EP0399893A1 - Synchronous adjustment device for the inclination of the backrest and seat of an arm-chair - Google Patents

Synchronous adjustment device for the inclination of the backrest and seat of an arm-chair Download PDF

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Publication number
EP0399893A1
EP0399893A1 EP90401356A EP90401356A EP0399893A1 EP 0399893 A1 EP0399893 A1 EP 0399893A1 EP 90401356 A EP90401356 A EP 90401356A EP 90401356 A EP90401356 A EP 90401356A EP 0399893 A1 EP0399893 A1 EP 0399893A1
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EP
European Patent Office
Prior art keywords
backrest
base
seat
articulation
geometric axis
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.)
Withdrawn
Application number
EP90401356A
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German (de)
French (fr)
Inventor
Jean-Paul Gérard Guichon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Grosfillex SAS
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Grosfillex SAS
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Filing date
Publication date
Application filed by Grosfillex SAS filed Critical Grosfillex SAS
Publication of EP0399893A1 publication Critical patent/EP0399893A1/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
    • A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/04—Folding chairs with inflexible seats
    • A47C4/08—Folding chairs with inflexible seats having a frame made of wood or plastics
    • A47C4/10—Folding chairs with inflexible seats having a frame made of wood or plastics with legs pivotably connected to seat or underframe
    • A47C4/14—Folding chairs with inflexible seats having a frame made of wood or plastics with legs pivotably connected to seat or underframe with cross legs
    • A47C4/16—Folding chairs with inflexible seats having a frame made of wood or plastics with legs pivotably connected to seat or underframe with cross legs of adjustable type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
    • A47C1/03244—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism positioned under the arm-rests
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/04—Folding chairs with inflexible seats

