EP0796577A1 - Armchair with pivoting backrest - Google Patents

Armchair with pivoting backrest Download PDF

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Publication number
EP0796577A1
EP0796577A1 EP97420046A EP97420046A EP0796577A1 EP 0796577 A1 EP0796577 A1 EP 0796577A1 EP 97420046 A EP97420046 A EP 97420046A EP 97420046 A EP97420046 A EP 97420046A EP 0796577 A1 EP0796577 A1 EP 0796577A1
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EP
European Patent Office
Prior art keywords
backrest
seat
arms
armchair
chair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP97420046A
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German (de)
French (fr)
Inventor
Henri Massonnet
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Stamp SA
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Stamp SA
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Application filed by Stamp SA filed Critical Stamp SA
Publication of EP0796577A1 publication Critical patent/EP0796577A1/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
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C5/00—Chairs of special materials
    • A47C5/12—Chairs of special materials of plastics, with or without reinforcement

Definitions

  • the invention relates to an armchair. It relates in particular, but not exclusively, to a one-piece chair produced by injection molding of a plastic material such as polypropylene or equivalent.
  • the armchairs of the prior art thus produced are relatively rigid and their comfort is generally not excellent.
  • their backrest has no flexibility, so that prolonged station in a chair of this kind can be painful.
  • Patent application EP-A1-0 305 303 proposes to connect the backrest to rigid arms forming armrests by an elastic element while the backrest is elastic. This construction allows a certain angular movement of the upper part of the backrest, which improves the comfort of the chair thus obtained, but the lower part of the backrest which is connected to the seat of the chair cannot be moved and forms a rigid part against which bear the user's lumbar vertebrae.
  • patent application GB-A-2 282 755 discloses an armchair, the back of which is supported by two deformable arms. In the event of a violent effort on the backrest, the arms can be broken, which is dangerous and leads to the replacement of the chair.
  • the invention aims to solve these problems and proposes a armchair more comfortable and more resistant than those of the prior art.
  • the invention relates to an armchair comprising a seat and a back, said back being supported by two arms or armrests, fixed on the sides of said seat, and capable of deforming, in their zone of connection to said back, so that said backrest is capable of pivoting around a substantially horizontal axis, characterized in that it comprises posts for resuming the forces of said arms on said seat, said arms being provided at their lower edge with stiffening ribs which extend respectively by a stiffening rib of each of said force recovery posts.
  • the position of the backrest relative to the seat can be adapted by the user by a simple pressure exerted with his back on the backrest while the effort recovery posts contribute to the strength of the chair.
  • the angle of the backrest opening relative to the seat is increased.
  • the user leans forward while the lower back is pressing against the back of the chair this back pivots so that it remains in contact at least partially with the back of the user .
  • the stiffening ribs of the arms which extend towards the force recovery posts provide effective support for the backrest while allowing it to pivot about a substantially horizontal axis.
  • each arm or armrest located between the corresponding force recovery post and the back has a curved shape centered on the pivot axis. This shape provides a simple way to pivot the backrest around the axis.
  • stiffening rib of the lower edge of each arm can be extended by a stiffening rib formed on the lower edge of the backrest. This stiffening rib on the lower edge of the backrest prevents untimely deformation of the backrest in a direction perpendicular to its pivot axis.
  • each arm or armrest is provided, at its upper edge, with a stiffening rib.
  • the stiffening rib (s) may or may have come from the material with the arm, the armrest, the backrest or the post to which it (s) belongs or belong.
  • the invention can be used advantageously for the production of an armchair in which the arms, the backrest, the seat and the said rib (s) are molded in a piece of semi-rigid plastic material, that is to say say when the chair is in one piece.
