Mounting and securing system for a cooking appliance, cooking appliance and securing method

Abstract

The invention relates to a mounting (2) for securing a functional unit (60), in particular a pan-shaped cooking vapor evacuation element, to the inner face (28) of a wall (12) of a cooking appliance (4), in particular an oven ceiling, comprising a first securing means (6), in particular a nut (8), to which a second securing means (40), in particular a screw (42), of the functional unit (60) can be secured and which can be guided through a passage (10) in the wall (12), in particular from the inside to the outside; and a force distribution means (14) which is designed to distribute forces over a large area of the wall (12), can be positioned on the outer face (24) of the wall (12) and can be connected to the first securing means (6), in particular without tools, preferably by means of a rotary catch or bayonet lock, and by means of which the first securing means (6) can be fixed in the passage (10), in particular the securing means can be spring-elastically pretensioned against the inner face (28) of the wall (12). The invention also relates to a securing system, to a cooking appliance (4) and to a method for securing a functional unit.

Description

[0001] Bracket and fastening system for a cooking appliance, cooking appliance and fastening method

[0002] Description

[0003] Technical area

[0004] The present disclosure relates to a holder for fastening a functional unit, in particular a vapor extraction unit, to an inner side of a wall of a cooking appliance, in particular an oven ceiling, a fastening system with the holder, a cooking appliance, in particular an oven, with the fastening system and a method for fastening the functional unit by means of the fastening system.

[0005] State of the art

[0006] Functional units with catalysts or filters are used in many cooking appliances to purify gases emitted from the cooking chamber. For this to happen, the functional unit must be permeated by the emitted gases. This can be achieved by positioning the functional unit on the wall of the cooking appliance near a gas passage. This area is weakened in strength due to the recesses in the wall for the gas passage, and assembly forces must be distributed to the edge area outside the gas passage. Furthermore, the functional unit should be easy to install, allowing the customer to replace the catalyst or filter unit.

[0007] Cooking appliances with a functional unit on the wall are already known from the prior art. For example, DE 198 182 89 A1 discloses a cooking appliance with a mounting part above and a filter housing below the muffle wall, wherein the filter housing is held on the mounting part. A cover of the filter housing is screwed to the mounting part and a filter bowl with filter is locked to the filter cover. The muffle wall is therefore not subjected to any stress from the screw connection. Mounting tabs are provided to fix the filter cover to the muffle wall, but these still lead to a local stress concentration on the muffle wall at their contact surfaces. Systems are also known from the prior art in which an inverted bowl with an open bottom is fastened to the outside of the wall, to which the functional unit positioned on the inside of the wall is screwed.This distributes the load resulting from the screw connection to the more stable edge area around the perforated area. However, this solution requires multiple screw systems, which create a local load concentration, as well as threads in the otherwise enameled wall of the cooking appliance. This conflicts with a corrosion-resistant design and the uniform force distribution required when using brittle coatings such as enamel. A multi-screw construction also carries the risk of static overdetermination, which must be avoided due to thermal expansion between ambient and operating temperatures.

[0008] The object of the present invention is therefore to eliminate or at least reduce the disadvantages of the prior art. Specifically, the object of the present invention is to design an interface in sensitive areas of the oven ceiling that, in addition to distributing the assembly forces to the edge area outside the gas passage, enables a uniform, flat application of force. This prevents local load concentration, prevents or at least reduces bending stress in the wall, and prevents or at least reduces static overdetermination, thereby enabling easy assembly of the functional unit.

[0009] Summary of Revelation

[0010] This object is achieved by a holder for fastening a functional unit according to claim 1. Advantageous developments of the invention are disclosed in the subclaims and / or described below.

[0011] Specifically, the problem is solved by a holder with a first fastening means, to which a second fastening means, a functional unit, can be fastened and which can be passed through a passage in a wall of a cooking appliance, and a force distribution means for distributing forces across a large area on the wall. The force distribution means can be arranged on an outer side of the wall and coupled to the first fastening means. The first fastening means can be secured in the passage via the force distribution means.

