EP3556336B1 - Rigid frame wheelchair - Google Patents

Rigid frame wheelchair Download PDF

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Publication number
EP3556336B1
EP3556336B1 EP18167665.1A EP18167665A EP3556336B1 EP 3556336 B1 EP3556336 B1 EP 3556336B1 EP 18167665 A EP18167665 A EP 18167665A EP 3556336 B1 EP3556336 B1 EP 3556336B1
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EP
European Patent Office
Prior art keywords
frame
seat
strut
foot support
seat tube
Prior art date
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EP18167665.1A
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German (de)
French (fr)
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EP3556336A1 (en
Inventor
Gregor Horacek
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Individual
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Individual
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Priority to EP18167665.1A priority Critical patent/EP3556336B1/en
Priority to US16/373,438 priority patent/US11160702B2/en
Publication of EP3556336A1 publication Critical patent/EP3556336A1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
    • A61G5/0891—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable having rigid supports, e.g. seat or back supports which retain their shape after folding of the wheelchair
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1054—Large wheels, e.g. higher than the seat portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1056—Arrangements for adjusting the seat
    • A61G5/1059—Arrangements for adjusting the seat adjusting the height of the seat
    • 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
    • A61G5/1075—Arrangements for adjusting the seat tilting the whole seat backwards
    • 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 rigid frame wheelchair, which is designed according to the box frame concept.
  • Rigid-frame wheelchairs are well known from the prior art. They are used where the main focus is on low weight, rigidity and maximum maneuverability.
  • the frame (without a back frame) consists of an L-shaped seat foot support frame - with a seat frame segment and a foot support frame segment - And a, welded on the seat frame segment (individual construction) or adjustable (adjustable) rear axle construction.
  • the advantages of this concept are the low weight and the space-saving accommodation (with the rear wheels / drive wheels removed) for transport, since the L-shaped frame takes up little space and can be easily inserted between other packages in the trunk.
  • the steering forks are attached to the frame so that they can be adjusted so that their axis of rotation can always be aligned with the vertical or vertical regardless of the seat angle set. This is essential to avoid “fluttering" of the steering wheels.
  • the distance between the rear axle and the seat tube is adjusted to adjust the seat angle (or the rear seat height). The closer the rear axle is to the seat tube, the greater the seat angle for a given seat height.
  • the camber adapter is rotatably installed in the rear axle tube or in the rear wheel holder. This enables the rear wheels to be adjusted when changing the seat angle.
  • the toe adjustment is also essential for a smooth running of the rear wheels.
  • the exact seat height (for a given frame size) is set by choosing different height steering forks, as well as by the different height positioning of the steering wheels in the steering forks, the setting of the seat angle (or rear seat height) by adjusting the distance between the rear axle and the seat frame.
  • the object of the present invention is to develop a rigid-frame wheelchair in an adaptable box-frame concept, which has the features of the preamble of claim 1, in such a way that the adjustment of the seat height and seat angle with less use of material and less work increases is accomplished.
  • the respective frame connector has an elongated hole, which is arranged inclined to an adjacent elongated hole of the corresponding seat tube segment, and means for fixing frame connectors and seat tube segment penetrating the elongated holes, for fixing the respective frame connector and associated seat tube segment in different positions.
  • the seat angle and seat height are set solely by turning the seat foot support frame with the coupling units (seat angle), or by moving the coupling units (seat height) and by fixing the seat tube segments to the left and right frame connectors.
  • the foot support tube segments are firmly connected to the coupling units in their adjusted displacement position.
  • provision can be made to block the joints after the angle adjustment of the foot support tube segments.
  • FIG. 1 shows a foldable wheelchair 1 without the seat and back surfaces serving to accommodate a person.
  • the essential parts of the wheelchair 1 include a base frame 2, a seat foot support frame 6, a cross strut 10, a left frame connector 11 and a right frame connector 12, coupling units 13, a back frame 14, a footrest 15, rear wheels 16, front wheels 17, and a left one Rear brake 18 and a right rear brake 19 and a left wheel cover 20 and a right wheel cover 21 on ( FIG. 1 ).
  • the base frame 2 ( FIG. 3 ), consisting of left side strut 3, right side strut 4 and rear axle 5, is by means of coupling units 13, each consisting of ( FIG. 5 ) Coupling piece 24, clamping element 25 and connecting elements 26, 27, 28, 29, 30 and 31 with the seat foot support frame 6 articulated about an axis vertical to the sagittal plane ( FIG. 2 ).
  • the embodiment of the base frame 2 shown here represents only one possible embodiment.
  • the side struts 3 and 4 could, for example, also be designed such that they each consist of a tube bent part, the front tube section of which is perpendicular to the sagittal plane and the coupling unit 13 can be rotated and clamped directly records.
  • Separate steering fork mounts could be attached to suitable pipe sections.
  • the rear axle 5 in the embodiment shown here is displaceable on the struts 3 and 4 to adjust the wheelbase and is fixed by clamping. But it could also be welded directly to the side struts 3 and 4, for example.
  • the rear axle 5 is arranged perpendicular to the sagittal plane.
  • the multifunction parts 23 each have a blind hole 42 on their side facing the sagittal plane ( FIG. 3 ) with a stub 43 ( FIG. 5 ) of the respective coupling piece 24 corresponds.
  • the axis of the blind hole is perpendicular to the sagittal plane.
  • the coupling units 13 are each screwed to the side struts 3 and 4 on the multifunction parts 23 by means of connecting elements 33 and 34.
  • the left and right struts 7 and 8 of the seat foot support frame 6 are received with their foot support tube segments 44 in the coupling piece 24 in a linearly adjustable manner and by means of securing elements 29, 30 and 31 in the coupling piece 24 in a bore 47 (corresponding to the desired seat height) FIG. 6 ).
  • the bores 47 require a gradual seat height variation. A stepless adjustment is also conceivable, for example by clamping.
  • the coupling units 13 can be non-positively fastened to the foot support tube segments 44 of the left and right struts 7 and 8. This enables the coupling units 13 to be precisely aligned with the bores 47 and facilitates the placement and assembly of the connecting elements 29, 30 and 31.
  • a stable connection between the base frame 2 and the seat foot support frame 6 must be established in their rear area by means of frame connectors 11 and 12. This can be achieved in a variety of ways, for example by means of telescopic pipe connections or by struts that can be attached with different distances between and on the base frame 2 and seat-footrest frame 6.
  • the frame connectors 11 and 12 are designed as plates which are firmly screwed to the rear axle 5 by means of connecting elements 36.
  • This frame connector 11 and 12 can thus consist of a different material than the rear axle 5, for example made of carbon.
  • the frame connectors 11 and 12 preferably run approximately concentrically with the rear wheels 16 with their upper contour. As such, they can simultaneously serve as clothing protection against the spoke wheels and accommodate a back frame construction. They each have an elongated hole 48 (here slightly curved) which runs from slightly above the rear axle 5 to the top at an angle.
  • elongated holes 48 correspond to elongated holes 46 in the seat tube segments 45 of the left and right struts 7 and 8 and, depending on the setting of the seat angle, seat height and wheelbase (position of the rear axle 5), form an intersection at a different position with respect to both elongated holes.
  • the left strut 7 with the frame connector 11 and the right strut 8 are made by means of clamping clamps 38 which are guided in the area and along the elongated holes 46 in the seat tube segments 45 of the left and right struts 7 and 8 and the clamping disks 40 and the connecting elements 39 and 41 jammed with the frame connector 12 and thus ultimately give stability to the entire frame structure.
  • One camber adapter 35 (6 ° in the present case) is connected to the rear axle 5 and the frame connector 11 or to the rear axle 5 and the frame connector 12 in a fixed position - without the need to readjust the track when adjusting the seat angle.
  • an additional cross strut 10 consisting of cross strut tube 37 and cross strut couplings 49, is installed. It is received by the left and right struts 7 and 8 in the cross strut couplings 49 and the cross bores 50 of the cross strut couplings 49 are aligned with the respective intersections of the elongated holes 46 and 48. In this position is the cross strut 10 together with the frame connectors 11 and 12 and the left and right struts 7 and 8 also and simultaneously clamped by means of clamping block 38, clamping washers 40 and the connecting elements 39 and 41.
  • the elongated holes 48 can be designed in a wide variety of forms. A preferred goal, however, is that the clamping clamps 38 travel as far as possible both in relation to the elongated holes 46 and the elongated holes 48 when the seat angle and seat height are adjusted, and thus produce the highest possible frictional resistance.
  • the elongated holes have 48 grids ( FIG. 8 ).
  • this enables the exact same setting on the left and right side and, on the other hand, in addition to the frictional connection, also a secure positive connection between frame connectors 11 and 12 and the clamping washers 40.
  • FIG. 7 has the advantage of a stepless angle adjustment.
  • the shaft shoulders 51 of the clamping disks 40 are adapted to the respectively associated type of elongated hole.
  • FIGS 9 to 13 show a rigid frame according to the invention in an adaptable box-frame concept from the left side.
  • the left frame connector 11 is hidden so that the relative position of the elongated holes 46 and 48 and the cross strut 10 (and thus the clamping block 38) can be better represented.
  • FIG. 9 shows the rigid frame with a seat angle of 0 ° to the road, FIG. 10 with a seat angle of approx. 5 °.
  • FIG.11 shows the rigid frame with the setting of the maximum seat height, FIG.12 with a medium seat height and FIG. 13 with the lowest seat height; in all cases with a seat angle of 0 ° to the road.

