EP3750452A1 - Furniture drive - Google Patents

Abstract

The invention relates to a furniture drive (3) for a piece of furniture (1), in particular seating and reclining furniture such as armchairs, beds and slatted frames (2), having at least one electric motor (3a) and at least two via a gear wheel (27) with the electric motor ( 3a) interacting spindle lifting threads (6a, 6b) for adjusting furniture components (2b, 2c), the at least two spindle lifting threads (6a, 6b) each having a threaded spindle (28) with opposing pitch directions, the threaded spindles (28) and the gear wheel ( 27) have a common axis of rotation, and a nut (29) is applied to the thread turns of each threaded spindle (28), which cannot be rotated, but is designed to be longitudinally displaceable and is guided in the housing (16) of the furniture drive (3), whereby Each nut (29) acts on an adjusting lever or pivot lever (7 '"7" ") which is coupled to the furniture component (2b, 2c) to be adjusted. The furniture drive (3) is characterized in that an ers one of the nuts (29) acts directly on the adjustment lever or pivot lever (7 '"7" ") assigned to it, and a second of the nuts (29) acts via an intermediate member (29a) on the adjustment lever or pivot lever (7'") assigned to it. 7 "") acts, with at least one coupling slide (30) being provided, which is arranged displaceably mounted between the first of the nuts (29) and the intermediate member (29a).

Description

The invention relates to an electromotive furniture drive, in particular for seating and / or reclining furniture such as armchairs, beds and slatted frames, according to the preamble of claim 1.

Such seating and / or reclining furniture has fixed and movable furniture components. Fixed furniture components are e.g. Frame components. Movable furniture components are e.g. Fixed or resilient support surfaces of an upholstery or a mattress of the seating and / or reclining furniture.

The electromotive furniture drive is used to adjust the movable furniture components. The adjustment movement and drive force generated by the electromotive furniture drive are transmitted to the respective movable furniture component, the electromotive furniture drive being supported on a fixed furniture component and the moving furniture component being adjusted relative to the fixed furniture component. The electromotive furniture drive can also be attached between two movable furniture components, whereby it can adjust them relative to one another.

A functional fitting couples the movable furniture components with the fixed furniture components and / or the movable furniture components with one another and is coupled to the electromotive furniture drive.

As an alternative to this, at least part of the functional fitting can be seen as self-sufficient and as an independent system if a coupling element of the functional fitting is mechanically coupled to the output element of the electromotive furniture drive. The functional fitting can comprise several coupling elements that are connected to one another. Such connections can be designed to be articulated. Other connections are permanent. The functional fitting can therefore also be understood as a lever chain or lever link chain, which can also have hinges. Another coupling element of the functional fitting is mechanically coupled to a furniture component. The connection can be made fixed. Alternatively, it is designed to be articulated. Other connections are movable or loose force supports.

Electromotive furniture drives and functional fittings are known from the prior art in a large number of different designs for different applications and purposes. Electromotive furniture drives are e.g. in use as single drives, double and multiple drives.

As a rule, furniture drives each have a motor, including a downstream gear, for each furniture component to be adjusted, which complicates the structure of the furniture drive and a control device assigned to it, and also makes it more expensive.

From the pamphlet WO 2005/122840 A1 a furniture drive designed as a double drive is known, with which two furniture components or assemblies can be adjusted with only one electric motor. To this end, the furniture drive has two threaded spindles which can be rotated jointly by one electric motor and which have opposite pitch directions of their threads. A respective threaded nut acts on the corresponding furniture component via a pivot lever. Due to different points of application of the threaded nuts on the pivot lever, one of the furniture components can be moved before the other. Any further independent movement of the furniture components is not possible, however.

One object of the invention is to provide a furniture drive and a functional fitting of the type mentioned at the outset, in which there are expanded possibilities for the independent movement of the furniture components with only one electric motor.

The problem is solved by a furniture drive with the features of claim 1. Advantageous configurations and developments are the subject of the dependent claims.

The furniture drive has an electric motor which interacts with at least two spindle lifting threads via a gear wheel to adjust several furniture components. One motor can thus advantageously be used for two or more adjustment functions.

The at least two spindle lifting threads each have a threaded spindle with an opposing pitch direction, the threaded spindles and the gear wheel have a common axis of rotation. Different directions of movement are thus possible in a simple manner.

It is also provided that a nut is applied to the thread turns of each threaded spindle, each nut being non-rotatable, but designed to be longitudinally displaceable and guided in the housing of the furniture drive, with each nut acting directly or via intermediate links on an adjusting lever or pivot lever, which is coupled to the associated furniture component and / or to a furniture component to be adjusted.

It is also provided that a head or back part nut is connected to the furniture component for adjusting the back part, and that a leg part nut is connected to the furniture component of the leg part and / or the foot part. The back part and the leg part and / or the foot part are thus effectively connected to the drive. Here, the back part nut acts directly on the back part of the furniture, and the leg part nut acts on the leg part of the furniture via an intermediate member. The functional connections are thus provided in a simple manner.

For this purpose, at least one coupling slide is also provided, which is arranged displaceably mounted between the back part nut and the intermediate member. This results in an advantageous further coupling option for the individual adjustment of the associated furniture parts.

When the motor is operated in a first direction of rotation to adjust the connected furniture components from the basic position, only the back and head sections are initially adjusted until the adjustment distance between the leg section nut and the intermediate link has reduced to zero, which then also causes the Leg foot part is also adjusted by the leg part nut and the intermediate link.

In a second direction of rotation of the motor, the back part nut moves in the direction of the leg part nut, actuates the coupling slide, which transfers the adjustment force generated by the back part nut to the intermediate member, which means that only the leg and foot part is adjusted as a furniture component. In other words, in this second direction of rotation of the motor, the back part nut only actuates the leg and foot parts via the intermediate links consisting of the intermediate link and coupling slide.

The coupling slide thus creates an independent adjustment option for one of the furniture components in the second direction of rotation.

In this case, guide means such as webs or recesses for the displaceable guidance of the at least one coupling slide can be provided in the housing in order to enable easy adjustment.

The coupling slide can be made in one piece or in several pieces. Different materials are also possible.

Figur 1

eine schematische Perspektivansicht eines ersten Beispiels eines Möbels in Form eines Bettes mit einem ersten Beispiel eines Funktionsbeschlags und einem elektromotorischen Möbelantrieb in Form eines Doppelantriebs;

Figur 2

eine Seitenansicht eines zweiten Beispiels eines Möbels in Form eines Lattenrostes mit Rahmen;

Figur 3

eine Seitenansicht einer Variante des zweiten Beispiels nach Figur 2;

Figur 4

eine Seitenansicht eines Lattenrosts mit einem zweiten Beispiel eines elektromotorischen Möbelantriebs;

Figur 5

eine Variante nach dem Beispiel nach Figur 4;

Figur 6-7

Schnittansichten eines Lattenrostes mit einem dritten Beispiel eines elektromotorischen Möbelantriebs;

Figur 8

einen Möbelantrieb eines vierten Beispiels in Seitenansicht;

Figur 9-10

eine Variante des vierten Beispiels des Möbelantriebs nach Figur 8 in zwei Endstellungen;

Figur 11

zwei Möbelantriebe in Seitenansicht eines fünften Beispiels;

Figur 12

zwei Möbelantriebe in Perspektivansicht eines sechsten Beispiels;

Figur 13

ein weiteres Beispiel eines Funktionsbeschlags nach dem dritten Beispiel des elektromotorischen Möbelantriebs nach Figur 6 und 7;

Figur 14

ein weiteres Beispiel eines Funktionsbeschlags nach dem sechsten Beispiel des elektromotorischen Möbelantriebs nach Figur 12;

Figur 15-16

einen Möbelantrieb nach einem siebenten Beispiel in Schnittdarstellung von der Seite in zwei Endstellungen;

Figuren 17-19

einen Möbelantrieb nach einem achten Beispiel in verschiedenen Schnittdarstellungen und Ansichten; und

Figur 20

einen Möbelantrieb nach einem erfindungsgemäßen Ausführungsbeispiel.

