Electric adjusting supporting device

Abstract

An electrically adjustable support device for supporting a cushion of sitting and / or lying furniture, in particular a mattress of a bed, has a first support part and a second support part for supporting the cushion, the support parts being rotatably adjustable relative to each other. An electric drive for adjusting support parts relative to each other has at least one electric motor and at least one output part translatable along an output axis, and at least one mechanical connection element for adjustably connecting the or each output part to the support part to be adjusted. According to the invention, at least one push rod is arranged on or in the first support part and can be moved along a translation axis, the push rod being operatively connected, on one hand, to an electric drive and, on the other hand, to the second support part, in order to be able to adjust the support parts relative to each other during a translation movement of the push rod, wherein the output shaft and the translation shaft are at an angle to each other, in particular 90 DEG or approximately 90 DEG.

Description

Technical Field

[0001] The invention relates to an electrically adjustable supporting device for supporting a cushion of a sitting and / or lying furniture, in particular a mattress of a bed. Background Art

[0002] Such support devices, for example in the form of slatted frames, are generally known, for example from EP 1 239 754 B1 and EP 2 418 984 B1. They have a first support part and a second support part for supporting a cushion, the support parts being rotatably adjustable relative to one another. The known support device also has an electric drive device for adjusting the support parts relative to one another, the device having at least one electric motor and at least one output part which can be moved in translation along an output shaft, and at least one mechanical connection element for adjustably connecting the or each output part to the support part to be adjusted.

[0003] DE 10 2021 120 007 A1 discloses a support device consisting of a base and a support part, which is used to be inserted between a mattress and a lower structure of a bed in order to add an electric adjustment function to the bed. For example, the support device can be arranged between a slatted frame of the bed and the mattress. Summary of the invention

[0004] The object of the present invention is to provide a support device for a cushion of a piece of sitting and / or lying furniture, in particular a mattress of a bed, which device is improved over the known support devices.

[0005] The present invention solves this task.

[0006] The present invention provides that at least one push rod is movably arranged along a translation axis on or in the first support part, and the push rod is operatively connected to the electric drive device on the one hand and to the second support part on the other hand, so that during the translation movement of the push rod, the support parts are rotated and adjusted relative to each other, and the output shaft and the translation axis form a certain angle with each other, in particular, an angle of 90° or approximately 90°.

[0007] According to the invention, for example, in particular in two hollow longitudinal bars of the first support part, which are spaced apart from each other transversely to the longitudinal direction of the support device, one push rod can be accommodated in each case. According to the invention, the output shaft and the translation axis are at an angle, in particular at an angle of 90° or approximately 90°, so that the electric drive can be arranged on the hollow transverse bar of the first support part, so that all components required for adjusting the support parts relative to each other can be accommodated in the first support part.

[0008] In this way, since no parts of the electric drive device are exposed, the structure is compact and also very beautiful.

[0009] According to the invention, the angular arrangement of the shafts also provides the possibility of adjusting the support part by a single electric motor, so that the force flow direction of the adjusting force is deflected and transmitted to the push rod. Therefore, the design of the invention is particularly simple, economical and durable, with relatively few parts.

[0010] A particular advantage of the support device according to the invention is that the overall height is relatively low, and therefore it is particularly suitable for being arranged between the mattress and the lower structure of the bed in order to add an electric adjustment function to the bed.

[0011] The structure of the support part can be selected within a wide range according to the respective requirements and circumstances. In this respect, an advantageous aspect of the invention is that the first support part has two longitudinal bars, which are spaced apart from each other transversely to the longitudinal direction of the support device. A corresponding structure with two longitudinal bars is preferred, in principle, the first support part can also have only one longitudinal bar or more than two longitudinal bars.

[0012] An advantageous aspect of the above-described embodiment is that a push rod is provided on each of the two longitudinal rods, which is movable along the associated translation axis, and each push rod is operatively connected on the one hand to the output element of the electric drive and on the other hand to the second support part for adjusting the support parts relative to one another. In this embodiment, a push rod is guided in or on each longitudinal rod so that the adjustment forces for adjusting the support parts relative to one another are introduced symmetrically into the first support part in the longitudinal center plane of the support device. This prevents the support parts from twisting during the adjustment process.

