WO2014128373A2 - Hinge mechanism for a vehicle seat and seat comprising such a mechanism - Google Patents

Hinge mechanism for a vehicle seat and seat comprising such a mechanism Download PDF

Info

Publication number
WO2014128373A2
WO2014128373A2 PCT/FR2014/050007 FR2014050007W WO2014128373A2 WO 2014128373 A2 WO2014128373 A2 WO 2014128373A2 FR 2014050007 W FR2014050007 W FR 2014050007W WO 2014128373 A2 WO2014128373 A2 WO 2014128373A2
Authority
WO
WIPO (PCT)
Prior art keywords
flange
locking
bosses
seat
plane
Prior art date
Application number
PCT/FR2014/050007
Other languages
French (fr)
Other versions
WO2014128373A3 (en
Inventor
Ludovic Ferre
Original Assignee
Faurecia Sièges d'Automobile
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Faurecia Sièges d'Automobile filed Critical Faurecia Sièges d'Automobile
Publication of WO2014128373A2 publication Critical patent/WO2014128373A2/en
Publication of WO2014128373A3 publication Critical patent/WO2014128373A3/en

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
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
    • B60N2/2356—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
    • B60N2/236—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls linearly movable

Definitions

  • Hinge mechanism for a vehicle seat and seat comprising such a mechanism.
  • the present invention relates to articulation mechanisms for vehicle seats and seats comprising such mechanisms.
  • the invention relates to a hinge mechanism for connecting two seat elements to allow angular adjustment between these two seat elements, the hinge mechanism comprising:
  • first and second flanges pivotally mounted relative to one another about an axis of rotation and intended to be respectively connected to the two seat elements, the second flange having an internal toothing centered on the axis of rotation,
  • At least one locking pin mounted sliding radially with respect to the axis of rotation, in a guide channel delimited between two stamped guides in the first flange, the first flange having an external face in which said guides are embossed and an inner face on which said guides protrude, the locking pin being movable between a locking position where it is engaged with said internal toothing and an unlocked position where it is not in engagement with said internal toothing,
  • FR-A-2 955 062 shows an example of such a hinge mechanism.
  • the first flange is usually welded to a flange of metal support belonging to one of the seat elements to be connected (for example the seat of the seat), by a substantially circular weld line.
  • This weld line is usually made in the outer portion of the first flange, so as to pass outside the bosses mentioned above. In some mounting configurations or with some hinge mechanism designs, however, it is not possible to make the weld line outside the bosses in question.
  • the object of the invention is in particular to propose a new articulation mechanism that can allow welding of the first flange on a support flange or the like, in this type of configuration.
  • a hinge mechanism of the kind in question is characterized in that each guide comprises first and second bosses separated by an intermediate zone, the outer face of the first flange being recessed at the level of first and second bosses but not at said intermediate zone.
  • this weld line comprising portions facing the aforementioned intermediate zones and the grain guide channel. It is thus possible to produce a weld line having a diameter sufficient to give this weld sufficient mechanical strength with respect to the rotational forces around the axis of rotation, while retaining a sufficient mechanical strength of the grain guides vis-à-vis these efforts.
  • the outer face of the first flange has a general shape extending in a plane, the portions of said outer face facing the intermediate zone and the grain guide channel being located in said plane of the outer face;
  • the outer face of the first flange has at least one flat annular region extending generally in said plane and disposed opposite said intermediate zone;
  • the intermediate zones of the guides are located substantially on the same circle centered on the axis of rotation;
  • the articulation mechanism comprises several locking grains angularly distributed about the axis of rotation, each locking pin being mounted sliding radially relative to the axis of rotation, in a guide channel delimited between two guides stamped in the first flange, the locking grains being controlled together by said control mechanism, each guide of each grain having first and second bosses separated by an intermediate zone, the respective intermediate zones of the guides being substantially equidistant relative to the axis of rotation, the outer face of the first flange being debossed at the first and second bosses of each grain but not at the intermediate zone;
  • said intermediate zone is at least 20 mm away from the axis of rotation, preferably from minus 25 mm;
  • the inner face of the first flange has a flat shape extending generally in a plane, said guide channel and said intermediate zone extending in said plane of the inner face;
  • the first flange comprises at least one reinforcing boss engaged with radial clearance in a recess of the locking grain
  • said reinforcing boss is disposed projecting in the guide channel and the locking grain has a housing open towards the first flange, in which is received said reinforcement boss with a certain radial clearance allowing the locking grain to slide between the positions locking and unlocking;
  • the inner face of the first flange has a flat shape extending generally in a plane, said guide channel extending in said plane of the internal face, said intermediate zone comprising at least one raised portion projecting from the plane the inner face, said raised portion extending radially between said first and second bosses and joining said first and second bosses;
  • said intermediate zone comprises two raised parts protruding from the plane of the inner face and surrounding a central bowl, said raised portions extending radially between said first and second bosses and joining said first and second bosses.
  • the invention also relates to a vehicle seat comprising a seat and a backrest interconnected by at least one hinge mechanism as defined above, the seat having a support flange welded to the first flange of the articulation mechanism according to at least one line substantially circumferential which extends continuously over a certain angular extent between at least two portions of the outer surface of the first flange framing the guide of the locking grain, said weld line comprising portions facing said intermediate zones and the guide channel.
  • the weld line extends substantially in a circle
  • the weld line has recess portions offset radially relative to said circle, facing additional bosses embossed hollow on the outer face of the first flange and projecting on the inner face of said first flange.
  • Figure 1 is a schematic view of a seat whose backrest is adjustable in inclination by means of at least one hinge mechanism according to one embodiment of the invention
  • FIG. 2 is a view in partial axial section showing the articulation mechanism allowing the angular adjustment of the seat back of FIG. 1,
  • FIG. 3 is a cut-away perspective view showing the first flange, the locking grains and the control device of the locking mechanism of FIG. 2;
  • FIG. 4 is a perspective view of a locking grains of FIG. 3, showing the face of this grain which is oriented towards the first flange,
