EP2924333A1 - Modular lighting device - Google Patents

Abstract

A modular luminaire comprises an elongated base profile (10), an LED light source (40) arranged on an outer side of the base profile (10) and a first optical element (50) arranged on the outside. Furthermore, the luminaire comprises an elongated secondary profile (100) which can be attached to the base profile (10) independently of the first optical element (50) and has a second optical element (120), wherein in the assembled state of the secondary profile (100) the first optical element (50) in FIG an interior of the secondary profile (100) is added. This embodiment allows a simple adaptation of the light distribution of the lamp to different needs. In particular, by a different choice and design of the secondary profile and the second optical element both a light distribution with a main radiation direction substantially parallel to a main emission of the LED light source can be achieved, as well as a light distribution with a main radiation direction transverse thereto.

Description

Technical area

The invention relates to a modular luminaire comprising an elongated base profile, an LED light source arranged on an outer side of the base profile and a first optical element likewise arranged on this outer side.

State of the art

LEDs (LEDs) come in addition to applications in the signal and screen technology also more often in lighting applications, eg. B. in the lighting of rooms used. Even with elongated luminaires, such as those often used in corridors, office, industrial and commercial premises, today LEDs are used instead of fluorescent tubes. They are characterized in particular by improved energy efficiency. Due to the point-like nature of the light sources, existing solutions for luminaires that use fluorescent tubes or other known light sources as light sources can not be easily transferred to LED luminaires; the lighting design has to be completely redesigned.

The EP 1 182 396 B1 (Philips) concerns an elongated luminaire with LED light sources. The latter are accommodated in a housing, which also encloses optical means for the light bundling and guiding. The LEDs are mounted on a support member, and the optical means are held between a connected to the housing, in particular glued, holding element and the support element of the LEDs.

The US 2012/250309 A1 (Innovative Lighting) describes elongate luminaires comprising high intensity LEDs, each individual LED light source comprising one of a plurality of lenses to direct their light in a specific direction; By using different lenses specific and precise lighting patterns can be achieved. The luminaire comprises an elongated base made of extruded profile with a framed front and a back. In the extruded profile, several apertures with integrated lenses are interchangeable. At the back fastening clips are attached. Between the extruded profile and the aperture, a PCB is recorded, which carries the LEDs. For each LED, a single lens may be provided, or multiple LEDs are associated with a single lens.

The known solutions are difficult or impossible to adapt to different light distribution requirements. So z. B. due to the respective housing geometry, the light exit surface fixed, in the examples mentioned are essentially flat surfaces transverse to the main emission of the LED light sources. The US 2012/205309 A1 allows an adjustment of the light distribution, but this must be done separately for each LED and is correspondingly expensive, the light is because in functional terms, more a linear arrangement of multiple LED lights as an elongated light.

Presentation of the invention

The object of the invention is to provide a modular elongated light belonging to the technical field mentioned above, whose light distribution can be flexibly and easily adapted.

The solution of the problem is defined by the features of claim 1. According to the invention, the luminaire comprises an elongated secondary profile which can be attached to the base profile independently of the first optical element and has a second optical element, wherein in the assembled state of the secondary profile the first optical element is accommodated in an interior space of the secondary profile.

The luminaire according to the invention has an elongated basic profile, which means that a longitudinal extent of the basic profile is significantly greater than its extent in directions perpendicular thereto. The longitudinal extent is for example at least 6 times, in particular at least 10 times, the greatest extent in a direction perpendicular to the longitudinal extent. The base profile comprises a delimiting wall, whose main inner surfaces adjoin a space mainly enclosed by the base profile, while the outer side of the wall or the base profile designates another main surface of this delimiting wall. An optical element in the sense of the invention is an element which optically influences light rays, i. H. especially distracting, reflecting, breaking and / or scattering.

In addition to its optical functions, the first optical element also protects the underlying LED light source and protects the user from touching current-carrying elements of the light source or an element which comprises the light source or multiple light sources. The secondary profile is independent of the first optical element on the base profile attachable, ie the first optical element is not needed for the mechanical attachment of the secondary profile. In contrast to certain known from the prior art solutions, the attachment of the secondary profile is thus not on the first optical element, but on the base profile, preferably directly on the base profile by the secondary profile and the base profile having mutually cooperating sections. Solutions with an indirect attachment - without the inclusion of the first optical element - are also conceivable.

As shown below, the elongated secondary profile may be identical to or comprise the second optical element. However, secondary profiles are also possible, to which the second optical element can be attached as a separate component.

Like the basic profile, the secondary profile also includes a bounding wall. This encloses a space in which the first optical element is received in the mounted state. "Enclosed" does not mean that the room must be bounded on all sides by the wall. In particular, the end faces transverse to the longitudinal extent of the profile and possibly also one of the longitudinally extending wall surfaces of the secondary profile can be configured open. In particular, the space in the assembled state of the luminaire, together with the wall of the secondary profile, is also delimited by that wall surface of the base profile to which the LED light source, and preferably also the first optical element, are attached.

The inventive design of the lamp, in which in particular the first optical element is received in an interior of the secondary profile, allows easy adaptation of the light distribution to different needs. In particular, can be achieved by a different choice and design of the secondary profile and the second optical element both a light distribution with a main radiation direction substantially parallel to a main emission of the LED light source, for a ceiling or pendant z. B. for downward lighting (floor lighting), as well as a light distribution with a main beam direction transverse thereto, in a ceiling or pendant z. B. for lighting the walls and / or the ceiling.

