DE102018200538A1 - Method for producing a control element for an operating device for a household appliance, wherein a base body is injected to a sensor element, and control element - Google Patents

Abstract

The invention relates to a method for producing an operating element (5) for an operating device (4) for a domestic appliance (1), in which at least one sensor element (7) of the operating element (5) is provided with a sensor frame (8) and at least one of the sensor frame (8) projecting contact element (9) for electrical contacting with a printed circuit board (L) of the operating device (4) is produced, and the operating element (5) with a base body (6) is produced, through which a support for the sensor element (7) is formed, characterized in that the Grundköper (6) is generated by the fact that material is injected onto the provided sensor element (7) and the shape of the base body (6) is formed during injection of the material.

Description

The invention relates to a method for producing an operating element for an operating device for a household appliance, wherein at least one sensor element of the operating element with a sensor frame and at least one projecting from the sensor frame contact element for electrical contacting with a circuit board of the operating device is produced, and the operating element with a Base body is produced, through which a support for the sensor element is formed. Furthermore, the invention relates to a control element.

There are already controls for controls for household appliances, which can be provided in particular for example a hob known. The operating element is formed in particular below a glass ceramic surface. The operating element is in particular touch-sensitive and can switch a corresponding function of the operating devices by approaching, for example, a finger of a user of the household appliance via a capacitive change within the sensor element of the operating element. For example, a cooktop, for example a heating of the cooktop, can be controlled by means of the operating element.

The DE 10 2009 021 033 A1 discloses an operating device and a method for producing an operating device. The operating device for an electrical appliance has an operating field, is arranged under the at least one sensor element as a control element of the operating device is designed for pressurized system on the underside of the control panel. The sensor element is designed like a frame and arranged on a component carrier. For attachment of the sensor element to the component carrier, the sensor element has at least one protruding, leg-like formed holding member which is force-urged into an electrically conductive lined hole in the component carrier, without further mechanical holding means or electrical connections to the holding member such as soldering or the like.

Furthermore, the describes WO 2008/022883 A1 an operating device for a domestic appliance having at least one capacitive sensor button, wherein the sensor button has an electrically conductive sensor element with a sensor surface, with which this sensor element rests against a rear side of an electrically insulating cover plate of the operating device, wherein a printed circuit board is arranged at a distance from the cover plate, and wherein the sensor element extends from the cover plate to the circuit board.

In the prior art, the sensor element and a main body of the operating element are provided as individual components. This requires additional assembly steps and, for example, additional holding devices in order to arrange the basic body of the operating element on the sensor element.

Object of the present invention is to provide a method and an operating element, by means of which a simplified manufacturing process of the operating element is made possible.

This object is achieved by a method and by an operating element according to the independent patent claims.

One aspect of the invention relates to a method for producing an operating element for an operating device for a domestic appliance, in which at least one sensor element of the operating element is produced with a sensor frame and at least one contact element protruding from the sensor frame for making electrical contact with a printed circuit board of the operating device. The operating element is produced with a basic body, by means of which a carrier for the sensor element is formed.

The base body is produced by injecting material onto the sensor element provided and by forming the shape of the base body during the injection molding of the material.

This makes it possible that an additional assembly step, namely the arrangement of the base body on the sensor element, is avoided, whereby in particular assembly time can be saved. Furthermore, it is thereby made possible that holding devices of the sensor element for the base body can be saved, since the base body is molded directly onto the sensor element. In particular, it is thereby made possible that the operating element can be arranged on the operating device in particular by the use of a highly automated standard process, whereby in particular the assembly time of the operating element to the operating device or the operating device can be generally reduced. Furthermore, a robust electrical contacting can be realized thereby. As a result, even in the installed state of the sensor element on a circuit board of the operating device, a stable electrical contact between the sensor element and the circuit board can be realized.

According to an advantageous embodiment of the main body is injected as a shaft-like body. In particular, a partial encapsulation of the sensor frame can thereby be enabled. As a result, an operating element with a recess can be created, wherein, for example, a luminous element of the printed circuit board can be formed within the recess, so that the luminous element can shine through the shaft of the main body. Furthermore, it is possible in that in particular the sensor frame is only partially encapsulated, so that an improved function of the sensor frame for example, a capacitive detection of a finger can be realized. Furthermore, this can realize an improved manufacturing process.

