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] Ma / wj February 27, 2025 Applicant: TRILUX GmbH & Co. KG 59759 Arnsberg Continuous line lighting with indirect component 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. Generic systems are designed to realize a generic luminaire that is elongated in a longitudinal direction and usually comprises several longitudinally elongated support rails. Typically, the support rails are used to fix the luminaire to a building structure, for example to a ceiling. The support rails represent a type of basic framework of the luminaire and are designed to accommodate supply lines and preferably to accommodate mounting bodies to which lamps or other electrical functional elements are attached. Thus, the support railsan infrastructure of the luminaire is provided. Electrical functional elements of the luminaire are usually attached to the mounting bodies, for example light sources, in particular comprising circuit boards with LEDs, radio modules, electrical cables and / or operating devices. When mounting the luminaire, the respective support rail is usually first attached to the structure 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 support rail, so that the support rail and mounting body enclose an interior space in which essential elements of the luminaire are arranged, for example circuit boards, operating devices, contact devices, etc. Typically, the support rail and mounting body are each elongated in a longitudinal direction, preferably the longitudinal extent is at least five times the extent perpendicular to the longitudinal direction. The support rail usually has aU-shaped cross-section perpendicular to the longitudinal direction, which extends in a vertical direction and in a transverse direction and is open at one vertical end and which is formed by a support rail base and two support rail side walls. The support rail side walls thus run vertically away from the support rail base, and the support rail base connects the transversely spaced support rail side walls, and opposite the support rail base, the support rail has an open side. Depending on requirements, the support rail base and support rail side walls can have contours or recesses or indentations. The support rail base and the support rail side walls usually together form a support rail interior that is at least partially enclosed by the support rail side walls and the support rail base. The support rail interior is thus defined by the support rail. Usually, all support rails of aSystem the features described here. A generic system often has at least a first and a second support rail, which are connected to one another at their mutually facing longitudinal ends to form the luminaire. They usually form a common interior space that extends elongated between the support rail side walls of both support rails and the support rail base of both support rails along the longitudinal extent of both elongated support rails. The two support rails are usually fixed to one another by means of a coupling, which has a U-shaped cross-section formed by a coupling base and two coupling side walls. The coupling side walls thus run vertically away from the coupling base, and the support rail base connects the transversely spaced-apart coupling side walls. The U-shaped cross section of the coupling is preferably 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, wherein the cross-section is preferably identical except for recesses and / or punchings in the support rail base and / or support rail side walls. Frequently, the cross-section of all support rails is substantially identical. Typically, the support rails are fixed relative to one another perpendicular to the longitudinal direction by the coupling and, in particular, also to one another in the longitudinal direction by means of the coupling. In an operating state of the system in which the first and second support rails are fixed to one another, the coupling is typically arranged in the two support rails in such a way that the coupling base runs along both support rail bases and each of the coupling side walls rests against a respective one of the support rail side walls assigned to it. Typically, the support rail is attached to the structure via its support rail base. The mounting body isusually arranged on the open side of the support rail, so that the mounting body vertically delimits the support rail interior defined by the support rail and the mounting body, together with the support rail on which it is arranged, 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 body can be interrupted, for example, to allow access to the interior space, for example for air supply. Preferably, the interior space is continuously enclosed over at least 80%, in particular at least 90% of its longitudinal extent, in particular over its longitudinal extent. The mounting body often has a cross-section perpendicular to the longitudinal direction, which has a mounting body base extending in the transverse direction and, on the two transverse sides of the mounting base, vertically extending away from the mounting body baseMounting body side walls. The mounting rail and mounting body are usually manufactured separately from one another. The mounting rail and / or mounting body are generally preferred and usually each manufactured from a sheet metal by forming. Typically, the mounting body is held in an operating state of the system in which the system is used as intended by means of a retaining spring on mounting rail retaining anchors of the mounting rail. Various possibilities for implementing such a retaining spring are known in the prior art. Typically, the retaining spring is firmly connected to the mounting body and has retaining projections that can be elastically deflected in the transverse direction, wherein the transverse direction, with reference to the mounting body, refers to the operating state of the system. Preferably, the mounting rail retaining anchors are designed as projections. To implement a generic luminaire, supply lines are usually provided which are located in the interiorthe support rails are arranged and are supplied by the lamps and / or other electrical functional elements that are arranged on the mounting bodies of the luminaire. A generic system generally preferably has a current conducting rail, which is usually made of plastic, in particular by means of an extrusion process or injection molding process, and which is also elongated in the longitudinal direction, i.e. has an elongated longitudinal extension between both of its longitudinal ends. The current conducting rail is usually arranged on an inner side of the support rail facing the interior and is fixed to the support rail, in particular to the support rail base and / or to at least one of the support rail side walls. The current conducting rail extends over a substantial portion of the length of the support rail, in particular over at least 80% of the longitudinal extension of the support rail. The current conducting rail usually has several along aThe busbars have channels arranged side by side in the direction of alignment, which are open to an access side that is accessible from the interior. In the operating state, the busbar is fixed to the support rail in such a way that the alignment direction runs perpendicular to the longitudinal direction. In one embodiment, the alignment direction runs parallel to the transverse direction in the operating state of the system. The channels preferably extend continuously over the entire length of the busbar. In particular, the transverse direction, the longitudinal direction and the vertical direction run perpendicular to one another. In at least some of the channels, at least one conducting wire is arranged, in particular exactly one conducting wire or exactly two conducting wires, which are held spaced apart from one another in the respective channel, and at at least one longitudinal end of the busbar, the conducting wires are usually connected to an external voltage source, via whichElectrical 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 support rails. For this purpose, an electrical connector is usually arranged at the longitudinal end, which is electrically connected to the conductor wires and via which the conductor wires are supplied with electrical energy, and / or a feed device is provided, which is arranged on an access side of the conductor rail pointing along the vertical direction or along the transverse direction and is connected to the conductor wires and which itself is or can be supplied with energy from an external energy source. Such a feed device often has a fastening device and feed contacts on a contact side, which correspond to an operating state or, in the case of a realized luminaire, for feeding energy into the conductor wires in at leastsome of the channels of the busbar and contact the respective conductor wire arranged therein. The feed contacts are usually arranged next to one another in the same alignment direction in which the conductor wires and the contacts of a contact device, which will be explained in more detail elsewhere, are arranged next to one another. Usually, an electrical connector is provided at each longitudinal end of the busbar. The electrical connectors can, for example, be designed as connectors that correspond to one another, for example a first one as a plug to a second one as a socket. By providing at least one connector at at least one longitudinal end of the busbar, adjacent busbars in the longitudinal direction can be electrically connected to one another, so that the conductor wires can form a through-wiring. In conventional embodiments, the system also often comprises a contact device via which aelectrical contact is established between the conductor wires assigned to 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 held in the operating state of the system or in its intended position on the support rail in which the luminaire is realized. The contact device is designed to engage in the channels from the access side of the support rail in order to contact the conductor wires. For this purpose, the contact device has several contact units arranged next to one another in an arrangement direction, wherein in the operating state of the system, each of the contact units is in electrically conductive contact with one of the conductor wires arranged in the channels of the busbar. In the operating state, the arrangement direction, which isThe contact units are arranged parallel to the alignment direction defined with reference to the contact device. For contacting the conductor wires, the contact unit is arranged with its contact side on the access side of the conductor rail, wherein the contact units for contacting the conductor wires are inserted into the channels along a plug-in direction defined for the contact unit resulting from the arrangement of the contact units, wherein the plug-in direction is usually perpendicular to the arrangement direction and, accordingly, for the realization of the operating state, perpendicular to the alignment direction. The contact units each have a contact with which they are in electrically conductive contact with one of the conductor wires in the operating state. Systems of this type are used in a wide range of applications, for example in warehouses, production halls, supermarkets or open-plan offices, whereinLuminaires with a plurality of support rails and mounting bodies are used. The basic principle of luminaires manufactured with a generic system is that the support rails form the electrical and mechanical infrastructure of these luminaires, whereas the mounting bodies are attached to the support rails and have the electrical functional elements required in the respective application area. Of course, at least some of the electrical functional elements are usually designed as lighting modules with light sources, in particular comprising LED boards. For example, alternatively or additionally, further electrical functional elements can also 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. In typical applications, genericSystems are used in such a way that several luminaire components, each of which comprises a support rail designed as explained, are arranged one behind the other in the longitudinal direction and connected to one another. Further components of the respective luminaire component can be arranged on or in the support rails of the luminaire components. For example, lamps and supply lines can be fastened to the support rails, for example directly to the support rails, for example by providing a mounting body designed as explained above and / or a current conducting rail designed as explained above. For example, each luminaire component can comprise a support rail, a current conducting rail and a mounting body and in particular a coupling fastened to the support rail. The