Optical element for a light and light with optical element

Description

[0001] The present invention relates to an optic for a luminaire according to the preamble of claim 1. The invention also relates to a luminaire equipped with such an optic.

[0002] A generic optical system is known from NL 20 23 024 B1. This optical system is suitable for use in a luminaire, which can, in particular, be part of a continuous light strip comprising several such luminaires. The optical system has a longitudinally straight and elongated optical body made of a light-conducting and light-transmitting plastic. The optical body has a snap-fit ​​contour on each of its opposing longitudinal edges, by means of which the optical system can be fixed to a support body of the luminaire, in particular by a clip or snap connection. The optical body has a longitudinally extending central region between the longitudinal edges. Furthermore, the optical body has a longitudinally extending side region on both sides of the central region and between the longitudinal edges.On its inner surface, the optical body has a longitudinal lens in the central region for light injection, extending along the length of the optic. In the known optic, the optical body has different relief structures for light emission on its outer surface, facing away from the inner surface, in the central region and in the two side regions. When the optic is installed, its inner surface faces the light-emitting elements of the luminaire, while the outer surface of the optic faces away from these light-emitting elements.

[0003] A similar optic is known from DE 10 2011 012 653 B4. There, the optical body has transverse prisms for light emission on its outer surface across the entire width of the optical body, which follow one another in the longitudinal direction of the optic.

[0004] In DE 10 2014 004 472 A1, the transverse prisms on the outside are only arranged in the central area, in which a TIR reflector is located on the inside, where TIR stands for Total Internal Reflection stands.

[0005] From DE 43 21 290 A1 an optic is known which has transverse prisms on the outside in the middle area and longitudinal prisms in the two side areas, which follow one another in the transverse direction of the optic.

[0006] Another optic with a longitudinal lens on the inside is known from EP 3 607 247 B1.

[0007] The present invention addresses the problem of providing an improved or at least a different embodiment for an optic of the aforementioned type or for a lamp equipped therewith, which is characterized by efficient light emission and / or reduced manufacturing costs.

[0008] This problem is solved according to the invention by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims.

[0009] The invention is based on the general concept of combining transverse and longitudinal prisms on the outer surface of the optical body. Specifically, it is proposed that the optical body has transverse prisms for light emission in the central region of its outer surface, arranged successively along the longitudinal direction of the optics, while the optical body has longitudinal prisms for light emission in the side regions of its outer surface, arranged successively along the transverse direction of the optics. The proposed combination of transverse prisms in the central region and longitudinal prisms in the side regions results in particularly efficient light emission with a high-quality, homogeneous illumination effect. The transverse and longitudinal prisms are integrally formed within the optical body, which also allows for the relatively inexpensive production of this efficient optic.For example, the optics can be manufactured by an extrusion process, wherein at least the transverse prisms, and preferably also the longitudinal prisms, are produced in an embossing process by forming, which immediately follows the extrusion, so that the plastic of the optical body is still sufficiently warm and fluid for the forming.

[0010] According to the invention, the optical body has a longitudinal notch on its outer surface in the central region on both sides of the transverse prisms for light reflection inside the optical body. Through light reflection inside the optical body, each longitudinal notch improves the light transmission from the longitudinal lens to the lateral regions where the longitudinal prisms meet. This design allows more light to be emitted via the longitudinal prisms. In particular, this design also makes it possible to increase the overall width of the optics, thus enabling a comparatively large, evenly distributed light emission from the respective luminaire.

[0011] According to an advantageous embodiment, the optical body can have a flat, plate-shaped base from which the locking contours project on the outside and / or inside, and from which the longitudinal lens projects on the inside. This allows functionally different areas to be integrally formed on the optical body, which reduces manufacturing costs.

[0012] In another embodiment, the longitudinal lens can have two longitudinally inclined side walls, which, with respect to a vertical direction of the optics, begin on the inside between the transverse prisms of the central region and the longitudinal prisms of the respective side region and end in the region of the transverse prisms. It has been shown that the light injection into the transverse and longitudinal prisms can be improved with the aid of such a longitudinal lens shape.

