EP3601889B1 - Pull-out guide and microwave oven or industrial heating oven with such a guide - Google Patents

Description

The invention relates to a pull-out guide for a microwave oven or an industrial heating oven, having a body rail and a running rail that can be moved relative thereto for storing a carrier, in particular a food carrier, as well as a microwave shielding for shielding the pull-out guide from microwaves, the running rail being only partially shielded. The invention also relates to a microwave oven or an industrial heating oven with such a pull-out guide.

In cooking appliances such as ovens, pull-out guides have become established with which a food carrier, for example a baking tray, can be conveniently pulled out of a cooking space of the appliance in order to then be able to remove it more easily or to be able to make a cooking sample without the risk of the Food carrier tilted.

In cooking appliances that heat or cook food exclusively or as an alternative to or in combination with other cooking methods using microwave radiation, all components arranged in the cooking space are subject to specific restrictions that are due to microwave radiation. It is important to prevent built-in components in the cooking space, including drawer runners, from absorbing energy from the microwave radiation and heating up as a result, or from dissipating the energy absorbed in an undesired manner. On the one hand, heating is undesirable from an energetic point of view and, on the other hand, it can damage the drawer runners or other components in the cooking space and even create a fire hazard. In addition, there is the risk of the formation of plasma discharges, which are also undesirable from an energetic point of view and also with regard to a destructive effect. A comparable problem arises with industrial heating ovens that use microwave radiation for heating purposes.

From the pamphlet DE 4142346 A1 a pull-out guide for a microwave oven is known in which the running rail of the pull-out guide is surrounded by a shielding rail with a closed hollow cross-sectional profile or in which the running rail itself is designed as a shielding rail. The actual pull-out guide is shielded by the shielding rail in such a way that the internal components of the pull-out guide are inaccessible to microwave radiation. The disadvantage of the design is that, due to the design with a closed hollow cross-sectional profile, direct support of the pull-out rail in the area in which the running rail moves is not possible. Accordingly, the pull-out rail can only be permanently installed in a rear end area and must be in a front area are guided, for example by a guide roller rotatably attached to a side wall of the cooking chamber. Such a guide role leads to an additional space requirement for the pull-out guide and does not allow a design as a full extension / over-extension. In addition, cleaning such an exposed guide roller turns out to be problematic.

From the pamphlet EP 0 407 742 A2 a pull-out guide for baking ovens or microwave ovens is known in which guide cages are arranged within a ball guide housing which is fixedly mounted in the cooking space, with cross-shaped guide rods being extendably guided in the guide cages. The ball guide housing has a longitudinal slot through which a support for a food support protrudes. For use in a microwave oven, a stationary one-part or multi-part protective wall with a chimney-shaped slot is provided, which separates and shields the pull-out guide from the cooking space.

The pamphlet DE 20 2009 013 663 U1 shows a pull-out guide for an oven, in which a downwardly open U-shaped cover is placed over the running rail. This protects in particular against dirt that could otherwise penetrate into a rolling element area of the pull-out guide. Reliable shielding against microwave radiation is not achieved.

It is therefore an object of the present invention to create a pull-out slide that can be used without additional external guide elements and without a fixed protective wall in a cooking space or heating space with microwave radiation. It is a further object to describe a microwave cooking appliance or an industrial heating oven with such a pull-out guide.

This object is achieved by a pull-out guide or a microwave oven or an industrial heating oven with the features of the respective independent claim. Advantageous refinements and developments are the subject of the dependent claims.

In the pull-out guide according to the invention of the type mentioned at the outset, the microwave shielding is designed in such a way that the running rail is only partially shielded.

The partial shielding can be achieved in that the shielding is only complete for the running rail in the retracted state of the running rail is, whereas in the extended or partially extended state there is no complete shielding of the running rail.

The partial shielding can alternatively or additionally also be achieved in that in the retracted and also in the partially or fully extended state the running rail is not completely encased geometrically along its sides, but only partially. The latter is based on the knowledge that incompleteness of the shielding is permissible under certain circumstances.

According to a first aspect of the invention, the microwave shielding is designed in at least two parts, a first part being fastened to the body rail and a second part being fastened to the running rail. In this way, a microwave shield can be formed which, in the retracted state of the pull-out guide, completely or partially surrounds the pull-out guide and thus shields critical areas of the pull-out guide from microwave radiation. The fact that this shielding is canceled by the two-part construction when the running rail is extended is not significant, since a door delimiting the interior space is opened and the microwave radiator is switched off when the running rail is extended. The fixing of the first part of the microwave shielding on the cabinet rail allows this part to be stationary, as a result of which it does not collide with a (likewise stationary) mounting element for the cabinet rail.

In one embodiment, the first part can be a first U-shaped profile rail with side legs and the second part can be a second U-shaped profile rail with side legs. The two U-shaped profile rails interlock and overlap with their legs at least in sections. In this way, a microwave-tight shield is formed in the retracted state.

The first and the second U-shaped profile rail can preferably be designed conically in their longitudinal direction. It is thus achieved that the profile rails in the retracted state can lie against one another in the overlapping area without any gaps, the legs of the profile rails moving away from one another when the running rail is extended. The extension of the running rail is thus not hindered by sections of the profile rails rubbing against one another.

In a further embodiment, the first part can have at least a first strip-shaped shielding plate and the second part can have at least a second strip-shaped shielding plate Be shielding plate. Both shielding plates are arranged on the side of the pull-out guide, at least in the retracted state of the pull-out guide, overlap along a respective longitudinal edge or rest against one another with the respective longitudinal edges.

The longitudinal edges preferably run obliquely in relation to a pull-out direction, which in turn enables closed shielding to be achieved when the pull-out guide is retracted, without the shielding plates rubbing against one another when the running rail is extended.

In an advantageous embodiment of the pull-out guide, the first part is a U-shaped profile rail with lateral legs, whereas the second part comprises a plurality of contact elements that contact the U-shaped profile rail in a contact area. The body rail works together with the U-shaped profile rail and the contact elements as a microwave shield, with the contact elements dividing any gap that may still remain between the body rail and the U-shaped profile rail into sections so short that the penetration of microwave radiation is prevented . The contact elements also ensure that the U-shaped profile rail and thus the running rail are at the same electrical potential as the cabinet rail at all times.

In a two-part embodiment of the microwave shielding, the contact elements can be attached to the body rail.

In this case, the contact area of the U-shaped profile rail can comprise a channel into which the contact elements protrude. According to a second aspect of the invention, the microwave shield is formed in one piece and attached to the running rail, the microwave shield being a U-shaped profile rail with side legs, the U-shaped profile rail having a plurality of contact elements that contact the body rail. In this case, the contact elements can each have a latching head that engages in latching openings in the U-shaped profile rail is used, and associated contact springs. In order to provide space for the contact elements, the side legs of the U-shaped Profile rails are inclined to each other so that the U-shaped profile rail expands downwards.

A microwave cooking device according to the invention or an industrial heating oven according to the invention has at least one such pull-out guide. This results in the advantages mentioned in connection with the pull-out slide.

Figuren 1a-c

ein erstes Ausführungsbeispiel einer erfindungsgemäßen Auszugsführung in verschiedenen Darstellungen;

Figuren 2a-c

ein zweites Ausführungsbeispiel einer erfindungsgemäßen Auszugsführung in verschiedenen Darstellungen;

Figuren 3a-c

ein drittes Ausführungsbeispiel einer erfindungsgemäßen Auszugsführung in verschiedenen Darstellungen;

Figuren 4a-c

ein viertes Ausführungsbeispiel einer erfindungsgemäßen Auszugsführung in verschiedenen Darstellungen; und

Figuren 5a-c

ein fünftes Ausführungsbeispiel einer nicht erfindungsgemäßer Auszugsführung in verschiedenen Darstellungen.

The invention is explained in more detail below on the basis of exemplary embodiments with the aid of figures. The figures show:

Figures 1a-c

a first embodiment of a pull-out slide according to the invention in various representations;

Figures 2a-c

a second embodiment of a pull-out guide according to the invention in various representations;

Figures 3a-c

a third embodiment of a pull-out slide according to the invention in various representations;

Figures 4a-c

a fourth embodiment of a pull-out slide according to the invention in various representations; and

Figures 5a-c

a fifth embodiment of a pull-out guide not according to the invention in various representations.

In the Figures 1a to 1c a first embodiment of a pull-out guide for a microwave oven is shown.

A microwave oven is to be understood as a microwave oven or a so-called combination oven which provides a thermal cooking function as an alternative or in addition to a microwave cooking function. As a rule, at least two such pull-out guides are used on the left and right in a cooking space at the same height in order to be able to place a food carrier, for example a baking tray or a grid, and to guide it horizontally out of the cooking space. If necessary, pull-out guides of this type can be placed one above the other in several levels be arranged. However, it is also conceivable to use a pull-out slide according to the invention in an industrial heating furnace, for example in the area of heating or crosslinking plastics.

The drawer slide is in the Figure 1a in an isometric exploded view and in the Figure 1b reproduced in an isometric view in the assembled state. Figure 1c shows a section perpendicular to the longitudinal extent of the pull-out rails, ie in a plane perpendicular to the pull-out direction.

The pull-out guide comprises a carcass rail 1 and a running rail 2, which is arranged above the carcass rail 1 and is guided displaceably with respect to this. As the Figure 1c shows, the pull-out guide is designed as a full extension runner and has a central rail 3 which is displaceable both with respect to the body rail 1 and with respect to the running rail 2. Body and running rails 1, 2 are each designed as a non-closed square profile that has a partially open side. These partially open sides of the profiles of the carcass rail 1 and the running rail 2 face one another, so that the central rail 3 can each extend into the interior of the carcass rail 1 and the running rail 2. The center rail 3 is guided displaceably in the body rail 1 and the running rail 2 via at least one rolling element cage 4, in which a plurality of rolling elements 5 are held.

The food carrier is placed on the upper of the rails, the running rail 2. In order to secure the food carrier against shifting, a bolt 6 protruding vertically upward is connected to the running rail 2 and delimits the running rail 2 towards the rear (as seen in the extension direction). The food carrier can rest against this bolt 6, or the bolt 6 can be guided through a corresponding bore or an opening in the food carrier. On the front side, the pull-out guide is covered by front covers 7, each of the front covers 7 being connected to one of the running rails 1, 2. The rear, in the Figures 1a and 1b The end cover 7 adjacent to the bolt 6 is connected to the body rail 1 and the front end cover 7 is connected to the running rail 2.

According to the invention, a microwave shield 10 is provided which, in the first exemplary embodiment shown, comprises two interlocking U-shaped profile rails. A first (lower) U-shaped profile rail 11 is included connected to the body rail 1 and is thus arranged in a stationary manner in the cooking space. A second (upper) U-shaped profile rail 12 is placed over the running rail 2 and connected to it, for example again by spot welding. For this purpose, the upper profile rail 12 has an opening 122 through which the bolt 6 protrudes upwards.

Lateral legs 121 of the upper U-shaped profile rail 12 are spaced further apart than corresponding legs 111 of the lower profile rail 11, so that the upper profile rail 12 overlaps the lower profile rail 11 laterally. The legs 111, 121 of the lower or upper profile rail 11, 12 can be slightly spaced from one another or can rest against one another without gaps or almost without gaps, as shown in FIG Figure 1c is represented symbolically.

The two interlocking U-shaped profile rails 11, 12 enclose the body and running rails 1, 2 of the pull-out guide in a microwave-tight manner when the pull-out guide is fully retracted. Microwaves can therefore not reach the smaller components of the pull-out guide, which may act as antennas, e.g. the rolling elements 5, so that when the running rail 2 is in the retracted state, the pull-out guide shown is suitable for use in microwaves.

Despite the complete enclosure of the pull-out guide in the retracted state, the lower side of the cabinet rail 1 is directly or indirectly accessible for assembly elements, e.g. assembly brackets, so that it can be assembled in the cooking space.

Advantageously, as in the case shown, the U-shaped profile rails 11, 12 are conical in the longitudinal direction, ie the width (the distance between the two side legs) becomes narrower from the rear to the front in the extension direction. Like in the Figure 1a is shown, a width of the lower profile 11 tapers from a value B ₁₁ to a value b ₁₁ , wherein for the widths B ₁₁ > b ₁₁ applies. In the same way, the upper U-shaped profile rail 12 tapers in its width from a value B ₁₂ in the extension direction up to a value b ₁₂ , it again being the case that B ₁₂ > b ₁₂ . As stated above, the upper U-shaped profile rail overlaps the lower U-shaped profile rail at every point, so that it also applies that B ₁₂ > B ₁₁ and b ₁₂ > b ₁₁ .

The conical design of the two U-shaped profile rails 11, 12 has the consequence that the legs 111, 121 touch each other when the pull-out guide is fully retracted, whereas they are increasingly spaced from one another when the pull-out guide is extended. In this way, in the retracted state of the pull-out guide, a completely sealed microwave shielding 10 is formed, which nevertheless does not prevent the pull-out guide from opening as easily and as smoothly as possible.

In the Figures 2a to 2c , 3a to 3c , 4a to 4c and 5a to 5c a further embodiment of a pull-out guide according to the application is shown in each case. In all the exemplary embodiments, the same reference symbols denote elements that are the same or have the same effect as in the examples of FIG Figures 1a to 1c .

Furthermore, in all the exemplary embodiments in the figure with the addition "a" the pull-out guide is shown in an isometric exploded view, in the figure with the addition "b" in an assembled state in an isometric view and in the figure with the addition "c" in a sectional view.

With regard to the basic structure, the pull-out guide is formed in all cases in the same way as in the exemplary embodiment in FIG Figures 1a to 1c , the description of which is hereby explicitly referred to.

In particular, the pull-out guide has a fixed body rail 1 and a running rail 2 mounted so as to be displaceable relative to it. At least one middle rail 3 can be arranged between the body rail 1 and the running rail 2, each of which is slidably mounted in the body rail 1 or the running rail 2 via rolling bodies 5 which are positioned in a rolling body cage 4. However, an arrangement without a central rail (partial extension) is also conceivable. An optional bolt 6 is arranged on the running rail 2 in each case, which is used to fix an applied food support. Optional end covers 7 are provided on the end face, but these are not shown in all drawings.

In each exemplary embodiment shown, a microwave shield 10 is present, which, however, differs from one another in the individual exemplary embodiments. The configuration of the microwave shield 10 is described in more detail below for each exemplary embodiment.

In the embodiment of Figures 2a to 2c The microwave shielding 10 comprises two shielding plates 13, 14, of which a first (lower) shielding plate 13 is connected to the body rail 1 and a second (upper) shielding plate 14 is connected to the running rail 2. Both shielding plates 13, 14 extend over the entire length of the Drawer slide. With their side edges 131 and 141 facing one another, the two shielding plates 13, 14 rest against one another when the pull-out guide is fully retracted. A gap between the two rails of the pull-out guide, that is, the body rail 1 and the running rail 2, is completely or at least partially closed by a relatively flat arrangement of the two shielding plates 13, 14, so that no microwaves can penetrate.

The two mutually facing edges 131, 141 of the shielding plates 13, 14 are designed to be inclined, so that when the running rail 2 is extended, these edges 131, 141 do not rub against each other, but rather are spaced apart from each other. The longitudinal edges 131, 141 can also be designed as a profiled or semicircular profiled edge for better contacting.
Again, similar to the embodiment of FIG Figures 1a to 1c thus a shield is formed which on the one hand is closed and on the other hand does not hinder an extension of the pull-out guide.

A comparable arrangement of shielding plates 13, 14 could in principle also be arranged on the opposite side of the pull-out guide in order to also close the gap formed there between the body rail 1 and the running rail 2 when the pull-out guide is retracted. However, since this side of the pull-out guide is often positioned relatively close to the metal side wall of the cooking space, the penetration of microwaves into this gap is already prevented by the shielding effect of the side wall. Therefore, provided that the pull-out rail is installed appropriately in the cooking space of the cooking appliance, shielding can be dispensed with on this side.

In the embodiment of Figures 3a to 3c the microwave shield 10 has only one U-shaped profile rail 15, which extends over the entire length in the retracted state of the pull-out guide and which is placed on the running rail 2 from above and fastened to it. At both free ends of legs 151 of the U-shaped profile rail 15 are inwardly Open channels 153 formed, which in turn have a U-shaped cross section.

In these open channels 153 or on the body rail 1, a plurality of contact elements 8 are preferably attached laterally at regular intervals, which in the assembled state of the pull-out guide, which is in the Figures 3b and 3c are positioned in the side channels 153. The contact elements 8 serve as guide elements and contact the U-shaped profile rail 15 with the body rail 1 in the retracted state of the pull-out guide at intervals of one to a few centimeters.

In the embodiment shown, the contact elements 8 are rolling bodies which are rotatably supported in the open channels 153 and roll on the body rail. In an alternative embodiment, the contact elements 8 can also be contact springs which are arranged either in the channels 153 or on the carcass rail 1 and which contact the other of these elements with sliding contact when the running rail 2 is moved. A combination of resilient, sliding and / or rolling contact elements can also be used.

The contact elements can have an electrically conductive material, in particular a metal and / or graphite and / or an electrically conductive plastic. Preferred metals are copper, brass or bronze because of their good conductivity. As electrically conductive materials, for example, polyketone (POK), polypropylene (PP), thermoplastic polyurethane (TPU) and / or polyetheretherketone (PEEK) can be used, which is made electrically conductive by appropriate additives, usually carbon particles such as carbon black.

The contact elements can consist entirely or partially of the materials mentioned. It is also possible that a core, which can consist of an electrically conductive or also a non-conductive material, is surrounded by an electrically conductive and flexible material. The electrically conductive and flexible material is, for example, a knitted or knitted fabric made of conductive threads or comprises conductive brushes or bristles.

The contact elements can be designed in such a way that they hold the pull-out guide in a retracted position by frictional and / or positive locking. The contact elements make it advantageous for microwave ovens frequently desired interlocking function, also called guard interlocking, also implemented. This serves, for example, to maintain a distance between, for example, the door of the microwave oven and the front face cover, which additionally prevents (spark) breakdowns between these elements. In alternative configurations, however, it is also possible to implement the guard locking using separate components.

The carcass rail 1 works together with the U-shaped profile rail 15 and the contact elements 8 as microwave shielding 10, with the contact elements 8 dividing any gap that may still remain between the carcass rail 1 and the U-shaped profile rail 15 into such short sections that a Penetration of microwave radiation is prevented. The contact elements 8 also ensure that the U-shaped profile rail 15 and thus the running rail 2 are at the same electrical potential as the body rail 1 at all times. Discharges between carcass rail 1 and running rail 2 are therefore excluded. With regard to DC voltage, there is already a local equipotential bonding between the body rail 1 and the running rail 2 due to the usually metallic rolling elements 5 and the likewise metallic middle rail 3, assuming ideal contact. However, since the rolling element cages 4 do not extend over the entire length of the pull-out guide, potential equalization via the rolling elements 5 alone is not guaranteed with regard to high-frequency excitation.

In the Figures 4a-4c a further embodiment of a pull-out guide according to the invention is shown, in which a similar basic principle is implemented as in the embodiment of FIG Figures 3a-3c . Again, a U-shaped profile rail 16 is placed on the running rail 2, which contact elements make contact with the body rail 1 at a plurality of contact points which are preferably regularly distributed over the length of the pull-out guide.

The U-shaped profile rail 16 is widened in this exemplary embodiment, that is to say has legs 161 that are flared downwards and outwards. A plurality of latching openings 163, into which contact elements 17 are inserted, are arranged along a lower edge of the legs 161. The contact elements 17 have a latching head 171 which latches into two adjacent latching openings 163 of the U-shaped profile rail 16. Inwardly protruding contact springs 172, which contact the body rail 1, then protrude from the latching head 171.

Compared to an embodiment in which the contact elements 8 are mounted on the body rail 1, in the present example a commercially available pull-out guide can serve as the basis for the pull-out guide shown, on which the U-shaped profile rail 16 is placed and connected to the running rail 2. A modification to the cabinet rail 1 is not absolutely necessary.

Both in the Figures 3a-3c and 4a-4c In the illustrated embodiments that implement this basic principle, the lower side of the carcass rail 1 is freely accessible and can thus be used to assemble the pull-out guide, for example directly with the aid of mounting brackets.

Also the embodiment of FIG Figures 5a-5c shows a microwave shielding 10, which has only one profile rail, which here bears the reference numeral 18. The profile rail 18 has an essentially rectangular profile which surrounds the body rail 1 and the running rail 2.

A slot 181, which extends over the entire length of the profile rail 18 and has a height of a few millimeters, is recessed on one of the sides.

When the pull-out guide is arranged in the cooking space of a microwave device, the slotted side of the profile rail 18 preferably points towards the side wall of the cooking space. The profile rail 18 is preferably as close as possible, for example at a distance of a few millimeters from this side wall. As already in connection with the embodiment of Figures 2a-2c has been explained, penetration of microwave radiation into a slot 181 positioned in this way is excluded or a possibly penetrating portion of the radiation has a lower intensity. The slot 181 in turn advantageously enables the use of mounting elements, for example mounting brackets, for the carcass rail, since the carcass rail 1 is accessible from the outside through the slot.

