EP4098938A1 - Optical system for a luminaire and luminaire comprising such a system - Google Patents

Abstract

The invention relates to an optical system for an elongate lamp (1), comprising an elongate reflector (2) comprising a support section (20) on which an arrangement of lamps is arranged and spaced apart from one another by the support section in the transverse direction (Y) and in the longitudinal direction (X ) running reflector side sections (22a, b), a first, elongated optical element (4), which closes the reflector (2) with a flat cover section (40), wherein the cover section (40) is spaced apart from one another in the transverse direction and runs in the longitudinal direction Side sections (41a, b) of the first optical element (4), to which the reflector (2) is attached, connect a second, elongated and flat optical element (6), which on the reflector side is attached to the cover section (40) of the first optical element ( 4) and in each case a head element (7) arranged on the longitudinal end side of the reflector (2) and fastened to it. The optical system according to the invention is characterized in that the second optical element (6) is supported on the first optical element (4) and that the respective head element (7) has an inner side section (72) on an associated end face (64) of the second optical element (6) and is designed and arranged, in the event of an operational change in length of the second optical element (6) in the longitudinal direction (X), its inner side section (72) rests without a gap on the associated end face (64) of the second optical element (6) by tracking the inside portion (72) to be maintained. The invention also relates to a lamp which includes such an optical system.

Description

The invention relates to an optical system for an elongate lamp, comprising an elongate reflector with a support section, on which an arrangement of lamps is arranged, as well as reflector side sections spaced apart from one another in the transverse direction and running in the longitudinal direction by the support section, a first, elongate optical element, which is provided with a flat Covering section closes off the reflector, with side sections of the first optical element which are spaced apart from one another in the transverse direction and running in the longitudinal direction, to which the reflector is attached, adjoin a second, elongated and flat optical element which, on the reflector side, is attached to the covering section of the first optical element is arranged, as well as a respective head element arranged on the longitudinal end side of the reflector and fastened to it.

Such optical systems are used for a variety of different lights, such as pendant lights or ceiling lights. As a light source, for example OLEDs or LEDs are used in the optical system or the respective lamp. By using optical systems with several optical elements next to the reflector, the light emitted by the lamp arrangement can be optimized, for example homogenized and subsequently or simultaneously directed to set predetermined, possibly complex, light distribution curves while maintaining predetermined and exact anti-glare properties of the optical system or the luminaire equipped with this optical system.

On the other hand, disadvantages are associated with the use of such a multi-part optical system, which can be caused by manufacturing tolerances of the components used and/or operational dimensional changes, for example by thermal expansion. This can cause gaps within the optical system, for example, so that light can be emitted at undesired sections of the optical system, which can result in the desired appearance of the luminaire and associated deviations from the luminaire's target light distribution curve. Conventional multi-part optical systems can therefore have complex geometries and in particular overlaps of optical components of the optical system in order to avoid such effects. However, these design measures are often very expensive to implement.

In this respect, the present invention is based on the object of developing a conventional optical system in such a way that normal manufacturing tolerances and, in particular, operational thermal expansion of the components of the optical system are tolerable, such that the optical properties of the optical system, in particular a predetermined Light distribution curve or function can be maintained over essentially all operating situations.

The above object is achieved by the present invention with an optical system having the features of claim 1. The optical system according to the invention for an elongated lamp comprises an elongated reflector, open in the light emission direction, with a support section on which an illuminant arrangement, in particular a plurality of OLEDs or LEDs , is arranged, as well as reflector side sections that are spaced apart from one another in the transverse direction and run in the longitudinal direction by the support section, a first, elongated optical element, which closes the reflector with a flat covering section or closes an opening of the reflector, with the covering section being spaced apart from one another in the transverse direction and adjoin side sections of the optical first element running in the longitudinal direction, to which the reflector is attached, in particular in such a way that the reflector is arranged on the inside of the covering device in the transverse direction, a second, Elongated and flat optical element, which is arranged on the reflector side, i.e. on the inside of the reflector, on the cover section of the first optical element and which can be set up for directing the light of the illuminant running in the direction of the cover section of the first optical element, as well as one longitudinal end side to the reflector arranged and in particular the reflector frontally closing and in particular attached to the reflector head element. The head element is preferably attached directly or indirectly to the reflector. The optical system according to the invention is characterized in that the second optical element in the longitudinal direction is supported or arranged in a floating, i.e. movable, manner on the first optical element, and that at least one of the head elements or the respective head element rests with an inner side section on an assigned end face of the second optical element in relation to its longitudinal extension and that at least one of the head elements or the respective head element is arranged and designed to maintain a gap-free contact of the associated end face of the second optical element on the associated inner side section by tracking the inner side section in the event of an operational change in length of the second optical element in the longitudinal direction.

The optical system according to the invention is based on the fundamental idea of compensating for production-related and/or operational dimensional changes of components within the multi-part optical system in that at least one of the two head elements is designed and arranged to automatically track a contact surface, here a contact surface, to the second optical element and in this way to avoid that viewing gaps can open up within the optical system due to manufacturing or operational reasons, which cause an undesirable appearance of the lamp or the optical system and/or an undesirable light distribution curve.

This inventive basic idea of the optical system according to the invention can be used particularly advantageously in an embodiment in which such a head element is arranged and fastened on both longitudinal end sides of the elongated reflector on the reflector and on the first optical element and both head elements with a respective inner side section on an associated end face of the second optical element and are designed and arranged, in the event of an operational change in length of the second optical element in the longitudinal direction, to maintain gap-free contact of the assigned end face of the second optical element on the assigned inner side section of the respective head element by tracking the side section. A change in length in the second optical element can be compensated for by the two head elements arranged at the longitudinal ends of the reflector in the manner of an automatic centering of the second optical element within the optical system according to the invention.

The first optical element can be designed, for example, as an optical cover for the optical system and thus, depending on the embodiment, as a cover for the associated elongated lamp. Depending on the embodiment, the second elongated and flat optical element, which is arranged, in particular rests on, the cover section of the first optical element, can be set up to guide the light of the illuminant running in the direction of the cover section of the first optical element. Depending on the embodiment, the cover section can have structured or unstructured, in particular planar, surfaces for guiding the light.

The specification of a direction as longitudinal or transverse direction can mean a direction that runs in the installed position of the components of the optical system according to the invention in the longitudinal direction of the reflector or in the transverse direction of the reflector.

Other features and developments of the invention Invention are given in the following general description, the figures, the description of the figures and the dependent claims.

It can expediently be provided that the tracking of the head element or the respective head elements is effected by elastic restoring forces, in particular elastic restoring forces in the head element. In this respect, it can be provided that the respective head element is designed to be elastic and the tracking of the head element or the inner side section is effected by generating or releasing elastic restoring forces in the head element. An operational expansion of the second optical element can lead to an elastic deflection of the head element or elements, which results in an elastic reaction force in the head element and which causes the head element or elements to avoid a reduction in the longitudinal extent of the second optical element corresponding column between the head element and the second optical element is tracked or be. In other words, depending on the operating situation, in this embodiment the second optical element can press an assigned end face against an assigned inner side section of the head element, thereby increasing elastic restoring forces in the head element. In contrast, the inner side section of the head element will follow an operational shrinkage of the second optical element, for example due to cooling, due to a release of elastic restoring forces, so that both an increase and a decrease in the extension of the second optical element in the longitudinal direction, a mutual contact of a Front side of the second optical element on an associated inner side section of a respective head element is maintained.

In order in particular to compensate for manufacturing tolerances of the components of the optical system according to the invention, it can expediently be provided that in the installed position in all operating situations the inner side section of the respective head element bears against the associated end face of the second optical element in the longitudinal direction with a force applied, i.e. a press fit between the head elements attached to the reflector and the second optical element is provided. The statement "all operating situations" can cover the entire operation or non-operation of an optical system according to the invention or a lamp assigned to it, i.e. starting from a situation with the lamp switched off at an ambient temperature that is in a predetermined range up to an operating situation with the lamp switched on and illuminant operated at rated power, at an ambient temperature within a specified temperature range. As already shown, such an application of force when the second optical element rests on the associated inner side section of the respective head element can be generated by an elastic reaction force in the head element, but according to the present invention also by an elastic reaction force in the reflector.

