DE102018210952A1 - Tactile user interface and method for customizing it - Google Patents

Abstract

The invention relates to a tactile user interface (1, 21) for interacting with a body part (12) of a vehicle occupant in a motor vehicle, comprising a passive component (8, 28), an active component (10, 30), which has a first shape and in a state of rest at least one activation state has a second form, an interaction surface (6, 26) which is formed on the active component and / or on the passive component, and a tactile HMI device (20).

Description

The invention relates to a tactile user interface, a tactile HMI device with such a user interface, a motor vehicle with such a tactile HMI device and a method for adapting a tactile user interface by means of a tactile HMI device.

In the present case, a tactile user interface is to be understood in particular as a component, for example of a motor vehicle, which is used to interact with a body part of a user, for example a vehicle occupant. In the present case, the term user interface also means in particular the component or assembly on which the interface is formed in the narrower sense, for example on an interaction surface.

The invention is described below in the context of motor vehicles and their tactile user interface, but in itself can be used independently of it.

A large number of tactile user interfaces are installed in motor vehicles - and in passenger cars as well as in trucks and motorcycles: the pedals interact with a driver's foot, the vehicle seats with the legs and torso of a vehicle occupant, the steering wheel and the gear knob with the hands , the headrest with the head or the armrest with the forearm.

These - mentioned because of their safety relevance - and a large number of other examples of tactile user interfaces in motor vehicles are generally known.

New generative manufacturing technologies (keyword 3-D printing) enable an individualized adaptation of the interaction surface of such tactile user interfaces to a specific user, in particular vehicle occupants.

For this purpose, for example, the hands of the buyer of a vehicle are measured with a 3D scanner and, for example, a steering wheel contour is adapted to the hands of the buyer according to the measurement result.

The resulting ergonomic improvement, however, can only be used by the person being measured, as well as a potential gain in safety in critical driving situations through the exact adaptation of the tactile user interface to the body proportions of a particular user.

Against this background, it is an object of the invention to provide an improved tactile user interface, an improved tactile HMI device and a method for adapting such a tactile user interface.

This object is achieved by a tactile user interface with the features of claim 1, a tactile HMI device (HMI = Human Machine Interface) with the features of claim 6, a motor vehicle with the features of claim 9 and by a method with the features of Claim 10. The dependent claims relate to advantageous embodiments of the invention.

1. a) wenigstens eine Passivkomponente, die insbesondere eine unter normalen Betriebsbedingungen formstabile Struktur und/oder eine unter normalen Betriebsbedingungen formstabiles Material aufweist (insbesondere darauf bezieht sich der Begriff Passivkomponente). Beispielsweise kann die Passivkomponente eine oder mehrere Aktivkomponenten abstützen.
2. b) wenigstens eine Aktivkomponente, die insbesondere als sogenanntes 4-D-Teil ausgebildet ist und/oder mittels eines 3-D-Druck-Verfahrens hergestellt ist. Insbesondere weist die wenigstens eine Aktivkomponente in einem Ruhezustand eine erste Form und in wenigstens einem Aktivierungszustand eine zweite Form auf. Insbesondere ist also möglich, dass die Aktivkomponente zu einem ersten Zeitpunkt (beispielsweise in einem Ruhezustand) eine andere Form und/oder Oberflächenstruktur aufweist als zu einem zweiten Zeitpunkt (beispielsweise in einem Aktivierungszustand), wobei die Aktivierung zur Formänderung insbesondere von einer Ausprägung einer Aktivierungsgröße abhängt. Insbesondere stützt sich die Aktivkomponente an der Passivkomponente ab.

According to a first aspect of the invention, a tactile user interface is provided for interaction with a body part of a vehicle occupant in a motor vehicle, the tactile user interface being set up in particular for operation by means of a body part of a motor vehicle occupant and / or for supporting a body part of a vehicle occupant. The tactile user interface has at least:

1. a) at least one passive component which in particular has a structure which is dimensionally stable under normal operating conditions and / or a material which is dimensionally stable under normal operating conditions (in particular the term passive component refers to this). For example, the passive component can support one or more active components.
2. b) at least one active component, which is designed in particular as a so-called 4-D part and / or is produced by means of a 3-D printing process. In particular, the at least one active component has a first shape in an idle state and a second shape in at least one activation state. In particular, it is therefore possible for the active component to have a different shape and / or surface structure at a first point in time (for example in an idle state) than at a second point in time (for example in an activation state), the activation for the change in shape depending in particular on an expression of an activation variable , In particular, the active component is supported on the passive component.

