EP2005861B1 - System for adjusting the height of a seat back - Google Patents

System for adjusting the height of a seat back Download PDF

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Publication number
EP2005861B1
EP2005861B1 EP07360027A EP07360027A EP2005861B1 EP 2005861 B1 EP2005861 B1 EP 2005861B1 EP 07360027 A EP07360027 A EP 07360027A EP 07360027 A EP07360027 A EP 07360027A EP 2005861 B1 EP2005861 B1 EP 2005861B1
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EP
European Patent Office
Prior art keywords
backrest
sleeve
rod
arm
seat
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EP07360027A
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German (de)
French (fr)
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EP2005861A1 (en
Inventor
Jean-Francois Host
Jean-Antoine Krommenaker
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Steelcase SA
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Steelcase SA
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Application filed by Steelcase SA filed Critical Steelcase SA
Priority to DE602007014027T priority Critical patent/DE602007014027D1/en
Priority to ES07360027T priority patent/ES2363611T3/en
Priority to AT07360027T priority patent/ATE505977T1/en
Priority to EP07360027A priority patent/EP2005861B1/en
Publication of EP2005861A1 publication Critical patent/EP2005861A1/en
Application granted granted Critical
Publication of EP2005861B1 publication Critical patent/EP2005861B1/en
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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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/402—Support for the head or the back for the back adjustable in height

Definitions

  • the present invention relates to a system for adjusting the height of the back of a seat allowing a discreet adjustment of said height relative to the seat cushion.
  • the user can choose to position the folder at a plurality of predetermined heights.
  • One of the objectives of the invention is to provide not only a simple and reliable system, but also that can allow an immediate assembly without tool backrest on the rest of the seat.
  • One of the expected benefits is to be able to deliver the seat in several pieces, including the separate seat of the folder, so as to gain volume in packaging and delivery.
  • the device described in this document also comprises means capable of coming selectively and resiliently engaged with a toothed portion to ensure the stability of the position of the slide relative to the sleeve. More specifically, these elastic means are able to slide freely along a passive side of teeth of said toothed portion while the backrest is rising, while they are blocked by the active side of said teeth after each passage over one of them. These elastic means, in fact a spring rod, after their elastic reaction and for each predetermined position of the slide relative to the sleeve, can be disengaged from the teeth to allow the slide to slide under the effect of gravity in a canal portion straight.
  • This configuration is very simple to implement, since it suffices to insert the arm of the folder in the sleeve to obtain a locking of one in the other followed by a possibility of incremental adjustment of the position in height of relative to each other.
  • the sections thereof are connected by a rounded outer wall.
  • the adjustment piece is secured to the backrest arm, the opening opening of the guiding circuit opening at the free end of said arm adapted to be inserted into the sleeve.
  • the spring rod is then secured to said sleeve, the folded end being in the vicinity of the opening thereof.
  • Locking the arm to the sleeve begins with a sliding movement from one to the other until the backrest is in the down position.
  • the positioning adjustment can then begin by incrementally raising the folder to the desired height.
  • the sleeve is provided with two half-shells forming guide sleeve of the backrest arm, the spring rod being moreover fixed to one of these half-shells.
  • Such a configuration facilitates, on the one hand, the fixing of the elastic rod in a position which enables it to fulfill its function with respect to the guide piece, and on the other hand makes it possible to improve the accuracy of the sliding of the arm relative to the sleeve. .
  • one of the half-shells comprises a retractable finger placed on an elastic tab, said finger being inserted by elastic clipping into an orifice of the sleeve.
  • the guide circuit acts as previously mentioned in closed circuit for guiding the folded end of the elastic rod.
  • the backrest arm is locked in the sleeve secured to the seat.
  • the retractable finger can disassemble the sleeve and therefore the backrest of the rest of the seat, if necessary.
  • the vertical-looking backrest arm (1) supports a horizontal-looking structure (2) to which the backrest (not shown) is attached.
  • the backrest arm (1) comprises a guide piece (3) provided with a guide channel (4).
  • the back arm (1) slides in a sleeve (5) connected to the seat cushion (not shown) via a sleeve consisting of two half-shells (6, 7).
  • the latter assembled, form said sleeve fixed in the sleeve (5) by clipping by means of a finger (8) located at the end of a tab (9) elastic formed in the body of the half-shell (6). ), and adapted to fit elastically into the orifice (10).
  • the half-shells (6) and (7) also comprise an upper flange (11, 12) bearing on the upper edge of the sleeve (5).
  • An elastic rod (13), for example of metal, having an upper end (14) bent at about 90 ° to the axis of the rod (13) is fixed to the inner wall of the half-shell (6) . It is positioned therein so that the end (14) can cooperate with the guide channel (4) of the workpiece (3).
  • the figure 2 shows the precise configuration of the guide piece, having an inlet mouth (15) followed by a first rectilinear portion (16) developing in parallel with a sinuous portion (17), taking more precisely the shape of a zig -zag.
  • the two portions (16, 17) are connected by a section (18) inclined at approximately 45 °.
  • a second section (19) having an inverted inclination connects the second portion (17) to the first portion (16).
  • the whole forms the closed circuit of guidance.
  • the central axis AA 'of the zig-zag corresponds to the position of relaxation of the rod (13).
  • Each section of the zig-zag has a notch (20) disposed along the axis A-A '. Each of these notches (20) allows locking in a stable position of the backrest relative to the rest of the seat.
  • the figure 3e shows the locking in the low position of the backrest. This locking is done in the notch (20) at the outlet of the section (18), and which corresponds to an expansion position of the rod (13).
  • Disassembly is therefore possible only by removing the half-shells (6) and (7) forming the sleeve in which the rod (13) is fixed, by manipulation of the finger (8).
  • the above description shows only one possible example of configuration, which is however not at all limited to the invention.