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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)
  • Automatic Cycles, And Cycles In General (AREA)

Description

Die Erfindung betrifft einen Starr-Rahmen-Rollstuhl, der nach dem Box-Rahmen-Konzept gestaltet ist.The invention relates to a rigid frame wheelchair, which is designed according to the box frame concept.

Vor dem Hintergrund einer auf dem Rollstuhl sitzenden Person sind die nachfolgenden Spezifizierungen betreffend vorne, hinten, rechts, links, oben, unten und sagittal zu verstehen, bei Anordnung des Rollstuhl auf einer horizontalen Unterlage ferner die Spezifizierungen vertikal, horizontal und senkrecht.Against the background of a person sitting on the wheelchair, the following specifications regarding front, back, right, left, top, bottom and sagittal are to be understood, and if the wheelchair is arranged on a horizontal surface, the specifications are also vertical, horizontal and vertical.

Starr-Rahmen-Rollstühle sind aus dem Stand der Technik hinlänglich bekannt. Sie werden da eingesetzt, wo das Hauptaugenmerk auf geringes Gewicht, Steifigkeit und maximale Wendigkeit gelegt wird.Rigid-frame wheelchairs are well known from the prior art. They are used where the main focus is on low weight, rigidity and maximum maneuverability.

Sie sind sogenannte Aktivrollstühle mit bestimmten Einstellmöglichkeiten, bzw. individuellen Anpassungsmöglichkeiten für aktive (im Gegensatz zu passiven - durch Begleitperson geschobene) Nutzer und unterscheiden sich im Wesentlichen durch zwei Konzepte:
Das Offen-Rahmen-Konzept und das Box-Rahmen-Konzept.They are so-called active wheelchairs with certain setting options or individual adjustment options for active (as opposed to passive - pushed by an accompanying person) user and essentially differ in two concepts:
The open frame concept and the box frame concept.

Beim Offen-Rahmen-Konzept besteht der Rahmen (ohne Rückenrahmen) aus einem L-förmigen Sitz-Fußstützrahmen - mit Sitzrahmensegment und Fußstützrahmensegment - und einer, am Sitzrahmensegment verschweißten (individuellen Konstruktion) oder verstellbar befestigten (anpassbaren) Hinterachskonstruktion. Die Vorteile dieses Konzeptes liegen im geringen Gewicht und der platzsparenden Unterbringung (bei abgenommenen Hinterrädern/Antriebsrädern) für den Transport, da der L-förmige Rahmen wenig Platz beansprucht und gut zwischen anderen Packstücken im Kofferraum eingefügt werden kann.In the open frame concept, the frame (without a back frame) consists of an L-shaped seat foot support frame - with a seat frame segment and a foot support frame segment - And a, welded on the seat frame segment (individual construction) or adjustable (adjustable) rear axle construction. The advantages of this concept are the low weight and the space-saving accommodation (with the rear wheels / drive wheels removed) for transport, since the L-shaped frame takes up little space and can be easily inserted between other packages in the trunk.

Beispiele für ein Offen- Rahmen-Konzept sind nachfolgend aufgeführte Rollstühle:

  • Helium Pro von der Firma Sunrise Medical, als individuelle (verschweißte) Variante http://www.sunrisemedical.de/rollstuehle/sopur/adaptivrollstuhl-helium
  • Argon von der Firma Sunrise Medical als anpassbare Variante http://www.sunrisemedical.de/rollstuehle/sopur/aktivrollstuhl-argon-2
  • ZR von der Firma Permobil als individuelle (verschweißte) Variante https://permobilus.com/product/zr/
  • ZRA von der Firma Permobil als anpassbare Variante https://permobilus.com/product/zra/
Examples of an open frame concept are the following wheelchairs:
  • Helium Pro from Sunrise Medical, as an individual (welded) variant http://www.sunrisemedical.de/rollstuehle/sopur/adaptivrollstuhl-helium
  • Argon from Sunrise Medical as a customizable variant http://www.sunrisemedical.de/rollstuehle/sopur/aktivrollstuhl-argon-2
  • ZR from Permobil as an individual (welded) variant https://permobilus.com/product/zr/
  • ZRA from Permobil as an adaptable variant https://permobilus.com/product/zra/

Beim Box-Rahmen-Konzept gibt es eine zusätzliche Rahmenverbindung von der Hinterachse zum Fußstützrahmensegment im Bereich der Lenkräder. Alle Rahmenteile sind starr miteinander verbunden.In the box-frame concept, there is an additional frame connection from the rear axle to the footrest frame segment in the area of the steering wheels. All frame parts are rigidly connected to each other.

Der Vorteil dieses Konzepts liegt in der höheren Steifigkeit im Vergleich zum Offen-Rahmen-Konzept.The advantage of this concept is the higher rigidity compared to the open frame concept.