In order to provide a simple implementation of the tracking of the head element to the second optical element or to track the associated inner side section of the head element to the associated end face of the second optical element, it can expediently be provided that in the area of a contact section for connecting or contacting the first optical element and at least one of the head elements or both head elements is the Covering section of the first optical element extends in the longitudinal direction beyond the at least one head element or the head elements and that the respective head element rests against the covering section of the first optical element with a front edge subjected to a force. These structural designs ensure that the head element can be in contact with the first optical element even when the head element is deflected in the longitudinal direction by the second optical element in a direction perpendicular to the longitudinal direction and perpendicular to the transverse direction, in order to maintain the specified optical properties of the optical system to be maintained over all operating states. Provision can preferably be made to provide the application of force to the head element in the described direction perpendicular to the longitudinal direction and perpendicular to the transverse direction in that the respective head element is oversized and supported between the reflector and the second optical element. In particular, the respective head element and the reflector can be arranged in relation to one another in such a way that an elastic reaction force can be generated on the head element approximately perpendicularly to the first optical element.

In order to provide the described tracking of the head element or the inner side section of the head element to the associated end face of the second optical element, it can be provided that at least one, in particular both of the head elements, have a form-fit connection in a direction perpendicular to the longitudinal extension and perpendicular to the transverse extension (of the type described Plant an end face of the head element to the reflector-side surface (main surface) of the first optical element) to the first optical element and in the longitudinal direction a frictional connection has or have to the first optical element, so that in every operating situation a contact of the respective head element with the first optical element can be provided. The frictional connection between the first optical element and the head element can enable the head element to be displaced in the longitudinal direction relative to the first optical element, while it can be ensured, in particular by applying a force from the reflector to the respective head part in a direction perpendicular to the longitudinal axis and perpendicular to the transverse direction, that the respective head element rests with an associated end face on the first optical element.

It should be noted that embodiments can also be designed in which one of the, in particular both, head elements in a direction perpendicular to the longitudinal extension and perpendicular to the transverse extension do not have an end face of the respective head element in contact with the reflector-side surface of the first optical element, but rather a slight play. Associated with this, in these embodiments, an elastic deflection of the head element in the area of the first optical element, caused by a change in length of the second optical element, can be caused particularly easily, since no frictional connection between the head element and the first optical element has to be overcome and there is therefore no risk that the second optical element forms a wavy surface when stretched in length due to the clamping between the head elements. However, such play should preferably be comparatively small, since otherwise undesirable visual impressions can arise when looking at a luminaire equipped with an optical system according to the invention.

For simplified generation of the elastic restoring forces in the at least one or the respective head element, it can expediently be provided that this is designed to be easily elastically deformable in the longitudinal direction in the area of a tracking section, in particular in the area of said inner side section, in that its dimension in the longitudinal extension corresponds to the thickness of the head member reduced in length as compared to the length thereof adjacent the support portion of the reflector to facilitate longitudinal elastic deformation of the member.

According to the invention, different configurations can be implemented to connect the respective head element to the reflector. The provision of a plurality of snap-in connections spaced apart in a direction perpendicular to the longitudinal direction and perpendicular to the transverse direction, by means of which the respective head element can be fastened to the reflector, has proven to be a particularly expedient measure. These latching connections can be designed to act in the longitudinal direction, ie provide a form fit to prevent the respective head element from moving apart from the reflector in the longitudinal direction. These latching connections can preferably each have two latching elements associated with one another, for example a latching hook with a respective spring region and a latching projection arranged on the free end of the spring region as the first latching element, and a latching recess assigned to the latching projection of the latching hook and in particular designed to complement the latching projection, as the second latching element, preferably the latching hook with associated latching projection can be arranged on the head element and the latching recesses associated with the latching projections can be arranged on the reflector.

When designing the snap-in connections between the reflector and the respective head element, it can expediently be provided that the snap-in hooks are arranged alternately on the head element, e.g. in such a way that with two snap-in hooks arranged adjacent to one another, one of the snap-in hooks has the associated snap-in recess on the reflector on an outer surface and the other of the two Latching hook engages behind the associated latching recess on the reflector on an inner surface of the reflector. In this embodiment, the respective spring areas of the latching hooks can rest either on the outer surface or on the inner surface of the reflector, so that the latching hooks can provide the functionality of holding the contour of the generally U-shaped reflector in addition to fastening the head element to the reflector, for example around the reflector to save material comparatively thin. The contour holder of the reflector provided by the described arrangement of the head element to the reflector can also be used, for example, to use comparatively elongated reflectors and thus very elongated optical systems according to the invention, since the head elements maintain the specified contour of the reflector even with length dimensions of more than 1 m, for example be able. In principle, it can be provided that the latching hooks also provide contact surface sections in the region of the respective latching projections in order to enlarge the respective contact surface on the reflector, which rest on associated contact surfaces of the reflector in the installed position. These associated contact surfaces of the reflector can, for example, be such surfaces on the reflector that delimit the associated latching recess of the respective latching projection.

The described alternating arrangement of the locking hooks the respective end face of the reflector, in which the reflector is alternately gripped on its outside and inside by the latching hook or its respective spring area, can also be arranged and designed to press the head element onto the first optical element. For this purpose, the head element can be arranged between the reflector and the first optical element in a direction perpendicular to the longitudinal direction and perpendicular to the transverse direction in the manner of a press fit, with an elastic deflection of the reflector in this direction being able to provide the contact pressure as an elastic reaction force.

It can expediently be provided that at least some of the snap-in connections between the head element and reflector have different play between the snap-in hook or snap-in projection and the associated snap-in recess in the longitudinal direction, in particular depending on the distance between the snap-in connection and the supporting section of the reflector. In general, the statement "play in the longitudinal direction" in relation to the snap-in connections between the head element and reflector means an arrangement in which the respective snap-in recess and the respective snap-in projection are designed in such a way that after the snap-in connection this snap-in connection allows a (virtual) displacement of the head element and reflector in Longitudinally over a distance limited by the amount of play is possible, as far as only this locking connection is considered. In order to provide the described tracking of a respective head element to the second optical element, it can expediently be provided that at least one latching connection with a greater distance to the supporting section of the reflector than one or more latching connections which are arranged closer to the supporting section of the reflector has a larger longitudinal play in the longitudinal direction . This allows the longitudinal displacement of the respective Head element are provided in the area of contact with the second optical element, possibly with an increase or decrease in an elastic reaction force within the respective head element, ie under elastic deformation or under resolution or partial resolution of an elastic deformation of the head element. In one embodiment, it can be provided, for example, that a first plurality of latching connections, which are arranged closer to the carrying section of the reflector, than a second plurality of latching connections, which are at a greater distance from the carrying section of the reflector, have a longitudinal play in the range of approximately zero, while the latching connections of the second plurality have such a play that allows an elastic deflection of the head element in this section facing the first optical element. For example, it can be provided that the latching connections, starting from said inner side section of the head element, have a longitudinal play already described over the first third or half of an extension perpendicular to the longitudinal direction and perpendicular to the transverse direction, while the latching connections further away from the first optical element have a longitudinal play in the region of zero.

It can also be provided that the snap-in connections equipped with a longitudinal play are dispensed with entirely, so that the positive-locking fastening of the head element on the reflector in the longitudinal direction is achieved solely by the snap-in connections close to the carrying section of the reflector (i.e. by the, starting from the carrying section of the reflector, via the first two Third or half of an extension arranged perpendicular to the longitudinal direction and perpendicular to the transverse direction locking connections) is provided. It can also be provided be, as described, no snap-in connections to be provided in this section, but instead contact lugs in order to maintain a predetermined contour of the reflector in the area adjacent to the first or second optical element. The arrangement and design of these contact lugs can be identical to the latching hook described, with the exception that no latching projection is included. On the other hand, the latching connections between the head element and the reflector in the contact area with the first optical element have the advantage that they maintain the contour of the reflector, particularly during assembly work.

In order to guide the head element in the installed position relative to the first optical element in the longitudinal direction, it can expediently be provided that the head element has two lateral spring sections on its section facing the first optical element in the installed position, which are designed and configured to engage with a respective associated longitudinal groove on the first optical element. It can be provided that one of the groove walls of this longitudinal groove is provided by a lateral area of the cover section of the first optical element. With this design, the specified tongue-and-groove connection provides for a forced displacement of the head element in the longitudinal direction or an elastic deflection of the head element in the longitudinal direction in the region of the head element facing the covering section of the first optical element. Said longitudinal groove and a spring section of the head element accommodated by it can be designed in such a way that there is sufficient play between them to enable the desired elastic deflection of the head element in the longitudinal direction.