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  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

The system has a guiding piece (3) comprising a rectilinear channel portion arranged parallel to a sliding direction and a zigzag channel portion endowed of a set of stable positioning areas of an arm (1) in a sleeve locked by a flexible spring rod (13) e.g. metal rod. The portions are coupled to one of ends of a zigzag channel of the latter section by a part laterally opening in the former portion rectilinear to neighboring of an inlet orifice of a circuit elastically restraining a rod to the former portion and to another end by a part elastically releasing the rod to the former section. Independent claims are also included for the following: (1) a system for fixing a backrest to a base of a seat (2) a method for mounting a backrest to a base of a seat.

Description

La présente invention a trait à un système de réglage en hauteur du dossier d'un siège permettant un ajustement discret de ladite hauteur par rapport à l'assise du siège. En d'autres termes, l'utilisateur peut choisir de positionner le dossier selon une pluralité de hauteurs prédéterminées.The present invention relates to a system for adjusting the height of the back of a seat allowing a discreet adjustment of said height relative to the seat cushion. In other words, the user can choose to position the folder at a plurality of predetermined heights.

Un des objectifs de l'invention est de proposer non seulement un système simple et fiable, mais encore qui puisse permettre un montage immédiat et sans outil du dossier sur le reste du siège. L'un des avantages attendus est de pouvoir livrer le siège en plusieurs pièces, avec notamment l'assise séparée du dossier, de manière à gagner du volume à l'emballage et à la livraison.One of the objectives of the invention is to provide not only a simple and reliable system, but also that can allow an immediate assembly without tool backrest on the rest of the seat. One of the expected benefits is to be able to deliver the seat in several pieces, including the separate seat of the folder, so as to gain volume in packaging and delivery.