[0013] A particularly advantageous aspect of the invention is that at least part of at least one of the longitudinal bars is hollow and defines a cavity in which the associated push rod can be accommodated and guided along the associated translation axis. Since the push rod or push rods are accommodated in the longitudinal bar or bars, the push rods are not exposed, thereby preventing the user from contacting the moving parts of the support device.

[0014] An advantageous aspect of the above embodiment is that the push rods are operatively connected to a common output member of the electric drive device, and when the output member moves along the output axis, the push rods move in the same direction along their respective associated translation axes. Such a design is particularly simple and has relatively few components.

[0015] However, if required according to the respective requirements and conditions, the electric drive device can also have two or more output components. In this respect, an advantageous aspect of the invention is that the electric drive device has two output components, wherein each output component is operatively connected to a push rod, and when the output component moves along the output axis, the push rods move in the same direction along the respectively associated translation axis.

[0016] A transmission device can be conveniently arranged between at least one output element of the electric drive device and at least one push rod. A corresponding arrangement of the transmission device can adapt the adjustment force required to be applied when adjusting the support parts relative to each other to the respective conditions.

[0017] In the above embodiments, the transmission device can be designed in different ways. In this regard, an advantageous aspect of the present invention is that the transmission device is designed as a lever transmission device. The corresponding lever transmission device is simple in design, strong and durable, and only relatively little design work is required when designing the support device to adjust the adjustment force within a large range.

[0018] In order to achieve a particularly simple design in the above-described embodiment while enabling the actuating force to be diverted from the output element or an output element in the electric drive to the push rod, an advantageous aspect of the invention is that the lever transmission has a first two-arm lever, which is arranged at a pivot point about the pivot axis,

[0019] - its first lever arm is articulated to one end of a second lever, the other end of the second lever is operatively connected to the associated connecting element, in particular is articulated to the associated connecting element, and

[0020] - Its second lever arm cooperates with the associated push rod for adjusting the supporting parts relative to each other.

[0021] The operative connection between the first lever and the push rod can be established in different ways according to different requirements and conditions. In terms of structural simplicity, an advantageous aspect of the invention in this respect provides a third lever of the lever mechanism, one end of which is articulated with the second lever arm of the first lever and the other end of which is articulated with the push rod.

[0022] In order to make the overall height of the supporting device particularly low, an advantageous aspect of the above embodiment is that the rotation axis of the first lever is perpendicular or approximately perpendicular to the plane defined by the output axis and the translation axis.

[0023] The electric drive can be designed in different ways depending on the respective requirements and conditions. In this respect, an advantageous aspect of the invention is that the electric drive has a screw drive with a threaded screw and a screw nut arranged on the threaded screw. The corresponding screw drive can be provided as a relatively simple and inexpensive standard component and is robust and durable.

[0024] An advantageous aspect of the above embodiment is that the screw nut can be connected to the motor of the electric drive device for rotational driving, and the threaded screw is arranged to be anti-twist and movable in the axial direction and forms an output component of the electric drive device. In this embodiment, the threaded screw can be provided with a connecting element at two points spaced apart from each other in the axial direction thereof, respectively, for adjustingly connecting the threaded screw with the two push rods.

[0025] Another advantageous aspect of the invention is that the first support part has at least one crossbar which is at least partially hollow and defines a cavity in which the electric drive device including the electric motor is accommodated. In this way, the electric drive device can be arranged on the crossbar without exposing any parts of the drive device.

[0026] According to a further advantageous aspect of the invention, the support parts are connected to one another in such a way that in the initial position of the adjustment movement they define a substantially horizontal support plane, whereas in the end position of the adjustment movement they are arranged at an angle to one another.

