EP2550184A1 - Inflatable airbag arrangement comprising a reinforced flap - Google Patents

Inflatable airbag arrangement comprising a reinforced flap

Info

Publication number
EP2550184A1
EP2550184A1 EP11711279A EP11711279A EP2550184A1 EP 2550184 A1 EP2550184 A1 EP 2550184A1 EP 11711279 A EP11711279 A EP 11711279A EP 11711279 A EP11711279 A EP 11711279A EP 2550184 A1 EP2550184 A1 EP 2550184A1
Authority
EP
European Patent Office
Prior art keywords
flap
link
reinforcing rod
reinforcing
plate
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.)
Withdrawn
Application number
EP11711279A
Other languages
German (de)
French (fr)
Inventor
Daniel Ory
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.)
Faurecia Interieur Industrie SAS
Original Assignee
Faurecia Interieur Industrie 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 Faurecia Interieur Industrie SAS filed Critical Faurecia Interieur Industrie SAS
Publication of EP2550184A1 publication Critical patent/EP2550184A1/en
Withdrawn legal-status Critical Current

Links

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
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/216—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member comprising tether means for limitation of cover motion during deployment
    • 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
    • B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards

Definitions

  • the invention relates to an airbag arrangement fitted to a motor vehicle dashboard positioned for example to protect the passenger installed next to the driver of the vehicle.
  • Such an arrangement comprises a flap integral with the dashboard body having its generally rectangular contour delimited by a precut made on the underside of the dashboard body, so that this flap is not visible to an occupant of the dashboard. vehicle.
  • An airbag module is attached to the underside of the dashboard body, at the flap, so that when the inflation of the cushion is triggered, this cushion exerts a pressure on the underside of the flap to cause the inflation of the airbag. opening of this component by breaking the precut. The opening of the shutter then allows the safety cushion to deploy to the passenger compartment of the vehicle to protect the corresponding occupant.
  • Such a flap typically has a rectangular outline, and is articulated relative to the rest of the body of the dashboard at the transverse edge of its contour which is closest to the windshield of the vehicle.
  • This or these links protrude opposite edges of the outline of the flap which are oriented in the direction of advance of the vehicle, and they are secured to a fixed part of the assembly while being relatively loose between this fixed part and the shutter.
  • the opening of the flap is limited by the length of the link or ties that are then stretched when the flap reaches a certain degree of opening.
  • the object of the invention is to propose a solution to remedy this drawback.
  • the subject of the invention is an arrangement for a motor vehicle airbag comprising a flap covering an airbag module, this flap comprising a flap body to which a reinforcing plate is attached and being articulated by relative to a fixed part to open on inflation of the cushion, and comprising a linear link comprising a central portion secured to the flap and two lateral portions protruding from two opposite edges of the flap to be secured to a fixed part in order to limit the opening of the flap during inflation of the cushion, the linear link having its central portion; attached to the shutter being taken between the shutter body and the reinforcement plate fixed on the lower face of this shutter body, characterized in that the shutter comprises a reinforcing rod along the contour of this shutter at least in the regions where the link extends beyond opposite edges of this flap, the link being located between the reinforcing rod and the flap body in areas where this link protrudes from opposite edges of this flap.
  • the risk of rupture of the reinforcement plate and / or the shutter during the sudden powering of the links is virtually canceled because the mechanical forces exerted by the link on the reinforcing plate are transferred to this plate through the rod which thus distributes these forces along the edge of the reinforcing plate.
  • the risk of breakage of the shutter is thus substantially canceled.
  • the invention also relates to an arrangement as defined above, wherein the reinforcing rod is interposed between the reinforcing plate and the link in regions where this link protrudes from the opposite edges of the shutter.
  • the invention also relates to an arrangement as defined above, wherein the reinforcing rod is overmolded in the reinforcing plate.
  • the invention also relates to an arrangement as defined above, wherein the reinforcing rod is metallic.
  • the invention also relates to an arrangement as defined above, in which the metal rod runs along the entire contour of the shutter.
  • the invention also relates to an arrangement as defined above, wherein the reinforcing rod is fitted at ribs of the reinforcing plate by which this plate is fixed to the shutter body.
  • the invention also relates to an arrangement as defined above, in which the ribs of the reinforcing plate are oriented perpendicularly to the opposite edges of the flap over which the link extends, and in which each rib has a notch for receiving the reinforcing rod. .
  • Figure 1 is a schematic representation partially showing the arrangement according to the invention in accordance with a vertical sectional plane oriented in the direction of advance of the vehicle;
