EP2884871A1

EP2884871A1 - Fitting for an item of seating furniture

Info

Publication number: EP2884871A1
Application number: EP13736524.3A
Authority: EP
Inventors: Andreas Hortig; Boris Besler
Original assignee: Kintec Solution GmbH
Current assignee: Kintec Solution GmbH
Priority date: 2012-08-15
Filing date: 2013-07-01
Publication date: 2015-06-24
Anticipated expiration: 2033-07-01
Also published as: EP2884871B1; CN103054364A; ES2605831T3; WO2014026797A1; US20140049078A1; CN103054364B; PL2884871T3; US9271574B2; DE102012214541A1

Abstract

The invention relates to a fitting having a swivelable leg rest segment, the fitting having a separate spring that serves to reliably maintain the leg rest segment in a stowed-away position when it is not needed.

Description

Fitting for a piece of seating furniture

Field of application and state of the art

The invention relates to a fitting for a piece of seating furniture and a piece of seating furniture with such a fitting.

A generic fitting for a piece of seating furniture has the following components: It has a base for stationary or rotatable about a vertical axis arrangement on a substrate. He has a support member to which the seat of the seat piece of furniture is intended to be attached, this support member relative to said base between a relative to a furniture longitudinal axis front end relative position and a rear Endrelativlage is movable. He has for the purpose of this relative mobility of the support member further comprises a front and a rear rigid tab, wherein the front tab is pivotable about a stationary to the base and the front flap first axis relative to the base and a fixed to the support member and the front flap second axis is pivotable relative to the support member. The rear flap is pivotable relative to the base about a third axis fixed to the base and to the rear flap, and to a support part and to the rear flap stationary fourth axis relative to the support member pivotally. Furthermore, the fitting has a leg rest portion for attachment of a leg rest, which is veschwenkbar between a stowed position under the base and a functional position in front of the base and its relative position to the base with the relative position of the support member relative to the base is forcibly coupled such that the Beinauflageteil occupies the functional position , When the support member is disposed in its rear Endrelativlage, and assumes the stowed position when the support member is disposed in its front Endrelativlage.

Furthermore, a generic fitting also has a first spring between a first and a second pivot point on the support member and the base part, which causes a force acting on the support member in the direction of its front end position.

Generic seating furniture pieces are known at least from the internal state of the art. The base is that part which is preferably stationary and at most rotatable on a substrate, so a bottom surface is arranged. It is connected as intended with a furniture foot or has this on. The support member which carries the seat in the installed state of the fitting, is movable relative to the base, wherein this is done via said front and rear tab. In this case, a plurality of front and rear tabs are usually provided, which are pivotable about identical pivot axis. As far as spoken in connection with this document from the front and the rear flap, so also means the majority of such tabs.

By the support member, the base and the front and the rear flap a system of four segments is formed, which are chain-like closed by the four mutually parallel axes against each other movable. This mobility serves the purpose that supporting part of Rear seat to shift when a person sits down on the seat piece in question. With this displacement of the support member to the rear of a displacement of said legrest part is connected, which thereby pivots from a stowed position in the functional position. The said chain of four segments causes the support member can only move along a defined path relative to the base. Each position of the support member is assigned a specific by the length of the tabs pivoting angle of the support member.

The usually present in generic pieces of furniture first spring, which is preferably also provided in a seating furniture piece and its fitting according to the invention, pushes the support member in the direction of its front end relative position, which presses due to the forced coupling with the Beinauflageteil this in the direction of its stowed position. This spring serves the purpose of damping the displacement of the support member from its front Endrelativlage in its rear Endrelativlage when a particular heavy person is seated on the piece of furniture in question. This usually provided in generic furniture pieces spring is designed to be relatively soft in the rule.

