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EP2379373A1 - Hinge arrangement for airbag flap hinged on a dashboard - Google Patents

Hinge arrangement for airbag flap hinged on a dashboard

Info

Publication number
EP2379373A1
EP2379373A1 EP10700573A EP10700573A EP2379373A1 EP 2379373 A1 EP2379373 A1 EP 2379373A1 EP 10700573 A EP10700573 A EP 10700573A EP 10700573 A EP10700573 A EP 10700573A EP 2379373 A1 EP2379373 A1 EP 2379373A1
Authority
EP
European Patent Office
Prior art keywords
dashboard
flap
linear
links
contour
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Withdrawn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
EP10700573A
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 EP2379373A1 publication Critical patent/EP2379373A1/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Withdrawn legal-status Critical Current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
    • 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
    • B60R2021/21537—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 characterised by hinges

Definitions

  • the invention relates to the mounting of a flap equipping an opening of a dashboard body of a motor vehicle, this flap masking an airbag mounted on the rear face of this dashboard.
  • the dashboard which is located in the cockpit below the windshield, comprises a board body having a rear face carrying an airbag module comprising a chamber enclosing the cushion and its means. inflation, facing the corresponding opening of the dashboard body.
  • the opening which is generally rectangular is closed by one or two flaps, each of which comprises an articulated edge on a corresponding transverse edge of this opening.
  • a firing channel forming a spacer is interposed between the air bag module and the rear face of the dashboard body.
  • each flap and the body of the dashboard is a substantially continuous convex surface. It can be covered with a coating formed of foam itself covered by a skin, to make the shutter almost invisible to an occupant of the vehicle.
  • the cushion When a shock is detected, the cushion inflates automatically, so that it exerts pressure on the inner face of the flap, thus causing it to open,
  • SUBSTITUTE SHEET (RULE 26) cushion take place in a time that must be short enough to protect the occupant of the vehicle by avoiding that his head hits the dashboard or the windshield under the impact. Inflation of the cushion thus causes an opening of the flap which is itself very fast, so that the free edge of this flap is in fact stopped in its opening movement by the windshield that it usually comes crashing.
  • the flap is for example flexible so as to absorb the energy of the shock not to break the windshield. This component is thus less thick than the rest of the dashboard while being articulated on it.
  • the edge of the flap can be secured to the edge of the opening of the dashboard by an additional plastic strip injected into the thickness of the flap and the dashboard body. However, it turns out that when the strip is injected hot, it is too soft, and when it is injected cold, it is too fragile.
  • the hinge may also be formed by a textile thread overmolded to the inner face of the flap and the dashboard body, but in practice the cohesion between the textile net and the inner face is not sufficient given the intensity of the efforts at stake during the opening.
  • the hinge may also be in the form of a metallic shutter reinforcement, a portion of which is fixed to the dashboard body. But here too, the connection of the metal reinforcement with the dashboard body is not strong enough, and anyway, the set has too much weight.
  • OBJECT OF THE INVENTION The object of the invention is to propose a solution to overcome the above disadvantages. SUMMARY OF THE INVENTION
  • the invention relates to a dashboard body of a motor vehicle, comprising an opening closed by a flap, the opening and the flap being both delimited by a generally rectangular contour, the flap being adapted to s open to allow the deployment of an airbag, characterized in that it also comprises one or linear links fixed to one face of the dashboard body and the flap, such that portions of linear links overlap a portion of the contour oriented transversely to the vehicle on which the dashboard is intended to be mounted, to constitute or strengthen a hinge by which the flap is hinged to the dashboard body.
  • linear links are thus secured locally to the shutter and to the board body, which makes it possible to better control their fastening. Moreover, these links can be optimally distributed vis-à-vis the distribution of efforts at the opening of the shutter. This results in better strength of the hinge thus formed, for a reduced manufacturing cost.
  • the invention also relates to a dashboard body as defined above, comprising fastening tabs overmolded on the linear links, the linear links being fixed to the body of the dashboard and / or the shutter via of these paws.
  • the fixing lugs make it possible to optimize the quality of the joining of each linear link to the board body and to the flap, this fastening being able for example to be provided by ultrasonic plastic welding.
  • the invention also relates to a dashboard body as defined above, comprising at least one fastening lug overmolded on at least two linear links.
  • the invention also relates to a dashboard body as defined above, comprising at least one linear link fixed to the dashboard body or the flap by means of two tabs overmolded on this linear link, these two lugs being superimposed and fixed to each other, one of these tabs being attached to the dashboard body or flap.
  • the superposition of several legs makes it possible to further improve the cohesion between the linear links and the board body and / or the flap.
  • the invention also relates to a dashboard body as defined above, comprising at least one linear link arranged in a generally annular disposition.
  • the invention also relates to a dashboard body as defined above, comprising a linear link of which a portion overlaps a lateral part of the contour, this lateral part being oriented longitudinally with respect to the vehicle on which the dashboard is intended. to be mounted, this linear link portion being loose at the lateral portion of the contour that it overlaps so as to constitute a linear restraint link limiting the opening amplitude of the flap.
  • the invention also relates to a dashboard body as defined above, comprising two portions of linear retaining links overlapping all two same side part of the contour, and wherein these two portions of linear links are crossed on one another.
  • the crossed linear links Thanks to the crossed linear links, the surface through which the airbag can be deployed is increased laterally, allowing a better lateral deployment of the flap. Moreover, the two lateral retaining links thus have substantially the same length, which simplifies their dimensioning in terms of mechanical strength at break.
  • the invention also relates to a dashboard body as defined above, comprising a single linear link arranged to comprise on the one hand several portions each overlapping a transverse portion of the contour, and on the other hand several portions each overlapping a lateral part of the contour.
  • the invention also relates to a dashboard body as defined above, wherein each linear link is fixed to the rear face of the flap being engaged in a channel provided for this purpose, and in which this channel is covered by a plate having one or more ribs oriented perpendicular to the linear link.
  • the invention also relates to a dashboard body as defined above, comprising two to six portions of links for constituting or reinforcing a hinge whereby the flap is hinged to the dashboard body.
  • Figure 1 shows in rear view a first embodiment of the invention comprising a plurality of distinct linear links perpendicular to the joint and which are fixed to the flap and the dashboard by means of tabs overmolded at their ends;
  • Figure 2 shows in side view an example of overmolded tab at one end of a linear link to attach it to the flap or the body of the dashboard;
  • FIG. 3 shows in side view another example in which two tabs are overmolded at the same end of a linear link to fix it to the shutter or to the body of the dashboard by means of these two tabs folded one over the other ;
  • FIG. 4 shows in a rear view a second embodiment of the invention in which two linear links are attached directly to the rear face of the flap and the dashboard body in generally annular arrangements;
  • FIG. 5 shows in a rear view a third embodiment of the invention in which four linear links are attached to the rear face of the flap and the dashboard body by means of overmoulded lugs to constitute both the hinge the shutter and the means of restraint of this shutter;
  • FIG. 6 shows a variant of the third embodiment of the invention in which the hinge consists of four linear links instead of two;
  • FIG. 7 shows in a rear view a fourth embodiment of the invention in which a single linear link is directly attached to the rear face of the shutter and the body of the dashboard to constitute both the shutter hinge and the means of restraint of this component;
  • Figure 8 is a local sectional view of the shutter of the fourth embodiment of the invention showing a reinforcing structure avoiding tearing of the flap by the linear link when opening the flap.
  • a dashboard marked generally by 1 comprises a board body 2 whose rear face comprises a generally rectangular contour 3 delimiting a passage opening of a not shown airbag, this opening being closed by a flap marked by 4.
  • This rear face corresponds to the internal face of the dashboard body, that is to say to that which is oriented towards the ground and toward the front of the vehicle, as opposed to its outer or front face which is directed towards the top and towards the occupants of the vehicle.
  • the rectangular contour 3 has two parts 6 and 7, corresponding to opposite sides, which are oriented transversely to the direction of advance of the vehicle on which the dashboard 1 is intended to be mounted. It comprises two other parts 8 and 9, corresponding to its two other opposite sides, which are oriented longitudinally with respect to the direction of travel of the vehicle.
  • the flap 4 is designed to open when the airbag not shown is deployed, pivoting about a transverse axis AX coinciding with the transverse portion 6 of the contour 3.
