EP3182002A1 - Lighting module - Google Patents

Abstract

There is provided a lighting module (10), in particular for a household appliance, comprising a housing (12), a light unit (14, 56) with a carrier element (56) and a light source (14), for example a light emitting diode, and one of the Housing (12) separate cooling element (66). The lighting module (10) also has a fastening device (30, 48, 72 ad) with a cover (30) for the housing (12), a support surface (48) for the support element (56) and at least one elastically deformed fastening element (72 ad ) acting between the lid (30) and the cooling element (66). In a preferred embodiment, the housing (12) comprises an outer frame body (18) having outer walls (20 a-d) and an inner frame body (36) disposed between the outer walls (20 a-d). The outer frame body (18) and the inner frame body (36) have an opening (28) in the main emission direction (P) of the illumination module. The bearing surface (48) is preferably arranged on the inner frame body (36) on the side of the inner frame body (36) facing the main emission direction (P) of the light unit (14, 56). The inner frame body (36) is preferably spaced transversely to the main radiation direction (P) from the outer walls (20 a-d).

Description

The present invention relates to a lighting module, in particular for a household appliance.

From the DE 10 2011 086 968 A1 For example, a lighting module for a household appliance is known, which contains a circuit board with at least one light source. The lighting module is assembled by gluing the heat sink and the board together before use in the housing of the lighting module.

US 2002/0044456 A1 describes a lighting module with a housing and an LED arranged on a board. The board is glued to the housing inside the housing, the housing itself being the heat sink.

Gluing the board to the cooling element in both lighting modules is relatively time consuming. This adds to the total time required to assemble the lighting module.

The object of the present invention is to provide an improved concept for a lighting module, which allows a simple and time-saving construction.

This object is achieved with a lighting module according to claim 1 and a household appliance according to claim 15.

The lighting module according to the invention has a housing for receiving a light unit. The light unit of the illumination module has a carrier element with at least one light source. The light unit is preferably arranged in the housing. The lighting module has a cooling element separate from the housing for cooling the light unit. The fastening device for the cooling element and the light unit on and / or in the housing has a cover for the housing, which is connected to the housing, a bearing surface for the support element and at least one elastically deformed fastening element, which between the cooling element and the lid is effective to push the cooling element to the support element.

In addition, a domestic appliance with the lighting module according to the invention is specified. The household appliance is, for example, a kitchen household appliance, in particular an extractor hood.

The lighting module according to the invention is simple in construction and can be assembled quickly. In addition, a rattling of the lighting module, for example, the cover against the housing or the cooling plate or the support member against each other or against the housing in vibration, as they may occur for example in cooker hoods, can be largely avoided. The fastening device with the elastically deformed fastener also provides some tolerance to mechanical shock or movement. By the fastening device, a flat and preferably uniform pressing of the cooling element to the support element of the light unit be achieved. Finally, coarser tolerances in the manufacture of the components of the housing can be compensated with the fastening device with an elastically deformed fastening element.

In a preferred embodiment, the illumination module has a light guide element and an optical frame, wherein the light guide element is held between the optical frame and the housing. The light-guiding element is set up to appropriately guide the light from the light source in order to determine a radiation characteristic of the lighting module. The light guide element has corresponding parts such as lenses or reflectors.

The lighting module can be set up, for example, for use in a household appliance, in particular in a kitchen household appliance. The kitchen household appliance is, for example, an extractor hood, a refrigerator or a stove oven.

The lighting module can be used for example for the interior lighting of the household appliance or the lighting of the environment of the household appliance. The lighting module can be arranged in, on or at the household appliance. The lighting module can be embedded, for example, in an extractor hood or a kitchen cabinet.

The light unit has a carrier element and at least one light source. The illumination module can have two or more carrier elements, wherein at least one light source is arranged on a carrier element. The support element is preferably a plate-shaped or strip-shaped carrier element. On or in the carrier element lines or electrical components may be arranged for operating the light source. The carrier element may be, for example, a printed circuit board. The light source preferably has a light-emitting semiconductor component. The light source may represent, for example, a light emitting diode (LED). The light unit can define a main emission direction, which can be modified by a light guide element of the illumination module to a main emission direction of the illumination module.

The housing is used to hold the light unit. Preferably, the carrier element and / or at least one light source are arranged in the housing. The housing may, for example, cover the light unit transversely to the emission direction of the light source or the modified emission direction by the light guide element and / or visually and / or mechanically shield it. Preferably, the housing is in one piece. In particular, the parts of the housing are preferably connected to each other seamlessly in one piece. The housing is preferably made of plastic. Preferably, the housing is made of non-transparent material. The housing may be made, for example, by an injection molding process. In one embodiment, the housing has an outer frame body with outer walls. By way of example, the frame body may have four walls which are spaced apart from one another, for example in a cuboid, transversely to the emission direction of the light source or of the light-guiding element. The outer frame body has an exit opening for the light in the emission direction of the light unit or of the illumination module. The outer frame body may also have an opening in the direction of radiation have opposite side. Lighting modules are often arranged, for example in an extractor hood, so that the emission direction points downwards. Accordingly, the lighting module according to the invention can be open at the bottom and / or on the opposite side, upwards.

The housing and the cooling element are designed as separate components. The cooling element is preferably spaced from the housing. The cooling element can be, for example, a plate-shaped or otherwise shaped heat sink. The cooling element preferably contains or consists of aluminum or highly thermally conductive plastic. The cooling element may have cooling ribs or be free of cooling ribs. In particular, the cooling element can act passively by absorbing heat from the light unit and delivering it to the environment. For this purpose, a good investment of the cooling element to the light unit is required, which is ensured by the fastening device according to the invention.

