EP2659195B1 - Kitchen hob - Google Patents

Description

The present invention relates to a hob according to the preamble of claim 1.

Domestic appliances, such as a hob or oven, may have an operating status indicator and be operated by touch-sensitive touch panel elements. In the case of glass-ceramic cooktops, for example, an air gap may occur due to manufacturing tolerances between the glass ceramic and the display / touch panel electronics. Especially with cooktop covers, which have on the bottom of a profiled surface with knobs, this has the consequence that are illuminated by the dimpled profile of such a glass ceramic bottom LEDs of the power indicator not sharp and additionally IR sensors of touch panel elements only insufficiently. Often, in such a case, a silicone layer is attached to the underside of the hob cover to press the display elements against this silicone layer and to avoid such blurry appearing display. However, such an approach requires an additional element in the production of the hob and is thus costly. The sensor function of the touch panel elements is additionally hindered by such a silicone layer.

The EP 2024685 A1 discloses a household appliance, in particular a household oven having at least one control and / or display board, which is arranged in a receiving area provided for this purpose, wherein the control and / or display board in the assembled state another component, in particular a bottom of a glass ceramic hob or a Panel faces. In this case, the control and / or display board is positioned in a receptacle arranged in the receptacle. The receptacle has a certain number of spring elements which act on a rear side of the control and / or display board.

The FR 2 895 047 A1 shows a leaf spring in particular for an electric appliance of the type of hob.

The DE 91 12 371 U1 describes at touch switches of electrical appliances, an attachment of two boards together, with spaced from a base plate fixed in a holder having, for example, a relay, a sensor board is arranged, which is pressed by means of springs against the underside of a glass ceramic.

The DE 10 2008 043 457 A1 discloses a board carrier assembly for holding a printed circuit board with touch sensors.

The EP 0 687 131 A2 shows a control arrangement for an electric heater.

The DE 10 2007 055 310 A1 describes a hob with an arranged under the cooking surface electronic circuit board.

It is the object of the present invention to provide an improved cooktop.

This object is achieved by a hob according to claim 1. Advantageous embodiments emerge from the respective subclaims and the following description.

The present invention provides a cooktop with an electronic board having a display and / or operating element and is attached to at least one holding element in a circuit board housing. Furthermore, the holding element is approximately L-shaped and designed as a spring element,
to press a surface of the display and / or control element to an inner surface of a cooktop cover.

Furthermore, the board housing and the at least one retaining element is formed as a one-piece component.

The present invention is based on the finding that it is possible by a newly developed holding element for an electronic board to secure the electronic board both against falling out of the board housing as well as display and / or operating elements of the electronic board to press directly to the inner surface of the hob cover , In the circuit board housing spring element and fixing element are realized in a combined holding element. In this way, a saving of to be manufactured elements of the board housing can be achieved, which can reduce the manufacturing cost of such a circuit board housing. In the installed state in the hob, the electronic circuit board is pressed by the spring function of the holding elements so against the hob cover that a readability and / or operability of the display and / or operating element is secured to the electronic board.

The board housing and the at least one retaining element are further formed as a one-piece component. In particular, the board housing and the at least one retaining element may consist of a same material and be manufactured in one operation. This offers the advantage that the manufacturing cost of the circuit board housing with the retaining element is also reduced due to the one-piece production.

It is advantageous if the at least one holding element further comprises a fixing surface and a support surface, which are in particular facing each other and spaced from each other, and the electronic circuit board is mounted between the fixing surface and the support surface. Such an embodiment of the present invention offers the advantage of a stable mounting of the electronic board, so that when installing the electronic board falling out of the same can be avoided.
According to a further embodiment of the present invention, the fixing surface and the bearing surface can at least relative to a support of the holding element be aligned partially inclined, in particular be aligned parallel to each other in relation to the carrier inclined aligned areas of the fixing surface and the support surface. Such an embodiment of the present invention provides the Advantage that when clamping the circuit board housing or the holding element to the inner surface of the hob cover larger areas of the bearing surface and the fixing surface can be pressed onto the electronic board and thus a punctual loading of the electronic board by pressing one or more edges of the holding element on the surfaces of Electronics board can be avoided. Further, according to another embodiment of the present invention, each of the fixing surface and the support surface may have a first portion inclined to a second portion. The respective areas of the fixation surface and the support surface can be achieved for example by an angled design of the fixation surface and the support surface. Such an embodiment of the present invention has the advantage that the electronic circuit board is held in a safe and tension-free by the holding element in a position before installation in the hob and after installation in the hob.

