EP3463242B1 - Chair - Google Patents

Chair Download PDF

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Publication number
EP3463242B1
EP3463242B1 EP17706291.6A EP17706291A EP3463242B1 EP 3463242 B1 EP3463242 B1 EP 3463242B1 EP 17706291 A EP17706291 A EP 17706291A EP 3463242 B1 EP3463242 B1 EP 3463242B1
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EP
European Patent Office
Prior art keywords
seat
canvas
seating
rigid base
pivot
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
EP17706291.6A
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German (de)
French (fr)
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EP3463242A1 (en
Inventor
Philippe TIRARD
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Individual
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Individual
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Publication of EP3463242A1 publication Critical patent/EP3463242A1/en
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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
    • A61G5/14—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
    • A61G5/1043—Cushions specially adapted for wheelchairs
    • A61G5/1045—Cushions specially adapted for wheelchairs for 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
    • A61G5/10—Parts, details or accessories
    • A61G5/1091—Cushions, seats or abduction devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1059—Arrangements for adjusting the seat adjusting the height of the seat

Definitions

  • the present invention relates to a seat comprising a seat support and a backrest.
  • the term “seat” should be understood in its broadest definition, and encompasses chairs, armchairs, and more generally any piece of furniture provided with a seat and a back and adapted to receive a person in a seated position.
  • the seat of the present invention will find a preferred application in the form of a chair or a wheelchair provided with wheels and / or casters allowing easy movement.
  • the present invention will find preferred use with people having certain difficulties in passing from the seated position to the upright standing position.
  • Seats have already existed for a long time which make it easier to lift a person into a standing upright position. These seats can be provided with armrests on which the person can lean with his hands. Mention may also be made of seats whose seat is arranged in an elevated position in order to facilitate the passage into the vertical position. A particularly firm seat also makes it possible to promote the lifting of the person. These different seats of the prior art all the same require the seated person to provide a substantial effort to return to a standing upright position.
  • aid devices comprising a canvas (or straps) which can be stretched so as to take off from the seat which remains fixed.
  • the fabric which is rolled up will stretch between the front edge of the seat and the top of the backrest, defining a slope.
  • the canvas which stretches is nevertheless deformed mainly by the seat of the person who will be received in an enveloping manner.
  • Tensioning the fabric has the effect not only of raising the seat of the seated person vertically, but also of moving the seat of the seated person towards the front of the seat in order to position it as close as possible to the vertical of the seat. his feet.
  • the stretched canvas fulfills a double function: firstly to lift the person's seat vertically, and second to push the person's seat towards the front of the seat. These two movements combined make it possible to raise a person in an upright standing position.
  • the object of the present invention is to remedy the drawbacks of the prior art by proposing a seat which makes it possible to raise a seated person in an upright standing position without providing the slightest effort, or at least a minimum effort.
  • Another object of the present invention is to raise the seat of the seated person vertically, without urging the seat of the person forward in order to move his barycenter vertically with his feet resting on the ground.
  • Yet another object of the invention is to be able to implement the invention on any commercial headquarters.
  • the present invention proposes that the seat comprises an aid device for raising a person seated on the seat into a vertical position, this aid device comprising a seat resting on the seat support and a canvas which sits on the seat. 'extends over the seat and back, this web comprising a traction end fixed to the seat and an opposite winding end engaged with winding means disposed at the rear of the seat, so that a winding of the canvas by the winding means has the effect of stretching the canvas so as to detach it from the seat and the backrest, the seat being mounted to pivot about a pivot axis arranged at the bottom of the backrest , so that the canvas has the effect of lifting the seat by causing it to pivot about the pivot axis.
  • the seat By allowing the seat to pivot, its front edge moves upwards in an arc of a circle centered on the pivot axis. So the vertical upward movement of the seat of the seated person is amplified by the pivoting of the seat. Since the front edge of the seat moves substantially vertically at the start of the pivoting, the user's seat can be moved substantially vertically while being moved by the stretched canvas which pushes it towards the front edge of the seat. In other words, the combined upward and forward movement provided by the stretched canvas is amplified by the pivoting of the seat.
  • the seat comprises a rigid base defining a rear edge adjacent to the bottom of the backrest, an opposite front edge and two side edges, the pivot axis being disposed at the level of the rear edge of the rigid base, and a seat pad mounted on this rigid base, the traction end being attached to the rigid base near or at the front edge.
  • the rigid base is supported on the seat support formed by the seat frame.
  • the function of the seat upholstery is to guarantee a certain level of comfort for the seated person.
  • the frame forms the seat support and the backrest, and these two elements meet at the bottom of the backrest corresponding to the rear of the seat.
  • the seat pivot axis can be wedged at the bottom of the backrest which meets the rear of the seat support.
  • the seat upholstery comprises a rear part secured to the rigid base and a front part which is mounted to pivot about a tilting axis located at the front edge, the traction end of the canvas being attached to the front part and / or front edge passing under the front part, so that the canvas has the effect of rotating the rigid base around the pivot axis and the front part around the axis tipping.
  • the front part has an orientation which is different from the rear part, since it is urged to tilt by the stretched canvas. The person sitting on the seat will thus be moved forward by the stretched canvas so as to position his seat on the tilting front part.
  • the tilting front part Under the action of the stretched canvas, the tilting front part will take an orientation facing the front of the seat, while the fixed rear part will take an orientation facing the backrest of the seat. seat.
  • the person sitting on the tilting front part will therefore first be lifted substantially vertically due to the pivoting of the rigid base and be urged towards the front of the seat by the forward tilting of the front part. Since the front part is located, as its name suggests, at the front of the seat, the person is thus pushed at the level of his sitting forward and upwards so as to bring his sitting upright with his feet resting on the ground. Thanks to this tilting front part, the stretched canvas induces yet another movement which is added to that of the pivoting of the seat and that of the tension of the canvas.
  • the rear part forms over approximately two thirds of the surface of the seat and the front part forms approximately one third of the surface of the seat. Of course, other proportions can be envisaged for the front part and the rear part.
  • the backrest is provided with a return roller over which the fabric passes to be returned to the winding means.
  • This deflection roller can be removably installed on the top of the backrest, or else at the level of push handles in the case of a chair or a wheelchair. When the fabric is stretched, it extends substantially rectilinearly from the front edge of the seat to the return roller and from the return roller to the winding means.
  • the seat can further comprise wheels provided with a locking system and unique control means for activating the winding means and the locking system in concert. It is in fact important that the seat is perfectly fixed when the seated person decides to actuate the lifting aid device in the vertical position. This is why it is useful to couple the wheel locking system to the activation of the winding means of the assistance device.
  • the winding means comprise a winding drum driven in rotation by a motor housed inside the winding drum.
  • Winding means can be removably mounted on the seat frame, for example at the rear of the backrest or at the rear of the seat or below the seat at the level of the feet which are optionally fitted with wheels.
  • the pivot axis comprises two ends of the axis which bear on the frame of the seat at the level of the junction between the seat support and the backrest. It is thus extremely easy to set up the seat on a conventional seat.
  • the seat defines a seat frame forming the backrest and the seat support, in which the aid device, comprising the seat, the winding means, the canvas, and optionally a return roller, is removably mounted on the seat frame.
  • the aid device comprising the seat, the winding means, the canvas, and optionally a return roller.
  • the invention lies in the fact of using the tension of the canvas to rotate the seat, and even to tilt a front part of the seat.
  • the removable mounting of the deflection roller and the winding means on the frame of a seat are advantageous secondary features.
  • the correlation between the seat locking system and the activation of the winding means constitutes an interesting safety measure.
  • the main function of the aid device of the present invention is to lift a person seated on a seat to a vertical position, resting on both feet.
  • the purpose of the aid device of the invention is to be able to be installed or set up on any seat, including commercial seats.
  • this chair comprises a seat support S1, a backrest S2 and several legs S3 intended to rest on the ground. This is a very classic and conventional structure for a chair.
  • this chair also includes two wrists S22 which extend in the extension of the top of the backrest S2 with a substantially horizontal and parallel orientation.
  • the aid device comprises a seat 1 which is arranged on the seat support S1, winding means 3 which are arranged at the back of the chair, a canvas 2 which extends from the seat 1 to the winding means 3 and optionally a return roller 4 which is mounted at the top of the backrest S2, for example at the level of the wrists S22.
  • the seat A comprises a rigid base 11 which can be formed by a solid plate, possibly perforated, or by a frame made up of bars or rods assembled.
  • This rigid base 11 comprises a rear edge which is intended to be positioned at the level of the chair where the seat support S1 joins the backrest S2.