  • FIG. 5 is a perspective view of the internal face of the first flange visible in FIG. 3;
  • FIG. 6 is a perspective view of the locking mechanism, seen from the side of the outer face of the first flange,
  • FIG. 7 is a view similar to FIG. 3, in a second embodiment of the invention.
  • FIG. 8 is a detailed view of one of the locking grain guides of the first flange of FIG. 7,
  • FIG. 10 is a view similar to FIG. 6, in the second embodiment of the invention.
  • the invention relates to a vehicle seat 1 which comprises a backrest 2 and a seat 3 mounted on the floor 4 of the vehicle, for example by means of slides 5.
  • the backrest 2 is pivotally mounted on the seat 3 around a transverse horizontal axis Y, by means of at least one articulation mechanism 7.
  • the articulation mechanism 7 can be controlled for example by means of a handle 6, for selectively locking or unlock the folder 2 in rotation around the Y axis.
  • the hinge mechanism 7, visible for example in FIGS. 2 and 6, comprises first and second rigid metal flanges 8, 9, generally made of steel, which are pivotally mounted relative to each other around the outside. Y axis and fixed respectively to the seat 3 and the backrest 2.
  • the outer face 8b of the first flange 8 is fixed by welding to a metal support flange 3a belonging to the structure of the seat 1, for example a flange 3a of the seat 3.
  • This welding may be in particular a laser welding by transparency, performed by sending a laser beam on the face of the flange 3a opposite the first flange 8.
  • the first and second flanges 8, 9 are for example of generally circular shape centered on the axis of rotation Y.
  • the first flange 8 may be disk-shaped and the second flange 9 may be bell-shaped whose circular base can for example be welded to a metal ring 10 which traps the first flange 8 by delimiting an interior space 11.
  • the second flange 9 has an internal circular toothing 12 (or is integral with this toothing) with which locking grooves 13, generally made by thin cutting from a steel sheet and visible in FIGS. , 3, 4.
  • the locking grains 13 are mounted sliding radially relative to the axis Y in the interior space 11, against the inner face 8a of the first flange 8.
  • the locking grains 13 may for example be three in number and angularly distributed about the Y axis. They are generally planar in shape and are all arranged in the same radial plane with respect to the Y axis. that is to say, parallel to the first flange 8. Each locking grain 13 slides in a guide channel 14 delimited between two stamped guides 15 (by thin cutting, called “semi-cutting") in the first flange.
  • each guide 15 comprises two embossed bosses 16, 17 aligned substantially radially with respect to the Y axis, radially separated by an unembossed intermediate zone 18, so that the portion of the outer face 8b of the first flange located at this intermediate zone 18, is flat and included in the general plane of said outer face 8b, as well as the zones corresponding to the guides 14 of the locking grains.
  • the inner face 8a of the first flange has a flat shape extending generally in a radial plane, each guide channel 14 and each intermediate zone 18 extending in said plane of the inner face.
  • each locking groove 13 extends, radially with respect to the Y axis, between a rear edge 19 and a front edge forming a toothing 20, said locking pin 13 being movable in the corresponding guide 14 between a locking position where it is engaged with the internal toothing 12 of the second flange 9, and an unlocked position where it is moved radially inwards and is not engaged with said internal toothing 12.
  • Each locking grain 13 may optionally comprise two pins 21, 22 projecting on the face 13a of the locking grain opposite the first flange 8, these pins being formed by fine stamping (called “semi-cutting") by delimiting corresponding recesses 21a 22a in the face 13b of the locking grain facing the first flange 8.
  • the first flange 8 may comprise reinforcing bosses 23 (FIGS. 2, 5, 6) formed for example by fine stamping and helping to strengthen the connection of each locking grain 13 with the first flange 8.
  • Said reinforcement boss 23 is disposed protruding in the guide channel 14 of the corresponding locking grain and is received for example in the above-mentioned recess 22a of the locking grain, substantially without play in the circumferential direction but with a certain radial clearance allowing the locking grain to slide between the above-mentioned locking and unlocking positions.
  • the inner space 11 of the hinge mechanism also comprises a control device 24 adapted to move the locking grains between said locking and unlocking positions.
  • This control mechanism comprises for example:
  • a central metal control cam integral with the handle 6 and shaped to push the locking grains by their rear edges 19, towards their locking position when the control cam is in the rest position, this control cam 25 being in the same radial plane as the locking grains 13,
  • resilient means biasing the control cam towards its rest position, these elastic means being here constituted for example by two spiral springs 26 acting on jaws of the cam and mounted for example on hooking bosses 27 made for example by stamping end and protruding on the inner face 8a of the first flange,
  • the hinge mechanism 7 is unlocked and allows the user to adjust the inclination of the folder 2 by acting directly on the folder, after which the folder is locked again in position by the articulation mechanism 7 when the user releases the handle 6.
  • the first flange 8 on the seat flange 3a may be weld along a substantially circular line 30 (or more generally, a continuous line extending preferably over 360 degrees around the axis Y) passing through the intermediate zones 18 of the guides 15.
  • a substantially circular line 30 or more generally, a continuous line extending preferably over 360 degrees around the axis Y
  • the outer surface 8b of the first flange 8 is flat and included in the same radial plane along the line 30, which allows welding in good conditions.
  • This circular line 30 has a radius of at least 20 mm from the axis of rotation, preferably at least 25 mm with respect to the Y axis, so that the weld line has a diameter sufficient to give the fixation sufficient mechanical strength vis-à-vis the rotational forces around the axis of rotation Y (for example an ultimate resistance at least equal to 2000 Nm), while maintaining a sufficient mechanical strength of the guides 15 grains vis- to these efforts.
  • the mechanical strength of the connection between the first flange 8 and the locking grains 13 is further reinforced by the presence of reinforcement bosses 23.
  • weld line 30 may have recess portions 31 (for example in semicircles in the present case) offset radially with respect to the remainder of the circular line 30, so that said line 30 does not pass over embossed bosses in the first flange 8, for example here the reinforcing bosses 23 and the hooking bosses 27.
  • each guide 15 comprises, as before, two embossed bosses 16a, 17a separated by an intermediate zone 18a which, on the side of the outer face 8b of the first flange, is included in the plane of said outer surface, but which, on the inside face 8a, comprises a stamped bowl 32 flanked by two embossed portions 33 also embossed projecting from the plane of the inner face 8a, each raised portion 33 extending radially between said first and second bosses 16a, 17a and joining said first and second bosses, which makes it possible to reinforce the mechanical strength of the guides 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

