EP1488770B1 - Stand-up chair with self-modifying tilting of the backrest - Google Patents

Stand-up chair with self-modifying tilting of the backrest Download PDF

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Publication number
EP1488770B1
EP1488770B1 EP04356101A EP04356101A EP1488770B1 EP 1488770 B1 EP1488770 B1 EP 1488770B1 EP 04356101 A EP04356101 A EP 04356101A EP 04356101 A EP04356101 A EP 04356101A EP 1488770 B1 EP1488770 B1 EP 1488770B1
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EP
European Patent Office
Prior art keywords
quadrilateral
upright
modification
articulated
spacer part
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.)
Expired - Lifetime
Application number
EP04356101A
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German (de)
French (fr)
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EP1488770A1 (en
Inventor
François Xavier Laffin
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.)
Lifestand "Vivre Debout"
Original Assignee
Lifestand "Vivre Debout"
Lifestand Vivre Debout
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Publication of EP1488770A1 publication Critical patent/EP1488770A1/en
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Publication of EP1488770B1 publication Critical patent/EP1488770B1/en
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Classifications

    • 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
    • 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
    • A61G5/1054—Large wheels, e.g. higher than the seat portion
    • 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
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion
    • 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
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1075—Arrangements for adjusting the seat tilting the whole seat backwards
    • 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
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • 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 wheelchairs, particularly but not exclusively, wheelchairs, which are used by the disabled and disabled and it aims, indifferently, wheelchairs, folding or not.
  • Such a position is not able to bring rehabilitation to everyday life and does not facilitate social contacts.
  • a sitting position maintained for relatively long periods of time, is responsible for physical degradation, such as loss of angular amplitude of the lower limbs, defective blood circulation, slowing of the digestive and intestinal functions, bone fragility, etc.
  • chairs whose frame supports an articulated structure comprising a backrest, a seat and a footrest.
  • Such a structure is mounted articulated by the seat on a horizontal front axis, perpendicular to the vertical plane of symmetry of the frame.
  • the articulated structure can be controlled with complete motorization or assistance, to move the seat from a lowering position to a vertical position and vice versa.
  • Such chairs are generally referred to as "standing or standing chairs”.
  • Requirement FR 2020453 also describes such a standing chair.
  • the articulated structure is composed of a seat element, a backrest element and a footrest element which must therefore be able to occupy relatively a general position of the seat or seat type and be placed in the extension of each other in the standing or standing position.
  • the articulated structure is constituted by two lateral symmetrical articulated systems each comprising a first deformable quadrilateral contributing to the support of the seat, composed of two bars, respectively upper and lower, articulated on the front part of a frame and linked to their rear part by a spacer.
  • Each lateral articulated system also comprises a second deformable quadrilateral contributing to the support of the footrest, and a backrest frame which is articulated on the first quadrilateral, opposite the second quadrilateral, via the room spacer at least and which comprises at least one integral amount of the spacer.
  • the chair comprises, finally, a maneuvering assembly, interposed between the side assemblies and the frame and assuming a function of controlling and controlling the relative pivoting of the lateral assemblies from a lowering position to a position of verticalization of the structure by compared to the chassis and vice versa.
  • this standing chair is characterized in that it further comprises means for automatically modifying the inclination of the backrest with respect to the vertical direction in the sagittal plane, between the lowering and lowering positions. verticalization.
  • the means for automatically modifying the inclination thus allow either a slight tilting of the backrest to the front during the transition to the vertical position, or, conversely, a slight tilting backwards during the passage from sitting to standing.
  • the automatic modification means can be made in any appropriate manner and, for example, include a system of connecting rods and references adapted to ensure this modification.
  • the means for automatically modifying the inclination comprise, for each lateral articulated system, the spacer and the first deformable quadrilateral which has a shape different from that of the parallelogram.
  • the means for automatically modifying the inclination of the backrest are adjustable, so as to allow a choice of the direction and / or the amplitude of the modification.
  • the modifying means are then, preferably but not necessarily, adjustable so as to have a neutral position in which the angle of the uprights, with respect to the vertical in the sagittal plane, is identical in the lowering position and in the verticalization.
  • the adjustable means for automatically modifying the inclination of the backrest act on the shape of the first deformable quadrilateral.
  • the implementation for the automatic modification of the inclination of the backrest of the shape of the first deformable quadrilateral, provides a simple device with a reduced weight.
  • the adjustable means for automatically modifying the inclination of the backrest comprise, for each articulated assembly, the spacer on which the backrest is adapted so as to form an identical angle with respect to the spacer, in a standing position and sitting position, and means for modifying the shape of the first deformable quadrilateral.
  • the spacer comprises at least two fixing positions for the corresponding hinge point of the lower bar of the first parallelogram.
  • the uprighting chair in order to allow a better adaptation of the uprighting chair to the morphology of its user, also comprises means for adjusting the angle of each upright relative to the room. corresponding spacing.
  • the means for adjusting the relative angle of the upright and the spacer can be made in any appropriate manner.
  • the means for adjusting the angle of the upright relative to the spacer comprise, for each upright, a pivot for fixing the upright on the articulation piece, allowing a rotational movement. the amount, between a position folded against the upper bar of the first quadrilateral or the seat of the chair and a raised position, and means for locking the upright in the raised position which are integral with the spacer and movable on the latter , so as to allow a modification continuous of the angle between the spacer and the upright in raised and locked position.
  • a standing chair according to the invention may comprise different types of propulsion means, such as electric drive wheel systems or, preferably, manually propelled wheels.
  • the Fig. 1 is a perspective of a wheelchair standing according to the invention.
  • the Fig. 2 is an elevation, in a right view, of the armchair shown in Fig. 1 when sitting or lowering the chair.
  • the Fig. 3 is a partial elevation, analogous to the Fig. 2 , from the chair in the standing or upright position.
  • the Fig. 4 is an elevation, analogous to the Fig. 2 without the drive wheel, further illustrating a means for automatically modifying the inclination of the backrest.
  • the Fig. 5 is a partial elevation, analogous to the Fig. 4 , showing, on a larger scale, means for adjusting the angle of the backrest relative to a part supporting it.
  • the Fig. 6 is a view, similar to the Fig. 4 , showing another embodiment of the adjustable means for automatically modifying the inclination of the backrest.
  • the aim of the invention is to allow an automatic modification of the inclination of the backrest on a wheelchair, as illustrated in FIGS. Fig. 1 to 3 , and designated as a whole by the reference 1 , to provide the best possible comfort for the wheelchair user.
  • Such a chair 1 comprises a frame 2 , composed of two lateral half-frames 3 and 4 , joined together by crosspieces 5 and 6 . These various constituent elements define a carrying frame provided with drive wheels 10 and steerable steerable wheels 11.
  • the frame 2 corresponds to a chair of rigid design, but it is obvious that a substantially similar conformation could be retained for a folding chair. Indeed, in such a case, the rigid sleepers 5 and 6 are then replaced by folding elements of known design.
  • the chassis 2 is equipped with a verticalizer device which is designed as an articulated structure 12 carried by the chassis 2 .
  • the articulated structure 12 is constituted by two lateral articulated systems 13 , symmetrical with respect to a sagittal plane P and which are more particularly visible to the Fig. 2 and 3 .
  • Each articulated system 13 is intended to be adapted laterally on the frame 2 , for example at each of the half-frames 3 and 4 .
  • Each articulated system 13 comprises a first deformable quadrilateral 17 consisting of two bars 18 and 19, respectively said upper and lower, although they are not arranged, in the illustrated representation Fig. 3 , in the same vertical plane.
  • the bars 18 and 19 are joined, by their posterior terminal part, by an element or a spacer 20, to which they are connected by pivots 20 1 , 20 2 .
  • the bars 18 and 19 are furthermore mounted on the frame 2, close to the front part of the latter, by a first articulation point 21 relating to the upper bar 18 and by a second articulation point 22 concerning the lower bar 19 .
  • the hinge point 21 is provided in the upper part of the corresponding half-frame 3 , 4 while the hinge point 22 is located on the same half-frame back and below the hinge point 21 .
  • the lower bars 19 and upper 16 and their respective hinge points 20 1 , 21, 2 , 22 define the long upper sides G S and lower G I , while the spacer 20 defines a small posterior side P P of the first quadrilateral and the articulation points 21, 22 on the front part of the frame defining a small anterior side P A , as is apparent from FIG. Fig. 4 .
  • Each articulated system 13 further comprises a second polygon and, according to the illustrated example, a second deformable quadrilateral 26 , shown diagrammatically in FIGS. Fig. 2 and 3 in dashed lines, connecting the first deformable quadrilateral to a jamb or upright 2 7 intended to support, alone or in combination with the leg or amount counterpart, a footrest 33.
  • Each articulated system 13 comprises, finally, a backrest frame comprising two uprights 35 , each articulated on the first quadrilateral 13 , opposite the second quadrilateral 26 , by means of the spacer 20 .
  • the backrest posts 35 are, moreover, connected by a crossmember 36 .
  • each articulated system further comprises an operating assembly 40 interposed between the first quadrilateral 17 and the frame 2 and, more particularly, the corresponding half-frame 4 .
  • Each operating assembly 40 comprises a first lever 41, articulated on the rear part of the chassis, via a pivot 42 and, at the end of a second lever 43, via a pivot 44 .
  • the other end of the second lever 43 is then articulated on the first quadrilateral and, in the example shown, the bottom bar 19 via a pivot 45 and a fixing part 46 integral with the second lever 43 .
  • Each maneuvering assembly also comprises an operating handle 49 which could be described as a multi-socket, to the extent that it must allow the user of the chair to apply a force on this handle, both in the context of the lowering position or seat illustrated in Fig. 2 , that in the cade of the verticalization position B illustrated in the Fig. 3 and during the transition phase or vertical-lowering movement.
  • an operating handle 49 which could be described as a multi-socket, to the extent that it must allow the user of the chair to apply a force on this handle, both in the context of the lowering position or seat illustrated in Fig. 2 , that in the cade of the verticalization position B illustrated in the Fig. 3 and during the transition phase or vertical-lowering movement.
  • the above-described standing chair also comprises assistance means 50 .
  • these assistance means are constituted, for each of the articulated systems, by a gas spring 6 , interposed between the first quadrilateral 13 and the front portion of the frame 2 .
  • each gas spring 50 also incorporates automatic locking means which prevent any movement of the spring and therefore of the articulated system which is linked thereto, as long as an unlocking command is not applied to the system spring lock.
  • the handle 49 disposed on the side of the dominant hand of the user, then comprises a control member acting on the locking means of the gas springs 50 .
  • the invention proposes to use means 60 for automatically modifying the inclination ⁇ of the backrest relative to the vertical.
  • means 60 for automatically modifying the inclination ⁇ of the backrest relative to the vertical.
  • the means 60 for automatically modifying the inclination of the backrest comprise, for each lateral articulated system, the spacer 20 on which the corresponding backrest post 35 is adapted to form, with said piece distance, an angle ⁇ which remains constant during the movements of the articulated structure.
  • the automatic modification means 60 further comprise the first deformable quadrilateral 17, composed of the two long sides G S , G I and small sides P B , P A.
  • the Applicant recommends adopting a shape different from that of the parallelogram for the first quadrilateral, in order to obtain such an automatic modification.
  • the shape chosen for the first deformable quadrilateral is adopted so that the long sides G S and G I have lengths L S and L I equal, while the length L A of the small front side P A is chosen to be greater than the length L P of the small posterior side P P.
  • This conformation of the first deformable quadrilateral then makes it possible to obtain a backward movement of the backrest during the transition from sitting to standing.
  • the small posterior side P P has a length greater than that of the small anterior side P A , the back will tend to incline forwards when the lowering position is moved to the vertical position.
  • the short side P P has a length less than that of the small front side P A , the back will tend to tilt backwards when passing from the lowering position to the vertical position.
  • the latter comprises, preferably but not strictly necessary, adjustment means 70 of the angle ⁇ between each file post 35 and the room d corresponding spacer 20.
  • the adjustment means 70 may be made in any suitable manner. According to the embodiment of the chair, illustrated and described above and as is apparent in more detail from the Fig. 5 , the adjustment means comprise, for each lateral articulated system, a pivot 71 for fixing the backrest post 35 on the spacer, so that the post 35 has, opposite its part 72 for supporting the backrest a locking segment 73 .
  • the backrest 35 Given its attachment via the pivot 71, the backrest 35 is then movable, between a position folded against the upper bar of the first deformable quadrilateral or the seat of the chair and a upright raised position of use of the chair verticalizer 1 .
  • the inclination adjusting means 70 then further comprise means for locking the upright 35 and, more particularly, its segment 73 in the raised position, so that the upright 35 is immobilized with respect to the 20 gauge.
  • the locking means comprise an integral finger 74 of the locking segment 73 and a sort of striker 75 , integral with the spacer 20, being movable relative to the latter, so as to allow, by its displacement, a modification , preferably continuous, of the angle ⁇ .
  • the striker can, for example, be mounted in a groove by being displaced in translation by means of an Archimedean screw.
  • the combination of the means 70 for adjusting the static inclination ⁇ of the upright 35 relative to the spacer 20 and the automatic modification means 60 of the inclination of the backrest, between the lowering position and the position of verticalization, allows then to offer optimal comfort to the user of the chair, allowing fine adjustments of inclination of the backrest and, in particular, by allowing search a recline for the backrest, both optimal sitting position and in standing position.
  • the adjustable means for automatic modification 60 of the inclination ⁇ of the backrest, between the sitting and standing positions are made by acting on the length L P of the small posterior side P P of the first deformable quadrilateral .
  • the adjustable automatic modification means 60 can be made by acting on another side of the deformable quadrilateral.
  • the Fig. 6 illustrates another embodiment according to which the means 60 for modifying the shape of the first adjustable quadrilateral consist of means for continuously modifying the length of the upper bar 18 of the first deformable quadrilateral.
  • These continuous modification means 60 are, according to the illustrated example, constituted by a ring 90 connecting two segments 91 , 92 constituting the bar 18 and connected to each of these segments by a thread, so that a rotation of the. ring, in one direction, allows an increase in the length L S of the upper segment 18 and, in the opposite direction, a reduction of the length L S of the upper segment 18.

