FR2877284A1 - Motor vehicle`s seat base, has anti-submarining crosspiece carried by front of movable frame having support plate and two slugs cooperating with slots to permit frame rotation when plate subjects to inertial stress greater than preset value - Google Patents
Motor vehicle`s seat base, has anti-submarining crosspiece carried by front of movable frame having support plate and two slugs cooperating with slots to permit frame rotation when plate subjects to inertial stress greater than preset value Download PDFInfo
- Publication number
- FR2877284A1 FR2877284A1 FR0411781A FR0411781A FR2877284A1 FR 2877284 A1 FR2877284 A1 FR 2877284A1 FR 0411781 A FR0411781 A FR 0411781A FR 0411781 A FR0411781 A FR 0411781A FR 2877284 A1 FR2877284 A1 FR 2877284A1
- Authority
- FR
- France
- Prior art keywords
- seat
- frame
- motor vehicle
- submarining
- movable frame
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
- B60N2/427—Seats or parts thereof displaced during a crash
- B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
- B60N2/42754—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion
- B60N2/42763—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion with anti-submarining systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
- B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
- B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
- B60N2/4214—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal
- B60N2/4221—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal due to impact coming from the front
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
Abstract
Description
La présente invention est relative à une assise d'un siège de véhiculeThe present invention relates to a seat of a vehicle seat
automobile comprenant une armature et une traverse d'anti-sousmarinage. automobile comprising an armature and an anti-submarine cross.
Lors d'un choc frontal, le passager d'un véhicule automobile, sanglé sur son siège, a tendance à glisser sous la ceinture de sécurité. Ce glissement sous la ceinture de sécurité peut provoquer des lésions graves à l'abdomen. Afin de limiter ces risques de lésions, on équipe les sièges de véhicule automobile de dispositifs dit d'anti-sousmarinage destinés à empêcher le corps du passager de glisser sous la ceinture de sécurité. In a frontal impact, the passenger of a motor vehicle, strapped in his seat, tends to slip under the seat belt. This slipping under the seat belt can cause serious damage to the abdomen. In order to limit these risks of injury, motor vehicle seats are equipped with so-called anti-submarining devices designed to prevent the body of the passenger from slipping under the seat belt.
Les dispositifs d'anti-sousmarinage connus sont de différents types. On connaît par exemple et notamment à travers les demandes de brevets FR 2 798 629 et EP 0 889 800, des dispositifs d'anti-sousmarinage constitués d'une traverse vers l'avant du siège automobile sur lequel le bas du corps du passager peut prendre appui. Cette traverse est retenue en position par des moyens susceptibles d'absorber le choc en se déformant. En cas de choc, sous l'effet de l'inertie, le corps du passager appuie sur cette traverse d'anti-sousmarinage et la fait basculer vers l'avant en entraînant les moyens d'absorption d'énergie. Known anti-submarining devices are of different types. For example, patent applications FR 2 798 629 and EP 0 889 800 disclose anti-submarining devices consisting of a cross member for the front of the car seat on which the lower body of the passenger can take support. This cross is held in position by means capable of absorbing the shock by deforming. In the event of impact, under the effect of inertia, the body of the passenger presses against this anti-submarine crossing and tilts it forward by driving the energy absorbing means.
Un tel dispositif d'anti-sousmarinage présente l'inconvénient de laisser néanmoins la possibilité d'un glissement du corps sous la ceinture de sécurité. Such an anti-submarining device has the disadvantage of leaving nevertheless the possibility of a sliding of the body under the seat belt.
Le deuxième dispositif connu d'anti-sousmarinage, consiste en un dispositif pyrotechnique disposé dans l'assise du siège qui déclenche un airbag venant réduire l'avancée du bassin de l'occupant, et de ce fait, limiter ce phénomène de sousmarinage. Ce dispositif présente l'inconvénient de ne pas être adapté à toutes les morphologies des occupants et de créer des lésions résultant de la mise en oeuvre du dispositif pyrotechnique. The second known anti-submarining device, consists of a pyrotechnic device disposed in the seat cushion that triggers an airbag to reduce the advance of the occupant's basin, and thus limit this phenomenon of underwater. This device has the disadvantage of not being adapted to all the morphologies of the occupants and create lesions resulting from the implementation of the pyrotechnic device.
