Luminaire with lockable fastening tap and method for mounting a luminaire

Abstract

The invention relates to a luminaire 1 for mounting on a busbar, the luminaire 1 comprising a luminaire housing 2 with a housing top and a busbar adapter 4.The luminaire 1 comprises a locking element 5 which has a contour, and a counter-contour corresponding to the contour is provided on the upper side of the housing, wherein the locking element 5 can be fixed in a first and a second mounting position relative to the luminaire housing 2, wherein in each mounting position the contour is arranged in a respective different relative position in engagement with the counter-contour, wherein the busbar adapter 4 can be fixed in a first fixing position on the upper side of the housing, in which the locking element 5 is arranged in the first mounting position, and can be fixed in a second fixing position on the upper side of the housing, rotated about a rotation axis relative to the first fixing position, in which second fixing position the locking element 5 is arranged in the second mounting position, wherein a change between the first and second fixing position can only be realized by loosening and displacing the locking element 5 relative to the luminaire housing 2.

Description

[0001] The invention relates to a luminaire which is designed for mounting on a busbar by means of a busbar adapter included in the luminaire, and to a method for mounting a luminaire on a busbar.

[0002] Generic luminaires designed for mounting on a track using a track adapter are well known in the art and are used for a wide variety of applications, not least for lighting supermarkets. In preparation for installing a luminaire, track systems are usually first laid on the ceiling. Depending on the ceiling height and desired design, these can be suspended directly from the ceiling or from the ceiling. The track systems serve the purpose of providing electrical power to luminaires and also of ensuring that a luminaire can be easily fixed to the ceiling. Accordingly, such track systems are sufficiently robust and have electrical cables that are usually laid in an interior space of the track system that is open on at least one side to allow access to the electrical cables from the outside.The busbar has a contour that corresponds to the contour of the busbar adapter, so that a busbar adapter can be attached to the busbar or inserted into it, thereby providing both mechanical locking and thus positionally fixed fixation of the busbar adapter to the busbar, as well as contacting the electrical lines of the busbar by means of contacts provided on the busbar adapter. In principle, a wide variety of busbar and busbar adapter shapes are conceivable, providing a corresponding contour of the busbar and busbar adapter, so that both mechanical fixation and electrical contacting, as explained, can be achieved by mounting the busbar adapter on the busbar.For example, the busbar can have a T-shaped, U-shaped or H-shaped cross-section, whereby the busbar adapter can have a corresponding cross-section which, when mounted, engages behind the cross-section of the busbar to ensure mechanical fixation and which is connected to the electrical lines of the busbar by means of spring contacts or clamp contacts or plug contacts.A frequently occurring design of busbar and busbar adapter provides that the busbar has a cross-section in the manner of a U, with electrical cables being laid on the inner sides of the U-legs of the U-shape and the legs forming an undercut at the open end of the U-shape, with the busbar adapter engaging behind the undercut for mechanical fixing and spring or clamp contacts being able to be actuated after the busbar adapter has been mechanically fixed to contact the electrical cables of the busbar.

[0003] In the usual, well-known luminaires of this type, the track adapter is fixed to a luminaire housing and electrically connected to the luminaire's electrical components. To install a luminaire, simply connect the luminaire with its track adapter mounted on the luminaire housing to the pre-assembled track. This ensures that the luminaire is fixed to the track and that the electrical cables of the track are contacted. When the luminaire is mounted, the top of the luminaire housing faces upward toward the track; it is often held vertically spaced from the track by the track adapter.Typically, the luminaire is significantly wider than the track, in particular at least twice as wide, especially at least three times as wide as the track, and typically the luminaire has a length that is at least equal to its width, often greater than its width, in particular at least 1.5 times, especially at least twice, its width. Thus, the luminaire has a significant horizontal extension defined by its length and width and can thus provide large-area illumination.However, there is a need, particularly in the lighting of supermarkets, for the alignment of the luminaire relative to the track to be specifically adjusted so that the arrangement of the elements to be illuminated in the supermarket can be taken into account, for example for the targeted use of an asymmetrical luminaire whose length is greater than its width and / or whose light beam distribution is asymmetrical. For example, it is known to provide a pivot bearing by means of which the track adapter is fixed to the luminaire housing. The pivot bearing enables rotation of the luminaire housing relative to the track adapter about a rotation axis, which in a conventional installation is parallel to the vertical, i.e.to the weight acting on the earth, whereas the pivot bearing simultaneously prevents any translational movement of the track adapter relative to the luminaire housing, so that the track adapter can only be moved relative to the track housing by rotating around the axis of rotation, but not linearly. This enables the luminaire to be aligned in a desired position with a pre-assembled track. However, at least a certain fixation of the rotational position of the luminaire relative to the track adapter is necessary so that the luminaire maintains its desired rotational position. Various approaches are known in the prior art with which such a fixing of the rotational position can be achieved while still achieving an attractive design for the luminaire.One known solution, for example, is to provide a locking lug on the luminaire housing or busbar adapter and to provide recesses offset by a rotation angle on the other of the two, so that the rotational position is fixed by means of a locking mechanism. It is also known to provide a spring pin on the luminaire housing that can engage in a recess on the pivot bearing provided for fixing the rotational position. Although the known measures do ensure a certain fixation of the rotational position of the luminaire housing relative to the busbar adapter, the fixation has proven insufficient for many applications or difficult to operate to set or release a specific rotational position.

[0004] DE 20 2018 102 643 U1 discloses a luminaire with a luminaire housing and a track adapter. The luminaire housing is rotatably mounted relative to the adapter, and the setting and release of a specific rotational position is enabled by clamping a clamping element against a cam that forms a rotational position. DE 10 2013 205 932 A1 and DE 20 2010 009 487 U1 disclose holding devices that enable the fixation of a luminaire housing to a track in various rotational positions.

[0005] The present invention is based on the object of providing a luminaire for mounting on a busbar or a method for mounting a luminaire on a busbar, with which at least one disadvantage of generic luminaires or methods is at least partially eliminated.

