EP3740181A1 - Fauteuil roulant pliant - Google Patents

Fauteuil roulant pliant

Info

Publication number
EP3740181A1
EP3740181A1 EP19701060.6A EP19701060A EP3740181A1 EP 3740181 A1 EP3740181 A1 EP 3740181A1 EP 19701060 A EP19701060 A EP 19701060A EP 3740181 A1 EP3740181 A1 EP 3740181A1
Authority
EP
European Patent Office
Prior art keywords
frame
folding
rods
wheelchair
folding wheelchair
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.)
Pending
Application number
EP19701060.6A
Other languages
German (de)
English (en)
Inventor
Rainer Küschall
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3740181A1 publication Critical patent/EP3740181A1/fr
Pending legal-status Critical Current

Links

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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
    • A61G5/0816—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair
    • A61G5/0825—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair comprising a scissor-type frame, e.g. having pivoting cross bars for enabling folding
    • 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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0866—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable folding down backrest, e.g. where the backrest folds down onto the seat support
    • 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
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0883—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable having locking means for maintaining a folded or unfolded condition
    • 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
    • A61G5/1062—Arrangements for adjusting the seat adjusting the width of the seat
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/12—Rests specially adapted therefor, e.g. for the head or the feet
    • A61G5/128—Rests specially adapted therefor, e.g. for the head or the feet for feet