[0013] In another embodiment, the longitudinal lens can have a longitudinal groove extending along its length at the end furthest from the inside. This groove is bounded laterally (i.e., in the transverse direction) by two opposing groove walls and vertically (i.e., in the inward direction) by a groove base. This longitudinal groove particularly improves the light feed into the optical body. For example, when installed, light-emitting elements of the luminaire can project at least partially into this longitudinal groove, so that light emitted by these elements enters the optical body not only via the groove base but also via the groove walls.

[0014] A particularly advantageous further development proposes that the respective groove wall at the end of the longitudinal lens furthest from the inside transitions into the respective longitudinal side wall of the longitudinal lens. In particular, an acute angle can be formed between the respective groove wall and the respective longitudinal side wall, which improves the light-guiding function within the longitudinal lens.

[0015] In another advantageous embodiment, the groove base can be convex towards the groove opening or prismatically shaped, projecting towards the groove opening. This proposed shape improves the light input into the optical body, particularly with regard to improved light transmission to the longitudinal prisms.

[0016] For example, it may be provided that the width of the light optics on the outside of the optical body is dimensioned so large that the width of the optical body in the transverse direction of the optics is about three times as large as the width of the longitudinal lens on the basic shape of the optical body.

[0017] In addition to the longitudinal notches, the optical body may be designed with a longitudinally extending, flat surface section on its outer surface between the transverse prisms and the longitudinal prisms of the respective side region. This surface section is flat on the outer surface of the optical body and therefore has no light-emitting structure, such as prisms or the like. This facilitates the light transmission from the longitudinal lens to the longitudinal prisms within the optical body. The respective flat surface section may be bounded by the aforementioned longitudinal notches towards the transverse prisms, so that each longitudinal notch forms a transition from the transverse prisms to the respective flat surface section.

[0018] In another advantageous embodiment, the respective light notch may have an inner flank facing the transverse prisms and an outer flank facing away from the transverse prisms, wherein the respective inner flank is inclined relative to the transverse direction of the optics in a range of 70° to 110°, preferably in a range of 80° to 100°, more preferably in a range of 85° to 95°, and in particular by 90°. In contrast, the respective outer flank has an inclination relative to the transverse direction of the optics in a range of 30° to 60°, preferably in a range of 35° to 55°, more preferably in a range of 40° to 50°, and in particular by 45°. It has been shown that such an inclination or design of the flanks for the longitudinal notch promotes light reflection within the optical body in order to achieve the most efficient light transmission within the optical body.

[0019] In another advantageous embodiment, the outer flank of each longitudinal notch can extend parallel to the adjacent longitudinal side wall of the longitudinal lens. This allows the light introduced into the optical body via the longitudinal lens to be channeled within the optical body and efficiently directed to the side regions or to the longitudinal prisms.

[0020] According to an advantageous embodiment, the optical body can have a longitudinally extending retaining rib on its inner side in each side region. This rib has a base connected to the optical body and a retaining area located away from the base, projecting beyond the longitudinal lens in a vertical direction. The retaining ribs can be used, for example, to position and secure a circuit board carrying light-emitting elements. Due to their dimensions, the retaining ribs project beyond the longitudinal lens in the vertical direction. This prevents, for example, contact between the circuit board, and especially the light-emitting elements, and the longitudinal lens. This reduces the thermal stress on the longitudinal lens during operation of the luminaire. The respective retaining rib is projecting at least with its base in the respective side region in the transverse direction of the luminaire.the optics are located between the longitudinal lens and the longitudinal side edge.

[0021] In an advantageous further development, the respective holding area may be provided with a support surface and a collar projecting from the support surface. The support surface, which extends particularly in the longitudinal and transverse directions, can be used to place a component, especially the aforementioned circuit board, vertically. The collars, with respect to the transverse direction, ensure lateral positioning or fixation of the component or circuit board.

[0022] Another improvement proposes that the foot sections of the two support struts be spaced further apart in the transverse direction than the support sections. This measure allows for the creation of longitudinal lenses with a relatively large transverse dimension. It also creates a transverse gap between the support struts and the longitudinal lens, simplifying the manufacturing of the optics.