  • the armchair 1 of FIG. 1 comprises a seat 2, supported by four legs 3, 4, 5 and 6, and a backrest 7 connected to the side of the seat 2 by two armrests 8 and 9, in the form of arms, fixed on the sides of the seat 2.
  • the backrest 7 is supported by the two arms 8 and 9, that is to say is not directly connected to the seat 2, and each arm or armrest is able to deform in its connection area, respectively 8a and 9a, in the backrest 7, so that the backrest is capable of pivoting about a substantially horizontal axis XX '.
  • the arms 8 and 9 are respectively supported by two posts 10 and 11, for taking up the forces, allowing the armrests 8 and 9 to support the file 7, without excessive deformation, over their entire length.
  • the posts 10 and 11 are integral with both the arms or armrests 8 and 9 and the seat 2.
  • the arms 8 and 9 are provided, at their respective lower edges 8b and 9b, with stiffening ribs 12 and 13 which are extend by a stiffening rib of each of the posts 10 and 11.
  • the chair 1 is made in a single piece of polypropylene or any other semi-rigid material having suitable mechanical properties.
  • the possibility of pivoting the backrest 7 makes the chair 1 particularly comfortable by allowing a user to obtain a desired angular position of the backrest 7 relative to the seat 2 by pressing more or less either on the upper part of the backrest 7 with its shoulders, either on its lower part with the lower back.
  • the extension of the ribs 12 and 13 by the rib 15 on the posts 10 and 11 gives the chair good mechanical stability, which increases its solidity and reduces the risk of the backrest oscillating 7.
  • the chair is shown in solid lines in its rest position, that is to say when the user exerts no effort on the backrest 7. If the user seated in the chair pushes the backrest 7 with its shoulders, it exerts a force represented by the arrow F which causes the backrest 7 to reach, by pivoting around the axis XX ', the position represented in dotted lines in which the value of the opening angle of the backrest relative to the seat, that is to say the angle defined between the backrest and the seat, has increased relative to its value in its rest position.
  • each arm or armrest, respectively 8 b and 9 b situated between the corresponding post 10 or 11 and the backrest 7 has a curved shape centered on the axis XX '.
  • the curved shape of the edges 8 b and 9 b allows the armrests 8 or 9 to be deformed in their connection area 8 a or 9 a .
  • the ribs 12 and 13 oppose this deformation, so that they give the connection between the armrests 8 and 9 and the backrest 7 sufficient stability avoiding oscillating movements in the backrest which would be unpleasant for the user. 'user.
  • the ribs 12 and 13 are extended by a rib 14 formed on the lower edge of the backrest 7, this rib giving the latter good rigidity in a direction perpendicular to its pivot axis XX '.
  • Each of the ribs 12, 13 and 14 is generally perpendicular to the main surface of the part of the chair to which it belongs, that is to say substantially horizontal, which allows it to fulfill its stiffening function.
  • each stiffening rib 12 and 13 is extended on the one hand by the stiffening rib 14 of the backrest and, on the other hand, by one of the stiffening ribs, for example 15, effort recovery posts 10 and 11. Thanks to these different stiffening ribs, the chair 1 of the invention has good mechanical stability properties.
  • each arm or armrest 8 and 9 is provided on its upper edge with a stiffening rib, respectively 16 and 17, extending in a substantially horizontal direction.
  • the function of these ribs 16 and 17 is threefold: they allow on the one hand to create a support surface for the elbows or forearms of the user sufficiently wide not to be uncomfortable; they also provide, in their portion adjacent connecting zones 8 and 9a, to resist pivotal movement of the back support 7 relative to the axis tending to oppose the deformation of arms 8 and 9; they finally make it possible to oppose the deformation of the arms 8 and 9 in a direction substantially parallel to the axis XX ', for example in the case where a user exerts on the arms 8 and 9 an effort tending to spread them apart. one of the other.
  • the stiffening ribs that the chair of the invention comprises extend from the arms or armrests of the backrest or posts outwards, so that they do not risk injuring a user who is sitting in the chair since it does not offer a sharp angle seen from the inside of the chair.
  • the production of the armchair of the invention is particularly easy since the armchair is made in one piece, the arms or armrests, the backrest, the seat, the ribs and the feet being injection molded. a semi-rigid plastic material.

