Light strip with indirect component

Abstract

The invention relates to a system for producing an elongate light fixture (100), the system comprising a support rail (1, 10), a mounting element (6), at least one extension element (7), at least one extension mounting element (102, 600) and at least two extension side walls (9), wherein, in the operating state, the extension element (7) is arranged on an outer side of the support rail base (11) facing away from the interior and is fixed to the support rail (1, 10), and the extension mounting element (102, 600) and the extension side walls (9) are fixed to the support rail (1, 10) by means of the extension element (7), wherein the extension mounting element (102, 600) extends at a vertical distance from the support rail base (11) and the extension side walls (9) are each arranged on a transverse side of the extension mounting element (102, 600) and, together with the extension element and the outer side of the support rail (1, 10), enclose an extension interior provided for receiving electrical extension components.

Description

[0001] The invention relates to a system for realizing a luminaire that is elongated in a longitudinal direction, as well as a luminaire realized by means of such a system, and a method for realizing a luminaire component or an arrangement of luminaire components or a luminaire.

[0002] These systems are designed to create a luminaire of the same type, which is elongated in a longitudinal direction and usually comprises several longitudinally elongated mounting rails. Typically, the mounting rails serve to fix the luminaire to a building structure, such as a ceiling. The mounting rails form a kind of basic framework for the luminaire and are designed to accommodate supply lines and, preferably, mounting bodies to which light sources or other electrical functional elements are attached. Thus, the mounting rails provide the infrastructure for the luminaire. Electrical functional elements of the luminaire, such as light sources (especially circuit boards with LEDs), radio modules, electrical cables, and / or control gear, are usually attached to the mounting bodies.During the installation of the luminaire, the respective mounting rail is typically attached to the housing first, and then the mounting body, which is equipped with at least one of the aforementioned electrical functional elements of the luminaire, is fixed to the mounting rail. This way, the mounting rail and mounting body enclose an interior space in which essential elements of the luminaire are arranged, such as circuit boards, control gear, contact devices, etc. Typically, both the mounting rail and the mounting body are elongated in a longitudinal direction; preferably, the longitudinal extent is at least five times the extent perpendicular to the longitudinal direction. The mounting rail usually has a U-shaped cross-section perpendicular to the longitudinal direction, extending in a vertical and a transverse direction, open at one vertical end, and formed by a base and two side walls.The mounting rail side walls thus extend vertically from the mounting rail base, and the mounting rail base connects the transversely spaced mounting rail side walls. Opposite the mounting rail base, the mounting rail has an open side. Depending on requirements, the mounting rail base and mounting rail side walls may have contours, recesses, or indentations. The mounting rail base and the mounting rail side walls typically together form a mounting rail interior that is at least partially enclosed by the mounting rail side walls and the mounting rail base. The mounting rail interior is thus defined by the mounting rail. Typically, all mounting rails of a system exhibit the characteristics described here. A system of this type often has at least a first and a second mounting rail, which are connected at their mutually facing longitudinal ends to form the luminaire.Typically, they form a common interior space that extends elongated along the longitudinal extent of both elongated support rails, between the side walls of the support rails and the base of both support rails. The two support rails are usually fixed to each other by means of a coupling with a U-shaped cross-section formed by a coupling base and two coupling side walls. The coupling side walls thus extend vertically from the coupling base, and the support rail base connects the coupling side walls, which are spaced transversely apart. Preferably, the U-shaped cross-section of the coupling is open at its end opposite the coupling base.Typically, each of the support rails has a substantially constant cross-section perpendicular to the longitudinal direction, with the cross-section preferably being identical except for recesses and / or punches in the support rail base and / or support rail side walls. Often, the cross-section of all support rails is essentially the same. The support rails are usually fixed relative to each other perpendicular to the longitudinal direction by the coupling and, in particular, also fixed to each other longitudinally by means of the coupling. In an operating state of the system in which the first and second support rails are fixed to each other, the coupling is typically arranged in the two support rails such that the coupling base extends along both support rail bases and each of the coupling side walls abuts one of its corresponding support rail side walls.

[0003] The support rail is typically attached to the building structure via its base. The mounting bracket is usually positioned on the open side of the support rail, so that the mounting bracket vertically defines the interior space of the support rail and, together with the support rail to which it is attached, encloses an interior space perpendicular to the longitudinal direction. At least in some longitudinal sections, the enclosure of the interior space formed by the support rail and mounting bracket may be interrupted, for example, to allow access to the interior space, such as for ventilation. Preferably, the interior space is continuously enclosed over at least 80%, and in particular at least 90%, of its longitudinal extent.The mounting body often has a cross-section perpendicular to the longitudinal direction, comprising a mounting body base extending in the transverse direction and mounting body side walls extending vertically away from the mounting body base on both transverse sides. The support rail and mounting body are usually manufactured separately. The support rail and / or mounting body are generally preferably and usually each manufactured from a single sheet of metal by forming. Typically, in an operating state of the system in which the system is used as intended, the mounting body is held by a retaining spring on support rail anchors. Various possibilities for implementing such a retaining spring are known in the prior art.Typically, the retaining spring is rigidly connected to the mounting body and has retaining projections that are elastically deflectable in the transverse direction, whereby the transverse direction, when referring to the mounting body, refers to the operating state of the system. Preferably, the support rail retaining anchors are designed as projections.

[0004] To implement a luminaire of this type, supply lines are typically provided, arranged within the interior of the mounting rails. These lines supply the light source and / or other electrical functional elements located on the luminaire's mounting bodies. A system of this type generally preferably features a conductor rail, usually made of plastic, particularly by extrusion or injection molding, which is also elongated in the longitudinal direction, i.e., has an elongated longitudinal extension between its two longitudinal ends. The conductor rail is typically arranged on an inner surface of the mounting rail facing the interior and is fixed to the mounting rail, particularly to the base of the mounting rail and / or to at least one of the side walls of the mounting rail.The conductor rail extends over a substantial portion of the length of the mounting rail, in particular over at least 80% of the longitudinal extent of the mounting rail. Typically, the conductor rail has several channels arranged side by side along a single mounting direction, open to an access side accessible from the interior. In the operating state, the conductor rail is fixed to the mounting rail such that the mounting direction is perpendicular to the longitudinal direction. In one embodiment, the mounting direction in the operating state of the system runs parallel to the transverse direction. The channels preferably extend continuously over the entire length of the conductor rail. In particular, the transverse direction, the longitudinal direction, and the vertical direction are perpendicular to each other.In at least some of the channels, at least one conductor wire is arranged, in particular exactly one conductor wire or exactly two conductor wires, which are held spaced apart from each other in the respective channel, and at at least one longitudinal end of the conductor rail, the conductor wires are usually connected to an external voltage source via which electrical energy, in particular at least partially in the form of electrical signals, can be applied to the conductor wires. The conductor wires can thus serve as supply lines in the mounting rails.For this purpose, an electrical connector is typically arranged at the longitudinal end, which is electrically connected to the conductor wires and through which the conductor wires are supplied with electrical energy, and / or a power supply device is provided, which is arranged on an access side of the busbar pointing along the vertical or transverse direction and is connected to the conductor wires and is itself powered or can be powered by an external power source. Such a power supply device often has a mounting device and, on a contact side, power supply contacts that, in an operating state or in the case of a realized luminaire, are arranged in at least some of the channels of the busbar to supply power to the conductor wires and contact the conductor wire located therein.The feed-in contacts are typically arranged side by side in the same orientation as the conductor wires and the contacts of a contact device (which will be explained in more detail elsewhere). Usually, an electrical connector is provided at each longitudinal end of the busbar. These electrical connectors can be designed as mating connectors, for example, one as a plug to a second as a socket. By providing at least one connector at at least one longitudinal end of the busbar, adjacent busbars can be electrically connected, allowing the conductor wires to form a through-wiring connection.

[0005] In typical embodiments, the system also often includes a contact device that establishes electrical contact between the conductor wires associated with the busbar and at least one electrical functional element of the mounting body. The contact device is usually fixed to the mounting body and ensures an electrical connection of the at least one electrical functional element when the mounting body is in the system's operating state or in its intended position on the mounting rail in which the luminaire is installed. The contact device is designed to engage the channels from the access side of the mounting rail to contact the conductor wires.For this purpose, the contact device has several contact units arranged side by side in one direction, whereby, in the operating state of the system, each of the contact units is electrically conductively connected to one of the conductor wires arranged in the channels of the busbar. In the operating state, the arrangement direction, which is defined with reference to the contact device, is parallel to the alignment direction, which is defined with reference to the busbar.To connect the conductor wires, the contact device is positioned with its contact side on the access side of the busbar. The contact units are inserted into the channels along a defined insertion direction, determined by the arrangement of the contact units. This insertion direction is typically perpendicular to the arrangement direction and, corresponding to the operating state, perpendicular to the mounting direction. Each contact unit has a contact that, in the operating state, makes electrical contact with one of the conductor wires.

[0006] Standardized systems are used in a wide range of applications, such as warehouses, production halls, supermarkets, and open-plan offices, employing luminaires with multiple mounting rails and mounting bodies. The basic principle of luminaires manufactured using this standardized system is that the mounting rails form the electrical and mechanical infrastructure of the luminaires, while the mounting bodies are attached to the mounting rails and contain the electrical functional elements required for the respective application. Naturally, at least some of these electrical functional elements are typically designed as lighting modules with light sources, particularly LED boards.For example, alternatively or additionally, other electrical functional elements can be provided on the respective mounting body, such as a presence sensor (e.g., infrared sensor), a camera, a radio module, etc. The electrical functional elements are usually fixed to the mounting body.

[0007] In typical applications, systems of this type are used such that several luminaire components, each comprising a mounting rail as described above, are arranged longitudinally one behind the other and connected to each other. Further components of the respective luminaire component can be arranged on or in the mounting rails of the luminaire components. For example, light sources and supply lines can be attached to the mounting rails, for example, directly to the mounting rails, for example, by providing a mounting body and / or a conductor rail as described above. For example, each luminaire component can comprise a mounting rail, a conductor rail, a mounting body, and, in particular, a coupling attached to the mounting rail.The luminaire components are arranged longitudinally one behind the other, with the mounting rails of the respective luminaire components mechanically connected to each other by means of the coupling. The supply lines running in the mounting rails, in particular the conductor wires arranged in the conductor rails of the luminaire components, are electrically connected to each other in pairs, i.e., one conductor wire of the first luminaire component is connected to one conductor wire of the second luminaire component. This allows for the creation of very elongated luminaires, as required in a variety of applications. In particular, the conductor rails of two adjacent luminaire components, whose mounting rails are mechanically fixed to each other by a coupling, can be connected to each other by an electrical connector that connects the conductor wires arranged in pairs in the two conductor rails.In particular, the conductor rails and the electrical connector are fixed in their relative positions by the coupling, which defines the position of the mounting rails of the luminaire components. Thus, a luminaire of the respective system comprises a multitude of mounting rails and, in particular, a multitude of mounting bodies and / or conductor rails, or a multitude of luminaire components, which are connected to each other as described.