[0023] A luminaire according to the invention, which is particularly suitable for use in a continuous lighting system comprising several such luminaires, has a mounting bracket comprising a longitudinally elongated and straight support body, two opposing support sides, a base connecting the support sides, and a mounting opening opposite the base, which opens into an interior space bounded by the base and the two support sides. The luminaire also has at least one circuit board arranged on the base within the interior space, which carries a plurality of light-emitting elements arranged one behind the other in a longitudinal direction of the luminaire. Furthermore, the luminaire is equipped with at least one optic of the type described above, which is fixed to the support sides by its snap-in contours and thereby closes the mounting opening.During operation of the luminaire, the light generated by the light-emitting elements is fed into the longitudinal lens of the optics and emitted on the outside of the optical body via the transverse prisms and the longitudinal prisms.

[0024] According to an advantageous embodiment, the optics can be supported on the circuit board by means of retaining tabs. The contact between the optics and the circuit board ensures a predetermined relative position between the circuit board and the optics within the luminaire. This eliminates a large number of manufacturing tolerances, which improves the quality of the light emission.

[0025] According to a particularly advantageous embodiment, the carrier body, the circuit board, and the optics can be aligned such that the optics, fixed to the carrier body, press the circuit board against the carrier base with preload. This measure defines the relative position between the circuit board and the carrier body, thereby eliminating further tolerances and improving the quality of the light emission.

[0026] According to another embodiment, in which the longitudinal lens of the optic is equipped with a longitudinal groove, the light-emitting elements can be positioned to immerse themselves in this longitudinal groove. This ensures that virtually all the light emitted by the light-emitting elements can be introduced into the optical body via the longitudinal lens. Consequently, losses are reduced, while efficiency increases.

[0027] In another embodiment, the groove walls at the end of the longitudinal lens furthest from the inside can transition into the longitudinal side walls of the longitudinal lens via end contours. These end contours are spaced away from the circuit board on both sides of the light-emitting elements, creating a gap between the circuit board and the longitudinal lens. This closes the longitudinal groove with the circuit board against the groove base, except for the aforementioned gap, so that the light emitted by the light-emitting elements can propagate almost exclusively within the longitudinal groove and enter the optical body virtually completely.

[0028] The light-emitting elements are preferably light-emitting diodes.

[0029] The luminaire can be equipped with an end cap that covers one longitudinal end of the gear tray and the optics. The end cap has a base extending both vertically and laterally, and a collar projecting longitudinally from it. When the end cap is installed, the collar rests against the sides of the tray and the outside of the optic body. The end cap thus seals the respective longitudinal end of the gear tray. Optionally, the end cap can have a transverse rib projecting longitudinally from the base, which, when the end cap is installed, rests against an outer surface or top of the tray base facing away from the interior of the tray. This can improve the sealing effect.Optionally, the end cap can have a main support structure projecting from the cap base on each side of the carrier, bearing against the inside of the respective carrier side and against an inner surface of the carrier base facing the interior of the carrier. This improves the seal against the optics. For improved sealing, another embodiment provides that the end cap has an additional support structure projecting from the cap base on each side of the main support structure, bearing against the inside of the optical body when the end cap is mounted. Optionally, the respective additional support structure can be designed to bear against the inside of the optical body and / or against the respective retaining rib on both sides of the respective retaining rib and / or against the longitudinal lens. Optionally, the additional support structure can have a gap for bearing against the respective retaining rib on both sides, into which the retaining rib axially penetrates.In another embodiment of the end cap, the respective main support structure may have a locking lug which, in the mounted state of the end cap, engages or locks into a locking opening formed in the carrier base and secures the end cap against axial removal from the device carrier.

[0030] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0031] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention. Components of a higher-level unit, such as a device, apparatus, or arrangement, mentioned above and those to be mentioned below, which are designated separately, can form separate parts or components of this unit or be integral areas or sections of this unit, even if this is depicted differently in the drawings.

[0032] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components.