A hinge mechanism comprising first and second pivoting flanges, the second flange comprising an internal toothing with which locking beads (13) can engage, each locking bead being mounted radially slidable between two guides (15) stamped into the first flange (8). Each guide comprises two bosses (16, 17) separated by an intermediate area (18), the outer face of the first flange being indent-stamped at said bosses (16, 17) but not at the intermediate area (18).

Description

Mécanisme d'articulation pour siège de véhicule et siège comportant un tel mécanisme . Hinge mechanism for a vehicle seat and seat comprising such a mechanism.
DOMAINE DE L'INVENTION FIELD OF THE INVENTION
La présente invention est relative aux mécanismes d'articulation pour sièges de véhicules et aux sièges comportant de tels mécanismes.  The present invention relates to articulation mechanisms for vehicle seats and seats comprising such mechanisms.
Plus particulièrement, l'invention concerne un mécanisme d'articulation destiné à relier deux éléments de siège pour permettre un réglage angulaire entre ces deux éléments de siège, ce mécanisme d'articulation comportant :  More particularly, the invention relates to a hinge mechanism for connecting two seat elements to allow angular adjustment between these two seat elements, the hinge mechanism comprising:
des premier et deuxième flasques montés pivotants l'un par rapport à l'autre autour d'un axe de rotation et destinés à être reliés respectivement aux deux éléments de siège, le deuxième flasque comportant une denture interne centrée sur l'axe de rotation,  first and second flanges pivotally mounted relative to one another about an axis of rotation and intended to be respectively connected to the two seat elements, the second flange having an internal toothing centered on the axis of rotation,
- au moins un grain de verrouillage monté coulissant radialement par rapport à l'axe de rotation, dans un canal de guidage délimité entre deux guides estampés dans le premier flasque, le premier flasque présentant une face externe dans laquelle lesdits guides sont estampés en creux et une face interne sur laquelle font saillie lesdits guides, le grain de verrouillage étant mobile entre une position de verrouillage où il est en prise avec ladite denture interne et une position déverrouillée où il n'est pas en prise avec ladite denture interne ,  at least one locking pin mounted sliding radially with respect to the axis of rotation, in a guide channel delimited between two stamped guides in the first flange, the first flange having an external face in which said guides are embossed and an inner face on which said guides protrude, the locking pin being movable between a locking position where it is engaged with said internal toothing and an unlocked position where it is not in engagement with said internal toothing,
et un dispositif de commande adapté pour déplacer ledit grain de verrouillage entre lesdites positions de verrouillage et de déverrouillage.  and a control device adapted to move said locking grain between said locking and unlocking positions.
ARRIERE-PLAN DE L'INVENTION  BACKGROUND OF THE INVENTION
Le document FR-A- 2 955 062 montre un exemple d'un tel mécanisme d'articulation.  FR-A-2 955 062 shows an example of such a hinge mechanism.
Dans les mécanismes d'articulation de ce type, le premier flasque est habituellement soudé sur un flasque de support métallique appartenant à l'un des éléments de siège à relier (par exemple l'assise du siège), par une ligne de soudure sensiblement circulaire. Cette ligne de soudure est habituellement réalisée dans la partie externe du premier flasque, de façon à passer à l'extérieur des bossages susmentionnés. Dans certaines configurations de montage ou avec certaines conceptions de mécanisme d'articulation, il n'est toutefois pas possible de réaliser la ligne de soudure à l'extérieur des bossages en question . In articulation mechanisms of this type, the first flange is usually welded to a flange of metal support belonging to one of the seat elements to be connected (for example the seat of the seat), by a substantially circular weld line. This weld line is usually made in the outer portion of the first flange, so as to pass outside the bosses mentioned above. In some mounting configurations or with some hinge mechanism designs, however, it is not possible to make the weld line outside the bosses in question.
OBJETS DE L'INVENTION  OBJECTS OF THE INVENTION
L'invention a notamment pour but de proposer un nouveau mécanisme d'articulation qui puisse permettre un soudage du premier flasque sur un flasque de support ou similaire, dans ce type de configuration.  The object of the invention is in particular to propose a new articulation mechanism that can allow welding of the first flange on a support flange or the like, in this type of configuration.
A cet effet, selon l'invention, un mécanisme d'articulation du genre en question est caractérisé en ce que chaque guide comporte des premier et deuxième bossages séparés par une zone intermédiaire, la face externe du premier flasque étant estampée en creux au niveau des premier et deuxième bossages mais non au niveau de ladite zone intermédiaire.  For this purpose, according to the invention, a hinge mechanism of the kind in question is characterized in that each guide comprises first and second bosses separated by an intermediate zone, the outer face of the first flange being recessed at the level of first and second bosses but not at said intermediate zone.
Grâce à ces dispositions, on peut souder le premier flasque sur un flasque de support ou similaire selon une ligne de soudure sensiblement circonférentielle qui s'étend continûment sur une certaine étendue angulaire entre au moins deux portions de la surface extérieure du premier flasque encadrant le guide du grain, cette ligne de soudure comprenant des parties en regard des zones intermédiaires susmentionnées et du canal de guidage du grain. On peut ainsi réaliser une ligne de soudure ayant un diamètre suffisant pour conférer à cette soudure une résistance mécanique suffisante vis-à-vis des efforts de rotation autour de l'axe de rotation, tout en conservant une résistance mécanique suffisante des guides des grains vis-à-vis de ces efforts. Thanks to these arrangements, it is possible to weld the first flange to a support flange or the like along a substantially circumferential weld line that extends continuously over a certain angular extent between at least two portions of the outer surface of the first flange flanking the guide. grain, this weld line comprising portions facing the aforementioned intermediate zones and the grain guide channel. It is thus possible to produce a weld line having a diameter sufficient to give this weld sufficient mechanical strength with respect to the rotational forces around the axis of rotation, while retaining a sufficient mechanical strength of the grain guides vis-à-vis these efforts.
Dans divers modes de réalisation du mécanisme d'articulation selon l'invention, on peut éventuellement avoir recours en outre à l'une et/ou à l'autre des dispositions suivantes :  In various embodiments of the hinge mechanism according to the invention, one or more of the following provisions may also be used:
- la face externe du premier flasque présente une forme générale s 'étendant dans un plan, les parties de ladite face externe situées en regard de la zone intermédiaire et du canal de guidage du grain étant situées dans ledit plan de la face externe ;  - The outer face of the first flange has a general shape extending in a plane, the portions of said outer face facing the intermediate zone and the grain guide channel being located in said plane of the outer face;
- la face externe du premier flasque présente au moins une région annulaire plate s 'étendant généralement dans ledit plan et disposée en regard de ladite zone intermédiaire ;  - The outer face of the first flange has at least one flat annular region extending generally in said plane and disposed opposite said intermediate zone;
les zones intermédiaires des guides sont situées sensiblement sur un même cercle centré sur l'axe de rotation ;  the intermediate zones of the guides are located substantially on the same circle centered on the axis of rotation;