[0012] The first fastening means can have a section to which the second fastening means can be fastened, a section that can be passed through a passage in the wall of the cooking appliance, in particular from the inside to the outside, and a section to which the force distribution means can be fastened. The force distribution means can be coupled to the first fastening means without tools, preferably by means of a rotary latch or bayonet lock. The force distribution means and the first fastening means can be designed such that, in the coupled state, the force distribution means are resiliently prestressed against the outside of the wall and the first fastening means are resiliently prestressed against the inside of the wall. The force distribution means is preferably resiliently designed.

[0013] The first fastener may be a nut and the second fastener may be a screw.

[0014] The force distribution means is provided and designed to distribute introduced forces across a large area of ​​the wall via a support surface. These forces include, among other things, assembly and weight forces of the functional unit, i.e., primarily tensile forces in the axial direction of the first fastening means, i.e., perpendicular to the wall toward the inside of the cooking appliance. The core of the invention is to position a first fastening means with a receptacle for a second fastening means in a passage in the wall of a cooking chamber using a connectable force distribution means, wherein introduced forces are distributed across the wall across a large area by the force distribution means.

[0015] The holder according to the invention sandwiches the wall between the force distribution means and the first fastening means and rests only on the outside or inside of the wall, possibly with a spring-elastic preload. This means that the force distribution means and the first fastening means are not connected to the wall, but only to each other, which is why the wall surface is not damaged or penetrated, with the exception of the passage for the first fastening means, for which, however, an existing vapor vent or other passage can be used.

[0016] By combining the primary fastening element and the force distribution element in this way, local load concentrations on the wall can be avoided. Furthermore, multi-part screw systems can be dispensed with in favor of a two-part design. Internal stresses due to thermal expansion can thus be avoided. The bracket can also be easily assembled and disassembled.

[0017] In one aspect, the force distribution means can be cup-shaped, plate-shaped, star-shaped, or wheel-shaped and have a central coupling section for coupling the first fastening means and one or more support sections, e.g., a ring-shaped or ring-segment-shaped support section, for supporting the outer side of the wall. The support section(s) are radially spaced from the central coupling section such that they span or surround material weakenings in the wall, in particular vapor vents. The support sections can be connected to the central coupling section via radial webs.

[0018] Between the central coupling section and the at least one support section, the force distribution means can have one or more recesses or openings. These can serve to allow the vapor to pass through, allowing the vapor to be guided through the force distribution means.

[0019] The recesses in the force distribution means can be adapted in position and / or size and / or shape to the vapor passages in the wall.

[0020] The force distribution means can also be star-shaped. Several recesses can be evenly spaced circumferentially and divided by one or more radially extending webs. The force distribution means can also be wheel-shaped (with a circumferential support section) or spider-shaped (with a plurality of support sections spaced circumferentially). This design allows the applied force to be distributed to the more stable edge area around the vapor vents or material weakenings. The support section also enables a large-area load distribution.

[0021] In a further aspect, the at least one support section can be connected to the central coupling section via at least one radial strut which spans the material weakenings in the wall.

[0022] This design allows the strut to serve as a bending beam and create a spring effect. This can generate elastic prestressing. The free cross-section can be used to allow vapor to pass through.

[0023] The force distribution means can also be concave or have curved radial struts to allow spring-elastic deformation.

[0024] In a further aspect, the central coupling section can have a central recess and a locking geometry. The locking geometry can be a rising ramp geometry arranged outside the central recess and extending in the circumferential direction, with an adjoining locking recess and an adjoining rotation limiting stop. The first fastening means can have a locking head with a locking geometry, in particular locking lugs. The locking head can be passed through the central recess and can be brought into releasable locking or locking engagement with the locking geometry on the central coupling section of the force distribution means by relative rotation of the first fastening means and the force distribution means.

[0025] The locking geometry of the central coupling section can comprise a plane whose surface normal is tilted relative to the central axis, i.e., it can comprise a rising surface that can resemble a ramp geometry. The rising surface or ramp geometry can extend circumferentially around the central recess.

[0026] The locking geometry can also have a locking recess, i.e., a surface that follows the rising surface or ramp geometry and represents a recess relative to the adjacent section of the rising surface or ramp geometry. The rising surface or ramp geometry thus forms a locally higher point than the locking recess.