According to a particular embodiment, the at least one holding element may have a spring arm, on which the at least one holding element is connected to the sinker housing. Such an embodiment of the present invention has the advantage that the fixed to the support member and resiliently mounted electronic board can be pressed with a predetermined by the design of the spring arm force against the cooktop cover, on the one hand the operability and readability of at least one display and / or Operating element is improved or optimized and on the other hand no damage to the holding element or the hob cover is to be feared.
The circuit board housing may also have at least one stop element for limiting a movement possibility of the electronic circuit board. Such an embodiment The present invention offers the advantage that the stop element limits a direction of movement beyond a certain deflection of the holding element, so that a break of the holding elements can be avoided in case of accidental excessive pressure when placing the hob cover on the board housing.

In addition, the board housing may further comprise at least one resilient support member for the electronic board, which is designed to exert pressure on the electronic board and thereby to press the surface of the at least one display and / or operating element to the inner surface of the hob cover. Such an embodiment of the present invention has the advantage that in a simple manner an increased and / or over a larger area more uniform pressure force of the electronic board against the hob cover can be realized if the pressure exerted by the holding elements pressing force should not be sufficient.

Also, the board housing may further comprise at least one centering projection for aligning the electronic board in the board housing. Such an embodiment of the present invention has the advantage that a positionally accurate insertion of the electronic board is facilitated in the board housing.

According to a particular embodiment, the board housing may be cup-shaped, and projecting a housing edge of the cup-shaped board housing in the direction of the cooking field cover. Such an embodiment of the present invention offers the advantage that the shell shape of the board housing enables improved protection of the electronic board. Since the edge of the housing according to a particular embodiment of the invention rests on the hob cover or is pressed against this, the electronics board and / or the holding elements in case of accidental, too strong pressing the hob cover to the board housing can not be damaged, since the edge of the housing acts as a stop.

In this case, the housing edge may have a sealing element which is arranged between the edge of the housing and the hob cover. Such an embodiment of the present invention has the advantage that in the installed state in the hob, the board housing with the electronic board therein can be protected from the ingress of moisture and other vapors.

The printed circuit board housing may also have a plurality of holding elements along a first side edge, and a plurality of holding elements along a second side edge opposite the first side edge. Such an embodiment of the present invention offers the advantage that the electronic board can be kept particularly secure by two groups of holding elements, which are arranged along the two (long) side edges of the electronic board on the board housing. A contact pressure on the electronic board can be distributed as evenly as possible over the electronics board by a uniform distribution holding elements. Here, the holding elements along the first side edge with respect to the number and the exact geometry of holding elements may differ, which are arranged along the second side edge.

Fig. 1A

eine perspektivische Darstellung eines Haushaltsgeräts, das ein Ausführungsbeispiel der vorliegenden Erfindung aufweist;

Fig. 1B

eine perspektivische Ansicht eines Teilbereiches eines Haushaltsgerätes, bei dem die Kochfeldabdeckung angehoben dargestellt ist;

Fig. 2A und 2B

perspektivische Darstellungen eines Platinengehäuses zur Verwendung in einem Ausführungsbeispiel der vorliegenden Erfindung;

Fig. 3A bis 3E

schematische Darstellungen des Halteelements aus Fig. 2A und 2B in unterschiedlichen Perspektiven; und

Fig. 4

eine schematische Darstellung eines Vergleiches von zwei Auslenkungszuständen des Halteelements aus Fig. 2A bis 3E.

The invention will be explained in more detail with reference to the accompanying drawings of an embodiment. Show it:

Fig. 1A

a perspective view of a household appliance, which has an embodiment of the present invention;

Fig. 1B

a perspective view of a portion of a household appliance, in which the hob cover is shown raised;

FIGS. 2A and 2B

perspective views of a board housing for use in an embodiment of the present invention;

FIGS. 3A to 3E

schematic representations of the retaining element Fig. 2A and 2 B in different perspectives; and

Fig. 4

a schematic representation of a comparison of two Auslenkungszuständen of the holding element Fig. 2A to 3E ,

The same or similar elements may be given the same or similar reference numerals in the following figures, with a repeated description of these elements being omitted.

