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EP0879156A1 - Device for limiting an occupant retaining force in a motor vehicle seat having a seat belt - Google Patents

Device for limiting an occupant retaining force in a motor vehicle seat having a seat belt

Info

Publication number
EP0879156A1
EP0879156A1 EP97905204A EP97905204A EP0879156A1 EP 0879156 A1 EP0879156 A1 EP 0879156A1 EP 97905204 A EP97905204 A EP 97905204A EP 97905204 A EP97905204 A EP 97905204A EP 0879156 A1 EP0879156 A1 EP 0879156A1
Authority
EP
European Patent Office
Prior art keywords
seat
frame
backrest
flange
arrangement according
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Withdrawn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
EP97905204A
Other languages
German (de)
French (fr)
Inventor
Dominique Bellot
Farid Bendjellal
Laurent Froc
Stéphane GERMAIN
Laurent Oudenard
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.)
Renault SA
Original Assignee
Renault SA
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 Renault SA filed Critical Renault SA
Publication of EP0879156A1 publication Critical patent/EP0879156A1/en
Withdrawn legal-status Critical Current

Links

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
    • B60N2/42709—Seats or parts thereof displaced during a crash involving residual deformation or fracture of the structure
    • 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
    • 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
    • B60N2/4228—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 rear
    • 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
    • B60N2/42745—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the back-rest