  • This rear edge is advantageously provided with two ends of axes 12a which point outwards in an opposite manner, but nevertheless aligned, so as to define a pivot axis 12 visible on the figure 1 .
  • the rigid base 11 also forms two parallel side edges and a front edge which forms a tilting axis 13.
  • the pivoting axis 12 and the tilting axis 13 thus extend parallel, respectively at the rear edges and front of the rigid base 11.
  • the seat 1 also comprises a seat upholstery which forms, in this preferred embodiment, a rear part 14 integral with the rigid base 11 and a front part 15 which is connected to the rigid base 11 by the tilting axis 13, so that this front part 15 can perform in motion in an arc of a circle relative to the rigid base 11 around the tilting axis 13. This is easily understandable from the view of the figure 6 .
  • the seat upholstery as a whole increases the comfort of the user by allowing a certain deformation.
  • the front part 15 comprises a rigid base 16, the front edge of which is connected to the tilting axis 13.
  • the rear part 14 occupies two thirds of the seat, while the front part 15 occupies one third of the seat. These proportions are not, however, limiting.
  • the rear 14 and front 15 parts could very well be formed with substantially identical dimensions.
  • the seat 1 of the figure 6 is arranged on the seat resting on the seat support S1, with the pivot axis 12 which is arranged at the angle formed by the rear of the seat support S1 and the bottom of the backrest S2.
  • the ends of axes 12a can very simply be housed in this angle and be supported both on the seat support S1 vertically and against the backrest S2 horizontally.
  • the seat 1 can thus be freely positioned on the chair without providing other means for securing it to the chair.
  • the seat 1 can be made integral with the chair, for example at its ends of axes 12a.
  • the rigid base 11 can be made integral with the seat support S1 in a reversible manner, to allow the seat 1 to pivot relative to the chair.
  • the winding means 3 are here removably mounted by means of a fixing bracket 31 to the rear legs S3 of the chair.
  • the winding means 3 are fixed at a distance from the seat support S1, but it would also be conceivable to have the winding means 3 with the fixing console 31 just below the seat support S1 at the top of the rear legs. S3. Without departing from the scope of the invention, it is also possible to mount the winding means 3 at the rear of the backrest S2.
  • the winding means comprise a winding drum which is driven in rotation by a motor which is advantageously housed inside the winding drum.
  • the winding means have a compact and discreet structure which does not harm the aesthetics of the chair.
  • the canvas 2 can be made of any material, provided that it is flexible and resistant to traction.
  • the fabric can be made with a fabric formed of warp and weft threads or with a flexible sheet.
  • the fabric 2 comprises a front traction end 21 which is fixed to the seat 1 and a rear winding end 23 which is opposite the traction end 21 and which is in engagement with the winding drum of the means of winding 3.
  • the fabric 2 can be wound on the drum winding of the winding means 3 so as to create a tension which will act on the seat 1, as will be seen below.
  • the traction end 21 can be fixed at the level of the front edge of the rigid base 11, close to the tilting axis 13.
  • the internal traction end can also be fixed to the rigid base 16 of the front part 15.
  • the fabric 2 covers the rear lining 14, passes between the two linings 14 and 15 and then extends under the front lining 15. Whatever the location where the traction end 21 is exactly fixed, it must cause the tilting of the front part 15 relative to the fixed base 11.
  • the canvas 2 also extends over the backrest S2 in the extension of the rear part 14 of the lining. Then, the canvas 2 passes over the return roller 4 which is detachably fixed by means of another fixing bracket 41 on the wrists S2 of the chair. From there, the canvas 2 is returned directly to the rear side of the chair to the winding means 3.
  • the canvas 2 is further stretched, so that it coats the forward tilting of the front part 15 of the seat around the tilting axis 13.
  • this tilting is less pronounced because the person's seat rests on the front part 15.
  • a slight detachment of the front part 15 may be noticeable during this phase.
  • the tension of the fabric 2 which has increased can place even more strain on the seat of the person seated towards and on the front part 15.
  • the traction end 21 of the canvas 2 is located under the front part 15.
  • the tension of the canvas 2 is further increased so as to cause the seat 1 to pivot around the pivot axis 12.
  • the rigid base 11 is detached from the seat support S1, except at the level of the pivot axis 12. Since the angle formed between the rigid base 11 and the seat support S1 is small, the movement of the front part 15 is substantially vertical with a very small horizontal component.
  • the front part 15 is always tilted forwards around the tilting axis 13.
  • the rear part 14 is now oriented towards the backrest S2, due to the pivoting of the seat 1.
  • the front part 15 and the rear part 14 have divergent orientations.
  • the assistance device is in its final lifting position. It can be seen that the seat 1 has become even more detached from the seat support S1, with the pivot axis 12 resting at the junction between the seat support S2 and the backrest S2.
  • the angle between the seat support S1 and the rigid base 11 is here of the order of 30 °, so that the front part 15 has mostly moved upwards and very little rearward.
  • the orientation of the front part 15 is always the same, that is to say towards the front while the rear part 14 has accentuated its orientation turned towards the backrest S2.
  • the angle between the front part 15 and the fixed base 11 has further increased, and is now of the order of 45 °.
  • the person sitting on the seat is almost in an upright standing position, since the front part 15 is now arranged at such a height from the ground that the user's legs are almost fully extended and his or her sitting only rests on the front edge of the front part 15.
  • the forward orientation of the front part 15 urges the person's seat forward so that it is positioned substantially vertically above the feet resting on the ground.
  • the standing position is reached or close to it.
  • the person has virtually no additional effort to achieve a standing upright position.
  • the seat 1 ' is fixed with respect to to the seat support S1. In other words, no movement or displacement is possible between the seat 1 'and the seat support S1.
  • the seat 1 ' can be an integral part of the chair.
  • the aid device of this simplified model still comprises a canvas 2, winding means 3 and a return roller 4 which may be similar or identical to those of the first embodiment.
  • the fabric 2 is fixed by its traction end 21 at the level of the front edge of the seat 1 ', while its winding end 23 is fixed to the winding means 3.
  • the traction end 21 can also be attached at the top of the S3 legs of the chair. It is then easily understood that putting the canvas 2 under tension has the effect of taking it off from the backrest S2 and from the seat 1 '. A person seated on this chair will thus be urged forwards upwards due to the inclined orientation of the canvas 2 between the seat 1 'and the return roller 4. The person sitting on this chair cannot be not be fully raised in a vertical position, as in the first preferred embodiment of the invention, but this simplified aid device still makes it possible to facilitate the lifting of the person in a vertical position, the person having to provide a certain effort to reach the vertical position.
  • FIG 8 we see a conventional wheelchair equipped with the preferential assistance device for figures 1 to 6 .
  • this wheelchair includes large S4 rear wheels and two small S5 front wheels.
  • Seat 1 may be the same or similar to that of figures 1 to 6 .
  • the return roller 4 is here removably attached to the upper end of the backrest S2.
  • the return roller 4 can include removable fixing pins which penetrate inside the ends of the tubes forming the frame of the backrest S2.
  • the winding means 3 can be identical or similar to those of the first preferred embodiment of the figures 1 to 6 . They include a winding drum 30 around which the fabric 2 is wound by the action of a motor 32 which is housed inside the winding drum 30. winding means 3 are fixed to the means of removable fixing brackets 31 to a bar constituting the frame of the wheelchair.
  • FIGS 9 to 11 show another wheelchair equipped with the same or similar assistive device as the figures 1 to 6 .
  • This wheelchair also includes large S4 rear wheels and small S5 front wheels. It also includes S6 armrests and an S7 locking system which acts here on the large S4 rear wheels to lock them in rotation.
  • the aid device further comprises control means 5 arranged at an armrest S6.
  • the control means 5 can for example be mounted on a flexible tube 51 allowing easy spatial positioning.
  • the control means 5 are connected by a cable 52 to the winding means 3, as well as by other cables 52 to the locking system S7.
  • the assistive device is in the rest position on the figures 9 and 10 , while it is in the final lift position on the figure 11 .
  • the tilting front part 15 can be covered with a non-slip material to promote the attachment of the seat of the person.
  • the assisting device of the present invention By virtue of the assisting device of the present invention, a person can be called upon, or even perfectly brought back, into an upright position raised from a seated position.
  • An interesting aspect of the invention lies in the fact that this aid device is completely removable, so that it can be adapted to any type of seat.

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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)
  • Chairs Characterized By Structure (AREA)

Description

La présente invention concerne un siège comprenant un support d'assise et un dossier. Le terme « siège » doit être compris dans sa définition la plus large, et englobe les chaises, les fauteuils, et plus généralement tout meuble doté d'une assise et d'un dossier et adapté à recevoir une personne en position assise. Le siège de la présente invention trouvera une application privilégiée sous la forme de chaise ou de fauteuil roulant doté de roues et/ou de roulettes permettant un déplacement aisé. La présente invention trouvera une utilisation privilégiée auprès de personnes éprouvant une certaines difficultés à passer de la position assise à la position verticale debout.The present invention relates to a seat comprising a seat support and a backrest. The term “seat” should be understood in its broadest definition, and encompasses chairs, armchairs, and more generally any piece of furniture provided with a seat and a back and adapted to receive a person in a seated position. The seat of the present invention will find a preferred application in the form of a chair or a wheelchair provided with wheels and / or casters allowing easy movement. The present invention will find preferred use with people having certain difficulties in passing from the seated position to the upright standing position.

