EP3601883A1

EP3601883A1 - Lamp with adjustable lighting head

Info

Publication number: EP3601883A1
Application number: EP18713638.7A
Authority: EP
Inventors: Christian Kohler; Stephan Pieper
Original assignee: Zumtobel Lighting GmbH Austria
Current assignee: Zumtobel Lighting GmbH Austria
Priority date: 2017-03-27
Filing date: 2018-03-23
Publication date: 2020-02-05
Anticipated expiration: 2038-03-23
Also published as: EP3601883B1; DE202017101752U1; WO2018177925A1; AT16714U1

Abstract

The invention relates to a lamp (100) comprising a first housing (10) in which an operating device is arranged for operating luminous elements, a second housing (20) in which luminous elements are arranged, supply lines extending from the operating device to the luminous elements, and a hinge joint (30) which pivotally connects the second housing (20) to the first housing (10), wherein the hinge joint (30) is sealingly connected to the two respective housings (10, 20) and forms a passage (48) through which the supply lines are installed from the first housing (10) to the second housing (20).

Description

Luminaire with adjustable light head

The present invention relates to a luminaire, which has two housings, one of which serves to receive an operating device for operating light sources and the other forms a light head which includes the luminous means, the light head being adjustably connected to the operating device with respect to the housing. In particular, the present invention relates to an outdoor luminaire.

Lights with an adjustable component for influencing the direction of the light output are known in many ways. Depending on the adjustment in this case different joint structures are used, which allow pivoting of the lighthead to at least one, sometimes even around several axes. In a permanently positioned workstation light, the light output can then be adapted flexibly to the specific application, for example by appropriate alignment of the light head.

In a similar way, a possibility of adjustment of the light head relative to a permanently mounted part of the lamp is also in outdoor lighting advantageous to allow flexible design of the lighting. This applies to street lights, which are intended to illuminate streets or paths, but especially for so-called. Projectors, which serve to illuminate specific areas in the outdoor area or in larger rooms and thus visually highlight. Often, in this case the mounting options for the lamp are limited, which is then compensated by the ability to adjust the light head relative to the rigidly mounted part of the lamp again.

However, especially in the case of luminaires intended for outdoor use, the problem arises that these luminaires must be protected against external influences. In this case, for example, the penetration of dust or moisture in the interior of the lamp should be avoided in order to avoid damage to the electronic components or an undesirable influence on the light output by applying to the translucent parts dirt. In this Context is defined by corresponding standards so-called protection classes, whereby a luminaire intended for outdoor use should meet the protection classes IP 65, 66 or even 67. In previously known solutions, however, the tightness of a lamp is at least temporarily destroyed or weakened by the adjustment of the light head relative to the wider area of the lamp.

The present invention is therefore based on the object to provide a lamp which allows adjustment of the light head, but at the same time is sealed in a reliable manner against external influences.

The object is achieved by a luminaire having the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims. The fiction, contemporary solution provides, the two housing components of the lamp, so a first housing in which an operating device is arranged to operate bulbs, and a second housing, which includes the lighting means to couple via a corresponding joint with each other, which pivoting allows the two housing parts to each other. The joint is each sealed to the two housings and at the same time forms a passage through which supply lines are routed from one of the two housings to the other housing. The supply lines are used to connect the operating device to the bulbs are fiction, however, now positioned and guided so that a reliable and permanent power supply of the light source is ensured by the operating device, but at the same time is also a permanent sealing connection between the two housings.

Thus, according to the invention, a luminaire is proposed having a first housing in which an operating device for operating light sources is arranged, a second housing in which light sources are arranged, supply lines which extend from the operating device to the light bulbs, and a joint which the two housing pivotally interconnects, the joint being respectively sealingly connected to the two housings and forming a passage through which supply lines are laid from the first housing to the second housing. The solution according to the invention allows a simple adjustment of the light head with respect to the further, usually rigidly mounted part of the luminaire, wherein an intact sealing connection is permanently obtained. In this case, it is preferably provided that the joint has a hinge part, which is firmly screwed to one of the two housings and pivotally mounted relative to the other housing. The pivotable mounting of the joint part relative to the other housing is achieved in particular by the fact that the joint part has a tubular projection which defines a pivot axis of the joint and engages in an opening of the corresponding housing. At the periphery of this projection, a corresponding annular seal is then preferably provided, through which the sealing of the joint part takes place relative to the housing.

In this case, it is further preferably provided that biasing means are provided which press the hinge part in the direction of the pivot axis on a wall region of the housing having the opening. The joint part is thus pressed permanently in the direction of the corresponding housing, so that the seal is effective regardless of the pivoting position of the light head. In order to achieve the desired bias, in this case a clamping element may be provided, which is attached to the housing, against which the hinge part is pivotally mounted, and exerts pressure on the hinge part of the opposite side of the tubular projection. The assembly of the joint according to the invention can in this case be facilitated if a so-called spacer or spacer is arranged between the joint part and the tensioning element. Furthermore, in addition a spring element, in particular a plate spring may be provided, which is arranged between the clamping element and the joint element. Even with any different expansions due to temperature fluctuations, this ensures that permanent pressure is exerted on the joint part in the direction of the seal.