Definitions

  • the invention relates to an arrangement of a device for limiting the retaining effort of a occupying in a motor vehicle seat wearing a seat belt, the anchor points of which are on board the seat, and one end of said belt being linked to the upper part of the back of said seat.
  • a device for limiting the force linked to said seat belt is generally used.
  • a force limiting device mounted on a seat belt enables the kinematics of the occupant to be controlled over a given distance following a sudden stop of the vehicle following a collision.
  • the control of the kinematics allows the body of the occupant to continue slightly its race before its stop by the blocking of the seat belt and by the end of race of the device of limitation of the effort.
  • Such force limiters are necessarily linked directly to the seat belt strap or to its retractor, which poses certain integration problems, in particular on a belt model having no direct connection with the vehicle body and being carried by a seat.
  • the effort can be limited by moving the seat back.
  • the seat back then accompanies the movement of the body over a certain amplitude thus allowing the absorption of part of the kinetic energy.
  • the publication FR-A-2 101 292 proposes different solutions for integrating a force limiter, in particular between two elements of the seat which can have a relative displacement between them during a strong deceleration following a collision.
  • the force limiter is produced in the form of a device for absorbing kinetic energy which can be used in traction.
  • Such an absorption device requires a large stroke in order to obtain an advantageous limitation of the effort.
  • a large displacement is not easily compatible with a limited angular travel of the seat back and with a minimal space requirement.
  • the occupant risks striking certain elements of the vehicle, this being able to cause significant injuries to said occupant.
  • the subject of the invention is an arrangement of a device for absorbing kinetic energy linked to the displacement of the backrest of a seat of a motor vehicle with respect to its seat, which allows in a space requirement reduced to obtain a good ratio between the energy absorbed and the displacement of said seat back.
  • the force limitation device is located on each side of the seat, between the external lateral part of the back frame and the internal face of the lateral parts of the seat frame , at the articulation of said backrest and said seat.
  • the device for limiting the force consists of a flange which cooperates with a device for adjusting the inclination of the backrest relative to the seat.
  • lights are produced in the flange and cooperate with pins carried by the external lateral parts of the frame of the seat back. According to another characteristic of the invention, lights are produced in the flange and cooperate with pins carried by the internal lateral parts of the frame of the seat cushion.
  • the flange carries pins which cooperate with lights produced in the lateral panies of the frame of the seat back.
  • the flange carries pins which cooperate with lights made in the lateral parts of the frame of the seat cushion.
  • FIG. 1 shows a perspective view of a seat arranged according to the invention.
  • FIG. 2 shows a perspective view of an exploded view of the energy absorbing device.
  • FIG. 3 shows an elevational view of the energy absorber.
  • FIG. 4 shows an elevational view of the energy absorber during the phase of absorption of kinetic energy.
  • FIG. 5 shows a perspective view of a seat provided with a force limiter according to another arrangement.
  • FIG. 6 shows an elevational view of the energy absorber according to the second arrangement.
  • FIG. 7 shows an elevational view of the energy absorber during the absorption phase of kinetic energy according to the second arrangement.
  • the seat 1 has a backrest 2 articulated on a seat 3 by means of an angular adjustment device 4 known per se.
  • the seat 3 is supported by slides 5 of longitudinal adjustment.
  • the seat 1 carries a seat belt 10, the anchor points of which are linked to the seat.
  • Two lower fixing points 11 and 12 are connected to a part 6 of the structure of the seat 3 in relation to the slides 5.
  • the third anchoring point 13 of the seat belt 10 is carried by the upper part 20 of the backrest 2 of seat 1 or through another part of said seat 1, a passage for the seat belt strap 10 then being produced in said upper part 20 of said backrest 2.
  • the seat 3 consists of a frame 20 whose side portions 31 are symmetrical and have a zone 32 cooperating with the device 4 for adjusting the inclination of the seat back 2 2.
  • the parts lateral 31 of the seat frame 30 receive a control pin 33 in relation to the adjustment device 4 for the inclination of the backrest 2 of the seat 1.
  • the adjustment device 4 comprises on each side of the seat 1, a means for transmitting movement in cooperation with a flange 7.
  • a backrest frame 21 is pivotally mounted around the control axis 33 by means of bearings 22.
  • Each lateral part 23 of the backrest frame 21 cooperates with a flange 7 interposed between the frame of the seat 30 and said back frame 21.
  • Each of the flanges 7 is engaged with the transmission means of the device 4 for adjusting the inclination of the backrest 2.
  • the flanges 7 are fixed to the backrest frame 21 by means of pins 24 allowing a connection in rotation between said flange 7 and said backrest frame 21.
  • Each pin 24 cooperates with a light 25 whose width is less than the diameter of the pin 24 located in said light 25, except the housings
  • Another possibility consists in making the adjustment device 4 for the inclination of the backrest 2 cooperate with the flanges 7 and the backrest frame 21. The movement due to the angular adjustment would then be carried out between the flanges 7 and the backrest frame 21, the frame of the seat 30 would be in connection with the flanges 7 by means of pins 24 and lights 25 as described above.
  • the part supporting the pins 24 and the part in which the lights 25 are made can receive either said pins 24 and said lights 25.
  • Figures 5 to 7 show a variant of the connection between the flanges 7 and the backrest frame 21.
  • the flanges 7 being carrying a light 25 in relation to a pin 24.
  • the pin 24 is supported by an end 27a d 'a connecting rod 27.
  • the connecting rod 27 is pivotally mounted, about an axis 28 carried by the backrest frame 21, by one end 27b of said connecting rod
  • the connecting rod 27 opposite to that carrying the pin 24.
  • the connecting rod 27 has an orientation substantially tangent to the curvature of the light 25.
  • the pin 24 comes into abutment at the end 29 of the light 25 and blocks the backrest 2 so that the occupant does not collide with an obstacle which can cause injury.
  • the seat belt 10 then receives the energy not dissipated by the force limiting device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)

Abstract

A device for limiting an occupant retaining force in a motor vehicle seat (1) having a seat belt (10) is disclosed. The force limiting device consists of a peg (24) inserted into an aperture (25) of which the width is smaller than the diameter of said peg (24), and the seat (1) comprises a backrest (2) that is tilt-adjustable relative to the seat cushion (3) of said seat (1). Said force limiting device is arranged on either side of the seat (1) between an outer side portion (23) of the backrest frame (21) and the inner surface of the side portions (31) of the seat cushion frame (30), and on the hinge axis between said backrest (2) and said seat cushion (3).