Definitions

  • the invention relates to a folding wheelchair according to the preamble of independent claim 1.
  • Such Faltrollstühle with a two side sections comprising a frame, a seat and a folding mechanism
  • the folding mechanism comprises two coupling joints, two rotary joints and a cross brace with two crossing at a pivot rods, each having a first longitudinal end of the two rods of the cross brace is rotatably mounted via one of the rotary joints on one of the two side portions of the frame, in each case a second longitudinal end of the two rods of the cross brace is detachably mounted on one of the coupling joints on the other of the two side portions of the frame, the two rods of the cross brace are rotatable to each other at the pivot point, and a distance between the side portions of the frame is changeable when the second longitudinal ends of the two rods of the crossbar are disengaged from the side portions of the frame, the rods of the crossbar being rotated about the fulcrum to each other can be easily folded and unfolded. This enables them to be efficiently changed between an operating position in which they can be driven by users and
  • Wheelchairs must now meet in addition to a proper use as a means of transport often also requirements for a convenient and easy handling, if they are not currently used.
  • Convenient and robust collapsible wheelchairs often include a folding mechanism with a cross brace.
  • the cross brace of such a wheelchair usually has two crossing at a pivot point and rotatable about these rods, which are vertically aligned.
  • the rods are rotatably mounted at their lower longitudinal ends via a pivotal connection on a side portion of a frame of the wheelchair and at its upper longitudinal end via a coupling connections on the other of the side portions.
  • a distance between the side portions of the frame is reduced, for which purpose the upper longitudinal ends of the two rods of the cross brace are decoupled from the side portions of the frame.
  • the rods of the cross strut are rotated around the pivot point to each other.
  • Such or similar wheelchair is described for example in US 5,496,050 A.
  • foldable wheelchairs are manufactured or assembled in a fixed size.
  • the size of the cross strut or the length of their rods can be decisive for how wide the wheelchair is in the unfolded state.
  • the seat width is determined by the cross strut.
  • series of different sized cross struts are often provided, depending on the seat width to be achieved a suitable cross strut is installed in the wheelchair.
  • the logistical effort in the provision of folding chairs can be relatively high, which adversely affects their profitability.
  • foldable wheelchairs of the type mentioned Another difficulty that occurs in foldable wheelchairs of the type mentioned, is that the wheelchairs are still relatively bulky even in the folded state.
  • the collapsed crossbars typically prevent a backrest portion of the frame from being folded forward.
  • the basic height or the height of the folded wheelchair of the known type is relatively large.
  • the present invention is therefore based on the object to propose a foldable wheelchair, which is robust and can be folded efficiently to a relatively small size.
  • a folding wheelchair which is collapsible and unfoldable between an operating position and a folding position, comprises a two side sections having frame, a seat and a folding mechanism.
  • the folding mechanism has two coupling compounds, two rotary joints and a cross brace with two crossing at a pivot rods.
  • a first longitudinal end of the two rods of the cross brace is rotatably mounted on one of the rotary joints on one of the two side portions of the frame.
  • a second longitudinal end of the two rods of the crossbar is movably mounted via one of the coupling connections on the other of the two side sections of the frame along the other side portion of the frame.
  • the second longitudinal ends can be detachably mounted on the side portions of the frame.
  • the two rods of the cross strut are rotatable relative to each other at the pivot point.
  • a distance between the side portions of the frame is changeable by moving the second longitudinal ends of the two bars of the crossbar from the side portions of the frame along the other side portion of the frame.
  • the rods of the cross strut are rotated around the pivot point to each other.
  • the term "seat” may refer to a seat support in connection with the inventive folding wheelchair, which carries or supports a user during operation of the folding wheelchair.
  • the seat can be upholstered and / or sprung, for example, by means of a cushion.
  • operation in connection with the operating position and with the use of the folding wheelchair is understood to mean a state in which the folding wheelchair is constructed and used as intended or can be.
  • the folding wheelchair can be used or moved during operation by a user for locomotion.
  • rod is understood in connection with the cross strut a longitudinal element. It may in particular be rail, beam, post or tubular and have any, for example, angular, round or oval cross-section.
  • the crossbar extends from the first longitudinal ends of the two rods to the second longitudinal ends of the two rods in a cross strut direction which extends in the operative position substantially along the seat.
  • the rotary joints, the coupling joints or the rotary joints and the coupling joints are offset along the cross strut direction to the two side portions of the frame.
  • the cross strut direction can be quasi horizontal, in particular in the operating position of the folding wheelchair.
