RU170246U1 - OFFICE CHAIR FOR UNLOADING THE SPINE - Google Patents

Abstract

The office chair for unloading the spine is a metal frame in the form of a chair with adjustable bars on the back and seat. The back of the chair consists of an individually adjustable bar fixed under it for the scapula 1, a thickened bar 2, height-adjustable, which ensures the fixation of the natural lumbar bend, also the back of the chair is equipped with additional supports for the forearms 3. In FIG. 2 shows a variant with an installed support for the forearm 3, which makes it possible to expand the chest and increase the amplitude of the respiratory movements of the lungs, which increases the depth of inspiration. The backrest is adjusted by abruptly lifting it and fixing the desired angle using the tilt adjuster 4. Pillows 5 are fixed to the seat, adjustable by screw 6 (located under the seat), which allows you to individually choose a comfortable distance between the pillows 5, depending on the physique of the person. Thus between the pillows 5 creates free space, which allows you to maintain the spine in a "suspended" state and contributes to its unloading. To cover the mechanisms of the chair between the cushions 5, a decorative curtain is pulled 7. The seat of the chair is mounted on a swing-lifting mechanism 8, which allows you to raise and lower the chair using the lift lever 9, located under the seat. Also under the seat is the rocking control 10, which allows you to achieve relaxation, creating the effect of a rocking chair. On the sides of the chair there are 11 armrests in the form of bars, which provide an opportunity for hands to rest. The design of the chair is mounted on the crosspiece 12 with the wheels 13 attached.

Description

The utility model relates to the field of special furniture and can be used at workplaces by people suffering from diseases of the spine, as well as for the prevention of these diseases by unloading the spine.

From the technical level it is known therapeutic and prophylactic chair, consisting of a seat mounted on a telescopic stand with support, backrest with a curved support mounted on the seat, and armrests (RU 2213549, publ. 10.10.2003). An additional torsion unit and a frame for attaching legs are additionally introduced into the chair. The back is convex and equipped with an adjustable headrest. The curved support of the back is made deformable along the curvature of the spine and is connected through a torsion unit to which the bracket is attached, with a telescopic stand. The armrests are mounted on the back of the chair and are made shortened. The frame for the legs is mounted on an axis rigidly mounted behind the back of the chair, and is made to rotate about this axis towards the seat. The seat is connected to the telescopic stand using a flat hinge with a limiter and has the ability to tilt forward at an angle of 15 °. The result is increased usability and relaxation opportunities by creating periodic “internal” spinal massage by swaying the seat on a flat hinge and performing torsion movements with the hips without interrupting the main human work.

The disadvantages are the complexity of its design, the presence of a large number of mechanical bonds, as well as the low efficiency of the vertical unloading of the spine.

Improving the effectiveness of prophylaxis and treatment of the spine by vertical unloading is achieved in a furniture set containing a tubular frame for placing a tabletop and a seat installed with the possibility of adjusting its height (RU No. 2248175, publ. March 20, 2005). The kit is equipped with two or more supporting backs located one after another, the free ends of which are resiliently fixed at the rear of the frame. The elasticity of the fastening of each subsequent backrest is greater than the elasticity of the previous backrest. Movable support elements for the lumbar spine and for the upper back are fixed on the backs. The seat and countertop are made with the possibility of changing the height. The design features of the analogue allow the user to deviate backward, while resting against the support back in the support element located at the level of the lumbar spine. By overcoming the elastic effect of the pillows, the upper back interacts with the supporting back, the elastic fastening of which exceeds the elastic fastening of the back. When leaning forward, the backrests return to their original position. Cycles of deflection back and forth reduce tension of the lumbar muscles, relieve the vertical load on the lumbar vertebrae, reducing pressure in the abdominal cavity.

The disadvantage of the analogue is the complexity of its constructive solutions.

Orthopedic stool is also known for people suffering from diseases of the lumbar spine (RU No. 2012287, publ. 05/15/1994). The chair contains a base with a longitudinal groove on which the seat is mounted with the possibility of horizontal movement. In addition to the seat on the base there is a stand with at least one backrest that can be fixedly moved in a vertical plane. The height of the seat and the angle of inclination of the hinged stand can be changed. The chair is equipped with an additional backrest with armrests located on the counter with the possibility of fixed movement in the vertical direction. Such a constructive solution allows the controlled movements of the seat, backs and armrests to achieve the most comfortable position when the seat with its inner edge is no closer than the hip joint of the seated user.