Description

AGENCEMENT D'UN DISPOSITIF DE LIMITATION DE L'EFFORT DE RETENUE D'UN OCCUPANT DANS UN SIEGE DE VEHICULE AUTOMOBILE MUNI D UNE CEINTURE DE SECURITE L'invention concerne un agencement d'un dispositif de limitation de l'effort de retenue d'un occupant dans un siège de véhicule automobile porteur d'une ceinture de sécurité, dont les points d'ancrages sont embarqués sur le siège, et dont une extrémité de ladite ceinture est liée à la partie supérieure du dossier dudit siège. Afin de diminuer la contrainte réalisée par la ceinture de sécurité sur le thorax d'un passager lors d'une forte décélération, il est utilisé généralement un dispositif de limitation de l'effort lié à ladite ceinture de sécurité.ARRANGEMENT OF A DEVICE FOR LIMITING THE RETAINING EFFORT OF AN OCCUPANT IN A MOTOR VEHICLE SEAT PROVIDED WITH A SEAT BELT The invention relates to an arrangement of a device for limiting the retaining effort of a occupying in a motor vehicle seat wearing a seat belt, the anchor points of which are on board the seat, and one end of said belt being linked to the upper part of the back of said seat. In order to reduce the stress produced by the seat belt on the thorax of a passenger during a strong deceleration, a device for limiting the force linked to said seat belt is generally used.

On sait qu'un dispositif limiteur d'effort monté sur une ceinture de sécurité permet de piloter sur une distance donnée la cinématique de l'occupant à la suite d'un arrêt brutal du véhicule consécutif à une collision. Le pilotage de la cinématique permet au corps de l'occupant de continuer légèrement sa course avant son arrêt par le blocage de la ceinture de sécurité et par la fin de course du dispositif de limitation de l'effort.It is known that a force limiting device mounted on a seat belt enables the kinematics of the occupant to be controlled over a given distance following a sudden stop of the vehicle following a collision. The control of the kinematics allows the body of the occupant to continue slightly its race before its stop by the blocking of the seat belt and by the end of race of the device of limitation of the effort.

De tels limiteurs d'effort sont obligatoirement liés directement à la sangle de ceinture de sécurité ou à son enrouleur, ce qui pose certains problèmes d'intégration, en particulier sur un modèle de ceinture n'ayant aucune liaison directe avec la caisse du véhicule et étant porté par un siège. La limitation de l'effort peut être réalisée par le déplacement du dossier du siège. Le dossier du siège accompagne alors le déplacement du corps sur une certaine amplitude permettant ainsi l'absorption d'une partie de l'énergie cinétique. La publication FR-A-2 101 292 propose différentes solutions d'intégration d'un limiteur d'effort, en particulier entre deux éléments du siège pouvant avoir un déplacement relatif entre eux lors d'une forte décélération consécutif à une collision. Le limiteur d'effort est réalisé sous la forme d'un dispositif d'absorption de l'énergie cinétique utilisable en traction.Such force limiters are necessarily linked directly to the seat belt strap or to its retractor, which poses certain integration problems, in particular on a belt model having no direct connection with the vehicle body and being carried by a seat. The effort can be limited by moving the seat back. The seat back then accompanies the movement of the body over a certain amplitude thus allowing the absorption of part of the kinetic energy. The publication FR-A-2 101 292 proposes different solutions for integrating a force limiter, in particular between two elements of the seat which can have a relative displacement between them during a strong deceleration following a collision. The force limiter is produced in the form of a device for absorbing kinetic energy which can be used in traction.

