EP3663636A1 - Luminaire with fixation device for mast assembly - Google Patents

Abstract

The invention relates to a luminaire 1 with a fastening device for mounting on a component, the luminaire 1 comprising a luminaire housing 2 with a light exit side, in which a lamp is arranged, the fastening device comprising a first fastening part 3 and a second fastening part 4, the first and the second fastening part 3, 4 can be rotated relative to one another about an axis of rotation over an angular range in different relative angular positions and in the different relative angular positions the first and second contact surfaces 35, 45 abut one another and the two fastening parts 3, 4 can be fixed in position with one another , wherein one of the two fastening parts 3, 4 has at least one bushing 34 within its contact surface 35, 45 and a fastening means 5 is inserted through the bushing 34 in an operating position. The surface portion 320 is curved and the mounting head has a curved mounting surface that is curved in the same direction as the surface portion 320.

Description

The invention relates to a lamp with a fastening device for mounting on a component according to the preamble of claim 1.

Generic lights are designed to be attached to a component, such as a wall or a lamp mast. In order to do justice to this purpose, generic luminaires on the one hand have a luminaire housing with a light exit side in which a lamp is arranged, and on the other hand a fastening device by means of which the luminaire can be mounted on the component. Such a fastening device has at least two parts, namely a first fastening part and a second fastening part. The first fastening part serves to mount the fastening device on the component, the second fastening part serves to ensure that the luminaire housing can be connected to the first fastening part and thus to the component. In some embodiments, the second fastening part is integrated in one piece in the lamp housing. In some embodiments, the second fastening part is an element that is separate from the lamp housing and can be connected to it. In some known embodiments, the first fastening part has a mounting section which is suitable for receiving a mast spigot. For example This mounting section can then be designed in the manner of a hollow cylinder. In some embodiments, the mounting section is designed in the manner of a plate that can be attached to a wall or a ceiling in a simple manner, for example by means of screws. In any case, the first and second fastening parts are designed to correspond to one another in such a way that they enable the lamp housing to assume different angular positions relative to the component when it is fixed to the component. For this purpose, the first fastening part has a first fastening section which has a first contact surface, and the second fastening part has a second fastening section which has a second contact surface which corresponds to the first contact surface. The first and the second fastening part can be rotated relative to one another about an axis of rotation over an angular range in different relative angular positions, with the first and the second contact surface abutting against one another in the different relative angular positions that can be set within the angular range, and the two fastening parts are fixed in position against one another are fixable. One of the fastening parts has at least one bushing within its contact surface, through which a fastening means, for example a screw or a bolt with an eccentric device, is inserted in an intended operating position and is fastened to a fastening anchor which is provided on the other of the two fastening parts. For example, the fastening anchor can be designed as an external thread for receiving the thread of a screw or as a receptacle for a holding part of the fastening means that corresponds to the receptacle, so that, for example, a latching or jamming between the holding part and the receptacle can be realized. The person skilled in the art is familiar with common fasteners and common, corresponding ones Fastening anchor known. In an operating position, in which a position-fixed mounting of the lamp on a component can be realized by means of the fastening device, a fastening means is inserted through the bushing, which is fixed to the fastening anchor provided on the other of the two fastening parts and with a fastening head against the bushing surrounding, curved surface section presses, wherein the bushing and / or the fastening anchor extends elongated in a direction perpendicular to the axis of rotation. Of course, it is necessary that the fastening head of the fastening means can press against the surface section in all relative angular positions of the first and second fastening parts that are adjustable within the angular range, if the fastening means is fixed to the fastening anchor of the other of the fastening parts. Because by pressing against the surface section of the one fastening part, which of course takes place with a force direction towards the fastening anchor, the first fastening part is pressed with its first contact surface against the second contact surface of the second fastening part. So that a necessary contact pressure can be generated by the fastening head on the surface section, which causes the two contact surfaces to be pressed against one another in such a way that the two fastening parts are held in a fixed position against one another and thus the luminaire housing is held in a fixed position relative to the first fastening part. with which the fastening head presses against the surface section in the operating position, and the contact pressure with which the fastening head presses against the surface section is in each case sufficiently large. In the case of generic lamps, this is achieved by a special configuration of the fastening means and the fastening anchor and of the surface section. For example Known to provide a screw with an exceptionally large bolt diameter as a fastener so that a sufficiently large contact pressure can be generated. It is also known to provide different, mutually angled steps on the surface section, each step corresponding to one of the adjustable angular positions and by providing the steps a sufficiently large contact surface between the fastening head and the surface section can be generated. However, these solutions known in the prior art have various disadvantages. Firstly, the generation of a very high contact pressure requires the realization of a fastening part with fastening anchors made of a high-strength material, which is associated with considerable costs. On the other hand, the approaches known in the prior art require a very large-volume provision of fastening means, fastening anchors and / or surface section, as a result of which the overall configuration of the lamp is large, which is detrimental to the design of the lamp. In particular, if a not inconsiderable angular range is to be provided, over which different angular positions can be set, the approaches described in the prior art bring the disadvantages described to a great extent. In addition, approaches known in the prior art are often difficult for the fitter to handle when he fixes the lamp to a component.