luminaire components are arranged one behind the other in the longitudinal direction, wherein the support rails of the respective luminaire components are mechanically connected to one another by means of the coupling.and the supply lines that run in the support rails, in particular the conductor wires arranged in the current conducting rails of the luminaire components, are electrically connected to one another in pairs, i.e., one conductor wire of the first luminaire component with one conductor wire of the second luminaire component. This makes it possible to create very elongated luminaires, as is required in a variety of applications. In particular, the current conducting rails of two adjacent luminaire components, whose support rails are mechanically fixed to one another by a coupling, can be connected to one another by an electrical connector that connects the conductor wires arranged in the two current conducting rails in pairs. In particular, the current conducting rails and the electrical connector are fixed in their position relative to one another by determining the position of the support rails of the luminaire components relative to one another by means of the coupling.Thus, a luminaire of the respective system comprises a plurality of support rails and in particular a plurality of mounting bodies and / or current conducting rails or a plurality of luminaire components, which are each connected to one another as explained. Since generic luminaires usually have a considerable length in the longitudinal direction, often more than 5 m, often more than 10 m, often more than 20 m, often more than 50 m, it is necessary that a plurality of support rails are connected to one another in order to realize the luminaire using a generic system. For this purpose, the support rails are usually delivered with the coupling arranged at the factory with one longitudinal section in the respective support rail and with another longitudinal section protruding from the support rail, with which it is then inserted into another support rail to fix the two support rails to one another. For the installation of the electricalFunctional elements, in particular the lighting means, the contact devices are then arranged with their contact sides within the interior of the support rail on the access side of the current conducting rail, so that the functional element connected to the respective contact device can be electrically connected to at least some of the conductor wires by means of the contact device. Contacting of the conductor wires by the contact device is often carried out in such a way that a mounting body with a pre-mounted contact device is arranged at the open end of the support rail and the contact units of the contact device are inserted into the channels of the current conducting rail, while the contact device is fixed to the mounting body. The introduction of the contact units into the channels of the conductor wires often takes place during and due to the same movement of the mounting body relative to the support rail with which the mounting body is used to close the openSide of the support rail is arranged at the open end of the support rail and fastened to it. Since a current guide rail of a generic system typically has a large number of channels arranged next to one another in the direction of alignment, typically at least ten, preferably at least thirteen, ensuring correct contact between the conductor wires arranged in the channels is not easy. It must be taken into account that the current guide rail with all its channels usually extends in the direction of alignment over a limited area of ​​extension, so that the current guide rail and thus a luminaire manufactured using the system do not have to have excessive dimensions. In most cases, the current guide rail extends in the direction of alignment with its total extension length over less than 20 cm, in particular less than 15 cm. In most cases, the channel walls, which form the clear cross-sections of two adjacent channels of theConductor rails, have a channel wall thickness of less than 5 mm, 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 conductor rail so that their contact units can reach the channels provided for them. Furthermore, incorrect insertion of the contact device onto the conductor rail should be prevented if possible by positioning the contact device on the conductor rail rotated by 180° compared to its intended orientation relative to the conductor rail. It should be taken into account that usually each of the conductor wires arranged in the channels of the conductor rail is assigned a specific function, for example the function as a data conductor, neutral conductor, phase conductor or PE conductor, so that correct positioning of the contact device relative to the conductor rail or aCorrect contacting of the contact units on the respective wires provided for them is necessary for the correct functioning of a luminaire and also in terms of safety aspects. Due to the basic structure of a generic system, very elongated luminaire structures can be realized in an advantageous manner and at low cost. Due to the U-shaped cross-section of the support rails, such luminaires are initially only designed for direct lighting. For this purpose, mounting bodies are usually provided on the open side of the support rails, to which LED lighting modules are fixed, which are designed to emit light away from the interior of the support rail and thus downwards. For the realization of wide-beam luminaires or even luminaires that at least partially also provide indirect lighting, i.e. which not only provide indirect lighting in the half-space arranged below the light sources, but also light forTo radiate indirect lighting into the half-space arranged above the light sources, so that the light is only radiated downwards after reflection, usually by a ceiling, light-directing elements are usually used on the underside of the mounting body, for example TER optics and / or prism-equipped covers, so that at least a certain proportion of the radiated light is radiated with a wide beam angle or even with a directional component upwards. However, such optical systems are, on the one hand, expensive to implement and, on the other hand, can only provide indirect lighting to a limited extent without projecting significantly laterally beyond the support rail, thus leading to an undesirable design. Generic systems are therefore limited in the variability of their use. In addition to the problem of being able to meet the requirement of also providing indirect lighting, thisThe lack of variability is also disadvantageous in many other respects. Because the cross-section of the support rails is usually kept as filigree and thus small as possible, and the support rails and the connection concept between the support rails are tailored to this cross-section, the support rails, which serve as infrastructure, can only accommodate a limited number of components. In order to provide lighting installations that meet different levels of complexity, it is therefore necessary to provide systems with support rails with different cross-sections. However, this entails considerable effort. The present invention is based on the object of providing a system for realizing a luminaire that is elongated in a longitudinal direction, an elongated luminaire and / or a method for realizing a luminaire that is elongated in a longitudinal direction, which system or method eliminates at least one disadvantage of generic systems, luminaires and / orMethod at least partially resolves this. As a solution to the problem underlying the present invention, the invention proposes a system having the features according to claim 1. The system is designed for realizing a luminaire that is elongated in a longitudinal direction or for realizing a luminaire component that is elongated in a longitudinal direction. 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 that is arranged on the open side of the support rail in an operating state of the system and is fixed to the support rail and that, in the operating state, isSupport rail encloses an interior space intended for accommodating electrical components. The system can of course comprise a plurality of mounting bodies which, in the operating state, are arranged one behind the other in the longitudinal direction on the open side of the support rail and are fixed to the support rail. Accordingly, the system can of course comprise a plurality of support rails which, in the operating state, in particular for realizing an arrangement of lighting components, are arranged one behind the other in the longitudinal direction and are connected to one another by a coupling explained for generic systems. According to the invention, the system has at least one extension element, at least one extension mounting body elongated in the longitudinal direction and at least two extension side walls elongated in the longitudinal direction. In the operating state, the extension element is arranged on an outer side of the support rail base facing away from the interior space and is fixed to the support rail.fixed. In the operating state, the extension mounting body and the extension side walls are held relative to the support rail by means of the extension element in such a way that the extension mounting body runs vertically spaced from the outside of the support rail base and the extension side walls are arranged on a respective transverse side of the extension mounting body, so that the extension side walls, together with the extension body and the outside of the support rail, enclose an extension interior provided for receiving electrical extension components. The invention thus takes the special approach of forming an extension interior vertically above the support rail interior on the outside of the support rail, which is delimited on its upper side by the extension mounting body, on its transverse sides by one of the extension side walls in each case and on its underside by theThe extension element is particularly preferably designed to be fixed to the support rail without tools and / or detachable from the support rail without tools. By the extension element being able to be fixed to the support rail without tools or being detachable from the support rail without tools starting from the operating state, the extension interior can be provided in a particularly simple manner from the outside of the support rail. Generally preferably, the extension element is designed to be latchable to the support rail, preferably latchable by being placed on the outside of the support rail base along the vertical direction. The latching can take place, for example, on the outside of the support rail base itself or on an undercut of each of the support rail side walls. Generally preferably, the support rail side walls have, starting from the support rail base, forming aUndercut has a stepped contour, wherein the underside of the extension interior can be delimited in one embodiment by the outer side of the support rail base alone, in another embodiment by the outer side of the support rail base together with a stepped section of each support rail side wall. Generally preferably, the extension mounting body and / or the extension side walls are fixed to the extension element without tools and / or releasably without tools. Generally preferably, the extension mounting bodies and / or extension side walls are fixed to the support rail without tools by means of the extension element and / or releasably without tools, so that they can be fixed relative to the support rail without tools to achieve the operating state and / or can be detachable from the support rail without tools by means of the extension element. A tool-free connectionbetween the extension mounting body or extension side wall and the extension element can preferably be ensured by means of a latching mechanism. Generally preferably, the extension mounting body extends with its transverse extension length over at least 70%, in particular at least 80% of the transverse extension length of the support rail. Generally preferably, the extension side walls in the operating state rest with a lower end, in particular directly, on one of the support rail side walls. Generally preferably, the extension mounting body and the mounting body have the same transverse extension length. Generally preferably, the extension interior has a vertical extension length which is 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 the mounting body in the operating state and / or atransverse extension length which is 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 space. In one embodiment, the extension element has a latching device by means of which it is held releasably latched to the support rail in the operating state. The latching device is preferably provided in a lower vertical end section of