EP2550183A1 - Inflatable airbag flap hinged to a dashboard by means of a link configured to release an additional length of link upon the opening of the flap - Google Patents

Inflatable airbag flap hinged to a dashboard by means of a link configured to release an additional length of link upon the opening of the flap

Info

Publication number
EP2550183A1
EP2550183A1 EP11711278A EP11711278A EP2550183A1 EP 2550183 A1 EP2550183 A1 EP 2550183A1 EP 11711278 A EP11711278 A EP 11711278A EP 11711278 A EP11711278 A EP 11711278A EP 2550183 A1 EP2550183 A1 EP 2550183A1
Authority
EP
European Patent Office
Prior art keywords
link
flap
stop
dashboard
fixed
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Withdrawn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
EP11711278A
Other languages
German (de)
French (fr)
Inventor
Daniel Ory
Thierry Schupbach
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 EP2550183A1 publication Critical patent/EP2550183A1/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Withdrawn legal-status Critical Current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
    • B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
    • 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
    • B60R21/215—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
    • B60R2021/2163—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 with energy absorbing or elastic means

Definitions

  • the invention relates to an airbag arrangement fitted to a motor vehicle dashboard being 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 having its outline delimited by a pre-cut on the underside of the dashboard, so that the flap is not visible to a vehicle occupant.
  • An airbag module is attached to the underside of the dashboard, 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 opening of this shutter by breaking the precut. The opening then allows the airbag 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 before its contour, namely the edge that is closest to the windshield of the vehicle.
  • Each link has an upper end rigidly secured to the underside of the flap, near the front edge of this flap relative to the A direction of advance of the vehicle, and a lower end which is secured to the dashboard 2, to be slidable relative thereto.
  • each link 3 is passed in a corresponding tab 4 fixed to the front edge of the opening 6 of the dashboard which receives the flap 1.
  • Each link 3 has a general shape of band or strap having a lower end 7 wider than the opening defined by each tab 4, thus forming a stop blocking the link when its termination 7 reaches the level of the tab.
  • the inflation of the safety cushion when the inflation of the safety cushion is triggered, it causes the opening of the flap which unfolds in a combined movement of lifting the flap relative to the dashboard and rotation around the front edge of this flap .
  • the object of the invention is to propose a solution to overcome the above disadvantages.
  • the subject of the invention is an airbag arrangement of a motor vehicle dashboard, comprising a flap covering a safety cushion module, a link secured to the flap and rigidly secured fixed means. of the dashboard to form an articulation of the flap relative to the dashboard, characterized in that the link is flexible and in that a portion of said link surrounds a stop carried by the fixed means or by the flap while being fixed to the fixed means or to the shutter at a certain distance from this stop, so that on opening of the shutter, the linear link pulls fixed means or shutter on a predetermined length to bear against the stop in order to release an additional length of link to increase the mobility of the shutter.
  • the invention also relates to an arrangement as defined above, wherein the link portion surrounding the abutment is fixed to the fixed means or the flap by interlocking in retaining means spaced from the abutment.
  • the invention also relates to an arrangement as defined above, wherein the retaining means comprise a lug located between the link portion. they hold and the abutment, each lug being breakable to break on opening the flap to release the portion of the link so that it bears against the stop.
  • the invention also relates to an arrangement as defined above, in which the link is a link of linear type and in which the retaining means form a groove.
  • the invention also relates to an arrangement as defined above, wherein the stop is an integral part of a firing channel fixed on the lower face of the dashboard around the flap, and in which the link portion surrounding the stop is attached to the firing channel.
  • the invention also relates to an arrangement as defined above, wherein the link is a round section cable made of synthetic fibers.
  • Figure 1 is a perspective representation of a known arrangement
  • Figure 2 is a schematic representation of the arrangement according to the invention seen in a vertical section plane oriented in the direction of travel of the vehicle;
  • Figure 3 is a schematic representation showing the arrangement according to the invention in a vertical section plane oriented parallel to the flap.
  • the invention is based on the search for a solution in which the link surrounds a stop so as to constitute a secure fastener not likely to give way under the effect of the forces developed by the assembly when the inflation of the cushion is triggered.
  • an instrument panel 12 comprises a flap 13 delimited by a precut made in the lower face of this dashboard, this flap having only its front part visible in FIG.
