EP2790468B1 - Cooking hob and method for fitting a cooking hob - Google Patents

Description

Field of application and state of the art

The invention relates to a hob and a method for mounting a hob.

From the DE 202007001432 U1 a possibility for fixing a housing for functional units of a hob is known, in particular heaters and power electronics and control electronics. In this case, a sheet metal is fastened with hook-like locking tabs on the underside of a hob plate, on the underside, in turn, a housing for the electronics is fastened by means of the locking tabs.

Another way to install a hob is from the DE 202009012872 U1 known. Here, a housing for electronics at the bottom of a metal plate with locking projections and a protruding locking tab is first moved and then screwed. For this purpose, however, again a large-area metal plate on the underside of the hob plate is required for the locking projections and locking tabs. Depending on the design of functional units of the hob, especially the displacement can be very disadvantageous.

From the EP 2503248 A1 is a hob known with a cooktop plate and a tub in which a heating unit and other components of the hob are added. The tub is mounted with an outwardly bent and downwardly facing outer edge on two opposite sides in symmetrical identical mounting rails and rests on an approximately horizontally extending leg of the mounting rails. Alternatively, an outer edge of the tub can also be bent inwards and hung on legs of mounting rails, which then point outwards. In any case, the attachment is identical on both sides, as are the mounting rails also. The attachment is made by pushing or sliding the tub on or over the mounting rails together with automatic locking.

From the EP 1139695 A2 It is known to attach a printed circuit board control of a hob on two opposite mounting rails. The two mounting rails in this case have inwardly facing legs on which rests the circuit board. One of the two legs or one of the two fastening rails is down to the other tapers so that a run-in inclination is provided including rest opportunity for the circuit board. After snapping the circuit board a positive fastening is given.

From the EP 1696179 A2 Yet another possibility is known to lock a circuit board to a carrier. In this case, an attachment of the circuit board is provided at paragraphs, which they engage under a form-fitting holder, which can be made in particular by snapping or clipping.

Task and solution

The invention has for its object to provide an aforementioned hob and a method for mounting a hob, with which problems of the prior art can be avoided and it is particularly possible that construction and installation technically simple but structurally reliable and stable.

This object is achieved by a hob with the features of claim 1 and a method for assembling such a hob with the features of claim 10. Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below. Some of the features are only mentioned for the hob or only for the assembly process. However, they should be able to apply independently of both for the hob and for the assembly process independently.

The wording of the claims is incorporated herein by express reference.

It is envisaged that the cooktop, which is advantageously an induction cooktop, has a cooktop plate and a housing arranged underneath for receiving functional units of the cooktop. The housing is advantageously flat and particularly advantageous with respect to the surface only slightly smaller than the hob plate, for example 1% to 10% smaller. The height may be a few cm, preferably 1 cm to 5 cm or 10 cm. In particular, heating devices and / or control devices, that is to say power electronics or control electronics, can be arranged therein as functional units of the hob. Particularly advantageous for an induction hob, the induction coils are placed on top of the housing and pressed by this to the underside of the hob plate.

According to the invention, it is provided that two opposite fastening rails are fixedly arranged at the bottom or on the underside of the hob plate. Advantageously, they are glued to the underside of the hob plate. The hob plate itself is advantageously made of conventional material, in particular hard glass or glass ceramic. A first mounting rail has a U-shaped groove which runs along its length, particularly advantageously runs continuously. This U-shaped groove is open in a direction approximately parallel to the surface of the hob plate toward or towards the other mounting rail. The second fastening rail is designed so that the housing is applied to it from below and fastened thereto, preferably by means of releasable fastening means such as screws, bolts, clips or latching hooks. Preferably, both mounting rails are glued as separate parts on the underside of the hob plate.

Thus, an assembly of the housing to the hob plate is possible by inserting or inserting the housing in the first mounting rail or its U-shaped groove. Thus, a holder of the housing in the direction away from the hob plate, at least on this side of the housing. Furthermore, a simple and releasable attachment to the other mounting rail can be made to also hold the housing on the other side and thus a total of fixed to the hob plate. Extend the mounting rails over a substantial part of the length of the housing or the hob plate, an overall stable attachment is possible.

The advantage of inserting the housing into the U-shaped groove is that here no step of attachment with screws or the like. what is needed is fast, reliable and easy for assembly.

In the invention, the housing on at least one side on a longitudinal projection or a longitudinal outer edge, with which it is inserted into the U-shaped groove of the first mounting rail and then protrudes into this, so as to be supported. For stable attachment, it may protrude a few mm, for example at least 3 mm to 10 mm or even 20 mm. Furthermore, the housing can protrude at a plurality of points punctiform or only a short length in the U-shaped groove. Alternatively, it may extend over a greater portion of its length, advantageously over much of its length.

