Lighting equipment

Abstract

Lighting equipment, in particular motor vehicle lights, with at least one light source (11), and with a textile surface structure (13) to generate light effects, wherein the textile fabric (13) is connected to a holding means (12) for the textile fabric (13), characterized by the fact that the textile surface structure (13) is connected to the holding agent (12) in such a way that the textile surface structure (13) is firmly connected to the holding means (12) on at least one first side thereof, and that the textile surface structure (13) is connected to the holding means (12) in a spring-elastic manner on at least one second side (15) of the same, which is opposite the respective first side, and a prestress independent of the spring-elastic fastening is introduced into the textile surface structure (13).

Description

[0001] The invention relates to a lighting device according to the preamble of claim 1.

[0002] Motor vehicles have a variety of lighting devices, namely, on the one hand, lighting devices that serve to illuminate the interior of the vehicle or facilities associated with the interior of the vehicle, and on the other hand, lighting devices that serve to illuminate the area around the motor vehicle or to signal to other road users.

[0003] From EP 2 284 306 B1 a lighting device is known which has at least one light source and a textile surface structure for generating light effects, wherein the textile surface structure is connected to a frame-like holding means for the textile surface structure.

[0004] The textile fabric, which has a two-layered woven structure consisting of a warp and a weft layer, is stretched over a frame-like support. During operation, the textile fabric can relax, which can lead to the formation of waves or creases that negatively affect the light effect(s) produced by the fabric.

[0005] Furthermore, since the textile surface of the lighting device and its mounting element are made of different materials, they have different coefficients of thermal expansion. In extreme cases, the textile surface may contract at high temperatures, for example, while the mounting element of the lighting device continues to expand. This creates forces within the textile surface that can damage it and render it unsuitable for further lighting applications.

[0006] EP 0 503 705 A2 discloses a lighting device in which a textile surface structure is held taut on opposite sides by mechanical springs.

[0007] WO 2011 / 045 510 A1 and WO 2010 / 108 526 A1 reveal further state of the art.

[0008] Based on this, the present invention aims to create a novel lighting device. This objective is achieved by a lighting device according to claim 1. According to the invention, the textile surface is connected to the holding means in such a way that the textile surface is firmly connected to the holding means on at least one first side, and furthermore, the textile surface is resiliently connected to the holding means on at least one second side, which is opposite the respective first side.

[0009] Because the textile surface structure of the lighting device is firmly connected to the holding means on at least one side, and is spring-elastically connected to the holding means on at least one opposite side, the different thermal expansion behavior of the textile surface structure and the holding means can be compensated for over a large temperature range.

[0010] In particular, it is possible to avoid damage, distortion or waviness in the textile fabric due to different coefficients of thermal expansion of the fabric and the holding agent in the temperature range typical for automotive applications between -40 °C and +110 °C.

[0011] Preferably, the textile fabric of the lighting device is firmly attached to the holding means on a single first side, wherein the textile fabric is resiliently attached to the holding means on a single second side opposite the first side, and wherein the textile fabric is not attached to the holding means on the sides extending between the first and second sides. It is particularly preferred that the textile fabric is attached to the holding means exclusively on two opposite sides, namely firmly on one side and resiliently on the opposite side. This attachment is then made either to the weft threads or to the warp threads of the textile fabric, which then extend between the first and opposite sides.

[0012] According to the invention, a prestress independent of the spring-elastic fastening is introduced into the textile fabric. This prestress acts independently of the spring-elastic fastening. This counteracts any potential loosening of the textile fabric due to aging.

[0013] Preferably, the textile surface is directly and firmly connected to the holding means on its first side, while on its second side, the textile surface is connected to the holding means either directly or indirectly via a spring element in a resilient manner. This embodiment of the invention is simple and therefore preferred.

[0014] According to an advantageous embodiment of the invention, the textile surface structure is deflected adjacent to the second side between the holding element and the spring element, such that forces applied to the textile surface structure via the spring element and a light-emitting surface defined by the holding element form an angle. This design requires little installation space and is particularly advantageous from an aesthetic point of view. Preferably, a rolling element guides the textile surface structure in the area of ​​deflection.