  • This pre-cut which has a generally rectangular shape to delimit the outline of the flap defines in particular its front edge, indicated by 14 in FIG. 2, which extends horizontally and transversely with respect to the direction of advance A of the vehicle, this edge 14 thus extending in a direction normal to the plane of Figure 2.
  • a firing channel generally identified by 16 is fixed to the lower face 17 of the body of the dashboard, for example by ultrasonic welding, in a position such that it surrounds the flap 13.
  • This firing channel has a general shape of pipe whose upper end matches the curve of the dashboard, and whose lower end is instead flat to receive a not shown cushion module.
  • the figures show the front portion of this firing channel 16, that is to say the portion that runs along the front edge 14 of the flap 13, this front portion constituting a fixed means rigidly secured to the dashboard, and to which is secured a link 18 by which the flap 13 is attached to the dashboard.
  • the front portion of the firing channel comprises in the region of attachment of the link 18 a portion having a box-like shape or the like, marked 19 in FIGS. 2 and 3, and which is surrounded by the link 18 so as to constitute a stop against which this link comes into support on opening of the flap 13.
  • This stop 19 has in the figures a general form of box, but many other forms are also possible since they constitute a protuberance protruding from the lower face 17, towards the low, being adapted to be surrounded by a link so as to hold it firmly during the opening.
  • the link 18 is represented in solid lines for the rest situation corresponding to the case where the flap has not been opened and in which this link is fixed to the front portion of the firing channel 16, and is represented by dashed lines for the activated situation corresponding to the case where the flap has been opened or is being opened and in which this link 18 is detached from the firing channel while bearing against the stop 19.
  • This link 18 which is linear type comprises a central portion 21 which surrounds the stop 19, and which is extended by two portions or attachment strands marked respectively by 22 and 23, visible only partially, and whose extensions are rigidly. fixed to the flap 13, for example at the lower face of this flap.
  • the link 18 is preferably flexible. As shown by way of example in FIGS. 2 and 3, the link 18 is made by a round cable. This cable has a polyethylene or polyester core surrounded by a braided sheath. The use of a flexible link facilitates assembly and is inexpensive. But above all, such a link does not risk damaging the bag during inflation, while the use of a rigid piece of metal or plastic requires care not to tear the bag.
  • the central portion 21 of the link 18 is fixed to the front portion of the firing channel 16 at a position where it is spaced from the abutment 19 that surrounds the link 18.
  • This attachment is provided here by simple interlocking the central portion 21 in retaining means 24 which here have a groove shape formed in the front portion of the firing channel 16, and which is therefore rigidly secured to the dashboard.
  • the retaining means form a groove delimited on the one hand by two lugs 26 and 27, and on the other hand by a front wall 28 spaced from these lugs by a distance corresponding to the diameter of the link 21. .
  • the two lugs 26 and 27 are spaced transversely from one another while being located between the link portion 21 and the stop 19, and are oriented to protrude downwardly of the arrangement, while extending parallel to each other. at the stop 19.
  • the front wall extends transversely being located in front of the lugs 26 and 27, and is oriented as the lugs to protrude downwardly of the arrangement being oriented parallel to the generally vertical direction of the stop 19.
  • Fixing the link 18 to the front part of the firing channel 16 thus consists in placing it around the abutment 19, and engaging the portion 21 of this link between, on the one hand, the wall 28 and, on the other hand, the lugs 26 and 27 to encase it in the throat that these three elements delimit jointly.
  • the one or more links 18 replace the links 3 of the prior art shown in FIG. 1.
  • the links 18 therefore form a loose hinge allowing the flap 13 to be raised and then pivoted. when the portion 21 abuts.
  • the link surrounds an abutment integrated with the fixed means that constitutes the firing channel being attached to this firing channel.
  • a symmetrical mounting is also conceivable, that is to say a mounting in which the stop is instead carried by the flap, the link then surrounding this stop being fixed to the flap at a distance from this stop.

Landscapes

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

Abstract

The invention relates to an inflatable airbag arrangement (11) for a motor vehicle dashboard, comprising: a flap that covers an airbag module, and a link (18) that is solidly connected to the flap and to stationary means (16) which are rigidly secured to the dashboard, in order to form a hinge between the flap and the dashboard. According to the invention, a portion (21) of the flexible link (18) surrounds a stop element (19) forming part of the aforementioned stationary means (16) and is secured to said means (16) at a certain distance from the stop element (19), such that, upon the opening of the flap, the linear link (18) disengages from the stationary means (16) in order to bear on the stop element (19) so as to release an additional length of link, thereby allowing the mobility of the flap to be increased.