  • the parts 7, 8 and 9 of the contour 3 which respectively correspond to the free edge of the flap 4 and to its lateral edges, are pre-cuts or cuts that can pass through part or all of the thickness of the board on board.
  • Part 6 coinciding with the hinge axis AX around which the flap rotates may also be in the form of a precut, a cut, or a reduction in thickness of the body of the dashboard.
  • the shutter can thus be, as the case may be, a part completely separate from the rest of the body of the dashboard, or on the contrary, be manufactured in the same material as the rest of the dashboard body.
  • the flap is simply delimited by the contour and it possibly has a thickness less than that of the rest of the dashboard body so as to have greater flexibility.
  • the cuts or pre-cuts constituting the rectangular outline may be obtained with cutting tools or the like, but they may also result completely or partially from the molding operation of the dashboard body.
  • the hinge by which the flap 4 is hinged to the rest of the dashboard body 2 around the axis AX comprises a set of linear links, marked by 11 to 14, which are fixed to the face rear and / or front of the dashboard body 2 and the flap 4 and which cross or overlap the portion of the transverse contour 6 which coincides with the axis AX.
  • each linear link 11 to 14 comprises two tabs overmolded at each of its ends, and by which it is fixed on the one hand to the body of the dashboard 2 and on the other hand to the flap 4.
  • the tabs overmolded at the ends of the linear links which are fixed to the body of the dashboard are marked by 11a to 14a, while the tabs corresponding to the ends of the linear links which are fixed to the flap 4 are indicated by 11b to 14b.
  • the tabs 11a to 14a and 11b to 14b each have a generally parallelepipedal flat shape. They constitute mounting plates made of a plastic type material that can be firmly attached to the body of the dashboard 2 and the flap 4 by example by vibration or ultrasonic welding, gluing or other.
  • the square and individual lla-14a tabs may be in the form of a single rectangular tab 10 shown in dashed lines in Figure 1, and which is overmolded on the first ends of the links 11-14.
  • the tabs 11b-14b can also be reduced to a single rectangular tab 15 overmolded on the second ends of the links 11-14.
  • the linear links 11 to 14 reinforce the resistance of the hinge AX so as to ensure that the flap 4 does not separate from the rest of the dashboard body 2. During this opening, the linear links 11 to 14 are thus subjected to efforts all the higher as the swelling of the cushion occurs quickly.
  • another tab 18 may also be overmolded on the same linear link 17, being slightly spaced from the tab 16 along this link, as shown in Figure 3.
  • the first tab 16 is folded down and attached to one side of the second leg 18, and the other side of the tab is then attached directly to a face of the dashboard body or the flap.
  • the tabs are fixed to the rear face of the flap and the dashboard body by vibration or ultrasonic welding or any other method adapted to the plastics used for these tabs, the flap and the dashboard body.
  • the linear links can be fixed directly to the rear faces of the flap and the dashboard body, as illustrated in the example of Figure 4, where the flap marked by 24 is delimited by a contour 23, a transverse portion 26 coincides with the hinge axis AX around which this flap turns to open.
  • Two linear links 28 and 29 arranged in generally annular arrangements, here rectangular, overlapping the portion 26 are then fixed directly to the rear face of the dashboard body 22 and the flap 24 so as to extend on either side of the portion 26 to strengthen the connection at the hinge AX.
  • the linear links which are fixed to the rear face of the board body and the flap comprise portions overlapping the transverse edge coinciding with the pivot axis AX of the flap. But these linear links can also extend beyond this region to overlap the lateral portions of this contour, so as to also constitute retaining means of the flap opening, as in the examples of the figures.
  • the instrument panel 31 comprises a body 32 provided with an outline 33 delimiting an opening closed by a flap 34.
  • the contour 33 is generally rectangular and comprises two opposite transverse portions 36 and 38, one of which, namely the portion 36 coincides with the axis AX of rotation of the flap, and two other lateral portions 38 and 39 oriented longitudinally with respect to the vehicle on which the dashboard is intended to be mounted.
  • linear links 41 and 42 each having a portion 43, 44 overlap the portion 36 of the contour 33 to be fixed on either side of this contour portion.
  • the linear link 41 is fixed by means of two tabs 41a and 41b overmolded on this linear link and which are themselves fixed to the flap 34 and to the dashboard body 32.
  • linear link 42 is fixed to the board body and to the flap respectively by a tab 42a and by another tab 42b both overmolded on this link.
  • each linear link 41, 42 extends beyond the tab 41b, 42b fixed to the flap, to rejoin the dashboard body 32 by overlapping a corresponding lateral portion 38, 39 of the contour 33.
  • Each of these two linear links 41, 42 thus comprises a portion 46, 47 overlapping a corresponding lateral portion 38, 39 of the contour 33, and each of these two linear links is fixed to the dashboard 32 by an additional lug 41c, 42c.
  • the portion 46, 47 overlapping the corresponding lateral portion 38, 39 of the contour is thus fixed on either side of the contour, on the one hand by the tabs 41b fixed to the flap and on the other hand by the tabs 41c and 42c fixed to the dashboard.
  • Two other linear links 48 and 49 extend from the flap to the body of the dashboard, each having a portion 51, 52 respectively overlapping the side portions 38 and 39, and being fixed on either side of these parts.
  • laterals 38, 39 by molded tabs bearing the references 48b, 48c, 49b, 49c. As visible in the figures, the tabs 41b,
  • the portions of the linear links overlapping the lateral parts of the outline are loose, so as to allow the movement of the flap, and they also have a length adjusted to limit this opening of the flap to prevent it can hit the windshield.
  • the cross arrangement of the linear retaining links of the flap ensures the retention of the flap without unnecessarily reducing the surface that the cushion crosses to deploy.
  • the linear retaining links located on the sides of the flap because of their cross arrangement, do not constitute an obstacle to the deployment of the cushion in the lateral directions.
  • the additional linear links 48 and 49 can also extend as far as the dashboard body to each comprise a portion 53, 54 overlapping the transverse portion 36 of the contour 33 coinciding with the AX axis.
  • the four linear links 41, 42 and 48, 49 define on the one hand four portions located at the joint AX which they stiffen, and on the other hand two portions crossed for each lateral edge of the shutter and intended to retain the opening movement of this flap.
  • a single linear link directly fixed to the rear face of the flap and the board body is arranged in such a way that it comprises four portions overlapping the part of the flap contour coinciding with its articulation, and that each of the two lateral portions of the contour is overlapped by two portions crossed one on the other forming linear retaining links.
  • the instrument panel 61 comprises a body 62 provided with an outline 63 delimiting an opening closed by a flap 64.
  • the contour 63 is generally rectangular and has two opposite transverse parts 66 and 67, one of which, namely the part 66 coincides with the axis AX of rotation of the flap, and two other lateral parts 68 and 69 oriented longitudinally with respect to the vehicle on which the dashboard is intended to be mounted.
  • the linear link that is marked by 70 is disposed at the transverse portion 66 in a series of corrugations to include four portions 71 to 74 overlapping the transverse portion 66 of the contour 63. Complementarily, it is disposed at the side portion. 68 to define two portions 76 and 77 crossed over each other and overlapping this lateral portion 68, and it is arranged at the other lateral portion 63 in two other portions 78 and 79 crossed one on the other and overlapping this other lateral part 69.
  • the flap 64 may be provided with a reinforcement 82 at its rear face including a channel 81.
  • the linear link 70 is engaged in the channel 81 to which it can be fixed by ultrasonic welding or other.
  • the reinforcement comprises external ribs 83 oriented perpendicular to the direction of the link to prevent the reinforcement is torn by the linear link under the effect of the pressure exerted by the airbag during its deployment.
  • the linear links used advantageously have a round or oval section and contain polyaramid and / or polyester fiber, which allows a similar operation at all temperatures, in terms of resistance. mechanical stress.
  • Each link advantageously has a breaking strength greater than one hundred fifty daN, or even three hundred daN and preferably five hundred daN. The elongation at break is less than twenty-five percent, even fifteen percent, and preferably ten percent.
  • Each link advantageously has a breaking strength greater than one hundred and fifty daN, and advantageously greater than five hundred daN or even three hundred daN.
  • the elongation at three hundred daN is less than twenty-five percent, and is preferably ten percent or even fifteen percent.
  • linear links are attached to the rear face of the board body and the flap, but they can also be attached to the front face, being concealed by the foam and the skin constituting the outer coating of the dashboard.

Landscapes

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

Abstract

The invention relates to a hinge arrangement for an airbag flap hinged on a dashboard. The dashboard body of an automobile (1) includes an opening closed by a flap (4), the opening and the flap both being defined by a generally rectangular outline (3), the flap being capable of opening for enabling the expansion of an airbag. The invention also comprises one or more linear links (11-14) attached to a face of the dashboard body so that portions (43, 44) of the linear links overlap an outline portion (6) extending transversally relative to the vehicle on which said dashboard is to be mounted in order to define or reinforce a hinge (AX) through which the flap is hinged on the dashboard body. The invention pertains to automotive safety.

