EP2747060B1 - Indicator lamp - Google Patents

Indicator lamp Download PDF

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Publication number
EP2747060B1
EP2747060B1 EP13198090.6A EP13198090A EP2747060B1 EP 2747060 B1 EP2747060 B1 EP 2747060B1 EP 13198090 A EP13198090 A EP 13198090A EP 2747060 B1 EP2747060 B1 EP 2747060B1
Authority
EP
European Patent Office
Prior art keywords
indicator lamp
light
guide plate
lamp according
light guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13198090.6A
Other languages
German (de)
French (fr)
Other versions
EP2747060A1 (en
Inventor
Tanja ILIC
Marcel KILGA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2747060A1 publication Critical patent/EP2747060A1/en
Application granted granted Critical
Publication of EP2747060B1 publication Critical patent/EP2747060B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V31/00—Gas-tight or water-tight arrangements
    • F21V31/005—Sealing arrangements therefor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to an indicator lamp with LEDs (LED: light emitting diode), a light guide plate, a frame member and two light exit discs.
  • LED light emitting diode
  • Such a sign lamp in the form of a escape sign light is from the Scriptures DE 20 2006 014 352 U1 known.
  • This known indicator light is characterized by a particularly good accessibility to the interior. However, the resistance of the indicator light is limited.
  • an indicator lamp with a light guide plate into which the light from LEDs is irradiated is known. Furthermore, the lamp has a light exit disc, as well as a frame element. Between the light exit plate and the frame member, a sealing element is arranged.
  • a light signal which has a sealing ring between a housing and a cap.
  • the invention has for its object to provide a corresponding improved indicator light.
  • the light should have a better resistance to environmental influences with particularly good light output properties.
  • an indicator lamp which has LEDs for generating a light, and a light guide plate having a first plan front surface, a rear surface and a, the front surface with the rear surface connecting edge side surface, the LEDs along the side surface are arranged so that the light is coupled into the light guide plate.
  • the direction indicator lamp has a frame element which is arranged around the light guide plate and around the LEDs, and a first light exit disc, which is arranged on a first side of the light guide plate and a second light exit disc, which is arranged on a second side of the light guide plate.
  • the indicator lamp has a sealing element, which is arranged both sealingly between the frame member and the first light exit plate, as well as sealing between the frame member and the second light exit plate.
  • the sealing element On the one hand, a particularly good sealing of the indicator light can be achieved by the sealing element; on the other hand, the light output of the indicator light can be advantageously influenced by the sealing element.
  • the sealing element is configured annularly closed. This makes it possible to achieve a particularly good seal on all sides.
  • the sealing element consists of a rubber material, for example of a thermoplastic elastomer. Further preferably, it is produced in an injection molding process. Further preferably, the sealing element is designed like a profile. In this way, particularly suitable properties of the sealing element can be achieved with simple production.
  • the sealing element has a groove, which is U-shaped in a cross-section, wherein the light guide plate is arranged with its side surface engaging in this groove.
  • the groove on the first side is preferably delimited by a first, upwardly projecting, free U-limb and in this case the design such that the first light-exit disc extends below a first level which passes through the upper boundary of the first free U -Chelfels is fixed. In this way, the frame element can be made particularly narrow.
  • the LEDs are located completely below the first level, it can be achieved that the LEDs are covered by the sealing element during normal viewing of the indicator light and therefore no corresponding points of light can be seen.
  • the first U-leg is shaped such that it has an obliquely falling edge on the first side. This makes it possible to achieve that light can pass from the light guide plate into a lower edge region of the first light exit disk, so that a particularly good edge-side Illumination of the first light exit plate is possible.
  • This peripheral illumination is further supported if the flank has a white and / or a reflective surface.
  • the entire sealing element has a white and / or a reflective surface.
  • the frame member has on the first side a first, upstanding, free support leg disposed on the first side from a lower end portion of the first light exit plate and extending upwardly to a second level extending below the first Levels is located.
  • the frame element can be made particularly narrow or with a particularly small vertical extent.
  • the edge illumination is particularly supported when the flank extends down to the second level or below the second level.
  • the LEDs are preferably arranged above the second level.
  • the sealing element is symmetrically shaped with respect to a plane of symmetry passing through the lightguide plate.
  • the corresponding advantages can also be achieved in an analogous manner on the side of the second light-emitting disk.
  • Fig. 1 shows a sketch of a frontal view of an indicator lamp according to the invention, hereinafter also referred to briefly as a lamp.
  • the directional lamp has a rectangular shape, which is defined by a frame member 7 of the lamp.
  • the frame element 7 is arranged in a vertical plane which, as in FIG Fig. 1 indicated by a coordinate system x, y, z - defined by an xy plane.
  • the indicator light is also suitable for another orientation with respect to the vertical. In such a case, the corresponding directions etc. are to be interpreted accordingly in the present description.
  • the frame member 7 has a lower frame leg 76, an upper frame leg 77, a first frame side leg 78 and a second frame side leg 79, wherein the frame side legs 78, 79 respectively connect the upper frame leg 77 with the lower frame leg 77.
  • the frame element 7 may have, for example, engagement elements 75 for a suspension element, for example a pendulum rod or a chain or the like, on its upper frame limb 77.
  • Fig. 2 shows a perspective sectional view of a lower portion of the sign lamp, wherein the section is placed in an xz plane in a central region of the sign lamp
  • Fig. 3 shows a corresponding sketch of an upper area.
  • the lamp has LEDs 2 for generating a light.
  • the LEDs 2 form the only light source of the lamp.
  • the LEDs 2 can be arranged on a particularly elongated circuit board 21.
  • the luminaire has a light guide plate 3 with a front surface 4 which is planed in the first approximation, a rear surface 5 and a peripheral side surface 6 connecting the front surface 4 with the rear surface 5.
  • the LEDs 2 are arranged along the side surface 6 such that the light generated by the LEDs 2 is coupled into the light guide plate 3.
  • the LEDs 2 extend along the lower frame leg 76th
  • the frame member 7 is arranged around the light guide plate 3 and around the LEDs 2 around.
  • the lamp has a first light exit plate 8, which is arranged on a first side re the light guide plate 3.
  • the first light exit plate 8 is arranged oriented parallel to the light guide plate 3.
  • the lamp has a second light exit plate 9, which is arranged on a second side li of the light guide plate 3.
