DE102009039556A1 - Illuminating system i.e. line- or surface illuminating system, for inner lining of motor vehicle, has fiber bundle arranged in enclosed plastic shroud in which side-emitting fibers are movable in axial direction against each other - Google Patents

Abstract

The system (1) has a laterally emitting light conductor including a fiber bundle (2) of side-emitting single fibers (3). The fiber bundle is arranged in an enclosed transparent plastic shroud (4) in which the side-emitting fibers are movable in an axial direction against each other. The plastic shroud is flexible, and has an internal contour that is adapted to a cross section of the fiber bundle. The internal contour of the plastic shroud edge-sidedly follows a form of the single fibers. The fiber bundle includes glass fibers with a core embedded in a casing. An independent claim is also included for a method for production of an illuminating system.

Description

Field of the invention

The The invention relates to a lighting system, in particular for the interior of a vehicle, as well as a method of manufacture a lighting system. Furthermore, the invention relates to an interior trim for a vehicle.

Background of the invention

optical fiber comprehensive lighting systems for motor vehicles known. These are both functional lighting, for example for illuminating a dashboard or a glove box, as well as so-called ambient lighting, which in the first Line the purpose of the interior of a vehicle, in particular of a motor vehicle to beautify.

The European patent EP 988 179 B1 shows, for example, an interior furnishing object in which an optical waveguide is inserted into a translucent hollow part. A disadvantage of this system is the relatively high installation costs. In addition, the optical waveguide in the hollow part is not adequately protected against moisture, so that, for example, when glass-fiber optical fibers are used, glass corrosion due to penetrating moisture can occur. Furthermore, light guides inserted loosely in a hollow part can tend to form waves or even loops, which results in inhomogeneous light emission.

Object of the invention

Of the Invention is based on the object, the disadvantages of the prior art described above at least to reduce.

Especially It is an object of the invention to provide a lighting system with optical fibers to provide, which can be easily installed.

A Another object of the invention is a line or area lighting system with uniform radiation can.

A Another object of the invention is an illumination device in a particularly simple way in an existing interior fit.

Summary of the invention

The The object of the invention is already achieved by a lighting system, through an interior trim for a vehicle, as well as through a method for producing a lighting system solved.

preferred Embodiments and developments of the invention are to refer to the respective subclaims.

The The invention provides a lighting system, which in particular is provided for the interior of a vehicle.

Especially is the lighting system for door panels, cockpit modules, Consoles, seats or the headliner of a vehicle suitable.

The Lighting system comprises at least one in an at least partially transparent plastic sheath arranged laterally emitting Light guide. The light guide comprises a fiber bundle of side emitting Fibers. In particular, step index fibers are used. The fiber bundle Side-emitting fibers is arranged in a completely enclosed plastic sheath. Under completely enclosed is understood that seen from the cross section the plastic sheath around the entire fiber bundle around is closed, so in particular not cut laterally was to insert the fibers. With a completely enclosed Plastic coating is a hermetic seal of the fibers so possible that only the ends of the plastic casing, which is preferably formed as a strand sealed have to.

Further are the side-emitting fibers at least in the axial direction movable against each other. A mobility of the fibers to each other is achieved in particular by the fact that the plastic coating is recessed in the fiber bundle, ie in particular forms a kind of hose in which the fibers are embedded. By a mobility of the fibers to each other, in particular in axial direction, it is achieved that tight bending radii possible are without breaking the side-emitting fibers.

The individual fibers are thus arranged loosely in an extruded plastic sheath. The plastic sheath is preferably elastic. The plastic casing preferably has an inner contour, which is adapted to the cross section of the fiber bundle. Thus, the inner contour of the plastic coating follows the edge of the shape of the individual fibers. In principle, the inner contour preferably has a substantially round cross-section. Due to the extrusion process used, the round cross-section has small bulges that follow the sidewalls of the individual fibers. The individual fibers are thus arranged in channels, which brings the advantage that the äußers th single fibers are guided through these channels and thus move radially less, but at the same time are axially movable relative to the jacket and the other individual fibers.

With The invention can be in contrast to the subsequent Inserting fiber bundles Fiber optics in almost any Make length. In particular, in the plastic casing arranged light guide a length of over 30 cm, preferably over 1 meter, more preferably over 2 metres.

Further the plastic casing may deviate from a round shape Have cross-section.

