EP2421016A1 - Control unit and control method - Google Patents

Abstract

The operating device (11) has a rotary knob (13) including an OFF state in which the operating device is disabled, and working state for function setting of heating device. The rotary knob is set in working state by rotating the knob to working angle range in rotational direction. A turning angle detector is connected to control unit of operating device for detecting the rotation angle of the knob. An independent claim is included for control method of operating device.

Description

Field of application and state of the art

The invention relates to an operating device for setting the function of a heating device, in particular for power adjustment, wherein it has a rotary knob with an off position and a working position. Furthermore, the invention relates to an operating method for such an operating device.

It is for example from the DE-A-2105638 known to form a rotary knob with multiple rotational positions for power adjustment of a heater. The power adjustment takes place only by a rotation.

From the US-A-4,713,502 It is known that a corresponding operating device with a rotary knob in an off position can not be rotated. The rotary knob must be pulled out or pushed in, starting from the off position, in order to be brought into a working position in which it can then be turned to adjust the power of a heating device. Such solutions, in particular when first the rotary knob must be pressed for subsequent actuation, are now widely used in the meantime. In this working position, a large range of rotation can then be provided, for example 270 °, wherein the range of rotation is subdivided into individual stages or power levels, alternatively also into different functions in an oven selector switch. This rotation angle range is due to the fact that a certain angle range around the zero position is omitted from a full circle angle, since here the rotary knob can be brought from the working position to the off position and vice versa.

Task and solution

The invention has for its object to provide an aforementioned control device and a corresponding operating method with which problems of the prior art can be achieved and in particular the possibility is created that an operating device can be operated in a new way.

This object is achieved by an operating device with the features of claim 1 and an operating method with the features of claim 12. Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below. Some of the features mentioned below are only described for the operating device or only for the operating method. However, they should be able to apply regardless of both the operating device as well as for the operating method. The wording of the claims is incorporated herein by express reference.

It is envisaged that the rotary knob is deactivated in an off position or can not be rotated at all. From this off position, it can be brought into a working position to make a functional adjustment of the heater, in particular to change their performance. According to the invention it is provided that the working position by a detent or the like. is predetermined, ie by a mechanical device that automatically adjusts the working position or tries to turn back the rotary knob in this working position. The working position is advantageous a stable intermediate position. The rotary knob is rotatable starting from this working position in at least one direction of rotation over a working rotation angle range, namely against a rising with increasing rotation angle counterforce. Furthermore, the operating device has a rotation angle detection for detecting the rotation angle. This rotation angle detection is with a Control of the operating device connected to the function setting. The control is advantageously designed such that with increasing rotation angle, the function setting, especially as power setting of the heater, faster or changes faster. This can be achieved in the operating method, on the one hand given a kind of zero position in the working position and from this starting a rotation at least in one direction, advantageously also in the other direction, each one setting the function causes. This is preferably a power increase in one direction and a power reduction in the other direction of rotation. By dividing into the off position and the working position, a safeguard against unintentional actuation can be achieved, in particular as a child safety device.

It should be noted that in alternative embodiments of the invention can be dispensed with as a modification to the off position and this is therefore only optional. If, for example, no child safety device is desired, the working position can form the only position or basic position for the rotary knob of the operating device.

By a possible dependence of the speed of change of the function setting or power setting of the rotation angle, it is possible to keep the range of the working rotation angle relatively small. So it can advantageously be less than 45 ° starting from the working position, particularly advantageously between 10 ° and 30 °. Furthermore, it is provided that the control adjusts or alters the function of the heating device not only as a function of the angle of rotation, but rather, while simultaneously taking the temporal component into account, for how long or for what time a specific angle of rotation is set or held , The size of the rotation angle is advantageously correlated directly with the size of the rate of change, so that at a larger angle of rotation results in a faster function setting than at a smaller angle of rotation. In this case, an acceleration of the function setting can on the one hand take place approximately linearly with increasing angle of rotation. On the other hand, it can even be disproportionately high for a particularly fast function setting or power setting at a relatively large angle of rotation.

Instead of the dependence of the speed of change of the function setting or power setting of the rotation angle can be provided that takes place by multiple rotary motion with a very small angle of rotation in the same direction, the function setting such as increasing or decreasing the power setting. This is advantageously carried out by an unstable intermediate position of the operating device. Alternatively, it can also be done from the working position. In particular, the small angle of rotation is about 3 ° to 15 °. It may be limited in an embodiment of the invention by a rotation stop, which can also be overcome if a certain torque is exceeded. It can be achieved, for example, that the power is increased or reduced by one level with each small rotational movement. This is also called toggle and is a proven and simple as well as intuitively understandable method for function setting or power adjustment.

