Mechanism for transforming furniture from a sitting position to a lying down position

Abstract

A mechanism for transforming furniture from a sitting position to a lying down position has right and left jacks with identical design, which are a mirror reflection of each other, connected by a synchronisation mechanism. Each jack has a fastening plate which attaches the jack to the furniture body, angle bars, upper and lower for connecting with the mattresses, a spring and a front pull rod and rear pull rod with centre arms. Each jack has a backrest driving sub-assembly created from a backrest rotation pull rod and support to be connected with the backrest of the furniture, whereas the backrest rotation pull rod is connected in an articulated manner on one end with the bottom end of the rear pull rod, and on the second end is connected in an articulated manner with the support connected in an articulated manner to the fastening plate.

Claims

1. An apparatus for transforming an article of furniture from a sitting position to a lying down position, the article of furniture having a backrest and a seat, the apparatus comprising: a pair of jacks having an identical configuration, one jack of said pair of jacks being a mirror reflection of another jack of said pair of jacks; a synchronization mechanism connecting the one jack to the other jack of said pair of jacks, wherein each of said pair of jacks comprises: a fastening plate affixed to each of said pair of jacks, said fastening plate adapted to attach the jack to the article of furniture; an upper angle bar; a lower angle bar, said upper angle bar and said lower angle bar adapted to connect to the seat; a front pull rod having a center arm; a rear pull rod having a center arm, said front pull rod and said rear pull rod having one end articulated to said upper angle bar, said front pull rod and said rear pull rod having an opposite end articulated to said fastening plate, the center arm of said front pull rod and the center arm of said rear pull rod being articulated to said lower angle bar; and a backrest driving assembly having only a backrest rotation link and a bracket adapted to connect to the backrest of the article of furniture, said backrest rotation link articulated on one end to a bottom end of said rear pull rod and an opposite end hinged on to the bracket, the bracket being hinged to said fastening plate, wherein said backrest driving assembly raises or lowers the backrest relative to a position of the seat.

2. The apparatus of claim 1, wherein each jack of said pair of jacks comprises; a stop pin set in said upper angle bar and directed toward said front pull rod and said rear pull rod; and a stop pin set in said fastening plate and directed towards the bracket.

3. The apparatus of claim 2, wherein said stop pin set in said upper angle bar is positioned between an articulation of the front pull rod with said upper angle bar and the articulation of said rear pull rod with said upper angle bar.

4. The apparatus of claim 1, wherein said stop pin set in said fastening plate is positioned adjacent an articulation of the bracket with said fastening plate.

5. The apparatus of claim 1, wherein each jack of said pair of jacks further comprising: a bearing surface located on an upper end of said front pull rod on a side of said rear pull rod.

6. The apparatus of claim 1, wherein said rear pull rod has an upper end inclined toward said front pull rod.

7. The apparatus of claim 1, wherein each jack of said pair of jacks further comprising: a first kinematic node formed at an articulation of said rear pull rod with said upper angle bar; a second kinematic node formed at an articulation of said front pull rod with said upper angle bar, said first kinematic node positioned above said second kinematic node.

8. The apparatus of claim 1, wherein said upper angle bar has a shelf and said lower angle bar has a shelf, wherein the shelf of said upper angle bar and the shelf of said lower angle bar are at a common level when each jack of said pair of jacks is in an open position.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) The subject of the invention is shown in example implementations on a figure, where FIG. 1 presents the mechanism in closed position in an isometric view in a version for furniture with short legs.

(2) FIG. 2 illustrates the jack of the mechanism from FIG. 1 in a closed position in an enlarged isometric view.

(3) FIG. 3 illustrates the mechanism from FIG. 1 in an open position in an isometric view.

(4) FIG. 4 illustrates the jack of the mechanism from FIG. 1 in an open position in an enlarged isometric view.

(5) FIG. 5 illustrates the jack of the mechanism in a closed position in a side view in a version for furniture with short legs.

(6) FIG. 6 illustrates the jack of the mechanism from FIG. 5 in a rear view.

(7) FIG. 7 illustrates the jack of the mechanism from FIG. 5 in a top view.

(8) FIG. 8 illustrates the jack of the mechanism from FIG. 5 in an isometric view.

(9) FIG. 9 illustrates the jack of the mechanism in an intermediate position in a side view in a version for furniture with short legs.

(10) FIG. 9a illustrates the upper angle bar with the set stop pin in the A-A cross-section marked on FIG. 9.

(11) FIG. 9b illustrates the fastening plate with the set stop pin in the B-B cross-section marked on FIG. 9.

