[0001] The invention relates to a recessed luminaire, comprising a casing, a circuit board
that supports at least one light emitting diode, and a cover formed of a transparent
material. In particular, the invention relates to such a recessed luminaire for a
mounting opening of a furniture board.
[0002] Recessed luminaires for furnitures boards are known, which are mountable in mounting
openings of a furniture board. Usually they are mounted in the furniture board with
a luminaire front facing downwards, in order to illuminate an area below the furniture
board. For example, such recessed luminaires may be applied to display cabinets, shelves
or the like. A recessed luminaire is known from
EP 1 724 516 A1.
[0003] It is an object of the invention to accomplish a recessed luminaire that may be assembled
particularly easily.
[0004] According to the invention, this object is achieved by a recessed luminaire of the
kind mentioned initially, wherein the cover comprises a lens unit, the casing is adapted
for accommodating the circuit board and the lens unit, the cover comprises locking
members for locking it to the casing, and the cover comprises mounting springs for
fixing the recessed luminaire in a mounting opening of a furniture board.
[0005] As the cover comprises locking members for locking it to the casing, as well as mounting
springs for fixing it to the mounting opening, the cover may be fixed by locking it
to the casing without the use of tools, after inserting the circuit board into the
casing, and, thereby, the mounting springs are provided at the same time. This is
particularly advantageous. Firstly, no further mounting member is required for fixing
the cover to the casing. Secondly, it is made possible to provide for a rigid casing
e.g. of metal, because flexible locking members as well as flexible mounting springs
may be provided by the cover, which is, for example, formed of transparent plastics.
A metal casing is particularly advantageous, since it allows to dissipate waste heat
of high-power light emitting diodes.
[0006] Useful details and advancements of the invention are indicated in the dependent claims.
[0007] As preferred embodiment of the invention will now be described in conjunction with
the drawings in which:
- Fig. 1
- is a schematic, perspective exploded view of a recessed luminaire according to the
invention;
- Fig. 2
- is a schematic, perspective sectional view of the assembled recessed luminaire;
- Fig. 3
- is a schematic side view of the recessed luminaire in a version having an aperture
attachment; and
- Fig. 4
- is a schematic sectional view of the aperture attachment.
[0008] Fig. 1 schematically shows an exploded view of a recessed luminaire 10 having a casing
12, a circuit board 14, a seal in the form of an O-ring seal 16, a cover 18, and a
cover ring 20. Also shown is a plug 22 with a cable for supplying power.
[0009] Fig. 2 shows, in a slightly perspectively tilted sectional view, the luminaire in
a mounted state, in which the circuit board 14 is inserted into the casing 12 and
abuts on the bottom 24 of the casing. The cover 18 is arranged in front of the circuit
board 14, wherein the seal ring 16 is arranged between the casing 12 and the cover
18. Also shown is the cover ring 20.
[0010] The casing 12 is cup-shaped, having the bottom 24 and a circumference wall or side
wall 26 standing away therefrom towards the front side of the luminaire. The casing
is substantially round. The side wall 26 is substantially cylindrical. The casing
12 is made of metal, for example, is an aluminium diecast casing. At the front edge,
flange portions 28 stand away from the side wall 26 for delimiting an inserting depth
when inserting the recessed luminaire 10 into an mounting opening. Further, cooling
structures 30, e.g. cooling ribs, are formed at the outside of the side wall 26.
[0011] Furthermore, at the outside of the side wall 26, there are formed accommodation contours
32 for mounting springs 34 of the cover 18, which are recessed inwards and which run
transverse to the bottom 24, as well as accommodation contours 36 for snap-in lugs
38 of the cover ring 20, at other circumferential positions.
[0012] Furthermore, snap-in contours 40 for locking snap-in pins 42 of the cover 18 are
formed projecting from the inside of the side wall 26.
[0013] Finally, there are provided alignment contours 44 at the inside of the side wall
26 for interacting with complementary alignment contours 46 at the circumferential
edge of the circuit board 14.