Beispiele für ein Box-Rahmen-Konzept sind nachfolgend aufgeführte Rollstühle:

  • Easy Life R von der Firma Sunrise Medical http://www.sunrisemedical.de/rollstuehle/sopur/starrrahmen-rollstuhl-easylife-r
  • TR von der Firma Permobil als individuelle (verschweißte) Variante mit festgelegter Sitzhöhe und festgelegtem Sitzwinkel, jedoch mit längsverstellbarer Hinterachse zur Einstellung des Aktivgrades. https://permobilus.com/product/tr/
  • TRA von der Firma Permobil als anpassbare (Sitzhöhe, Sitzwinkel, Aktivgrad) Variante https://permobilus.com/product/tra/
  • SPEEDY 4TEEN von der Firma PROACTIV als anpassbare (Sitzhöhe, Sitzwinkel, Aktivgrad) Variante http://www.proactiv-gmbh.de/jugendrollstuhl speedy4teen.html
Examples of a box-frame concept are the following wheelchairs:
  • Easy Life R from Sunrise Medical http://www.sunrisemedical.de/rollstuehle/sopur/starrrahmen-rollstuhl-easylife-r
  • TR from Permobil as an individual (welded) variant with a fixed seat height and seat angle, but with a longitudinally adjustable rear axle to adjust the degree of activity. https://permobilus.com/product/tr/
  • TRA from Permobil as an adaptable (seat height, seat angle, activity level) variant https://permobilus.com/product/tra/
  • SPEEDY 4TEEN from PROACTIV as an adaptable (seat height, seat angle, activity level) variant http://www.proactiv-gmbh.de/jugendrollstuhl speedy4teen.html

Bei der anpassbaren Variante sind die Lenkgabeln winkeleinstellbar am Rahmen befestigt, so dass deren Drehachse unabhängig vom eingestellten Sitzwinkel immer zur Senkrechten bzw. Vertikalen ausgerichtet werden können. Dies ist zur Vermeidung von "Flattern" der Lenkräder unabdingbar. Zur Einstellung des Sitzwinkels (oder auch der hinteren Sitzhöhe) wird der Abstand der Hinterachse zum Sitzrohr verstellt. Je näher die Hinterachse zum Sitzrohr positioniert wird, desto größer wird der Sitzwinkel bei gegebener Sitzhöhe. Für den Einbau von Hinterrädern mit Sturz ist der Sturzadapter drehbar im Hinterachsrohr oder in der Hinterradaufnahme eingebaut. Dies ermöglicht die Spureinstellung der Hinterräder bei Veränderung des Sitzwinkels. Auch die Spureinstellung ist unabdingbar für einen reibungsarmen Lauf der Hinterräder.In the adjustable variant, the steering forks are attached to the frame so that they can be adjusted so that their axis of rotation can always be aligned with the vertical or vertical regardless of the seat angle set. This is essential to avoid "fluttering" of the steering wheels. The distance between the rear axle and the seat tube is adjusted to adjust the seat angle (or the rear seat height). The closer the rear axle is to the seat tube, the greater the seat angle for a given seat height. For the installation of rear wheels with camber, the camber adapter is rotatably installed in the rear axle tube or in the rear wheel holder. This enables the rear wheels to be adjusted when changing the seat angle. The toe adjustment is also essential for a smooth running of the rear wheels.

Die folgenden Ausführungen beziehen sich auf das Box-Rahmen-Konzept, insbesondere mit anpassbarem Rahmen, wie z.B. der TRA von Permobil, oder SPEEDY 4TEEN von PROACTIV.The following explanations relate to the box frame concept, in particular with an adjustable frame, such as the TRA by Permobil, or SPEEDY 4TEEN by PROACTIV.

Abgesehen von Sitzbreite und Sitztiefe sind die wesentlichen Anpass-/Einstellparameter eines Aktivrollstuhles:

  • Die Sitzhöhe
  • Der Sitzwinkel
  • Der Aktivgrad, oder auch Schwerpunkt
Hier ist die relative Lage - aus lateraler Sicht - der Hinterachse (Antriebsräder) zum Rücken gemeint.Apart from the seat width and seat depth, the main adjustment / setting parameters of an active wheelchair are:
  • The seat height
  • The seat angle
  • The degree of activity, or focus
Here the relative position - from a lateral point of view - of the rear axle (drive wheels) to the back is meant.

Je weiter die Hinterachse vom Rücken weg nach vorne - in Fahrtrichtung - positioniert ist, umso aktiver ist die Einstellung, bzw. umso näher liegt sie unterhalb des Schwerpunktes des Systems Rollstuhl/Nutzer. Der Rollstuhl wird damit sehr wendig, allerdings erhöht sich in gleichem Maße die Kippgefahr. Eine sehr aktive Einstellung ist nur versierten Fahrern vorbehalten.The further the rear axle is positioned from the back to the front - in the direction of travel - the more active the setting or the closer it is below the center of gravity of the wheelchair / user system. This makes the wheelchair very manoeuvrable, but the risk of tipping increases to the same extent. A very active setting is reserved only for experienced drivers.

Je näher die Hinterachse zum oder sogar hinter dem Rücken positioniert ist, umso kippstabiler ist der Rollstuhl, aber umso schwerfälliger lässt er sich bewegen.The closer the rear axle is to or even behind the back, the more stable the wheelchair is, but the more cumbersome it is to move.

Näher betrachtet werden soll die Anpassung von Sitzhöhe und Sitzwinkel bei vorgenanntem Box-Rahmen-Konzept in anpassbarer Variante.The adjustment of seat height and seat angle in the aforementioned box-frame concept in an adaptable variant should be considered in more detail.

Zur groben Anpassung an verschiedene Körpergrößen bieten die meisten Hersteller 3-4 Rahmengrößen an. Die Einstellung der exakten Sitzhöhe (bei gegebener Rahmengröße) erfolgt durch die Wahl verschieden hoher Lenkgabeln, sowie durch die unterschiedliche Höhenpositionierung der Lenkräder in den Lenkgabeln, die Einstellung des Sitzwinkels (oder hintere Sitzhöhe) durch die Einstellung des Abstandes der Hinterachse zum Sitzrahmen.Most manufacturers offer 3-4 frame sizes for rough adaptation to different body sizes. The exact seat height (for a given frame size) is set by choosing different height steering forks, as well as by the different height positioning of the steering wheels in the steering forks, the setting of the seat angle (or rear seat height) by adjusting the distance between the rear axle and the seat frame.

Folgende Nachteile müssen bei diesem Konzept in Kauf genommen werden:

  • Die Notwendigkeit des Einsatzes verschieden hoher Lenkgabeln erhöht den Lagerbestand bei Herstellern und Fachgeschäften.
  • Bei einer nachträglichen Sizhöhenanpassung müssen u.U. neue Lenkgabeln besorgt und neu eingebaut werden.
  • Bei einer Verstellung des Sitzwinkels (durch Versetzen der Hinterachse) müssen die Lenkgabeln neu zur Senkrechten justiert werden. Sind die Hinterräder mit Sturz eingebaut (wie in den meisten Fällen), muss deren Spur neu eingestellt werden, andernfalls erzeugen sie eine hohe Reibung und Reifenverschleiß.
The following disadvantages have to be accepted with this concept:
  • The need to use steering forks of different heights increases the inventory at manufacturers and specialty shops.
  • In the event of a subsequent height adjustment, new steering forks may need to be procured and reinstalled.
  • If the seat angle is adjusted (by moving the rear axle), the steering forks must be readjusted to the vertical. If the rear wheels are installed with a camber (as in most cases), their track must readjusted, otherwise they generate high friction and tire wear.

Aus der US 6 264 225 B1 ist ein Starr-Rahmen-Rollstuhl in anpassbarem Box-Rahmen-Konzept bekannt, welcher die Merkmale des Oberbegriffs des Patentanspruchs 1 aufweist.From the US 6 264 225 B1 a rigid-frame wheelchair in an adaptable box-frame concept is known, which has the features of the preamble of claim 1.

Weiteren Stand der Technik bilden die US 5 727 802 A und die WO 2005/067857 A1 .Another state of the art are the US 5 727 802 A and the WO 2005/067857 A1 .

