DE202024102888U1 - Luminaire with a light guide and a light-emitting diode arrangement and furniture element therewith - Google Patents

Abstract

Luminaire (1) with an elongated light guide (2) having a vertical axis (H) and a longitudinal axis and an elongated light-emitting diode arrangement (11) accommodated in a recess (9) within an outer peripheral contour (24) of the light guide (2), which is designed to emit light into an interior space (12) formed within the outer peripheral contour (24) of the light guide (2), wherein the light guide (2) is provided on a partial region of the outer peripheral contour (24) with a device (13) reflecting light into the interior space (12) of the light guide (2) and the light guide (2) has at least one light-emitting surface (16) on the outer peripheral contour (24), characterized in that the light-emitting surface (16) is arranged at an angle (α) to the vertical axis (H) of the light guide (2) in a cross-sectional view of the light guide (2) and the device (13) on the outer peripheral contour (24) of the light guide (2) with the exception of the at least one light emitting surface (16) and the recess (9).

Description

The present invention relates to a lamp with an elongated light guide having a vertical axis and a longitudinal axis and an elongated light-emitting diode arrangement accommodated in a recess within an outer peripheral contour of the light guide, which is designed to emit light in an interior space formed within the outer peripheral contour of the light guide, wherein the light guide is provided on a partial region of the outer peripheral contour with a device reflecting light into the interior space of the light guide and the light guide has at least one light-emitting surface on the outer peripheral contour, according to the preamble of claim 1.

The invention further relates to a furniture element with a lamp according to the invention.

A known lamp, as described above, can be identified by the DE 20 2011 005 624 U1 described.

Furniture items or furniture elements often have built-in spaces or interiors that are easier for the user to handle when they are illuminated. This is particularly true for drawers, whose interior is easier for the user to use when well lit, for example when sorting or removing objects in or from the interior.

The drawers mentioned as examples have a limited installation space in the vertical axis direction and in the width direction, so that a lamp intended to illuminate the drawer may only require a small installation space and in particular a low installation height, since otherwise the lamp will limit the usable interior space of the drawer or there is a risk that objects stored in the interior of the drawer will collide with the lamp.

Based on this, the present invention is based on the object of creating a light which is designed in particular for illuminating drawers and which does not or only slightly restrict the usable interior space of the drawer and, in addition, enables efficient and homogeneous lighting of the interior. A furniture element provided with the light according to the invention is also to be created.

To solve this problem, the invention has the features specified in claim 1 with regard to the lamp. Advantageous embodiments thereof are described in the further claims. In addition, the invention has the features specified in claim 15 with regard to the furniture element, advantageous embodiments thereof are described in the further claims.

The invention provides a luminaire with an elongated light guide having a vertical axis and a longitudinal axis and an elongated light-emitting diode arrangement accommodated in a recess within an outer peripheral contour of the light guide, which is designed to emit light into an interior space formed within the outer peripheral contour of the light guide, wherein the light guide is provided on a partial region of the outer peripheral contour with a device reflecting light into the interior space of the light guide and the light guide has at least one light-emitting surface on an outer peripheral contour, wherein the light-emitting surface is arranged at an angle to the vertical axis of the light guide in a cross-sectional view of the light guide and the device is arranged on the outer peripheral contour of the light guide with the exception of the at least one light-emitting surface and the recess.

By arranging the light-emitting diode arrangement within a recess in the light guide, it is achieved that the height or overall height or thickness of the lamp viewed in the vertical axis direction of the light guide can be reduced and thus the lamp arranged, for example, on a side wall of a drawer only imperceptibly reduces the width of the drawer available for accommodating objects in the interior of the drawer.

With the luminaire according to the invention, it is achieved that the height or overall height of the luminaire, i.e. the overall height by which the luminaire protrudes into the drawer when the luminaire according to the invention is arranged on a side wall of the drawer in the interior of the said drawer, is preferably in the range of less than four millimetres and preferably the overall height of the luminaire is in the range between three and four millimetres.

By arranging the light, for example, on the top side of a drawer's side wall, the overall height of the drawer's side wall is only slightly increased, so that the drawer can be easily pulled out and pushed back into a piece of furniture without the light arranged on the top of the drawer's side wall colliding with the recess in the piece of furniture, while still achieving homogeneous illumination of the drawer's interior.

According to the invention, the light emitting surface is arranged at an angle to the vertical axis of the light guide in a cross-sectional view of the light guide and the device is arranged on the outer peripheral contour of the light guide with the exception of the at least one light emitting surface and the recess which accommodates the light-emitting diode arrangement.

By arranging the light-emitting surface in a cross-sectional view of the light guide at an angle to the vertical axis of the light guide, it can be achieved that the light coupled into the light guide by the light-emitting diode arrangement over largely the entire length of the light guide in the longitudinal direction of the light guide is specifically radiated into the interior of the furniture element to be illuminated, namely via the light-emitting surface, which extends in particular over the entire length of the light guide along the longitudinal axis of the light guide.

The arrangement of the light on a side surface or side wall or on an upper side of a side surface or side wall of the drawer, which is mentioned merely as an example, ensures that the light coupled into the light guide by the light-emitting diode arrangement is directed into the interior to be illuminated via the light-emitting surface, so that the light-emitting surface performs a light-directing function.

The light-emitting diode arrangement extends in the recess of the light guide largely over the entire axial length of the light guide and thus the light emitted or coupled into the light guide by the light-emitting diode arrangement is coupled into the light guide over largely the entire length of the light guide.

