Furniture fittings with multi-joint mechanism

Abstract

A furniture fitting (10), in particular for movably supporting a two-part furniture flap (2) on a furniture cabinet (11), has a base (5) connected or connectable to the furniture cabinet (11), an assembly device (4) connected or connectable to the furniture flap (2), and at least one, in particular exactly one, actuating arm (3), the actuating arm being pivotally supported or supportable at a first end on the base (5) about a rotation axis, and the at least one actuating arm (3) being connected or connectable at a second end opposite the first end to the assembly device (4) via at least one multi-joint mechanism (6), in which the at least one multi-joint mechanism (6) has at least three, preferably at least four, particularly preferably exactly four joints (611, 612, 621, 622), each with one rotation axis.

Description

[Technical Field]

[0001] The present invention relates to a furniture fitting for movably supporting a furniture flap, in particular a two-part furniture flap, on a furniture cabinet, in the manner described in the preamble of claim 1. The invention further relates to a piece of furniture comprising the furniture fitting, as described in claim 12.

[0002] Furniture fittings of the type described above are already known in the prior art in a wide variety of configurations.

[0003] As an example of the prior art, reference is made herein to AU Patent No. 413418. Figures 1a, 1b and 2a, 2b of the present application show an embodiment of AU Patent No. 413418. Figures 1a, 1b show the furniture with the furniture flaps closed, and Figure 1b is a detail of Figure 1a. Figures 2a, 2b show the furniture with the furniture flaps open, and Figure 2b is a detail of Figure 2a.

[0004] The illustrated furniture 1 includes a furniture fitting and has a two-part furniture flap 2, where a first flap part 21 is normally positioned on top in the assembled position and a second flap part 22 is normally positioned on the bottom in the assembled position. The first flap part 21 and the second flap part 22 are rotatably connected via a flap-flap hinge 7. The first flap part 21 is further rotatably connected to a furniture cabinet 11 of the furniture 1 via a cabinet-flap hinge 9.

[0005] The furniture 1 has at least one, in particular two furniture fittings with at least one, in particular exactly one, actuating arm 3. This actuating arm 3 is rotatably connected to a furniture cabinet 11, in particular to a furniture side wall 12 (not clear from Figures 1a, 1b and 2a, 2b).

[0006] Furthermore, at least one furniture fitting has an actuating arm-flap hinge 8, which rotatably connects the actuating arm 3 to the second flap part 22. In this case, the connection is arranged below the flap-flap hinge 7, in particular in the region of the lower edge 23 of the second flap part 22.

[0007] In this case, the hinges are each configured with a rotation joint and a rotation axis, all of which are arranged parallel to one another. The rotation axes of the four hinges thus form the four corners of a rectangle that is deformed when opening and closing. In the closed position (Figs. 1a and 1b), the rectangle is "stretched," while in the open position (Figs. 2a and 2b), the rectangle has a larger surface area.

[0008] A known drawback of such a furniture flap 2 (also known from many other documents) is the bending in the area of ​​the flap-flap-hinge 7 in the substantially closed position of the furniture flap. In this case, the rectangle formed by the revolute joint is almost stretched, so that the flap-flap-hinge risks bending in the "wrong" direction, i.e. towards the furniture cabinet 11.

[0009] This is problematic because the bent state of the furniture flap 2 blocks the opening movement of the furniture flap 2. To allow the opening movement of the furniture flap 2, this bending must first be reversed.

[0010] Bending of the furniture flap 2 occurs particularly when the user pulls the lower edge 23 of the second flap portion 22 outward (away from the furniture cabinet 11) as is normally done with conventional furniture having a one-piece flap.

[0011] AU Patent No. 413418 partially solves this problem. The rotation axis 71 of the flap-flap hinge 7 is arranged in the area of ​​the wall thickness S of the upper flap part 21, and for this purpose the flap-flap hinge 7 has a hinge pot 72. Furthermore, the hinge arm 73 connecting the first flap part 21 and the second flap part 22 to each other is provided with a base 74. The base 74 abuts against the first flap part 21, in particular against the hinge pot 72, when the furniture flap 2 is closed.

[0012] The abutment of the base 74 partially prevents bending of the flap-flap-hinge 7 .

[0013] A drawback of this prior art is that the position of the base 74 is extremely critical. If the abutment of the base 74 is only slightly misaligned in the direction toward the interior of the furniture cabinet 11, the bending of the furniture flap 2 cannot be avoided, and the above-mentioned problem still occurs. If the abutment of the base 74 is only slightly misaligned in the direction toward the exterior of the furniture cabinet 11, the furniture flap 2 will no longer close completely. This may cause objects to fall off the furniture 1, and the furniture front will not have a beautiful, unified appearance.

[0014] This situation requires precise adjustment of the flap-flap-hinge 7 and great dimensional stability of all materials involved, which makes construction and assembly a high effort.

[0015] Starting from this prior art, the object of the present invention is to provide a furniture fitting and a piece of furniture equipped with such a furniture fitting, which at least partially overcomes or reduces the above-mentioned drawbacks.

