EP2712521B1 - Hinge fitting, preferably for upholstered furniture with an adjustable back, and upholstered furniture - Google Patents

Description

The present invention relates to a hinge fitting according to the preamble of claim 1, preferably for furniture, upholstered furniture or the like with an adjustable back having at least two connected via a fixed pivot joint leg, which are pivotally configured to each other, wherein a first joint leg means of at least two parts trained longitudinal guide in the direction of leg longitudinal axis is designed adjustable in length. Furthermore, the invention also relates to a upholstered furniture according to the preamble of claim 11.

Seating / reclining furniture with a bendable functional part (eg a headrest or a backrest) are well known. Such a upholstered furniture is in the DE 20 2005 015 275 U1 discloses where a hinge fitting is used, which consists of two joint legs, wherein the lower joint leg is firmly connected to the body of the seat / recliner, while the upper hinge leg is attached to the movable functional part. In this case, the movable functional part is adjustable in length connected via a coupling part with the hinge fitting. For this purpose, the coupling part slides along the upper joint leg.

From the DE 299 22 329 U1 is also a upholstered furniture with an adjustable headrest known. In this case, a hinge fitting with a locking function is used, wherein the lower hinge leg is connected to the body of the upholstered furniture and the upper joint leg height adjustable with the headrest. In addition, a tension belt is used, which serves to retract the headrest depending on the adjustment angle to the body of the upholstered furniture. The longitudinal adjustment of a padding stretcher is made possible via a C-profile of a headboard fixed guide rail.

An adjustable length hinge fitting for a upholstered furniture part is in the DE 20 2007 017 997 U1 disclosed. The lower hinge fitting is also attached to the body of the upholstered furniture, while the upper hinge fitting is longitudinally adjustable locked to the movable upholstered furniture part. For this purpose, a telescopic guide is provided, which is realized by a longitudinal bore, in which at least one guide pin from the length-adjustable fastening part, which is configured in the form of a slide, can slide along.

Another hinge fitting is from the DE 202005 011058 U1 known.

Despite complex design of the illustrated hinge fittings, it can come during upsetting and stretching the upholstered furniture in the joint area to a wrinkle warping of the pad, which limits the comfort of the upholstered furniture during use. Such a fold warp is due to a clamping of the C-shaped linear guide, which is called forth by an angular displacement of the movable cushion member to the fixed cushion member.

Based on the aforementioned prior art, it is therefore an object of the present invention to provide a hinge fitting and a upholstered furniture, which overcomes the disadvantages of the prior art. In particular, it is a further object of the present invention to provide a hinge fitting and upholstered furniture which has a solid and simple construction, and which reliably prevents wrinkling in the upsetting of the upholstered furniture.

The solution of the problem is achieved by a hinge fitting according to claim 1, in particular from the characterizing part, specified measures. In addition, the object is also achieved by a upholstered furniture according to claim 11, in particular from the characterizing part. The upholstered furniture according to the invention can have at least one hinge fitting according to the invention. Advantageous embodiments of the hinge fitting according to the invention and the upholstered furniture according to the invention are listed in the subclaims. Thus, in the context of the disclosure, technical features of the swivel fitting according to the invention also apply to the upholstered furniture according to the invention and vice versa, so that in this respect also mutual reference can be made. Under the term upholstered furniture is in the context of this invention, any piece of furniture such. As beds, armchairs, chairs, etc. understood.

The hinge fitting according to claim 1 has the following special significance. In the hinge fitting according to the invention, a first part of the longitudinal guide of the first hinge leg is rod-shaped and enclosed by the second part of the longitudinal guide, wherein the first part is designed to rotate about the longitudinal axis of the leg to the second part. This has the advantage that during the linear guide at the same time a rotational movement is allowed, which allow angular adjustments or angular errors between the first part of the longitudinal guide of the first hinge leg and the second part of the longitudinal guide of the first hinge leg. Such angular adjustment or angular errors are compensated by the proposed arrangement, so that no wrinkle distortion occurs during the compression of a upholstered furniture. For the proposed hinge fitting standard components can be used, which reduce the manufacturing cost of the swivel fitting.

