WO2005087051A2 - Seat with a separately adjustable back rest and seat portion and an adjustable seat depth - Google Patents

Seat with a separately adjustable back rest and seat portion and an adjustable seat depth Download PDF

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Publication number
WO2005087051A2
WO2005087051A2 PCT/FR2005/000547 FR2005000547W WO2005087051A2 WO 2005087051 A2 WO2005087051 A2 WO 2005087051A2 FR 2005000547 W FR2005000547 W FR 2005000547W WO 2005087051 A2 WO2005087051 A2 WO 2005087051A2
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WO
WIPO (PCT)
Prior art keywords
seat
backrest
expandable
retractable
support
Prior art date
Application number
PCT/FR2005/000547
Other languages
French (fr)
Other versions
WO2005087051A3 (en
Inventor
Roger Prieur
Original Assignee
Roger Prieur
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 Roger Prieur filed Critical Roger Prieur
Priority to EP05735539A priority Critical patent/EP1722657B1/en
Priority to US10/591,942 priority patent/US20070194612A1/en
Priority to AT05735539T priority patent/ATE508662T1/en
Publication of WO2005087051A2 publication Critical patent/WO2005087051A2/en
Publication of WO2005087051A3 publication Critical patent/WO2005087051A3/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/0244—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by fluid means

