EP2721951B1 - Furniture with movable furniture part - Google Patents

Description

Technical area

The invention relates to a piece of furniture, comprising a stationary furniture part, a movable furniture by a drive part and a controller for controlling the drive.

State of the art

There are various furniture with adjustable by drives furniture parts known, for example, tables with height-adjustable table top, drawers with motor and / or extract or beds with motor-adjustable elements. In addition to the drive and a controller for controlling the drive elements are necessary with which the user can control the control and thus the movement of the movable furniture part. These may be simple actuators such. B. buttons act, with which a desired direction of movement is selectable. Such elements are simple and intuitive to use, but they allow only a few simple operations.

So z. B. the DE 40 24 081 A1 (OTM Möbelwerke Helmut Seidel) a height-adjustable furniture table with a lifting device for raising and lowering the table top. Thus, the table can be adjusted without effort, the lifting device is driven by an electric motor. Switches for controlling the movement are arranged on the underside of the table top. The motor is switched on as long as the corresponding button is occupied by the user's hand.

More versatile options also provide known, more complex control devices with a variety of actuators (or even a touch screen) and caching for desired positions to be approached.

The DE 30 27 374 A1 (Siemens AG) describes implements with a height-adjustable working part, wherein the height can be adjusted with a mounted on the height-adjustable working part control device to the body size of a user. The control device converts the absolute height of the working part into a value equivalent to the respective body height and operates electrically. To control the height adjustment of a table top includes, inter alia, a rocker switch and a display to display the corresponding height of the work height of the table top body height. To determine the working height setting, the control device has an ultrasonic transmitter.

The operation of these devices is not very intuitive. It requires some getting used to or even training the users. This is for complex furniture such. As operating tables, which are used by trained personnel, little problematic. For in itself simply constructed furniture such. B. height adjustable tables but an intuitive and ergonomic operation is desired.

The DE 10 2006 008 505 A1 (Siemens) discloses a patient table with a manually and via a motor movable table top. At least one sensor for determining the force exerted by a user on the table top force for table top movement is present on the table top. The motor is used to support the manual force and is dependent on the sensor signal taking into account a predetermined Controlled reference value, so that the manual force does not exceed the reference force value. The reference force value is designed so that the user virtually simulates a certain table mass and table friction. The sensor for determining the force applied, z. B. a strain gauge sensor, is attached directly to the table top, z. B. in a user to be gripped handling section.

This publication thus proposes to measure the actuation force exerted by the user on the movable furniture part and to support this actuation force by the drive in such a way that a certain maximum force is not exceeded - the operating procedure changes in comparison to the manual adjustment only insofar as the actuation forces be reduced. The operation is thus intuitive.

The implementation of this concept is however complicated and not equally suitable for all furniture. It is a specific handling section necessary to equip with a force sensor for direct detection of the operating force.

The JP 11 009 355 A2 (Yamaha Living Tec) discloses a device, e.g. As a dishwasher, with an outer housing and a relative to this outer housing in the vertical direction by means of a drive movable inner part. A handle is rotatably mounted on a base plate of the inner part. The force exerted by a user on the handle is measured and the movement of the inner member is controlled in response to the measured force.

Instead of buttons thus a per se known control element, namely a handle, is used as an actuating element. The drive thus supports the "natural" operation by the user. Again, the operation is intuitive.

However, not all furniture to be automated includes such known controls that could be converted. The additional attachment of such controls is aesthetically often unsatisfactory. Often it is also not desirable to design known and usually fixed to the furniture controls movable, because the mobility can suggest poor quality ("wobble").

Presentation of the invention

The object of the invention is to provide a furniture belonging to the aforementioned technical field, which is aesthetic and allows a simple and intuitive operation of a drive for the movable furniture part.

The solution of the problem is defined by the features of claim 1. According to the invention, the movable furniture part comprises an actuating portion which is movably arranged on a main part of the movable furniture part. Further, at least one force sensor for measuring a force applied to the operating portion is arranged and connected to the controller.

Because the operation is done over a part of the movable furniture part, no additional operating elements (such as buttons, handles o. Ä.) Are necessary, the aesthetics will not be disturbed. The movable arrangement of the actuating portion allows a simple arrangement of the force sensor and a simple force measurement.

The actuating portion may be arranged on the movable furniture part such that its mobility is not visible relative to the main body and not or practically not felt during the operation. The operating portion is thus an integral part of the movable furniture part. In order to enable a force measurement, a small path of the actuating portion is sufficient relative to the main part.