Aufgabe der vorliegenden Erfindung ist es, einen Starr-Rahmen-Rollstuhl in anpassbarem Box-Rahmen-Konzept, der die Merkmale des Oberbegriffs des Patentanspruchs 1 aufweist, derart weiterzubilden, dass bei diesem die Einstellung von Sitzhöhe und Sitzwinkel mit weniger Materialeinsatz und geringerem Arbeitsaufwand zu bewerkstelligen ist.The object of the present invention is to develop a rigid-frame wheelchair in an adaptable box-frame concept, which has the features of the preamble of claim 1, in such a way that the adjustment of the seat height and seat angle with less use of material and less work increases is accomplished.

Gelöst wird die Aufgabe durch einen Starr-Rahmen-Rollstuhl der gemäß den Merkmalen des Patentanspruchs 1 ausgebildet ist. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.The object is achieved by a rigid frame wheelchair which is designed according to the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

Bei dem erfindungsgemäßen Starr-Rahmen-Rollstuhl wird die starre Form eines Box-Rahmens mit fest verschweißten Rahmenteilen aufgelöst und durch separate, gegeneinander verstellbare Rahmenteile ersetzt. Es wird ein Starr-Rahmen-Rollstuhl, der gemäß dem Box-Rahmen-Konzept gestaltet ist, mit folgenden Merkmalen vorgeschlagen:

  • einem Basisrahmen, der eine Hinterachse zur Aufnahme von Hinterrädern sowie eine linke Seitenstrebe und eine rechte Seitenstrebe zur Aufnahme von Lenkrädern in vorderen Bereichen der Seitenstreben aufweist,
  • einem L-förmigen Sitz-Fußstützrahmen, der eine L-förmige linke Strebe und eine L-förmige rechte Strebe aufweist, wobei die jeweilige Strebe ein Sitzrohrsegment und ein Fußstützrohrsegment aufweist, ferner der Sitz-Fußstützrahmen eine Querstrebe aufweist, die die Streben verbindet,
  • zwei Kupplungseinheiten, die den Basisrahmen im linken und rechten vorderen Bereich mit dem Sitz-Fußstützrahmen im Bereich dessen linker und rechter Fußstützrohrsegmente um eine Achse vertikal zu einer Sagittalebene für eine Winkeleinstellung gelenkig verbinden, und in denen die Fußstützrohrsegmente für eine Sitzhöhenverstellung verstellbar gelagert sind,
  • einem linken Rahmenverbinder und einem rechten Rahmenverbinder, wobei die Rahmenverbinder den Basisrahmen und die Sitzrohrsegmente fest miteinander verbinden, wobei die Sitzrohrsegmente in unterschiedlichen Positionen mit den Rahmenverbindern verbindbar sind.
In the rigid-frame wheelchair according to the invention, the rigid form of a box frame with permanently welded frame parts is dissolved and replaced by separate frame parts which can be adjusted relative to one another. A rigid frame wheelchair, which is designed in accordance with the box frame concept, is proposed with the following features:
  • a base frame which has a rear axle for receiving rear wheels and a left side strut and a right side strut for receiving steering wheels in front areas of the side struts,
  • an L-shaped seat foot support frame, which has an L-shaped left strut and an L-shaped right strut, the respective strut having a seat tube segment and a foot support tube segment, the seat foot support frame also having a cross strut which connects the struts,
  • two coupling units, which connect the base frame in the left and right front area to the seat foot support frame in the area of the left and right foot support tube segments in an articulated manner about an axis vertical to a sagittal plane for an angle adjustment, and in which the foot support tube segments are adjustably mounted for a seat height adjustment,
  • a left frame connector and a right frame connector, the frame connectors firmly connecting the base frame and the seat tube segments to one another, the seat tube segments being connectable to the frame connectors in different positions.

Der jeweilige Rahmenverbinder weist ein Langloch auf, das geneigt zu einem benachbarten Langloch des korrespondierenden Sitzrohrsegments angeordnet ist, sowie Mittel zum Festlegen von Rahmenverbindern und Sitzrohrsegment die Langlöcher durchsetzen, zum Festlegen von jeweiligem Rahmenverbinder und zugeordnetem Sitzrohrsegment in unterschiedlichen Positionen.The respective frame connector has an elongated hole, which is arranged inclined to an adjacent elongated hole of the corresponding seat tube segment, and means for fixing frame connectors and seat tube segment penetrating the elongated holes, for fixing the respective frame connector and associated seat tube segment in different positions.

Zur Erreichung einer höheren Stabilität wird es als vorteilhaft erachtet, eine zusätzliche auf dem Sitz-Fußstützrahmen im hinteren Bereich der Sitzrohrsegmente bewegliche Querstrebe einzubauen, an deren seitlichem linken und rechten Ende die linke und rechte Rahmenverbinder vorzugsweise befestigt werden.To achieve a higher stability, it is considered advantageous to install an additional cross strut movable on the seat foot support frame in the rear area of the seat tube segments, to the left and right ends of which the left and right frame connectors are preferably attached.

Da bei der so beschriebenen Konstruktion der Basisrahmen zur Fahrbahn immer die gleiche Lage (Abstand und Winkel) aufweist, bedarf es weder an den Lenkgabeln noch an den Hinterrädern fehleranfälliger Einstellarbeiten oder Austauschmaßnahmen. Sitzwinkel und Sitzhöhe werden alleine durch Verdrehung des Sitz-Fußstützrahmens mit den Kupplungseinheiten (Sitzwinkel), bzw. durch Verschieben in den Kupplungseinheiten (Sitzhöhe) und durch Fixieren der Sitzrohrsegmente an den linken und rechten Rahmenverbindern eingestellt. Insbesondere sind die Fußstützrohrsegmente in deren eingestellten Verschiebeposition fest mit den Kupplungseinheiten verbunden. Zusätzlich kann vorgesehen sein, die Gelenke nach erfolgter Winkeleinstellung der Fußstützrohrsegmente zu blockieren.Since in the construction described in this way the base frame always has the same position (distance and angle) with respect to the roadway, there is no need for adjustment work or replacement measures that are prone to errors on the steering forks or on the rear wheels. The seat angle and seat height are set solely by turning the seat foot support frame with the coupling units (seat angle), or by moving the coupling units (seat height) and by fixing the seat tube segments to the left and right frame connectors. In particular, the foot support tube segments are firmly connected to the coupling units in their adjusted displacement position. In addition, provision can be made to block the joints after the angle adjustment of the foot support tube segments.

Weitere Merkmale der Erfindung sind in den Unteransprüchen, der Beschreibung der Figuren und den Figuren selbst dargestellt, wobei bemerkt wird, dass alle Einzelmerkmale und alle Kombinationen von Einzelmerkmalen weitere erfinderische Ausgestaltungen darstellen.Further features of the invention are illustrated in the subclaims, the description of the figures and the figures themselves, it being noted that all individual features and all combinations of individual features represent further inventive developments.

