FR2565476A3 - Synchronised adjustment device for chairs, in particular for office chairs - Google Patents

Synchronised adjustment device for chairs, in particular for office chairs Download PDF

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Publication number
FR2565476A3
FR2565476A3 FR8508115A FR8508115A FR2565476A3 FR 2565476 A3 FR2565476 A3 FR 2565476A3 FR 8508115 A FR8508115 A FR 8508115A FR 8508115 A FR8508115 A FR 8508115A FR 2565476 A3 FR2565476 A3 FR 2565476A3
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France
Prior art keywords
support
seat
backrest
pivot
link
Prior art date
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Granted
Application number
FR8508115A
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French (fr)
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FR2565476B3 (en
Inventor
Eckard Hansen
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Cofemo SpA
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Cofemo SpA
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Publication of FR2565476A3 publication Critical patent/FR2565476A3/en
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Publication of FR2565476B3 publication Critical patent/FR2565476B3/en
Expired legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity

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

Abstract

The invention relates to a synchronised adjustment device for chairs, comprising a seat support 10 and a backrest support 15 linked by an articulated pressure element 12, another link being provided by an additional element. The problem to be solved consists in avoiding the relative displacement between the bearing zones on the seat and on the backrest during adjustment. The device is characterised in that the additional element consists of an articulated rod 17 serving as control lever. The invention can be used in particular for office chairs, armchairs and the like.

Description

Dispositif de réglage synchronise pour sièges, notamment pour sièges de bureau.Synchronized adjustment device for seats, in particular for office seats.

L'invention a pour objet un dispositif de réglage synchronisé pour sièges, notarEntpour sièges de bureau, chaises, fauteuils et similaires, comportant un support d'assise monté mobile en rotation sur un tube porteur et réglable en hauteur, un élément de pression dont une ex trémite est montée pivotante sur le support tandis que son extrémité opposée est articulée au support du dossier, une autre liaison étant prévue entre ces supports, l'assise étant montée sur son support par sa partie antérieure tandis que sa partie postérieure est articulée sur le support du dossier. The subject of the invention is a synchronized adjustment device for seats, notarEnt for office seats, chairs, armchairs and the like, comprising a seat support mounted movably in rotation on a support tube and adjustable in height, a pressure element including a ex hopper is pivotally mounted on the support while its opposite end is articulated to the support of the backrest, another connection being provided between these supports, the seat being mounted on its support by its front part while its rear part is articulated on the file support.

Dans le domaine des sièges de bureau, on utilise l'expression "système synchronisé" pour désigner une combinaison du réglage de l'assise avec le réglage du dossier, dans un sens tel qu'un déplacement de l'assise soit suivi d'un déplacement du dossier. Dans une réalisation connue, le support de l'assise est directement articulé sur le dossier en un point donné, tandis que l'élément de pression tel que, par exemple, un ressort a gaz, est fixé en un point situé au dossier au dessous de celuici, le déplacement de cet élément étant a l'origine de la rotation du dossier autour du point àu l'assise est articulée au dossier. La partie antérieure de l'assise est fixée sur son support, tandis que la partie postérieure est reliée au dossier au moyen d'un second assemblage.Le déplacement de l'élément de pression et le déplacement correspondant du dossier provoquent exclusivement, par exemple, l'inclinaison en arrière du dossier tandis que la partie postérieure du l'assise s'abaisse, cette séquence étant dite synchronisée. In the field of office chairs, the expression "synchronized system" is used to designate a combination of the adjustment of the seat with the adjustment of the backrest, in a direction such that a displacement of the seat is followed by a moving the file. In a known embodiment, the seat support is directly articulated on the backrest at a given point, while the pressure element such as, for example, a gas spring, is fixed at a point located at the backrest below of this, the displacement of this element being at the origin of the rotation of the backrest around the point on which the seat is articulated to the backrest. The front part of the seat is fixed on its support, while the rear part is connected to the backrest by means of a second assembly. The displacement of the pressure element and the corresponding movement of the backrest exclusively cause, for example, the backward inclination of the backrest while the rear part of the seat lowers, this sequence being said to be synchronized.