  • Figure 2 is a partial schematic representation of the arrangement according to the invention in accordance with a transverse cutting plane with respect to the direction of travel of the vehicle.
  • the idea underlying the invention is to provide a rod along the contour of the flap at the level where the link protrudes from this component so that the mechanical stress exerted by the link when it is stretched is distributed throughout the stem on the reinforcement plate.
  • a dashboard body 2 which here has a convex shape, comprises a flap 3 capable of pivoting about a transverse axis marked by 4 corresponding to the edge transverse front of this flap 3, this axis 4 extending in a plane normal to Figure 1.
  • This component 3 comprises a shutter body 5 integral part of the dashboard body 2 being delimited on the one hand by the axis 4, and secondly by a U-shaped precut.
  • This precut defines the two opposite side edges of the flaps 3, identified by 7 and 8 in Figure 2, which extend parallel to the direction of travel of the vehicle represented by the arrow A of Figure 1, and the rear transverse edge of the flap body 5 which is indicated by 6 in the figure 1.
  • a firing channel generally indicated by 9 is attached to the lower face 11 of the dashboard, being positioned to surround the outline of the flap.
  • This firing channel 9 has a general shape of pipe portion, oriented in a direction normal to the dashboard body 2.
  • the upper end of this channel 9 matches the curve of the lower face 11, and its lower end defines the opposite a flat face marked by 12 which is intended to receive an airbag module not shown.
  • the shutter 3 is formed by the shutter body 5 stiffened by a reinforcing plate 13 attached to its lower face, and on which the safety cushion exerts its pressure to cause the opening of the shutter by breaking the precut during deployment.
  • This reinforcing plate 13 is made of plastic or the like, being formed of a main wall 14 provided with a set of ribs, here six ribs marked 16 to 21.
  • the main wall 14 is oriented parallel to the flap body 5, and the ribs 16-21 protrude from the upper face of the main wall extending transversely to the direction of advance AT.
  • the reinforcement plate is attached to the face lower part of the shutter body 5 for example with an ultrasonic welding process, whereby the upper edges of the ribs 16-21 are secured to the underside of the shutter body 5.
  • the main wall 14 is separated from the shutter body 5 by a distance corresponding to the height of the ribs to define a space partitioned by these ribs.
  • the flap 3 also comprises a reinforcing rod 22 folded to have a rectangular shape corresponding to that of the contour of the flap while having dimensions substantially smaller than those of the contour.
  • This reinforcing rod 22 may be a metal rod, but it may also be made of another material such as a plastics material having greater rigidity than the reinforcing plate 13.
  • This reinforcing rod may thus be made of polyamide or of polypropylene incorporating glass fibers.
  • This rod 22 is engaged at the ribs of the reinforcing plate 13 to occupy a position in which it is substantially resting on the upper face of the main wall 14 and in which it runs along the periphery of the shutter body 5 and the reinforcing plate 13.
  • Each transverse rib 16-21 is for this purpose provided at each of its ends with a notch oriented perpendicularly to the main wall 14 and opening into the upper edge this rib.
  • the two notches of the rib 21 are shown in FIG. 2, where they are indicated by 23 and 24.
  • the retaining link of the shutter 3, indicated by 26 in the figures, is a linear link comprising a central portion 27 which is engaged between the two ribs contiguous 20 and 21 which are closest to the transverse edge 6, being superimposed on the reinforcing rod 22 which is thus interposed between the link 26 and the main wall 14.
  • the central portion 27 of the link 26 is extended by two lateral portions marked by 28 and 29 and which respectively protrude from the lateral edges 7 and 8 of the flap 3, each of these portions being attached to a fixed part, not shown, such as for example a flap attached to the firing channel, or to the dashboard body 2, or to the cushion module.
  • the safety cushion During inflation of the safety cushion, it first deploys in the firing channel 9 to be pressed against the wall 14 of the shutter 3 by exerting a pressure on it causing the tearing of the board edge along the pre-cut 6, and thereby the opening of the flap.
  • the opening of the shutter 3 suddenly causes the tensioning of the portions 28 and 29 of the link which then exert a mechanical force on the wall 14 by means of the reinforcing rod 22 interposed between this link and the wall 14. Thanks to this reinforcing rod 22, the force exerted by the severely tensioned link is distributed all along the rod 22, thereby reducing the mechanical stress experienced by the reinforcement plate when the shutter is immobilized in the open position.
  • the assembly of the shutter of the arrangement according to the invention can advantageously be made by firstly fitting the reinforcing rod 22 on the reinforcing plate 13, then placing the central portion 27 of the link 26 between the ribs 20 and 21, and by fixing the reinforcing plate equipped with these two elements, to the lower face of the shutter body 5, by welding ultrasound or other.
  • the reinforcing rod is fitted on the reinforcing plate, but it can also be provided that it is totally or partially overmolded in this reinforcing plate.

