EP0183630A1 - Transformable seat - Google Patents

Transformable seat Download PDF

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Publication number
EP0183630A1
EP0183630A1 EP85440020A EP85440020A EP0183630A1 EP 0183630 A1 EP0183630 A1 EP 0183630A1 EP 85440020 A EP85440020 A EP 85440020A EP 85440020 A EP85440020 A EP 85440020A EP 0183630 A1 EP0183630 A1 EP 0183630A1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest
footrest
tilting
triangle
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Withdrawn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
EP85440020A
Other languages
German (de)
French (fr)
Inventor
Jeannine Lemaire
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.)
DIFFUSION UNIVERSELLE Ste
Original Assignee
DIFFUSION UNIVERSELLE Ste
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from FR8417837A external-priority patent/FR2573293A1/en
Application filed by DIFFUSION UNIVERSELLE Ste filed Critical DIFFUSION UNIVERSELLE Ste
Publication of EP0183630A1 publication Critical patent/EP0183630A1/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Withdrawn legal-status Critical Current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
    • A47C1/0342—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movable backrest-seat unit or back-rest
    • 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
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/006—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs convertible to stretchers or beds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/14—Standing-up or sitting-down aids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S297/00—Chairs and seats
    • Y10S297/10—Occupant-arising assist

Definitions

  • the present invention relates to automatic transformable seats, which are intended, first of all for the elderly and the disabled, but whose uses are becoming more and more widespread with a view to increasing comfort in everyday life.
  • These seats generally comprise, on the one hand, a fixed base or base, containing the energy source or sources, generally actuated jacks, and the mechanical elements transmitting the movements of these jacks to movable parts, and on the other hand said movable parts which can be the backrest or support, the seat itself and / or an extension of this seat constituting a footrest.
  • These different moving parts have different functions, which are however more or less complementary.
  • the tilting of the backrest, then of the seat is complementary to facilitate the transition to standing by an elderly person or during rehabilitation of the lower limbs, which are therefore insufficient to fulfill their normal functions.
  • a seat must both allow the backrest to be reclined and the footrest to be raised.
  • many relaxation seats must allow all possible combinations of in clinches of their various parts.
  • the present invention makes it possible to eliminate all of these drawbacks, for a seat fulfilling the maximum of useful functions.
  • the seat according to the invention consists of a fixed base, ensuring the seat of the seat on the ground, and in which is housed a single cylinder and all of the control linkage of the inclination of the seat itself, the backrest and the footrest, the movement of the piston of the jack controlling a main lever exerting its action sequentially on the tilting of the backrest, then, separately or simultaneously that of the footrest, action of the main lever itself resulting from its contact, direct or via a secondary lever, with stops triggering the tilting of levers secured to the respective axes of rotation of the three aforementioned parts of the seat, and this in one direction (or order) or in the other.
  • the single cylinder which determines all the deformations of the components of the seat between the fully extended position and the standing position acts on a single point of one of these elements, and it is this element who, playing the role of relay, in turn controls the deformations of the assembly.
  • said command is broken down into three kinematic chains each determining in turn one of the phases of said distortions.
  • a support element such as a cushion or padding, is slidably mounted on the backrest, so as to facilitate the movement of the user's back when the seat is deformed.
  • a fixed base which serves as a seat for the seat.
  • the footrest D is hinged around an axis concentric with the B axis, while the E backrest is hinged around the E axis located behind the seat C.
  • the basic operation of the headquarters is as follows.
  • piston 4 will reach another stop cooperating with a lever similar to the lever J ′, and acting on a sleeve (not visible in the drawing) coaxial with the axis B and thanks to which it can always pivot in the direction F 1 the footrest D, at an angle
  • FIGS. 1 and 2 illustrate an effective embodiment of this (or these) mechanism (s), as identified in the preamble of the present description.
  • this mechanism may comprise only one group of elements corresponding to the first kinematic chain, it is preferable, for reasons of symmetry of efforts, to have two such groups, distributed on each side of the seat, as shown in the two figures.
  • the backrest 1 is articulated at the seat 3 around axes 2 located at the curve angle and in the extension of a cross-member 30.
  • the footrest 5 is articulated to the seat 3 around axes 4 located at its end.
  • the seat 3 is reinforced at its curve 25 by a cross member 31, also serving as a point of attachment to elements of the kinematic chains.
  • the 1-3-5 mobile assembly is supported, via the kinematic chains, by a base consisting of a horizontal frame 6 reinforced by crosspieces 32 and 33 and two vertical rectangular frames 34-34 '.
  • the operation of the mechanism results from the action of a single jack 7, hooked on the one hand to an axis 8 carried by a support 9 secured to a cross member 35 of the backrest 1, and on the other hand to an axis 10 carried by a support 36 secured to a spacer 37 joining the crosspieces 32 and 33.
  • each frame 34-34 ' On each side of the seat, that is to say approximately in the vertical plane of each frame 34-34 ', is mounted the first kinematic chain.
  • This first kinematic chain consists of a main lever Il (or II ') articulated on the one hand in 2 and on the other hand in a fixed point 12 of the frame 34 (or 34'), the main levers 11 and 11 ' being joined by a horizontal crosspiece 13, and a deformable set of links 14, 16, 18 mounted so that the link 14 pivots at one end at an intermediate point 54 of the lever 11, and at the other end 15, it is pivotally joined at the ends respectively of the link 16, which is also articulated at 17 at the base of the backrest 1, and of the link 18, which is also articulated at 19 at the frame 6 of the base.
  • Each of these chains is based on the principle of the control triangle: a triangle pivots around one of its vertices under the action of a connecting rod connected to a point of action of the jack, so that connecting rods fixed to its others vertices determine the movements of the seat elements.
  • a triangle 20 is articulated at its top 21 to a connecting rod 39 connected to the fixed point 38 located on the cross member 32, that is to say integral with the attachment point 10 of the jack 7
  • a connecting rod 24 fixed at 40 to the cross member 31
  • a connecting rod 26 fixed at 41 to the cross member 32.
  • this second chain is then as follows: when the seat 3 rocks forwards, the triangle 20 also rocks forwards under the pressure of the connecting rod 24; the top 23 lowering, it drives the connecting rod 26 which in turn will lower the footrest 5.
  • a triangle 28 is articulated by its apex 42 to a connecting rod 43 pivoting around the fixed point 29 of the cross member 32, and also to a connecting rod 44 pivoting around an axis 45 fixed to the cross member 13.
  • a connecting rod 47 pivoting at a point 48 of the cross member 31.
  • a link 50 whose other end is connected at 51 to the ends of a lever 52, pivoting at the point of attachment 8 of the jack 7 on the support 9, and of a connecting rod 53 also pivoting on the axis 45.
  • this third chain is then as follows: when the jack 7 is deployed, to raise the backrest and the seat, and lift the seat, the assembly of the connecting rod 50 and the lever 52 constitutes a global lever (the connecting rod 53 playing only the role of return) exerting a traction towards the rear of the apex 49 of the triangle 26, which is then raised by pivoting around the apex 42. As also this apex 42 is also lifted by the connecting rod 44, l 'overall effect is to complete the lifting of the seat 3 when, conversely, by the play of the second kinematic chain, the footrest will complete to retract.
  • the seat leads its user to find themselves practically standing without having to make the slightest effort.
  • a lining mounted on ball bearings allows the back of the user to slide along the backrest. This results in an additional increase in comfort.
  • the seat according to the invention has just been described in a particular embodiment, namely that of a single-seat armchair. We can make many variants, by separating the two portions shown in Figures 1 and 2 of a greater length, to make a sofa or a bed with the same advantages.
  • the cushions and upholstery may be very varied, the arms being able to conceal the control of the seat mechanism, or to contain various arrangements all aimed at improving the comfort of the seat, for example a telephone handset, a remote control of an audiovisual installation, a mini-bar or the like.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)
  • Special Chairs (AREA)