  • the second side li is directed with respect to the light guide plate 3 of the first side re opposite, thus has in the z-direction and is hereinafter also referred to as "left".
  • the second light exit disk 9 is arranged oriented parallel to the light guide plate 3.
  • the luminaire is designed in such a way that the light generated by the LEDs 2 enters the light guide plate 3 and subsequently leaves the light guide plate 3 at least partially via the front surface 4 and / or the back surface 5 and subsequently the first light exit disc 8 and the second light exit disc, respectively 9 interspersed and finally leaves the light.
  • the first light exit plate 8 and the second light exit plate 9 may be provided with a pictogram, for example, to display an escape route.
  • the lamp has a sealing element 10, which is arranged both sealing between the frame member 7 and the first light exit plate 8, as well as sealing between the frame member 7 and the second light exit plate 9.
  • a sealing member 10 can be achieved that the LEDs 2 in a sealed interior of the lamp are arranged, which can be sealed in particular splash-proof.
  • the protection class IP 42 can be provided for this purpose.
  • the interior can be limited or circumscribed by the sealing element 10, the first light exit disk 8 and the second light exit disk 9.
  • the sealing element 10 is configured annularly closed.
  • it may have four sealing element legs, with a first sealing element leg extending parallel to the lower frame leg 76, a second sealing element leg parallel to the upper frame leg 77, a third sealing element leg parallel to the first frame side leg 78 and a fourth Seal member legs parallel to the second frame side legs 79th
  • the sealing element 10 is made of a rubber material.
  • it may consist of a thermoplastic elastomer.
  • it is produced in an injection molding process.
  • the sealing element 10 is further preferably designed like a profile.
  • Fig. 4 is an enlarged section of Fig. 2 which shows an area around the seal member 10 and the first seal member leg, respectively;
  • Fig. 5 shows a portion of the sealing element 10th
  • the sealing element 10 has a groove 15, which is U-shaped in a cross-section, wherein the light guide plate 3 - as in Fig. 2 shown - is arranged engaging with its side surface 6 in this groove 15. This makes it possible to achieve that the light emitted directly by the LEDs 2, when the luminaire is normally viewed from the outside, of the sealing element 10 is shielded so that around the LEDs 2 around no corresponding points of light can be seen.
  • the board 21 is arranged with the LEDs 2 inserted into the groove 15.
  • a first, upstanding free U-leg 11 extends upwardly to a first level N1 , which is thus defined by an upper boundary of the first U-leg 11.
  • the design is such that the first light exit plate 8 extends below this first level N1 .
  • the frame element 7 or here its lower frame leg 76 can be designed with a particularly small vertical extent or particularly narrow. This is advantageous with respect to the external appearance of the sign lamp.
  • the LEDs 2 are arranged completely below the first level N1 .
  • a corresponding complete shielding of the LEDs 2 by the sealing element 10 can be achieved with normal viewing of the luminaire.
  • the first U-leg 11 of the seal member 10 is formed such that it re on the first side a sloping flank 111 has.
  • the flank 111 encloses an angle ⁇ with a plane defined by the light guide plate 3, which angle is between 10 ° and 85 °, preferably between 20 ° and 70 °.
  • this flank 111 it can be achieved that light which leaves the light guide plate 3 via the front surface 4 can also be incident on the first light exit disc 8 below the first level N1 . In this way, a particularly uniform illumination of the first light exit plate 8 can be effected. Light can thus fall into the lower edge area of the pictogram.
  • This downward edge illumination of the first light exit plate 8 is forced, when the edge 111 is a white and / or a reflective Surface has.
  • the entire sealing element 10 has a white and / or reflective surface.
  • the first U-leg 11 is preferably shaped so that it tapers towards the top. On its second side li, ie toward the board 21, it can have a vertical flank.
  • the frame member 7 and here the lower frame leg 76 preferably on the first side re a first, upstanding, free retaining leg 71 which is disposed on the first side re from a lower end portion of the first light exit plate 8 and after at the top to a second level N2 , which is below the first level N1 .
  • the frame member 7 thus engages with the retaining leg 71, the first light exit plate 8 - with respect to the interior of the lamp - from the outside.
  • the lower frame member 76 can be designed with a particularly small vertical extent; this is advantageous with respect to the external appearance of the luminaire.
  • the sealing element 10 on the first side re next to the edge 111, a further groove 13, in which the first light exit plate 8 is arranged engaging with a lower end portion.
  • the first light exit disc 8 for this purpose has a flange-like projection 81, which engages in the further groove 13.
  • the other groove 13 is on the first side of a re also upwardly extending sealing leg 12 is limited. On the first side of this sealing leg 12 immediately follows the first free retaining leg 71 of the frame member 7 at. As a result, a particularly good sealing of the interior is possible.
  • the luminaire is configured such that the flank 111 extends downwards to the second level N2 or below the second level N2 .
  • the LEDs 2, however, are advantageously arranged above the second level.
  • the lower frame leg 76 preferably extends down to a third level N3, which is located below the second level N2 .
  • the relationship 1 ⁇ 4 * (N 2 -N 3) ⁇ (N 1 -N 2) ⁇ (N 2 -N 3) preferably applies here.
  • the sealing element 10 is preferably designed symmetrically with respect to a plane of symmetry M which passes through the light guide plate 3.
  • the luminaire is designed symmetrically with respect to the frame element 7 and the second light exit plate 9.
  • the frame element 7 and the sealing element 10 are furthermore shaped such that the sealing element 10 can be inserted into the frame element 7 in a form-fitting manner.
  • the frame member 7 for this purpose has two projections 73, 74 and the sealing member 10 has a downwardly facing engagement portion 14 which is positively on the first side re and the second side li of the two projections 73, 74 of the frame member 7 is included.
  • the frame member 7 is preferably made of aluminum.
  • Four corresponding leg profile elements can be combined via corner connectors (scraper springs) to the frame element 7. This makes it possible to effect a particularly suitable contact pressure with respect to the sealing element 10.
  • the LEDs 2 extend along the lower frame leg 76. Accordingly, the terms top, bottom, level, etc. are selected. However, the design may also be such that the LEDs additionally or alternatively extend along the upper frame leg 75 and / or the first frame side leg 78 and / or the second frame side leg 79. The design is formed in this case analogous to the above representation, so that the corresponding direction information etc. are to be reinterpreted accordingly.
  • a particularly homogeneous illumination of the first light exit plate 8 and the second light exit plate 9 can be achieved.
  • a particularly good illumination can be achieved in the edge region.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Description

