EP1318737B1 - Furniture drive embodied as a double drive - Google Patents

Abstract

A furniture drive which is embodied as a double drive and used to move parts of a piece of furniture in relation to each other. The furniture drive comprises two drive units, each one having a linearly movable drive element for pivoting a pivot lever which co-operates with a part to be moved of the piece of furniture when the furniture drive is in the assembly position. The linearly movable drive element or an actuating element connected thereto comprises a recess into which the pivot lever projects in the radial direction thereof when the furniture drive is in the assembled position. An inner wall of the recess forms a bearing surface for the pivot lever. The furniture drive has a low overall height and a simple design, and can thus be produced economically.

Description

The invention relates to a double drive trained furniture drive in the preamble of the claim 1 type for adjusting parts of a Furniture relative to each other.

Such furniture drives are well known and serve as adjustment drives for adjusting of parts of a slatted frame relative to each other. By EP 0 372 032 B1 is designed as a double drive Furniture drive for adjusting parts of a Furniture relatively known to each other, the two drive units having. Each drive unit acts in the known furniture drive with a pivot lever together, in the mounting position of the furniture drive with one to adjusting part of the furniture in operative connection stands. In the known furniture drive, each drive unit a linearly movable drive element on, the same with the pivot lever for pivoting is in operative connection. Here is the Swivel lever designed as an angle lever on which the linearly movable drive element that passes through one an adjusting spindle arranged spindle nut formed is, for pivoting the pivot lever a compressive force exerts and so with the pivot lever in operative connection stands.

By DE 38 42 078 C2 is a similar furniture drive known, in which each drive unit also interacts with a pivot lever. In the case of this Publication known furniture drive is the linear movable drive element through a spindle nut formed with a parallel to the spindle axis Holding leg of a right angle formed Schubstücks is connected, the other, vertical to the spindle axis standing pressure leg the free end of the pivot lever applied loosely and so is in operative connection with the pivot lever.

By EP 0 583 660 B1 is a double drive style designed furniture drive to Adjusting parts of a piece of furniture relative to each other known, which has two drive units. Every drive unit This furniture drive has a linear movable drive element in the form of a spindle nut on, for pivoting a in mounting position of the Furniture drive with a part of the furniture to be adjusted in operative connection pivot lever serves. At its the pivot lever facing the end has the spindle nut a perpendicular to the spindle axis Slit on, in which the pivot lever with a arranged at its end, in essence extending parallel to the pivot axis of the pivot lever Pin engages and is guided in this closely.

A disadvantage of this known furniture drive exists in that he is consuming in construction. Furthermore occur in this known furniture drive unbalanced Strains of the pivot lever on, since the force application point of the drive element outside the Longitudinal plane of the pivot lever is located.

Furniture drives for adjusting parts of supporting devices are further by DE 296 07 493, DE 197 18 255 C1, WO 99/27819 and DE 296 03 173 U1.

DE 296 12 493 U1 is a support device the type in question for supporting a padding a sitting and / or lying furniture known, the one Furniture drive for adjusting parts of the support device relative to each other, the furniture drive a linearly movable drive element for pivoting one with a support member to be adjusted the support device in operative connection Has pivot lever. In the known furniture drive the drive element is a rotation and in the axial direction movable on a rotatably driven adjusting spindle held spindle nut, wherein the linearly movable Drive element or a connected to this Actuating element has a recess in the protrudes the pivot lever in its radial direction. An inner wall of the recess forms a contact surface for the pivot lever, wherein the contact surface the Rocker arm applied loosely.

A disadvantage of this known support device is that the used furniture drive relative consuming and therefore expensive to manufacture.

A similar furniture drive is also from the German Patent DE 199 08 083 C1 known with the Effect on the Contracting State of the Federal Republic of Germany (DE) State of the art under Article 54 (3) EPC forms.

The invention is based on the object Supporting device in the preamble of claim 1 specify the type mentioned, the simple in construction and thus inexpensive to produce and is robust.

