WO2012146269A1

WO2012146269A1 - Operator control device for a motor vehicle, and method for actuating a haptic device

Info

Publication number: WO2012146269A1
Application number: PCT/EP2011/006298
Authority: WO
Inventors: Volker Entenmann; Thorsten Alexander Kern; Jörg REISINGER; Jochen Sendler
Original assignee: Daimler Ag; Continental Automotive Gmbh
Priority date: 2011-04-28
Filing date: 2011-12-14
Publication date: 2012-11-01
Also published as: DE102011018897A1

Abstract

The aim is to demonstrate a solution regarding how to improve the quality of haptic feedback for the use of an operator control device in a motor vehicle in comparison with the prior art. An operator control device (1) according to the invention comprises a base support (2), where a touch-sensitive operating element (3) is arranged which, when pushed by an operator, can move at least by regions relative to the base support (2), wherein a function of the operator control device can be triggered when an activation position of the operating element (3) is reached. A haptic device (6, 8, 9, 10) produces a force on the operating element (3) when the activation position of the operating element (3) is reached, in order to produce haptic feedback for the operator. A control unit outputs a control signal (SA) to the haptic device, which control signal has a pulse (16, 18), the duration (Δt) of which is less than 50 ms, particularly less than 15 ms.

Description

Operating device for a motor vehicle and method for driving a

Haptikeinrichtung

The invention relates to an operating device for a motor vehicle, which preferably serves for operating or controlling functional units of the motor vehicle. The operating device comprises a base support, as well as a arranged on the base support - in particular touch-sensitive - actuating element which is at least partially movable when pressed by an operator relative to the base support. Upon reaching an activation position of the actuating element (when pressed), a function of the operating device is triggered. The operating device also includes a Haptikeinrichtung, which is adapted to the same when reaching the activation position of the actuating element with a force

apply and thereby produce a haptic feedback to the operator. A control unit outputs a control signal to the haptic to generate the force on the actuator. The invention also relates to a method for controlling a haptic device of an operating device in a motor vehicle.

The interest here is directed to the control of a Haptikeinrichtung an operating device, in particular a very special control device: It comprises an actuating element - such as a plate or the like - which serves on the one hand as a touch-sensitive field and on the other hand as a pressure switch. Such controls have been developed specifically for motor vehicles and allow a particularly reliable operation or control of a variety of functionalities of the motor vehicle. By sliding with at least one finger on the flat actuator, a function can be selected - this can be displayed on a display; the confirmation or the actual selection and the triggering of this function is carried out by pressing the actuating element. In this case, the actuating element is moved in the direction of the base support, and the Haptikeinrichtung provides a haptic feedback (feedback or snap) to the operator. It will be here generates a force which acts on the actuating element and thus on the operator. This is perceived by the operator as an acknowledgment of the triggered function. The fact that the quality of the haptic feedback is relatively low and the feedback is not real or the actuating element is not perceived as a genuine switching element is to be regarded as disadvantageous in the known control devices.

From the document DE 102 55 338 B3 a switching element with a deformable switching body is known, which is formed on an elastic switching mat. The switch body is surrounded by a holding body. On the switch body, an electrically conductive layer is applied, which electrically conductively connects two contact points when pressure is applied to the switch body, which are mounted on a printed circuit board. The holding body is positively and firmly connected to the switch body.

Furthermore, document DE 20 2009 000 096 01 discloses a device for simulating the feel of a wide variety of switching or feeler elements. The

Device includes an electronically controllable electric or magnetic actuator, which serves to apply force. The actuator is arranged exclusively in the axis of the switching or Tastvorgangs.

It is an object of the invention to provide a way in which the quality of the haptic feedback can be improved compared to the prior art in an operating device of the type mentioned.

This object is achieved by an operating device with the features according to claim 1, as well as by a method with the features according to claim 10. Advantageous embodiments of the invention are the subject of the dependent claims, the description and the figures.