Abstract

Siège transformable du type comportant un siège (3), un dossier (1) et un appuie-pieds (5) mobiles l'un par rapport à l'autre et dans leur ensemble, caractérisé en ce que dans une embase (6, 32, 33, 34, 37) fixe assurant l'assise du siège sur le sol, est logé un vérin (7) unique et un ensemble d'embiellage de commande de l'inclinaison du siège (3) proprement dit, de son dossier (1) et de son appuie-pieds (5), le mouvement du piston de ce vérin (7) unique commandant un levier principal exerçant son action séquentiellement sur le basculement du dossier (1), puis, séparément ou simultanément, le basculement du siège (3), puis séparément ou simultanément celui de l'appuie-pieds (3), cette action du levier principal résultant elle-même de son contact direct ou par l'intermédiaire de leviers secondaires, avec des butées déclenchant le basculement de leviers solidaires chacun des axes de rotation respectifs des trois parties du siège, et cela dans un sens (ou ordre) ou dans l'autre.Convertible seat of the type comprising a seat (3), a backrest (1) and a footrest (5) movable with respect to each other and as a whole, characterized in that in a base (6, 32 , 33, 34, 37) fixed ensuring the seat of the seat on the ground, is housed a single jack (7) and a set of connecting rods for controlling the inclination of the seat (3) itself, of its backrest ( 1) and its footrest (5), the movement of the piston of this single jack (7) controlling a main lever exerting its action sequentially on the tilting of the backrest (1), then, separately or simultaneously, the tilting of the seat (3), then separately or simultaneously that of the footrest (3), this action of the main lever itself resulting from its direct contact or by means of secondary levers, with stops triggering the tilting of integral levers each of the respective axes of rotation of the three parts of the seat, and this in one direction (or order) or the other.

Description

La présente invention concerne les sièges transformables automatiques, qui sont destinés, en premier lieu aux vieillards et aux handicapés, mais dont les usages se répandent de plus en plus dans la perspective de l'accroissement du confort dans la vie courante.The present invention relates to automatic transformable seats, which are intended, first of all for the elderly and the disabled, but whose uses are becoming more and more widespread with a view to increasing comfort in everyday life.

Ces sièges comportent, en règle générale, d'une part un socle ou embase fixe, contenant la ou les sources d'énergie, généralement des vérins à commande électrique, et les éléments mécaniques transmettant les mouvements de ces vérins à des parties mobiles, et d'autre part lesdites parties mobiles qui peuvent être le dossier ou appui, le siège proprement dit et/ou un prolongement de ce siège constituant un appui-pieds. Ces différentes parties mobiles ont des fonctions différentes, qui sont cependant plus ou moins complémentaires. Ainsi par exemple, le basculement vers l'avant du dossier, puis du siège, se complètent pour faciliter le passage à la station debout d'une personne âgée ou en cours de rééducation des membres inférieurs, lesquels sont donc insuffisants pour remplir leurs fonctions normales. A l'inverse, pour offrir le maximum de confort en vue du repos, un siège doit à la fois permettre l'inclinaison vers l'arrière de son dossier et le relèvement de l'appui-pieds. Enfin, de nombreux sièges de relaxation doivent permettre toutes les combinaisons possibles d'inclinaisons de leurs diverses parties.These seats generally comprise, on the one hand, a fixed base or base, containing the energy source or sources, generally actuated jacks, and the mechanical elements transmitting the movements of these jacks to movable parts, and on the other hand said movable parts which can be the backrest or support, the seat itself and / or an extension of this seat constituting a footrest. These different moving parts have different functions, which are however more or less complementary. Thus, for example, the tilting of the backrest, then of the seat, is complementary to facilitate the transition to standing by an elderly person or during rehabilitation of the lower limbs, which are therefore insufficient to fulfill their normal functions. . Conversely, to offer maximum comfort with a view to rest, a seat must both allow the backrest to be reclined and the footrest to be raised. Finally, many relaxation seats must allow all possible combinations of in clinches of their various parts.