By arranging the device that reflects light into the interior of the light guide on the outer peripheral contour of the light guide in such a way that the device is arranged on the outer contour or outer peripheral contour of the light guide with the exception of the light-emitting surface and the recess, multiple reflections of the light coupled into the light guide by the LED arrangement are achieved, so that the light cannot emerge from the light guide in an undesirable manner at any point on the outer peripheral contour of the light guide, but is only emitted in a targeted manner at the light-emitting surface. In a cross-sectional view of the light guide, this light-emitting surface is arranged at an angle to the vertical axis of the light guide, with the angle being selected according to the area of the interior of the drawer to be illuminated, i.e. the interior of the drawer to be illuminated.

By coupling light from the light-emitting diode arrangement into the light guide not only at one end of the light guide or both end faces of the light guide, but over largely the entire axial or the entire axial length of the light guide, a homogenization of the light coupled into the light guide is achieved, so that the light emitted from the light-emitting surface of the light guide can be radiated into the interior of the object to be illuminated, for example a piece of furniture or a drawer or a drawer, with a homogeneous light distribution. By arranging the light-reflecting device on the outer peripheral contour of the light guide, a further homogenization of the light emerging from the light-emitting surface of the light guide is achieved by the multiple reflection of the light coupled into the light guide at the reflective device.

The angle of the light emitting surface relative to the vertical axis of the light guide is selected such that the interior to be illuminated is homogeneously illuminated by the luminaire according to the invention, so that, for example, hotspots with high luminous intensity in the lighting pattern of the luminaire and dark areas in the lighting pattern of the luminaire can be avoided.

According to a further development of the invention, it is provided that the light-emitting surface extends at least along a partial region of a side surface of the light guide arranged at an angle to the vertical axis of the light guide, which side surface extends in the longitudinal direction of the light guide.

This configuration allows the light to be emitted through a side surface of the light guide in the direction of the room or interior of an example piece of furniture to be illuminated, with the side surface of the light guide being directed towards the interior. The side surface of the light guide can also be designed in the form of an optical lens which extends along the longitudinal direction of the light guide, so that the light emitted from the side surface is emitted into the interior, for example in the direction of the underside or floor surface of the interior, but also in the direction of a side surface or side wall of the piece of furniture to be illuminated opposite the side surface of the light guide. By designing the side surface or the light emitting surface of the light guide in the form of an optical lens, a further homogenization of the light emitted by the light guide and a guidance of the emitted light is achieved.

According to a further development of the invention, it is also provided that the angle changes in the direction of the light-emitting surface. In other words, this means that the angle of the light-emitting surface relative to the vertical axis of the light guide is not constant, but can also change along the direction of the light-emitting surface. This can achieve further homogenization of the light emitted by the light guide or, for example, a concentration of the light emitted by the light guide on an area of the interior that is to be more strongly illuminated, for example an area of the interior that is to be highlighted by means of concentrated or focused lighting. This can, for example, be an area of a floor area of the interior where a special light-optical or lighting-technical effect is to be achieved, for example an area of the floor area or other area provided with an emblem or the like is to be illuminated in a focused manner and thus highlighted.

According to a further development of the invention, it is also provided that the angle along the light-emitting surface has at least one point of discontinuity. In other words, this means that the angle of the light-emitting surface relative to the vertical axis of the light guide does not remain the same, but the angle of the light-emitting surface relative to the vertical axis of the light guide changes abruptly at the point of discontinuity. This can also be used to achieve a lighting effect on the interior space to be illuminated or on the surface to be illuminated.

According to a further development of the invention, it is also provided that the light-emitting surface has at least one section that is designed in the form of an optical lens. However, by designing the light-emitting surface or the section in the form of an optical lens, focused areas of the surface to be illuminated can be illuminated more strongly than other areas, and this can also achieve homogenization of the light emitted by the light guide.

According to a further development of the invention, it is also provided that the recess is designed as a groove extending along the longitudinal axis of the light guide, which is designed to accommodate the light-emitting diode arrangement.

This means that such a groove can be introduced, for example, in a light guide produced using an extrusion process for accommodating the LED arrangement during the manufacture of the light guide. The light guide can be manufactured, for example, using a transparent thermoplastic material, such as polymethyl methacrylate (PMMA), to which plasticizer is added, so that it is also possible to keep the light guide ready in a roll form, which can be cut to the required length at the assembly site, for example a place where pieces of furniture are assembled, and then to arrange a LED arrangement in the groove of the light guide at the assembly site, so that the light can be manufactured or provided in any length at the assembly site. In addition to the material mentioned, the light guide can also be made from other materials, such as polyvinyl chloride or polycarbonate or glass or the like. It is also intended to form the light guide with transparent or translucent materials, such as silicone, polyurethane or acrylonitrile-butadiene-styrene copolymer (ABS).

Since, for example, when the light guide is made of PMMA, the light guide can be cut to the required length at the installation location and a light-emitting diode arrangement in a freely configurable length is also provided by the applicant, the light can be provided at the installation location in a freely configurable length. Predefined segment lengths of the light according to the invention can also be prefabricated and inserted into the furniture at the location of a series production of pieces of furniture.

According to a further development of the invention, it is also provided that the light-emitting diode arrangement is arranged in the recess such that a distance is formed between a head region of the light-emitting diode arrangement and a lower region of the recess in the vertical axis direction of the light guide.

With such a configuration, it is achieved that the LED array can be easily inserted into the recess or groove of the light guide by the user in the manner of a clip connection at the location where the LED array is inserted into the recess or groove, and a head clearance is achieved by the distance provided in the head region of the LED array from the lower region or the base region of the recess, so that the LEDs do not come into contact with the lower region or base of the recess or groove when the LED array is mounted in the recess and thus cannot be damaged.

According to a further development of the invention, it is also provided that the light emitting surface extends along a line at an angle to the vertical axis the partial area is provided with a device that reflects light into the interior of the light guide.

