Air bag device

• US 20020089155A1
• Filed: 12/17/2001
• Published: 07/11/2002
• Est. Priority Date: 12/19/2000
• Status: Active Grant

• Current Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Original Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Inventors: Kuriyama, Yuji, Okada, Yasushi, Asaoka, Michihisa, Tajima, Koh
• Granted Patent: US 6,682,093 B2
• Time in Patent Office: Days
• US Class Current: 280/732
• CPC Class Codes: B60R 2021/161 characterised by additional means for controlling deployment trajectory
• CPC Class Codes: B60R 2021/2172 the cover being connected to the surrounding part and to the module, e.g. floating mounts
• CPC Class Codes: B60R 21/201 Packaging straps or envelopes for inflatable members
• CPC Class Codes: B60R 21/205 in dashboards
• 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

Abstract

In an air bag device, a folded air bag is accommodated in a condition that the air bag is enclosed by a sheet for preventing the air bag 11 unfolded. The sheet has a regulation wall portion which covers an upper surface of the air bag on the side from which the air bag projects at the time of expansion. The regulation wall portion is provided with a breakable portion which can be ruptured by being pressed by the air bag at the time of expansion of the air bag. Further, the breakable portion is provided so as to be ruptured from one edge side (left edge side) of the circumferential edge sides of the regulation wall portion to the right edge side through the vicinity of the center.

Claims

1. An air bag device having a folded air bag therein comprising:

a sheet for enclosing said air bag in a folded state and preventing said air bag unfolded;

a regulation wall portion provided on said sheet, covering a surface of said air bag provided on a side from which said air bag projects when said air bag is expanded; and

a breakable portion provided in said regulation wall portion for being ruptured when said regulation wall portion is pushed by said air bag when said air bag is expanded;

wherein said breakable portion is disposed so as to be ruptured from one predetermined circumferential edge side of said regulation wall portion.

2. An air bag device according to claim 1, wherein said breakable portion is disposed so as to be ruptured from one edge side of the left and right edge sides of said regulation wall portion mounted on a vehicle at the expansion of said air bag.

3. An air bag device according to claim 2, wherein said breakable portion is formed as a slit provided on said regulation wall portion, said slit being offset to said one edge side forming a rupture initiation side.

4. An air bag device according to claim 2, wherein folding of said air bag is completed when folded portions of said air bag extending in a left-right direction are folded and superimposed onto a center part of said air bag;

and wherein one of said left folded portion and said right folded portion, as a rupture initiation side in the regulation wall portion, is folded and superimposed on the other one of said left folded portion and said right folded portion.

5. An air bag device according to claim 2, wherein said sheet is provided with an auxiliary wall portion which is connected to said regulation wall portion and which covers a surface of said air bag on a side perpendicular to the side from which said air bag projects;

and wherein said auxiliary wall portion is connected to an edge side of said regulation wall portion in opposition to said rupture initiation side.

6. An air bag device according to claim 1, wherein said sheet is provided as a woven cloth with a lattice pattern, and said woven cloth is oriented so as to form a bias angle with respect to said breakable portion formed as a slit.