WO2021137710A1 - Device for helping wheelchair users to negotiate different surface levels and method for operating said device - Google Patents

Device for helping wheelchair users to negotiate different surface levels and method for operating said device Download PDF

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Publication number
WO2021137710A1
WO2021137710A1 PCT/PT2020/050047 PT2020050047W WO2021137710A1 WO 2021137710 A1 WO2021137710 A1 WO 2021137710A1 PT 2020050047 W PT2020050047 W PT 2020050047W WO 2021137710 A1 WO2021137710 A1 WO 2021137710A1
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WIPO (PCT)
Prior art keywords
wheels
wheelchair
brake
lever
axle
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PCT/PT2020/050047
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French (fr)
Portuguese (pt)
Inventor
Raquel Santos HENRIQUES
Ziga GLAVAN
Original Assignee
Instituto Superior Técnico
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Publication of WO2021137710A1 publication Critical patent/WO2021137710A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps
    • 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
    • A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps
    • A61G5/068—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps with extensible supports pushing upwards, e.g. telescopic legs

Definitions

  • the present invention refers to a device in the area of mobility and health, developed to facilitate the movement of wheelchair users in their daily lives.
  • the device allows the user in a wheelchair some independence, allowing them to overcome unevennesses, which present themselves as major obstacles in their daily lives, such as unevenness between the road and the sidewalk, a step, entry into a transport, between others.
  • the device needs to be easy and quick to use and lightweight. The device aims to provide the user with independence.
  • the present invention allows to assist the user of a wheelchair in overcoming small differences in floor height independently, comfortable, safe and efficient.
  • the device is coupled to the wheelchair through the rear axle (5), while the front axle (3) of the device is fixed through the front fixing system (2) to a front bar of the wheelchair.
  • This device comprises two parallel axes: the front axle (3) and the rear axle (5), connected by a perpendicular axis (4).
  • the front axle (3) is coupled with the handlebar bars (1) and a brake structure (9) with lever (10), and the rear axle (5) is connected to the set of wheels of the device, the front wheels (6 ) and the rear wheels (11).
  • the brake structure (9) will allow the user to move the wheelchair without holding the handlebar (1).
  • the large strain relief wheel (7) and the small nylon strain relief wheel (8) make it possible to transfer the movement effort from the large wheel of the wheelchair to the rear wheels (11) of the device.
  • the device for assisting wheelchair users to overcome unevenness comprises: a) handlebar(s) (1); b) fixation system (2); c) front axle (3); d) perpendicular axis (4); e) rear axle (5); f)front wheels (6); g) large force passage wheel (7); h)small force passage wheel (8); i) brake structure (9); j) lever (10); k) rear wheels (11).
  • the device is characterized by comprising: i. a lever structure, consisting of: a. handlebar(s) (1), with handles at the top end; B. front axle (3); ç. perpendicular axis (4), consisting of a major axis to which two minor axes are connected, one at each end. One of these axes will connect to the front axle (3) of the device and the other to the rear axle (5); d. rear axle (5); ii. a structure to fasten to the chair, consisting of the following components: a. fastening system (2) to the wheelchair b. rear axle (5) iii.
  • a brake mechanism consisting of the following components: a.brake structure (9); b.brake lever (10); iv. a mobility structure, consisting of the following components: a. front wheels (6) of the device; b.rear wheels (11) of the device; c. Large force passage wheel (7) for device wheel; d.small force passage wheel (8) of the wheelchair wheel.
  • the effort passing wheels are connected to the rest of the device through a section perpendicular to the structure that supports the front and rear wheels of the device (Fig. 6).
  • the effort passing wheels can be coupled on one side or the other, or even on both sides.
  • a device with two sets of effort passing wheels does not present advantages and implies a higher production cost.
  • the brake mechanism is activated by the user after he presses the brake lever (10) on one of the handlebars, which can be on the right or left side. This movement displaces the steel cable that makes the connection between the lever (10) and a metal part and lifts the metal part that fits in the grooves of the brake structure (9). Since, at that moment, the metal part is not in any of the grooves, but is suspended on the steel cable, it is possible to freely move the handlebars (1), forwards and backwards.
