DK3263975T3

DK3263975T3 - ILLUMINATION DEVICE

Info

Publication number: DK3263975T3
Application number: DK16177467.4T
Authority: DK
Inventors: Marcus Schütte; Urs Hunziker
Original assignee: Mittelland Gmbh
Priority date: 2016-07-01
Filing date: 2016-07-01
Publication date: 2018-10-01
Also published as: EP3263975B1; EP3263975A1

Description

The invention relates to a luminaire, more particularly a pendulum luminaire, with a light holder, according to the preamble of claim 1 which is suspended in at least one current-conducting hanging device and which can be or is coupled to the power supply via the hanging device.

Luminaires are known in which the light holder or only the light is hung in loops. DE 44 09 651 A1 thus discloses a floor lamp in which two current-conducting hanging devices are tensioned perpendicularly at a defined spacing. The light holders, whose main part is cylindrical, have contact rings at the ends. The hanging devices are each looped once round each one contact ring and supply the light which is fixed on the light holder with current. The light holder can be adjusted in height by turning or sliding the light holder. EP 1 555 479 A1 discloses a luminaire in which the light holder is hung from two current-carrying cables. The suspension is however on the strain relief device in which the power supply is interwoven. The power supply is removed from the braid just above the eyelets in which the cables are suspended, and supplied to a separate connector. DE 20 2016 000 575 U1 and DE 20 20016 000 575 U1 disclose a luminaire in which the light holder is placed in two conductive loops coming from above. The power supply is through the two loops.

The drawback with the luminaires described is that they always require at least two hanging devices in order to feed in the required energy. This restricts the design possibilities for the light holders and also the diversity of the lighting means. US 2016 0 033 098 A1 discloses a light holder resting on two rails being arranged in a v-shaped configuration, said rails being coated with an insulating material and in which energy is transferred inductively. Although there are no contacts that could be subject to corrosion, such a solution is not suitable for direct current applications at low voltages. US 2014 0 268 835 A1 discloses a hanging device with alternating polarity. The light holders comprise this hanging device, wherein the current collectors must be spaced apart from each othe such that each of those touched a section having a different polarity. Although a plurality of light holders may be placed onto this hanging device, they cannot, however, be positioned in an arbitrary manner, as the current collector must be currentless during changing polarity to avoid a short circuit. US 2012/0075857 A1 discloses a luminaire which can be adjusted in its illuminating direction and which is held magnetically and contains a cooling body. The adjustment is possible since a row of contact devices are attached to the light holder and each two come into contact with the current supplies. As a result of the weight of the magnets and cooling body this embodiment is only suitable for a fixed installation on the walls or ceiling.

The object of the invention is to provide a variable luminaire, more particularly a pendulum luminaire which enables a wider design possibility for the light holder and which also enables a greater number of lights which can be switched on and off independently.

This is achieved by a luminaire having the features of claim 1. Preferred embodiments are found in the dependent claims.

According to the invention a luminaire is proposed having preferably at least one light and a light holder which is suspended in at least one current-carrying hanging device and which is or can be coupled to the power supply via the hanging device. The light holder has at least one current collector. The at least one currentcarrying hanging device surrounds at least in part at least one current collector which is in conductive connection with the light, and the at least one current collector has an electrically insulating insulator section. At least two electrically conductive contact devices are provided in the insulator section and are in electrical contact with the light and extend up to the outer side of the insulator section so that it enables an electrical connection with the hanging device. The current-carrying hanging device furthermore has at least two conducting sections which are separated from one another and are at different electrical potentials. By different potentials are meant both permanently different potentials, such as in the case of direct voltage, and also at least temporarily different potentials, such as in the case of alternating voltage. At least two of the contact devices can each be contacted with one of the conducting sections.

With a luminaire of this kind it is possible to supply the power supply through a hanging device of the light holder and thus to the light. This makes it possible to produce luminaires with only one current-carrying hanging device. Thus by way of example mobile luminaires can be installed. With one hanging device the configuration can also designed much more freely since a further stabilizing suspension then only has to act for stabilization and is not restricted by having to provide the power supply. In preferred embodiments it is possible that the light holder has an oblong, more particularly rod or bar-shaped form. The freedom for design is greater with the invention.

By using by way of example two current-carrying hanging devices it is possible to operate two lights independently of one another. It is even possible to supply four entirely different potentials to the light holder. If then one of the potentials is used jointly it is then possible to set up to three individual power circuits in the light holder and thus to control three units, in groups throughout, of lights independently of one another. In general terms, one luminaire can have a plurality of lights and a corresponding number of hanging devices. In a preferred embodiment the lights are controllable independently of one another by a plurality of hanging devices.

Where the current collector of the light holder is enclosed at least in part by a current-carrying hanging device the light holder is supported by the hanging device. An embodiment is preferred in which the current-carrying hanging device surrounds the current collector in a loop. One loop holds the light holder relatively secure even if there are slight shocks or vibrations. j The material of the hanging device ought to be on the one hand electrically conductive but on the other hand also mechanically stable in order to support the light holder. Any type of material or any material combination can be used here which has these two properties. In a preferred embodiment the hanging device is configured as a wire cable, more particularly preferred a steel cable. In order to ) be able to load this wire cable with two different potentials the wire cable has to be separated at one point and re-connected with an insulating material. Particularly preferred for this is the zenith point of the eyelet, thus the lowest point of a hanging wire cable loop. In this case at least one contact device can be connected each time with one of the potentials in order to form the power circuit j for the light.

In a further preferred embodiment the hanging device is formed by a twin strand wire. In this case the strands are insulated from one another and are not insulated from the current collector on either side of the zenith point so that the two ) potentials available can be tapped by the current collector. The insulation of the strands can be different here. By way of example the hanging device can be insulated with the exception of the desired contact region, in another embodiment each one of the strands can be insulated on each side of the hanging device wherein the insulation has to overlap at least a minimum amount at the zenith j point so that no short-circuit is produced by the light holder.

It is likewise possible to form the conductive material somewhat more rigid so that the two lead sections separated by an insulation are guided in parallel. In this case the contact devices would not extend in the current collector transversely to ) the longitudinal direction of the hanging device, but parallel thereto.

The current collector which surrounds the light holder at least in part has the task on the one hand of holding the contact devices so that they can enter into contact with the hanging device, and on the other hand of keeping both the contact devices and also the hanging device away from contacting the remaining light holder. In order to keep the adjustment of the position of the light holder and the lights connected therewith in the horizontal position as flexible as possible, in a preferred embodiment the current collector has a circumferential design. In a particularly preferred embodiment it has a ring-shaped design. The current collector preferably has a circular shape but can equally have a multi-angled, thus polygonal, shape. The shape can also be elliptical or oval. It is important that the current collector clings at least in part closely to the hanging device in order to achieve sufficient electrical contact. On the outside of the current collector facing towards the hanging device the current collector has a plurality of contact projections which are spread, preferably equidistantly, over the circumference. Since two contact devices would be sufficient for operating the luminaire, at least two contacts have to be housed in the current collector. The adjustment possibilities are however restricted with two contacts. The greater the number of contacts so the greater the area which is possible for adjustment.

It can happen here that a contact device comes into contact once with a potential, in another position with the other potential and in a further position with no potential. In order to nevertheless enable the operation of the luminaire, in a preferred embodiment the at least two contact devices are guided to a system of rectifiers so that the at least two different electrical potentials can be “recovered” again.

As is known, rectifiers cause a voltage drop which is generally converted into heat. In order to avoid problems of heat, in a preferred embodiment rectifiers are used which have a voltage drop of less than 0.6 volts, in a particularly preferred embodiment of less than 0.2 volts. In an especially preferred embodiment intelligent rectifiers (smart diodes) are used which make the voltage drop of below 40 mV possible.

Even with the last embodiment described the cooling requirement is low compared with known luminaires so that no great cooling system, more particularly no liquid cooling system, need be installed. In a preferred embodiment a cooling body is j provided between the current collector and the light and surrounds the light at least in some portions. The heat which arises when the light is operated is thus well dissipated.

As mentioned above the light holder is provided with electronic components. It ) has proved expedient to protect these from touch. In a preferred embodiment the light holder is trimmed on its outer side facing at least one hanging device with a trim in at least some sections. On one side the electronic and electrical components are protected from touch, on the other side the trim provides the designer of a luminaire according to the invention with a design possibility. In a j particularly preferred embodiment the trim has a conductive material, more particularly metal. In a particularly especial embodiment the at least one current collector is provided between two sections of the trim.

Particularly in the case of metal trims it is important for the operation of the ) luminaire that no contact occurs between the power supply and the trim. In a particular embodiment the at least one current collector has a receiving device, more particularly a socket groove, for receiving a hanging device, wherein the at least two contact projections extend in the direction of the hanging device at least up to the bottom of the receiving device. The receiving device then has a smaller j circumference than the rest of the current collector so that the hanging device is automatically drawn into the receiving device through the weight of the light holder and thus held away from the edge, namely there where the possibly metal trim is located. Since the hanging device is preferably located practically automatically in the receiving device, the at least two contact projections ought also to extend at ) least up to the bottom of the receiving device in order to be able to create the electrical contact.