• c) eine Interaktionsoberfläche, die an der Aktivkomponente und/oder an der Passivkomponente ausgebildet ist. Insbesondere ändert sich mit der Aktivierung der Aktivkomponente eine Oberflächenform und/oder eine Oberflächenstruktur der Interaktionsoberfläche. Insbesondere stellt die Interaktionsoberfläche in einem engeren Sinne die Schnittstelle zu dem interagierenden Körperteil des Benutzers dar.

An idle state of the active component is to be understood in the present case in particular as a state in which the outer contour (in the present case is used synonymously with the term outer shape) and / or the surface structure of the active component is in a non-activated, ie non-excited and / or deformed, state. In the present case, an activation state is to be understood in particular as a state in which one Activation size acts on the active component such that it changes its outer contour and / or its surface structure.

• c) an interaction surface which is formed on the active component and / or on the passive component. In particular, a surface shape and / or a surface structure of the interaction surface changes with the activation of the active component. In particular, the interaction surface represents the interface to the interacting body part of the user in a narrower sense.

The active component (s) and the passive component (s) are connected to one another, in particular directly or indirectly, in such a way that the interaction surface is formed on an interacting body part, in particular as a result of a structural change and / or a change in shape, when the active component, in particular from the idle state or a less strong activation state, is brought into a, in particular single or stronger, activation state.

In the present case, the term shaping is to be understood in particular to mean that the interaction surface, due to the change in shape during activation, with its outer contour approaches an outer contour of the interacting body part of the user, in particular comprises part of the outer contour of the body part by approaching and / or fitting. For example, it can be provided that the interaction surface partially embeds the circumference of a finger on a steering wheel when the active component is activated and / or that the interaction surface on a pedal encompasses a forefoot below and to the side. In the present case, “shaping” can also be referred to in particular when the interacting body part does not yet touch the interaction surface at the time of shaping, but the shaping represents, for example, preparation for an improved interaction of the interacting body part and the interaction surface.

The invention is based, among other things, on the knowledge that tactile user interfaces of safety-critical vehicle components such as a steering wheel, in terms of ergonomics and also in terms of safety in critical driving situations, should best be adapted to each driver or vehicle occupant and their physical proportions. With current tactile user interfaces, however, as shown in the introduction, only permanent adaptation to a single person is possible.

The invention is now based, inter alia, on the idea of designing a tactile user interface in such a way that the operation and / or support - that is to say the interaction of the interacting body part with the user interface itself - results in an adaptation to the operator.

In the sense of the invention, this can be achieved, for example, by using auxetic structures which are designed such that by touching the interaction surface with increased pressure of the interacting body part on the interaction surface, the latter is deformed in such a way that it forms the interacting body part.

An embodiment of the invention is based, inter alia, on the idea of improving safety and / or ergonomics in certain driving situations when a certain triggering situation is present.

For this purpose, according to a further aspect of the invention, a tactile HMI device is provided, which provides a tactile user interface and an activation unit for, in particular temporarily, putting the active component into an activation state. The active component is then brought into the activation state, in particular, when a certain triggering condition is present.

In this aspect of the invention, the molding onto the body part of the operator can then be triggered in particular by means of a control unit for determining an activation condition for the activation unit, in particular using sensor data and / or data of an operating model which are accessible by means of a control system of the motor vehicle , regarding an activation size.

Examples of the activation variable and associated activation conditions include: i) a critical driving situation, the condition being, for example, an acceleration such as, in particular, a braking acceleration and / or a curve acceleration; ii) a dangerous situation, the condition being, for example, an obstacle detected in front of the vehicle; iii) a predetermined driving mode, the condition being, for example, switching a sport mode or another predetermined driving mode.

According to a further aspect of the invention, a motor vehicle is provided, in particular a passenger car, a truck or a motorcycle, which has at least one tactile user interface according to an embodiment of the invention and / or at least one tactile HMI device according to an embodiment of the invention.

According to a further aspect of the invention, a method for adapting a tactile user interface by means of a tactile HMI Device, in particular according to an embodiment of the invention. The method has at least the following method steps: I) determining an activation condition for the activation unit, in particular by means of the control unit; and II) placing the active component in an activation state, in particular by means of the activation unit.

In order to ensure that an outer contour and / or a surface structure of the interaction surface is influenced, according to one embodiment the active component is set up to be brought into an activation state by introducing and / or changing an activation variable.

