EP0588735A1 - Motorised assistance device for a lifting chair and lifting chair using such device - Google Patents

Motorised assistance device for a lifting chair and lifting chair using such device Download PDF

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Publication number
EP0588735A1
EP0588735A1 EP93420368A EP93420368A EP0588735A1 EP 0588735 A1 EP0588735 A1 EP 0588735A1 EP 93420368 A EP93420368 A EP 93420368A EP 93420368 A EP93420368 A EP 93420368A EP 0588735 A1 EP0588735 A1 EP 0588735A1
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EP
European Patent Office
Prior art keywords
articulated
cradle
levers
transmission
chassis
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Withdrawn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
EP93420368A
Other languages
German (de)
French (fr)
Inventor
Bernard Pillot
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.)
International Diffusion Consommateurs IDC SA
Original Assignee
International Diffusion Consommateurs IDC SA
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
Application filed by International Diffusion Consommateurs IDC SA filed Critical International Diffusion Consommateurs IDC SA
Publication of EP0588735A1 publication Critical patent/EP0588735A1/en
Withdrawn legal-status Critical Current

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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
    • 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
    • Y10S180/00—Motor vehicles
    • Y10S180/907—Motorized wheelchairs
    • 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
    • Y10S297/04—Wheelchair
    • 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 armchairs used by the handicapped and disabled and it relates, more particularly, to wheelchairs, whether they are folding or not.
  • this one sitting position that can be adopted does not allow readjustment to everyday life and does not facilitate social contacts.
  • this single sitting position is responsible for a physical deterioration revealing a loss of range of angular mobility of the lower limbs, defective blood circulation, a marked slowing down of the digestive and intestinal functions. , bone fragility, etc.
  • one of them consists in interposing between the chassis and the structure, an electric motor actuator which can be controlled to cause the raising or lowering of the articulated structure.
  • Another proposal has been to have, between the structure and the chassis of the chair, on the one hand, at least one elastic compensating member and, on the other hand, at least one operating assembly responsible for assuming a command and control function. control of the relative pivoting of the articulated structure and a geometric locking function of said structure, in the lowered or raised position relative to the chassis.
  • the technical solution thus proposed, has advantages of lightness, simplification of construction and assembly, and allows the user to act, without significant physical energy expenditure, on the maneuvering assemblies to command and control the strokes. raising and lowering of the articulated structure on which it rests.
  • An additional difficulty to be solved is the desire to maintain the verticalizing chair's characteristic of manual control and to provide possible means of motorized assistance which are adaptable, removably, quickly and practically, without their installation disturbing the usual operating characteristics, as well as those of rolling stability, at a fixed position in the lowered or raised position.
  • the object of the invention is to respond to the demand thus perceived, by proposing technical means which make it possible to overcome the above problems by offering a practical solution, relatively inexpensive, easy to adapt and to dismantle to make a lift chair or stander possibly equipped with or without a motorized assistance device.
  • Fig. 1 is a side elevation schematically showing a wheelchair for the disabled or disabled, equipped with a device according to the invention.
  • Fig. 2 is a side view similar to FIG. 1 but illustrating the object of the invention in another characteristic position.
  • Fig. 3 is a partial section taken substantially along line III - III of FIG. 1 .
  • Figs. 4, 5, and 6 are side elevations illustrating three characteristic operating positions of the object of the invention.
  • Fig. 7 is a partial elevation showing, on a larger scale, an alternative embodiment of one of the constituent elements of the object of the invention.
  • Fig. 8 is a side view, partially broken away, taken along line VIII - VIII of FIG. 7 .
  • Figs. 9 to 11 are three transverse schematic views illustrating another characteristic of the subject of the invention.
  • Figs. 1 to 3 show diagrammatically, a wheelchair 1 comprising a chassis 2 constituted by anterior 3 and posterior uprights 4 joined together by beams 5a and 5b , for example, and by crosspieces such as 6 .
  • the chassis 2 is usually provided with carrier and driving wheels 10 and steerable wheels 11 .
  • the frame 2 can correspond, indifferently, to a rigid or possibly folding design and in such a case, the crosspieces 6 are designed from articulated elements which can be locked in the deployed position, in a known manner, which are not part of the subject of the invention.
  • the chassis 2 is equipped with a lifting device produced in the form of an articulated structure, generally designated by the reference 12 .
  • the articulated structure 12 comprises a seat 13 which is, for example, constituted by two upper side members 14 articulated by two front axes 15 on extensions of the front uprights 3 .
  • the seat 13 is also composed of two secondary side members 16 which are mounted by articulation points 17 on the upper side members 5b and set back from the front uprights 3 .
  • the rear ends of the side members 14 and 16 are linked by articulation points 18 and 19 to a frame or the like 20 constituting a backrest element.
  • the upper side members 14 are provided, beyond the pivot points 15 , with extensions 21 on which is hinged a footrest 22 constituted by legs 23 connected to the front uprights 3 by spacing bars 24 which are each articulated by a point 25 on the jamb, and by a point 26 on the anterior upright 3 .
  • the articulated structure 12 is linked to the chassis 5 by at least one elastic member 27 interposed between the seat 13 and the chassis 5 .
  • the elastic member 27 is preferably arranged between the upper longitudinal members 14 of the seat 13 and the lower longitudinal members 5a of the chassis 2 .
  • the elastic member 27 is designed to assume a weight compensation and energy absorption function, as well as a restitution function, and can be formed by a compensating spring or preferably by a gas type jack.
  • the articulated structure 12 is, moreover, linked to the chassis 5 by two lateral maneuvering assemblies 30 intended to assume a function of command and manual control of the relative pivoting of the structure 12 relative to the chassis and a function of stop and locking in a position of maximum lowering as illustrated in fig. 1 and in a position of maximum elevation as shown in FIG. 2 .
  • each maneuvering assembly 30 comprises a lever 31 mounted articulated by a point 32 on the seat element 13 and, more particularly, the lower beam 16 near the point of articulation 19 .
  • the lever 31 forms a first branch or a flywheel 33 constituting a manual control member and a second branch 34 which is linked by a hinge pin 35 to a connecting rod 36 mounted by a hinge pin 37 on the rear part of the spar upper 5b of chassis 2 .
  • the relative lengths between the branch 34 and the link 36 as well as the positions of the articulation points 32 and 37 are chosen so that, in the lowered state according to FIG. 1 , the articulation point 32 is arranged below the fictitious line passing through the articulation points 35 and 37 . This results in a geometric locking opposing any untimely pivoting of the lever 31 in the direction of the arrow f1 .
  • the stand-up chair described above can therefore occupy a lowering position, as illustrated in FIG. 1 , providing a stable sitting position. In this state, the compensating member or members 27 are compressed.
  • the subject When the subject wishes to be transferred from the sitting position to a verticalization position, he acts on the levers 31 and, more particularly, the branches 33 in the direction of the arrow f1 , so as to cause the displacement of the articulation points 32 above the links 36 , to break the geometrical locking and thus release the movement of the articulated structure 12 .
  • the levers 31 can then, with the help of the elastic compensating member or members 27 , give the user control of the elevation of the structure 12 until reaching the stable state according to FIG. 2 in which the footrest 22 is supported on the ground S , while the axis 35 has passed above the fictitious line joining the points of articulation 32 and 37 .
  • the object of the invention is to propose a device which takes account of the above structural and functional characteristics, and which makes it possible to adapt, when necessary, a motorized assistance device temporarily responsible for taking over control of the subject not momentarily having the physical capacity to act on the maneuvering assemblies 30 .
  • the motorized assistance device adaptable to a lift chair of the above type, comprises a rigid cradle 40 , for example, produced in the form of a frame which can be adapted by fixing members 41 on the chassis 2 and more particularly the side members 5a .
  • the cradle 40 is designed to be adapted to the rear part of the chassis 2 and under the axis of rotation or axle x - x ' , corresponding to the rear wheels 10 , so as to contribute to a lowering of the center of gravity to give, in all positions of the chair, appreciable and remarkable safety stability.
  • the cradle 40 is designed to be adapted on rear extensions 42 of the side members 5a and to be, for example, immobilized in translation by the members 41 which can be associated with any removable fixing means by tightening button or the like.
  • Figs. 1 and 3 show that it may be advantageous to produce the members 41 in the form of legs or of bent hands, capable of enclosing the lower beams 5a in particular on either side of the rear uprights 4 .
  • the cradle 40 is designed to be removably adapted to allow rapid assembly and disassembly.
  • the cradle 40 carries a motorization group 43 advantageously comprising a reversible electric motor and a rechargeable accumulator battery.
  • a power unit 43 must be considered to be commercial.
  • the power unit 43 is provided with a remote control unit 44 , for example, by means of a cord 45 .
  • the housing 44 is placed at the disposal of the user by being, for example, removably adapted to one of the elements of the articulated structure 12 and, for example, an armrest.
  • the power unit 43 mounted on the cradle 40 by a hinge 43a , comprises a movable control member 46 which is, for example, analogous to the rod of a jack, oriented to attack a transmission 47 which is preferably designed to introduce a transformation of the alternating rectilinear displacement of the rod 46 .
  • the transmission 47 comprises, for example, a crank 48 carried by a shaft 49 mounted capable of rotating in bearings carried by the cradle 40 .
  • the transmission 47 is designed to control, simultaneously and in synchronism, two lateral articulated systems 50 each composed of two sets of levers 51 and 52 .
  • the first set of levers 51 comprises an angled lever 53 mounted by a point of articulation 54 to rotate on the cradle 40 .
  • the axis of rotation 54 can be merged with the shaft 49 and in such a case, the crank 48 can be likened to one of the branches of each of the bent levers 53 . It should be considered that a different arrangement could also occur, consisting, for example, in connecting the rod 46 of the power unit 43 with the shaft 49 which would provide a physical connection between the corresponding branches of the two lateral levers 53 .
  • the angled levers 51 comprise angularly fixed branches, so that the second branch, designated by the reference 55 , is linked by a point of articulation 56 to a connecting rod 57 itself linked to the second set of lever 52 .
  • Fig. 2 shows more precisely that the second set 52 comprises an angled lever 58 which is mounted by a hinge point 59 on the side member 16 .
  • the lever 58 is articulated by its small branch to the rod 57 by a joint 60 and by its large branch to a rod 61 by means of a joint 62 .
  • the link 61 is linked by an articulation 63 to the manual control member 30 , so that the articulation 63 is located between the pivot point 32 and the end of the branch 33 .
  • the motorized assistance device in connection with a chair of the type described above operates as follows, from the position corresponding to a stable state of lowering of the articulated structure 12 .
  • the control members 30 are required to pivot in the direction of the arrow f1 , so that the articulation points 35 are lowered and cause the connecting rods 36 to pass into the position illustrated in FIG. 4 , in which the pivot points 32 are placed relatively above these rods, thereby releasing the geometric lock previously established.
  • the pushing action of the rods 57 while producing the pivoting of the levers 58 , ensures the elevation of the seat 13 in the direction of the arrow f5 in association with the restitution of work stored by the or the elastic bodies 27 .
  • the articulated structure 12 is thus gradually brought into an intermediate elevation position as illustrated in FIG. 5.
  • the subject acts on the housing 44 to control the reverse supply of the power unit 43 in order to urge the rod 46 in the retraction stroke.
  • Such displacement of the rod 46 produces, first of all, the unlocking of the verticalization position by displacement of the articulation 35 below the fictitious line joining the pivot points 32 and 37 .
  • the device according to the invention is intended to provide, when necessary, motorized assistance to a stand-up or manual lift chair.
  • the articulated systems 50 are preferably made in such a way that it is possible to easily break the connection between the two sets 51 and 52 .
  • Figs. 7 and 8 show such an exemplary embodiment, consisting in providing on the small branch of each bent lever 58 a pin 70 for engaging the corresponding end of the rod 57 .
  • the immobilization of the connecting rod 57 on the pin is, for example, ensured by a tab 71 movably mounted on an axis 72 of the lever 58 and comprising at its opposite end a notch 73 intended to overlap the pin 70 after installation of the connecting rod 57 .
  • Figs. 9 to 11 show a possibility of rapid adaptation of the cradle 40 on the chassis 2 , more particularly, when the latter is formed in a folding form such as is frequently the case with regard to wheelchairs.
  • the longitudinal members 5a secured by the uprights 3 and 4 , are also joined by one or more sets of scissors 80 associated with one or more coupling rod 81 .
  • the positioning of the cradle 40 takes place, then, when the chassis 2 is in a partially folded position, as illustrated in FIG. 9 , so that the transverse spacing between the side members 5a is less than the fixed spacing between the members 41 which may advantageously be constituted, as said above, by legs or bent hands.