According to the invention the clear height of the U-shaped groove of the first mounting rail is at least slightly larger than the height of the inserted longitudinal extension or the longitudinal outer edge of the housing.

It can be provided that at least the first fastening rail has a profile with at least one section-wise U-shaped cross section or is such a profile. In a simple embodiment, the first mounting rail is a U-profile and can be easily manufactured and mounted. The material on the one hand plastic and on the other hand offers metal, in particular because of the greater stability and heat resistance, preferably aluminum.

According to the invention, the housing is mounted directly to an underside of the second mounting rail for attachment and touches them. This can, as described above for the first mounting rail, be punctiform or in a few areas, particularly advantageous but on a substantial part of the length or on the entire length. In this case, the aforementioned releasable fastening means of the housing can be used, so clips, snap-in connections or screws, advantageously several of them and distributed over the said length. If the second fastening rail is formed as a simple, substantially continuous profile, advantageously made of metal, then it makes sense if integrated fastening means such as clips or snap-in connections are then arranged or formed on the housing, which is usually made of plastic. Of course, screws as fasteners can be used separately.

Also, the second mounting rail, as described for the first mounting rail, at least in sections have a U-shaped cross-section. It can alternatively be designed as a simple angle or box-like. Advantageously, the second mounting rail is a U-profile and may consist of the same material as the first mounting rail. Particularly advantageously, the fastening rails are designed identically to reduce the number of different parts.

On the second mounting rail preparatory work for the releasable attachment of the housing may be made, either by molding during manufacture of the mounting rail or thereafter. Holes may be pre-drilled or prefabricated for fastening by screws.

For stable mounting of the housing, at least one of the mounting rails, advantageously both, should extend substantially over the entire width of the side of the hob plate or the housing on which it is arranged. At least it should allow for a housing with a rectangular base attachment of the corner areas and thus be present in the corner areas, advantageously also in the middle between. This allows a uniform attachment can be achieved.

It is advantageously provided that the fastening rail are arranged close to the outer edge of two opposite sides of the hob or the hob plate. In particular, the mounting rails are arranged along the longer sides of a rectangular cooking plate. Thus, the most stable possible holder of a housing is achieved, which is advantageously similar in size to the hob plate or only slightly smaller.

This described mounting method is relatively simple, because only the two mounting rails must be attached or glued to the underside of the hob plate for preparation. Then, a housing in which functional units of the hob such as heaters, power and control electronics are inserted with a corresponding longitudinal extension or a longitudinal outer edge in the U-shaped groove of the first mounting rail. In this case, the housing is held slightly obliquely with respect to the hob plate with the longitudinal approach or the longitudinal outer edge upwards.

Then, the housing is pivoted against the underside of the hob plate until it rests against the other second mounting rail, advantageously with the other longitudinal approach or the longitudinal outer edge. With the aforementioned fasteners then the attachment.

The space required for this insertion and pivoting in the groove of the first mounting rail can be compensated for, that the housing together with the functional units contained therein is applied or pressed with some pressure to the underside of the hob plate. Especially in the case of induction heaters arranged on top of the housing, which have some inherent elasticity through an applied layer of thermal insulation, this is quite possible. Furthermore, the dimensions can be adjusted accordingly.

The housing itself can consist of a single part. In general and above all with continuous fastening rails on both sides, a housing can also consist of several housing parts, which advantageously extend at least from one fastening rail to the other. In this case, partially identical housing parts can be provided, which are modular and possibly expandable. Such multi-part housing are for example from the DE 102012217059.6 the same applicant with filing date of 21 September 2012, to which reference is expressly made.

These and other features are apparent from the description and the drawings, as well as from the claims. The subdivision of the application into individual sections as well as intermediate headings does not restrict the general validity of the statements made thereunder.

Brief description of the drawings

• Fig. 1 eine schräge Draufsicht auf ein Gehäuse zur Aufnahme von Funktionseinheiten eines Induktionskochfeldes mit Befestigungsschienen,
• Fig. 2 einen Schnitt durch das Gehäuse und die Befestigungsschienen aus Fig. 1,
• Fig. 3 eine starke Vergrößerung der Schnittdarstellung aus Fig. 2 am linken Ende des Gehäuses,
• Fig. 4 eine Draufsicht auf die Schnittebene entsprechend Fig. 3,
• Fig. 5 eine Darstellung ähnlich Fig. 3 des rechten Teils des Gehäuses samt rechter Befestigungsschiene,
• Fig. 6 eine Darstellung entsprechend Fig. 4 des rechten Teils des Gehäuses,
• Fig. 7 bis 9 eine Darstellung der Befestigung des Gehäuses an Befestigungsschienen, die an die Unterseite einer Kochfeldplatte angeklebt sind und
• Fig. 10 eine Seitenansicht eines fertigen Induktionskochfeldes.