[0027] Depending on the requirements and conditions, the force transmission of the support parts during the adjustment relative to each other can be carried out in different ways. In this respect, an advantageous aspect of the invention is that the end of each push rod facing the second support part cooperates with a contact surface of a cam body, which is connected to or formed on the second support part, wherein the shape of the contact surface allows the support parts to be adjusted in rotation relative to each other during the translational movement of the push rod. The shape of the contact surface determines the kinematic characteristics of the adjustment movement.

[0028] The number of supporting parts of the supporting device can be selected within a wide range according to the respective requirements and conditions. In this respect, an advantageous aspect of the invention is to design the supporting device in two parts in relation to the supporting part, consisting of a first supporting part and a second supporting part. This embodiment is particularly preferred if the supporting device is to be arranged between the substructure of the bed and the mattress in order to provide an electric adjustment function.

[0029] A piece of furniture designed according to the present invention comprises a supporting device designed according to the present invention.

[0030] A bed according to the invention has a base and a cushion device, in particular a mattress, placed on the base, characterized in that the support device according to the invention is arranged between the base and the cushion device.

[0031] The invention will be explained in more detail below by means of an embodiment with reference to the highly schematic drawings. It will be obvious to a person skilled in the art that each individual feature of the embodiment may further constitute an embodiment individually, i.e. independently of the other features. Therefore, for a person skilled in the art, all the features described, shown in the drawings and claimed in the claims constitute the content of the invention in themselves and in any technically meaningful combination with each other, regardless of their overview in the claims and their dependencies and regardless of their specific description or representation in the drawings. The subject matter and disclosure of the present application also include sub-combinations of the claims, in which at least one feature of the claims is omitted or replaced by another feature. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] It shows:

[0033] Figure 1 is a schematic perspective view of an embodiment of a support device according to the present invention in an initial position of an adjustment movement, wherein the first support portion and the second support portion open a substantially horizontal support plane,

[0034] Figure 2 and Figure 1 The schematic diagram of the supporting device shown in FIG. 1 is the same, wherein the components of the first supporting portion are omitted to show the structure of the motor drive device of the supporting device,

[0035] Figure 2A and Figure 2 The same shows Figure 2 A detail in

[0036] Figure 3 Shown with Figure 2 Same Figure 2 The supporting device shown in the figure omits other components of the first supporting part,

[0037] Figure 4 exhibit Figure 3 Details of the middle putter part.

[0038] Figure 5 exhibit Figure 4 A side view of a detail in order to illustrate the interaction between the push rod and the contact surface of the cam body formed on the second support part,

[0039] Figure 6 and Figure 1 Same, show Figure 1 The support device is shown in the end position of the adjustment movement, in which the support parts are adjusted to the maximum extent possible with respect to one another.

[0040] Figure 7 exhibit Figure 6 Details in the area of ​​the electric drive, with the components of the first support section omitted,

[0041] Figure 8 and Figure 6 Same, show Figure 6 The support device shown in FIG. 1 , wherein the components of the first support portion are omitted, and

[0042] Fig. 9 and Figure 5 Similar, show Figure 5 , adjust the end position of the movement. DETAILED DESCRIPTION

[0043] Next, we will refer to Figures 1 to 9An embodiment of the support device according to the present invention is explained in more detail. For the sake of intuitiveness and simplified description, some parts are omitted in the figures. The omitted parts will be supplemented accordingly in the relevant figures.

[0044] Figure 1 An embodiment of an electrically adjustable support device 2 according to the invention is shown, which is used for supporting a cushion of a sitting and / or lying furniture, in particular a mattress of a bed, and has a first support part 4 and a second support part 6 for supporting the cushion. The support parts 4, 6 can be rotated relative to each other about a horizontal rotation axis 8 (see Figure 2 ).

[0045] Figure 1 The starting position of the adjustment movement is shown. Figure 5 The end position of the adjustment movement is shown by comparing Figure 1 and Figure 5 It can be seen that the support parts 4, 6 are connected to one another in such a way that in the starting position of the adjustment movement they define a substantially horizontal support plane, whereas in the end position of the adjustment movement they are arranged at an angle to one another.