Description

Agencement de charnière de volet de coussin de sécurité gonflable articulé sur une planche de bord. An airbag flap hinge arrangement hinged to a dashboard.
L'invention concerne le montage d'un volet équipant une ouverture d'un corps de planche de bord d'un véhicule automobile, ce volet masquant un coussin de sécurité gonflable porté en face arrière de cette planche de bord.The invention relates to the mounting of a flap equipping an opening of a dashboard body of a motor vehicle, this flap masking an airbag mounted on the rear face of this dashboard.
ARRIERE PLAN DE L' INVENTIONBACKGROUND OF THE INVENTION
Dans un tel agencement, la planche de bord, qui est située dans l'habitacle au dessous du pare-brise, comprend un corps de planche ayant une face arrière portant un module de coussin de sécurité gonflable comprenant une enceinte renfermant le coussin et ses moyens de gonflage, face à l'ouverture correspondante de ce corps de planche de bord.In such an arrangement, the dashboard, which is located in the cockpit below the windshield, comprises a board body having a rear face carrying an airbag module comprising a chamber enclosing the cushion and its means. inflation, facing the corresponding opening of the dashboard body.
L'ouverture qui est généralement rectangulaire est fermée par un ou deux volets, qui comprennent chacun un bord articulé sur un bord transversal correspondant de cette ouverture. Un canal de tir, formant entretoise, est interposé entre le module de coussin de sécurité, et la face arrière du corps de planche de bord.The opening which is generally rectangular is closed by one or two flaps, each of which comprises an articulated edge on a corresponding transverse edge of this opening. A firing channel forming a spacer is interposed between the air bag module and the rear face of the dashboard body.
La face avant de chaque volet et du corps de la planche de bord constituent une surface bombée sensiblement continue. Elle peut être recouverte d'un revêtement formé de mousse elle-même recouverte par une peau, pour rendre le volet à peu près invisible pour un occupant du véhicule.The front face of each flap and the body of the dashboard is a substantially continuous convex surface. It can be covered with a coating formed of foam itself covered by a skin, to make the shutter almost invisible to an occupant of the vehicle.
Lorsqu'un choc est détecté, le coussin se gonfle automatiquement, de sorte qu'il exerce une pression à la face interne du volet, provoquant ainsi son ouverture, àWhen a shock is detected, the cushion inflates automatically, so that it exerts pressure on the inner face of the flap, thus causing it to open,
1' encontre du revêtement qui se déchire. Ceci permet au coussin de se déployer à travers la planche de bord, vers l'habitacle, de manière à s'interposer entre un occupant du véhicule et la planche de bord. L'ouverture du volet et le gonflage complet duAgainst the coating that is torn. This allows the cushion to deploy through the dashboard to the passenger compartment, so as to interpose between a vehicle occupant and the dashboard. The opening of the shutter and the complete inflation of the
FEUILLE DE REMPLACEMENT (RÈGLE 26) coussin se déroulent dans un temps qui doit être suffisamment court pour protéger l'occupant du véhicule en évitant que sa tête ne heurte la planche de bord ou le pare brise sous l'effet du choc. Le gonflage du coussin provoque ainsi une ouverture du volet qui est elle-même très rapide, de sorte que le bord libre de ce volet est en fait arrêté dans son mouvement d'ouverture par le pare brise qu'il vient généralement heurter. Afin d'éviter la destruction du pare-brise, le volet est par exemple prévu souple de manière à absorber l'énergie du choc pour ne pas casser le pare-brise. Ce volet est ainsi moins épais que le reste de la planche de bord tout en étant articulé sur celle-ci. Dans ce cadre, le bord du volet peut être solidarisé au bord de l'ouverture de la planche de bord par une bande en matière plastique additionnelle injectée dans l'épaisseur du volet et du corps de planche de bord. Cependant, il s'avère que lorsque la bande est injectée à chaud, elle est trop souple, et que lorsqu'elle est injectée à froid, elle est trop fragile.SUBSTITUTE SHEET (RULE 26) cushion take place in a time that must be short enough to protect the occupant of the vehicle by avoiding that his head hits the dashboard or the windshield under the impact. Inflation of the cushion thus causes an opening of the flap which is itself very fast, so that the free edge of this flap is in fact stopped in its opening movement by the windshield that it usually comes crashing. In order to avoid the destruction of the windshield, the flap is for example flexible so as to absorb the energy of the shock not to break the windshield. This component is thus less thick than the rest of the dashboard while being articulated on it. In this context, the edge of the flap can be secured to the edge of the opening of the dashboard by an additional plastic strip injected into the thickness of the flap and the dashboard body. However, it turns out that when the strip is injected hot, it is too soft, and when it is injected cold, it is too fragile.
La charnière peut aussi être formée par un filet textile surmoulé à la face interne du volet et du corps de planche de bord, mais en pratique la cohésion entre le filet textile et la face interne n'est pas suffisante compte tenu de l'intensité des efforts en jeu lors de 1 ' ouverture .The hinge may also be formed by a textile thread overmolded to the inner face of the flap and the dashboard body, but in practice the cohesion between the textile net and the inner face is not sufficient given the intensity of the efforts at stake during the opening.
La charnière peut aussi se présenter sous la forme d'un renfort de volet métallique dont une partie est fixée au corps de planche de bord. Mais là aussi, la liaison du renfort métallique avec le corps de planche de bord n'est pas suffisamment résistante, et quoi qu'il en soit, l'ensemble a un poids trop important. OBJET DE L'INVENTION Le but de l'invention est de proposer une solution pour remédier aux inconvénients ci-dessus. RESUME DE L'INVENTIONThe hinge may also be in the form of a metallic shutter reinforcement, a portion of which is fixed to the dashboard body. But here too, the connection of the metal reinforcement with the dashboard body is not strong enough, and anyway, the set has too much weight. OBJECT OF THE INVENTION The object of the invention is to propose a solution to overcome the above disadvantages. SUMMARY OF THE INVENTION
A cet effet, l'invention a pour objet un corps de planche de bord de véhicule automobile, comprenant une ouverture fermée par un volet, l'ouverture et le volet étant tous deux délimités par un contour généralement rectangulaire, le volet étant apte à s'ouvrir pour permettre le déploiement d'un coussin de sécurité gonflable, caractérisé en ce qu'il comporte également un ou des liens linéaires fixés à une face du corps de planche de bord et du volet, de telle manière que des portions de liens linéaires chevauchent une partie du contour orientée transversalement par rapport au véhicule sur lequel la planche de bord est destinée à être montée, pour constituer ou renforcer une charnière par laquelle le volet est articulé sur le corps de planche de bord.For this purpose, the invention relates to a dashboard body of a motor vehicle, comprising an opening closed by a flap, the opening and the flap being both delimited by a generally rectangular contour, the flap being adapted to s open to allow the deployment of an airbag, characterized in that it also comprises one or linear links fixed to one face of the dashboard body and the flap, such that portions of linear links overlap a portion of the contour oriented transversely to the vehicle on which the dashboard is intended to be mounted, to constitute or strengthen a hinge by which the flap is hinged to the dashboard body.
Les liens linéaires sont ainsi solidarisés localement au volet et au corps de planche, ce qui permet de mieux maîtriser leur fixation. Par ailleurs, ces liens peuvent être répartis de façon optimale vis-à-vis de la distribution des efforts lors de l'ouverture du volet. Il en résulte une meilleure résistance de la charnière ainsi constituée, pour un coût de fabrication réduit.The linear links are thus secured locally to the shutter and to the board body, which makes it possible to better control their fastening. Moreover, these links can be optimally distributed vis-à-vis the distribution of efforts at the opening of the shutter. This results in better strength of the hinge thus formed, for a reduced manufacturing cost.
L'invention concerne également un corps de planche de bord tel que défini ci-dessus, comportant des pattes de fixation surmoulées sur les liens linéaires, les liens linéaires étant fixés au corps de la planche de bord et/ou au volet par l'intermédiaire de ces pattes.The invention also relates to a dashboard body as defined above, comprising fastening tabs overmolded on the linear links, the linear links being fixed to the body of the dashboard and / or the shutter via of these paws.
Les pattes de fixation permettent d'optimiser la qualité de la solidarisation de chaque lien linéaire au corps de planche et au volet, cette fixation pouvant par exemple être assurée par soudure plastique à ultrasons.The fixing lugs make it possible to optimize the quality of the joining of each linear link to the board body and to the flap, this fastening being able for example to be provided by ultrasonic plastic welding.