[0014] The round, approximately circular disk shaped circuit board 14 is equipped with light
emitting diodes (LEDs) 48 at the front, and is adapted to the cross section of the
casing 12. A portion of the circuit board 14, which projects sidewards, supports a
plug connector, which is, in the mounted state, arranged in a corresponding opening
of the casing 12 and which allows to insert a plug 22 from the outside.
[0015] As is shown in Fig. 2, the seal ring 16 rests on a shoulder at the inner side of
the circumference wall 26 of the casing 12 in the mounted state. The shoulder forms
a sealing face. An opposite sealing face is formed by a ring shaped protrusion projecting
from the outside of the cover 18.
[0016] Fig. 2 further shows the snap-in pin 42, which is in locking engagement with the
snap-in contour 40 that projects obliquely downwards. The snap-in pin 42 can deflect
inwards and comprises a recess, in which the snap-in contour 40 engages. Multiple
snap-in contours 40 and associated snap-in pins 42 are distributedly arranged at the
circumference of the casing 12 and the cover 18.
[0017] In the locked state, the seal 16 seals the cover 18 against the side wall 26, and
thereby protects against entry of splash water into the casing 12, when the luminaire
10 is mounted in a mounting opening. For example, the seal ring is of silicone or
an other elastomer.
[0018] In the mounted state, the cover 18 also presses the circuit board 14 to the bottom
24 of the casing 12 and thereby provides for a good heat contact for dissipating heat
of the light emitting diodes 48 into the casing 12. The circuit board 14 e.g. comprises
a metallic heat dissipation structure. In particular, it is a circuit board with aluminium
core.
[0019] In addition to the mounting springs 34 and snap-in pins 42, the cover 18 comprises
a lens unit 50, which is indicated in Fig. 2 in a cross sectional view. The lens unit
50 comprises a lens element 52 in front of each of the light emitting diodes 48. Each
lens element 52 has a recess clearance, which is e.g. cylindrical, at the end facing
the LED, for coupling light into the surrounding lens element body on the face side
and on the circumferential side. At the outside, the lens element 52 forms a chalice-shaped
reflecting contour that expands towards the front, for reflecting light, which is
guided in the transparent material of the lens element 52, towards the front side.
[0020] The lens elements merge into a front side cover plate 54 of the transparent cover
18, which is substantially circular disk-shaped. The cover plate 54 forms the free
surface of the lens unit 50 as well as of the cover 18.
[0021] The cover 18 is integrally formed with the lens unit 50 and the mounting springs
34 as well as the snap-in pins 42, for example of PMMA (polymethylmethacrylate) or
PC (polycarbonate).
[0022] Multiple mounting springs 34 are distributedly arranged at the circumference of the
cover 18. The respective mounting spring 34 projects at the outside from the circumferential
edge of the cover plate 54, continuous backwards in a first portion 56, and, further
outside, from a back side end obliquely back to the front. The mounting spring 34
has a cross-section that is formed approximately V-shaped. Therein, the first portion
56 forms a first leg of the V and is connected at its end to the cover plate 54 by
a short bar. The second portion 58, which obliquely projects outwards, forms the second
leg of the V.
[0023] In the mounted state, the mounting spring 34 with its short bar engages around the
front side edge of the side wall 26, and the first portion 56 runs towards the backside
in the accommodation contour 32 along the side wall 26 and at the outside of the same.
When the mounted luminaire 10 is inserted into a round mounting opening (Fig. 3),
the mounting spring 34 is supported by its back side end at the outside of the side
wall 26, in particular at the bottom of the accommodation contour 32. The portion
58 that projects obliquely to the front is deflected inwards, such that the luminaire
10 is securely held by the mounting springs 34 in the inner, cylindrical, circumferential
wall of the mounting opening 60.
[0024] The cover ring 20 covers the front edge and, in particular, the flange portions 28
of the casing 12 at the front side, and may be shaped according to the desired design.
