CN112739565B

CN112739565B - Roof with light conductor lighting element

Info

Publication number: CN112739565B
Application number: CN201980061457.4A
Authority: CN
Inventors: J·格罗特
Original assignee: Webasto SE
Current assignee: Webasto SE
Priority date: 2018-09-20
Filing date: 2019-09-05
Publication date: 2024-05-28
Anticipated expiration: 2039-09-05
Also published as: WO2020057996A1; DE102018123196A1; DE102018123196B4; CN112739565A

Abstract

The invention relates to a vehicle roof (10) having a lighting element (12) for illuminating a vehicle interior (14), wherein the lighting element (12) is designed as a light guide or a light-emitting diode strip. According to the invention, the lighting element (12) is surrounded on at least one section by an opaque, tubular or tubular light shielding element (16, 18; 20). Alternatively, the lighting element (12) is U-shaped in a plane parallel to the vehicle roof, having two parallel side sections (22, 24) arranged in the longitudinal direction of the vehicle, and a base (26) which is arranged transversely to the side sections and connects the side sections. The light shielding element surrounds the lighting element in the region of the base, and a light source having an LED or an LED module (28) is arranged at an end (30) of the side section (22) facing away from the base (26), and is designed for coupling light into the light guide.

Description

Roof with light conductor lighting element

Technical Field

The invention relates to a vehicle roof having a lighting element for illuminating a vehicle interior, wherein the lighting element is embodied as a light guide or alternatively as a light-emitting diode strip.

Background

A roof according to the prior art is known from DE 10 2016 101 873 B4. In this document, a lighting element is disclosed, which is designed as a light guide. The vehicle roof has a roof opening with two guide rails for guiding a movable shielding element for shielding the roof opening, wherein the shielding element is a roller blind web and the guide rails comprise a receiving portion in which the lighting element is arranged. Here, the light guide body for illuminating the vehicle interior space may be arranged in a rectangular shape around the top opening.

A disadvantage of this known system is that each lighting element is configured in a coherent light-emitting manner, so that individual lighting elements are also provided for the construction of the individual light-emitting sections. This limits the configuration possibilities of the ambient lighting and is structurally complex and costly in embodiments with a plurality of individual lighting elements. In addition, more installation space is required when installing a plurality of individual lighting elements.

Disclosure of Invention

The object of the present invention is to provide a vehicle roof which overcomes these disadvantages of the known systems.

This object is achieved by a vehicle roof according to the features of one embodiment of the invention and by a vehicle roof according to the features of another embodiment of the invention.

In a vehicle roof according to the invention, the lighting element is surrounded in sections by at least one opaque, hose-shaped or tubular light-shielding element.

Herein, "opaque" is understood to mean a measure of the light transmission of a tubular or tubular shading element. The light transmission or transmittance may be reduced, or the light shielding element may be configured such that no further transmission of visible light occurs in the region of the light shielding element.

Since the illumination element is surrounded in sections by the shading element, ambient illumination can be achieved relatively simply in that selected sections of the illumination element are shaded, whereas the overall brightness of the illumination element can be provided in areas not surrounded by the shading element. In particular, a plurality of individual light emitting areas can be realized with only one lighting element without having to install a plurality of individual lighting elements. In the case of the use of a light guide, a coherent light guide can therefore be installed, which is illuminated by means of a single light source. In case a light emitting diode bar is used, a coherent light emitting diode bar may be used instead of a separate section, whereby electrical energy only needs to be fed into the light emitting diode bar at one point. On the one hand, this results in low-cost production of the vehicle roof. On the other hand, since only one light source or one energy source has to be coupled in the case of a light emitting diode bar, a reduction of the installation space required for illumination is achieved.

In a further embodiment of the vehicle roof according to the invention, the lighting element is embodied as a light guide body and is configured U-shaped in a plane parallel to the vehicle roof with two parallel side sections arranged in the longitudinal direction of the vehicle and a base section which is arranged transversely to the side sections and connects the side sections. The light shielding element encloses the lighting element in the region of the base, wherein a (preferably exclusively) light source with LEDs or LED modules is arranged on the end of the side section facing away from the base, and the light source is designed for coupling light into the light guide.

The advantage here also arises that a plurality of individual light-emitting regions can be realized with only one lighting element, as a result of which the system costs and the installation space required for the lighting are reduced.

The preferred configuration of the present invention is derived from a further technical solution of the present invention.

Preferably, the light shielding element has a transmission of less than 50%, in particular less than 10%, and in a particularly preferred embodiment the light shielding element does not allow transmission of visible light from the lighting element into the vehicle interior space. Thus, the illumination of the vehicle interior space may be reduced in a specific section, or the illumination element may also be completely obscured in a section surrounded by the shading element.