This object is achieved by the features specified in claim 1 Characteristics solved.

According to the teaching of claim 1, the linear movable drive element or a connected thereto Actuator on a recess in the the pivoting lever, which is usually not part of the furniture drive, but a piece of furniture, for example one Slatted frame is, protruding into the mounting position, wherein an inner wall of the recess a contact surface for forms the pivot lever.

In this way, results in a simpler and thus cost-effective design of the furniture drive according to the invention with relatively few components.

A particular advantage of the furniture drive according to the invention is that the pivot lever is shorter can be designed as in the known furniture drives. In this way, the furniture drive according to the invention designed with a relatively low height become. This has the significant advantage that in combination, for example, a slatted frame with a furniture drive according to the invention so formed Unit has a height that is not or only slightly larger than the height of the slatted frame alone.

Another advantage of the furniture drive according to the invention is that he is robust in construction and to Application of large forces is suitable.

Furthermore, it is advantageous that in the inventive Furniture drive the force application point of the actuator on the pivot lever in its longitudinal center plane can lie, so that an unbalanced load the pivot lever is avoided.

The furniture drive according to the invention is as a double drive educated. Under basic retention However, it is the effect principle according to the invention also possible to design the furniture drive as a single drive.

An extraordinarily advantageous development The teaching of the invention provides that in the contact surface at least one slot for receiving the lever arm the pivot lever in at least one end position the adjusting movement is provided and that the Swivel lever removed from the slot with a plant part abuts against the contact surface. In this embodiment can the pivot lever with its free end protrude deeply into the recess, so that the furniture drive has a particularly low height. While the pivot lever with the plant part on the contact surface is applied, is an undesirable abutment of the lever arm the pivot lever away from the plant part avoided at the contact surface, since this part of the Swing lever is accommodated in the slot. Thus allows this embodiment has a large tilt angle the pivot lever in a very compact at the same time Construction.

A development of the aforementioned embodiment provides that the plant part is essentially extends parallel to the pivot axis of the pivot lever. In this embodiment, the plant part extends with it across the slots, being a safe System is guaranteed at the contact surface.

Another, extremely advantageous development provides that the pivot lever forked with two mutually parallel and spaced lever arms is formed and the plant part between the lever arms the pivot lever is held. This embodiment also allows a large swing angle the swing lever at the same time compact Construction. Due to the spaced lever arms is one with respect to the longitudinal center plane of the pivot lever symmetrical force transmission from the drive element or the actuating element in the pivot lever facilitated. Asymmetrical loads of the pivoting lever, to its deformation and possibly damage could lead, are thus avoided.

A development of the aforementioned embodiment provides that the contact surface on a projection is formed, with the clear width between the lever arms the pivot lever substantially the extent the projection in this direction corresponds or bigger than this one is. In this embodiment lies the pivot lever during the adjustment movement with his Anlageteil on the contact surface, while the Move lever arms laterally along the projection.

Another embodiment of the embodiment with the fork-shaped pivot lever provides that in the Contact surface or in the area of the contact surface two parallel Spaced to the pivot axis of the pivot lever, essentially perpendicular to the pivot axis of Swivel lever extending slots are formed for Recording the spaced lever arms of the pivot lever in an end position of the adjustment. In this embodiment is opposite to the aforementioned embodiment the stability of the part in which the recess is formed, improved.

Basically, it is in the embodiment with the slot sufficient that only in the contact surface at least one slot is formed. A functional one However, further development provides that in one of the contact surface facing away from the inner wall of the recess Slot or multiple slots is formed or are, wherein each lever arm of the pivot lever associated with a slot is for receiving the lever arm in at least an end position of the adjustment. That way is an abutment of the lever arm of the pivot lever on the Contact surface opposite inner wall of the recess prevents, so that the achievable tilt angle the pivot lever is further increased.

Conveniently, in the embodiments corresponds with the slit or the slits the light Width of each slot substantially the extent the associated lever arm parallel to the pivot axis the swing lever or is slightly larger than this. at This embodiment is the stability of the drive element or the actuating element by the Slits affected only as far as this is due the width of the lever arm, which may be narrow may, is required.