the extension element which, starting from the lower vertical end of the extension element, extends upwards over less than 30%, in particular less than 20% of the total vertical extension length of the extension element. The directions “downward” and “upward” refer to opposite directions along the vertical direction in the operating state. In the operating state, the extension interior space is arranged above the interior space enclosed by the support rail and the mounting body, and theExtension mounting body arranged above the outer side of the support rail base. In one embodiment, the locking device has two locking arms, each assigned to one of the support rail side walls and designed to lock with the support rail side wall assigned to them or to lock with a section of the support rail base adjacent to the support rail side wall assigned to the respective locking arm. The two locking arms are thus spaced apart from one another in the transverse direction and engage two sections of the support rail spaced apart from one another in the transverse direction, either on one of the support rail side walls or on a section of the support rail base that is assigned to one of the support rail side walls and arranged adjacent thereto. The locking arms are thus preferably designed to each have a locking mechanism on a respectively assigned support rail side wall or on one of the assignedTo ensure a particularly reliable fixation of the extension element to the support rail side wall. By providing the two locking arms, which are spaced apart from one another in the transverse direction, a particularly reliable fixation of the extension element to the support rail can be ensured. Generally speaking, each of the locking arms preferably has a plurality of locking arm sections spaced apart from one another along the longitudinal direction. By providing spaced-apart locking arm sections, the locking arm sections can, on the one hand, be particularly easily locked to the support rail, and on the other hand, redundancy can be provided, since even if one of the locking arm sections breaks, the remaining locking arm sections of the respective holding arm can continue to ensure that the extension element is locked relative to the support rail. Preferably, each of the locking arms has at least two, in particular at least three, in particular exactly three, such locking arm sections.Preferably, each of the locking arm sections has a locking projection pointing along the transverse direction toward the transverse center of the extension element. Preferably, the two locking arms are connected to one another by a crossbar of the extension element running along the transverse direction. It is essential that the crossbar is designed to be continuous along the transverse direction so that it can reliably connect the two locking arms, which are spaced apart from one another in the transverse direction. The crossbar can be formed by a crossbar running continuously along the longitudinal and vertical directions or by several spaced-apart crossbar sections. Preferably, the crossbar has a greater extension length along the longitudinal direction than along the vertical direction; preferably, the extension length of the crossbar in the longitudinal direction is at least three times, in particular at least five times,in particular at least ten times its extension length in the vertical direction. Preferably, the crossbeam has a groove running along the longitudinal direction. Preferably, the groove extends over the entire extension of the crossbeam along the longitudinal direction. The groove can particularly advantageously provide a spring elasticity of the crossbeam, so that locking arms can be moved towards each other along the transverse direction under spring-elastic deformation of the crossbeam. This can particularly promote locking of the locking device to the support rail. Preferably, the crossbeam has the at least one groove on its underside. Preferably, the crossbeam has at least two grooves that are spaced apart from each other along the transverse direction and in particular run parallel to each other and in the longitudinal direction. Preferably, the crossbeam has a cable strain relief device accessible from its upper side. Preferably, theCable strain relief device designed in the manner of a loop that extends vertically upwards from the top of a section of the crossbeam that extends along the transverse direction. Generally, the cable strain relief device preferably has a clear cross-section through which a cable or, particularly preferably, a holding device for a cable, such as a cable tie, can be passed. Preferably, the clear cross-section of the cable strain relief device is circumferentially enclosed, so that, for example, such a holding 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, in particular, is spaced apart from each transverse end of the extension element by at least 20%, in particular at least 30%.in particular at least 40% of the total transverse extension length of the extension element. In one embodiment, the support rail side walls of the support rail each have, in an upper end region, an indentation with an indentation base forming a transverse end of the indentation and with at least one indentation side forming a vertical end of the indentation. Preferably, the indentation is U-shaped in cross-section, i.e. in the cross-section running perpendicular to the longitudinal direction, so that the indentation base is formed by the U-base and the indentation side is formed by one of the U-legs. Such an indentation can bring about improved stability of the support rail and / or can be used to fix, for example, a current conducting rail and / or the coupling and / or a mounting element. The indentation forms an undercut in the support rail side wall, which leads to a correspondingFixing of the current conducting rail or mounting element or coupling can be used. Generally preferably, the locking device has two locking arms, each of which forms at least a section of a transverse side of the extension element, wherein each of the locking arms is locked to a different one of the two support rail side walls in the operating state. Generally preferably, the extension element has the two locking arms in its lower end section. Generally preferably, the locking device engages around the support rail base in the operating state or is locked into 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 behind by the locking device in the operating state. The undercut is preferably formed on the outside of the respective support rail side wall, wherein the locking device engages transversely from the outside into the undercut.by the engagement of the locking device in the undercuts of the support rail side walls, a vertical contact pressure is generated, with which the extension element is pressed vertically from above against the outside of the support rail base. The undercut is preferably formed by the indentation explained. Preferably, the locking device engages exclusively with its two locking arms explained here in the undercut of the respective support rail side wall. Preferably, the extension element can be placed onto the support rail base from above, wherein during placement the locking arms slide along the respective associated support rail side wall and in the process an elastic deformation of the extension element takes place until the locking arms engage with their respective locking projections in the undercut of the respective support rail side wall and the extension element deforms back due to its spring elasticity. In one embodiment, theExtension element has a fixing device, by means of which the extension mounting body and the extension side walls are held locked to the extension element in the operating state. In one embodiment, the extension element, in particular the fixing device, encompasses the extension mounting body transversely on both sides in the operating state. The fixing device preferably comprises a plurality of spaced-apart fixing device components, wherein at least some of the fixing device components ensure locking 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 has a first fixing unit for locking to the extension mounting body and a second fixing unit for locking to theExtension side walls. Preferably, each of the fixing units can comprise at least some of the fixing device components explained. In one embodiment, the first fixing unit encompasses the extension mounting body transversely on both sides. In one 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 encompassing an element on both sides by another element in a specific direction, the element is arranged with two sections, which point away from each other in opposite directions along the specific direction, between two sections of the other element, which point towards each other along the specific direction, so that the position of one element along the specific direction relative to the other element is determined by the encompassing. Preferably, the mentioned sections of theone element and the said sections of the other element to one another, so that movement of the elements relative to one another along the said direction is prevented. In one embodiment, both fixing units each comprise side units that are spaced apart from one another in the transverse direction. Preferably, each of the side units of the second fixing unit is assigned to a different one of the extension side walls, so that each of the side units of the second fixing unit fixes the extension side wall assigned to it. 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. In one embodiment, the second fixing unit extends outside the first fixing unit. Preferably, the second fixing unit extends vertically further away from the outside of the support rail base than the first fixing unit.Thus, the second fixing unit preferably ends with its upper vertical end above the vertically upper end of the first fixing unit. This can particularly advantageously ensure that the extension side walls can each be held in an upper section by the second fixing unit and the extension mounting body can be concealed laterally by the extension side walls as far as possible. In one embodiment, one of the fixing units forms, with each of its side units, a section of a transverse outer side of the extension element. This can particularly advantageously ensure a simple and detachable fixation. Preferably, the second fixing unit forms, with each of its side units, a section of a transverse outer side of the extension element. The extension element has two transverse outer sides pointing away from one another along the transverse direction. Preferably, each of theSide units form a section of exactly one transverse outer side of the extension element assigned to it. In one embodiment, the other of the two fixing units forms a section of a transverse inner side of the extension element. The other of the two fixing units is preferably the first fixing unit. Each of the two side units of the other fixing unit preferably forms a section of exactly one inner side of the extension element assigned to it, the two inner sides facing each other along the transverse direction. In one embodiment, the second fixing unit has two side units spaced apart from one another in the transverse direction, each of which is assigned to exactly one of the two extension side walls, such that the respective side unit of the second fixing unit fixes the extension side wall assigned to it, without the other of the two side units contributing to this.In one embodiment, each of the side units has at least two sections that are vertically spaced from one another by at least 20% of the total vertical extension length of the extension side wall assigned to it, which sections, in the operating state, engage behind a respective section of the extension side wall assigned to them in order to fix the respective extension side wall. The sections of the extension side wall are thus spaced from one another along the vertical direction by at least 20% of the total vertical extension length of the extension side wall. By engaging behind vertically spaced sections, a particularly reliable fixation of the extension side wall can be ensured. Preferably, the sections are vertically spaced from one another by at least 30%, in particular at least 50%, in particular at least 60% of the total vertical extension length of the respective extension side wall.The vertically spaced-apart sections encompass the associated sections of the extension side wall along the vertical direction, or the associated sections of the extension side wall encompass the vertically spaced-apart sections of the side unit along the vertical direction. Preferably, the engagement between the section and the respective associated section ensures a positive fit along the transverse direction, so that the extension side