It has also proven to be advantageous if the base body is molded onto an underside of the sensor frame, so that an upper side of the sensor frame is exposed, in particular formed without spray material. This makes it possible that the sensor frame, which is designed in particular for the capacitive detection of a finger, in particular exposed and thereby improved capacitive detection is possible, whereby an improved operation of the operating device can be made possible by a user. Furthermore, this can realize an improved manufacturing process.

It has also proven to be advantageous if a wall thickness of the shaft-like base body is injected according to a frame width of the sensor frame. In particular, the frame width is a width of a frame part. In particular, the sensor frame is formed flat and the width of the frame part and thus the frame width is in particular greater than a thickness of the sensor frame. As a result, a support for the sensor frame is provided, which has the same dimensions as the sensor frame itself, particularly when seen in width. As a result, the sensor frame can be reliably supported by the shaft-like base body, whereby an improved operation of the operating device can be realized. Furthermore, this can realize an improved manufacturing process.

It is also advantageous if the base body is sprayed in such a way that the at least one contact element lies in a shaft interior of the shaft-like base body. As a result, the at least one contact element is protected against environmental influences. Furthermore, this can prevent the at least one contact element from electrically coming into contact with other contact elements of a further operating element, as a result of which a short circuit can be prevented. In particular, it is provided that the operating element has at least two contact elements, which are arranged in the shaft interior of the shaft-like base body. As a result, a robust operating element can be produced so that reliable operation of the operating device can be realized by a user.

According to a further advantageous embodiment, a wall height of the base body is formed smaller than a height of the contact element, so that a contact region of the contact element is exposed projecting downwardly protruding from the main body. In particular, the contact region for contacting with a printed circuit board of the operating device is formed. As a result, a simple electrical contacting of the operating element to the printed circuit board of the operating device can be made possible. Furthermore, it can also be used on different variants of the electrical contact, for example, the control elements for electrical contact in a hole in the circuit board "clipped" or as a press-fit based on the insulation displacement technique for electrical contacting in a hole with the circuit board be formed.

It has also proved to be advantageous if the base body is sprayed by means of an opaque material and / or by means of a material which is suitable for soldering by means of a surface mounting technology. In particular, by the embodiment that the main body is sprayed by means of an opaque material, thus, a light box can be provided. By means of the light box can be prevented that, for example, by a control element associated lighting element on the operating device further controls with this light element are inadvertently illuminated. Thus, the operating element can be illuminated in precise position with light and at the same time not affect the lighting of other controls. By the embodiment that the material is suitable for soldering by means of a surface mounting technology, a simple possibility can be created that the control element can be soldered to the main body to the circuit board. In particular, thus assembly time can be saved and the control can be reliably arranged on the circuit board. As a result, an improved production of the entire operating device is made possible. Furthermore, this can realize an improved manufacturing process.

In a further advantageous embodiment, a fixing part of a fixing device of the operating element is injection-molded onto the base body, in particular on a side wall of the shaft-like basic body. In particular, by the basic body with further, for example, basic bodies or other elements of the Operating device in contact and fixed. As a result, a more robust operating device can be created.

It is also advantageous if a separate cover of the operating element is provided for the main body. In particular, it can be provided that a fixing part is arranged on the base body and a further fixing part is arranged on the cover, which corresponds to the fixing part of the base body. In particular, the cover can then be placed on the base body and fixed via the fixing device. As a result, the main body can be protected, for example, from environmental influences. In particular, the cover is deep-drawn as a diffusion material and, for example, printable. In particular, then the cover carrier for a Tastenbedruckung that can be transilluminated. Thus, the vast majority of the cover is designed as a barrier pressure, in other words opaque.