The present invention has for its object to at least partially remedy at least one of the disadvantages of generic lights described above.

As a solution to the described problem underlying the invention, the invention proposes a lamp with the features of claim 1.

The lamp according to the invention has a lamp housing with a light exit side, in which a lamp is arranged. The luminaire according to the invention also has a fastening device which comprises a first fastening part and a second fastening part. The first fastening part has a mounting section for mounting on a component, and the second fastening part is arranged on the lamp housing. The second fastening part can be fixed in position on the lamp housing or can be integrated in one piece in the lamp housing. The first fastening part has a first fastening section which has a first contact surface, and the second fastening part has a second fastening section which has a second contact surface which corresponds to the first contact surface. The first and the second fastening part can be rotated relative to one another about an axis of rotation over an angular range in different relative angular positions. In the different relative angular positions within the angular range, the first and the second contact surfaces lie against one another and the two fastening parts can be fixed to one another in a fixed position. In an operating position in which the two fastening parts are fixed to one another in position and in which the lamp can be fixed or fixed to a component, the two fastening parts are fixed to one another in position and are in a relative angular position previously determined by the fitter. One of the two fastening parts has at least one bushing within its contact surface, and the other of the two fastening parts has a fastening anchor. The lamp according to the invention further comprises a fastening means which is inserted in the operating position through the passage of one of the two fastening parts and which is fixed to the fastening anchor of the other of the two fastening parts and which has a fastening head against one surrounding the passage Surface section presses. The fastening head is encompassed by the fastening means. The bushing and / or the fastening anchor extends oblong in a direction perpendicular to the axis of rotation. For example, the feedthrough can be designed as an elongated hole, for example the feedthrough can have a plurality of feedthrough sections arranged next to one another and possibly spaced apart perpendicularly to the axis of rotation, wherein, for example, a web provided by the surface section is provided between the feedthrough sections. In such an embodiment, in which the elongate passage is realized by several separate passage sections, only discrete angular positions between the two fastening parts are made possible, which are then predetermined by the different passage sections. The fastening anchor can also be either continuous and elongate perpendicular to the axis of rotation or have discrete, spaced fastening anchor sections. The lamp according to the invention can have further features in various embodiments, which are explained above in connection with generic lamps. According to the invention, the surface section is curved and the fastening head has, on its side facing the surface section, with which it presses against the surface section in the operating position, a curved fastening surface which is curved in the same direction as the surface section. In a certain operating position, in which the two fastening parts are in a certain relative angular position to one another, the fastening head presses against the surface section with a certain proportion of its fastening surface. This portion of the fastening area is particularly preferably at least 50 mm ² , in particular at least 80 mm ² . The amount of the area of this section particularly preferably varies the fastening surface by less than 10%, in particular by less than 5%, in particular not at all if the different angular positions are set within the angular range and thus different operating positions are realized. The curved surface section, the curvature of which corresponds to the curvature of the fastening surface of the fastening head, particularly preferably extends over at least 70%, in particular at least 90% of the length of the bushing perpendicular to the axis of rotation, in particular at least at one end of the bushing over the extension of the bushing perpendicularly to the axis of rotation. Particularly preferably, both the surface section and the portion of the fastening surface with which the fastening head presses against the surface section in the operating position extend beyond the bushing in every angular position within the angular range on both sides of the bushing, based on the direction of the axis of rotation a length along the direction of the axis of rotation which is at least 0.5 times, in particular at least 1 times the width of the bushing along the direction of the axis of rotation. Particularly preferably, the surface section extends in the direction of the axis of rotation on both sides of the bushing over the entire length of the bushing perpendicular to the axis of rotation over at least 0.5 times, in particular at least 1 times the width of the bushing in the direction of the axis of rotation . In particular, the surface section on both sides of the bushing extends with respect to the direction perpendicular to the axis of rotation over the bushing with a length which corresponds to at least 0.5 times, in particular at least 1 times the width of the bushing in the direction of the rotational axis .

