DE102004013819A1 - A switch including a pressure measurement layer with an operating surface, a pressure dependent resistor and an intermediate layer useful for automobile interiors - Google Patents

Abstract

Automobile interior switch including a pressure measurement layer (50) with an operating surface (85), at least one pressure dependent resistor, a plastic forming body on the side of the pressure measurement layer opposite operating surface (85), and an intermediate layer at least partially between the pressure measurement layer and the plastic forming body. Independent claims are included for:an automobile including the switch; #a process for preparation of the switch.

Description

The The invention relates to a switch for a motor vehicle.

A switch is eg from the DE 299 12 656 U1 known, wherein the functional element has keys, which are designed as at least partially translucent and / or reflective dome. The dome are designed by the means for illuminating the keys largely completely illuminated. The means for illuminating the keys are also connected to a carrier board. The means for illuminating the keys are mounted on the side of the carrier board, which is opposite to the side on which the keys are mounted. In addition, the means for illuminating the keys are housed in a housing. To improve the feel of the buttons, the dome can be made of transparent polyurethane. To produce the required switching process, the carrier material is equipped with contact springs that perform the electrical function of NO contacts when pressed down. In addition, it is provided that the carrier material is made translucent or cut out in the region of the means for illuminating the keys.

A switch is also eg from the DE 44 25 577 C2 known. So revealed the DE 44 25 577 C2 a switch cap for a lighted switch in a motor vehicle, wherein the switch cap is transparent and held on a housing of the switch and arranged behind the switch cap film has a printing on the switch cap facing side, wherein the printing has a low degree of reflection, not printed Surfaces of the film have a high degree of reflection and light emerging from a housing arranged in the light source is introduced laterally into the switch cap, so that it does not exit substantially and is reflected only on the non-printed surfaces so that it exits the switch cap. In addition, it is provided that the switch cap is sprayed onto the foil provided with the printing.

From the DE 197 17 740 C2 is a back-molded with a thermoplastic film plastic molded body with one or more integrated, optoelectronically active light fields with a arranged at least in the field of light fields translucent and cold stretchable, three-dimensionally deformed plastic film known, wherein on the back of the plastic film is a conductive Layer is applied as a transparent cover electrode, the back side at least in places coated with an electroluminescent layer and covered by an insulating layer, behind which a back electrode is printed from a conductive layer, which in turn is covered by an insulating layer.

It Object of the invention, one suitable especially for a motor vehicle Specify switch, especially in large numbers particularly economical can be produced.

The aforementioned Task is solved by a switch for a motor vehicle, wherein the switch a pressure measuring layer with a control surface and at least one arranged below the control surface pressure-dependent resistor having, on a side facing away from the control surface of the pressure measuring layer a plastic molding is arranged, and wherein at least partially between the pressure measuring layer and the plastic molding, in particular at least in the region of the pressure-dependent resistance, an intermediate layer is arranged. The plastic molding may e.g. made of PP, ABS, PC / ABS, ABS / PA or PC / PBT.

In Furthermore, an advantageous embodiment of the invention is the intermediate layer a foam sheet. The intermediate layer comprises in particular PU foam, PE foam or PP foam or is made of PU foam, PE foam or PP foam. The intermediate layer may alternatively or additionally comprise a textile layer, such as. Tile or fabric, or include such a textile layer.

In Furthermore, an advantageous embodiment of the invention is (indirectly or directly) on the control surface an electroluminescent Layer arranged.

In Furthermore, an advantageous embodiment of the invention is (indirectly or directly) on the electroluminescent layer, in particular transparent, partially transparent or semi-transparent, Protective layer arranged to represent a function of the switch.

In Furthermore, advantageous embodiment of the invention is above the control surface a protective layer arranged to represent a function of the switch.

In Furthermore, advantageous embodiment of the invention is between the pressure measuring layer and the intermediate layer an electroluminescent layer arranged.

In a further advantageous embodiment of the invention, the plastic molding is a behind foamed, embossed or back-injected plastic part.

In Furthermore advantageous embodiment of the invention is the pressure-dependent resistor an FSR element. The pressure-dependent Resistance advantageously comprises one, in particular one Side bounded by at least two electrodes, cavity. Of the Cavity is in a further advantageous embodiment of the invention on one of the limited by the at least two electrodes side turned away side by a layer of a semiconductive material, especially from a semiconducting polymer, limited.