wall can only be moved relative to the side unit along the transverse direction by releasing the engagement. In one embodiment, a first section of the respective associated extension side wall can be vertically plugged onto a first section of the respective side unit, and then a second section of the respective associated extension side wall can be plugged transversely onto a second section of the respective side unit, locking this second section of the side unit.can be plugged onto the first section of the side unit, ensuring engagement from behind. The first and second sections can be the vertically spaced sections explained. The first section of the extension side wall can be plugged vertically onto the first section of the side unit, ensuring engagement from behind along the transverse direction, so that the relative position of the first sections to one another is determined by plugging them along the transverse direction, and the second section of the extension side wall can be snapped onto the second section of the side unit, ensuring transverse engagement from behind. Preferably, the first section of the extension side wall can be plugged vertically onto the first section of the side unit, ensuring rotatability of the extension side wall relative to the side unit about an axis that runs parallel to the longitudinal direction, so that after plugging the first section of the extension side wall onto the firstSection of the side unit by twisting, the locking and thus engagement of the second sections can be realized. The explained sections are preferably each one of the explained fixing device components. In one embodiment, the extension element has a cross-section perpendicular to the longitudinal direction in the manner of an H-shape, which has a crossbar running in the transverse direction and two vertical bars connected by this. Preferably, in the operating state, the crossbar is pressed vertically against the outside of the support rail base. In one embodiment, the vertical bars form at least part of the locking device. In one embodiment, each of the vertical bars engages behind an undercut of the support rail side wall assigned to it. Generally, each of the vertical bars is preferably assigned exactly one of the two support rail side walls. Preferably, the vertical bars engage below theCrossbeam the support rail base, preferably also an upper end section of the two support rail side walls. Preferably, the vertical beams engage behind the two support rail side walls in the operating state below the crossbeam. 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 major 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, in particular with vertical beam sections running exclusively below the crossbeam, form the explained two locking arms of the locking device. InIn one embodiment, the crossbeam has at least one groove, in particular at least two grooves, in particular on its underside. In one embodiment, the vertical beam sections, in particular the explained lower vertical beam sections, each form one of the locking arms of the locking device, wherein they each form 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 one embodiment, the crossbeam has a strain relief device accessible from its upper side. The strain relief device can be designed as explained for the embodiments described here. In one embodiment, the extension side walls are identical. The extension side walls are preferably made of metal, in particular aluminum. InIn 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 over their longitudinal extent. Production by means of an extrusion or bending process can enable a particularly cost-effective realization of the extension side walls in such a way that they are designed to correspond to the fixing device over their longitudinal extent, 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 formed as a plastic injection-molded part. In one embodiment, the extension element with the extension mounting body mounted thereon can be placed from the outside onto the support rail base and fixed to the support rail.fixable. In one embodiment, the extension element with the extension side walls mounted thereon can be placed from the outside onto the support rail base and fixed to the support rail. In one embodiment, the extension element with the extension mounting body and the extension side walls mounted thereon can be placed from the outside onto the support rail base and fixed to the support rail. In the advantageous embodiments, the extension mounting bodies or extension side walls can thus be fixed to the extension element independently of the fixation of the extension element to the support rail, in particular releasably fixed, in particular fixed without tools, as explained here. The fixation of the extension mounting body or extension side walls relative to the extension element can thus take place independently of the fixation of the extension element to the support rail. Accordingly, the extension element cantaken alone to the support rail as explained and thus independent of whether extension mounting bodies or extension side walls have already been fixed to it beforehand. The described advantageous embodiments bring with them, on the one hand, a particularly high degree of modularity, and on the other hand, they enable a particularly simple realization of an extension interior during assembly, since the extension element, extension side walls and extension mounting body can be placed together as a coherent extension component from above onto the outside of the support rail and fixed to the support rail. In one embodiment, the mounting body is, in the operating state, by means of a retaining spring fixed to the mounting body or integrated in the mounting body, which engages behind a retaining projection formed by the respective support rail side wall on the inside of each support rail side wall, relative to theMounting rail fixed and releasable from the mounting rail starting from the operating state by deflecting the retaining spring. In one embodiment, the extension mounting body is engaged behind by the extension element in the operating state, in particular vertically and / or transversely encompassed on both sides, and starting from the operating state by deflecting the extension element, and can be released from the latter by deflecting the extension element. Thus, while in one embodiment the mounting body in the operating state has a deflectable retaining spring or such a deflectable retaining spring is fixed to the mounting body and by deflecting the retaining spring the fixing and releasing of the mounting body relative to the mounting rail is enabled, 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 mounting rail. In one embodiment, theThe mounting body and the extension mounting body each have a U-shaped cross-section with a mounting body base extending in the transverse direction 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, wherein its mounting body side walls extend vertically from its mounting body base to the inside of the support rail base. In the operating state, the extension mounting body with its mounting body base is vertically spaced from the support rail base, wherein its mounting body side walls extend vertically from the support rail base of the extension mounting body to the outside of the support rail base. Preferably, the mounting body side walls extend at least partially within the support rail interior in the operating state, whereas theMounting body side walls of the extension mounting body extend completely outside the support rail interior in the operating state. In one embodiment, the mounting body side walls in the operating state bear vertically against a respective retaining projection which is respectively assigned to them and which is formed by one of the two support rail side walls within the support rail interior. Preferably, the mounting body side walls are vertically spaced from the support rail base with their vertical ends facing the support rail base, wherein in particular the extension element has a cross-section perpendicular to the longitudinal direction in the manner of an H-shape and the crossbar runs vertically between the extension mounting body and the support rail base, wherein, of course, this is geared to the operating state. In one embodiment, the components of the system can be arranged in an alternative operating state, wherein in the alternative operating state of theThe extension mounting body functions as a mounting body and the mounting body functions as an extension mounting body, wherein the components of the system are arranged identically to one another 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 an extension mounting body and as a mounting body. In one embodiment, the extension mounting body and the mounting body are identically designed; in another embodiment, the extension mounting body and the mounting body differ, but are each suitable to function both as an extension mounting body and as a mounting body, so that both the operating state can be realized in which the mounting body is fixed to the open side of the support rail and the extension mounting body is arranged on the support rail by means of the extension element above the outside of the support rail base.is fixed, as well as for realizing 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. In one embodiment, the system comprises at least two identically designed mounting bodies, of which a first mounting body is arranged on the open side of the support rail in the operating state and is fixed to the support rail and, together with the support rail, encloses the interior space, and of which a second mounting body forms the extension mounting body in the operating state and is fixed to the support rail by means of the extension element and, together with the support rail, encloses the extension interior space. By means of the described particularly advantageous embodiments, the system can be provided with a high level of functionality in a particularly cost-effective manner and, in addition, the handling of theSystem can be particularly simplified. In one embodiment, the system comprises both a mounting body designed as a pure plastic cover and a mounting body designed as a carrier, to which an electrical contact device and at least one electrical functional element, in particular at least one LED module and / or an operating device that is conductively connected to the electrical contact device, are fixed. The mounting body designed as a pure plastic cover serves, in the operating state, only to close the open side of the support rail, which can be advantageous both for the visual appearance and for protecting the interior. Generally, in the operating state, several mounting bodies are fixedly arranged on the open side of the support rail as explained, so that they enclose the interior together with the support rail, wherein some of the mounting bodies are designed as a plastic cover and othersthe mounting body is designed as a carrier to which the contact device and functional element are fixed, wherein 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 a plurality of support rails and a plurality of mounting bodies, wherein in the operating state the support rails are arranged one behind the other along the longitudinal direction and fixed to one another and the various mounting bodies are arranged one behind the other in the longitudinal direction on the support rails, so that together with the support rails they enclose the interior space. In one embodiment, the system has both an extension mounting body designed as a pure plastic cover and an extension mounting body 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 and / or aOperating device, which is 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 or functional element or differently from them. For example, the contact device of the mounting body can be designed, as explained for generic systems, to engage with its contacts in the channels of a current conducting rail arranged in the support rail, electrically contacting the conductor wires arranged therein, whereas the extension contact device merely comprises a connection terminal or connection cable for connection to a connection terminal. The extension functional element can be, for example, an LED module and / or operating device, but in other embodiments also a functional element for extending the function of a luminaire, for example a light sensor.Motion detector, a camera and / or a WLAN module. 