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EP3831353B1 - Ensemble de dossier et fauteuil roulant associé - Google Patents

Ensemble de dossier et fauteuil roulant associé Download PDF

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Publication number
EP3831353B1
EP3831353B1 EP19213638.0A EP19213638A EP3831353B1 EP 3831353 B1 EP3831353 B1 EP 3831353B1 EP 19213638 A EP19213638 A EP 19213638A EP 3831353 B1 EP3831353 B1 EP 3831353B1
Authority
EP
European Patent Office
Prior art keywords
handle
backrest
cable
cable guide
backrest assembly
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
EP19213638.0A
Other languages
German (de)
English (en)
Other versions
EP3831353A1 (fr
Inventor
Michael Knopf
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.)
Sunrise Medical GmbH and Co KG
Original Assignee
Sunrise Medical GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunrise Medical GmbH and Co KG filed Critical Sunrise Medical GmbH and Co KG
Priority to EP19213638.0A priority Critical patent/EP3831353B1/fr
Publication of EP3831353A1 publication Critical patent/EP3831353A1/fr
Application granted granted Critical
Publication of EP3831353B1 publication Critical patent/EP3831353B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1067—Arrangements for adjusting the seat adjusting the backrest relative to the seat portion

Definitions

  • the present invention relates to a chair seat backrest assembly according to the preamble of claim 1 as described in EP 3 578 151 A1 , not being pre-published, and a wheelchair with such a backrest assembly.
  • a chair typically comprises a frame that supports a seat having a seating surface and a backrest, and a plurality of legs.
  • a wheelchair is a type of chair for allowing the locomotion of a person while this person uses the chair.
  • the legs of the chair are typically configured as wheels, with a standard type comprising four wheels, wherein two wheels are typically configured as drive wheels.
  • a chair, in particular a wheelchair often incorporates folding functions that allow the overall size of the chair frame to be reduced in order to store or transport the unoccupied chair.
  • US 7,100,988 B1 refers to a child's highchair for receiving a child in a seated orientation.
  • Said chair includes a supporting frame, a seat supported by the frame, and a back connected to the frame wherein the back is movable between a substantially vertical orientation and a rearwardly tilted or reclining orientation.
  • a release mechanism is integrated into the highchair and includes a release handle, a pair of cable arrangements and securing pins that are movable between a locked position and a released position by manipulation of the release mechanism. With the securing pins in a locked position, the back is fixed in position in a substantially vertical orientation. With the securing pins retracted, the back is able to be moved manually to a reclining position so as to enlarge the included angle between the back and the seat, making it easier to place a child in the highchair.
  • FR 2 845 893 A1 refers to a wheelchair comprising a chassis resting on wheels and a backrest pivotally mounted on the chassis, with the backrest comprising two lateral tubular elements, two handles each provided at an upper end part of said lateral tubular elements, two supports, with the lower end part of each of said lateral tubular elements being pivotally mounted on an axis bearing on the supports, and two locking means provided for immobilizing the lower end portions of said lateral tubular elements relative to the respective supports in several positions.
  • the usage of two handles for two control members for moving the two locking means requires the usage of two hands for changing the position of the backrest which renders the wheelchair manipulation complicated.
  • EP 1 319 381 A2 describes a mobile chair for invalid transport comprising a chassis on which a seat, a backrest and armrests as seat portions are mounted movably relative to each other.
  • a displacement device with which at least one of the seat portions is displaceable, can be fixed in a respectively desired position by means of a latching device; and a handle, which is fixed to the backrest, is provided with an actuating device, the movement of which can be transmitted to the displacement device by way of a cable transmission.
  • the actuating device has a rotary portion which is arranged rotatably about the longitudinal axis of the handle and a rotary movement of which can be transmitted to the displacement device by way of Bowden cable wherein a pulling cable of the Bowden cable is fixedly connected to the rotary portion.
  • the drawback is that a rotation of the rotary portion in one direction of rotation leads to a movement of a latching device into an unlocked, released position, and a rotation in the opposite direction is required to move the latching device back into the locking or latched position. Thus, two rotations are necessary in opposite directions.