Description

VOLET DE COUSSIN DE SECURITE GONFLABLE ARTICULE SUR UNE PLANCHE DE BORD PAR UN LIEN AGENCE POUR LIBERER UNE LONGUEUR SUPPLEMENTAIRE DE LIEN SUR OUVERTURE DE CE INFLATABLE SAFETY CUSHION PAD JOINED ON A DASHBOARD BY AN AGENCY LINK TO RELEASE AN ADDITIONAL LENGTH OF LINK ON OPENING THIS
VOLET SHUTTER
L' invention concerne un agencement de coussin de sécurité gonflable équipant une planche de bord de véhicule automobile en étant 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 being 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 de la planche de bord en ayant son contour délimité par une prédécoupe réalisée en face inférieure de la 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 having its outline delimited by a pre-cut on the underside of the dashboard, so that the flap is not visible to a vehicle occupant.
Un module de coussin de sécurité gonflable est fixé à la face inférieure de la 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 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, 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 opening of this shutter by breaking the precut. The opening then allows the airbag 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 avant de son contour, à savoir le bord 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 before its contour, namely the edge that is closest to the windshield of the vehicle.
Dans une solution connue du document US565346 et représentée en figure 1, le volet qui est généralement repéré par 1 est articulé sur une planche de bord 2 au moyen de deux liens repérés par 3.  In a known solution of US565346 and shown in Figure 1, the flap which is generally indicated by 1 is articulated on a dashboard 2 by means of two links marked by 3.
Chaque lien comporte une extrémité supérieure rigidement solidarisée à la face inférieure du volet, à proximité du bord avant de ce volet par rapport à la direction d'avancement A du véhicule, et une extrémité inférieure qui est solidarisée à la planche de bord 2, pour être coulissante par rapport à celle-ci. Each link has an upper end rigidly secured to the underside of the flap, near the front edge of this flap relative to the A direction of advance of the vehicle, and a lower end which is secured to the dashboard 2, to be slidable relative thereto.
A cet effet, et comme visible dans la figure 1, chaque lien 3 est passé dans une patte correspondante 4 fixée au bord avant de l'ouverture 6 de la planche de bord qui reçoit le volet 1. Chaque lien 3 a une forme générale de bande ou sangle ayant une terminaison inférieure 7 plus large que l'ouverture délimitée par chaque patte 4, formant ainsi un arrêtoir bloquant le lien lorsque sa terminaison 7 arrive au niveau de la patte .  For this purpose, and as visible in Figure 1, each link 3 is passed in a corresponding tab 4 fixed to the front edge of the opening 6 of the dashboard which receives the flap 1. Each link 3 has a general shape of band or strap having a lower end 7 wider than the opening defined by each tab 4, thus forming a stop blocking the link when its termination 7 reaches the level of the tab.
En pratique, lorsque le gonflage du coussin de sécurité est déclenché, celui-ci provoque l'ouverture du volet qui se déroule selon un mouvement combiné de soulèvement du volet par rapport à la planche de bord et de rotation autour du bord avant de ce volet.  In practice, when the inflation of the safety cushion is triggered, it causes the opening of the flap which unfolds in a combined movement of lifting the flap relative to the dashboard and rotation around the front edge of this flap .
Le soulèvement du volet par rapport au reste de la planche de bord est rendu possible par le coulissement des liens 3 dans les pattes 4 selon une direction approximativement verticale, jusqu'à ce que les terminaisons 7 de ces liens arrivent en butée sur ces pattes 4.  The lifting of the flap relative to the rest of the dashboard is made possible by the sliding links 3 in the legs 4 in an approximately vertical direction, until the terminations 7 of these links abut on these lugs 4 .
En pratique, il est nécessaire que le volet puisse se soulever par rapport au reste de la planche de bord pour que son ouverture se produise selon une cinématique appropriée, notamment sans risque de blocage. Mais le montage à liens coulissants illustré en figure 1 est inadapté à une solution industrialisable, sa mise en œuvre étant trop coûteuse au regard des prix pratiqués.  In practice, it is necessary that the flap can be raised relative to the rest of the dashboard so that its opening occurs in an appropriate kinematics, including without risk of blockage. But the sliding link assembly illustrated in Figure 1 is unsuitable for an industrializable solution, its implementation is too expensive in terms of prices.