Die Erfindung betrifft eine Hinweisleuchte mit LEDs (LED: Licht emittierende Diode), einer Lichtleiterplatte, einem Rahmenelement und zwei Lichtaustrittsscheiben.The invention relates to an indicator lamp with LEDs (LED: light emitting diode), a light guide plate, a frame member and two light exit discs.

Eine solche Hinweisleuchte in Form einer Rettungszeichenleuchte ist aus der Schrift DE 20 2006 014 352 U1 bekannt. Diese bekannte Hinweisleuchte zeichnet sich durch eine besonders gute Zugänglichkeit zum Innenraum auf. Allerdings ist die Widerstandsfähigkeit der Hinweisleuchte limitiert.Such a sign lamp in the form of a escape sign light is from the Scriptures DE 20 2006 014 352 U1 known. This known indicator light is characterized by a particularly good accessibility to the interior. However, the resistance of the indicator light is limited.

Aus der JP 2007-041622 A ist eine Hinweisleuchte mit einer Lichtleiterplatte bekannt, in die das Licht von LEDs eingestrahlt wird. Weiterhin weist die Leuchte eine Lichtaustrittsscheibe auf, sowie ein Rahmenelement. Zwischen der Lichtaustrittsscheibe und dem Rahmenelement ist ein Dichtungselement angeordnet.From the JP 2007-041622 A For example, an indicator lamp with a light guide plate into which the light from LEDs is irradiated is known. Furthermore, the lamp has a light exit disc, as well as a frame element. Between the light exit plate and the frame member, a sealing element is arranged.

Aus der US 2012/0169967 A1 ist eine weitere Hinweisleuchte mit LEDs und einer Lichtleiterplatte bekannt. Außerdem weist diese Leuchte zwei Lichtaustrittsscheiben auf.From the US 2012/0169967 A1 is another indicator light with LEDs and a light guide plate known. In addition, this lamp has two light emission discs.

Aus der DE 33 25 773 A1 ist ein Lichtsignal bekannt, das zwischen einem Gehäuse und einer Kalotte einen Dichtungsring aufweist.From the DE 33 25 773 A1 a light signal is known which has a sealing ring between a housing and a cap.

Der Erfindung liegt die Aufgabe zugrunde, eine entsprechende verbesserte Hinweisleuchte anzugeben. Insbesondere soll die Leuchte bei besonders guten Lichtabgabeeigenschaften eine bessere Widerstandsfähigkeit gegenüber Umgebungseinflüssen aufweisen.The invention has for its object to provide a corresponding improved indicator light. In particular, the light should have a better resistance to environmental influences with particularly good light output properties.

Diese Aufgabe wird gemäß der Erfindung mit dem in dem unabhängigen Anspruch angegebenen Gegenstand gelöst. Besondere Ausführungsarten der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved according to the invention with the object specified in the independent claim. Particular embodiments of the invention are indicated in the dependent claims.

Gemäß der Erfindung ist eine Hinweisleuchte vorgesehen, die LEDs zur Erzeugung eines Lichts aufweist, sowie eine Lichtleiterplatte mit einer, in erster Näherung planen Vorderfläche, einer Rückfläche und einer, die Vorderfläche mit der Rückfläche verbindenden, randseitigen Seitenfläche, wobei die LEDs derart längs der Seitenfläche angeordnet sind, dass das Licht in die Lichtleiterplatte eingekoppelt wird. Weiterhin weist die Hinweisleuchte ein Rahmenelement auf, das um die Lichtleiterplatte und um die LEDs herum angeordnet ist, sowie eine erste Lichtaustrittsscheibe, die auf einer ersten Seite der Lichtleiterplatte angeordnet ist und eine zweite Lichtaustrittsscheibe, die auf einer zweiten Seite der Lichtleiterplatte angeordnet ist. Außerdem weist die Hinweisleuchte ein Dichtungselement auf, das sowohl dichtend zwischen dem Rahmenelement und der ersten Lichtaustrittsscheibe angeordnet ist, als auch dichtend zwischen dem Rahmenelement und der zweiten Lichtaustrittsscheibe.According to the invention, an indicator lamp is provided, which has LEDs for generating a light, and a light guide plate having a first plan front surface, a rear surface and a, the front surface with the rear surface connecting edge side surface, the LEDs along the side surface are arranged so that the light is coupled into the light guide plate. Furthermore, the direction indicator lamp has a frame element which is arranged around the light guide plate and around the LEDs, and a first light exit disc, which is arranged on a first side of the light guide plate and a second light exit disc, which is arranged on a second side of the light guide plate. In addition, the indicator lamp has a sealing element, which is arranged both sealingly between the frame member and the first light exit plate, as well as sealing between the frame member and the second light exit plate.

Durch das Dichtungselement lässt sich einerseits eine besonders gute Abdichtung der Hinweisleuchte erzielen, andererseits lässt sich durch das Dichtungselement die Lichtabgabe der Hinweisleuchte vorteilhaft beeinflussen.On the one hand, a particularly good sealing of the indicator light can be achieved by the sealing element; on the other hand, the light output of the indicator light can be advantageously influenced by the sealing element.

Vorzugsweise ist das Dichtungselement ringförmig geschlossen ausgestaltet. Hierdurch lässt sich allseitig eine besonders gute Abdichtung erzielen.Preferably, the sealing element is configured annularly closed. This makes it possible to achieve a particularly good seal on all sides.

Vorzugsweise besteht das Dichtungselement aus einem Gummi-Material, beispielsweise aus einem thermoplastischen Elastomer. Weiterhin vorzugsweise ist es in einem Spritzgussverfahren hergestellt. Weiterhin vorzugsweise ist das Dichtungselement profilartig gestaltet. Auf diese Weise lassen sich bei einfacher Herstellung besonders geeignete Eigenschaften des Dichtungselements erzielen.Preferably, the sealing element consists of a rubber material, for example of a thermoplastic elastomer. Further preferably, it is produced in an injection molding process. Further preferably, the sealing element is designed like a profile. In this way, particularly suitable properties of the sealing element can be achieved with simple production.

Erfindungsgemäß weist das Dichtungselement eine Nut auf, die in einem Querschnitt betrachtet U-förmig ist, wobei die Lichtleiterplatte mit ihrer Seitenfläche in diese Nut eingreifend angeordnet ist. Hierdurch lässt sich erzielen, dass das von den LEDs erzeugte Licht besonders gleichmäßig die Lichtleiterplatte verlässt und im Weiteren auf die erste bzw. zweite Lichtaustrittsscheibe gelangt.According to the invention, the sealing element has a groove, which is U-shaped in a cross-section, wherein the light guide plate is arranged with its side surface engaging in this groove. This makes it possible to achieve that the light generated by the LEDs leaves the light guide plate particularly uniformly and subsequently reaches the first or second light exit window.

