BG4746U1 - Extendable sofa-bed - Google Patents

Abstract

The utility model relates to an extendable sofa bed that converts from a sitting mode to a bed by manual control. T The movable part of the bed forms the backrest of the sofa in vertical position, which serves as bed in horizontal position. The conversion mechanism is simple and resistant to jamming, resulting in extremely reliable operation of the sofa. The extendable sofa bed can be made almost entirely of wood, thus limiting the requirements for metal. It consists of a U-shaped frame made of two arms (18, 20) and a backrest and bed module (14) located between them, movably connected to the arms (18, 20) by means of articulated means (26). Fixing elements (38) are mounted immovably on the inner side of the arms (18, 20).

Description

Field of technique

The utility model relates to a sofa bed and may find application in the design, construction and manufacture of home furniture. The sofa bed is easily converted into a bed, saving space and convenient for use in small living spaces.

Prior art

The conditions of dynamic development of cities increasingly impose the tendency to build small-sized dwellings, which are convenient both for young families and for adults who live in small-sized dwellings, with a limited area for everyday premises.

It is desirable in rooms with limited space, such as small apartments, modern studios, to have a sofa bed that takes up minimal space in both sitting and bed mode. It is also desirable that the residents of such apartments spend a relatively small amount to get the opportunity to use the functions of individual furniture. As we have already stated, given the limited useful area, users often have to look for optimization of the use of the useful area, especially from the point of view of the possibilities of the construction of the sofa bed to minimize the complexity of the mechanical elements necessary for the conversion from a sofa to a bed.

Combinations of sofa beds are known, in which, as a rule, extremely complex mechanisms are used, for example frames of hingedly interconnected levers and springs, to convert the sofa into a bed. Such mechanisms are often prone to jamming of the mechanisms when converting the sofa to a bed and vice versa, which requires precision machining of the details of the converting mechanisms. In addition, the complexity of the mentioned mechanisms also predisposes to possible injury to the person who performs the conversion, since in many cases the mechanisms and in particular the connections between them are discovered.

The prior art includes various technical solutions which are aimed at alleviating some of the aforementioned problems, but so far have not been entirely successful.

Patent publication US 2,534,177 is known, in which a combined sofa-bed seat is described, which uses a three-part backrest and cushion which, through complex connections and mechanisms, is converted into a flat bed. Between the separate parts, it is necessary to provide self-acting mechanisms, which complicates the transformation of the sofa into a bed, as small indentations are formed in the places of contact of the individual pillows, which create inconvenience and discomfort when using the bed.

US 2,597,995 discloses a combination sofa bed construction which allows the sofa to be converted into a bed, where one part of the bed is located and extends beyond the boundaries of the sofa part, with the result that the converted bed takes up more space than the normal dimensions of the sofa .

Patent publication US 3,000,598 describes a seat-bed convertible from a seat to a bed which, when the seat portion is in place, the bed extends beyond the confines of the seat portion, thereby taking up more space than just the seat part.

Patent publication US 3,327,327 is known which discloses a sofa bed in which the bed is under the seat, the seat and back being movable to allow them to be placed in position when they are to be used as a bed. The conversion mechanism is relatively complex technically, consisting of several complex levers and arms connected by a hinge, which, given its frequent use, requires a light and simplified movement when converting to a bed.

Technical nature of the utility model

Given the known state of the art in the field of technology under consideration, the task of the utility model is to offer a sofa bed, the construction of which ensures that it can be quickly and easily converted into a bed and vice versa, and the conversion is carried out without special efforts, silently, and the construction is technological, with few metal parts.

Another task of the useful model is to provide a sofa bed in which storage space for mats, pillows, clothes is provided.

Another task of the utility model is to increase the functionality of the sofa bed by providing electric accessories in the sofa bed that can be used in both modes of use of the furniture - sofa and bed.

Still another objective of the utility model is to provide a low-cost furniture module that can be used in currently available compact apartments, where the use and operation of the furniture module requires minimal floor space.

The task of the utility model is solved with a sofa bed consisting of a U-shaped frame including a pair of arms oriented parallel to each other, a backrest and a seat cushion located between said arms, and a module including a backrest surface and a bed surface, located between the pair of parallel arms.