Definitions

  • the subject of the present invention is a seat of the type comprising a seat and a backrest, articulated with respect to each other about an axis of rotation. More specifically, the subject of the present invention is a seat of the aforementioned type, in which said articulation is produced in the form of a pair of means located on either side of the seat relative to the plane of symmetry passing through the backrest and the seat, each of said means consisting, on the one hand, of a first element, forming a support in rotation of the backrest, crossed by said axis of rotation, and one end of which is secured to said
  • a seat corresponding to such a definition is known from American patent application US2003 / 0011226 A1. It is a car seat comprising an inverted U-shaped part as a backrest frame. 14 and a frame as seat frame 10, said frame being slidably mounted on a support 86.
  • Each free end of the U-shaped piece constitutes what has been called, above, a first element, and the second element of the articulation is a part secured to the frame 10, so that the second element is the seat frame itself.
  • the ends of the U-shaped part are threaded into a slot in the seat frame 10 so that, when the seat frame slides, the back frame can only follow.
  • the depth of the seat is adapted to its size. It is in fact just as unpleasant for a tall person to have thighs protruding far from the front of the seat as for a short person size of not having feet. touching the floor when seated at the back of the seat.
  • the invention proposes to provide a new solution to this problem by combining the back / seat articulation with the adjustment of the seat depth.
  • according to the invention relates to a seat of the aforementioned type, characterized in that said second element is a part which is
  • the first expandable / retractable member is a gas spring, that is to say a hydro-pneumatic construction element with cylinder and piston, which makes it possible to pivot the backrest and counterbalance the movement at a controlled speed, under the effect of the only support exerted by the user's bust on the backrest.
  • the force of this support being a function of the weight of the user, it is useful to be able to adjust the gas spring accordingly.
  • its anchor point on said support in rotation of the backrest is adjustable along said support.
  • the support for sliding the seat advantageously comprises a stop limiting the pivoting of the backrest with respect to the seat.
  • the sliding support of the seat slides with respect to a part secured to the seat and can be immobilized with respect to this same part.
  • the rotating support of the backrest and the sliding support of the seat being secured via the axis of rotation, it follows that the rotating support of the backrest also slides with respect to the piece secured to the seat and that, as a result, the backrest can more or less be brought closer to the free edge of the seat (in other words, the depth of the seat can be more or less great).
  • the backrest In reclining seats, such as the seats of motor vehicles and airplanes, the backrest can be more or less inclined with respect to the general plane of the seat which itself remains fixed.
  • the seat according to the invention further comprises a seat support which rests directly or indirectly on the ground and this seat support provides an anchor point for one of the ends of a second expandable / retractable member, the other end of which is anchored to the seat.
  • This second retractable expandable member can be a pneumatic cylinder or an electric cylinder.
  • the seat is a relaxation chair and, for this purpose, it further comprises a leg rest.
  • said legrest provides an anchor point for one of the ends of a third expandable / retractable member, the other end of which is anchored on the seat.
  • This third retractable expandable member can be a pneumatic cylinder or an electric cylinder.
  • the inclination of the seat 1 relative to the ground is obtained by means of a pneumatic cylinder 4 which bears, on the one hand, on said seat 1 and, on the other hand, on a support of seat 5 resting on the ground;
  • the inclination of the backrest 2 relative to the seat 1 is obtained by means of a gas spring 6 which bears, on the one hand, on said seat 1 and, on the other hand, on a part 10 depending on the file 2;
  • the inclination of the leg rest 3 with respect to the seat 1 is obtained by means of a pneumatic cylinder 7 which bears, on the one hand, on said seat 1 and, on the other hand, on said rest legs.