Un tel dispositif d'absorption nécessite une course importante afin d'obtenir une limitation de l'effort intéressante. Un déplacement important n'est pas facilement compatible avec une course angulaire limitée du dossier du siège et avec un encombrement minimal. Dans le cas d'une course angulaire du dossier trop importante l'occupant risque de heurter certains éléments du véhicule, ceci pouvant entraîner des lésions importantes audit occupant.Such an absorption device requires a large stroke in order to obtain an advantageous limitation of the effort. A large displacement is not easily compatible with a limited angular travel of the seat back and with a minimal space requirement. In the event of too great an angular travel of the backrest, the occupant risks striking certain elements of the vehicle, this being able to cause significant injuries to said occupant.

Afin de remédier à ces inconvénients, l'invention a pour objet un agencement d'un dispositif d'absorption de l'énergie cinétique lié au déplacement du dossier d'un siège de véhicule automobile par rapport à son assise, qui permette dans un encombrement réduit d'obtenir un bon rapport entre l'énergie absorbée et le déplacement dudit dossier de siège.In order to remedy these drawbacks, the subject of the invention is an arrangement of a device for absorbing kinetic energy linked to the displacement of the backrest of a seat of a motor vehicle with respect to its seat, which allows in a space requirement reduced to obtain a good ratio between the energy absorbed and the displacement of said seat back.

Selon une caractéristique de l'invention, le dispositif de limitation de l'effort est localisé de chaque côté du siège, entre la partie latérale extérieure de l'armature du dossier et la face intérieure des parties latérales de l'armature de l'assise, au niveau de l'articulation dudit dossier et de ladite assise.According to a characteristic of the invention, the force limitation device is located on each side of the seat, between the external lateral part of the back frame and the internal face of the lateral parts of the seat frame , at the articulation of said backrest and said seat.

Selon une autre caractéristique de l'invention, le dispositif de limitation de l'effort est constitué d'un flasque qui coopère avec un dispositif de réglage de l'inclinaison du dossier par rapport à l'assise.According to another characteristic of the invention, the device for limiting the force consists of a flange which cooperates with a device for adjusting the inclination of the backrest relative to the seat.

Selon une autre caractéristique de l'invention, des lumières sont réalisées dans le flasque et coopèrent avec des pions portés par les parties latérales extérieures de l'armature du dossier du siège. Selon une autre caractéristique de l'invention, des lumières sont réalisées dans le flasque et coopèrent avec des pions portés par les parties latérales intérieures de l'armature de l'assise du siège.According to another characteristic of the invention, lights are produced in the flange and cooperate with pins carried by the external lateral parts of the frame of the seat back. According to another characteristic of the invention, lights are produced in the flange and cooperate with pins carried by the internal lateral parts of the frame of the seat cushion.

Selon une autre caractéristique de l'invention, le flasque porte des pions qui coopèrent avec des lumières réalisées dans les panies latérales de l'armature du dossier du siège.According to another characteristic of the invention, the flange carries pins which cooperate with lights produced in the lateral panies of the frame of the seat back.

Selon une autre caractéristique de l'invention, le flasque porte des pions qui coopèrent avec des lumières réalisées dans les parties latérales de l'armature de l'assise du siège. Selon une autre caractéristique de l'invention, une bielle montée à pivotement par son extrémité, autour d'un axe porté par la partie latérale de l'armature du dossier de siège, est munie à une autre extrémité d'un pion qui coopère avec une lumière réalisée dans le flasque.According to another characteristic of the invention, the flange carries pins which cooperate with lights made in the lateral parts of the frame of the seat cushion. According to another characteristic of the invention, a connecting rod pivotally mounted at its end, around an axis carried by the lateral part of the frame of the seat back, is provided at another end with a pin which cooperates with a light made in the flange.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description d'exemples de réalisation d'un agencement en référence au dessin annexé dans lequel :Other characteristics and advantages of the invention will appear on reading the description of exemplary embodiments of an arrangement with reference to the appended drawing in which:

- la figure 1 représente une vue perspective d'un siège agencé suivant l'invention.- Figure 1 shows a perspective view of a seat arranged according to the invention.

- la figure 2 représente une vue perspective d'un éclaté du dispositif absorbeur d'énergie.- Figure 2 shows a perspective view of an exploded view of the energy absorbing device.