Il existe déjà depuis longtemps des sièges permettant de faciliter le relevage d'une personne en position verticale debout. Ces sièges peuvent être pourvus d'accoudoirs sur lesquels la personne peut prendre appui avec ses mains. On peut également citer des sièges dont l'assise est disposée à une position élevée afin de faciliter le passage en position verticale. Une assise particulièrement ferme permet également de favoriser le relevage de la personne. Ces différents sièges de l'art antérieur demandent tout de même à la personne assise de fournir un effort conséquent pour se remettre en position verticale debout.Seats have already existed for a long time which make it easier to lift a person into a standing upright position. These seats can be provided with armrests on which the person can lean with his hands. Mention may also be made of seats whose seat is arranged in an elevated position in order to facilitate the passage into the vertical position. A particularly firm seat also makes it possible to promote the lifting of the person. These different seats of the prior art all the same require the seated person to provide a substantial effort to return to a standing upright position.

Les documents WO2015/071616 , JP2001/170113 , JP2002/209947 , US2012/025572 et US5039165 décrivent tous des dispositifs d'aide comprenant une toile (ou des sangles) que l'on peut tendre de manière à décoller de l'assise qui reste fixe. La toile qui s'enroule va se tendre entre le bord avant de l'assise et le haut du dossier en définissant une pente. Lorsqu'une personne est assise sur ce siège, la toile qui se tend est néanmoins déformée principalement par le séant de la personne qui va être reçu de manière enveloppante. La mise sous tension de la toile a pour effet non seulement de relever verticalement le séant de la personne assise, mais également de déplacer le séant de la personne assise vers l'avant du siège afin de le positionner le plus près possible à la verticale de ses pieds. Ainsi, la toile tendue remplit une double fonction : premièrement de soulever verticalement le séant de la personne, et deuxièmement de pousser le séant de la personne vers l'avant du siège. Ces deux déplacements combinés permettent de relever une personne en position verticale debout.The documents WO2015 / 071616 , JP2001 / 170113 , JP2002 / 209947 , US2012 / 025572 and US5039165 all describe aid devices comprising a canvas (or straps) which can be stretched so as to take off from the seat which remains fixed. The fabric which is rolled up will stretch between the front edge of the seat and the top of the backrest, defining a slope. When a person is seated on this seat, the canvas which stretches is nevertheless deformed mainly by the seat of the person who will be received in an enveloping manner. Tensioning the fabric has the effect not only of raising the seat of the seated person vertically, but also of moving the seat of the seated person towards the front of the seat in order to position it as close as possible to the vertical of the seat. his feet. Thus, the stretched canvas fulfills a double function: firstly to lift the person's seat vertically, and second to push the person's seat towards the front of the seat. These two movements combined make it possible to raise a person in an upright standing position.

Cependant, l'inconvénient de ces dispositifs d'aide est que la personne a tendance à glisser sur la toile tendue et peut finir par tomber à terre, particulièrement si la personne n'est suffisamment forte dans ses jambes. Ceci provient du fait que la toile génère une composante horizontale de poussée, qui conduit la toile à se comporter comme un toboggan sur lequel la personne peut glisser. Il est donc nécessaire que la personne prenne appui sur ses jambes pour éviter de glisser de la toile tendue.However, the downside of these assistive devices is that the person has a tendency to slip on the stretched canvas and may eventually fall to the ground, especially if the person is not strong enough in their legs. This comes from the fact that the canvas generates a horizontal component of thrust, which causes the canvas to behave like a slide on which the person can slide. It is therefore necessary for the person to rest on his legs to avoid slipping from the stretched canvas.

La présente invention a pour but de remédier aux inconvénients de l'art antérieur en proposant un siège qui permet de relever une personne assise en position verticale debout sans fournir le moindre effort, ou tout du moins un effort minimum. Un autre but de la présente invention est de relever verticalement le séant de la personne assise, sans solliciter le séant de la personne vers l'avant afin de déplacer son barycentre à la verticale de ses pieds reposant au sol. Encore un autre but de l'invention est de pouvoir mettre en œuvre l'invention sur n'importe quel siège du commerce.The object of the present invention is to remedy the drawbacks of the prior art by proposing a seat which makes it possible to raise a seated person in an upright standing position without providing the slightest effort, or at least a minimum effort. Another object of the present invention is to raise the seat of the seated person vertically, without urging the seat of the person forward in order to move his barycenter vertically with his feet resting on the ground. Yet another object of the invention is to be able to implement the invention on any commercial headquarters.

Pour atteindre ces buts, la présente invention propose que le siège comprenne un dispositif d'aide pour relever en position verticale une personne assise sur le siège, ce dispositif d'aide comprenant une assise reposant sur le support d'assise et une toile qui s'étend sur l'assise et le dossier, cette toile comprenant une extrémité de traction fixée à l'assise et une extrémité opposée d'enroulement en prise avec des moyens d'enroulement disposés à l'arrière du siège, de sorte qu'un enroulement de la toile par les moyens d'enroulement a pour effet de tendre la toile de manière à la décoller de l'assise et du dossier, l'assise étant montée pivotante autour d'un axe de pivotement disposé au niveau du bas du dossier, de sorte que la toile a pour effet de soulever l'assise en la faisant pivoter autour de l'axe de pivotement.To achieve these aims, the present invention proposes that the seat comprises an aid device for raising a person seated on the seat into a vertical position, this aid device comprising a seat resting on the seat support and a canvas which sits on the seat. 'extends over the seat and back, this web comprising a traction end fixed to the seat and an opposite winding end engaged with winding means disposed at the rear of the seat, so that a winding of the canvas by the winding means has the effect of stretching the canvas so as to detach it from the seat and the backrest, the seat being mounted to pivot about a pivot axis arranged at the bottom of the backrest , so that the canvas has the effect of lifting the seat by causing it to pivot about the pivot axis.

En permettant à l'assise de pivoter, son bord avant se déplace vers le haut en décrivant un arc de cercle centré sur l'axe de pivotement. Ainsi, le déplacement vertical vers le haut du séant de la personne assise est amplifié par le pivotement de l'assise. Etant donné que le bord avant de l'assise se déplace sensiblement verticalement en début de pivotement, le séant de l'utilisateur peut être déplacé sensiblement verticalement tout en étant déplacé par la toile tendue qui le pousse vers le bord avant de l'assise. En d'autres termes, le déplacement combiné vers le haut et vers l'avant fournit par la toile tendue est amplifié par le pivotement de l'assise.By allowing the seat to pivot, its front edge moves upwards in an arc of a circle centered on the pivot axis. So the vertical upward movement of the seat of the seated person is amplified by the pivoting of the seat. Since the front edge of the seat moves substantially vertically at the start of the pivoting, the user's seat can be moved substantially vertically while being moved by the stretched canvas which pushes it towards the front edge of the seat. In other words, the combined upward and forward movement provided by the stretched canvas is amplified by the pivoting of the seat.

Selon une forme de réalisation pratique, l'assise comprend une base rigide définissant un bord arrière adjacent au bas du dossier, un bord avant opposé et deux bords latéraux, l'axe de pivotement étant disposé au niveau du bord arrière de la base rigide, et une garniture d'assise montée sur cette base rigide, l'extrémité de traction étant fixée à la base rigide à proximité ou au niveau du bord avant. La base rigide prend appui sur le support d'assise formé par le cadre du siège. La garniture d'assise a pour fonction de garantir un certain confort pour la personne assise. Sur un siège classique, le cadre forme le support d'assise et le dossier, et ces deux éléments se rejoignent au niveau du bas du dossier correspondant à l'arrière de l'assise. L'axe de pivotement de l'assise peut être calé au niveau du bas du dossier qui rencontre l'arrière du support d'assise.According to a practical embodiment, the seat comprises a rigid base defining a rear edge adjacent to the bottom of the backrest, an opposite front edge and two side edges, the pivot axis being disposed at the level of the rear edge of the rigid base, and a seat pad mounted on this rigid base, the traction end being attached to the rigid base near or at the front edge. The rigid base is supported on the seat support formed by the seat frame. The function of the seat upholstery is to guarantee a certain level of comfort for the seated person. On a conventional seat, the frame forms the seat support and the backrest, and these two elements meet at the bottom of the backrest corresponding to the rear of the seat. The seat pivot axis can be wedged at the bottom of the backrest which meets the rear of the seat support.

