EP2957815B1 - Light fixture with at least one led strip - Google Patents

Description

The invention relates to a lighting fixture having the features of the preamble of patent claim 1.

It is known, light-emitting diodes - hereinafter called LED or light emitting diodes - to assemble in different designs and sizes to light bars or light tubes, wherein the light tube can be modeled the shape of a neon tube.

From the JP 2011/138741 A a lighting fixture in the form of such a light pipe is known, wherein the LEDs are arranged in a tubular, transparent housing, wherein at the ends of the housing in each case a male electrical connector part is provided. In the housing, the LEDs are mounted on a board, whereby the LEDs emit a directed light. This lighting fixture can serve as a "LED fluorescent tube".

These lighting fixtures in the design of neon tubes are not yet optimally formed and have the disadvantage that the tubular housing is usually formed by a glass tube or a corresponding acrylic glass tube, these tubes are fragile and the lighting fixture can only be operated in the designated tube socket ,

Another technique is to place the LED strips or individual LEDs in profiles and diffuse the light diffusely by means of transparent covers or diffusers.

From the US 8,308,320 B2 is a linear lighting fixture in the form of LED modules known, the individual LED modules are connected together at their ends. The LED modules each have mounted on their top single LEDs. The LEDs are applied to a substrate. The substrate may consist of ceramic, metal, a laminate or other material. The substrate is arranged on a heat-conducting carrier to dissipate the heat. The LEDs are soldered, a connector or an epoxy resin adhesive applied to the substrate. The individual LED modules have at their ends in each case projections and slots, wherein a projection engages in each case in a slot. The LED modules are electrically connected to each other via electrical connection lines, wherein the LED modules are contacted from their ends spaced by means of the electrical connection lines. The interconnections physically bridge the adjacent ends of adjacent LED modules.

From the WO 2011/139768 a lighting fixture with a linear LED array is known, wherein individual LED modules are connected to each other by means of appropriate connecting lines. This embodiment is similar to the US 8,308,320 B2 educated. The LED module has a profile and a cover, wherein the cover engages around the profile side. The cover is designed transparent.

From the DE 202 03 326 U1 is a LED lighting with multiple boards known. The boards are provided with several LEDs. The board is covered with a shrink tube. The shrink tube forms a substantially transparent sheath, wherein the shrink tube covers each board transparent and waterproof. In the shrink tube, the individual boards are connected by a cable.

From the generic DE 20 2012 007 404 U1 For example, a lighting fixture in the form of an LED bar for illuminating bottles is known, wherein on the outside of a rod, a self-adhesive LED strip is wrapped lengthwise. At a lower end of the rod is a cable connected to the LED strip which leads to a voltage source. The LED rod is completely inserted into the bottle through the neck of the bottle. A hole is drilled in the bottle, from which hole the cable leading to the voltage source is led out. Then glass granules are poured into the bottle. Now, when the LEDs are turned on, the glass granules are illuminated and it glows homogeneously.

This lighting fixture has the disadvantage that the lighting fixture is only suitable for a limited insertion area and the LED strip is unprotected.

From the CN 203 463 970 U It is known to encase a lighting fixture in the form of a lamp with a plurality of LEDs with a shrink tube and equip with electrical connection means at both ends, wherein the wiring extends at least partially in the interior of the housing. The lamp uses several LEDs, which are arranged on a circuit board. The board is inserted into a receptacle in a profile, so that the board is held in a corresponding slot and the LEDs are arranged flush with the top of the receptacle. The entire profile including the board and the LEDs are covered by a film, in particular a shrink tube. Instead of a rigid housing, a shrink tube, 0.08 to 0.6 mm thick, is used to keep the interior of the lamp dust-free and watertight packaging. Within the profile, a control device is also arranged. At the ends of the profile in each case a socket for a plug is arranged.

The use of a corresponding profile as a housing for insertion of the board is structurally complex. The insertion of the board with the LEDs in the profile is expensive.

From the GB 2 470 350 A is known to wrap a board with several LEDs with shrink tubing.

