WO2017168102A1 - Adjustable seat structure of a vehicle seat, comprising a seat belt buckle part - Google Patents

Adjustable seat structure of a vehicle seat, comprising a seat belt buckle part Download PDF

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Publication number
WO2017168102A1
WO2017168102A1 PCT/FR2017/050751 FR2017050751W WO2017168102A1 WO 2017168102 A1 WO2017168102 A1 WO 2017168102A1 FR 2017050751 W FR2017050751 W FR 2017050751W WO 2017168102 A1 WO2017168102 A1 WO 2017168102A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
seat structure
structure according
toothed
vehicle
Prior art date
Application number
PCT/FR2017/050751
Other languages
French (fr)
Inventor
David HAYAT
Jean Pierre Gauthier
Philippe Duhamel
Original Assignee
Psa Automobiles S.A.
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 Psa Automobiles S.A. filed Critical Psa Automobiles S.A.
Priority to EP17717803.5A priority Critical patent/EP3436314A1/en
Publication of WO2017168102A1 publication Critical patent/WO2017168102A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/26—Anchoring devices secured to the seat
    • 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
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/1605—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the cinematic
    • B60N2/161—Rods
    • B60N2/1615—Parallelogram-like 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
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42772—Seats or parts thereof displaced during a crash characterised by the triggering system
    • B60N2/42781—Seats or parts thereof displaced during a crash characterised by the triggering system mechanical triggering
    • 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
    • B60N2/43—Safety locks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/20—Anchoring devices adjustable in position, e.g. in height
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R2022/1806—Anchoring devices for buckles