Selon une forme de réalisation préférée, la garniture d'assise comprend une partie arrière solidaire de la base rigide et une partie avant qui est montée pivotante autour d'un axe de basculement situé au niveau du bord avant, l'extrémité de traction de la toile étant fixée à la partie avant et/ou au bord avant en passant sous la partie avant, de sorte que la toile a pour effet de faire pivoter la base rigide autour de l'axe de pivotement et la partie avant autour de l'axe de basculement. Ainsi, la partie avant présente une orientation qui est différente de la partie arrière, puisqu'elle est sollicitée en basculement par la toile tendue. La personne assise sur le siège va ainsi être déplacée vers l'avant par la toile tendue de manière à positionner son séant sur la partie avant basculante. Sous l'action de la toile tendue, la partie avant basculante va prendre une orientation tournée vers l'avant du siège, alors que la partie arrière fixe va prendre une orientation tournée vers le dossier du siège. La personne assise sur la partie avant basculante va donc d'abord être soulevé sensiblement verticalement du fait du pivotement de la base rigide et être sollicité vers l'avant du siège par le basculement vers l'avant de la partie avant. Etant donné que la partie avant est située, comme son nom l'indique, au niveau de l'avant de l'assise, la personne est ainsi poussée au niveau de son séant vers l'avant et vers le haut de manière à amener son séant à la verticale de ses pieds reposant au sol. Grâce à cette partie avant basculante, la toile tendue induit encore un autre mouvement qui s'ajoute à celui du pivotement de l'assise et à celui de la tension de la toile. Selon une forme de réalisation pratique, la partie arrière forme sur environ deux tiers de la superficie de l'assise et la partie avant forme environ un tiers de la superficie de l'assise. Bien entendu, d'autres proportions sont envisageables pour la partie avant et la partie arrière.According to a preferred embodiment, the seat upholstery comprises a rear part secured to the rigid base and a front part which is mounted to pivot about a tilting axis located at the front edge, the traction end of the canvas being attached to the front part and / or front edge passing under the front part, so that the canvas has the effect of rotating the rigid base around the pivot axis and the front part around the axis tipping. Thus, the front part has an orientation which is different from the rear part, since it is urged to tilt by the stretched canvas. The person sitting on the seat will thus be moved forward by the stretched canvas so as to position his seat on the tilting front part. Under the action of the stretched canvas, the tilting front part will take an orientation facing the front of the seat, while the fixed rear part will take an orientation facing the backrest of the seat. seat. The person sitting on the tilting front part will therefore first be lifted substantially vertically due to the pivoting of the rigid base and be urged towards the front of the seat by the forward tilting of the front part. Since the front part is located, as its name suggests, at the front of the seat, the person is thus pushed at the level of his sitting forward and upwards so as to bring his sitting upright with his feet resting on the ground. Thanks to this tilting front part, the stretched canvas induces yet another movement which is added to that of the pivoting of the seat and that of the tension of the canvas. According to a practical embodiment, the rear part forms over approximately two thirds of the surface of the seat and the front part forms approximately one third of the surface of the seat. Of course, other proportions can be envisaged for the front part and the rear part.

Selon une autre caractéristique intéressante de l'invention, le dossier est pourvu d'un rouleau de renvoi sur lequel la toile passe pour être renvoyée vers les moyens d'enroulement. Ce rouleau de renvoi peut être installé de manière amovible sur le haut du dossier, ou encore au niveau de poignées de poussée dans le cas d'une chaise ou d'un fauteuil roulant. Lorsque la toile est tendue, elle s'étend sensiblement de manière rectiligne du bord avant de l'assise jusqu'au rouleau de renvoi et du rouleau de renvoi vers les moyens d'enroulement.According to another advantageous characteristic of the invention, the backrest is provided with a return roller over which the fabric passes to be returned to the winding means. This deflection roller can be removably installed on the top of the backrest, or else at the level of push handles in the case of a chair or a wheelchair. When the fabric is stretched, it extends substantially rectilinearly from the front edge of the seat to the return roller and from the return roller to the winding means.

Selon un autre aspect intéressant de l'invention, le siège peut en outre comprendre des roues munies d'un système de blocage et des moyens de commande uniques pour activer de concert les moyens d'enroulement et le système de blocage. Il est en effet important que le siège soit parfaitement fixe lorsque la personne assise décide d'actionner le dispositif d'aide au relevage en position verticale. C'est pourquoi il est utile de coupler le système de blocage des roues à l'activation des moyens d'enroulement du dispositif d'aide.According to another advantageous aspect of the invention, the seat can further comprise wheels provided with a locking system and unique control means for activating the winding means and the locking system in concert. It is in fact important that the seat is perfectly fixed when the seated person decides to actuate the lifting aid device in the vertical position. This is why it is useful to couple the wheel locking system to the activation of the winding means of the assistance device.

Selon une forme de réalisation pratique, les moyens d'enroulement comprennent un tambour d'enroulement entraîné en rotation par un moteur logé à l'intérieur du tambour d'enroulement. Les moyens d'enroulement peuvent être montés de manière amovible sur le cadre du siège, par exemple à l'arrière du dossier ou encore à l'arrière de l'assise ou en dessous de l'assise au niveau des pieds qui sont optionnellement munis de roues.According to a practical embodiment, the winding means comprise a winding drum driven in rotation by a motor housed inside the winding drum. Winding means can be removably mounted on the seat frame, for example at the rear of the backrest or at the rear of the seat or below the seat at the level of the feet which are optionally fitted with wheels.

Selon un mode de réalisation pratique, l'axe de pivotement comprend deux bouts d'axe qui prennent appui sur le cadre du siège au niveau de la jonction entre le support d'assise et le dossier. Il est ainsi extrêmement aisé de mettre en place l'assise sur un siège conventionnel.According to a practical embodiment, the pivot axis comprises two ends of the axis which bear on the frame of the seat at the level of the junction between the seat support and the backrest. It is thus extremely easy to set up the seat on a conventional seat.

Selon une autre caractéristique de l'invention, le siège définit un cadre de siège formant le dossier et le support d'assise, dans lequel le dispositif d'aide, comprenant l'assise, les moyens d'enroulement, la toile, et optionnellement un rouleau de renvoi, est monté de manière amovible sur le cadre de siège. Il est en effet intéressant de pouvoir adapter le dispositif d'aide de la présente invention sur n'importe quel siège du commerce, et ceci de manière amovible. Il suffit pour cela de mettre en place l'assise sur le support d'assise du siège, de monter le rouleau de renvoi au niveau du haut du dossier et de monter les moyens d'enroulement derrière le siège.According to another characteristic of the invention, the seat defines a seat frame forming the backrest and the seat support, in which the aid device, comprising the seat, the winding means, the canvas, and optionally a return roller, is removably mounted on the seat frame. It is in fact advantageous to be able to adapt the aid device of the present invention to any commercial seat, and this in a removable manner. To do this, it suffices to place the seat on the seat base support, to mount the return roller at the top of the backrest and to mount the winding means behind the seat.

L'invention réside dans le fait d'utiliser la tension de la toile pour faire pivoter l'assise, et même faire basculer une partie avant de l'assise. Le montage amovible du rouleau de renvoi et des moyens d'enroulement sur le cadre d'un siège sont des caractéristiques secondaires avantageuses. La corrélation entre le système de blocage du siège et l'activation des moyens d'enroulement constituent une mesure de sécurité intéressante.The invention lies in the fact of using the tension of the canvas to rotate the seat, and even to tilt a front part of the seat. The removable mounting of the deflection roller and the winding means on the frame of a seat are advantageous secondary features. The correlation between the seat locking system and the activation of the winding means constitutes an interesting safety measure.

L'invention sera maintenant décrite plus en détail en référence aux dessins joints, donnant à titre d'exemple non limitatif, plusieurs modes de réalisation de l'invention.The invention will now be described in more detail with reference to the accompanying drawings, giving, by way of non-limiting example, several embodiments of the invention.

