EP2004124B1 - Multi-position chair for handicapped user - Google Patents

Multi-position chair for handicapped user Download PDF

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Publication number
EP2004124B1
EP2004124B1 EP06726299A EP06726299A EP2004124B1 EP 2004124 B1 EP2004124 B1 EP 2004124B1 EP 06726299 A EP06726299 A EP 06726299A EP 06726299 A EP06726299 A EP 06726299A EP 2004124 B1 EP2004124 B1 EP 2004124B1
Authority
EP
European Patent Office
Prior art keywords
seat
articulated
footrest
seat structure
wheelchair according
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.)
Not-in-force
Application number
EP06726299A
Other languages
German (de)
French (fr)
Other versions
EP2004124A1 (en
Inventor
François Porcheron
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
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 Lifestand "Vivre Debout", Lifestand Vivre Debout filed Critical Lifestand "Vivre Debout"
Publication of EP2004124A1 publication Critical patent/EP2004124A1/en
Application granted granted Critical
Publication of EP2004124B1 publication Critical patent/EP2004124B1/en
Not-in-force 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
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/042—Front wheel drive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/006—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs convertible to stretchers or beds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1059—Arrangements for adjusting the seat adjusting the height of the seat
    • 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
    • A61G5/128—Rests specially adapted therefor, e.g. for the head or the feet for feet
    • 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
    • A61G2200/00—Information related to the kind of patient or his position
    • A61G2200/30—Specific positions of the patient
    • A61G2200/36—Specific positions of the patient standing
    • 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
    • A61G2203/00—General characteristics of devices
    • A61G2203/10—General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
    • A61G2203/14—Joysticks
    • 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
    • A61G2203/00—General characteristics of devices
    • A61G2203/70—General characteristics of devices with special adaptations, e.g. for safety or comfort
    • A61G2203/74—General characteristics of devices with special adaptations, e.g. for safety or comfort for anti-shear when adjusting furniture
    • 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