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

Abstract

The wheelchair consists of a frame supporting an articulated structure comprising a seat base, a foot rest, a back and two symmetrical articulated systems at the sides, each made up of a deformable quadrilateral (17) with upper and lower bars, a deformable polygon and a spacer (20). It also includes an automatic mechanism (60) that modifies the angle of the seat back relative to the vertical in the saggital plane as it moves between seated and upright positions. The mechanism includes the spacer and deformable quadrilaterial, which has a shape other than a parallelogram, and it is adjustable to allow a selection of the direction of modification and/or the amplitude of modification.

Description

La présente invention concerne les fauteuils, plus particulièrement mais non exclusivement, roulants, qui sont utilisés par les handicapés et les invalides et elle vise, indifféremment, les fauteuils roulants, pliants ou non.The present invention relates to wheelchairs, particularly but not exclusively, wheelchairs, which are used by the disabled and disabled and it aims, indifferently, wheelchairs, folding or not.

Il est incontestable que les fauteuils roulants ont apporté une possibilité de mobilité aux handicapés et aux invalides. Ces fauteuils roulants possèdent, toutefois, plusieurs inconvénients tenant au fait que les utilisateurs ne peuvent occuper qu'une position assise, par ailleurs maintenue en général pendant des durées relativement longues.It is undeniable that wheelchairs have provided mobility opportunities for the disabled and the disabled. These wheelchairs have, however, several drawbacks due to the fact that users can only occupy a sitting position, otherwise maintained in general for relatively long periods.

