FR2824029A1 - Inflatable airbag with progressive and directed deployment consists of assembly of upper and lower partially concertinaed panels, folds of upper panel held in place by fusible connections which rupture progressively on inflation - Google Patents

Inflatable airbag with progressive and directed deployment consists of assembly of upper and lower partially concertinaed panels, folds of upper panel held in place by fusible connections which rupture progressively on inflation Download PDF

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Publication number
FR2824029A1
FR2824029A1 FR0105670A FR0105670A FR2824029A1 FR 2824029 A1 FR2824029 A1 FR 2824029A1 FR 0105670 A FR0105670 A FR 0105670A FR 0105670 A FR0105670 A FR 0105670A FR 2824029 A1 FR2824029 A1 FR 2824029A1
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FR
France
Prior art keywords
bag
assembly
upper panel
folds
place
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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
FR0105670A
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French (fr)
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FR2824029B1 (en
Inventor
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.)
Industrielle Et Commerciale De Materie Fr Ste
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Aerazur SAS
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Publication date
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Priority to FR0105670A priority Critical patent/FR2824029B1/en
Publication of FR2824029A1 publication Critical patent/FR2824029A1/en
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Publication of FR2824029B1 publication Critical patent/FR2824029B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23Inflatable members
    • B60R21/231Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334Expansion control features
    • B60R21/2342Tear seams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23Inflatable members
    • B60R21/237Inflatable members characterised by the way they are folded

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

The airbag (4) is constituted by the peripheral assembly of a lower (3) and upper (1) textile panel partially concertinaed. In the bag flat position the pleats (5) of the upper panel are held in place by fusible connections (6). During inflation of the bag, the connections rupture successively and the bag is deployed progressively in a specified direction.

Description

(1). La présente invention concerne les sacs de sécurité(1). The present invention relates to safety bags

gonflables destinés à équiper les véhicules automobiles.  inflatables intended to equip motor vehicles.

Les sacs de sécurité gonflables connus, montés sur les véhicules automobiles, présentent souvent l'inconvénient de subir, lors du gonflage, un déploiement subit ayant un effet agressif pour l'occupant du véhicule, en particulier si celui-ci occupe une position anormale  Known airbags, mounted on motor vehicles, often have the disadvantage of undergoing, during inflation, a sudden deployment having an aggressive effect on the occupant of the vehicle, in particular if the latter occupies an abnormal position.

très proche du sac.very close to the bag.

D'autre part, parmi les sacs de sécurité gonflables connus, il en est qui présentent une forme en trois dimensions, par assemblage d'un panneau central et de deux panneaux latéraux identiques. La réalisation de tels sacs est difficile, car ne pouvant étre effectuée à plat, et demande plus de temps en augmentant le prix de revient du sac. La présente invention a pour objet de remédier aux inconvénients ci-dessus mentionnés des sacs de sécurité gonflables connus, en proposant un sac dont le mode de déploiement est amélioré pour être rendu progressif et donc non agressif, et en proposant un sac similaire aux sacs en trois dimensions, mais dont la réalisation s'effectue à  On the other hand, among the known inflatable safety bags, there are some which have a three-dimensional shape, by assembling a central panel and two identical side panels. The production of such bags is difficult, since it cannot be carried out flat, and requires more time by increasing the cost price of the bag. The object of the present invention is to remedy the above-mentioned drawbacks of known inflatable safety bags, by proposing a bag whose deployment mode is improved to be made progressive and therefore non-aggressive, and by proposing a bag similar to bags in three dimensions, but which are produced at

plat et se trouve donc sensiblement facilitée.  flat and is therefore significantly facilitated.

L' invention a également pour objet de proposer un tel sac de sécurité gonflable qui puisse être utilisé comme sac à multiples volumes, lorsqu'il est équipé d'un générateur  Another object of the invention is to provide such an inflatable safety bag which can be used as a multi-volume bag when it is equipped with a generator.

de gaz sous pression ayant plusieurs niveaux de pression.  pressurized gas having multiple pressure levels.

Selon l' invention, le sac gonflable de sécurité à déploiement progressif orienté est du type comprenant un panneau inférieur et un panneau supérieur, tous deux en un matériau souple et réunis ensemble par un assemblage périphérique à plat. Il se caractérise en ce que le panneau supérieur est de plus grande longueur que le panneau inférieur et est partiellement replié en accordéon avant son assemblage au panneau inférieur, de sorte que lors du déclenchement le sac se gonfle progressivement en mettant en tens ion succes sivement chacun des pl is qui favorisent un  According to the invention, the oriented progressive deployment airbag is of the type comprising a lower panel and an upper panel, both made of a flexible material and joined together by a peripheral flat assembly. It is characterized in that the upper panel is of greater length than the lower panel and is partially folded in accordion before its assembly with the lower panel, so that when the bag is triggered, the bag gradually inflates by successively tensioning each folds that favor a

sens du déploiement dans une direction.  sense of deployment in one direction.