[0016] In particular, it would be desirable to provide furniture fittings for furniture that substantially avoid bending of furniture flaps.

[0017] This problem is solved by the features of claims 1 and 12.

[0018] A furniture fitting according to the invention, in particular for movably supporting a two-part furniture flap on a furniture cabinet, has a base body connected or connectable to the furniture cabinet, an assembly device connected or connectable to the furniture flap, and at least one, in particular exactly one, actuating arm, which is supported or supportable at a first end on the base body so as to be pivotable about a rotation axis.

[0019] According to the invention, at least one actuating arm is connected or connectable at a second end opposite the first end to the assembly device via at least one multi-joint mechanism, where it is envisaged that the at least one multi-joint mechanism has at least three, preferably exactly four, joints, each with one axis of rotation.

[0020] By using a multi-joint mechanism with two or more joints instead of a single-joint flap-flap hinge as known from the prior art, the instantaneous center of rotation of the furniture flap's movement, i.e. the projection of the instantaneous virtual axis of rotation, can be selected according to the geometry of the multi-joint mechanism.

[0021] This allows the instantaneous center of rotation of the opening movement of the furniture flap in its substantially closed state to be shifted further inside the furniture cabinet or even to the rear of the furniture cabinet in the reference system of the stationary actuating arm.

[0022] The greater the distance of the (virtual) rotation axis from the furniture flap, the greater the (vertical) translational component and the smaller the rotational component of the furniture flap's movement. If the distance is large enough, bending of the furniture flap, which corresponds to the rotational movement, is dynamically prevented or at least reduced.

[0023] Since the prevention of bending is achieved in a purely dynamic manner, no precise adjustment of the base abutment is required.

[0024] In one embodiment, it is envisaged that the rotation axes of at least three joints are oriented parallel to one another.

[0025] It can be assumed that at least one multi-joint mechanism has at least two, preferably exactly two, connecting gear links, and that at least one actuating arm is pivotally connected to the mounting device by means of at least two connecting gear links. By selecting the arrangement of the at least two connecting gear links, the dynamics of the furniture flap, in particular the movement trajectory of the instantaneous center of rotation, can be adjusted.

[0026] At least one multi-joint mechanism has a first connecting transmission link and a second connecting transmission link, wherein: a first joint connecting at least one actuation arm to a first connecting transmission link; and / or a second joint connecting at least one actuation arm to a second connecting transmission link; and / or a third joint connecting the mounting device to the first connecting transmission link; and / or - a fourth joint connects the mounting device to the second connecting transmission link; It is assumed that:

[0027] Thereby, at least one actuating arm is connected to the assembly device, for example via a four-joint mechanism.

[0028] Furniture fittings are - in the first position - preferably extended - of the at least one multi-joint mechanism, the instantaneous centre of rotation of the movement of the assembly device is located, in the reference system of the stationary actuating arm, outside the at least one multi-joint mechanism, at the assembly position of the at least one furniture fitting, in particular inside the furniture cabinet, preferably in the rear two-thirds of the furniture cabinet, particularly preferably in the rear one-third of the furniture cabinet or at the rear of the furniture cabinet; and / or In the second position, preferably pivoted inwards, of the at least one multi-joint mechanism, the instantaneous centre of rotation of the movement of the assembly device is located in the area of ​​the at least one multi-joint mechanism in the reference frame of the stationary actuating arm. It may be assumed that the structure is formed as follows.

[0029] The instantaneous center of rotation corresponds to a projection of a virtual axis of rotation, which may be constructed by the intersection of two planes passing through the axis of rotation of the first joint and the axis of rotation of the third joint, or the axis of rotation of the second joint and the axis of rotation of the fourth joint.

[0030] In the first, preferably extended position of the furniture fitting, which the furniture fitting preferably assumes with the furniture flaps in a substantially closed position, the instantaneous centre of rotation is located outside the at least one multi-joint mechanism, in particular far inside the furniture cabinet or at the rear of the furniture cabinet, so that the furniture flaps have less tendency to bend.

[0031] In the second, preferably inwardly pivoted position of the furniture fitting, which the furniture fitting preferably assumes with the furniture flap in a substantially open position, the instantaneous centre of rotation is located in the area of ​​the at least one multi-joint mechanism, so that the multi-joint mechanism behaves similarly to a single-joint hinge in the substantially open position of the furniture flap.

[0032] At least one assembly device has an assembly plane onto which the furniture flap can be assembled, the assembly plane corresponding to the plane of the inner surface of the furniture flap in the assembled state.

[0033] The instantaneous center of rotation of the movement of the assembly device is arranged on the first side of the assembly plane in the reference system of the stationary actuating arm, and it may be assumed that the at least one actuating arm and / or the at least one multi-joint mechanism is also arranged on the first side of the assembly plane. This is preferably the case in the first position, preferably in the extended position, and in the second position, preferably pivoted inwards, of the at least one multi-joint mechanism, in particular in all positions.

[0034] In one embodiment, the at least one actuation arm has a connecting portion, and the at least one multi-joint mechanism is connected to the at least one actuation arm via the connecting portion, such that the multi-joint mechanism together with the connecting portion can be assembled to and disassembled from the actuation arm.