Abstract

The invention relates to a motor vehicle inflatable airbag arrangement (1) including a flap (3) that covers an inflatable airbag module. The flap (3) comprises a body (5) having a reinforcing plate (13) secured thereto and said flap is hinged to a stationary part (2) so as to open upon inflation of the airbag. In addition, a linear link (26) is solidly connected to the flap (3) and to the stationary part (2) in order to restrict the opening of the flap (3) as the airbag is being inflated. The linear link (26) is secured to the flap (3), being clamped between the body (5) and the plate (13) that is secured to the body (5). The flap (3) comprises a reinforcing rod (22) disposed between the plate (13) and the link (26), said reinforcing rod (22) extending along the edge of the flap (3) at least in the area where the link (26) extends beyond said edge.

Description

AGENCEMENT DE COUSSIN DE SECURITE GONFLABLE  INFLATABLE SAFETY CUSHION ARRANGEMENT
COMPRENANT UN VOLET RENFORCE  INCLUDING A REINFORCED STRENGTH
L' invention concerne un agencement de coussin de sécurité gonflable équipant une planche de bord de véhicule automobile positionné par exemple pour protéger le passager installé à côté du conducteur de ce véhicule. The invention relates to an airbag arrangement fitted to a motor vehicle dashboard positioned for example to protect the passenger installed next to the driver of the vehicle.
ARRIERE PLAN DE L' INVENTION  BACKGROUND OF THE INVENTION
Un tel agencement comporte un volet faisant partie intégrante du corps de planche de bord en ayant son contour généralement rectangulaire délimité par une prédécoupe réalisée en face inférieure du corps de planche de bord, de sorte que ce volet n'est pas visible pour un occupant du véhicule.  Such an arrangement comprises a flap integral with the dashboard body having its generally rectangular contour delimited by a precut made on the underside of the dashboard body, so that this flap is not visible to an occupant of the dashboard. vehicle.
Un module de coussin de sécurité gonflable est fixé à la face inférieure du corps de planche de bord, au niveau du volet, de sorte que lorsque le gonflage du coussin est déclenché, ce coussin exerce une pression à la face inférieure du volet pour provoquer l'ouverture de ce volet par rupture de la prédécoupe. L'ouverture du volet permet alors au coussin de sécurité de se déployer vers l'habitacle du véhicule afin de protéger l'occupant correspondant .  An airbag module is attached to the underside of the dashboard body, at the flap, so that when the inflation of the cushion is triggered, this cushion exerts a pressure on the underside of the flap to cause the inflation of the airbag. opening of this component by breaking the precut. The opening of the shutter then allows the safety cushion to deploy to the passenger compartment of the vehicle to protect the corresponding occupant.
Un tel volet a typiquement un contour rectangulaire, et il est articulé par rapport au reste du corps de la planche de bord au niveau du bord transversal de son contour qui est le plus proche du pare brise du véhicule .  Such a flap typically has a rectangular outline, and is articulated relative to the rest of the body of the dashboard at the transverse edge of its contour which is closest to the windshield of the vehicle.
Pour éviter que le volet ne heurte le pare brise lors de son ouverture, il est connu de prévoir un ou des liens qui sont fixés au volet et au reste du corps de planche de bord.  To prevent the flap from striking the windshield when it opens, it is known to provide one or links that are attached to the flap and the rest of the dashboard body.
Ce ou ces liens dépassent des bords opposés du contour du volet qui sont orientés selon la direction d'avancement du véhicule, et ils sont solidarisés à une partie fixe de l'ensemble tout en étant relativement lâches entre cette partie fixe et le volet. Lors du gonflage du coussin, l'ouverture du volet est limitée par la longueur du ou des liens qui se tendent alors lorsque le volet atteint un certain degré d'ouverture. This or these links protrude opposite edges of the outline of the flap which are oriented in the direction of advance of the vehicle, and they are secured to a fixed part of the assembly while being relatively loose between this fixed part and the shutter. When the cushion is inflated, the opening of the flap is limited by the length of the link or ties that are then stretched when the flap reaches a certain degree of opening.