Une telle position n'est pas à même d'apporter une réadaptation à la vie courante et ne facilite pas les contacts sociaux. En outre, une telle position assise, maintenue pendant des durées relativement longues, est responsable d'une dégradation physique, telle que perte d'amplitude angulaire des membres inférieurs, circulation sanguine défectueuse, ralentissement des fonctions digestives et intestinales, fragilité osseuse, etc.Such a position is not able to bring rehabilitation to everyday life and does not facilitate social contacts. In addition, such a sitting position, maintained for relatively long periods of time, is responsible for physical degradation, such as loss of angular amplitude of the lower limbs, defective blood circulation, slowing of the digestive and intestinal functions, bone fragility, etc.

Pour remédier aux inconvénients ci-dessus, il a été proposé des fauteuils dont le châssis supporte une structure articulée comprenant un dossier, une assise et un repose-pieds. Une telle structure est montée articulée par l'assise sur un axe frontal horizontal, perpendiculaire au plan de symétrie vertical du châssis. La structure articulée peut être commandée avec motorisation complète ou assistance, pour faire passer l'assise d'une position d'abaissement à une position de verticalisation et inversement. De tels fauteuils sont, généralement, qualifiés de « fauteuils verticalisateurs ou verticalisateurs ».To overcome the disadvantages above, it has been proposed chairs whose frame supports an articulated structure comprising a backrest, a seat and a footrest. Such a structure is mounted articulated by the seat on a horizontal front axis, perpendicular to the vertical plane of symmetry of the frame. The articulated structure can be controlled with complete motorization or assistance, to move the seat from a lowering position to a vertical position and vice versa. Such chairs are generally referred to as "standing or standing chairs".

Que la source de puissance, commandant ou permettant de commander la verticalisation et l'abaissement de la structure articulée, soit à base d'énergie électrique, de vérins élastiques, notamment à gaz, ou purement manuelle, les fauteuils du type ci-dessus ont certainement permis de résoudre, pour une grande partie, les inconvénients découlant de l'utilisation d'un fauteuil classique.Whether the source of power, controlling or allowing to control the verticalization and the lowering of the articulated structure, is based on electrical energy, elastic cylinders, in particular gas, or purely manual, the chairs of the type above have certainly allowed to solve, for a large part, the disadvantages arising from the use of a classic chair.

C'est certainement la raison du succès de tels fauteuils depuis déjà un certain nombre d'années. A titre de référence, il est possible de citer le brevet FR 2 529 456 qui est justement relatif à une telle conception de fauteuil verticalisateur.This is certainly the reason for the success of such chairs for a number of years already. For reference, it is possible to quote the FR 2 529 456 which is precisely relative to such a design of a standing chair.

La demande FR 2020453 décrit également un tel fauteuil verticalisateur.Requirement FR 2020453 also describes such a standing chair.

Bien que donnant satisfaction, de tels fauteuils ont, semble-t-il, fait naître une objection de confort tenant, notamment, à la nature de la structure articulée permettant d'élever ou d'abaisser, dans une position de sécurité maximale, le sujet invalide ou handicapé.Although giving satisfaction, such chairs seem to have given rise to a comfort objection relating, in particular, to the nature of the articulated structure. to raise or lower, in a position of maximum security, the invalid or disabled subject.

Il faut, en effet, tenir compte du caractère articulé de cette structure qui peut passer d'une position de siège traditionnel à une position de verticalisation ou de verticalisation dans laquelle les différents segments la constituant sont sensiblement alignés dans le prolongement les uns des autres, selon une direction pseudo-verticale.It is necessary, in fact, to take into account the articulated nature of this structure which can pass from a traditional seat position to a position of verticalization or verticalization in which the various segments constituting it are substantially aligned in the extension of each other, in a pseudo-vertical direction.

Pour répondre à l'exigence anatomique dans les différentes positions susceptibles d'être occupées, la structure articulée est composée d'un élément d'assise, d'un élément de dossier et d'un élément repose-pied qui doivent donc pouvoir occuper relativement une position générale du type siège ou assise et être placés dans le prolongement les uns des autres dans la position de verticalisation ou debout.To meet the anatomical requirement in the various positions that can be occupied, the articulated structure is composed of a seat element, a backrest element and a footrest element which must therefore be able to occupy relatively a general position of the seat or seat type and be placed in the extension of each other in the standing or standing position.

Afin de permettre ce mouvement de verticalisation-abaissement, la structure articulée est constituée par deux systèmes articulés symétriques latéraux comprenant chacun un premier quadrilatère déformable contribuant au support de l'assise, composé de deux barres, respectivement supérieure et inférieure, articulées sur la partie antérieure d'un châssis et liées vers leur partie arrière par une pièce d'écartement. Chaque système articulé latéral comprend, également, un second quadrilatère déformable contribuant au support du repose-pied, ainsi qu'une armature de dossier qui est articulée sur le premier quadrilatère, à l'opposé du second quadrilatère, par l'intermédiaire de la pièce d'écartement au moins et qui comprend au moins un montant solidaire de la pièce d'écartement.In order to allow this vertical-lowering movement, the articulated structure is constituted by two lateral symmetrical articulated systems each comprising a first deformable quadrilateral contributing to the support of the seat, composed of two bars, respectively upper and lower, articulated on the front part of a frame and linked to their rear part by a spacer. Each lateral articulated system also comprises a second deformable quadrilateral contributing to the support of the footrest, and a backrest frame which is articulated on the first quadrilateral, opposite the second quadrilateral, via the room spacer at least and which comprises at least one integral amount of the spacer.

Le fauteuil comprend, enfin, un ensemble de manoeuvre, interposé entre les ensembles latéraux et le châssis et assumant une fonction de commande et de contrôle du pivotement relatif des ensembles latéraux d'une position d'abaissement à une position de verticalisation de la structure par rapport au châssis et inversement.The chair comprises, finally, a maneuvering assembly, interposed between the side assemblies and the frame and assuming a function of controlling and controlling the relative pivoting of the lateral assemblies from a lowering position to a position of verticalization of the structure by compared to the chassis and vice versa.

Jusqu'à présent, il a été considéré que, dans la majorité des cas, le confort de l'utilisateur pouvait être assuré en conférant au dossier une inclinaison par rapport à la verticale, identique en position d'abaissement ou assise et en position de verticalisation ou debout. Les systèmes latéraux articulés ont donc été conçus de manière à conserver l'inclinaison du dossier tout au long du déplacement.Until now, it has been considered that, in the majority of cases, the comfort of the user could be ensured by giving the backrest an inclination relative to the vertical, identical in the lowering or sitting position and in the position of standing or standing. The articulated side systems have been designed to maintain the inclination of the backrest throughout the movement.

Cependant, il est apparu que, dans certains cas, selon la morphologie ou la pathologie de l'utilisateur, il était nécessaire de pouvoir adopter une inclinaison différente en position verticalisée et en position assise.However, it appeared that in some cases, depending on the morphology or the pathology of the user, it was necessary to be able to adopt a different inclination in the vertical position and sitting position.

A cet effet, il a été proposé des moyens de réglage à commande manuelle et, le plus souvent, à motorisation électrique permettant de modifier à volonté l'inclinaison du dossier.For this purpose, it has been proposed manual control means and, most often, electric motor for changing at will the inclination of the folder.

Cependant, de tels moyens de réglage de l'inclinaison à commande manuelle sont d'un usage fastidieux, dans la mesure où, à chaque changement de position, l'utilisateur du fauteuil doit corriger l'inclinaison du dossier.However, such manual control tilt adjustment means are tedious, since, at each change of position, the wheelchair user must correct the inclination of the backrest.

Ainsi, il apparaît le besoin d'éviter, autant que faire se peut, les phases de réglages à répétition et fastidieuses.Thus, it appears the need to avoid, as far as possible, the phases of adjustments and repetitive tedious.

