EP3446031B1 - Switchgear cabinet lighting unit having an adjustable lighting means board - Google Patents

Description

The invention is based on a control cabinet light for illuminating an interior of the control cabinet, the control cabinet light having an illuminant circuit board which, in order to vary the radiation direction of the control cabinet light, can take at least a first and a second orientation with respect to a translucent illuminant cover of the control cabinet light. Such a cabinet light is from the KR 101111531 B1 known.

The US 2008/285264 A1 describes such a control cabinet lamp, in which a light-emitting side of the lamp board faces a first wall section of the translucent lamp cover in the first orientation of the lamp board and a second wall section of the translucent lamp cover in the second alignment of the lamp board. Similar lights also describe the US 2010/271804 A1 and the WO 2015/062889 A1 .

The DE 20 2012 009 313 U1 describes a control cabinet lamp with an elongated, cylindrical illuminant, which is guided between end-mounting bases, each with a receptacle for the illuminant. The illuminant is pivotally mounted in the fastening bases around its longitudinal axis, for which purpose a cylindrical receptacle is provided in the fastening bases, the diameter of which is matched to the width of the illuminant.

Switch cabinet lights with adjustable light sources have the advantage that, depending on the application and the required mounting position in the interior of a switch cabinet, they can be adapted to the conditions found for optimal illumination of the switch cabinet interior. The control cabinet lights should also be prepared, if possible, not to radiate outwards from the interior of the control cabinet in order to minimize the tendency of the control cabinet light to glare. For this purpose, in addition to control cabinet lights in which the illuminant is adjustable, control cabinet lights with an adjustable reflector are known from the prior art.

The control cabinet lights known from the prior art have the disadvantage that the adjustability can only be achieved using comparatively complex technical equipment Adjustment mechanisms is achieved. Accordingly, the cabinet lights known from the prior art are complex and therefore costly to manufacture.

It is therefore the object of the invention to propose a control cabinet lamp of the type described in the introduction, in which the adjustability of the direction of radiation of the lamp is achieved with the aid of simple technical means.

This object is achieved by a control cabinet lamp with the features of claim 1. The dependent claims relate to advantageous embodiments of the invention.

Accordingly, it is provided that when the lamp cover is attached, the lamp board extends between a plug-in receptacle of a lamp base and an opposite support structure on an inside of an end face of the lamp cover, the lamp cover having a U-shape in cross section perpendicular to the longitudinal direction and the two wall sections lying opposite one another and extend parallel to one another and are connected to one another from the end face, and the lamp cover is fastened to the lamp base body via two tongue and groove connections. The lamp board can, for example, be set up to be able to be manually moved back and forth between the first and the second alignment. For example, the illuminant board can be designed in the manner of a plug-in circuit board with electrically conductive plug contacts, which in the plug-in receptacle can optionally be in a plug-in receptacle, for example a groove, of the control cabinet lamp in two positions rotated at an angle to one another, in particular in two positions rotated by 180 ° with respect to one another can be included. The lamp cover can be a U-shaped lamp cover with two parallel spaced transparent side walls, to which the lamp board extends in parallel in its two positions rotated by 180 ° and thus in the two positions rotated by 180 ° a first of the two side walls and turns its illuminants, such as LEDs or OLEDs, to a second of the two side walls. Accordingly, the control cabinet light has radiation directions offset by 180 ° to one another in the two orientations of the lamp board. The switching of the lamp board can be done completely without tools.

The lamp cover can be detachably connected to a lamp base body of the control cabinet lamp without tools for simple repositioning of the lamp board, the lamp board being held by the lamp cover in a plug receptacle of the lamp base body in which the lamp board is aligned when the lamp cover is connected to the lamp body.

The translucent lamp cover can furthermore have a support structure facing the lamp board with a groove-shaped receptacle for a longitudinal edge of the lamp board, in which the lamp board is received and supported, when the lamp cover is placed on the main body of the lamp .

The plug-in receptacle of the lamp main body and the groove-shaped receptacle of the lamp cover can be oriented facing each other and each have a run-on slope to promote the precise alignment of the lamp board by placing the lamp cover on the lamp main body.

