Pivot fitting

Abstract

Disclosed is a swivel fitting (9) for a piece of furniture with two parallel side panels (10) terminating in support elements (15) for upholstery, and a swivel drive (11) for swiveling the support elements (15), which includes at least one sliding element (13) guided relative to the support elements (15) and a swivel gear (14) driven by the sliding element (13) between mounting plates (12) of the side panels (10) and the support elements (15). To better utilize the installation space available for the drive, a drive element (23) guided transversely between the side panels (10) is proposed, as well as a gear element (24) that converts a transverse movement of the drive element (23) into a sliding movement of the sliding element (13) perpendicular to it.

Description

[0001] The invention relates to a swivel fitting for a piece of furniture with two parallel side parts which terminate in support elements for a cushion, and with a swivel drive for swiveling the support elements, which has at least one sliding element which is guided slidably to the support elements and a swivel gear driven by the sliding element between mounting plates of the side parts and the support elements.

[0002] DE 203 08 094 U1 proposes such a swivel fitting for a recliner chair, in which a manually operated lever mechanism in the side panels moves the sliding elements parallel to the backrest towards the support elements for the upholstered headrest. DE 102 40 230 A1, EP 2 893 843 B1, EP 3 167 763 A1 and WO 2020 / 234001 A1 disclose such swivel fittings with a motorized drive and a worm shaft guided parallel to the side panels. Further swivel fittings are known, for example, from DE 202 00 499 U1 and DE 20 2007 016 435 U1. Other relevant prior art documents are US 2010 / 072791A1 and US 10595642B2.

[0003] In a seating or reclining furniture, a wide but shallow installation space is available between the side parts of the swivel fitting, in which the drive and gear elements must not impair seating and reclining comfort.

[0004] In the background of the invention, cam mechanisms are generally known, which consist of two interlocking elements – the cam and the cam block sliding in a groove in the cam – which are each guided on a circular or linear path.

[0005] Furthermore, in the background of the invention, hinged bands with links that are guided synchronously in one plane in a chain-like manner for pivoting headrests and armrests in upholstered furniture are generally known. Task

[0006] The invention is based on the objective of making better use of the installation space available for the drive. Solution

[0007] Based on the known swivel fitting, the invention proposes a drive element guided transversely between the side parts and a gear element that converts a transverse movement of the drive element into a thrust movement of the thrust element perpendicular to it.

[0008] The inventive arrangement of the drive with a thrust movement transversely between the side parts and the gearbox exclusively perpendicular to this (i.e. parallel, for example, to the angle frame) makes ideal use of this available installation space.

[0009] Preferably, in a pivoting fitting according to the invention, the gear element is a cam guided perpendicular to the transverse movement, into which the drive element engages with at least one cam block. The cam mechanism translates the transverse movement of the drive element into the linear movement of the linear element in a very simple mechanical way – with only a single additional moving component. As an alternative to the cam mechanism, other gear elements with a flat installation space, for example lever and scissor mechanisms, are suitable.

[0010] Preferably, in a pivot fitting according to the invention, the cam has at least two parallel grooves into which the drive element engages with at least one cam block in each groove. The at least two cam blocks reduce the risk of the cam becoming jammed. Other gear elements can also be implemented multiple times with the same result.

[0011] Preferably, in such a swivel fitting according to the invention, the drive element is a slide of a linear motor. With increasing size of the swiveled cushion and increasing swivel angle, manual operation via a lever mechanism becomes impractical due to the forces required and the necessary lever travel. Linear motors are widely available on the market, are inexpensive, and are virtually maintenance-free.

[0012] Preferably, in a swivel fitting according to the invention, hinge bands are arranged between a mounting plate of the side part and the support element as a swivel mechanism. The hinge bands allow a very smooth, stepless swiveling of the cushion.

[0013] Preferably, a swivel fitting according to the invention has a crossbeam for the padding between the support elements. The crossbeam stabilizes the synchronous swiveling movement of the two support elements.

[0014] Preferably, a piece of furniture according to the invention comprises a seat cushion, a back cushion, a padded headrest, and a swivel fitting for the headrest according to the invention. Such a piece of furniture is also characterized by the advantages of the swivel fitting according to the invention described above. Examples of implementation

[0015] The invention is explained below with reference to exemplary embodiments. These show Fig. 1 a piece of furniture according to the invention, Fig. 2a / b the swivel fitting of the furniture according to the invention in the closed position, Fig. 2c a detail of the swivel fitting, Fig. 3a / b the swivel fitting in the open position and Fig. 4 / 5 two further swivel fittings according to the invention.

[0016] The in Figur 1 The furniture 1 shown according to the invention belongs to a seating group (not shown) and has an upholstered armrest 2, a seat cushion 3, and a back cushion 4. As a so-called "relaxing chair," the furniture 1 has an extendable, also upholstered, footrest 5. The seat cushion 3 and the back cushion 4 can be adjusted from the illustrated sitting position to a reclining position (not shown) by means of a wall-clearance fitting 6 (only indicated for simplicity).

[0017] A similarly only indicated wooden supporting structure 7 shows a feature in the Figure 2a , 2b and 2cThe angle frame 8 shown in detail carries a first swivel fitting 9 according to the invention for the back cushion 4.

[0018] The swivel fitting 9 has two parallel, essentially mirror-image side parts 10 and a swivel drive 11 between them. Each side part 10 has a mounting plate 12 screwed firmly to the angle frame 8, a sliding element 13, a swivel drive 14, and a support element 15 for a cushion 16 integrated into the back cushion 4 as a headrest. The support elements 15 are connected via a cross member 17.

