JP2008273290A - Piping protective structure of airbag system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a piping protective structure of an airbag system capable of protecting an inner surface of a pipe from broken pieces or foreign matters mixed in high-pressure gas to be discharged from an inflator when the airbag is inflated when a vehicle is collided. <P>SOLUTION: Reference numeral 1 denotes an inflator having an impact detection sensor 2, an ignition device 3, a gas generator 4 or the like. Reference numeral 5 denotes an airbag to be instantaneously inflated by the discharge of a high-pressure gas (of the pressure of about 10 MPa). A gas discharge port 6 of the inflator 1 and a gas flow-in port 7 of the airbag 5 are connected to each other via a pipe 8 such as a curved rubber hose and a resin-made hose. A filter 10 for removing broken pieces and foreign matters mixed in the high-pressure gas Q is provided inside a mouthpiece 9 provided at the gas discharge port 6 of the inflator 1. The filter 10 is arranged in the direction orthogonal to the flowing direction S of the high-pressure gas Q, and fixed by a calking member 11 or bonding (welding or brazing). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a piping protection structure for an air bag system, and more particularly, to remove debris and foreign matters mixed in high-pressure gas discharged from an inflator and to protect the inner surface of the piping such as a rubber hose, etc. Concerning structure.

  2. Description of the Related Art Conventionally, an airbag system mounted on an automobile or the like has an inflator equipped with an impact detection sensor, an ignition device, a gas generator, etc., and an airbag that is instantly inflated by discharging high pressure gas (about 10 MPa) or the like. Is formed. Such an airbag system is often incorporated in the handle of a driver's seat of a vehicle, a dashboard, a rear seat, or the like (see, for example, Patent Document 1).

  However, in recent years, an airbag system has been proposed in which an inflator and an airbag are separated and connected together by piping such as a rubber hose. However, the piping for this connection is not necessarily straight, and it may be curved to avoid parts, etc., and flexible materials such as rubber hoses may be used to absorb vibrations and vibrations. May be used.

When such a curved flexible rubber hose is used as piping, when high-pressure gas (about 2 atm) discharged from the inflator flows through the rubber hose, debris or foreign matter mixed in the high-pressure gas is removed from the inner surface of the rubber hose. The rubber hose may swell or break.
JP 2005-255082 A

  The present invention pays attention to such conventional problems, and is designed to protect the inner surface of the pipe from debris and foreign matters mixed in the high-pressure gas discharged from the inflator when the airbag is inflated at the time of a vehicle collision or the like. An object of the present invention is to provide a protection structure for piping of a bag system.

  In order to achieve the above object, the present invention is a protective structure for piping connecting an inflator and an air bag, and a filter that removes debris and foreign matters mixed in high-pressure gas from the base of high-pressure gas discharged from the inflator The gist of this is to provide.

  Here, the filter is disposed in a direction orthogonal to the direction in which the high-pressure gas flows, and is fixed by a caulking member or adhesion, and the filter is one selected from stainless steel, iron wire, and resin material. Is to use.

  In this way, a filter that removes debris and foreign matter mixed in the high pressure gas is installed inside the base of the high pressure gas discharged from the inflator, so that the inner surface of the piping such as the rubber hose is protected, and the rubber hose is prevented from swelling or breaking. It can be prevented beforehand.

  This invention is a protective structure for piping connecting an inflator and an air bag as described above, and a filter for removing debris and foreign matters mixed in the high pressure gas is provided inside the base of the high pressure gas discharged from the inflator. Therefore, when the airbag inflates, such as when a vehicle collides, it protects the curved outer inner surface of the piping from debris and foreign matter mixed in the high-pressure gas discharged from the inflator, and the rubber hose swells or breaks. There is an effect that can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 is a schematic configuration diagram of an airbag system embodying the present invention, FIG. 2 is an enlarged sectional view of a portion X in FIG. 1, and 1 includes an impact detection sensor 2, an ignition device 3, a gas generator 4, and the like. An inflator 5 indicates an airbag that swells instantaneously when high pressure gas (about 10 MPa) or the like is discharged. The gas outlet 6 of the inflator 1 and the gas inlet 7 of the airbag 5 are a curved rubber hose or resin hose. Etc., and is connected via a pipe 8.

  Inside the base 9 provided at the gas discharge port 6 of the inflator 1, a filter 10 for removing debris and foreign matters mixed in the high-pressure gas Q is provided. The filter 10 is disposed in a direction orthogonal to the direction S in which the high-pressure gas Q flows, and is fixed by a caulking member 11 or adhesion (welding or brazing).

  The filter 10 uses one selected from stainless steel, iron wire, and resin material, and specifically uses a punched metal or a stitched one. Furthermore, it is possible to protect the inner wall surface of the curved rubber hose by providing an inner surface protective material on the outer inner wall surface of the curved portion 8a of the pipe 8.

  Internal protective materials include natural fibers such as hemp and cotton, resin fibers such as PET and PA, metal tubes such as bellows tubes and spiral tubes such as stainless steel, non-metal tubes such as ceramic tubes, and resin tubes such as PET and PA. A cylindrical shape formed using one selected from the above is used.

  As described above, in the present invention, the filter 10 for removing debris and foreign matters mixed in the high-pressure gas Q is provided in the base 9 of the high-pressure gas Q discharged from the inflator 1, so that air can be used when a vehicle collides. When the bag 5 is inflated, debris and foreign matter mixed in the high-pressure gas Q discharged from the inflator 1 can be removed by the filter 10, and as a result, the curved outer inner surface of the pipe 8 is protected and piping such as a rubber hose is provided. It is possible to prevent the inner wall surface of 8 from swelling or breaking.

  Furthermore, by installing an inner surface protective material 12 in at least a portion of the pipe 8 where the high pressure gas Q discharged from the inflator 1 abuts, even if debris or foreign matter mixed in the high pressure gas Q passes through the filter 10. It is also possible to protect the fragments and foreign matters with the inner surface protective material 12, and it is possible to prevent the inner wall surface of the pipe 8 such as a rubber hose from expanding or breaking.

It is a schematic block diagram of the airbag system which implemented this invention. It is an expanded sectional view of the X section of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inflator 2 Impact detection sensor 3 Ignition apparatus 4 Gas generator 5 Air bag 6 Gas discharge port 7 Gas inflow port 8 Piping 8a Bending part 9 Base 10 Filter 11 Clamping member 12 Inner surface protection material Q High pressure gas

Claims (3)

It is a protective structure for piping connecting an inflator and an airbag,
A protective structure for piping of an airbag system, wherein a filter for removing debris and foreign matters mixed in high-pressure gas is provided inside a base of high-pressure gas discharged from the inflator.   The said filter is arrange | positioned in the direction orthogonal to the direction through which a high pressure gas flows, The protection structure of piping of the airbag system of Claim 1 fixed by the crimping member or adhesion | attachment.   The piping structure of an airbag system according to claim 1 or 2, wherein the filter uses one selected from stainless steel, iron wire, and resin material.

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