The aforementioned clamping element is preferably sleeve-shaped and arranged in an externally accessible opening of the housing, against which the hinge part is pivotally mounted. In particular, the sleeve-shaped clamping element can be screwed to the housing. By choosing the appropriate Depth of screwing, the contact pressure of the joint part can be varied in the direction of the seal. Ultimately, this will set the force needed to pivot the lighthead. Furthermore, it may be provided in an advantageous manner that the hinge has externally accessible means to lock the light head in a predetermined pivot position. These locking means may initially have a pin which engages through the sleeve-shaped clamping element and engages positively in the joint element. The locking of the joint in the desired position is then achieved by means of an additional toothed disc, which cooperates on the one hand with the pin and on the other hand with the housing. For this purpose, a screw may further be provided, which extends through the pin to the hinge part and can be screwed with this. By tightening the screw so the toothed disc between pin and housing is clamped and locks the hinge in the appropriate position. A particular advantage in this case is that even when loosening the screw to lock the pivot position, the tightness of the hinge connection is not adversely affected. Even with a complete removal of the screw and the pin, the joint part is pressed by the predetermined by means of the clamping element contact pressure against the housing, so that even in the unlocked state of the joint permanently a sealing connection is ensured.

In addition, a corresponding marking may be provided on the aforementioned pin, which together with corresponding markings on the housing forms a scale for representing the pivoting position of the joint. As a result, the angular position of the light head can be precisely adjusted to a desired value.

A particular advantage of the solution according to the invention also consists in the fact that when adjusting the light or light head this is self-locking in any position. In particular, there is no danger of the head falling down.

As already mentioned, it is preferably in the fiction, contemporary light to an outdoor lamp. However, the fiction, contemporary concept of sealing Connection are also used in lights that are used indoors and where despite all a reliable seal against external influences is desired.

The invention will be explained in more detail with reference to the accompanying drawings. Show it:

Figures 1 - 4 different views of a lamp according to the invention, in which a

Light head is pivotally mounted relative to a first housing;

Figures 5 and 6: representations of the various components of the joint according to the invention;

Figure 7 is a sectional view of the lamp in the assembled state of the joint and

FIG. 8 is an enlarged view of a portion of FIG. 7.

The fiction, contemporary design of a special joint for adjustable support of a light head is described below with reference to a lamp provided for outdoor use, for example, is used for street lighting or as a so-called. Projector can be used. In both cases, the possibility of adjusting the lighthead means that the ultimately realizable lighting can be adapted more flexibly to the current application. However, it should be noted that the special design of the sealing pivotable connection is not limited to lights for outdoor use, but in principle can be used in all types of luminaires, in which an adjustment of the light head compared to a further housing part is desired and despite the adjustability of a adequate sealing against the environment should be achieved.

The light provided in the figures generally by the reference numeral 100 lamp thus consists of two housings, a first housing 10 and a second housing 20, which pivotable about the inventively designed joint 30 with the first housing 10 is connected. The first housing 10 serves to receive electronic components for the supply of light sources. It may therefore be this so-called. Ballasts or converters, which convert the lamp 100 provided externally available supply voltage into a suitable operating voltage for the lamps.

By contrast, the illuminants themselves (not shown) are arranged in the second housing 20, which forms the light head pivotable about the axis I (see Figures 1, 3 and 4). Supply lines, which lead from the operating device to the lighting means, are hereby guided through the joint 30, so that these lines need not be additionally protected by appropriate sealing measures. Decisive for the fiction, contemporary sealing of the lamp 100 against total external influences is the design of the joint 30, which will be described in more detail below. Both housings 10 and 20, apart from the areas provided for connection to the joint 30, are each sufficiently sealed for themselves, so that then the desired protection class can be achieved overall.

Decisive for the entire sealing of the lamp 100 is thus the design of the joint 30, which will be explained in more detail below with reference to FIGS 5-8. FIGS. 5 and 6 show the joint 30 in the disassembled state, whereas the sectional views of FIGS. 7 and 8 show the arrangement of the various joint components resulting in the assembled state.

The arrangement of the joint 30 is in this case in a lateral region of the first housing 10. This basically has a parallelepiped shape, however, is executed in the connection region with a recess which serves to receive on the one hand the joint 30 and on the other hand, the lateral region of the light head 20. For example, as shown in FIGS. 1 to 4, the end region of the light head 20 engages in the lateral recess of the first housing 10, at least in the illustrated basic position. A first essential component of the joint 30 according to the invention is a joint part 40, which is designed in the illustrated embodiment approximately cuboid. The outer shape is in this case selected such that in the basic position of the light head 20 shown in FIGS. 1-4, the side walls 41 and 42 of the joint part 40 are aligned in alignment with the corresponding side walls 11 and 12 of the first housing 10. Of course, however, a different peripheral shape could be selected for the joint part 40.