[0035] It may be envisaged that the at least one actuating arm is removably connected to the base. For this purpose, a base connection part is preferably provided, which can be connected to a guide sleeve of the at least one actuating arm and can be locked to the base. This allows the at least one actuating arm to be simply connected to the base, which may already be pre-assembled to the furniture cabinet.

[0036] It may be assumed that the at least one multi-joint mechanism has at least two connecting gear links, each of which has at least one, preferably exactly two, levers, in particular at least one lever having at least two holes, so that the connecting gear link may have, for example, two levers.

[0037] In one embodiment, the first joint of at least one multi-joint mechanism is formed as a hole in the connecting part, a hole in at least one lever of the first connecting gear link, and a pin; and / or the second joint of at least one multi-joint mechanism is formed as a hole in the connecting part, a hole in at least one lever of the second connecting gear link, and a pin; and / or the third joint of at least one multi-joint mechanism is formed as a hole in the mounting device, a hole in at least one lever of the first connecting gear link, and a pin; and / or The fourth joint of at least one multi-joint mechanism is formed as a hole in the mounting device, a hole in at least one lever of the second connecting gear link, and a pin. It is assumed that:

[0038] In one embodiment, at least one actuating arm has a connecting part and at least one multi-joint mechanism has at least two connecting gear links, each of which has at least two, preferably exactly two, levers, and the connecting part and / or the assembly device is arranged between the levers of the at least two connecting gear links and / or preferably between the levers of the at least two connecting gear links in the direction of the rotation axis, thereby achieving a stable multi-joint mechanism.

[0039] At least one actuation arm is length adjustable, preferably in this case: the length of at least one actuation arm can be fixed, in particular by a locking function and / or by a friction part, in particular by a friction part combined with a spring element that applies pressure to the friction part, and / or in particular by locking with at least one screw; and / or the length of at least one actuating arm is variable during the opening and / or closing movement of the furniture flap, and / or at least one actuation arm has a guide sleeve and a piston, the piston being slidable within the guide sleeve; and / or At least one actuation arm has a connecting portion, the connecting portion being slidable relative to the other portion of the at least one actuation arm. It may be assumed that.

[0040] On the one hand, during assembly and adjustment of the furniture fitting, the length adjustability can be used to adapt the at least one actuating arm to the size of the furniture, in particular to the size of the furniture flap.

[0041] In operation, the length of at least one actuation arm can be locked.

[0042] However, it may also be envisaged that the length of the actuating arm varies telescopically during the opening and / or closing movement.

[0043] At least one actuation arm may be torque-loadable, and preferably for this purpose -electric drive units and / or -Mechanical energy storage is provided in the base body, which makes it easy to operate the furniture flap.

[0044] It may be envisaged that the torque depends on the actuation angle of at least one actuation arm, so that the torque can be selected to, for example, counteract the weight of the furniture flap, thereby holding the furniture flap in each position.

[0045] Furthermore, it is envisaged that the electric drive unit can be controlled via a wireless or wired connection.

[0046] The present invention provides a furniture cabinet, in particular a furniture flap consisting of at least one two-part piece, and at least one piece of furniture fitting according to any one of claims 1 to 11, wherein at least one assembly device is assembled to the at least one furniture flap, at least one base is connected to the furniture cabinet, and at least one actuating arm is connected to the at least one assembly device by means of at least one multi-joint mechanism.

[0047] This allows the furniture flap to be held by at least one actuation arm, in which case the dynamics of the furniture flap can be adjusted by the dimensions of the multi-joint mechanism, in particular the dynamics can be selected such that bending is prevented in the substantially closed state of the furniture flap.

[0048] In one embodiment, at least one furniture flap has a first flap part, which is preferably arranged on the upper side in the assembled position, and a second flap part, which is preferably arranged on the lower side in the assembled position; the first flap portion is pivotally connected to the furniture cabinet; and the first flap portion is pivotally connected to the second flap portion;

[0049] The folding flap thus achieved has the advantage that it requires less space in the overall furniture.

[0050] It may be envisaged that the at least one assembly device is assembled to the second flap portion and that the at least one actuation arm is preferably connected to the second flap portion and not to the first flap portion by at least one multi-joint mechanism.

[0051] One embodiment is - in a substantially closed position of the at least one furniture flap, the at least one actuation arm is positioned substantially parallel to the first flap portion and the second flap portion; and / or In the substantially open position of the at least one furniture flap, the at least one actuating arm is at an angle of between 45° and 135° relative to the second flap portion. It is characterized by:

[0052] The furniture is in the substantially closed position of the at least one furniture flap, the instantaneous centre of rotation of the opening movement of the second flap part is located inside the furniture cabinet, preferably in the rear two-thirds of the furniture cabinet, particularly preferably in the rear one-third of the furniture cabinet or at the rear of the furniture cabinet, in particular outside the at least one multi-joint mechanism, in the reference system of the stationary actuating arm; and / or In the substantially open position of the furniture flap, the instantaneous center of rotation of the closing movement of the second flap part is located in the region of at least one multi-joint mechanism in the reference frame of the stationary actuating arm. It may be formed as follows.