le mécanisme d'articulation comprend plusieurs grains de verrouillage répartis angulairement autour de l'axe de rotation, chaque grain de verrouillage étant monté coulissant radialement par rapport à l'axe de rotation, dans un canal de guidage délimité entre deux guides estampés dans le premier flasque, les grains de verrouillage étant commandés ensemble par ledit mécanisme de commande, chaque guide de chaque grain comportant des premier et deuxième bossages séparés par une zone intermédiaire, les zones intermédiaires respectives des guides étant sensiblement équidistantes par rapport à l'axe de rotation, la face externe du premier flasque étant estampée en creux au niveau des premier et deuxième bossages de chaque grain mais non au niveau de la zone intermédiaire ;  the articulation mechanism comprises several locking grains angularly distributed about the axis of rotation, each locking pin being mounted sliding radially relative to the axis of rotation, in a guide channel delimited between two guides stamped in the first flange, the locking grains being controlled together by said control mechanism, each guide of each grain having first and second bosses separated by an intermediate zone, the respective intermediate zones of the guides being substantially equidistant relative to the axis of rotation, the outer face of the first flange being debossed at the first and second bosses of each grain but not at the intermediate zone;
ladite zone intermédiaire est distante d'au moins 20 mm de l'axe de rotation, préfèrentiellement d'au moins 25 mm ; said intermediate zone is at least 20 mm away from the axis of rotation, preferably from minus 25 mm;
- la face interne du premier flasque présente une forme plate s 'étendant généralement dans un plan, ledit canal de guidage et ladite zone intermédiaire s 'étendant dans ledit plan de la face interne ;  - The inner face of the first flange has a flat shape extending generally in a plane, said guide channel and said intermediate zone extending in said plane of the inner face;
le premier flasque comporte au moins un bossage de renfort engagé avec jeu radial dans un évidement du grain de verrouillage ;  the first flange comprises at least one reinforcing boss engaged with radial clearance in a recess of the locking grain;
ledit bossage de renfort est disposé en saillie dans le canal de guidage et le grain de verrouillage comporte un logement ouvert vers le premier flasque, dans lequel est reçu ledit bossage de renfort avec un certain jeu radial permettant au grain de verrouillage de coulisser entre les positions de verrouillage et de déverrouillage ;  said reinforcing boss is disposed projecting in the guide channel and the locking grain has a housing open towards the first flange, in which is received said reinforcement boss with a certain radial clearance allowing the locking grain to slide between the positions locking and unlocking;
- la face interne du premier flasque présente une forme plate s 'étendant généralement dans un plan, ledit canal de guidage s 'étendant dans ledit plan de la face interne, ladite zone intermédiaire comportant au moins une partie en relief faisant saillie par rapport au plan de la face interne, ladite partie en relief s 'étendant radialement entre lesdits premier et deuxième bossages et rejoignant lesdits premier et deuxième bossages ;  the inner face of the first flange has a flat shape extending generally in a plane, said guide channel extending in said plane of the internal face, said intermediate zone comprising at least one raised portion projecting from the plane the inner face, said raised portion extending radially between said first and second bosses and joining said first and second bosses;
ladite zone intermédiaire comporte deux parties en relief faisant saillie par rapport au plan de la face interne et encadrant une cuvette centrale, lesdites parties en relief s 'étendant radialement entre lesdits premier et deuxième bossages et rejoignant lesdits premier et deuxième bossages.  said intermediate zone comprises two raised parts protruding from the plane of the inner face and surrounding a central bowl, said raised portions extending radially between said first and second bosses and joining said first and second bosses.
Par ailleurs, l'invention a également pour objet un siège de véhicule comportant une assise et un dossier reliés entre eux par au moins un mécanisme d'articulation tel que défini ci-dessus, le siège comportant un flasque de support soudé au premier flasque du mécanisme d'articulation selon au moins une ligne sensiblement circonférentielle qui s'étend continûment sur une certaine étendue angulaire entre au moins deux portions de la surface extérieure du premier flasque encadrant le guide du grain de verrouillage, cette ligne de soudure comprenant des parties en regard des zones intermédiaires susmentionnées et du canal de guidage. Furthermore, the invention also relates to a vehicle seat comprising a seat and a backrest interconnected by at least one hinge mechanism as defined above, the seat having a support flange welded to the first flange of the articulation mechanism according to at least one line substantially circumferential which extends continuously over a certain angular extent between at least two portions of the outer surface of the first flange framing the guide of the locking grain, said weld line comprising portions facing said intermediate zones and the guide channel.
Dans divers modes de réalisation du siège selon l'invention, on peut éventuellement avoir recours en outre à l'une et/ou à l'autre des dispositions suivantes :  In various embodiments of the seat according to the invention, one can optionally also resort to one and / or the other of the following provisions:
- la ligne de soudure s'étend sensiblement selon un cercle ;  - The weld line extends substantially in a circle;
la ligne de soudure présente des portions de décrochement décalées radialement par rapport audit cercle, en regard de bossages supplémentaires estampés en creux sur la face externe du premier flasque et faisant saillie sur la face interne dudit premier flasque.  the weld line has recess portions offset radially relative to said circle, facing additional bosses embossed hollow on the outer face of the first flange and projecting on the inner face of said first flange.
BREVE DESCRIPTION DES DESSINS  BRIEF DESCRIPTION OF THE DRAWINGS
D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description suivante de deux de ses formes de réalisation, données à titre d'exemples non limitatifs, en regard des dessins j oints .  Other characteristics and advantages of the invention will emerge during the following description of two of its embodiments, given by way of non-limiting examples, with reference to the accompanying drawings.
Sur les dessins :  On the drawings:
la figure 1 est une vue schématique d'un siège dont le dossier est réglable en inclinaison au moyen d'au moins un mécanisme d'articulation selon une forme de réalisation de l'invention,  Figure 1 is a schematic view of a seat whose backrest is adjustable in inclination by means of at least one hinge mechanism according to one embodiment of the invention,
- la figure 2 est une vue en coupe axiale partielle montrant le mécanisme d'articulation permettant le réglage angulaire du dossier du siège de la figure 1,  FIG. 2 is a view in partial axial section showing the articulation mechanism allowing the angular adjustment of the seat back of FIG. 1,
- la figure 3 est une vue en perspective écorchée, montrant le premier flasque, les grains de verrouillage et le dispositif de commande du mécanisme de verrouillage de la figure 2,  FIG. 3 is a cut-away perspective view showing the first flange, the locking grains and the control device of the locking mechanism of FIG. 2;
- la figure 4 est une vue en perspective d'une des grains de verrouillage de la figure 3, montrant la face de ce grain qui est orientée vers le premier flasque, FIG. 4 is a perspective view of a locking grains of FIG. 3, showing the face of this grain which is oriented towards the first flange,
- la figure 5 est une vue en perspective de la face interne du premier flasque visible sur la figure 3,  FIG. 5 is a perspective view of the internal face of the first flange visible in FIG. 3;
- la figure 6 est une vue en perspective du mécanisme de verrouillage, vu du côté de la face externe du premier flasque,  FIG. 6 is a perspective view of the locking mechanism, seen from the side of the outer face of the first flange,
- la figure 7 est une vue similaire à la figure 3, dans une deuxième forme de réalisation de l'invention,  FIG. 7 is a view similar to FIG. 3, in a second embodiment of the invention,
- la figure 8 est une vue de détail d'un des guides de grain de verrouillage du premier flasque de la figure 7,  FIG. 8 is a detailed view of one of the locking grain guides of the first flange of FIG. 7,
la figure 9 et une vue en coupe selon la ligne IX-IX de la figure 8,  FIG. 9 and a sectional view along the line IX-IX of FIG. 8,
- et la figure 10 est une vue similaire à la figure 6, dans la deuxième forme de réalisation de 1 ' invention .  and FIG. 10 is a view similar to FIG. 6, in the second embodiment of the invention.
DESCRIPTION PLUS DETAILLEE  DESCRIPTION DETAILED
Sur les différentes figures, les mêmes références désignent des éléments identiques ou similaires.  In the different figures, the same references designate identical or similar elements.