[0006] As a solution to the aforementioned problem underlying the present invention, the invention proposes a luminaire with the features of claim 1. The luminaire comprises a luminaire housing with a housing top and a busbar adapter. The busbar adapter can be fixed to the luminaire housing in at least two, in particular more than two, different, mutually rotated fixing positions, wherein it is arranged on the housing top in each of the rotated fixing positions. The busbar adapter is designed for mounting on a busbar with mechanical fixation to the busbar and with contacting of electrical lines of the busbar. Thus, the luminaire with the busbar adapter can be mounted from below on a busbar that is attached to the ceiling of a room.so that, when the luminaire is mounted, the luminaire housing is arranged below the conductor rail. The conductor rail adapter is arranged between the conductor rail and the luminaire housing. The luminaire housing is preferably fixed to the conductor rail exclusively via the conductor rail adapter. The luminaire further comprises a locking element having a contour. A counter-contour corresponding to the contour of the locking element is provided on the luminaire housing, in particular on the top side of the housing. The locking element can be fixed in a first and a second mounting position relative to the luminaire housing. In each mounting position, the contour is in engagement with the counter-contour. In the first mounting position, the contour is arranged in a different position relative to the counter-contour than in the second mounting position. The conductor rail adapter can be fixed in a first fixing position,in which the locking element is arranged in the first mounting position. Furthermore, the busbar adapter can be fixed in a second fixing position, which is rotated about a rotational axis relative to the first fixing position and in which the locking element is arranged in the second mounting position. In each fixing position in which the busbar adapter is fixed relative to the luminaire housing and relative to the locking element, it is arranged on the top side of the housing. Compared to the first fixing position, the busbar adapter is arranged rotated about a rotational axis relative to the luminaire housing by an angle of rotation. The locking element contributes to the fixing of the busbar adapter relative to the luminaire housing in such a way that a change between the first and second fixing positions of the busbar adapter, which it holds relative to the luminaire housing,can only be achieved by loosening and displacing the locking element relative to the luminaire housing. In other words, the locking element is thus designed to prevent a change in the relative position of the busbar adapter from the first fixing position to the second fixing position in the first mounting position and to prevent a change in the relative position of the busbar adapter relative to the luminaire housing from the second fixing position to the first fixing position in the second mounting position, wherein the locking element and the luminaire housing are designed to correspond to one another in such a way that, starting from the first fixing position of the busbar adapter relative to the luminaire housing, the second fixing position of the busbar adapter relative to the luminaire housing can only be reachedby releasing the locking element from the luminaire housing starting from the first mounting position and then moving it relative to the luminaire housing into the second mounting position. Accordingly, starting from the second fixing position of the track adapter relative to the luminaire housing, the first fixing position can only be reached by releasing the locking element from the luminaire housing starting from the second mounting position and then moving it into the second mounting position. In the respective fixing position, the locking element holds the respective mounting position and contributes to determining the relative position of the track adapter relative to the luminaire housing. A specific fixing position of the track adapter thus defines its arrangement both relative to the locking element and relative to the luminaire housing. Preferably, the locking element is releasably fixed to the luminaire housing in any mounting position.preferably fixed with respect to all three spatial directions. In one embodiment, the busbar adapter is fixed in each of the fixing positions by the locking element exclusively with respect to its rotational position about the rotational axis, whereas the locking element does not serve to fix the position of the busbar adapter relative to the housing along the rotational axis and - seen in translation - perpendicular to the rotational axis. As a result, the locking element can be particularly easy to handle and thus the rotational position of the busbar adapter about the rotational axis relative to the luminaire housing can be particularly easy to fix by means of the locking element, whereas a translational fixing of the luminaire housing to the busbar adapter can be achieved by other means, i.e. by means other than the locking element. In one embodiment, the locking element fixes the busbar adapter in its position relative to the luminaire housing in one direction,which runs perpendicular to the axis of rotation, translationally fixed. Generally, the first and second fixing positions are preferably spaced apart by a rotation angle of 90°, so that the busbar adapter is rotated by 90° in the first fixing position compared to the second fixing position, wherein the rotation is based on a rotation about the axis of rotation. In one embodiment, the busbar adapter can assume only two fixing positions, in particular rotated by 90°. In other embodiments, more than two fixing positions can be provided, wherein in each fixing position, the locking element occupies a mounting position relative to the luminaire housing associated with the respective fixing positions for determining the relative position of the busbar adapter relative to the luminaire housing.

[0007] In one embodiment, the locking element is designed as a separate block, wherein the contour is provided on a housing-side outer side section of the block and wherein, in each fixing position, the locking element points towards the busbar adapter with an outer side section offset from the housing-side outer side section. The offset outer side section forms a stop for a corresponding section of the busbar adapter, wherein the formation of the stop prevents rotation of the busbar adapter relative to the luminaire housing about the rotation axis. According to the invention, the locking element is generally advantageously designed as a separate block. The locking element is generally advantageously manufactured independently of the luminaire housing and independently of the busbar adapter and is detachable from both, i.e. can be handled independently of both.Generally, the locking element is preferably movable relative to the luminaire housing and relative to the busbar adapter, starting from each fixing position of the busbar adapter in which it occupies a defined position relative to the luminaire housing and relative to the locking element, which in turn is arranged in the mounting position associated with the respective fixing position, while the busbar adapter and the luminaire housing remain in the same relative position. Thus, preferably, starting from each fixing position, the locking element can be released from its mounting position, while the busbar adapter remains in the position relative to the luminaire housing that it occupies in the respective fixing position. Preferably, the locking element is movable relative to the luminaire housing, ieStarting from the mounting position, which it occupies in the respective fixing position, the locking element can be detached from the luminaire housing and moved relative to it in all three spatial directions, while the busbar adapter remains fixed in its position along the rotation axis relative to the luminaire housing. For example, starting from the fixing position along the rotation axis, the locking element can be displaced relative to the busbar adapter and the luminaire housing over a displacement range defined by a guide of the busbar adapter along the rotation axis, and can be rotated together with the busbar adapter along the rotation axis, so that it can be moved relative to the luminaire housing in all three spatial directions, while the busbar adapter remains fixed in its position relative to the luminaire housing along the rotation axis.In one embodiment, the locking element is detachable from the luminaire housing and the busbar adapter from any fixing position in such a way that it is movable completely independently of these in all three spatial directions, while the busbar adapter remains in the position it occupies in the respective fixing position relative to the luminaire housing. The locking element is generally preferably arranged horizontally next to the busbar adapter in any mounting position and is detachable from the luminaire housing and removable from the top of the housing to change between the mounting positions. Such that, starting from one of the mounting positions, it must first be moved vertically upwards, then moved horizontally to the luminaire housing and then placed vertically downwards onto the luminaire housing to achieve another of the mounting positions.Generally, the locking element can preferably be arranged at a vertical distance from the top side of the housing during the change between two mounting positions and must be moved vertically relative to the luminaire housing to implement the change. Generally, the luminaire housing preferably delimits a luminaire housing interior in all three spatial directions. Generally, the luminaire housing preferably has a container-like element with an opening and a cover element, wherein in an operating state of the luminaire in which the busbar adapter is in one of the explained fixing positions and the locking element is in one of the explained mounting positions, the cover element closes the container-like element. Generally, the container-like element can preferably be closed by the cover element independently of the locking element.Generally, the busbar adapter can be captively fixed to the luminaire housing independently of the locking element, while the locking element can be freely moved relative to the luminaire housing when detached from the luminaire housing. In particular, the locking element serves only to fix a rotational position of the busbar adapter about the aforementioned rotational axis. Because the locking element is designed as a separate block, the locking element can be particularly easily attached to the luminaire housing and busbar adapter to fix the rotational position of the busbar adapter about the aforementioned rotational axis.By providing the contour on a housing-side outer side section of the block, and by the block having a further outer side section, which faces the busbar adapter and forms a stop for a corresponding section of the busbar adapter, the block can also be particularly easily arranged on the busbar adapter and the luminaire housing, since, with its aforementioned outer side sections, it fulfills the function required to fix the busbar adapter relative to the luminaire housing. It has proven particularly advantageous that the corresponding section of the busbar adapter is an outer side section of the busbar adapter, since this further simplifies the assembly of the locking element.Furthermore, it is particularly advantageous that the block is arranged with its housing-side outer side section on an outer side section of the housing top of the luminaire housing formed by the contour, which further simplifies assembly.