In principle, it can be provided that the respective head element is adapted to the cross section of the reflector. In particular, the reflector can have a trapezoidal cross section and the associated head element or elements can be adapted to it in a corresponding trapezoidal manner.

According to a large number of embodiments of the optical system according to the invention, the reflector can have a generally U-shaped cross section, it being possible for the reflector to have an opening. The shape of the reflector may include curved and/or straight sections in cross-section. For example, the cross-section of the reflector can be approximately semi-circular, approximately semi-elliptical or angular. With regard to an angular design, the generally U-shaped reflector can also be designed with a V-shape in cross section. In this respect, it should be noted that the statement "generally U-shaped reflector" is to be interpreted very broadly, in particular that the different shapes of the various embodiments of the reflector mentioned are to be subsumed under it.

In a particularly expedient embodiment, it can be provided that the elongated reflector has latching elements, in particular latching recesses, on the face side in the region of its side sections, which are connected to complementary latching elements, in particular latching hooks of the respective head element that extend in the longitudinal direction and can be deflected perpendicularly thereto, in order to provide a plurality of latching connections between Reflector and respective head element interact. In particular in the case of a reflector with a trapezoidal cross section and an associated trapezoidal head element, it can be provided that the respective latching connections on the side sections of the reflector have different play in the longitudinal direction with the assigned head element, so that a deformation of the respective head element, in particular in the form of a bending in the longitudinal direction, is provided in the event of a change in length of the second optical element for optimized tracking of the respective head element with respect to the assigned end face or end face of the second optical element.

Depending on the embodiment, the reflector can be attached to the first optical element in different ways. For example, the two elongate components of the optical system according to the invention can be aligned with one another and fastened to one another by means of a large number of fastening elements spaced apart in the longitudinal direction, for example latching elements. In a particularly expedient embodiment, it can be provided that the respective side sections of the first optical element have a groove running in the longitudinal direction on the inside for receiving a respective, assigned spring section arranged on one of the two side sections of the reflector, so that the connection of the two components via two in Longitudinally running and transversely spaced tongue and groove connections can be realized.

It can expediently be provided that the reflector is designed as a sheet metal element coated with a reflective layer, it being possible for it to have a tongue section on the respective free ends of the side sections for accommodation in the associated groove on the associated side section of the first optical element. In this case, the groove depth, ie the extent to which the reflector fits into the associated groove of the first optical element extends into it, be formed so large that manufacturing-related and/or operational-related changes in length of the reflector and/or the first optical element in the tongue and groove connection between the reflector and the first optical element do not result in the associated tongue section of the reflector being disengaged from the associated groove on the first optical element device.

In order to provide a particularly effective fixation of the reflector of the optical system designed according to the invention on the first optical element, it can be provided that the above-described tongue and groove connection is fixed by means for preventing a relative displacement of the reflector and the first optical element to one another in the longitudinal axis . For example, it can be provided that in the area of the tongue section of the reflector, cutouts and deformations of the cutout area are formed out of the surface plane to form claws, in which the cutout sections described, in particular spaced apart in the longitudinal direction, are located in assigned groove wall sections of the groove of the first optical element claw.

It can preferably be provided that the groove on the respective side section of the first optical element for receiving an associated tongue section of the reflector is provided by two flanges of the first optical element running inwards and in the longitudinal direction, which extend from an associated wall of the respective side section in the transverse direction extend inside.

For fastening the second optical element to the first optical element, in particular floating, ie movable in the longitudinal direction, it can expediently be provided that the second optical element is overlapped at its longitudinal edges by an associated retaining flange running in the transverse direction of a respective side section of the first optical element. The respective retaining flange can preferably also provide one of the groove walls for providing the groove for receiving the respective tongue section of the reflector. In this embodiment, the second optical element can be longitudinally aligned with the optical element and then inserted longitudinally therein.

Depending on the embodiment with regard to the optical functionality of the optical system, the second optical element can be designed differently. In principle, it can be provided that this second elongated and planar optical element is arranged and designed in such a way that it is designed to guide the light of the illuminant running in the direction of the covering section of the first optical element. In this respect, the second optical element can, for example, have a light guiding functionality through refraction properties, for example through the design of a microprism-structured surface of an optical disk. Additionally or instead, the second optical element can have such a light guiding functionality by light reflection. According to the invention, this second optical element can also have diffuser properties, in particular for homogenizing the light emitted by the illuminant.

In a particularly expedient embodiment, it can also be provided that the second optical element is designed as an optical element with an optically effective Sandwich structure, for example comprising at least one diffuser film or diffuser plate and an optical plate provided with a surface which is microprismatically structured at least in sections. Provision can preferably be made to provide the microprism structuring in the area of two transverse end sections which are spaced apart in the transverse direction and extend in the longitudinal direction, in particular to implement a predetermined anti-glare characteristic of the second optical element or the optical system according to the invention. Provision can be made for a central section extending in the longitudinal direction between the two microprism-structured surface sections to be unstructured, so that in this area the second optical element acts or is formed solely as an optical plate, in particular as a plane-parallel plate.

In order to achieve an attractive design of the optical system according to the invention, it can be provided that the side sections of the first optical element extend at an angle between 60° and 120°, in particular at an angle of approximately 90°, to the covering section of the first optical element.

In order to achieve a special appearance of the optical system according to the invention, it can be provided that the first optical element is designed as a coextrusion part in which the cover section is made of a transparent material such as PMMA or PC and the side sections are made of a diffuser material. Provision can be made for the diffuser material to comprise a mixture of a transparent material, in particular the material of the cover section, with the addition of polymer balls which relate to the transparent material differ on the refractive index. In this way, in the area of the side sections of the first optical element, a diffuser functionality can be provided for the light emitted by the illuminant without increased absorption of the light taking place in this section, since the diffuser properties of the material are not based on the absorption of light.

To avoid looking into the interior of the optical system according to the invention in certain operating situations of the system installed in a lamp, it can expediently be provided that the head elements are coated on the outside with a diffuser material and/or are made of a diffuser material. For example, the head element can in turn be made of PMMA or PC, into which polymer beads can be mixed with a different refractive index than the actual material.

To further improve light control within the optical system according to the invention, a further optical element can be provided, in particular an optical element designed as primary optics, which can be arranged directly or close to the illuminant (for example LEDs or OLEDs) of the illuminant arrangement. Such a third optical element can be provided, for example, to provide a collimator functionality for parallelizing the light emitted by the respective illuminant, which thus falls in a predetermined manner on the second and the first optical element and is deflected by them with particular accuracy to provide a predetermined light distribution function can.

In another embodiment it can also be provided that the third optical element is set up and arranged to provide a homogenization of the light emitted by the lamp arrangement in the transverse direction, for example in such a way that the second and the first optical element are illuminated homogeneously over their entire transverse and longitudinal extent, so that the optical elements have the desired Can generate light distribution curve.

For this purpose, the supporting portion of the reflector can comprise holding elements extending in the direction of the second optical element for holding such a third, elongate optical element. In another embodiment it can also be provided that this third optical element is differentiated in the longitudinal direction, i.e. in this embodiment several third optical elements arranged next to one another in the longitudinal direction can be provided.

In order to fasten the system according to the invention to a mounting body of a light, it can expediently be provided that the side sections of the first optical element have respective holding areas for engaging with associated holding areas of a mounting body of a light. These holding areas can represent, for example, a vertical undercut for a side section of an associated mounting body, so that the engaged side sections of the first optical element and an associated mounting body are designed to hold the optical system on the mounting body.

The invention also relates to a lamp, comprising an elongated, in particular open on a main side, which is designed to accommodate an optical system according to one of the above-described embodiments, wherein the mounting body has a fastening section for fastening the lamp to a component and two side sections extending approximately perpendicularly therefrom, the side sections each having a holding area for engaging with associated holding areas of the side sections of the first optical element of the optical system according to the invention for holding the optical system in the assembly body. Such a light can be designed, for example, as a ceiling light or pendant light. The shape of the mounting body can be adapted to the respective lighting problem. In a particularly expedient embodiment, the mounting body can be cuboid with the described fastening section and the two side sections which extend perpendicularly thereto and which can serve as fastening sections for the optical system according to the invention described above.