Definitions

  • the invention relates to the technical field of multiposition seats for disabled allowing a user to move, for example, from a low sitting position to a high sitting position.
  • the invention relates to the field of wheelchairs for persons with disabilities or reduced mobility which include elevating means ensuring a user elevation placed on the seat, so as to enable him, by for example, to reach objects placed high while sitting.
  • an international application WO 92/15271 has, for example, proposed a wheelchair for disabled with a wheeled chassis.
  • the chair is further conventionally equipped with a seat structure that includes at least one footrest, seat and backrest.
  • the chair comprises, finally, lifting means, interposed between the frame and the seat structure, to allow a change in the height of the seat structure.
  • the lifting means comprise, for this purpose, an articulated assembly composed, on the one hand, of a parallelogram, deformable in a vertical plane, interposed between the frame and the seat structure and, on the other hand, of a mechanical assistance means adapted to allow, by a deformation of the parallelogram, a change in the seat height.
  • Such a chair fully fulfills its function of raising-lowering the user.
  • it appeared that such a chair was not able to allow easy modification of the inclination or the general base of the seat structure to, for example, adopt the seating structure a reclined position and allow relaxation for the wheelchair user, while decreasing the pressure on the ischium and buttocks to reduce the risk of pressure ulcers and shear effects due to changes in position.
  • the invention aims to overcome this disadvantage by proposing means for tilting the entire seating structure to ensure a modification of the overall inclination or the attitude of the latter, in a simple manner, without profound modification of the chair's design.
  • the implementation of the base associated with the mechanical assistance means makes it possible, in a very simple way, to modify the overall inclination of the seat structure, independently of the configuration adopted for the latter and, in particular, any by being able to maintain the desired seat height.
  • the means for mechanical assistance of the inclination means can be made in any suitable manner and, for example, comprise a manually operated system, such as, for example, a screw jack driven by means of a flywheel equipped with a crank or, preferably, be motorized by being, for example, in the form of an electric jack interposed between the base and the frame.
  • a manually operated system such as, for example, a screw jack driven by means of a flywheel equipped with a crank or, preferably, be motorized by being, for example, in the form of an electric jack interposed between the base and the frame.
  • the articulated assembly of the elevation means comprises at least two deformable polygons in two parallel vertical planes.
  • these deformable polygons are quadrilaterals which will be chosen, advantageously but not strictly necessary, to be parallelograms.
  • the latter is designed to form what could be called a multiposition chair and the seat structure is then chosen to be articulated.
  • Such an articulated seat structure makes it possible, for example, by modifying the inclination with respect to the seat, on the one hand, of the backrest and, on the other hand, of the footrest, of offering the possibility of placing the seat structure in an elongate position by placing, for example, the footrest, the seat and the backrest, in the extension of each other, in a substantially horizontal plane.
  • the means for tilting or modifying the overall inclination of the seat structure can then be very advantageously used to place the seat structure in an inclined position towards the before or, on the contrary, tilted backwards.
  • claping a technique of respiratory physiotherapy
  • the seat structure and the mechanical assistance means are adapted to allow the passage of the seat structure in a standing position, in which the footrest, the seat and the backrest are placed in the extension of each other, in a substantially vertical plane.
  • the combination of the articulated nature of the seat structure and the implementation of the inclination means of the latter makes it possible, when the user is in a vertical position, to adopt a slight inclination towards the rear the vertical seating structure, so as to provide the user with a sense of security.
  • the seat structure can also be adapted to allow, on the one hand, the passage of the seat structure in the vertical position and, on the other hand, the passage of the same structure sitting in the so-called elongated position.
  • the backrest arm is formed by a motorized jack constituting a mechanical assistance means for modifying the relative inclination of the backrest relative to the seat.
  • the leg arm is formed by a motorized cylinder constituting a mechanical assistance means for modifying the relative inclination of the footrest relative to the seat.
  • the chair according to the invention is intended to allow movement of the user and, for this purpose, it forms a wheelchair whose chassis comprises at least three wheels.
  • at least one of the wheels will preferably, but not necessarily, motorized, in which case its operation will be controlled by means of the decontrol unit mentioned above.
  • An armchair according to the invention as illustrated in Fig. 1 to 6 , comprises a support frame 1 on which is adapted a seat structure 2 .
  • the chassis 1 comprises two front-wheel-drive wheels 3 , each supported by a suspension arm 4 .
  • the chassis 1 further comprises two rear wheels 5 , said to be crazy, insofar as they are connected to the chassis 1 by a pivot 6 of substantially vertical axis.
  • each drive wheel 3 is equipped with an electric geared motor 7 powered by a set of batteries 8 and controlled by a control unit 9 provided with a handle 10 .
  • the control unit 9 allows, by means of the lever 10 , to ensure synchronized control or not the driving wheels 4 so as to advance, backward, turn left or right, the chair according to the invention.
  • the carrier frame 1 is not strictly necessary for the invention and, thus, the carrier frame could include no motorized wheel and be, for example, designed for a manual movement.
  • the seat structure 2 comprises a footrest 15 , a seat 16 and a backrest 17 .
  • the seat structure 2 is articulated so as to allow a modification of the relative inclination of the backrest 17 with respect to the seat 16 and / or a modifying the relative inclination of the footrest 15 with respect to the seat 16 .
  • the seat structure 2 comprises a cross member 19 which is located in the front region of the chair.
  • the seat structure also comprises a structure 20 for supporting the seat 16 , which is composed of at least one and, according to the illustrated example, of two longitudinal members 21 which are integral with the seat and which, according to the illustrated example, help define a support framework for the latter.
  • the longitudinal members 21 are made in two parts 21 1 , 21 2 to allow adjustment of the seat depth according to the size and build of the wheelchair user.
  • the front portions 21 1 of the two longitudinal members 21 are articulated at the front on the anterior cross member 19 via pivots 22 of substantially horizontal axes.
  • the articulated support structure 20 of the seat 16 further comprises a motorized telescopic ram 23 , constituted, for example but not exclusively, by an electric screw jack.
  • the motorized telescopic ram 23 is then articulated at the front on the anterior cross member 19 by a pivot 24 of axis also horizontal and, at the rear, on the longitudinal members 21 and / or as illustrated on an element such as a cross member 25 connected to the front portions 21 1 of the two side members 21 and constituting the articulated structure 20 for supporting the seat 16.
  • the telescopic jack motorized 23 is then attached to the cross member 25 via a pivot 26 of horizontal axis.
  • the seat structure 2 also comprises an articulated structure 30 for supporting the backrest 17.
  • the backrest support structure 30 comprises at least one and, according to the illustrated example, two uprights 31 which are secured to the backrest 17 and which are articulated on the rear parts 21 2 of the longitudinal members 21.
  • the uprights 31 are more particularly connected by a cross member 32 which is then itself hinged to the longitudinal members 21 of the seat support structure 20, via pivots 33 of horizontal axes.
  • the articulated support structure 30 of the backrest 17 further comprises a backrest arm 35 placed under the seat 16, as is more particularly apparent from the Fig. 4 .
  • This backrest arm 35 is preferably, but not necessarily, made in two parts, respectively anterior 36 and posterior 37, which allow permanent adjustment of the length of the backrest arm 35, in particular as a function of the seat depth.
  • the anterior portion 36 of the backrest arm is hinged to the anterior cross member 19, via a pivot of horizontal axis 39, while the rear portion 37 is articulated by a pivot 40, also of substantially horizontal axis , on the uprights 31 or an integral element thereof, in this case a finger 32 1 forming an integral part of the crossbar 32.
  • the length of the backrest arm 35 is adjustable so as to adjust the relative inclination of the backrest 17 relative to the seat 16.
  • the part front 36 of the arm 35 is formed by a telescopic motorized jack, such as, for example, an electric screw jack whose operation is controlled by the control unit 9.
  • the backrest 17 is, preferably, fitted to each upright 31 by means of a slider 42 which is further connected to the seat support structure 20 by means of a link 43.
  • the seat structure 2 also comprises an articulated structure 50 for supporting the footrest 15.
  • the structure 50 then comprises at least one and, according to the illustrated example, exactly one leg segment 51 which is connected to the footrest 15 and which is articulated on the anterior cross member 19 by means of a pivot 52 of horizontal axis.
  • the articulated footrest support structure 50 also comprises at least and, according to the illustrated example, exactly one leg arm 53 which is articulated, on the one hand, on the anterior cross member by a pivot 54 of horizontal axis and, on the other hand, on the tibial segment 51 also via a pivot 55 of axis also horizontal.
  • the leg arm 53 has an adjustable length, to allow a modification or adjustment of the relative inclination or inclination of the leg segment 51 with respect to the seat 16 and therefore, a modification of the position relative angle of the footrest 15 with respect to the seat 16.
  • the leg arm 53 is constituted by a motorized telescopic jack, such as an electric screw jack, controlled by the unit 9, as will appear more particularly by the after.
  • the footrest 15 is, according to the example illustrated and preferably, adapted on the tibial segment 51 via a carriage 56 .
  • this carriage 56 is then connected, by connecting means 57 , to the seat 16 or the seat support structure 20 , so as to allow an automatic modification of the distance between the seat 16 and the footrest 15 , during the modification of the relative inclination of the tibial segment 51 with respect to the seat 16 .
  • the chair further comprises elevator means 60 , interposed between the frame 1 and the seat structure 2 to allow a change in the height of the seat structure.
  • the lifting means could be made in different ways and, for example, constituted by a single jack, interposed between the frame 1 and the seat structure 2 and, for example, between the frame and the front cross member 2.
  • the elevator means 60 comprise at least one articulated assembly which consists of at least one, according to the illustrated example, two deformable polygons 61 in two parallel vertical planes.
  • each deformable polygon 61 has the shape of a deformable parallelogram whose two long sides are formed by two segments or lower arm 62 i and upper 62 s which are hinged forward on the anterior cross member 19 by pivots 63 i , 63 s of substantially horizontal axes.
  • the anterior cross member 19 then forms a small side of the deformable parallelograms 61 .
  • the axis of the pivots 63 s 62 s of the upper arms is coincident with the axis of the pivots 22 of the articulated structure 20 seat support.
  • the segments or arms 62 i , 62 s are, moreover, hinged at their posterior end on a base 65 , integral with the chassis and hinged to the latter by means of a pivot of substantially horizontal axis 66 .
  • the base 65 comprises two spreaders 67 which each form the short side of a deformable parallelogram 61 , being connected to the corresponding segments 62 i , 62 s by pivots 68 i , 68 s of axis substantially horizontal. It will be noticed that, according to the illustrated example, the articulation pivots 68 i , lower segments 62 i with the rudder corresponding 67 , have an axis coincident with the axis of oscillation of the base. 65 on the chassis 62 .
  • the elevation means further comprise a mechanical assistance means 70 interposed between the base 65 and the upper segment 62 s left to allow, by a deformation of the deformable polygons or parallelograms 61 , a modification of the height of the 'seated.
  • the mechanical assistance means 70 could be interposed between the base and another segment of the deformable parallelograms 61 .
  • the mechanical assistance means 70 are constituted by a motorized telescopic jack, such as an electric screw jack, controlled by the unit 9 .
  • the chair 2 comprises a mechanical assistance means, such as, for example, an electric motor screw jack 73 , interposed between the frame 2 and the base 65 , so as to modify the relative angle.
  • a mechanical assistance means such as, for example, an electric motor screw jack 73 , interposed between the frame 2 and the base 65 , so as to modify the relative angle.
  • the base 65 and the cylinder 73 together define tilting means of the entire seating structure, as will appear later.
  • the chair as described above, operates in the following manner.
  • control unit 9 is then designed to allow individual control of each of these cylinders.
  • the user of the chair according to the invention can control a raising / lowering movement of the entire seating structure by a control of the motorized telescopic ram 70 , called "lift" which ensures a modification of the seat height 16 . It is therefore possible for the wheelchair user to control a passage from the low or normal sitting position as illustrated in FIG. Fig. 1 at the high sitting position as illustrated in Fig. 7
  • the user can also, through the unit 9 , provide a control of the motorized telescopic ram 73 , called plate, and altering the overall inclination or attitude of the seating structure to, for example, tilt it backwards and move into a relaxed position as illustrated in FIG. Fig. 8 .
  • the user can also, by controlling, by means of the control unit 9 , the cylinders 36 and 53 modify the relative inclination of the backrest relative to the seat, as well as the inclination of the footrest relative to the seat, so that it can place the chair according to the invention in different configurations such as semi elongated or, still, completely elongated, as shown in FIG. Fig. 9 configuration in which the backrest 17 , the seat 16 and the footrest 15 are then substantially aligned in a horizontal plane.
  • control unit 9 is adapted to allow automatic passage in the extended position by a coordinated control of the backrest cylinders 36 and footrest 53 .
  • the user still has access to the raising / lowering function and can, for example, by a control of the lift jack 70 choose to place the seat structure in configuration berth at the desired height to allow the transfer of the user of the chair on an examination table or in a bed.
  • the user also has access to the general inclination function of the entire seating structure and can, for example, tilt it backwards, even though is in the sleeping position.
  • This reclining recumbent position called “proclive”, illustrated Fig. 5 and 6 , may be useful for the technique of respiratory physiotherapy called "claping".
  • the chair can, from the normal sitting position Fig. 1 by the sole control of the motorized jack 23 , move to the vertical position 4 .
  • the only control of the motorized telescopic ram 23 allows to move from the sitting position to the vertical position, as illustrated in Fig. 3 and 4 .
  • control unit 9 will then be programmed to ensure that the seat structure 2 is, before the initiation of the vertical movement, located at a height sufficient to prevent any risk of blocking the movement by a contact of the footrest with the ground.
  • the elevation function provided by the lift cylinder 70 , remains accessible.
  • the general inclination function of the entire seat structure is, in the position of verticalization, also accessible by the control of the attitude cylinder 73 , so that it is possible to choose a slightly inclined position backwards helping to give the chair better stability and to bring a sense of security to the wheelchair user who no longer has the use of his lower limbs.
  • control unit 9 is moreover adapted to ensure by a coordinated operation of the verticalizing cylinders 23 , 36 and tilting 53 , an automatic passage of the standing position Fig. 4 in the lying position Fig. 9 and conversely with, optionally, a possibility of stopping in an intermediate position. This movement is then achieved by maintaining the alignment of the footrest, seat and back substantially 'in the same plane.
  • the chair in order to guarantee the safety of use in a vertical position, the chair will be equipped with chest restraint means, not shown and constituted, for example, by a belt or harness, as well as low retaining means. 80 formed, according to the example shown, knee pads coming to apply pressure on the knees, to prevent sagging of the user of the chair in the vertical position.
  • the chair according to the invention comprises two armrests 81 integral with the backrest structure 20 .
  • the control unit 9 is fitted on the armrest 81 on the right.
  • the backrest 17 is connected to the seat support structure 20 by a link 43 .
  • a rigid connection mode is not strictly necessary for the production of a chair according to the invention.
  • the Fig. 10 presents another embodiment of a multiposition chair for the disabled according to the invention which differs from the embodiment as described in connection with the Fig. 1 to 9 in that the backrest 17 is supported by a single upright 90 articulated on the support structure 20 of the seat 16 .
  • the file 17 is then linked to a slider which is movable in the upright 91 .
  • the backrest is further connected to the seat support structure by a flexible belt, not shown, guided by a pulley system, also not shown, so as to ensure an increase in the distance between the backrest 17 and the seat 16 during the transition to the vertical position.
  • the embodiment illustrated in Fig. 10 is also different in that the rear wheels 3 are driving while the front wheels 5 are crazy.
  • the motorized wheelchair shown in Fig. 10 can be described as a powered wheelchair as opposed to an armchair Fig. 1 to 9 which can be described as a traction chair.
  • the placement of motors 7 at the rear allows to roll back the masses and thus to increase the stability of the chair in particular vertical position.

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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)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

According to the invention, the wheelchair is characterized in that it includes means to incline the whole seat structure, and inclining means that are interposed between the chassis and the lifting means and that include at least: a base (65) that is attached to the chassis (1) and that oscillates around a more-or-less horizontal axis, and on which the lifting means are fitted, and a mechanical assistance means that is interposed between the base (65) and the chassis (1) and that is designed to allow modification of the slope of the whole seat structure by rotation of the base (65).

