RU208842U1 - Furniture transformation mechanism - Google Patents

Abstract

The utility model relates to the mechanisms of transformation of upholstered furniture and can be used in the construction of sofas or armchairs of the Eurobook type, in which the transformation leads to an increase in the size of the bed due to the movement of the back and seat. The furniture transformation mechanism comprises a support bar for attaching to a fixed furniture base, a lifting bar for attaching to a furniture seat, first and second curved levers pivotally connecting the support and lifting bars, a folding leg for seat support, the upper part of which is pivotally connected to the lifting bar, and an intermediate rod pivotally connecting the first lever to the upper part of the leg to enable the leg to be folded and unfolded when lifting and lowering the lifting bar. The upper part of the leg is made tubular and is pivotally connected to the lifting bar by means of a bracket covering the upper part of the leg, as well as a rod element passing through the upper part of the leg and the bracket. The technical result is an increase in the rigidity of the mechanism design and, as a result, the possibility of excluding the synchronizer installed between the legs from the furniture design. 8 w.p. f-ly, 10 ill.

Description

[01] Field of technology

[02] The utility model relates to mechanisms for transforming upholstered furniture and can be used in the construction of sofas or chairs of the Eurobook type, in which the transformation leads to an increase in the size of the bed due to the movement of the back and seat.

[03] State of the art

[04] The closest analogue of the utility model is the disclosed transformation mechanism (RF patent for utility model RU157677, 10.12.2015). The known mechanism contains a support bar for attachment to a fixed base of furniture; lifting bar for attaching furniture to the seat; two curved levers pivotally connecting the support and lifting bars; a folding leg for the seat, the upper part of which is pivotally connected to the lifting bar; and also an intermediate rod pivotally connecting the first lever to the upper part of the leg in such a way that it is possible to fold and unfold the leg when raising and lowering the lifting bar. In the closest analogue, the leg is made in the form of a flat element connected to the upper bar by means of a hinge pin. Such a cantilever connection has low rigidity, which requires the installation of an additional synchronizer in the area of the support legs.

[05] Disclosure of the utility model

[06] The main technical problem to be solved by the claimed utility model is the need to use a synchronizer that connects two transformation mechanisms in the area of the support legs. An additional problem is the impossibility of making the lower (supporting) part of the leg from a solid decorative material.

[07] The technical result of the utility model is to increase the rigidity of the mechanism design and, as a result, the possibility of excluding the synchronizer installed between the legs from the furniture design.

[08] This problem is solved, and the technical result is achieved in the utility model due to the fact that the furniture transformation mechanism contains a support bar for attachment to a fixed base of the furniture; lifting bar for attaching furniture to the seat; first and second curved arms pivotally connecting the support and lifting bars; a folding leg for the seat, the upper part of which is pivotally connected to the lifting bar; and an intermediate rod pivotally connecting the first lever to the upper part of the leg to allow the leg to be folded and unfolded when the lifting bar is raised and lowered. In this case, the upper part of the leg is made tubular and is pivotally connected to the lifting bar by means of a bracket covering the upper part of the leg, as well as a rod element passing through the upper part of the leg and the bracket.

[09] In addition, according to particular embodiments of the utility model:

[010] - the leg may have a tubular or solid lower part;

[011] - the bracket can be U-shaped;

[012] - the first lever can be connected to the lifting bar in its middle part, and the second lever and the upper end of the support leg - with the ends of the lifting bar;

[013] - the first and second levers can be connected to the ends of the support bar;

[014] - the first lever may have a protrusion to which the intermediate rod is connected;

[015] - The upper part of the leg may have a protrusion to which the intermediate rod is connected.

[016] - the first and second levers may consist of two rectilinear parts located at an angle to each other.