The joint part 40 is in this case rigidly connected to the light head 20, wherein this connection takes place via a screw connection which can be seen in more detail in FIGS. 7 and 8. In the illustrated embodiment, this two screws 25 are used, depending on the size and thus weight of the light head 20, however, the number of screws 25 can also be adjusted accordingly. It is essential, however, that in the connecting region between light head 20 and joint part 40, a circumferential seal 26 is provided, is ensured by the fact that joint part 40 and light head 20 are rigidly and sealingly connected.

The joint part 40 is also pivotally mounted on the first housing 10, wherein for this purpose the housing 10 in one of the recess for receiving the hinge 30 facing wall 13 has an opening 14 (see Figure 5). This serves to receive a tubular projection 45 on the hinge part 40, which engages in the mounted state in this opening 14. Due to the circular shape of the opening 14 and the circular outer periphery of the projection 45 in this case the rotatable mounting is realized, wherein in the contact area between the projection 45 and the housing 10 in turn a ring seal 46 is provided by the seal in this transition region between the joint part 40 and housing 10 is achieved.

Starting from the tubular projection 45 then extends an angled executed through hole 48 to the connection area with the light head 20, which forms a passage for passing the supply lines between the operating device and lighting means. In order to permanently obtain a sealing connection between the first housing 10 and joint part 40, it must be ensured that the joint part 40 rests against the wall 13 of the first housing 10 with a certain force. This is achieved by special biasing means, which are described in more detail below.

An essential element of the biasing means is in this case a sleeve-like clamping element 50, which is provided on an end portion remote from the joint element 40 with an external thread 51. About this external thread 51, the clamping element 50 can then be screwed to a housing projection 17 of the first housing 10. This projection 17 has a center axis I to the circularly oriented circular opening 18 with a corresponding internal thread. According to the illustrations of FIGS. 4 and 5, therefore, the clamping sleeve 50 can be screwed into the housing projection 17 from the inside of the housing recess. After this is done, the hinge member 40 is inserted with the tubular projection 45 in the opening 14 of the housing 10 and the clamping sleeve 50 in turn screwed partially out in the direction of the hinge part 14 from the housing projection 17. The space remaining between the two elements, ie the joint element 40 and the clamping sleeve 50, is bridged by a spacer 55, which on the one hand rests positively on an end region of the joint part 40 opposite the projection 45, on the other hand has a recess into which the end region of the clamping sleeve opposite the external thread 51 50 engages. The circular recess of the spacer 55 also serves to accommodate a plate spring 57, which is inserted into the recess 56 of the spacer or spacer 55 and a certain flexibility in the power transmission between the clamping sleeve 50 and joint part 40 causes. Any length changes due to temperature differences in the housing 10 can thereby be absorbed and it is ensured that a continuous contact force is exerted permanently on the joint part 40 in the direction of the ring seal 46 via the clamping sleeve 50. The amount of this contact force depends on how far the clamping sleeve 50 has been unscrewed out of the housing projection 17 in the direction of the joint part 40, so that it can be adjusted, with which force a pivoting of the light head 20 relative to the first housing 10. In any case, however, the force is preferably so great that the light head 20 remains in the set angular position and does not automatically swing down.

The use of the spacer 55 is made to bridge the remaining gap between the hinge part 40 and clamping sleeve 50. This clearance is initially required to allow insertion of the joint part 40 in the housing opening 14.

By appropriately adjusting the position of the clamping sleeve 50 so the force required to pivot the light head 20 can be adjusted. Preferably, in this case, the clamping sleeve 50 in the desired position then, for example, secured by a corresponding grub screw. This measure also contributes to the fact that the joint 30 permanently has a corresponding escapement which prevents an independent pivoting of the light head 20.

Despite all, additional measures are provided in the illustrated joint 30 in an advantageous manner that allow locking of the light head 20 in the desired angular position. These first have a pin-like element 60, which is provided at one end region with a plate-like end 61, at the opposite end notches 62 has. These notches 62 are selected such that they allow a positive engagement of this end region of the pin 60 in an opening 47 of the joint part 40 opposite the projection 45. The pin 60 is thus rotated together with the hinge part 40 when pivoting the light head 20.