Selon l'invention, le système de réglage est notamment constitué par :

  • un bras solidaire du dossier ;
  • un manchon relié à l'assise et formant glissière pour le bras du dossier ;
  • une tige ressort flexible apte à être fléchie dans une direction perpendiculaire au coulissement, et présentant au moins une extrémité repliée ;
  • une pièce de guidage comportant des moyens de guidage en circuit fermé de l'extrémité repliée en réponse à des déplacements par coulissement du bras dans le manchon, lesdits moyens de guidage présentant une première portion en canal rectiligne parallèle à la direction du coulissement et une seconde portion dotée d'une pluralité de zones de positionnement stable du bras dans le manchon verrouillées par la tige ressort.
According to the invention, the adjustment system consists in particular of:
  • an arm attached to the backrest;
  • a sleeve connected to the seat and forming a slide for the backrest arm;
  • a flexible spring rod adapted to be bent in a direction perpendicular to the sliding, and having at least one folded end;
  • a guide piece having means for guiding the end folded in closed circuit in response to displacements by sliding of the arm in the sleeve, said guide means having a first rectilinear channel portion parallel to the sliding direction and a second portion having a plurality of stable positioning zones of the arm in the sleeve locked by the spring rod.

Des systèmes de ce type sont déjà connus. Ainsi, en particulier, le document EP 0 932 353 en décrit un, dans lequel le manchon est solidaire d'une plaque support de l'assise du siège, une coulisse supportant le dossier étant apte à s'engager dans et à glisser le long du manchon de guidage.Systems of this type are already known. So, in particular, the document EP 0 932 353 describes one, in which the sleeve is secured to a support plate of the seat of the seat, a slide supporting the backrest being adapted to engage in and slide along the guide sleeve.

Le dispositif décrit dans ce document comporte par ailleurs des moyens capables de venir sélectivement et élastiquement en prise avec une portion dentée permettant d'assurer la stabilité de la position de la coulisse par rapport au manchon. Plus précisément, ces moyens élastiques sont aptes à glisser librement le long d'un côté passif de dents de ladite portion dentée pendant que le dossier monte, alors qu'ils sont bloqués par le côté actif desdites dents après chaque passage par dessus l'une d'elles. Ces moyens élastiques, en fait une tige ressort, après leur réaction élastique et pour chaque position prédéterminée de la coulisse par rapport au manchon, peuvent être désengagés des dents pour permettre à la coulisse de coulisser sous l'effet de la gravité dans une portion canalaire rectiligne.The device described in this document also comprises means capable of coming selectively and resiliently engaged with a toothed portion to ensure the stability of the position of the slide relative to the sleeve. More specifically, these elastic means are able to slide freely along a passive side of teeth of said toothed portion while the backrest is rising, while they are blocked by the active side of said teeth after each passage over one of them. These elastic means, in fact a spring rod, after their elastic reaction and for each predetermined position of the slide relative to the sleeve, can be disengaged from the teeth to allow the slide to slide under the effect of gravity in a canal portion straight.

Le système de réglage de l'invention propose une configuration alternative qui ne comporte pas de portion dentée, mais présentent les caractéristiques suivantes :

  • la seconde portion consiste en un canal en zig-zag s'orientant parallèlement à la première portion et présentant une symétrie d'axe correspondant à la position de détente de la tige ressort ;
  • une encoche est pratiquée au niveau de l'axe de symétrie dans le côté de chaque section du zig-zag orientée à l'opposé du sens de déplacement de l'extrémité repliée de la tige ;
  • la première et la seconde portions sont reliées à l'une des extrémités du canal en zig-zag par un tronçon s'ouvrant latéralement dans la première portion rectiligne au voisinage d'une bouche d'entrée du circuit contraignant élastiquement la tige vers ladite première portion, et à l'autre extrémité du canal en zig-zag par un tronçon relâchant élastiquement la tige vers la première section du zig-zag.
The adjustment system of the invention proposes an alternative configuration which has no toothed portion but has the following characteristics:
  • the second portion consists of a zig-zag channel oriented parallel to the first portion and having an axis symmetry corresponding to the detent position of the spring rod;
  • a notch is made at the axis of symmetry in the side of each section of the zig-zag oriented opposite the direction of movement of the folded end of the rod;
  • the first and second portions are connected to one end of the zig-zag channel by a section opening laterally in the first rectilinear portion in the vicinity of an inlet mouth of the circuit elastically constraining the rod towards said first portion, and at the other end of the zig-zag channel by a section resiliently releasing the rod to the first section of the zig-zag.