The invention is explained in more detail with reference to the accompanying drawings. Show it:

Figure 1

a schematic perspective view of a first example of a piece of furniture in the form of a bed with a first example of a functional fitting and an electromotive furniture drive in the form of a double drive;

Figure 2

a side view of a second example of a piece of furniture in the form of a slatted frame with a frame;

Figure 3

a side view of a variant of the second example according to Figure 2 ;

Figure 4

a side view of a slatted frame with a second example of an electromotive furniture drive;

Figure 5

a variant according to the example Figure 4 ;

Figure 6-7

Sectional views of a slatted frame with a third example of an electromotive furniture drive;

Figure 8

a furniture drive of a fourth example in side view;

Figure 9-10

a variant of the fourth example of the furniture drive according to Figure 8 in two end positions;

Figure 11

two furniture drives in side view of a fifth example;

Figure 12

two furniture drives in perspective view of a sixth example;

Figure 13

Another example of a functional fitting according to the third example of the electromotive furniture drive Figure 6 and 7th ;

Figure 14

Another example of a functional fitting according to the sixth example of the electromotive furniture drive Figure 12 ;

Figure 15-16

a furniture drive according to a seventh example in a sectional view from the side in two end positions;

Figures 17-19

a furniture drive according to an eighth example in various sectional representations and views; and

Figure 20

a furniture drive according to an embodiment of the invention.

Figure 1 shows a schematic perspective view of a first example of a piece of furniture 1 in the form of a bed with a first example of a functional fitting 4 and an electromotive furniture drive 3 in the form of a double drive.

The furniture 1 is designed as a slatted frame 2 or a bed as a reclining furniture and in this example comprises a seat part 2a, a back part 2b, a leg or foot part 2c and a neck support 2d, which the support surfaces of a mattress or the support surfaces of an upholstery form. These support surfaces are adjustable in such a way that the back part 2b about a back part axis 2f (see Fig. 2 ) and the leg or foot part 2c about a leg part axis 2g (see Fig. 2 ) are pivotable and can assume different positions. Figure 1 shows these support surfaces in an adjusted position, which can be called the reading position, for example.

Furthermore, the furniture 1 has a functional fitting 4 and / or the electromotive furniture drive 3, the functional fitting 4 and / or the furniture drive 3 being inserted into the silhouette or contour of the furniture 1 in an inventive manner are. An embodiment according to the following figure descriptions is possible as a functional fitting.

A manual remote control for operating the furniture 1 is provided, which in this embodiment e.g. is wirelessly designed as a radio remote control. The handheld remote control and an associated radio receiver and a controller with a power supply are not shown here. Alternatively, a smartphone is designed as a handheld remote control and is connected to the receiver via Bluetooth.

According to another form not shown in detail, the manual remote control can also be designed as a cable manual switch. The cable hand switch can be connected to an associated controller. Alternatively, the switching contacts of the buttons of the manual cable switch are provided for direct switching of the motor current of one or more motors of the furniture drive 3. In any case, however, a motor is provided which can be operated with a low voltage, for example a protective low voltage of less than 30V.

The functional fitting 4 is attached to the electromotive furniture drive 3 in a frame 5. An embodiment according to the following description of the figures can be used as the electromotive furniture drive 3.

The example of a piece of furniture according to Figure 1 can be equipped with any of the designs of an electromotive furniture drive 3 or a functional fitting 4, as will be described in more detail in the following figures.

Stand-up feet are not shown. These can be used when the basic frame of the example of the Figure 1 is made somewhat more massive, so that a bed is thereby formed.

The Figure 2 shows a side view of a further example, the electromotive furniture drive 3 with a drive unit of the slatted frame 2 having a spindle lifting thread 6, 6 ″ for generating a linear adjusting force.

The linear adjustment force acts on two pivot levers 7, 7 ', which have a common pivot point in the back part axis 2f, but are offset from one another at an angle about this back part axis 2f, so that when actuated, first the first pivot lever 7 and then the second Swivel lever 7 'moved by an output member 8 of the spindle lifting thread 6 becomes. The first pivot lever 7 is connected to a coupling member 4a, for example a rod or a rod, the connection point of the coupling member 4a being arranged on the pivot lever 7 at a distance from the pivot center point around the back part axis 2f, which is adjusted to a hinge 2e of the Neck support 2d transfers eccentrically, so that the neck support 2d is thereby pivoted about a pivot axis of the hinge 2e. Since the first pivot lever 7 is moved first, the neck rest 2d, coming from the basic position of the slatted frame 2, is advanced and first actuated. Only after a predetermined linear adjustment path of the spindle lifting thread 6 is the back part 2b pivoted further about the back part axis 2f together with the neck support 2d.

It should also be mentioned that each pivot lever 7, 7 'has a first end area with a pivot point about the back part axis 2f, about which it is pivotably mounted, and has a second end area designed as a free end, which connects to the associated output member 8 of the spindle lifting thread 6 is in operative connection.

Thus, the back part 2b and rod 4a with the neck support 2d hinged to it are moved one after the other by a common output member 8 of the spindle lifting thread 6, because there is a greater distance between the contact points of the pivoting lever 7 'and the output element of the spindle lifting thread 6 when the neck support 2d is in the lowered basic position , while the distance between the contact points of the pivot lever 7 and the output member 8 of the Spindelhubgewindes 6 is only small. As an alternative to the aforementioned angular offset of the pivot levers 7, 7 ', a stepped offset of the contact surface of the output member 8 of the spindle lifting thread 6 with the respective pivot lever 7, 7' can be provided, so that two contact surfaces arranged in staggered offset to one another for contacting the respective pivot lever 7, 7 'are provided.

A further spindle lifting thread 6 "is provided with an associated further output member 8", the further output member 8 "cooperating with a further pivot lever 7" for adjusting the leg part 2c.

Each spindle lifting thread 6, 6 "is moved by an electric motor. Alternatively, two spindle lifting threads 6, 6" are coupled to one another and can be moved together by an electric motor. In any case, it is done the movement of the screw jack thread 6, 6 ″ as a rotating movement via a speed reduction gear coming from an electric motor.

Furthermore, at least one of the screw jack threads 6, 6 ″ is arranged in a housing. The components of the screw jack screw threads 6, 6 ″ are rotatably or displaceably mounted in the housing. The respective linearly movable output member 8, 8 ″, which is coupled to the pivot lever 7 and 7 ′; 7 ″, is also mounted on the housing. According to one embodiment, the pivot lever 7, 7 ', 7 "is also mounted on the housing. Alternatively, the pivot lever 7, 7, 7" has a different mounting if it is attached to a shaft of the functional fitting 4 and the shaft is attached to a bearing, which is attached to a furniture component, is pivotably mounted.

The linearly movable output member 8, 8 "of the Spindelhubgewindes 6, 6" experiences its linear movement by converting the rotational movement of a threaded section of the Spindelhubgewindes 6, 6 "into the linear movement along the central longitudinal axis of the rotational movement. Preferably, a threaded spindle of the Spindelhubgewindes 6, 6 "their rotational movement through a speed reducing gear, the threads of the threaded spindle engaging a non-rotatably mounted threaded nut of the respective output member 8, 8". Alternatively, a gear wheel of the speed reducing gear with a central threaded hole running along the axis of rotation with a nut thread provided, the thread of a non-rotatably mounted threaded spindle is connected to the threads of the nut thread and the threaded spindle with the respective output member 8, 8 ″ of the spindle lifting thread 6, 6 ″ performs the linear output movement.

