EP1722657B1 - 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
EP1722657B1
EP1722657B1 EP05735539A EP05735539A EP1722657B1 EP 1722657 B1 EP1722657 B1 EP 1722657B1 EP 05735539 A EP05735539 A EP 05735539A EP 05735539 A EP05735539 A EP 05735539A EP 1722657 B1 EP1722657 B1 EP 1722657B1
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EP
European Patent Office
Prior art keywords
seat
extendable
seat portion
back rest
backrest
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EP05735539A
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German (de)
French (fr)
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EP1722657A2 (en
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Roger Prieur
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Individual
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Individual
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    • 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 present invention relates to a seat of the type comprising a seat and a backrest, articulated relative to each other about an axis of rotation.
  • the present invention relates to a seat of the aforementioned type, wherein said hinge is formed 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 being constituted, on the one hand, of a first element, forming a support in rotation of the file, traversed by said axis of rotation, and one end of which is secured to said file and, on the other hand, a second element.
  • the depth of the seat is adapted to its size. It is indeed just as uncomfortable for a tall person to have thighs that extend far beyond the front of the seat than for a small person waist not to have feet touching the ground when sitting at the bottom of the seat.
  • the invention proposes to provide a new solution to this problem by combining the backrest / seat joint to adjust the depth of the seat.
  • the support in rotation of the backrest is movable in translation relative to the seat.
  • the first expandable / retractable member is a gas spring, i.e. a hydro-pneumatic cylinder and piston structural element, which allows the backrest to be pivoted and counterbalanced. movement at a controlled speed, under the effect of the sole support exerted by the bust of the user on the folder.
  • the sliding support of the seat advantageously comprises a stop limiting the pivoting of the backrest relative to the seat.
  • the sliding support of the seat slides relative to a part secured to the seat and is immobilisable relative to this same room.
  • the support in rotation of the backrest and the sliding support of the seat being secured via the axis of rotation, it follows that the support in rotation of the backrest also slides relative to the part secured to the seat and that, As a result, the backrest can be more or less close to the free edge of the seat (in other words, the depth of the seat can be greater or lesser).
  • the backrest In the reclining seats, such as the seats of motor vehicles and aircraft, the backrest can be more or less inclined relative to the general plan of the seat which remains fixed. There are also known seats in which the inclination of the backrest causes the tilting of the seat upwards, and vice versa.
  • 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 seat.
  • second expandable / retractable member, the other end is anchored to the seat.
  • This second expandable expandable member may be a pneumatic cylinder or an electric cylinder.
  • the seat is a relaxation chair and, for this purpose, it further comprises a legrest.
  • legrest Since, again, it is important for the legrest to be able to 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 the seat. a third expandable / retractable member, the other end is anchored to the seat.
  • This third retractable expandable member may be a pneumatic jack or an electric jack.
  • first, second and third expandable / retractable members operate independently of one another.
  • the seat 1 makes, with the backrest 2, an angle ⁇ which is variable ( ⁇ 1 ⁇ 2 ⁇ 3) and, with the legrest 3 an angle ⁇ which is also variable ( ⁇ 1 ⁇ 2 ⁇ 3), and the variation of ⁇ is independent of that of ⁇ .
  • the three planes (plan of the seat 1, plane of the backrest 2 and plan of the legrest 3) are movable independently of each other.
  • the inclination of the seat 1 with respect 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 sitting 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 folder 2;
  • the inclination of the legrest 3 relative to the seat 1 is obtained by means of a pneumatic cylinder 7 which is supported, on the one hand, on said seat 1 and, on the other hand, on said seat 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 appropriate , user support on the armrests (not shown). It will be understood that the backrest 2 returns automatically since, when it is inclined by support of the bust, the gas spring gas is compressed and, as soon as the support is released, the gas relaxes.
  • Pneumatic cylinders 4 and 7 are controlled, in a very conventional manner, by a push button.
  • the pneumatic cylinders 4 and 7 could be replaced by electric cylinders retaining the gas spring 6 for operating the backrest 2, or 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 that can be adjustable in height.
  • the legrest 3 incorporated in the chair 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 casters in constant contact with the ground, casters thanks to which the deployment needs only to be initiated, the bulk of the movement of deployment is doing under the effect of mere gravity.
  • FIG. 3 it details the hinge area 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 side face.
  • the reference 8 designates an integral part of the file and the reference 9 designates a part integral with the seat.
  • the articulation comprises a first element 10, said “support in rotation of the backrest” and a second element 11, said “sliding support of the seat", the elements 10 and 11 being joined by an axis of rotation 12.
  • the element 10 roughly has a cocked hat shape, 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 piece 8 integral with the backrest and, at its opposite end, the element 10 provides an anchor point 13 for the rod 14 of the piston of the gas spring 6 whose cylinder 15 is anchored at 16 on the second element 11. A set screw 17 can move the anchor point 13 and thus increase or reduce the piston stroke of the gas spring 6.
  • a stop 18 limits the pivoting of the element 10 and thus of the backrest 2.
  • the element 11 comprises adjustment holes such as 19 coming opposite slits, as arranged 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 selected position by screwing bolts, such as 21, passing through both a hole 19 and a slot 20.
  • This assembly thus makes it possible both to adjust the control of the inclination of the backrest according to the weight of the user (playing on the level of the anchoring point 13) and that of the depth of the seat (playing on the relative position of the element 11 and the part 9).
  • the result of the adjustment of the depth of the seat is schematically illustrated by the Figures 1d-1f .
  • the figure 1d is identical to the figure 1a and shows a maximum seat depth P1, the base of the backrest 2 coinciding with the rear edge of the seat 1.
  • the figure 1e shows a shallower seat depth P2 ⁇ P1 by relative displacement between the backrest 2 and the seat 1, with preservation of the angles ⁇ 1 and ⁇ 1, and the figure 1f shows an even lower seat depth P3 ⁇ P2 ⁇ P1 by relative movement between the backrest 2 and the seat 1, and always with conservation angles ⁇ 1 and ⁇ 1.
  • the three illustrated positions are only three examples, any intermediate position being possible and that the modification of the seat depth is possible regardless of ⁇ and ⁇ .