[0033] They show, schematically, Fig. 1 a simplified cross-section through a luminaire in the area of ​​a connector, Fig. 2 a simplified side view of a light strip with several luminaires, Fig. 3 a cross-section through an optic of the luminaire, Fig. 4 a bottom view of an outer surface of the optic in the area of ​​a longitudinal end of the optic, Fig. 5 a cross-section through a device carrier with optic during mounting of the optic, Fig. 6 a cross-section as in Fig. 5 , however, after mounting the optics, Fig. 7 an isometric view of the device carrier during the mounting of an end cap of a first embodiment, Fig. 8 a cross-section of the device carrier made of Fig. 7 With the end cap mounted, looking towards the end cap, Fig. 9 shows an isometric view of the device carrier during the mounting of an end cap of a second embodiment, Fig. 10 shows a cross-section of the device carrier made of Fig. 9 With the end cap mounted, looking towards the end cap, Fig. 11 shows an axial view of the end cap from the Figs. 9 and 10.

[0034] Accordingly Figure 1 has a light 1 which is in Figure 1 The cross-section, which is shown perpendicular to the longitudinal direction X, comprises a support profile 2, at least one current-carrying rail 3, at least one device carrier 4, at least one optic 5, and at least one connector 6. The longitudinal direction X is in Figure 2 indicated by a double arrow and is located in the Figure 1 , 3 , 5, 6 , 8 , 10 and 11 perpendicular to the plane of the drawing. The lamp 1 has an elongated and straight shape with respect to the longitudinal direction X. According to Figure 2 The luminaire 1 can be used, in particular, in a continuous light strip 7 in which several such luminaires 1 are arranged one behind the other in the longitudinal direction X and are directly connected to each other. The luminaire 1 or the continuous light strip 7 can be designed for suspended ceiling mounting. Figure 2A ceiling 8 is shown, to which the light strip 7 or the lights 1 are attached or suspended via several fastening elements 9.

[0035] The device carrier 4 has a longitudinally elongated and straight support body 10, which has two support sides 11 opposite each other with respect to the transverse direction Y, a support base 12 connecting the two support sides 11, and a support opening 13 opposite the support base 12 with respect to a vertical direction Z. The transverse direction Y and the vertical direction Z are in the Figure 1 , 3 and 5 to 11The directions are indicated by double arrows and lie in the plane of the drawing. The transverse direction Y runs perpendicular to the longitudinal direction X. The vertical direction Z runs perpendicular to both the longitudinal direction X and the transverse direction Y. When assembled, the longitudinal directions X of the luminaire 1, the support profile 2, the equipment carrier 4, and the optics 5 run parallel to each other and are uniformly designated X. The same applies to the transverse direction Y and the vertical direction Z.

[0036] The support base 12 and the two support sides 11 define an interior space 14, towards which the support opening 13 is open. The optic 5 is fixed to the support sides 11, preferably by a snap-fit ​​connection 15 or a clip connection 15. The optic 5 closes the support opening 13 in the vertical direction Z.

[0037] According to the Figure 1 , 3 and 4The optic 5 has a straight and elongated optical body 16 with respect to the longitudinal direction X, which consists of a light-guiding and light-transmitting plastic. For example, the optical body 16 can be made of acrylic glass. It is also conceivable to make the optical body 16 of polycarbonate.

[0038] The optical body 16 has a detent contour 18 on each of its longitudinal side edges 17 facing away from each other with respect to the transverse direction Y, which in the assembled state according to Figure 1The optical body 16 or the optics 5 are secured by corresponding locking contours 19 on the support sides 11, forming the locking connections 15. To improve the sealing of the support interior 14 against the environment 24 of the luminaire 1, sealing areas 42 can be formed on the optical body 16, on its longitudinal side edges 17. In the installed state, these sealing areas bear against the support sides 11 or the locking contours 19, respectively, and are pre-tensioned in the transverse direction Y. These sealing areas 42 can be injection-molded onto the optical body 16. Alternatively, the sealing areas 42 can be integrally formed on the optical body 16 using a two-component (2K) method, for example, in an extrusion process for manufacturing the optical body 16, which can be designed as a two-component extrusion. 2K stands for two components, i.e., two different plastics, so that a soft plastic suitable for the sealing function can be selected for the sealing area 42.