This means that the light-emitting surface is partially closed or mirrored, for example to achieve optical effects, and thus no light is emitted from the light-emitting surface through the closed or mirrored area in the direction of the interior of the area to be illuminated. This can be used, for example, to provide specifically darkened areas on the surface to be illuminated or the interior to be illuminated.

According to a further development of the invention, it is also provided that the light-emitting surface is generally designed to deflect the light passing through the light-emitting surface. This allows the light emitted by the light-emitting surface to be specifically influenced in terms of the direction of radiation, i.e. to be directed. This allows the light to be focused, for example, on specific areas of the surface to be illuminated, while other areas of the surface to be illuminated are homogeneously irradiated or illuminated.

According to a further development of the invention, it is also provided that the light guide has a greater extension in a width direction transverse to the vertical axis than in the vertical axis direction. This creates a flat configuration with a low overall height in the vertical axis direction of the light guide, while the extension of the light guide in the width direction enables an arrangement of the light emitting surface and thus an emission of light from the light emitting surface at such a location or such an area of the interior to be illuminated or the area to be illuminated, with which the desired homogenization of the illumination of the area or the interior is achieved.

According to a further development of the invention, it is also provided that the device reflecting light into the interior of the light guide is designed as a reflective film with a thickness in the range of approximately 50 to approximately 100 micrometers, which is arranged on the outer peripheral contour of the light guide.

The extremely thin configuration of the film contributes to the fact that the lamp according to the invention still has a low overall height and the light coupled into the light guide by the light-emitting diode arrangement is reflected several times by the reflective film into the interior of the light guide until it can be coupled out of the light guide at the light-emitting surface. This achieves a further improvement in the homogenization of the light emitted from the light guide.

According to a further development of the invention, it is also provided that the device reflecting light into the interior of the light guide is designed as a metallization, for example as a metallization layer and in particular as a vapor-deposited metallization layer. This results in multiple reflections of the light coupled into the interior of the light guide by the light-emitting diode arrangement on the reflection surface of the metallization or metallization layer until the light reaches the light-emitting surface of the light guide and is emitted from there homogeneously into the interior or onto the surface of the object to be illuminated, for example a piece of furniture, a cabinet element, a drawer or the like. The design of the device reflecting the light into the interior of the light guide as a metallization or metallization layer has the advantage that an extremely thin layer thickness can be achieved, which is sufficient to reflect the light into the interior of the light guide. The layer thickness can be in the range of 10 to 50 micrometers, for example.

Although a film or a metallization is described above for forming the device that reflects the light into the interior of the light guide, other technologies can also be used to provide the reflective device. For example, a silver coating similar to a mirror can be provided on the outer peripheral contour of the light guide, which has a layer thickness in the range of about 50 to about 100 nanometers in order to realize a high degree of reflection for reflecting the light emitted by the light-emitting diode arrangement into the interior of the light guide.

According to a further development of the invention, it is also provided that the device reflecting light into the interior of the light guide is provided with a decorative device on an outer side facing away from the interior of the light guide.

For example, a film that is metallized towards the interior of the light guide can be provided with a furniture decoration on the area of the outer surface of the film that corresponds to the appearance of the piece of furniture on which the light according to the invention is arranged. The light thus blends harmoniously into the appearance of the piece of furniture and can still homogeneously illuminate the room to be illuminated via the light-emitting surface, for example an interior or an area of the piece of furniture to be illuminated. The decorative device can also be designed in the form of an optical coating on the outer surface of the light guide, which has a layer thickness in the range of about 10 nanometers to several micrometers, for example 20 to 50 micrometers. This optical decorative device ensures that the light guide or the lamp is integrated homogeneously into the receiving surface for the lamp on the piece of furniture to be mentioned, for example, and therefore does not appear optically as a contrast to the receiving surface.

In a further development of the invention, it is also provided that the light-emitting diode arrangement has a light-emitting diode strip arranged in an elongated profile, which has a plurality of light-emitting diodes provided in a longitudinal direction of the light-emitting diode strip and contacting means extending in the longitudinal direction of the light-emitting diode strip are provided on the light-emitting diode strip for supplying the light-emitting diodes with electrical energy and the light-emitting diode strip has a potting compound that at least partially surrounds the light-emitting diodes.

Thus, the light-emitting diode arrangement can be, for example, a prefabricated structural unit provided with a large number of light-emitting diodes arranged in a COB arrangement on a flexible circuit board, which can be inserted into the groove or recess of the light guide in situ, i.e. at the installation location, for example similar to a clip connection, inserted into the groove or recess and secured there. For this purpose, the light-emitting diode arrangement, which can be a flexible light-emitting diode strip, can be cut to a predetermined length at the installation location and inserted into the light guide, which has also been cut to a predetermined length at the installation location.

In this way, a system with a light guide and a light-emitting diode arrangement is created which can be freely assembled according to the length requirements at the installation site and can thus also be adapted to complicated installation situations without it being necessary to deliver prefabricated luminaires in standardized length or segment length to the installation site, but rather the luminaire according to the invention required for the desired lighting purposes can be manufactured and provided on site, i.e. at the installation site, for example by a craftsman who assembles the furniture segments or furniture elements or furniture assemblies to be illuminated at the installation site.

According to the invention, it is also provided that a furniture element is provided with a lamp as explained in detail above.

In the simplest case, the furniture element can be a drawer, which is intended, for example, for the formation of cupboards or kitchen segments or the like.

According to a further development of the invention, it is also provided that the furniture element is provided with a switchable device which is intended to supply the lamp with electrical energy.