The luminaire according to the invention has significant advantages over generic luminaires.

Due to the mutually corresponding curved configuration of the surface section and the fastening surface, it is ensured that the fastening head can press against the surface section with as large a surface as possible and thus fix the two fastening parts to one another with high contact pressure. Ultimately, the contact pressure between the two fastening parts is applied by the fastening head, so that the surface with which the fastening head rests on the surface section represents the surface with which a force for generating the pressing force can be generated between the two fastening parts. The provision of the curved, mutually facing surface courses of the surface section and the fastening surface can also simplify the assembly of the lamp on a component, since a fitter can align the fastening head relative to the surface section in a very simple manner in any adjustable angular position within the angular range, that it abuts the surface portion with a large area. In one embodiment, the bushing is provided on the first fastening part and the fastening anchor is provided on the second fastening part. In another embodiment, the bushing is provided on the second fastening part and the fastening anchor on the first fastening part. If the bushing is provided in the first fastening part, the ability to mount the lamp on a component can be particularly simplified, since the fastening means or the fastening head of the fastening means can be easily accessible from the outside. In this embodiment, the fastening anchor, which is provided on the second fastening part, is particularly preferably designed in the manner of a blind hole, so that water and other contaminants cannot penetrate the environment in the luminaire housing can be prevented in a very simple manner. In one embodiment, in which the bushing is provided on the second fastening part, the fastening head can be arranged, for example, in the lamp housing, as a result of which it can be optically concealed in the lamp housing. In this embodiment, too, it may be appropriate to design the fastening anchor, which in this case is provided on the first fastening part, as a blind hole, so that it is as little perceptible from the outside as possible. In further embodiments according to the invention, for example, a plurality of bushings offset from one another and a plurality of fastening anchors offset from one another can be provided, one fastening anchor each being assigned to one bushing. For example, in this case, all bushings can be provided on one of the fastening parts and all fastening anchors on the other of the two fastening parts, or the provision of the different bushings and the different fastening anchors can take place partly on the first fastening part and partly on the second fastening part.

In one embodiment, the fastening surface and the surface section have an arcuate curvature about a curvature axis running parallel to the axis of rotation. The arcuate curvature can ensure in a particularly reliable and simple manner that the fastening head, in any possible relative angular position within the angular range, always rests on the surface section in the operating position with an at least substantially equal area. In each relative angular position of the two fastening parts relative to one another, the fastening head is particularly preferably in contact with the surface section with more than 70% of its fastening surface, in particular with more than 90%, within the angular range. its mounting surface. The mounting surface of the mounting head is the surface of the side of the mounting head that points to the surface section in the operating position. The radius of curvature of the circular arc-shaped curvature particularly preferably deviates by less than 20%, in particular by less than 10%, from the length of an imaginary connecting line which can be defined in any relative angular position within the angular range and which is perpendicular to the axis of rotation and perpendicular to the surface section strikes and one end of which is defined by the axis of rotation and the other end of which is defined by the surface section. The radius of curvature particularly preferably corresponds to the length of this imaginary line.