Although this spring in principle acts to the fact that the support member is pressed in the direction of its front Endrelativlage and thereby the Beinauflageteil in the direction of its stowed position, this spring is not sufficient to reliably hold the Beinauflageteil in its stowed position. Especially when this is provided with a massive padding, the first spring can not ensure reliable reaching the stowed position.

In the said at least internally known prior art is provided on the outside of the fitting, ie on the outside of the left and right cheeks of the base part, provide further springs, the act between the base and Beinauflageteil and continuously pull the Beinauflageteil in the direction of its stowage position, wherein in the course of the transfer of the Beinauflageteils in its functional position a dead center position is exceeded, so that these springs are also suitable to secure the functional position of the Beinauflageteils.

The problem with these known springs, however, is that they would be very much stretched at large swivel angles of the legrest part, so that expansion forces would be required to ensure the desired operation, which would simultaneously bring a stiffness in the transfer of the legrest part in its functional position with it. Furthermore, the said springs, which are usually provided on the outside of the cheeks, are problematic because they, like the first spring, are oriented approximately horizontally and therefore have to be tuned specifically to the first spring. In a change of individual components of the fitting or the fitting furniture comprehensive piece, it would require significant adjustments. Thus, for example, a change in the upholstery and the mass of the padding can lead to the fact that the first spring or the known additional springs acting on the leg rest have to be redesigned.

Task and solution

The object of the invention is therefore to develop a generic furniture fitting to the effect that this is able to hold the leg rest segment safely in its stowage position.

According to the invention this is achieved in that a second spring is provided, which is spaced on the one hand at a third articulation point, which is spaced from the first articulation point and the second articulation point, on the support part and on the other hand at a fourth articulation point is hinged to the base part and acts on approaching the Beinauflagenteils to its stowage position between the support member and the base member so that the Beinauflageteil is subjected to force in the direction of its stowed position.

It is thus according to the invention, in addition to the first spring, which is to achieve the damping effect described above, provided to attach a specially provided for this purpose second spring on the fitting, which serves to secure the stowed position of the leg rest part. This spring is to be attached to deviate from the articulation points of the first spring articulation points and thus acts geometrically different. Unlike known designs, it does not directly engage the leg rest member, but acts between the base member and the support member and utilizes the positive coupling of its relative position with the position of the leg rest member. By such a special second spring, which can be arranged by subsequently explained measures to the effect that it unfolds relevant effect only in the stowed position of the leg rest part, the stowage position of the leg rest part can be reliably secured.

The second spring is preferably provided in a front region of the fitting, ie in the region of the front flap. At this front part and the leg rest portion is provided, which is preferably connected in such a way that it always pivoted in the common direction with the front flap.

It is particularly advantageous if the second spring is arranged such that it unfolds the desired effect when the Beinauflageteil the stowed position approaches, with greater spacing of the Beinauflageteils of its stowed position unfolds no adverse effect and particularly preferably energetically almost neutral behavior. It has been found that this can be achieved if the spacing of the articulation points of the second spring relative to the first and the second axis follow certain principles.

Thus, it is of particular advantage if the third point of articulation of the second spring, that is to say the articulation point on the support part, is spaced apart from the second axis, that is to say the pivot axis of the front tab on the support part. This spacing is preferably between 5 mm and 50 mm. Analogously, it is with respect to the fourth pivot point of the second spring, so the Anlenkpunkts at the base, and the first axis, ie the base-side axis of the front tab, provided that a spacing is provided here, which is preferably between 5 mm and 40 mm ,

In connection with these geometrical details, the following is for the understanding of relevance: The measures according to the invention can be easily explained on the basis of the description of the fitting as a two-dimensional fitting. Unless otherwise stated below, the respective details for the spacing of axes and articulation points relate to a projection of the fitting on a plane that is spanned by the furniture vertical direction and the furniture longitudinal direction. The axes mentioned extend in the transverse direction of furniture, ie orthogonal to this projection plane.