For this purpose, the fastening device provides a bearing surface for the carrier element of the light unit. The cooling element and the carrier element are arranged in particular between the fastening element and the support surface. Preferably, the support surface is arranged on the housing. Preferably, the carrier element is in contact with the support surface on the support surface. The bearing surface serves to support the carrier element. About the support surface to the force required by the elastically deformed fastener on the cooling element and the support member counterforce is transmitted to the support member and the cooling element. The bearing surface can be connected or not connected. The support surface may have flat, strip-shaped, line-like sections and / or quasi-point-like sections. The support surface can be spanned by a transverse direction and a longitudinal direction. The transverse direction and the longitudinal direction can be perpendicular to each other.

Strip-shaped and in particular linear or quasi point-shaped sections offer the advantage that the heat transfer between the support surface and the carrier element can be small, so that the heat is preferably dissipated primarily via the cooling element. Apart from a reduced heat transfer can be achieved with appropriate bearing surfaces a defined support and thus orientation of the light unit in the lighting module in general rather than with a large contact surface. With large-area plastic surfaces, for example, there is the danger that, despite the greatest care during production, they will not be completely flat.

The support surface is arranged on a support surface. Preferably, the support surface is arranged on the support surface on a side facing the main emission of the light unit or the lighting module side of the support surface support. The bearing surface can be arranged in particular on the housing. For example, the housing may have a frame body with a support surface. The support surface is preferably arranged in an inner space bounded by the housing.

In a preferred embodiment, the support surface for the support element of the light unit is strip-shaped. For example, form strip-shaped sections of Support surface a frame-shaped support surface. The frame-shaped bearing surface may have interruptions.

The fastening device also has an elastically deformed fastening element which acts between the cooling element and the cover in order to press the cooling element against the support element. The fastener may be connected, for example, to the cooling element or to the cover in direct or indirect contact, e.g. over an intermediate part, stand. Preferably, the cooling element and the fastening element or the cover and the fastening element define a common contact surface.

In a preferred embodiment, the connection between the cooling element and the carrier element is exclusively a positive and / or non-positive connection. In addition, the connection between the carrier element and the support surface is preferably exclusively a positive and / or non-positive connection.

The lid is preferably a separate component from the housing. The lid may be as well as the housing made of plastic. Preferably, the lid is in one piece. In particular, the parts of the lid are preferably connected together integrally seamlessly. The illumination module has an emission side in the emission direction of the light unit or the illumination module. The lid is preferably arranged on the opposite side. The lid may at least partially cover or shield the interior of the housing.

The described embodiments can be combined with each other. Hereinafter, preferred embodiments of the lighting module and the household appliance.

In a preferred embodiment, the fastener is a flexurally deformed fastener. For example, the fastener may be a flexurally deformed spring tongue or a bend-elastically deformed bracket. The fastener may alternatively comprise, for example, an elastically deformed mat, or one or more pads or strips of elastically deformed material.

In a preferred embodiment, the fastener is attached to the lid. This facilitates the assembly of the lighting module. Alternatively or additionally, however, the fastening element can also be fastened, for example, to the cooling element. The fastening element is preferably seamlessly connected in one piece with the cover or the cooling element. Otherwise, it may for example be screwed, glued, welded or clamped to the cover or the cooling element. The fastening element is preferably arranged such that it is elastically deformed when the cover is placed on the housing when the support plate and cooling element are arranged in the housing.

In a preferred embodiment, the lid defines a plane with at least one fastener disposed in the plane. The lid may, for example, have a plate-shaped element, which is arranged oriented, for example, transversely to the emission direction. The plane may be defined by such a plate-shaped element. In one embodiment, an opening or recess may be provided in the plate-shaped member its defining an opening edge. Preferably, the opening edge encloses the opening. In one embodiment, spring tongues or spring clips may be arranged as fastening elements at the opening edge in the plane defined by the plate-shaped element. In this way, a compact design of the lighting module can be obtained.

For a heat transfer as flat as possible and preferably uniform contact of the cooling element and the carrier element to each other is advantageous. In a preferred embodiment, a heat conducting layer is arranged between the cooling element and the carrier element. Unevennesses of the cooling element and of the carrier element can be compensated in particular by the heat-conducting layer in order to improve the heat transfer between the carrier element and the cooling element. The heat-conducting layer may for example consist of solid, liquid or pasty material. The heat conducting layer material may be at least slightly yielding or elastic and correspondingly deformed in the direction of the spring force, in particular the component transversely to the support surface. The heat-conducting layer may be, for example, a silicone layer, in particular a silicone film.

The heat-conducting layer is preferably non-adhesive at least on one side. Accordingly, the heat-conducting layer preferably does not impart any adhesive bond between the cooling element and the carrier element. Preferably, the connection between the cooling element and the carrier element is otherwise otherwise adhesive bond free. The cooling element can thus be arranged more easily on the carrier element already arranged in the housing.

In a preferred embodiment, the housing has a latching connection means and the cover has a counter-latching connection means for connecting the cover to the housing. As a result, an easy to manufacture and possibly easy to be solved connection between the housing and the lid is provided. The latching connection means may be, for example, an opening or a recess in a housing wall. The counter-latching connection means may be, for example, a latching arm in the sense of a resilient bar element or of an at least partially compliant lid frame with at least one latching lug.