Fig. 1A shows a perspective view of an exemplary household appliance 100. The household appliance 100 has a hob 110 and an oven 120. The hob 110 includes four cooking zones 115, of the four cooking zones for clarity only one is provided with a reference numeral. The cooking zones are arranged on a hob cover 117 and controllable by means of controls described in more detail below, which are arranged in a hob control area 118 on or below the hob cover 117. These controls are, for example, touch panel elements that include a sensor that registers a touch of the control element on the top of the cooktop cover 117 and generates a control signal for a heating element for one of the cooking zones 115. The oven 120 has a oven door 125, a door handle or handle 130, a viewing window 135, a blow-out gap or ventilation gap 140 and a front panel 145. The oven door 125 closes a cooking space inside the oven 120 and may be formed as a hinged door or a pull-out door. The viewing window 135 forms part of the oven door 125 and may be composed of one or more panes of glass. The handle 130 is disposed in an upper portion of the oven door 125 and extends parallel to an upper door panel. The ventilation gap 140 is located between the upper door panel and the front panel 145. The front panel 145 has an oven panel 150 that includes controls 155. The controls 155 are operable by a user of the home appliance to control functions of the oven 120.

Under the in Fig. 1A shown operating area 118 of the hob cover 117 is shown in the schematic representation Fig. 1B arranged a board housing 200, in which an electronic circuit board described in more detail below with the display and / or controls is arranged. In the Fig. 1B is a perspective view of a portion of the household appliance 100 with raised hob cover 117 and schematically illustrated board housing 200 can be seen. When placing the reasonably transparent cooktop cover 117 on the household appliance 100 thus the board housing 200 is pressed with an electronic board held therein to an inner surface 160 of the cooktop cover 117 and thereby a direct concern of a control and / or display element on the cooktop cover 117 better readability of the display elements and / or a better function of the controls ensured.

The FIGS. 2A and 2 B 12 show perspective views of a board housing 200 for use in an embodiment of the present invention. Shown are the board housing 200 with a base plate 205, holding elements 210, stop elements 220, resilient support members 230, a housing edge 240, and a centering projection 250. Further, for ease of description, a Cartesian coordinate system having three axes x, y, and z in the lower left portion of FIG Fig. 2A or in the upper left area of Fig. 2B located.

In the perspective view of Fig. 2A the board housing 200 is shown as an elongated body, with a straight long side edge in the foreground. This long side edge runs along the y-axis of the coordinate system. An opposite long side edge is not continuous straight in the y direction, but has a bulge in the middle section of its course. Both narrow side edges run in a straight line in the x direction. These side edges (ie, the long side edges and the narrow side edges) define the course of the housing edge 240. The housing edge 240 encloses an xy plane base plate 205 of the board housing 200 on which the elements 210, 220, 230, and 250 are disposed. The board housing 200 has an overall height in the z-direction. The housing edge 240 protrudes by an amount from the ground plane of the board housing 200 that is less than the overall height. The space extending from the ground plane to the upper case edge 240 is provided for receiving an electronic board. The board housing 200 is, for example, a shaped body, which is produced in one piece from a suitable material, for example from a plastic material, by a suitable method, for example by an injection molding method.

The holding elements 210 are arranged on the base plate 205 of the board housing 200 so that they are placed in the region of a peripheral edge of a male electronic board. In Fig. 2A is arranged along the rear long side edge 260 at a certain distance from the same and from each other a first group of four holding elements 210. Along the front, rectilinear, long side edge 270 of the board housing 200, a second group of two retaining elements 210 is also arranged at a certain distance from the same and from each other. Each retaining element 210 is approximately L-shaped. A longer portion of the holding members 210 extends as shown in FIG Fig. 2A in the y direction. The longer section is a spring arm of the holding element 210 connected on one side to the base plate 205 of the board housing 200, which will be described in more detail below. The spring arm runs in a corresponding cutout in the Base plate 205 of the board housing 200, so that a deflection of the spring arm is possible. At the not connected to the base plate 205 of the board housing 200 end of the spring arm is followed by a shorter portion of the holding member 210 at. The shorter portion of the holding member 210 extends in the z-direction up to a certain height above the base plate 205. From the extending in the z-direction portion of the holding member 210 extend - from the base plate 205 in this order - a support surface and a Fixing surface, between which mounted in the hob state of the circuit board housing 200, an electronic circuit board is arranged. The shorter portion of the spring arm can therefore also be referred to as a support for the support surface and the fixing surface.