Cette configuration est très simple à mettre en oeuvre, puisqu'il suffit d'insérer le bras du dossier dans le manchon pour obtenir un verrouillage de l'un dans l'autre suivi d'une possibilité de réglage incrémental de la position en hauteur de l'un par rapport à l'autre.This configuration is very simple to implement, since it suffices to insert the arm of the folder in the sleeve to obtain a locking of one in the other followed by a possibility of incremental adjustment of the position in height of relative to each other.

Une configuration de ce type est décrite dans le document EP 1 698 256 , mais sans canal en zig-zag ni encoche pratiquée au niveau de l'axe de symétrie. Il s'agit plutôt d'une structure à chevrons inclinés impliquant un mouvement de coulissement saccadé car l'axe est déporté latéralement.A configuration of this type is described in the document EP 1 698 256 , but without zig-zag channel or notch made at the axis of symmetry. It's about rather an inclined chevron structure involving a jerky sliding movement because the axis is offset laterally.

Pour faciliter le guidage de l'extrémité repliée de la tige ressort dans la portion en zig-zag, les sections de celle-ci sont reliées par une paroi extérieure arrondie.To facilitate the guide of the folded end of the spring rod in the zig-zag portion, the sections thereof are connected by a rounded outer wall.

Par ailleurs, selon une possibilité, la pièce de réglage est solidaire du bras du dossier, la bouche d'ouverture du circuit de guidage s'ouvrant à l'extrémité libre dudit bras prévue pour être insérée dans le manchon. La tige ressort est alors solidarisée audit manchon, l'extrémité repliée se situant au voisinage de l'ouverture de celui-ci.Furthermore, according to one possibility, the adjustment piece is secured to the backrest arm, the opening opening of the guiding circuit opening at the free end of said arm adapted to be inserted into the sleeve. The spring rod is then secured to said sleeve, the folded end being in the vicinity of the opening thereof.

Le verrouillage du bras au manchon commence par un déplacement à coulissement de l'un dans l'autre jusqu'à ce que le dossier soit en position basse. Le réglage de positionnement peut alors débuter en remontant incrémentalement le dossier jusqu'à la hauteur désirée.Locking the arm to the sleeve begins with a sliding movement from one to the other until the backrest is in the down position. The positioning adjustment can then begin by incrementally raising the folder to the desired height.

En réalité, selon l'invention, le manchon est muni de deux demi-coques formant douille de guidage du bras du dossier, la tige ressort étant d'ailleurs fixée à l'une de ces demi-coques.In fact, according to the invention, the sleeve is provided with two half-shells forming guide sleeve of the backrest arm, the spring rod being moreover fixed to one of these half-shells.

Une telle configuration facilite d'une part la fixation de la tige élastique selon un positionnement lui permettant de remplir sa fonction par rapport à la pièce de guidage, et permet d'autre part d'améliorer la précision du coulissement du bras par rapport au manchon.Such a configuration facilitates, on the one hand, the fixing of the elastic rod in a position which enables it to fulfill its function with respect to the guide piece, and on the other hand makes it possible to improve the accuracy of the sliding of the arm relative to the sleeve. .

Selon une possibilité encore, une des demi-coques comporte un doigt escamotable placé sur une patte élastique, ledit doigt pouvant s'insérer par clipsage élastique dans un orifice du manchon.According to another possibility, one of the half-shells comprises a retractable finger placed on an elastic tab, said finger being inserted by elastic clipping into an orifice of the sleeve.