Embodiments of the invention are shown schematically in the drawings and are explained in more detail below. In the drawings show:

• Fig. 1 an oblique top view of a housing for receiving functional units of an induction hob with mounting rails,
• Fig. 2 a section through the housing and the mounting rails Fig. 1 .
• Fig. 3 a strong enlargement of the sectional view Fig. 2 at the left end of the case,
• Fig. 4 a plan view of the cutting plane accordingly Fig. 3 .
• Fig. 5 a representation similar Fig. 3 the right part of the housing together with the right fastening rail,
• Fig. 6 a representation accordingly Fig. 4 the right part of the case,
• Fig. 7 to 9 a representation of the attachment of the housing to mounting rails, which are glued to the underside of a hob plate and
• Fig. 10 a side view of a finished induction hob.

Detailed description of the embodiments

In Fig. An oblique view from above of a housing 11 is shown, which contains functional units for an induction hob, which from the Fig. 10 can be seen in the assembled state. The housing 11 consists of three housing parts 12a, 12b and 12c. As from the above DE 102012217059.6 shows, the housing parts 12a and 12b are identical, but rotated by 180 ° in the plane to each other, and then connected to the central housing part 12b together. Thus, they form a total of the housing 11. The housing parts 12a and 12b have receptacles 13 on which induction heating devices or induction coils can be placed, which then rest with their top on the underside of a hob plate. In the middle housing part 12c further functional units for the induction hob can be arranged, in particular a control electronics and power electronics, for the clearly visible in the lateral housing parts 12a and 12b fan openings 15a and 15b are provided.

The existing of the three housing parts 12a to 12c housing 11 is inserted on the left in a first or left mounting rail 15a, as will be explained in more detail below. The left mounting rail 15a extends over the entire length of the housing 11 and is surmounted only by two Gehäusewangen to prevent displacement in the mounting rail. At a second or right mounting rail 15b, the housing 11 is attached and secured from below, as also shown and described below.

From the sectional view in Fig. 2 is along with the magnifications shown in the same perspective in Fig. 3 and Fig. 5 It can be seen that on the housing 11, shown here by way of example on the central housing part 12c, a protruding longitudinal projection 17c is provided, which is inserted into the mounting rail 15a. From this representation as well as those of Fig. 4 It can be seen that the left mounting rail 15a is a U-shaped or U-shaped with a right-facing U-shaped groove 26a. With an upper leg 27a, the left mounting rail 25a is glued or otherwise attached to the underside of a hob plate. On the lower leg 28a of the longitudinal projection 17c of the central housing part 12c is located.

Furthermore, a screw hole 19c is formed here in the longitudinal extension 17c. This is not needed for the mounting rail 25a, but for the other mounting rail, as will be explained below.

The left mounting rail 25a may be about 2 cm high, have a thickness of 1 mm to 2 mm and made of aluminum, so be an easily manufacturable aluminum profile. It is also sufficiently stable for the attachment of the housing 11. The longitudinal extension 17c is 0.5 cm to 2 cm from the housing, preferably about 1.5 cm to 2 cm.

In the FIGS. 5 and 6 is the right mounting rail 25b shown, which is also secured with its upper leg 27b on the underside of a hob plate. The right longitudinal extension 18c is applied to the underside of the lower leg 28b of the mounting rail 25b and fastened there. For attachment is a screw 23 which penetrates the screw hole 19 of the right longitudinal extension 18c and engages in a predrilled hole 30b in the lower leg 28b, advantageously as a so-called tapping screw, so self-tapping. The upper tip of the screw 23 protrudes freely into the groove 26b of the mounting rail 25b.

From a comparison of Fig. 4 and 6 It is clear that the mounting rails 25a and 25b are formed differently or different heights, while the upper leg 27 and lower leg 28 are the same length. But important is the identical design of the longitudinal projections 17 and 18, which is provided on all three housing parts 12a to 12c. This makes it possible to achieve the interchangeability of the housing parts 12a and 12b. In the left mounting rail 25a, the screw holes 19 are not needed, but just for the right mounting rail 25b.

As an alternative, it is easy to imagine that an attachment of the housing part 12c with the right longitudinal approach 18c is not carried out by means of screw 23, but by means provided to the left of the screw hole 19 latching hooks which engage in the groove 26b, but are also releasable. For this purpose, the groove 26b could also be open away from the housing part 12c. Instead of the screw 23 could also Klemmnippel or the like. be provided.