Pour atteindre certains de ces résultats, on a déjà proposé de nombreux mécanismes. Toutefois, toutes les réalisations connues présentent au moins l'un, sinon la totalité des inconvénients suivants :

  • 1. le plus souvent plusieurs sources d'énergie ou organes de commande,
  • 2. une extrême complexité, liée au grand nombre de fonctions à sélectionner et à remplir,
  • 3. une absence de corrélation entre les fonctions et/ou leurs organes de commande,
  • 4. un prix d'autant plus élevé que la complexité du mécanisme est grande.
To achieve some of these results, many mechanisms have already been proposed. However, all known embodiments have at least one, if not all of the following drawbacks:
  • 1. most often several sources of energy or control devices,
  • 2. extreme complexity, linked to the large number of functions to be selected and fulfilled,
  • 3. an absence of correlation between the functions and / or their control members,
  • 4. the higher the price, the greater the complexity of the mechanism.

La présente invention permet d'éliminer la totalité de ces inconvénients, pour un siège remplissant le maximum de fonctions utiles.The present invention makes it possible to eliminate all of these drawbacks, for a seat fulfilling the maximum of useful functions.

A cet effet, le siège selon l'invention'se compose d'une embase fixe, assurant l'assise du siège sur le sol, et dans laquelle est logé un vérin unique et l'ensemble de l'embiellage de commande de l'inclinaison du siège proprement dit, du dossier et de l'appuie-pieds, le mouvement du piston du vérin commandant un levier principal exerçant son action séquentiellement sur le basculement du dossier, puis, séparément ou simultanément celui de l'appuie-pieds, cette action du levier principal résultant elle-même de son contact, direct ou par l'intermédiaire d'un levier secondaire, avec des butées déclenchant le basculement de leviers solidaires des axes de rotation respectifs des trois parties précitées du siège, et cela dans un sens (ou ordre) ou dans l'autre.For this purpose, the seat according to the invention 'consists of a fixed base, ensuring the seat of the seat on the ground, and in which is housed a single cylinder and all of the control linkage of the inclination of the seat itself, the backrest and the footrest, the movement of the piston of the jack controlling a main lever exerting its action sequentially on the tilting of the backrest, then, separately or simultaneously that of the footrest, action of the main lever itself resulting from its contact, direct or via a secondary lever, with stops triggering the tilting of levers secured to the respective axes of rotation of the three aforementioned parts of the seat, and this in one direction (or order) or in the other.

Plus précisément, selon la présente invention, le vérin unique qui détermine la totalité des déformations des éléments constitutifs du siège entre la position complètement allongée et la position debout agit sur un point unique de l'un de ces éléments, et c'est cet élément qui, jouant le rôle de relais, commande à son tour les déformations de l'ensemble.More specifically, according to the present invention, the single cylinder which determines all the deformations of the components of the seat between the fully extended position and the standing position acts on a single point of one of these elements, and it is this element who, playing the role of relay, in turn controls the deformations of the assembly.

Par ailleurs, ladite commande est décomposée en trois chaînes cinématiques déterminant chacune à son tour l'une des phases desdit<s déformations.Furthermore, said command is broken down into three kinematic chains each determining in turn one of the phases of said distortions.

En se référant à la manoeuvre "relèvement" du siège :

  • - la première chaîne cinématique consiste en un parallélogramme provoquant par sa déformation le relèvement du dossier par rapport à l'assise,
  • - la seconde chaîne cinématique consiste en un premier jeu de bielles assemblées à un premier triangle, et provoquant à la fois quand le triangle pivote, le relèvement de l'assise et son soulèvement par rapport à l'embase,
  • - la troisième chaîne cinématique consiste en un second jeu de bielles assemblées à un second triangle, et provoquant à la fois, quand le triangle pivote, la fin des déplacements de l'assise et le rabattement vers le bas de l'appuie-pieds.
Referring to the "raising" maneuver of the seat:
  • - the first kinematic chain consists of a parallelogram causing its deformation to raise the backrest relative to the seat,
  • the second kinematic chain consists of a first set of connecting rods assembled to a first triangle, and causing both when the triangle pivots, the raising of the seat and its lifting relative to the base,
  • - The third kinematic chain consists of a second set of connecting rods assembled to a second triangle, and causing both, when the triangle pivots, the end of the seat movements and the downward folding of the footrest.

Bien entendu, dans la manoeuvre "retour à la position allongée", les trois chaînes cinématiques remplissent des rôles inverses, dans l'ordre inverse.Of course, in the "return to the extended position" maneuver, the three kinematic chains fulfill reverse roles, in reverse order.

Dans les deux cas, l'intervention des trois chaînes cinématiques résulte du simple déplacement du point d'application du vérin sur l'élément mobile du siège auquel il est associé.In both cases, the intervention of the three kinematic chains results from the simple displacement of the point of application of the jack on the movable element of the seat with which it is associated.