  • the front fixation system (2) attached to the bar descends from the two arms of the wheelchair (Fig. 5).
  • the structure consists of two components.
  • One component is semicircular horizontally, with a hole with a diameter greater than the front axis (3) of the device, so that it has freedom of movement and is coupled to the device, and on the other side of the axis is constituted by a straight plate perpendicular to the semicircle with two holes that allow it to be fixed using screws.
  • the other component is a vertical semicircle with a flat end with two holes (one on each side) for fastening using screws and nuts. This semicircle is larger in diameter than wheelchair bars, but it is tight so that there is no freedom of movement.
  • the metallic structure containing the three grooves is welded perpendicularly to the continuation of the semicircular component horizontally.
  • the rear axle (5) of the device allows the attachment of the device to the rear of the wheelchair, through the central hole where the large wheelchair wheels are attached, under the chair. To fasten said axle, remove the large wheels from the wheelchair, fit each end of the rear axle (5) in the respective central hole and then, when mounting the wheels of the wheelchair the device is attached to the wheelchair (Fig. 4).
  • the present invention refers to a device that allows its user to overcome unevenness, lifting the wheelchair safely and independently.
  • the device consists of a lever system to be coupled to the wheelchair through the rear axle (5), while the front axle (3) of the device is fixed through the front fixation system (2) on the bar that descends from the arms of the chair of wheels.
  • the wheelchair user must grip the handlebars (1) in the area of the handles and at the same time the brake lever (10). Then the user must push the handlebar (1) forwards in order to place the front wheels (6) of the device on the ground. Then the user must release the brake lever (10) to lock the position of the device wheels. At that moment, the wheelchair is supported on the front wheels (6) of the device and on the large wheels of the wheelchair. In this way the front wheels of the wheelchair are in the air over the top of the slope. The user must then unlock the brake lever (10) and pull the handlebar (1) towards the user, in order to place the rear wheels (11) of the device on the ground. This movement causes the wheelchair's rear wheels to lift. At that moment, the device position is locked again with the brake lever (10). The wheelchair moves with the front wheels of the wheelchair and the rear wheels (11) of the device.
  • the user When the rear wheels (11) of the device reach the unevenness threshold, the user must return to the position starting the device by pushing the handlebars (1) forward while depressing the brake lever (10). As soon as the four wheels of the device are in the air (the two front wheels (6) and the two rear wheels (11)), the device position is locked with the brake lever (10) and the unevenness can be set. as transposed and proceed with the usual displacement of the wheelchair.
  • Fig. 1 illustrates the device to assist wheelchairs to overcome unevenness, where the following are identified: handlebar(s) (1); fixation system (2); front axle (3); perpendicular axis (4); rear axle (5); front wheels (6); large effort passage wheel (7); small effort passage wheel (8); brake structure (9); lever (10) and rear wheels (11).
  • Fig. 2 illustrates the device coupled to the wheelchair, showing the location of the handlebars (1), the fixation system (2) in front of the wheelchair, the front wheels (6) of the device and the lever (10) of brake.
  • Fig. 3 shows in detail the brake mechanism that allows locking the position of the device's wheels, showing: front fastening system (2) expanded, where the vertical semicircular component (2a) with a flat end with two holes is observed (one on each side) for fastening using screws and nuts (2b) and a horizontal semicircular component (2c), and the brake system or structure (9).
  • Fig. 4 shows the rear connection of the device to the wheelchair, in which the following components are seen: rear axle (5); large force passage wheel (7) for device wheel; small push-through wheel (8) of the wheelchair wheel and rear wheels (11) of the device.
  • Fig. 5 represents the front connection of the device to the wheelchair, in which the fixation system (2) front to the wheelchair is seen.
  • Fig. 6 shows the detail of the force transfer mechanism between the rear wheel (11) of the device and the rear wheel of the wheelchair, through the large force transfer wheel (7) to the device wheel and the wheel small passage of effort (8) for the chair wheel.