[0039] The optical body 16 has a central angle between the longitudinal side edges 17 with respect to the transverse direction Y. Figure 3 The optical body 16 has a central area 20 marked by a curved bracket. Furthermore, the optical body 16 has a side area 21 on each side of the central area 20 and between the longitudinal side edges 17. The optical body 16 has an inner surface 22 which, when the optics 5 are mounted, faces the interior of the support 14 and away from the surroundings 24 of the luminaire 1. The optical body 16 also has an outer surface 23 which faces away from the inner surface 22 and, when the optics 5 are mounted, faces away from the interior of the support 14 and towards the surroundings 24 of the luminaire 1.

[0040] The optical body 16 has a longitudinal lens 25 on its inner surface 22 in the central region 20 for introducing light into the optical body 16, extending in the longitudinal direction X. Furthermore, the optical body 16 has transverse prisms 26 on its outer surface 23 in the central region 20 for emitting light from the optical body 16, with the transverse prisms 26 being arranged consecutively in the longitudinal direction X and extending in the transverse direction Y. In contrast, the optical body 16 has longitudinal prisms 27 on its outer surface 23 in each of its two side regions 21 for emitting light from the optical body 16, with the longitudinal prisms 27 being arranged consecutively in the transverse direction Y and extending in the longitudinal direction X. While the transverse prisms 26 in the central area 20 produce a homogeneous light emission in the longitudinal direction X, the longitudinal prisms 27 in the side areas 21 each produce a homogeneous light emission in the transverse direction Y.

[0041] In the example shown here, the optical body 16 has a flat, plate-shaped base 28. The detent contours 18 project from this base 28 on the inner side 22. Alternatively, the detent contours 18 can also project from the base 28 on the outer side 23. The longitudinal lens 25, in any case, projects from the base 28 on the inner side 22 in the vertical direction Z. The longitudinal lens 25 has two longitudinal side walls 29 inclined towards each other, which begin on the inner side 22 between the transverse prisms 26 of the central region 20 and the longitudinal prisms 27 of the respective side region 21. The longitudinal side walls 29 end in the area of ​​the transverse prisms 26. Advantageously, the optics 5 or the optical body 16 is designed to be mirror-symmetric with respect to a plane of symmetry 30, which is spanned by the vertical direction Z and by the longitudinal direction X and which is arranged centrally with respect to the transverse direction Y.The longitudinal side walls 29 are inclined in cross-section relative to the vertical direction Z in a range of 30° to 60°, preferably in a range of 35° to 55°, and more preferably in a range of 40° to 50°. In the example shown, the longitudinal side walls 29 are inclined in cross-section by approximately 45° relative to the vertical direction Z.

[0042] In the examples shown here, the longitudinal lens 25 has a longitudinal groove 31 extending in the longitudinal direction X at its end furthest from the inner side 22. The longitudinal groove 31 is bounded laterally, i.e., in the transverse direction Y, by two opposing groove walls 32 and towards the inner side 22, i.e., in the vertical direction Z, by a groove base 33. A groove opening 43 is located opposite the groove base 33 in the vertical direction Z. At the end of the longitudinal lens 25 furthest from the inner side 22, i.e., at the groove opening 43, the groove walls 32 each transition into one of the longitudinal side walls 29, with the transition being rounded and forming an end contour 34, which will be described in more detail below. The groove base 33 can be convex towards the groove opening 43. In the examples shown here, the groove base 33 is prismatically shaped, such that it projects into the longitudinal groove 31 at an obtuse angle.

[0043] The optics 5 presented here are characterized in particular by the fact that the optical body 16 has a longitudinal notch 35 extending in the longitudinal direction X on both sides of the transverse prisms 26 on its outer surface 23 in the central region 20, which is configured for light reflection inside the optical body 16. This supports the light guidance within the optical body 16 from the longitudinal lens 25 to the side regions 21 and thus to the longitudinal prisms 27.

[0044] Each longitudinal groove 35 has an inner flank 36 facing the transverse prisms 26 and an outer flank 37 facing away from the transverse prisms 26. The inner flank 36 and outer flank 37 are inclined relative to each other such that the respective longitudinal groove 35 has a triangular cross-section with respect to the longitudinal direction X. The respective inner flank 36 is inclined relative to the transverse direction Y in a range of 70° to 110°, preferably in a range of 80° to 100°, and more preferably in a range of 85° to 95°. In the examples shown, the inner flank 36 is inclined at approximately 90° to the transverse direction Y and thus extends essentially parallel to the vertical direction Z. In contrast, the respective outer flank 37 is inclined to the transverse direction Y in a range of 30° to 60°, preferably in a range of 35° to 55°, more preferably in a range of 40° to 50°.In the examples shown, the respective outer flank 37 is inclined at approximately 45° to the transverse direction Y. Accordingly, in the examples shown here, the respective outer flank 37 extends essentially parallel to the adjacent longitudinal side wall 29 of the longitudinal lens 25.

