Luminaire, arrangement, particularly door contact switch, circuit board and use

Abstract

A luminaire comprising a circuit board having at least one LED illuminant arranged on the circuit board, wherein the circuit board is arranged in a luminaire housing with a translucent housing section. The circuit board includes a switching device for switching the at least one LED illuminant on and off with at least one reed switch, wherein the reed switch is arranged on the circuit board between at least one power connection and the at least one LED illuminant and is magnetically switchable for disconnecting or connecting a central power supply for the at least one LED illuminant.

Claims

1. A luminaire comprising a circuit board having at least one LED illuminant arranged on the circuit board, wherein the circuit board is arranged in a luminaire housing with a translucent housing section, and having a switching device for switching the at least one LED illuminant on and off, wherein the switching device comprises at least one reed switch which is arranged on the circuit board between at least one power connection and the at least one LED illuminant, wherein the reed switch is magnetically switchable for disconnecting or connecting a central power supply for the at least one LED illuminant, wherein the reed switch bridges a recess in the circuit board, which is arranged between the power connection and the at least one LED illuminant.

2. The luminaire according to claim 1, wherein the entire electronics of the luminaire, including the circuit board, are completely encapsulated in the luminaire housing.

3. The luminaire according to claim 1, wherein the reed switch comprises a tube in which ferromagnetic contact reeds are arranged which are movable by application of a magnetic field.

4. The luminaire according to claim 3, wherein the reed switch is designed as a normally open contact, in which the contact reeds are spaced apart in the rest state, or as an opener, in which the contact reeds touch each other in the rest state.

5. The luminaire of claim 1 wherein the at least one LED illuminant comprises a plurality of LED illuminants.

6. An arrangement comprising a luminaire according to claim 1 and a means for generating a magnetic field, wherein the means for generating a magnetic field is arranged mechanically free from the luminaire, wherein for actuating the reed switch the means for generating a magnetic field and the luminaire are movable relative to each other.

7. The arrangement according to claim 6, wherein the arrangement forms a door contact switch.

8. The arrangement according to claim 6, wherein the luminaire and the means for generating a magnetic field form movement partners which have at least one common, stationary movement end region, wherein the movement partners interact in the stationary movement end region to actuate the reed switch.

9. A method of using the luminaire according to claim 1 in a potentially explosive region in which a potentially explosive atmosphere can occur or occurs.

10. A circuit board having at least one LED illuminant arranged on the circuit board, and having a switching device for switching the at least one LED illuminant on and off, wherein the switching device comprises at least one reed switch which is arranged on the circuit board between at least one power connection and the at least one LED illuminant, wherein the reed switch is magnetically switchable for disconnecting or connecting a central power supply for the at least one LED illuminant, and wherein the reed switch bridges a recess in the circuit board, which is arranged between the power connection and the at least one LED illuminant.

11. The circuit board of claim 10 wherein the at least one LED illuminant comprises a plurality of LED illuminants.

Description

(1) The drawings show as follows:

(2) FIG. 1 shows a longitudinal section through a luminaire according to an exemplary embodiment according to the invention in the region of the reed switch

(3) FIG. 2 shows a cross-section through the luminaire according to FIG. 1 in the region of the reed switch

(4) FIG. 3 shows a side view of the luminaire according to FIG. 1 with a partial section along the circuit board and

(5) FIG. 4 shows a detailed view from FIG. 3 in the region of the switch.

(6) FIG. 1 shows a circuit board 11 with LED luminaires 10, which are arranged on the circuit board 11. The circuit board is part of a luminaire 18, which is shown completely in FIG. 3, i.e. in its entire length. Circuit board 11 is arranged in a luminaire housing 17, namely in the area of a translucent housing section.

(7) The entire electronics of luminaire 18 are completely encapsulated. This means that the luminaire housing 17 is hermetically sealed, so that no contact of the electronics located in the luminaire housing 17, including the circuit board 11, with the environment takes place. The luminaire 18 can therefore be used in potentially explosive regions or in areas where the luminaire is exposed to difficult weather conditions.

(8) The luminaire 18 is part of an arrangement, particularly of a door contact switch, which can be attached to several, in particular two, movement partners, particularly is attached. In the example of the door contact switch, the two movement partners are on the one hand the door and on the other hand the associated door frame or a wall, in which or to which the door is attached.

(9) The luminaire 18 can be attached to the door frame or another stationary component, for example. The counterpart to the luminaire 18, shown in FIGS. 3, 4, which is used to actuate the luminaire, i.e. to switch it on or off, is attached to the door (means 19).

(10) The circuit board 11 has a switching device 12 for switching the LED luminaires on and off. Specifically, the switching device 12 includes a reed switch 13, which is clearly visible in FIGS. 1 to 4. The reed switch 13 is a switch known per se, which comprises a tube 16, in which contact reeds are arranged. The contact reeds are actuated or moved by a magnetic field which acts on the contact reeds.

(11) The reed switch 13 is located between power connections 14 and the LED illuminants 10. The power connections belong to the central power supply of the LED illuminants 10. In other words, the reed switch 13 is located between the power connections 14 and the LED illuminants 10 in such a way that by actuating the reed switch 13, the power supply for the LED illuminants 10 is established or disconnected. The LED illuminants 10 are switched on or off. The power supply of the LED illuminants 10 is provided by conducting paths on the circuit board 11 (not shown), which electrically connect the reed switch 13 and the LED illuminants 10. Other power supply options are possible.

(12) The power connections 14 are contacts that can be connected with a plug. The electrical connection between the power connections 14 and the reed switch 13 is made by wiring or by conducting paths on the board 11.

(13) The circuit board 11 has a recess 15 in the area of the reed switch 13, so that the circuit board 11 can be equipped, for example, with a mechanical switch instead of the reed switch 13.

(14) The circuit board can have several reed switches 13 for switching the LED illuminants 10 on or off.

(15) The arrangement and the door contact switches are shown in FIGS. 3, 4, respectively. The arrangement includes the circuit board 11 shown in FIGS. 1, 2 and the luminaire 18, respectively. In addition, a means for generating a magnetic field 19 is provided, for example in the form of a permanent magnet. Other means for generating a magnetic field 19, for example a coil, are possible.

(16) The circuit board 11 or the luminaire 18 on the one hand and the means for generating a magnetic field 19 on the other hand are mechanically independent of each other, i.e. structurally separated from each other. In other words, the above-mentioned components are not mechanically directly related to each other, but can be handled freely. When the arrangement is installed, the circuit board 11 or the luminaire 18 on the one hand and the means for generating a magnetic field 19 on the other hand form movement partners that can move relative to each other. For this purpose, the above-mentioned components can, for example, be attached to the door or the wall of a switch cabinet. The door and the component of the door contact switch attached to it form a first movement partner. The wall or a door frame or the other component of the door contact switch attached to it form the second movement partner. The movement partners can be moved relative to each other and have at least one common, stationary movement end region 20. In the example of the door this is the closed position. The movement partners cooperate in the stationary movement end region 20 to actuate the reed switch 13. The stationary movement end region 20 is recognizable in FIGS. 3, 4. There it is shown that the means for generating a magnetic field 19 is located directly above the switch 13, so that the reed switch 13 is in the magnetic field. Thus, the luminaire 18 can be operated contactlessly by the reed switch 13 in the desired way, if the door is closed or opened.

LIST OF REFERENCE NUMERALS

(17) 10 LED illuminant 11 Circuit board 12 Switching device 13 Reed switch 14 Power connections 15 Recess 16 Tube 17 Luminaire housing 18 Luminaire 19 Means for generating a magnetic field 20 Movement end region