[0046] The support device 2 also has an electric drive 10 for adjusting the support parts 4 , 6 relative to one another, which in the illustrated embodiment comprises only one electric motor 12 .

[0047] In the illustrated embodiment, the electric drive device has a screw drive 16 with a fixed screw nut 18, which is connected to the output shaft of the motor for rotational driving. To this end, the output shaft of the motor 12 is designed as a screw, which meshes with the turbine teeth formed on the radial outer surface of the screw nut 18 (see in particular Figure 2 and Figure 3 ).

[0048] The screw nut 18 is arranged on the threaded screw 20 (see Figure 3 ), which is arranged to be rotationally fixed and movable in its axial direction, and constitutes the output component of the electric drive device 10. Therefore, the output shaft is determined by the axial direction of the threaded screw 20 and is perpendicular to the longitudinal direction of the support device 2. Figure 3 It is indicated by a dotted line 21 in the middle.

[0049] The threaded screw 20 has axially spaced connecting elements 22, 24 (see in particular Figure 3 ), which is used to adjustably connect the output component of the electric drive device 10 (i.e., the threaded screw 20 in the illustrated embodiment) with the support portion to be adjusted. Figures 3 to 5 The adjustable connection device is described in detail. In the illustrated embodiment, the connection elements 22, 24 consist of plastic blocks, which are connected to the threaded screw 20 and can withstand tension and compression.

[0050] To simplify the description, the power supply and control device for powering and controlling the electric drive device 10 is not shown. However, the structure of the corresponding power supply and control device is generally known to the technician, so it will not be described in detail here.

[0051] According to the invention, at least one push rod 26 is movably arranged on or in the first support part 4 along a translation axis, wherein the translation axis extends in the longitudinal direction of the support device 2. Figure 3 The push rod 26 is connected to the electric drive device 10 on the one hand and to the second support part 6 on the other hand, so that the support parts 4 and 6 can be adjusted relative to each other during the translation of the push rod 26. Figures 3 to 5 This is explained in detail.

[0052] According to the invention, the output shaft 21 and the translation shaft 27 are at an angle to one another, namely at an angle of 90° or approximately 90° in the embodiment shown.

[0053] In the illustrated embodiment, the first support part 4 has two longitudinal bars 28, 30 which are spaced apart from one another in a direction transverse to the translation axis 7, i.e., transverse to the longitudinal direction of the support device 2. The longitudinal bars 28, 30 are connected to one another at their ends facing away from the second support part 6 by a crossbar 32. Between the crossbar 32 and the end of the first support part 4 facing the second support part 6, there are further plate-shaped crossbars 34 which extend between the longitudinal bars 28, 30, only one of which is marked with the reference numeral 34 in the figure (see FIG. Figure 1 ).

[0054] In addition, the support device 2 can also be configured with only one longitudinal rod. In contrast, the embodiment shown in the figure with two (or more) longitudinal rods has the advantage of being more stable and preventing the support parts 4, 6 from twisting during the adjustment process.

[0055] The longitudinal bar 28 has a longitudinal bar 36 in the form of a metal guide rail (see Figure 2 ), on which there is a cover 38. The longitudinal rod 30 has a corresponding structure, so it is not described in detail here. The cover 38 forms a cavity in which the push rod 26 can move along the translation axis 27.

[0056] Like the crossbar 32 and other crossbars 34, the cover 38 can also be formed by plastic injection molding. In the illustrated embodiment, the crossbar 32 is composed of plastic half shells 40, 42, which constitute the drive housing 44 of the electric drive device 10 (see Figure 2 and Figure 3 ).exist Figure 2 In the figure, for the sake of clarity, the upper half shell 40 is omitted.

[0057] Except for the cross bar 32, the basic structure of the second support portion 6 is the same as the basic structure of the first support portion 4, and therefore will not be described in detail.

