Airbag and airbag device
View Patent ↗An airbag and an airbag device allowing the airbag to stably stand by itself are provided. The airbag is usually folded and embedded in an instrument panel, and in an emergency, a gas is supplied to inflate and expand the airbag between a windshield and a passenger. Also, the airbag includes a front inflation portion inflating toward a windshield side, and a back inflation portion inflating toward a passenger side. The front inflation portion includes a bottom portion pressed against a surface of the instrument panel at a time of an inflation and expansion; and a front face portion which projects to the windshield side in a projecting shape.
1. An airbag folded and embedded in an instrument panel during a normal state, and supplied with a gas to inflate so as to self-stand between a windshield and a passenger in an emergency state, comprising:
a front inflation portion inflating toward a windshield side;
a back inflation portion inflating toward a passenger side; and
a rectification device disposed internally and controlling a gas flow, including a first opening portion supplying the gas to press the back inflation portion against the instrument panel on the passenger side, a second opening portion supplying the gas to press the front inflation portion against the instrument panel on the windshield side, and a third opening portion supplying the gas to lift the airbag upward,
wherein the front inflation portion includes a bottom portion pressed against a surface of the instrument panel at a time of an inflation, and a front face portion which projects toward the windshield side in a projecting shape, and
the front face portion has a height half of a height of the airbag or higher than a position of a gravity center of the airbag.
2. An airbag according to claim 1 , further comprising an inflator opening portion,
wherein a portion on the windshield side rather than the inflator opening portion forms the front inflation portion, and
a portion on the passenger side rather than the inflator opening portion forms the back inflation portion.
3. An airbag according to claim 1 , wherein the front inflation portion has a width of 15 to 100% in a front-back direction of a vehicle relative to the back inflation portion.
4. An airbag according to claim 1 , wherein the bottom portion has a length of 100 to 300 mm in a direction of the windshield.
5. An airbag according to claim 1 , wherein a boundary portion between the bottom portion and the front face portion forms a joint of a foundation cloth forming the airbag.
6. An airbag according to claim 1 , wherein the airbag inflates so as not to contact with the windshield.
7. An airbag device, comprising:
an airbag folded during a normal state, and inflated and expanded in an emergency state;
an inflator supplying a gas to the airbag;
a retainer fixing the airbag and the inflator; and
an airbag cover covering the airbag,
wherein the airbag is the airbag according to claim 1 .
8. An airbag folded and embedded in an instrument panel during a normal state, and supplied with a gas to inflate so as to self-stand between a windshield and a passenger in an emergency state, comprising:
a front inflation portion inflating toward a windshield side; and
a back inflation portion inflating toward a passenger side,
wherein the front inflation portion includes a bottom portion pressed against a surface of the instrument panel at a time of an inflation, and a front face portion which projects toward the windshield side in a projecting shape,
the front face portion has a height half of a height of the airbag or higher than a position of a gravity center of the airbag, and
the airbag inflates so as not to contact with the windshield.