En particulier, compte tenu des efforts importants en jeu lors de l'ouverture du volet, il subsiste un risque significatif que les terminaisons de liens traversent malgré tout les pattes, ce qui se traduit par la projection du volet dans l'habitacle du véhicule pouvant par là même blesser un occupant. In particular, given the significant efforts involved in the opening of the component, there remains a significant risk that the end of links still cross the legs, which results in the projection of the flap in the passenger compartment. vehicle could thereby injure an occupant.
OBJET DE L' INVENTION  OBJECT OF THE INVENTION
Le but de l'invention est de proposer une solution pour remédier aux inconvénients ci-dessus.  The object of the invention is to propose a solution to overcome the above disadvantages.
RESUME DE L' INVENTION  SUMMARY OF THE INVENTION
A cet effet, l'invention a pour objet un agencement de coussin de sécurité gonflable d'une planche de bord de véhicule automobile, comprenant un volet couvrant un module de coussin de sécurité, un lien solidarisé au volet et à des moyens fixes rigidement solidaires de la planche de bord pour constituer une articulation du volet par rapport à la planche de bord, caractérisé en ce que le lien est souple et en ce qu'une portion dudit lien entoure une butée portée par les moyens fixes ou par le volet tout en étant fixée aux moyens fixes ou au volet à une certaine distance de cette butée, de telle manière que sur ouverture du volet, le lien linéaire s'arrache des moyens fixes ou du volet sur une longueur prédéterminée pour venir en appui sur la butée afin de libérer une longueur supplémentaire de lien permettant d'accroître la mobilité du volet.  To this end, the subject of the invention is an airbag arrangement of a motor vehicle dashboard, comprising a flap covering a safety cushion module, a link secured to the flap and rigidly secured fixed means. of the dashboard to form an articulation of the flap relative to the dashboard, characterized in that the link is flexible and in that a portion of said link surrounds a stop carried by the fixed means or by the flap while being fixed to the fixed means or to the shutter at a certain distance from this stop, so that on opening of the shutter, the linear link pulls fixed means or shutter on a predetermined length to bear against the stop in order to release an additional length of link to increase the mobility of the shutter.
Avec cette solution, on obtient instantanément la libération d'une longueur de liens prédéterminée lorsque le volet s'ouvre, pour autoriser son soulèvement tout en maintenant de manière sure le volet solidarisé à la planche de bord grâce au fait que le lien entoure une butée fixe.  With this solution, we obtain instantaneously the release of a predetermined length of links when the flap opens, to allow its lifting while maintaining securely the component secured to the dashboard due to the fact that the link surrounds a stop fixed.
L' invention concerne également un agencement tel que défini ci-dessus, dans lequel la portion de lien entourant la butée est fixée aux moyens fixes ou au volet par emboîtement dans des moyens de retenue espacés de la butée .  The invention also relates to an arrangement as defined above, wherein the link portion surrounding the abutment is fixed to the fixed means or the flap by interlocking in retaining means spaced from the abutment.
L' invention concerne également un agencement tel que défini ci-dessus, dans lequel les moyens de retenue comportent un ergot située entre la portion de lien qu'ils retiennent et la butée, chaque ergot étant sécable pour se casser sur ouverture du volet afin de libérer la portion de lien pour qu'elle vienne en appui sur la butée . The invention also relates to an arrangement as defined above, wherein the retaining means comprise a lug located between the link portion. they hold and the abutment, each lug being breakable to break on opening the flap to release the portion of the link so that it bears against the stop.
L'invention concerne également un agencement tel que défini ci-dessus, dans lequel le lien est un lien de type linéaire et dans lequel les moyens de retenue forment une gorge.  The invention also relates to an arrangement as defined above, in which the link is a link of linear type and in which the retaining means form a groove.
L' invention concerne également un agencement tel que défini ci-dessus, dans lequel la butée fait partie intégrante d'un canal de tir fixé en face inférieure de la planche de bord autour du volet, et dans lequel la portion de lien entourant la butée est fixée au canal de tir .  The invention also relates to an arrangement as defined above, wherein the stop is an integral part of a firing channel fixed on the lower face of the dashboard around the flap, and in which the link portion surrounding the stop is attached to the firing channel.