Furthermore, the lamp board can be an essentially rectangular circuit board with a plurality of lamps such as LEDs or OLEDs arranged on one side, the circuit board via a first of its two longitudinal edges in the plug-in receptacle of the lamp base body and, with the lamp cover connected to the lamp body, with a second of its two Longitudinal edges can be received in the groove-shaped receptacle of the lamp cover.

If the illuminant board is designed in the manner of a circuit card, it can be provided that the illuminants are arranged on one of the opposite sides of the circuit card, while no illuminants are arranged on the other, opposite side of the circuit card. Alternatively, the opposite sides can have different illuminants, for example with regard to their color characteristics or radiation intensity, the different ones Illuminants can be controlled separately on the opposite sides of the circuit board so as to achieve a desired light emission direction and light quality depending on the orientation of the illuminant board and the controlled illuminants.

If the lamp board is a circuit board with lamps on one of its two opposite sides, it can be provided that the lamps face the first wall section of the translucent lamp cover in the first alignment of the circuit board and the second wall section of the translucent lamp cover in the second alignment of the circuit board . For example, the lamp cover can have a U-shape in cross section perpendicular to the longitudinal direction, with two parallel sides, which are connected from a side perpendicular to it, so that the lamp in the two orientations in each case once the one and the other of the two parallel sides faces the U-shaped lamp cover.

With any other design of the lamp cover, in which the lamp cover has two parallel spaced translucent wall sections, the printed circuit board can be aligned in both directions parallel to the wall sections, with the lamps facing a first of the two translucent wall sections in the first alignment of the printed circuit board are, and wherein in the second orientation of the circuit board, the illuminants face a second of the two translucent wall sections.

The control cabinet lamp can furthermore have control electronics for the lamp board, which is contacted via a detachable multipole, in particular bipolar contact with the lamp board in the two orientations of the lamp board. This embodiment of the contacting is particularly expedient if the lamp board is designed in the manner of a plug-in board which is received in a plug receptacle on the lamp body side.

The detachable bipolar contact can, for example, have a pair of spring contact pins on the control electronics side and three spring contact tabs on the illuminant board side, the spring contact pins contacting a first pair of spring contact tabs in the first alignment of the illuminant board, and the spring contact pins contacting a second pair of the spring contact tabs in the second alignment of the illuminant board. The two pairs of spring contact tabs have a common spring contact tab and a different spring contact tab. If the lamp board is designed as an essentially rectangular circuit board, which can be accommodated via its opposite longitudinal edges in two positions in the lamp base body-side plug-in receptacle rotated by 180 ° to one another, then the common spring contact tab should be in the above-mentioned spring contact with two spring contact pins and two pairs of spring contact tabs The direction of connection between the longitudinal edges of the printed circuit board should be arranged centrally, while the two remaining spring contact tabs should be arranged at a distance from one another at a distance from the spring contact pins symmetrically above and below the central spring contact tab.

In particular, if the circuit board has spring contact lugs for contacting the control electronics on its two opposite end faces, the circuit board can also be rotated by 180 ° on the lamp base body in two positions about a rotation axis that extends perpendicularly through the two longitudinal edges of the lamp board be determined.

In order to ensure adequate cooling of the lamp board, it can be provided that the plug-in receptacle in the lamp base body is designed as a groove which extends along the longitudinal direction of the lamp base body, the lamp base body having a heat sink integrally formed on the groove, so that it also forms part of the heat sink the groove is thermally coupled. An illuminant on the illuminant board can be thermally coupled via a thermal conductor to a longitudinal edge of the illuminant board, via which the illuminant board is inserted into the plug receptacle or groove of the lamp main body.

However, it is also conceivable that the lamp board and the lamp cover form a unit, for example by being connected to one another (possibly detachably). In this case, in order to adjust the light emission direction of the lamp, the unit comprising the lamp board and lamp cover can be detached from the lamp base body in one work step and rotated by 180 ° and placed back on the lamp base body 7. The unit is rotated about an axis of rotation that extends perpendicular to the two longitudinal edges of the board through the longitudinal edges.

According to another aspect, a control cabinet lamp has a lamp housing in which control electronics for a lamp board of the lamp are accommodated and on which on one side a lamp base body, which holds the lamp board, is optionally detachably attached via one of its two longitudinal ends, the lamp board, the lamp body and a transparent lamp cover covering the lamp board, which is mounted on the lamp main body, form a unit or are formed in one piece, so that the entire unit of lamp board, lamp main body and lamp cover are fixed to the lamp housing in two positions rotated by 180 ° about an axis of rotation can, wherein the axis of rotation extends perpendicular to the two longitudinal edges of the board through the longitudinal edges, and wherein the control electronics contacts the board in both positions rotated by 180 ° to each other.

Figur 1

eine Ausführungsform der Schaltschrankleuchte im Querschnitt senkrecht zur Längsrichtung;

Figur 2

eine weitere Ausführungsform der Schaltschrankleuchte mit angeschnittenem Lampengehäuse und abgenommener Leuchtmittelabdeckung; und

Figur 3

eine weitere Ausführungsform der Schaltschrankleuchte im Querschnitt senkrecht zur Längsrichtung.

Further details of the invention are explained with reference to the figures below. It shows:

Figure 1

an embodiment of the cabinet light in cross section perpendicular to the longitudinal direction;

Figure 2

a further embodiment of the control cabinet lamp with the lamp housing cut and the lamp cover removed; and

Figure 3

a further embodiment of the cabinet light in cross section perpendicular to the longitudinal direction.

The Figure 1 shows an embodiment of the cabinet light 1 according to the invention, which is cut perpendicular to the longitudinal direction by the lamp cover 3, the lamp board 2 and the lamp body 7. At the end, the control cabinet lamp 1 has a lamp housing 21 in which the control electronics 15 of the lamp board 2 can be accommodated (cf. Figure 2 ).

In addition to the lamp housing 21 with the control electronics accommodated therein, the control cabinet lamp 1 essentially consists of the lamp base body 7, the lamp board 2 plugged onto the lamp main body 7 and the translucent lamp cover 3 surrounding the lamp board 2. It can be seen that the lamp main body 7, the Illuminant board 2 and the illuminant cover 3 cooperate so that in the Figure 1 shown position of the lamp cover 3, where it is fastened to the lamp base body 7 via two tongue and groove connections 20, the lamp board 2 extends straight between a plug receptacle 8 of the lamp body 7 and an opposite support structure 10 on the inside of the end face 9 of the lamp cover 3. The end face 9 connects the opposite and mutually parallel wall sections 4, so that the lamp cover 3 essentially has a U-shape in the cross section shown.

To form the tongue-and-groove connection 20, the lamp base body 7 has a groove on its opposite longitudinal sides, into which corresponding projections on the mutually facing inner sides of the wall sections 4, 6 engage. The support structure 10 formed on the inside on the end face 9 forms a groove-shaped receptacle 11 for a longitudinal edge 12 of the lamp board 2. The circuit card 2 is inserted into the plug receptacle 8 of the lamp main body 7 via an opposite longitudinal edge 12. To remove the lamp cover 3 and to facilitate the placement of the lamp cover 3 on the lamp base body 7 and thus the alignment of the lamp board 2 with respect to the plug-in receptacle 8 and the groove-shaped receptacle 8, the groove-shaped receptacle 11 and / or the plug-in receptacle 8 are easier to place each have a run-on slope 13.

It can also be seen that at least one of the two parallel wall sections 4, 6 has a structuring on its inner side facing the illuminant 14 on the light-emitting side 5 of the illuminant board 2. This is designed in the manner of a Fresnel lens, whereby an improved light emission characteristic of the control cabinet lamp 1 is achieved. The wall sections 4, 6 can have the same or different Fresnel structures, so that the radiation characteristic of the luminaire can be varied by selecting the wall sections 4, 6 facing the lamps 14.

The Figure 2 shows that the circuit board 2 can have a plurality of lamps 14 distributed in the longitudinal direction L of the control cabinet lamp 1 and the lamp board 2. These can be LEDs or OLEDs. In principle, however, all other light-generating means are also suitable which can be arranged and controlled on a printed circuit board or circuit board 2 in the manner shown. The lamp board 2 has at its end facing the lamp housing 21 three spring contact tabs 18, of which the upper one in the illustration and the middle one in the illustration are each contacted by a spring contact pin 17 of the control electronics 15. The spring contact pins 17 and the spring contact tabs 18 thus form a contact between the lamp board 2 and the control electronics 15.