Dabei ist weiterhin vorzugsweise die Nut auf der ersten Seite durch einen ersten, nach oben ragenden, freien U-Schenkel begrenzt und dabei die Gestaltung derart, dass sich die erste Lichtaustrittsscheibe bis unter ein erstes Niveau erstreckt, das durch die obere Begrenzung des ersten freien U-Schenkels festgelegt ist. Auf diese Weise lässt sich das Rahmenelement besonders schmal gestalten.In this case, furthermore, the groove on the first side is preferably delimited by a first, upwardly projecting, free U-limb and in this case the design such that the first light-exit disc extends below a first level which passes through the upper boundary of the first free U -Chelfels is fixed. In this way, the frame element can be made particularly narrow.

Wenn die LEDs vollständig unterhalb des ersten Niveaus angeordnet sind, lässt sich erzielen, dass die LEDs bei normaler Betrachtung der Hinweisleuchte durch das Dichtungselement verdeckt sind und somit keine entsprechenden Lichtpunkte zu sehen sind.If the LEDs are located completely below the first level, it can be achieved that the LEDs are covered by the sealing element during normal viewing of the indicator light and therefore no corresponding points of light can be seen.

Weiterhin vorzugsweise ist der erste U-Schenkel derart geformt, dass er auf der ersten Seite eine schräg abfallende Flanke aufweist. Hierdurch lässt sich erzielen, dass Licht von der Lichtleiterplatte bis in einen unteren Randbereich der ersten Lichtaustrittsscheibe gelangen kann, so dass eine besonders gute randseitige Ausleuchtung der ersten Lichtaustrittsscheibe ermöglicht ist. Diese randseitige Ausleuchtung ist weiterhin unterstützt, wenn die Flanke eine weiße und/oder eine reflektierende Oberfläche aufweist. Vorteilhaft weist das gesamte Dichtungselement eine weiße und/oder eine reflektierende Oberfläche auf.Further preferably, the first U-leg is shaped such that it has an obliquely falling edge on the first side. This makes it possible to achieve that light can pass from the light guide plate into a lower edge region of the first light exit disk, so that a particularly good edge-side Illumination of the first light exit plate is possible. This peripheral illumination is further supported if the flank has a white and / or a reflective surface. Advantageously, the entire sealing element has a white and / or a reflective surface.

Vorzugsweise weist das Rahmenelement auf der ersten Seite einen ersten, nach oben ragenden, freien Halteschenkel auf, der auf der ersten Seite von einem unteren Endbereich der ersten Lichtaustrittsscheibe angeordnet ist und sich nach oben hin bis auf ein zweites Niveau erstreckt, das sich unterhalb des ersten Niveaus befindet. Hierdurch lässt sich das Rahmenelement besonders schmal bzw. mit besonders geringer vertikaler Erstreckung gestalten.Preferably, the frame member has on the first side a first, upstanding, free support leg disposed on the first side from a lower end portion of the first light exit plate and extending upwardly to a second level extending below the first Levels is located. As a result, the frame element can be made particularly narrow or with a particularly small vertical extent.

Die randseitige Ausleuchtung ist dabei besonders unterstützt, wenn sich die Flanke nach unten hin bis auf das zweite Niveau oder bis unter das zweite Niveau erstreckt. Die LEDs sind dabei vorzugsweise oberhalb des zweiten Niveaus angeordnet.The edge illumination is particularly supported when the flank extends down to the second level or below the second level. The LEDs are preferably arranged above the second level.

Vorzugsweise ist das Dichtungselement mit Bezug auf eine, durch die Lichtleiterplatte verlaufende Symmetrieebene symmetrisch geformt. Hierdurch lassen sich die entsprechenden Vorteile auch in analoge Weise auf der Seite der zweiten Lichtaustrittsscheibe erzielen.Preferably, the sealing element is symmetrically shaped with respect to a plane of symmetry passing through the lightguide plate. As a result, the corresponding advantages can also be achieved in an analogous manner on the side of the second light-emitting disk.

Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels und mit Bezug auf die Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine Frontalansicht einer erfindungsgemäßen Hinweisleuchte,
Fig. 2
eine perspektivische Schnittansicht eines unteren Bereichs der Hinweisleuchte,
Fig. 3
eine entsprechende Schnittansicht eines oberen Bereichs,
Fig. 4
einen vergrößerten Ausschnitt aus Fig. 2 und
Fig. 5
eine Skizze zu dem Dichtungselement der Hinweisleuchte.
The invention is explained in more detail below with reference to an embodiment and with reference to the drawings. Show it:
Fig. 1
a frontal view of an indicator lamp according to the invention,
Fig. 2
a perspective sectional view of a lower portion of the sign lamp,
Fig. 3
a corresponding sectional view of an upper area,
Fig. 4
an enlarged section Fig. 2 and
Fig. 5
a sketch of the sealing element of the sign lamp.

Fig. 1 zeigt eine Skizze einer Frontalansicht einer erfindungsgemäßen Hinweisleuchte, im Folgenden auch kurz als Leuchte bezeichnet. Die Hinweisleuchte weist eine rechteckige Form auf, die durch ein Rahmenelement 7 der Leuchte festgelegt ist. Fig. 1 shows a sketch of a frontal view of an indicator lamp according to the invention, hereinafter also referred to briefly as a lamp. The directional lamp has a rectangular shape, which is defined by a frame member 7 of the lamp.

Zur leichteren Beschreibung wird im Folgenden davon ausgegangen, dass das Rahmenelement 7 in einer vertikalen Ebene angeordnet ist, die - wie in Fig. 1 mithilfe eines Koordinatensystems x, y, z angedeutet - durch eine x-y-Ebene festgelegt ist. Dies ist jedoch lediglich beispielhaft; die Hinweisleuchte eignet sich auch für eine anderweitige Orientierung mit Bezug auf die Vertikale. In einem solchen Fall sind die entsprechenden Richtungsangaben etc. in der vorliegenden Beschreibung entsprechend umzudeuten.For ease of description, it will be assumed below that the frame element 7 is arranged in a vertical plane which, as in FIG Fig. 1 indicated by a coordinate system x, y, z - defined by an xy plane. However, this is only an example; The indicator light is also suitable for another orientation with respect to the vertical. In such a case, the corresponding directions etc. are to be interpreted accordingly in the present description.

