EP1014001B1 - Device to control electrically controlled apparatus, in particular electric cooking apparatus - Google Patents

Abstract

The arrangement has at least one control element (5) mounted or able to be mounted on the outside of a panel (2), an associated holder for holding the control element on the panel and a sensor arrangement for interaction with a controller for detecting the position and/or positional change of the control element. The control element is a sliding element that automatically returns to a rest position and that moves along the panel in at least one direction (28,29).

Description

The invention relates to an arrangement for controlling electrically controllable devices, in particular electric cooking devices, according to the preamble of claim 1.

The preferred application of the invention is control of electrically operated household appliances, in particular electric cooking appliances, for example electric cookers with a glass ceramic hob and / or an electric one Oven. Generic control arrangements have at least one on an outside of a plate of the device can be arranged or arranged, manually operated control element, from an assigned holding device to or is kept near the plate. Furthermore, one is for interaction provided with a control device of the device Sensor device for detecting the position and / or change in position of the control element provided. By suitable Movement of the control element can be a desired switching state can be set.

A known and very frequently used version of such Controls or actuators are the well-known Knobs. Knobs can be used individually or as an assembly summarized on a front plate of a stove or the like. be arranged below the usual working level. Because of this arrangement, the scales of these knobs can sometimes difficult to read. There is also a risk that the knobs are reached and operated by toddlers become. Keeping them clean can be problematic. The installation the rotary knobs with corresponding mechanical holder devices usually requires a lot of space. These problems can partly by the arrangement of knobs on the Device top are fixed. EP 0 797 227 shows this one especially for mounting on glass ceramic plates suitable version, in which the knobs are attached by means of a holding magnets arranged on the underside of the glass ceramic plate be held magnetically through the plate. Knobs must have a certain minimum height in order for they can be easily gripped and twisted by hand. she can therefore handle cookware in the hob area to disturb. There is also a free one for their operation Hand necessary to hold the button securely and twist it can.

Another well-known class of controls is that Slider for setting a desired operating state on the basis of a mostly limited stroke Zero position by a defined displacement path in an end position corresponding to the desired switching state are pushing. Examples of such sliders are in the European patent application EP 0 497 191 or the US patents 3,711,672 or 3,852,558. The exact Setting a desired end position can be problematic be because a lively operator is first about the End position can slip out and then a subsequent one Correction is necessary.

Incidentally, both in the known knobs also with the sliders on the way to the desired one Run through all intermediate positions and, if necessary, the Switching states assigned to intermediate positions at least taken or activated for a short time.

The invention has for its object a generic Arrangement for controlling electrically controllable devices to create a safe setting with simple operation of a desired switching state.

To achieve this object, the invention proposes an arrangement with the features of claim 1. further developments the invention are specified in the dependent claims, the Wording by reference to the component of the description is made.

A control arrangement according to the invention is characterized by this from that at least one control element as automatic in a Return position slider is formed, which in at least one direction of displacement along the plate is movable. Such a slide or slide button creates the possibility of a move as such as a switching event without using it, for example for setting a desired switching state on the exact observance of one corresponding to this state Displacement path arrives. A self-resetting slide in contrast to conventional knobs or slide valves, not necessary to operate it with the Fingers of one hand can be gripped and moved, but can for example with the elbow, forearm or be operated from the back of a hand. This makes it easier Operation especially when, for example, both hands to hold a pot or the like. An inventive Slide switch is also particularly advantageous to digital further processing of sensor signals or Control signals adapted because a tax effective adjustment with subsequent return to the rest position as a for example, detectable by a digital counter Event is treatable. On the use of analog / digital converters, that with conventional knob or slider elements for the generation of digitally processable Signals that have to be used can be dispensed with.