Moreover, the combination of a suitable first optical element and a suitable second optical element makes it possible to neutralize undesirable color effects produced by dispersion.

In the delivery state, the first optical element can already be arranged on the outside of the base profile, it then protects u. a. the LED light source from mechanical influences or contamination and prevents contact of live parts by the user. The secondary profile with the second optical element is then subsequently attached as desired by the user or the fitter. In order to ensure the protective function by the first optical element, this can be designed so that it can be removed without a special tool or without first removing the built-in lamp from a room element.

Advantageously, at least first secondary profiles, which allow illumination with a main radiation direction parallel to the main emission direction of the LED light source, and second secondary profiles, which allow illumination with a main emission direction essentially perpendicular to the main emission direction of the LED light source, are thus available within the scope of a modular luminaire system ,

Advantageously, the secondary profile can be connected to the basic profile without tools via a latching connection. As a latching connection is understood here a compound in which at least one of the profiles comprises an elastic portion which can engage behind a portion of the other profile. For example, one of the sections is groove-like, the other is a projection, with the groove and projection extending in the longitudinal direction. The elasticity of the section allows a short-term and reversible deformation of the same, so that the profiles can be pushed onto each other until the projection engages in the groove. The sections of the profiles can be designed so that even after snapping a certain tension is present, whereby play between the profiles is avoided and, if necessary, a securing in the longitudinal direction is achieved by frictional forces.

This allows a stable connection between secondary and basic profiles to be created quickly and easily. Locking connections can also be made visually inconspicuous. Preferably, the portions of the base profile and the secondary profile which cooperate in the sense of a latching connection extend essentially over the entire length of the profiles, so that loads to be picked up are best distributed and stresses are avoided. The latching connection is preferably designed so that they can be easily solved if necessary, z. B. by the elastic portions are deformed again until the engaging portion releases the portion of the other profile.

Other connection types are possible. For example, the two profiles can also be screwed together, or on one of the profiles pivotable elements are provided, which can be pivoted into a locking position or in a release position.

Preferably, the base profile comprises a first profile part, on which the LED light source is arranged, and a second profile part, which can be fastened detachably thereto, and which comprises fastening elements for fastening the luminaire to a room element. This allows on the one hand, easy access to the interior of the basic profile, z. B. for mounting, replacing or repairing the components contained therein, for. As power lines, transformers or LED driver. In addition, the second profile part can first separately on the room element, z. As a ceiling or a wall fasten, and directly or indirectly via fasteners (eg., Rope pendulum, support rods or spacers). Only in a second step is then the attachment of the first profile part with the light source on the second profile part. But it is also possible to assemble the basic profile before mounting and then to secure the profile as a whole on the room element.

The profile parts may be formed so that fastening means for fixing the second profile part to the room element after attachment of the first profile part from the outside are no longer visible. At the second profile part a terminal for receiving the on-site power supply is preferably arranged. During or after the attachment of the first profile part, a connection to the further power supply to the LED light sources or their drivers is then created.

Preferably, the second profile part can be connected without tools to the first profile part. Again, a locking connection can be used, and the sections of the profile parts can be designed so that even after snapping a certain voltage is present, whereby play between the profile parts is avoided and, if necessary, a backup in the longitudinal direction is achieved by frictional forces.

This creates a stable connection between the two profile parts quickly and easily. Locking connections can also be made visually inconspicuous. Preferably, the sections of the two profile parts which cooperate in the sense of a latching connection extend essentially over the entire length of the profiles, so that loads to be received are optimally distributed and stresses are avoided.

Other connection types are possible. Thus, the two profile parts, for example, also be screwed together or on one of the profile parts pivotable elements are provided, which can be pivoted into a locking position or in a release position.

Advantageously, a cross section of the first profile part is substantially L-shaped, and a cross section of the second profile part is also substantially L-shaped, so that the luminaire has a substantially rectangular outer shape in the mounted state. This results in a simple and aesthetically satisfactory geometry, the profile parts can also be easily manufactured and with other elements, eg. B. the light sources, equip. The geometry of the L-shaped profile parts is in particular such that the first profile part can be suspended with one of its free ends in the second profile part, after which the first profile part can be pivoted into its position fixed to the second profile part.

Variants with one-piece basic profile are also possible. To attach the basic profile to a room element also connecting elements such. B. brackets are used.

The LED light source preferably comprises a plurality of light emitting diodes arranged along a longitudinal axis of the base profile, and drivers for the light emitting diodes and a power supply to the drivers are arranged on the base profile. The necessities Thus, electrical connections can be made completely at the factory, and the LED drivers and lights can also be pre-assembled.

In a preferred embodiment of the invention, the base profile in cross section has a substantially rectangular outer shape, and the secondary profile has a substantially rectangular outer shape in cross section, wherein a width of the base profile and a width of the secondary profile match, so that the secondary profile on the base profile attach so that side walls of the base profile are aligned with side walls of the secondary profile. This results in an inconspicuous, space-saving and aesthetically pleasing outer shape. The modular character of the luminaire is not recognizable at first.

Other geometries are possible. For example, the walls of the profiles may also have a curved shape, and trapezoidal or parallelogram-shaped as well as three or more quadrangular cross-sectional shapes are possible.

In a first variant of a secondary profile for a luminaire according to the invention, the secondary profile comprises a profile part of opaque material which can be fastened to the base profile and an insert of translucent material which can be fastened to the profile part and forms the second optical element.