Im gezeigten Beispiel weist das Rahmenelement 7 einen unteren Rahmenschenkel 76, einen oberen Rahmenschenkel 77, einen ersten Rahmenseitenschenkel 78 und einen zweiten Rahmenseitenschenkel 79 auf, wobei die Rahmenseitenschenkel 78, 79 jeweils den oberen Rahmenschenkel 77 mit dem unteren Rahmenschenkel 77 verbinden.In the example shown, the frame member 7 has a lower frame leg 76, an upper frame leg 77, a first frame side leg 78 and a second frame side leg 79, wherein the frame side legs 78, 79 respectively connect the upper frame leg 77 with the lower frame leg 77.

Das Rahmenelement 7 kann an seinem oberen Rahmenschenkel 77 beispielsweise Angriffselemente 75 für ein Abhänge-Element, beispielsweise eine Pendelstange oder eine Kette oder dergleichen aufweisen.The frame element 7 may have, for example, engagement elements 75 for a suspension element, for example a pendulum rod or a chain or the like, on its upper frame limb 77.

Fig. 2 zeigt eine perspektivische Schnittdarstellung eines unteren Bereichs der Hinweisleuchte, wobei der Schnitt in einer x-z-Ebene in einem mittleren Bereich der Hinweisleuchte gelegt ist, Fig. 3 zeigt eine entsprechende Skizze eines oberen Bereichs. Fig. 2 shows a perspective sectional view of a lower portion of the sign lamp, wherein the section is placed in an xz plane in a central region of the sign lamp, Fig. 3 shows a corresponding sketch of an upper area.

Wie in Fig. 2 angedeutet, weist die Leuchte LEDs 2 zur Erzeugung eines Lichts auf. Insbesondere kann vorgesehen sein, dass die LEDs 2 die einzige Lichtquelle der Leuchte bilden. Die LEDs 2 können, wie an sich üblich, auf einer insbesondere länglichen Platine 21 angeordnet sein.As in Fig. 2 indicated, the lamp has LEDs 2 for generating a light. In particular, it can be provided that the LEDs 2 form the only light source of the lamp. As is customary, the LEDs 2 can be arranged on a particularly elongated circuit board 21.

Weiterhin weist die Leuchte eine Lichtleiterplatte 3 mit einer, in erster Näherung planen Vorderfläche 4, einer Rückfläche 5 und einer, die Vorderfläche 4 mit der Rückfläche 5 verbindenden, randseitigen Seitenfläche 6 auf. Die LEDs 2 sind dabei derart längs der Seitenfläche 6 angeordnet, dass das Licht, das durch die LEDs 2 erzeugt wird, in die Lichtleiterplatte 3 eingekoppelt wird. Im gezeigten Beispiel erstrecken sich die LEDs 2 längs des unteren Rahmenschenkels 76.Furthermore, the luminaire has a light guide plate 3 with a front surface 4 which is planed in the first approximation, a rear surface 5 and a peripheral side surface 6 connecting the front surface 4 with the rear surface 5. The LEDs 2 are arranged along the side surface 6 such that the light generated by the LEDs 2 is coupled into the light guide plate 3. In the example shown, the LEDs 2 extend along the lower frame leg 76th

Das Rahmenelement 7 ist dabei um die Lichtleiterplatte 3 und um die LEDs 2 herum angeordnet.The frame member 7 is arranged around the light guide plate 3 and around the LEDs 2 around.

Weiterhin weist die Leuchte eine erste Lichtaustrittsscheibe 8 auf, die auf einer ersten Seite re der Lichtleiterplatte 3 angeordnet ist. Im gezeigten Beispiel weist die erste Seite re in die negative z-Richtung und wird im Folgenden auch mit "rechts" bezeichnet. Insbesondere ist die erste Lichtaustrittsscheibe 8 parallel zu der Lichtleiterplatte 3 orientiert angeordnet.Furthermore, the lamp has a first light exit plate 8, which is arranged on a first side re the light guide plate 3. In the example shown, the first page re in the negative z-direction and is also referred to below as "right". In particular, the first light exit plate 8 is arranged oriented parallel to the light guide plate 3.

Weiterhin weist die Leuchte eine zweite Lichtaustrittsscheibe 9 auf, die auf einer zweiten Seite li der Lichtleiterplatte 3 angeordnet ist. Die zweite Seite li ist dabei mit Bezug auf die Lichtleiterplatte 3 der ersten Seite re entgegen gerichtet, weist also in die z-Richtung und wird im Folgenden auch mit "links" bezeichnet. Insbesondere ist die zweite Lichtaustrittsscheibe 9 parallel zu der Lichtleiterplatte 3 orientiert angeordnet.Furthermore, the lamp has a second light exit plate 9, which is arranged on a second side li of the light guide plate 3. The second side li is directed with respect to the light guide plate 3 of the first side re opposite, thus has in the z-direction and is hereinafter also referred to as "left". In particular, the second light exit disk 9 is arranged oriented parallel to the light guide plate 3.

Die Leuchte ist derart gestaltet, dass das von den LEDs 2 erzeugte Licht in die Lichtleiterplatte 3 eintritt und im Folgenden zumindest teilweise über die Vorderfläche 4 und/oder die Rückfläche 5 die Lichtleiterplatte 3 verlässt und im Weiteren die erste Lichtaustrittsscheibe 8 bzw. die zweite Lichtaustrittsscheibe 9 durchsetzt und schließlich die Leuchte verlässt.The luminaire is designed in such a way that the light generated by the LEDs 2 enters the light guide plate 3 and subsequently leaves the light guide plate 3 at least partially via the front surface 4 and / or the back surface 5 and subsequently the first light exit disc 8 and the second light exit disc, respectively 9 interspersed and finally leaves the light.

Wie in den Figuren 2 und 3 im Fall der zweiten Lichtaustrittsscheibe 9 angedeutet, können die erste Lichtaustrittsscheibe 8 bzw. die zweite Lichtaustrittsscheibe 9 mit einem Piktogramm versehen sein, beispielsweise zur Anzeige eines Fluchtwegs.As in the Figures 2 and 3 indicated in the case of the second light exit plate 9, the first light exit plate 8 and the second light exit plate 9 may be provided with a pictogram, for example, to display an escape route.