(12) FIG. 10 illustrates the jack of the mechanism from FIG. 9 in a rear view.

(13) FIG. 11 illustrates the jack of the mechanism from FIG. 9 in a top view.

(14) FIG. 12 illustrates the jack of the mechanism from FIG. 9 in an isometric view.

(15) FIG. 13 illustrates the jack of the mechanism in an open position in a side view in a version for furniture with short legs.

(16) FIG. 14 illustrates the jack of the mechanism from FIG. 13 in a rear view.

(17) FIG. 15 illustrates the jack of the mechanism from FIG. 13 in a top view.

(18) FIG. 16 illustrates the jack of the mechanism from FIG. 13 in an isometric view.

(19) FIG. 17 illustrates the mechanism in a version for furniture with short legs placed in the furniture in a closed position in a side view.

(20) FIG. 18 illustrates the mechanism in a version for furniture with short legs placed in the furniture in an intermediate position in a side view.

(21) FIG. 19 illustrates the mechanism in a version for furniture with short legs placed in the furniture in an open position in a side view.

(22) FIG. 20 illustrates the mechanism in closed position in an isometric view in a version for furniture with long legs.

(23) FIG. 21 illustrates the jack of the mechanism from FIG. 20 in a closed position in an enlarged isometric view.

(24) FIG. 22 illustrates mechanism from FIG. 20 in an open position in an isometric view.

(25) FIG. 23 illustrates the jack of the mechanism from FIG. 22 in an open position in an enlarged isometric view.

(26) FIG. 24 illustrates the jack of the mechanism in a closed position in a side view in a version for furniture with long legs.

(27) FIG. 25 illustrates the jack of the mechanism from FIG. 24 in a rear view.

(28) FIG. 26 illustrates the jack of the mechanism from FIG. 24 in a top view.

(29) FIG. 27 illustrates the jack of the mechanism from FIG. 24 in an isometric view.

(30) FIG. 28 illustrates the jack of the mechanism in an intermediate position in a side view in a version for furniture with long legs.

(31) FIG. 28a illustrates the upper angle bar with the set stop pin in the C-C cross-section marked on FIG. 28.

(32) FIG. 28b illustrates the fastening plate with the set stop pin in the D-D cross-section marked on FIG. 28.

(33) FIG. 29 illustrates the jack of the mechanism from FIG. 28 in a rear view.

(34) FIG. 30 illustrates the jack of the mechanism from FIG. 28 in a top view.

(35) FIG. 31 illustrates the jack of the mechanism from FIG. 28 in an isometric view.

(36) FIG. 32 illustrates the jack of the mechanism in an open position in a side view in a version for furniture with long legs.

(37) FIG. 33 illustrates the jack of the mechanism from FIG. 32 in a rear view.

(38) FIG. 34 illustrates the jack of the mechanism from FIG. 32 in a top view.

(39) FIG. 35 illustrates the jack of the mechanism from FIG. 32 in an isometric view.

(40) FIG. 36 illustrates the mechanism in a version for furniture with long legs placed in the furniture in a closed position in a side view.

(41) FIG. 37 illustrates the mechanism in a version for furniture with long legs placed in the furniture in an intermediate position in a side view.

(42) FIG. 38 illustrates the mechanism in a version for furniture with long legs placed in the furniture in an open position in a side view.

DETAILED DESCRIPTION OF THE INVENTION

(43) Mechanism for transforming furniture from a sitting position to a lying down position according to the invention has two jacks 1, right and left, with an identical design, which are a mirror reflection of each other. Jacks 1 are connected with each other by a synchronisation mechanism 2.

(44) Each of the jacks 1 of the mechanism consists of a fastening plate 3, a front pull rod 7 with its lower end connected in an articulated manner with the fastening plate 3 and its upper end connected in an articulated manner with the upper angle bar 8 and the rear pull rod 9 with its lower end connected in an articulated manner with the fastening plate 3 and its upper end connected in an articulated manner with the upper angle bar 8.

(45) The fastening plate 3 consists of a horizontal part 4 with its rear end transitioning into a vertical part 5. The fastening plate 3 contains assembly openings 6 used to attach the fastening plate 3 to the furniture body K.

(46) The front pull rod 7 has the shape of a flat bar 11. The flat bar 11 in its centre part has a centre arm 12 directed towards the rear pull par 9, and in its bottom part the flat bar 11 has a bottom arm 13 directed towards the fastening plate 3. The upper end 14 of the front pull rod 7 from the side of the rear pull rod 9 has a bearing surface 15.