In a preferred embodiment, the housing has an outer frame body which defines an interior of the housing. The lighting module further comprises, in this embodiment, a seat support that provides the support surface and is disposed in the interior of the outer frame body. The support surface carrier may be, for example, an inner frame body. The support surface support and / or the support surface are in the embodiment in the transverse direction and / or the longitudinal direction, which span the support surface, preferably spaced from the outer frame body on opposite sides. Preferably, the support surface and / or the support surface in the transverse direction and / or the longitudinal direction of each outer wall of the outer frame body are spaced.

In a lighting module according to this embodiment, the connection between the cooling element and the light unit and between the light unit and the support surface be decoupled from the outer frame body. Mechanical action on the outer frame body, for example when inserting the lighting module in a recess of a kitchen cabinet or arranged on any other household appliance recess can thus be kept away from the connection between the cooling element, the light unit and the support surface. The fastening device with the elastically deformed fastening element also offers in this embodiment, a certain tolerance to mechanical shock or movement.

Between the outer frame body and the support surface support and / or the support surface, for example, parts or sections of the cover or an optical frame for fixing the light guide element to the housing may be arranged with existing spacing.

In an advantageous embodiment, for the, for example, frame-shaped, bearing surface at least two planes are defined transversely to the support surface, which limit the support surface transverse to the planes. In particular, the planes can abut the bearing surface at at least one point and / or along a line of the bearing surface. For example, the planes may be parallel to each other. The planes define an intermediate region between the planes in which the bearing surface is arranged and a complementary outer region. In the embodiment, the carrier element preferably has a peripheral projection, which is arranged in the outer region. A contact device may be arranged on the edge-side projection in the outer region, the light unit being operated on the contact device can be contacted electrically. In this way, the light unit can be contacted, for example, for feeding with electrical energy, largely without affecting the arrangement of the parts of the lighting module in the intermediate region. Independently of this, a lighting module can be created in this way, which can be contacted in a particularly simple manner and also after the assembly of the lighting module.

In an advantageous embodiment, at least two, in a particularly preferred embodiment, four planes are defined transversely to the support surface, which limit the support surface transverse to the planes for the support surface. The bearing surface is preferably arranged between the planes, so that the planes bound the bearing surface to the outside. Two planes are preferably parallel to each other. Four levels may form two pairs of parallel opposing planes, with the pairs perpendicular to each other. The fastener and the cooling element are in this embodiment preferably exclusively at one or more contact points, e.g. Contact surfaces that are in contact between the planes spaced from the planes. In this way, a particularly uniform pressing of the cooling element can be achieved on the support element.

In an advantageous embodiment, the cooling element has an edge zone and a central zone, which is bounded by the edge zone. For example, the central zone is bounded by the edge zone with respect to the longitudinal direction and the transverse direction, which span the support surface. The fastening element and the cooling element can preferably be arranged exclusively on at the central zone Be in contact with contact points. Preferably, the contact points are arranged on the central zone at a distance from the edge zone, wherein the distance in the longitudinal direction and / or transverse direction is measured, which span the support surface.

In a preferred embodiment, the fastening element, in particular a fastening element designed as a spring tongue, engages over the bearing surface. Preferably, the support surface bounds the contact point between the fastening element and the cooling element relative to the longitudinal and transverse extension direction of the support surface. In this case, the contact point, which is formed between the fastening element and the cooling element, also preferably arranged spaced in the longitudinal and / or transverse extension direction of the support surface of the support surface spaced.

A further developed according to at least one of these embodiments lighting module may have a particularly uniform contact of the cooling element to the support member.

In an advantageous embodiment, the housing has an outer frame body with outer walls. Preferably, the outer walls are arranged transversely to the cooling element. The cooling element is preferably spaced from at least one outer wall transverse to the outer wall. The cooling element may be spaced, for example, from two opposite outer walls each transverse to the outer walls. More preferably, the cooling element is spaced from the outer frame body transversely to the outer walls. Alternatively or additionally, the outer walls may be arranged transversely to the carrier element. The carrier element is preferably spaced from at least one outer wall transverse to the outer wall. The carrier element can be spaced, for example, from two opposite outer walls in each case transversely to the outer walls. Particularly preferably, the carrier element is arranged at a distance from the outer frame body transversely to the outer walls.

In an advantageous embodiment, the housing has an outer frame body with outer walls and an inner frame body with inner walls. The inner frame body is disposed between the outer walls. The outer walls may be oriented transversely to the support surface and / or the support element of the light unit. The inner walls can be oriented at least in sections transversely to the support surface and / or the support element. Preferably, the inner frame body is spaced from the outer frame body transversely to the emission direction of the light unit or the illumination module. The inner frame body may be spaced from the outer frame body transversely to the outer walls. Preferably, a free space is defined between an inner wall and the opposite outer wall. Particularly preferably, a free space is defined transversely to the main emission direction between the inner frame body and the outer frame body around the inner frame body, wherein the clearance, e.g. by connecting walls between the inner frame body and the outer frame body, may be interrupted. For example, a section of a cover frame may be arranged in the free space, or a section of the optical frame may be arranged there.

In a lighting module according to at least one of the embodiments described above, the transmission be reduced by mechanical shock or vibration or mechanical forces, eg when installing the lighting module on the arrangement of the cooling element and / or the support member. In a clearance between the cooling element and the outer frame body and / or between the support member and the outer frame body and / or between the outer frame body and the inner frame body, portions or parts of the lid or an optical frame may be arranged due to the distance, for example. Overall, such a robust and optionally compact lighting module can be created.