Weiterhin weist die Leuchte ein Dichtungselement 10 auf, das sowohl dichtend zwischen dem Rahmenelement 7 und der ersten Lichtaustrittsscheibe 8 angeordnet ist, als auch dichtend zwischen dem Rahmenelement 7 und der zweiten Lichtaustrittsscheibe 9. Durch das Dichtungselement 10 lässt sich erzielen, dass die LEDs 2 in einem abgedichteten Innenraum der Leuchte angeordnet sind, der insbesondere spritzwassergeschützt abgedichtet sein kann. Beispielsweise kann hierfür die Schutzklasse IP 42 vorgesehen sein. Der Innenraum kann dabei durch das Dichtungselement 10, die erste Lichtaustrittsscheibe 8 und die zweite Lichtaustrittsscheibe 9 begrenzt bzw. umschrieben sein.Furthermore, the lamp has a sealing element 10, which is arranged both sealing between the frame member 7 and the first light exit plate 8, as well as sealing between the frame member 7 and the second light exit plate 9. By the sealing member 10 can be achieved that the LEDs 2 in a sealed interior of the lamp are arranged, which can be sealed in particular splash-proof. For example, the protection class IP 42 can be provided for this purpose. The interior can be limited or circumscribed by the sealing element 10, the first light exit disk 8 and the second light exit disk 9.

Vorzugsweise ist das Dichtungselement 10 ringförmig geschlossen ausgestaltet. Insbesondere kann es vier Dichtungselement-Schenkel aufweisen, wobei sich ein erster Dichtungselement-Schenkel parallel zu dem unteren Rahmenschenkel 76 erstreckt, ein zweiter Dichtungselement-Schenkel parallel zu dem oberen Rahmenschenkel 77, ein dritter Dichtungselement-Schenkel parallel zu dem ersten Rahmenseitenschenkel 78 und ein vierter Dichtungselement-Schenkel parallel zu dem zweiten Rahmenseitenschenkel 79.Preferably, the sealing element 10 is configured annularly closed. In particular, it may have four sealing element legs, with a first sealing element leg extending parallel to the lower frame leg 76, a second sealing element leg parallel to the upper frame leg 77, a third sealing element leg parallel to the first frame side leg 78 and a fourth Seal member legs parallel to the second frame side legs 79th

Vorzugsweise besteht das Dichtungselement 10 aus einem Gummi-Material. Insbesondere kann es aus einem thermoplastischen Elastomer bestehen. Vorzugsweise ist es in einem Spritzgussverfahren hergestellt.Preferably, the sealing element 10 is made of a rubber material. In particular, it may consist of a thermoplastic elastomer. Preferably, it is produced in an injection molding process.

Wie im gezeigten Beispiel der Fall, ist das Dichtungselement 10 weiterhin vorzugsweise profilartig gestaltet. In Fig. 4 ist ein vergrößerter Ausschnitt aus Fig. 2 wiedergegeben, der einen Bereich um das Dichtungselement 10 bzw. den ersten Dichtungselement-Schenkel herum zeigt; Fig. 5 zeigt einen Abschnitt des Dichtungselements 10.As in the example shown, the case, the sealing element 10 is further preferably designed like a profile. In Fig. 4 is an enlarged section of Fig. 2 which shows an area around the seal member 10 and the first seal member leg, respectively; Fig. 5 shows a portion of the sealing element 10th

Wie aus Fig. 5 beispielhaft hervorgeht, weist das Dichtungselement 10 eine Nut 15 auf, die in einem Querschnitt betrachtet U-förmig ist, wobei die Lichtleiterplatte 3 - wie in Fig. 2 gezeigt - mit ihrer Seitenfläche 6 in diese Nut 15 eingreifend angeordnet ist. Hierdurch lässt sich erzielen, dass das von den LEDs 2 direkt abgestrahlte Licht bei normaler Betrachtung der Leuchte von außen von dem Dichtungselement 10 abgeschirmt wird, so dass um die LEDs 2 herum keine entsprechenden Lichtpunkte zu sehen sind.How out Fig. 5 By way of example, the sealing element 10 has a groove 15, which is U-shaped in a cross-section, wherein the light guide plate 3 - as in Fig. 2 shown - is arranged engaging with its side surface 6 in this groove 15. This makes it possible to achieve that the light emitted directly by the LEDs 2, when the luminaire is normally viewed from the outside, of the sealing element 10 is shielded so that around the LEDs 2 around no corresponding points of light can be seen.

Vorzugsweise ist die Platine 21 mit den LEDs 2 in die Nut 15 eingesetzt angeordnet.Preferably, the board 21 is arranged with the LEDs 2 inserted into the groove 15.

Vorzugsweise ist dabei - wie in Fig. 5 beispielhaft gezeigt - die Nut 15 auf der ersten Seite re bzw. auf der rechten Seite durch einen ersten, nach oben ragenden freien U-Schenkel 11 begrenzt. Dieser erste U-Schenkel 11 erstreckt sich nach oben hin bis auf ein erstes Niveau N1, das somit durch eine obere Begrenzung des ersten U-Schenkels 11 festgelegt ist. Dabei ist die Gestaltung derart, dass sich die erste Lichtaustrittsscheibe 8 bis unter dieses erste Niveau N1 erstreckt. Auf diese Weise lässt sich erzielen, dass das Rahmenelement 7 bzw. hier dessen unterer Rahmenschenkel 76 mit einer besonders geringen vertikalen Erstreckung bzw. besonders schmal gestaltet werden kann. Dies ist mit Bezug auf das äußere Erscheinungsbild der Hinweisleuchte vorteilhaft.Preferably is - as in Fig. 5 shown by way of example - the groove 15 on the first side re or limited on the right side by a first, upstanding free U-leg 11. This first U-leg 11 extends upwardly to a first level N1 , which is thus defined by an upper boundary of the first U-leg 11. The design is such that the first light exit plate 8 extends below this first level N1 . In this way it can be achieved that the frame element 7 or here its lower frame leg 76 can be designed with a particularly small vertical extent or particularly narrow. This is advantageous with respect to the external appearance of the sign lamp.

Vorzugsweise sind dabei die LEDs 2 vollständig unterhalb des ersten Niveaus N1 angeordnet. Hierdurch lässt sich bei normaler Betrachtung der Leuchte eine entsprechende vollständige Abschirmung der LEDs 2 durch das Dichtungselement 10 erzielen.Preferably, the LEDs 2 are arranged completely below the first level N1 . As a result, a corresponding complete shielding of the LEDs 2 by the sealing element 10 can be achieved with normal viewing of the luminaire.