Some advantages of the invention may be in only one single direction of displacement tax effective Slider buttons can be used. In a preferred further training it is provided that the control element based on the Rest position to generate at least two different ones Control signals in at least two different Displacement directions can be shifted for tax purposes. This allows the number of with a single control possible settings increase advantageously because the Direction of displacement now as a further input parameter for Control can be used. Although the individual directions of displacement in any, possibly quite small levels Angles must be aligned parallel to the plate surface can, it is preferred if at least two counterparallel switchable displacement directions are provided, whereby a uniaxial bidirectional slide switch can be implemented is. There are also multi-axis sliders possible. So in one embodiment, starting from a common rest position four perpendicular to each other aligned, tax effective displacement directions provided, which creates a two-axis, bidirectional sliding button is feasible. Movement directions can also be star-shaped or fan-shaped or the like. Where It is advisable to ensure that directions of displacement are far enough apart in the plane to be accidental Setting an undesired switching state to prevent by the user. One in several, preferably Coplanar directions of displacement of push buttons enables, among other things, the selection of the switching targets via the Choice of the direction of displacement. It is a direct switch for example between different operating modes a baking oven possible without the switch path too undesired operating modes switched on at least for a short time become. This protects both the heating components and also control components and avoids switching operations difficult to avoid for larger electrical currents Effects of switching to the power grid.

The use of a move event to control the Device can vary greatly depending on the circumstances advantageous types are made. So is for operational security reasons and advantageous to avoid incorrect operations provided that the sensor device with the Control device is coupled or cooperates that a tax effective postponement only when one is exceeded Minimum displacement in the respective direction of displacement entry. This can result in a lower threshold be created for a tax effective postponement, so that with an unintentional small movement of the Actuator and / or when moving in one of an intended direction of displacement deviating direction there is no tax effect. This ensures that only deliberate, targeted shifts have a tax effect result.

In a further development it can be provided that the sensor device is coupled to the control device in this way, that in the event of a tax-effective postponement a minimum shift width a single control signal is generated, preferably within certain limits regardless of the maximum deflection from the rest position displacement range reached. This allows the respective Direction of displacement assigned a yes / no statement that are particularly easy to process digitally. So can for example a certain direction of displacement Oven function (hot air, grill, bottom heat, top heat, Lower and upper heat, circulating air, etc.) can be assigned to the in each case via the key or slide process in the assigned Direction of displacement is adjustable. With a cooktop switch can for example a certain parboiling level can be selected, e.g. parboiling at 60% or 80% the nominal power.

It is also possible that the coupling is designed in such a way that with a tax effective shift a number of Control signals depending on a holding period in the displaced or deflected state is generated. A such time-dependent control can, for example step by step through menu items of a definable Control menus or for the gradual setting of temperature values or to select the operating mode in a predefined one Order can be used.

It is also possible to design the control in such a way that a Control signal depending on the number of consecutive, tax effective shifts in a given Direction of displacement is generated. So a user can use Multiple shifts a desired tax state adjust, where appropriate the number of shifts or touch operations counted and only then by another Tactile process is increased if this is briefly within a predefinable time limit after a previous one Touching takes place.

The switching status achieved in each case can be for the user easily recognizable, for example by an optical display displayed and / or made acoustically recognizable.

For mounting the control element on the plate, everyone can suitable holding device can be used, in particular also one with positive and / or non-positive acting mechanical holders and / or guides. To such Elements in particular on the outside of the panel too avoid, is in a preferred embodiment Holding device on the opposite of the control element Arranged inside the panel so that it is on the operator side can't bother. The holding device is preferably as a device for generating a, preferably magnetic, Force field formed, the non-contact, in particular through the plate, onto the control element works and holds it to or near the plate. A control element is preferably used exclusively by Force of the force field held on the plate, so that more Holding devices are not necessary. The control element can only be touch-free in the area of the job be held at which it should be operated and it can for example for cleaning purposes without the aid of Tools are removed from the plate. The plate, for example a glass ceramic plate, preferably no openings, passages, recesses, brackets o. Like. That could act as dirt traps or through which dirt enters the area of the inside of the plate could penetrate. The plate can be made of one material exist that the force field lines are practically undiminished lets through. The control element can, for example, on the Outside, i.e. the top or the front of the Plate rest, with a special configuration of the directly adjacent part to a smooth or low-friction Movements can contribute. This can be done, for example storage on rollers and / or balls is provided be e.g. at the bottom of the actuator may be appropriate. Under a non-contact bracket the control element is to be understood that this without direct mechanical connection is maintained. It can of course touch the plate.