L'invention concerne également un corps de planche de bord tel que défini ci-dessus, comportant au moins une patte de fixation surmoulée sur au moins deux liens linaire.The invention also relates to a dashboard body as defined above, comprising at least one fastening lug overmolded on at least two linear links.
Le nombre total de pattes de fixation peut ainsi être réduit significativement de manière à limiter le coût de production. L'invention concerne également un corps de planche de bord tel que défini ci-dessus, comportant au moins un lien linéaire fixé au corps de planche de bord ou au volet au moyen de deux pattes surmoulées sur ce lien linéaire, ces deux pattes étant superposées et fixées l'une à l'autre, l'une de ces pattes étant fixée au corps de planche de bord ou au volet.The total number of fixing lugs can thus be significantly reduced so as to limit the cost of production. The invention also relates to a dashboard body as defined above, comprising at least one linear link fixed to the dashboard body or the flap by means of two tabs overmolded on this linear link, these two lugs being superimposed and fixed to each other, one of these tabs being attached to the dashboard body or flap.
La superposition de plusieurs pattes permet d'améliorer encore la cohésion entre les liens linéaires et le corps de planche et/ou le volet. L'invention concerne également un corps de planche de bord tel que défini ci-dessus, comportant au moins un lien linéaire agencé selon une disposition généralement annulaire.The superposition of several legs makes it possible to further improve the cohesion between the linear links and the board body and / or the flap. The invention also relates to a dashboard body as defined above, comprising at least one linear link arranged in a generally annular disposition.
L'invention concerne également un corps de planche de bord tel que défini ci-dessus, comportant un lien linéaire dont une portion chevauche une partie latérale du contour, cette partie latérale étant orientée longitudinalement par rapport au véhicule sur lequel la planche de bord est destinée à être montée, cette portion de lien linéaire étant lâche au niveau de la partie latérale du contour qu'elle chevauche de manière à constituer un lien linéaire de retenue limitant l'amplitude d'ouverture du volet.The invention also relates to a dashboard body as defined above, comprising a linear link of which a portion overlaps a lateral part of the contour, this lateral part being oriented longitudinally with respect to the vehicle on which the dashboard is intended. to be mounted, this linear link portion being loose at the lateral portion of the contour that it overlaps so as to constitute a linear restraint link limiting the opening amplitude of the flap.
Grâce aux liens linéaires de retenue, on peut assurer que le volet ne heurte pas le pare-brise lors de l'ouverture, ce qui procure une plus grande liberté quant au matériau et à la structure mécanique du volet en soi.Thanks to the linear restraint links, it can be ensured that the flap does not strike the windshield during opening, which gives greater freedom to the material and to the mechanical structure of the flap itself.
L'invention concerne également un corps de planche de bord tel que défini ci-dessus, comportant deux portions de liens linéaires de retenue chevauchant toutes deux une même partie latérale du contour, et dans lequel ces deux portions de liens linéaires sont croisées l'une sur l'autre.The invention also relates to a dashboard body as defined above, comprising two portions of linear retaining links overlapping all two same side part of the contour, and wherein these two portions of linear links are crossed on one another.
Grâce aux liens linéaires croisés, la surface à travers laquelle le coussin gonflable peut se déployée est accrue latéralement, permettant un meilleur déploiement latéral du volet. Par ailleurs, les deux liens latéraux de retenue ont ainsi sensiblement la même longueur, ce qui simplifie leur dimensionnement en termes de résistance mécanique à la rupture.Thanks to the crossed linear links, the surface through which the airbag can be deployed is increased laterally, allowing a better lateral deployment of the flap. Moreover, the two lateral retaining links thus have substantially the same length, which simplifies their dimensioning in terms of mechanical strength at break.
L'invention concerne également un corps de planche de bord tel que défini ci-dessus, comportant un lien linéaire unique agencé pour comporter d'une part plusieurs portions chevauchant chacune une partie transversale du contour, et d'autre part plusieurs portions chevauchant chacune une partie latérale du contour .The invention also relates to a dashboard body as defined above, comprising a single linear link arranged to comprise on the one hand several portions each overlapping a transverse portion of the contour, and on the other hand several portions each overlapping a lateral part of the contour.
L'invention concerne également un corps de planche de bord tel que défini ci-dessus, dans lequel chaque lien linéaire est fixé à la face arrière du volet en étant engagé dans une rigole prévue à cet effet, et dans lequel cette rigole est recouverte par une plaque présentant une ou des nervures orientées perpendiculairement au lien linéaire. L'invention concerne également un corps de planche de bord tel que défini ci-dessus, comportant deux à six portions de liens pour constituer ou renforcer une charnière par laquelle le volet est articulé sur le corps de planche de bord. BREVE DESCRIPTION DES FIGURESThe invention also relates to a dashboard body as defined above, wherein each linear link is fixed to the rear face of the flap being engaged in a channel provided for this purpose, and in which this channel is covered by a plate having one or more ribs oriented perpendicular to the linear link. The invention also relates to a dashboard body as defined above, comprising two to six portions of links for constituting or reinforcing a hinge whereby the flap is hinged to the dashboard body. BRIEF DESCRIPTION OF THE FIGURES
La figure 1 montre en vue arrière un premier mode de réalisation de l'invention comportant plusieurs liens linéaires distincts perpendiculaires à l'articulation et qui sont fixés au volet et à la planche de bord par l'intermédiaire de pattes surmoulées à leurs extrémités ; La figure 2 montre en vue latérale un exemple de patte surmoulée à une extrémité d'un lien linéaire pour le fixer au volet ou au corps de la planche de bord ;Figure 1 shows in rear view a first embodiment of the invention comprising a plurality of distinct linear links perpendicular to the joint and which are fixed to the flap and the dashboard by means of tabs overmolded at their ends; Figure 2 shows in side view an example of overmolded tab at one end of a linear link to attach it to the flap or the body of the dashboard;
La figure 3 montre en vue latérale un autre exemple dans lequel deux pattes sont surmoulées à une même extrémité d'un lien linéaire pour le fixer au volet ou au corps de planche de bord grâce à ces deux pattes rabattues l'une sur l'autre ;FIG. 3 shows in side view another example in which two tabs are overmolded at the same end of a linear link to fix it to the shutter or to the body of the dashboard by means of these two tabs folded one over the other ;
La figure 4 montre en vue arrière un deuxième mode de réalisation de l'invention dans lequel deux liens linéaires sont rapportés directement à la face arrière du volet et du corps de planche de bord selon des dispositions généralement annulaires ;FIG. 4 shows in a rear view a second embodiment of the invention in which two linear links are attached directly to the rear face of the flap and the dashboard body in generally annular arrangements;
La figure 5 montre en vue arrière un troisième mode de réalisation de l'invention dans lequel quatre liens linéaires sont fixés à la face arrière du volet et du corps de planche de bord par l'intermédiaire de pattes surmoulées pour constituer à la fois la charnière du volet et des moyens de retenue de ce volet ; La figure 6 montre une variante du troisième mode de réalisation de l'invention dans lequel la charnière est constituée de quatre liens linéaires au lieu de deux ;FIG. 5 shows in a rear view a third embodiment of the invention in which four linear links are attached to the rear face of the flap and the dashboard body by means of overmoulded lugs to constitute both the hinge the shutter and the means of restraint of this shutter; FIG. 6 shows a variant of the third embodiment of the invention in which the hinge consists of four linear links instead of two;
La figure 7 montre en vue arrière un quatrième mode de réalisation de l'invention dans lequel un unique lien linéaire est directement fixé à la face arrière du volet et du corps de la planche de bord pour constituer à la fois la charnière du volet et les moyens de retenue de ce volet ; La figure 8 est une vue locale en coupe du volet du quatrième mode de réalisation de l'invention faisant apparaître une structure de renfort évitant un déchirement du volet par le lien linéaire lors de l'ouverture de ce volet. DESCRIPTION DETAILLEE DE L'INVENTION Dans la figure 1, une planche de bord repérée généralement par 1 comporte un corps de planche 2 dont la face arrière comprend un contour 3 généralement rectangulaire délimitant une ouverture de passage d'un coussin gonflable de sécurité non représenté, cette ouverture étant fermée par un volet repéré par 4.FIG. 7 shows in a rear view a fourth embodiment of the invention in which a single linear link is directly attached to the rear face of the shutter and the body of the dashboard to constitute both the shutter hinge and the means of restraint of this component; Figure 8 is a local sectional view of the shutter of the fourth embodiment of the invention showing a reinforcing structure avoiding tearing of the flap by the linear link when opening the flap. DETAILED DESCRIPTION OF THE INVENTION In FIG. 1, a dashboard marked generally by 1 comprises a board body 2 whose rear face comprises a generally rectangular contour 3 delimiting a passage opening of a not shown airbag, this opening being closed by a flap marked by 4.