[0008] Since luminaires of this type typically have a considerable length, often more than 5 m, often more than 10 m, often more than 20 m, often more than 50 m, it is necessary to connect a large number of mounting rails to each other to create the luminaire using a system of this type. The mounting rails are usually supplied with the coupling pre-installed at the factory, with one longitudinal section already inserted into the respective mounting rail and another longitudinal section protruding from it. This second section is then inserted into another mounting rail to fix the two mounting rails to each other.For the installation of the electrical components, especially the light sources, the contact devices are positioned with their contact surfaces inside the mounting rail on the access side of the busbar, so that the component connected to the respective contact device can be electrically connected to at least some of the conductor wires via the contact device. Often, the conductor wires are made contact by the contact device in such a way that a mounting body with a pre-mounted contact device is positioned at the open end of the mounting rail, and the contact units of the contact device are inserted into the channels of the busbar while the contact device is fixed to the mounting body.The insertion of the contact units into the conductor channels often occurs during and due to the same movement of the mounting body relative to the mounting rail that is used to position and attach the mounting body to the open end of the mounting rail, thus closing the open side. Since a conductor rail of a system of this type typically has a large number of channels arranged side by side in the direction of the conductors, typically at least ten, preferably at least thirteen, ensuring correct contact of the conductors arranged in the channels is not straightforward. It must be taken into account that the conductor rail, with all its channels, usually extends over a limited area in the direction of the conductors, so that the conductor rail, and thus a luminaire manufactured using the system, does not have to be excessively large.The busbar typically extends less than 20 cm in its overall length in the direction of assembly, and in particular less than 15 cm. The channel walls separating the clear cross-sections of two adjacent channels of the busbar typically have a wall thickness of less than 5 mm, and in particular less than 4 mm, and in particular less than 3 mm. The contact device and its contact units must therefore be carefully aligned relative to the busbar so that their contact units can engage in their respective designated channels. Furthermore, measures should be taken to prevent the contact device from being incorrectly inserted onto the busbar, such that it is rotated 180° relative to its intended orientation.It should be taken into account that each of the conductor wires arranged in the channels of the busbar is usually assigned a specific function, for example the function as data conductor, neutral conductor, phase conductor or PE conductor, so that a correct positioning of the contact device relative to the busbar or a correct contacting of the contact units on the conductor wires intended for them is necessary for the correct functioning of a luminaire and also in terms of safety aspects.

[0009] Due to the fundamental design of this type of system, very elongated lighting structures can be implemented cost-effectively and advantageously. However, because of the U-shaped cross-section of the mounting rails, such luminaires are initially designed only for direct lighting. For this purpose, mounting bodies are typically provided on the open side of the mounting rails, to which LED light modules are attached. These modules are designed to emit light away from the interior of the mounting rail and thus downwards. To implement wide-beam luminaires or even luminaires that also provide at least partial indirect lighting, i.e.,To emit light not only for indirect illumination in the hemisphere below the light sources, but also for indirect illumination in the hemisphere above the light sources, so that the light is only emitted downwards after reflection, usually from a ceiling, light-directing elements are typically used on the underside of the mounting body. These include, for example, TER optics and / or covers with prisms, so that at least a certain proportion of the emitted light is directed upwards at a wide beam angle or even with a directional component. However, such optical systems are expensive to implement and can only provide indirect illumination to a limited extent without protruding significantly laterally beyond the mounting rail, thus resulting in an undesirable design. Therefore, the versatility of such systems is limited.Besides the challenge of meeting the requirement to also provide indirect lighting, this lack of variability is also disadvantageous in many other respects. Because the cross-section of the mounting rails is usually kept as delicate and therefore as small as possible, and because the mounting rails and the connection concept between them are tailored to this cross-section, the mounting rails, which serve as the infrastructure, can only accommodate a limited number of components. To provide lighting installations that meet varying levels of complexity, it is therefore necessary to offer systems with mounting rails of different cross-sections. However, this involves considerable effort.

[0010] For example, KR 101 339 301 B1 discloses a lighting system with a mounting rail and a lighting module designed for direct and indirect lighting. For example, DE 10 2021 202 975 A1 discloses a system with a mounting rail in which, in one embodiment, an assembly with electronic components is arranged on the inside of the base of the mounting rail and, on the other hand, an assembly with electronic components is arranged on the outside of the base of the mounting rail.

[0011] The present invention is based on the objective of providing a system for realizing a longitudinally elongated luminaire, an elongated luminaire and / or a method for realizing a longitudinally elongated luminaire, which eliminates at least one disadvantage of generic systems, luminaires and / or methods.

[0012] As a solution to the problem underlying the present invention, the invention proposes a system with the features according to claim 1. The system is designed to realize a longitudinally elongated luminaire or a longitudinally elongated luminaire component. The system comprises a longitudinally elongated support rail with a U-shaped cross-section, which has a support rail base extending in a transverse direction between two support rail side walls and an open side opposite the support rail base in a vertical direction. The support rail side walls extend away from the support rail base in the vertical direction.The system further comprises a mounting body which, in an operating state of the system, is arranged on the open side of the mounting rail and fixed to the mounting rail. In this operating state, the mounting body, together with the mounting rail, encloses an interior space intended for housing electrical components. Naturally, the system can comprise multiple mounting bodies which, in the operating state, are arranged longitudinally one behind the other on the open side of the mounting rail and fixed to the mounting rail. Similarly, the system can, of course, comprise multiple mounting rails which, in the operating state, particularly for the purpose of arranging luminaire components, are arranged longitudinally one behind the other and connected to each other by a coupling as described for systems of this type.According to the invention, the system comprises at least one extension element, at least one longitudinally elongated extension mounting body, and at least two longitudinally elongated extension side walls. In the operating state, the extension element is arranged on an outer surface of the support rail base facing away from the interior and is fixed to the support rail.In the operating state, the extension mounting body and the extension side walls are held relative to the mounting rail by means of the extension element in such a way that the extension mounting body is vertically spaced from the outside of the mounting rail base and the extension side walls are arranged on each transverse side of the extension mounting body, so that the extension side walls together with the extension body and the outside of the mounting rail enclose an extension interior space intended for receiving electrical extension components.The invention thus takes a special approach by forming an extension space vertically above the interior of the support rail on the outside of the support rail. This extension space is bounded at its top by the extension mounting body, at its transverse sides by one of the extension side walls each, and at its bottom by the support rail base. The extension element is particularly preferably designed to be fixed to the support rail without tools and / or to be detachable from the support rail without tools. Because the extension element can be fixed to the support rail without tools, or can be detached from the support rail without tools starting from the operating state, the extension space can be provided from the outside of the support rail in a particularly simple manner.The extension element is preferably designed to be snapped onto the support rail, preferably by being placed on the outside of the support rail base along the vertical direction. The snapping action can occur, for example, on the outside of the support rail base itself or on an undercut in each of the support rail side walls. Preferably, the support rail side walls have a stepped contour extending from the support rail base, forming an undercut. In one embodiment, the underside of the extension interior can be bounded solely by the outside of the support rail base, while in another embodiment, it can be bounded by the outside of the support rail base together with a stepped section in each of the support rail side walls.Preferably, the extension mounting body and / or the extension side walls are fixed to the extension element without tools and / or can be removed without tools. Preferably, the extension mounting body and / or extension side walls are fixed to the mounting rail without tools and / or can be removed without tools by means of the extension element, so that they can be fixed relative to the mounting rail without tools to achieve the operating state and / or can be removed from the mounting rail without tools once in the operating state using the extension element. A tool-free connection between the extension mounting body or extension side wall and the extension element can preferably be ensured by means of a snap-fit ​​mechanism.Preferably, the extension mounting body extends with its transverse length over at least 70%, and in particular at least 80%, of the transverse length of the mounting rail. Preferably, the extension side walls, in the operating state, rest at one end, and in particular directly against, one of the mounting rail side walls. Preferably, the extension mounting body and the mounting body have the same transverse length.Preferably, the extension interior has a vertical extension length of at least 50%, in particular at least 70%, in particular at least 80%, in particular at least 90% of the vertical extension length of the interior enclosed by the support rail and mounting body in the operating state, and / or a transverse extension length of at least 50%, in particular at least 70%, in particular at least 80%, in particular at least 90% of the transverse extension length of said interior.

[0013] In one embodiment, the extension element has a locking device by which it is releasably locked to the mounting rail in the operating state. Preferably, the locking device is provided in a lower vertical end section of the extension element, which extends upwards from the lower vertical end of the extension element over less than 30%, and in particular less than 20%, of the total vertical length of the extension element. The terms "downwards" and "upwards" refer to opposite directions along the vertical axis in the operating state. In the operating state, the interior of the extension is located above the interior enclosed by the mounting rail and the mounting body, and the mounting body for the extension is located above the outer surface of the mounting rail base.In one embodiment, the locking device has two locking arms, each associated with one of the support rail side walls and designed to lock onto the respective support rail side wall or onto a section of the support rail base adjacent to the support rail side wall associated with the respective locking arm. The two locking arms are thus spaced apart from each other in the transverse direction and engage two transversely spaced sections of the support rail, either on one of the support rail side walls or on a section of the support rail base that is associated with and adjacent to one of the support rail side walls. The locking arms are thus preferably designed to ensure locking onto either the respective support rail side wall or a section of the support rail base adjacent to the respective support rail side wall.By providing two locking arms spaced apart in the transverse direction, a particularly reliable fixation of the extension element to the mounting rail can be ensured. Preferably, each locking arm has several locking arm sections spaced apart along its longitudinal direction. This spacing of locking arm sections allows for particularly easy locking of the locking arm sections to the mounting rail and also provides redundancy, since even if one locking arm section breaks, the remaining locking arm sections of the respective retaining arm can still ensure locking of the extension element relative to the mounting rail. Preferably, each locking arm has at least two, in particular at least three, and in particular exactly three, such locking arm sections.Preferably, each of the locking arm sections has a locking projection pointing along the transverse direction towards the transverse center of the extension element. Preferably, the two locking arms are connected to each other by a crossbeam of the extension element extending along the transverse direction. It is essential that the crossbeam is continuous along the transverse direction so that it can reliably connect the two locking arms, which are spaced apart in the transverse direction. The crossbeam can be formed by a single crossbeam extending along the longitudinal and vertical directions or by several spaced-apart crossbeam sections.Preferably, the crossbeam has a greater length along its longitudinal axis than along its vertical axis. Preferably, the longitudinal length of the crossbeam is at least three times, particularly at least five times, and especially at least ten times, its vertical length. The crossbeam preferably has a groove extending along its longitudinal axis. The groove preferably extends over the entire length of the crossbeam along its longitudinal axis. The groove can advantageously provide spring elasticity to the crossbeam, allowing locking arms to move relative to each other along the transverse direction under spring-elastic deformation of the crossbeam. This can particularly facilitate the locking of the locking device to the support rail. Preferably, the crossbeam has at least one groove on its underside.Preferably, the crossbeam has at least two grooves spaced apart along the transverse direction, and in particular, parallel to each other and running longitudinally. Preferably, the crossbeam has a cable strain relief device accessible from its upper surface. Preferably, the cable strain relief device is designed as a loop extending vertically upwards from the upper surface of a section of the crossbeam extending along the transverse direction. More generally, the cable strain relief device preferably has a clear cross-section through which a cable or, more preferably, a cable retaining device, such as a cable tie, can pass. Preferably, the clear cross-section of the cable strain relief device is fully enclosed, so that, for example, such a retaining device can be particularly reliably fixed to the cable strain relief device.Preferably, the clear cross-section runs perpendicular to the transverse direction. Preferably, the cable strain relief device is provided in a transversely central region of the extension element and is spaced from each transverse end of the extension element by at least 20%, more particularly at least 30%, more particularly at least 40% of the total transverse extension length of the extension element.

