EP2572138B1 - Light-emitting means for a luminaire - Google Patents

Description

The invention relates to a light source for a lamp with a socket body and a socket cover, the socket cover on the one hand, the arrangement of the socket in a light and on the other hand has latching means which engage releasably in counter-locking means of the socket body and wherein the socket housing has connection contacts for connecting lines and an operating electronics carries, which serves to control a lamp held in the socket.

Sockets for generic bulbs are shown for example in the catalog of the applicant 2008 - 2011, Section 3, "Sockets for compact fluorescent lamps" page 39 and 40 and are offered for example under the item number 26.103. These sockets correspond to the type G24 or GX24 and have an integrated control gear for compact fluorescent lamps to be used.

Such bulbs are used in addition to the general living room lighting, especially in the field of gastronomy and hotel lighting. The gastronomy and hotel industry often aligns their homes with luminaires designed for a specific ambience. These lights are usually found in every building in a company and contribute - among other, style-forming elements - to a certain recognition of the customer.

In order to reduce energy costs, existing incandescent lamps were often replaced by compact fluorescent lamps, so-called "retro-fit lamps". This led to the problem that lamps with integrated ballast and in combination with an Edisonfassung due to their size not in the on Incandescent lamps based lights could be used. In addition, it occasionally came to the theft of comparatively expensive compact fluorescent lamps or to replace incandescent lamps for example by hotel guests.

These problems could be addressed by the use of generic bulbs, since the displacement of the ballast in the socket body allows a significant reduction in the size of the lamps. The use of non-domestic socket / socket systems (e.g., G24, GX24) has reduced the theft frequency of the CFLs used. Using the new sockets or even retrofitting existing luminaires was easy as the new sockets merely had to be clipped onto the sockets usually found in the luminaires.

The development of new lamps, in particular the development of high-performance LED light sources for room and effect lighting, creates a need for corresponding solutions for residential lighting but also especially for the catering and hotel industry.

The object of the invention is therefore to provide a new light source for retrofitting existing lights or for equipping new lights, which has the advantages of the known versions and compact fluorescent lamps and meets the requirements of modern LED light sources.

The object is achieved by a lamp with the features of claim 1, according to which the socket body carries an LED lamp and is provided with an integrated heat sink, which dissipates the heat of operation of a heat conducting element of the LED light source.

This light source first ensures that the operating heat of the LED light source is sufficiently dissipated, which is a prerequisite for a long life of the LED. Due to the supported by the socket body operating electronics, small-sized LED light sources can be used. The proposed invention solution does not require more space than a commercial incandescent lamp. Thus, the retrofitting of existing lights is not a problem. Due to the non-existent standard base / socket systems, the theft risk for the LED light source is low.

Out EP 2163808A1 . DE 20 2009 017728 U1 and US 2006 / 0227558A1 are known LED lamps, which are provided for use in standard Edison sockets with a corresponding threaded socket. These lamps adheres to the aforementioned disadvantage that the size usually does not correspond to the lamp to be replaced. In addition, there is also the danger here that these high-quality aftermarket lamps are exchanged unauthorized against standard lamps. FR 2923286 also shows an LED lamp, which serves to retrofit known versions. Instead of a lamp cap with Edison thread, the lamp disclosed there is provided with a two-pin base. Such bulbs are known as "retro-fit lamps".

Preferred is an embodiment in which the socket body itself is designed as a heat sink. A high cooling capacity with simple frame production is the main advantage of this embodiment.

In a further development of the aforementioned embodiment, it is provided that the socket body is provided at least in sections with externally circumferential, extending in the circumferential direction cooling fins. This fin arrangement promotes air circulation between the ribs in a horizontal illuminant arrangement in a luminaire.

A first variant of the aforementioned embodiment is characterized in that the lighting means with a standardized External thread - for example, according to IEC standard 60399 - is provided, which in conjunction with Überwurfringen the holder of lighting parts, such as lampshades, and additionally has the function of surface enlarging cooling fins, especially if the thread of the socket is reduced compared to the threaded inner diameter of the coupling ring core size has, so that the threaded ridge has an enlarged surface to promote the heat dissipation.

Alternatively, it is provided that the socket body is provided externally circumferentially with lampslängsaxial cooling fins, especially if the radially directed outer surfaces of the cooling fins with threaded portions of a standardized external thread - for example, according to IEC standard 60399 - are provided, which in cooperation with coupling rings of the holder of lighting parts, like lampshades, serves. This cooling rib arrangement promotes air circulation with lamps arranged vertically in a luminaire.

Particularly preferred is an embodiment in which the LED and the socket form a non-destructively non-separable unit. This has the significant advantage that the frame manufacturer is responsible for the assembly of the LED and makes this professional. Here, a defined contact pressure between the LED light source, in particular its heat-conducting element, and the socket-side heat sink is important in order to ensure a sufficient heat transfer. In so far, it is alternatively provided that the socket housing and the LED form a preassembled, structural unit, which is possibly separable using a special tool. The design of the light source as a structural unit of lamp and socket can be realized in particular by an identically dimensioned life of the operating electronics and LED. Since the technical design and the installation of the LED is carried out by the socket manufacturer, this can ensure the manufacturing quality of the light source.

It is conceivable that the LED, with the interposition of a film provided with conductor tracks, is applied directly to a carrier area formed by the socket housing.

It is conceivable that the operating electronics for the LED forms an assembly unit with the LED itself.

It is advantageous if the coupling ring is designed as an additional heat sink or serves as a thermal bridge for dissipating the heat from the socket body to other parts of the lamp.

It is provided that the socket body has a connection for a protective conductor. This is initially advantageous for the production, since more favorable requirements are placed on the electrical insulation when grounding the socket body. In addition, the grounded socket body protects the operating electronics to control the LED from electromagnetic interference. Furthermore, sensitive electrical appliances are protected by a grounded socket body against electromagnetic fields of the operating electronics of the LED.

Fig. 1

Explosionsansicht eines erfindungsgemäßen Leuchtmittels,

Fig. 2

das erfindungsgemäße Leuchtmittel gemäß Figur 1 in zusammengesetzter Form,

Fig. 3

eine perspektivische Ansicht des Fassungskörpers des Leuchtmittels gemäß Figur 1 und 2,

Fig. 4

eine Seitenansicht des Fassungskörpers gemäß Figur 3,

Fig. 5

eine Schnittansicht des Fassungskörpers gemäß Schnittlinie IV-IV in Figur 4,

Fig. 6

die perspektivische Ansicht eines alternativen Fassungskörpers,

Fig. 7

die Seitenansicht des Fassungskörpers gemäß Figur 6,

Fig. 8

eine Schnittansicht des Fassungskörpers in Figur 7 gemäß Schnittlinie VII-VII,

Fig. 9

eine alternative Ausführungsform des erfindungsgemäßen Leuchtmittels,

Fig. 10

ein Axialschnitt der Fassung gemäß Figur 2

To explain the invention, reference is made to the following description of exemplary embodiments. Show it:

Fig. 1

Exploded view of a luminous means according to the invention,

Fig. 2

the illuminant according to the invention FIG. 1 in compound form,

Fig. 3

a perspective view of the socket body of the lamp according to FIG. 1 and 2 .

Fig. 4

a side view of the socket body according to FIG. 3 .

Fig. 5

a sectional view of the socket body according to section line IV-IV in FIG. 4 .

Fig. 6

the perspective view of an alternative socket body,

Fig. 7

the side view of the socket body according to FIG. 6 .

Fig. 8

a sectional view of the socket body in FIG. 7 according to section line VII-VII,

Fig. 9

an alternative embodiment of the luminous means according to the invention,

Fig. 10

an axial section of the socket according to FIG. 2

In the figures, a lighting means according to the invention is provided overall with the reference numeral 10. As far as subsequent embodiments of the invention are described, the term bulbs is understood to mean the entirety of the socket and the lamp.

The light-emitting means 10 is in FIG. 1 shown in an exploded view. In detail, the lighting means 10 initially comprises a socket body 11, which forms a substantially central receiving space 12. In the receiving space 12, a container 13 can be used, which in particular electrically isolates the electronic components of a control gear against the metallic socket body 11. The operating device is provided with the reference numeral 14. A closure cap 15 serves to close the container 13 after assembly of the operating device in its interior. A socket cover 16 is part of the Socket body 11 and its arrangement serves in a lamp, not shown. In order to ground the metallic socket body 11, a protective conductor terminal 17 is provided.