Furthermore, it may be provided in the hinge fitting according to the invention that the second part of the longitudinal guide surrounds the first part of the longitudinal guide circumferentially completely. Characterized an additional degree of freedom for the rotation is obtained in the movement of the first and the second part of the longitudinal guide to each other, wherein the first part to the second part are rotatable up to approximately 360 °. The upholstered furniture remains flexible in the joint area movable in the longitudinal direction.

Advantageously, the second part of the longitudinal guide can be designed like a tube by the first part of the longitudinal guide is at least partially rotatably mounted and longitudinally displaceable. The use of a tubular design of the second part of the longitudinal guide reduces the cost of the hinge fitting, since no complex components for the preparation of the hinge fitting are required. Due to the displaceability of the first part in the second part in the direction of the longitudinal axis of the leg, the different length of the hinge fitting is easily realized.

It is conceivable within the scope of the invention that the second part of the longitudinal guide has a substantially circular cross-section. Due to this configuration, the first part can be easily made of a, a corresponding cross section having rod part, in particular made of metal or reinforced plastic, and thus inexpensive.

It can also be provided in the hinge fitting according to the invention that between the two parts of the longitudinal guide at least one sliding element, in particular made of plastic, is arranged. The sliding element contributes to the fact that in particular the mechanical friction between the first and the second part of the longitudinal guide is reduced. The sliding element can be designed by a shrink tube over the first part of the longitudinal guide. It is also conceivable that a plastic tube over the first part of the longitudinal guide serves as a sliding element. In this case, the outer diameter of the plastic tube is preferably designed as a sliding fit to the inner diameter of the second part of the longitudinal guide. Further, the slider may be provided with a stop, which is designed for example as a collar (in the direction of the pivot point). This collar-like stop noise can be significantly reduced when moving together the longitudinal guides.

It seems particularly advantageous that at least one stop is provided between the two parts of the longitudinal guide in order to limit the rotational movement and / or the longitudinal displacement of the longitudinal guide. This ensures that a Jamming of the first and the second part of the longitudinal guide to each other is prevented. In addition, thus too far retraction of the longitudinal guide can be reliably prevented.

It may also be provided in the hinge fitting according to the invention that the cross section of the tube-like configured second part of the longitudinal guide is greater than a, in the second part of the longitudinal guide transverse extension of the first part of the longitudinal guide. This ensures that the first part of the longitudinal guide can move freely within the second part of the longitudinal guide with respect to the two degrees of freedom available. In this case, the game between the two parts of the longitudinal guide may be minimally designed to avoid slagging or even jamming.

Furthermore, in the hinge fitting according to the invention, the first and the second hinge legs can be connected to each other by a frictional connection containing the pivot point. By means of such a non-positive connection, the adjusting force of the joint is arbitrarily adjustable.

It is conceivable within the scope of the invention that the non-positive connection is designed as a screw-nut combination, wherein in particular the mother is designed as a self-locking nut. Such a screw-nut combination allows a reliable, durable connection of the first and second hinge leg. It is particularly advantageous if a self-locking nut is used. Also, after adjusting the biasing force in the fulcrum of the swivel fitting a locking varnish fix the screw-nut combination cohesively. Instead of the mentioned screw-nut combination can also be a rivet used, which already has the advantage that it is not self-releasable.

It is also conceivable in the hinge fitting according to the invention that the rod-shaped first part of the longitudinal guide and / or the second hinge leg has at least two partial joint legs, which are fastened one above the other in their longitudinal extent, wherein the ends held by means of the non-positive connection Part joint leg of the first part of the longitudinal guide and the second hinge leg are spread apart from each other and engage with each other. This embodiment realizes a particularly stable hinge fitting, which can absorb high forces in particular in the region of the pivot point by the increased friction surface.

The invention is not only directed to a hinge fitting according to claim 1, but also comprises a upholstered furniture according to claim 11.