Shape and size of the plant part are in wide Borders selectable. The system part can, for example be plate-shaped or rod-shaped. A advantageous development provides that the system part by a preferably at the free end ds Swivel lever arranged rotatably mounted roller formed is. In this embodiment, the friction is of the plant part is reduced to the contact surface, so that Power losses due to friction and wear the contact surface are avoided.

The shape of the drive element or the actuating element is selectable within wide limits. An advantageous Further, provides that the drive element or the actuator to its in mounting position the pivot lever facing side on one side is open. In this embodiment is the drive element or actuator formed like a box and only to the pivot lever open, otherwise closed. To this Way, high stability is achieved.

Basically, the contact surface essentially perpendicular to the linear axis of movement of the drive element run. Appropriately, the However, contact surface relative to the linear axis of motion inclined the drive element. In this way the achievable pivot angle of the pivot lever is increased.

In the aforementioned embodiment, the contact surface be a substantially flat surface, the preferably relative to the linear axis of motion of the Drive element inclined at an acute angle is. However, the contact surface can also at least partially arcuate in cross section be, preferably an imaginary connecting line between endpoints of the arcuate cross section of Bearing surface relative to the linear axis of movement of Drive element inclined at an acute angle is. In these embodiments, in terms of on the angle of articulation of the pivot lever on the Investment area particularly favorable conditions.

A development of the embodiment with the im Cross-section arcuate contact surface provides that this concave towards the pivot lever in cross-section is trained.

According to another advantageous development is the clear width between the contact surface and a opposite inner wall of the recess larger as the extension of the pivot lever or the system part between the contact surface and the opposite Inner wall. This is a clamp the pivot lever or the system part in the recess prevented.

The part in which the recess is formed can made of any suitable material. Conveniently, the part is made of plastic, such as this provides a further education. In this embodiment is the preparation of the invention Furniture drive further simplified and thus more cost-effective designed as the drive element or the actuating element a simple and inexpensive Molded plastic can be.

The linearly movable drive element can in any be suitably trained. A functional one Continuing provides that the linearly movable Drive element a torsion and axial direction movable on a rotatably driven adjusting spindle held spindle nut is. Such spindle drives stand as simple and inexpensive standard components available, so that the production of the inventive Furniture drive further simplified and thus more cost-effective is designed. Since the spindle nut in the rule is a plastic molding, the Recess in the manufacture of the spindle nut in these are molded.

In kinematic reversal of the aforementioned embodiment can the linearly movable drive element but also a movable in its axial direction, be against rotation mounted adjusting spindle, on the one fixed, rotatably driven spindle nut arranged is.

Another embodiment of the invention Teaching provides that the pivot lever in the mounting position the furniture drive rotatably with a rotatably mounted Wave is connected with one to be adjusted Part of the furniture is in operative connection. Here, the pivot lever is usually not part the furniture drive, but a Verstellbeschlages, for example, on a slatted frame. The swivel lever However, it can also be part of the furniture drive.

Other expedient developments provide that Each drive unit has an electric motor and / or that the drive units of the double drive are accommodated in a common housing.

The invention will be described below with reference to the appended, illustrated in a highly schematic drawing, in which an embodiment is shown.

Fig. 1

in stark schematisierter Seitenansicht ein Ausführungsbeispiel eines erfindungsgemäßen Möbelantriebs, wobei aus Gründen der Darstellung ein Teil des Gehäuses, in dem die Antriebseinheiten aufgenommen sind, weggelassen ist,

Fig. 2

eine Ansicht von unten in Fig. 1 auf ein Betätigungselement einer Antriebseinheit des Ausführungsbeispiels gemäß Fig. 1,

Fig. 3

einen Schnitt entlang einer Linie A-A in Fig. 2,

Fig. 4

in gleicher, gegenüber Fig. 1 vergrößerter Darstellung eine Antriebseinheit des Möbelantriebs gemäß Fig. 1 in einer ersten Verstellage,

