DE102012206098A1 - Luminaire with a support element for a LED module - Google Patents

Abstract

The invention relates to a luminaire comprising a luminaire housing 6 for receiving an LED module 16, 18 and an optical system for guiding a light emitted by the LED module. In order to simplify the replacement of the LED module 16, 18 and to improve the thermal management, an insert plate 26 is proposed, which has an insert in the installed position facing the lamp housing 6 insert back and one of the insert plate rear side opposite insert plate front side, wherein the LED module 16, 18 on the insert plate front side can be fastened and wherein the insert plate 26 by means of clamping means releasably and flat against the lamp housing 6 can be clamped.

Description

The invention is generally concerned with the use of LED bulbs in lights, especially outdoor lights.

Such LED bulbs have the advantage of a long life and thus higher efficiency, because they can realize the same luminosity with a much lower energy consumption. On the other hand, LED bulbs actually represent a highly concentrated energy converter, which converts a large part of the energy fed into heat, which must be dissipated. The dissipation of this heat is difficult to achieve with the conventional measures in existing lights.

In particular, the invention relates to an outdoor lamp. Outdoor luminaires have the special requirement that these have light distribution curves radiating to the side, so that the lowest possible light shadows occur for a given number of luminaires.

It has now been considered to arrange LEDs or LED modules, that is a plurality of LEDs arranged in rows on a printed circuit board, on a carrier, which is then arranged extending horizontally with the plane defined by the printed circuit board within the luminaire in front of or in a corresponding reflector. But even LEDs have to be replaced sometimes, despite their longer life, even to adapt to different lighting needs. Even in these cases, a simple access of the LED modules is desirable, in particular a direct access by the fitter. In this respect, the invention also deals with the problem of simplifying the installation and maintenance of LED modules.

Currently, the LED modules are screwed substantially horizontally extending into the housing and must have specified or defined provided screw-on points or screw holes, so that no LED modules can be used with deviating Lochbild. In this respect, the mounting position of the LED modules is relatively limited, since only in this arrangement, the screws are reasonably accessible, especially in the overhead mounting. If the limited installation position for the LED modules is bypassed or optimized, the LED module is sometimes incorrectly positioned in relation to the reflector, so that a sub-optimal light distribution curve or the heat transfer behavior of the LED modules is negatively disturbed, so that not the required cooling capacity is provided, which in turn has a negative effect on the life of the LED modules. In this respect, this limits the flexibility of using different LED modules in today's luminaires. Finally, it should be noted that electrically insulating components for the screws for fixing the LED modules allow only limited forces and also deteriorate the heat transfer behavior, as well as acting only on a very limited area compressive force of the screws.

Based on this prior art, the present invention seeks to at least partially avoid these disadvantages and provide a lamp that allows easy replacement of different LED modules and at the same time allows improved thermal management.

This object is achieved according to the invention in that the LED module is mounted on an insert plate, which in turn is clamped by means of clamping against the lamp housing.

The insert plate thus acts in the installed position as a heat transfer element for transmitting the heat generated by the LED module to the luminaire housing, so that virtually all the luminaire housing acts as a heat sink by this surprisingly simple measure, which significantly improves thermal management and the use of voluminous and complex heat sink within makes the luminaire housing superfluous. Since the LED module can be fixed by means of fixing means on the front side of the insert plate, which particularly preferably surround or overlap the edges of the LED module in the installed position, any LED module can be used, which considerably increases the variability. This also has the advantage that the LED module after releasing the fixing means can be axially displaced in relation to the insert plate, so as to align or adapt the light distribution curve as needed in interaction with the associated reflector. In the particularly preferred embodiment, the fixing means comprise clamping strips, which are fixed by means of screws on the front side of the insert plate; most preferably at the bottom and top of each LED module. Finally, the insert plate is preferably designed to be electrically insulating in order to realize the electrical insulation required for product safety.

Preferably, the insert plate is installed with the plane defined by its surface substantially vertically extending into the lamp housing, ie laterally on the side of the lamp housing, so that the rear side disposed in the mounting position rests flat against the wall of the lamp housing. The fixation in the luminaire housing takes place to simplify the installation by releasable fixing means, which in any case essentially so can be actuated that the actuating axis extends vertically to the plane defined by the lamp, so after removal of the lamp cover by direct access to the interior of the lamp is accessible without the installer "screw around the corner" must.

Preferably, the fixing means comprise clamping means which are rotatable about an actuating axis or move along an adjustment axis which extends vertically or substantially vertically in the installed position. To apply the required contact pressure on the retaining plate, the formation of the clamping means has proved to be particularly effective as clamping wedges, which rest in the installed position with one side against the insert plate and with another side against an abutment, which particularly preferably in one piece because of the higher stability Luminaire housing is formed.

Preferably, the clamping means for each insert plate are each formed in pairs and particularly preferably arranged at the two ends of the insert plate.

The particularly preferred embodiment of the support element for the LED modules each comprises two arranged on the sides of the elongated luminaire housing insert plates, each with two paired clamping wedges in the installed position are positioned so that the back walls of the insert plates lie flat in the installed position against the inside of the lamp housing , This configuration ensures that not only the carrier element, but actually the entire lamp housing acts as a heat sink or cooling element for cooling the LED modules. This also offers the possibility in principle, existing lights with conventional bulbs, in the case of outdoor lighting z. As gas discharge lamps to replace with LED module modules or to supplement. It only needs to be retrofitted to the support element according to the invention with an insert plate adapted to the inside of the lamp housing.

To realize a problem-free installation of the insert plate whose rear side and the inside of the lamp housing, against which the insert plate rests in the installation position, preferably formed in pairs geometrically complementary. Particularly advantageous is the formation of pairwise complementary slopes has been found.

A preferred embodiment of the support element according to the invention, which is installed in an outdoor light, is illustrated in more detail in the figures. Show it:

1 a perspective view of a mast cantilever without the mast;

2 : An enlarged view of the mast bracket lamp with removed cover plate and removed reflectors;

3 a cross-section along the line III-III of the luminaire according to 2 , rotated 180 degrees;

4 : a likewise rotated by 180 degrees sectional view along the line IV-IV according to 2 with inserted reflectors.

The as a mast boom light 2 trained outdoor light is in the 1 shown in a perspective view from below without the mast, to which the mast boom lamp 2 by means of a picture on the right side of the luminaire housing 6 outstanding, cylindrical attachment socket 4 fastened in a conventional manner.

The pole boom light 2 consists of an elongated, box-like luminaire housing 6 with rounded edges, which is closed at the top and at its lower side has a light exit opening, which through a light cover 8th comprising a cover disc received in this 10 is closable. This cover 10 closes the two inside the luminaire housing 6 arranged shell-shaped reflectors 12 . 14 as well as the side on the outer walls of the lamp housing 6 arranged LED modules 16 . 18 , which represent the bulbs, dust and waterproof.

The more detailed structure of the interior of the pole boom lamp 2 is in the perspective view with the light cover removed 8th and distant reflectors 12 . 14 in the 2 shown. The luminaire housing 6 is presently designed as a one-piece die-cast aluminum body. This cup-shaped, in installation position upwardly closed and downwardly open die-cast body takes in the installed position the optics, the lamps and the operating devices, the operating devices are covered by an opaque plate. The operating devices themselves are not the subject of this invention and are assumed to be known.

The as LED modules 16 . 18 trained bulbs include flat printed circuit boards 20 on which several LED's 22 are arranged in rows, in this case in four rows, so that the board comprises a total of forty LEDs in a 4 × 10 matrix. With interposition of a Wärmeleitpads 24 are the LED modules 16 . 18 with its back on the insert plate front side of the insert plates 26 applied over the entire surface and by means of screw strips 30 . 32 in the desired relative position on these inserts 26 fixed. The insert plates 26 are formed in the preferred embodiment as extruded aluminum plates, which are formed on the mounting plate front side at least partially as flat or flat as possible to form a contact surface 26a for the LED modules 16 . 18 , and on the opposite mounting plate back to the largest possible contact with the lamp housing 6 are formed. The mounting plate back is so far individual to the internal geometry of the lamp housing 6 adapted to the largest possible transmission of the LED modules 16 . 18 generated heat through the Wärmeleitpad 24 on the insert plates 26 and finally on the luminaire housing 6 to realize. In the present case, the installation position is the luminaire housing 6 facing mounting plate back conically corresponding to the taper on the inside of the lamp housing 6 educated.

The fixation of the inserts 26 within the luminaire housing 6 and pressing against the luminaire housing 6 via clamping wedges 40 where each insert plate 26 each with two clamping wedges 40 . 41 is fixable, the present at the ends of the insert plates 26 attack. For this purpose, the insert plate front side has pressure surfaces at the ends 26b . 26c for the clamping wedges 40 . 41 on. These clamping wedges 40 . 41 include conical pressure surfaces in the installed position with a first side against complementary conical pressure surfaces 26b . 26c the insert plates 26 and with the other side against one piece on the lamp housing 6 molded counter bearing 6a . 6b issue. By screwing in Allen screws 42 . 44 in the luminaire housing 6 becomes a vertical offset of the clamping wedges 40 . 41 in the housing of the housing 6 Realizes and pushes the insert plate 26 thus full-surface and firmly against the conical inner wall of the lamp housing 6 , wherein preferably between the insert plate rear side and the inner wall of the lamp housing, a Wärmeleitpad is also arranged, which is also electrically insulating. Due to this configuration, there is no longer any need for assembly under difficult access to the screws, but instead the Allen screws 42 can be directly tightened to the LED modules 16 . 18 insert or replace.

To achieve the desired light distribution curve are the LED modules 16 . 18 associated shell-shaped reflectors 12 . 14 within the luminaire housing 6 recorded and fixed, which essentially have the shape of a half-shell, but are basically computer-generated free-form surfaces in order to realize tailored as possible to the respective application, a possible flat and uninterrupted Lichtverteilungskurz.

LIST OF REFERENCE NUMBERS

2

Pole mounted luminaire

4

fixing connection

6

luminaire housing

6a

thrust bearing

6b

thrust bearing

8th

light cover

10

cover plate

12, 14

reflector

16, 18

LED module

20

circuit board

22

LED

24

Thermal pad

26

insert plate

26a

contact surface

26b

print area

26c

print area

30

Side rail

32

Side rail

40

clamping wedge

41

clamping wedge

42

Allen screw

44

Allen screw

Claims (10)

Luminaire comprising a luminaire housing for receiving an LED module ( 16 . 18 ) and an optical system for directing one of the LED module ( 16 . 18 ) emitted light, characterized in that this an insert plate ( 26 ), one in the installation position the lamp housing ( 6 ) facing insert plate rear side and one of the insert plate rear side opposite insert plate front side has that the LED module ( 16 . 18 ) is fastened on the insert plate front side and that the insert plate ( 26 ) releasably by means of clamping means and flat against the luminaire housing ( 6 ) is clamped. Luminaire according to claim 1, characterized in that the LED module ( 16 . 18 ) by means of clamping means on the insert plate ( 26 ) is fixable. Luminaire according to claim 2, characterized in that the clamping means screw strips ( 30 . 32 ). Luminaire according to claim 1 to 3, characterized in that the LED module ( 16 . 18 ) on the insert plate ( 26 ) is axially displaceable. Luminaire according to one of the preceding claims, characterized in that the clamping means are designed to be electrically insulating. Luminaire according to one of the preceding claims, characterized in that the clamping means at least one clamping wedge ( 40 . 41 ). Luminaire according to claim 6, characterized in that the clamping wedge is electrically insulating. Insert plate ( 26 ), one in the installation position of a luminaire housing ( 6 ) facing insert plate rear side and one of the insert plate rear side opposite insert plate front side, wherein the insert plate rear side for surface fixation on an inner wall of a lamp housing ( 6 ), and in that the insert plate front side forms a contact surface ( 26a ) for the planar contact of an LED module ( 16 . 18 ) having. Insert plate ( 26 ) according to claim 8, characterized in that the insert plate front side pressure surfaces ( 26a . 26b ) for the attack of clamping wedges ( 40 . 41 ). Insert plate ( 26 ) according to one of the preceding claims, characterized in that the LED module ( 16 . 18 ) displaceable on the contact surface ( 26a ) is fixerbar.

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