[0027] The locking geometry can further include a rotation limit stop, i.e., a stop that adjoins and limits the locking recess. During the manufacture of the force distribution device, the stop can be formed by cutting or tearing the material.

[0028] The first fastening means has a locking head. The locking head of the first fastening means can have one or more locking lugs. The locking head is provided and designed to be passable through the central recess of the force distribution means. By rotating the first fastening means and the force distribution means relative to each other, the locking head can engage in a releasable locking or latching engagement with the locking geometry on the central coupling section of the force distribution means.

[0029] Preferably, the contact of the locking lug with the rotation limit stop during the relative rotation of the first fastening means and force distribution means only occurs after the locking lug has left the rising surface or ramp geometry and rests on the locking recess.

[0030] Such a design allows coupling and locking of the first fastening means with the force distribution means. By shifting the locking geometry of the locking head along the ramp geometry upon rotation of the force distribution means relative to the first fastening means, a preload of the force distribution means can be generated, which is elastically absorbed by the force distribution means. Preferably, the locking geometries themselves are not deformed in the process.

[0031] The locking recess can prevent the coupling from becoming loose. Overtightening of the first fastening means during coupling with the force distribution means can be prevented by limiting the rotational movement due to the contact between the locking geometry, in particular the locking lugs, and the rotation limiting stop. In a further aspect, the first fastening means can have a circumferential section adapted to the geometry of the passage in the wall, in particular a non-rotationally symmetrical or polygonal section, in order to, on the one hand, prevent relative rotation of the first fastening means to the wall and, on the other hand, to enable axial movement in the passage.

[0032] Such a design eliminates the need for additional rotational fixation of the first fastening element when coupling the force distribution element to the first fastening element. A counter-torque for the coupling process can be applied to the wall, which is simplified due to its expansion.

[0033] The object of the present invention is further achieved by a fastening system according to a subordinate claim, comprising a holder according to one of the above aspects and a functional unit. The functional unit has a receiving section, e.g., for receiving a catalyst and / or filter, and the second fastening means, in particular the screw, for fastening the functional unit to the first fastening means.

[0034] The functional unit can be a catalyst or filter unit. This can be designed, in particular, as a vapor trap unit. The receiving section can preferably be designed as a vapor trap. The second fastening means, which can be designed as a screw, enables the functional unit to be fixed to the first fastening means or the holder.

[0035] Preferably, the second fastening means is a central screw whose screw head is provided with a knurled surface. Such a design allows the torque acting on the second fastening means to be limited when fastening the functional unit.

[0036] In one aspect, the receiving section can be pot-shaped and have a central coupling section with a central recess for receiving the second fastening means and at least one ring- or ring-segment-shaped support section for resting on the inside of the wall. The radial distance of the at least one ring- or ring-segment-shaped support section of the functional unit preferably corresponds to the radial distance of the at least one ring- or ring-segment-shaped support section of the holder, so that in the fastened state (with the wall interposed), they lie opposite one another. In this way, the forces acting on the wall, on the one hand from the (ring-shaped) support section of the force distribution means of the holder and on the other hand from the (ring-shaped) support section of the functional unit, cancel each other out. Thus, no bending moments act on the wall.

[0037] In a further aspect, the first fastening means and / or the second fastening means can be provided with a stop which limits the forces acting on the force distribution means of the holder and the receiving section of the functional unit during mutual connection.

[0038] In other words, at least one shoulder can be formed to limit the insertion depth / screw-in depth. This can be formed on the first fastening element, the second fastening element, or both.

[0039] Such a design allows for the limitation of forces that arise between the first fastening element and the second fastening element, and thus act on the force distribution element, the wall, and the functional unit. Furthermore, deformation of the force distribution element and the functional unit can be limited.

[0040] If one (first) fastener is a nut and the other (second) fastener is a screw, the screw may have a thinner shoulder in extension of the external thread, which may protrude into the core hole of the internal thread of the nut.

[0041] The object of the present invention is further achieved by a cooking appliance, according to a further independent claim, with a fastening system according to one of the above aspects, which is fastened in the region of a weakened area of ​​a wall of the cooking chamber. The functional unit and the holder clamp the wall of the cooking chamber between them with their support sections surrounding this area, completely relieving the weakened area.

[0042] The cooking appliance can be designed as an oven. The weakening of the wall can be caused by vapor vents. These can allow vapor to escape from the cooking appliance. The fastening system comprises a functional unit and a bracket. The functional unit is attached to the bracket, with the wall clamped between them. This completely relieves the weakened area. The clamping takes place between the support sections of the functional unit and the bracket.

[0043] This type of design allows for complete relief of the cooking chamber wall in its normal direction. Furthermore, sandblasted areas are not required for cooking appliances with a microwave function, as microwave safety is achieved by pre-tensioning the force distribution element on the wall. A large-area support section for the force distribution element and the functional unit can also prevent point loads and is gentle on the surface. If the support sections of the force distribution element and the functional unit have the same diameter, clamping loads may occur in the wall. The wall can also be fully enameled in the area of ​​the functional unit, as only the rotational movement of the nut is transmitted. This allows for an unlimited service life compared to a cooking appliance without an internal functional unit.Furthermore, the reduction in components reduces the assembly time of the cooking appliance according to the invention and lowers its costs.

[0044] Embodiments are also conceivable in which, when attaching the second fastening means, contact between the first fastening means and the inside of the wall is removed by translating the first fastening means towards the inside of the cooking appliance. As a result, the load introduced by the force distribution means onto the wall in the normal direction of the wall is transferred via the force connection between the force distribution means, the first fastening means, the second fastening means and the functional unit. The wall is then only clamped between the force distribution means and the functional unit, which represents a local ring load, since the diameters of the force distribution means and the functional unit are comparable. This means that the weakened area in the wall is not loaded in the normal direction of the wall. The coupling point between the bracket and the functional unit, i.e.The connection point between the two fastening elements can be mounted in a floating manner in the passage.

[0045] In other words, the length of the second fastening means is adapted to the geometry of the first fastening means, the force distribution means, the wall and the functional unit in such a way that the maximum insertion depth / screw-in depth of the second fastening means is reached when the contact of the first fastening means with the inside of the wall is eliminated and the polygonal outer contour of the first fastening means is positioned in the passage of the wall in a rotationally secure manner.

[0046] The object of the present invention is further achieved by a method according to a further independent claim for fastening a functional unit, in particular a vapor pot unit, to an inner side of a wall of a cooking appliance, in particular an oven ceiling, by means of a fastening system according to one of the above aspects with the step sequence:

[0047] - Passing the first fastener through the hole in the wall;

[0048] - positioning the force distribution means of the holder on an outer side of the wall so that a locking element of the first fastening means penetrates a central coupling portion of the force distribution means;

[0049] - Rotating the force distribution means relative to the first fastening means or vice versa until the locking geometry of the force distribution means and the locking geometry of the first fastening means lock together;

[0050] - positioning the functional unit on the inside of the wall so that the central coupling section of the functional unit and the central coupling section of the first fastening means are aligned with each other; and

[0051] - Fix the functional unit to the bracket using the second fastening device.

[0052] In other words, the problem is further solved by the method for fastening the functional unit by means of the fastening system.

[0053] The method includes a first step in which the first fastening element is inserted into the passage in the wall from the inside of the cooking appliance outward, i.e., in the direction of vapor flow, until it rests against the wall. Until coupling with the force distribution element, it may be necessary to actively hold / position the first fastening element in the passage.

[0054] In a second step, the force distribution means is positioned on the outer side of the wall, wherein the longitudinal axis of the first fastening means coincides with the central axis of the force distribution means, and the force distribution means is rotated relative to the first fastening means about the central axis such that the locking element of the first fastening means penetrates or can penetrate the central coupling section of the force distribution means. For this purpose, pre-tensioning the force distribution means in the direction of the first fastening means or the wall may be necessary.

[0055] In a third step, the force distribution element is rotated relative to the first fastening element. The locking geometry of the first fastening element can slide on the locking geometry of the force distribution element until they engage.

[0056] In some embodiments, the force distribution means can first be clamped against the first fastening means and then partially released. In some embodiments, the rotation limit stop can prevent overtightening of the locking geometries.

[0057] In a fourth step, the functional unit is positioned on the inside of the wall such that the coupling sections of the functional unit and the first fastening means are aligned. In some embodiments, the annular support sections can rest opposite one another on the wall.

[0058] In a fifth step, the second fastening means, which is passed through the central coupling section of the functional unit, is fixed to the bracket.

[0059] This allows the functional unit to be pressed against the wall and thus secured. Brief description of the figures

[0060] Fig. 1 is a sectional view of a fastening system of a cooking appliance according to the invention;

[0061] Fig. 2 an enlargement of area II from Fig. 1

[0062] Fig. 3 is a perspective view of the cooking appliance fastening system according to the invention in an unlocked state;

[0063] Fig. 4 is a perspective view of the cooking appliance fastening system according to the invention in a locked state;

[0064] Fig. 5 shows a schematic view of the cooking appliance;

[0065] Description of the embodiments

[0066] Hereinafter, embodiments of the present disclosure will be described based on the accompanying figures.

[0067] Fig. 1 shows a holder 2 according to the invention for a cooking appliance 4 with a first fastening means 6, in particular a nut 8, which is positioned in a passage 10 of a wall 12 of the cooking appliance 4 and to whose distal / outside end a force distribution means 14 is fastened, or more precisely, locked. The first fastening means 6 and the force distribution means 14 together form the holder 2.

[0068] The force distribution means 14 is cup-shaped and comprises a central coupling section 16 for coupling the nut 8. Radially outside the central coupling section 16 is a spring section 18 with radial struts 20 and a first support section 22, which forms the edge of the force distribution means 14. This rests on an outer side 24 of the wall 12 of the cooking appliance 4 in a ring shape around an area with vapor openings 26. Opposite the annular first support section 22 of the force distribution means 14, on an inner side 28 of the wall 12, a second support section 30 is supported, which forms the edge of a receiving section 32, in particular a vapor cup 34. The vapor cup 34 is cup-shaped. In its side wall, a circumferential support shoulder 36 is formed, on which a catalyst / filter 38 rests.The vapor pot 34 is positioned on the wall 12 by means of a second fastening means 40, in particular a screw 42, which is screwed to the proximal / cooking appliance-side end of the nut 8. For this purpose, a second coupling section 46 with a second central recess 48 for coupling the screw 42 is formed in the center of the base 44 of the vapor pot 34.

[0069] The screw 42 has a collar 50 on which the second central recess 48 rests, as well as a knurling surface 52 on the proximal / cooker-internal end of the screw 42, which is radially enlarged compared to the collar 50. The catalyst / filter 38 has a third central recess 54, the diameter of which corresponds to the diameter of the shaft 56 of the screw 42.

[0070] At the bottom 44 of the vapor collector 34, a plurality of vapor collector through-holes 58 are formed radially around the second central recess 48. The vapor collector 34, together with the catalyst / filter 38 and the second fastening means 40, forms the functional unit 60. The nut 8 defines a longitudinal axis 62, which, in the illustrated state, coincides with the central axis 64 of the force distribution means 14.

[0071] Fig. 2 shows an enlargement of area II of the sectional view from Fig. 1, wherein the nut 8 includes a bayonet section 66 with a locking head 68 with a locking geometry 70, which has two locking lugs 72 that extend radially outwards from a side surface 74 and represents one half of a bayonet lock 76. In the direction of the catalytic converter / filter 38, the bayonet section 66 is adjoined by a central section 78 that has a multi-edged peripheral section 80, i.e. a multi-edged outer contour 82. The minimum radial extent R2, i.e. the minimum distance of the surface of the outer contour 82 from the longitudinal axis 62, corresponds to half the wrench size of the central section 78. A step 88 is adjoined by a rounded portion 84 in the direction of the catalytic converter / filter 38. The maximum radial extension R3 of the shoulder 88 is greater than the minimum radial extension R2 of the outer contour 82.

[0072] A coupling section 86 of the nut 8 has a blind hole 90 with an internal thread 92 along the longitudinal axis 62. The bore bottom 94 of the blind hole 90 serves as a stop 96 for the distal screw end 98.