An operating device according to the invention for a motor vehicle includes a

Basic carrier or base body, as well as a arranged on the base support - in particular touch-sensitive - actuating element which is at least partially movable when pressed by an operator relative to the base support. Upon reaching an activation position of the actuating element (relative to

Basic carrier), a function of the operating device can be triggered. It is one Haptikeinrichtung provided, which is adapted to achieve the

Activation position of the actuator selbiges actuator to apply a force and thereby give a haptic feedback to the operator. The haptic device is controlled by means of a control unit, which is designed for outputting a control signal to the haptic device in order to generate the force on the actuating element. The control unit is designed to generate the control signal with a pulse whose duration is less than 50 ms, in particular less than 40 ms, more preferably less than 30 ms, even more preferably less than 20 ms, even more preferably less than 15 ms more preferably less than 10 ms, more preferably less than 5 ms. Because the force acting on the actuator only for the duration of the pulse (during the pulse), the actuator is applied with the force even for less than 50 ms, in particular less than 5 ms.

The invention is based on several findings: The invention is based initially on the recognition that in the control devices according to the prior art, the quality of the haptic feedback is relatively low or the haptic feedback is insufficient. The invention further builds on the recognition that in the prior art, the quality of the feedback is low because the

Haptikeinrichtung is controlled incorrectly or suboptimal. The invention is further based on the finding that in the prior art, the control is suboptimal because the Haptikeinrichtung is driven with a relatively long signal and the forces acting on the actuator relatively long time and the operator thus perceives two different events or shocks , namely, on the one hand during the activation and on the other hand in the deactivation of the Haptikeinrichtung or when creating and when removing the control signal. Finally, the invention is based on the recognition that this problem can be circumvented by the fact that the Haptikeinrichtung is driven only for a very short period of time and the forces on the

Actuator be generated only for this short period of time. The quality of the haptic feedback can thus be improved compared to the prior art, and the operator perceives a single haptic event or a single shock when pressing the actuator. It has proved to be particularly advantageous if the duration of the pulse and thus the duration of the application of force has one of the following values: 0.8 ms or 0.9 ms or 1 ms or 1, 1 ms or 1, 2 ms or 1, 3 ms or 1, 4 ms or 1, 5 ms or 1, 6 ms or 1, 7 ms or 1, 8 ms or 1, 9 ms or 2 ms or 2.1 ms or 2.2 ms or 2.3 ms or 2.4 ms or 2.5 ms or 2.6 ms or 2.7 ms or 2 , 8 ms or 2.9 ms or 3 ms.

So the function of the operating device is triggered upon reaching the activation position of the actuating element (when pressed). Thus, also the haptic

Feedback on reaching the activation position and thus generated almost simultaneously with the effect of the function. The activation position is preferably achieved when a predetermined distance between the actuating element and the

Basic carrier is reached. This distance can be measured for example by means of a special sensor, namely in particular by means of at least one light barrier.

The haptic device preferably contains an electrical magnet arrangement, in particular with a multiplicity of planar induction coils, which are mounted on a circuit board or a circuit carrier. Then, the control unit may be configured to provide an electrical current as a control signal for the magnet assembly. The control signal is thus provided here in the form of an electric current (or an electrical voltage), and the magnet arrangement is acted upon by this electric current. In this way, the haptic feedback can be done very quickly; For example, an electrical switch can be closed and electric current flows immediately through the magnet arrangement. With the magnet arrangement, the actuating element is preferably in the direction of

The basic carrier is tightened so that the operator presses the

Actuator is supported by the magnet assembly. On the circuit board, in principle, a plurality of planar induction coils may be mounted, which are then acted upon by the control unit simultaneously with power. Thus, the plate-shaped actuator is attracted over the entire surface in the direction of the magnet assembly, always parallel to the body, and not at an angle to it.