Cette face arrière correspond à la face interne du corps de planche de bord, c'est-à-dire à celle qui est orientée vers le sol et vers l'avant du véhicule, par opposition à sa face externe ou avant qui est orientée vers le haut et vers les occupants du véhicule.This rear face corresponds to the internal face of the dashboard body, that is to say to that which is oriented towards the ground and toward the front of the vehicle, as opposed to its outer or front face which is directed towards the top and towards the occupants of the vehicle.
Le contour rectangulaire 3 comporte deux parties 6 et 7, correspondant à des côtés opposés, qui sont orientées transversalement par rapport à la direction d'avancement du véhicule sur lequel la planche de bord 1 est destinée à être montée. Il comprend deux autres parties 8 et 9, correspondant à ses deux autres côtés opposés, qui sont orientées longitudinalement par rapport à la direction d'avancement du véhicule. Le volet 4 est prévu pour s'ouvrir lorsque le coussin gonflable non représenté se déploie, en pivotant autour d'un axe transversal AX coïncidant avec la partie transversale 6 du contour 3.The rectangular contour 3 has two parts 6 and 7, corresponding to opposite sides, which are oriented transversely to the direction of advance of the vehicle on which the dashboard 1 is intended to be mounted. It comprises two other parts 8 and 9, corresponding to its two other opposite sides, which are oriented longitudinally with respect to the direction of travel of the vehicle. The flap 4 is designed to open when the airbag not shown is deployed, pivoting about a transverse axis AX coinciding with the transverse portion 6 of the contour 3.
A cet effet, les parties 7, 8 et 9 du contour 3 qui correspondent respectivement au bord libre du volet 4 et à ses bords latéraux, sont des pré découpes ou des découpes pouvant traverser une partie ou la totalité de l'épaisseur de la planche de bord. La partie 6 coïncidant avec l'axe AX d'articulation autour duquel tourne le volet peut également se présenter sous forme d'une prédécoupe, d'une découpe, ou bien d'une réduction d'épaisseur du corps de la planche de bord.For this purpose, the parts 7, 8 and 9 of the contour 3 which respectively correspond to the free edge of the flap 4 and to its lateral edges, are pre-cuts or cuts that can pass through part or all of the thickness of the board on board. Part 6 coinciding with the hinge axis AX around which the flap rotates may also be in the form of a precut, a cut, or a reduction in thickness of the body of the dashboard.
Le volet peut ainsi, selon le cas, être une pièce complètement distincte du reste du corps de la planche de bord, ou bien au contraire, être fabriqué dans le même matériau que le reste du corps de planche de bord. Dans ce dernier cas, le volet est simplement délimité par le contour et il a éventuellement une épaisseur inférieure à celle du reste du corps de planche de bord de manière à présenter une plus grande souplesse.The shutter can thus be, as the case may be, a part completely separate from the rest of the body of the dashboard, or on the contrary, be manufactured in the same material as the rest of the dashboard body. In the latter case, the flap is simply delimited by the contour and it possibly has a thickness less than that of the rest of the dashboard body so as to have greater flexibility.
Les découpes ou pré découpes constituant le contour rectangulaire peuvent selon le cas être obtenues avec des outils coupants ou autres, mais elles peuvent également résulter complètement ou partiellement de l'opération de moulage du corps de planche de bord.The cuts or pre-cuts constituting the rectangular outline may be obtained with cutting tools or the like, but they may also result completely or partially from the molding operation of the dashboard body.
Selon l'invention, la charnière par laquelle le volet 4 est articulé sur le reste du corps de planche de bord 2 autour de l'axe AX, comporte un ensemble de liens linéaires, repérés par 11 à 14, qui sont fixés à la face arrière et/ou avant du corps de planche de bord 2 et du volet 4 et qui traversent ou chevauchent la partie de contour 6 transversale qui coïncide avec l'axe AX.According to the invention, the hinge by which the flap 4 is hinged to the rest of the dashboard body 2 around the axis AX, comprises a set of linear links, marked by 11 to 14, which are fixed to the face rear and / or front of the dashboard body 2 and the flap 4 and which cross or overlap the portion of the transverse contour 6 which coincides with the axis AX.
Ces quatre liens linéaires 11 à 14 sont régulièrement répartis le long de la partie 6 rectiligne du contour 3 en s 'étendant perpendiculairement à cette partie rectiligne de manière à la chevaucher.These four linear links 11 to 14 are regularly distributed along the rectilinear portion 6 of the contour 3 extending perpendicularly to this rectilinear part so as to overlap it.
Comme visible dans la figure 1, chaque lien linéaire 11 à 14 comporte deux pattes surmoulées à chacune de ses extrémités, et par lesquelles il est fixé d'une part au corps de la planche de bord 2 et d'autre part au volet 4. Les pattes surmoulées aux extrémités des liens linéaires qui sont fixées au corps de la planche de bord sont repérées par lia à 14a, alors que les pattes correspondent aux extrémités des liens linéaires qui sont fixées au volet 4 sont repérées par 11b à 14b.As can be seen in FIG. 1, each linear link 11 to 14 comprises two tabs overmolded at each of its ends, and by which it is fixed on the one hand to the body of the dashboard 2 and on the other hand to the flap 4. The tabs overmolded at the ends of the linear links which are fixed to the body of the dashboard are marked by 11a to 14a, while the tabs corresponding to the ends of the linear links which are fixed to the flap 4 are indicated by 11b to 14b.
Les pattes lia à 14a et 11b à 14b ont chacune une forme plate généralement parallélépipédique . Elles constituent des platines de fixation fabriquées dans un matériau de type plastique pouvant être fixé solidement au corps de la planche de bord 2 et au volet 4 par exemple par soudure par vibrations ou aux ultrasons, collage ou autre.The tabs 11a to 14a and 11b to 14b each have a generally parallelepipedal flat shape. They constitute mounting plates made of a plastic type material that can be firmly attached to the body of the dashboard 2 and the flap 4 by example by vibration or ultrasonic welding, gluing or other.
Alternativement, les pattes carrées et individuelles lla-14a peuvent se présenter sous forme d'une patte unique rectangulaire 10 représentée en pointillés dans la figure 1, et qui est surmoulée sur les premières extrémités des liens 11-14. De manière analogue, les pattes llb-14b peuvent aussi être ramenées à une unique patte rectangulaire 15 surmoulée sur les deuxièmes extrémités des liens 11-14.Alternatively, the square and individual lla-14a tabs may be in the form of a single rectangular tab 10 shown in dashed lines in Figure 1, and which is overmolded on the first ends of the links 11-14. Similarly, the tabs 11b-14b can also be reduced to a single rectangular tab 15 overmolded on the second ends of the links 11-14.
Lors de l'ouverture du volet, les efforts presseurs exercés par le coussin gonflable à la face arrière du volet 4 provoquent l'ouverture de ce volet, en déchirant le cas échéant les parties 7 à 9 du contour 3 lorsque ce contour est une prédécoupe.When opening the flap, the pressure forces exerted by the airbag on the rear face of the flap 4 cause the opening of this flap, tearing if necessary the parts 7 to 9 of the contour 3 when this contour is a precut .
Durant cette ouverture, les liens linéaires 11 à 14 renforcent la résistance de la charnière AX de manière à assurer que le volet 4 ne se désolidarise pas du reste du corps de planche de bord 2. Durant cette ouverture, les liens linéaires 11 à 14 sont ainsi soumis à des efforts d'autant plus élevés que le gonflement du coussin se produit de façon rapide.During this opening, the linear links 11 to 14 reinforce the resistance of the hinge AX so as to ensure that the flap 4 does not separate from the rest of the dashboard body 2. During this opening, the linear links 11 to 14 are thus subjected to efforts all the higher as the swelling of the cushion occurs quickly.