Selon une caractéristique supplémentaire, un élément d'appui, tel qu'un coussin ou capitonnage, est monté coulissant sur le dossier, de manière à faciliter le déplacement du dos de l'usager au moment des déformations du siège.According to an additional characteristic, a support element, such as a cushion or padding, is slidably mounted on the backrest, so as to facilitate the movement of the user's back when the seat is deformed.

On va maintenant décrire plus en détail l'invention en se référant au dessin annexé sur lequel :

  • - la figure A est un schéma de principe illustrant le siège selon l'invention et son mode de fonctionnement,
  • - la figure 1 est une vue en perspective de la partie droite du mécanisme de commande des déformations du siège selon l'invention, et
  • - la figure 2 est une vue semblable de la partie gauche.
The invention will now be described in more detail with reference to the accompanying drawing in which:
  • FIG. A is a block diagram illustrating the seat according to the invention and its operating mode,
  • - Figure 1 is a perspective view of the right part of the seat deformation control mechanism according to the invention, and
  • - Figure 2 is a similar view of the left side.

On va tout d'abord se référer à la figure A du dessin annexé, qui représente de manière très schématique le fonctionnement du siège selon l'invention.We will first refer to Figure A of the accompanying drawing, which very schematically shows the operation of the seat according to the invention.

Sur ce dessin on a désigné par la référence générale A l'embase fixe qui sert d'assise au siège.In this drawing we have designated by the general reference A fixed base which serves as a seat for the seat.

Sur cette embase est articulé autour d'un axe B le côté avant de la partie formant siège C.On this base is articulated around an axis B the front side of the seat part C.

Autour d'un axe concentrique à l'axe B est articulé l'appuie-pieds D, tandis qu'autour de l'axe E situé à l'arrière du siège C, est articulé le dossier F.The footrest D is hinged around an axis concentric with the B axis, while the E backrest is hinged around the E axis located behind the seat C.

L'ensemble des déplacements de tous ces éléments est assuré par un vérin unique représenté par G, dont le piston H-H' agit sur des leviers schématisés par J et J', le basculement de ces leviers ayant pour effet de faire pivoter les axes tels que B et E, de manière à faire basculer simultanément les éléments du siège qui leurs sont associés.All of the movement of all these elements is ensured by a single cylinder represented by G, the piston HH 'of which acts on levers shown diagrammatically by J and J', the tilting of these levers having the effect of pivoting the axes such that B and E, so as to simultaneously tilt the seat elements associated with them.

Le fonctionnement fondamental du siège est le suivant.The basic operation of the headquarters is as follows.

Dans un premier temps, le piston H exerçant son action sur le levier J, fait pivoter le dossier F dans le sens de la flèche F1, d'un angle désigné ici par α. Arrivé en ce point, le même piston H va exercer son action sur une butée à laquelle il parvient et qui a pour effet de faire basculer en même temps le siège C dans la même direction F et d'un angle & . A ce moment selon les embiellages sélectionnés, ou bien le dossier F demeurera immobile par rapport au siège C, ou bien il poursuivra lui aussi son basculement dans le même sens FI pour parvenir à un angle γ.Initially, the piston H exerting its action on the lever J, makes the file F pivot in the direction of the arrow F 1 , by an angle designated here by α. Arrived at this point, the same piston H will exert its action on a stop which it reaches and which has the effect of tilting the seat C at the same time in the same direction F and by an angle &. At this time, depending on the selected linkages, either the backrest F will remain stationary relative to the seat C, or else it will also continue to tilt in the same direction F I to reach an angle γ.

Enfin le piston 4 atteindra une autre butée coopérant avec un levier semblable au levier J', et agissant sur un manchon (non visible sur le dessin) coaxial à l'axe B et grâce auquel il pourra faire pivoter toujours dans le sens F1 l'appuie-pieds D, d'un angleFinally the piston 4 will reach another stop cooperating with a lever similar to the lever J ′, and acting on a sleeve (not visible in the drawing) coaxial with the axis B and thanks to which it can always pivot in the direction F 1 the footrest D, at an angle

On aura donc obtenu, grâce à l'unique vérin G, le basculement successif et/ou simultané des trois parties du siège, chacune de l'angle souhaité, et cela grâce à la simple sélection d'un embiellage et de butées correspondantes, ayant pour effet de transmettre le déplacement du piston H à des leviers solidaires des axes des trois parties, le basculement de ces leviers déterminant la rotation de ses axes, et par suite le déplacement des parties en question.We will therefore have obtained, thanks to the single jack G, the successive and / or simultaneous tilting of the three parts of the seat, each of the desired angle, and this thanks to the simple selection of a connecting rod assembly and corresponding stops, having the effect of transmitting the displacement of the piston H to levers integral with the axes of the three parts, the tilting of these levers determining the rotation of its axes, and consequently the displacement of the parts in question.

Bien entendu, le fonctionnement du vérin G en sens contraire déterminera le déplacement des trois parties du siège également en sens contraire, avec les mêmes avantages c'est-à-dire ensemble ou simultanément, et chacun de l'angle choisi.Of course, the operation of the cylinder G in the opposite direction will determine the displacement of the three parts of the seat also in the opposite direction, with the same advantages, that is to say together or simultaneously, and each of the angle chosen.