In den Figuren ist die Erfindung anhand bevorzugter Ausführungsbeispiele erläutert, ohne hierauf beschränkt zu sein. Es zeigt:

FIG.1
in einer räumlichen Ansicht einen Rollstuhl ohne die der Aufnahme einer Person dienenden Sitz- und Rückenflächen,
FIG.2
in einer räumlichen Ansicht den Rollstuhl für einen Teilbereich, der im Wesentlichen den Basisrahmen, den Sitz-Fußstützrahmen, die Kupplungseinheiten und die Rahmenverbinder betrifft,
FIG.3
in einer räumlichen Ansicht den Bereich des Rollstuhls, der im Wesentlichen den Basisrahmen betrifft,
FIG.4
in einer räumlichen Ansicht den Bereich des Rollstuhls, der den SitzFußstützrahmen betrifft,
FIG.5
in einer räumlichen Darstellung gemäß FIG.2 die dortige Anordnung, allerdings in einer Explosionsdarstellung,
FIG.6
in einer Ansicht einen Teilbereich des Rollstuhls im Bereich der Anbindung von Basisrahmen und Sitz-Fußstützrahmen,
FIG.7
in einer Ansicht eine Ausbildung des jeweiligen Rahmenverbinders mit Langlöchern ohne Rasterungen,
FIG.8
in einer Ansicht eine Ausbildung des jeweiligen Rahmenverbinders mit Langlöchern mit Rasterungen,
FIG.9
den Starr-Rahmen von der linken Seite gesehen, bei ausgeblendetem linken Rahmenverbinder, veranschaulicht bei einer Einstellung des Starr-Rahmens mit einem Sitzwinkel von 0° gegenüber der Fahrbahn,
FIG.10
eine Darstellung gemäß FIG 9, veranschaulicht für einen Sitzwinkel von ca. 5° gegenüber der Fahrbahn,
FIG.11
den Starr-Rahmen mit einer Einstellung der maximalen Sitzhöhe, bei einem Sitzwinkel von 0° gegenüber der Fahrbahn,
FIG.12
den Starr-Rahmen gemäß FIG.11, bei einer mittleren Sitzhöhe, sowie einem Sitzwinkel von 0° gegenüber der Fahrbahn,
FIG.13
den Starr-Rahmen gemäß FIG.11, bei einer niedrigsten Sitzhöhe, sowie einem Sitzwinkel von 0° gegenüber der Fahrbahn.
In the figures, the invention is explained on the basis of preferred exemplary embodiments, without being limited thereto. It shows:
FIG. 1
in a spatial view a wheelchair without the seat and back surfaces serving to accommodate a person,
FIG. 2
in a spatial view the wheelchair for a partial area, which essentially relates to the base frame, the seat foot support frame, the coupling units and the frame connectors,
FIG. 3
in a spatial view the area of the wheelchair that essentially relates to the base frame,
FIG. 4
in a spatial view the area of the wheelchair that affects the seat foot support frame,
FIG. 5
in a spatial representation according to FIG. 2 the arrangement there, but in an exploded view,
FIG. 6
in a view a part of the wheelchair in the area of the connection of the base frame and seat-foot support frame,
FIG. 7
in one view, the formation of the respective frame connector with elongated holes without grids,
FIG. 8
in one view, training of the respective frame connector with elongated holes with grids,
FIG. 9
the rigid frame seen from the left, with the left frame connector hidden, illustrated when the rigid frame is set with a seat angle of 0 ° relative to the road,
FIG. 10
a representation according to FIG. 9 , illustrated for a seat angle of approx. 5 ° in relation to the road,
FIG.11
the rigid frame with an adjustment of the maximum seat height, with a seat angle of 0 ° to the road,
FIG.12
according to the rigid frame FIG.11 , with an average seat height and a seat angle of 0 ° to the road,
FIG. 13
according to the rigid frame FIG.11 , with a lowest seat height and a seat angle of 0 ° to the road.

FigurenbeschreibungFigure description

FIG.1 zeigt einen faltbaren Rollstuhl 1 ohne die der Aufnahme einer Person dienenden Sitz- und Rückenflächen. FIG. 1 shows a foldable wheelchair 1 without the seat and back surfaces serving to accommodate a person.

Der Rollstuhl 1 weist als wesentliche Bestandteile einen Basisrahmen 2, einen Sitz-Fußstützrahmen 6, eine Querstrebe 10, einen linken Rahmenverbinder 11 und einen rechten Rahmenverbinder 12, Kupplungseinheiten 13, einen Rückenrahmen 14, eine Fußstütze 15, Hinterräder 16, Vorderräder 17, eine linke Hinterradbremse 18 und eine rechte Hinterradbremse 19 sowie eine linke Radabdeckung 20 und eine rechte Radabdeckung 21 auf (FIG.1).The essential parts of the wheelchair 1 include a base frame 2, a seat foot support frame 6, a cross strut 10, a left frame connector 11 and a right frame connector 12, coupling units 13, a back frame 14, a footrest 15, rear wheels 16, front wheels 17, and a left one Rear brake 18 and a right rear brake 19 and a left wheel cover 20 and a right wheel cover 21 on ( FIG. 1 ).

Nachstehend wird auf die Darstellung der Figuren 2 bis 13 Bezug genommen, die die für die Durchführung der Sitzwinkel- und Sitzhöhenverstellung des Rollstuhls wesentlichen Bauteile des Rollstuhls bzw. deren Einzelkomponenten veranschaulichen.Below is the representation of the Figures 2 to 13 Reference, which illustrate the essential components of the wheelchair or their individual components for performing the seat angle and seat height adjustment of the wheelchair.

Der Basisrahmen 2 (FIG.3), bestehend aus linker Seitenstrebe 3, rechter Seitenstrebe 4 und Hinterachse 5, ist mittels Kupplungseinheiten 13, jeweils bestehend aus (FIG.5) Kupplungsstück 24, Klemmelement 25 sowie Verbindungselementen 26, 27, 28, 29, 30 und 31 mit dem Sitz-Fußstützrahmen 6 um eine Achse vertikal zur Sagittalebene gelenkig verbunden (FIG.2). Die hier dargestellte Ausführungsform des Basisrahmens 2 stellt nur eine Ausführungsmöglichkeit dar. So könnten insbesondere die Seitenstreben 3 und 4 z.B. auch so ausgeführt sein, dass sie aus jeweils einem Rohrbiegeteil bestehen, dessen vorderer Rohrabschnitt senkrecht zur Sagittalebene steht und die Kupplungseinheit 13 direkt drehbar und klemmbar aufnimmt. Separate Lenkgabelaufnahmen könnten an geeigneten Rohrabschnitten befestigt werden.The base frame 2 ( FIG. 3 ), consisting of left side strut 3, right side strut 4 and rear axle 5, is by means of coupling units 13, each consisting of ( FIG. 5 ) Coupling piece 24, clamping element 25 and connecting elements 26, 27, 28, 29, 30 and 31 with the seat foot support frame 6 articulated about an axis vertical to the sagittal plane ( FIG. 2 ). The embodiment of the base frame 2 shown here represents only one possible embodiment. In particular, the side struts 3 and 4 could, for example, also be designed such that they each consist of a tube bent part, the front tube section of which is perpendicular to the sagittal plane and the coupling unit 13 can be rotated and clamped directly records. Separate steering fork mounts could be attached to suitable pipe sections.

Die Hinterachse 5 in der hier dargestellten Ausführung ist zur Verstellbarkeit des Radstandes auf den Streben 3 und 4 verschiebbar und wird durch Klemmen festgesetzt. Sie könnte aber beispielsweise auch direkt mit den Seitenstreben 3 und 4 fest verschweißt sein. Die Hinterachse 5 ist senkrecht zur Sagittalebene angeordnet.The rear axle 5 in the embodiment shown here is displaceable on the struts 3 and 4 to adjust the wheelbase and is fixed by clamping. But it could also be welded directly to the side struts 3 and 4, for example. The rear axle 5 is arranged perpendicular to the sagittal plane.