  • the crossbar As the crossbar extends substantially along the seat, it may be in a plane that is more or less parallel to the seat. So the cross strut can also be virtually horizontal.
  • the term "quasi-horizontal" leaves it open whether there is a slight deviation from a precise horizontal alignment.
  • the seat of the folding wheelchair may be slightly lowered at the rear, so that a user of the wheelchair is seated securely in the seat, and the cross brace may be exactly horizontal or slightly lowered in an analogous manner at the rear.
  • substantially along the seat may refer to an arrangement in a plane parallel to the seat or to a seat plane, said plane to the seat plane to be a maximum of 30 °, a maximum of 20 °, a maximum of 10 or a maximum of 5 ° can. Since it is possible that in certain embodiments the seat may not lie exactly in one plane, the term “seat plane” may refer to a fictitious plane on which a user of the folding wheelchair is sitting in operation.
  • the seat may be formed by a textile disposed between the side portions of the frame which hangs slightly toward the center. Such a seat nevertheless forms an at least fictitious seat plane on which the user can sit.
  • the seat includes a pad to accommodate the buttocks of a
  • a user who is horizontally aligned and has a more or less flat surface.
  • the orientation of the cross strut along the seat allows the folding wheelchair to be comparatively compact in its folded state.
  • the angle between the rods are changed.
  • the side portions facing angle between the rods can be increased when reducing the distance between the side sections.
  • the other two angles between the bars can be reduced.
  • the frame may be a total or predominantly a pipe construction.
  • the side sections or side frames can also be made as flat elements with advantage of a relatively lightweight material such as carbon, as a pipe construction or as a combination thereof.
  • the term "displaceable" may refer to a movement along the cross strut direction in connection with the rotary or coupling connections, wherein they can be blocked to the side sections.
  • shifting may relate to flexibly setting the position of the coupling links at a plurality of locations along the crossbar direction.
  • the offset on the one hand freely selectable to predetermined positions can be done so stepped or on the other hand stepless at any position over a given area or scope.
  • a distance of the side portions of the frame in the operating position can be defined or adjusted.
  • a distance between the side portions and thus a seat width is increased.
  • This aspect of the invention thus makes it possible to implement different seat widths in folding wheelchairs by means of the same folding mechanism.
  • the for example it allows a dealer not to stock matching folding wheelchairs for every seat width measurement. But he can locally adjust the seat width by means of the folding mechanism on each individual folding wheelchair to the needs of a user.
  • the folding wheelchair can be designed so that the displacement must be done by a professional, for example, using a specific tool.
  • the folding wheelchair would thus be matched or made up by the dealer for the user. Or it may be executed so that the translation is done by the user himself.
  • the folding wheelchair can also be used, for example, by several users who require a different seat width.
  • the flexible displacement and concomitant adjustment of the seat width dimension may also allow the folding wheelchair to be reused. It enables a reduction in the cost of providing folding wheelchairs, which can significantly improve the accessibility to such folding wheelchairs.
  • the folding wheelchair according to the invention in a robust design enables an efficient folding to a relatively small size and at the same time a flexible adjustment of the seat width or the width of the seat width.
  • the rotary joints of the folding mechanism each comprise a hinge, via which one of the rods of the crossbar is hinged to one of the side portions of the frame.
  • a hinge can provide a robust, rotatable connection.
  • the coupling connections of the folding mechanism are preferably each formed with a fixing structure which can be fastened at different points along the cross-strut direction to the associated one of the two side sections of the frame.
  • the different locations along the cross strut direction allow adjustment of the rotation of the rods in the operating position to each other.
  • a seat width can be defined or predefined.
  • the different locations can be continuous or flowing over a certain range of the side sections or also rasterized or at selected points.
  • the fixing structures of the coupling connections of the folding mechanism each have a clamping device which can be fastened by clamping to the associated one of the two side sections of the frame.
  • Such a clamping structure allows for efficient mounting at an arbitrary position or a continuous mounting.
  • a stepless displacement and adjustment of the seat width measure can be achieved.
  • the fixing structures of the coupling connections each have a latching device and the side sections of the frame are equipped with counter-latching structures, which cooperate for fastening with the latching device of the fixing structure of the respective associated coupling connections.
  • Such a configuration may allow a comparatively robust coupling and a stepped offset.
  • the latching devices of the fixing structures of the coupling connections can each be equipped with an engagement part and the counter-latching structures of the side sections of the frame each with a toothing.