Abstract

Lifting chair for handicapped persons. The assistance device comprises: - a support cradle (40) intended to be fitted on the frame (2), - a power unit (43) mounted on the cradle and comprising a movable member (46), with reversible displacement, connected to a transmission (47) supported by the cradle, - at least one articulated system (50) driven by the transmission ad comprising a first set (51) of levers intended to act on the articulated structure, and a second set (52) of levers activated by the first set and intended to act on the manoeuvring assembly, - and a control box (44) for controlling the functioning of the power unit. Application to manually operated chairs. <IMAGE>

Description

La présente invention concerne les fauteuils utilisés par les handicapés et les invalides et elle vise, plus particulièrement, les fauteuils roulants, qu'ils soient pliants ou non.The present invention relates to armchairs used by the handicapped and disabled and it relates, more particularly, to wheelchairs, whether they are folding or not.

Il est incontestable que les fauteuils roulants ont apporté une possibilité de mobilité aux handicapés et 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.There is no question that wheelchairs have provided mobility for the disabled and disabled. These wheelchairs have, however, several drawbacks due to the fact that the users can only occupy a seated position, moreover, generally maintained for relatively long periods.

En premier lieu, cette seule position assise pouvant être adoptée, ne permet pas une réadaptation à la vie courante et ne facilite pas les contacts sociaux.First of all, this one sitting position that can be adopted does not allow readjustment to everyday life and does not facilitate social contacts.

En second lieu, cette seule position assise, maintenue pendant des durées généralement longues, est responsable d'une dégradation physique faisant apparaître une perte d'amplitude de mobilité angulaire des membres inférieurs, une circulation sanguine défectueuse, un ralentissement marqué des fonctions digestives et intestinales, une fragilité osseuse, etc.Secondly, this single sitting position, maintained for generally long periods, is responsible for a physical deterioration revealing a loss of range of angular mobility of the lower limbs, defective blood circulation, a marked slowing down of the digestive and intestinal functions. , bone fragility, etc.

Pour tenter de remédier à ces inconvénients, différentes propositions ont été formulées à partir d'une conception faisant intervenir, sur le châssis du fauteuil, une structure articulée comprenant un dossier, une assise et un repose-pieds. En règle générale, une telle structure articulée est montée sur l'assise par un axe frontal, horizontal, perpendiculaire au plan de symétrie vertical du châssis.In an attempt to remedy these drawbacks, various proposals have been made based on a design involving, on the chassis of the armchair, an articulated structure comprising a backrest, a seat and a footrest. As a general rule, such an articulated structure is mounted on the seat by a frontal, horizontal axis, perpendicular to the vertical plane of symmetry of the chassis.

Parmi les propositions, l'une d'elles consiste à interposer entre le châssis et la structure, un vérin à moteur électrique pouvant être commandé pour provoquer l'élévation ou l'abaissement de la structure articulée.Among the proposals, one of them consists in interposing between the chassis and the structure, an electric motor actuator which can be controlled to cause the raising or lowering of the articulated structure.

Une autre proposition a été de disposer entre la structure et le châssis du fauteuil, d'une part, au moins un organe élastique compensateur et, d'autre part, au moins un ensemble de manoeuvre chargé d'assumer une fonction de commande et de contrôle du pivotement relatif de la structure articulée et une fonction de verrouillage géométrique de ladite structure, en position d'abaissement ou d'élévation par rapport au châssis.Another proposal has been to have, between the structure and the chassis of the chair, on the one hand, at least one elastic compensating member and, on the other hand, at least one operating assembly responsible for assuming a command and control function. control of the relative pivoting of the articulated structure and a geometric locking function of said structure, in the lowered or raised position relative to the chassis.