Definitions

  • the present invention relates to an improved device for tilting, in an adjustable and combined manner, the backrest and the seat of an armchair which are hinged together and on the base of this armchair, the armrests of which are articulated on the backrest and connected to the base by l 'through racks.
  • the seated person To modify the backrest tilt setting, the seated person must lean forward, on the one hand, to unlock the racks and, on the other hand, to move the backrest without losing balance and tilting backward.
  • the object of the present invention is to remedy these drawbacks while retaining the advantage of the aforementioned known device, by means of which any mobile mounting of the front joints can be eliminated.
  • the geometric axis of articulation of the backrest on the seat is placed in front of the geometric axis of articulation of the backrest on the base, and located, when the backrest is in the fully raised position. and in the completely lowered position, below and respectively above the horizontal passing through this geometric axis of articulation of the backrest on the base.
  • the extreme positions of the geometric axis of articulation of the backrest on the seat are substantially symmetrical with respect to the horizontal passing through the geometric axis of articulation of the backrest on the base.
  • This improved device of the invention can be applied to the V-shaped base of the folding chair illustrated by the aforementioned French patent No. 2,596,261, which base, on each side, comprises a front foot and a rear foot, the upper ends of which are articulated one on the other and provided with a finger cooperating with the rack of the corresponding armrest.
  • the axes of articulation of the seat and the back are carried respectively by these front feet and these rear feet, while the axes of articulation of the seat on the back are located in front of the axes of articulation of the backrest on the hind feet.
  • the improved device of the invention can also be applied to the rigid base of an armchair, a base which consists of two lateral arches, each of which comprises a branch or front leg and a branch or rear leg connected by a cross member of medium level and making body with an upper middle bend fitted with the finger cooperating with the rack of the corresponding armrest.
  • the axes of articulation of the seat and the back are carried respectively by the front legs and the crosspieces, while the axes of articulation of the seat on the back are located in front of the axes of articulation of the file on the sleepers.
  • the improved device according to the invention can also be applied to other types of plastic armchair, for example to those comprising a folding frame in X, provided, however, that at least one additional part, such as a link, is provided and suitably arranged.
  • Figure 1 shows a folding chair with a V-shaped base, the seat and back of which are adjustable in inclination.
  • the chair is made of injection molded plastic.
  • this chair has a normal seating level and the adjustments allow the occupant to be more or less leaning back.
  • the armchair comprises a backrest 1 and a seat 2 having lateral ears 3, 4 respectively, two of which are integral with aligned pins 5 which pass through holes made in the two ears, in order to constitute articulations situated at the bottom of the backrest and at the back of the seat.
  • the chair also has a base 6 consisting of two front lateral legs 7 joined together by means of a low cross member 8 and by two rear lateral legs 9 also joined together by means of a lower crosspiece 10. On each side, the front 7 and rear 9 feet are connected, at their upper end, by a hinge pin or pin 11.
  • the seat 2 is supported at the front by the front legs 7 by means of aligned pins or pins 12.
  • the backrest 1 is supported at its base by the rear legs 9 by means of aligned pins or pins 13.
  • the armchair finally comprises two lateral armrests 14 extending between the backrest 1 and the top of the base 6 to ensure the stability of the armchair, the comfort for the seated person and the adjustment of the inclinations.
  • each armrest 14 is connected at the rear, to the backrest 1 by means of aligned pins or trunnions 15 and in its central zone, to the base 6 by means of a rack 16 molded from the armrest considered and the notches 17 of which, not limited to four in the example shown, are capable of cooperating selectively with a finger 18 projecting from a tab 19 of the corresponding rear foot 9.
  • the geometric axis of the axes or pins 5 of articulation of the seat 2 on the backrest 1 is arranged in front of the geometric axis of the axes or pins 13 of articulation of the backrest 1 on the rear legs 9. Furthermore, if we consider the horizontal plane P passing through the geometric axis 13 ( Figure 2), the extreme positions 5b and 5h of the geometric axis of articulation 5 connecting the seat 2 in the backrest 1 are located below and above this plane P, the positions Sb and 5h of the common articulation corresponding to the position of the backrest 1 completely raised (shown in solid lines in FIG. 2) and respectively in the position of said fully lowered backrest (shown in broken lines in this figure 2).
  • the plane Q connecting the articulation 5 in these positions 5b and 5h is substantially vertical, which amounts to minimizing the deflection f of the circular path T connecting said positions 5b and 5h, that is to say of the trajectory of the joint 5 when the backrest 1 pivots according to the amplitude maximum angular around the joint 13 of the hind feet 9.
  • this kinematics makes it possible to distribute the forces so that the weight of the seated person has the effect of balancing the system and thus allowing this person to unlock the racks of the armrests and to modify the inclination of the backrest without having to get up or lean too far forward.
  • FIG. 3 shows an armchair made of plastic with a rigid base constituted by two lateral arches 20.
  • Each arch comprises a right front leg 21 and an arched rear leg 22 integral with one another by an upper bend 23 and a crosspiece of medium level 24.
  • the base also has, from molding with the arches 20, low crosspieces 8 and 10 connecting together the front legs 21 and the rear legs 22 respectively.
  • This chair comprises, like that of FIG. 1, a backrest 1, a seat 2 and armrests 14.
  • the backrest 1 is carried by the crosspieces 24 by means of the axes or articulation pins 13 connecting this backrest to legs 25 of these crosspieces 24.
  • the backrest 1 is also coupled via the articulations 15 to the armrests 14, which are connected to the elbows 23 of the arches 20 in an adjustable manner by means of racks 16 of said armrests cooperating selectively with fingers 18 protruding on legs 19 of said elbows.
  • the seat 2 is connected by the joints 12 to the front legs 21 and by the joints 5 to the backrest 1.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)
  • Seats For Vehicles (AREA)

Abstract

The arm-chair comprises a backrest (1) and a seat (2) articulated (at 5) with each other and (at 13) onto the base (6) of this arm-chair whose armrests (14) are themselves articulated (at 15) onto the backrest and connected to the base by means of racks (16, 18). In the device of the invention, the geometric axis of articulation (5) of the backrest (1) on the seat (2) is disposed in front of the geometric axis of articulation (13) of the backrest (1) on the base (6) and situated, when the backrest is in the completely raised position and in the completely lowered position, respectively below and above the horizontal (P) passing through this geometric axis of articulation of the backrest on the base. <IMAGE>

Description

La présente invention concerne un dispositif perfectionné pour incliner de façon réglable et conjuguée le dossier et l'assise d'un fauteuil qui sont articulées entre eux et sur le piétement de ce fauteuil dont les accoudoirs sont articulés sur le dossier et reliés au piétement par l'intermédiaire de crémaillères.The present invention relates to an improved device for tilting, in an adjustable and combined manner, the backrest and the seat of an armchair which are hinged together and on the base of this armchair, the armrests of which are articulated on the backrest and connected to the base by l 'through racks.