  • the gas spring 6 is actuated, in one direction, by simply pressing the bust of the user against the backrest 2 and, in the other direction, by simply detaching the back from the backrest and, if necessary if necessary, user support on the armrests (not shown). It is understood that the backrest 2 returns automatically since, when it is tilted by pressing the bust, the gas from the gas spring is compressed and, as soon as the support is released, the gas expands.
  • the pneumatic cylinders 4 and 7 are controlled, in a completely conventional manner, by a push button.
  • the pneumatic cylinders 4 and 7 could be replaced by electric cylinders while retaining the gas spring 6 for maneuvering the backrest 2, or else the gas spring 6 could also be replaced by an electric cylinder.
  • the seat 1 pivots around the point P.
  • the seat support 5 is provided with feet which can be adjustable in height.
  • the legrest 3 incorporated in the armchair according to the invention may have the structure described in EP 1 099 396, that is to say a deployable and retractable structure, and which is provided with rollers in constant contact with the ground, casters thanks to which the deployment only needs to be started, most of the deployment movement being effected by the. simple gravity. If we come to Figure 3, it details the articulation zone between the seat 1 and the backrest 2, on one of the side faces of the seat, a symmetrical assembly being located on the other face lateral.
  • Reference 8 designates a part secured to the backrest and reference 9 designates a part secured to the seat.
  • the articulation comprises a first element 10, called “support in rotation of the backrest” and a second element 11, said “support in sliding of the seat", the elements 10 and 11 being joined by an axis of rotation 12.
  • the element 10 is roughly shaped like a policeman's cap, vertically, with the axis of rotation 12 passing through it approximately in the middle.
  • the element 10 is fixedly mounted on the part 8 secured to the backrest and, at its opposite end, the element 10 offers an anchor point 13 for the rod 14 of the piston of the gas spring. 6, the cylinder 15 of which is anchored at 16 to the second element 11.
  • An adjustment screw 17 makes it possible to move the anchor point 13 and therefore to increase or reduce the stroke of the gas spring piston 6.
  • a stop 18 limits the pivoting of the element 10 and therefore of the backrest 2.
  • the element 11 has adjustment holes such as 19 coming opposite slots, such as 20 housed in the part 9, so that the relative position of the element 11 and the part 9 can be changed in translation by sliding and fixed in the chosen position by screwing bolts, such as 21, passing through both a hole 19 and a slot 20.
  • This assembly therefore makes it possible both to adjust the command of the inclination of the backrest as a function of the weight of the user (by playing on the level of the anchor point 13) and that of the depth of the seat. (by playing on the relative position of element 11 and part 9).
  • the result of the seat depth adjustment is illustrated schematically in Figures Id-lf.
  • Figure Id is identical to Figure la and shows a maximum seat depth PI, the base of the backrest 2 coinciding with the rear edge of the seat 1.
  • the figure shows a lower seat depth P2 ⁇ P1 by relative displacement between the backrest 2 and the seat 1, with conservation of the angles ⁇ l and ⁇ l, and Figure If shows an even shallower seat depth P3 ⁇ P2 ⁇ P1 by relative displacement between the backrest 2 and the seat 1 , and always with conservation of the angles ⁇ l and ⁇ l.
  • the three positions illustrated are only three examples, any intermediate position being possible and that the modification of the seat depth is possible whatever ⁇ and ⁇ . It is understood that these adjustments, which involve the use of tools, will generally be made at installation, depending on the person for whom the wheelchair is intended.
  • the same fireplace can be equipped with two exactly identical armchairs, but one adjusted for a light and small person and the other for a large and heavy person.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

A seat including a seat portion and a back rest both pivotable about a hinge pin (12). The hinge includes, on either side of the seat, a rotary back rest holder (10) having the hinge pin (12) extending therethrough, wherein said back rest holder is rigidly connected to the back rest and defines an attachment point (13) for a gas spring (6), as well as a slidable seat portion holder (11) having the hinge pin (12) extending therethrough, wherein said seat portion holder defines a further attachment point for the gas spring (6), and said seat portion holder (11) is slidably mounted relative to a member (9) rigidly connected to the seat portion and selectively lockable in a predetermined position relative thereto, whereby the seat depth is adjustable.

