RU173357U1 - Transforming table for self-study on the restoration of the speech function of patients with aphasia in a hospital - Google Patents

Abstract

The utility model relates to medicine, to the section of neurology and neuropsychology, and can be used in neurorehabilitation departments of neurological and neurosurgical clinics when conducting independent classes to restore impaired speech function in patients with aphasia in a neurological hospital. A transformer table has been created for self-study of restoration of speech function in patients with aphasia in a hospital setting, containing a frame made of wood, in the central part of which a tabletop is fixed, while the frame has a total height of 1600-2000 mm and a width of 1100-1300 mm and contains the rear and two side walls, rigidly interconnected by screws. The frame is divided into parts by the upper, central and lower jumpers, the width of which is the width of the frame minus the thickness of the side walls, the thickness of the rear and two side walls, as well as the upper bridge, being 20-25 mm, the thickness of the central and lower jumpers 30-35 mm. The upper part of the frame, located above the central jumper, has a depth of 100-150 mm and is divided into separate compartments by vertical and horizontal partitions with a thickness of 20-25 mm, rigidly fastened to each other and with the back and side walls, as well as the upper and central jumpers by screw connection . The lower part of the frame, located under the central and lower jumpers, has a depth of 500-600 mm and includes vertical racks 30-35 mm thick, rigidly connected by screws to the rear wall, the central and lower jumpers. A tabletop is movably fixed on the upper part of the central lintel through loops, the width of which is equal to the width of the central lintel, and the depth is half the width of the central lintel, while a rectangular cutout of 600-700 mm wide and 200-300 mm deep is made in the front central part of the tabletop. On the left and right edges of the inner side of the countertop, telescopic brackets are fixed that connect it to the side walls of the frame. Two flaps are movably attached to the side walls over the central bridge of the frame, through the hinges, the width of each of which is half the width of the central bridge, and the height is the distance from the lower surface of the central bridge to the upper surface of the upper bridge. In the lower part of each leaf there are fixing screws, which, when folding the transformer table, are screwed into metal inserts with internal thread, mounted on the end faces of the tabletop. Latches are mounted in the upper and lower parts of one of the flaps, and a lock is mounted on the side of the other flap, and fixtures are attached to the lower side of the upper lintel. The created structural elements of the transformer table expand its functionality in the process of restoration of speech function during aphasia and provide the ability to visually isolate the patient from the surrounding space, as well as the ability to actively speak aloud the material being worked out: sounds, words, sentences, in the absence of the need for isolation for independent classes of patients with aphasia of individual hospital premises.

Description

This useful model relates to medicine, to the section of neurology and neuropsychology, and can be used in the departments of neurorehabilitation of neurological and neurosurgical clinics when conducting independent classes to restore impaired speech function in patients with aphasia in a neurological hospital in which these patients undergo treatment or rehabilitation training.

Speech disorder with aphasia is one of the most complex mental disorders requiring a long recovery period.

The traditional course on the restoration of impaired speech function during aphasia in a hospital includes, along with an individual lesson with a specialist in restorative education, and independent work of patients, which consists in the patient performing daily tasks received from a specialist.

As a rule, independent studies of patients with aphasia are carried out either in the hospital ward or in the corridors and halls of the clinic departments.

The disadvantages of using hospital wards, corridors and halls of clinic departments for independent classes to restore speech function in patients with aphasia are: the presence in the hospital ward, in the corridor or hall of the department of subjects that distract the patient's attention, interfere with his focus, and in some cases cause embarrassment a patient who is embarrassed to show his speech disorders with strangers; inconvenience of using bedside tables during independent studies for performing graphic actions: writing, drawing, which are necessary for speech restoration during aphasia; the lack of tables necessary for conducting full classes to restore speech function; insufficient lighting of the corridors and halls of the departments, necessary for independent studies, which usually take place in the evening; the inability to use computers with the necessary software for voice recovery.