Fig. 5

in gleicher Darstellung wie Fig. 4 die Antriebseinheit gemäß Fig. 4 in einer zweiten Verstellage,

Fig. 6

in stark schematisierter Seitenansicht ein Ausführungsbeispiel einer Stützeinrichtung für eine Polsterung eines Sitz-und/oder Liegemöbels in Form eines Lattenrostes, der mit einem Möbelantrieb gemäß Fig. 1 versehen ist, in einer ersten Verstellage,

Fig. 7

die Stützeinrichtung gemäß Fig. 6 in einer zweiten Verstellage,

Fig. 8

in zu Fig. 2 ähnlicher Darstellung ein Betätigungselement eines zweiten Ausführungsbeispieles eines erfindungsgemäßen Möbelantriebs und

Fig. 9

in zu Fig. 3 ähnlicher Darstellung das Betätigungselement gemäß Fig. 8.

It shows:

Fig. 1

in a highly schematic side view of an embodiment of a furniture drive according to the invention, wherein omitted for the sake of illustration, a part of the housing in which the drive units are included,

Fig. 2

1 a view from below in FIG. 1 of an actuating element of a drive unit of the exemplary embodiment according to FIG. 1,

Fig. 3

a section along a line AA in Fig. 2,

Fig. 4

in the same, compared to FIG. 1 enlarged representation of a drive unit of the furniture drive according to FIG. 1 in a first adjustment position,

Fig. 5

in the same representation as FIG. 4, the drive unit according to FIG. 4 in a second adjustment position,

Fig. 6

in a highly schematic side view of an embodiment of a support means for a padding of a seat and / or reclining furniture in the form of a slatted frame, which is provided with a furniture drive according to FIG. 1, in a first Verstellage,

Fig. 7

the support device according to FIG. 6 in a second adjustment position,

Fig. 8

in Fig. 2 similar representation of an actuating element of a second embodiment of a furniture drive according to the invention and

Fig. 9

in similar to Fig. 3 representation of the actuator of FIG. 8th

In Fig. 1 is an embodiment of an inventive Furniture drive 2 shown in this Embodiment designed as a double drive is and two drive units 4, 4 ', which in a common housing 6 are received and by Not shown fastening means held on this are. Hereinafter, only the drive unit 4 explained in more detail. The drive unit 4 'is corresponding constructed, and their components are denoted by reference numerals provided with the reference numerals of the components of Drive unit 4 correspond.

The drive unit 4 has a linearly movable Drive element, which in this embodiment by an axial direction in the direction of a Double arrow 8 reciprocating adjusting spindle 10 is formed, which in this embodiment as Threaded spindle is formed. On the adjusting spindle 10, which is mounted against rotation, as further is explained in more detail below, is a fixed, with an internally threaded spindle nut 12 is arranged, by a in the drawing only schematically indicated electric motor 14 via a not shown Gear is drehantreibbar. The drive units 4, 4 'are not shown in the drawing Control means separately or together controllable. To power the drive units 4, 4 'are also not shown Voltage supply means provided.

The adjusting spindle 14 is in the mounting position of Furniture drive 2 with a about a pivot axis 16th pivotally mounted pivot lever 18 for pivoting the same in operative connection. The pivot lever 18 is not part of the furniture drive in this embodiment 2, but part of a Verstellbeschlages a supporting device, not shown in Fig .. 1 for supporting a padding of a seat and / or Reclining furniture, for example a slatted frame.

For pivoting the pivot lever 18, the Drive unit 4, an actuator 20, the with the pivot lever 18 facing the end of the adjusting spindle 10 is connected, the connection between the adjusting spindle 10 and the actuating element 20 on Train and pressure is claimable.

The actuator 20 is in this embodiment made of plastic and is like a box and formed open to the pivot lever 18 side open. It has a recess 22, in which the Pivot lever 18 protrudes in its radial direction, as can be seen from Fig. 1. For clarification the operation of the furniture drive according to the invention is the actuator 20 in the side view according to Fig. 1 shown cut.