Sur les figures :

  • La figure 1 est une vue en coupe transversale verticale schématique à travers une chaise équipée d'un dispositif d'aide au relevage en position verticale de l'invention, dans une configuration inactivée dans laquelle une personne peut rester tranquillement assise sur la chaise,
  • Les figures 2, 3 et 4 sont des vues similaires à celle de la figure 1 dans des configurations intermédiaires successives de la toile du dispositif d'aide pour relever une personne en position verticale,
  • La figure 5 est une vue similaire aux figures précédentes montrant la chaise avec le dispositif d'aide dans la configuration finale de relevage en position verticale,
  • La figure 6 est une vue en perspective de l'assise mise en œuvre dans la chaise des figures 1 à 5,
  • La figure 7 est une vue en coupe transversale verticale schématique à travers une chaise équipée d'un dispositif d'aide au relevage en position verticale selon un autre mode de réalisation plus simple,
  • La figure 8 est une vue en coupe transversale verticale à travers un fauteuil roulant équipé du dispositif d'aide des figures 1 à 6, et
  • Les figures 9 à 11 sont des vues schématiques en perspective plus détaillées d'un autre fauteuil roulant équipé d'un dispositif d'aide fonctionnant sur le même principe que celui des figures 1 à 6.
In the figures:
  • The figure 1 is a schematic vertical cross-sectional view through a chair equipped with a vertical lifting aid device of the invention, in an inactivated configuration in which a person can sit quietly on the chair,
  • The figures 2, 3 and 4 are views similar to that of the figure 1 in successive intermediate configurations of the canvas of the aid device for raising a person in a vertical position,
  • The figure 5 is a view similar to the previous figures showing the chair with the aid device in the final lifting configuration in a vertical position,
  • The figure 6 is a perspective view of the seat implemented in the chair of figures 1 to 5 ,
  • The figure 7 is a schematic vertical cross-sectional view through a chair equipped with a device to aid lifting in a vertical position according to another simpler embodiment,
  • The figure 8 is a vertical cross-sectional view through a wheelchair equipped with the figures 1 to 6 , and
  • The figures 9 to 11 are more detailed schematic perspective views of another wheelchair equipped with an assistive device operating on the same principle as that of the figures 1 to 6 .

Le dispositif d'aide de la présente invention a pour fonction principal de relever en position verticale, en appui sur ses deux pieds, une personne assise sur un siège. Le dispositif d'aide de l'invention a pour vocation à pouvoir être installé ou mis en place sur n'importe quel siège, y compris les sièges du commerce.The main function of the aid device of the present invention is to lift a person seated on a seat to a vertical position, resting on both feet. The purpose of the aid device of the invention is to be able to be installed or set up on any seat, including commercial seats.

On se référera tout d'abord à la figure 1 pour décrire la structure d'un dispositif d'aide selon un mode de réalisation préféré, mis en œuvre sur une chaise. De manière tout à fait conventionnelle, cette chaise comprend un support d'assise S1, un dossier S2 et plusieurs pieds S3 destinés à reposer au sol. Il s'agit là d'une structure tout à fait classique et conventionnelle pour une chaise. Optionnellement, cette chaise comprend également deux poignets S22 qui s'étendent dans le prolongement du haut du dossier S2 avec une orientation sensiblement horizontale et parallèle.We will first refer to the figure 1 to describe the structure of an aid device according to a preferred embodiment, implemented on a chair. In a completely conventional manner, this chair comprises a seat support S1, a backrest S2 and several legs S3 intended to rest on the ground. This is a very classic and conventional structure for a chair. Optionally, this chair also includes two wrists S22 which extend in the extension of the top of the backrest S2 with a substantially horizontal and parallel orientation.

Le dispositif d'aide, selon ce mode de réalisation préféré, comprend une assise 1 qui est disposée sur le support d'assise S1, des moyens d'enroulement 3 qui sont disposés à l'arrière de la chaise, une toile 2 qui s'étend de l'assise 1 aux moyens d'enroulement 3 et optionnellement un rouleau de renvoi 4 qui est monté en haut du dossier S2, par exemple au niveau des poignets S22.The aid device, according to this preferred embodiment, comprises a seat 1 which is arranged on the seat support S1, winding means 3 which are arranged at the back of the chair, a canvas 2 which extends from the seat 1 to the winding means 3 and optionally a return roller 4 which is mounted at the top of the backrest S2, for example at the level of the wrists S22.

En se référant à la figure 6, on voit l'assise A plus en détail. Elle comprend une base rigide 11 qui peut être formée par une plaque pleine, éventuellement ajourée, ou par un cadre constitué de barres ou de tiges assemblées. Cette base rigide 11 comprend un bord arrière qui est destiné à venir se positionner au niveau de la chaise où le support d'assise S1 rejoint le dossier S2. Ce bord arrière est avantageusement pourvu de deux bouts d'axes 12a qui pointent vers l'extérieur de manière opposée, mais toutefois alignée, de manière à définir un axe de pivotement 12 visible sur la figure 1. La base rigide 11 forme également deux bords latéraux parallèles et un bord avant qui forme un axe de basculement 13. L'axe de pivotement 12 et l'axe de basculement 13 s'étendent ainsi de manière parallèle, respectivement au niveau des bords arrière et avant de la base rigide 11. L'assise 1 comprend également une garniture d'assise qui forme, dans ce mode de réalisation préféré, une partie arrière 14 solidaire de la base rigide 11 et une partie avant 15 qui est connectée à la base rigide 11 par l'axe de basculement 13, de sorte que cette partie avant 15 peut effectuer en mouvement en arc de cercle par rapport à la base rigide 11 autour de l'axe de basculement 13. Ceci est aisément compréhensible à la vue de la figure 6. La garniture d'assise dans son ensemble permet d'augmenter le confort de l'utilisateur en permettant une certaine déformation. La partie avant 15 comprend un socle rigide 16 dont le bord avant est connecté à l'axe de basculement 13. Lorsque la partie avant 15 est disposée en appui sur la base fixe 11, la garniture d'assise est complète et l'utilisateur ne perçoit pas que cette garniture d'assise est divisée en deux parties distinctes. Selon un mode de réalisation avantageux, la partie arrière 14 occupe deux tiers de l'assise, alors que la partie avant 15 occupe un tiers de l'assise. Ces proportions ne sont toutefois pas limitatives. On pourrait très bien former les parties arrière 14 et avant 15 avec des dimensions sensiblement identiques.With reference to the figure 6 , we see the seat A in more detail. It comprises a rigid base 11 which can be formed by a solid plate, possibly perforated, or by a frame made up of bars or rods assembled. This rigid base 11 comprises a rear edge which is intended to be positioned at the level of the chair where the seat support S1 joins the backrest S2. This rear edge is advantageously provided with two ends of axes 12a which point outwards in an opposite manner, but nevertheless aligned, so as to define a pivot axis 12 visible on the figure 1 . The rigid base 11 also forms two parallel side edges and a front edge which forms a tilting axis 13. The pivoting axis 12 and the tilting axis 13 thus extend parallel, respectively at the rear edges and front of the rigid base 11. The seat 1 also comprises a seat upholstery which forms, in this preferred embodiment, a rear part 14 integral with the rigid base 11 and a front part 15 which is connected to the rigid base 11 by the tilting axis 13, so that this front part 15 can perform in motion in an arc of a circle relative to the rigid base 11 around the tilting axis 13. This is easily understandable from the view of the figure 6 . The seat upholstery as a whole increases the comfort of the user by allowing a certain deformation. The front part 15 comprises a rigid base 16, the front edge of which is connected to the tilting axis 13. When the front part 15 is placed to rest on the fixed base 11, the seat upholstery is complete and the user does not not perceive that this seat upholstery is divided into two distinct parts. According to an advantageous embodiment, the rear part 14 occupies two thirds of the seat, while the front part 15 occupies one third of the seat. These proportions are not, however, limiting. The rear 14 and front 15 parts could very well be formed with substantially identical dimensions.

En revenant à la figure 1, on peut voir que l'assise 1 de la figure 6 est disposée sur le siège en prenant appui sur le support d'assise S1, avec l'axe de pivotement 12 qui est disposé au niveau de l'angle formé par l'arrière du support d'assise S1 et le bas du dossier S2. Les bouts d'axes 12a peuvent très simplement se loger dans cet angle et prendre appui à la fois sur le support d'assise S1 de manière verticale et contre le dossier S2 de manière horizontale. L'assise 1 peut ainsi librement être positionnée sur la chaise sans prévoir d'autres moyens pour la solidariser à la chaise. Toutefois, il n'est pas exclut que l'assise 1 puisse être rendue solidaire de la chaise, par exemple au niveau de ses bouts d'axes 12a. On peut également imaginer que la base rigide 11 puisse être rendue solidaire du support d'assise S1 de manière réversible, pour permettre le pivotement de l'assise 1 par rapport à la chaise.Returning to the figure 1 , we can see that the seat 1 of the figure 6 is arranged on the seat resting on the seat support S1, with the pivot axis 12 which is arranged at the angle formed by the rear of the seat support S1 and the bottom of the backrest S2. The ends of axes 12a can very simply be housed in this angle and be supported both on the seat support S1 vertically and against the backrest S2 horizontally. The seat 1 can thus be freely positioned on the chair without providing other means for securing it to the chair. However, it is not excluded that the seat 1 can be made integral with the chair, for example at its ends of axes 12a. One can also imagine that the rigid base 11 can be made integral with the seat support S1 in a reversible manner, to allow the seat 1 to pivot relative to the chair.

