DE102018101145A1 - Improved force sensor in foil technology - Google Patents

Improved force sensor in foil technology

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Publication number
DE102018101145A1
DE102018101145A1 DE102018101145.8A DE102018101145A DE102018101145A1 DE 102018101145 A1 DE102018101145 A1 DE 102018101145A1 DE 102018101145 A DE102018101145 A DE 102018101145A DE 102018101145 A1 DE102018101145 A1 DE 102018101145A1
Authority
DE
Germany
Prior art keywords
input device
region
capacitive sensor
layer
element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE102018101145.8A
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German (de)
Inventor
Sascha Staude
Raphael Mack
Norbert Vajda
Onofrio Intini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Schalter und Sensoren GmbH
Original Assignee
Valeo Schalter und Sensoren GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH
Priority to DE102018101145.8A priority Critical patent/DE102018101145A1/en
Publication of DE102018101145A1 publication Critical patent/DE102018101145A1/en
Application status is Pending legal-status Critical

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Abstract

The invention relates to an input device (10) having a force sensor system for a vehicle, having a bendable capacitive sensor layer (14) which has a plurality of capacitive sensor electrodes (20, 21, 22, 24) and a control surface element (12), wherein the capacitive sensor layer (14) has a first region (26) which is held on the back of the control surface element (12), the capacitive sensor layer (14) has a second region (28) which is bent relative to the first region (26) by 180 ° in that the capacitive sensor layer (14) has a third region (30) which is bent by 180 ° relative to the second region (28), a holding element (34) is arranged between the first region (26) and the second region (28) a compressible layer (36) is arranged between the second region (28) and the third region (30), wherein in each case a capacitive sensor electrode (20, 21,22, 24), and the second region (28) and the third region (30) with the compressible layer (36) form a force sensor (42).

Description

  • The present invention relates to an input device with a force sensor system for a vehicle, having a bendable capacitive sensor layer, which has a plurality of capacitive sensor electrodes, and a control surface element, wherein the capacitive sensor layer has a first region, which is held on the back of the control surface element.
  • In the prior art, input devices are known that can measure an actuation force on a surface. Such input devices are also referred to as a human-machine interface (MMI) or human machine interface (HMI). From the applied actuation force is closed to an operator intention of an operator. By such a force sensor can be avoided with high reliability errors. In contrast, a simple touch, as detected, for example, in corresponding touch-sensitive input devices, can easily be carried out accidentally, or be made with a wrong input device. Accordingly, an operation can be detected, even if this contact is accidental or wrong.
  • In particular, when driving a vehicle, it is easy to operate incorrectly. On the one hand, this is due to the fact that a driver of the vehicle has to use a large part of his attention when driving the vehicle to guide the vehicle, and an operation of the input device takes place virtually "incidentally". In addition, even in modern vehicles with a very good chassis during driving, vehicle movements may occur which make the operation of the input device more difficult. Compared to a simple detection of a touch, it is necessary in a force sensor that the operation additionally exceeds a force threshold, so that a faulty operation in contrast occurs with a lower probability.
  • In the force sensor, special force sensors are used, which detect a force in the operation of the input device. These force sensors are expensive separate parts, whereby the total cost of such an input device is comparatively high. In addition, such force sensors often have a large footprint, which must be taken into account accordingly. These disadvantages have not yet been overcome in a satisfactory manner.
  • In this context is from the US 2010/0230181 A1 an input device comprising a first electrode positioned on a support side; a second electrode disposed on an operating side so as to face the first electrode with a space therebetween and move closer to the first electrode due to an operating pressure; a first capacitance detecting unit that detects a change in the electrostatic capacitance from a change in the potential or the current of the second electrode when a human finger has been brought closer to the second electrode; and a second capacitance detecting unit that detects a change in the electrostatic capacitance from a change in the potential or the current of the first electrode when the second electrode has been moved closer to the first electrode.