From the US8,398,258 B1 It is known to wind a LED strip spirally around a cylindrical core. It is also known to wind two different LED strips spirally. A cylindrical lens is disposed between a lower and an upper end cap and aligned coaxially with the cylindrical core.

From the generic JP 2010 218 714 A For example, a lighting fixture is known, wherein the lighting fixture has a metal pipe and an LED tape is spirally wound around this metal pipe. This lighting fixture should serve as a replacement for the fluorescent tube.

The invention is based on the object to provide a robust and versatile lighting fixture that is insensitive.

This object of the invention is now achieved by a lighting fixture with the features of claim 1.

The lighting fixture has at least one LED strip. The at least one LED strip is arranged on a tube. The tube is coated with the at least one LED strip with shrink tubing as a seal or sheathed. At each of the two ends of the tube, an electrical connection means is arranged, wherein the at least one LED strip and the two electrical connection means are electrically connected via a wiring. The wiring extends at least partially inside the tube.

This has the advantage that, instead of a fragile, transparent acrylic tube or glass tube, a tube serves as a base, which can be made significantly more robust. It is provided for a variety of applications, a very resistant, almost unbreakable lighting fixture in the form of a light tube or light pipe. The electrical connection means and the wiring are arranged inside the tube. This has the advantage that the wiring and the electrical connection means are protected by the pipe. This light tube can be used without external shell directly even under severe conditions without risking breakage.

The cladding with the shrink tube together with the LED strips has the further advantage that the lighting fixture can be easily repaired. If individual LEDs are defective, the shrink tube is cut at the location of the defective LEDs, the defective LEDs are removed and a new piece of the LED strip is glued in place, electrically contacted and the site is covered with a new heat shrink tubing. In this way, the lighting fixture can be repaired in a simple manner even with little use of tools.

The tube is rigid in one embodiment. The tube may be formed as a metal tube. The metal tube forms a good conductor of heat for the removal of heat. In particular, the tube may be formed as an aluminum tube. In a further embodiment, it is possible that the tube is designed to be flexible. For example. The tube may have a wound band, so that the tube is correspondingly flexible. Such or similar pipes are known as cable ducts for lamps or, for example, in the sanitary area as shower hoses and in use.

The at least one LED strip is arranged on the outside of the tube. In a particularly preferred embodiment, the LED strip is glued to the tube. In a preferred embodiment, the LED strip on a self-adhesive film on its back, with which the LED strip is glued to the pipe. After the LED strip is placed on the tube, the tube is coated with the at least one LED strip with the shrink tube. The LED strips are thus arranged between the shrink tube and the tube and connected on the one hand by the shrunken shrink tube and the other by the adhesive connection with the tube and so fixed in their arrangement. Due to the shrink tubing cover, the LED strips are splash-proof. It is conceivable to use several shrink tube layers. The shrink tube preferably extends over the entire length of the tube. The end faces of the tube are not covered with shrink tubing, since corresponding electrical connection means are arranged with contacts. Preferably, the lighting fixture is designed to be waterproof, so that the lighting fixture can also be used under water. The electrical connection means are preferably also water protected in the coupled state with corresponding counterparts.

A spiral winding of the LED strips has the advantage that a uniform 360 ° degree illumination is ensured. Furthermore, a spiral winding has the advantage that so a large number of LEDs are arranged on the surface and thus a large luminosity is achieved. In an alternative embodiment, the LED strips on the tube linear in the longitudinal direction of the Pipe be arranged. As a result, a directed light output can be achieved in particular at an angle of 120 ° degrees. It is conceivable to arrange a plurality of linear arrangements of the LED strips on the tube.

The lighting fixture is preferably for use as a film light. Here, too, the combination of the LEDs with the heat-shrinkable tube cover is advantageous because the illumination body can achieve a color rendering index (CRI) of more than 90 CRI, for example, of 93 CRI. This color rendering index is above the color rendering index of neon tubes, which can achieve, for example, a color rendering index of 89 CRI.

In a preferred embodiment, a plurality of LED strips are arranged on the tube, wherein the LED strips in particular have different light temperatures. The light temperatures can range from 2800 K to 7000 K.