In a further preferred embodiment of the invention, the lighting element is U-shaped in the plane of the vehicle roof with two parallel edge sections arranged in the longitudinal direction of the vehicle. The side sections are connected by a base which is arranged transversely to the side sections. The light-shielding element can here enclose the lighting element in the region of the base part, so that, as seen from the vehicle interior, the impression of two individual linear lighting elements is created, even though only a single lighting element actually has to be provided.

In a particularly preferred embodiment of the invention, the shading element is configured as a shrink hose which is shrunk onto the lighting element in sections. This provides a particularly simple and cost-effective adaptation to the illumination situation.

For the case of a light guide arranged as a lighting element, it is preferred to arrange one (or more) LEDs or LED modules as light sources in order to couple light into the light guide. In the U-shaped configuration of the lighting element, the LEDs or LED modules are arranged on the end of the side section facing away from the base and are configured for coupling light into the light guide. For this purpose, for example, an in-coupling lens may be provided.

Preferably, in addition to the shading elements on the base, i.e. at the centre of the light guide, further shading elements may be provided on both ends of the lighting element. In this case, it is preferable to provide a light shielding element in the region of the end at which the light from the LED or LED module is coupled into the lighting element in the form of a light guide. In the embodiment with the led strip, the shading element is correspondingly arranged at the end of the lighting element at which the electrical energy is coupled into the lighting element. Thus, this area can be mechanically protected and optically covered. On the opposite end of the illumination element, a further shading element is also used in embodiments with a light guide to suppress radiation from the light guide in the longitudinal direction.

In embodiments in which the illumination element is embodied as a light guide, the light guide is preferably configured such that light coupled into the light guide emerges laterally from the light guide, wherein the coupling-out can be influenced. This is preferably achieved by providing structures on the surface of the light guide, which may be embodied, for example, as surface roughness and scatter or couple light out laterally from the light guide.

When the light guide is provided, it is preferably constructed in one piece and is embodied flexibly, so that it can be bent in the desired shape, for example in the aforementioned U-shape, and arranged on the roof. Thus, commercially available light guides can be simply matched to different shapes and sizes.

In a further particularly preferred embodiment of the invention, the roof has: a top opening; and two guide rails for guiding a movable shielding member for shielding the top opening; and a displaceably supported cover for selectively opening and closing the top opening. The cover can be embodied at least partially transparent. Furthermore, it is alternatively possible to close the top opening by means of a fixedly mounted transparent cover and to implement only a shielding element for shielding the top opening to be displaceable. In this case, each guide rail preferably comprises a receptacle in which the lighting element is arranged.

In this embodiment of the roof with a roof opening, a roof ceiling is preferably provided on the inside of the roof, which ends with a ceiling edge at the edge of the roof opening, and the receptacle for the lighting element is arranged in the region of this ceiling edge. This provides the advantage that a comfortable ambient lighting is achieved along the entire edge of the top opening or along a specific section of the edge.

The shielding element is preferably a roller blind web, and the side edge regions of the roller blind web are deflected in a deflection region of a guide rail which at the same time forms a receptacle for the illumination element. In this case, it is preferably provided that the edge region of the roller blind web is deflected by the deflection region, starting from an orientation parallel to the vehicle roof, first downwards and then inwards parallel to the vehicle roof toward the roof opening. A deflection of 120 ° to 220 °, particularly preferably 180 °, of the edge region of the roller blind web is thus produced.

The receptacle for the lighting element is preferably configured substantially U-shaped and/or as a recess, having an opening which is oriented substantially horizontally in the direction of the top opening. This provides the advantage that the edge region of the roller blind web can be turned around the convex outer surface of the receiving portion and that the receiving portion also concavely encloses the lighting element, wherein the opening of the receiving portion enables light to radiate horizontally from the lighting element in the direction of the top opening. Thus, the shielding element may be illuminated from below, which results in a comfortable and non-glare indirect illumination. Advantageously, the receiving portion for the illumination element also constitutes a turning portion for the roller shutter web.

In one embodiment of the roof with the roof opening, a frame can be provided which surrounds the roof opening rectangularly and is formed at least in part by two lateral guide rails and a frame front part oriented in the vehicle transverse direction and a frame rear part oriented in the vehicle transverse direction. In this case, a U-shaped illumination element can be provided, which has two parallel edge sections, which are arranged on two lateral rails, and a base, which is arranged on the frame front or the frame rear. A particularly preferred configuration of the invention results if the lighting element is shaded by shading elements in the region of the base (i.e. on the frame front part or the frame rear part). A particularly comfortable illumination situation is thus achieved, which makes it possible for the two light-emitting areas to be seen laterally along the roof opening, as seen from the vehicle interior, while the lighting element is shaded in its area transverse to the vehicle longitudinal direction.

