EP1947392B1 - Hotplate - Google Patents

Description

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

Usually, in hobs such as induction hobs on a support plate of the hob heating devices are arranged and under the support plate, a control housing is mounted, which has a control or electronics for the hob. There are provided connecting means to releasably connect the support plate and the control housing as two parts with each other during the assembly of the hob. Usually, the control housing is bolted to the support plate, for example with four tapping screws at the corners of the control housing as a connecting means. This step of screwing is relatively time-consuming and slows or increases the cost of production of the hob.

From the EP 1 120 999 A2 is a household appliance with a hob is known in which below the hob, a support means is provided, on which a housing for a control and / or display device is arranged. In this case, the housing for connection to the support means on its underside projections, which engage from above into corresponding, corresponding recesses in the support means. The housing is placed from above on the support means and is held by its weight on the support means. Alternatively, the housing can also be connected by means of one or more latching or snap connections with the support means, by means of which then a weight of the housing can be accommodated.

From the DE 198 06 690 A1 It is known to arrange components on a plate-shaped support member and to connect this with the aid of different positive connections with the support member. For this purpose, inter alia latching connections are provided which are each formed by a member arranged on the spring clip with a latching lug and a corresponding recess in the support member, wherein the latching lug of the spring clip is engaged in the associated state in each case in the connected state. The other form-fitting connections are formed by arranged on the underside of the component, mushroom-shaped holding elements in the form of vertically downwardly projecting shafts with heads and corresponding slot-like passage openings in the support member. In this case, the passage openings are keyhole-shaped, wherein the outer diameter of the heads is in each case smaller than the largest opening width and larger than the smallest opening width of the passage openings. To join these compounds, the component is arranged on the support member such that the stems with the heads penetrate the passage openings in the region of the greatest opening width. Subsequently, the component is moved along the slot-like passage opening, so that in the connected state, the mushroom-shaped holding elements penetrate the passage openings in the region of the smallest opening width and thus the component is secured against lifting from the support member. The locking connection serves to secure the other connections and is designed such that a displacement of the component or a self-acting Loosen the connections in the connected or locked state is no longer possible.

From the US 6272008 B1 It is known to provide a quick release connection for mounting a device housing in a computer case. In this case, recesses are provided on an underside and optionally on a lateral side of the device housing, in which projections or hooks of the computer housing can intervene. On an upper side of the device housing movable projections are provided which engage in corresponding recesses on an upper cross member of the computer case when applying and prevent an automatic release of the compound.

Task and solution

The invention has for its object to provide an aforementioned cooktop, can be avoided with the problems of the prior art and in particular a production of the hob easier and faster possible, and further dismantling of the support plate and control housing can be done.

This object is achieved by a hob with the features of claim 1. Advantageous and preferred embodiments of the invention are the subject of further claims and are explained in more detail below. The wording of the claims is incorporated herein by express reference.

According to the invention, it is provided that the connecting means for the support plate and control housing have hooks and corresponding recesses. The hooks are provided on the support plate and the recesses on the control housing. The hooks are designed for attachment to or in the recesses on the other part, wherein this attachment of the two parts takes place in a Ansetzrichtung. Furthermore, the hooks and recesses are designed so that subsequently the two parts are moved relative to one another in a direction deviating from the attachment direction. As a result, the actual connection is made when the two parts are present to each other in an end position. In order to prevent a moving back, so a release of the support plate and control housing, the two parts out of the end position, a movable projection is provided on the one part and on the other part of a detent in the form of a protruding expression. When moving the two parts moved to the end position the projection over the lock away. Thus, a positive connection with the lock is effected in the end position. The movable projection is provided on the control housing and the lock on the support plate.

Furthermore, the invention provides that the control housing is attached in the Ansetzrichtung to the support plate, in which case the hook engage in the recesses. By a movement in the end direction, the hook engage behind the recesses for positive connection. If the two parts are in the end position of the assembly or connection, then the movable projection with the locking has formed a positive connection in order to prevent loosening of the two parts. This positive connection is releasable, for example, for a repair case, in particular by bending back the projection of the lock away. So can on separate fasteners such as screws or the like. be waived, at least for the preparation of the compound itself.