The synopsis of Figures 1 and 2nd illustrates that the lamp board 2 in the two in the Figures 1 and 2nd Embodiments shown in two positions rotated by 180 ° to one another via their opposite longitudinal edges 12 into the plug receptacle 8 of the lamp main body 7 by contacting the Control electronics 15 can be inserted. As can be seen, in the event that the in Figure 2 shown lamp plate 2 is rotated by 180 °, such that the two longitudinal edges 12 of the lamp plate 2 change their position, the two spring contact pins 17 instead of the two spring contact tabs 18 shown in the upper view contact the two lower spring contact tabs 18 shown, which understandably after the Rotating the lamp board 2 by 180 ° would take the position of the two spring contact tabs 18 shown in the illustration and are thus precisely pre-positioned for contacting the spring contact pins 17. For this purpose, the spring contact tabs 18 should be arranged equidistantly in the vertical connection direction between the longitudinal edges 12, while in addition the middle contact tab 18 should be arranged centrally between the two longitudinal edges or on an axis of rotation x of the lamp board 2.

In particular, if the circuit board 2 has spring contact tabs 18 for contacting the control electronics 15 on its two opposite end faces, the circuit board 2 can also rotate in two about a further axis of rotation (y), which extends perpendicularly through the two longitudinal edges 12 of the lamp circuit board 2 extends to 180 ° rotated positions on the luminaire body.

The interaction of lamp board 2, lamp cover 3 and lamp base 7 is again in detail in the Figure 3 shown. As already with regard to the Figure 1 has been described, both the plug receptacle 8 and the groove-shaped receptacle 11 of the support structure 10 can have a run-on bevel 13 in order to facilitate the insertion of the lamp board 2 into the plug receptacle 8 and the groove-shaped receptacle 11 when the lamp cover 3 is placed on the lamp base body 7. Likewise, the tongue and groove connection 20 on the opposite long sides of the lamp main body 7 or on the mutually facing inner sides of the parallel wall sections 4, 6 of the lamp cover 3 can have a run-on bevel 13, on the one hand to facilitate the placement of the cover 3 on the lamp main body 7 and on the other hand to provide a bias voltage with which the lamp board 2 when the lamp cover 3 placed on the lamp base body 7 is held in the plug receptacle 8 and the groove-shaped receptacle 11.

The lamp base body 7 simultaneously forms a heat sink for the lamps 14, for example LEDs or OLEDs, arranged on the lamp board 2. For this purpose, the illuminants 14 are thermally coupled to the plug receptacle 8 via thermal conductors, for example metal strips, so that waste heat accumulating at the illuminants 14 can be released to the lamp base body 7 via the thermal conductors and the plug receptacle 8. For this purpose, the lamp base body 7 has the highest possible heat capacity. The lamp base body 7 is preferably made of a heat-conducting material, such as metal or a suitable engineering plastic.

Finally, it can be seen that the illuminant board 2 has illuminants 14 only on one of its two opposite sides, so that the illuminant board 2 has a light-emitting side 5, while there is no light emission from the opposite side. By inserting the lamp board 2 offset by 180 ° with its respective opposite longitudinal edge 12 into the plug receptacle 8, the orientation of the light-emitting side 5 of the lamp board 2 is also changed, so that it is the first wall section 4 and the second wall section 6 is facing.

In order to further improve the light emission behavior of the control cabinet lamp 1, it can be provided that a reflector 22 is arranged on that of the two wall sections 4, 6, which faces away from the light-emitting side 5 of the lamp board 2. Due to the symmetrical tongue and groove connections 20 on the opposite longitudinal sides of the lamp main body 7, when the lamp board 2 is rotated by 180 °, the lamp cover 3 can be fastened in a position rotated by 180 ° on the lamp main body 7. The reflector 22 on the inside of the first wall section 4 then also changes its position in accordance with the illuminants 14, so that it is the light again radiating side 5 of the lamp board 2 facing away from the lamp board 2.