In particular, when a cuboid mounting body and a trapezoidal reflector are provided, a cavity of the luminaire can be realized between the reflector and the inner boundary surfaces of the mounting body, in which in particular electronic supply components, control components and/or sensors for operating the light source of the optical system can be arranged.

The invention also relates to a lighting module that includes an optical system according to the invention. The lighting module also includes a connection device which is electrically connected to the lighting arrangement of the optical system and is arranged on a side of the supporting section which is remote from the covering section. The lighting module is designed to be connected to an assembly unit. For example, the mounting unit can be designed as a mounting body as explained above or can comprise such a mounting body, with a lamp according to the invention as explained above being able to be realized by means of the connection of the lighting module to the mounting body. The mounting unit can in principle have the most varied configurations that are suitable depending on the area of application, it being possible to implement a lighting arrangement according to the invention, which is explained in more detail below, by connecting the lighting module to the mounting unit. The lighting module has the particular advantage that, thanks to its connection device, it can be used as a modular component that can be easily connected to supply lines provided in the assembly unit by means of the connection device to implement a light or light arrangement. For this purpose, the connecting device must be connected to the supply lines and, of course, electrically connected to the lighting arrangement of the optical system. The electrical connection can be made directly, for example, by connecting the connection device directly to connections of the lamp arrangement by electrical conductors, so that an operating current flowing via the supply lines can reach the lamp arrangement directly, so that the lamp arrangement is supplied or controlled in a targeted manner via a central control unit by means of the supply lines or indirectly, in that the connection device is connected to an electronic supply component, control component and/or a sensor of the optical system, which is designed to operate the lighting arrangement of the optical system. For example, the connection device can be connected to an operating device of the optical system that is used for supplying of the illuminant arrangement of the optical system and to which in particular at least one sensor of the optical system is connected. The sensor can be used, for example, to control the lighting arrangement, for example the lighting arrangement can be activated as a function of daylight detected by the sensor or of a temperature detected by the sensor. The connection device is generally preferably arranged on a side of the supporting section that faces away from the covering section. As a result, the connection device is particularly easy to access. The reflector and the cover section preferably form an interior space in which the lighting arrangement is arranged, with the connection device being arranged outside the interior space. The connection device is arranged at least in sections, in particular completely outside of the interior or on the side of the support section facing away from the cover section, so that it is accessible from outside the interior or on the side of the support section facing away from the cover section for the electrical connection of the connection device to supply lines , in particular supply lines, which are provided in the mentioned assembly unit. The connection device is particularly preferably designed as a plug-in device which can be electrically conductively connected to a corresponding plug-in device by means of a plug-in connection. The connection device can be designed, for example, as a plug or as a socket, which is designed for plug-in connection with a corresponding socket or a corresponding plug. Due to the configuration of the connection device as a plug-in device, the lighting module can be used particularly easily, in particular can be connected to supply lines in an electrically conductive manner, for example in a particularly simple manner with supply lines provided in an assembly unit. The connection device is preferably designed as a plug-in device and extends with a plug-in section completely outside of the interior space or on the side of the support section facing away from the cover section, which is designed for plug-in connection with a corresponding plug-in device. The electrically conductive connection between the plug-in device and the plug-in device is therefore preferably made exclusively outside the interior space or exclusively on the side of the support section facing away from the cover section. As a result, a disruptive influence of the connection device or the electrically conductive connection on the emission characteristics of the optical system can be avoided in a particularly effective manner.

The invention also relates to a lighting arrangement comprising an assembly unit and a lighting module according to the invention. The mounting unit has a mounting section for fastening to a component and a plug-in device that corresponds to the connection device designed as a plug-in device. The lighting module can be detachably fixed to the assembly unit, thereby realizing an electrically conductive connection between the plug-in device and the connection device. Depending on the application, the assembly unit can be designed as desired. The detachable connection between the lighting module and the mounting unit allows the lighting module to be connected to the mounting unit in a modular manner in a particularly simple manner, with the detachable connection being provided in such a way that in an operating state of the lighting arrangement in which the lighting module is detachably connected to the mounting unit, the connection device and the Connector are releasably connected to each other. The lighting arrangement particularly preferably comprises at least two, in particular more than two, lighting modules, the mounting unit being elongated in the longitudinal direction and in an operating state of the lighting arrangement, the lighting modules of the lighting arrangement are each electrically conductively connected with their connection device to an associated plug-in device of the mounting unit. In one embodiment, the mounting unit has a plug-in device, which can be designed, for example, as a current-conducting rail, which is explained in more detail below, which is assigned to several, in particular all, light-emitting modules, so that the connection devices of the light-emitting modules are all assigned to this plug-in device and are connected to it in the operating state. In another embodiment, each lighting module is assigned a different plug-in device of the assembly unit. In the operating state, the lighting module is particularly preferably held detachably on the mounting unit by a mechanical connection, while in addition to the mechanical connection the lighting module is detachably connected with its connection device to the plug-in device of the mounting unit. Particularly preferably, the lighting module has a latching device and the mounting unit has a latching device, the latching device being designed to correspond to the latching device and the lighting module being held releasably fixed to the mounting unit by the interaction of latching device and latching device. The mounting unit can be configured, for example, as an elongate mounting body as explained herein or can comprise one which, as explained, has a fastening section and two side sections which are designed to engage with the side sections of the optical element of the optical system, as explained above. With such a configuration of the assembly unit, the plug-in device is on arranged on the mounting body, in particular arranged fixed in position on the mounting body, in particular arranged on the fastening section of the mounting body. In one embodiment, the mounting unit comprises a support rail that is elongated in the longitudinal direction and has a U-shaped cross section. For example, the mounting rail can be made of sheet metal. The support rail has a U-bottom, via which it can be fastened to a component, and two side walls extending away from the U-bottom. The side walls each have a projection. The lighting module has a device mount, which is connected to the support section of the optical system or forms the support section of the optical system, with the device mount being designed to correspond to the support rail in such a way that it is attached to an end of the side walls of the support rail opposite the U-bottom of the support rail Mounting rail can be arranged and can be fixed to the projections of the side walls for releasably fixing the device mount and thus the entire optical lighting module to the mounting rail. The equipment carrier preferably has a U-shaped cross section, which is formed by a base section and two side wall sections of the equipment carrier, with the base section corresponding to the U-base of the mounting rail in an operating state of the lighting arrangement in which the equipment carrier is held detachably fixed to the mounting rail opposite and the side wall sections of the device carrier extend at least in sections along the side walls of the mounting rail, so that the mounting rail encloses a service interior together with the device carrier. Supply lines are preferably arranged in the supply interior. The assembly unit particularly preferably has a current-conducting rail which is elongated in the longitudinal direction and which has a plurality of rails arranged next to one another Has channels that are open on an access side and in each of which a lead wire is arranged, the lead wires forming the supply lines that run in the support rail. The connection device is preferably arranged on the device carrier, in particular on the bottom section of the device carrier. The lighting module can preferably be releasably connected to the mounting rail of the assembly unit by fixing the equipment carrier to the side walls of the mounting rail and contact sections of the connecting device engage in the channels of the current-conducting rail, and in the operating state they are electrically conductively in contact with the conductors that are in the channels of the current-conducting rail are arranged. The current conducting rail thus preferably forms the plug-in device of the assembly unit. A retaining spring is particularly preferably provided on the bottom section of the device carrier, with the retaining spring engaging behind the retaining projections provided on the side walls of the mounting rail in the operating state, while the device carrier has its side wall sections on the mounting rail projections and/or on the ends of the side walls facing away from the U-bottom rests against the mounting rail. The equipment carrier is generally preferably made of sheet metal.

The invention also relates to an arrangement for realizing an optical system according to the invention. The arrangement comprises a reflector and in each case a head element arranged on the longitudinal end side of the reflector and fastened to it. In preferred embodiments, the head element and reflector and thus the arrangement can have features that are described here in connection with embodiments of optical systems according to the invention and/or generic types. The arrangement according to the invention provides a represents an independent solution according to the invention. It is fundamentally suitable for realizing a system according to the invention, with the reflector and the head elements of the arrangement forming the reflector and the head element of the optical system in such a realization. The invention relates in particular to the special attachment of the head element to the reflector provided according to the invention, as explained for preferred embodiments of the optical system according to the invention. The reflector and the head pieces are preferably connected to one another by a latching connection as explained above. In one embodiment, the arrangement according to the invention comprises an elongate reflector, which comprises a support section on which an arrangement of lamps is arranged, and which comprises reflector side sections which are spaced apart from one another in the transverse direction and run in the longitudinal direction due to the support section, and one in each case arranged at the longitudinal end of the reflector and fastened to it header element. At least one of the head elements is preferably attached to the reflector by means of a plurality of snap-in connections spaced apart in a direction perpendicular to the longitudinal direction and perpendicular to the transverse direction, with the reflector having snap-in elements, in particular snap-in recesses, in the region of its side sections, which are connected to associated snap-in elements, in particular those extending in the longitudinal direction Latching hooks of the respective head element cooperate to provide a plurality of latching connections between the reflector and the respective head element.

Figur 1

eine perspektivische Stirnseitenansicht auf eine Leuchte, umfassend ein erfindungsgemäß gestaltetes optische System unter Entfernen von Stirnteilen der Leuchte,

Figur 2

eine perspektivische Stirnseitenansicht auf ein erstes und ein zweites optisches Element zur Gestaltung eines erfindungsgemäßen optischen Systems der Leuchte der Figur 1,

Figur 3

eine perspektivische Stirnseitenansicht auf einen Reflektor zur Gestaltung eines erfindungsgemäßen optischen Systems der Leuchte der Figur 1,

Figur 4

ein Kopfelement zum Verbinden mit dem Reflektor der Figur 3 zur Gestaltung eines erfindungsgemäßen optischen Systems,

Figur 5

das erfindungsgemäße optische System zur Gestaltung der Leuchte der Figur 1 in einem Längsschnitt,

Figur 6 und

einen Längsschnitt durch die Leuchte der Figur 1 mit einer Ansicht auf einen Kopfbereich der Leuchte

Figur 7

in verschiedenen schematischen Prinzipdarstellungen verschiedene Ausführungsformen erfindungsgemäßer Leuchtenanordnungen

zeigt.The invention is explained below by describing an embodiment and modifications with reference to the accompanying drawings, wherein

figure 1

a perspective end view of a lamp, comprising an optical system designed according to the invention with the removal of end parts of the lamp,

figure 2

a perspective end view of a first and a second optical element for designing an optical system according to the invention of the lamp figure 1 ,

figure 3

a perspective end view of a reflector for designing an optical system according to the invention of the lamp figure 1 ,

figure 4

a header for connecting to the reflector of figure 3 for the design of an optical system according to the invention,

figure 5

the optical system according to the invention for the design of the lamp figure 1 in a longitudinal section,

Figure 6 and

a longitudinal section through the lamp figure 1 with a view of a head area of the lamp

figure 7

in various schematic representations of principles of various embodiments of lighting arrangements according to the invention

indicates.

The optical system according to the invention described below is for use in an elongated pendant lamp 1 designed, see figure 1 , which shows this pendant lamp in detail in a perspective end view of a head section with end parts removed to show the basic structure. The essential components of the optical system can be a reflector 2 with a trapezoidal cross section, which can have a reflective coating on the inside and can include a support section that is flat here, to which a light source arrangement, for example in the form of a circuit board 9 with a row arrangement of LEDs, can be attached on the inside. Starting from the support section, the reflector 2 can have two reflector side sections which are spaced apart by this in the transverse direction and run in the longitudinal direction, which are connected at their free end to a first optical element designed here as a lamp cover 4 .

The lamp cover 4 can have a central cover section 40 in the transverse direction, which closes off the reflector 2 and two side sections which are spaced apart from one another in the transverse direction and run in the longitudinal direction, which are designed on the one hand for attachment to the reflector and on the other hand for attachment of the optical system to a mounting body 15 can be trained.

The cover section 40 of the lamp cover 4 can be flat, in particular in the manner of a plane-parallel plate. In the embodiment described, the optical system according to the invention can have an optical sandwich structure 6 as the second optical element, which can be arranged floating on the inside, ie the reflector side, on the cover section of the lamp cover or placed on it. Further details of the optical system according to the invention are explained with reference to the following figures.

figure 2 shows in an individual representation the optical sandwich structure 6 carried by the lamp cover 4 in a perspective view looking at one end face. The lamp cover 4 is composed of the middle section 40 in the transverse direction Y and the side sections 41a, b that adjoin it at a distance from one another in the transverse direction and run in the longitudinal direction. The lamp cover 4 can be designed as a co-extruded part, with the central region being able to be designed in the form of the covering section 40 from a transparent material such as PC or PMMA, while the adjoining side sections 41a, b can have a diffuser material. For example, these side sections can have a transparent material such as PMMA or PC, into which polymer parts are mixed that have a different refractive index to this base material, so that the light introduced into the side sections 41a, b, in contrast to the light transmission in the transparent cover section 40, is strongly scattered . The two side sections 41a, b have grooved flanges extending inward in the transverse direction, here the Y direction, in the form of a lower grooved flange 42a, b and an upper grooved flange 43a, b, which extend in a direction perpendicular to the longitudinal direction and perpendicular to the transverse direction, respectively Groove 44a, b can form for receiving a respectively associated spring section of the reflector 2, see figure 1 .

The side sections 41a, b of the lamp cover 4 can be two vertical sections adjoining one another in the vertical direction (Z-direction, ie a direction perpendicular to the transverse direction and perpendicular to the longitudinal direction of the optical system). 45a, 46a or 45b, 46b, which merge into one another and are offset from one another in the transverse direction, so that they form an undercut for engaging with a respective complementarily designed side section of the mounting body 15, which will be discussed below.

As shown, the cover section 40 of the lamp cover 4 can be designed as a plane-parallel section of an optical plate, on which an optical sandwich structure 6 can rest, which can be composed of an optical plate 60 and a diffuser film 63 lying on the inside. The optical plate 60 of the optical sandwich structure 6 can have a microprism structure 61 on at least one surface in two lateral sections spaced apart from one another by a central section in the transverse direction, in particular to provide a predetermined anti-glare characteristic of the optical system or the lamp equipped therewith.

figure 3 shows a perspective view of an end region of a reflector of an optical system according to the invention for the configuration of in figure 1 specified lamp. The reflector is elongated in the longitudinal direction X and can have a trapezoidal cross section, formed by a support section 20, which can be designed to support the lamp arrangement on the inside, see FIG figure 1 , It being possible for two side sections 22a, b to adjoin the supporting section 20 in the transverse direction. The support section 20 as well as the two adjoining side sections 22a, b can be designed essentially flat, with an angle in the range of approximately 135° being set between the respective side section and support section can. A respective spring section 23a, b can be connected to the respective free end of the side sections 22a, b, which can run, for example, parallel to the support section 20, in particular parallel to the longitudinal direction (X-direction) and parallel to the transverse direction (Y-direction) of the reflector or of the optical system. As with reference to figure 1 explained, the reflector 2 can be designed and arranged to be brought into engagement with its tongue sections 23a,b in the associated groove 44a,b of the lamp cover 4, see FIG figure 1 .

In order to ensure a fixed relative position of reflector 2 and lamp cover 4 in all operating situations, sheet metal cutouts spaced apart in the longitudinal direction can be provided in the area of spring sections 23a, b of reflector 2, which are pivoted out of the respective plane of the spring section to provide respective claws 25, see figure 3 . When the tongue sections 23a, b engage in the respective associated groove 44a, b for fastening the reflector to the lamp cover 4, the claws 25 dig into a groove wall of the respective groove 44a, b, so that a longitudinal displacement of the reflector 2 relative to the lamp cover 4 is prevented .

In the described embodiment of the optical system according to the invention, the reflector 2 can be terminated at the end with a respective head element in a manner to be described below, the connection of reflector and head element being realized via a plurality of snap-in connections spaced apart from one another in relation to the side sections 22a, b. For this purpose, the side sections 22a, b can have a plurality of snap-in recesses 26a, b to 30a, b, which are provided with associated snap-in hooks on a head element can interact in the manner described below. Furthermore, the reflector 2 can have a contact flange 21 on the front side of the support section 20, which can be designed and arranged to exert a contact force in the vertical direction (Z direction), i.e. approximately perpendicular to the longitudinal direction (X direction) and transverse direction (Y direction) of the To effect reflector on the head element. In addition, the end sections of the side sections 22a, b can have projections 31a, b and 32a, b which, in the installed position, similarly bear against associated contact surfaces of the head element and apply a force component in the Z direction to the head element. In principle, in both cases the application of force to the head element can be generated by a slight elastic bending of the reflector.

figure 4 shows a perspective view of a head element 7 that can be arranged on the longitudinal side of the reflector 2 and that can be connected to the reflector in the installed position via a plurality of connecting elements on complementary, ie assigned, connecting elements of the reflector. The head element 7 can have a plate-like shape and be adapted to the cross section of the reflector 2 by a basically trapezoidal shape here. The head element 7 can have snap-in hooks assigned to the snap-in recesses 26a, b to 30a, b of the reflector, wherein a plurality of snap-in hooks 73a, b, 74a, b and 75a, b can be designed to overlap the reflector on the outside, while the snap-in hooks 80a , b and 81a, b the reflector at the in figure 3 Front side shown can overlap inside, so that the latching of the specified latching hooks in the associated latching recesses of the reflector has a form fit in the longitudinal direction and a form fit in a direction perpendicular to the longitudinal direction and perpendicular to the transverse direction between the head element and the reflector.

