FR2855124A1 - Inflatable security bag for use in vehicle, has tubular bag with opening at upper part for introducing tip of gas generator that is engaged in tube whose lower part presents communication orifice - Google Patents

Inflatable security bag for use in vehicle, has tubular bag with opening at upper part for introducing tip of gas generator that is engaged in tube whose lower part presents communication orifice Download PDF

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Publication number
FR2855124A1
FR2855124A1 FR0306127A FR0306127A FR2855124A1 FR 2855124 A1 FR2855124 A1 FR 2855124A1 FR 0306127 A FR0306127 A FR 0306127A FR 0306127 A FR0306127 A FR 0306127A FR 2855124 A1 FR2855124 A1 FR 2855124A1
Authority
FR
France
Prior art keywords
bag
opening
gas generator
tube
engaged
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR0306127A
Other languages
French (fr)
Other versions
FR2855124B1 (en
Inventor
Stephane Goujon
Jean Marc Obadia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aerosystems SAS
Original Assignee
Aerazur SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aerazur SAS filed Critical Aerazur SAS
Priority to FR0306127A priority Critical patent/FR2855124B1/en
Publication of FR2855124A1 publication Critical patent/FR2855124A1/en
Application granted granted Critical
Publication of FR2855124B1 publication Critical patent/FR2855124B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
    • B60R21/2171—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/261—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means other than bag structure to diffuse or guide inflation fluid
    • B60R2021/2612—Gas guiding means, e.g. ducts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Bags (AREA)

Abstract

The security bag has a tubular bag (1) including an opening (3) at an upper part for introducing a tip of a gas generator (5). The generator is engaged in a tube that includes a lower part presenting a communication orifice and is fixed to the upper part. The orifice is placed with respect to the opening of the bag. The tip of the generator is engaged in the tube and introduced in the bag to traverse the orifice and the opening.

Description

La présente invention concerne les sacs de sécuritéThe present invention relates to safety bags

gonflables équipant les véhicules automobiles. Elle concerne plus particulièrement le maintien en place du générateur assurant le gonflage d'un tel sac.  inflatable vehicles. It relates more particularly to the maintenance in place of the generator ensuring the inflation of such a bag.

Dans les systèmes conventionnels de sac de sécurité gonflable, la zone de liaison du générateur de gaz avec le sac, ou interface, est réalisée sous la forme d'une pièce de tissu cousue sur la paroi du sac et à travers laquelle est introduit le générateur. Cette interface est 10 généralement source de fuites et d'agressions thermiques du fait de la nature des matériaux mis en contact, c'està-dire de la projection de jets de gaz contre le tissu.  In conventional airbag systems, the connection zone of the gas generator with the bag, or interface, is in the form of a piece of fabric sewn on the wall of the bag and through which the generator is introduced. . This interface is generally source of leaks and thermal aggressions because of the nature of the materials in contact, that is to say the projection of gas jets against the fabric.

Ces inconvénients sont dus en particulier à l'absence de maintien du générateur de gaz qui, en raison des 15 contraintes exercées en fonctionnement, provoque une translation du générateur à l'intérieur du sac.  These disadvantages are due in particular to the lack of maintenance of the gas generator which, due to the stresses exerted in operation, causes a translation of the generator inside the bag.

La présente invention a pour objet de remédier aux inconvénients mentionnés ci-dessus des sacs de sécurité gonflables traditionnels, et elle propose à cet effet un 20 sac de sécurité gonflable équipé d'un dispositif de maintien du générateur de gaz qui, tout en étant d'un coût de fabrication réduit, améliore la résistance de l'interface ainsi que la localisation du générateur de gaz dans le sac.  The object of the present invention is to overcome the aforementioned drawbacks of conventional air bags, and for this purpose it proposes an airbag equipped with a device for holding the gas generator which, while being a reduced manufacturing cost, improves the resistance of the interface as well as the location of the gas generator in the bag.

