DE102015216167A1 - Domestic appliance with fastening system, suitable fastening system and method for producing the household appliance - Google Patents

Abstract

The invention relates to a household appliance with a control panel, wherein the control panel has a fastening system 14, comprising (a) a first component 4, 11 with at least two arranged on a component surface pins 5, 6, 12, 13, wherein the respective cross-section of at least two Pins 5, 6, 12, 13 decreases with increasing distance from the component surface, starting from a maximum cross-section Qmax; and (b) a plastic film 1, 8 having at least two elongated holes 2, 3, 9, 10, each elongated hole 2, 3, 9, 10 having a central opening 2a, 3a, 9a, 10a and at least one lateral to the central opening 2a, 3a, 9a, 10a has incision 2b, 3b, 9b, 10b and the central opening 2a, 3a, 9a, 10a has a cross-section QL, which is smaller than a central cross-section Qmed him under the at least two pins 5, 6, 12, 13 associated pin; wherein the plastic film 1, 8 is fixed to the first component 4, 11 by the plastic film on the slots 2, 3, 9, 10 is placed on the pins 5, 6, 12, 13. The invention also relates to a method for producing the household appliance and a suitable for the household appliance fastening system.

Description

The invention relates to a household appliance with a control panel, a suitable fastening system and a method for producing the household appliance.

Domestic appliances generally include a control panel that provides the ability to set programs to be executed in the home appliance, as well as display information about the performance of a selected program and monitor an operating state of the domestic appliance. Domestic appliances here are, for example, laundry treatment appliances such as washing machines, dryers, and washer-dryers, dishwashers, microwave ovens, ovens and stoves, blenders, coffee machines, etc. The display of information and selected programs is generally carried out via an optical display.

Such control panels usually have design and / or functional plastic films which are mounted on components of the control panel. Such plastic films are then scattered films, for example, to illuminate a display evenly, or even touch foils in touch-sensitive displays. It may also be so-called design films, which may for example be provided with symbols and / or characters that are associated with an operation of the household appliance, and they may also be provided for example with patterns for the visual enhancement of the household appliance. It may also be the company logo displayed on such a slide.

Plastic films are glued to the attachment usually. However, such an assembly is costly by the adhesive job. In addition, the positioning and installation of an adhesive film is technically complicated and difficult. In addition, additional tools are required for mounting and it may also be necessary additional fasteners. It would therefore be desirable to simplify the installation of a plastic film in a control panel and to make cheaper.

Appliances with control panels are already known.

This is how the publication describes DE 103 06 497 A1 a control panel for household appliances in the form of a glass or glass-like plate, which is provided on the back with a milky coating, the display and controls are assigned, and on which these display and controls characterizing symbols are applied. The milky coating has a continuous recess in each case at the location where the respective symbol is to be applied. At the back in the region of this recess, a transparent plastic film provided with the respective symbol is applied to the plate.

The publication DE 10 2013 113 772 A1 describes a diaphragm component, in particular for a control panel for a household appliance. In this case, the diaphragm component has a cover layer, a sensor layer which covers a rear side of the cover layer at least in sections and a display layer with at least one discrete display element. In this case, the sensor layer is interposed between the covering layer and the at least one discrete display element, wherein the sensor layer is designed to detect operator inputs, in particular operator gestures. The sensor layer can be activated in sections as a function of a desired input mode and the at least one discrete display element can be activated for selective operator guidance.

The publication DE 10 2008 054 808 B3 describes a household appliance and a kitchen furniture with a mechanically flexible display unit, wherein the display unit is rolled up.

Against this background, it was an object of the present invention to provide a household appliance with an improved control panel. Preferably, the attachment of plastic films to components should be simplified. In addition, a method for producing such a household appliance is to be provided.

The solution of this object is achieved according to this invention by a household appliance, a method for producing this household appliance and a fastening system with the features of the corresponding independent claims. Preferred embodiments of the household appliance according to the invention and of the method according to the invention and the fastening system according to the invention are listed in the respective dependent claims. Preferred embodiments of the household appliance according to the invention correspond to preferred embodiments of the method according to the invention or of the fastening system according to the invention and vice versa, even if this is not explicitly stated herein.