This upholstered furniture has a fixed back part with a back, which is changeable in its position by means of a hinge fitting on. The hinge fitting is designed as a hinge fitting according to one of the features of this patent application. Such upholstered furniture is height-adjustable or angle-adjustable without fold warping. A distortion of the pad of the backrest in the change of position is reliably prevented because the hinge fitting used is movable within two degrees of freedom.

It may be provided in the upholstered furniture according to the invention that the second hinge leg is fixed to a fixed element of the backrest or a frame of the upholstered furniture and the first joint leg via the longitudinal guide on an upper, movable element of the backrest. This ensures that the backrest, despite its mobility in two degrees of freedom is firmly locked to the upholstered furniture.

It is also possible in the upholstered furniture according to the invention that the hinge fitting is formed approximately perpendicular to the vertical extent of the fixed back part in the leaning against the backrest backrest, wherein the non-positive, the pivot point comprehensive connection is positioned near an upper end of the back part. With this embodiment it is ensured that the buckling of the joint and thus the backrest is matched with the design of the back part.

Instead of the above-mentioned backrest on a piece of furniture also an armrest or a (foot) support can be designed to be foldable by the hinge fitting according to the invention.

Further measures and advantages of the invention will become apparent from the claims, the following description and the drawings. In the drawings, the invention is shown in several embodiments.

Fig. 1

schematische Darstellung einer Vorderansicht eines Polstermöbels mit abgeklappter Lehne,

Fig. 2

schematische Darstellung einer Seitenansicht eines Polstermöbels mit abgeklappter Lehne,

Fig. 3

schematische Darstellung einer Vorderansicht eines Polstermöbels mit ausgeklappter Lehne,

Fig. 4a

schematische Darstellung einer Seitenansicht des Polstermöbels mit ausgeklappter Lehne gemäß Fig. 3,

Fig. 4b

eine schematische Darstellung einer Draufsicht auf ein Polstermöbel mit ausgeklappter Lehne gemäß Fig. 3,

Fig. 5

eine erste schematische Darstellung eines ersten Ausführungsbeispieles des erfindungsgemäßen Drehgelenkbeschlages,

Fig. 6

eine erste Seitenansicht des erfindungsgemäßen Drehgelenkbeschlages gemäß Fig. 5,

Fig. 7

eine zweite Seitenansicht des erfindungsgemäßen Drehgelenkbeschlages gemäß Fig. 5,

Fig. 8

schematische Darstellung eines zweiten Ausführungsbeispiels des erfindungsgemäßen Drehgelenkbeschlages,

Fig. 9a

ein erster Querschnitt durch den erfindungsgemäßen Drehgelenkbeschlag

Fig. 9b

ein zweiter Querschnitt durch den erfindungsgemäßen Drehgelenkbeschlag und

Fig. 10

ein weiterer Querschnitt durch den erfindungsgemäßen Drehgelenkbeschlag.

Show it:

Fig. 1

schematic representation of a front view of a upholstered furniture with the backrest folded down,

Fig. 2

schematic representation of a side view of a upholstered furniture with the backrest folded down,

Fig. 3

schematic representation of a front view of a upholstered furniture with the backrest folded out,

Fig. 4a

schematic representation of a side view of the upholstered furniture with folded back according to Fig. 3 .

Fig. 4b

a schematic representation of a plan view of a upholstered furniture with folded back according to Fig. 3 .

Fig. 5

a first schematic representation of a first embodiment of the hinge fitting according to the invention,

Fig. 6

a first side view of the hinge fitting according to the invention according to Fig. 5 .

Fig. 7

a second side view of the hinge fitting according to the invention according to Fig. 5 .

Fig. 8

schematic representation of a second embodiment of the hinge fitting according to the invention,

Fig. 9a

a first cross section through the hinge fitting according to the invention

Fig. 9b

a second cross section through the hinge fitting according to the invention and

Fig. 10

another cross section through the hinge fitting according to the invention.

In the figures, the same technical features - regardless of the embodiments of the invention - provided with the same reference numerals, provided that the technical features also have the same technical function.