The pin 60 is moreover designed as a hollow pin, so that in this another screw 65 can be inserted. This is dimensioned longer than the pin 60 itself and engages with its end portion in a further recess 49 in the joint part 40, which tapers the first recess 47 continues. That is, the screw 65 is bolted directly to the hinge part 40 and presses or pulls the pin 60 in the direction of the housing projection 17. Its opening 18 now has an annular contact surface 19, wherein between plate-like end portion 61 of the pin 60 and this contact surface 19th a toothed disc 70 is inserted. When screwing the screw 65 as already mentioned the End region 61 is pulled in the direction of the joint part 40 and thus of the housing projection 17, so that the toothed disc 70 is clamped between contact surface 19 and end portion 61. This results in a final locking of the pin 60 in the corresponding rotational position. Since this engages positively as described in the joint part 40, this is then locked together with the light head 20 in the corresponding position.

With the help of the solution according to the Invention, therefore, ultimately a joint arrangement is created, which is permanently sealed from the environment and allows the protected passage of supply lines from one housing to the other housing of the lamp. It can be set and then locked by the screw 65 temporarily released, the light head 20 is pivoted to the corresponding desired position and tightened in the screw 65 again during the arrangement of the light at its place of use, the pivotal position for the light head 20 and then locked. A decisive advantage of the solution according to the invention consists in the fact that during the adjustment of the pivot position and the subsequent locking there is no risk that the sealing effect in the region of the joint 30 is temporarily canceled. As already mentioned, the sealing effect is effected in particular between the joint part 40 and the housing 10 by the pretensioning sleeve 50, which continuously presses the joint part 40 in the direction of the housing opening 14. However, the position of this biasing sleeve 50 is independent of the loosening of the screw 65, so that even when adjusting and locking the light head 20 permanently a seal is achieved. Even a complete removal of the pin 61 and the screw 65 would not affect the sealing effect of the inventively designed joint 30.

A final peculiarity is also that on the outer surface of the end portion 61 of the pin 60 markings 63 are attached (see Figure 2). These may, for example, form a scale which, together with a marking 64 provided on the housing wall, allow a simple reading of the angular position of the light head 20.

Ultimately, therefore, a particularly comfortable pivoting possibility for the light head of a lamp is created, with the special design of the joint despite everything allows to seal the lamp against external influences and thus achieve desired protection classes.

Claims

claims

1st light (100) with

A first housing (10), in which an operating device for operating light sources is arranged,

A second housing (20), in which bulbs are arranged,

• supply lines, which extend from the operating device to the bulbs, and

A hinge (30) pivotally connecting the second housing (20) to the first housing (10),

wherein the hinge (30) is sealingly connected to the two housings (10, 20) and forms a passage (48) through which the supply lines are laid from the first housing (10) to the second housing (20).

2. Luminaire according to claim 1,

characterized,

in that the joint (30) has a joint part (40) which is screwed to one of the two housings (20) and is pivotably mounted relative to the other housing (10).

3. Luminaire according to claim 2,

characterized,

in that the articulated part (40) has a tubular projection (45) which defines a pivot axis (I) of the articulation (30) and engages in an opening (14) of the corresponding housing (10).

4. Luminaire according to claim 3,

characterized,

in that the joint (30) has biasing means which press the joint part (40) in the direction of the pivot axis (I) onto a wall region (13) of the housing (10) which has the opening (14).

5. Lamp according to claim 4, characterized,

in that the biasing means comprise a clamping element (50) which is fixed to the housing (10) and exerts pressure on the hinge part (40) from the side opposite the tubular projection (45).

6. Luminaire according to claim 5,

characterized,

that between the hinge part (40) and the clamping element (50) from a spacers Abstandshalterelement (55) is arranged.

7. Luminaire according to claim 5 or 6,

characterized,

the biasing means additionally comprise a spring element (57), in particular a plate spring, which is arranged between the tensioning element (50) and the joint element (40).

8. Luminaire according to one of claims 5 to 7,

characterized,

in that the clamping element (50) is sleeve-shaped and an opening (18) of the housing (10) accessible from the outside is arranged, in particular screwed in the housing (10).

9. Luminaire according to one of the preceding claims,

characterized,

the hinge (40) further comprises externally accessible means for locking the hinge (40) in a predetermined pivotal position.

10. Luminaire according to claim 8 and claim 9,

characterized,

in that the locking means have a pin (60) which passes through the sleeve-shaped clamping element (50) and positively engages in the joint element (40).

11. Luminaire according to claim 10,

characterized, in that the locking means further comprise a toothed disc (70) coupled to the pin (60) which cooperates on the one hand with the pin (60) and on the other hand with the housing (10).

12. Luminaire according to claim 11,

characterized,

in that the locking means comprise a screw (65) which extends through the pin (60) to the joint part (40) and can be screwed to it.

13. Luminaire according to one of claims 10 to 12,

characterized,

in that markings (63, 64) are provided on the pin (60) and on the outside of the housing, which markings represent the pivoting position of the joint (40).

14. Luminaire according to one of the preceding claims,

characterized,

that it is an outdoor lamp.