JP2008126842A - Inflator bag device for seat cushion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the output of an inflator by providing an inflator bag having a small volume. <P>SOLUTION: An inflator bag device 1 is arranged on a side surface of a seat cushion 12 on the side adjacent to a door D of an automobile. A guide member 4 for guiding a high-pressure gas jetted out of an inflator 3 extends to an inflator bag 2 prior to the deployment of the inflator bag 2 so that the inflator bag 2 is moved upwardly to the abutting position on a waist Ph of an occupant P. As a result, the guide member extends to move the inflator bag upwardly to the abutting position on the waist of the occupant prior to the deployment of the inflator bag, and the volume of the inflator bag can be reduced. Further, any inflator of high output is unnecessary. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an inflator bag device for a seat cushion having a waist restraint function that restrains an occupant by restraining it to a seat at the time of a collision, in particular, a collision from the side of a vehicle (hereinafter abbreviated as a side collision). is there.

  During a side collision, the occupant tries to move in the side collision direction due to inertia. At that time, when the occupant wears a seat belt, the movement of the occupant in the side collision direction is suppressed to some extent by the restraining action of the shoulder belt and the waist belt.

In recent years, in order to further suppress the movement of the occupant in the side collision direction, when the vehicle suddenly accelerates due to a side collision, the gap between the vehicle side wall portion (body side portion) is instantaneously eliminated. An inflator bag device that restricts movement of the occupant in the direction of the vehicle side wall has been proposed (for example, Patent Document 1).
European Patent Application Publication No. 728629

  The inflator bag device shown in Patent Document 1 is installed inside the seat cushion on the side close to the door. When the vehicle suddenly accelerates due to a side collision, the inflator bag device breaks through a part of the seat cushion and deploys. The movement of the occupant in the vehicle side direction is restricted.

  However, since the inflator bag device proposed in Patent Document 1 is deployed at the original installation position, a large-capacity inflator bag is required. In order to prevent an increase in deployment time, a higher-power inflator is required.

  The problem to be solved by the present invention is that the conventional inflator bag device requires a large-capacity inflator bag and a higher-power inflator is necessary to prevent an increase in deployment time.

Inflator bag device for seat cushion of the present invention,
An inflator bag device disposed on a side surface of a seat cushion adjacent to a vehicle side wall,
A guide member for guiding the high pressure gas ejected from the inflator to the inflator bag,
The main feature is that the inflator bag is stretched prior to the deployment of the inflator bag and is moved upward to a position where the inflator bag abuts on the waist of the occupant.

  In the present invention, a term including “up” or “up” expresses a portion or direction located in the direction of the ceiling of the vehicle relative to a certain part as a term including “up” or “up”. ing.

  In the present invention, at the time of sudden acceleration of the vehicle due to a side collision, the inflator bag is unfolded after the guide member first extends and moves the inflator bag upward to a position where it contacts the occupant's waist. The volume is small. Therefore, a high output inflator is not required.

In the inflator bag device for seat cushion of the present invention,
The upper height position of the inflator bag of the inflator bag device arranged on the seat cushion,
When the seat cushion is mounted on the vehicle floor and above the upper height of the seat frame and below the upper height of the seat cushion, it does not interfere with getting on and off, and the guide member prior to deployment of the inflator bag The stretching amount can be shortened.

In the inflator bag device for seat cushion of the present invention,
When the guide member is extended in the upward direction, at least part of the guide member is bent and extended toward the vehicle side wall with respect to a vertical line passing through the axial center line of the inflator. Further, the guide member can be more reliably extended upward prior to the development of the inflator bag.

  In the present invention, prior to the deployment of the inflator bag, the inflator bag is moved upward to a position where the guide member extends and contacts the occupant's waist, so that the volume of the inflator bag can be reduced. Also, a high output inflator is not required.

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.
FIG. 1 is a view of a schematic configuration when the inflator bag device for a seat cushion according to the present invention is installed in a seat cushion device of an automobile, and FIG. 2 is an enlarged view of a main part when FIG. 1 is viewed from the door side of the automobile. FIG. 3 is a view of FIG. 1 viewed from the front side of the automobile. 4 is a perspective view before deployment of the inflator bag device of the present invention, FIG. 5 is a view similar to FIG. 4 after deployment, and FIG. 6 is an exploded perspective view of the inflator bag device of the present invention.

  In the following description, “front”, “rear”, or a term including the same is a term including “front” or “front” in a portion or direction located in the traveling direction of the vehicle relative to a certain part. A portion or direction located on the opposite side of the traveling direction of the vehicle relative to the part is expressed as a term including “rear” or “rear”. In addition, the term “inside” or a term including the same represents a portion or direction located at the center in the width direction of the vehicle.

  1 to 6, reference numeral 1 denotes an inflator bag device for a seat cushion according to the present invention, which is installed, for example, on a side adjacent to a door D of a seat cushion 12 constituting a seat cushion device 11 on a driver's seat side of an automobile. . In practice, a decorative cover is provided to surround the inflator bag device 1, but is omitted here for ease of explanation.

  The seat cushion device 11 includes the seat cushion 12, the seat back 13 attached to the back of the seating surface of the seat cushion 12 so as to be reclining, and the slide adjuster 14 that slides the seat cushion 13 in the front-rear direction. The seat frame 15 is fixed to the seat frame 15. Reference numeral 14 a denotes a lever operated to operate the slide adjuster 14.

  Of these, the seat frame 15 includes, for example, a side frame member 15a, a front frame member 15b, and a rear frame member 15c. The side frame member 15a is divided into an upper frame member 15aa and a lower frame member 15ab. Has been. The upper frame member 15aa can move up and down and in the front-rear direction together with the seat cushion 12 by a structure (not shown).