Definitions

  • the present invention generally relates to the vehicle seat seat structures which are adjustable in height with respect to the floor of the vehicle.
  • Some vehicle seats including automotive type, have a seat structure whose frame is adjustable longitudinally and height vis-à-vis the floor.
  • Such a seat structure conventionally comprises a seat frame formed of two lateral flanges facing one another and between which extend two front and rear crosspieces.
  • Each lateral flange is slidably mounted on the floor of the vehicle by means of a corresponding slide formed of a movable rail capable of sliding axially along a fixed rail, so as to allow the adjustment of the longitudinal position of the vehicle. seat frame relative to the floor of the motor vehicle.
  • Extension means also allow to adjust the height of the seat frame relative to the floor.
  • the latter are generally constituted by two pairs of front and rear links connecting the two flanges to two pairs of front and rear support feet fixed (for example welded) on the movable rails slides, the pivoting drive of these rods by a device of control causing a change in the height of the seat frame.
  • Such a seat structure is also associated with a belt buckle strand carrying at its upper end a clasp adapted to removably receive the bolt of a seat belt.
  • This loop strand also has a connecting strand sufficiently strong to withstand the regulatory constraints and formed for example by a strap, a cable or a metal strip.
  • This connecting strand is intended to ensure the coupling between the clasp and an element anchored not on the seat frame but on the floor of the vehicle or on one of the movable rails of the rails, so that this element is secured to the floor and that its vertical displacement is thus zero or at least particularly limited (where the rails of the rails have a slight inclination relative to the floor).
  • This particular arrangement of the buckle strand is provided for safety reasons to prevent the rear portion of the frame of the seat structure of the seat is raised in case of a violent impact from the front resulting in a particularly large traction force (up to 2000 daN) of the seat belt on this loop strand.
  • US patent application US 20140265503 discloses a particular seating structure which will now be described in more detail in support of FIG.
  • This seat structure comprises a loop strand 100 comprising a clasp 102 and a strand formed by a rigid strip 103 whose lower end opposite the clasp is coupled to the flange 104 so as to follow the vertical movement of the frame 105.
  • this lower end of the strip 103 is housed in a housing 106 mounted on the flange 104 and traversed by a rigid securing strip 107 whose lower end is rotatably mounted on a lug 108 attached to the movable rail of the slide 109 of the flange 104, so as to be secured to the floor.
  • the housing 106 is arranged to hold together the strip 103 and the securing strip 107 so that the strip 103 is suitable for slide along this slider 107 during the height adjustment of the position of the seat frame 105, a return spring being further disposed in this housing 106 in order to keep the strip 103 and the slider 107 apart.
  • the lower end of the strip 103 and the housing 106 are further shaped so that when a tensile stress greater than or equal to a predetermined minimum threshold is exerted on the loop strand 100, this lower end of the strip 103 is close to the strip 107 against the elastic spring force of the spring and a toothed portion of this strip 103 then comes to lock on a toothed portion of this strip 107 to prevent the sliding up of the strip 103 and thus the rise of the frame sitting 105.
  • this rigid securing strip 107 has the disadvantage of protruding above the flange 104 when the seat frame 105 occupies a low position (as shown in Figure 1), this prominence is then revealed to be the least embarrassing and potentially dangerous for the passenger sitting on the seat.
  • the present invention therefore aims to provide an alternative solution easy to implement, reliable and not impacting the comfort and safety of passengers.
  • a seat structure of a vehicle seat comprising a seat frame comprising two side flanges connected to each other by two front and rear cross members, raising means for adjusting the height of said frame vis-à-vis the floor of said vehicle, a loop strand coupled to one of the flanges and comprising a connecting strand carrying at its upper end a clasp adapted to receive a bolt secured to a seat belt, means adapted to prevent the lifting of said seat frame when said loop strand is subjected to a tensile force greater than or equal to a predetermined threshold;
  • said anti-lifting means comprise a curved toothed rod whose lower end is rotatably articulated along a first transverse axis secured to said floor, said toothed rod being mechanically connected to said loop strand and adapted, when said loop strand is subjected to a tensile force greater than or equal to said threshold, to be moved against a member resilient return to a locking position in which it cooperates by notching with a toothed grain rigidly connected to said flange to prevent the lifting of said seat frame
  • the curved configuration of the toothed rod allows it to remain below the upper plane of the seat frame, including when the latter occupies a low position.
  • the seat structure according to the invention thus makes it possible to guard against the risk of lifting the rear part of the seat frame in the event of a violent impact from the front, without affecting the comfort and safety of the car. user in normal configuration of use since it has no prominent element.
  • said connecting strand is formed by a metal strip articulated in rotation about a second transverse axis on an activation arm pivotally mounted on said flange along a third transverse axis, said anti-lifting means further comprising a pin s' extending along said second transverse axis and passing through a slot provided along said toothed rod so as to cause the displacement of said toothed rod towards said locking position when said loop strand is subjected to a traction force greater than or equal to said threshold;
  • said light is arranged such that said pin travels along the latter during the height adjustment of said seat frame
  • said elastic return member is arranged so as to generate a prestress on said third transverse axis permanently urging said activation arm and said pin towards a position where the latter forces said toothed rod away from said toothed grain;
  • said elastic return member is constituted by a preferably spiral spring formed between said activation arm and said flange;
  • said toothed rod has a concavity turned towards the rear of said flange
  • said connecting rod is preferably toothed along its convex front edge
  • said threshold is preferably between 50 and 60 daN;
  • said structure is preferably slidably mounted on said floor of the vehicle by means of two slides each comprising a movable rail capable of sliding axially along a fixed rail fixed to said floor, said tab being anchored on a said movable rail ; and or