[0008] According to the invention, the counter contour has a first partial counter contour and a second partial counter contour, which are arranged offset from one another. The first partial counter contour and the second partial counter contour are thus at least partially formed by different sections of the luminaire housing, in particular the upper side of the luminaire housing. In the first mounting position, the contour engages only with the first partial counter contour, and in the second mounting position, the contour engages only with the second partial counter contour. This makes it possible to provide a counter contour that particularly easily provides a user with the options for selecting the first or second mounting position. In one embodiment, the first and second partial counter contours partially overlap.For example, the first and second partial counter-contours can each jointly comprise at least one projection and / or at least one recess and further extend beyond this at least one projection or this at least one recess over different sections of the luminaire housing or the housing top side. In one embodiment, the first and second partial counter-contours are arranged side by side without overlap, so that the first partial counter-contour extends over a completely different section of the luminaire housing or the housing top side than the second partial counter-contour.

[0009] In one embodiment, the contour and counter-contour are designed as plug-in contours that can be inserted into one another along the axis of rotation. This ensures a detachable connection between the locking element and the luminaire housing in a particularly simple manner, preventing rotation of the track adapter relative to the luminaire housing in any of the described fixing positions. Preferably, the luminaire has a fastening means provided in addition to the counter-contour and contour, which is designed to detachably fix the locking element relative to the luminaire housing along the axis of rotation. The fastening means can be designed, for example, as a locking nipple, elastic clamping element, or screw. By providing the fastening means, the locking element can be permanently fixed relative to the luminaire housing in a particularly reliable manner, such that it can only be removed from the luminaire housing by deliberately loosening the fastening means.The luminaire housing preferably has a receptacle for the fastening means for each of the mounting positions. The receptacle is preferably designed as a threaded receptacle into which the fastening means can be screwed. The receptacle can be provided in addition to the mating contour or can be encompassed by the mating contour. In one embodiment, the contour has a passage which, in each mounting position, is aligned with a receptacle assigned to it in each case, such that the fastening means can be pushed through the passage and inserted into the receptacle to fasten the locking element relative to the luminaire housing. Generally speaking, the fastening means can be arranged in the receptacle assigned to the respective mounting position in order to secure the relative position of the locking element and the luminaire housing to one another.In one embodiment, a receptacle is assigned to multiple mounting positions, so that the receptacle can be used to fix the locking element in multiple mounting positions. In one embodiment, multiple receptacles are provided, with each mounting position being assigned a different receptacle or group of receptacles than the other mounting positions. In any case, each mounting position is assigned to a receptacle that serves to receive the fastening means for securing the relative position of the locking element relative to the luminaire housing in the respective mounting position.

[0010] In one embodiment, the luminaire has a pivot bearing by means of which the busbar adapter is secured against translation in a pre-assembly position and can be fixed relative to the luminaire housing so that it can rotate about the axis of rotation. In the pre-assembly position, the busbar adapter is thus already at least partially fixed in its position relative to the luminaire housing by means of the pivot bearing, but is guided rotatably relative to the luminaire housing by means of the pivot bearing. The pivot bearing, busbar adapter and luminaire housing are preferably designed to correspond to one another in such a way that in the pre-assembly position the busbar adapter is secured against any translation in a plane perpendicular to the axis of rotation by means of the pivot bearing, so that when the busbar adapter is rotated starting from the pre-assembly position, a defined guidance of the busbar adapter relative to the luminaire housing is ensured.Furthermore, the busbar adapter is particularly preferably secured by means of the pivot bearing in the pre-assembly position with respect to translation along the rotation axis relative to the luminaire housing, so that the busbar adapter cannot perform any translational movement relative to the luminaire housing in any of the three spatial directions. This allows the busbar adapter to be particularly reliably mounted on the luminaire housing in the pre-assembly position, securely and with defined guidance.Starting from the pre-assembly position, the busbar adapter can preferably be brought into its respective relative position, which it holds in the respective fixing position, simply by rotating it around the rotational axis defined by the pivot bearing. Naturally, to achieve the respective fixing position, the locking element must also be arranged in the assigned mounting position so that the rotational position of the busbar adapter is fixed by the locking element. The pivot bearing can be suitably designed in a professional manner, for example, comprising a ball bearing or being designed as a pure plain bearing. For example, the pivot bearing can comprise a mounting pin designed as the shaft of the pivot bearing.The pivot bearing preferably has a mounting pin with a rotary plate, wherein the rotary plate is rotatably mounted in a guide provided in the luminaire housing or in the busbar adapter, such that the mounting pin is fixed in its position relative to the luminaire housing or the busbar adapter by means of the rotary plate in its position along the rotation axis that extends along the pin axis of the mounting pin. The mounting pin is preferably fixed to the other of the luminaire housing and the busbar adapter. Thus, the mounting pin can be fixed to both the luminaire housing and the busbar adapter, thereby ensuring translational securing of the pivot bearing relative to the busbar adapter and relative to the luminaire housing in all directions, whereby the busbar adapter is also fixed against translation by means of the pivot bearing relative to the luminaire housing.Preferably, the mounting pin is fixed to the other of the luminaire housing and the busbar adapter in a rotationally secured manner, such that it can only be rotated about the axis of rotation relative to that one of the luminaire housing and the busbar adapter which forms the guide in which the turntable is rotatably mounted. The turntable can generally be formed by an undercut formed on the mounting pin. Preferably, the mounting pin is designed in the manner of a shaft, the shaft axis of which defines the axis of rotation, wherein the turntable is provided in a flange-like manner on the outside of the shaft, wherein particularly preferably the turntable extends circumferentially around the shaft perpendicular to the shaft axis with an extent beyond the shaft which corresponds at least to half the diameter of the shaft, in particular at least to the diameter of the shaft.This ensures particularly reliable and easy-to-implement fixation of the pivot bearing by means of the pivot plate relative to one of the luminaire housing and the busbar adapter. In one embodiment, the mounting pin has multiple pivot plates, wherein one of the pivot plates is rotatably mounted in a guide formed by the busbar adapter and another of the pivot plates is rotatably mounted in a guide formed by the luminaire housing and / or wherein a housing section of the busbar adapter or luminaire housing is arranged between two pivot plates for simple and low-friction rotation-enabling determination of the position of the pivot bearing relative to the busbar adapter or luminaire housing.

