EP2889023A1 - Vorrichtung zur Handhabung eines manuell bedienbaren Rollstuhlrads für Behinderte - Google Patents

Vorrichtung zur Handhabung eines manuell bedienbaren Rollstuhlrads für Behinderte Download PDF

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Publication number
EP2889023A1
EP2889023A1 EP14199327.9A EP14199327A EP2889023A1 EP 2889023 A1 EP2889023 A1 EP 2889023A1 EP 14199327 A EP14199327 A EP 14199327A EP 2889023 A1 EP2889023 A1 EP 2889023A1
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EP
European Patent Office
Prior art keywords
support
rotation
handrail
lever
wheel
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.)
Granted
Application number
EP14199327.9A
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English (en)
French (fr)
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EP2889023B1 (de
Inventor
Roland Pelisson
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Publication of EP2889023A1 publication Critical patent/EP2889023A1/de
Application granted granted Critical
Publication of EP2889023B1 publication Critical patent/EP2889023B1/de
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    • 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
    • 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
    • A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
    • A61G5/021—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular propulsion mechanisms
    • A61G5/022—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular propulsion mechanisms acting on wheels, e.g. on tires or hand rims
    • 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
    • A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
    • A61G5/024—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular operating means
    • A61G5/025—Levers
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1013—Wheelchairs having brakes engaging the wheel
    • 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
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1035—Wheelchairs having brakes manipulated by wheelchair user
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1054—Large wheels, e.g. higher than the seat portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/047—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven by a modular detachable drive system

Definitions

  • the present invention relates to the field of personal transport chairs specially adapted for disabled persons, and more particularly to the field of wheelchairs propelled by the disabled person, also called manual wheelchairs.
  • the invention thus proposes a manual wheelchair wheel-handling device for a handicapped person, a manual wheelchair wheel and a manual wheelchair comprising such a device, as well as a method of operability of this handling device.
  • the wheelchairs without electric assistance to the displacement, said manual chairs call, for their setting in movement, the action of the arms of the handicapped person on a hoop fixed outside of wheel (one for each wheel ), this being commonly called "handrail".
  • the handrail is typically in the form of a tube of circular or flattened section, and allows both a good grip by the hand of the user and the transformation of the movements of the arm into a rotation of the wheel. This rotation of the wheel can thus allow the disabled person to move forward, back or rotate his chair.
  • the pinching of the handrail by the user, without moving his arms, can help ensure the braking of the chair in motion.
  • one of the many disadvantages is the very position of the handrail, which is very close to the wheel hub, the handrail necessarily having a smaller diameter than the wheel (ie to say the tire of the wheel) so as not to touch the ground.
  • the propulsion torque transmitted to the arm is thus directly linked to this difference between the tire diameter of the wheel and the diameter of the handrail, respectively most often in a ratio of 60 cm for 50 cm.
  • the slightest difference in altitude or any soil with asperities quickly bring the user to its physical limits, that is to say either to no longer be able to advance, or at least to be tired and feel muscle pain. There is therefore a high risk of later developing joint problems and, as his age progresses, the user is increasingly restricted in his movements.
  • the handrail generally involves a direct contact between the hand of the user and the tube of the handrail. This usually results in a sensation of cold, for example in winter, or a feeling of overheating, for example during a continuous braking on a long slope, uncomfortable and potentially painful for the disabled person, even if that it can slightly attenuate them with the use of protective gloves, for example.
  • this direct contact between the handrail and the hand of the user can be embarrassing from a hygienic point of view, for example because of the presence of dirt or microbes on the handrail.
  • the disabled person may not have enough physical strength in the hand to achieve this, especially as his physical abilities decrease with age and disability.
  • the international application WO 2008/047088 A2 discloses a wheelchair lever system, marketed under the name “NuDrive”, which is based on a reduction of the propulsive force using the length ratio between the lever and the handrail. While this lever system “NuDrive” proposes a fixing of the lever holder on the handrail, another system marketed under the name “Wijit” provides a fixing of the lever holder directly on the hub of the wheel.
  • JP 2012-223551 A which describes a lever system attached to the axis of the wheel and articulated below the handrail
  • the patent application US 2002/0043781 A1 which describes a fairly similar lever system supporting a pad on the handrail at each tilting of the assembly formed by the handle, the handle and the pad
  • the patent US 3,877,725 A which uses a similar principle but with a more complex editing
  • the patent application US 2005/0275190 A1 which also discloses this principle but with a zipper binding around the handrail.
  • the patent application EP 0 728 095 A1 discloses the principle of a roller pressing on the tire of the wheel when the upper part of the lever is pushed, the latter not being articulated. This roller is made to rotate and self-tighten on the tire with each push.
  • the prior patent US 3,869,146 A it is very similar and also describes the presence of a side skate for slow braking or maneuvering.
  • the patent application EP 1966 036 A2 it only boils down to this lateral braking to generate the displacement.
  • the invention thus aims to at least partially remedy the needs mentioned above and the disadvantages relating to the achievements of the prior art.