  • Said raising means preferably comprise two pairs of front and rear links pivotally mounted between said flanges and two pairs of front and rear support legs attached to said movable rails slides.
  • the invention also aims in a second aspect a motor vehicle seat comprising such a seat structure.
  • FIG. 2 shows a side view of a seat structure according to the invention showing the seat frame in its extreme low position and the locking member in its unlocked position;
  • Figure 3 is a view similar to Figure 2 but showing the seat frame in its extreme high position and the locking member in its unlocked position;
  • FIG. 4 represents an enlargement of the zone comprising the anti-lifting means of the seat frame, the latter being shown in an intermediate position with the locking member which occupies its unlocked position;
  • Figure 5 is a view similar to Figure 4 but showing the locking member in its locked position.
  • the seat structure 1, of which only a portion is shown in FIGS. 2 to 5, comprises a seat frame 2 comprising two left lateral flanges (not visible) and right 3 facing one another and between which extend two transverse front 4A and rear 4B (the front cross member being constituted by a tub 4A and the rear cross member by a cylindrical tube 4B).
  • the flanges and sleepers are made of sheet steel or other rigid material.
  • the seat structure 1 is slidably mounted on the floor of the vehicle by means of two rails 5 each having a movable rail 5A axially slidable along a fixed rail 5B fixed to the floor of the vehicle.
  • the seat structure 1 also comprises raising means for adjusting the height of the seat frame 2 vis-à-vis the floor between an extreme low position (Figure 2) and an extreme high position (Figure 3).
  • the latter consist of two pairs of front and rear links 11 connecting the two flanges to two pairs of front support feet 6 and rear 7 fixed (for example welded) on the movable rails 5A of the rails 5.
  • each front link 10 is rotatably mounted on the seat frame 2 about a first transverse axis A, while its second end is mounted articulated in rotation on a corresponding front support leg 6 around a second transverse axis B.
  • each rear link 11 is rotatably mounted on the seat frame 2 about a third transverse axis C, while its second end is articulated in rotation on a rear support leg 7 corresponding around a fourth transverse axis D.
  • the height adjustment of the seat frame 2 is thus obtained by pivoting the front and rear links 10 10 controlled for example by a gear mechanism connected to a manual or motorized control device.
  • the seat structure 1 also comprises a loop strand 20 comprising at its upper end a clasp 21 adapted to removably receive the bolt 22 of a not shown seat belt.
  • This loop strand 20 further comprises a connecting strand here formed by a metal strip 23 (which may alternatively be constituted by a metal cable) whose upper end is fixed to the lower part of the clasp 21.
  • the lower end of the strip 23, opposite the clasp 21, is further articulated in rotation about a transverse axis E on an activation arm 24 itself pivotally mounted on the flange 3 along a transverse axis F.
  • the seat structure 1 further comprises a locking member 26 mechanically linked to the loop strand 20.
  • This locking member is constituted by a curved rod in a circular arc 26 having here a concavity turned towards the rear of the flange 3 and whose lower end is articulated to rotate about a transverse axis G on a fixed tab 30 (for example welded) on the movable rail 5A of the slide 5, so as to be secured to the floor.
  • This rod 26 has, over most of its length, an oblong slot 27 curved in an arc traversed by a pin (not visible in the figures) extending along the axis of articulation E between the strip 23 and the arm 24, so that this piece walks, at the height adjustment of the seat frame 2, along this light 27 between its lower end when the frame 2 occupies its extreme low position ( Figure 2) and its upper end when the latter occupies its extreme high position ( Figure 3).
  • the curved shape of the connecting rod 26 makes it possible for the latter not to protrude above this flange 3 when the seat frame 2 occupies its extreme low position.
  • the connecting rod 26 also comprises a toothed portion 28 extending along its convex front edge and designed to cooperate with a toothed grain 29 rigidly connected to the flange 3.
  • a spiral spring (not visible in the figures) is furthermore provided between the actuating arm 24 and the flange 3, so as to generate a prestressing on the pivot axis F continuously urging this activation arm 24 towards its rest position illustrated in Figures 2 to 4.
  • This pivoting of the pin also forces the connecting rod to pivot about the axis G with its toothed portion 28 which is notched on the toothed grain 29 integral with the flange 3 so as to prevent the lifting of the seat frame 2.
  • the locking member 26 then occupies its locking position illustrated in FIG.
  • the minimum threshold of the tensile force is predetermined so as to prevent this locking from occurring when the user adjusts the height of the frame of the seat structure while exerting simultaneously a tensile force on the seat belt (such a traction force may for example occur when the user comes to buckle the latch of the belt on the clasp of the buckle strand or when it leans forward while the belt is already buckled).
  • this threshold will preferably be between 40 and 60 daN.
  • the toothed rod 26 has a concavity turned not towards the rear but towards the front of the flange 3.
  • the seat structure according to the invention is not slidably mounted on the floor of the vehicle: the leg on which is rotatably articulated the toothed rod is then directly anchored to the floor of the vehicle;
  • spiral spring is replaced by another type of elastic return member such as for example a helical spring traction; and or
  • the front and / or rear cross members are different and constituted for example by tubular sections having circular, rectangular or square sections.
  • this invention is not limited to the automotive field but can be implemented in any type of land vehicle, maritime or air.

Abstract

The invention relates to a seat structure of a vehicle seat, comprising a height-adjustable frame and including two end plates (3), a buckle part coupled to one (3) of the end plates and comprising a connecting part (23) having a clasp (21) for receiving a bolt that is solidly connected to a seatbelt, means for preventing the frame from lifting when the buckle part is subjected to a pull force greater than or equal to a predetermined threshold, said means comprising a curved toothed connecting rod (26) rotatably hinged to a lug (30) anchored to the floor of the vehicle. The connecting rod (26) is mechanically connected to the buckle part (20) and, when the buckle part is subjected to a pull force greater than or equal to a predetermined threshold, the connecting rod is moved against an elastic return member into a locked position in which it engages by means of notching with a toothed structure (29) rigidly connected to the end plate (3).