[0073] The side surface 100 of the shoulder 88 rests against the wall 12. The wall 12 is curved in the region of the passage 10 in the direction of the force distribution means 14, wherein the inner contour of the passage 10, enlarged in the viewing direction of the longitudinal axis 62, forms the outer contour 82 of the central section 78.

[0074] Figs. 3 and 4 show a perspective view of the area with vapor vents 26 of the cooking appliance 4 with the nut 8 in a first central recess 102 with a locking geometry 104 in the central coupling section 16 of the force distribution means 14, which is fixed above the wall 12, the catalytic converter / filter 38, and the vapor pot 34. Two opposing ramp geometries 106 are formed in the central coupling section 16, each of which is adjoined in the circumferential direction after a respective first shoulder 108 by a locking recess 110. The distance A1 in the direction of the central axis 64 of the ramp geometry 106 from the base surface 112 of the central coupling section 16 is greater than the distance A2 of the locking recess 110 from the base surface 112.

[0075] Adjacent to each of the locking recesses 110 in the circumferential direction is a second shoulder serving as a rotation limit stop 114. The surface normal of the surface 116 of the locking lug 72 pointing toward the central section 78, as well as the surface normal of the locking recess 110, is tilted relative to the longitudinal axis 62 and the central axis 64, respectively.

[0076] The central coupling section 16 of the force distribution means 14 is provided and configured to engage the locking lugs 72 of the nut 8 by rotating the force distribution means 14 relative to the nut 8, while the outer contour 82 of the central section 78 of the nut 8 is located in the passage 10 of the wall 12. Fig. 3 shows a state in which the holder 2 is not locked. Fig. 4 shows a state in which the holder 2 is locked.

[0077] Fig. 5 shows a schematic view of the cooking appliance 4 with the vapor pot 34 in the ceiling area on the wall 12.

[0078] In the following, an assembly or an assembly process of the functional unit 60 is described with reference to Fig. 1 to Fig. 5.

[0079] In a first step, the nut 8 is inserted into the passage 10 of the wall 12 from the inner side 28 of the oven tube outwards, i.e., in the direction of vapor flow, until the side surface 100 of the shoulder 47 rests against the inner side 28 of the oven tube. The shape of the outer contour 82 and the inner contour of the passage 10 ensure that the nut 8 cannot twist relative to the oven tube 6. Until it is locked with the force distribution means 14, it may be necessary to actively hold / position the nut 8 in the passage 10.

[0080] The force distribution means 14 is then positioned on the outer side 24 of the wall 12, wherein the longitudinal axis 62 of the nut 8 coincides with the central axis 64 of the force distribution means 14 and the force distribution means 14 is rotated relative to the nut 8 about the central axis 64 such that the central recess 56 in the central coupling section 16 of the force distribution means 14 allows the bayonet section 66 of the nut 8 to penetrate with the two locking lugs 72 along the longitudinal axis 62. The support section 28 rests in an annular area around the vapor openings 26 of the wall 12.

[0081] In a third step, the force distribution means 14 is preloaded along the central axis 64 in the direction of the wall 12, so that the bayonet section 66 of the nut 8 penetrates the central recess 56 in the central coupling section 16 of the force distribution means 14 and at least the two locking lugs 72 lie completely on the side of the base surface 112 of the central coupling section 16 facing away from the wall 12 and thus a rotation about the central axis 64 is possible in at least one direction until the surface 116 of the locking lugs 72 contact the ramp geometries 106. Subsequently, the force distribution means 14 is rotated relative to the nut 8 about the central axis 64 in the same direction of rotation as in the third step, so that the surface 116 of the two locking lugs 72 engage in the locking recess 110 via the ramp geometry 106 after overcoming the shoulder 62.The force distribution device 14 is clamped against the nut 8 until it reaches the shoulder 62 and then partially released upon reaching the locking recess. The rotation limit stop 114 prevents overtightening beyond the locking recess.

[0082] In a fifth step, the vapor trap 34 with the catalyst / filter 38 is positioned on the inside of the wall 12 so that the second central recess 48 of the second coupling section 46 is aligned with the blind hole 90 with the internal thread 92. The annular second support section 30 of the vapor trap 34 rests on the wall 12 opposite the first support section 22 of the force distribution means 14.