Un troisième dispositif d'anti-sousmarinage, également connu, consiste en l'adjonction au niveau de la ceinture de sécurité un pré-tenseur pyrotechnique. Dans ce dispositif, lors d'un choc, un dispositif pyrotechnique ressert brutalement la ceinture de sécurité de façon à empêcher le bassin du passager de se déplacer sous la ceinture de sécurité. A third anti-submarining device, also known, consists of adding a pyrotechnic pre-tensioner at the level of the safety belt. In this device, during an impact, a pyrotechnic device brutally tightened the seat belt so as to prevent the passenger's pelvis from moving under the seat belt.
Un tel dispositif présente l'inconvénient de ne pas s'adapter à la morphologie de tous les occupants et de créer potentiellement des lésions consécutives à la mise en oeuvre du dispositif pyrotechnique. Such a device has the disadvantage of not adapting to the morphology of all occupants and potentially creating lesions consecutive to the implementation of the pyrotechnic device.
Enfin, on connaît un dispositif d'anti-sousmarinage qui consiste en un airbag disposé dans le bas de la planche de bord du véhicule et qui est appelé communément airbag de genoux. Ce dispositif présente les mêmes inconvénients que les dispositifs précédents. Finally, there is known an anti-submarining device which consists of an airbag disposed in the bottom of the dashboard of the vehicle and which is commonly called knee airbag. This device has the same disadvantages as the previous devices.
Le but de la présente invention est de remédier à ces inconvénients en proposant un dispositif anti-sousmarinage qui engendre une contreréaction efficace pour bloquer le bassin du passager lors d'un choc frontal, mais qui fonctionne sans l'utilisation de moyens pyrotechniques. The object of the present invention is to overcome these disadvantages by providing an anti-submarining device which generates an effective counter-reaction to block the passenger's pelvis during a frontal impact, but which operates without the use of pyrotechnic means.
A cet effet, l'invention a pour objet une assise d'un siège de véhicule automobile, comprenant une armature et une traverse d'anti-sousmarinage portée par l'avant d'un cadre mobile comportant à sa partie arrière un moyen d'appui destiné à recevoir les efforts d'inertie d'un passager en cas de choc, ledit cadre étant monté, dans l'armature de l'assise du siège, pivotant autour d'un axe transversal situé entre le moyen d'appui et la traverse d'antisousmarinage. De plus, l'assise comporte un moyen de retenue calibré du cadre de façon à ne permettre le pivotement du cadre que lorsque les moyens d'appui sont soumis à un effort supérieur à une valeur déterminée. To this end, the subject of the invention is a seat of a motor vehicle seat, comprising an armature and an anti-submarining crossbar carried by the front of a mobile frame having at its rear part a means of support for receiving the inertial forces of a passenger in the event of impact, said frame being mounted in the frame of the seat cushion, pivoting about a transverse axis located between the support means and the crosses of antisousmarinage. In addition, the seat comprises calibrated means for retaining the frame so as to allow pivoting of the frame only when the support means are subjected to a force greater than a determined value.
De préférence, la distance L1 entre l'axe de pivotement du cadre mobile et le bord avant de la traverse d'anti-sousmarinage est comprise entre 1/5 et 1/2 de la distance L2 entre l'arrière du moyen d'appui et le bord avant de la traverse d'anti-sousmarinage. Preferably, the distance L1 between the pivot axis of the mobile frame and the front edge of the anti-submarining crossmember is between 1/5 and 1/2 of the distance L2 between the rear of the support means and the front edge of the anti-submarine traverse.
Au moins un moyen de retenu calibré peut être constitué d'un pion monté coulissant dans une lumière comportant au moins un cran, le pion étant solidaire d'un montant latéral du cadre mobile et la lumière étant prévue dans un montant latéral de l'armature de l'assise, ou bien le pion étant solidaire d'un montant latéral de l'armature de l'assise et la lumière étant prévue dans un montant latéral du cadre mobile. At least one calibrated retaining means may consist of a pin slidably mounted in a slot having at least one notch, the pin being secured to a lateral upright of the movable frame and the slot being provided in a lateral upright of the frame the seat, or the pin being secured to a lateral amount of the frame of the seat and the light being provided in a lateral amount of the movable frame.