[0045] The longitudinal lens 25 extends in the transverse direction Y, measured from the basic shape 28, approximately over 1 / 3 of the total width of the optical body 16. The two side regions 21 together extend in the transverse direction Y over more than 50% of the total extent of the optical body 16 in the transverse direction Y.

[0046] Advantageously, the optical body 16 can have a flat surface section 38 on its outer surface 23 in the transverse direction Y between the transverse prisms 26 and the longitudinal prisms 27, which is characterized by a flat outer surface or by a flat outer contour. The respective surface section 38 thus has no light-emitting contour or light-emitting structure, which improves the light transmission inside the optical body 16, in particular by reflection, from the longitudinal lens 25 to the longitudinal prisms 27.

[0047] According to Figure 1The luminaire 1 can also be equipped with at least one circuit board 39, which is arranged on or in the mounting bracket 5. Advantageously, the circuit board 39 is arranged in the interior of the mounting bracket 14 on the base 12 of the mounting bracket and held therein. The circuit board 39 carries a plurality of light-emitting elements 41, which are preferably light-emitting diodes. The light-emitting elements 41 are arranged one behind the other in the longitudinal direction X on the circuit board 39, so that they form a straight row. The arrangement of the light-emitting elements 41 and the circuit board 39 is such that the arrangement of the light-emitting elements 41 is adapted to the mounting bracket 4 and the optics 5 in such a way that the light-emitting elements 41 can illuminate the longitudinal lens 25, so that, during operation of the luminaire 1, the light emitted by the light-emitting elements 41 is fed into the optic body 16 via the longitudinal lens 25.

[0048] According to the Fig. 1 , 3 , 5, 6 , 8 and 10The optical body 16 can have a retaining rib 44 extending in the longitudinal direction X on its inner side 22 in each side region 21. This rib has a base region 45 connected to the optical body 16 and a freestanding retaining region 46 located away from the base region 45, projecting beyond the longitudinal lens 25 in the vertical direction Z of the optics 5. The retaining ribs 44 can be used, for example, to position the circuit board 39 and secure it to the device carrier 4. Due to their dimensions, the retaining ribs 44 project beyond the longitudinal lens 25 in the vertical direction Z. This prevents, for example, contact between the circuit board 39, and in particular the light-emitting elements 41, on the one hand, and the longitudinal lens 25 on the other. Fig. 1 , 5 and 6 A gap 40 is formed in the vertical direction Z between the longitudinal lens 25 and the circuit board 39.

[0049] To secure the circuit board 39, the retaining areas 46 of the retaining ribs 44 can laterally grip the circuit board 39 along its longitudinal edges. For this purpose, each retaining area 46 can have a support surface 47 and a collar 48 projecting from the support surface 47. The support surface 47 extends in the longitudinal direction X and in the transverse direction Y and serves to support the circuit board 39 in the vertical direction Z. The collars 48 provide lateral positioning or fixation of the circuit board 39 with respect to the transverse direction Y. Fig. 5 The circuit board 39 can thus be fixed to the optic 5, in order to attach the optic 5 with the circuit board 39 to the device carrier 4. The circuit board 39 is also fixed to the device carrier 4 by means of the locking connections 15 of the optic 5. In particular, it can be held under tension.

[0050] As can be seen in the examples shown here, the foot sections 45 of the two support platforms 44 have a greater distance from each other in the transverse direction Y than the support areas 46. For this purpose, the respective support platform 44 can have an arc or kink 49 between the foot section 45 and the support area 46.

[0051] In the example shown here, where the longitudinal lens 25 is equipped with the longitudinal groove 31, the light-emitting elements 41 are inserted into the longitudinal groove 31. Furthermore, it is provided that the optics 5 are supported on the circuit board 39 via the retaining lugs 44. In particular, it can be provided that the carrier body 10, the circuit board 39, and the optics 5 are aligned such that the optics 5, fixed to the carrier body 10, presses the circuit board 39 against the carrier base 12 with a preload. This achieves a predetermined relative position between the aforementioned components, thereby eliminating tolerance chains. This preload can be achieved, in particular, by elastic deformation of the retaining lugs 44, which is facilitated by their bend 49.

[0052] For a particularly simple implementation of this design, the transitions of the groove walls 32 into the longitudinal side walls 29 of the longitudinal lens 25 can be formed as end contours 34. These end contours 34 are rounded in cross-section in the longitudinal direction X and, in particular, are provided with a radius. With appropriate alignment with the retaining webs 44 on both sides of the light-emitting elements 41, the end contours 34 are spaced from the circuit board 39 to form the gap 40.

[0053] In the example shown here, the groove walls 32 are inclined in cross-section to the longitudinal direction X relative to the vertical direction Z in a range of 5° to 30°, preferably in a range of 10° to 20°, in particular of about 15°.

[0054] According to the Figures 7 to 11The luminaire 1 can be equipped with an end cap 50 that covers a longitudinal end 51 of the gear carrier 4 and the optics 5, the end cap 50 having a cap base 52 extending in the vertical direction Z and in the transverse direction Y and a cap collar 53 projecting therefrom in the longitudinal direction X. The cap collar 53 is positioned according to the Fig. 8 and 10In its assembled state, the end cap 50 abuts the support sides 11 of the device carrier 4 and the outer surface 23 of the optical body 16 from the outside. Furthermore, the end cap 50 may have a transverse web 54 projecting longitudinally X from the cap base 52, which, in its assembled state, rests against an outer surface or top surface of the support base 12 facing away from the interior of the carrier 14. Additionally, the end cap 50 may have a main support structure 55 projecting from the cap base 52 for each support side 11, which rests against the respective support side 11 and against an inner surface of the support base 12 facing the interior of the carrier 14.

[0055] During the Figs. 9 to 11In the illustrated embodiment, improved sealing is achieved by providing the end cap 50 with an additional support structure 56 for each main support structure 55, projecting from the cap base 52 in the longitudinal direction X. When the end cap 50 is mounted, this additional support structure 56 rests against the inner surface 22 of the optical body 16. Advantageously, the respective additional support structure 56 can be designed to rest against the inner surface 22 of the optical body 16 on both sides of the respective retaining rib 44, against the respective retaining rib 44, and against the longitudinal lens 25. For this bilateral contact with the respective retaining rib 44, the additional support structure 56 can have a gap 57 into which the retaining rib 44 axially penetrates when the end cap 50 is axially fitted.

[0056] Furthermore, the respective end cap 50 can have a locking lug 58 on the respective main support structure 55, which, in the mounted state of the end cap 50, engages or locks into a locking opening 59 formed in the carrier base 12 and thus secures the end cap 50 against axial removal from the device carrier 4.

[0057] During the Figs. 9 to 11 In the illustrated embodiment, the end cap 50 is also equipped with a further support structure 60 on the respective main support structure 55, which also rests on the inside of the respective support side 11 and provides additional support and sealing. When the device carrier 4 is assembled, this further support structure 60 is located inside the support profile 2.

Claims

1. Optics (5) for a lamp (1), in particular a strip of light (7) comprising multiple such lamps (1), - with a linear and elongated optical body (16) made of a light-conducting and translucent plastic, - wherein the optical body (16) has a locking contour (18) at its longitudinal side edges (17), which are facing away from each other, - wherein the optical body (16) has a central region (20) in the middle between the longitudinal side edges (17), - wherein the optical body (16) on both sides of the central region (20) and between the longitudinal side edges (17) has a respective side region (21), - wherein the optical body (16) has on its inside (22) in the central region (20) a longitudinal lens (25) for light supply, which extends in the longitudinal direction (X) of the optics (5), characterized in that, - the optical body (16) has transverse prisms (26) on its outer surface (23) facing away from the inside (22) in the central region (20) for light radiation, which follow one another in the longitudinal direction (X) of the optics (5), - the optical body (16) has on its outside (23) in the side regions (21) respective longitudinal prisms (27) for light radiation, which follow one another in the transverse direction (Y) of the optics (5), - the optical body (16) has a respective longitudinal notch (35) on its outside (23) in the central region (20) on both sides of the transverse prisms (26) for light reflection in the interior of the optical body (16).