Un tel dispositif connu est illustré par le brevet français n° 2 596 261 qui enseigne que l'axe géométrique d'articu­lation du dossier sur l'assise est disposé derrière l'axe géomé­trique d'articulation du dossier sur le piétement et situé à l'horizontale du précédent axe lorsque le dossier est incliné en position moyenne. Ainsi, les positions extrèmes de l'axe d'articu­lation du dossier sur l'assise sont sensiblement à la verticale l'une de l'autre. Dès lors, la projection horizontale de la trajec­toire de cet axe d'articulation du dossier sur l'assise est relati­vement faible et il en résulte qu'elle peut être absorbée par les jeux de l'ensemble des axes d'articulation du fauteuil. Dans ces conditions, l'inclinaison du dossier s'accompagne d'une inclinaison de l'assise avec une translation horizontale pratiquement négli­geable de cette assise, de sorte que le montage mobile de l'axe d'articulation avant de l'assise sur le piétement qui était néces­saire dans les réalisations antérieures peut être supprimé.Such a known device is illustrated by French Patent No. 2,596,261 which teaches that the geometric axis of articulation of the backrest on the seat is disposed behind the geometric axis of articulation of the backrest on the base and located at the l 'horizontal of the previous axis when the backrest is tilted in the middle position. Thus, the extreme positions of the axis of articulation of the backrest on the seat are substantially vertical from one another. Consequently, the horizontal projection of the trajectory of this axis of articulation of the backrest on the seat is relatively small and it follows that it can be absorbed by the play of all the axes of articulation of the chair. Under these conditions, the inclination of the backrest is accompanied by an inclination of the seat with a practically negligible horizontal translation of this seat, so that the mobile mounting of the hinge pin before the seat on the base which was necessary in the previous embodiments can be removed.

Cependant, cette disposition particulière des axes d'articulation présente l'inconvénient de trop solliciter les crémaillères des accoudoirs du fauteuil, lorsqu'une personne est assise dans celui-ci étant donné que le poids du corps tend à abaisser le dossier.However, this particular arrangement of the articulation axes has the drawback of over-stressing the racks of the armrests of the chair, when a person is seated in it, given that the weight of the body tends to lower the backrest.

Par ailleurs, pour modifier le réglage de l'inclinaison du dossier, la personne assise doit se pencher en avant, d'une part, pour déverrouiller les crémaillères et, d'autre part, pour mouvoir le dossier sans perdre l'équilibre et basculer en arrière.In addition, to modify the backrest tilt setting, the seated person must lean forward, on the one hand, to unlock the racks and, on the other hand, to move the backrest without losing balance and tilting backward.

La présente invention a pour but de remédier à ces incon­vénients en conservant l'avantage du dispositif connu précité, grâce auquel en effet tout montage mobile des articulations avant peut être supprimé.The object of the present invention is to remedy these drawbacks while retaining the advantage of the aforementioned known device, by means of which any mobile mounting of the front joints can be eliminated.

Dans ce but et conformément à l'invention, l'axe géomé­trique d'articulation du dossier sur l'assise est disposé devant l'axe géométrique d'articulation du dossier sur le piétement, et situé, lorsque le dossier est en position complètement relevée et en position complètement abaissée, en dessous et respectivement au-dessus de l'horizontale passant par cet axe géométrique d'arti­culation du dossier sur le piétement.For this purpose and in accordance with the invention, the geometric axis of articulation of the backrest on the seat is placed in front of the geometric axis of articulation of the backrest on the base, and located, when the backrest is in the fully raised position. and in the completely lowered position, below and respectively above the horizontal passing through this geometric axis of articulation of the backrest on the base.

Avantageusement, les positions extrêmes de l'axe géomé­trique d'articulation du dossier sur l'assise sont sensiblement symétriques par rapport à l'horizontale passant par l'axe géomé­trique d'articulation du dossier sur le piétement.Advantageously, the extreme positions of the geometric axis of articulation of the backrest on the seat are substantially symmetrical with respect to the horizontal passing through the geometric axis of articulation of the backrest on the base.

Ce dispositif perfectionné de l'invention peut être appliqué au piétement en V du fauteuil repliable illustré par le brevet français n° 2 596 261 précité, piétement qui, de chaque côté, comporte un pied antérieur et un pied postérieur dont les extrémités supérieures sont articulées l'une sur l'autre et munies d'un doigt coopérant avec la crémaillère de l'accoudoir correspon­dant. Dans cette application, les axes d'articulation de l'assise et du dossier sont portés respectivement par ces pieds antérieurs et ces pieds postérieurs, tandis que les axes d'articulation de l'assise sur le dossier sont situés devant les axes d'articulation du dossier sur les pieds postérieurs.This improved device of the invention can be applied to the V-shaped base of the folding chair illustrated by the aforementioned French patent No. 2,596,261, which base, on each side, comprises a front foot and a rear foot, the upper ends of which are articulated one on the other and provided with a finger cooperating with the rack of the corresponding armrest. In this application, the axes of articulation of the seat and the back are carried respectively by these front feet and these rear feet, while the axes of articulation of the seat on the back are located in front of the axes of articulation of the backrest on the hind feet.