Especially The invention relates to a lighting system with at least one side emitting optical fiber, which is a fiber bundle side emitting fibers and wherein the fiber bundle is arranged in a completely enclosed plastic casing, in which the side-emitting fibers at least in the axial direction against each other are mobile. The plastic casing has a polygonal cross-section and can thus correspond in particular as a trim part Recordings are adjusted. The individual fibers of the fiber bundle border preferably at the edge directly to the plastic casing. There are thus no further intermediate layers provided because the Fiber bundles fed uncoated by extrusion becomes.

Preferably the fiber bundle has a 0.1 to 2 mm, preferably 0.2 to 0.5 mm smaller diameter than the recess of the plastic casing, in which the fiber bundle is arranged. So have the Individual fibers enough room to move against each other. At the same time, the individual fibers are packed tightly enough that waves or fiber loops largely prevented become.

Preferably become fibers with a diameter between 5 and 100, particularly preferably used between 40 and 80 microns. With such Fibers can be achieved on the one hand tight bending radii, on the other hand are the fibers for coupling and lateral coupling of light well suited.

The preferably applied by an extrusion process plastic coating protects the light guide from environmental influences and mechanical damage.

When laterally emitting light guides can be both plastic as well as glass fibers are used.

Especially laterally emitting glass fibers are used, which in turn a photoconductive core and a surrounding cladding comprising lower refractive index.

Around to provide such fibers with side emitting properties, There are different possibilities.

For example For example, light scattering particles can be placed in the core glass of the fiber become. Another option is to use the fiber core with a first shell, which comprises particles to envelop, for example, substantially the same refractive index as the core has. On this coat is then the cladding with a lower refractive index applied.

A Another possibility is to arrange particles in the jacket. Due to the evanescent field, it also leads to impurities, which cause a lateral emission of light.

One Fiber bundles in a preferred embodiment 100 to 100,000, preferably 200 to 5,000, individual fibers, which are arranged in the plastic casing.

The Entire fiber bundle has in a preferred embodiment the invention has a diameter between 0.5 and 10 mm, preferably between 0.9 and 5 mm.

With such glass fibers can achieve relatively tight bending radii, without the fibers breaking.

The Plastic coating is in a preferred embodiment The invention flexible, so that they are curved contours of a Interior trim can adapt. Preferably, bending radii of at least 50 mm, particularly preferably 20 mm can be achieved.

The Plastic sheath is preferably designed such that the plastic sheath also with the outer fibers the fiber bundle no material connection enters, almost all fibers loose, but with little Game lying in the sheath.

at a development of the invention, the plastic casing at least one flat side surface. In particular the plastic casing seen from the cross section at least in sections polygonal shaped.

The flat side surface can for example serve as a light exit surface. In particular, is present seen to arrange the flat side surface substantially flush with an adjacent portion of an interior trim. The light exit surface thus adapts to the existing contour of an interior trim.

Further can flat surfaces and the better mounting option serve the plastic coating. In particular, it is provided, a essentially rectangular plastic casing in a rectangular Insert recess and there form, force or cohesive to fix.

at a development of the invention, the plastic casing at least one fastening means.

When Fasteners may, for example, recesses in The plastic sheath serve to attach these clips to be able to. Next, the plastic casing itself be provided with clips or other retaining elements. Another Embodiment of the invention provides as a fastener a double-sided tape or a Velcro tape. Preferably the double-sided tape or Velcro on a flat Side surface of the plastic casing arranged.

The Plastic coating is preferably by an extrusion process applied.

While In extrusion, the process is preferably controlled so that the extruded plastic already directly or shortly after leaving the extrusion die is sufficiently firm that it is with the side emitting Fibers which fed in the middle of the extrusion die be, no cohesive connection received.

The entire fiber bundle is so tightly enclosed by the sheathing, at the same time, the individual fibers of the fiber bundle, for example, when bending the plastic casing, against each other move. This allows narrower bending radii to be achieved. If necessary and / or a closure of the faces the fiber bundle not already during the extrusion process is done, it is also possible, the fiber bundle after the extrusion process at its end faces and / or in to close its end areas. This can also be done with Help done by end sleeves, which are also beneficial can serve as a connection to the light source. Such closed fiber bundle can later without danger for the bundle in or on the inner lining be mounted, which is the manufacturing process of the invention Interior trim makes particularly economical.

simultaneously are disturbing influences of plastic coating reduced to the radiation characteristic of the fiber bundle. In particular, it does not occur inside the fiber bundle to reflection effects at an interface between the single fiber and the plastic in which the fiber is embedded.