According to the useful model, hinge means are mounted on the inner side of the pair of arms, which contact the short wall of a rectangular back-bed module, which are located in one plane with the back-bed module, its axis of rotation being midway between the sides of the module so that said module is balanced with respect to the hinge means, a pair of fixing elements being mounted on the inner, rear portion of the arms, disposed flush with the hinge means, wherein a pair is immovably fixed to the lower part of the vertically oriented module latches located at the ends of the long side of the bed backrest module, which is located above said seat cushion.

The hinge assemblies are located between the module and the arms, and the backrest surface and the bed surface are oppositely located on said module.

The module is located within the limits defined by the distance between said shoulders and the seat cushion when the module is in bed mode.

The surface of the backrest and the surface of the bed consist of opposite sides of a supporting flat element.

The backrest is independently movable from the seat cushion.

The module further includes locking means for locking said module in sitting mode and bed mode.

The bed surface includes a means of retaining a conventional single mattress.

Additionally includes storage facilities located under said seat cushion in both modes.

The bed surface includes fixed frame members forming a rectangular recess sized to accommodate a conventional single mattress therein and means for retaining said mattress in said recess in a seated position.

According to the utility model, means are additionally provided for locking the module in bed mode.

The locking means further includes means for maintaining said member in said bed mode.

The arms, seat and module are made of non-metallic elements.

At least one of the arms is provided with a power hub to which accessories built into the arm are connected. As accessories, a lamp with a flexible arm, a radio with a speaker and others can be used, according to the user's choice.

The pull-out sofa-bed features a simple and functional design, being suitable to be installed in a space with limited access and allowing it to be used as a sofa and a bed. It is pertinent to note that the back and bed unit, when moved into and locked in bed mode, is located within the side arms and seat, i.e. when converting the sofa into a bed, there is no additional expansion and taking up additional space. The seat is shaped and positioned in a way that allows it to be removed for cleaning, but at the same time it can remain stationary without the need to move or stick out from the sofa bed.

The design of the sofa bed allows the backrest to be installed flush with the wall. In addition, as long as there are no elements that form a projection to extend the bed forward, outside the frame of the sofa bed, there should be only minimal floor space in front of it. In addition, the structural design of the arms with the possibility of mounting the accessories on them provides a complete furniture module that can be mounted flush and on the side wall, further optimizing the use of space.

Another important aspect of the sofa bed is that the construction of the sofa bed can be essentially all wood or a wood/plastic composite, such as pressed board, with only the locking members, locking plates and hinge assemblies including metal members. If necessary, an additional metal frame can be used, through which the plates of the locking nodes can be connected, as well as providing additional support for the bed to the floor.

According to a variant embodiment of the utility model, a lamp and a radio are mounted to one arm, thus the sofa bed serves as a complete furniture module, where not only a sofa and a bed are designed with the module, but also electrical accessories that are an integral part of the sofa bed.

Explanation of the attached figures

The sofa bed according to the utility model is presented in more detail by means of the drawings accompanying the description, where:

figure 1 presents an axonometric front view of the sofa bed;

Figure 2 is a top view of the rear of the module of Figure 2. 1;

figure 3 is a side view of the module;

Figure 4 is a front perspective view of the sofa bed converted into a bed;

Figure 5 is a partial view of a locking mechanism used to lock the sofa bed; and Figure 6 is a partial axonometric front view of a variant embodiment according to the utility model showing the sofa bed with additional equipment and electrical outlet.

An example implementation of the utility model

Further in the description, exemplary embodiments of a pull-out sofa bed according to the utility model are presented, and other embodiments, forms and modifications containing the idea and falling within the scope and spirit of the claims will be readily realized by those skilled in the art.

In fig. 1 depicts a sofa bed 10, subject of the utility model. The sofa bed 10 consists of a U-shaped main frame 12 with a backrest and bed unit 14 located within the main frame. On the central part of the main frame 12 is located a removable cushion 16, preferably made of porous rubber, intended to be used as a seat. The main frame 12 consists of several parts, namely first and second side arms 18 and 20 which are fixedly connected to the front surface 22 respectively.

The front surface 22 gives additional strength to the frame structure of the box 21, which is formed by a front surface 22, an upper surface 23, a rear surface 24 and a lower surface 25. The front surface 22 is filled with two drawer doors 27, with handles 27A, as in this way, a storage area 27B is formed, intended for example for storing bed linen, clothes.

The first side arm 18 and the second side arm 20 are immovably attached to the two ends of the front surface 22, respectively, in which the U-shaped frame 12 is constructively formed.

In the U-shaped frame 12, the backrest and bed module 14 is installed.