[0053] This causes the multi-joint mechanism to behave similarly to a single-joint hinge in the substantially open position of the furniture flap.

[0054] In the substantially closed position of the furniture flap, the virtual axis of rotation (or instantaneous center of rotation) of the furniture flap is located outside the multi-joint mechanism, so that the movement of the furniture flap has a large translational component, which prevents the furniture flap from bending.

[0055] Further details and advantages of the invention are explained in more detail below with reference to the drawings based on the description of the drawings. [Brief explanation of the drawings]

[0056] [Figure 1a]FIG. 1 is a side view of a piece of furniture with closed furniture flaps and prior art furniture hardware. [Figure 1b] A detailed view of the flap-flap joint portion of Figure 1a. [Figure 2a] FIG. 1 is a side view of a piece of furniture with an open furniture flap and prior art furniture hardware. [Figure 2b] A detailed view of the flap-flap joint portion of Figure 2a. [Figure 3] 1 is a schematic diagram showing the action of an actuation arm on a furniture flap with a single joint hinge according to the prior art; FIG. [Figure 4] 10A-10C are schematic diagrams illustrating the action of an actuation arm on a furniture flap according to a multi-joint mechanism in accordance with one embodiment of the present invention. [Figure 5] FIG. 1 is a partial view of a piece of furniture with furniture hardware. [Figure 6] FIG. 1 is a view showing the furniture fitting alone. [Figure 7a] 10 shows the extended position of the multi-joint mechanism with the furniture flaps closed. FIG. [Figure 7b] FIG. 10 shows the multi-joint mechanism in an intermediate position pivoted inward. [Figure 7c] FIG. 10 shows the multi-joint mechanism in an intermediate position pivoted inward. [Figure 7d] 10A and 10B show the inward pivot position of the multi-joint mechanism with the furniture flaps open. [Figure 8a] FIG. 1 is a side view of the furniture fitting in an extended position. [Figure 8b] FIG. 2 is a side view of the furniture fitting in the inward pivot position. [Figure 9a] FIG. 2 is a perspective view of the furniture fitting in the inward pivot position. [Figure 9b] FIG. 2 is a perspective view of the furniture fitting in the inward pivot position. [Figure 10] FIG. 2 is an exploded view of the furniture fitting.

[0057] The prior art of Figures 1a, 1b and 2a, 2b has already been described above at the beginning of this specification.

[0058] Figure 3 shows a schematic representation of a piece of furniture with a furniture flap 2 having a first flap portion 21 and a second flap portion 22, together with the action of an actuation arm 3 on the furniture flap 2 as is common in the prior art.

[0059] The actuation arm 3 is pivotally connected to the furniture cabinet 11 by an actuation arm joint 51 in the base 5 (not shown here). In this case, only the rotation axis of the hinge is shown schematically (in perspective). At the opposite end of the actuation arm 3, the rotation axis of a single-joint actuation arm flap hinge 8 is shown. Via the actuation arm flap hinge 8, the actuation arm 3 is pivotally connected to the second flap part 22.

[0060] In a reference frame with a stationary actuating arm 3, for example when opening or closing the furniture flap 2, the movement of the second flap part 22 is restricted to rotation about the axis of rotation of the actuating arm-flap-hinge 8.

[0061] The axis of rotation is located at a distance X from the second flap portion 22. Because the axis of rotation is not located at the second flap portion 22, the movement of the second flap portion 22 does not correspond to a purely rotational movement in the reference frame with the stationary actuation arm 3, but also includes a translational movement component. The larger the distance X, the larger the ratio of the translational to rotational movement component. (As X tends to infinity, the movement of the second flap portion 22 corresponds to a translational movement that has lost its rotational component.)

[0062] In the substantially closed state of the furniture flap 2, the translational component of the movement of the second flap portion 22 results in a substantially vertical movement of the second flap portion 22.

[0063] The bending of the second flap portion 22 in the region of the flap-flap-hinge 7 corresponds to a rotational movement of the second flap portion 22 .

[0064] If the axis of rotation of the second flap portion 22 is shifted further into the furniture cabinet 11, i.e. if the distance X is increased, the tendency of the second flap portion 22 to bend in the area of ​​the flap-flap-hinge 7 is also reduced.

[0065] The spacing X cannot be arbitrarily increased in the prior art structure of FIG.

[0066] The spacing X may be, for example, at most 40 millimeters or at most 50 millimeters.

[0067] The increase in the distance X necessarily means that the actuating arm flap hinge 8 is also further away from the second flap portion 22. This also means that the actuating arm 3 is positioned further inside the furniture cabinet 11. This reduces the space inside the furniture cabinet 11, which could cause the actuating arm flap hinge 8 and / or the actuating arm 3 to collide with the intermediate bottom or other objects inside the furniture cabinet 11.

[0068] 4 shows a schematic diagram of an embodiment of a piece of furniture 1 according to the invention, in which the single-joint actuating arm-flap-hinge 8 has been replaced by a multi-joint mechanism 6.

