WO2015189760A1 - Therapeutic standing wheelchair - Google Patents

Therapeutic standing wheelchair Download PDF

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Publication number
WO2015189760A1
WO2015189760A1 PCT/IB2015/054326 IB2015054326W WO2015189760A1 WO 2015189760 A1 WO2015189760 A1 WO 2015189760A1 IB 2015054326 W IB2015054326 W IB 2015054326W WO 2015189760 A1 WO2015189760 A1 WO 2015189760A1
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WO
WIPO (PCT)
Prior art keywords
standing
seat
wheelchair
base
lifting mechanism
Prior art date
Application number
PCT/IB2015/054326
Other languages
Spanish (es)
French (fr)
Inventor
David Alexandre BRAVO LÓPEZ
Juan Pablo RODRÍGUEZ VICENTINI
Original Assignee
Bravo López David Alexandre
Rodríguez Vicentini Juan Pablo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bravo López David Alexandre, Rodríguez Vicentini Juan Pablo filed Critical Bravo López David Alexandre
Priority to MX2016016177A priority Critical patent/MX2016016177A/en
Priority to CR20160571A priority patent/CR20160571A/en
Publication of WO2015189760A1 publication Critical patent/WO2015189760A1/en
Priority to CONC2018/0000092A priority patent/CO2018000092A2/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/14—Standing-up or sitting-down aids

Definitions

  • the present invention relates, in general, to devices that verticalize or stand up to people with physical disabilities for therapeutic purposes and, in particular, to ergonomically designed standing chair chairs, in order to mobilize the individual from a sitting position. to an erect outside the clinical environment.
  • People with disabilities, of any kind, who have difficulties in achieving normal locomotion are currently confined to move and remain, most of the time, in a wheelchair. This implies that, mostly, they remain in two positions: lying down or sitting.
  • Patent DE 2625046 describes a standing chair that can also serve as a therapeutic chair.
  • the chair has a cam that can be adapted to the ideals of the users' standing movements. Together with a guide element and a limiting lever, this cam controls and limits the standing movement of the seat and the backrest.
  • the purpose of this mechanism was to avoid almost all relative movements between the user's body and the surface of the chair.
  • the mechanism described does not achieve this objective because the axis of rotation between the Backrest and seat is arranged at a relatively large distance from the hip joint of the chair user.
  • the use of cam disks has the disadvantage that they are subjected to a high degree of wear during operation, generating risks of collapse during standing of an obese user, for example.
  • EP 0146660 discloses a standing wheelchair with a lift chassis articulated to the chair.
  • the chassis has a back support for the seat, with two parallelograms acting as levers, articulating at two different points.
  • the first parallelogram holds the backrest in an upright position both in the seated and in the user's standing position.
  • the second parallelogram is used to lower the footrest. Both are exaggeratedly long.
  • This standing wheelchair like almost all its similar ones proposed in recent decades, makes use of the footrest reduction to facilitate its function and expands the base where the user sits, lengthening its antero-posterior diameter.
  • these parallelogram levers make them very tall, much more than a common wheelchair or a normal chair.
  • This mandatory height by design, generates uneven and disadvantageous positions in the execution of daily life activities, such as sharing at a table when eating or at a desk, since it hinders the incorporation of the user to these spaces, risking a blow of your knees with the bottom edge of the table.
  • US Patent 4569556 presents a wheelchair that allows the occupant to rise to a standing position with an articulated structure, consisting of two deformable quadrilaterals and a hydraulic element.
  • the wheelchair allows the occupant to move in the standing position, but does not allow the occupant to move autonomously, that is, the wheelchair of the described patent cannot be moved by either the occupant or an assistant while The occupant is in the standing position. Therefore, without the help of a third party, the wheelchair of US 4569556 does not grant greater mobility to users than the wheelchair of US 3640566.
  • neither of the two patents described previously allows to the occupant lift himself from the sitting position.
  • the energy to move from the sitting position to the standing position is provided by a lever, operated by a third party.
  • US 4231614 and US 4598944 show wheelchairs that allow the occupant to move autonomously to a standing position, but remain motionless in the biped position.
  • US 5609348 and US 5772226 show the wheelchairs that help a user in the movement from a seated position to a bipedal position with a hydraulic device.
  • the invention of US Patent 5772226 allows the occupant to move while remaining in the standing position with the help of a source of electricity and a motor.
  • the purpose of this invention is to avoid almost all relative movements between the user's body and the seat while standing, since the seat is raised when the user stands up.
  • it also fails in basic ergonomic aspects, due to the fact that the double lever makes the seat very long, generating difficulties for the user when standing, which must drag the back of his thighs until his feet reach the footrest, movement impossible to generate by a paraplegic, undermining its autonomy.
  • the double lever of the seat generates a great risk for the user, since in the descent the space between its bars decreases, exposing the hands to very serious injuries by entrapment.
  • a standing and ergonomic wheelchair is developed, of simple design, generated based on the anthropometry and biomechanics of the user, which allows the patient to stand up to a range close to the vertical line, without displacements of the patient's body in relation to the chair.
  • This invention allows, unlike the previously described patents, an ergonomic seated-biped transition, given the simple design of its chassis and dimensions of the backrest, allowing a support of the spine from the middle thoracic zone, generating a displacement of the trunk from a strategic biomechanical point: the dorsolumbar hinge, an area of the spine where the greatest amount of flexion and trunk extension movement occurs .
  • the trunk moves in unison, in a neutral position of little displacement in the sagittal plane (an imaginary plane used in biomechanics, which divides the body into a right and left half), favoring the inhospitable maintenance of the trunk.
  • the backrest is slightly tilted back, which facilitates the displacement of the trunk towards the standing position, reducing the displacement of the center of mass of the trunk forward, keeping it close to the dorsolumbar hinge and the center of rotation of the spine.
  • This biomechanical configuration allows the user's weight to be distributed to the hips and then to their extremities, favoring a safer standing process similar to physiological motor performance.
  • the present invention introduces another novel aspect with respect to the previously described patents.
  • the seat of this invention is constituted by two parallel bars which, unlike the described inventions, are not aligned with the support bars of the footrests.
  • the present invention differs from the rest in that the user's lift occurs close to the projection of the center of mass, which optimizes the lift and reduces the displacements of the user's body caused by the application of the lift at other points. , like the sides or the back.
  • a pair of wheels is added in front of the front wheels of the chair. This allows the center of mass to fall into the support base of the chair, considerably increasing the stability of the chair, without the need to add a counterweight as in most previous inventions.
  • the footrest fixed, like a platform, very close to the ground. This allows the user to extend without being in an unstable position, that is, with its center of mass near or outside its support base.
  • the fact that the legs of the chair user do not press intensely against the knee holders while standing up is also advantageous, and this is achieved by the position of the footrest and the point from which the force is applied of lift BRIEF DESCRIPTION OF THE FIGURES
  • Figure 1 shows a schematic right side view of the chair, where its 6 pairs of wheels, its back and seat backrests and the lift parallelogram are observed;
  • Figure 2 represents a schematic side view of the chair, similar to Figure 1, in the intermediate section of the seated-biped transition;
  • Figure 3 represents a schematic side view of the chair, similar to Figure 1 and 2, at the end of the seated-biped transition, with the projection line of the estimated center of mass, towards the intermediate wheel;
  • Figure 4 represents a schematic side-anterior view of the chair, similar to Figure 3, at the end of the seated-biped transition, that is, standing.
  • the ergonomic standing chair wheelchair outlined in Figure 1 consists of a basic support frame or skeleton, consisting of a backrest 1, a lateral parallelogram to the area of the seat 2, consisting of two parallel bars articulated by a pair of moving axles 7, and a side plate 3, at the level of the knee, which in turn articulates with a pair of movable axes 8 with the force transmission bar 9, at whose distal end (which projects towards the ground) is a medium wheel 5.
  • an axle 15 (figure 4). Attached to this axis 15, an oblique bar 10 is inserted, at the distal end of which is a small wheel 6.
  • a footrest 11 which is coupled to the oblique bar 10.
  • a large wheel 4 is articulated together with its axis 17 (figure 4). This distribution is symmetrical on both sides of the chair. Finally, a lifting element of the seat 12 is observed, which is located between the large wheel 4 and the medium wheel 5.
  • FIG. 2 A schematic side view of the invention is presented in Figure 2, with the same elements described in Figure 1, but showing the intermediate section of the seated-biped transition.
  • the displacement of the lateral parallelogram 2 up and forward is schematized, rotating around the axis 8 coupled to the side plate 3 and also rotating around the axis 7, at the base of the backrest 1.
  • This allows the patient to be lifted from the back of their thighs, by pushing a piston 14 to the base of the seat, keeping the trunk symmetry with the upper extremities, until reaching the full bipedal position, plotted in figure 3.
  • FIG 3 a schematic side view of the invention is presented in Figure 3, at the end of the seated-biped transition. Unlike what is observed in Figure 2 and described in the previous paragraph, a side view is observed in this scheme with the standing system fully upright.
  • An imaginary arrow 13 is also denoted in this figure, which projected the center of gravity of the user to be in a bipedal position using the invention. Notice how this line falls in front of the joint between the backrest 1 and parallelogram 2, anatomically corresponding to the hip joint and also observe how the projection of this line falls just on the medium wheel 5, allowing great stability for the chair and user safety.
  • FIG 4 An anterior and lateral view of the invention is presented in Figure 4, where the chair is observed at the end of the seated-biped transition.
  • the same lateral structures presented in Figure 1 are observed and the joining elements between both structures are added.
  • the piston 14 that lifts the seat and the connection with the double bar of the seat 16 is schematized.
  • the base 12 of the piston, attached to the axis 15 is also observed.