  • the zone of attachment of the support support on the lever support is chosen on said first part of the lever support so that, when the device is in place on the wheel, a force exerted on the part gripping device for causing rotation of the lever support in its first direction of rotation causes a contact between the distal end of the support support and the handrail, which blocks the rotation of the lever support in the first direction of rotation by arc -boutement and place the device in its engaged position, thus causing a propulsion of the manual wheelchair, and so that a force exerted on the gripping portion to cause rotation of the lever support in its second direction of rotation causes an absence of contact or a sliding contact between the handrail and the support support, which allows the free rotation of the lever support in the second direction of rotation, and places thus the device in its disengaged position.
  • the means for fixing the lever support able to place the free lever support in rotation about the axis of rotation of the wheel, can for example be fixed on the axis of rotation of the wheel, or even on the hub or one or more spokes of the wheel.
  • the first direction of rotation of the lever support tends to bring the lever support closer to the point of contact of the support support. In other words, according to its first direction of rotation, the lever support moves in the direction of the support support. In other words, the first direction of rotation of the lever support tends to reinforce the support of the point of contact of the support support against the handrail, so that the support support is bent over the hand common.
  • the device can allow a disabled person, dependent on a wheelchair to make his movements, to use his wheelchair with a simplified and intuitive handling while limiting the best physical efforts to provide.
  • the device can especially be easily adapted to an existing wheelchair, and can provide the disabled person with additional travel assistance to reduce the risk of developing joint problems, particularly in the arms and / or shoulders.
  • the principle of actuating the lever of the device according to the invention can allow a sliding of the device relative to the handrail, which facilitates the reduction of the propulsive force by the disabled person and authorizes the design of a device of low weight.
  • the use of such a device is not necessarily permanent, it can also be perceived as a convenient low-cost accessory that can be fixed on the wheelchair when the situation requires too much effort only with the handrails or with the aim of preserving muscle joints.
  • the invention can also allow the assembly and disassembly of the device on a manual wheelchair without requiring the assembly and disassembly of the wheels of the chair.
  • the handling device according to the invention may further comprise one or more of the following characteristics taken separately or in any possible technical combinations.
  • the device according to the invention has a low total weight, especially less than or equal to about 300 g, more preferably less than or equal to about 200 g.
  • the device can advantageously be configured to be mountable and removable on the manual wheelchair, in particular on a wheel of the manual wheelchair.
  • the disabled person can for example transport the device with it and use it as and when it is needed, especially when the wheelchair has to be moved on a floor that requires too much physical effort to propel itself. when only the handrail is used.
  • the handrail of the wheel may be in the form of a tube, of circular or flattened section, extending around the entire periphery of the wheel.
  • the handrail and the wheel advantageously have the same axis of rotation.
  • the lever support may have substantially a longitudinal shape, particularly rectilinear, from the center of rotation of the wheelchair wheel to the distal end of the gripping portion of the lever support.
  • the lever support can be fixed on the axis of rotation of the wheel by its proximal end, opposite to its distal end which can be confused with the distal end of the gripping portion.
  • the length of the lever support is advantageously greater than the radius of the handrail, so that the lever support can actually have a gripping portion extending outwardly relative to the handrail.
  • the lever support may be provided to be telescopic so as to increase or decrease the distance between the gripping portion and the axis of rotation of the wheel depending on the intensity of the physical effort that the disabled person wishes to provide for actuation of the lever support.
  • the various parts of the device according to the invention in particular the lever support and / or the support support, can be made of any type of material, for example metal, plastic, carbon fiber, or even wood. This choice may in particular depend on the characteristics of rigidity, weight, cost, feasibility, among others, sought for the device according to the invention.
  • the support support advantageously comes into contact with the handrail at its inner surface, that is to say oriented towards the axis of rotation of the handrail.
  • the support support may be possible to avoid difficulties of feasibility contact, such as the occurrence of unwanted slips, when the outer surface of the handrail or the tire is dirty, for example because of traffic on greasy ground, or even when the tire is underinflated or over- inflated.
  • the bearing support may have substantially a longitudinal shape, in particular rectilinear, from the attachment zone to the lever support towards the distal end of the support support adapted to come into contact with the handrail.
  • the support bracket can be attached to the lever bracket at the attachment area by its proximal end.
  • the length of the support support is advantageously less than or equal to the diameter of the handrail, especially the radius of the handrail, so as to come into contact with the handrail while being fixed on the part of the lever holder s extending internally with respect to the handrail.
  • the sum of the length of the support support and the length of the lever support between the axis of rotation of the wheel and the attachment area of the support support may be greater than or equal to the radius of the handrail.
  • the zone for fixing the support support to the lever support may be located in the upper third of the portion of the lever support extending internally relative to the handrail, that is to say between the handrail and two-thirds of the length of the lever support measured from the axis of rotation of the wheel.
  • the sliding can not take place between the support support and the handrail whatever the force exerted by the handicapped person on the gripping part of the lever support to cause the rotation of this one. ci according to its first direction of rotation towards the support support, the support support being indeed blocked against the handrail by bracing effect.
  • the device may further comprise an extension handle of the support support, extending for the most part externally relative to the handrail when the device is in place on the wheel, to allow the disabled person to train the support support along its axis of rotation.
  • the extension handle of the support support may correspond to a brake handle of the device according to the invention.
  • a force exerted on this brake handle to drive the support support in rotation towards the lever support can make it possible to generate a jamming contact by the bracing effect of the support support on the handrail having the effect of braking or stopping, the rotation of the handrail, and therefore the wheel.