Dans une solution connue du document de brevet EP0872389, on prévoit un lien unique, sous forme d'une boucle dont les deux brins s'étendent transversalement sur toute la largeur du volet, et dont les extrémités sont solidarisées à des attaches fixes situées à hauteur du module de coussin de sécurité. Ce lien en forme de boucle est solidarisé au volet en étant interposée entre la face inférieure du corps de volet et une plaque de renforcement du volet qui est fixée à cette face inférieure .  In a known solution of patent document EP0872389, there is provided a single link, in the form of a loop whose two strands extend transversely over the entire width of the flap, and whose ends are secured to fixed fasteners located at height. of the safety cushion module. This loop-shaped link is secured to the shutter by being interposed between the lower face of the shutter body and a flap reinforcing plate which is fixed to this lower face.
En pratique, la rapidité de gonflage du coussin de sécurité engendre des contraintes mécaniques importantes au niveau du volet lorsque les liens se tendent brutalement sous l'effet de ce gonflage pour limiter l'ouverture du volet.  In practice, the rapid inflation of the safety cushion generates significant mechanical stresses at the flap when the links are suddenly tightened under the effect of this inflation to limit the opening of the flap.
Ces contraintes peuvent provoquer un déchirement voire une destruction de la plaque de renforcement et/ou du corps de volet, engendrant par là même un risque de projection des parties brisées de cette plaque vers le ou les occupants du véhicule.  These constraints may cause tearing or destruction of the reinforcement plate and / or the shutter body, thereby generating a risk of projection of the broken parts of this plate to the occupant or occupants of the vehicle.
OBJET DE L'INVENTION  OBJECT OF THE INVENTION
Le but de l'invention est de proposer une solution pour remédier à cet inconvénient.  The object of the invention is to propose a solution to remedy this drawback.
RESUME DE L'INVENTION  SUMMARY OF THE INVENTION
A cet effet, l'invention a pour objet un agencement de coussin de sécurité gonflable de véhicule automobile comprenant un volet couvrant un module de coussin de sécurité gonflable, ce volet comprenant un corps de volet auquel est fixée une plaque de renforcement et étant articulé par rapport à une partie fixe pour s'ouvrir sur gonflage du coussin, et comportant un lien linéaire comprenant une portion centrale solidarisée au volet ainsi que deux portions latérales dépassant de deux bords opposés du volet pour être solidarisés à une partie fixe afin de limiter l'ouverture du volet lors du gonflage du coussin, le lien linéaire ayant sa portion centrale fixée au volet en étant prise entre le corps de volet et la plaque de renforcement fixée en face inférieure de ce corps de volet, caractérisé en ce que le volet comporte une tige de renforcement longeant le contour de ce volet au moins dans les régions ou le lien dépasse des bords opposés de ce volet, le lien étant situé entre la tige de renforcement et le corps de volet dans les régions où ce lien dépasse des bords opposés de ce volet. To this end, the subject of the invention is an arrangement for a motor vehicle airbag comprising a flap covering an airbag module, this flap comprising a flap body to which a reinforcing plate is attached and being articulated by relative to a fixed part to open on inflation of the cushion, and comprising a linear link comprising a central portion secured to the flap and two lateral portions protruding from two opposite edges of the flap to be secured to a fixed part in order to limit the opening of the flap during inflation of the cushion, the linear link having its central portion; attached to the shutter being taken between the shutter body and the reinforcement plate fixed on the lower face of this shutter body, characterized in that the shutter comprises a reinforcing rod along the contour of this shutter at least in the regions where the link extends beyond opposite edges of this flap, the link being located between the reinforcing rod and the flap body in areas where this link protrudes from opposite edges of this flap.
Grâce à la tige de renforcement, le risque de rupture de la plaque de renfort et/ou du volet lors de la mise sous tension brutale des liens est pratiquement annulé car les efforts mécaniques exercés par le lien sur la plaque de renforcement sont transférés vers cette plaque par l'intermédiaire de la tige qui répartit ainsi ces efforts le long du bord de la plaque de renforcement. Le risque de bris du volet est ainsi sensiblement annulé.  Thanks to the reinforcing rod, the risk of rupture of the reinforcement plate and / or the shutter during the sudden powering of the links is virtually canceled because the mechanical forces exerted by the link on the reinforcing plate are transferred to this plate through the rod which thus distributes these forces along the edge of the reinforcing plate. The risk of breakage of the shutter is thus substantially canceled.