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  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Health & Medical Sciences (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Rehabilitation Tools (AREA)
  • Special Chairs (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Handcart (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

The invention relates to an ergonomically designed standing wheelchair intended to allow a person to move from a seated position to an upright position outside the clinical environment. The seat comprises: a) a frame; a force transmitting bar; c) an inclined bar; d) an axle; e) any type of seat lifting element or mechanism; f) a piston; g) a base for any type of lifting element; h) a backrest support plate; and i) a footrest.

Description

SILLA DE RUEDAS TERAPÉUTICA BIPEDESTABLE  BIPEDESTABLE THERAPEUTIC WHEELCHAIR
MEMORIA DESCRIPTIVA DESCRIPTIVE MEMORY
La presente invención se relaciona, en general, con los aparatos que verticalizan o bipedestan a las personas con discapacidad física con fines terapéuticos y, en particular, con las sillas de ruedas bipedestadoras diseñados ergonómicamente, con la finalidad de movilizar al individuo desde una posición sedente a una erguida fuera del ambiente clínico. Las personas con discapacidad, de cualquier tipo, que presentan dificultades para lograr una locomoción normal, están actualmente confinadas a desplazarse y permanecer, la mayor parte del tiempo, en una silla de ruedas. Esto implica que, mayormente, permanecen en dos posiciones: recostados o sentados. The present invention relates, in general, to devices that verticalize or stand up to people with physical disabilities for therapeutic purposes and, in particular, to ergonomically designed standing chair chairs, in order to mobilize the individual from a sitting position. to an erect outside the clinical environment. People with disabilities, of any kind, who have difficulties in achieving normal locomotion, are currently confined to move and remain, most of the time, in a wheelchair. This implies that, mostly, they remain in two positions: lying down or sitting.
Indudablemente, la silla de ruedas ha permitido, a lo largo de los años, el desplazamiento de la persona con discapacidad y, por ende, cierto grado de autonomía. Sin embargo, la postura sedente por períodos prolongados en una silla de rueda afecta profundamente al individuo, tanto en sus ámbitos biológicos y psicológicos, como en su desempeño social. Undoubtedly, the wheelchair has allowed, over the years, the displacement of the person with disabilities and, therefore, a certain degree of autonomy. However, the sitting posture for prolonged periods in a wheelchair profoundly affects the individual, both in their biological and psychological spheres, and in their social performance.
Dentro de las afecciones observadas en los usuarios de sillas de ruedas, se encuentran trastornos de acortamientos musculares, rigidez articular en sus extremidades inferiores, y fracturas por osteoporosis y un aumento de la probabilidad de desarrollar lesiones en la piel, por la presión prolongada sobre sus nalgas, decurrente de la posición mantenida durante el día, sin la posibilidad de modificarla, por su impedimento motor. Esta imposibilidad de movimiento no sólo afecta a los órganos relacionados con el movimiento, sino que pueden presentar, en una alta proporción, trastornos circulatorios y cardiacos, presentando alto riesgo de infartos y accidentes vasculares por trombosis. Por otro lado, el usuario ve disminuida su participación social y su integración en sociedad, afectando su autoestima y estado de ánimo, redundando en altas tasa de depresión y suicidio. Es por esto que, desde hace décadas, se han llevado a cabo esfuerzos prácticos para revertir los efectos negativos de la posición sedente sostenida. Among the conditions observed in wheelchair users, there are muscular shortening disorders, joint stiffness in their lower extremities, and osteoporosis fractures and an increased likelihood of developing skin lesions, due to prolonged pressure on their Buttocks, due to the position maintained during the day, without the possibility of modifying it, due to its motor impairment. This impossibility of movement not only affects the organs related to movement, but they can present, in a high proportion, circulatory and cardiac disorders, presenting a high risk of heart attacks and vascular accidents due to thrombosis. On the other hand, the user sees their social participation and their integration in society diminished, affecting their self-esteem and mood, resulting in high rates of depression and suicide. That is why, for decades, practical efforts have been made to reverse the negative effects of the sustained sitting position.
Una de las principales herramientas utilizadas para aliviar los problemas del usuario de silla de ruedas, ha sido el proporcionar al individuo el efecto gravitatorio en tablas de bipedestación o //'// tables. Aún más, se han generado esfuerzos tecnológicos para devolver al individuo con discapacidad a la posición bípeda, sin la necesidad de trasladar al paciente desde su silla a un aparato particular que ejecuta dicha tarea. De esta forma, surge el concepto de sillas de ruedas "bipedestadoras". ESTADO DEL ARTE One of the main tools used to alleviate the problems of the wheelchair user has been to provide the individual with the gravitational effect on standing tables or // ' // tables. Moreover, technological efforts have been generated to return the individual with a disability to the bipedal position, without the need to transfer the patient from his chair to a particular device that performs said task. In this way, the concept of "standing" wheelchairs arises. STATE OF ART
Existen, en la literatura y el comercio, innumerables patentes de elementos bipedestadores, que van desde aquellos desarrollados en el ámbito del confort del individuo, hasta aquellos creados para permitir al paciente experimentar los efectos positivos de la verticalización, con fines terapéuticos. Algunos ejemplos de bipedestadores patentados, son los descritos en las patentes US 6353949 y 4796029. Ambas son mesas de posicionamiento en la vertical para pacientes, con fines terapéuticos y diagnósticos. En ambos casos, así como en todas las patentes examinadas, la autonomía del paciente está restringida, ya que apenas se puede lograr lo que su mismo nombre indica, la bipedestación. Si bien en la primera patente de bipedestación mencionada, el paciente posee un control remoto que le permite controlar el ascenso y el descenso, este no permite el desplazamiento del paciente, por lo que su calidad de vida se reduce apenas a los desplazamientos en silla de ruedas y las bipedestaciones en sesiones terapéuticas, por separado. Por tanto, las sillas de ruedas bipedestadoras presentaron, entonces, una importante alternativa para integrar el tratamiento de bipedestación y el desplazamiento. There are, in literature and commerce, innumerable patents of standing elements, ranging from those developed in the field of individual comfort, to those created to allow the patient to experience the positive effects of verticalization, for therapeutic purposes. Some examples of patented bipedestadores are those described in US patents 6353949 and 4796029. Both are vertical positioning tables for patients, for therapeutic and diagnostic purposes. In both cases, as well as in all the patents examined, the patient's autonomy is restricted, since it is barely possible to achieve what the same name indicates, standing. Although in the first mentioned standing patent, the patient has a remote control that allows him to control the ascent and descent, this does not allow the movement of the patient, so that his quality of life is reduced only to the movements in chair of wheels and standing in therapeutic sessions, separately. Therefore, the standing wheelchairs presented, then, an important alternative to integrate the standing treatment and displacement.