When transparent plastic sheath, for example, a coat made of transparent PVC, TPU or silicone. Generally suitable elastomers, thermoplastic elastomers and thermoplastics for the formation of the transparent plastic casing. The use of PU leads to a particularly not impact resistant sheath.

in the According to the invention, the plastic casing can also be dyed or particles for obtaining optical effects. Such a plastic casing will therefore continue to be transparent viewed as a large part of the emitting light leaves the plastic sheath.

at a development of the invention, the light guide is eccentric arranged in the plastic casing. In particular, it is envisaged the light guide by at least one tenth, preferably at least one fifth of the width or height of the plastic casing to be offset from a center of the plastic casing.

So For example, the light guide in the vicinity of a light exit opening be positioned.

at a development of the invention is in addition to the light guide at least a reinforcing strand, in particular a plastic thread embedded in the plastic sheath. Such a second Soul leads to a higher mechanical strength the plastic sheath comprising the light guide.

at a development of the invention comprises the plastic casing at least one attachment extension. In particular, a round plastic casing provided with a substantially radially extending extension. An alternative embodiment provides a preferably in Essentially angular trained plastic casing before, which has two laterally extending attachment extensions.

Of the Fastening extension can be clamped in a cladding, for example, screwed in, riveted, welded or clipped become. In particular, the attachment extension by means of friction welding be attached.

at a development of the invention comprises the plastic casing at least one curved light exit surface. about a curved light exit surface can Inhomogeneities due to total reflections along right angles mutually standing edges are at least reduced.

at A further development of the invention comprises the plastic casing Barb for attachment. In particular, it is provided, the plastic casing to be provided with a Velcro strip. Such a plastic sheath can for example, by simply pressing on a nonwoven fabric an existing interior lining in a particularly simple manner be attached.

at a preferred embodiment of the invention the plastic casing at least one side edge, in particular the plastic casing is formed substantially rectangular. The side edge is preferably rounded, in particular with a Edge radius of more than 0.1, preferably more than 0.5 mm. It has been shown that especially rectangular edges due to total reflections along the edge to an inhomogeneous Can lead to light distribution. This effect will At least reduced by rounded side edges.

at a development of the invention is the transparent plastic sheath colored, in particular with a white color granules. It has been found that this results in a diffuse one Light scattering can be achieved, on the other hand, the white Farbgranulat age - related yellowish coloring of the Plastic coating neutralized.

at A further development of the invention is the plastic casing at least partially diffuse scattering formed. Especially can the plastic coating scattering particles such as scattered beads etc. are added.

The Fiber bundle is preferably through the plastic sheath hermetically sealed. It can thus in particular damage the glass fibers are avoided by water.

To the Seal the ends or apply the lighting system An adhesive can be used on a substrate. Especially a UV-curing one-component adhesive is provided. such Adhesives tend over known two-component adhesives to a much lesser extent to age-related yellowish discoloration.

at a development of the invention, the end face of Plastic coating against a light source, in particular to a light source, by means of the light in the fiber bundle is coupled, shaded. For this example, a used at the end patch sleeve. But it is also conceivable, the end face of the plastic casing Shade off with a paint. The shading is the Coupling light from the end face into the plastic casing, which in turn can act as a kind of light guide prevented. It has been found that such a yellowish discoloration effect in near the Einkoppelstelle can be avoided.

at a development of the invention is the plastic casing partially mirrored. The mirror coating is particularly adjacent to a substrate to which the illumination system is applied is arranged, and thus reflects light emitted to the rear in the direction of the viewer. The mirroring can be applied to both Applied inside and on the outside of the plastic jacket become. In particular, it is conceivable, a reflective aluminum foil applied.

at a development of the invention is a wire or a fiber embedded in the plastic sheath or in the plastic sheath inserted. Wire or fiber can serve as strain relief. The use of a wire of sufficient thickness may also allow that the plastic casing follows bending radii of the wire. So the plastic casing in a particularly simple way the Contour of the substrate, in particular a vehicle interior trim be adjusted.

at A further development of the invention is in the plastic casing an optical fiber in addition to the side emitting fibers arranged for data transmission or an electric cable. It Thus, a hybrid cable can be provided which in addition to the lighting function serve as a data line can.

It is also conceivable to fill the plastic casing with a liquid. It is understood that a liquid must be used which does not attack the individual fibers of the fiber bundle. About a liquid is particularly conceivable to achieve lighting effects. The liquid can, as it is provided in a further embodiment, but also be arranged in a separate strand in the plastic profile. The invention further comprises an interior trim panel for a vehicle comprising a previously described lighting system. It is understood that the lighting system includes other components. For example, LED light sources together with a control device can be provided, whose light is fed into the light guide described above.