Abstract

The chair is injection-moulded from a plastics and has a seat (2) and a back (7) which is supported by two arms or arm rests (8, 9) which are fixed to the edges of the seat. The seat back is connected to the arm rests by zones (8a, 9a) of reduced width which allow the back to pivot about a horizontal axis (X - X'). The rear ends of the arm rests are held up by supports (10, 11). The lower edges of the zones of reduced width have reinforcing ribs (12) which form extensions to a reinforcing rib (14) round the lower edge of the seat back. The upper edges of the arms also have reinforcing ribs (16, 17).

Description

L'invention a trait à un fauteuil. Elle concerne en particulier, mais non exclusivement, un fauteuil monobloc réalisé par moulage par injection d'un matériau plastique tel que du polypropylène ou équivalent.The invention relates to an armchair. It relates in particular, but not exclusively, to a one-piece chair produced by injection molding of a plastic material such as polypropylene or equivalent.

Les fauteuils de l'art antérieur ainsi fabriqués sont relativement rigides et leur confort n'est généralement pas excellent. En particulier, leur dossier ne présente aucune souplesse, si bien qu'une station prolongée dans un fauteuil de ce genre peut être pénible.The armchairs of the prior art thus produced are relatively rigid and their comfort is generally not excellent. In particular, their backrest has no flexibility, so that prolonged station in a chair of this kind can be painful.

La demande de brevet EP-A1-0 305 303 propose de relier le dossier à des bras rigides formant accoudoirs par un élément élastique alors que le dossier est élastique. Cette construction permet un certain débattement angulaire de la partie supérieure du dossier, ce qui améliore le confort du fauteuil ainsi obtenu, mais la partie inférieure du dossier qui est reliée à l'assise du fauteuil ne peut pas être déplacée et constitue une partie rigide contre laquelle viennent en appui les vertèbres lombaires de l'utilisateur.Patent application EP-A1-0 305 303 proposes to connect the backrest to rigid arms forming armrests by an elastic element while the backrest is elastic. This construction allows a certain angular movement of the upper part of the backrest, which improves the comfort of the chair thus obtained, but the lower part of the backrest which is connected to the seat of the chair cannot be moved and forms a rigid part against which bear the user's lumbar vertebrae.

D'autre part, on connaît, par le brevet américain US-A-4 131 315, un fauteuil dont les accoudoirs sont déformables et assurent la liaison entre le dossier et l'assise. Ces accoudoirs sont réunis de manière pivotante à l'assise et au dossier. Les accoudoirs constituent des pièces distinctes de l'assise et du dossier et doivent être reliés au moyen d'inserts à cette assise et à ce dossier, de sorte que le nombre de pièces utilisées pour la fabrication de ce siège est relativement important. En outre, la déformation des accoudoirs s'effectue dans le plan propre de ces derniers, si bien qu'elle est limitée. De plus, les mouvements du dossier du fauteuil divulgué par ce brevet influent sur la position de l'avant des accoudoirs par rapport à l'assise, ce qui peut être quelque peu surprenant pour l'utilisateur.On the other hand, we know, from American patent US-A-4 131 315, an armchair whose armrests are deformable and provide the connection between the backrest and the seat. These armrests are pivotally joined to the seat and the backrest. The armrests are separate parts of the seat and the backrest and must be connected by means of inserts to this seat and to this backrest, so that the number of parts used for the manufacture of this seat is relatively large. In addition, the armrests are deformed in the plane of the latter, so that it is limited. In addition, the movements of the back of the chair disclosed by this patent influence the position of the front of the armrests relative to the seat, which may be somewhat surprising for the user.

Enfin, la demande de brevet GB-A-2 282 755 divulgue un fauteuil dont le dossier est supporté par deux bras déformables. En cas d'effort violent sur le dossier, les bras peuvent être rompus ce qui s'avère dangereux et conduit au remplacement du fauteuil.Finally, patent application GB-A-2 282 755 discloses an armchair, the back of which is supported by two deformable arms. In the event of a violent effort on the backrest, the arms can be broken, which is dangerous and leads to the replacement of the chair.

L'invention vise à résoudre ces problèmes et propose un fauteuil plus confortable et plus résistant que ceux de l'art antérieur.The invention aims to solve these problems and proposes a armchair more comfortable and more resistant than those of the prior art.

Dans cet esprit, l'invention concerne un fauteuil comprenant une assise et un dossier, ledit dossier étant supporté par deux bras ou accoudoirs, fixés sur les côtés de ladite assise, et aptes à se déformer, dans leur zone de raccordement audit dossier, de sorte que ledit dossier est susceptible de pivoter autour d'un axe sensiblement horizontal, caractérisé en ce qu'il comprend des poteaux de reprise des efforts desdits bras sur ladite assise, lesdits bras étant pourvus à leur bord inférieur de nervures de rigidification qui se prolongent respectivement par une nervure de rigidification de chacun desdits poteaux de reprise d'effort.In this spirit, the invention relates to an armchair comprising a seat and a back, said back being supported by two arms or armrests, fixed on the sides of said seat, and capable of deforming, in their zone of connection to said back, so that said backrest is capable of pivoting around a substantially horizontal axis, characterized in that it comprises posts for resuming the forces of said arms on said seat, said arms being provided at their lower edge with stiffening ribs which extend respectively by a stiffening rib of each of said force recovery posts.