- la figure 3 représente une vue en élévation de l' absorbeur d'énergie.- Figure 3 shows an elevational view of the energy absorber.

- la figure 4 représente une vue en élévation de l' absorbeur d'énergie pendant la phase d'absorption de l'énergie cinétique.- Figure 4 shows an elevational view of the energy absorber during the phase of absorption of kinetic energy.

- la figure 5 représente une vue perspective d'un siège muni d'un limiteur d'effort selon un autre agencement. - la figure 6 représente une vue en élévation de l 'absorbeur d'énergie selon le deuxième agencement.- Figure 5 shows a perspective view of a seat provided with a force limiter according to another arrangement. - Figure 6 shows an elevational view of the energy absorber according to the second arrangement.

- la figure 7 représente une vue en élévation de l 'absorbeur d'énergie pendant la phase d'absorption de l'énergie cinétique selon le deuxième agencement.- Figure 7 shows an elevational view of the energy absorber during the absorption phase of kinetic energy according to the second arrangement.

Tel que représenté à la figure 1 le siège 1 comporte un dossier 2 articulé sur une assise 3 par l'intermédiaire d'un dispositif de réglage angulaire 4 connu en soit. L'assise 3 est supportée par des glissières 5 de réglage longitudinal. Le siège 1 est porteur d'une ceinture de sécurité 10 dont les points d'ancrage sont liés au siège. Deux points 11 et 12 de fixation inférieurs sont reliés à une partie 6 de la structure de l'assise 3 en relation avec les glissières 5. Le troisième point d'ancrage 13 de la ceinture de sécurité 10 est porté par la partie supérieure 20 du dossier 2 du siège 1 ou par une autre partie dudit siège 1 , un passage pour la sangle de ceinture de sécurité 10 étant alors réalisé dans ladite partie supérieure 20 dudit dossier 2.As shown in Figure 1 the seat 1 has a backrest 2 articulated on a seat 3 by means of an angular adjustment device 4 known per se. The seat 3 is supported by slides 5 of longitudinal adjustment. The seat 1 carries a seat belt 10, the anchor points of which are linked to the seat. Two lower fixing points 11 and 12 are connected to a part 6 of the structure of the seat 3 in relation to the slides 5. The third anchoring point 13 of the seat belt 10 is carried by the upper part 20 of the backrest 2 of seat 1 or through another part of said seat 1, a passage for the seat belt strap 10 then being produced in said upper part 20 of said backrest 2.

Tel que représenté à la figure 2 l'assise 3 est constituée d'une armature 20 dont les parties latérales 31 sont symétriques et comportent une zone 32 coopérant avec le dispositif de réglage 4 de l'inclinaison du dossier 2 de siège 1. Les parties latérales 31 de l'armature de l'assise 30 reçoivent un axe de commande 33 en relation avec le dispositif de réglage 4 de l' inclinaison du dossier 2 du siège 1. Le dispositif de réglage 4 comporte de chaque côté du siège 1 , un moyen de transmission du mouvement en coopération avec un flasque 7. Une armature de dossier 21 est montée à pivotement autour de l'axe de commande 33 par l'intermédiaire de paliers 22. Chaque partie latérale 23 de l'armature de dossier 21 coopère avec un flasque 7 intercalé entre l 'armature de l'assise 30 et ladite armature de dossier 21. Chacun des flasques 7 est en prise avec les moyens de transmissions du dispositif de réglage 4 de l'inclinaison du dossier 2. Les flasques 7 sont fixés sur l'armature de dossier 21 par l'intermédiaire de pions 24 permettant une liaison en rotation entre ledit flasque 7 et ladite armature de dossier 21. Chaque pion 24 coopère avec une lumière 25 dont la largeur est inférieure au diamètre du pion 24 localisé dans ladite lumière 25, sauf les logementsAs shown in Figure 2 the seat 3 consists of a frame 20 whose side portions 31 are symmetrical and have a zone 32 cooperating with the device 4 for adjusting the inclination of the seat back 2 2. The parts lateral 31 of the seat frame 30 receive a control pin 33 in relation to the adjustment device 4 for the inclination of the backrest 2 of the seat 1. The adjustment device 4 comprises on each side of the seat 1, a means for transmitting movement in cooperation with a flange 7. A backrest frame 21 is pivotally mounted around the control axis 33 by means of bearings 22. Each lateral part 23 of the backrest frame 21 cooperates with a flange 7 interposed between the frame of the seat 30 and said back frame 21. Each of the flanges 7 is engaged with the transmission means of the device 4 for adjusting the inclination of the backrest 2. The flanges 7 are fixed to the backrest frame 21 by means of pins 24 allowing a connection in rotation between said flange 7 and said backrest frame 21. Each pin 24 cooperates with a light 25 whose width is less than the diameter of the pin 24 located in said light 25, except the housings

