Lift-up bed with a folding sofa

Abstract

The utility model relates to the field of household furniture. A lifting wardrobe bed with a self-folding sofa is proposed, configured to fold and unfold the sofa when moving the bed from a vertical stowed position to a horizontal unfolded position and back, respectively, and comprising a sofa frame, a sofa seat, a sofa back and side armrests; wherein the sofa frame contains two sofa frame brackets-rods, which represent the side parts of the sofa frame, wherein the brackets-rods are pivotally connected to the posts and to the side profiles of the bed frame, wherein the upper axes of the hinged connections of the posts with the brackets-rods are offset backwards relative to the axes of the hinged connections of the posts with the lower support of the sofa, wherein the posts are configured to rotate in the direction of the foot of the bed when folding the sofa; moreover, the side armrests are fixed on console brackets on the sides of the sofa frame close to the sides of the bed;Moreover, in the vertical, stowed position of the bed, the brackets-pulls of the sofa frame rest at their rear against a rectangular bracket for fastening the bed frame to the fixed side supports, and the side armrests are designed to move together with the sofa frame when folding and unfolding the sofa. The technical result consists in increasing the safety and ease of use of the self-folding sofa design. 4 pp. fil., 6 fig.;

Description

[0001] Field of technology to which the utility model belongs

[0002] This utility model relates to household furniture, and specifically to sofas for transformable lift-up wardrobe beds. More specifically, the utility model relates to an automatic, self-folding sofa mechanism for a transformable lift-up wardrobe bed with height adjustment and automatic locking in the closed position.

[0003] Technology Level

[0004] There are known designs of lift-and-fold wardrobe beds with sofas, which can be used in rooms with a small area due to the ability to move (fold and lift) the bed from a retracted vertical position to an unfolded horizontal position and back, with the simultaneous unfolding and folding of the sofa, which is connected to such a bed or forms part of it.

[0005] Thus, in the source RU 203105 U1 (Pantyukhov A.V., published on 03 / 22 / 2021) a transformable wardrobe bed with a sofa and automatic unfolding is disclosed, comprising a frame, a folding bed, a sofa with a sliding seat, back and sides, a transformation mechanism, gas shock absorbers, folding support legs, while the bed is fixed in the folded position due to the presence of a locking device located on the frame and the bed, and the sofa transformation mechanism is made in the form of a rectangular hinge joint fixed on a support frame, with a rigid lever connected to the bed, and the rigidity of the gas shock absorbers is designed to compress under the weight of the sofa seat and the bed.

[0006] The disadvantages of this known solution include the presence of fixed armrests rigidly attached to the support frame, which complicates access to hidden storage compartments in the bed frame when the bed is closed. Access to these compartments is only possible from the inside via a folding shelf, requiring additional movable fastening elements for such a shelf. Furthermore, this known solution for folding the sofa uses a single central lever, attached to one side of the bed frame and the other to the sofa frame. The lever lowers the sofa frame when the bed is folded. The need to move the lever between the cushions during unfolding requires sufficient clearance between the cushions, which complicates operation and leads to wear of the sofa fabric due to friction between the lever and the sides of the cushions.In addition, using one central lever-pull instead of two can lead to the sofa frame becoming skewed and jammed when folded, which necessitates the installation of additional rigid four-link hinge joints between the support frame and the sofa frame, located on both sides of the sofa frame, complicating the design.

[0007] The sofa design of the known sofa requires sufficient clearance between the armrests and the seat and slat. This is because when the sofa is folded, the armrest remains stationary, while the seat and slat move relative to the armrest. If the clearances are not maintained or the sofa's hinges are worn, the ends of the seat and slat will inevitably rub against the armrest when folding. If the clearances are too large, foreign objects may become trapped, which could impair the operation of the sofa's folding mechanism. Furthermore, in the known design, the fixed armrests protrude above the bed surface when used in the unfolded position and are significantly deep, preventing side access along almost the entire length of the bed, with the exception of the footboard.