  • Pre-known backrest assemblies have the difficulty that some users cannot carry out an unlocking and folding of the backrest, even in case of a single-handed operation making usage of a pull cable.
  • tension on the pull cables has to be maintained in order to avoid play.
  • At least an actuator in particular comprising a battery, a motor, an electric actuator, preferably an electric motor, a hydraulic actuator, preferably a hydraulic motor, a pneumatic actuator, preferably a pneumatic motor, a thermal actuator, a shape memory alloy, preferably a thermal and/or magnetic shape memory alloy, a mechanical actuator and/or a valve for actuating and/or controlling the movement of the backrest and/or the additional device.
  • the accessibility of the handle for unlocking depends on the installation height and can be adapted to the individual needs.
  • the handle has a hand friendly contour by being non-circular in cross-section, in particular being oval in cross-section.
  • This oval character can be achieved e.g. by adding a label to the handle with the additional benefit that the label can be used to transport messages like an advertising message or a personalizes message selected by the user of the chair.
  • the hand-friendly oval contour of the handle results in sufficient installation space inside the handle for guiding and attaching the cables and additional means like stop members and the like.
  • the connection from the handle to an unlocking part is achieved by the cables, which are preferably in form of steel cables and can be deflected inside the handle by 90° via cable guides. For determining the direction of rotation and avoiding a backlash screws acting as clamping nipples and stop members are used.
  • inventions provide at least two second joints which allow the movement of the backrest tubes between the second end position and a third end position along a second direction, wherein preferably the first and second direction are substantially different.
  • Each first and/or second joint can be configured to be adjustable, in particular to adjust the first, second and/or third end position(s), with each joint preferably comprising a plurality of connecting means, preferably in form of holes for at least one transverse screw, and/or stop means.
  • Each locking means can comprise a wedge and/or can provide an, in particular inclined, guiding plane, with preferably at last one transverse screw being guided along the guiding plane during locking and/or unlocking of the locking means.
  • a trigger and a locking device can be provided, in particular comprising the elastic means, for locking and/or unlocking the handle.
  • the trigger can be designed as or can comprise at least one of a hull, a lever, a knob, a button, a latch, a strap, a clamp, a key, a switch and/or a sensor, preferably a force sensor, a tactile sensor, an optical sensor, a sound sensor and/or a fingerprint sensor, and/or is engineered to be effected by at least partly sliding, rotating, squeezing, pushing, pulling and/or touching.
  • the handle can comprise a sensor, preferably a force sensor, a tactile sensor, an optical sensor, a sound sensor and/or a fingerprint sensor.
  • the handle backrest tube(s) and/or the handle can comprise an indicator device in addition to the label or in form of the label, for conveying information to the user, wherein preferably the indicator device comprises a display device with at least one light source for emitting light, in particular a LCD, a sound device with at least one loudspeaker for emitting sound, and/or a tactile device for generating a tactile perception.
  • the indicator device comprises a display device with at least one light source for emitting light, in particular a LCD, a sound device with at least one loudspeaker for emitting sound, and/or a tactile device for generating a tactile perception.
  • the invention also provides a wheelchair comprising a backrest assembly according to the invention.
  • FIG. 1 provides an exploded view of a backrest assembly 1 of an embodiment of the invention, with figure 2 providing another exploded view to better show a twist lock 1.1 of the backrest assembly 1.
  • Said twist lock 1.1 comprises a connecting rod 1.2 connected at opposite ends with backrest tubes 1.13 as well as cable guides each having a cable guide top 1.6 and a cable guide bottom 1.7.
  • the connecting rod 1.2 has attachment holes 1.21 to be aligned with attachment holes 1.22 of the backrest tubes 1.13 and respective holes extending through the cable guides such that one screw 1.8 can be passed through all three elements, along a screw connection path 1.81 shown in figure 4b , at each end of the connecting rod 1.2.
  • the cable guides guide pull cables 1.3, with one pull cable 1.2 coming from the left backrest tube 1.13 and the other pull cable 1.3 from the right backrest tube 1.13, and each pull cable 1.3 being held under tension with the help of a cable clamp 1.4 via a set screw 1.5.