[0014] In one embodiment, the support rail side walls each have a recess in an upper end region, with a recess base forming a transverse end and at least one recess side forming a vertical end. Preferably, the recess is U-shaped in cross-section, i.e., in the cross-section perpendicular to the longitudinal direction, such that the recess base is formed by the bottom of the U and the recess side is formed by one of the legs of the U. Such a recess can improve the stability of the support rail and / or serve to fix, for example, a conductor rail and / or the coupling and / or a mounting element. The recess forms an undercut in the support rail side wall, which can serve to fix the conductor rail, mounting element, or coupling accordingly.

[0015] Preferably, the locking device has two locking arms, each forming at least a section of a transverse side of the extension element, with each locking arm being engaged with a different one of the two support rail side walls in the operating state. Preferably, the extension element has the two locking arms in its lower end section. Preferably, in the operating state, the locking device either surrounds the support rail base or is engaged in recesses in the support rail base. In one embodiment, the support rail has an undercut on each of its support rail side walls, which is engaged by the locking device in the operating state. Preferably, the undercut is formed on the outside of the respective support rail side wall, with the locking device engaging transversely from the outside into the undercut.Preferably, the engagement of the locking mechanism in the undercuts of the support rail side walls generates a vertical contact pressure, which presses the extension element vertically from above against the outer surface of the support rail base. Preferably, the undercut is formed by the described indentation. Preferably, the locking mechanism engages exclusively with its two locking arms, as described above, in the undercut of the respective support rail side wall. Preferably, the extension element is placed onto the support rail base from above, with the locking arms sliding along their respective support rail side walls during placement. This causes an elastic deformation of the extension element until the locking arms, with their respective locking projections, engage in the undercut of the respective support rail side wall, at which point the extension element returns to its original shape due to its spring elasticity.

[0016] In one embodiment, the extension element has a fixing device by means of which the extension mounting body and the extension side walls are held in a latched position on the extension element during operation. In one embodiment, the extension element, and in particular the fixing device, encompasses the extension mounting body transversely on both sides during operation. The fixing device preferably comprises several spaced-apart fixing device components, wherein at least some of the fixing device components ensure a latching action and, for example, some of the fixing device components can form a stop for the extension mounting body and / or the extension side walls and / or a pivot bearing for the extension mounting body and / or extension side walls.In one embodiment, the fixing device comprises a first fixing unit for locking onto the extension mounting body and a second fixing unit for locking onto the extension side walls. Preferably, each fixing unit can comprise at least some of the fixing device components described. In one embodiment, the first fixing unit encompasses the extension mounting body transversely on both sides. In another embodiment, the second fixing unit encompasses each of the extension side walls vertically on both sides or is encompassed vertically on both sides by each of the extension side walls.By having one element gripped on both sides by another element in a specific direction, the element with two sections pointing away from each other in opposite directions along the specified direction is positioned between two sections of the other element that point towards each other along the specified direction, so that the position of one element relative to the other element along the specified direction is fixed by the gripping action. Preferably, the aforementioned sections of one element and the aforementioned sections of the other element are in abutting each other, so that movement of the elements relative to each other along the specified direction is prevented. In one embodiment, both fixing units each comprise side units spaced apart from each other in the transverse direction.Preferably, each of the side units of the second fixing unit is assigned to a different extension side wall, so that each side unit of the second fixing unit fixes its assigned extension side wall. In one embodiment, each of the side units of the first fixing unit is assigned to a different mounting body side wall and rests against a different mounting body side wall.

[0017] In one embodiment, the second fixing unit extends beyond the first fixing unit. Preferably, the second fixing unit extends vertically further from the outside of the support rail base than the first fixing unit. Thus, the upper vertical end of the second fixing unit preferably terminates above the upper vertical end of the first fixing unit. This particularly advantageously ensures that the extension side walls can each be held in an upper section by the second fixing unit and that the extension mounting body can be concealed laterally as much as possible by the extension side walls. In one embodiment, each of the fixing units forms a section of a transverse outer surface of the extension element with each of its side units. This particularly advantageously ensures simple and releasable fixing.Preferably, the second fixing unit forms a section of a transverse outer surface of the extension element with each of its side units. The extension element has two transverse outer surfaces pointing away from each other along the transverse direction. Preferably, each of the side units forms a section of exactly one transverse outer surface of the extension element assigned to it. In one embodiment, the other of the two fixing units forms a section of a transverse inner surface of the extension element. Preferably, the other of the two fixing units is the first fixing unit. Preferably, each of the two side units of the other fixing unit forms a section of exactly one inner surface of the extension element assigned to it, the two inner surfaces pointing towards each other along the transverse direction.In one embodiment, the second fixing unit has two side units spaced apart in the transverse direction, each assigned to exactly one of the two extension side walls, such that each side unit of the second fixing unit fixes its assigned extension side wall without the other side unit contributing to this action. In another embodiment, each of the side units has at least two sections spaced vertically apart by at least 20% of the total vertical extent of its assigned extension side wall. In the operating state, these sections engage behind their respective assigned sections of the extension side wall to fix the assigned extension side wall. The sections of the extension side wall are thus spaced apart by at least 20% of the total vertical extent of the extension side wall along the vertical direction.By interlocking vertically spaced sections, a particularly reliable fixation of the extension side wall can be ensured. Preferably, the sections are vertically spaced from each other by at least 30%, more preferably at least 50%, more preferably at least 60% of the total vertical extension length of the respective extension side wall. Preferably, the vertically spaced sections surround the associated sections of the extension side wall along the vertical direction, or the associated sections of the extension side wall surround the vertically spaced sections of the side unit along the vertical direction.Preferably, a positive fit along the transverse direction is ensured by the interlocking of the section and its respective associated section, so that the extension side wall can only be moved relative to the side unit along the transverse direction by releasing the interlocking. In one embodiment, a first section of the respective associated extension side wall can be vertically attached to a first section of the respective side unit, and subsequently, a second section of the respective associated extension side wall can be transversely attached to a second section of the respective side unit by interlocking this second section of the side unit. The first and second sections can be the vertically spaced sections described above.The first section of the extension side wall can be vertically attached to the first section of the side unit, ensuring a transverse engagement, so that the relative position of the first sections is determined by the attachment along the transverse direction. The second section of the extension side wall can be snapped onto the second section of the side unit, ensuring a transverse engagement. Preferably, the first section of the extension side wall can be vertically attached to the first section of the side unit, allowing the extension side wall to rotate relative to the side unit about an axis parallel to the longitudinal direction. This allows the second section to be snapped into place and thus engage by rotating the first section of the extension side wall onto the first section of the side unit.The sections described are preferably each one of the described fixing device components.

[0018] In one embodiment, the extension element has a cross-section perpendicular to the longitudinal direction, resembling an H-shape, comprising a transverse crossbar and two vertical beams connected by it. Preferably, in the operating state, the crossbar is pressed vertically against the outer surface of the support rail base. In one embodiment, the vertical beams form at least part of the locking mechanism. In another embodiment, each of the vertical beams engages an undercut in its respective support rail side wall. More generally, each of the vertical beams is associated with exactly one of the two support rail side walls. Preferably, the vertical beams engage the support rail base below the crossbar, and more preferably, they also engage an upper end section of the two support rail side walls.Preferably, the vertical beams engage behind the two support rail side walls below the crossbeam in the operating state. Preferably, the vertical beams together form the first fixing unit. Preferably, in the operating state, the extension mounting body is held on the vertical beams and vertically spaced from the crossbeams. Preferably, the vertical beams form at least the predominant part of the second fixing unit of the fixing device, in particular the second fixing unit of the fixing device. Preferably, the vertical beams form the fixing device and at least part of the locking device. Preferably, the vertical beams, in particular with lower vertical beam sections, and especially with vertical beam sections running exclusively below the crossbeam, form the two locking arms of the locking device described above.In one embodiment, the crossbeam has at least one groove, and in particular at least two grooves, especially on its underside. In another embodiment, the vertical beam sections, in particular the lower vertical beam sections described above, each form one of the locking arms of the locking device, in particular forming locking arm sections of the respective locking arm that are spaced apart from one another along the longitudinal direction. Each of the vertical sections can, for example, have several partial vertical sections, each of which forms one of the locking arm sections. In another embodiment, the crossbeam has a strain relief device accessible from its upper side. The strain relief device can be designed as described in relation to the embodiments described herein.

[0019] In one embodiment, the extension side walls are identical. Preferably, the extension side walls are made of metal, in particular aluminum. In one embodiment, the extension side walls are manufactured by means of an extrusion process or a bending process. Generally, the extension side walls preferably have a constant cross-section perpendicular to the longitudinal direction along their entire length. Manufacturing by means of an extrusion or bending process can enable a particularly cost-effective realization of the extension side walls such that they are designed along their entire length corresponding to the fixing device, so that the fixing device can be fixed to the extension side walls within each longitudinal section of the extension side walls. In one embodiment, the extension element is made of plastic, in particular as a plastic injection-molded part.