Drawings

The invention is illustrated in the following by way of example with reference to the accompanying drawings. Here, it is shown that:

fig. 1 is a top view from above of a frame for a vehicle roof according to the invention;

FIG. 2 is a cross-section of a side rail installed in a vehicle roof; and

Fig. 3 is an enlarged detail of a cross section of the guide rail of fig. 2 with a receptacle for a lighting element.

Detailed Description

Fig. 1 shows a top view of a frame 50 of a roof module, which in the installed state encloses a roof opening 34 of a roof, not shown.

The frame 50 has two guide rails 36 which are arranged laterally in the longitudinal direction of the vehicle beside the top opening 34. Further, the frame 50 is constituted by a frame front portion 52 and a frame rear portion 54, so that the guide rail 36, the frame front portion 52, and the frame rear portion 54 constitute a rectangular frame shape.

On the frame 50, a lighting element 12 is arranged, which has a continuous light guide into which the light of the LED modules 28 is coupled. The lighting element 12 is U-shaped with two side sections 22 and 24 and a base 26 connecting the two side sections 22 and 24. Light incoupling from the LED module 28 into the lighting element 12 is effected at the end 30 of the side section 22 facing away from the base 26.

The lighting element 12 is surrounded by three opaque, hose-shaped shading elements 16, 18, 20 in different sections. The opaque light-blocking elements 16, 18, 20 are preferably completely impermeable to visible light. In the configuration according to fig. 1, the illumination element 12 is surrounded by the shading element 16 in the region of the base 26. The shading element 16 is configured as a shrink hose and is shrunk onto the lighting element 12, which results in a particularly simple and cost-effective implementation of the partial shading of the lighting element 12.

Further shading elements 18 and 20 are provided, by means of which the lighting element 12 is arranged on both ends 30 and 32 of the lighting element, i.e. on the ends of the side sections 22 and 24 facing away from the base 26. Thus, in the region of the LED module 28, a section of the lighting element 12 can be covered in which the light of the LED module 28 is coupled into the lighting element 12. Thus, undesired radiation out of light from the lighting element 12 can be prevented in the coupling-in region. At the end 32 of the opposite side section 24 of the lighting element 12 facing away from the LED module 28, the further light shielding element 20 prevents light from being coupled out of the lighting element 12 in the longitudinal direction of the side section 24. It is thus ensured that the light is emitted only laterally from the lighting element 12.

Lateral coupling-out of light from the light guide of the lighting element 12 can be adjusted by targeted roughening of the surface of the light guide. For example, the light guide may have PMMA fibers surrounded by a transparent hose cover, and the PMMA fibers have a surface structure in order to couple light out of these fibers configured as light guides.

The frame 50 of fig. 1 surrounds the top opening 34 in the roof 10 in the installed state (see fig. 2) and also with its guide rails 36 serves for guiding the displaceable cover 66 shown in fig. 2in order to optionally open and close the top opening 34. For this purpose, the guide rail 36 has guide channels 68 by means of which the cover is movably supported. Furthermore, receptacles 38 for the illumination elements 12 are provided on the guide rails 36, which receptacles are described in detail with reference to further fig. 3.

In fig. 2, a section of the frame of fig. 1 in the mounted state into the roof 10 is shown enlarged. Correspondingly, the cross section extends through the left rail 36 of fig. 1, which extends in the longitudinal direction of the vehicle. The guide channel 70 is provided as a drive cable for the schematically shown cover 66. The receiving portion 38 is for receiving the illumination element 12 configured as a light guide. The receiving portion 38 is again shown enlarged in fig. 3 and has an upper section 56 which is oriented substantially horizontally and a lower section 58 which is also oriented substantially horizontally. The two sections 56 and 58 are connected to each other by a connecting section 60 on the side facing away from the top opening 34. The connecting section 60 is disposed at an angle of about 45 ° relative to the lower section 58. Generally, a U-shaped or V-shaped cross-section may be provided in a manner formed by the two sections 56 and 58 and the connecting section 60. Overall, the receiving portion 38 is thus configured with a first recess 64 receiving the lighting element 12. To retain the lighting element 52 in the first recess 64, one of the sections 56 and 58 has a projection 62 (or both sections have such a projection), which in the embodiment of fig. 3 is arranged on the lower section 58 of the receptacle 38. By means of this projection 62, the light guide of the lighting element 12 can be clamped simply between the upper section 56 and the lower section 58 in the first recess 64 of the receptacle 38.