Le dispositif perfectionné de l'invention peut également être appliqué au piétement rigide d'un fauteuil, piétement qui est constitué par deux arceaux latéraux dont chacun comporte une branche ou pied antérieur et une branche ou pied postérieur reliés par une traverse de niveau moyen et faisant corps avec un coude médian supérieur muni du doigt coopérant avec la crémaillère de l'accoudoir correspondant. Dans cette application particulière, les axes d'articulation de l'assise et du dossier sont portés respecti­vement par les pieds antérieurs et les traverses, tandis que les axes d'articulation de l'assise sur le dossier sont situés devant les axes d'articulation du dossier sur les traverses.The improved device of the invention can also be applied to the rigid base of an armchair, a base which consists of two lateral arches, each of which comprises a branch or front leg and a branch or rear leg connected by a cross member of medium level and making body with an upper middle bend fitted with the finger cooperating with the rack of the corresponding armrest. In this particular application, the axes of articulation of the seat and the back are carried respectively by the front legs and the crosspieces, while the axes of articulation of the seat on the back are located in front of the axes of articulation of the file on the sleepers.

Le dispositif perfectionné selon l'invention peut aussi être appliqué aux autres types de fauteuil en matière plastique, par exemple à ceux comportant un piétement repliable en X, à condition cependant qu'au moins une pièce supplémentaire, telle qu'une biellette, soit prévue et convenablement disposée.The improved device according to the invention can also be applied to other types of plastic armchair, for example to those comprising a folding frame in X, provided, however, that at least one additional part, such as a link, is provided and suitably arranged.

Divers autres caractéristiques et avantages de l'inven­tion ressortent d'ailleurs de la description détaillée qui suit.Various other characteristics and advantages of the invention will also emerge from the detailed description which follows.

Des formes de réalisation de l'objet de l'invention sont représentées, à titre d'exemples non limitatifs, sur le dessin annexé.Embodiments of the object of the invention are shown, by way of nonlimiting examples, in the accompanying drawing.

Sur ce dessin :

  • - la figure 1 représente une élévation montrant, vue de l'intérieur, le côté droit d'un fauteuil repliable à piétement en V, fauteuil auquel le dispositif de l'invention est appliqué ;
  • - la figure 2 est un schéma faisant ressortir à plus grande échelle les avantages de la cinématique de ce dispositif ;
  • - la figure 3 est une vue analogue à la figure 1 illus­trant l'application du dispositif de l'invention à un fauteuil ayant un piétement rigide.
On this drawing :
  • - Figure 1 shows an elevation showing, seen from the inside, the right side of a folding V-shaped chair, chair to which the device of the invention is applied;
  • - Figure 2 is a diagram showing on a larger scale the advantages of the kinematics of this device;
  • - Figure 3 is a view similar to Figure 1 illustrating the application of the device of the invention to a chair having a rigid base.

La figure 1 montre un fauteuil repliable à piétement en V dont l'assise et le dossier sont réglables en inclinaison de façon conjuguée. Avantageusement, le fauteuil est fabriqué en matière plastique moulée par injection.Figure 1 shows a folding chair with a V-shaped base, the seat and back of which are adjustable in inclination. Advantageously, the chair is made of injection molded plastic.

Tel qu'il est représenté, ce fauteuil présente un niveau d'assise normal et les réglages permettent à l'occupant d'être plus ou moins penché en arrière.As shown, this chair has a normal seating level and the adjustments allow the occupant to be more or less leaning back.

En réalité, un tel fauteuil est destiné au repos et au bain de soleil. Dès lors, le niveau de son assise est plus bas et en position de bain de soleil, l'assise et le dossier se prolongent l'un l'autre suivant un niveau sensiblement horizontal (figure 2).In reality, such an armchair is intended for rest and sunbathing. Consequently, the level of its seat is lower and in the sunbathing position, the seat and the backrest extend each other at a substantially horizontal level (Figure 2).

Le fauteuil comporte un dossier 1 et une assise 2 présen­tant des oreilles latérales 3, 4 respectivement, dont deux font corps avec des tourillons alignés 5 qui traversent des trous ménagés dans les deux oreilles, afin de constituer des articula­tions situées en bas du dossier et à l'arrière de l'assise.The armchair comprises a backrest 1 and a seat 2 having lateral ears 3, 4 respectively, two of which are integral with aligned pins 5 which pass through holes made in the two ears, in order to constitute articulations situated at the bottom of the backrest and at the back of the seat.