Ce système présenté cependant un in convénient du fait qu'a la suite de la variation, et plus particulièrement de la croissance, de l'angle, due a la plus grande inclin aaon du dossier, il se produit également une augmentatìQn de la distance qui sépare le support de l'assisse du point d'appui. Etant donné que les sièges ainsi agencés permettent une modification continue du l'inclinaison du dossier, il se produit des déplacements continus entre le point d'appui sur l'assise et le point d'appui sur le dossier, ce qui fait que les vêtements de la personne assise subissent également des déplacements de façon continue.Ainsi, par exemple, ces déplacements continus peuvent faire sortir la chemise du pantalon, ce qui n'apparaît cèrtainement pas souhaitable en toutcas et plus particulièrem?nt dans une ambiance de travail. This system, however, presents a drawback of the fact that as a result of the variation, and more particularly of the growth, of the angle, due to the greater inclination of the backrest, there is also an increase in the distance which separates the support from the seat to the support point. Since the seats thus arranged allow a continuous modification of the inclination of the backrest, continuous movements occur between the fulcrum on the seat and the fulcrum on the backrest, which means that the clothes of the seated person also undergo movements continuously. Thus, for example, these continuous movements can cause the shirt to come out of the pants, which does not appear to be certainly desirable in any case and more particularly in a working atmosphere.

La cause de cet inconvénient réside uniquement dans l'accroissement progressif de la distance qui sépare la zone d'appui sur l'assise de la zone d'appui sur le dossier, accroissement qui est dû a son tour à ce que l'angle formé par les deux plans d'appui devient toujours plus grand. The cause of this drawback lies only in the progressive increase in the distance which separates the support area on the seat from the support area on the backrest, an increase which is in turn due to the fact that the angle formed by the two support planes becomes always larger.

Dans une réalisation connue, on a tenté de résoudre le problème en prévoyant un tirant fixé sur un coulisseau ayant pour but de déplacer le dossier vers le bas quand il s'incline en arrière. I1 est vrai qu'avec ce système il est possible d'éliminer l'inconvénient mentionné précédemment, mais il est vrai également qu'il entraîne une augmentation notable des dépenses de production. In a known embodiment, an attempt has been made to solve the problem by providing a tie-rod fixed on a slide having the aim of moving the backrest downwards when it tilts back. It is true that with this system it is possible to eliminate the drawback mentioned above, but it is also true that it results in a significant increase in production costs.

L'invention a pour but principal d'éliminer les inconvénients mentionnés précédemment en ce qui concerne les systèmes synchronisés, actuellement connus pour les sièges de bureau et similaires, prévus pour combiner le déplacement de l'assise avec celui du dossier. The main object of the invention is to eliminate the drawbacks mentioned above with regard to synchronized systems, currently known for office chairs and the like, designed to combine the movement of the seat with that of the backrest.

On se propose en particulier d'éviter un accroissement de la distance entre la zone d'appui sur l'assise et la zone d'appui sur le dossier.It is proposed in particular to avoid an increase in the distance between the support area on the seat and the support area on the backrest.

A cet effet, l'invention concerne un dispositif du type ci-dessus caractérisé en ce que ladite autre liaison entre le support d'assise et le support du dossier est assurée par un élément supplémentaire constitué par une biellette servant de levier de commande, une extrémité de cette biellette étant montée sur le support au moyen d'un pivot situé sensiblement sur l'axe de rotation du siège et au-dessus de l'élément de pression, tandis que son extrémité opposée est montée sur le support du dossier au moyen d'un pivot de l'élément de pression, l'assise étant montée sur le support du dossier au moyen d'un palier a pivot. To this end, the invention relates to a device of the above type characterized in that said other connection between the seat support and the support of the backrest is provided by an additional element constituted by a rod serving as a control lever, a end of this link being mounted on the support by means of a pivot located substantially on the axis of rotation of the seat and above the pressure element, while its opposite end is mounted on the support of the backrest by means a pivot of the pressure element, the seat being mounted on the back support by means of a pivot bearing.