[0020] In one embodiment, the extension element with the extension mounting body attached to it can be placed on the base of the support rail from the outside and fixed to the support rail. In another embodiment, the extension element with extension side walls attached to it can be placed on the base of the support rail from the outside and fixed to the support rail. In yet another embodiment, the extension element with the extension mounting body and extension side walls attached to it can be placed on the base of the support rail from the outside and fixed to the support rail. In the advantageous embodiments, extension mounting bodies or extension side walls can thus be fixed to the extension element independently of the fixing of the extension element to the support rail, in particular, they can be detachably fixed, and in particular, fixed without tools, as explained here. The fixing of the extension mounting body or extension side walls is thus possible without tools.The addition of extension side walls relative to the extension element can thus be done independently of the extension element's fixation to the mounting rail. Accordingly, the extension element can be fixed to the mounting rail on its own, as explained, regardless of whether extension mounting bodies or extension side walls have already been attached to it. The described advantageous embodiments offer, firstly, a particularly high degree of modularity, and secondly, they enable a particularly simple realization of an extension interior during assembly, since the extension element, extension side walls, and extension mounting bodies can be placed together as a self-contained extension component from above onto the outside of the mounting rail and fixed to the mounting rail.

[0021] In one embodiment, the mounting body is fixed in the operating state by means of a retaining spring, either fixed to or integrated into the mounting body, which engages a retaining projection formed on the inner side wall of each support rail. The retaining spring can be released from the support rail, starting from the operating state, by deflecting the retaining spring. In another embodiment, the extension mounting body is engaged from behind by the extension element in the operating state, in particular vertically and / or transversely on both sides, and can be released from the extension element, starting from the operating state, by deflecting the extension element.While in one embodiment the mounting body has a deflectable retaining spring in the operating state, or such a deflectable retaining spring is fixed to the mounting body, and the mounting body can be fixed and released relative to the support rail by deflecting the retaining spring, the extension mounting body can be released from the operating state by deflecting the extension element or the first fixing unit of the fixing device relative to the extension element and preferably also from the support rail.

[0022] In one embodiment, the mounting body and the extension mounting body each have a U-shaped cross-section with a mounting body base extending transversely between two mounting body side walls and with an open side vertically opposite the mounting body base. In the operating state, the mounting body closes the open side of the support rail with its mounting body base, its mounting body side walls extending vertically from its mounting body base towards the inside of the support rail base. In the operating state, the extension mounting body is vertically spaced from the support rail base with its mounting body base, its mounting body side walls extending vertically from the mounting body base of the extension mounting body towards the outside of the support rail base.Preferably, the mounting body sidewalls extend at least partially within the interior of the support rail during operation, whereas the mounting body sidewalls of the extension mounting body extend completely outside the interior of the support rail during operation. In one embodiment, the mounting body sidewalls rest vertically against a retaining projection associated with each of them during operation. This projection is formed by each of the two support rail sidewalls within the interior of the support rail. Preferably, the mounting body sidewalls are vertically spaced from the support rail base at their vertical ends facing the base. In particular, the extension element has an H-shaped cross-section perpendicular to the longitudinal direction, and the crossbeam runs vertically between the extension mounting body and the support rail base. This configuration is based, of course, on the operating state.

[0023] In one embodiment, the system components can be arranged in an alternative operating state, wherein in the alternative operating state the extension mounting body functions as a mounting body and the mounting body functions as an extension mounting body, and wherein otherwise the system components are arranged identically to each other in the alternative operating state and the operating state. Thus, the extension mounting body and the mounting body are each designed to be used both as extension mounting bodies and as mounting bodies.In one embodiment, the extension mounting body and the mounting body are identical; in another embodiment, the extension mounting body and the mounting body differ, but each is suitable to function as both an extension mounting body and a mounting body, so that both the operating state in which the mounting body is fixed to the open side of the support rail and the extension mounting body is fixed to the support rail by means of the extension element arranged above the outside of the support rail base, and the alternative operating state in which the extension mounting body is fixed to the open side of the support rail and the mounting body is fixed to the support rail by means of the extension element arranged above the support rail, are possible.In one embodiment, the system comprises at least two identically designed mounting bodies, a first of which is arranged on the open side of the mounting rail in the operating state and fixed to the mounting rail, enclosing the interior together with the mounting rail; and a second of which, in the operating state, forms the extension mounting body and is fixed to the mounting rail by means of the extension element, enclosing the extension interior together with the mounting rail. The described particularly advantageous embodiments allow the system to be provided with high functionality at a particularly low cost, and furthermore, the handling of the system can be greatly simplified.

[0024] In one embodiment, the system comprises both a mounting body designed as a purely plastic cover and a mounting body designed as a support to which an electrical contact device and at least one electrical functional element, in particular at least one LED module and / or a control gear conductively connected to the electrical contact device, are attached. In the operating state, the mounting body designed as a purely plastic cover serves only to close the open side of the mounting rail, which can be advantageous both for the visual appearance and for protecting the interior.Preferably, in the operating state, several mounting bodies are fixed to the open side of the support rail as described, so that together with the support rail they enclose the interior. Some of the mounting bodies are designed as a plastic cover, and others are designed as a carrier to which the contact device and functional element are fixed. All of these mounting bodies are arranged one behind the other along the longitudinal direction on the support rail. The system can, of course, also have several support rails and several mounting bodies. In the operating state, the support rails are arranged one behind the other along the longitudinal direction and fixed to each other, and the various mounting bodies are arranged one behind the other along the longitudinal direction on the support rails, so that together with the support rails they enclose the interior.In one embodiment, the system comprises both an extension mounting body designed as a pure plastic cover and an extension mounting body designed as a support, to which an electrical extension contact device and at least one electrical extension functional element, in particular at least one LED module and / or a control gear conductively connected to the electrical extension contact device, are fixed. The extension contact device and the extension functional element can be designed analogously to the contact device and functional element, respectively, or differently from them.For example, the contact element of the mounting body can be designed, as explained for generic systems, to engage with its contacts in the channels of a conductor rail arranged in the mounting rail during operation, thereby electrically contacting the conductor wires arranged therein, whereas the extension contact element merely comprises a terminal block or connecting cable for connection to a terminal block. The extension functional element can be, for example, an LED module and / or control gear, but in other embodiments it can also be a functional element for extending the function of a luminaire, such as a light sensor, motion detector, camera and / or a WLAN module.

[0025] In one embodiment, the system comprises at least one end cap, wherein the end cap has a first retaining contour and each longitudinal end of the support rail is formed by a longitudinal end region of the support rail which has a second retaining contour. In the operating state, the first retaining contour interacts with the second retaining contour, fixing the first and second retaining contours relative to each other. By fixing the first and second retaining contours relative to each other, the end cap is fixed to the support rail in the operating state. Preferably, in the operating state, the first retaining contour is arranged at least partially within the cross-section of the support rail, and in particular, completely within the cross-section of the support rail. In one embodiment, the second retaining contour is formed at least predominantly by an inner surface of the support rail.In its operating state, the end cap closes one longitudinal end of the interior space and thus the open end of the support rail provided at one longitudinal end. Preferably, the end cap has an extension area that, in its operating state, extends vertically beyond the base of the support rail and closes one longitudinal end of the extension area. In one embodiment, the system has two different end caps, both of which have a first retaining contour as described, which corresponds to the second retaining contour. Only one of the two end caps is suitable for realizing the operating state and has the described extension area. The other end cap is suitable for realizing a reduced-functionality operating state by being arranged at one longitudinal end of the support rail and closing the longitudinal end of the interior space, but not closing the extension area at one longitudinal end.One such end cap can advantageously be used to implement system light sources that do not have an internal expansion space and therefore no expansion element, expansion mounting body, or expansion side walls. The other of the two different end caps, which encompasses the expansion area, is designed to implement the described operating state.

[0026] In one embodiment, the extension side walls each have a fixing contour, wherein, in the operating state, a first longitudinal section of the fixing contour engages a fixing section of the extension area of ​​the end cap, and a second longitudinal section of the fixing contour engages the fixing device of the extension element. In this particularly advantageous embodiment, the extension side walls are each fixed to both the end cap and the extension element by their fixing contour. The fixing contour preferably has an identical cross-section along its longitudinal extent. This ensures a particularly reliable fixing of the extension side walls, support rail, and end cap to one another in a particularly simple manner. More preferably, the fixing contour has the same cross-section perpendicular to the longitudinal direction in both the first and second longitudinal sections.Generally preferred, by engaging behind the fixing contour, i.e., both with regard to engaging behind the fixing section of the extension area of ​​the end cap and with regard to engaging behind the fixing device of the extension element, a relative position of the respective extension side wall relative to the extension element or relative to the end cap is determined along the transverse direction, preferably also a relative position of the respective extension side wall relative to the extension element or relative to the end cap along the vertical direction.

[0027] In one embodiment, the system comprises a clamp-like ceiling mounting element with two clamp legs that, in the operating state, engage behind the undercut of one of the support rail side walls and are connected to each other by a clamp base with a mounting connection. Each clamp leg is thus associated with one of the support rail side walls and engages behind the undercut formed by that support rail side wall. The mounting connection can be designed, for example, as a hook or a screw connection. The mounting connection allows for easy connection to a ceiling by means of a ceiling mounting component fixed to the ceiling, for example, by means of a cable that can be connected to the hook, or by means of a cable to which a nut or bolt is attached, corresponding to the screw connection.In a particularly advantageous embodiment, the support rail side walls each form an undercut, wherein both the clamp-like ceiling mounting element and the extension element engage behind the undercut formed by the support rail side walls in the operating state, thus ensuring the respective fastening. In one embodiment, the extension element and the ceiling mounting element are arranged in different longitudinal sections, so that they each engage behind a different section of the undercuts of the support rail side walls.

[0028] In one embodiment, the system comprises a longitudinally elongated conductor rail, which is arranged in the interior during operation. The conductor rail has longitudinally elongated channels arranged side-by-side in a mounting direction perpendicular to the longitudinal direction. These channels are open at one access side of the conductor rail, and each channel contains a longitudinally elongated conductor wire. Preferably, the mounting direction during operation runs along the transverse direction. In one embodiment, the extension element comprises at least one cable clamp configured to hold a round cable, which runs longitudinally within the extension interior during operation, perpendicular to the longitudinal direction. The cable clamp can, for example, be designed as a slotted ring capable of gripping a round cable perpendicular to the longitudinal direction.Preferably, this ring has a diameter of at least 5 mm, and particularly at least 10 mm. The cable clamp ensures particularly easy fixation of a cable running longitudinally within the extension's interior. Preferably, in the operating state, a functional element arranged on the extension mounting body is connected to the cable. Preferably, the cable supplies power to the functional element. Preferably, the functional element is designed as a control device that supplies another functional element, designed as an LED module, which in turn is supplied by the cable. In one embodiment, the cable runs without branching along a longitudinal extension of the extension mounting body, without being connected to a functional element.The cable clamp thus allows for the simple extension of the functional element located on an extension mounting body, and, independently of the provision of functional elements on extension mounting bodies, it also ensures the easy fixing of a cable on the outside of the mounting rail base, thereby enabling the infrastructure provided by the mounting rails in a room to also be used for routing cables independent of the luminaire when implementing a light fixture.

[0029] In one embodiment, the system comprises several extension elements which, in the operating state, are fixed to the mounting rail at intervals along their longitudinal direction and which are each fixed to an identical extension mounting body and to two identical extension side walls. Thus, in this preferred embodiment, the extension mounting body and the extension side walls are fixed to the mounting rail by means of the multiple extension elements. Preferably, the extension elements are each identical.Preferably, the system comprises several support rails arranged one behind the other along the longitudinal direction, wherein two adjacent support rails are fixed to each other by a coupling, wherein the several extension elements are arranged distributed along the longitudinal direction over the two support rails and are fixed to one of the two support rails as explained, wherein the extension mounting body and / or at least one of the two extension side walls, in particular both extension side walls, extend along both support rails with respect to the longitudinal direction.

[0030] The invention further relates to a method for realizing a luminaire component or a luminaire comprising such a luminaire component. The luminaire component has a longitudinally elongated support rail with a U-shaped cross-section, which is designed as described above. The support rail accordingly has an open side, wherein a mounting body, which can be designed as described above, can be arranged on the open side of the support rail such that it, together with the support rail, encloses an interior space of the luminaire perpendicular to the longitudinal direction, and an electrical functional element arranged on the mounting body is located within the interior space.In one embodiment, the luminaire component comprises such a mounting body. In another embodiment, the luminaire component is configured such that a mounting body for jointly enclosing the interior space with a mounting rail is arranged on the open side of the mounting rail encompassed by the luminaire component. According to the invention, an extension element is placed on the base of the mounting rail from the outside and fixed to the mounting rail. By means of the extension element, an extension mounting body and two extension side walls are fixed to the outside of the mounting rail in such a way that the extension mounting body and the extension side walls, together with an outer surface of the mounting rail, enclose an extension interior space. The method according to the invention may have further advantageous properties, which are described in connection with embodiments of the system according to the invention.In particular, the method according to the invention can include fixing an end cap to a longitudinal end of the support rail and fixing each of the extension side walls to both the extension element and the end cap. In particular, the method according to the invention can include the process step of jointly placing the extension element, extension mounting body, and extension side walls onto the outside of the support rail base from the outside in a single process step. In such a method, the extension element, extension mounting body, and extension side walls together form an extension component, which is preferably realized in a preceding process step by fixing the extension mounting body and extension side walls to the extension element. Of course, it is generally preferred that the extension element, extension mounting body, and extension side walls are each manufactured separately.The extension element is preferably designed as a single-piece component. Each of the extension side walls is preferably designed as a single-piece component. The extension mounting body is preferably designed as a single-piece component. The support rail and / or the mounting body are preferably designed as single-piece components. The extension element is preferably made of plastic, in particular as an injection-molded part. The mounting body, the extension mounting body, and the support rail are each preferably manufactured from a single sheet of metal by forming. The extension side walls are preferably manufactured from metal by extrusion or compression molding.

[0031] The invention further relates to a luminaire manufactured by means of an embodiment of a system according to the invention and / or an embodiment of a method according to the invention. In the case in which the luminaire is manufactured by means of an embodiment of the method according to the invention, the luminaire comprises a luminaire component manufactured by means of the method and comprising at least one mounting rail, an extension element, an extension mounting body, and two extension side walls. The luminaire comprises a mounting body that is arranged on the open side of the mounting rail and, together with the mounting rail, encloses an interior space of the luminaire perpendicular to the longitudinal direction. An electrical functional element is arranged on the mounting body and is located within the interior space.The luminaire comprises an extension element, an extension mounting body, and two extension side walls, which are arranged on one outer side of the mounting rail base and, together with the outer side of the mounting rail, enclose an extension interior. The extension mounting body and the extension side walls are fixed to the outside of the mounting rail by means of the extension element. Preferably, a further electrical functional module is fixed to the extension mounting body and arranged within the extension interior.

[0032] The various solutions according to the invention and their embodiments described herein may each have features that are explained here in connection with embodiments known from the prior art, in particular embodiments of the same type. Furthermore, the various solutions according to the invention and their embodiments may be combined in a particularly advantageous way, so that they may each have features that are explained here in connection with other solutions and their embodiments.

[0033] The invention is explained in more detail below with reference to twelve figures and exemplary embodiments.

[0034] They show: Figure 1: A schematic diagram of an embodiment of a generic luminaire; Figure 2: Various schematic diagrams of components of an embodiment of a system according to the invention; Figure 3: A schematic diagram of an embodiment of a luminaire according to the invention; Figure 4: Various schematic diagrams of views of an embodiment of an extension element of embodiments of a system according to the invention; Figure 5: A schematic diagram of a view of an end cap of an embodiment of a system according to the invention; Figure 6: A schematic diagram of a view of an extension side wall of an embodiment of a system according to the invention; Figure 7: A schematic diagram of a view of an extension mounting body of an embodiment of a system according to the invention;Figure 8: Various relative arrangements and different components of an embodiment of a system according to the invention are shown in various schematic diagrams; Figure 9: A schematic diagram shows a specific arrangement of components of an embodiment of the system according to the invention; Figure 10: A schematic diagram shows a specific arrangement of components of an embodiment of the system according to the invention; Figure 11: A schematic diagram shows a specific arrangement of components of an embodiment of the system according to the invention; Figure 12: A schematic diagram shows a specific arrangement of components of an embodiment of the system according to the invention.

[0035] In Figure 1In a schematic diagram illustrating the basic design of a generic elongated luminaire 100, an embodiment of such a luminaire 100 is shown in a highly simplified schematic form. Generally preferably, the system according to the invention can be configured such that its components can be arranged relative to one another in a first operating state, in which a [missing information] as in [missing information] Figure 1The illustrated luminaire is realized in two ways: first, in which the extension element, extension mounting body, and extension side walls are not used, and second, in which a luminaire according to the invention is configured comprising an extension element, extension mounting body, and extension side walls. A luminaire 100 of this type is elongated in the longitudinal direction X and has several support rails 1, 10 arranged one behind the other in the longitudinal direction X. The illustrated embodiment has a first support rail 1 and a second support rail 10. The support rails 1, 10 each have a U-shaped cross-section perpendicular to the longitudinal direction X, which defines an interior space within the support rail. Together with mounting bodies 6 arranged on their open end, also arranged one behind the other in the longitudinal direction X, they enclose an interior space of the luminaire 100 perpendicular to the longitudinal direction X.The various mounting bodies 6 can each have the same or different electrical functional elements. In the described embodiment, an LED module radiating downwards in the vertical direction Z is arranged outside the interior of each mounting body 6, and a control gear for supplying the LED module is arranged inside the interior, so that the LED module and the control gear are arranged on opposite vertical sides of the mounting body 6, which is generally advantageous according to the invention. A translucent cover 101 is also provided below each mounting body 6, through which the LED module can emit light downwards and which can have optically effective sections associated with the LED module for influencing the light distribution. A system according to the invention generally preferably comprises such covers 101.In further embodiments, additional mounting bodies 6 may be provided, which are designed as dummy modules and therefore do not carry any electrical functional element and serve only to close off the open side of one of the support rails 1,10.

[0036] In Figure 2 comprehensive the Figures 2a , 2b , 2c , 2d, 2e, 2f and 2g For illustrative purposes, various components of an embodiment of a system according to the invention are shown, which, for example, can be used to implement a luminaire 100 according to Figure 1 are suitable. The described embodiment comprises several support rails 1, 10, each having an identical cross-section. In Figure 2a The cross-section of a first support rail 1 and the common cross-section of the first support rail 1 and the coupling 2 arranged in its first longitudinal end section of the described embodiment are shown. From the illustrations according to Figure 2aIt is evident that the support rail 1 has a support rail base 11 and two support rail side walls 12 extending from the support rail base 11 along the vertical direction Z. Each of the support rail side walls 12 forms a U-shaped indentation 121 in cross-section at its upper end. It should be noted that the upper end region extends from the uppermost end of the support rail 1 preferably over at least 5% and, in particular, less than 50%, in particular between 5% and 40%, and in particular between 10% and 30% of the vertical extension length of the support rail 1, its upper end being defined by the uppermost end of the support rail 1. Each of the support rail side walls 12 also has a transverse support rail projection 13, which in this case is formed by the indentation 121.Furthermore, the support rail side walls 12 each have a support rail side wall section forming a U-shaped receptacle 122, the open side of which points along the vertical direction Z towards the support rail base 11, which is generally advantageous according to the invention. Preferably, the support rail side wall section forms a vertical end region of the respective support rail side wall 12, wherein the vertical end region preferably extends over a vertical extension length starting from the lowest vertical end of the support rail 1 over at least 5% and less than 50%, in particular between 5% and 40%, and in particular between 10% and 30% of the vertical extension length of the support rail 1. The U-shaped receptacle 122 forms part of the guide of the support rail 1, which is designed to receive the coupling 2, as shown in the corresponding cross-sectional view of [reference missing]. Figure 2aas shown. Furthermore, each support rail side wall 12, advantageously according to the invention, has a retaining projection 123, which is designed, for example, as a stop for a mounting body 6 and / or as a retaining projection 123 corresponding to a retaining spring provided on the mounting body 6, so that a mounting body 6 can be reliably fixed to the open side of the support rail 1 by means of the retaining projections 123, advantageously according to the invention. In the operating state, a coupling 2 of the described embodiment is arranged in a first longitudinal end section of the first support rail 1. The coupling 2 has a coupling body with a U-shaped cross-section, which has a coupling base 21 and two coupling side walls 22 extending away from the coupling base 21 along the vertical direction Z.The coupling side walls 22 each abut a lower end against a lower vertical guide section and an upper end against an upper vertical guide section of the guide formed by the support rail 1, wherein, in the described embodiment and generally according to the invention, the upper and lower vertical guide sections are advantageously formed by the support rail side walls 12 of the support rail 1. Furthermore, the coupling side walls 22 each abut at least one of their associated support rail side walls 12 from the inside with at least one vertical section along the transverse direction Y, so that the coupling 2 is fixed in its position relative to the support rail 1 by a positive locking mechanism in the operating state with respect to both the vertical direction Z and the transverse direction Y, which is generally advantageous according to the invention.According to the invention, the position of the coupling 2 relative to the support rail 1 can be advantageously fixed in general, firstly, by means of the transverse and vertical compression of the coupling 2 relative to the support rail 1, which provides a frictional connection, and secondly, by means of a scratch spring (not shown in the present figures) which is fixed to the coupling body and scratches against the support rail 1 from the inside with a spring section, thus further inhibiting relative movement between the support rail 1 and the coupling 2.