L' invention concerne également un agencement tel que défini ci-dessus, dans lequel la tige de renforcement est interposée entre la plaque de renforcement et le lien dans les régions où ce lien dépasse des bords opposés du volet .  The invention also relates to an arrangement as defined above, wherein the reinforcing rod is interposed between the reinforcing plate and the link in regions where this link protrudes from the opposite edges of the shutter.
L'invention concerne également un agencement tel que défini ci-dessus, dans lequel la tige de renforcement est surmoulée dans la plaque de renforcement.  The invention also relates to an arrangement as defined above, wherein the reinforcing rod is overmolded in the reinforcing plate.
L'invention concerne également un agencement tel que défini ci-dessus, dans lequel la tige de renforcement est métallique.  The invention also relates to an arrangement as defined above, wherein the reinforcing rod is metallic.
L'invention concerne également un agencement tel que défini ci-dessus, dans lequel la tige métallique longe la totalité du contour du volet. The invention also relates to an arrangement as defined above, in which the metal rod runs along the entire contour of the shutter.
L' invention concerne également un agencement tel que défini ci-dessus, dans lequel la tige de renforcement est emboîtée au niveau de nervures de la plaque de renforcement par lesquelles cette plaque est fixée au corps de volet.  The invention also relates to an arrangement as defined above, wherein the reinforcing rod is fitted at ribs of the reinforcing plate by which this plate is fixed to the shutter body.
L' invention concerne également un agencement tel que défini ci-dessus, dans lequel les nervures de la plaque de renforcement sont orientées perpendiculairement aux bords opposés du volet dont dépasse le lien, et dans lequel chaque nervure comporte une encoche pour recevoir la tige de renforcement.  The invention also relates to an arrangement as defined above, in which the ribs of the reinforcing plate are oriented perpendicularly to the opposite edges of the flap over which the link extends, and in which each rib has a notch for receiving the reinforcing rod. .
BREVE DESCRIPTION DES FIGURES  BRIEF DESCRIPTION OF THE FIGURES
La figure 1 est une représentation schématique montrant partiellement l'agencement selon l'invention conformément à un plan de coupe vertical orienté selon la direction d'avancement du véhicule ;  Figure 1 is a schematic representation partially showing the arrangement according to the invention in accordance with a vertical sectional plane oriented in the direction of advance of the vehicle;
La figure 2 est une représentation schématique partielle de l'agencement selon l'invention conformément à un plan de coupe transversal par rapport à la direction d'avancement du véhicule.  Figure 2 is a partial schematic representation of the arrangement according to the invention in accordance with a transverse cutting plane with respect to the direction of travel of the vehicle.
DESCRIPTION DETAILLEE DE L'INVENTION  DETAILED DESCRIPTION OF THE INVENTION
L'idée à la base de l'invention est de prévoir une tige longeant le contour du volet au niveau où le lien dépasse de ce volet pour que la contrainte mécanique exercée par le lien lorsqu' il se tend soit répartie tout le long de la tige sur la plaque de renforcement.  The idea underlying the invention is to provide a rod along the contour of the flap at the level where the link protrudes from this component so that the mechanical stress exerted by the link when it is stretched is distributed throughout the stem on the reinforcement plate.
Comme visible dans la figure 1 dans laquelle l'invention est généralement repérée par 1, un corps de planche de bord 2 qui a ici une forme bombée, comprend un volet 3 apte à pivoter autour d'un axe transversal repéré par 4 correspondant au bord transversal avant de ce volet 3, cet axe 4 s' étendant selon un plan normal à la figure 1.  As can be seen in FIG. 1, in which the invention is generally indicated by 1, a dashboard body 2 which here has a convex shape, comprises a flap 3 capable of pivoting about a transverse axis marked by 4 corresponding to the edge transverse front of this flap 3, this axis 4 extending in a plane normal to Figure 1.
Ce volet 3 comprend un corps de volet 5 faisant partie intégrante du corps de planche de bord 2 en étant délimité d'une part par l'axe 4, et d'autre part par une prédécoupe en forme de U. Cette prédécoupe définit les deux bords latéraux opposés de ce volets 3, repérés par 7 et 8 dans la figure 2, qui s'étendent parallèlement à la direction d' avancement du véhicule représentée par la flèche A de la figure 1, ainsi que le bord transversal arrière du corps de volet 5 qui est repéré par 6 dans la figure 1. This component 3 comprises a shutter body 5 integral part of the dashboard body 2 being delimited on the one hand by the axis 4, and secondly by a U-shaped precut. This precut defines the two opposite side edges of the flaps 3, identified by 7 and 8 in Figure 2, which extend parallel to the direction of travel of the vehicle represented by the arrow A of Figure 1, and the rear transverse edge of the flap body 5 which is indicated by 6 in the figure 1.