(47) The rear pull rod 9 has the shape of a flat bar 16 with rounded ends. The flat bar 16 in its middle part has a centre arm 17. The upper end 31 of the rear pull rod 9 is inclined towards the front pull rod 7. This shape of the rear pull rod 9 ensures the creation of a free space W between the pull rods 9, 7 during the operation of the mechanism.

(48) The front pull rod 7 with the end of its centre arm 12 is connected in an articulated manner with the bottom angle bar 10 in its front part, and the rear pull rod 9 with the end of its centre arm 17 is connected in an articulated manner with the bottom angle bar 10 in its centre part.

(49) The angle bars 8, 10 of each jack 1 are placed on the jack 1 in such a manner that the shelves 18 are in a bottom horizontal position. On shelves 18 there are openings 19 intended to connect the angle bars 8, 10 with mattresses M.

(50) Each jack 1 has a backrest O driving sub-assembly created from the backrest O rotation pull rod 21 and support 22 intended for connection with the furniture's backrest O. The pull rod 21 has the form of a flat bar and is connected in an articulated manner on one end 23 with the lower end of the rear pull rod 9, and on the other end 24 is connected in an articulated manner with the support 22 connected in an articulated manner to the upper end of the vertical part 5 of the fastening plate 3. The support 22 rotates in relation to the fastening plate 3. The support 22 contains assembly holes 25 for connecting to the backrest O.

(51) In the front part of the fastening plate 3 a recess 26 is located, placed between the articulated connection of the rear pull rod 9 with the fastening plate 3 and the articulated connection of the front pull rod 7 with the fastening plate 3.

(52) Each jack 1 contains a stop pin 20 placed on the upper angle bar 8 and directed towards the front pull rod 7 and the rear pull rod 9 and the stop pin 27 set in the fastening plate 3 and directed towards the support 22.

(53) The stop pin 20 set in the upper angle bar 8 is placed between the articulated connection of the front pull rod 7 with the upper angle bar 8 and the articulated connection of the rear pull rod 9 with the upper angle bar 8.

(54) The stop pin 27 set in the fastening plate 3 is located near the articulated connection of the support 22 with the fastening plate 3.

(55) The mechanism is equipped with springs 28, which are placed on bolts 29 set in the fastening plates 3 and bolts 30 set in the bottom arms 13 of the front pull rods 7.

(56) In each of the jacks 1 the kinematic node X created at the articulated connection of the rear pull rod 9 with the upper angle bar 8 is located above the kinematic node X1 created at the articulated connection of the front pull rod 7 with the upper angle bar 8.

(57) A mechanism according to the invention is made in two versions.

(58) In the first version, intended for furniture with short legs in each of the jacks 1 in the open position, the shelf 18 of the upper angle bar 8 and the shelf 18 of the lower angle bar 10 are placed on the same level.

(59) In the second version, intended for furniture with long legs in each of the jacks 1 in the open position, the shelf 18 of the upper angle bar 8 is placed below the shelf 18 of the lower angle bar 10.

(60) In order to unfold the furniture from the sitting position to the lying down position, the front part of the furniture is pulled out from the body K. When pulling out as a result of the action of the mechanism the front mattress M slides out and is raised, and then the rear mattress M, in which the surfaces for lying down of both mattresses M are placed in a single plane. Simultaneously during the opening as a result of the action of pull rods 21 on the supports 22 the backrest O attached in a tilting manner is lowered. The springs 28 support the raising of mattresses M when opening the furniture. In the final phase the backrest O lowered to a horizontal position along with the mattresses M creates a single large surface for lying down.

(61) In order to fold the furniture from a lying down position to a sitting position the mattresses M are pulled in using the mechanism, until they retract into the furniture. At the same time during the pulling in of mattresses M through the action of pull rods 21 on the supports 22 the backrest O attached in a tilting manner is raised.

(62) Raising and lowering of the backrest O is the result of the action of pull rods 21 on supports 22 attached to the backrest O.

(63) Closed position of the jack 1 is established by resting the stop pin 20 set in the upper angle bar 8 on the side 32 of the rear pull rod 9 and resting the bearing surface 15 of the front pull rod 7 on the side 32 of the rear pull rod 9.

(64) Open position of the jack 1 is established by resting the side 33 of the support 22 on the stop pin 27 set in the fastening plate 3 and resting the stop pin 20 on the upper end 14 of the front pull rod 7 at the place where the side 34 of the front pull rod 7 transitions into the bearing surface 15.