  • the latching devices of the fixing structures of the coupling connections can each be equipped with a pin and the counter-latching structures of the side sections of the frame can each be equipped with a pin receptacle.
  • the pin receptacles can be formed as perforations or blind holes.
  • the folding mechanism comprises a first intermediate structure disposed between the first longitudinal ends of the two bars of the crossbar and the side portions of the frame, and a second intermediate structure disposed between the second longitudinal ends of the two bars of the crossbar and the side portions of the frame is.
  • Such intermediate structures allow a robust design of the folding mechanism, which can ensure that the side sections are gripped in several places. Tilting or bending of the side sections can be prevented.
  • the Faltrollstuhl comprises two drive wheels, which are mounted in the operating position respectively at one of the side portions of the frame.
  • the drive wheels are preferably mounted by means of a manually operable quick release on the side portions of the frame.
  • the two side portions of the frame in the operating position the seat. This allows an efficient and robust design of the seat or the folding wheelchair.
  • the folding wheelchair includes two steering wheels and the frame has a front portion on which the steering wheels are mounted.
  • the wheelchair preferably comprises a footrest, which is mounted on the front portion of the frame.
  • the footrest can be a rigid construction that can be folded up, buckled or removed, for example, during the narrowing of the distance between the side portions of the frame. Such a rigid construction can form a robust support which contributes to the stability of the folding wheelchair in the operating position.
  • the footrest may be formed by a textile or soft or flexible construction that is folded together as the distance between the side portions of the frame decreases. Such a footrest can promote a particularly efficient folding of the folding wheelchair.
  • the front portion of the frame preferably comprises two foot tubes, each departing from one of the side portions of the frame and to each of which one of the two steering wheels is mounted.
  • the footpipes can exit the side sections virtually horizontally and run downwards over a bend more or less vertically or, in the operating position, along the lower legs of the user.
  • the folding wheelchair comprises a backrest and the frame comprises a rear portion, on which the backrest is mounted.
  • the backrest may be oriented substantially vertically in the operating position. In particular, it can serve to support the back of the user during operation of the folding wheelchair.
  • the rear portion of the frame is preferably hinged to the side portions of the frame, so that the backrest is folded forward in the folding position. In this way, the backrest can be folded forward on the lower-lying seat, which can significantly reduce the height of the folding wheelchair in the folding position.
  • the side portions of the frame each have a guide structure and the coupling connections of the folding mechanism each comprise a sliding member, which is coupled to the guide structure of one of the side portions and movable along this guide structure.
  • the guide structures may be formed as rails or scenes in the side sections.
  • Such guide structures and slide members enable efficient and accurate movement of the second longitudinal ends of the two rods of the crossbar along the side portions of the frame.
  • each side section can be equipped with two guide structures and the coupling connections can each be equipped with two slide parts which are each coupled to one of the two guide structures of the associated side section. This can increase the stability of the guided movement.
  • the pivot point of the rods of the cross strut of the folding mechanism is formed by a coupling element, wherein the coupling element comprises two rotatable rotatable parts, of which one rotary member is rigidly connected to one of the two rods of the cross strut of the folding mechanism and the other rotary member rigid connected to the other of the two rods of the cross strut of the folding mechanism.
  • a coupling part allows on the one hand a clean stable support of the rods at the fulcrum. On the other hand, it also allows a guided and safe rotation of the rods to each other. Thereby, an angle between the or spreading of the rods can be efficiently changed, whereby a distance of the side portions of the frame and thus the seat width is changed.
  • the two rotary parts of the coupling element are preferably lockable to each other in several different rotational positions.
  • the rods or their spread can be flexibly fixed to each other.
  • the distance between the side portions of the frame can be set and also fixed.
  • Such a lock can be designed to allow the rods are locked at predetermined angles or spread to each other.
  • the possible distances between the two side sections of the frame and its possible seat widths can be preset.
  • the rotary parts can be locked together by engaging in openings bolts or by screwing or jamming.
  • the coupling element has a toothing, which locks the two rotary parts in the several different rotational positions to each other.
  • the toothing can be formed on the two rotary parts. It may also be formed on a further component of the coupling element, such as the rotation axis described below.
  • the rotating parts can be efficiently locked at predetermined rotational positions to each other.
  • the angle or the spreading of the rods to each other and thus the distance between the two side portions of the frame may also be predetermined.