Furthermore, each housing of the electromotive furniture drive 3 can consist of a plastic and can be firmly connected to a furniture component, as is the case, for example Figure 13 illustrated. Alternatively, the housing of the electromotive furniture drive 3 can be attached to a shaft to which the respective pivot lever 7, 7 ', 7 "is attached, as is the case, for example Figure 14 illustrated.

According to Figure 2 Furthermore, the pivot lever 7 'is firmly connected to the back part 2b, so that the back part 2b and pivot lever 7, 7' have a common pivot point in the form of the back part axis 2f. Alternatively, the back part 2b is connected to the frame 5 directly or via a lever chain and thus articulated and movably connected to the frame 5. Then a lever, not shown in detail, is provided which is connected to the pivot lever 7 'and engages under a support surface or under a spar of the back part 2b in order to be able to move it against gravity.

The same applies to the arrangement of the leg part 2c. According to Figure 2 the pivot lever 7 ″ is firmly connected to the leg part 2c and can be pivoted with it about the leg part axis 2g, alternatively a lever is also provided which is firmly connected to the pivot lever 7 ″ and is in operative connection with the leg part 2c when the Leg part 2c is articulated to a furniture component or to the frame 5.

The Figure 3 differs from Figure 2 and its description in that here the spindle lifting thread cooperating with the back part 2b has the reference number 6 ', that the two spindle lifting threads 6' and 6 "with their associated output members 8 and 8" are shown in a longitudinal section, and that the furniture drive 3 only with the back part 2b and the neck support 2d are shown enlarged. A further embodiment of the coupling member 4a is provided here, the back part 2b and neck support 2d always moving simultaneously and synchronously with one another. It is still different from Figure 2 only one pivot lever 7 is provided. All other features of the Figure 2 are also implemented here and are not listed separately. The Figure 3 thus shows a further embodiment of a coupling member 4 as a rod, which is eccentrically guided with its output end on the hinge 2e of the neck rest 2d. The drive end of the coupling member 4 a is articulated to a non-movable part of the furniture 1 or to a non-movable part of the furniture drive 3.

If the back part 2b is pivoted by the spindle lifting thread 6 ', the pivoting lever 7 moves in such a way that the neck rest 2d is pivoted at the same time because there is a relative movement between the drive end of the coupling member 4a and the non-movable part of the furniture 1 or not movable part of the furniture drive 3 results when the back part 2b is pivoted about the back part axis 2f.

The Figure 4 differs from the previous figures and their descriptions essentially in that the spindle lifting thread 6, 6 'for adjusting the back part 2b and the spindle lifting thread 6 ", 6'" for adjusting the leg part 2c are designed as so-called individual drives, with one spindle lifting thread in each case 6, 6 ', 6 ", 6'" is arranged with the associated motor in a separate housing. All other features mentioned at the beginning of the previous figures, in particular the Figures 2 and 3 , are also implemented here and are not listed separately.

In Figure 4 a side view of a slatted frame 2 with a second or with a further example of an electromotive furniture drive 3 is shown.

The furniture 1 is e.g. a slatted frame 2 or a bed, in which a head part 2b and a leg part 2c are adjusted to a raised position.

According to the Figure 4 , as well as complementary alternatives to Figure 2 and to Figure 3 , two spindle lifting drives 6 ", 6 '" are provided on the leg part side and two spindle lifting drives 6, 6' are provided on the back part side. In each side area of the piece of furniture 1, a spindle lift drive 6, 6 'is provided for the head section / back section and a spindle lift drive 6 ", 6'" is provided on each side for the foot section. Each spindle lifting drive 6, 6 ', 6 ", 6'" can each be operated with an electric motor 3a. It is also possible, as will be shown below (e.g. Figures 6 , 7th , 13th ) that two spindle lift drives 6, 6 are operated by a common electric motor 3a.

The housing of each spindle lifting thread 6, 6 ', 6 ", 6'" is provided with a connection for attachment to a furniture component. In this example, the furniture component is formed by the seat part 2a or by the leg part 2c. Furthermore, the seat part 2a or the leg part 2c can be regarded as a spar member. On every spar link is like it Figure 1 illustrated, the support surface or the elements are arranged for receiving a padding or mattress. Furthermore, a section of the respective housing according to the explanations according to the previous figures, in particular according to the Figures 2 and 3 , also be designed as a spar link. As an alternative to this and for very short spar links, the entire housing of the respective spindle lifting thread 6, 6 ', 6 ", 6'" can be designed as a spar link.

Furthermore, the respective pivot lever 7 ′, 7 ″ is arranged pivotably mounted on the respective housing, one mounting forming the back part axis 2f and the other mounting forming the leg part axis 2g.

A spar member in the form of the back part 2b is connected to the pivot lever 7 '. For this purpose, the pivot lever 7 'is provided with a handle mount 70, which is designed as an insertion pocket or as a recess for receiving a spar of the back part. Analogously to this, the pivot lever 7 ″ is also provided with a spar receptacle 70 of the type mentioned at the beginning, this being connected to a spar member in the form of the seat part 2a. The seat part 2a is permanently provided in the frame 5 so that when the electric motor 3a is in operation the associated Housing of the spindle lifting thread 6 ", 6 '" executes the adjustment or pivoting movement together with the leg part 2c.

The spar receptacle 70 is in the designs after Figure 4 pivotably mounted on the housings of the screw jack threads 6, 6 ', 6 ", 6'". In an alternative compact design of the spar receptacle 70, it has two sections, one section being designed as a pivot lever 7 ', 7 "or acting as a pivot lever 7', 7". The other section of the spar mount 70 is designed as a spar mount 70 itself and takes the spar, for example the back part 2b designed as a spar, the neck support 2d designed as a spar, the seat part 2a designed as a spar, the leg part 2c designed as a spar, the spar Lower leg part 9a. Both sections are formed from a one-piece molded part. One could also say that the pivot lever 7 ', 7 "is designed as an integral part of the spar receptacle 70. Alternatively, the pivot lever 7', 7" is designed completely or at least in sections as a pivot lever 7 ', 7 "and connected to the spar receptacle 70.

In a further embodiment not shown in detail, an electric motor 3 a with only one spindle lifting thread 6 is provided on the head part side. A second spindle lifting drive 6 ″ is provided with a second electric motor 3 a for moving the leg part side of the furniture 1.

The Figure 5 differs from the Figure 4 in that the housing of the spindle lifting thread 6, 6 'of the back part 2b executes the adjustment movement of the back part 2b, and that the housings of all spindle lifting threads 6, 6', 6 ", 6 '" each form a spar member, and that on each housing two spar receptacles 70 are pivotably arranged. All other features of the previous figures mentioned at the beginning are also implemented here and are not listed separately.

The Figure 5 shows a side view of a slatted frame 2 or a bed with movably mounted components and four spindle lifting threads 6, 6 ', 6 ", 6'", each with a linearly displaceable output member 8, 8 ', 8 ", 8'" per spindle lifting thread 6, 6 ', 6 ", 6"'. The output members 8, 8 'of the screw jack thread 6, 6' on the head part move in opposite directions (Threads have unequal pitch direction) and each act on a pivot lever 7 'and 7'". The output members 8", 8 '"of the spindle lifting thread 6", 6'"on the leg part side move in the same direction (threads have the same pitch direction), and while a thigh part 9 lifts, a lower leg part 9a moves back in a knee joint 9b. The pivot levers 7 ', 7 ", 7'", 7 "" are also attached to the bar mounts 70 or alternatively form an integral part of the respective bar mount 70.