The insert serves in particular as a second optical element and influences the light radiation already formed by the first optical element in the desired manner. The profile part, however, serves as a shield and prevents the radiation in a certain area of space. The profile part can be designed in several parts, the use can also perform other functions in addition to its function as an optical element, on the one hand mechanical as part of the structure of the secondary profile, on the other protective functions for elements of the lamp, in particular the first optical element.

Preferably, the insert has a substantially U-shaped cross-section, wherein in the assembled state, the profile part receives two legs of the insert. The legs are therefore covered by the profile part, while the light radiation is emitted through the base of the U-shaped insert. Particularly preferably, the profile part in an extension of the legs extending extension sections. These serve for Glare of the radiated light. The material and the surface of the profile parts can be chosen such that the appearance of the profile parts corresponds to that of the basic profile. It then results in spite of the modular structure, the appearance of a one-piece lamp.

The profile part is formed in this variant in particular in two parts, wherein the two parts are held firmly together in the assembled state by the use and their interaction with the basic profile. Alternatively, the two lateral elements of the profile part are held together, for. B. by webs.

The insert need not necessarily be included in the profile part, but may also be attached to the profile part so that it encloses this partially.

In a second variant of a secondary profile for a lamp according to the invention, the secondary profile comprises a second optical element forming, attachable to the base profile profile part made of translucent material and attachable to the profile part cover made of opaque material. It is not mandatory that the profile part is made entirely of translucent material.

Here, the profile part is the second optical element, while the cover serves as a shield and prevents the radiation in a certain space area. The profile part also has structural or mechanical functions and can - optionally in cooperation with the cover - protective functions for elements of the lamp, in particular take the first optical element.

Preferably, the profile part has a substantially U-shaped cross-section and the cover can be fastened on an outer side of the profile part in such a way that it covers a base of the profile part. Furthermore, the cover preferably comprises extending on both sides in an extension of the base extension sections.

The light radiation is therefore emitted to the outside in the areas of the legs of the profile part. The extension sections are used to glare the radiated light. Other variants of the secondary profile are possible, wherein both the profile part which can be fastened to the base profile and another element (eg an insert or an attachment) have light-permeable areas or are made of a light-permeable material. Other variants in which the secondary profile is formed in one piece are possible.

The first optical element may comprise a lens, in particular a condenser lens. Thus, the light is collimated in the main emission direction, i. H. the light radiation of the point light sources is transformed into a beam having substantially parallel beams covering a light exit surface.

Particularly preferably, the lens is designed as a linear TIR lens, which works with refraction of light and total internal reflection (TIR). However, in contrast to the known rotationally symmetric lenses, it has the form of an extruded, prismatic profile of translucent and refractive material.

The first optical element may comprise a beam splitter. With its help, the light emitted by the LED light source light can be divided into several sub-beams, which can then be used in particular for illuminating different areas of space. The beam splitter can, in addition to its beam-splitting, also have a collimating function similar to the convergent lens.

The beam splitter preferably divides light radiation which is emitted by the LED light source with a main emission direction into at least a first partial beam and a second partial beam, wherein a main radiation direction of the first partial beam and a main emission direction of the second partial beam enclose and enclose an angle of at least 100 ° The angle of the main beam direction of the first sub-beam and an angle of the main beam direction of the second sub-beam of the main emission of the LED light source are each at least 50 °.

Due to the beam splitter can thus illuminate surfaces in different directions without multiple LED light sources or multiple rows of LED light sources are needed.

In particular, the main beam directions of the first sub-beam and the second sub-beam are oriented substantially perpendicular to the main emission direction of the LED light source and opposite to each other. This means that an angle between the first partial beam or the second partial beam on the one hand and the main radiation direction on the other hand is 90 ° (with tolerances in the range of 85-95 °), while the angle enclosed by the two partial beams is 180 ° (with tolerances 175 °). 185 °).

With a downwardly directed main emission direction of a ceiling or pendant luminaire, this geometry makes it possible to direct the radiation onto the longitudinal walls of the secondary profile on both sides, so that wall or ceiling regions can be illuminated, depending on the configuration of the second optical element.

In addition to lenses and beam splitters, other first and second optical elements, for. As diffusers or reflectors, can be used.

The second optical element used in combination with the converging lens has, in particular, an expanding or focusing effect, so that the bundled light radiation is distributed in a specific spatial area. Thus, the second optical element may have a geometry by which parallel incident light radiation in a plane transverse to the longitudinal direction of the profiles is widened by a certain angle to the outside (eg, both sides 20 ° or 40 ° on both sides), asymmetric designs are possible ,

In combination with the beam splitter, the light radiation can likewise be widened due to the second optical element, so that, for example, a wall and a ceiling area, a wall and a floor area or both ceiling and wall as well as floor are illuminated simultaneously.

The first optical element thus determines in particular the main beam direction or main beam directions, while the second optical element generates the desired light distribution in the main beam direction or in the main beam directions.

By the combination of a suitable first optical element and a suitable second optical element can be as mentioned undesirable, by dispersion neutralize generated color effects. If the first optical element serves to collimate the light radiation generated by the LED light sources, color fringes are typically produced. Now, if a second optical element is used, which distributes the incoming, collimated light radiation substantially independent of the position of an incoming light beam in a certain angular range, the color fringes disappear again, even if optical elements made of transparent material are used.

Both the first optical element and the second optical element are preferably designed as prismatic bodies, that is, have the same cross-section along their entire length. They extend in particular over the entire length of the basic profile and thus influence the light of a plurality of LED light sources. The optical elements are therefore easy to manufacture and no specific geometry is required for individual light sources. Due to the cost-effective production, it is readily possible to produce specific optical elements for a specific desired light distribution, for example, individually according to customer requirements.