  • the frame can be efficiently configured to be set in various predetermined seat widths.
  • the coupling element preferably has an axis of rotation which is coupled to the two rotary parts, and an operating element, wherein the axis of rotation comprises the toothing and the operating part can engage in different positions in the toothing, so that the rotary parts in the several different rotational positions locked to each other.
  • the axis of rotation comprises the toothing and the operating part can engage in different positions in the toothing, so that the rotary parts in the several different rotational positions locked to each other.
  • the control panel is preferably sprung mounted to the axis of rotation.
  • it can be stored sprung so that it is pulled without a tensile or compressive force in the toothing. It can thereby be achieved that the operating part engages or engages in the toothing and the rods are locked to one another without a user being actively involved. This allows a safe adjustment of the seat width of the wheelchair.
  • the distance between the side portions of the frame in a range of about 30 cm to about 55 cm or in a range of about 36 cm to about 45 cm changeable.
  • Such a setting range allows the wheelchair to be adjusted continuously or in predetermined positions in the standard and standard seat widths implemented.
  • the distance between the side portions of the frame is preferably variable in predefined steps, for example, of about 36 cm, about 38 cm, about 40 cm, about 42 cm and about 45 cm.
  • the possible seat widths of the wheelchair can be adjusted in particular to the usual values.
  • FIG. 1 is a perspective view of a first embodiment of a folding wheelchair according to the invention.
  • Fig. 2 is a plan view of a folding mechanism of the folding wheelchair of Fig. 1 in a
  • Fig. 3 is a plan view of the folding mechanism of the folding wheelchair of Fig. 1 in one
  • Fig. 4 is a plan view of the folding mechanism of the folding wheelchair of Fig. 1 in one
  • FIG. 5 is a front view of the folding mechanism of the folding wheelchair of Fig. 1 in the
  • FIG. 6 shows a perspective view of a frame of a second exemplary embodiment of a folding wheelchair according to the invention in an operating position
  • FIG. 7 is a perspective view of the frame of Fig. 6 in a folded position; and FIG. 8 is an exploded perspective view of a coupling element of the frame of FIG. 6.
  • front and rear are used in the context of the folding wheelchair so that the area of the folding wheelchair, which is designed to receive the feet of a user, lies in front and the area which is designed to receive the back, lies behind ,
  • the typical direction of travel is accordingly also forward or forward.
  • Embodiment is missing. Rather, such omission may serve the purpose of clarity and prevention of repetition.
  • the following definition applies to the entire further description: If reference signs are included in a figure for the purpose of clarity of drawing, but are not mentioned in the directly related descriptive text, reference is made to the explanation thereof in the preceding description of the figures. If reference signs are also mentioned in the description text directly related to a figure, which are not included in the associated figure, reference is made to the preceding and following figures. Like reference numerals in two or more figures indicate similar or like elements.
  • Fig. 1 shows a first embodiment of an inventive
  • the folding wheelchair 1 comprises a predominantly designed as a tubular construction frame 2, a seat 3, a folding mechanism 4, two larger drive wheels 5 and two smaller steering wheels 6.
  • the frame 2 is formed symmetrically in two parts with a left and a right tubular construction. He has several corresponding two-part sections and in particular a front Front portion 22, a rear portion 23 and two arranged between the front portion 22 and rear portion 23 middle side portions 21st
  • the front portion 22 of the frame 2 comprises two parallel each connected via an arc with the associated side portion 21 foot tubes 221 which end in rubber stopper foot 222 down.
  • the foot tubes 221 are connected to each other via a flip-up footrest 7. They run approximately along the lower legs of a user of the folding wheelchair when it sits on it.
  • the side portions 21 of the frame 2 each have a quasi-horizontal top tube 212 and a parallel thereto extending in a vertical distance down tube 211.
  • the rear portion 23 of the frame 2 comprises on both sides in each case a quasi-vertical tube, wherein a backrest 231 is attached to these tubes so that it lies between the tubes.
  • the backrest 231 can be folded forward.
  • the folding mechanism 4 is arranged between the two side portions 21 of the frame 2, the folding mechanism 4 is arranged. It comprises a first or rear intermediate structure 44, each having a quasi-vertical rear vertical strut 441 on both sides and a second or front intermediate structure 45 having a quasi-vertical front vertical strut 451 on both sides.
  • the rear vertical struts 441 each extend on one of the two sides in a rear region The side portions 21 of the frame 2 between the down tube 211 and the top tube 212.
  • the front vertical struts 451 each extend on one of the two sides in a front region of the side portions 21 of the frame 2 between the down tube 211 and the top tube 212.
  • the rear vertical struts 441 and the front vertical struts 451 are interconnected via a quasi-vertical cross strut 41 of the folding mechanism 4.