The Figure 6 and differs from all the other figures and their descriptions essentially in that a motor unit 12 extends essentially within the frame 5, in particular extends from one inside of the frame to the other inside of the frame 5, and that it extends around is a unit. The Figure 7 differs from the Figure 6 in that three structural units are present here, which, as will be explained in more detail, form an overall structural unit in the form of the motor unit 12 according to FIG Figure 6 is composed. All other features of the previous figures mentioned at the beginning, as well as features of the figures below, are also implemented here and are not listed separately

Figure 6 and 7th show sectional views of a slatted frame 2 with a third or with a further example of an electromotive furniture drive 3.

The Figure 6 shows, in cross section, parts of a piece of furniture 1 designed as a slatted frame 2 with a furniture drive 3 looking in the longitudinal direction of the slatted frame 2. The slatted frame 2 has a frame 5 (see also FIG Fig. 1 ). A spindle lifting thread 6, 6 ′ is arranged on each side of the frame 5 and is arranged on an inside of a longitudinal beam of the frame 5 and / or in a longitudinal beam of the frame 5. The electric motor 3a has two drive shafts 3b, 3b ', which transmit the rotary movement of the electric motor 3a via a flexible shaft 10, 10' each to a worm 11a, 11a 'of a worm gear 11, 11' of a respective spindle lifting thread 6, 6 ' the flexible shaft 10, 10 'is designed as a multi-layer stranding and also includes a support device. In one embodiment, the support device is designed as a flexible, non-rotatably fixed protective jacket, which at least in sections leads with at least one section around the rotating part of the flexible shaft 10, 10 'located therein. Alternatively, the protective jacket is designed as a continuous hose made of plastic. Since the speed of rotation of the flexible shaft 10, 10 'is very high, means for noise reduction are provided. These are in the gap between the rotating part of the flexible shaft 10, 10 'and the support device or the protective jacket, so that there is complete freedom from play between the rotating part and the non-rotating part of the flexible shaft 10, 10'. In one embodiment of the means for noise reduction, so-called flocking is provided for this purpose, which is firmly connected to the rotating part of the flexible shaft 10, 10 '. Another embodiment provides plastic bushings which are provided as a means for reducing noise.

A spindle lifting thread 6, 6 ', which is coupled to a respective worm wheel 11c, 11c', for generating a linear adjustment force which, according to the figure, is perpendicular to the viewing plane, is not shown in detail. The worm wheel 11c, 11c 'forms the gear wheel mentioned at the outset, which is connected to a threaded spindle of the spindle lifting thread 6, 6'. The functional fitting 4 and / or the support surfaces 2a-d, which is / are coupled at least to the back part 2b, is / are not shown in more detail here.

Furthermore, the electric motor 3a is arranged in a tube or a tube which extends in the transverse direction of the slatted frame. The respective end of the tube is adjacent to a housing of the spindle lifting thread 6, 6 'and is firmly connected to it. Furthermore, the central longitudinal axes of the screws 11a, 11a 'are not aligned with the central longitudinal axis of the electric motor 3a. According to the invention, a height offset is formed here, the electric motor 3a being offset upwards in relation to the regular installation shape of the slatted frame 2 or of the furniture 1 in order to reduce the overall height of the slatted frame 2. Furthermore, the motor unit can be combined into a preassembled structural unit, as can be seen from an example according to FIG Figure 13 will be explained in more detail. Such a structural unit of a motor unit together with the spindle lifting threads 6, 6 ′ is designed to be inserted into a preassembled piece of furniture 1 or a preassembled slatted frame 2. Alternatively, the furniture 1 or the slatted frame 2 can be mounted around the compact structural unit of the motor unit 12 so that a fused unit with the furniture 1 is created.

Furthermore, this embodiment contributes in an inventive way to a width variability of the furniture 1 or the slatted frame 2. The production of furniture 1 and slatted frames 2 in different widths is an important market requirement. On the part of the electromotive furniture drive 3, according to the invention, only two, at most only three, components are required for this purpose. The length of the tube can be freely determined from a piece of goods and cut to length accordingly. Thus, any width of the motor unit 12 and thus any width of the slatted frame 2 can be produced. The same applies to the flexible shaft 10, 10 ', since it can also be produced as a section from a piece of goods. If the electric motor is arranged halfway along the length of the tube, both flexible shafts 10, 10 'are of the same length. Furthermore, a connection cable, not shown in detail, leads to the electric motor 3a, which can run through the tube and can also be freely cut to length from a piece of goods by the meter.

The purposes of the motor unit 12 are also mentioned. In one embodiment, the motor unit 12 is intended for adjusting the back part 2b. Alternatively, the motor unit 12 or another motor unit 12 with a different set adjustment path can be intended for adjusting the leg part 2c. According to these two embodiments, two spindle lifting threads 6, 6 'are assigned to an electric motor 3a.

In another embodiment, two flexible shafts 10, 10 'with two worm gears 11, 11' and two special types of spindle lifting threads 6, 6 'are assigned to the single electric motor 3a, with each spindle lifting thread 6, 6' being assigned two threaded spindles, and with each threaded spindle is assigned an output member 8, 8 ', 8 ", 8'". Each output member 8, 8 ', 8 ", 8'" of a spindle lifting thread 6, 6 'acts on the free end of a pivot lever 7, 7', 7 ", 7 '", 7 "". An example to be assigned illustrates the Figure 20 , the pivot levers 7 '", 7""are shown and the detailed structure will be explained.

The Figure 7 shows the embodiment according to Figure 6 . However, it is clearly illustrated that the linear drive units 21, 21 '(see Figure 13 ) with the spindle lifting threads 6, 6 'and the central motor unit 12 with a slatted frame assembly 13 each form a preassembled structural unit, so that the assembly of the furniture 1 is simplified.

The worms 11a, 11a are rotatably and pluggably connected to the respective couplings 10a, 10a 'of the ends of the flexible shafts 10, 10' via worm couplings 11c, 11c '.

The motor unit 12 is pluggably connected to the side parts of the slatted frame 2, in which the drive units with the spindle lifting threads 6, 6 'are arranged, via mutually corresponding connecting sections 12a, 12a', 12a ", 12a '". Similarly, the slatted frame unit 13 is with side parts of the slatted frame 2 can be plugged in via connecting sections 13a, 13a ', 13a ", 13a'", which results in simple assembly.

An alternative embodiment of the Figure 7 differs from all other figures and their descriptions, but in particular compared to Figure 6, essentially in that the one electromotive furniture drive 3 is now designed as a multi-part electromotive furniture drive 3, with a motor unit 12 configured to be connectable with two spindle lifting threads 6, 6 ' is. All other features of the previous figures mentioned at the beginning, as well as features of the figures below, are also implemented here and are not listed separately

Before and after, the motor unit 12 extends essentially within the frame 5. This extension takes place in particular from the one inside of the frame 5 up to the other inside of the frame 5. According to the illustration in FIG Figure 7 the motor unit 12 consists of three structural units, which are drawn apart and shown in a non-assembled state. The motor unit 12 comprises according to FIG Figure 7 essentially the electric motor 3a, the flexible shafts 10, 10 ', a coupling 10a, 10a' at a respective free end of the respective flexible shaft 10, 10 'and a housing in the form of a tube. The housing has two end areas, each of which is designed as a connecting section 12a, 12a ". These connecting sections 12a, 12a" correspond to connecting sections 12a ', 12a'"of the respective housing of the respective spindle lifting thread 6, 6 '. In a manner not shown in detail has at least one connecting section 12a, 12a ', 12a ", 12a'" via an electrical plug connection consisting of a plug and the corresponding counterpart, for example in the form of a plug socket or as spring tongues.

The Figure 8 shows a furniture drive 3 of a fourth or alternative example in side view, which according to the illustration is designed as a so-called single-motor single drive and with a C-shaped closure element 14 of an output opening 15, into which a component of the slatted frame 2 or a functional fitting 4 with the pivot lever 7, 7 ', 7 ", 7'", 7 "" can be used to interact with the output member 8, 8 ', 8 ", 8'". A spindle lifting thread 6, 6 ', which is operated by the electric motor 3a and has the output member 8, 8', 8 ", 8 '", is not shown in detail here.

