Gas generator for air bag

• US 20070001439A1
• Filed: 06/15/2006
• Published: 01/04/2007
• Est. Priority Date: 06/16/2005
• Status: Abandoned Application

• Current Assignee: Daicel Chemical Industries Limited (Daicel Corporation)
• Original Assignee: Daicel Chemical Industries Limited (Daicel Corporation)
• Inventors: Matsuda, Naoki, Sakuma, Kosuke, Yabuta, Mikio
• Application Number:
  US11/453,101
• Publication Number:
  US 20070001439A1
• Time in Patent Office: Days
• US Class Current: 280/741
• CPC Class Codes: B60R 2021/2648 comprising a plurality of combustion chambers or sub-chambers
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder
• CPC Class Codes: F42B 3/04 for producing gas under pressure generators of inflation fluid especially adapted for vehicle air bags B60R21/26
• CPC Class Codes: F42B 3/195 Manufacture

Abstract

The present invention relates to a gas generator for an air bag, comprising, in a housing having a gas discharge port, a combustion chamber, and the combustion chamber accommodating a gas generating agent that generates gas by combustion and an ignition device for igniting and combusting the gas generating agent, the ignition device being formed by integrating an electric igniter and a substantially cylindrical igniter collar with a resin in a state where the electric igniter is disposed inside the igniter collar, the ignition device being in contact with the bottom surface of the housing in at least part of the surface of the igniter collar and being attached on the housing bottom surface by at least one from the following attachment structures (1) to (3): (1) The igniter collar is fixed by a support member having a flat section and a tubular section extending upward from the flat section, the flat section is fixed to the housing bottom surface, and the upper end surface of the igniter collar is pressed and fixed by the open portion of the tubular section; (2) The igniter collar is fixed by caulking the lower end section thereof to the outer surface of the housing bottom surface; (3) Part of the surface of the igniter collar that is in contact with the housing bottom surface has an annular groove, and a fixing material is charged into the interior of the annular groove.

Claims

1. A gas generator for an air bag, comprising, a housing having a gas discharge port, a combustion chamber, included in the housing, and a gas generating agent that generates gas by combustion and an ignition device for igniting and combusting the gas generating agent, accommodated in the combustion chamber,

the ignition device being formed by integrating an electric igniter and a substantially cylindrical igniter collar with a resin in a state where the electric igniter is disposed inside the igniter collar,

the ignition device being in contact with the bottom surface of the housing in at least part of the surface of the igniter collar and being attached on the housing bottom surface by at least one from the following attachment structures (1) to (3)

(1) The igniter collar is fixed by a support member having a flat section and a tubular section extending upward from the flat section, the flat section is fixed to the housing bottom surface, and the upper end surface of the igniter collar is pressed and fixed by the open portion of the tubular section;

(2) The igniter collar is fixed by caulking the lower end section thereof to the outer surface of the housing bottom surface;

(3) Part of the surface of the igniter collar that is in contact with the housing bottom surface has an annular groove, and a fixing material is charged into the interior of the annular groove.