Afin de remplir cet objectif, l'invention concerne un fauteuil verticalisateur pour handicapés et invalides, selon les revendications 1 à 10, comprenant un châssis supportant une structure articulée comprenant une assise, un repose-pied, un dossier et deux systèmes articulés symétriques latéraux comprenant chacun :

  • ■ un premier quadrilatère déformable contribuant au support de l'assise, composé de deux barres, respectivement supérieure et inférieure, définissant les grands côtés du quadrilatère, articulées sur la partie antérieure du châssis définissant un petit côté antérieur du quadrilatère et liées, vers leurs parties arrière, par une pièce d'écartement définissant un petit côté postérieur du parallélogramme,
  • ■ un second polygone déformable, contribuant au support du repose-pied,
  • ■ une armature de dossier qui est articulée sur le premier quadrilatère, à l'opposé du second polygone, par l'intermédiaire de la pièce d'écartement au moins et qui comprend au moins un montant solidaire de la pièce d'écartement,
  • ■ et un ensemble de manoeuvre, interposé entre l'ensemble latéral et le châssis, assumant une fonction de commande et de contrôle du pivotement relatif des systèmes latéraux, d'une position d'abaissement ou assise à une position de verticalisation ou debout de la structure par rapport au châssis et inversement.
In order to fulfill this purpose, the invention relates to a chair for disabled and disabled, according to claims 1 to 10, comprising a frame supporting an articulated structure comprising a seat, a footrest, a backrest and two lateral symmetrical articulated systems comprising each :
  • ■ a first deformable quadrilateral contributing to the support of the seat, consisting of two bars, respectively upper and lower, defining the long sides of the quadrilateral articulated on the front part of the frame defining a small anterior side of the quadrilateral and linked to their parts rear, by a spacer defining a small posterior side of the parallelogram,
  • ■ a second deformable polygon, contributing to the support of the footrest,
  • ■ a backrest frame which is articulated on the first quadrilateral, opposite the second polygon, through the spacer at least and which comprises at least one integral amount of the spacer,
  • And a maneuvering assembly, interposed between the lateral assembly and the chassis, assuming a function of control and control of the relative pivoting of the lateral systems, of a lowering position or sitting at a position of verticalization or standing of the structure relative to the chassis and vice versa.

Selon l'invention, ce fauteuil verticalisateur est caractérisé en ce qu'il comprend, en outre, des moyens de modification automatique de l'inclinaison du dossier par rapport à la direction verticale dans le plan sagittal, entre les positions d'abaissement et de verticalisation.According to the invention, this standing chair is characterized in that it further comprises means for automatically modifying the inclination of the backrest with respect to the vertical direction in the sagittal plane, between the lowering and lowering positions. verticalization.

Selon l'invention, les moyens de modification automatique de l'inclinaison permettent ainsi, soit un léger basculement du dossier vers l'avant lors du passage en position de verticalisation, soit, au contraire, un léger basculement vers l'arrière lors du passage de la position assise à la position debout.According to the invention, the means for automatically modifying the inclination thus allow either a slight tilting of the backrest to the front during the transition to the vertical position, or, conversely, a slight tilting backwards during the passage from sitting to standing.

Selon l'invention, les moyens de modification automatique peuvent être réalisés de toute façon appropriée et, par exemple, comprendre un système de bielles et de renvois adaptés pour assurer cette modification.According to the invention, the automatic modification means can be made in any appropriate manner and, for example, include a system of connecting rods and references adapted to ensure this modification.

Selon une forme préférée de réalisation de l'invention, les moyens de modification automatique de l'inclinaison comprennent, pour chaque système articulé latéral, la pièce d'écartement et le premier quadrilatère déformable qui présente une forme différente de celle du parallélogramme.According to a preferred embodiment of the invention, the means for automatically modifying the inclination comprise, for each lateral articulated system, the spacer and the first deformable quadrilateral which has a shape different from that of the parallelogram.

Selon l'invention, les moyens de modification automatique de l'inclinaison du dossier sont réglables, de manière à permettre un choix du sens et/ou de l'amplitude de la modification.According to the invention, the means for automatically modifying the inclination of the backrest are adjustable, so as to allow a choice of the direction and / or the amplitude of the modification.

Les moyens de modification sont alors, de préférence mais non nécessairement, réglables de manière à présenter une position neutre dans laquelle l'angle des montants, par rapport à la verticale dans le plan sagittal, est identique en position d'abaissement et en position de verticalisation.The modifying means are then, preferably but not necessarily, adjustable so as to have a neutral position in which the angle of the uprights, with respect to the vertical in the sagittal plane, is identical in the lowering position and in the verticalization.

Les moyens réglables de modification automatique de l'inclinaison du dossier agissent sur la forme du premier quadrilatère déformable.The adjustable means for automatically modifying the inclination of the backrest act on the shape of the first deformable quadrilateral.

A cet égard, il doit être remarqué que la mise en oeuvre, pour la modification automatique de l'inclinaison du dossier de la forme du premier quadrilatère déformable, permet d'obtenir un dispositif simple, présentant un poids réduit.In this respect, it should be noted that the implementation, for the automatic modification of the inclination of the backrest of the shape of the first deformable quadrilateral, provides a simple device with a reduced weight.

Selon encore une autre caractéristique de l'invention, les moyens réglables de modification automatique de l'inclinaison du dossier comprennent, pour chaque ensemble articulé, la pièce d'écartement sur laquelle le dossier est adapté de manière à former un angle identique par rapport à la pièce d'écartement, en position debout et en position assise, et des moyens de modification de la forme du premier quadrilatère déformable.According to yet another characteristic of the invention, the adjustable means for automatically modifying the inclination of the backrest comprise, for each articulated assembly, the spacer on which the backrest is adapted so as to form an identical angle with respect to the spacer, in a standing position and sitting position, and means for modifying the shape of the first deformable quadrilateral.

De manière préférée mais non strictement nécessaire, les moyens de modification automatique permettent alors de choisir la forme du premier quadrilatère parmi au moins les trois formes suivantes :

  • ■ parallélogramme,
  • ■ quadrilatère dont les grands côtés possèdent la même longueur, tandis que le petit côté antérieur possède une longueur supérieure à celle du petit côté postérieur,
  • ■ quadrilatère dont les grands côtés possèdent la même longueur, tandis que le petit côté postérieur possède une longueur supérieure à celle du petit côté antérieur.
Preferably, but not strictly necessary, the automatic modification means then make it possible to choose the shape of the first quadrilateral from at least the three following forms:
  • ■ parallelogram,
  • ■ quadrilateral whose long sides have the same length, while the small anterior side has a length greater than that of the small posterior side,
  • ■ quadrilateral whose long sides have the same length, while the small posterior side has a length greater than that of the small anterior side.

Selon une forme préférée de réalisation et afin de permettre une telle modification de la forme du premier quadrilatère déformable, la pièce d'écartement comprend au moins deux positions de fixation pour le point d'articulation correspondant de la barre inférieure du premier parallélogramme.According to a preferred embodiment and to allow such a modification of the shape of the first deformable quadrilateral, the spacer comprises at least two fixing positions for the corresponding hinge point of the lower bar of the first parallelogram.

De manière préférée, la pièce d'écartement comprend trois positions pour le point d'articulation de la barre inférieure, conférant ainsi au premier quadrilatère déformable, respectivement, la forme :

  • ■ d'un parallélogramme,
  • ■ d'un quadrilatère dont le petit côté antérieur possède une longueur supérieure à celle du petit côté postérieur,
  • ■ d'un quadrilatère dont le petit côté postérieur possède une longueur supérieure à celle du petit côté antérieur.
Preferably, the spacer comprises three positions for the point of articulation of the lower bar, thus conferring on the first deformable quadrilateral, respectively, the shape:
  • ■ a parallelogram,
  • ■ a quadrilateral whose small anterior side has a length greater than that of the small posterior side,
  • ■ a quadrilateral whose small posterior side has a length greater than that of the small anterior side.

Selon une autre caractéristique de l'invention, afin de permettre une meilleure adaptation du fauteuil verticalisateur à la morphologie de son utilisateur, le fauteuil verticalisateur comprend, également, des moyens de réglage de l'angle de chaque montant par rapport à la pièce d'écartement correspondante.According to another characteristic of the invention, in order to allow a better adaptation of the uprighting chair to the morphology of its user, the uprighting chair also comprises means for adjusting the angle of each upright relative to the room. corresponding spacing.