Description

. Siège à dossier et assise indépendamment inclinables et à profondeur d'assise . réglable. La présente invention a pour objet un siège du type comprenant une assise et un dossier, articulés l'un par rapport à l'autre autour d'un axe de rotation. Plus précisément, la présente invention a pour objet un siège du type précité, dans lequel ladite articulation est réalisée sous la forme d'une paire de moyens situés de part et d'autre du siège par rapport au plan de symétrie passant par le dossier et l'assise, chacun desdits moyens étant constitué, d'une part, d'un premier élément, formant support en rotation du dossier, traversé par ledit axe de rotation, et dont une extrémité est solidarisée audit . Seat with backrest and seat independently reclining and seat depth. adjustable. The subject of the present invention is a seat of the type comprising a seat and a backrest, articulated with respect to each other about an axis of rotation. More specifically, the subject of the present invention is a seat of the aforementioned type, in which said articulation is produced in the form of a pair of means located on either side of the seat relative to the plane of symmetry passing through the backrest and the seat, each of said means consisting, on the one hand, of a first element, forming a support in rotation of the backrest, crossed by said axis of rotation, and one end of which is secured to said
•dossier et, d'autre part, d'un second élément. On connaît un siège répondant à une telle définition d'après la demande de brevet américaine US2003/0011226 Al. Il s'agit d'un siège de voiture comportant une pièce en U inversé comme armature de dossier. 14 et un cadre comme armature d'assise 10, ledit cadre étant monté coulissant sur un support 86. Chaque extrémité libre de la pièce en U constitue ce que l'on a appelé, plus haut, un premier élément, et le second élément de l'articulation est une pièce solidarisée au cadre 10, de sorte que le deuxième élément est le cadre d'assise luimême. Les extrémités de la pièce en U sont enfilées dans une fente ménagée dans le cadre d'assise 10 de sorte que, lorsque l'armature d'assise coulisse, l'armature de dossier ne peut que suivre. Aucun moyen- n'est prévu pour régler la profondeur d'assise et un tel réglage est tout à fait impossible compte tenu de l'enfilage de l'armature de dossier dans l'armature d'assise. Or, un élément important du confort de l'utilisateur est que la profondeur de l'assise soit adaptée à sa taille. Il est en effet tout aussi désagréable pour une personne de grande taille d'avoir les cuisses qui dépassent largement de l'avant de l'assise que pour une personne de petite taille de ne pas avoir les pieds . qui touchent par terre lorsqu'elle est assise au fond du siège. L'invention se propose d'apporter une nouvelle solution à ce problème en combinant l'articulation dossier/siège au réglage de la profondeur de l'assise. A cette fin, selon l'invention a pour objet un siège du type précité, caractérisé en ce que ledit second élément est une pièce qui est • dossier and, on the other hand, a second element. A seat corresponding to such a definition is known from American patent application US2003 / 0011226 A1. It is a car seat comprising an inverted U-shaped part as a backrest frame. 14 and a frame as seat frame 10, said frame being slidably mounted on a support 86. Each free end of the U-shaped piece constitutes what has been called, above, a first element, and the second element of the articulation is a part secured to the frame 10, so that the second element is the seat frame itself. The ends of the U-shaped part are threaded into a slot in the seat frame 10 so that, when the seat frame slides, the back frame can only follow. No means are provided for adjusting the seat depth and such adjustment is quite impossible given the threading of the backrest frame in the seat frame. However, an important element of user comfort is that the depth of the seat is adapted to its size. It is in fact just as unpleasant for a tall person to have thighs protruding far from the front of the seat as for a short person size of not having feet. touching the floor when seated at the back of the seat. The invention proposes to provide a new solution to this problem by combining the back / seat articulation with the adjustment of the seat depth. To this end, according to the invention relates to a seat of the aforementioned type, characterized in that said second element is a part which is
• distincte de l'assise, • solidarisée audit premier élément par le biais dudit axe de rotation traversant ledit second élément au voisinage de l'une de ses extrémités et ledit premier élément,• distinct from the seat, • secured to said first element by means of said axis of rotation passing through said second element in the vicinity of one of its ends and said first element,
• montée coulissante sur une pièce solidarisée à l'assise et • immobilisable en une position choisie par rapport à cette même pièce, un premier organe dilatable/rétractable étant ancré, d'une part, sur l'extrémité dudit premier élément opposée à celle qui est solidarisée au dossier et, d'autre part, sur l'extrémité dudit second élément opposée à l'axe de rotation. Grâce à cette disposition, comme cela sera développé plus loin, le support en rotation du dossier est mobile en translation par rapport à l'assise. Dans une forme d'exécution préférée, le premier organe dilatable/rétractable est un ressort à gaz, c'est-à-dire un élément de construction hydro-pneumatique à cylindre et piston, qui permet de faire pivoter le dossier et de contrebalancer le mouvement à une vitesse contrôlée, sous l'effet du seul appui exercé par le buste de l'utilisateur sur le dossier. La force de cet appui étant fonction du poids de l'utilisateur, il est utile de pouvoir régler en conséquence le ressort à gaz. A cette fin, son point d'ancrage sur ledit support en rotation du dossier est réglable au long dudit support. Ainsi, on peut choisir la longueur de la course du piston du ressort à gaz et, donc, sa résistance. Le support en coulissement de l'assise comporte avantageusement une butée limitant le pivotement du dossier par rapport à l'assise. Comme indiqué plus haut, le