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

Abstract

The present invention relates to a device that allows wheelchair users to negotiate different surface levels, such as a step, independently. The device consists in a lever structure that attaches to a wheelchair using the rear axle (5) and the fastening system (2). This device comprises two parallel axles, a front axle (3) and a rear axle (5), which are connected to each other by a perpendicular axle (4). The front wheels (6) and rear wheels (11) are attached to the rear axle (5). The handlebars (1) and a brake structure (9), which includes the brake lever (10), are connected to the front axle (3). The large transmission wheel (7) and small transmission wheel (8) allow the transmission of movement of the large wheelchair wheel to the rear wheels (11) of the device.

Description

DESCRIÇÃO DESCRIPTION
Dispositivo para o auxilio na transposição de desníveis por cadeiras de rodas e o seu método de funcionamento Device for assisting in the crossing of slopes by wheelchairs and its method of operation
Campo da invenção field of invention
Campo técnico em que a invenção se insere Technical field in which the invention is inserted
A presente invenção refere-se a um dispositivo da área de mobilidade e saúde, desenvolvido para facilitar a deslocação de utilizadores de cadeiras de rodas no seu dia a dia. The present invention refers to a device in the area of mobility and health, developed to facilitate the movement of wheelchair users in their daily lives.
Estado da técnica State of the art
O dispositivo possibilita ao utilizador em cadeira de rodas alguma independência, permitindo que o mesmo transponha desníveis, que se apresentam como grandes obstáculos no seu dia a dia, como por exemplo, desnível entre a estrada e o passeio, um degrau, entrada num transporte, entre outros. The device allows the user in a wheelchair some independence, allowing them to overcome unevennesses, which present themselves as major obstacles in their daily lives, such as unevenness between the road and the sidewalk, a step, entry into a transport, between others.
Para ultrapassar obstáculos é necessário levantar primeiro as rodas da frente da cadeira de rodas, andar em frente e depois levantar as rodas de trás. Para maior independência, o utilizador tem de efetuar os movimentos sem ajuda externa e sem prejudicar a principal funcionalidade da cadeira de rodas, ou seja, deslocar-se no dia a dia. Com este intuito, o dispositivo necessita de ser de fácil e rápida utilização e leve. O dispositivo tem como objetivo prover o utilizador de independência. To overcome obstacles it is necessary to lift the front wheels of the wheelchair first, walk forwards and then lift the rear wheels. For greater independence, the user must carry out the movements without external help and without harming the main functionality of the wheelchair, that is, moving around on a daily basis. For this purpose, the device needs to be easy and quick to use and lightweight. The device aims to provide the user with independence.
De acordo com o pedido de patente US3580591A, a cadeira de rodas com o seu utilizador tem de ser inclinada para trás, o que devido ao peso da própria cadeira e do utilizador, apresenta um risco de queda de costas elevado. USRE28256E e US3529688A mostram dois tipos de cadeiras de rodas que, conforme indicado pelos inventores, podem subir degraus e superar obstáculos. No entanto, estes dispositivos apresentam elevada complexidade e são dispendiosos, uma vez que são dispositivos que fazem parte integral das cadeiras de rodas e não são dispositivos que possam ser acoplados às cadeiras já existentes no mercado ou que o utilizador já possui. O dispositivo que se pretende proteger refere-se a um acessório simples, com baixo custo de produção e seguro, pois garante que não haja desequilíbrio do utilizador, e amovível, ou seja que pode ser fácil e rapidamente fixado a cadeiras de rodas já existentes no mercado. O facto de ser amovível permite que o dispositivo seja passível de produção industrial em grande escala e de fácil reparação. According to patent application US3580591A, the wheelchair with its user has to be tilted backwards, which due to the weight of the chair itself and the user, presents a high risk of falling on his back. USRE28256E and US3529688A show two types of wheelchairs that, as indicated by the inventors, can climb steps and overcome obstacles. However, these devices are highly complex and expensive, since they are devices that are an integral part of wheelchairs and are not devices that can be coupled to chairs already on the market or that the user already owns. The device to be protected refers to a simple accessory, with low production cost and safe, as it ensures that there is no imbalance of the user, and removable, that is, it can be easily and quickly attached to wheelchairs already in the Marketplace. The fact that it is removable allows the device to be capable of industrial production on a large scale and easy to repair.