The Figures 9 and 10 differ from all other figures and their descriptions essentially in that the output member 8 of the spindle lifting thread 6 is indirectly in operative connection with the pivot lever. All other features of the previous figures mentioned at the beginning, as well as features of the figures below, are also implemented here and are not listed separately

Figures 9 and 10 show a variant of the fourth example of the furniture drive 3, in particular according to Figure 8 or one or more of the other figures, in two end positions, where in Figure 9 a starting position and in Figure 10 an extended position are shown. The starting position can also be understood as the starting position, as explained in more detail at the beginning, in which all the support surfaces of the furniture 1 or the slatted frame 2 are in one plane and all the support parts, such as the back part 2b and leg part 2c in particular, are completely lowered.

The Figures 9 and 10 each show a sectional view of a furniture drive 3 with a spindle lifting thread 6 and a linear output member 8 which acts on at least one coupling member 17, for example a ball. The coupling members 17 are movably guided here in a guide contour 16a of a housing 16 of the furniture drive 3 between the output member 8 and a pressure piece 7a of the pivoting lever 7. In a manner not shown in detail, a spindle lifting thread 6, already described above, is also provided here, which moves the output member 8 linearly.

In an inventive way, the overall height H of the housing 16 is reduced in that the articulation and adjustment lever or pivot lever 7, which forms a common output element of the pivot furniture drive 3, is inclined in the basic position, contrary to the statements of the prior art. Prior art arrangements either have short pivoting levers 7, which leads to very high adjusting forces of the spindle lifting thread, or longer pivoting levers which protrude downward. A long pivoting lever 7 is used here, whereby the low adjustment forces of the spindle lifting thread 6 can be used to generate a high torque of more than 450 Nm on the pivoting lever 7 by providing coupling links 17 in the form of deflection elements or in the manner of a push chain for the transmission of compressive forces are.

As in the Figures 9 and 10 As can be seen, the linearly displaceable output member 8 moves horizontally, while the free end of the pivot lever 7 moves on a circular path with an essentially vertical chord. Furthermore, the guide contour 16a can be designed as a channel-like recess in the housing 16 of the electromotive furniture drive 3. Alternatively, the guide contour 16a is raised. The coupling members 17 can be designed as balls or rollers which are individually and loosely guided through the guide contour 16a. Alternatively, the coupling links 17 are connected to one another to form a chain. Furthermore, viewed in section, they can be elongated and can be concave and / or convex in the respective end region. In the case of the one end region that is concave, the other end region is convex. In the event that both end regions are concave or convex, a coupling member, not shown in detail, is provided between such coupling members 17, which is formed corresponding to the respective concave or convex end region in order to link them to one another.

The ones in the Figures 9 and 10 Coupling links 17 shown are in frictional connection with the guide contour. Alternatively, coupling members 17 are provided which are mounted rotatably relative to one another and roll or roll along the guide contour 16a. Such coupling links 17 are advantageously connected to one another in the manner of a chain.

The Figure 11 differs from all other figures and their descriptions essentially in that two individual furniture drives 3 are connected to one another in a first special way. All other features of the previous figures mentioned at the beginning, as well as features of the figures below, are also implemented here and are not listed separately.

The Figure 11 shows two furniture drives 3, each with an electric motor 3 a in a side view of a fifth example, which are connected to one another by means of a connecting element 18. In a preferred embodiment, the connecting element 18 is designed as a rigid profile and is inserted lengthwise into both housings 16 of the furniture drives 3. In an inventive way, the connecting element 18 can be cut to the desired length, so that any desired center distance of the pivot shafts 19 of the pivot axes can be generated in the simplest manner.

The connecting element 18 is inserted into a recess of the respective furniture drive 3. The fixation takes place by a clamping mechanism not shown in detail, alternatively by a clamping screw. Another fixation by clamping can take place during the assembly of the furniture drives 3 together with the connecting element 18 if the housing 16 of each furniture drive 3 firmly clamps the connecting element 18 when the housing parts of the housing 16 are screwed together. Other fixations can be formed by a latching mechanism, which is not shown in detail here. Furthermore, the insertion depth of the connecting element 18 into each furniture drive 3 is at least twice the height of the connecting element 18.

Furthermore, the Figure 11 fork-like U-shaped locking elements 14, which can be fixedly but rotatably connected to the respective housing 16 for locking the pivot shaft 19.

The Figure 12 differs from all other figures and their descriptions essentially in that two individual furniture drives 3 are connected to one another in a further special way. All other features of the previous figures mentioned at the beginning, as well as features of the figures below, are also implemented here and are not listed separately.

The Figure 12 shows in an alternative way a connection unit 20 of two furniture drives 3 of a sixth or a further example. The connection unit 20 is designed as a multi-part connection unit 20. Here it comprises two shell halves 20a, each with a plate 20c, the upper and lower edges of which are each provided with holding surfaces 20d which are parallel to one another and which extend at right angles to the plate 20c. The inner sides of the holding surfaces 20d are provided with opposing holding sections 20b, with FIG Figure 12 the lower holding surfaces 20d have ribs 20e to increase the stability between the holding sections 20b.

The holding sections 20b of the connecting units 20 here comprise a number of webs 200 which are attached to the inner sides of the holding surfaces 20d transversely to the longitudinal direction of the plates 20c. Each web 200 has a cross web 201 on its free side, which extends over the entire web length. The shape of the web 200 and the transverse web 201 form a type of T-beam for T-slot connections. The webs 200 are arranged parallel to one another and each define an intermediate space 202 between them.

At the opposite end sections of the housing 16, holding sections 20b 'are also formed on the top and bottom of the housing 16, which correspond in shape to the holding sections 20 of the connecting units 20. Thus, the holding portions 20b 'of the housing 16 each comprise molded-in webs 210 with transverse webs 211. The webs 210 extend transversely to a longitudinal direction of the respective housing 16, parallel to one another and define T-shaped spaces 212 between them, e.g. those for T-slot connections.

In order to connect the housings 16 to one another, both shell halves 20a are now pushed onto the respective housing 16 of the respective furniture drive 3 in a form-fitting manner from both longitudinal sides of the housing 16 parallel to the central longitudinal axis of the pivot axes 19a. The holding sections 20b come into positive engagement with the holding sections 20b 'of the respective housing 16, which correspond to them. The webs 200 of the connecting unit 20 with the transverse webs 201 are received in the T-shaped interspaces 212, and the webs 210 of the housing 16 with the transverse webs 211 are arranged in the interspaces 202.

The housing 16 of the furniture drives 3 and the connecting unit 20 are molded from a plastic. Combinations of different materials can of course also be possible. Here, the force is transmitted from the housing 16 of the furniture drive 3 to the connection unit 20 through the positive connection of the holding sections 20b 'of the housing 16 and the holding sections 20b of the connecting unit 20 and vice versa.

The holding sections 20b of the connecting unit 20 and the holding sections 20b 'of the housing 16 are in a form-fitting connection with one another after assembly. They are designed in the manner of a toothing, but can also have other geometries. As a result, the housing 3 can be connected to one another very easily and at the same time very robustly. The toothing is designed in the manner of a hook toothing, alternatively in the manner of the T-groove toothing and alternatively similar to a dovetail connection. The structural unit created after the assembly of the furniture drives 3 with the connection unit 20 can take up the bending forces arising in the operating state of regular operation by means of this special connection toothing. The bending forces are due to the output torque of the pivoting shafts, which are mounted pivoting about the respective pivot axis 19a.