2. Optics (5) according to claim 1, characterized in that - the optical body (16) has a flat, plate-shaped basic shape (28) from which the locking contours (18) on the outside (23) and / or on the inside (22) protrude and from which the longitudinal lens (25) protrudes on the inside (22).

3. Optics (5) according to claim 1 or 2, characterized in that - the longitudinal lens (25) has two longitudinal side walls (29) inclined to each other, which start on the inside (22) respectively between the transverse prisms (26) of the central region (20) and the longitudinal prisms (27) of the respective side region (21) and end in the region of the transverse prisms (26).

4. Optics (5) according to any one of claims 1 to 3, characterized in that - the longitudinal lens (25) has a longitudinal groove (31) at its end, which is at a distance from the inside (22), which is laterally bounded by two opposing groove walls (32) and toward the inside (22) by a groove base (33).

5. Optics (5) according to claims 3 and 4, characterized in that - the respective groove wall (32) at the groove opening (43) merges into the respective longitudinal side wall (29).

6. Optics (5) according to claim 4 or 5, characterized in that - the groove base (33) is convex or prismatic in the direction of the groove opening (43).

7. Optics (5) according to any one of the preceding claims, characterized in that - the respective longitudinal notch (35) has an inner flank (36) facing the transverse prisms (26) and an outer flank (37) facing away from the transverse prisms (26), - the respective inner flank (36) is inclined in relation to the transverse direction (Y) of the optics (5) in a range of 70° to 110°, preferably in a range of 80° to 100°, preferably in a range of 85° to 95°, in particular by 90°, - the respective outer flank (37) is inclined in relation to the transverse direction (Y) of the optics (5) in a range of 30° to 60°, preferably in a range of 35° to 55°, preferably in a range of 40° to 50°, in particular by 45°.

8. Optics (5) according to claims 3 and 7, characterized in that - the outer flank (37) of the respective longitudinal notch (35) extends parallel to the adjacent longitudinal side wall (29) of the longitudinal lens (25).

9. Optics (5) according to any one of the preceding claims, characterized in that - the optical body (16) has, on its inside (22), in each side region (21) a respective support bar (44) extending in the longitudinal direction (X), which has a foot region (45) connected to the optical body (16) and a holding region (46) at a distance from the foot portion (45), which protrudes in a vertical direction (Z) of the optics (5) beyond the longitudinal lens (25).

10. Optics (5) according to claim 9, characterized in that - the respective holding region (46) has a contact surface (47) and a collar (48) protruding from the contact surface (47).

11. Optics (5) according to claim 9 or 10, characterized in that - in the two support bars (44), the foot regions (45) have a greater distance in the transverse direction (Y) than the holding regions.

12. Lamp (1) for a strip of light (7) comprising multiple such lamps (1); - with a device support (4) having an elongated and linear support body (10) having two opposing support sides (11), a support bottom (12) connecting the support sides (13) and a support opening (13) opposite the support bottom (12), which is open to a support interior (14) limited by the support bottom (12) and the two support sides (11), - with at least one circuit board (39) arranged in the interior of the support (14) on the support bottom (12) and bearing a plurality of light-emitting elements (41) arranged one after the other in the longitudinal direction (X) of the lamp (1), - with at least one optics (5) according to any one of the preceding claims, which is fixed with their locking contours (18) on the support sides (11) and closes the support opening (13).

13. Lamp (1) according to claim 12, characterized in that - the optics (5) is supported by support bars (44) on the circuit board (39) in such a way that a gap (40) is formed between the circuit board (39) and the longitudinal lens (25).

14. Lamp (1) according to claim 12 or 13, characterized in that - the support body (10), the circuit board (39) and the optics (5) are adapted to each other so that the optics (5) fixed on the support body (10) presses the circuit board (39) against the support bottom (12).