  • the crossbar 41 includes two bars 411 crossing at a fulcrum 412. One of the two bars 411 extends from the left rear vertical strut 441 to the right front vertical strut 541 and the other of the two bars 411 extends from the right rear vertical strut 441 to the left front vertical strut 451st
  • the seat 3 comprises a cushion 31 and a cushion support 32, which is connected to the two upper tubes 212 of the side portion 21 of the frame 2.
  • the upper tubes 212 carry the post carrier 32, which in turn supports the pad 31.
  • the top of the poster 31 defines a seating plane which is more or less parallel to the crossbar 41 of the folding mechanism 4. In particular, such a cross strut direction 8 runs along the seat 3.
  • the two drive wheels 5 of the folding wheelchair 1 are mounted on both sides in each case from the outside to a wheel suspension of the side portions 21 of the frame 1. They are equipped with a quick release 51, which allows easy manual assembly and disassembly.
  • the steering wheels 6 are rotatably mounted to respective ones of the down tubes 211 via respective suspensions about a vertical axis.
  • the frame 2 further comprises two side panels 24, which are each arranged on one side of the seat 3 between the seat 3 and the drive wheel 5. They allow protection of the user seated on the seat 3 while driving.
  • the folding wheelchair 1 is shown in an operating position in which it can be driven by the user.
  • the folding mechanism 4 is shown from above in a first seat width.
  • the rods 411 of the cross brace 41 each have a first and rear longitudinal end 4111 and a second or front longitudinal end 4112, respectively. At their rear longitudinal ends 4111, the rods 411 are respectively fixed to one of the rear vertical struts 441 and at their front longitudinal ends 4112 to one of the front vertical struts 451, respectively.
  • the folding mechanism 4 further comprises two rear pivotal connections 42 and two front coupling connections 43.
  • the pivotal connections 42 are each formed from a socket 421 molded onto the upper end of the rear vertical strut and a joint 422 connected to the associated upper tube 212.
  • the pivotal connections 42 enable the rods 411 of the crossbar 41 to be rotated toward the top tubes 212 about a quasi-vertical axis.
  • the two coupling connections 43 are each formed from a molded-on at the upper end of the front vertical strut socket 431 and a perforation 432 as a pin receptacle in the top tube 212 cooperating pin 433 of a locking device of a fixing structure.
  • the pins 433 are in opposite directions Perforated holes 432 inserted in the upper tubes 212 and cooperate with the sockets 431, so that the front vertical struts 451 are held or coupled.
  • the pins 433 are respectively inserted into a selected perforation 432 of a series of perforations 432.
  • a seat width is predetermined, whereby a suitable seat width for the selected seat 3 and a matching backrest 231 can be selected.
  • the pins are inserted into other holes, which are closer to the rotary joints 42, the rotation angle of the rods 41 1 of the cross brace 41 to each other about the pivot point 412 changed so that the lateral angle between the Rods 41 1 reduced and the front or rear angle between the rods 41 1 are increased.
  • a distance between the left upper tube 212 and the right upper tube 212 and the left lower tube 21 1 and the right lower tubes 21 1 and thus the distance between the side portions 21 of the frame 2 in comparison to FIG. 2 is increased.
  • a suitable for the selected larger seat width seat 3 and a matching backrest 231 can now be selected.
  • Fig. 4 shows the folding mechanism 4 of the folding wheelchair 1 folded in a folding position.
  • the sockets 431 of the front vertical struts 451 are decoupled from the side portion or released and pivoted forward.
  • the two rods 41 1 of the cross brace 41 are rotated relative to each other about the pivot point 412 that the lateral angle between the rods 41 1 maximum and front or rear angle between the rods 41 1 are minimal.
  • the two sides of the frame 2 are maximally moved towards each other so that a distance between them is minimal.
  • the folding mechanism 4 is shown from the front. It can be seen that the front vertical struts 451 of the front intermediate structure 45 next to the upper Sockets 431 also each have a lower frame 432. In this case, the lower sockets 432 surround the lower tubes 211 of the side portion 21 of the frame 2.
  • the sockets 431, 432 are each quasi C-shaped in cross-section.
  • Fig. 6 shows a frame 20 with a folding mechanism 40 of a second embodiment of an inventive folding wheelchair.
  • the folding wheelchair further comprises a seat, two larger drive wheels and two smaller steering wheels, all of which are not shown in Fig. 6.
  • the frame 20 is symmetrical with a front front portion 220, a rear portion 230, and two middle side portions 210 disposed between the front portion 220 and the rear portion 230.
  • the front portion 220 of the frame 20 comprises two parallel each connected via an arc with the associated side portion 210 foot tubes 2210, which are connectable to a footrest down.
  • the side portions 210 of the frame 20 each have a quasi-horizontal top tube 2120 and a parallel thereto extending in a vertical distance down tube 2110.
  • the upper tubes 2120 and the lower tubes 2120 are each equipped with a link 4320 as a guide structure.
  • the rear portion 230 of the frame 20 comprises on both sides in each case a quasi-vertical pipe each ending in a handle 240, wherein a backrest can be fastened to these pipes in such a way that it lies between the pipes.
  • the backrest 231 can be folded forwardly via folding hinges 250 arranged between the rear section 230 and side sections.