L'invention est basée sur l'idée que le déplacement angulaire entre le dossier et le plan de l'assise, qui est normalement déterminé par l'action des mécanismes synchronisés considérés, doit être tel que l'arc parcouru par le dos de la personne assise soit identique à l'arc parcouru par le dossier lors de son inclinaison. Ce déplacement du dossier provoque en pratique une rotation presque coaxiale autour d'un axe imaginaire traversant le bassin de la personne assise. Ce n'est qu'ainsi qu'il est possible d'éviter la variation de la distance entre le dossier et l'assise.A cette fin, il est nécessaire que lors de l'abaissement de l'assise et de l'augmentation de l'inclinaison du dossier, il s'établisse une solidarisation presque rigide, sans variation de longueur, entre l'assise et le dossier, et que le point ou le dos de la personne assise s'appuie contre le dossier suive exactement le parcours du siège, sans qu'il y ait de déplacement relatif. The invention is based on the idea that the angular displacement between the backrest and the plane of the seat, which is normally determined by the action of the synchronized mechanisms considered, must be such that the arc traversed by the back of the seated person is identical to the arch traversed by the backrest during its inclination. This displacement of the backrest in practice causes an almost coaxial rotation around an imaginary axis crossing the pelvis of the seated person. It is only in this way that it is possible to avoid the variation of the distance between the backrest and the seat.To this end, it is necessary that when lowering the seat and increasing from the inclination of the backrest, an almost rigid connection is established, without variation in length, between the seat and the backrest, and whether the point or the back of the seated person presses against the backrest follows exactly the course of the seat, without there being relative displacement.

Dans les mécanismes proposés iusqu'à maintenant, le support du dossier est directement relié au support de l'assise par l'intermédiaire d'un joint d'articulation. I1 en résulte que l'inclinaison du dossier provoque une augmentation de l'angle formé entre l'assise et le dossier, l'arc correspondant étant plus grand que celui qu est parcouru par la personne assise. Au contraire, la présente invention comporte un élémentoscillant itnter- calé entre le support de l'assise et le support du dossier, élément grâce auquel on obtient une variation de l'inclinaison du dossier et un abaissement de l'assise avec un arc d'amplitude invariable. Ce résultat est dû au fait que cet élément supplémentaire règle le déplacement du dossier en fonction de l'abaissement de l'assise.Ainsi, il ne se produit plus de différence de déplacement exagérée entre le support du dossier et le support de l'assise. Le support du dossier est articulé sur l'assise au moyen d'un palier, aussi la cinématique du déplacement est directement con tôlée par l'assise. Si l'on supprime cette liaison, le dossier tombe en arrière et ne reste lié à l'assise que par l'intermédiaire de l'élément oscillant ajouté. Les mécanismes de réglage connus à l'heure actuelle fonctionnent au contraire même sans l'assise, le support du dossier étant doublement relié au support de l'assise, à savoir au moyen d'une articulation et au moyen de l'élément de pression. In the mechanisms proposed so far, the support for the backrest is directly connected to the support for the seat by means of an articulation joint. As a result, the inclination of the backrest increases the angle formed between the seat and the backrest, the corresponding arc being greater than that which the seated person traverses. On the contrary, the present invention comprises an oscillating element placed between the support of the seat and the support of the back, an element by which a variation in the inclination of the back is obtained and a lowering of the seat with an arc of invariable amplitude. This result is due to the fact that this additional element regulates the displacement of the backrest according to the lowering of the seat. Thus, there is no longer an exaggerated difference in displacement between the support of the backrest and the support of the seat. . The backrest support is articulated on the seat by means of a bearing, so the kinematics of the movement is directly controlled by the seat. If this link is removed, the backrest falls behind and remains linked to the seat only via the added oscillating element. The adjustment mechanisms known at present operate on the contrary even without the seat, the support of the backrest being doubly connected to the support of the seat, namely by means of an articulation and by means of the pressure element. .