Dentro de esta categoría de sillas, existen varios dispositivos patentados, siendo uno de los primeros, el descrito en la patente US 3640566, la cual presenta un modelo de silla de ruedas que permite la bipedestación del usuario, con un resorte que ayuda a la persona con discapacidad en el traslado de una posición sentada a una posición de pie. La silla de ruedas de esta patente, sin embargo, no permite al usuario ser desplazado mientras está en la posición de pie ni la autonomía en la bipedestación. Within this category of chairs, there are several patented devices, one of the first being, the one described in US patent 3640566, which presents a wheelchair model that allows the user to stand, with a spring that helps the person with disability in the transfer of a sitting position to a standing position. The wheelchair of this patent, however, does not allow the user to be displaced while in the standing position or autonomy in standing.
Inicialmente, los primeros diseñadores de sillas de ruedas bipedestadoras se encontraron con la dificultad técnica de que el respaldo de la silla interfería con el proceso de bipedestación. Con el fin de superar esta dificultad, el inventor de la patente US 3589769 tuvo la idea de generar un asiento y un respaldo compuesto por un gran número de rollos acolchados, sin éxito comercial. Posteriormente, surge la patente EP 0815822, respaldo que no permite que el usuario se mantenga totalmente vertical. Por el contrario, el usuario permanece en una posición ligeramente oblicua en la que ejerce fuerzas opuestas sobre el asiento y el respaldo, forzando una flexión de rodilla de alta magnitud y aumentando el estrés articular sobre la rodilla, generando potenciales lesiones. Muchos diseños de sillas de ruedas similares presentan esta dificultad técnica. (US 3589769, US 4623194, DE2625046, FR 2529456 y la EP 0146660). Initially, the first designers of standing wheelchairs encountered the technical difficulty that the backrest of the chair interfered with the standing process. In order to overcome this difficulty, the inventor of US 3589769 had the idea of generating a seat and a backrest composed of a large number of padded rolls, without commercial success. Subsequently, patent EP 0815822 emerges, a backup that does not allow the user to remain completely vertical. On the contrary, the user remains in a slightly oblique position in which he exerts opposing forces on the seat and the backrest, forcing a knee flexion of great magnitude and increasing joint stress on the knee, generating potential injuries. Many similar wheelchair designs present this technical difficulty. (US 3589769, US 4623194, DE2625046, FR 2529456 and EP 0146660).
La patente DE 2625046 describe una silla bipedestadora que también puede servir como una silla terapéutica. La silla posee una leva que se puede adaptar a los ideales de los movimientos de bipedestación de los usuarios. Junto con un elemento de guía y una palanca limitante, esta leva controla y limita el movimiento de bipedestación del asiento y el respaldo. El objetivo de este mecanismo era evitar casi todos los movimientos relativos entre el cuerpo del usuario y la superficie de la silla. Sin embargo, el mecanismo descrito no logra este objetivo debido a que el eje de rotación entre el respaldo y el asiento está dispuesto a una distancia relativamente grande de la articulación de la cadera del usuario de la silla. Además, el uso de discos de levas tiene el inconveniente de que son sometidos a un alto grado de desgaste durante el funcionamiento, generando riesgos de colapso durante la permanencia de pie de un usuario con obesidad, por ejemplo. Adicionalmente, esta y otras sillas conocidas presentan el siguiente inconveniente: La superficie de asiento empuja al usuario de la silla hacia adelante cuando está en el proceso de transición de sedente a bípedo. Así, las rodillas presionan con una fuerza adicional a la del propio peso a los sostenedores de esta articulación, generando gran posibilidad de lesiones por presión, por luxación o inclusive fractura, en el caso de un paciente obeso y con paraplejia. Además, este mecanismo a menudo induce a posiciones incorrectas respecto de la alineación de los segmentos corporales (principalmente extremidades inferiores) en la posición bípeda, aumentando el riesgo de lesiones por torsión articular o incluso riesgo de caída. Frente a esta dificultad, la patente WO 03/026550 propone un mecanismo para mover los contenedores de las rodillas hacia adelante durante la transición de sedente a bípedo, con un complejo mecanismo. Sin embargo, esta mejoría complejiza el proceso y dificulta el proceso de bipedestación en pacientes que tienen control parcial de sus extremidades inferiores. Patent DE 2625046 describes a standing chair that can also serve as a therapeutic chair. The chair has a cam that can be adapted to the ideals of the users' standing movements. Together with a guide element and a limiting lever, this cam controls and limits the standing movement of the seat and the backrest. The purpose of this mechanism was to avoid almost all relative movements between the user's body and the surface of the chair. However, the mechanism described does not achieve this objective because the axis of rotation between the Backrest and seat is arranged at a relatively large distance from the hip joint of the chair user. In addition, the use of cam disks has the disadvantage that they are subjected to a high degree of wear during operation, generating risks of collapse during standing of an obese user, for example. Additionally, this and other known chairs have the following drawback: The seat surface pushes the chair user forward when in the process of transitioning from seated to biped. Thus, the knees press the holders of this joint with an additional force to the weight itself, generating a great possibility of pressure injuries, dislocation or even fracture, in the case of an obese patient with paraplegia. In addition, this mechanism often induces incorrect positions with respect to the alignment of the body segments (mainly lower limbs) in the bipedal position, increasing the risk of injuries due to joint torsion or even risk of falling. Faced with this difficulty, WO 03/026550 proposes a mechanism to move the containers from the knees forward during the transition from seated to biped, with a complex mechanism. However, this improvement complicates the process and hinders the standing process in patients who have partial control of their lower extremities.