Compte tenu de la configuration du circuit de guidage, celui-ci agit comme on l'a mentionné auparavant en circuit fermé pour le guidage de l'extrémité repliée de la tige élastique. En d'autres termes, après la première insertion via la bouche d'ouverture, le bras du dossier est verrouillé dans le manchon solidaire de l'assise. Toutefois, le doigt escamotable permet de démonter la douille et donc le dossier du reste du siège, en cas de besoin.Given the configuration of the guide circuit, it acts as previously mentioned in closed circuit for guiding the folded end of the elastic rod. In other words, after the first insertion via the opening mouth, the backrest arm is locked in the sleeve secured to the seat. However, the retractable finger can disassemble the sleeve and therefore the backrest of the rest of the seat, if necessary.

Par ailleurs, l'invention a trait à un procédé de montage d'un dossier à la base d'un siège, comportant les étapes suivantes :

  • pourvoir la base d'un organe flexible ;
  • munir le dossier d'un logement pour l'accouplement avec ledit organe ;
  • aligner l'organe flexible avec ledit logement ; et
  • coulisser le dossier vers le bas, en forçant l'organe flexible dans le logement en direction de l'axe, au niveau des encoches pratiquées dans le côté de chaque section du zig-zag orienté à l'opposé du sens de déplacement de l'extrémité repliée de la tige.
Furthermore, the invention relates to a method of mounting a folder at the base of a seat, comprising the following steps:
  • provide the base of a flexible organ;
  • providing the back of a housing for coupling with said body;
  • aligning the flexible member with said housing; and
  • slide the backrest down, forcing the flexible member into the housing in the direction of the axis, at the notches in the side of each section of the zig-zag facing away from the direction of travel of the folded end of the stem.

L'invention va à présent être décrite plus en détail, en référence aux figures annexées, pour lesquelles :

  • la figure 1 est une vue en perspective éclatée des différents éléments participant à la liaison entre le dossier et l'assise ;
  • la figure 2 représente en élévation la partie inférieure du bras de dossier munie de la pièce de guidage ; et
  • les figures 3a à 3m montrent le fonctionnement du réglage en hauteur du dossier par rapport à l'assise.
The invention will now be described in more detail, with reference to the appended figures, for which:
  • the figure 1 is an exploded perspective view of the various elements involved in the connection between the backrest and the seat;
  • the figure 2 represents in elevation the lower part of the backrest arm provided with the guide piece; and
  • the Figures 3a to 3m show the operation of the height adjustment of the backrest relative to the seat.

En référence à la figure 1, le bras du dossier (1) d'allure verticale supporte une structure d'allure horizontale (2) à laquelle est fixé le dossier (non représenté). En partie inférieure, le bras de dossier (1) comporte une pièce de guidage (3) munie d'un canal de guidage (4). Le bras du dossier (1) coulisse dans un manchon (5) relié à l'assise du siège (non représentée) par l'intermédiaire d'une douille constituée de deux demi-coques (6, 7). Ces dernières, assemblées, forment ladite douille fixée dans le manchon (5) par clipsage au moyen d'un doigt (8) situé à l'extrémité d'une patte (9) élastique pratiquée dans le corps de la demi-coque (6), et prévue pour s'insérer élastiquement dans l'orifice (10).With reference to the figure 1 the vertical-looking backrest arm (1) supports a horizontal-looking structure (2) to which the backrest (not shown) is attached. In the lower part, the backrest arm (1) comprises a guide piece (3) provided with a guide channel (4). The back arm (1) slides in a sleeve (5) connected to the seat cushion (not shown) via a sleeve consisting of two half-shells (6, 7). The latter, assembled, form said sleeve fixed in the sleeve (5) by clipping by means of a finger (8) located at the end of a tab (9) elastic formed in the body of the half-shell (6). ), and adapted to fit elastically into the orifice (10).