Grâce à l'invention, la position du dossier par rapport à l'assise peut être adaptée par l'utilisateur par une simple pression exercée avec son dos sur le dossier alors que les poteaux de reprise d'effort contribuent à la solidité du fauteuil. En particulier, si l'utilisateur appuie sur le dossier avec ses épaules, l'angle d'ouverture du dossier par rapport à l'assise est augmenté. D'autre part, si l'utilisateur se penche en avant alors que le bas de son dos est en appui contre le dossier du fauteuil, ce dossier pivote de sorte qu'il reste en contact au moins partiellement avec le dos de l'utilisateur. Les nervures de rigidification des bras qui se prolongent vers les poteaux de reprise d'effort assurent un soutien efficace du dossier tout en permettant son pivotement autour d'un axe sensiblement horizontal.Thanks to the invention, the position of the backrest relative to the seat can be adapted by the user by a simple pressure exerted with his back on the backrest while the effort recovery posts contribute to the strength of the chair. In particular, if the user presses on the backrest with his shoulders, the angle of the backrest opening relative to the seat is increased. On the other hand, if the user leans forward while the lower back is pressing against the back of the chair, this back pivots so that it remains in contact at least partially with the back of the user . The stiffening ribs of the arms which extend towards the force recovery posts provide effective support for the backrest while allowing it to pivot about a substantially horizontal axis.

Selon un premier aspect avantageux de l'invention, le bord inférieur de chaque bras ou accoudoir situé entre le poteau de reprise d'effort correspondant et le dossier présente une forme courbe centrée sur l'axe de pivotement. Cette forme permet d'obtenir de façon simple le pivotement du dossier autour de l'axe.According to a first advantageous aspect of the invention, the lower edge of each arm or armrest located between the corresponding force recovery post and the back has a curved shape centered on the pivot axis. This shape provides a simple way to pivot the backrest around the axis.

On peut en outre prévoir que la nervure de rigidification du bord inférieur de chaque bras peut se prolonger par une nervure de rigidification formée sur le bord inférieur du dossier. Cette nervure de rigidification du bord inférieur du dossier évite des déformations intempestives du dossier dans une direction perpendiculaire à son axe de pivotement.It can also be provided that the stiffening rib of the lower edge of each arm can be extended by a stiffening rib formed on the lower edge of the backrest. This stiffening rib on the lower edge of the backrest prevents untimely deformation of the backrest in a direction perpendicular to its pivot axis.

Selon un autre aspect avantageux de l'invention, il est possible de prévoir que chaque bras ou accoudoir est muni, à son bord supérieur, d'une nervure de rigidification.According to another advantageous aspect of the invention, it is possible to provide that each arm or armrest is provided, at its upper edge, with a stiffening rib.

Dans tous les cas, la ou les nervure(s) de rigidification peut ou peuvent être venue(s) de matière avec le bras, l'accoudoir, le dossier ou le poteau auquel elle(s) appartient ou appartiennent.In all cases, the stiffening rib (s) may or may have come from the material with the arm, the armrest, the backrest or the post to which it (s) belongs or belong.

L'invention peut être utilisée de manière avantageuse pour la réalisation d'un fauteuil dans lequel les bras, le dossier, l'assise et la ou lesdites nervures sont moulées en une pièce de matériau plastique semi-rigide, c'est-à-dire lorsque le fauteuil est monobloc.The invention can be used advantageously for the production of an armchair in which the arms, the backrest, the seat and the said rib (s) are molded in a piece of semi-rigid plastic material, that is to say say when the chair is in one piece.

L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un mode de réalisation d'un fauteuil conforme à son principe donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels :

  • La figure 1 est une vue en perspective de côté d'un fauteuil conforme à l'invention ;
  • la figure 2 est une vue en perspective de dos du fauteuil de la figure 1 et
  • la figure 3 est une vue schématique de côté du fauteuil des figures 1 et 2.
The invention will be better understood and other advantages of it will appear more clearly in the light of the following description of an embodiment of an armchair in accordance with its principle given solely by way of example and made with reference to the accompanying drawings in which:
  • Figure 1 is a side perspective view of an armchair according to the invention;
  • Figure 2 is a perspective rear view of the chair of Figure 1 and
  • FIG. 3 is a schematic side view of the chair of FIGS. 1 and 2.

Le fauteuil 1 de la figure 1 comprend une assise 2, supportée par quatre pieds 3, 4, 5 et 6, et un dossier 7 relié au côté de l'assise 2 par deux accoudoirs 8 et 9, en forme de bras, fixés sur les côtés de l'assise 2.The armchair 1 of FIG. 1 comprises a seat 2, supported by four legs 3, 4, 5 and 6, and a backrest 7 connected to the side of the seat 2 by two armrests 8 and 9, in the form of arms, fixed on the sides of the seat 2.