In a further advantageous embodiment of the invention, it is provided that the rotary knob is rotatable from the working position in its directions of rotation in each case against a counterforce. In this case, the counterforce is advantageously designed so that it is approximately the same size in both directions of rotation or is correlated in the same way with the rotation angle. But it can also be greater in one direction of rotation than in the other, for example, be greater in performance increase than power reduction.

Small working rotation angle ranges have the advantage that a relatively small hand movement is sufficient for operation. Then this movement has to be maintained for a long time, until, so to speak by automatic driving through or start-up or shut down by several power levels a desired setting has been made.

In a further embodiment of the invention, a counter-force device for the counterforce can be designed according to the cam principle or have such a cam. For this purpose, it may have a radially extending inwardly projecting cam member, which abuts at least within the working rotational angle range on a grinding slot for the cam member. This grinding link extends from the working position in the direction of the locking part to and laterally away, is therefore advantageous so curved. In this case, the cam member is formed pressed against a cam spring in the radial direction to avoid depending on the shape of the grinding slide. This movement of the cam member against a cam spring causes by means of the grinding backdrop that both the rotation of the rotary knob per se and the maintenance of the angle of rotation requires a certain force. This force is desired as feedback for the operation. It is advantageously provided that the cam member is rotatably formed, so does not rotate, but only in the radial direction can be moved to a grinding backdrop on the rotary knob.

Alternatively, the cam member may also be in the radial direction outwardly and bear against the inside of a grinding backdrop, which is then outwardly bulged for the cam member. The cam member is then provided on the rotor. As yet another alternative to a cam member in the radial direction, so to speak, on the outer edge of a rotor or a disc, can also be provided that a cam rests against an upper side or lower side of the rotor. Then just here the grinding scenery is provided, which is not a problem.

The grinding slide is particularly advantageously formed symmetrically to a line along the radial direction of the cam member on the axis of rotation to, so that an opposing force is formed equal, regardless of the direction of rotation. But it is also well conceivable to form the counterforce in one direction greater than in the other, as mentioned above. This is also the case with the aforementioned alternative on top or bottom of the rotor

As an alternative to an opposing force device with a cam part and grinding slide, a tension or compression spring can be provided to generate the counterforce. This can be acted upon with increasing angle of rotation from the working position with increasing force, so that then the counterforce also increases. A possible desired non-linear increase in the counterforce can be achieved in that the spring force is not necessarily in the direction perpendicular to the radial direction, for example, by a spring to the axis of rotation of the rotary knob or away from the axis of rotation, as is easily conceivable for the expert , Thus, a degressive or progressive change in the spring force can be achieved.

For practicable and yet haptic easily recognizable operation, a counterforce in the range of 0.1Ncm to several Ncm, for example, about 1 Ncm. This creates a clearly noticeable counterforce that can be overcome at the same time without major problems during operation.

In an advantageous embodiment of the invention may be provided for detecting a rotation of the rotary knob according to the magnetic principle, a magnet and two magnetic sensors. In this case, the magnet is advantageously designed to be rotatable, in particular attached to the rotary knob, while the two magnetic field sensors are stationary. As a result, among other things, the control of the magnetic field sensors, which may be Hall sensors in particular, easier.

To move from the above-described off position to the working position, it may be provided that the operating device or the rotary knob must be pressed. In the depressed state, the rotary knob must then be slightly rotated so as to remain in the working position. Alternatively it can be provided that after pressing the working position is held or the rotary knob is not pushed out again. Only by a renewed pressing it comes out again and thus automatically enters the off position. Such latching solutions are also known to the person skilled in the art, for example so-called countersunk knobs.

Detection of the movement from the off position to the working position can take place in that a magnet is embedded in the end face of the axle. This magnet opposite to the control device, a magnetic field sensor is arranged, which detects the previously described approach when pressing the rotary knob and so as a sign of an equal succession control or the like. turns.

These and other features will become apparent from the claims and from the description and drawings, wherein the individual features each alone or more in the form of sub-combinations in an embodiment of the invention and in other fields be realized and advantageous and protectable Represent embodiments for which protection is claimed here. The subdivision of the application into individual sections as well as intermediate headings does not restrict the general validity of the statements made thereunder.