L'invention concerne également un agencement tel que défini ci-dessus, dans lequel le lien est un câble de section ronde réalisé en fibres synthétiques.  The invention also relates to an arrangement as defined above, wherein the link is a round section cable made of synthetic fibers.
BREVE DESCRIPTION DES FIGURES  BRIEF DESCRIPTION OF THE FIGURES
La figure 1 est une représentation en perspective d'un agencement connu ;  Figure 1 is a perspective representation of a known arrangement;
La figure 2 est une représentation schématique de l'agencement selon l'invention vu dans un plan de section vertical orienté selon la direction d'avancement du véhicule ;  Figure 2 is a schematic representation of the arrangement according to the invention seen in a vertical section plane oriented in the direction of travel of the vehicle;
La figure 3 est une représentation schématique montrant l'agencement selon l'invention dans un plan de section vertical orienté parallèlement au volet.  Figure 3 is a schematic representation showing the arrangement according to the invention in a vertical section plane oriented parallel to the flap.
DESCRIPTION DETAILLEE DE L'INVENTION  DETAILED DESCRIPTION OF THE INVENTION
L'invention est basée sur la recherche d'une solution dans laquelle le lien entoure une butée de manière à constituer une attache sûre ne risquant pas de céder sous l'effet des efforts développés par l'ensemble lorsque le gonflage du coussin est déclenché.  The invention is based on the search for a solution in which the link surrounds a stop so as to constitute a secure fastener not likely to give way under the effect of the forces developed by the assembly when the inflation of the cushion is triggered.
Comme visible dans les figures 2 et 3 dans lesquelles l'invention est généralement repérée par 11, une planche de bord 12 comporte un volet 13 délimité par une prédécoupe effectuée en face inférieure de cette planche de bord, ce volet ayant uniquement sa partie avant visible dans la figure 2. As can be seen in FIGS. 2 and 3 in which the invention is generally indicated by 11, an instrument panel 12 comprises a flap 13 delimited by a precut made in the lower face of this dashboard, this flap having only its front part visible in FIG.
Cette prédécoupe qui a une forme généralement rectangulaire pour délimiter le contour du volet définit notamment son bord avant, repéré par 14 en figure 2, qui s'étend horizontalement et transversalement par rapport à la direction d'avancement A du véhicule, ce bord 14 s' étendant ainsi selon une direction normale au plan de la figure 2.  This pre-cut which has a generally rectangular shape to delimit the outline of the flap defines in particular its front edge, indicated by 14 in FIG. 2, which extends horizontally and transversely with respect to the direction of advance A of the vehicle, this edge 14 thus extending in a direction normal to the plane of Figure 2.
Un canal de tir généralement repéré par 16 est fixé à la face inférieure 17 du corps de la planche de bord, par exemple par soudage ultrasons, a une position telle qu'il entoure le volet 13. Ce canal de tir a une forme générale de conduite dont l'extrémité supérieure épouse le galbe de la planche de bord, et dont l'extrémité inférieure est au contraire plane pour recevoir un module de coussin de sécurité non représenté.  A firing channel generally identified by 16 is fixed to the lower face 17 of the body of the dashboard, for example by ultrasonic welding, in a position such that it surrounds the flap 13. This firing channel has a general shape of pipe whose upper end matches the curve of the dashboard, and whose lower end is instead flat to receive a not shown cushion module.
Les figures montrent la portion avant de ce canal de tir 16, c'est-à-dire la portion qui longe le bord avant 14 du volet 13, cette portion avant constituant un moyen fixe rigidement solidarisé à la planche de bord, et auquel est solidarisé un lien 18 par lequel le volet 13 est rattaché à la planche de bord.  The figures show the front portion of this firing channel 16, that is to say the portion that runs along the front edge 14 of the flap 13, this front portion constituting a fixed means rigidly secured to the dashboard, and to which is secured a link 18 by which the flap 13 is attached to the dashboard.
La portion avant du canal de tir comporte dans la région d'attache du lien 18 une partie ayant une forme de caisson ou analogue, repérée par 19 dans les figures 2 et 3, et qui est entourée par le lien 18 de manière à constituer une butée contre laquelle ce lien vient en appui sur ouverture du volet 13.  The front portion of the firing channel comprises in the region of attachment of the link 18 a portion having a box-like shape or the like, marked 19 in FIGS. 2 and 3, and which is surrounded by the link 18 so as to constitute a stop against which this link comes into support on opening of the flap 13.