[0011] In one embodiment, the locking element is spaced from the pivot bearing in a direction perpendicular to the rotation axis in each fixing position of the busbar adapter. This makes it particularly easy to guide the busbar adapter relative to the luminaire housing by means of the pivot bearing, and moreover, it makes it particularly easy to arrange the locking element on the luminaire housing and busbar adapter independently of the pivot bearing. In particular, this allows the pivot bearing to be designed to be sufficiently small to be easily integrated into the busbar adapter and luminaire housing, whereas the locking element can be designed to be sufficiently large to prevent rotation of the busbar adapter relative to the luminaire housing even when a significant torque is applied about the rotation axis in the respective fixing position.Generally preferably, the locking element has an extension length in a specific direction that is greater than the extension length of the pivot bearing in the specific direction. Generally preferably, the contour and counter-contour engage with each other in each fixing position over a length along the specific direction that is longer than the extension length of the pivot bearing in this direction. This can ensure a particularly robust fixing of the rotational position of the track adapter relative to the luminaire housing. At this point, it should be noted that a luminaire housing often has a considerable extension length in one direction, so that when a force is applied to one side of the luminaire housing perpendicular to the axis of rotation, a considerable torque can act with respect to the axis of rotation of the pivot bearing.The inventors have recognized that it is particularly advantageous to provide the locking element independently of the pivot bearing between the busbar adapter and the luminaire housing, since this ensures a particularly robust design of the luminaire regardless of the dimensioning of the pivot bearing. In one embodiment, the busbar adapter has an adapter housing, wherein the pivot bearing is fixed within the adapter housing relative to the adapter housing and wherein the locking element is arranged offset from the pivot bearing on an outer side of the adapter housing in each fixing position of the busbar adapter, and thus of course in each mounting position of the locking element to which the respective fixing position is assigned, and is arranged in the mating contour, i.e. is brought into engagement with the mating contour. The adapter housing is particularly preferably designed as a multi-part adapter housing.Particularly preferably, the adapter housing forms a guide for the pivot bearing, in which the pivot bearing is translationally fixed in all three spatial directions, wherein the guide is formed by at least two parts of the adapter housing. The multi-part design of the adapter housing allows elements to be introduced into the adapter housing in a particularly simple manner and subsequently fixed in their spatial position by joining the multiple parts of the adapter housing.

[0012] In one embodiment, the locking element has an extension length in a direction perpendicular to the axis of rotation of at least 10 mm, in particular at least 15 mm, in particular at least 20 mm, in each fixing position. The locking element thus extends over a corresponding extension length in each fixing position for which the axis of rotation is defined, and thus in each associated mounting position. The locking element can be formed in one piece and thus continuously, or it can consist of several sub-elements that lie directly against one another or are spaced apart from one another in the respective mounting positions. For example, the locking element can be formed in one piece or can comprise several sub-elements arranged one behind the other along the aforementioned direction running perpendicular to the axis of rotation.In any case, the locking element preferably has such a considerable extension length along the said direction perpendicular to the axis of rotation that it can particularly effectively counteract any rotation of the busbar adapter and luminaire housing relative to one another starting from the respective fixing position. In one embodiment, the locking element rests against the busbar adapter in each fixing position with a contact section which extends in the said direction perpendicular to the axis of rotation over at least 10 mm, in particular at least 15 mm, in particular at least 20 mm, and which particularly preferably further extends along the axis of rotation over at least 8 mm, in particular at least 10 mm and / or at most 25 mm, in particular at most 20 mm. The contact section can extend continuously or interruptedly in the respective direction of extension.In the case of an interrupted extension along a direction of extension, the respective length over which the locking element or contact section extends is defined by the distance between the absolute extension ends in the respective direction of extension. A sufficiently large dimensioning of the locking element can ensure particularly reliable securing of the rotational position of the track adapter relative to the luminaire housing.

[0013] In one embodiment, the luminaire housing forms a dome with a flat upper side on its housing top side. The busbar adapter rests against the flat upper side of the dome in every fixing position. Particularly preferably, moreover, the locking element rests against the flat upper side of the dome in every fixing position. Particularly preferably, the counter contour is provided on the flat upper side of the dome, for example by projections extending upwards from the flat upper side and / or recesses extending downwards. Particularly preferably, in every fixing position, the busbar adapter is spaced from an edge of the dome and the locking element is arranged between the busbar adapter and the edge. The edge circumferentially delimits the flat upper side of the dome. By arranging the locking element between the edge and the busbar adapter, it can be easily and securely fixed to the upper side of the dome.Particularly preferably, the locking element merges with its outer side flush with the edge of the dome. The locking element thus mirrors the edge with its outer side. This allows the locking element to be visually integrated into the luminaire in a particularly discreet manner. Generally, the dome preferably has a round cross-section, at least at the level of its flat upper side. This allows the locking element to be arranged uniformly in the various fixing positions in a particularly simple manner, i.e., with a comparable visual impression in each case. Generally, the flat upper side runs perpendicular to the axis of rotation.