In the Fig. 1 is a front view of a upholstered furniture 1 is shown, which has a seat surface 2, on which a backrest 4 is placed. The back 4 is connected via a frame 17 directly or indirectly via a fixed back part 3 with the seat 2. The hinged backrest 4 contains on its, extending away from the seat 2 sides sides each have a hinge fitting 5, wherein the two hinge fittings 5 are at least attached to a support plate 12 which expands within the longitudinal extent of the backrest 4.

Fig. 2 shows a side view of the upholstered furniture 1 according to Fig. 1 , From this side view shows that the back 4 is leaned against a fixed back part 3 and / or fixed, which rests on the seat surface 2. The fixed back part 3 is made shorter in its height extent than the adjustable back 4, which is shown in the present representation in the folded state. The positioning of the backrest 4 is adjusted by the hinge fitting 5. The hinge fitting 5 consists of two joint legs 6, 7, wherein the first hinge leg 6 is formed as a longitudinal guide 9, which is connected via a fixed pivot point 8 with the second. The back 4 is at least on the two lower hinge legs 7 of the two (left and right side arranged) hinge fittings 5 with the rest of upholstered furniture 1, in particular the frame 17, the fixed back part 3 and / or the seat 2 firmly connected or screwed. The longitudinal guide 9 is constructed in two parts and comprises a rod-shaped first part 9.1, which engages in a second part 9.2, which is designed as a tube with a round diameter. The diameter of the rod-like first Part 9.1 is formed smaller than a cross section of the second tubular part 9.2, so that during the movement of the pivot fitting 5, the rod-like first part 9.1 within the second part 9.2 unhindered along a leg longitudinal axis 16 can move in the longitudinal direction. At the same time, however, a rotation of the second part 9.2 about the leg longitudinal axis 16 is possible.

Fig. 3 shows a front view of the upholstered furniture 1 with stretched back 4. In particular Fig. 4a shows that when forming the vertical backrest 4, the two parts 9.1 and 9.2 of the longitudinal guide 9 are at least partially pushed apart, whereby a height adjustment of the backrest 4 is realized. When changing the position from the bent state in the vertical state of the backrest 4, on the one hand, the longitudinal guide 9 moves apart, in particular the second part 9.2 moves away in the direction of the fixed pivot 8 from the first part 9.1, and on the other hand pivots the entire joint leg 6 with its longitudinal guide about the fixed pivot 8 of the joint leg 7, which is firmly locked to the back 4. In this case, takes the first part 9.1, which engages in the second part 9.2, the support plate 12 of the backrest 4 and guides them in a vertical position.

Fig. 4b shows a plan view of the upholstered furniture 1, in which the backrest 4 conforms to the back part 3. This illustration is intended to represent a shape of the back 4, in which a person has taken place on the upholstered furniture 1 and is based on the backrest 4. The backrest 4 is pressed approximately centrally in the direction of the back part 3. It comes to angular changes or angular errors, but have no negative impact on the proposed hinge fitting 5, as can be compensated for by the possible rotational movement of the second part 9.2 to the longitudinal axis of the leg such angular errors. Faults that can lead to wrinkles in the compression of the backrest 4 are also reliably prevented.

A first embodiment of the swivel fitting 5 is shown in FIG Fig. 5 educated. In this case, the tubular second part 9.2 (in a vertical position of the back 4) something out of the first part 9.1 or moved away, wherein the second part is 9.2 firmly connected to the support plate 12 of the backrest 4. The first part 9.1 is preferably constructed in two layers and has two partial joint legs 9.1.1 and 9.1.2. The second gift leg 7, however, is preferably constructed in three layers and has the Partial joint legs 7.1, 7.2 and 7.3. Both the partial joint legs 9.1.1, 9.1.2 and the partial joint legs 7.1, 7.2, 7.3 are connected to each other in the region of their ends facing each other via a frictional connection, wherein the non-positive connection has the pivot point 8. The non-positive connection is formed in the specific case of a screw 10 which is locked with a self-locking nut 11. In the area of the screw 10 and the nut 11, the ends of the partial joint legs 9.1.1, 9.1.2 and 7.1, 7.2, 7.3 overlap each other, whereby the friction surface of the rotary joint 8 is increased. For this purpose, both the ends of the partial joint legs 9.1.1, 9.1.2 of the first part 9.1 and the ends of the partial joint legs 7.1, 7.2, 7.3 of the second joint leg 7 are spread, so that the partial joint legs 7.1, 7.2, 7.3 of the second joint leg. 7 take the partial joint legs 9.1.1 and 9.1.2 of the first part 9.1 of the longitudinal guide. The partial joint legs 7.1, 7.2, 7.3 of the second joint leg 7 may optionally be extended at their free end by additional rods.

