Airbag device and passenger protection device

Patent metadata

Field	Value
Publication number	US-12296776-B2
Application number	US-202318374012-A
Country	US
Kind code	B2
Filing date	Sep 28, 2023
Priority date	Oct 14, 2022
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

An airbag device has an airbag. The airbag has a front-rear chamber and an airbag main body. The front-rear chamber has a left and right pair of front-rear extending portions that pass by respective left and right sides of a head of a passenger and inflate and deploy toward the seat front side, and a connecting portion connecting front end portions of the pair of front-rear extending portions in a seat left-right direction. The airbag main body inflates and deploys toward a side of the passenger at a seat rear side of the connecting portion, later than the front-rear chamber. The airbag main body has a downward-force applying portion that applies force directed toward a seat lower side to the airbag at a time when the passenger is restrained by the airbag.

First claim

What is claimed is:

1. An airbag device, comprising:
an inflator configured to generate gas at a time of a collision of a vehicle; and
an airbag to which the gas is supplied, and that is configured to inflate and deploy from a seat rear side of an upper portion of a vehicle seat toward a seat front side,
wherein the airbag has:
a front-rear chamber having a left and right pair of front-rear extending portions that pass by respective left and right sides of a head of a passenger seated in the vehicle seat and inflate and deploy toward the seat front side, and a connecting portion connecting front end portions of the pair of front-rear extending portions in a seat left-right direction;
an airbag main body configured to receive the gas from the connecting portion to inflate and deploy toward a side of the passenger at the seat rear side of the connecting portion, later than the front-rear chamber; and
a restraint portion coupled to at least one of the front-rear chamber, the connecting portion, and the airbag main body and configured to engage the vehicle seat or the vehicle and apply force directed toward a seat lower side to the airbag at a time when the passenger is restrained by the airbag,
wherein the left and right pair of front-rear extending portions are formed in elongated tube shapes that pass by the respective left and right sides of the head of the passenger seated in the vehicle seat and inflate and deploy toward the seat front side and diagonally downward.

2. The airbag device of claim 1 , wherein:
the airbag main body has:
a chest/abdomen restraining portion restraining a chest and an abdomen of the passenger further toward a seat lower side than the front-rear chamber, and
a head restraining portion restraining the head of the passenger further toward a seat upper side than the front-rear chamber, before restraining of the chest and the abdomen by the chest/abdomen restraining portion; and

the restraint portion is the head restraining portion.

3. The airbag device of claim 1 , wherein the restraint portion is a ceiling abutting portion provided at an upper portion of the airbag main body, and abutting a ceiling of the vehicle at a time of restraining.

4. The airbag device of claim 1 , wherein the restraint portion is a left and right pair of rear tethers having respective one end portions that are attached to the pair of front-rear extending portions, and having respective other end portions that are attached to a seatback of the vehicle seat or to a vehicle body further toward the seat rear side than the passenger, and that, at the time of restraining, pull the pair of front-rear extending portions in toward obliquely rearward and downward sides of the seat.

5. The airbag device of claim 1 , wherein the airbag main body is formed such that a dimension thereof in the seat left-right direction in the inflated and deployed state gradually decreases toward a lower end portion.

6. A passenger protection device, comprising:
a vehicle seat in which a passenger sits; and
the airbag device of claim 1 , which is installed at the seat rear side of the upper portion of the vehicle seat.

7. The airbag device of claim 1 , wherein the airbag main body being in communication with the pair of front-rear extending portions and the connecting portion.

8. The airbag device of claim 1 , wherein the pair of front-rear extending portions being in communication with one another through the connecting portion.

9. An airbag device, comprising:
an inflator configured to generate gas at a time of a collision of a vehicle; and
an airbag to which the gas is supplied, and that is configured to inflate and deploy from a seat rear side of an upper portion of a vehicle seat toward a seat front side,
wherein the airbag has:
a front-rear chamber having a left and right pair of front-rear extending portions that pass by respective left and right sides of a head of a passenger seated in the vehicle seat and inflate and deploy toward the seat front side, and a connecting portion connecting front end portions of the pair of front-rear extending portions in a seat left-right direction; and
an airbag main body configured to receive the gas from the connecting portion for inflating and deploying toward a side of the passenger at the seat rear side of the connecting portion, later than the front-rear chamber,
wherein the front-rear chamber is formed such that a dimension thereof in the seat left-right direction in an inflated and deployed state is smaller at the seat front side than at the seat rear side.

10. The airbag device of claim 9 , wherein:
the airbag main body is formed such that a dimension thereof in the seat left-right direction in the inflated and deployed state is smaller at the seat front side than at the seat rear side, and
front portions of the pair of front-rear extending portions are sewn respectively to left and right side surfaces of the airbag main body that is in the inflated and deployed state.

11. A passenger protection device, comprising:
a vehicle seat in which a passenger sits; and
the airbag device of claim 9 , which is installed at the seat rear side of the upper portion of the vehicle seat.

12. The airbag device of claim 9 , wherein the front-rear chamber is formed such that a dimension thereof in a seat left-right direction in an inflated and deployed state narrows on progression forward in the front-rear direction.

13. The airbag device of claim 9 , wherein the airbag main body being in communication with the pair of front-rear extending portions and the connecting portion.

14. The airbag device of claim 9 , wherein the pair of front-rear extending portions being in communication with one another through the connecting portion.

15. An airbag device, comprising:
an inflator configured to generate gas at a time of a collision of a vehicle; and
an airbag to which the gas is supplied, and that is configured to inflate and deploy from a seat rear side of an upper portion of a vehicle seat toward a seat front side,
wherein the airbag has:
a front-rear chamber having a left and right pair of front-rear extending portions that pass by respective left and right sides of a head of a passenger seated in the vehicle seat and inflate and deploy toward the seat front side, and a connecting portion connecting front end portions of the pair of front-rear extending portions in a seat left-right direction, and
an airbag main body configured to receive the gas from the connecting portion for inflating and deploying toward a side of the passenger at the seat rear side of the connecting portion, later than the front-rear chamber; and
wherein a front side portion, which includes the airbag main body, of the airbag before inflation and deployment is rolled-up from both outer sides in the seat left-right direction toward a central side in the seat left-right direction.

16. A passenger protection device, comprising:
a vehicle seat in which a passenger sits; and
the airbag device of claim 15 , which is installed at the seat rear side of the upper portion of the vehicle seat.

17. The airbag device of claim 15 , wherein the airbag main body being in communication with the pair of front-rear extending portions and the connecting portion.

18. The airbag device of claim 15 , wherein the pair of front-rear extending portions being in communication with one another through the connecting portion.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ohno Mitsuyoshi
• Yamamoto Takeshi
• Iwama Toshiki
• Kusuhara Yoshito
• Ishii Tsutomu

Classifications

• B60R21/207 Primary

  in vehicle seats · CPC title

• B60R21/2338

  Tethers · CPC title

• B60R2021/23386

  External tether means · CPC title

• B60R21/264 Primary

  using instantaneous generation of gas, e.g. pyrotechnic (B60R21/268 takes precedence) · CPC title

• B60R21/231

  characterised by their shape, construction or spatial configuration · CPC title