[0037] In the Figures 2b, 2c , 2d, 2e , 2f and 2g The transition during operation between two mounting rails 1,10 arranged one behind the other and fixed to each other during operation is explained by means of a representation of various components of the system in their respective positions during operation. Figure 2bA schematic view of a second longitudinal end of the second support rail 10 is shown, whereas in Figure 2c A view of a first longitudinal end of a first support rail 1 is shown, wherein a first longitudinal section already includes a coupling 2 of the system in a first longitudinal end section of the support rail 1. From the overall view of the Figures 2b and 2cIt is evident that a conductor rail 3 with channels open on one access side of the conductor rail 3 is arranged on the base 11 of the second support rail 10, with a conductor wire 4 being arranged in each of the channels, which is accessible from the access side of the conductor rail 3. The conductor rail 3 is fixed to the support rail 1 by means of retaining sections 31. An electrical connector 5 is fixed to the coupling 2, the first connection side of which is connected to the conductor wires 4 arranged in the conductor rail 3 of the first support rail 1 accordingly, as shown in Figure 2bwith reference to the conductor rail 3 and the second support rail 10. In a typical use according to the invention, the second support rail 10 and the first support rail 1 are connected to each other by moving the first support rail 1 towards the second support rail 10 along the longitudinal direction X, thereby engaging the second longitudinal section of the coupling 2, which is located in the Figure 2c As shown in the illustration, the coupling 2 extends along the longitudinal direction X from the first support rail 1 and is inserted into the guide of the second support rail 10. The first support rail 1 with the coupling 2 fixed to it and the second support rail 10 are moved towards each other with their longitudinal ends pointing towards each other until their longitudinal ends abut each other. Thus, advantageously according to the invention, the second longitudinal end of the second support rail 10, which is in Figure 2bAs shown, in the operating state, it is attached to the first longitudinal end of the support rail 1 or is only separated from it by a small gap. In the Figures 2d and 2e The electrical connector 5 is explained in more detail, with the illustration showing the following for better explanation. Figures 2d and 2e The coupling 2 is hidden so that the electrical connector 5 is more easily visible. The electrical connector 5 has an insulating plastic housing by means of which it is fixed to the coupling 2. Several connecting devices are provided in this plastic housing, arranged one behind the other in a line-up direction A, and each of their two longitudinal ends has a spring contact for receiving a conductor wire. Each spring contact comprises a base body and a spring element 51, the base bodies of the two spring contacts encompassed by a particular connecting device being each formed by a common body 52. ​​As shown from Figure 2gAs can be seen, in the operating state, the conductor wires 4 of the busbars 3, which are arranged in one of the first and second mounting rails 1 and 10 respectively, are electrically connected to each other by the base body 52 and the spring elements 51. Exactly one conductor wire 4, which is arranged in the busbar 3 located in the first mounting rail 1, is electrically connected to exactly one conductor wire 4, which is arranged in the busbar 3 located in the second mounting rail 10. For this purpose, a first spring element 51 provided at the first connection side of the electrical connector 5 presses a first conductor wire 4 of this pair against the body 52, and a second spring element 51, which is provided at the second connection side of the electrical connector 5, presses a second conductor wire 4 of the aforementioned pair against the body 52.Since the body 52 and preferably also the spring bodies 51 are electrically conductive, the two conducting wires 4 of the pair are thus electrically connected to each other. While in . Figure 2g Thus, the electrical connection of the conductor wires 4, which are arranged in the two mounting rails 1, 10 or are encompassed by the two lighting components, is shown in Figure 2f The corresponding arrangement of the conductor rails 3, which are arranged in the two mounting rails 1 and 10, and the electrical connector 5 with its connector housing, is shown in the operating state, specifically with a view of the rear side facing away from the access side of the conductor rail 3, which in the operating state faces the mounting rail base 11 of the mounting rails 1 and 10. The Figures 2d and 2eThe views shown of the first longitudinal end of the first mounting rail 1, in which various components of the system are not shown so that the longitudinal section of the connector 5 or its connector housing or its protruding spring contacts protruding from the first mounting rail 1 beyond its first longitudinal end, serve to illustrate that the second luminaire component, i.e. the second mounting rail 10 with the conductor rail 3 arranged therein with the conductor wires 4 arranged therein, can be easily pushed onto the first longitudinal end of the mounting rail 1 in the longitudinal direction X to achieve the operating state, such that the conductor wires 4 of the two luminaire components are electrically connected to each other in pairs by the electrical connector 5.

[0038] In Figure 3A schematic diagram shows an embodiment of a lamp 100 according to the invention. The lamp 100 according to the invention differs from the generic lamp 100 according to [reference to relevant document]. Figure 1 by having several extension elements, several extension mounting bodies, and several extension side walls 9 as well as end caps 8. In principle, by means of an embodiment of the system according to the invention, both the luminaire 100 according to Figure 1 as well as the light 100 according to Figure 3 feasible. For this purpose, the system has an additional end cap, which is not shown here, with which the longitudinal ends of the interior, as shown in the illustration according to Figure 1 which is still shown open, can be closed and have the first holding contours, which are subsequently shown with reference to the in Figure 3 The end cap shown in section 8 is explained, but it does not have an extension area, which is described below with reference to Figure 5 is explained in more detail. The in Figure 3 The illustrated luminaire 100 according to the invention has several extension mounting bodies, each of which is fixed relative to the mounting rail 1 by means of two extension elements, which is generally advantageous according to the invention. Figure 3 The extension mounting bodies are not shown, as they are each concealed by an extension cover 103, which is attached to the extension mounting body and held on the mounting rail 1 by means of the extension element. As shown in Figure 3As can be seen, the various extension mounting bodies are arranged one behind the other in the longitudinal direction X and spaced apart from each other. In an embodiment not shown, a further extension mounting body can be provided between each pair of extension bodies, which conceals the space between two adjacent extension mounting bodies. The various components of the system according to the invention, by means of which the in Figure 3 The following sections describe how the illustrated luminaire 100 can be realized, with reference to the Figures 4 to 12 explained in more detail.

[0039] In Figure 4 comprehensive the Figures 4a, 4b , 4c and 4d Various embodiments of an extension element 7 of an embodiment of a system according to the invention are schematically depicted in different schematic representations and views. Figures 4a and 4bFigure 1 shows a first embodiment of an extension element 7 of a first embodiment of the system. Figures 4c and 4d A second embodiment of an extension element 7 of a second embodiment of the system is shown. Figure 4a an oblique view from above shows Figure 4bA top view along the longitudinal direction X. The extension element 7 has a cross-section perpendicular to the longitudinal direction X in the form of an H-shape. The H-shape is formed by a transverse beam 701 and two vertical beams 702 connected by it. On the upper side of the transverse beam 701, a cable strain relief device 7011 is provided, advantageously in the present and according to the invention, in the form of a loop through which a cable arranged on the upper side of the transverse beam 701 or a holding device provided for holding a cable, such as a cable tie, can pass and whose clear cross-section runs along the longitudinal direction. The vertical beams 702 each have a lower vertical beam section 712, which has lower partial vertical beam sections spaced apart from one another along the longitudinal direction X, each forming a part of the locking device 71 of the extension element 7.In the exemplary embodiment according to the . Figures 4a and 4b Each vertical beam 702 has a lower vertical beam section 712, each of which has exactly two partial vertical beam sections spaced apart from each other in the longitudinal direction X and which together occupy less than 50% of the total longitudinal length of the extension element 7. This allows for a robust yet easy-to-assemble and disassemble locking device 71 to be provided with minimal material. This is further facilitated by the fact that the crossbeam 701 has a groove 7012 on its upper surface, which allows it to be elastically deformable despite the use of a robust material, thus ensuring easy assembly and disassembly. The locking device 71 allows the extension element 7 to be attached, as shown in particular in the following diagrams: Figure 8The extension element 7 is releasably locked to the support rail 1 in the operating state. The locking device 71 is formed by the lower vertical beam sections 712 and the crossbeam 701 of the extension element 7. At the lower end of each of the partial vertical beam sections, a locking projection 711 is provided, with which the vertical beams engage an undercut formed by each of the support rail side walls 12 in the operating state. This presses the crossbeam 701 vertically from above against the outside of the support rail base 11. Thus, the locking device is, advantageously according to the invention, arranged exclusively on the underside of the crossbeam 701 of the extension element 7. In addition to the locking device 71, the extension element 7 also has a fixing device 72.The fixing device 72 is, according to the invention, generally advantageously formed exclusively on the upper side of the crossbeam 701, in this case exclusively by a vertical beam section of the two vertical beams 702 arranged above the crossbeam 701. As shown in the figure below. Figure 8 As can be seen, in the operating state, the fixing device 72 encompasses the extension mounting body 600 on both sides, the extension mounting body 600 being held in place by the fixing device 72 and latched onto the extension element 7. Furthermore, the fixing device 72 provides a locking mechanism on each transverse side of the extension element 7, as shown in the diagram. Figure 8As can be seen, each extension side wall 9 is latched and fixed in place. The fixing device 72 has a first fixing unit for latching to the extension mounting body 600 and a second fixing unit for latching to the extension side walls 9, wherein the first fixing unit comprises a first group of sections 723, 725 of the extension element 7 and the second fixing unit comprises a second group of sections 721, 722, 724 of the extension element 7. The second fixing unit extends vertically beyond the first fixing unit. Each of the two fixing units has two side units spaced apart from each other in the transverse direction Y, each formed by one of the two vertical beams 702. In the Figures 4c and 4d In various schematic diagrams, a second embodiment of an extension element 7, or the extension element of a second embodiment of the system, is shown schematically. Figure 4can oblique view from above shows Figure 4d A slanted view from below. The ones in the Figures 4c and 4d The embodiment shown differs from the one described in the Figures 4a and 4b The embodiment shown differs, firstly, in that the crossbeam 701 has two grooves 7012 provided on the underside of the crossbeam 701, each running parallel and in the longitudinal direction X. Each of the two grooves 7012 is provided in a different transverse half of the extension element 7 and thus of the crossbeam 701, and is spaced apart from the transverse center of the extension element 7 or the crossbeam 701, respectively. The grooves 7012 ensure a particularly advantageous elastic deformability of the extension element 7, which allows the extension element 7 to be particularly advantageously placed on a support rail from above and locked into place therein. Secondly, a further difference between the embodiment according to the Figures 4a and 4band the embodiment according to the Figures 4c and 4d in that each of the vertical beams 702, with its respective lower vertical beam section 712, forms three partial vertical beam sections which are spaced apart from one another in the longitudinal direction X and which together occupy less than 70% of the total longitudinal length of the extension element 7. This ensures even better and at the same time particularly durable locking of the extension element 7 to the support rail 1. Preferably, the vertical beam sections 712 form the retaining arms or retaining arm sections of the locking device 71 described herein. Preferably, the retaining arms or all retaining arm sections of each retaining arm together extend over less than 70%, in particular less than 60%, in particular less than 50%, in particular less than 40% of the total longitudinal length of the extension element 7.