Weiterhin vorteilhaft ist der erste U-Schenkel 11 des Dichtungselements 10 derart geformt, dass er auf der ersten Seite re eine schräg abfallende Flanke 111 aufweist. Insbesondere kann dabei vorgesehen sein, dass die Flanke 111 mit einer durch die Lichtleiterplatte 3 festgelegten Ebene einen Winkel α einschließt, der zwischen 10° und 85° beträgt, vorzugsweise zwischen 20° und 70°. Durch diese Flanke 111 lässt sich erzielen, dass Licht, welches die Lichtleiterplatte 3 über die Vorderfläche 4 verlässt, auch unterhalb des ersten Niveaus N1 in die erste Lichtaustrittsscheibe 8 einfallen kann. Auf diese Weise lässt sich eine besonders gleichmäßige Ausleuchtung der ersten Lichtaustrittsscheibe 8 bewirken. Licht kann somit bis in den unteren Randbereich des Piktogramms einfallen.Further advantageously, the first U-leg 11 of the seal member 10 is formed such that it re on the first side a sloping flank 111 has. In particular, it can be provided that the flank 111 encloses an angle α with a plane defined by the light guide plate 3, which angle is between 10 ° and 85 °, preferably between 20 ° and 70 °. By means of this flank 111 it can be achieved that light which leaves the light guide plate 3 via the front surface 4 can also be incident on the first light exit disc 8 below the first level N1 . In this way, a particularly uniform illumination of the first light exit plate 8 can be effected. Light can thus fall into the lower edge area of the pictogram.

Diese nach unten hin randseitige Ausleuchtung der ersten Lichtaustrittsscheibe 8 wird dabei forciert, wenn die Flanke 111 eine weiße und/oder eine reflektierende Oberfläche aufweist. Vorteilhaft weist das gesamte Dichtungselement 10 eine weiße und/oder reflektierende Oberfläche auf.This downward edge illumination of the first light exit plate 8 is forced, when the edge 111 is a white and / or a reflective Surface has. Advantageously, the entire sealing element 10 has a white and / or reflective surface.

Der erste U-Schenkel 11 ist vorzugsweise so geformt, dass er sich nach oben hin verjüngt. Auf seiner zweiten Seite li, also zu der Platine 21 hin, kann er eine vertikal verlaufende Flanke aufweisen.The first U-leg 11 is preferably shaped so that it tapers towards the top. On its second side li, ie toward the board 21, it can have a vertical flank.

Wie beispielhaft in Fig. 4 gezeigt, weist das Rahmenelement 7 bzw. hier der untere Rahmenschenkel 76 vorzugsweise auf der ersten Seite re einen ersten, nach oben ragenden, freien Halteschenkel 71 auf, der auf der ersten Seite re von einem unteren Endbereich der ersten Lichtaustrittsscheibe 8 angeordnet ist und sich nach oben hin bis auf ein zweites Niveau N2 erstreckt, das sich unterhalb des ersten Niveaus N1 befindet. Das Rahmenelement 7 umgreift somit mit dem Halteschenkel 71 die erste Lichtaustrittsscheibe 8 - mit Bezug auf den Innenraum der Leuchte - von außen. Hierdurch lässt sich der untere Rahmenschenkel 76 mit einer besonders kleinen vertikalen Erstreckung gestalten; dies ist mit Bezug auf das äußere Erscheinungsbild der Leuchte vorteilhaft.As exemplified in Fig. 4 shown, the frame member 7 and here the lower frame leg 76 preferably on the first side re a first, upstanding, free retaining leg 71 which is disposed on the first side re from a lower end portion of the first light exit plate 8 and after at the top to a second level N2 , which is below the first level N1 . The frame member 7 thus engages with the retaining leg 71, the first light exit plate 8 - with respect to the interior of the lamp - from the outside. As a result, the lower frame member 76 can be designed with a particularly small vertical extent; this is advantageous with respect to the external appearance of the luminaire.

Wie in Fig. 5 angedeutet, weist im gezeigten Beispiel das Dichtungselement 10 auf der ersten Seite re neben der Flanke 111 eine weitere Nut 13 auf, in welche die erste Lichtaustrittsscheibe 8 mit einem unteren Endbereich eingreifend angeordnet ist. Wie gezeigt, weist die erste Lichtaustrittsscheibe 8 hierzu einen flanschartigen Vorsprung 81 auf, der in die weitere Nut 13 eingreift.As in Fig. 5 indicated, in the example shown, the sealing element 10 on the first side re next to the edge 111, a further groove 13, in which the first light exit plate 8 is arranged engaging with a lower end portion. As shown, the first light exit disc 8 for this purpose has a flange-like projection 81, which engages in the further groove 13.

Die weitere Nut 13 ist auf der ersten Seite re von einem, ebenfalls nach oben ragenden Dichtungsschenkel 12 begrenzt. Auf der ersten Seite dieses Dichtungsschenkels 12 schließt sich unmittelbar der erste freie Halteschenkel 71 des Rahmenelements 7 an. Hierdurch ist eine besonders gute Abdichtung des Innenraums ermöglicht.The other groove 13 is on the first side of a re also upwardly extending sealing leg 12 is limited. On the first side of this sealing leg 12 immediately follows the first free retaining leg 71 of the frame member 7 at. As a result, a particularly good sealing of the interior is possible.

Lichttechnisch vorteilhaft ist die Leuchte derart gestaltet, dass sich die Flanke 111 nach unten hin bis auf das zweite Niveau N2 oder bis unter das zweite Niveau N2 erstreckt. Die LEDs 2 hingegen sind vorteilhaft oberhalb des zweiten Niveaus angeordnet.In light engineering terms, the luminaire is configured such that the flank 111 extends downwards to the second level N2 or below the second level N2 . The LEDs 2, however, are advantageously arranged above the second level.

Wie in Fig. 4 angedeutet, erstreckt sich der untere Rahmenschenkel 76 vorzugsweise nach unten hin bis auf ein drittes Niveau N3, das sich unterhalb des zweiten Niveaus N2 befindet. Vorzugsweise gilt dabei die Beziehung ¼ · (N2 - N3) < (N1 - N2) < (N2 - N3).As in Fig. 4 is indicated, the lower frame leg 76 preferably extends down to a third level N3, which is located below the second level N2 . The relationship ¼ * (N 2 -N 3) <(N 1 -N 2) <(N 2 -N 3) preferably applies here.

Wie beispielsweise aus Fig. 2 hervorgeht, ist das Dichtungselement 10 vorzugsweise symmetrisch mit Bezug auf eine Symmetrieebene M gestaltet, die durch die Lichtleiterplatte 3 verläuft. Dabei ist die Leuchte auch mit Bezug auf das Rahmenelement 7 bzw. die zweite Lichtaustrittsscheibe 9 entsprechend symmetrisch gestaltet.Like, for example Fig. 2 As can be seen, the sealing element 10 is preferably designed symmetrically with respect to a plane of symmetry M which passes through the light guide plate 3. In this case, the luminaire is designed symmetrically with respect to the frame element 7 and the second light exit plate 9.