  • Furthermore, from the JP 2009 193 467 A1 a simplification of a process for installing a printed circuit board in a housing by forming a board mounting method and to eliminate processes for wire guide and the connection between printed circuit boards known. A component mounting plate includes a flexible circuit board having an opening at a predetermined position and at least one tie switch mounted on a first surface side when one side surface of the plate is referred to as a first surface and the other side surface of the plate is referred to as a second surface. The mounting plate has a flexible structure in which the second surface side is folded over the first surface side such that the opening of the plate is positioned over the dome switch on the first surface. This structure allows the board to be installed in the folded state in a predetermined case. After the circuit board is mounted, the dome switch on the first surface may be actuated through the opening from the second surface side in an operating surface of the housing.
  • Based on the above-mentioned prior art, the invention is therefore based on the object of specifying an input device with a force sensor for a vehicle, which is simple and inexpensive to manufacture, and which allows a comfortable operation.
  • The object is achieved according to the invention by the features of the independent claim. Advantageous embodiments of the invention are specified in the subclaims.
  • The invention thus provides an input device with a force sensor for a vehicle, with a bendable capacitive sensor layer, which has a plurality of capacitive sensor electrodes, and a control surface element, wherein the capacitive sensor layer has a first region which is held on the back of the control surface element, the capacitive Sensor layer has a second portion which is bent relative to the first region by 180 °, the capacitive sensor layer has a third region which is bent relative to the second region, between the first region and the second region, a holding element is arranged, and a compressible layer is arranged between the second region and the third region, wherein in each case a capacitive sensor electrode is arranged in the second region and the third region, and the second region and the third region with the compressible layer form a force sensor.
  • The basic idea of the present invention is therefore to form a force sensor in that two capacitive sensors are coupled together. The compressible layer can thereby influence a coupling of the two capacitive sensors by deforming the compressible layer upon application of a force, i. the compressible layer is compressed. This reduces the distance between the first capacitive sensor electrode and the second capacitive sensor electrode, whereby the coupling of the two capacitive sensors changes. The compression of the compressible layer depends on a force acting on it, so that a force sensor is formed by the two capacitive sensors together with the compressible layer. The capacitive sensor layer is thus formed in one piece and can be formed as known in the art to produce capacitive sensors, wherein the force sensor is formed by the use of the known capacitive sensor layer with the capacitive sensor electrodes with the compressible layer.
  • The capacitive sensor layer may extend beyond the region of the force sensor, the two capacitive sensor electrodes being arranged in the region of the force sensor to be formed. It is sufficient if the compressible layer is formed or arranged only in the region of the first and second capacitive sensor electrodes positioned one above the other. Due to the bendability of the capacitive sensor layer, it may deform, for example, when force is applied to the area of the compressible layer or undergo lateral displacement. By the holding element while a mechanical decoupling of the force sensor is achieved by the control surface element. In addition, haptic feedback may be provided upon actuation of the force sensor. Thereby, the input device is provided with a high ease of use.
  • Preferably, the capacitive sensor layer has the highest possible flexibility in order to achieve a small bending radius and to be able to provide a compact force sensor. Preferably, the capacitive sensor layer comprises a total of one or more carrier layers, which extend through the entire capacitive sensor layer. By bending over, the input device can essentially be formed from a single sensor layer, wherein different areas can assume different functions.
  • The two capacitive sensors in the second and third regions are jointly controlled and / or evaluated by a control circuit and / or evaluation circuit in order to determine a measure of the applied force. In each case, a force sensor formed in this way can be controlled and / or evaluated alone, or in combination with at least one further force sensor. The control circuit and / or evaluation circuit may be implemented separately from the input device, for example to perform a central evaluation of the force action, or as part of the input device. In this case, the input device can immediately output a measure of the force.
  • The input device is designed for use in a vehicle, for example as a control element for a component of the vehicle. In this case, the input device of a component may be permanently assigned, or be designed to operate a plurality of components of the vehicle.
  • The capacitive sensor layer has, in each case at least in the second and third regions, a capacitive sensor electrode, which can be arranged on the outside or inside the capacitive sensor layer. The capacitive sensor electrodes may, for example, have a planar design, or be arranged in a surface, for example a conductor which is arranged in a surface in a basically arbitrary shape, for example meandering or helical. In this case, each sensor electrode may comprise one or more electrically separated electrode elements, which together form the corresponding sensor electrode.