  • the folding mechanism 40 is arranged. It comprises a first or rear intermediate structure 440, each having a quasi-vertical rear vertical strut 4410 on both sides and a second or front intermediate structure 450 each having a quasi-vertical front vertical strut 4510 on both sides.
  • the rear vertical struts 4410 each extend on one of the two sides in a rear region
  • the front vertical struts 4510 extend on either side in a front portion of the side portions 210 of the frame 20 between the down tube 2110 and the top tube 2120, respectively.
  • the rods 4110 of the crossbar 410 each have a first and rear longitudinal end 41110 and a second and front longitudinal end 41120, respectively. At their rear longitudinal ends 41110, the rods 4110 are respectively fixed to one of the rear vertical struts 4410 and at their front longitudinal ends 41120 to one of the front vertical struts 4510, respectively.
  • the rear vertical struts 4410 and the front vertical struts 4510 are interconnected via a quasi-vertical cross strut 410 of the folding mechanism 40.
  • the crossbar 410 includes two bars 4110 crossing at a fulcrum 4120. One of the two bars 4110 extends from the left rear vertical strut 4410 to the right front vertical strut 4510 and the other of the two bars 4110 extends from the right rear vertical strut 4410 to the left front vertical strut 4510th
  • the fulcrum 4120 is formed by a coupling element 90.
  • the coupling member 90 includes an upper rotary member 910 and a lower rotary member 920 rotatably connected thereto.
  • the upper rotary member 910 is rigidly connected to the upper one of the rods 4110 and the lower rotary member 920 is rigidly connected to the lower one of the two rods 4110.
  • the folding mechanism 40 further comprises two rear pivot connections 420 and two front coupling connections 430.
  • the pivot connections 420 each have a joint 4220 connected to the associated upper and lower tubes 2110, 2120.
  • the pivot connections 420 allow the rods 4110 of the crossbar 410 to be rotated to the upper and lower tubes 2110, 2120 about a quasi-vertical axis.
  • the two coupling links 430 are each formed of sliding parts formed by the upper and lower ends of the front vertical struts 4510 and the links 4320.
  • the lower scenes 4320 each have an upwardly directed horizontal sliding surface and the upper links 4320 each have a downwardly oriented horizontal sliding surface.
  • the front vertical struts 4510 are each arranged between the scenes 4320 of the associated side section 210, that the vertical ends of the front vertical struts 4510 and their sliding parts abut the sliding surfaces of the scenes 4320. On In this way, the front vertical struts 4510 can efficiently slide back and forth along the side portions 210 of the frame 20.
  • Fig. 1 the folding wheelchair 1 is shown in an operating position in which it can be driven by the user.
  • an angle between the two rods 4110 is set so that a distance between the side portions 210 is adjusted to a desired seat width.
  • the front vertical struts 4510 of the folding mechanism 40 are moved comparatively far back along the frame 20.
  • Fig. 2 shows the frame in a folded position or folded position.
  • the upper rotary part 910 and the lower rotary part of the coupling element 90 are rotated relative to each other so that the angles between the rods 4110 are changed so that the front vertical struts 4510 of the folding mechanism 40 are moved forward along the frame 20.
  • the rods 4110 are also rotated via the joints 4220 to the associated side sections 210.
  • the rear portion 230 of the frame 20 and its ends in a handle 240 tubes are folded around the folding joints 250 to the front. In this folding position, the frame 20 is extremely compact.
  • the coupling element 90 is shown in detail. It can be seen that the upper rotary part 910 and the lower rotary part 920 are each formed with a groove formed for grasping and partially grasping the bars 4110 of the cross-linkage 410.
  • the coupling element 90 further comprises a rotation axis 930 and a control unit 940.
  • the rotation axis 930 is equipped with a shaft rod 9310 and toothed pulleys 9320 as toothing.
  • the toothed discs 9320 are mounted approximately centrally on the axle rod, so that the toothing is aligned radially outwards.
  • the keypad 940 includes a crescent-shaped latch 9420 and two springs 9410.
  • the axle rod 9310 extends through the upper and lower rotating parts 910, 920 through respectively provided vertical bores 9110, 9210.
  • the operating part 940 is mounted on the upper rotating part 910 by means of two screws.
  • the two screws protrude through two associated horizontal holes 9120 of the Upper rotary part 910.
  • the two springs 9410 are thereby positioned on a side facing away from the latch 9420 side of the upper rotary part 910, that the latch 9420 is pulled in the direction of the toothing of the rotation axis 930.
  • the coupling element 90 thus automatically locks the rods 410.
  • the present disclosure also includes embodiments having any combination of features that are mentioned or shown above or below various embodiments. It also comprises individual features in the figures, even if they are shown there in connection with other features and / or are not mentioned above or below. Also, the alternatives of embodiments and individual alternatives described in the figures and the description may be excluded from the subject matter of the invention or from the disclosed subject matter.
  • the disclosure includes embodiments which exclusively comprise the features described in the claims and in the exemplary embodiments as well as those which include additional other features.