In one embodiment, the fastening surfaces and the surface section have a spherical curvature. They thus have the shape of a spherical section. The spherical section-shaped configuration of the fastening surfaces and surface section has particular advantages. On the one hand, this can ensure, as explained for the arcuate curvature, that the fastening head presses against the surface section with a large surface in the operating position in any relative angular position within the angular range. On the other hand, the mounting of the lamp on a component can be further simplified. Because of the spherical curvature of the fastening surface and the surface section, the fastening head can be aligned in any way relative to the surface section without the area with which the fastening head presses against the surface section in a certain relative angular position being substantially reduced. In each relative angular position of the two fastening parts relative to one another, the fastening head is particularly preferably within the angular range with more than 70% of it Fastening surface on the surface section, in particular with over 90% of its fastening surface. The radius of curvature of the spherical curvature particularly preferably deviates by less than 20%, in particular by less than 10%, from the length of an imaginary connecting line which can be defined in any relative angular position within the angular range and which is perpendicular to the axis of rotation and perpendicular to the surface section strikes and one end of which is defined by the axis of rotation and the other end of which is defined by the surface section. The radius of curvature particularly preferably corresponds to the length of this imaginary line.

In one embodiment, a first guide section is provided on the fastening head, which corresponds to a second guide section which is provided in the bushing or on the surface section for fixing a rotational position of the fastening head relative to the fastening part having the bushing, with a rotational position about a rotational axis is turned off, which is perpendicular to the axis of rotation. The provision of such guide sections can further simplify the assembly of the lamp and thereby ensure that the fastening head always presses against the surface section with a sufficiently large area in the operating position. For example, the second guide section can be provided in the feedthrough in such a way that it is provided by the feedthrough itself, the first guide section being a pin which is to be arranged in the feedthrough in order to reach the operating position. For example, the second guide section can be ensured by elevations of the surface section, between which the first guide section is to be arranged in order to reach the operating position.

In one embodiment, the first and second contact surfaces each have an upper side facing the other of the two contact surfaces, the envelope of which is an arc of a circle curved around the axis of rotation. As a result, the implementation of different angular positions can be particularly simplified, in each of which first and second contact surfaces with large surface sections abut one another. For example, the first and / or second contact surface can have grids on their upper side facing the other of the two contact surfaces, which can be useful for setting discrete angular positions, the envelope of the grids having the shape of an arc of a circle. The upper sides of the contact surfaces, with which the contact surfaces point to one another and bear against one another in the operating position, are particularly preferably each designed as a circular arc section. It goes without saying that the cross-section of the contact surfaces is perpendicular to the axis of rotation.

In one embodiment, the fastening head has a head part connected in one piece with a bolt and a washer separate therefrom, the washer having the curved fastening surface on one side and the head part resting on the opposite side of the washer. This embodiment can have the particular advantage that commercially available components, for example screws, can be used to implement the fastening means, whereas only the washer has to be specifically designed to implement the lamp according to the invention. In general, the fastening means is particularly preferably designed such that it has a bolt which is connected in one piece to a head part, the head part forming at least part of the fastening head, and the bolt being inserted through the bushing in the operating position.

In the case of the provision of a washer explained above, this washer particularly preferably has a receptacle for receiving the head part, the receptacle in particular being designed as a cylindrical recess in the side opposite the curved sides. This receptacle can, for example, provide a guide for the head part and, for example, contribute to the assembly of the lamp on a component that is as little visible as possible and also simple. The fastening means is particularly preferably designed as a screw, a thread being provided as a fastening anchor in the other fastening parts, into which the fastening means is screwed in the operating position in order to achieve the pressing of its fastening head against the surface section.