Le fauteuil comporte également un piétement 6 constitué par deux pieds latéraux antérieurs 7 réunis au moyen d'une traverse basse 8 et par deux pieds latéraux postérieurs 9 réunis également au moyen d'une traverse basse 10. De chaque côté, les pieds anté­rieur 7 et postérieur 9 sont reliés, à leur extrémité supérieure, par un axe ou tourillon d'articulation 11.The chair also has a base 6 consisting of two front lateral legs 7 joined together by means of a low cross member 8 and by two rear lateral legs 9 also joined together by means of a lower crosspiece 10. On each side, the front 7 and rear 9 feet are connected, at their upper end, by a hinge pin or pin 11.

L'assise 2 est supportée à l'avant par les pieds anté­rieurs 7 au moyen d'axes ou tourillons alignés 12. Le dossier 1 est supporté à sa base par les pieds postérieurs 9 au moyen d'axes ou tourillons alignés 13.The seat 2 is supported at the front by the front legs 7 by means of aligned pins or pins 12. The backrest 1 is supported at its base by the rear legs 9 by means of aligned pins or pins 13.

Le fauteuil comporte enfin deux accoudoirs latéraux 14 s'étendant entre le dossier 1 et le haut du piétement 6 pour assurer la stabilité du fauteuil, le confort pour la personne assise et le réglage des inclinaisons. A cet effet, chaque accoudoir 14 est relié à l'arrière, au dossier 1 au moyen d'axes ou tourillons alignés 15 et dans sa zone médiane, au piétement 6 au moyen d'une crémaillère 16 venue de moulage avec l'accoudoir considéré et dont les crans 17, au nombre non limitatif de quatre dans l'exemple représenté, sont susceptibles de coopérer sélective­ment avec un doigt 18 faisant saillie sur une patte 19 du pied postérieur correspondant 9.The armchair finally comprises two lateral armrests 14 extending between the backrest 1 and the top of the base 6 to ensure the stability of the armchair, the comfort for the seated person and the adjustment of the inclinations. To this end, each armrest 14 is connected at the rear, to the backrest 1 by means of aligned pins or trunnions 15 and in its central zone, to the base 6 by means of a rack 16 molded from the armrest considered and the notches 17 of which, not limited to four in the example shown, are capable of cooperating selectively with a finger 18 projecting from a tab 19 of the corresponding rear foot 9.

Ainsi que cela ressort des figures 1 et 2, l'axe géomé­trique des axes ou tourillons 5 d'articulation de l'assise 2 sur le dossier 1 est disposé en avant de l'axe géométrique des axes ou tourillons 13 d'articulation du dossier 1 sur les pieds postérieurs 9. Par ailleurs, si l'on considère le plan horizontal P passant par l'axe géométrique 13 (figure 2), les positions extrèmes 5b et 5h de l'axe géométrique d'articulation 5 reliant l'assise 2 au dossier 1 sont situées en dessous et au-dessus de ce plan P, les positions Sb et 5h de l'articulation commune correspondant à la position du dossier 1 complètement relevé (représentée en trait plein sur la figure 2) et respectivement à la position dudit dossier complète­ment abaissé (représentée en trait interrompu sur cette figure 2). Avantageusement, le plan Q reliant l'articulation 5 dans ces positions 5b et 5h est sensiblement vertical, ce qui revient à réduire au minimum la flèche f de la trajectoire circulaire T reliant lesdites positions 5b et 5h, c'est-à-dire de la trajectoire de l'articulation 5 lorsque le dossier 1 pivote suivant l'amplitude angulaire maximale autour de l'articulation 13 des pieds posté­rieurs 9.As is apparent from Figures 1 and 2, the geometric axis of the axes or pins 5 of articulation of the seat 2 on the backrest 1 is arranged in front of the geometric axis of the axes or pins 13 of articulation of the backrest 1 on the rear legs 9. Furthermore, if we consider the horizontal plane P passing through the geometric axis 13 (Figure 2), the extreme positions 5b and 5h of the geometric axis of articulation 5 connecting the seat 2 in the backrest 1 are located below and above this plane P, the positions Sb and 5h of the common articulation corresponding to the position of the backrest 1 completely raised (shown in solid lines in FIG. 2) and respectively in the position of said fully lowered backrest (shown in broken lines in this figure 2). Advantageously, the plane Q connecting the articulation 5 in these positions 5b and 5h is substantially vertical, which amounts to minimizing the deflection f of the circular path T connecting said positions 5b and 5h, that is to say of the trajectory of the joint 5 when the backrest 1 pivots according to the amplitude maximum angular around the joint 13 of the hind feet 9.