On the inner surface of the two arms 18 and 20, a pair of hinged units 26 are symmetrically located, which support the backrest and bed module 14, with the possibility of its rotation.

The front part of the backrest and bed unit 14 is made up of a covering element, for example a supporting element 28 /flat element - board/, with a quilted surface 30 attached to the supporting board 28. Opposite the quilted surface 30 is a shaped opening formed by interconnected side boards 32A, 32B, 32B and 32D. A handle 34 is formed in the side board 32A, preferably located centrally along the length of the board 32A.

A pair of latches 36 are mounted in the low portion of the support member 28 which engages a first locking member 37 located in the lower portions of the respective inner surfaces of the two side arms 20 and 18.

A second pair of locking elements 38 is located on the rear of the inner surface of the two side arms 20 and 18, in the same plane as the hinge assemblies 26, and are located rearward of the first pair of fixing plates 37.

When the sofa bed is used in sofa mode, i.e. as a piece of furniture in which the backrest module 14 is in a vertical position, the lower part of the support element 28 rests and is fixed in a vertical position by the mounted locks 36.

In fig. 2 and fig. 3 shows the back of the sofa bed 10 and, in particular, the mutual arrangement of the side arms 18 and 20 relative to the back and bed unit 14. The hinge assemblies 26 are mounted to the sides 32B and 32B of the back and bed unit 14, with the possibility of its rotation. In the opening formed by the interconnected side boards 32A, 32B, 32B and 32G is placed a bedding set 40 formed between the sides 32A-32G of the back and bed unit 14.

The bedding set may consist of a pair of pillows 42 and bedding 42A, such as a mattress, sheets and covers, placed in the opening and fixed by a pair of partition strips 43. The ends of a pair of strips 43 are fixedly fixed to the inner surfaces of the sides 32A and 32G . In addition, buckles 43A are removably and adjustably mounted on the partition webbing straps 43, which are of the type used in the interior of suitcases, i.e. with well-known construction. It is also appropriate to clarify that pillows or other items of bedding, excluding the mattress, may be stored in area 27B.

The above states that when the module 14 is in sofa mode, ie. in a vertical position, as a backrest, the bedding is hidden from the view of the users or their guests in the front of the sofa.

In fig. 3 and 4 shows how the backrest and bed assembly 14 is rotatably attached to the side arm 18 by one of a pair of pivot assemblies 26 as shown in cutaway. In fig. 3 the access drawers 27 are presented in an open position allowing the reception of mats or other accessories.

One of the pair of latches 36 and in the same area as the latches 36 is the first locking plate 37. The latches 36, which can also be implemented as latches, and the first locking plates 37 are actively engaged when the backrest and bed 14 are in a substantially vertical position , as shown in Fig. 3.

The seat cushion 16 is located within the arms 18 and 20 and the U-shaped frame, whereby the entire module 14 is located within the same limits (Fig. 4). One of the pair of latches 36 is also shown and in the same area as the latches 36 is the first locking plate 37. When in the horizontal position, the latches 36 engage the second pair of latching plates 38. In FIG. 4 shows the bulkhead straps 43 removed to allow unobstructed access to the pillows 42 and bedding 40 for use or removal for storage.

According to the utility model, it is recommended that the bedding accommodated and retained by the baffle straps at sides 32A-32G be a complete set and include a conventional single mattress, fitted sheet, pillowcase and, if necessary, also pillows. Pillows or other bedding may be stored in access or storage areas 27.

In the presence of the conditions described above, the user is free to manually rotate the back and bed module 14 around the pair of hinge assemblies 26 - from the vertical position /fig. 3/, in the horizontal position /fig. 4/, and the rotation can be done by pulling the handle 34. Releasing the handle 34 allows each bolt 44, under the pressure of a spring 46, to grip the second pair of locking plates 38. When the second pair of locking plates 38 is fully fixed, the assembly for backrest and bed 14 is now locked in position - bed mode. The bed, when locked in place, is supported by the lock plate members 38.

The sofa bed is designed so that the backrest and bed 14 can be balanced about the pair of hinge assemblies 26 so that minimum force is required to be exerted by a person converting from a sofa to a bed and from a bed to a sofa. When the seatback and bed 14 are locked in the sofa position, people sitting on the seat cushion 16 can lean back or inadvertently pull forward on the unit 14 without it moving from its locked position. After the backrest and bed 14 are locked in the bed position, the pair of straps 43 is now disconnected and removed from the bed area, as best seen in FIG. 4, where the pair of straps 43 is shown hanging over the edge of the back and bed assembly 14.