On the socket cover 16 opposite side of the socket body 11 a arranged on a board LED 18 is mounted, the connecting wires 19 are connected to the operating device 14. The LED 18 is secured by screws 20 on the socket body 11. A diffuser 21 covers the LED 18, protects it from damage and can be used by appropriate design of the defined light orientation. The coupling ring 22 serves to hold luminaire parts, such as lampshades, on the socket body 11.

In FIG. 2 the illuminant 10 according to the invention is the FIG. 1 shown in mounted view. The LED 18 is covered by the diffuser 21 which is attached to the socket body 11, touch-safe. The operating device 14 is arranged with its container 13 in the receiving space 12 of the socket body 11. The socket body 11 is closed on the bottom side with the socket cover 16. The female thread 24 having a coupling ring 22 is on the in FIG. 2 Threaded by individual thread segments 23 external thread 35 of the socket body 11 screwed.

In this preferred embodiment form LED light source 18 and the associated socket body 11 a structurally possibly with a special tool separable unit. The frame manufacturer completely pre-assembles the bulb 10. An exchange of the LED 18 by the customer is not provided. This makes the bulb 10 extremely user-friendly and easy to handle. Since the assembly of the LED 18 on the socket body 11 is made professional by the manufacturer, which is to achieve the maximum Life required heat transfer ensured by the LED 18 to a heat sink. The heat transfer is ensured in particular on the correct contact pressure of the LED 18 on the heat sink. As a heat sink used in the described embodiments, in principle, the socket body 11, which is for this purpose made of a suitable material, in particular a metal such as aluminum. However, ceramics with good thermal conductivities are known, so that a ceramic socket body 11 also comes into consideration as a heat sink.

In contrast to the generic state of the art, where socket and lamp form structurally separate units and the lamp is changeable, there is no need in the invention, since the life of the LED 18 corresponds to that of the operating electronics of the operating device 14.

In the FIGS. 3 to 5 is the socket body 11 according to FIGS. 1 and 2 shown in detail.

FIG. 3 is a perspective view of the socket body 11 with a view of the normally closed by the socket cover 16 bottom 12th FIG. 4 is the associated side view. It can be seen in both figures that the socket body 11 has lamp-longitudinally aligned, the socket body surface greatly enlarging cooling fins 25, each of which form a channel 26 lying between them.

The radially outwardly directed surface 27 of the cooling ribs 25 carry threaded segments 23, which together form the external thread 35 of the socket body 11, on which, as already described above, a coupling ring 22 can be screwed. These thread segments 23 with their thread and Gewindestegabschnitten enlarge the Outer surface of the socket body 11 and thus contribute to improved heat dissipation.

The latching means provided with detent pockets 28 of the socket body 11 serve the arrangement of the socket body 11 on the provided with latching tongues 29 socket cover 16. For this purpose, the locking tabs 29 engage in the latching pockets 28 a.

FIG. 5 shows an axial section through the socket body 11 along section line IV-IV in FIG. 4 , This illustration shows, first, that the top of the socket body 11 opposite the socket hood 16 has a planar mounting surface 30 for the arrangement of the LED 18 mounted on a printed circuit board. The holes 31 penetrating the mounting surface 30 serve to hold the printed circuit board by means of screws 20 and to guide the wires 19 into the container 13 holding the operating devices 14. The latter sits in the receiving space 12 of the socket body 11.

The mounting surface 30 is surrounded by a collar 32, which serves as a positioning aid for mounting the LED 18 and a locking groove 33 for attachment of the diffuser 21 is formed.

The lampslängsaxial aligned cooling fins 25 are particularly advantageous in a vertical orientation of the lamp 10. The operating heat of the bulb 10 creates a circulation of air between the cooling fins 25th

The FIGS. 6 to 8 show an alternative embodiment of the socket body 11. This is identical in its basic construction with those of the previous figures. The main difference is the formation of cooling fins and the screwing of the Überwurfringes 22 provided external thread 35. In the following, therefore, only these differences will be discussed.

FIG. 6 is like FIG. 3 a perspective view from below of the socket body 11th FIG. 7 is the associated side view, FIG. 8 represents an axial section corresponding to section line VII-VII in FIG. 7 represents.