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  • 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

The seat has a base (1) inclined with respect to floor by utilizing a pneumatic jack (4). A backrest (2) is inclined with respect to the base by utilizing a spring (6). A base support (5) provides an anchoring point for one end of the jack having another end anchored on the base. A leg-rest (3) provides an anchoring point for one end of a pneumatic jack (7) which is supported on the base and on the leg-rest.

Description

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.The present invention relates to a seat of the type comprising a seat and a backrest, articulated relative to each other about an axis of 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 dossier et, d'autre part, d'un second élément.More specifically, the present invention relates to a seat of the aforementioned type, wherein said hinge is formed 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 being constituted, on the one hand, of a first element, forming a support in rotation of the file, traversed by said axis of rotation, and one end of which is secured to said file and, on the other hand, a second element.

On connaît un siège répondant à une telle définition d'après la demande de brevet américaine US2003/0011226 A1 . 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 cadré d'assise 10 de sorte que, lorsque l'armature d'assise coulisse, l'armature de dossier ne peut que suivre.There is a known seat according to such a definition according to the US 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 a 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 formed in the seat frame 10 so that when the seat frame slides, the backrest frame can only follow.

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.No means is provided for adjusting the seat depth and such a setting is quite impossible given the threading of the backrest frame in the seat frame.

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.However, an important element of user comfort is that the depth of the seat is adapted to its size. It is indeed just as uncomfortable for a tall person to have thighs that extend far beyond the front of the seat than for a small person waist not to have feet touching the ground when sitting at the bottom of the seat.

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.The invention proposes to provide a new solution to this problem by combining the backrest / seat joint to adjust the depth of the seat.

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

  • 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,
  • 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.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
  • distinct from the seat,
  • secured to said first element through said axis of rotation passing through said second element in the vicinity of one of its ends and said first element,
  • sliding climb on a piece secured to the seat and
  • immobilisable in a chosen position with respect 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 backrest and, on the other hand, on the end of said second element opposite to the axis of 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.With this arrangement, as will be developed further, the support in rotation of the backrest is movable in translation relative to the seat.