A cet effet, le sac de sécurité gonflable selon l'invention est du type comprenant un sac tubulaire fermé à sa partie inférieure par une couture d'assemblage et comportant à sa partie supérieure une ouverture pour l'introduction de l'extrémité d'un générateur de gaz. Il 30 se caractérise en ce qu'il comprend un tube fermé à sa partie supérieure et dont la partie inférieure, présentant un orifice de communication, est fixée à la partie supérieure du sac de façon que le dit orifice de communication soit placé en regard de la dite ouverture du sac, l'extrémité du générateur étant engagée dans le dit 5 tube et introduite dans le sac à travers l'orifice de communication et la dite ouverture.  For this purpose, the inflatable safety bag according to the invention is of the type comprising a tubular bag closed at its lower part by an assembly seam and having at its upper part an opening for the introduction of the end of a gas generator. It is characterized in that it comprises a closed tube at its upper part and whose lower part, having a communication orifice, is fixed to the upper part of the bag so that said communication orifice is placed opposite said opening of the bag, the end of the generator being engaged in said tube and introduced into the bag through the communication port and said opening.

Le dit tube est avantageusement en tissu et est fermé à sa partie supérieure par une couture d'assemblage, et sa fixation au sac de sécurité gonflable est réalisée 10 par une couture de liaison entourant l'orifice de communication.  The said tube is advantageously made of fabric and is closed at its upper part by an assembly seam, and its attachment to the air bag is made by a connecting seam surrounding the communication port.

Cette structure de sac de sécurité gonflable selon l'invention est particulièrement adaptée pour les sacs latéraux ou sacs rideaux.  This inflatable safety bag structure according to the invention is particularly suitable for side bags or curtain bags.

On comprend qu'avec la disposition selon l'invention d'un tube de réception du générateur de gaz fixé au sac de sécurité gonflable et en communication avec l'intérieur de ce dernier, on obtient une uniformisation de la répartition des contraintes autour de l'orifice de passage 20 du générateur, ce qui permet d'accroître la résistance de l'ensemble et de réduire ainsi les risques de rupture du sac dans la zone d'interface.  It is understood that with the arrangement according to the invention of a receiving tube of the gas generator attached to the air bag and in communication with the interior of the latter, we obtain a uniform distribution of the constraints around the air. passage 20 of the generator, which increases the strength of the assembly and thus reduce the risk of rupture of the bag in the interface area.

La disposition selon la présente invention facilite le montage du générateur de gaz, en particulier s'il 25 s'agit d'un générateur coudé. Le montage est en effet simplifié et le positionnement du générateur est garanti par le centrage de son coude dans l'orifice.  The arrangement according to the present invention facilitates the mounting of the gas generator, particularly if it is a bent generator. The assembly is indeed simplified and the positioning of the generator is guaranteed by the centering of its elbow in the orifice.

On notera également que, selon l'invention, on obtient une réduction du coût de fabrication du sac. En 30 effet, comparé à un assemblage conventionnel dit " à plat ", on réalise en effet: - une réduction de la quantité des coutures, - une augmentation de l'étanchéité de la zone d'interface en raison de cette réduction de la quantité des coutures, une réduction de la quantité de tissu utilisée.  It will also be noted that, according to the invention, a reduction in the manufacturing cost of the bag is obtained. In fact, compared to a conventional assembly called "flat", in fact: - a reduction in the amount of seams, - an increase in the tightness of the interface area due to this reduction in the amount seams, a reduction in the amount of fabric used.

Pour bien faire comprendre l'invention on en décrira ci-après, à titre d'exemple sans caractère limitatif, une forme de réalisation préférée en référence au dessin schématique annexé dans lequel: la figure 1 est une vue en élévation d'un sac de sécurité gonflable équipé selon l'invention d'un dispositif de maintien en place du générateur de gaz; la figure 2 est une coupe verticale prise selon la ligne II-II de la figure 1; et la figure 3 est une vue à plat du dispositif de maintien des figures 1 et 2.  For a better understanding of the invention will be described below, by way of example without limitation, a preferred embodiment with reference to the attached schematic drawing in which: Figure 1 is an elevational view of a bag of inflatable safety device according to the invention of a holding device in place of the gas generator; Figure 2 is a vertical section taken along the line II-II of Figure 1; and Figure 3 is a plan view of the holding device of Figures 1 and 2.