[0058] In the illustrated embodiment, in addition to the push rod 26, a further push rod 46 is provided, which movably guides a cover 48 of the longitudinal rod 30 in a manner corresponding to the push rod 26. The push rods 26, 46 are connected on the one hand to the threaded screw 20 as an output element of the electric drive 10 and on the other hand to the second support part 6 for adjusting the support parts 4, 6 relative to each other. This will be explained in detail below.

[0059] In the exemplary embodiment shown, the longitudinal rods 28 , 30 are therefore partially hollow and define a cavity in which the associated push rod 26 , 46 is received and guided movably along the associated translation axis.

[0060] The push rods 26 , 46 are operatively connected to the threaded screw 20 as the output component of the electric drive device 10 , which will be described in detail below. When the threaded screw 20 moves along the output shaft 21 , the push rods 26 , 46 move in the same direction along their respective associated translation axes.

[0061] In the transmission system between the electric motor 12 and the push rod 26 , a transmission device is provided in the illustrated embodiment, which is a lever transmission device 50 in the illustrated embodiment.

[0062] The following will refer to Figure 2A The structure of the lever transmission device 50 will be described in detail.

[0063] The lever transmission device 50 has a double-arm first lever 54, which is arranged at a rotation point around the rotation axis 52.

[0064] a first lever arm 56 is articulated at one end to a second lever 58, the other end of which, in the embodiment shown, is articulated to the associated connecting element 22, and

[0065] A second lever arm 60 cooperates with the push rod 26 for adjusting the supporting parts 4, 6 relative to each other.

[0066] The operative connection between the first lever and the associated connecting element 22 can also be arranged in another way instead of being hinged.

[0067] In the illustrated embodiment, the first lever 54 is formed from a plastic injection-molded part.

[0068] In the illustrated embodiment, the lever transmission device 50 has a third lever 62, one end of which is hinged to the second lever arm 56 of the first lever 54 and the other end of which is hinged to the end of the push rod 26 away from the second support portion 6. In the illustrated embodiment, the third lever 62 is formed by a plate bending part.

[0069] The adjustment connection of the push rod 56 to the connecting element 24 is carried out in a corresponding manner via a further lever mechanism 64 (see in particular Figure 3 ), wherein the first lever is marked with reference numeral 66.

[0070] Figure 5 The push rod 26 is shown as an adjustable connection to the second support part 6. The end of the push rod 26 facing the second support part interacts with a contact surface of a cam body 70, which is molded on the second support part 6 in the embodiment shown, wherein the contact surface 68 is shaped so that the support parts 4, 6 can be adjusted relative to each other in rotation during the translation of the push rod 26. The position of the force application point of the push rod 24 on the contact surface 68 is selected relative to the rotation axis 8 so that the push rod 24 Figure 5 The starting position of the shown adjusting movement will not be in the dead center. As can be seen, the push rod 26 acts on the contact surface 68 loosely.

[0071] The adjustment connection between the push rod 46 and the second support part 6 is carried out in a corresponding manner, so it will not be described in detail:

[0072] According to the present invention, the supporting device 2 functions as follows:

[0073] from Figure 1 The adjustment movement starts from the initial position shown, and the motor 10 drives the screw nut 18 so that Figure 2 The threaded screw 20 in the embodiment moves from bottom to top. Here, the first lever 54 (see Figure 2A ) Figure 2A The rotating shaft 52 in the embodiment rotates clockwise, so that the third lever 62 is pressed toward the second supporting portion 6 , and correspondingly, the free end of the push rod 26 is pressed toward the contact surface 68 .

[0074] During the further movement of the threaded screw 20, the free end of the push rod 26 slides along the contact surface 68, so that due to the curved shape of the cross section of the contact surface 68, the first support part 4 rotates relative to the second support part 6 about the rotation axis 8 until reaching Figure 6 End position of the adjusting movement shown.

[0075] The same is true for the push rod 46 .

