Gas generator and assembling method thereof
First Claim
Patent Images
1. A gas generator, comprising:
- a housing provided with a gas discharge port;
an igniter assembly and a gas generating agent accommodated in the housing, the igniter assembly including an igniter main body which includes an ignition portion and an electro-conductive pin, being integrated with a metallic collar by a resin;
the metallic collar having,a fixing portion provided at a lower portion of the igniter assembly and including an insertion portion inserted into a hole in a bottom surface of the housing, andthe resin having,a guide portion provided at an upper portion of the igniter assembly above the fixing portion and being axially in connection with the fixing portion;
a metallic cylindrical member having an inner circumferential wall surface fitted to an outer circumferential wall surface of the fixing portion, the metallic cylindrical member covering the igniter assembly and defining a charging chamber for charging the gas generating agent, a portion of the metallic cylindrical member having an inner diameter corresponding to outer diameters of the fixing portion and the guide portion,the metallic cylindrical member and the metallic collar satisfying,D1=D5, where D1 is an outer diameter of the fixing portion and D5 is an outer diameter of the guide portion, andD1=D5≧
R1, where R1 is an inner diameter of the metallic cylindrical member; and
the metallic cylindrical member being fixed in a state in which an inner circumferential wall surface of the metallic cylindrical member and an outer circumferential wall surface of the fixing portion are press-fitted, and the inner circumferential wall surface of the metallic cylindrical member and an outer circumferential wall surface of the guide portion are abutted against each other.
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Abstract
The present invention provides a gas generator, including:
- a housing with a gas discharge port;
- an igniter assembly and a gas generating agent in the housing; and
- a metallic cup of constant inner diameter covering the igniter to define a charging chamber. The igniter assembly includes a main body, including an ignition portion and a electro-conductive pin integrated with a metallic collar by a resin. The metallic collar has a fixing portion inserted into a hole in a bottom surface of the housing and a remaining portion projecting inward from the bottom surface of the housing, and a guide portion. An inner circumferential wall surface of the metallic cup and an outer circumferential wall surface of the fixing portion are press-fitted, and an annular gap is formed between the inner circumferential wall of the metallic cup member and an outer circumferential wall surface of the guide portion.
26 Citations
3 Claims
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1. A gas generator, comprising:
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a housing provided with a gas discharge port; an igniter assembly and a gas generating agent accommodated in the housing, the igniter assembly including an igniter main body which includes an ignition portion and an electro-conductive pin, being integrated with a metallic collar by a resin; the metallic collar having, a fixing portion provided at a lower portion of the igniter assembly and including an insertion portion inserted into a hole in a bottom surface of the housing, and the resin having, a guide portion provided at an upper portion of the igniter assembly above the fixing portion and being axially in connection with the fixing portion; a metallic cylindrical member having an inner circumferential wall surface fitted to an outer circumferential wall surface of the fixing portion, the metallic cylindrical member covering the igniter assembly and defining a charging chamber for charging the gas generating agent, a portion of the metallic cylindrical member having an inner diameter corresponding to outer diameters of the fixing portion and the guide portion, the metallic cylindrical member and the metallic collar satisfying, D1=D5, where D1 is an outer diameter of the fixing portion and D5 is an outer diameter of the guide portion, and D1=D5≧
R1, where R1 is an inner diameter of the metallic cylindrical member; andthe metallic cylindrical member being fixed in a state in which an inner circumferential wall surface of the metallic cylindrical member and an outer circumferential wall surface of the fixing portion are press-fitted, and the inner circumferential wall surface of the metallic cylindrical member and an outer circumferential wall surface of the guide portion are abutted against each other. - View Dependent Claims (2, 3)
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Specification