In the interior trim of a vehicle can be the plastic casing in a particularly simple way clipped into the profile, inserted, glued, bolted and / or riveted.

at Another embodiment of the invention is the plastic casing sewn to the inner lining.

Further The invention relates to an embodiment in which the plastic coating behind a semi-transparent sheet, is arranged in particular a film or a fabric. So can the plastic casing with the light guide in particular behind Fabric covers the interior trim of a vehicle to be arranged over which is preferably provided an ambient lighting.

Fixing seams, with which the fabric cover and / or the plastic sheath are held in the non-visible area of the Interior trim arranged.

at Another embodiment of the invention is the plastic casing by means of one between an inner and outer Cladding arranged fastener attached. So forms the Plastic coating with the light guide an integral part an interior lining.

The The invention further relates to a method for producing a Lighting system, in particular a lighting system with one or more features described above.

The Invention provides for the provision of a fiber bundle, which comprises laterally emitting light guides and which means an extrusion process coated with a transparent plastic becomes.

While the extrusion process, in particular, over the Temperature of the extruded plastic controlled such that the Interior of the fiber bundle essentially of plastic left out.

The Extrusion process is controlled in such a way that the extruded Plastic does not flow between the individual fibers, but that the area of the fiber bundle is left out, so that the fibers of the fiber bundle are movable against each other are arranged in the extruded plastic sheath.

This For example, this is possible because the material already solidified shortly after leaving the extrusion die and thereby, that when extruding the material is not at the end of the extrusion die is compressed, as in known extrusion processes is often done.

Further is preferably a plastic sheath around the fiber bundle extruded, which has a larger inner diameter as the fiber bundle has. So have the individual fibers the fiber bundle sufficient play, especially in axial direction to move against each other.

The individual fibers of the fiber bundle preferably border directly to the plastic casing, but without a cohesive To connect with the plastic sheath. simultaneously the bundle of fibers is so tightly embraced that unlike the subsequent insertion of individual fibers, no loops or creases can form. Rather, they are Preferably, the fibers are packed so tightly that the individual fibers Although you can move against each other in the axial direction, otherwise the arrangement of the individual fibers to each other but also while moving is maintained. Preferably, a flexible Plastic used. In an alternative embodiment but the invention is also conceivable to produce a rigid optical fiber.

For the formation of a flexible light guide, the following plastics have proven to be particularly suitable:
PVC, FEP, PFA, ETFE, THV, PVDF, PE, PP, LDPE, LLDPE, LLDPE / PP, TPE-S, TPE-E, TPE-U

at These plastics can be controlled in such a way the extrusion process be that the individual fibers are not in the liquid Store plastic at the outlet on the extrusion tool.

For the training as a rigid optical fiber, the following plastics are particularly suitable:
PC, PVC, PMMA, PMMI, COC, FEP, PFA, EFTE, THV, PVDF, PA, PE, PP, LDPE, LLDPE, LLDPE / PP

These Plastics can also be used as additional protection against external influences chemical or mechanical nature in the context of a co-extrusion or subsequent Extrusion be applied to a first plastic sheath.

Also the use as a diffuser element for the homogenization of the light or as a fastening element, in particular in a vehicle, is provided.

In addition, fol the following plastics are used:
FEP, PFA, ETFE, THV, TPE-S, TPE-E, TPE-U

These However, plastics are only partially suitable as Erstummantelung because there is an increased risk of these plastics, that the individual fibers combine with the plastic.

For the interior of a vehicle in which high temperatures occur If, in particular, the plastic groups PE, PP, LDPE, LLDPE, LLDPE / PP and TPU proven. It can too Mixtures of these plastics (blends) can be used. For temperatures up to 95 ° C can also heat-stabilized PVC plastics are used. These will, to reduce the risk of yellowing, with an additive Mistake.

ever according to application is also a processing of two or more Plastic types simultaneously in a co-extrusion or sequentially switched extrusion (tandem extrusion) possible. So can For example, plastics of different hardness, color or elasticity can be combined with each other.

For rigid light guides, in particular a material combination of the following variants is conceivable:
PMMA, COC, PC / PVC and / or PE as a sheath generally adhere well to other plastics.

With PMMA or COC can be a tough impact-resistant Polishing outer jacket with a long-term temperature resistance provide up to 120 ° C.

Further These materials are especially suitable for extrusion suitable for thin fibers.