[0069] The multi-joint mechanism 6 has four joints in the embodiment of FIG.

[0070] Multi-joint mechanisms usually have a virtual axis of rotation that does not coincide with one of the (four) joint axes of rotation. Depending on the position of the multi-joint mechanism 6, the virtual axis of rotation is located at another position, and as the hinges move, the virtual axis of rotation "moves" along a trajectory defined by the geometry of the multi-joint mechanism 6.

[0071] The imaginary axis of rotation is projected onto a plane perpendicular to the axis of rotation and is called the instantaneous center of rotation 66 of the motion.

[0072] In FIG. 4, the instantaneous center of rotation 66 of the movement of the second partial flap 22 is arranged at a distance Y from the second partial flap 22 in the closed state of the furniture flap 2 in a reference frame with the actuating arm 3 at rest.

[0073] The geometry of the instantaneous center of rotation 66 is constructed by the intersection of two imaginary lines extending through the axes of rotation of the joints of the connecting transmission links 61,62.

[0074] 4, the distance Y can vary depending on the geometry of the multi-joint mechanism 6. In particular, in this case, the instantaneous center of rotation 66 can be said to be located further inside the furniture cabinet 11 than the multi-joint mechanism 6 itself.

[0075] That is to say, the distance Y and the distance of the multi-joint mechanism 6 from the second partial flap 22 can be configured to a certain extent independently of each other. In the prior art of FIG. 3, this possibility is not present.

[0076] The spacing Y may be, for example, greater than 80 millimeters, or greater than 70 millimeters.

[0077] The spacing Y may be such that the instantaneous center of rotation 66 is located within the rear two-thirds or the rear one-third of the furniture cabinet 11. The instantaneous center of rotation 66 may also be located at the rear of the furniture cabinet 11.

[0078] A large distance Y increases the ratio of translational to rotational components of the motion of the second flap portion 22 in the frame of reference with the stationary actuation arm 3. This reduces the tendency for bending by configuring the dynamics of the multi-joint mechanism.

[0079] FIG. 5 shows a cross-section of a piece of furniture 1 comprising a furniture cabinet 11, a two-part furniture flap 2 and a furniture fitting 10, in which an assembly device 4 is assembled to at least one furniture flap 2, a base 5 is connected to the furniture cabinet 11 and an actuating arm 3 is connected to the at least one assembly device 4 by a multi-joint mechanism 6.

[0080] The furniture cabinet 11 has a top surface 13 and a bottom surface 14. Also shown are the side walls 12 to which the base 5 is assembled.

[0081] Typically, two furniture fittings 10 are assembled to movably support the furniture flap 2, as is the case in the prior art.

[0082] The furniture flap 2 has a first flap portion 21 arranged upward in the assembled position and a second flap portion 22 arranged downward in the assembled position, the first flap portion 21 being pivotally connected to the furniture cabinet 11, and the first flap portion 21 being pivotally connected to the second flap portion 22.

[0083] The assembly device 4 of the furniture fitting 10 is assembled to the second flap portion 22, and the actuating arm 3 is connected to the second flap portion 22, rather than the first flap portion 21, by the multi-joint mechanism 6.

[0084] In the substantially open position of the at least one furniture flap 2, the actuation arm 3 is at an angle of between 45° and 135° relative to the second flap portion 22.

[0085] In the substantially closed position of the at least one furniture flap 2, the actuation arm 3 is positioned substantially parallel to the first flap portion 21 and the second flap portion 22. This is not shown in Figure 5.

[0086] Figure 6 shows the furniture fitting 10 of Figure 5 in isolation. The furniture fitting, in particular for movably supporting a two-part furniture flap 2 on a furniture cabinet 11, has a base 5 connected or connectable to the furniture cabinet 11, an assembly device 4 connected or connectable to the furniture flap 2, and an actuating arm 3, which is supported or supportable at a first end on the base 5 so as to be pivotable about an axis of rotation.

[0087] At a second end opposite the first end, the actuating arm 3 is connected or connectable to the assembly device 4 via at least one multi-joint mechanism 6, in which case the at least one multi-joint mechanism 6 has four joints 611, 612, 621, 622, each with one axis of rotation.

[0088] The operating arm 3 has a guide sleeve 32 and a piston 33, and the piston 33 is slidable within the guide sleeve 32. This allows the operating arm 3 to be guided so that its length can be adjusted.

[0089] The length of the actuation arm 3 may be fixable by a locking function and / or by a friction part 35, in particular by a friction part 35 combined with a spring element 34 (see Figure 10) that applies pressure to the friction part 35, and / or in particular by a lock with at least one screw.

[0090] The length of the actuating arm 3 may be dynamically changeable during the opening and / or closing movement of the furniture flap 2, so that the actuating arm 3 can meet the requirements imposed by the dynamics of the assembly consisting of the furniture fitting 10 and the furniture 1, for example.

[0091] The actuating arm 3 may be torque-loadable and, preferably for this purpose, -electric drive units and / or -Mechanical energy storage is provided in the base body 5.

[0092] The rotation axes of the four joints are oriented parallel to one another.