Un canal de tir généralement repéré par 9 est fixé à la face inférieure 11 de la planche de bord, en étant positionné pour entourer le contour du volet. Ce canal de tir 9 a une forme générale de portion de conduite, orientée selon une direction normale au corps de planche de bord 2. L'extrémité supérieure de ce canal 9 épouse le galbe de la face inférieure 11, et son extrémité inférieure définit au contraire une face plane repérée par 12 qui est destinée à recevoir un module de coussin de sécurité gonflable non représenté.  A firing channel generally indicated by 9 is attached to the lower face 11 of the dashboard, being positioned to surround the outline of the flap. This firing channel 9 has a general shape of pipe portion, oriented in a direction normal to the dashboard body 2. The upper end of this channel 9 matches the curve of the lower face 11, and its lower end defines the opposite a flat face marked by 12 which is intended to receive an airbag module not shown.
Le volet 3 est formé par le corps de volet 5 rigidifié par une plaque de renforcement 13 fixée à sa face inférieure, et sur laquelle le coussin de sécurité exerce sa pression pour provoquer l'ouverture du volet par rupture de la prédécoupe lors du déploiement.  The shutter 3 is formed by the shutter body 5 stiffened by a reinforcing plate 13 attached to its lower face, and on which the safety cushion exerts its pressure to cause the opening of the shutter by breaking the precut during deployment.
Cette plaque de renforcement 13 est fabriquée en matière plastique ou analogue en étant formée d'une paroi principale 14 pourvue d'un ensemble de nervures, ici six nervures repérées par 16 à 21.  This reinforcing plate 13 is made of plastic or the like, being formed of a main wall 14 provided with a set of ribs, here six ribs marked 16 to 21.
Comme visible dans les figures 1 et 2, la paroi principale 14 est orientée parallèlement au corps de volet 5, et les nervures 16-21 dépassent de la face supérieure de cette paroi principale en s' étendant transversalement par rapport à la direction d'avancement A.  As shown in Figures 1 and 2, the main wall 14 is oriented parallel to the flap body 5, and the ribs 16-21 protrude from the upper face of the main wall extending transversely to the direction of advance AT.
La plaque de renforcement est fixée à la face inférieure du corps de volet 5 par exemple avec un procédé de soudage par ultrasons, par lequel les bords supérieurs des nervures 16-21 sont solidarisés à la face inférieure du corps de volet 5. Ainsi, lorsque le volet 3 est assemblé, la paroi principale 14 est séparée du corps de volet 5 par une distance correspondant à la hauteur des nervures pour définir un espace cloisonné par ces nervures . The reinforcement plate is attached to the face lower part of the shutter body 5 for example with an ultrasonic welding process, whereby the upper edges of the ribs 16-21 are secured to the underside of the shutter body 5. Thus, when the shutter 3 is assembled, the main wall 14 is separated from the shutter body 5 by a distance corresponding to the height of the ribs to define a space partitioned by these ribs.
Le volet 3 comporte également une tige 22 renforçante repliée pour avoir une forme rectangulaire correspondant à celle du contour du volet tout en ayant des dimensions sensiblement plus petites que celles du contour.  The flap 3 also comprises a reinforcing rod 22 folded to have a rectangular shape corresponding to that of the contour of the flap while having dimensions substantially smaller than those of the contour.
Cette tige renforçante 22 peut être une tige métallique, mais elle peut également être fabriquée dans un autre matériau tel qu'une matière plastique présentant une plus grande rigidité que la plaque de renfort 13. Cette tige renforçante peut ainsi être fabriquée en polyamide ou bien en polypropylène intégrant des fibres de verre.  This reinforcing rod 22 may be a metal rod, but it may also be made of another material such as a plastics material having greater rigidity than the reinforcing plate 13. This reinforcing rod may thus be made of polyamide or of polypropylene incorporating glass fibers.
Cette tige 22 est emboîtée au niveau des nervures de la plaque de renfort 13 pour occuper une position dans laquelle elle est sensiblement en appui sur la face supérieure de la paroi principale 14 et dans laquelle elle longe intérieurement le pourtour du corps de volet 5 et de la plaque renforçante 13.  This rod 22 is engaged at the ribs of the reinforcing plate 13 to occupy a position in which it is substantially resting on the upper face of the main wall 14 and in which it runs along the periphery of the shutter body 5 and the reinforcing plate 13.