En référence au dessin, on a représenté en 1 un sac de sécurité gonflable du type rideau, se présentant sous la forme d'un tube en tissu enduit, fermé à sa partie 20 inférieure par une couture d'assemblage 2.  Referring to the drawing, there is shown in 1 an inflatable curtain-type air bag, in the form of a coated fabric tube, closed at its lower part by an assembly seam 2.

A la partie supérieure du sac 1 est ménagé un trou 3 pour l'introduction, dans le sac 1, de l'extrémité coudée 4 d'un générateur de gaz 5. Pour son maintien, le générateur de gaz 5 est engagé dans un tube supérieur 6 25 constitué par une pièce de tissu fermée à sa partie supérieure par une couture d'assemblage 7.  At the upper part of the bag 1 is formed a hole 3 for introducing into the bag 1, the bent end 4 of a gas generator 5. For its maintenance, the gas generator 5 is engaged in a tube upper 6 25 constituted by a piece of fabric closed at its upper part by an assembly seam 7.

Un trou 8 ménagé à la partie inférieure du tube 6 vient en regard du trou 3 du sac de sécurité gonflable 1 et, dans cette position, le tube 6 est fixé au sac 1 par une couture de liaison circulaire 9.  A hole 8 formed in the lower part of the tube 6 comes opposite the hole 3 of the air bag 1 and, in this position, the tube 6 is fixed to the bag 1 by a circular connecting seam 9.

Par sa disposition dans le tube 6 qui est fixé par couture au sac 1, le générateur de gaz se trouve maintenu 5 en place contre toute translation, en répartissant ainsi de façon uniforme les contraintes autour du trou de passage du générateur ce qui permet d'accroître la résistance de l'ensemble et de réduire ainsi les risques de rupture du sac de sécurité gonflable dans la zone 10 d'interface.  By its arrangement in the tube 6 which is fixed by sewing to the bag 1, the gas generator is held in place against any translation, thereby uniformly distributing the stresses around the passage hole of the generator which allows increase the strength of the assembly and thus reduce the risk of rupture of the airbag in the interface zone.

On comprendra que la description ci-dessus a été  It will be understood that the above description has been

donnée à simple titre d'exemple, sans caractère limitatif, et que des adjonctions ou des modifications constructives pourraient y être apportées sans sortir du cadre de la 15 présente invention. On comprendra en particulier que, dans la forme de réalisation décrite, l'orifice percé dans le tube 6 a la forme d'un trou, mais qu'il pourrait avoir toute autre forme appropriée, par exemple une fente. Dans ce cas, la couture 9 reliant le tube 6 au sac 1 suivant le 20 contour de cette fente.  given merely by way of example, without limitation, and that additions or constructive modifications could be made without departing from the scope of the present invention. It will be understood in particular that, in the embodiment described, the orifice pierced in the tube 6 has the shape of a hole, but that it could have any other suitable form, for example a slot. In this case, the seam 9 connecting the tube 6 to the bag 1 along the contour of this slot.

Claims (6)