Le dossier 7 est supporté par les deux bras 8 et 9, c'est-à-dire n'est pas directement relié à l'assise 2, et chaque bras ou accoudoir est apte à se déformer dans sa zone de raccordement, respectivement 8a et 9a, au dossier 7, de sorte que le dossier est susceptible de pivoter autour d'un axe sensiblement horizontal XX'.The backrest 7 is supported by the two arms 8 and 9, that is to say is not directly connected to the seat 2, and each arm or armrest is able to deform in its connection area, respectively 8a and 9a, in the backrest 7, so that the backrest is capable of pivoting about a substantially horizontal axis XX '.

Conformément à l'invention, les bras 8 et 9 sont respectivement supportés par deux poteaux 10 et 11, de reprise des efforts, permettant aux accoudoirs 8 et 9 de supporter le dossier 7, sans déformation excessive, sur la totalité de leur longueur. Les poteaux 10 et 11 sont solidaires à la fois des bras ou accoudoirs 8 et 9 et de l'assise 2. Les bras 8 et 9 sont pourvus, à leurs bords inférieurs respectifs 8b et 9b, de nervures de rigidification 12 et 13 qui se prolongent par une nervure de rigidification de chacun des poteaux 10 et 11.According to the invention, the arms 8 and 9 are respectively supported by two posts 10 and 11, for taking up the forces, allowing the armrests 8 and 9 to support the file 7, without excessive deformation, over their entire length. The posts 10 and 11 are integral with both the arms or armrests 8 and 9 and the seat 2. The arms 8 and 9 are provided, at their respective lower edges 8b and 9b, with stiffening ribs 12 and 13 which are extend by a stiffening rib of each of the posts 10 and 11.

Le fauteuil 1 est réalisé dans une pièce monobloc en polypropylène ou en tout autre matériau semi-rigide présentant des propriétés mécaniques adaptées.The chair 1 is made in a single piece of polypropylene or any other semi-rigid material having suitable mechanical properties.

La possibilité de pivotement du dossier 7 rend le fauteuil 1 particulièrement confortable en permettant à un utilisateur d'obtenir une position angulaire souhaitée du dossier 7 par rapport à l'assise 2 en appuyant plus ou moins soit sur la partie supérieure du dossier 7 avec ses épaules, soit sur sa partie inférieure avec le bas de son dos. D'autre part, le prolongement des nervures 12 et 13 par la nervure 15 sur les poteaux 10 et 11 confère au fauteuil une bonne stabilité mécanique, ce qui augmente sa solidité et diminue les risques d'oscillations du dossier 7.The possibility of pivoting the backrest 7 makes the chair 1 particularly comfortable by allowing a user to obtain a desired angular position of the backrest 7 relative to the seat 2 by pressing more or less either on the upper part of the backrest 7 with its shoulders, either on its lower part with the lower back. On the other hand, the extension of the ribs 12 and 13 by the rib 15 on the posts 10 and 11 gives the chair good mechanical stability, which increases its solidity and reduces the risk of the backrest oscillating 7.

A la figure 3, le fauteuil est représenté en traits pleins dans sa position de repos, c'est-à-dire lorsque l'utilisateur n'exerce pas d'effort sur le dossier 7. Si l'utilisateur assis dans le fauteuil pousse le dossier 7 avec ses épaules, il exerce une force représentée par la flèche F qui fait atteindre au dossier 7, par pivotement autour de l'axe XX', la position représentée en traits pointillés dans laquelle la valeur de l'angle d'ouverture du dossier par rapport à l'assise, c'est-à-dire l'angle défini entre le dossier et l'assise, a augmenté par rapport à sa valeur dans sa position de repos. Si, au contraire, l'utilisateur repousse la partie inférieure du dossier 7 en exerçant une force représentée par la flèche F', par exemple en se "calant" au fond du fauteuil, la position du dossier s'adapte pour devenir celle qui est rerésentée en traits mixtes. Ce déplacement du dossier 7 entre les trois positions représentées à la figure 3 est obtenu grâce au fait que les bras ou accoudoirs 8 et 9 peuvent se déformer dans leur zone de raccordement au dossier, cette zone étant située sensiblement au-dessus de l'axe XX', au delà des poteaux 10 et 11.In Figure 3, the chair is shown in solid lines in its rest position, that is to say when the user exerts no effort on the backrest 7. If the user seated in the chair pushes the backrest 7 with its shoulders, it exerts a force represented by the arrow F which causes the backrest 7 to reach, by pivoting around the axis XX ', the position represented in dotted lines in which the value of the opening angle of the backrest relative to the seat, that is to say the angle defined between the backrest and the seat, has increased relative to its value in its rest position. If, on the contrary, the user pushes the lower part of the backrest 7 by exerting a force represented by the arrow F ', for example by "wedging" at the bottom of the chair, the position of the backrest adapts to become that which is represented in mixed lines. This movement of the backrest 7 between the three positions shown in Figure 3 is obtained by the fact that the arms or armrests 8 and 9 can deform in their area of connection to the backrest, this area being located substantially above the axis XX ', beyond posts 10 and 11.