[0093] 7a to 7d show the multi-joint mechanism 6 in various positions.

[0094] The actuation arms 3 have connecting portions 31 , and the multi-joint mechanism 6 is connected to at least one actuation arm 3 via the connecting portions 31 .

[0095] The connecting portion 31 may be formed so as to be slidable relative to the other portion of the actuating arm 3. This makes the length of the actuating arm 3 adjustable.

[0096] The multi-joint mechanism 6 has at least two connecting transmission links 61,62, and at least one actuating arm 3 is pivotally connected to the assembly device 4 by at least two connecting transmission links 61,62.

[0097] The multi-joint mechanism 6 has a first connecting transmission link 61 and a second connecting transmission link 62, in which: a first joint 611 connecting the actuating arm 3 to the first connecting transmission link 61; a second joint 612 connecting the actuating arm 3 to the second connecting transmission link 62; the third joint 621 connects the assembly device 4 to the first connecting transmission link 61; A fourth joint 622 connects the assembly device 4 to the second connecting transmission link 62 .

[0098] The intersection of two imaginary lines extending through the rotation axis of the first joint 611 and the rotation axis of the third joint 621 or the rotation axis of the second joint 612 and the rotation axis of the fourth joint 622 and perpendicular to these rotation axes corresponds to the position of the instantaneous center of rotation 66 of the movement of the second flap part 22 and the assembly device 4 in the reference frame with the actuating arm 3 at rest.

[0099] In Figure 7a the multi-joint mechanism 6 is shown in the "extended" position, which is the position that the multi-joint mechanism 6 assumes in the substantially closed position of the furniture flap 2.

[0100] In this case, the instantaneous center of rotation is located outside the multi-joint mechanism 6.

[0101] This avoids bending of the furniture flap 2 in its substantially closed position.

[0102] In the assembled state, the instantaneous center of rotation is located inside the furniture cabinet 11, preferably in the rear two-thirds of the furniture cabinet 11, particularly preferably in the rear one-third of the furniture cabinet 11 or at the rear of the furniture cabinet 11.

[0103] In figures 7b and 7c the multi-joint mechanism 6 is shown in an intermediate position. When the furniture flap 2 is substantially open the multi-joint mechanism 6 assumes the position shown in figure 7d.

[0104] The instantaneous centre of rotation is located in the region of the multi-joint mechanism 6, in particular in the region of the second connecting transmission link 62, in FIGS.

[0105] This causes the multi-joint mechanism 6 to behave like a single-joint hinge in intermediate positions and when the furniture flap 2 is substantially open.

[0106] In all positions of Figures 7a to 7d, the instantaneous centre of rotation of the movement of the second flap part 22 and of the assembly device 4 is arranged on a first side of the assembly plane of the second flap part 22 in the reference frame of the stationary actuating arm 3, and in this case the at least one actuating arm 3 and the at least one multi-joint mechanism 6 are also arranged on the first side of the assembly plane.

[0107] Figures 8a and 8b show the furniture fitting 10 without the base body 5. In Figure 8a, the multi-joint mechanism 6 is shown in an "extended" position, and in Figure 8b, the multi-joint mechanism 6 is shown in an inward pivoted position.

[0108] 9a and 9b show the furniture fitting 10 in an inward pivoted position, without the base body 5, in two different perspective views.

[0109] FIG. 10 shows an exploded view of the furniture fitting 10.

[0110] The multi-joint mechanism 6 has two connecting transmission links 61 and 62, each of which has two levers 63, and each of the levers 63 has two holes 64.

[0111] The first joint 611 of the multi-joint mechanism 6 is formed as a hole 64 in the connecting part 31 , holes 64 in both levers 63 of the first connecting transmission link 61 , and a pin 65 .

[0112] The second joint 612 of the multi-joint mechanism 6 is formed as a hole 64 in the connecting part 31 , holes 64 in both levers 63 of the second connecting transmission link 62 , and a pin 65 .

[0113] The third joint 621 of the multi-joint mechanism 6 is formed as a hole 64 in the assembly device 4 , holes 64 in both levers 63 of the first connecting transmission link 61 , and a pin 65 .

[0114] The fourth joint 622 of the multi-joint mechanism 6 is formed as a hole 64 in the assembly device 4 , holes 64 in both levers 63 of the second connecting transmission link 62 , and a pin 65 .

[0115] The connecting part 31 and the assembly device 4 are arranged between the two levers 63 of the two connecting transmission links 61, 62, preferably in the direction of the rotation axis between the two levers 63 of the two connecting transmission links 61, 62.

[0116] As a result, the multi-joint mechanism 6 is constructed in a multi-layered and stable manner.

[0117] In this case, the friction part 35, which fixes the guide sleeve 32 of the actuation arm 3 and the piston 33 to one another, can also be clearly seen. The fixation can be achieved in combination with a spring element 34, which applies pressure to the friction part 35.