By virtue of the arrangement according to the invention, the actuating section can be integrated into the design of the piece of furniture in such a way that it can not be recognized as such from the outside. In order to alert the user to the possibility of actuation, however, it can also be highlighted in color, by a texture, the choice of material and / or its shaping. It is also possible to emphasize the transition between the main part and the actuating section by one or more of the means mentioned.

In a preferred embodiment of the invention, the movable furniture part is a tabletop and the actuating portion to a range of this Tabletop. Tabletops usually do not include common controls for height adjustment. By making the operating portion an integral part of the table top, it is not readily visible and does not interfere with the aesthetics of the table top. For example, the operating portion may be configured to provide a continuous and seamless upper table surface that is commonly formed by the body and the operating portion. The actuating portion thus forms part of the table top, which merges (at least substantially and as far as visible to the user) without transition into the main part. At the transition, for example, a kind of hinge (with a small pivoting path) may be provided, which forms a pivot axis at the transition of the two parts. The application of a force to the operating portion then leads to a slight tilting of the corresponding main plane to the main plane of the main part, to this pivot axis. With a suitable design of the hinge and the force sensor, a fraction of an angular degree which is neither visually nor haptically recognizable to the user is sufficient.

Particularly preferably, the actuating portion is formed by an edge region, in particular a corner region of the table top. Such an area can be easily gripped by the user for actuation, and it is structurally easy to realize because the transition between the main part and the operating section can take place along a straight line. In the corner area, the user can also attack the plate both on the side and on the longitudinal edge. The operating portion is thus always accessible, regardless of the installation of the table and the user can usually choose the preferred and thus ergonomic attack direction.

The corner area may be chamfered or rounded for improved ergonomics and / or aesthetics. Further, it can be chamfered in various ways.

Advantageously, the table top comprises at a transition between the main part and the actuating portion a weakening point with reduced cross-section. Thus, in the manner of a solid-body joint, a hinge (or a desired bending point) can be created in a simple manner and without additional elements, such as joints or bearings, and thus a movable operating section relative to a main part, wherein the desired Mobility, that is, the desired for a given path of movement force can be specified by the dimensioning of the weakening point. The weakening point can be z. B. be formed by a cutout on the underside of the table.

The invention is not limited to height-adjustable tables. It can also be realized in connection with other furniture, for. B. self-propelled carcasses, height-adjustable chairs, etc.

Preferably, the furniture comprises an activating element, wherein the control can be switched from a first operating state to a second operating state by actuating the activating element, wherein in the first operating state a force exerted on the actuating section does not trigger any movement of the furniture part and wherein in the second operating state one exerted on the actuating section Force triggers a movement of the furniture part. An action on the operating portion thus does not result in any case directly to a movement of the movable furniture part. Namely, since the operating portion forms part of the movable furniture part, such movement is not always desired when a force is applied to the portion.

In a preferred embodiment, the activation element functions in the manner of a button, wherein the control is in the second operating state as long as an actuation of the activation element is detected.

Alternatively, a brief actuation of the activation element leads to switching to the respective other operating state. The activation element may also be designed in the manner of a switch, so that it is possible to switch back and forth between the one and the other operating state.

In a further embodiment of the invention, a first actuation of the activation element leads to switching to the second operating state. The controller then automatically switches the second operating state after expiry of a first predetermined time after actuation of the activation element into the first operating state, if within this first predetermined time no actuation of the actuation section is detected. If an actuation occurs, the controller switches the second operating state after expiration of a second predetermined time after the last actuation of the operating section automatically in the first operating state. This operation allows that in the context of the operation of the height adjustment only activation by pressing the activation element, eg. B. by briefly tapping a button is required. The changeover to the first (deactivated) operating state always takes place automatically. The first predetermined time and the second predetermined time may be the same or different. For example, the controller can be programmed so that after touching the activation element, the height adjustment is activated for 4 s, ie when acting on the operating section during the following four seconds, a movement of the movable furniture part takes place. If the user no longer acts on the actuating section for a period of, for example, 2 s or if there is no action during the said 4 s, the control switches back to the first operating state. For a (further) height adjustment, a new activation is necessary.

Advantageously, the controller is designed such that, in the second operating state, measured values of the at least one force sensor are evaluated in order to control the drive. The force sensor thus provides not only a digital bivalent signal (yes / no operation), but a force value that can be further processed. This allows, for example, the definition of a force threshold to be overcome when an adjustment is to be made or further differentiations in the control of the movement.