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.In a preferred embodiment, the first expandable / retractable member is a gas spring, i.e. a hydro-pneumatic cylinder and piston structural element, which allows the backrest to be pivoted and counterbalanced. movement at a controlled speed, under the effect of the sole support exerted by the bust of the user on the folder.

La force de cet appui étant fonction du poids de l'utilisateur, il est utile de pouvoir régler en conséquence le ressort à gaz.The strength of this support being a function of the weight of the user, it is useful to adjust the gas spring accordingly.

A cette fin, son point d'ancrage sur ledit support en rotation du dossier est réglable au long dudit support.To this end, its anchoring point on said support in rotation of the backrest is adjustable along said support.

Ainsi, on peut choisir la longueur de la course du piston du ressort à gaz et, donc, sa résistance.Thus, one can choose the length of the stroke of the piston of the gas spring and, therefore, its resistance.

Le support en coulissement de l'assise comporte avantageusement une butée limitant le pivotement du dossier par rapport à l'assise.The sliding support of the seat advantageously comprises a stop limiting the pivoting of the backrest relative to the seat.

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).As indicated above, the sliding support of the seat slides relative to a part secured to the seat and is immobilisable relative to this same room. The support in rotation of the backrest and the sliding support of the seat being secured via the axis of rotation, it follows that the support in rotation of the backrest also slides relative to the part secured to the seat and that, As a result, the backrest can be more or less close to the free edge of the seat (in other words, the depth of the seat can be greater or lesser).

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.In the reclining seats, such as the seats of motor vehicles and aircraft, the backrest can be more or less inclined relative to the general plan of the seat which remains fixed. There are also known seats in which the inclination of the backrest causes the tilting of the seat upwards, and 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.For a better comfort, however, it would be desirable that, in the same seat, not only the angle between the backrest and the seat can be changed at the request, but also that the angle between the general plan of the seat and the soil can be so, and these two modifications are independent of each other.

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.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 seat. second expandable / retractable member, the other end is anchored to the seat.

Ce deuxième organe dilatable rétractable peut être un vérin pneumatique ou un vérin électrique.This second expandable expandable member may be a pneumatic cylinder or an electric cylinder.

Ainsi, il est possible d'incliner le dossier et l'assise indépendamment l'un de l'autre.Thus, it is possible to tilt the backrest and the seat independently of one another.

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.In a preferred embodiment of the invention, the seat is a relaxation chair and, for this purpose, it further comprises a legrest.

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.Since, again, it is important for the legrest to be able to 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 the seat. a third expandable / retractable member, the other end is anchored to the seat.

Ce troisième organe dilatable rétractable peut être un vérin pneumatique ou un vérin électrique.This third retractable expandable member may be a pneumatic jack or an electric jack.

Ainsi, les premier, deuxième et troisième organes dilatables/rétractables fonctionnent indépendamment les uns des autres.Thus, the first, second and third expandable / retractable members operate independently of one another.

L'invention sera mieux comprise à la lecture de la description suivante faite en référence aux dessins annexés dans lesquels :

  • les figures 1a-1c 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 1d-1f 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).
The invention will be better understood on reading the following description given with reference to the accompanying drawings in which:
  • the Figures 1a-1c schematically represent the respective planes of the three main components (seat, back and legrests) of a relaxation chair according to the invention and the Figures 1d-1f schematically represent three possible seat depths thanks to the invention;
  • the figure 2 is a diagram showing the implantation of the three expandable / retractable control members;
  • the figure 3 is a detailed view of the area of articulation between the backrest and the seat and
  • the figure 4 is a detailed view of the articulation of the figure 3 , seen from the back of the seat (arrow F on the figure 3 ).

Si l'on se réfère aux figures 1a-1c, 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 1a), en position de relaxation (figure 1b) et en position "gravité zéro" (coeur plus bas que le repose-jambes) (figure 1c).If we refer to Figures 1a-1c , we see the position occupied by the respective planes of the seat 1, the backrest 2 and the legrest 3, in "sitting" position ( figure 1a ), in the relaxation position ( figure 1b ) and in position "zero gravity" (heart lower than the legrest) ( figure 1c ).