Each of the snap-in connection can have two mutually associated snap-in elements, ie in the described embodiment a snap-in hook 73a, b, 74a, b and 75a, b as well as 80a, b and 81a, b arranged on the head element, which for snapping in with a respective associated snap-in recesses 26a, b to 30a, b are formed on the reflector. Each of these latching hooks comprises a base section with which the respective latching hook is formed on the head element, an adjoining spring area 82b and a latching projection 83b arranged at the free end of spring area 82b, which is designed for latching with an associated latching recess on the reflector. For clarity of illustration, the individual sections of the snap-in hooks are shown in figure 4 given only for the latching hook 81b. The spring section 82b can be used, on the one hand, to deflect the latching hook during the latching process and, on the other hand, to provide a contact surface for contact with an associated surface section on the reflector, which will be discussed further below.

As indicated in the embodiment described, the latching hooks on the head element 7 can extend parallel to the longitudinal direction and accordingly approximately perpendicular to the planar structure of the head element 7 . Out of figure 4 also shows the contact surface 70 on which the contact flange 21 of the reflector 2 comes to rest in the installed position.

As from a comparison of Figures 3 and 4 As can be seen, the locking recesses 23a, to 30a, b on one end face of the reflector 2 have a different longitudinal extension, while the locking hooks have a different longitudinal extension in relation to their longitudinal extension can be configured identically, so that the snap-in connections can at least partially have a mutually different play in the longitudinal direction (X-direction), which will be discussed in more detail below. The head element 7 can have a further front edge 71 opposite the front edge 70 designed as a contact surface to the reflector, which in the installed position comes into contact with the lamp cover 4 or its cover section in a manner to be described. Furthermore, the head element 7 can have an inner side section 72 running approximately perpendicularly to the front edge 71 in this area of the head element 7, which comes into contact with an assigned front edge of the optical sandwich structure 6 in a manner yet to be explained in the installation position of the components.

After the explanations regarding the design of individual components of the optical system according to the invention, reference is made below to FIG figures 5 and 6 explains a particular functionality of this system according to the invention. figure 5 shows in a longitudinal section the assembled optical system designed according to the invention in a perspective partial view looking at one longitudinal end of the system. Not visible in the figure, the tongue section 23b of the reflector 2 is inserted into the associated groove 44b of the lamp cover 4, the head element being aligned with the longitudinal end of the reflector 2 and the latching elements 73a, b to 75a, b and 80a, b and 81a, b are engaged in the associated recesses 26a, b to 30a, b of the reflector 2. In the installed position, the pressure flange 21 of the reflector 2 is in contact with the associated contact surface 70 of the head element 7, so that the head part with its opposite end edge 71 rests on the inner surface 47 of the light cover 4 within its cover section 40 is pressed. In this respect, in a direction perpendicular to the longitudinal extent of the optical system and perpendicular to the transverse extent, a contact, in particular a force-loaded contact, can be provided between the head element 7 and the lamp cover 4 in the form of a prestressed surface contact of the front edge 71 of the respective head part 7 and the reflector-side or inner surface (Main surface) 47 of the cover portion of the lamp cover 4.

In addition, the head element 7 can, on its side facing the cover section 40 of the light cover 4 , rest with an inner side section 72 on an associated end face 64 of the second optical element, which is embodied here as an optical sandwich structure 6 . Such a system can be essential for the appearance of the optical system according to the invention or a lamp designed with this system and can be maintained over all possible operating situations by the design according to the invention. Otherwise an observer could look through the cover section 40 and the undesired gap into the interior of the optical system and thus, for example, onto the light source arrangement, which can disturb a harmonious overall impression of the optical system or a luminaire equipped with it. Therefore, in the optical system according to the invention, provision can be made to provide a frictional connection in the longitudinal direction between the head element and the covering section 40 of the lamp cover 4, which enables the head element to move outwards, in particular when the longitudinal extension of the optical sandwich structure 6 is increased, while maintaining a gap-free contact of the inner side section 72 on the end face 64 of the optical sandwich structure and while maintaining a gap-free contact of the end edge 71 of the head element and the inner surface 47 within the covering section 40 of the lamp cover 4. To provide such a displaceability of the section of the head element 7 facing the covering section 40 in the longitudinal direction, the head element can be designed and arranged to be elastically deflectable in this area.

In an embodiment that is not shown, it is also possible for one, in particular both, of the head elements 7 in a direction perpendicular to the longitudinal extension and perpendicular to the transverse extension not to have an end face 71 of the respective head element 7 rest against the reflector-side surface (main surface) 47 of the first optical element 4 to provide, but a minor game. An elastic deflection of the head element in the area of the first optical element 4, caused by a change in length of the second optical element 6, can thus be brought about particularly easily, since no frictional connection between the head element 7 and the first optical element 4 has to be overcome.

Like in particular figure 5 As can be seen, for this purpose it can be provided that the lamp cover 4 and thus also its cover section 40 extends in the longitudinal direction over the longitudinal extent of the optical sandwich structure 6 and the head element, such that in all operating situations the front edge 71 of the head element 7 is on the inner surface 47 of the cover portion 40 of the lamp cover 4 is present. To facilitate the elastic deflection of the head part in the area of its side facing the cover section 40 of the lamp cover 4, the thickness, ie the longitudinal extension, of the head part in this area can be reduced relative to the thickness of the section facing the support section of the reflector 2.

In order to compensate for possible manufacturing tolerances of the components even at low temperatures, which under certain circumstances can result in shrinkage of the optical sandwich structure 6 in the longitudinal direction, it can be provided that the optical sandwich structure 6 between the two head elements 7, which the optical system frontally complete, is used with an excess, so that even in such cases, by dissolving elastic reaction states in the respective head element, the desired gap-free states between the head element and the optical sandwich structure and between the head element and the covering section 40 can be reliably maintained. At the same time, an automatic centering of the second optical system (optical sandwich structure) to the first optical element (luminaire cover) can be provided.

In order to guide the head element in the installed position relative to the first optical element or the lamp cover 4 in the longitudinal direction, it can be provided that the head element 7 has two lateral spring sections 76 (see 4 ) arranged and adapted to engage a respective associated longitudinal groove 49 on the lamp cover (see figure 2 ). How out figure 5 As can be seen, it can be provided in the described embodiment that one of the groove walls of this longitudinal groove 49 is provided by a lateral area of the cover section of the lamp cover. The other groove wall of this longitudinal groove 49 can be provided by the lower groove flange 42, b of the groove for receiving the reflector spring sections 23a, b. Due to the design described, the displaceability of the head element 7 is guided in Provided in the longitudinal direction X or a guide for the elastic deflection of the head element in the longitudinal direction X in the area facing the covering section of the first optical element.

Regarding figure 4 it was explained above that the locking hooks, which extend approximately vertically in the longitudinal direction, can be designed and arranged to rest alternately on the inside and the outside of the reflector. For example, in the representation of figure 5 the latching hook 81b with its spring section 82b on the inside of the reflector and is latched with the associated latching recess 29b, while the latching hook 75b rests with its spring section on the outside of the reflector 2 and is brought into engagement with the associated latching recess 30b of the reflector. As can also be seen from the figure, the projections 31b, 32b of the reflector 2, which can be seen here, lie against an associated side edge of the head element 7 in the installed position.