However, it is also conceivable that the lamp board 2 and the lamp cover 3 form a unit, for example by being connected to one another (possibly detachably). In this case, the unit comprising the lamp board 2 and lamp cover 3 can then be detached from the lamp base body 7 in one step and rotated through 180 ° again on the lamp base body 7 to adjust the light emission direction of the lamp. The unit consisting of lamp board 2 and lamp cover 3 is rotated about a further axis of rotation (y) which extends perpendicular to the two longitudinal edges 12 of the board 2 through the longitudinal edges 12 (cf. Figure 2 ).

The thermal contact between the illuminant board 2 and the plug receptacle 8 and, accordingly, with the lamp base body 7 is further improved by the biasing force exerted on the illuminant board 2 by the interaction of the plug receptacle 8 and the support structure 10, with which the illuminant board 2 is pressed , so that the dissipation of the waste heat generated by the lamps 14 is promoted or promoted.

The features of the invention disclosed in the above description, in the drawing and in the claims can be essential for realizing the invention both individually and in any combination.

Reference list

1

Control cabinet light

2nd

Illuminant board

3rd

Illuminant cover

4th

first wall section

5

Light emitting side

6

second wall section

7

Lamp body

8th

Socket

9

Face

10th

Support structure

11

groove-shaped receptacle

12th

Long edge

13

Ramp

14

Illuminant

15

Control electronics

16

Contacting

17th

Spring contact pin

18th

Spring contact tab

19th

Heatsink

20th

Tongue and groove connection

21

Lamp housing

22

reflector

L

Longitudinal direction

x

Rotation axis / swivel axis of the lamp board

y

further axis of rotation / pivot axis of the lamp board

Claims (13)