Namely, it is preferable to control a speed of movement of the furniture part depending on a value of the measured force, wherein a moving direction is substantially parallel to a direction of the measured force. The user can thus sensitively dose the movement of the movable furniture part by the force exerted by him on the operating portion and the direction selection is intuitive by the exercise of a substantially pointing in the desired direction force. Depending on the possibility of movement only a force component is taken into account: Is it the furniture z. B. a height-adjustable table, the table top can be moved vertically down and up, only the vertical force component is evaluated or detected at all. This leaves For example, achieve that a movement of the actuating portion substantially along this direction is possible. If the vertical force component is directed upwards, the table is raised, if it is directed downwards, it is lowered. But there are also more complex control operations possible, for. B. in 2-dimensionally adjustable furniture parts. In these cases, corresponding additional force components are recorded and taken into account.

When switching to the second operating state, the control preferably stores a reference force and the subsequent control of the movement of the furniture part takes place as a function of a difference between a currently measured force and the reference force. This achieves an automatic calibration on each activation, i. H. even if the zero force changes in the absence of actuation of the actuating portion (eg due to material aging or because constant forces independent of the actuating action act on the actuating portion), the control always takes into account the actual actuating force.

Alternatively, this measure can be dispensed with, especially if it is unlikely that, for example, objects are placed on the operating section or additional elements are fastened thereto. Finally, it is also possible to provide a calibration option at the request of the user or during the maintenance of the table, z. B. by the activation element is actuated for a certain minimum time or by an additional operating element is actuated, for. B. a switch arranged on the control electronics, which by means of a thin tool (screwdriver, ballpoint pen) can be reached from the outside.

Preferably, the activation element comprises a capacitive switching element. This can be easily and inconspicuously integrated into a movable furniture part. Furthermore, it does not respond to purely mechanical influences such as pressure, but essentially to the change in capacitance, which results in the approach of a particular user's hand. Finally, it is subject to virtually no wear.

Advantageously, the activation element is arranged in the operating section. This results in a simple structure with short signal paths and intuitive operation for the user by being able to perceive both the activation and the control of the movement by means of the operating section.

Advantageously, the furniture comprises a display element for displaying the second operating state. As a result, the user recognizes whether the furniture is in the activated state or not. Operating errors can thus be avoided. The display element may in particular be an optical display element, but acoustic or haptic elements are also conceivable. The display element may indicate the activated and / or the deactivated state and / or the switching from one to the other operating state.

Advantageously, elements of the control (eg electronic components) are accommodated in a receptacle in the movable furniture part. Ideally, the entire controller is housed in such a receptacle (or more such receptacles). This allows the controller to be completely concealed while protecting it from environmental impact. By attaching near the force sensor and possibly the activation switch, the signal paths can be short. In a particularly preferred embodiment, the actuating portion comprises a receptacle in which both the controller and the force sensor and the activation switch and the connections between these components are accommodated.

In a preferred embodiment, the display element comprises a light source, which is arranged in the receptacle (eg an LED), and a light guide, which opens into an edge of the furniture and makes light of the light source visible on an outside of the furniture. This design is robust and allows an unobtrusive and aesthetic realization of the display element.

A display element is not mandatory. For example, if the activation element is designed so that it responds to a normal operation of the height adjustment by exerting a force on the actuating portion, a display element can be omitted.

Advantageously, the at least one force sensor comprises at least one strain gauge, which is arranged at the transition between the actuating portion and the main part of the movable furniture part. He is so attached that he has powers due to a Can detect relative movement of the two parts. A strain gauge is well suited to detect the change in shape between the main body and the actuating portion. It can be arranged, for example, on a support element, which is partially connected fixedly connected to the main part and the operating portion. A relative movement of the two parts then leads to a deformation of the carrier element, which can be measured by means of the strain gauge.

From the following detailed description and the totality of the claims, further advantageous embodiments and feature combinations of the invention result.

Brief description of the drawings

Fig. 1

Ein Blockschaltbild eines erfindungsgemässen Möbels mit bewegbarem Möbelteil;

Fig. 2

eine perspektivische Darstellung des Bestätigungsabschnitts des erfindungsgemässen Möbels;

Fig. 3

eine teilweise Explosionsdarstellung des Betätigungsabschnitts;

Fig. 4A-E

eine Darstellung eines Bedienungsablaufs durch einen Benutzer; und

Fig. 5

ein Flussdiagramm des Ablaufs in der Steuerung des erfindungsgemässen Möbels.