• (a) ein erstes Bauteil mit mindestens zwei auf einer Bauteiloberfläche angeordneten Stiften, wobei der jeweilige Querschnitt von mindestens zwei Stiften mit zunehmender Entfernung von der Bauteiloberfläche, ausgehend von einem maximalen Querschnitt Q_max, abnimmt; und
• (b) eine Kunststofffolie mit mindestens zwei Langlöchern, wobei jedes Langloch eine zentrale Öffnung sowie mindestens einen seitlich zur zentralen Öffnung angebrachten Einschnitt aufweist und die zentrale Öffnung einen Querschnitt Q_L hat, der kleiner ist als ein mittlerer Querschnitt Q_med eines ihm unter den mindestens zwei Stiften zugeordneten Stiftes;

wobei die Kunststofffolie an dem ersten Bauteil befestigt ist, indem die Kunststofffolie an den Langlöchern auf die Stifte gesteckt ist.The invention thus relates to a household appliance with a control panel having a fastening system containing

• (A) a first component having at least two arranged on a component surface pins, wherein the respective cross section of at least two pins with increasing distance from the Part surface, starting from a maximum cross-section Q _max , decreases; and
• (B) a plastic film having at least two slots, each slot having a central opening and at least one laterally to the central opening mounted incision and the central opening has a cross-section Q _L , which is smaller than a central cross-section Q _med of him under the at least two pins associated pin;

wherein the plastic film is attached to the first component by the plastic film is stuck to the slots on the pins.

The term control panel is not limited according to the invention, as long as it can serve to allow a user to operate the household appliance to inform him about operating conditions and / or as a design element for the household appliance. Operator panels are generally planar, often elongated elements of a household appliance, comprising, depending on the configuration, at least a first component and a plastic film. A control panel can be designed very differently depending on the type of household appliance and price segment. A control panel may for example be a full-touch display, in which the operation is carried out exclusively by touching a user on a touch screen. The control panel can also have a touch display only in some areas. Here, the touchscreen can then be used as an indicator, for example in connection with mechanical input aids, such as rotary voters, buttons and / or buttons. But it is also possible that the touch screen is then used as an additional control element, for example, a further setting of program parameters for manually selected via buttons or voters programs of a household appliance could be possible. A control panel can also be operated only manually and have, for example, rotary voters, buttons and buttons. A control panel may additionally have design elements. These may, for example, be colored, transparent, provided with patterns, symbols and / or characters. The control panel can also be illuminated. For this purpose, for example, individual light elements, but also light wells can be provided.

The material of the components can be very different, for. As glass, glass ceramic, plastic, metal and / or combinations of these materials. According to the invention, components made of a plastic are preferred. For the production of such a component a variety of methods are usually suitable, which are dependent on the material and shape of the component. The component is preferably produced as a molded part by means of injection molding.

Components for control panels can have a wide variety of forms and z. B. assume an edgy, rounded, but also a complex shape. In any case, a plastic film can be positioned on the component.

In a preferred embodiment of the household appliance, the oblong hole has at least two lateral incisions which are arranged uniformly around the central opening. In the case of two lateral incisions, this means in particular that they are arranged on opposite sides of the central opening. In the case of three lateral incisions this means in particular that each two incisions with the central opening, or its center, form an angle of 120 °.

The shape of the central opening is not restricted according to the invention. So the central opening can be round or angular. Preferably, the central opening is round, so in particular circular or elliptical. Preferably, the central opening forms a circle. However, even angular shapes such as a square, a rectangle or a regular n-corner (n ≥ 5) are possible.

The term "incision" has to be interpreted broadly. Thus, this may be an incision per se in which no foil material has been removed, or an incision with recesses, ie an incision in which the central opening is widened around a laterally arranged recess.

In a preferred embodiment of the household appliance, the at least one lateral incision has no recesses.

"Long hole" means in the context of the invention in particular that central opening and incision or incisions are connected to each other and in particular form a single opening. The "cross-section Q" therefore refers to the proportion of the central opening in the entire cross section of the single opening, when extrapolating its shape in the region of the single opening in which the incisions are arranged.

The positioning of the slots in the plastic film is not limited according to the invention. However, in general, the positioning is chosen so that the plastic film can be mounted on the first component. Also, the number of slots within a plastic film according to the invention is not further limited. If necessary, a plastic film can also have a multiplicity of oblong holes.

The shape of the slot is not further limited according to the invention. A central opening as well as the lateral incisions can have any shape. For example, a central opening may be circular, but also elliptical. In general, the shape of the central openings will be adapted to the shape of the pins. The incisions may be, for example, mere incisions without recesses. But it can also be a rectangular incision with edged or rounded ends. The incision may also taper or widen to the end. Also, the number of incisions is limited according to the invention only insofar as a central opening has at least one lateral incision.