  • the pinch or approach of the brake handle and the lever support can allow the braking of the wheel, in the manner of a brake handle of a bicycle.
  • a force exerted on this brake handle to rotate the support support away from the lever support can release or disengage the device causing the free rotation of the lever support about the axis of rotation of the handrail.
  • the device may also comprise an elastic return member fixed between the lever support and the support support.
  • the elastic return member may for example be constituted by a spring or an elastic.
  • the elastic return member may for example be attached to the support support, at or near the distal end of the support support.
  • the body of For example, resilient bias may be attached to the lever support at or near the distal end of the portion of the lever support extending inwardly from the handrail.
  • the elastic return member may advantageously have an initial tension, that is to say in the absence of stretching thereof, adapted to allow the approximation of the support support and the lever support to ensure the maintaining a permanent contact of the support support on the handrail, especially even in case of ovalization thereof, for example following defects and / or shocks.
  • the elastic return member may also have a maximum extension to separate the support support of the handrail, and for example to release a brake lining present on the support support of the handrail, in particular an enveloping brake lining to fit at least partially the shape of the tube of the handrail, in order to be able, among other things, to disassemble the device from the wheel.
  • the device may also comprise a locking member in the spaced apart position of the support support relative to the handrail so as to obtain an absence of contact between the support support and the handrail, the locking member extending between the support support and the lever support and being fixed to the support support or the lever support.
  • the locking member may be resilient, and may have sufficient elasticity to allow the support support and the lever support to be brought together by means of the brake handle to allow, for example, wheelchair maneuverability. in restricted space with use of the brake handle and the grip part. To do this, it may then be sufficient that the thrust exerted by the locking member between the support support and the lever support compensates for the tension of the elastic return member to ensure the permanent disengagement function, while allowing a certain deformation of the locking member when the brake handle is actuated until the contact between the handrail and the support of support can be established.
  • the elastic return member and the locking member can be replaced by one and the same piece ensuring single functions.
  • the device may also comprise means for attaching the lever support to the casing of the manual wheelchair, extending between the lever support and the casing of the manual wheelchair, the attachment means allowing the support of the lever support disengagement of the device and / or an aid to the thrust of the lever holder after a pull on the lever support exerted by the disabled person.
  • the attachment means may in particular be connected to the housing or front frame of the manual wheelchair, for example at the area where the legs of the disabled person are.
  • the attachment means may for example be attached to the housing of the manual wheelchair after placing the lever holder on the wheel.
  • the attachment means may be secured to the lever support at the distal end of the lever support, particularly coincident with the distal end of the gripping portion.
  • the fastening means may be slidable inside the lever support, and if necessary fixed to the axis of rotation of the wheel, or near the axis of rotation, so as to allow greater amplitude and greater flexibility.
  • the attachment means may preferentially be elastic, being in particular extensible more than twice, or even three times, with respect to its initial length, that is to say its length in the absence of elongation.
  • the attachment means may for example be a tensioner or a roller system.
  • attachment means When the attachment means is designed to be sufficiently flexible, it can serve to support the lever support when the latter is not used, that is to say in particular when the device is disengaged.
  • the attachment means when the attachment means is provided to be sufficiently rigid, or when associated with other attachment means of greater rigidity, for example with between 5 and 10 kg of tension force when the actuation of the lever support results in the elongation of the attachment means, the tensile force of the lever support causing the stretching of the attachment means can serve as a reserve potential energy for the thrust force on the lever support.
  • the tension of the attachment means which increases when it is pulled on it, can serve as a help to the handicapped person when it pushes on the lever support to the point of attachment of the attachment means on the casing of the wheelchair since the elastic return of the attachment means facilitates this thrust force.
  • This additional assistance provided to the disabled person for the pushing effort may be particularly useful when the wheelchair moves on difficult terrain, such as sloping terrain, grassland, gravel, between other because the wheelchair may tend to stop between two pushing forces.
  • the handle portion of the lever bracket may include a pivotable handle rotatably mounted about the lever bracket, and a link support attached to the pivot handle at a first end thereof and the support support to a second one of its ends, opposite to the first end, so that the rotation of the pivoting handle in a first direction brings about a connection between the support support and the handrail, and that the rotation of the pivoting handle in a second direction, opposite the first direction, causes a spacing between the support support and the handrail.
  • the link support can thus provide a connection between the pivoting handle and the support support, each rotation of the pivoting handle for locking or to discard the contact between the support support and the handrail.
  • the rotation of the pivoting handle can thus make it possible to replace the use of the brake handle described above.
  • the rod support may further comprise, at its second end secured to the support support, an aperture in which slides a mounting stud of the support support. In this way, it may be possible to allow a vacuum stroke of the pivoting handle between clutch and disengagement states of the device. so as to preserve the self-tightening or the bracing effect between the support support and the handrail when the locking member leaves free rotation of the support support.
  • the support support may further comprise a brake lining support adapted to come into contact with the handrail.
  • the brake lining support also called brake pad support, may in particular be located on the distal end of the support support.
  • the brake lining support can have an enveloping shape to fit the profile of the handrail.
  • the brake lining support may have in section a "bowl" shape.
  • the brake lining support may have a wraparound shape provided to avoid friction of the brake lining support with the brackets of the handrail on the wheel.
  • the brake lining support may have a point of contact or a contact surface with the handrail.