support en coulissement de l'assise coulisse par rapport à une pièce solidarisée à l'assise et est immobilisable par rapport à cette même pièce. Le support en rotation du dossier et le support en coulissement de l'assise étant solidarisés via l'axe de rotation, il s'ensuit que le support en rotation du dossier coulisse également par rapport à la pièce solidarisée de l'assise et que, par suite, le dossier peut plus ou moins être rapproché du bord libre de l'assise (autrement dit, la profondeur de l'assise peut être plus ou moins grande). Dans les sièges inclinables, tels que les sièges de véhicules automobiles et d'avions, le dossier peut être plus ou moins incliné par rapport au plan général de l'assise qui, lui, reste fixe. On connaît également des sièges dans lesquels l'inclinaison du dossier vers l'arrière entraîne le basculement de l'assise vers le haut, et vice versa. Pour un meilleur confort, il serait cependant souhaitable que, dans le même siège, non seulement l'angle entre le dossier et l'assise puisse être modifié à la demande, mais encore que l'angle entre le plan général de l'assise et le sol puisse l'être également, et que ces deux modifications soient indépendantes l'une de l'autre. A cette fin, le siège selon l'invention comporte, en outre, un support d'assise qui repose directement ou indirectement, sur le sol et ce support d'assise offre un point d'ancrage pour l'une des extrémités d'un deuxième organe dilatable/rétractable, dont l'autre extrémité est ancrée sur l'assise. Ce deuxième organe dilatable rétractable peut être un vérin pneumatique ou un vérin électrique. Ainsi, il est possible d'incliner le dossier et l'assise indépendamment l'un de l'autre. Dans une forme d'exécution préférée de l'invention, le siège est un fauteuil de relaxation et, à cette fin, il comporte, en outre, un repose-jambes. Comme il importe, là encore, que le repose-jambes puisse être manoeuvré indépendamment de l'inclinaison du dossier et de l'inclinaison de l'assise, ledit repose-jambes offre un point d'ancrage pour l'une des extrémités d'un troisième organe dilatable/rétractable, dont l'autre extrémité est ancrée sur l'assise.. Ce troisième organe dilatable rétractable peut être un vérin pneumatique ou un vérin électrique. Ainsi, les premier, deuxième et troisième organes - dilatables/rétractables fonctionnent indépendamment les uns des autres. L'invention sera mieux comprise à la lecture de la description suivante faite en référence aux dessins annexés dans lesquels : - les figures la-lc représentent schématiquement les plans respectifs des trois composants principaux (assise, dossier et repose-jambes) d'un fauteuil de relaxation selon l'invention et les figures Id-lf représentent schématiquement trois profondeurs d'assise possibles grâce à l'invention ; - la figure 2 est un schéma montant l'implantation des trois organes de commande dilatables/rétractables ; - la figure 3 est une vue de détail de la zone de l'articulation entre le dossier et l'assise et - la figure 4 est une vue de détail de l'articulation de la figure 3, observée depuis l'arrière du siège (flèche F de la figure 3) . Si l'on se réfère aux figures la-lc, on voit la position qu'occupent les plans respectifs de l'assise 1, du dossier 2 et du repose-jambes 3, en position "assise" (figure la),' en position de relaxation (figure lb) et en position "gravité zéro" (cœur plus bas que le repose-jambes) (figure le) . L'assise 1 fait, avec le dossier 2, un angle α qui est variable (αl < α2 < α3) et, avec le repose-jambes 3 un angle β qui est également variable (βl < β2 < β3), et la variation de α est indépendante de celle de β. Les trois plans (plan de l'assise 1, plan du dossier 2 et plan du repose-jambes 3) sont mobiles indépendamment les uns des autres. A cette fin, comme il ressort de la figure 2, trois organes de manœuvre sont prévus. Plus précisément, l'inclinaison de l'assise 1 par rapport au sol est obtenue au moyen d'un vérin pneumatique 4 qui prend appui, d'une part, sur ladite assise 1 et, d'autre part, sur un support d'assise 5 reposant sur le sol ; l'inclinaison du dossier 2 par rapport à l'assise 1 est obtenue au moyen d'un ressort à gaz 6 qui prend appui, d'une part, sur ladite assise 1 et, d'autre part, sur une pièce 10 dépendant du dossier 2 ; et l'inclinaison du repose-jambes 3 par rapport à l'assise 1 est obtenue au moyen d'un vérin pneumatique 7 qui prend appui, d'une part, sur ladite assise 1 et, d'autre part, sur ledit repose-jambes . Le ressort à gaz 6 est actionné, dans un sens, par le simple appui du buste de 1 '.utilisateur contre le dossier 2 et, dans l'autre sens, par le simple décollement du dos d'avec le dossier et, le cas échéant, appui de l'utilisateur sur les accoudoirs (non représentés) . On comprend que le dossier 2 revient automatiquement puisque, quand on l'incline par appui du buste, le gaz du ressort à gaz se trouve comprimé et, dès que l'appui est relâché, le gaz se détend. Les vérins pneumatiques 4 et 7 sont commandés, de façon tout à fait classique, par un bouton poussoir. Les vérins pneumatiques 4 et 7 pourraient être remplacés par des vérins électriques en conservant le ressort à gaz 6 pour la manœuvre du dossier 2, ou bien le ressort à gaz 6 pourrait, lui aussi, être remplacé par un vérin électrique. On comprend que l'assise 1 pivote autour du point P. Le support d'assise 5 est muni de pieds qui peuvent être réglables en hauteur. Le repose-jambes 3 incorporé dans le fauteuil selon l'invention peut avoir la structure décrite dans EP 1 099 396, c'est-à-dire une structure déployable et escamotable, et qui est pourvue de roulettes en constant contact avec le sol, roulettes grâce auxquelles le déploiement n'a besoin que d'être amorcé, l'essentiel du mouvement de déploiement se faisant sous l'effet de la. simple gravité. Si l'on en vient à la figure 3, celle-ci détaille la zone d'articulation entre l'assise 1 et le dossier 2, sur l'une des faces latérales du siège, un ensemble symétrique étant situé sur l'autre face latérale. La référence 8 désigne une pièce solidaire du dossier et la référence 9 désigne une pièce solidaire de l'assise. L'articulation comprend un premier élément 10, dit "support en rotation du dossier" et un second élément 11, dit "support en coulissement de l'assise", les éléments 10 et 11 étant réunis par un axe de rotation 12. Comme on le volt, l'élément 10 a grossièrement une forme en chapeau de gendarme, à la verticale, avec l'axe de rotation 12 le traversant approximativement en son milieu. A l'une de ses extrémités, l'élément 10 est monté fixe sur la pièce 8 solidaire du dossier et, à son extrémité opposée, l'élément 10 offre un point d'ancrage 13 pour la tige 14 du piston du ressort à gaz 6 dont le cylindre 15 est ancré en 16 sur le second élément 11. Une vis de réglage 17 permet de déplacer le point d'ancrage 13 et donc d'accroître ou de réduire la course du piston du ressort à gaz 6. Une butée 18 limite le pivotement de l'élément 10 et donc du dossier 2. Comme on le comprend mieux d'après la figure 4, l'élément 11 comporte des trous de réglage tels que 19 venant en vis-à-vis de fentes, telles que 20 ménagées dans la pièce 9, de sorte que la position relative de l'élément 11 et de la pièce 9 peut être modifiée en translation par coulissement et fixée en position choisie par vissage de boulons, tels que 21, traversant à la fois un trou 19 et une fente 20. Cet ensemble permet donc à la fois de régler la commande de l'inclinaison du dossier en fonction du poids de l'utilisateur (en jouant sur le niveau du point d'ancrage 13) et celle de la profondeur de l'assise (en jouant sur la position relative de l'élément 11 et de la pièce 9) . Le résultat du réglage de la profondeur de l'assise est illustré schématiquement par les figures Id-lf. La figure Id est identique à la figure la et montre une profondeur d'assise maximale PI, la base du dossier 2 coïncidant avec le bord arrière de l'assise 1. La figure le montre une plus faible profondeur d'assise P2<P1 par déplacement relatif entre le dossier 2 et l'assise 1, avec conservation des angles αl et βl, et la figure If montre une profondeur d'assise encore plus faible P3<P2<P1 par déplacement relatif entre le dossier 2 et l'assise 1, et toujours avec conservation des angles αl et βl. On comprendra que les trois positions illustrées ne sont que trois exemples, toute position intermédiaire étant possible et que la modification de la profondeur d'assise est possible quels que soient α et β. Il est bien entendu que ces réglages, qui impliquent le recours à des outils, seront généralement faits à l'installation, en fonction de la personne à laquelle le fauteuil est destiné. Ainsi, un même foyer pourra être équipé de deux fauteuils exactement identiques, mais l'un réglé pour une personne légère et de petite taille et l'autre pour une personne grande et lourde. • slidingly mounted on a part secured to the seat and • immobilizable in a chosen position relative to this same part, a first expandable / retractable member being anchored, on the one hand, on the end of said first element opposite to that which is secured to the file and, on the other hand, on the end of said second element opposite the axis of rotation. Thanks to this arrangement, as will be developed later, the back support for rotation is movable in translation relative to the seat. In a preferred embodiment, the first expandable / retractable member is a gas spring, that is to say a hydro-pneumatic construction element with cylinder and piston, which makes it possible to pivot the backrest and counterbalance the movement at a controlled speed, under the effect of the only support exerted by the user's bust on the backrest. The force of this support being a function of the weight of the user, it is useful to be able to adjust the gas spring accordingly. To this end, its anchor point on said support in rotation of the backrest is adjustable along said support. Thus, one can choose the length of the stroke of the piston of the gas spring and, therefore, its resistance. The support for sliding the seat advantageously comprises a stop limiting the pivoting of the backrest with respect to the seat. As indicated above, the sliding support of the seat slides with respect to a part secured to the seat and can be immobilized with respect to this same part. The rotating support of the backrest and the sliding support of the seat being secured via the axis of rotation, it follows that the rotating support of the backrest also slides with respect to the piece secured to the seat and that, as a result, the backrest can more or less be brought closer to the free edge of the seat (in other words, the depth of the seat can be more or less great). In reclining seats, such as the seats of motor vehicles and airplanes, the backrest can be more or less inclined with respect to the general plane of the seat which itself remains fixed. There are also known seats in which the inclination of the backrest to the rear causes the seat to tilt upwards, and vice versa. For better comfort, it would however be desirable that, in the same seat, not only the angle between the backrest and the seat can be changed on request, but also that the angle between the general plane of the seat and the soil can also be, and that these two modifications are independent of each other. To this end, the seat according to the invention further comprises a seat support which rests directly or indirectly on the ground and this seat support provides an anchor point for one of the ends of a second expandable / retractable member, the other end of which is anchored to the seat. This second retractable expandable member can be a pneumatic cylinder or an electric cylinder. Thus, it is possible to recline the backrest and the seat independently of each other. In a preferred embodiment of the invention, the seat is a relaxation chair and, for this purpose, it further comprises a leg rest. As it is important, here again, that the legrest can be maneuvered independently of the inclination of the backrest and the inclination of the seat, said legrest provides an anchor point for one of the ends of a third expandable / retractable member, the other end of which is anchored on the seat. . This third retractable expandable member can be a pneumatic cylinder or an electric cylinder. Thus, the first, second and third organs - expandable / retractable operate independently of each other. The invention will be better understood