Since the recess 64 of the receiving portion 38 constitutes an opening towards the centre of the top opening, light emitted sideways from the lighting element 12 radiates only substantially in this direction. Thus, undesired downward radiation into the vehicle interior space 14 is prevented and the occurrence of glare is avoided. Also, upward radiation in the vertical direction is prevented.

As shown in fig. 2, a shielding element in the form of a roller blind web 44 is schematically shown provided in order to shield the top opening 34 of fig. 1 from solar radiation. A displaceable transparent cover 66 is used to close the top opening 34. To tension the roller blind web 44 transversely to the pull-out direction and thus transversely to the vehicle longitudinal direction, the edge region 46 of the roller blind web 44 is turned approximately 180 ° around the turning region 48 of the guide rail 36. The turning of the edge area 46 is first done downwards and then back in the horizontal direction towards the centre of the top opening 34. In order that the edge region 46 of the roller blind web 44 does not slide back around the deflection region 48, the edge region 46 is embodied in a section and guided displaceably in a second recess 72 of the guide rail 36 provided for this purpose and is fixed in the transverse direction of the vehicle.

The convex outer surface of the receiving portion 38 constitutes a steering region 48 of the guide rail 36, and the concave inner side of the receiving portion 38 receives the lighting element 12. Since the receptacle 38 receives the lighting element 12 at its concave inner surface and forms the steering region 48 with its convex outer surface, both functions are achieved by the unique profile section of the guide rail 36. Thus, the provision of a separate receptacle for the illumination element 12 or a separate turning region for the edge region 46 of the roller blind web 44 is dispensed with, so that the structure of the vehicle roof 10 is simplified. Preferably, the entire profile of the rail 36 is extruded (extruded) and is made of aluminum.

Below the guide rail 36 in fig. 2, a top ceiling 40 is provided which, seen from above the vehicle interior 14, covers the components situated above it (for example the guide rail 36 with the receiving portion 38 and the edge region 46 of the roller blind web 44) in order to improve the appearance. The top ceiling 40 ends in the region of the top opening 34 at a ceiling edge 42 approximately at the level of the lower section 58 of the receptacle 38. It is thus ensured that light radiated from the lighting element 12 between the lower section 58 and the upper section 56 of the receiving portion 38 in a substantially horizontal direction in the direction of the top opening 34 can radiate over the top ceiling 40 and in particular the ceiling edge 42 along the underside of the roller blind web 44. Thus, the rolling slats 44 are indirectly illuminated from below, as seen from the vehicle interior space 14 upwards, which provides particularly comfortable ambient lighting. The upper section 56, the lower section 58 and the connecting section 60 of the receiving portion 38 delimit the illumination element 12 from radiation in a narrow angular range by a first recess 64 formed by them and an opening of the recess associated with the center of the top opening 34.

Thus, the vehicle roof according to the invention results in a simple and low-cost production of the vehicle roof and in a particularly pleasant lighting situation, compared to known vehicle roofs. If the sectional positioning of the shading elements 16, 18 and 20 of fig. 1 is considered, the indirect illumination in the roof region takes place, seen from the inside, at the two side regions of the top opening 34, while the regions at the frame front part 52 and the frame rear part 54 remain unlit. This can be achieved even though only a single, continuous lighting element 12 in the form of a light guide is provided for simplifying the structure of the vehicle roof 10 and only a single LED module 28 is provided in connection therewith.

List of reference numerals

10 Roof

12 Lighting element

14 Vehicle interior space

16 Shading element

18 Shading element

20 Shading element

22 12 Edge section

24 12 Edge section

26 Base

28LED module

30 22 End of the frame

32 22 End of the frame

34 Top opening

36 Guide rail

38 Receiving portion

40 Roof ceiling

42 Ceiling edge

44 Roller shutter web

46 44 In the edge region of the base

48 36 Steering region of the steering wheel

50 Frame

52 Front part of frame

54 Rear part of the frame

56 38, An upper section of

58 38, Lower section of

60 Connection section

62 Projection

64 Groove

66 Cover

68 Guide channels

70 Guide channel

72 Groove

Claims

1. A vehicle roof (10) having a lighting element (12) for illuminating a vehicle interior (14), wherein the lighting element (12) is designed as a light guide or a light-emitting diode strip, characterized in that the lighting element (12) is surrounded on at least one section by an opaque, hose-shaped or tube-shaped light-shielding element, wherein the light-shielding element is designed as a shrink hose which is shrunk onto the lighting element (12).