Although the reset function according to the invention also by mechanical means, such as return springs or the like, is achievable, the reset function is preferred also effected without contact. The holder device can for this purpose at least one, preferably held stationary Holding magnets and the control element at least one in the same direction have polarized magnets. Then e.g. on the north-facing pole of the holding magnet and a this and the plate facing south pole of the magnet on or opposite in the control element and define via the relative position with the smallest possible mutual distance between the Magnet the rest position, where opposing poles Holding magnet and control element magnet face each other. The Interplay of appropriately polarized magnets, in particular Permanent magnet on both sides of the plate has one opposite also possible arrangement with a magnet on a Side of the plate and a magnetizable, for example ferromagnetic material on the other hand, the advantage a particularly sharp energy minimum of the magnetic Field in the area of minimum distance, so that the Rest position particularly reliably and precisely, too if, for example, frictional forces of an exact setting counteract.

A particularly safe and powerful holder for the control element and reset to the rest position at one preferred development achieved in that the holding device an inner magnet arrangement with at least one inner magnetic pole facing the disk and with radial disk parallel Distance to an outer magnet arrangement opposite Has polarity. Through the place of the inner Magnet arrangement can be the rest position of the control element be defined, while the outer magnet assembly essentially supports the guiding and resetting of the slide. Due to the opposite polarity of inner and outer magnet arrangement can be achieved that to a attraction caused by the inner magnet arrangement in Direction to the rest position through the outer magnet arrangement caused repulsion of the actuator in the direction to the rest position, which means particularly large restoring forces to be provided. For example, the outer Magnetic arrangement ring-shaped and / or rectangular around the inner magnet arrangement can be arranged. A suitable one magnetic guide for the uniaxial or described biaxial, bidirectional slide arrangements can be thereby achieve that the holding device for generation a multiple rotationally symmetrical force field, in particular Magnetic field is formed, preferably the force field a two-fold or a four-fold rotational symmetry with Has axis of rotation perpendicular to the plate.

In a development of the invention it is provided that the Sensor device at least one on the inside of the Plate arranged sensor, which on a through Actuation of the control element causes a change Field, especially a magnetic, electromagnetic or electric field. A sensor can, for example work capacitively, optically or inductively. The sensor device preferably has at least one Magnetic field sensitive sensor in the effective range of a magnet of the control element is arranged or can be arranged. It can be a reed contact or switch or act a coil or the like. Hall sensors are preferred permanently reliable due to the lack of moving parts work and their output signals in the form of DC voltages are particularly easy and safe to process. The Sensor can have the same physical appearance be influenceable, also for holding the control element is used, in particular by a magnetic field. Then can individual components, such as a magnet of the Control element, a dual function both in the context of Holding means, as well as within the scope of the sensor device. Particularly inexpensive and the character of a sliding button Embodiments in which only one sensor is provided for each direction of displacement, whose output signal is a tax effective shift displays.

A further development of the invention provides that the sensor device at least two for emitting sensor signals has trained sensors and that the control device at least one logical link unit to the logical Linking the sensor signals or from the sensor signals derived signals. This makes it possible to use relatively few, for example only two sensors one over the number of sensors goes beyond the multitude of different ones Set switching states that result from the states the individual sensors through logical links e.g. after the rules of Boolean algebra. The sensor device can in particular with the control device cooperate that when the control element is removed from the Plate the device is switched to a stable off state or is switched. As a result, a manually operable, Electromechanical on / off switch created be, in particular the protection against unauthorized persons Use especially by children playing. It can also be such that the sensor device with the Control device interacts that when at rest operating element located in the off state deviating standby state is switched or is switched. This standby function can be faster Promote commissioning if necessary, as it is in the standby function certain basic functions can already be activated.

These and other features go beyond the claims also from the description and the drawings, wherein the individual features individually or separately several in the form of sub-combinations in one embodiment of the invention and in other fields be and advantageous designs can represent.