[0008] Source RU 204141 U1 (Kononov V.S., published 11.05.2021) discloses a folding bed comprising a sleeping area and a sitting area formed by a backrest and a seat, wherein the sleeping area is capable of rotating around a horizontal axis from a vertical position to a horizontal position, the backrest is rigidly attached to the sleeping area, and the seat is capable of moving away from said horizontal axis when the sleeping area is rotated from a vertical position to a horizontal position, for which purpose the folding bed is provided with a four-link hinge mechanism, in which two upper hinges are mounted on the seat, and two lower hinges are fixedly mounted relative to the axis of rotation of the sleeping area, and a partition is rigidly attached to the link of the four-link hinge mechanism, which connects the upper and lower hinges, remote from the axis of rotation of the sleeping area, preventing access to the space under the sitting area.

[0009] The disadvantages of this known solution include its complex design, as the folding sofa frame has multiple movable four-link hinges, beams, and posts, consisting of more than 22 individual interconnected elements. A separate rod connected to the rear post is used to lower the sofa frame. Furthermore, this known solution does not address the potential for foreign objects to enter the space under the sofa seat from the sides, as the design lacks armrests or any other protective side plates or elements to prevent foreign objects from entering the space under the seat from the sides of the sofa frame.

[0010] Source RU 198778 U1 (August DSG LLC, published July 28, 2020) describes a design for a folding bed with a sofa. The design consists of a bed frame, swiveling on two fixed supports symmetrically positioned relative to the frame, and a sofa frame. The sofa frame is attached to the bed frame using consoles hinged at one end to the inside of the side elements of the bed frame and rigidly attached to the sofa frame at the other end. Disadvantages of this known solution include the need for separate consoles attached to the sofa frame, which complicates the design; the inability to adjust the sofa's height; and the need to remove the armrests built into the seats before folding the bed, which increases the number of preparatory steps required before actually folding the bed.Furthermore, in the existing solution, the consoles are located on the inside of the frame, requiring the creation of grooves or cuts in the bed frame or the creation of separate panel elements. Other disadvantages of this existing solution include the heavy weight of the structure and the need for secure connections and periodic inspection to ensure safe operation of the bed.

[0011] The known solution according to source RU 198778 U1 can be considered as the closest analogue (prototype) of the proposed utility model.

[0012] Disclosure of Utility Model

[0013] The technical problem that the proposed utility model is aimed at solving is the complexity of the design of known transformable wardrobe beds with sofas and the difficulty of their operation due to the need to perform additional actions for folding and unfolding the sofa, as well as the risk of injury when folding and unfolding the bed and sofa due to the complexity of the design and the need to simultaneously control the position of different parts of the structure, which have significant weight.

[0014] The problem solved by this utility model is to create a self-folding sofa design for a transformable lift-up wardrobe bed that eliminates the shortcomings of the prior art solutions discussed above. Furthermore, the problem is solved by expanding the range of technical means—self-folding sofa designs for transformable lift-up wardrobe beds.

[0015] The technical result achieved by implementing the proposed utility model consists of improving the safety and ease of use of the self-folding sofa. Furthermore, the design of the self-folding sofa is simplified compared to prior art solutions.

[0016] In accordance with the utility model, a self-folding sofa for a transformable lifting cabinet bed is proposed, made with the ability to fold and unfold when moving the bed from a vertical retracted position to a horizontal unfolded position and back, respectively, and containing a sofa frame, a sofa seat, a sofa back and side armrests; wherein the sofa frame contains two brackets-thrusts of the sofa frame, which are the side parts of the sofa frame, wherein the brackets-thrusts are pivotally connected to the posts and to the side profiles of the bed frame, wherein the upper axes of the hinged connections of the posts with the brackets-thrusts are shifted backwards relative to the axes of the hinged connections of the posts with the lower support of the sofa, wherein the posts are made with the ability to rotate in the direction of the foot of the bed when folding the sofa; moreover, the side armrests are fixed on console brackets on the sides of the sofa frame close to the sides of the bed;wherein, in the vertical, stowed position of the bed, the brackets-pull-rods of the sofa frame in their rear part rest against the rectangular bracket for fastening the bed frame to the fixed side supports, and the side armrests are designed with the ability to move together with the sofa frame when folding and unfolding the sofa.