The movable projection is biased or resiliently designed so that it interacts automatically with the lock. In particular, it can automatically engage in the form-fit, for example by itself when moving the two parts in the end direction into the end position. The movable projection is designed as a kind of elongated spring tongue. When attaching the two parts together in the Ansetzrichtung the movable projection is in front of the expression and is then moved across the expression and engages with positive locking behind them. For this purpose, the direction of movement of the movable projection is advantageously oblique or transverse to the end direction. For such automatic movement of the movable Projection over the expression across the expression can have a chamfer on the side on which the projection comes to rest when applying, and then move when moving the two parts in the final direction on the expression, so to speak, by bending away. On the other side, on which the movable projection rests in the end position, the expression should be straight or have no bevel, so that a return movement is possible only by bending away the projection.

In a further embodiment of the invention, in addition to a possibly automatically producible interlocking connection between locking and movable projection releasable fastening means may be provided, such as screws or bendable tabs with which the movable projection is attached to or behind the lock against moving back.

The hooks are provided on the support plate and corresponding recesses on the control housing, in particular on one of the control housing flange-like outward wide edge which rests flat against the support plate. It is particularly preferably provided that on both sides of the control housing in each case a plurality of recesses and corresponding hooks are provided for a secure and a completely stable attachment of the support plate and control housing to each other. It is advantageous if at one part only hooks and only recesses are provided on the other part, wherein hooks and recesses may be formed the same or identical.

In order to simplify the assembly further and make it safer, it can be provided that hooks and corresponding recesses are distributed or arranged such that the control housing can be attached to the support plate only in a single possible position or position. This avoids errors caused by swapping during assembly as well as possible subsequent repair.

In a further embodiment of the invention can be provided that the hook and the recesses are formed such that the example slot-shaped recesses when engaging the hook have a certain amount of play, which allows, so to speak, a tolerance in the accuracy of preparation. In particular, the recesses may be slightly wider and also a good deal longer than the hooks. Furthermore, they should be designed so that when moving the two parts in the end direction in the end position in this game is less or at least in the final position a tight fit is guaranteed. This is possible by bevels or thickening in the area behind the recesses, on which the hooks rest when moving into the end position.

The invention further provides that the movable projection comes to rest on a manifestation as a lock when engaging the hooks in the corresponding recesses or when attaching the control housing to the support plate. The spring force of the projection can be easily overcome when applying, so that the projection bends back accordingly. If then the control housing is moved in the end direction of the support plate in the end position, engages or snaps the movable projection behind the expression and establishes the positive connection.

It can be provided that the support plate is significantly larger than the control housing, for example, twice to five times as large. Furthermore, the control housing is advantageously attached approximately centrally or centrally to the support plate and also has the same shape. Both parts can be advantageously made of sheet metal, in particular the support plate.

These and other features are apparent from the claims and from the description and drawings.

Brief description of the drawings

Fig. 1A

ein Teil eines Kochfelds in Form eines Tragblechs und eines Steuerungsgehäuses darunter im noch nicht angesetzten Zustand,

Fig. 1B

eine Vergrößerung eines Ausschnitts aus Fig. 1A,

Fig. 2A

die beiden Teile aus Fig. 1A im aneinander angesetzten Zustand,

Fig. 2B

eine Vergrößerung eines Ausschnitts aus Fig. 2A,

Fig. 3A

die beiden Teile aus Fig. 2A nach Bewegen entlang der Endrichtung in die Endstellung und

Fig. 3B

eine Vergrößerung eines Ausschnitts aus Fig. 3A.

An embodiment of the invention is shown schematically in the drawings and will be explained in more detail below. In the drawings show:

Fig. 1A

a part of a hob in the form of a support plate and a control housing underneath in the not yet attached state,

Fig. 1B

an enlargement of a section Fig. 1A .

Fig. 2A

the two parts off Fig. 1A in the attached state,

Fig. 2B

an enlargement of a section Fig. 2A .