[0040] The functionality of the expansion element 7 and its effect in the operating state, in particular its interaction with other components of the system, is described below with reference to Figure 4 comprehensive the Figures 4a and 4b , Figure 5, Figure 6, Figure 7 and Figure 8 explained in more detail. As from Figure 6As can be seen, each extension side wall 9 has several sections 91, 92, 94 spaced apart from one another along the vertical direction Z, each of which is assigned to a corresponding section 721, 722, 724 of the second fixing unit of the extension element 7. Each of the two side units of the second fixing unit has such vertically spaced sections 721, 722, 724, each of which is assigned to one of the two extension side walls 9 and fixes them relative to the extension element 7 in the operating state. Each of the side units has a first section 724 onto which the extension side wall 9 with its first section 94 can be attached, ensuring that the extension side wall 9 can be rotated relative to the side unit about an axis that runs parallel to the longitudinal direction X.After the first sections 94, 724 are placed one on top of the other, the second sections 91, 721 of the extension side wall 9 and the side unit of the extension element 7 can be locked together by rotating them about the aforementioned axis. The second section 721 of the side unit engages behind the second section 91 of the extension side wall 9 along the transverse direction Y, the second section 721 of the side unit having two vertically spaced-apart locking projections 7211, 7212, between which the second section 91 of the extension side wall 9 is arranged in the operating state. Furthermore, the extension side wall 9 is supported by a third section 92, which is provided between the first section 94 and the second section 91, against a third section 722 of the side unit, which is arranged between the first section 724 and the second section 721 of the side unit.Thus, through the interaction of extension side wall 9 and second fixing unit of the fixing device 72, the extension side wall 9 is fixed in position on the extension element 7 in the operating state.

[0041] Out of Figure 5It is evident that the system further comprises an end cap 8, which has a first retaining contour 81 corresponding to a second retaining contour formed by each of the longitudinal end regions of the support rail 1. In the operating state, the first retaining contour 81 interacts with the second retaining contour of the support rail 1, thereby fixing the end cap 8 relative to the support rail 1. In the operating state, the first retaining contour 81 is completely located within the support rail 1. The end cap 8 also has an extension region 86, with which it extends vertically beyond the support rail base 11 in the operating state and closes one longitudinal end of the extension interior. The extension side walls 9 each have a fixing contour, and in the operating state, a first longitudinal section of the fixing contour engages behind a fixing section of the extension region 86 of the end cap 8.With the same fixing contour, but in a different longitudinal section of the fixing contour, the side walls engage behind the fixing device 72 of the extension element 7 in the operating state, in this case sections 722 and 724 of the fixing device 72. According to the invention, and generally advantageously, the fixing contour has the same cross-section perpendicular to the longitudinal direction X in the two longitudinal sections in which it engages behind the fixing device 72 on the one hand and the fixing section of the end cap 8 on the other. By engaging behind the end cap 8, the extension side walls 9 are fixed in their position along the transverse direction Y and along the vertical direction Z, both relative to the extension element 7 and relative to the end cap 8. As can be seen from the overall view of the... Figures 5, 6 and 8As can be seen, the extension side walls 9 with a lower section 95 also abut a lower section 85 of the extension area 86, and furthermore they abut the support rail side walls 12 within another longitudinal section of the lower section 95.

[0042] Out of Figure 7 The design of an extension mounting body 600 of an embodiment of the system according to the invention is evident. The extension mounting body 600 has a U-shaped cross-section perpendicular to the longitudinal direction X and is formed by a mounting body base 601 and two mounting body side walls 602. The, for example, in Figure 8 The mounting body 6 shown is identical in design to the extension mounting body 600. As shown Figure 8As can be seen, the extension mounting body 600 is held vertically clamped between sections 723 and 725 of the second fixing unit of the fixing device 72, and is transversely enclosed by the two side units of the second fixing unit. The mounting body 6, which is identical in design to the extension mounting body 600, is held relative to the support rail 1 by a retaining spring 61, which is fixed to the mounting body base 601. The support rail 1 can be deflected by means of an actuating element 610 to release the mounting body 6. Figure 8 It is further evident that, in the operating state, a control gear 60 for supplying an LED module is arranged in the interior and that a cover 101 is arranged on the underside of the mounting body 6. The control gear 60 can be supplied by a Figure 8A contact device (not shown), fixed to the base of the mounting body 6, engages with its contacts in the channels of a conductor rail 3 fixed to the mounting rail 1 within the interior of the mounting rail and contacts the conductor wires 4 arranged therein. An LED module is also arranged on the extension mounting body 600, which is concealed by an extension cover 103, closed at its longitudinal ends by a longitudinal cover 104. The LED module arranged on the extension mounting body 600 is supplied by a cable 700, which is guided in a cable clamp 73 formed by the extension element 7 and extends in the longitudinal direction X within the interior of the extension. As shown in the figure below. Figure 8As can be seen, the described system according to the invention comprises, in addition to the extension mounting body 600 designed as a carrier on which an LED module is arranged, an extension mounting body 102 designed as a pure plastic cover, which is also designed corresponding to the second fixing unit of the fixing device 72 and is held by it relative to the extension element 7 in the operating state. Thus, in the operating state, an extension mounting body 600 designed as a carrier and an extension mounting body 102 designed as a pure plastic cover can be arranged one behind the other in the longitudinal direction X.

[0043] In the Figures 9, 10 , 11 and 12Various views of components of an embodiment of a system according to the invention are shown, in which their relative positions to one another are represented schematically in a simplified manner. For explanatory purposes, different components of the system according to the invention are not shown in the respective views. Figures 9 and 10 The figures show a longitudinal section of an identical arrangement of components from each of two different transverse sides. The end cap 8 closes the longitudinal end of the mounting rail interior and the longitudinal end of the extension interior. Only one of the two extension side walls 9 is shown to allow a view into the extension interior. While a cover 101 is arranged on the underside of the mounting body 6, an extension cover 103 is arranged on the top side of the extension mounting body 600. Figure 11The schematic diagram shows the extension mounting body 600 in its position fixed to the extension element 7, to which an LED module 620 is attached. This LED module 620 is, in its operating state, protected by the Figure 11 The extension cover 103, not shown, is obscured. Figure 12 A clamp-like ceiling mounting element 800 is shown next to the extension element 7. In the arrangement according to Figure 12The extension element 7 secures the illustrated extension side wall 9, its locking device 71 engaging an undercut in the support rail side walls 12, which is formed by the indentations 121 in the support rail side walls 12. The ceiling mounting element 800 also engages this same undercut, which is generally advantageous according to the invention. The ceiling mounting element 800 has a mounting connection, which in this case is designed in the form of a hook, with which the ceiling mounting element 800 can be attached, for example, to a rope loop or eyelet, so that the Figure 12 The arrangement shown can be attached to a ceiling using the ceiling mounting element 800. Reference symbol list

[0044] 1 Mounting rail 2 Coupling 3 Conductor rail 4 Conductor wire 5 Electrical connector 6 Mounting body 7 Extension element 8 End cap 9 Extension side wall 10 Second mounting rail 11 Mounting rail base 12 Mounting rail side wall 13 Mounting rail projection 17 Feedthrough 21 Coupling base 22 Coupling side wall 31 Retaining section 51 Spring body 52 Body 60 Control gear 61 Retaining spring 71 Detent device 72 Fixing device 73 Cable clamp 81 First retaining contour 82 Section 84 Section 85 Section 86 Extension area 91 Section 92 Section 94 Section 95 Section 100 Luminaire 101 Cover 102 Extension mounting body 103 Extension cover 104 Longitudinal cover 121 Recess 122 U-shaped receptacle 123 Retaining projection 600 Extension mounting body 601 Mounting body bottom 602 Mounting body side panel 610 Actuator 620 LED module 700 Cable 701 Crossbeam 702 Vertical beam 711 Snap-in projection 712 Lower vertical beam section 721 Section 722 Section 723 Section 724 Section 725 Section 800 Ceiling mounting element7211Gap 7212Gap AArrangement direction XLanterior direction YTransverse direction ZVertical direction

Claims

1. System for implementing a luminaire (100) which is elongated in a longitudinal direction (X), the system comprising a support rail (1, 10) which is elongated in the longitudinal direction (X) and has a U-shaped cross section, which has a support rail base (11) which extends in a transverse direction (Y) between two support rail side walls (12) and an open side which lies opposite the support rail base (11) in a vertical direction (Z), wherein the support rail side walls (12) extend away from the support rail base (11) in the vertical direction (Z), the system furthermore comprising a mounting body (6) which, in an operating state of the system, is arranged on the open side of the support rail (1, 10) and is fixed to the support rail (1, 10) and, together with the support rail (1, 10), encloses an interior space which is provided for receiving electrical components, characterized in that the system comprises at least one extension element (7), at least one extension mounting body (102, 600) which is elongated in the longitudinal direction (X) and at least two extension side walls (9) which are elongated in the longitudinal direction (X), wherein, in the operating state, the extension element (7) is arranged on an outer side of the support rail base (11), which outer side points away from the interior space, and is fixed to the support rail (1, 10), in particular releasably fixed without tools, and the extension mounting body (102, 600) and the extension side walls (9) are fixed to the support rail (1, 10), in particular releasably fixed without tools, by means of the extension element (7), wherein the extension mounting body (102, 600) runs vertically at a distance from the support rail base (11) and the extension side walls (9) are arranged in each case on a transverse side of the extension mounting body (102, 600) and, together with the extension mounting body (102, 600) and the outer side of the support rail (1, 10), enclose an extension interior space which is provided for receiving electrical extension components.