Les demi-coques (6) et (7) comportent par ailleurs un rebord supérieur (11, 12) prenant appui sur le chant supérieur du manchon (5). Une tige élastique (13), par exemple en métal, comportant une extrémité supérieure (14) repliée à environ 90° par rapport à l'axe de la tige (13) est fixée sur la paroi intérieure de la demi-coque (6). Elle y est positionnée de telle sorte que l'extrémité (14) puisse coopérer avec le canal de guidage (4) de la pièce (3).The half-shells (6) and (7) also comprise an upper flange (11, 12) bearing on the upper edge of the sleeve (5). An elastic rod (13), for example of metal, having an upper end (14) bent at about 90 ° to the axis of the rod (13) is fixed to the inner wall of the half-shell (6) . It is positioned therein so that the end (14) can cooperate with the guide channel (4) of the workpiece (3).

La figure 2 montre la configuration précise de la pièce de guidage, comportant une bouche d'entrée (15) suivie d'une première portion rectiligne (16) se développant en parallèle à une portion sinueuse (17), prenant plus précisément la forme d'un zig-zag. En partie supérieure, les deux portions (16, 17) sont reliées par un tronçon (18) incliné à environ 45°. En partie basse, un second tronçon (19) présentant une inclinaison inversée relie la seconde portion (17) à la première portion (16). L'ensemble forme le circuit fermé de guidage. L'axe central A-A' du zig-zag correspond à la position de détente de la tige (13). Chaque section du zig-zag comporte une encoche (20) disposée selon l'axe A-A'. Chacune de ces encoches (20) permet un verrouillage en position stable du dossier par rapport au reste du siège.The figure 2 shows the precise configuration of the guide piece, having an inlet mouth (15) followed by a first rectilinear portion (16) developing in parallel with a sinuous portion (17), taking more precisely the shape of a zig -zag. In the upper part, the two portions (16, 17) are connected by a section (18) inclined at approximately 45 °. In the lower part, a second section (19) having an inverted inclination connects the second portion (17) to the first portion (16). The whole forms the closed circuit of guidance. The central axis AA 'of the zig-zag corresponds to the position of relaxation of the rod (13). Each section of the zig-zag has a notch (20) disposed along the axis A-A '. Each of these notches (20) allows locking in a stable position of the backrest relative to the rest of the seat.

Le fonctionnement s'éclaire par référence aux figures 3a à 3m. En figure 3a, la tige (13) n'est pas sollicitée, et elle est par conséquent positionnée selon l'axe A-A'. Lorsque le bras (1) du dossier est inséré dans le manchon (5), le chanfrein (21) de la bouche d'entrée (15) provoque une flexion vers la gauche de la tige (13), comme cela apparaît en figure 3b. En figure 3c, l'extrémité (14) de la tige pénètre dans la première portion (16) du canal (4). La progression se fait toujours dans le sens de la flèche. Arrivée à l'extrémité supérieure de la première portion (16), l'extrémité repliée (14) s'engage dans le tronçon (18) (figure 3d) en se détendant.The operation is illuminated by reference to Figures 3a to 3m . In figure 3a , the rod (13) is not stressed, and it is therefore positioned along the axis A-A '. When the arm (1) of the backrest is inserted into the sleeve (5), the chamfer (21) of the mouth (15) causes a bending to the left of the rod (13), as appears in figure 3b . In figure 3c , the end (14) of the rod enters the first portion (16) of the channel (4). The progression is always in the direction of the arrow. At the upper end of the first portion (16), the folded end (14) engages the section (18) ( figure 3d ) relaxing.

La figure 3e montre le verrouillage en position basse du dossier. Ce verrouillage se fait dans l'encoche (20) située en sortie du tronçon (18), et qui correspond à une position de détente de la tige (13).The figure 3e shows the locking in the low position of the backrest. This locking is done in the notch (20) at the outlet of the section (18), and which corresponds to an expansion position of the rod (13).