In fig. 6 shows an alternative embodiment of the pull-out sofa-bed. Referring to the embodiment of FIG. 6 shows a unit having similar structural elements to those shown in FIG. 4, such as elements 120, 127, 132A, 143, 140 and 142 of FIG. 6 fully correspond to similar elements 20, 27, 32A, 43, 40 and 42 of the embodiment of FIG. 4.

A variant embodiment also includes a power cord 50 that provides power to a power hub 52 located on the lower interior of the side arm 120. An adjustable lamp, e.g., a gooseneck type 54 is attached to the uppermost, narrow surface of the side arm 120. The lamp 54 includes a lampshade or reflector 56 attached thereto. The lamp 54 is connected to the power center 52 by wiring 58.

Additionally, on the uppermost surface of the side arm 120 is flush-mounted a radio 60 connected to a speaker 62 similarly mounted. The electrical connection between the radio 60 and the speaker 62 is made through a cable connection 63. Wiring 64 provides power to the radio 60 from the power center 52.

An alternate position 66 illustrates the position of the gooseneck lamp 54 when the sofa bed 10 is used as a couch. Thus, lamp 54 serves as a reading lamp in both sitting and bed modes. The power center is mounted in the arm for aesthetic and safety purposes, as well as to allow a built-in sofa bed for optimal use of space. In this way of construction, the sofa bed serves as a complete furniture unit, where not only the sofa and bed are designed with the unit, but also electrical accessories such as radio and lamp are an integral part of the sofa bed.

Claims (11)

1. A sofa bed comprising a U-shaped frame including a pair of parallel arms, a backrest and a seat cushion located between said arms, and a unit including a backrest surface and a bed surface located between the pair of parallel arms , characterized in that hinge means (26) are mounted on the inside of the pair of arms (18, 20) which contact the short wall of a rectangular back and bed module (14) which are located in one plane with the module backrest and bed (14), its axis of rotation being midway between the sides of the backrest and bed assembly (14), so that said assembly is balanced with respect to the hinge means, such as on the inner, rear part of the arms (18, 20) a pair of fixing elements (38) are installed, located in one plane with the hinge means (26), whereby in the lower part of the vertically oriented backrest and bed module (14) a pair of locks (36) are immovably fixed, located at the ends of the long side of the backrest and bed unit (14) which is located above said seat cushion (16). 2. A sofa bed according to claim 1, wherein said hinge means (26) are located between the back and bed unit (14) and the arms (18, 20) and the back surface and the bed surface are oppositely located on said back unit and bed (14). 3. A sofa bed according to claim 1, wherein the back and bed unit (14) is located within the limits defined by the distance between said arms (18, 20) and the seat cushion (16) when the back and bed unit (14) is in bed mode. 4. A sofa bed according to claim 2, characterized in that the surface of the backrest and the surface of the bed are located on opposite sides of a supporting element (28). 5. A sofa bed according to claim 1, characterized in that the backrest of the backrest and bed unit (14) is independently movable from the cushion (16) of the seat. 6. A sofa bed according to claim 1, characterized in that the surface of the bed is implemented as a conventional single mattress. 7. A sofa bed according to claim 1, characterized in that it further includes storage means (27) located under said seat cushion (16) in both modes of the backrest and bed unit (14). 8. A sofa bed according to claim 1, characterized in that the bed surface includes fixed frame members forming a rectangular recess sized to accommodate a conventional single mattress therein and means for retaining said mattress in said recess in a seated position. 9. A sofa bed according to claim 1, wherein said latches (36) contact means for fixing the back and bed unit (14) in bed mode. 10. A sofa bed according to claim 1, wherein said arms (18, 20), seat (16) and backrest and bed unit (14) are made of non-metallic construction and elements. 11. A sofa bed according to claim 1, characterized in that said arms (18, 20) are made of wooden elements forming a hollow body, in which at least one of the arms (120) has a built-in power supply (52) to which connected a lamp (54) and a radio (60) located on the upper narrow part of the arm (120), said lamp (54) including means for moving from a first position to a second position and an electrical wire (58) connecting said lamp to power supply (52), and the radio (60) is connected by means of electrical cables respectively through a cable (64) to the power supply (52) and through a second cable (63) to a speaker (62) also mounted on the upper narrow part of the arm (120) .