Instead of lamp-longitudinal axial cooling channels 25, which carry thread segments 23 on their radially outwardly directed surface 27, the external thread of the socket body 11 forms cooling fins. For this purpose, the Gewindekernmaß compared to the inner diameter of the internal thread 24 of the coupling ring 22 is significantly reduced. The thread 36 has therefore been cut beyond the required extent addition, the thread rib 37 is significantly excessive. In this way, substantially perpendicular to the lamp longitudinal axis L directed, formed by the threaded rib 37 cooling fins are present.

This embodiment of the socket body 11 is particularly suitable for a vertical orientation of the luminous means 10.

An alternative embodiment of the socket body 11 is shown in the overall view of a luminous means 10 in FIG FIG. 9 shown. Here, the socket body 11 comprises a corresponding to the description of the FIGS. 6 to 8 formed threaded portion 38. By a correspondingly reduced core dimension, the threaded rib 37 of the threaded portion 38 forms corresponding cooling ribs.

The socket body 11 additionally forms a cooling section 39, which adjoins directly the mounting surface for an LED 18 located below the diffuser 21. In this area, circumferential grooves 40 are incorporated into the surface of the socket body 11, whereby in Substantially transverse to the lamp longitudinal axis L aligned cooling fins 41 are formed.

The main advantage of this embodiment is the fact that the cooling section 39 is optimized for optimum heat dissipation performance.

FIG. 10 is an axial longitudinal section through the bulb 10 according to FIG. 2 , The above-described components are shown again here. The protective conductor connection chamber 42 is partially formed by the container 13 and partly by a correspondingly machined region of the inner surface of the socket body 11.

The socket body 11 itself is of better thermal conductivity because of a preferred embodiment made of a suitable metal. This is aluminum in particular.

If the luminous means 10 is connected by connecting a protective conductor to the protective conductor connection terminal 17 which is in electrical contact with the socket body 11, the socket body 11 is earthed. This has significant advantages for the operation, since on the one hand the operating electronics of the operating device 14 is protected against external electromagnetic interference. In return, a grounded socket housing 11 protects electronic devices located in the area of the luminous means 10 from the electromagnetic fields of the luminous means 10.

In terms of manufacturing technology, the corresponding safety regulations for grounded metallic socket bodies 11 provide more favorable insulation distances between electrical components and the socket body 11 itself, which is of considerable advantage.

In all embodiments, as far as presentation technology possible, an LED 18 is shown, in which the actual photoelectric element is arranged on a circuit board. Such LEDs 18 are available as standard components, wherein the board is usually an aluminum body, which serves as a heat conducting element for heat dissipation of the LED 18 to a downstream heat sink.

It is provided in an embodiment, not shown, to dispense with such a board. Instead, it is conceivable and of considerable advantage to apply the photoelectric element directly to the mounting surface 30 of the metal socket body 11 with the interposition of an insulating film provided with conductor tracks for the electrical connection. Possible deteriorations of the heat dissipation through the transition from the board of the LED 18 shown in the illustrations to the heat sink serving as the socket body 11 are excluded.

As can be concluded from the above, the lighting device 10 according to the invention realizes many advantages. First, a socket body 11 is provided, which is intended for use in residential lighting, especially for the use of gastronomy and hotel lighting. The currently widely used, intended for compact fluorescent lamps versions can be replaced accordingly and the lights are equipped with small-sized LED light sources. Since the operating electronics are carried by the socket body 11 itself, the bulbs are no larger than the conventionally used Edison lamps. There is even the possibility to make the bulbs more compact. In the event that the LED light source fails, it is easily interchangeable by skilled workers with tools. The advantages of the prior art are retained. The conversion is easy and the theft of the comparatively high quality lamps is low due to the lack of simple screw mounting.

However, the particularly preferred embodiment of the invention is characterized in that the LED light source and the socket body 11 form a possibly with a special tool, but preferably non-destructively non-separable unit. Since the dissipation of the operating heat of LEDs is of essential importance in order to realize the theoretically achievable operating life, care is taken by the manufacturer for a correct design and mounting of the LED on the socket body 11 functioning as a heat sink. It depends in particular on the correct contact pressure between the LED own board and the socket body 11 in order to ensure a good heat transfer. Considering these circumstances, since the life of the LED corresponds to that of the operating electronics, the possibility of a component replacement does not matter. A defective bulb 10 is completely replaced accordingly. This can be easily accomplished by the use of existing in the lights and from the prior art well-known and correspondingly standardized socket covers.

On the advantages of a protective conductor terminal, by means of which the socket body 11 is grounded, has already been discussed in detail.

Ultimately, the use of LEDs, which already carry the operating electronics on their board, offers further significant advantages. First, the assembly is simplified because a separate operating device is not required. In addition, the socket body 11, in which then the receiving space is no longer required, even better construct an optimal heat dissipation.

LIST OF REFERENCE NUMBERS

10

Lamp

11

socket body

12

accommodation space

13

Container

14

control gear

15

cap

16

version hood

17

Ground terminal

18

LED

19

Lead wire

20

screw

21

diffuser

22

Coupling ring

23

thread segments

24

inner thread

25

Lamp longitudinal axial cooling fins

26

channel

27

radially facing outer surface of 25

28

detent pockets

29

locking tabs

30

mounting surface

31

drilling

32

collar

33

locking groove

34 35

external thread

36

thread

37

thread ridge

38

threaded portion

39

cooling section

40

circumferential grooves

41

cooling fins

42

Protective conductor connection chamber

e

enlarged Fig. 10

L

lamp longitudinal axis

Claims (12)

1. Light-emitting means (10) for a luminaire having a socket body (11) which carries an operating device (14) with operating electronics, and having a socket cap (16), wherein said socket cap (16) on the one hand serves for arranging the socket body (11) in a luminaire and on the other hand has latching means which engage in a releasable manner in counter-latching means belonging to the socket body (11), and wherein said socket body (11) has connecting contacts for connecting leads, and wherein the operating electronics serve for activating a lamp held by the socket body (11), wherein said socket body (11) carries an LED light source and is provided with an integrated cooling body which discharges the operating heat from a heat-conducting element belonging to the LED light source and wherein there is mounted, on that end of the socket body (11) which faces away from the socket cap (16), the LED (18) which is arranged on a circuit board and the connecting wires (19) of which are connected to the operating device (14).
2. Light-emitting means according to Claim 1, characterised in that the socket body (11) itself is designed as the cooling body.
3. Light-emitting means according to Claim 1 or 2, characterised in that the socket body (11) is provided, at least in certain sections, with cooling ribs on the external periphery which extend in the peripheral direction.
4. Light-emitting means according to one of Claims 1 to 3, characterised in that the socket body (11) is provided with a standardised external thread (35) - for example in accordance with IEC Standard 60399 - which serves, in interaction with coupling rings (22), for holding parts of the luminaire, such as luminaire screens, and additionally has the function of surface-enlarging cooling ribs.
5. Light-emitting means according to Claim 4, characterised in that the external thread (35) of the socket body (11) has a core size which is reduced, compared to the internal diameter of the thread of the coupling ring (22), so that the threaded bar has a surface which is enlarged for promoting the discharge of heat.
6. Light-emitting means according to Claim 1 or 2, characterised in that the socket body (11) is provided, on the external periphery, with cooling ribs (25) which are directed along the longitudinal axis of the lamp.
7. Light-emitting means according to Claim 6, characterised in that the radially directed external surfaces of the cooling ribs (25) along the longitudinal axis of the lamp are provided with thread sections of a standardized external thread (35) - for example in accordance with IEC Standard 60399 - which serves, in interaction with coupling rings (22), for holding parts of the luminaire, such as luminaire screens.
8. Light-emitting means according to one of the preceding claims, characterised in that the socket housing (11) and the LED light source form a structural unit which cannot be separated in a non-destructive manner.
9. Light-emitting means according to Claim 8, characterised in that the LED (18) is fitted, with the interposition of a film provided with conductor tracks, directly onto a carrier region formed by the socket housing.
10. Light-emitting means according to Claim 9, characterised in that operating electronics for the LED (18) form a mounting unit with the LED (18) itself.
11. Light-emitting means according to one of Claims 4, 5 or 7, characterised in that the coupling ring (22) serves as a thermal bridge for discharging the heat from the socket body (11) to other parts of the luminaire.
12. Light-emitting means according to one of the preceding claims, characterised in that the socket body (11) has a connection for a protective conductor.

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