[0076] Since both ends of the third lever 62 are respectively hinged to the first lever 54 and the push rod 46 , the third lever 62 will make a slight angular movement during the adjustment movement.

[0077] Due to the articulation of the second lever 58 with the connecting element, and the articulation of the third lever 62 with the second lever 58 and the push rod 26, a force transmission connection that can withstand tension and compression is established between the relevant components. In addition to the articulation, other force transmission connections that can withstand tension and compression can also be established between the components.

[0078] from Figure 6 The end position shown is returned to Figure 1 In the starting position shown, the drive device 10 is in an open state, but is affected by the weight of the first support part 4 or the weight of a person on the support device 2.

[0079] The supporting device 2 provided by the present invention has a simple structure and is suitable for applying a larger regulating force.

[0080] A particular advantage of the support device 2 according to the invention is that all movable parts required for realizing the electric adjustment function are integrated in the support device 2, because its longitudinal rods 28, 30 and 32 are hollow and can accommodate the push rods 26, 46 or parts of the electric drive device 10 as well as the transmission 50, 66 and the motor 12. This ensures a "clean" appearance of the support device 2 and prevents the user of the support device 2 from being injured by moving parts. In addition, the overall height of the support device 2 is low.

[0081] According to different requirements and situations, the support device 2 of the present invention can be designed into three or more parts related to the support part. In the embodiment shown, the support device 2 is designed into two parts related to the support part, and therefore only consists of the first support part 4 and the second support part 6.

[0082] The corresponding embodiment is particularly suitable for retrofitting beds with an electrically adjustable function. For this purpose, the support device 2 is inserted or arranged between the mattress and the substructure of the bed (e.g. a slatted frame), in particular in the head region of the bed. By adjusting the support parts 4, 6 relative to each other, the electrically adjustable function can be realized in a simple manner without mechanical intervention in the substructure of the bed, in which way the mattress can be raised, for example in the head region, in order to turn the bed from a lying position to a sitting position. Accordingly, the support device 2 can also be arranged in the foot region of the bed, for example if it is necessary to raise the legs of a person lying on the support device for medical reasons.

[0083] List of reference numerals: 21 output shaft

[0084] 2 Support device 22 Connecting element

[0085] 4 Supporting part 24 Connecting element

[0086] 6 Support part 26 Push rod

[0087] 8 Rotation axis 27 Translation axis

[0088] 10 Electric drive 28 Longitudinal rod

[0089] 12 Motor 30 Vertical Rod

[0090] 16 screw drive 32 crossbar

[0091] 18 Screw nuts 34 Other crossbars

[0092] 20 threaded screw 36 longitudinal rod

[0093] 38 Cover 56 First lever arm

[0094] 40 half shell 58 second lever

[0095] 42 Shell 60 Second lever arm

[0096] 44 drive housing 62 third lever

[0097] 46 Push rod 64 Other lever transmission devices

[0098] 48 Cover 66 64 First Lever

[0099] 50 Lever actuator 68 Contact surface

[0100] 52 rotating shaft 70 cam body

[0101] 54 First Lever

Claims

1. An electrically adjustable support device (2) for supporting a cushion of a sitting and / or lying furniture, in particular a mattress of a bed, The invention comprises a first supporting part (4) and a second supporting part (6) for supporting a cushion, wherein the supporting parts (4, 6) can be rotated and adjusted relative to each other, An electric drive device (10) for adjusting the support parts (4, 6) relative to each other is provided, the device comprising at least one electric motor (12) and at least one output member which is movable in translation along an output shaft (21) and at least one mechanical connection element (22, 24) for adjustingly connecting the or each output member to the support part to be adjusted, It is characterized in that At least one push rod (26) is arranged on or in the first support part (4) and is movable along a translation axis (27), the push rod (26) being operatively connected on the one hand to the electric drive (10) and on the other hand to the second support part (6) in order to adjust the support parts (4, 6) relative to each other during the translation movement of the push rod (26), and The output shaft (21) and the translation axis (27) form a certain angle, in particular 90° or approximately 90°.

