Ignitor assembly

A technology of igniters and components, applied in the direction of weapon accessories, vehicle parts, chemical instruments and methods, etc., to achieve the effect of preventing moisture absorption or deterioration

Active Publication Date: 2006-04-26
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the airbag gas generator needs to operate reliably for not less than 10 years, that is, during the service life of the vehicle
Therefore, reliable operation will not be obtained if the igniter, flame enhancer and gas generant absorb moisture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] according to figure 1 , an embodiment of the igniter assembly will be described. figure 1 is an axial (longitudinal) cross-sectional view of the igniter assembly.

[0063] The igniter assembly 1 includes an igniter 10 and a substantially cylindrical metal collar 20 for supporting the igniter 10 from the outside, a resin 30 is filled between the igniter 10 and the metal collar 20, and the igniter 10 and metal collar 20 are combined together.

[0064] The igniter 10 comprises an ignition part 12 provided with an ignition charge and two conductive pins 13, 14 forming a circuit supplying the current required to ignite and burn the ignition charge.

[0065] The ferrule 20 includes: a collar body portion 22 having a maximum outer diameter, a cylindrical protrusion 24 extending axially upward from the collar body portion 22 , an annular protrusion extending radially inward from the collar body portion 22 26 , and a skirt 28 extending axially downward from the collar body po...

Embodiment 2

[0083] according to image 3 , another embodiment of the igniter assembly will be described. image 3 is an axial (vertical) sectional view of the igniter assembly. image 3 The igniter assembly shown is 1 with the figure 1 The difference of the illustrated igniter assembly 1 is only that an annular inclined surface 25 is provided instead of the cylindrical step 25, and image 3 The igniter assembly shown is 1 with the figure 1 The igniter assembly in the function in the same way.

[0084] During the curing process, due to the shrinkage of the resin, the figure 2 When a gap is generated at the shown interface 50, the interface between the annular inclined surface 25 and the resin 30 (corresponding to figure 2 The interface of the interface 51) is pressed by the shrinking resin. Thus, even in the case where a gap is generated at the interface 50 due to shrinkage of the resin, the gap is prevented from being formed at the interface 51 . And thus achieve the first effect...

Embodiment 3

[0088] Below, will explain figure 1 and image 3 Other embodiments of igniter assemblies are shown. exist figure 1 and image 3 In the igniter assembly shown in , by providing the metal collar 20 with such strength that it is slightly deformed when subjected to the injection pressure of the resin injection molding method, and by adjusting the injection conditions of the resin, it is possible to achieve the above-mentioned first effect igniter assembly. The following will be based on figure 1 described as follows.

[0089] exist figure 1 , including a cylindrical protrusion 24 (which includes a cylindrical step portion 25) extending axially upward from the collar main body 22 and an annular protrusion 26 (which includes a ring shaped portion) extending radially inward from the collar main body 22. The metal collar 20 of the stepped portion 27 ) is made of aluminum or an aluminum alloy, and is slightly deformed due to an injection pressure of not less than 9 MPa applied a...

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PUM

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Abstract

An igniter assembly having excellent moisture proof is provided. <??>A cylindrical protruding portion 24 and a cylindrical stepped portion 25 are arranged in the metal collar 20. Shrinkage of a resin 30 after injection-molding produces a gap in an interface 50 but, to the contrary, in an interface 51, it presses the cylindrical stepped portion 25 and does not produce a gap. Thereby, since production of a continuous gap is prevented, entry of moisture is prevented. <IMAGE>

Description

technical field [0001] The invention relates to an igniter assembly applicable to an air bag gas generator and a manufacturing method thereof. Background technique [0002] The air bag gas generator is applied to an air bag system installed in a vehicle to ensure the safety of passengers, and an igniter assembly for igniting and burning a gas generating agent at the time of activation is installed therein. [0003] The igniter assembly includes an igniter with igniting powder and a metal collar to hold the igniter, and the igniter and the metal collar are bonded by resin filled between the igniter and the metal collar by injection molding together. [0004] The resin immediately after injection molding is in a molten state, but a gap may be generated at the interface between the metal collar and the resin due to shrinkage during curing over time. When the gap is thus created, there is a possibility that moisture intrudes from the external environment and causes the ignitio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42B3/12B01J7/00B60R21/26B60R21/264F41G1/38F42B3/107F42B3/195
CPCF42B3/195B60R2021/26029F42B3/103F42B3/107
Inventor 原田博小田慎吾加藤万滥木之下元
Owner DAICEL CHEM IND LTD
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