RU199336U1 - Backrest combination unit - Google Patents

Abstract

The utility model relates to structural elements of seats for compartment and reserved seat railway cars, specialized vehicles (mobile homes, mobile workshops and laboratories for various purposes), in particular, to the back supports built into the back of a sofa (bench, etc.) transformations to transform a sleeping place into a sitting place. The combined unit of the backrest of the sofa contains a backrest base and a pull-out section, while the pull-out section is made with the possibility of pulling out with all its volume and adjusting to the physique of a particular person with the possibility of fixing in various positions, while the pull-out mechanism is a scissor mechanism. The technical result is the ability to adjust the retractable section to the physique of a particular person. 1 wp f-ly, 9 ill.

Description

The utility model relates to structural elements of seats for compartment and reserved seat railway cars, specialized vehicles (mobile homes, mobile workshops and laboratories for various purposes), in particular, to the back supports built into the back of a sofa (bench, etc.) transformations to transform a sleeping place into a sitting place. Known designs of seat backs (sofas) compartment and reserved seat cars, including retractable sections, allowing you to convert a berth into a chair. These include, for example, "Backrest with armrests for the seat and bed of a rail vehicle" (DD229655A1), comprising a backrest frame, a section connected by its upper end to the backrest frame with the possibility of turning in a vertical plane, and a lower end with a swivel leash by means of a guide a groove of the section and a horizontal axis installed in the frame supports, on which armrests are unilaterally fixed, having the ability to rest on the stops of the lower part of the section extending forward. The disadvantage of the known design is the extension of the section exclusively by turning around a fixed axis. As a result, such a device is limited in terms of the function of adjusting the formed chair for a specific person, first of all, in terms of height, namely, the ability to adjust the depth of the seat and, in combination with the depth of the seat, the inclination of the retractable section is limited. As a prototype, a slightly more advanced combined unit of the back of the sofa (RU2109648C1) was selected, containing the back frame, a section connected by the upper end with the back frame with the possibility of turning in a vertical plane, and the lower end with a swivel leash through the section guide slot, and installed in the supports the frame is a horizontal axis, on which the armrests are unilaterally fixed, having the ability to lean on the stops of the lower part of the section extended forward, while between the armrest and the section is the specified frame support under the horizontal axis, on which the leash is unilaterally fixed, and the armrests have the ability to be fixed in the retracted position ... The prototype and the analogue have the same disadvantages mentioned above.

The technical problem, the elimination of which is aimed at the utility model, is the low possibilities of adjusting the sliding section to the physique of a particular person. This technical problem is solved by a combined sofa backrest unit containing a backrest base (frame) and a retractable section, in which, according to the proposal, the retractable section is made to slide out with its entire volume, with the possibility of adjusting to the physique of a particular person, with the possibility of fixing in various intermediate positions (extension depth, tilt angle), while the extension mechanism is made in the form of a scissor mechanism. The retractable section can be made with the ability to rotate in a vertical plane to provide more comfortable support for the back of the seated person. The utility model is illustrated by drawings. FIG. 1 - 3 shows the disadvantages of sofas, benches, etc. without pull-out section. FIG. 4 conventionally shows the position of the seated person with the extended movable section. FIG. 5 conventionally shows the placement of a lying person with the movable section retracted. FIG. 6 shows an example of installing one pull-out section along the length of one berth. FIG. 7 shows an example of installing two pull-out sections along the length of one berth. FIG. 8-9 show the design features of the mechanism for advancing and, accordingly, placing a seated person. Combined unit for the back of a sofa (seat, bench, shelf, locker) 1, contains a base for the back 2 and a pull-out section 3. The unit also contains a pull-out mechanism 4. Various latches, stoppers, locks, etc. any known design is assumed, adapted to the corresponding extension mechanism 4 and the design features of the backrest 2, section 3 and the combined unit as a whole. Not shown in the drawings. Often, lockers or sleeping shelves 1 are of such a width (more than 600 mm), which provides the necessary space for a lying person, but does not provide comfort for a seated person. Passenger seats are typically between 400 and 550 mm deep, so the average person can lean on the seat back and place their feet flat on the floor. If the depth of seat 1 is more than 550 mm, then the seated person will either put their feet on the floor without support with their backs on the back (Fig. 1), or, in order to lean on the back, will be forced to take a reclining position (Fig. 2), or lean on the back, but without the ability to bend the leg at the knee joint and put the feet on the floor (Fig. 3). On a narrow bunk (locker) 1 passenger will sit comfortably, but he will not have enough space to lie. The utility model allows the sliding section 3 to be installed in at least two positions: “pressed against the wall” or “extended” (Fig. 4). In the position pressed against the wall, section 3 allows a lying person to sit comfortably (Fig. 5).

Between the extreme positions ("pressed against the wall" or "pulled out") there can be intermediate ones - for tincture for the growth of a seated person (several people). The surface of the section 3, facing the back of a seated person, can be inclined towards the wall (base 2) on which it is installed. Also, the tilt can be adjusted. The retractable section 3 can be one-piece (Fig. 6) and divided into several parts, for example, into two parts on different sides of a window installed in the wall along which the bench 1 is placed (Fig. 7), or into more parts, for example, equal to the number of seats on the bench. Moreover, each part has an individual pull-out mechanism.

The scissor mechanism of extension 4 of section 3 is two links connected in the middle by a hinge (Fig. 8, 9). Two points of the mechanism are fixed rigidly on the axis according to the principle of scissors, the other four in pairs slide within predetermined limits along the support pads on the base 2 and section 3. The fixation in the required position is done manually. FIG. 8, 9 show the mechanism, placed horizontally (which does not limit or exclude other orientation of the mechanism).

Claims (2)

1. The combined unit of the back of the sofa of the vehicle, containing the basis of the back - the wall of the vehicle and the retractable section, characterized in that the retractable section is made with the possibility of extension with its entire volume and adjustment to the physique of a particular person with the possibility of fixation in various positions, while the extension mechanism is a scissor mechanism. 2. The combined unit of the back of the sofa according to claim 1, characterized in that the pull-out section is rotatable in a vertical plane.

Images