26 recevant lesdits pions 24 qui sont ajustés aux diamètres de ceux-ci.26 receiving said pins 24 which are adjusted to the diameters thereof.

Une autre possibilité consiste à faire coopérer le dispositif de réglage 4 de l'inclinaison du dossier 2 avec les flasques 7 et l'armature de dossier 21. Le mouvement dû au réglage angulaire serait alors effectué entre les flasques 7 et l'armature de dossier 21 , l'armature de l'assise 30 serait en liaison avec les flasques 7 par l'intermédiaire de pions 24 et de lumières 25 telle que décrit précédemment.Another possibility consists in making the adjustment device 4 for the inclination of the backrest 2 cooperate with the flanges 7 and the backrest frame 21. The movement due to the angular adjustment would then be carried out between the flanges 7 and the backrest frame 21, the frame of the seat 30 would be in connection with the flanges 7 by means of pins 24 and lights 25 as described above.

Quelque soit la disposition choisie, la partie supportant les pions 24 et la partie dans laquelle sont réalisées les lumières 25 peuvent recevoir indifféremment lesdits pions 24 et lesdites lumières 25.Whatever the arrangement chosen, the part supporting the pins 24 and the part in which the lights 25 are made can receive either said pins 24 and said lights 25.

Les figures 5 à 7 représentent une variante de la liaison entre les flasques 7 et l'armature de dossier 21. Les flasques 7 étant porteurs d'une lumière 25 en relation avec un pion 24. Le pion 24 est supporté par une extrémité 27a d'une bielle 27. La bielle 27 est montée à pivotement, autour d'un axe 28 porté par l'armature de dossier 21, par une extrémité 27b de ladite bielleFigures 5 to 7 show a variant of the connection between the flanges 7 and the backrest frame 21. The flanges 7 being carrying a light 25 in relation to a pin 24. The pin 24 is supported by an end 27a d 'a connecting rod 27. The connecting rod 27 is pivotally mounted, about an axis 28 carried by the backrest frame 21, by one end 27b of said connecting rod

27 opposée à celle portant le pion 24. La bielle 27 a une orientation sensiblement tangente à la courbure de la lumière 25.27 opposite to that carrying the pin 24. The connecting rod 27 has an orientation substantially tangent to the curvature of the light 25.