In order to be able to work with different activation sizes for different applications, according to one embodiment the activation size is at least one of the following sizes: an introduced change in a shape of the active component onto which a web structure, in particular an at least partially auxetic structure, of the active component with a predetermined change in shape responding; and / or an introduced change in a magnetic energy, an electrical energy, a mechanical energy and / or an electromagnetic energy, in particular an electrical voltage, a temperature and / or a humidity of the active component, to which a shape memory material and / or a bimaterial of the active component responded with a predetermined change.

In the present case, an auxetic structure is to be understood in particular to mean a spatial structure, for example an active component, which has a negative transverse contraction number at least in some areas of its extent. I.e. in particular that the auxetic structure undergoes compression in a compression in a first direction due to its internal web structure, and in a second direction which is in particular orthogonal to the first direction. The same applies to stretching. Auxetic structures are generally known.

In the context of the invention, auxetic structures can be used as an active component, in particular in such a way that a compression of the active component by the interacting body part results in a deformation of the tactile user interface, which is equivalent to an adaptation to the corresponding body part. This means that the transverse contraction number can have different values in different chambers of a web structure of the auxetic structure.

In the present case, a shape memory material is to be understood to mean, for example, a shape memory alloy which is known per se and which, depending on an activation variable, such as heat, moisture, the application of force and / or an electrical voltage, changes its shape when the appropriate activation variable changes appropriately according to its “memory” can change in a predetermined manner. Shape memory materials of this type are also known per se.

In the present case, a bimaterial is to be understood as a structure with at least two interconnected components made of different materials, the different materials exhibiting a “deformation mismatch” (bimaterial effect) when the corresponding activation size changes due to the connection with one another. Various bimetals, for example, are known per se, in which different strains occur due to a change in temperature or a change in an applied electrical voltage or an applied magnetic field, which result in a bending of the structure due to the connection of the two metals.

In order to be able to achieve a different degree of shaping of the interaction surface, according to one embodiment the active component has an activation development, in particular at least one, in particular discrete, activation condition and / or an, in particular continuous, activation curve.

The activation development is, in particular, defined by a level and / or a change level of the activation size, so that in particular the interaction surface is shaped to the interacting body part the more the activation size is introduced. The shape of the user interface and / or the interaction surface can also play a role in the molding.

• - Ein Pedal, insbesondere ein Bremspedal, wobei insbesondere eine Trittfläche des Pedals wenigstens eine Aktivkomponente, insbesondere mit einer auxetischen Struktur, aufweist, die bei Aktivierung durch den Druck des interagierenden Fuß diesen mittels Anformung teilweise umfasst.
• - Ein Fahrzeugsitz, wobei insbesondere eine Sitzflanke und/oder eine Kopfstütze des Fahrzeugsitzes wenigstens eine Aktivkomponente, insbesondere mit einer auxetischen Struktur, aufweist, die bei Aktivierung durch den Druck des interagierenden Oberschenkels, Rumpfes oder Kopfes diesen mittels Anformung teilweise umfasst.
• - Ein Lenkrad, wobei insbesondere ein Lenkradkranz wenigstens eine Aktivkomponente, insbesondere mit einer auxetischen Struktur, aufweist, die bei Aktivierung durch den Druck eines oder mehrerer interagierender Finger oder einer interagierenden Hand diese/n mittels Anformung teilweise umfasst.
• - Analog kann auch ein Schaltknauf, eine Armauflage oder ein Motorradlenker an geeigneten Stellen wenigstens eine Aktivkomponente aufweisen, die durch den Druck des interagierenden Körperteils aktiviert werden kann.

So that the invention can be applied to different tactile user interfaces, different tactile user interfaces can be designed according to one embodiment of the invention according to different embodiments:

• A pedal, in particular a brake pedal, in particular a pedal surface of the pedal having at least one active component, in particular with an auxetic structure, which, when activated by the pressure of the interacting foot, partially surrounds it by means of molding.
• - A vehicle seat, wherein in particular a seat flank and / or a headrest of the vehicle seat has at least one active component, in particular with an auxetic structure, which, when activated by the pressure of the interacting thigh, torso or head, partially encompasses it by means of molding.
• - A steering wheel, wherein in particular a steering wheel rim has at least one active component, in particular with an auxetic structure, which, when activated by the pressure of one or more interacting fingers or an interacting hand, partially encompasses them by means of molding.
• - Analogously, a gear knob, an armrest or a motorcycle handlebar can have at least one active component at suitable points, which can be activated by the pressure of the interacting body part.