The aforementioned Task is also - especially in conjunction with the aforementioned features - by a control panel for a motor vehicle solved, where the switch panel a pressure measuring layer with a control surface and has at least two arranged below the control surface pressure-dependent resistors, being facing away on one of the control surface Side of the pressure measuring layer is arranged a plastic molding, and wherein at least partially between the pressure measuring layer and the plastic molding, in particular at least in the area of pressure-dependent resistors, a Intermediate layer is arranged. It is in an advantageous embodiment the invention, the at least two pressure-dependent resistors associated with common electroluminescent layer.

The aforementioned Task is also - especially in conjunction with the aforementioned features - solved by a motor vehicle, wherein the motor vehicle a switch with a pressure measuring layer with a operating surface and at least one arranged below the control surface pressure-dependent resistor having, on a side facing away from the control surface of the pressure measuring layer a plastic molding is arranged, and wherein at least partially between the pressure measuring layer and the plastic molding, in particular at least in the region of the pressure-dependent resistance, an intermediate layer is arranged.

The aforementioned Task is also - especially in conjunction with the aforementioned features - by a method for manufacturing a switch for a motor vehicle solved, wherein a film comprising a pressure measuring layer with a control surface and at least one below the control surface arranged pressure-dependent Resistance, on a side facing away from the control surface with an intermediate layer together and / or connected. In an advantageous embodiment of the invention The film is previously or subsequently facing with one of the control surface Page placed in a form. In a further advantageous embodiment the invention, the film is then backfoamed with plastic, embossed or back-molded.

motor vehicle in the context of the invention is in particular an individual on the road usable land vehicle. Motor vehicles in the context of the invention especially not on land vehicles with internal combustion engine limited.

Further Advantages and details will become apparent from the following description of exemplary embodiments. Showing:

1 an interior view of a motor vehicle,

2 an embodiment of a switch panel,

3 a cross section through a pressure measuring film along the section line BB in 4 .

4 a cross section through the pressure measuring film according to 3 along the section line AA,

5 a cross section through an electroluminescent layer and

6 a method for producing a switch or switching panel for a motor vehicle.

1 shows an interior view of a motor vehicle 1 , The car 1 indicates one in a center console 2 arranged switching panel 3 on. Such or similar switching panel may alternatively or additionally also on a steering wheel 4 in a door 5 , or a control panel 7 be arranged.

2 shows an embodiment of the switching panel 3 in a three-dimensional exploded view. The switchboard 3 has a protective layer 20 for the representation of switches 11 . 12 . 13 . 14 . 15 and 16 and double switches 21 . 22 . 23 and 24 on, with the representations of the double switch 21 . 22 . 23 and 24 two representations of a switching element 32 and 33 . 34 and 35 . 36 and 37 respectively. 38 and 39 include. Below the protective layer 20 is an electroluminescent layer 40 with an illuminated area 41 and below the electroluminescent layer 40 a pressure measuring layer 50 with independently operable pressure-dependent resistors 51 . 52 . 53 . 54 . 56 . 57 . 58 . 59 . 60 . 61 and 62 arranged. Here is the pressure-dependent resistor 53 below the representation of the switch 11 arranged and thus the appearance of the switch 11 assigned. The pressure-dependent resistance 59 is below the representation of the switch 12 arranged and thus the appearance of the switch 12 assigned. The pressure-dependent resistance 60 is below the representation of the switch 13 arranged and thus the appearance of the switch 13 assigned. The pressure-dependent resistance 61 is below the representation of the switch 16 arranged and thus the appearance of the switch 16 assigned. The pressure-dependent resistance 62 is below the representation of the switch 15 arranged and thus the appearance of the switch 15 assigned.

The pressure-dependent resistance 51 is below the representation of the switching element 33 arranged and thus the representation of the switching element 33 assigned. The pressure-dependent resistance 52 is below the representation of the switching element 32 arranged and thus the representation of the switching element 32 assigned. The pressure-dependent resistance 54 is below the representation of the switching element 39 arranged and thus the representation of the switching element 39 assigned. The pressure-dependent resistance 56 is below the representation of the switching element 38 arranged and thus the representation of the switching element 38 assigned. The pressure-dependent resistance 57 is below the representation of the switching element 37 arranged and thus the representation of the switching element 37 assigned. The pressure-dependent resistance 58 is below the representation of the switching element 36 arranged and thus the representation of the switching element 36 assigned.

The representations of switches 11 . 12 . 13 . 14 . 15 and 16 or the representations of the switching elements 32 . 33 . 34 . 35 . 36 . 37 . 38 and 39 form together with their associated pressure-dependent resistors 51 . 52 . 53 . 54 . 56 . 57 . 58 . 59 . 60 . 61 and 62 and the associated illuminable area 41 the electroluminescent layer 40 Switch according to the claims.