Não foram encontradas soluções no mercado que permitam levantar a cadeira de rodas pelo utilizador com sucesso e em segurança. As soluções do mercado para vencer obstáculos passam pela utilização de rampas e pelo auxílio de outras pessoas. Um dos objetivos do dispositivo que se pretende proteger é que o mesmo possa ser utilizado pelo utilizador da cadeira de rodas de forma independente, sem necessidade de ajuda externa. A estabilidade e segurança são importantes, pois a elevação das rodas dianteiras da cadeira de rodas coloca-a em posição de desequilíbrio impedindo que o utilizador consiga ultrapassar obstáculos autonomamente e em segurança. No solutions have been found on the market that allow the user to lift the wheelchair successfully and safely. The market solutions to overcome obstacles include the use of ramps and the help of other people. One of the goals of the device that is intended to protect is that it can be used by the wheelchair user independently, without the need for external help. Stability and safety are important, as the elevation of the wheelchair's front wheels puts it in an unbalanced position, preventing the user from being able to independently and safely overcome obstacles.
Sumário da invenção Invention Summary
A presente invenção permite auxiliar o utilizador de uma cadeira de rodas na superação de pequenas diferenças de altura do piso de forma independente, confortável, segura e eficiente. The present invention allows to assist the user of a wheelchair in overcoming small differences in floor height independently, comfortable, safe and efficient.
O dispositivo é acoplado à cadeira de rodas através do eixo traseiro (5), enquanto o eixo frontal (3) do dispositivo é fixado através do sistema de fixação (2) dianteira a uma barra dianteira da cadeira de rodas. The device is coupled to the wheelchair through the rear axle (5), while the front axle (3) of the device is fixed through the front fixing system (2) to a front bar of the wheelchair.
Este dispositivo compreende dois eixos paralelos: o eixo frontal (3) e o eixo traseiro (5), ligados por um eixo perpendicular (4). Ao eixo frontal (3) estão acopladas as barras dos guiadores (1) e uma estrutura de travão (9) com manete (10), e ao eixo traseiro (5) está ligado o conjunto de rodas do dispositivo, as rodas dianteiras (6) e as rodas traseiras (11). A estrutura de travão (9) irá permitir ao utilizador movimentar a cadeira de rodas sem segurar o guiador (1). This device comprises two parallel axes: the front axle (3) and the rear axle (5), connected by a perpendicular axis (4). The front axle (3) is coupled with the handlebar bars (1) and a brake structure (9) with lever (10), and the rear axle (5) is connected to the set of wheels of the device, the front wheels (6 ) and the rear wheels (11). The brake structure (9) will allow the user to move the wheelchair without holding the handlebar (1).
A roda grande de passagem de esforço (7) e a roda pequena de passagem de esforço (8) de nylon permitem transferir o esforço de movimento da roda grande da cadeira de rodas para as rodas traseiras (11) do dispositivo. The large strain relief wheel (7) and the small nylon strain relief wheel (8) make it possible to transfer the movement effort from the large wheel of the wheelchair to the rear wheels (11) of the device.
Descrição detalhada da invenção Detailed description of the invention
0 dispositivo para auxiliar os utilizadores de cadeiras de rodas a transpor desníveis compreende: a)guiador (es) (1); b) sistema de fixação (2); c)eixo frontal (3); d)eixo perpendicular (4); e)eixo traseiro (5); f)rodas dianteiras (6); g)roda grande de passagem de esforço (7); h)roda pequena de passagem de esforço (8); i) estrutura de travão (9); j )manete (10); k) rodas traseiras (11). The device for assisting wheelchair users to overcome unevenness comprises: a) handlebar(s) (1); b) fixation system (2); c) front axle (3); d) perpendicular axis (4); e) rear axle (5); f)front wheels (6); g) large force passage wheel (7); h)small force passage wheel (8); i) brake structure (9); j) lever (10); k) rear wheels (11).
De um modo geral, o dispositivo é caracterizado por compreender: i. uma estrutura de alavanca, constituída por: a. guiador(es) (1), com pegas na extremidade superior; b. eixo frontal (3); c. eixo perpendicular (4), composto por um eixo maior ao qual estão ligados dois eixos menores, um em cada extremidade. Um desses eixos irá ligar ao eixo frontal (3) do dispositivo e o outro ao eixo traseiro (5); d. eixo traseiro (5); ii. uma estrutura de fixação à cadeira, constituída pelos seguintes componentes: a.sistema de fixação (2) à cadeira de rodas b.eixo traseiro (5) iii. um mecanismo de travão, constituído pelos seguintes componentes: a.estrutura de travão (9); b.manete (10) de travão; iv. uma estrutura de mobilidade, constituída pelos seguintes componentes: a.rodas dianteiras (6) do dispositivo; b.rodas traseiras (11) do dispositivo; c.roda grande de passagem de esforço (7) para a roda do dispositivo; d.roda