The drawings used to explain the embodiment show:

Fig. 1

A block diagram of an inventive furniture with movable furniture part;

Fig. 2

a perspective view of the confirmation section of the inventive furniture;

Fig. 3

a partially exploded view of the actuating portion;

Fig. 4A-E

a representation of an operation procedure by a user; and

Fig. 5

a flowchart of the process in the control of the inventive furniture.

Basically, the same parts are provided with the same reference numerals in the figures.

Ways to carry out the invention

The FIG. 1 is a block diagram of an inventive furniture with movable furniture part. The furniture 1 comprises a stationary furniture part 2, z. B. a table frame, and a relatively movable furniture part 3, z. B. a height-adjustable table top. The height adjustment via a drive 10, z. B. an electric motor which acts in a conventional manner on a spindle of a lifting column 4.

The movable furniture part 3 comprises a main part 3a and a movable operation section 3b, as described below, in connection with FIGS Figures 2 and 3 described in more detail. The force exerted on the actuating section 3a during a relative movement of the actuating section 3b to the main section 3a is detected by a force sensor 20 which is arranged at the transition between the actuating section 3b and the main section 3a. The measured values of the force sensor are transmitted to a controller 30 which, among other things, controls the drive 10 for height adjustment.

Also coupled to the controller 30 are an activation switch 40 and an activation indicator 50, both of which are disposed in the actuating portion 3b. Not shown is the power supply for the drive 10, the controller 30, the activation indicator 50 and any other components to be supplied with electrical energy. This is carried out in the usual way.

In the illustrated embodiment, the operating portion 3b forms the front (ie the user facing) left corner of a table top 3 of a height-adjustable table 1. Die FIG. 2 is a perspective view of the confirmation section, seen from above. To improve the presentation of the table top is partially transparent. The FIG. 3 is a partial exploded view of the operating portion, seen from below.

Between the operating portion 3b and the main part 3a of the table top 3 extends obliquely, at an angle of approximately 45 ° to the side edges of the table top 3, a cutout 61 which extends from the underside of the table top 3 partially into this. The cutout 61 extends almost from the longitudinal to the transverse edge of the table top 3. This creates a kind of solid joint, the geometry of the cutout 61 together with the materials of the table top 3 and other elements involved, the bending zone and strength of the corner and thus the Force for a (minor) relative movement between the actuating portion 3b and main part 3a defined. The Arrangement of the cutout 61 allows actuation both from the (left) side and from the front. By choosing a different angle, z. B. an angle of 35 ° to the table longitudinal edge, the proportion of the longitudinal edge, which is occupied by the operating portion can be increased, which simplifies operation on the table leading edge.

In the operating section 3b, an approximately rectangular recess 62 is further milled, which also extends from the underside of the table partially in the table top 3 inside. In the corner region of the table top, the recess 62 is supplemented by a cylindrical part 62a. The cross section of the table top 3 is also slightly reduced in the entire region of the operating section 3b on the underside. The substantially triangular section of reduced cross-section extends beyond the milled recess 61.

A further cutout 63 of lesser depth than the cutout 61 extends from the recess 62 to the cutout 61. The further cutout 63 extends from the actuating section 3b into the main part 3a. It comprises a first section 63a, which opens perpendicularly into the rear longitudinal side of the recess 62, and a second section 63b, which adjoins the first section 63a at an angle of approximately 45 ° and perpendicularly crosses the central region of the cutout 61. A further cutout 64 in the form of a channel, starting from the substantially rectangular recess 62, runs vertically through the cutout 61 into the main part 3 a of the table top 3.

The table top 3 is enclosed by edge strips 5, 6. These are chamfered at their meeting ends, so that the corner of the table top 3 as a whole has a bevelled corner. Enclosed by the skirting and the entire table surface (body 3a and operating section 3b) overlapping is a cover, for. B. made of synthetic resin, linoleum or a wood veneer on the table top 3. It forms the useful surface of the table 1.

In the second section 63b of the further cutout 63, a strain gauge 21 is accommodated as a force sensor. This is fastened on a carrier element 22, which is realized as a sheet metal part. This is shaped so that a central bending beam and two fastening tabs result, which protrude from the same longitudinal edge of the bending beam perpendicular to this in two opposite directions. The two attachment tabs each comprise two attachment openings. By means of screws 23 which are guided through these openings, the support member 22 can be secured in the recess 63, wherein the one tab is fixedly connected to the main part 3 a of the table top 3, the other tab fixed to the operating portion 3 b of the table top 3. The bending beam directed perpendicular to the main plane of the table top 3 is received in the cutout 61 in the fastened state.