Avec l'invention,on obtient deux mouvements de rotation différents mais se déroulant en même temps au moment du déplacement du dossier, ces mouvements se composant de manière telle que, par rapport à la personne assise, la distance entre l'assise et le dossier ne varie pas. With the invention, two different rotational movements are obtained but taking place at the same time when the backrest is moved, these movements being composed in such a way that, with respect to the seated person, the distance between the seat and the backrest does not vary.

Dans une forme de réalisation de l'invention,le pivot, par lequel la biellette est montée sur le support d'assise et qui est fixe vis-à-vis des déplacementsdu dossier, sert de premier pivot de rotation pour le support suivant un rayon rl correspondant à la longueur de la biellette, tandis que l'axe de pivotement qui sert au montage -de l'assise sur son support sert de second axe de rotation pour le support du dossier suivant un rayon r2 s'étendant entre l'axe de pivotement et le palier qui lie l'assise au support du dossier. In one embodiment of the invention, the pivot, by which the link is mounted on the seat support and which is fixed with respect to the movements of the backrest, serves as the first pivot for the support along a radius rl corresponding to the length of the link, while the pivot axis which is used for mounting the seat on its support serves as a second axis of rotation for the support of the backrest along a radius r2 extending between the axis pivot and the bearing which links the seat to the back support.

Selon d'autres caractéristiques de l'invention, préférentiellement, le rayon rl est égal à 7,6 cm environ et le rayon r2 est égal à 22,7 cm, quand l'élément à levier basculant a une longueur de 7,5 cm environ. According to other characteristics of the invention, preferably, the radius rl is equal to approximately 7.6 cm and the radius r2 is equal to 22.7 cm, when the rocking lever element has a length of 7.5 cm about.

Ces formes de réalisation permettent un perfectionnement notable de l'invention de nature à en optimiser le fonctionnement. These embodiments allow a significant improvement of the invention to optimize its operation.

En effectuant des modifications géométriques, il est évidemment possible d'obtenir d'autres effets du déplacement du dossier, en particulier lorsqu'on les prévoit dans le but d'adapter les sièges, chaises ou fauteuils, aux conditions posées par des personnes de stature différente. By making geometrical modifications, it is obviously possible to obtain other effects of the displacement of the backrest, in particular when they are provided for the purpose of adapting the seats, chairs or armchairs, to the conditions posed by people of stature different.

Un dispositif selon l'invention est représenté à titre d'exemple de réalisation non limitatif sur le dessin ci-joint, dans lequel la figure unique est une vue latérale schématique du dispositif. A device according to the invention is shown by way of nonlimiting exemplary embodiment in the attached drawing, in which the single figure is a schematic side view of the device.

La figure représente un siège 1 constitué par un ensemble d'assise 2 et un ensemble de dossier 3. Dans les sièges munis d'un dispositif de réglage synchronisé, une variation de l'inclinaison (flèche 4) est accompagnée d'un abaissement (flèche 6). Le déplacement du dossier s'étend normalement suivant un anglet41 sensible ment égal à 50 en avant et suivant un angle > 2 compris entre 150 et 200 environ en arrière. Une augmentation de l'inclinaison du dossier en arrière entraîne également une augmentation de l'anglet entre le plan de l'assise 16 et le plan du dossier 5. I1 en résulte que l'angle formé par le plan d'assise avec le plan d'appui sur le dossier augmente aussi. The figure shows a seat 1 consisting of a seat assembly 2 and a backrest assembly 3. In seats provided with a synchronized adjustment device, a variation in the inclination (arrow 4) is accompanied by a lowering ( arrow 6). The displacement of the backrest normally extends along an angle 41 substantially equal to 50 in front and at an angle> 2 of between 150 and 200 approximately in the rear. An increase in the inclination of the backrest backwards also results in an increase in the angle between the plane of the seat 16 and the plane of the backrest 5. It follows that the angle formed by the seat plane with the plane support on the backrest also increases.