It is also advantageous if the cover is produced from opaque material and is produced with a backlight-generated optical symbol as a translucent region and / or the translucent region of the cover is formed of a light-scattering material for homogeneous illumination of the optical symbol. In particular, the optical symbol can represent a function of the operating element. The symbol can be produced for example by means of laser engraving on the cover. Furthermore, the optical symbol can be printed on the cover. In particular, the symbol can optically describe a function of the operating element. In particular, the material of the cover has light-scattering properties, so that a homogeneous illumination without a hot spot for the optical symbol can be realized. This makes it possible for the optical symbol to be illuminated by a lighting element assigned to the operating element, for example on the circuit board of the operating device, and to be optically viewable for a viewer, in particular an operator, of the household appliance due to the light-transmitting area. This allows an improved and more intuitive operation of the household appliance. Alternatively, the cover may be formed with an opaque coating which is recessed in the region of the optical symbol.

It has also proved to be advantageous if a further separate sensor element is provided with a further sensor frame and at least one further contact element and the base body is produced by injecting material onto the provided sensor element and onto the further provided sensor element and the shape of the base body is formed during injection of the material. This makes it possible that the control element is equipped with two electrodes and, for example, a "mutual capacitance touchbrick" with a "drive + sense" electrode is provided. This makes it possible to detect a capacitance change between the two electrodes. In particular, an improved and better resolved capacitance change is detected by means of the "mutual capacitance" technology, whereby an improved operation of the operating device is made possible. Furthermore, it is possible that "functional safety" requirements can also be met by means of the two sensor elements. This functional safety is a precaution which, in particular, can check the operating element for the correct function. For example, a self-test can be carried out for this purpose and, during the self-test, a capacitance value can be detected between the two sensor elements. Should the detected capacitance value deviate from an expected capacitance value, it can be assumed, for example, that the operating element is impaired, as a result of which, for example, an error message can be generated or the operating element can transfer itself to a safe state. In particular, the sensor element and the separate sensor element may be formed as a winding wire solution.

According to a further advantageous embodiment, the sensor frame and the further sensor frame can be arranged in a plane and at a distance from each other. In particular, an advantageous arrangement can be created by means of which improved operation and in particular improved capacity evaluation of the sensor elements relative to one another can be created.

It is also advantageous if the base body is sprayed with a wall thickness which corresponds at least equal to the sum of a frame width of the sensor element, a further frame width of the second sensor element and a predetermined distance between the two sensor frames. As a result, an improved carrier for the sensor element and the further sensor element can be created and a reliable fit of the sensor elements can be realized on the carrier. Thus, a reliable capacitance detection between the sensor elements can be realized, whereby an improved operation of the operating device can be realized.

It has also proven to be advantageous if the main body is injected as a solid body. For example, the main body can be produced by means of a 2K injection molding process. For example, then an interior of the Main body are sprayed with a transparent material and an outer region of the body are injected with an opaque material to a light box, thereby enabling a light-emitting element, which is provided for example for the operating element on the circuit board, can shine through the translucent material of the base body and, for example, a symbol on a cover for the control element can illuminate. It is also possible that the base body is produced by means of a multi-component injection molding process. Thus, it is possible that the base body can be produced by means of at least two different materials and yet can be manufactured with reduced assembly via the corresponding multi-component injection molding process.

A further aspect of the invention relates to an operating element for an operating device for a domestic appliance, in which a basic element of the operating element is arranged on a sensor element of the operating element which has a sensor frame and at least one contact element protruding from the sensor frame for electrical contacting with a printed circuit board a carrier for the sensor element is formed by the base body. The main body is a molded body produced by injection molding on the provided sensor element.

Yet another aspect of the invention relates to an operating device with at least one operating element.

Furthermore, the invention also relates to a household appliance with at least one operating device. The household appliance is designed, for example, in particular as a hob or as a radiation trough, induction trough or as a fridge-freezer combination or as a cooking appliance.

Advantageous embodiments of the method are to be regarded as advantageous embodiments of the operating element, the operating device and the household appliance. The operating element, the operating device and the household appliance have physical features that enable the method or an advantageous embodiment thereof.

An independent further aspect of the invention relates to a method for producing an operating element for an operating device for a household appliance, in which at least one sensor element of the operating element is produced with a main body of the operating element, by which a carrier for the sensor element is formed, wherein the main body and the sensor element are integrally formed of metal and are punched from a metal sheet.

As a result, a robust electrical contact can be realized. As a result, even in the installed state of the sensor element on a circuit board of the operating device, a stable electrical contact between the sensor element and the circuit board can be realized.