[0014] In one embodiment, the contour and the counter-contour, in one embodiment together with a fastening means which releasably fixes the locking element relative to the luminaire housing along the axis of rotation in each fixing position, together comprise at least two projections which are spaced apart from one another in a direction perpendicular to the axis of rotation and respectively associated receptacles. The projections and receptacles extend with their projection length or receptacle depth preferably along the axis of rotation. For example, each of the contour and counter-contour can each have a projection and the other a respectively associated receptacle. In one embodiment, only one of the contour and counter-contour has projections, while the other has receptacles. In one embodiment, the counter-contour has at least two projections and the contour has at least two projections.In one embodiment, only one of the contour and the counter-contour has a projection, and the contour and counter-contour together have two receptacles. In the fixing position, the projection formed by the contour and the counter-contour is arranged in one of the two receptacles, and the fastening means is arranged in the other of the two receptacles. In each fixing position, one of at least two of the projections is arranged in the receptacle assigned to it. Thus, in the fixing position, at least two projections are each arranged in a receptacle assigned to them.For example, the contour can have two projections and the mating contour can have four receptacles, or the contour can have two receptacles and the mating contour can have four projections, wherein in the first fixing position the two projections are each arranged in one of two receptacles assigned to the first fixing position, and in the second fixing position the two projections are each arranged in one of two receptacles assigned to the second fixing position. By arranging the projections in the receptacles, the locking element is fixed in its position in a plane that runs perpendicular to the axis of rotation in each fixing position. It should be noted at this point that the locking element is of course in the respectively assigned mounting position in the fixing position of the busbar adapter.

[0015] The invention further relates to a method for mounting a luminaire on a busbar. In a first method step, a busbar adapter is fastened to a luminaire housing of the luminaire, wherein its position along a rotation axis relative to the luminaire housing is determined. During or after fastening, a rotational position of the busbar adapter relative to the luminaire housing is selected and adjusted. In a second method step following the first method step, a locking element is fastened to the luminaire housing, and the locking element prevents rotation of the busbar adapter relative to the luminaire housing. By fastening the locking element, the rotational position of the busbar adapter relative to the luminaire housing is thus secured.According to the invention, the busbar adapter is fixed, starting from a first fixing position in which the locking element is arranged in the first mounting position relative to the luminaire housing, in a second fixing position which is rotated about an axis of rotation relative to the first fixing position and in which the locking element is arranged in a second mounting position relative to the luminaire housing, in that, in order to change between the first and second fixing positions, a release and displacement of the locking element relative to the luminaire housing is realized, wherein a contour of the locking element in the first mounting position is in engagement only with a first partial counter-contour of the luminaire housing and in the second mounting position is in engagement only with a second partial counter-contour of the luminaire housing, which is offset from the first partial counter-contour.For example, the second method step can comprise firstly plugging the locking element with its contour onto a mating contour of the luminaire housing, whereby it is fixed translationally with respect to every direction perpendicular to the axis of rotation relative to the luminaire housing, whereby it fixes the rotational position. Preferably, the plugging is carried out with a movement along the axis of rotation. Preferably, after plugging, i.e. after the contour and mating contour have been brought into engagement, the locking element is releasably fixed to the luminaire housing by means of a fastening means and is thereby secured against displacement relative to the luminaire housing along the axis of rotation. For example, the fastening means can be designed as a screw which is inserted through a leadthrough of the locking element and screwed into a threaded receptacle of the luminaire housing.In embodiments, it can be provided that the releasable fixing of the locking element takes place during the plugging of the locking element onto the luminaire housing and thus the engagement of the contour with the mating contour, for example by designing the contour and mating contour as clamping contours or by screwing a fastening means designed as a screw into the luminaire housing during the plugging. Furthermore, the luminaire housing with the busbar adapter attached to it is guided to the busbar and the busbar adapter is inserted into the busbar, whereby both a mechanical fixing of the busbar adapter and, by means of the busbar adapter, a mechanical fixing of the luminaire housing relative to the busbar are achieved. Furthermore, contacts of the busbar adapter are contacted with electrical lines of the busbar for supplying electrical components of the luminaire.The electrical contact can, for example, be made simultaneously with the mechanical fixation or after the mechanical fixation. In one embodiment, the locking element is first attached to the luminaire housing, and then the luminaire housing, with the attached busbar adapter and the attached locking element, is guided to the busbar. In another embodiment, the luminaire housing, with the attached busbar adapter, is first guided to the busbar and mounted thereon as described, after which the rotational position of the busbar adapter is determined and the locking element is attached to the luminaire housing.The invention further relates to a system comprising a luminaire according to the invention and a busbar designed to correspond thereto, wherein the busbar adapter fixed to the luminaire in one of the fixing positions can be arranged on the busbar while being fixed to the busbar and while contacting electrical lines of the busbar for supplying electrical components of the luminaire.

[0016] The various embodiments of the invention explained here can each be combined with one another in a particularly advantageous manner. In particular, different solutions can be combined with one another; in particular, the method according to the invention can have features in embodiments that are apparent to the person skilled in the art from explanations of embodiments of a luminaire according to the invention, and vice versa. Furthermore, embodiments of the invention can have features that are described here with reference to generic luminaires or methods.

[0017] The invention is explained in more detail below with reference to six figures using exemplary embodiments.

[0018] They show: Fig. 1: in a schematic representation of the basic structure of an embodiment of a luminaire according to the invention; Fig. 2: in various schematic principle representations, views of an embodiment of a luminaire according to the invention, wherein the busbar adapter is in a different fixing position in the various principle representations; Fig. 3: in a schematic principle representation of a further embodiment of a luminaire according to the invention; Fig. 4: in various schematic diagrams, different views of the locking element of the embodiment according to Fig. 3; Fig. 5: in various schematic diagrams, detailed views of sections of the luminaire according to Fig. 3; Fig. 6: in various schematic diagrams, detailed views of sections of the luminaire according to Fig. 3.