From the following detailed description and the totality of the claims, further advantageous embodiments and feature combinations of the invention result.

Brief description of the drawings

Fig. 1

Eine Explosionszeichnung einer erfindungsgemässen modularen Leuchte mit einer ersten Variante eines Sekundärprofils;

Fig. 2A

ein Schrägbild der modularen Leuchte;

Fig. 2B

einen Querschnitt durch die modulare Leuchte in einer Ebene quer zu deren Längsachse;

Fig. 2C

einen Ausschnitt aus der Figur 2B im Detail;

Fig. 3A

ein Schrägbild der modularen Leuchte mit einer zweiten Variante eines Sekundärprofils;

Fig. 3B

einen Querschnitt durch die modulare Leuchte in einer Ebene quer zu deren Längsachse;

Fig. 3C

einen Ausschnitt aus der Figur 3B im Detail;

Fig. 4A

ein Schrägbild der modularen Leuchte mit einer dritten Variante eines Sekundärprofils;

Fig. 4B

einen Querschnitt durch die modulare Leuchte in einer Ebene quer zu deren Längsachse; und

Fig. 4C

einen Ausschnitt aus der Figur 4B im Detail.

The drawings used to explain the embodiment show:

Fig. 1

An exploded view of a modular luminaire according to the invention with a first variant of a secondary profile;

Fig. 2A

an oblique view of the modular luminaire;

Fig. 2B

a cross section through the modular lamp in a plane transverse to its longitudinal axis;

Fig. 2C

a section of the FIG. 2B in detail;

Fig. 3A

an oblique view of the modular lamp with a second variant of a secondary profile;

Fig. 3B

a cross section through the modular lamp in a plane transverse to its longitudinal axis;

Fig. 3C

a section of the FIG. 3B in detail;

Fig. 4A

an oblique view of the modular lamp with a third variant of a secondary profile;

Fig. 4B

a cross section through the modular lamp in a plane transverse to its longitudinal axis; and

Fig. 4C

a section of the FIG. 4B in detail.

Basically, the same parts are provided with the same reference numerals in the figures.

Ways to carry out the invention

The FIG. 1 shows an exploded view of a modular luminaire according to the invention with a first variant of a secondary profile.

The luminaire comprises a base profile 10, which is composed of a first L-shaped profile part 20 and a second L-shaped profile part 30. On the first profile part 20, a known insert 40 is arranged with LED lights. Furthermore, a first optical element 50, in the example shown, a converging lens 51, attached to the first profile part 20. Finally, a secondary profile 100 is fastened to the first profile part 20 of the base profile 10, which in the example shown is composed of a profile part 110 with two lateral profile elements 111, 112 and an optical insert 120 mechanically connecting them.

The L-shaped profile parts 20, 30 of the base profile 10 and the lateral profile elements 111, 112 are extruded, substantially opaque aluminum profiles. The first optical element 50, so the Conveying lens 51, and the optical insert 120 of the secondary profile 100 are made of PMMA and are translucent. All of the aforementioned elements are elongated and have along their longitudinal extent a substantially constant cross section, ie they are substantially prismatic. In the figures, in each case only a section of limited length, usually the length of the elements should be at least 6 times, usually at least 10 times, the maximum extent in the transverse direction.

The FIG. 2A shows an oblique view of the modular lamp, the FIG. 2B a cross section through the modular lamp in a plane transverse to its longitudinal axis. In the Figure 2C is the section A from the FIG. 2B reproduced in detail. The first L-shaped profile part 20 comprises a first wall which forms the underside 21 of the profile part 20 and a side wall 22 extending 90 ° to the first wall. The width of the first wall and the height of the side wall 22 are substantially the same, so that the Both walls form an L-shaped profile with two equal-length legs. The side wall 22 has a substantially planar outer surface, which merges at the upper, free end in a along the entire side wall 22 extending connecting groove 22a. The connecting groove 22a is formed between a flange standing vertically inwardly from the inside of the side wall 22, which at its end merges into a portion bent over in the direction of the free edge of the side wall 22 and the side wall 22 which is bent inwardly along its free edge Section includes.

The first wall, which forms the underside 21 of the profile part 20, has a more complex geometry. On its lower side facing away from the side wall 22, four fastening grooves are formed, namely two outer fastening grooves 21a, 21b and two inner fastening grooves 21c, 21d. The outer fastening grooves 21a, 21b are formed between the first wall extending perpendicularly inwards from the side wall 22 and an inwardly directed flange at the lower end of the side wall 22 or by an analogous geometry in the region of the free end of the first wall. In this area, a protrusion 21e with a substantially semicircular profile is also formed in the extension of the first wall. The inner mounting grooves 21c, 21d are formed by correspondingly shaped recesses on the underside of the first wall educated. It is common to the fastening grooves 21a... D that an undercut is formed in a direction perpendicular to the underside 21.

Between the inner fastening grooves 21c, 21d, a recess 21f having a rectangular cross section is formed. On the lower side 21 opposite upper side of the first wall, two L-shaped ribs 21 g are further formed.