Les avantages d'un tel système sont évidents par rapport à tous les mécanismes connus :

  • - le vérin G est unique, de sorte qu'au moyen d'une commande également unique, par exemple par un bouton disposés à proximité de la main de l'occupant du fauteuil, cet occupant pourra déterminer la disposition et la répartition des différentes parties du fauteuil par une seule manoeuvre,
  • - malgré le grand nombre de fonctions qu'il est possible d'exécuter, la manoeuvre unique détermine par un mécanisme extrêmement simple se composant d'un levier et d'un embiellage unique coopérant avec des butées appropriées, toutes ses fonctions, prévues à l'avance,
  • - la corrélation entre les fonctions est déterminée par la répartition des butées par rapport aux leviers et à l'embiellage,
  • - il résulte de cette simplicité un prix de revient extrêmement bas pour un tel fauteuil, malgré les services remarquables dont il permet de bénéficier.
The advantages of such a system are obvious compared to all known mechanisms:
  • - the actuator G is unique, so that by means of an equally unique control, for example by a button arranged near the hand of the occupant of the wheelchair, this occupant can determine the arrangement and the distribution of the different parts of the chair by a single operation,
  • - despite the large number of functions that it is possible to perform, the single maneuver determines by an extremely simple mechanism consisting of a lever and a single linkage cooperating with appropriate stops, all its functions provided for in the 'advanced,
  • - the correlation between the functions is determined by the distribution of the stops relative to the levers and the crankshaft,
  • - it follows from this simplicity an extremely low cost price for such an armchair, despite the remarkable services which it allows to benefit.

Bien entendu la représentation donnée ici du mécanisme selon l'invention est totalement schématique, et les mécanismes permettant d'atteindre le résultat décrit sont quelque peu plus complexes, comme il apparaît sur les figures 1 et 2 qui illustrent un mode de réalisation effective de ce (ou ces) mécanisme(s), tel qu'identifié dans le préambule de la présente description.Of course the representation given here of the mechanism according to the invention is completely schematic, and the mechanisms making it possible to achieve the described result that little more complex, as it appears on FIGS. 1 and 2 which illustrate an effective embodiment of this (or these) mechanism (s), as identified in the preamble of the present description.

Il est bien entendu que, bien que le vérin 7 apparaisse à la fois sur ces deux figures, ledit mécanisme ne comporte qu'un vérin unique, commandé par un bouton unique par l'usager.It is understood that, although the cylinder 7 appears at the same time in these two figures, said mechanism comprises only a single cylinder, controlled by a single button by the user.

De même, à l'inverse, bien que ce mécanisme puisse ne comporter qu'un seul groupe d'éléments correspondant à la première chaîne cinématique, il est préférable, pour des raisons de symétrie d'efforts, de disposer deux tels groupes, répartis de chaque côté du siège, comme il est représenté sur les deux figures.Similarly, conversely, although this mechanism may comprise only one group of elements corresponding to the first kinematic chain, it is preferable, for reasons of symmetry of efforts, to have two such groups, distributed on each side of the seat, as shown in the two figures.

En se référant aux figures 1 et 2, le mécanisme selon l'invention vise les déformations de trois éléments de base de forme générale rectangulaire, représentés en position relevée :

  • - un dossier 1, galbé en 53 vers l'arrière ;
  • - une assise 3, galbée en 25 vers le haut ;
  • - un repose-pieds 5, galbé en 27 vers le haut.
With reference to FIGS. 1 and 2, the mechanism according to the invention aims at the deformations of three basic elements of generally rectangular shape, represented in the raised position:
  • - a backrest 1, curved at 53 towards the rear;
  • - a seat 3, curved at 25 upwards;
  • - a footrest 5, curved at 27 upwards.

Les éléments latéraux de ces trois éléments sont réunis par des traverses horizontales, qui seront référencées à mesure de la description.The lateral elements of these three elements are joined by horizontal crosspieces, which will be referenced as the description proceeds.

Le dossier 1 est articulé à l'assise 3 autour d'axes 2 situés à l'angle de galbe et dans le prolongement d'une traverse 30.The backrest 1 is articulated at the seat 3 around axes 2 located at the curve angle and in the extension of a cross-member 30.

Le repose-pieds 5 est articulé à l'assise 3 autour d'axes 4 situés à son extrémité.The footrest 5 is articulated to the seat 3 around axes 4 located at its end.

L'assise 3 est renforcée au niveau de son galbe 25 par une traverse 31, servant également de point d'accrochage à des éléments des chaînes cinématiques.The seat 3 is reinforced at its curve 25 by a cross member 31, also serving as a point of attachment to elements of the kinematic chains.

Enfin, l'ensemble mobile 1-3-5 est supporté, par l'intermédiaire des chaînes cinématiques, par une embase constituée d'un cadre horizontal 6 renforcé par des traverses 32 et 33 et de deux cadres verticaux rectangulaires 34-34'.Finally, the 1-3-5 mobile assembly is supported, via the kinematic chains, by a base consisting of a horizontal frame 6 reinforced by crosspieces 32 and 33 and two vertical rectangular frames 34-34 '.

Le fonctionnement du mécanisme résulte de l'action d'un vérin unique 7, accroché à une part à un axe 8 porté par un support 9 solidaire d'une traverse 35 du dossier 1, et d'autre part à un axe 10 porté par un support 36 solidaire d'une entretoise 37 réunissant les traverses 32 et 33.The operation of the mechanism results from the action of a single jack 7, hooked on the one hand to an axis 8 carried by a support 9 secured to a cross member 35 of the backrest 1, and on the other hand to an axis 10 carried by a support 36 secured to a spacer 37 joining the crosspieces 32 and 33.

Sur chaque côté du siège, c'est-à-dire approximativement dans le plan vertical de chaque cadre 34-34', est montée la première chaîne cinématique.On each side of the seat, that is to say approximately in the vertical plane of each frame 34-34 ', is mounted the first kinematic chain.

