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
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EP
European Patent Office
Prior art keywords
seat
articulated
means
structure
footrest
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.)
Active
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.)
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Publication date
Application filed by Lifestand "Vivre Debout", Lifestand Vivre Debout filed Critical Lifestand "Vivre Debout"
Priority to PCT/FR2006/050288 priority Critical patent/WO2007113395A1/en
Publication of EP2004124A1 publication Critical patent/EP2004124A1/en
Application granted granted Critical
Publication of EP2004124B1 publication Critical patent/EP2004124B1/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/042Front wheel drive
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/006Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs convertible to stretchers or beds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10Parts, details or accessories
    • A61G5/1056Arrangements for adjusting the seat
    • A61G5/1059Arrangements for adjusting the seat adjusting the height of the seat
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10Parts, details or accessories
    • A61G5/1056Arrangements for adjusting the seat
    • A61G5/1075Arrangements for adjusting the seat tilting the whole seat backwards
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10Parts, details or accessories
    • A61G5/12Rests specially adapted therefor, e.g. for the head or the feet
    • A61G5/128Rests specially adapted therefor, e.g. for the head or the feet for feet
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10Parts, details or accessories
    • A61G5/14Standing-up or sitting-down aids
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2200/00Information related to the kind of patient or his position
    • A61G2200/30Specific positions of the patient
    • A61G2200/36Specific positions of the patient standing
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00General characteristics of devices
    • A61G2203/10General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
    • A61G2203/14Joysticks
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00General characteristics of devices
    • A61G2203/70General characteristics of devices with special adaptations, e.g. for safety or comfort
    • A61G2203/74General characteristics of devices with special adaptations, e.g. for safety or comfort for anti-shear when adjusting furniture
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S180/00Motor vehicles
    • Y10S180/907Motorized wheelchairs

Abstract

According to the invention, the chair is characterized in that it comprises means for inclining the whole seat structure, which inclining means are interposed between the framework and the lifting means and comprise at least: a base (65) which is integral with the framework (1) and which oscillates about a substantially horizontal axis and on which the lifting means are provided, and a mechanical assistance means which is interposed between the base (65) and the framework (1) and which is designed to permit a modification of the inclination of the whole seat structure by means of a rotation of the base (65).

Description

  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • Other mechanisms, such as those described in US 4,312,500 and US 2003/0227161 do not have a function of raising, lowering.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • Similarly, it is possible to place the articulated seat structure in a relaxed position.
  • 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".
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 .
  • 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 .
  • 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.
  • 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.
  • 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 .
  • 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 .
  • 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 .
  • Preferably, the mechanical assistance means 70 are constituted by a motorized telescopic jack, such as an electric screw jack, controlled by the unit 9 .
  • 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.
  • The chair, as described above, operates in the following manner.
  • 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 .
  • 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
  • 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 .
  • It should be noted that this attitude change movement does not affect the overall configuration of the seating structure.
  • 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.
  • 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 .
  • 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.
  • 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".
  • 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 .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 Active EP2004124B1 (en)

Priority Applications (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

Family

ID=37635836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06726299A Active EP2004124B1 (en) 2006-04-03 2006-04-03 Multi-position chair for handicapped user

Country Status (5)

Country Link
US (1) US8128120B2 (en)
EP (1) EP2004124B1 (en)
CN (1) CN101460133A (en)
AT (1) AT555765T (en)
WO (1) WO2007113395A1 (en)

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Also Published As

Publication number Publication date
EP2004124A1 (en) 2008-12-24
WO2007113395A1 (en) 2007-10-11
AT555765T (en) 2012-05-15
CN101460133A (en) 2009-06-17
US8128120B2 (en) 2012-03-06
US20090218784A1 (en) 2009-09-03

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