Side airbag device for vehicle
First Claim
1. A side airbag device for a vehicle comprising:
- a side airbag that includes a high-pressure chamber, which has a high pressure at a time of inflation and expansion, and a low-pressure chamber, which has a lower pressure than the high-pressure chamber, the high-pressure chamber and the low-pressure chamber each inflating and expanding at a time of side collision;
a partition wall that is disposed in the side airbag and partitions the high-pressure chamber from the low-pressure chamber;
an inflator that is disposed in the low-pressure chamber in a state in which a gas discharge section faces the high-pressure chamber and is disposed at the low-pressure chamber side relative to the partition wall, that supplies gas for inflation mainly toward the high-pressure chamber and that also supplies the gas for inflation to the low-pressure chamber; and
a check valve that is disposed at the partition wall, that permits the gas discharged from the gas discharge section of the inflator to flow from the low-pressure chamber to the high-pressure chamber, and that restricts a flow of the gas in the opposite direction;
wherein;
in the side airbag in an inflated and expanded state;
the inflator is disposed in the side airbag at a rear side with respect to a vehicle seat in a front-to-rear direction of the vehicle,the partition wall is disposed at a position that corresponds with an abdomen area of an occupant sitting on the vehicle seat,the high-pressure chamber is a lower chamber that corresponds with a waist area of the occupant, andthe low-pressure chamber is an upper chamber that corresponds with at least one of a chest area or a shoulder area of the occupant, andthe partition wall is formed by sewing together, of an upper fabric that constitutes the upper chamber, a lower edge of an outer side fabric that is disposed at an outer side with respect to the vehicle seat in a seat-width direction and a lower edge of an inner side fabric that is disposed at an inner side in a seat-width direction, andthe check valve is disposed at a rear side in the side airbag in a front-to-rear direction of the vehicle, and is formed by extending the upper fabric to a seat downward side.
1 Assignment
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Accused Products
Abstract
A side airbag has a high-pressure chamber and a low-pressure chamber with a pressure lower than the pressure in the high-pressure chamber. An inflator is provided in the low-pressure chamber with a gas discharge section facing the high-pressure chamber. In a side collision, gas from the inflator is supplied mainly toward the high-pressure chamber and is supplied also to the low-pressure chamber. The high-pressure chamber and the low-pressure chamber are partitioned by a partition wall. A check valve mounted to the partition wall is opened by the pressure gas supplied from the inflator, which is provided in the low-pressure chamber, toward the high-pressure chamber, and thus the cheek valve permits the gas to flow from the low-pressure chamber to the high-pressure chamber. When the inflator completes the discharge of the gas, the check valve restricts such flow of the gas from the high-pressure chamber to the low-pressure chamber.
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Citations
7 Claims
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1. A side airbag device for a vehicle comprising:
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a side airbag that includes a high-pressure chamber, which has a high pressure at a time of inflation and expansion, and a low-pressure chamber, which has a lower pressure than the high-pressure chamber, the high-pressure chamber and the low-pressure chamber each inflating and expanding at a time of side collision; a partition wall that is disposed in the side airbag and partitions the high-pressure chamber from the low-pressure chamber; an inflator that is disposed in the low-pressure chamber in a state in which a gas discharge section faces the high-pressure chamber and is disposed at the low-pressure chamber side relative to the partition wall, that supplies gas for inflation mainly toward the high-pressure chamber and that also supplies the gas for inflation to the low-pressure chamber; and a check valve that is disposed at the partition wall, that permits the gas discharged from the gas discharge section of the inflator to flow from the low-pressure chamber to the high-pressure chamber, and that restricts a flow of the gas in the opposite direction; wherein; in the side airbag in an inflated and expanded state; the inflator is disposed in the side airbag at a rear side with respect to a vehicle seat in a front-to-rear direction of the vehicle, the partition wall is disposed at a position that corresponds with an abdomen area of an occupant sitting on the vehicle seat, the high-pressure chamber is a lower chamber that corresponds with a waist area of the occupant, and the low-pressure chamber is an upper chamber that corresponds with at least one of a chest area or a shoulder area of the occupant, and the partition wall is formed by sewing together, of an upper fabric that constitutes the upper chamber, a lower edge of an outer side fabric that is disposed at an outer side with respect to the vehicle seat in a seat-width direction and a lower edge of an inner side fabric that is disposed at an inner side in a seat-width direction, and the check valve is disposed at a rear side in the side airbag in a front-to-rear direction of the vehicle, and is formed by extending the upper fabric to a seat downward side. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification