EP3209933B1 - Downlight - Google Patents

Description

The present invention relates to a downlight having a ring-like mounting frame to be mounted in the region of a ceiling mounting opening and a so-called light carrier to be fastened to the mounting frame with a lamp head located thereon. In particular, the invention relates to a downlight, in which the light carrier is reversibly attached to this by means of rotation relative to the mounting frame.

As a "downlight" usually lights are designated, which are provided for attachment to a ceiling of a room to be illuminated and designed for a light output predominantly downwards. These are usually so-called. Recessed luminaires, which are thus designed so that they can be installed in the mounting hole of a suspended ceiling element, for example, a so-called. Rigipsdecke.

Such recessed ceiling lights in the form of downlights are known in different configurations. A classic embodiment is that the lamp or the light carrier with the actual lamp head, which then includes the light source (s), is approximately circular. In this case, a ring-like so-called. Mounting frame is then first fixed to the ceiling and the light carrier with the lamp head located thereon then releasably connected to the mounting frame. Such a recessed ceiling light is from the DE 20 2010 002 646 U1 known to the applicant, and further offers the advantage over conventional recessed lighting that further security devices secure the light carrier against accidental unlocking by twisting.

The use of this mounting frame serves to facilitate the installation of the downlight and subsequent repair or maintenance measures. Namely, it is merely the mounting frame firmly connected to the ceiling construction, for example. Via a screw or a special clamp connection and possibly then also at least partially plastered. The actual lamp, however, so the light carrier with the lamp head located thereon, however, is designed such that it can be fastened in a detachable manner to the mounting frame. The actual mounting of the essential components of the downlight can therefore only take place at a later date, when all further preparatory work, esp. Fixing and plastering of the mounting frame are already completed. Furthermore, for a later replacement of the lamp head or the lighting means of the downlight not complete disassembly of all components is required, but it is sufficient if only the light carrier is detached from the mounting frame and removed. The mounting frame itself, however, can remain permanently on the ceiling.

For the solution described above, it is of course necessary that the fixing of the light carrier to the mounting frame is reversible, at the same time, however, the connection is made such that the light carrier with the lamp head located thereon can be quickly, easily and reliably attached to the mounting frame. Esp. In the rotary embodiments discussed in the present invention, fastening means in the form of a screw-type connection, in particular a so-called bayonet connection, have prevailed in which the light carrier is attached to the mounting frame from the underside and then rotated relative thereto. By means of corresponding guide projections, which are usually arranged on the light carrier and engage in guideways of the mounting frame or slide along the top of such guideways, then carried an attachment of the light carrier to the mounting frame. To release the connection of the light carrier must be rotated only in the opposite direction relative to the mounting frame.

This type of bayonet connection described above has proven itself many times in practice in downlights, but in some cases there is the problem that there is no adequate assurance for the mounted on the mounting frame light carrier. This problem exists in particular when the lamp head held by the light carrier again has adjustment possibilities and, for example, can be pivoted and / or rotated relative to it. Often come so-called gimbal lights are used, in which the lamp head with respect to the light carrier rotatable by 360 ° and in addition also pivots. Although the storage of the lamp head in this case such that an adjustment of the lamp head should not affect the attachment of the light carrier to the mounting frame, despite all the risk that when turning the lamp head in one direction, the unlocking of the bayonet lock corresponds, at the same time accidentally the connection between the light carrier and mounting frame is solved. This means that there is a risk that when adjusting the orientation of the lamp head accidentally also the light carrier is released and the lamp falls out of the mounting frame.

The present invention is accordingly based on the object to provide a novel solution in which the above-described problems are avoided.

The object is achieved by a downlight, which has the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

The downlight according to the invention is in turn designed such that the attachment of the light carrier to the mounting frame by means of rotation of the light carrier relative to the mounting frame. This is esp. Provided in the context of a bayonet connection. According to the invention additional securing means are provided, which secure the light carrier in its mounting position, ie in the position attached to the mounting frame, against rotation in unlocking.

According to the present invention, therefore, a downlight is proposed with an annular mounting frame to be mounted in the region of a ceiling mounting opening and a light carrier to be fastened to the mounting frame, wherein the mounting frame and the light carrier are designed such that the fastening by means of rotation of the light carrier relative to the mounting frame, and wherein according to the invention additional securing means are provided which secure the light carrier in a mounting position against rotation in Entriegelungsrichtung, wherein the attachment of the light carrier is carried on the mounting frame by means of a bayonet lock. According to the invention, the securing means further comprise a locking element arranged in particular on the mounting frame, which locking element is blocked in the mounting position of the light carrier by a limiting element arranged in particular on the light carrier. It is provided that the locking element and the limiting element are formed such that upon rotation of the light carrier relative to the mounting frame in the direction of the mounting position, the locking element independently passes or overcomes the limiting element. This is achieved in that the limiting element is formed by a so-called. Run-on slope and at the same time the locking element is mounted vertically adjustable.

Upon rotation of the light carrier relative to the mounting frame for fastening purposes, therefore, the height-adjustable locking element can slide along the ramp and is thereby deflected until it has passed and then snaps back into a corresponding locking position in which the locking element for rotation in the opposite direction by the limiting element or the ramp is blocked. In this way can very simple and with few additional measures, the solution according to the invention can be realized.

The height adjustability of the locking element can, for example, be realized in that the locking element is formed by a locking spring, which is arranged on the mounting frame and has an opening provided for receiving the light carrier interior facing locking projection. The fact that this is a flexible element also ensures that the locking spring, after passing the ramp, automatically jumps to a position in which, in accordance with the present invention, the light carrier is secured against rotation in the unlocking direction.

The arrangement of the various components is preferably designed such that accidental release of the lock according to the invention is prevented. Only by specific measures, this lock can be solved, including, for example, be provided that on the mounting frame an unlocking is formed, which allows the insertion of a tool for lifting the locking spring. For example. This opening can be very narrow, so that only by a very narrow object such as a paper clip or a narrow screwdriver, which must be specifically introduced into this opening, the lock can be solved. On the one hand, this measure provides sufficient security; on the other hand, the effort required to release the lock, if the light carrier is deliberately to be removed from the mounting frame, is not very high.

Another development may also be that additionally a so-called limiting projection is provided by which a rotation of the light carrier in the locking direction is limited. That is, this restricting protrusion represents the end position of the light carrier when being rotated for mounting, and is preferably arranged such that the locking protrusion of the above-mentioned locking spring fits into the clearance between the restricting protrusion and the ramp. As a result, a defined mounting position of the light carrier relative to the mounting frame is achieved.

The light carrier itself can, for example, consist of plastic. It would also be conceivable, however, to make it from a different material, esp. Sheet metal or aluminum.

As already mentioned, the solution according to the invention leads in particular to advantages when the lamp head itself is again adjustable, in particular rotatable, on the light carrier. That is, a particularly preferred embodiment of the present invention are so-called. Kardanleuchten. However, the Concept of the invention, of course, also be used in rigidly arranged on the light carrier lamp heads use.

• Figur 1 die Komponenten eines Ausführungsbeispiels eines erfindungsgemäßen Downlights in Explosionsdarstellung;
• Figur 2 das Downlight gemäß Figur 1 im zusammengesetztem Zustand;
• Figur 3 die Ausgestaltung eines Einbaurahmens des Downlights;
• Figur 4 die als Verriegelungselement zum Einsatz kommende Verriegelungsfeder;
• Figur 5 den Einbaurahmen mit daran befindlichen Elementen zur Befestigung an einer abgehängten Decke;
• Figur 6 eine vergrößerte Ansicht der an dem Einbauring befestigten Verriegelungsfeder;
• Figur 7 die Ansicht eines Lichtträgers mit daran befindlichen Komponenten zur Realisierung der erfindungsgemäßen Verdrehsicherung;
• Figur 8 eine vergrößerte Ansicht eines Teilbereichs des Lichtträgers von Figur 7;
• Figur 9a und 9b die Schritte beim Befestigen des Lichtträgers an dem Einbaurahmen gemäß der vorliegenden Erfindung und
• Figuren 10a und 10b die Vorgehensweise zum Lösen der Verriegelung.

The invention will be explained in more detail with reference to the accompanying drawings. Show it:

• FIG. 1 the components of an embodiment of a downlight according to the invention in an exploded view;
• FIG. 2 the downlight according to FIG. 1 in the assembled state;
• FIG. 3 the design of a mounting frame of the downlight;
• FIG. 4 the locking spring used as a coming locking spring;
• FIG. 5 the mounting frame with it's elements for attachment to a suspended ceiling;
• FIG. 6 an enlarged view of the attached to the mounting ring locking spring;
• FIG. 7 the view of a light carrier with components thereon for the realization of the anti-rotation device according to the invention;
• FIG. 8 an enlarged view of a portion of the light carrier of FIG. 7 ;
• FIGS. 9a and 9b the steps in mounting the light carrier to the mounting frame according to the present invention and
• Figures 10a and 10b the procedure for releasing the lock.

The Figures 1 and 2 show first in different views, the essential components of an inventively designed, generally provided with the reference numeral 100 downlights. This is intended to be mounted in an approximately circular and not shown mounting hole of a suspended ceiling. The light is emitted primarily to the underside of an area to be illuminated. Such downlights are used in a variety of ways, both for the illumination of workplaces and in rooms of public buildings, such as museums and the like.

The attachment of such downlights to a ceiling construction is such that first, a first element is preferably permanently and firmly connected to the ceiling and all other components can be detachably mounted on this first element. As a permanently connected to the ceiling element is a so-called. Mounting frame or mounting frame 50 is used, which is adapted in terms of its shape to the mounting opening of the ceiling, in the present case is thus designed like an annular. As has hitherto been known from the state of the art, the mounting frame 50 has an angled configuration with an outwardly directed circumferential flange 51 resting on the ceiling in the mounted state and a peripheral web 52 extending into or through the opening of the ceiling The circumferential flange region 51, which then forms the actual installation opening for the other components of the downlight with its inner edge, serves to compensate for any irregularities in the ceiling installation opening or to conceal it. Often this flange 51 is partially plastered after attachment to the ceiling, so that a particularly inconspicuous transition between the ceiling and the other elements of the lamp 100 is achieved.

The attachment of such a mounting frame 50 on the suspended ceiling can be done in many ways, for example. Screw are known, which would be conceivable in the present case. In this case, usually, the outwardly projecting portion of the flange 51 has a hole pattern or the like, by which screwing with the plaster ceiling is facilitated. In the illustrated embodiment, however, the attachment is carried out by means of special locking elements 55 which are arranged distributed on the circumference of the mounting frame 50. These locking elements are esp. Formed by height-adjustable and outwardly pivotable tabs, which initially in the in FIG. 1 shown configuration are aligned vertically downwards, so that they can be easily passed through the mounting hole when inserting the mounting frame 50 to the ceiling. Only in the state in which the flange portion 51 rests against the underside of the ceiling, then the locking elements 55 are pivoted outwardly and depressed so that they finally come into abutment against the top of the suspended ceiling. The ceiling is then so clamped between the locking elements 55 on the one hand and the outwardly projecting flange portion 51 of the mounting frame 50 on the other hand, so that it is firmly connected to the ceiling. Such locking measures are already known from downlights according to the prior art, which is why they should not be further described below.

In a second step, the assembly of the actual components responsible for the light output of the downlight 100 then takes place. These are located in a so-called lamp head, which in the present case is provided with the reference number 30. The lamp head 30 includes first of all the light sources, for example. In the form of one or more LEDs whose light is emitted by means of a reflector not shown in detail to the bottom. The heat generated during the operation of the light sources heat is discharged by means of a heat sink 31 to the ambient air, which - according to the representations - extends to the top and is arranged in the mounted state within the intermediate area between suspended ceiling and raw ceiling. The power supply of the various components of the lamp head 30 can be effected by means of a separate control and power supply unit or a correspondingly integrated unit.

The lamp head 30 can thus be designed in different ways, for releasable attachment to the mounting frame 50 of this so-called. Light carrier 10 is held, which is designed according to the invention in the manner described in more detail below. In the present case, it is provided that the lamp head 30 is adjustably arranged on the light carrier 10. Esp. in this case, a so-called. Gimbal lamp is to be realized, which thus allows pivoting of the lamp head 30 in different directions, esp. But also allows twisting. Corresponding fastening means which offer such adjustment possibilities are already known from the prior art. Alternatively, it would also be conceivable that the lamp head 30 is held only rotatably on the light carrier 10 or even rigidly arranged on this. Furthermore, an annular aperture 35 is additionally provided in the illustrated embodiment, which is attached for optical reasons on the underside of the light carrier 10. However, this is not absolutely necessary for the realization of the inventive concept.

