Transformable three-section furniture for sitting or laying
The transformable three-section furniture addresses the issue of limited horizontal movement by using frame and seat locks with limiting surfaces to stabilize the sections, enhancing rigidity and preventing loosening, ensuring stable positions in both sofa and bed configurations.
Patent Information
- Authority / Receiving Office
- RU · RU
- Patent Type
- Patents
- Current Assignee / Owner
- OBSHCHESTVO S OGRANICHENNOJ OTVETSTVENNOSTYU ZHIVYE DIVANY
- Filing Date
- 2026-02-04
- Publication Date
- 2026-07-07
AI Technical Summary
Existing transformable three-section furniture for sitting or lying suffers from limited horizontal movement of the movable section, which functions as a seat, leading to discomfort and loosening of the furniture mechanism under heavy loads.
The furniture incorporates a frame with three sections, including a first and second section acting as a backrest and a third section as a seat, with at least two locking devices comprising a frame lock and a seat lock, each with limiting surfaces to restrict horizontal movements of the sections, ensuring stability and rigidity in both folded and unfolded positions.
The solution enhances the fixation of furniture sections in both positions, reducing movement relative to the frame, thereby preventing loosening and providing additional rigidity and stability, ensuring a stable and comfortable use.
Smart Images
Figure 00000001_ABST
Abstract
Description
[0001] Field of technology to which the invention relates
[0002] The invention relates to the production of upholstered furniture for sitting or lying and can be used, for example, in the manufacture of transformable upholstered furniture items, in particular sofa beds and chair beds consisting of three sections.
[0003] Technology Level
[0004] A sofa bed is known from the prior art, comprising a frame consisting of a back and side walls, a base, a soft element consisting of three pillows sequentially installed in the "bed" position, one of which - the outer one, is made retractable on a wheel support, a transformation means and a fixation means, in which the retractable wheel support is made in the form of a trolley, the transformation means includes a pair of posts connected by crossbars, hingedly connected at the upper ends with the longitudinal side of the outer pillow located in the area of the back wall, and at the lower ends - with the retractable trolley, the middle pillow is hingedly connected with one side to the retractable trolley with the possibility of moving the opposite side relative to the outer pillow located in the area of the back wall.The fastening means comprises a pair of beveled projections secured to the reverse side of the outer cushion, and a pair of beveled stop recesses located on the base, with which the projections of the cushion interact to hold the latter in the "sofa" position. (Description of the invention of the Russian Federation No. 2016533, publication date 30.07.1994, IPC A47C 17 / 04).
[0005] Also known from the prior art is a transformable three-section furniture for sitting or lying, selected as a prototype, including three sections, of which the first and second sections, when the furniture is folded, perform the function of a backrest, and the third section with at least one leg in the front part performs the function of a seat, a frame made of two sidewalls connected by means of a jumper, on which the first section is rotatably fixed, pivotally connected to the second section, which, in turn, is pivotally connected to the third section, wherein the three sections are installed with the possibility of fixing certain positions, the connection of the second section with the third section is carried out by means of at least one rotary support locking mechanism, the transformable three-section furniture is provided with a locking device consisting of a pair of stops with a beveled recess installed on the frame, as well as a pair of beveled protrusions installed on the third section,interacting with the frame stops to hold the furniture in the "sofa" position (drawings and description of the invention of the Russian Federation No. 2661827, IPC A47C 17 / 13).
[0006] A drawback of the analog and prototype is the limited horizontal movement of the movable section, which functions as a seat in the sofa position, in only one direction. The lack of movement limitation for the movable section, which functions as a seat, in other directions creates discomfort for the user and contributes to loosening of the furniture mechanism during prolonged use, especially under heavy loads.
[0007] Disclosure of the essence of the invention
[0008] The technical problem of the invention is the creation of a device for transformable three-section furniture for sitting or lying, devoid of the above-mentioned disadvantages.
[0009] The technical problem is solved due to the fact that the claimed transformable three-section furniture for sitting or lying includes a frame and three sections, of which the first and second sections, when the furniture is folded, perform the function of a backrest, and the third section performs the function of a seat, wherein the first section is pivotally fixed to the frame, pivotally connected to the second section, which, in turn, is pivotally connected to the third section, as well as at least two locking devices, wherein each locking device consists of one first element mounted on the frame, and two counter elements, where the first element is made with a protrusion, and the first counter element is made in the form of a seat lock with a recess and is mounted on the third section, wherein the second counter element is made in the form of a frame lock with a recess and is mounted on the second section,the recesses of the seat retainer and the frame retainer are formed by two limiting surfaces.