Operator panels generally comprise at least one plastic film. In this case, such a plastic film usually have a variety of very different functions (functional films), with the name often depends on their main function, but usually several functions are met simultaneously. For example, scattering films are used on light wells for a better and more uniform distribution of the light. Touch foils are used, for example, in touch displays, wherein the touch foil may then comprise guide and / or sensor structures and optionally also electronic components which enable a user to make inputs via a contact which generates an electrical signal. On display films characters and / or symbols are usually arranged, which certain functions of the household appliance are assigned, which can then be set via the control panel of a user. Such films are usually backlit for better representation of symbols and / or characters. Plastic films in control panels can also be protective or covering films. It may also be design films, which may be provided for example with patterns and / or logos.

The plastic film can therefore be designed very differently. The film may be at least partially transparent. The film can be colored, with all colors including black, white and grayscale conceivable. Symbols, characters including letters, numbers and special characters, patterns and / or logos can also be arranged on the film. The film may also be provided with functional elements, such as sensor electrodes, interconnects and / or electronics. As used herein, the term "functional element" means any element that has an effect beyond the optical effect.

The production of a printed plastic film can generally be done in many ways, but is often dependent on their nature and the desired use. Possible printing methods are, for example, screen printing methods, inkjet or laser printing methods.

The shape of the plastic film according to the invention is also not limited. It can be edgy, rounded or take on complex shapes. In any case, the shape of the plastic film is adapted to the component on which it is positioned.

The material of the plastic film is not limited according to the invention. However, it has been found that the invention is particularly advantageous when the plastic film contains or consists of a polymer which is selected from the group consisting of polycarbonate, polyethylene terephthalate, polyethylene, polypropylene, polyoxymethylene, ABS and polyetheretherketone. The plastic film preferably consists of one or more of these polymers, preferably one of these polymers. The term "consists" here is to be interpreted so that the plastic film in addition to the polymer or the other additives such as plasticizers, dyes, etc. may contain.

It has proven to be advantageous according to the invention if the plastic film has a thickness in the range of 0.05 mm to 0.3 mm.

According to the invention, a household appliance is preferred in which the plastic film has a light-scattering property. The plastic film is then particularly well suited for use in a display.

Since the invention is particularly suitable for use in a display of the household appliance, in a preferred embodiment of the household appliance, the first component is a light well of a display. In this case, it is also preferred if the plastic film is a polycarbonate film. In a preferred embodiment of the household appliance according to the invention, namely, the control panel is illuminated. In this case, the fastening system comprises as a first component a generally rectangular light shaft matrix. At two outer corners of the light well matrix, preferably along one of the longer edges, then z. B. two frustoconical pins each arranged 2 mm in diameter. For this purpose, the edge of the light shaft matrix can preferably be made wider or framed. In any case, the pins are arranged so that they do not affect the visual appearance of the control panel in the assembled state. The fastening system in this embodiment preferably comprises, as a plastic film, a polycarbonate film having a light-scattering effect. This is preferably 0.15 mm thick. The shape of the polycarbonate film is usually chosen so that it measures the surface of the Lichtschachtmatrix corresponds. At positions corresponding to the pins, the polycarbonate film has, for example, two elongated holes. The oblong holes preferably each have a circular central opening with a diameter of 1.95 mm. Preferably, two lateral incisions are arranged opposite to each other at each central opening. The incisions have, for example, a rectangular shape with a rounded end, the width of the incisions being 1 mm in each case and the length in each case 2.5 mm. When attaching the plastic film to the slots on the pins, the polycarbonate film deforms through the incisions, the deformed film parts with the pins undergo a mediated for example by adhesion or friction mechanical connection. In this way, a mechanical fastening connection can be made between the polycarbonate film and the light well matrix.

In the case of the pins used according to the invention, the respective cross section of at least two pins decreases with increasing distance from the component surface, starting from a maximum cross section Q _max . If this condition is met, any pins can be used. However, it has been shown that the arranged on the first component at least two pins preferably have substantially the shape of a cylinder and / or a truncated cone.

In a particularly preferred embodiment of the invention, the pins in an upper part facing away from the component surface have the shape of a cylinder, whereas in the lower part facing the component surface they have the shape of a truncated cone which is rounded outwards in the contact area with the component surface. In this form, in particular when the proportion of the cylindrical shape, based on the length of the pin, is 50 to 90%, not only a stable connection of component and plastic film is achieved with a comparatively low use of material. At the same time, an embodiment is realized in which the pins are particularly protected against breakage.