  • the cable clamps 4 are mounted within the twist lock 1.1 between a center handle top 1.9 and a center handle bottom 1.10, at fixed locations, see figure 3 .
  • the connecting rod 1.2 attached between the two cable guides 1.6, 1.7, which guide the two pull cables 1.3 to the two cable clamps 1.4, is housed between the center handle top 1.9 and the center handle bottom 1.10, which are attached to each other via cap screws 1.12.
  • a label 1.11 can be attached to the two handle halves 1.9, 1.10 for conveying information for example by carrying an advertisement print, a display device with at least one light source for emitting light, in particular a LCD, a sound device with at least one loudspeaker for emitting sound, and/or a tactile device for generating a tactile perception.
  • the backrest assembly 1 comprises said two transverse backrest tubes 1.13 connected to the twist lock 1.1 and each one of the two transverse backrest tubes 1.13 guides one pull cable 1.3 from the twist lock 1.1 into a backrest tube 1.14.
  • the backrest tubes 1.14 are substantially perpendicular to the backrest tubes 1.13 and can be tilted relative to seat frame tubes 1.15, for example from a substantially vertical first position as shown in figure 1 into an inclined second position, via joints comprising a back bracket 4.1 on each side the backrest assembly 1. For enabling such a tilting, or rather a folding and un-folding of the backrest assembly 1 relative to the seat frame tubes 1.15, each pull cable 1.3.
  • a locking means comprising a back latch 2.3, with a spring 2.2 and a spring stop 2.1 being arranged between the back latch 2.3 and a transverse screw 5.3 carrying rivets 6.2 and secured via a nut 6.3 to the respective backrest tube 1.14.
  • the transverse screw 5.3, 6.1 not only serves as abutment member for the spring stop 2.1, but also for attachment of the respective back bracket 4.1 such that the backrest tube 1.14 extends into the respective back bracket 4.1 between the two rivets 6.2 and the back latch 2.3 can telescope out of the backrest tube 1.14.
  • Each back bracket 4.1 is not only attached to one backrest tube 1.14 but also to one seat frame tube 1.15 via cap screws 4.4 with caps 4.2, 4.3.
  • a further back lock plate 5.1 is not only attached to one backrest tube 1.14 but also to one seat frame tube 1.15 via cap screws 4.4 with caps 4.2, 4.3.
  • Each back latch 2.3 has an inclined surface due to is wedge shape at its free end which is locked by the transversely extending respective screw 4.5, 5.2 in an idle position of the twist lock 1.1 and can be unlocked by rotating the twist lock 1.1 forwards, i.e. into the plane of figure 1 and towards the backrest tubes 1.14 as well as the seat frame tubes 1.15, to slide along the respective screw 4.5, 5.2 against the force of the respective spring 2.2 being compressed against the spring stop 2.1.
  • each pull cable 1.3 is mounted under tension via the respective cable clamp 1.4.
  • each pull cable 1.3 passes its respective cable guide or rather is forced to run within a recess 1.71 provided by the cable guide bottom 1.7 and along a projection 1.6.1 provided by the cable guide top 1.6, see figures 4a to 4c .
  • rotating the twist lock 1.1 results in rotating the connecting rod 1.2 together with the two cable guides 1.6, 1.7 such that the pull cables 1.3 are redirected or rather deflected inside the handle 1.9, 1.10.
  • Figure 5a shows the twist lock 1.1 in its idle position with the stop screw 1.8 securing the two cable guide halves 1.6, 1.7 together within the backrest tube 1.13 and resting against a projection 1.101 provided on the inner wall of the handle bottom 1.10.
  • the stop screw 1.8 disengages from the projection 1.101 as shown in figure 5b , and as soon as said grip is released, the stop screw 1.8 will automatically be rotated back against the projection 1.101 defining the idle position.
  • twist lock 1.1 will always be in its idle position when the backrest assembly 1 is locked, either in the first or the second position, and can only be rotated in one direction for disengaging the stop screw 1.8 and the projection 1.101 as well as unlocking the back brackets 4.1 for allowing a change of position, either from the first position into the second position or vice versa.
  • the handle 1.9, 1.10 providing a grip of the twist lock 1.1, has a hand friendly contour by being non-circular in cross-section, in particular being oval in cross-section.
  • This oval character can be seen in figures 5a and 5b , with both the handle bottom 1.10 and the handle top 1.9 having an u-shaped, flattened cross-section. This shape is made even more ergonomically by the label 1.11 against which the palm of the hand can be applied for gripping the handle 1.9, 1.10.
  • twist lock handle of the invention is described with respect to unlocking and folding/un-folding a backrest assembly in particular of a wheelchair, but can also be used for moving other parts relative to each other.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (13)