Brief description of the drawings

Fig. 1

eine Schnittdarstellung durch eine erste erfindungsgemäße Bedieneinrichtung in der Aus-Position,

Fig. 2

eine Schnittdarstellung ähnlich Fig. 1 in der Arbeits-Position nach Eindrücken,

Fig. 3

eine Draufsicht auf die Bedieneinrichtung entsprechend der Fig.1 und 2 mit funktioneller Darstellung,

Fig. 4

eine Schnittdarstellung ähnlich Fig. 1 durch eine zweite erfindungsgemäße Bedieneinrichtung in der Aus-Position,

Fig. 5

eine Schnittdarstellung gemäß B - B von Fig. 4 und

Fig. 6 bis 9

sogenannte Funktionsdiagramme bzw. Abwicklungen der Außenkontur des sich drehenden Rotors entsprechend Fig. 5 und einer weiteren Ausgestaltung.

Embodiments of the invention are shown schematically in the drawings and are explained in more detail below. In the drawings show:

Fig. 1

a sectional view through a first operating device according to the invention in the off position,

Fig. 2

a sectional view similar Fig. 1 in the working position after pushing in,

Fig. 3

a plan view of the operating device according to the Fig.1 and 2 with functional representation,

Fig. 4

a sectional view similar Fig. 1 by a second operating device according to the invention in the off position,

Fig. 5

a sectional view according to B - B of Fig. 4 and

Fig. 6 to 9

So-called function diagrams or developments of the outer contour of the rotating rotor accordingly Fig. 5 and a further embodiment.

Detailed description of the embodiments

In Fig. 1 an operating device 11 according to the invention is shown in side section with a rotary knob 13 in front of a control panel 15 of the operating device 11. The rotary knob 13 is designed to control a sensor 17 and sits on a rotation axis 18 which pierces the control panel 15 and has a rotor 16 which is mounted in a counter-force device 19 or can rotate against it.

The counterforce device 19 has a fixed support plate 20 which is mounted, for example, on the back of the control panel 15. The support plate 20 has a cam-like locking part or cam part 21, which also in the plan view Fig. 3 to recognize and explained in more detail there. Furthermore, the counter force device 19 a latching opening 22, which also out Fig. 3 is better to see, on the outer peripheral edge.

On the support plate 20, a said sensor 17 in the form of two magnetic sensors 29a and 29b fixed, their arrangement and position relative to each other again from Fig. 3 can be seen. In the counter-force device 19, which may be formed in the manner of a thick disc, a magnet 28 is arranged, which moves with the rotation of the counter-force device 19 according to the rotary knob 13.

In Fig. 1 is provided between the bottom of the counter-force device 19 and the top of the support plate 20, a greater distance. This serves as the Fig. 2 shows that with pressing on the rotary knob 13 via the axis of rotation 18, the counter-force device 19 is pressed to the support plate 20 and possibly rests on it. For a better explanation here on the same time Fig. 3 directed. The pressing on the rotary knob 13 is namely only in the in Fig. 1 shown position possible when the latching opening 22, the in Fig. 3 facing down, exactly at the locking part 21 rests. Only then can namely the counter-force device 19 is pressed into and pressed onto the support plate 20 to the in Fig. 2 to achieve the illustrated state.

Thus, so in Fig. 1 the off position is shown and in the FIGS. 2 and 3 the working position. In the plan view of the counterforce device 19 according to Fig. 3 It can be seen that the latching opening 22 has to the left to a bevel 22 ', which slowly expires on the diameter of the counter-force device 19. So while according to Fig. 1 the cam-like locking part 21 rests in the latching opening 22, it is according to the working position Fig. 3 has been pressed and turned 90 ° counterclockwise. In this case, the locking part 21 is then in the grinding gate 24, as shown. The grinding slide 24 points from a central recess 26 on both sides up and down obliquely expiring backdrop cheeks 25a and 25b. The angle range α formed by the extent of the guide cheeks 25a and 25b is about 60 °, but may be larger or smaller. It can be seen that the latching part 21, which is loaded to the left with a detent spring and is thus pressed to the center of the counter-force device 19, so abuts the sliding cheek 24 on the sliding cheeks 25a and 25b, that the position according to Fig. 3 set by itself. When turning the counter-force device 19 by means of rotary knob 13 and pivot axis 18, the locking member 21 is pressed by the slope of the sliding cheeks 25 a or 25 b to the left against the spring, which complicates the rotational movement and a provision in the in Fig. 3 shown zero position causes. At the same time, any rotation, even at low angles, at which the magnet 28 rotates, can be detected by means of the magnetic sensors 29a and 29b, which detect relative to each other the signal 28 triggered by the magnet. Due to the configuration of the sliding cheeks 25a and 25b or their slope, the increasing with increasing rotation angle from the zero position out counterforce acting on the rotary knob 13 can be adjusted, of course, in cooperation with the strength of the spring behind the locking part 21st If the sliding movement of the locking member 21 has little friction on the grinding slide 24, which is possible by appropriate plastic materials and fats, the rotary knob 13 must be rotated only against the opposing force.