2. The support device according to claim 1, characterized in that: The first support part (4) has two longitudinal rods (28, 30) which are spaced apart from each other in the transverse direction of the translation axis.

3. The supporting device according to claim 2, characterized in that: A push rod (26, 46) movable along an associated translation axis is arranged in or on the two longitudinal rods (28, 30), each push rod (26, 46) being operatively connected to the output component or an output component of the electric drive device (10) on the one hand and to the second support part (6) on the other hand for adjusting the support parts (4, 6) relative to each other.

4. The supporting device according to claim 1, characterized in that: At least one longitudinal rod (28, 30) is at least partially hollow and defines a cavity in which the associated push rod (26, 46) is received and guided movably along an associated translation axis.

5. The supporting device according to claim 3 or 4, characterized in that: The push rods (26, 46) are operatively connected to a common output component of the electric drive device (10). When the output component moves along the output shaft (21), the push rods (26, 46) move in the same direction along their respective associated translation axes.

6. The supporting device according to claim 3 or 4, characterized in that: The electric drive device (10) has two output components, each of which is operatively connected to a push rod (26, 46). When the output component moves along the output shaft (21), the push rods (26, 46) move in the same direction along their respective designated translation axes.

7. The supporting device according to claim 1 or 2, characterized in that: A transmission device is arranged between at least one output component of the electric drive device (10) and at least one push rod (26).

8. The supporting device according to claim 7, characterized in that: The transmission device is designed as a lever transmission device (50).

9. The supporting device according to claim 8, characterized in that: The lever transmission device (50) has a double-arm first lever (54) arranged at a rotation point around a rotation axis (52). - its first lever arm (56) is hinged to one end of a second lever (58), the other end of which is hinged to the associated connecting element, and - Its second lever arm (60) cooperates with the associated push rod (26) for adjusting the support parts (4, 6) relative to each other.

10. The supporting device according to claim 9, characterized in that: The lever mechanism has a third lever (62), one end of which is hinged to the second lever arm (60) of the first lever (54), and the other end of which is hinged to the push rod (26).

11. A support device according to claim 9 or 10, characterized in that The rotation axis (52) of the first lever (54) is perpendicular or approximately perpendicular to the translation axis (27).

12. The supporting device according to claim 1 or 2, characterized in that: The electric drive device (10) has a spindle drive (16) with a threaded spindle (20) and a spindle nut (18) arranged on the threaded spindle (20).

13. The supporting device according to claim 12, characterized in that: The screw nut (18) is rotationally driven or rotatably driven connected to the motor (12) of the electric drive device (10), and the threaded screw (20) is arranged to be anti-twist and movable in its axial direction, and forms an output component of the electric drive device (10).

14. The supporting device according to claim 1 or 2, characterized in that: The first support portion has at least one crossbar (32) which is at least partially hollow and defines a cavity in which the electric drive device (10) including the electric motor (12) is accommodated.

15. The supporting device according to claim 1 or 2, characterized in that: The support parts (4, 6) are connected to one another in such a way that in the initial position of the adjustment movement they form a substantially horizontal support plane, whereas in the final position of the adjustment movement they are at an angle to one another.

16. The supporting device according to claim 1 or 2, characterized in that: The end of each push rod (26, 46) facing the second support part (6) cooperates with the contact surface (68) of a cam body (70), which is fixed or formed on the second support part (6), and the shape of the contact surface (68) enables the support parts (4, 6) to rotate and adjust relative to each other during the translation movement of the push rod (26, 46).

17. The supporting device according to claim 1 or 2, characterized in that: The supporting device (2) is designed to be two parts relative to the supporting part, consisting of a first supporting part (4) and a second supporting part (6).

18. A piece of furniture having a supporting device (2) according to one of the preceding claims.

19. A bed having a substructure and a cushioning device, in particular a mattress, placed on the substructure, characterized in that A support device (2) according to any one of claims 1 to 17 is arranged between the substructure and the cushion device.

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