  1. Ensemble de dossier (1) de siège de chaise, en particulier pour un fauteuil roulant, comprenant :
    un dossier pour supporter le dos d'une personne ;
    deux tubes de dossier creux (1.14) conçus pour relier le dossier à un siège de chaque côté du siège ;
    au moins deux joints (4.1) pour permettre un mouvement des tubes de dossier (1.14) entre au moins une première position finale et une deuxième position finale relativement au siège ;
    deux moyens de verrouillage (2.3) pour verrouiller et/ou déverrouiller les joints (4.1) ;
    caractérisé par
    au moins un tube de poignée creuse (1.13) portant une poignée (1.9, 1.10), laquelle est disposée au milieu entre les tubes de dossier (1.14) et est reliée mécaniquement aux moyens de verrouillage (2.3) via des câbles (1.3) passant essentiellement à l'intérieur des tubes creux (1.14, 1.13), les câbles (1.3) étant des câbles de torsion guidés à partir des deux tubes de dossier creux (1.14) via deux tubes de poignée (1.13) dans la poignée (1.9, 1.10) et étant reliés l'un à l'autre via une tige de connexion (1.2),
    la poignée (1.9, 1.10)
    • fournissant un verrou tournant (1.1) avec le verrou tournant (1.1) ayant une seule position au repos dans laquelle le moyen de verrouillage (2.3) est verrouillé et étant conçu pour déverrouiller le moyen de verrouillage (2.3) par rotation de la poignée (1.9, 1.10), et
    • étant conçue pour déplacer les tubes de dossier (1.14) via les joints (4.1) par poussée ou traction après le déverrouillage,
    la poignée (1.9, 1.10) étant conçue pour être pivotée par un utilisateur dans une seule direction pour déverrouiller le moyen de verrouillage (2.3) dans une quelconque des positions finales, et
    la poignée (1.9, 1.10) étant conçue pour se reverrouiller automatiquement après le déverrouillage du moyen de verrouillage (2.3) et libérant la prise de telle sorte que la rotation et la poussée ou la traction de la poignée (1.9, 1.10) peuvent être effectuées par la prise de la poignée (1.9, 1.10) par une main d'un utilisateur, sans libérer la prise respective de la poignée (10 ; 100),
    comprenant en outre
    un guide de câble (1.6, 1.7) pour chacun des deux câbles (1.3), les guides de câble (1.6, 1.7) étant disposés dans la poignée (1.9, 1.10) et attachés à la tige de connexion (1.2) entre les deux guides de câble, et chaque câble (1.3) étant relié à un moyen de verrouillage (2.3) via un élément élastique étant adapté pour être comprimé ou détendu dans une plage prédéterminée,
    chaque guide de câble (1.6, 1.7) fournissant une pente de déviation de câble, et chaque câble (1.3) étant redirigé ou dévié à l'intérieur de la poignée (1.9, 1.10) via son guide de câble respectif (1.6, 1.7) lors de la rotation de la poignée (1.9, 1.10) contre la force du ressort de l'élément élastique respectif pour déverrouiller le moyen de verrouillage (2.3) et retournant automatiquement dans son état au repos lors de la libération de la poignée (1.9, 1.10) du fait de la libération de la force du ressort de telle sorte que la poignée (1.9, 1.10) retourne automatiquement dans sa position au repos.
  2. Ensemble de dossier selon la revendication 1, caractérisé en ce que
    chaque câble (1.3) est monté sous tension via une pince de câble (1.4) par serrage d'au moins une vis de pression (1.5).
  3. Ensemble de dossier selon la revendication 1 ou 2, caractérisé en ce que
    chaque câble (1.3) est redirigé ou dévié à l'intérieur de la poignée (1.9, 1.10) jusqu'à 90° via son guide de câble respectif (1.6, 1.7) en cas de rotation de la poignée (1.9, 1.10) jusqu'à 30°.
  4. Ensemble de dossier selon l'une quelconque des revendications précédentes, caractérisé en ce que
    chaque guide de câble comprend un élément supérieur de guide de câble (1.6) et un élément inférieur de guide de câble (1.7), et chaque pente de déviation de câble étant fournie par une rainure de guide de câble (1.71) fournie par l'élément inférieur de guide de câble (1.7) et une saillie de guide de câble (1.61) fournie par l'élément supérieur de guide de câble (1.6).