At the top, the rotational angle range above the sliding cheek 25a is limited by a projecting stop 31. This means that overrunning in this direction is not possible. An overspeeding in the other direction, ie beyond the sliding cheek 25b out, after a little further rotation with the result that the locking opening 22 again comes to rest on the locking part 21 and then the counterforce device 19 again by springs, not shown, or the like. is pushed away from the support plate 20 in the position according to Fig. 1 ,

Instead of the opposing force device 19 shown here with locking part 21 and grinding gate 24 and the arrangement of several springs is conceivable, namely pressure or tension springs against which acts from a zero position, for example, the stopper 31. It would even be possible to use a single spring, if this has an approximately equal power development both on pressure and on train. With different power development and the aforementioned different reaction force, which may be different depending on the direction of rotation can be achieved.

From the Fig. 3 It can be seen that with increasing rotation of the counterforce device 19 from the illustrated zero position out the force required for turning increases, and disproportionately. This can be connected, for example, with a power setting with the operating device 11 for a heating device, for example in the case of a gas hob. The longer, for example, a deflection out of the zero position is held out with pressed-in locking part 21, the longer a power level is changed up or down. The further you turn, ie the larger the angle of rotation, the more the rate of change increases. Thus, a slow power adjustment or counting of power levels can be done with relatively little torque. So a very accurate setting is possible. Alternatively, by stronger or further rotation of the rotary knob 13 with a larger angle of rotation from the zero position out against a greater drag of this power adjustment or counting the power levels done much faster. This is especially beneficial if a high power level is desired and should be adjusted, especially if it is to be set quickly.

The illustrated operating device 11 also has the safety function that only signals are generated via the rotational position of the magnetic sensors 29a and 29b when the magnet 28 is opposite them. Leaves the locking member 21, the grinding gate 24, because it is pushed up, for example, by spring force, the magnet 28 is so far away from the magnetic sensors 29a and 29b that they no longer or only weakly respond. This can recognize the operating device 11 as switching off.

As mentioned above, the locking part 21 and the grinding slide 24 can be inverted or rotated from inside to outside, so to speak. Then the grinding slide is fixed and surrounds the rotor, which has the outwardly facing locking part. The central recess 26 inwardly would then correspond to an outward bulge.

In Fig. 4 is similar in a section Fig. 1 another operating device 11 shown in a less schematic, but rather concrete representation. The operating device 111 has an axis of rotation 118, which can be pressed against a spring force in a rotary axis disc 133 for coupling and the subsequent rotation. The rotation axis 118 is released from the Verrastungskulisse in the housing 120. The design of this rotary disk 133 can also from the sectional view according to section B - B from Fig. 5 be seen, and this will be explained in more detail below.

Below the axis of rotation 118 or the rotary axis disc 133, there is a rotor 116 similar to that described above, with the rotary axis disc 133 and the rotor 116 not necessarily being in operative connection or connected to one another. The rotor has a central chamber 135 into which the rotary axis disc 133 can engage at pressures on the axis of rotation 118. For a torque transmitting connection as well as for a special fit only in a single position, the in Fig. 5 recognizable projections 134a and 134b provided on the rotor 116, which project into the chamber 135. The rotary axis disc 133 has corresponding recesses into which the projections 134a and 134b engage in the appropriate position. Then, the rotation axis 118 is operatively connected to the rotor 116 and can rotate it. On the rotor 116 in turn an externally acting counterforce device 119 is provided with a latching part 121 which is pressed into a latching opening 122 in the rotor 116 by a coil spring. Furthermore, the rotor at the latching opening 122 has a bevel 122 ', on which, when turned counterclockwise to the left, the latching part 121 is pressed adjacently outwards. After a rotation angle of about 90 °, the latching part 121 comes to engage in a grinding slide 124. The grinding slide 124 has two sliding cheeks 125a and 125b and a recess 126. Die Kulisseschange 125a und 125b sind in der Zeichnung dargestellt. On the outer areas of the guide cheeks 125a and 125b stop flats 127a and 127b can be seen, which gives the user a kind of locking feeling when turning in such a way that the detent 121 abuts against them or a kind of exact, but unstable intermediate position, yet in both directions can be further rotated. It can also be achieved that by reaching the right stop flattening 127a, the latching part 121 slides back into the stable intermediate position in the middle of the guide cheeks 125a and 125b.

