RO131089A2 - Wheelchair with verticalization system - Google Patents

Abstract

The invention relates to a wheelchair with hand-operated verticalization mechanism, meant for locomotor disabled persons, allowing the user's transition from the seating position to the vertical position and back, intended to be applied in the medical field, for recovery or daily activities. According to the invention, the wheelchair comprises a framework (1) containing an articulated structure (2) comprising a seat (3) which consists of a quadrangle, a back rest (4), a feet rest (5) and two identical levers, laterally arranged on the articulated structure (2) where each lever consists of a handle (6) resting onto the framework (1) with one extremity, while the other extremity is articulated to a bar (7) for actuation of a verticalization mechanism joining the articulated system (2) to the framework (1) by means of the handle (6).

Description

The invention relates to a wheelchair with manually operated and manually operated upright system for persons with locomotor disabilities, the user being able to verticalize and return to the seating position.

There are known wheelchairs with a manually operated upright mechanism for people with motor disabilities who use a lever system that helps the user transition from the sitting position to the upright position and vice versa.

All these mechanisms have the disadvantage that they use a complicated system of levers made up of many components that are manufactured using sophisticated machines.

The problem solved by the invention is that of making a simplistic system from the point of view of the construction that allows a verticalization with minimal effort from the user, but also a simple and practical mechanism that allows adjusting the inclination angle of the backrest for comfort increased.

The object of the invention is to achieve a simple and efficient verticalization mechanism that can be built without sophisticated technologies and machines used in the manufacturing process but also a backrest system that can be adjusted for high comfort.

The mechanism of verticalization, according to the invention solves the above mentioned technical problem by the realization of a wheelchair made up of a frame that contains an articulated structure set in motion by two hydraulic pistons when two barriers on two symmetrical levers positioned on the side are released. The articulated structure, before verticalization, according to the invention, the user can adjust the inclination angle of the backrest for added comfort by pressing a button that allows to leave on the back and return to the original position.

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The wheelchair according to the invention has the following advantages:

- presents a simple and robust construction;

- low weight;

- easy to handle;

- requires minimal effort for user verticalization;

- verticalization and return to the sitting position is done in about 8 seconds;

- is easy to disassemble and transport (backrest and front wheels, removable backs);

- has an adjustable backrest that allows the user to extend the back for added comfort;

- the cost and the time of manufacture are low, the materials and parts that make up the product are common and are easy to buy;

- the product can be built without sophisticated technologies and machines used in the manufacturing process;

The following is an example of embodiment of the invention in relation to Figures 1-5 which represents:

- Fig.l, side view of the wheelchair and of the articulated system of verticalization

- Fig. 2, side view of the vertical locking mechanism

- Fig. 3, side view of the locking mechanism in the sitting position

-Flg.4, side view of the mechanism for adjusting the inclination angle of the backrest

-Fig.5, top view of the mechanism for adjusting the inclination angle of the backrest

The wheelchair with upright system according to the invention is made up of a frame (1) containing an articulated structure (2) on the side of which are placed two symmetrical levers,

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Each of them containing a hook (8) located on the drive bar (7) that in the sitting position hangs the hammer (9). When the hook (8) is unlocked by pulling the lever (10) two hydraulic pistons (11) will be put into operation which will verticalize the user. To lock the mechanism in this position, the user must push in front of the upper end the actuating bar (7), which in turn moves the lever (6) through the joint (12). when the lever (6) has exceeded the axis of linearity with the bar (7) it will be stopped by the stop (13) which locks in the barrier (14). In order to unlock the mechanism and return to the seating position, the user must change the center of gravity backwards and pull the actuating bar (7) which will force the lever (6) to pass in the opposite side of the linearity axis to which it is with the bar (7). Thus, the support (5) stops in the barrier (15) and will force the hydraulic pistons (11) to tighten. The fixing in the sitting position is done when the hook (8) that is tensioned in the stop (16) by the spring (17) will clamp the hammer (9).

The mechanism for adjusting the inclination angle of the backrest according to the invention is composed of a sheet (18) and one (19) disposed on one side and the other of the pipe (20). Table (19) shows a trench (21) with several meshes (22) that are larger in diameter than the trench. The button (29) shows the area (a) with a diameter slightly smaller than that of the groove (21) and the area (b) with a diameter slightly smaller than that of the mesh (22). When the backrest (4) is fixed, the area (b) of the knob is in one of the meshes (22). In order to be able to adjust the inclination angle of the backrest (4), the user must press the area (b) of the button, so that the area (a) can slide in the groove (21), during this time the spring (24) compressing . The fixing of the backrest (4) will be done when the area (a) that has slid along the trench (21) will meet a new eye (22), thus the tension in the spring (24) will be released. In order to be removable, the backrest (4) consists of a pipe (25) equal in diameter in diameter to the pipe (26) which is between the boards (18) and (19) and a pipe (27) with an outer diameter. slightly smaller than the inner diameter of the pipes (26) and (25) in which they enter. Pipes (23) and (26) are welded together. The spring (28) is secured with one end of the fixed pipe (20) and the other end of the movable pipe (23) and has the role of bringing the backrest (4) each time to the position in which it is in figure 4 when he wants it to be adjusted.

Claims (4)

1. Wheelchair with upright system characterized in that it is composed of a frame containing a hinged structure on the side of which there are two symmetrical levers that contain a mechanism for locking the hinged structure in a horizontal position and a mechanism for locking the structure hinged upright. 2. Locking mechanism of the hinged system in a horizontal position that enters the lever component, according to claim number 1, characterized in that it is composed of a hook (8) tensioned by means of a spring (17) in the stop (16), these being located on the drive bar (7), the hook helping to lock the seat (3) in a horizontal position by hanging the foot (9) on the lever (6). 3. Locking mechanism of the hinged system in a vertical position that enters the lever component, according to claim number 1, characterized in that it is composed of a stop (13) gripped by the frame (1) which stops the movement of the lever (6) when it exceeded the axis of linearity with the bar (7), because the hammer (14) located on the lever (6) reaches the end of the stop hole (13). 4. Mechanism for adjusting the inclination angle of the backrest, characterized in that it is composed of a sheet (18) and one (19) disposed on both sides of the pipe (20), between these sheets being a pipe (23) and one (26), the pipe (23) containing a button (29) which when the system is locked it is with the area (b) in the eye (22) and when it is pressed, the spring (24) the area (a) will also be compressed (21), thus changing the inclination angle of the backrest to the horizontal arch (28) will accumulate potential energy to restore the backrest to its original position when the system is unlocked, and the area (a) of the button slides through the groove (21) until it meets another eye (22) and the potential energy from the arc (24) is released the mechanism locking.