It is also advantageous if the shape of the basic body is produced by bending the stamped metal. This allows simple and yet precise the shape of the body can be realized.

It is also advantageous if at least one contact element of the sensor element and / or a sensor frame of the sensor element is formed when punching the base body of the metal with the base body, and is brought by bending into the mold. As a result, an assembly step can be saved since the at least one contact element and / or the sensor frame is already brought into shape during the production of the shape of the main body. Furthermore, this assembly time can be saved.

According to an advantageous embodiment of the main body is bent as a shaft-like body. As a result, an operating element with a recess can be created, wherein, for example, a luminous element of the printed circuit board can be formed within the recess, so that the luminous element can shine through the shaft of the main body.

Advantageous embodiments of the first aspect of the invention are to be regarded as advantageous embodiments of the further aspect of the invention.

With information "top", "bottom", "front", "rear", "horizontal", "vertical", "depth direction", "width direction", "height direction" etc. are the intended use and proper arrangement of the component and given given at a particular before the component and view in the direction of the component given observer positions and orientations.

Further features of the invention will become apparent from the claims, the figures and the description of the figures. The features and feature combinations mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respectively specified combination but also in other combinations or in isolation, without the frame the To leave invention. Thus, embodiments of the invention are to be regarded as encompassed and disclosed, which are not explicitly shown and explained in the figures, however, emerge and can be produced by separated combinations of features from the embodiments explained. Embodiments and combinations of features are also to be regarded as disclosed, which thus do not have all the features of an originally formulated independent claim.

• 1 eine perspektivische Darstellung eines Haushaltsgeräts;
• 2 eine schematische Querschnittsansicht einer Ausführungsform einer Bedienvorrichtung;
• 3 eine schematische Perspektivansicht einer Ausführungsform eines Bedienelements der Bedienvorrichtung;
• 4 eine weitere schematische Perspektivansicht einer Ausführungsform eines weiteren Bedienelements;
• 5 eine schematische Seitenansicht einer Ausführungsform eines Kontaktelements einer Ausführungsform des Bedienelements;
• 6 eine perspektivische Ansicht einer Ausführungsform des Bedienelements mit einer weiteren Ausführungsform eines Kontaktelements;
• 7 eine schematische Draufsicht auf eine Ausführungsform des Bedienelements;
• 8 eine schematische Perspektivansicht der Ausführungsform des Bedienelements aus 7;
• 9 eine weitere schematische Draufsicht auf eine Ausführungsform eines Bedienelements; und
• 10 eine weitere schematische Perspektivansicht einer Ausführungsform eines weiteren Bedienelements.

Embodiments of the invention are explained in more detail below with reference to schematic drawings. Show it:

• 1 a perspective view of a household appliance;
• 2 a schematic cross-sectional view of an embodiment of an operating device;
• 3 a schematic perspective view of an embodiment of an operating element of the operating device;
• 4 a further schematic perspective view of an embodiment of another operating element;
• 5 a schematic side view of an embodiment of a contact element of an embodiment of the operating element;
• 6 a perspective view of an embodiment of the operating element with a further embodiment of a contact element;
• 7 a schematic plan view of an embodiment of the operating element;
• 8th a schematic perspective view of the embodiment of the operating element 7 ;
• 9 a further schematic plan view of an embodiment of a control element; and
• 10 a further schematic perspective view of an embodiment of another operating element.

In the figures, identical or functionally identical elements are provided with the same reference numerals.

1 shows a schematic perspective view of a household appliance 1 , The household appliance 1 is especially designed as a hob. The household appliance 1 has at least one cooking zone 2 , in the present embodiment, four cooking zones 2 on, which are heated. Furthermore, the household appliance 1 a hob plate 3 on, which are glass or glass ceramic, and which cooking zones 2 having.

The household appliance 1 also has an operating device 4 on, wherein by means of the operating device 4 the cooking zones 2 can be operated or controlled. In particular, a heating device of the household appliance 1 the operating device 4 being controlled.

2 shows a schematic sectional view of the household appliance 1 , in particular the operating device 4 , The operating device 4 has an operating element in the present embodiment 5 on which between the hob plate 3 and a circuit board L the operating device 4 is arranged. In particular, by means of the control element 5 the operating device 4 operable.