[0010] The technical result of the invention, in comparison with the prototype, is
[0011] to improve the fixation of furniture in the folded and unfolded position by reducing the movement of furniture sections relative to the frame in a fixed position.
[0012] Brief description of drawings
[0013] The essence of the invention is illustrated by graphic materials, where Fig. 1 shows a side view of a transformable three-section furniture for sitting or lying in the folded "sofa" position; Fig. 2 shows an enlarged view of the connection unit of the first and second sections in the folded "sofa" position; Fig. 3 shows an enlarged view of a seat lock with a stopper in the folded position of the "sofa" furniture; Fig. 4 shows a sectional view of the side of the seat lock; Fig. 5 shows a side view of a transformable three-section furniture for sitting or lying in the unfolded "bed" position; Fig. 6 shows an enlarged view of the frame lock with a stopper in the unfolded position of the "bed" furniture; Fig. 7 shows the frame lock and the stopper in a front view and in an isometric projection in the unfolded position of the "bed" furniture.
[0014] The following positions are shown in the drawings: 1 - the first section; 2 - the second section; 3 - the third section; 4 - frame; 5 - hinge; 6 - rotary support mechanism; 7 - seat lock; 8 - frame lock; 9 - stopper; 10 - fastening element of the seat lock to the third section of the furniture; 11 - inclined surface of the seat lock; 12 - recess of the seat lock; 13 - support heel of the stopper; 14 - seat lock wall; 15 - the first limiting surface of the recess of the seat lock; 16 - the second limiting surface of the recess of the seat lock; 17 - the first hole for the fastening element of the seat lock; 18 - the second hole for the fastening element of the seat lock; 19 - fastening element of the support leg; 20 - hole for the fastening element of the support leg; 21 - frame retainer fastening element; 22 - hole for frame retainer fastening element; 23 - frame retainer recess; 24 - first limiting surface of frame retainer;25 - the second limiting surface of the frame retainer.;
[0015] Implementation of the invention
[0016] The transformable three-section furniture for sitting or lying can be made, for example, in the form of a sofa bed, and contains a first section 1, a second section 2, a third section 3 and a frame 4. The first section 1 is fixed with
[0017] is capable of rotation on the frame 4 and is connected to the second section 2 through hinges 5. The second section 2 is connected to the third section 3 by means of at least two rotary support mechanisms 6. The third section 3 is designed with the possibility of extension, for example, on support legs equipped with wheels, and performs the function of a seat in the folded position of the “sofa” furniture.
[0018] The first 1 and second 2 sections function as a backrest when the furniture is folded, while the third 3 section functions as a seat. The frame 4 can be made from two side panels connected by a crossbar.
[0019] The transformable three-section furniture for sitting or lying also contains at least two locking devices, wherein each locking device consists of one first element with a protrusion mounted on the frame 4 and two counter elements with a recess, wherein the first counter element is made in the form of a seat lock 7 and is mounted on the third section 3, and the second counter element is made in the form of a frame lock 8 and is mounted on the second section 2. The recesses of the seat lock 7 and the frame lock 8 are formed by two limiting surfaces.
[0020] The first element with a projection may be, for example, a stopper 9, where the projection is made, for example, in the form of a support heel 13. In a specific example of implementation, the stopper 9 can be installed on the frame 4 in such a way that the projection of the stopper 9, which is, for example, a support heel 13, is located above the surface of the stopper 9, by which it is fixed on the frame 4. The stopper 9 can be installed, for example, on one of the sidewalls of the frame 4, as shown in Fig. 1, 3, 5, 6, 7.
[0021] The first response element, made in the form of a seat lock 7 and installed on the third section 3, is designed to fix the furniture in the folded position.
[0022] In a specific embodiment, the seat fastener 7 can be mounted on the third section 3 using fasteners 10, for which holes can be made in the seat fastener 7 (see Fig. 3, 4). For example, these can be holes 17 and 18. The seat fastener 7 can be additionally connected to the furniture support leg, as shown in Fig. 3, using a fastener 19 entering the hole 20, which, in this case, can be made in the seat fastener 7. The above-described method of installing the seat fastener 7 on the third section 3 is not the only possible one, and can be implemented
[0023] by any other technologically available means.
[0024] The seat retainer 7 can be made with walls 14 and contain an inclined surface 11, the height of which increases along the third section in the direction of folding the furniture, wherein the inclined surface 11, after reaching its maximum height, passes into a recess 12. The inclined surface 11 of the seat retainer 7 serves as a runner for the stopper 9 entering it when folding the furniture and is intended for the smooth entry of the support heel 13 of the stopper 9 into the recess 12 of the seat retainer 7. In the recess 12 of the seat retainer 7, the first 15 and second 16 limiting surfaces are made, which, together with the walls 14 of the seat retainer 7, prevent horizontal movements of the support heel 13 of the stopper 9.