Fig. 1

einen schematischen Vertikalschnitt durch eine Ausführungsform einer erfindungsgemäßen Steueranordnung, die an einer Glaskeramikplatte eines Kochherdes mit Glaskeramik-Kochfeld angebracht ist und

Fig. 2

eine schematische Draufsicht auf die unterhalb der Glaskeramikplatte angeordneten Einrichtungen der Steueranordnung von Fig. 1.

An embodiment of the invention is shown in the drawings and is explained in more detail below. The drawings show:

Fig. 1

a schematic vertical section through an embodiment of a control arrangement according to the invention, which is attached to a glass ceramic plate of a stove with glass ceramic hob and

Fig. 2

2 shows a schematic top view of the devices of the control arrangement from FIG. 1 arranged below the glass ceramic plate.

The schematic vertical section in FIG. 1 shows a control arrangement 1 for controlling an electric cooker, its top or work surface by a horizontal Glass ceramic plate 2 is defined, the one or have several hotplates spaced from each other can. The intended for the individual hotplates, in particular are designed as radiant heaters arranged on the inside or underside 3 of the plate and give their radiant heat through the plate to the other Outside or top 4 from, placed on the cooking vessels can be. At the top of a separate Surrounded frame, consistently flat and costly thick Plates are in a row adjacent to or next to each other arranged several manually operated controls, with which the individual heaters are independent of each other manually controlled, e.g. switched on and off as well as adjusted to different operating performances can be. The control element 5 shown in section is one of, for example, four to ten between the Hobs and an outer edge of the plate immediately adjacent to each other in a row parallel to the outer edge arranged controls.

The control element 5 has the shape of a square truncated pyramid and is at a height that is about twice the Thickness of the glass ceramic plate 3 corresponds, compared to common knobs very flat. The flat, square Top 6 and the parallel, square, flat underside 7, the entire surface on the top of the plate 4 rests, are connected via lateral inclined surfaces 8, 9, the outside of which is easily profiled, for example can be ribbed or nubbed. The very simple structure Control element 5 consists essentially of two parts, namely a rectangular recess at the bottom Plastic body 10 and one in the rectangular recess cuboid permanent magnets 11, which is flush with the bottom 7 of the body 10. The top of the plate 4 is free of projections or depressions, which is a mechanical guide or movement limitation parallel to the surface of the freely movable plate Control element 5 could cause. The magnet 11 is like this aligned that its magnetic north pole of the bottom 7 or, when the actuating element is attached, the plate 2 and its inner magnetic field leading to the South Pole essentially perpendicular to the underside 7 or plate 2 is aligned. It can be a permanent magnet with high coercive field strength, for example around an iron-neodymium-boron permanent magnet act.

Below the glass ceramic plate 2 is in a hermetically through these and other parts, not shown enclosed space one directly at the bottom 3 of the Magnetic plate, also clearly visible in FIG. 2 Holding device 15 with several each cuboid Permanent magnets 16 to 20. These create a permanent one magnetic force field or magnetic field that is so strong that the overlying slide 5 with lateral pressure on the inclined surfaces 8 or 9 parallel to the plate surface limited relatively easy to move, but a Lift off the control element from the plate surface to Overcoming the magnetic attraction between Holding device 15 and control element 5 a conscious Operator effort required.

2 that the holding device 15 a first formed by the cuboid magnet 16 or inner magnet arrangement, the polarity of attached control element in the same direction as the polarity of the Control element magnet 11 is aligned so that over the north pole of the control element magnet 11 and the south pole of the central holding magnet 16 with one of the Plate thickness opposite the corresponding minimum distance. This creates a high holding force in the central area. Around the central magnet 16 by four similar, directly abutting cuboid permanent magnets 17 to 20 an outer, second magnet arrangement in the form of a inner magnet 16 completely enclosing rectangular ring arranged. The magnets 16 to 20 of the holding device are attached to the top of a circuit board 21, which at the assembly of the device in this way below the glass ceramic plate is attached that the magnets with their planes Top surfaces pressed flat on the underside of the plate 3 become.