[0118] The actuation arm 3 is detachably connected to the base body 5. For this purpose, a base connection part 36 is provided, which can be connected to the guide sleeve 32 of the actuation arm 3 and locked to the base body 5. This allows the actuation arm 3 to be easily connected to the base body 5, even if the base body 5 is already pre-assembled in a piece of furniture. [Explanation of symbols]

[0119] 1 Furniture 10 Furniture fittings 11 Furniture Cabinet 12 Furniture side wall 13 Top side 14 Bottom 2 Furniture Flap 21 First flap part 22 Second flap part 23 Lower edge of second flap portion 3 Actuating Arm 31 Connection part 32 Guide sleeve 33 Piston 34 Spring element 35 Friction part 36 Base connection part 4 Assembly equipment 5 Base 51 Actuating arm joint 6 Multi-joint mechanism 60 joints 611 First Joint 612 Second Joint 621 Third Joint 622 Fourth Joint 61 first connecting transmission link 62 second connecting transmission link 63 Lever 64 holes 65 pins 66 Instantaneous rotation center 7 Flap-flap-hinge 71 Flap-flap-hinge rotation axis 72 Hinge Pot 73 Hinge Arm 74 base 8 Actuating Arm Flap Hinge 9 Cabinet Flap Hinges

Claims

1. A furniture fitting (10) for movably supporting a furniture flap (2) on a furniture cabinet (11), the furniture fitting having a base (5) connected or connectable to the furniture cabinet (11), an assembly device (4) connected or connectable to the furniture flap (2), and at least one actuation arm (3), the actuation arm being pivotally supported or supportable at a first end on the base (5) about an axis of rotation, the at least one actuating arm (3) is connected or connectable at a second end opposite to the first end to the assembly device (4) via at least one multi-joint mechanism (6), the at least one multi-joint mechanism (6) having at least three joints (611, 612, 621, 622) each with one axis of rotation; said at least one actuating arm (3) being torqueable; In the extended position of the multi-joint mechanism (6), the instantaneous center of rotation of the movement of the assembly device (4) is located outside the multi-joint mechanism (6) in the reference frame of the stationary working arm (3), In the inward pivoting position of the multi-joint mechanism (6), the instantaneous center of rotation of the movement of the assembly device (4) is located in the area of ​​the multi-joint mechanism (6) in the reference frame of the stationary working arm (3). A furniture hardware (10) characterized by:

2. 2. The furniture fitting (10) of claim 1, wherein the furniture flap (2) is a two-part furniture flap.

3. 3. The furniture fitting (10) according to claim 1 or 2, wherein the rotation axes of the at least three joints (611, 612, 621, 622) are oriented parallel to one another.

4. 4. The furniture fitting (10) according to claim 1, wherein the at least one multi-joint mechanism (6) has at least two connecting transmission links (61, 62), and the at least one operating arm (3) is pivotally connected to the assembly device (4) by the at least two connecting transmission links (61, 62).

5. The at least one multi-joint mechanism (6) comprises a first connecting transmission link (61) and a second connecting transmission link (62), wherein: a first joint (611) connecting said at least one actuating arm (3) to said first connecting transmission link (61); and / or a second joint (612) connecting said at least one actuating arm (3) to said second connecting transmission link (62), and / or a third joint (621) connecting said assembly device (4) to said first connecting transmission link (61), and / or a fourth joint (622) connecting said assembly device (4) to said second connecting transmission link (62); The furniture fitting (10) according to any one of claims 1 to 4.

6. a) the base (5) has an upper side and a lower side in an assembled position, the upper side of the furniture fitting (10) faces the top surface (13) of the furniture cabinet (11), and an actuating arm joint (51) is located adjacent to the upper side of the base (5); and / or b) the furniture fitting (10) has only one assembly device (4), and the actuation arm (3) is connected to the assembly device (4) by a multi-joint mechanism (6), and / or c) said actuation arm (3) is substantially straight; The furniture fitting (10) according to any one of claims 1 to 5.

7. 7. The furniture fitting (10) according to claim 6, wherein in the extended position of the at least one multi-joint mechanism (6), the instantaneous center of rotation of the movement of the assembly device (4) is located in the reference system of the stationary actuating arm (3) in the rear two-thirds of the furniture cabinet (11), or in the rear one-third of the furniture cabinet (11), or at the rear of the furniture cabinet (11) in the assembly position of the at least one furniture fitting (10).

8. 8. The furniture fitting (10) according to any one of claims 1 to 7, wherein the at least one actuating arm (3) has a connecting portion (31), and the at least one multi-joint mechanism (6) is connected to the at least one actuating arm (3) via the connecting portion (31).

9. 9. The furniture fitting (10) according to claim 1, wherein the at least one multi-joint mechanism (6) has at least two connecting transmission links (61, 62), and the at least two connecting transmission links (61, 62) each have at least one lever (63).

10. 10. The furniture fitting (10) of claim 9, wherein the at least one lever (63) has at least two holes (64).