[017] The use in the claimed utility model of two curved levers connecting the support (lower) and lifting (upper) bar allows you to maintain the rigidity of the swivel of the base and seat of the furniture. At the same time, in the claimed utility model, an improved fastening of the leg to the lifting bar is proposed. So the cantilever swivel mount used in the closest analogue is replaced by a swivel mount at two points of support using a bracket covering the leg. The flat leg has been replaced by a voluminous leg with a tubular top. The specified design improvement increases the strength of the supporting part of the mechanism in the unfolded (horizontal) position. This, in turn, allows you to completely abandon the installation of the synchronizer between the supports (legs) of the two mechanisms.

[018] Also, the horizontal rigidity of the leg allows the use of a universal tubular base (upper part) in combination with a lower part made of decorative materials (wood, plastic, etc.).

[019] Thus, all the above features of the utility model are aimed at achieving a single technical result, which consists in increasing the rigidity of the design of the transformation mechanism.

[020] Brief Description of the Drawings

[021] The utility model is illustrated by figures, where

[022] Figure 1 shows a side view of the mechanism in the unfolded state,

[023] Figure 2 shows a side view of the mechanism in the folded state,

[024] figure 3 shows a three-dimensional view of the mechanism in the unfolded state;

[025] Figure 4 is an exploded view of the mechanism;

[026] Figure 5 shows a first leg design;

[027] Figure 6 shows a second leg design;

[028] Figures 7-10 show the steps for unfolding a piece of furniture with the mechanism in question.

[029] Structural elements and other objects are indicated in the figures by the following positions:

1 - support bar,

2 - furniture base,

3 - lifting bar,

4 - furniture seat,

5 - the first lever,

6 - second lever,

7 - leg,

8 - the upper part of the leg,

9 - the lower part of the leg,

10 - U-shaped bracket;

11 - rod element;

12 - back;

13 - intermediate thrust;

14 - protrusion of the leg

15 - protrusion of the first lever,

16 - hinge,

17 - emphasis.

[030] Implementation of the utility model

[031] The claimed mechanism for transforming furniture is a structurally integral device, including a support bar (1) for attaching to a fixed base (2) of furniture and a lifting bar (3) for attaching to a seat (4) of furniture. The support bar (1) can be made in the form of a flat element, and the lifting bar (3) in the form of an angled profile. The lifting (3) and support (1) bars are pivotally connected by means of two curved levers: the first (5) and the second (6), located on the sides of the lower part of the mechanism. The second lever (6) is connected by its upper end to the first end (on the right in the figures) of the lifting bar (3), and by its lower end to the first end (on the right in the figures) of the support bar (1). The first lever (5) is connected by its upper end to the middle part of the lifting bar (3), and by its lower end to the second end (left in the figures) of the support bar (1). Both levers (5) and (6) consist of two rectilinear parts placed at an angle. In this case, the bends of the levers are directed to the inner part of the quadrangle formed by the hinges (16) connecting the levers (5,6) with the support (1) and lifting (3) bars.

[032] The mechanism also includes a folding leg (7), which serves as a support for the seat (4) in the unfolded state of the furniture (Fig. 10). The leg (7) has a tubular upper part (8), which is pivotally connected to the lifting bar (3) at two points by means of a bracket (10) attached to the lifting bar (3), covering the upper part (8) of the leg (7), as well as rod hinge element (11) passing through the holes of the upper part (8) of the leg and bracket (10). The bracket can be made in the form of a U-shaped bracket, the free ends of which cover the upper part (8) of the leg (7).

[033] According to one of the embodiments of the design (Fig. 5), the leg (7) can be made entirely tubular, i.e. have tubular upper (8) and lower (9) parts. According to another implementation variant (Fig. 6), the leg has a universal tubular upper part (8) (base) and a lower part (9) (support) connected to it with a detachable fastener, which can be made of solid material (wood, plastic and etc.). The tubular parts of the leg (7) may have a square, rectangular or any other profile.