In the rotor 116, in turn, a magnet 128a is mounted, which forms a sensor 117 together with two magnetic sensors 129a and 129b. Since the magnet 128a lies exactly opposite the grinding slide 124 together with the recess 126, it is located at a rotation angle of 90 ° exactly between the two magnetic sensors 129a and 129b. Now, as described above, the rotor 116 by means of the engaging rotary shaft disc 133 and the turntable 118 a piece to the left or a piece to the right, preferably so far that the locking member 121 abuts the Anschlagabflachungen 127a and 127b, so there is the magnet 128a directly in front of one or the other magnetic sensor 129. As a result, these positions can be used for a signal detection and evaluation described above.

Furthermore, it can be provided that the magnet 128a when rotating the rotor disk 116 from the position according to FIG Fig. 5 to the left past the lower magnetic sensor 129a first. This can be recognized as a so-called wake-up area and cause, for example, a power-up of a controller, which until then was in a kind of standby mode with minimal power supply. Another function could be, for example, when controlling a gas stove with electronic control igniting a gas burner, the power is then set in power levels. This ensures in all cases that the ignition device is activated when a gas valve is opened by the subsequent adjustment.

As an alternative detection, for example for igniting on a gas burner, a further magnet 128b and a further magnetic sensor 129c may be provided. These are twisted by an angle of about 45 °, as seen from Fig. 5 can be seen. After a rotation angle of about 45 ° detects the magnetic sensor 129c this rotation and can already ignite a gas burner, while the power can be adjusted for the gas burner after the angle of rotation of about 90 °. These 45 ° are then a so-called wake-up area. At this time, the magnet 128b is arranged so as not to disturb the magnetic sensors 129a and 129b.

If increased safety conditions are imposed on this wake-up area, then a further sensor, for example a magnetic field contact or a reed switch, can be provided. These interact with a corresponding magnet.

The direction of rotation in the FIGS. 4 and 5 could also be the other way around by corresponding mirrored training, so right around.

In Fig. 6 is shown schematically in a kind of functional diagram, which profile has the rotor disk 116 over a rotational angle course. At the position 0 °, which is the representation in Fig. 5 corresponds, the latching opening 122 is provided. With increasing rotation angle comes first at 45 °, the above-described wake-up area, namely, when the magnetic sensor 129a registers the magnet 128a in the position in front of him. At about 70 ° begins with a Anschlagabflachung 127b, the grinding gate 124 of the recess 126, which in turn is exactly 90 °. At about 110, the other stopper flat 127a is located.

Starting from this angular position of about 110 °, the rotor disk 116 can be rotated further to the left, which, however, has no effect, since the magnet 128a is located outside the magnetic sensors 129a and 129b. It can also be provided a stop.

In a further embodiment of a function diagram according to Fig. 7 in a modification of the rotor disk 116 can be seen that in the position 0 ° again a zero position is provided. However, on this basis, unlike according to the 4 to 6 , the rotor disk 116 are also rotated to the right, up to about 45 °. There is then again a stop provided with a corresponding detent opening, beyond which a turning is not possible. A detection of this rotational position at minus 45 ° could for example be done by another magnet, which would be arranged in a rotor. He would, for example, the rotor 116 according to Fig. 5 Seen approximately between the grinding gate 124 and the upper magnetic sensor 129b arranged so that it is near the rotation of the rotor 116 to the right or the magnetic sensor 129b opposite, which can then be recognized accordingly.

Furthermore, in the illustration in Fig. 7 provided at the angle of 45 ° not only a prescribed wake-up, but by a further depression in the outside of a rotor, a mechanical tactile special function. This can be moved as desired, for example, a cooking process with a fixed power or the like ..