on reading the following description made with reference to the accompanying drawings in which: - Figures la-lc schematically represent the respective plans of the three main components (seat, backrest and legrest) of an armchair of relaxation according to the invention and Figures Id-lf schematically represent three possible seat depths thanks to the invention; - Figure 2 is a diagram showing the layout of the three expandable / retractable control members; - Figure 3 is a detail view of the area of the articulation between the backrest and the seat and - Figure 4 is a detailed view of the articulation of Figure 3, observed from the rear of the seat ( arrow F in Figure 3). If we refer to Figures la-lc, we see the position occupied by the respective planes of the seat 1, the backrest 2 and the leg rest 3, in the "seated" position (Figure la), 'in relaxation position (Figure lb) and "zero gravity" position (heart lower than the legrest) (figure le). The seat 1 makes, with the backrest 2, an angle α which is variable (αl <α2 <α3) and, with the legrest 3 an angle β which is also variable (βl <β2 <β3), and the variation of α is independent of that of β. The three planes (plane of the seat 1, plane of the backrest 2 and plane of the legrest 3) are movable independently of each other. To this end, as shown in Figure 2, three operating devices are provided. More specifically, the inclination of the seat 1 relative to the ground is obtained by means of a pneumatic cylinder 4 which bears, on the one hand, on said seat 1 and, on the other hand, on a support of seat 5 resting on the ground; the inclination of the backrest 2 relative to the seat 1 is obtained by means of a gas spring 6 which bears, on the one hand, on said seat 1 and, on the other hand, on a part 10 depending on the file 2; and the inclination of the leg rest 3 with respect to the seat 1 is obtained by means of a pneumatic cylinder 7 which bears, on the one hand, on said seat 1 and, on the other hand, on said rest legs. The gas spring 6 is actuated, in one direction, by simply pressing the bust of the user against the backrest 2 and, in the other direction, by simply detaching the back from the backrest and, if necessary if necessary, user support on the armrests (not shown). It is understood that the backrest 2 returns automatically since, when it is tilted by pressing the bust, the gas from the gas spring is compressed and, as soon as the support is released, the gas expands. The pneumatic cylinders 4 and 7 are controlled, in a completely conventional manner, by a push button. The pneumatic cylinders 4 and 7 could be replaced by electric cylinders while retaining the gas spring 6 for maneuvering the backrest 2, or else the gas spring 6 could also be replaced by an electric cylinder. It is understood that the seat 1 pivots around the point P. The seat support 5 is provided with feet which can be adjustable in height. The legrest 3 incorporated in the armchair according to the invention may have the structure described in EP 1 099 396, that is to say a deployable and retractable structure, and which is provided with rollers in constant contact with the ground, casters thanks to which the deployment only needs to be started, most of the deployment movement being effected by the. simple gravity. If we come to Figure 3, it details the articulation zone between the seat 1 and the backrest 2, on one of the side faces of the seat, a symmetrical assembly being located on the other face lateral. Reference 8 designates a part secured to the backrest and reference 9 designates a part secured to the seat. The articulation comprises a first element 10, called "support in rotation of the backrest" and a second element 11, said "support in sliding of the seat", the elements 10 and 11 being joined by an axis of rotation 12. As is the volt, the element 10 is roughly shaped like a policeman's cap, vertically, with the axis of rotation 12 passing through it approximately in the middle. At one of its ends, the element 10 is fixedly mounted on the part 8 secured to the backrest and, at its opposite end, the element 10 offers an anchor point 13 for the rod 14 of the piston of the gas spring. 6, the cylinder 15 of which is anchored at 16 to the second element 11. An adjustment screw 17 makes it possible to move the anchor point 13 and therefore to increase or reduce the stroke of the gas spring piston 6. A stop 18 limits the pivoting of the element 10 and therefore of the backrest 2. As can be better understood from FIG. 4, the element 11 has adjustment holes such as 19 coming opposite slots, such as 20 housed in the part 9, so that the relative position of the element 11 and the part 9 can be changed in translation by sliding and fixed in the chosen position by screwing bolts, such as 21, passing through both a hole 19 and a slot 20. This assembly therefore makes it possible both to adjust the command of the inclination of the backrest as a function of the weight of the user (by playing on the level of the anchor point 13) and that of the depth of the seat. (by playing on the relative position of element 11 and part 9). The result of the seat depth adjustment is illustrated schematically in Figures Id-lf. Figure Id is identical to Figure la and shows a maximum seat depth PI, the base of the backrest 2 coinciding with the rear edge of the seat 1. The figure shows a lower seat depth P2 <P1 by relative displacement between the backrest 2 and the seat 1, with conservation of the angles αl and βl, and Figure If shows an even shallower seat depth P3 <P2 <P1 by relative displacement between the backrest 2 and the seat 1 , and always with conservation of the angles αl and βl. It will be understood that the three positions illustrated are only three examples, any intermediate position being possible and that the modification of the seat depth is possible whatever α and β. It is understood that these adjustments, which involve the use of tools, will generally be made at installation, depending on the person for whom the wheelchair is intended. Thus, the same fireplace can be equipped with two exactly identical armchairs, but one adjusted for a light and small person and the other for a large and heavy person.