• - Ein Pedal, insbesondere ein Bremspedal, wobei insbesondere eine Trittfläche des Pedals wenigstens eine Aktivkomponente, insbesondere mit einen spannungssensitiven Formgedächtnismaterial, aufweist, die bei Aktivierung durch die Steuereinheit den interagierenden Fuß mittels Anformung teilweise umfasst, beispielsweise bei einer kritischen Fahrsituation.
• - Ein Fahrzeugsitz, wobei insbesondere eine Sitzflanke, eine Frontkante und/oder eine Kopfstütze des Fahrzeugsitzes wenigstens eine Aktivkomponente, insbesondere mit einen spannungssensitiven Formgedächtnismaterial, aufweist, die bei Aktivierung durch die Steuereinheit den interagierenden Oberschenkel, Knie, Rumpf und/oder Kopf mittels Anformung teilweise umfasst, beispielsweise bei einer schnellen Kurvenfahrt und/oder bei einer kritischen Fahrsituation.
• - Ein Lenkrad, wobei insbesondere ein Lenkradkranz wenigstens eine Aktivkomponente, insbesondere mit einen spannungssensitiven Formgedächtnismaterial, aufweist, die bei Aktivierung durch die Steuereinheit einen oder mehrere interagierende Finger oder eine interagierende Hand mittels Anformung teilweise umfasst, beispielsweise in einem Sportmodus oder in einer kritischen Fahrsituation. Auch kann vorgesehen sein, dass die Lenkradoberfläche zur späteren Interaktion mit einer Hand des Benutzers dieser Hand vergrößernd angeformt wird, wenn eine kritische Fahrsituation identifiziert ist.
• - Analog kann auch ein Motorradlenker an geeigneten Stellen wenigstens eine Aktivkomponente aufweisen, die durch die Steuereinheit aktiviert werden kann.

According to various designs, different tactile user interfaces can also be used in a tactile HMI device:

• - A pedal, in particular a brake pedal, wherein in particular a step surface of the pedal has at least one active component, in particular with a voltage-sensitive shape memory material, which, when activated by the control unit, partially encompasses the interacting foot by means of molding, for example in a critical driving situation.
• - A vehicle seat, wherein in particular a seat flank, a front edge and / or a headrest of the vehicle seat has at least one active component, in particular with a voltage-sensitive shape memory material, which, when activated by the control unit, partially interacts with the interacting thigh, knee, trunk and / or head includes, for example, when cornering quickly and / or in a critical driving situation.
• - A steering wheel, in particular a steering wheel rim having at least one active component, in particular with a voltage-sensitive shape memory material, which, when activated by the control unit, partially includes one or more interacting fingers or an interacting hand by means of molding, for example in a sport mode or in a critical driving situation. Provision can also be made for the steering wheel surface to be enlarged for later interaction with a hand of the user of this hand when a critical driving situation is identified.
• - Similarly, a motorcycle handlebar can have at least one active component at suitable points, which can be activated by the control unit.

So that the control unit can trigger the active component (s) of one or more HMI devices on the basis of various condition regimes, according to one embodiment for determining the activation condition, 1) it is determined whether there is a critical driving situation, in particular a dangerous situation; and / or 2) whether there is a crash or is unavoidable; and / or 3) whether there is cornering; and / or 4) whether there is an autonomous driving situation; and / or 5) what period of time a current trip already takes; and / or 6) which driving mode is selected.

• 1 a-b eine an einem Lenkrad ausgebildete taktile Benutzerschnittstelle nach einer beispielhaften Ausführung der Erfindung in einen Ruhezustand (1a) und in einen Aktivierungszustand (1b); und
• 2 a-b eine HMI-Einrichtung nach einer beispielhaften Ausführung der Erfindung mit einer an einem Lenkrad ausgebildeten taktilen Benutzerschnittstelle, dargestellt in einem Ruhezustand (2a) und in einem Aktivierungszustand (2b).

Further features, advantages and possible uses of the invention result from the following description in connection with the figures. They show, partly in a highly schematic representation,

• 1 from a tactile user interface formed on a steering wheel according to an exemplary embodiment of the invention in a state of rest ( 1a) and into an activation state ( 1b) ; and
• 2 from an HMI device according to an exemplary embodiment of the invention with a tactile user interface formed on a steering wheel, shown in an idle state ( 2a) and in an activation state ( 2 B) ,

In the 1a and 1b is one on a steering wheel rim 2 a steering wheel 4 trained tactile user interface 1 shown. In the area of the intersection line A - A and at the same steering wheel height on the right is an interaction surface 6.1 respectively. 6.2 arranged, which is set up for receiving individual fingers and / or hand parts of the driver when steering.