[0015] Preferred embodiments of the invention are described in the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail with reference to the drawing, without being limited thereto. The drawing shows: Fig. 1 a detail of a first lighting device according to the invention in perspective view; Fig. 2 the detail of Fig. 1 in side view; Fig. 3 a detail of a second lighting device according to the invention in perspective view; Fig. 4 the detail of Fig. 3 in side view; Fig. 5 a detail of a third lighting device according to the invention in perspective view; Fig. 6 the detail of Fig. 5 in side view; Fig. 7 a detail of a fourth lighting device according to the invention in perspective view; Fig. 8 the detail of the Fig. 3 in side view; Fig. 9 the detail of the Fig. 3 in bottom view; Fig. 10 another detail of a lighting device according to the invention.

[0016] The invention relates to a lighting device, in particular a lamp of a motor vehicle.

[0017] Fig. 1 and Fig. Figure 2 shows schematic details of a lighting device 10 according to a first embodiment of the invention. The lighting device 10 of the Fig. 1 and Fig. 2 has at least one light source 11, which serves to emit light. The lighting device 10 further has a textile surface 13 for generating light effects, wherein the textile surface 13 is connected to a holding element 12. The textile surface 13, which serves to generate light effects, preferably has a two-layer woven structure, consisting of warp threads forming a warp layer and weft threads forming a weft layer lying on one side of the warp layer. Warp threads and weft threads can be connected to each other by binding threads. Such a textile surface for generating light effects is known from EP 2 284 306 B1.

[0018] The retaining element 12 preferably provides a light-emitting surface 14 for the light emitted by the light source 11. The textile surface 13 is connected to the retaining element 12 providing the light-emitting surface 14 in such a way that the light-emitting surface 14 is at least partially covered by the textile surface 13.

[0019] The textile surface structure 13 is connected to the holding means 12 in such a way that the textile surface structure 13 is firmly connected to the holding means 12 on at least one first side (not shown) of the same, and that furthermore the textile surface structure 13 is spring-elastically connected to the holding means 12 on at least one second side 15 of the same, which is opposite the respective first side.

[0020] In Fig. 1 and Fig. 2 The textile surface structure 13 has an elongated, strip-like shape, with the opposite sides, where the textile surface structure 13 is connected to the holding means 12, extending into Fig. 1 and Fig. 2 only the side 15 of the textile surface structure 13 is shown, to which it is connected to the holding means 12 in a spring-elastic manner.

[0021] In the exemplary embodiment of the Fig. 1 and Fig. 2 The holding element 12 for the textile surface structure 13 is composed of two sub-elements 12a, 12b, which are connected to each other at two parallel legs 16, 17. The leg 16 of sub-element 12a of the holding element 12, which is connected to the leg 17 of sub-element 12b of the holding element 12, is angled relative to a section 18 of sub-element 12a of the holding element 12 which provides the light-emitting surface 14.

[0022] Angled sections 19, 20 are attached to the leg 17 of the sub-element 12b of the holding means 12, which together with the leg 16 of the sub-element 12a define a receiving space 21.

[0023] As already explained, this is in Fig. 1 and Fig. Two strip-like, textile surface structures are connected to the holding means 12 on side 15 in a spring-elastic manner, namely via a spring element 22. The spring element 22 is arranged in the receiving space 21 defined by the sub-elements 12a, 12b of the holding means 12 and is connected to the holding means 12.