  • the brake lining support can be made of any type of material, being for example similar to a brake lining of a bicycle.
  • the material of the brake lining support may be chosen according to the material of the handrail in order to obtain a coefficient of adhesion between the brake lining support and the handrail which makes it possible to obtain an angle of friction adapted to the choice of positioning of the fixing zone between the lever support and the support support.
  • the fixing means of the lever support on the axis of rotation of the wheel may further include a threaded piece, adapted to engage on the axis of rotation of the wheel during assembly of the device to be fixed permanently , the lever support then being mounted in rotation on the threaded part.
  • the threaded part is advantageously placed on the original axis of rotation of the wheel of the manual wheelchair, also called rapid disassembly axis of the wheel, replacing the original adjustment nut of the wheel.
  • the threaded part may comprise a pusher element forming an extension of the original pusher of the wheel, so that the wheel can be dismountable even if the device according to the invention is in place on the wheel.
  • the threaded part may further comprise one or more recesses, for example grooves or holes, and in particular two diametrically opposite recesses, to allow the establishment of a locking wheel when the device according to the invention has been installed.
  • the lock may for example correspond to a pin or a more elaborate locking system.
  • the threaded part for mounting the device according to the invention on the wheel of the manual wheelchair can be left permanently in place on the axis of rotation of the wheel, even in case of disassembly of the device according to the invention without changing the overall aesthetic appearance of the wheelchair.
  • the length of the threaded piece may advantageously be chosen to allow an elongation of the rapid disassembly axis of the wheel so as to be able to position the lever support on this axis.
  • the length of the threaded piece may be of the order of 1 to 3 cm.
  • the securing means may further comprise a fixing ring support, inside which is able to slide the threaded piece, so that the fixing ring support is rotatably mounted relative to the threaded piece.
  • the lever support can then be secured to the fixing ring support so that it can be rotated around the threaded part.
  • the fixing ring support may comprise an external thread and two nuts intended to come on either side of the lever support, so as to allow the adjustment of the distance between the lever support according to the type of wheel used, the offset of the hub relative to the handrail is not standardized on manual wheelchairs.
  • the device may further comprise an electric power assistance module in the form of a rotatable motorized roller intended to be placed in contact with the handrail, the rotation of the roller causing the rotation of the handrail.
  • an electric power assistance module in the form of a rotatable motorized roller intended to be placed in contact with the handrail, the rotation of the roller causing the rotation of the handrail.
  • the power assist module may be of low weight. It may for example be in the form of a motorized roller type Solex ® .
  • the electric assist module can be used with or as a replacement for the brake lining support of the support bracket.
  • the power assistance module may for example have an operating autonomy of at least 3 minutes, more preferably 5 minutes, for example between 5 and 10 minutes. In this way, the disabled person can, if necessary, use this electric assistance module in place of the handrail and / or the handling device so as to be able to move, particularly when the chair is located on a floor. terrain with several obstacles.
  • the power assistance module can be provided to remain discreet and located on a reduced portion of the wheel, so as not to cause discomfort for the disabled person.
  • the return torque of the electric assistance module can be supported by a fastening means, in particular of the tensioning type, as described above, fixed to the casing of the manual wheelchair.
  • the invention further relates, in another of its aspects, a wheelchair wheel manual for disabled person, characterized in that it is equipped with a handling device as defined above.
  • the invention also relates, in another aspect, a manual wheelchair for disabled person, characterized in that it comprises a handling device as defined above or a wheel as defined above.
  • Another object of the invention is, according to another of its aspects, an electric assistance module for the movement of a wheelchair wheel for a handicapped person, characterized in that it is in the form of a rotary motorized roller placed in contact with the handrail of the wheel, the rotation of the roller causing rotation of the handrail.
  • the operability method and the electrical assistance module according to the invention may comprise any of the previously mentioned characteristics, taken alone or in any technically possible combination with other characteristics.
  • proximal (e) and distal (e) are to be understood with respect to the axis of rotation X of the wheel 10, the term “proximal (e)” referring to what is closer to the axis of rotation X and the term “distal (e)” refers to what is further from the axis of rotation X.
  • proximal end of an element is closer to the axis of rotation X of the wheel 10 that its distal end, which is opposite.
  • the terms “internally” and “externally” are used with reference to a radial direction, that is to say a direction perpendicular to the axis of rotation X of the wheel 10, so that, for example, a first member extending inwardly relative to a second member is closer to the axis of rotation X of the wheel 10 than the second member. Similarly, a first member extending externally relative to a second member is further away from the axis of rotation X of the wheel 10 than the second member.
  • the figure 1 represents a first simplified embodiment of a manual wheelchair wheel handling device 10 according to the invention, positioned relative to the handrail 11 of the wheel 10.
  • the device 1 comprises a lever support 2 rotatably mounted around the axis of rotation X of the wheel 10, coinciding with the axis of rotation of the handrail 11.
  • the lever support 2 is thus able to be driven into position. rotation according to its first direction of rotation F1, corresponding to the clockwise direction on the figure 1 , and in its second direction of rotation F2, opposite the first direction of rotation F1.
  • the lever support 2 has a rectilinear shape and its proximal end is fixed to the axis of rotation X of the wheel 10 by means of a fixing means 4, which will be described in more detail hereinafter with reference to FIG. the figure 9 .