  • The capacitive sensor layer can each have a plurality of capacitive sensor electrodes in the second and third regions, which are arranged correspondingly one above the other to form a plurality of adjacent force sensors. In this case, the holding element and the compressible layer must extend correspondingly far to form the adjacent force sensors.
  • The compressible layer allows movement and / or deformation of the capacitive Sensor layer in the region of the force sensor thus formed by the compressible layer itself is compressed. This allows the first and second capacitive sensor electrodes to move relative to each other. The movement is preferably such that the two capacitive sensor electrodes move in a planar arrangement relative to each other. This can be enhanced in a deformation of the sensor layer. Typically, the movement of the two capacitive sensor electrodes is toward one another when a force is applied in one direction, while the two capacitive sensor electrodes move away from one another after the force has been applied. In this case, the capacitive sensor layer in the region of the force sensor can undergo the deformation in order to move the first and the second capacitive sensor electrodes relative to one another.
  • With the force sensor formed can be determined in principle any measure of the force. Typically, a corresponding electrical signal is generated that indicates the measure of the force. A measurement of the force is not required. By definition, an actuation of the force sensor takes place from one side of the capacitive sensor layer in the region of the first capacitive sensor electrode, wherein the first and the second capacitive sensor electrode can in principle be exchangeable.
  • The operating surface element provides an area for operating the input device. The control surface element can accordingly carry, for example, a label or other type of marking. In addition, the control panel may be configured, for example, with illumination to indicate feedback about a switching state of the input device, or the like. The control surface element can in principle have any size, starting, for example, the size of a fingertip for operation. The attachment of the capacitive sensor layer on the back of the control surface element causes a mechanical coupling in order to introduce a force into the force sensor via the control surface element.
  • The first region may also include one or more sensor electrodes. This allows the input device to allow input by proximity and / or touch, i. before a substantial force is exerted on the control surface element. An evaluation can in principle be made independently of the force sensor, or in combination with it. Also, sensor electrodes may be arranged offset from the force sensor in the first area.
  • In an advantageous embodiment of the invention, the capacitive sensor layer has a substrate layer and a dielectric layer, wherein the plurality of capacitive sensor electrodes is positioned between the substrate layer and the dielectric layer. The substrate layer can serve as a stabilizing carrier layer, while capacitive properties of the capacitive sensor layer can be influenced by the dielectric layer and adjusted by a suitable choice of a dielectric material. The arrangement of the substrate layer and the dielectric layer in the capacitive sensor layer causes the force sensor to face the dielectric layer or the substrate layer in each case. Both the substrate layer and the dielectric layer may have suitable deformability to enhance movement of the two capacitive sensor electrodes relative to one another by their deformation.
  • In an advantageous embodiment of the invention, the compressible layer on an air cushion, which is arranged between at least two support elements, and the air cushion is arranged in a region between the two sensor electrodes of the second and third region. By the support elements, a thickness of the air cushion and thus a possible movement of the two capacitive sensor electrodes can be set or specified relative to each other. Air is easily compressible so that the first and second sensor layers are well movable relative to each other. The support elements are preferably not or only slightly compressible. The support elements may be designed as punctiform, linear or planar support elements, which are arranged at least on two opposite sides of the air cushion. Also, circumferential support members may be connected to each other in the manner of a circumferential support ring.
  • In an advantageous embodiment of the invention, the at least two support elements are designed as self-adhesive or self-adhesive support elements. Thereby, the support members can be easily attached to the first or second capacitive sensor layer. The attachment of the support elements can be done at any time, for example, in the production of the sensor layer.
  • In an advantageous embodiment of the invention, the holding element is designed as a self-adhesive or self-adhesive retaining element. Thereby, the holding member can be easily attached to the first or second region of the capacitive sensor layer. The attachment of the holding element can take place at any time, for example in the production of the capacitive sensor layer.