[0024] In the illustrated embodiment, the spring element 22 has the following features: Fig. 1 and Fig. 2 via two sections, namely a fastening section 23 for the textile fabric 13 and a spring section 24. The textile fabric 13 is connected with its side 15 to the fastening section 23 of the spring element 22, namely via a clamping element 25, by means of which the textile fabric 13 is fastened with its side 15 to the fastening section 23 of the spring element 22. The spring section 24 of the spring element 22 is connected between the fastening section 23 of the spring element 22 and the holding element 12, so that spring forces provided by the spring section 24 of the spring element 22 are introduced into the textile fabric 13 via the fastening section 23 of the spring element 22. The spring section 24 of the spring element 22 is connected to the holding element 12.On the side opposite side 15 (not shown) of the textile surface structure 13, it is firmly and therefore not spring-elastically connected to the holding means 12 of the lighting device 10, for example by the fact that the textile surface structure is detachably connected to the holding means 12 on this side via a clamping element or is indetachably connected by, for example, ultrasonic welding or gluing.

[0025] In the Fig. 1 and Fig. In the embodiment shown in Figure 2, the textile surface structure 13 can also be permanently connected to the fastening section 23 of the spring element 22, for example by ultrasonic welding or gluing, in the area of ​​its side 15, where it is connected to the holding means 12 in a spring-elastic manner.

[0026] In Fig. 1 and Fig. 2. The textile surface structure 13 of the lighting device is fixedly connected to the holding means 12 at a single first side, and is resiliently connected to the holding means 12 at a single second side 15, opposite the first side. The textile surface structure 13 is not connected to the holding means 12 between the first and second sides 28, but is guided on a preferably convex surface of the holding means 12 to prevent vibrations.

[0027] In this case, the textile surface structure 13 of the lighting device is connected to the holding means 12 either via the warp threads of the warp thread layer or the weft threads of the weft thread layer.

[0028] Fig. 3 and Fig. Figure 4 shows details of a second lighting device 10 according to the invention, which, with regard to its basic structure, is similar to the lighting device of the Fig. 1 and Fig. 2 corresponds, and which differs from the lighting device of the Fig. 1 and Fig. 2 differs only in that in the exemplary embodiment of the Fig. 3 and Fig. 4 the holding means 12 is formed in one piece, i.e. not as in the embodiment of the Fig. 1 and Fig. 2 is composed of the two sub-elements 12a and 12b.

[0029] Rather, a groove is formed in the edge area of ​​the retaining means 12, which defines the receiving space 21 in which the spring element 22 is received, via which the side 15 of the textile surface structure 13 is indirectly connected to the retaining means 12 in a spring-elastic manner.

[0030] As already explained above, the textile fabric has a weft layer and a warp layer, wherein the warp threads of the warp layer and the weft threads of the weft layer are preferably connected to each other by binding threads. Then, when as in Fig. 1 and Fig. 2 as well as Fig. 3 and Fig. As shown in Figure 4, such a textile surface structure 13 is connected to the holding means 12 on only two opposite sides, namely firmly on one side and spring-elastic on the opposite side, either the warp threads of the warp thread layer or the weft threads of the weft thread layer are connected to the holding means 12 on the opposite sides of the textile surface structure 13 in this way.

[0031] In the exemplary embodiments of the Fig. 1, Fig. 2 as well as Fig. 3, Fig. 4 is the spring force provided by the spring element 22 to compensate, for example, for the different thermal expansion behavior of the holding element 12 and the textile surface structure 13 of the lighting device, directed parallel to the light emission surface 14 of the holding means 12 of the lighting device.

[0032] In contrast, they Fig. 5 and Fig. 6 an embodiment of a lighting device 10 according to the invention, in which the textile surface structure 13 is deflected at least in the area of ​​the side 15 which is spring-elastically attached to the holding means 12.

[0033] According to Fig. 5 and Fig. In Figure 6, the textile surface 13 adjacent to the second side 15, which is elastically attached to the holding means 12 via the spring element 22, is deflected relative to that section of the textile surface 13 which at least partially covers the light-emitting surface 14 of the holding means 12. Thus, the forces provided by the spring element 22, which serve in particular to compensate for differing thermal expansion behavior between the holding means 12 and the textile surface 13, and the light-emitting surface 14 of the holding means 12 form an angle which, in the exemplary embodiment, is 90°. This angle of 90° is purely exemplary. This angle can be between 10° and 170°.

[0034] This deflection of the textile surface structure 13 to Fig. 5 and Fig. 6 has the advantage that the spring-elastic fastening is guided into the depth and little installation space is required laterally next to the holding element 12.