In the illustrated exemplary embodiments, in a further development, the front cover 7 can be coated or covered with an electrically non-conductive material, for example a ceramic material. This electrically non-conductive material serves as a spacer between the running rail 2 and a rear wall of the cooking space and / or a door of the microwave oven. Even if there are high electrical potentials on the pull-out slide and / or build up of the door, sparks are avoided in this way. Said tumbler can also serve to maintain a distance between, for example, the door of the microwave oven and the front end cover 7, thereby preventing (spark) breakdowns. Non-conductive spacer elements on one of the end covers 7 can also be applied to the rear of the end covers 7. They then serve as spacers between the relevant front cover 7 and the respective other rail of the pull-out guide in order to prevent a (spark) breakdown at this point when the pull-out guide is retracted.

List of reference symbols

1

Cabinet rail

2

Running track

3

Middle rail

4th

Rolling element cage

5

Rolling elements

6th

bolt

7th

Forehead cover

8th

Contact element

10

shielding

11

first U-shaped profile rail

111

leg

12th

second U-shaped profile rail

121

leg

122

breakthrough

13th

first shielding plate

131

sloping edge

14th

second shielding plate

141

sloping edge

15th

U-shaped profile rail

151

leg

152

breakthrough

153

channel

16

U-shaped profile rail

161

leg

162

breakthrough

163

Locking opening

17th

Contact element

171

Locking head

172

Contact spring

18th

U-shaped profile rail

181

slot

182

breakthrough

Claims (12)

1. Pull-out guide for a microwave cooking appliance or an industrial furnace, comprising a body rail (1) and a running rail (2), movable relative thereto, for depositing a support, and a microwave shield (10) for shielding the pull-out guide against microwaves, wherein the running rail (2) is only partially shielded, and wherein the microwave shield (10) is formed in at least two parts, characterized in that a first part is attached to the body rail (1) and a second part is attached to the running rail (2).
2. Pull-out guide according to claim 1, in which the first part is a first U-shaped profile rail (11) with lateral legs (111) and the second part is a second U-shaped profile rail (12) with lateral legs (121), which profile rails engage in one another and at least in some sections overlap one another laterally with their legs (111, 121).
3. Pull-out guide according to claim 2, in which the first U-shaped profile rail (11) and the second U-shaped profile rail (12) are tapered in their longitudinal direction.
4. Pull-out guide according to claim 1, in which the first part is at least a first strip-shaped shielding plate (13) and the second part is at least a second strip-shaped shielding plate (14), which shielding plates are arranged laterally on the pull-out guide and, at least in the retracted state of the pull-out guide, overlap one another or bear against one another along a respective longitudinal edge (131, 141).
5. Pull-out guide according to claim 4, in which the longitudinal edges (131, 141) run in a sloping manner with respect to a pull-out direction.
6. Pull-out guide according to claim 1, in which the first part is a U-shaped profile rail (15) with lateral legs (151) and the second part comprises a plurality of contact elements (8) that make contact with the U-shaped profile rail (15) in a contact area.
7. Pull-out guide according to claim 6, in which the contact elements (8) are attached to the body rail (1) and/or to the U-shaped profile rail (15).
8. Pull-out guide according to claim 6 or 7, in which the contact area comprises a channel (153), into which the contact elements protrude.
9. Pull-out guide for a microwave cooking appliance or an industrial furnace, comprising a body rail (1) and a running rail (2), movable relative thereto, for depositing a support, and a microwave shield (10) for shielding the pull-out guide against microwaves, wherein the running rail (2) is only partially shielded, wherein the microwave shield (10) is formed in one piece and is attached to the running rail (2), and wherein the microwave shield (10) is a U-shaped profile rail (16) with lateral legs (161), characterized in that the U-shaped profile rail (16) has a plurality of contact elements (17) that make contact with the body rail (1).
10. Pull-out guide according to claim 9, in which the contact elements (17) each have a latching head (171), which is inserted in latching openings (163) of the U-shaped profile rail (16), and contact springs (172) connected thereto.
11. Pull-out guide according to claim 9 or 10, in which the lateral legs (161) of the U-shaped profile rail (16) are inclined relative to one another.
12. Microwave cooking appliance or industrial furnace having at least one pull-out guide according to one of claims 1 to 11.

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