AIRBAG DEVICE

• US 20100295271A1
• Filed: 07/01/2008
• Published: 11/25/2010
• Est. Priority Date: 08/13/2007
• Status: Active Grant

• Current Assignee: Ashimori Industry Company Limited
• Original Assignee: Ashimori Industry Company Limited
• Inventors: Sasaki, Kou, Shimazaki, Yoshio
• Granted Patent: US 8,215,663 B2
• Time in Patent Office: Days
• US Class Current: 280/728.2
• CPC Class Codes: B60R 2021/21543 with emblems
• CPC Class Codes: B60R 2021/2375 Folding devices
• CPC Class Codes: B60R 21/201 Packaging straps or envelopes for inflatable members
• CPC Class Codes: B60R 21/2035 using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit steering wheel covers with tear lines B60R21/21656; assembling of modules B60R21/217
• CPC Class Codes: B60R 21/21656 Steering wheel covers or similar cup-shaped covers
• CPC Class Codes: B60R 21/2346 Soft diffusers
• CPC Class Codes: B60R 21/237 characterised by the way they are folded

Abstract

The operation efficiency is improved by enabling a gas rectifying member of an airbag device to be easily disposed in a folded airbag. An airbag in a folded state is accommodated around an inflator of an airbag device, and a gas rectifying member (12) for guiding gas is disposed between the airbag and the inflator surrounded by the airbag. The gas rectifying member (12) includes a retained portion (12A) retained, together with the airbag, around the inflator and a free-standing tubular gas-flow guide portion (12B) standing upright from the retained portion (12A), which are formed as a single part from a base fabric. The airbag is folded in a state in which the retained portion (12A) is retained inside the airbag. At this time, the gas-flow guide portion (12B) is less likely to be sandwiched between the airbag, because it is standing in the airbag.

Claims

1. An airbag device comprising:

an inflator;

an airbag having an attachment hole for the inflator, the airbag being accommodated in a folded state around the inflator;

a gas rectifying member that guides gas from the inflator, the gas rectifying member being disposed between the inflator and the accommodated airbag;

a cushion ring disposed near the attachment hole inside the airbag; and

a base plate for fixing the airbag, the base plate being disposed to oppose the cushion ring,

wherein the gas rectifying member includes a retained portion retained, together with the airbag, between the cushion ring and the base plate, and a free-standing tubular gas-flow guide portion standing upright from the retained portion, and

wherein the retained portion and the gas-flow guide portion are formed as a single part from a base fabric.

2. The airbag device according to claim 1,

wherein the retained portion of the gas rectifying member is provided at the center of the base fabric, and

wherein the tubular gas-flow guide portion of the gas rectifying member is formed by connecting side edges of radial cutout portions provided on the outside of the retained portion.

3. The airbag device according to claim 2,

wherein the side edges of the cutout portions are connected by sewing.

4. The airbag device according to claim 1,

wherein the gas rectifying member is formed such that the tubular gas-flow guide portion can expand to a larger size than the inner periphery of the airbag in a folded state.

5. The airbag device according to claim 1,

wherein the base fabric constituting the gas rectifying member is a silicone coated base fabric.

6. The airbag device according to claim 1,

wherein the gas rectifying member is formed such that the tubular gas-flow guide portion expands from one end at the retained portion toward the other end.

7. The airbag device according to claim 2,

wherein the gas rectifying member is formed such that the tubular gas-flow guide portion can expand to a larger size than the inner periphery of the airbag in a folded state.

8. The airbag device according to claim 3,

wherein the gas rectifying member is formed such that the tubular gas-flow guide portion can expand to a larger size than the inner periphery of the airbag in a folded state.

9. The airbag device according to claim 2,

wherein the base fabric constituting the gas rectifying member is a silicone coated base fabric.

10. The airbag device according to claim 3,

wherein the base fabric constituting the gas rectifying member is a silicone coated base fabric.

11. The airbag device according to claim 4,

wherein the base fabric constituting the gas rectifying member is a silicone coated base fabric.

12. The airbag device according to claim 2,

wherein the gas rectifying member is formed such that the tubular gas-flow guide portion expands from one end at the retained portion toward the other end.

13. The airbag device according to claim 3,

wherein the gas rectifying member is formed such that the tubular gas-flow guide portion expands from one end at the retained portion toward the other end.

14. The airbag device according to claim 4,

wherein the gas rectifying member is formed such that the tubular gas-flow guide portion expands from one end at the retained portion toward the other end.

15. The airbag device according to claim 5,

wherein the gas rectifying member is formed such that the tubular gas-flow guide portion expands from one end at the retained portion toward the other end.