Air bag device
First Claim
1. An air bag device having an air bag body which expands to unfold in an interior of a vehicle, said air bag body comprising:
- an outer air bag body having a low permeability contact area facing a vehicle occupant when unfolded and vent holes spaced from the contact area and communicating with an exterior of said air bag body; and
an inner air bag body having a capacity smaller than that of said outer air bag body and unfolding in an interior of said outer air bag body, said inner air bag body being formed with a high gas permeability at a surface of the inner air bag body facing a vehicle occupant and the contact area of the outer air bag body at the time the air bag body unfolds, wherein when the vehicle occupant abuts against said outer air bag body, a portion of the contact area of said outer air bag body pressed by the vehicle occupant abuts said inner air bag body so as to control the quantity of gas flowing from said inner air bag body into said outer air bag body and out through the vent holes.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided an air bag device of the present invention which allows generation of suitable reaction force which corresponds to a physical constitution of a vehicle occupant abutting against an air bag body. In the air bag device, a region of an outer air bag body pressed by the vehicle occupant abuts an inner air bag body and closes vent holes formed in the inner air bag body. Therefore, a quantity of gas flowing from the inner air bag body into a space formed between the outer air bag body and the inner air bag body can be controlled. Accordingly, the quantity of gas flowing through the vent holes into the space and further escaping from the air bag body via vent holes formed in the outer air bag body can be adjusted in accordance with a physical constitution of the vehicle occupant abutting against the air bag body.
95 Citations
14 Claims
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1. An air bag device having an air bag body which expands to unfold in an interior of a vehicle, said air bag body comprising:
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an outer air bag body having a low permeability contact area facing a vehicle occupant when unfolded and vent holes spaced from the contact area and communicating with an exterior of said air bag body; and
an inner air bag body having a capacity smaller than that of said outer air bag body and unfolding in an interior of said outer air bag body, said inner air bag body being formed with a high gas permeability at a surface of the inner air bag body facing a vehicle occupant and the contact area of the outer air bag body at the time the air bag body unfolds, wherein when the vehicle occupant abuts against said outer air bag body, a portion of the contact area of said outer air bag body pressed by the vehicle occupant abuts said inner air bag body so as to control the quantity of gas flowing from said inner air bag body into said outer air bag body and out through the vent holes. - View Dependent Claims (2, 3)
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4. An air bag device having an air bag body which unfolds in an interior of a vehicle, said air bag body comprising:
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an outer air bag body having a low permeability contact area facing a vehicle occupant when unfolded and at least one first hole spaced from the contact area; and
an inner air bag body having a capacity smaller than that of said outer air bag body and unfolding in an interior of said outer air bag body, wherein said inner air bag body includes a plurality of second holes formed at least on a surface thereof substantially facing the contact area and a vehicle occupant at the time of unfolding the air bag body, said plurality of second holes being provided to allow communication between the interior of said inner air bag body and a space formed between said inner air bag body and said outer air bag body. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
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13. An air bag device having an air bag body which unfolds in an interior of a vehicle, said air bag body comprising:
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an outer air bag body having a low permeability contact area facing a vehicle occupant when unfolded and at least a first hole spaced from the contact area; and
an inner air bag body having a capacity smaller than that of said outer air bag body and unfolding in an interior of said outer air bag body, wherein said inner air bag body includes a coarsely woven or meshed cloth material on at least a surface thereof substantially facing the contact area and a vehicle occupant at the time of unfolding the air bag body, said coarsely woven or meshed cloth material being provided to allow gas flow between an interior of said inner air bag body and a space formed between said inner air bag body and said outer air bag body. - View Dependent Claims (14)
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Specification