JP2004074867A - Air bag device for head protection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air bag device for head protection capable of securing mounting/fixing seat surfaces (space) and reducing man hour by reducing the number of points for mounting/fixing by integrally attaching an inflator and a guide member. <P>SOLUTION: In the air bag device for head protection, the inflator 4 which expands/develops an air bag body 3 in a curtain shape along the inner surface of the side part of a vehicle by supplying high pressure gas into the air bag body, and a jump bracket 5 which guides the expansion/development of the air bag body 3, are fixed to the vehicle body side in close vicinity to each other. The inflator 4 and the jump bracket 5 are integrally joined. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an airbag device for protecting a head mounted on a vehicle such as an automobile.
[0002]
[Prior art]
In a vehicle such as an automobile, as shown in FIG. 6, when an impact exceeding a predetermined load is applied to the side of the vehicle body at the time of a side collision or rollover of the vehicle, a roof side rail is provided inside the roof lining 100. The airbag body 101 folded and stored along the front seat 103 and the rear seat 104 is seated on the front seat 103 and the rear seat 104 by inflating and deploying downward in a curtain shape along the side inner surface of the vehicle body by the high-pressure gas generated by the inflator 102. It is well known that an airbag device A that restrains and protects an occupant's head is provided (see Japanese Patent No. 3089473).
[0003]
Further, in the airbag device as described above, a guide member referred to as a jump table or a jump bracket is disposed along a roof side rail of a vehicle body, for example, as guide means for guiding the inflation and deployment of the bag-shaped airbag body. It is also well known that the airbag body during inflation / deployment is guided so as not to enter the inside of the center pillar trim or to be caught on the upper end of the center pillar trim (Japanese Patent Laid-Open No. 11-91490, etc.). reference).
[0004]
[Problems to be solved by the invention]
However, since the inflator and the guide member such as the jump bracket described above are conventionally formed of completely different metal parts and are individually attached and fixed to the vehicle body side via a bracket or the like, both members are brought closer to the vehicle body side. When mounting and fixing, there is a problem that it is difficult to secure both mounting and fixing seat surfaces (spaces), the number of mounting and fixing points increases, and the number of steps increases.
[0005]
Therefore, an object of the present invention is to reduce the number of mounting / fixing points by integrally connecting the inflator and the guide member, thereby securing the mounting / fixing seat surface (space) and reducing man-hours. It is to provide a back device.
[0006]
[Means for Solving the Problems]
To achieve the above object, the invention according to claim 1 includes an inflator that supplies high-pressure gas to an airbag body to inflate and deploy the airbag body in a curtain shape along a side inner surface of a vehicle body; A guide member for guiding the inflation and deployment of the airbag body, and a head protection airbag device in which the guide member is fixed to the vehicle body side in close proximity to each other, the inflator and the guide member are integrally connected, Fixed points are reduced.
[0007]
The invention according to claim 2 is that the guide member is arranged along the roof side rail of the vehicle body and laid out on the indoor side from the upper end of the center pillar trim of the vehicle body so that the center pillar trim is deformed due to deformation of the center pillar at the time of a vehicle collision. The airbag body is prevented from obstructing the expansion and deployment.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an airbag device for protecting a head according to the present invention will be described in detail with reference to the drawings using embodiments.
[0009]
[Example]
FIG. 1 is a cross-sectional view of an airbag device for protecting a head showing one embodiment of the present invention, FIG. 2 is a front view of an inflator and a jump bracket, FIG. 3 is a side view of the same, and FIG. 5 is a cross-sectional view of a part of the airbag device for protecting the head different from that of FIG. 1.
[0010]
As shown in FIG. 1, a bag-shaped airbag body 3 is folded and stored inside a roof lining 1 of a vehicle body along a roof side rail 2 including a roof side rail inner 2a and a roof side rail outer 2b, When an acceleration sensor (not shown) detects an acceleration equal to or more than a predetermined value at the time of a side collision or rollover of the vehicle, the acceleration sensor (not shown) receives a signal from an inflator 4 disposed along the roof side rail 2 inside the roof lining 1. The supply of the high-pressure gas causes the airbag body 3 to push open the side edge of the roof lining 1 and expand and deploy in a curtain shape downward along the inner surface of the side of the vehicle body.
[0011]
At this time, the inflation / deployment of the airbag main body 3 is guided by a jump bracket (guide member) 5 disposed inside the roof lining 1 and below the inflator 4 and close to the inflator 4. . That is, in FIG. 1, the airbag body 3 is prevented from sneaking into the back side of the auxiliary roof lining 1a. In FIG. 1, 6 is a roof panel, 7 is a part of a weather strip that seals an edge of a door opening of a vehicle body, and 8a and 8b are reinforcements.