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 respective longitudinal end region of the support rail, which has a second retaining contour, wherein in the operating state, the first retaining contour cooperates with the second retaining contour to fix the first and second retaining contours to one another. By fixing the first and second retaining contours to one another, 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, in particular arranged completely within the cross section of the support rail. In one embodiment, the second retaining contour is formed at least predominantly by an inner side of the support rail. In the operating state, the end cap closes one longitudinal end of theInterior and thus the open end of the support rail provided at one longitudinal end of the support rail. Preferably, the end cap has an extension area with which it extends vertically beyond the support rail base in the operating state and closes one longitudinal end of the extension interior. In one embodiment, the system has two different end caps, both of which have a first holding contour as explained, which is designed to correspond to the second holding contour. Only one of the two end caps is suitable for implementing the operating state and has the explained extension area. The other of the end caps is suitable for implementing a function-reduced operating state by being arranged at one longitudinal end of the support rail and closing the longitudinal end of the interior, but not closing the extension interior at one longitudinal end. Such an end cap can advantageously be used for implementing such lighting devicesof the system in which no extension interior and thus no extension element, extension mounting body and extension side walls are provided. The other of the two different end caps, which comprises the extension area, is designed to implement the explained operating state. In one embodiment, the extension side walls each have a fixing contour, wherein in the operating state they engage behind a fixing section of the extension area of ​​the end cap with a first longitudinal section of the fixing contour and engage behind the fixing device of the extension element with a second longitudinal section of the fixing contour. In this particularly advantageous embodiment, the extension side walls are each fixed with their fixing contour to both the end cap and the extension element. The fixing contour preferably has an identical cross-section over its longitudinal extent. Thus, particularlyIn a simple manner, a particularly reliable fixing of the extension side walls, support rail and end cap to one another can be ensured. Generally preferably, the fixing contour in the first and second longitudinal sections has an identical cross-section perpendicular to the longitudinal direction. Generally preferably, by engaging behind the fixing contour, ie 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 along the transverse direction is determined, preferably furthermore a relative position of the respective extension side wall relative to the extension element or relative to the end cap along the vertical direction. In one embodiment, the system comprises a clamp-like ceiling mounting element which has two clamp legs which in theIn the operating state, they engage behind the undercut of a respective other of the support rail side walls and are connected to one another by a clamp base on which a mounting connection is provided. Each of the clamp legs is thus assigned to one of the support rail side walls and engages behind the undercut formed by this support rail side wall. The mounting connection can, for example, be designed in the manner of a hook or in the manner of a screw connection. The mounting connection enables simple 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 a screw bolt is attached, which is designed correspondingly to the screw connection. In a particularly advantageous embodiment, the support rail side walls each form an undercut, wherein both theThe clamp-like ceiling mounting element as well as the extension element, in the operating state, engage behind the undercut formed by the support rail side walls, ensuring the respective fastening. In one embodiment, the extension element and the ceiling mounting element are arranged in a respective different longitudinal section, so that they engage behind a respective different section of the undercuts of the support rail side walls. In one embodiment, the system comprises a longitudinally elongated current conducting rail, which is arranged in the interior in the operating state and which has channels arranged side by side in a row direction running perpendicular to the longitudinal direction, which are longitudinally elongated and open on an access side of the current conducting rail, wherein a longitudinally elongated conductor wire is arranged in each channel. Preferably, the row direction in the operating state runs along theTransverse direction. In one embodiment, the extension element has at least one cable clamp, which is designed to clamp a round cable, which in the operating state runs in the longitudinal direction within the extension interior, perpendicular to the longitudinal direction. The cable clamp can, for example, be designed in the manner of a slotted ring, which can encompass a round cable perpendicular to the longitudinal direction. This ring preferably has a diameter of at least 5 mm, in particular at least 10 mm. The cable clamp can ensure particularly simple fixing of a cable, which runs along the longitudinal direction within the extension interior. In the operating state, a functional element, which is arranged on the extension mounting body, is preferably connected to the cable. The cable preferably supplies the functional element. The functional element is preferably designed as an operating device, whichdesigned as an LED module, which in turn is supplied by the cable. In one embodiment, the cable runs without branches along a longitudinal extent of the extension mounting body, without being connected to a functional element. Thus, on the one hand, the cable clamp can be used to supply an extension of the functional element arranged on an extension mounting body in a particularly simple manner, and on the other hand, the cable clamp can ensure the simple fixing of a cable to the outside of the support rail base, regardless of the provision of functional elements on extension mounting bodies, whereby, when implementing a luminaire, the infrastructure provided by the support rails in a room can also be used to guide cables that are independent of the luminaire. In one embodiment, the system comprises several extension elements that, in the operating state, are spaced apart from one another along the longitudinal direction on theSupport rail and which are each fixed to a same supplementary 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 support rail by means of the plurality of extension elements. Preferably, the extension elements are each identically designed. Preferably, the system comprises a plurality of support rails which are arranged one behind the other along the longitudinal direction, wherein two adjacent support rails are fixed to one another by a coupling, wherein the plurality of extension elements are arranged distributed along the longitudinal direction over the two support rails and are each 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, are arranged along both support rails with respect to the longitudinal directionextend. The invention further relates to a method for realizing a luminaire component or for realizing a luminaire comprising such a luminaire component. The luminaire component has a support rail which is elongated in a longitudinal direction and has a U-shaped cross-section, which is designed as explained here. The support rail accordingly has an open side, wherein a mounting body which can be designed as explained here can be arranged on the open side of the support rail in such a way that, together with the support rail, it encloses an interior of the luminaire perpendicular to the longitudinal direction and an electrical functional element arranged on the mounting body is arranged within the interior. In one embodiment, the luminaire component comprises such a mounting body. In one embodiment, the luminaire component is designed such that a mounting body for jointly enclosing the interior with a support rail on the openside of the support rail encompassed by the luminaire component. According to the invention, an extension element is placed from the outside onto the support rail base and fixed to the support rail, and by means of the extension element, an extension mounting body and two extension side walls are fixed to the outside of the support rail in such a way that the extension mounting body and the extension side walls, together with an outer side of the support rail, enclose an extension interior. The method according to the invention can have further advantageous properties that are described in connection with embodiments of the system according to the invention. In particular, the method according to the invention can comprise that an end cap is fixed to a longitudinal end of the support rail and each of the extension side walls is fixed to both the extension element and the end cap. In particular, the method according to the invention can comprise the method stepthe extension element, extension mounting body and extension side walls are placed together from the outside onto the outside of the support rail base in one method 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 method step by fixing the extension mounting body and extension side walls to the extension element. Of course, generally preferably, the extension element, extension mounting body and extension side walls are each separately manufactured components. Generally preferably, the extension element is designed as a one-piece component. Generally preferably, each of the extension side walls is designed as a one-piece component. Generally preferably, the extension mounting body is designed as a one-piece component. Generally preferably, the support rail and / or theMounting body formed as a one-piece component. Generally preferably, the extension element is made of plastic, in particular formed as an injection-molded part. Generally preferably, the mounting body, the extension mounting body and the support rail are each produced from a sheet metal by forming. Generally preferably, the extension side walls are produced from metal by means of an extrusion process or an extrusion process. The invention further relates to a luminaire which is produced 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 produced by means of an embodiment of the method according to the invention, the luminaire comprises a luminaire component which is produced by means of the method and comprises at least one support rail, an extension element, an extension mounting body and two extension side walls. The luminaire comprises aMounting body, which is arranged on the open side of the support rail and, together with the support 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 arranged within the interior space. The luminaire has an extension element, an extension mounting body and two extension side walls, which are arranged on an outer side of the support rail base and, together with the outer side of the support rail, enclose an extension interior space, wherein the extension mounting body and the extension side walls are fixed to the outside of the support rail by means of the extension element. Preferably, a further electrical functional module is fixed to the extension mounting body and is arranged in the extension interior space. The various solutions according to the invention explained here and their embodiments can each have features which, in connection withState-of-the-art embodiments, in particular generic embodiments, are explained here. Furthermore, the various solutions according to the invention and their embodiments can be combined in a particularly advantageous manner, so that they can each have features that are explained here in connection with other solutions and their embodiments. The invention is explained in more detail below with reference to twelve figures using exemplary embodiments. They show: Figure 1: in a schematic principle representation, an embodiment of a generic luminaire; Figure 2: in various schematic principle representations, components of an embodiment of a system according to the invention; Figure 3: in a schematic principle representation, an embodiment of a luminaire according to the invention; Figure 4: in various schematic principle representations, views of an embodiment of an extension element ofEmbodiments of a system according to the invention; Figure 5: in a schematic principle representation, a view of an end cap of an embodiment of a system according to the invention; Figure 6: in a schematic principle representation, a view of an extension side wall of an embodiment of a system according to the invention; Figure 7: in a schematic principle representation, a view of an extension mounting body of an embodiment of a system according to the invention; Figure 8: in various schematic