Comme représenté schématiquement sur la figure 1, l'invention concerne un siège de véhicule 1 qui comporte un dossier 2 et une assise 3 montée sur le plancher 4 du véhicule, par exemple par l'intermédiaire de glissières 5. Le dossier 2 est monté pivotant sur l'assise 3 autour d'un axe horizontal transversal Y, au moyen d'au moins un mécanisme d'articulation 7. Le mécanisme d'articulation 7 peut être commandé par exemple au moyen d'une poignée 6, permettant de sélectivement bloquer ou débloquer le dossier 2 en rotation autour de l'axe Y.  As shown schematically in Figure 1, the invention relates to a vehicle seat 1 which comprises a backrest 2 and a seat 3 mounted on the floor 4 of the vehicle, for example by means of slides 5. The backrest 2 is pivotally mounted on the seat 3 around a transverse horizontal axis Y, by means of at least one articulation mechanism 7. The articulation mechanism 7 can be controlled for example by means of a handle 6, for selectively locking or unlock the folder 2 in rotation around the Y axis.
Le mécanisme d'articulation 7, visible par exemple sur les figures 2 et 6, comporte des premier et deuxième flasques métalliques rigides 8, 9, réalisés généralement en acier, qui sont montés pivotants l'un par rapport à l'autre autour de l'axe de rotation Y et fixés respectivement à l'assise 3 et au dossier 2. La face externe 8b du premier flasque 8 est fixé par soudure à un flasque de support métallique 3a appartenant à la structure du siège 1, par exemple un flasque 3a de l'assise 3. Cette soudure peut être notamment une soudure laser par transparence, réalisée en envoyant un rayon laser sur la face du flasque 3a opposée au premier flasque 8. The hinge mechanism 7, visible for example in FIGS. 2 and 6, comprises first and second rigid metal flanges 8, 9, generally made of steel, which are pivotally mounted relative to each other around the outside. Y axis and fixed respectively to the seat 3 and the backrest 2. The outer face 8b of the first flange 8 is fixed by welding to a metal support flange 3a belonging to the structure of the seat 1, for example a flange 3a of the seat 3. This welding may be in particular a laser welding by transparency, performed by sending a laser beam on the face of the flange 3a opposite the first flange 8.
Les premier et deuxième flasques 8, 9 sont par exemple de forme générale circulaire centrée sur l'axe de rotation Y. Le premier flasque 8 peut être en forme de disque et le deuxième flasque 9 peut être en forme de cloche dont la base circulaire peut par exemple être soudée à une bague métallique 10 qui emprisonne le premier flasque 8 en délimitant un espace intérieur 11.  The first and second flanges 8, 9 are for example of generally circular shape centered on the axis of rotation Y. The first flange 8 may be disk-shaped and the second flange 9 may be bell-shaped whose circular base can for example be welded to a metal ring 10 which traps the first flange 8 by delimiting an interior space 11.
Le deuxième flasque 9 comporte une denture circulaire interne 12 (ou est solidaire de cette denture) avec laquelle peuvent venir en prise des grains de verrouillage 13, généralement réalisés par découpage fin à partir d'une tôle d'acier et visibles sur les figures 2, 3, 4. Les grains de verrouillage 13 sont montés coulissants radialement par rapport à l'axe Y dans l'espace intérieur 11, contre la face interne 8a du premier flasque 8.  The second flange 9 has an internal circular toothing 12 (or is integral with this toothing) with which locking grooves 13, generally made by thin cutting from a steel sheet and visible in FIGS. , 3, 4. The locking grains 13 are mounted sliding radially relative to the axis Y in the interior space 11, against the inner face 8a of the first flange 8.
Plus précisément, les grains de verrouillage 13 peuvent par exemple être au nombre de trois et sont répartis angulairement autour de l'axe Y. Ils sont de forme générale plane et sont tous disposés dans un même plan radial para rapport à l'axe Y, c'est-à-dire parallèle au premier flasque 8. Chaque grain de verrouillage 13 coulisse dans un canal de guidage 14 délimité entre deux guides 15 estampés (par découpage fin, dit "semi-découpe" ) dans le premier flasque.  More specifically, the locking grains 13 may for example be three in number and angularly distributed about the Y axis. They are generally planar in shape and are all arranged in the same radial plane with respect to the Y axis. that is to say, parallel to the first flange 8. Each locking grain 13 slides in a guide channel 14 delimited between two stamped guides 15 (by thin cutting, called "semi-cutting") in the first flange.
Les guides 15 sont estampés en creux dans la face externe 8b du premier flasque font saillie sur la face interne 8a dudit premier flasque. Comme représenté plus en détail sur les figures 5 et 6, chaque guide 15 comporte deux bossages estampés 16, 17 alignés sensiblement radialement par rapport à l'axe Y, séparés radialement par une zone intermédiaire 18 non-estampée, de sorte que la partie de la face externe 8b du premier flasque située au niveau de cette zone intermédiaire 18, est plate et comprise dans le plan général de ladite face externe 8b, de même que les zones correspondant aux guides 14 des grains de verrouillage. De la même façon, la face interne 8a du premier flasque présente une forme plate s 'étendant généralement dans un plan radial, chaque canal de guidage 14 et chaque zone intermédiaire 18 s 'étendant dans ledit plan de la face interne. The guides 15 are embossed in the outer face 8b of the first flange protrude on the face internal 8a of said first flange. As shown in more detail in FIGS. 5 and 6, each guide 15 comprises two embossed bosses 16, 17 aligned substantially radially with respect to the Y axis, radially separated by an unembossed intermediate zone 18, so that the portion of the outer face 8b of the first flange located at this intermediate zone 18, is flat and included in the general plane of said outer face 8b, as well as the zones corresponding to the guides 14 of the locking grains. In the same way, the inner face 8a of the first flange has a flat shape extending generally in a radial plane, each guide channel 14 and each intermediate zone 18 extending in said plane of the inner face.
Comme représenté sur les figures 2 à 5, chaque grain de verrouillage 13 s'étend, radialement par rapport à l'axe Y, entre un bord arrière 19 et un bord avant formant une denture 20, ledit grain de verrouillage 13 étant mobile dans le guide 14 correspondant entre une position de verrouillage où il est en prise avec la denture interne 12 du deuxième flasque 9, et une position déverrouillée où il est déplacé radialement vers l'intérieur et n'est pas en prise avec ladite denture interne 12. Chaque grain de verrouillage 13 peut éventuellement comporter deux pions 21, 22 faisant saillie sur la face 13a du grain de verrouillage opposée au premier flasque 8, ce pions pouvant être formés par estampage fin (dit "semi-découpe" ) en délimitant des évidements correspondants 21a, 22a dans la face 13b du grain de verrouillage faisant face au premier flasque 8.  As shown in FIGS. 2 to 5, each locking groove 13 extends, radially with respect to the Y axis, between a rear edge 19 and a front edge forming a toothing 20, said locking pin 13 being movable in the corresponding guide 14 between a locking position where it is engaged with the internal toothing 12 of the second flange 9, and an unlocked position where it is moved radially inwards and is not engaged with said internal toothing 12. Each locking grain 13 may optionally comprise two pins 21, 22 projecting on the face 13a of the locking grain opposite the first flange 8, these pins being formed by fine stamping (called "semi-cutting") by delimiting corresponding recesses 21a 22a in the face 13b of the locking grain facing the first flange 8.
Avantageusement, le premier flasque 8 peut comporter des bossages de renfort 23 (figures 2, 5, 6) formés par exemple par estampage fin et contribuant à renforcer la liaison de chaque grain de verrouillage 13 avec le premier flasque 8. Ledit bossage de renfort 23 est disposé en saillie dans le canal de guidage 14 du grain de verrouillage correspondant et est reçu par exemple dans 1 ' évidement 22a susmentionné du grain de verrouillage, sensiblement sans jeu en direction circonférentielle mais avec un certain jeu radial permettant au grain de verrouillage de coulisser entre les positions de verrouillage et de déverrouillage susmentionnées. Advantageously, the first flange 8 may comprise reinforcing bosses 23 (FIGS. 2, 5, 6) formed for example by fine stamping and helping to strengthen the connection of each locking grain 13 with the first flange 8. Said reinforcement boss 23 is disposed protruding in the guide channel 14 of the corresponding locking grain and is received for example in the above-mentioned recess 22a of the locking grain, substantially without play in the circumferential direction but with a certain radial clearance allowing the locking grain to slide between the above-mentioned locking and unlocking positions.