The second L-shaped profile part 30 consists of a first wall, which forms the upper side 31 of the profile part 30, and one with an angle of about 88 ° to the first wall extending side wall 32. The width of the first wall and the height of the side wall 32nd are substantially the same, so that the two walls form an L-shaped profile with two equal-length legs. The side wall 32 has a substantially planar outer surface. In the region of its lower end it has an inwardly directed, a flat surface forming flange 32a and a spaced below, d. H. in the direction of the free end of the side wall 32, arranged elevation 32b. Between the flange 32a and the elevation 32b so a trough-shaped recess 32c is formed.

In the first wall, which forms the upper side 31 of the profile part 30, a hat profile 31a, 31b is formed both on the upper side 31 and on the opposite lower side. Both hat profiles 31a, 31b have a rectangular cross-section. At the free end, the upper side 31 of the profile part 30 merges into a downwardly bent and thickened section 31c.

The two L-shaped profile parts 20, 30 can be assembled by a latching connection without tools together. For this purpose, the thickened portion 31c of the second profile part 30 is inserted into the connecting groove 22a of the side wall 22 of the first profile part 20, wherein the two profile parts 20, 30 are in a pivoted about the longitudinal axis position. Subsequently, the profile parts 20, 30 are pivoted relative to each other until the side wall 32 of the second profile part 30, the free end of the bottom 21 of the first profile part 20 contacted. By slight pressure on the second profile part 30, the elevation 21 e of the first profile part 20 snaps into the recess 32c of the second profile part 30. Due to the geometry of the profile parts 20, 30, Namely, the interaction of the flange 32 a of the second profile part 30 with a corresponding mating surface of the bottom 21 of the first profile part 20 and the elevation 21 e at the free end of the bottom 21 with the recess 32 c in the side surface 32 of the second profile part 30 and the resulting bias due to in the unattached state 88 ° amount angle between the top 31 and the side wall 32 of the second profile part 30, results in a stable and play-free connection. Together, the two profile parts 20, 30 form a basic profile 10 with a substantially square cross-section.

If necessary, the two profile parts 20, 30 of the base section 10 can be separated again by screwing in the threaded pins 11. The threaded pins 11 are accessible from the outside, even if the longitudinal ends of the base profile 10 are closed. When screwing in, they act on the flange 32a of the first profile part 30 and press it upwards until the elevation 32b of the second profile part 30 moves beyond the elevation 21e of the first profile part 20 and the connection between the two profile parts 20, 30 is released.

In the recess 21 f of the first L-shaped profile part 20 of the insert 40 is glued with a plurality of along the longitudinal axis arranged LED lights. In addition to the actual light sources, it also comprises, in a manner known per se, the current conduction between the individual light sources. The power supply with terminals and driver electronics is housed within the base profile 10, the corresponding elements are screwed in the channel formed by the L-shaped ribs 21g. The power supply to the insert 40 is effected by a connection cable, which is guided through an opening in the bottom 21 of the first profile part 20. A base profile 10 can accommodate a plurality of inserts 40, wherein current-carrying elements of adjacent inserts 40 can be connected to one another, so that only one supply line from the interior of the base profile 10 is required on its underside. The first profile part 20 acts as a heat sink for the insert 40.

At the inner fastening grooves 21 c, 21 d, the converging lens 51 forming the first optical element 50 is fastened via a latching connection. The condenser lens 51 includes a main part 51a having a light entrance surface 51b and a substantially plane Light exit surface 51c and arranged at the lateral ends of the light exit surface 51c mounting tabs 51 d, 51 e, which extend from the light exit surface 51 c to the rear, towards the light entrance surface 51 b and beyond. The fastening straps 51d, 51e each have near their free end on the facing inner sides a recess which is bounded at the front, the free end of the respective fastening tab 51d, 51e, the end of a sharp paragraph. For fixing the condenser lens 51, this can be pushed onto the underside 21 of the first profile part 20, wherein the fastening tabs 51 d, 51 e are slightly pushed outwards until the boundaries of the inner mounting grooves 21 c, 21 d behind the heels of the attachment tabs 51 d, 51 e snap. The converging lens 51 is then securely held on the base profile 10. The geometry of the condenser lens 51 can be chosen so that it can no longer be easily detached in a direction perpendicular to the longitudinal axis of the first profile member 20, but that it must be pushed along the longitudinal axis. This prevents removal of the condenser lens 51 in most cases when the luminaire is once mounted on a wall or ceiling. Accordingly, the protection of the light source and any current-carrying elements of the insert 40 is ensured.

The light entry surface 51b of the condenser lens 51 has an outer conical region and an inner conical region, wherein the inner conical region is set back by a shoulder opposite to the outer conical region, so that a central concave region results. It turns out in the FIG. 2B sketched beam path: The light radiation emitted by an LED light source strikes primarily on the inner conical region or the slightly outwardly inclined shoulder surfaces. The light rays impinging on the inner conical region are collimated in a conventional manner due to the convex cross section of the condenser lens 51 and emerge therefrom substantially perpendicularly to the light exit surface 51c. The light rays which occur on the shoulder surfaces are first refracted upon entering the condenser lens 51, then totally reflected on the outer conical surface. The resulting light beams are approximately parallel and perpendicular to the light exit surface 51c, thus leaving the light exit surface 51c without significant refraction. The condenser lens 51, which is the first optical element 50 forms, thus collimating the rays of the substantially point-shaped LED light source and distributes them to a desired area.

The secondary profile 100 fastened to the base profile 10 comprises two profile elements 111, 112 formed in mirror image with respect to one another. At their upper end, these have an outwardly directed rail-like elevation 111a, 112a. On the opposite inner side, a receiving groove 111b, 112b with a substantially rectangular cross section is formed in the case of both profile elements 111, 112. An extension portion 111 c, 112 c protrudes beyond the lower end of the receiving groove 111 b, 112 b.

