Gas generator and method for manufacturing the same

Abstract

A gas generator that eliminates work for welding-fixing a holder to a housing and subjecting the holder to an excess processing, which can be easily manufactured at low cost, and a method for manufacturing the gas generator. The gas generator includes an approximately short cylindrical housing including a bottomed member and a lid member, gas generants arranged in the housing to generate a high-temperature gas by combustion, a filter arranged in an inner circumference part of the housing so as to surround the gas generants in a diameter direction of the housing, an igniter energized from the outside to ignite, and a holder to which the igniter is fixed and that is fixed to the bottomed member so that the igniter is arranged coaxially with the housing. At least one of the holder and the bottomed member is clamped, and pressed and deformed in an axial direction of a hole so that the holder is fixed to the bottomed member.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional of U.S. application Ser. No. 11 / 814,438 filed Jul. 20, 2007, the entire contents of which is incorporated herein by reference. Application Ser. No. 11 / 814,438 is a National Stage of PCT / JP06 / 300808 filed Jan. 20, 2006 and claims the benefit of priority under 35 U.S.C. §119 from Japanese Application No. 2005-014433 filed Jan. 21, 2005.TECHNICAL FIELD[0002]The present invention relates to a gas generator for inflating and deploying an airbag of an automobile, etc., more particularly, it relates to a gas generator to which an igniter can be fixed simply and at low cost.BACKGROUND ART[0003]A gas generator for immediately deploying an airbag has been conventionally built in various airbag modules in order to protect an occupant from an impact caused by an automobile crash. The gas generator immediately generates a large amount of high-temperature gas based on a crash detection signal transmitted from a crash se...

AI Technical Summary

Benefits of technology

The present invention provides a gas generator that can be easily manufactured at low cost and has high airtightness and fixing strength between the holder and the bottomed member. The gas generator includes a holder for fixing an igniter, and a housing with a bottomed member that can contain gas generants therein. The holder is fitted into the hole in the bottomed member, and at least one of the holder and the bottomed member is deformed in a diameter direction of the hole. This eliminates the need for welding-fixing the holder to the bottomed member and subjecting it to excess processing. The gas generator can be manufactured at a lower cost and with higher efficiency than conventional methods.

Problems solved by technology

However, the holder is required to be cut into a shape suitable for fixing an igniter in a process such as caulking, and the iron-based material is relatively expensive to cut.

In the Patent Document 2, a relatively complicated work is required that a sealing plate composed of a steel material is fixed in a pipe body composed of a steel material by caulking, and that a surface of the sealing plate is subjected to striking so that struck indentations are left along a circumferential edge of the sealing plate.

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