The outer magnets have one of the central magnets 16 radial distance parallel to the plate approximately in the order of magnitude the plate thickness or from a few millimeters to a few Centimeters, and the outer magnets have one to the inner one Magnets 16 opposite polarity, with their north poles are directed to the underside of the plate 3. The central one Longitudinal axis 22 and the central transverse axis 23 mirror-symmetrical Magnet arrangement of the holding device 15 generates a characterized by the dashed field lines, with respect to an axis of rotation running perpendicular to the plate 2 two-fold rotationally symmetrical magnetic field with two perpendicular standing on each other, defined by the mirror planes Preferred directions between the inner south pole and an outer north pole.

In the embodiment shown is for detecting the position and / or a change in position of the control element 5 a Sensor device 25 with two Hall sensors 26, 27 provided, to an evaluation carried by the circuit board 21 Control circuit are connected and in the installed state in the immediate vicinity of the underside 3 of the glass ceramic plate are arranged. The magnetic field sensitive Hall sensors 26, 27 are each on the central longitudinal axis or mirror axis 22 of the holding device 15 approximately in the middle between the central one Holding magnet 16 and the narrow-side outer magnet 17 or 18 arranged and thereby lie in one of the magnetic field Holding device only weak and parallel to the surface area area of the Hall sensor. They are in the Effective range of that generated by the control element magnet 11 Magnetic field that penetrates the area of the Hall sensors at an angle and in the central position shown in Fig. 1 or Rest position of the control element 5 at the location of both Hall sensors 26, 27 is essentially the same strength.

The centrally arranged magnet 16 has a square shape essentially a non-contact through the plate 2 through acting on the magnet 11 of the control element 5 Holding and centering function through which the slide 5 Absence of external displacement forces in that shown in FIG. 1 Center position or rest position is held. The um the central magnet 16 arranged further rectangular magnets On the one hand, 17 to 20 support the centering function by the north-facing poles facing the plates are symmetrically repulsive centering on the north pole of the control element magnet 11 Act. The magnets of the outer magnet arrangement serve essentially a non-contact, magnetic guidance of the control element 5 and its automatic reset after releasing the button, whereby the restoring force is also non-contact due to the magnetic permeable plate 2 is conveyed magnetically. Resetting forces occur when the slide 5 is moved in all four perpendicular to the side edges of the outer Magnet arrangement standing directions of displacement. There however, the external magnets arranged on the longer sides 19, 20 are significantly closer to the central magnet 16 than that the shorter sides arranged magnets 17, 18 takes the Restoring force in the direction of displacement perpendicular to the longer one Mirror plane 22 significantly more than parallel to Mirror plane 22. The elongated parallel to this direction Rectangular arrangement thus creates a magnetic Guide trough or a guide groove, starting from the rest position over the central magnet 16 shifts parallel to the longer game axis 22, ie in the direction of a the Hall sensors 26, 27 are relatively easily possible while Shifts across this direction magnetically strong is counteracted.

The magnetic holding device 25 therefore not only fulfills a holding function that controls 5 against accidental Lifting or falling off secures and on the top of the plate holds, but also the function of a side guide, the one shift essentially only in two counter-parallel directions 28 and 29 parallel to plane 22 allows. Furthermore, an automatic provision in the centric rest position. With the two Hall sensors 26, 27 the displacement movement of the shift button 5 in the direction of displacement 28 or the counterparallel to it Direction of displacement 29 can be detected.