La patente EP 0146660 da a conocer una silla de ruedas bipedestadora, con un chasis de levante articulado a la silla. El chasis tiene un soporte de respaldo para el asiento, con dos paralelogramos actuando como palancas, articulando en dos puntos diferentes. El primer paralelogramo sostiene al respaldo en posición vertical tanto en la posición sedente como en la de pie del usuario. El segundo paralelogramo se usa para bajar el reposapiés. Ambos son exageradamente largos. Esta silla de ruedas bipedestadora, al igual que casi todas sus similares propuestos en las últimas décadas, hace uso de la reducción de la estribera para facilitar su función y amplía la base donde se sienta el usuario, alargando su diámetro ántero-posterior. Además, estas palancas en paralelogramo las hacen ser muy altas, mucho más que una silla de ruedas común o una silla normal. Esta altura obligatoria por diseño, genera posiciones poco ergonómicas y desventajosas en la ejecución de las actividades de la vida diaria, como compartir en una mesa al comer o en un escritorio, dado que obstaculiza la incorporación del usuario a estos espacios, arriesgando un golpe de sus rodillas con el borde inferior de la mesa. EP 0146660 discloses a standing wheelchair with a lift chassis articulated to the chair. The chassis has a back support for the seat, with two parallelograms acting as levers, articulating at two different points. The first parallelogram holds the backrest in an upright position both in the seated and in the user's standing position. The second parallelogram is used to lower the footrest. Both are exaggeratedly long. This standing wheelchair, like almost all its similar ones proposed in recent decades, makes use of the footrest reduction to facilitate its function and expands the base where the user sits, lengthening its antero-posterior diameter. In addition, these parallelogram levers make them very tall, much more than a common wheelchair or a normal chair. This mandatory height by design, generates uneven and disadvantageous positions in the execution of daily life activities, such as sharing at a table when eating or at a desk, since it hinders the incorporation of the user to these spaces, risking a blow of your knees with the bottom edge of the table.
La patente US 4569556 presenta una silla de ruedas que permite que el ocupante se levante hacia a una posición de pie con una estructura articulada, compuesta por dos cuadriláteros deformables y un elemento hidráulico. La silla de ruedas permite al ocupante que se mueve en la posición de pie, pero no permite que el ocupante se mueva autónomamente, es decir, la silla de ruedas de la patente descrita no puede ser movida ni por el ocupante ni por un asistente mientras el ocupante se encuentra en la posición de pie. Por lo tanto, sin la ayuda de un tercero, la silla de ruedas de la patente US 4569556 no otorga una movilidad de los usuarios mayor que la silla de ruedas de la patente US 3640566. Además, ninguna de las dos patentes descritas previamente, permite al ocupante levantarse a sí mismo desde la posición sedente. La energía para pasar de la posición sentada a la posición de pie es proporcionada por una palanca, manejada por un tercero. Además, si la palanca llegara a un punto de ruptura o mal funcionamiento, el ocupante se vería obligado a permanecer en la posición sedente. Otras patentes similares son las patentes US 4231614 y US 4598944, que muestran las sillas de ruedas que permiten que el ocupante se mueva autónomamente a una posición de pie, pero permanecen inmóviles en la posición bípeda. Las patentes US 5609348 y US 5772226, muestran las sillas de ruedas que ayudan a un usuario en el movimiento desde una posición sedente a una posición bípeda con un dispositivo hidráulico. La invención de la patente US 5772226 permite al ocupante moverse mientras que permanece en la posición de pie con la ayuda de una fuente de electricidad y un motor. US Patent 4569556 presents a wheelchair that allows the occupant to rise to a standing position with an articulated structure, consisting of two deformable quadrilaterals and a hydraulic element. The wheelchair allows the occupant to move in the standing position, but does not allow the occupant to move autonomously, that is, the wheelchair of the described patent cannot be moved by either the occupant or an assistant while The occupant is in the standing position. Therefore, without the help of a third party, the wheelchair of US 4569556 does not grant greater mobility to users than the wheelchair of US 3640566. In addition, neither of the two patents described previously, allows to the occupant lift himself from the sitting position. The energy to move from the sitting position to the standing position is provided by a lever, operated by a third party. In addition, if the lever reaches a point of rupture or malfunction, the occupant would be forced to remain in the sitting position. Other similar patents are US 4231614 and US 4598944, which show wheelchairs that allow the occupant to move autonomously to a standing position, but remain motionless in the biped position. US 5609348 and US 5772226, show the wheelchairs that help a user in the movement from a seated position to a bipedal position with a hydraulic device. The invention of US Patent 5772226 allows the occupant to move while remaining in the standing position with the help of a source of electricity and a motor.
Todas estas patentes anteriormente descritas permiten bipedestar e incluso que el usuario genere esta acción. Sin embargo, pese a que todas estas máquinas cumplen con su cometido, priorizan la generación de mecanismos óptimos para la transición sedente- bípedo por sobre los aspectos ergonómicos y biométricos básicos para la comodidad y confort de los usuarios. En este sentido, urge generar una silla de ruedas bipedestadora, que unifique el proceso de desplazar al usuario y verticalizarlo evitando los inconvenientes descritos previamente. En marzo del 2013, la patente US 8403352 logró parcialmente este cometido. De acuerdo con la invención, se describe un sistema donde se unen dos palancas dobles en paralelogramos. La primera palanca de paralelogramo está situada en el respaldo y la segunda en el asiento. Ambas poseen un punto de pivote común conectando ambas palancas a un apoyapié. El propósito de esta invención es evitar casi todos los movimientos relativos entre el cuerpo del usuario y el asiento mientras bipedesta, ya que el asiento se levanta cuando el usuario se pone de pie. Sin embargo, también falla en aspectos ergonómicos básicos, por el hecho de que la doble palanca hace que el asiento sea muy largo, generando dificultades para el usuario al momento de bipedestar, el cual debe arrastrar el dorso de sus muslos hasta que sus pies alcancen el reposapiés, movimiento imposible de generar por parte de un parapléjico, atentando contra su autonomía. Además, la doble palanca del asiento genera un gran riesgo para el usuario, dado que en el descenso el espacio entre sus barras disminuye, exponiendo a las manos a lesiones gravísimas por atrapamiento. All of these patents described above allow for standing and even for the user to generate this action. However, even though all these machines fulfill their mission, they prioritize the generation of optimal mechanisms for the sedentary-biped transition over the basic ergonomic and biometric aspects for the comfort and comfort of the users. In this sense, it is urgent to generate a standing wheelchair, which unifies the process of moving the user and verticalizing it avoiding the inconveniences described previously. In March 2013, US Patent 8403352 partially achieved this task. According to the invention, a system is described where two double levers are joined in parallelograms. The first parallelogram lever is located in the backrest and the second in the seat. Both have a common pivot point connecting both levers to a footrest. The purpose of this invention is to avoid almost all relative movements between the user's body and the seat while standing, since the seat is raised when the user stands up. However, it also fails in basic ergonomic aspects, due to the fact that the double lever makes the seat very long, generating difficulties for the user when standing, which must drag the back of his thighs until his feet reach the footrest, movement impossible to generate by a paraplegic, undermining its autonomy. In addition, the double lever of the seat generates a great risk for the user, since in the descent the space between its bars decreases, exposing the hands to very serious injuries by entrapment.