The switchable device can, for example, be designed in such a way that it detects an actuation of the furniture element, for example the opening of a drawer that is provided with the light according to the invention, so that the switchable device then automatically switches the supply of electrical energy to the light according to the invention and thus the interior of the drawer is automatically illuminated when the drawer is opened. The switchable device can also switch the supply of electrical energy to the light according to the invention off again after the drawer is closed.

The switchable device can be provided on the furniture element, but it is also provided that the switchable device is an element or component of the lamp according to the invention itself. For example, the lamp can have a sensor that detects an opening and/or closing operation of the furniture element in order to switch the power supply of the lamp on and/or off depending on the operation of the furniture element. Such a sensor can, for example, be integrated into the structure of the light guide, since such a configuration still meets the requirements that the lamp can be arranged or integrated with very little space on the piece of furniture or another object to be illuminated.

According to a further development of the invention, it is also provided that the light is fixed to the furniture element in a material-locking manner, in particular by means of an adhesive connection. For this purpose, the light can be provided with a double-sided adhesive film or a double-sided adhesive tape along its longitudinal extension on the mounting surface, which is, for example, the underside of the light, on the opposite upper side of which a decorative element is provided, so that the protective layer of the adhesive tape or the adhesive film only has to be peeled off, so that the light according to the invention can then be attached to the place of installation. days can be fixed by means of a simple gluing process at the installation site.

Finally, according to the invention, it is also provided that the furniture element has a lamp in which the device of the lamp which reflects light into the interior of the light guide is provided with a decorative device on the outside facing away from the interior of the light guide, which at least largely corresponds to the color and/or surface structure of the color and/or surface structure of the surface of the furniture element.

This configuration results in the furniture element giving the viewer a visual impression that the luminaire is integrated into the structure or construction of the furniture element and therefore does not differ visually from the colour and/or surface structure of the furniture element.

• 1 eine schematische Darstellung einer Querschnittsansicht einer Leuchte nach einer Ausführungsform gemäß der vorliegenden Erfindung;
• 2 eine Querschnittsansicht ähnlich der Darstellung nach 1, welche den Lichtleiter zeigt;
• 3 eine Darstellung ähnlich derjenigen nach 1, welche eine Querschnittsansicht einer Leuchte nach einer weiteren Ausführungsform gemäß der vorliegenden Erfindung zeigt;
• 4 eine schematische Darstellung einer Querschnittsansicht einer Leuchte ähnlich derjenigen nach 3, bei der zwischen der Leuchtdiodenanordnung und einem Bodenbereich einer die Leuchtdiodenanordnung aufnehmenden Nut ein lichter Abstand dargestellt ist;
• 5 eine Darstellung ähnlich derjenigen nach 4, welche eine weitere Ausführungsform einer Leuchte nach der vorliegenden Erfindung zeigt;
• 6 eine Querschnittsansicht einer weiteren Ausführungsform der Leuchte nach der vorliegenden Erfindung;
• 7 eine Querschnittsansicht einer Leuchtdiodenanordnung in der Form eines Leuchtdiodenbandes;
• 8 eine Querschnittsansicht einer weiteren Ausführungsform der Leuchte, bei der ein Teilbereich der Lichtabgabefläche in der Form einer optischen Linse ausgebildet ist;
• 9 eine schematische querschnittliche Darstellung eines Schubkastens mit an einer jeweiligen Seitenwand angeordneter erfindungsgemäßer Leuchten;
• 10 eine schematische querschnittliche Darstellung eines Schubkastens mit an einer Seitenwand an der Oberseite angeordneten erfindungsgemäßen Leuchte; und
• 11 eine perspektivische schematische Darstellung eines Sideboards als Beispiel eines Einrichtungsgegenstands mit zur Erläuterung dargestellten verschiedenen Einbausituationen der erfindungsgemäßen Leuchte.

The invention is explained in more detail below with reference to the drawing. This shows:

• 1 a schematic representation of a cross-sectional view of a luminaire according to an embodiment according to the present invention;
• 2 a cross-sectional view similar to that shown in 1 , which shows the light guide;
• 3 a representation similar to that of 1 which shows a cross-sectional view of a luminaire according to another embodiment according to the present invention;
• 4 a schematic representation of a cross-sectional view of a luminaire similar to that according to 3 , in which a clear distance is shown between the light-emitting diode arrangement and a bottom region of a groove receiving the light-emitting diode arrangement;
• 5 a representation similar to that of 4 , which shows another embodiment of a luminaire according to the present invention;
• 6 a cross-sectional view of another embodiment of the luminaire according to the present invention;
• 7 a cross-sectional view of a light-emitting diode arrangement in the form of a light-emitting diode strip;
• 8 a cross-sectional view of a further embodiment of the luminaire, in which a partial region of the light-emitting surface is designed in the form of an optical lens;
• 9 a schematic cross-sectional representation of a drawer with lights according to the invention arranged on a respective side wall;
• 10 a schematic cross-sectional view of a drawer with a light according to the invention arranged on a side wall at the top; and
• 11 a perspective schematic representation of a sideboard as an example of a piece of furniture with various installation situations of the luminaire according to the invention shown for explanation.

1 the drawing shows a schematic cross-sectional view of a luminaire 1 according to an embodiment of the present invention.

The lamp 1 has an elongated light guide 2, as can be seen from the dashed lines 3 and the dash-dotted line 4, which clearly show a longitudinal extension of the lamp 1 and thus of the light guide 2 and of the light-emitting diode arrangement 11.

1 The drawing also shows a longitudinal axis 5 of the light guide 2 and 4 The drawing shows that the light guide 2 also has a vertical axis H and a width direction B.