Preferably, between the base support and the actuating element a

Return spring arrangement arranged, which is formed for the return division of the actuating element into a starting position, namely after removal of the force from the side of the operator or after releasing the actuating element. It proves to be particularly advantageous here if the force of the haptic device-in particular of the magnet arrangement-acts in the direction against a spring force of the return spring arrangement. This reduces the mechanical resistance when pressing the Actuator, and the operator takes a "snapping" the

Actuating true - similar to a conventional spring switch or snap switch. The return spring arrangement can in particular between the

Magnet arrangement and the actuating element to be arranged.

The Haptikeinrichtung can also be assigned a metallic and magnetic - formed from steel - anchor plate, which with the actuating element - this may be formed from plastic - is preferably firmly connected. This anchor plate then ensures that the actuator (together with the anchor plate) attracted by the magnet assembly and thus the haptic feedback can be generated at all.

So the Haptikeinrichtung is driven with a pulse whose duration is less than 50 ms, in particular less than 5 ms. Thus, it is achieved that the operator perceives when pressing the actuating element - upon reaching the activation position - only a single haptic effect or a single "snapping".

In particular, the switching off of the haptic device is thus not perceived or only very little. This perception of turning off the haptic device can be further reduced by selecting a falling edge of the pulse longer than its rising edge. The falling edge may for example be longer than 1 ms, in particular longer than 2 ms. For example, the length of the trailing edge may be approximately equal to the length of the maximum of the pulse. Thus, the actuator is gently intercepted when turning off the Haptikeinrichtung, and the operator takes only a single "snap" true, namely after reaching the activation position of the actuating element.

The pulse of the control signal is thus generated after reaching the activation position of the actuating element, so that in this activation position, the operator perceives a single "snapping." If the actuating element is released, it is preferably moved due to the restoring force in its initial position and thus passes once again the activation position Even after this renewed reaching of the activation position in the return part of the actuating element, a pulse can be delivered to the haptic device and thus a further haptic feedback can be generated, so after the first pulse, a second pulse can be generated again for the actuating element during one and the same actuating operation With to apply the force. The duration of the second pulse may also be less than 50 ms, in particular less than 15 ms, preferably less than 5 ms. The duration of the second pulse is preferably equal to the duration of the first pulse. The

Operator thus takes on the one hand a first "snap" when pressing the

Actuator and on the other hand, a second "snap" (snapback or backsnap) when releasing the actuator true

Actuator as a real snap-action switch, which significantly increases the ease of use of the operating device.

The "snapback" is particularly real, if it is at the earliest 20 ms,

in particular 30 ms at the earliest, after the first pulse, that is to say after the first "snap" is generated, so that the second pulse is generated after fulfilling two criteria: the first criterion includes at least 20 ms, in particular at least 30 ms, since the first pulse The second criterion includes that the actuator passes the activation position, namely on the way back to the starting position, in that the time interval between the two

In any event, pulses greater than 20 ms, in particular greater than 30 ms, prevents the two consecutive haptic responses from being perceived as a vibration of the actuator. The perception of the "snapback" can be increased compared to the haptic feedback when pressing the actuator when the amplitude of the second pulse is greater than that of the first pulse.

Even with the second pulse, one of the flanks can be longer than the other. If one were to design the second pulse the same as the first pulse (the falling edge longer than the rising edge), then the operator would press the

Actuator perceive a "click-click." Such a haptic

Feedback is not very real and has little in common with the feel of a conventional snap-action switch. In order to ensure a natural feeling when operating the operation of the actuating element, it is provided in one embodiment that - inversely as in the first pulse - the rising edge of the second pulse is longer than its falling edge. In this way, it is possible to provide an operating device in which the operator perceives a "click-clack" when pressing the actuator, and not a "click-click". The rising edge of the second pulse can be about the same length as the falling edge be the first pulse. It can for example be longer than 1 ms, in particular longer than 2 ms. In particular, the second pulse is designed mirror-symmetrically with respect to the first pulse.