Pour éviter l'augmentation, que l'on constate actuellement, de la distance entre le plan de l'assise 16 et la zone d'appui sur le dossier, il est pré vu un ensemble constitué par un support d'assise 10 monté a rotation autour d'un axe vertical 18 sur un tuBe porteur 11 et réglable en hauteur, ce support d'assise étant relié à un support de dossier 15 au moyen d'une biellette oscillante 17 servant de levier de commande.La liaison est prévue de manière que, par action d'un élément de pression 12 dont une extrémité 13 est montée pivotante sur le support 10 et l'extrémité opposée est articulée au support 15 du dossier, l'extrémité du support de dossier 15 effectue une rotation d'amplitude prédéterminée (arc dé cercle 22) autour d'un pivot 19 situé sensiblement sur l'axe de rotation 18 du siège et au dessus de l'élément de pression 12, de manière telle que ce déplacement du dossier corresponde à celui de la personne assise. A cette fin, une extrémité de la biellette 17 est montée à rotation autour du pivot 19 sur le support d'assise 10, tandis que son extrémité opposée est montée à rotation sur le support 15 autour du pivot 14 de l'élément de pression 12. To avoid the increase, which is currently observed, in the distance between the plane of the seat 16 and the bearing area on the backrest, an assembly consisting of a seat support 10 mounted has been provided. rotation about a vertical axis 18 on a carrier tuBe 11 and adjustable in height, this seat support being connected to a backrest support 15 by means of an oscillating link 17 serving as a control lever. so that, by the action of a pressure element 12 one end of which 13 is pivotally mounted on the support 10 and the opposite end is articulated to the support 15 of the backrest, the end of the backrest support 15 performs an amplitude rotation predetermined (circular arc 22) around a pivot 19 located substantially on the axis of rotation 18 of the seat and above the pressure element 12, so that this displacement of the back corresponds to that of the seated person . To this end, one end of the link 17 is rotatably mounted around the pivot 19 on the seat support 10, while its opposite end is rotatably mounted on the support 15 around the pivot 14 of the pressure element 12 .

Le support de dossier 15 est monté sur l'assise 16 au moyen d'un palier à pivot 21, tandis que la partie antérieure de l'assise 16 est montée sur le support correspondant 10 au moyen d'un élément à pivot 20.The back support 15 is mounted on the seat 16 by means of a pivot bearing 21, while the front part of the seat 16 is mounted on the corresponding support 10 by means of a pivot element 20.