3 shows a schematic perspective view of an embodiment of the operating element 5 , The operating element 5 has a basic body 6 which in particular serves as a carrier for a sensor element 7 is trained. The sensor element 7 has a sensor frame 8th and at least one contact element 9 for electrical contact with the circuit board L on. In the present example, the sensor element 7 two contact elements 9 on.

It is envisaged that the basic body 6 is generated by that to the provided sensor element 7 Material is injected and the shape of the main body 6 is formed during injection of the material.

In the present embodiment, the main body 6 and the sensor element 7 in particular cuboid shaped. However, other geometric shapes, such as a cylindrical shape, are possible. In particular, it is provided that the basic body 6 is injected as a shaft-like body. This can be done in particular by partial encapsulation of the sensor frame 8th respectively. In particular, this is a shaft interior 10 educated. The main body 6 is especially at a bottom 11 of the sensor frame 8th molded so that a top 12 of the sensor frame 8th is exposed, in particular without spray material is formed. In particular, it is provided that a wall thickness of the shaft-like base body 6 according to a frame width 13 of the sensor frame is injected. The frame width 13 corresponds in particular to a width of a frame part 14 ,

In particular, it is provided that the basic body 6 is sprayed such that at least the one contact element 9 , in particular present, the two contact elements 9 in the interior of the shaft 10 of the shaft-like body 6 , lies. Furthermore, it is provided in particular that a wall height H of the basic body 6 is smaller than a height H' of the contact element 9 . so a contact area 15 of the contact element 9 down from the main body 6 standing out pending exposed.

In particular, the main body 6 by means of an opaque material and / or by means of a material which is suitable for soldering by means of a surface mounting technology.

The main body 6 is sprayed in particular such that on a side wall 16 of the shaft-like body 6 a fixer part 17 a fixing device of the operating element 5 is injected.

Furthermore, it can be provided that for the main body 6 a separate cover 18 of the operating element 5 provided. The cover 18 can be made in particular of opaque material and with a producible by backlight optical symbol 19 be made as a translucent area. In particular, the optical symbol 19 be produced by means of a laser engraving or by means of a printing. In particular, the material of the cover 18 light-scattering properties, allowing a homogeneous illumination without a hot spot for the optical symbol 19 can be realized. In the present embodiment, the cover is located 18 not on the control 4 , The cover 18 has here as an optical symbol 19 a circle with a dash, in particular this optical symbol 19 For example, for an Anbeziehungsweise off function of the control element 5für one of the cooking zones 2 can be viewed. Furthermore, the cover 18 another fixation part 20 having, which with the fixing part 17 corresponds, so in the assembled state, the cover 18 with the sensor element 7 and the body 6 can be fixed.

4 shows a further schematic view of the operating element 5 in a further embodiment. In the present embodiment, in particular, the cover 18 with the optical symbol 19 formed, which may be formed in particular as a seven-segment display. In other words, numbers from 0 to 9 can be displayed by the seven-segment display, for example, by backlighting. The cover 18 is formed in this embodiment such that the cover 18 into the shaft interior 10 dips and thus covers the shaft. The top 12 of the sensor element 7 remains in the assembled state thus exposed. Furthermore, it can be provided that on the cover 18 an orientation nose O is formed, and on the base body 6 , especially in the shaft interior 10 , also one to the orientation nose O corresponding further orientation nose O 'is formed, so that when inserting the cover 18 into the shaft interior 10 a misalignment of the cover 18 is prevented.

5 shows a schematic side view of an embodiment of a contact element 9 , The contact element 9 is designed as a contact pin. The circuit board L has in particular a hole 21 on, in which the contact element designed as a contact pin 9 is submersible. In particular, it is provided that the contact element 9 with the contact area 15 in the hole 21 dips and thereby electrically contacting the contact element 9 through the contact area 15 between the circuit board L and the contact element 9 can be produced.