As already stated, the amplitude of the second pulse may be different from the amplitude of the first pulse. In particular, it can be provided that the amplitude of the second pulse is higher than that of the first pulse. Then, the "backslap" when releasing the actuator is perceived stronger than the "snap" (snap) when pressing the actuator. This further increases the user-friendliness of the operating device.

The control unit can superimpose the first pulse-and in particular the second pulse-with an acoustic signal which has a higher frequency and a significantly lower amplitude than the control signal. While the two pulses provide for the application of the force and thus for the movement of the actuating element (snap, backsnap), the acoustic signal causes a high-frequency oscillation of the actuating element with a much lower amplitude and also provides for acoustic effects when operating the actuating element. The acoustic signal may be a periodic signal having at least one frequency, wherein in principle any acoustic signal is conceivable. The acoustic signal may have a frequency spectrum in the audible frequency range. The frequency of the acoustic signal may be, for example, in a frequency range of 1 kHz to 20 kHz. The acoustic signal can be

Rectangular signal or be a sinusoidal signal.

Because the control signal preferably includes two, in particular only two, successive pulses, the frequency spectrum of the control signal is relatively wide or the control signal includes a plurality of frequency components. It also includes

Frequency components, which with a resonant frequency of the operating device

coincide and thus be disproportionately strengthened. Such disturbing - z. B. Räsonierenden - Frequency components can be filtered out using a frequency filter, then these frequency components are not introduced into the system. The control unit can thus frequency filter the control signal, be it with the superimposed acoustic signal or without the acoustic signal, in order to achieve a linear behavior of the system. It can, for example, a band stop filter

(Band-stop filter) or a so-called comb filter (comb filter) can be used. It has proven to be advantageous when the frequency components of the control signal from about 0.8 kHz to about 1 kHz are filtered out. In this way, it is possible to reduce the disturbing acoustics when controlling the Haptikeinrichtung.

Overall, thus, an operating device is provided in which a particularly high-quality haptic feedback can be generated, which is intuitively perceived as the operation of a mechanical system or mechanical snap-action switch and thus represents a strong qualitative feature. In combination with

appropriate measures this allows new operating concepts. So can

For example, the amplitude of the two pulses and thus also the applied force (switching force level) are set depending on the particular application. When operating a wide variety of functional units of the motor vehicle, different haptic feedback messages can thus be generated, namely in each case with a different force in each case.

The invention also relates to a motor vehicle, in particular a

Passenger cars, with an operating device according to the invention.

According to the invention, a method for driving a

Haptikeinrichtung an operating device provided in a motor vehicle, wherein the operating device comprises a base support and an actuating element arranged thereon, which is at least partially - especially completely - moved relative to the base carrier when pressed by an operator, wherein upon reaching an activation position of the actuating element triggers a function of the operating device and the actuating element is acted upon by a Haptikeinrichtung with a force and thereby a haptic feedback is generated to the operator, and wherein a control unit outputs a control signal to the Haptikeinrichtung to generate the force on the actuating element. The control unit generates the control signal with a pulse whose duration is less than 50 ms, in particular less than 15 ms.

The preferred embodiments presented with reference to the operating device according to the invention and their advantages apply correspondingly to the motor vehicle according to the invention and to the method according to the invention. Further features of the invention will become apparent from the claims, the figures and the description of the figures. All the features and feature combinations mentioned above in the description as well as the features and feature combinations mentioned below in the description of the figures and / or shown alone in the figures are not only in the respectively indicated combination but also in others

Combinations or used alone.

The invention will now be explained with reference to a preferred embodiment, as well as with reference to the accompanying drawings.

Show it:

Fig. 1 in a schematic and slightly perspective view of a

Sectional view of an operating device according to an embodiment of the invention;

Fig. 2 in a schematic representation of the basic structure of

Operating means;

FIG. 3 shows an actuation characteristic or a progression of the force as a function of the path when actuating an actuating element; FIG. and

4A to 4F temporal courses of a control signal.