PMMI / THV or ETFE, on the other hand, generally do not enjoy good ownership another extruded plastic. This offers but the use of adhesion promoters.

PMMI is particularly suitable for providing a hard impact-resistant Polishing outer jacket with a continuous temperature resistance of over 120 ° C.

THV or ETFE are especially used as inner jacket for extrusion directly on the fibers.

The following Extrusion processes are also possible in combination. at the single-extrusion is just a plastic sheath applied. Tandem extrusion uses two different plastics applied to successively connected extruders. In co-extrusion be at least two different plastics substantially simultaneously applied to the fiber bundle.

The Temperature of the extruded plastic is preferably such controlled that the fibers of the fiber bundle no cohesive Connect with the plastic sheath.

A cohesive connection of the individual fibers of the fiber bundle with the plastic casing can in an alternative embodiment The invention can also be avoided by the fact that the fiber bundle previously wrapped in a wrapping material, which is a cohesive connection prevented or thereby, that it is coated with a release agent. Preferably, however, by the extrusion process itself the formation of a cohesive Connection prevented.

The Fiber bundle is without sheathing the extrusion machine fed so that the individual fibers in direct contact stand with the sheath.

At the Extruding the plastic can, to prevent the fibers gluing with the sheath, a release agent can be used. As a suitable release agent, for example, an alcohol / stearin mixture, an oil, alkylisilane or a silicone oil become. Preferably, a release agent is used, which is not evaporates, as the vaporizing release agent to form changes in Extrusion process can lead. In a preferred embodiment However, no release agent is used. It turned out that when selecting certain plastics and suitable process control can be dispensed with a release agent.

at a development of the invention is in at least two steps a transparent plastic sheathing around the fiber bundle extruded. The plastic sheath thus consists of two layers. With such a multi-stage process can be more complex Providing geometries with high dimensional accuracy. Especially because in the extrusion of the sheath directly around the fiber bundle no pressure is exerted on the extruded strand can, offers itself, initially a simpler geometry, in particular to extrude a round strand and then into a second step a strand with a more complex geometry, especially with lugs to extrude the round strand. In the second process step pressure can be exerted on the strand because the fibers are already trapped in the first strand.

In a development of the invention who extruded the two different materials around the fiber bundle.

So can be a composite material with improved properties provide.

For example an inner plastic sheath can be a relatively soft, pliable one Material include, whereas the outer plastic sheath a harder impact resistant material such as PU covers.

The Fiber bundles are preferably supplied without sheathing and is so embedded directly in the plastic.

Farther Preferably, the fibers of the fiber bundle are so stretched, avoiding fiber loops and larger waves become. So is a particularly evenly radiating Fiber optics provided.

Further The invention relates to a lighting system, in particular for the interior of a motor vehicle, which is a Velcro tape with side emitting Includes light guides.

According to the Invention are laterally emitting optical fibers in a preferably transparent Velcro tape integrated.

Especially the Velcro strip is at least partially transparent.

The Inventors have found that through the integration of laterally emitting fibers in a Velcro a particularly inexpensive and easy-to-install surface light, especially for can provide the interior of a motor vehicle.

Brief description of the drawings

The invention will be described below with reference to the drawings 1 to 11 , which each show schematically illustrated embodiments of the invention will be explained in more detail.

1 shows the part of an interior trim with a lighting system with a substantially rectangular cross-section,

2 shows an alternative embodiment with a round cross section,

3 shows a further embodiment with rectangular cross-section,

4 shows an embodiment of the invention, in which the plastic covering comprising the light guide is arranged behind a semitransparent cover,

5 shows an embodiment of the invention with a substantially round cross section and a fastening extension,

6 shows an embodiment of the invention with rectangular cross-section and two attachment extensions,

7 shows a plastic casing with a reinforcing strand,

8th and 9 show an embodiment of the invention, in which the plastic strand has fastening recesses.

10 shows an embodiment of the invention, in which the plastic strand has two fastening extensions and is rounded at the edges.

Referring to 11 an inventive method for producing a lighting system will be explained in more detail.

12 shows schematically a detailed representation of the edge region of a fiber bundle at the border to the plastic casing.

Detailed description the drawings

1 shows a first embodiment of the invention of a lighting system 1 , The lighting system 1 comprises a fiber bundle as a light guide 2 which consists of side-emitting individual fibers 3 is composed. The fibers 3 consist in this embodiment of glass and have a photoconductive core with a cladding (not shown). The fiber bundle 2 is in the plastic casing 4 arranged such that the individual fibers 3 of the fiber bundle 2 at least in the axial direction are freely movable.