Fig. 2 shows a view from below in Fig. 1 the actuator 20 of FIG. 1, wherein seen is that the actuating element 20 at its the Adjusting spindle 10 facing narrow side 24 and on its opposite narrow side 26 and its Long sides 28, 30 is formed closed. Out Fig. 3, which is a section along a line A-A in Fig. 2 shows, it can be seen that the actuating element 20 also formed closed at its top 32 is. In this way, the actuator is especially 20 stable.

By Innenandung the recess 22 is a Bearing surface 34 for the free end of in Fig. 3 not illustrated pivot lever 18 is formed, which in cross section arcuate and concave towards the pivot lever 18 runs. An imaginary connecting line between End points 36, 38 of the arcuate cross-section of Contact surface 22 forms with a linear movement axis the adjusting spindle 10, which in Fig. 3 by a dash-dotted line 40 is indicated, an acute Angle.

One of the contact surface 34 opposite inner wall 42 of the recess 22 is also arcuate formed and extends to the contact surface 34 substantially parallel.

In the direction parallel to the pivot axis 16 next the contact surface 34 has the actuating element 20 Slits 44, 46 extending from the contact surface 34 in the direction of the end 26 of the actuating element 20th extend and to the pivot axis 16 of the pivot lever 18 are substantially perpendicular. In appropriate Way, extending from the wall 42 slots 48, 50 in the direction of the narrow side 24 of the actuating element 20th

From the drawing is not apparent and therefore is explained here that the pivot lever 18 at This embodiment is fork-shaped and two parallel to each other, in the direction parallel to Swivel axis 16 mutually spaced narrow lever arms of which in the drawing only one lever arm 52 is recognizable. Between the lever arm 52 and the further lever arm is on which the pivot axis sixteenth opposite end of the pivot lever a system part to Plant held on the contact surface 34, which in this Embodiment is formed by a roller, the about an axis parallel to the pivot axis 16 rotatable is mounted on the pivot lever 18.

The illustrated in Fig. 4 adjustment of the drive unit 4 corresponds to the embodiment a first end position in which the means of the furniture drive adjustable parts of the not shown in Fig. 2 Furniture not adjusted relative to each other are. In this end position is the role of 54 of the contact surface 34 is disengaged, as shown in FIG. 4th is apparent. Here, the lever arm 52 of the Swing lever 18 in the slot 50, while the other, not visible in the drawing lever arm in the slot 48 engages.

For pivoting the pivot lever 18 and thus for adjusting one with the pivot lever 18 in operative connection standing, not shown in Fig. 4 Part of a piece of furniture is the spindle nut 12 by the electric motor 14 so rotationally driven that the adjusting spindle 10 together with the actuating element 20 moves in Fig. 4 to the right. Here is the running Swivel lever 18 with its role 54 on the contact surface 34, in the course of the adjustment the pivot lever 18 is applied loosely and a Traction on the pivot lever 18 exerts, due to that the pivot lever 18 in Fig. 4 in the clockwise direction around his Swivel axis 16 pivots.

Moved in the course of the adjustment the roller 54 on the contact surface 34 along Fig. 4 upwards, so that the pivot lever 18 continues to pivoted its pivot axis 16.

When pivoting the pivot lever 18 moves a not shown in FIGS. 1 to 5 part of a Furniture, with the pivot lever 18 in a suitable manner is in operative connection.

Fig. 5 illustrates the other end position of the adjustment movement that is a maximum adjustment of the to be adjusted Part of the furniture, not shown corresponds. In this second end position of the adjustment the lever arm 52 engages in the slot 44 and the other Lever arm of the pivot lever 18 in the slot 46 a.