Bei der beschriebenen Ausführungsform (FIG.3) bestehen die linke Seitenstrebe 3 und rechte Seitenstrebe 4 jeweils aus einem Strebenrohr 22 und einem Multifunktionsteil 23, das jeweils mit dem Strebenrohr 22 fest verbunden (z.B. verschweißt) ist. Das Multifunktionsteil 23 erfüllt im Wesentlichen drei Funktionen:

  • Die Aufnahme von Lagersitzen für die Lenkgabel 52 eines Vorderrades 17
  • Die Aufnahme von einem Stoßschutz 32 (FIG.5)
  • Die Lagerung der Kupplungseinheit 13
In the described embodiment ( FIG. 3 ) the left side strut 3 and right side strut 4 each consist of a strut tube 22 and a multifunctional part 23, which is firmly connected to the strut tube 22 (for example, welded). The multifunction part 23 essentially fulfills three functions:
  • The inclusion of bearing seats for the steering fork 52 of a front wheel 17
  • The inclusion of a shock protection 32 ( FIG. 5 )
  • The bearing of the clutch unit 13

Zur drehbaren und formschlüssigen Lagerung der Kupplungseinheiten 13 weisen die Multifunktionsteile 23 an ihrer zur Sagittalebene hin gerichteten Seite jeweils ein Sackloch 42 auf (FIG.3), das mit einem Stummelansatz 43 (FIG.5) des jeweiligen Kupplungsstückes 24 korrespondiert. Die Achse des Sackloches steht senkrecht zur Sagittalebene. Die Kupplungseinheiten 13 werden jeweils mittels Verbindungselementen 33 und 34 mit den Seitenstreben 3 und 4 an den Multifunktionsteilen 23 verschraubt.For the rotatable and form-fitting mounting of the coupling units 13, the multifunction parts 23 each have a blind hole 42 on their side facing the sagittal plane ( FIG. 3 ) with a stub 43 ( FIG. 5 ) of the respective coupling piece 24 corresponds. The axis of the blind hole is perpendicular to the sagittal plane. The coupling units 13 are each screwed to the side struts 3 and 4 on the multifunction parts 23 by means of connecting elements 33 and 34.

Linke und rechte Strebe 7 und 8 des Sitz-Fußstützrahmen 6 werden mit ihren Fußstützrohrsegmenten 44 im Kupplungsstück 24 linear verstellbar aufgenommen und mittels Sicherungselementen 29, 30 und 31 im Kupplungsstück 24 in einer, für die gewünschte Sitzhöhe entsprechenden, Bohrung 47 (FIG.6) festgesetzt. Die Bohrungen 47 bedingen eine stufenweise Sitzhöhenvariation. Denkbar ist aber auch eine stufenlose Einstellung, durch z.B. Klemmung.The left and right struts 7 and 8 of the seat foot support frame 6 are received with their foot support tube segments 44 in the coupling piece 24 in a linearly adjustable manner and by means of securing elements 29, 30 and 31 in the coupling piece 24 in a bore 47 (corresponding to the desired seat height) FIG. 6 ). The bores 47 require a gradual seat height variation. A stepless adjustment is also conceivable, for example by clamping.

Mittels Klemmelement 25 und den Verbindungselementen 26, 27 und 28 können die Kupplungseinheiten 13 kraftschlüssig an den Fußstützrohrsegmenten 44 der linken und rechten Streben 7 und 8 befestigt werden. Dies ermöglicht die genaue Ausrichtung der Kupplungseinheiten 13 auf die Bohrungen 47 und erleichtert die Platzierung und Montage der Verbindungselemente 29, 30 und 31.By means of the clamping element 25 and the connecting elements 26, 27 and 28, the coupling units 13 can be non-positively fastened to the foot support tube segments 44 of the left and right struts 7 and 8. This enables the coupling units 13 to be precisely aligned with the bores 47 and facilitates the placement and assembly of the connecting elements 29, 30 and 31.

Nach vorstehend beschriebener Festlegung von Sitzwinkel und Sitzhöhe muss mittels Rahmenverbinder 11 und 12 eine stabile Verbindung zwischen Basisrahmen 2 und Sitz-Fußstützrahmen 6 in deren jeweils hinteren Bereich hergestellt werden. Dies kann auf vielfältige Weise realisiert werden, z.B. durch teleskopische Rohrverbindungen oder durch Streben, die mit unterschiedlichen Abständen zwischen und an Basisrahmen 2 und Sitz-Fußstützrahmen 6 befestigt werden können.After the above-described determination of the seat angle and seat height, a stable connection between the base frame 2 and the seat foot support frame 6 must be established in their rear area by means of frame connectors 11 and 12. This can be achieved in a variety of ways, for example by means of telescopic pipe connections or by struts that can be attached with different distances between and on the base frame 2 and seat-footrest frame 6.

In einer bevorzugten Form sind die Rahmenverbinder 11 und 12 als Platten ausgebildet, die mittels Verbindungselementen 36 mit der Hinterachse 5 fest verschraubt sind. Diese Rahmenverbinder 11 und 12 können damit aus einem anderen Material bestehen als die Hinterachse 5, zum Beispiel aus Karbon. Die Rahmenverbinder 11 und 12 verlaufen mit ihrer oberen Kontur vorzugsweise in etwa konzentrisch zu den Hinterrädern 16. Sie können als solche gleichzeitig als Kleiderschutz gegenüber den Speichenrädern dienen und eine Rückenrahmenkonstruktion aufnehmen. Sie weisen jeweils ein Langloch 48 (hier leicht gekrümmt) auf, das von etwas oberhalb der Hinterachse 5 nach schräg vorn oben verläuft. Diese Langlöcher 48 korrespondieren mit Langlöchern 46 in den Sitzrohrsegmenten 45 der linken und rechten Strebe 7 und 8 und bilden mit diesen je nach Einstellung von Sitzwinkel, Sitzhöhe und Radstand (Position der Hinterachse 5) einen Schnittpunkt an unterschiedlicher Position bezüglich beider Langlöcher. Mittels Klemmkloben 38, die im Bereich und entlang der Langlöcher 46 in den Sitzrohrsegmenten 45 der linken und rechten Strebe 7 und 8 geführt werden und den Klemmscheiben 40 sowie den Verbindungselementen 39 und 41 werden die linke Strebe 7 mit dem Rahmenverbinder 11 und die rechte Strebe 8 mit dem Rahmenverbinder 12 verklemmt und verleihen so der gesamten Rahmenkonstruktion letztlich Stabilität.In a preferred form, the frame connectors 11 and 12 are designed as plates which are firmly screwed to the rear axle 5 by means of connecting elements 36. This frame connector 11 and 12 can thus consist of a different material than the rear axle 5, for example made of carbon. The frame connectors 11 and 12 preferably run approximately concentrically with the rear wheels 16 with their upper contour. As such, they can simultaneously serve as clothing protection against the spoke wheels and accommodate a back frame construction. They each have an elongated hole 48 (here slightly curved) which runs from slightly above the rear axle 5 to the top at an angle. These elongated holes 48 correspond to elongated holes 46 in the seat tube segments 45 of the left and right struts 7 and 8 and, depending on the setting of the seat angle, seat height and wheelbase (position of the rear axle 5), form an intersection at a different position with respect to both elongated holes. The left strut 7 with the frame connector 11 and the right strut 8 are made by means of clamping clamps 38 which are guided in the area and along the elongated holes 46 in the seat tube segments 45 of the left and right struts 7 and 8 and the clamping disks 40 and the connecting elements 39 and 41 jammed with the frame connector 12 and thus ultimately give stability to the entire frame structure.