Description

STRUCTURE D'ASSISE REGLABLE D'UN SIEGE DE VEHICULE COMPORTANT UN BRIN BOUCLE DE CEINTURE DE SECURITE.  ADJUSTABLE SEAT STRUCTURE OF A VEHICLE SEAT COMPRISING A BELT BUCKLE OF A SAFETY BELT.
Domaine de l'invention Field of the invention
La présente invention concerne d'une manière générale les structures d'assise de siège de véhicule réglables en hauteur vis-à-vis du plancher du véhicule.  The present invention generally relates to the vehicle seat seat structures which are adjustable in height with respect to the floor of the vehicle.
Elle vise plus particulièrement la problématique de l'ergonomie d'utilisation des brins boucles de ceintures de sécurité sur des une telle structure d'assise et la qualité perçue.  It relates more particularly to the problem of the ergonomics of use of the buckle straps safety belts on such a seat structure and perceived quality.
Arrière-plan de l'invention Background of the invention
Certains sièges de véhicule, notamment de type automobile, sont dotés d'une structure d'assise dont le cadre est réglable longitudinalement et en hauteur vis-à-vis du plancher.  Some vehicle seats, including automotive type, have a seat structure whose frame is adjustable longitudinally and height vis-à-vis the floor.
Une telle structure d'assise comporte de manière classique un cadre d'assise formé de deux flasques latéraux en regard l'un de l'autre et entre lesquels s'étendent deux traverses avant et arrière.  Such a seat structure conventionally comprises a seat frame formed of two lateral flanges facing one another and between which extend two front and rear crosspieces.
Chaque flasque latéral est monté à coulissement sur le plancher du véhicule par l'intermédiaire d'une glissière correspondante formée d'un rail mobile apte à coulisser axialement le long d'un rail fixe, de sorte à permettre le réglage de la position longitudinale du cadre d'assise par rapport au plancher du véhicule automobile.  Each lateral flange is slidably mounted on the floor of the vehicle by means of a corresponding slide formed of a movable rail capable of sliding axially along a fixed rail, so as to allow the adjustment of the longitudinal position of the vehicle. seat frame relative to the floor of the motor vehicle.
Des moyens de rehausse permettent en outre de régler la hauteur du cadre d'assise par rapport au plancher. Ces derniers sont généralement constitués par deux paires de biellettes avant et arrière reliant les deux flasques à deux paires de pieds supports avant et arrière fixés (par exemple soudés) sur les rails mobiles des glissières, l'entraînement à pivotement de ces biellettes par un dispositif de commande entraînant une modification de la hauteur du cadre d'assise.  Extension means also allow to adjust the height of the seat frame relative to the floor. The latter are generally constituted by two pairs of front and rear links connecting the two flanges to two pairs of front and rear support feet fixed (for example welded) on the movable rails slides, the pivoting drive of these rods by a device of control causing a change in the height of the seat frame.
Une telle structure d'assise est également associée à un brin boucle de ceinture de sécurité portant à son extrémité supérieure un fermoir apte à recevoir de manière amovible le pêne d'une ceinture de sécurité. Ce brin boucle comporte également un brin de liaison suffisamment résistant pour supporter les contraintes réglementaires et formé par exemple par une sangle, un câble ou un feuillard métallique. Such a seat structure is also associated with a belt buckle strand carrying at its upper end a clasp adapted to removably receive the bolt of a seat belt. This loop strand also has a connecting strand sufficiently strong to withstand the regulatory constraints and formed for example by a strap, a cable or a metal strip.
Ce brin de liaison est destiné à assurer le couplage entre le fermoir et un élément ancré non pas sur le cadre d'assise mais sur le plancher du véhicule ou sur l'un des rails mobiles des glissières, de sorte que cet élément soit arrimé au plancher et que son déplacement vertical soit ainsi nul ou tout du moins particulièrement limité (cas où les rails des glissières présentent une légère inclinaison par rapport au plancher).  This connecting strand is intended to ensure the coupling between the clasp and an element anchored not on the seat frame but on the floor of the vehicle or on one of the movable rails of the rails, so that this element is secured to the floor and that its vertical displacement is thus zero or at least particularly limited (where the rails of the rails have a slight inclination relative to the floor).
Cet agencement particulier du brin boucle est prévu pour une question de sécurité afin d'empêcher que la partie arrière du cadre de la structure d'assise du siège ne se soulève en cas de choc violent par l'avant entraînant un effort de traction particulièrement important (jusqu'à 2000 daN) de la ceinture de sécurité sur ce brin boucle.  This particular arrangement of the buckle strand is provided for safety reasons to prevent the rear portion of the frame of the seat structure of the seat is raised in case of a violent impact from the front resulting in a particularly large traction force (up to 2000 daN) of the seat belt on this loop strand.
Toutefois, cela a pour inconvénient de ne pas permettre au fermoir de suivre le déplacement du cadre d'assise lorsque ce dernier est réglé en hauteur via les moyens de rehausse, ce qui complexifie les opérations de bouclage et de débouclage de la ceinture de sécurité et nuit à l'ergonomie globale du véhicule.  However, this has the disadvantage of not allowing the clasp to follow the movement of the seat frame when the latter is adjusted in height via the raising means, which complicates the operations of looping and unfastening of the seat belt and night to the overall ergonomics of the vehicle.
Afin de répondre à cette problématique, la demande de brevet américaine US 20140265503 divulgue une structure d'assise particulière que l'on va maintenant décrire plus en détails à l'appui de la figure 1.  In order to respond to this problem, US patent application US 20140265503 discloses a particular seating structure which will now be described in more detail in support of FIG.
Cette structure d'assise comporte un brin boucle 100 comprenant un fermoir 102 et un brin formé par un feuillard rigide 103 dont l'extrémité inférieure opposée au fermoir est couplée au flasque 104 de sorte à suivre le déplacement vertical du cadre 105.  This seat structure comprises a loop strand 100 comprising a clasp 102 and a strand formed by a rigid strip 103 whose lower end opposite the clasp is coupled to the flange 104 so as to follow the vertical movement of the frame 105.
Plus précisément, cette extrémité inférieure du feuillard 103 est logée dans un boîtier 106 monté sur le flasque 104 et traversé par une réglette rigide d'arrimage 107 dont l'extrémité inférieure est montée à rotation sur une patte 108 fixée sur le rail mobile de la glissière 109 du flasque 104, de sorte à être arrimée au plancher.  More specifically, this lower end of the strip 103 is housed in a housing 106 mounted on the flange 104 and traversed by a rigid securing strip 107 whose lower end is rotatably mounted on a lug 108 attached to the movable rail of the slide 109 of the flange 104, so as to be secured to the floor.
Le boîtier 106 est agencé pour maintenir ensemble le feuillard 103 et la réglette d'arrimage 107 de sorte que ce feuillard 103 soit apte à coulisser le long de cette réglette 107 lors du réglage en hauteur de la position du cadre d'assise 105, un ressort de rappel étant en outre disposé dans ce boîtier 106 afin de maintenir à l'écart le feuillard 103 et la réglette 107. The housing 106 is arranged to hold together the strip 103 and the securing strip 107 so that the strip 103 is suitable for slide along this slider 107 during the height adjustment of the position of the seat frame 105, a return spring being further disposed in this housing 106 in order to keep the strip 103 and the slider 107 apart.