Both 1a and 1b each show a schematic top view of the steering wheel on the left 4 , where in 1a the tactile user interface 1 in the idle state of an active component 10 and in 1b in an activation state of the active component 10 is shown. On the right is a section of the tactile user interface 1 shown along the section line A - A.

In 1 a shows the sectional view A - A a passive component designed as a support tube 8th , an active component designed with a web structure 10 with a variety of radial webs 11 and circumferential bars 12 , as well as the interaction surface 6.1 , The web structure can have auxetic properties in partial areas or in the entire area of the web structure.

The active component 10 is supported on its inner side on a peripheral surface of the passive component 8th from. The active component bears on its outer side 10 the interaction surface 6.1 ,

In 1a is not a hand to steer the steering wheel 4 and especially its interaction surface 6.1 created so that the user interface 1 and especially the active component 10 is in the idle state. In the idle state, the web structure of the active component has a circular cross-section - that is, a typical shape of a steering wheel rim 2 - on.

In 1b is the steering wheel 4 out 1a shown in an activation state. There is one hand on each of the interaction surfaces and 6.1 and 6.2 12.1 respectively. 12.2 created (which because of the clear presentation next to instead of on the surfaces 6 is drawn).

Like section A - A of 1 b can be seen brings the hand 12.1 , especially the thumb, on the interaction surface 6.1 a force F radial to the passive component 8th on, causing the radial webs 11 the active component 10 be folded in the sense of folding.

By designing the structure of the active component 10 with a suitable constellation of transverse contraction numbers of the individual, through the webs 11 . 12 shaped chambers 13 and / or the shape of the chambers 13 the interaction surface forms 6.1 hand 12.1 on. In particular, the operator input F at least partially implemented in reaction forces F _R holding the hand 12.1 - here, for example, the thumb - hold firmly.

The constellation of the transverse contraction numbers and the shape of the chambers in the exemplary embodiment is specifically matched to the intended application.

In the 2 a and 2 B is a tactile HMI device 20 according to an exemplary embodiment of the invention with a steering wheel rim 22 a steering wheel 24 trained tactile user interface 21 and an activation unit 34 and a control unit 36 shown. The control unit 36 can on a state determination unit 38 access an operating model with suitable sensors and / or suitable access. In the area of the intersection line B - B and at the same steering wheel height there is an interaction surface on the right 26.1 respectively. 26.2 arranged, which is set up for receiving individual fingers and / or hand parts of the driver when steering.

Both 2a and 2 B each show a schematic top view of the tactile HMI device on the left 20 , where in 2a the tactile user interface 21 in the idle state of active components 30.1 . 30.2 and 30.3 and in 2 B in an activation state of the active components 30 is shown. On the right is a section of the tactile user interface 21 drawn along the section line B - B.

in the 2a shows the sectional view B - B with a support tube 28.1 and at least one elastic filling component 28.2 trained passive component 28 , In addition, the three active components 30.1 . 30.2 . 30.3 each arranged with a tension-sensitive shape memory material. The active components 30 are supported on the support tube 28.1 and are in the filling component 28.2 embedded. The interaction surfaces 26.1 and 26.2 are on the outside of the filling component 28.2 the passive component 28 arranged.

The active components 30 are set up when a predetermined electrical voltage is applied U change their shape, taking the active components 30.1 and 30.3 lengthen when the voltage is applied, whereas the active component 30.2 can shorten.

The control unit 36 continuously monitors incoming data from the condition determination unit 38 , In the exemplary embodiment, the incoming data is used to monitor, among other things, whether there is an uncritical or a critical driving situation.

In 2a there is an uncritical driving situation, so that the tactile user interface 21 and especially the active components 30 are at rest because the control unit 36 at the activation unit 34 consequently has not activated an activation state. In the idle state, the active components 30 each have a shape that defines the interaction surface 26.1 on the outside of the passive component 28 in a circular cross-section - a typical shape of a steering wheel rim 22 - holds.

In 2 B is the steering wheel 24 out 2a shown in an activation state. The control unit needed to trigger this 36 using the state determination unit 38 detect a critical driving situation and if there is an activation condition by activating the activation state at the activation unit 34 react.

