limitation member downwardly in the folded-up airbag.
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Accused Products
Abstract
A side airbag device includes a folded-up airbag and a limitation member disposed around the airbag for constraining the airbag from protruding forward at airbag deployment. The limitation member is formed of a flexible sheet member into a band shape, and is joined to the folded-up airbag by the opposite end regions. The limitation member includes a loose region which is arranged around the folded-up airbag in such a manner as to be remote from the folded-up airbag. The loose region is disposed on a side of the folded-up airbag towards which the airbag protrudes. The loose region includes a tearable region in the region in a deployment direction of the airbag.
24 Citations
7 Claims
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1. A side airbag device adapted to be mounted on a back portion of a seat of a vehicle, the airbag device comprising:
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an airbag that is housed in a housing in a folded-up configuration and is configured to be deployed forward when fed with an inflation gas by an inflator, the folded-up airbag having an elongated outer contour extending generally in an up and down direction as mounted on the seat; a limitation member that is arranged around the folded-up airbag for constraining the airbag from protruding forward at airbag deployment, the limitation member being formed of a flexible sheet member and having a band shape, the limitation member comprising; a pair of joint regions that are located at opposite ends of the limitation member and joined with the folded-up airbag; and a loose region that is disposed between the joint regions and arranged around the folded-up airbag in such a manner as to be remote from the folded-up airbag, the loose region being disposed on a side of the folded-up airbag towards which the airbag protrudes, wherein a length of the loose region between the joint regions is longer than a length of an outer circumference of the folded-up airbag and shorter than a film length of the airbag as deployed, and wherein the loose region includes, in a region thereof in a deployment direction of the airbag, a tearable region that is tearable in such a manner as to split up the loose region between the joint regions at the airbag deployment, wherein; the tearable region includes a starting point of tearing at one end thereof in the up and down direction; the inflator is generally cylindrical in outer contour and is housed in a rear end region of the folded-up airbag; the inflator is provided with gas discharge ports at a lower end thereof; a lower edge of the loose region is located in a vicinity of a front region of the gas discharge ports; the loose region includes a cut-out region that tapers towards the tearable region, the cut-out region constitutes the starting point of tearing of the tearable region; the airbag includes a pelvis protecting portion for protecting a pelvis of an occupant seated in the seat at a lower end region of the airbag at deployment; and the pelvis protecting portion protrudes out of the limitation member downwardly in the folded-up airbag. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification