Household appliance and pull-out guide for household appliance

Abstract

The invention relates to a pull-out guide for a household appliance with microwave cooking function, comprising a body rail (1) and at least one running rail (2) which can be moved relative to the body rail (1) and is used for placing a food material carrier, the body rail (1) and / or the running rail (2) having a U-shaped contour with a base (11, 12), 21) and two legs (12, 22). The pull-out guide is characterized in that in the end regions (14, 23) of the body rail (1) and / or of the running rail (2), the legs (12, 22) are electrically connected to one another by means of contact elements (3), the contact elements (3) being arranged at a distance from the base (11, 21).

Description

Technical Field

[0001] The present invention relates to a pull-out guide mechanism for a household appliance with a microwave cooking function, comprising a main body rail and at least one running rail movable relative to the main body rail for placing a food rack, wherein the main body rail and / or the running rail have a U-shaped profile with a base and two legs. The present invention also relates to a household appliance with a microwave cooking function having the above-mentioned pull-out guide mechanism. Background Art

[0002] Pull-out guides are already established in various types of domestic appliances, on which removable racks, for example food racks such as baking trays or grills, can be placed and can be conveniently pushed into the domestic appliance or more easily pulled out and removed.

[0003] Extension guides in which the body rail and / or the running rail have a U-shaped profile have proven advantageous, since they allow for a compact design and offer good protection against the ingress of dirt due to the U-shaped profile. Typically, the U-shaped profile is punched and bent from sheet metal.

[0004] To prevent injuries from sharp edges at the front of the running rail, and for aesthetic reasons, it is known to seal the front end of the running rail's U-shaped profile. This can be done completely by welding a plate or by inserting a plug. Typically, a portion of the plate or plug protrudes upward from the supporting surface of the running rail, providing support for the food carrier placed thereon and preventing it from sliding off the running rail when pulled out of the cooking chamber. The rear end of the U-shaped main body rail is usually left open.

[0005] In microwave cooking chambers using metal running rails or body rails with a U-shaped profile, it has been shown that when the front and / or rear ends of the rails are open, the temperature of the metal elements within the volume enclosed by the U-shaped profile increases relative to the surrounding area, thereby reducing the efficiency of the microwave cooking device. Similar characteristics are observed when the profile rails are closed with plugs made of electrically insulating material. Summary of the Invention

[0006] The object of the present invention is to provide a pull-out guide for a household appliance with a microwave cooking function and a household appliance equipped with the pull-out guide, wherein even if the ends of the U-shaped running rail and / or the body rail are open or closed by an electrically insulating material, a temperature increase of the components located in the volume enclosed by the respective rail can be largely prevented or at least reduced.

[0007] This object is achieved by a pull-out guide or a domestic appliance with a microwave cooking function having the features of the respective independent claim. Advantageous embodiments and improvements are the subject matter of the dependent claims.

[0008] A pull-out guide of the type described above according to the invention is characterized in that in the end region of the body rail and / or the running rail the legs are electrically connected to one another via contact elements, wherein the contact elements are arranged at a distance from the base.

[0009] It has been shown that if the free ends of the legs are electrically connected to each other, microwaves can no longer penetrate the end-face openings of the profile of the running rail or main rail. This connection forms a closed, conductive, ring-shaped structure consisting of the rail base, legs, and contact elements, which reflects microwaves. The remaining open area—the opening of the ring-shaped structure—is sufficiently small for extension guide rails, which typically have a height and width ranging from a few millimeters to approximately one centimeter, respectively, that microwaves cannot penetrate deeper into the volume enclosed by the corresponding rail. This prevents or significantly reduces unnecessary and undesirable heating, such as that of the rolling element cage of the extension guide. Arranging the contact element in the area of only one of the two end faces significantly reduces the temperature increase. Complete shielding of the entire opening area is not necessary, which saves material and allows the end face of the rail—except for the area of the contact elements—to be covered by other means, such as with an insulating plug.

[0010] It should be noted that, for the purposes of this application, a "U-shaped" main rail or running rail includes any form in which two lateral legs are spaced apart from each other on a base. These two legs can be the same or different lengths and form the same angle with the base, particularly a right angle, or different angles. Furthermore, each leg, particularly at its free end, can be designed to be straight, bent, or curved. Therefore, for the purposes of this application, a trapezoidal or C-shaped shape also falls within the definition of a "U-shaped" shape.

[0011] In an advantageous embodiment of the pull-out guide mechanism, the body rail and / or the running rail are made of metal. Furthermore, it is advantageous if the contact element is made of metal sheet or metal wire. Due to its high electrical conductivity, it can achieve good shielding against microwaves.

[0012] In another advantageous embodiment of the extension guide, the contact element is U-shaped and has a base and two lateral legs. The contact element thus formed can be easily inserted into the body or running rail, wherein the legs of the contact element preferably contact the legs of the body rail or running rail on their inner sides, and the bases are opposite each other.

[0013] In one embodiment, recesses can be provided in the legs of the body rail and / or the running rail, into which the contact elements engage in a snap-fit manner. For this purpose, the contact elements preferably have outwardly flared contact tabs at the free ends of their legs, via which the contact elements engage in the recesses. The U-shaped geometry of the contact elements creates a spring action, thereby achieving both a snap-fit mechanical fixation of the contact elements and a good electrical contact.

[0014] Alternatively or additionally, the contact element can be welded to the legs of the body rail and / or running rail. For this purpose, a U-shape of the contact element is also advantageous, wherein the legs of the contact element rest as flatly as possible on the rail legs. Welding is then preferably performed using a spot welding process.

[0015] In another advantageous embodiment of the pull-out guide mechanism, a plug is inserted into the front end of the running rail and / or the rear end of the main body rail, with the contact element arranged on or in the plug. The plug covers the main body rail and / or running rail from the end face, thus protecting them from potentially sharp edges. Furthermore, the plug can be made of an electrically insulating material, thereby effectively preventing arc discharges from the running rail to the front structure of the microwave cooking device. Further advantages arise if the plug's material also has thermal insulation and / or shock-absorbing properties. Furthermore, in this embodiment, the plug is used to accommodate the contact element. Therefore, by inserting the plug into the rail, the legs of the U-shaped profile are also contacted in one step.

[0016] In one embodiment, the plug comprises an insert body that is fixed to the running rail and / or the body rail by clamping and / or snapping, wherein the contact element is arranged on the insert body and / or at least partially in the insert body. Preferably, at least one recess is present in the insert body, which at least partially accommodates the contact element, in order to fix it to the plug and to push the unit consisting of plug and contact element into the rail.

[0017] The following electrically insulating materials can be used for the plug: ceramics, high-temperature-resistant thermoplastics, in particular materials from the polyetherketone family (eg polyetheretherketone—PEEK) and / or elastomers, in particular materials from the silicone family or thermosetting plastics.

[0018] The household appliance with microwave cooking function according to the present invention is characterized in that it has at least one pull-out guide mechanism as described above, thereby producing advantages related to the pull-out guide mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained in detail by means of the following examples and with the aid of the accompanying drawings.

[0020] Figure 1ais a perspective view of the pull-out guide mechanism of the first embodiment with the rear stop element and the disassembled front contact element;

[0021] Figure 1b yes Figure 1a pull-out guide with mounted contact elements;

[0022] Figure 2a is a perspective view of a second embodiment of a pull-out guide with a rear stop element and disassembled front and rear contact elements;

[0023] Figure 2b 、c is Figure 2a The pull-out guide with mounted contact elements in two different sliding positions;

[0024] Figure 3 yes Figures 1a-2c Detailed perspective view of the contact element;

[0025] Figure 4a b is Figures 1a-2c View of the front end section of the running rail of the extension guide with the disassembled ( Figure 4a ) or installed ( Figure 4b ) contact elements;

[0026] Figure 5a is a perspective view of a pull-out guide mechanism of a third embodiment with a rear stop element and disassembled front and rear contact elements;

[0027] Figure 5b 、c is Figure 5a The pull-out guide with mounted contact elements in two different sliding positions;

[0028] Figure 6 yes Figure 5a -c is a detailed perspective view of the contact element;

[0029] Figure 7a b is Figure 5a -c, view of the front end section of the running rail of the extension guide with the disassembled ( Figure 7a ) or installed ( Figure 7b ) contact elements;

[0030] Figure 8a is a perspective view of a pull-out guide mechanism of a fourth embodiment with a rear stop element and disassembled front and rear contact elements;

[0031] Figure 8b 、c is Figure 8aThe pull-out guide with mounted contact elements in two different sliding positions;

[0032] Figure 9 yes Figure 8a -c is a detailed perspective view of the contact element;

[0033] Figure 10a b is Figure 8a -c, view of the front end section of the running rail of the extension guide with the disassembled ( Figure 10a ) or installed ( Figure 10b ) contact elements;

[0034] Figure 11a -c is a view of the front end section of the pull-out guide mechanism in another embodiment, with the ( Figure 11a , b) or installed ( Figure 11c ) plug;

[0035] Figure 12a , b is similar to Figure 11b and 11c Views from different perspectives;

[0036] Figure 13a , b is a view of the front end section of the pull-out guide mechanism in another embodiment, with the disassembled ( Figure 13a ) or installed ( Figure 13b ) plug;

[0037] Figure 14a -c is based on Figure 13a 、b、Plug( Figure 14a , b) or running track ( Figure 14c ) with different views of the installed plug in a cross-sectional view;

[0038] Figure 15a , b is a view of the front end section of the pull-out guide mechanism in another embodiment, with the disassembled ( Figure 15a ) or installed ( Figure 15b ) plug; and

[0039] Figure 16a -c is based on Figure 15a 、b、Plug( Figure 16a , b) or running track ( Figure 16c ) with different views of the installed plug in a cross-section view. DETAILED DESCRIPTION

[0040] Throughout the figures, identical reference numerals designate identical or identically functioning elements. For the sake of clarity, not all elements in all figures are provided with reference numerals. If relative terms such as "left" or "right" are used in the description, these refer to the figure being described. Only the terms "front," "rear," "upper," and "lower" refer to the natural orientation of the pull-out rail during operation, with the food tray positioned on the pull-out rail from above and the front end of the pull-out rail facing the user in front of the household appliance in which the pull-out guide is used.

[0041] exist Figure 1a , b, shows the first embodiment of the pull-out guide mechanism of the present application.

[0042] The pull-out guide mechanism comprises a fixed body rail 1 that can be secured within or to the appliance using mounting elements (not shown), such as mounting clips. The pull-out guide mechanism is suitable for use with microwave cooking appliances. For example, the pull-out guide mechanism can be mounted to a side grill typically located within the cooking cavity of the appliance.

[0043] A food carrier, such as a baking tray or a grill, can be placed and moved into or out of the cooking chamber by means of the pull-out guide.

[0044] The extension guide comprises a running rail 2 which is mounted displaceably relative to the body rail 1. In the example shown, the body rail 1 as well as the running rail 2 and the mounting element are made of metal, for example of correspondingly stamped and bent sheet metal.

[0045] The running rail 2 is designed in this case in a U-shape, with an upwardly pointing base 21 and two lateral legs 22. The running rail 2 has a front end section 23 (in the extension direction) and an opposite rear end section 24. A stop element 4, in the form of a cylindrical pin, is fixed to the base 21 of the running rail 2 in the rear end section 24. The stop element 4 prevents the food carrier placed on it from slipping backwards. Furthermore, a damping cap can be placed on the pin to reduce the impact of the edge of the food carrier on the pin.

[0046] Between the body rail 1 and the running rail 2, there is a rolling element device which is not visible here, which allows the running rail 2 to move easily relative to the body rail 1. Other components such as other running rails or intermediate rails can also be arranged between the body rail 1 and the running rail 2 to achieve pull-out extension.

[0047] In the front end section 23 of the running rail 2, two grooves 25 are machined into the material of the running rail 2. The contact elements 3 are inserted into these grooves 25. Figure 1a In the figure, the contact element 3 is shown separately in the disassembled state before insertion; Figure 1b The extension guide is shown with the contact element 3 inserted.

[0048] The contact element 3 is made of an electrically conductive metal sheet and electrically conductively connects the legs 22 of the U-shaped running rail 2 to one another in their front end sections 23 .

[0049] This is based on the understanding that if the free ends of the legs 22 are electrically connected to one another, microwaves can no longer penetrate the U-shaped running rail 2 from the front. This connection forms a closed, annular, electrically conductive structure consisting of the base 21, legs 22, and contact elements 3, which reflects microwaves. The remaining open area—the opening of the annular structure—is sufficiently small for running rails 2, which typically have a height or width ranging from a few millimeters to approximately one centimeter, respectively, that microwaves cannot penetrate deeper into the volume enclosed by the running rail 2. This prevents or significantly reduces unnecessary and undesirable heating, such as that of the rolling element cage of the extension guide. This effect is already significant even if only one of the two end faces is provided with a contact element of the type described above.

[0050] In this case, a contact positioned as close as possible to the edge, both in the pull-out direction and in the direction of the free ends of the legs 22 of the U-shaped running rail 2 , has proven to be particularly effective.

[0051] exist Figure 2a In Figure 1-c, another embodiment of the pull-out guide mechanism of the present application is shown. Different from the first embodiment, this shows a so-called full pull-out, wherein in addition to the body rail 1 and the running rail 2, the pull-out guide mechanism also has an intermediate rail 5.

[0052] The structure of the running rail 2 in this second embodiment is substantially similar to that of the first embodiment. In this embodiment, the body rail 1 is also designed in a U-shape, having a base 11 and lateral legs 12. The body rail 1 has a front end section 13 and a rear end section 14. Similar to the groove 25 in the front end section 23 of the running rail 2, a groove 15 is formed in the leg 12 in the rear end section 14 of the body rail 1.

[0053] In this embodiment, each contact element 3 is inserted into the running rail 2 and the body rail 1, and is inserted into the corresponding grooves 25 and 15. This not only prevents microwaves from invading the inner volume enclosed by the running rail 2 from the front, but also prevents microwaves from invading the inner volume enclosed by the body rail 1 from the back. Figure 2a In the figure, the contact element 3 is shown separately in the disassembled state before insertion; Figure 2b , c show the pull-out guide with the inserted contact element 3 in two different pulled-out positions.

[0054] Figure 3The contact element 3 of the first two embodiments of the pull-out guide is shown in a perspective view. As mentioned above, the contact element 3 is made of an electrically conductive metal sheet, preferably stainless steel, but can also be aluminum, copper or bronze or another metal alloy.

[0055] In this example, the contact element 3 is bent into a U-shape and has a base 31 and legs 32. The free ends of the legs 32 flare outward, forming latches 33. When inserted into the body rail 1 or running rail 2, the latches 33 engage in the corresponding grooves 15 or 25. This achieves both a mechanically secure fit and good electrical contact with low contact resistance.

[0056] exist Figure 4a In FIG. 2 and FIG. 3 , the front part of the running rail 2 is again enlarged and shown as viewed from obliquely below in the direction of the U-shaped profile. Figure 4a In the figure, the contact element 3 is shown alone before insertion. Figure 4b In FIG. 2 , the contact element 3 has been inserted into the running rail 2 .

[0057] exist Figure 5a -c, 6 and 7a, b and Figure 8a -c, 9 and 10a, b, with Figure 2a -c, 3 and 4a, b show the third and fourth embodiments of the pull-out guide mechanism of the present application respectively in the same manner.

[0058] The basic structure in both cases corresponds to the second embodiment: a contact element 3 is arranged in the front end section 23 of the running rail 2 and a contact element 3 is arranged in the rear end section 14 of the body rail 1 .

[0059] Unlike the first two embodiments, the contact element 3 is not mounted on the rails 1, 2 in a snap-fit manner, but is welded. Preferably, a contact spot welding method is used, in particular as Figure 6 and Figure 9 , indicated by the location of the predetermined weld point 34 .

[0060] Figure 5a The contact element 3 of the third embodiment in -c, 6 and 7a, b is similar to the contact element 3 of the first two embodiments, being a U-shaped bent metal strip, except that it does not have the latch 33.

[0061] Figure 8a The contact element 3 of the fourth embodiment in Figures 10a-c, 10b, and 10c is a U-shaped bent wire clip, whose legs 32 have flattened portions at their free ends. These flattened portions form abutment surfaces 35, via which the contact element 3 abuts against the legs 12, 22 of the body rail 1 or running rail 2. The abutment surfaces 35 simplify the welding process, and the predetermined positions of the respective weld points 34 are correspondingly located on the abutment surfaces 35.

[0062] Figures 11a to 16c Three further embodiments of the pull-out guide are shown, whose basic structure corresponds to that of the pull-out guide of the first embodiment and comprises a body rail 1 and a U-shaped running rail 2. Only a front section of each pull-out guide is shown.

[0063] In all three embodiments, the stopper 6 is inserted from the front into the U-shaped profile of the running rail 2. To this end, the stopper 6 has an insert body 61 that is pushed into the profile of the running rail 2. After the insert body 61 is inserted, the stopper 6 abuts against the front end of the running rail 2 via abutment elements 62 that protrude laterally, and particularly upward, from the insert body 61. The abutment elements 62 prevent a food carrier placed thereon from sliding forward off the running rail 2.

[0064] Unlike the metal running rail 2, the stopper 6, and in particular the abutment element 62, is preferably made of an electrically insulating material, such as the plastic PEEK (polyetheretherketone). Thus, the abutment element 62 of the stopper 6 separates the metal of the running rail 2 from the door, cover, or other front structure of the microwave cooking appliance. This prevents potential sparkover between the front end of the running rail 2 and the front structure. Microwave cooking appliances often use doors or covers with panels that are equipped with conductive elements, such as conductive coatings or wires embedded in the glass. The material of the abutment element 62 or the stopper 6 can also be shock-absorbing and / or thermally insulating, thereby protecting the door or cover from mechanical and localized thermal loads.

[0065] In the embodiment shown, the stopper 6 is of one-piece construction, for example, made of plastic, such as the aforementioned PEEK, produced by an injection molding process. Alternatively, the stopper 6 can also be of a multi-component construction.

[0066] In the front region of the running rail 2, two grooves are formed in the base 21 of the running rail 2, into which latching elements of, for example, an insert 61 can engage, so that the plug 6 is fixed to the running rail 6 after being inserted. However, it is also possible to fix the inserted plug 6 to the running rail 2 by sinking the remaining bridge between the two grooves.

[0067] According to this application, Figures 11a to 16c In the three exemplary embodiments shown, contact elements 3 are also present, which electrically connect the legs 22 of the running rail 2 to one another in the front end section 23 , spaced apart from the base 21 . The contact elements 3 are each arranged in or on the plug 6 .

[0068] Figure 11a -c and 12a, b show a first embodiment of such a pull-out rail, in which the plug 6 carries the contact element 3 .

[0069] Figure 11a, b respectively show a section of the body rail 1 and the running rail 2, and the state of the plug 6 before being inserted into the front end of the running rail 2. In the inserting body 61 of the plug 6, a recessed portion 611 is processed on the side and from the bottom. Figure 11a The contact element 3, which is still shown separately in the figure, is inserted therein. The contact element 3 in this embodiment is a wire section bent in a U-shape.

[0070] Figure 11b and 12a The contact element 3 inserted into the insert body 61 is shown from two different perspectives. Figure 11c and 12b In FIG. 1 , the insert 61 is pushed into the running rail 2. It can be seen that the contact element 3 connects the legs 22 of the U-shaped running rail 2 to one another in the region of the front end section 23. Thus, in this end region, the contour of the running rail 2 is again electrically closed in an annular shape, thereby forming an effective shield against microwaves.

[0071] Figure 13a , b and 14 a - c show a second embodiment of a pull-out guide with a plug 6 and a contact element 3 . Figure 13a 、b's diagram and Figure 11b , c are equivalent. Figure 14a In FIG. 2 and FIG. 3 , the plug 6 is shown separately in a perspective view before or after the contact element 3 is mounted. Figure 14c A cross-section of the running rail 2 is shown, with the plug 6 inserted.

[0072] As described above Figures 11a to 12b Unlike the embodiment of the present invention, the contact element 3 here is a U-shaped bent metal plate instead of a wire segment. Accordingly, the recess 611 in the insert 61 is also designed to be wider. In order to better fix the contact element 3 on the insert 61, inwardly directed tongues 33 are formed on the legs 32, through which the contact element 3 is fixed in the recess 611. Basically, the effect is similar to the embodiment described above, but the wider width of the metal plate compared to the wire segment leads to a more reliable contact between the contact element 3 and the legs 22 of the running rail 2. Depending on the length of the individual legs 22 of the U-shaped running rail 2, the contact element 3 here can deviate from the symmetrical U-shape, such as Figure 14c As shown, in order to connect the end sections 25 of the legs over the shortest path.

[0073] at last, Figures 15a to 16c With Figures 13a to 14c A third exemplary embodiment of a pull-out guide with a plug 6 and a contact element 3 is shown in a similar manner.

[0074] Here, similar to the previous embodiment, a U-shaped metal plate is used as the contact element 3. Unlike the previous embodiment, the legs 32 of the U-shaped contact element 3 are along the pull-out direction, rather than perpendicular to it. The recesses 611 on the insert 61 are also aligned accordingly.

[0075] The advantage is that even when a greater clamping force is applied (which results in better contact between the contact element 3 and the running rail 2), there is no risk of the contact element 3 being squeezed out of the recess 611 during insertion into the running rail 2. To achieve particularly good electrical contact, in this embodiment, the contact element 3 is additionally provided with outwardly bent contact strips 36 at its two free ends. The contact strips 36 are the primary contact points with the running rail 2 and are preferably located in the front region of the end section 23. The stopper 612, integrated into the rear region of the plug 6, prevents the preassembled contact element 3 from falling out of the recess 611 during installation and prevents other guide elements, such as the body rail 1 or the intermediate rail 5, from coming into contact with the contact element 3.