Lors d'une collision du véhicule contre un obstacle, il en résulte une forte décélération transmise à l'occupant. Un effort est produit sur le thorax de l'occupant par la retenue effectuée par ia ceinture de sécurité 10. Afin de limiter la contrainte réalisée sur le thorax de l'occupant, les liaisons effectuées par les pions 24 dans les lumières 25 permettent de créer un absorbeur d'énergie. Tel que représenté aux figures de 3 à 4, lors de la décélération, un effort important est produit sur la partie supérieure 20 du dossier 2 de siège 1 par l'intermédiaire de la sangle de ceinture de sécurité 10 retenant l'occupant. Le dispositif de réglage 4 de l'inclinaison du dossier 2 résistant à l'effort, une contrainte importante est donc réalisée au niveau du contact entre le pion 24 et la lumière 25. La contrainte entraîne une déformation de la lumière 25 provoquant une absorption de l'énergie.During a collision of the vehicle against an obstacle, this results in a strong deceleration transmitted to the occupant. An effort is produced on the occupant's chest by the restraint carried out by the seat belt 10. In order to limit the stress carried out on the occupant's chest, the connections made by the pins 24 in the lights 25 make it possible to create an energy absorber. As shown in Figures 3 to 4, during deceleration, a significant force is produced on the upper part 20 of the seat back 2 2 by means of the seat belt strap 10 retaining the occupant. The device 4 for adjusting the inclination of the backrest 2 resists the effort, a significant constraint is therefore produced at the contact between the pin 24 and the light 25. The constraint leads to a deformation of the light 25 causing absorption of energy.

Lorsque le choc du véhicule contre un obstacle est trop violent, l'énergie cinétique à absorber est trop importante. Dans ce cas le pion 24 arrive en butée à l'extrémité 29 de la lumière 25 et bloque le dossier 2 afin que l'occupant ne se heurte pas contre un obstacle pouvant occasionner des blessures. La ceinture de sécurité 10 reçoit alors l'énergie non dissipée par le dispositif limiteur d'effort.When the impact of the vehicle against an obstacle is too violent, the kinetic energy to be absorbed is too great. In this case the pin 24 comes into abutment at the end 29 of the light 25 and blocks the backrest 2 so that the occupant does not collide with an obstacle which can cause injury. The seat belt 10 then receives the energy not dissipated by the force limiting device.

Il est possible de prévoir dans la lumière 25 des paliers d'absorption de l'énergie en réalisant dans ladite lumière 25 une variation non régulière de sa largeur. Une telle réalisation peut permettre une répétition du contrôle de la charge appliquée sur le thorax au cours d'un même choc, mais sur des espaces temps plus réduit. It is possible to provide in the light 25 of the energy absorption stages by making in said light 25 an irregular variation of its width. Such an embodiment may allow a repetition of the control of the load applied to the thorax during the same shock, but over shorter time spans.