Cette butée 19 a dans les figures une forme générale de caisson, mais de multiples autres formes sont également possibles dès lors qu'elles constituent une protubérance dépassant de la face inférieure 17, vers le bas, en étant adaptée à être entourée par un lien de manière à le retenir fermement lors de l'ouverture. This stop 19 has in the figures a general form of box, but many other forms are also possible since they constitute a protuberance protruding from the lower face 17, towards the low, being adapted to be surrounded by a link so as to hold it firmly during the opening.
Le lien 18 est représenté en traits pleins pour la situation de repos correspondant au cas où le volet n'a pas été ouvert et dans laquelle ce lien est fixé à la portion avant du canal de tir 16, et il est représenté en traits pointillés pour la situation activée correspondant au cas où le volet a été ouvert ou est en cours d'ouverture et dans laquelle ce lien 18 est détaché du canal de tir en étant en appui contre la butée 19.  The link 18 is represented in solid lines for the rest situation corresponding to the case where the flap has not been opened and in which this link is fixed to the front portion of the firing channel 16, and is represented by dashed lines for the activated situation corresponding to the case where the flap has been opened or is being opened and in which this link 18 is detached from the firing channel while bearing against the stop 19.
Ce lien 18 qui est de type linéaire comprend une portion centrale 21 qui entoure la butée 19, et qui est prolongée par deux portions ou brins d' attache repérés respectivement par 22 et 23, visibles uniquement de manière partielle, et dont les prolongements sont rigidement fixés au volet 13, par exemple au niveau de la face inférieure de ce volet.  This link 18 which is linear type comprises a central portion 21 which surrounds the stop 19, and which is extended by two portions or attachment strands marked respectively by 22 and 23, visible only partially, and whose extensions are rigidly. fixed to the flap 13, for example at the lower face of this flap.
Le lien 18 est de préférence souple. Comme représenté à titre d'exemple aux figures 2 et 3, le lien 18 est réalisé par un câble rond. Ce câble présente une âme en polyéthylène ou polyester entourée par une gaine tressée. L'utilisation d'un lien souple facilite le montage et s'avère peu onéreux. Mais surtout, un tel lien ne risque pas d'endommager le sac lors du gonflage, tandis que l'utilisation d'une pièce rigide en métal ou en plastique nécessite des précautions pour ne pas déchirer le sac.  The link 18 is preferably flexible. As shown by way of example in FIGS. 2 and 3, the link 18 is made by a round cable. This cable has a polyethylene or polyester core surrounded by a braided sheath. The use of a flexible link facilitates assembly and is inexpensive. But above all, such a link does not risk damaging the bag during inflation, while the use of a rigid piece of metal or plastic requires care not to tear the bag.
Dans l'état de repos la portion centrale 21 du lien 18 est fixée à la portion avant du canal de tir 16 à une position où elle est espacée de la butée 19 qu'entoure le lien 18. Cette fixation est assurée ici par simple emboîtement de la portion centrale 21 dans des moyens de retenue 24 qui ont ici une forme de gorge formée dans la portion avant du canal de tir 16, et qui est donc rigidement solidaire de la planche de bord. Dans l'exemple des figures, les moyens de retenue forment une gorge délimitée d'une part par deux ergots 26 et 27, et d'autre part par une paroi frontale 28 espacée de ces ergots d'une distance correspondant au diamètre du lien 21. In the state of rest the central portion 21 of the link 18 is fixed to the front portion of the firing channel 16 at a position where it is spaced from the abutment 19 that surrounds the link 18. This attachment is provided here by simple interlocking the central portion 21 in retaining means 24 which here have a groove shape formed in the front portion of the firing channel 16, and which is therefore rigidly secured to the dashboard. In the example of the figures, the retaining means form a groove delimited on the one hand by two lugs 26 and 27, and on the other hand by a front wall 28 spaced from these lugs by a distance corresponding to the diameter of the link 21. .