Sides 120a, 120b of the substantially U-shaped insert 120 are fittingly received in the receiving grooves 111b, 112b. The two side parts 120a, 120b are flat elements of rectangular cross-section, near their lower end they are connected together by a base part 120c. The base part 120c has a flat light exit surface on the side opposite the side parts 120a, 120b, whereas the light entry surface has a structure with wave-like elevations. As a result, beams incident in parallel are partially deflected outwards, resulting in an expanded light emission. Depending on the specific geometry, different emission angles can be achieved, for example ± 20 ° or ± 40 °. The base part 120c of the insert 120 as the second optical element thus expands the light collimated by the first optical element 50 into a desired angular range and thus creates the desired light distribution. Because light arrives at a certain illuminated location, which has been deflected by several of the wave-like elevations, color fringes, which at best arise due to the dispersion in the condenser lens 51, are distributed on the illuminated area, so that they are no longer present in the finally radiated light.

Inwardly directed flanges 120d, 120e are integrally formed on the side parts 120a, 120b parallel to the light entry surface, so that between them and the light entry surface of the base part 120c, if required, a filter foil, e.g. B. a color filter sheet can be inserted.

The two side parts 120a, 120b are mechanically fastened to one another by the U-shaped insert 120. Due to the elasticity of the PMMA material of the insert 120, the free ends of the side parts 120a, 120b can be easily moved inwards, so that the secondary profile 100 can be inserted from below into the outer fastening grooves 21a, 21b of the base profile 10, wherein the rail-like Elevations 111 a, 112 a engage in the outer mounting grooves 21 a, 21 b. The secondary profile 100 can be detached from the base profile 10 again by the side parts 120a, 120b are pressed on both sides inwards at its upper end until the secondary profile 100 can be pulled downwards.

The in the FIGS. 1 and 2 shown light can be used in particular as a ceiling and pendant lamp. The attachment is preferably carried out with the aid of the outer hat profile 31a. In this fasteners can be introduced and braced against the profile. The fasteners may for example be attached to spacers on the ceiling or held on Seilzugpendeln. The illustrated luminaire produces a cone of light which extends substantially over the entire length of the base profile 10 and the secondary profile 100 and laterally illuminates the space in said angular range, depending on the selected insert 120 of the secondary profile 100. The extension sections 111c, 112c of the profile elements 111, 112 prevent a glare effect in a flat plan view of the light exit surface of the base portion 120c of the insert 120th

Several of the luminaires shown can be coupled together in the longitudinal direction without spacing. For this purpose, the inner hat profile 31b of the two base profiles to be joined together can be used by inserting a corresponding connection plate into both profiles and thus ensuring that the basic profiles are oriented in alignment. Furthermore, it is also possible in the context of suitable connecting means to brace the connecting plate in the hat profiles, so that an axial securing of the basic profiles of the two lamps to be coupled is achieved. The faces of the lamp or the respective outermost lights when multiple lights are coupled together, is advantageously completed by a cover. Especially if the face directly to another element such. B. adjacent a building wall, can also be dispensed with such a cover.

The FIG. 3A shows an oblique view of the modular lamp with a second variant of a secondary profile, the FIG. 3B a cross section through the modular lamp in a plane transverse to its longitudinal axis. In the FIG. 3C is the section A from the FIG. 3B reproduced in detail. The luminaire comprises the same basic profile 10 including the insert 40 with the LED lights. In contrast to the lamp according to FIGS. 1 and 2 but now instead of the convergent lens a beam splitter element 251 as the first optical element 250 at the inner mounting grooves 21 c, 21 d of the base profile 10 is engaged.

The beam splitter element 251 comprises a main part 251 a with a rear light entry surface 251 b, a front reflection surface 251 c, lateral light exit surfaces 251 d, 251 e and fastening tabs 251 f, 251 g arranged laterally on the light entry surface 251 b, which projects backwards over the rearmost section of the light entry surface 251 b extend beyond. The fastening tabs 251f, 251g have near their free end in each case a recess, which is bounded at the front, the free end of the respective fastening tab 251f, 251g, the end of a sharp paragraph. For attachment of the beam splitter element 251, this can be pushed onto the underside 21 of the first profile part 20, wherein the mounting tabs 251f, 251g are pressed slightly outwards until the boundaries of the inner mounting grooves 22c, 22d snap behind the heels of the mounting tabs 251f, 251g. The beam splitter element 251 is then securely held on the base profile 10. The geometry of the beam splitter element 51 can be chosen so that it can no longer be solved easily in a direction perpendicular to the longitudinal axis of the base profile 10, but that it must be pushed along the longitudinal axis. This in most cases prevents removal of the beam splitter element 251 once the luminaire is mounted to a wall or ceiling. Accordingly, the protection of the light source and any current-carrying elements of the insert 40 is ensured.

The light entry surface 251 b comprises in cross section a central, slightly convex part, on both sides outside then in the direction of the front reflection surface 251c conically widening part and a shoulder part, which extends away from the outer ends of the conically widening part away from the reflection surface 251c directed substantially perpendicular to the central part of the light entry surface 251b. The reflection surface 251c comprises two slightly convex partial surfaces, which meet in a plane of symmetry of the beam splitter element 251 and extend obliquely forward from this point. The lateral light exit surfaces 251d, 251e, starting from the outer ends of the convex partial surfaces, in turn extend rearwardly away from the reflection surface 251c substantially perpendicular to the central part of the light entry surface 251b. In a front part of the light exit surfaces 251d, 251e are substantially flat, in a rear part joins a serrated recess which has the shape of a rounded sawtooth, wherein a front edge perpendicular to the front part of the light exit surface 251d, 251e extends inwardly and a rear flank connects at an angle of about 45 °.