Conformément à un aspect avantageux de l'invention, le bord inférieur de chaque bras ou accoudoir, respectivement 8b et 9b, situé entre le poteau 10 ou 11 correspondant et le dossier 7 présente une forme courbe centrée sur l'axe XX'. La forme courbe des bords 8b et 9b permet la déformation des accoudoirs 8 ou 9 dans leur zone de raccordement 8a ou 9a. Au contraire, les nervures 12 et 13 s'opposent à cette déformation, de sorte qu'elles confèrent à la liaison entre les accoudoirs 8 et 9 et le dossier 7 une stabilité suffisante évitant au dossier des mouvements d'oscillation qui seraient désagréables pour l'utilisateur.According to an advantageous aspect of the invention, the lower edge of each arm or armrest, respectively 8 b and 9 b , situated between the corresponding post 10 or 11 and the backrest 7 has a curved shape centered on the axis XX '. The curved shape of the edges 8 b and 9 b allows the armrests 8 or 9 to be deformed in their connection area 8 a or 9 a . On the contrary, the ribs 12 and 13 oppose this deformation, so that they give the connection between the armrests 8 and 9 and the backrest 7 sufficient stability avoiding oscillating movements in the backrest which would be unpleasant for the user. 'user.

D'autre part, comme il apparaît plus clairement à la figure 2, les nervures 12 et 13 se prolongent par une nervure 14 formée sur le bord inférieur du dossier 7, cette nervure conférant à celui-ci une bonne rigidité dans une direction perpendiculaire à son axe de pivotement XX'. Chacune des nervure 12, 13 et 14 est globalement perpendiculaire à la surface principale de la partie du fauteuil à laquelle elle appartient, c'est-à-dire sensiblement horizontale, ce qui lui permet de remplir sa fonction de rigidification.On the other hand, as it appears more clearly in FIG. 2, the ribs 12 and 13 are extended by a rib 14 formed on the lower edge of the backrest 7, this rib giving the latter good rigidity in a direction perpendicular to its pivot axis XX '. Each of the ribs 12, 13 and 14 is generally perpendicular to the main surface of the part of the chair to which it belongs, that is to say substantially horizontal, which allows it to fulfill its stiffening function.

En résumé et comme il apparaît clairement sur les dessins, chaque nervure de rigidification 12 et 13 se prolonge d'une part par la nervure de rigidification 14 du dossier et, d'autre part, par l'une des nervures de rigidification, par exemple 15, des poteaux de reprise d'efforts 10 et 11. Grâce à ces différentes nervures de rigidification, le fauteuil 1 de l'invention présente de bonnes propriétés de stabilité mécanique.In summary and as it appears clearly on the drawings, each stiffening rib 12 and 13 is extended on the one hand by the stiffening rib 14 of the backrest and, on the other hand, by one of the stiffening ribs, for example 15, effort recovery posts 10 and 11. Thanks to these different stiffening ribs, the chair 1 of the invention has good mechanical stability properties.

Selon un autre aspect avantageux de l'invention, chaque bras ou accoudoir 8 et 9 est muni sur son bord supérieur d'une nervure de rigidification, respectivement 16 et 17, s'étendant dans une direction sensiblement horizontale. La fonction de ces nervures 16 et 17 est triple : elles permettent d'une part de créer une surface d'appui des coudes ou des avant-bras de l'utilisateur suffisamment large pour ne pas être inconfortable ; elles permettent aussi, dans leur partie voisine des zones de raccordement 8a et 9a, de résister au mouvement de pivotement du dossier 7 par rapport à l'axe en tendant à s'opposer à la déformation des bras 8 et 9 ; elles permettent enfin de s'opposer à la déformation des bras 8 et 9 dans une direction sensiblement parallèle à l'axe XX', par exemple dans le cas où un utilisateur exercerait sur les bras 8 et 9 un effort tendant à les écarter l'un de l'autre.According to another advantageous aspect of the invention, each arm or armrest 8 and 9 is provided on its upper edge with a stiffening rib, respectively 16 and 17, extending in a substantially horizontal direction. The function of these ribs 16 and 17 is threefold: they allow on the one hand to create a support surface for the elbows or forearms of the user sufficiently wide not to be uncomfortable; they also provide, in their portion adjacent connecting zones 8 and 9a, to resist pivotal movement of the back support 7 relative to the axis tending to oppose the deformation of arms 8 and 9; they finally make it possible to oppose the deformation of the arms 8 and 9 in a direction substantially parallel to the axis XX ', for example in the case where a user exerts on the arms 8 and 9 an effort tending to spread them apart. one of the other.

