Airbag device

• US 7,878,533 B2
• Filed: 05/09/2006
• Issued: 02/01/2011
• Est. Priority Date: 07/07/2005
• Status: Active Grant

• Current Assignee: Ashimori Industry Company Limited
• Original Assignee: Ashimori Industry Company Limited
• Inventors: Sasaki, Kou, Shimazaki, Yoshio, Taniyama, Hiroyuki, Kamura, Seiichiro
• Primary Examiner(s): Ilan; Ruth
• Application Number:
  US11/994,656
• Publication Number:
  US 20090079167A1
• Time in Patent Office: 1,729 Days
• Field of Search: 280/728.1, 280/731, 280/740, 280/742
• US Class Current: 280/731
• CPC Class Codes: B60R 21/203 in steering wheels or steering columns
• CPC Class Codes: B60R 21/2176 the air bag components being completely enclosed in a soft or semi-rigid housing or cover
• CPC Class Codes: B60R 21/231 characterised by their shape, construction or spatial configuration
• CPC Class Codes: B60R 21/237 characterised by the way they are folded

Abstract

There is provided an airbag device for allowing a holding member to firmly hold an outer circumference part and a peripheral edge part of an airbag during the airbag assembling work and to reduce the assembling work time. The airbag device comprising a holding member (14) for holding an airbag (10) in a state as folded and contained therein, and pressing down a side face of the airbag (10) on the outer circumference thereof. The holding member (14) is made of a woven cloth, and an anticipated rupture part (14k) to be ruptured by a gas generated from an inflator (30) is formed at the position corresponding to the part of the airbag (10), inflating in the initial stage of the expansion thereof.

Claims

1. An airbag device comprising an inflator, an airbag communicating with the inflator for undergoing inflation by a gas generated from the inflator, a holding member for holding the airbag in a state as folded and contained therein, and pressing down a side face of the airbag on the outer circumference thereof, to thereby restrain inflation and expansion of the airbag in the direction of the side face thereof caused by the gas generated from the inflator at least in the initial stage of the expansion of the airbag, and a gas rectification member for rectifying and guiding the gas generated from the inflator up to the vicinity of a part of the airbag inflating in the initial stage of the expansion thereof,

wherein the holding member is made of a woven cloth and an anticipated rupture part to be ruptured by the gas generated from the inflator is formed at the position corresponding to the part of the airbag, inflating in the initial stage of the expansion thereof,

wherein the holding member has a hole for a fixture member at substantially the center thereof, and

wherein the size of the anticipated rupture part of the holding member is larger than a diameter of a decorative member provided at substantially the central part of the airbag device.

2. The airbag device according to claim 1, wherein the part of the airbag inflating in the initial stage of the expansion thereof undergoes inflation and expansion by the gas guided by the gas rectification member.

3. The airbag device according to claim 1, wherein the anticipated rupture part is formed by perforations.

4. The airbag device according to claim 3, wherein rupture stop parts are formed on tip ends of the anticipated rupture part.

5. The airbag device according to claim 4, wherein the anticipated rupture part is formed radially from the center of the woven cloth.

6. The airbag device according to claim 5, wherein rupture stop parts are formed on a circumference of a concentric circle from the center of the woven cloth.