Le moyen d'appui est par exemple une plaque d'appui s'étendant d'un montant latéral à l'autre du cadre mobile. The support means is for example a support plate extending from a lateral amount to the other of the movable frame.
En outre, le cadre mobile peut porter la nappe d'assise constituée, par exemple, d'un treillis métallique. In addition, the movable frame may carry the seat sheet consisting, for example, of a wire mesh.
L'invention concerne également un véhicule automobile qui comporte au moins un siège dont l'assise comprend un dispositif d'anti-sousmarinage conforme à l'invention. The invention also relates to a motor vehicle which comprises at least one seat whose seat comprises an anti-submarining device according to the invention.
L'invention va maintenant être décrite de façon plus précise mais non limitative en regard des figures annexées dans lesquelles: - la figure 1 est une vue en perspective d'un dispositif d'anti- sousmarinage pour un siège de véhicule automobile; - la figure 2 est une vue schématique d'un siège de véhicule automobile comportant un dispositif anti-sousmarinage; la figure 3 est une vue schématique d'un moyen de retenue calibrée d'un dispositif d'anti-sousmarinage. The invention will now be described in a more precise but nonlimiting manner with reference to the appended figures in which: - Figure 1 is a perspective view of an anti-submarine device for a motor vehicle seat; - Figure 2 is a schematic view of a motor vehicle seat comprising an anti-submarining device; Figure 3 is a schematic view of a calibrated retaining means of an anti-submarining device.
Le dispositif d'anti-sousmarinage repéré généralement par 1 à la figure 2 est irnplanté dans l'assise 2 d'un siège automobile. Ce dispositif d'antisousmarinage est constitué d'une traverse d'anti-sousmarinage 3 disposée vers l'avant de l'assise du siège et portée par un cadre mobile 4, constitué de montants latéraux 5A et 5B reliés par une traverse arrière 6. La traverse d'anti-sousmarinage 3 est reliée de façon rigide au cadre mobile 4. Le cadre mobile 4 comporte dans sa partie arrière une plaque d'appui 7 qui s'étend d'un montant latéral à l'autre du cadre, et qui constitue un moyen d'appui. Cette plaque d'appui 7 est disposée dans l'assise du siège à un endroit qui supporte normalement le bas du corps du passager. The anti-submarining device generally indicated by 1 in FIG. 2 is installed in the seat 2 of a car seat. This anti-submarining device consists of an anti-submarining cross-member 3 arranged towards the front of the seat cushion and carried by a movable frame 4, consisting of side posts 5A and 5B connected by a rear crossmember 6. The anti-submarining cross member 3 is rigidly connected to the movable frame 4. The movable frame 4 comprises in its rear part a support plate 7 which extends from one lateral upright to the other of the frame, and which is a means of support. This support plate 7 is disposed in the seat cushion at a place that normally supports the lower body of the passenger.
Le cadre mobile 4, qui porte la traverse anti-sousmarinage 3, est montée mobile autour d'un axe de rotation 8 horizontal qui vient reposer sur deux traverses latérales 9A et 9B de l'armature de l'assise du siège. L'ensemble constitué par le cadre mobile 4 et par la traverse d'antisousmarinage 3 peut donc pivoter autour de cet axe 8 entre deux positions, une première position de repos dans laquelle l'arrière du cadre 4 est en position haute et la traverse anti-sousmarinage 3 est en position basse, et une position active, dans laquelle l'arrière du cadre mobile est en position basse et la traverse d'anti-sousmarinage 3 est relevée. Ce mouvement du dispositif d'anti-sousmarinage se réalise au moment d'un choc sous l'effet de l'inertie du corps du passager qui exerce un effort violent sur la plaque d'appui 7. Cet effort peut être de l'ordre de 1100 à 1300 déca Newton. The movable frame 4, which carries the anti-submarining cross member 3, is mounted movably about a horizontal axis of rotation 8 which rests on two lateral crosspieces 9A and 9B of the frame of the seat cushion. The assembly constituted by the movable frame 4 and the anti-underseaming cross member 3 can therefore pivot about this axis 8 between two positions, a first rest position in which the rear of the frame 4 is in the up position and the cross member anti -sousmarinage 3 is in the low position, and an active position, in which the rear of the mobile frame is in the low position and the anti-submarining crossbar 3 is raised. This movement of the anti-submarining device is carried out at the moment of impact under the effect of the inertia of the body of the passenger who exerts a violent force on the support plate 7. This effort can be of the order from 1100 to 1300 deca Newton.