For fastening a plastic film positioned on a first component, the component has at least two pins. The positioning of the pins on the component is not limited according to the invention. The pins may for example be placed centrally on the component, along an edge or in the corners of the component. The pins can be retrofitted on the component or made as a unit with the component, for example by injection molding. A first component can also have a plurality of pins if required.

The material of the pins is not limited according to the invention. The pins can be made of the same material as the component on which they are mounted. The material can also be different from that of the component. Possible materials such as plastic, metal, glass or glass ceramic. Compounds of different materials are also possible. Preferably, however, pins made of plastic are used. Particularly preferably, the pins are used as a unit with the component as a one-piece molded part.

The size of a slot and the size of a pin are not limited according to the invention. They are generally chosen so that a good mechanical connection between the first component and the plastic film can be made. However, it is preferable if a pin has an average diameter of 1 mm to 3 mm in the case of a circular cross section, more preferably 1.5 to 2 mm. The maximum deviations from the average diameter are generally less than 20%.

For producing a mechanically stable attachment, d. H. Fastening compound, the plastic film is generally stuck over the slots, in particular their central openings on the pins. The plastic film deforms due to the lateral cuts. The deformed parts of the plastic film press on the surface of the pins and thus form a fastening connection. In this way, advantageously, a fastening connection can be realized entirely without the use of auxiliary materials such as adhesive.

In particular, it is advantageous for optimum deformation of the plastic film when, in the case of circular central openings and pins, the diameter of a pin is greater than the diameter of the central opening of a slot. In this way, a bending up of the plastic film due to the or the side incisions can be achieved. The ratio of the diameter of a pin to the diameter of a central opening is not limited according to the invention. However, it is preferable that the diameter of a central opening is smaller by 0.03 to 0.07 mm than that of a pin, and it is particularly preferable that the diameter of the central opening is 0.04 to 0.05 mm smaller.

For a plastic film to deform according to the invention, it must be flexible to a degree. The flexibility of a plastic film depends on the material used and will generally be different. Therefore, the aforementioned materials are preferably used. An optimal deformation of the film is therefore According to the invention also determined by the size and shape of the lateral cuts of the slots. It is preferred that with increasing flexibility of the film, the size of the incisions and / or any recesses therein may be smaller. The cuts are preferably also designed so that the plastic film does not tear when plugging.

In a further preferred embodiment of the household appliance according to the invention, the control panel is designed as a touchscreen and comprises a fastening system in which the first component is a display panel of transparent plastic. This can preferably be provided with a frame made of opaque plastic. On the side facing away from the user cylindrical pins are arranged at two opposite corners of the display screen. Each pin has, for example, a diameter of 1.5 mm. The plastic film in this embodiment is a touch foil, preferably made of polypropylene. According to the invention, the touch foil has two elongated holes at positions corresponding to the pins. The respective slot has, for example, a circular central opening with a diameter of 1.45 mm with two oppositely arranged incisions of 2.5 mm in length. To attach the touchscreen on the display screen, the plastic film is placed on the slots corresponding to the pins. When plugging over the pins, the touch foil deforms in particular due to the incisions, the deformed foil parts forming a mechanically stable connection with the pins, so that overall a mechanical attachment connection between the touch foil and the display disc results. In particular, in this embodiment, the display screen may also be provided with a barrier pressure, so that the arrangement of conductor tracks and sensor electrodes is invisible to a user.

In a particularly preferred embodiment of the household appliance according to the invention, the plastic film is therefore a touch foil which has sensor electrodes which generate an electrical signal upon contact. It has been shown here that the invention makes possible a particularly good fastening of the touch foil and at the same time the adhesives which are disadvantageous for a touch display are not required for fastening.