In one embodiment, two feedthroughs offset with respect to one another along the axis of rotation are provided within the contact surface of the one fastening part. Accordingly, two fastening anchors offset from one another along the axis of rotation are preferably provided in the other of the two fastening parts. The provision of two bushings and two fastening anchors ensures particularly reliable fixing of the two fastening parts to one another. The luminaire particularly preferably has two fastening means, two feedthroughs, two fastening anchors and two surface sections, one fastening means each being assigned to a bushing, one fastening anchor and one surface section, and each combination of assigned fastening means, assigned bushing, assigned fastening anchor and assigned surface section in particular in this way can be configured, as in the present case using various exemplary embodiments with reference to a bushing, a fastening anchor Fasteners and a surface section explained. The two bushings are particularly preferably spaced apart from one another along the axis of rotation by at least five times their width along the axis of rotation. The assembly section of the first fastening part is particularly preferably arranged at least in sections, in particular over at least 50%, in particular at least 805, of its extent along the axis of rotation between the two bushings.

In one embodiment, the fastening device is suitable for setting at least two relative angular positions of the first and second fastening part about the axis of rotation relative to one another, the two fastening parts being pivoted relative to one another by at least 10 °, in particular at least 20 °, about the axis of curvature, starting from the first angular position, wherein in both angular positions the fastening head presses with more than 70%, in particular more than 80%, of its fastening surface against the surface section surrounding the bushing. The fastening device and the fastening means are particularly preferably designed such that the angular range within which different angular positions can be set in the fastening part, in which they can be fixed to one another in the operating position, is at least 10 °, in particular at least 20 °, about the axis of rotation. The provision of a correspondingly large angular range or of two possible adjustable angular positions, in which the fastening parts can be fixed to one another in a positionally fixed manner, ensures a particularly great variability of the lamp according to the invention, since the lamp according to the invention can thereby be mounted on different components and simply via one large angular range can be aligned relative to the component.

Particularly preferably, the contact surfaces of both fastening parts bend within a section along a direction perpendicular to the axis of rotation by at least 20 °, this section having an extension in this direction running perpendicular to the axis of rotation, which is less than 10 cm, in particular less than 7 cm. This section of the contact surfaces is thus short, and therefore only extends over a short length perpendicular to the axis of rotation, whereas at the same time the contact surfaces with this section ensure that they can be rotated considerably with respect to one another. For this purpose, the contact surfaces must of course have correspondingly small radii of curvature, in particular about a curvature axis running parallel to the axis of rotation. The inventors have recognized that, based on the idea on which the invention is based, such a configuration can be implemented and it can be ensured that the fastening head with a sufficiently large surface in the operating position presses against the surface section, in different angular positions within the angular range.

In one embodiment, corresponding discretization devices are provided on the abutting abutment surfaces, which are distributed over an angular range of at least 10 °, in particular at least 20 °, around the axis of rotation on the two abutment surfaces to ensure that the two fastening parts can be fixed relative to one another via their corresponding discretization devices in different ways Angular positions to each other. Such discretization devices can be designed, for example, using the grids explained above. The discretization devices can for example be designed such that one of the fastening parts has at least one elevation on its contact surface and the other of the fastening parts on its contact surface has at least one Has depression, wherein elevation and depression are designed to correspond to each other so that they can be brought into engagement. Of course, provision is preferably made to provide at least a plurality of elevations or a plurality of depressions or a plurality of depressions and a plurality of elevations so that the fixability in different angular positions is ensured. In one embodiment, the discretization devices are designed such that in a specific operating position, in which the fastening parts are in a specific angular position relative to one another, the discretization devices form a positive connection. In another embodiment, the discretization devices are designed in such a way that they are only useful for finding discrete angular positions, whereas the fixing of the fastening parts to one another in the operating position is achieved to a large extent, in particular practically completely, by a force fit between the two fastening parts, which is generated by the contact pressure existing between their contact surfaces.

In one embodiment, the fastening head is designed in the manner of a drop. The fastening head thus has a thickened section that tapers off. It has been found that such a fastening head is both suitable for realizing a high contact pressure on the surface section and also has such a streamlined shape that an excessive load on the lamp and thus on the fastening device is prevented as far as possible when the wind comes up.