A force on the actuating portion 3b results in a relative displacement of the two fastening tabs, which causes an S-shaped deformation of the bending beam. This deformation of the bending beam is measured by means of the bending beam fixedly arranged strain gauge 21.

By means of a cable, the strain gauge 21 is connected to a control electronics 31. The latter is constructed on a base plate 32 (PCB), which is received in the recess 62 and fixed by four screws to the table top 3. The recess 62 includes areas of greater depth for receiving certain components of the control electronics 31. The control electronics 31 includes u. a. suitable modules for amplification and processing of the sensor signals and a central control unit for processing the sensor signals and for generating control signals for the activation display and the drive. In the cylindrical portion 62a of the recess 62, an antenna 41 is received, which is formed substantially as a U-shaped bent sheet metal part. It acts in a manner known per se as a capacitive proximity sensor. Also, the antenna 41 is connected to the control electronics 31.

In the channel-like cutout 64 cables for the power supply and the control signal for the drive and the pulse signal from the corresponding motors are inserted. These run from the control electronics 61 through the channel to corresponding openings in the bottom of the table top. This will guide them to the appropriate components.

Finally, runs parallel to the main surface of the table top through the table top and the longitudinal side skirt 5, a cylindrical bore 51 which opens into the recess 62 for the control electronics 31 and emerges through the front of the skirt 5. In this bore 51, a cylindrical acrylic glass rod is received as a light guide 52. The control electronics 31 comprises a white LED light source 53, which is arranged on the base plate such that its light can be conducted through the light guide 52 to the front of the edge strip 5, so that there the activation indicator 50 is formed.

The recesses 61, 63 and the recess 62 in the operating portion 3b and the components received therein are covered by a grounded metal plate 65 formed of sheet metal, whose thickness corresponds to the reduction of the cross section in the corner, so that the table bottom is substantially continuous. The bottom plate 65 is screwed by a plurality of screws in its edge region with the table top 3. The screws are arranged along the side and the longitudinal edge of the table top 3, so that the bottom plate 65 does not restrict the mobility of the operating section excessively.

The FIGS. 4A-E schematically illustrate an operation procedure by a user FIG. 5 shows a flowchart of the sequence in the controller 30. The initial position is in the FIG. 4A shown schematically. The height-adjustable table top 3 is located at a certain initial height. The height adjustment is disabled (step 101), which is signaled by the activation indicator 50 being dark (step 102). The controller 30 is in a standby mode in which operations of the activation switch 40 are detected.

A user now activates the height adjustment by bringing his hand closer to the corner of the table, as in the FIG. 4B shown. The antenna 41 of the activation switch 40 detects this approach and transmits the corresponding information to the controller 30. Once it detects an approximation (decision 103), this switches to an activated operating state (step 104). Otherwise, the operating state remains deactivated. The activated operating state is the user - as in the FIG. 4B indicated - by a glowing activation indicator 50 signals (step 105). The Activation ensures that inadvertent actuations are avoided when exerting a force on the actuation section.

As long as the controller is in the activated operating state, the activation indicator 50 lights up. As long as the user can also by applying a downward force ( FIG. 4C ) or an upward force ( Figure 4D ) Move the table up or down: The applied force leads to a minimal change in the angle between the main part 3a of the table top 3 and the operating portion 3b. This change in angle leads to a force on the strain gauge 21. The corresponding measured value is detected by the controller 30 and converted via the drive 10 into a movement whose direction substantially corresponds to that of the force exerted by the user on the actuating portion 3b (step 108).

The controller 30 distinguishes three ranges of values of the amount of the detected force. Below a certain minimum force F_min under control of the drive is omitted, a height adjustment does not take place (decision 106). In a middle range, the speed of the height adjustment is controlled depending on the operating force, and a higher operating force also leads to an increased speed. Different force gradients (linear, progressive, degressive) are possible. At an upper limit force, the height of the table top 3 is changed at a predetermined maximum speed (step 107). Even if a force higher than the upper limit force is measured, the adjustment remains at this speed.

The movement is stopped when the detected force falls below the minimum force when an upper or lower end position of the table top is reached, when the activation switch 40 is no longer actuated or when a collision with an obstacle is detected. Such detection can take place via means not shown here, known per se, for. B. by monitoring the power consumption of the drive motor.