Basically, touch sheets according to the invention are not limited, as long as they can convert touches of an external input unit into signals that can be processed by a control device for controlling the household appliance. Preferably, however, a capacitive touch foil is used. The capacitive touch foil preferably comprises at least one sensor electrode, which by proximity and / or contact with an external input unit can generate an electrical signal caused by changes in the electrical capacitance. The touch foil particularly preferably has a coordinate network of sensor electrodes. As a rule, an insulating material, a so-called dielectric, is located between the sensor electrodes. The capacitance at the crossing points of the sensor electrodes is generally detected by a circuit. The coordinate network may be formed of electrodes by the application of a patterned, electrically conductive material. The structuring may have many forms from simple geometric shapes such as circles, rectangles, etc., to complicated irregular shapes, but lines in the X and Y directions are also possible. The electrically conductive material is preferably transparent and is, for example, indium tin oxide (ITO). However, transparent and conductive lacquers and / or adhesives can also be used with particular preference. The electrically conductive sensor electrodes and circuits are generally produced by sputtering or screen printing. The touch foil is usually connected to an evaluation electronics, which is necessary to detect and evaluate a caused by changing the electrical capacitance electrical signal. The term "evaluation" usually includes electronic components, interconnect structures, solder joints and possibly other components. The evaluation electronics are generally connected to the control device of the household appliance. The touch foil according to the invention preferably has a flexible design, can be transparent and is made of a plastic. It can be configured in one or more layers.

Depending on the type and design of the control panel, it may be important that the plastic film is positioned particularly level. In a particularly preferred embodiment of the household appliance according to the invention, therefore, the control panel in addition to the first and on a second component. Material, production, type and shape of the second component are not limited according to the invention. However, the second component is generally configured such that it can snap into the first component and can evenly position a plastic film between the two components. For this purpose, it is possible that the second component, corresponding to the positions of the pins on the first component, that is associated therewith, has recesses. In this way, the pins, which are arranged on the first component, sink into the second component, so that an overlying connection of the two components is made possible. In particular, the connection of the two components may also be sealed, so that the plastic film arranged therebetween is protected against moisture and / or contamination is. In any case, the invention is particularly advantageous if the fastening system used additionally has a second component with at least two recesses, which are then generally associated with the at least two pins. Then a particularly tight connection between the first component, plastic film and second component can be achieved.

It should be noted at this point that the term "plastic film" here also includes several separate plastic films and laminates. Preferably, however, a single plastic film is used according to the invention. In general, the second component is latched to the recesses in the first component, such that the plastic film is just positioned between the two components.

The term household appliance is to be interpreted broadly according to the invention. According to the invention, all types of household appliances are possible. Household appliances can be both large appliances such as washing machines, refrigerators, dryers, dishwashers or cooking appliances, but also small appliances such as coffee machines, kitchen appliances, blenders and the like. In any case, the household appliance has a control panel.

However, according to the invention, a water-conducting domestic appliance which is selected from the group consisting of a washing machine, a dryer, a washer-dryer and a dishwasher is preferred.

Most preferably, the household appliance is a washing machine or a washer-dryer.

• (a) ein erstes Bauteil mit mindestens zwei auf einer Bauteiloberfläche angeordneten Stiften, wobei der jeweilige Querschnitt von mindestens zwei Stiften mit zunehmender Entfernung von der Bauteiloberfläche, ausgehend von einem maximalen Querschnitt Q_max, abnimmt; und
• (b) eine Kunststofffolie mit mindestens zwei Langlöchern, wobei jedes Langloch eine zentrale Öffnung sowie mindestens einen seitlich zur zentralen Öffnung angebrachten Einschnitt aufweist und die zentrale Öffnung einen Querschnitt Q_L hat, der kleiner ist als ein mittlerer Querschnitt Q_med eines ihm unter den mindestens zwei Stiften zugeordneten Stiftes; wobei die Kunststofffolie an dem ersten Bauteil befestigt ist, indem die Kunststofffolie an den Langlöchern auf die Stifte gesteckt ist; umfassend die Schritte:
• (i) Bereitstellen eines Haushaltsgerätes mit dem ersten Bauteil; und
• (ii) Aufstecken der Kunststofffolie an den Langlöchern auf die Stifte.

The invention also relates to a method for producing a domestic appliance with a control panel, which has a fastening system containing

• (A) a first component having at least two arranged on a component surface pins, the respective cross-section of at least two pins with increasing distance from the component surface, starting from a maximum cross-section Q _max , decreases; and
• (B) a plastic film having at least two slots, each slot having a central opening and at least one laterally to the central opening mounted incision and the central opening has a cross-section Q _L , which is smaller than a central cross-section Q _med of him under the at least two pins associated pin; wherein the plastic film is attached to the first component by the plastic film is stuck to the slots on the pins; comprising the steps:
• (i) providing a household appliance with the first component; and
• (ii) Placing the plastic film on the slots on the pins.