Par ailleurs, l'espace intérieur 11 du mécanisme d'articulation comporte également un dispositif de commande 24 adapté pour déplacer les grains de verrouillage entre lesdites positions de verrouillage et de déverrouillage. Ce mécanisme de commande comporte par exemple :  Furthermore, the inner space 11 of the hinge mechanism also comprises a control device 24 adapted to move the locking grains between said locking and unlocking positions. This control mechanism comprises for example:
une came de commande centrale 25 métallique, solidaire de la poignée 6 et conformée pour repousser les grains de verrouillage par leurs bords arrière 19, vers leur position de verrouillage lorsque la came de commande est en position de repos, cette came de commande 25 étant dans le même plan radial que les grains de verrouillage 13,  a central metal control cam, integral with the handle 6 and shaped to push the locking grains by their rear edges 19, towards their locking position when the control cam is in the rest position, this control cam 25 being in the same radial plane as the locking grains 13,
des moyens élastiques sollicitant la came de commande vers sa position de repos, ces moyens élastiques étant ici constitués par exemple par deux ressorts spirale 26 agissant sur des becs de la came et montés par exemple sur des bossages d'accrochage 27 réalisés par exemple par estampage fin et faisant saillie sur la face interne 8a du premier flasque,  resilient means biasing the control cam towards its rest position, these elastic means being here constituted for example by two spiral springs 26 acting on jaws of the cam and mounted for example on hooking bosses 27 made for example by stamping end and protruding on the inner face 8a of the first flange,
un masque de commande 28 solidaire de la came de commande 25, constitué par une tôle découpée sensiblement circulaire recouvrant la came de commande 25 et les grains de verrouillage 13, ce masque de commande étant doté de fenêtres 29 qui reçoivent les pions 21 des grains de verrouillage, tandis que les pions 22 desdits grains sont à l'extérieur du masque de commande 28 : ces fenêtres 29 sont conformées pour faire coulisser les grains de verrouillage radialement vers l'intérieur jusqu'en position de déverrouillage lorsque la poignée 6 susmentionnée est actionnée en faisant tourner à la fois le masque de commande et la came de commande vers une position active (la came de commande est conformée, quant à elle, pour ne pas interférer avec ce mouvement des grains dès lors qu'elle n'est plus en position de repos) . a control mask 28 integral with the control cam 25, consisting of a substantially circular cut sheet covering the control cam 25 and the locking grains 13, this control mask being provided with windows 29 which receive the pins 21 of the grains of locking, while the pins 22 of said grains are outside the control mask 28: these windows 29 are shaped to slide the locking grains radially inwards to the unlocking position when the aforementioned handle 6 is actuated by rotating both the control mask and the control cam to an active position (the control cam is shaped, as to it, so as not to interfere with this grain movement since it is no longer in the rest position).
Ainsi, lorsqu'un utilisateur actionne la poignée 6 du siège, le mécanisme d'articulation 7 est débloqué et permet à l'utilisateur de régler l'inclinaison du dossier 2 en agissant directement sur ce dossier, après quoi le dossier est à nouveau verrouillé en position par le mécanisme d'articulation 7 lorsque l'utilisateur relâche la poignée 6.  Thus, when a user actuates the handle 6 of the seat, the hinge mechanism 7 is unlocked and allows the user to adjust the inclination of the folder 2 by acting directly on the folder, after which the folder is locked again in position by the articulation mechanism 7 when the user releases the handle 6.
Grâce à la présence des zones intermédiaires 18 dans les guides 15, il est possible de souder le premier flasque 8 sur le flasque d'assise 3a selon une ligne sensiblement circulaire 30 (ou plus généralement, une ligne continue, s 'étendant préfèrentiellement sur 360 degrés autour de l'axe Y) passant par les zones intermédiaires 18 des guides 15. En effet, la surface extérieure 8b du premier flasque 8 est plate et comprise dans un même plan radial le long de cette ligne 30, ce qui permet de souder dans de bonnes conditions. Cette ligne circulaire 30 présente un rayon d'au moins 20 mm de l'axe de rotation, préfèrentiellement d'au moins 25 mm par rapport à l'axe Y, de sorte que la ligne de soudure a un diamètre suffisant pour conférer à la fixation une résistance mécanique suffisante vis-à-vis des efforts de rotation autour de l'axe de rotation Y (par exemple une résistance ultime au moins égale à 2000 N.m) , tout en conservant une résistance mécanique suffisante des guides 15 des grains vis-à-vis de ces efforts. La résistance mécanique de la liaison entre le premier flasque 8 et les grains de verrouillage 13 est en outre renforcée par la présence des bossages de renfort 23. Due to the presence of the intermediate zones 18 in the guides 15, it is possible to weld the first flange 8 on the seat flange 3a along a substantially circular line 30 (or more generally, a continuous line extending preferably over 360 degrees around the axis Y) passing through the intermediate zones 18 of the guides 15. Indeed, the outer surface 8b of the first flange 8 is flat and included in the same radial plane along the line 30, which allows welding in good conditions. This circular line 30 has a radius of at least 20 mm from the axis of rotation, preferably at least 25 mm with respect to the Y axis, so that the weld line has a diameter sufficient to give the fixation sufficient mechanical strength vis-à-vis the rotational forces around the axis of rotation Y (for example an ultimate resistance at least equal to 2000 Nm), while maintaining a sufficient mechanical strength of the guides 15 grains vis- to these efforts. The mechanical strength of the connection between the first flange 8 and the locking grains 13 is further reinforced by the presence of reinforcement bosses 23.
On notera que la ligne de soudure 30 peut présenter des portions de décrochement 31 (par exemple en demi-cercles dans le cas présent) décalées radialement par rapport au reste de la ligne circulaire 30, de façon que ladite ligne 30 ne passe pas sur des bossages estampés dans le premier flasque 8, par exemple ici les bossages de renfort 23 et les bossages d'accrochage 27.  It will be noted that the weld line 30 may have recess portions 31 (for example in semicircles in the present case) offset radially with respect to the remainder of the circular line 30, so that said line 30 does not pass over embossed bosses in the first flange 8, for example here the reinforcing bosses 23 and the hooking bosses 27.
La deuxième forme de réalisation de l'invention, représentée sur les figures 7 à 10, est similaire à la première forme de réalisation décrite ci-dessus et ne sera donc pas décrite à nouveau en totalité. Cette deuxième forme de réalisation se distingue de la première forme de réalisation uniquement par les points suivants :  The second embodiment of the invention, shown in Figures 7 to 10, is similar to the first embodiment described above and therefore will not be described again in full. This second embodiment is distinguished from the first embodiment only by the following points:
- les bossages de renfort 23 sont supprimés,  the reinforcement bosses 23 are removed,
chaque guide 15 comporte comme précédemment deux bossages estampés 16a, 17a séparés par une zone intermédiaire 18a qui, du côté de la face externe 8b du premier flasque, est comprise dans le plan de ladite surface externe, mais qui, du côté de la face interne 8a, comporte une cuvette estampée 32 encadrée par deux parties en relief 33 également estampées faisant saillie par rapport au plan de la face interne 8a, chaque partie en relief 33 s 'étendant radialement entre lesdits premier et deuxième bossages 16a, 17a et rejoignant lesdits premier et deuxième bossages, ce qui permet de renforcer la résistance mécanique des guides 15.  each guide 15 comprises, as before, two embossed bosses 16a, 17a separated by an intermediate zone 18a which, on the side of the outer face 8b of the first flange, is included in the plane of said outer surface, but which, on the inside face 8a, comprises a stamped bowl 32 flanked by two embossed portions 33 also embossed projecting from the plane of the inner face 8a, each raised portion 33 extending radially between said first and second bosses 16a, 17a and joining said first and second bosses, which makes it possible to reinforce the mechanical strength of the guides 15.