principle representations, various relative arrangements and various components of an embodiment of a system according to the invention; Figure 9: in a schematic principle representation, a view of a specific arrangement of components of an embodiment of the system according to the invention; Figure 10: in a schematic principle representation, a view of a specific arrangement of components of an embodiment of the system according to the invention; Figure 11: in aschematic principle diagram of a specific arrangement of components of an embodiment of the system according to the invention; Figure 12: in a schematic principle diagram of a specific arrangement of components of an embodiment of the system according to the invention. In Figure 1, an embodiment of such a luminaire 100 is shown in a highly simplified schematic diagram for the purpose of explaining the basic design of a generic elongated luminaire 100. Generally speaking, the system according to the invention can preferably be designed such that its components can be arranged relative to one another in a first operating state, in which a luminaire as shown in Figure 1 is realized, in which the extension element, extension mounting body and extension side walls are not used, and in a second operating state, in which a luminaire according to the invention comprising the extension element,Extension mounting body and extension side walls. A generic luminaire 100 is elongated in the longitudinal direction X and has a plurality of support rails 1, 10, which are 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 a support rail interior. Together with mounting bodies 6 arranged on their open side, which are also arranged one behind the other in the longitudinal direction X, they enclose an interior 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 on each of the mounting bodies 6 outside the interior, and aThe operating device for supplying the LED module is arranged within the interior space, so that the LED module and operating device are arranged on mutually opposite vertical sides of the mounting body 6, which is generally advantageous according to the invention. Furthermore, a translucent cover 101 is provided below each mounting body 6, through which the LED module can radiate light downwards and which can have optically effective sections assigned to the LED module to influence the light distribution. A system according to the invention generally preferably comprises such covers 101. In further embodiments, further mounting bodies 6 can be provided, which are designed as dummy modules and thus do not carry any electrical functional element and which serve only to close off the open side of one of the support rails 1, 10. In Figure 2, comprising Figures 2a, 2b, 2c, 2d, 2e, 2f and 2g, various components are shown for explanatory purposes.an embodiment of a system according to the invention, which is suitable, for example, for realizing a luminaire 100 according to Figure 1. The described embodiment comprises a plurality of support rails 1, 10, each having an identical cross-section. Figure 2a shows the cross-section of a first support rail 1 as well as 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. From the illustrations according to Figure 2a, it can be seen 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 in an upper end region. In general, it should be noted at this point that the upper end region, starting from the uppermost end of the support rail 1, preferably extends overat least 5% and in particular less than 50%, in particular between 5% and 40%, in particular between 10% and 30% of the vertical extension length of the support rail 1, wherein its upper end is defined by the uppermost end of the support rail 1. Each of the support rail side walls 12 further comprises a transverse support rail projection 13, which in the present case is formed by the indentation 121. Furthermore, the support rail side walls 12 each comprise a support rail side wall section which forms a U-shaped receptacle 122, the open side of which points towards the support rail base 11 along the vertical direction Z, which is generally advantageous according to the invention. Generally 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% andless than 50%, in particular between 5% and 40%, in particular between 10% and 30% of the vertical extension length of the support rail 1. The U-shaped receptacle 122 represents 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 Figure 2a. Furthermore, each support rail side wall 12, generally advantageous 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 by means of the retaining projections 123, a mounting body 6 can be reliably fixed to the open side of the support rail 1, generally advantageous 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. TheCoupling 2 has a coupling body with a U-shaped cross-section, which has a coupling base 21 and two coupling side walls 22 extending along the vertical direction Z away from the coupling base 21. The coupling side walls 22 each bear with a lower end against a lower vertical guide section and with an upper end against an upper vertical guide section of the guide formed by the support rail 1, wherein the upper and lower vertical guide sections in the described exemplary embodiment and generally according to the invention are each advantageously formed by the support rail side walls 12 of the support rail 1. Furthermore, the coupling side walls 22 each bear with at least a vertical section along the transverse direction Y from the inside against a respective one of the support rail side walls 12 assigned to them, so that the coupling 2 in the operating state both with respect to the vertical direction Z and with respect to theTransverse direction Y is fixed in its position relative to the support rail 1 by a positive connection, 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 generally advantageously ensured on the one hand by the transverse and vertical compression of the coupling 2 relative to the support rail 1, by which a frictional connection is provided, and on the other hand by a scraper spring (not shown in the present figures), which is fixed to the coupling body and scrapes 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. In Figures 2b, 2c, 2d, 2e, 2f and 2g, the transition in the operating state between two support rails 1, 10 arranged one behind the other and fixed to one another in the operating state is shown by means of the representation of various components of the system in their respective positions, which they have in theoperating state, is explained. Figure 2b schematically shows a view of a second longitudinal end of the second support rail 10, whereas Figure 2c shows a view of a first longitudinal end of a first support rail 1, wherein a first longitudinal section of a coupling 2 of the system is already arranged in a first longitudinal end section of the support rail 1. From the combination of Figures 2b and 2c, it can be seen that a current conducting rail 3 with channels open on an access side of the current conducting rail 3 is arranged on the support rail base 11 of the second support rail 10, wherein a conducting wire 4 is arranged in each of the channels, which is accessible from the access side of the current conducting rail 3. The current conducting rail 3 is fixed to the support rail 1 by means of holding sections 31. An electrical connector 5 is fixed to the coupling 2, which is connected with its first connection side to the conducting wires 4, which are arranged in theThe current conducting rail 3 of the first support rail 1 is arranged accordingly, as is explained in Figure 2b with reference to the current conducting rail 3 and the second support rail 10. The second support rail 10 and the first support rail 1 are connected to one another in a typical use according to the invention by moving the first support rail 1 along the longitudinal direction X towards the second support rail 10 and, in the process, the second longitudinal section of the coupling 2, which in the illustration shown in Figure 2c protrudes from the first support rail 1 along the longitudinal direction X, is inserted into the guide of the second support rail 10. The first support rail 1 with the coupling 2 fixed thereto and the second support rail 10 are moved towards one another with their mutually facing longitudinal ends until they abut one another with their longitudinal ends. Thus, generally advantageous according to the invention, the second longitudinal end of the second support rail 10, which is shown in Figure 2b, lies on thefirst longitudinal end of the support rail 1 or is only spaced from it by a small gap. The electrical connector 5 is explained in more detail in Figures 2d and 2e, wherein for better explanation in the illustration according to Figures 2d and 2e the coupling 2 is hidden so that the electrical connector 5 can be seen more clearly. The electrical connector 5 has an insulating plastic housing, by means of which it is fixed to the coupling 2. In this plastic housing, several connecting devices are provided, which are arranged one behind the other in a row direction A and at each of whose two longitudinal ends a spring contact is provided for receiving a respective conductor wire. Each spring contact comprises a base body and a spring body 51, wherein the base bodies of the two spring contacts encompassed by a specific connecting device are each formed by a common body 52. ​​As can be seen from Figure 2g, in theIn the operating state, the conductor wires 4 of the current conducting rails 3, which are arranged in one of the first and second support rails 1, 10, are electrically connected to one another by the base bodies or the body 52 and the spring bodies 51. In this case, exactly one conductor wire 4, which is arranged in the current conducting rail 3 arranged in the first support rail 1, is electrically connected to exactly one conductor wire 4, which is arranged in the current conducting rail 3 arranged in the second support rail 10. For this purpose, a first spring body 51 provided on the first connection side of the electrical connector 5 presses a first conductor wire 4 of this pair of conductor wires 4 against the body 52 and a second spring body 51, which is provided on the second connection side of the electrical connector 5, presses a second conductor wire 4 of the said pair of conductor wires 4 against the body 52. ​​Since the body 52 and preferably also the spring bodies 51are designed to be electrically conductive, the two lead wires 4 of the pair are thus electrically conductively connected to one another. While Figure 2g shows the electrical connection of the lead wires 4, which are arranged in the two support rails 1, 10 or are encompassed by the two luminaire components, Figure 2f shows the corresponding arrangement in the operating state of the current conducting rails 3, which are arranged in the two support rails 1, 10, and the electrical connector 5 with its connector housing, specifically with a view of the rear side facing away from the access side of the current conducting rail 3, which in the operating state points towards the support rail base 11 of the support rails 1, 10. The views of the first longitudinal end of the first support rail 1 shown in Figures 2d and 2e, in which various components of the system are not shown, so that the longitudinal section of the connector 5 orits connector housing or its protruding spring contacts can be seen, serve to illustrate that the second luminaire component, i.e. the second support rail 10 with the current conducting rail 3 arranged therein with the conductor wires 4 arranged therein, can be pushed onto the first longitudinal end of the support rail 1 in the longitudinal direction X in order to implement the operating state in a simple manner such that the conductor wires 4 of the two luminaire components are electrically conductively connected to one another in pairs by the electrical connector 5. Figure 3 shows a schematic diagram of an embodiment of a luminaire 100 according to the invention. The luminaire 100 according to the invention differs from the generic luminaire 100 according to Figure 1 in that it has several extension elements, several extension mounting bodies and several extension side walls 9 as well as end caps 8. Basically, by means ofan embodiment of the system according to the invention, both the luminaire 100 according to Figure 1 and the luminaire 100 according to Figure 3 can be realized. For this purpose, the system has a further end cap, which is not shown here, with which the longitudinal ends of the interior, which is still shown open in the illustration according to Figure 1, can be closed and which has first holding contours, which are explained below with reference to the end cap 8 shown in Figure 3, but do not have an extension area, which is explained in more detail below with