Cette première chaîne cinématique se compose d'un levier principal Il (ou II') articulé d'une part en 2 et d'autre part en un point fixe 12 du cadre 34 (ou 34'), les leviers principaux 11 et 11' étant réunis par une traverse horizontale 13, et d'un ensemble déformable de biellettes 14, 16, 18 montées de manière que la biellette 14 pivote à une extrémité en un point intermédiaire 54 du levier 11, et à l'autre extrémité 15, elle est réunie pivotante aux extrémités respectivement de la biellette 16, articulée par ailleurs en 17 à la base du dossier 1, et de la biellette 18, articulée par ailleurs en 19 au cadre 6 de l'embase.This first kinematic chain consists of a main lever Il (or II ') articulated on the one hand in 2 and on the other hand in a fixed point 12 of the frame 34 (or 34'), the main levers 11 and 11 ' being joined by a horizontal crosspiece 13, and a deformable set of links 14, 16, 18 mounted so that the link 14 pivots at one end at an intermediate point 54 of the lever 11, and at the other end 15, it is pivotally joined at the ends respectively of the link 16, which is also articulated at 17 at the base of the backrest 1, and of the link 18, which is also articulated at 19 at the frame 6 of the base.

Le fonctionnement de cette première chaîne cinématique est le suivant :

  • en partant de la position basse complètement allongée où les parties 1 à 5 sont alignées, vers la position relevée, le vérin 7 s'allonge et, ce faisant, dans un premier temps, il repousse le point 8 en faisant basculer vers l'avant le dossier 1 autour de l'axe 2. Quand le dossier 1 a atteint une certaine position relevée par rapport à l'assise 3, il s'arrête de basculer et, comme le vérin continue de s'allonger, le point 17 auquel est articulée la bielle 16 continue de s'éloigner du point 15, et par suite tire sur la biellette 18 et la biellette 14. Par conséquent, quand le vérin s'allonge, le dossier continue de se soulever par rapport à l'assise, mais en plus celle-ci se soulève légèrement, puis quand le dossier a atteint sa position maximum le vérin continue de soulever l'ensemble assise + dossier, en même temps que le point 15 s'éloigne de la bielle 11, ce qui a pour conséquence que l'ensemble 1,3 demeurant fixe l'un par rapport à l'autre et se soulève jusqu'à sa position finale, l'assise est soulevée au-dessus de l'embase fixe. On peut donc dire que l'ensemble du soulèvement du dossier puis du soulèvement ensemble du dossier et de l'assise est assuré par ces organes.
The operation of this first kinematic chain is as follows:
  • starting from the fully extended low position where parts 1 to 5 are aligned, towards the raised position, the actuator 7 lengthens and, in doing so, at first, it pushes the point 8 by tilting forward the backrest 1 around the axis 2. When the backrest 1 has reached a certain raised position relative to the seat 3, it stops tilting and, as the jack continues to lengthen, point 17 at which is articulated the connecting rod 16 continues to move away from point 15, and consequently pulls on the connecting rod 18 and the connecting rod 14. Consequently, when the jack lengthens, the backrest continues to lift relative to the seat, but in addition it lifts slightly, then when the backrest has reached its maximum position the jack continues to lift the seat + backrest assembly, at the same time as point 15 moves away from the connecting rod 11, which has the consequence that the assembly 1.3 remains fixed one by relative to the other and lifts up to its final position, the seat is raised above the fixed base. We can therefore say that the whole lifting of the file and then the lifting together of the file and the seat is provided by these bodies.

On va maintenant décrire les deux autres chaînes cinématiques, qui ont pour effet de provoquer la fin du soulèvement de l'assise au-dessus de l'embase pendant l'abaissement du repose-pieds.We will now describe the other two kinematic chains, which have the effect of causing the end of the lifting of the seat above the base during the lowering of the footrest.

Chacune de ces chaînes repose sur le principe du triangle de commande : un triangle pivote autour d'un de ses sommets sous l'action d'une bielle reliée à un point d'action du vérin, de sorte que des bielles fixées à ses autres sommets déterminent les déplacements des éléments du siège.Each of these chains is based on the principle of the control triangle: a triangle pivots around one of its vertices under the action of a connecting rod connected to a point of action of the jack, so that connecting rods fixed to its others vertices determine the movements of the seat elements.

Dans le cas de la seconde chaîne cinématique, un triangle 20 est articulé à son sommet 21 à une bielle 39 reliée au point fixe 38 situé sur la traverse 32, c'est-à-dire solidaire du point d'accrochage 10 du vérin 7. A l'autre sommet 22 est articulée une bielle 24 fixée en 40 à la traverse 31, tandis qu'à l'autre sommet 23 est articulée une bielle 26 fixée en 41 à la traverse 32.In the case of the second kinematic chain, a triangle 20 is articulated at its top 21 to a connecting rod 39 connected to the fixed point 38 located on the cross member 32, that is to say integral with the attachment point 10 of the jack 7 At the other apex 22 is articulated a connecting rod 24 fixed at 40 to the cross member 31, while at the other apex 23 is articulated a connecting rod 26 fixed at 41 to the cross member 32.

Le fonctionnement de cette seconde chaîne est alors le suivant : quand l'assise 3 bascule vers l'avant, le triangle 20 bascule également vers l'avant sous la pression de la bielle 24 ; le sommet 23 s'abaissant, il entraîne la bielle 26 qui va à son tour abaisser le repose-pieds 5.The operation of this second chain is then as follows: when the seat 3 rocks forwards, the triangle 20 also rocks forwards under the pressure of the connecting rod 24; the top 23 lowering, it drives the connecting rod 26 which in turn will lower the footrest 5.

