Airbag device

Patent metadata

Field	Value
Publication number	US-11766985-B2
Application number	US-202017753041-A
Country	US
Kind code	B2
Filing date	Jun 30, 2020
Priority date	Aug 21, 2019
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

An airbag device installed in a vehicle seat having a seat cushion forming the seat surface and a seatback forming the backrest, and an inflator that generates expansion gas and an airbag that is deployed by the expansion gas released from said inflator. The airbag includes a pair of left and right side chambers that deploy forward from the side of the seatback and primarily protect the occupant's waist to shoulders, and an upper chamber that is continuous with the side chambers, deploys forward above the side chambers, and mainly protects the occupant's neck and head. On the left and right sides of the seatback, the location on the side where the seatbelt crosses near the shoulder is the first side, and the side opposite to said first side is the second side. A recess is formed on the first side of the airbag where the seatbelt fits.

First claim

The invention claimed is:

1. An airbag device for installation in a vehicle seat having a seat cushion forming a seat surface and a seatback forming a backrest, comprising:
an inflator that generates expansion gas; and
an airbag for deployment by expansion gas emitted from the inflator;
the airbag including a pair of left and right side chambers that deploy forward from the seatback and an upper chamber that is continuous with the side chambers and deploys forward above the side chambers,
the airbag including a recess for receiving a seatbelt,
wherein the recess is a slit that extends in a front-to-back direction when the airbag is deployed; and
wherein the slit includes a horizontal slit area extending in the front-to-back direction when the airbag is deployed and a vertical slit area extending in an upward direction from a back end of the horizontal slit area, and is formed in an L-shape as viewed from a vehicle width direction.

2. An airbag device for installation in a vehicle seat having a seat cushion forming a seat surface and a seatback forming a backrest, comprising:
an inflator that generates expansion gas; and
an airbag for deployment by expansion gas emitted from the inflator, the airbag including a pair of left and right side chambers that deploy forward from the seatback and an upper chamber that is continuous with the side chambers and deploys forward above the side chambers, the airbag including a recess for receiving a seatbelt,
wherein the recess is a slit that extends in a front-to-back direction when the airbag is deployed; and
wherein the slit includes a horizontal slit area extending in a front-to-back direction when the airbag is deployed and a vertical slit area extending up and down from a back end of the horizontal slit area, and is formed in an T-shape as viewed from a vehicle width direction.

3. The airbag device according to claim 1 , wherein the horizontal slit area is formed in a tapered shape getting narrower from a front to a back.

4. An airbag device for installation in a vehicle seat having a seat cushion forming a seat surface and a seatback forming a backrest, comprising:
at least one inflator that generates expansion gas; and
an airbag for deployment by expansion as emitted from the at least one inflator, the airbag including a pair of left and right side chambers that deploy forward from the seatback and an upper chamber that is continuous with the side chambers and deploys forward above the side chambers, the airbag including a recess for receiving a seatbelt,
wherein the airbag is configured so that deployment of the recess is restricted by a seat belt during an initial stage of airbag deployment, and then the recess is opened as an internal pressure of the airbag increases.

5. The airbag device according to claim 1 , wherein an upper part of the pair of side chambers is connected by the upper chamber.

6. The airbag device according to claim 5 , wherein the recess is formed on one of the left and right side chambers, and the upper chamber of the one of the left and right side chambers includes a first region in fluid communication with the side chamber of the one of the left and right side chambers and a second region in fluid communication with the side chamber on of the other of the left and right side chambers and the first and second regions are fluidly separated from each other.

7. The airbag device according to claim 6 , wherein the at least one inflator includes a pair of inflators stowed in the pair of side chambers.

8. The airbag device according to claim 7 , wherein the airbag is configured such that the expansion gas emitted from the pair of inflators flows from the pair of side chambers into the first and second regions of the upper chamber.

9. The airbag device according to claim 5 , where the recess is formed on one of the left and right side chambers, and wherein the upper chamber includes a first region in fluid communication with the side chamber on the one of the left and right side chambers a second region in fluid communication with the side chamber on the other of the left and right side chambers, and the first and second regions are mutually fluidly connected.

10. The airbag device according to claim 9 , wherein the recess is formed in one of the left and right side chambers of the airbag and the at least one inflator is stowed in one of the left and right side chambers of the airbag.

11. The airbag device according to claim 10 , wherein the airbag is configured so the expansion gas emitted from the at least one inflator flows from the side chamber on one of the left and right side chambers of the airbag, through the first region and second region of the upper chamber, and then to the side chamber on the other of the left and right side chambers of the airbag.

12. An airbag device for installation in a vehicle seat having a seat cushion forming a seat surface and a seatback forming a backrest, comprising:
an inflator that generates expansion gas; and
an airbag for deployment by expansion gas emitted from the inflator, the airbag including a pair of left and right side chambers that deploy forward from the seatback and an upper chamber that is continuous with the side chambers and deploys forward above the side chambers, the airbag including a recess for receiving a seatbelt,
wherein the recess is formed on one of the left and right side chambers of the airbag and a further recess is formed on the other of the left and right side chambers of the airbag.

13. The airbag device according to claim 6 , wherein the at least one inflator includes a back surface inflator stowed on the back surface of the seatback.

14. The airbag device according to claim 13 , wherein the airbag is configured so the expansion gas emitted from the at least one inflator flows at least into one of the side chamber on the left side chamber or the right side chamber.

15. The airbag device according to claim 1 , in combination with the vehicle seat.

16. The airbag device according to claim 1 , wherein the recess is formed on the first side of the airbag.

Assignees

• Autoliv Dev

Inventors

• Shimizu Takayuki
• Nakashima Atsushi

Classifications

• B60R21/23138 Primary

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

• B60R21/207 Primary

  in vehicle seats · CPC title

• B60R21/233

  comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other (B60R21/232 takes precedence) · CPC title

• B60R2021/23146

  seat mounted · CPC title

• B60R2021/23324

  Inner walls crating separate compartments, e.g. communicating with vents · CPC title