  In this example, the inflator bag device 1 for seat cushion according to the present invention is attached to the upper frame member 15aa with bolts and nuts via the attachment member 5, and the inflator bag device 1 together with the seat cushion 12 in the vertical and longitudinal directions. It can be moved.

  With such a configuration, the inflator bag device 1 is always located at a position that matches the riding posture of the occupant P even if the seat cushion 12 is moved in the vertical and longitudinal directions. At the time of deployment, as shown in FIG. 3, the waist part Ph of the passenger P can be effectively restrained.

  By the way, the inflator bag device 1 of the present invention includes, for example, a metal inflator bag 2, an inflator 3 that supplies high-pressure gas to the inflator bag 2 when the automobile suddenly accelerates due to a side collision, and high-pressure gas that is ejected from the inflator 3. Is provided with a metal guide member 4 that guides the air to the inflator bag 2.

  Then, the packing 7 is assembled in the inflator bag 2, and the bellows part 4a of the guide member 4 is inserted into the distribution jet part of the inflator case 6 in which the inflator 3 is press-fitted and the fixed piece 6a is bent and fixed. The bellows part 4a is fixed to the inflator case 6 by brazing or the like in advance.

  Thereafter, the pipe portion 4 b of the guide member 4 is fixed to the inflator bag 2 using the clamp 8 and the nut 9, and the tip portion of the pipe portion 4 b and the inflator bag 2 are connected via the packing 7. At this time, the inflator bag 2 is inserted and arranged in a slightly press-fitted state in the folded portion 5 a of the mounting member 5, and the inflator case 6 is fixed to the mounting member 5 with a nut 10.

  In the present invention having such a configuration, when the high pressure gas is supplied from the inflator 3, the high pressure gas is distributed to the two guide members 4 via the inflator case 6, for example. When the high-pressure gas supplied to the guide member 4 exceeds a certain pressure, the inflator bag 2 is extended to a position where the guide member 4 is stretched prior to deployment of the folded inflator bag 2 and abuts against the waist portion Ph of the occupant P. Move up.

  By adopting such a configuration, the inflator bag 2 can be downsized, and the high-power inflator 3 is not required.

  In this example, as shown in FIG. 2, the inflator bag 2 before deployment is attached so that the upper height position is substantially the same as the upper height of the seat frame 15 (upper frame member 15aa). Although no particular embodiment is shown, the upper height position of the inflator bag 2 before deployment is approximately equal to or higher than the upper height of the seat frame 15 and is substantially equal to the upper height of the seat cushion 12. If it is made below, it does not interfere with getting on and off, and the extension amount of the guide member 4 prior to deployment of the inflator bag 2 can be shortened.

  Further, when the guide member 4 is extended upward, the inflator case 6 side of the guide member 4 is bent toward the door D side with respect to the vertical line passing through the axial center line of the inflator 3 as shown in FIG. In the case where the guide member 4 is stretched, the guide member 4 can be stretched more reliably before the inflator bag 2 is unfolded.

  Thereafter, the high-pressure gas is supplied into the folded inflator bag 2, and when the pressure exceeds a certain level, the inflator bag 2 is inflated and deployed from both sides in the front-rear direction toward the inside as shown in FIG.

  As a result, the inflator bag 2 is in a deployed state as shown in FIG. 5 and effectively restrains the waist portion Ph of the occupant P.

  It goes without saying that the embodiment of the present invention may be changed as appropriate within the scope of the technical idea described in the claims.

  For example, the inflator bag 2 may not be made of metal, but may be made by folding fabric. Further, if the guide member 4 is stretched prior to the deployment of the inflator bag 2 and can move the inflator bag 2 up to a position where the inflator bag 2 comes into contact with the waist Ph of the inflator P, even if it is not a metal bellows, A bellows made of fabric, resin, rubber or the like may be used.

  Although the inflator bag apparatus which employ | adopted the structure of this invention demonstrated what was installed in a motor vehicle in the above example, you may provide in vehicles, such as an aircraft and a ship other than a vehicle.

It is the figure which looked at schematic structure at the time of installing the inflator bag apparatus for seat cushions of this invention in the seat cushion apparatus of a motor vehicle from upper direction. It is the principal part enlarged view which looked at FIG. 1 from the door side of the motor vehicle. It is the figure which looked at FIG. 1 from the front side of the motor vehicle. It is a perspective view before expansion | deployment of the inflator bag apparatus for seat cushions of this invention. It is a figure similar to FIG. 4 after expansion | deployment. It is a disassembled perspective view of the inflator bag apparatus for seat cushions of this invention.

Explanation of symbols

1 inflator bag device 2 inflator bag 3 inflator 4 guide member 11 seat cushion device 12 seat cushion 15 seat frame P occupant Ph waist

Claims (3)

An inflator bag device disposed on a side surface of a seat cushion adjacent to a vehicle side wall,
A guide member for guiding the high pressure gas ejected from the inflator to the inflator bag,
An inflator bag device for a seat cushion, wherein the inflator bag device is configured to be stretched prior to deployment of the inflator bag and to move the inflator bag upward to a position where the inflator bag contacts the waist. The upper height position of the inflator bag of the inflator bag device arranged in the seat cushion is:
2. The inflator for a seat cushion according to claim 1, wherein the seat cushion inflator has a height equal to or higher than an upper height of a seat frame for attaching the seat cushion to a vehicle floor surface and equal to or lower than a height equal to the upper height of the seat cushion. Bag device. The guide member is
2. At the time of extending in the upward direction, at least a part of the guide member is bent and extended toward a vehicle side wall with respect to a vertical line passing through an axial center line of the inflator. Or the inflator bag apparatus for seat cushions of 2.

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