The disadvantages of this chair are its structural complexity and significant cost.

The closest analogue is a household chair for the prevention of diseases of the spine (RU No. 2238196, publ. 01.27.2008). An unloading cutout is made in the seat on the back side, the shape of which provides the possibility of optimal vertical unloading of the spine. The invention provides a simplified design, the possibility of prophylactic unloading of the spine, improving reliability, reducing costs and increasing the comfort of the product.

The disadvantage is the limited functionality that does not allow to fully unload the vertebral and pelvic area of a person when sitting.

The challenge facing the author is to expand the functionality of the chair, allowing the user to unload the spine as much as possible and improve blood circulation in the pelvic area.

The problem is solved thanks to a new, improved design of the chair with movable and adjustable bars (on the back) and pillows (on the seat), which serve to obtain the maximum unloading effect for the spine, depending on the growth and physique of the person, and also improve blood circulation of the pelvic organs.

In FIG. 1 shows the appearance of an office chair for unloading the spine.

In FIG. 2 shows a variant with an installed support for the forearms (top view).

In FIG. 3 shows the seat adjusters under the seat.

In FIG. Figure 4 shows an example of the impact on the spine of two forces (P - body weight and R - support reaction) when sitting on a regular chair.

In FIG. Figure 5 shows an example of two forces acting on the spine (P - body weight and R - support reaction) when sitting on an office chair to unload the spine.

 The inventive office chair for unloading the spine is a metal frame in the form of a chair with adjustable bars on the back and seat. The back of the chair consists of an individually adjustable bar fixed under it for the scapula 1, a thickened bar 2, height-adjustable, which ensures the fixation of the natural lumbar bend, also the back of the chair is equipped with additional supports for the forearms 3. In FIG. 2 shows a variant with an installed support for the forearm 3, which makes it possible to expand the chest and increase the amplitude of the respiratory movements of the lungs, which increases the depth of inspiration. The backrest is adjusted by abruptly lifting it and fixing the desired angle using the tilt adjuster 4. Pillows 5 are fixed to the seat, adjustable by screw 6 (located under the seat), which allows you to individually choose a comfortable distance between the pillows 5, depending on the physique of the person. Thus between the pillows 5 creates free space, which allows you to maintain the spine in a "suspended" state and contributes to its unloading. To cover the mechanisms of the chair between the cushions 5, a decorative curtain is pulled 7. The seat of the chair is mounted on a swing-lifting mechanism 8, which allows you to raise and lower the chair using the lift lever 9, located under the seat. Also under the seat is the rocking control 10, which allows you to achieve relaxation, creating the effect of a rocking chair. On the sides of the chair there are 11 armrests in the form of bars, which provide an opportunity for hands to rest. The design of the chair is mounted on the crosspiece 12 with the wheels 13 attached.

In FIG. 4 and 5 show an example of the advantage of an office chair for unloading the spine in comparison with a conventional chair (armchair).

A sedentary person exposes his spine to two forces: P - body weight (above the pelvis) and R - support reaction (seat) directed towards each other. In FIG. Figure 4 shows an example of sitting in a regular chair (armchair), how the forces act in one plane and compress the spine in the longitudinal direction, which carries an increased load on the spine and does not contribute to comfortable sitting of the user (P = -R). In FIG. Figure 5 shows how, thanks to the design features of the office chair for unloading the spine, the body weight is distributed to the hips and back (P = P1 + P2; R = R1 + R2), and the spine itself is in a “suspended" state, which allows maximum unloading of the spine when sitting, improve blood circulation by preventing problems in the pelvic area. For the greatest convenience, the backrest can be adjusted by abruptly lifting it with fixing a convenient angle of inclination.

Technical results that can be obtained by implementing a utility model are:

- the possibility of preventive unloading of the spine in everyday life and in production;

- prevention of problems in the pelvic area;

- increase comfort.

Thus, the task is completed.

Claims (2)

An office chair for unloading the spine, containing a metal frame, backrest, armrests, upholstery, seat, characterized in that an individually adjustable block for the shoulder blades is fixed to the back of the chair, additional support for the forearms and a tilt adjuster are fixed, the back is connected to the seat on which the pillows are regulated by a screw located under the seat; also under the seat is the chair swing regulator.

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