  • In an advantageous embodiment of the invention, the input device has a support element, and the capacitive sensor layer abuts or is held by its third region on the support element. By the support element, compression of the compressible layer can be facilitated or enhanced. The support element is typically not or only slightly deformable itself. An actuation of the force sensor takes place correspondingly from one side of the capacitive sensor layer in the region of the first capacitive sensor electrode. The support element is preferably attached or held on the support element with an intermediate element. The intermediate element is further preferably designed to be elastic in order to effect a mechanical decoupling. Alternatively or additionally, the intermediate element can be made self-adhesive in order to facilitate attachment.
  • In an advantageous embodiment of the invention, the plurality of capacitive sensor electrodes for detecting an approach or a touch is executed. For the detection of the approach, the sensor electrode is designed based on a self-capacitance (self-capacitance). This also allows the detection of a touch, for example, with gloves. For the detection of the touch, the sensor electrode is designed based on a mutual capacitance (mutual mode). When detecting counter-capacitances, a more precise touch detection can be carried out, for example, by means of a high density of interpolatable electrode information. Each capacitive sensor electrode can be designed individually.
  • In an advantageous embodiment of the invention, one or more of the plurality of capacitive sensor electrodes designed as a capacitive guard electrode. The guard electrode improves electromagnetic compatibility to prevent problems with the operation of the input device. Also, an electrical coupling between the two sensor electrodes can be influenced by the influence of moisture or steam. Even such influences can be reduced with the guard electrode. In principle, any of the two sensor electrodes can be designed as a guard electrode in each force sensor. In the case of a plurality of sensor electrodes in the first region, one or more of the sensor electrodes there may be designed as a guard electrode.
  • In an advantageous embodiment of the invention, the input device has a fastening element which is arranged between the control surface element and the first region of the capacitive sensor layer. The fastening element is preferably made elastic, in order to effect a mechanical decoupling. Alternatively or additionally, the fastener may be self-adhesive to facilitate attachment. The fastening element can optionally be attached to the control surface element or to the capacitive sensor layer in the first region of the capacitive sensor layer.
  • In an advantageous embodiment of the invention, the control surface element is designed as a display element, in particular in the manner of an electronically controllable display element. The control surface element can thus be used to display information that is displayed on the display element. Thus, an input with the input element can be performed individually and adapted as needed.
  • In an advantageous embodiment of the invention, the input device has a haptic feedback element, which is arranged and designed to generate a haptic feedback upon actuation of the input device. The haptic feedback element can be embodied integrally with the control surface element. The generated haptic feedback can confirm an input via the input device.
  • In an advantageous embodiment of the invention, the input device has a plurality of force sensors, which are positioned on an underside of the operating surface element, in particular in corner regions of the operating surface element. Thus, an operation of the input device can be located on the control surface element on the control surface element, depending on a force on the individual force sensors. The input device may comprise a common connecting line for connecting the plurality of force sensors. In the case of a control surface element with display element, the display element can additionally be electrically connected via the connecting line. The connecting line is preferably designed in the manner of a ribbon cable. Not only can the operating position be deduced from a joint evaluation of several force sensors, but also a comparison with a sensor system for detecting an approach or a touch can be made. This comparison can be used for a security review. The sensor system for detecting the approach or the touch can be implemented together with the force sensor in the capacitive sensor layer. Alternatively, the first and / or second capacitive sensor electrodes may be driven to detect the touch.
  • In an advantageous embodiment of the invention, the input device has a connecting line, and the capacitive sensor layer is formed in the connecting line. This embodiment allows a simple and flexible Provision of the force sensor. A position of the force sensor on the underside of the control surface element can thus be selected as needed. If the connecting line is, for example, exchangeably connected to the control surface element, an adaptation to different requirements for operation via the control surface element can be carried out by exchanging the connecting line with a differently arranged or designed force sensor. The connecting line is preferably a connecting line for controlling a display element of the control surface element, in which additionally at least one force sensor is integrated. Again, the connecting line is preferably designed in the manner of a ribbon cable. This embodiment of the input device makes it possible to provide the force sensor only when it is used. The connecting line can be designed for electrical control of the control surface element. The connecting line can additionally serve for the electrical connection of the force sensors.