[0017] In particular, in the proposed utility model, the back of the sofa is connected to the bottom surface of the bed and is configured to be lowered when the bed is unfolded and raised when the bed is folded. Specifically, when the sofa is folded, the rear surface of the back of the sofa is positioned substantially flush with the top surface of the sofa seat.

[0018] In particular, in the proposed utility model, the side armrests are designed to lower along with the sofa seat when the bed is unfolded and to rise along with the sofa seat when the bed is folded. Specifically, in the proposed utility model, the sofa frame brackets and uprights are provided with adjustment holes, allowing the sofa frame to be set in at least two different height positions.

[0019] Brief description of drawings

[0020] The drawings in this document are provided to facilitate understanding of the utility model. The drawings are schematic and not drawn to scale. They are for illustrative purposes only and are not intended to determine the scope of legal protection for the utility model.

[0021] Fig. 1 shows a schematic side view of the sofa according to the proposed utility model in the unfolded position (the bed is in the vertical folded position).

[0022] Fig. 2 shows a schematic side view of the sofa according to the proposed utility model in the folded position (the bed is in the horizontal unfolded position).

[0023] Fig. 3 shows a schematic perspective view of a sofa according to the proposed utility model with a bed in a horizontally unfolded position (the bed mattress is not shown, only the bed frame is shown).

[0024] Fig. 4 shows a schematic perspective view of a sofa according to the proposed utility model in the unfolded position (the bed is in the vertical folded position).

[0025] Fig. 5 shows a schematic perspective view of the sofa frame when the sofa is in the unfolded position.

[0026] Fig. 6 illustrates (using arrows) the distribution of the load on the sofa structure in the unfolded position.

[0027] Implementation of a utility model

[0028] The proposed utility model relates to the design of a self-folding sofa for a transformable wardrobe bed, the main components of which are a bed, designed with the ability to move from a vertically stowed position to a horizontally unfolded position and back, and a sofa, which is designed with the ability to fold when moving the bed to a horizontally unfolded position and unfold when moving the bed to a vertically stowed position, respectively.The sofa essentially consists of a sofa seat, comprising a sofa frame, and a sofa back. The sofa frame is connected to the bed frame and the bed folding and unfolding mechanism such that, when the bed is moved from a vertically stowed position to a horizontally unfolded position, the sofa frame with the sofa seat located thereon is lowered downward, and the sofa back rotates from a substantially vertical position to a substantially horizontal position, being connected to the lower surface (front) of the bed. When the bed is moved to a vertically stowed position, the sofa back rotates (with the bed rotating) from a substantially horizontal position to a substantially vertical position, and the sofa frame with the sofa seat located thereon is raised upward. This enables the sofa to be folded and unfolded in a single motion, with the sofa located above the floor surface, ensuring its ease and safety of use.At the same time, the sofa is fixed in the unfolded position (and the bed is in the vertical folded position, respectively) in such a way that the accidental folding of the sofa (and unfolding of the bed) when impacting the seat or back of the sofa is excluded and, accordingly, the risk of injury is reduced and the safety of using the sofa is increased.

[0029] In the drawings (Fig. 1-6), the structural elements of the sofa and bed are designated by the following reference positions:

[0030] 1 - sofa back;

[0031] 2 - sofa seat;

[0032] 3 - side armrest;

[0033] 4 - bed;

[0034] 5 - sofa frame crossbar;

[0035] 6 - bed frame;

[0036] 7 - racks;

[0037] 8 - bed frame support;

[0038] 9 - bed frame bracket;

[0039] 10 - wall-mounted box for placing a bed in a vertical, folded position;

[0040] 11 - sofa frame brackets-pull rods;

[0041] 12, 13 - height adjustment holes;

[0042] 14 - rear part of the sofa frame bracket-pull;

[0043] 15 - lower support of the sofa.