pequena de passagem de esforço (8) da roda da cadeira de rodas. As rodas de passagem de esforço ligam-se ao restante dispositivo através de um troço perpendicular à estrutura que suporta as rodas dianteiras e traseiras do dispositivo (Fig. 6). As rodas de passagem de esforço podem estar acopladas de um lado ou do outro, ou mesmo dos dois lados. Um dispositivo com dois conjuntos de rodas de passagem de esforço não apresenta vantagens e implica um maior custo de produção. Generally speaking, the device is characterized by comprising: i. a lever structure, consisting of: a. handlebar(s) (1), with handles at the top end; B. front axle (3); ç. perpendicular axis (4), consisting of a major axis to which two minor axes are connected, one at each end. One of these axes will connect to the front axle (3) of the device and the other to the rear axle (5); d. rear axle (5); ii. a structure to fasten to the chair, consisting of the following components: a. fastening system (2) to the wheelchair b. rear axle (5) iii. a brake mechanism, consisting of the following components: a.brake structure (9); b.brake lever (10); iv. a mobility structure, consisting of the following components: a. front wheels (6) of the device; b.rear wheels (11) of the device; c. Large force passage wheel (7) for device wheel; d.small force passage wheel (8) of the wheelchair wheel. The effort passing wheels are connected to the rest of the device through a section perpendicular to the structure that supports the front and rear wheels of the device (Fig. 6). The effort passing wheels can be coupled on one side or the other, or even on both sides. A device with two sets of effort passing wheels does not present advantages and implies a higher production cost.
0 mecanismo de travão é acionado pelo utilizador após este premir a manete (10) de travão existente num dos guiadores, podendo estar do lado direito ou do lado esquerdo. Este movimento desloca o cabo de aço que faz a ligação entre a manete (10) e uma peça metálica e levanta a peça metálica que se encaixa nas ranhuras da estrutura de travão (9). Uma vez que, nesse momento, a peça metálica não se encontra em nenhuma das ranhuras, mas sim suspensa no cabo de aço, é possível movimentar livremente os guiadores (1), para a frente e para trás. The brake mechanism is activated by the user after he presses the brake lever (10) on one of the handlebars, which can be on the right or left side. This movement displaces the steel cable that makes the connection between the lever (10) and a metal part and lifts the metal part that fits in the grooves of the brake structure (9). Since, at that moment, the metal part is not in any of the grooves, but is suspended on the steel cable, it is possible to freely move the handlebars (1), forwards and backwards.
Na estrutura de travão existem três ranhuras (Fig. 3); quando a peça metálica está colocada na ranhura central, o eixo perpendicular (4) encontra-se direito e central, o utilizador pode deslocar-se com a cadeira de rodas sem interferência do dispositivo que se pretende proteger, uma vez que este se encontra no ar; quando a peça metálica se encontra na ranhura dianteira, o eixo perpendicular (4) é empurrado para trás e as rodas dianteiras (6) do dispositivo entram em contacto com o chão, enquanto as rodas traseiras (11) do dispositivo se encontram no ar (nesse momento a cadeira de rodas desloca-se com as rodas dianteiras do dispositivo e com a roda grande da cadeira de rodas); quando a peça metálica se encontra na ranhura traseira, o eixo perpendicular (4) é empurrado para a frente e as rodas traseiras do dispositivo contactam com o chão e nesse momento a cadeira de rodas desloca-se com as rodas dianteiras da cadeira de rodas e com as rodas traseiras (11) do dispositivo, cujo movimento é controlado pela roda grande da cadeira de rodas através da rodas de passagem de esforço (7) e (8). There are three grooves in the brake frame (Fig. 3); when the metal part is placed in the central groove, the perpendicular axis (4) is straight and central, the user can move with the wheelchair without interference from the device to be protected, since it is in the air; when the metal part is in the front groove, the perpendicular axis (4) is pushed back and the front wheels (6) of the device come into contact with the ground, while the rear wheels (11) of the device are in the air ( at that moment, the wheelchair moves with the front wheels of the device and with the large wheel of the wheelchair); when the metal part is in the rear groove, the perpendicular shaft (4) is pushed forward and the wheels The rear wheels of the device contact the floor and at that moment the wheelchair moves with the front wheels of the wheelchair and the rear wheels (11) of the device, whose movement is controlled by the large wheel of the wheelchair through the wheels of effort passage (7) and (8).