In a preferred embodiment, the illumination module has a light guide element and an optical frame, wherein the light guide element is held between the optical frame and the housing. The optical frame may be made of plastic or metal, for example. The optical frame is attached to the housing with a fastener. Preferably, the fastening means is adapted to the connection between the optical frame and the housing with already installed light unit, cooling element and lid can be made on the or in the housing. Housing, light unit, cooling element and cover form a first functional part while the optical frame and the light guide form a second functional part, wherein the second functional part can be connected in this embodiment with the first functional part with already mounted first functional part. In a preferred embodiment of the optical frame is connected to a latching connection means with the housing, wherein the latching connection means comprises a latching means and a counter-latching means. Particularly preferred are the locking means and the counter-locking means in composite and optionally in the household appliance installed first functional part in and / or disengageable. In a particularly preferred embodiment, the optical frame is held exclusively with latching connection means on the housing. The housing can for this purpose have latching connection means and the optical frame corresponding mating latching means. The housing may for example have openings or recesses, for example in outer walls. The optical frame may in this case have one or more latching arms each having one or more latching lugs.

In a particularly preferred embodiment of a lighting module described above, the parts of the lighting module are connected to each other exclusively by positive and / or non-positive connections.

In the case of a further developed lighting module according to at least one embodiment described above, installation or replacement of the optical frame and / or the light-guiding element is particularly simple even when the first functional part is assembled. Due to the fastening device according to the invention with an elastically deformed fastening means, the connection between the cooling element and the carrier element and the arrangement of the carrier element on the support surface remains largely unaffected even with mechanical action on the lighting module in subsequent installation of the optical part.

Due to the modular design with a first and a second functional part can easily a large variety of variants for the illumination module according to the invention to be provided. For this purpose, in particular the second functional part can be kept in different forms, for example by the choice of different manufacturing materials for the optical frame, such as plastic or metal or stainless steel, or by different colors of the optical frame, eg by the use of correspondingly colored materials, or by different nature the visible in the installed state from the outside surface of the optical frame, eg by suitable surface treatment or surface structuring. Furthermore, the use of different light-guiding elements can also be provided in order to be able to generate suitable light distribution as required.

Further advantages and features of the present invention are apparent from the description of the figures and the figures.

• Figur 1 - eine Ausführungsform des erfindungsgemäßen Beleuchtungsmoduls in einer perspektivischen Ansicht,
• Figur 2 - eine Ausführungsform des Gehäuses für ein erfindungsgemäßes Beleuchtungsmodul nach Figur 1 in einer perspektivischen Ansicht,
• Figur 3 - eine Ausführungsform des Deckels für ein erfindungsgemäßes Beleuchtungsmodul nach Figur 1 in einer perspektivischen Ansicht,
• Figur 4 - das erfindungsgemäße Beleuchtungsmoduls nach Figur 1 in einer perspektivischen Schnittdarstellung,
• Figur 5 - das erfindungsgemäße Beleuchtungsmodul nach Figur 1 in einer weiteren perspektivischen Schnittdarstellung,
• Figur 6 - das erfindungsgemäße Beleuchtungsmodul nach Figur 1 in einer Schnittdarstellung,
• Figur 7 - eine weitere Ausführungsform des erfindungsgemäßen Beleuchtungsmoduls.

Im Folgenden wird auf die Figuren 1 bis 7 Bezug genommen.Show it:

• FIG. 1 an embodiment of the illumination module according to the invention in a perspective view,
• FIG. 2 - An embodiment of the housing for an inventive lighting module according to FIG. 1 in a perspective view,
• FIG. 3 - An embodiment of the lid for an inventive lighting module according to FIG. 1 in a perspective view,
• FIG. 4 - After the lighting module according to the invention FIG. 1 in a perspective sectional view,
• FIG. 5 - After the lighting module according to the invention FIG. 1 in a further perspective sectional view,
• FIG. 6 - After the lighting module according to the invention FIG. 1 in a sectional view,
• FIG. 7 - Another embodiment of the illumination module according to the invention.

The following is on the FIGS. 1 to 7 Referenced.

This in FIG. 1 Perspective illustrated lighting module 10 may be, for example, for use in a household appliance, in particular a kitchen household appliance, such as an extractor hood, set up.

The lighting module 10 has a housing 12, which consists for example of plastic. The housing 12 may be made by an injection molding process. The housing 12 is preferably opaque. The housing 12 defines the interior of the housing 12 transversely to the main emission direction P, which is defined by the light source 14 or a light guide 16 and shields it to the outside. The housing 12 has for this purpose an outer frame body 18, which in the exemplary embodiment has four outer walls 20 a-d and is cuboidal. The housing 12 and in particular the outer frame body 18 may also have other basic shapes, e.g. be polyhedral or round.

The side from which the light exits the housing may be referred to as the underside 22 of the housing 12. The housing 12 has for this purpose a corresponding outlet opening 28 on the underside 22. On the main radiation direction P of the light source opposite, parallel to the underside 22 top 24 of the lighting module 10, a lid 30 is arranged, which shields the housing 12 upwards. The lighting module 10 can be inserted in the direction in which the top 24, in a recess of a household appliance, not shown, for example, a cooker hood. For attachment of the lighting module 10 in a household appliance, such as an extractor hood, the housing 12 has a fastening means on the outer frame body 18, such as spring tabs 32 on.

The light-guiding element 16 and an optical frame 34 are arranged on the underside 22 of the housing 12, in particular as shown in FIGS FIGS. 1 and 4 to 6 is apparent. The light-guiding element 16 conducts the light from the light source 14 and serves to establish the emission characteristic of the illumination module 10. For example, the light-guiding element 16 can determine a radiation direction of the illumination module 10 which is modified with respect to the main emission direction P of the light source 14.