[0044] Referring to the drawings, in accordance with the proposed utility model, the self-folding sofa for a transformable wardrobe bed contains the following main parts: a backrest 1 of the sofa, a seat 2 of the sofa, left and right side armrests 3. The mechanism for folding and unfolding the self-folding sofa is based on the sofa frame, which generally consists of side brackets-rods 11 of the sofa frame, rigidly connected by at least two crossbars 5, ensuring the parallelism of the arrangement of the brackets-rods 11 of the sofa frame in the design of the sofa frame.In the front part (that is, closer to the foot of the bed), the brackets-rods 11 of the sofa frame rest on the posts 7, which are pivotally connected in their upper part to the brackets-rods 11 of the sofa frame, and in the lower part - to the lower support 15 of the sofa, which is a horizontally located frame made of at least two sidewalls, rigidly connected by at least two crossbars and resting on the floor in any (folded or unfolded) position of the sofa.

[0045] As shown in the drawings, the bed 4 is configured to move between a vertically retracted position and a horizontally unfolded position and generally comprises a bed frame 6 on which a bed mattress (not shown) is placed, brackets 9 of the bed frame located on the sides for the hinged connection of the bed frame 6 with fixed side supports of the bed, which can be part of a wall box 10 for placing the bed in a vertically retracted position.

[0046] Furthermore, as can be seen in Fig. 5, at the rear (facing the brackets 9 of the bed frame) end of each of the bracket-rods 11 of the sofa frame, a rear part is provided (shown at 14 in Fig. 5), which is designed to rest against the corresponding bracket 9 of the bed frame in the unfolded position of the sofa to prevent accidental folding of the sofa or unfolding of the bed, respectively.

[0047] Folding and unfolding the sofa is accomplished by rotating (folding) the posts 7 outward with respect to the structure of the sofa frame, and more specifically, in the direction of the foot of the bed, due to which the frame 5 of the sofa, resting on them, moves downwards or upwards with respect to the lower support 15 of the sofa, located on the floor. In this case, in the folded position of the sofa, the seat 2 of the sofa is preferably located above the floor surface (at least to the height of the lower support 15 of the sofa), and in the unfolded state of the sofa, the seat 2 is raised to a height sufficient to provide access to the space under the seat 2 of the sofa.

[0048] In the posts 7, openings are made for a hinged connection with the bracket-rods 11 of the sofa frame, which (and, accordingly, the axes of the hinged connections passing through the said openings) in the unfolded position of the sofa are located with an offset to the rear (inside the structure of the sofa) relative to the openings for the hinged connection (and, accordingly, the axes of the corresponding hinged connections passing through these openings) of the posts 7 with the lower support 15 of the sofa, due to which (see Fig. 6) a trapezoid is created in the cross-section with parallel upper and lower sides and four fixed points of load distribution, while the upper side of the trapezoid is shorter in length than the lower side.In other words, the posts 7 have such a design that the openings for the hinges in the posts 7 for the hinged connection of the posts 7 and the brackets-rods 11 of the sofa frame are, respectively, shifted towards the bed frame (inside the structure of the sofa frame, or otherwise - in the direction of the horizontal axis around which the bed rotates, moving between the unfolded and stowed positions) relative to an imaginary vertical line constructed along the axis of the opening for the lower hinge connection, that is, for connecting the posts 7 with the lower support 15 of the sofa in the lower part of the posts 7.

[0049] Due to the aforementioned offset of the upper hinge joint relative to the lower hinge joint at the posts 7, any load on the sofa frame, including the dead weight of the sofa frame and the seat cushions 2 of the sofa, prevents the spontaneous (accidental) opening of the bed or the folding of the sofa, or the creation of any unintended impact during the operation of the sofa aimed at opening the bed or folding the sofa. In the folded position of the sofa, the posts 7 are located substantially horizontally with respect to the floor and / or to the lower support 15 of the sofa and are directed outward with respect to the structure of the sofa (i.e., towards the foot of the bed, respectively). The above-described design increases the safety and ease of use of the sofa structure. Moreover, such a design is distinguished by its simplicity in comparison with the design of similar elements proposed in the closest analogue of the proposed utility model discussed above.