The proposed spacing of the first axis to the fourth articulation point and the second axis to the third articulation point ensures that the indirect action of the second spring on the leg support part can change over the pivoting distance between stowed position and functional position. However, due to the only slight spacing, it is achieved that during the transition from the stowed position of the leg rest part to the functional spring, the second spring Position is only slightly stretched, which is advantageous in terms of ease of arranging the second spring.

In order to effect the effectiveness of the spring in a particularly advantageous manner, when the Beinauflageteil is close to its stowed position, and to effect the neutralization of the second spring, when the Beabstan- tion of Beinauflageteils of its stowed position is comparatively large, the relative arrangement of the third and the fourth articulation point and the first and the second axis advantageously be designed as follows.

First, it is advantageous if a first connecting line on said projection plane, which extends between the first axis and the second axis, with a second connecting line extending between the third and the fourth pivot point, in the front end relative position of the support member and thus the Stowed position of the leg support part includes a larger angle than in the rear relative position of the support member and thus in the functional position of the Beinauflageteils. This larger angle causes the action of the second spring, which extends in the direction of the second connection degrees, to be particularly large in the stowage position of the leg support part, since the relevant force vector becomes comparatively large in the direction orthogonal to the first connection straight line. Due to the smaller included angle in the functional position of the leg support part, the force vector in question is substantially smaller in the functional position and thus significantly reduces the effect of the second spring.

The said straight lines of connection shoot in the front Endrelativstellung of the support member and thus in the stowed position of the Beinauflageteils preferably an angle of> 10, in particular> 15 °. In the opposite rear end relative position of the support member and thus the Functional position of the leg rest part, this angle is preferably less than 10 °, in particular preferably less than 5 °.

Based on the pivoting movement of the legrest part, it is particularly advantageous if, starting from the stowed position of the legrest part, the pivotal movement of the legrest part in the direction of its functional position, at least during the first 30 ° of this movement, especially within the first 15 °, to a continuous decrease of the angle between the two connecting lines leads.

With reference to the stowage position of the leg rest part, it is particularly advantageous if the second spring is designed and tuned to the position of the third and the fourth articulation point such that the spring force of the second spring is at least 20 N. As a result, the stowed position of the legrest part can be well ensured.

Although a plurality of second springs may be provided which have identical articulation points with respect to said projection plane, it is advantageous that only one such spring is provided, which is in particular preferably arranged between two outer cheek parts of the base. Thus, the spring in the installed state of the fitting can hardly be seen from the outside, so that the aesthetic impression of the relevant piece of furniture is not disturbed.

Preferably, the spring is a helical spring, wherein in particular preferably the length of this helical spring in the relaxed state does not exceed 200 mm, in particular preferably 150 mm.

In addition to the fitting itself, the invention also relates to a piece of seating furniture which is equipped with such a fitting. Brief description of the drawings

Further advantages and aspects of the invention will become apparent from the claims and the following description of a preferred embodiment of the invention, which is explained with reference to illustrations. Showing:

1 and 2 a furniture fitting according to the invention in one

Stowed position and a functional position,

3a to 3d the fitting of Figs. 1 and 2 respectively in a perspective view and a sectional side view during the transition from the functional position of Fig. 3a in the stowed position of Fig. 3d.

Detailed description of the embodiment

First, the essential elements of the fitting and the two illustrated positions are explained with reference to FIGS. 1 and 2.

The fitting 10 shown has a base 20 at this base are front tabs 30 and rear tabs 40 hinged about a first axis 1 and a third axis 3 pivotally. The respective opposite ends of the tabs 30, 40 are hinged about a second axis 2 and a fourth axis 4 pivotally mounted on a support member 50.

The base is intended to be provided with a furniture foot, which allows the fixed location of the base to a substrate or the rotatable arrangement of the base against a substrate. The support member 50 serves to define the seat. The base 20, the support member 50, and the front tabs 30 and the rear tabs 40 together form a closed chain of four Segments which are connected to each other via said axis 1, 2, 3, 4. By the front and rear tabs 30, 40, a mobility of the support member 50 is given, which is clear from the two positions of FIGS. 1 and 2.