FIG. 2 shows an embodiment of the housing 12 of the illumination module 10 according to the invention FIG. 1 in perspective view.

The four mutually perpendicular outer walls 20 ad limit the interior IR of the housing transversely to the emission direction of the light unit 10. Within the space defined by the outer frame body 18 interior IR an inner frame body 36 is arranged. The inner frame body 36 has four inner walls 38 ad. An inner wall 38 ad is opposed to an outer wall 20 ad. Each inner wall 38 ad is spaced apart from its opposite outer wall 20 ad. In particular, a free space 40 ad is arranged between each inner wall 38 ad and the opposite outer wall 20 ad. The inner frame body 36 is connected to the outer frame body 18 via connecting walls 42. The outer frame body 18 and the inner frame body 36 are open downward in the main radiation direction P, so that light can exit the housing 12 in the radiation direction.

As in particular in the FIGS. 4 to 6 shown, each inner wall 38 ad each have a flat wall portion 44 ad. The flat wall section 44 ad may be arranged parallel to the outer wall 20 ad opposite the inner wall 38 ad. Each inner wall 38 ad is connected via a curved wall portion of a connecting wall 42 and a transverse to the outer wall wall portion of the connecting wall 42 with the inner wall 38 ad opposite outer wall 20 ad ad. The inner walls 38 ad each have a line-like or strip-shaped surface facing the spring force F of the elastically deformed spring tongues 72 ad. The linear or strip-shaped surfaces of the inner walls together form a frame-shaped, planar, counter to the spring force-facing support surface 48. Accordingly, the inner frame body 36 forms a support surface. The support surface 48 may be continuous. The support surface 48 may alternatively consist of non-contiguous sections. The sections may be in an extreme case, for example, virtually point-like.

The support surface 48 is spanned by a longitudinal direction LR and a transverse direction QR. The bearing surface 48 is spaced apart from respective outer walls 20 ad in the transverse direction QR or in the longitudinal direction LR. The respective outer wall surfaces 50 ad of the flat wall sections 44 ad of the inner walls 38 ad facing the outer wall 20 ad, on which the support surface 48 is arranged, each define a plane 50 ad transverse to the support surface 48. In FIG. 6 are the levels 50 a and 50 c additionally indicated by a dashed line. The support surface 48 is between the levels 50 ad arranged and the levels 50 ad limit the support surface 48 each transverse to the planes 50 ad.

Between the inner walls 38 a-d, an intermediate wall 52 is arranged and connected to the inner walls 38 a-d. The intermediate wall 52 is offset relative to the support surface 48 in the main emission direction P of the light source 14. The intermediate wall 52 includes an opening 54. In an alternative embodiment, this intermediate wall may not be present. The opening 54 may be limited in such an embodiment of the inner walls 38 a-d.

The illumination module 10 has a carrier element 56, on which the light source 14 is arranged. The carrier element 56 may be, for example, a printed circuit board 56. The carrier element 56 rests on the support surface 48. The support member 56 is spaced apart from the outer walls 20 ad of the outer frame body 18 transversely to the outer walls 20 ad. The support member 56 has, as in FIG. 4 shown, a peripheral projection 58 in the longitudinal direction LR of the support surface 48 on the support surface 48 on. In other words, the support member 56 has a protrusion 58 in a complementary outer region 60 to the intermediate portion 62 which is bounded outwardly by the planes 50 ad which define the support surface 48 to the outside. The supernatant 58 may be adapted for electrical contact with the supply of the light source 14. For example, the peripheral projection 58 may be configured to receive a connector, for example a connector according to the raster connection technique (RAST). A corresponding plug can be secured to the lid 30 with a snap lock 64.

The illumination module 10 can basically also have a plurality of carrier elements 56. On the support member 56 is, as in FIG. 4 can be seen, a single light source 14 is arranged. It is also possible for a plurality of light sources 14 to be arranged on a carrier element 56. The light source 14 is preferably a light-emitting diode (LED). However, the light source 14 may, for example, also be a light source 14 with a filament. The light source 14 is arranged in the illustrated embodiment in the opening 54 in the intermediate wall 52. In addition, the light source 14 is disposed between the inner walls 38 ad of the inner frame body 36.

As in the FIGS. 1 and 4 to 6 is shown on the support member 56, a cooling element 66 is arranged. The cooling element 66 is a component separate from the carrier element 56, the cover 30 and the housing 12. The cooling element 66 is arranged in the housing 12 under the cover 30 under a cover recess 68. By means of the cover recess 68, ambient air can come into contact with the cooling element 66 and transport heat away from it.

A coherent cooling element 66 or a plurality of individual cooling elements 66 can be arranged in the illumination module 10. The cooling element 66 is a rectangular plate in the exemplary embodiment. The cooling element 66 may have a shape other than a rectangular basic shape. The cooling element 66 may be made of aluminum, for example. The cooling plate 66 is preferably free of ribs, but may also have cooling ribs, which may be arranged, for example, in the cover recess 68. The cooling element 66 is respectively from the outer walls 20 ad of the outer frame body 18 transversely to the outer walls 20 ad spaced. Between the cooling element 66 and each outer wall 20 ad a clearance 40 ad is arranged.

Between the cooling plate 66 and the carrier element 56 there is preferably a contact with as large a surface area as possible for heat transfer. The cooling plate 66 either has direct contact with the carrier element 56 or between the cooling plate 66 and the carrier element 56 is a heat conducting layer 70 is arranged. In a simple case, the heat conducting layer 70 may consist of thermal compound. In order to avoid problems, for example, during metering or due to aging of the thermal compound, the heat-conducting layer is preferably a heat-conducting film 70. The heat-conducting film 70 can be somewhat elastic and correspondingly in the direction of the spring force F by the spring tongues 72 on the heat-conducting film 70 itself be deformed. The heat conducting film 70 may be electrically insulating. The heat-conducting foil 70 is preferably non-adhesive at least on one side. The heat-conducting film 70 may be, for example, a silicone film.

The arranged on the upper side 24 of the housing 12 lid 30 is in FIG. 3 also shown as a single part. The lid 30 is a separate from the housing 12 component. The parts of the lid 30 are preferably seamlessly connected together in one piece. The lid 30 may be made of plastic, for example in an injection molding process.

The cover 30 may cover the interior IR of the housing 12 at least in sections. This is indicated by the lid 30, a cover plate 74 which defines a cover plane 76. The cover plate 74 is preferably oriented transversely to the outer walls 20 ad. The cover plate 74 may rest on the outer walls 20 ad or be spaced therefrom.

The lid 30 also has a lid frame 78 which is disposed on the lid plate 74 between the outer walls 20 a-d. On the lid frame 78 locking arms 80 are arranged, which in turn carry latching lugs 82. The locking lugs 82 engage in corresponding latching openings 84, which are arranged in the outer walls 20 a-d of the housing 12.

The cover plate 74 has one or more cover recesses 68 or openings which are arranged in the cover plane 76. The lid recess 68 shown is rectangular. In principle, a lid recess 68 may also have a shape deviating from the rectangular shape, e.g. be around. The shape of the cover recess 68 preferably corresponds to the shape of the cooling element 66.

With the cover four spring tongues 72 ad preferably seamlessly connected in one piece. The spring tongues 72 ad are arranged in the cover plane 76 on the recess edge 86 of the cover recess 68, which delimits the cover recess 68. At the side projecting into the cover recess 68, the spring tongues 72 ad each have a contact extension 88 ad. Via the contact extension 88 ad, the spring tongues 72 ad can be in contact with the cooling element. The spring tongues 72 ad are on the contact extension 88 ad with the cooling element in direct or indirect contact. For example, an intermediate part can be arranged between the contact extension and the cooling element. The spring tongues 72 ad are in contact with the cooling element 66 exclusively via the contact extensions 88 ad. A contact extension 88 ad is preferably spherical segment-shaped, but may also have a different shape. The contact extension 88 ad is arranged at a distance from the recess edge 86.

Instead of four spring tongues 72 a-d, for example, two spring tongues or even only one spring tongue can be sufficient for attachment. As an alternative to spring tongues 72 a-d, one or more flexurally elastic brackets can also be arranged on the cover 30. For example, in the cover plane 76 in the cover recess 68, the brackets can be connected to the cover 30 at at least two points, preferably seamlessly in one piece. The spring tongues 72 a-d or the bracket may alternatively be screwed, glued, welded or clamped to the lid 30, for example.

Instead of flexurally elastic webs 72 a-d or a flexurally elastic strap, it is also possible to provide rigid webs on the cover 30 and to arrange an elastic pad or an elastic mat between the cooling element 66 and the webs. Alternatively or additionally, it is also possible to arrange an elastic cushion or an elastic mat between the cover plate 74 and the cooling element 66, which deform when the cover 30 is fastened to the housing 12. On webs can be dispensed with in this case.

To attach the lid 30, the detents 82 are brought into engagement with the detent openings 84. In one exemplary embodiment, the latching lugs 82 have latching contact surfaces 90. The latching contact surfaces 90 can each with Rastgegenkontaktflächen 92 in the detent openings 84 are in contact. The latching contact surfaces 90 point in a direction counter to the spring force F exerting the elastically deformed fastening elements 72 ad on the support surface 48. The latching contact surfaces 90 are at least slightly inclined relative to the direction of the spring force F. The latching contact surfaces 90 are at least slightly inclined to the respective latching opening 84 pointing. As a result, the latching lugs 82 can be brought out of engagement with the latching openings 84 when the cover 30 is lifted off. It is also possible to achieve an at least slight tensioning of the cover 30 transversely to the spring force F with the latching contact surfaces 90 pointing at an angle to the latching openings 84. In this way, an additional mechanical securing of the cover 30 to the housing 12 and thus also the connection of the cooling element 66 and the support member 56 can be achieved with the fastening device according to the invention.

The interaction of the parts of the fastening device results in particular from the FIGS. 4 to 6 ,

The spring tongues 72 ad are bending elastically deformed when the illumination module 10 is assembled and together exert a force F on the cooling element 66 and on the cooling element 66 also on the carrier element 56 for the light source 14 and on the support surface 48 for the carrier element 56 transversely to the support surface 48 , In composite fastening device, the spring tongues 72 are ad for each of their contact extensions 88 ad contact points 94 in contact with the cooling element 66th

The pads 94 are disposed between the planes 50 a-d defined by the four outer wall surfaces 50 a-d of the inner walls 38 a-d of the inner frame body 36, and spaced from the planes 50 a-d. The contact points 94 are arranged on a central zone 96 of the cooling element 66. The central zone is delimited by an edge zone 98 of the cooling element 66. The contact points 94 are spaced from the edge zone 98 in the longitudinal direction LR and the transverse direction QR, which span the support surface 48. The edge zone 98 may, for example, be arranged outside the four planes 50 a-d, which are defined by the four outer wall surfaces 50 a-d. The central zone 96 may, for example, be arranged between the planes 50 a-d defined by the outer wall surfaces 50 a-d.

In the exemplary embodiment, four levels 100 ad are defined for the support surface 48 by the inner wall surfaces 100 ad of the flat wall sections 44 ad of the inner walls 38 ad of the inner frame body 36, which are arranged transversely to the support surface 48 and set limits for the support surface frame 48 inward , In FIG. 6 are the levels 100 a and 100 c additionally indicated by a dashed line. The pads 94 are disposed between the four planes 100 defined by the inner wall surfaces 100 ad, spaced from the planes 100 ad. In the embodiment, the spring tongues 72 ad each overlap a portion of the support surface 48. The contact points 94 are arranged relative to the longitudinal direction LR and transverse direction QR within the frame formed by the support surface 48. The edge zone 98 may be arranged correspondingly outside the four levels 100 ad, which limit the bearing surface frame 48 inwardly.

With the housing 12, e.g. through the latching connection connected cover 30, the cooling plate 66 is pressed against the support member 56 and this in turn against the support surface 48 on the housing 12. In one embodiment shown in the figures, the connection between the housing 12, cover 30, cooling element 66 and support member 56 may be formed exclusively by a positive connection or exclusively by positive and non-positive connection.

The distances between the cooling element 66 and the outer walls 20 ad, the support member 56 and the outer walls 20 ad and the inner frame body 36 of the outer frame body 18 offer the advantage that mechanical stress of the outer frame body 18, for example when installing the lighting module largely of the Inside the housing 12 and in particular by the arrangement of the cooling element 66 and the support plate 56 can be kept on the support surface 48. By the fastening device with the elastically deformed fastening element 72 ad relatively rough tolerances of the components of the lighting module 10 and between the components can be compensated. The fastening device also ensures that even with mechanical stress of the lighting module 10, the radiation characteristic of the lighting module 10 and a good heat transfer between the light unit 56, 14 and the cooling element 66 are maintained. In the clearance 40 ad between the outer frame body 18 and the inner frame body 36, between the outer frame body 18 and the support member 56 and between the outer frame body 18 and the cooling plate 66, for example, a portion of the lid 30 and / or an optical frame 34 may be arranged be. In this way, a compact lighting module 10 can be obtained.

The light-guiding element 16, by means of which the emission characteristic of the lighting module 10 can be fixed, is held between the optical frame 34 and the housing 12 by the optical frame 34, which is fastened to the housing 12. The optical frame 34 and, correspondingly, the light-guiding element 16 are preferably connected exclusively to the housing 12 in a positive and / or non-positive manner. Particularly preferred is the optical frame 34 on the housing 12 with a latching connection 102 (see in particular FIG. 7 ) attached. The optical frame 34 may be made of steel or plastic, for example.

The housing 12, the carrier element 56 with the light source 14, the cooling element 66 and the cover 30, optionally with the heat-conducting layer 70, may be referred to as the first functional part of the lighting module. FIG. 7 shows the first functional part and a second functional part of the lighting module with an optical frame 34 and a light guide 16 prior to installation in the housing 12. In a preferred embodiment, the fastening means 102 is adapted for attachment of the second functional part with the first functional part, that the connection between the first functional part and the second functional part can also be produced and / or released even if the first functional part already assembled and possibly installed in the household appliance is already assembled. For example, the attachment means for attaching the optics frame 34 to the housing 12 is adapted to secure the attachment of the optics frame 34 to the housing 12 when already assembled and optionally with the home appliance connected first functional part functionally produced and / or can be solved. The fastening means may be, for example, a latching connection means. For example, the fastening means comprises a latching means and a counter-latching means, wherein the latching means, for example a latching projection 104, on the optical frame 34 and the counter-latching means, for example a latching recess 106 for the latching projection, is arranged on the housing 12. According to the example, the fastening means is adapted to the latching means and the counter-latching means in and / or disengaged with already assembled and possibly installed in the household appliance first functional part. For this purpose, the domestic appliance can have, for example, an access opening to the latching means 104 and / or to the counter-latching means 106. In a household appliance and / or a lighting module 10, which is developed according to the above-described embodiment, the attachment of the second functional part, for example technically inexperienced persons can be left.

The lighting module 10 is assembled, in which initially the housing 12 is provided and the carrier element 56 is placed on the support surface 48. On the support element 56 provided, a heat-conducting layer 70, for example a silicone film, may already be arranged on the side of the carrier element 56 facing away from the light source 14. Alternatively, after arranging the carrier element 56 on the support surface 48, a heat-conducting layer 70 can be arranged on the carrier element 56. Thereupon, the cooling element 66 is provided. This is arranged on the carrier element 56. Subsequently, the lid 30 is placed on the top 24 of the housing 12. Get advised the locking lugs 82 engage the respective detent openings 84 and the spring tongues 72 ad in contact with the cooling element 66, so that the spring tongues 72 ad are elastically deformed.