There is another difference between the statements of Figure 11 and the Figure 12 called. While after Figure 11 the element connecting the furniture drives 3 in the form of the connecting element 18 transmits the connecting forces to the inside, that is to say to the insertion pockets, of the housing of the furniture drives 3 Figure 12 through the element connecting the furniture drives 3 in the form of the connecting unit 20, the connecting forces are transmitted to the outside of the housing of the furniture drives 3.

Further special features of the connection unit 20 should also be mentioned, in particular if it is manufactured as a plastic injection-molded part. The connecting unit 20 has a fixed overall length. Since it is very simple and the holding sections 20b are always designed to be constant, the production of injection molding tools of other connection units 20 with a different overall length is also very simple. It is then possible, while maintaining identical furniture drives 3, to generate individual center distances of the pivot axes 19a if the corresponding overall length of the connecting unit 20 is used. Furthermore, the connection unit 20 is designed like a shell and forms a type of envelope housing after assembly. In the interior of this enveloping casing, electrical components such as mains-operated power supplies, radio receivers, relay controls and others can also be arranged, which is shown in the illustration of Figure 12 not shown, but imaginable. In order to accommodate and connect such electrical components, the connection unit 20 has holders for these on the inside, as well as openings in the outer wall for passing cables and / or plug-in connections through. In each case of the electrical components used, the furniture drives 3 remain unchanged.

The Figure 13 can be used as an alternative to the implementation according to Figures 6 and 7th be understood. Figure 14 differs from this, as will be described in more detail, and can be used as an alternative to one of the versions of Figures 8 to 12 be understood. All other features of the previous figures mentioned at the beginning, as well as features of the figures below, are also implemented here and are not listed separately.

The Figure 13 shows another example of a functional fitting 4 according to the third or according to a further example of the electromotive furniture drive 3 according to Figure 6 and 7th as a preassembled unit with a two-motor furniture drive 3. The functional fitting 4 is intended for use in a piece of furniture 1.

The furniture 1 is an independent unit as a whole without the unit shown and can in principle be used in its basic position.

Furniture drive 3 and functional fitting 4 form a compact unit here, as it were, because output levers 40 of functional fitting 4, which are coupled at least to the back part 2b or to the leg part 2c, are connected to the housing of the furniture drive 3 or are articulated to it this compact unit of furniture drive 3 and functional fitting 4 forms a functional system and is designed to be connectable to furniture 1. Typically, the connection to the piece of furniture 1 takes place on the inside of the frame 5 (see FIG Fig. 1 ).

In a manner not shown in greater detail, the connecting pipes each have an electric motor 3a as motor unit 12 and are designed to be freely adjustable in length so that the pre-assembled unit can be adapted very easily for different widths of a piece of furniture 1. It is also conceivable that a common connecting pipe is provided as the motor unit 12 with two or more electric motors 3a. It can then be an oval-shaped tube, seen in cross section, which extends at least along the length of the motors. Of course, other cross-sections are also possible.

The drive units 21, 21 'can be clearly seen here, which were described above in connection with Figure 5 and 6th are already described. The spindle lifting threads 6, 6 ', 6 ", 6"', 6a, 6b are received by the housing of the drive unit 21, 21 'in a manner not shown. A mounting unit 22, 22 'for attaching a frame 5 or slatted frame 2 is fastened to the outer sides of the drive units 21, 21'. Alternatively, the assembly unit 22, 22 'each forms a one-piece molded part with the housing of the drive unit 21, 21'. The height of the assembly unit 22, 22 ', measured from the lower edge of the furniture 1 or the slatted frame 2, extends upwards to the nearest structural boundary of the furniture 1 or the slatted frame 2, which, for example, by the bearings and recordings of the slats or other support elements for receiving a padding or a mattress are defined. The overall height of the respective assembly unit 22, 22 'is less than the overall height of the respective drive unit 21, 21'. Furthermore, several assembly units 22, 22 'can be used per drive unit 21, 21'. The assembly unit 22, 22 'also has the task of arranging the respective drive unit 21, 21' at a distance from the frame and of transmitting the supporting forces from the housing of the drive unit 21, 21 'to the frame 5.

Another example of a functional fitting 4 according to the sixth or according to a further example of the electromotive furniture drive 3 in particular according to Figure 12 is in Figure 14 shown. Another preassembled unit consists of a two-motor furniture drive 3 in a housing 16 with pivot shafts 19, which on the outside have a polygonal tube 19b, according to the illustration, a square. It is also possible that the pivot shafts 19 themselves have a polygonal cross section without being encased by a tube. Furthermore, they can have a section which is designed in the manner of an outer polygon. Alternatively, the pivot shaft is provided on the outside with a projecting driver.

According to this embodiment, the respective output member as output lever 40 of the furniture drive 3 is pivotably mounted relative to the housing 16 and has an inner profile which corresponds circumferentially to the outer profile of the pivot shaft 19 or the polygonal tube 19b and is thus in a rotationally fixed connection therewith. The pivot shaft 19 or the polygonal tube 19b is supported by end shields 19c which are rotatably mounted on the respective free end of the pivot shaft 19 or the polygonal tube 19b. The end shields 19c themselves are connected to the frame 5 of the furniture 1 or the slatted frame 2, which is not shown in detail here for the sake of simplicity.

In a manner not shown in detail, the swivel shafts are designed to be freely cut to length, so that the preassembled unit can be adapted very easily for different widths of a piece of furniture 1.

The Figures 15 and 16 can also be used as an alternative or as a further development, in particular according to the feature of a furniture drive 3 with a device as already described above in Figure 14 described outside polygon are understood. All other features of the previous figures mentioned at the beginning, as well as features of the figures below, are also implemented here and are not listed separately.

Figures 15 and 16 show a furniture drive 3 in a sectional view according to a seventh or according to a further example from the side in two end positions. A spindle lifting thread 6 is shown with a linear output member 8, which acts on a connecting rod 23 which is articulated to the free end of a linkage lever 24 in a pivot axis 24a. The connecting rod 23 functions here as a deflecting element. It can also be designed as a coupling member 17. Furthermore, according to this embodiment, the articulation lever 24 is a component of the furniture drive 3 and has a pocket 25 for coupling the pivot shaft 19. For this purpose, the pivot shaft 19 has a driver 26 which can be coupled to the pocket 25.

According to the illustration, the cross section of the pivot shaft 19 is circular. The driver 26 is non-rotatably connected to the pivot shaft 19 and is elongated. Another not shown driver 26 is short and designed as a projecting driver 26 as above and in Figure 14 already mentioned firmly connected to the pivot shaft 19. According to the representations of Figures 15 and 16 are shown again separately next to the furniture drive 3 to clarify the arrangement of pivot shaft 19 and driver 26. From the Figure 16 also shows the assembly of the pivot shaft 19 with the furniture drive. If the furniture drive 3 according to the Figure 16 is in a basic position, which is referred to here as the assembly position, the pivot shaft 19 together with the driver 26 can be mounted on the furniture drive 3 and removed from it again. For this purpose, the furniture drive 3 and the pivot shaft 19 move relative to one another, specifically in the radial direction of the pivot shaft 19, which is defined at right angles to the central longitudinal axis of the pivot shaft 19. To secure the pivot shaft 19 on the furniture drive 3 or on the articulation lever 24 against unintentional dismantling, securing means are also provided, which will not be explained in more detail here. Such securing means can for example be provided by a closure element 14 according to FIGS Figures 8 to 11 or a closure element 16d according to Figure 17 be trained. Furthermore, the pivot lever 7 according to FIGS Figures 9 and 10 be designed as an articulation lever 24, as described here, if it forms part of the functional system of the pre-assembled furniture drive 3 with the furniture drive 3.