Les moyens d'enroulement 3 sont ici montés de manière amovible au moyen d'une console de fixation 31 aux pieds arrière S3 de la chaise. Les moyens d'enroulement 3 sont fixés à distance du support d'assise S1, mais il serait également envisageable de disposer des moyens d'enroulement 3 avec la console de fixation 31 juste en dessous du support d'assise S1 en haut des pieds arrière S3. Sans sortir du cadre de l'invention, il est également possible de monter les moyens d'enroulement 3 au niveau de l'arrière du dossier S2. Les moyens d'enroulement comprennent un tambour d'enroulement qui est entrainé en rotation par un moteur qui est avantageusement logé à l'intérieur du tambour d'enroulement. Ainsi, les moyens d'enroulement présentent une structure compacte et discrète qui ne nuit pas à l'esthétique de la chaise.The winding means 3 are here removably mounted by means of a fixing bracket 31 to the rear legs S3 of the chair. The winding means 3 are fixed at a distance from the seat support S1, but it would also be conceivable to have the winding means 3 with the fixing console 31 just below the seat support S1 at the top of the rear legs. S3. Without departing from the scope of the invention, it is also possible to mount the winding means 3 at the rear of the backrest S2. The winding means comprise a winding drum which is driven in rotation by a motor which is advantageously housed inside the winding drum. Thus, the winding means have a compact and discreet structure which does not harm the aesthetics of the chair.

La toile 2 peut être réalisée en n'importe quel matériau, à condition qu'il soit souple et résistant à la traction. La toile peut être réalisée avec un tissu formé de fils de chaine et de trame ou avec une feuille souple. La toile 2 comprend une extrémité avant de traction 21 qui est fixée à l'assise 1 et une extrémité arrière d'enroulement 23 qui est opposée à l'extrémité de traction 21 et qui est en prise avec le tambour d'enroulement des moyens d'enroulement 3. Ainsi, la toile 2 peut être enroulée sur le tambour d'enroulement des moyens d'enroulement 3 de manière à créer une tension qui va agir sur l'assise 1, comme on le verra ci-après. L'extrémité de traction 21 peut être fixée au niveau du bord avant de la base rigide 11, à proximité de l'axe de basculement 13. L'extrémité de traction interne peut également être fixée au socle rigide 16 de la partie avant 15. On peut voir sur la figure 1 que la toile 2 recouvre la garniture arrière 14, passe entre les deux garnitures 14 et 15 et se prolonge ensuite sous la garniture avant 15. Quelque soit l'endroit où est fixée exactement l'extrémité de traction 21, elle doit engendrer le basculement de la partie avant 15 par rapport à la base fixe 11. La toile 2 s'étend également sur le dossier S2 dans le prolongement de la partie arrière 14 de la garniture. Ensuite, la toile 2 passe sur le rouleau de renvoi 4 qui est fixé de manière amovible au moyen d'une autre console de fixation 41 sur les poignets S2 de la chaise. De là, la toile 2 est renvoyée directement sur le côté arrière de la chaise aux moyens d'enroulement 3.The canvas 2 can be made of any material, provided that it is flexible and resistant to traction. The fabric can be made with a fabric formed of warp and weft threads or with a flexible sheet. The fabric 2 comprises a front traction end 21 which is fixed to the seat 1 and a rear winding end 23 which is opposite the traction end 21 and which is in engagement with the winding drum of the means of winding 3. Thus, the fabric 2 can be wound on the drum winding of the winding means 3 so as to create a tension which will act on the seat 1, as will be seen below. The traction end 21 can be fixed at the level of the front edge of the rigid base 11, close to the tilting axis 13. The internal traction end can also be fixed to the rigid base 16 of the front part 15. You can see on the figure 1 that the fabric 2 covers the rear lining 14, passes between the two linings 14 and 15 and then extends under the front lining 15. Whatever the location where the traction end 21 is exactly fixed, it must cause the tilting of the front part 15 relative to the fixed base 11. The canvas 2 also extends over the backrest S2 in the extension of the rear part 14 of the lining. Then, the canvas 2 passes over the return roller 4 which is detachably fixed by means of another fixing bracket 41 on the wrists S2 of the chair. From there, the canvas 2 is returned directly to the rear side of the chair to the winding means 3.

Ainsi, lorsqu'une personne est assise sur cette chaise, son séant repose sur la partie de la toile 2 qui recouvre la partie arrière 14 de la garniture. Son dos repose contre la partie de la toile 2 qui recouvre le dossier S2 et ses cuisses reposent sur la partie avant 15 qui n'est pas recouverte par la toile 2. Du fait de sa souplesse, la toile 2 n'engendre aucune gêne pour la personne assise sur la chaise. Au contraire, elle peut même participer au confort de la personne du fait de sa déformabilité.Thus, when a person is seated on this chair, his seat rests on the part of the canvas 2 which covers the rear part 14 of the upholstery. His back rests against the part of the canvas 2 which covers the backrest S2 and his thighs rest on the front part 15 which is not covered by the canvas 2. Due to its flexibility, the canvas 2 does not cause any discomfort for the patient. the person sitting in the chair. On the contrary, it can even participate in the comfort of the person because of its deformability.

On se référera maintenant successivement aux figures 2, 3, 4 et 5 pour décrire le fonctionnement du dispositif d'aide qui vient d'être décrit en référence aux figures 1 et 6. Pour des raisons de simplicité, la chaise a été représentée sans personne assise dessus pour bien comprendre les différentes phases engendrées par la traction de la toile 2.We will now refer successively to the figures 2, 3, 4 and 5 to describe the operation of the aid device which has just been described with reference to the figures 1 and 6 . For reasons of simplicity, the chair has been shown without a person seated on it to fully understand the different phases generated by the pulling of the canvas 2.

En se référant à la figure 2, on voit que la toile 2 a été mise sous tension par les moyens d'enroulement 3, de sorte qu'elle est déjà décollée de la partie arrière 14 et du dossier S2. La toile 2 s'étend alors de manière sensiblement rectiligne de l'assise 1 au rouleau de renvoi 4. Plus précisément, la toile 2 est tendue, mais l'assise 1 n'a pas encore changé de position. Au cours de cette première phase, la personne assise sur la chaise perçoit quand même la tension de la toile 2 qui a pour effet de décoller son dos du dossier S2. En d'autres termes, la personne assise est sollicitée vers l'avant. Son séant est en outre déplacé de la partie arrière 14 vers la partie avant 15.With reference to the figure 2 , we see that the canvas 2 has been put under tension by the winding means 3, so that it is already detached from the rear part 14 and from the backrest S2. The canvas 2 then extends in a substantially rectilinear manner from the seat 1 to the return roller 4. More precisely, the canvas 2 is stretched, but the seat 1 has not yet changed position. During this first phase, the person sitting on the chair nevertheless perceives the tension of the fabric 2 which has the effect of taking off its back from the backrest S2. In other words, the seated person is urged forward. Its seat is further moved from the rear part 14 to the front part 15.

Sur la figure 3, la toile 2 est davantage tendue, de sorte qu'elle enduit le basculement vers l'avant de la partie avant 15 de l'assise autour de l'axe de basculement 13. Lorsqu'une personne est assise sur la chaise, ce basculement est moins prononcé du fait que le séant de la personne repose sur la partie avant 15. Toutefois, un léger décollement de la partie avant 15 peut être perceptible lors de cette phase. En tout cas, la tension de la toile 2 qui s'est accrue peut solliciter encore davantage le séant de la personne assise vers et sur la partie avant 15. On peut clairement voir sur la figure 3 que l'extrémité de traction 21 de la toile 2 est située sous la partie avant 15.On the figure 3 , the canvas 2 is further stretched, so that it coats the forward tilting of the front part 15 of the seat around the tilting axis 13. When a person is seated on the chair, this tilting is less pronounced because the person's seat rests on the front part 15. However, a slight detachment of the front part 15 may be noticeable during this phase. In any case, the tension of the fabric 2 which has increased can place even more strain on the seat of the person seated towards and on the front part 15. One can clearly see on the figure 3 that the traction end 21 of the canvas 2 is located under the front part 15.