As can be seen from a comparison of FIGS. 4 and 5 is through the slots 44, 46 and 48, 50th prevents the pivot lever 18 in the region of the end positions the adjustment movement with its the pivot axis 16 facing part of the walls of the recess 20th abuts. Through the slots 44, 46 and 48, 50 is thus allows the pivot lever 18 into the area the upper wall of the actuating element 20th far into the recess 22 protrudes, so that at at the same time large swivel angle of the pivot lever 18th between its end positions, in the embodiment about 72 °, an extremely low height of the drive unit 4 and thus the entire furniture drive 2 allows is.

Characterized in that the contact surface 34 in cross section arcuate and concave toward the roller 54 formed is arising in terms of during the Adjusting movement changing angle under which the actuator 20 attacks on the pivot lever, especially favorable conditions.

As is apparent from Figs. 4 and 5, the clear width between the contact surface 34 and the opposite Wall 42 of the recess 22 larger as the extent of the roller 54 in this direction. On this way is a clamping of the roller 54 in the recess 22 avoided. It also avoids this in this way that then when a means of the pivot lever 18th displaced part of a furniture, the pivot lever 18 in the illustrated in Fig. 5 second end position of the adjustment under the influence of a user on looking to move clockwise, the role at the Wall 42 reaches the plant and the actuator this is claimed to pressure.

In Fig. 6 is provided with the furniture drive 2 Supporting device for supporting an upholstery of a Sitting and / or reclining furniture presented at this embodiment by a slatted frame 56th is formed. The slatted frame 56 has a frame 58 as well as several articulated support parts on. In detail, the slatted frame has a middle Support member 60, with one side hinged and pivotable about a horizontal pivot axis Upper body support member 62 is connected to the the middle support member 60 side facing away from and pivotable about a horizontal pivot axis Headrest 64 is connected. With the upper body support part 62 facing away from the middle support member 60 is articulated and about a horizontal pivot axis pivotally a leg support part or thigh support part 66 connected, with which the middle support part 60 facing away articulated and about a horizontal Swivel axis pivotally connected to a calf support member 68 is.

For adjusting the leg support part 66 and the calf support part 68 relative to the central support member 60th a pivotable adjusting lever 70 is provided, rotatably connected to a pivot shaft 72, with the pivot lever 18 rotatably connected is. The adjusting lever 70 is thus together with the Pivoting lever 18 about its pivot axis 16 pivotally. The leg support part 68 lies with its underside loose on the lever 70.

For adjusting the upper body support member 62 and the headrest member 64 relative to the central support member is another adjusting lever 74 is provided, the rotatably connected to another pivot shaft 76 is, with that of the drive unit 4 'associated Swivel lever 18 'is rotatably connected. The further Adjusting lever 74 is thus together with the pivot lever 18 'about the pivot axis 16' pivotable.

With the pivot lever 18 'remote from the end 78th the adjusting lever 74 is pivotally end 80 of a Anlenkhebels 82 connected, the other end 84 hinged is connected to the headrest part 64.

Fig. 6 shows the slatted frame 56 in a position in the support members 62, 64, 66, 68 relative to the middle Support member 60 are not adjusted. To adjust the leg support member 66 and the calf support member 68 relative to the central support member 60 drives the electric motor 14, the spindle nut 12 such that the Adjusting spindle 10 with the actuating element in FIG. 6 moved to the right, so that the pivot lever 18 of the Actuator 20 is taken and this order pivoted its pivot axis 16 in Fig. 6 in the clockwise direction. This pivots accordingly also the Adjusting lever 70 clockwise and adjusts the Calf support member 68 together with the leg support member 66, until the end position shown in Fig. 7 of the adjustment is reached.

In a corresponding manner drives to adjust the Upper body support member 62 and the head support member 64th relative to the central support member 60 of the electric motor 14 'of the drive unit 4', the spindle nut 12 'such on that the adjusting spindle 10 'with the actuating element 20 'in Fig. 6 moves to the left. This is the pivoting lever 18 'of the actuating element 20' entrained and pivoted in Fig. 6 in a clockwise direction, so that the further adjusting lever 74 pivots and the upper body support member 62 and the head support member 64 adjusted until the end position shown in FIG Adjustment movement is reached.