O sistema de fixação (2) dianteiro preso na barra descende dos dois braços da cadeira de rodas (Fig. 5). No lado do dispositivo oposto ao do travão, a estrutura consiste em dois componentes. Um componente é semicircular na horizontal, com um orifício de diâmetro superior ao eixo frontal (3) do dispositivo, para que este tenha liberdade de movimento e vem acoplado ao dispositivo, e do outro lado do eixo é constituído por uma placa direita perpendicular ao semicírculo com dois orifícios que permitem a sua fixação através de parafusos. O outro componente é um semicírculo na vertical com uma terminação achatada com dois orifícios (um de cada lado) para fixação através de parafusos e de porcas. Este semicírculo tem um diâmetro superior ao das barras das cadeiras de rodas, mas é apertado de modo a não existir liberdade de movimento. No lado do dispositivo com o sistema de travão, a estrutura metálica que contém as três ranhuras encontra-se perpendicularmente soldada à continuação do componente semicircular na horizontal. The front fixation system (2) attached to the bar descends from the two arms of the wheelchair (Fig. 5). On the side of the device opposite the brake, the structure consists of two components. One component is semicircular horizontally, with a hole with a diameter greater than the front axis (3) of the device, so that it has freedom of movement and is coupled to the device, and on the other side of the axis is constituted by a straight plate perpendicular to the semicircle with two holes that allow it to be fixed using screws. The other component is a vertical semicircle with a flat end with two holes (one on each side) for fastening using screws and nuts. This semicircle is larger in diameter than wheelchair bars, but it is tight so that there is no freedom of movement. On the side of the device with the brake system, the metallic structure containing the three grooves is welded perpendicularly to the continuation of the semicircular component horizontally.
O eixo traseiro (5) do dispositivo permite a fixação do dispositivo à parte traseira da cadeira de rodas, através do orifício central onde estão acopladas as rodas grandes da cadeira de rodas, por baixo da cadeira. Para a fixação do dito eixo, retiram-se as rodas grandes da cadeira de rodas, encaixa-se cada uma das extremidades do eixo traseiro (5) no respetivo orifício central e depois ao montar-se as rodas grandes da cadeira de rodas o dispositivo é acoplado à cadeira de rodas (Fig. 4). The rear axle (5) of the device allows the attachment of the device to the rear of the wheelchair, through the central hole where the large wheelchair wheels are attached, under the chair. To fasten said axle, remove the large wheels from the wheelchair, fit each end of the rear axle (5) in the respective central hole and then, when mounting the wheels of the wheelchair the device is attached to the wheelchair (Fig. 4).
A presente invenção refere-se a um dispositivo que permite ao seu utilizador transpor desníveis, levantando a cadeira de rodas em segurança e de forma independente. O dispositivo consiste num sistema de alavanca a ser acoplado à cadeira de rodas através do eixo traseiro (5), enquanto o eixo frontal (3) do dispositivo é fixado através do sistema de fixação (2) dianteiro na barra que descende dos braços da cadeira de rodas. The present invention refers to a device that allows its user to overcome unevenness, lifting the wheelchair safely and independently. The device consists of a lever system to be coupled to the wheelchair through the rear axle (5), while the front axle (3) of the device is fixed through the front fixation system (2) on the bar that descends from the arms of the chair of wheels.
Para transpor o desnível, o utilizador da cadeira de rodas deve agarrar os guiadores (1) na zona das pegas e ao mesmo tempo a manete (10) de travão. Depois o utilizador deve empurrar o guiador (1) para a frente de modo a colocar as rodas dianteiras (6) do dispositivo no chão. De seguida o utilizador deve largar a manete (10) do travão para trancar a posição das rodas do dispositivo. Nesse momento a cadeira de rodas fica apoiada nas rodas dianteiras (6) do dispositivo e nas rodas grandes da cadeira de rodas. Desta forma as rodas dianteiras da cadeira de rodas encontram-se no ar sobre a parte superior do desnível. O utilizador deve de seguida destrancar a manete (10) do travão e puxar o guiador (1) na direção do utilizador, por forma a colocar as rodas traseiras (11) do dispositivo no chão. Este movimento faz com que as rodas traseiras da cadeira de rodas levantem. Nesse momento, volta-se a trancar a posição do dispositivo com a manete (10) do travão. A cadeira de rodas passa a andar com as rodas dianteiras da cadeira de rodas e com as rodas traseiras (11) do dispositivo. To overcome the unevenness, the wheelchair user must grip the handlebars (1) in the area of the handles and at the same time the brake lever (10). Then the user must push the handlebar (1) forwards in order to place the front wheels (6) of the device on the ground. Then the user must release the brake lever (10) to lock the position of the device wheels. At that moment, the wheelchair is supported on the front wheels (6) of the device and on the large wheels of the wheelchair. In this way the front wheels of the wheelchair are in the air over the top of the slope. The user must then unlock the brake lever (10) and pull the handlebar (1) towards the user, in order to place the rear wheels (11) of the device on the ground. This movement causes the wheelchair's rear wheels to lift. At that moment, the device position is locked again with the brake lever (10). The wheelchair moves with the front wheels of the wheelchair and the rear wheels (11) of the device.