The releasable attachment of the light carrier 10 to the mounting frame 50 is effected in the present case by a so-called. Bayonet connection. This represents the usual procedure for releasably securing light carriers to the annular mounting frame in downlights. In this case, 50 corresponding guide tracks 53 are provided on the inside of the upwardly directed web 52 of the mounting frame, which are accessible via insertion openings 54 which extend to the underside of the mounting frame 50 out. In the present case, distributed over the circumference of the mounting frame 50 three guide tracks 53 with corresponding insertion openings 54 (see FIG. 3 ), for which purpose correspondingly distributes three corresponding projections on the outer circumference of the light carrier 10 are arranged. The preferably made of plastic light carrier is in this case designed pot-like with a circular base surface on which the attachment of the lamp head 30 takes place, and a circumferential, slightly inclined shell surface on which the bayonet projections are formed.

For fixing the light carrier 10 to the mounting frame 50, the latter is thus attached to the mounting frame 50 from the underside in such a way that the outwardly directed projections engage in the insertion openings 54. Subsequently, the light carrier 10 in the arrow direction (s. FIG. 1 ), so that the projections slide along the tops of the guideways 55 until the end position or mounting position has been reached. In this case, then provide the guideways 53 that the light carrier 10 can no longer fall out of the opening of the mounting frame 50 to the bottom.

Now is the arrangement of the lamp head 30 to the light carrier 10 such that an adjustment of the light output can be made by twisting, there is a risk that upon rotation of the lamp head 30 against the arrow direction of FIG. 1 at the same time the light carrier 10 is rotated in this direction and thereby accidentally the bayonet lock is released. This would mean that the risk exists that when setting the light output accidentally the connection between the mounting frame 50 and light carrier 10 is loosened or even released so far that it can fall out.

In order to prevent this, a special safety mechanism is provided according to the present invention, which is to be described in more detail with reference to the following figures.

A first essential element of the solution according to the invention is a so-called. Locking spring, which in FIG. 4 shown individually and provided with the reference numeral 20. The arrangement of the locking spring on the mounting frame 50 may FIGS. 5 and 6 be taken in more detail.

As can be seen, the locking spring 20 initially has a slightly arcuate, in the later use horizontally oriented web 21, which has a bore 22 at one end and at the opposite end a guide recess 23. Aligned angled to this web 21 is a locking projection 25, which forms a downwardly facing, initially slightly tapered, but then just expiring pin. This projection 25 is on a longitudinal side of the horizontal web 21, from the middle slightly in the direction of Guide opening 23 arranged displaced towards. Overall, the locking spring is formed by a correspondingly punched and later bent sheet metal part.

The arrangement of the locking spring 20 on the mounting frame 50 is in the FIGS. 5 and 6 shown. Esp. It can be seen that via the bore 22, the spring at the corresponding end by means of a screw - or otherwise - is firmly connected to the upper edge of the circumferential ridge 52 of the mounting frame 50. However, on the opposite side of the horizontal web 21 is not fixed, but only arranged such that a formed on the web 52 of the mounting frame 50 guide projection 56 engages in the guide recess 23. This means that here the corresponding end of the locking spring 20 can move up and down in accordance with the double arrow shown, which ultimately means that a vertical deflection of the locking projection 25 can be made. At the upper end of the guide projection 56 in this case a height stop 57 is realized by a secured by means of a screw disc, which limits the possible deflection of the locking spring 20 upwards and secures them accordingly in the guide.

With this locking spring 20 cooperating elements are now also provided on the outer circumference and the lateral surface 11 of the light carrier 10, which esp. The FIGS. 7 and 8 can be removed. An outwardly directed, inclined so-called run-on slope 15 is used, and an additional stop element 17 is slightly spaced therefrom. The distance between the two elements is dimensioned such that at least the lower end region of the locking projection 25 of the locking spring 20 enters the intermediate space 18 can intervene. The two elements 15 and 17 are arranged with respect to their height on the outer circumference of the light carrier 10 such that in the undeflected state of the spring 20, in which so the horizontal web 21 rests against the upper edge of the circumferential ridge 52 of the mounting frame 50, the lower end of the Locking projection 25 protrudes into the intermediate space 18.