Chaque nervure transversale 16-21 est à cet effet pourvue à chacune de ses extrémités d'une encoche orientée perpendiculairement à la paroi principale 14 et débouchant dans le bord supérieur cette nervure. Les deux encoches de la nervure 21 sont représentées dans la figure 2 en y étant repérées par 23 et 24.  Each transverse rib 16-21 is for this purpose provided at each of its ends with a notch oriented perpendicularly to the main wall 14 and opening into the upper edge this rib. The two notches of the rib 21 are shown in FIG. 2, where they are indicated by 23 and 24.
Le lien de retenue du volet 3, repéré par 26 dans les figures, est un lien linéaire comportant une portion centrale 27 qui est engagée entre les deux nervures contiguës 20 et 21 qui sont les plus proches du bord transversal 6, en étant superposé à la tige renforçante 22 qui est ainsi interposée entre le lien 26 et la paroi principale 14. The retaining link of the shutter 3, indicated by 26 in the figures, is a linear link comprising a central portion 27 which is engaged between the two ribs contiguous 20 and 21 which are closest to the transverse edge 6, being superimposed on the reinforcing rod 22 which is thus interposed between the link 26 and the main wall 14.
La portion centrale 27 du lien 26 est prolongée par deux portions latérales repérées par 28 et 29 et qui dépassent respectivement des bords latéraux 7 et 8 du volet 3, chacune de ces portions étant attachée à une partie fixe non représentée, comme par exemple une patte d'accrochage fixée au canal de tir, ou bien au corps de planche de bord 2, ou encore au module de coussin de sécurité .  The central portion 27 of the link 26 is extended by two lateral portions marked by 28 and 29 and which respectively protrude from the lateral edges 7 and 8 of the flap 3, each of these portions being attached to a fixed part, not shown, such as for example a flap attached to the firing channel, or to the dashboard body 2, or to the cushion module.
Lors du gonflage du coussin de sécurité, celui-ci se déploie dans un premier temps dans le canal de tir 9 pour venir s'appliquer contre la paroi 14 du volet 3 en exerçant une pression sur celle-ci provoquant le déchirement de la planche de bord le long de la prédécoupe 6, et par là même l'ouverture du volet.  During inflation of the safety cushion, it first deploys in the firing channel 9 to be pressed against the wall 14 of the shutter 3 by exerting a pressure on it causing the tearing of the board edge along the pre-cut 6, and thereby the opening of the flap.
L' ouverture du volet 3 provoque brutalement la mise sous tension des portions 28 et 29 du lien qui exercent alors un effort mécanique sur la paroi 14 par l'intermédiaire de la tige de renforcement 22 interposée entre ce lien et la paroi 14. Grâce à cette tige de renforcement 22, l'effort exercé par le lien brutalement mis sous tension est réparti tout le long de la tige 22, réduisant par là même la contrainte mécanique subie par la plaque de renforcement lorsque le volet est immobilisé en position ouverte.  The opening of the shutter 3 suddenly causes the tensioning of the portions 28 and 29 of the link which then exert a mechanical force on the wall 14 by means of the reinforcing rod 22 interposed between this link and the wall 14. Thanks to this reinforcing rod 22, the force exerted by the severely tensioned link is distributed all along the rod 22, thereby reducing the mechanical stress experienced by the reinforcement plate when the shutter is immobilized in the open position.
L'assemblage du volet de l'agencement selon l'invention peut avantageusement être réalisé en emboîtant d'abord la tige renforçante 22 sur la plaque renforçante 13, en plaçant ensuite la portion centrale 27 du lien 26 entre les nervures 20 et 21, et en fixant la plaque renforçante équipée de ces deux éléments, à la face inférieure du corps de volet 5, par soudage ultrasons ou autre. The assembly of the shutter of the arrangement according to the invention can advantageously be made by firstly fitting the reinforcing rod 22 on the reinforcing plate 13, then placing the central portion 27 of the link 26 between the ribs 20 and 21, and by fixing the reinforcing plate equipped with these two elements, to the lower face of the shutter body 5, by welding ultrasound or other.
Dans l'exemple des figures, la tige renforçante est emboîtée sur la plaque de renfort, mais il peut également être prévu qu'elle soit totalement ou partiellement surmoulée dans cette plaque de renfort.  In the example of the figures, the reinforcing rod is fitted on the reinforcing plate, but it can also be provided that it is totally or partially overmolded in this reinforcing plate.