Sur la figure 4, la tension de la toile 2 s'est encore accrue de manière à engendrer le pivotement de l'assise 1 autour de l'axe de pivotement 12. On voit en effet que la base rigide 11 est décollé du support d'assise S1, hormis au niveau de l'axe de pivotement 12. Etant donné que l'angle formé entre la base rigide 11 et le support d'assise S1 est faible, le déplacement de la partie avant 15 est sensiblement verticale avec une composante horizontale très faible. La partie avant 15 est toujours basculée vers l'avant autour de l'axe de basculement 13. En revanche, la partie arrière 14 est maintenant orientée vers le dossier S2, du fait du pivotement de l'assise 1. Ainsi, la partie avant 15 et la partie arrière 14 présentent des orientations divergentes. Au cours de cette phase, la personne assise sur la chaise a subi une élévation sensiblement verticale de son séant qui est en appui sur la partie avant 15. La tension plus accrue de la toile 2 sollicite encore davantage le séant de l'utilisateur sur la partie avant 15. On peut même dire que le séant de l'utilisateur ne repose plus que sur la partie avant 15. De ce fait, les jambes de l'utilisateur, dont les pieds reposent au sol, se sont déjà dépliées du fait du déplacement vers l'avant et vers le haut de son séant.On the figure 4 , the tension of the canvas 2 is further increased so as to cause the seat 1 to pivot around the pivot axis 12. It can in fact be seen that the rigid base 11 is detached from the seat support S1, except at the level of the pivot axis 12. Since the angle formed between the rigid base 11 and the seat support S1 is small, the movement of the front part 15 is substantially vertical with a very small horizontal component. The front part 15 is always tilted forwards around the tilting axis 13. On the other hand, the rear part 14 is now oriented towards the backrest S2, due to the pivoting of the seat 1. Thus, the front part 15 and the rear part 14 have divergent orientations. During this phase, the person seated on the chair has undergone a substantially vertical rise in his or her seat which is supported on the front part 15. The increased tension of the fabric 2 places even greater strain on the user's seat on the. front part 15. We can even say that the user's seat rests only on the front part 15. As a result, the user's legs, whose feet rest on the ground, have already unfolded due to the moving forward and upward from his seat.

Sur la figure 5, le dispositif d'aide est dans sa position finale de relevage. On peut voir que l'assise 1 s'est encore davantage décollée du support d'assise S1, avec l'axe de pivotement 12 en appui au niveau de la jonction entre le support d'assise S2 et le dossier S2. L'angle entre le support d'assise S1 et la base rigide 11 est ici de l'ordre de 30°, de sorte que la partie avant 15 s'est majoritairement déplacé vers le haut et très peu vers l'arrière. L'orientation de la partie avant 15 est toujours la même, c'est-à-dire vers l'avant alors que la partie arrière 14 a accentué son orientation tournée vers le dossier S2. L'angle entre la partie avant 15 et la base fixe 11 s'est encore accru, et est maintenant de l'ordre de 45°. Lors de cette phase finale, la personne assise sur le siège est presque en position verticale debout, étant donné que la partie avant 15 est maintenant disposée à une hauteur telle du sol que les jambes de l'utilisateur sont pratiquement entièrement dépliées et que son séant ne repose plus que sur le bord avant de la partie avant 15. L'orientation vers l'avant de la partie avant 15 sollicite le séant de la personne vers l'avant de manière à ce qu'il soit positionné sensiblement à la verticale des pieds qui reposent au sol. Ainsi, la position debout est atteinte ou proche de l'être. La personne n'a pratiquement aucun effort supplémentaire à faire pour parvenir dans la position verticale debout.On the figure 5 , the assistance device is in its final lifting position. It can be seen that the seat 1 has become even more detached from the seat support S1, with the pivot axis 12 resting at the junction between the seat support S2 and the backrest S2. The angle between the seat support S1 and the rigid base 11 is here of the order of 30 °, so that the front part 15 has mostly moved upwards and very little rearward. The orientation of the front part 15 is always the same, that is to say towards the front while the rear part 14 has accentuated its orientation turned towards the backrest S2. The angle between the front part 15 and the fixed base 11 has further increased, and is now of the order of 45 °. In this final phase, the person sitting on the seat is almost in an upright standing position, since the front part 15 is now arranged at such a height from the ground that the user's legs are almost fully extended and his or her sitting only rests on the front edge of the front part 15. The forward orientation of the front part 15 urges the person's seat forward so that it is positioned substantially vertically above the feet resting on the ground. Thus, the standing position is reached or close to it. The person has virtually no additional effort to achieve a standing upright position.

On vient de voir que la mise sous tension de la toile 2 génère plusieurs effets combinés qui proviennent successivement ou cumulativement de :

  • la sollicitation directe de la toile au niveau du dos et du séant de l'utilisateur,
  • le pivotement de l'assise 1 autour de l'axe de pivotement 12, et
  • le basculement de la partie avant 15 autour de l'axe de basculement 13.
We have just seen that the tensioning of the fabric 2 generates several combined effects which come successively or cumulatively from:
  • direct stress on the fabric on the user's back and seat,
  • the pivoting of the seat 1 around the pivot axis 12, and
  • the tilting of the front part 15 around the tilting axis 13.

Grâce à ces sollicitations associées, la personne est successivement décollée de son dossier, poussée vers l'avant, déplacée vers le haut, et finalement libérée en position verticale.Thanks to these associated stresses, the person is successively detached from his backrest, pushed forward, moved upwards, and finally released into a vertical position.

Le mode de réalisation qui vient d'être décrit est un mode préférentiel, mais l'esprit de la présente invention peut plus simplement être mis en œuvre dans un mode de réalisation plus simple qui est représenté sur la figure 7. Dans ce mode de réalisation simplifié, l'assise 1' est fixe par rapport au support d'assise S1. En d'autres termes, aucun mouvement ou déplacement n'est possible entre l'assise 1' et le support d'assise S1. L'assise 1' peut faire partie intégrante de la chaise. En revanche, le dispositif d'aide de ce modèle simplifié comprend toujours une toile 2, des moyens d'enroulement 3 et un rouleau de renvoi 4 qui peuvent être similaires ou identiques à ceux du premier mode de réalisation. La toile 2 est fixée par son extrémité de traction 21 au niveau du bord avant de l'assise 1', alors que son extrémité d'enroulement 23 est fixée aux moyens d'enroulement 3. En variante, l'extrémité de traction 21 peut également être fixée au niveau du haut des pieds S3 de la chaise. On comprend alors aisément qu'une mise sous tension de la toile 2 a pour effet de la décoller du dossier S2 et de l'assise 1'. Une personne assisse sur cette chaise sera ainsi sollicitée vers l'avant vers le haut en raison de l'orientation inclinée de la toile 2 entre la l'assise 1' et le rouleau de renvoi 4. La personne assise sur cette chaise ne sera peut être pas entièrement relevée en position verticale, comme dans le premier mode de réalisation préférentiel de l'invention, mais ce dispositif d'aide simplifié permet tout de même de faciliter le relevage de la personne en position verticale, la personne devant fournir un certain effort pour parvenir à la position verticale.The embodiment which has just been described is a preferred embodiment, but the spirit of the present invention can more simply be implemented in a simpler embodiment which is shown in the figure. figure 7 . In this simplified embodiment, the seat 1 'is fixed with respect to to the seat support S1. In other words, no movement or displacement is possible between the seat 1 'and the seat support S1. The seat 1 'can be an integral part of the chair. On the other hand, the aid device of this simplified model still comprises a canvas 2, winding means 3 and a return roller 4 which may be similar or identical to those of the first embodiment. The fabric 2 is fixed by its traction end 21 at the level of the front edge of the seat 1 ', while its winding end 23 is fixed to the winding means 3. As a variant, the traction end 21 can also be attached at the top of the S3 legs of the chair. It is then easily understood that putting the canvas 2 under tension has the effect of taking it off from the backrest S2 and from the seat 1 '. A person seated on this chair will thus be urged forwards upwards due to the inclined orientation of the canvas 2 between the seat 1 'and the return roller 4. The person sitting on this chair cannot be not be fully raised in a vertical position, as in the first preferred embodiment of the invention, but this simplified aid device still makes it possible to facilitate the lifting of the person in a vertical position, the person having to provide a certain effort to reach the vertical position.

En se référant à la figure 8, on voit un fauteuil roulant classique équipé du dispositif d'aide préférentiel des figures 1 à 6. De manière tout à fait classique, ce fauteuil roulant comprend de grandes roues arrières S4 et deux petites roues avant S5. L'assise 1 peut être identique ou similaire à celle des figures 1 à 6. Le rouleau de renvoi 4 est ici fixé de manière amovible à l'extrémité supérieure du dossier S2. Par exemple, le rouleau de renvoi 4 peut comprendre des broches de fixation amovibles qui pénètrent à l'intérieur des bouts des tubes formant le cadre du dossier S2. Les moyens d'enroulement 3 peuvent être identiques ou similaires à ceux du premier mode de réalisation préférentiel des figures 1 à 6. Ils comprennent un tambour d'enroulement 30 autour duquel la toile 2 est enroulée par l'action d'un moteur 32 qui est logé à l'intérieur du tambour d'enroulement 30. Des moyens d'enroulement 3 sont fixés aux moyens de consoles de fixation amovibles 31 à une barre constitutive du cadre du fauteuil roulant.With reference to the figure 8 , we see a conventional wheelchair equipped with the preferential assistance device for figures 1 to 6 . In a very classic way, this wheelchair includes large S4 rear wheels and two small S5 front wheels. Seat 1 may be the same or similar to that of figures 1 to 6 . The return roller 4 is here removably attached to the upper end of the backrest S2. For example, the return roller 4 can include removable fixing pins which penetrate inside the ends of the tubes forming the frame of the backrest S2. The winding means 3 can be identical or similar to those of the first preferred embodiment of the figures 1 to 6 . They include a winding drum 30 around which the fabric 2 is wound by the action of a motor 32 which is housed inside the winding drum 30. winding means 3 are fixed to the means of removable fixing brackets 31 to a bar constituting the frame of the wheelchair.