Below the pressure measuring layer 50 is a plastic molding 80 arranged. The electroluminescent layer 40 can also be between the pressure measuring layer 50 and the plastic molding 80 be arranged. The protective layer 20 may be a film or a printed layer.

The protective layer 20 may be a foil, for example made of plastic. On this slide can the representations of switches 11 . 12 . 13 . 14 . 15 and 16 or the representations of switching elements 32 . 33 . 34 . 35 . 36 . 37 . 38 and 39 be printed. The protective layer 20 can also only from the representations of switches 11 . 12 . 13 . 14 . 15 and 16 or the representations switching elements 32 . 33 . 34 . 35 . 36 . 37 . 38 and 39 exist on the electroluminescent layer 40 or the pressure measuring layer 50 can be printed. Representations of switches 11 . 12 . 13 . 14 . 15 and 16 or the representations switching elements 32 . 33 . 34 . 35 . 36 . 37 . 38 and 39 For the purposes of the invention, their pictorial representation in a plane or their representation in the form of a three-dimensional contour may include.

Representations of switches 11 . 12 . 13 . 14 . 15 and 16 or the representations of switching elements 32 . 33 . 34 . 35 . 36 . 37 . 38 and 39 However, within the meaning of the invention, their masking in one plane or masking in the form of a three-dimensional contour may also comprise. In the case of masking, for example, an actual representation of a switch is shown 11 . 12 . 13 . 14 . 15 respectively. 16 or a switching element 32 . 33 . 34 . 35 . 36 . 37 . 38 respectively. 39 not (in the same way as an area outside the representation of the switch 11 . 12 . 13 . 14 . 15 respectively. 16 or the switching element 32 . 33 . 34 . 35 . 36 . 37 . 38 respectively. 39 ) printed. Rather, an area is outside the representation of the switch 11 . 12 . 13 . 14 . 15 respectively. 16 or the switching element 32 . 33 . 34 . 35 . 36 . 37 . 38 respectively. 39 printed or covered, giving a viewer the appearance of the switch 11 . 12 . 13 . 14 . 15 respectively. 16 or the switching element 32 . 33 . 34 . 35 . 36 . 37 . 38 respectively. 39 recognize and / or feel.

3 shows a cross section through a section of the pressure measuring film 50 along the section line BB in 4 in the range of the pressure-dependent resistance 53 as an exemplary embodiment of the embodiment of the other pressure-dependent resistors 51 . 52 . 54 . 56 . 57 . 58 . 59 . 60 . 61 and 62 , and 4 shows a cross section through a section of the pressure measuring film 50 along the section line AA in 3 , Here, reference numeral designates 90 a carrier film with a control surface 85 , Below the carrier foil 90 on one of the control surfaces 85 opposite side of the carrier film 90 , is a layer 91 composed of a semiconducting polymer. Under the shift 91 the semiconductive polymer is a spacer layer 92 with a recess 99 arranged. Under the spacer layer 92 is a carrier foil 93 for forming a cavity in the region of the recess 99 arranged.

In the recess 99 are on the carrier film 93 electrodes 95 and 96 arranged from a Silberleitpaste. The electrodes 95 and 96 have interdigitated electrode fingers 100 . 101 . 102 . 103 . 104 and 105 on. The electrodes 95 and 96 are over supply lines 98 and 97 connectable to an evaluation circuit, not shown, by means of which the electrical resistance between the electrodes 95 and 96 is measurable. Will sufficient pressure on the carrier film 90 or the carrier film 93 exercised, so touches the layer 91 from a semiconducting polymer the electrodes 95 and 96 , so that between the electrodes 95 and 96 Forming resistance bridges and thus the electrical resistance between the electrodes 95 and 96 reduce. The electrical resistance between the electrodes 95 and 96 is through the evaluation, not shown circuit measurable. If the electrical resistance falls below the electrodes 95 and 96 a certain limit, this is interpreted as switching.

Below the pressure measuring layer 50 on one of the control surfaces 85 opposite side 86 the pressure measuring layer 50 , is an intermediate layer 110 arranged. The intermediate layer 110 may be, for example, a foam sheet, for example made of PU foam, PE foam or PP foam. The intermediate layer 110 may alternatively or additionally comprise a textile layer, such as fleece or fabric. The intermediate layer 110 can - as in 3 shown - in an area at the recess 99 be limited. The intermediate layer 110 However, as in the following in 6 in the form of an intermediate foil 161 shown - in a larger or the entire area below the pressure measuring layer 50 be arranged.