[0019] In Fig. Figure 1 shows a schematic diagram of a section of an embodiment of a luminaire 1 according to the invention to explain fundamental aspects of the invention. The luminaire 1 comprises a schematically indicated luminaire housing 2, which forms a dome 23 with a flat upper surface on its upper side. When the luminaire 1 is mounted as intended, the flat upper surface lies perpendicular to the weight acting on the earth. A busbar adapter 4 is arranged on the upper side of the luminaire housing 2, in this case on the flat upper side of the dome 23 of the luminaire housing 2.The busbar adapter 4, like conventional busbar adapters which are widely used in the prior art, is designed to be inserted into a corresponding busbar with an upward movement and to be fixed to it in such a way that its holding devices 43 engage behind corresponding holding devices of the busbar and that its contacts 40 rest on electrical lines which are guided in the busbar.A typical design of the busbar provides for the busbar to be U-shaped, with two electrical lines running on the inside of each of the two U-legs, which electrical lines can be contacted by the two contacts 40 provided on each side of the busbar adapter 4, with the U-legs further forming a projection on their inside, which is engaged behind by the holding device 43 of the busbar adapter 4 for mechanically fixing the busbar adapter 4 to the busbar and thus for mechanically fixing the luminaire 1 to the busbar. On the top side of the housing of the luminaire housing 2, in this case on the flat top side of the dome 23, a counter-contour is provided which has a first partial counter-contour 24 and a second partial counter-contour 25. In the version shown in . Fig. In the pre-assembly position shown in Figure 1, the busbar adapter 4 is already translationally fixed to the luminaire housing 2, but is still mounted so as to be rotatable about a rotational axis relative to the luminaire housing 2. By placing the locking element 5 with its contour into one of the two partial counter-contours 24, 25, the busbar adapter 4 can be fixed with its rotational position relative to the luminaire housing 2. In the present exemplary embodiment and generally advantageous according to the invention, the busbar adapter 4, luminaire housing 2, and locking element 5 are configured to correspond to one another in such a way that the locking element 5 cannot be arranged in the second assembly position when the busbar adapter 4 is in the position relative to the luminaire housing 2 that it occupies in the first fixing position, and that the locking element 5 cannot be arranged in the first assembly position.when the busbar adapter 4 is in the relative position relative to the luminaire housing 2 that it occupies in the second fixing position, and / or that the busbar adapter 4 cannot be arranged in the relative position relative to the luminaire housing 2 that it occupies in the first fixing position when the locking element 5 is arranged in the second mounting position, and that the busbar adapter 4 cannot be arranged in the relative position relative to the luminaire housing 2 that it occupies in the second fixing position when the locking element 5 is arranged in the first mounting position. In the present exemplary embodiment and generally advantageous according to the invention, the busbar adapter 4 can be brought into a specific position relative to the luminaire housing 2, which it occupies in a specific fixing position, independently of the positioning of the locking element 4, and then the locking element 5 can be brought into its mounting position.which is assigned to the specific fixing position, for permanently fixing the busbar adapter to the specific fixing position.,

[0020] Each of the partial counter contours 24, 25 has a first receptacle 241, 251 and a second receptacle 242, 252. In a first assembly position, the locking element 5 is provided with the first projection 51 and the second projection 52 (in Fig. 4 shown in detail by way of example) is inserted into the receptacles 241, 242; in the second mounting position, it is inserted with its projections 51, 52 into the receptacles 251, 252. The partial counter-contours 24, 25 further each have a threaded receptacle 243, 253 into which a fastening means 50 designed as a screw can be screwed for releasably fixing the locking element 5 with respect to its position along the axis of rotation relative to the luminaire housing 2 in the respective mounting position.

[0021] In Fig. 2 comprising the Fig. 2a and Fig. 2b is the highly simplified embodiment according to Fig. 1 shown in two different states: In Fig. 2a, the busbar adapter 4 is in its first fixing position, in which the locking element 5 is in the first mounting position. Accordingly, Fig. 2a only the receptacles 251, 252 and the threaded receptacle 253 of the second partial counter-contour 25 can be seen, since the first partial counter-contour 24 is covered by the locking element 5 and the fastening means 50. In Fig. 2b, the busbar adapter 4 is in its second fixing position and thus the locking element 5 is in its second mounting position. Accordingly, in Fig. 2b only the recesses 241, 242 and the threaded recess 243 of the first partial counter-contour 24 can be seen, whereas the second partial counter-contour 25 is covered by the locking element 5 and the fastening means 50. From the overview of the Fig. 1 and Fig. 2 it can be seen that the locking element 5 can be mounted on the luminaire housing 2 in a very simple manner and, moreover, a particularly reliable and robust fixation of the rotational position of the busbar adapter 4 relative to the luminaire housing 2 can be achieved via the locking element 5.

[0022] In Fig. Figure 3 shows a simplified schematic diagram of a further embodiment of a luminaire 1 according to the invention. The luminaire 1 has a luminaire housing 2, on the two opposite sides of which an additional luminaire housing 3 is arranged. For example, supply components of the luminaire 1 can be arranged in the luminaire housing 2, whereas light sources as electrical components of the luminaire 1 are arranged in the additional luminaire housings 3, which are supplied by the supply components. In any case, the entire luminaire 1 can be fastened to a busbar and supplied with electricity by means of the busbar adapter 4 provided on the top side of the luminaire housing 2. The luminaire housing 2 has a container-like element 21 and a cover element 22, which forms a dome 23, which forms a portion of the top side of the luminaire 1. Fig. 3, the busbar adapter 4 is arranged in its first fixing position, and the locking element 5 is arranged in its first mounting position, so that only the receptacles 251, 252 and the threaded receptacle 253 of the second partial counter-contour 25 can be seen. At this point, it should be noted that the configurations of the counter-contours 24, 25 and the locking element 5 of the embodiment according to Fig. 3 of the design in the embodiment according to Fig. 1. In Fig. 4 is the locking element 5, as in the embodiments according to Fig. 1 and Fig. 3 is used, is shown schematically in two different views. From the views it can be seen that the locking element 5 has a first projection 51 and a second projection 52 as well as a passage 53. In each mounting position of the locking element 5 relative to the luminaire housing 2, each of the projections 51, 52 is arranged in a receptacle 241, 251, 242, 252 assigned to it and the passage 53 is arranged in alignment with the respective threaded receptacle 243, 253, such that the fastening means 50 can be inserted through the passage 53 into the threaded receptacle 243, 253.