On se référera maintenant aux figures 9 à 11 qui montrent un autre fauteuil roulant équipé d'un dispositif d'aide identique ou similaire à celui des figures 1 à 6. Ce fauteuil roulant comprend également de grandes roues arrières S4 et de petites roues avant S5. Il comprend également des accoudoirs S6 et un système de blocage S7 qui agit ici sur les grandes roues arrière S4 pour les bloquer en rotation. Dans ce mode de réalisation encore plus accompli, le dispositif d'aide comprend en outre des moyens de commande 5 disposés au niveau d'un accoudoir S6. Les moyens de commande 5 peuvent par exemple être montés sur un flexible 51 permettant un positionnement spatial aisé. Les moyens de commande 5 sont reliés par un câble 52 aux moyens d'enroulement 3, ainsi que par d'autres câbles 52 au système de blocage S7. Ainsi, lorsque l'utilisateur actionne ces moyens de commande uniques 5, il opère simultanément l'activation des moyens de blocage S7 et des moyens d'enroulement S3. Ceci garantit que le fauteuil est parfaitement fixe et stable lorsque la personne actionne le dispositif d'aide de l'invention. Le dispositif d'aide est en position de repos sur les figures 9 et 10, alors qu'il est position de relevage finale sur la figure 11. Avantageusement, la partie avant basculante 15 peut être recouverte d'un matériau antidérapant pour favoriser l'accrochage du séant de la personne.We will now refer to figures 9 to 11 which show another wheelchair equipped with the same or similar assistive device as the figures 1 to 6 . This wheelchair also includes large S4 rear wheels and small S5 front wheels. It also includes S6 armrests and an S7 locking system which acts here on the large S4 rear wheels to lock them in rotation. In this embodiment which is even more accomplished, the aid device further comprises control means 5 arranged at an armrest S6. The control means 5 can for example be mounted on a flexible tube 51 allowing easy spatial positioning. The control means 5 are connected by a cable 52 to the winding means 3, as well as by other cables 52 to the locking system S7. Thus, when the user actuates these single control means 5, he simultaneously activates the blocking means S7 and the winding means S3. This ensures that the chair is perfectly fixed and stable when the person actuates the aid device of the invention. The assistive device is in the rest position on the figures 9 and 10 , while it is in the final lift position on the figure 11 . Advantageously, the tilting front part 15 can be covered with a non-slip material to promote the attachment of the seat of the person.

Grâce au dispositif d'aide de la présente invention, une personne peut être sollicitée, ou même parfaitement ramenée, en position verticale relevée debout à partir d'une position assise. Un aspect intéressant de l'invention réside dans le fait que ce dispositif d'aide est entièrement amovible, de sorte qu'il est adaptable sur n'importe quel type de siège.By virtue of the assisting device of the present invention, a person can be called upon, or even perfectly brought back, into an upright position raised from a seated position. An interesting aspect of the invention lies in the fact that this aid device is completely removable, so that it can be adapted to any type of seat.

Claims (9)

  1. A seat comprising both a seating support (S1) with a seat back (S2), and also an assist device (1; 1', 2, 3, 4) for assisting a person seated on the seating portion to rise into a vertical position, the assist device (1; 1', 2, 3, 4) comprising a seating portion (1; 1') supported by the seating support (S1) and a canvas (2) that extends over the seating portion (1; 1') and the seat back (S2), the canvas (2) including a traction end (21) that is fastened to the seating portion (1; 1') and an opposite winding end (23) that is engaged on winder means (3) that are arranged at the rear of the seat, such that winding the canvas (2) by means of the winder means (3) causes the canvas (2) to become tightened in such a manner as to lift it off the seating portion (1; 1') and away from the seat back (S2),
    being characterized in that the seating portion (1; 1') is mounted to pivot about a pivot axis (12) that is arranged at the bottom of the seat back (S2), such that the canvas (2) causes the seating portion (1; 1') to rise causing it to pivot about the pivot axis (12).
  2. A seat according to claim 1, wherein the seating portion (1) comprises:
    • a rigid base (11) that defines a rear edge that is adjacent to the bottom of the seat back (S2), an opposite front edge and two side edges the pivot axis (12) being arranged at the rear edge of the rigid base (11), and
    • a seating cushion (14, 15) that is mounted on the rigid base (11), the traction end being fastened to the rigid base (11) in the proximity of or at the front edge.
  3. A seat according to claim 2, wherein the seating cushion (14, 15) comprises a rear portion (14) that is secured to the rigid base (11) and a front portion (15) that is mounted to pivot about a pivot axis (13) that is situated at the front edge, the traction end (21) of the canvas (2) being fastened to the front portion and/or to the front edge, passing below the front portion (15), such that the canvas (2) causes the rigid base (11) to pivot about the pivot axis (12) and the front portion (15) to pivot about the tilt axis (13).
  4. A seat according to claim 3, wherein the rear portion (14) is formed over approximately two thirds of the surface area of the seating portion and the front portion (15) is formed over approximately one third of the surface area of the seating portion.
  5. A seat according to any preceding claim, wherein the seat back (S2) is provided with a deflector roller (4) over which the canvas (2) passes so as to be deflected towards the winder means (3).
  6. A seat according to any preceding claim, including wheels (S4) that are provided with a blocking system (S7) and single control means (5) for simultaneously activating the winder means (3) and the blocking system (S7).
  7. A seat according to any preceding claim, wherein the winder means (3) comprise a winding drum (30) that is turned by a motor (32) that is housed inside the winding drum (30).
  8. A seat according to any preceding claim, wherein the pivot axis (12) comprises two pins (12a) that bear against the frame of the seat at the junction between the seating support and the seat back.
  9. A seat according to any preceding claim, defining a seat frame that forms the seat back (S2) and the seating support (S1), wherein the assist device (1, 2, 3, 4), comprising the seating portion (1), the winder means (3), the canvas (2), and optionally a deflector roller (4), is mounted in removable manner on the seat frame.
EP17706291.6A 2016-01-29 2017-01-27 Chair Active EP3463242B1 (en)

Applications Claiming Priority (2)

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FR1650724A FR3047169B1 (en) 2016-01-29 2016-01-29 CHAIR
PCT/FR2017/050185 WO2017129912A1 (en) 2016-01-29 2017-01-27 Chair

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EP3463242A1 EP3463242A1 (en) 2019-04-10
EP3463242B1 true EP3463242B1 (en) 2020-11-18

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CN112545782A (en) * 2020-11-09 2021-03-26 南京康尼机电股份有限公司 Wheelchair standing assisting mechanism
CN113813122B (en) * 2021-08-05 2022-12-06 邵莉 Rocker-type arm that high-risk lying-in woman postoperative care used
CN117562745B (en) * 2023-11-16 2024-06-04 上海交通大学医学院附属仁济医院 Safety wheelchair

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US5039165A (en) * 1990-04-12 1991-08-13 The Johns Hopkins University Wheelchair toileting module and method
JP4339474B2 (en) * 1999-12-17 2009-10-07 根本企画工業株式会社 Wheelchair standing assistance device and wheelchair having standing assistance device
JP2002209947A (en) * 2001-01-19 2002-07-30 Railway Technical Res Inst Standing and seating assist device
CN101534678B (en) * 2006-08-28 2012-06-13 Gayo实验室有限公司 Adjustable chair for accommodating multiple body positions and methods of use thereof
US7922248B2 (en) * 2007-01-29 2011-04-12 Herman Miller, Inc. Seating structure and methods for the use thereof
US8915549B2 (en) * 2010-07-12 2014-12-23 Raphael Addiego Lifting apparatus
CN104274283B (en) * 2013-07-12 2016-12-28 山东科技大学 A kind of chair having assisted seat
FR3013216A1 (en) * 2013-11-18 2015-05-22 Mk Sante DEVICE FOR AIDING VERTICALIZATION OF A PERSON SITUATED IN A ARMCHAIR
CN204562606U (en) * 2014-12-26 2015-08-19 财团法人自行车暨健康科技工业研究发展中心 Foldable auxiliary lift chair

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FR3047169A1 (en) 2017-08-04
EP3463242A1 (en) 2019-04-10
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WO2017129912A1 (en) 2017-08-03
FR3047169B1 (en) 2021-12-10

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