The method for mounting an induction hob can be calculated from a comparison of Fig. 7 to 9 and 6 seen. According to the Fig. 7 is attached to a bottom 33 of a hob plate 32, the left mounting rail 25 a, in particular glued, with the top of its upper leg 27 a. The housing 11 is inserted obliquely to the left above with the longitudinal projection 17 corresponding to the arrow in the groove 26 a and is as before in Fig. 8 shown. Then, the housing 11 is pivoted counterclockwise until induction heaters in the housing 11 abut against the underside 33 of the hob plate 32. At the right edge or at the right mounting rail 25b then the state is in accordance Fig. 9 in front. The right mounting rail 25b is also adhered to the underside 33 of the hob plate 32 with the upper leg 27b. The pivoting of the housing 11 about the left longitudinal extension 17 is carried out just so that this longitudinal projection 17 rests against the underside of the lower leg 28 of the mounting rail 25b. In this case, the right screw hole 19b comes in the longitudinal extension 17 with the hole 30 in the lower leg 28b in coverage. Subsequently, the screw 23 is screwed into the mounting rail 25b and the lower leg 28b, so that the state accordingly Fig. 6 is present.

In Fig. 10 a completely finished induction hob 35 is shown, so the housing 11 together with hob plate 32. Here are also schematically induction heating 37 shown in the form of known, round induction coils. They rest on the receptacles 13 and are elastically pressed against the underside 33 of the hob plate 32.

Claims (11)

1. Cooking hob, in particular induction cooking hob (35), comprising a cooking hob plate (32) and a housing (11) disposed underneath for accommodating functional units (37) of the cooking hob, wherein on a bottom side (33) of the cooking hob plate (32) two opposite fastening rails (15a, 15b) are fixedly arranged, wherein a first fastening rail (15a) includes a U-shaped groove (26a) extending along the length thereof, said groove being open in a direction parallel to the cooking hob plate (32), wherein the housing (11) has on one side a longitudinal lug (17) or a longitudinal outer edge and projects into the U-shaped groove (26a) of the first fastening rail (15a) with the longitudinal lug (17) or the longitudinal outer edge, wherein the clear height of the U-shaped groove (26a) is at least somewhat greater than the height of the inserted longitudinal lug (17) or the longitudinal outer edge,
   characterized in that
   the second fastening rail (15b) is configured for fastening the housing (11) applied from the underside by means of removable fastening means (23), wherein the housing (11) is applied directly to an underside of the second fastening rail (15b) and contacts the latter, wherein the removable fastening means (23) are provided for the second fastening rail (15b).
2. Cooking hob according to claim 1, characterized in that the functional units are heating devices (37) and/or control devices.
3. Cooking hob according to claim 1 or 2, characterized in that the first fastening rail (15a) has at least partially a U-shaped cross section, in particular is a U-shaped profile.
4. Cooking hob according to any one of the preceding claims, characterized in that the first fastening rail (15a) and/or the second fastening rail (15b) are/is made of metal or aluminum.
5. Cooking hob according to any one of the preceding claims, characterized in that the removable fastening means are clips, snap-on connectors or screws (23).
6. Cooking hob according to any one of the preceding claims, characterized in that the second fastening rail (15b) at least partially has a U-shaped cross section, in particular is a U-shaped profile, and preferably includes predrilled holes (30b) for fastening the housing (11).
7. Cooking hob according to any one of the preceding claims, characterized in that the fastening rails (15a, 15b) have different designs, wherein preferably both fastening rails have or are U-shaped profiles.
8. Cooking hob according to any one of the preceding claims, characterized in that at least one of the fastening rails (15a, 15b) extends essentially over the entire width of the side of that cooking hob plate (32) where it is located in the vicinity.
9. Cooking hob according to any one of the preceding claims, characterized in that the fastening rails (15a, 15b) are arranged near an outer border of two opposite sides of the cooking hob (35).
10. Method for installation of a cooking hob (35) according to any one of the preceding claims, characterized in that in a preceding step two spaced fastening rails (15a, 15b) are attached to an underside (33) of a cooking hob plate (32) as a first fastening rail (15a) and as a second fastening rail (15b), and in a further step a housing (11) including functional units (37) of the cooking hob (35) therein with a longitudinal lug (17c) or a longitudinal outer edge is inserted into a U-shaped groove (26a) of the first fastening rail (15a) and, subsequently, the housing (11) is turned towards the underside (33) of the cooking hob plate (32) up to abutment on the underside of the second fastening rail (15b), wherein the housing (11) is then in a further step fastened to the second fastening rail (15b) using fastening means (23).
11. Method according to claim 10, characterized in that the two spaced fastening rails (15a, 15b) are adhesively bonded.

Images