Herstellungstechnisch vorteilhaft sind das Rahmenelement 7 und das Dichtungselement 10 weiterhin derart geformt, dass sich das Dichtungselement 10 formschlüssig in das Rahmenelement 7 einlegen lässt. Im gezeigten Beispiel weist das Rahmenelement 7 hierzu zwei Vorsprünge 73, 74 auf und das Dichtungselement 10 einen nach unten weisenden Eingriffsbereich 14, der formschlüssig auf der ersten Seite re und der zweiten Seite li von den beiden Vorsprüngen 73, 74 des Rahmenelements 7 umfasst wird.In terms of manufacturing technology, the frame element 7 and the sealing element 10 are furthermore shaped such that the sealing element 10 can be inserted into the frame element 7 in a form-fitting manner. In the example shown, the frame member 7 for this purpose has two projections 73, 74 and the sealing member 10 has a downwardly facing engagement portion 14 which is positively on the first side re and the second side li of the two projections 73, 74 of the frame member 7 is included.

Das Rahmenelement 7 besteht vorzugsweise aus Aluminium. Vier entsprechende Schenkel-Profilelemente können dabei über Eckverbinder (Kratzfedern) zu dem Rahmenelement 7 zusammengefasst sein. Hierdurch lässt sich ein besonders geeigneter Anpressdruck gegenüber dem Dichtungselement 10 bewirken.The frame member 7 is preferably made of aluminum. Four corresponding leg profile elements can be combined via corner connectors (scraper springs) to the frame element 7. This makes it possible to effect a particularly suitable contact pressure with respect to the sealing element 10.

In der obigen Beschreibung ist wie erwähnt davon ausgegangen, dass sich die LEDs 2 entlang des unteren Rahmenschenkels 76 erstrecken. Dementsprechend sind die Bezeichnungen oben, unten, Niveau u. s. w. gewählt. Allerdings kann die Gestaltung auch derart sein, dass sich die LEDs zusätzlich oder alternativ entlang des oberen Rahmenschenkels 75 und/oder des ersten Rahmenseitenschenkels 78 und/oder des zweiten Rahmenseitenschenkels 79 erstrecken. Die Gestaltung ist in diesem Fall analog der obigen Darstellung ausgebildet, so dass die entsprechenden Richtungsangaben etc. entsprechend umzudeuten sind.In the above description, as mentioned, it is assumed that the LEDs 2 extend along the lower frame leg 76. Accordingly, the terms top, bottom, level, etc. are selected. However, the design may also be such that the LEDs additionally or alternatively extend along the upper frame leg 75 and / or the first frame side leg 78 and / or the second frame side leg 79. The design is formed in this case analogous to the above representation, so that the corresponding direction information etc. are to be reinterpreted accordingly.

Durch die beschriebene Gestaltung lässt sich eine besonders homogene Ausleuchtung der ersten Lichtaustrittsscheibe 8 bzw. der zweiten Lichtaustrittsscheibe 9 erzielen. Insbesondere lässt sich - bei schmaler Gestaltung des Rahmenelements 7 - im Randbereich eine besonders gute Ausleuchtung erzielen.By the described design, a particularly homogeneous illumination of the first light exit plate 8 and the second light exit plate 9 can be achieved. In particular, in the case of a narrow design of the frame element 7, a particularly good illumination can be achieved in the edge region.

Claims (11)

  1. Indicator lamp, comprising
    - LEDs (2) for producing a light,
    - a light guide plate (3) having a front surface (4), which is flat in the first approximation, a rear surface (5) and an edge-side lateral surface (6) which connects the front surface (4) to the rear surface (5),
    wherein the LEDs (2) are disposed along the lateral surface (6) such that the light is coupled into the light guide plate (3),
    - a frame element (7), which is disposed around the light guide plate (3) and around the LEDs (2),
    - a first light exit pane (8), which is disposed on a first side (re) of the light guide plate (3), and
    - a second light exit pane (9), which is disposed on a second side (li) of the light guide plate (3),
    - a sealing element (10), which is disposed both in a sealing manner between the frame element (7) and the first light exit pane (8) and also in a sealing manner between the frame element (7) and the second light exit pane (9),
    characterized in that
    the sealing element (10) is configured in the shape of a profile and comprises a groove (15) which is U-shaped when viewed in cross-section, wherein the light guide plate (3) is disposed such that its lateral surface (6) engages in said groove (15).
  2. Indicator lamp according to Claim 1,
    in which the sealing element (10) is configured to have closed annular shape.
  3. Indicator lamp according to Claim 1 or 2,
    in which the sealing element (10) is made of a rubber material, for example a thermoplastic elastomer, and is preferably produced in an injection molding process.
  4. Indicator lamp according to any one of the preceding Claims,
    in which the groove (15) is delimited by a first, upwardly projecting, free U-leg (11) on the first side (re) and the configuration is such that the first light exit pane (8) extends to below a first level (N1), which is defined by the upper limitation of the first free U-leg (11).
  5. Indicator lamp according to Claim 4,
    which is configured such that the LEDs (2) are completely disposed below the first level (N1).
  6. Indicator lamp according to Claim 4 or 5,
    in which the first U-leg (11) is shaped such that it comprises a downward sloping flank (111) on the first side (re).
  7. Indicator lamp according to Claim 6,
    in which the flank (111), preferably the entire sealing element (10), has a white and/or a reflecting surface.
  8. Indicator lamp according to Claim 6 or 7,
    in which, on the first side (re), the frame element (7) has a first, upwardly projecting, free retaining leg (71), which is disposed on the first side (re) of a lower end region of the first light exit pane (8) and extends upward to a second level (N2) located below the first level (N1).
  9. Indicator lamp according to Claim 8,
    which is configured such that the flank (111) extends downward to the second level (N2) or to below the second level (N2).
  10. Indicator lamp according to Claim 9,
    which is configured such that the LEDs (2) are disposed above the second level (N2).
  11. Indicator lamp according to any one of the preceding Claims, in which, with respect to a plane of symmetry (M) which extends through the light guide plate (3), the sealing element (10) is symmetrically shaped.
EP13198090.6A 2012-12-19 2013-12-18 Indicator lamp Active EP2747060B1 (en)

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