Un déplacement en arrière dans la direction de la flèche 4 provoqué, par exemple, par le poids d'une personne, provoque le déplacement du piston dans le cylindre (flèche 23) et donc un double mouvement. Sous l'action de la biellette 17 qui accomplit un déplacement circulaire de rayon rl(correspondant à sa longueur)autour du pivot ou axe de pivotement 19 du support 10 de l'assise, le support du dossier s'abaisse dans la direction de la flèche 24.En même temps, l'assise 16 se déplace verS le bas dans la direction de la flèche 6 en tournant autour du pivot ou de l'axe de pivotement 20 avec un déplacement circulaire de rayon r2 entre ce pivot 20 et le palier 21 qui lie l'assise au support du dossier. I1 en résulte que le pivot 21 qui relie à articulation le support 15 du dossier à l'assise 16 à la partie postérieure de celle-ci s'abaisse jusqu'à ce que soit presque atteinte une position verticale,et que l'axe de pivotement 20 sert de second axe de rotation pour le support du dossier suivant le rayon r2. Par cette rotation d'accouplement, l'angle X formé entre le dossier et l'assise augmente, mais l'arc le long duquel se déplace le dos de la personne assise est identique à celui qui est parcouru par le dossier lorsque son inclinaison augmente.La disposition déterminante pour obtenir ce résultat est l'interposition de -la biellette 17 qui sert de levier de commande entre le support du dossier et l'assise, en supprimant ainsi la liaison directe entre ces deux pièces. A backward movement in the direction of arrow 4 caused, for example, by the weight of a person, causes the displacement of the piston in the cylinder (arrow 23) and therefore a double movement. Under the action of the link 17 which accomplishes a circular displacement of radius rl (corresponding to its length) around the pivot or pivot axis 19 of the support 10 of the seat, the support of the backrest lowers in the direction of the arrow 24.At the same time, the seat 16 moves down in the direction of arrow 6 by turning around the pivot or the pivot axis 20 with a circular movement of radius r2 between this pivot 20 and the bearing 21 which links the seat to the backrest support. I1 follows that the pivot 21 which connects to articulation the support 15 of the backrest to the seat 16 to the rear part of the latter lowers until a vertical position is almost reached, and the axis of pivot 20 serves as a second axis of rotation for supporting the backrest along radius r2. By this coupling rotation, the angle X formed between the backrest and the seat increases, but the arc along which the back of the seated person moves is identical to that which is traversed by the backrest when its inclination increases .The decisive arrangement to obtain this result is the interposition of the link 17 which serves as a control lever between the support of the backrest and the seat, thereby eliminating the direct connection between these two parts.

Dans la réalisation considérée, la distance rl est comprise entre 7 et 8 cm et par exemple de 7,6 cm. De même, la distance entre le pivot inférieur 14 et le pivot supérieur 21, est comprise entre 7 et 8 cm. La distance r2 qui sépare le point d'appui antérieur à l'endroit du pivot 20, du pivot 21, est de 23 cm environ,par exemple 22,7 cm. L'angle d'inclinaison oC3 entre l'horizontale et le support d'assise est égal à 200. L'angleoC4 entre la verticaleet la biellette inclinée 17 est égal à 700. Dans cette position, la distance entre le pivot su périeur 19 du support 10 et le pivot 21 du support 15 est égale à 6 cm environ. Les valeurs indiquées ci-dessus doivent être considérées comme indicatives et concernent une assise ayantune certaine profondeur, c'est-à-dire une assise pour laquelle il y a une certaine distance entre le sommet antérieur et le point d'appui sur le dossier. In the embodiment considered, the distance rl is between 7 and 8 cm and for example 7.6 cm. Likewise, the distance between the lower pivot 14 and the upper pivot 21 is between 7 and 8 cm. The distance r2 which separates the anterior support point at the location of the pivot 20, of the pivot 21, is approximately 23 cm, for example 22.7 cm. The angle of inclination oC3 between the horizontal and the seat support is equal to 200. The angleoC4 between the verticaland the inclined link 17 is equal to 700. In this position, the distance between the upper pivot 19 of the support 10 and the pivot 21 of support 15 is approximately 6 cm. The values indicated above should be considered as indicative and relate to a seat having a certain depth, that is to say a seat for which there is a certain distance between the anterior vertex and the point of support on the backrest.

Pour obtenir un effet de ressort déterminé, il est enfin prévu un ressort de torsion 25 s'appuyant sur une plage 26 prévue sur la biellette 17. La précontrainte de ce ressort peut être réglée au moyen d'une vis de réglage 27.  To obtain a determined spring effect, there is finally provided a torsion spring 25 resting on a range 26 provided on the link 17. The preload of this spring can be adjusted by means of an adjustment screw 27.