Les deux ergots 26 et 27 sont espacés transversalement l'un de l'autre tout en étant situés entre la portion de lien 21 et la butée 19, et ils sont orientés pour dépasser vers le bas de l'agencement, en s' étendant parallèlement à la butée 19. La paroi frontale s'étend transversalement en étant située en avant des ergots 26 et 27, et elle est orientée comme les ergots pour dépasser vers le bas de l'agencement en étant orientée parallèlement à la direction généralement verticale de la butée 19.  The two lugs 26 and 27 are spaced transversely from one another while being located between the link portion 21 and the stop 19, and are oriented to protrude downwardly of the arrangement, while extending parallel to each other. at the stop 19. The front wall extends transversely being located in front of the lugs 26 and 27, and is oriented as the lugs to protrude downwardly of the arrangement being oriented parallel to the generally vertical direction of the stop 19.
La fixation du lien 18 à la partie avant du canal de tir 16 consiste ainsi à le placer autour de la butée 19, et à engager la portion 21 de ce lien entre d'une part la paroi 28 et d'autre part les ergots 26 et 27 pour l'emboîter dans la gorge que ces trois éléments délimitent conjointement.  Fixing the link 18 to the front part of the firing channel 16 thus consists in placing it around the abutment 19, and engaging the portion 21 of this link between, on the one hand, the wall 28 and, on the other hand, the lugs 26 and 27 to encase it in the throat that these three elements delimit jointly.
Comme on l'aura compris, le ou les liens 18 viennent en remplacement des liens 3 de l'art antérieur représenté à la figure 1. Les liens 18 forment donc une charnière lâche autorisant un soulèvement du volet 13, puis un pivotement de celui-ci quand la portion 21 vient en butée.  As will have been understood, the one or more links 18 replace the links 3 of the prior art shown in FIG. 1. The links 18 therefore form a loose hinge allowing the flap 13 to be raised and then pivoted. when the portion 21 abuts.
En fonctionnement, lorsque le gonflage du coussin de sécurité est déclenché, ce coussin vient en appui à la face inférieure du volet 13, ce qui a pour effet d' initier son ouverture par rupture de la découpe délimitant le contour de ce volet. Le volet commence alors à s'ouvrir, ce qui se traduit par une mise sous tension brutale des portions 22 et 23 du lien 18 qui sont rigidement solidarisés à ce volet, ces portions étant alors tirées en direction opposée à la direction d'avancement A du véhicule. In operation, when the inflation of the safety cushion is triggered, this cushion bears against the underside of the flap 13, which has the effect of initiating its opening by breaking the cutout defining the outline of this flap. The shutter then begins to open, which results in a sudden powering of the portions 22 and 23 of the link 18 which are rigidly secured to this flap, these portions being then pulled in the opposite direction to the A direction of the vehicle.
Cette tension est alors appliquée par la portion 21 du lien 18, directement aux ergots 26 et 27 que ce lien entoure. Compte tenu des efforts importants auxquels ces ergots sont alors soumis, ils se brisent pour libérer le lien 18 de la gorge qu'ils délimitent, la portion centrale 21 se déplaçant alors à peu près instantanément en direction opposée à la direction d' avancement A, jusqu'à venir en appui sur la face avant de la butée 19 qui retient alors définitivement ce lien de manière ferme .  This voltage is then applied by the portion 21 of the link 18, directly to the pins 26 and 27 that this link surrounds. Given the significant efforts to which these lugs are then subjected, they break to release the link 18 of the groove they delimit, the central portion 21 then moving about instantaneously in the opposite direction to the direction of advance A, until coming to rest on the front face of the stop 19 which then permanently retains this link firmly.
Durant cette séquence, une longueur prédéterminée supplémentaire de lien est libérée, correspondant à la distance séparant la gorge de retenue de ce lien, de la butée 19, ce qui autorise par là même le soulèvement du volet, pour permettre son ouverture totale sans risque de décrochement de ce volet.  During this sequence, an additional predetermined length of link is released, corresponding to the distance separating the retaining groove of this link, from the stop 19, thereby allowing the flap to be lifted, to allow its total opening without risk of step away from this component.
Dans l'exemple des figures, le lien entoure une butée intégrée aux moyens fixes que constitue le canal de tir en étant fixé à ce canal de tir. Mais un montage symétrique est également envisageable, c'est-à-dire un montage dans lequel la butée est au contraire portée par le volet, le lien entourant alors cette butée en étant fixé au volet à une certaine distance de cette butée.  In the example of the figures, the link surrounds an abutment integrated with the fixed means that constitutes the firing channel being attached to this firing channel. But a symmetrical mounting is also conceivable, that is to say a mounting in which the stop is instead carried by the flap, the link then surrounding this stop being fixed to the flap at a distance from this stop.

