Airbag, airbag assembly and airbag device

• US 7,226,077 B2
• Filed: 06/23/2004
• Issued: 06/05/2007
• Est. Priority Date: 09/09/2003
• Status: Active Grant

• Current Assignee: Joyson Safety Systems Japan GK (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Abe, Kazuhiro
• Primary Examiner(s): Dickson; Paul N.
• Assistant Examiner(s): WILHELM, TIMOTHY
• Application Number:
  US10/873,213
• Publication Number:
  US 20050052009A1
• Time in Patent Office: 1,077 Days
• Field of Search: 280/730.1, 280/743.1, 280/736, 280/742, 280/728.1
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/23169 specially adapted for knee protection
• CPC Class Codes: B60R 2021/23382 Internal tether means
• CPC Class Codes: B60R 2021/23576 Sewing
• CPC Class Codes: B60R 21/205 in dashboards
• CPC Class Codes: B60R 21/206 in the lower part of dashboards, e.g. for protecting the knees
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence
• CPC Class Codes: B60R 21/2338 Tethers
• CPC Class Codes: B60R 21/235 characterised by their material

Abstract

An airbag includes an airbag body, and a support sheet attached to the airbag body. Each of the airbag body and the support sheet has a gas-generator insertion hole. The insertion holes are disposed separately, wherein the support sheet faces the insertion hole of the airbag body and the airbag body faces the insertion hole of the support sheet. A space between the insertion holes of the airbag body and the support sheet serves as a gas-generator insertion space.

Claims

1. An airbag comprising:

an airbag body having a first insertion hole for a gas generator, and

a support sheet attached to the airbag body and having a second insertion hole for the gas generator, said support sheet facing the first insertion hole and the second insertion hole facing the airbag body so that a space is formed between the first insertion hole and the second insertion hole for accommodating a gas-generator, wherein the first insertion hole and the second insertion hole are configured in a manner wherein the gas generator, which is disposed in the space, is supported to be sealed in the space so that a trailing end of the gas generator projects out of the air bag body and is configured to be connected to a connector at a location outside the airbag body.

2. An airbag according to claim 1, further comprising a connecting portion for connecting the airbag body and the support sheet, said connecting portion surrounding the space and extending between the first and second insertion holes so that the gas generator is sealingly retained by the connecting portion.

3. An airbag according to claim 2, wherein said connecting portion includes parallel seams to form said space therebetween.

4. An airbag assembly comprising the airbag according to claim 1, and a rod-shaped gas generator passing through the first and second insertion holes and having a distal end arranged inside the airbag and a rear end arranged outside the airbag.

5. An airbag assembly according to claim 4, wherein said airbag is a knee airbag.

6. An airbag device comprising the airbag according to claim 1, a gas generator attached to the airbag for providing gas to the airbag, and a retainer for holding the airbag and gas generator.

7. An airbag according to claim 1, wherein said first and second insertion holes are located at a portion away from a center area of the airbag so that the gas generator is located at the center area.

8. An airbag according to claim 7, wherein the portions of the airbag body and the support sheet which form the space between the first insertion hole and the second insertion hole, are configured to be hermetically fixed to a side peripheral portion of the gas generator.

9. An airbag assembly according to claim 4, wherein the first and second insertion holes are located at a portion away from a center area of the airbag so that the gas generator is located at the center area, and portions of the airbag body and the support sheet which form the space between the first insertion hole and the second insertion hole, are configured to be hermetically fixed to a side peripheral portion of the gas generator.

10. An airbag assembly according to claim 9, wherein the gas generator is disposed in a fixing member having stud bolts which each pass through sets of overlapping holes formed in the air bag body and the support sheet, for connection to a retainer configure to hold the airbag in a predetermined operative position.

11. An airbag assembly according to claim 10, wherein the fixing member is fully enclosed in the airbag body.