In Fig. 6 is a side view of this first embodiment of the hinge fitting 5 in a vertical position of the back 4 shown, while in Fig. 7 a bent position of the hinge fitting 5 of the backrest 4 is shown. As based on the Fig. 7 can be clearly seen, the back 4 is retracted by the longitudinal guide 9, ie, the second part 9.2 has a minimum distance from the fixed pivot point 8. In both cases from the FIGS. 5 and 6 is the vertical backrest 4 at least slightly extended by the longitudinal guide.

A second embodiment of the hinge fitting 13 is shown in FIG Fig. 8 which shows a kinematic reversal in the longitudinal guide 9, in particular in the first and second part 9.1 and 9.2, in comparison to the first embodiment. In this case, in contrast to the first embodiment, the second tubular part 9.2 rotatably mounted on the pivot point 8 on the second hinge leg 7, while the rod-shaped first part 9.1 of the longitudinal guide 9 is longitudinally displaceable and rotatably mounted along the leg longitudinal axis 16 within the second part 9.2 and simultaneously firmly attached to the support plate 12 of the backrest 4. Also in this embodiment, the second part 9.2 is connected via a non-positive connection in the region of the pivot point 8 with the second joint leg 7, wherein the setting of the non-positive Connection the adjusting force of the joint 8 is set. Furthermore, in Fig. 8 also a sliding element 14 in the longitudinal guide 9 shown with an upper collar-shaped stop 14.1 between the (lower) tubular second part 9.1 and the (upper) rod-shaped first part 9.2.

Fig. 9a shows a first cross section through the longitudinal guide 9, from which it can be seen that the second part 9.2 completely surrounds the first part 9.1. Between the first part 9.1 and the second part 9.2, a sliding element 14 is formed, which preferably consists of a plastic injection-molded part, and which reduces the friction between the two parts 9.1, 9.2 of the longitudinal guide 9. Ideally, in the Fig. 9a and 9b between the sliding member 14 and the first tubular second part 9.2 provided a sliding fit.

In Fig. 9b a further variant of the sliding element 14 in the longitudinal guide 9 is shown. The corresponding sliding element 14 is designed as a plastic tube 14 and pushed over the rod-shaped first part 9.1. In this case, the outer diameter of the plastic tube 14 is preferably designed as a sliding fit to the inner diameter of the second part 9.2 of the longitudinal guide 9. Furthermore, as indicated by dashed lines, the sliding element 14 may be provided with a stop 14.1, which is configured, for example, in the shape of a collar (in particular in the direction of the pivot point 8). By this collar-like stop 14.1 noise when moving together the longitudinal guides 9 can be significantly reduced.

As from the further example of the Fig. 10 As can be seen, the sliding element 14 can not completely fill the interior space between the parts 9.1, 9.2 of the longitudinal guide 9, since the second part 9.2 opposite each one has an inwardly projecting stop 15, which are directed towards the sliding member 14 to the rotational movement and / or to limit the longitudinal displacement of the longitudinal guide 9 at least partially.