  • Fixing the lever support 2, and therefore the device 1, on the axis of rotation X of the handrail 11 is very simple without requiring major modification of the wheel 10 beforehand.
  • the lever support 2 comprises a first portion P i extending internally relative to the handrail 11 and a second portion P e extending outwardly relative to the handrail 11.
  • a gripping portion 3 On this second portion P e of the lever support 2 is a gripping portion 3 for the disabled person, this gripping portion 3 being even confused with the second part P e in this example although it is not limiting.
  • the gripping portion 3 allows the disabled person to handle the device 1 according to the invention to control the movements of the manual wheelchair 20.
  • the gripping portion 3 may allow the disabled person to exert a push on this gripping portion 3 for the rotational drive of the lever support 2 according to its first direction of rotation F1 and to exert traction on this gripping portion 3 for the rotational drive of the lever support 2 according to its second direction of F2 rotation.
  • the device 1 also comprises a support support 5 fixed on the lever support 2 at its first portion P i extending internally relative to the handrail 11, between the axis of rotation X of the wheel 10 and the handrail 11.
  • the support 5 is for example in a rectilinear form, and is fixed on the lever support 2 by its proximal end.
  • the point or area of attachment 6 of the support support 5 to the lever support 2 is located in the upper third of the first portion P i of the lever support 2 extending internally relative to the handrail 11 , that is to say one-third of the length of this first part P i located near the handrail 11.
  • the support 5 is mounted, at the attachment point 6, in rotation relative to the lever support 2 about an axis of rotation Y, the support 5 extending between the lever support 2 and a contact point C, configured to come into contact C of the handrail 11 during rotation of the support 5 around its axis of rotation Y.
  • the location of the attachment point 6 of the support d support 5 on the lever support 2 and / or the length of the support 5 can be chosen so that the support 5 can have a point of contact C with the handrail 11 during its rotation around the Y axis.
  • the support support 5 can in particular come into contact with the handrail 11 by its distal end.
  • the bearing support 5 comes in particular in contact with the inner surface of the handrail 11, that is to say the surface of the handrail 11 oriented towards the axis of rotation X of the wheel 10.
  • the attachment point 6 of the support 5 on the support lever 2 can be chosen on the first portion P i of the lever support 2 extending internally relative to the hand 11 so that: a) a force exerted on the gripping portion 3 by the handicapped person to cause the rotation of the lever support 2 in its first direction of rotation F1 towards the support 5 causes the contact C between the distal end of the support 5 and the handrail 11, which blocks the rotation of the lever support 2 in the first direction of rotation F1 by bracing, and thus causes a propulsion of the manual wheelchair 20 and, b) so that a force exerted on the gripping portion 3 to cause the rotation of the lever support 2 according to its second direction of rotation F2, opposite the first direction of rotation F1, causes no contact or a cont act sliding between the handrail 11 and the support support 5, which authorizes the free rotation of the lever support 2 according to the second direction of rotation F2, and thus places the device 1 in its disengaged position.
  • any force and increase of this force applied to the gripping portion 3 by the handicapped person to cause a rotation of the lever support 2 according to its first direction of rotation F1 creates, by pivoting, an approximation and an increase in adhesion to the point of contact C between the support 5 and the handrail 11, such that sliding becomes impossible.
  • any force applied to the gripping portion 3 by the disabled person to cause a rotation of the lever support 2 according to its second direction of rotation F2, opposite the first direction of rotation F1 tends to move the support 5 away from the contact point C, that is to say the handrail 11, so disengaging the device 1 and allowing free rotation of the lever support 2.
  • the device 1 provides a forward thrust multiplied due to the length of the lever holder 2 greater than the radius of the handrail 11.
  • the lever holder 2 may also include a gripping portion 3 mounted in a telescopic manner with respect to the remainder of the lever support 2 to increase the force torque directly proportional to the total length of the lever support 2.
  • the disabled person therefore has the possibility of propelling forward his wheelchair 20 with less physical effort, to propel it back to back or turn on the spot, to perform a progressive braking in before, and release the device 1 after declutching to resume the handling of the handrail 11 directly if necessary.
  • the device 1 can operate and fit on a manual wheelchair 20 having defects, including geometric, its wheels 10.
  • the device 1 can be adapted to a wheel 10 of the wheelchair 20 even if the handrail 11 of the wheel 10 is oval, for example of the order of 1 cm, and / or off-center with respect to the axis of rotation X of the wheel 10, which can for example occur in the case where the brackets of the handrail 11 are bent.
  • the invention therefore uses a support principle for the propulsion of the wheelchair 20 which rests directly on the handrail 11 to limit the weight and simplify the device 1.
  • lever support 2a and 2b are shown, the lever support 2a carrying an example of a support support 5a and the support of lever 2b bearing two examples of support support 5b and 5c. These examples will be detailed later.
  • the mechanical action R of the contact C between the support 5a, 5b or 5c and the handrail 11 has a direction inclined at an angle ⁇ relative to the normal axis of the handrail 11, its component normal N being oriented externally to the handrail 11 and its tangential component T being located in the tangent plane coinciding with the surfaces in contact in the direction of the vector V.
  • the angle of friction ⁇ is 45 °.
  • This condition of non-adhesion between the support 5a, 5b or 5c and the handrail 11 can also be formulated as follows.