The interaction of the different elements can be based on the FIGS. 9a and 9b be followed, showing the attachment of the light carrier 10 to the mounting frame 50. In this case, in a first step, the light carrier 10 is inserted from the bottom into the mounting frame 50 and twisted as described above for producing the bayonet connection. The bayonet connection and the arrangement of the ramp 15 and the end stop 17 are matched to one another such that in the final state of the locking projection 25 in the Intermediate area 18 engages. When rotating in the mounting direction is ensured here by the inclination of the ramp 15 that the locking projection 25 slides on the top of this slope 15 along and thus the spring 20 is automatically deflected upwards (s. FIG. 9a ). However, as soon as the projection 25 has passed the upper end of the ramp 15, the spring 20 folds down again and the locking projection 25 is locked in the intermediate region 18 between the ramp 15 and the end stop 17. A random twisting in the unlocking direction is then blocked by the ramp 15 in this case.

Obviously, the lock can be solved only by the spring 20 raised specifically and accordingly the locking projection 25 is released from the blockage position. For this purpose, according to the representations of Figures 10a and 10b a bore 58 is provided, which extends from the underside of the mounting frame 50 through the web 52 to its upper edge and opens in an area below the horizontal web 21 of the spring 20, immediately laterally of the projection 25. That is, as soon as a pointed tool like For example, a paper clip or a thin screwdriver is passed through the bore 58, with the help of the spring 20, esp. However, the locking projection 25, as in FIG. 10b shown, slightly raised and thus the fuse can be unlocked. In this case, then the light carrier 10 can be rotated to release the bayonet connection in the arrow direction. The height stop 57 in this case ensures that the locking spring 20 always remains in the guidance of the projection 56 even in the raised state.

Ultimately, therefore, by the measures described very simple, but reliable allows a backup of the light carrier to the mounting frame. Since a simultaneous lifting of the locking spring and a rotation of the light carrier is required to release the bayonet connection, preferably only a single locking spring is used. However, this provides a sufficient assurance to prevent an accidental release of the light carrier when adjusting the emission characteristics of the lamp, for example. By turning the lamp head.

Claims (7)

1. Downlight (100) with a ring-like mounting frame (50) to be mounted in the region of a ceiling mounting opening, as well as a light carrier (10) with an attached luminaire head (30) to be fastened to the mounting frame (50), wherein the mounting frame (50) and the light carrier (10) are so designed that mounting is effected by rotation of the light carrier (10) relative to the mounting frame (50),
   wherein additional securing means are provided to secure the light carrier (10) in a mounting position against rotation in the unlocking direction,
   wherein the mounting of the light carrier (10) on the mounting frame (50) is by means of a bayonet lock,
   wherein the securing means comprise a locking element, preferably arranged on the mounting frame (50), which is blocked in the mounting position of the light carrier (10) by a limiting element, preferably arranged on the light carrier (10),
   and wherein the locking element and the limiting element are so designed that when the light carrier (10) is rotated relative to the mounting frame (50) in the direction of the mounting position, the locking element automatically passes the limiting element,
   characterized in that
   the limiting element is in the form of an approach slope (15), while the locking element is mounted to be vertically adjustable.
2. Downlight according to claim 1, characterized in that the locking element is in the form of a locking spring (20), which is arranged on the mounting frame (50) and comprises a locking projection (25) facing the interior space that is to receive the light carrier (10).
3. Downlight according to claim 2, characterized in that an unlocking opening (58) is formed on the mounting frame (50), which allows the insertion of a tool to lift the locking spring (20).
4. Downlight according to claim 2 or 3, characterized in that a height stop (57) is formed on a guide projection (56) on the mounting frame (50) for the locking spring (20) to limit the adjustability.
5. Downlight according to one of the preceding claims, characterized in that a limiting projection (17) is additionally provided to limit rotation of the light carrier (10) in the locking direction.
6. Downlight according to one of the preceding claims, characterized in that the light carrier (10) is made of plastic.
7. Downlight according to one of the preceding claims, characterized in that the luminaire head (30) is arranged to be adjustable, in particular rotatable, on the light carrier (10).

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