The supporting part can assume a front end position, which is in front of a furniture longitudinal axis 100, which is illustrated in FIG. 1, and a rear relative end position, which is illustrated in FIG. In this case pivots due to the different lengths of the front and rear tabs 30, 40, the support member. In its rear relative end position of FIG. 2, it is tilted by approximately 12 ° with respect to its orientation in the front end relative position of FIG. 1.

At the front end of the base 20 is followed by a pivotable about a pivot axis 5 hinged leg rest part 70 at. As can be seen from Figs. 1 and 2, this leg rest portion 70 is in a stowage position illustrated in Figure 1 when the support member 50 is in its forward end position. If the support member 50 in its rear end position, as shown in Fig. 2, so is the Beinauflageteil in a functional position. It can be used in upholstered form as a support for the legs of a person sitting on the piece of furniture.

The movement of the leg rest member 70 is positively coupled with the movement of the support member 50 relative to the base 20. This is achieved in that the leg support part 70 is pivotally connected not only to the pivot axis 5 to the base 20, but by means of an additional tab 60 and the support member 50th

The fitting 10 has a first spring 80, the rear first pivot point 81 is provided on the support member 50 and the front second pivot point 82 is provided on one of the base 20 associated traverse 22. It should be mentioned in this context that reason of limitations of the graphics program, with which the figures were created, the figures appear to appear as if the first spring 80 is not hooked at its rear pivot point. In the assembled state of the fitting, however, this is given.

The first spring 80 is stretched in the Figs. 1 and 2 removable manner, when the support member 50 is displaced in its rear Endrelativlage. This spring serves the purpose of effecting the application of force to the support member 50 in that a person sits on the seat, not to cause an immediate and sudden transition of the fitting from the state of Fig. 1 in the state of Fig. 2. Instead, this transition should be subdued. For this purpose, the first spring 80 is designed. Although the first spring 80 has the effect that the support member 50 is subjected to force in the direction of its front relative end position of FIG. 1 and this is due to the positive coupling and the pivoting of the Beinauflageteils 70 in the stowage position of FIG. 1, the spring force of the first spring 80 is not sufficient to hold the leg rest 70 in the position of FIG. 1. However, a stronger first spring 80 would prevent the functioning of the hardware as a whole.

Therefore, a second spring 90 is provided, which extends between a third articulation point 93 on the support part 50 and a fourth articulation point 94 on the cross member 22 of the base part 20. This second spring 90 is centered on a furniture transverse axis 102, so that it is not visible when the fitting 10 is integrated into a piece of furniture. Said second spring 90 serves the purpose of pulling the leg support part 70 into the stowage position of FIG. 1. To make this possible, without thereby also achieving the undesired effect that the second spring 90 complicates the transfer of the fitting 10 and in particular the leg support part 70 in its functional position of FIG. 2, a design of the geometrical conditions relevant for this purpose is provided. see, which is explained with reference to the lower side view of Fig. 3a.

This lower illustration represents the projection plane already mentioned above, which is defined by the furniture vertical axis 104 and the furniture longitudinal axis 100. In Fig. 3a, the first and the second axis 1, 2 and the third pivot point 93 and the fourth pivot point 94 of the second spring 90 are registered. The second spring 90 is hidden as well as in Figures 3b to 3d for better comprehensibility.

Since both the second axis 2 and the third pivot point 93 are provided on the support member 50, they are mutually spaced in the projection plane of Fig. 3a, below, invariably spaced, in this case by almost 40 mm. Since the first pivot axis 1 and the fourth pivot point 94 on a common component, namely the base 20, are provided, these are also fixedly spaced from each other, in this case by about 25 mm.

