Airbag

Patent metadata

Field	Value
Publication number	US-10899309-B2
Application number	US-201816234698-A
Country	US
Kind code	B2
Filing date	Dec 28, 2018
Priority date	Jan 12, 2018
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

An airbag is formed by joining outer edges of an occupant-side wall and a vehicle-side wall each of which is made of a base cloth having flexibility. The occupant-side wall and vehicle-side wall are equal in circumferential length of the outer edge. The occupant-side wall includes a recessed region for receiving a head of a vehicle occupant and an annular raised region that surrounds the recessed region. At least one of the occupant-side wall and the vehicle-side wall includes at least one shortening region that reduces a circumferential length of an outer edge of the base cloth.

First claim

What is claimed is:

1. An airbag adapted to be mounted on a vehicle, comprising:
an outer shell that is formed by joining outer circumferential edges of an occupant-side wall and a vehicle-side wall each made of a base cloth having flexibility, the occupant-side wall and the vehicle-side wall being equal in circumferential length of the outer circumferential edge, wherein the vehicle-side wall includes an opening that is disposed in a vicinity of a center of the vehicle-side wall for receiving an inflation gas, and a mounting region that is disposed in a periphery of the opening to be mounted on the vehicle;
a recessed region that is disposed in a vicinity of a center of the occupant-side wall as inflated adapted to receive a head of a vehicle occupant;
a raised region that is raised in an annular shape in a circumference of the recessed region in the occupant-side wall as inflated;
a plurality of tethers that limit a clearance between the occupant-side wall and the vehicle-side wall, the tethers connecting a circumference of the mounting region in the vehicle-side wall and the occupant-side wall, thus forming a bottom plane of the recessed region in the occupant-side wall as inflated; and
shortening regions, each shortening region of the shortening regions is disposed in at least one of the occupant-side wall and the vehicle-side wall, the each shortening region reducing the circumferential length of the outer circumferential edge of the base cloth of the at least one of the occupant-side wall and the vehicle-side wall, wherein
the vehicle-side wall includes a first plurality of the shortening regions in the outer circumferential edge of the vehicle-side wall,
the occupant-side wall includes a second plurality of the shortening regions in the outer circumferential edge of the occupant-side wall, the shortening regions in the occupant-side wall are disposed around the recessed region,
the base cloth of each of the occupant-side wall and the vehicle-side wall includes a plurality of V-shaped cut-out regions, each of the cut-out regions includes a bottom and a pair of opposing edges that extend from the bottom to the outer circumferential edge of the base cloth,
the each shortening region is formed by joining the opposing edges of a respective one of the cut-out regions, and
a joint of each of the tethers to the occupant-side wall is disposed proximate to the bottom of the cut-out region in the each of the shortening regions.

2. The airbag of claim 1 , wherein
the base cloth of the vehicle-side wall includes a generally square central region in which the mounting region is disposed and four outer peripheral regions, the central region includes four sides, each of the outer peripheral regions extends from each of the four sides of the central region in a generally rectangular shape, and the cut-out regions of the vehicle-side wall are disposed between respective adjoining edges of the outer peripheral regions of the vehicle-side wall;
the base cloth of the occupant-side wall includes a generally square central region and four outer peripheral regions, the central region includes four sides, each of the four outer peripheral regions extends from each of the four sides of the central region in a generally trapezoidal shape expanding outwardly, and the cut-out regions of the occupant-side wall are disposed between respective adjoining edges of the outer peripheral regions of the occupant-side wall.

Assignees

• Toyoda Gosei Kk
• Honda Motor Co Ltd

Inventors

• Hotta Masashi
• Kawamura Koji
• Arima Tetsuhiro

Classifications

• B60R2021/23308

  the individual compartments defining the external shape of the bag · 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

• B60R2021/23382

  Internal tether means · CPC title

• B60R21/2338 Primary

  Tethers · CPC title

• B60R21/203

  in steering wheels or steering columns · CPC title