  • the attachment zone 6 of the support 5a, 5b or 5c on the lever support 2a or 2b must be located inside the friction cone C f of the contact C, as shown.
  • This friction cone C f has the contact C at the top and the angle of friction ⁇ at the top half-angle.
  • the fixing zone 6 being also located inside the handrail 11, it must be located in zone Z, represented by dots, which corresponds to the intersection between the friction cone C f and the Inside the handrail 11.
  • the support 5a is fixed on the lever support 2a close to the axis of rotation X of the handrail 11, so that it may tend to bend the lever support 2a at the attachment zone 6.
  • the lever support 2a may thus need to be reinforced and therefore be heavier.
  • the support 5c is fixed on the lever support 2b close to the axis of rotation X of the handrail 11, and forming an angle ⁇ much smaller than the angle ⁇ , so that the end of the support 5c in contact with the handrail 11, optionally coated with a lining, may have a risk of crushing.
  • the support 5b is fixed on a median portion of the lever support 2b, sufficiently far from the axis of rotation X of the handrail 11 and the handrail 11, so that this configuration confers little constraints in terms of bending the lever support 2b and crushing the end of the support 5b.
  • the handling device 1 may further comprise a handle 7 extending the support support 5.
  • the handle 7 extends for the most part externally relative to the handrail 11, and allows the disabled person to drive the support 5 according to its axis of rotation Y.
  • the handle 7 for extending the support 5 corresponds to a brake handle 7 for the device 1 according to the invention.
  • This brake handle 7 can thus be handled with the hand or fingers of the user.
  • the aim is thus to be able to brake the manual wheelchair 20 by pivoting the support 5 towards the lever support 2 by means of the brake handle 7, so as to more or less flatten the point of contact C of the support 5 on the handrail 11.
  • the braking force is then directly proportional to the force applied to the brake handle 7.
  • the brake handle 7 may also allow the support support 5 to be displaced from the lever support 2, so as to obtain an absence of contact between the support support 5 and the handrail 11 which makes it possible to pivot the lever support 2 forward without self-tightening.
  • a traction exerted on the brake handle 7 and the lever support 2 when they have been brought closer to each other by pinching until a jamming by bracing, can allow rearward propulsion to roll back the manual wheelchair 20.
  • the handling device 1 may also comprise an elastic return member 8 fixed between the lever support 2 and the support support 5.
  • the elastic return member 8 may in particular make it possible to maintain an initial contact C between the support 5 and the handrail 11.
  • the elastic return member 8 may for example be constituted by a spring or an elastic.
  • the elastic return member 8 advantageously has an initial tension sufficient to be able to bring the support 5 to the lever support 2 to the point of ensuring a permanent contact between the support 5 and the handrail 11, even in case ovalization thereof due to defects and / or shocks.
  • the maximum extension of the elastic return member 8 may be sufficient to make it possible to disengage the support support 5, and possibly the brake lining support 19 of the support 5 as will be described hereinafter. after, handrail 11 when the disabled person decides to disassemble the device 1.
  • the figure 5 illustrates the possibility for the device 1 according to the invention to include a locking member 9 in the spaced apart position of the support 5 relative to the handrail 11 so as to obtain an absence of contact C between the support of 5 and the handrail 11, the locking member 9 extending between the support 5 and the support lever 2 and being fixed to the support 5 or the lever support 2.
  • the locking member 9 can make it possible to ensure a permanent disengagement of the device 1 when it is positioned correctly between the support support 5 and the lever support 2. The disabled person can then decide to propel himself in an ordinary way with using the handrail 11.
  • a certain elasticity of the locking member 9 may allow to keep the advantage of always being able to use the brake handle 7 to bring the support 5 of the handrail 11 with each tightening of the brake handle 7 to the lever support 2. This can maintain wheelchair maneuverability in restricted space with the brake handle 7 and the gripping portion 3.
  • the thrust of the locking member 9 must be able to compensate the force of the elastic return member 8 to ensure the permanent disengagement function, while being able to allow the locking member 9 to be able to deform when the brake handle 7 is actuated, until the contact C on the handrail 11 is established.
  • a single piece can be used to play the role of the elastic return member 8 and that of the locking member 9.
  • the handling device 1 may also comprise, as illustrated in FIG. figure 6 , a fastening means 12 of the lever support 2 to the casing 13 (or frame) of the manual wheelchair 20, extending between the lever support 2 and the casing 13 of the manual wheelchair 20.
  • the fastening means 12 can allow the lever support 2 to be supported in the event of the device 1 being disengaged and / or a thrusting aid of the lever support 2 after a pull on the lever support 2 exerted by the lever support 2. the disabled person.
  • the attachment means 12 may for example be in the form of a tensioner or a roller system. It can have an elongation power of 2 to 3 times between its initial position and that stretched (when the lever support 2 is located back).
  • the front part of the attachment means 12 can be fixed to the casing or frame 13 of the wheelchair 20 after the lever support 2 has been placed on the wheel 10.
  • the rear part of the attachment means 12 is secured to the distal end of the lever support 2 or can also slide inside the lever holder 2 for greater amplitude and flexibility, as can be seen in the figure 8 .
  • the fastening means 12 can, if it is very flexible, serve only to support the lever support 2 when it is not used, that is to say when it is disengaged and not used by the disabled person .