Dans le cas de la troisième chaîne cinématique, un triangle 28 est articulé par son sommet 42 à une bielle 43 pivotant autour du point fixe 29 de la traverse 32, et également à une bielle 44 pivotant autour d'un axe 45 fixé à la traverse 13. A un autre sommet 46 du triangle pivote une biellette 47 pivotant en un point 48 de la traverse 31. Enfin au troisième sommet 49 est articulée une biellette 50 dont l'autre extrémité est reliée en 51 aux extrémités d'un levier 52, pivotant au point d'accrochage 8 du vérin 7 sur le support 9, et d'une bielle 53 pivotant également sur l'axe 45.In the case of the third kinematic chain, a triangle 28 is articulated by its apex 42 to a connecting rod 43 pivoting around the fixed point 29 of the cross member 32, and also to a connecting rod 44 pivoting around an axis 45 fixed to the cross member 13. At another vertex 46 of the triangle pivots a connecting rod 47 pivoting at a point 48 of the cross member 31. Finally at third vertex 49 is articulated a link 50 whose other end is connected at 51 to the ends of a lever 52, pivoting at the point of attachment 8 of the jack 7 on the support 9, and of a connecting rod 53 also pivoting on the axis 45.

Le fonctionnement de cette troisième chaîne est alors le suivant : quand le vérin 7 se déploie, pour relever le dossier et l'assise, et soulever l'assise, l'ensemble de la bielle 50 et du levier 52 constitue un levier global (la bielle 53 ne jouant que le rôle de renvoi) exerçant une traction vers l'arrière du sommet 49 du triangle 26, qui se relève alors en pivotant autour du sommet 42. Comme par ailleurs ce sommet 42 est également soulevé par la bielle 44, l'effet d'ensemble est d'achever le soulèvement de l'assise 3 au moment où, réciproquement, par le jeu de la seconde chaîne cinématique, le repose-pieds va achever de se rétracter.The operation of this third chain is then as follows: when the jack 7 is deployed, to raise the backrest and the seat, and lift the seat, the assembly of the connecting rod 50 and the lever 52 constitutes a global lever (the connecting rod 53 playing only the role of return) exerting a traction towards the rear of the apex 49 of the triangle 26, which is then raised by pivoting around the apex 42. As also this apex 42 is also lifted by the connecting rod 44, l 'overall effect is to complete the lifting of the seat 3 when, conversely, by the play of the second kinematic chain, the footrest will complete to retract.

En fin de course, le siège amène son usager à se retrouver pratiquement debout sans avoir eu à fournir le moindre effort. Pour faciliter encore davantage ce rétablissement, une garniture montée sur roulements à bille permet au dos de l'usager de glisser le long du dossier. Il en résulte un accroissement supplémentaire du confort.At the end of the race, the seat leads its user to find themselves practically standing without having to make the slightest effort. To further facilitate this recovery, a lining mounted on ball bearings allows the back of the user to slide along the backrest. This results in an additional increase in comfort.

Bien entendu, à l'inverse, l'usager pourra passer de la station debout à la position complètement allongée des pieds à la tête sans aucun effort.Of course, conversely, the user will be able to pass from the standing station to the fully lying position from feet to head without any effort.

Le siège selon l'invention vient d'être décrit dans une réalisation particulière, à savoir celle d'un fauteuil uni-place. On pourra en réaliser de nombreuses variantes, en séparant les deux portions représentées aux figures 1 et 2 d'une plus grande longueur, pour en faire un divan ou un lit présentant les mêmes avantages. De même les coussins et capitonnages pourront être très variés, les bras pouvant dissimuler la commande du mécanisme du siège, ou contenir divers aménagements visant tous à améliorer le confort du siège, par exemple un combiné téléphonique, une télécommande d'une installation audiovisuelle, un mini-bar ou analogues.The seat according to the invention has just been described in a particular embodiment, namely that of a single-seat armchair. We can make many variants, by separating the two portions shown in Figures 1 and 2 of a greater length, to make a sofa or a bed with the same advantages. Likewise, the cushions and upholstery may be very varied, the arms being able to conceal the control of the seat mechanism, or to contain various arrangements all aimed at improving the comfort of the seat, for example a telephone handset, a remote control of an audiovisual installation, a mini-bar or the like.

Claims (5)