[0035] Regarding other details, the exemplary embodiment of the Fig. 5, Fig. 6 with the embodiment of the Fig. 1, Fig. 2 agree, in the exemplary embodiment of the Fig. 5, Fig. 6 is therefore the holding element 12 formed by two sub-elements 12a and 12b, which are connected to each other at legs 16 and 17.

[0036] In the exemplary embodiment of the Fig. 5 and Fig. 6, in which the textile surface structure 13 is deflected in the area of ​​or adjacent to the side 15, on which it is spring-elastically attached to the holding means 12, the textile surface structure 13 is preferably guided in the area of ​​the deflection via a rolling element 26 rotatably mounted on the holding means 12, in order to avoid wear of the textile surface structure 13 when it is tensioned or contracted as a result of the force provided by the spring element 22.

[0037] As already explained above, in the exemplary embodiments of the Fig. 1, Fig. 2, and Fig. 3, Fig. 4 and Fig. 5, Fig. 6. The textile surface structure 13, in the area of ​​side 15, which is resiliently attached to the holding element 12, is fastened to the spring element 22 via a clamping element 25, namely to the fastening section 23 of the respective spring element 22. In the exemplary embodiments of the Fig. 1, Fig. 2, and Fig. 3, Fig. 4 and Fig. 5, Fig. 6 this fastening by introducing a prestress into the textile surface structure 13.

[0038] A prestress independent of the spring-elastic fastening can be particularly advantageously introduced into the textile surface structure 13 if the same is pressed against the in the area of ​​its side 15. Fig. 10. The manner shown is via a clamping element 25 on the in Fig. 10. The spring element 22, which is not shown for the sake of simplicity, is attached.

[0039] The clamping element 25 then has a projection 27 which, in a meandering motion, presses the textile surface structure 13 in the area of ​​its side 15 to be tensioned into a corresponding recess in the fastening section 23 of the spring element 22, thereby providing the desired pretension in the textile surface structure 13. This pretension acts independently of the spring element 22.

[0040] Another embodiment of a lighting device 10 according to the invention is shown. Fig. 7 to 9. So they are in Fig. Figures 7 to 9 show the holding element 12 and the textile surface structure 13 of the lighting device 10, with the light source 11 positioned below the holding element 12.

[0041] The side 15 of the textile surface structure 13 is shown which is spring-elastically connected to the holding means 12, wherein in the illustrated embodiment the Fig. Figures 7 to 9 show that the spring element 22, which serves to elastically connect side 15 of the textile fabric 13 to the retaining element 12, is an integral part of the retaining element 12. Therefore, side 15 of the textile fabric 13, which is elastically attached to the retaining element 12, is directly attached to the retaining element 12, namely via the integral spring element 22.

[0042] The spring element 22 in turn has a spring section 24 and a fastening section 23 for the corresponding side 15 of the textile surface structure 13, wherein in the exemplary embodiment the Fig. 7 to 9, the spring section 24 of the spring element 22 is positioned between the retaining means 12 and the fastening section 23 of the spring element 22. The textile surface structure 13 is connected to the fastening section 23 of the spring element 22 in Fig. 7 to 9 by gluing or ultrasonic welding or the in Fig. 10 clamp connections shown.

[0043] The textile surface structure 13 is not connected to the spring section 24.

[0044] The spring section 24 is formed by meandering or bellows-like contoured or corrugated sections of the retaining element 12, which run between the section of the retaining element 12 providing the light emission surface 14 and the fastening section 23 of the spring element 22, which, as already explained, in the exemplary embodiment of the Fig. 7 to 9 is an integral part of the holding element 12.

[0045] The spring section 24 and / or the fastening section 23 of the spring element 22 are in the exemplary embodiment of the Fig. 7 to 9 preferably guided via a longitudinal guide to ensure a defined deformation of the spring element 22 and to avoid tilting.