Dès lors que la flèche f est très faible, les jeux fonctionnels dans les articulations sont suffisants pour la compenser, ce qui permet de renoncer à l'utilisation d'un montage mobile, par exemple par biellette, de l'articulation 12 de l'assise 2 sur les pieds antérieurs 7.As soon as the deflection f is very small, the functional clearances in the joints are sufficient to compensate for it, which makes it possible to dispense with the use of a mobile assembly, for example by link, of the articulation 12 of the seat 2 on the front legs 7.

Par ailleurs et surtout, cette cinématique permet de répartir les forces de telle façon que le poids de la personne assise a pour effet d'équilibrer le système et de permettre ainsi à cette personne de déverrouiller les crémaillères des accoudoirs et de modifier l'inclinaison du dossier sans avoir à se lever ou à se pencher trop en avant.Furthermore and above all, this kinematics makes it possible to distribute the forces so that the weight of the seated person has the effect of balancing the system and thus allowing this person to unlock the racks of the armrests and to modify the inclination of the backrest without having to get up or lean too far forward.

Le dispositif décrit dans ce qui précède est applicable à d'autres types de fauteuils et en particulier à celui représenté sur la figure 3.The device described in the foregoing is applicable to other types of armchairs and in particular to that shown in FIG. 3.

Cette figure 3 montre un fauteuil en matière plastique à piétement rigide constitué par deux arceaux latéraux 20. Chaque arceau comporte un pied antérieur droit 21 et un pied postérieur arqué 22 faisant corps entre eux par un coude supérieur 23 et une traverse de niveau moyen 24. Le piétement présente également, venues de moulage avec les arceaux 20, des traverses basses 8 et 10 reliant entre eux les pieds antérieurs 21 et respectivement les pieds postérieurs 22.This FIG. 3 shows an armchair made of plastic with a rigid base constituted by two lateral arches 20. Each arch comprises a right front leg 21 and an arched rear leg 22 integral with one another by an upper bend 23 and a crosspiece of medium level 24. The base also has, from molding with the arches 20, low crosspieces 8 and 10 connecting together the front legs 21 and the rear legs 22 respectively.

Ce fauteuil comporte, comme celui de la figure 1, un dossier 1, une assise 2 et des accoudoirs 14. Le dossier 1 est porté par les traverses 24 par l'intermédiaire des axes ou des tourillons d'articulation 13 reliant ce dossier à des pattes 25 de ces traverses 24. Le dossier 1 est en outre attelé par l'intermé­diaire des articulations 15 aux accoudoirs 14, lesquels sont reliés aux coudes 23 des arceaux 20 de façon réglable au moyen de crémail­lères 16 desdits accoudoirs coopérant sélectivement avec des doigts 18 faisant saillie sur des pattes 19 desdits coudes. L'assise 2 est reliée par les articulations 12 aux pieds antérieurs 21 et par les articulations 5 au dossier 1.This chair comprises, like that of FIG. 1, a backrest 1, a seat 2 and armrests 14. The backrest 1 is carried by the crosspieces 24 by means of the axes or articulation pins 13 connecting this backrest to legs 25 of these crosspieces 24. The backrest 1 is also coupled via the articulations 15 to the armrests 14, which are connected to the elbows 23 of the arches 20 in an adjustable manner by means of racks 16 of said armrests cooperating selectively with fingers 18 protruding on legs 19 of said elbows. The seat 2 is connected by the joints 12 to the front legs 21 and by the joints 5 to the backrest 1.

Dans ce fauteuil à piétement rigide selon la figure 3, les articulations 5 et 13 sont disposées de la même façon et pour le même résultat que les articulations portant les mêmes références du fauteuil à piétement en V selon la figure 1. Dès lors, les commentaires exposés dans ce qui précède en se référant à la figure 2 pour le fauteuil selon la figure 1 sont valables pour le fauteuil selon la figure 3.In this chair with a rigid base according to FIG. 3, the joints 5 and 13 are arranged in the same way and for the same result as the joints bearing the same references of the V-shaped chair according to FIG. 1. Therefore, the comments set out in the above with reference to FIG. 2 for the armchair according to FIG. 1 are valid for the armchair according to FIG. 3.

Bien entendu, le dispositif mis en oeuvre et illustré par cette figure 2 s'applique à tous les autres types de fauteuils, à condition parfois que des modes de liaison supplémentaires soient prévus.Of course, the device implemented and illustrated by this FIG. 2 applies to all the other types of armchairs, sometimes provided that additional connection modes are provided.