• (a) ein erstes Bauteil mit mindestens zwei auf einer Bauteiloberfläche angeordneten Stiften, wobei der jeweilige Querschnitt von mindestens zwei Stiften mit zunehmender Entfernung von der Bauteiloberfläche, ausgehend von einem maximalen Querschnitt Q_max, abnimmt; und
• (b) eine Kunststofffolie mit mindestens zwei Langlöchern, wobei jedes Langloch eine zentrale Öffnung sowie mindestens einen seitlich zur zentralen Öffnung angebrachten Einschnitt aufweist und die zentrale Öffnung einen Querschnitt Q_L hat, der kleiner ist als ein mittlerer Querschnitt Q_med eines ihm unter den mindestens zwei Stiften zugeordneten Stiftes;

wobei die Kunststofffolie an dem ersten Bauteil befestigt werden kann, indem die Kunststofffolie an den Langlöchern auf die Stifte gesteckt wird.Finally, the subject of the invention is also a fastening system comprising

• (A) a first component having at least two arranged on a component surface pins, the respective cross-section of at least two pins with increasing distance from the component surface, starting from a maximum cross-section Q _max , decreases; and
• (B) a plastic film having at least two slots, each slot having a central opening and at least one laterally to the central opening mounted incision and the central opening has a cross-section Q _L , which is smaller than a central cross-section Q _med of him under the at least two pins associated pin;

wherein the plastic film can be attached to the first component by the plastic film is stuck to the slots on the pins.

In a preferred embodiment of this fastening system, each slot around the central opening has at least two notches without recesses arranged symmetrically with respect to the central opening.

The shape of the pins is not restricted according to the invention. Preferably, however, the shape of the pins corresponds to the shape of the central openings in the oblong holes. Preferably, the pins have a circular cross-section, wherein the average diameter D _{M of} a pin is in the range of 1 to 3 mm. Finally, it is inventively preferred that the pins have substantially the shape of a cylinder or a truncated cone. Moreover, it is preferred according to the invention that the diameter of a central opening in the oblong hole is smaller by 0.03 to 0.07 mm than the diameter of an associated pin.

As used herein, the term "associated" means, in particular, that it is particularly intended for attachment to insert a particular pin into a particular slot. The assignment of the respective sizes of slot and pin can depend. If z. B. two pins each have the same shape and dimension and two slots also each have the same shape and dimension, then a pin may even be assigned to both slots, since the pins can be interchangeable here. However, the assignment may also depend on the shape of the plastic film and the arrangement of the slots depend, since these can be determined by both.

The invention has numerous advantages. The fastening system allows cost-effective installation of plastic films on components, since no adhesive application is necessary. The assembly by coating or attaching the film on the pins is also easy compared to the attachment of an adhesive film. An attachment is already present through the pins on the component. On other fastening components or additional tooling can thus be omitted in this fastening system.

Further details of the invention will become apparent from the following description of non-limiting embodiments. Here, reference is made to the 1 and 2 ,

1 shows a schematic representation of a first embodiment of a fastening system according to the invention, which contains a plastic film with two elongated holes arranged thereon and a first component with two cylindrical pins arranged thereon.

2 shows a schematic representation of a second embodiment of a fastening system according to the invention, which contains here as a plastic film a touch foil with two elongated holes arranged thereon and a first component with two frustoconical pins arranged thereon.

1 shows in a non-limiting embodiment in particular a fastening system which is used in a control panel, wherein the fastening system is a plastic film 1 made of polycarbonate and a first component 4 , which is designed as a cover plate contains. For clarity, the control panel and the household appliance according to the invention containing these are not shown. The polycarbonate film 1 out 1 has two slots 2 . 3 on. Each of the slots 2 . 3 includes a central circular opening 2a . 3a with laterally arranged connected incisions 2 B . 3b , which are arranged opposite to each other. The diameter of the central openings 2a . 3a is 1.95 mm in this non-limiting embodiment. The cuts 2 B . 3b are here designed with rectangular recesses with an angular end and each have a width of 1 mm and a length of 2.5 mm. The two slots 2 . 3 are in this embodiment in the two upper corners of the polycarbonate film 1 arranged. The thickness of the film 1 is 0.15 mm. The positions of the oblong holes 2 . 3 in the polycarbonate film 1 correspond to the positions of the two, on the cover plate 4 arranged pins 5 . 6 , The pencils 5 . 6 are cylindrical and have a diameter of 2 mm. The cover plate 4 is along with the two pins 5 . 6 as a one-piece molding made of plastic. For fixing the polycarbonate film 1 on the cover plate 4 can this over the slots 2 . 3 on the pins 5 . 6 be plugged. By attaching the polycarbonate film deforms 1 in the areas of the oblong holes 2 . 3 , The slightly deformed parts of the film 1 press on the pins 5 and 6 and thus form a mechanical fastening connection.

