EP3243492B1 - Rollstuhl zur einnahme einer aufrechten position mit rückwärtig vertikalisierendem und abwärts gerichtetem bewegungsverlauf der fussstütze - Google Patents

Rollstuhl zur einnahme einer aufrechten position mit rückwärtig vertikalisierendem und abwärts gerichtetem bewegungsverlauf der fussstütze Download PDF

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Publication number
EP3243492B1
EP3243492B1 EP16168798.3A EP16168798A EP3243492B1 EP 3243492 B1 EP3243492 B1 EP 3243492B1 EP 16168798 A EP16168798 A EP 16168798A EP 3243492 B1 EP3243492 B1 EP 3243492B1
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EP
European Patent Office
Prior art keywords
deformable
deformable quadrilateral
chassis
quadrilateral
footrest
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Application number
EP16168798.3A
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English (en)
French (fr)
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EP3243492A1 (de
Inventor
François Porcheron
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4 Power 4
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4 Power 4
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Publication of EP3243492A1 publication Critical patent/EP3243492A1/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
    • A61G5/14—Standing-up or sitting-down aids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • A61G5/128—Rests specially adapted therefor, e.g. for the head or the feet for feet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/042—Front wheel drive

Definitions

  • the present invention relates to wheelchairs used by disabled and disabled persons designed to be made verticalizers to temporarily maintain the user in a substantially upright position.
  • the state of the art has proposed many so-called verticalization wheelchair solutions generally involving an articulated structure comprising a backrest, a seat and a footrest.
  • a structure is mounted articulated generally by the seat on a horizontal front axis and perpendicular to the vertical plane of symmetry of the frame.
  • a motor member is interposed between the frame and the articulated structure to allow the raising or lowering of the latter and able to occupy a folded said seat position and a vertical said unfolded position.
  • the motor unit can be indifferently manual or electric control.
  • the document WO 95/25497 describes a standing wheelchair comprising a frame provided with wheels defining a support polygon and supporting an articulated structure.
  • This articulated structure comprises a first deformable quadrilateral supporting a seat and having two lower ends mounted on the frame.
  • This articulated structure also comprises a second deformable quadrilateral supporting the footrest and an elevation control system lowering the articulated structure.
  • This control system comprises a motor member interposed between the frame and the articulated structure and adapted to control the displacement of deformable quadrilaterals between a folded stable state and an unfolded stable state corresponding to the vertical position.
  • the characteristics of the deformable quadrilaterals are chosen by construction so that, after the movement of the drive member, the seat and the backrest are substantially aligned in a slight inclination while the footrest is retrotected by the inclination inside the support polygon defined by the wheels of the chair. Positioning the user verticalized within the support polygon gives the wheelchair brought into such a position, a stable state allowing movement via the wheels.
  • the articulated structure During the transition from the folded stable state (sitting position of the user) to the unfolded stable state (vertical position), the articulated structure knows a retrodelplacement with an upward movement of the footrest.
  • This retroverticalization operation leads to raising the user, which requires developing a significant mechanical effort to lift the user and simultaneously perform anteroposterior movement. It follows that the center of gravity of the user rises during the verticalization operation does not give the user a good impression of stability in a vertical position. In the same sense, it proves difficult to verticalize large users who are in a position too high.
  • the present invention aims to overcome the drawbacks of the prior art by providing a wheelchair designed to cause, during verticalization, a retrodelocation of the articulated structure to center verticalized load relative to the support polygon of the chair, while conferring the user stability and security in vertical position of the chair.
  • the subject of the invention relates to a wheelchair 1 comprising a chassis C delimiting a platform 2, equipped with front wheels 3 and rear wheels 4.
  • the wheelchair 1 is a front wheelchair.
  • the wheels 3 which are placed at the front of the chassis C are carrier and motor while the wheels 4 which occupy the rear part of the wheelchair, are steerable and adjustable by means of a control mechanism 5 of any known type. in itself.
  • the wheels 3, 4 define, by the points of contact with the ground T, a support or lift polygon in which is positioned the mass or load P represented by the articulated structure S ( Fig. 5, 6 ).