Furthermore, the lighting means is not bound to a particular version. The electrical connection means are designed as a plug connection. The lighting fixture or the corresponding light pipes can be plugged together by means of the connector to long tube arrangements. For example. the lighting fixtures are assembled into tube arrangements up to a length of 10 m.

The electrical connection means are designed as XLR plug. In a particularly preferred embodiment, the electrical connection means are designed as XLR socket and XLR plug. XLR socket and / or plug can be formed in particular three-pole. In an alternative embodiment, the XLR socket and the XLR connector can be formed vierpolig. However, those skilled in the art will be aware of other electrical connection means known in the art. For example, an electrical screw connection means may be provided as the electrical connection means. The electrical screw connection means may be formed by a screw socket or a screw base. The screw socket or the screw base can in particular an E27 thread or an E14 thread (according to DIN 40400) have.

About one of the electrical connection means of the lighting fixture is preferably connected to a power supply. The power supply preferably provides a DC voltage. The power supply in particular provides a DC voltage in the low voltage range. The power supply is preferably operable with 220 volts and / or 110 volts AC. It is conceivable that the power supply has an accumulator. The power supply can in particular have a controllable DC / DC converter.

The LED strips are preferably connected in series. Each LED strip may have a nominal voltage of 12 volts. Now, if two LED strips are connected in series, so this arrangement has a nominal voltage of 24 volts.

The LED strips can be dimmable, with a dimmer can produce different light levels. The dimmer preferably operates with pulse width modulation (PWM). With the dimmer different light levels can be generated. With the corresponding dimmer different light levels can be produced.

In a further embodiment, a battery-powered configuration of the lighting fixture is possible. The mobile lighting solution or battery-powered version can be operated without a supply line. The lighting fixture preferably has an accumulator inside the tube. In the tube at least one accumulator is arranged. The accumulator can be designed as a battery pack. Accessible from the outside, d. H. externally, a switch or an external dimmer is provided. The accumulator may have a voltage of, for example, 12 volts or 24 volts.

Fig. 1

in einer schematischen Darstellung einen Teil eines erfindungsgemäßen Beleuchtungskörpers, nämlich ein Rohr und eine LED-Streifen-Anordnung auf dem Rohr,

Fig. 2

in einer schematischen, teilweise geschnittenen Explosionsdarstellung den Beleuchtungskörper mit dem Rohr und mit zwei elektrischen Verbindungsmitteln und einer Verkabelung, und

Fig. 3

in einer schematischen Explosionsdarstellung den Beleuchtungskörper mit einem Schrumpfschlauch im noch nicht geschrumpften Zustand.

There are now a variety of ways to design and further develop the lighting fixture according to the invention in an advantageous manner. For this purpose may first on the claims subordinate to claim 1 to get expelled. A preferred embodiment of the invention will be explained in more detail with reference to the drawing and the associated description. In the drawing shows:

Fig. 1

2 shows a schematic representation of a part of a lighting fixture according to the invention, namely a pipe and an LED strip arrangement on the pipe,

Fig. 2

in a schematic, partially sectioned exploded view of the lighting fixture with the tube and two electrical connection means and a wiring, and

Fig. 3

in a schematic exploded view of the lighting fixture with a shrink tube in the not yet shrunken state.

In the Fig. 1 to 3 each partial representations of a lighting fixture are visible.

In Fig. 1 It is easy to see that the lighting fixture has a tube 1. The tube 1 is designed in particular as an aluminum tube. On the outside of the tube 1, two LED strips 2 are arranged. The LED strip 2 can also be referred to as an LED strip or as an LED strip. The LED strips 2 each have a plurality of LEDs (not shown). The LED strip 2 forms a flexible board with the LEDs. The LED strips 2 have on their back on a self-adhesive film, wherein the LED strips 2 are glued to the self-adhesive film on the outside of the tube 1.