Dans tous les cas, les nervures de rigidification que comprend le fauteuil de l'invention s'étendent à partir des bras ou accoudoirs du dossier ou des poteaux vers l'extérieur, de sorte qu'elles ne risquent pas de blesser un utilisateur se trouvant assis dans le fauteuil puisque celui-ci n'offre pas d'angle vif vu de l'intérieur du fauteuil.In all cases, the stiffening ribs that the chair of the invention comprises extend from the arms or armrests of the backrest or posts outwards, so that they do not risk injuring a user who is sitting in the chair since it does not offer a sharp angle seen from the inside of the chair.

Enfin, on peut noter que la production du fauteuil de l'invention est particulièrement aisée puisque le fauteuil est réalisé en une seule pièce, les bras ou accoudoirs, le dossier, l'assise, les nervures et les pieds étant moulés par injection d'un matériau plastique semi-rigide.Finally, it can be noted that the production of the armchair of the invention is particularly easy since the armchair is made in one piece, the arms or armrests, the backrest, the seat, the ribs and the feet being injection molded. a semi-rigid plastic material.

Claims (8)

Fauteuil (1) comprenant une assise (2) et un dossier (7), ledit dossier étant supporté par deux bras ou accoudoirs (8, 9), fixés sur les côtés de ladite assise, et aptes à se déformer, dans leur zone de raccordement (8a, 9a) audit dossier, de sorte que ledit dossier est susceptible de pivoter autour d'un axe sensiblement horizontal (XX'), caractérisé en ce qu'il comprend des poteaux (10, 11) de reprise des efforts desdits bras sur ladite assise, lesdits bras étant pourvus à leur bord inférieur (8b, 9b) de nervures de rigidification (12, 13) qui se prolongent respectivement par une nervure (15) de rigidification de chacun desdits poteaux de reprise d'effort.Armchair (1) comprising a seat (2) and a backrest (7), said backrest being supported by two arms or armrests (8, 9), fixed on the sides of said seat, and capable of deforming, in their area of connection (8, 9a) to said folder, so that said backrest is pivotable about a substantially horizontal axis (XX '), characterized in that it comprises posts (10, 11) for absorbing forces of said arms on said seat, said arms being provided at their lower edge ( 8b , 9b ) with stiffening ribs (12, 13) which are respectively extended by a rib (15) for stiffening each of said recovery pipes effort. Fauteuil (1) selon la revendication 1, caractérisé en ce que le bord inférieur (8b, 9b) de chaque bras ou accoudoir (8, 9) situé entre le poteau (10, 11) de reprise d'effort correspondant et ledit dossier (7) présente une forme courbe centrée sur ledit axe (XX') de pivotement.Chair (1) according to claim 1, characterized in that the lower edge ( 8b , 9b ) of each arm or armrest (8, 9) located between the post (10, 11) of corresponding force recovery and said backrest (7) has a curved shape centered on said pivot axis (XX '). Fauteuil (1) selon la revendication 1, caractérisé en ce que lesdites nervures de rigidification (12, 13) se prolongent par une nervure de rigidification (14) formée sur le bord inférieur dudit dossier (7).Chair (1) according to claim 1, characterized in that said stiffening ribs (12, 13) are extended by a stiffening rib (14) formed on the lower edge of said backrest (7). Fauteuil (1) selon la revendication 1, caractérisé en ce que chaque bras ou accoudoir (8, 9) est muni, à son bord supérieur, d'une nervure de rigidification (16, 17).Armchair (1) according to claim 1, characterized in that each arm or armrest (8, 9) is provided, at its upper edge, with a stiffening rib (16, 17). Fauteuil (1) selon l'une des revendications 1 à 4, caractérisé en ce que ladite ou lesdites nervures de rigidification (12-17) est ou sont venue(s) de matière avec ledit bras ou accoudoir et/ou ledit dossier et/ou ledit poteau.Armchair (1) according to one of claims 1 to 4, characterized in that said stiffening rib (s) (12-17) is or have come (s) in one piece with said arm or armrest and / or said backrest and / or said post. Fauteuil (1) selon l'une des revendications 1 à 5, caractérisé en ce que ladite ou lesdites nervures de rigidification (12-14, 16, 17) s'étendent dans une direction sensiblement horizontale.Chair (1) according to one of claims 1 to 5, characterized in that said one or more stiffening ribs (12-14, 16, 17) extend in a substantially horizontal direction. Fauteuil (1) selon l'une des revendications 1 à 6, caractérisé en ce que ladite ou lesdites nervures de rigidification (12-17) s'étendent à partir dudit bras ou accoudoir, dudit dossier ou dudit poteau, vers l'extérieur.Armchair (1) according to one of claims 1 to 6, characterized in that said one or more stiffening ribs (12-17) extend from said arm or armrest, said backrest or said post, towards the outside. Fauteuil (1) selon l'une des revendications 1 à 7, caractérisé en ce que lesdits bras ou accoudoirs (8, 9), ledit dossier (7), ladite assise (2), lesdits poteaux (10, 11) et ladite ou lesdites nervures (12-17) sont moulés en une pièce de matériau plastique semi-rigide.Armchair (1) according to one of claims 1 to 7, characterized in that said arms or armrests (8, 9), said backrest (7), said seat (2), said posts (10, 11) and said or said ribs (12-17) are molded in a piece of semi-rigid plastic material.
EP97420046A 1996-03-19 1997-03-19 Armchair with pivoting backrest Withdrawn EP0796577A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9603644A FR2746279B1 (en) 1996-03-19 1996-03-19 SWIVEL ARMCHAIR
FR9603644 1996-03-19