  • the front wheels 3 are mounted on the chassis C by means of bearings and can advantageously be associated with a drive 6 of reversible rotation drive such as one or more electric motors, capable of being powered from a embedded source and arranged on the platform 2.
  • a drive 6 of reversible rotation drive such as one or more electric motors, capable of being powered from a embedded source and arranged on the platform 2.
  • the wheelchair 1 is equipped with a moving control unit such as a joystick for controlling the direction and movement of the wheelchair 1.
  • the chassis C supports an articulated structure S comprising a seat A, a backrest D and a footrest R.
  • articulated structure S is organized to be able to occupy a folded stable state corresponding to a so-called sitting position as illustrated in FIGS. Fig. 2 and 5 and an unfolded stable state corresponding to a position of verticalization as illustrated by the Fig. 1 , 4 and 6 .
  • the articulated structure S is able to support a disabled or disabled in a sitting position and in a vertical position respectively.
  • the articulated structure S is organized so that the seat A is carried by the frame C via a first deformable quadrilateral I organized in the illustrated example, into two lateral assemblies ( Fig. 1 ).
  • Each set of the first deformable quadrilateral I supports a seat A and comprises a first link 10 and a second link 11 extending parallel to each other.
  • These rods 10, 11 have lower ends 10i , 11i and opposite, upper ends 10s, 11s.
  • the lower ends 10i, 11i of the rods 10, 11 are mounted articulated on the chassis C via pins 14, 15 respectively .
  • the chassis C comprises, for each set of the first deformable quadrilateral I , an amount C1 rising substantially vertically from the rear of the frame and supporting the axes 14, 15 extending horizontally between them and on which the lower ends of the rods 10, 11 are hinged mounted.
  • One of the upper ends of a link, namely the end 10s of the first link 10 in the illustrated example is mounted articulated on the seat A by an axis 16 placed substantially in the middle part of the lower face of the sitting A.
  • the upper end 11s of the other link namely the second link 11 in the illustrated example, is mounted articulated by an axis 17 on a second deformable quadrilateral II supporting the footrest R.
  • the upper ends 10s, 11s rods 10 and 11 are interconnected by a transverse bar 19 mounted along the axes 16 and 17.
  • the first deformable quadrilateral I thus comprises the links 10, 11 interconnected at one of their ends by a post C1 , by being articulated about the axes 14, 15 , and at the other of their ends by the bar 19, being articulated about the axes 16, 17.
  • the rods 10 , 11 extend from the amounts C1 forward in a slightly inclined direction relative to the horizontal.
  • the upper ends 10s, 11s of the first deformable quadrilateral I are mounted on a second deformable quadrilateral II supporting the footrest R and organized in the example shown in two lateral assemblies.
  • Each set of the second deformable quadrilateral II comprises a first rigid bar 20 mounted above a second rigid bar 21.
  • These rigid bars 20, 21 are mounted parallel to each other and have lower ends 20i, 21i located in the front portion of the wheelchair and opposite upper ends 20s, 21s.
  • the two rigid bars 20, 21 are interconnected in their central parts, by the transverse bar 19 mounted on the rigid bars 20, 21 by the axes 16, 17 of articulation of the upper ends of the rods 10, 11 of the first deformable quadrilateral .
  • the transverse bar 19 thus constitutes a mobile part common to the first deformable quadrilateral I and the second deformable quadrilateral II .
  • the lower ends 20i, 21i of the rigid bars 20, 21 are mounted by pins 24, 25 on the footrest R.
  • the footrest R comprises a connecting plate 28 on which the pins articulation 24 and 25 of the rigid bars 20, 21.
  • Each set of the second deformable quadrilateral II thus comprises the two rigid bars 20 and 21 interconnected at one of their ends, by the transverse bar 19 being hinged about the axes 16 , 17 and at the other of their ends, by the connecting plate 28 being articulated about the axes 24, 25.
  • the footrest R For each set of the second deformable quadrilateral II, the footrest R comprises a leg 30 extending vertically downwardly being provided at its base, a sole 31 for a foot support of a user. Each leg 30 is articulated on the hinge pin 24 of the first rigid bar 20.
  • the two rigid bars 20 and 21 of the second deformable quadrilateral II extend substantially horizontally with the lower ends 20i , 21i located in front of the Wheelchair.
  • the two rigid bars 20 and 21 In unfolded position ( Fig. 4 ), the two rigid bars 20 and 21 extend substantially vertically being brought closer to each other with the lower ends 20i, 21i positioned in a low position.
  • the second deformable quadrilateral II is articulated at the end of a connecting rod 40 fixed to the frame C by a hinge pin 41.
  • the link 40 carries a hinge axis 43 for the second deformable quadrilateral II.
  • a crossmember 44 is fixed between the second rigid bars 21 of the two sets of the second deformable quadrilateral II, and is provided with a crankpin 45 mounted articulated on the axis 43 carried by the rod 40.
  • the link rod 40 of the second deformable quadrilateral II extends towards the front of the chair being inclined relative to the horizontal by a value for example of the order of 45 °.