In some clinics, in particular in the "Center for Speech Pathology and Neurorehabilitation", computer classes are provided for independent study of patients with aphasia, which are separate rooms in which patient workstations are equipped, which are desks with monitors located on them and connected to computer system units on which special programs are installed to restore impaired speech function (Center for Speech Pathology and Neurorehabilitation. Center structure, found on 02.10.2017 on the Internet at the address: http://www.cprin.ru/departments?lightbox=dataItem-ivtekc46). The disadvantages of using the workstations of this computer class for self-study exercises to restore speech function in patients with aphasia are: the absence of any visual isolation of the patient from other patients at adjacent tables, which distracts patients from self-study on the computer and reduces their effectiveness; the need to maintain silence during classes so as not to interfere with patients who are engaged in a number of patients, as a result of which there is no possibility for patients to actively speak aloud the material being worked out: sounds, words, sentences, which is an essential component for restoring speech function in aphasia, as it includes in the process of speech restoration kinesthetic and auditory afferentation; the need to allocate a separate room for a computer class, which is not available to all clinics, as a result of which the availability of computer classes for classes is not widespread.

Thus, the above-considered disadvantages of conducting independent classes of patients with aphasia in hospital wards, halls of departments and computer classes contribute to a decrease in the effectiveness of in-hospital classes to restore impaired speech in patients with aphasia, not allowing patients to carry out fully independent studies and achieve the maximum possible result recovery for the period the patient is in the hospital.

One of the solutions to this problem is the use of folding or transformable tables in the practice of working with patients, which makes it possible to realize the possibility of creating jobs for patients with aphasia without using separate hospital premises. So, from the prior art, a folding wall-mounted desk is known, which is intended for use in rooms where there is not enough space to accommodate a traditional desk. Structurally, the folding wall-mounted desk is made in the form of a hinged shelf-cabinet fixed to the wall, to the lower part of which a swing-out sash is movably fixed, which is fixed in the folded state by means of a lock. At the same time, a reclining support is movably attached to the upper part of the reclining sash. When unfolding a wall-mounted desk, the folding leaf acts as a table top, the front edge of which rests on a folding bracket that acts as the legs of the table (Architecture Admirers, Writing Desk Folded in a Tiny Cabinet on the Wall, found 02/10/2017 on the Internet at: http : //www.architectureadmirers.com/writing-desk/). The disadvantages of this design of a folding wall table when using it as a workplace for independent classes to restore the speech function of patients with aphasia in a hospital environment are the following: a) this table design provides only a horizontal surface for classes, but does not provide any visual isolation of the surrounding spaces from the patient engaged at this table; b) the danger of this design of the table when it is used in the corridors and halls of medical institutions, since in the event of a lock failure securing the swinging leaf with a support, it can spontaneously fall out of the cabinet shelf and cause injury to a patient or medical worker nearby; c) the danger of this design of the table directly to the patient concerned, since it is fixed on the wall and due to the load on the surface of the table top, or for any other reasons (weak wall strength, weakening of the fastening elements from time to time, etc.) the whole structure can come off walls, causing serious injury to the patient.

Also known from the prior art is the "Table transformer Basic 280.020 Combo", which is designed to work using a computer. The module of this design provides for its assembly, both on the right and left sides. In the center, a hinged door-tabletop is fixed on the secret bracket, which is fixed in a horizontal position due to the extension of the lower wings, which serve as supports. Behind the countertop door is a shelf for a monitor and a rack for CDs. Below the hinged door-racks there is a roll-out shelf for the system unit on a wheel support. Structurally, this table is designed as a cabinet mounted on the floor surface with a height of 1655 mm, a width of 800 mm, and a depth of 394 mm. (MEBELION.ru, Household goods store, Computer tables, Transforming table Basic 280.020 Combo, found 02.02.2017 on the Internet at: http://im-mebel.ru/tovar/komputernij-stol-bejsik-kombo- ld-280-020.htm). The disadvantages of this design of the table when using it as a workplace for independent classes to restore the speech function of patients with aphasia in a hospital are: a) this table design provides only a horizontal surface for classes, but does not provide any visual isolation of the external space from the patient engaged at this table; b) when using this design in the corridors and halls of medical institutions there is a danger of falling out of the reclining sash and causing injury to a nearby patient or medical worker; c) the significant width of the design of this table makes it too cumbersome when used in the corridors of medical institutions. This source of information was taken by us for the closest analogue.

In order to solve the above problems, a "Transformer table for self-study on the restoration of the speech function of patients with aphasia in a hospital" (hereinafter referred to as the "transformer table") was developed.

