Airbag and airbag apparatus

• US 20060232049A1
• Filed: 04/04/2006
• Published: 10/19/2006
• Est. Priority Date: 04/15/2005
• Status: Abandoned Application

• Current Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Takata Corporation (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Abe, Kazuhiro
• Application Number:
  US11/396,680
• Publication Number:
  US 20060232049A1
• Time in Patent Office: Days
• US Class Current: 280/729
• 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

Abstract

An airbag is formed by an airbag main body including a front panel disposed at a vehicle occupant side, and a rear panel disposed at a side opposite to the vehicle occupant side, combined at peripheral edge portions thereof. An inner panel partitions an interior of the airbag main body into a first chamber having an opening provided in the rear panel for facilitating inflation of the airbag, and a second chamber surrounding the first chamber. The inner panel is disposed such that a volume V1 of the first chamber is less than a volume V2 of the second chamber when the airbag main body is brought to completion of development by introduction of a fluid from an inflator. The device protects a vehicle occupant by expanding and developing both the first chamber and the second chamber in a well-balanced manner.

Claims

1. An airbag comprising:

an airbag main body including a front panel disposed at a vehicle occupant side, and a rear panel disposed at a side opposite to the vehicle occupant side, combined at peripheral edge portions thereof; and

an inner panel partitioning an interior of the airbag main body into a first chamber having an opening provided in the rear panel for facilitating inflation of the airbag, and a second chamber surrounding the first chamber, the inner panel being disposed such that in an inflated state of the airbag main body, a volume V1 of the first chamber is less than a volume V2 of the second chamber.

2. The airbag according to claim 1, wherein the inner panel is disposed such that the volume V1 of the first chamber is less than the volume V2 of the second chamber when a time from not less than 20 msec to not more than 40 msec has passed as completion of inflation of the airbag main body.

3. The airbag according to claim 1, wherein the inner panel is disposed so as to satisfy a condition of 0.03<

V1/V2<

0.3.

4. The airbag according to claim 3, wherein the inner panel is disposed so as to satisfy a condition of 0.05<

V1/V2<

0.25.

5. The airbag according to claim 1, wherein the inner panel includes a plurality of openings for fluid communication between the first chamber and the second chamber.

6. The airbag according to claim 5, wherein the inner panel includes a first member attached to the front panel and a second member attached to the rear panel, said first and second members being connected together at peripheries thereof.

7. The airbag according to claim 6, wherein the second member includes a second center portion, and a plurality of second strap portions extending outwardly from the second center portion and connected to the first member so that a space between the strap portions form the opening.

8. The airbag according to claim 7, wherein the first member includes a first center portion, and a plurality of first strap portions extending outwardly from the first center portion and connected to the second strap portions.

9. The airbag according to claim 1, further comprising a guide member situated inside the inner panel for covering the opening, said guide member having a plurality of gas discharge outlets for guiding gas to the first chamber.

10. An airbag apparatus comprising:

an inflator for discharging a pressurized inflation fluid; and

an airbag according to claim 1 for receiving the inflation fluid.

11. The airbag apparatus according to claim 6, wherein the opening provided in the rear panel for facilitating inflation of the airbag houses the inflator.