Description

L'invention concerne le domaine technique des sièges multiposition pour handicapés permettant à un utilisateur de passer, par exemple, d'une position assise basse à une position assise haute.The invention relates to the technical field of multiposition seats for disabled allowing a user to move, for example, from a low sitting position to a high sitting position.

Dans une application, préférée mais non exclusive, l'invention concerne le domaine des fauteuils roulants pour personnes handicapées ou à mobilité réduite qui comprennent des moyens élévateurs assurant une élévation de l'utilisateur placé sur l'assise, de manière à lui permettre, par exemple, d'atteindre des objets placés en hauteur tout en restant assis.In a preferred but non-exclusive application, the invention relates to the field of wheelchairs for persons with disabilities or reduced mobility which include elevating means ensuring a user elevation placed on the seat, so as to enable him, by for example, to reach objects placed high while sitting.

Dans le domaine ci-dessus, une demande internationale WO 92/15271 a, par exemple, proposé un fauteuil pour handicapé comprenant un châssis porteur sur roues. Le fauteuil est, en outre, équipé de manière classique d'une structure d'assise qui comprend au moins un repose-pied, un siège et un dossier. Le fauteuil comprend, enfin, des moyens élévateurs, interposés entre le châssis et la structure d'assise, pour permettre une modification de la hauteur de la structure d'assise.In the above field, an international application WO 92/15271 has, for example, proposed a wheelchair for disabled with a wheeled chassis. The chair is further conventionally equipped with a seat structure that includes at least one footrest, seat and backrest. The chair comprises, finally, lifting means, interposed between the frame and the seat structure, to allow a change in the height of the seat structure.

Selon la demande WO 92/15271 , les moyens élévateurs comprennent, à cet effet, un ensemble articulé composé, d'une part, d'un parallélogramme, déformable dans un plan vertical, interposé entre le châssis et la structure d'assise et, d'autre part, d'un moyen d'assistance mécanique adapté pour permettre, par une déformation du parallélogramme, une modification de la hauteur d'assise.According to demand WO 92/15271 , the lifting means comprise, for this purpose, an articulated assembly composed, on the one hand, of a parallelogram, deformable in a vertical plane, interposed between the frame and the seat structure and, on the other hand, of a mechanical assistance means adapted to allow, by a deformation of the parallelogram, a change in the seat height.

Un tel fauteuil remplit pleinement sa fonction d'élévation-abaissement de l'utilisateur. Cependant, il est apparu qu'un tel fauteuil n'était pas en mesure de permettre une modification aisée de l'inclinaison ou de l'assiette générale de la structure d'assise pour, par exemple, faire adopter à la structure d'assise une position inclinée vers l'arrière et permettre une relaxation à l'utilisateur du fauteuil, tout en diminuant la pression sur les ischions et le fessier pour réduire le risque d'apparition d'escarres et les effets de cisaillement dus aux changements de position.Such a chair fully fulfills its function of raising-lowering the user. However, it appeared that such a chair was not able to allow easy modification of the inclination or the general base of the seat structure to, for example, adopt the seating structure a reclined position and allow relaxation for the wheelchair user, while decreasing the pressure on the ischium and buttocks to reduce the risk of pressure ulcers and shear effects due to changes in position.

D'autres mécanismes, tels que ceux décrits dans US 4,312,500 et US 2003/0227161 ne présentent pas de fonction d'élévation, abaissement.Other mechanisms, such as those described in US 4,312,500 and US 2003/0227161 do not have a function of raising, lowering.

L'invention vise à remédier à cet inconvénient en proposant des moyens d'inclinaison de l'ensemble de la structure d'assise permettant d'assurer une modification de l'inclinaison générale ou de l'assiette de cette dernière, de manière simple, sans modification profonde de la conception du fauteuil.The invention aims to overcome this disadvantage by proposing means for tilting the entire seating structure to ensure a modification of the overall inclination or the attitude of the latter, in a simple manner, without profound modification of the chair's design.

Afin d'atteindre cet objectif, l'invention concerne donc un fauteuil, suivant la revendication 1 pour personne handicapée ou à mobilité réduite, comprenant :

  • un châssis porteur,
  • une structure d'assise qui comprend au moins :
    • ◆ un repose-pied,
    • ◆ un siège,
    • ◆ et un dossier,
  • et des moyens élévateurs, interposés entre le châssis et la structure d'assise, permettant une modification de la hauteur de la structure d'assise.
In order to achieve this objective, the invention therefore relates to a chair, according to claim 1 for a disabled person or a person with reduced mobility, comprising:
  • a carrier chassis,
  • a seating structure that includes at least:
    • ◆ a footrest,
    • ◆ a seat,
    • ◆ and a folder,
  • and elevating means, interposed between the frame and the seat structure, allowing a modification of the height of the seat structure.

selon l'invention, ce fauteuil est caractérisé en ce qu'il comprend des moyens d'inclinaison de l'ensemble de la structure d'assise, moyens d'inclinaison qui sont interposés entre le châssis et la structure d'assise et qui comprennent au moins :

  • une embase, solidaire du châssis, qui oscille autour d'un axe sensiblement horizontal et sur laquelle les moyens élévateurs sont adaptés,
  • et un moyen d'assistance mécanique interposé entre l'embase et le châssis et qui est adapté pour permettre, par une rotation de l'embase, une modification de l'inclinaison de l'ensemble de la structure d'assise, indépendamment de sa configuration.
according to the invention, this chair is characterized in that it comprises means for tilting the entire seating structure, tilting means which are interposed between the frame and the seat structure and which comprise at least :
  • a base, secured to the frame, which oscillates about a substantially horizontal axis and on which the lifting means are adapted,
  • and a mechanical assistance means interposed between the base and the frame and which is adapted to allow, by a rotation of the base, a modification of the inclination of the whole of the seat structure, independently of its configuration.

Selon l'invention, le fauteuil est également caractérisé en ce que les moyens élévateurs comprennent au moins :

  • ◆ un ensemble articulé qui comprend au moins un polygone déformable dans un plan vertical, interposé entre la structure d'assise et l'embase qui définit alors un côté du polygone déformable,
  • ◆ et un moyen d'assistance mécanique adapté pour permettre, par une déformation du polygone, une modification de la hauteur de la structure d'assise.
According to the invention, the chair is also characterized in that the lifting means comprise at least:
  • An articulated assembly which comprises at least one deformable polygon in a vertical plane, interposed between the seat structure and the base which then defines one side of the deformable polygon,
  • ◆ and a mechanical assistance means adapted to allow, by deformation of the polygon, a change in the height of the seat structure.

Ainsi, la mise en oeuvre de l'embase associée aux moyens d'assistance mécanique permet, de manière très simple, de modifier l'inclinaison générale de la structure d'assise, indépendamment de la configuration adoptée pour cette dernière et, notamment, tout en pouvant conserver la hauteur d'assise souhaitée.Thus, the implementation of the base associated with the mechanical assistance means makes it possible, in a very simple way, to modify the overall inclination of the seat structure, independently of the configuration adopted for the latter and, in particular, any by being able to maintain the desired seat height.

Selon l'invention, le moyen d'assistance mécanique des moyens d'inclinaison peut être réalisé de toute façon appropriée et, par exemple, comprendre un système manoeuvré manuellement, tel que, par exemple, un vérin à vis entraîné au moyen d'un volant équipé d'une manivelle ou, de manière préférée, être motorisé en étant, par exemple, réalisé sous la forme d'un vérin électrique interposé entre l'embase et le châssis.According to the invention, the means for mechanical assistance of the inclination means can be made in any suitable manner and, for example, comprise a manually operated system, such as, for example, a screw jack driven by means of a flywheel equipped with a crank or, preferably, be motorized by being, for example, in the form of an electric jack interposed between the base and the frame.

Selon l'invention, afin d'assurer une plus grande stabilité de la structure d'assise par rapport au châssis, l'ensemble articulé des moyens d'élévation comprend au moins deux polygones déformables dans deux plans verticaux parallèles.According to the invention, in order to ensure greater stability of the seat structure relative to the chassis, the articulated assembly of the elevation means comprises at least two deformable polygons in two parallel vertical planes.

Selon l'invention, il est possible d'adopter plusieurs formes pour les polygones déformables mais, de manière préféré, ces polygones déformables sont des quadrilatères qui seront choisis, de manière avantageuse mais non strictement nécessaire, pour être des parallélogrammes.According to the invention, it is possible to adopt several forms for the deformable polygons but, preferably, these deformable polygons are quadrilaterals which will be chosen, advantageously but not strictly necessary, to be parallelograms.

Dans une forme préférée mais non strictement nécessaire de réalisation du fauteuil selon l'invention, ce dernier est conçu de manière à former ce qui pourrait être appelé un fauteuil multiposition et la structure d'assise est alors choisie pour être articulée.In a preferred but not strictly necessary embodiment of the chair according to the invention, the latter is designed to form what could be called a multiposition chair and the seat structure is then chosen to be articulated.

