Airbag device

Patent metadata

Field	Value
Publication number	US-10836343-B2
Application number	US-201615778950-A
Country	US
Kind code	B2
Filing date	Nov 28, 2016
Priority date	Nov 26, 2015
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

An airbag device 100 includes: an inflator 112 that is provided in a vehicle and capable of supplying gas; and an outer bag 114 that inflates, by using the gas, in a prescribed shape in front of an occupant 134 sitting in a seat 102 of the vehicle. The outer bag 114 includes an outside base fabric 122 forming an outer surface thereof, an opening part 126 provided in a prescribed area of the outside base fabric 122 , and an inside base fabric 124 forming an inner peripheral surface thereof recessed in a concave shape from the opening part 126 and inflating so as to protrude partially from the opening part 126 to a side of the seat. In the airbag device 100 , the inside base fabric 124 has lower tension than the outside base fabric 122 and restrains the occupant 134.

First claim

The invention claimed is:

1. An airbag device for an occupant of a seat of a vehicle comprising:
an inflator that is provided in the vehicle and capable of supplying an inflation gas; and
an outer bag that inflates, by using the gas, in a prescribed shape in front of the occupant sitting in the seat of the vehicle, wherein
the outer bag includes;
an outside base fabric forming an outer surface thereof,
an opening part provided in a prescribed area of the outside base fabric, and
an inside base fabric forming an inner peripheral surface thereof recessed in a concave shape from the opening part and inflating so as to protrude partially from the opening part,
wherein the inside base fabric has lower tension than the outside base fabric upon inflation by the gas for restraint of the occupant,
wherein an inner bag is provided inside the outer bag so as to be surrounded by the inside base fabric and inflates in a bag shape independently from the outer bag,
wherein a communication hole is provided on the inner bag and causes the gas received by the inner bag from the inflator to be discharged therethrough, and
wherein the outer bag is connected to the communication hole and inflates using the gas received through the communication hole.

2. The airbag device according to claim 1 , further comprising, a protrusion amount of the inside base fabric with respect to the outside base fabric is changeable according to a capacity of the inner bag.

3. The airbag device according to claim 1 , further comprising, a band-shaped inner tether that is bridged across at least two places of the outside base fabric inside the outer bag in a state of penetrating the inside base fabric and the inner bag.

4. The airbag device according to claim 1 , further comprising,
the outer bag and the inner bag form a driver airbag, and
the inner bag and the inside base fabric are provided to restrain a head of the occupant.

5. The airbag device according to claim 1 , further comprising,
the outer bag and the inner bag form a passenger airbag, and
the inner bag and the inside base fabric are provided to restrain a head of the occupant.

6. The airbag device according to claim 1 , further comprising,
the outer bag and the inner bag form a knee airbag, and
the inner bag and the inside base fabric are provided to restrain a knee of the occupant.

7. The airbag device according to claim 6 , further comprising,
the opening part is formed in a rectangular shape having long sides thereof extending in a vehicle width direction, and
the inside base fabric inflates along short sides of the opening part.

8. The airbag device according to claim 1 , further comprising, the inner bag is caused to inflate before the outer airbag is caused to inflate upon the inflator supplying the inflation gas.

9. The airbag device according to claim 1 , further comprising, upon inflation of the airbag device the outer bag and the inner bag are positioned at approximately the same distance from the occupant.

10. The airbag device according to claim 1 , further comprising, upon inflation of the airbag device the inner bag is positioned closer to the occupant than the outer bag.

11. An airbag device for an occupant of a seat of a vehicle comprising:
an inflator that is provided in the vehicle and capable of supplying an inflation gas; and
an outer bag that inflates, by using the gas, in a prescribed shape in front of the occupant sitting in the seat of the vehicle, wherein
the outer bag includes;
an outside base fabric forming an outer surface thereof,
an opening part provided in a prescribed area of the outside base fabric, and
an inside base fabric forming an inner peripheral surface thereof recessed in a concave shape from the opening part and inflating so as to protrude partially from the opening part,
wherein the inside base fabric has lower tension than the outside base fabric upon inflation by the gas for restraint of the occupant,
wherein the outside base fabric is formed from a first outside base fabric and a second outside base fabric joined together at an outer perimeter thereof and the second outside base fabric defining the opening part and the first outside base fabric defining a penetration hole for receiving the inflation gas, and
wherein the inside base fabric is formed from a first inside base fabric and a second inside base fabric joined together at an outer perimeter thereof, and the second inside base fabric joined to the second outside base fabric defining the opening part and the first inside base fabric joined to the first outside base fabric to define the penetration hole.

12. An airbag device for an occupant of a seat of a vehicle comprising:
an inflator that is provided in the vehicle and capable of supplying an inflation gas; and
an outer bag that inflates, by using the gas, in a prescribed shape in front of the occupant sitting in the seat of the vehicle, wherein
the outer bag includes;
an outside base fabric forming an outer surface thereof,
an opening part provided in a prescribed area of the outside base fabric, and
an inside base fabric forming an inner peripheral surface thereof recessed in a concave shape from the opening part and inflating so as to protrude partially from the opening part,
wherein the inside base fabric has lower tension than the outside base fabric upon inflation by the gas for restraint of the occupant,
wherein an inner bag is provided inside the outer bag so as to be surrounded by the inside base fabric and inflates in a bag shape independently from the outer bag, and
wherein, upon inflation of the airbag device, the outer bag is positioned closer to the occupant than the inner bag.

Assignees

• Autoliv Dev

Inventors

• Nakajima Yutaka
• Ishigaki Ryota

Classifications

• B60R21/2338 Primary

  Tethers · CPC title

• B60R2021/23308

  the individual compartments defining the external shape of the bag · CPC title

• B60R2021/23332

  using independent bags, one within the other · CPC title

• B60R21/203

  in steering wheels or steering columns · CPC title

• B60R2021/23382

  Internal tether means · CPC title