Pour aller vers les positions de verrouillage intermédiaires correspondant aux autres encoches (20) du tracé en zig-zag de la seconde portion (17), l'extrémité repliée (14) de la tige (13) s'engage dans le zig-zag, comme cela apparaît en figure 3f, jusqu'à arriver dans la position de détente de l'encoche (20) suivante, qui correspond à un second verrouillage intermédiaire (figure 3g). Pour passer du second au troisième verrouillage intermédiaire, tel que représenté en figures 3h et 3i, l'extrémité (14) progresse toujours dans le sens de la flèche, d'une encoche (20) à l'autre. La figure 3j montre le verrouillage en position haute du dossier. Le déverrouillage qui s'ensuit est montré en figure 3k, suivi du retour dans la première portion (16) apparaissant aux figures 3l et 3m.To move towards the intermediate locking positions corresponding to the other notches (20) of the zig-zag pattern of the second portion (17), the folded end (14) of the rod (13) engages in the zig-zag , as it appears in figure 3f until it reaches the detent position of the next notch (20), which corresponds to a second intermediate lock ( figure 3g ). To go from the second to the third intermediate lock, as represented in figures 3h and 3i the end (14) always progresses in the direction of the arrow from one notch (20) to the other. The figure 3j shows the locking in the high position of the backrest. The unlocking that follows is shown in figure 3k , followed by the return to the first portion (16) appearing in Figures 3l and 3m .

Le démontage du dossier n'est pas possible à ce stade car, la tige ressort étant précontrainte, si l'on inversait le sens de la flèche en figure 3m dans la première portion (16) du canal de guidage (4) l'extrémité (14) de la tige (13) ne peut que s'engager dans le tronçon (19) du canal (4) et ne peut pas ressortir.Disassembly of the backrest is not possible at this stage because, the rod spring being prestressed, if one reversed the direction of the arrow in figure 3m in the first portion (16) of the guide channel (4) the end (14) of the rod (13) can only engage in the section (19) of the channel (4) and can not come out.

Le démontage n'est par conséquent possible qu'en enlevant les demi-coques (6) et (7) formant la douille dans laquelle est fixée la tige (13), par manipulation du doigt (8). La description ci-dessus ne montre qu'un exemple possible de configuration, qui n'est cependant nullement limitatif de l'invention.Disassembly is therefore possible only by removing the half-shells (6) and (7) forming the sleeve in which the rod (13) is fixed, by manipulation of the finger (8). The above description shows only one possible example of configuration, which is however not at all limited to the invention.

Claims (6)