Le sac étant au repos à plat, les plis peuvent être maintenus en place par l'assemblage périphérique du sac  The bag being at rest flat, the folds can be held in place by the peripheral assembly of the bag

et/ou, en leur milieu, par un élément fusible.  and / or, in the middle, by a fusible element.

Par l'utilisation de liaisons fusibles et tarées se rompant à différentes pressions de fonctionnement, le sac de sécurité gonflable selon l' invention, lorsqu'il est équipé d'un générateur de gaz à plusieurs niveaux de pression, permet un fonctionnement comme sac à volumes multiples. Le sac de séaurité gonflable selon l' invention, qui est applicable dans tout type de configuration de tissu (enduit ou non enduit) , avec tout type d'assemblage (cousu, soudé, collé), et qui peut être utilisé comme sac conducteur, sac passager ou sac de protection latérale, présente un déploiement orienté et progressif et de ce fait non agressif. Il est dé plus similaire à un sac en trois  By the use of fused and tared connections rupturing at different operating pressures, the airbag according to the invention, when equipped with a gas generator with several pressure levels, allows operation as a bag multiple volumes. The inflatable safety bag according to the invention, which is applicable in any type of fabric configuration (coated or uncoated), with any type of assembly (sewn, welded, glued), and which can be used as a conductive bag, passenger bag or side protection bag, has an oriented and progressive deployment and is therefore non-aggressive. It is more similar to a bag in three

dimensions mais réalisé à plat.dimensions but made flat.

On remarque que, de par son principe de fonctionnement basé sur un système mécanique simple, lt invention n' est pas sensible aux variations pouvant influer sur le système de sac de sécurité gonflable. Ce système s'affranchit des variations de la température d'utilisation de la pression fournie par les générateurs de gaz. On remarquera aussi que le principe de fonctionnement passif du sac selon l' invention lui confère une plus grande sécurité. Dans le cas d'une position hors normes de l' occupant (position très rapprochée du sac) ce principe  It is noted that, by virtue of its operating principle based on a simple mechanical system, the invention is not sensitive to variations which may influence the airbag system. This system overcomes variations in the temperature of use of the pressure supplied by the gas generators. It will also be noted that the principle of passive operation of the bag according to the invention gives it greater security. In the case of an outsized position of the occupant (position very close to the bag) this principle

est particulièrement efficace.is particularly effective.

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: l es figures 1 et 2 sont de s vues en pl an respective s des deux panneaux de tissu destinés à être assemblés entre eux pour constituer un sac de sécurité gonflable selon l' invention; la figure 3 est une vue en perspective du sac selon l' invention, à plat, après pliage en accordéon du panneau supérieur et assemblage entre eux des deux panneaux; et l es figures 4a à 4d sont des vues en perspective de s phases successives du déploiement progressif du sac selon  To clearly understand the invention, there will be described below, by way of example without limitation, a preferred embodiment with reference to the appended schematic drawing in which: Figures 1 and 2 are views in pl respective years of the two fabric panels intended to be assembled together to form an inflatable safety bag according to the invention; FIG. 3 is a perspective view of the bag according to the invention, flat, after accordion folding of the upper panel and assembly of the two panels between them; and Figures 4a to 4d are perspective views of successive phases of the progressive deployment of the bag according to

l' invention.the invention.

En référence à la figure 1, on a représenté le panneau supérieur 1, de forme ovale et réalisé en tissu (enduit ou non), du sac de sécurité gonflable selon l' invention. Ce panneau 1 est destiné à être plié en accordéon, sur une partie de sa longueur, autour de lignes de pliage transvereales 2. A la figure 2 on a représenté le panneau inférieur 3 du sac, également en tissu enduit, dont la longueur correspond à celle du panneau supérieur 1 lorsque celui-ci a été replié sur lui-même autour des  Referring to Figure 1, there is shown the upper panel 1, of oval shape and made of fabric (coated or not), of the inflatable safety bag according to the invention. This panel 1 is intended to be folded in an accordion, over part of its length, around transverse fold lines 2. In FIG. 2, the bottom panel 3 of the bag is shown, also in coated fabric, the length of which corresponds to that of the upper panel 1 when the latter has been folded in on itself around the

lignes 2.lines 2.