  5. Ensemble de dossier selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la poignée comprend un élément supérieur de poignée (1.9) et un élément inférieur de poignée (1.10) et a une section transversale non circulaire sous la forme d'une section transversale aplatie ou ovale.
  6. Ensemble de dossier selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la poignée comprend une étiquette (1.11) pour afficher un message.
  7. Ensemble de dossier selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la poignée comprend au moins un élément d'arrêt (1.101) définissant la position au repos de la poignée.
  8. Ensemble de dossier selon l'une quelconque des revendications précédentes, caractérisé par des premiers moyens de liaison sous la forme de premières vis (1.8), reliant la tige de liaison (1.2) et les guides de câble (1.6, 1.7) aux tubes de poignée creux (1.13),
    • avec au moins une première vis (1.8) fixant une extrémité de la tige de liaison (1.2) à un guide de câble (1.6, 1.7) ainsi qu'à un tube de poignée creux (1.13) et au moins une autre première vis (1.8) fixant l'autre extrémité, opposée, de la tige de liaison (1.2) à l'autre guide de câble (1.6, 1.7) ainsi que l'autre tube de poignée creux (1.13), et
    • avec au moins une première vis (1.8) pénétrant dans le tube de poignée creux (1.13) et passant à travers l'élément inférieur de guide de câble (1.7), la tige de liaison (1.2) et l'élément supérieur de guide de câble (1.6) pour sortir du tube de poignée creux (1.13).
  9. Ensemble de dossier selon la revendication 8, caractérisé en ce que
    chaque première vis (1.8) fournit un élément d'arrêt coopérant avec un élément d'arrêt (1.101) de la poignée (1.9, 1.10) pour fixer la position au repos de la poignée (1.9, 1.10).
  10. Ensemble de dossier selon la revendication 8 ou 9, caractérisé par
    des deuxièmes moyens de liaison sous la forme d'au moins une deuxième vis (1.12), reliant l'élément inférieur de poignée (1.10) à l'élément supérieur de poignée (1.9),
    • avec deux deuxièmes vis (1.12) étant disposées au milieu de la poignée (1.9, 1.10) ou sur les deux côtés de la tige de liaison (1.2) ou dans une région avec diamètre réduit de la tige de liaison (1.2).
  11. Ensemble de dossier selon l'une quelconque des revendications précédentes, caractérisé en ce que
    la poignée (1.9, 1.10) ne peut être tournée que jusqu'à 30°, à partir de sa position au repos,
    et/ou
    la poignée (1.9, 1.10) ne peut être tournée que vers l'avant, à partir de sa position au repos.
  12. Ensemble de dossier selon l'une quelconque des revendications précédentes, caractérisé en ce que la poignée (1.9, 1.10) est conçue pour déplacer un dispositif additionnel, sous la forme d'une surface de siège du fauteuil, une structure de siège du fauteuil, au moins un pied, au moins un accoudoir ou au moins une roue du fauteuil.
  13. Fauteuil roulant comprenant un ensemble de dossier selon l'une quelconque des revendications précédentes.
EP19213638.0A 2019-12-04 2019-12-04 Ensemble de dossier et fauteuil roulant associé Active EP3831353B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19213638.0A EP3831353B1 (fr) 2019-12-04 2019-12-04 Ensemble de dossier et fauteuil roulant associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19213638.0A EP3831353B1 (fr) 2019-12-04 2019-12-04 Ensemble de dossier et fauteuil roulant associé

Publications (2)

Publication Number Publication Date
EP3831353A1 EP3831353A1 (fr) 2021-06-09
EP3831353B1 true EP3831353B1 (fr) 2022-04-27

Family

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2845893B1 (fr) * 2002-10-21 2005-02-04 Invacare Poirier Sa Fauteuil roulant comportant un dossier inclinable

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10161624C1 (de) * 2001-12-14 2002-11-28 Herbert Brustmann Fahrbarer Stuhl für den Krankentransport
US7100988B1 (en) 2004-06-03 2006-09-05 Hyslop William J Child's highchair with a reclining back
DE102018113346A1 (de) * 2018-06-05 2019-12-05 Sunrise Medical Gmbh Rückenlehne und Stuhl, insbesondere für einen Rollstuhl

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2845893B1 (fr) * 2002-10-21 2005-02-04 Invacare Poirier Sa Fauteuil roulant comportant un dossier inclinable

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