To return to that shown in Fig. 6 Adjustment drives the electric motor 14, the spindle nut 12 such that the adjusting spindle 10 together moved with the actuator 20 in Fig. 6 to the left. Here are the leg support part 66 and the Calf support member 68 under their weight back. The Return of the upper body support member 62 and the headrest part 64 takes place in a similar manner.

The furniture drive 2 according to the invention is simple and cost-effective in construction as well as robust. Due to the inventive design of the actuating element 20 and 20 ', the pivot lever 18, 18' relative be formed short, so that a compact design results in low height.

As can be seen from FIGS. 6 and 7, stands the furniture drive 2 according to the invention due to this low height not above the frame 28 of the slatted frame 56.

For mounting the furniture drive 2 on the slatted frame 56, the housing 6 from above on the pivot shafts 72, 76 of the fitting of the slatted frame 56 mounted and with cap-shaped locking elements 86 and 88 (see. Fig. 1) secured, wherein the blocking element 86 in FIG from the left and the blocking element 88 in Fig. 1 from the right is pushed onto the housing 6.

The housing 6 may be made of plastic and the Recording the occurring during operation of the furniture drive 2 high forces metal reinforcements have.

In Fig. 8, an actuating element 20 of a second embodiment of an inventive Furniture drive 2 shown, extending from the actuator 20 differs according to FIG. that in the area of the contact surface 34 only has a single slot 90; which is different from the contact surface 34 in the direction of the end 26 of the Actuator 20 extends and to the pivot axis 16 of the pivot lever, not shown in Fig. 8 is substantially perpendicular. The swivel lever is contrary to in this embodiment the embodiment shown in Figures 1 to 7 not fork-shaped, but has only one lever arm. One in Fig. 8 also not shown plant part is at the free end of the Swivel lever arranged and extends transversely to the Slot 90, such that the system part on both sides of the Slot 90 rests against the contact surface 34.

The fact that in the contact surface 34 only one Slot 90 is provided is in this embodiment the stability of the actuating element 20th improved. In addition, the actuator 20 is easier produced.

Fig. 9 shows a longitudinal section through the actuating element 20 as shown in FIG. 8 in the region of the slot 90. From Fig. 9 it can be seen that the contact surface 34 facing away wall 42 of the recess 22 in this Embodiment perpendicular to the linear axis of movement 40 runs. In Fig. 8 and Fig. 9 is the Adjusting spindle not shown, the train and pressure claimable with the contact surface 34 facing away End 24 of the actuating element 20 is connected.

Claims (22)

