Airbag device

• US 7,918,482 B2
• Filed: 09/12/2007
• Issued: 04/05/2011
• Est. Priority Date: 09/21/2006
• Status: Expired due to Fees

• Current Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Sugimoto, Shinichi, Sone, Takeshi
• Primary Examiner(s): Dickson; Paul N
• Assistant Examiner(s): Verley; Nicole
• Application Number:
  US12/308,645
• Publication Number:
  US 20100237596A1
• Time in Patent Office: 1,301 Days
• Field of Search: 280/729, 280/730, 280/743.1
• US Class Current: 280/729
• CPC Class Codes: B60R 2021/0018 Roll-over
• CPC Class Codes: B60R 2021/0048 Head
• CPC Class Codes: B60R 2021/23316 Inner seams, e.g. creating separate compartments or used as tethering means
• CPC Class Codes: B60R 2021/2612 Gas guiding means, e.g. ducts
• CPC Class Codes: B60R 21/207 in vehicle seats
• CPC Class Codes: B60R 21/233 comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other B60R21/232 takes precedence
• CPC Class Codes: B60R 21/26 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

Abstract

To provide a technique that is effective for allowing a pressurized fluid to pass through smoothly between a plurality of bag-like bodies when inflated and extend, and for improving their extendibility.

An airbag device includes a first bag 35 composed of a bag body formed by joining base fabrics 35A, 35B, and provided with a supply flow passage for supplying a pressurized fluid supplied from an inflator into the inside and a flow-out passage for allowing the pressurized fluid supplied into the inside to flow out to the outside, a second bag 36 composed of a bag body formed by joining base fabrics 36A, 36B, and provided with a flow-in passage for allowing the pressurized fluid allowed to flow out from the flow-out passage of the first bag 35 to flow into the inside, and a connection panel PN for connecting the first bag 35 and the second bag 36 so that the whole of the first bag 35 and the second bag 36 is configured in a predetermined shape when inflated and extends.

Claims

1. An airbag device comprising:

a first bag composed of a bag body formed by base fabrics joined together, and having a supply flow passage for receiving pressurized fluid supplied from an inflator into an inside thereof and a flow-out passage for ejecting the pressurized fluid supplied into the inside to flow outside;

a second bag composed of a bag body formed by base fabrics joined together, and having a flow-in passage for receiving the pressurized fluid ejected from the flow-out passage of the first bag to flow into an inside thereof; and

a connection member for connecting the first bag and the second bag, said connection member being formed of a flat sheet separate from the first and second bags and interposed between the first and second bags so that a whole of the first bag and the second bag is configured to have a predetermined shape when inflated and extended;

wherein the connection member has a lateral width substantially corresponding to those of the first and second bags, a length perpendicular to the lateral width, the length being less that the lateral width.

2. The airbag device according to claim 1, wherein the connection member connects a connection portion connected to one side of the first bag, and a connection portion connected to one side of the second bag when inflated and extended.

3. The airbag device according to claim 2, wherein the connection portion for the second bag is provided with a plurality of pairs, which is located at different positions in a vehicle width direction with each other, each of the pairs being positioned in left and right sides of a center line in the vehicle width direction.

4. The airbag device according to claim 3, wherein the connection member is composed of a fabric body.

5. The airbag device according to claim 4, wherein the connection member is composed of a non-inflatable fabric body.

6. The airbag device according to claim 1, wherein the first bag includes a pushing extension portion inflated and extending by the pressurized fluid supplied from the inflator, the pushing extension portion being provided with an extension deriving portion, and the second bag includes an upper extension portion, which is inflated and extends.

7. The airbag device according to claim 6, wherein the pushing extension portion of the first bag is inflated and extends, and the second bag is provided with a lower extension portion, which is inflated and extends to overlay the pushing extension portion.

8. The airbag device according to claim 1, wherein the supply flow passage is located at a lower end of the first bag, the flow-out passage comprises two exit passages arranged to sandwich the supply flow passage therebetween, and the flow-in passage is located at a lower end of the second bag and is connected to the two exit passages.

9. The airbag device according to claim 1, wherein the connection member further includes a plurality of joining portions at each lateral side thereof, and a recessed portion at a lower portion thereof.