Jeweils ein Sturzadapter 35 (vorliegend 6°) ist mit der Hinterachse 5 und dem Rahmenverbinder 11 bzw. mit der Hinterachse 5 und dem Rahmenverbinder 12 in festgelegter Position - ohne die Notwendigkeit einer Nachjustierung der Spur bei Sitzwinkelverstellung - verbunden.One camber adapter 35 (6 ° in the present case) is connected to the rear axle 5 and the frame connector 11 or to the rear axle 5 and the frame connector 12 in a fixed position - without the need to readjust the track when adjusting the seat angle.

In einer bevorzugten Ausführung wird eine zusätzliche Querstrebe 10, bestehend aus Querstrebenrohr 37 und Querstrebenkupplungen 49, eingebaut. Sie wird von den linken und rechten Strebe 7 und 8 in den Querstrebenkupplungen 49 aufgenommen und die Querbohrungen 50 der Querstrebenkupplungen 49 mit den jeweiligen Schnittpunkten der Langlöcher 46 und 48 in Deckung gebracht. In dieser Position wird die Querstrebe 10 zusammen mit den Rahmenverbindern 11 und 12 sowie der linken und rechten Streben 7 und 8 ebenfalls und gleichzeitig mittels Klemmkloben 38, Klemmscheiben 40 sowie den Verbindungselementen 39 und 41 verklemmt.In a preferred embodiment, an additional cross strut 10, consisting of cross strut tube 37 and cross strut couplings 49, is installed. It is received by the left and right struts 7 and 8 in the cross strut couplings 49 and the cross bores 50 of the cross strut couplings 49 are aligned with the respective intersections of the elongated holes 46 and 48. In this position is the cross strut 10 together with the frame connectors 11 and 12 and the left and right struts 7 and 8 also and simultaneously clamped by means of clamping block 38, clamping washers 40 and the connecting elements 39 and 41.

Die Langlöcher 48 können in unterschiedlichster Form ausgebildet sein. Ein bevorzugtes Ziel ist es aber, dass die Klemmkloben 38 bei Verstellung von Sitzwinkel und Sitzhöhe einen möglichst weiten Weg sowohl in Bezug auf die Langlöcher 46, als auch der Langlöcher 48 zurücklegen und somit einen möglichst hohen Reibwiderstand erzeugen.The elongated holes 48 can be designed in a wide variety of forms. A preferred goal, however, is that the clamping clamps 38 travel as far as possible both in relation to the elongated holes 46 and the elongated holes 48 when the seat angle and seat height are adjusted, and thus produce the highest possible frictional resistance.

In einer besonderen Form weisen die Langlöcher 48 Rasterungen auf (FIG.8). Dies ermöglicht einerseits die exakt gleiche Einstellung auf linker und rechter Seite und andererseits neben dem Kraftschluss auch einen sicheren Formschluss zwischen Rahmenverbindern 11 und 12 und den Klemmscheiben 40. Das Langloch ohne Rasterung (FIG.7) hat den Vorteil einer stufenlosen Winkelverstellung. Die Wellenabsätze 51 der Klemmscheiben 40 sind an den jeweilig zugehörigen Langlochtyp angepasst.In a special shape, the elongated holes have 48 grids ( FIG. 8 ). On the one hand, this enables the exact same setting on the left and right side and, on the other hand, in addition to the frictional connection, also a secure positive connection between frame connectors 11 and 12 and the clamping washers 40. FIG. 7 ) has the advantage of a stepless angle adjustment. The shaft shoulders 51 of the clamping disks 40 are adapted to the respectively associated type of elongated hole.

Die Figuren 9 bis 13 zeigen einen erfindungsgemäßen Starr-Rahmen in anpassbarem Box-Rahmen-Konzept von der linken Seite. Dabei ist der linke Rahmenverbinder 11 ausgeblendet, um die relative Lage der Langlöcher 46 und 48 sowie der Querstrebe 10 (und damit des Klemmkloben 38) besser darstellen zu können.The Figures 9 to 13 show a rigid frame according to the invention in an adaptable box-frame concept from the left side. The left frame connector 11 is hidden so that the relative position of the elongated holes 46 and 48 and the cross strut 10 (and thus the clamping block 38) can be better represented.

FIG.9 zeigt den Starr-Rahmen mit einem Sitzwinkel von 0° gegenüber der Fahrbahn, FIG.10 mit einem Sitzwinkel von ca. 5°. FIG. 9 shows the rigid frame with a seat angle of 0 ° to the road, FIG. 10 with a seat angle of approx. 5 °.

FIG.11 zeigt den Starr-Rahmen mit der Einstellung der maximalen Sitzhöhe, FIG.12 mit einer mittleren Sitzhöhe und FIG.13 mit der niedrigsten Sitzhöhe; in allen Fällen bei einem Sitzwinkel von 0° gegenüber der Fahrbahn. FIG.11 shows the rigid frame with the setting of the maximum seat height, FIG.12 with a medium seat height and FIG. 13 with the lowest seat height; in all cases with a seat angle of 0 ° to the road.

BezugszeichenlisteReference list

11
Falltbarer RollstuhlFallable wheelchair
22nd
BasisrahmenBase frame
33rd
Linke SeitenstrebeLeft side strut
44th
Rechte SeitenstrebeRight side strut
55
HinterachseRear axle
66
Sitz-FußstützrahmenSeat foot support frame
77
linke Strebeleft strut
88th
rechte Streberight strut
99
QuerstrebeCross strut
1010th
QuerstrebeCross strut
1111
linker Rahmenverbinderleft frame connector
1212th
rechter Rahmenverbinderright frame connector
1313
KupplungseinheitClutch unit
1414
RückenrahmenBack frame
1515
FußstützeFootrest
1616
HinterradRear wheel
1717th
VorderradFront wheel
1818th
linke Hinterradbremseleft rear brake
1919th
rechte Hinterradbremseright rear brake
2020
linke Radabdeckungleft wheel cover
2121
rechte Radabdeckungright wheel cover
2222
StrebenrohrStrut tube
2323
MultifunktionsteilMultifunction part
2424th
KupplungsstückCoupling piece
2525th
KlemmelementClamping element
2626
VerbindungselementFastener
2727
VerbindungselementFastener
2828
VerbindungselementFastener
2929
Verbindungselement/SicherungselementConnection element / securing element
3030th
Verbindungselement/SicherungselementConnection element / securing element
3131
Verbindungselement/SicherungselementConnection element / securing element
3232
StoßschutzShock protection
3333
VerbindungselementFastener
3434
VerbindungselementFastener
3535
SturzadapterLintel adapter
3636
VerbindungselementFastener
3737
QuerstrebenrohrCross strut tube
3838
KlemmklobenClamp
3939
VerbindungselementFastener
4040
KlemmscheibeClamping disc
4141
Verbindungselement/SicherungselementConnection element / securing element
4242
SacklochBlind hole
4343
StummelansatzStub
4444
FußstützrohrsegmentFootrest tube segment
4545
SitzrohrsegmentSeat tube segment
4646
LanglochLong hole
4747
Bohrungdrilling
4848
LanglochLong hole
4949
QuerstrebenkupplungCross strut coupling
5050
QuerbohrungCross hole
5151
WellenabsatzShaft shoulder
5252
LenkgabelSteering fork