In a further preferred embodiment, the guide of the hanging device to the receiving device is assisted by the trim in that the cross-section of the trim tapers on its outer side towards the current collector. Should the hanging device be lifted from the receiving device, through a shock or similar event, tapering of the trim towards the current collector would preferably slide the hanging device there and then bring it with the receiving device up to the desired position.

The invention will now be explained in further detail below with reference to the exemplary embodiments illustrated in Figures 1 to 6.

Fig. 1 shows an exemplary embodiment of a luminaire according to the invention; Fig. 2 shows a cross-section through a light holder in the region of a current collector in conjunction with a hanging device according to a first embodiment;

Fig. 3 shows a rectifier system for the embodiment shown in Fig. 2;

Fig. 4 shows a section of the light holder in the contact region of the current collector and hanging device of a second embodiment according to the invention;

Fig. 5 shows a rectifier system for the embodiment shown in Fig. 4;

Fig. 6 shows an embodiment with two current-carrying hanging devices.

Fig. 1 shows an embodiment of the luminaire 1 according to the invention, illustrated here as a pendulum lamp. In this embodiment the light holder 2 extending in the illustrated example in the horizontal direction X lies in two hanging devices 3, 3a which extend substantially in the vertical direction Z and of which one 3a is current-less. The light holder 2 has a light 25 which is supplied with power via the hanging device 3. The contact between the hanging device 3 and the light holder 2 is shown in Fig. 2 which shows a cross-section (Y-Z plane) through a light holder 2 in the region of the current collector 22. The hanging device 3 is divided into three sections. Starting from the top on the left and right, a first lead section 31 and a second lead section 32 are each assigned a different potential from one another. The two lead sections 31,32 are connected by an insulator 33 at the lower zenith point of the hanging device 3. The current collector 22 of the light holder 2 lies in the loop of the hanging device 3.

This current collector 22 is provided with three contact devices 24. The current collector 22 can also be provided here with two, or more than three, contact devices. It should be ensured that in the desired alignment of the light holder 2 it is ensured that at least one contact device 24 comes into contact with each of the lead sections 31,32. It is not necessary for the contact devices 24 to be arranged spread out uniformly round the circumference of the current collector 22. It is possible throughout to arrange the contact devices 24 non-equidistantly.

The current collector 22 illustrated in Figs. 2 and 3 has at least one insulator section at least in the outer region between the contact devices, this insulator section not being shown in Figs. 2 and 3 for reasons of clarity.

Incorporating the contact devices 24 into the lead system of the light holder 2 takes place as shown in Fig. 3 via a rectifier circuit 40. The contact devices 24 are integrated into the lead system between each two rectifiers 41,42, 43. Depending on the position of the light holder 2 in the hanging device 3 a contact device 24 can move once into contact with the higher potential, in another position with the lower potential or in a further alignment into contact with neither of the potentials.

With this rectifier circuit 40 it is ensured that the potential introduced is integrated into the lead system of the light holder 2 in the desired manner without interference.

Rectifiers 40, 41,42, 43 generally have a voltage drop of barely 0.6 volts which during operation leads to a development of heat which has to be dissipated in order to prevent the circuit from overheating. With a suitable choice of material, it is possible to have the voltage drop of the rectifiers 40, 41,42, 43 drop to below 0.2 volts which reduces the development of heat by the factor 3. Nowadays so-called “intelligent rectifiers” are available wherein a circuit with a MOSFET represents the rectifier function. Such intelligent rectifiers often have a voltage drop which is lower by two magnitudes than that of conventional rectifiers. When using rectifiers of this kind the development of heat of the rectifiers is reduced so that the use of simpler cooling bodies is sufficient for safely operating the luminaire 1.