A cet effet, la structure d'assise comprend :

  • des structures de support du dossier, du siège et du repose-pied qui sont articulées pour autoriser une modification de l'inclinaison relative du dossier par rapport au siège et/ou une modification de l'inclinaison relative du repose-pied par rapport au siège,
  • et au moins un moyen d'assistance mécanique, adapté pour assurer une modification de l'inclinaison relative ou de l'angle relatif du dossier par rapport au siège et/ou une modification de l'inclinaison relative ou de l'angle relatif du repose-pied par rapport au siège.
For this purpose, the seat structure comprises:
  • support structures for the backrest, seat and footrest that are hinged to allow a modification of the relative inclination of the backrest relative to the seat and / or a modification of the relative inclination of the footrest with respect to the seat,
  • and at least one mechanical assistance means, adapted to ensure a modification of the relative inclination or of the relative angle of the backrest with respect to the seat and / or a modification of the relative inclination or the relative angle of the seat -feet to the seat.

Une telle structure d'assise articulée permet, par exemple, par la modification de l'inclinaison par rapport au siège, d'une part, du dossier et, d'autre part, du repose-pied, d'offrir la possibilité de placer la structure d'assise dans une position allongée en plaçant, par exemple, le repose-pied, le siège et le dossier, dans le prolongement les uns des autres, dans un plan sensiblement horizontal.Such an articulated seat structure makes it possible, for example, by modifying the inclination with respect to the seat, on the one hand, of the backrest and, on the other hand, of the footrest, of offering the possibility of placing the seat structure in an elongate position by placing, for example, the footrest, the seat and the backrest, in the extension of each other, in a substantially horizontal plane.

De même, il est possible de placer la structure d'assise articulée dans une position de relaxe.Similarly, it is possible to place the articulated seat structure in a relaxed position.

Dans la configuration allongée par exemple, les moyens d'inclinaison ou de modification de l'inclinaison générale de la structure d'assise, peuvent alors être, fort avantageusement, utilisés pour placer la structure d'assise dans une position inclinée, vers l'avant ou, au contraire, inclinée vers l'arrière. Ainsi il est possible de placer l'utilisateur du fauteuil allongé tête en bas, afin de lui appliquer une technique de kinésithérapie respiratoire appelée « claping ».In the elongated configuration for example, the means for tilting or modifying the overall inclination of the seat structure can then be very advantageously used to place the seat structure in an inclined position towards the before or, on the contrary, tilted backwards. Thus it is possible to place the wheelchair user lying upside down, in order to apply a technique of respiratory physiotherapy called "claping".

La combinaison du caractère articulé de la structure d'assise et des moyens d'inclinaison de cette dernière permet de placer le fauteuil, selon l'invention, dans une infinité de configurations, aptes à répondre aux besoins médicaux de l'utilisateur du fauteuil.The combination of the articulated nature of the seat structure and the inclination means of the latter makes it possible to place the chair, according to the invention, in an infinity of configurations, able to meet the medical needs of the chair user.

Dans une forme encore plus particulièrement préférée, la structure d'assise et le moyen d'assistance mécanique sont adaptés pour permettre le passage de la structure d'assise dans une position de verticalisation, dans laquelle de repose-pied, le siège et le dossier sont placés dans le prolongement les uns des autres, dans un plan sensiblement vertical.In a still more particularly preferred form, the seat structure and the mechanical assistance means are adapted to allow the passage of the seat structure in a standing position, in which the footrest, the seat and the backrest are placed in the extension of each other, in a substantially vertical plane.

Ici encore, la combinaison du caractère articulé de la structure d'assise et de la mise en oeuvre des moyens d'inclinaison de cette dernière permet, lorsque l'utilisateur est en position de verticalisation, d'adopter une légère inclinaison vers l'arrière de la structure d'assise verticalisée, de manière à procurer à l'utilisateur un sentiment de sécurité.Here again, the combination of the articulated nature of the seat structure and the implementation of the inclination means of the latter makes it possible, when the user is in a vertical position, to adopt a slight inclination towards the rear the vertical seating structure, so as to provide the user with a sense of security.

Selon l'invention, la structure d'assise peut également être adaptée de manière à permettre, d'une part, le passage de la structure d'assise dans la position de verticalisation et, d'autre part, le passage de cette même structure d'assise dans la position dite allongée.According to the invention, the seat structure can also be adapted to allow, on the one hand, the passage of the seat structure in the vertical position and, on the other hand, the passage of the same structure sitting in the so-called elongated position.

Selon une autre caractéristique de l'invention, le bras de dossier est formé par un vérin motorisé constituant un moyen d'assistance mécanique pour la modification de l'inclinaison relative du dossier par rapport au siège.According to another characteristic of the invention, the backrest arm is formed by a motorized jack constituting a mechanical assistance means for modifying the relative inclination of the backrest relative to the seat.

Dans le même sens, selon une caractéristique de l'invention, le bras de jambier est formé par un vérin motorisé constituant un moyen d'assistance mécanique pour la modification de l'inclinaison relative du repose-pied par rapport au siège.In the same sense, according to a feature of the invention, the leg arm is formed by a motorized cylinder constituting a mechanical assistance means for modifying the relative inclination of the footrest relative to the seat.

De manière préférée, le fauteuil selon l'invention est destiné à permettre un déplacement de l'utilisateur et, à cet effet, il forme un fauteuil roulant dont le châssis comprend au moins trois roues. Afin de donner une autonomie complète à l'utilisateur, l'une au moins des roues sera, de préférence mais non nécessairement, motorisée, auquel cas son fonctionnement sera commandé au moyen de l'unité décommande évoquée ci-dessus.Preferably, the chair according to the invention is intended to allow movement of the user and, for this purpose, it forms a wheelchair whose chassis comprises at least three wheels. In order to give complete autonomy to the user, at least one of the wheels will preferably, but not necessarily, motorized, in which case its operation will be controlled by means of the decontrol unit mentioned above.

Diverses autres caractéristiques ressortent de la description ci-dessous effectuée en référence aux dessins annexés qui illustrent une forme préférée mais non limitative de réalisation d'un fauteuil selon l'invention.

  • La fig. 1 est une perspective de trois-quarts avant du fauteuil selon l'invention dans une position assise basse ou normale de la structure d'assise.
  • La fig. 2 est une élévation de coté du fauteuil, selon la fig. 1 , dans la position assise basse.
  • La fig. 3 est une perspective de trois quarts arrière du fauteuil, selon la fig. 1 , en position de verticalisation de la structure d'assise.
  • La fig. 4 est une élévation de coté du fauteuil, dans la position selon la fig. 3 .
  • La fig. 5 est une perspective de trois-quarts avant du fauteuil, selon la fig. 1 , dans une position allongée inclinée vers l'arrière de la structure d'assise.
  • La fig. 6 est une élévation de coté du fauteuil, dans la position selon la fig. 5 .
  • La fig. 7 est une élévation, analogue à fig. 2 , du fauteuil dans une position assise haute de la structure d'assise.
  • La fig. 8 est une élévation, analogue à fig. 2 , du fauteuil dans une position dite de relaxe de la structure d'assise.
  • La fig. 9 est une élévation, analogue à fig. 2 , du fauteuil dans une position allongée de la structure d'assise.
  • La fig. 10 est une perspective analogue à la fig. 3 montrant une autre forme de réalisation d'un fauteuil selon invention.
Various other characteristics appear from the description below made with reference to the accompanying drawings which illustrate a preferred but non-limiting embodiment of a chair according to the invention.
  • The Fig. 1 is a three-quarter perspective front of the chair according to the invention in a low or normal sitting position of the seat structure.
  • The Fig. 2 is a side elevation of the chair, according to the Fig. 1 , in the low sitting position.
  • The Fig. 3 is a three-quarter perspective back of the chair, according to the Fig. 1 In position verticalization of the seat structure.
  • The Fig. 4 is a side elevation of the chair, in the position according to Fig. 3 .
  • The Fig. 5 is a three-quarter front view of the chair, according to the Fig. 1 in an elongated position inclined towards the rear of the seat structure.
  • The Fig. 6 is a side elevation of the chair, in the position according to Fig. 5 .
  • The Fig. 7 is an elevation, analogous to Fig. 2 , The chair in a high seating position of the seat structure.
  • The Fig. 8 is an elevation, analogous to Fig. 2 , The chair in a release of said position of the seat structure.
  • The Fig. 9 is an elevation, analogous to Fig. 2 , The chair in a reclining position of the seat structure.
  • The Fig. 10 is a perspective analogous to the Fig. 3 showing another embodiment of a chair according to the invention.

Un fauteuil selon l'invention, tel qu'illustré aux fig. 1 à 6 , comprend un châssis porteur 1 sur lequel est adaptée une structure d'assise 2. Selon la forme illustrée, le châssis 1 comprend deux roues avant motrices 3, chacune supportée par un bras de suspension 4. Le châssis 1 comprend, en outre, deux roues arrière 5, dites folles, dans la mesure où elles sont liées au châssis 1 par un pivot 6 d'axe sensiblement vertical.An armchair according to the invention, as illustrated in Fig. 1 to 6 , comprises a support frame 1 on which is adapted a seat structure 2 . According to the illustrated form, the chassis 1 comprises two front-wheel-drive wheels 3 , each supported by a suspension arm 4 . The chassis 1 further comprises two rear wheels 5 , said to be crazy, insofar as they are connected to the chassis 1 by a pivot 6 of substantially vertical axis.