[0083] Subsequently, screw 42 is inserted through the central recess 32 of the central coupling section 29 of the vapor trap 34 and the third central recess 54 of the catalytic converter / filter 38. The vapor trap 34 is clamped using the thread of screw 42 and nut 8. In doing so, the side surface 100 of the shoulder 47 moves away from the wall 12, as the preload of the screw exceeds that of the force distribution device. The bending stress within the wall 12 due to the preload of the force distribution device 14 is thus resolved. Even with the vapor trap 34 fixed, no further bending stress occurs within the wall 12.The length of the screw 42 is adapted to the geometry of the nut 8, the force distribution means 14, the wall 12 and the vapor chamber 12 in such a way that the screw 42 hits the bottom of the blind hole 48 when the side surface 100 of the shoulder 47 is removed from the wall 12, but the polygonal outer contour 82 of the nut 8 is still positioned in the passage 10 of the wall 12 in a rotationally secure manner.

[0084] Variations

[0085] As an alternative to an internal thread, the first fastening means may be provided with an external thread or a stud bolt with an external thread, and the second fastening means with an internal thread. In other words, the first fastening means may resemble a screw and the second fastening means a nut.

[0086] Instead of a screw connection, a rotary locking mechanism or bayonet locking mechanism can also be formed between the first and second fastening means.

[0087] In summary, the holder 2 according to the invention can achieve a bend-free fixation of a functional unit to a wall 12 of a cooking appliance 4.

[0088] List of reference symbols

[0089] 2 bracket

[0090] 4 Cooking appliance

[0091] 6 first fastening means

[0092] 8 mother

[0093] 10 Draft

[0094] 12 wall

[0095] 14 force distribution devices

[0096] 16 central coupling section

[0097] 18 spring section

[0098] 20 radial strut

[0099] 22 first edition section

[0100] 24 Outside

[0101] 26 steam vents

[0102] 28 Inside

[0103] 30 second edition section

[0104] 32 Recording section

[0105] 34 vapor pot

[0106] 36 circulation sales

[0107] 38 Catalytic converter / filter

[0108] 40 second fastener

[0109] 42 screw

[0110] 44 Floor

[0111] 46 second coupling section

[0112] 48 second central recess

[0113] 50 bundles

[0114] 52 Wheel surface

[0115] 54 third central recess

[0116] 56 shaft

[0117] 58 vapor trap holes

[0118] 60 functional unit

[0119] 62 Longitudinal axis

[0120] 64 Central axis 6 Bayonet section 8 Locking head 0 Locking geometry

[0121] 72 locking lug

[0122] 74 side surface

[0123] 76 bayonet lock

[0124] 78 middle section

[0125] 80 polygonal circumferential section

[0126] 82 polygonal outer contour

[0127] 84 Rounding

[0128] 86 Coupling section

[0129] 88 paragraph

[0130] 90 blind hole

[0131] 92 internal thread

[0132] 94 Hole bottom

[0133] 96 stops

[0134] 98 distal screw end

[0135] 100 side area

[0136] 102 first central recess

[0137] 104 Locking geometry

[0138] 106 ramp geometries

[0139] 108 first paragraph

[0140] 110 locking recess

[0141] 112 floor space

[0142] 114 Rotation limit stop

[0143] 116 area

[0144] A1 distance

[0145] A2 distance

[0146] R2 minimum radial extension

[0147] R3 maximum radial extension

Claims

CLAIMS 1. Holder (2) for fastening a functional unit (60), in particular a vapor extraction unit, to an inner side (28) of a wall (12) of a cooking appliance (4), in particular an oven ceiling, comprising: a first fastening means (6), in particular a nut (8), to which a second fastening means (40), in particular a screw (42), of the functional unit (60) can be fastened and which can be passed through a passage (10) in the wall (12), in particular from the inside to the outside; and a force distribution means (14) for the large-area distribution of forces on the wall (12), which can be arranged on an outer side (24) of the wall (12) and can be coupled to the first fastening means (6), in particular without tools, preferably by means of a rotary latch or bayonet lock, and via which the first fastening means (6) can be fixed in the passage (10), in particular spring-elastically prestressed against the inner side (28) of the wall (12).