Une telle proposition est illustrée par le brevet français 2 529 456.Such a proposal is illustrated by French patent 2,529,456 .

La solution technique, ainsi proposée, présente des avantages de légèreté, de simplification de construction et de montage, et permet à l'utilisateur d'agir, sans dépense d'énergie physique importante, sur les ensembles de manoeuvre pour commander et contrôler les courses d'élévation et d'abaissement de la structure articulée sur laquelle il repose.The technical solution, thus proposed, has advantages of lightness, simplification of construction and assembly, and allows the user to act, without significant physical energy expenditure, on the maneuvering assemblies to command and control the strokes. raising and lowering of the articulated structure on which it rests.

Dans la conception d'une telle proposition, il a été retenu de concevoir les ensembles de manoeuvre, de manière à disposer en position abaissée et en position élevée de deux états à verrouillage géométrique certain, conférant ainsi deux positions stables extrêmes assurant toute sécurité à l'utilisateur pour éviter, soit une élévation intempestive sous l'action du compensateur élastique, soit un abaissement inopiné à partir de la position d'élévation ou de verticalisation.In the design of such a proposal, it was chosen to design the operating assemblies, so as to have in the lowered position and in the raised position two states with certain geometrical locking, thus conferring two extreme stable positions ensuring complete safety for the user to avoid either an untimely rise under the action of the elastic compensator, or an unexpected lowering from the elevation or verticalization position.

Il doit certainement être considéré, qu'une telle proposition donne entière satisfaction aux utilisateurs par la souplesse d'utilisation qu'elle leur procure ainsi que par la liberté de déplacement qu'elle confère.It must certainly be considered that such a proposal gives full satisfaction to users by the flexibility of use which it provides them as well as by the freedom of movement which it confers.

Les études de mise en service, d'utilisation et d'appréciation fonctionnelle de tels fauteuils élévateurs ou verticalisateurs, ont permis de faire apparaître que, dans certains cas, les utilisateurs auraient souhaité pouvoir disposer temporairement d'une sorte d'aide pour alléger ou réduire l'action physique qu'ils doivent porter sur les ensembles de manoeuvre. Tel est le cas, lorsque l'utilisateur est sujet à une fatigue passagère naturelle ou consécutive à une intervention ou a vu, depuis le début d'utilisation d'un tel fauteuil, ses forces physiques décroîtrent légèrement sans perte de poids, au point que le règlage du compensateur élastique ou son remplacement deviennent inopérants.Studies into the commissioning, use and functional assessment of such elevating or standing chairs have shown that, in some cases, users would have liked to have had some sort of temporary help to lighten or reduce the physical action they must carry on the maneuvering sets. This is the case, when the user is subject to temporary natural fatigue or consecutive to an intervention or has seen, since the start of using such a chair, his physical forces decrease slightly without weight loss, to the point that the adjustment of the elastic compensator or its replacement becomes ineffective.

Le problème s'est alors posé de pouvoir disposer d'une assistance motorisée partielle et temporaire, adaptable sur un fauteuil élévateur ou verticalisateur à commande manuelle du type ci-dessus, sans transformer un tel fauteuil en un équipement d'assistance complète, comme ceux du type de la première proposition évoquée ci-avant.The problem then arose of being able to have partial and temporary motorized assistance, adaptable to a manual lift or stand-up chair of the above type, without transforming such a chair into complete assistance equipment, such as those of the type of the first proposal mentioned above.

On pourrait penser qu'un tel besoin peut être satisfait en prévoyant une installation de motorisation agissant directement sur les ensembles de commande latéraux. Les expérimentations qui ont été faites dans ce sens montrent, toutefois, qu'une telle façon d'agir est pratiquement impossible et conduit à des ruptures, soit des ensembles latéraux directement, soit de leurs organes d'articulation en raison des forces élévées qui doivent être appliquées pour combattre l'effet multiplicateur qui est attaché par construction aux ensembles latéraux.One might think that such a need can be satisfied by providing a motorized installation acting directly on the control assemblies. lateral. The experiments which have been made in this direction show, however, that such a way of acting is practically impossible and leads to ruptures, either of the lateral assemblies directly, or of their articulation organs because of the high forces which must be applied to combat the multiplier effect which is attached by construction to the side assemblies.

On pourrait penser, également, qu'il suffit d'agir en association avec le compensateur élastique sur la structure articulée et plus particulièrement, sur l'assise, par exemple, au moyen d'une biellette articulée commandée par un organe moteur approprié. En réalité, une telle proposition n'est pas non plus réaliste car elle ne prend pas en compte la nécessité de neutraliser les positions de verrouillage haute et basse, avant d'initier toute commande de pivotement de la structure articulée en mouvement d'élévation ou en mouvement d'abaissement.One might also think that it suffices to act in association with the elastic compensator on the articulated structure and more particularly, on the seat, for example, by means of an articulated link controlled by an appropriate drive member. In reality, such a proposal is also not realistic because it does not take into account the need to neutralize the high and low locking positions, before initiating any pivoting command of the articulated structure in elevation movement or in lowering motion.

Une difficulté supplémentaire à résoudre tient à la volonté de maintenir au fauteuil verticalisateur sa caractéristique de commande manuelle et de prévoir d'éventuels moyens d'assistance motorisée qui soient adaptables, de façon amovible, rapidement et pratiquement, sans que leur mise en place vienne perturber les caractéristiques de fonctionnement habituel, ainsi que celles de stabilité roulante, à poste fixe en position abaissée ou élevée.An additional difficulty to be solved is the desire to maintain the verticalizing chair's characteristic of manual control and to provide possible means of motorized assistance which are adaptable, removably, quickly and practically, without their installation disturbing the usual operating characteristics, as well as those of rolling stability, at a fixed position in the lowered or raised position.

L'objet de l'invention est de répondre à la demande ainsi perçue, en proposant des moyens techniques qui permettent de surmonter les problèmes ci-dessus en offrant une solution pratique, relativement peu onéreuse, facile d'adaptation et de démontage pour rendre un fauteuil élévateur ou verticalisateur éventuellement pourvu ou dépourvu d'un dispositif d'assistance motorisée.The object of the invention is to respond to the demand thus perceived, by proposing technical means which make it possible to overcome the above problems by offering a practical solution, relatively inexpensive, easy to adapt and to dismantle to make a lift chair or stander possibly equipped with or without a motorized assistance device.

Pour atteindre les objectifs ci-dessus, l'invention propose un dispositif d'assistance motorisée, adaptable sur un fauteuil élévateur qui comprend un châssis supportant une structure articulée reliée audit châssis par au moins un ensemble de manoeuvre manuelle, dispositif caractérisé en ce qu'il comprend :

  • un berceau porteur destiné à être adapté sur le châssis.
  • un groupe de motorisation monté sur le berceau et comportant un organe mobile, à déplacement réversible, lié à une transmission portée par le berceau.
  • au moins un système articulé attaqué par la transmission et comprenant un premier jeu de leviers destiné à agir sur la structure articulée, et un second jeu de leviers actionné par le premier et destiné à agir sur l'ensemble de manoeuvre.
  • et un boîtier de commande du fonctionnement du groupe de motorisation.
To achieve the above objectives, the invention provides a motorized assistance device, adaptable to a lift chair which comprises a chassis supporting an articulated structure connected to said chassis by at least one manual operating assembly, device characterized in that He understands :
  • a carrying cradle intended to be adapted to the chassis.
  • a power unit mounted on the cradle and comprising a movable member, with reversible displacement, linked to a transmission carried by the cradle.
  • at least one articulated system attacked by the transmission and comprising a first set of levers intended to act on the articulated structure, and a second set of levers actuated by the first and intended to act on the operating assembly.
  • and a control unit for the operation of the power unit.