Les moyens de réglage de l'angle relatif du montant et de la pièce d'écartement peuvent être réalisés de toute façon appropriée.The means for adjusting the relative angle of the upright and the spacer can be made in any appropriate manner.

Selon une caractéristique de l'invention, les moyens de réglage de l'angle du montant par rapport à la pièce d'écartement comprennent, pour chaque montant, un pivot de fixation du montant sur la pièce d'articulation, autorisant un mouvement de rotation du montant, entre une position rabattue contre la barre supérieure du premier quadrilatère ou l'assise du fauteuil et une position relevée, ainsi que des moyens de verrouillage du montant en position relevée qui sont solidaires de la pièce d'écartement et mobiles sur cette dernière, de manière à permettre une modification continue de l'angle entre la pièce d'écartement et le montant en position relevée et verrouillée.According to one characteristic of the invention, the means for adjusting the angle of the upright relative to the spacer comprise, for each upright, a pivot for fixing the upright on the articulation piece, allowing a rotational movement. the amount, between a position folded against the upper bar of the first quadrilateral or the seat of the chair and a raised position, and means for locking the upright in the raised position which are integral with the spacer and movable on the latter , so as to allow a modification continuous of the angle between the spacer and the upright in raised and locked position.

Par ailleurs, un fauteuil verticalisateur selon l'invention peut comprendre différents types de moyens de propulsion, tels que des systèmes de roues motrices électriques ou, de préférence, des roues à propulsion manuelle.Furthermore, a standing chair according to the invention may comprise different types of propulsion means, such as electric drive wheel systems or, preferably, manually propelled wheels.

Diverses autres caractéristiques de l'invention ressortent de la description ci-dessous, effectuée en référence aux dessins annexés qui illustrent différentes formes, non limitatives, de réalisation d'un fauteuil verticalisateur selon l'invention et possédant des moyens de modification automatique de l'inclinaison du dossier..Various other characteristics of the invention appear from the description below, made with reference to the accompanying drawings which illustrate various forms, non-limiting, of making a standing chair according to the invention and having means for automatically modifying the tilting of the back ..

La fig. 1 est une perspective d'un fauteuil verticalisateur roulant selon l'invention.The Fig. 1 is a perspective of a wheelchair standing according to the invention.

La fig. 2 est une élévation, en vue de droite, du fauteuil illustré à la fig. 1 , en position assise ou d'abaissement du fauteuil.The Fig. 2 is an elevation, in a right view, of the armchair shown in Fig. 1 when sitting or lowering the chair.

La fig. 3 est une élévation partielle, analogue à la fig. 2 , du fauteuil en position de verticalisation ou debout.The Fig. 3 is a partial elevation, analogous to the Fig. 2 , from the chair in the standing or upright position.

La fig. 4 est une élévation, analogue à la fig. 2 sans la roue motrice, illustrant plus en détail un moyen de modification automatique de l'inclinaison du dossier.The Fig. 4 is an elevation, analogous to the Fig. 2 without the drive wheel, further illustrating a means for automatically modifying the inclination of the backrest.

La fig. 5 est une élévation partielle, analogue à la fig. 4 , montrant, à plus grande échelle, des moyens de réglage de l'angle du dossier par rapport à une pièce le supportant.The Fig. 5 is a partial elevation, analogous to the Fig. 4 , showing, on a larger scale, means for adjusting the angle of the backrest relative to a part supporting it.

La fig. 6 est une vue, analogue à la fig. 4 , montrant une autre forme de réalisation des moyens réglables de modification automatique de l'inclinaison du dossier.The Fig. 6 is a view, similar to the Fig. 4 , showing another embodiment of the adjustable means for automatically modifying the inclination of the backrest.

L'invention vise à permettre une modification automatique de l'inclinaison du dossier sur un fauteuil verticalisateur roulant, tel qu'illustré aux fig. 1 à 3 , et désigné dans son ensemble par la référence 1, afin d'offrir le meilleur confort possible à l'utilisateur du fauteuil.The aim of the invention is to allow an automatic modification of the inclination of the backrest on a wheelchair, as illustrated in FIGS. Fig. 1 to 3 , and designated as a whole by the reference 1 , to provide the best possible comfort for the wheelchair user.

Un tel fauteuil 1 comprend un châssis 2, composé de deux demi-châssis latéraux 3 et 4, réunis entre eux par des traverses 5 et 6. Ces différents éléments constitutifs définissent une armature porteuse pourvue de roues motrices 10 et de roues directrices orientables 11. Such a chair 1 comprises a frame 2 , composed of two lateral half-frames 3 and 4 , joined together by crosspieces 5 and 6 . These various constituent elements define a carrying frame provided with drive wheels 10 and steerable steerable wheels 11.

Tel qu'illustré, le châssis 2 correspond à un fauteuil de conception rigide, mais il est bien évident qu'une conformation sensiblement analogue pourrait être retenue pour un fauteuil repliable. En effet, dans un tel cas, les traverses rigides 5 et 6 sont alors remplacées par des éléments pliants de conception connue en soi.As illustrated, the frame 2 corresponds to a chair of rigid design, but it is obvious that a substantially similar conformation could be retained for a folding chair. Indeed, in such a case, the rigid sleepers 5 and 6 are then replaced by folding elements of known design.

Le châssis 2, décrit ci-dessus, est équipé d'un dispositif verticalisateur qui est réalisé sous la forme d'une structure articulée 12 portée par le châssis 2. La structure articulée 12 est constituée par deux systèmes articulés latéraux 13, symétriques par rapport à un plan sagittal P et qui sont plus particulièrement visibles aux fig. 2 et 3 . Chaque système articulé 13 est destiné à être adapté latéralement sur le châssis 2, par exemple au niveau de chacun des demi-châssis 3 et 4.The chassis 2 , described above, is equipped with a verticalizer device which is designed as an articulated structure 12 carried by the chassis 2 . The articulated structure 12 is constituted by two lateral articulated systems 13 , symmetrical with respect to a sagittal plane P and which are more particularly visible to the Fig. 2 and 3 . Each articulated system 13 is intended to be adapted laterally on the frame 2 , for example at each of the half-frames 3 and 4 .

Chaque système articulé 13comprend un premier quadrilatère déformable 17 constitué de deux barres 18 et 19, respectivement dite supérieure et inférieure, bien qu'elles ne soient pas disposées, dans la représentation illustrée fig. 3 , dans un même plan vertical. Les barres 18 et 19 sont réunies, par leur partie terminale postérieure, par un élément ou une pièce d'écartement 20, à laquelle elles sont reliées par des pivots 201, 202. Les barres 18 et 19 sont, en outre, montées sur le châssis 2, à proximité de la partie frontale de ce dernier, par un premier point d'articulation 21 concernant la barre supérieure 18 et par un second point d'articulation 22 concernant la barre inférieure 19. Dans le cas présent, le point d'articulation 21 est prévu en partie supérieure du demi-châssis correspondant 3, 4 alors que le point d'articulation 22 est situé sur ce même demi-châssis en arrière et dessous le point d'articulation 21.Each articulated system 13 comprises a first deformable quadrilateral 17 consisting of two bars 18 and 19, respectively said upper and lower, although they are not arranged, in the illustrated representation Fig. 3 , in the same vertical plane. The bars 18 and 19 are joined, by their posterior terminal part, by an element or a spacer 20, to which they are connected by pivots 20 1 , 20 2 . The bars 18 and 19 are furthermore mounted on the frame 2, close to the front part of the latter, by a first articulation point 21 relating to the upper bar 18 and by a second articulation point 22 concerning the lower bar 19 . In this case, the hinge point 21 is provided in the upper part of the corresponding half-frame 3 , 4 while the hinge point 22 is located on the same half-frame back and below the hinge point 21 .