1. Siège transformable du type comportant un siège, un dossier et un appuie-pieds mobiles l'un par rapport à l'autre et dans leur ensemble, caractérisé en ce que dans une embase fixe assurant l'assise du siège sur le sol, est logé un vérin unique et un ensemble d'embiellage de commande de l'inclinaison du siège proprement dit, de son dossier et de son appuie-pieds, le mouvement du piston de ce vérin unique commandant un levier principal exerçant son action séquentiellement sur le basculement du dossier, puis, séparément ou simultanément, le basculement du siège, puis séparément ou simultanément celui de l'appuie-pieds, cette action du levier principal résultant elle-même de son contact direct ou par l'intermédiaire de leviers secondaires, avec des butées déclenchant le basculement de leviers solidaires chacun des axes de rotation respectifs des trois parties du siège, et cela dans un sens (ou ordre) ou dans l'autre.1. Convertible seat of the type comprising a seat, a backrest and a footrest movable relative to one another and as a whole, characterized in that in a fixed base ensuring the seat of the seat on the ground, is housed a single cylinder and a set of connecting rods controlling the inclination of the seat itself, its backrest and its footrest, the movement of the piston of this single cylinder controlling a main lever exerting its action sequentially on the tilting of the backrest, then, separately or simultaneously, the tilting of the seat, then separately or simultaneously that of the footrest, this action of the main lever itself resulting from its direct contact or via secondary levers, with stops triggering the tilting of integral levers each of the respective axes of rotation of the three parts of the seat, and this in one direction (or order) or the other. 2. Siège selon la revendication 1, caractérisé en ce que le vérin unique qui détermine la totalité des déformations des éléments constitutifs du siège entre la position complètement allongée et la position debout agit sur un point unique de l'un de ces éléments, cet élément, jouant le rôle de relais, commandant à son tour les déformations de l'ensemble.2. Seat according to claim 1, characterized in that the single cylinder which determines all the deformations of the components of the seat between the fully extended position and the standing position acts on a single point of one of these elements, this element , playing the role of relay, in turn controlling the deformations of the whole. 3. Siège selon la revendication 2, caractérisé en ce que ladite commande est décomposée en trois chaînes cinématiques déterminant chacune à son tour l'une des phases desdites déformations.3. Seat according to claim 2, characterized in that said command is broken down into three kinematic chains each determining in turn one of the phases of said deformations. 4. Siège selon la revendication 3, caractérisé en ce que, en se référant au passage de la position "entièrement allongée" à la station debout, - la première chaîne cinématique consiste en un parallélogramme provoquant par sa déformation le relèvement du dossier par rapport à l'assise, - la seconde chaîne cinématique consiste en un premier jeu de bielles assemblées à un premier triangle, et provoquant à la fois quand le triangle pivote, le relèvement de l'assise et son soulèvement par rapport à l'embase, - la troisième chaîne cinématique consiste en un second jeu de bielles assemblées à un second triangle, et provoquant à la fois quand le triangle pivote, la fin des déplacements de l'assise et le rabattement vers le bas de l'appuie-pieds, et inversement lors du passage de la station debout à la position complètement allongée. 4. Seat according to claim 3, characterized in that, with reference to the passage from the "fully extended" position to the standing station, - the first kinematic chain consists of a parallelogram causing its deformation to raise the backrest relative to the seat, - the second kinematic chain consists of a first set of connecting rods assembled to a first triangle, and causing both when the triangle pivots, the raising of the seat and its lifting relative to the base, the third kinematic chain consists of a second set of connecting rods assembled to a second triangle, and causing both when the triangle pivots, the end of the movements of the seat and the downward folding of the footrest, and conversely when switching from the standing station to the fully lying position. 5. Siège selon les revendications 1 à 4, caractérisé en ce qu'un élément d'appui, tel qu'un coussin ou capitonnage, est monté coulissant sur le dossier, de manière à faciliter le déplacement du dos de l'usager au moment des déformations du siège.5. Seat according to claims 1 to 4, characterized in that a support element, such as a cushion or padding, is slidably mounted on the backrest, so as to facilitate the movement of the back of the user at the time deformations of the seat.
EP85440020A 1984-11-21 1985-08-02 Transformable seat Withdrawn EP0183630A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8417837 1984-11-21
FR8417837A FR2573293A1 (en) 1984-11-21 1984-11-21 Convertible seat
FR8419495 1984-12-18
FR8419495A FR2574644A2 (en) 1984-11-21 1984-12-18 TRANSFORMABLE SEAT

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EP0183630A1 true EP0183630A1 (en) 1986-06-04

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EP85440020A Withdrawn EP0183630A1 (en) 1984-11-21 1985-08-02 Transformable seat

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US (1) US4752100A (en)
EP (1) EP0183630A1 (en)
AU (1) AU5023585A (en)
CA (1) CA1250799A (en)
DK (1) DK535485A (en)
FI (1) FI854097A0 (en)
FR (1) FR2574644A2 (en)
GR (1) GR852809B (en)
MC (1) MC1686A1 (en)
NO (1) NO854183L (en)
PT (1) PT81524B (en)

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US5520439A (en) * 1994-11-17 1996-05-28 Blount; Eric D. Fully reclinable elevator lift chair
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US6811220B2 (en) * 2001-10-02 2004-11-02 North American Manufacturing Company, Inc. Apparatus for automatically raising and lowering a seat
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US9072643B2 (en) * 2011-11-11 2015-07-07 Starship Enterprises, Llc Device, system and method for transferring a person from a horizontal to a sitting position or vice versa
CN105167431B (en) * 2015-07-28 2017-11-07 浙江工业大学 Electric sofa frame
US9925105B1 (en) 2017-08-23 2018-03-27 Uniquie Mobility Devices, Llc. Patient transfer device

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US2714922A (en) * 1952-10-17 1955-08-09 Joseph L Mckibban Adjustable reclining chair
FR1430563A (en) * 1964-03-17 1966-05-20
DE3316533A1 (en) * 1983-05-06 1984-11-08 Provenda Marketing AG, Herisau WORK CHAIR, ESPECIALLY OFFICE CHAIR

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626155A1 (en) * 1988-01-27 1989-07-28 Salons Direct Usine MULTIFUNCTION AND MULTIPOSITION ARMCHAIR
WO1989006923A1 (en) * 1988-01-27 1989-08-10 Salons Direct Usine Multipurpose, multiposition reclining chair

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DK535485D0 (en) 1985-11-20
MC1686A1 (en) 1986-07-18
PT81524B (en) 1987-01-12
AU5023585A (en) 1986-05-29
FI854097A0 (en) 1985-10-21
NO854183L (en) 1986-05-22
FR2574644A2 (en) 1986-06-20
CA1250799A (en) 1989-03-07
PT81524A (en) 1985-12-01
GR852809B (en) 1986-03-24
DK535485A (en) 1986-05-22
US4752100A (en) 1988-06-21

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