L'invention a aussi pour objet, un fauteuil élévateur, du type comprenant un châssis supportant une structure articulée formée par un dossier, une assise et un repose-pieds articulés dans le prolongement l'un de l'autre, ledit fauteuil comportant au moins un organe élastique interposé entre la structure articulée et le châssis, et au moins un ensemble de manoeuvre qui est interposé entre la structure et le châssis sur lesquels il est articulé et qui possède un organe de commande manuelle, ledit fauteuil étant caractérisé en ce qu'il comporte un dispositif d'assistance motorisée comprenant :

  • un berceau adapté sur le châssis,
  • un groupe de motorisation monté sur le berceau et comportant un organe mobile, à déplacement réversible, lié à une transmission portée par le berceau,
  • au moins un système articulé, attaqué par la transmission, et comprenant un premier jeu de leviers lié à la transmission et un second jeu de leviers lié au premier et monté articulé sur l'assise et sur l'organe de commande manuelle,
  • et un boîtier de commande du groupe de motorisation, placé à la disposition de l'utilisateur.
The subject of the invention is also a lift chair, of the type comprising a frame supporting an articulated structure formed by a backrest, a seat and a footrest articulated in the extension of one another, said chair comprising at least an elastic member interposed between the articulated structure and the frame, and at least one operating assembly which is interposed between the structure and the frame on which it is articulated and which has a manual control member, said chair being characterized in that it includes a motorized assistance device comprising:
  • a suitable cradle on the chassis,
  • a power unit mounted on the cradle and comprising a movable member, with reversible displacement, linked to a transmission carried by the cradle,
  • at least one articulated system, driven by the transmission, and comprising a first set of levers linked to the transmission and a second set of levers linked to the first and mounted articulated on the seat and on the manual control member,
  • and a motor unit control box, placed at the disposal of the user.

Diverses autres caractéristiques ressortent de la description faite ci-dessous en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, des formes de réalisation de l'objet de l'invention.Various other characteristics will emerge from the description given below with reference to the appended drawings which show, by way of nonlimiting examples, embodiments of the subject of the invention.

La fig. 1 est une élévation latérale montrant schématiquement un fauteuil roulant pour handicapé ou invalide, équipé d'un dispositif conforme à l'invention. Fig. 1 is a side elevation schematically showing a wheelchair for the disabled or disabled, equipped with a device according to the invention.

La fig. 2 est une vue latérale analogue à la fig. 1 mais illustrant l'objet de l'invention dans une autre position caractéristique. Fig. 2 is a side view similar to FIG. 1 but illustrating the object of the invention in another characteristic position.

La fig. 3 est une coupe partielle prise sensiblement selon la ligne III - III de la fig. 1. Fig. 3 is a partial section taken substantially along line III - III of FIG. 1 .

Les fig. 4, 5, et 6 sont des élévations latérales illustrant trois positions caractéristiques de fonctionnement de l'objet de l'invention. Figs. 4, 5, and 6 are side elevations illustrating three characteristic operating positions of the object of the invention.

La fig. 7 est une élévation partielle montrant, à plus grande échelle, une variante de réalisation de l'un des éléments constitutifs de l'objet de l'invention. Fig. 7 is a partial elevation showing, on a larger scale, an alternative embodiment of one of the constituent elements of the object of the invention.

La fig. 8 est une vue latérale, en partie arrachée, prise selon la ligne VIII -VIII de la fig. 7. Fig. 8 is a side view, partially broken away, taken along line VIII - VIII of FIG. 7 .

Les fig. 9 à 11 sont trois vues schématiques transversales illustrant une autre caractéristique de l'objet de l'invention. Figs. 9 to 11 are three transverse schematic views illustrating another characteristic of the subject of the invention.

Les fig. 1 à 3 montrent schématiquement, un fauteuil roulant 1 comprenant un châssis 2 constitué par des montants antérieurs 3 et postérieurs 4 réunis entre eux par des longerons 5a et 5b, par exemple, et par des traverses telles que 6. Le châssis 2 est pourvu de façon habituelle de roues porteuses et motrices 10 et de roues orientables 11. Figs. 1 to 3 show diagrammatically, a wheelchair 1 comprising a chassis 2 constituted by anterior 3 and posterior uprights 4 joined together by beams 5a and 5b , for example, and by crosspieces such as 6 . The chassis 2 is usually provided with carrier and driving wheels 10 and steerable wheels 11 .

Le châssis 2 peut correspondre, indifféremment, à une conception rigide ou éventuellement pliante et dans un tel cas, les traverses 6 sont conçues à partir d'éléments articulés verrouillables en position déployée, d'une manière connue, ne faisant pas partie de l'objet de l'invention.The frame 2 can correspond, indifferently, to a rigid or possibly folding design and in such a case, the crosspieces 6 are designed from articulated elements which can be locked in the deployed position, in a known manner, which are not part of the subject of the invention.

Le châssis 2 est équipé d'un dispositif élévateur réalisé sous la forme d'une structure articulée, désignée dans son ensemble par la référence 12. La structure articulée 12 comprend une assise 13 qui est, par exemple, constituée par deux longerons supérieurs 14 articulés par deux axes frontaux 15 sur des prolongements des montants antérieurs 3. L'assise 13 est composée également par deux longerons secondaires 16 qui sont montés par des points d'articulation 17 sur les longerons supérieurs 5b et en retrait des montants antérieurs 3.The chassis 2 is equipped with a lifting device produced in the form of an articulated structure, generally designated by the reference 12 . The articulated structure 12 comprises a seat 13 which is, for example, constituted by two upper side members 14 articulated by two front axes 15 on extensions of the front uprights 3 . The seat 13 is also composed of two secondary side members 16 which are mounted by articulation points 17 on the upper side members 5b and set back from the front uprights 3 .

Les extrémités postérieures des longerons 14 et 16 sont liées par des pointsd'articulation 18 et 19 à un cadre ou analogue 20 constituant un élément de dossier. Les longerons supérieurs 14 sont pourvus, au-delà des points de pivotement 15, de prolongements 21 sur lesquels se trouve articulé un repose-pieds 22 constitué par des jambages 23 reliés aux montants antérieurs 3 par des barrettes d'écartement 24 qui sont articulées chacune par un point 25 sur le jambage, et par un point 26 sur le montant antérieur 3.The rear ends of the side members 14 and 16 are linked by articulation points 18 and 19 to a frame or the like 20 constituting a backrest element. The upper side members 14 are provided, beyond the pivot points 15 , with extensions 21 on which is hinged a footrest 22 constituted by legs 23 connected to the front uprights 3 by spacing bars 24 which are each articulated by a point 25 on the jamb, and by a point 26 on the anterior upright 3 .

La structure articulée 12 est liée au châssis 5 par au moins un organe élastique 27 interposé entre l'assise 13 et le châssis 5. L'organe élastique 27 est, de préférence, disposé entre les longerons supérieurs 14 de l'assise 13 et les longerons inférieurs 5a du châssis 2. L'organe élastique 27 est conçu pour assumer une fonction de compensation de poids et d'absorption d'énergie, ainsi qu'une fonction de restitution, et peut être formé par un ressort compensateur ou de préférence par un vérin du type à gaz.The articulated structure 12 is linked to the chassis 5 by at least one elastic member 27 interposed between the seat 13 and the chassis 5 . The elastic member 27 is preferably arranged between the upper longitudinal members 14 of the seat 13 and the lower longitudinal members 5a of the chassis 2 . The elastic member 27 is designed to assume a weight compensation and energy absorption function, as well as a restitution function, and can be formed by a compensating spring or preferably by a gas type jack.

La structure articulée 12 est, en outre, liée au châssis 5 par deux ensembles de manoeuvre latéraux 30 destinés à assumer une fonction de commande et de contrôle manuel de pivotement relatif de la structure 12 par rapport au châssis et une fonction de butée et de verrouillage dans une position d'abaissement maximale telle qu'illustrée par la fig. 1 et dans une position d'élévation maximale telle qu'elle ressort de la fig. 2.The articulated structure 12 is, moreover, linked to the chassis 5 by two lateral maneuvering assemblies 30 intended to assume a function of command and manual control of the relative pivoting of the structure 12 relative to the chassis and a function of stop and locking in a position of maximum lowering as illustrated in fig. 1 and in a position of maximum elevation as shown in FIG. 2 .