Pour que les efforts auxquels sont soumis les liens linéaires 11 à 14 ne risquent de provoquer le glissement des liens dans les pattes lla-14a et llb-14b, et par suite la désolidarisation des extrémités de ces liens linéaires durant l'ouverture, des agencements particuliers de ces pattes peuvent être prévus, comme représentés aux figures 2 et 3. Dans le cas où une seule patte 16 est surmoulée à l'extrémité d'un lien linéaire 17, cette patte 16 a d'une part une face fixée directement à une face du corps de planche de bord ou du volet, et le lien linéaire 17 est ensuite rabattu sur la face libre de manière à obtenir un effet de coincement s 'opposant au glissement du lien dans la patte. Additionnellement, le lien 17 peut en outre être fixé à la face externe de la patte, comme représenté dans la figure 2.So that the forces to which the linear links 11 to 14 are subjected do not risk to cause the sliding of the links in the lla-14a and 11b-14b tabs, and consequently the separation of the ends of these linear links during the opening, of the arrangements particular of these tabs can be provided, as shown in Figures 2 and 3. In the case where a single leg 16 is overmolded at the end of a linear link 17, this lug 16 has on the one hand a face directly attached to one face of the dashboard body or the shutter, and the linear link 17 is then folded down on the free face so as to obtain a wedging effect opposing the sliding of the link in the paw. Additionally, the link 17 may further be attached to the outer face of the tab, as shown in FIG.
La robustesse de la fixation du lien linéaire 17 est ainsi accrue puisque la fixation du lien linéaire 17 à la patte 16 qui est elle-même solidarisée à son support est assurée d'une part par le surmoulage de la patte 16 sur le lien linéaire et d'autre part par la fixation du lien linéaire à la face libre de cette patte 16. Le lien linéaire 17 s'étend ainsi dans l'épaisseur de la patte 16, tout en étant par ailleurs fixé à sa face libre 19.The robustness of the attachment of the linear link 17 is thus increased since the attachment of the linear link 17 to the tab 16 which is itself secured to its support is provided on the one hand by the overmoulding of the tab 16 on the linear link and on the other hand by fixing the linear link to the free face of this tab 16. The linear link 17 thus extends in the thickness of the tab 16, while being also fixed to its free face 19.
Complémentairement, une autre patte 18 peut aussi être surmoulée sur le même lien linéaire 17, en étant légèrement espacée de la patte 16 le long de ce lien, comme illustré sur la figure 3. Dans ce cas, lors du montage, la première patte 16 est rabattue et fixée à une face de la seconde patte 18, et l'autre face de la patte est alors fixée directement à une face du corps de planche de bord ou du volet. Les pattes sont fixées à la face arrière du volet et du corps de planche de bord par soudure par vibrations ou par ultrasons ou tout autre procédé adapté aux matières plastiques utilisées pour ces pattes, pour le volet et pour le corps de planche de bord. Alternativement, et en fonction des matériaux utilisés, les liens linéaires peuvent être fixés directement aux faces arrières du volet et du corps de planche de bord, comme illustré dans l'exemple de la figure 4, où le volet repéré par 24 est délimité par un contour 23 dont une partie transversale 26 coïncide avec l'axe AX d'articulation autour duquel ce volet tourne pour s'ouvrir.Complementarily, another tab 18 may also be overmolded on the same linear link 17, being slightly spaced from the tab 16 along this link, as shown in Figure 3. In this case, during assembly, the first tab 16 is folded down and attached to one side of the second leg 18, and the other side of the tab is then attached directly to a face of the dashboard body or the flap. The tabs are fixed to the rear face of the flap and the dashboard body by vibration or ultrasonic welding or any other method adapted to the plastics used for these tabs, the flap and the dashboard body. Alternatively, and depending on the materials used, the linear links can be fixed directly to the rear faces of the flap and the dashboard body, as illustrated in the example of Figure 4, where the flap marked by 24 is delimited by a contour 23, a transverse portion 26 coincides with the hinge axis AX around which this flap turns to open.
Deux liens linéaires 28 et 29 agencés selon des dispositions généralement annulaires, ici rectangulaires, chevauchant la partie 26 sont alors fixés directement à la face arrière du corps de planche de bord 22 et du volet 24 de manière à s'étendre de part et d'autre de la partie 26 pour renforcer la liaison au niveau de la charnière AX. Les liens linéaires qui sont fixés à la face arrière du corps de planche et du volet comportent des portions chevauchant le bord transversal coïncidant avec l'axe AX de pivotement du volet. Mais ces liens linéaires peuvent également s'étendre au delà de cette région pour chevaucher les parties latérales de ce contour, de manière à constituer également des moyens de retenue de l'ouverture du volet, comme dans les exemples des figures .Two linear links 28 and 29 arranged in generally annular arrangements, here rectangular, overlapping the portion 26 are then fixed directly to the rear face of the dashboard body 22 and the flap 24 so as to extend on either side of the portion 26 to strengthen the connection at the hinge AX. The linear links which are fixed to the rear face of the board body and the flap comprise portions overlapping the transverse edge coinciding with the pivot axis AX of the flap. But these linear links can also extend beyond this region to overlap the lateral portions of this contour, so as to also constitute retaining means of the flap opening, as in the examples of the figures.
Dans l'exemple de la figure 5, tout comme dans les exemples précédents, la planche de bord 31 comporte un corps 32 pourvu d'un contour 33 délimitant une ouverture fermée par un volet 34. La aussi, le contour 33 est généralement rectangulaire et comporte deux parties transversales opposées 36 et 38 dont l'une, à savoir la partie 36 coïncide avec l'axe AX de rotation du volet, et deux autres parties latérales 38 et 39 orientées longitudinalement par rapport au véhicule sur lequel la planche de bord est destinée à être montée.In the example of FIG. 5, just as in the preceding examples, the instrument panel 31 comprises a body 32 provided with an outline 33 delimiting an opening closed by a flap 34. Also, the contour 33 is generally rectangular and comprises two opposite transverse portions 36 and 38, one of which, namely the portion 36 coincides with the axis AX of rotation of the flap, and two other lateral portions 38 and 39 oriented longitudinally with respect to the vehicle on which the dashboard is intended to be mounted.
Dans ce mode de réalisation, deux liens linéaires 41 et 42 comportant chacun une portion 43, 44 chevauchent la partie 36 du contour 33 pour être fixés de part et d'autre de cette partie de contour. Le lien linéaire 41 est fixé par l'intermédiaire de deux pattes 41a et 41b surmoulées sur ce lien linéaire et qui sont elles-mêmes fixées au volet 34 et au corps de planche de bord 32.In this embodiment, two linear links 41 and 42 each having a portion 43, 44 overlap the portion 36 of the contour 33 to be fixed on either side of this contour portion. The linear link 41 is fixed by means of two tabs 41a and 41b overmolded on this linear link and which are themselves fixed to the flap 34 and to the dashboard body 32.
De manière analogue, le lien linéaire 42 est fixé au corps de planche et au volet respectivement par une patte 42a et par une autre patte 42b toutes deux surmoulées sur ce lien. Complémentairement, chaque lien linéaire 41, 42 se prolonge au delà de la patte 41b, 42b fixée au volet, pour rejoindre à nouveau le corps de planche de bord 32 en chevauchant une partie latérale correspondante 38, 39 du contour 33. Chacun de ces deux liens linéaires 41, 42 comporte ainsi une portion 46, 47 chevauchant une partie latérale correspondante 38, 39 du contour 33, et chacun de ces deux liens linéaires est fixé à la planche de bord 32 par une patte additionnelle 41c, 42c.Similarly, the linear link 42 is fixed to the board body and to the flap respectively by a tab 42a and by another tab 42b both overmolded on this link. Complementarily, each linear link 41, 42 extends beyond the tab 41b, 42b fixed to the flap, to rejoin the dashboard body 32 by overlapping a corresponding lateral portion 38, 39 of the contour 33. Each of these two linear links 41, 42 thus comprises a portion 46, 47 overlapping a corresponding lateral portion 38, 39 of the contour 33, and each of these two linear links is fixed to the dashboard 32 by an additional lug 41c, 42c.
La portion 46, 47 chevauchant la partie latérale correspondante 38, 39 du contour est ainsi fixée de part et d'autre du contour, d'une part par les pattes 41b fixées au volet et d'autre part par les pattes 41c et 42c fixées à la planche de bord.The portion 46, 47 overlapping the corresponding lateral portion 38, 39 of the contour is thus fixed on either side of the contour, on the one hand by the tabs 41b fixed to the flap and on the other hand by the tabs 41c and 42c fixed to the dashboard.
Deux autres liens linéaires 48 et 49 s'étendent du volet au corps de la planche de bord, en comportant chacun une portion 51, 52 chevauchant respectivement les parties latérales 38 et 39, et en étant fixés de part et d'autre de ces parties latérales 38, 39 par des pattes surmoulées portant les références 48b, 48c, 49b, 49c. Comme visible sur les figures, les pattes 41b,Two other linear links 48 and 49 extend from the flap to the body of the dashboard, each having a portion 51, 52 respectively overlapping the side portions 38 and 39, and being fixed on either side of these parts. laterals 38, 39 by molded tabs bearing the references 48b, 48c, 49b, 49c. As visible in the figures, the tabs 41b,