11. a first joint (611) of said at least one multi-joint mechanism (6) is formed as a hole (64) in said connecting part (31), a hole (64) in said at least one lever (63) of said first connecting transmission link (61), and a pin (65); and / or the second joint (612) of the at least one multi-joint mechanism (6) is formed as a hole (64) in the connecting part (31), a hole (64) in the at least one lever (63) of the second connecting transmission link (62), and a pin (65); and / or the third joint (621) of the at least one multi-joint mechanism (6) is formed as a hole (64) in the assembly device (4), a hole (64) in the at least one lever (63) of the first connecting transmission link (61), and a pin (65); and / or the fourth joint (622) of the at least one multi-joint mechanism (6) is formed as a hole (64) in the assembly device (4), a hole (64) in the at least one lever (63) of the second connecting transmission link (62), and a pin (65); The furniture hardware (10) according to claim 9, which recites claims 5 and 8.

12. 12. The furniture fitting (10) according to any one of claims 1 to 11, wherein the at least one actuating arm (3) has a connecting part (31), the at least one multi-joint mechanism (6) has at least two connecting transmission links (61, 62), the at least two connecting transmission links (61, 62) have at least two levers (63), and the connecting part (31) and / or the assembly device (4) are arranged between the two levers (63) of the at least two connecting transmission links (61, 62).

13. 13. The furniture fitting (10) according to claim 12, wherein the connecting part (31) and / or the assembly device (4) is arranged between the two levers (63) of the at least two connecting transmission links (61, 62) in the direction of the rotation axis.

14. 14. The furniture fitting (10) according to any one of claims 1 to 13, wherein the at least one actuating arm (3) is length adjustable.

15. the length of said at least one actuating arm (3) is fixable, and / or the length of said at least one actuating arm (3) is variable during the opening and / or closing movement of said furniture flap (2), and / or said at least one actuating arm (3) comprises a guide sleeve (32) and a piston (33), said piston (33) being slidable within said guide sleeve (32); and / or - said at least one actuating arm (3) has a connecting portion (31), said connecting portion (31) being slidable relative to the other portions of said at least one actuating arm (3); The furniture hardware (10) of claim 14.

16. 15. The furniture fitting (10) according to claim 14, wherein the length of the at least one actuating arm (3) can be fixed by a locking function and / or by a friction part (35) combined with a spring element (34) exerting pressure on the friction part (35) and / or by a lock with at least one screw.

17. For the torque load, - an electric drive unit and / or - Mechanical energy storage is provided in the base (5), 17. Furniture fitting (10) according to any one of claims 1 to 16.

18. 18. The furniture fitting (10) according to any one of claims 1 to 17, wherein the torque depends on the actuation angle of the at least one actuation arm (3), thereby allowing the furniture flap (2) to be held in each position.

19. 19. A piece of furniture (1) comprising a furniture cabinet (11), at least one furniture flap (2), and at least one furniture fitting (10) according to any one of claims 1 to 18, wherein at least one assembly device (4) is assembled to the at least one furniture flap (2), at least one base (5) is connected to the furniture cabinet (11), and at least one actuating arm (3) is connected to the at least one assembly device (4) by at least one multi-joint mechanism (6).

20. The at least one furniture flap (2) has a first flap portion (21) and a second flap portion (22); - said first flap portion (21) is pivotally connected to said furniture cabinet (11), and / or - said first flap portion (21) is pivotally connected to said second flap portion (22); 20. Furniture (1) according to claim 19.

21. The first flap portion (21) is arranged on the upper side in the assembled position, The second flap portion (22) is disposed on the lower side in the assembled position. Furniture (1) according to claim 20.

22. 22. The furniture (1) according to claim 20 or 21, wherein the at least one assembly device (4) is assembled to the second flap portion (22), and the at least one actuating arm (3) is connected to the second flap portion (22) by the at least one multi-joint mechanism (6).

23. - in the closed position of said at least one furniture flap (2), said at least one actuating arm (3) is positioned parallel to said first flap part (21) and said second flap part (22), and / or - in the open position of said at least one furniture flap (2), said at least one actuating arm (3) is at an angle of between 45° and 135° relative to said second flap portion (22); Furniture (1) according to any one of claims 20 to 22.

24. The furniture (1) is - in the closed position of said at least one furniture flap (2), the instantaneous centre of rotation of the opening movement of said second flap part (22) is located inside said furniture cabinet (11) in the reference system of the stationary actuating arm (3); and / or - in the open position of the furniture flap (2), the instantaneous centre of rotation of the closing movement of the second flap part (22) is located in the area of ​​the at least one multi-joint mechanism (6) in the reference system of the stationary actuating arm (3); It is formed as follows: Furniture (1) according to any one of claims 20 to 23.

25. 25. The furniture (1) according to claim 24, wherein the furniture (1) is configured such that, in the closed position of the at least one furniture flap (2), the instantaneous center of rotation of the opening movement of the second flap portion (22) is located in the rear two-thirds of the furniture cabinet (11), or in the rear one-third of the furniture cabinet (11), or at the rear of the furniture cabinet (11) in the reference system of the stationary actuating arm (3).

26. 25. The furniture (1) according to claim 24, wherein the furniture (1) is configured such that, in the closed position of the at least one furniture flap (2), the instantaneous center of rotation of the opening movement of the second flap part (22) is located outside the at least one multi-joint mechanism (6) in the reference system of the stationary actuating arm (3).

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