It turns out in the FIGS. 3B, 3C sketched beam path: The light emitted by an LED light source light radiation strikes on the one hand on the central, slightly convex part and on the other on the shoulder portion of the light entry surface 251b. The light radiation coupled into the beam splitter element 251 via the central part is totally reflected at the reflection surface 251c, whereby depending on the position a reflection takes place on the first or on the second part surface of the reflection surface 251c and the radiation correspondingly in two different directions perpendicular to an axis of symmetry of the Beam splitter element 251 are deflected. At the same time, due to the convex outer surfaces of the beam splitter element 251, the light beams are collimated, ie the beams emerging from the front part of the lateral light exit surfaces 251d, 251e are substantially parallel to one another. The portion of the light radiation which is coupled into the beam splitter element 251 in the shoulder part of the light entry surface 251b experiences no total reflection and emerges from the beam splitter element 251 in the region of the trailing edge of the serrated recess. Due to the geometry of the recess, the exiting light radiation is substantially parallel to the other radiation, which has undergone a total reflection in the beam splitter element 251. The beam splitter element 251 constituting the first optical element 250 splits the beams the substantially point-shaped LED light source, it deflects outwards by 90 ° with respect to a main emission direction of the light source, collimates the beams and distributes them to two desired surfaces.

The attached to the base profile 10 secondary profile 200 comprises a U-shaped profile 210 made of a translucent material, namely PMMA and a front side on the profile 210 deferred cover 230 made of opaque material, namely aluminum. The U-shaped profile 210 comprises two side parts 210a, 210b as legs and a base part 210c, which connects the two side parts 210a, 210b. The side parts 210a, 210b and the base part 210c each have a substantially rectangular cross section, and adjacent elements each enclose an angle of 90 °. At their free end, the side parts 210a, 210b have an outwardly directed rail-like elevation. In addition, in the area of the free end, a nose extending parallel to the respective side wall is formed, in alignment with these lugs, furthermore, two lugs on the inside of the base part 210c. If necessary, filter sheets, for example, can be placed between the tabs and the respective side part 210a, 210b. B. color filter sheets insert.

The outer surfaces of the side parts 210a, 210b and the base part 210c and the inside of the base part 210c are flat, on the inside of the side parts 210a, 210b, however, sawtooth-like elevations are formed. These divert a portion of the radiation incident perpendicular to the respective side part 210a, 210b, so that an expansion of the emitted light results. The perpendicular to the side part flanks of the sawtooth-like elevations are in each case arranged in front of the obliquely rearwardly extending flanks, so that the deflection of the light rays primarily in a forward direction, d. H. away from the base profile 10 takes place. Because light arrives at a certain illuminated location, which has been deflected by several of the sawtooth elevations, color fringes, which at best arise due to the dispersion in the beam splitter element 251, are distributed on the illuminated area, so that they are no longer present in the finally radiated light.

Near the transition to the base part 210c, the side parts 210a, 210b have on their outer side a groove with a rectangular cross section. The cover 230 has a corresponding nose 230a, so that it can be postponed fit on the base part 210c of the U-shaped profile 210. The cover 230 protrudes in the assembled state beyond the outer surfaces of the side parts 210a, 210b.

The side surfaces 210a, 210b of the U-shaped profile 210 as a second optical element thus extend the light deflected and collimated by the first optical element 250 into a desired angular range and thus create the desired light distribution. The in the FIG. 3 shown light can be used in particular as a wall light. Again, the attachment is preferably carried out using the outer hat profile 31 a. In this fasteners can be introduced and braced against the profile. The fasteners may be secured to the wall, for example via spacers. The illustrated luminaire produces a cone of light which extends substantially over the entire length of the base profile 10 and the secondary profile 200 and in wall mounting both the ceiling or floor area located immediately above and below the secondary profile and with respect to the wall in front of this area lying surfaces illuminated. The sections of the cover 230 projecting beyond the side parts prevent a glare effect in a flat plan view on the outer surfaces of the side parts 210a, 210b.

The FIG. 4A shows an oblique view of the modular lamp with a third variant of a secondary profile, the FIG. 4B a cross section through the modular lamp in a plane transverse to its longitudinal axis. In the FIG. 4C is the section A from the FIG. 4B reproduced in detail. With the exception of the U-shaped profile 310 of the secondary profile 300 are the elements used, namely the base profile 10, the insert 40 with the LED lights, the beam splitter element 251 as the first optical element and the cover 230, identical to that in connection with the FIG. 3 described lamp. A new description is therefore omitted here.

The attached to the base profile 10 secondary profile 300 according to the third variant comprises a U-shaped profile 310 of a translucent material, namely PMMA and turn the front side on the profile 310 deferred cover 230 made of opaque material, namely aluminum. The U-shaped profile 310 comprises two side parts 310a, 310b as legs and a base part 310c, which are the two Side parts 310a, 310b connects. The side parts 310a, 310b and the base part 310c each have a substantially rectangular cross-section, and adjacent elements each enclose an angle of 90 °. At their free end, the side parts 310a, 310b have an outwardly directed rail-like elevation. In addition, in the area of the free end, a nose extending parallel to the respective side wall is formed, in alignment with these lugs, furthermore, two lugs on the inside of the base part 310c. If necessary, filter foils, for example, can be placed between the noses and the respective side part 310a, 310b. B. color filter sheets insert.