L'extrémité inférieure du feuillard 103 et le boîtier 106 sont en outre conformés de sorte que lorsqu'un effort de traction supérieur ou égal à un seuil minimal prédéterminé est exercé sur le brin boucle 100, cette extrémité inférieure du feuillard 103 se rapproche de la réglette 107 à rencontre de la force élastique de rappel du ressort et qu'une portion dentée de ce feuillard 103 vienne alors se cranter sur une portion dentée de cette réglette 107 pour empêcher le coulissement vers le haut du feuillard 103 et donc la remontée du cadre d'assise 105.  The lower end of the strip 103 and the housing 106 are further shaped so that when a tensile stress greater than or equal to a predetermined minimum threshold is exerted on the loop strand 100, this lower end of the strip 103 is close to the strip 107 against the elastic spring force of the spring and a toothed portion of this strip 103 then comes to lock on a toothed portion of this strip 107 to prevent the sliding up of the strip 103 and thus the rise of the frame sitting 105.
Toutefois, cette réglette rigide d'arrimage 107 présente l'inconvénient de saillir au dessus du flasque 104 lorsque le cadre d'assise 105 occupe une position basse (comme illustré par la figure 1), cette proéminence se révélant alors pour le moins gênante et potentiellement dangereuse pour le passager assis sur le siège.  However, this rigid securing strip 107 has the disadvantage of protruding above the flange 104 when the seat frame 105 occupies a low position (as shown in Figure 1), this prominence is then revealed to be the least embarrassing and potentially dangerous for the passenger sitting on the seat.
Objet et résumé de l'invention Object and summary of the invention
La présente invention vise donc à proposer une solution alternative aisée à mettre en œuvre, fiable et n'impactant pas le confort et la sécurité des passagers.  The present invention therefore aims to provide an alternative solution easy to implement, reliable and not impacting the comfort and safety of passengers.
Elle propose à cet effet, une structure d'assise d'un siège de véhicule comportant un cadre d'assise comprenant deux flasques latéraux reliés l'un à l'autre par deux traverses avant et arrière, des moyens de rehausse permettant de régler la hauteur dudit cadre vis-à- vis du plancher dudit véhicule, un brin boucle couplé à l'un des flasques et comprenant un brin de liaison portant à son extrémité supérieure un fermoir apte à recevoir un pêne solidaire d'une ceinture de sécurité, des moyens aptes à empêcher le soulèvement dudit cadre d'assise lorsque ledit brin boucle est soumis à un effort de traction supérieur ou égal à un seuil prédéterminé ;  It proposes for this purpose, a seat structure of a vehicle seat comprising a seat frame comprising two side flanges connected to each other by two front and rear cross members, raising means for adjusting the height of said frame vis-à-vis the floor of said vehicle, a loop strand coupled to one of the flanges and comprising a connecting strand carrying at its upper end a clasp adapted to receive a bolt secured to a seat belt, means adapted to prevent the lifting of said seat frame when said loop strand is subjected to a tensile force greater than or equal to a predetermined threshold;
caractérisée en ce que lesdits moyens anti-soulèvement comportent une bielle dentée incurvée dont l'extrémité inférieure est articulée à rotation selon un premier axe transversal arrimé audit plancher, ladite bielle dentée étant liée mécaniquement audit brin boucle et apte, lorsque ledit brin boucle est soumis à un effort de traction supérieur ou égal audit seuil, à être déplacée à rencontre d'un organe élastique de rappel vers une position de verrouillage dans laquelle elle coopère par crantage avec un grain denté lié rigidement audit flasque afin d'empêcher le soulèvement dudit cadre d'assise characterized in that said anti-lifting means comprise a curved toothed rod whose lower end is rotatably articulated along a first transverse axis secured to said floor, said toothed rod being mechanically connected to said loop strand and adapted, when said loop strand is subjected to a tensile force greater than or equal to said threshold, to be moved against a member resilient return to a locking position in which it cooperates by notching with a toothed grain rigidly connected to said flange to prevent the lifting of said seat frame
La conformation incurvée de la bielle dentée permet à cette dernière de demeurer en dessous du plan supérieur du cadre d'assise, y compris lorsque ce dernier occupe une position basse.  The curved configuration of the toothed rod allows it to remain below the upper plane of the seat frame, including when the latter occupies a low position.
La structure d'assise selon l'invention permet ainsi de se prémunir contre le risque de soulèvement de la partie arrière du cadre d'assise en cas de choc violent par l'avant, sans pour autant impacter le confort et la sécurité de l'utilisateur en configuration normale d'utilisation puisqu'elle ne comporte aucun élément proéminent.  The seat structure according to the invention thus makes it possible to guard against the risk of lifting the rear part of the seat frame in the event of a violent impact from the front, without affecting the comfort and safety of the car. user in normal configuration of use since it has no prominent element.
Selon des caractéristiques préférées de l'invention, prises seules ou en combinaison :  According to preferred features of the invention, taken alone or in combination:
- ledit brin de liaison est formé par un feuillard métallique articulé en rotation autour d'un deuxième axe transversal sur un bras d'activation monté pivotant sur ledit flasque selon un troisième axe transversal, lesdits moyens anti-soulèvement comportant en outre un pion s'étendant suivant ledit deuxième axe transversal et traversant une lumière ménagée le long de ladite bielle dentée de sorte à entraîner le déplacement de ladite bielle dentée vers ladite position de verrouillage lorsque ledit brin boucle est soumis à un effort de traction supérieur ou égal audit seuil ;  - said connecting strand is formed by a metal strip articulated in rotation about a second transverse axis on an activation arm pivotally mounted on said flange along a third transverse axis, said anti-lifting means further comprising a pin s' extending along said second transverse axis and passing through a slot provided along said toothed rod so as to cause the displacement of said toothed rod towards said locking position when said loop strand is subjected to a traction force greater than or equal to said threshold;
- ladite lumière est agencée de sorte que ledit pion chemine le long de celle-ci lors du réglage en hauteur dudit cadre d'assise ;  said light is arranged such that said pin travels along the latter during the height adjustment of said seat frame;
- ledit organe élastique de rappel est agencé de sorte à générer une précontrainte sur ledit troisième axe transversal sollicitant en permanence ledit bras d'activation et ledit pion vers une position où ce dernier contraint ladite bielle dentée à l'écart dudit grain denté ; - ledit organe élastique de rappel est constitué par un ressort de préférence spiral ménagé entre ledit bras d'activation et ledit flasque ; said elastic return member is arranged so as to generate a prestress on said third transverse axis permanently urging said activation arm and said pin towards a position where the latter forces said toothed rod away from said toothed grain; said elastic return member is constituted by a preferably spiral spring formed between said activation arm and said flange;
- ladite bielle dentée présente une concavité tournée vers l'arrière dudit flasque ;  said toothed rod has a concavity turned towards the rear of said flange;
- ladite bielle est dentée de préférence le long de son bord avant convexe ;  said connecting rod is preferably toothed along its convex front edge;
- ledit seuil est compris de préférence entre 50 et 60 daN ; said threshold is preferably between 50 and 60 daN;
- ladite structure est de préférence montée à coulissement sur ledit plancher du véhicule par l'intermédiaire de deux glissières comportant chacune un rail mobile apte à coulisser axialement le long d'un rail fixe fixé audit plancher, ladite patte étant ancrée sur un dit rail mobile ; et/ou said structure is preferably slidably mounted on said floor of the vehicle by means of two slides each comprising a movable rail capable of sliding axially along a fixed rail fixed to said floor, said tab being anchored on a said movable rail ; and or
