Occupant restraint device for vehicle

Patent metadata

Field	Value
Publication number	US-2025282321-A1
Application number	US-202519063733-A
Country	US
Kind code	A1
Filing date	Feb 26, 2025
Priority date	Mar 6, 2024
Publication date	Sep 11, 2025
Grant date	—

Abstract

The occupant restraint device for a vehicle includes a seatbelt, which restrains an occupant P sitting on a vehicle seat at the vehicle seat, and a belt backing airbag. When gas is supplied to the belt backing airbag from an inflator at a time of frontal collision of the vehicle, the belt backing airbag inflates and expands between at least the shoulder belt of the seatbelt and the shoulder area of the occupant. Together with moving to a vehicle front side to follow the occupant moving to the vehicle front side due to inertial force, the belt backing airbag moves along the shoulder belt and maintains the state in which the belt backing airbag is interposed between at least the shoulder area of the occupant and the shoulder belt.

First claim

What is claimed is:

1 . An occupant restraint device for a vehicle, comprising:
a seatbelt that restrains an occupant sitting on a vehicle seat, at the vehicle seat; and a belt backing airbag that, when gas is supplied to the belt backing airbag from an inflator at a time of frontal collision of the vehicle, inflates and expands between at least a shoulder belt of the seatbelt and a shoulder area of the occupant, the belt backing airbag moving along the shoulder belt together with moving to a vehicle front side to follow the occupant moving to the vehicle front side due to inertial force, and the belt backing airbag maintaining a state in which the belt backing airbag is interposed between at least the shoulder area of the occupant and the shoulder belt.

2 . The occupant restraint device for a vehicle according to claim 1 , wherein the belt backing airbag is linked to the vehicle seat or a vehicle body via a cord-shaped member that is resiliently deformable so as to extend to follow movement of the occupant to the vehicle front side.

3 . The occupant restraint device for a vehicle according to claim 2 , wherein the belt backing airbag is connected with the inflator via a gas supply tube that is extensible to follow the movement of the occupant to the vehicle front side.

4 . The occupant restraint device for a vehicle according to claim 2 , wherein the belt backing airbag includes a slip cloth interposed between the occupant and the belt backing airbag.

5 . The occupant restraint device for a vehicle according to claim 4 , wherein a lower end portion of the slip cloth is fixed to a lower portion of the belt backing airbag at a side of the slip cloth at which the occupant is disposed.

6 . The occupant restraint device for a vehicle according to claim 2 , wherein the seatbelt is structured to enable pulling out from a belt aperture portion provided at a pillar, a belt guide is provided at a seat back of the vehicle seat, and a belt path is corrected by the belt guide such that the shoulder belt is worn at a front side of the shoulder area of the occupant.

7 . The occupant restraint device for a vehicle according to claim 2 , wherein the belt backing airbag inflates and expands so as to extend in a seat width direction and restrains both shoulder areas of the occupant, together with which at least one of a height or a thickness at least at an end portion of the belt backing airbag at a side of the shoulder belt is increased more than at other portions of the belt backing airbag.

8 . The occupant restraint device for a vehicle according to claim 2 , wherein a shape in a front view of the belt backing airbag at completion of inflation and expansion is formed as at least one of a shape that covers the shoulder area of the occupant along the shoulder belt, a shape that covers both shoulder areas and a chest area of the occupant, or a shape that covers from the chest area to a head area of the occupant.

9 . The occupant restraint device for a vehicle according to claim 3 , wherein the belt backing airbag includes a slip cloth interposed between the occupant and the belt backing airbag.

10 . The occupant restraint device for a vehicle according to claim 9 , wherein a lower end portion of the slip cloth is fixed to a lower portion of the belt backing airbag at a side of the slip cloth at which the occupant is disposed.

11 . The occupant restraint device for a vehicle according to claim 3 , wherein the seatbelt is structured to enable pulling out from a belt aperture portion provided at a pillar, a belt guide is provided at a seat back of the vehicle seat, and a belt path is corrected by the belt guide such that the shoulder belt is worn at a front side of the shoulder area of the occupant.

12 . The occupant restraint device for a vehicle according to claim 3 , wherein the belt backing airbag inflates and expands so as to extend in a seat width direction and restrains both shoulder areas of the occupant, together with which at least one of a height or a thickness at least at an end portion of the belt backing airbag at a side of the shoulder belt is increased more than at other portions of the belt backing airbag.

13 . The occupant restraint device for a vehicle according to claim 3 , wherein a shape in a front view of the belt backing airbag at completion of inflation and expansion is formed as at least one of a shape that covers the shoulder area of the occupant along the shoulder belt, a shape that covers both shoulder areas and a chest area of the occupant, or a shape that covers from the chest area to a head area of the occupant.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ohno Mitsuyoshi
• Shimazu Katsuya
• Furukawa Daiki
• Tanaka Kaname

Classifications

• B60R2021/022

  mounted on seats · CPC title

• B60R21/02

  Occupant safety arrangements or fittings {, e.g. crash pads (seat belts with crash pads B60R22/14; removable children's seats having a front guard or barrier B60N2/2839)} · CPC title

• B60R21/207

  in vehicle seats · CPC title

• B60R21/18 Primary

  the inflatable member formed as a belt or harness or combined with a belt or harness arrangement · CPC title

• B60R2022/1818

  Belt guides · CPC title