The tasks to be solved by the claimed technical solution are: a) ensuring visual isolation of the patient during the classes from the surrounding clinic and people nearby; b) providing the patient with the opportunity to speak aloud during self-study practiced verbal material: sounds, words, sentences; c) ensuring the possibility of using computers with appropriate software during independent studies of patients with aphasia; d) ensuring the level of illumination necessary for independent studies of patients with aphasia; e) the compactness of the “transformer table", which allows its use in the corridors and halls of neurological hospitals; f) ensuring the complete safety of using the “transformer table" for both the patients who are involved in them and for patients and medical personnel nearby; g) the absence of the need to allocate for the placement of "transformer tables" of individual hospital premises.

The technical result of the proposed utility model is to expand the functionality of the transformer table in the process of restoration of speech function during aphasia due to the design features of the device, ensuring the safety of its operation and the possibility of visual isolation of the patient from the surrounding space, as well as the possibility of actively speaking aloud the material being worked out: sounds , words, sentences, in the absence of the need for allocation for independent studies of patients with faziey individual rooms of a hospital.

The technical result is achieved by the fact that a transforming table was created for self-study to restore speech function in patients with aphasia in a hospital setting, containing a frame made of wood, in the central part of which a tabletop is fixed, while the frame has a total height of 1600-2000 mm, and a width of 1100-1300 mm and contains a back and two side walls rigidly connected to each other by screws, while the frame is divided into parts by the upper, central and lower jumpers, the width of which is the width of the frame minus thickness s of the side walls, and the thickness of the rear and two side walls, as well as the upper bridge, is 20-25 mm, the thickness of the central and lower bridge is 30-35 mm, the upper part of the frame located above the central bridge has a depth of 100-150 mm and is divided into individual compartments with vertical and horizontal partitions with a thickness of 20-25 mm, rigidly fastened to each other and with the rear and side walls, as well as the upper and central bridges by means of a screw connection, the lower part of the frame located under the central and lower bridges and, has a depth of 500-600 mm and includes vertical racks 30-35 mm thick, rigidly connected by screws to the rear wall, the central and lower jumpers, on the upper part of the central bridge through the hinges a tabletop is movably fixed, the width of which is equal to the width of the central bridge, and the depth is half the width of the central lintel, while in the front central part of the countertop a rectangular cut is made with a width of 600-700 mm and a depth of 200-300 mm, those are fixed on the left and right edges of the inner side of the countertop Lescopic brackets connecting it to the side walls of the frame, above the central bridge of the frame, two flaps are movably attached to the side walls by means of hinges, the width of each of which is half the width of the central bridge and the height is the distance from the lower surface of the central bridge to the upper surface of the upper bridge, fixing screws are located in the lower part of each leaf, which when folding the transformer table are screwed into metal inserts with internal thread, mounted The ends are mounted on the ends of the countertops, latches are mounted in the upper and lower parts of one of the wings, and a lock is mounted in the side of the other case, lamps are attached to the lower side of the upper lintel.

In addition, a monitor is attached to the rear wall of the central compartment of the frame by screws, which is connected via cable to a mini-computer located in one of the side compartments.

And on the upper part of the side walls, fasteners are rigidly fixed, designed to attach the transformer table to the vertical surface of the wall.

In the compartments of the upper part of the frame, a computer keyboard, headphones, microphone, writing instruments, notebooks, teaching aids, a timer and other accessories used in independent studies of patients with aphasia are placed.

The hinged seat is movably attached to the lower jumper by means of hinges, which is fixed in horizontal position on two supports, each of which is rigidly fixed by screws on the inner surface of the side walls, and the seat back is rigidly fixed on the ends of the central and lower jumpers.

The essence of the "Transformer-table for independent studies on the restoration of the speech function of patients with aphasia in a hospital" is illustrated by the drawings, which depict:

In FIG. 1 - frame "table-transformer";

In FIG. 2 - general view of the "table-transformer";

In FIG. 3 is a side view of the “transformer table";

In FIG. 4 - general view of the “transformer table" with open sashes;

In FIG. 5 - general view of the “table-transformer” in the unfolded state;

In FIG. 6 is a side view of the “transformer table" in the unfolded state.

The proposed "transforming table" is made of a wooden base, in particular chipboard and contains a prefabricated frame (see Fig. 1), the main elements of which are the rear wall (1), two side walls (2), the upper bridge (3), the central bridge (4) and the lower jumper (5). Moreover, two side walls (2) are connected to the rear wall (1), and the upper bridge (3), the central bridge (4) and the lower bridge (5) are connected to the rear wall (1) and side walls (2) by means of screws (on figures not shown).