6 shows a further perspective view of another embodiment of the operating element 5 , In the present embodiment, in particular by means of the insulation displacement technique, the control element 5 with the circuit board L be contacted. The contact element 9 is particularly designed so that it is in the hole 21 the circuit board L can be pressed in and due to a spring-like movement within the hole 21 can be held. By means of the contact element 9 Thus, a clamping effect within the hole 21 arise, so that the operating element 5 reliable and robust inside the printed circuit board L can be held and with the contact area 15 can be contacted electrically. In particular, this is the hole 21 the circuit board L with another contact area 22 the circuit board L designed so that the electrical contact can be carried out by means of the insulation displacement technique.

7 shows a schematic plan view of an embodiment of the operating element 5 , At the in 7 embodiment shown, the operating element 5 the sensor element 7 and another separate sensor element 23 on. The further sensor element 23 in particular has another sensor frame 24 and at least one further contact element 25 for contacting with the circuit board L on. The main body 6 is generated in particular by the fact that to the provided sensor element 7 and to the further provided sensor element 23 Material is injected and the shape of the main body 6 is formed during injection of the material. In particular, it is provided that the sensor frame 8th and the other sensor frame 24 be arranged in a plane and spaced from each other. Furthermore, the basic body 6 in particular a wall thickness W, which is at least equal to the sum of the frame width 13 and another frame width 26 the further sensor element 23 and a predetermined distance A between the two sensor frames 8th . 24 equivalent.

Alternatively, the sensor element 7 and / or the further sensor element 23 be formed by a winding wire. In particular, then the control element 5 at least two, in the present example 4 clamping elements S have, around and / or to which the sensor element 7 and / or the further sensor element 23 around the main body 6 can be stretched. This allows in a simple way, the sensor elements 7 . 23 to be provided. In particular, it can be provided that at least two of the clamping elements S as contact elements 9 . 25 for the sensor elements 7 . 23 are formed.

In particular, it can be provided that by means of the embodiment 7 a "mutual touch" feature can be provided. This makes it possible that through the sensor element 7 and the further sensor element 23 a capacitance change between the two sensor elements 7 . 23 can be detected when approaching a finger, whereby a more reliable determination of the operation can be done. Furthermore, it is thereby made possible that a "functional safety" function can be provided, so that by a self-test the operating element 5 can check if the functionality of the control 5 given is. If, for example, a detected capacitance value does not correspond to an expected capacitance value in the self-test, then it can be concluded that the operating element is impaired 5 is present. For this purpose, for example, a corresponding warning message can be issued.

8th shows a perspective view of the control 5 according to the 7 , The operating element 5 in this case has the sensor elements 7 and 23 on.

In the embodiment of the operating element 5 according to 7 or according to 8th It may also be possible that the two sensor elements 7 . 23 are reversed. In other words, for example, the sensor element 7 opposite the main body 6 inside and the other sensor element 23 opposite the main body 6 be located outside.

9 shows a further embodiment of the operating element 5 , In the present embodiment, in particular in the through the shaft-like body 6 formed shaft interior 10 a lighting element 27 educated. The light element 27 is in particular with the circuit board 11 coupled. In particular, this may, for example, the cover 18 be illuminated. Furthermore, the following embodiment according to 9 in particular at the corners of a respective thickening 28 on, so the stability of the control 5 can be improved. In particular, in the following embodiment, the frame width 13 for example, be 1 millimeter. The reinforcement 28 may then be formed in particular in a range of, for example, 2 millimeters by 2 millimeters around the corner. In particular, then the shaft interior 10 For example, have a size of 8 millimeters by 8 millimeters. A width B of the operating element 5 is then formed with 10 millimeters. In the 9 is the operating element 5 in particular rectangular, in particular square, formed, so that an edge length of the body 6 the width B equivalent. In particular, the lighting element 27 formed as an LED and may for example have a size of 0402.

10 shows a further schematic perspective view of an embodiment of the operating element 5 , The cover 18 is formed plate-like in the present embodiment. The cover 18 can into the shaft interior 10 be inserted and for example by means of a nose N at the base body 6 , which may also be injected, are kept. The cover 18 can be designed as a thin injection molded part. It is also possible that the cover 18 an orientation nose O having, which with another orientation nose O' corresponds, so that a misalignment of the cover in the shaft interior 10 is avoided.