1. Supporting device for supporting upholstery of an upholstered seat and/or upholstered couch,
      having a furniture drive (2) for adjusting support parts (60-68) of the supporting device (56) relative to one another, with the furniture drive (2) having a linearly movable drive element for pivoting a pivoted lever (18) operatively connected to a support part (60-68) of the supporting device (56) to be adjusted,
      wherein the drive element is a spindle nut which is held on a rotatingly drivable actuating spindle such that it is protected against torsion and is movable in an axial direction, or an actuating spindle (10) which is supported in such a way that it is movable in its axial direction and protected against torsion, on which actuating spindle is located a fixed spindle nut (12) which can be rotatingly driven,
      wherein the linearly movable drive element or an actuating element connected thereto has a recess (22), into which the pivoted lever (18) projects in its radial direction, and
      wherein an inner wall of the recess (22) forms a contact surface (34) for the pivoted lever (18) and
      wherein the contact surface (34) acts slackly upon the pivoted lever (18),
      characterised in that
      the contact surface is formed in the direction of the linear axis of movement of the drive element on the end (26) of the recess (22) facing away from the actuating spindle such that, during the adjustment of the part of the furniture to be adjusted, the drive element or the actuating element pulls by means of the furniture drive (2) on the pivoted lever (18).
2. Supporting device as claimed in Claim 1, characterised in that at least one slot (44, 46) for receiving the lever arm (52) of the pivoted lever (18) in an end position of the adjustment movement is provided in the contact surface (34) or in the area of the contact surface, and that the pivoted lever (18) lies in contact with a contact part on the contact surface (34) at a distance from the slot (44, 46).
3. Supporting device as claimed in Claim 2, characterised in that the contact part extends essentially parallel to the pivoting axis (16) of the pivoted lever (18).
4. Supporting device as claimed in Claim 1, characterised in that the pivoted lever (18) is configured in the form of a fork with two lever arms (52) running parallel to and at a distance from one another and that the contact part is held between the lever arms (52) of the pivoted lever (18).
5. Supporting device as claimed in Claim 4, characterised in that the contact surface (34) is formed on a projection, with the clearance between the lever arms (52) of the pivoted lever (18) essentially corresponding to or exceeding the extent of the projection in this direction.
6. Supporting device as claimed in Claim 4, characterised in that two slots located at a distance parallel to the pivoting axis (16) of the pivoted lever (18) extending essentially vertically to the pivoting axis (16) of the pivoted lever (18) are formed in the contact surface (34) or in the area of the contact surface (34), in order to receive the lever arms (52) of the pivoted lever (18) located at a distance in an end position of the adjustment movement.
7. Supporting device as claimed in Claim 1, characterised in that one slot or several slots (48, 50) is or are formed in an inner wall (42) of the recess (22) facing away from the contact surface (34), with each lever arm (52) of the pivoted lever (18) having a slot (48, 50) allocated thereto, in order to receive the lever arm (52) in an end position of the adjustment movement.
8. Supporting device as claimed in Claim 6 or 7, characterised in that the clearance of each slot (44, 46; 48, 50) essentially corresponds to or somewhat exceeds the extent of the allocated lever arm (52) in the direction parallel to the pivoting axis (16) of the pivoted lever (18).
9. Supporting device as claimed in Claim 1, characterised in that the contact part is formed by a rotatably supported roller (54) preferably arranged at the free end of the pivoted lever (18).
10. Supporting device as claimed in Claim 1, characterised in that the drive element or the actuating element (20) is configured open on one side towards its side facing the pivoted lever (18), in the assembly position.
11. Supporting device as claimed in Claim 1, characterised in that the contact surface (34) is inclined relative to the linear axis of movement (40) of the drive element.
12. Supporting device as claimed in Claim 11, characterised in that the contact surface is an essentially level surface.
13. Supporting device as claimed in Claim 12, characterised in that the contact surface (34) is inclined at an acute angle relative to the linear axis of movement (40) of the drive element.
14. Supporting device as claimed in Claim 11, characterised in that the cross-section of the contact surface (34) is configured in the form of an arc, at least in sections.
15. Supporting device as claimed in Claim 14, characterised in that an imaginary connecting line between end points (36, 38) of the cross-section in the form of an arc of the contact surface (34) is inclined at an acute angle relative to the linear axis of movement (40) of the drive element.
16. Supporting device as claimed in Claim 14, characterised in that the cross-section of the contact surface (34) has a concave configuration towards the pivoted lever (18).
17. Supporting device as claimed in Claim 1, characterised in that the clearance between the contact surface (34) and an opposite inner wall (42) of the recess (22) is greater than the extent of the pivoted lever (18) or the contact part between the contact surface (34) and the opposite inner wall (42).
18. Supporting device as claimed in Claim 1, characterised in that the part, in which the recess is formed, consists of plastic.
19. Supporting device as claimed in Claim 1, characterised in that, in the assembly position of the furniture drive (2), the pivoted lever (18) is connected in a non-rotational manner to a rotatably supported shaft which is operatively connected to a part of the furniture to be adjusted.
20. Supporting device as claimed in Claim 1, characterised in that the furniture drive (2) is embodied as a double drive with two drive units.
21. Supporting device as claimed in Claim 19, characterised in that each drive unit (4, 4') has an electric motor (14, 14').
22. Supporting device as claimed in Claim 19, characterised in that the drive units (4, 4') of the double drive are accommodated in a common housing (6).

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