A grinding scenery similar to the 4 to 6 with two sliding cheeks and Anschlagabflachungen outside is provided at the position of about 120 °. The rotor must therefore be turned a bit further than in the design according to Fig. 6 ,

Further modifications are possible and based on the 6 and 7 easy to imagine. For example, at an angle greater than 90 ° in a modification of Fig. 6 another stop be realized by a detent opening to prevent further rotation, with such a stop then also a special function can be assigned. This then corresponds to the stop at 0 °, just mirrored. Such a representation would then be mirror-symmetrical to the center, whereby this center could then also be associated with the angle of rotation of 0 °. This is in Fig. 8 shown.

In Fig. 9 is a further modification of Fig. 6 shown. Here, the stop has moved from the 0 ° position to the left to a position about 135 °. At position 0 ° is now a kind of one-sided rocker area. It is designed in the manner of a halved rocker with a link cheek to the right to the position -15 °. Here, a setting can be done by rocking or the aforementioned toggle by small turns or movements to the right. Again right of it is then directly a stop against further twisting.

Furthermore, in the illustration according to Fig. 7 the special function formed by the recess at 45 ° and the grinding gate at 120 ° be reversed. Furthermore, here at one point at an angle slightly more than 0 ° again a wake-up area corresponding Fig. 6 be provided.

Claims (15)

Operating device for setting the function of a heating device, with a rotary knob, wherein the operating device is designed so that the rotary knob has an off position in which the operating device is deactivated, and that it can be brought into a working position for setting the function, characterized in that the working position by a detent or the like. is predetermined and the rotary knob from the working position, starting in at least one direction of rotation over a working rotation angle range is rotatable against increasing with increasing rotation angle counterforce, wherein the operating device has a rotation angle detection for detecting the rotation angle, which is connected to a control of the operating device function setting. Operating device according to claim 1, characterized in that the control is designed so that with increasing rotation angle, the function setting is faster or changes faster. Operating device according to claim 1, characterized in that by multiple rotational movement with a small angle of rotation in the same direction a function setting such as increasing or decreasing a power setting takes place, preferably from an unstable intermediate position of the operating device. Operating device according to claim 1, characterized in that the rotary knob is rotatable from the working position in both directions of rotation against in each case a counterforce, wherein preferably the counterforce is identical in both directions of rotation. Operating device according to claim 1 or 2, characterized in that the working rotation angle range starting from the working position is less than 45 °, preferably between 10 ° and 30 °. Operating device according to one of the preceding claims, characterized in that a counter-force device is formed according to the cam principle with a radially extending projecting cam member which abuts at least within the working rotation angle range on a grinding backdrop for the cam member, which starting from the working position in the direction of the locking part to and extends laterally away therefrom, wherein the cam member is formed against a cam spring in the radial direction pressed. Operating device according to claim 6, characterized in that the cam member is rotationally fixed and is movable only in the radial direction on a grinding slide on the rotary knob, wherein preferably the grinding slide is formed symmetrically to a line along the radial direction of the cam member on the axis of rotation. Operating device according to one of claims 1 to 5, characterized in that a counter-force device for generating the opposing force comprises a spring which is acted upon by increasing the rotational angle of the working position with increasing force for exerting the increasing counterforce. Operating device according to one of the preceding claims, characterized in that the counterforce in the range of a few Ncm, preferably about 1 Ncm, is located. Operating device according to one of the preceding claims, characterized in that for detecting a rotation of the rotary knob, a magnet and two magnetic sensors are provided, wherein preferably the magnet is rotatably formed and the two magnetic field sensors are formed stationary. Operating device according to one of the preceding claims, characterized in that it is designed for a push-turn operation and the rotary knob can be pressed in the off position and is rotatable only after pressing in order to achieve the working position. Operating method for an operating device according to one of the preceding claims, characterized in that the operating device is brought from an off position starting in a working position or rotated, wherein it is rotatable from the working position in opposite directions of rotation against a counterforce, wherein the angle of rotation is detected and causes a function setting of a so-called heating device. Operating method according to claim 12, characterized in that the operating device is pressed from the off position, first pressed and then brought into the working position or is rotated. Operating method according to claim 12 or 13, characterized in that the control is designed so that with increasing rotation angle, the function setting is faster or changes faster. Operating method according to claim 12 or 13, characterized in that by multiple rotary motion with a very small angle of rotation in the same direction, the function setting such as increasing or decreasing a power setting, preferably from an unstable intermediate position of the operating device, in particular the small rotation angle about 3 ° to 15 °.

Images