Claims

REVENDICATIONS
1. Agencement (1) de coussin de sécurité gonflable de véhicule automobile comprenant un volet (3) couvrant un module de coussin de sécurité gonflable, ce volet (3) comprenant un corps de volet (5) auquel est fixée une plaque de renforcement (13) et étant articulé par rapport à une partie fixe (2) pour s'ouvrir sur gonflage du coussin, et comportant un lien linéaire (26) comprenant une portion centrale (27) solidarisée au volet (3) ainsi que deux portions latérales (28, 29) dépassant de deux bords opposés (7, 8) du volet pour être solidarisés à une partie fixe (2) afin de limiter l'ouverture du volet lors du gonflage du coussin, le lien linéaire (26) ayant sa portion centrale (27) fixée au volet (3) en étant prise entre le corps de volet (5) et la plaque de renforcement (13) fixée en face inférieure de ce corps de volet (5) , caractérisé en ce que le volet (3) comporte une tige de renforcement (22) longeant le contour de ce volet (3) au moins dans les régions ou le lien (26) dépasse des bords opposés de ce volet (3) , le lien (26) étant situé entre la tige de renforcement (22) et le corps de volet (5) dans les régions où ce lien (26) dépasse des bords opposés de ce volet (3) .  Motor vehicle airbag arrangement (1) comprising a flap (3) covering an airbag module, said flap (3) comprising a flap body (5) to which is attached a reinforcing plate ( 13) and being articulated with respect to a fixed part (2) to open on inflation of the cushion, and comprising a linear link (26) comprising a central portion (27) secured to the flap (3) as well as two lateral portions ( 28, 29) protruding from two opposite edges (7, 8) of the shutter to be secured to a fixed part (2) to limit the opening of the flap during inflation of the cushion, the linear link (26) having its central portion (27) fixed to the flap (3) being taken between the flap body (5) and the reinforcing plate (13) fixed on the lower face of this flap body (5), characterized in that the flap (3) comprises a reinforcing rod (22) along the contour of this flap (3) at least in the regions or the link (26) protrudes from opposite edges of this flap (3), the link (26) being located between the reinforcing rod (22) and the flap body (5) in regions where this link (26) exceeds opposite edges of this flap (3).
2. Agencement selon la revendication 1, dans lequel la tige de renforcement (22) est interposée entre la plaque de renforcement (13) et le lien (26) dans les régions où ce lien dépasse des bords opposés du volet (3) .  2. Arrangement according to claim 1, wherein the reinforcing rod (22) is interposed between the reinforcement plate (13) and the link (26) in regions where this link protrudes from the opposite edges of the flap (3).
3. Agencement selon la revendication 1, dans lequel la tige de renforcement (22) est surmoulée dans la plaque de renforcement (13).  3. An arrangement according to claim 1, wherein the reinforcing rod (22) is overmolded in the reinforcing plate (13).
4. Agencement selon l'une des revendications 1 à 3, dans lequel la tige de renforcement (22) est métallique .  4. Arrangement according to one of claims 1 to 3, wherein the reinforcing rod (22) is metallic.
5. Agencement selon l'une des revendications 1 à 4, dans lequel la tige de renforcement (22) longe la totalité du contour du volet (3). 5. Arrangement according to one of claims 1 to 4, wherein the reinforcing rod (22) runs along the entire contour of the flap (3).
6. Agencement selon l'une des revendications 1, 3, 4 ou 5, dans lequel la tige de renforcement (22) est emboîtée au niveau de nervures (16-21) de la plaque de renforcement (13) par lesquelles cette plaque (13) est fixée au corps de volet (5) .  6. Arrangement according to one of claims 1, 3, 4 or 5, wherein the reinforcing rod (22) is engaged at ribs (16-21) of the reinforcing plate (13) by which this plate ( 13) is fixed to the shutter body (5).
7. Agencement selon la revendication 6, dans lequel les nervures (16-21) de la plaque de renforcement (13) sont orientées perpendiculairement aux bords opposés (7, 8) du volet (3) dont dépasse le lien (26), et dans lequel chaque nervure (16-21) comporte une encoche (23, 24) pour recevoir la tige de renforcement (22) .  7. An arrangement according to claim 6, wherein the ribs (16-21) of the reinforcing plate (13) are oriented perpendicular to the opposite edges (7, 8) of the flap (3) which exceeds the link (26), and wherein each rib (16-21) has a notch (23, 24) for receiving the reinforcing rod (22).
EP11711279A 2010-03-24 2011-03-23 Inflatable airbag arrangement comprising a reinforced flap Withdrawn EP2550184A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1052134A FR2957870B1 (en) 2010-03-24 2010-03-24 INFLATABLE SAFETY CUSHION ARRANGEMENT COMPRISING A REINFORCED SHAFT
PCT/EP2011/001443 WO2011116949A1 (en) 2010-03-24 2011-03-23 Inflatable airbag arrangement comprising a reinforced flap

Publications (1)

Publication Number Publication Date
EP2550184A1 true EP2550184A1 (en) 2013-01-30

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ID=42371400

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Application Number Title Priority Date Filing Date
EP11711279A Withdrawn EP2550184A1 (en) 2010-03-24 2011-03-23 Inflatable airbag arrangement comprising a reinforced flap

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US (1) US8789844B2 (en)
EP (1) EP2550184A1 (en)
CN (1) CN102892640B (en)
FR (1) FR2957870B1 (en)
WO (1) WO2011116949A1 (en)

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Also Published As

Publication number Publication date
FR2957870B1 (en) 2012-04-20
US20140159352A1 (en) 2014-06-12
FR2957870A1 (en) 2011-09-30
CN102892640A (en) 2013-01-23
WO2011116949A1 (en) 2011-09-29
US8789844B2 (en) 2014-07-29
CN102892640B (en) 2015-05-06

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