L'assise 1 fait, avec le dossier 2, un angle α qui est variable (α1 < α2 < α3) et, avec le repose-jambes 3 un angle β qui est également variable (β1 < β2 < β3) , et la variation de α est indépendante de celle de β.The seat 1 makes, with the backrest 2, an angle α which is variable (α1 <α2 <α3) and, with the legrest 3 an angle β which is also variable (β1 <β2 <β3), and the variation of α is independent of that of 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.The three planes (plan of the seat 1, plane of the backrest 2 and plan of the legrest 3) are movable independently of each other.

A cette fin, comme il ressort de la figure 2, trois organes de manoeuvre sont prévus.To this end, as is apparent from the figure 2 three actuators are provided.

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 l'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 manoeuvre du dossier 2, ou bien le ressort à gaz 6 pourrait, lui aussi, être remplacé par un vérin électrique.More specifically, the inclination of the seat 1 with respect 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 sitting 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 folder 2; and the inclination of the legrest 3 relative to the seat 1 is obtained by means of a pneumatic cylinder 7 which is supported, on the one hand, on said seat 1 and, on the other hand, on said seat 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 appropriate , user support on the armrests (not shown). It will be understood that the backrest 2 returns automatically since, when it is inclined by support of the bust, the gas spring gas is compressed and, as soon as the support is released, the gas relaxes. Pneumatic cylinders 4 and 7 are controlled, in a very conventional manner, by a push button. The pneumatic cylinders 4 and 7 could be replaced by electric cylinders retaining the gas spring 6 for operating the backrest 2, or the gas spring 6 could also be replaced by an electric cylinder.

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.It is understood that the seat 1 pivots around the point P. The seat support 5 is provided with feet that can be adjustable in height.

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.The legrest 3 incorporated in the chair 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 casters in constant contact with the ground, casters thanks to which the deployment needs only to be initiated, the bulk of the movement of deployment is doing under the effect of mere gravity.

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.If we come to the figure 3 , it details the hinge area 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 side face. The reference 8 designates an integral part of the file and the reference 9 designates a part integral with the seat. The articulation comprises a first element 10, said "support in rotation of the backrest" and a second element 11, said "sliding support of the seat", the elements 10 and 11 being joined by an axis of rotation 12.

Comme on le voit, 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.As can be seen, the element 10 roughly has a cocked hat shape, 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 piece 8 integral with the backrest and, at its opposite end, the element 10 provides an anchor point 13 for the rod 14 of the piston of the gas spring 6 whose cylinder 15 is anchored at 16 on the second element 11. A set screw 17 can move the anchor point 13 and thus increase or reduce the piston stroke of the gas spring 6.

Une butée 18 limite le pivotement de l'élément 10 et donc du dossier 2.A stop 18 limits the pivoting of the element 10 and thus of the backrest 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.As is best understood from the figure 4 , the element 11 comprises adjustment holes such as 19 coming opposite slits, as arranged 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 selected position by screwing bolts, such as 21, passing through both a hole 19 and a slot 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).This assembly thus makes it possible both to adjust the control of the inclination of the backrest according to the weight of the user (playing on the level of the anchoring point 13) and that of the depth of the seat (playing on the relative position of the element 11 and the part 9).

Le résultat du réglage de la profondeur de l'assise est illustré schématiquement par les figures 1d-1f. La figure 1d est identique à la figure 1a et montre une profondeur d'assise maximale P1, la base du dossier 2 coïncidant avec le bord arrière de l'assise 1. La figure 1e montre une plus faible profondeur d'assise P2<P1 par déplacement relatif entre le dossier 2 et l'assise 1, avec conservation des angles α1 et β1, et la figure 1f 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 α1 et β1. 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.The result of the adjustment of the depth of the seat is schematically illustrated by the Figures 1d-1f . The figure 1d is identical to the figure 1a and shows a maximum seat depth P1, the base of the backrest 2 coinciding with the rear edge of the seat 1. The figure 1e shows a shallower seat depth P2 <P1 by relative displacement between the backrest 2 and the seat 1, with preservation of the angles α1 and β1, and the figure 1f shows an even lower seat depth P3 <P2 <P1 by relative movement between the backrest 2 and the seat 1, and always with conservation angles α1 and β1. It will be understood that the three illustrated positions are only three examples, any intermediate position being possible and that the modification of the seat depth is possible regardless of α and 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.It is understood that these settings, which involve the use of tools, will usually be made at installation, depending on the person to whom the chair is intended. Thus, the same home can be equipped with two exactly identical chairs, but one set for a light person and small and the other for a tall and heavy person.