The light guide 2 has an upper wall or top wall 6 and a lower wall or bottom wall 7 as well as a side wall 8.

As shown by 1 and 2 As can be seen from the drawing, the light guide has a recess 9 in the area of the cover wall 6, which is designed as a groove 10 and extends along the longitudinal axis 5 of the light guide 2 and serves to accommodate a light-emitting diode arrangement 11, which can be identified, for example, by means of 1 as can be seen in the drawing.

The cross-sectional view of the 7 shows an embodiment of a light-emitting diode arrangement 11, which is also elongated, as can be seen from the dashed lines 3 and the dash-dotted line 4 according to 1 the drawing can be seen. The light-emitting diode arrangement 11 preferably extends along the entire longitudinal direction of the light guide 2 along the longitudinal axis 5 of the light guide 2, so that the light emitted by the light-emitting diode arrangement 11 can be coupled into the interior 12 of the light guide 2 along the entire longitudinal extent of the light guide 2.

The light required to illuminate an inner side or an interior of a piece of furniture is therefore not only coupled into the light guide 2 at one or both end faces of the light guide 2, but can preferably be coupled into it along the entire longitudinal extent in the direction of the longitudinal axis 5 of the light guide 2. The invention also provides that the light is coupled into the interior 12 of the light guide 2 along the longitudinal axis 5 of the light guide in less than the entire longitudinal extent of the light guide 2. In such a case, the light-emitting diode arrangement 11 can have a smaller longitudinal extent in the direction of the longitudinal axis 5 of the light guide 2 than the light guide 2.

As can be seen from the 1 As can be seen from the drawing, the light guide 2 has a device 13 on the outer peripheral contour which reflects light into the interior 12 of the light guide 2 and which can, for example, be designed in the form of a film 14 which is metallized towards the interior 12 and which, due to the metallization, has the function of a mirror coating which reflects the light emitted by the light-emitting diode arrangement 11 into the interior 12 of the light guide 2 back into the interior 12, as can be seen from the plurality of arrows 15 representing the light beam paths in the interior 12.

With the mirror coating, a homogenization of the light emitted by the light-emitting diode arrangement 11 into the interior 12 can be achieved within the interior 12 of the light guide 2.

1 The drawing also shows that the surface 150 of the light guide 2 opposite the side wall 8 in the width direction B is not provided with a light-reflecting device 13 in the form of the film 14, so that the surface 150 serves as a light-emitting surface 16, at which the light reflected several times in the interior 12 of the light guide 2 can emerge from the light guide 2, as can be seen from the schematically illustrated beam paths 17 according to 1 as can be seen in the drawing.

The light from the light emitting surface 16 can be used to illuminate an interior 18 of a piece of furniture in the form of, for example, a drawer 19, as can be seen from 9 and 10 is shown schematically in the drawing.

The 1 The embodiment of the luminaire shown in the drawing has an emitting surface 16 which is inclined at an angle “α” of approximately 28 degrees relative to the axis of the light guide 2.

The angle “α” can be selected depending on the height “A” of the interior space 18 and the width “C” of the interior space 18 of the drawer 19.

At the 1 In the embodiment of the luminaire 1 shown in the drawing, the light guide 2 has a side surface 20 opposite the side wall 8, which functions as a light emitting surface 16.

The side surface 20 extends in the luminaire 1 according to the embodiment according to 1 along the entire longitudinal extension of the light guide 2 in the direction of the longitudinal axis 5, so that the interior 18 of the drawer 19 in the direction of the plane of the drawing of the 9 depth of the drawer 19 with the 9 the drawing can be illuminated homogeneously by the lights 1 shown schematically. The lights 1 are fixed to a respective inner surface 21 of a respective side wall 22 of the drawer 19 by means of an adhesive connection (not shown in detail) and have only a small vertical extension relative to the width C of the interior 18, which means that the usable interior 18 of the drawer 19 is only very slightly restricted by the two lights 1.

Since the two lights 1 are arranged very high up on the respective inner surface 21 in the direction of the height A of the interior space 18, the interior space 18 of the drawer 19 available from the bottom wall 23 of the interior space 18 is only reduced to a very small extent.

2 The drawing shows the light guide 2 in a cross-sectional view with the cross-sectionally rectangular groove 10 in the area of the cover wall 6 in the form of a recess 9, in which the groove 10 is inserted based on the 1 visible light-emitting diode arrangement 11 can be used.

Based on the 2 The light emitting surface 16 is also visible, the light guide 2, as shown in 2 the drawing does not yet have a light-reflecting film 14 on the outer peripheral contour 24, the film 14 can be applied to the outer peripheral contour 24 after the production of the light guide 2, for example by means of an extrusion process, or can also be applied by means of a metallization of the light guide 2, so that the outer peripheral contour 24 of the light guide 2 facing the interior 12 of the light guide 2 is provided with a metallization layer, for example by vapor deposition, on the entire outer peripheral contour with the exception of the light emitting surface 16 and the recess 9, in which cher the light-emitting diode arrangement 11 in the form of, for example, the 7 the light-emitting diode strip 25 shown in the drawing.

3 The drawing shows a representation similar to that of 1 which shows a cross-sectional view of a luminaire 1 according to another embodiment according to the present invention.

At the 3 In the embodiment of the luminaire 1 shown in the drawing, the light emitting surface 16 of the light guide 2 is inclined by an angle of approximately 50 degrees relative to the vertical axis of the light guide 2. This creates a light emitting surface that is more inclined relative to the vertical according to the vertical axis of the light guide 2, which is suitable for illuminating a drawer 19 with a lower internal height in the direction of the height A of the interior 18.