2 shows in a non-limiting embodiment, in particular a fastening system, which as a plastic film 8th contains a touch foil and a plastic plate 11 as the first component. The shape of the touch foil corresponds to the shape of the plastic plate 11 , The touch foil 8th consists of polypropylene with a thickness of 0.15 mm. On the polypropylene film 8th is a coordinate network of sensor electrodes 7 made of indium tin oxide (ITO). The grid lines are arranged in the X and Y directions. Between the electrodes, the polypropylene film acts 8th as a dielectric. A circuit not shown here serves to measure the capacitances at the crossing points of the electrodes. Touching, which cause a change in capacitance as electrical signals are processed by an evaluation not shown here and transmitted to a control device of a household appliance. The touch foil 8th has for attachment to the plastic plate 11 two long holes 9 . 10 on which at opposite corners of the touch foil 8th are arranged. Each of the slots 9 . 10 includes a circular central opening 9a . 10a with a diameter of 1.45 mm. At every central opening 9a . 10a are two cuts 9b . 10b in the form of simple cuts, ie without recesses, with a length of 2 mm. The cuts 9b . 10b are each arranged opposite each other. The positions of the two pins arranged on the plastic plate 12 . 13 correspond to the positions of the slots 9 . 10 in the touch foil, so these are assigned. The pencils 12 . 13 are frusto-conical shaped with a lower diameter of 1.5 mm. The plastic plate 11 is made including the pins as a one-piece molding. For attaching the touch foil 8th on the plastic plate 11 can the touch foil 8th on the long holes 9 . 10 on the pins 12 . 13 be plugged. By attaching the touch foil deformed 8th in the areas of the oblong holes 9 . 10 , The deformed parts of the film 8th then make with the pins 12 . 13 a mechanical fastening connection.

LIST OF REFERENCE NUMBERS

1

Plastic film

2

Long hole

2a

Central opening, circular opening

2 B

Incision; Incision with rectangular recess and angular end

3

Long hole

3a

Central opening, circular opening

3b

Incision; Incision with rectangular recess and angular end

4

Cover plate, first component

5

Cylindrical pin

6

Cylindrical pin

7

Grid of sensor electrodes

8th

designed as a touch foil plastic film

9

Long hole

9a

Central opening, circular opening

9b

Incision without recess

10

Long hole

10a

Central opening, circular opening

10b

Incision without recess

11

Plastic plate, first component

12

Truncated cone shaped pin

13

Truncated conical pin

14

fastening system

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• DE 10306497 A1 [0006]
• DE 102013113772 A1 [0007]
• DE 102008054808 B3 [0008]

Claims (14)