[0025] In the folded position of the "sofa" furniture, the protrusion of the first element of the locking device, which is, for example, the support heel 13 of the stopper 9, will be located in the recess 12 of at least one second counterpart element of the locking device - the seat lock 7, between the first 15 and second 16 limiting surfaces, which prevent the horizontal movements of the support heel 13 of the stopper 9 along the direction of folding and unfolding of the furniture. The walls 14 of the seat lock 7 can also perform the function of limiting the horizontal movement of the stopper 9 in a direction perpendicular to the direction of folding and unfolding of the furniture. Thus, the furniture is fixed in the folded "sofa" position.
[0026] Limiting the horizontal movement of the furniture section, in this case section 3, relative to the frame when the furniture is secured in the folded "sofa" position along the direction of folding and unfolding is necessary to prevent unfolding and provide additional rigidity and stability. Additional limitation of the horizontal movement of stopper 9 in a direction perpendicular to the direction of folding and unfolding, using walls 14, also prevents the furniture structure from loosening.
[0027] The second counter element, made in the form of a frame retainer 8 and installed on the second section 2, is designed to fix the furniture in the unfolded position.
[0028] In a specific example of implementation, the frame retainer 8 can be installed on the second section 2 using the fastening element 21, under which in the retainer
[0029] A hole 22 can be made in the frame 8 (see Fig. 7). The described method of installing the frame retainer 8 on the second section 2 is not the only possible one and can be implemented in any other technologically available way. In the recess 23 of the frame retainer 8, first 24 and second 25 limiting surfaces are formed, which prevent horizontal movements of the support heel 13 of the stopper 9.
[0030] In the unfolded position of the furniture "bed", the protrusion of the first element of the fixation device, which is, for example, the support heel 13 of the stopper 9, will be located in the recess 23 of at least one second counterpart element of the fixation device - the frame lock 8 between the first 24 and second 25 limiting surfaces, which prevent horizontal movements of the support heel 13 of the stopper 9 in a direction perpendicular to the direction of folding and unfolding of the furniture. Thus, the furniture is fixed in the unfolded position "bed".
[0031] Limiting the horizontal movements of a furniture section, in this case section 2, relative to the frame when fixing the furniture in the unfolded “bed” position is necessary to give the structure additional rigidity and stability, as well as to prevent loosening.
[0032] The transformable three-section furniture for sitting or lying functions as follows. To convert the furniture from the "sofa" position to the "bed" position, lift the front of the third section 3, which causes the sections to slide until they are fully extended, forming a sleeping area. When the furniture is unfolded, the stoppers 9 engage their supporting heels 13 in the recesses 23 of the frame fasteners 8 (see Fig. 6).
[0033] The first 24 and second 25 limiting surfaces of the frame lock 8 reliably hold the stopper 9 from horizontal movements and ensure a stable position and rigidity of the furniture structure in the “bed” position.
[0034] To convert the furniture from the "bed" position to the "sofa" position, proceed as follows: pull the third section 3 upward by the front part, tilting the third section 3 until it clicks, at which point the third section 3 is fixed in this position, then, pressing down on the third section 3, slide sections 1, 2, 3 in the reverse order to the "sofa" position. In this case, the stopper 9, installed on the frame 4, smoothly moves along the inclined surface 11 of the seat lock 7 and hits the support heel 13 in the recess 12 of the lock 6
[0035] seats 7.
[0036] The first 15 and second 16 limiting surfaces of the seat retainer 7, as well as the walls 14 of the seat retainer 7, reliably hold the stopper 9 from horizontal movements and ensure a stable position and rigidity of the furniture structure in the “sofa” position.
[0037] The declared transformable three-section furniture is reliable and easy to use, can be manufactured in industrial production using existing modern technologies and find wide application in the furniture industry.
Claims
A transformable three-section furniture for sitting or lying, including a frame and three sections, of which the first and second sections, when the furniture is folded, perform the function of a backrest, and the third section performs the function of a seat, wherein the first section is rotatably fixed to the frame, pivotally connected to the second section, which, in turn, is pivotally connected to the third section, as well as at least two locking devices, wherein each locking device consists of one first element mounted on the frame, and two counter elements, characterized in that the first element is made with a protrusion, the first counter element is made in the form of a seat lock with a recess and is mounted on the third section, wherein the second counter element is made in the form of a frame lock with a recess and is mounted on the second section, the recesses of the seat lock and the frame lock are formed by two limiting surfaces.