4 The drawing shows another embodiment of the lamp 1, which is similar to the one in 3 the drawing is designed as a lamp 1 and differs from this in that the light-emitting diode arrangement 11 is arranged in the recess 9 such that a distance 27 is realized between the head region 29 of the light-emitting diode arrangement 1 and a lower region 26 of the recess 9 in the vertical axis direction H of the light guide 2, which represents a head clearance 28.

This ensures that the light-emitting diode arrangement11, which is the 7 the drawing can be the LED strip 25, can be inserted into the groove 9 or recess 10 in the opposite direction to the vertical axis H in the manner of a clip connection, in such a way that the LEDs 31 arranged on a flexible board 30, which in 7 which are shown schematically in the drawing and which can be light-emitting diodes in a COB arrangement, are aligned in the direction of the head region 29, thus emitting light into the interior 12 of the light guide 2.

8 The drawing shows that a section 32 of the light emitting surface 16 can be designed in the form of an optical lens 33, so that the light emitting surface 16 is deflected in the area of the optical lens, with which the interior 18 of the drawer 19 can be illuminated accordingly. With the lens 33 it is therefore possible to highlight areas of the interior 18.

The recess 9 formed in the shape of the groove 10 extends along the longitudinal axis of the light guide 2, that is, for example, along the entire longitudinal extension of the light guide 2 in its longitudinal direction or along a partial region of the longitudinal extension of the light guide 2.

5 The drawing shows that the light emitting surface 16 can run along the vertical axis H of the light guide 2 at an angle relative to the vertical axis, which can also change along the light emitting surface 16. In this embodiment, the light emitting surface 16 has a discontinuity point 47. This makes it possible to implement special light-optical functions through the changing angle of the light axis relative to the vertical axis of the light guide 2.

6 the drawing shows that the light-emitting surface 16 can also be shaded along one or more sections 34, for example by means of a film or a mirroring or metallization, in order to reach an area with a shade in the interior 16 of the drawer 19 or another interior or area to be illuminated, for example another piece of furniture.

7 Drawing shows a cross-sectional view of a light-emitting diode arrangement in the form of a light-emitting diode strip 25.

The light-emitting diode strip 25 has an elastically designed base profile 35, which has a channel-shaped receiving space in which a light-emitting diode strip 36 with a plurality of light-emitting diodes 31 provided at a slight distance from one another is arranged.

The LED strip 36 can have a 7 flexible conductor track 30 shown in the drawing and which in 7 The light-emitting diodes 31, which are only shown schematically, can be mounted on the conductor track or circuit board 30 using chip-on-board (COB) technology. With the COB arrangement, it is possible to provide the light-emitting diodes at such a small distance from one another that the light-emitting diodes 31 produce a uniform or homogeneous light for the viewer, with which the interior 18 of the drawer 19 or another piece of furniture can be illuminated homogeneously.

The base profile 35 can be an elastic profile with a trough-shaped or channel-shaped cross-section, which is made, for example, from a thermoplastic elastomer (TPE), in particular a urethane-based thermoplastic elastomer (TPU), or also from a polyvinyl chloride (PVC) material or also from an elastic thermosetting material.

The base profile 35 of the LED strip 25, as shown in 7 The illustrated embodiment has two side walls 37 which are formed in one piece with a bottom wall 38 of the LED strip 25. The 7 The drawing also shows that a bulge 39 is provided on the respective side wall 37, which can be provided in a respective indentation (not shown in more detail) of the groove 9 running in the longitudinal direction of the light guide 2 on the respective side wall of the groove 9, so that the LED strip 25 can be inserted into the groove 9 in the manner of a clip connection. The interior 41 of the base profile 35 can be provided with a casting compound which serves to homogenize the light emitted by the LEDs 31, so that the light which is emitted into the interior 12 of the light guide 2 is already homogenized when it exits the LED strip 25.

The drawing in the form of the figures shows that the light guide 2 has a greater extension in the width direction B transverse to the vertical axis H than in the direction of the vertical axis H. This achieves a flat or low configuration of the light guide 2 and thus of the lamp 1 in the direction of the vertical axis H, so that the width C of the interior 18 of the drawer 19, which is available for accommodating objects in the interior 18, is not limited.

For example, based on 1 The film 14 shown in the drawing of the device reflecting the light into the interior 12 of the light guide 2 has a thickness or strength in the range of about 50 to about 100 micrometers, so that the circumferential dimensions of the light guide 2 are only insignificantly or not at all increased by the film 14.

The device 13 reflecting the light into the interior 12 of the light guide in the form of the foil 14 mentioned, for example, can be attached to the outer contour, i.e. the area which, in the case of the 9 and 10 apparent mounting examples of the lamp 1 according to the invention on the inner surface 21 of the side wall 22 or the upper side 40 of the side wall 22, as can be seen from 10 the drawing is evident, is visible to the viewer or user, can be adapted to the colour and structure of the side wall 22 with the decorative element or the decorative film, so that the lamp 1 is barely visible visually as an object attached to the side wall 22 and is mounted inconspicuously.

9 The drawing shows an embodiment of the arrangement of two lights 1 according to the invention on the respective inner surface 21 of the respective side wall 22 of a drawer 19.

The light emitted by the lights 1, which is shown by the schematic beam paths 42, enters the interior 18 of the drawer 1 and illuminates the interior 18 homogeneously. As can be seen from the illustration of the 9 As can be seen, the available width C of the interior 18 is not limited by the two lights 1, since the lights 1 have a very low overall height, as already explained above, and furthermore the two lights 1 are arranged in the vertical axis direction V of the drawer 19 at the respective upper end of the inner surface 21 of the side wall 22 and thus do not or only insignificantly limit the storage volume of the interior 18, since the interior 18 of a drawer 19 is usually not filled up to the upper edge.