That by means of the triangle in 2 B activation signal shown in section B - B 40 ensures that at the activation unit 34 an electrical voltage U is created, which over the lines shown (dashed in 2a , dotted in 2 B) to the active component 30.1 . 30.32.3 is created. Forces occur due to the applied voltage F _U on which the outer contours of the active components 30 modify such that the elastic filling component 28.2 which is the interaction surface 26.1 carries, its shape in the sense of a shaping at hand 12.1 to change.

The in the 1 and 2 The exemplary embodiments shown relate to user interfaces 1 and 21 , which are formed on a steering wheel of a motor vehicle. It goes without saying that, in the sense of other exemplary embodiments of the invention, tactile user interfaces and / or tactile HMI devices adapted analogously can also be used without problems on pedals, seats, supports, motorcycle handlebars and other user interfaces of motor vehicles or beyond.

LIST OF REFERENCE NUMBERS

1

tactile user interface

2

steering wheel rim

4

steering wheel

6

Interaction surface

8th

passive component

10

active component

11

radial webs

12

circumferential lands

13

chamber

20

tactile HMI device

21

tactile user interface

22

steering wheel rim

24

steering wheel

26

Interaction surface

28

passive component

30

active component

34

activation unit

36

control unit

38

State determination unit

40

activation signal

F

operating force

F _R

reaction force

F _U

activation force

U

electrical voltage

Claims (11)

Tactile user interface (1, 21) for interacting with a body part (12) of a vehicle occupant in a motor vehicle, comprising: - a passive component (8, 28), - an active component (10, 30), which has a first shape in an idle state and in at least one activation state has a second shape, - an interaction surface (6, 26) which is formed on the active component and / or on the passive component, characterized in that the active component (10, 30) and the passive component (8, 28) are of such a type are connected to one another in such a way that the interaction surface (6, 26) forms an interacting body part (12) when the active component is brought into the activation state. Tactile user interface (1, 21) according to Claim 1 , characterized in that the active component (10, 30) is set up to be brought into an activation state by introducing an activation variable. Tactile user interface (1, 21) according to Claim 2 , characterized in that the activation variable is at least one of the following variables: a introduced change in a shape of the active component, to which a web structure, in particular an at least partially auxetic structure, of the active component (10, 30) reacts with a predetermined change in shape, and / or - an introduced change in a magnetic energy, an electrical energy, a mechanical energy and / or an electromagnetic energy, in particular an electrical voltage (U), a temperature and / or a humidity of the active component, on which a shape memory material and / or a Bimaterial of the active component (10, 30) reacts with a predetermined change. Tactile user interface (1, 21) according to Claim 2 or 3 , characterized in that the active component (10, 30) has an activation development, which is defined in particular by a level of the activation size, so that in particular the interaction surface (6, 26) molds itself to the interacting body part (12) the stronger the activation size is introduced. Tactile user interface (1, 21) according to one of the preceding claims, characterized in that the user interface - a pedal, in particular a brake pedal, - a vehicle seat, in particular a flank of the vehicle seat, - a steering wheel (4, 24), a shift knob, - a headrest, - an armrest, or - a motorcycle handlebar, or is arranged thereon. Tactile HMI device (20) of a motor vehicle, comprising a tactile user interface (21) according to one of the Claims 1 to 5 , characterized by an activation unit (24) for putting the active component (30) into an activation state. Tactile HMI device (20) according to Claim 6 , characterized by a control unit (36) for determining an activation condition for the activation unit (34). Tactile HMI device (20) according to one of the Claims 6 or 7 , characterized in that the tactile user interface (21) - a brake pedal, - a vehicle seat, in particular a flank and / or a front edge of the vehicle seat, - a steering wheel (24), - a headrest, or - a motorcycle handlebar, is or is arranged thereon is. Motor vehicle, characterized by at least one tactile user interface (1, 21) according to one of the Claims 1 to 5 and / or at least one tactile HMI device (20) according to one of the Claims 6 to 8th , Method for adapting a tactile user interface (21) by means of a tactile HMI device (20) according to one of the Claims 6 to 8th , comprising the method steps: - determining an activation condition for the activation unit (24), - placing the active component (30) in an activation state. Procedure according to Claim 10 , characterized in that, to determine the activation condition, it is determined - whether there is a critical driving situation, in particular a dangerous situation, - whether there is a crash or is unavoidable, - whether cornering is present, - whether there is an autonomous driving situation, - which period of time current journey already takes, and / or - which driving mode is selected.

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