Fig. 3A

the two parts off Fig. 2A after moving along the end direction to the end position and

Fig. 3B

an enlargement of a section Fig. 3A ,

Detailed description of the embodiment

In Fig. 1A are shown as a part of a hob or as an intermediate step in its mounting a support plate 13 and a control housing 20. The support plate 13 has a folded-down peripheral edge 14 which surrounds an underside 15. The underside 15 has a central opening 16 for connections between a controller in the control housing 20 and heaters or induction coils, which are placed on top of the support plate 13, but not shown here. Furthermore, the underside 15 on the support plate 13 a plurality of exposed and pointing to the right hook 17 and an expression 18. From the magnification in Fig. 1B It can be seen that, on the one hand, the hooks 17 are designed for a specific direction and are of the same design. Furthermore, it can be seen that the feature 18 on the right side has a bevel 19, while it protrudes to the left approximately at right angles from the support plate 13.

Around the control housing 20 with a likewise circumferential, laterally projecting edge 21 recesses 23 in the form of slots are provided in this edge 21 close to the control housing 20, namely six recesses 23 along the two longitudinal sides of the control housing 20. Right next to the recesses 23 points the edge 21 thickenings 24 on. This is especially good Fig. 1B to see. This will be discussed later.

At the right-facing end face of the control housing 20, a spring tongue 26 is provided. This is bendable along the dashed line out of the other edge 21 and separated from the edge 21 on the line shown in solid line. This is off then Fig. 2B even clearer.

The control housing 20 is along the mounting direction A according to Fig. 1A attached to the support plate 13 or the other way round. A controller or electronics is already in the control housing 20.

In Fig. 2A is shown as the control housing 20 in the mounting direction A according to Fig. 1A has been attached to the support plate 13. All hooks 17 engage through the corresponding recesses 23 in the control housing 20 and in its edge 21. As above all Fig. 2B can be seen better in magnification, the spring tongue 26 comes when fitting exactly on the expression 29 or with their in Fig. 2B left upper edge in the region of the chamfer 19 to lie. Therefore, it is bent at its right lower severed end of the edge 21.

Now, the control housing 20 along the end direction E according to Fig. 2A moved on the support plate 13 or the other way around. At the end of this movement is in the end position according to Fig. 3A a hob 11 in front. This is especially on Fig. 3B directed with the magnification. From this it can be seen how the hooks 17 not only overlap any area of the edge 21 at the end of the recesses 23, but just overlap the thickenings 24. This ensures a good fastening action of the control housing 20 to the underside 15 of the support plate 13, in particular if the thickenings 24 increase away from the recesses 23 or become thicker.

Furthermore, most of all Fig. 3B to recognize that the spring tongue 26 engages behind the expression 18 or comes to rest next to this and thus in turn substantially flat against the support plate 13 as the other edge 21 also. Since the expression 18 on the left-facing side has no chamfer, in a movement of the control housing 20 against the end direction E, the spring tongue 26 do not slip over the expression 18 and thus a non-automatically releasable positive connection is formed. This prevents that the two parts can be moved against each other to solve each other. The expression 18 forms the locking described above.

Especially from the Fig. 2B and 3B It can be seen that it is also possible that the edge 21 of the control housing 20 in place of a separate movable spring tongue 26 has a certain flexibility or flexibility. Thus, he himself can be bent when attaching the control housing 20 to the support plate 13 or recede on the expression 18 and lie for a similar positive fit behind the expression 18 for locking.

The release of the positive connection can easily take place in that the spring tongue 26 is bent away from the support plate 13 and thus no longer rests on the expression 18. For this purpose, for example, be provided that left of the expression 18 a hole or the like. is provided in the support plate 13, through which the spring tongue 26 can be pushed away from above with a push-through tool.

It is also based on the Fig. 3B It will be readily apparent to those skilled in the art that instead of the feature 18, a larger opening could be provided in the support plate 13 at the location where the spring tongue 26 lies. This spring tongue 26 can be pressed either automatically or by a tool up into this recess of the support plate 13 or engage, so that also a not automatically releasable positive engagement is given. The disadvantage here would be that the spring tongue over the top of the support plate 13 protrudes and could be in the way here.

Furthermore, in Fig. 3A dashed a glass ceramic plate 12 shown. This is applied to the cooking plate 11 on the support plate 13, when the induction coils have been applied to the top of the support plate 13. A main mechanical connection between the glass ceramic plate 12 and the support plate 13 may by a non-illustrated, outer peripheral edge, terminals or the like. getting produced.