The two lights 1 run in the direction of the depth of the drawer 19, i.e. in the illustration 9 the drawing in the direction of the drawing plane along the entire depth or longitudinal extent of the respective side wall 22 and thus completely illuminate the interior 18 of the drawer 19.

The furniture element in the form of, for example, the drawer 19 can have a schematically shown switchable device 43, which is provided for supplying the respective lamp 1 with electrical energy. In addition, the device 43 can also detect the opening actuation of the drawer 19 and thus switch the electrical energy supply of the two lamps 1 on and off depending on the opening state of the drawer 19.

The respective lamp 1 is fixed to the inner surface 21 of the side wall 22 in the area 44 with an adhesive connection, which can be achieved, for example, by a double-sided adhesive tape 45, which is 9 is shown schematically in the drawing.

10 Finally, the drawing shows a schematic cross-sectional representation of a drawer 19 with a lamp 1 according to the invention arranged on a side wall 22 on the upper side 40.

The 10 The lamp 1 according to the invention shown in the drawing is fixed to the upper side 40 of the side wall 22 by means of an adhesive tape 45 and can be supplied with electrical energy via the switchable device 43, as already explained above. The lamp 1 shown in 10 the arrangement of the inventive The light according to the invention on the upper side 40 of the side wall 22 has the advantage that the interior 18 of the drawer 19 is available up to the upper edge for filling with objects, since the light according to the invention is arranged outside the interior 18 of the drawer 19. In such a configuration, as for example in 10 the drawing, the side wall 22, on the upper side 40 of which the lamp 1 according to the invention is arranged, can also be shorter or less high in the direction of the vertical axis V of the side wall, so that the upper edge 46 of the lamp 1 according to the invention in the vertical axis direction V is flush with the height of the other or opposite side wall 22. The configuration according to 10 The drawing has the advantage that the interior 18 of the drawer 19 can be illuminated with only one lamp 1, the light emitting surface 16 of which can also be designed as an optical lens, so that the interior 18 is homogeneously illuminated. A lamp 1 with an optical lens in the area of the light emitting surface 16 can also be arranged on an inner surface of a side wall, as can be seen from the 9 is evident.

10 The drawing also shows a detailed view of the lamp 1, from which it can be seen that the light emitting surface 16 can also have an optical lens 33, which in the 10 is shown schematically. The interior 18 of the drawer 19 can be very well illuminated with the area of the light emitting surface 16 designed as an optical lens 33.

The above-described 9 and 10 show the respective arrangement of a lamp according to the invention on a drawer as an example of the arrangement of the lamp on a piece of furniture.

11 The drawing shows a perspective schematic representation of a sideboard as an example of a piece of furniture with various installation situations of the luminaire according to the invention shown for explanation.

The sideboard 50 has several drawers 51, the interior of which is to be illuminated. 11 In the installation situation shown, the lights according to the invention intended for illuminating the respective interior space 52 of the sliding element 51 are arranged in the area of the rear wall 53 of the sideboard 50. Due to the small thickness of the respective light 1 of approximately four millimeters, the sliding elements 51 can be pulled out of the sideboard 50 and pushed back in again without the rear wall 54 of the respective sliding element 51 colliding with the light 1.

The 11 The line 56 shown schematically on the upper cover wall 55 of the sideboard 50 shows another possible installation situation of the lamp 1 on the sideboard 50. The sideboard 50 also has a sliding element 51 in the installation space directly below the cover wall 55, which for simplified illustration in the 11 but is not marked.

The arrangement of the respective light 1 for illuminating the respective interior 52 can be selected such that the light 1 illuminates the interior from different positions relative to the interior 52. The light 1 therefore does not have to be arranged in the area of the rear wall 54 of the sideboard 50, but can be arranged at another location on the sideboard 50, for example in the area of the front edge 57 of the cover wall 55, in order to illuminate the interior 52 in the direction of the rear wall 53.

Since the luminaire 1 according to the invention has only very small dimensions in the vertical direction, the sliding element 51 (not shown) can be pushed into the interior of the sideboard 50 below the cover wall 55 relative to the luminaire 1 and pulled out of the interior without there being a risk of the sliding element 51 colliding with the luminaire 1.

Previously known lights have dimensions in the vertical direction that only allow installation in a sideboard or other piece of furniture if they are recessed in the respective receiving space, for example if they are recessed in a groove, which means that the piece of furniture has to be provided with corresponding receiving spaces or grooves, which increases the processing effort and thus the manufacturing costs of the piece of furniture. In order to accommodate the grooves in which the known lights can be used, the receiving surfaces, for example the receiving walls of the piece of furniture, must also be configured accordingly, i.e. have large wall thicknesses, which in turn leads to the weight of the piece of furniture increasing and the material required for manufacturing the piece of furniture increasing. These problems are solved by the light according to the invention, since due to its small dimensions in the vertical direction it does not require any specifically intended installation situations, but can be arranged on existing receiving surfaces, so that otherwise necessary work steps for introducing the grooves into the receiving surfaces can also be avoided.

Although the luminaire according to the invention is intended for installation on a piece of furniture or As explained above, the use of the luminaire according to the invention as a furniture element or furnishing item is possible in a wide range of ways. This is due, among other things, to the fact that the luminaire according to the invention requires only a small amount of installation space, as explained several times above, and can therefore be used to illuminate interior spaces or objects wherever there is little installation space available.

With regard to features of the invention not explained in detail above, express reference is made to the patent claims and the drawings.