Claims (3)

REVENDICATIQNS 10) Dispositif de réglage synchronisé pour sièges, notamment pour sièges de bureau, chaises, fauteuils et similaires, comportant un support (10) d'assise monté mobile en rotation sur un tube porteur et réglable en hauteur, un élé- ment de pression (12) dont une extrémité (13) est montée pivotante sur le support S10) tandis que son extrémité opposée est articulée au support (15) du dossier, une autre liaison étant prévue entre ces supports, l'assise (16) étant montée sur son support (10) par sa partie antérieure tandis que sa partie postérieure est articulée sur le support (15) du dossier, caractérisé en ce que ladite autre liaison entre le support (10) d'assise et le support (15) du dossier est assurée par un élément supplémentaire constitué par une biellette (17) servant de levier de commande, une extrémité de cette biellette étant montée surale support (10) au moyen d'un pivot (193 situé sensiblement sur l'axe de rotation (18) du siège et au-dessus de l'élément de pression (12), tandis que son extrémité opposée est montée sur le support (15) du dossier au moyen d'un pivot (14) de l'élément de pression (12), l'assise (16) étant montée sur le support (15) du dossier au moyen d'un palier à pivot (21). 10) Synchronized adjustment device for seats, in particular for office seats, chairs, armchairs and the like, comprising a seat support (10) rotatably mounted on a support tube and adjustable in height, a pressure element ( 12) of which one end (13) is pivotally mounted on the support S10) while its opposite end is articulated to the support (15) of the backrest, another connection being provided between these supports, the seat (16) being mounted on its support (10) by its front part while its rear part is articulated on the support (15) of the backrest, characterized in that said other connection between the support (10) seat and the support (15) of the backrest is ensured by an additional element constituted by a link (17) serving as a control lever, one end of this link being mounted on the support (10) by means of a pivot (193 situated substantially on the axis of rotation (18) of the seat and above the pressure element (12), tand is that its opposite end is mounted on the support (15) of the backrest by means of a pivot (14) of the pressure element (12), the seat (16) being mounted on the support (15) of the backrest by means of a pivot bearing (21). 20) Dispositif selon la revendication 1, caractérisé en ce que le pivot (19), par lequel la biellette (17) est montée sur le support (10) d'assise et qui est fixe vis-b- vis des déplacements du dossier, sert de premier pivot de rotation pour le support (15) suivant un rayon r1 correspondant à la longueur de la biellette (17), tandis que l'axe de pivotement (20) qui sert au montage de l'assise (16) sur son support (10) sert de second axe de rotation pour le support (15) du dossier suivant un rayon r2 s'étendant entre l'axe de pivotement (20) et le palier (21) qui lie l'assise (16) au'sup- port (15) du dossier. 20) Device according to claim 1, characterized in that the pivot (19), by which the link (17) is mounted on the support (10) of the seat and which is fixed vis-a-vis the movements of the backrest, serves as the first pivot for the support (15) along a radius r1 corresponding to the length of the link (17), while the pivot axis (20) which is used to mount the seat (16) on its support (10) serves as a second axis of rotation for the support (15) of the backrest along a radius r2 extending between the pivot axis (20) and the bearing (21) which links the seat (16) to the support (15) of the file. 30) Dispositif selon la revendication 2, caractérisé en ce que le rayon r1 est égal à 7,6 cm environ et que le rayon r2 est égal à 22,7 cm environ, quand la biellette (17) a une longueur de 7,5 cm environ.  30) Device according to claim 2, characterized in that the radius r1 is equal to approximately 7.6 cm and that the radius r2 is equal to approximately 22.7 cm, when the link (17) has a length of 7.5 cm approx.
FR8508115A 1984-06-08 1985-05-30 SYNCHRONIZED ADJUSTING DEVICE FOR SEATS, IN PARTICULAR FOR OFFICE SEATS Expired FR2565476B3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE8417429U DE8417429U1 (en) 1984-06-08 1984-06-08 Point synchronous adjustment device for office chairs

Publications (2)