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EP0796577A1 true EP0796577A1 (en) 1997-09-24

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Cited By (3)

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EP1839532A1 (en) * 2006-03-28 2007-10-03 Kokuyo Furniture Co., Ltd. Chair
WO2009144703A1 (en) * 2008-04-14 2009-12-03 Keter Plastic Ltd. An artificial panel, a method for manufacturing same and furniture articles therefrom
US20220248853A1 (en) * 2019-06-11 2022-08-11 Herman Miller, Inc. Chair

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DE2535911A1 (en) * 1975-08-12 1977-02-24 Pag Presswerk Ag Plastic framed stacking chair - is assembled from four piece profiled plastic frame and plastic seat
GB2282755A (en) * 1993-10-13 1995-04-19 Westinghouse Electric Corp Single piece chair shell

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2535911A1 (en) * 1975-08-12 1977-02-24 Pag Presswerk Ag Plastic framed stacking chair - is assembled from four piece profiled plastic frame and plastic seat
GB2282755A (en) * 1993-10-13 1995-04-19 Westinghouse Electric Corp Single piece chair shell

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1839532A1 (en) * 2006-03-28 2007-10-03 Kokuyo Furniture Co., Ltd. Chair
US7654616B2 (en) 2006-03-28 2010-02-02 Kokuyo Furniture Co., Ltd. Chair having integrally formed back frame and seat frame
WO2009144703A1 (en) * 2008-04-14 2009-12-03 Keter Plastic Ltd. An artificial panel, a method for manufacturing same and furniture articles therefrom
CN102083609A (en) * 2008-04-14 2011-06-01 凯特尔塑料有限公司 An artificial panel, a method for manufacturing same and furniture articles therefrom
US9820574B2 (en) 2008-04-14 2017-11-21 Keter Plastic Ltd. Artificial panel, a method for manufacturing same and furniture articles therefrom
US10561243B2 (en) 2008-04-14 2020-02-18 Keter Plastic Ltd. Artificial panel, a method for manufacturing same and furniture articles therefrom
US10617210B2 (en) 2008-04-14 2020-04-14 Keter Plastic Ltd. Artificial panel, a method for manufacturing same and furniture articles therefrom
US10709243B2 (en) 2008-04-14 2020-07-14 Keter Plastic Ltd. Artificial panel, a method for manufacturing same and furniture articles therefrom
US20220248853A1 (en) * 2019-06-11 2022-08-11 Herman Miller, Inc. Chair

Also Published As

Publication number Publication date
FR2746279B1 (en) 1998-05-07
FR2746279A1 (en) 1997-09-26

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