Por lo tanto, en la presente invención, se desarrolla una silla de ruedas bipedestadora y ergonómica, de diseño sencillo, generada en base a la antropometría y biomecánica del usuario, que permite bipedestar al paciente hasta un rango cercano a la línea vertical, sin desplazamientos del cuerpo del paciente en relación a la silla. Therefore, in the present invention, a standing and ergonomic wheelchair is developed, of simple design, generated based on the anthropometry and biomechanics of the user, which allows the patient to stand up to a range close to the vertical line, without displacements of the patient's body in relation to the chair.
Esta invención permite, a diferencia de las patentes descritas previamente, una transición sedente-bípedo ergonómica, dado el diseño simple de su chasis y las dimensiones del respaldo, permitiendo un soporte de la columna desde la zona medio torácica, generando un desplazamiento del tronco desde un punto biomecánico estratégico: la charnela dorsolumbar, una zona de la columna donde se produce la mayor cantidad de movimiento de flexión y extensión del tronco. Al desplazar desde esta zona de pivoteo, el tronco se desplaza al unísono, en posición neutra de escaso desplazamiento en el plano sagital (un plano imaginario usado en biomecánica, que divide al cuerpo en una mitad derecha e izquierda), favoreciendo la mantención inhiesta del tronco. Además, el respaldo está levemente inclinado hacia atrás, lo cual facilita el desplazamiento del tronco hacia la bipedestación, disminuyendo el desplazamiento del centro de masa del tronco hacia adelante, manteniéndolo cerca de la charnela dorsolumbar y el centro de rotación de la columna. Esta configuración biomecánica permite que el peso del usuario se distribuya hacia las caderas y luego a sus extremidades, favoreciendo un proceso de bipedestación más seguro y similar al desempeño motor fisiológico. Adicionalmente, la presente invención introduce otro aspecto novedoso respecto a las patentes previamente descritas. El asiento de esta invención está constituido por dos barras paralelas que, a diferencia de las invenciones descritas, no están alineadas con las barras de sostén de los reposapiés. Esto permite que, independiente del tamaño de los muslos del usuario, se logre una transición sedente-bípedo con libertad para la extensión de cadera y rodilla, sin una barra fija en el dorso de esta última articulación, la cual genera molestias al usuario y constituye un riesgo de lesiones por contacto. Por otro lado, la presente invención se diferencia del resto en que el levante del usuario se produce cercano a la proyección del centro de masa, lo cual optimiza el levante y disminuye los desplazamientos del cuerpo del usuario causados por la aplicación del levante en otros puntos, como los costados o el dorso. This invention allows, unlike the previously described patents, an ergonomic seated-biped transition, given the simple design of its chassis and dimensions of the backrest, allowing a support of the spine from the middle thoracic zone, generating a displacement of the trunk from a strategic biomechanical point: the dorsolumbar hinge, an area of the spine where the greatest amount of flexion and trunk extension movement occurs . When moving from this pivot zone, the trunk moves in unison, in a neutral position of little displacement in the sagittal plane (an imaginary plane used in biomechanics, which divides the body into a right and left half), favoring the inhospitable maintenance of the trunk. In addition, the backrest is slightly tilted back, which facilitates the displacement of the trunk towards the standing position, reducing the displacement of the center of mass of the trunk forward, keeping it close to the dorsolumbar hinge and the center of rotation of the spine. This biomechanical configuration allows the user's weight to be distributed to the hips and then to their extremities, favoring a safer standing process similar to physiological motor performance. Additionally, the present invention introduces another novel aspect with respect to the previously described patents. The seat of this invention is constituted by two parallel bars which, unlike the described inventions, are not aligned with the support bars of the footrests. This allows, regardless of the size of the user's thighs, a sedentary-biped transition with freedom for hip and knee extension, without a fixed bar on the back of this last joint, which causes discomfort to the user and constitutes discomfort and constitutes a risk of contact injuries. On the other hand, the present invention differs from the rest in that the user's lift occurs close to the projection of the center of mass, which optimizes the lift and reduces the displacements of the user's body caused by the application of the lift at other points. , like the sides or the back.
Finalmente, en la presente invención, a diferencia de las descritas, se agrega un par de ruedas frente a las ruedas delanteras de la silla. Esto permite que el centro de masa caiga dentro de la base de sustentación de la silla, aumentando considerablemente la estabilidad de la silla, sin la necesidad de agregar un contrapeso como en la mayoría de las invenciones previas. Adicionalmente, en entre este nuevo par de ruedas anteriores se encuentra el reposapiés, fijo, como una plataforma, muy cercana al suelo. Esto permite que el usuario pueda extenderse sin quedar en una posición inestable, esto es, con su centro de masa cerca o fuera de su base de apoyo. El hecho de que las piernas del usuario de la silla no se presionan intensamente en contra de los sostenedores de la rodilla mientras se pone de pie también es ventajosa, y esto se logra por la posición del reposapiés y el punto desde donde se aplica la fuerza de levante. BREVE DESCRIPCIÓN DE LAS FIGURAS Finally, in the present invention, unlike those described, a pair of wheels is added in front of the front wheels of the chair. This allows the center of mass to fall into the support base of the chair, considerably increasing the stability of the chair, without the need to add a counterweight as in most previous inventions. Additionally, in this new pair of previous wheels is the footrest, fixed, like a platform, very close to the ground. This allows the user to extend without being in an unstable position, that is, with its center of mass near or outside its support base. The fact that the legs of the chair user do not press intensely against the knee holders while standing up is also advantageous, and this is achieved by the position of the footrest and the point from which the force is applied of lift BRIEF DESCRIPTION OF THE FIGURES
A continuación se describirán brevemente los esquemas de la presente invención, en donde: The schemes of the present invention will be briefly described below, wherein:
La figura 1 muestra una vista lateral derecha de la silla, esquemática, donde se observan sus 6 pares de ruedas, sus respaldos del dorso y asiento y el paralelograma de levante; Figure 1 shows a schematic right side view of the chair, where its 6 pairs of wheels, its back and seat backrests and the lift parallelogram are observed;
La figura 2 representa una vista esquemática lateral de la silla, similar a la figura 1 , en el tramo intermedio de la transición sedente-bípedo; Figure 2 represents a schematic side view of the chair, similar to Figure 1, in the intermediate section of the seated-biped transition;
La figura 3 representa una vista esquemática lateral de la silla, similar a la figura 1 y 2, al final de la transición sedente-bípedo, con la línea de la proyección del centro de masa estimado, hacia la rueda intermedia; Figure 3 represents a schematic side view of the chair, similar to Figure 1 and 2, at the end of the seated-biped transition, with the projection line of the estimated center of mass, towards the intermediate wheel;
La figura 4 representa una vista esquemática lateral-anterior de la silla, similar a la figura 3, en el final de la transición sedente-bípedo, esto es, de pie. Figure 4 represents a schematic side-anterior view of the chair, similar to Figure 3, at the end of the seated-biped transition, that is, standing.
DESCRIPCIÓN DETALLADA DE LAS FIGURAS DETAILED DESCRIPTION OF THE FIGURES
La silla de ruedas bipedestadora ergonómica esquematizada en la figura 1 , consta de un chasis o esqueleto básico de sustento, compuesto por un respaldo 1 , un paralelogramo lateral a la zona del asiento 2, compuesto por dos barras paralelas articuladas mediante un par de ejes móviles 7, y una placa lateral 3, a nivel de la rodilla, que a su vez articula con un par de ejes móviles 8 con la barra de transmisión de fuerza 9, en cuyo extremo distal (el cual se proyecta hacia el suelo) se encuentra una rueda mediana 5. Adicionalmente, inserto a la barra 9, se encuentra un eje 15 (figura 4). Anexo a este eje 15, se inserta una barra oblicua 10, en cuyo extremo distal se encuentra una rueda pequeña 6. En la base de la barra 10, se encuentra un reposapiés 11 , el cual se acopla a la barra oblicua 10. En el extremo proximal de la barra de transmisión de fuerza 9 (esto es, cercano al centro de la silla), se encuentra articulada una rueda grande 4 junto con su eje 17 (figura 4). Esta distribución es simétrica a ambos lados de la silla. Finalmente, se observa un elemento de levantamiento del asiento 12, el cual se sitúa entre las rueda grande 4 y la rueda mediana 5. The ergonomic standing chair wheelchair outlined in Figure 1, consists of a basic support frame or skeleton, consisting of a backrest 1, a lateral parallelogram to the area of the seat 2, consisting of two parallel bars articulated by a pair of moving axles 7, and a side plate 3, at the level of the knee, which in turn articulates with a pair of movable axes 8 with the force transmission bar 9, at whose distal end (which projects towards the ground) is a medium wheel 5. Additionally, inserted to the bar 9, there is an axle 15 (figure 4). Attached to this axis 15, an oblique bar 10 is inserted, at the distal end of which is a small wheel 6. At the base of the bar 10, there is a footrest 11, which is coupled to the oblique bar 10. In the proximal end of the force transmission bar 9 (that is, close to the center of the chair), a large wheel 4 is articulated together with its axis 17 (figure 4). This distribution is symmetrical on both sides of the chair. Finally, a lifting element of the seat 12 is observed, which is located between the large wheel 4 and the medium wheel 5.
En la figura 2 se presenta una vista lateral esquemática de la invención, con los mismos elementos descritos en la figura 1 , pero mostrando el tramo intermedio de la transición sedente-bípedo. De esta forma, se esquematiza el desplazamiento del paralelogramo lateral 2 hacia arriba y adelante, girando en torno al eje 8 acoplado a la placa lateral 3 y también girando en torno al eje 7, en la base del respaldo 1. Esto permite la elevación del paciente desde el dorso de sus muslos, mediante el empuje de un pistón 14 a la base del asiento, conservando la simetría del tronco con las extremidades superiores, hasta llegar a la posición bípeda completa, graficada en la figura 3. A schematic side view of the invention is presented in Figure 2, with the same elements described in Figure 1, but showing the intermediate section of the seated-biped transition. In this way, the displacement of the lateral parallelogram 2 up and forward is schematized, rotating around the axis 8 coupled to the side plate 3 and also rotating around the axis 7, at the base of the backrest 1. This allows the patient to be lifted from the back of their thighs, by pushing a piston 14 to the base of the seat, keeping the trunk symmetry with the upper extremities, until reaching the full bipedal position, plotted in figure 3.
En efecto, en la figura 3 se presenta una vista lateral esquemática de la invención, al final de la transición sedente-bípedo. A diferencia de lo observado en la figura 2 y descrito en el párrafo anterior, se observa en este esquema una vista lateral con el sistema de bipedestación completamente erguido. También se denota en esta figura una flecha imaginaria 13, la cual se prospecta la proyección del centro de gravedad del usuario al estar en posición bípeda usando el invento. Nótese como esta línea cae por delante de la articulación entre el respaldo 1 y el paralelogramo 2, lugar correspondiente anatómicamente a la articulación de la cadera y también obsérvese cómo la proyección de esta línea cae justo sobre la rueda mediana 5, permitiendo gran estabilidad para la silla y seguridad para el usuario. Indeed, a schematic side view of the invention is presented in Figure 3, at the end of the seated-biped transition. Unlike what is observed in Figure 2 and described in the previous paragraph, a side view is observed in this scheme with the standing system fully upright. An imaginary arrow 13 is also denoted in this figure, which projected the center of gravity of the user to be in a bipedal position using the invention. Notice how this line falls in front of the joint between the backrest 1 and parallelogram 2, anatomically corresponding to the hip joint and also observe how the projection of this line falls just on the medium wheel 5, allowing great stability for the chair and user safety.
En la figura 4 se presenta una vista anterior y lateral del invento, donde se observa la silla en el final de la transición sedente-bípedo. Se observan las mismas estructuras laterales presentadas en la figura 1 y se agregan los elementos de unión entre ambas estructuras. En este sentido, se esquematiza al pistón 14 que levanta al asiento y la unión con la barra doble del asiento 16. También se observa la base 12 del pistón, anexada al eje 15. Además, se observa la placa 18 de sustento del respaldo y el reposapiés 11 , entre las barras oblicuas 10 y sobre las ruedas pequeñas 6. An anterior and lateral view of the invention is presented in Figure 4, where the chair is observed at the end of the seated-biped transition. The same lateral structures presented in Figure 1 are observed and the joining elements between both structures are added. In this sense, the piston 14 that lifts the seat and the connection with the double bar of the seat 16 is schematized. The base 12 of the piston, attached to the axis 15 is also observed. In addition, the support plate 18 of the backrest and the footrest 11, between the oblique bars 10 and on the small wheels 6.