Afin de permettre les modifications de direction du fauteuil lors de son déplacement, chaque roue motrice 3 est équipée d'un moto-réducteur électrique 7 alimenté par un jeu de batteries 8 et piloté par une unité de commande 9 pourvue d'une manette 10. L'unité de commande 9 permet, au moyen de la manette 10, d'assurer une commande synchronisée ou non des roues motrices 4 de manière à faire avancer, reculer, tourner à gauche ou à droite, le fauteuil selon l'invention.In order to allow changes in the direction of the wheelchair during its movement, each drive wheel 3 is equipped with an electric geared motor 7 powered by a set of batteries 8 and controlled by a control unit 9 provided with a handle 10 . The control unit 9 allows, by means of the lever 10 , to ensure synchronized control or not the driving wheels 4 so as to advance, backward, turn left or right, the chair according to the invention.

Bien entendu, il doit être considéré qu'un tel mode de réalisation du châssis porteur 1 n'est pas strictement nécessaire à l'invention et, ainsi, le châssis porteur pourrait ne comprendre aucune roue motorisée et être, par exemple, conçu pour un déplacement manuel.Of course, it should be considered that such an embodiment of the carrier frame 1 is not strictly necessary for the invention and, thus, the carrier frame could include no motorized wheel and be, for example, designed for a manual movement.

De manière classique, la structure d'assise 2 comprend un repose-pied 15, un siège 16 et un dossier 17. De manière préférée mais non strictement nécessaire à réalisation d'un fauteuil selon l'invention, la structure, d'assise 2 est articulée de façon à permettre une modification de l'inclinaison relative du dossier 17 par rapport au siège 16 et/ou une modification de l'inclination relative du repose-pied 15 par rapport au siège 16.Conventionally, the seat structure 2 comprises a footrest 15 , a seat 16 and a backrest 17 . In a manner preferred but not strictly necessary for producing a chair according to the invention, the seat structure 2 is articulated so as to allow a modification of the relative inclination of the backrest 17 with respect to the seat 16 and / or a modifying the relative inclination of the footrest 15 with respect to the seat 16 .

A cet effet et dans la forme de réalisation plus particulièrement illustrée aux figures, la structure d'assise 2 comprend une traverse 19 qui est située dans la région antérieure du fauteuil.For this purpose and in the embodiment more particularly illustrated in the figures, the seat structure 2 comprises a cross member 19 which is located in the front region of the chair.

La structure d'assise comprend également une structure 20 de support du siège 16, qui est composée d'au moins un et, selon l'exemple illustré, de deux longerons 21 qui sont solidaires du siège et qui, selon l'exemple illustré, contribuent à définir un cadre de support de ce dernier. De manière préférée, les longerons 21 sont réalisés en deux parties 211, 212 pour permettre un réglage de la profondeur d'assise en fonction de la taille et de la corpulence de l'utilisateur du fauteuil.The seat structure also comprises a structure 20 for supporting the seat 16 , which is composed of at least one and, according to the illustrated example, of two longitudinal members 21 which are integral with the seat and which, according to the illustrated example, help define a support framework for the latter. Preferably, the longitudinal members 21 are made in two parts 21 1 , 21 2 to allow adjustment of the seat depth according to the size and build of the wheelchair user.

Les parties avant 211 des deux longerons 21 sont articulées à l'avant sur la traverse antérieure 19 par l'intermédiaire de pivots 22 d'axes sensiblement horizontaux. La structure 20 de support articulé du siège 16 comprend, en outre, un vérin télescopique motorisé 23, constitué, par exemple mais non exclusivement, par un vérin électrique à vis. Le vérin télescopique motorisé 23 est alors articulé à l'avant sur la traverse antérieure 19 par un pivot 24 d'axe également horizontal et, à l'arrière, sur les longerons 21 et/ou comme cela est illustré sur un élément tel qu'une traverse 25 liée aux parties avant 211 des deux longerons 21 et constitutive de la structure articulée 20 de support du siège 16. Le vérin télescopique motorisé 23 est alors fixé à la traverse 25 par l'intermédiaire d'un pivot 26 d'axe horizontal.The front portions 21 1 of the two longitudinal members 21 are articulated at the front on the anterior cross member 19 via pivots 22 of substantially horizontal axes. The articulated support structure 20 of the seat 16 further comprises a motorized telescopic ram 23 , constituted, for example but not exclusively, by an electric screw jack. The motorized telescopic ram 23 is then articulated at the front on the anterior cross member 19 by a pivot 24 of axis also horizontal and, at the rear, on the longitudinal members 21 and / or as illustrated on an element such as a cross member 25 connected to the front portions 21 1 of the two side members 21 and constituting the articulated structure 20 for supporting the seat 16. The telescopic jack motorized 23 is then attached to the cross member 25 via a pivot 26 of horizontal axis.

La structure d'assise 2 comprend, également, une structure articulée 30 de support du dossier 17. La structure de support de dossier 30 comprend au moins un et, selon l'exemple illustré, deux montants 31 qui sont solidaires du dossier 17 et qui sont articulés sur les parties arrières 212 des longerons 21. The seat structure 2 also comprises an articulated structure 30 for supporting the backrest 17. The backrest support structure 30 comprises at least one and, according to the illustrated example, two uprights 31 which are secured to the backrest 17 and which are articulated on the rear parts 21 2 of the longitudinal members 21.

Selon l'exemple illustré, les montants 31 sont plus particulièrement reliés par une traverse 32 qui se trouve alors elle-même articulée sur les longerons 21 de la structure de support de siège 20, par l'intermédiaire de pivots 33 d'axes horizontaux.According to the illustrated example, the uprights 31 are more particularly connected by a cross member 32 which is then itself hinged to the longitudinal members 21 of the seat support structure 20, via pivots 33 of horizontal axes.

La structure articulée 30 de support du dossier 17 comprend, en outre, un bras de dossiers 35 placé sous le siège 16, comme cela ressort plus particulièrement de la fig. 4 . Ce bras de dossiers 35 est, de préférence mais non nécessairement, réalisé en deux parties, respectivement antérieure 36 et postérieure 37, qui permettent un réglage permanent de la longueur du bras de dossier 35, en fonction notamment de la profondeur d'assise. La partie antérieure 36 du bras de dossier est articulée sur la traverse antérieure 19, par l'intermédiaire d'un pivot d'axe horizontal 39, tandis que la partie postérieure 37 est, articulée par un pivot 40, d'axe également sensiblement horizontal, sur les montants 31 ou un élément solidaire de ces derniers, en l'espèce un doigt 321 faisant partie intégrante de la traverse 32. The articulated support structure 30 of the backrest 17 further comprises a backrest arm 35 placed under the seat 16, as is more particularly apparent from the Fig. 4 . This backrest arm 35 is preferably, but not necessarily, made in two parts, respectively anterior 36 and posterior 37, which allow permanent adjustment of the length of the backrest arm 35, in particular as a function of the seat depth. The anterior portion 36 of the backrest arm is hinged to the anterior cross member 19, via a pivot of horizontal axis 39, while the rear portion 37 is articulated by a pivot 40, also of substantially horizontal axis , on the uprights 31 or an integral element thereof, in this case a finger 32 1 forming an integral part of the crossbar 32.

Selon une forme préférée mais non strictement nécessaire de réalisation, la longueur du bras de dossiers 35 est réglable de manière à pouvoir ajuster l'inclinaison relative du dossier 17 par rapport au siège 16. A cet effet et selon l'exemple illustré, la partie antérieure 36 du bras 35 est formée par un vérin motorisé télescopique, tel que, par exemple, un vérin électrique à vis dont le fonctionnement est piloté par l'unité de commande 9. According to a preferred but not strictly necessary embodiment, the length of the backrest arm 35 is adjustable so as to adjust the relative inclination of the backrest 17 relative to the seat 16. For this purpose and according to the illustrated example, the part front 36 of the arm 35 is formed by a telescopic motorized jack, such as, for example, an electric screw jack whose operation is controlled by the control unit 9.

Afin de permettre une modification continue et automatique de la longueur du segment dorsal, à savoir de la distance entre le siège 16 et le dossier 17, lors de la modification de leur inclinaison relative, le dossier 17 est, de manière préférée, adapté sur chaque montant 31 par l'intermédiaire d'un coulisseau 42 qui est, en outre, relié à la structure de support de siège 20 par une biellette 43. In order to allow a continuous and automatic modification of the length of the back segment, namely the distance between the seat 16 and the backrest 17 , during the modification of their relative inclination, the backrest 17 is, preferably, fitted to each upright 31 by means of a slider 42 which is further connected to the seat support structure 20 by means of a link 43.

La structure d'assise 2 comprend, également, une structure articulée 50 de support du repose-pied 15. La structure 50 comprend alors au moins un et, selon l'exemple illustré, exactement un segment jambier 51 qui est lié au repose-pied 15 et qui est articulé sur la traverse antérieure 19 par l'intermédiaire d'un pivot 52 d'axe horizontal.The seat structure 2 also comprises an articulated structure 50 for supporting the footrest 15. The structure 50 then comprises at least one and, according to the illustrated example, exactly one leg segment 51 which is connected to the footrest 15 and which is articulated on the anterior cross member 19 by means of a pivot 52 of horizontal axis.