Claims

REVENDICATIONS
1. Agencement (11) de coussin de sécurité gonflable d'une planche de bord (12) de véhicule automobile, comprenant un volet (13) couvrant un module de coussin de sécurité, un lien (18) solidarisé au volet (13) et à des moyens fixes (16) rigidement solidaires de la planche de bord (12) pour constituer une articulation du volet (13) par rapport à la planche de bord (12), caractérisé en ce que le lien (18) est souple et qu'une portion (21) dudit lien (18) entoure une butée (19) portée par les moyens fixes (16) ou par le volet (13) tout en étant fixée aux moyens fixes (16) ou au volet (13) à une certaine distance de cette butée (19), de telle manière que sur ouverture du volet (13), le lien linéaire (18) s'arrache des moyens fixes (16) ou du volet (13) sur une longueur prédéterminée pour venir en appui sur la butée (19) afin de libérer une longueur supplémentaire de lien permettant d'accroître la mobilité du volet (13) .  An airbag arrangement (11) of a motor vehicle dashboard (12), comprising a flap (13) covering a cushion module, a link (18) secured to the flap (13) and fixed means (16) rigidly secured to the dashboard (12) to form an articulation of the flap (13) relative to the dashboard (12), characterized in that the link (18) is flexible and that a portion (21) of said link (18) surrounds a stop (19) carried by the fixed means (16) or the flap (13) while being fixed to the fixed means (16) or the flap (13) at a certain distance from this stop (19), so that on opening of the flap (13), the linear link (18) pulls fixed means (16) or flap (13) over a predetermined length to bear on the stop (19) to release an additional length of link to increase the mobility of the flap (13).
2. Agencement selon la revendication 1, dans lequel la portion (21) de lien (18) entourant la butée (19) est fixée aux moyens fixes (16) ou au volet (13) par emboîtement dans des moyens de retenue (24) espacés de la butée (19) .  2. Arrangement according to claim 1, wherein the portion (21) of link (18) surrounding the stop (19) is fixed to the fixed means (16) or the flap (13) by interlocking in retaining means (24). spaced from the stop (19).
3. Agencement selon la revendication 1 ou 2, dans lequel les moyens de retenue (24) comportent un ergot (26, 27) située entre la portion (21) de lien (18) qu'ils retiennent et la butée (19), chaque ergot (26, 27) étant sécable pour se casser sur ouverture du volet (13) afin de libérer la portion (21) de lien (18) pour qu'elle vienne en appui sur la butée (19) .  3. Arrangement according to claim 1 or 2, wherein the retaining means (24) comprise a lug (26, 27) located between the portion (21) link (18) they hold and the stop (19), each lug (26, 27) being breakable to break on opening of the flap (13) to release the portion (21) link (18) so that it bears against the stop (19).
4. Agencement selon l'une des revendications 1 à 3, dans lequel le lien (18) est un lien de type linéaire et dans lequel les moyens de retenue (24) forment une gorge. 4. Arrangement according to one of claims 1 to 3, wherein the link (18) is a linear type link and wherein the retaining means (24) form a groove.
5. Agencement selon l'une des revendications précédentes, dans lequel la butée (19) fait partie intégrante d'un canal de tir (16) fixé en face inférieure de la planche de bord (12) autour du volet (13) , et dans lequel la portion (21) de lien (18) entourant la butée (19) est fixée au canal de tir (16) . 5. Arrangement according to one of the preceding claims, wherein the stop (19) is an integral part of a firing channel (16) fixed on the lower face of the dashboard (12) around the flap (13), and wherein the link portion (21) (18) surrounding the stop (19) is attached to the firing channel (16).
6. Agencement selon l'une des revendications précédentes, dans lequel le lien (18) est un câble de section ronde réalisé en fibres synthétiques.  6. Arrangement according to one of the preceding claims, wherein the link (18) is a round section of cable made of synthetic fibers.
EP11711278A 2010-03-24 2011-03-23 Inflatable airbag flap hinged to a dashboard by means of a link configured to release an additional length of link upon the opening of the flap Withdrawn EP2550183A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1052135A FR2957871B1 (en) 2010-03-24 2010-03-24 INFLATABLE SAFETY CUSHION COMPONENT JOINED ON A DASHBOARD BY AN AGENCY LINK TO RELEASE AN ADDITIONAL LENGTH OF LINK ON OPENING THIS COMPONENT
PCT/EP2011/001442 WO2011116948A1 (en) 2010-03-24 2011-03-23 Inflatable airbag flap hinged to a dashboard by means of a link configured to release an additional length of link upon the opening of the flap

Publications (1)

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EP2550183A1 true EP2550183A1 (en) 2013-01-30

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EP11711278A Withdrawn EP2550183A1 (en) 2010-03-24 2011-03-23 Inflatable airbag flap hinged to a dashboard by means of a link configured to release an additional length of link upon the opening of the flap

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Country Link
US (1) US8602446B2 (en)
EP (1) EP2550183A1 (en)
FR (1) FR2957871B1 (en)
WO (1) WO2011116948A1 (en)

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Also Published As

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FR2957871B1 (en) 2012-04-20
WO2011116948A1 (en) 2011-09-29
FR2957871A1 (en) 2011-09-30
US20130193674A1 (en) 2013-08-01
US8602446B2 (en) 2013-12-10

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