An operating device shown in FIG. 1 and designated overall by 1 serves to operate a wide variety of functional units in a motor vehicle. The

Control device 1 may for example be arranged on a center console in the motor vehicle or on a door. The operating device 1 includes a

Base support 2, on which an actuating element 3 (approximately in the form of a cover) is movably arranged. The actuating element 3 is on the one hand

touch-sensitive actuator and has a touch-sensitive surface 4; On the other hand, the actuator 3 can also relative to

Base support 2 to be moved, namely according to the arrow 5. The

Actuator 3 can therefore be pressed down - then moves the actuator 3 in the direction of the base support 2 according to the arrow 5. By Gliding with a finger over the touch-sensitive surface 4, the

Operator, for example, select a function of the motor vehicle by about a cursor is moved on a display device (similar to a notebook). If the desired function is selected or the cursor is located above the desired menu item or symbol, this function can be confirmed or triggered by pressing the actuating element 3. The entire actuating element 3 - with its entire surface 4 - then moves in the direction of the base support. 2

If the actuating element 3 reaches an activation position, this function is confirmed or triggered. Whether the actuator 3 has reached the activation position or not, can be determined for example by means of a light barrier.

As is apparent from Fig. 1, are located between the actuator 3 and the base support 2 and other components of the operating device 1, which are explained below with reference to FIG. 2 in more detail:

Referring to FIG. 2, the operating device 1 includes an anchor plate 6, which is connected to the actuating element 3, not shown in FIG. The armature plate 6 thus always moves with the actuating element 3. Between the armature plate 6 and the base support 2, the following components are further arranged: a return spring assembly 7, a printed circuit board 8 (board or circuit board) with attached planar induction coils 9 and a formed of steel Polschuhplatte 10. Here, the return spring assembly 7 is disposed directly between the armature plate 6 and the circuit board 8, while the pole plate 10 is located directly between the circuit board 8 and the base support 2.

The return spring assembly 7 is in principle a plate-shaped return spring, which has two mutually parallel strips 7a, 7b, which are connected to each other via a plurality of resilient cross members. Of the two strips 7a, 7b are outwardly from a plurality of resilient legs. In the two strips 7a, 7b and through holes 1 1 are formed, which serve to receive pole pieces 12 of the pole plate 10.

The return spring assembly 7 ensures a return of the actuating element 3 in a starting position, from which the actuating element 3 can be operated. The circuit board 8 forms together with the attached thereto

a ring-shaped induction coils 9 and the pole plate 10 a total of a magnet arrangement. Also, the circuit board 8 has a plurality of through holes 13 which are surrounded by the respective induction coils 9 and serve to receive the pole pieces 12.

The anchor plate 6 is also formed in the embodiment of steel.

Both the magnet arrangement including the printed circuit board 8, the induction coil 9 and the pole plate 10 and the anchor plate 6 form a total Haptikeinrichtung the operating device 1. This Haptikeinrichtung is used to generate a haptic feedback when pressing the actuator 3 according to the arrow 5. And indeed this is haptic feedback upon reaching the activation position both when pressing and when releasing the actuating element 3, that generates both when pressing down as well as during the return part of the actuating element 3. The control device 1 also includes a controller not shown in the figures - such as a microcontroller - which for controlling the

Haptic device is used. The control of Haptikeinrichtung done by

simultaneous energizing of the induction coils 9.

In fact, the control unit can deliver a control signal to the haptic device, on the basis of which the haptic device applies a force to the actuating element 3. The control signal is provided in the form of an electric current or an electrical voltage which is applied to the respective induction coils 9. Due to the electric current, the magnets formed by the induction coils 9 and the respective pole shoes 12 generate a force which acts on the magnetic armature plate 6. With this force, the actuating element 3 is attracted in the direction of the base support 2, ie against a spring force of the return spring arrangement 7. Thus, the operator is assisted in pressing the actuating element 3, as in a conventional snap-action switch.