List of reference symbols

1

light

2

Light guide

3

line

4

line

5

Longitudinal axis

6

Cover wall

7

Floor wall

8

Side wall

9

Recess

10

Groove

11

LED arrangement

12

Interior

13

Light reflecting device

14

film

15

Light beam path

16

Light emitting surface

17

Light beam path

18

Interior of a piece of furniture

19

Drawer

20

Side surface

21

Inner surface

22

Side wall

23

Floor wall

24

Outer circumference contour

25

LED strip

26

Lower area

27

Distance

28

Head game

29

Head area

30

Board

31

Light-emitting diodes

32

Section

33

optical lens

34

Section of the light emitting surface

35

Basic profile

36

LED strips

37

Side wall

38

Floor wall

39

bulge

40

Top

41

Interior

42

Beam path

43

switchable device

44

Area

45

tape

46

Top edge

47

Discontinuity point

48

Casting compound

50

Sideboard

51

Thrust element

52

Interior

53

Back wall

54

Back wall

55

Cover wall

56

line

57

Front edge

150

Area

H

Vertical axis

B

Width direction

A

Height of the interior

C

Width of the interior

V

Vertical axis direction

α

angle

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 202011005624 U1 [0003]

Claims (19)

Luminaire (1) with an elongated light guide (2) having a vertical axis (H) and a longitudinal axis and an elongated light-emitting diode arrangement (11) accommodated in a recess (9) within an outer peripheral contour (24) of the light guide (2), which is designed to emit light into an interior space (12) formed within the outer peripheral contour (24) of the light guide (2), wherein the light guide (2) is provided on a partial region of the outer peripheral contour (24) with a device (13) reflecting light into the interior space (12) of the light guide (2) and the light guide (2) has at least one light-emitting surface (16) on the outer peripheral contour (24), characterized in that the light-emitting surface (16) is arranged at an angle (α) to the vertical axis (H) of the light guide (2) in a cross-sectional view of the light guide (2) and the device (13) on the outer peripheral contour (24) of the light guide (2) with the exception of the at least one light emitting surface (16) and the recess (9). Lamp (1) after Claim 1 , characterized in that the light-emitting surface (16) extends at least along a partial region of a side surface (20) of the light guide (2) arranged at an angle to the vertical axis (H) of the light guide (2), which side surface extends in the longitudinal direction of the light guide (2). Lamp (1) after Claim 1 or 2 , characterized in that the angle changes in the direction of the light emitting surface (16). Luminaire (1) according to one of the preceding claims, characterized in that the angle along the light-emitting surface (16) has at least one point of discontinuity (47). Luminaire (1) according to one of the preceding claims, characterized in that the light-emitting surface (16) has at least one section (34) which is designed in the form of an optical lens (33). Luminaire (1) according to one of the preceding claims, characterized in that the recess (9) is designed as a groove (10) extending along the longitudinal axis of the light guide (2) and is adapted to receive the light-emitting diode arrangement (11). Luminaire (1) according to one of the preceding claims, characterized in that the light-emitting diode arrangement (11) is arranged in the recess (9) such that a distance is formed between a head region (26) of the light-emitting diode arrangement (11) and a lower region (26) of the recess (9) in the vertical axis direction of the light guide (2). Luminaire (1) according to one of the preceding claims, characterized in that the light-emitting surface (16) is provided with a device (13) reflecting light into the interior of the light guide along a partial region extending at an angle to the vertical axis. Luminaire (1) according to one of the preceding claims, characterized in that the light-emitting surface (16) is designed to deflect the light passing through the light-emitting surface (16). Luminaire (1) according to one of the preceding claims, characterized in that the light guide (2) has a greater extension in a width direction (B) transverse to the vertical axis (H) than in the vertical axis direction. Luminaire (1) according to one of the preceding claims, characterized in that the device (13) reflecting light into the interior (12) of the light guide is designed as a reflective film (14) with a thickness in the range of approximately 50 to approximately 100 micrometers, which is arranged on at least a partial region of the outer peripheral contour (24) of the light guide (2). Luminaire (1) according to one of the preceding claims, characterized in that the device (13) reflecting light into the interior (12) of the light guide (2) is designed as a particularly vapor-deposited metallization layer. Luminaire (1) according to one of the preceding claims, characterized in that the device (13) reflecting light into the interior (12) of the light guide (2) is provided with a decorative device on an outer side facing away from the interior (12) of the light guide (2). Luminaire (1) according to one of the preceding claims, characterized in that the light-emitting diode arrangement (11) has a light-emitting diode strip (36) arranged in an elongated profile (35), which has a plurality of light-emitting diodes (31) provided in a longitudinal direction of the light-emitting diode strip (36), and contacting means extending in the longitudinal direction of the light-emitting diode strip (36) for supplying the light-emitting diodes (31) with electrical energy are provided on the light-emitting diode strip (36), and the light-emitting diode strip (36) has a potting compound (48) which at least partially surrounds the light-emitting diodes (31). Furniture element (19) with a lamp (1) according to one of the preceding claims. Furniture element (19) after Claim 15 , characterized in that the furniture element (19) is provided with a switchable device (43) which is intended to supply the lamp (1) with electrical energy. Furniture element (19) after Claim 16 , characterized in that the device (43) is arranged to detect an opening actuation of the furniture element (19). Furniture element (19) according to one of the Claims 15 until 17 , characterized in that the lamp (1) is fixed to the furniture element (19) in a material-locking manner, in particular by means of an adhesive connection (45). Furniture element (19) according to one of the Claims 15 until 18 , characterized in that the device (13) of the lamp (1) which reflects light into the interior (12) of the light guide (2) is provided on the outer side facing away from the interior (12) of the light guide (2) with a decorative device which, in terms of colour and/or surface structure, at least largely corresponds to the colour and/or surface structure of the surface of the furniture element (19).

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