Air bag device

• US 6,682,093 B2
• Filed: 12/17/2001
• Issued: 01/27/2004
• Est. Priority Date: 12/19/2000
• Status: Expired due to Fees

• Current Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Original Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Inventors: Okada, Yasushi, Asaoka, Michihisa, Tajima, Koh, Kuriyama, Yuji
• Primary Examiner(s): Dickson, Paul N.
• Assistant Examiner(s): Spisich, George D.
• Application Number:
  US10/015,638
• Publication Number:
  US 20020089155A1
• Time in Patent Office: 771 Days
• Field of Search: 280/728.1, 280/728.2, 280/728.3, 280/730.1, 280/732
• 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 for preventing said air bag from unfolding when in a non-deployed state;

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

a breakable portion being offset to one of a left edge side and a right edge side of said regulation wall portion so as to be ruptured by said air bag beginning from said one of a left edge side and a right edge side of said regulation wall portion when said air bag is expanded 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

one of a left folded portion and said a right folded portion is folded and superimposed on another of said left folded portion and said right folded portion on a rupture initiation side in said regulation wall portion.

2. An air bag device according to claim 1, wherein said breakable portion is formed as a slit provided on said regulation wall portion, said slit forming a rupture initiation side.

3. 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 a side from which said air bag projects; and

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

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

a sheet for enclosing said air bag in a folded state and for preventing said air bag from unfolding when in a non-deployed state;

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

a breakable portion being offset to one of a left edge side and a right edge side of said regulation wall portion so as to be ruptured by said air bag beginning from said one of a left edge side and a right edge side of said regulation wall portion when said air bag is expanded, wherein;

said breakable portion is formed as a slit provided on said regulation wall portion, said slit forming a rupture initiation side; and

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.