[0046] It is therefore in the sense of the present invention to propose a lighting device 10 of a motor vehicle which has a textile surface structure 13 and a holding means 12 for the textile surface structure 13, wherein the textile surface structure 13 is preferably fixed to the holding means 12 on one side and spring-elastically connected to the holding means 12 on one opposite side, either indirectly or directly.

[0047] Then, if the side of the textile fabric 13 to be attached to the holding element 12 in a spring-elastic manner is relatively long, several spring elements 22 are positioned and used along this side to attach the respective side 15 of the textile fabric 13 to the holding element 12 in a spring-elastic manner.

[0048] Although not preferred, it is also possible to attach a textile surface structure 13 firmly on two sides and spring-elastically on two sides opposite these sides to a holding means 12.

[0049] In all embodiments, the textile surface structure 13 is attached to the spring element 22, namely to the fastening section 23 thereof, via the respective clamping element 25 or by gluing or ultrasonic welding or the like, not at points but in a linear fashion, in order to introduce the force provided by the spring element 22 uniformly into the textile surface structure 13.

[0050] The spring elements 22 can be made of metal or plastic. Then, if the spring element 22 is as in the exemplary embodiment of the Fig.Since the retaining element 12 is an integral part of the retaining element 12 (7 to 9), both the retaining element 12 and the spring element 22 are preferably made of plastic. In the other embodiments, the respective retaining element 12 can be made of plastic and the respective spring element 22 can be made of metal or plastic.

Claims

[1] Lighting device, in particular motor vehicle lamp, with at least one light source (11), and with a textile surface structure (13) to generate light effects, wherein the textile fabric (13) is connected to a holding means (12) for the textile fabric (13), characterized by , that the textile surface structure (13) is connected to the holding agent (12) in such a way that the textile surface structure (13) is firmly connected to the holding means (12) on at least one first side thereof, and that the textile surface structure (13) is connected to the holding means (12) in a spring-elastic manner on at least one second side (15) of the same, which is opposite the respective first side, and a prestress independent of the spring-elastic fastening is introduced into the textile surface structure (13). [2] Lighting device according to claim 1, characterized by , that the textile structure (13) is firmly connected to the holding means (12) on a single first side of the same, and that the textile structure (13) is resiliently connected to the holding means (12) on a single second side (15) of the same, which is opposite the first side, and that the textile structure (13) is not connected to the holding means (12) on the sides (28) extending between the first side and the second side (15). [3] Lighting device according to claim 2, characterized by , that the textile fabric (13) has a multi-layered woven structure consisting of a warp layer and a weft layer, wherein warp threads or weft threads extend between the first side and the second side of the textile fabric (13) such that either the warp threads or the weft threads are connected to the holding means (12) in the area of ​​the first side and the second side. [4] Lighting device according to any one of claims 1 to 3, characterized by , that the textile surface structure (13) is directly and firmly connected to the holding means (12) on its respective first side. [5] Lighting device according to any one of claims 1 to 3, characterized by , that the textile surface structure (13) is indirectly and firmly connected to the holding means (12) via a clamping element on its respective first side. [6] Lighting device according to any one of claims 1 to 5, characterized by , that the textile surface structure (13) is indirectly connected to the holding means (12) via a spring element (22) on the respective second side (15) of the same in a spring-elastic manner. [7] Lighting device according to any one of claims 1 to 5, characterized by, that the textile surface structure (13) is connected to the holding means (12) directly via a spring element (22) on the respective second side (15) thereof in a spring-elastic manner, wherein the spring element (22) is an integral part of the holding means (12). [8] Lighting device according to claim 6 or 7, characterized by , that the textile surface structure (13) is deflected in the area of ​​the respective second side (15) between the holding means (12) and the spring element (22) in such a way that forces applied to the textile surface structure (13) via the spring element (22) and a light emission surface (14) defined by the holding means (12) enclose an angle. [9] Lighting device according to claim 8, characterized by that this angle is between 10° and 170°. [10] Lighting device according to claim 8 or 9, characterized by , that a rolling element (26) guides the textile surface structure (13) in the area of ​​deflection.

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