- lesdits moyens de rehausse comportent de préférence deux paires de biellettes avant et arrière montées à pivotement entre lesdits flasques et deux paires de pieds supports avant et arrière fixées aux dits rails mobiles des glissières.  - Said raising means preferably comprise two pairs of front and rear links pivotally mounted between said flanges and two pairs of front and rear support legs attached to said movable rails slides.
L'invention vise également sous un second aspect un siège de véhicule automobile comportant une telle structure d'assise.  The invention also aims in a second aspect a motor vehicle seat comprising such a seat structure.
Brève description des dessins Brief description of the drawings
L'exposé de l'invention sera maintenant poursuivi par la description détaillée de deux exemples de réalisation, donnée ci-après à titre illustratif mais non limitatif, en référence aux dessins annexés, sur lesquels :  The description of the invention will now be continued by the detailed description of two exemplary embodiments, given below by way of illustration but without limitation, with reference to the appended drawings, in which:
- la figure 2 représente une vue de côté d'une structure d'assise selon l'invention montrant le cadre d'assise dans sa position extrême basse et l'organe de verrouillage dans sa position déverrouillée ;  - Figure 2 shows a side view of a seat structure according to the invention showing the seat frame in its extreme low position and the locking member in its unlocked position;
- la figure 3 est une vue semblable à la figure 2 mais montrant le cadre d'assise dans sa position extrême haute et l'organe de verrouillage dans sa position déverrouillée ;  - Figure 3 is a view similar to Figure 2 but showing the seat frame in its extreme high position and the locking member in its unlocked position;
- la figure 4 représente un agrandissement de la zone comprenant les moyens anti-soulèvement du cadre d'assise, ce dernier étant montré dans une position intermédiaire avec l'organe de verrouillage qui occupe sa position déverrouillée ; et FIG. 4 represents an enlargement of the zone comprising the anti-lifting means of the seat frame, the latter being shown in an intermediate position with the locking member which occupies its unlocked position; and
- la figure 5 est une vue semblable à la figure 4 mais montrant l'organe de verrouillage dans sa position verrouillée.  - Figure 5 is a view similar to Figure 4 but showing the locking member in its locked position.
Description détaillée de deux modes de réalisation préférés Detailed Description of Two Preferred Embodiments
Dans la description qui va suivre, les termes « avant », « arrière », « supérieure », « inférieure », « longitudinal » et « transversal » sont définis par rapport à la position de montage d'un siège de véhicule automobile dans l'habitacle de ce véhicule.  In the following description, the terms "front", "rear", "upper", "lower", "longitudinal" and "transverse" are defined with respect to the mounting position of a motor vehicle seat in the cockpit of this vehicle.
La structure d'assise 1 dont seule une portion est représentée sur les figures 2 à 5, comporte un cadre d'assise 2 comprenant deux flaques latéraux gauche (non visible) et droit 3 en regard l'un de l'autre et entre lesquels s'étendent deux traverses avant 4A et arrière 4B (la traverse avant étant ici constituée par un baquet 4A et la traverse arrière par un tube cylindrique 4B).  The seat structure 1, of which only a portion is shown in FIGS. 2 to 5, comprises a seat frame 2 comprising two left lateral flanges (not visible) and right 3 facing one another and between which extend two transverse front 4A and rear 4B (the front cross member being constituted by a tub 4A and the rear cross member by a cylindrical tube 4B).
Les flasques et les traverses sont constitués en tôle d'acier ou dans un autre matériau rigide.  The flanges and sleepers are made of sheet steel or other rigid material.
Comme on peut le constater sur les figures 2 et 3, la structure d'assise 1 est montée à coulissement sur le plancher du véhicule par l'intermédiaire de deux glissières 5 comportant chacune un rail mobile 5A apte à coulisser axialement le long d'un rail fixe 5B fixé au plancher du véhicule.  As can be seen in Figures 2 and 3, the seat structure 1 is slidably mounted on the floor of the vehicle by means of two rails 5 each having a movable rail 5A axially slidable along a fixed rail 5B fixed to the floor of the vehicle.
La structure d'assise 1 comporte également des moyens de rehausse permettant de régler la hauteur du cadre d'assise 2 vis-à-vis du plancher entre une position extrême basse (figure 2) et une position extrême haute (figure 3).  The seat structure 1 also comprises raising means for adjusting the height of the seat frame 2 vis-à-vis the floor between an extreme low position (Figure 2) and an extreme high position (Figure 3).
Ces derniers sont constitués par deux paires de biellettes avant 10 et arrière 11 reliant les deux flasques à deux paires de pieds supports avant 6 et arrière 7 fixés (par exemple soudés) sur les rails mobiles 5A des glissières 5.  The latter consist of two pairs of front and rear links 11 connecting the two flanges to two pairs of front support feet 6 and rear 7 fixed (for example welded) on the movable rails 5A of the rails 5.
Plus précisément, la première extrémité de chaque biellette avant 10 est montée articulée en rotation sur le cadre d'assise 2 autour d'un premier axe transversal A, tandis que sa seconde extrémité est montée articulée en rotation sur un pied support avant 6 correspondant autour d'un deuxième axe transversal B. More specifically, the first end of each front link 10 is rotatably mounted on the seat frame 2 about a first transverse axis A, while its second end is mounted articulated in rotation on a corresponding front support leg 6 around a second transverse axis B.
De la même manière, la première extrémité de chaque biellette arrière 11 est montée articulée en rotation sur le cadre d'assise 2 autour d'un troisième axe transversal C, tandis que sa seconde extrémité est montée articulée en rotation sur un pied support arrière 7 correspondant autour d'un quatrième axe transversal D.  Similarly, the first end of each rear link 11 is rotatably mounted on the seat frame 2 about a third transverse axis C, while its second end is articulated in rotation on a rear support leg 7 corresponding around a fourth transverse axis D.
Le réglage en hauteur du cadre d'assise 2 est ainsi obtenu grâce au pivotement des biellettes avant 10 et arrière 11 commandé par exemple par un mécanisme d'engrenage relié à un dispositif de commande manuel ou motorisé.  The height adjustment of the seat frame 2 is thus obtained by pivoting the front and rear links 10 10 controlled for example by a gear mechanism connected to a manual or motorized control device.
La structure d'assise 1 comporte également un brin boucle 20 comprenant à son extrémité supérieure un fermoir 21 apte à recevoir de manière amovible le pêne 22 d'une ceinture de sécurité non représentée.  The seat structure 1 also comprises a loop strand 20 comprising at its upper end a clasp 21 adapted to removably receive the bolt 22 of a not shown seat belt.
Ce brin boucle 20 comprend en outre un brin de liaison formé ici par un feuillard métallique 23 (mais pouvant être constitué en variante par un câble métallique) dont l'extrémité supérieure est fixée à la partie inférieure du fermoir 21.  This loop strand 20 further comprises a connecting strand here formed by a metal strip 23 (which may alternatively be constituted by a metal cable) whose upper end is fixed to the lower part of the clasp 21.
L'extrémité inférieure du feuillard 23, opposée au fermoir 21, est en outre articulée en rotation autour d'un axe transversal E sur un bras d'activation 24 lui-même monté pivotant sur le flasque 3 selon un axe transversal F.  The lower end of the strip 23, opposite the clasp 21, is further articulated in rotation about a transverse axis E on an activation arm 24 itself pivotally mounted on the flange 3 along a transverse axis F.
La structure d'assise 1 comporte en outre un organe de verrouillage 26 lié mécaniquement au brin boucle 20.  The seat structure 1 further comprises a locking member 26 mechanically linked to the loop strand 20.