Based on Fig. 3B It is also easy for the skilled person to see how the spring tongue 26 can be connected to the support plate 13, for example by means of a tapping screw either from above first by the support plate 13 or from below first by the spring tongue 26. Other fasteners are easily feasible.

The advantage of the attachment of the hooks 17 on the support plate 13 or on its underside 15 and the recesses 23 on the edge 21 and the control housing 20 is that the top of the support plate 13 may be formed completely flat and without protruding parts. As a result, the attachment of heating devices, in particular induction heating devices, is particularly simple.

Claims (10)

1. Cooktop (11) comprising a metal support plate (13) for arrangement of heating devices thereon and comprising a control casing (20) for a control unit or electronics, wherein fasteners (17, 23) are provided for detachable connection of the metal support plate (13) with the control casing (20), wherein metal support plate and control casing are two parts (13, 20) that in an assembled state of the cooktop (11) are connected with one another,
   characterized in that

   - the fasteners include hooks (17) on the underside (15) of the metal support plate (13) and include corresponding cuts (23) on the control casing (20), wherein the hooks are designed for attachment with the cuts (23) in an attachment direction (A) and for subsequent moving of the two parts (13, 20) relative to each other in a final direction (E) differing from the attachment direction (A) to obtain the connection in a final assembled position,

   - wherein on the control casing (20) there is a movable protrusion in the form of a type of longitudinal flexible tongue (26) and on the same underside (15) of the metal support plate (13) as the hooks (17) there is provided a catch in the form of a prominent projection (18) for the flexible tongue (26), wherein during moving into the final assembled position the flexible tongue (26) is moved towards the projection (18) and over the projection or into the projection and in the final assembled position cooperates with the projection (18) in a form-fitting manner, in order to prevent retraction from the final assembled position and detaching of metal support plate (13) and control casing (20).
2. Cooktop according to claim 1, characterized in that the flexible tongue (26) is prestressed or resilient for self-acting cooperating with the projection (18), in particular for self-acting engagement in the form-fitting condition.
3. Cooktop according to claim 2, characterized in that in the final assembled position the flexible tongue (26) engages in a form-fitting manner behind the projection (18) and the movement direction of the flexible tongue (26) is diagonal or perpendicular to the final direction (E) of the two parts (13, 20) into the final assembled position.
4. Cooktop according to claim 3, characterized in that the projection (18) has a slant (19) on the side facing away from the flexible tongue (26) in the final assembled position for moving the flexible tongue (26) over the projection (18) during moving the two parts (13, 20) in the final direction (E), wherein preferably the projection (18) on the side towards the flexible tongue (26) in the final assembled position is straight and extends along the movement direction of the flexible tongue (26), respectively.
5. Cooktop according to any one of the preceding claims, characterized in that the flexible tongue (26) during sliding the hooks (17) into the respective cuts (23) comes to rest against the projection (18).
6. Cooktop according to any one of the preceding claims, characterized in that the flexible tongue (26) is locked in the final assembled position in a form-fitting manner by detachable fixing means so as to prevent reverse movement over the projection (18), wherein preferably the fixing means are detachable, and in particular are a screw or a bendable clip.
7. Cooktop according to any one of the preceding claims, characterized in that the form-fitting condition between flexible tongue (26) and projection (18) is accessible only from the other side of the metal support plate (13), where the control casing (20) does not rest on.
8. Cooktop according to any one of the preceding claims, characterized in that a plurality of cuts (23) are provided on at least two sides of the control casing (20).
9. Cooktop according to any one of the preceding claims, characterized in that distribution of the hooks (17) and corresponding cuts (23) is such that metal support plate (13) and control casing (20) are attachable and connectable to each other in only one possible position.
10. Cooktop according to any one of the preceding claims, characterized in that the hooks (17) and the cuts (23) are formed such that when sliding the hooks (17) into the cuts (23) there is a clearance for easier sliding, wherein in the final assembled position they are sitting tightly and without clearance against each other, in particular by means of thickenings (24) in the vicinity of the cuts (23).

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