A lighting module 10, in particular for a domestic appliance, is provided which has a housing 12, a light unit 14, 56 with a carrier element 56 and a light source 14, for example a light-emitting diode, and a cooling element 66 separate from the housing 12. The illumination module 10 also has a fastening device 30, 48, 72 ad with a cover 30 for the housing 12, a support surface 48 for the support member 56 and at least one elastically deformed fastener 72 ad, which is effective between the cover 30 and the cooling element 66 , In a preferred embodiment, the housing 12 includes an outer frame body 18 having outer walls 20 ad and an inner frame body 36 disposed between the outer walls 20 ad. The outer frame body 18 and the inner frame body 36 have an opening 28 in the main radiation direction P of the illumination module. The support surface 48 is preferably arranged on the inner frame body 36 on the side of the inner frame body 36 facing the main emission direction P of the light unit 14, 56. The inner frame body 36 is preferably spaced transversely of the main radiation direction P from the outer walls 20 ad. LIST OF REFERENCE NUMBERS 10 lighting module 12 casing 14 light source 16 light guide 18 Outer frame body 20 ad exterior walls 22 bottom 24 top 28 outlet opening 30 cover 32 spring shackles 34 optical frame 36 Inner frame body 38 ad interior walls 40 ad free space 42 connecting walls 44 ad level wall section 48 bearing surface 50 ad Outer wall surfaces / levels 52 partition 54 opening 56 Support member / board 58 Got over 60 outdoors 62 intermediate area 64 catch lock 66 Cooling element / cooling plate 68 Deckelausnehmung 70 heat conducting 72 ad spring tongues 74 cover plate 76 lid plane 78 Lidmaker 80 locking arms 82 locking lugs 84 latching openings 86 recess edge 88 ad Contact extension 90 Rest contact surfaces 92 Rest mating contact surfaces 94 Contact points / pads 96 Central zone 98 border zone 100 ad Inner wall surfaces / planes 102 fastener 104 catch projection 106 recess A cutting plane B cutting plane IR inner space LR Longitudinal support surface QR Transverse direction bearing surface p main radiation F force

Claims (15)

Lighting module (10), in particular for a household appliance, with
a housing (12) for receiving a light unit (14, 56),
a light unit (14, 56) having a carrier element (56) with a light source (14),
a cooling element (66) separate from the housing (12) for cooling the light unit (14, 56),
and with a fastening device (30, 48, 72 ad) for the cooling element (66) and the light unit (14, 56),
the fastening device (30, 48, 72 ad) having a cover (30) for the housing (12) which is connected to the housing (12).
a bearing surface (48) for the carrier element (56),
and at least one elastically deformed fastener (72 ad) operative between the cooling element (66) and the cover (30)
to press the cooling element (66) against the carrier element (56). The lighting module (10) of claim 1, wherein the fastener (30, 48, 72 a-d) is a flexurally deformed fastener (72 a-d) for exerting a spring force on the cooling member (66). Illumination module (10) according to one of the preceding claims, wherein the fastening element (72 a-d), preferably seamlessly in one piece, is fastened to the cover (30). The lighting module (10) of any one of the preceding claims, wherein the lid (30) defines a plane (76) and wherein the fastener (72 a-d) is disposed in the plane (76). Lighting module (10) according to one of the preceding claims, wherein between the cooling element (66) and the carrier element (56) a heat conducting layer (70) is arranged. Illumination module (10) according to claim 5, wherein the cooling element (66) and the carrier element (56) are connected, wherein the connection between the cooling element (66) and the carrier element (56) is only a positive and / or non-positive connection. A lighting module (10) as claimed in any one of the preceding claims, wherein the housing (12) includes detent connection means (84) and wherein the cover includes mating latching means (80, 82) for connecting the cover (30) to the housing (12). Lighting module (10) according to one of the preceding claims, wherein the support surface (48) for the support element (56) of the light unit (14, 56) is strip-shaped. Lighting module (10) according to one of the preceding claims, wherein the housing (12) has an outer frame body (18) defining an interior space (IR) of the housing (12), and wherein the illumination module a support surface support (36) with the support surface ( 48) disposed in the interior space (IR) of the outer frame body (18), wherein the support surface (48) is spanned by a transverse direction (QR) and a longitudinal direction (LR) and wherein the support surface (48) is in the transverse direction (QR) and / or longitudinal direction (LR) on opposite sides with distance from the outer frame body (18) is arranged. Lighting module (10) according to one of the preceding claims, wherein for the support surface (48) at least two levels (50 ad, 100 ad) are defined transversely to the support surface (48), the support surface (48) transversely to the planes (50 ad , 100 ad), wherein the contact point (94), at which the fastening element (72 ad) and the cooling element (66) are in contact, between the planes (50 ad, 100 ad) at a distance from the planes (50 ad, 100 ad) is arranged. The lighting module (10) of any one of the preceding claims, wherein the housing (12) comprises an outer frame body (18) having outer walls (20 ad), the outer walls (20 ad) being transverse to the cooling element (66), the cooling element (66) of at least an outer wall (20 ad) is spaced transversely to the outer wall (20 ad) and / or wherein the outer walls (20 ad) are arranged transversely to the support element (56), wherein the support element (56) of at least one outer wall (20 ad) transverse to the outer wall (20 ad) is spaced. The lighting module (10) according to any one of the preceding claims, wherein the housing (12) comprises an outer frame body (18) and an inner frame body (36), wherein a clearance (40) is provided between the inner frame body (36) and the outer frame body (18) ad). Illumination module (10) according to one of the preceding claims, wherein for the support surface (48) at least two planes (50 ad) are defined transversely to the support surface (48), which limit the support surface (48) transverse to the planes (50 ad), wherein the planes (50 ad) define an intermediate region (62) between the planes and a complementary outer region (60), the carrier element (56) having a peripheral projection (58) in the outer region (60). Illumination module (10) according to one of the preceding claims with a light guide (16) and an optical frame (34), wherein the light guide (16) between the optical frame (34) and housing (12) is held by the optical frame (34), wherein the optical frame (34) and the housing (12) are connected to a fastening means (102, 104, 106) which is arranged such that the connection between the optical frame (34) and the housing (12) is already connected to the housing (12). related Light unit (56, 14), cooling element (66) and lid (30) can be produced. Domestic appliance with a lighting module (10) according to one of the preceding claims.

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