1. A switch cabinet light (1) for illuminating the interior of a switch cabinet, comprising a light-emitting circuit board (2) that has at least a first and a second orientation relative to a translucent light cover (3) of the switch cabinet light (1) in order to vary the beam direction of the switch cabinet light (1), wherein a light-emitting side (5) of the light-emitting circuit board (2) faces toward a first wall section (4) of the translucent light cover (3) in a first orientation of the light-emitting circuit board (2) and toward a second wall section (6) of the translucent light cover (3) in a second orientation of the light-emitting circuit board (2), characterized in that, when the light cover (3) is placed, the light-emitting circuit board (2) extends between a plug-in receptacle (8) of a lamp base body (7) and an opposing supporting structure (10) on an inner side of an end face (9) of the lamp cover (3), wherein the light cover (3) has a U-shape in cross section perpendicular to the longitudinal direction and the two wall sections (4, 6) are opposite to each other and extend parallel to each other and are connected to each other by the end face (9), and wherein the light cover (3) is fastened to the lamp base body (7) by means of two tongue-and-groove connections (20).
2. The switch cabinet light (1) according to claim 1, in which the translucent light cover (3) is detachably connected to the lamp base body (7) of the switch cabinet light (1) and, when the light cover (3) is connected to the lamp base body (7), the light-emitting circuit board (2) is held by the light cover (3) in the plug-in receptacle (8) of the lamp base body (7).
3. The switch cabinet light (1) according to claim 2, in which the translucent light cover (3) has, on an end face (9) extending in the longitudinal direction (L) of the light-emitting circuit board (2), on the inside a support structure (10) facing the lioght-emitting circuit board (2) with a groove-shaped receptacle (11) for a longitudinal edge (12) of the light-emitting circuit board (2), in which the light-emitting circuit board (2) is received and supported when the light cover (3) is placed on the lamp base body (7).
4. The switch cabinet light (1) according to claim 2 or 3, in which the plug-in receptacle (8) of the lamp base body (7) and the groove-shaped receptacle (11) of the light cover (3) are aligned so as to face each other, with each having an insertion chamfer (13).
5. The switch cabinet light (1) according to claim 4, in which the light-emitting circuit board (2) is a substantially rectangular printed circuit board with a plurality of light sources (14) that are arranged on one side thereof, wherein the printed circuit board is received with a first of its two longitudinal edges (12 in the plug-in receptacle (8) of the lamp base body (7) and, when the lamp base body (7) is connected to the light cover (3), with a second of its two longitudinal edges in the groove-shaped receptacle (11) of the light cover (3).
6. The switch cabinet light (1) according to any of the preceding claims, in which the light-emitting circuit board (2) is a printed circuit board with light sources (14) on one of two opposite sides of the printed circuit board, with the light sources (14) facing toward the first wall portion (4) of the translucent light cover (3) in the first orientation of the printed circuit board and toward the second wall portion (6) of the translucent light cover (3) in the second orientation of the printed circuit board.
7. The switch cabinet light (1) according to claim 6, in which the light cover (3) has two parallel, spaced-apart translucent wall sections (4, 6), wherein the printed circuit board is aligned parallel to the wall sections (4, 6) in its two orientations, wherein the light sources (14) face toward a first of the two translucent wall sections (4, 6) in the first orientation of the printed circuit board and toward a second of the two translucent wall sections (4, 6) in the second orientation of the printed circuit board.
8. The switch cabinet light (1) according to any of the preceding claims, further comprising control electronics (15) for the light-emitting circuit board (2) that are contacted via a detachable bipolar contact (16) with the light-emitting circuit board (2) in both orientations of the light-emitting circuit board (2).
9. The switch cabinet light (1) according to claim 8, in which the contact (16) has a pair of control electronics-side spring contact pins (17) and three light-emitting circuit board-side spring contact tabs (18), wherein the spring contact pins (17) contact a first pair of spring contact tabs (18) in the first orientation of the light emitting circuit board (2), wherein the spring contact pins (17) contact a second pair of spring contact tabs (18) in the second orientation of the light emitting circuit board (2), and wherein the two pairs of spring contact tabs have a common spring contact tab (18) and a different spring contact tab (18).
10. The switch cabinet light (1) according to any of the preceding claims, in which the plug receptacle (8) in the lamp base body (7) is formed as a groove that extends along the longitudinal direction (L) of the lamp base body (7), wherein the lamp base body (7) has a heat sink (19) that is integrally formed on the groove and is thermally coupled therewith, and wherein a light source (14) on the light emitting circuit board (2) is thermally coupled via a thermal conductor with a longitudinal edge (12) of the light-emitting circuit board (2) via which the light-emitting circuit board (2) is inserted into the groove of the lamp base body (7).
11. The switch cabinet light (1) according to any of the preceding claims, in which the board (2) has spring contact tabs (18) on each of its two opposite end faces for contacting the control electronics (15), so that the board (2) can be fixed on the light base body (7) in two positions that are rotated by 180° about an axis of rotation (y) that extends perpendicularly through the two longitudinal edges (12) of the light-emitting circuit board (2).
12. The switch cabinet light (1) according to any of the preceding claims, in which the light-emitting circuit board (2) and the light cover (3) form a unit, for example by being (optionally detachable) connected, so that, in order to adjust the light beam direction of the switch cabinet light, the unit comprising light-emitting circuit board (2) and light cover (3) can be detached from the lamp base body (7) in a single step and placed again onto the lamp base body (7) rotated by 180°.
13. A switch cabinet light (1), with a light housing (21) in which control electronics (15) for a light-emitting circuit board (2) of the light (1) are accommodated and to one side of which a lamp base body (7) that holds the light-emitting circuit board (2) is optionally detachably fastened via one of its two longitudinal ends, with the light-emitting circuit board (2), the lamp base body (7), and a translucent light cover (3) covering the light-emitting circuit board (2) that is mounted on the lamp base body (7) forming a unit or being integrally formed, so that the entire unit of light-emitting circuit board (2), lamp base body (7), and light cover (3) can be fixed in two positions that are rotated by 180° about an axis of rotation (y) on the light housing (21), with the axis of rotation (y) extending perpendicular to the two longitudinal edges (12) of the board (2) through the longitudinal edges (12), and with the control electronics (15) contacting the board (2) in both positions that are rotated by 180° relative to one another, characterized in that, when the light cover (3) is placed, the light-emitting circuit board (2) extends between a plug-in receptacle (8) of a lamp base body (7) and an opposing supporting structure (10) on an inner side of an end face (9) of the lamp cover (3), wherein the light cover (3) has a U-shape in cross section perpendicular to the longitudinal direction with two wall sections (4, 6) that are opposing each other and extend parallel to each other and are connected to each other by the end face (9), and wherein the light cover (3) is fastened to the lamp base body (7) by means of two tongue-and-groove connections (20).

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