The cover ring 20 is snap-in lockable to the casing 12 by the snap-in lugs 38, which
are distributedly arranged around the opening 62 of the cover ring 20 at the backside
of the cover ring 20. This is done by the snap-in lugs 38 being inserted into the
accommodation contours 36 and sliding towards the outside over a snap-in projection
of the accommodation contour 36, while being flexibly deflected, and engaging the
snap-in projection 64 of the accommodation contour 36. This is exemplarily shown in
Fig. 2.
[0025] In the mounted state, the cover ring 20 and the integrated cover plate 54 of the
cover 18 approximately lie in one plane.
[0026] Fig. 3 schematically shows a side view of the recessed luminaire 10, wherein an aperture
attachment 66 is mounted in addition to the components already described, which is
shown in Fig. 4 in a cross sectional view.
[0027] The aperture attachment 66 comprises a narrow flange 68 at its outside at its back
side end, which flange projects outwards from a ring shaped wall 70. The flange 68
is insertable into an adapted, flat, ring shaped clearance 72 (Fig. 2) at the back
side of the cover ring 20, before the cover ring 20 is mounted to the luminaire. Therein,
the wall 70 projects from the cover ring 20 through the opening 62 to the front. In
this region, the clearance 72 is accessable through a ring shaped gap between the
cover ring 20 and the cover plate 54. For example, the aperture attachment 66 forms
an aperture for delimiting the light output of the recessed luminaire 10. The aperture
attachment 66 can be formed according to any desired design.
[0028] For example, the described luminaire has a mounting diameter according to the free
cross section of the mounting opening of 58 mm. The mounting depth of the recessed
luminaire 10, which is determined by the depth of the casing 12 behind the flange
portions 28, is, for example, 15 mm or less, in particular, for example, 13 mm.
[0029] The cover ring 20, and the optional aperture attachment 66, are, for example, formed
of plastics, e.g. polycarbonate or ABS (acrylonitrile-butadiene-styrene).
[0030] The described luminaire can not only be assembled and mounted in a mounting opening
60 without the use of tools in a particularly easy manner with a few hand movements,
wherein the circuit board 14 is used prefabricated with the light emitting diodes
48 and the plug connector. Moreover, the luminaire can also be detached from a furniture
without the use of tools, because the electrical connection is done via the plug 22,
and because the mounting springs 34 with their free ends are accessible from the front,
when the cover ring 20 is detached, and can easily be disengaged from the mounting
opening 60. This is due to the accommodation contours 32 for the mounting springs
34 running along the side wall 26, towards the front, up to an open end, where the
mounting springs 34 engage around the front edge of the side wall 36.
[0031] Moreover, at the back side of the casing 12, there are provided openings 74 in front
of the ends of the snap-in pins 42 in the region of the snap-in contours 40. Thereby,
the snap-in pins, which are in the inside of the casing 12, may be disengaged from
the snap-in contours 40, such that the cover 18 may be detached from the casing 12.
1. Recessed luminaire, in particular for a mounting opening of a furniture board, comprising:
- a casing (12),
- a circuit board (14) that supports at least one light emitting diode (48), and
- a cover (18) formed of a transparent material,
wherein the cover (18) comprises a lens unit (50),
wherein the casing (12) is adapted for accommodating the circuit board (14) and the
lens unit (50),
wherein the cover (18) comprises snap-in members (42), by which the cover is lockable
to the casing (12), and
wherein the cover (18) comprises mounting springs (34) for fixing the recessed luminaire
(10) in a mounting opening (60) of a furniture board.
2. Recessed luminaire according to claim 1, wherein the cover (18) is adapted for arranging
the lens unit (50) in the casing (12) in a position in which the cover (18) is locked
to the casing, in which position the mounting springs (34) are arranged external to
a side wall of the casing (12).
3. Recessed luminaire according to claim 1 or 2, wherein the mounting springs (34) each
comprise a first portion (56) running from a front side portion of the cover (18)
towards the back side, and a second portion (58) running further outside back to the
front side, wherein a clearance for accommodating a portion of a side wall (26) of
the casing (12) is formed between the respective mounting spring (34) and the lens
unit (50).
4. Recessed luminaire according to any one of the preceding claims, wherein the cover
(18) is adapted for holding, in a position in which it is locked to the casing (12),
the circuit board (14) to rest on a bottom (24) of the casing (12).
5. Recessed lumimaire according to any one of the preceding claims, wherein the casing
(12) is of metal and comprises cooling structures (30) at its outside.
6. Recessed luminaire according to any one of the preceding claims, wherein the casing
(12) is an integrally cast metal diecast casing.
7. Recessed luminaire according to any one of the preceding claims, further comprising
a cover ring (20), which comprises snap-in elements (38) that project at the back
side, and which are adapted for locking the cover ring (20) to an outside of a side
wall (26) of the casing (12).
8. Recessed luminaire according to claim 7, wherein the casing (12) comprises a side
wall (26) that comprises accommodating contours (32; 36) for the mounting springs
(34) and for the snap-in elements (38) of the cover ring (20) at the outside of the
side wall (26), and which accommodating contours are recessed towards the inside.
9. Recessed luminaire according to claim 7 or 8, further comprising an aperture attachment
(66) adapted for engaging an edge of an opening (62) of the cover ring (20) at the
back side thereof, wherein the aperture attachment (66) projects from the cover ring
(20) through the opening (62) towards the front side.
1. Einbauleuchte, insbesondere für eine Einbauöffnung einer Möbelplatte, aufweisend:
- ein Gehäuse (12),
- eine Leiterplatte (14), welche wenigstens eine Leuchtdiode (48) trägt, und
- eine aus transparentem Material geformte Abdeckung (18),
wobei die Abdeckung (18) eine Linseneinheit (50) umfasst,
wobei das Gehäuse (12) zur Aufnahme der Leiterplatte (14) und der Linseneinheit (50)
ausgebildet ist,
wobei die Abdeckung (18) Rastelemente (42) aufweist, mit denen die Abdeckung am Gehäuse
(12) verrastbar ist, und
wobei die Abdeckung (18) Befestigungsfedern (34) zur Befestigung der Einbauleuchte
(10) in einer Einbauöffnung (60) einer Möbelplatte aufweist.
2. Einbauleuchte nach Anspruch 1, bei der die Abdeckung (18) zur Anordnung der Linseneinheit
(50) in dem Gehäuse (12) in einer am Gehäuse verrasteten Stellung der Abdeckung (18)
eingerichtet ist, in welcher Stellung die Befestigungsfedern (34) außenseitig von
einer Seitenwand (26) des Gehäuses (12) angeordnet sind.
3. Einbauleuchte nach Anspruch 1 oder 2, bei der die Befestigungsfedern (34) jeweils
einen von einem vorderseitigen Abschnitt der Abdeckung (18) nach hinten verlaufenden
ersten Abschnitt (56) und einen weiter außen zurück zur Vorderseite verlaufenden zweiten
Abschnitt (58) aufweisen, wobei zwischen der jeweiligen Befestigungsfeder (34) und
der Linseneinheit (50) ein Zwischenraum zur Aufnahme eines Abschnitts einer Seitenwand
(26) des Gehäuses (12) ausgebildet ist.
4. Einbauleuchte nach einem der vorstehenden Ansprüche, bei der die Abdeckung (18) dazu
eingerichtet ist, in einer am Gehäuse (12) verrasteten Stellung die Leiterplatte (14)
in Anlage an einem Boden (24) des Gehäuses (12) zu halten.
5. Einbauleuchte nach einem der vorstehenden Ansprüche, bei der das Gehäuse (12) aus
Metall ist und an seiner Außenseite Kühlstrukturen (30) aufweist.
6. Einbauleuchte nach einem der vorstehenden Ansprüche, bei der das Gehäuse (12) ein
einstückig aus Metall-Druckguss hergestelltes Gehäuse ist.
7. Einbauleuchte nach einem der vorstehenden Ansprüche, weiter aufweisend einen Abdeckring
(20), der rückseitig vorstehende Rastelemente (38) aufweist, die zum Verrasten des
Abdeckrings (20) an einer Außenseite einer Seitenwand (26) des Gehäuses (12) ausgebildet
sind.