A deactivation, ie a switching of the controller 30 in the corresponding operating state, then takes place when no actuation of the activation switch 40 is detected, the user thus his hand away from the corner (decision 103). The Figure 4E shows this target state, which - with the exception of a possibly changed table height - again according to the state FIG. 4A equivalent. For a (further) height adjustment, a new activation is necessary.

The invention is not limited to the illustrated embodiment. In particular, details of the structural design such. B. the geometry of the cutouts and recesses or the positioning of the individual control and display elements be designed differently. For example, the cutouts can penetrate the entire table top with suitable dimensioning of the cover and be covered on the top only by the cover. Section by section, the components received in a cutout can be visible from above, e.g. B. Display elements for the current table height or for activation. In one possible embodiment, the control electronics comprise a 7-segment display (eg for three digits), which is visible through a breakthrough on the table top. The display is covered for example by a black tinted glass, which runs substantially in the plane of the table surface. The 7-segment display, for example, allows the display of the current table height.

The force-dependent control can be combined with other controls, eg. B. with standard buttons or a remote control. In addition to the manual height selection also the start of predetermined or freely configurable heights can be provided. Furthermore, in particular, the sensors and display elements used can also be based on other technologies.

As already mentioned, the invention is also not limited to height-adjustable tables, but also applicable in connection with other furniture.

In summary, it should be noted that the invention provides a piece of furniture with a movable by a drive furniture part, which is aesthetic and allows easy and intuitive operation of the drive.

Claims (14)

1. Item of furniture comprising

   a) a stationary furniture part (2),

   b) a furniture part (3) which can be moved by a drive (10),

   c) a controller (30) for controlling the drive (10),
   wherein

   d) the movable furniture part (3) comprises an operating section (3b) which is arranged movably on a main part (3a) of the movable furniture part (3), wherein

   e) at least one force sensor (20) for measuring a force which is exerted on the operating section (3b), and is connected to the controller (30).
2. Item of furniture according to Claim 1, characterized in that the movable furniture part (3) is a tabletop, and the operating section (3b) is a region of this tabletop.
3. Item of furniture according to Claim 2, characterized in that the operating section (3b) is formed by a corner region of the tabletop.
4. Item of furniture according to Claim 2 or 3, characterized in that the tabletop comprises a weak point with a reduced cross section at a transition to the operating section (3b).
5. Item of furniture according to one of Claims 1 to 4, characterized by an activation element (40), wherein the controller (30) can be switched from a first operating state to a second operating state by operation of the activation element (40), wherein a force which is exerted on the operating section (3b) does not trigger any movement of the furniture part (3) in the first operating state, and wherein a force which is exerted on the operating section (3b) triggers a movement of the furniture part (3) in the second operating state.
6. Item of furniture according to Claim 5, characterized in that the controller (30) is designed in such a way that measurement values of the at least one force sensor (20) are evaluated in the second operating state in order to control the drive (10).
7. Item of furniture according to Claim 6, characterized in that a speed of the movement of the furniture part (3) is controlled in dependence on a value of the measured force, wherein a direction of movement is substantially parallel to a direction of the measured force.
8. Item of furniture according to Claim 6 or 7, characterized in that the controller (30) stores a reference force when it is switched to the second operating state, and subsequent control of the movement of the furniture part (3) is performed in dependence on a difference between a currently measured force and the reference force.
9. Item of furniture according to one of Claims 5 to 8, characterized in that the activation element (40) comprises a capacitive switching element.
10. Item of furniture according to one of Claims 5 to 9, characterized in that the activation element (40) is arranged in the operating section (3b).
11. Item of furniture according to one of Claims 5 to 10, characterized by an indicator element (50) for indicating the second operating state.
12. Item of furniture according to one of Claims 1 to 11, characterized in that elements of the controller (30) are accommodated in a receptacle (62) in the movable furniture part (3).
13. Item of furniture according to Claims 11 and 12, characterized in that the indicator element (50) comprises a light source (53) which is arranged in the receptacle (62), and a light guide (52) which issues into an edge of the item of furniture and displays light from the light source (53) on an outer face of the item of furniture.
14. Item of furniture according to one of Claims 1 to 13, characterized in that the at least one force sensor (20) comprises at least one strain gauge (21) which is arranged at a transition between the operating section (3b) and the main part (3a) of the movable furniture part (3).

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