La structure articulée de support de repose-pied 50 comprend, également, au moins et, selon l'exemple illustré, exactement un bras de jambier 53 qui est articulé, d'une part, sur la, traverse antérieure par un pivot 54 d'axe horizontal et, d'autre part, sur le segment jambier 51 également par l'intermédiaire d'un pivot 55 d'axe aussi horizontal.The articulated footrest support structure 50 also comprises at least and, according to the illustrated example, exactly one leg arm 53 which is articulated, on the one hand, on the anterior cross member by a pivot 54 of horizontal axis and, on the other hand, on the tibial segment 51 also via a pivot 55 of axis also horizontal.

De manière préférée, le bras de jambier 53 présente une longueur réglable, afin de permettre une modification ou un ajustement de l'inclinaison relative ou inclinaison du segment jambier 51 par rapport au siège 16 et donc, de ce fait, une modification de la position angulaire relative du repose-pied 15 par rapport au siège 16. Preferably, the leg arm 53 has an adjustable length, to allow a modification or adjustment of the relative inclination or inclination of the leg segment 51 with respect to the seat 16 and therefore, a modification of the position relative angle of the footrest 15 with respect to the seat 16.

Selon l'exemple illustré, à cet effet et de manière préférée, le bras de jambier 53 est constitué par un vérin télescopique motorisé, tel qu'un vérin électrique à vis, commandé par l'unité 9, comme cela apparaîtra plus particulièrement par la suite.According to the illustrated example, for this purpose and preferably, the leg arm 53 is constituted by a motorized telescopic jack, such as an electric screw jack, controlled by the unit 9, as will appear more particularly by the after.

Afin de permettre une modification automatique de la distance entre lé repose-pied 15 et le siège 16, comme cela peut être nécessaire lors de la modification de la position angulaire relative de ces deux éléments, le repose-pied 15 est, selon l'exemple illustré et de manière préférée, adapté sur le segment jambier 51 par l'intermédiaire d'un chariot 56.In order to allow an automatic modification of the distance between the footrest 15 and the seat 16, as may be necessary when changing the relative angular position of these two elements, the footrest 15 is, according to the example illustrated and preferably, adapted on the tibial segment 51 via a carriage 56 .

Selon l'exemple illustré, ce chariot 56 est alors relié, par des moyens de liaison 57, au siège 16 ou à la structure de support de siège 20, de manière à permettre une modification automatique de la distance entre le siège 16 et le repose-pied 15, lors de la modification de l'inclinaison relative du segment jambier 51 par rapport au siège 16.According to the illustrated example, this carriage 56 is then connected, by connecting means 57 , to the seat 16 or the seat support structure 20 , so as to allow an automatic modification of the distance between the seat 16 and the footrest 15 , during the modification of the relative inclination of the tibial segment 51 with respect to the seat 16 .

Conformément à une caractéristique de l'invention, le fauteuil comprend, en outre, des moyens élévateurs 60, interposés entre le châssis 1 et la structure d'assise 2 pour permettre une modification de la hauteur de la structure d'assise.According to a feature of the invention, the chair further comprises elevator means 60 , interposed between the frame 1 and the seat structure 2 to allow a change in the height of the seat structure.

Les moyens élévateurs pourraient être réalisés de différentes façons et, par exemple, constitués par un simple vérin, interposé entre le châssis 1 et la structure d'assise 2 et, par exemple, entre le châssis et la traverse antérieure 2. Toutefois, selon une forme préférée de réalisation de l'invention et afin de présenter une plus grande stabilité et rigidité, les moyens élévateurs 60 comprennent au moins un ensemble articulé qui est constitué d'au moins un ét, selon l'exemple illustré, de deux polygones 61 déformables dans deux plans verticaux parallèles.The lifting means could be made in different ways and, for example, constituted by a single jack, interposed between the frame 1 and the seat structure 2 and, for example, between the frame and the front cross member 2. However, according to a preferred embodiment of the invention and in order to have greater stability and rigidity, the elevator means 60 comprise at least one articulated assembly which consists of at least one, according to the illustrated example, two deformable polygons 61 in two parallel vertical planes.

Selon l'exemple illustré, chaque polygone déformable 61 présente la forme d'un parallélogramme déformable dont deux grands côtés sont formés par deux segments ou bras inférieur 62i et supérieur 62s qui sont articulés vers l'avant sur la traverse antérieure 19 par des pivots 63i ,63s d'axes sensiblement horizontaux. La traverse antérieure 19 forme alors un petit côté des parallélogrammes déformables 61. Il doit être noté que, selon l'exemple illustré, l'axe des pivots 63s des bras supérieurs 62s est confondu avec l'axe des pivots 22 de la structure articulée de support de siège 20. Les segments ou bras 62i , 62 s sont, par ailleurs, articulés au niveau de leur extrémité postérieure sur une embase 65, solidaire du châssis et articulée sur ce dernier au moyen d'un pivot d'axe sensiblement horizontal 66.According to the illustrated example, each deformable polygon 61 has the shape of a deformable parallelogram whose two long sides are formed by two segments or lower arm 62 i and upper 62 s which are hinged forward on the anterior cross member 19 by pivots 63 i , 63 s of substantially horizontal axes. The anterior cross member 19 then forms a small side of the deformable parallelograms 61 . It should be noted that, in the example shown, the axis of the pivots 63 s 62 s of the upper arms is coincident with the axis of the pivots 22 of the articulated structure 20 seat support. The segments or arms 62 i , 62 s are, moreover, hinged at their posterior end on a base 65 , integral with the chassis and hinged to the latter by means of a pivot of substantially horizontal axis 66 .

Selon l'exemple illustré, l'embase 65 comprend deux palonniers 67 qui forment chacun le petit côté d'un parallélogramme déformable 61, en étant reliés aux segments 62i , 62s correspondants par des pivots 68i , 68s d'axe sensiblement horizontal. Il sera remarqué que, selon l'exemple illustré, les pivots d'articulation 68i , des segments inférieurs 62i avec le palonnier correspondant 67, ont un axe confondu avec l'axe d'oscillation de l'embase. 65 sur le châssis 62.According to the illustrated example, the base 65 comprises two spreaders 67 which each form the short side of a deformable parallelogram 61 , being connected to the corresponding segments 62 i , 62 s by pivots 68 i , 68 s of axis substantially horizontal. It will be noticed that, according to the illustrated example, the articulation pivots 68 i , lower segments 62 i with the rudder corresponding 67 , have an axis coincident with the axis of oscillation of the base. 65 on the chassis 62 .

Les moyens d'élévation comprennent, en outre, un moyen d'assistance mécanique 70, interposé entre l'embase 65 et le segment supérieur 62s gauche pour permettre, par une déformation des polygones ou parallélogrammes déformables 61, une modification de la hauteur d'assise. Bien entendu selon l'invention les moyens d'assistance mécanique 70 pourraient êtres interposés entre l'embase et un autre segment des parallélogrammes déformable 61.The elevation means further comprise a mechanical assistance means 70 interposed between the base 65 and the upper segment 62 s left to allow, by a deformation of the deformable polygons or parallelograms 61 , a modification of the height of the 'seated. Of course, according to the invention, the mechanical assistance means 70 could be interposed between the base and another segment of the deformable parallelograms 61 .

De manière préférée, les moyens d'assistance mécanique 70 sont constitués par un vérin télescopique motorisé, tel qu'un vérin électrique à vis, commandé par l'unité 9.Preferably, the mechanical assistance means 70 are constituted by a motorized telescopic jack, such as an electric screw jack, controlled by the unit 9 .

Enfin, le fauteuil 2 comprend un moyen d'assistance mécanique, tel que, par exemple, un vérin électrique à vis motorisé 73, interposé entre le châssis 2 et l'embase 65, de manière à en modifier l'angle relatif. Ainsi, l'embase 65 et le vérin 73 définissent ensemble des moyens d'inclinaison de l'ensemble de la structure d'assise, comme cela apparaîtra par la suite.Finally, the chair 2 comprises a mechanical assistance means, such as, for example, an electric motor screw jack 73 , interposed between the frame 2 and the base 65 , so as to modify the relative angle. Thus, the base 65 and the cylinder 73 together define tilting means of the entire seating structure, as will appear later.

Le fauteuil, tel que décrit précédemment, fonctionne de la manière suivante.The chair, as described above, operates in the following manner.

Tout d'abord, il doit être rappelé que l'ensemble des organes d'assistance mécanique, constitués par :

  • ■ le vérin télescopique motorisé 70 des moyens d'élévation,
  • ■ le vérin télescopique motorisé 23 de la structure articulée 20 de support du siège 16,
  • ■ le vérin télescopique motorisé 36 de la structure articulée 30 de support du dossier 17,
  • ■ le vérin télescopique motorisé 53 de la structure articulée 50 de support du repose-pied 15,
  • ■ et le vérin télescopique motorisé 73 des moyens d'inclinaison de l'ensemble de la structure d'assise 2,
sont tous pilotés par l'unité de commande 9.First of all, it must be remembered that all mechanical assistance bodies, consisting of:
  • The motorized telescopic ram 70 of the elevation means,
  • ■ the motorized telescopic cylinder 23 of the articulated structure 20 supporting the seat 16,
  • The motorized telescopic ram 36 of the articulated structure 30 for supporting the backrest 17 ,
  • The motorized telescopic ram 53 of the articulated support structure 50 of the footrest 15 ,
  • ■ and the motorized telescopic ram 73 means for tilting the whole of the seat structure 2 ,
are all controlled by the control unit 9 .