In order to provide an elastic deflection of the head element 7 in the longitudinal direction, it can expediently be provided that the snap-in connections, which are arranged adjacent to or in the vicinity of the end edge of the head element that rests on the cover section 40 of the lamp cover 4, have greater play in the longitudinal direction than Snap-in connections that are located further away from this end face, ie closer to the support section of the reflector. This situation goes out in particular figure 6 out which of the representation of figure 5 corresponds, but with a viewing direction perpendicular to the longitudinal section plane, with the further difference to figure 5 the figure 6 represents a section through the entire lamp, in which the optical system of figure 5 is used. As can be seen, the latching connection closest to the base section 40 of the lamp cover 4, comprising the latching element 73b of the head element 7 and the latching recess 26b of the reflector 2, can have a predetermined longitudinal play S1, which makes it possible to elastically deflect the head element 7 outwards in the longitudinal direction in this area. when the optical sandwich structure 6 presses with its end face 64 against the inner side section 72 of the head element 7, for example due to thermal expansion. An elastic deflection can be compensated in the same way in the optical system according to the invention when the optical sandwich structure shrinks in the longitudinal direction, for example by cooling down when the lamp is dimmed, in which case elastic reaction forces are released in the head element and thus automatically the inner side section 52 of the head element while maintaining a gap-free system on the end face 64 of the optical sandwich structure is tracked.

In the representation of figure 6 the second latching hook 74b on the outside of the reflector, which is arranged in the associated latching recess 28b, has a play S2 in the longitudinal direction of approximately zero, so that in this area of the connection there can be a connection between the reflector and the head element that is essentially rigid in the longitudinal direction. In contrast, the latching connection closest to the reflector support section can in turn have a small amount of play S3 in the longitudinal direction, in particular a play of approximately zero, so that the head element can be fastened without play in the longitudinal direction in a section close to the reflector support section, while the head element can be attached in a reflector support section remote from the cover section Near section can be attached with a longitudinal play, so in this area the head element is arranged so as to be elastically deflectable in the longitudinal direction. In one embodiment it can also be provided that the latching connections between the head element and the reflector are not provided in the section close to the covering section. In another embodiment, instead of snap-in hooks, longitudinally extending contact flanges can be provided on the head element, which abut the reflector in the same way as the spring sections of the snap-in hooks and contribute to maintaining its contours.

The representation of figure 6 shows a longitudinal section through a pendant lamp which has an optical system designed according to the invention. The luminaire can have an approximately cuboid mounting body 15 which is open on a main side in the light emission direction and is designed to accommodate an optical system designed according to the invention. In this case, the mounting body 50 can have a respective end face termination 16 on the front side, it being possible for the luminaire to be terminated on the front side with a respective luminaire head part 90 . Depending on the operating situation, a longitudinal gap can be formed on the face side between the longitudinal end of the lamp cover 4 and the lamp head part 90, the width of which in the longitudinal direction can depend on the operation. To avoid looking into the interior of the optical system through the head element, the head element can be made of a diffuser material or covered with a diffuser layer.

To describe the connection between the mounting body 15 and the optical system, reference is again made to the representation of FIG figure 1 . The mounting body 15 can have a fastening section 17, on which the lamp is fastened to a building, in particular as a pendant lamp. Two side sections 18a, b can extend from this fastening section 17, which is flat here, at an angle of approximately 90°, with the side sections each forming an internal vertical section 19b at their free ends, which can be brought into engagement with the above-described undercut on the side sections 41a , b of the lamp cover 4. This undercut provided in the vertical direction (Z-direction) is formed by the two vertical sections 45a, 46a and 45b, 46b of the respective side section 41a, b of the lamp cover 4, which are offset in the transverse direction. In the embodiment described, the engagement of the optical system or the lamp cover with the mounting body can be carried out by longitudinally aligning and longitudinally moving both components towards one another.

The optical sandwich structure 6 can be inserted into the lamp cover in the same way by aligning it with the lamp cover and sliding it relative to one another in the longitudinal direction. In contrast, the reflector 2 can first be inserted by aligning the reflector to the lamp cover 4 in the longitudinal direction and then by inserting the respective spring section 23a, b of the reflector 2 in the transverse direction into the associated groove 44a, b of the lamp cover 4, with the claws 25 in the Hook into the groove walls to prevent the reflector and luminaire cover from shifting in the longitudinal direction.

How out figure 1 Indirectly visible, for the homogenization of the light emitted by the LEDs on the LED circuit board 9, primary optics can be provided as a further optical element, which extend over the entire length of the Reflector 2 can extend, in particular for receiving and predetermined steering of the light in the transverse direction. 1 . shows holding hooks 10 spaced apart in the transverse direction and arranged at the edge of the circuit board for holding the described, optional but not shown primary optics.

In figure 7 including the Figures 7a , 7b and 7c different embodiments of a lighting arrangement according to the invention are shown in different schematic representations. All embodiments of the lighting arrangement according to the invention include an assembly unit 101 and a lighting module 100. The lighting module 100 includes an embodiment of an optical system according to the invention, on whose properties to explain the figure 7 is not discussed in more detail, reference being made to the above explanations.

In the embodiment according to Figure 7a For example, the assembly unit 101 has a support rail with a U-shaped cross-section, which includes a U-bottom and two side walls extending away from the U-bottom. A current conducting rail is arranged on the U-bottom as a plug-in device 120, which has channels arranged next to one another, which are open on an access side and in each of which a line wire is arranged. The lighting module 100 has a device mount 110 which has a U-shaped cross section. The connection device 200 of the lighting module 100 is arranged on a bottom section of the equipment carrier 110, which, as in Figure 7a shown, engages with contact sections in the channels of the current conducting rail and rests in an electrically conductive manner on the conductor wires arranged in the channels. The lighting module 100 has a latching device 150, which in Figure 7a is shown very simplified schematically. the Latching device 150 is designed as a retaining spring, which is offset in the longitudinal direction to the connection device 200 and thus in Figure 7a is arranged on the bottom section of the device carrier 110 so that it is essentially concealed by this. The latching device 150 can be actuated via the actuating element 160 . The lighting module 100 can be detachably fixed to a corresponding locking device 151 of the assembly unit 101 with this locking device 150 . The latching device 151 is formed by projections formed on the side walls of the support rail. in the in Figure 7a In the operating state shown, the device carrier 110 presses with its side wall sections against the projections, ie latching device 151, while the latching device 150 rests on the opposite side of the projections or latching device 151. At the in Figure 7a The exemplary embodiment shown and according to the invention is generally advantageous with a single, in particular linear, assembly movement, the lighting module 100 can be mechanically connected to the assembly unit 101 and at the same time the connecting device 200 can be electrically conductively connected to the plug-in device 120 with this assembly movement. The embodiment according to Figure 7b essentially corresponds to the embodiment according to FIG Figure 7a , which is why reference is made to the above explanations. However, the embodiment differs according to Figure 7b from the according Figure 7a in that the lighting module 100 also has a housing 111 . The housing 111 can, for example, as the figure 1 be formed assembly body explained and thus correspondingly comprise a fastening portion and side portions. The attachment section is in the in Figure 7b shown embodiment and according to the invention generally advantageously connected to the device carrier 110. The embodiment according to Figure 7b has the particular advantage that the lighting module has one of the housing 111 has enclosed interior space in which the light source arrangement and the reflector of the light-emitting module 100 are arranged, which is generally advantageous according to the invention. Such a lighting module 100 can therefore be used particularly easily and essentially independently of the design of the assembly unit, since the reflector and lighting arrangement are already sufficiently protected in the lighting module itself, with lighting module 100 itself preferably constituting an optical closure with its housing 111, which in the The operating state of the lighting arrangement is arranged outside of the assembly unit 101, in particular extends beyond the assembly unit 101 in at least two mutually perpendicular spatial directions, and is visible to an observer from the outside. In the embodiment according to Figure 7c the connection device 200 is attached directly to the support section 20 of the reflector. The mounting unit 101 is designed as a lamp housing which, as stated above for the mounting body, has a fastening section and side sections. The side sections form latching projections as latching device 151 of the assembly unit 101, with which in Figure 7c In the operating state shown, the latching projections of a correspondingly designed latching device 150 of the lighting module 100 are latched, as a result of which the lighting module 100 is held on the mounting unit 101 in a detachable and at the same time reliably fixed manner. The connecting device 200 is in the form of a plug-in device, and the plug-in device 120 is in the form of a current-carrying rail with open channels and line wires arranged therein, so that the connecting device 200 and plug-in device 120 are as in the exemplary embodiments according to FIG Figure 7a and 7b explained are particularly easy to connect to each other for electrically connecting the connection device 200 to the arranged in the assembly unit 101 Supply lines, which are presently formed by the line wires explained.