  • The invention will be explained in more detail with reference to the accompanying drawings with reference to preferred embodiments. The illustrated features may represent an aspect of the invention both individually and in combination. Features of various embodiments are transmittable from one embodiment to another.
  • It shows
    • 1 1 a schematic representation of an input device with a force sensor system formed by a continuous capacitive sensor layer and a holding element according to a first, preferred embodiment in a lateral sectional view;
    • 2 a schematic representation of an input device with a control surface element and four attached force sensors according to a second embodiment in a view from below, and
    • 3 a schematic representation of an input device with a control surface element and a trained in a connecting line force sensor according to a third embodiment in a view from below.
  • The 1 shows an input device 10 according to a first preferred embodiment for use in a vehicle, not shown, for example, as a control for a component of the vehicle. In this case, the input device of a component may be permanently assigned, or be designed to operate a plurality of components of the vehicle.
  • The input device 10 includes a control surface element 12 which has a surface for operating the input device 10 provides. The control surface element 12 has, for example, a label or other type of marking and illumination to provide feedback on a switching state of the input device 10 display. In an alternative embodiment, the control surface element 12 executed as an electronically controllable display element for displaying information.
  • The input device 10 includes a bendable capacitive sensor layer 14 which is a substrate layer 16 and a dielectric layer 18 having. The substrate layer 16 serves as a stabilizing carrier layer, and the dielectric layer 18 influences capacitive properties of the capacitive sensor layer 14 ,
  • Between the substrate layer 16 and the dielectric layer 18 is a plurality of capacitive sensor electrodes 20 . 21 . 22 . 24 arranged. The capacitive sensor electrodes 20 . 21 . 22 . 24 are flat or arranged in a surface, for example, meandering or spiral. In this case, each sensor electrode 20 . 21 . 22 . 24 comprise one or more electrically separated electrode elements, which together the corresponding sensor electrode 20 . 21 . 22 . 24 form.
  • The capacitive sensor layer 14 includes three areas 26 . 28 . 30 , the three areas 26 . 28 . 30 each by bending the capacitive sensor layer 14 are formed by 180 °. Accordingly, the capacitive sensor layer comprises 14 a first area 26 , the back of the control surface element 12 is held. This is between the control surface element 12 and the first area 26 the capacitive sensor layer 14 a fastener 32 adhesively attached. The fastener 32 is self-adhesive. The control surface element 12 is about the fastener 32 mechanically with the first area 26 the capacitive sensor layer 14 coupled.
  • At the first area 26 closes a second area 28 at the opposite of the first area 26 bent over 180 °. The capacitive sensor layer 14 has the highest possible flexibility to achieve a low bending radius. Between the first area 26 and the second area 28 is a holding element 34 arranged. The holding element 34 is in this embodiment as a self-adhesive or self-adhesive retaining element 34 executed.
  • To the second area 28 joins a third area 30 in turn, facing the second area 28 bent over 180 °. Between the second area 28 and the third area 30 is a compressible layer 36 arranged. The compressible layer 36 is here with an air cushion 38 executed, that between lateral support elements 40 is arranged. The support elements 40 are only slightly compressible. The support elements 40 are in this embodiment as a linear support elements 40 executed and on four sides of the air cushion 32 arranged. Alternatively, the support elements 34 be connected to each other in the manner of a circumferential support ring. The support elements 34 are as self-adhesive support elements 34 for adhesive attachment between the second and third areas 26 . 28 the capacitive sensor layer 14 executed.
  • In the first area 26 are first capacitive sensor electrodes 20 . 21 arranged in the second area 26 is a second capacitive sensor electrode 22 arranged, and in the third area 30 is a third capacitive sensor electrode 24 arranged. The capacitive sensor electrodes 20 . 21 . 22 . 24 are designed to detect a touch based on a mutual capacitance (mutual capacitance, mutual mode). Alternatively, the capacitive sensor electrodes 20 . 21 . 22 . 24 designed to detect an approach based on a self-capacitance (self-capacitance).