Of the four retaining elements 210 in the region of the rear long side edge 260 of the board housing 200, the spring arms of the left two retaining elements 210 are connected at their right ends to the base plate 205. The same applies to the left of the two holding elements 210 in the region of the front long side edge 270. The spring arms of the right two holding elements 210 in the region of the rear long side edge 260 and the spring arm of the right holding element 210 in the region of the front long side edge 270 are at their left Ends connected to the base plate 205. The shape of the holding elements of the second group of holding elements 210 differs from the shape of the holding elements of the first group of holding elements 210. Thus, in the second group of two holding elements 210, the bearing surfaces in the x direction with respect to the bearing surfaces of the remaining four holding elements 210th increased. In practice, this does not necessarily apply and all holding elements can have the same shape. On the exact shape and design of the holding elements 210 is in the FIGS. 3A to 3E discussed in more detail.

There are also shown four stop elements 220. The stop elements 220 are spatially assigned to the first group of the four holding elements 210 in the base plate 205 of the board housing 200. Each of the stopper members 220 is disposed adjacent each one of the holding members 210, more specifically, adjacent to the z-direction extending portion thereof. The stop elements 220 are formed as narrow, web-shaped projections which extend from the base plate 205 in the z-direction upwards. A height of the stop elements 220 above the base plate 205 is less than the height of the holding elements 210 above the base plate 205, but is sized so that the stop members 220 serve as stops in the x direction for an attached to the support members 210 electronic board in the mounted state on the hob.

The resilient support elements 230 are arranged in the region of the front long side edge 270 of the board housing 200. The two holding elements 210 of the second group of holding elements are placed between the resilient supporting elements 230. The resilient support elements 230 are contact areas which are prestressed in the z direction and extend obliquely in the x direction, and are inclined upwards and are connected on one side to the base surface of the board housing 200 for an electronic circuit board. Also, the resilient support members 230 are provided in corresponding cutouts of the base of the circuit board housing 200, so that a resilient deflection is possible.

The upper casing edge 240 comes in the installed state of the board housing 200 in a household appliance in contact with the inner surface 160 of the hob cover 117. The housing edge 240 is provided with a sealing member 280 which, after the installation between the inner surface 160 of the hob cover 117 and the housing edge 240 arranged is. The sealing element 280 may be, for example, a sealing lip made of silicone, rubber or the like.

The centering projection 250 is arranged in the area of the front long side edge at the base or ground plane of the board housing 200. The centering projection 250 extends in a web shape in the z and x directions and is dimensioned and arranged to cooperate with a recess of the electronic board to achieve a centering or alignment of the electronic board in the board housing 200.

Fig. 2B shows the board housing 200 from Fig. 2A rotated by approximately 180 degrees about the z-axis. Thus, the formerly long front side edge 270 is off Fig. 2A now the rear long side edge 260 in Fig. 2B , At the base of the circuit board housing 200 are in Fig. 2B in the region of the rear long side edge 260 of the centering projection 250, the resilient support members 230 and the two holding elements 210 arranged.

The FIGS. 3A to 3E show schematic representations of a holding element 210 from the FIGS. 2A and 2 B , Shown are of the holding member 210 in the FIGS. 3A to 3D in each case a spring arm 312 and a carrier 313 on which a fixing surface 314 and a bearing surface 316 are formed. In Fig. 3E only the carrier 313 with the fixing surface 314 and the bearing surface 316 are shown by the holding element 210.

Fig. 3A FIG. 12 shows the retaining element 210 obliquely from the front approximately in alignment, as one of the four rear retaining elements 210 in FIG Fig. 2A is oriented. For better illustration is for Fig. 3A On the top right is a Cartesian coordinate system with three axes x, y and z. Bottom right in the illustration of Fig. 3A represents a black filled area a junction of the spring arm 312 of the holding member 210 on a board housing. From this junction of the spring arm 312 extends in Fig. 3A in the y direction diagonally to the top left. The spring arm 312 has a rectangular profile in cross-section. At the not connected to a circuit board housing end of the spring arm 312, the holding member 210 has a in the z-direction upwardly extending portion, the carrier 313 on. At each one projection of this support 313, the fixing surface 314 and the support surface 316 are arranged. In this case, the fixing surface 314 is closer to the upper end of the holding member 210 than the support surface 316. The fixing surface 314 and the support surface 316 are facing each other or aligned at least parallel or anti-parallel. The fixing surface 314 and the bearing surface 316 are at least partially aligned relative to the carrier 313. The surfaces 314 and 316 each have a smaller first area which extends parallel to the xy plane. Further, the surfaces 314 and 316 each have a larger second area which is inclined downwardly toward the spring arm 312 in the y-direction. In this case, the surfaces 314 and 316 extend in a profile in the y-direction parallel to each other. The function of the partially tapered surfaces 314 and 316 will be described in more detail below Fig. 4 seen.