A cette fin, chaque ensemble de manoeuvre 30 comprend un levier 31 monté articulé par un point 32 sur l'élément d'assise 13 et, plus particulièrement, le longeron inférieur 16 à proximité du point d'articulation 19. Le levier 31 forme une première branche ou un volant 33 constituant un organe de commande manuel et une seconde branche 34 qui est liée par un axe d'articulation 35 à une bielle 36 montée par un axe d'articulation 37 sur la partie arrière du longeron supérieur 5b du châssis 2.To this end, each maneuvering assembly 30 comprises a lever 31 mounted articulated by a point 32 on the seat element 13 and, more particularly, the lower beam 16 near the point of articulation 19 . The lever 31 forms a first branch or a flywheel 33 constituting a manual control member and a second branch 34 which is linked by a hinge pin 35 to a connecting rod 36 mounted by a hinge pin 37 on the rear part of the spar upper 5b of chassis 2 .

Les longueurs relatives entre la branche 34 et la biellette 36 ainsi que les positions des points d'articulation 32 et 37, sont choisies pour que, dans l'état d'abaissement selon la fig. 1, le point d'articulation 32 soit disposé en dessous de la ligne fictive passant par les points d'articulation 35 et 37. Il en résulte un verrouillage géométrique s'opposant à tout pivotement intempestif du levier 31 dans le sens de la flèche f₁.The relative lengths between the branch 34 and the link 36 as well as the positions of the articulation points 32 and 37 are chosen so that, in the lowered state according to FIG. 1 , the articulation point 32 is arranged below the fictitious line passing through the articulation points 35 and 37 . This results in a geometric locking opposing any untimely pivoting of the lever 31 in the direction of the arrow f₁ .

Les caractéristiques données précédemment sont également prévues pour que dans l'état d'élévation, tel qu'illustré par la fig. 2, le point d'articulation 35 soit placé en dessous de la ligne fictive passant par les points d'articulation 32 et 37. Il en résulte également dans cet état, un verrouillage géométrique s'opposant au déplacement intempestif du levier 31 dans le sens de la flèche f₂.The characteristics given above are also provided so that in the elevation state, as illustrated in FIG. 2 , the articulation point 35 is placed below the fictitious line passing through the articulation points 32 and 37 . he also results in this state, a geometric locking opposing the untimely movement of the lever 31 in the direction of the arrow f₂ .

Le fauteuil verticalisateur décrit, ci-dessus, peut donc occuper une position d'abaissement, tel qu'illustré par la fig. 1, offrant une position d'assise stable. Dans cet état, le ou les organes compensateurs 27 sont comprimés.The stand-up chair described above can therefore occupy a lowering position, as illustrated in FIG. 1 , providing a stable sitting position. In this state, the compensating member or members 27 are compressed.

Lorsque le sujet désire être transféré de la position assise à une position de verticalisation, il agit sur les leviers 31 et, plus particulièrement, les branches 33 dans le sens de la flèche f₁, de manière à provoquer le déplacement des points d'articulation 32 au dessus des biellettes 36, pour rompre le verrouillage géométrique et ainsi liberer le déplacement de la structure articulée 12. Les leviers 31 peuvent alors, avec l'aide du ou des organes compensateurs élastiques 27, donner à l'utilisateur le contrôle de l'élévation de la structure 12 jusqu'à atteindre l'état stable selon la fig. 2 dans laquelle le repose-pieds 22 prend appui sur le sol S, alors que l'axe 35 est passé au dessus de la ligne fictive joignant les points d'articulation 32 et 37.When the subject wishes to be transferred from the sitting position to a verticalization position, he acts on the levers 31 and, more particularly, the branches 33 in the direction of the arrow f₁ , so as to cause the displacement of the articulation points 32 above the links 36 , to break the geometrical locking and thus release the movement of the articulated structure 12 . The levers 31 can then, with the help of the elastic compensating member or members 27 , give the user control of the elevation of the structure 12 until reaching the stable state according to FIG. 2 in which the footrest 22 is supported on the ground S , while the axis 35 has passed above the fictitious line joining the points of articulation 32 and 37 .

Dans cet état, un verrouillage géométrique s'établit, conférant une stabilité de sécurité à la position élevée.In this state, a geometrical lock is established, conferring safety stability in the elevated position.

L'objet de l'invention est de proposer un dispositif qui tienne compte des caractéristiques structurelles et fonctionnelles ci-dessus, et qui permette d'adapter, lorsque cela est nécessaire, un dispositif d'assistance motorisée chargé temporairement de prendre la relève de commande du sujet n'ayant pas momentanément la capacité physique d'agir sur les ensembles de manoeuvre 30.The object of the invention is to propose a device which takes account of the above structural and functional characteristics, and which makes it possible to adapt, when necessary, a motorized assistance device temporarily responsible for taking over control of the subject not momentarily having the physical capacity to act on the maneuvering assemblies 30 .

Les fig. 1 et 3 montrent que le dispositif d'assistance motorisée, adaptable sur un fauteuil élévateur du type ci-dessus, comprend un berceau rigide 40, par exemple, réalisé sous la forme d'un cadre pouvant être adapté par des organes de fixation 41 sur le châssis 2 et plus particulièrement les longerons 5a. Suivant une disposition avantageuse de l'invention, le berceau 40 est conçu pour être adapté à la partie arrière du châssis 2 et sous l'axe de rotation ou essieu x-x', correspondant aux roues arrières 10, de façon à contribuer à un abaissement du centre de gravité pour conférer, dans toutes les positions du fauteuil, une stabilité de sécurité appréciable et remarquable. De préférence, le berceau 40 est conçu pour être adapté sur des prolongements arrière 42 des longerons 5a et pour être, par exemple, immobilisé en translation par les organes 41 qui peuvent être associés à tout moyen de fixation amovible par bouton de serrage ou analogue. Figs. 1 and 3 show that the motorized assistance device, adaptable to a lift chair of the above type, comprises a rigid cradle 40 , for example, produced in the form of a frame which can be adapted by fixing members 41 on the chassis 2 and more particularly the side members 5a . According to an advantageous arrangement of the invention, the cradle 40 is designed to be adapted to the rear part of the chassis 2 and under the axis of rotation or axle x - x ' , corresponding to the rear wheels 10 , so as to contribute to a lowering of the center of gravity to give, in all positions of the chair, appreciable and remarkable safety stability. Preferably, the cradle 40 is designed to be adapted on rear extensions 42 of the side members 5a and to be, for example, immobilized in translation by the members 41 which can be associated with any removable fixing means by tightening button or the like.

Les fig. 1 et 3 montrent qu'il peut être avantageux de réaliser les organes 41 sous la forme de pattes ou de mains coudées, susceptibles d'enserrer les longerons inférieurs 5a notamment de part et d'autre des montants postérieurs 4. Figs. 1 and 3 show that it may be advantageous to produce the members 41 in the form of legs or of bent hands, capable of enclosing the lower beams 5a in particular on either side of the rear uprights 4 .

Dans tous les cas, le berceau 40 est conçu pour être adapté de façon amovible pour permettre un montage et un démontage rapides.In all cases, the cradle 40 is designed to be removably adapted to allow rapid assembly and disassembly.

Le berceau 40 porte un groupe de motorisation 43 comprenant avantageusement un moteur électrique réversible et une batterie d'accumulateurs rechargeable. Un tel groupe de motorisation 43 doit être considéré comme relevant du commerce.The cradle 40 carries a motorization group 43 advantageously comprising a reversible electric motor and a rechargeable accumulator battery. Such a power unit 43 must be considered to be commercial.

Le groupe de motorisation 43 est pourvu d'un boîtier 44 de commande à distance, par exemple, au moyen d'un cordon 45. Le boîtier 44 est placé à la disposition de l'utilisateur en étant, par exemple, adapté de façon amovible sur l'un des éléments de la structure articulée 12 et, par exemple, un accoudoir.The power unit 43 is provided with a remote control unit 44 , for example, by means of a cord 45 . The housing 44 is placed at the disposal of the user by being, for example, removably adapted to one of the elements of the articulated structure 12 and, for example, an armrest.

