Vehicle curtain airbag device

Patent metadata

Field	Value
Publication number	US-2018099634-A1
Application number	US-201715710090-A
Country	US
Kind code	A1
Filing date	Sep 20, 2017
Priority date	Oct 7, 2016
Publication date	Apr 12, 2018
Grant date	—

Abstract

There is provided a vehicle curtain airbag device including: an inflator; a curtain airbag; a rear seat side impact chamber; a front chamber; and a protective cloth that is configured separately from the curtain airbag, is anchored to at least an upper edge side of the curtain airbag, is disposed ranging from a vehicle width direction inner surface of a front portion of the rear seat side impact chamber to a vehicle width direction inner surface of a rear portion of the front chamber, in the completely deployed state of the curtain airbag, and covers, from a vehicle width direction inner side, a recess portion that has different heights in a bag thickness direction and that is formed between the front portion of the rear seat side impact chamber and the rear portion of the front chamber.

First claim

What is claimed is:

1 . A vehicle curtain airbag device comprising:
an inflator that is activated to discharge a gas not only at a time of a side impact but also at a time of a frontal impact, the frontal impact including at least a small overlap impact and an oblique impact; a curtain airbag which, when the gas from the inflator is supplied thereto, becomes inflated and deployed in a shape of a curtain in a vehicle downward direction from a vehicle width direction outer end portion of a vehicle ceiling; a rear seat side impact chamber that configures part of the curtain airbag and is disposed on a vehicle width direction outer side of a head of an occupant who is seated in a rear seat and wearing a three-point seat belt device; a front chamber that configures part of the curtain airbag, is disposed on a vehicle front side of the rear seat side impact chamber with a non-inflating portion being interposed in between, and whose thickness measured inward in the vehicle width direction from the non-inflating portion, in a completely deployed state of the curtain airbag, is thinner than a thickness of the rear seat side impact chamber measured inward in the vehicle width direction from the non-inflating portion; and a protective cloth that is configured separately from the curtain airbag, is anchored to at least an upper edge side of the curtain airbag, is disposed ranging from a vehicle width direction inner surface of a front portion of the rear seat side impact chamber to a vehicle width direction inner surface of a rear portion of the front chamber, in the completely deployed state of the curtain airbag, and covers, from a vehicle width direction inner side, a recess portion that has different heights in a bag thickness direction and that is formed between the front portion of the rear seat side impact chamber and the rear portion of the front chamber.

2 . The vehicle curtain airbag device according to claim 1 , wherein the protective cloth is a cloth whose out-of-plane stiffness is higher than that of a base cloth configuring the curtain airbag.

3 . The vehicle curtain airbag device according to claim 1 , wherein a coefficient of friction of the vehicle width direction outer surface of the protective cloth is set lower than a coefficient of friction of the vehicle width direction inner surface of the rear seat side impact chamber.

4 . The vehicle curtain airbag device according to claim 1 , wherein the protective cloth is anchored to a lower edge side in addition to the upper edge side of the curtain airbag.

5 . The vehicle curtain airbag device according to claim 1 , wherein the protective cloth is partially disposed in an up and down direction central region of the curtain airbag with which the head of the occupant seated in the rear seat comes into abutting contact.

6 . The vehicle curtain airbag device according to claim 5 , wherein
one end portion of a first strap is connected or joined to an upper edge side of the protective cloth and another end portion of the first strap is anchored to an upper edge portion of the curtain airbag, and one end portion of a second strap is connected or joined to a lower edge side of the protective cloth and another end portion of the second strap is anchored to a lower edge portion of the curtain airbag.

7 . The vehicle curtain airbag device according to claim 6 , wherein positions at which the first strap and the second strap are anchored to the curtain airbag are disposed offset in the vehicle rearward direction with respect to positions at which the first strap and the second strap are connected or joined to the protective cloth.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ohno Mitsuyoshi
• Toida Koji
• Nezaki Takuya
• Ohashi Junji
• Hayashi Yusuke

Classifications

• B60R21/232 Primary

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

• B60R2021/0048

  Head · CPC title

• B60R2021/23153

  specially adapted for rear seat passengers · CPC title

• B60R2021/0009

  Oblique collision · CPC title

• B60R21/26

  characterised by the inflation fluid source or means to control inflation fluid flow {(arrangement or mounting thereof to the vehicle B60R21/20; blasting cartridges for producing gas under pressure in general F42B3/04; initiators or igniters therefor F42B3/10)} · CPC title