If the slide 5 is moved in the direction 28, for example, so both Hall sensors will change the magnetic Detect field strength, this in the area of sensor 26 increases and decreases in the area of the sensor 27. The magnetic field changes, which are primarily changes to the Hall voltage can affect the connected Control device converted into electrical impulses and by subsequent electronics converted into switching impulses become. The Hall sensors are preferably the digital ones Deliver output signals so that, for example, a a predeterminable voltage value corresponds to a logic high level or a logic high level, while falling below the threshold a low logic level or a logic low level assigned. The corresponding levels or signals can a logical link unit of the control device are supplied from the sensors 26, 27 associated with prevailing magnetic conditions Derives switching signals. The interpretation can be such that at mounted slide element 5 in its rest position both Sensors 26, 27 due to the essentially identical magnetic field strength provide a logical high level from which the Linking logic the presence of a control button in Rest position closes and the electrical device in a standby state or standby state switches in the basic functions are activated. By moving the slide button or button 5, for example in the direction of displacement 28 the magnetic flux in the area of the no more or Hall sensor only slightly influenced by the magnet 11 27 so low that it drops and a logic low level supplies. The connected link unit leads out the input values of the two sensors 26, 27 of the displacement switching signal assigned in the direction of displacement 28 from which, for example, a certain parboil rate the assigned hob is set. Becomes the slide button 5 is shifted so far in the direction of displacement 28, that the control element magnet 11 is different from the central magnet 16 far away and approaching the outer magnet 17, so cause the magnetic attraction of the central magnet in the Interaction with the repulsive forces acting in the same direction of the outer magnet 17 clearly from the user perceptible displacement resistance, which the completion of the Keying process. If a user then pushes the slider lets go, this turns to minimize the magnetic Field energy automatically into that shown in Fig. 1 Rest position. A corresponding touch operation can be done in the opposite direction of displacement 29 performed , the high level caused thereby at the Hall sensor 27 in conjunction with the low level on the Hall sensor 26 one of the Displacement direction 29 associated switching function causes. If there is no slider on the system, for example because it is to protect against unauthorized use of the plate has been removed, both Hall sensors 26, 27 deliver a logical due to the low magnetic field strength Low level back. The logic logic can from this a control signal for a stable off state cause the general by removing the control established.

It can be seen that only one per direction of displacement only sensor is sufficient for the present two A total of four different directions of displacement Select states by pressing button 5 appropriately, namely those assigned to each of the directions of displacement Functions and those assigned to the rest position Standby function and the absence of the control element assigned off function.

One skilled in the art will readily recognize that a uniaxial bidirectional slide switch by suitable arrangement other sensors, for example between the central magnet 16 and the long side magnets 19, 20 on the short one Mirror plane 23 of the arrangement 15 can lie at one two-axis bidirectional slide switch in the manner of a Joysticks can be expanded. Alternatively or additionally Hall sensors can also use other magnetic field sensitive Sensors such as reed contacts, coils or the like can be provided. Also non-magnetic sensors, for example capacitive or inductive sensors are possible.

Depending on the design of the control device, Such push buttons have many convenient switching options realize that can be used if necessary. So are with the the exemplary embodiment described the magnetic field strengths, the sensors and suitable thresholds in the evaluation electronics adjusted so that with a tax effective shift in one of the directions of displacement 28, 29 when exceeded of a lower threshold a single control signal is generated, regardless of the actual displacement. Through evaluation electronics with a clock and a counter it is also possible with a tax effective Shift the holding time in the deflected state determine and depending on the holding time a corresponding Generate control signal. Here, e.g. one Direction of shift one up and the opposite Downward direction. counts can be displayed optically and / or acoustically to help an operator achieve the desired Switch function or the like. It is also possible that Design circuit so that a desired control signal or a switching state corresponding to this by a Predeterminable number of discrete tax-effective shifts is effected so that, for example, the grill function of a Oven over a certain number, for example three short successive shifts can be adjustable can. Basically, the invention also allows that for example a control signal depending on one Displacement of the control element is generated. For this can possibly have several along one direction of displacement Sensors can be arranged with increasing displacement gradually effective from the magnetic field of the slide 5 can be detected.

Slide buttons or pulse buttons of the type mentioned can in Range of electric cooking appliances, for example, preferably gradual setting of temperature values and / or used for operating mode selection in oven controls become. In the case of a hotplate control, for example also the preselection of a performance level or one free selectable heating / heating time possible. With a biaxial Button can e.g. a second setting via an axis and A temperature setting is made via another axis become. For the rest, the invention is not limited to use limited to cooking appliances with glass ceramic plates. So can non-contact actuators on any, magnetically inactive, horizontal, vertical or inclined housing walls of a device magnetically held become.