The Figures 17-19 show an eighth or a further example of a furniture drive 3 in a side view, partly in a sectional view, as well as a pivot lever 7 in a non-mounted and in a mounted position. All other features of the previous figures mentioned at the beginning, as well as features of the figures below, are here in the Figures 17 to 19 also realized and are not listed separately. The pivot lever 24 or the pivot lever 7 is an integral part of the functional fitting 4 and has a pivot axis 19a which is fixedly but pivotably mounted in a recess as the output opening 15 of the furniture drive 3. Furthermore, the free end of the pivot lever 7 a pressure piece 7a. In this embodiment, the pressure piece 7a is designed as a round body axially parallel to the pivot axis 19a.

The width of the pressure piece 7a in the direction of the pivot axis 19a is greater than a width of the pivot lever 7 in the direction of the pivot axis 19a, so that the pressure piece 7a protrudes at least on one side of the pivot lever 7 in the direction of the pivot axis 19a. The linear adjustment element as the drive element 8 of the spindle lifting thread 6 acts on the pressure piece 7a, so that the eccentric force on the pivot axis 19a generates a torque which is transmitted to the functional fitting 4 in a manner not shown here. The functional fitting 4 is in mechanical operative connection with the pivot shaft 19.

The special feature of this embodiment is that the pressure piece 7a is guided lengthways (ie in the direction of the pivot axis 19a) in circular arc-shaped slots / pockets or pivoting contours 16c of the housing 16, the center of each circular arc of the pivoting contours 16c being in the central longitudinal axis of the pivoting axis 19a lies. According to the invention, the pivot lever 7 is inevitably guided within the housing 16 in such a way that a closure element 14 or 16d can be omitted, which fixes the pivot axis 19 in the recess 15 of the housing 16 in a rotatable manner. The thrust piece 7a is guided in the housing by the above-mentioned lateral protrusion of the thrust piece 7a being guided in the circular arc-shaped pocket 16c, as is done in the following Figures 18 and 19th explain in more detail.

Here, the closure element 16d is shown in a variant. The Figure 17 shows the closure element 14 in a non-mounted position above the furniture drive 3. The closure element 14 here has a fork-shaped design with an opening and is thus placed on the pivot shaft 19 mounted on the furniture drive 3. The fork-shaped opening of the closure element 14 shows how it is Figure 17 disclosed in the direction of the furniture drive 3. Finally, the closure element 14 is rotated about the central longitudinal axis of the pivot shaft, that is to say about the pivot axis 19a. For this purpose, the closure element 14 has a first form-fitting contour which runs concentrically to the pivot axis 19a. The housing 16 of the furniture drive 3 has a second form-fitting contour in the area of the output opening 15, which also runs concentrically to the pivot axis 19a when the pivot shaft 19 on the furniture drive 3 is in the assembly position. After the closure element 14 has been rotated, the first and second form-fit contours engage form-locking into one another, so that a form-locking connection is formed between the closure element 14 and the housing 16 of the furniture drive 3.

Figure 18 each shows an open housing 16 of the furniture drives 3, so that a view into the interior is possible. In the further embodiment, a straight lead-in contour 16b is also provided, which opens into the pivoting contour 16c. The contours 16b and 16c are arranged opposite one another in each half in the housing 16, which consists of two halves divided in the longitudinal direction.

As already described at the beginning, the lateral protrusion of the pressure piece 7a is guided in the insertion contour 16b and in the pivoting contour 16c. The guidance along the insertion contour 16b takes place exclusively during the assembly or during the dismantling of the pivot shaft 19 together with the pivot lever 7 or articulation lever 24. In the operating state of regular operation or in the operating state of readiness for regular operation, the pressure piece 7a is in the pivoting contour 16c. To ensure that the pressure piece 7a always remains in the pivoting contour 16c in the operating state of regular operation, another embodiment provides a further closure element 16d, which can be introduced into the insertion contour 16b and can be fixed mechanically. The introduction of the further closure element 16d takes place either along the insertion contour 16b or at right angles thereto, coming from the side of the outer wall of the housing 16. Alternatively, the further closure element 16d is movably mounted on the housing 16 and can be moved from a first release position into a second blocking position. In the right half of the picture Figure 18 the further closure element 16d is brought into the blocking position. This results in a closed, channel-like pivoting contour 16c.

Figure 19 shows the pivot shaft 19 or the pivot lever 7 or the articulation lever 24 with attached pressure piece 7a in the mounted position according to the operating state of regular operation. Two end positions of the pivot lever 7 and the linkage lever 24 can be seen.

In another embodiment, no lead-in contour 16b is provided, the pivot lever 7 being a component of the furniture drive 3 and having a profile bore along the central longitudinal axis of the pivot axis 19a for receiving a profile shaft designed as a pivot shaft 19. The profile hole can be as Be square (see e.g. Figure 12 and 14th ). Then the lateral protrusion of the pressure piece 7a can only be in connection with the pivoting contour 16c. The housing 16 also has no drive opening 15. Closure elements 14, 16d can also be saved here. This creates a very compact design of a furniture drive, with the pivot lever 7 with attached pressure piece 7a, as explained in more detail at the beginning, being integrated into the assembly process as a component before the housing 16 of the furniture drive 3 is closed and assembled together.

In another embodiment, the pivot lever 7 can have a pocket instead of the profile bore, which is designed to be coupled to a driver of the pivot shaft 19 (similar to FIG Figure 15-16 ).

In Figure 20 an embodiment of the electromotive furniture drive 3 according to the invention is shown in a plan view of an open drive housing 3b.

An electric motor 3a is provided for adjusting both the back part 2b and the leg part 2c of the furniture 1 (bed or slatted frame 2) (see FIG Figure 1 ). The one electric motor 3 a thus adjusts several furniture components 2 b, 2 c, which are coupled to the electric motor furniture drive 3. This is in Figure 20 indicated by the reference numerals 2b and 2c. For this purpose, several spindle lifting threads 6a, 6b are provided.

In one embodiment, a gear wheel 27, which is connected downstream of the electric motor 3 a, is connected to two threaded spindles 28, which have opposing pitch directions and have a common axis of rotation with the gear wheel 27. The gear wheel 27 is designed as a worm wheel in one embodiment. In one embodiment, a threaded spindle 28 is coupled on both sides of the gear wheel 27. Analogous to the above-mentioned embodiments, the gear wheel 27 or the worm wheel 11b, 11b 'is coupled to two spindle lifting threads 6a, 6b.

In one embodiment, the threaded spindles 28 are rotatably mounted in a stationary bearing. A nut 29 is placed on the threads of each spindle. Each nut 29 is non-rotatable, but designed to be displaceable along its length and guided in the housing 16 of the furniture drive 3. Each nut 29 acts directly or via intermediate links 29a on an adjusting lever or Swivel lever 7 '"7"", which is coupled to the associated furniture component 2b, 2c and / or to a furniture component 2b, 2c to be adjusted.

Thus a head or back part nut 29b is connected to the furniture component for adjusting the back part 2b. A leg part nut 29c is connected to the furniture component of the leg part (and of the foot part) 2c. In one embodiment, the back part nut 29b acts directly on the back part 2b of the furniture 1 and the leg part nut 29c acts on the leg part 2c of the furniture 1 via an intermediate member 29a.

When the motor 3a is operated, the back part nut 29b and leg part nut 29c move in opposite directions to one another. In the basic position of the furniture 1, when all furniture components 2b, 2c are brought back to the starting position by gravity, there is a larger adjustment distance of approx. 10 mm to 50 mm between leg part nut 29b and intermediate member 29a, while a distance between the Back part nut 29b and its associated adjusting or pivoting lever 7 '"is only slight Figure 20 illustrates this basic position.

When the motor 3a is operated in the first direction of rotation to adjust the connected furniture components 2b, 2c from the basic position, only the back and head part 2b is adjusted until the adjustment distance between the leg part nut 29c and the intermediate member 29a has reduced to zero which has the effect that the leg-foot part 2c is then additionally adjusted by the leg part nut 29c and by the intermediate member 29a.