A la figure 3 le sac de sécurité gonflable 4, représenté à plat, a été obtenu par assemblage périphérique, par exemple par soudage, des panneaux 1 et 3 entre eux. On voit sur le dessin les plis en accordéon 5 de la partie centrale du panneau supérieur 1, et on a représenté en 6 une couture constituant un élément fusible  In FIG. 3 the inflatable safety bag 4, shown flat, was obtained by peripheral assembly, for example by welding, of the panels 1 and 3 between them. We see in the drawing the accordion folds 5 of the central part of the upper panel 1, and there is shown at 6 a seam constituting a fusible element

et qui retient en place, en son milieu, chaque pli 5.  and which holds in place, in the middle, each fold 5.

Les plis 5 réalisés sur la face supérieure 1 du sac 4 sont déterminés pour donner à celui-ci sa forme finale, ses  The folds 5 made on the upper face 1 of the bag 4 are determined to give it its final shape, its

différents volumes et les étapes de son déploiement.  different volumes and the stages of its deployment.

On décrira maintenant le fonctionnement du sac de sécurité gonflable selon l' invention, en référence aux figures 4a à 4d. Lors du déclenchement du dispositif, par exemple à la suite d'un choc, le sac 4 se gonfle progressivement en mettant en tension chacun des plis 5 (figures 4a à 4c). Ces plis 5 agissent comme des guides favorisant un sens de déploiement du sac dans une direction (direction de la flèche des figures 4a à 4d). Les fixations fusibles 6 se rompent successivement, et celles-ci peuvent accélérer ou ralentir le déploiement du sac 4 selon leur résistance. En fin de déploiement (figure 4d), le sac 4 atteint une phase d'équilibre dans laquelle il présente sa forme finale, qui est définie par la tension créée par les  The operation of the inflatable safety bag according to the invention will now be described, with reference to FIGS. 4a to 4d. When the device is triggered, for example following an impact, the bag 4 gradually inflates by putting each of the plies 5 under tension (FIGS. 4a to 4c). These folds 5 act as guides promoting a direction of deployment of the bag in one direction (direction of the arrow in FIGS. 4a to 4d). The fuse fasteners 6 break successively, and these can accelerate or slow the deployment of the bag 4 according to their resistance. At the end of deployment (Figure 4d), the bag 4 reaches an equilibrium phase in which it presents its final shape, which is defined by the tension created by the

plis 5 pris dans l'assemblage des panneaux 1 et 3.  folds 5 taken from the assembly of panels 1 and 3.

On remarquera que le sac de sécurité gonflable 4 selon l' invention peut, s'il est équipé d'un générateur de gaz sous pression délivrant sélectivement plusieurs niveaux de pression, fonctionner comme un sac à volumes multiples, certaines seulement des liaisons fusibles 6 se rompant  It will be noted that the inflatable safety bag 4 according to the invention can, if it is equipped with a pressurized gas generator selectively delivering several pressure levels, function as a multi-volume bag, only some of the fusible links 6 breaking

selon le niveau de pression fourni au sac.  depending on the pressure level supplied to the bag.

On remarquera aussi que l' invention permet la réalisation d'un sac de sécurité gonflable en trois dimensions, dont l' assemblage est facilité puisque pouvant  It will also be noted that the invention allows the production of an inflatable safety bag in three dimensions, the assembly of which is facilitated since it can

être effectué à plat.be done flat.

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  given by way of example, without limitation, and that additions or constructive modifications could be made without departing from the scope of the

présente invention.present invention.

Claims (3)

REVENDICATIONS 1. Sac gonflable de sécurité à déploiement progressif orienté, comprenant un panneau inférieur (3) et un panneau supérieur (l), tous deux en un matériau souple et réunis ensemble par un assemblage périphérique à plat, caractérisé en ce que le panneau supérieur (l) est de plus grande longueur que le panneau inférieur (3) et est partiellement replié en accordéon avant son assemblage au panneau inférieur (l), de sorte que lors du déclenchement le sac (4) se gonfle progressivement en mettant en tension successivement chacun des plis (5) qui favorisent un sens  1. Oriented progressive deployment safety airbag, comprising a lower panel (3) and an upper panel (l), both made of a flexible material and joined together by a peripheral flat assembly, characterized in that the upper panel ( l) is of greater length than the lower panel (3) and is partially folded in accordion before its assembly with the lower panel (l), so that when the bag is triggered (4) inflates gradually by putting each in tension successively folds (5) that promote meaning de déploiement dans une direction.deployment in one direction. 2. Sac gonflable de sécurité selon la revendication l, caractérisé en ce que, le sac étant au repos à plat, chaque pli (5) est maintenu en place par une liaison  2. Inflatable safety bag according to claim l, characterized in that, the bag being at rest flat, each ply (5) is held in place by a connection fusible (6) disposé de préférence en son milieu.  fuse (6) preferably placed in the middle. 3. Sac gonflable de sécurité selon l'une quelconque  3. Safety airbag according to any one des revendications précédentes, équipé d'un générateur de  of the preceding claims, equipped with a generator gaz sous pression à plusieurs niveaux de pression, caractérisé en ce que les liaisons fusibles (6) présentent des résistances différentes à la rupture en permettant, selon le niveau de pression fourni par le générateur,  gas under pressure at several pressure levels, characterized in that the fusible links (6) have different resistance to rupture allowing, depending on the pressure level supplied by the generator,
FR0105670A 2001-04-27 2001-04-27 INFLATABLE SAFETY BAG WITH ORIENTED AND PROGRESSIVE DEPLOYMENT Expired - Fee Related FR2824029B1 (en)