The layer 91 from the semiconductive polymer, the spacer layer 92 with the recess 99 and the electrodes 95 and 96 form an embodiment of a pressure-dependent resistor in the sense of the claims.

Pressure measuring films can e.g. as so-called FSR elements from Electrade GmbH Elektronik, Lochhamer Schlag 10b, 82166 Gräfelfing, Germany (see also www.electrade.com/html/produkte/sensorik_fsr.htm) and Steadlands, PO Box 41, Blyth NE24 3YE, United Kingdom be obtained. In addition, the company IEE in Luxembourg (see also www.iee.lu/EN/PressRelease/PressRelease_01.php?prid=41) Slides with one electroluminescent layer and an FSR layer.

5 shows a cross section through a section of the electroluminescent layer 40 according to 2 , The electroluminescent layer 40 has a transparent electrode 140 , a transparent insulation layer 141 , a light-emitting layer (pigment layer) 142 , another insulation layer 143 and a return electrode 144 on.

The light-emitting layer (pigment layer) 142 may be formed of a material in which zinc sulfide (ZnS) is used as the base material and to which a small amount of a light-emitting core (Mn) is added. Light is emitted by means of the light-emitting layer (pigment layer) 142 by applying an alternating electric field across the transparent electrode 140 and the return electrode 144 , which are connected to unillustrated electrical contacts, emitted using a source of energy, not shown. In order to achieve a light emission luminance of 70 cd / m 2 or more with this electroluminescent layer, for example, the Mn concentration is about 0.4-0.6 wt% (as opposed to the zinc sulfide). Such an electroluminescent layer may be formed, for example, by a vacuum deposition method, atomic layer crystal growth (ALE), chemical vapor deposition or sputtering. For more details on the exemplary preparation of such an electroluminescent layer, the DE 43 32 209 A1 be removed.

The pigment layer 142 may also have ZnSe and / or ZnS / CdS or consist essentially of ZnSe and / or ZnS / CdS. Unless the pigment layer 142 consists essentially of ZnS, ZnSe and / or ZnS / CdS, this does not exclude that small amounts (in the percentage range) of other elements such as 0.4-0.6 wt .-% Mn are provided, ie, that the pigment layer 142 metal-doped.

Further possible embodiments of the electroluminescent layer 40 can the EP 0 699 730 B1 and the EP 0 915 640 B1 be removed.

The electroluminescent layer 40 can also be designed as a film.

It can be provided that the electroluminescent layer 40 according to 5 is constructed, wherein the electroluminescent layer 40 but outside the illuminable area 41 is masked. But it can also be provided that only the illuminable area 41 according to 5 is constructed.

6 shows an embodiment of a method for producing the switching panel 3 or a correspondingly constructed switch for the motor vehicle 1 , It is in one step 150 one the pressure measuring layer 50 having or the protective layer 20 , the electroluminescent layer 40 and the pressure measuring layer 50 comprising film 161 with one of the control surface 85 facing side 164 in a mold 160 placed. The step is followed by a step 151 in which one of the intermediate layer 110 corresponding intermediate foil 162 on one of the control surface 85 opposite side 165 the foil 161 placed and possibly connected to this. The steps 150 and 151 can also be done in reverse order.

Subsequently, the film 161 or the intermediate foil 162 in one step 152 with plastic 163 , eg PP, ABS, PC / ABS, ABS / PA or PC / PBT, foam-backed, embossed or back-injected. From the plastic 163 The plastic molding is formed 80 out.

It can also be provided that the protective layer 20 only after step 152 is applied in a further step.

The Elements and layers in the figures are taken into account of simplicity and clarity and not necessarily drawn to scale. Thus, e.g. the orders of magnitude of some elements or layers exaggerated over other Elements or layers shown in order to understand the embodiments to improve the present invention.

1

motor vehicle

2

center console

3

switch panel

4

steering wheel

5

door

7

operator

11,12,13,14,

15 16

presentation a switch

20

protective layer

21 22, 23, 24

presentation a double switch

32 33, 34, 35,

36 37, 38, 39

presentation a switching element

40

electroluminescent layer

41

illuminable Area

50

Pressure measuring layer

51 52, 53, 54,

56 57, 58, 59,

60 61, 62

pressure-dependent resistance

80

Plastics molding

85

operating surface

86 165

one operating surface opposite side

90, 93

support film

91

layer from the semiconducting polymer

92

spacer layer

95, 96

electrode

97 98

supply

99

recess

100 101, 102,

103 104, 105

electrode fingers

110

interlayer

140

transparent electrode

141 143

insulation layer

142

pigment layer / Light-emitting layer

144

back electrode

150 151, 152

step

160

shape

161

foil with a pressure measuring layer

162

intermediate film

163

plastic

164

one operating surface facing side

Claims (24)