The plastic casing 4 For example, a transparent silicone or a PVC is flexible and can adapt to contours of an interior trim. In this embodiment, the plastic sheath sits 4 in a recess of the interior trim 6 , The interior lining 6 has a rectangular groove in which the plastic casing 4 by means of a bond 5 is held.

About the light exit surface 7 The light enters the interior of a vehicle (not shown) and can be used as functional lighting or as ambient lighting.

The light exit surface 7 the plastic casing 4 Closes in this embodiment, substantially flush with the inner lining 6 from. The lighting device 1 thus forms with the interior trim 6 together a substantially flat smooth surface.

2 shows a further embodiment of the invention, in which the fiber bundle 2 in a plastic jacket 4 is arranged with a substantially round cross-section.

Otherwise, the execution essentially corresponds to the 1 ,

Again, the plastic sheath 4 in a recess 8th an interior lining 6 a vehicle introduced. The plastic casing 4 is on the edge over a bond 5 connected to the interior trim.

Alternatively or additionally, the plastic casing also by means of a positive connection 9 , such as a screw or a rivet are attached. This is particularly suitable in this embodiment with a round cross-section, in which a flat bonding is possible only to a limited extent.

3 shows a further embodiment of the invention, in which the fiber bundle 2 comprehensive plastic coating 4 is rectangular and formed in a recess of the inner lining 6 is introduced.

For attachment in this embodiment, a profiled fastening tape 10 provided, which in both the interior trim 6 as well as in the plastic casing 4 intervenes. Alternatively, a Velcro tape or a double-sided adhesive tape can be used.

4 shows a further alternative embodiment of the invention, in which the fiber bundle 2 in a rectangular plastic casing 4 is embedded.

The plastic casing 4 is in the recess of an interior panel 6 arranged.

In this embodiment, the plastic jacket 4 with a semi-transparent sheet 11 , in particular a fabric covering blinded.

This is the semi-transparent sheet 11 around a section of interior trim 6 wrapped around and at the edge over seams 12 with the adjoining interior lining 13 , which is preferably also formed of a textile material connected.

The light exit surface 7 is made of the semi-transparent sheet 11 educated. Again, the light exit surface closes 7 essentially flush with the adjacent interior trim 13 from.

5 shows a further embodiment of the invention, in which the fiber bundle 2 in a substantially round plastic casing 4 is embedded. The round plastic casing 4 has a fastening extension 14 on, which is integral with the plastic casing 4 is formed and extends in the radial direction. The attachment process 14 is in a recess 8th the interior lining 6 inserted and fixed there form, force or cohesively. In particular, the attachment extension 14 sewn.

6 shows a further embodiment of the invention, in which the fiber bundle 2 in a substantially rectangular plastic casing 4 is arranged.

The plastic casing 4 points in the light exit surface 7 opposite side two extensions 14 on.

The attachment extensions 14 lie between the inner lining adjacent to the interior and another inner lining 16 ,

In this embodiment, the attachment extensions 14 by means of positive connections 9 which through the inner panel 16 are stuck, fixed.

alternative is also a positive or cohesive connection possible.

In particular, the plastic sheath can 4 with the attachment extensions 14 be inserted so that they are between the individual pieces of trim 6 and 16 is trapped.

7 shows an embodiment of the invention, in which in the plastic casing 4 next to the fiber bundle 2 a reinforcing strand 17 , is preferably embedded in the form of a plastic thread.

This embodiment, which can be combined in particular with the other embodiments described above, leads to a higher mechanical strength of the lighting system 1 ,

Referring to 8th and 9 a further embodiment of the invention will be explained be, at which, as in 8th it can be seen, the plastic casing 4 fixing recesses 18 having.

The mounting recesses 18 , which are preferably arranged at regular intervals, correspond with on the inner lining 6 arranged extensions 19 ,

As in 9 can be seen, so the plastic casing 4 with the fiber bundle 2 on the interior lining 6 be plugged and thus forms a lighting system with a substantially flat trained light exit surface 7 ,

This in 10 illustrated lighting system 1 includes as plastic coating 4 a plastic strand, which is essentially the in 6 illustrated plastic strand with rectangular cross-section and two attachment extensions 14 equivalent.

The plastic casing 4 in which the fiber bundle 2 is embedded, both at the corners 20 the light exit surface 7 , as well as at other corners 21 rounded. The rounding minimizes inhomogeneities due to multiple total reflections along right-angled edges.

