RU2372824C1 - Folding framework of convertible armchair - Google Patents

Abstract

FIELD: personal articles.

SUBSTANCE: invention relates to folding framework of convertible armchair. Framework consists of bearing framework with, mounted on it on one side, lifting framework, which bears bed frame consisting of several hingedly connected frame elements and on which on each side supporting leg is hingedly installed. On supporting leg installed are seat support and back support with folding device. Three frame elements from each side by means of connecting links are connected into three hinged four-linked elements and all together into kinematic chain with possibility of consecutive folding of frame elements at angle approximately 90° to each other form position for lying into position for sitting. In position for sitting supporting leg is installed approximately horizontally, and back support - approximately vertically. Seat support by means of bearing bars is connected with head frame element and by guiding lever with supporting leg in such way, that it, being controlled by eccentric, is placed in position for lying close under head frame element with shifting backward, and in position for sitting - is aligned by head frame element.

EFFECT: obtaining maximal compactness of framework construction, and at placing seat cushion into most comfortable for user position.

8 cl, 3 dwg

Description

The invention relates to a folding frame of a chair-bed, consisting of a supporting frame with a lifting frame installed on its side, supporting a bed frame, consisting of several articulated frame elements and on which a support leg is pivotally mounted on each side on which the seat and backrest supports are mounted with a folding mechanism, moreover, three frame elements are connected on both sides by means of connecting links, respectively, into three articulated four-link chains and all together in a kinematic chain with the ability to sequentially fold the frame elements at an angle of about 90 ° to each other from the lying position to the sitting position, and in the sitting position, the support leg (10) is installed approximately horizontally and the backrest support (13) is approximately vertical.

Such a folding bed frame is known from the description of patent DE 10322838 B3. In it, another articulated four-link is connected to the head frame element, by means of which the movement of the backrest and seat supports is controlled. In this design, the seat cushion in the sitting position is above the bed frame at some distance from it, and in the lying position it is in an uncomfortable position.

The objective of the invention is to improve the known folding frame of the chair-bed so that the seat support when folding is shifted so that the frame structure becomes more compact and the seat cushion is installed in a convenient position.

This problem is solved in accordance with the characteristics of claim 1 of the claims.

A preferred embodiment of the invention is provided in the dependent claims.

By means of new features, an even more compact folding of the folding frame is achieved. At the same time, the seat support is connected to the head frame element by means of support rods in a parallelogram mechanism and, thanks to the control by means of an eccentric mounted on the support leg, is displaced in such a way that in the sitting position it is aligned with the frame element from above and in the sitting position it is under the frame an element near it with an offset back. The necessary until now separation of the seat cushion fixed to it is no longer mandatory.

Thanks to the guide levers pivotally mounted on the eccentric of the support leg, its movement, respectively, is transmitted to the seat support. In this case, the eccentric is controlled by a lever mechanism that further transfers movements aimed at folding the frame elements when moving from the lying position to the sitting position. These linkage mechanisms consist of a transmission lever pivotally mounted on the middle frame element and an angular lever pivotally connected to it, pivotally mounted on the intermediate frame element from the head side.

The eccentric is rigidly connected to the support leg and mounted on the mounting plate on the head frame element with an eccentric rotation.

A guide lever is pivotally mounted on the eccentric, which exerts its other end in the middle of the support rod and transmits the eccentric movement through it to the parallelogram mechanism. In this case, the end of the guide lever on the parallelogram mechanism is made U-shaped so that the guide lever in the seating position can act through the frame element, and the seat support is aligned with the head frame element.

The backrest is rigidly connected to the lower end of the support leg. Thus, it provides movement of the support leg and in the seating position is set in accordance with the desired slope of the back.

A preferred embodiment of the invention is shown in FIGS. 1-3.

Figure 1 shows a side view of the folding frame of the chair-bed in the lying position;

figure 2 shows in detail the folding mechanism;

figure 3 shows the folding mechanism in the seating position.

Figure 1 shows the folding frame of the chair-bed in the lying position. The frame of the mattress consists of five frame elements 1a-1e, located in this case horizontally one after the other with a hinge, the hinge 28 connecting the frame elements 1a, 1b; hinge 29 - frame elements 1b, 1c; hinge 33 - frame elements 1c, 1d; hinge 32 - frame elements 1c, 1e. The three frame elements 1a, 1b, 1d are much shorter than the other two frame elements 1c, 1e, which are folded approximately parallel to each other when folded into the seating position.