LIST OF REFERENCE NUMBERS

1

upholstered furniture

2

seat

3

fixed back part

4

rest

5

Hinge mount

6

joint leg

7

joint leg

7.1

Partial joint leg

7.2

Partial joint leg

7.3

Partial joint leg

8th

pivot point

9

longitudinal guide

9.1

first part of the longitudinal guide

9.1.1

Partial joint leg

9.1.2

Partial joint leg

9.2

second part of the longitudinal guide

10

screw

11

mother

12

support plate

13

Hinge mount

14

Slide

14.1

Stop at 14, in particular collar-shaped

15

attack

16

Thigh longitudinal axis of 9.1

17

frame

Claims (13)

1. Hinge fitting, preferably for furniture, upholstered furniture or the like having an adjustable back rest, comprising at least two hinge arms (6, 7) connected via a fixed pivot point (8), which are configured to be pivotable with respect to one another, wherein a first hinge arm (6) is designed to be adjustable in length in the direction of the arm longitudinal axis by means of a longitudinal guide (9) which is configured to be at least two-part,
   characterized in that
   a first part (9.1) of the longitudinal guide (9) of the first hinge arm (6) is configured to be rod-shaped and is surrounded by a second part (9.2) of the longitudinal guide (9), wherein the first part (9.1) is configured to be rotatable about the arm longitudinal axis with respect to the second part (9.2).
2. The hinge fitting according to claim 1,
   characterized in that
   the second part (9.2) of the longitudinal guide (9) surrounds the first part (9.1) completely circumferentially.
3. The hinge fitting according to claim 1 or 2,
   characterized in that
   the second part (9.2) of the longitudinal guide (9) is configured to be tubular, whereby the first part (9.1) of the longitudinal guide (9) is mounted at least partially rotatably and longitudinally displaceably.
4. The hinge fitting according to any one of the preceding claims,
   characterized in that
   the second part (9.2) of the longitudinal guide (9) has a substantially circular cross-section.
5. The hinge fitting according to any one of the preceding claims,
   characterized in that
   at least one sliding element (14), in particular made of plastic, is disposed between the two parts (9.1, 9.2) of the longitudinal guide (9),
   wherein in particular a stop (14.1) is also provided on the sliding element (14).
6. The hinge fitting according to any one of the preceding claims,
   characterized in that
   at least one stop (15) is provided between the two parts (9.1, 9.2) of the longitudinal guide (9) in order to limit the rotational movement and/or the longitudinal displacement of the longitudinal guide (9).
7. The hinge fitting according to any one of the preceding claims,
   characterized in that
   the cross-section of the second part (9.2) of the longitudinal guide (9) which is configured to be tubular is greater than an extension of the first part (9.1) of the longitudinal guide (9) running transversely in the second part (9.2) of the longitudinal guide (9).
8. The hinge fitting according to any one of the preceding claims,
   characterized in that
   the first and the second hinge arms (6, 7) are interconnected by a non-positive connection (10, 11) containing the pivot point (8).
9. The hinge fitting according to claim 8,
   characterized in that
   the non-positive connection (10, 11) is configured as a screw-nut combination, wherein in particular the nut (11) is configured as a self-retaining nut.
10. The hinge fitting according to any one of the preceding claims,
    characterized in that
    the rod-shaped first part (9.1) of the longitudinal guide (9) and/or the second hinge arm (7) consist of at least two part hinge arms (9.1.1, 9.1.2; 7.1, 7.2, 7.3) which are fastened in a superposed manner in their longitudinal extension, wherein the ends of the part hinge arms (9.1.1, 9.1.2; 7.1, 7.2, 7.3) of the first part (9.1) of the longitudinal guide (9) held by means of the non-positive connection (10, 11) and of the second hinge arm (7) are configured to be splayed outwards from one another and intermesh.
11. Upholstered furniture comprising a fixed back part having a back rest which can be varied in its position by means of a hinge fitting,
    characterized in that
    the hinge fitting is configured as a hinge fitting (5) according to at least one of the preceding claims 1 to 10.
12. The upholstered furniture according to claim 11,
    characterized in that
    the second hinge arm (7) is fastened to a fixed element of the back rest (4) or a frame of the upholstered furniture and the first hinge arm (6) is fastened to the upper movable element (12) of the back rest (4) by means of the longitudinal guide (9).
13. The upholstered furniture according to claim 11 or 12,
    characterized in that
    the hinge fitting (5) is configured to be approximately perpendicular to the height extension of the fixed back part (3) in the back rest (4) resting on the back part (3), wherein the non-positive connection (10, 11) comprising the pivot point (8) is positioned close to an upper end of the back part (3).

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