LIST OF REFERENCE NUMBERS

1

household appliance

2

cooking zone

3

Hotplate

4

operating device

5

operating element

6

body

7

sensor element

8th

sensor frame

9

contact element

10

Schacht Affairs

11

bottom

12

top

13

frame width

14

frame part

15

contact area

16

Side wall

17

fixing

18

cover

19

optical symbol

20

another fixing part

21

hole

22

further contact area

23

another sensor element

24

additional sensor frame

25

another contact element

26

further frame width

27

light element

28

reinforcement

L

circuit board

H

Height of base body

H'

Height of the contact element

A

distance

B

width

N

nose

O

Orientation nose

O'

further orientation nose

S

clamping element

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

• DE 102009021033 A1 [0003]
• WO 2008/022883 A1 [0004]

Claims (15)

Method for producing an operating element (5) for an operating device (4) for a domestic appliance (1), in which at least one sensor element (7) of the operating element (5) projects with a sensor frame (8) and at least one of the sensor frame (8) Contact element (9) for electrical contacting with a printed circuit board (L) of the operating device (4) is produced, and the operating element (5) with a base body (6) is produced, through which a support for the sensor element (7) is formed, characterized in that the base body (6) is produced in that material is injected onto the provided sensor element (7) and the shape of the base body (6) is formed when the material is sprayed on. Method according to Claim 1 , characterized in that the base body (6) as a shaft-like base body (6) is injected. Method according to one of the preceding claims, characterized in that the base body (6) is injection-molded onto a lower side (11) of the sensor frame (8) so that an upper side (12) of the sensor frame (8) is exposed, in particular without spray material , Method according to one of the preceding claims, characterized in that a wall thickness of the base body (6) corresponding to a frame width (13) of the sensor frame (8) is injected. Method according to one of Claims 2 to 4 , characterized in that the base body (6) is injection-molded in such a way that the at least one contact element (9) lies in a shaft interior (10) of the shaft-like base body (6). Method according to one of the preceding claims, characterized in that a wall height (H) of the base body (6) is formed smaller than a height (H ') of the contact element (9), so that a contact region (15) of the contact element (9). downwards from the main body (6) protruding standing freely exposed. Method according to one of the preceding claims, characterized in that the base body (6) by means of an opaque material and / or by means of a material which is suitable for soldering by means of a surface mounting technology, is injected. Method according to one of the preceding claims, characterized in that on the base body (6), in particular on a side wall (16) of the shaft-like base body (6), a fixing part (17) of a fixing device of the operating element (5) is molded. Method according to one of the preceding claims, characterized in that a separate cover (18) of the operating element (5) is provided for the base body (6). Method according to Claim 9 characterized in that the cover (18) is made of opaque material and is formed with a backlighted optical symbol (19) as a transmissive region and / or the translucent region of the cover (18) is made of a light diffusing material for uniform illumination of the light source optical symbol (19) is formed. Method according to one of the preceding claims, characterized in that a further separate sensor element (23) with a further sensor frame (24) and at least one further contact element (25) is provided, and the base body (6) is generated by the fact that provided to the Sensor element (7) and to the further provided sensor element (23) material is molded and the shape of the base body (6) is formed during injection of the material. Method according to Claim 11 , characterized in that the sensor frame (8) and the further sensor frame (24) are arranged in a plane and spaced from each other. Method according to Claim 11 or 12 , characterized in that the base body (6) with a wall thickness (W) is injected, which at least equal to the sum of a frame width (13) of the sensor element (7), a further frame width (26) of the further sensor element (23) and a predetermined Distance (A) between the two sensor frames (8, 24) corresponds. Method according to one of the preceding claims, characterized in that the base body (6) is injected as a solid body. Operating element (5) for an operating device (4) for a household appliance (1), in which a contact element (9. 9) protrudes on a sensor element (7) of the operating element (5), which has a sensor frame (8) and at least one contact element (9) protruding from the sensor frame (8) ) for electrical contacting with a printed circuit board (L), a base body (6) of the operating element (5) is arranged, wherein by the base body (6) a support for the sensor element (7) is formed, characterized in that Base body (6) is a molded body produced by injection molding on the provided sensor element (7).

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