[034] To implement synchronous folding and unfolding of the leg (7) when moving the seat (4), the claimed mechanism provides an intermediate rod (13) pivotally connecting the first lever (5) with the upper part (8) of the support leg (7). To implement this connection, the leg (7) and the first lever (5) in the upper parts can have protrusions (14) and (15), respectively, in which hinges (16) are placed for fixing the intermediate rod (13). The presence of protrusions (14) and (15) provides a short stop of the support leg (7) at the initial stage of unfolding the mechanism, in which the leg (7) “hangs” for a while while the rest of the mechanism continues to move and then starts moving together with the mechanism. The intermediate rod (13) can be structurally made in the form of a straight bar.

[035] The support leg may additionally comprise a stopper (not shown conventionally in the figures), which serves to limit its movement and fix it in the unfolded position of the furniture. Stops (17) can be made on the levers (5) and (6), fixing the mechanism in the unfolded and folded positions to increase rigidity and stability. The mechanism may thus contain springs to facilitate transformation. Planks, levers and thrust of the mechanism can be made of a metal (steel) profile.

[036] To ensure transformation, two symmetrical mechanisms are installed on both sides of the furniture element, which can be connected by means of a synchronizer located in the area of the levers. At the same time, a synchronizer is not required at the location of the leg (7).

[037] The mechanism works as follows. In the folded position (see Fig. 7) and the back (12) of the furniture is in a vertical position, the seat (4) is placed horizontally on the base (2) close to the back (10), the support leg (7) is folded and is located essentially , horizontally. To unfold the furniture, the user lifts the seat (4) together with the lifting bar (3) attached to it (Fig. 8). The levers (5, 6) rotate relative to the support bar (1), due to which the lifting bar (3) with the seat (4) moves up and to the side - in the direction from the backrest (10) (Fig. 8, 9). At the same time, the intermediate rod (13) associated with the first lever (5) begins to rotate the support leg (7) ensuring its unfolding without touching the base (2) (Fig. 8, 9). After passing the top point, the seat (4) starts to lower (Fig. 9) until it touches the horizontal plane of the base (2). In this case, the leg (7) assumes a vertical position (Fig. 9). After that, the user lowers the backrest (12), which assumes a horizontal position and is flush with the seat (4) (Fig. 10). Folding is carried out in reverse order.

Claims (9)

1. Furniture transformation mechanism containing a support bar (1) for attachment to a fixed base (2) of furniture; lifting bar (3) for attaching furniture to the seat (4); the first (5) and second (6) curved levers pivotally connecting the support (1) and lifting (3) bars; folding leg (7) for seat support (4), the upper part (8) of which is pivotally connected to the lifting bar (3); and an intermediate rod (13) pivotally connecting the first lever (5) with the upper part (8) of the leg (7) with the possibility of folding and unfolding the leg (7) when lifting and lowering the lifting bar (3), characterized in that the upper part (8) leg (7) is made tubular and pivotally connected to the lifting bar (3) by means of a bracket (10) covering the upper part (8) of the leg (7), as well as a rod element (11) passing through the upper part (8) legs (7) and bracket (10). 2. Mechanism according to claim 1, characterized in that the leg (7) has a tubular lower part (9). 3. Mechanism according to claim 1, characterized in that the leg (7) has a solid lower part (9). 4. The mechanism according to claim 1, characterized in that the bracket (10) is U-shaped. 5. The mechanism according to claim 1, in which the first lever (5) is connected to the lifting bar (3) in its middle part, and the second lever (6) and the upper end (8) of the leg (7) are connected to the ends of the lifting bar (3 ). 6. The mechanism according to claim 5, characterized in that the first (5) and second (6) levers are connected to the ends of the support bar (1). 7. The mechanism according to claim 1, characterized in that the first lever (5) has a protrusion (15) to which the intermediate rod (13) is connected. 8. The mechanism according to claim 7, characterized in that the upper part (8) of the leg (7) has a protrusion (14) to which the intermediate rod (13) is connected. 9. The mechanism according to claim 1, characterized in that the first (5) and second (6) levers have two rectilinear parts located at an angle to each other.

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