Cet organe de verrouillage est constitué par une bielle incurvée en arc de cercle 26 présentant ici une concavité tournée vers l'arrière du flasque 3 et dont l'extrémité inférieure est articulée à rotation autour d'un axe transversal G sur une patte 30 fixée (par exemple soudée) sur le rail mobile 5A de la glissière 5, de sorte à être arrimée au plancher.  This locking member is constituted by a curved rod in a circular arc 26 having here a concavity turned towards the rear of the flange 3 and whose lower end is articulated to rotate about a transverse axis G on a fixed tab 30 ( for example welded) on the movable rail 5A of the slide 5, so as to be secured to the floor.
Cette bielle 26 présente, sur la majeure partie de sa longueur, une lumière oblongue 27 incurvée en arc de cercle traversée par un pion (non visible sur les figures) s'étendant suivant l'axe d'articulation E entre le feuillard 23 et le bras 24, de sorte que ce pion chemine, lors du réglage en hauteur du cadre d'assise 2, le long de cette lumière 27 entre son extrémité inférieure lorsque le cadre 2 occupe sa position extrême basse (figure 2) et son extrémité supérieure lorsque ce dernier occupe sa position extrême haute (figure 3). This rod 26 has, over most of its length, an oblong slot 27 curved in an arc traversed by a pin (not visible in the figures) extending along the axis of articulation E between the strip 23 and the arm 24, so that this piece walks, at the height adjustment of the seat frame 2, along this light 27 between its lower end when the frame 2 occupies its extreme low position (Figure 2) and its upper end when the latter occupies its extreme high position (Figure 3).
Comme on peut le constater sur la figure 1, la forme incurvée de la bielle 26 permet d'éviter que cette dernière ne saille au dessus de ce flasque 3 lorsque le cadre d'assise 2 occupe sa position extrême basse.  As can be seen in FIG. 1, the curved shape of the connecting rod 26 makes it possible for the latter not to protrude above this flange 3 when the seat frame 2 occupies its extreme low position.
La bielle 26 comporte également une portion dentée 28 s'étendant le long de son bord avant convexe et prévue pour coopérer avec un grain denté 29 lié rigidement au flasque 3.  The connecting rod 26 also comprises a toothed portion 28 extending along its convex front edge and designed to cooperate with a toothed grain 29 rigidly connected to the flange 3.
Un ressort spiral (non visible sur les figures) est en outre ménagé entre le bras d'activation 24 et le flasque 3, de sorte à générer une précontrainte sur l'axe de pivotement F sollicitant en permanence ce bras d'activation 24 vers sa position de repos illustrée par les figures 2 à 4.  A spiral spring (not visible in the figures) is furthermore provided between the actuating arm 24 and the flange 3, so as to generate a prestressing on the pivot axis F continuously urging this activation arm 24 towards its rest position illustrated in Figures 2 to 4.
Dans cette position de repos et comme on peut le constater en particulier sur la figure 4, le pion s'étendant selon l'axe E contraint la bielle 26 à occuper sa position de déverrouillage dans laquelle sa portion dentée 28 est à l'écart du grain denté 29, de sorte à autoriser le réglage en hauteur de ce cadre d'assise 2.  In this rest position and as can be seen in particular in Figure 4, the pin extending along the axis E constrains the rod 26 to occupy its unlocking position in which its toothed portion 28 is away from the toothed grain 29, so as to allow the height adjustment of the seat frame 2.
Lorsqu'un effort de traction supérieur ou égal à un seuil minimal prédéterminé est exercé sur le brin boucle 20 par l'intermédiaire du pêne 22 de la ceinture de sécurité, le bras d'activation 24 et le pion sont entraînés à pivotement autour de l'axe F à rencontre de la force élastique de rappel du ressort spiral.  When a traction force greater than or equal to a predetermined minimum threshold is exerted on the buckle strand 20 via the bolt 22 of the safety belt, the activation arm 24 and the pin are pivotally driven around the belt. F axis against the spring force of the spiral spring.
Ce pivotement du pion contraint également la bielle à pivoter autour de l'axe G avec sa portion dentée 28 qui vient se cranter sur le grain denté 29 solidaire du flasque 3 de sorte à empêcher le soulèvement du cadre d'assise 2.  This pivoting of the pin also forces the connecting rod to pivot about the axis G with its toothed portion 28 which is notched on the toothed grain 29 integral with the flange 3 so as to prevent the lifting of the seat frame 2.
L'organe de verrouillage 26 occupe alors sa position de verrouillage illustrée par la figure 5.  The locking member 26 then occupies its locking position illustrated in FIG.
Le seuil minimal de l'effort de traction est prédéterminé de sorte à éviter que ce verrouillage ne se produise lorsque l'usager règle la hauteur du cadre de la structure d'assise tout en exerçant simultanément un effort de traction sur la ceinture de sécurité (un tel effort de traction pouvant par exemple survenir lorsque l'usager vient boucler le pêne de la ceinture sur le fermoir du brin boucle ou lorsqu'il se penche vers l'avant alors que la ceinture est déjà bouclée). The minimum threshold of the tensile force is predetermined so as to prevent this locking from occurring when the user adjusts the height of the frame of the seat structure while exerting simultaneously a tensile force on the seat belt (such a traction force may for example occur when the user comes to buckle the latch of the belt on the clasp of the buckle strand or when it leans forward while the belt is already buckled).
En pratique, ce seuil sera compris de préférence entre 40 et 60 daN.  In practice, this threshold will preferably be between 40 and 60 daN.
Selon des variantes de réalisation non représentées, la bielle dentée 26 présente une concavité tournée non pas vers l'arrière mais vers l'avant du flasque 3.  According to alternative embodiments not shown, the toothed rod 26 has a concavity turned not towards the rear but towards the front of the flange 3.
Selon d'autres variantes de réalisation non représentées, la patte According to other variants of embodiment not represented, the leg
30 est absente : l'extrémité inférieure de la bielle dentée 26 étant par articulée à rotation directement sur une tige saillant transversalement du rail mobile 5A de la glissière 5. 30 is absent: the lower end of the toothed rod 26 being articulated to rotate directly on a transversely projecting rod of the movable rail 5A of the slideway 5.
Selon encore d'autres variantes de réalisation non représentées :  According to still other embodiments not shown:
- la structure d'assise selon l'invention n'est pas montée coulissante sur le plancher du véhicule : la patte sur laquelle est articulée à rotation la bielle dentée étant alors directement ancrée au plancher du véhicule ;  - The seat structure according to the invention is not slidably mounted on the floor of the vehicle: the leg on which is rotatably articulated the toothed rod is then directly anchored to the floor of the vehicle;
- la bielle dentée et le brin boucle sont liés mécaniquement par des moyens différents ;  - The toothed rod and the loop strand are mechanically linked by different means;
- le ressort spiral est remplacé par un autre type d'organe élastique de rappel tel que par exemple un ressort hélicoïdal de traction ; et/ou  - The spiral spring is replaced by another type of elastic return member such as for example a helical spring traction; and or
- les traverses avant et/ou arrière sont différentes et constituées par exemple par des profilés tubulaires présentant des sections circulaires, rectangulaires ou encore carrées.  - The front and / or rear cross members are different and constituted for example by tubular sections having circular, rectangular or square sections.
Bien entendu, la présente invention ne se limite pas aux formes de réalisation décrites et représentées, mais englobe toute autre variante d'exécution à la portée de l'homme du métier.  Of course, the present invention is not limited to the embodiments described and shown, but encompasses any other embodiment within the scope of those skilled in the art.
On notera enfin que cette invention n'est pas limitée au domaine automobile mais qu'elle peut être mise en œuvre dans tout type de véhicule terrestre, maritime ou aérien.  Finally, note that this invention is not limited to the automotive field but can be implemented in any type of land vehicle, maritime or air.