The total height of the frame is 1600-2000 mm, width 1100-1300 mm. The width of the upper bridge (3), the central bridge (4) and the lower bridge (5) is the width of the frame minus the thickness of the side walls (2).

The thickness of the wooden base from which the rear wall (1) is made, two side walls (2) and the upper bridge (3) is 20-25 mm, the thickness of the central bridge (4) and the lower bridge (5) is 30-35 mm.

Fasteners (18) are rigidly attached to the upper part of the side walls (2), intended for fastening the “transformer table” to the vertical surface of the wall.

The upper part of the frame, placed above the central bridge (4) has a depth of 100-150 mm and is divided into separate compartments by vertical and horizontal partitions (6) with a thickness of 20-25 mm. The largest of the compartments has dimensions sufficient to accommodate a computer monitor (19) (see Fig. 5) with a diagonal size of up to 26-28 inches.

Vertical and horizontal partitions (6) are rigidly connected to each other and to the structural elements of the frame: the back wall (1), side walls (2), the upper jumper (3) and the central jumper (4) by means of a screw connection (not shown in the figures) .

The lower part of the frame, placed under the central (4) and lower (5) jumpers, has a depth of 500-600 mm and includes, for structural strength, vertical posts (9), 30-35 mm thick, rigidly connected to the frame construction elements : back wall (1), central jumper (4) and lower jumper (5).

To the upper part of the central bridge (4) of the frame (see Figs. 4 and 5), through the hinges (12b), a tabletop (7) is movably attached, the width of which is equal to the width of the central bridge (4), and the depth is half the width of the central bridge (4). At the same time, in the front central part of the countertop (7), a rectangular cut-out is made with a width of 600-700 mm and a depth of 200-300 mm, sufficient to accommodate the patient's body during self-study at the “transformer table”.

On the left and right edges of the inner side of the countertop (7), telescopic brackets are fixed (not shown in the figures) connecting it to the side walls (2) and providing a rigid horizontal position of the countertop (7) when it is unfolded. As telescopic brackets, for example, GL103GR / 80/3 secretory gas elevators can be used (Principle Company, GL103GR / 80/3 Secret Gas Elevator, found on 02/10/2017 on the Internet at: http://princip72.ru/tovar/ sekretemyj-gazovyj-lift-gl103gr-80-3 /).

Above the central bridge (4) of the frame (see Fig. 2-6), two flaps (8) are movably attached to the side walls (2) by means of hinges (12a), the width of each of which is half the width of the central bridge (4), and height - the distance from the lower surface of the central bridge (4) to the upper surface of the upper bridge (3).

The lower part of each leaf (8) is equipped with fixing screws (13a), which, when folding the “transformer table”, are screwed into metal inserts with internal thread (not shown in the figures) mounted on the end faces of the countertop (7), providing a rigid fixation of the countertop ( 7) in a horizontal position.

Latches (not shown in the figures) are mounted in the upper and lower parts of one of the leaves (8), which provide a rigid fixation of this wing (8) when the “transformer table” is folded, and a lock is mounted on the side of the other wing (8) 14), which allows closing the shutters (8) with a key.

Lamps (17) are mounted in the lower side of the upper bridge (3), which provide the necessary illumination of the working space during independent studies of patients. Turning on / off the fixtures (17) is carried out by means of a switch (not shown in the figures) located in one of the compartments formed by partitions (6).

A hinged seat (10) 30–35 mm thick is movably attached to the lower jumper (5) by means of hinges (12c) and is fixed in horizontal position on two supports (15), each of which is rigidly fixed by screws to the inner surface of the side walls (2) )

To the ends of the central (4) and lower (5) jumpers by means of screws (not shown in the figures) the back of the seat (11) 20-25 mm thick is rigidly fixed.

On the upper surface of the hinged seat (10) and the back of the seat (11), soft elastic material, for example, foam rubber, fitted on the outside with some material, for example artificial leather, can be fixed.

The folding seat (10) is fixed in the vertical position (when folding the device for independent occupation of the patient) by means of the fixing screws (13b) located on the side walls (2), which, when the folding seat (10) is raised, are screwed into the seats mounted in the side ends (10) ) metal inserts with internal thread (not shown in the figures), providing rigid fixation of the folding seat (10) in a horizontal position, providing the necessary space for the location of the legs of the subject.