reference to Figure 5. The luminaire 100 according to the invention shown in Figure 3 has several extension mounting bodies, wherein each of the extension mounting bodies is fixed relative to the support rail 1 by means of two extension elements, which is generally advantageous according to the invention. The extension mounting bodies are not shown in Figure 3, since they are each covered by an extension cover 103, which is attached to theExtension mounting bodies are each attached and held on the support rail 1 by means of the extension element. As can be seen from Figure 3, the various extension mounting bodies are arranged one behind the other in the longitudinal direction X and spaced apart from one another. In an embodiment not shown, a further extension mounting body can be provided between each two extension bodies, which covers the distance between two adjacent extension mounting bodies. The various components of the system according to the invention, by means of which the luminaire 100 shown in Figure 3 can be realized, are explained in more detail below with reference to Figures 4 to 12. In Figure 4, comprising Figures 4a, 4b, 4c and 4d, various embodiments of an extension element 7 of each embodiment of a system according to the invention are shown schematically in various basic representations in various views. In Figure4a and 4b show a first embodiment of an extension element 7 of a first embodiment of the system. Figures 4c and 4d show a second embodiment of an extension element 7 of a second embodiment of the system. While Figure 4a shows an oblique view from above, Figure 4b shows a plan view along the longitudinal direction X. The extension element 7 has a cross-section perpendicular to the longitudinal direction X in the manner of an H-shape. The H-shape is formed by a crossbar 701 and two vertical bars 702 connected by it. On the upper side of the crossbar 701, a cable strain relief device 7011 is provided, generally advantageous according to the invention, in the present case and generally advantageous according to the invention in the form of a loop through which a cable arranged on the upper side of the crossbar 701 or a holding device provided for holding a cable, such as a cable tie, can be passed and whose clear cross-sectionruns 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 of which forms a part of the locking device 71 of the extension element 7. In the exemplary embodiment according to 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 one another in the longitudinal direction X and which together occupy less than 50% of the total extension length of the extension element 7 in the longitudinal direction. As a result, a locking device 71 that is both robust and easy to install and remove can be provided with little material expenditure. This is particularly contributed to by the fact that the cross beam 701 has a groove 7012 on its upper side, whereby it can be elasticallyis deformable to ensure easy assembly and disassembly. By means of the locking device 71, the extension element 7, as can be seen in particular from Figure 8, is held 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 cross beam 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 each engage behind an undercut formed by each of the support rail side walls 12 in the operating state. As a result, the cross beam 701 is pressed vertically from above against the outside of the support rail base 11. The locking device is thus, generally advantageous according to the invention, arranged exclusively on the underside of the cross beam 701 of the extension element 7. In addition to the locking device 71, the extension element 7 further has a fixing device 72The fixing device 72 is, generally advantageously according to the invention, formed exclusively on the upper side of the crossbeam 701, in the present case exclusively by a vertical beam section of the two vertical beams 702 arranged above the crossbeam 701. As can be seen from Figure 8, in the operating state, the fixing device 72 encompasses the extension mounting body 600 on both sides, wherein the extension mounting body 600 is held in a locked manner on the extension element 7 by the fixing device 72. Furthermore, an extension side wall 9 is fixed in a locked manner on each transverse side of the extension element 7 by the fixing device 72, as can be seen from Figure 8. The fixing device 72 has a first fixing unit for locking with the extension mounting body 600 and a second fixing unit for locking with the extension side walls 9, wherein the first fixing unit comprises a first group of sections 723, 725 of the extension element 7and 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 one another in the transverse direction Y, which are each formed by one of the two vertical beams 702. Figures 4c and 4d schematically show various schematic diagrams of a second embodiment of an extension element 7 or the extension element of a second embodiment of the system. While Figure 4c shows an oblique view from above, Figure 4d shows an oblique view from below. The embodiment shown in Figures 4c and 4d differs from the embodiment shown in Figures 4a and 4b in that the cross beam 701 has two grooves 7012, which are provided on the underside of the cross beam 701 and are each parallel andrun 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 cross beam 701 and is spaced from the transverse center of the extension element 7 or the cross beam 701. The grooves 7012 can ensure a particularly advantageous elastic deformability of the extension element 7, by means of which the extension element 7 can be particularly advantageously placed from above on a support rail and locked thereto. Secondly, a further difference between the embodiment according to Figures 4a and 4b and the embodiment according to Figures 4c and 4d is that each of the vertical beams 702, with its respective lower vertical beam section 712, forms three partial vertical beam sections which are spaced from one another in the longitudinal direction X and which together take up less than 70% of the total extension length of the extension element 7 in the longitudinal direction.This ensures an even better and, at the same time, particularly durable latching of the extension element 7 to the support rail 1. Generally preferably, the vertical bar sections 712 form the retaining arms or retaining arm sections of the latching device 71 explained here. Generally preferably, the retaining arms or all retaining arm sections of each retaining arm extend together over less than 70%, in particular less than 60%, in particular less than 50%, in particular less than 40% of the total extension length of the extension element 7 in the longitudinal direction X. The functioning of the extension element 7 and its effect in the operating state, in particular its interaction with other components of the system, is explained in more detail below with reference to Figure 4, comprising Figures 4a and 4b, Figure 5, Figure 6, Figure 7 and Figure 8. As can be seen from Figure 6, each extension side wall 9 has several along theVertical direction Z spaced apart from one another sections 91, 92, 94, which are each 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 apart sections 721, 722, 724, which are each assigned to one of the two extension side walls 9 and fix this in the operating state relative to the extension element 7. Each of the side units has a first section 724, onto which the extension side wall 9 can be plugged with its first section 94, ensuring that the extension side wall 9 can be rotated relative to the side unit about an axis which runs parallel to the longitudinal direction X. After this fitting of the first sections 94, 724 onto each other, second sections 91, 721 of the extension side wall 9 and side unit of the extension element 7 can be rotated around the said axisare locked together. 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, wherein the second section 721 of the side unit has 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. The extension side wall 9 is further 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 the extension side wall 9 and the 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. Figure 5 shows that the system further comprises an end cap 8which has a first holding contour 81, which is formed correspondingly to a second holding contour formed by each of the longitudinal end regions of the support rail 1, wherein in the operating state, the first holding contour 81 interacts with the second holding contour of the support rail 1, whereby the end cap 8 is fixed relative to the support rail 1. The first holding contour 81 is arranged completely within the support rail 1 in the operating state. The end cap 8 further 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, wherein in the operating state they engage behind a fixing section of the extension region 86 of the end cap 8 with a first longitudinal section of the fixing contour. With the same fixing contour, but in a different longitudinal section of the fixing contour, theSide walls in the operating state, the fixing device 72 of the extension element 7, in this case the sections 722 and 724 of the fixing device 72. In this case, generally advantageous according to the invention, 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 respective sections, 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 combination of Figures 5, 6 and 8, the extension side walls 9 further abut with a lower section 95 against a lower section 85 of the extension region 86, wherein they also abut against the support rail side walls 12 within another longitudinal section of the lower section 95.Figure 7 shows the design of an extension mounting body 600 of an embodiment of the system according to the invention. 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 mounting body 6 shown, for example, in Figure 8 is identical to the extension mounting body 600. As can be seen from Figure 8, the extension mounting body 600 is held vertically clamped between the sections 723, 725 of the second fixing unit of the fixing device 72, wherein it is transversely enclosed by the two side units of the second fixing unit. The mounting body 6, however, which is identical 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, which is actuated by an actuating element 610 for releasing the mounting body.6 is deflectable. From Figure 8, it can also be seen that, in the operating state, an operating device 60 for supplying an LED module is arranged in the interior space, and that a cover 101 is arranged on the underside of the mounting body 6. The operating device 60 can be supplied by a contact device (not shown in Figure 8) which is fixed to the mounting body base of the mounting body 6, engaging with its contacts in the channels of a current conducting rail 3 fixed to the support rail 1 in the support rail interior space and contacting 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, which is 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 held guided in a cable clamp 73 formed by the extension element 7, andextends in the longitudinal direction X within the extension interior. As can be seen from Figure 8, 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 to correspond to the second fixing unit of the fixing device 72 and is held by the latter in the operating state relative to the extension element 7. 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. Figures 9, 10, 11 and 12 show various views of components of an embodiment of a system according to the invention, in which their relative position to one another is shown in a simplified schematic manner.For explanatory purposes, different components of the system according to the invention are not shown in the respective views. Figures 9 and 10 show a longitudinal section of the same arrangement of components, each from a different transverse side. The end cap 8 closes the longitudinal end of the support 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 11 shows a schematic principle representation of the extension mounting body 600 in its position fixed to the extension element 7, to which an LED module 620 is fixed. This LED module 620 is covered in the operating state by the extension cover 103 (not shown in Figure 11).concealed. In Figure 12, a clamp-like ceiling mounting element 800 is shown next to the extension element 7. In the arrangement according to Figure 12, the extension element 7 fixes the illustrated extension side wall 9, wherein its locking device 71 engages behind 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 behind 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 manner of a hook, with which the ceiling mounting element 800 can be fastened, for example, to a cable loop or eyelet, so that the arrangement shown in Figure 12 can be fastened to a ceiling by means of the ceiling mounting element 800.

