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Inflator

An inflator, pressurized gas technology, applied in the direction of vehicle safety arrangement, pedestrian/occupant safety arrangement, transportation and packaging, etc., can solve the problem that the inflator is not suitable for use with very limited installation space, the overall size of the inflator is increased, etc. problems, resulting in improved productivity, reduced size and weight, and increased fixing strength

Active Publication Date: 2007-02-14
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, the overall size of the inflators increases, and thus these inflators are not suitable for use as side air bag inflators or curtain air bag inflators having a very limited installation space

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0049] figure 1 is the axial sectional view of the inflator, while Figure 2(a)~2(d) It is a view explaining how to attach stud bolts.

[0050] The inflator 10 includes a cylindrical shell 20 with both ends open, a first casing 30 attached to the open portion of one end of the cylindrical shell 20, and a first cover 30 attached to the open portion of the other end of the cylindrical shell 20. The second casing 40 .

[0051] Pressurized gas such as argon, helium or nitrogen used as an airbag inflation medium is filled into a sealed space (ie, a pressurized gas chamber) 22 surrounded by the cylindrical case 20 , the first case 30 and the second case 40 . The maximum pressure setting for filling pressure is approximately 70,000kPa

[0052] The cylindrical case 20 is made of steel or the like, and has a circumferential wall of constant thickness. The cross-section of the housing is not limited to a circle, but may be polygonal or elliptical.

[0053] The interior of the first...

no. 3 example

[0076] Figure 4 It is an axial cross-sectional view of the inflator (inflator 100 ), and is also used as an explanatory view of an airbag attachment method.

[0077] The cylindrical case 112 has an opening 114 at one end thereof, and is closed at the other end thereof. An inert gas such as argon, helium, nitrogen, etc. is filled into the closed space (ie, the pressurized gas chamber) at a maximum pressure of about 70,000 kPa. With respect to the axial direction, the cylindrical housing 112 has a circular cross section, and the opening portion 114 has a similar circular cross section.

[0078] The studs 151 , 152 are fixed to the circumferential wall (of constant thickness) of the cylindrical housing 112 using resistance welding. The studs 151 , 152 are arranged on the same line along the axial direction of the inflator 100 and extend in a direction perpendicular to the axial direction.

[0079] In order to increase the welding strength, the circumferential walls of the stu...

no. 4 example

[0095] Figure 5 is a side view of the aerator configured with brackets, Image 6 is a magnified view of the bracket, while Figure 7(a) ~ 7(c) It is a schematic view showing the fixing process of fixing the bracket to the stud. It should be pointed out that in Figure 5 In ~7, the same reference numerals represent figure 1 Or the same elements and structures as the inflator shown in Figure 2, so their introduction is omitted.

[0096] exist Figure 5 Among them, two studs 51, 52 are sequentially formed on the side (that is, the peripheral surface) of the inflator housing 20 in the axial direction, while the other two studs 54, 56 are formed on the side of the housing opposite to the two studs 51. , 52 are set in the circumferential order. In other words, in the inflator of this embodiment, the two studs (( 51 , 54 ) or ( 52 , 56 )) that are lined up in the circumferential direction on the side of the case are arranged at on the two positions above. This type of aerato...

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Abstract

Stud bolts 51, 52 are fixed by welding to the side faces of a first closure 30 and a second closure 40, which are connected to a cylindrical housing 20. When connecting a gas introduction port of the air bag to a diffuser portion 43, the stud bolts 51, 52 do not cause an obstruction, and hence the attachability of an inflator 10 to a module case using the stud bolts 51, 52 is not impaired.

Description

technical field [0001] The invention relates to an inflator for an automobile airbag system. Background technique [0002] Depending on the type and structure of the inflator, different attachment methods are used to attach the inflator of the automotive airbag system to the vehicle body. In the case of a front passenger's side inflator including an elongated housing, the inflator is fitted in a formwork, and thus the inflator is fixed to the formwork with stud bolts provided on the end face of the housing. [0003] However, some side airbag inflators and curtain airbag inflators for side collisions are attached to an airbag by directly connecting a vent hole of the inflator to a gas introduction port of the airbag. In the case of this type of inflator, if the studs are provided on the end faces, the studs interfere with the airbag, and thus it becomes very difficult to attach the inflator to the airbag. As a solution to such a problem, JP-B No. 2528596 and JP-B No. 313326...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R21/20B60R21/26B60R21/217B60R21/272
Inventor 德田政和中安雅之胜田信行
Owner DAICEL CHEM IND LTD
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