Le groupe de motorisation 43, monté sur le berceau 40 par une articulation 43a, comporte un organe mobile de commande 46 qui est, par exemple, analogue à la tige d'un vérin, orienté pour attaquer une transmission 47 qui est, de préférence, conçue pour introduire une transformation du déplacement rectiligne alternatif de la tige 46. La transmission 47 comprend, par exemple, une manivelle 48 portée par un arbre 49 monté susceptible de tourner dans des paliers portés par le berceau 40.The power unit 43 , mounted on the cradle 40 by a hinge 43a , comprises a movable control member 46 which is, for example, analogous to the rod of a jack, oriented to attack a transmission 47 which is preferably designed to introduce a transformation of the alternating rectilinear displacement of the rod 46 . The transmission 47 comprises, for example, a crank 48 carried by a shaft 49 mounted capable of rotating in bearings carried by the cradle 40 .

La transmission 47 est conçue pour commander, simultanément et en synchronisme, deux systèmes articulés latéraux 50 composés chacun de deux jeux de leviers 51 et 52. Le premier jeu de leviers 51 comprend un levier coudé 53 monté par un point d'articulation 54 pour tourner sur le berceau 40. L'axe de rotation 54 peut être confondu avec l'arbre 49 et dans un tel cas, la manivelle 48 est assimilable à l'une des branches de chacun des leviers coudés 53. Il doit être considéré qu'une disposition différente pourrait aussi intervenir consistant, par exemple, à lier la tige 46 du groupe de motorisation 43 avec l'arbre 49 qui assurerait une liaison physique entre les branches correspondantes des deux leviers latéraux 53.The transmission 47 is designed to control, simultaneously and in synchronism, two lateral articulated systems 50 each composed of two sets of levers 51 and 52 . The first set of levers 51 comprises an angled lever 53 mounted by a point of articulation 54 to rotate on the cradle 40 . The axis of rotation 54 can be merged with the shaft 49 and in such a case, the crank 48 can be likened to one of the branches of each of the bent levers 53 . It should be considered that a different arrangement could also occur, consisting, for example, in connecting the rod 46 of the power unit 43 with the shaft 49 which would provide a physical connection between the corresponding branches of the two lateral levers 53 .

Dans tous les cas de construction possible, les leviers coudés 51 comportent des branches solidaires angulairement, de telle sorte que la seconde branche, désignée par la référence 55, se trouve liée par un point d'articulation 56 à une bielle 57 elle-même liée au second jeu de levier 52.In all possible construction cases, the angled levers 51 comprise angularly fixed branches, so that the second branch, designated by the reference 55 , is linked by a point of articulation 56 to a connecting rod 57 itself linked to the second set of lever 52 .

La fig. 2 met plus précisément en évidence que le second jeu 52 comprend un levier coudé 58 qui est monté par un point d'articulation 59 sur le longeron 16. Le levier 58 est articulé par sa petite branche à la bielle 57 par une articulation 60 et par sa grande branche à une biellette 61 au moyen d'une articulation 62. La biellette 61 est liée par une articulation 63 à l'organe de commande manuelle 30, de telle manière que l'articulation 63 se trouve disposée entre le point de pivotement 32 et l'extrémité de la branche 33. Fig. 2 shows more precisely that the second set 52 comprises an angled lever 58 which is mounted by a hinge point 59 on the side member 16 . The lever 58 is articulated by its small branch to the rod 57 by a joint 60 and by its large branch to a rod 61 by means of a joint 62 . The link 61 is linked by an articulation 63 to the manual control member 30 , so that the articulation 63 is located between the pivot point 32 and the end of the branch 33 .

Le dispositif d'assistance motorisée en liaison avec un fauteuil du type décrit ci-dessus, fonctionne de la façon suivante, à partir de la position correspondante à un état stable d'abaissement de la structure articulée 12.The motorized assistance device in connection with a chair of the type described above operates as follows, from the position corresponding to a stable state of lowering of the articulated structure 12 .

Lorsque l'utilisateur désire passer en position de verticalisation, il appuie sur l'organe de commande approprié du boîtier 44 pour assurer l'alimentation du groupe de motorisation 43 dans le sens pour lequel la tige 46 effectue sa course d'extension. Le ou les leviers 53 des premiers jeux 51, pivotent alors dans le sens de la flèche f₃ et poussent les biellettes 57 qui font pivoter les leviers 58 des jeux 52 dans le sens de la flèche f₄. En raison du verrouillage géométrique établi, l'action des biellettes 57 n'a pas d'incidence immédiate sur le pivotement de la structure articulée 12 sur les points d'articulation 15 et fait uniquement pivoter les leviers coudés 58 qui, par leur grande branche, agissent en traction sur les biellettes 61. Les organes de commande 30 sont astreints à pivoter dans le sens de la flèche f₁, de sorte que les points d'articulation 35 s'abaissent et font passer les biellettes 36 dans la position illustrée par la figure 4, dans laquelle les points de pivotement 32 sont placés relativement au dessus de ces biellettes en libérant ainsi le verrouillage géométrique précédemment établi. Dans cette position, l'action de poussée des biellettes 57, tout en produisant le pivotement des leviers 58, assure l'élévation de l'assise 13 dans le sens de la flèche f₅ en association avec la restitution de travail emmagasiné par le ou les organes élastiques 27. La structure articulée 12 est ainsi progressivement amenée dans une position d'élévation intermédiaire telle qu'illustrée par la fig 5. When the user wishes to switch to the verticalization position, he presses on the appropriate control member of the housing 44 to supply power to the motorization group 43 in the direction for which the rod 46 performs its extension stroke. The lever or levers 53 of the first games 51 then pivot in the direction of the arrow f₃ and push the rods 57 which rotate the levers 58 of the games 52 in the direction of the arrow f₄ . Due to the geometrical locking established, the action of the rods 57 does not have an immediate impact on the pivoting of the articulated structure 12 on the articulation points 15 and only rotates the bent levers 58 which, by their large branch , act in traction on the rods 61 . The control members 30 are required to pivot in the direction of the arrow f₁ , so that the articulation points 35 are lowered and cause the connecting rods 36 to pass into the position illustrated in FIG. 4 , in which the pivot points 32 are placed relatively above these rods, thereby releasing the geometric lock previously established. In this position, the pushing action of the rods 57 , while producing the pivoting of the levers 58 , ensures the elevation of the seat 13 in the direction of the arrow f₅ in association with the restitution of work stored by the or the elastic bodies 27 . The articulated structure 12 is thus gradually brought into an intermediate elevation position as illustrated in FIG. 5.

En fin d'élévation illustrée par la fig. 6, l'action de la tige 46 se heurte à une impossibilité de développement supplémentaire de la structure articulée 12 amenée à prendre appui sur le sol S par le repose-pieds 22.At the end of the elevation illustrated in FIG. 6, the action of the rod 46 comes up against an impossibility of further development of the articulated structure 12 brought to bear on the ground S by the footrest 22 .

Dans cet état, les biellettes 57 agissent uniquement pour faire tourner les leviers coudés 58 des deux jeux 52, de façon à forcer la rotation des leviers 31 dans le sens de la flèche f₆ (fig. 6) pour faire passer l'axe d'articulation 35 au-delà de la ligne fictive passant par les points de pivotement 32 et 37, comme cela est illustré par la fig 2. Dans cette position, le verrouillage géométrique est intervenu pour stabiliser la structure articulée 12 dans un état de verticalisation de sécurité pour le sujet.In this state, the links 57 act only to rotate the bent levers 58 of the two sets 52 , so as to force the rotation of the levers 31 in the direction of the arrow f₆ (fig. 6) to pass the axis of articulation 35 beyond the fictitious line passing through the pivot points 32 and 37 , as illustrated in FIG 2 . In this position, the geometric locking intervened to stabilize the articulated structure 12 in a safe verticalization state for the subject.

Lorsqu'il convient de commander la course d'abaissement de la structure articulée 12, le sujet agit sur le boîtier 44 pour commander l'alimentation inverse du groupe de motorisation 43 afin de solliciter la tige 46 en course de rétraction.When it is appropriate to control the lowering stroke of the articulated structure 12 , the subject acts on the housing 44 to control the reverse supply of the power unit 43 in order to urge the rod 46 in the retraction stroke.