  • the connecting rod 40 pivots rearwardly about the hinge axis 41 to the frame, to exceed in the unfolded position, slightly vertical upright position.
  • the articulated structure S comprises a third deformable quadrilateral III supporting a file D and organized in the illustrated example in two lateral assemblies ( Fig. 1 ).
  • Each set of the third deformable quadrilateral III comprises a backrest D mounted hinged by an axis 50 on the first rigid bar 20, this axis 50 ensuring the articulation of a connecting flange 51 mounted articulated on the second rigid bar 21 by an axis d articulation 53.
  • the backrest D In the folded stable position ( Fig. 2 ), the backrest D extends substantially vertically, perpendicularly to the seat A. In a stowed stable position ( Fig. 4 ), the backrest D extends substantially vertically parallel to the rigid bars 20, 21.
  • the wheelchair 1 also comprises a control system 60 in elevation / lowering of the articulated structure S.
  • This control system 60 includes in particular a motor member 62 interposed between the frame C and the articulated structure S.
  • the motor member 62 is mounted articulated on the frame C by an axis 64 and acts on the seat A of the articulated structure S by a hinge pin 65 placed substantially of the lower face medial portion. of the seat A.
  • This drive member 62 is controlled to ensure the displacement of the deformable quadrilaterals I , II and III between the folded stable state corresponding to the so-called seated position of the articulated structure and an unfolded stable state corresponding to the so-called verticalization position of the articulated structure.
  • the first I and the second II deformable quadrilaterals are mounted so that during the displacement of the deformable quadrilaterals I and II between the folded and unfolded stable states, the footrest R evolves in a backward-descending trajectory and vice versa during the movement of the deformable quadrilaterals between the unfolded and folded stable states.
  • the articulated structure S is in the folded position in a position such that the seat A is substantially horizontal and that the footrest R is located just in front of the front part of the chassis C and between the steering wheels 3.
  • the motor member 62 is controlled, in extension to lift the constituent elements of the first deformable quadrilateral I supporting the seat A.
  • the rods 10, 11 of the first deformable quadrilateral I are forced to pivot towards the rear of the chair in the direction of the arrow f1 ( Fig.3 ) along the axes 14 , 15 of articulation of the frame, in a circular trajectory having for center the axes 14 , 15 and for radius, the length of the rods 10, 11, this movement causing the lifting of the seat A namely the tilting of the seat A forward towards the floor.
  • the pivoting of the rods 10, 11 also leads to the displacement of the hinge pins 16 , 17 on the second deformable quadrilateral II.
  • the rigid bars 20, 21 pivot towards the ground T in the direction of the arrow f2, around the hinge pins 16, 17 of the rods 10, 11 and the hinge axis 43 of the rod 40. of this movement, the rigid bars 20, 21 follow a path defined by the quadrilateral passing through the hinge pins 14, 15, 16 and 17 and the hinge pin 43 carried by the rod 40.
  • the pivoting of rigid bars 20, 21 and in particular lower ends 20i, 21i downwards, causes the pivoting of the footrest R downwards and back of the chair.
  • the footrest R evolves in a backward-descending trajectory during the transition from the folded stable state to the unfolded stable state. Indeed, between these two stable states, ( Fig.
  • the footrest R has moved back towards the back of the wheelchair while descending towards the ground T.
  • the footrest R in a stable unfolded position ( Fig. 4 ) the footrest R is closer to the ground T than to the folded position ( Fig. 2 ) and has undergone a retro-displacement.
  • the lowering of the footrest R is conferred by the constructive characteristics of the second deformable quadrilateral II .
  • the characteristics of the deformable quadrilaterals I , II , III are chosen by construction so that, after the displacement of the drive member 62, the seat A and the backrest D are substantially placed in vertical alignment while the footrest R retrofit included within the support polygon defined by the wheels 3, 4.
  • the wheelchair according to the invention uses the force of gravity to effect the movement of verticalization of the user.
  • This displacement principle makes it possible to reduce the mechanical stresses supported by the articulated structure S, compared with existing solutions.
  • Another advantage of the chair according to the invention relates to obtaining a better stability for the user in a vertical position due to the lowering of the footrest R in this position.
  • the combination of this downward verticalization with a wheelchair for example front wheel drive provides a compact chair, with maintenance of the user load inside the lift polygon defined by the wheels 3 , 4 .
  • the deformable quadrilaterals are organized in two lateral sets, but it is clear that the deformable quadrilaterals can be made in a columnar form by being grouped on either side of the anteroposterior plane of vertical symmetry.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)