Publication Number Publication Date
FR2565476A3 true FR2565476A3 (en) 1985-12-13
FR2565476B3 FR2565476B3 (en) 1986-05-09

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Application Number Title Priority Date Filing Date
FR8508115A Expired FR2565476B3 (en) 1984-06-08 1985-05-30 SYNCHRONIZED ADJUSTING DEVICE FOR SEATS, IN PARTICULAR FOR OFFICE SEATS

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CH (1) CH666392A5 (en)
DE (2) DE8417429U1 (en)
ES (1) ES287247Y (en)
FR (1) FR2565476B3 (en)
IT (2) IT8507004V0 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH659179A5 (en) * 1983-05-06 1987-01-15 Provenda Marketing Ag Working chair, especially an office chair
DE3537203A1 (en) * 1984-10-24 1986-04-24 Klöber GmbH & Co, 7770 Überlingen Work chair with inclination mechanism for seat and back
DE3501910C2 (en) * 1984-10-25 1997-03-20 Sifa Sitzfabrik Gmbh Seat supports for chairs, in particular work swivel chairs
AU5061385A (en) * 1984-10-25 1986-05-15 Neumuller, K. Seat support for chairs, especially for rotating work-chairs
DE3616475C1 (en) * 1986-05-15 1987-06-11 Kusch Co Sitzmoebel Height-adjustable swivel chair equipped with gas pressure spring, in particular office chair or armchair
DE3619312C1 (en) * 1986-06-07 1988-01-14 Kusch Co Sitzmoebel Rocker mechanism for seating
DE3619928A1 (en) * 1986-06-13 1987-12-17 Hartmut S Engel Functional seating furniture
DE3630503A1 (en) * 1986-09-08 1988-03-10 Girsberger Holding Ag CHAIR
DE3700447A1 (en) * 1987-01-09 1988-07-21 Vogt Bueromoebel SEAT FURNITURE
EP0281845A1 (en) * 1987-02-25 1988-09-14 Köhl Gmbh Swivel chair or seat with synchronized inclination of backrest and seat
WO1992004844A1 (en) * 1990-09-14 1992-04-02 Karl Schreckenberg A chair
DE4219599C2 (en) * 1992-06-16 2002-08-01 Drabert Gmbh Synchronizing device for office chairs or the like
DE4303324A1 (en) * 1993-02-05 1994-08-11 Bock Martin Kunststoff Seating furniture, in particular office chair
NL9400407A (en) * 1994-03-15 1995-10-02 Backquality Europ Chair with a powered scissor mechanism.
DE10194640B4 (en) * 2000-10-16 2008-03-27 Kokuyo Co., Ltd. Chair that has a mechanism for supporting the seat part

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE926199C (en) 1950-11-14 1955-04-07 Weberei Muerrel G M B H Frame for upholstered seats, in which the backrest is pivotably arranged on the seat frame, is hinged against the base frame with torsion bar suspension
DE7501178U (en) 1974-01-18 1976-06-10 6331 Leun
DE2843058A1 (en) 1978-10-03 1980-04-24 Kloeber Kg Adjustment mechanism for reclining seats - includes height adjustment for backrest to reduce relative movement between seat and rest
AU541109B2 (en) * 1981-08-19 1984-12-13 Giroflex Entwicklungs Ag Chair
GB2125284B (en) * 1982-08-16 1985-08-07 Metalstand Co Adjustable chairs

Also Published As

Publication number Publication date
IT8507004V0 (en) 1985-05-29
DE8417429U1 (en) 1984-09-20
DE3520188A1 (en) 1985-12-12
FR2565476B3 (en) 1986-05-09
IT8505174A0 (en) 1985-05-29
ES287247U (en) 1985-12-01
DE3520188C2 (en) 1995-05-18
ES287247Y (en) 1986-07-01
IT1202272B (en) 1989-02-02
CH666392A5 (en) 1988-07-29

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