2. System according to Claim 1, characterized in that the extension element (7) has a latching device (71), by means of which it is held in a releasably latched manner on the support rail (1, 10) in the operating state, wherein, in particular, the support rail (1, 10) has in each case an undercut on each of its support rail side walls (12), which undercut is engaged behind by the latching device (71) in the operating state, wherein, in particular, the latching device (71) has two latching arms which are each assigned to one of the support rail side walls (12) and are designed for latching with the support rail side wall (12) which is assigned to them or with a section of the support rail base (11) which adjoins said support rail side wall, wherein, in particular, the latching arms have in each case a plurality of latching arm sections which are spaced apart from one another along the longitudinal direction (X), wherein, in particular, the two latching arms are connected to one another by a cross beam (701), which runs along the transverse direction (Y), of the extension element (7), which transverse beam has, in particular, at least one groove (7012) which runs along the longitudinal direction for ensuring spring elasticity and / or a cable strain relief device (7011) which is accessible from its upper side.

3. System according to one of the preceding claims, characterized in that the extension element (7) has a fixing device (72), by means of which the extension mounting body (102, 600) and the extension side walls (9) are held in a latched manner on the extension element (7) in the operating state, wherein, in particular, the extension element (7), in particular the fixing device (72), engages transversely around the extension mounting body (102, 600) on both sides in the operating state.

4. System according to Claim 3, characterized in that the fixing device (72) has a first fixing unit for latching to the extension mounting body (102, 600) and a second fixing unit for latching to the extension side walls (9), wherein, in particular, both fixing units comprise in each case side units which are spaced apart from one another in the transverse direction (Y), wherein, in particular, the second fixing unit extends outside the first fixing unit, in particular extends vertically further away from the outer side of the support rail base (11) than the first fixing unit, and / or one of the fixing units, in particular the second fixing unit, forms with each of its side units a section of a transverse outer side of the extension element (7), and, in particular, the other of the two fixing units, in particular the first fixing unit, forms a section of a transverse inner side of the extension element (7).

5. System according to Claim 4, characterized in that the second fixing unit comprises two side units which are spaced apart from one another in the transverse direction (Y) and which are in each case assigned to precisely one of the two extension side walls (9), wherein each of the side units comprises at least two sections (721, 722, 724) which are spaced apart from one another vertically by at least 20% of a vertical overall extent length of the extension side wall (9) assigned to it and which, in the operating state, engage behind a section (91, 92, 94) of the extension side wall (9) which is assigned to them in each case in order to fix the respectively assigned extension side wall (9), wherein, in particular, a first section (94) of the respectively assigned extension side wall (9) can be fitted vertically onto a first section (724) of the respective side unit and subsequently a second section (91) of the respectively assigned extension side wall (9) can be fitted transversely onto a second section (721) of the respective side unit engaging behind the latter in a latching manner.

6. System according to one of the preceding claims, characterized in that the extension element (7) has a cross section perpendicular to the longitudinal direction (X) in the manner of an H shape which has a cross beam running in the transverse direction (Y) and two vertical beams connected by the latter, wherein, in the operating state, the cross beam (701) is pressed vertically against the outer side of the support rail base (11).

7. System according to one of the preceding claims, characterized in that the extension side walls (9) are of identical design, in particular are produced from metal, in particular by means of an extrusion method or a bending method, and / or in that the extension element (7) is designed as a plastic injection-moulded component, and / or in that the extension element (7) with extension mounting body (102, 600) mounted thereon and / or extension side walls (9) mounted thereon can be placed onto the support rail base (11) from the outside and can be fixed on the support rail (1, 10).

8. System according to one of the preceding claims, characterized in that the mounting body (6), in the operating state, is fixed relative to the support rail (1, 10) by means of a holding spring (61) which is fixed to the mounting body (6) or is integrated in the mounting body (6) and engages behind a holding projection (123), which is formed by the latter, on an inner side of each support rail side wall (12), and can be released from the support rail (1, 10) starting from the operating state by means of deflection of the holding spring (61), and in that the extension element (7) engages behind the extension mounting body (102, 600) in the operating state and, starting from the operating state, can be released from the latter by means of deflection of the extension element (7), wherein, in particular, the mounting body (6) and the extension mounting body (102, 600) have in each case a U-shaped cross section with a mounting body base (601) which extends in the transverse direction (Y) between two mounting body side walls (602) and with an open side which lies opposite the mounting body base (601) in the vertical direction (Z), wherein, in the operating state, the mounting body (6) closes the open side of the support rail (1, 10) with its mounting body base (601) and its mounting body side walls (602) run vertically towards the inner side of the support rail base (11) starting from its mounting body base (601) and the extension mounting body (102, 600) is spaced apart from the support rail base (11) with its mounting body base (601) and its mounting body side walls (602) run vertically towards the outer side of the support rail base (11) starting from its mounting body base (601), wherein, in particular, in an alternative operating state, the extension mounting body (102, 600) functions as a mounting body (6) and the mounting body (6) functions as an extension mounting body (102, 600).

9. System according to one of the preceding claims, characterized in that the system comprises at least two identically designed mounting bodies (6), of which a first mounting body (6), in the operating state, is arranged on the open side of the support rail (1, 10) and is fixed to the support rail (1, 10) and, together with the support rail (1, 10), encloses the interior space and of which a second, in the operating state, forms the extension mounting body (102, 600) and is fixed to the support rail (1, 10) by means of the extension element (7) and, together with the support rail (1, 10), encloses the extension interior space.

10. System according to one of the preceding claims, characterized in that the system has both a mounting body (6) designed as a pure plastic covering and a mounting body (6) designed as a carrier, to which an electrical contact device and at least one electrical functional element, in particular at least one LED module (620) and / or an operating device (60), which is conductively connected to the electrical contact device, are fixed, and / or in that the system has both an extension mounting body (102) designed as a pure plastic covering and an extension mounting body (600) designed as a carrier, to which an electrical extension contact device and at least one electrical extension functional element, in particular at least one LED module (620) and / or an operating device (60), which is conductively connected to the electrical extension contact device, are fixed.

11. System according to one of the preceding claims, characterized in that the system comprises at least one end cap (8), wherein the end cap (8) has a first holding contour (81) and each longitudinal end of the support rail (1) is formed by one respective longitudinal end region of the support rail (1) which has a second holding contour, wherein, in the operating state, the first holding contour (81) interacts with the second holding contour with fixing of the first and second holding contour with respect to one another, wherein the first holding contour (81) is arranged, in particular, at least partially within the cross section of the support rail (1), and wherein the end cap (8) closes a longitudinal end of the interior space, wherein the end cap (8) has an extension region (86) with which, in the operating state, it extends vertically beyond the support rail base (11) and closes a longitudinal end of the extension interior space.

12. System according to Claim 11 and furthermore at least according to Claim 3, characterized in that the extension side walls (9) in each case have a fixing contour, wherein, in the operating state, they engage behind a fixing section (82, 84) of the extension region (86) of the end cap (8) with a first longitudinal section of the fixing contour and engage behind the fixing device (72) of the extension element (7) with a second longitudinal section of the fixing contour, wherein, in particular, the fixing contour has an identical cross section perpendicular to the longitudinal direction (X) in the first and second longitudinal section and, in particular, a relative position of the respective extension side wall (9) relative to the extension element (7) or relative to the end cap (8) along the transverse direction (Y) and in particular along the vertical direction (Z) is fixed by the engagement behind.

13. System according to Claim 2 and in particular one of Claims 3 to 12, characterized in that the system comprises a clamp-like ceiling mounting element (800) which has two clamp legs which, in the operating state, engage behind the undercut of a respective different one of the support rail side walls (12) and which are connected to one another by a clamp base on which a mounting connection, which in particular comprises a hook or a screw connection, is provided, wherein the extension element (7) and the ceiling mounting element (800) are arranged in a respectively different longitudinal section and thus engage behind a respectively different section of the undercuts of the support rail side walls (12).

14. System according to one of the preceding claims, characterized in that the system has a current conductor rail (3) which is elongated in the longitudinal direction (X) and which, in the operating state, is arranged in the interior space and which has channels which are arranged next to one another in a line-up direction (A) running perpendicularly to the longitudinal direction (X), are elongated in the longitudinal direction (X) and are open on an access side of the current conductor rail (3), wherein in each channel at least one lead wire (4) which is elongated in the longitudinal direction (X) is arranged, and / or in that the extension element (7) has at least one cable clamp (73) which is designed to hold a round cable which, in the operating state, runs in the longitudinal direction (X) within the extension interior space in a clamped manner perpendicularly to the longitudinal direction (X).

15. System according to one of the preceding claims, characterized in that the system comprises a plurality of extension elements (7) which, in the operating state, are fixed to the support rail (1, 10) in a manner spaced apart from one another along the longitudinal direction (X) and which are fixed in each case to one and the same extension mounting body (102, 600) and to two and the same extension side walls (9).

16. Method for implementing a luminaire component which has a support rail (1, 10) which is elongated in a longitudinal direction (X) and has a U-shaped cross section, which has a support rail base (11) which extends in a transverse direction (Y) between two support rail side walls (12) and an open side which lies opposite the support rail base (11) in a vertical direction (Z), wherein a mounting body (6) can be arranged on the open side of the support rail (1, 10) in such a manner that, together with the support rail (1, 10), it encloses an interior space of the luminaire (100) perpendicularly to the longitudinal direction (X) and an electrical functional element which is arranged on the mounting body (6) is arranged within the interior space, characterized in that an extension element (7) is placed onto the support rail base (11) from the outside and is fixed to the support rail (1, 10) and, by means of the extension element (7), an extension mounting body (102, 600) and two extension side walls (9) are fixed to the outside of the support rail (1, 10) in such a manner that, together with an outer side of the support rail (1, 10), they enclose an extension interior space.

17. Luminaire (100), produced by means of a system according to one of Claims 1 to 15 and / or by means of the method according to Claim 16, wherein the luminaire (100) has a support rail (1, 10) which is elongated in a longitudinal direction (X) and has a U-shaped cross section, which has a support rail base (11) which extends in a transverse direction (Y) between two support rail side walls (12) and an open side which lies opposite the support rail base (11) in a vertical direction (Z), wherein the luminaire (100) comprises a mounting body (6) which is arranged on the open side of the support rail (1, 10) and, together with the support rail (1, 10), encloses an interior space of the luminaire (100) perpendicularly to the longitudinal direction (X), wherein an electrical functional element is arranged on the mounting body (6) within the interior space, wherein the luminaire (100) comprises an extension element (7), an extension mounting body (102, 600) and two extension side walls (9) which are arranged on an outer side of the support rail base (11) and, together with the outer side of the support rail (1, 10), enclose an extension interior space, wherein the extension mounting body (102, 600) and the extension side walls (9) are fixed to the outside of the support rail (1, 10) by means of the extension element (7).

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