Afin de faire en sorte que le basculement du dispositif d'antisousmarinage n'ait lieu qu'au moment d'un choc, le cadre mobile 4 comporte, dans la partie arrière de chacun de ses montants 5A et 5B, des pions 10A et 10B qui coopèrent avec des lumières 11A et 11B prévues dans les montants latéraux 9A et 9B de l'armature de l'assise du siège et qui comportent chacune des moyens de crantage 12A (un seul visible sur la figure). Les pions qui coopèrent avec les lumières comportant des moyens de crantage, constituent des moyens de retenue calibrés. In order to ensure that the tilting of the anti-undersea device takes place only at the moment of impact, the mobile frame 4 comprises, in the rear part of each of its uprights 5A and 5B, pins 10A and 10B. which cooperate with lights 11A and 11B provided in the lateral uprights 9A and 9B of the frame of the seat and which each comprise means 12A notching (only one visible in the figure). The pins which cooperate with the lights having means of notching, constitute means of retaining calibrated.
Dans le mode de réalisation qui est représenté, les lumières 11A et 11B comportant des crans 12A sont portés par les montants latéraux 9A et 9B de l'armature de l'assise du siège et les pions 10A et 10B sont portés par les montants latéraux 5A et 5B du cadre 4. Mais on peut envisager une disposition inverse dans laquelle les pions sont portés par les montants latéraux des armatures du siège, et les lumières sont prévues dans les montants latéraux du cadre. In the embodiment shown, the lights 11A and 11B having notches 12A are carried by the lateral uprights 9A and 9B of the frame of the seat and the pins 10A and 10B are carried by the lateral uprights 5A and 5B of the frame 4. However, it is possible to envisage an inverse arrangement in which the pins are carried by the lateral uprights of the seat frames, and the lights are provided in the lateral uprights of the frame.
Dans le mode de réalisation représenté, les lumières ne comportent qu'un cran, mais on peut envisager des modes de réalisation dans lesquels les lumières comportent plusieurs crans, ce qui permet d'avoir un mouvement plus progressif de basculement du dispositif d'antisousmarinage. In the embodiment shown, the lights have only one notch, but it is possible to envisage embodiments in which the lights comprise a plurality of notches, which makes it possible to have a more progressive movement of tilting of the anti-submarining device.
Comme représenté à la figure 2 la distance L1 entre l'extrémité avant de la traverse d'anti-sousmarinage et l'axe de rotation 8, et la longueur L2 qui correspond à la distance entre l'extrémité avant de la traverse d'antisousmarinage et l'extrémité arrière de la plaque d'assise 7, sont telles que LI est compris de préférence entre 1/5 et 1/2 de la longueur L2. C'est par l'adaptation de ces rapports de L1 et L2 qu'on détermine les bonnes conditions de fonctionnement de dispositif d'anti-sousmarinage. As represented in FIG. 2, the distance L1 between the front end of the anti-submarine crossmember and the axis of rotation 8, and the length L2 which corresponds to the distance between the front end of the anti-underseam crossing and the rear end of the base plate 7, are such that LI is preferably between 1/5 and 1/2 of the length L2. It is through the adaptation of these ratios of L1 and L2 that the good operating conditions of anti-submarining device are determined.
Enfin, dans un mode de réalisation préféré, la nappe d'assise constituée par exemple d'un treillis métallique est portée par le dispositif d'antisousmarinage. Finally, in a preferred embodiment, the seat sheet consisting for example of a wire mesh is carried by the anti-undersea device.