2. Holder (2) according to claim 1, characterized in that the force distribution means (14) is pot-shaped, star-shaped or wheel-shaped and has a central coupling section (16) for coupling the first fastening means (6) and at least one ring-shaped or ring-segment-shaped support section (22) for supporting on the outer side (24) of the wall (12), which support section is radially spaced from the central coupling section (16) in such a way that it surrounds material weakenings in the wall (12), in particular vapor openings (26).

3. Holder (2) according to claim 2, characterized in that the at least one support section (22) is connected to the central coupling section (16) via at least one radial strut (20) which spans the material weakenings in the wall (12).

4. Holder (2) according to claim 2 or 3, characterized in that the central coupling section (16) has a central recess (102) and a locking geometry (104), in particular one outside the central recess (102) arranged and extending in the circumferential direction, rising ramp geometry (106) with an adjoining latching recess (110) and an adjoining rotation limiting stop (114), and the first fastening means (6) has a locking head (68) with a latching geometry (70), in particular latching noses (72), which can be passed through the central recess (102) and can be brought into releasable latching or locking engagement with the latching geometry (104) on the central coupling section (16) of the force distribution means (14) by relative rotation of the first fastening means (6) and force distribution means (14).

5. Holder (2) according to one of claims 1 to 4, characterized in that the first fastening means (6) has a circumferential section (80) adapted to the geometry of the passage (10) in the wall (12), in particular a non-rotationally symmetrical or polygonal section, in order to prevent a relative rotation of the first fastening means (6) to the wall (12) and to enable an axial movement in the passage (10).

6. Fastening system with a holder (2) according to one of claims 1 to 5 and a functional unit (60), in particular a catalyst or filter unit, preferably a vapor trap unit, wherein the functional unit (60) has a receiving section (32), which is preferably designed as a vapor trap (34), a catalyst and / or filter (38) arranged therein and the second fastening means (40), in particular the screw (42), for fastening the functional unit (60) to the first fastening means (6) of the holder (2).

7. Fastening system according to claim 6, characterized in that the receiving section (32) is pot-shaped and has a central coupling section (46) with a central recess (48) for receiving the second fastening means (40) and at least one ring-shaped or ring-segment-shaped support section (30) for resting on the inner side (28) of the wall (12), wherein the radial distance of the at least one ring-shaped or ring-segment-shaped support section (30) of the functional unit (60) corresponds to the radial distance of the at least one ring-shaped or ring-segment-shaped support section (22) of the holder (2) and lie opposite one another in the fastened state.

8. Fastening system according to claim 6 or 7, characterized in that the first fastening means (6) and / or the second fastening means (40) is provided with a stop (96) which limits the forces acting on the force distribution means (14) of the holder (2) and the receiving section (32) of the functional unit (60) during mutual connection.

9. Cooking appliance (4), in particular an oven, with a fastening system according to one of claims 6 to 8, which is fastened in the region of a weakened region of a wall (12) of the cooking chamber, in particular due to vapor openings (26), wherein the functional unit (60) is fastened to the holder (2) with the wall (12) interposed and the functional unit (60) and the holder (2) clamp the wall (12) between them with their support sections (22, 30) surrounding this region, completely relieving the weakened region.

10. Method for fastening a functional unit (60), in particular a vapor pot unit, to an inner side of a wall (12) of a cooking appliance (4), in particular an oven ceiling, by means of a fastening system according to one of claims 6 to 8: Passing the first fastening means (6) through the passage (10) in the wall (12); and Positioning the force distribution means (14) of the holder (2) on an outer side (24) of the wall (12) so that a locking element of the first fastening means (6) penetrates a central coupling section (16); Rotating the force distribution means (14) relative to the first fastening means (6) until the locking geometry (104) of the force distribution means (14) and the locking geometry (70) of the first fastening means (6) lock together; Positioning the functional unit (60) on the inner side (28) of the wall (12) such that the central coupling section (46) of the functional unit and the central coupling section (86) of the first fastening means (6) are aligned with one another; Fixing the functional unit (60) to the holder (2) by means of the second fastening means (40).

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