A force-displacement characteristic of the operating device 1 is shown in FIG. 3. Shown is an approximately linear spring-travel characteristic 14 of the return spring arrangement 7, as well as a resulting due to the Haptikeinrichtung characteristic 15. As is apparent from Fig. 3, at the beginning of the path x proportional force F must be applied, namely due to the substantially linear characteristic curve 14 of the return spring assembly 7. After covering a path x1, the actuating element 3 reaches the

Activation position, and the Haptikeinrichtung is driven, namely for a period t1, as shown in the lower part in Fig. 3. After reaching the

Activation position also reduces the force F, which is applied by the operator, this due to the force of Haptikeinrichtung. Will the

Haptikeinrichtung no longer activated, so fall the two curves 14, 15 together again.

Now, the interest of driving the Haptikeinrichtung, and more specifically the design of the control signal (current or voltage) applies. Referring to FIGS. 4A to 4F, preferred embodiments of the control signal will now be explained in more detail:

In FIGS. 4A to 4F, an amplitude A is plotted on the Y-axis, while the time t is plotted on the X-axis. The control signal is denoted by SA.

In Fig. 4A, two different possible forms of the control signal SA are shown. Basically, the control signal SA includes a pulse 16, which preferably has a time Δt of about 1.5 ms - this period Δt refers to the maximum of the pulse 16. As shown in Fig. 4A on the right side, a pulse 16 be generated, the falling edge 17 is significantly longer than the substantially vertical rising edge. This falling edge 17 may also be about 1, 5 ms or 2 ms long.

In Fig. 4B, a control signal SA is shown, which has a total of 2 pulses, namely a first pulse 16, as well as a second pulse 18. The first pulse 16 is generated upon reaching the activation position when pressing the actuator 3, while the second pulse 18th is generated upon reaching the activation position when resetting the actuator 3. In this way, the user on the one hand, the "snatching" and on the other hand, the "snapping back" true. A time interval ΔΤ between the two pulses 16, 18 is at least 30 ms; this means that the second pulse 18 can be generated at the earliest after 30 ms after the first pulse 16. As shown in dashed line in FIG. 4B, the amplitude of the second pulse 18 may be higher than that of the first pulse 16. The "snapback" is thus perceived stronger than the "snapping". It proves to be particularly advantageous if - as shown in Fig. 4C - the second pulse 18 is mirror-symmetric with respect to the first pulse 16. Namely, a rising edge 19 of the second pulse 18 may be the same length as the falling edge 17 of the first pulse 16. Both edges 17, 19 may be about 1, 5 ms or 2 ms long. With the control signal SA according to FIG. 4C, the operator perceives a "click-click" when actuating the actuating element 3, and not a "click-click" as with the control signal SA according to FIG. 4B.

The two pulses 16, 18 can also be superimposed on an acoustic signal SB, as shown by way of example in FIG. 4D. The acoustic signal SB comprises in principle two periodic sub-signals SB1, SB2, which are spaced apart in time by ΔΤ. The first sub-signal SB1 is superimposed on the first pulse 16, while the second sub-signal SB2 is superimposed on the second pulse 18. The acoustic signal SB has a significantly higher frequency and a significantly lower amplitude than the control signal SA. The frequency of the acoustic signal SB can be, for example, in a value range from 1 kHz to 20 kHz. As an acoustic signal SB can be used in principle any acoustic signal; the acoustic signal SB may also be a simple sinusoidal signal or a square wave signal. A ratio of the amplitude A of the acoustic signal SB to the amplitude A of the pulses 16, 18 is, for example, in a value range from 1:20 to 1: 5. If the acoustic signal SB is modulated onto the two pulses 16, 18, a control signal SA results, as shown in FIG. 4E. The control signal SA according to FIG. 4E corresponds in principle to the control signal SA according to FIG. 4B with the superimposed acoustic signal SB according to FIG. 4D. Preferably, here the second pulse 18 can be mirrored so that - unlike in Fig. 4E shown - its rising edge is longer than its falling edge.