48b, 41c, 48c sont disposées selon les sommets d'un carré, et les liens linéaires 41 et 48 sur lesquels ces pattes sont surmoulées relient ces pattes selon les diagonales de ce carré, de sorte que les portions 46 et 51 de ces liens linéaires sont croisées l'une sur l'autre. De manière analogue, les pattes 42b, 49b, 42c, 49c sont aussi disposées selon les sommets d'un carré et elles sont rejointes par les liens linéaires 42 et 48 disposés selon les diagonales de ce carré de manière à se croiser au niveau de leurs portions 42 et 57.48b, 41c, 48c are arranged at the vertices of a square, and the linear links 41 and 48 on which these tabs are overmolded connect these tabs along the diagonals of this square, so that the portions 46 and 51 of these linear links are crossed on one another. Similarly, the tabs 42b, 49b, 42c, 49c are also arranged at the vertices of a square and they are joined by the linear links 42 and 48 arranged along the diagonals of this square so as to intersect at their level. portions 42 and 57.
Les portions des liens linéaires chevauchant les parties latérales du contour sont lâches, de manière à permettre le débattement du volet, et elles ont par ailleurs une longueur ajustée pour limiter cette ouverture du volet afin d'éviter qu'il ne puisse heurter le pare-brise.The portions of the linear links overlapping the lateral parts of the outline are loose, so as to allow the movement of the flap, and they also have a length adjusted to limit this opening of the flap to prevent it can hit the windshield.
La disposition croisée des liens linéaires de retenue du volet permet d'assurer la retenue du volet sans réduire inutilement la surface que le coussin traverse pour se déployer. En d'autres termes, lorsque le volet est ouvert, les liens linéaires de retenue situés sur les côtés du volet, du fait de leur disposition croisée, ne constituent pas un obstacle au déploiement du coussin selon les directions latérales. Comme illustré dans la variante de la figure 6, les liens linéaires additionnels 48 et 49 peuvent également s'étendre jusque sur le corps de planche de bord pour comporter chacun une portion 53, 54 chevauchant la partie transversale 36 du contour 33 coïncidant avec l'axe AX.The cross arrangement of the linear retaining links of the flap ensures the retention of the flap without unnecessarily reducing the surface that the cushion crosses to deploy. In other words, when the flap is open, the linear retaining links located on the sides of the flap, because of their cross arrangement, do not constitute an obstacle to the deployment of the cushion in the lateral directions. As illustrated in the variant of FIG. 6, the additional linear links 48 and 49 can also extend as far as the dashboard body to each comprise a portion 53, 54 overlapping the transverse portion 36 of the contour 33 coinciding with the AX axis.
Dans cette variante, les quatre liens linéaires 41, 42 et 48, 49 définissent d'une part quatre portions situées au niveau de l'articulation AX qu'elles rigidifient, et d'autre part deux portions croisées pour chaque bord latéral du volet et destinées à retenir le mouvement d'ouverture de ce volet.In this variant, the four linear links 41, 42 and 48, 49 define on the one hand four portions located at the joint AX which they stiffen, and on the other hand two portions crossed for each lateral edge of the shutter and intended to retain the opening movement of this flap.
Dans un autre mode de réalisation qui est illustré sur la figure 7 un unique lien linéaire directement fixé à la face arrière du volet et du corps de planche est agencé de telle manière qu'il comporte quatre portions chevauchant la partie du contour du volet coïncidant avec son articulation, et que chacune des deux parties latérales du contour est chevauchée par deux portions croisées l'une sur l'autre formant liens linéaires de retenue.In another embodiment which is illustrated in FIG. 7 a single linear link directly fixed to the rear face of the flap and the board body is arranged in such a way that it comprises four portions overlapping the part of the flap contour coinciding with its articulation, and that each of the two lateral portions of the contour is overlapped by two portions crossed one on the other forming linear retaining links.
Dans le mode de réalisation de la figure 7, tout comme dans les cas précédents, la planche de bord 61 comporte un corps 62 pourvu d'un contour 63 délimitant une ouverture fermée par un volet 64. Là aussi, le contour 63 est généralement rectangulaire et comporte deux parties transversales opposées 66 et 67 dont l'une, à savoir la partie 66 coïncide avec l'axe AX de rotation du volet, et deux autres parties latérales 68 et 69 orientées longitudinalement par rapport au véhicule sur lequel la planche de bord est destinée à être montée.In the embodiment of FIG. 7, just as in the previous cases, the instrument panel 61 comprises a body 62 provided with an outline 63 delimiting an opening closed by a flap 64. Again, the contour 63 is generally rectangular and has two opposite transverse parts 66 and 67, one of which, namely the part 66 coincides with the axis AX of rotation of the flap, and two other lateral parts 68 and 69 oriented longitudinally with respect to the vehicle on which the dashboard is intended to be mounted.
Le lien linéaire qui est repéré par 70 est disposé au niveau de la partie transversale 66 selon une série d'ondulations pour comporter quatre portions 71 à 74 chevauchant la partie transversale 66 du contour 63. Complémentairement, il est disposé au niveau de la partie latérale 68 pour définir deux portions 76 et 77 croisées l'une sur l'autre et chevauchant cette partie latérale 68, et il est disposé au niveau de l'autre partie latérale 63 selon deux autres portions 78 et 79 croisées l'une sur l'autre et chevauchant cette autre partie latérale 69.The linear link that is marked by 70 is disposed at the transverse portion 66 in a series of corrugations to include four portions 71 to 74 overlapping the transverse portion 66 of the contour 63. Complementarily, it is disposed at the side portion. 68 to define two portions 76 and 77 crossed over each other and overlapping this lateral portion 68, and it is arranged at the other lateral portion 63 in two other portions 78 and 79 crossed one on the other and overlapping this other lateral part 69.
Afin d'améliorer la cohésion du lien linéaire avec le volet 64 et/ou avec le corps de planche de bord, le volet 64 peut être pourvu d'un renfort 82 à sa face arrière comportant une rigole 81. Dans ce cas, comme illustré en figure 8, le lien linéaire 70 est engagé dans la rigole 81 à laquelle il peut être fixé par soudage à ultrasons ou autre. Additionnellement, le renfort comprend des nervures externes 83 orientées perpendiculairement à la direction du lien pour éviter que le renfort ne soit déchiré par le lien linéaire sous l'effet de la pression exercée par le coussin gonflable lors de son déploiement.In order to improve the cohesion of the linear link with the flap 64 and / or with the dashboard body, the flap 64 may be provided with a reinforcement 82 at its rear face including a channel 81. In this case, as illustrated in Figure 8, the linear link 70 is engaged in the channel 81 to which it can be fixed by ultrasonic welding or other. Additionally, the reinforcement comprises external ribs 83 oriented perpendicular to the direction of the link to prevent the reinforcement is torn by the linear link under the effect of the pressure exerted by the airbag during its deployment.
Dans les différents modes de réalisation de l'invention, les liens linéaires utilisés ont avantageusement une section ronde ou ovale et contiennent de la fibre de polyaramide et/ou de polyester, ce qui autorise un fonctionnement similaire à toutes les températures, en termes de résistance aux contraintes mécaniques. Chaque lien a avantageusement une résistance à la rupture supérieure à cent cinquante daN, voire trois cent daN et préférentiellement cinq cent daN. L'allongement à rupture est inférieur à vingt-cinq pourcents, voire quinze pourcents, et préférentiellement à dix pourcents.In the various embodiments of the invention, the linear links used advantageously have a round or oval section and contain polyaramid and / or polyester fiber, which allows a similar operation at all temperatures, in terms of resistance. mechanical stress. Each link advantageously has a breaking strength greater than one hundred fifty daN, or even three hundred daN and preferably five hundred daN. The elongation at break is less than twenty-five percent, even fifteen percent, and preferably ten percent.
Chaque lien a avantageusement une résistance à la rupture supérieure à cent cinquante daN, et avantageusement supérieure à cinq cent daN voire trois cent daN. L'allongement à trois cent daN est inférieur à vingt-cinq pourcents, et il vaut préférentiellement dix pourcents, voire quinze pourcents.Each link advantageously has a breaking strength greater than one hundred and fifty daN, and advantageously greater than five hundred daN or even three hundred daN. The elongation at three hundred daN is less than twenty-five percent, and is preferably ten percent or even fifteen percent.
Dans les exemples illustrés sur les figures, les liens linéaires sont fixés à la face arrière du corps de planche et du volet, mais ils peuvent aussi être fixés à la face avant, en étant dissimulés par la mousse et la peau constituant le revêtement externe de la planche de bord. In the examples illustrated in the figures, the linear links are attached to the rear face of the board body and the flap, but they can also be attached to the front face, being concealed by the foam and the skin constituting the outer coating of the dashboard.