In the initial position of Fig. 3a, in which the Beinauflageteil 70 is in its functional position and the support member 50 is located in its rear relative end position relative to the base member 20, is a first connecting degrees 1 1 1, which intersects the first and second axes 1, 2 and thus represents the orientation of the front flap 30, aligned almost parallel to a second connecting levels 1 12, which intersects the articulation point 93, 94 and thus represents the extension of the second spring 90. The included angle between the two lines 1 1 1, 1 12 is well below 10 °.

This small angle causes the spring force unfolds almost no effect, because their first straight line 1 1 1 parallel force vector corresponds almost to their resultant force vector. The force vector orthogonal to it, which is actually an effective force is suppression of the support member 50 relative to the base 20 leads, in contrast, is very small.

If, starting from this starting position of FIG. 3 a, a transfer to the final state of FIG. 3 g is carried out, the leg support part 70 simultaneously pivots downward, counterclockwise, with reference to FIG. 3 a, while the support part 50 moves forward relative to the furniture longitudinal axis 100 is relocated.

As shown in FIGS. 3 b and 3 c, this does not lead to an enlargement of the angle between the connecting lines 1 1 1, 1 12 enclosed angles over the majority of the pivoting distance of the leg support part 70. In fact, the included angle initially becomes smaller. If, however, the movement of the leg support segment continues in the direction of its stowage position of FIG. 3d, this angle increases again until it reaches its maximum in the stowed state of the leg rest part 70 of FIG. 3d. In this state, the angle is 17 °, so that a relevant part of the spring force, which is provided by the second spring 90 is available in the form of an orthogonal to the first connecting line 1 1 1 force vector available. This effective part of the spring force of the spring 90 pulls in the state of Fig. 3d, the support member 50 in the region of its front end down, which is pressed due to the described positive coupling the Beinauflageteil 70 in the stowed position of Fig. 3d and so reliable in this stowage position is secured.

If in the opposite direction, the transition from the stowed position of FIG. 3d in the functional position of the leg rest portion 70 of FIG. 3a is desired, the second spring 90 deployed only over a very small pivoting angle of the leg rest portion 70 of about 15 °, a significant effect. As soon as this pivoting range has been left, which corresponds approximately to the state of FIG. 3c, the spring 90 behaves in the same way as in FIG. Because of the almost given parallelism of the connecting line 1 1 1, 1 12 energetically almost neutral and thus does not interfere with the transfer of the leg support part in the functional state of Fig. 3a.

Claims

claims

A fitting (10) for a piece of seating furniture comprising:

a base (20) for fixed or rotatable about a vertical axis movable arrangement on a substrate, a support member (50) for a seat, which is movable relative to the base (20) between a front Endrelativlage and a rear end relative position,

a front and a rear flap (30, 40), wherein

the front flap (30) is pivotable relative to the base (20) about a first axis (1) fixed to the base and the front flap (30) and about a second axis fixed to the supporting part (50) and the front flap (30) ( 2) relative to the support member (50) is pivotable, and

the rear flap (40) is pivotable relative to the base (20) about a third axis (3) fixed to the base and the rear flap (40) and about a fourth axis fixed to the supporting part (50) and the rear flap (40) ( 4) relative to the support member (50) is pivotable,

and

a Beinauflageteil (70) which is pivotable between a stowage position under the base (20) and a functional position in front of the base (20) and its relative position to the base (20) with the relative position of the support member (50) relative to the base (20) positively coupled is that the leg rest member (70) assumes its operative position when the support member (50) is disposed in its rear Endrelativlage, and assumes its stowed position when the support member (50) is arranged in its front Endrelativlage. a first spring (80) is provided between a first and a second articulation point (81, 82) on the support part (50) and on the base part (20), which causes a force application of the support part (50) in the direction of its front end relative position,

characterized in that

a second spring (90) is provided, on the one hand at a third articulation point (93) which is spaced from the first articulation point (81) and the second articulation point (82) on the support member (50) and on the other hand at a fourth articulation point (94 ) is attached to the base part (20) and acts on approaching the Beinauflagenteils (70) to its stowed position between the support member (50) and the base part (20) such that the Beinauflageteil (70) is subjected to force in the direction of its stowed position.