[0023] In Fig. 5 comprising the Fig. 5a and Fig. 5b is the embodiment of the luminaire 1 according to Fig. 3 are shown schematically in various views with enlarged sections for the purpose of explanation. Accordingly, Fig. 6 comprising the Fig. 6a, Fig. 6b and Fig. 6c different views of sections of the lamp 1 of the embodiment according to Fig. 3. The Fig. 5 and Fig. 6 serve to explain the assembly of the track adapter 4 relative to the luminaire housing 2 and therefore show the advantageously relevant components of the luminaire 1. Fig. 6, in particular from the Fig. 6b and Fig. 6c, the contacts 40 and the holding devices 43 of the busbar adapter 4 are also clearly visible. When mounting the luminaire 1 on a busbar, in the described embodiment, the busbar adapter 4 is first inserted into the busbar from below, after which the actuating lever 44 is actuated, thereby extending the contacts 40 and the holding devices 43 on both sides of the busbar adapter, thereby mechanically fixing and electrically contacting the luminaire to the busbar or the electrical cables routed therein. Fig. 5a, the busbar adapter 4 is shown placed on the dome 23 of the cover element 22 of the luminaire housing 2 in its first fixing position. In this fixing position, the locking element 5, which is fixed in position on the luminaire housing 2, rests with a contact section on an outer side of the busbar adapter 4. As a result, the locking element 5 fixes the busbar adapter 4 in its rotational position relative to the luminaire housing 2. The busbar adapter 4 is furthermore fixed by a pivot bearing 6 relative to the luminaire housing 2 in a translational manner in every spatial direction, so that when the locking element 5 is omitted, it can only be rotated relative to the luminaire housing 2 about the rotation axis, but cannot be moved linearly relative to the luminaire housing 2. The pivot bearing 6 provided for this purpose, which is particularly known from the Fig. 6c, has a mounting pin with a first rotary plate 62 and a second rotary plate 63. The second rotary plate 63 is rotatably mounted in a guide of the adapter housing of the busbar adapter 4. For easy assembly, the adapter housing has a first housing part 41 and a second housing part 42, by joining which the guide for the second rotary plate 63 is closed and thus the rotary plate 63 is translationally fixed in all three spatial directions relative to the adapter housing. This is particularly evident from the synopsis of the Fig. 6a, Fig. 6b and Fig. 6c: While in Fig. 6b shows a view of the inside of the first housing part 41 without the pivot bearing 6 being visible, Fig. 6c also shows the pivot bearing 6, whereas in Fig. 6a shows the assembled adapter housing with the two housing parts 41, 42, on the underside of which the second rotary plate 63 of the rotary bearing 6 is arranged. The second rotary plate 63 has an anti-rotation projection 61, which is already arranged in the pre-assembly position, and of course also in every fixing position of the busbar adapter 4, between two securing projections 26 provided on the top side of the dome 23. As a result, the rotary bearing 6 is already fixed in its position relative to the luminaire housing 2 in the pre-assembly position, whereas the busbar adapter 4 is rotatable relative to the rotary bearing 6 and thus relative to the luminaire housing 2 in the pre-assembly position, in which the locking element 5 is not yet mounted, thanks to the rotatable mounting of the second rotary plate 63 in the guide of the adapter housing. Fig. 5b shows the underside of the cover element 22 of the luminaire housing 2 in the fixing position of the busbar adapter 4, which it has in Fig. 5a, and thus shown in the mounting position of the locking element 5, which it has in Fig. 5a. From Fig. 5b it can be seen that the mounting pin of the pivot bearing 6 is fixed relative to the luminaire housing 2 by a nut 7, so that the pivot bearing 6 and thus also the busbar adapter 4 are secured translationally relative to the luminaire housing 2 with respect to a movement along the axis of rotation. Furthermore, the recesses 251, 252 of the second partial counter contour 25 as well as a web 2530 can be seen, on the Fig. 5b, the threaded receptacle 253 is provided so that it is accessible. Furthermore, Fig.5b shows the projections 51, 52 of the locking element 5, which are arranged in the corresponding receptacles 241, 242 of the first partial counter-contour 24. Furthermore, the web 2430 can be seen, which forms the threaded receptacle 243 of the first partial counter-contour 24. List of reference symbols 1 light 2 luminaire housings 3 additional light housings 4 busbar adapters 5 locking element 6 pivot bearings 7 Mother 21 container-like element 22 Cover element 23 Cathedral 24 first partial counter contour 25 second partial counter contour 26 Safety projection 40 Contact 41 first housing part 42 second housing part 43 Holding device 44 operating lever 50 fasteners 51 first lead 52 second lead 53 Implementation 61 Anti-rotation projection 62 first turntable 63 second turntable 241 first recording 242 second recording 243 threaded mount 251 first recording 252 second recording 253 threaded mount 2430 jetty 2530 jetty