Fig. 3B FIG. 12 shows the retaining element 210 obliquely from the front approximately in alignment, as one of the two rear retaining elements 210 in FIG Fig. 2B is oriented. Fig. 3C shows the holding element 210 frontally from the front in the x direction. Fig. 3D shows the holding element 210 from below in the z-direction. Fig. 3E shows the holding member 210 from the spring arm 312 opposite side in the y direction.

Hereinafter, a fixing process for mounting an electronic board in the board housing 200 from the FIGS. 2A and 2 B briefly outlined. An electronic board is first placed on the resilient support members 230 and the two support members 210 between the resilient support members 230 during assembly, aligned with the centering projection 250, and then latched to the four support members 210 on the opposite side. The holding elements 210 thereby form combined Rastund spring elements. The two holding elements 210 between the resilient support elements 230 and the four holding elements 210 on the opposite side engage around the electronic circuit board to secure them in the z-direction. The position in the x direction is defined by the stop elements 220. The spring arm 312 of each retaining element 210 in this case generates the desired spring force during a deflection in the z-direction. In this deflection, the entire holding member 210 moves in the z direction down. This has the advantage that an upper fixing surface 314 never protrudes beyond elements of the electronic board and thus large spring travel can be realized. During compression, the holding elements 210 rotate. For this reason, the holding elements 210 are provided in the region of the support surface 316 and the fixing surface 314 with bevels so as not to overload the electronic board by a pressure of edges of the holding element. Also, for example, in the housing, as it is designed, two different types of boards are installed. A first of the types of boards may be elongate, which engages only on the two outer opposite holding elements. A second of the types of boards can have a smaller board, which engages only on the two inner opposite holding elements. This is for example not on the support elements. The front retaining elements are conveniently used always.

Fig. 4 shows schematic cross-sectional views of a first deflection state 400 of a holding member 210 of the FIGS. 2A to 3E before placing or pressing the hob cover 117 on the board housing with the holding element 210 (left illustration Fig. 4 ) and a second deflection state 410 after placing the hob cover 117 on the board housing (right illustration Fig. 4 ). In both the first deflection state 400 and the second deflection state 410, an electronic circuit board 420 is respectively mounted between the bearing surface 316 and the fixing surface 314 of the retaining element 210. The electronics board 420 further comprises at least one display and / or operating element 425, which may be a display element, by means of which a status display, for example, about a current power supply to a heating element of a cooking zone or a temperature of a cooking zone is output, which then recognize a user through the transparent cooktop cover can. Also, the display and / or operating element 425 may comprise a sensor which is designed to detect a touch of a region of the cooktop cover by means of the sensor according to the touch panel touch detection and from this a control signal for the control of the power supply to a heating element for one of To generate cooking zones of the hob. Further, between dashed lines extending horizontally and in parallel across the left and the right half of FIG Fig. 4 A spring travel 430 indicated by an arrow around which the electronics board 420 together with the display and / or operating element 425 is pressed down when the inner surface 160 of the cooktop cover is brought from the left illustrated state when placing the cooktop cover in a rebounded position is the one in the right representation Fig. 4 is apparent.

In the first deflection state 400, the unassembled state or the mounting position, the electronic board 420 is hooked to the support member 210 and the support member 210 is not deflected by a deflection of the spring arm. The smaller, edge-like first regions 435 of the fixing surface 314 and the bearing surface 316 abut against opposite or opposite main surfaces of the electronic circuit board 420. In this case, there is still a certain clearance between an edge formed by these first regions 435 and the electronic circuit board 420, so that the electronic circuit board 420 directly adjoins the first region 435 of the support surface 316, but a small gap exists between the first region 435 of the fixing surface 314 and the electronic board 420 is present.