  • the fastening means 12 is more rigid, or supported by other means of attachment more rigid, for example with 5 to 10 kg of tension force when the lever support 2 is brought back, the tensile force Arms of the disabled person can serve as a potential energy reserve for pushing effort forward. This can then be very useful on a difficult ground where the wheelchair 20 tends to stop between two outbreaks (grass, gravel, slope, ).
  • the figure 7 illustrates the possibility for the handling device 1 according to the invention to include a pivoting handle 14 at the gripping portion 3 of the lever support 2.
  • the pivoting handle 14 is rotatably mounted around the lever support 2 It can have an ergonomic shape to allow easy entry by the disabled person.
  • the device 1 may further comprise a link support 15 fixed by a first end 15a to the pivoting handle 14, and by a second end 15b to the support support 5.
  • a link support 15 fixed by a first end 15a to the pivoting handle 14, and by a second end 15b to the support support 5.
  • This solution can thus be an alternative to actuating the braking, clutch and / or disengagement via the pivoting handle 14 instead of the use of the brake handle 7.
  • the link support 15 may comprise, at its second end secured to the support 5, an aperture 16 in which slides a mounting stud 17 of the support support 5.
  • the link support 15 may comprise, at its second end secured to the support 5, an aperture 16 in which slides a mounting stud 17 of the support support 5.
  • the support support 5 may further comprise a brake lining support 19 adapted to come into contact with the handrail 11.
  • the brake lining support 19 may have an enveloping shape to fit the profile of the handrail 11, which may for example comprise a rim extending outside the handrail 11, or two flanges extending on both sides of the handrail 11.
  • the figure 8 also illustrates the possibility of providing the attachment means 12 in a sliding form inside the lever support 2, being fixed for example to the axis of rotation X of the wheel 10.
  • the attachment means 12 can thus to be fixed to the casing 13 of the wheelchair 20 and to penetrate inside the lever support 2 by means of a pulley 18, placed at the distal end of the lever support 2.
  • This attachment means 12 can thus ensure the horizontal maintenance of the lever support 2 when it is not in use and, where appropriate, provide a function of using the traction force behind the lever support. 2 to ensure part of the thrust forward, as previously described.
  • figures 8 and 9 also illustrate the possibility for the device 1 according to the invention to include an electric assistance module 21, a mobility aid for the disabled person, in the form of a rotating motorized roller placed in contact with the handrail 11.
  • the rotation of the roller causes rotation of the handrail 11.
  • the force of the attachment means 12 determines the maximum force of the electric assistance module 21.
  • the figure 10 illustrates also the principle of attachment of the handling device 1 according to the invention on the axis of rotation X of the wheel 10.
  • the central fixing of the lever support 2 on the quick disassembly axis X of the wheel 10 can be done by replacing the short nut usually located on the quick disassembly axis X of the wheel 10, by a threaded piece 22 elongated.
  • the threaded part 22 may in particular comprise an internal thread 26a for the permanent fixing of the threaded piece 22 on an external thread 26b of the fast disassembly axis X of the wheel 10.
  • the threaded part 22 may comprise recesses 25, in particular two diametrically opposed recesses 25, which allow the locking of the wheel 10 to be implemented when the device 1 according to the invention has been installed on the wheel 10.
  • This locking can for example be carried out using a pin or other more elaborate locking system.
  • the threaded part 22 may comprise an extension 31a of the wheel unlocking pusher 31b present on the rapid disassembly axis X of the wheel 10, as illustrated.
  • the threaded part 22 then allows the device 1 to be mounted on the wheel 10 of the manual wheelchair 20 and can be left permanently in place on the axis of rotation X of the wheel 10, even if the device is disassembled. 1, without modifying the overall aesthetic appearance of the wheelchair 20.
  • the fixing means 4 may also comprise a fixing ring holder 23, inside which the threaded piece 22 is slidable, so that the fixing ring holder 23 is rotatably mounted by relative to the threaded part 22.
  • the lever support 2 can then be secured to the fixing ring support 23 so as to be rotated around the threaded piece 22.
  • the fixing ring support 23 comprises an external thread 27 and two nuts 29a and 29b, intended to come on either side of the lever support 2, so as to allow the adjustment of the distance between the support of lever 2 depending on the type of wheel used.
  • the offset of the hub of a wheelchair wheel manual relative to the handrail is not standardized on manual wheelchairs, so that the use of a mounting ring holder 23 as proposed can accommodate any type of manual wheelchair.
  • FIGS 11A to 11D illustrate, furthermore, an example of a method of operability of a manual wheelchair 20 by a handicapped person P, the chair 20 being equipped with two handling devices 1 according to the invention (a device 1 for each wheel 10).
  • Figures 11A to 11D illustrate the successive stages that the handicapped person P implements for the crossing of a sidewalk.
  • the handicapped person P exerts a forward thrust on the gripping portions 3 of the lever supports 2 of each handling device 1 according to the first directions of rotation F1 of the lever supports 2, so as to advance the wheelchair
  • the thrust exerted on the gripping portions 3 of the lever supports 2 causes, as previously described, a contact C between the support supports 5 of each handling device 1 and the handrails 11 of each wheel 10, which engenders jamming by the bracing effect, so that the forward drive of the lever supports 2 also drives the handrails 11, and thus the wheels 10 of the manual wheelchair 20.