Quando as rodas traseiras (11) do dispositivo atingem o limiar do desnível, o utilizador deve retornar à posição inicial do dispositivo, empurrando os guiadores (1) para a frente, ao mesmo tempo que pressiona a manete (10) de travão. Assim que as quatro rodas do dispositivo estejam no ar (as duas rodas dianteiras (6) e as duas rodas traseiras (11)), tranca-se a posição do dispositivo com a manete (10) de travão e pode-se dar o desnível como transposto e prosseguir com o deslocamento usual da cadeira de rodas. When the rear wheels (11) of the device reach the unevenness threshold, the user must return to the position starting the device by pushing the handlebars (1) forward while depressing the brake lever (10). As soon as the four wheels of the device are in the air (the two front wheels (6) and the two rear wheels (11)), the device position is locked with the brake lever (10) and the unevenness can be set. as transposed and proceed with the usual displacement of the wheelchair.
Descrição das figuras Description of figures
A Fig. 1 ilustra o dispositivo para auxiliar cadeiras de rodas a transpor desníveis, onde estão identificados: guiador(es) (1); sistema de fixação (2); eixo frontal (3); eixo perpendicular (4); eixo traseiro (5); rodas dianteiras (6); roda grande de passagem de esforço (7); roda pequena de passagem de esforço (8); estrutura de travão (9); manete (10) e rodas traseiras (11). Fig. 1 illustrates the device to assist wheelchairs to overcome unevenness, where the following are identified: handlebar(s) (1); fixation system (2); front axle (3); perpendicular axis (4); rear axle (5); front wheels (6); large effort passage wheel (7); small effort passage wheel (8); brake structure (9); lever (10) and rear wheels (11).
A Fig. 2 ilustra o dispositivo acoplado à cadeira de rodas, mostrando a localização dos guiadores (1), do sistema de fixação (2) dianteiro à cadeira de rodas, as rodas dianteiras (6) do dispositivo e a manete (10) de travão. Fig. 2 illustrates the device coupled to the wheelchair, showing the location of the handlebars (1), the fixation system (2) in front of the wheelchair, the front wheels (6) of the device and the lever (10) of brake.
A Fig. 3 apresenta em detalhe o mecanismo de travão que permite trancar a posição das rodas do dispositivo, exibindo: sistema de fixação (2) dianteiro expandido, onde se observa o componente semicircular na vertical (2a) com uma terminação achatada com dois orifícios (um de cada lado) para fixação através de parafusos e de porcas (2b) e um componente semicircular na horizontal (2c), e o sistema ou estrutura de travão (9). A Fig. 4 mostra a ligação traseira do dispositivo à cadeira de rodas, na qual se veem os seguintes constituintes: eixo traseiro (5); roda grande de passagem de esforço (7) para a roda do dispositivo; roda pequena de passagem de esforço (8) da roda da cadeira de rodas e rodas traseiras (11) do dispositivo. Fig. 3 shows in detail the brake mechanism that allows locking the position of the device's wheels, showing: front fastening system (2) expanded, where the vertical semicircular component (2a) with a flat end with two holes is observed (one on each side) for fastening using screws and nuts (2b) and a horizontal semicircular component (2c), and the brake system or structure (9). Fig. 4 shows the rear connection of the device to the wheelchair, in which the following components are seen: rear axle (5); large force passage wheel (7) for device wheel; small push-through wheel (8) of the wheelchair wheel and rear wheels (11) of the device.
A Fig. 5 representa a ligação frontal do dispositivo à cadeira de rodas, na qual se vê o sistema de fixação (2) dianteiro à cadeira de rodas. Fig. 5 represents the front connection of the device to the wheelchair, in which the fixation system (2) front to the wheelchair is seen.
A Fig. 6 mostra o pormenor do mecanismo de passagem de esforços entre a roda traseira (11) do dispositivo e a roda traseira da cadeira de rodas, através da roda grande de passagem de esforço (7) para a roda do dispositivo e da roda pequena de passagem de esforço (8) para a roda da cadeira. Fig. 6 shows the detail of the force transfer mechanism between the rear wheel (11) of the device and the rear wheel of the wheelchair, through the large force transfer wheel (7) to the device wheel and the wheel small passage of effort (8) for the chair wheel.
Lisboa, 30 de novembro de 2020. Lisbon, November 30, 2020.