Fig. 4 shows a sectional view of a further embodiment of the luminaire 1 according to the invention. The illustrated section represents a cross-section transversely to the hanging device 3, thus along the light holder 2 in the region of the current collector 22. In this embodiment the hanging device 3 is formed by a first lead section 31 and a second lead section 32 which are separated in the longitudinal direction by insulation 33. The current collector 22 is designed as a ring around the light holder 2 (not shown). This ring consists of an insulation section 23 in which the contact devices 24 are inserted so that they contact the hanging device 3 when this is placed in the circumferential groove of the current collector 22. In the illustrated example four contact devices 24 are shown. In the arrangement shown here each two contact devices 24 are in contact with each one of the lead sections 31,32. The associated circuit which shows the incorporation of the contact devices into the lead system of the light holder, is shown in Fig. 5. The structure of the incorporation is similar to that shown in Fig. 3. This shows that apart from reasons of space or costs any number of contact devices 24 can be incorporated into the lead system of the light holders 2. A further embodiment of the luminaire 1 according to the invention is shown in Fig.8. Here both hanging devices 3 are each assigned two potentials. In this light holder 2 there are two lights 25 which can be supplied with power independently of one another and thus can be controlled independently of one another. This increases the variability of the luminaire 1.

It should be pointed out that the embodiments described here represent only a limited choice of possible design variations of the invention. It is in particular possible to combine the features of individual embodiments in any suitable way with one another so that with the design variations illustrated in explicit detail here the technical expert can consider many more different embodiments than obviously disclosed.

It is further pointed out that the differentiation made in this description between light and light holder presupposes an exchangeability of the light. Thus at least one of the embodiments contains at least one interchangeable light (eg plug-fitted or screw-fitted) and at least one embodiment equally exists with at least one solid connection between light and light holder (eg by soldering).

REFERENCE NUMERAL LIST 1 Light 2 Light holder 3 Hanging device 3a Hanging device current-free 21 Receiving device 22 Current collector 23 Insulation section 24 Contact device 25 Light 31 First lead section 32 Second lead section 33 Insulator 40, 41,42, 43, 44 Rectifiers

Claims

1. Lighting device (1), more particularly a pendant light device, preferably having at least one light emitter (25) and light emitting holder (2) which hangs in at least one live suspension device (3) and is or can be coupled via the suspension device (3) to the power supply. wherein the light source holder (2) has at least one pantograph (22), wherein the at least one live suspension device (3) encloses at least partially at least one pantograph (22) in conductive communication with a light sensor and the at least one pantograph (22) has an electrically insulating insulating member wherein at least two electrically conductive contact means (24) are provided in the insulating member (23) and are in electrical contact with the light sensor and extending to the outside of the insulating member (23) to permit electrical connection to the suspension device (3) , characterized in that further, the live suspension device (3) has at least two wire sections (31, 32) which are separated from each other. it is via an insulator (33), wherein at least two of the wiring portions (31, 32) are at different electrical potentials and at least two of the contact devices (24) can each be contacted by one of the wiring portions (31, 32).

Illumination device (1) according to claim 1, characterized in that the live suspension device (3) surrounds the current collector (22) in a loop.

Lighting device (1) according to one of claims 1 or 2, characterized in that the suspension device (3) is formed as a cable or two-wire cable.

Lighting device (1) according to one of the preceding claims, characterized in that the current collector (22) has an annular, in particular round, circular or polygonal cross-sectional shape and has on its exterior facing the suspension device (3) a plurality of contact devices (24). ) spread, preferably equidistant, over the circumference.

Lighting device (1) according to one of the preceding claims, characterized in that the light holder (2) is lined on its outside facing the at least one suspension device (3) with a covering at least sectionally.

Lighting device (1) according to claim 5, characterized in that the covering comprises a conductive material, more particularly metal.

Lighting device (1) according to one of claims 5 or 6, characterized in that the at least one pantograph (22) is provided between two sections of the casing.

Lighting device (1) according to one of claims 5 to 7, characterized in that the cross-section of the casing tapers on its outer side towards the current collector (22).

Lighting device (1) according to one of the preceding claims, characterized in that the at least one pantograph (22) has a receiving device (21), more particularly a receiver groove, for receiving a suspension device (3) wherein the at least two contact devices (24) ) extends in the direction of the suspension device (3) at least to the bottom of the receiving device.

Lighting device (1) according to one of the preceding claims, characterized in that the light holder (2) has an elongated, more particularly rod or rod-like shape.

Lighting device (1) according to one of the preceding claims, characterized in that rectifiers (41, 42, 43) are connected between the light sensor and the at least two contact devices (24).

Lighting device (1) according to claim 11, characterized in that the rectifiers (41, 42, 43) have a voltage drop of less than 0.6 volts, more specifically less than 0.2 volts, or are configured as intelligent rectifiers (41, 42, 43).

Lighting device (1) according to one of the preceding claims, characterized in that it has a plurality of light emitters (25) and a corresponding number of suspension devices (3).

Lighting device according to claim 13, characterized in that the light emitters can be controlled independently of each other by the plurality of suspension devices (3).