[0050] Furthermore, in accordance with the proposed utility model, the sofa is height-adjustable without the use of additional structural elements. Height adjustment is achieved using height-adjustable openings 12 and 13 in the posts 7 and the rod brackets 11, by means of which the sofa frame can be connected to the posts 7 and the brackets 9 of the bed frame, respectively, in at least two different height positions, depending on the user's preferences.

[0051] According to the proposed utility model, the sofa comprises left and right side armrests 3, which are rigidly fixed to brackets-rods 11 of the sofa frame, wherein the side armrests 3 are located on the sides of the bed when the bed is unfolded. Due to the rigid connection with brackets-rods 11 of the sofa frame, the side armrests 3 are configured to move downwards and upwards together with the sofa frame when folding and unfolding the sofa, respectively. When the bed is horizontally unfolded, the side armrests 3 are located close to the bed (in particular, to its frame 6 and / or the mattress placed on it) with substantially no gaps between the armrests and the sofa or bed, respectively. With this arrangement, the side armrests 3 do not interfere with the unfolding of the bed and sofa, which eliminates the need to remove or move the side armrests 3 immediately before unfolding the bed or folding or unfolding the sofa.This ensures the ease and safety of operation of the self-folding sofa design in accordance with the proposed utility model.

[0052] The rigidity of the connection of the side armrests 3 is ensured by their direct connection to the side brackets-rods 11 of the sofa frame, which reduces the number of prefabricated elements of the sofa structure, thereby simplifying the overall design of the self-folding sofa in accordance with the proposed utility model, and prevents their accidental displacement and / or movement relative to the frame of the sofa or bed, respectively. In turn, the brackets-rods 11 of the sofa frame are configured to move within the gap (which is, as a non-limiting example, about 15 mm) between the brackets 9 of the bed frame and the front of the bed 4.

[0053] As can be seen in Fig. 3, supports 8 are attached to the frame 6 of the bed, which are designed to be able to rotate to a vertical position when the bed is unfolded and provide support for the bed structure in the area of ​​the foot of the bed in its horizontal unfolded position.

[0054] The holding of the bed in the stowed position and the sofa in the unfolded position, respectively, is achieved due to the fact that the rear parts 14 of the brackets-rods 11 of the sofa frame in the stowed position of the bed (the unfolded position of the sofa) rest against the fixed rectangular brackets 9 of the hinge for fastening the frame 6 of the bed to the fixed rectangular brackets 9 attached to the side supports of the wall box 10. This fixes the sofa in the unfolded position and prevents accidental unfolding of the bed (folding of the sofa), thus increasing the safety of the operation of the sofa structure, while no special mechanisms are required to fix the sofa mechanism in the unfolded position, and the need to perform any additional operations to fix the sofa mechanism in the unfolded position, and the bed in the vertical stowed position, respectively, is eliminated.

[0055] Preferably, the side armrests 3 do not protrude in height beyond the upper surface of the bed (beyond the plane of the mattress lying on the bed) in its unfolded position.

[0056] As a non-limiting illustrative example, the self-folding sofa design according to the proposed utility model operates as follows. To move the bed from its vertically stowed position to its horizontally unfolded position, the user applies a slight physical force to the bed 4, directing its upper portion (the foot of the bed in its horizontally unfolded state) downward. In this case, the bed 4, essentially under the force of its own weight, smoothly moves from the vertically stowed position to the horizontally unfolded position, with the smooth movement ensured by gas springs connected to the bed frame brackets 9 on both sides of the bed.

[0057] When moving the bed from the vertical stowed position to the horizontal unfolded position, the backrest 1 of the sofa, connected to the bed 4, rotates around the horizontal axis of the backrest base from a substantially vertical position to a substantially horizontal position, becoming substantially flush with the surface of the seat 2 of the sofa. In this case, the seat 2 of the sofa moves downwards due to the movement of the sofa frame, which is realized by turning the posts 7 on both sides of the sofa frame to a position substantially parallel to the horizontally located lower support 15 of the sofa (see Fig. 2). The movement of the seat 2 of the sofa opens up space for placing the backrest 1 of the sofa in a substantially horizontal position. The side armrests 3, rigidly connected to the brackets-rods 11 of the sofa frame, as described above, also move simultaneously with the seat 2 of the sofa.