Claims

REVENDICATIONS
1. Corps de planche de bord de véhicule automobile (1 ; 21 ; 31 ; 61), comprenant une ouverture fermée par un volet (4 ; 24 ; 34 ; 64), l'ouverture et le volet étant tous deux délimités par un contour (3 ; 23 ; 33, 63) généralement rectangulaire, le volet étant apte à s'ouvrir pour permettre le déploiement d'un coussin de sécurité gonflable, caractérisé en ce qu'il comporte également un ou des liens linéaires (11-14 ; 28, 29 ; 41, 42, 48, 49 ; 70) fixés à une face du corps de planche de bord et du volet, de telle manière que des portions (43, 44 ; 53, 54 ; 71, 72, 73, 74) de liens linéaires chevauchent une partie (6 ; 26 ; 36 ; 66) du contour orientée transversalement par rapport au véhicule sur lequel la planche de bord est destinée à être montée, pour constituer ou renforcer une charnière (AX) par laquelle le volet est articulé sur le corps de planche de bord et comportant un lien linéaire (41, 48, 42, 49 ; 70) dont une portion (46, 51, 47, 52 ; 76, 77, 78, 79) chevauche une partie latérale (38, 39 ; 68, 69) du contour (63), cette partie latérale étant orientée longitudinalement par rapport au véhicule sur lequel la planche de bord est destinée à être montée, cette portion de lien linéaire étant lâche au niveau de la partie latérale du contour qu'elle chevauche de manière à constituer un lien linéaire de retenue limitant l'amplitude d'ouverture du volet.Motor vehicle dashboard body (1; 21; 31; 61), comprising an opening closed by a flap (4; 24; 34; 64), the opening and the flap being both delimited by an outline (3; 23; 33, 63) generally rectangular, the flap being able to open to allow the deployment of an airbag, characterized in that it also comprises one or linear links (11-14; 28, 29, 41, 42, 48, 49, 70) attached to one face of the dashboard body and the flap, such that portions (43, 44, 53, 54, 71, 72, 73, 74 ) of linear links overlap a portion (6; 26; 36; 66) of the transversely oriented contour with respect to the vehicle on which the dashboard is to be mounted to form or reinforce a hinge (AX) by which the flap is articulated on the dashboard body and having a linear link (41, 48, 42, 49, 70), a portion of which (46, 51, 47, 52, 76, 77, 7 8, 79) overlaps a lateral portion (38, 39; 68, 69) of the contour (63), this lateral part being oriented longitudinally with respect to the vehicle on which the dashboard is intended to be mounted, this linear link portion being loose at the side portion of the contour that it overlaps so as to constitute a linear restraint link limiting the opening amplitude of the flap.
2. Corps de planche de bord selon la revendication 1, comportant des pattes de fixation (Ha-2. Dashboard body according to claim 1, comprising fastening lugs (Ha-
14a, llb-14b; 10, 15; 16, 18; 41a-41c, 42a-42c, 48a-48c, 49a-49c) surmoulées sur les liens linéaires, les liens linéaires étant fixés au corps de la planche de bord et/ou au volet par l'intermédiaire de ces pattes. 14a, 11b-14b; 10, 15; 16, 18; 41a-41c, 42a-42c, 48a-48c, 49a-49c) overmolded on the linear links, the linear links being fixed to the body of the dashboard and / or shutter by means of these tabs.
3. Corps de planche de bord selon la revendication 2, comportant au moins une patte de fixation (10, 15) surmoulée sur au moins deux liens linaires distincts.3. Body of dashboard according to claim 2, comprising at least one fixing lug (10, 15) overmolded on at least two distinct linear links.
4. Corps de planche de bord selon la revendication 2 ou3, comportant au moins un lien linéaire4. Dashboard body according to claim 2 or 3, comprising at least one linear link
(17) fixé au corps de planche de bord ou au volet au moyen de deux pattes (16, 18) surmoulées sur ce lien linéaire, ces deux pattes étant superposées et fixées l'une à l'autre, l'une de ces pattes étant fixée au corps de planche de bord ou au volet.(17) fixed to the dashboard body or the flap by means of two lugs (16, 18) overmolded on this linear link, these two lugs being superimposed and fixed to one another, one of these lugs being attached to the dashboard body or shutter.
5. Corps de planche de bord selon l'une des revendications 1 à 4, comportant au moins un lien linéaire (28, 29) agencé selon une disposition généralement annulaire. 5. dashboard body according to one of claims 1 to 4, comprising at least one linear link (28, 29) arranged in a generally annular arrangement.
6. Corps de planche de bord selon la revendication 5, comportant deux portions (46, 51, 47, 52; 76, 77, 78, 79) de liens linéaires de retenue chevauchant toutes deux une même partie latérale (38, 39 ; 68, 69) du contour (63), et dans lequel ces deux portions de liens linéaires sont croisées l'une sur 1 ' autre .The dashboard body according to claim 5, comprising two portions (46, 51, 47, 52, 76, 77, 78, 79) of linear retaining links both overlapping a same lateral portion (38, 39; , 69) of the contour (63), and wherein these two portions of linear links are crossed one on the other.
7. Corps de planche de bord selon la revendication 5 ou 6, comportant un lien linéaire unique (70) agencé pour comporter d'une part plusieurs portions (71-74) chevauchant chacune une partie transversale (66) du contour, et d'autre part plusieurs portions (76-79) chevauchant chacune une partie latérale (68, 69) du contour .7. dashboard body according to claim 5 or 6, comprising a single linear link (70) arranged to comprise firstly several portions (71-74) each overlapping a transverse portion (66) of the contour, and on the other hand several portions (76-79) each overlapping a lateral portion (68, 69) of the contour.
8. Corps de planche de bord selon l'une des revendications précédentes, dans lequel chaque lien linéaire est fixé à la face arrière du volet en étant engagé dans une rigole (81) prévue à cet effet, et dans lequel cette rigole (81) est recouverte par une plaque (82) présentant une ou des nervures orientées perpendiculairement au lien linéaire (70) . 8. dashboard body according to one of the preceding claims, wherein each linear link is fixed to the rear face of the flap being engaged in a channel (81) provided for this purpose, and wherein the channel (81). is covered by a plate (82) having one or more ribs oriented perpendicularly to the linear link (70).
9. Corps de planche de bord selon l'une des revendications précédentes, comportant deux à six portions de liens (43, 44 ; 53, 54 ; 71, 72, 73, 74) pour constituer ou renforcer une charnière par laquelle le volet (4 ; 24 ; 34 ; 64) est articulé sur le corps de planche de bord. 9. Body of dashboard according to one of the preceding claims, comprising two to six portions of links (43, 44, 53, 54, 71, 72, 73, 74) for constituting or reinforcing a hinge by which the flap ( 4; 24; 34; 64) is hinged to the dashboard body.
EP10700573A 2009-01-21 2010-01-20 Hinge arrangement for airbag flap hinged on a dashboard Withdrawn EP2379373A1 (en)

Applications Claiming Priority (2)

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FR0900253A FR2941195B1 (en) 2009-01-21 2009-01-21 ARRANGEMENT OF AN AIRBORNE SAFETY CUSHION HINGE HINGED ON A DASHBOARD
PCT/EP2010/050617 WO2010084125A1 (en) 2009-01-21 2010-01-20 Hinge arrangement for airbag flap hinged on a dashboard

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EP2379373A1 true EP2379373A1 (en) 2011-10-26

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US (1) US8500158B2 (en)
EP (1) EP2379373A1 (en)
KR (1) KR101355469B1 (en)
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WO (1) WO2010084125A1 (en)

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US20120032467A1 (en) 2012-02-09
KR20110113187A (en) 2011-10-14
FR2941195B1 (en) 2012-10-05
KR101355469B1 (en) 2014-01-27
US8500158B2 (en) 2013-08-06
WO2010084125A1 (en) 2010-07-29
FR2941195A1 (en) 2010-07-23

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