Claims (9)

  1. Vertikalisierungsrollstuhl mit einem Rahmen (C), der mit Rädern ausgestattet ist, die ein Stützpolygon bilden und eine Gelenkstruktur (S) tragen, umfassend:
    - ein erstes verformbares Viereck (I), das einen Sitz (A) trägt und zwei untere Enden (10i 11i) aufweist, die an dem Rahmen angebracht sind,
    - ein zweites verformbares Viereck (II), das eine Fußstütze (R) trägt, und
    - ein System (60) zur Anhebe- und Absenksteuerung der Gelenkstruktur (S), mit einem Antriebsorgan (62), welches zwischen dem Rahmen (C) und der Gelenkstruktur (S) angeordnet und geeignet ist, die Bewegung der verformbaren Vierecke (I, II) zwischen einem stabilen zusammengeklappten Zustand, der einer sogenannten Sitzposition der Struktur entspricht, und einem stabilen ausgeklappten Zustand, der einer sogenannten Vertikalisierungsposition der Struktur entspricht, zu steuern,
    dadurch gekennzeichnet, dass das erste verformbare Viereck (I) obere Enden (10s, 11s) aufweist, an denen das zweite verformbare Viereck angebracht ist, wobei das zweite verformbare Viereck (II) am Ende einer Stange (40) gelenkig angebracht ist, welche über eine Gelenkachse (41) an dem Rahmen befestigt ist, so dass bei der Bewegung der verformbaren Vierecke zwischen dem stabilen zusammengeklappten und dem stabilen ausgeklappten Zustand die Fußstütze sich entlang eines rückwärtsabwärts verlaufenden Weges bewegt und bei der Bewegung der verformbaren Vierecke (I, II) zwischen dem stabilen ausgeklappten und dem stabilen zusammengeklappten Zustand umgekehrt.
  2. Vertikalisierungsrollstuhl nach Anspruch 1, dadurch gekennzeichnet, dass das erste verformbare Viereck (I) zwei zueinander parallele Schwingarme (10, 11) umfasst, deren untere Enden (10i, 11i) über Achsen (14, 15) an dem Rahmen angebracht sind, während die oberen Enden (10s, 11s) der Schwingarme über Achsen (16, 17) an dem zweiten verformbaren Viereck angebracht sind, wobei eines der oberen Enden eines Schwingarms (10) über eine (16) dieser Achsen an dem Sitz angebracht ist.
  3. Vertikalisierungsrollstuhl nach Anspruch 2, dadurch gekennzeichnet, dass das zweite verformbare Viereck (II) zwei zueinander parallele starre Stäbe (20, 21) umfasst, deren untere Enden (20i, 21i) über Achsen (24, 25) an der Fußstütze angebracht sind, wobei die beiden starren Stäbe (20, 21) durch einen Querstab (19), der an den Gelenkachsen (16, 17) der oberen Enden der Schwingarme (10, 11) des ersten verformbaren Vierecks angebracht ist, untereinander verbunden sind.
  4. Vertikalisierungsrollstuhl nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das zweite verformbare Viereck (II) durch einen Zapfen (45) an einer Achse (43), welche am Ende der über eine Gelenkachse (41) an dem Rahmen befestigen Stange (40) angebracht ist, gelenkig angebracht ist.
  5. Vertikalisierungsrollstuhl nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Gelenkstruktur (S) ein drittes verformbares Viereck (III) umfasst, das eine Rückenlehne (D) trägt und über Achsen an den starren Stäben des zweiten verformbaren Vierecks angebracht ist.
  6. Vertikalisierungsrollstuhl nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Gelenkstruktur (S) durch verformbare Vierecke (I, II, III), die als zwei seitliche Anordnungen angeordnet sind, an dem Rahmen (C) angebracht ist.
  7. Vertikalisierungsrollstuhl nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Gelenkstruktur (S) durch verformbare Vierecke, die in Form einer Mittelsäule angeordnet sind, an dem Rahmen (C) angebracht ist.
  8. Vertikalisierungsrollstuhl nach Anspruch 1, dadurch gekennzeichnet, dass das Antriebsorgan (62) zwischen dem Rahmen (C) und dem zweiten verformbaren Viereck (II) angeordnet ist.
  9. Vertikalisierungsrollstuhl nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass er Traktionsvorderräder (3), die mit einer Motorisierung (6) verbunden sind, umfasst.
EP16168798.3A 2016-05-09 2016-05-09 Rollstuhl zur einnahme einer aufrechten position mit rückwärtig vertikalisierendem und abwärts gerichtetem bewegungsverlauf der fussstütze Active EP3243492B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16168798.3A EP3243492B1 (de) 2016-05-09 2016-05-09 Rollstuhl zur einnahme einer aufrechten position mit rückwärtig vertikalisierendem und abwärts gerichtetem bewegungsverlauf der fussstütze