To the uprights (9) located under the lower jumper (5) by means of screws (not shown in the figures), a protective and decorative panel (16), 25-35 mm thick, hiding the uprights (9) and the rear wall (1) of the frame is rigidly attached.

In the central compartment of the "transformer table" (see Fig. 5) there is a computer monitor (19) that is screwed to the rear wall (1) of the frame and connected via cable to a mini-computer located in one of the side compartments formed partitions 6. Such a computer can be, for example, Nettop IRU NUC 110, the case of which has dimensions 190 × 116 × 40 mm (Citylink. Electronic discounter. Computers, Nettop IRU NUC 110, found 02/10/2017 on the Internet at: https: // www.citilink.ru/catalog/computers_and_notebooks/computers/339159).

Also in compartments formed by partitions (6), a computer keyboard, headphones, microphone, writing instruments, notebooks, teaching aids, a timer and other accessories used for conducting independent classes of patients with aphasia are placed.

The proposed “table-transformer” device is intended for placement in the corridors and halls of the neurological departments of clinics, and perform the following functions: a) in the morning and afternoon, it is used as a seat for patients in the department, as well as for patients awaiting a doctor’s appointment (see Fig. 2 and 3); b) in the evening, the "transformer table" is laid out by the paramedical staff to conduct independent classes for patients with aphasia (see Figs. 5 and 6).

On weekends and holidays, when individual classes with a specialist are not carried out with patients, the “transforming table” can be used for self-study of patients throughout the day.

The best place to place a “transformer table” is the most sparsely populated parts of the corridors and halls, however, even if there are no such places in the department, this is not critical, since the “transformer tables” provide a certain visual isolation of the patient from the surrounding space. This visual isolation is ensured thanks to the following structural elements of the device, forming the learning environment fenced off from the clinic’s surrounding area: a) to the left and to the right of the patient, the widened wings (8), which hide the surrounding area to the left and the right of the patient; b) a rectangular cutout in the countertop (7), in which the front part of the patient’s torso is located, so that even when turning the head, he sees only the inside of one of the wings (8).

Thus, the abovementioned structural elements of the “transformer table” form a special, isolated learning environment that is fenced off from the surrounding environment, which provides the most favorable conditions for independent study, protecting the patient from distraction and especially from embarrassment and embarrassment if strangers are nearby.

Therefore, the isolated learning environment formed by the “transformer table” provides the patient with a comfortable psychological background for classes and allows him to pronounce the training material necessary for speech restoration in the form of words, sentences and phrases. Due to the fact that "transformer tables" are located at a certain distance from each other, words spoken by patients, sentences and phrases cannot interfere with the activities of other patients.

Of fundamental importance for the use of the "transformer table" in medical institutions is the high safety of its practical use, which is ensured by the following structural elements:

a) additional fixation of the countertop (7) in the folded state of the “transformer table” by means of the shutters (8), which does not allow it to accidentally fall out and cause injury to a person nearby when the lock (14) is broken;

b) the design of the “transformer table”, which is firmly located on the floor surface and can additionally be attached to the wall by means of fasteners (18), which completely eliminates the possibility of the device falling onto a patient or medical worker nearby.

c) the nodes of the device that ensure that the countertops (7) are held in a horizontal position (two fixing screws (13a) and two telescopic arms) that duplicate each other, ensuring the safety of the patient.

Work with the "table-transformer for independent studies on the restoration of the speech function of patients with aphasia in a hospital" is as follows.

Before the beginning of independent studies of patients, carried out in the afternoon, one of the employees of the medical institution (from technical or paramedical personnel) carries out the unfolding of the device, putting it into operation with patients. To this end, the worker lifts the folding seat (11) at an angle of 90 degrees and fixes it in this position by tightening the fixing screws (13b) located on the side walls (2). Next, the employee opens the key with the key (14) and takes the leaf (8) to an angle of 90 degrees, then releases the other leaf (8) from fixing with latches and also takes it to a 90 degree angle (see Fig. 4), as a result of which vertically, the countertop (7) can be moved to a horizontal position, which is carried out smoothly due to the telescopic brackets installed on it.