[0019] The mounting plate 12 has two guide pins 18 arranged one above the other, which engage in a guide groove 19 of the thrust element 13. A known hinged linkage with five pivot points is integrally formed on the mounting plate 12 as a swivel mechanism 14. The links 20 of the swivel mechanism 14 are toothed at their ends and interlock. The swivel mechanism 14 is pivotally connected to the thrust element 13 via a connecting rod 21 such that the vertical thrust or pull movement of the thrust element 13 directly, continuously, and with minimal backlash pivots the support elements 15 and thus the padding 16 attached to these elements and to the crossbeam 17.

[0020] The rotary actuator 11 comprises a support plate 22 connected to the mounting plates 12, a drive element 23, and a gear element 24. The drive element 23 is the carriage of a linear motor 25 mounted horizontally on the support plate 22. The gear element 24 is a plate-shaped cam with two parallel, inclined grooves 26, screwed to the thrust elements 13.

[0021] A plate 27, arranged parallel to the support plate and the cam, is rigidly connected to the drive element 23 and is guided by two bolts 28 in a horizontally extending guide groove 29 at the bottom of the support plate. Two similarly bolt-shaped cam blocks 30 at the top of the plate 27 engage in one of the grooves 26 of the gear element 24 in such a way that the horizontal transverse movement of the drive element 23 directly, continuously and with minimal backlash sets the gear element 24 and the thrust elements 13 into their vertical thrust movement.

[0022] The Figuren 2a bis 2c The figures show the rotary gearbox 14 in the closed position with the drive element 23 fully extended from the linear motor 25, the rotary gearbox 14 curved, and the support elements 15 pointing vertically downwards. Figuren 3a and 3b The swivel gear 14 is shown in the open position with the drive element 23 retracted to its maximum extent, the swivel gear 14 being straight and the support elements 15 pointing vertically upwards.

[0023] Figure 4Figure 1 shows a second pivot fitting 31 according to the invention, which essentially corresponds to the first pivot fitting 9. For simplicity, only one of the side parts 32 and the horizontally extending drive element are not shown. The gear element 33 of the second pivot fitting 31 is a carrier guided in two vertical guide grooves 34 on the support plate 35. The gear element 33 is connected to the drive element via a connecting rod 37 guided on the support plate via a horizontal guide groove 36 and to the push element 39 via a further connecting rod 38.

[0024] Figure 5 Figure 3 shows a third pivot fitting 40 according to the invention, which essentially corresponds to the second pivot fitting 31. The gear element 41 is connected here to the drive element (not shown here) via two parallel connecting rods 42.

[0025] A further swivel fitting according to the invention, not shown, also corresponds essentially to the second swivel fitting 31. In contrast, the gear element is guided in a vertically arranged telescopic rail instead of the guide grooves 34.

[0026] The characters are 1 Furniture 2 Armrest 3 Seat cushion 4 Back cushion 5 Footrest 6 Wall clearance fitting 7 Support structure 8 Angle frame 9 Swivel fitting 10 Side panel 11 Swivel drive 12 Mounting plate 13 Slide element 14 Swivel gear 15 Support element 16 Cushion 17 Crossbeam 18 Guide pin (side) 19 Guide groove 20 Link 21 Connecting rod 22 Support plate 23 Drive element / slide 24 Gear element / scroll 25 Linear motor 26 Groove 27 Plate 28 Bolt 29 Guide groove 30 Slide block 31 Swivel fitting 32 Side panel 33 Gear element 34 Guide groove 35 Support plate 36 Guide groove 37 Connecting rod 38 Connecting rod 39 Push element 40 Swivel fitting 41 Gear element 42 Connecting rod

Claims

1. A pivot fitting (9, 31, 40) for a piece of furniture (1), having two side parts (10, 32) that run parallel to one another, have respective mounting plates (12) and end in supporting elements (15) for a cushion (16), and having a pivot drive (11) for pivoting the supporting elements (15), which has at least one pushing element (13, 39), which is guided displaceably relative to the supporting elements (15), and a pivot gear (14), which is driven by the pushing element (13, 39), is arranged between the mounting plates (12) of the side parts (10, 32) and the supporting elements (15), characterised by a drive element (23), which is guided transversely between the side parts (10, 32), and a gearing element (24, 33, 41), which converts a transverse movement of the drive element (23) into a pushing movement, perpendicular thereto, of the pushing element (13, 39).

2. The pivot fitting (9) according to the preceding claim, characterised in that the gearing element (24, 33, 41) is a slotted guide, which is guided perpendicularly to the transverse movement and into which the drive element (23) engages with at least one sliding block (30).

3. The pivot fitting (9) according to the preceding claim, characterised in that the slotted guide has at least two parallel grooves (26), into which the drive element (23) engages with at least one sliding block (30) in each case.

4. The pivot fitting (9, 31, 40) according to one of the preceding claims, characterised in that the drive element (23) is a slide of a linear motor (25).

5. The pivot fitting (9, 31, 40) according to one of the preceding claims, characterised in that hinge bands are arranged as pivot gears (14) between a mounting plate (12) of the side part (10, 32) and the supporting element (15).

6. The pivot fitting (9, 31, 40) according to one of the preceding claims, characterised by a transverse support (17) for the cushion (16) between the supporting elements (15).

7. A piece of furniture (1) having a seat cushion (3), a back cushion (4), a cushioned headrest, and a pivot fitting (9) for the headrest according to one of the preceding claims.

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