Par ailleurs, les articulations précitées peuvent être remplacées par tout autre moyen équivalent.Furthermore, the aforementioned joints can be replaced by any other equivalent means.

Claims (4)

1. Dispositif pour incliner de façon réglable et con­juguée le dossier (1) et l'assise (2) d'un fauteuil, articulés (en 5) entre eux (en 13) et sur le piétement (6 ; 20) de ce fauteuil dont les accoudoirs (14) sont eux-mêmes articulés (en 15) sur le dossier et reliés au piétement par l'intermédiaire d'un système à crémaillère (16, 18), le dispositif étant caractérisé en ce que l'axe géométrique d'articulation (5) du dossier (1) sur l'assise (2) est disposé devant l'axe géométrique d'articulation (13) du dossier (1) sur le piétement (6 20) et situé, lorsque le dossier est en position complètement relevée et an position complètement abaissée, en dessous et respectivement au-dessus de l'horizontale (P) passant par cet axe géométrique d'articulation du dossier sur le piétement.1. Device for tilting the backrest (1) and the seat (2) of an armchair in an adjustable and combined manner, articulated (in 5) with one another (in 13) and on the base (6; 20) of this armchair the armrests (14) of which are themselves articulated (at 15) on the backrest and connected to the base by means of a rack system (16, 18), the device being characterized in that the geometric axis d hinge (5) of the backrest (1) on the seat (2) is arranged in front of the geometric hinge axis (13) of the backrest (1) on the base (6 20) and located, when the backrest is in fully raised position and fully lowered position, below and respectively above the horizontal (P) passing through this geometric axis of articulation of the backrest on the base. 2. Dispositif selon la revendication 1, caractérisé en ce que les positions extrèmes (5b, 5h) de l'axe géométrique d'articu­lation (5) du dossier (1) sur l'assise (2) sont sensiblement symétriques par rapport à l'horizontale (P) passant par l'axe géométrique d'articulation du dossier sur le piétement.2. Device according to claim 1, characterized in that the extreme positions (5b, 5h) of the geometric axis of articulation (5) of the backrest (1) on the seat (2) are substantially symmetrical with respect to the 'horizontal (P) passing through the geometric axis of articulation of the backrest on the base. 3. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'il est appliqué au piétement an V (6) d'un fauteuil avantageusement en matière plastique, piétement qui, de chaque côté, comporte un pied antérieur (7) et un pied postérieur (9) dont les extrémités supérieures sont articulées (en 11) l'une sur l'autre et munies d'un doigt (18) coopérant avec la crémaillère (16) de l'accoudoir correspondant (17), les axes d 'articulation (12, 13) de l'assise (2) et du dossier (1) étant portés respective­ment par ces pieds antérieurs (7) et ces pieds postérieurs (9).3. Device according to claim 1 or 2, characterized in that it is applied to the base year V (6) of an advantageously plastic chair, base which, on each side, has a front foot (7) and a rear leg (9) whose upper ends are articulated (at 11) one on the other and provided with a finger (18) cooperating with the rack (16) of the corresponding armrest (17), the axes d 'articulation (12, 13) of the seat (2) and the backrest (1) being carried respectively by these front legs (7) and these rear legs (9). 4. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'il est appliqué au piétement rigide (20) d'un fauteuil avantageusement en matière plastique, piétement qui est constitué par deux arceaux latéraux (20) dont chacun comporte une branche ou pied antérieur (21) et une branche ou pied postérieur (22) reliés par une traverse de niveau moyen (24) et faisant corps avec un coude médian supérieur (23) muni du doigt (18) coopérant avec la crémaillère (16) de l'accoudoir correspondant (14), les axes d'articulation (12, 13) de l'assise (2) et du dossier (1) étant portés respectivement par les pieds antérieurs (21) et par les traverses (24).4. Device according to claim 1 or 2, characterized in that it is applied to the rigid base (20) of an advantageously plastic chair, base which is constituted by two lateral arches (20) each of which comprises a branch or front foot (21) and a branch or rear foot (22) connected by a medium level cross member (24) and forming a body with an upper middle elbow (23) provided with the finger (18) cooperating with the rack (16) of the corresponding armrest (14), the hinge pins (12, 13) of the seat (2) and of the backrest (1) being carried respectively by the front legs (21) and by the crosspieces (24).
EP90401356A 1989-05-25 1990-05-22 Synchronous adjustment device for the inclination of the backrest and seat of an arm-chair Withdrawn EP0399893A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8906876 1989-05-25
FR8906876A FR2647321B1 (en) 1989-05-25 1989-05-25 DEVICE FOR ADJUSTABLE AND ADJUSTABLE RECLINING OF THE BACKREST AND SEAT OF AN ARMCHAIR