In general, the fastening anchor is particularly preferably designed as a blind hole in which the fastening means can be fixed, the closed end of the blind hole being closed an interior of the lamp housing points. This can prevent dirt from entering the interior as far as possible. The luminaire housing is particularly preferably sealed in a watertight manner, in particular according to the IP65 standard, the provision of a blind hole-shaped fastening anchor being particularly advantageous for this purpose. In general, the fastening means preferably has a fastening head and a bolt which extends from the fastening head in a longitudinal direction and extends with its longitudinal extension through the bushing and to the fastening anchor, the longitudinal direction preferably perpendicular to the first contact surface, the second contact surface, strikes the surface portion and / or the mounting surface.

The invention is explained in more detail below with reference to four figures using an exemplary embodiment.

Figur 1:

in einer schematischen Prinzipdarstellung eine Ansicht einer Ausführungsform einer erfindungsgemäßen Leuchte;

Figur 2:

in schematischen Prinzipdarstellungen die Befestigungsteile der Ausführungsform gemäß Figur 1;

Figur 3:

in einer schematischen Prinzipdarstellung die Befestigungsteile der Ausführungsform gemäß Figur 1;

Figur 4:

in schematischen Prinzipdarstellungen Ansichten eines Elements des Befestigungsmittels der Ausführungsform gemäß Figur 1.

Show it:

Figure 1:

in a schematic diagram, a view of an embodiment of a lamp according to the invention;

Figure 2:

in schematic principle representations of the fasteners of the embodiment Figure 1 ;

Figure 3:

in a schematic representation of the principle of the fasteners of the embodiment Figure 1 ;

Figure 4:

in schematic diagrams, views of an element of the fastener according to the embodiment Figure 1 .

The illustrated embodiment of the invention Luminaire 1 has a luminaire housing 2 and a first fastening part 3 and a second fastening part 4. In Figure 1 the lamp 1 is shown in its operating position. In Figure 2 comprehensively the Figures 2a and 2 B the first fastening part 3 and the second fastening part 4 are shown. In Figure 3 the interaction of the first and second fastening parts 3, 4 is shown in the operating position. In Figure 4 comprehensively the Figures 4a and 4b the washer 51 is shown, which is part of the fastening means 5 of the present exemplary embodiment. Below are the Figures 1 to 4 explained together.

In the present exemplary embodiment, the second fastening part 4 is integrated in one piece in the lamp housing 2. The first fastening part 3 is an element separate from the lamp housing 2. The fastening means 5 are also separate elements. The first fastening part 3 has a mounting section 31 and a first fastening section 32. The first mounting section 31 is designed in the manner of a hollow cylinder and is suitable for attaching the lamp 1 to a lamp mast, in that the mounting section 31 is placed on the mast spigot of the lamp mast. The first fastening section 32 has a first contact surface 35 which is curved around an imaginary axis of rotation, not shown in the figures. The second fastening part 4 has a second contact surface 45 which is curved corresponding to the first contact surface 35. Both contact surfaces 35, 45 are each formed as a circular arc section, the center of which coincides with the axis of rotation. The design of the first and second contact surfaces 35, 45 enables the two fastening parts 3, 4 to be rotated relative to one another about the axis of rotation in such a way that the contact surfaces 35, 45 are in different angular positions which are located between the two fastening parts 3, 4 with reference to an angle can be set around the axis of rotation, in each case lie against one another over a large area. Especially from the Figures 2 and 3rd It can be seen that a first discretization device 33 is provided on the first contact surface 35, which is designed to correspond to a second discretization device 43 that is provided on the second contact surface 45. The provision of these discretization devices 33, 43 makes it easier for a fitter to align the luminaire 1 in a discrete, desired angular position relative to a component. In the exemplary embodiment shown, this is made possible in that when the fastening means 52, which are designed as screws, are screwed loosely into fastening anchors 44, the two fastening parts 3, 4 can still be rotated relative to one another, while the discretization devices 33, 43 are perceptible to the fitter when the fastening parts are rotated 3, 4 prescribe certain angular positions to each other.

