Roof airbag apparatus

Patent metadata

Field	Value
Publication number	US-11325559-B2
Application number	US-202017090705-A
Country	US
Kind code	B2
Filing date	Nov 5, 2020
Priority date	Nov 7, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A roof airbag apparatus may include: a first-row deployment part deployed from the front to the rear of a roof so as to cover a front area, when gas is supplied from a gas supply part; a second-row deployment part coupled to a front end of the first-row deployment part so as to communicate with the first-row deployment part, and configured to cover a rear area which is deployed to the rear when the first-row deployment part is deployed; and an auxiliary deployment part coupled to a top or bottom surface of the first-row deployment part so as to communicate with the first-row deployment part, and configured to increase/decrease the top-to-bottom thickness of the first-row deployment part, when deployed.

First claim

What is claimed is:

1. A roof airbag apparatus comprising:
a first-row deployment part configured to deploy from a front to a rear of a roof and cover a front area of the roof when gas is supplied from a gas supply part;
a second-row deployment part coupled to the first-row deployment part and configured to deploy toward the rear of the roof and cover a rear area of the roof when the first-row deployment part is deployed; and
an auxiliary deployment part coupled to a top or bottom surface of the first-row deployment part so as to communicate with the first-row deployment part, and configured to increase a top-to-bottom thickness of a portion of the roof airbag covering the front area of the roof when deployed.

2. The roof airbag apparatus of claim 1 , wherein the auxiliary deployment part is folded to communicate with a left or right end of the first-row deployment part, and coupled to the top or bottom surface of the first-row deployment part.

3. The roof airbag apparatus of claim 1 , wherein the auxiliary deployment part comprises:
a first chamber having a first connection end formed on one side thereof and a first sewed end formed on the opposite side of the one side, wherein the first connection end is coupled to the left end of the first-row deployment part so as to communicate with the first-row deployment part, and the first sewed end is coupled to the top or bottom of the first-row deployment part; and
a second chamber having a second connection end formed on one side thereof and a second sewed end formed on the opposite side of the one side, wherein the second connection end is coupled to the right end of the first-row deployment part so as to communicate with the first-row deployment part, and the second sewed end is coupled to the top or bottom of the first-row deployment part.

4. The roof airbag apparatus of claim 3 , wherein the first and second sewed ends are sewed to abut on each other at the top or bottom of the first-row deployment part.

5. The roof airbag apparatus of claim 4 , wherein the first and second sewed ends are sewed to abut on each other at the center position of the first-row deployment part in a side-to-side direction, while having a length in a front-to-rear direction.

6. The roof airbag apparatus of claim 3 , wherein the first-row deployment part has a first filling space formed therein, the first filling space being filled with gas supplied from the gas supply part,
the second-row deployment part has a second filling space formed therein, the second filling space communicating with the first filling space in a front-to-rear direction, and
each of the first and second chambers has an auxiliary filling space formed therein, the auxiliary filling space communicating with the first filling space in a lateral direction.

7. The roof airbag apparatus of claim 6 , wherein the auxiliary filling space of the first chamber communicates with the first filling space through one or more first paths in the lateral direction, and
the auxiliary filling space of the second chamber communicates with the first filling space through one or more second paths in the lateral direction.

8. The roof airbag apparatus of claim 7 , wherein the plurality of first paths are formed in the front-to-rear direction so as to be spaced apart from each other, and the plurality of second paths are formed in the front-to-rear direction so as to be spaced apart from each other.

9. The roof airbag apparatus of claim 6 , wherein the auxiliary filling space is horizontally divided into a plurality of spaces by one or more seam parts, such that the plurality of spaces communicate with one another.

10. The roof airbag apparatus of claim 9 , wherein the seam parts have a length in a side-to-side direction, are disposed in the front-to-rear direction of the auxiliary space so as to be spaced apart from each other, and divide the auxiliary filling space in the front-to-rear direction.

11. The roof airbag apparatus of claim 10 , wherein a connection flow path is formed on a left and right of the seam part so as to extend in the front-to-rear direction, and
the connection flow path connects the auxiliary filling spaces, divided by the seam parts, to each other.

12. The roof airbag apparatus of claim 1 , wherein the roof has a pair of tether guides formed on a left and right sides thereof, and having a length in the front-to-rear direction, and
both ends of the first-row deployment part and both ends of the second-row deployment part in the side-to-side direction are coupled to the respective tether guides so as to slide in the front-to-rear direction along the tether guides.

Assignees

• Hyundai Mobis Co Ltd

Inventors

• Min Byung Ho
• Lee Dong Oh

Classifications

• B60R2021/0253

  mounted on roof · CPC title

• B60R2021/2648

  comprising a plurality of combustion chambers or sub-chambers · CPC title

• B60R21/237

  characterised by the way they are folded · CPC title

• B60R21/213 Primary

  in vehicle roof frames or pillars · CPC title

• B60R21/2338

  Tethers · CPC title