Claims

[1] A luminaire (1) for mounting on a busbar, the luminaire (1) comprising a luminaire housing (2) with a housing top side and a busbar adapter (4) which is arranged on the housing top side and can be fixed to the luminaire housing (2) in at least two different, mutually rotated fixing positions and which is designed for mounting on the busbar with mechanical fixing to the busbar and contacting of electrical lines of the busbar, wherein the luminaire (1) comprises a locking element (5) which has a contour, and a counter-contour corresponding to the contour is provided on the luminaire housing (2), wherein the locking element (5) can be fixed in a first and a second mounting position relative to the luminaire housing (2), wherein in each mounting position the contour is arranged in a respective different relative position in engagement with the counter-contour,wherein the busbar adapter (4) is fixable in a first fixing position, in which the locking element (5) is arranged in the first mounting position, and in a second fixing position rotated about a rotation axis relative to the first fixing position, in which the locking element (5) is arranged in the second mounting position, , characterized by that a change between the first and second fixing position can only be realized by releasing and displacing the locking element (5) relative to the lamp housing (2), wherein the counter-contour has a first partial counter-contour (24) and a second partial counter-contour (25) which are arranged offset from one another, wherein the contour is in engagement only with the first partial counter-contour (24) in the first mounting position and is in engagement only with the second partial counter-contour (25) in the second mounting position. [2] Luminaire (1) according to claim 1, characterized bythat the locking element (5) is designed as a separate block, wherein the contour is provided on a housing-side outer side section of the block and wherein in each fixing position the locking element (5) points to the busbar adapter (4) with an outer side section offset from the housing-side outer side section, which forms a stop for a corresponding section of the busbar adapter (4) while preventing rotation of the busbar adapter (4) relative to the luminaire housing (2) about the axis of rotation. [3] Luminaire (1) according to one of the preceding claims, characterized byin that the contour and counter-contour are designed as plug-in contours which can be plugged into one another along the axis of rotation, wherein in particular the luminaire (1) comprises a fastening means (50) which is provided in addition to the counter-contour and contour and which is designed for the releasable fixing of the locking element (5) relative to the luminaire housing (2) along the axis of rotation, wherein in particular the luminaire housing (2) has, for each of the mounting positions, a receptacle (241, 242, 251, 252), in particular a threaded receptacle (243, 253), for the fastening means (50), in which the fastening means (50) can be arranged in the respective mounting position in order to secure the relative position of the locking element (5) and the luminaire housing (2) to one another. [4] Luminaire (1) according to one of the preceding claims, characterized byin that the luminaire (1) comprises a pivot bearing (6) by means of which the busbar adapter (4) is secured against translation in a pre-assembly position and can be fixed so as to be rotatable about the axis of rotation relative to the luminaire housing (2), wherein each of the fixing positions can be realized starting from the pre-assembly position. [5] Luminaire (1) according to claim 4, characterized by in that the pivot bearing (6) comprises a mounting pin with a rotary plate (62, 63), wherein the rotary plate (62, 63) is rotatably mounted in a guide which is provided in one of the luminaire housing (2) and the busbar adapter (4), and the mounting pin is fixed, in particular fixed against rotation, to the other of the luminaire housing (2) and the busbar adapter (4). [6] Luminaire (1) according to one of claims 4 or 5, characterized by that the locking element (5) is spaced from the pivot bearing (6) perpendicular to the axis of rotation in each fixing position of the busbar adapter (4). [7] Luminaire (1) according to one of claims 4 to 6, characterized by in that the busbar adapter (4) has an adapter housing, in particular a multi-part one, wherein the rotary bearing (6) is fixed within the adapter housing relative to the adapter housing and wherein the locking element (5) is arranged offset from the rotary bearing (6) on an outer side of the adapter housing and in the counter contour in each fixing position. [8] Luminaire (1) according to one of the preceding claims, characterized byin that the locking element (5) has an extension length in a direction perpendicular to the axis of rotation of at least 10 mm, in particular at least 15 mm, in each fixing position, wherein in particular the locking element (5) bears against the busbar adapter (4) in each fixing position with a contact section which extends in the direction perpendicular to the axis of rotation over at least 10 mm, in particular at least 15, and which extends along the axis of rotation over at least 8 mm and in particular a maximum of 25 mm. [9] Luminaire (1) according to one of the preceding claims, characterized bythat the luminaire housing (2) forms a dome (23) with a flat upper side and in particular a round cross-section on its upper side, wherein the busbar adapter (4) and in particular the locking element (5) rest on the flat upper side of the dome (23) in each fixing position, wherein in particular in each fixing position the busbar adapter (4) is spaced from an edge of the dome (23) and the locking element (5) is arranged between the busbar adapter (4) and the edge, wherein in particular the locking element (5) merges with its outer side flush into the edge of the dome (23). [10] Luminaire (1) according to one of the preceding claims, characterized byin that the contour and the counter-contour, in particular each partial counter-contour (24, 25), and a fastening means (50) provided for the releasable fixing of the locking element (5) and the luminaire housing (2) along the axis of rotation together form at least two projections (51, 52) spaced apart from one another in a direction perpendicular to the axis of rotation and receptacles (241, 242, 251, 252) respectively associated therewith, wherein in each fixing position one of at least two of the projections (51, 52) is arranged in the receptacle (241, 242, 251, 252) associated with it and the locking element (5) is fixed in its position in a plane which runs perpendicular to the axis of rotation by the arrangement of the at least two projections (51, 52) in the receptacle (241, 242, 251, 252) respectively associated with them. [11] Luminaire (1) according to one of the preceding claims, characterized byin that the locking element (5) is movable relative to the luminaire housing (2) and to the luminaire housing (4) starting from any fixing position of the busbar adapter (4), while the busbar adapter (4) and the luminaire housing (2) remain in the same relative position to one another, wherein in particular the locking element (5) is detachable from the luminaire housing (2) starting from any fixing position of the busbar adapter (4) and movable relative to the latter in all three spatial directions, while the busbar adapter (4) remains fixed in its position relative to the luminaire housing (2) along the rotation axis. [12] Method for mounting a luminaire (1) on a busbar, wherein in a first method step, a busbar adapter (4) is fastened to a luminaire housing (2) of the luminaire (1) by determining its position along a rotational axis relative to the luminaire housing (2), and a rotational position of the busbar adapter (4) about the rotational axis relative to the luminaire housing (2) is selected and set as a first fixing position, wherein in a second method step, a locking element (5) is fastened to the luminaire housing (2) in a first mounting position, and rotation of the busbar adapter (4) relative to the luminaire housing (2) is prevented by the locking element (5), wherein the luminaire housing (2) with the busbar adapter (4) fastened to it is guided to the busbar and the busbar adapter (4) is inserted into the busbar,whereby both a mechanical fixation of the busbar adapter (4) and, by means of the busbar adapter (4), a mechanical fixation of the luminaire housing (2) relative to the busbar is achieved, and contacts (40) of the busbar adapter (4) are contacted with electrical lines of the busbar for supplying electrical components of the luminaire (1), , characterized byin that in a further method step, the busbar adapter (4), starting from the first fixing position in which the locking element (5) is arranged in the first mounting position relative to the luminaire housing (2), is fixed in a second fixing position which is rotated about an axis of rotation relative to the first fixing position and in which the locking element (5) is arranged in a second mounting position relative to the luminaire housing (2), in that in order to change between the first and second fixing position, a release and displacement of the locking element (5) relative to the luminaire housing (2) is realized, wherein a contour of the locking element (5) in the first mounting position is in engagement only with a first partial counter-contour (24) of the luminaire housing (2) and in the second mounting position is in engagement only with a second partial counter-contour (25) of the luminaire housing (2), which is offset from the first partial counter-contour (24).

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