In the exemplary embodiment shown, the first fastening part 3 has two bushings 34 in its first fastening section 32, each of which extends elongated in a direction perpendicular to the axis of rotation, the bushings 34 being designed as an elongated hole in the present case. The bushings 34 are spaced apart from one another in the direction of the axis of rotation, within the extent of which the mounting section 31 of the first fastening part 3 is arranged in the present case along the axis of rotation. The second fastening part 4, on the other hand, has two fastening anchors 44 in its second fastening section 45, which in the present case are designed as blind holes, a thread being provided in each of the blind holes. Each of the fastening anchors 44 is assigned to exactly one of the bushings 34. In the operating position, which in Figure 1 is shown, each of the bushings 34 is one of the Bushings 34 assigned fastener 5 inserted. The fastening means 5 are each identical in the present case and designed as a screw with a bolt 53 and a head part 52 and furthermore comprise a washer 51. Washer 51 and head part 52 together form the fastening head of the fastening means 5. The washer 51 forms the fastening surface of the fastening means 5, this fastening surface, as in particular Figure 4 comprehensively the Figures 4a and 4b can be seen, is spherically curved and is thus designed in the manner of a spherical section. The first fastening section 32 forms surface sections 320, with each of the surface sections 320 surrounding exactly one of the bushings 34. Here, the surface sections 320 each extend both in the direction of the axis of rotation and in a direction perpendicular to the axis of rotation beyond the leadthrough 34. The surface section 320 has a spherical curvature which is designed to correspond to the spherical curvature of the fastening surface formed by the washer 51. In the present case, the sides of the surface section 320 and the associated fastening surface facing each other are curved corresponding to one another, in the present case spherically curved with the same radius of curvature. In the present case, this radius of curvature corresponds to the length of an imaginary line which runs perpendicular to the axis of rotation and strikes the surface section 320 perpendicularly and whose length is defined by the axis of rotation and surface section 320. The person skilled in the art can see that this enables a very simple and very reliable mounting of the lamp 1 on a component in different angular positions of the two fastening parts 3, 4 relative to one another. Because, due to the special configuration of the embodiment according to the invention described here, the washer 51 lies above all in all Angular range adjustable relative angular position of the first and second fastening part 3, 4 to each other with the same surface on top of the surface section 320 and can thus, thanks to the sufficiently large area, easily allow sufficient contact pressure on the first fastening section 32 in the direction of the second fastening section 42. On the other hand, because of the spherical configuration of surface section 320 and washer 51, it is possible to arrange washer 51 in different rotational positions relative to surface section 320, without thereby changing the surface with which washer 51 presses against surface section 320. A fitter can thus use the fastening means 5 to fasten the two fastening parts 3, 4 to one another in a particularly simple manner, without having to pay attention to a special orientation of the fastening means 5.

Reference symbol list

1

lamp

2nd

Luminaire housing

3rd

first fastening part

4th

second fastening part

5

Fasteners

31

Assembly section

32

first fastening section

33

first discretization device

34

execution

35

first contact surface

42

second fastening section

43

second discretization device

44

Fastening anchor

45

second contact surface

51

Washer

52

Headboard

53

bolt

320

Surface section

Claims (15)