Referring to 11 the production of a lighting system according to the invention will be explained in more detail with reference to a schematically illustrated embodiment.

Shown is an extrusion die 22 which has a central hole 24 over which the fiber bundle 2 the extrusion nozzle 22 is supplied. To the fiber bundle 2 around a channel runs 23 over which around the entire circumference of the fiber bundle around a plastic sheath 4 can be extruded. During the extrusion process, the process parameters are controlled so that it does not lead to a material connection between the individual fibers of the fiber bundle 2 and the plastic jacket 4 comes.

12 shows a schematic detail of an illumination system as in particular 1 is shown.

In the detail view is the edge of the fiber bundle with the individual fibers 3 and a section of the plastic casing 4 shown. The inner cross section of the plastic casing 4 is adapted to the cross section of the fiber bundle. Basically, as in 1 it can be seen, the plastic casing 4 a round inner cross section. In this detail, it can be seen that the inner casing of the plastic casing is produced by the extrusion process 4 the contour of the individual fibers 3 adapts. Thus, at least in sections, channels are formed 25 acting as an axial guide of the individual fibers 3 serve. The channels 25 can prevent individual fibers from moving radially relative to one another. In the axial direction are the individual fibers 3 against it movable.

It it is understood that the invention is not intended to be a combination above described characteristics is limited, but that the Specialist all characteristics, as far as it makes sense will combine.

1

lighting system

2

fiber bundles

3

photoconductive fiber

4

Plastic sheathing

5

bonding

6

interior panelling

7

Light-emitting surface

8th

recess

9

positive connection

10

fixing tape

11

semi-transparent sheet

12

seam

13

interior panelling

14

Attachment projection

15

fastener

16

inner paneling

17

reinforcing strand

18

recess

19

extension

20

corner

21

corner

22

extrusion die

23

channel

24

drilling

25

channel

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 988179 B1 [0003]

Claims (51)