On the left, in the figure, under the frame elements 1a, 1b and about 1/3 of the frame element 1c, a lifting mechanism A is made on the supporting frame 2.

On the right in the figure is the support and folding mechanism B with the support leg 10.

The indicated frame hinges 28, 29, 33, 32 are included in the corresponding four-hinged mechanisms, of which the four-hinged mechanism I from the side of the lifting frame contains links 1b, 1c, 5b, 4 with hinges 29, 34, 21, 28, the four-hinged mechanism attached to it II - links 1c, 1d, 6, 5a with hinges 33, 35, 36, 34, and the next four-joint mechanism III in the order of attachment - links 1e, 1d, 8, 7 with hinges 35, 27, 30, 31.

Another hinged triangle IV is connected to this kinematic chain, including the supporting leg 10. It consists of links 1e, 10, 9, 8 with hinges 22, 25, 27.

The above links are usually sections or protrusion 1d * indicated by reference data of the frame side cross members or, if indicated in capital letters, part of the connecting rods in the form of two shoulders levers, such as pivoting levers 5 with shoulders 5a, 5b, and other sections 5c, 5d.

The connecting links of the articulated four-link are completely placed under the upper edge of the frame 1 so that when unfolding or folding they do not touch the mattress laid out on it (not shown).

The lifting mechanism A comprises two lifting pivot arms 3, 5, of which the first pivot arm 3 is connected to the support frame 2 by a hinge 38, and to the frame element 1b by a hinge 37, while portions 5b, 5c of the second pivot arm 5 are located between the supporting frame 2 and the frame element 1c in the interval from the hinge 39 to the hinge 34.

The lifting process is facilitated by springs 15, 16 and 17.

For folding, the frame element 1e is moved by the handle from the side of the support leg 10 in the direction of the arrow 18 upwards and towards the side of the lifting frame A. For folding, the handle is moved from the side of the lifting frame A in the direction 19, as a result of which the second pivoting lever 5 is rotated in the direction 20. Spring 16 contributes to the folding process. Handles also serve as side stops for the unfolded mattress.

In the position for transporting in the folded state, the first frame element 1a is rotated in the hinge 28 to a position parallel to the frame element 1c, which significantly reduces the height of the structure.

The hinge 22 of the support leg 10 and the hinge 25 of the angle lever 8 are mounted on the frame element 1e by means of a mounting plate 9, due to which the eccentric movement is transmitted by the hinge 24 to the guide lever 12. The seat support 14 is pivotally mounted on the frame element 1e in a parallelogram mechanism in the form of two supporting rods 11. The movement of the parallelogram mechanism is controlled by an eccentric by means of a guide lever 12.

The backrest support 13, made in the form of a lattice, is rigidly connected to the support leg 10, which sets it together with the cushion not shown in the folded position for sitting in the corresponding position for the back, and in other cases, to the initial position shown under the seat cushion moved down, placed on seat support 14 (not shown).

Figure 2 shows the control of the process of rotation or, accordingly, lifting by means of an eccentric 26 before or after folding or unfolding in the area of the hinge 32 between the frame elements 1d, 1e. The eccentric 26 is rigidly connected to the support leg 10 and is fixed by means of a mounting plate 9 on the frame element 1e with the possibility of rotation in the hinge 22.

Due to the upward movement in the direction 18, the frame elements 1e and 1d are folded relative to each other, and by means of a pivot lever 7 connected by a hinge 30 to an angular lever 8, and by a hinge 25, this movement is transmitted to the eccentric 26. The seat support 14 is fixed to the frame element 1e with the ability to move through the supporting rods 11 in a parallelogram mechanism. The parallelogram mechanism is controlled by a guide lever 12, one of the ends of which is made U-shaped and connected by a hinge 23 to the middle of one of the supporting rods 11, and the other end by means of a hinge 24 connected to an eccentric 26.

The backrest support 13 is also fixed below on the support leg 10 and moves with it to a seating position.

The seat cushion 40 and the back cushion 41 are mounted on respective supports and facing each other.

Figure 3 shows the folding mechanism in the seating position. The head frame element 1e is thrown, and the support leg 10 is therefore in a horizontal position. The support 13 of the back in this case is facing up. A pillow 41 of a back is fixed on it.