[0058] When moving the bed 4 from the horizontal unfolded position to the vertical stowed position, the user applies a small force to the bed 4 in the area of ​​its footboard to move the bed 4 upward, whereby the bed smoothly moves upward, rotating around the horizontal axis of the corresponding hinge, using gas springs (not shown), until it reaches the vertical stowed position. As a specific, non-limiting example, in the vertical stowed position, the outer plane of the bed 4 is flush with the outer surface of the wall box 10, which forms a niche for placing the bed in the vertical stowed position. In other embodiments, instead of the wall box 10, for example, two cabinets to which brackets 9 are attached can also be used, wherein the cabinets themselves are rigidly attached to the wall or to the floor.When moving the bed to the vertical stowed position, the backrest 1 of the sofa moves from the stowed horizontal position to a substantially vertical position, and the seat 2 of the sofa rises upward (and, possibly, also slightly backward) until reaching the corresponding height position, set by the connection of the posts 7 with the bracket-rods 11 of the sofa frame in the selected position by means of the adjustment holes 12, 13. The side armrests 3 of the sofa also move together with the sofa frame due to their rigid connection with the bracket-rods 11 of the sofa frame, as described above.

[0059] When unfolding the bed and folding the sofa, there is no need to install / remove the side armrests, backrest, or seat of the sofa or perform complex movements to ensure the folding / unfolding of the bed and sofa, respectively. There is also no need to lock the folding / unfolding mechanism of the bed and sofa, respectively, after the folding / unfolding is complete, while the physical strain on the user is minimal. This prevents the accidental (unintentional) unfolding or folding of the bed and sofa, either under the weight of the bed and sofa themselves or due to any physical impact.

[0060] The design described above is simplified in comparison with known analogues from the state of the art, while ensuring safety and increased ease of use of the design of a self-folding sofa for a transformable wardrobe bed due to the essential features of the proposed utility model described above.

Claims

1. A lifting wardrobe bed with a self-folding sofa, designed with the ability to fold and unfold the sofa when moving the bed from a vertical stowed position to a horizontal unfolded position and back, respectively, and containing a sofa frame, a sofa seat, a sofa back and side armrests; wherein the sofa frame contains two sofa frame brackets-rods, which are the side parts of the sofa frame, wherein the brackets-rods are pivotally connected to the posts and to the side profiles of the bed frame, wherein the upper axes of the hinge connections of the posts with the brackets-rods are offset backwards relative to the axes of the hinge connections of the posts with the lower support of the sofa, wherein the posts are designed with the ability to rotate in the direction of the foot of the bed when folding the sofa; wherein the side armrests are fixed to the console brackets on the sides of the sofa frame close to the sides of the bed;wherein, in the vertical, stowed position of the bed, the brackets-pull-rods of the sofa frame in their rear part rest against the rectangular bracket for fastening the bed frame to the fixed side supports, and the side armrests are designed with the ability to move together with the sofa frame when folding and unfolding the sofa.

2. A lifting wardrobe bed with a self-folding sofa according to claim 1, characterized in that the back of the sofa is connected to the lower surface of the bed and is designed to be lowered when the bed is unfolded and raised when the bed is folded.

3. A lifting wardrobe bed with a self-folding sofa according to paragraph 2, characterized in that, in the folded position of the sofa, the rear surface of the back of the sofa is flush with the upper surface of the sofa seat.

4. A lifting wardrobe bed with a self-folding sofa according to claim 1, characterized in that the side armrests are designed with the ability to be lowered together with the sofa seat when unfolding the bed and raised together with the sofa seat when folding the bed.

5. A lifting wardrobe bed with a self-folding sofa according to paragraph 1, characterized in that the brackets-rods of the sofa frame and the stands are provided with adjustment holes that allow the sofa frame to be installed in at least two different height positions.

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