Claims (16)

1. Arrangement for the control of electrically controllable appliances, particularly electric cookers, having at least one control element arranged or arrangeable on an outside of a plate, a holding device associated with said control element for holding the control element an the plate and a sensor device for cooperating with a control device and serving to determine the position and/or position change of the control element, wherein at least one control element (5) is constructed as a slider automatically returning to a rest position and which is displaceable in at least one displacement direction (28, 29) along the plate (2).
2. Arrangement according to claim 1, wherein, starting from the rest position, the control element (5) is controlling displaceable in at least two different displacement directions (28, 29) for generating at least two different control signals, preferably starting from the rest position, the control element is controlling displaceable in two antiparallel displacement directions (28, 29) and/or in four displacement directions oriented at right angles to one another.
3. Arrangement according to claim 1 or 2, wherein the sensor device (25) cooperates with the control device in such a way that there is a controlling displacement only when a minimum displacement range in the displacement direction is exceeded.
4. Arrangement according to one of the preceding claims, wherein the sensor device (25) cooperates with the control device in such a way that in the case of a controlling displacement a single control signal can be generated independently of the displacement range.
5. Arrangement according to one of the preceding claims, wherein the sensor device cooperates with the control device in such a way that in the case of a controlling displacement a plurality of control signals can be generated as a function of a holding period in the displaced state.
6. Arrangement according to one of the preceding claims, wherein the sensor device cooperates with the control device in such a way that a control signal can be generated as a function of a number of briefly succeeding controlling displacements in one displacement direction.
7. Arrangement according to one of the preceding claims, wherein the sensor device (25) cooperates with the control device in such a way that an removing the control element (5) from the plate (2) the appliance is switched into a stable off state.
8. Arrangement according to one of the preceding claims, wherein the sensor device (25) cooperates with the control device in such a way that when the control element (5) is in the rest position the appliance is switched into a standby state differing from the off state.
9. Arrangement according to one of the preceding claims, wherein the sensor device (25) incorporates at least two sensors (26, 27) constructed for emitting sensor signals and wherein the control device has at least one logical interconnection unit for the logical interconnection of the sensor signals or signals derived from the sensor signals.
10. Arrangement according to one of the preceding claims, wherein the sensor device (25) has at least one sensor (26, 27) located an the inside (3) of the plate (2) and which responds to a change of a preferably magnetic field acting through the plate and brought about by the actuation of the control element (5), and/or wherein the sensor device (25) has at least one magnetic field-sensitive sensor, particularly at least one Hall sensor (26, 27), which is preferably placed or placeable in the working range of a magnet (11 ) of the control element.
11. Arrangement according to one of the preceding claims, wherein only one sensor (26, 27) is provided for each displacement direction (28, 29).
12. Arrangement according to one of the preceding claims, wherein the holding device (15) is placed an the inside (3) of the plate (2) opposite to the control element (5), and/or wherein the holding device (15) is constructed as a device for producing a preferably magnetic field of force, which acts in non-contacting manner an the control element and preferably the control element (5) is held an the plate (2) exclusively by the force of the field of force.
13. Arrangement according to one of the preceding claims, wherein the control element (5) is removable from the plate (2) without the aid of tools.
14. Arrangement according to one of the preceding claims, wherein the holding device (15) has at least one holding magnet and the control element at least one magnet (11) placeable in the working range of the holding magnet (16).
15. Arrangement according to one of the preceding claims, wherein the holding device (15) is constructed for producing a multi-fold, rotationally symmetrical magnetic field, preferably the magnetic field has a two or fourfold rotational symmetry, and/or the holding device has a first magnet arrangement (16) with a plate-facing magnetic pole and spaced therefrom a second magnet arrangement (17, 18, 19, 20) of opposite polarity, preferably a second magnet arrangement (17, 18, 19, 20) is ring-like and/or rectangular and is arranged with a radial spacing around an inner, first magnet arrangement (16).
16. Arrangement according to one of the preceding claims, wherein there is an exclusively non-contacting guidance device for guiding the control element (5) along the displacement direction (28, 29) and preferably the guidance device is formed by the holding device (15).

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