De manière préférée, l'unité de commande 9 est alors conçue de manière à permettre une commande individuelle de chacun de ces vérins. Ainsi, l'utilisateur du fauteuil selon l'invention peut commander un mouvement d'élévation/abaissement de l'ensemble de la structure d'assise par un pilotage du vérin télescopique motorisé 70, dit de « lift » qui assure une modification de la hauteur du siège 16. Il est donc possible à l'utilisateur du fauteuil de commander un passage de la position assise basse ou normale telle qu'illustrée à la fig. 1 à la position assise haute telle qu'illustrée à la fig. 7 Preferably, the control unit 9 is then designed to allow individual control of each of these cylinders. Thus, the user of the chair according to the invention can control a raising / lowering movement of the entire seating structure by a control of the motorized telescopic ram 70 , called "lift" which ensures a modification of the seat height 16 . It is therefore possible for the wheelchair user to control a passage from the low or normal sitting position as illustrated in FIG. Fig. 1 at the high sitting position as illustrated in Fig. 7

De même, alors, indépendamment de la hauteur de la structure d'assise ou du siège 16, l'utilisateur peut également, par l'intermédiaire de l'unité 9, assurer un pilotage du vérin télescopique motorisé 73, dit d'assiette, et modifier l'inclinaison générale ou assiette de la structure d'assise pour, par exemple, l'incliner vers l'arrière et se placer dans une position de relaxe comme illustrée à la fig. 8 . Similarly, then, regardless of the height of the seat structure or the seat 16 , the user can also, through the unit 9 , provide a control of the motorized telescopic ram 73 , called plate, and altering the overall inclination or attitude of the seating structure to, for example, tilt it backwards and move into a relaxed position as illustrated in FIG. Fig. 8 .

Il doit être noté que ce mouvement de modification de l'assiette n'influe aucunement la configuration générale de la structure d'assise.It should be noted that this attitude change movement does not affect the overall configuration of the seating structure.

L'utilisateur peut, également, par le pilotage, au moyen de l'unité de commande 9, des vérins 36 et 53 modifier l'inclinaison relative du dossier par rapport au siège, ainsi que l'inclinaison du repose-pied par rapport au siège, de sorte qu'il peut placer le fauteuil selon l'invention dans différentes configurations telles que de semi allongée ou, encore, complètement allongée, comme représentée à la fig. 9 , configuration dans laquelle le dossier 17, le siège 16 et le repose-pied 15 se trouvent alors sensiblement alignés dans un plan horizontal.The user can also, by controlling, by means of the control unit 9 , the cylinders 36 and 53 modify the relative inclination of the backrest relative to the seat, as well as the inclination of the footrest relative to the seat, so that it can place the chair according to the invention in different configurations such as semi elongated or, still, completely elongated, as shown in FIG. Fig. 9 configuration in which the backrest 17 , the seat 16 and the footrest 15 are then substantially aligned in a horizontal plane.

Dans une forme préférée de réalisation, l'unité de commande 9 est adaptée pour permettre un passage automatique en position allongée par un pilotage coordonné des vérins de dossier 36 et de repose-pied 53.In a preferred embodiment, the control unit 9 is adapted to allow automatic passage in the extended position by a coordinated control of the backrest cylinders 36 and footrest 53 .

Dans cette configuration allongée, l'utilisateur a encore accès à la fonction d'élévation/abaissement et peut, par exemple, par une commande du vérin de lift 70 choisir de placer la structure d'assise en configuration couchette à la hauteur souhaitée pour permettre, le transfert de l'utilisateur du fauteuil sur une table d'examen ou encore dans un lit.In this elongated configuration, the user still has access to the raising / lowering function and can, for example, by a control of the lift jack 70 choose to place the seat structure in configuration berth at the desired height to allow the transfer of the user of the chair on an examination table or in a bed.

De plus, dans cette configuration, l'utilisateur a également accès à la fonction d'inclinaison générale de l'ensemble de la structure d'assise et peut, par exemple, l'incliner vers l'arrière, alors même qu'elle se trouve en position couchette. Cette position couchée inclinée vers l'arrière, dite « proclive », illustrée fig. 5 et 6 , peut être utile pour la technique de kinésithérapie respiratoire dite de « claping ».Moreover, in this configuration, the user also has access to the general inclination function of the entire seating structure and can, for example, tilt it backwards, even though is in the sleeping position. This reclining recumbent position, called "proclive", illustrated Fig. 5 and 6 , may be useful for the technique of respiratory physiotherapy called "claping".

Selon l'invention, le fauteuil peut, à partir de la position normale assise fig. 1 , par la seule commande du vérin motorisé 23, passer en position de verticalisation 4. En effet, compte tenu de la relation existant entre les structures articulées de support du siège 16, du dossier 17 et du repose-pied 15, la seule commande du vérin télescopique motorisé 23 permet de passer de la position assise à la position de verticalisation, telle qu'illustrée aux fig. 3 et 4 . According to the invention, the chair can, from the normal sitting position Fig. 1 by the sole control of the motorized jack 23 , move to the vertical position 4 . Indeed, given the relationship between the articulated support structures of the seat 16 , the backrest 17 and the footrest 15 , the only control of the motorized telescopic ram 23 allows to move from the sitting position to the vertical position, as illustrated in Fig. 3 and 4 .

La manoeuvre d'un seul vérin, dit de verticalisation, 23 pour assurer cette verticalisation de la structure d'assise présente l'avantage d'offrir un très grand confort et un sentiment de sécurité, dans la mesure où ce mouvement peut être assuré de manière automatique par l'unité de commande, sans à-coups et avec une grande fluidité.The maneuvering of a single jack, said verticalization, 23 to ensure this verticalization of the seat structure has the advantage of offering a very great comfort and a sense of security, insofar as this movement can be assured of Automatically by the control unit, smoothly and with great fluidity.

Bien entendu, l'unité de commande 9 sera alors programmée de manière à s'assurer que la structure d'assise 2 est, avant le déclenchement du mouvement de verticalisation, située à une hauteur suffisante pour empêcher tout risque de blocage du mouvement par un contact du repose-pied avec le sol.Of course, the control unit 9 will then be programmed to ensure that the seat structure 2 is, before the initiation of the vertical movement, located at a height sufficient to prevent any risk of blocking the movement by a contact of the footrest with the ground.

Par ailleurs, il est à noter qu'en position de verticalisation, la fonction d'élévation, assurée par le vérin dé lift 70, reste accessible. De même la fonction d'inclinaison générale de l'ensemble de la structure d'assise est, en position de verticalisation, également accessible par la commande du vérin d'assiette 73, de sorte qu'il est possible de choisir une position légèrement inclinée vers l'arrière contribuant à donner une meilleure stabilité au fauteuil et à apporter un sentiment de sécurité à l'utilisateur du fauteuil qui n'a plus l'usage de ses membres inférieurs.Furthermore, it should be noted that in the vertical position, the elevation function, provided by the lift cylinder 70 , remains accessible. Similarly, the general inclination function of the entire seat structure is, in the position of verticalization, also accessible by the control of the attitude cylinder 73 , so that it is possible to choose a slightly inclined position backwards helping to give the chair better stability and to bring a sense of security to the wheelchair user who no longer has the use of his lower limbs.

Afin, d'offrir une très grande souplesse et facilité d'utilisation, l'unité de commande 9 est de plus adaptée pour assurer par un fonctionnement coordonné des vérins de verticalisation 23, de dossier 36 et de jambier 53, un passage automatique de la position de verticalisation fig. 4 à la position allongée fig. 9 et inversement avec, éventuellement, une possibilité d'arrêt dans une position intermédiaire. Ce mouvement est alors réalisé en conservant l'alignement du repose pied, du siège et du dossier sensiblement ' dans un même plan.In order to offer a very great flexibility and ease of use, the control unit 9 is moreover adapted to ensure by a coordinated operation of the verticalizing cylinders 23 , 36 and tilting 53 , an automatic passage of the standing position Fig. 4 in the lying position Fig. 9 and conversely with, optionally, a possibility of stopping in an intermediate position. This movement is then achieved by maintaining the alignment of the footrest, seat and back substantially 'in the same plane.

Il est à noter que, afin de garantir la sécurité d'utilisation en position de verticalisation, le fauteuil sera équipé de moyens de retenue thoracique, non représentés et constitués, par exemple, par une ceinture ou harnais, ainsi que de moyens de retenue bas 80 formés, selon l'exemple illustré, par des genouillères venant appliquer une pression sur les genoux, afin d'empêcher tout affaissement de l'utilisateur du fauteuil en position de verticalisation.It should be noted that, in order to guarantee the safety of use in a vertical position, the chair will be equipped with chest restraint means, not shown and constituted, for example, by a belt or harness, as well as low retaining means. 80 formed, according to the example shown, knee pads coming to apply pressure on the knees, to prevent sagging of the user of the chair in the vertical position.