Domestic appliance with a control panel, characterized in that the control panel a fastening system ( 14 ), comprising (a) a first component ( 4 . 11 ) with at least two pins arranged on a component surface ( 5 . 6 . 12 . 13 ), wherein the respective cross-section of at least two pins ( 5 . 6 . 12 . 13 ) decreases with increasing distance from the component surface, starting from a maximum cross-section Q _max ; and (b) a plastic film ( 1 . 8th ) with at least two oblong holes ( 2 . 3 . 9 . 10 ), each slot ( 2 . 3 . 9 . 10 ) a central opening ( 2a . 3a . 9a . 10a ) and at least one laterally to the central opening ( 2a . 3a . 9a . 10a ) incision ( 2 B . 3b . 9b . 10b ) and the central opening ( 2a . 3a . 9a . 10a ) has a cross-section Q _L which is smaller than a median cross-section Q _{med of} one of the at least two pins ( 5 . 6 . 12 . 13 ) associated pin; the plastic film ( 1 . 8th ) on the first component ( 4 . 11 ) is attached by the plastic film on the slots ( 2 . 3 . 9 . 10 ) on the pins ( 5 . 6 . 12 . 13 ) is plugged. Domestic appliance according to claim 1, characterized in that the slot ( 2 . 3 . 9 . 10 ) at least two lateral cuts ( 2 B . 3b . 9b . 10b ) evenly around the central opening ( 2a . 3a . 9a . 10a ) are arranged. Domestic appliance according to claim 1 or 2, characterized in that the at least one lateral incision ( 2 B . 3b . 9b . 10b ) has no recesses. Domestic appliance according to one of the preceding claims, characterized in that the plastic film ( 1 . 8th ) contains or consists of a polymer selected from the group consisting of polycarbonate, polyethylene terephthalate, polyethylene, polypropylene, polyoxymethylene, ABS and polyetheretherketone. Domestic appliance according to one of the preceding claims, characterized in that the plastic film ( 1 . 8th ) has a thickness in the range of 0.05 mm to 0.3 mm. Domestic appliance according to one of the preceding claims, characterized in that the plastic film ( 1 . 8th ) has a light-scattering property. Domestic appliance according to one of the preceding claims, characterized in that the plastic film ( 1 . 8th ) a touch foil ( 8th ), which sensor electrodes ( 7 ), which generate an electrical signal when touched. Domestic appliance according to one of the preceding claims, characterized in that on the first component ( 4 . 11 ) arranged at least two pins ( 5 . 6 . 12 . 13 ) have substantially the shape of a cylinder or a truncated cone. Domestic appliance according to one of the preceding claims, characterized in that the first component ( 4 . 11 ) is a light well of a display and the plastic film ( 1 . 8th ) is a polycarbonate film. Method for producing a domestic appliance with a control panel, comprising a fixing system ( 14 ), comprising (a) a first component ( 4 . 11 ) with at least two pins arranged on a component surface ( 5 . 6 . 12 . 13 ), wherein the respective cross-section of at least two pins ( 5 . 6 . 12 . 13 ) decreases with increasing distance from the component surface, starting from a maximum cross-section Q _max ; and (b) a plastic film ( 1 . 8th ) with at least two oblong holes ( 2 . 3 . 9 . 10 ), each slot ( 2 . 3 . 9 . 10 ) a central opening ( 2a . 3a . 9a . 10a ) and at least one laterally to the central opening ( 2a . 3a . 9a . 10a ) incision ( 2 B . 3b . 9b . 10b ) and the central opening ( 2a . 3a . 9a . 10a ) has a cross-section Q _L which is smaller than a median cross-section Q _{med of} one of the at least two pins ( 5 . 6 . 12 . 13 ) associated pin; the plastic film ( 1 . 8th ) on the first component ( 4 . 11 ) is attached by the plastic film ( 1 . 8th ) on the oblong holes ( 2 . 3 . 9 . 10 ) on the pins ( 5 . 6 . 12 . 13 ) is inserted; comprising the steps of: (i) providing a household appliance with the first component ( 4 . 11 ); and (ii) attaching the plastic film ( 1 . 8th ) on the oblong holes ( 2 . 3 . 9 . 10 ) on the pins ( 5 . 6 . 12 . 13 ). Fastening system ( 14 ), comprising (a) a first component ( 4 . 11 ) with at least two pins arranged on a component surface ( 5 . 6 . 12 . 13 ), wherein the respective cross-section of at least two pins ( 5 . 6 . 12 . 13 ) decreases with increasing distance from the component surface, starting from a maximum cross-section Q _max ; and (b) a plastic film ( 1 . 8th ) with at least two oblong holes ( 2 . 3 . 9 . 10 ), each slot ( 2 . 3 . 9 . 10 ) a central opening ( 2a . 3a . 9a . 10a ) and at least one laterally to the central opening ( 2a . 3a . 9a . 10a ) incision ( 2 B . 3b . 9b . 10b ) and the central opening ( 2a . 3a . 9a . 10a ) has a cross-section Q _L which is smaller than a median cross-section Q _{med of} one of the at least two pins ( 5 . 6 . 12 . 13 ) associated pin; the plastic film ( 1 . 8th ) on the first component ( 4 . 11 ) can be fixed by the Plastic film on the oblong holes ( 2 . 3 . 9 . 10 ) on the pins ( 5 . 6 . 12 . 13 ) is plugged. Fastening system ( 14 ) according to claim 11, characterized in that each slot ( 2 . 3 . 9 . 10 ) around the central opening ( 2a . 3a . 9a . 10a ) at least two symmetrical about the central opening ( 2a . 3a . 9a . 10a ) arranged incisions ( 2 B . 3b . 9b . 10b ) without recesses. Fastening system ( 14 ) according to claim 11 or 12, characterized in that the pins ( 5 . 6 . 12 . 13 ) have substantially the shape of a cylinder or a truncated cone. Fastening system ( 14 ) according to one of claims 11 to 13, characterized in that the pins ( 5 . 6 . 12 . 13 ) have a circular cross section, wherein the average diameter D _{M of} a pin is in the range of 1 to 3 mm.

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