The acoustic signal SB provides in principle for a high-frequency oscillation of the

Actuator 3 with a relatively small amplitude. As for an acoustic effect, which is dependent on the configuration of the acoustic signal SB.

The control signal SA can also be subjected to frequency filtering in order to filter out interfering frequency components which coincide with a natural frequency of the operating device 1 or a resonance frequency. It has proved advantageous after numerous measurements when the frequency components of approximately 0.8 kHz to 1 kHz are filtered out using a band stop filter or a comb filter. Such a filtered control signal SA is shown schematically in FIG. 4F.

Claims

Patent claims

Operating device (1) for a motor vehicle, with:

- a base support (2),

- an actuating element (3) arranged on the base support (2), which when pressed by an operator is at least partially relative to the

Base support (2) is movable, a function of the operating device (1) being able to be triggered when the actuating element (3) reaches an activation position,

- a haptic device (6, 8, 9, 10), which is designed to apply a force (F) to the actuating element (3) when the actuating element (3) reaches the activation position and thereby generate haptic feedback to the operator , and

- a control unit for sending a control signal (SA) to the

Haptic device (6, 8, 9, 10) to generate the force (F) on the actuating element (3),

characterized in that

the control unit is designed to generate the control signal (SA) with a pulse (16, 18) whose duration (Ät) is less than 50 ms, in particular less than 15 ms.

Operating device (1) according to claim 1,

characterized in that

the haptic device (6, 8, 9, 10) comprises an electrical magnet arrangement (8, 9, 10), in particular with a plurality of planar induction coils (9), and the control unit is designed to generate an electrical current as a control signal (SA) for the magnet arrangement.

Operating device (1) according to claim 1 or 2,

characterized in that between the base support (2) and the actuating element (3).

Return spring assembly

(7) is arranged to return the actuating element (3) to a starting position, the force (F) of the haptic device (6,

8, 9, 10) acts in the direction against a spring force of the return spring arrangement (7).

Operating device (1) according to one of the preceding claims,

characterized in that

a falling edge (16) of the pulse (16) is longer than a rising edge of the pulse (16).

Operating device (1) according to one of the preceding claims,

characterized in that

the control unit is designed, in particular after reaching the activation position again when the actuating element (3) is reset, to generate a second pulse (18) of the control signal (SA) after the first pulse (16) in order to apply the force to the actuating element (3). (F), a duration of the second pulse (18) being in particular equal to the duration of the first pulse (16).

Operating device (1) according to claim 5,

characterized in that

the second pulse (18) can be generated at the earliest 20 ms, in particular at the earliest 30 ms, after the first pulse (16).

Operating device (1) according to claim 5 or 6,

characterized in that

a rising edge (19) of the second pulse (18) is longer than its falling edge.

Operating device (1) according to one of claims 5 to 7,

characterized in that

an amplitude (A) of the second pulse (18) is different, in particular higher, than an amplitude (A) of the first pulse (16).

9. Operating device (1) according to one of the preceding claims,

characterized in that

the control unit is designed to superimpose the first pulse (16, 8), and in particular also the second pulse (16, 18), with an acoustic signal which has a higher frequency and a lower amplitude compared to the control signal (SA), and / or the control unit is designed to subject the control signal (SA) to frequency filtering.

10. Method for controlling a haptic device (6, 8, 9, 10).

Operating device (1) in a motor vehicle, wherein the operating device (1) has a base support (2) and an actuating element (3) arranged thereon, which is moved at least partially relative to the base support (2) when pressed by an operator, whereby when a Activation position of the actuating element (3) a function of the operating device (1) is triggered and the actuating element (3) is acted upon by a haptic device (6, 8, 9, 10) with a force (F) and thereby generates a haptic feedback to the operator is, and wherein a control unit emits a control signal (SA) to the haptic device (6, 8, 9, 10) in order to control the force (F) on the

to produce actuating element (3),

characterized in that

the control unit generates the control signal (SA) with a pulse (16, 18) whose duration (At) is less than 50 ms, in particular less than 15 ms.