De même, de manière habituelle pour un fauteuil pour handicapés, le fauteuil selon l'invention comprend deux accoudoirs 81 solidaires de la structure de dossier 20. Selon l'exemple illustré, l'unité de commande 9 est adaptée sur l'accoudoir 81 de droite.Similarly, as is customary for a chair for the disabled, the chair according to the invention comprises two armrests 81 integral with the backrest structure 20 . According to the illustrated example, the control unit 9 is fitted on the armrest 81 on the right.

Selon l'exemple illustré et décrit précédemment, le dossier 17 est relié à la structure de support de siège 20 par une biellette 43. Toutefois un tel mode de liaison rigide n'est pas strictement nécessaire à la réalisation d'un fauteuil selon l'invention.According to the example illustrated and described above, the backrest 17 is connected to the seat support structure 20 by a link 43 . However, such a rigid connection mode is not strictly necessary for the production of a chair according to the invention.

Ainsi, la fig. 10 présente une autre forme de réalisation d'un fauteuil multiposition pour handicapés selon l'invention qui diffère de la forme de réalisation telle que décrite en relation avec les fig. 1 à 9 en ce que le dossier 17 est supporté par un seul montant 90 articulé sur la structure 20 de support du siège 16. Le dossier 17 est alors lié à un coulisseau qui est mobile dans le montant 91. Le dossier est en outre relié à la structure de support de siège par une courroie souple, non représentée, guidée par un système de poulies, également non représentées, de manière à assurer une augmentation de la distance entre le dossier 17 et le siège 16 lors du passage en position de verticalisation.So, the Fig. 10 presents another embodiment of a multiposition chair for the disabled according to the invention which differs from the embodiment as described in connection with the Fig. 1 to 9 in that the backrest 17 is supported by a single upright 90 articulated on the support structure 20 of the seat 16 . The file 17 is then linked to a slider which is movable in the upright 91 . The backrest is further connected to the seat support structure by a flexible belt, not shown, guided by a pulley system, also not shown, so as to ensure an increase in the distance between the backrest 17 and the seat 16 during the transition to the vertical position.

La forme de réalisation illustrée à la fig. 10 se différencie également en ce que se sont les roues arrière 3 qui sont motrices tandis que les roues avant 5 sont folles. Le fauteuil motorisé illustré à la fig. 10 peut donc être qualifié de fauteuil à propulsion par opposition au fauteuil illustré aux fig. 1 à 9 qui peut être qualifié de fauteuil à traction. Dans le cadre de la forme de réalisation illustrée à la fig. 10 , le placement des moteurs 7 à l'arrière permet de reculer les masses et donc d'augmenter la stabilité du fauteuil en position de verticalisation notamment.The embodiment illustrated in Fig. 10 is also different in that the rear wheels 3 are driving while the front wheels 5 are crazy. The motorized wheelchair shown in Fig. 10 can be described as a powered wheelchair as opposed to an armchair Fig. 1 to 9 which can be described as a traction chair. In the context of the embodiment illustrated in Fig. 10 the placement of motors 7 at the rear allows to roll back the masses and thus to increase the stability of the chair in particular vertical position.

Claims (13)

  1. A wheelchair for handicapped people or people of reduced mobility, with:
    • a support chassis (1),
    • a seat structure (2) that includes at least:
    ◆ a footrest (15),
    ◆ a seat (16),
    ◆ a seat back (17),
    ◆ support structures for the seat back (17), the seat (16) and the footrest (15), that are articulated in order to allow a change in the relative slope of the seat back in relation to the seat and/or a change in the relative slope of the footrest in relation to the seat,
    ◆ and at least one mechanical assistance means (23, 36, 53) designed to ensure a change in the relative inclination of the seat back in relation to the seat and/or a change in the relative slope of the footrest in relation to the seat
    • lifting means (60) interposed between the chassis (1) and the seat structure (2), allowing a change in the height of the seat structure, and including at least one articulated assembly with at least one polygon that is deformable (61) in a vertical plane, interposed between the seat structure and the base, which then forms one side of the deformable polygon, and a mechanical assistance means (70) designed, by deformation of the polygon (61), to allow a change in the height of the seat structure (2)
    • means to incline the whole seat structure (2), inclining means that are interposed between the chassis and the lifting means and that include at least:
    • a base (65) that is attached to the chassis (1) and that oscillates around a more-or-less horizontal axis on which the lifting means are fitted,
    • and a mechanical assistance means (73) that is interposed between the base (65) and the chassis (1) and that is designed, by rotation of the base (65), to allow a change in the slope of the whole seat structure (2), independently of its configuration and in particular of the seat height,
    and the wheelchair being characterised in that:
    • the seat structure (2) includes a cross-member (19) that is located in the rear region of the wheelchair and that forms one side of the deformable polygon (61) of the lifting means (60),
    • the articulated structure (20) to support the seat includes at least:
    - a stringer (21) that is attached to the seat (16) and that is articulated toward the front on the rear cross-member (19),
    - and a motor-driven telescopic actuator (23) that is articulated toward the front on the rear cross-member (19) and, to the rear on the stringer or an element (25) attached to the stringer, and that forms a mechanical assistance means for verticalisation of the seat structure (2),
    • the articulated structure (30) that supports the seat back (17) includes at least:
    - an upright (31) that is attached to the seat back and that is articulated on the rear end of the stringer (21) or on an element attached to the stringer,
    - and a seat back arm (35) that is articulated on the rear cross-member (19) and on the upright (31) or an element (32) attached to the upright,
    • and the articulated structure (50) to support the footrest (15) includes at least:
    - a leg-support segment (51) that is attached to the footrest and that is articulated on the rear cross-member (19),
    - a leg-support arm (53) that is articulated firstly on the rear cross-member (19) and secondly on the leg-support segment (51).
  2. A wheelchair according to claim 1, characterised in that the articulated assembly (60) includes at least two polygons (61) that are deformable in two parallel vertical planes.
  3. A wheelchair according to claims 1 or 2, characterised in that each deformable polygon (61) takes the form of a quadrilateral that is deformable, in which two sides are formed by two articulated segments connecting the chassis to the seat structure.
  4. A wheelchair according to claim 3, characterised in that the deformable quadrilateral (61) takes the form of a parallelogram.
  5. A wheelchair according to one of claims 1 to 4, characterised in that the mechanical assistance means (73) of the means to incline the whole seat structure (2) is motor-driven.
  6. A wheelchair according to one of claims 1 to 5, characterised in that the articulated seat structure (2) and the mechanical assistance means (23) are designed so as to allow the passage of the seat structure into a verticalisation position in which the footrest (15), the seat (16) and the seat back (17) are placed in extension in relation to each other in a more-or-less vertical plane.
  7. A wheelchair according to one of claims 1 to 6, characterised in that the seat back arm (35) includes a rear segment (36) formed by a motor-driven actuator (36) that constitutes a mechanical assistance means for modifying the relative slope of the seat back (17) in relation to the seat (16).
  8. A wheelchair according to one of claims 1 to 7, characterised in that the leg-support arm is formed by a motor-driven actuator (53) that constitutes a mechanical assistance means for modifying the relative slope of the footrest (15) in relation to the seat (16).
  9. A wheelchair according to one of claims 1 to 8, characterised in that it includes a control unit (9) that provides control over the motor-driven actuators and that is designed:
    • firstly, to automatically move the seat structure (2) from a so-called normal position
    ◆ either to a "verticalised" position in which the footrest (15), the seat (16) and the seat back (17) are aligned in a more-or-less vertical plane,
    ◆ or to an extended position, in which the footrest, the seat and the seat back are aligned in a more-or-less horizontal plane,
    • and, secondly, to allow a change in the elevation of the seat structure in a semi-automatic manner.
  10. A wheelchair according to one of claims 1 to 9, characterised in that the footrest (15) is fitted onto the leg-support segment by means of a carrier (56), so as to be mobile in translation in relation to the rear cross-member (19).
  11. A wheelchair according to one of claims 1 to 10, characterised in that the seat back (17) is fitted onto the upright of the seat back by means of a slide (42) so as to be mobile in translation in relation to the seat (16).
  12. A wheelchair according to one of claims 1 to 11, characterised in that the chassis (1) is fitted with at least three wheels (3, 5).
  13. A wheelchair according to claim 12, characterised in that at least one wheel (3) is motor-driven.
EP06726299A 2006-04-03 2006-04-03 Multi-position chair for handicapped user Not-in-force EP2004124B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2006/050288 WO2007113395A1 (en) 2006-04-03 2006-04-03 Multi-position chair for handicapped user

Publications (2)

Publication Number Publication Date
EP2004124A1 EP2004124A1 (en) 2008-12-24
EP2004124B1 true EP2004124B1 (en) 2012-05-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06726299A Not-in-force EP2004124B1 (en) 2006-04-03 2006-04-03 Multi-position chair for handicapped user

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Country Link
US (1) US8128120B2 (en)
EP (1) EP2004124B1 (en)
CN (1) CN101460133A (en)
AT (1) ATE555765T1 (en)
WO (1) WO2007113395A1 (en)

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US20090218784A1 (en) 2009-09-03
EP2004124A1 (en) 2008-12-24
CN101460133A (en) 2009-06-17
US8128120B2 (en) 2012-03-06
ATE555765T1 (en) 2012-05-15

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