Ainsi, les barres inférieures 19 et supérieures 16 et leurs points d'articulation respectifs 201, 21, 202, 22 définissent les grands côtés supérieurs GS et inférieurs GI, tandis que la pièce d'écartement 20 définit un petit côté postérieur PP du premier quadrilatère et les points d'articulation 21, 22 sur la partie antérieure du châssis définissant un petit côté antérieur PA, comme cela ressort de la fig. 4 . Thus, the lower bars 19 and upper 16 and their respective hinge points 20 1 , 21, 2 , 22 define the long upper sides G S and lower G I , while the spacer 20 defines a small posterior side P P of the first quadrilateral and the articulation points 21, 22 on the front part of the frame defining a small anterior side P A , as is apparent from FIG. Fig. 4 .

Chaque système articulé 13 comprend, en outre, un second polygone et, selon l'exemple illustré, un second quadrilatère déformable 26, schématisé aux fig. 2 et 3 en traits mixtes, reliant le premier quadrilatère déformable à un jambage ou montant 27 destiné à supporter, seul ou en combinaison avec le jambage ou montant homologue, un repose-pied 33.Each articulated system 13 further comprises a second polygon and, according to the illustrated example, a second deformable quadrilateral 26 , shown diagrammatically in FIGS. Fig. 2 and 3 in dashed lines, connecting the first deformable quadrilateral to a jamb or upright 2 7 intended to support, alone or in combination with the leg or amount counterpart, a footrest 33.

Chaque système articulé 13 comprend, enfin, une armature de dossier comprenant deux montants 35, chacun articulé sur le premier quadrilatère 13, à l'opposé du second quadrilatère 26, par l'intermédiaire de la pièce d'écartement 20. Selon l'exemple illustré, les montants de dossier 35 sont, par ailleurs, reliés par une traverse 36.Each articulated system 13 comprises, finally, a backrest frame comprising two uprights 35 , each articulated on the first quadrilateral 13 , opposite the second quadrilateral 26 , by means of the spacer 20 . According to the illustrated example, the backrest posts 35 are, moreover, connected by a crossmember 36 .

Afin de permettre un passage de la structure articulée 12 de la position d'abaissement assise, telle qu'illustrée à la fig. 2 , à la position de verticalisation ou debout, telle qu'illustrée à la fig. 3 , chaque système articulé comprend, en outre, un ensemble de manoeuvre 40, interposé entre le premier quadrilatère 17 et le châssis 2 et, plus particulièrement, le demi-châssis 4 correspondant.In order to allow passage of the articulated structure 12 from the sitting down position, as illustrated in FIG. Fig. 2 , in the standing or standing position, as shown in Fig. 3 each articulated system further comprises an operating assembly 40 interposed between the first quadrilateral 17 and the frame 2 and, more particularly, the corresponding half-frame 4 .

Chaque ensemble de manoeuvre 40 comprend un premier levier 41, articulé sur la partie arrière du châssis, par l'intermédiaire d'un pivot 42 et, à l'extrémité d'un second levier 43, par l'intermédiaire d'un pivot 44. L'autre extrémité du second levier 43 est alors articulée sur le premier quadrilatère et, selon l'exemple illustré, sur la barre inférieure 19, par l'intermédiaire d'un pivot 45 et d'une pièce de fixation 46 solidaire du second levier 43.Each operating assembly 40 comprises a first lever 41, articulated on the rear part of the chassis, via a pivot 42 and, at the end of a second lever 43, via a pivot 44 . the other end of the second lever 43 is then articulated on the first quadrilateral and, in the example shown, the bottom bar 19 via a pivot 45 and a fixing part 46 integral with the second lever 43 .

Chaque ensemble de manoeuvre comprend, également, une poignée de manoeuvre 49 qui pourrait être qualifiée de multiprises, dans la mesure où elle doit permettre, à l'utilisateur du fauteuil, d'appliquer un effort sur cette poignée, tant dans le cadre de la position d'abaissement ou assise illustrée à la fig. 2 , que dans le cade de la position de verticalisation B illustrée à la fig. 3 et pendant la phase de transition ou mouvement de verticalisation-abaissement.Each maneuvering assembly also comprises an operating handle 49 which could be described as a multi-socket, to the extent that it must allow the user of the chair to apply a force on this handle, both in the context of the lowering position or seat illustrated in Fig. 2 , that in the cade of the verticalization position B illustrated in the Fig. 3 and during the transition phase or vertical-lowering movement.

Afin de faciliter le mouvement de verticalisation-abaissement, le fauteuil verticalisateur décrit précédemment comprend, également, des moyens d'assistance 50. Selon cet exemple, ces moyens d'assistance sont constitués, pour chacun des systèmes articulés, par un ressort à gaz 6, interposé entre le premier quadrilatère 13 et la partie avant du châssis 2.In order to facilitate the vertical-lowering movement, the above-described standing chair also comprises assistance means 50 . According to this example, these assistance means are constituted, for each of the articulated systems, by a gas spring 6 , interposed between the first quadrilateral 13 and the front portion of the frame 2 .

Selon l'exemple illustré, chaque ressort à gaz 50 intègre, également, des moyens de blocage automatique qui empêchent tout mouvement du ressort et donc du système articulé qui lui est lié, tant qu'une commande de déblocage n'est pas appliquée au système de blocage du ressort. La poignée 49, disposée du côté de la main dominante de l'utilisateur, comprend alors un organe de commande agissant sur les moyens de blocage des ressorts à gaz 50.According to the illustrated example, each gas spring 50 also incorporates automatic locking means which prevent any movement of the spring and therefore of the articulated system which is linked thereto, as long as an unlocking command is not applied to the system spring lock. The handle 49, disposed on the side of the dominant hand of the user, then comprises a control member acting on the locking means of the gas springs 50 .

Par la mise en oeuvre des ensembles de manoeuvre et des ressorts à gaz 50, l'utilisateur du fauteuil a donc la possibilité de passer, alternativement, d'une position assise à une position debout, en fonction de ses besoins.By the use of operating assemblies and gas springs 50, the user of the chair has the opportunity to switch, alternately, from a sitting position to a standing position, according to his needs.

Afin de garantir un confort optimal à l'utilisateur, l'invention propose de mettre en oeuvre des moyens 60 permettant de modifier automatiquement l'inclinaison β du dossier par rapport à la verticale. Ainsi, il sera par exemple possible d'adopter une position légèrement inclinée vers l'avant ou l'arrière du dossier, en position d'abaissement, tandis que le dossier adoptera, automatiquement, une position, par exemple mais non exclusivement, sensiblement verticale en position de verticalisation ou debout de la structure, afin de conférer une orientation satisfaisante au buste de l'utilisateur en position debout.In order to guarantee optimum comfort for the user, the invention proposes to use means 60 for automatically modifying the inclination β of the backrest relative to the vertical. Thus, it will for example be possible to adopt a slightly inclined position towards the front or back of the backrest, in the lowering position, while the backrest will automatically adopt a position, for example but not exclusively, substantially vertical in standing or standing position of the structure, to give a satisfactory orientation to the bust of the user standing.

Cette modification automatique de l'orientation du dossier peut être assurée de différentes manières.This automatic modification of the orientation of the file can be ensured in different ways.

Selon l'exemple illustré, les moyens 60 de modification automatique de l'inclinaison du dossier comprennent, pour chaque système articulé latéral, la pièce d'écartement 20 sur laquelle le montant de dossier 35 correspondant est adapté de manière à former, avec ladite pièce d'écartement, un angle α qui reste constant au cours des déplacements de la structure articulée. Les moyens de modification automatique 60 comprennent, en outre, le premier quadrilatère déformable 17, composé des deux grands côtés GS, GI et des petits côtés PB, PA . Afin de permettre une modification automatique de l'inclinaison β du dossier ou des montants 35 par rapport à la verticale V, la demanderesse a eu le mérite de mettre en évidence qu'une légère modification du quadrilatère déformable 17 par rapport au parallélogramme parfait, permettait d'obtenir une variation de l'inclinaison β entre les positions d'abaissement ou assise et la position de verticalisation ou debout de la structure articulée.According to the illustrated example, the means 60 for automatically modifying the inclination of the backrest comprise, for each lateral articulated system, the spacer 20 on which the corresponding backrest post 35 is adapted to form, with said piece distance, an angle α which remains constant during the movements of the articulated structure. The automatic modification means 60 further comprise the first deformable quadrilateral 17, composed of the two long sides G S , G I and small sides P B , P A. In order to allow an automatic modification of the inclination β of the backrest or of the uprights 35 with respect to the vertical V, the applicant had the merit of highlighting that a slight modification of the deformable quadrilateral 17 with respect to the perfect parallelogram, allowed to obtain a variation of the inclination β between the lowering or sitting positions and the standing or standing position of the articulated structure.