[0002] Ma / wj 27 February 2025 Applicant: TRILUX GmbH & Co. KG 59759 Arnsberg Continuous luminaire with indirect component List of reference symbols 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 Lead-through 21 Coupling base 22 Coupling side wall 31 Holding section 51 Spring body 52 Body 60 Control gear 61 Retaining spring 71 Latching device 72 Fixing device 73 Cable clamp 81 First holding 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 base 602 Mounting body side wall 610 Actuator 620 LED module 700 Cable 701 Crossbar702 Vertical beam 711 Locking projection 712 Lower vertical beam section 721 Section 722 Section 723 Section 724 Section 725 Section 800 Ceiling mounting element 7211 Locking projection 7212 Locking projection A Alignment direction X Longitudinal direction Y Transverse direction Z Vertical direction

Claims

Ma / wj February 27, 2025 Applicant: TRILUX GmbH & Co. KG 59759 Arnsberg Continuous line light with indirect component Patent claims 1. System for realizing 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) extending in a transverse direction (Y) between two support rail side walls (12) and an open side 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 further 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 intended to accommodate electrical components,characterized in that the system comprises at least one extension element (7), at least one extension mounting body (102, 600) elongated in the longitudinal direction (X) and at least two extension side walls (9) 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) facing away from the interior 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) by means of the extension element (7), in particular releasably fixed without tools, wherein the extension mounting body (102, 600) extends vertically spaced from the support rail base (11) and the extension side walls (9) are each arranged on a transverse side of the extension mounting body (102, 600) and, together with the extension body and the outer side of the support rail (1, 10), enclose an extension interior provided for accommodating 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 detachably latched to the support rail (1, 10) in the operating state, wherein in particular the support rail (1, 10) has an undercut on each of its support rail side walls (12) which 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 to latch with the support rail side wall (12) assigned to them in each case or with a section of the support rail base (11) adjoining thereto, wherein in particular the latching arms each have a plurality of latches along the. Longitudinally spaced-apart locking arm sections, wherein in particular the two locking arms are connected to one another by a crossbar (701) of the extension element (7) running along the transverse direction (Y), which crossbar in particular has at least one groove (7012) running along the longitudinal direction to ensure spring elasticity and / or a cable strain relief device (7011) 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 locked to the extension element (7) in the operating state, wherein in particular the extension element (7), in particular the fixing device (72), engages transversely on both sides of the extension mounting body (102, 600) in the operating state.System according to claim 3, characterized in that the fixing device (72) has a first fixing unit for locking with the extension mounting body (102, 600) and a second fixing unit for locking with the extension side walls (9), wherein in particular both fixing units each comprise side units spaced apart from one another in the transverse direction (Y).

5. System according to claim 4, characterized in that. the second fixing unit extends outside the first fixing unit, in particular extends vertically further away from the outside of the support rail base (11) than the first fixing unit, and / or that 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).

6. System according to one of claims 4 or 5, characterized in that the second fixing unit comprises two side units spaced apart from one another in the transverse direction (Y), each of which is assigned to exactly one of the two extension side walls (9),wherein each of the side units comprises at least two sections (721, 722, 724) which are vertically spaced from one another by at least 20% of a total vertical extension length of the extension side wall (9) assigned to it, which sections, in the operating state, engage behind a section (91, 92, 94) of the extension side wall (9) assigned to them 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 vertically plugged onto a first section (724) of the respective side unit and then a second section (91) of the respectively assigned extension side wall (9) can be plugged transversely onto a second section (721) of the respective side unit, engaging behind said second section in a locking manner.

7. 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 crossbeam running in the transverse direction (Y) and two vertical beams connected by it, wherein, in the operating state, the crossbeam (701) is pressed vertically against the outer side of the support rail base (11).

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

10. System according to one of the preceding claims, characterized in that the mounting body (6) can be secured in the operating state by means of a retaining spring (61) which is fixed to the mounting body (6) or integrated into the mounting body (6) and which is arranged on an inner side. each support rail side wall (12) engages behind a retaining projection (123) formed by the latter, is fixed relative to the support rail (1, 10) and can be released from the support rail (1, 10) starting from the operating state by deflecting the retaining spring (61), and that the extension mounting body (102, 600) is engaged behind by the extension element (7) in the operating state and can be released from the extension element (7) starting from the operating state by deflecting the extension element (7), wherein in particular the mounting body (6) and the extension mounting body (102, 600) each have a U-shaped cross-section with a mounting body base (601) extending in the transverse direction (Y) between two mounting body side walls (602) and with an open side opposite the mounting body base (601) in the vertical direction (Z), wherein in the operating state the mounting body (6) with its mounting body base (601) the open side of the support rail (1,10) and its mounting body side walls (602) extend vertically from its mounting body base (601) to the inside of the support rail base (11), 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) extend vertically from its mounting body base (601) to the outside of the support rail base (11), 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).

11. 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) is arranged on the open side of the support rail (1, 10) in the operating state and is fixed to the support rail (1, 10) and encloses the interior space together with the support rail (1, 10), and of which a second mounting body forms the extension mounting body (102, 600) in the operating state and is fixed to the support rail (1, 10) by means of the extension element (7) and encloses the extension interior space together with the support rail (1, 10). 12.System according to one of the preceding claims, characterized in that the system comprises both a mounting body designed as a pure plastic cover and a mounting body 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) that is conductively connected to the electrical contact device, are fixed, and / or in that the system comprises both an extension mounting body (102) designed as a pure plastic cover 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) that is conductively connected to the electrical extension contact device, are fixed. 13.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 retaining contour (81) and each longitudinal end of the support rail (1) is formed by a respective longitudinal end region of the support rail (1) which has a second retaining contour, wherein in the operating state the first retaining contour (81) cooperates with the second retaining contour to fix the first and second retaining contours to one another, wherein the first retaining contour (81) is in particular arranged at least partially within the cross-section of the support rail (1), and wherein the end cap (8) closes one longitudinal end of the interior space, wherein the end cap (8) 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 space. 14.System according to claim 13 and furthermore at least according to claim 3, characterized in that the extension side walls (9) each 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 in the first and second longitudinal sections has an identical cross-section perpendicular to the longitudinal direction (X) and in particular by the engaging behind 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 determined.

15. System according to claim 2 and in particular one of claims 3 to 14, characterized in that the system comprises a clamp-like ceiling mounting element (800) having two clamp legs which, in the operating state, engage behind the undercut of a respective other 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 respective different longitudinal section and thus engage behind a respective different section of the undercuts of the support rail side walls (12).System according to one of the preceding claims, characterized in that the system has a current conducting rail (3) which is elongated in the longitudinal direction (X), which is arranged in the interior in the operating state and which has channels which are arranged next to one another in an array direction (A) running perpendicular to the longitudinal direction (X), are elongated in the longitudinal direction (X) and are open on an access side of the current conducting rail (3), wherein at least one conducting wire (4) which is elongated in the longitudinal direction (X) is arranged in each channel, and / or that the extension element (7) has at least one cable clamp (73) which is designed to... to hold a round cable running in the longitudinal direction (X) within the extension interior clamped perpendicular to the longitudinal direction (X).

17. 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) at a distance from one another along the longitudinal direction (X) and which are each fixed to a same extension mounting body (102, 600) and to two identical extension side walls (9).

18. Method for realizing a lighting component which has a support rail (1, 10) elongated in a longitudinal direction (X) with a U-shaped cross-section, which has a support rail base (11) extending in a transverse direction (Y) between two support rail side walls (12) and an open side opposite the support rail base (11) in a vertical direction (Z), wherein a mounting body (6) is attached to the open side of the support rail (1,10) can be arranged in such a way that, together with the support rail (1, 10), it encloses an interior of the luminaire (100) perpendicular to the longitudinal direction (X) and an electrical functional element arranged on the mounting body (6) is arranged within the interior, characterized in that an extension element (7) is placed from the outside onto the support rail base (811) and 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 attached to the outside of the support rail (1, 10), are fixed in such a way that, together with an outer side of the support rail (1, 10), they enclose an extension interior.

19. A luminaire (100) manufactured by means of a system according to one of claims 1 to 17 and / or by means of the method according to claim 18, 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) extending in a transverse direction (Y) between two support rail side walls (12) and an open side 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 of the luminaire (100) perpendicular 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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