Claims

REIVINDICAÇÕES
1. Dispositivo para o auxilio na transposição de desníveis por cadeiras de rodas, caracterizado por compreender: a)uma estrutura de alavanca, constituída por: i. guiador(es) (1); ii. eixo frontal (3); iii. eixo perpendicular (4); iv. eixo traseiro (5); b) um sistema de fixação (2); c)um mecanismo de travão, constituído pelos seguintes componentes: v. estrutura de travão (9); vi. manete (10) de travão; d) uma estrutura de mobilidade, constituída por: vii. rodas dianteiras (6); viii. rodas traseiras (11); ix. roda grande de passagem de esforço (7); x. roda pequena de passagem de esforço (8). 1. Device to assist in the crossing of unevenness by wheelchairs, characterized in that it comprises: a) a lever structure, consisting of: i. handlebar(s) (1); ii. front axle (3); iii. perpendicular axis (4); iv. rear axle (5); b) a fixation system (2); c)a brake mechanism, consisting of the following components: v. brake structure (9); saw. brake lever (10); d) a mobility structure, consisting of: vii. front wheels (6); viii. rear wheels (11); ix. large effort passage wheel (7); x. small wheel of effort passage (8).
2. Dispositivo de acordo com a reivindicação 1 caracterizado por o mecanismo de travão compreender um cabo de aço com uma peça metálica na ponta, uma estrutura de travão (9) com três ranhuras e um mecanismo de aperto num dos guiadores, designado de manete (10). Device according to claim 1, characterized in that the brake mechanism comprises a steel cable with a metal piece at the end, a brake structure (9) with three grooves and a clamping mechanism in one of the handlebars, called lever ( 10).
3. Dispositivo de acordo com a reivindicação 1 caracterizado por a roda grande de passagem de esforço (7) estar ligada à roda pequena de passagem de esforço (8) através de um eixo que por sua vez está ligado à estrutura de ligação das rodas. Device according to claim 1, characterized in that the large load transfer wheel (7) is connected to the small load transfer wheel (8) via an axle which in turn is connected to the wheel connecting structure.
4. Dispositivo de acordo com a reivindicação 1 caracterizado por o sistema de fixação (2) dianteiro estar acoplado ao eixo frontal (3), por um componente semicircular na horizontal, com um orifício de diâmetro superior ao diâmetro do dito eixo. Device according to claim 1, characterized in that the front fixation system (2) is coupled to the front axle (3), by a horizontal semicircular component, with a hole with a diameter greater than the diameter of said axle.
5. Dispositivo de acordo com a reivindicações 1 e 4 caracterizado por o sistema de fixação (2) dianteiro estar fixo às barras da cadeira por um componente semicircular na vertical. Device according to claims 1 and 4 characterized in that the front fixation system (2) is fixed to the chair bars by a vertical semicircular component.
6. Método de funcionamento do dispositivo descrito nas reivindicações anteriores caracterizado por compreender as seguintes etapas pelo utilizador: a. agarrar os guiadores (1) na zona das pegas e empurrá- los para a frente com a colocação das rodas dianteiras do dispositivo (6) no chão; b. posteriormente largar a manete (10) do travão trancando a posição das rodas do dispositivo, com a manutenção das rodas dianteiras da cadeira no ar sobre a parte superior do desnível e com a deslocação da cadeira de rodas sobre as rodas dianteiras (6) do dispositivo e sobre as rodas traseiras da cadeira de rodas; c. destrancar a estrutura de travão (9), largando a manete (10) e puxando os guiadores (1) na direção do utilizador, com a colocação das rodas traseiras (11) do dispositivo no chão, levantando as rodas traseiras da cadeira de rodas; d. voltar a trancar a posição do dispositivo com a manete (10) de travão, passando a cadeira de rodas a andar com as rodas dianteiras da cadeira e com as rodas traseiras (11) do dispositivo, controladas pelo utilizador através das rodas grandes da cadeira de rodas, com a passagem do esforço de movimento das rodas grandes da cadeira de rodas para as rodas traseiras (11) do dispositivo; e. deslocar a cadeira de rodas até as rodas traseiras6. Method of operating the device described in the preceding claims characterized in that it comprises the following steps by the user: a. grab the handlebars (1) in the area of the handles and push them forward with the placement of the front wheels of the device (6) on the floor; B. then release the brake lever (10), locking the position of the wheels of the device, keeping the front wheels of the chair in the air over the top of the gap and moving the wheelchair over the front wheels (6) of the device and on the rear wheels of the wheelchair; ç. unlock the brake structure (9), releasing the lever (10) and pulling the handlebars (1) towards the user, placing the rear wheels (11) of the device on the floor, lifting the rear wheels of the wheelchair; d. relock the position of the device with the brake lever (10), making the wheelchair move with the front wheels of the chair and the rear wheels (11) of the device, controlled by the user through the large wheels of the wheelchair, with the passage of movement effort from the large wheels of the wheelchair to the rear wheels (11) of the device; and. move the wheelchair to the rear wheels
(11) do dispositivo atingirem o limiar do desnível; f.retornar à posição inicial do dispositivo, empurrando os guiadores (1) para a frente de forma simultânea à pressão da manete (10) de travão; g. Trancar a posição das rodas do dispositivo que se encontrem no ar, largando a manete (10). (11) of the device reaching the step threshold; f. return to the initial position of the device, pushing the handlebars (1) forward simultaneously with the pressure of the brake lever (10); g. Lock the position of the device wheels that are in the air, releasing the lever (10).
Lisboa, 30 de novembro de 2020. Lisbon, November 30, 2020.
PCT/PT2020/050047 2019-12-30 2020-12-02 Device for helping wheelchair users to negotiate different surface levels and method for operating said device WO2021137710A1 (en)

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PT116043 2019-12-30
PT116043A PT116043B (en) 2019-12-30 2019-12-30 DEVICE TO ASSIST IN TRANSPOSITION OF LEVELS BY WHEELCHAIRS AND ITS OPERATING METHOD

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200276066A1 (en) * 2017-11-10 2020-09-03 Orbilift Pty Ltd A conveyance for surmounting obstacles

Citations (3)

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Publication number Priority date Publication date Assignee Title
US3592282A (en) * 1969-09-12 1971-07-13 Robert L Soileau Stair-traversing wheelchair apparatus
DE10113635A1 (en) * 2001-03-21 2002-12-05 Johannes Alt Trolley for transportation of goods and persons has brake unit for non-slip climbing of stairs and inclined surfaces
US9333980B1 (en) * 2014-12-30 2016-05-10 Footwear & Recreation Technology Research Institute Assistance device for climbing stairs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3592282A (en) * 1969-09-12 1971-07-13 Robert L Soileau Stair-traversing wheelchair apparatus
DE10113635A1 (en) * 2001-03-21 2002-12-05 Johannes Alt Trolley for transportation of goods and persons has brake unit for non-slip climbing of stairs and inclined surfaces
US9333980B1 (en) * 2014-12-30 2016-05-10 Footwear & Recreation Technology Research Institute Assistance device for climbing stairs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200276066A1 (en) * 2017-11-10 2020-09-03 Orbilift Pty Ltd A conveyance for surmounting obstacles
US11759379B2 (en) * 2017-11-10 2023-09-19 Orbilift Pty Ltd Conveyance for surmounting obstacles

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