Ainsi, la demanderesse préconise d'adopter une forme différente de celle du parallélogramme pour le premier quadrilatère, afin d'obtenir une telle modification automatique.Thus, the Applicant recommends adopting a shape different from that of the parallelogram for the first quadrilateral, in order to obtain such an automatic modification.

Selon l'exemple illustré, la forme choisie pour le premier quadrilatère déformable est adoptée de manière que les grands côtés GS et GI présentent des longueurs LS et LI égales, tandis que la longueur LA du petit côté antérieur PA est choisie de manière à être supérieure à la longueur LP du petit côté postérieur PP. Cette conformation du premier quadrilatère déformable permet alors d'obtenir un déplacement vers l'arrière du dossier lors du passage de la position assise à la position debout.According to the illustrated example, the shape chosen for the first deformable quadrilateral is adopted so that the long sides G S and G I have lengths L S and L I equal, while the length L A of the small front side P A is chosen to be greater than the length L P of the small posterior side P P. This conformation of the first deformable quadrilateral then makes it possible to obtain a backward movement of the backrest during the transition from sitting to standing.

Selon l'exemple illustré, les moyens 60 de modification automatique sont réglables et il est possible de choisir trois longueurs différentes pour le petit côté postérieur PP du quadrilatère. A cet effet, la pièce d'écartement présente trois alésages 61 qui sont disposés en triangle et qui permettent de choisir la forme du premier quadrilatère déformable parmi les trois formes suivantes :

  • ■ parallélogramme,
  • ■ côté postérieur PP ayant une longueur LP supérieure à celle LA du petit côté antérieur PA ,
  • ■ petit côté postérieur PP ayant une longueur LP inférieure à celle LA du petit côté antérieur PA .
According to the illustrated example, the automatic modification means 60 are adjustable and it is possible to choose three different lengths for the small posterior side P P of the quadrilateral. For this purpose, the spacer has three bores 61 which are arranged in a triangle and which make it possible to choose the shape of the first deformable quadrilateral from the following three forms:
  • ■ parallelogram,
  • ■ posterior side P P having a length L P greater than that L A of the small anterior side P A ,
  • A small posterior side P P having a length L P less than that L A of the small anterior side P A.

Le choix de la forme parallélogramme correspond, alors, à un réglage neutre pour lequel l'amplitude de modification de l'inclinaison du dossier entre les positions d'abaissement et de verticalisation est nulle; ce dernier conservant la même inclinaison β.The choice of the parallelogram shape corresponds, then, to a neutral setting for which the amplitude of modification of the inclination of the backrest between the lowering and verticalization positions is zero; the latter retaining the same inclination β .

En revanche, lorsque le petit côté postérieur PP présente une longueur supérieure à celle du petit côté antérieur PA , le dossier tendra à s'incliner vers l'avant lors du passage de la position d'abaissement à la position de verticalisation. Au contraire, lorsque le petit côté PP présente une longueur inférieure à celle du petit côté antérieur PA , le dossier tendra à s'incliner vers l'arrière lors du passage de la position d'abaissement à la position de verticalisation.On the other hand, when the small posterior side P P has a length greater than that of the small anterior side P A , the back will tend to incline forwards when the lowering position is moved to the vertical position. On the contrary, when the short side P P has a length less than that of the small front side P A , the back will tend to tilt backwards when passing from the lowering position to the vertical position.

Toujours dans le sens d'un meilleur confort pour l'utilisateur du fauteuil verticalisateur 1, ce dernier comprend, de manière préférée mais non strictement nécessaire, des moyens de réglage 70 de l'angle α entre chaque montant de dossier 35 et la pièce d'écartement 20 correspondante.Still in the sense of a better comfort for the user of the upright chair 1 , the latter comprises, preferably but not strictly necessary, adjustment means 70 of the angle α between each file post 35 and the room d corresponding spacer 20.

Les moyens de réglage 70 peuvent être réalisés de toute façon appropriée. Selon la forme de réalisation du fauteuil, illustrée et décrite précédemment et comme cela ressort plus en détail de la fig. 5 , les moyens de réglage comprennent, pour chaque système articulé latéral, un pivot 71 de fixation du montant de dossier 35 sur la pièce d'écartement, de manière que le montant 35 présente, à l'opposé de sa partie 72 de support du dossier, un segment 73 de verrouillage.The adjustment means 70 may be made in any suitable manner. According to the embodiment of the chair, illustrated and described above and as is apparent in more detail from the Fig. 5 , the adjustment means comprise, for each lateral articulated system, a pivot 71 for fixing the backrest post 35 on the spacer, so that the post 35 has, opposite its part 72 for supporting the backrest a locking segment 73 .

Compte tenu de sa fixation par l'intermédiaire du pivot 71, le montant de dossier 35 est alors mobile, entre une position rabattue contre la barre supérieure du premier quadrilatère déformable ou l'assise du fauteuil verticalisateur et une position relevée d'utilisation du fauteuil verticalisateur 1.Given its attachment via the pivot 71, the backrest 35 is then movable, between a position folded against the upper bar of the first deformable quadrilateral or the seat of the chair and a upright raised position of use of the chair verticalizer 1 .

Les moyens de réglage de l'inclinaison 70 comprennent alors, en outre, des moyens de verrouillage du montant 35 et, plus particulièrement, de son segment 73 en position relevée, de manière que le montant 35 se trouve immobilisé par rapport à la pièce d'écartement 20. Les moyens de verrouillage comprennent un doigt solidaire 74 du segment de verrouillage 73 et une sorte de gâche 75, solidaire de la pièce d'écartement 20, en étant mobile par rapport à cette dernière, de manière à permettre, par son déplacement, une modification, de préférence continue, de l'angle α. A cet effet, la gâche peut, par exemple, être montée dans une rainure en étant déplacée en translation au moyen d'une vis d'Archimède.The inclination adjusting means 70 then further comprise means for locking the upright 35 and, more particularly, its segment 73 in the raised position, so that the upright 35 is immobilized with respect to the 20 gauge. The locking means comprise an integral finger 74 of the locking segment 73 and a sort of striker 75 , integral with the spacer 20, being movable relative to the latter, so as to allow, by its displacement, a modification , preferably continuous, of the angle α. For this purpose, the striker can, for example, be mounted in a groove by being displaced in translation by means of an Archimedean screw.

L'association des moyens 70 de réglage de l'inclinaison statique α du montant 35 par rapport à la pièce d'écartement 20 et des moyens de modification automatique 60 de l'inclinaison du dossier, entre la position d'abaissement et la position de verticalisation, permet alors d'offrir un confort optimal à l'utilisateur du fauteuil, en autorisant des réglages fins d'inclinaison du dossier et, notamment, en permettant de recherche une inclinaison pour le dossier, à la fois optimale en position assise et en position debout.The combination of the means 70 for adjusting the static inclination α of the upright 35 relative to the spacer 20 and the automatic modification means 60 of the inclination of the backrest, between the lowering position and the position of verticalization, allows then to offer optimal comfort to the user of the chair, allowing fine adjustments of inclination of the backrest and, in particular, by allowing search a recline for the backrest, both optimal sitting position and in standing position.