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16168798.3A EP3243492B1 (de) 2016-05-09 2016-05-09 Rollstuhl zur einnahme einer aufrechten position mit rückwärtig vertikalisierendem und abwärts gerichtetem bewegungsverlauf der fussstütze

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EP3243492A1 EP3243492A1 (de) 2017-11-15
EP3243492B1 true EP3243492B1 (de) 2019-02-13

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EP16168798.3A Active EP3243492B1 (de) 2016-05-09 2016-05-09 Rollstuhl zur einnahme einer aufrechten position mit rückwärtig vertikalisierendem und abwärts gerichtetem bewegungsverlauf der fussstütze

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000023869A1 (it) 2020-10-12 2022-04-12 Comfort Online S R L Stabilizzatore statico-dinamico

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112545351B (zh) * 2020-12-03 2021-12-21 重庆理工大学 一种助老如厕装置
CN117815005A (zh) * 2024-03-04 2024-04-05 长春大学 一种辅助站立康复轮椅

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU430169B2 (en) * 1968-10-11 1972-11-15 Hodge Investments Proprietary Limited' Invalid chair
CH608186A5 (de) 1976-01-30 1978-12-29 Valutec Ag
FR2529456B1 (fr) * 1982-06-30 1985-07-12 Fralch Dispositif elevateur pour fauteuil roulant et fauteuil roulant en faisant application
FR2717377B1 (fr) 1994-03-18 1996-06-21 Idc Isolateur Denominateur Dispositif-élévateur pour fauteuil roulant verticalisateur et fauteuil roulant en faisant application.
DE102007044832A1 (de) * 2007-09-18 2009-04-02 Otto Bock Healthcare Ip Gmbh & Co. Kg Aufrichtrollstuhl

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000023869A1 (it) 2020-10-12 2022-04-12 Comfort Online S R L Stabilizzatore statico-dinamico
WO2022079745A1 (en) 2020-10-12 2022-04-21 Algoon Di Bertuzzi Ing. Luca Static-dynamic stabiliser

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