Claims

REVENDICATIONS
1. Mécanisme d'articulation destiné à relier deux éléments de siège pour permettre un réglage angulaire entre ces deux éléments de siège, ce mécanisme d'articulation comportant : A hinge mechanism for connecting two seat elements to allow angular adjustment between these two seat elements, said hinge mechanism comprising:
des premier et deuxième flasques (8, 9) montés pivotants l'un par rapport à l'autre autour d'un axe de rotation (Y) et destinés à être reliés respectivement aux deux éléments de siège, le deuxième flasque (9) comportant une denture interne (12) centrée sur l'axe de rotation,  first and second flanges (8, 9) pivotally mounted relative to one another about an axis of rotation (Y) and intended to be respectively connected to the two seat elements, the second flange (9) comprising an internal toothing (12) centered on the axis of rotation,
- au moins un grain de verrouillage (13) monté coulissant radialement par rapport à l'axe de rotation, dans un canal de guidage (14) délimité entre deux guides (15) estampés dans le premier flasque (8), le premier flasque présentant une face externe (8b) dans laquelle lesdits guides (15) sont estampés en creux et une face interne (8a) sur laquelle font saillie lesdits guides, le grain de verrouillage (13) étant mobile entre une position de verrouillage où il est en prise avec ladite denture interne (12) et une position déverrouillée où il n'est pas en prise avec ladite denture interne,  - At least one locking pin (13) mounted to slide radially relative to the axis of rotation, in a guide channel (14) delimited between two guides (15) stamped in the first flange (8), the first flange having an outer face (8b) in which said guides (15) are recessed and an inner face (8a) on which said guides protrude, the locking pin (13) being movable between a locking position where it is engaged with said internal toothing (12) and an unlocked position where it is not engaged with said internal toothing,
et un dispositif de commande (24) adapté pour déplacer ledit grain de verrouillage (13) entre lesdites positions de verrouillage et de déverrouillage,  and a control device (24) adapted to move said locking grain (13) between said locking and unlocking positions,
caractérisé en ce que chaque guide (15) comporte des premier et deuxième bossages (16, 17 ; 16a, 17a) séparés par une zone intermédiaire (18 ; 18a), la face externe (8b) du premier flasque étant estampée en creux au niveau des premier et deuxième bossages (16, 17 ; 16a, 17a) mais non au niveau de ladite zone intermédiaire (18 ; 18a) . characterized in that each guide (15) has first and second bosses (16, 17; 16a, 17a) separated by an intermediate zone (18; 18a), the outer face (8b) of the first flange being recessed at the hollow first and second bosses (16, 17; 16a, 17a) but not at said intermediate zone (18; 18a).
2. Mécanisme selon la revendication 1, dans lequel la face externe (8b) du premier flasque présente une forme générale s 'étendant dans un plan, les parties de ladite face externe (8b) situées en regard de la zone intermédiaire (18 ; 18a) et du canal de guidage (14) du grain étant situées dans ledit plan de la face externe. 2. Mechanism according to claim 1, wherein the outer face (8b) of the first flange has a general shape extending in a plane, the portions of said outer face (8b) located opposite the zone. intermediate (18; 18a) and the guiding channel (14) of the grain being located in said plane of the outer face.
3. Mécanisme selon la revendication 2, dans lequel la face externe (8b) du premier flasque présente au moins une région annulaire plate s 'étendant généralement dans ledit plan et disposée en regard de ladite zone intermédiaire (18 ; 18a) .  3. Mechanism according to claim 2, wherein the outer face (8b) of the first flange has at least one flat annular region extending generally in said plane and disposed opposite said intermediate zone (18; 18a).
4. Mécanisme selon l'une quelconque des revendications précédentes, dans lequel les zones intermédiaires (18 ; 18a) des guides (15) sont situées sensiblement sur un même cercle (30) centré sur l'axe de rotation (Y) .  4. Mechanism according to any one of the preceding claims, wherein the intermediate zones (18; 18a) of the guides (15) are located substantially on the same circle (30) centered on the axis of rotation (Y).
5. Mécanisme selon l'une quelconque des revendications précédentes, comprenant plusieurs grains de verrouillage (13) répartis angulairement autour de l'axe de rotation, chaque grain de verrouillage étant monté coulissant radialement par rapport à l'axe de rotation, dans un canal de guidage (14) délimité entre deux guides (15) estampés dans le premier flasque, les grains de verrouillage étant commandés ensemble par ledit mécanisme de commande (24), chaque guide de chaque grain comportant des premier et deuxième bossages (16, 17 ; 16a, 17a) séparés par une zone intermédiaire (18 ; 18a), les zones intermédiaires respectives des guides étant sensiblement équidistantes par rapport à l'axe de rotation (Y), la face externe (8b) du premier flasque étant estampée en creux au niveau des premier et deuxième bossages (16, 17 ; 16a, 17a) de chaque grain mais non au niveau de la zone intermédiaire (18 ; 18a) .  5. Mechanism according to any one of the preceding claims, comprising a plurality of locking grains (13) angularly distributed about the axis of rotation, each locking pin being mounted sliding radially relative to the axis of rotation, in a channel. guide (14) delimited between two guides (15) stamped in the first flange, the locking grains being controlled together by said control mechanism (24), each guide of each grain having first and second bosses (16, 17; 16a, 17a) separated by an intermediate zone (18; 18a), the respective intermediate zones of the guides being substantially equidistant from the axis of rotation (Y), the outer face (8b) of the first flange being embossed at level of the first and second bosses (16, 17; 16a, 17a) of each grain but not at the intermediate zone (18; 18a).
6. Mécanisme selon l'une quelconque des revendications précédentes, dans lequel la face interne (8a) du premier flasque présente une forme plate s 'étendant généralement dans un plan, ledit canal de guidage (14) et ladite zone intermédiaire (18) s 'étendant dans ledit plan de la face interne. 6. Mechanism according to any one of the preceding claims, wherein the inner face (8a) of the first flange has a flat shape extending generally in a plane, said guide channel (14) and said intermediate zone (18) s extending in said plane of the inner face.
7. Mécanisme selon la revendication 6, dans lequel le premier flasque (8) comporte au moins un bossage de renfort (23) engagé avec jeu radial dans un évidement (22a) du grain de verrouillage. 7. Mechanism according to claim 6, wherein the first flange (8) comprises at least one reinforcing boss (23) engaged with radial clearance in a recess (22a) of the locking grain.
8. Mécanisme selon la revendication 7, dans lequel ledit bossage de renfort (23) est disposé en saillie dans le canal de guidage (14) et le grain de verrouillage (13) comporte un logement (22a) ouvert vers le premier flasque, dans lequel est reçu ledit bossage de renfort (23) avec un certain jeu radial permettant au grain de verrouillage de coulisser entre les positions de verrouillage et de déverrouillage .  8. Mechanism according to claim 7, wherein said reinforcement boss (23) is arranged projecting in the guide channel (14) and the locking pin (13) comprises a housing (22a) open towards the first flange, in which is received said reinforcing boss (23) with a certain radial clearance allowing the locking grain to slide between the locking and unlocking positions.
9. Mécanisme selon l'une quelconque des revendications 1 à 5, dans lequel la face interne (8a) du premier flasque présente une forme plate s 'étendant généralement dans un plan, ledit canal de guidage (14) s 'étendant dans ledit plan de la face interne, ladite zone intermédiaire (18a) comportant au moins une partie en relief (33) faisant saillie par rapport au plan de la face interne, ladite partie en relief (33) s 'étendant radialement entre lesdits premier et deuxième bossages (16a, 17a) et rejoignant lesdits premier et deuxième bossages .  9. Mechanism according to any one of claims 1 to 5, wherein the inner face (8a) of the first flange has a flat shape extending generally in a plane, said guide channel (14) extending in said plane. of the inner face, said intermediate zone (18a) comprising at least one raised portion (33) protruding from the plane of the inner face, said raised portion (33) extending radially between said first and second bosses ( 16a, 17a) and joining said first and second bosses.
10. Mécanisme selon la revendication 9, dans lequel ladite zone intermédiaire (18a) comporte deux parties en relief (33) faisant saillie par rapport au plan de la face interne et encadrant une cuvette centrale (32), lesdites parties en relief s 'étendant radialement entre lesdits premier et deuxième bossages (16a, 17a) et rejoignant lesdits premier et deuxième bossages.  10. Mechanism according to claim 9, wherein said intermediate zone (18a) comprises two raised parts (33) projecting from the plane of the inner face and surrounding a central bowl (32), said raised portions extending radially between said first and second bosses (16a, 17a) and joining said first and second bosses.
11. Siège de véhicule comportant une assise (3) et un dossier (2) reliés entre eux par au moins un mécanisme d'articulation selon l'une quelconque des revendications précédentes, le siège comportant un flasque de support (3a) soudé au premier flasque (8) du mécanisme d'articulation selon au moins une ligne (30) sensiblement circonférentielle qui s'étend continûment sur une certaine étendue angulaire entre au moins deux portions de la surface extérieure du premier flasque encadrant le guide (14) du grain de verrouillage, cette ligne de soudure (30) comprenant des parties en regard des zones intermédiaires (18 ; 18a) susmentionnées et du canal de guidage (14) . 11. Vehicle seat comprising a seat (3) and a backrest (2) interconnected by at least one articulation mechanism according to any one of the preceding claims, the seat comprising a support flange (3a) welded to the first flange (8) of the mechanism articulation member according to at least one substantially circumferential line (30) which extends continuously over a certain angular extent between at least two portions of the outer surface of the first flange framing the guide (14) of the locking grain, this weld line (30) comprising portions facing the aforementioned intermediate zones (18; 18a) and the guide channel (14).
12. Siège selon la revendication 11, dans lequel la ligne de soudure (30) s'étend sensiblement selon un cercle.  The seat of claim 11, wherein the weld line (30) extends substantially in a circle.
13. Siège selon la revendication 12, dans lequel la ligne de soudure (30) présente des portions de décrochement (31) décalées radialement par rapport audit cercle, en regard de bossages supplémentaires (23, 27) estampés en creux sur la face externe (8b) du premier flasque et faisant saillie sur la face interne (8a) dudit premier flasque.  13. Seat according to claim 12, wherein the weld line (30) has recess portions (31) offset radially relative to said circle, facing additional bosses (23, 27) embossed on the outer face ( 8b) of the first flange and projecting on the inner face (8a) of said first flange.
PCT/FR2014/050007 2013-02-22 2014-01-06 Hinge mechanism for a vehicle seat and seat comprising such a mechanism WO2014128373A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1351566A FR3002500B1 (en) 2013-02-22 2013-02-22 JOINT MECHANISM FOR A VEHICLE SEAT AND SEAT COMPRISING SUCH A MECHANISM
FR1351566 2013-02-22