Luminaire (1) with fastening device for mounting on a component, the luminaire (1) comprising a luminaire housing (2) with a light exit side, in which a lamp is arranged, the fastening device comprising a first fastening part (3) and a second fastening part (4 ), the first fastening part (3) having a mounting section (31) for mounting on the component and the second fastening part (4) being arranged on the lamp housing (2), the first fastening part (3) having a first fastening section (32) which has a first contact surface (35), and wherein the second fastening part (4) has a second fastening section (42) which has a second contact surface (45) which corresponds to the first contact surface (35), the first and the second Fastening part (3, 4) about an axis of rotation relative to one another over an angular range in different relative angular positions are rotatable and in the different relative angular positions the first and the second contact surfaces (35, 45) abut one another and the two fastening parts (3, 4) can be fixed to one another in a positionally fixed manner, one of the two fastening parts (3, 4) has at least one bushing (34) within its contact surface (35, 45) and in one operating position a fastening means (5) is inserted through the bushing (34), which is provided on one of the other of the two fastening parts (3, 4) Fastening anchor (44) is fixed and which presses with a fastening head against a surface section (320) surrounding the leadthrough (34), the leadthrough (34) and / or the fastening anchor (44) extending in a direction perpendicular to the axis of rotation,
characterized in that
the surface section (320) is curved and the fastening head on its side facing the surface section (320), with which it presses against the surface section (320) in the operating position, has a curved fastening surface which is curved in the same direction as the surface section ( 320). Luminaire (1) according to claim 1,
characterized in that
the fastening surface and the surface section (320) have an arcuate curvature about a curvature axis running parallel to the axis of rotation, the fastening head, in particular in each relative angular position within the angular range, being in contact with the surface section (320) with over 70% of its fastening surface. Luminaire (1) according to one of the preceding claims,
characterized in that
the mounting surface and the surface section (320) have a spherical curvature, in particular in any relative angular position within the angular range the fastening head is in contact with the surface section (320) with over 70% of its fastening surface. Luminaire (1) according to one of the preceding claims,
characterized in that
a first guide section is provided on the fastening head, which corresponds to a second guide section provided in the feedthrough (34) or on the surface section (320) for determining a rotational position of the fastening head with respect to a rotation axis running perpendicular to the axis of rotation relative to the the implementation (34) having fastening part (3, 4). Luminaire (1) according to one of the preceding claims,
characterized in that
the first and the second contact surfaces (35, 45) each have an upper side facing the other of the two contact surfaces (35, 45), the envelope of which is an arc of a circle curved around the axis of rotation, these upper sides of the contact surfaces (35, 45) in particular each as Arc section are formed. Luminaire (1) according to one of the preceding claims,
characterized in that
the fastening head has a head part (52) integrally connected with a bolt (53) and a washer (51) separate therefrom, the washer (51) having the curved fastening surface on one side and the head part (52) on the opposite side of the washer (51) is present. Luminaire (1) according to claim 6,
characterized in that
the washer (51) has a receptacle for receiving the head part (52), the receptacle preferably being designed as a cylindrical recess in the side opposite the curved side. Luminaire (1) according to one of the preceding claims,
characterized in that
the fastening means (5) is designed as a screw (52), a thread being provided in the other of the fastening parts (3, 4) as fastening anchor (44), into which the fastening means (5) is screwed in the operating position in order to achieve the pressing its mounting head against the surface portion (320). Luminaire (1) according to one of the preceding claims,
characterized in that
two feedthroughs (34) offset from one another along the axis of rotation are provided within the contact surface (35, 45) of one fastening part (3, 4). Luminaire (1) according to one of the preceding claims,
characterized in that
the bushing (34) is designed as an elongated hole which extends obliquely perpendicular to the axis of rotation. Luminaire (1) according to one of the preceding claims,
characterized in that
the fastening device is suitable for setting at least two relative angular positions of the first and second fastening parts (3, 4) about the axis of rotation relative to one another, the two fastening parts (3, 4) starting from
the first angular position are pivoted relative to one another by at least 10 ° about the axis of curvature, the fastening head pressing in both angular positions with more than 70%, in particular more than 80%, of its fastening surface against the surface section (320) surrounding the leadthrough (34). Luminaire (1) according to one of the preceding claims,
characterized in that
the contact surfaces of both fastening parts (3, 4) curve within a section along a direction perpendicular to the axis of rotation by at least 20 °, the section having an extension in this direction that is less than 10 cm, in particular less than 7 cm. Luminaire (1) according to one of the preceding claims,
characterized in that
Corresponding discretization devices (33, 34) are provided on the abutting abutment surfaces (35, 45), which are arranged distributed over an angular range of at least 10 °, in particular at least 20 ° around the axis of rotation on the two abutment surfaces (35, 45) a fixability of the two fastening parts (3, 4) to one another via their corresponding discretization devices (33, 34) in different angular positions to one another. Luminaire (1) according to one of the preceding claims,
characterized in that
the mounting head is designed like a drop. Luminaire (1) according to one of the preceding claims,
characterized in that the fastening anchor (44) is designed as a blind hole in which the fastening means (5) can be fixed, the closed end of the blind hole pointing to an interior of the lamp housing (2) which is in particular sealed watertight.

Images