The seat support 14 by means of a guide lever 12, acting with its U-shaped end on the frame element 1e, is installed in it horizontally and parallel to it. Thus, the seat cushion 40 forms a horizontal plane of the seat extending to the back cushion 41.

The frame elements 1c and 1e are horizontally stacked on top of each other and connected to each other by the frame element 1d via hinges 32 and 33.

The rotary lever 7 transfers the folding movement of the frame elements by means of hinges 30, 31 and 27 to the angular lever 8. The latter translates the support leg 10, mounted on the mounting plate 9 and the hinge 22 on the frame element 1e, in a horizontal position. This movement through the eccentric 26 and the guide lever 12 through the hinges 23 and 24 is transmitted to the parallelogram mechanism of the support 14 of the seat. In this case, the U-shaped end of the guide lever 12 acts on the frame element 1e so that the seat support 14 is mounted horizontally in the frame element 1e.

List of items

one; 1a-1e - frame; five frame elements

2, 2 * supporting frame

3 first lifting pivot arm 2-1b

Over the ledge - 3

4 third lifting pivot arm 5-1a / 1b

5 second lifting pivot arm 2-1s

5a-5d sections of the pivot arm

6 connecting link AB; 5a-1d *

7 fourth pivot arm 8-1c

8 angle lever 7-26

9 hinge mounting plate - 1e

10 supporting leg - 1e (9)

11 support bar

12 guide lever - 11

13 backrest

14 seat support

15 first tension spring 5d-2

16 second tension spring 5d 5d-3a

17 third tension spring 1b-3a

18 direction of movement when folding

19 direction of travel 1a, 1e when unfolding

21 hinge 4-5

22 hinge 10-9

23 hinge 12-11

24 hinge 11-26

25 hinge 8-26

26 clown

27 hinge 8-1d

28 hinge 1a-1b-4

29 hinge 1b-1c

30 hinge 8-7

31 hinge 7-1c

32 hinge 1d-1e

33 hinge 1c-1d

34 hinge 5-1c

35 hinge 6-1d *

36 hinge 5a-6

37 hinge 3-1b

38 hinge 3-2

39 hinge 5-2

40 seat cushion

41 back cushion

A lifting gear

In folding mechanism

I-V articulated quadrangle

Claims (8)

1. Folding frame of a chair-bed, consisting of a supporting frame (2) with a lifting frame (A) mounted on its side, supporting frame (1a-1e) of the bed, consisting of several articulated frame elements and on which it is pivotally mounted on each side a support leg (10) on which a seat support (14) and a back support (13) are installed with a folding mechanism (B), each of the three frame elements (1c-1e) being connected on both sides by means of connecting links (12, 8, 7, 6, 5a, 5b, 4) into three articulated four-link chains and all together in the kinematic chain with the possibility of sequentially folding these frame elements (1c-1e) at an angle of about 90 ° to each other from the lying position to the sitting position, and in the seating position, the support leg (10) is installed approximately horizontally, and the support (13) the backrest approximately vertically, characterized in that the seat support (14) is connected by means of support rods (11) to the head frame element (1e) and by means of guide levers (12) with the support leg (10) so that it, being controlled by an eccentric (26), located on the floor zhenii for lying closely below the head frame element (1e) with a shift back and in a position aligned with the head seat frame member (1e). 2. The folding frame according to claim 1, characterized in that the eccentric (26) is rigidly connected to the support leg (10). 3. The folding frame according to claim 2, characterized in that the support leg with an eccentric (26) is mounted on the head frame element (1e) by means of a mounting plate (9) which can be rotated eccentrically. 4. The folding frame according to claim 3, characterized in that the support leg (10) is made with the possibility of its direct control by moving the folding of the frame elements (1d, 1e) from the lying position to the sitting position by means of swinging levers (7, 8) and an eccentric (26). 5. The folding frame according to claim 1, characterized in that the seat support (14) is rotatably mounted on the head frame element (1e) on both sides by means of respectively two support rods (11) with the creation of a parallelogram mechanism. 6. The folding frame according to claim 5, characterized in that the parallelogram mechanism is arranged to move it accordingly by means of a guide lever (12) between the support rod (11) and the eccentric (26). 7. The folding frame according to claim 5, characterized in that the guide lever (12) is pivotally mounted with a U-shaped end in the middle of the support rod (11), and the other on the eccentric (26). 8. The folding frame according to claim 1, characterized in that the backrest support (13) is rigidly connected to the support leg (10).

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