Claims

REVENDICATIONS 1) Agencement d'un dispositif de limitation de l'effort de retenue d'un occupant dans un siège (1) de véhicule automobile muni d'une ceinture de sécurité (10), ledit dispositif de limitation de l'effort étant constitué d'un pion (24) monté dans une lumière (25) de largeur inférieure au diamètre dudit pion (24) et le siège (1) comportant un dossier (2) réglable en inclinaison par rapport à l'assise (3) dudit siège (1), caractérisé par le fait que le dispositif de limitation de l'effort est localisé de chaque côté du siège (1), entre la partie latérale (23) extérieure de l'armature de dossier (21) et la face intérieure des parties latérales (31) de l'armature de l'assise (30), au niveau de l'articulation dudit dossier (2) et de ladite assise (3).1) Arrangement of a device for limiting the effort of retaining an occupant in a seat (1) of a motor vehicle provided with a seat belt (10), said device for limiting the effort being constituted by '' a pin (24) mounted in a slot (25) of width less than the diameter of said pin (24) and the seat (1) comprising a backrest (2) adjustable in inclination relative to the seat (3) of said seat ( 1), characterized in that the force limiting device is located on each side of the seat (1), between the lateral side part (23) of the backrest frame (21) and the internal face of the parts lateral (31) of the seat frame (30), at the articulation of said backrest (2) and said seat (3). 2) Agencement selon la revendication 1, caractérisé par le fait que le dispositif de limitation de l'effort est constitué d'un flasque (7) qui coopère avec un dispositif de réglage (4) de l'inclinaison du dossier (2) par rapport à l'assise (3).2) Arrangement according to claim 1, characterized in that the force limiting device consists of a flange (7) which cooperates with a device (4) for adjusting the inclination of the backrest (2) by relative to the seat (3). 3) Agencement selon la revendication 2, caractérisé par le fait que des lumières (25) sont réalisées dans le flasque (7) et coopèrent avec des pions (24) portés par les parties latérales (23) extérieures de l'armature de dossier (21) du siège (1).3) Arrangement according to claim 2, characterized in that the lights (25) are formed in the flange (7) and cooperate with pins (24) carried by the lateral parts (23) of the outer frame of the backrest ( 21) of the seat (1). 4) Agencement selon la revendication 2, caractérisé par le fait que des lumières (25) sont réalisées dans le flasque (7) et coopèrent avec des pions (24) portés par les parties latérales (31) intérieures de l'armature de l'assise (30) du siège (1). 5) Agencement selon la revendication 2, caractérisé par le fait que le flasque (7) porte des pions (24) qui coopèrent avec des lumières (25) réalisées dans les parties latérales (23) de l'armature de dossier (21) du siège (1). 6) Agencement selon la revendication 2, caractérisé par le fait que le flasque (7) porte des pions (24) qui coopèrent avec des lumières (25) réalisées dans les parties latérales (23) de l'armature de l'assise (21) du siège (1). 7) Agencement selon la revendication 1 , caractérisé par le fait qu'une bielle (27) montée à pivotement par son extrémité (27b), autour d'un axe (28) porté par la partie latérale (23) de l'armature du dossier (21) de siège (1), est munie à une autre extrémité (27a) d'un pion (24) qui coopère avec une lumière (25) réalisée dans le flasque (7). 8) Agencement selon la revendication 7, caractérisé par le fait que la bielle (27) est orientée sensiblement tangentiellement à la courbure de la lumière (25). 4) Arrangement according to claim 2, characterized in that the lights (25) are formed in the flange (7) and cooperate with pins (24) carried by the side parts (31) inside the frame of the seat (30) of the seat (1). 5) Arrangement according to claim 2, characterized in that the flange (7) carries pins (24) which cooperate with lights (25) made in the lateral parts (23) of the back frame (21) of the seat (1). 6) Arrangement according to claim 2, characterized in that the flange (7) carries pins (24) which cooperate with lights (25) made in the lateral parts (23) of the frame of the seat (21 ) of the headquarters (1). 7) Arrangement according to claim 1, characterized in that a connecting rod (27) pivotally mounted by its end (27b), about an axis (28) carried by the lateral part (23) of the frame of the seat back (21) (1), is provided at another end (27a) with a pin (24) which cooperates with a light (25) produced in the flange (7). 8) Arrangement according to claim 7, characterized in that the connecting rod (27) is oriented substantially tangentially to the curvature of the light (25).
EP97905204A 1996-02-16 1997-02-14 Device for limiting an occupant retaining force in a motor vehicle seat having a seat belt Withdrawn EP0879156A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9601933A FR2744961B1 (en) 1996-02-16 1996-02-16 ARRANGEMENT OF A DEVICE FOR LIMITING THE RETAINING EFFORT OF AN OCCUPANT IN A MOTOR VEHICLE SEAT PROVIDED WITH A SEAT BELT
FR9601933 1996-02-16
PCT/FR1997/000281 WO1997029923A1 (en) 1996-02-16 1997-02-14 Device for limiting an occupant retaining force in a motor vehicle seat having a seat belt

Publications (1)

Publication Number Publication Date
EP0879156A1 true EP0879156A1 (en) 1998-11-25

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EP97905204A Withdrawn EP0879156A1 (en) 1996-02-16 1997-02-14 Device for limiting an occupant retaining force in a motor vehicle seat having a seat belt

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EP (1) EP0879156A1 (en)
FR (1) FR2744961B1 (en)
WO (1) WO1997029923A1 (en)

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FR2744961A1 (en) 1997-08-22
WO1997029923A1 (en) 1997-08-21
FR2744961B1 (en) 1998-03-20

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