8. Einbauleuchte nach Anspruch 7, bei der das Gehäuse (12) eine Seitenwand (26) aufweist,
die außenseitige Aufnahmekonturen (32; 36) für die Befestigungsfedern (34) und die
Rastelemente (38) des Abdeckrings (20) aufweist, wobei die Aufnahmekonturen nach innen
zurückliegen.
9. Einbauleuchte nach Anspruch 7 oder 8, weiter aufweisend einen Blendenvorsatz (66),
der dazu ausgebildet ist, einen Rand einer Öffnung (62) des Abdeckrings (20) rückseitig
zu hintergreifen, wobei der Blendenvorsatz (66) nach vorne durch die Öffnung (62)
über den Abdeckring (20) übersteht.
1. Luminaire encastré, en particulier pour une ouverture de montage d'une planche de
meuble, comprenant :
- un boîtier (12),
- une carte de circuit (14), qui supporte au moins une diode luminescente (48), et
- un capot (18) formé d'un matériau transparent,
dans lequel le capot (18) comprend une unité de lentille (50),
dans lequel le boîtier (12) est adapté de façon à recevoir la carte de circuit (14)
et l'unité de lentille (50),
dans lequel le capot (18) comprend des éléments d'encliquetage (42), grâce auxquels
le capot peut être verrouillé sur le boîtier (12), et
dans lequel le capot (18) comprend des ressorts de montage (34) pour fixer le luminaire
encastré (10) dans une ouverture de montage (60) d'une planche de meuble.
2. Luminaire encastré selon la revendication 1, dans lequel le capot (18) est adapté
de façon à disposer l'unité de lentille (50) dans le boîtier (12) dans une position
dans laquelle le capot (18) est verrouillé sur le boîtier, position dans laquelle
les ressorts de montage (34) sont disposés à l'extérieur d'une paroi latérale du boîtier
(12).
3. Luminaire encastré selon la revendication 1 ou 2, dans lequel les ressorts de montage
(34) comprennent chacun une première partie (56) s'étendant à partir d'une partie
latérale avant du capot (18) vers le côté arrière, et une deuxième partie (58) s'étendant
davantage de l'extérieur vers le côté avant, dans lequel un espacement pour recevoir
une partie d'une paroi latérale (26) du boîtier (12) est formé entre le ressort de
montage respectif (34) et l'unité de lentille (50).
4. Luminaire encastré selon l'une quelconque des revendications précédentes, dans lequel
le capot (18) est adapté de façon à supporter, dans une position dans laquelle il
est verrouillé sur le boîtier (12), la carte de circuits (14) de façon à reposer sur
un fond (24) du boîtier (12).
5. Luminaire encastré selon l'une quelconque des revendications précédentes, dans lequel
le boîtier (12) est en métal et comprend des structures de refroidissement (30) sur
son extérieur.
6. Luminaire encastré selon l'une quelconque des revendications précédentes, dans lequel
le boîtier (12) est un boîtier injecté en métal moulé d'une seule pièce.
7. Luminaire encastré selon l'une quelconque des revendications précédentes, comprenant
de plus une bague de capot (20), qui comprend des éléments d'encliquetage (38) qui
font saillie sur le côté arrière, et qui sont adaptés de façon à verrouiller la bague
de capot (20) sur un extérieur d'une paroi latérale (26) du boîtier (12).
8. Luminaire encastré selon la revendication 7, dans lequel le boîtier (12) comprend
une paroi latérale (26) qui comprend des contours de réception (32 ; 36) pour les
ressorts de montage (34) et pour les éléments d'encliquetage (38) de la bague de capot
(20) à l'extérieur de la paroi latérale (26), ces contours de réception étant encastrés
vers l'intérieur.
9. Luminaire encastré selon la revendication 7 ou 8, comprenant de plus une fixation
d'ouverture (66) adaptée de façon à venir en prise avec un bord d'une ouverture (62)
de la bague de capot (20) sur le côté arrière de celle-ci, la fixation d'ouverture
(66) faisant saillie à partir de la bague de capot (20) à travers l'ouverture (62)
vers le côté avant.