Curtain airbag device

Patent metadata

Field	Value
Publication number	US-10960842-B2
Application number	US-201716306765-A
Country	US
Kind code	B2
Filing date	May 17, 2017
Priority date	Jun 3, 2016
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

A curtain airbag device with which the position of a tether that pulls an end chamber during inflation and deployment thereof can be stabilized, thereby stabilizing the deployment behavior of the end chamber. A curtain airbag device 100 is housed in a side face upper portion of a vehicle cabin and inflated and deployed along the side face, and includes a main chamber 132 that is inflated and deployed using gas from an inflator 122, an end chamber 134 that is disposed on a front end 136 of the main chamber and inflated and deployed by gas received from the main chamber, a tab 144 attached to an upper portion of the main chamber, a bracket 128 fixed to the side face upper portion of the vehicle cabin, the tab being passed through the bracket, and a tether 126 attached so as to extend from a front end 138 of an upper portion of the end chamber to the bracket, wherein a length La of the tether is shorter than a distance Lb from the front end of the upper portion of the end chamber to the bracket in a case where the main chamber and the end chamber are inflated and deployed without the tether.

First claim

The invention claimed is:

1. A curtain airbag device that is housed in a side face upper portion of a vehicle cabin and inflated and deployed along the side face, the curtain airbag device comprising:
a main chamber that is inflated and deployed using a gas from an inflator;
an end chamber that is disposed on a front end of the main chamber and inflated and deployed by the gas received from the main chamber;
a tab attached to an upper portion of the main chamber;
a bracket fixed to the side face upper portion of the vehicle cabin, the tab being passed through the bracket; and
a tether attached so as to extend from a predetermined location on an upper portion of the end chamber to the bracket,
wherein a length of the tether is shorter than a distance from the predetermined location to the bracket in a case where the main chamber and the end chamber are inflated and deployed without the tether.

2. The curtain airbag device according to claim 1 further comprising, the tab and the tether are formed in the shape of strips, and
the bracket includes:
a first through-hole extending in a vehicle front-rear direction, through which the tab is passed; and
a second through-hole extending in a vehicle up-down direction, through which the tether is passed.

3. The curtain airbag device according to claim 2 further comprising, the second through-hole is provided further toward a side of the end chamber than a vehicle front-rear direction center of the bracket.

4. The curtain airbag device according to claim 2 further comprising, the second through-hole is provided on an upper side of the first through-hole.

5. The curtain airbag device according to claim 2 further comprising, the bracket includes:
a flat plate-shaped base; and
a flat plate-shaped bent portion that is bent from a lower end of the base so as to extend toward a vehicle inner side,
the first through-hole being provided in the base, and
the second through-hole being provided in the bent portion.

6. The curtain airbag device according to claim 1 further comprising, the predetermined location is a front end of the upper portion of the end chamber.

7. The curtain airbag device according to claim 1 further comprising, the predetermined location is the center of the upper portion of the end chamber.

8. The curtain airbag device according to claim 1 further comprising, the bracket includes a hook that is hooked to the side face upper portion.

9. The curtain airbag device according to claim 1 further comprising a strap that is attached so as to extend from a front pillar of the vehicle to a boundary between the main chamber and the end chamber along a vehicle outer side of the end chamber.

10. A curtain airbag device that is housed in a side face upper portion of a vehicle cabin and inflated and deployed along the side face, the curtain airbag device comprising:
an airbag cushion that is inflated and deployed using a gas from an inflator;
a first tab attached to an upper portion of the airbag cushion, and a second tab provided adjacent to the first tab on the upper portion of the airbag cushion at an interval from the first tab in a vehicle front-rear direction;
a bracket fixed to the side face upper portion of the vehicle cabin, the first tab being passed through the bracket; and
a first tether attached so as to extend from a first predetermined location between the first tab and the second tab on the upper portion of the airbag cushion to the bracket.

11. The curtain airbag device according to claim 10 further comprising, the bracket includes:
a first through-hole extending in the vehicle front-rear direction, through which the first tab is passed; and
a second through-hole extending in a vehicle up-down direction, through which the first tether is passed.

12. The curtain airbag device according to claim 10 further comprising:
a third tab provided at an interval from the first tab in the vehicle front-rear direction on an opposite side to the second tab; and
a second tether attached so as to extend from a second predetermined location between the first tab and the third tab on the upper portion of the airbag cushion to the bracket.

13. The curtain airbag device according to claim 12 further comprising, the bracket includes:
a first through-hole extending in the vehicle front-rear direction, through which the first tab is passed;
a second through-hole extending in a vehicle up-down direction, through which the first tether is passed; and
a third through-hole extending in the vehicle up-down direction, through which the second tether is passed.

14. The curtain airbag device according to claim 13 further comprising, the second through-hole in the bracket is provided further toward the side of the first predetermined location than a vehicle front-rear direction center of the bracket, and
the third through-hole is provided further toward the side of the second predetermined location than the vehicle front-rear direction center of the bracket.

15. The curtain airbag device according to claim 13 further comprising, the second through-hole and the third through-hole are provided on an upper side of the first through-hole.

16. The curtain airbag device according to claim 13 further comprising, the bracket includes:
a flat plate-shaped base;
a first extension portion extending from the base to the side of the first predetermined location; and
a second extension portion extending from the base to the side of the second predetermined location,
the first through-hole being provided in the base,
the second through-hole being provided in the first extension portion, and
the third through-hole being provided in the second extension portion.

17. The curtain airbag device according to claim 10 further comprising, the bracket includes a hook that is hooked to the side face upper portion.

Assignees

• Autoliv Dev

Inventors

• Shimizu Takayuki
• Nogami Mitsuo
• Tamura Kazuya

Classifications

• B60R21/232 Primary

  Curtain-type airbags deploying mainly in a vertical direction from their top edge · CPC title

• B60R21/23138

  specially adapted for side protection (B60R21/23184, B60R21/232 take precedence) · CPC title

• B60R2021/23386

  External tether means · CPC title

• B60R21/2338

  Tethers · CPC title

• B60R21/213 Primary

  in vehicle roof frames or pillars · CPC title