Un tel déplacement de la tige 46 produit, tout d'abord, le déverrouillage de la position verticalisation par déplacement de l'articulation 35 en deçà de la ligne fictive joignant les points de pivotement 32 et 37.Such displacement of the rod 46 produces, first of all, the unlocking of the verticalization position by displacement of the articulation 35 below the fictitious line joining the pivot points 32 and 37 .

A partir de cet état illustré par la fig. 6, l'entrainement des ensembles de manoeuvre 30 s'effectue alors concomitamment à l'abaissement de l'assise par pivotement sur les axes frontaux 15, ramenant la structure articulée 12 dans la position intérmédaire, selon la fig. 5, pour atteindre, ensuite, selon un principe de fonctionnement inverse à ce qui est décrit précédemment, l'état d'abaissement selon la fig. 4 puis finalement l'état stable verrouillé en position abaissée telle qu'illustrée par la fig 1.From this state illustrated in FIG. 6 , the drive of the operating assemblies 30 is then carried out concomitantly with the lowering of the seat by pivoting on the front axes 15 , bringing the articulated structure 12 back to the intermediate position, according to FIG. 5 , to reach, then, according to an operating principle opposite to what is described above, the lowering state according to FIG. 4 then finally the stable state locked in the lowered position as illustrated in FIG . 1 .

Dans ce qui précède, il est indiqué que le dispositif selon l'invention est prévu pour fournir, lorsque cela est nécessaire, une assistance motorisée à un fauteuil verticalisateur ou élévateur à commande manuelle. Il est donc particulièrement prévu selon l'invention une adaptation amovible, rapide, simple et efficace du dispositif sur le châssis 2. A cet effet, les systèmes articulés 50 sont réalisés préférentiellement de telle manière qu'il soit possible de rompre facilement la liaison entre les deux jeux 51 et 52.In the foregoing, it is indicated that the device according to the invention is intended to provide, when necessary, motorized assistance to a stand-up or manual lift chair. There is therefore particularly provided according to the invention a removable, rapid, simple and effective adaptation of the device on the chassis 2 . To this end, the articulated systems 50 are preferably made in such a way that it is possible to easily break the connection between the two sets 51 and 52 .

Les fig. 7 et 8 montrent un tel exemple de réalisation, consistant à prévoir sur la petite branche de chaque levier coudé 58 un tourillon 70 pour l'engagement de l'extrémité correspondante de la bielle 57. L'immobilisation de la bielle 57 sur le tourillon est, par exemple, assurée par une patte 71 montée mobile sur un axe 72 du levier 58 et comportant à son extremité opposée une encoche 73 destinée à chevaucher le tourillon 70 après mise en place de la bielle 57. Figs. 7 and 8 show such an exemplary embodiment, consisting in providing on the small branch of each bent lever 58 a pin 70 for engaging the corresponding end of the rod 57 . The immobilization of the connecting rod 57 on the pin is, for example, ensured by a tab 71 movably mounted on an axis 72 of the lever 58 and comprising at its opposite end a notch 73 intended to overlap the pin 70 after installation of the connecting rod 57 .

De cette manière, après rotation libre commandée dans le sens de la flèche f₇ de la patte 71, il devient possible, par flexion dans le sens de la flèche f₈, de dégager la bielle 57 en laissant subsister sur la structure articulée les deux jeux 52 constitutifs des systèmes 50. L'ensemble du dispositif peut alors être extrait du châssis 2 par démontage du berceau 40 emportant avec lui le groupe de motorisation 43, la transmission 47, le ou les deux jeu(x) de leviers 51 et les bielles 57.In this way, after free rotation controlled in the direction of the arrow f₇ of the tab 71 , it becomes possible, by bending in the direction of the arrow f₈ , to release the connecting rod 57 while allowing the two games to remain on the articulated structure 52 of the systems 50 . The entire device can then be removed from the chassis 2 by dismantling the cradle 40 taking with it the power unit 43 , the transmission 47 , the one or two set (s) of levers 51 and the connecting rods 57 .

Les fig. 9 à 11 montrent une possibilité d'adaptation rapide du berceau 40 sur le châssis 2, plus particulièrement, lorsque ce dernier est constitué sous une forme pliante tel que cela est fréquemment le cas pour ce qui concerne les fauteuils roulants. Dans un tel cas, les longerons 5a, solidarisés par les montants 3 et 4, sont réunis également par un ou plusieurs jeux de ciseaux 80 associés à une ou plusieurs barre d'accouplement 81. La mise en place du berceau 40 s'effectue, alors, lorsque le châssis 2 est dans une position partiellement pliée, comme illustrée par la fig. 9, de manière que l'écartement transversal entre les longerons 5a soit inférieur à l'écartement fixe entre les organes 41 qui peuvent avantageusement être constitués, comme dit précédemment, par des pattes ou mains coudées. De cette manière, il est possible de disposer aisément le berceau 40 dans le plan des longerons 5a, d'assurer son engagement latéral sur l'un de ces derniers et de commander par action manuelle, notamment sur les barres d'accouplement 81, une ouverture transversale du châssis conduisant à l'engagement simultané des deux longerons 5a dans les organes 41. Figs. 9 to 11 show a possibility of rapid adaptation of the cradle 40 on the chassis 2 , more particularly, when the latter is formed in a folding form such as is frequently the case with regard to wheelchairs. In such a case, the longitudinal members 5a , secured by the uprights 3 and 4 , are also joined by one or more sets of scissors 80 associated with one or more coupling rod 81 . The positioning of the cradle 40 takes place, then, when the chassis 2 is in a partially folded position, as illustrated in FIG. 9 , so that the transverse spacing between the side members 5a is less than the fixed spacing between the members 41 which may advantageously be constituted, as said above, by legs or bent hands. In this way, it is possible to easily arrange the cradle 40 in the plane of the side members 5a , to ensure its lateral engagement on one of the latter and to control by manual action, in particular on the coupling bars 81 , a transverse opening of the chassis leading to the simultaneous engagement of the two longitudinal members 5a in the members 41 .

L'invention n'est pas limitée aux exemples décrits et représentés car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the examples described and shown since various modifications can be made thereto without departing from its scope.

Claims (15)