Switch for a motor vehicle ( 1 ), wherein the switch is a pressure measuring layer ( 50 . 161 ) with a control surface ( 85 ) and at least one below the control surface ( 85 ) arranged pressure-dependent resistor ( 51 . 52 . 53 . 54 . 56 . 57 . 58 . 59 . 60 . 61 . 62 ), wherein on one of the control surface ( 85 ) facing away ( 86 . 165 ) of the pressure measuring layer ( 50 . 161 ) a plastic molding ( 80 ), and wherein at least partially between the pressure measuring layer ( 50 . 161 ) and the plastic molding ( 80 ) an intermediate layer ( 110 . 162 ) is arranged. Switch according to claim 1, characterized in that the intermediate layer ( 110 . 162 ) at least in the region of the pressure-dependent resistance ( 51 . 52 . 53 . 54 . 56 . 57 . 58 . 59 . 60 . 61 . 62 ) is arranged. Switch according to claim 1 or 2, characterized in that the intermediate layer ( 110 . 162 ) is a foam sheet. Switch according to claim 1, 2 or 3, characterized in that the intermediate layer ( 110 . 162 ) PU foam, PE foam or PP foam. Switch according to claim 4, characterized in that the intermediate layer ( 110 . 162 ) consists of PU foam, PE foam or PP foam. Switch according to claim 1, 2 or 4, characterized in that the intermediate layer ( 110 . 162 ) comprises a textile layer. Switch according to claim 1 or 2, characterized in that the intermediate layer ( 110 . 162 ) is a textile layer. Switch according to one of the preceding claims, characterized in that on the control surface ( 85 ) an electroluminescent layer ( 40 ) is arranged. Switch according to claim 8, characterized in that on the electroluminescent layer ( 40 ) a protective layer ( 20 ) is arranged to represent a function of the switch. Switch according to one of claims 1 to 8, characterized in that above the control surface ( 85 ) a protective layer ( 20 ) is arranged to represent a function of the switch. Switch according to one of claims 1 to 7 or 10, characterized in that between the pressure measuring layer ( 50 . 161 ) and the intermediate layer ( 110 . 162 ) an electroluminescent Layer ( 40 ) is arranged. Switch according to one of the preceding claims, characterized in that the plastics molding ( 80 ) is a foam-backed, embossed or hinterspritztes plastic part. Switch according to one of the preceding claims, characterized in that the pressure-dependent resistor ( 51 . 52 . 53 . 54 . 56 . 57 . 58 . 59 . 60 . 61 . 62 ) is an FSR element. Switch according to one of the preceding claims, characterized in that the pressure-dependent resistor ( 51 . 52 . 53 . 54 . 56 . 57 . 58 . 59 . 60 . 61 . 62 ) comprises a cavity. Switch according to claim 14, characterized in that the cavity on one side ( 164 165 ) by at least two electrodes ( 95 . 96 ) is limited. Switch according to claim 15, characterized in that the cavity on one of the at least two electrodes ( 95 . 96 ) limited side turned away through a layer ( 91 ) is limited from a semiconducting material. Switch according to Claim 16, characterized the semiconducting material is a semiconducting polymer. Switching panel ( 3 ), characterized in that it comprises at least two switches according to one of the preceding claims, wherein the at least two switches a common pressure measuring layer ( 50 . 161 ) exhibit. Switching panel ( 3 ) according to claim 18, characterized in that the at least two switches comprise a common electroluminescent layer ( 40 ) exhibit. Motor vehicle ( 1 ), characterized in that it comprises a switch according to one of claims 1 to 17 or a switch panel ( 3 ) according to claim 17 or 18. Method for producing a switch for a motor vehicle ( 1 ), characterized in that a film ( 161 ) comprising a pressure measuring layer ( 50 ) with a control surface ( 85 ) and at least one below the control surface ( 85 ) arranged pressure-dependent resistor, on one on one of the control surface ( 85 ) facing away ( 86 . 165 ) with an intermediate layer ( 110 . 162 ) is merged or connected. Method according to claim 15, characterized in that the film ( 161 ) with one of the control surface ( 85 ) facing side (164) in a form ( 160 ) is placed. Method according to claim 15, characterized in that the film ( 161 ) previously with one of the control surface ( 85 ) facing side (164) in a form ( 160 ) is placed. A method according to claim 16 or 17, characterized in that the film ( 161 ) or the intermediate layer ( 162 ) then with plastic ( 163 ) is backfoamed, embossed or injected behind.