Claims

REIVINDICACIONES
1) Una silla de ruedas para bipedestación con mecanismo de levante ergonómico desde la base del asiento y estructuras ergonómicas, caracterizada porque comprende: a) Un chasis, compuesto por un respaldo 1 , un paralelogramo lateral a la zona del asiento 2, constituido por dos barras paralelas articuladas con un par de ejes móviles 7, y una placa lateral 3, a nivel de la rodilla, que a su vez articula con un par de ejes móviles 8 y con la barra de transmisión de fuerza 9, en cuyo extremo distal (el cual se proyecta hacia el suelo) se encuentra una rueda mediana 5. 1) A wheelchair for standing with ergonomic lifting mechanism from the base of the seat and ergonomic structures, characterized in that it comprises: a) A chassis, consisting of a backrest 1, a lateral parallelogram to the area of the seat 2, consisting of two articulated parallel bars with a pair of movable axes 7, and a side plate 3, at the knee level, which in turn articulates with a pair of movable axes 8 and with the force transmission bar 9, at whose distal end ( which projects to the ground) is a medium wheel 5.
b) Una barra de transmisión de fuerza 9, a la cual se le anexa un eje 15 que sostiene a barra oblicua 10, en cuyo extremo distal se encuentra una rueda pequeña.  b) A force transmission bar 9, to which is attached an axle 15 that supports an oblique bar 10, at whose distal end is a small wheel.
c) Una barra oblicua 10, en cuya base se encuentra un reposapiés 11.  c) An oblique bar 10, at the base of which is a footrest 11.
d) Un eje 17, que une a las ruedas grandes 4 al chasis, acoplado a la barra de transmisión de fuerza 9.  d) A shaft 17, which links the large wheels 4 to the chassis, coupled to the force transmission bar 9.
e) Un mecanismo o elemento de cualquier naturaleza para levantamiento 12 del asiento, con un pistón 14, el cual se sitúa entre las rueda grande 4 y la rueda mediana 5.  e) A mechanism or element of any nature for lifting the seat 12, with a piston 14, which is located between the large wheel 4 and the medium wheel 5.
f) Un pistón 14 que levanta al asiento y la unión con la barra doble del asiento 16. g) Una base 12 para cualquier elemento de levante, anexada al eje 15.  f) A piston 14 that lifts the seat and the union with the double bar of the seat 16. g) A base 12 for any lifting element, attached to the axis 15.
h) Una placa 18 de sustento del respaldo.  h) A backrest support plate 18.
i) Un reposapiés 11 , entre las barras oblicuas 10 y sobre las ruedas pequeñas 6. i) A footrest 11, between the oblique bars 10 and on the small wheels 6.
2) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas de conformidad con la reivindicación 1 , caracterizada además por bipedestar de forma ergonómica y con un diseño sencillo2) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures according to claim 1, further characterized by standing ergonomically and with a simple design
3) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas de conformidad con las reivindicaciones 1 y 2, caracterizada además por ser diseñada en base a la antropometría y biomecánica del usuario 3) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures in accordance with claims 1 and 2, further characterized by being designed based on the anthropometry and biomechanics of the user
4) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas de conformidad con las reivindicaciones 1 y 2, caracterizada además por permitir bipedestar al usuario hasta un rango cercano a la línea vertical, sin desplazamientos del cuerpo del paciente en relación a la silla.  4) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures according to claims 1 and 2, further characterized by allowing the user to stand up to a range close to the vertical line, without displacements of the body of the patient in relation to the chair.
5) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas de conformidad con las reivindicaciones 1 y 2, caracterizada además porque comprende un respaldo ergonómico que permite generar un desplazamiento del tronco desde la charnela dorsolumbar, produciendo un movimiento del tronco al unísono, en posición neutra, favoreciendo la mantención erguida del tronco en la transición sedente-bípedo. 5) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures according to claims 1 and 2, further characterized in that it comprises an ergonomic backrest that allows to generate a displacement of the trunk from the dorsolumbar hinge, producing a movement of the trunk in unison, in a neutral position, favoring the upright maintenance of the trunk in the sedentary-biped transition.
6) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas de conformidad con las reivindicaciones 1 y 2, caracterizada además porque comprende un respaldo inclinado hacia atrás para apoyo del desplazamiento del tronco hacia la bipedestación, disminuyendo el desplazamiento del centro de masa del tronco hacia adelante y evitando el riesgo de caídas.  6) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures in accordance with claims 1 and 2, further characterized in that it comprises a back inclined backrest to support the movement of the trunk towards the standing, reducing the displacement of the center of mass of the trunk forward and avoiding the risk of falls.
7) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas de conformidad con las reivindicaciones 1 y 2, caracterizada además por mantener el centro de masa cerca de la charnela dorsolumbar y el centro de rotación de la columna, para distribución del peso corporal hacia las caderas y luego a sus extremidades, favoreciendo un proceso de bipedestación seguro y fisiológico.  7) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures according to claims 1 and 2, further characterized by keeping the center of mass near the dorsolumbar hinge and the center of rotation of the column , for distribution of body weight to the hips and then to their extremities, favoring a safe and physiological standing process.
8) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas de conformidad con la reivindicaciones 1 y 2, caracterizada además porque comprende un asiento constituido por dos barras paralelas que están desalineadas con las barras de sostén de los reposapiés. 8) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures according to claims 1 and 2, further characterized in that it comprises a seat consisting of two parallel bars that are misaligned with the support bars of the footrest.
9) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas, de conformidad con la reivindicaciones 1 y 2, caracterizada además porque el levante del usuario se produce cercano a la proyección del centro de masa, lo cual optimiza el levante y disminuye los desplazamientos del cuerpo del usuario causados por la aplicación del levante en otros puntos, como los costados o el dorso.  9) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures, in accordance with claims 1 and 2, further characterized in that the lifting of the user occurs close to the projection of the center of mass, which optimizes the lift and reduces the movements of the user's body caused by the application of the lift at other points, such as the sides or the back.
10) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas de conformidad con las reivindicaciones 1 y 2, caracterizada además porque comprende seis pares de ruedas que permiten que el centro de masa se proyecte dentro de la base de sustentación de la silla, aumentando la estabilidad. 10) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures in accordance with claims 1 and 2, further characterized in that it comprises six pairs of wheels that allow the center of mass to project into the base chair lift, increasing stability.
1 1) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas de conformidad con las reivindicaciones 1 y 2, caracterizada además porque comprende un reposapiés fijo cerca del suelo para permitir que el usuario pueda extenderse sin quedar en una posición inestable. 1 1) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures according to claims 1 and 2, further characterized in that it comprises a fixed footrest near the floor to allow the user to extend without being left in An unstable position.
12) La silla de ruedas para bipedestación con mecanismo de levante desde la base del asiento y estructuras ergonómicas, de conformidad con las reivindicaciones 1 y 2, caracterizada además por mejorar la autoestima e integración social de los usuarios.  12) The wheelchair for standing with lifting mechanism from the base of the seat and ergonomic structures, in accordance with claims 1 and 2, further characterized by improving the self-esteem and social integration of the users.
PCT/IB2015/054326 2014-06-09 2015-06-08 Therapeutic standing wheelchair WO2015189760A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
MX2016016177A MX2016016177A (en) 2014-06-09 2015-06-08 Therapeutic standing wheelchair.
CR20160571A CR20160571A (en) 2014-06-09 2015-06-08 BIPEDESTABLE THERAPEUTIC WHEELCHAIR
CONC2018/0000092A CO2018000092A2 (en) 2014-06-09 2017-01-09 Bi-stable therapeutic wheelchair