The outer and inner surfaces of the side parts 310a, 310b and the base part 310c are largely planar. On the inside of the side parts 310a, 310b, however, a nose-like recess is formed in each case. Their cross section, starting from the rear, free end of the side parts 310a, 310b, initially rises gradually to a maximum depth, where the recess is closed off by a flat wall, which is substantially perpendicular to the outer surface of the respective side part 310a, 310b. The recesses have the consequence that, due to the corresponding refraction of light, a part of the radiation striking the respective side part 310a, 310b obliquely to the rear, d. H. in the direction of the basic profile 10, is deflected. This results in a corresponding expansion of the radiated light.

Near the transition to the base part 310c, the side parts 310a, 310b have on their outer side a groove with a rectangular cross section. The cover 230 has a corresponding nose 230a, so that it can be pushed onto the base part 310c of the U-shaped profile 310. The cover 230 protrudes in the assembled state beyond the outer surfaces of the side parts 310a, 310b.

The side surfaces 310a, 310b of the U-shaped profile 310 as a second optical element thus extend the light deflected and collimated by the first optical element 250 into a desired angular range and thus create the desired light distribution. The in the FIG. 4 shown light can be used in particular as a wall lamp. Again, the attachment is preferably carried out using the outer hat profile 31 a. In this fasteners can be introduced and braced against the profile. The fasteners can be attached to the wall, for example via spacers be. The illustrated luminaire produces a cone of light which extends substantially over the entire length of the base profile 10 and the secondary profile 300 and illuminates both the ceiling or floor area directly above or below the secondary profile and the wall area surrounding the luminaire during wall mounting , The sections of the cover 230 projecting beyond the side parts prevent a glare effect in a flat plan view on the outer surfaces of the side parts 310a, 310b.

The invention is not limited to the illustrated embodiments. In particular, the geometry of the individual elements including the arrangement of translucent and opaque areas can be changed in many ways. Furthermore, due to the modular construction, other combinations of the described elements or with further elements readily possible.

In summary, it should be noted that the invention provides a modular elongated luminaire whose light distribution can be flexibly and easily adapted.

Claims (15)

Modular luminaire, comprising a) an elongated base profile; b) an LED light source arranged on an outside of the base profile; and c) a first optical element arranged on the outside;
marked by d) an elongate secondary profile which can be attached to the base profile independently of the first optical element and has a second optical element, wherein in the assembled state of the secondary profile, the first optical element is received in an interior of the secondary profile. Luminaire according to claim 1, characterized in that the secondary profile via a latching connection without tools with the basic profile is connectable. Luminaire according to claim 1 or 2, characterized in that the base profile comprises a first profile part, on which the LED light source is arranged and a detachably securable thereto second profile part, which comprises fastening elements for fastening the lamp to a room element. Luminaire according to claim 3, characterized in that the second profile part is tool-less connectable to the first profile part. Luminaire according to claim 3 or 4, characterized in that a cross section of the first profile part is substantially L-shaped and that a cross section of the second profile part is substantially L-shaped, so that the lamp in the mounted state has a substantially rectangular outer shape. Luminaire according to one of claims 1 to 5, characterized in that the LED light source comprises a plurality of light emitting diodes arranged along a longitudinal axis of the base profile and that drivers for the LEDs and a power supply to the drivers on the base profile are arranged. Luminaire according to one of claims 1 to 6, characterized in that the base profile in cross-section has a substantially rectangular outer shape and that the secondary profile in cross section has a substantially rectangular outer shape, wherein a width of the base profile and a width of the secondary profile match, so that the secondary profile can be attached to the base profile such that side walls of the base profile are aligned with side walls of the secondary profile. Luminaire according to one of claims 1 to 7, characterized in that the secondary profile comprises a fastened to the base profile part of opaque material and the second optical element forming attachable to the profile part insert of translucent material. Luminaire according to claim 8, characterized in that the insert has a substantially U-shaped cross-section, wherein in the assembled state, the profile part receives two legs of the insert and extending in an extension of the legs extending sections comprises. Luminaire according to one of claims 1 to 7, characterized in that the secondary profile comprises a second optical element forming, attachable to the base profile profile part made of translucent material and a fastened to the profile part cover made of opaque material. Luminaire according to claim 10, characterized in that the profile part has a substantially U-shaped cross-section, that the cover on an outer side of the profile part is fastened such that it covers a base of the profile part and that the cover extending on both sides in an extension of the base Extension sections includes. Luminaire according to one of claims 1 to 11, characterized in that the first optical element comprises a lens, in particular a converging lens. Luminaire according to one of claims 1 to 12, characterized in that the first optical element comprises a beam splitter. Luminaire according to claim 13, characterized in that the beam splitter splits light radiation which is emitted by the LED light source with a main emission direction into at least a first sub-beam and a second sub-beam, one main beam direction of the first sub-beam and one main emission direction of the second sub-beam forming an angle of at least 100 ° and at least be an angle of the main beam direction of the first sub-beam and an angle of the main beam direction of the second sub-beam of the main emission of the LED light source at least 50 °. Luminaire according to claim 14, characterized in that the main beam directions of the first sub-beam and the second sub-beam are oriented substantially perpendicular to the main emission of the LED light source and are opposite to each other.

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