[0076] Figures 11a-16c The contact element 3 shown in the exemplary embodiment can also be fixed to the plug 6 in other ways by material connection, form connection and / or force connection, or produced in a common production process, for example as an insert or by two-component injection molding.

[0077] The contact elements 3 described in these embodiments do not necessarily require the main rail 1 and running rail 2 of the pull-out guide to have the same construction and / or be fixed using the same process, but can be combined with each other. By selectively selecting the contact elements 3, it is possible to optimize heat generation in the pull-out guide or to adapt additional process steps to the pull-out guide manufacturing method.

[0078] Reference Signs List

[0079] 1 Main body track

[0080] 11 base

[0081] 12 Legs

[0082] 13 Front end section

[0083] 14 rear end section

[0084] 15 grooves

[0085] 2 running tracks

[0086] 21 base

[0087] 22 Legs

[0088] 23 Front end section

[0089] 24 rear end section

[0090] 25 grooves

[0091] 3 Contact elements

[0092] 31 base

[0093] 32 Legs

[0094] 33 tab

[0095] 34 solder joints

[0096] 35 contact surface

[0097] 36 contact pieces

[0098] 4 Stop element

[0099] 5 Middle Track

[0100] 6 plugs

[0101] 61 Insert

[0102] 611 Depression

[0103] 612 stopper

[0104] 62 Snap components

Claims

1. A pull-out guide mechanism for a household appliance with a microwave cooking function, comprising a body rail (1) and at least one running rail (2) movable relative to the body rail (1) for placing a food rack, wherein the body rail (1) and / or the running rail (2) have a U-shaped profile with a base (11, 21) and two legs (12, 22), characterized in that: In the end regions (14, 23) of the body rail (1) and / or the running rail (2), the legs (12, 22) are electrically connected to one another via contact elements (3), wherein the contact elements (3) are arranged at a distance from the base (11, 21).

2. The pull-out guide mechanism according to claim 1, wherein the body rail (1) and / or the running rail (2) are made of metal.

3. The pull-out guide according to claim 1 or 2, wherein the contact element (3) is made of a metal sheet or a metal wire.

4. The pull-out guide according to claim 1, wherein the contact element (3) is U-shaped and has a base (31) and two lateral legs (32).

5. The pull-out guide according to claim 4, wherein the contact element (3) is in contact with the legs (32) of the body rail (1) and / or the running rail (2) via its legs (32).

6. The pull-out guide according to claim 1, wherein the contact element (3) is in contact with the inner side of the leg (12, 22).

7. A pull-out guide mechanism according to any one of claims 1 to 6, wherein grooves (15, 25) are arranged in the legs (12, 22) of the body rail (1) and / or the running rail (2), and the contact element (3) is engaged in the grooves (15, 25) in a snap-fit manner.

8. A pull-out guide according to claims 4 and 7, wherein the contact element (3) has an outwardly flared latch (33) at the free end of its leg (32), and the contact element (3) engages in the groove (15, 25) via the latch (33).

9. The pull-out guide according to any one of claims 1 to 8, wherein the contact element (3) is welded to a leg (12, 22) of the body rail (1) and / or the running rail (2).

10. A pull-out guide mechanism according to any one of claims 1 to 9, wherein a plug (6) is inserted into the front end of the running rail (2) and / or the rear end of the body rail (1), wherein the contact element (3) is arranged on or in the plug (6).

11. A pull-out guide mechanism according to claim 10, wherein the plug (6) has an insert (61) which is fixed to the running rail (2) and / or the body rail (1) by clamping and / or snapping, wherein the contact element (3) is arranged on the insert (61) and / or at least partially in the insert (61).

12. The pull-out guide according to claim 11, wherein the insert body (61) of the plug (6) has at least one recess (611) which at least partially accommodates the contact element (3).

13. The pull-out guide according to any one of claims 10 to 12, wherein the plug (6) is made of an insulating material.

14. The pull-out guide according to any one of claims 10 to 13, wherein the plug (6) is made of a thermally insulating and / or shock-absorbing material.

15. A household appliance with a microwave cooking function, comprising at least one pull-out guide mechanism according to any one of claims 1 to 14, for accommodating a food rack.

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