reference list

1

lamp

2

reflector

4

Luminaire cover / first optical element

6

Optical sandwich structure / second optical element

7

header element

9

LED circuit board

10

Bracket for primary optics

15

assembly body

16

face section

17

attachment section

18a, b

side section

19a, b

vertical section

20

carrying section

21

pressure flange

22a, b

side section

23a, b

spring section

24

clearance

25

claw, claw element

26a, b 27a, b 28a, b 29a, b 30a, b

recess

31a, b

head Start

32a, b

head Start

40

cover section

41a, b

side section

42a, b

Lower grooved flange, retaining flange

43a, b

Upper groove flange

44a, b

groove

45a, b

vertical section

46a, b

vertical section

47

Inner surface

48

outer surface

49

longitudinal groove

60

optical disc

61

microprismatic structure

63

diffuser sheet

64

face

70

contact surface

71

front edge

72

inside section

73a,b 74a,b 75a,b

External snap hook

76

spring section

80a,b 81a,b

Inside snap hook

90

lamp head part

100

light module

101

assembly unit

110

equipment carrier

111

Housing

120

connector

150

locking device

151

locking device

160

actuator

200

connection device

X

longitudinal direction

Y

transverse direction

Z

height direction

i.e

longitudinal oversize

s1, s2, s3

backlash

Claims (18)

Optical system for an elongate lamp (1), comprising - an elongate reflector (2), comprising a support section (20) on which a lighting arrangement is arranged and reflector side sections (22a, b) which are spaced apart from one another in the transverse direction (Y) and run in the longitudinal direction (X) through the support section, - a first, elongate optical element (4), which closes the reflector (2) with a flat covering section (40), with side sections (41a, b) of the optical connect the first element (4) to which the reflector (2) is attached, - a second, elongated and flat optical element (6), which is arranged on the reflector side on the covering section (40) of the first optical element (4), - in each case a head element (7) arranged on the longitudinal end side of the reflector (2) and in particular fastened to it, characterized in that that the second optical element (6) is supported on the first optical element (4), and that the respective head element (7) rests with an inner side section (72) on an associated end face (64) of the second optical element (6) and is formed and is arranged, in the event of an operational change in length of the second optical element (6) in the longitudinal direction (X), its inner side section (72) rests without a gap on the associated end face (64) of the second optical element (6) by tracking the inner side section (72). receive. Optical system according to Claim 1, characterized in that the respective head element (7) is designed to be elastic and the tracking of the inner side section (72) is effected by generating or releasing elastic restoring forces in the head element (7). Optical system according to Claim 1 or 2, characterized in that the inner side section (72) of the respective head element (7) bears against the associated end face (64) of the second optical element (6) with a force applied in the longitudinal direction. Optical system according to claim 1, 2 or 3, characterized in that in the area of a contact section of the first optical element (4) to at least one of the head elements (7), the covering section (40) of the first optical element (4) is in Longitudinally (X) extends beyond the at least one head element (7) and the head element (7) bears against the covering section (40) of the first optical element (4) with a front edge (71) subjected to a force. Optical system according to one of claims 1 to 4,
characterized in that at least one of the head elements (7) has a contact in a direction (Z) perpendicular to the longitudinal direction (X) and perpendicular to the transverse direction (Y), in particular a force-loaded contact and in the longitudinal direction (X) a frictional connection to the first optical element ( 4) has. Optical system according to one of claims 1 to 5,
characterized in that at least one of the head elements (7) is attached to the reflector (2) by means of a plurality of snap-in connections spaced apart in a direction (Z) perpendicular to the longitudinal direction (X) and perpendicular to the transverse direction (Y). Optical system according to one of claims 1 to 6,
characterized in that the reflector (2) is trapezoidal in cross-section and the respective head element (7) is designed to be trapezoidal and adapted thereto. Optical system according to one of Claims 6 or 7, characterized in that the reflector (2) has locking elements, in particular locking recesses (26a, b - 30a, b) in the region of its side sections (22a, b) which are connected to associated locking elements, in particular extending in the longitudinal direction (X). Latching hooks (73a, b; 74a, b; 75a, b; 80a, b; 81a, b) of the respective head element (7) cooperate to provide a plurality of latching connections between the reflector (2) and the respective head element (7). Optical system according to one of Claims 1 to 8, characterized in that the respective side sections (41a, b) of the first optical element (4) have a longitudinally extending groove (44a, b) on the inside for receiving a respective, associated, on a of the two side sections (22a, b) of the reflector (2) arranged spring section (23a, b). Optical system according to one of Claims 1 to 9, characterized in that the side sections (22a, b) of the reflector (2) have claw elements (25) which are spaced apart in the longitudinal direction (X) and which are located at associated points on the side sections (41a, b) of the first optical element (4) get caught. Optical system according to one of Claims 1 to 10, characterized in that the second optical element (6) is supported at its longitudinal edges by a retaining flange (42a, b) running in the transverse direction of a respective side section (41a, b) of the first optical element (4). is exceeded. Optical system according to one of claims 1 to 11, characterized in that - The second optical element (6) is designed as a light-guiding element and has a sandwich structure comprising at least one diffuser film (63) and one with an optical plate (60) provided at least in sections with a microprismatic structured surface, and/or that - The side sections (41a, b) of the first optical element (4) extend at an angle of between 60 degrees and 120 degrees, in particular approximately 90 degrees, to the cover section (40). Optical system according to one of claims 1 to 12, characterized in that - the first optical element (4) is a coextrusion part in which the cover section (40) is made of a transparent material and the side sections (41a, b) are made of a diffuser material, and/or that - The at least one head element (7) is coated on the outside with a diffusion material and/or is made of a diffuser material. Optical system according to one of claims 1 to 13, characterized in that - the support section (20) of the reflector (2) comprises holding elements (10) for holding a third, elongated optical element for homogenizing the light emitted by the illuminant,
and or - The side sections (41a, b) of the first optical element (4) have holding areas for engaging with associated holding areas of a mounting body (15) of a lamp (1). Lamp (1) comprising an elongate mounting body (15) which is designed to accommodate an optical system according to any one of claims 1 to 14, comprising a fastening portion (17) for fastening the lamp (1) to a component, and two of this side sections (18a, b) extending approximately perpendicularly, the side sections each having a holding area for engaging with associated holding areas of the side sections of the first optical element (4) of the optical system for holding the optical system in the mounting body (15),
electronic supply components, control components and/or sensors for operating the lighting means of the optical system being preferably arranged between the inner walls of the mounting body (15) and the outer walls of the reflector (2). Lighting module (100) comprising an optical system according to one of Claims 1 to 15, characterized in that the lighting module (100) comprises a connection device (200) which is electrically connected to the lighting arrangement and on a side remote from the cover section (40). of the support section (20), the connection device (200) in particular being designed as a plug-in device which can be electrically conductively connected to a corresponding plug-in device by means of a plug-in connection. Lighting arrangement comprising a mounting unit (101) and a lighting module (100) according to claim 16, wherein the mounting unit (101) has a mounting portion for attachment to a component and to the plug-in device trained connection device (200) corresponding plug device (120), wherein the lighting module (100) can be releasably fixed to the assembly unit while realizing an electrically conductive connection between plug device (120) and connection device (200). Arrangement for realizing an optical system according to one of Claims 6 to 15, comprising - an elongate reflector (2), comprising a support section (20) on which a lighting arrangement is arranged and reflector side sections (22a, b) which are spaced apart from one another in the transverse direction (Y) and run in the longitudinal direction (X) through the support section, - in each case a head element (7) arranged on the longitudinal end side of the reflector (2) and fastened to it, characterized in that at least one of the head elements (7) is arranged by means of a plurality of in a direction (Z) perpendicular to the longitudinal direction (X) and perpendicular to the transverse direction (Y) spaced latching connections on the reflector (2), the reflector (2) having latching elements, in particular latching recesses (26a, b - 30a, b) in the area of its side sections (22a, b), which are connected to associated latching elements, in particular Latching hooks (73a, b; 74a, b; 75a, b; 80a, b; 81a, b; 81a, b; 81a, b; 81a, b) of the respective head element (7) extending in the longitudinal direction (X) to provide a plurality of latching connections between the reflector (2) and the respective head element ( 7) interact.

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