Claims

REVENDICATIONS
1. Structure d'assise d'un siège de véhicule comportant un cadre d'assise (2) comprenant deux flasques latéraux (3) reliés l'un à l'autre par deux traverses avant (4A) et arrière (4B), des moyens de rehausse permettant de régler la hauteur dudit cadre (2) vis-à-vis du plancher dudit véhicule (10), un brin boucle (20) couplé à l'un (3) des flasques et comprenant un brin de liaison (23) portant à son extrémité supérieure un fermoir (21) apte à recevoir un pêne (22) solidaire d'une ceinture de sécurité, des moyens aptes à empêcher le soulèvement dudit cadre d'assise (2) lorsque ledit brin boucle (20) est soumis à un effort de traction supérieur ou égal à un seuil minimal prédéterminé ; A seat structure of a vehicle seat comprising a seat frame (2) comprising two lateral flanges (3) connected to each other by two front (4A) and rear (4B) cross members, raising means for adjusting the height of said frame (2) vis-à-vis the floor of said vehicle (10), a loop strand (20) coupled to one (3) of the flanges and comprising a connecting strand (23) ) carrying at its upper end a clasp (21) adapted to receive a bolt (22) integral with a safety belt, means adapted to prevent the lifting of said seat frame (2) when said loop strand (20) is subjected to a tensile stress greater than or equal to a predetermined minimum threshold;
caractérisée en ce que lesdits moyens anti-soulèvement comportent une bielle dentée incurvée (26) dont l'extrémité inférieure est articulée à rotation selon un premier axe transversal (G) arrimé audit plancher, ladite bielle dentée (26) étant liée mécaniquement audit brin boucle (20) et apte, lorsque ledit brin boucle (20) est soumis à un effort de traction supérieur ou égal audit seuil, à être déplacée à rencontre d'un organe élastique de rappel vers une position de verrouillage dans laquelle elle coopère par crantage avec un grain denté (29) lié rigidement audit flasque (3) afin d'empêcher le soulèvement dudit cadre d'assise (2).  characterized in that said anti-lifting means comprise a curved toothed rod (26) whose lower end is rotatably articulated along a first transverse axis (G) secured to said floor, said toothed rod (26) being mechanically connected to said loop strand (20) and adapted, when said loop strand (20) is subjected to a tensile force greater than or equal to said threshold, to be moved against an elastic return member to a locking position in which it cooperates by notching with a toothed grain (29) rigidly connected to said flange (3) to prevent the lifting of said seat frame (2).
2. Structure d'assise selon la revendication 1, caractérisée en ce que ledit brin de liaison est formé par un feuillard métallique (23) articulé en rotation autour d'un deuxième axe transversal (E) sur un bras d'activation (24) monté pivotant sur ledit flasque (3) selon un troisième axe transversal (F), lesdits moyens anti-soulèvement comportant en outre un pion s'étendant suivant ledit deuxième axe transversal (E) et traversant une lumière (27) ménagée le long de ladite bielle dentée (26) de sorte à entraîner le déplacement de ladite bielle dentée (26) vers ladite position de verrouillage lorsque ledit brin boucle (20) est soumis à un effort de traction supérieur ou égal audit seuil. 2. Seat structure according to claim 1, characterized in that said connecting strand is formed by a metal strip (23) articulated in rotation about a second transverse axis (E) on an activation arm (24) pivotally mounted on said flange (3) along a third transverse axis (F), said anti-lifting means further comprising a pin extending along said second transverse axis (E) and passing through a slot (27) formed along said toothed rod (26) so as to cause the displacement of said toothed rod (26) towards said locking position when said loop strand (20) is subjected to a traction force greater than or equal to said threshold.
3. Structure d'assise selon la revendication 2, caractérisée en ce que ladite lumière (27) est agencée de sorte que ledit pion chemine le long de celle-ci lors du réglage en hauteur dudit cadre d'assise (2). 3. Seat structure according to claim 2, characterized in that said slot (27) is arranged so that said pin runs along it when adjusting the height of said seat frame (2).
4. Structure d'assise selon l'une des revendications 2 ou 3, caractérisée en ce que ledit organe élastique de rappel est agencé de sorte à générer une précontrainte sur ledit troisième axe transversal (F) sollicitant en permanence ledit bras d'activation (24) et ledit pion vers une position où ce dernier contraint ladite bielle dentée (26) à l'écart dudit grain denté (29).  4. Seat structure according to one of claims 2 or 3, characterized in that said elastic return member is arranged so as to generate a prestress on said third transverse axis (F) continuously urging said activation arm ( 24) and said pin to a position where the latter forces said toothed rod (26) away from said toothed grain (29).
5. Structure d'assise selon la revendication 4, caractérisée en ce que ledit organe élastique de rappel est constitué par un ressort ménagé entre ledit bras d'activation (24) et ledit flasque (3).  5. Seat structure according to claim 4, characterized in that said resilient return member is constituted by a spring formed between said activation arm (24) and said flange (3).
6. Structure d'assise selon l'une des revendications 1 à 5, caractérisée en ce que ladite bielle dentée (26) présente une concavité tournée vers l'arrière dudit flasque (3).  6. Seat structure according to one of claims 1 to 5, characterized in that said toothed rod (26) has a concavity facing rearward of said flange (3).
7. Structure d'assise selon la revendication 6, caractérisée en ce que ladite bielle (26) est dentée le long de son bord avant convexe.  7. Seat structure according to claim 6, characterized in that said connecting rod (26) is toothed along its convex front edge.
8. Structure d'assise selon l'une des revendications 1 à 7, caractérisée en ce qu'elle est montée à coulissement sur ledit plancher du véhicule par l'intermédiaire de deux glissières (5) comportant chacune un rail mobile (5A) apte à coulisser axialement le long d'un rail fixe (5B) fixé audit plancher, ladite patte (30) étant fixée sur un dit rail mobile (5A).  8. Seat structure according to one of claims 1 to 7, characterized in that it is slidably mounted on said floor of the vehicle by means of two rails (5) each having a movable rail (5A) fit sliding axially along a fixed rail (5B) fixed to said floor, said tab (30) being fixed on a said movable rail (5A).
9. Structure d'assise selon la revendication 8, caractérisée en ce que lesdits moyens de rehausse comportent deux paires de biellettes avant (10) et arrière (11) montées à pivotement entre lesdits flasques (3) et deux paires de pieds supports avant (6) et arrière (7) fixées aux dits rails mobiles (5A) des glissières (5).  9. Seat structure according to claim 8, characterized in that said raising means comprise two pairs of front links (10) and rear (11) pivotally mounted between said flanges (3) and two pairs of front support feet ( 6) and rear (7) fixed to said movable rails (5A) of the slides (5).
10. Siège de véhicule automobile comportant une structure d'assise selon l'une des revendications 1 à 9.  Motor vehicle seat comprising a seat structure according to one of claims 1 to 9.
PCT/FR2017/050751 2016-03-31 2017-03-31 Adjustable seat structure of a vehicle seat, comprising a seat belt buckle part WO2017168102A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17717803.5A EP3436314A1 (en) 2016-03-31 2017-03-31 Adjustable seat structure of a vehicle seat, comprising a seat belt buckle part

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1652809A FR3049536B1 (en) 2016-03-31 2016-03-31 ADJUSTABLE SEAT STRUCTURE OF A VEHICLE SEAT COMPRISING A BELT BUCKLE OF A SAFETY BELT.
FR1652809 2016-03-31

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WO2017168102A1 true WO2017168102A1 (en) 2017-10-05

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PCT/FR2017/050751 WO2017168102A1 (en) 2016-03-31 2017-03-31 Adjustable seat structure of a vehicle seat, comprising a seat belt buckle part

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FR (1) FR3049536B1 (en)
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CN113581033A (en) * 2021-09-14 2021-11-02 上海国琻汽车科技有限公司 Low-sitting-posture seat framework platform and automobile seat
US20220388431A1 (en) * 2019-07-17 2022-12-08 Ts Tech Co., Ltd. Conveyance seat

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DE19935616A1 (en) * 1999-08-03 2001-02-15 Faure Bertrand Sitztech Gmbh Motor vehicle seat with belt lock fastener has spring to permit precise dimensioning of force required to lock belt fastener
DE20306680U1 (en) * 2003-04-29 2004-06-09 Brose Fahrzeugteile Gmbh & Co. Kg, Coburg Automotive impact seat locking mechanism has second seat belt locking mechanism which is automatically activated in the event of failure by first locking restraint
EP1637389A2 (en) * 2004-09-21 2006-03-22 Aisin Seiki Kabushiki Kaisha Seat apparatus
US20070126277A1 (en) * 2005-12-07 2007-06-07 Gopal Musale Inboard buckle attachment for a four-way seat
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Publication number Priority date Publication date Assignee Title
US20220388431A1 (en) * 2019-07-17 2022-12-08 Ts Tech Co., Ltd. Conveyance seat
US11794614B2 (en) * 2019-07-17 2023-10-24 Ts Tech Co., Ltd. Conveyance seat
CN113581033A (en) * 2021-09-14 2021-11-02 上海国琻汽车科技有限公司 Low-sitting-posture seat framework platform and automobile seat

Also Published As

Publication number Publication date
EP3436314A1 (en) 2019-02-06
FR3049536B1 (en) 2018-03-23
FR3049536A1 (en) 2017-10-06

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