REVENDICATIONS 1. Sac de sécurité gonflable à dispositif de maintien du générateur de gaz, comprenant un sac tubulaire (1) fermé à sa partie inférieure par une couture 5 d'assemblage (2) et comportant à sa partie supérieure une ouverture (3) pour l'introduction de l'extrémité (4) d'un générateur de gaz (5), caractérisé par un tube (6) fermé à sa partie supérieure et dont la partie inférieure présentant un orifice de communication (8) est fixée à la 10 partie supérieure du sac (1) de façon que le dit orifice de communication (8) soit placé en regard de l'ouverture (3) du sac (1), l'extrémité (4) du générateur (5) étant engagée dans le dit tube (6) et introduite dans le sac (1) à travers l'orifice de communication (8) et l'ouverture 15 (3).  An inflatable bag with a device for holding the gas generator, comprising a tubular bag (1) closed at its lower part by an assembly seam (2) and having at its upper part an opening (3) for the introduction of the end (4) of a gas generator (5), characterized by a tube (6) closed at its upper part and whose lower part having a communication orifice (8) is fixed to the part upper bag (1) so that said communication port (8) is placed opposite the opening (3) of the bag (1), the end (4) of the generator (5) being engaged in the said tube (6) and introduced into the bag (1) through the communication orifice (8) and the opening (3). 2. Sac de sécurité gonflable selon la revendication 1, caractérisé en ce que le dit tube (6) est fixé au sac (1) par une couture de liaison (9) qui suit le contour de l'orifice de communication (8).  2. Inflatable bag according to claim 1, characterized in that said tube (6) is attached to the bag (1) by a connecting seam (9) which follows the contour of the communication port (8). 3. Sac de sécurité gonflable selon la revendication 1 ou la revendication 2, caractérisé en ce que le dit tube (6) est en tissu et est fermé à sa partie supérieure par une couture d'assemblage (7) .  Inflatable bag according to claim 1 or claim 2, characterized in that said tube (6) is of fabric and is closed at its upper part by an assembly seam (7). 4. Sac de sécurité gonflable selon l'une quelconque 25 des revendications précédentes, caractérisé en ce que le sac (1) est du type rideau.  4. Inflatable bag according to any one of the preceding claims, characterized in that the bag (1) is of the curtain type. 5. Sac de sécurité gonflable selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le dit orifice de communication (8) a la forme d'un trou.  5. Inflatable bag according to any one of claims 1 to 4, characterized in that said communication port (8) has the shape of a hole. 6. Sac de sécurité gonflable selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le dit orifice de communication (8) a la forme d'une fente. 15 20  Air bag according to one of claims 1 to 4, characterized in that said communication port (8) is in the form of a slot. 15 20
FR0306127A 2003-05-22 2003-05-22 INFLATABLE SAFETY BAG WITH HOLDING DEVICE FOR THE GAS GENERATOR Expired - Fee Related FR2855124B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0306127A FR2855124B1 (en) 2003-05-22 2003-05-22 INFLATABLE SAFETY BAG WITH HOLDING DEVICE FOR THE GAS GENERATOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0306127A FR2855124B1 (en) 2003-05-22 2003-05-22 INFLATABLE SAFETY BAG WITH HOLDING DEVICE FOR THE GAS GENERATOR

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FR2855124A1 true FR2855124A1 (en) 2004-11-26
FR2855124B1 FR2855124B1 (en) 2006-05-26

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FR0306127A Expired - Fee Related FR2855124B1 (en) 2003-05-22 2003-05-22 INFLATABLE SAFETY BAG WITH HOLDING DEVICE FOR THE GAS GENERATOR

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10604259B2 (en) 2016-01-20 2020-03-31 Amsafe, Inc. Occupant restraint systems having extending restraints, and associated systems and methods

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002051671A2 (en) * 2000-12-27 2002-07-04 Toyota Jidosha Kabushiki Kaisha Air bag apparatus
EP1228930A2 (en) * 2001-01-31 2002-08-07 Toyoda Gosei Co., Ltd. Head protection air bag system
WO2002079008A1 (en) * 2001-04-02 2002-10-10 Trw Occupant Restraint Systems Gmbh & Co. Kg Gas bag module for a vehicle occupant restraint system
US20020175508A1 (en) * 2001-05-24 2002-11-28 Hess Travis B. Counter flow inflator
WO2003010033A2 (en) * 2001-07-23 2003-02-06 Toyota Jidosha Kabushiki Kaisha Air bag system having diffuser structure
EP1310409A2 (en) * 2001-11-12 2003-05-14 Toyoda Gosei Co., Ltd. Head protecting airbag device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002051671A2 (en) * 2000-12-27 2002-07-04 Toyota Jidosha Kabushiki Kaisha Air bag apparatus
EP1228930A2 (en) * 2001-01-31 2002-08-07 Toyoda Gosei Co., Ltd. Head protection air bag system
WO2002079008A1 (en) * 2001-04-02 2002-10-10 Trw Occupant Restraint Systems Gmbh & Co. Kg Gas bag module for a vehicle occupant restraint system
US20020175508A1 (en) * 2001-05-24 2002-11-28 Hess Travis B. Counter flow inflator
WO2003010033A2 (en) * 2001-07-23 2003-02-06 Toyota Jidosha Kabushiki Kaisha Air bag system having diffuser structure
EP1310409A2 (en) * 2001-11-12 2003-05-14 Toyoda Gosei Co., Ltd. Head protecting airbag device

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Publication number Publication date
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Effective date: 20130131