Publications (1)

Publication Number Publication Date
EP0399893A1 true EP0399893A1 (en) 1990-11-28

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ID=9382017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401356A Withdrawn EP0399893A1 (en) 1989-05-25 1990-05-22 Synchronous adjustment device for the inclination of the backrest and seat of an arm-chair

Country Status (9)

Country Link
EP (1) EP0399893A1 (en)
JP (1) JPH03114408A (en)
KR (1) KR900017527A (en)
AU (1) AU626677B2 (en)
BR (1) BR9002471A (en)
CA (1) CA2017585A1 (en)
FI (1) FI902552A0 (en)
FR (1) FR2647321B1 (en)
NO (1) NO902297L (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3926406A1 (en) * 1989-08-10 1990-09-06 Kettler Metallwaren Heinz SEAT AND / OR LOUNGE FURNITURE
FR2672194A1 (en) * 1991-02-05 1992-08-07 Grosfillex Sarl ARMCHAIR WITH X-RING, ADJUSTABLE IN PARTICULAR IN INCLINATION FOR THE DOSSIER.
NL1003729C2 (en) * 1996-08-01 1998-02-05 Unimeta Nederland B V Folding chair with locking mechanism
US11185165B2 (en) * 2020-01-21 2021-11-30 Libin Chen Armchair
US11241097B2 (en) 2019-06-04 2022-02-08 Yeti Coolers, Llc Portable chair

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040063327A (en) * 2003-01-07 2004-07-14 윤병철 Chair for adjusting inclination of seat back
KR200452748Y1 (en) * 2010-11-25 2011-03-17 정무웅 Gear Driven Angle Chair

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB724305A (en) * 1952-04-30 1955-02-16 Anton Lorenz A lounge chair
GB863227A (en) * 1958-08-22 1961-03-22 Arthur Reginald Turland Improvements in or relating to adjustable chairs
BE712453A (en) * 1968-03-20 1968-07-31
FR2596261A1 (en) * 1986-03-26 1987-10-02 Grosfillex Sarl Folding armchair having an adjustable seat and backrest

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS565981Y2 (en) * 1978-01-14 1981-02-09
FR2499385B1 (en) * 1981-02-09 1986-05-02 Massonnet Henry PERFECTED ARMCHAIR IN TWO POSITIONS AND ITS COMBINATION WITH A POUF
SE459148B (en) * 1988-01-18 1989-06-12 Moebel Team Ab LOCKING DEVICE IN AN ADJUSTABLE CHAIR

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB724305A (en) * 1952-04-30 1955-02-16 Anton Lorenz A lounge chair
GB863227A (en) * 1958-08-22 1961-03-22 Arthur Reginald Turland Improvements in or relating to adjustable chairs
BE712453A (en) * 1968-03-20 1968-07-31
FR2596261A1 (en) * 1986-03-26 1987-10-02 Grosfillex Sarl Folding armchair having an adjustable seat and backrest

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3926406A1 (en) * 1989-08-10 1990-09-06 Kettler Metallwaren Heinz SEAT AND / OR LOUNGE FURNITURE
FR2672194A1 (en) * 1991-02-05 1992-08-07 Grosfillex Sarl ARMCHAIR WITH X-RING, ADJUSTABLE IN PARTICULAR IN INCLINATION FOR THE DOSSIER.
EP0498708A1 (en) * 1991-02-05 1992-08-12 Grosfillex S.A.R.L. Chair with cross legs, the backrest being adjustable in inclination
NL1003729C2 (en) * 1996-08-01 1998-02-05 Unimeta Nederland B V Folding chair with locking mechanism
US11241097B2 (en) 2019-06-04 2022-02-08 Yeti Coolers, Llc Portable chair
US11185165B2 (en) * 2020-01-21 2021-11-30 Libin Chen Armchair

Also Published As

Publication number Publication date
KR900017527A (en) 1990-12-19
JPH03114408A (en) 1991-05-15
BR9002471A (en) 1991-08-13
FI902552A0 (en) 1990-05-23
FR2647321A1 (en) 1990-11-30
NO902297D0 (en) 1990-05-23
AU5580990A (en) 1990-11-29
NO902297L (en) 1990-11-26
CA2017585A1 (en) 1990-11-25
AU626677B2 (en) 1992-08-06
FR2647321B1 (en) 1991-09-13

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