When the motor 3a is operated in the second adjustment direction to adjust the connected furniture components 2b, 2c from the basic position, coupling slides 30 are also provided, which are slidably mounted between the back part nut 29b and the intermediate member 29a.

In this second direction of rotation of the motor 3a, the back part nut 29b moves in the direction of the leg part nut 29c, actuates the coupling slide 30, which transfers the adjustment force generated by the back part nut 29b to the intermediate member 29a, which means that only the leg and foot part 2c as a furniture component is adjusted becomes. In other words, in this second direction of rotation of the motor 3a, the back part nut 29b only actuates the leg and foot part 2c via the interposed links consisting of an intermediate link 29a and a coupling slide 30. For this purpose, guide means such as bars or Recesses for the displaceable guidance of the coupling slide 30 are provided. For example, two opposing coupling slides 30 can be arranged, only one is shown here. In principle, all coupling slides 30 are arranged around the central longitudinal axis of the threaded spindle 28, alternatively arranged circularly symmetrically in order to be able to transfer adjustment forces evenly distributed between the back part nut 29b to the intermediate member 29a.

In one embodiment, the coupling slide 30 is constructed in several parts. A coupling slide 30 can be rod-shaped. A coupling slide 30 can be designed to be spatially shaped. A coupling slide 30 can be constructed in several parts and consist of a number of components in the manner of an assembly. Likewise, the intermediate member 29a can also be put together from a number of components to form an assembly.

According to the Figure 20 the motor 3a is, for example, directly connected to the housing 16 of the furniture drive 3. Alternative connection and coupling forms can be found, for example, in Figures 6 , 7th and 13th again, when a flexible shaft 10, 10 'as a rotation transmission shaft with the motor shaft and with a worm 11a, 11a' is non-rotatably connected, with only the worm 11a, 11a 'then being mounted in the housing of the furniture drive 3 and with the gear wheel 27 in drive connection.

According to the illustration after Figure 20 the pivot levers 7 ′ ″, 7 ″ ″ are pivotably mounted on the housing 16 of the furniture drive 3. Other embodiments of a mounting or mounting of a pivot lever 7 or an articulation lever 24 of the aforementioned figures can also be implemented here Figure 20 is not limited to the illustrated and named embodiment of an arrangement and mounting of the pivot lever 7 '", 7"". Alternatively, the pivot lever 7'", 7 "" can be firmly connected to a pivot shaft 19, a polygonal tube 19b or a furniture component 2b, 2c or alternatively be mechanically coupled. Rather, the features and alternatives of the previous figures should also be implemented here and are not listed separately.

The aforementioned figures show detailed representations. The present invention also includes combinations of individual detailed representations.

The invention is not restricted by the examples described above, but can be modified within the scope of the appended claims.

List of reference symbols

1

Furniture

2

Slatted frame

2a

Seat part

2 B

Back part

2c

Leg part

2d

Neck support

2e

hinge

2f

Back part axis

2g

Leg part axis

3

Furniture drive

3a

Electric motor

3b

Drive housing

4th

Functional fitting

4a

Coupling link

5

frame

6, 6 ', 6 ", 6"', 6a, 6b

Screw jack thread

7, 7 ', 7 ", 7"', 7 ""

Swivel lever

7a

Pressure piece

8, 8 ', 8 ", 8'"

Output link

9

Thigh part

9a

Lower leg part

9b

Knee joint

10, 10 '

Flexible shaft

10a, 10a '

coupling

11, 11 '

Worm gear

11a, 11a '

slug

11b, 11b '

Worm wheel

11c, 11c '

Worm coupling

12

Motor unit

12a, 12a ', 12a ", 12a'"

Connection section

13

Slatted frame assembly

13a, 13a ', 13a ", 13a'"

Connection section

14th

Closure element

15th

Output port

16

casing

16a

Guide contour

16b

Lead-in contour

16c

Swivel contour

16d

Closure element

17th

Coupling link

18th

Connecting element

19th

Swivel shaft

19a

Swivel axis

19b

Polygonal tube

19c

Bearing shield

20th

Connection unit

20a

Shell half

20b, 20b '

Holding section

20c

plate

20d

Holding surface

20e

rib

21, 21 '

Drive unit

22, 22 '

Assembly unit

23

Connecting rod

24

Linkage lever

24a

Swivel axis

25th

bag

26th

Carrier

27

Gear wheel

28

Threaded spindle

29

mother

29a

Intermediate link

29b

Back part nut

29c

Leg part nut

30th

Coupling slide

40

Output lever

70

Spar mount

H

Construction height

Claims (10)

Furniture drive (3) for a piece of furniture (1), in particular seating and reclining furniture such as armchairs, beds and slatted frames (2), having at least one electric motor (3a) and at least two spindle screw threads which interact with the electric motor (3a) via a gear wheel (27) (6a, 6b) for adjusting furniture components (2b, 2c), the at least two spindle lifting threads (6a, 6b) each having a threaded spindle (28) with an opposing pitch direction, the threaded spindles (28) and the gear wheel (27) having a common one Have axis of rotation, and a nut (29) is applied to the thread turns of each threaded spindle (28), which cannot be rotated, but is designed to be longitudinally displaceable and is guided in the housing (16) of the furniture drive (3), each nut (29 ) acts on an adjusting lever or pivot lever (7 '"7"") which is coupled to the furniture component (2b, 2c) to be adjusted
characterized in that
a first of the nuts (29) acts directly on the adjustment lever or pivot lever (7 '"7"") assigned to it and a second of the nuts (29) acts via an intermediate member (29a) on the adjustment lever or pivot lever (7') assigned to it. "7"") acts, with at least one coupling slide (30) being provided, which is arranged displaceably mounted between the first of the nuts (29) and the intermediate member (29a). Furniture drive (3) according to Claim 1, in which the first of the nuts (29) is a head or back part nut (29b) which is provided for connection to the furniture component (2b) for adjusting a back part, and the second of the nuts ( 29) is a leg part nut (29c) which is provided for connection to the furniture component (2c) of a leg part and / or a foot part (2c). Furniture drive (3) according to Claim 2, in which the head or back part nut (29b) and the leg part nut (29c) move in different directions with respect to one another when the electric motor (3a) is in operation. Furniture drive (3) according to claim 3, in which in a first direction of rotation of the electric motor (3a), in which the back part nut (29b) moves from the leg part nut (29c), only the back part and head part (2b) are initially adjusted until the distance between the leg part nut (29c) and the intermediate member (29a) is reduced to zero, after which the leg-foot part is also reduced (2c) is additionally adjusted by the leg part nut (29c) and by the intermediate link (29a). Furniture drive (3) according to claim 3 or 4, in which, in a second direction of rotation of the electric motor (3a), in which the back part nut (29b) moves in the direction of the leg part nut (29c), the coupling slide (30) is driven by the back part nut (29b ) transmits adjustment force generated to the intermediate member (29a), whereby only the leg and foot part as a furniture component (2c) is adjusted. Furniture drive (3) according to one of Claims 1 to 5, in which guide means such as webs or recesses are provided in the housing (16) for the displaceable guidance of the at least one coupling slide (30). Furniture drive (3) according to one of Claims 1 to 6, in which the coupling slide (30) is constructed in several parts. Furniture drive (3) according to one of Claims 1 to 7, in which the coupling slide (30) is arranged parallel to the central longitudinal axis of the threaded spindle (28). Furniture drive (3) according to one of Claims 1 to 8, in which a plurality of coupling slides (30) are provided. Furniture drive (3) according to Claim 9, in which the plurality of coupling slides (30) are arranged circularly symmetrically around the central longitudinal axis of the threaded spindle (28).

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