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CL201401511 2014-06-09
CL2014001511A CL2014001511A1 (en) 2014-06-09 2014-06-09 Wheelchair for standing with ergonomic lifting mechanism from the base of the seat, comprises a chassis, a power transmission bar, an oblique bar, an axle, a mechanism or element of any nature for lifting the seat, a piston, a base, a backrest support plate and a footrest.

Publications (1)

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WO2015189760A1 true WO2015189760A1 (en) 2015-12-17

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ID=54832979

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Application Number Title Priority Date Filing Date
PCT/IB2015/054326 WO2015189760A1 (en) 2014-06-09 2015-06-08 Therapeutic standing wheelchair

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CL (2) CL2014001511A1 (en)
CO (1) CO2018000092A2 (en)
CR (1) CR20160571A (en)
MX (1) MX2016016177A (en)
PE (1) PE20170449A1 (en)
WO (1) WO2015189760A1 (en)

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CN110063846A (en) * 2018-01-22 2019-07-30 广州市易控自动化工程有限公司 It can change wheelbase and realize aiding upright and the wheel-chair to lie down
US11471361B2 (en) 2017-02-21 2022-10-18 Lifebloom Wheelchair for assisting walking

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EP1506760A1 (en) * 2003-08-15 2005-02-16 Pride Mobility Products, Corporation Constant center of gravity lift and tilt mechanisms for a wheelchair seat
US20070063480A1 (en) * 2005-09-20 2007-03-22 Francois Porcheron Verticalizing chair with control means for controlling the angle of the foot rest in vertical position
ES2284913T3 (en) * 2001-09-21 2007-11-16 Levo Ag Wohlen WHEELCHAIR THAT RISES.
US7708093B1 (en) * 2005-06-08 2010-05-04 Russell Marvin Baker Motorized wheelchair with stand-up capability
EP2190396A1 (en) * 2007-09-18 2010-06-02 Otto Bock Healthcare GmbH Stand-up wheelchair
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EP1506760A1 (en) * 2003-08-15 2005-02-16 Pride Mobility Products, Corporation Constant center of gravity lift and tilt mechanisms for a wheelchair seat
US7708093B1 (en) * 2005-06-08 2010-05-04 Russell Marvin Baker Motorized wheelchair with stand-up capability
US20070063480A1 (en) * 2005-09-20 2007-03-22 Francois Porcheron Verticalizing chair with control means for controlling the angle of the foot rest in vertical position
EP2190396A1 (en) * 2007-09-18 2010-06-02 Otto Bock Healthcare GmbH Stand-up wheelchair
US20130278032A1 (en) * 2010-04-27 2013-10-24 Levo Ag Wohlen Stand-Up Unit for Stand-Up Wheelchairs and Chairs, Particularly Therapy Chairs

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11471361B2 (en) 2017-02-21 2022-10-18 Lifebloom Wheelchair for assisting walking
CN110063846A (en) * 2018-01-22 2019-07-30 广州市易控自动化工程有限公司 It can change wheelbase and realize aiding upright and the wheel-chair to lie down

Also Published As

Publication number Publication date
CL2016003171A1 (en) 2017-11-17
PE20170449A1 (en) 2017-05-17
CO2018000092A2 (en) 2018-01-16
CR20160571A (en) 2017-05-22
MX2016016177A (en) 2018-04-24
CL2014001511A1 (en) 2015-08-14

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