The LED strips 2 are arranged spirally in the illustrated embodiment. The winding of the LED strips 2 extends from one end of the tube 1 to the other end of the tube first

In Fig. 2 now the tube 1 and a arranged inside the tube wiring or internal wiring is shown. The wiring has several cables 3. The cables 3 extend at least partially inside the tube 1. Das Tube 1 has a contact opening, through which contact opening the cable 3 is guided on the outside of the tube 1 in order to connect the cables 3 with the LED strips 2. The contact opening is preferably arranged in the middle of the tube 1. As a result, the two LED strips 2 are contactable by means of only one contact opening and the LED strips 2 are substantially the same length. The one LED strip 2 forms the winding from the contact opening to one end of the tube 1 and the other LED strip 2 forms the winding from the contact opening to the other end of the tube first

There are now two electrical connection means available. The two electrical connection means are inserted into the tube ends. This installation position is in Fig. 3 shown on the left. The two connection means may in particular be designed as electrical plug connection means. The connecting means are designed such that a plurality of lighting fixtures can be plugged together either directly or via additional adapters. It is conceivable that both connecting means are formed as a male connector means or both connecting means as a female connector means or the one female connector means and the other male connector means male. The connection means can be designed in particular as XLR plug 4 and / or as XLR socket 5. The two connection means are preferably designed as XLR plug 4. The XLR connector 4 and the XLR socket 5 are preferably formed 3-pin.

The connecting means are fixed in the tube 1 by means of appropriate screws 6 (see. Fig. 3 ). The screws 6 are designed in particular as metal screws. The screws are preferably designed as set screws, which has the advantage that in the installed state the grub screws do not protrude beyond the screw opening in the region of the tube ends and thus the risk of damaging the shrink tube 7 is reduced.

Preferably, the shrink tube 7 extends beyond the radially formed in the tube screw holes for the screws 6. Preferably, the winding of the LED strip 2 ends before the screw holes, so that the Screw holes are not covered by LED strips 2. The shrink tube 7 extends from one end of the tube to the other end of the tube. The shrink tube 7 covers the LED strips 2. As a result, the LED strips 2 are arranged waterproof and protected by the sheath.

The winding of the LED strips 2 preferably does not cover the end region of the tube 1, in which the connecting means are used in each case. As a result, the shrink tube 7 is located close to the end region, ie, in the region of the connecting means on the tube 1. In particular, if the tube 1 is designed to be flexible, this is advantageous because it makes the end region with the connecting means stiffer, as a result of which the connecting means can be securely fastened in the end region or in the tube end.

LIST OF REFERENCE NUMBERS

1

pipe

2

LED strip

3

electric wire

4

XLR connector

5

XLR

6

screw

7

shrinkable tubing

Claims (7)

1. Lighting fixture comprising at least one LED strip (2), wherein the at least one LED strip (2) is arranged on the outside of a tube (1), wherein an electrical connecting means is arranged at each of the two ends of the tube, wherein the at least one LED strip (2) and the two electrical connecting means are connected via a cable arrangement, wherein the cable arrangement extends at least partially in the tube interior, wherein the at least one LED strip (2) is arranged on the pipe (1) as a helical winding, wherein the two electrical connecting means are in the form of plug connecting means, characterized in that the tube (1) together with the at least one LED strip (2) are sheathed by a shrink-fit tubing (7), wherein the two electrical connecting means are in the form of an XLR plug (4) and/or in the form of an XLR socket (5).
2. Lighting fixture according to Claim 1, characterized in that the at least one LED strip (2) is adhesively bonded onto the tube (1).
3. Lighting fixture according to either of the preceding claims, characterized in that the LED strip (2) is formed by a printed circuit board comprising a plurality of LEDs, wherein the LED strip (2) has, on the rear side, a self-adhesive film by way of which the LED strip is adhesively bonded onto the tube.
4. Lighting fixture according to one of the preceding claims, characterized in that the at least one LED strip (2) is designed to be dimmable, wherein different light levels can be achieved by a dimmer.
5. Lighting fixture according to one of the preceding claims, characterized in that a plurality of LED strips (2) are arranged on the tube (1), wherein different light temperatures can be produced by the LED strips (2).
6. Lighting fixture according to Claim 5, characterized in that the light temperatures lie in the range of from 2800 K to 7000 K.
7. Lighting fixture according to one of the preceding claims, characterized in that at least one rechargeable battery is arranged in the tube (1), wherein there is an externally accessible switch or dimmer.

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