2. A vehicle roof (10) having a lighting element (12) for illuminating a vehicle interior (14), wherein the lighting element (12) is designed as a light guide, characterized in that the lighting element (12) is designed in a U-shape in a plane parallel to the vehicle roof as having two parallel side sections (22, 24) arranged in the longitudinal direction of the vehicle and a base (26) which is arranged transversely to the side sections and connects the side sections, and a light shielding element (16) surrounds the lighting element (12) in the region of the base (26), wherein a light source having LEDs or LED modules (28) is arranged at the end of the side section facing away from the base (26) and is designed for coupling light into the light guide, wherein the light shielding element (16) is designed as a shrink tube which is shrunk onto the lighting element (12).

3. The vehicle roof (10) according to claim 1 or 2, characterized in that the shading element has a transmission of less than 50%.

4. Roof (10) according to one of the preceding claims 1 or 2, characterized in that the lighting element (12) is U-shaped in a plane parallel to the roof with two parallel side sections (22, 24) arranged in the longitudinal direction of the vehicle and a base (26) which is arranged transversely to the side sections and connects the side sections.

5. The vehicle roof (10) according to claim 4, characterized in that the light shielding element (16) encloses the lighting element (12) in the region of the base (26).

6. The vehicle roof (10) according to claim 5, characterized in that the lighting element (12) is configured as a light guide, which is formed in a U-shape, and a light source with LEDs or LED modules (28) is arranged on an end (30) of a side section (22) facing away from the base (26), and the light source is configured for coupling light into the light guide.

7. The vehicle roof (10) according to any one of claims 2,5 or 6, characterized in that a further shading element (18, 20) is provided, which surrounds the lighting element (12) on both ends (30, 32) of the lighting element.

8. The vehicle roof (10) according to any of claims 1-2 and 5-6, characterized in that the lighting element (12) is configured as a light guide such that light coupled into the light guide is emitted laterally therefrom.

9. The vehicle roof (10) according to claim 8, characterized in that the light guide has a structure on a surface of the light guide that laterally couples out light coupled into the light guide from the light guide.

10. The vehicle roof (10) according to any one of claims 1-2, 5-6 and 9, characterized in that the lighting element (12) is constructed as a one-piece light guide.

11. The vehicle roof (10) according to any of the preceding claims 2 and 5 to 6 and 9, characterized in that the lighting element (12) is flexibly constructed and arranged curvedly in a U-shape on the vehicle roof.

12. The vehicle roof (10) according to any one of claims 1-2, 5-6 and 9, characterized in that it has: a top opening (34); and a fixedly mounted or displaceable cover (66) for closing the top opening; and two guide rails (36) for guiding a movable shielding element for shielding the top opening, wherein each guide rail comprises a receiving portion (38) in which the lighting element (12) is arranged.

13. Roof (10) according to claim 12, characterized in that the roof (10) has a roof ceiling (40) on the inside, and the roof ceiling ends with a ceiling edge at the edge of the roof opening (34) oriented parallel to the guide rail, and in that the receptacle (38) is arranged in the region of this ceiling edge (42).

14. The vehicle roof (10) according to claim 13, characterized in that the shielding element is a roller blind web (44) and that a side edge region (46) of the roller blind web (44) is turned in a turning region (48) of the guide rail (36), which turning region also constitutes the receiving portion (38), wherein the side edge region (46) is turned by the turning region from an orientation parallel to the vehicle roof first downwards and then again parallel to the vehicle roof and towards the roof opening.

15. Roof (10) according to claim 14, characterized in that the receptacle is configured substantially U-shaped and/or as a recess (64) with an opening which is oriented substantially horizontally and in the direction of the top opening (34).

16. Roof (10) according to claim 12, characterized in that a frame (50) is provided, which surrounds the top opening (34) rectangular, wherein the frame laterally has the two guide rails (36) and the frame has a frame front part (52) oriented in the vehicle transverse direction and a frame rear part (54) oriented in the vehicle transverse direction, wherein the lighting element (12) is U-shaped with two parallel edge sections (22, 24) and a base part (26), which is arranged transversely to the edge sections and connects the edge sections, and the edge sections are arranged on the two guide rails, and the base part is arranged on the frame front part or the frame rear part.

17. The vehicle roof (10) according to claim 16, characterized in that the lighting element (12) is shielded from light by the shielding element (16) in the region of the base (26).

18. A vehicle roof (10) according to claim 3, characterized in that the shading element has a transmission of less than 10%.

19. A vehicle roof (10) according to claim 3, wherein the light shielding element does not allow transmission.

20. The vehicle roof (10) of claim 6, wherein the light source is the only light source.

21. The vehicle roof (10) according to claim 9, wherein the structure is a roughness.