Claims (12)

  1. Rigid-frame wheelchair (1) which is designed according to a box frame design, having the following features:
    - a base frame (2), which has a rear axle (5) for receiving rear wheels (16) and a left-hand side strut (3) and a right-hand side strut (4) for receiving steering wheels (17) in the front regions of the side struts (3, 4),
    - an L-shaped seat-foot support frame (6), which has an L-shaped left-hand strut (7) and an L-shaped right-hand strut (8), wherein the respective struts (7 and 8, respectively) have a seat tube segment (45) and a foot support tube segment (44), and the seat-foot support frame (6) furthermore has a transverse strut (9) that connects the struts (7, 8),
    - two coupling units (13), which connect the base frame (2) in the left-hand and right-hand front region to the seat-foot support frame (6) in the region of the left-hand and right-hand foot support tube segments (44) thereof in an articulated manner about an axis vertically to a sagittal plane for an angular adjustment, and in which the foot support tube segments (44) are adjustably mounted for seat height adjustment,
    - a left-hand frame connector (11) and a right-hand frame connector (12), wherein the frame connectors (11, 12) connect the base frame (2) and the seat tube segments (45) fixedly together, wherein the seat tube segments (45) are able to be connected to the frame connectors (11, 12) in various positions,
    characterized in that the respective frame connectors (11 and 12, respectively) have a slot (48) that is arranged in an inclined manner with respect to an adjacent slot (46) of the corresponding seat tube segment (45), and means (38, 39, 40, 41) for securing frame connectors (11 and 12, respectively) and the seat tube segment (45) pass through the slots (46, 48), in order to secure the respective frame connectors (11 and 12, respectively) and the associated seat tube segment (45) in various positions.
  2. Wheelchair according to Claim 1, characterized in that the foot support tube segments (44) are adjustable in a stepless or stepped manner in the coupling units (13).
  3. Wheelchair according to Claim 1 or 2, characterized in that the respective foot support tube segment (44) is mounted in a displaceable manner in a coupling piece (24), in the form of a sleeve, of the coupling unit (13) and is able to be secured relative to the coupling piece (24) by means of means (25 to 31), in particular clamping means.
  4. Wheelchair according to one of Claims 1 to 3, characterized in that the respective side strut (3, 4) has a strut tube (22) and a multifunctional part (23) connected fixedly thereto, wherein the respective multifunctional part (23) serves for receiving bearing seats for a steering fork (52) of a front wheel (17) and for supporting the coupling unit (13), preferably also for receiving an impact protection device (32).
  5. Wheelchair according to one of Claims 1 to 4, characterized in that the two frame connectors (11, 12) connect the base frame (2) and the seat tube segments (45) fixedly together in the respective rear regions thereof.
  6. Wheelchair according to one of Claims 1 to 5, characterized in that the seat tube segments (45) receive a further transverse strut (10) in a movable manner in their rear region, wherein this transverse strut (10) is connected to the frame connectors (11, 12) in the region of their remote ends.
  7. Wheelchair according to one of Claims 1 to 6, characterized in that the respective frame connectors (11, 12) are configured as plates that are arranged in particular parallel to the sagittal plane.
  8. Wheelchair according to one of Claims 1 to 7, characterized in that the respective frame connectors (11 and 12, respectively) are fixedly connected, in particular screwed, to the rear axle (5) by means of at least one connecting element (36).
  9. Wheelchair according to one of Claims 1 to 8, characterized in that the slot (48) of the frame connector (11 and 12, respectively) extends from above, in particular slightly above, the rear axle (5) obliquely upwardly to the front and/or the slot (46) of the seat tube segment (45) extends in the axial direction of the seat tube segment (45).
  10. Wheelchair according to one of Claims 1 to 9, characterized in that the slot (48) of the frame connector (11 and 12, respectively) is slightly curved and the slot (46) of the seat tube segment (45) is arranged in a straight manner, extending in the axial direction of the seat tube segment (45).
  11. Wheelchair according to one of Claims 1 to 10, characterized in that the frame connector (11 and 12, respectively) and the seat tube segments (45) are able to be connected together steplessly or at defined adjustment spacings.
  12. Wheelchair according to one of Claims 1 to 11, characterized in that the rear axle (5) is displaceable on the side struts (3, 4) for the adjustability of the wheelbase of the wheelchair (1) and is able to be secured relative to the side struts (3, 4) by way of means.
EP18167665.1A 2018-04-17 2018-04-17 Rigid frame wheelchair Active EP3556336B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18167665.1A EP3556336B1 (en) 2018-04-17 2018-04-17 Rigid frame wheelchair
US16/373,438 US11160702B2 (en) 2018-04-17 2019-04-02 Rigid frame wheelchair

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18167665.1A EP3556336B1 (en) 2018-04-17 2018-04-17 Rigid frame wheelchair

Publications (2)

Publication Number Publication Date
EP3556336A1 EP3556336A1 (en) 2019-10-23
EP3556336B1 true EP3556336B1 (en) 2020-08-05

Family

ID=62017189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18167665.1A Active EP3556336B1 (en) 2018-04-17 2018-04-17 Rigid frame wheelchair

Country Status (2)

Country Link
US (1) US11160702B2 (en)
EP (1) EP3556336B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10751235B2 (en) * 2017-04-14 2020-08-25 Chad Robert Ernst Adjustable camber wheelchair devices, systems and methods
USD943466S1 (en) * 2018-06-29 2022-02-15 TOPRO Industri AS Part of a rollator frame
CA188335S (en) * 2018-09-14 2020-06-17 Invacare Int Gmbh Wheelchair
US12005735B2 (en) * 2020-03-16 2024-06-11 United States Government As Represented By The Department Of Veterans Affairs Wheelchair for specialized sports applications
DE102021123806B4 (en) 2021-05-12 2024-08-22 Meyra Gmbh Folding frame for a wheelchair
EP4088705A1 (en) 2021-05-12 2022-11-16 Meyra GmbH Collapsible frame for a wheelchair

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Publication number Priority date Publication date Assignee Title
US5020816A (en) * 1987-10-19 1991-06-04 Mulholland Designs, Inc. Adjustable frame wheelchair
DE19525719B4 (en) * 1994-07-14 2004-08-26 Everest & Jennings International Ltd. Wheelchair and wheelchair frame with suspension
DE29901471U1 (en) * 1999-01-29 1999-07-22 Sopur Medizintechnik GmbH, 69254 Malsch Manually operated wheelchair
US6264225B1 (en) * 1999-06-14 2001-07-24 Sunrise Medical Hhg Inc. Adjustable side frame and wheelchair with adjustable side frame
US6241275B1 (en) * 1999-06-14 2001-06-05 Sunrise Medical Hhg Inc. Foldable wheelchair and link configuration for foldable wheelchair
DE10248624A1 (en) * 2002-10-18 2004-05-06 Sunrise Medical Gmbh Wheelchair with side ladder protection
WO2005067857A1 (en) * 2004-01-14 2005-07-28 Invacare Corporation Adjustable wheelchair
WO2006045316A1 (en) * 2004-10-29 2006-05-04 R82 A/S Comfort wheelchair
US7891696B2 (en) * 2008-06-17 2011-02-22 Hanson Wayne H Multifunctional foldable mobility base

Also Published As

Publication number Publication date
US11160702B2 (en) 2021-11-02
US20190314228A1 (en) 2019-10-17
EP3556336A1 (en) 2019-10-23

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