  • In the bent state are the second and third capacitive sensor electrode 22 . 24 so on top of each other that the second area 28 and the third area 30 with the compressible layer 36 a force sensor 42 form. The air cushion 38 is in a range between the second and third capacitive sensor electrode 22 . 24 arranged.
  • In the present embodiment, one of the first capacitive sensor electrodes 20 . 21 as a capacitive guard electrode 21 executed. At the force sensor 42 is the second capacitive sensor electrode in this embodiment 22 designed as a guard electrode.
  • The input device 10 further comprises a support element 44 at which the third area 30 the capacitive sensor layer 14 with an intermediate element 46 is attached. The support element 44 is itself not or only slightly deformable.
  • The input device 10 also has a haptic feedback element, not shown here, which is arranged and embodied, upon actuation of the input device 10 over the control panel element 12 to create a haptic feedback. By the elastic running fastener 32 In this case, a mechanical decoupling of the feedback element on the force sensor 42 causes.
  • The second and third capacitive sensor electrodes 22 . 24 in the second and third areas 28 . 30 are jointly controlled by a control circuit and / or evaluation circuit, not shown, and / or evaluated to determine a measure of an applied force. In each case, a force sensor formed in this way can be used 42 be driven and / or evaluated alone, or in combination with at least one other force sensor 42 , It can be determined in principle any measure of a force, wherein of the. Control circuit and / or evaluation circuit, a corresponding electrical signal is generated, which indicates the measure of the force.
  • In addition, the first capacitive sensor electrodes 20 in the first area 26 controlled by the control circuit and / or evaluation circuit and / or evaluated, in a conventional manner, an approach and / or a touch of the input device 10 capture.
  • The control circuit and / or evaluation circuit may be separate from the input device 10 be executed, for example, to perform a central evaluation of the force, or as part of the input device 10 ,
  • An operation of the input device 10 takes place from the side of the control surface element 12 , An applied force is applied via the fastener 32 and on the first area 26 the capacitive sensor layer 14 and on the holding element 34 transfer. From there, the force on the force sensor 42 transfer. The force sensor 42 itself is supported by the intermediate element 46 on the support element 44 from. This results in a compression of the air cushion 38 , This causes a shift of the second and third capacitive sensor electrodes 22 . 24 such that the second and third capacitive sensor electrodes 22 . 24 to move towards each other at a force in their planar arrangement, and vice versa according to the force.
  • 2 shows an input device 10 according to a second embodiment. The input device 10 The second embodiment is based on the input device 10 of the first embodiment, so that below only differences between the input devices 10 The first and second embodiments will be discussed in detail. In this case, details not described here again correspond to those of the input device 10 the first embodiment.
  • According to the second embodiment, the input device comprises 10 a rectangular control surface element 12 with four attached force sensors 42 , Each of the force sensors 42 is like with respect to the input device 10 The first embodiment described executed and arranged accordingly. The force sensors 42 are at the four corners of the control surface element 12 on an underside of the control surface element 12 arranged, and are controlled jointly by the control and evaluation circuit. The control and evaluation circuit is executed, an operation of the input device 10 over the control panel element 12 depending on a force on the individual force sensors 42 on the control surface element 12 to locate. The input device 10 includes a common connection line 50 for connecting the force sensors 42 , The connection line 50 is designed in the manner of a ribbon cable with a flexible, flat cable 52 and a plug 54 , The connection line 50 is split to the four force sensors 42 to build.
  • 3 shows an input device 10 according to a third embodiment. The input device 10 The third embodiment is based on the input device 10 of the first embodiment, so that below only differences between the input devices 10 The first and third embodiments will be discussed in detail. In this case, details not described here again correspond to those of the input device 10 the first embodiment.
  • According to the third embodiment, the input device comprises 10 a rectangular control surface element 12 , which is embodied here integrally as a display device. The input device 10 further includes a connection line 50 for connecting the control surface element 12 with the display device. The connection line 50 is designed in the manner of a ribbon cable with a flexible, flat cable 52 and a plug 54 , In the connection line 50 is a force sensor 42 arranged. The force sensor 42 corresponds to the force sensor 42 the first embodiment. The force sensor 12 is also over the connection line 50 electrically connected to the control and evaluation circuit.