In the second deflection state 410, the compressed state or the use position, the holding element 210 with the electronics board 420 suspended therein is deflected counter to by the bending of the holding element 210 or the spring arm 312 of the holding element 210. In this state, the larger, second portions 440 of the fixing surface 314 and the bearing surface 316 are in contact with the main surfaces of the electronic board 420 remote from each other. The holding element 210 has been moved downwardly by the deflection about the spring travel 430 bending of the spring arm 312 results so that the second portions 440 of the surfaces 314 and 316 press against the electronics board 420. In this way, on the one hand, it can be ensured that the display and / or operating element 425 is always pressed against the inner surface 160 of the hob cover 117 when the hob cover is placed on the sinker housing and, furthermore, can be ensured by such an embodiment of the holding element 210 that the electronics board 420 is not damaged when placing the hob cover 117 by a high pressure of the edges 435 on the main surfaces of the electronic board 420. At the same time, by a predetermined dimension of the length of the spring arm 312 in conjunction with a use of a particular material for the spring arm 312, it can be ensured that the display and / or operating element 425 is pressed against the inner surface 160 of the cooktop cover 117 with a predetermined force that a break of the cooktop cover 117 by a too high force, with the display and / or operating element 425 could be pressed against the cooktop cover 117, otherwise avoided. Although it is in Fig. 4 is merely indicated schematically, it can be seen that the upper end of the holding member 210 does not extend upward beyond the display and / or control element 425 on the electronic circuit board 420 addition. For this purpose, a maximum length of the carrier 313 from the first region 435 of the fixing surface 314 to one end of the carrier 313 may be less than a height of the display and / or operating element 425. It can also be seen that the oblique second regions 440 the fixing surface 314 and the bearing surface 316, a horizontal orientation of the board 420 with respect to the inner surface 160 of the hob cover 117 can be kept constant regardless of the deflection state of the holding member 210.

reference numeral

100

household appliance

110

hob

115

cooking zone

117

Hob cover

118

Hob operating area

120

oven

125

oven door

130

Handle

135

window

140

ventilation gap

145

front panel

150

oven control panel

155

operating element

160

Inner surface of the hob cover

200

platinum case

205

baseplate

210

retaining element

220

stop element

230

resilient support element

240

housing edge

250

centering

260

first side edge of the board housing

270

second side edge of the board housing

280

sealing element

312

spring arm

313

carrier

314

fixation surface

316

bearing surface

400

first deflection state

410

second deflection state

420

electronic board

425

Display and / or operating element

430

travel

435

first areas of the support surface and the fixation surface

440

second areas of the support surface and the fixation surface

Claims (10)

1. Hob (110) with an electronic circuit board (420) which has a display and/or operating element (425) and is fastened to at least one retaining element (210) in a circuit board housing (200), wherein the retaining element (210) is embodied as a spring element for pressing a surface of the display and/or operating element (425) onto an inner surface (160) of a hob cover (117), characterised in that the retaining element (210) is embodied in an approximately L-shaped manner and the circuit board housing (200) and the at least one retaining element (210) are embodied as an integrated component.
2. Hob (110) according to claim 1, characterised in that the at least one retaining element (210) additionally has a fixing surface (314) and a supporting surface (316), which are in particular arranged such that they are facing towards one another and are spaced at a distance from one another, and the electronic circuit board (420) is mounted between the fixing surface (314) and the supporting surface (316).
3. Hob (110) according to claim 2, characterised in that the fixing surface (314) and the supporting surface (316) are aligned at least partially at an angle with respect to a mount (313) of the retaining element (210), in particular the regions (440) of the fixing surface (314) and supporting surface (316) aligned at an angle in relation to the mount (313) are aligned in parallel to one another.
4. Hob (110) according to one of the preceding claims, characterised in that the at least one retaining element (210) has a spring arm (312), on which the at least one retaining element (210) is connected to the circuit board housing (200)
5. Hob (110) according to one of the preceding claims, characterised in that the circuit board housing (200) also has at least one stop element (220) for delimiting a possibility for movement of the electronic circuit board (420).
6. Hob (110) according to one of the preceding claims, characterised in that the circuit board housing (200) also has at least one sprung support element (230) for the electronic circuit board (420), which is embodied to exert pressure onto the electronic circuit board (420) and as a result to press the surface of the at least one display and/or operating element (425) onto the inner surface of the hob cover (117).
7. Hob (110) according to one of the preceding claims, characterised in that the circuit board housing (200) also has at least one centring projection (250) for aligning the electronic circuit board (420) in the circuit board housing (200).
8. Hob (110) according to one of the preceding claims, characterised in that the circuit board housing (200) is embodied in the shape of a shell, and a housing edge (240) of the shell-shaped circuit board housing (200) protrudes in the direction of the hob cover (117).
9. Hob (110) according to claim 8, characterised in that the housing edge (240) has a sealing element (280) which is arranged at least partially between the housing edge (240) and the hob cover (117).
10. Hob (110) according to one of the preceding claims, characterised in that the circuit board housing (200) has a plurality of retaining elements (210) along a first side edge (260), and a plurality of retaining elements (210) along a second side edge (270) opposing the first side edge.

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