  • the handicapped person P exerts traction on the gripping portions 3 of the lever supports 2 according to their second direction of rotation F2 in order to disengage the handling device 1 so as to bring the lever supports 2 back.
  • the handicapped person P can also choose to bring the support supports 5 of the lever supports 2, for example by means of the use of the brake handles 7 as described above, in order to obtain a contact C between the support supports 5 and the lever supports 2 which makes it possible to brake the manual wheelchair 20.
  • the handicapped person P can also choose to bring the support supports 5 of the lever supports 2 to obtain a contact C between them blocking by bracing and exert a pull on the assemblies formed by the support supports 5 and the lever supports 2, for example by strongly pinching the brake handles 7 and the gripping portions 3, so that it is possible to roll back the manual wheelchair 20.
EP14199327.9A 2013-12-26 2014-12-19 Vorrichtung zur Handhabung eines manuell bedienbaren Rollstuhlrads für Behinderte Not-in-force EP2889023B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1363599A FR3015885B1 (fr) 2013-12-26 2013-12-26 Dispositif de maniement de roue de fauteuil roulant manuel pour personne handicapee

Publications (2)

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EP2889023A1 true EP2889023A1 (de) 2015-07-01
EP2889023B1 EP2889023B1 (de) 2016-10-19

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US (1) US20150182395A1 (de)
EP (1) EP2889023B1 (de)
FR (1) FR3015885B1 (de)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869146A (en) 1973-02-08 1975-03-04 Donald L Bulmer Occupant actuated means for propelling, stopping, directing, and curb hopping a wheelchair
US3877725A (en) 1973-03-26 1975-04-15 Herbert Barroza Wheel driving apparatus
EP0728095A1 (de) 1992-02-04 1996-08-28 Brian M. Watwood Rollstuhl mit antriebseinheit und bremssystem
US5988661A (en) 1997-02-27 1999-11-23 Garfinkle; Moishe Drive assistance device for ordinary wheelchairs
US20020043781A1 (en) 1996-07-23 2002-04-18 Raymond L. Mitchell "wheelchair propulsion kit"
US20050275190A1 (en) 2004-06-10 2005-12-15 Pettit Frank P Wheelchair propulsion device
WO2008047088A2 (en) 2006-10-16 2008-04-24 Pure Global Limited Propulsion apparatus
EP1966036A2 (de) 2005-08-01 2008-09-10 Design in Motion, Inc. Ergonomisches rollstuhlantriebssystem
WO2009025815A1 (en) 2007-08-20 2009-02-26 Daedalus Wings, Inc. Hand grip motion control capabilities for a lever propulsion wheelchair
US20100320719A1 (en) * 2005-08-01 2010-12-23 Rand Ethan Ergonomic wheelchair propulsion system
US20110187075A1 (en) 2010-01-27 2011-08-04 Rong-Jen Wu Wheelchair driving apparatus
JP2012223551A (ja) 2011-04-19 2012-11-15 Masaji Kobayashi 車椅子の動力導入装置
US20130062857A1 (en) 2009-10-28 2013-03-14 V Amos G. Winter Wheelchair with lever drivetrain

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3309110A (en) * 1965-09-13 1967-03-14 Donald L Buhner Occupant-propelled wheelchair
US5232236A (en) * 1992-04-02 1993-08-03 Emil Korpi Leveraged hand propeller for a wheel chair with brake

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869146A (en) 1973-02-08 1975-03-04 Donald L Bulmer Occupant actuated means for propelling, stopping, directing, and curb hopping a wheelchair
US3877725A (en) 1973-03-26 1975-04-15 Herbert Barroza Wheel driving apparatus
EP0728095A1 (de) 1992-02-04 1996-08-28 Brian M. Watwood Rollstuhl mit antriebseinheit und bremssystem
US20020043781A1 (en) 1996-07-23 2002-04-18 Raymond L. Mitchell "wheelchair propulsion kit"
US5988661A (en) 1997-02-27 1999-11-23 Garfinkle; Moishe Drive assistance device for ordinary wheelchairs
US20050275190A1 (en) 2004-06-10 2005-12-15 Pettit Frank P Wheelchair propulsion device
US20100320719A1 (en) * 2005-08-01 2010-12-23 Rand Ethan Ergonomic wheelchair propulsion system
EP1966036A2 (de) 2005-08-01 2008-09-10 Design in Motion, Inc. Ergonomisches rollstuhlantriebssystem
WO2008047088A2 (en) 2006-10-16 2008-04-24 Pure Global Limited Propulsion apparatus
WO2009025815A1 (en) 2007-08-20 2009-02-26 Daedalus Wings, Inc. Hand grip motion control capabilities for a lever propulsion wheelchair
US20130062857A1 (en) 2009-10-28 2013-03-14 V Amos G. Winter Wheelchair with lever drivetrain
US20110187075A1 (en) 2010-01-27 2011-08-04 Rong-Jen Wu Wheelchair driving apparatus
JP2012223551A (ja) 2011-04-19 2012-11-15 Masaji Kobayashi 車椅子の動力導入装置

Also Published As

Publication number Publication date
US20150182395A1 (en) 2015-07-02
FR3015885A1 (fr) 2015-07-03
EP2889023B1 (de) 2016-10-19
FR3015885B1 (fr) 2016-02-19

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