After this, the worker connects by tightening the fixing screws (13a) the vertically arranged worktop (7) with the wings (8) spread apart by an angle of 90 degrees, resulting in a rigid structure that is safe for the patient to practice (see Figs. 5 and 6) . Then, in front of the “transformer table”, the lamps (17) are turned on, a mini-computer with a monitor (19), and the patient can start an independent lesson, which is carried out in a special training space formed by the “transformer table”. The total time for independent study at the “transformer table” of one patient should not exceed more than 45 minutes; therefore, for the period from 5 p.m. to 10 p.m., about 6 patients with aphasia can conduct independent classes at their own table. After the completion of independent studies of patients, the “transformer table" develops in the sequence opposite to the one in which it was unfolded.

Along with the use of the “transformer table” for self-study of speech restoration, it can also be used in self-study of patients with impaired other mental functions: memory, attention, visual and spatial perception of counting, intellectual activity, etc. If necessary, “ transforming table ”, installed in a poorly crowded corridor or hall of the clinic, can be used throughout the day and evening as a training table for the restoration of impaired speech function in patients with aphasia, and as a seat for patients and employees of the department.

Thus, the proposed device allows to ensure the safety of independent studies to restore impaired speech function in patients with aphasia and the conditions for more effective independent studies using computer technology without separate rooms in clinics for organizing computer classes. At the same time, the conditions created for patients contribute to increasing the effectiveness of classes by providing the patient with visual isolation from the surrounding space, as well as by realizing the possibility of actively speaking aloud the materials worked out during independent classes: sounds, words and sentences, which is one of the necessary conditions for restoring impaired speech function with a number of forms of aphasia.

Claims (5)

1. Transforming table for independent classes on the restoration of speech function in patients with aphasia in a hospital setting, containing a frame made of wood, in the central part of which a tabletop is fixed, characterized in that the frame has a total height of 1600-2000 mm and a width of 1100 -1300 mm and contains a rear and two side walls rigidly connected to each other by screws, while the frame is divided into parts by the upper, central and lower jumpers, the width of which is the width of the frame minus the thickness of the side walls, and the thickness for it and two side walls, as well as the upper jumper is 20-25 mm, the thickness of the central and lower jumpers is 30-35 mm, the upper part of the frame, located above the central jumper, has a depth of 100-150 mm and is divided into separate compartments by vertical and horizontal partitions 20-25 mm thick, rigidly fastened to each other and with the back and side walls, as well as the upper and central jumpers by means of a screw connection, the lower part of the frame, located under the central and lower jumpers, has a depth of 500-600 mm and includes vertical racks 30-35 mm thick, rigidly connected by screws to the rear wall, the central and lower jumpers, the table top is movably fixed on the upper part of the central bridge by means of hinges, the width of which is equal to the width of the central bridge, and the depth is half the width of the central bridge, the front central part of the countertop is made a rectangular cutout with a width of 600-700 mm and a depth of 200-300 mm, telescopic brackets are fixed along the left and right edges of the inner side of the countertop, I connect it with the side walls of the frame, above the central bridge of the frame, two flaps are movably attached to the side walls by means of hinges, the width of each of which is half the width of the central bridge, and the height is the distance from the lower surface of the central bridge to the upper surface of the upper bridge, in the lower part Each leaf has fixing screws, which, when folding the transformer table, are screwed into metal inserts with internal thread, mounted on the end faces of the tabletop, in latches are mounted on the upper and lower parts of one of the flaps, and a lock is mounted on the side of the other flap; lamps are attached to the lower side of the upper lintel. 2. Transforming table according to claim 1, characterized in that a computer monitor is attached to the rear wall of the central compartment of the frame by means of screws, connected by cable to a mini-computer located in one of the side compartments. 3. The transformer table according to claim 1, characterized in that fasteners are fixed to the upper part of the side walls for fastening the transformer table to the vertical surface of the wall. 4. A transforming table according to claim 1, characterized in that a computer keyboard, headphones, a microphone, writing instruments, notebooks, teaching aids, a timer and other accessories used in independent studies of patients with aphasia are placed in the compartments of the upper part of the frame . 5. The transformer table according to claim 1, characterized in that the hinged seat is movably fixed to the lower jumper by means of hinges, which is fixed in horizontal position on two supports, each of which is rigidly fixed by screws on the inner surface of the side walls, and on the ends of the central and the lower jumpers are rigidly fixed to the seatback.

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