  • LIST OF REFERENCE NUMBERS
  • 10
    input device
    12
    Control surface element
    14
    capacitive sensor layer
    16
    substrate layer
    18
    dielectric
    20
    first capacitive sensor electrode
    21
    first capacitive sensor electrode, guard electrode
    22
    second capacitive sensor electrode, guard electrode
    24
    third capacitive sensor electrode
    26
    first area
    28
    second area
    30
    third area
    32
    fastener
    34
    retaining element
    36
    compressible layer
    38
    bubble
    40
    support element
    42
    force sensor
    44
    supporting
    46
    intermediate element
    50
    connecting line
    52
    electric wire
    54
    plug
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • US 2010/0230181 A1 [0005]
    • JP 2009193467 A1 [0006]

Claims (13)

  1. An input device (10) having a force sensor system for a vehicle, having a bendable capacitive sensor layer (14) which has a plurality of capacitive sensor electrodes (20, 21, 22, 24), and a control surface element (12), wherein the capacitive sensor layer (14) a first region (26) which is retained on the back of the control surface element (12), characterized in that the capacitive sensor layer (14) has a second region (28) which is bent by 180 ° relative to the first region (26) in that the capacitive sensor layer (14) has a third region (30) that is bent by 180 ° relative to the second region (28), a holding element (34) between the first region (26) and the second region (28). is arranged, and between the second region (28) and the third region (30) a compressible layer (36) is arranged, wherein in the second region (28) and the third region (30) each have a capacitive sensor electrode (2 0, 21, 22, 24), and the second region (28) and the third region (30) with the compressible layer (36) form a force sensor (42).
  2. Input device (10) after Claim 1 characterized in that the capacitive sensor layer (14) comprises a substrate layer (16) and a dielectric layer (18), the plurality of capacitive sensor electrodes (20, 21, 22, 24) being between the substrate layer (16) and the dielectric layer (18). is positioned.
  3. An input device (10) according to any one of the preceding claims, characterized in that the compressible layer (36) comprises an air cushion (38) disposed between at least two support members (40) and the air cushion (38) in an area between the capacitive ones Sensor electrodes (20, 21, 22, 24) of the second and third regions (28, 30) is arranged.
  4. Input device (10) according to one of the preceding claims, characterized in that the at least two support elements (40) are designed as self-adhesive or self-adhesive support elements (40).
  5. Input device (10) according to any one of the preceding claims, characterized in that the input device (10) has a support element (44), and the capacitive sensor layer (14) with its third region (30) on the support element (44) abuts or held is.
  6. Input device (10) according to one of the preceding claims, characterized in that the plurality of capacitive sensor electrodes (20, 21, 22, 24) is designed to detect an approach or a touch.
  7. Input device (10) according to one of the preceding claims, characterized in that one or more of the plurality of capacitive sensor electrodes (20, 21, 22, 24) of the second region (28) or the third region (30) as capacitive guard electrode (21, 22 ) is executed.
  8. Input device (10) according to any one of the preceding claims, characterized in that the holding element (34) is designed as a self-adhesive or self-adhesive retaining element (34).
  9. Input device (10) according to one of the preceding claims, characterized in that the input device (10) has a fastening element (32) which is arranged between the control surface element (12) and the first region (26) of the capacitive sensor layer (14).
  10. Input device (10) according to any one of the preceding claims, characterized in that the control surface element (12) is designed as a display element, in particular in the manner of an electronically controllable display element.
  11. Input device (10) according to any one of the preceding claims, characterized in that the input device (10) comprises a haptic feedback element which is arranged and designed to generate a haptic feedback upon actuation of the input device (10).
  12. Input device (10) according to one of the preceding Claims 8 to 11 , characterized in that the input device comprises a plurality of force sensors (42) which are positioned on an underside of the control surface element (12), in particular in corner regions of the control surface element (12).
  13. Input device (10) according to one of the preceding claims, characterized in that the input device (10) has a connecting line (50), and the capacitive sensor layer (14) in the connecting line (50) is formed.
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