Le fonctionnement de ce dispositif va maintenant être décrit. The operation of this device will now be described.
En situation normale, le dispositif anti-sousmarinage est dans une position telle que l'arrière du cadre mobile 4 est en position haute comme représentée en traits pleins sur la figure 2, et de ce fait la traverse d'anti-sousmarinage est dans une position basse. In normal situation, the anti-submarining device is in a position such that the rear of the mobile frame 4 is in the raised position as shown in solid lines in FIG. 2, and thus the anti-submarine cross member is in a low position.
Les pions 10A et 10B sont maintenus dans la position haute des lumières 11A et 11B par les crans. Lors d'un choc frontal violent, sous l'effet de l'inertie, le corps du passager exerce une force important vers le bas. The pins 10A and 10B are held in the high position of the lights 11A and 11B by the notches. During a violent frontal impact, under the effect of inertia, the body of the passenger exerts a significant force downward.
Cette force importante s'exerce sur la plaque d'appui 7. Sous cet effet, les efforts exercés par les pions 10A et 10B sont supérieurs à la capacité de retenue des crans 12A des lumières 11A et 11B. II en résulte que la partie arrière du cadre support 4 descend vers le bas, en pivotant autour de l'axe 8, ce qui relève la traverse d'anti-sousmarinage 3 pour l'amener en position haute représentée en pointillés sur la figure 2. Du fait de ce basculement de l'ensemble du dispositif d'anti-sousmarinage qui relève la traverse d'antisousmarinage, la base du corps du passager est bloquée par l'intermédiaire de ces cuisses sur la traverse d'anti- sousmarinage 3. Ce dispositif a l'avantage de fonctionner d'une façon parfaitement mécanique sans aucun moyen pyrotechnique. This significant force is exerted on the support plate 7. Under this effect, the forces exerted by the pins 10A and 10B are greater than the retaining capacity of the notches 12A of the lights 11A and 11B. As a result, the rear portion of the support frame 4 descends downwards, pivoting about the axis 8, which raises the anti-submarining cross member 3 to bring it to the high position shown in dashed lines in FIG. Due to this tilting of the entire anti-submarining device which raises the anti-undersea crossing, the base of the body of the passenger is blocked via these thighs on the anti-submarining crossbar 3. This device has the advantage of operating in a perfectly mechanical manner without any pyrotechnic means.
L'assise suivant l'invention est adaptée à différentes morphologies d'occupants, et réagit en fonction de l'effort exercé par l'occupant lors d'un choc frontal. The seat according to the invention is adapted to different morphologies of occupants, and reacts according to the force exerted by the occupant during a frontal impact.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0411781A FR2877284B1 (en) | 2004-11-04 | 2004-11-04 | ANTI-SUBMARINING DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0411781A FR2877284B1 (en) | 2004-11-04 | 2004-11-04 | ANTI-SUBMARINING DEVICE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2877284A1 true FR2877284A1 (en) | 2006-05-05 |
| FR2877284B1 FR2877284B1 (en) | 2007-03-02 |
Family
ID=34950771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0411781A Expired - Fee Related FR2877284B1 (en) | 2004-11-04 | 2004-11-04 | ANTI-SUBMARINING DEVICE |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2877284B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011054960A1 (en) * | 2011-10-31 | 2013-05-02 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Seat component for arrangement below seat cushion of motor car seat, has attachment units that are formed such that displacement of seat component relative to rear portion allowed in crash position |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016222192A1 (en) | 2016-11-11 | 2018-05-17 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Vehicle seat with locking device for a lowerable seat part of the vehicle seat |
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| EP0965479A2 (en) * | 1998-06-16 | 1999-12-22 | Nhk Spring Co.Ltd. | Vehicle Seat Assembly |
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2004
- 2004-11-04 FR FR0411781A patent/FR2877284B1/en not_active Expired - Fee Related
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|---|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011054960A1 (en) * | 2011-10-31 | 2013-05-02 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Seat component for arrangement below seat cushion of motor car seat, has attachment units that are formed such that displacement of seat component relative to rear portion allowed in crash position |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2877284B1 (en) | 2007-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20140731 |