Selon l'exemple de réalisation décrit précédemment, les moyens réglables de modification automatique 60 de l'inclinaison β du dossier, entre les positions assise et debout, sont réalisés en agissant sur la longueur LP du petit côté postérieur PP du premier quadrilatère déformable.According to the embodiment described above, the adjustable means for automatic modification 60 of the inclination β of the backrest, between the sitting and standing positions, are made by acting on the length L P of the small posterior side P P of the first deformable quadrilateral .

Toutefois, les moyens réglables de modification automatique 60 peuvent être réalisés en agissant sur un autre côté du quadrilatère déformable.However, the adjustable automatic modification means 60 can be made by acting on another side of the deformable quadrilateral.

Ainsi, la fig. 6 illustre une autre forme de réalisation selon laquelle les moyens de modification 60 de la forme du premier quadrilatère réglable sont constitués par des moyens de modification continue de la longueur de la barre supérieure 18 du premier quadrilatère déformable. Ces moyens de modification continue 60 sont, selon l'exemple illustré, constitués par une bague 90 reliant deux segments 91, 92 constitutifs de la barre 18 et liés, à chacun de ces segments, par un filetage, de sorte qu'une rotation de la. bague, dans un sens, permet une augmentation de la longueur LS du segment supérieur 18 et, dans le sens inverse, une réduction de la longueur LS du segment supérieur 18. So, the Fig. 6 illustrates another embodiment according to which the means 60 for modifying the shape of the first adjustable quadrilateral consist of means for continuously modifying the length of the upper bar 18 of the first deformable quadrilateral. These continuous modification means 60 are, according to the illustrated example, constituted by a ring 90 connecting two segments 91 , 92 constituting the bar 18 and connected to each of these segments by a thread, so that a rotation of the. ring, in one direction, allows an increase in the length L S of the upper segment 18 and, in the opposite direction, a reduction of the length L S of the upper segment 18.

Ainsi, en fonction de la longueur retenue, il est possible, au moyen, de la bague 90, d'agir tant sur le sens de la modification de l'inclinaison β du dossier que sur la valeur ou l'amplitude de cette modification.Thus, as a function of the length retained, it is possible, by means of the ring 90, to act both on the direction of the modification of the inclination β of the file and on the value or the amplitude of this modification.

Bien entendu, diverses autres modifications peuvent être apportées à l'invention sans sortir de son cadre.Of course, various other modifications can be made to the invention without departing from its scope.

Claims (10)

  1. A body support chair for the physically challenged and disabled comprising a frame (2) supporting an articulated structure (12), which comprises a seat, a foot rest, a back as well as two symmetrical lateral articulated systems (13) relative to a sagittal plane (P) of the chair, each comprising :
    ■ a first deformable quadrilateral (17) contributing to the support of the seat, composed of two sills, an upper (18) and a lower (19), respectively articulated by first and second points of articulation (21, 22) on a front part of the frame (2) and connected by pivots (201, 202) towards their rear end part by a spacer part (20);
    ■ a second deformable quadrilateral (26) contributing to the support of the foot rest;
    ■ a back assembly that is articulated on the first deformable quadrilateral (17) opposite the second deformable quadrilateral (26) by means of at least the spacer part (20) and which comprises at least one upright (35) connected to the spacer part (20); and
    ■ a maneuvering assembly (40) interposed between the first deformable quadrilateral (17) and the frame (2) in order to allow passage of the articulated structure (12) from a lowered position to a verticalized position of the structure relative to the frame and vice versa.
    characterized in that it comprises, in addition, means (60) for automatic modification of the inclination (β) of the uprights (35) of the back of the chair with respect to the vertical direction in the sagittal plane (P), between the lowered and verticalized positions, said means (60) making it possible to choose the direction of modification of the inclination (β) and/or of the amplitude of modification and comprising means (61, 90) for modification of the shape of the first deformable quadrilateral (17).
  2. A body support chair according to claim 1, characterized in that said means for automatic modification of the inclination (β) of the uprights (35) comprise, for each lateral articulated system (13), the spacer part (20) and the first deformable quadrilateral (17), which has a shape different from that of a parallelogram.
  3. A body support chair according to claim 1 or claim 2, characterized in that the upright (35) of the back of the chair is fitted, for each articulated system (13), to the spacer part (20) so as to form an angle (α) that remains constant in the course of the displacements of the articulated structure, between the lowered and verticalized positions and in that the first quadrilateral (17) has a shape different from that of a parallelogram.
  4. A body support chair according to any one of claims 1 to 3, characterized in that the lower and upper sills (19, 18) and their respective points of articulation (201, 21, 202, 22) define greater upper sides (GS) and lower sides (GI), whilst the spacer part (20) and the points of articulation (21, 22) on the front part of the frame (2) define a rear minor side (PP) and a front minor side (PA) of the first quadrilateral (17).
  5. A body support chair according to any one of claims 1 to 4, characterized in that the automatic modification means (60) make it possible to act on the sides of the first deformable quadrilateral (17) by acting on the length of said sides in order to modify the shape of said quadrilateral.
  6. A body support chair according to any one of claims 1 to 5, characterized in that the spacer part (20) has three holes (61) that are arranged in a triangle and that make it possible to choose the shape of the first quadrilateral (17) from among at least the three following shapes :
    ■ a parallelogram;
    ■ a quadrilateral, whose greater sides (GS, GI) have a same length (LS, LI), whilst the front minor side (Pa) has a length (La) greater than that (LP) of the rear minor side (PP);
    ■ a quadrilateral, whose greater sides have a same length (LS, LI), whilst the rear minor side (PP) has a length (LP) greater than that (La) of the front minor side (Pa).
  7. A body support chair according to claim 6, characterized in that in a parallelogram shape of the first quadrilateral (17), the angle (β) of the uprights (35) is identical in the lowered position and in the verticalized position relative to the vertical, in the sagittal plane (P).
  8. A body support chair according to any one of claims 1 to 6, characterized in that the means for modification of the shape of the shape of the first deformable quadrilateral (17) comprise means for continuous modification of the length of the upper sill (18), in particular comprised of a ring (90) connecting two constituent segments (91, 92) of the sill (18) and connected to each of said segments by a threaded part.
  9. A body support chair according to one of claims 1 to 8, characterized in that it comprises means (70) for adjusting the angle (α) of each upright (35) relative to the corresponding spacer part (20).
  10. A body support chair according to claim 9, characterized in that the adjustment means between the upright (35) and the spacer part (20) comprise for each upright (35) :
    ■ a fixation pivot (71) of the upright (35) on the spacer part (20) authorizing a rotational movement of the upright (35) between a retracted position against the upper sill (18) of the first quadrilateral (17) and a raised position; and
    ■ means (74) for locking the upright (35) in the raised position, which are attached to the spacer part (20) and are mobile on said latter, so as to make possible a continuous modification of the angle (α) between the upright (35) and the spacer part (20).
EP04356101A 2003-06-19 2004-06-17 Stand-up chair with self-modifying tilting of the backrest Expired - Lifetime EP1488770B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0307412 2003-06-19
FR0307412A FR2856282B1 (en) 2003-06-19 2003-06-19 VERTICALIZING SEAT WITH AUTOMATIC CHANGE OF RECLINER INCLINATION

Publications (2)

Publication Number Publication Date
EP1488770A1 EP1488770A1 (en) 2004-12-22
EP1488770B1 true EP1488770B1 (en) 2011-08-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04356101A Expired - Lifetime EP1488770B1 (en) 2003-06-19 2004-06-17 Stand-up chair with self-modifying tilting of the backrest

Country Status (4)

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US (1) US7234776B2 (en)
EP (1) EP1488770B1 (en)
AT (1) ATE521320T1 (en)
FR (1) FR2856282B1 (en)

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Also Published As

Publication number Publication date
FR2856282A1 (en) 2004-12-24
FR2856282B1 (en) 2006-02-17
US7234776B2 (en) 2007-06-26
US20050040688A1 (en) 2005-02-24
EP1488770A1 (en) 2004-12-22
ATE521320T1 (en) 2011-09-15

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