  1. A system for height adjusting a seat backrest, consisting of:
    - an arm (1) integral with the backrest;
    - a sleeve (5) connected to the seating and constituting a slideway for the arm (1) of the backrest;
    - a flexible spring rod (13) adapted to be bent in a direction perpendicular to the sliding motion, and having at least one folded end (14);
    - a guiding part (3) comprising guiding means (4) in closed loop with the folded end (14) in response to sliding displacements of the arm (1) inside the sleeve (5), said guiding means (4) comprising a first straight channel portion (16) parallel to the sliding direction, and a second portion (17) provided with a plurality of stable positioning areas (20) of the arm (1) inside the sleeve (5) locked by the spring rod (13),
    wherein
    - the second portion (17) consists of a zigzag channel oriented in parallel to the first portion (16) and having a symmetry with an axis A-A' corresponding to the released position of the spring rod (13);
    - a notch (20) is made at the axis of symmetry A-A' in the side of each section of the zigzag oriented opposite the direction of displacement of the folded end (14) of the rod (13);
    - the two portions (16, 17) are connected to one of the ends of the zigzag channel by a division (19) laterally opening into the first straight portion (16) in the vicinity of an input mouth (15) of the circuit elastically biasing the rod (13) toward said first portion (16), and at the other end by a division (18) elastically releasing the rod (13) toward the first section of the zigzag.
  2. The system for height adjusting a seat backrest according to the preceding claim, characterized in that the sections of the zigzag channel are connected by a rounded exterior wall.
  3. The system for height adjusting a seat backrest according to any of the preceding claims, characterized in that the guiding part (3) is integral with the arm (1) of the backrest, the opening mouth (15) of the guiding circuit opening at the free end of the arm (1) provided to be inserted into the sleeve (5), the spring rod (13) being integral with said sleeve (5), the folded end (14) thereof being located in the vicinity of the opening thereof.
  4. The system for height adjusting a seat backrest according to the preceding claim, characterized in that the sleeve (5) is fitted with two half-shells (6, 7) forming a bushing for guiding the arm (1) of the backrest, with the spring rod (13) being fastened to one (6) of these half-shells (6, 7).
  5. The system for height adjusting a seat backrest according to the preceding claim, characterized in that one (6) of the half-shells (6, 7) comprises a retractable finger (8) placed on an elastic tab (9), said finger (8) being insertable by elastic engagement into an orifice (10) of the sleeve (5).
  6. A method for mounting a backrest at the base of a seat comprising an adjusting system according to claims 1 to 5, comprising the following steps:
    - providing the base with a flexible member (13);
    - fitting the backrest with a retainer (4) for coupling with said member (13);
    - aligning the flexible member (13) with said retainer (4); and
    - sliding the backrest downward, by forcing the flexible member (13) in the retainer (4) in the direction of the axis A-A', at the notches (20) made in the side of each section of the zigzag oriented opposite the direction of displacement of the folded end of the rod.
EP07360027A 2007-06-20 2007-06-20 System for adjusting the height of a seat back Active EP2005861B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE602007014027T DE602007014027D1 (en) 2007-06-20 2007-06-20 System for height adjustment of the backrest of a chair
ES07360027T ES2363611T3 (en) 2007-06-20 2007-06-20 HEIGHT ADJUSTMENT SYSTEM FOR THE SUPPORT OF A SEAT.
AT07360027T ATE505977T1 (en) 2007-06-20 2007-06-20 SYSTEM FOR ADJUSTING THE HEIGHT OF THE BACKREST OF A CHAIR
EP07360027A EP2005861B1 (en) 2007-06-20 2007-06-20 System for adjusting the height of a seat back

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07360027A EP2005861B1 (en) 2007-06-20 2007-06-20 System for adjusting the height of a seat back

Publications (2)

Publication Number Publication Date
EP2005861A1 EP2005861A1 (en) 2008-12-24
EP2005861B1 true EP2005861B1 (en) 2011-04-20

Family

ID=38659653

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07360027A Active EP2005861B1 (en) 2007-06-20 2007-06-20 System for adjusting the height of a seat back

Country Status (4)

Country Link
EP (1) EP2005861B1 (en)
AT (1) ATE505977T1 (en)
DE (1) DE602007014027D1 (en)
ES (1) ES2363611T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9770111B2 (en) 2015-03-05 2017-09-26 A-Dec, Inc. Height adjusting mechanism and stool for dental practitioner
EP3311704A1 (en) * 2016-10-18 2018-04-25 Vitra Patente AG Backrest device
IT201700018727A1 (en) * 2017-02-20 2018-08-20 Linea Fabbrica S R L ADJUSTMENT DEVICE FOR THE HEIGHT OF A SEAT BACKREST, AND SITTING INCLUDING THIS DEVICE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH696482A5 (en) * 2000-03-29 2007-07-13 Stoll Giroflex Ag Apparatus for adjustment of a first component of a chair from a second component of a chair.
US6315362B1 (en) * 2001-05-18 2001-11-13 Yi Chun Enterprise Ltd. Height adjustment mechanism for chair backrest or arm
DE102005010533A1 (en) 2005-03-04 2006-09-07 Bock 1 Gmbh & Co. Kg Seating furniture, in particular office chair

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11602223B2 (en) 2019-02-21 2023-03-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11910934B2 (en) 2019-02-21 2024-02-27 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11786039B2 (en) 2019-12-13 2023-10-17 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11805913B2 (en) 2019-12-13 2023-11-07 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

Also Published As

Publication number Publication date
ATE505977T1 (en) 2011-05-15
ES2363611T3 (en) 2011-08-10
EP2005861A1 (en) 2008-12-24
DE602007014027D1 (en) 2011-06-01

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