2. fitting (10) for a piece of seating furniture according to claim 1,

characterized in that

Leg rest member (70) is operatively coupled to the front flap (30) such that it is pivotable in an identical direction to the base (20) as the front flap (30).

3. fitting (10) for a piece of seating furniture according to claim 1 or 2, characterized in that

the articulation points (93, 94) of the second spring (90) are arranged such that the second spring (90) in the front end relative position of the support part (50) is shortened relative to the rear end relative position.

4. fitting (10) according to any one of the preceding claims,

characterized in that the third articulation point (93) of the second spring (90) is spaced from the second axis (2), preferably by at least 5 mm and / or by a maximum of 50 mm.

5. fitting (10) according to any one of the preceding claims,

characterized in that

the fourth articulation point (94) of the second spring (90) is spaced from the first axis (1), preferably by at least 5 mm and / or by a maximum of 40 mm.

6. Fitting (10) according to one of the preceding claims,

characterized in that

the third articulation point (93) is arranged relative to the second axis (2) and the fourth articulation point (94) is positioned relative to the first axis (1) such that in the front end relative position of the support part (50) with respect to the base part (20) Connecting straight line (1 1 1) between the first and the second axis (1, 2) with a second connecting line (1 12) between the third and the fourth pivot point (93, 94) forms an angle> 10 °, preferably an angle> 15 °.

7. Fitting (10) according to one of the preceding claims,

characterized in that

the third articulation point (93) is arranged relative to the second axis (2) and the fourth articulation point (94) relative to the first axis (1) such that in the rear end relative position of the support part (50) with respect to the base part (20) Connecting straight line (1 1 1) between the first and the second axis (1, 2) with a second connecting line (1 12) between the third and the fourth pivot point (93, 94) forms an angle <10 °, preferably an angle <5 °.

8. fitting (10) according to any one of the preceding claims,

characterized in that

the third articulation point (93) is arranged relative to the second axis (2) and the fourth articulation point (94) is positioned relative to the first axis (1) such that a first connecting straight line (11) is arranged between the first and the second axis (1 , 2) with a second connecting line (1 12) between the third and the fourth articulation point (93, 94) in the front end relative position of the support member (50) occupies a greater angle than in the rear relative position of the support member (50).

9. fitting (10) according to any one of the preceding claims,

characterized in that

the third articulation point (93) is arranged relative to the second axis (2) and the fourth articulation point (94) is positioned relative to the first axis (1) such that a displacement in the support part (50) starts from the front end relative position of the support part (50) ) leads in the direction of its rear end position that the included angle between a first connecting line (1 1 1) between the first and the second axis (1, 2) and a second connecting line (1 12) between the third and the fourth pivot point ( 93, 94) decreases continuously at least over a pivot angle of 30 °.

10. fitting (10) according to any one of the preceding claims,

characterized in that

the third and fourth articulation points (93, 94) of the second spring (90) are arranged and tuned to the second spring (90) such that the spring force of the second spring (90) in the front end relative position of the support member is at least 20 Newtons is.

1 1. Fitting according to one of the preceding claims, characterized in that

the second spring (90) is arranged in the direction of the axes (1, 2, 3, 4) between two outer cheek parts (24) of the base (20) with respect to a transverse direction (102) of the fitting (10).

12. Fitting according to one of the preceding claims,

characterized in that

the second spring (90) is designed as a helical spring.

13. Seating furniture with a fitting,

the fitting (10)

a base part (20),

a support member (50) to which a seat surface is attached, and a leg rest member (70) to which a leg rest is attached;

having,

characterized in that

the fitting (10) according to one of claims 1 to 12 is formed.