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FR0105670A FR2824029B1 (en) 2001-04-27 2001-04-27 INFLATABLE SAFETY BAG WITH ORIENTED AND PROGRESSIVE DEPLOYMENT

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7296822B2 (en) * 2002-11-22 2007-11-20 Trw Vehicle Safety Systems Inc. Inflatable windshield curtain
JP2008044479A (en) * 2006-08-11 2008-02-28 Nippon Plast Co Ltd Airbag device
EP2145803A1 (en) * 2008-07-18 2010-01-20 Dalphi Metal Espana, S.A. Low volume driver airbag
EP2190698A1 (en) * 2007-08-27 2010-06-02 Key Safety Systems, Inc. Knee airbag module
DE102007005304B4 (en) * 2007-02-02 2010-11-11 Autoliv Development Ab airbag
EP2272726A1 (en) * 2009-07-10 2011-01-12 Autoliv Development AB An air-bag for a motor vehicle
US20140091562A1 (en) * 2011-06-01 2014-04-03 Takata Corporation Airbag and airbag device
US9340174B1 (en) 2015-04-14 2016-05-17 Autoliv Asp, Inc. Flat panel pleated airbag cushions and related methods and systems
GB2559463A (en) * 2016-12-14 2018-08-08 Ford Global Tech Llc Door mounted airbag assembly with concave surface

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015100504A1 (en) 2015-01-14 2016-07-14 Autoliv Development Ab passenger airbag
US10604259B2 (en) 2016-01-20 2020-03-31 Amsafe, Inc. Occupant restraint systems having extending restraints, and associated systems and methods
EP4360962A1 (en) * 2022-10-24 2024-05-01 Autoliv Development AB Side air-bag

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JPH0769149A (en) * 1993-09-02 1995-03-14 Takata Kk Air bag device for assistant driver's seat
US5732973A (en) * 1996-07-22 1998-03-31 Trw Vehicle Safety Systems Inc. Tuck folded air bag
DE19860804A1 (en) * 1998-12-30 2000-07-06 Volkswagen Ag Driver's airbag arrangement in motor vehicle has folded driver's airbag(s) built into dashboard for filling by gas generator and unfoldable in front of driver via airbag outlet opening

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0769149A (en) * 1993-09-02 1995-03-14 Takata Kk Air bag device for assistant driver's seat
US5732973A (en) * 1996-07-22 1998-03-31 Trw Vehicle Safety Systems Inc. Tuck folded air bag
DE19860804A1 (en) * 1998-12-30 2000-07-06 Volkswagen Ag Driver's airbag arrangement in motor vehicle has folded driver's airbag(s) built into dashboard for filling by gas generator and unfoldable in front of driver via airbag outlet opening

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 06 31 July 1995 (1995-07-31) *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7296822B2 (en) * 2002-11-22 2007-11-20 Trw Vehicle Safety Systems Inc. Inflatable windshield curtain
JP2008044479A (en) * 2006-08-11 2008-02-28 Nippon Plast Co Ltd Airbag device
DE102007005304B4 (en) * 2007-02-02 2010-11-11 Autoliv Development Ab airbag
EP2190698A1 (en) * 2007-08-27 2010-06-02 Key Safety Systems, Inc. Knee airbag module
EP2190698A4 (en) * 2007-08-27 2011-04-20 Key Safety Systems Inc Knee airbag module
EP2145803A1 (en) * 2008-07-18 2010-01-20 Dalphi Metal Espana, S.A. Low volume driver airbag
EP2272726A1 (en) * 2009-07-10 2011-01-12 Autoliv Development AB An air-bag for a motor vehicle
US20140091562A1 (en) * 2011-06-01 2014-04-03 Takata Corporation Airbag and airbag device
US9120455B2 (en) * 2011-06-01 2015-09-01 Takata Corporation Airbag and airbag device
US9340174B1 (en) 2015-04-14 2016-05-17 Autoliv Asp, Inc. Flat panel pleated airbag cushions and related methods and systems
GB2559463A (en) * 2016-12-14 2018-08-08 Ford Global Tech Llc Door mounted airbag assembly with concave surface
US10493941B2 (en) 2016-12-14 2019-12-03 Ford Global Technologies, Llc Door mounted airbag assembly with concave surface

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