Abstract

L'invention concerne un fauteuil roulant pliant (1) qui peut être plié et déplié entre une position d'utilisation et une position de pliage et qui comporte une armature (2) comprenant deux sections latérales (21), une assise (3) et une mécanique de pliage (4). La mécanique de pliage (4) comprend deux raccords de couplage (43), de raccords de rotation (42) et un croisillon (41) pourvu de deux tringles (411) se croisant à un point de rotation (412). Une première extrémité longitudinale (4111) des deux tringles (411) du croisillon (41) est montée respectivement par le biais d'un des raccords de rotation (42) au niveau de l'une des deux sections latérales (21) de l'armature (5) de manière à pouvoir tourner. Une deuxième extrémité longitudinale (4112) des deux tringles (411) du croisillon (41) est montée respectivement par le biais d'un des raccords de couplage (43) au niveau de l'autre section parmi les deux sections latérales (21) de l'armature (5) de manière amovible. Les deux tringles (411) du croisillon (41) peuvent tourner l'une par rapport à l'autre au niveau du point de rotation (412). Une distance entre les sections latérales (21) de l'armature (5) est modifiable, si les deuxièmes extrémités longitudinales (4112) des deux tringles (411) du croisillon (41) sont séparées des sections latérales (21) de l'armature (5). Les tringles (411) du croisillon (41) sont ainsi tournées l'une par rapport à l'autre autour du point de rotation (412). Le croisillon (41) s'étend des premières extrémités longitudinales (4111) des deux tringles (411) aux deuxièmes extrémités longitudinales (4112) des deux tringles (411) dans une direction de croisillon (8) qui part sensiblement le long de l'assise (3) dans la position d'utilisation. Les raccords de rotation (42), les raccords de couplage (43) ou les raccords de rotation (42) et les raccords de couplage (43) peuvent être déplacés le long de la direction de croisillon (8) par rapport aux deux sections latérales (21) de l'armature (2).
EP19701060.6A 2018-01-15 2019-01-15 Fauteuil roulant pliant Pending EP3740181A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00040/18A CH714557A1 (de) 2018-01-15 2018-01-15 Faltrollstuhl.
PCT/EP2019/050893 WO2019138126A1 (fr) 2018-01-15 2019-01-15 Fauteuil roulant pliant

Publications (1)

Publication Number Publication Date
EP3740181A1 true EP3740181A1 (fr) 2020-11-25

Family

ID=61971869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19701060.6A Pending EP3740181A1 (fr) 2018-01-15 2019-01-15 Fauteuil roulant pliant

Country Status (5)

Country Link
US (1) US11246773B2 (fr)
EP (1) EP3740181A1 (fr)
CA (1) CA3088473A1 (fr)
CH (1) CH714557A1 (fr)
WO (1) WO2019138126A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10828213B1 (en) * 2017-07-07 2020-11-10 Ki Mobility, LLC Foldable tiltable wheelchair and frame therefor
KR102435560B1 (ko) * 2022-06-10 2022-08-23 백승현 등받이 연동형 전고 및 전폭 접이식 휠체어용 프레임

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101143A (en) * 1977-01-03 1978-07-18 American Safety Equipment Corporation Wheelchairs
US5284350A (en) 1992-05-22 1994-02-08 Medical Composite Technology Foldable wheelchair and side frame assembly
US6164674A (en) * 1995-06-05 2000-12-26 Adorno/Rogers Technology, Inc. Adjustable wheelbase wheelchair
US6499762B1 (en) * 1995-06-05 2002-12-31 Adorno/Rogers Technology, Inc. Frame support apparatus and coupling device for use with an ambulatory system and method of fabrication thereof
US6279934B1 (en) * 2000-09-14 2001-08-28 Robert C. Womack One-handed drive wheelchair having relative speed control for rear wheels
EP1762210A1 (fr) * 2005-09-08 2007-03-14 Invacare International Sàrl Châssis de fauteuil roulant pliable et fauteuil roulant pliable
US8454048B1 (en) * 2012-01-30 2013-06-04 Columbia Medical Manufacturing, Llc Folding wheelchair mechanism
US9655794B2 (en) * 2015-10-07 2017-05-23 Edward T. Bednarz, III Adjustable wheelchair

Also Published As

Publication number Publication date
US20200405551A1 (en) 2020-12-31
CH714557A1 (de) 2019-07-15
WO2019138126A1 (fr) 2019-07-18
CA3088473A1 (fr) 2019-07-18
US11246773B2 (en) 2022-02-15

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