[0012]
In the center of the side of the vehicle body, as shown in FIG. 5, the jump bracket 5 has an upper surface of a center pillar trim 10 whose guide surface 5a decorates a center pillar 9 composed of a center pillar inner 9a and a center pillar outer 9b. It is laid out so that it is located on the indoor side of the part. That is, the leading end of the guide surface 5a protrudes from the upper end of the center pillar trim 10 into the room by the dimension C.
[0013]
As shown in FIGS. 2 to 4, the inflator 4 and the jump bracket 5 are connected to one end of a plate-like jump bracket 5 which is also long in the vehicle front-rear direction and the middle part of the tubular inflator 4 long in the vehicle front-rear direction. Are integrally connected via an auxiliary bracket 11 riveted to the fixed bracket portion 5b of the jump bracket 5.
[0014]
The upper and lower fixed bracket portions 5c and 5d provided at the intermediate portion of the jump bracket 5 are screwed to the roof side rail inner 2a (see FIG. 1), while the fixed bracket 12 attached to one end of the inflator 4 is provided. Are also screwed to the roof side rail inner 2a.
[0015]
As described above, in the present embodiment, the inflator 4 and the jump bracket 5 are integrally connected. When mounting and fixing them on the vehicle body side (body panel side), the fixing bracket portion on the jump bracket 5 side is used. Only three 5c, 5d and the fixed bracket 12 on the side of the inflator 4 are required, and the number of mounting and fixing points can be reduced as compared with the conventional case of at least four, securing the mounting and fixing seat surface (space) and reducing the man-hour. .
[0016]
In addition, by the integration, the strength of the mounting is improved, and particularly, the rigidity of the plate-shaped jump bracket 5 is also improved, so that the reliability at the time of a vehicle collision is further improved.
[0017]
Furthermore, in this embodiment, the jump bracket 5 is laid out at the side center of the vehicle body such that its guide surface 5a is located on the indoor side with respect to the upper end of the center pillar trim 10, so that it can be used in the event of a vehicle collision. It is possible to prevent the center pillar trim 10 from obstructing the expansion and deployment of the airbag body 3 due to the deformation of the center pillar 9 or the like. For example, even when the center pillar trim 10 is pushed up during a vehicle collision, the upper end stops against the lower surface of the jump bracket 5.
[0018]
Note that the present invention is not limited to the above embodiment, and it goes without saying that various changes such as a change in the shape of the jump bracket 5 are possible without departing from the spirit of the present invention. As another example, even in a case where the center pillar 9 and the center pillar trim 10 are deformed and enter the interior of the vehicle at the time of a side collision of the vehicle, the jump bracket 5 can reliably inflate and deploy the airbag body 3.
[0019]
【The invention's effect】
According to the first aspect of the present invention, as described above, the inflator supplies a high-pressure gas to the airbag body and inflates and deploys the airbag body in a curtain shape along the side inner surface of the vehicle body. In a head protecting airbag device in which a guide member for guiding the expansion and deployment of the main body is fixed to the vehicle body side in close proximity to each other, the inflator and the guide member are integrally connected. Can be reduced, securing the mounting and fixing seat surface (space) and reducing man-hours.
[0020]
According to the second aspect of the present invention, the guide member is disposed along the roof side rail of the vehicle body and is laid out on the indoor side from the upper end of the center pillar trim of the vehicle body. It is possible to prevent the center pillar trim from obstructing the expansion and deployment of the airbag body.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an airbag device for protecting a head, showing one embodiment of the present invention.
FIG. 2 is a front view of the inflator and a jump bracket.
FIG. 3 is a side view of the same.
FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;
FIG. 5 is a cross-sectional view of a portion of the airbag device for protecting the head different from that of FIG. 1;
FIG. 6 is a perspective view of the interior of the vehicle, showing a state in which the airbag body of the airbag device for protecting the head is deployed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Roof lining 2 Roof side rail 2a Roof side rail inner 3 Airbag main body 4 Inflator 5 Jump bracket 5a Guide surfaces 5b, 5c, 5d Fixed bracket 11 Auxiliary bracket 12 Fixed bracket

Claims (2)

An inflator for supplying high-pressure gas to the airbag body to inflate and deploy the airbag body in a curtain shape along the side inner surface of the vehicle body;
A guide member for guiding the expansion and deployment of the airbag body,
Are fixed to the vehicle body side in close proximity to each other,
An airbag device for protecting the head, wherein the inflator and the guide member are integrally connected. 2. The airbag device for protecting a head according to claim 1, wherein the guide member is disposed along a roof side rail of the vehicle body and is laid out indoors from an upper end of a center pillar trim of the vehicle body.

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