Publications (2)

Publication Number Publication Date
WO2014128373A2 true WO2014128373A2 (en) 2014-08-28
WO2014128373A3 WO2014128373A3 (en) 2014-12-18

Family

ID=48140078

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2014/050007 WO2014128373A2 (en) 2013-02-22 2014-01-06 Hinge mechanism for a vehicle seat and seat comprising such a mechanism

Country Status (2)

Country Link
FR (1) FR3002500B1 (en)
WO (1) WO2014128373A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3023754A1 (en) * 2014-07-16 2016-01-22 Faurecia Sieges Automobile MEMORIZATION DEVICE, SLIDER COMPRISING SUCH A MEMORIZATION DEVICE AND VEHICLE SEAT COMPRISING SUCH A SLIDER
CN106388368A (en) * 2016-09-09 2017-02-15 湖北中航精机科技有限公司 Angle adjusting device, and chair provided with angle adjusting device
CN110356295A (en) * 2018-04-10 2019-10-22 佛吉亚(无锡)座椅部件有限公司 A kind of automobile-used noncontinuity backrest angle adjustor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2955062A1 (en) 2010-01-12 2011-07-15 Faurecia Sieges Automobile JOINT SYSTEM AND VEHICLE SEAT COMPRISING SUCH AN ARTICULATION SYSTEM.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2792583B1 (en) * 1999-04-20 2001-07-27 Faure Bertrand Equipements Sa ARTICULATION MECHANISM FOR VEHICLE SEAT
FR2806982B1 (en) * 2000-03-30 2002-06-14 Faurecia Sieges Automobile ARTICULATION MECHANISM FOR VEHICLE SEAT AND SEAT HAVING SUCH A MECHANISM

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2955062A1 (en) 2010-01-12 2011-07-15 Faurecia Sieges Automobile JOINT SYSTEM AND VEHICLE SEAT COMPRISING SUCH AN ARTICULATION SYSTEM.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3023754A1 (en) * 2014-07-16 2016-01-22 Faurecia Sieges Automobile MEMORIZATION DEVICE, SLIDER COMPRISING SUCH A MEMORIZATION DEVICE AND VEHICLE SEAT COMPRISING SUCH A SLIDER
CN106388368A (en) * 2016-09-09 2017-02-15 湖北中航精机科技有限公司 Angle adjusting device, and chair provided with angle adjusting device
CN106388368B (en) * 2016-09-09 2024-01-16 湖北中航精机科技有限公司 Angle adjusting device and seat with same
CN110356295A (en) * 2018-04-10 2019-10-22 佛吉亚(无锡)座椅部件有限公司 A kind of automobile-used noncontinuity backrest angle adjustor

Also Published As

Publication number Publication date
FR3002500B1 (en) 2015-04-03
FR3002500A1 (en) 2014-08-29
WO2014128373A3 (en) 2014-12-18

Similar Documents

Publication Publication Date Title
CA2509802C (en) Articulation mechanism for car seats and seat comprising such a mechanism
FR2761308A1 (en) MOTOR VEHICLE SEAT
FR2920713A1 (en) MECHANISM FOR ADJUSTING THE TILT OF A MOTOR VEHICLE SEAT
FR2873633A1 (en) JOINT MECHANISM FOR A VEHICLE SEAT AND SEAT COMPRISING SUCH A MECHANISM
FR2998837A1 (en) JOINT ASSEMBLY FOR VEHICLE SEAT
FR3018051A1 (en) ARTICULATION MECHANISM AND VEHICLE SEAT COMPRISING SUCH A MECHANISM
FR2975052A1 (en) JOINT ASSEMBLY FOR VEHICLE SEAT AND VEHICLE SEAT COMPRISING THE JOINT ASSEMBLY
FR2815587A1 (en) Joint for connecting back and seat sections of car seat comprises fixed outer ring and rotating inner ring with inwardly-facing teeth which engage with teeth on pads which slide to lock rotating ring and are controlled by cam
FR2900605A1 (en) Seat e.g. front seat, backrest/base connecting mechanism manufacturing method for motor vehicle, involves applying locking pressure on semi-rings and radially directing pressure to apply radial pressure of semi-rings on movable end plate
FR2884463A1 (en) ADJUSTING MECHANISM AND VEHICLE SEAT COMPRISING SUCH A MECHANISM
FR2917678A1 (en) JOINT LINING FOR MOTOR VEHICLE SEATS AND COMPRISING A ROUND
FR2833898A1 (en) Vehicle seat articulation mechanism comprises two rigid frames pivoted to each other and can be immobilized by two toothed inserts, control insert held in retracted position by circular ramp pivoting with seat back
WO2014128373A2 (en) Hinge mechanism for a vehicle seat and seat comprising such a mechanism
EP3253615B1 (en) Releasable hinge assembly for a motor vehicle seat
FR2890612A1 (en) Car seat has armrest mounted on transverse shaft whose ends fit into mountings with central, vertical slot which has rows of teeth on either side, rotating shaft allowing hook on it to engage with teeth at desired height
EP3944985A1 (en) Vehicle seat
EP3003776B1 (en) Releasable hinge assembly for a motor vehicle seat
FR2884191A1 (en) Motor vehicle`s seat articulation mechanism, has rising step in shape of wedge pushing back locking step in locking position when rising step is in active position and unlocking position when rising step is in pitch position
EP3055162A1 (en) Releasable hinge assembly for a motor vehicle seat
FR2892356A1 (en) Articulation mechanism for seat of vehicle, has ring with circular inner surface, rigid flange with central part and retention unit, where flange and ring are maintained together by gussets fixed on element chosen among flange and ring
FR2869847A1 (en) Link mechanism for motor vehicle seat e.g. front seat, has one type of teeth with its teeth normally in contact with teeth of another type of teeth, and reinforcement unit made of very high resistance material than material of latter teeth
FR2884192A1 (en) Seat e.g. front seat, articulation mechanism for motor vehicle, has control mask having cam edge supported against stopper integrated to frames for adjusting clearance of inserts and actuating cam with respect to one of frames
FR2888173A1 (en) Vehicle seat pivoting device, has stopping unit integrated to frame and independent from bolt that comprises tooth penetrating into notch of another frame, and cam pushing tooth end in contact with notch bottom in locked position
FR2845045A1 (en) Articulation for motor vehicle seat has rigid frames with locking slides controlled by ramp with defined angles
FR2890913A1 (en) Articulation mechanism between vehicle seat back and base has first and second flanges and joining plates each made from two separate components

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14701809

Country of ref document: EP

Kind code of ref document: A2

122 Ep: pct application non-entry in european phase

Ref document number: 14701809

Country of ref document: EP

Kind code of ref document: A2