Claims (10)

  1. Seat of the type comprising a seat portion (1) and a back rest (2), hinged to one another about an axis of rotation (12), said hinging being achieved in the form of a pair of means located on either side of the seat about a plane of symmetry passing through the back rest (2) and the seat portion (1), each of said means consisting of, on the one hand, a first element (10), forming a back rest (2) rotation support, through which said axis of rotation (12) passes and one end of which is integral with said back rest (2), and, on the other hand, a second element (11), characterized in that said second element (11) is a part which is
    • separate from the seat portion (1),
    • integral with said first element (10) via said axis of rotation (12) which passes through said second element near one of its ends and said first element,
    • mounted so as to be able to slide on a part (9) integral with the seat portion (1) and
    • immobilizable in a desired position with respect to this same part (9),
    a first extendable/retractable member (6) being fastened, on the one hand, to the end of said first element opposite the end which is integral with the back rest and, on the other hand, to the end of said second element which is opposite the axis of rotation.
  2. Seat according to Claim 1, characterized in that said first extendable/retractable member is a gas spring (6) .
  3. Seat according to Claim 1 or 2, characterized in that the point (13) of fastening of said first extendable/retractable member (6) to said back rest (2) rotation support (10) is adjustable along said support.
  4. Seat according to any one of Claims 1 to 3, characterized in that said seat portion (1) sliding support comprises a stop (18) limiting the pivoting of the back rest (2) with respect to the seat portion (1).
  5. Seat according to any one of Claims 1 to 4, also comprising a seat portion support (5), characterized in that this seat portion support (5) has a point of fastening for one of the ends of a second extendable/retractable member (4) whose other end is fastened to said seat portion (1).
  6. Seat according to Claim 5, characterized in that the first (6) and second (4) extendable/retractable members function independently of one another.
  7. Seat according to any one of Claims 1 to 5, also comprising a leg rest (3), characterized in that said leg rest (3) has a point of fastening for one of the ends of a third extendable/retractable member (7) whose other end is fastened to said seat portion (1).
  8. Seat according to Claim 7, characterized in that the first (6), second (4) and third (7) extendable/retractable members function independently of one another.
  9. Seat according to any one of Claims 5 to 7, characterized in that said second (4) and/or third (7) extendable/retractable member(s) is/are (a) pneumatic jack(s).
  10. Seat according to any one of Claims 1 and 3 to 7, characterized in that said first (6) and/or second (4) and/or third (7) extendable/retractable member(s) is/are (an) electric jack(s).
EP05735539A 2004-03-09 2005-03-08 Seat with a separately adjustable back rest and seat portion and an adjustable seat depth Active EP1722657B1 (en)

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
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

Publications (2)

Publication Number Publication Date
EP1722657A2 EP1722657A2 (en) 2006-11-22
EP1722657B1 true EP1722657B1 (en) 2011-05-11

Family

ID=34896395

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05735539A Active EP1722657B1 (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)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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FR2955755B1 (en) * 2010-02-04 2012-02-24 Variation INCLINATION SYSTEM WITH MORPHOLOGICAL ADJUSTMENT FOR RELAXATION ARMCHAIR
EP3031724B1 (en) * 2014-12-08 2019-03-06 Volvo Car Corporation A reclinable seat
WO2019137955A1 (en) * 2018-01-09 2019-07-18 Superseating Bvba Seating assembly for improved seating, ergonomic chairs or wheelchairs

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Also Published As

Publication number Publication date
ATE508662T1 (en) 2011-05-15
EP1722657A2 (en) 2006-11-22
WO2005087051A2 (en) 2005-09-22
US20070194612A1 (en) 2007-08-23
FR2867364A1 (en) 2005-09-16
WO2005087051A3 (en) 2005-11-24
FR2867364B1 (en) 2007-10-05

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