1 - Dispositif d'assistance motorisée, adaptable sur un fauteuil élévateur qui comprend un châssis 2 supportant une structure 12 articulée reliée audit châssis par au moins un ensemble de manoeuvre manuelle 30 caractérisé en ce que le dispositif comprend : - un berceau porteur 40 destiné à être adapté sur le châssis 2. - un groupe de motorisation 43 monté sur le berceau et comportant un organe mobile 46, à déplacement réversible, lié à une transmission 47 portée par le berceau. - au moins un système articulé 50 attaqué par la transmission et comprenant un premier jeu 51 de leviers destiné à agir sur la structure articulée, et un second jeu 52 de leviers actionné par le premier et destiné à agir sur l'ensemble de manoeuvre. - et un boîtier 44 de commande du fonctionnement du groupe de motorisation. 1 - Motorized assistance device, adaptable to a lift chair which comprises a chassis 2 supporting an articulated structure 12 connected to said chassis by at least one manual operating assembly 30 characterized in that the device comprises: - a carrying cradle 40 intended to be adapted to the chassis 2 . - A power unit 43 mounted on the cradle and comprising a movable member 46 , with reversible displacement, linked to a transmission 47 carried by the cradle. - At least one articulated system 50 attacked by the transmission and comprising a first set 51 of levers intended to act on the articulated structure, and a second set 52 of levers actuated by the first and intended to act on the operating assembly. - And a box 44 for controlling the operation of the power unit. 2 - Dispositif selon la revendication 1 caractérisé en ce que la transmission agit sur deux systèmes articulés latéraux 50. 2 - Device according to claim 1 characterized in that the transmission acts on two lateral articulated systems 50 . 3 - Dispositif selon la revendication 1 ou 2 caractérisé en ce que la transmission assure une fonction de transformation du mouvement de l'organe mobile 46 du groupe 43 de motorisation. 3 - Device according to claim 1 or 2 characterized in that the transmission provides a function of transformation of the movement of the movable member 46 of the group 43 of motorization. 4 - Dispositif selon la revendication 1 caractérisé en ce que le groupe 43 est du type électrique réversible, est monté articulé sur le berceau 40 et comporte un accumulateur d'énergie intégré rechargeable. 4 - Device according to claim 1 characterized in that the group 43 is of the reversible electrical type, is mounted articulated on the cradle 40 and comprises an integrated rechargeable energy accumulator. 5 - Dispositif selon la revendication 1 caractérisé en ce que chaque système articulé 50 comprend un premier jeu 51 de leviers comportant, un levier coudé 53 monté pivotant sur le berceau et lié par une branche à la transmission47, et par l'autre à une bielle 57 qui est montée pivotante sur le second jeu 52 de leviers. 5 - Device according to claim 1 characterized in that each articulated system 50 comprises a first set 51 of levers comprising, an angled lever 53 pivotally mounted on the cradle and connected by a branch to the transmission 47 , and by the other to a connecting rod 57 which is pivotally mounted on the second set 52 of levers. 6 - Dispositif selon la revendication 1 ou 5 caractérisé en ce que chaque système articulé 50 comprend un second jeu 52 de leviers, comportant un levier coudé 58 articulé sur la structure 12 et lié par l'une des branches à la bielle 57, et par l'autre à une biellette 61 montée articulée sur l'ensemble de manoeuvre 30 correspondant. 6 - Device according to claim 1 or 5 characterized in that each articulated system 50 comprises a second set 52 of levers, comprising an angled lever 58 articulated on the structure 12 and connected by one of the branches to the rod 57 , and by the other to a rod 61 mounted articulated on the assembly of corresponding operation 30 . 7 - Dispositif selon la revendication 6 caractérisé en ce que la biellette 61 est montée articulée sur l'ensemble de manoeuvre 30 au moyen d'une articulation 63 située entre le point 32 de pivotement de l'ensemble sur la structure et l'organe d'actionnement manuel 33. 7 - Device according to claim 6 characterized in that the rod 61 is mounted articulated on the operating assembly 30 by means of a hinge 63 located between the point 32 of pivoting of the assembly on the structure and the member d manual actuation 33 . 8 - Dispositif selon l'une des revendications 1 ou 6 caractérisé en ce que le premier jeu 51 de leviers est lié au second jeu par un moyen de démontage rapide 70, 71. 8 - Device according to one of claims 1 or 6 characterized in that the first set 51 of levers is linked to the second set by a quick disassembly means 70 , 71 . 9 - Dispositif selon la revendication 1 caractérisé en ce que le berceau 40 comporte des moyens 41 de fixation amovible sur le châssis. 9 - Device according to claim 1 characterized in that the cradle 40 comprises means 41 for removable attachment to the chassis. 10 - Fauteuil élévateur pour handicapé ou invalide, du type comprenant un châssis 2 supportant une structure articulée 12 formée par un dossier 20, une assise 13 et un repose-pieds 22, articulés dans le prolongement l'un de l'autre, ledit fauteuil comportant au moins un organe élastique 27 interposé entre la structure articulée et le châssis, et au moins un ensemble de manoeuvre 30 qui est interposé entre la structure et le châssis sur lesquels il est articulé et qui possède un organe de commande manuelle 33, caractérisé en ce qu'il comporte un dispositif d'assistance motorisée comprenant : - un berceau 40 adapté sur le châssis 2, - un groupe de motorisation 43 monté articulé sur le berceau 40 et comportant un organe mobile 46 , à déplacement réversible, lié à une transmission 47 portée par le berceau, - au moins un système articulé 50, attaqué par la transmission, et comprenant un premier jeu 51 de leviers lié à la transmission, et un second jeu 52 de leviers lié au premier et monté articulé sur l'assise 12 et sur l'organe de commande manuelle 31, - et un boîtier 44 de commande du groupe de motorisation placé à la disposition de l'utilisateur. 10 - Lifting chair for disabled or disabled, of the type comprising a frame 2 supporting an articulated structure 12 formed by a backrest 20 , a seat 13 and a footrest 22 , articulated in the extension of one another, said chair comprising at least one elastic member 27 interposed between the articulated structure and the frame, and at least one operating assembly 30 which is interposed between the structure and the frame on which it is articulated and which has a manual control member 33 , characterized in what it includes a motorized assistance device comprising: - a cradle 40 adapted to the chassis 2 , a motorization group 43 mounted articulated on the cradle 40 and comprising a movable member 46 , with reversible displacement, linked to a transmission 47 carried by the cradle, - At least one articulated system 50 , attacked by the transmission, and comprising a first set 51 of levers linked to the transmission, and a second set 52 of levers linked to the first and mounted articulated on the seat 12 and on the member manual control 31 , - And a control unit 44 for the motorization group placed at the disposal of the user. 11 - Fauteuil élévateur selon la revendication 10 caractérisé en ce que le dispositif d'assistance motorisée comprend deux systèmes articulés latéraux 50. 11 - Lift chair according to claim 10 characterized in that the motorized assistance device comprises two lateral articulated systems 50 . 12 - Fauteuil élévateur selon la revendication 10 ou 11 caractérisé en ce que chaque système articulé 50 comprend un premier jeu 51 de leviers, composé d'un levier coudé 53 articulé sur le berceau 40 et lié à la transmission 47 et une bielle 57 articulée sur le levier coudé, et un second jeu 52 de leviers composé d'un levier coudé 58 articulé sur l'assise 12 et lié par une branche à la bielle 57, et par l'autre à une biellette 61 articulée sur l'ensemble de manoeuvre 30. 12 - Lift chair according to claim 10 or 11 characterized in that each articulated system 50 comprises a first set 51 of levers, composed of an elbow lever 53 articulated on the cradle 40 and linked to the transmission 47 and a connecting rod 57 articulated on the elbow lever, and a second set 52 of levers composed of a bent lever 58 articulated on the seat 12 and linked by a branch to the rod 57 , and by the other to a rod 61 articulated on the operating assembly 30 . 13 - Fauteuil élévateur selon l'une des revendications 10 à 11 caractérisé en ce que chaque système articulé 50 comprend une biellette 61 qui est montée sur l'ensemble de manoeuvre 30 par une articulation 63 située entre un point de pivotement 32 de l'ensemble sur l'assise et un organe de commande manuelle 33 qu'il comporte. 13 - Lift chair according to one of claims 10 to 11 characterized in that each articulated system 50 comprises a link 61 which is mounted on the operating assembly 30 by a hinge 63 located between a pivot point 32 of the assembly on the seat and a manual control member 33 which it comprises. 14 - Fauteuil élévateur selon l'une des revendications 10 à 13 caractérisé en ce que chaque système articulé 50 comprend une liaison 70,71 à démontage rapide entre la bielle et le levier coudé du second jeu, et en ce que le berceau est adapté de façon amovible sur le châssis. 14 - Lifting chair according to one of claims 10 to 13 characterized in that each articulated system 50 comprises a connection 70 , 71 with quick disassembly between the connecting rod and the bent lever of the second set, and in that the cradle is adapted to removable on the chassis. 15 - Fauteuil-élévateur selon l'une des revendications 10 ou 14 caractérisé en ce que le berceau est adapté à la partie arrière basse du châssis et en dessous du niveau de l'axe de rotation des roues arrières du fauteuil. 15 - Lift chair according to one of claims 10 or 14 characterized in that the cradle is adapted to the lower rear part of the chassis and below the level of the axis of rotation of the rear wheels of the chair.
EP93420368A 1992-09-15 1993-09-14 Motorised assistance device for a lifting chair and lifting chair using such device Withdrawn EP0588735A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9211231 1992-09-15
FR9211231A FR2695554B1 (en) 1992-09-15 1992-09-15 Motorized assistance device, adaptable to a lift chair and lift chair by applying.

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EP0588735A1 true EP0588735A1 (en) 1994-03-23

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US (1) US5556121A (en)
EP (1) EP0588735A1 (en)
JP (1) JPH0716260A (en)
CA (1) CA2106104A1 (en)
FR (1) FR2695554B1 (en)

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Also Published As

Publication number Publication date
CA2106104A1 (en) 1994-03-16
JPH0716260A (en) 1995-01-20
FR2695554A1 (en) 1994-03-18
FR2695554B1 (en) 1994-12-23
US5556121A (en) 1996-09-17

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