Claims

REVENDICATIONS 1. Siège du type comprenant une assise (1) et un dossier (2), articulés l'un par rapport à l'autre autour d'un axe de rotation (12), ladite articulation étant réalisée sous la forme d'une paire de moyens situés de part et d'autre du siège par rapport au plan de symétrie passant par le dossier (2) et l'assise (1), chacun desdits moyens étant constitué, d'une part, d'un premier élément (10), formant support en rotation du dossier (2), traversé par ledit axe de rotation (12), et dont une extrémité est solidarisée audit ' dossier (2)) et, d'autre part, d'un second élément (11), caractérisé en ce que ledit second élément (11) est une pièce qui est CLAIMS 1. Seat of the type comprising a seat (1) and a backrest (2), articulated with respect to each other about an axis of rotation (12), said articulation being produced in the form of a pair of means located on either side of the seat relative to the plane of symmetry passing through the backrest (2) and the seat (1), each of said means being constituted, on the one hand, by a first element ( 10), forming a rotating support for the backrest (2), crossed by said axis of rotation (12), and one end of which is secured to said 'backrest (2)) and, on the other hand, a second element (11 ), characterized in that said second element (11) is a part which is
• distincte de l'assise (1), • solidarisée audit premier élément (10) par le biais dudit axe de rotation (12) traversant ledit second élément au voisinage de l'une de ses extrémités et ledit premier élément,• distinct from the seat (1), • secured to said first element (10) by means of said axis of rotation (12) passing through said second element in the vicinity of one of its ends and said first element,
• montée coulissante sur une pièce (9) solidarisée à l'assise (1) et• sliding mounted on a part (9) secured to the seat (1) and
• immobilisable en une position choisie par rapport à cette même pièce (9) , un premier organe dilatable/rétractable (6) étant ancré, d'une part, sur l'extrémité dudit premier élément opposée à celle qui est solidarisée au dossier et, d'autre part, sur l'extrémité dudit second élément opposée à l'axe de rotation. 2. Siège selon la revendication 1, caractérisé en ce que ledit premier organe dilatable/rétractable est un ressort à gaz (β) . 3. Siège selon la revendication 1 ou 2, caractérisé en ce que le point d'ancrage (13) dudit premier organe dilatable/rétractable (6) sur ledit support en rotation (10) du dossier (2) est réglable au long dudit support. 4. Siège selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ledit support en coulissement de l'assise (1) comporte une butée (18) limitant le pivotement du dossier (2) par rapport à l'assise (1). 5. Siège selon l'une quelconque des revendications 1 à 4, comportant en outre un support d'assise (5), caractérisé en ce ledit support d'assise (5) offre un point d'ancrage pour l'une des extrémités d'un deuxième organe dilatable/rétractable (4), dont l'autre extrémité est ancrée sur ladite assise (1) . 6. Siège selon la revendication 5, caractérisé en ce que les premier (6) et deuxième (4) organes dilatables/rétractables fonctionnent indépendamment l'un de l'autre. 7. Siège selon l'une quelconque des revendications 1 à 5, comportant, en outre, un repose-jambes (3), caractérisé en ce que ledit repose-jambes (3) offre un point' d'ancrage pour l'une des extrémités d'un troisième organe dilatable/rétractable (7), dont l'autre extrémité est ancrée sur ladite assise (1) . 8. Siège selon la revendication 7, caractérisé en ce que les premier (β), deuxième (4) et troisième (7) organes dilatables/rétractables fonctionnent indépendamment les uns des autres. 9. Siège selon l'une quelconque des revendications 5 à 7, caractérisé en ce que lesdits deuxième (4) et/ou troisième (7) organe (s) dilatable (s) /rétractable (s) est (sont) un(des) vérin(s) pneumatique (s) . 10. Siège selon l'une quelconque des revendications 1 et 3 à 7, caractérisé en ce que lesdits premier (β) et/ou deuxième (4) et/ou troisième (7) organe (s) dilatable (s) /rétractable (s) sont un (des) vérin (s) électrique (s) . Immobilizable in a position chosen with respect to this same part (9), a first expandable / retractable member (6) being anchored, on the one hand, on the end of said first element opposite to that which is secured to the file and, on the other hand, on the end of said second element opposite the axis of rotation. 2. Seat according to claim 1, characterized in that said first expandable / retractable member is a gas spring (β). 3. Seat according to claim 1 or 2, characterized in that the anchoring point (13) of said first expandable / retractable member (6) on said rotating support (10) of the backrest (2) is adjustable along said support . 4. Seat according to any one of claims 1 to 3, characterized in that said sliding support of the seat (1) has a stop (18) limiting the pivoting of the backrest (2) relative to the seat (1). 5. Seat according to any one of claims 1 to 4, further comprising a seat support (5), characterized in that said seat support (5) provides an anchor point for one of the ends d 'a second expandable / retractable member (4), the other end of which is anchored on said seat (1). 6. Seat according to claim 5, characterized in that the first (6) and second (4) expandable / retractable members operate independently of one another. 7. Seat according to any one of claims 1 to 5, further comprising a legrest (3), characterized in that said legrest (3) offers an anchor point for one of the ends of a third expandable / retractable member (7), the other end of which is anchored on said seat (1). 8. Seat according to claim 7, characterized in that the first (β), second (4) and third (7) expandable / retractable members operate independently of each other. 9. Seat according to any one of claims 5 to 7, characterized in that said second (4) and / or third (7) member (s) expandable (s) / retractable (s) is (are) one (of ) pneumatic cylinder (s). 10. Seat according to any one of claims 1 and 3 to 7, characterized in that said first (β) and / or second (4) and / or third (7) member (s) expandable (s) / retractable ( s) are one (or more) electric actuator (s).
PCT/FR2005/000547 2004-03-09 2005-03-08 Seat with a separately adjustable back rest and seat portion and an adjustable seat depth WO2005087051A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05735539A EP1722657B1 (en) 2004-03-09 2005-03-08 Seat with a separately adjustable back rest and seat portion and an adjustable seat depth
US10/591,942 US20070194612A1 (en) 2004-03-09 2005-03-08 Seat with a separately adjustable back rest and seat portion and an adjustable seat depth
AT05735539T ATE508662T1 (en) 2004-03-09 2005-03-08 SEAT WITH SEPARATELY ADJUSTABLE BACKREST AND SEAT PART AND AN ADJUSTABLE SEAT DEPTH

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0402432A FR2867364B1 (en) 2004-03-09 2004-03-09 INDEPENDENTLY RECLINING FOLDER AND SEAT WITH ADJUSTABLE SEAT DEPTH
FR0402432 2004-03-09

Publications (2)

Publication Number Publication Date
WO2005087051A2 true WO2005087051A2 (en) 2005-09-22
WO2005087051A3 WO2005087051A3 (en) 2005-11-24

Family

ID=34896395

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2005/000547 WO2005087051A2 (en) 2004-03-09 2005-03-08 Seat with a separately adjustable back rest and seat portion and an adjustable seat depth

Country Status (5)

Country Link
US (1) US20070194612A1 (en)
EP (1) EP1722657B1 (en)
AT (1) ATE508662T1 (en)
FR (1) FR2867364B1 (en)
WO (1) WO2005087051A2 (en)

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Also Published As

Publication number Publication date
US20070194612A1 (en) 2007-08-23
FR2867364B1 (en) 2007-10-05
WO2005087051A3 (en) 2005-11-24
EP1722657B1 (en) 2011-05-11
EP1722657A2 (en) 2006-11-22
FR2867364A1 (en) 2005-09-16
ATE508662T1 (en) 2011-05-15

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