Lighting system, in particular for the interior of a vehicle comprising at least one laterally emitting light guide, which side-emitting a fiber bundle Fibers, wherein the fiber bundle in a completely enclosed transparent Plastic sheath is arranged, in which the side-emitting Fibers are movable against each other at least in the axial direction. Lighting system according to the preceding claim, characterized in that the individual fibers of the fiber bundle are arranged loosely in an extruded plastic sheath. Illumination system according to one of the preceding claims, characterized in that the plastic sheath elastic is. Illumination system according to one of the preceding claims, characterized in that the plastic sheath an inner contour has adapted to the cross section of the fiber bundle is, in particular that the inner contour of the plastic casing edge of the shape of the individual fibers follows. Illumination system according to one of the preceding claims, characterized in that the plastic casing at least has a flat side surface. Illumination system according to one of the preceding claims, characterized in that the plastic casing at least having a fastening means. Illumination system according to one of the preceding claims, characterized in that the fiber bundle is a 0.1 to 2 mm, preferably 0.2 to 0.5 mm smaller diameter than the recess of the plastic sheath in which it is arranged is, has. Lighting system according to the preceding claim, characterized in that the fiber bundle fibers a core embedded in an enclosure, in particular Glass fibers. Illumination system according to one of the preceding claims, characterized in that the plastic sheath of a flexible material is formed. Illumination system according to one of the preceding claims, characterized in that a fiber bundle with 100 to 100,000, preferably 200 to 5000 individual fibers in the plastic casing is arranged. Illumination system according to one of the preceding claims, characterized in that a fiber bundle with a the diameter between 0.5 and 10 mm, preferably between 0.9 and 5 mm in the plastic sheath is arranged. Illumination system according to one of the preceding claims, characterized in that the fibers of the fiber bundle a diameter between 5 and 100, preferably between 40 and 80 microns have. Illumination system according to one of the preceding claims, characterized in that the light guide is eccentric in the Plastic sheath is arranged. Illumination system according to one of the preceding claims, characterized in that in addition to the light guide at least one Reinforcing strand, in particular a plastic thread, in the plastic sheath is embedded. Illumination system according to one of the preceding claims, characterized in that the plastic casing at least includes a fastening extension. Illumination system according to one of the preceding claims, characterized in that on the plastic casing barbs are arranged for attachment. Illumination system according to one of the preceding claims, characterized in that the plastic casing at least having a side edge, wherein the side edge is rounded, preferably with an edge radius of more than 0.1, more preferably more than 0.5 mm. Illumination system according to one of the preceding claims, characterized in that the plastic casing at least a curved light exit surface comprises. Illumination system according to one of the preceding claims, characterized in that the plastic sheath a plurality having recesses for attachment. Illumination system according to one of the preceding claims, characterized in that the individual fibers can be surrounded on the edge adjoin the plastic casing. Lighting system according to one of the preceding claims, characterized in that the arranged in the plastic sheath light guide has a length of about 30 cm, preferably over 1 m, more preferably over 2 m. Illumination system according to one of the preceding claims, characterized in that the plastic sheath one of a round shape has a different cross-section. Lighting system, in particular according to one of preceding claims, comprising at least one laterally emitting light guide, which side-emitting a fiber bundle Fibers, wherein the fiber bundle in a completely enclosed Plastic sheath is arranged, in which the side-emitting Fibers are movable against each other at least in the axial direction, and wherein the plastic casing has a polygonal cross-section. Illumination system according to one of the preceding claims, characterized in that the transparent plastic sheath is colored, in particular with white color granules. Illumination system according to one of the preceding claims, characterized in that the plastic casing at least partially diffuse scattering is formed, in particular scattering particles includes. Illumination system according to one of the preceding claims, characterized in that the fiber bundle through the Plastic coating is hermetically sealed. Illumination system according to one of the preceding claims, characterized in that the end face of the plastic casing is shadowed from a light source. Illumination system according to one of the preceding claims, characterized in that the plastic casing partially is mirrored. Illumination system according to one of the preceding claims, characterized in that a wire and / or a fiber in the Plastic coating is embedded or inserted. Illumination system according to one of the preceding claims, characterized in that in the plastic casing at least a light guide for data transmission and / or at least an electric cable is arranged. Illumination system according to one of the preceding claims, characterized in that the plastic casing with a Liquid is filled. Interior trim for a vehicle comprising an illumination system according to any preceding claim. Inner lining according to the preceding claim, characterized in that the plastic casing in one Profile of the interior lining is arranged. Inner lining according to the preceding claim, characterized in that the plastic coating in the profile clipped, inserted, glued, screwed, welded and / or riveted. Inner lining according to one of the preceding claims, characterized in that the plastic casing at least has a substantially planar side surface and the Side surface substantially flush with one completing adjacent section of interior trim. Inner lining according to one of the preceding claims, characterized in that the plastic casing on the inner lining sewn. Inner lining according to one of the preceding claims, characterized in that the plastic casing behind a semi-transparent sheet, in particular a film or a substance is arranged. Inner lining according to one of the preceding claims, characterized in that the plastic casing by barbs, in particular on a nonwoven fabric, is attached. Inner lining according to one of the preceding claims, characterized in that the plastic casing by means of at least one between an inner and outer panel arranged fastener is attached. Method for producing a lighting system, in particular a lighting system according to one of the preceding Claims comprising the steps: - Provide a fiber bundle which laterally emitting optical fibers includes; - Extruding a transparent plastic around the fiber bundle so that the individual fibers of the Fiber bundle against each other movable in an extruded Plastic sheath are arranged. Method for producing a lighting system according to the preceding claim, characterized in that a plastic casing with a larger inner diameter as the fiber bundle is extruded around the fiber bundle. Method for producing a lighting system according to one of the preceding claims, characterized that the fiber bundle supplied without wrapping becomes. Method for producing a lighting system according to one of the preceding claims, characterized that the extrusion, in particular on the temperature of the extruded plastic, so controlled that the fibers the fiber bundle no material connection go with the plastic sheath. Method for producing a lighting system according to one of the preceding claims, characterized that in at least two steps, a transparent plastic casing is extruded around the fiber bundle. Method for producing a lighting system according to the preceding claim, characterized in that two various plastics are extruded around the fiber bundle become. Method for producing a lighting system according to one of the preceding claims, characterized that the fiber bundle fed without sheathing becomes. Method for producing a lighting system according to one of the preceding claims, characterized that the fibers of the fiber bundle are stretched in such a way that fiber loops are avoided. Method for producing a lighting system according to one of the preceding claims, characterized that a release agent is applied before the extrusion of the plastic. Lighting system, especially for the interior of a motor vehicle, in particular according to one of the preceding claims, comprising at least one Velcro strip, which laterally emitting optical fibers includes. Lighting system according to the preceding claim, characterized in that the Velcro strip in addition to the light guides comprising further transparent fibers. Illumination system according to one of the preceding two Claims, characterized in that the Velcro strip at least partially transparent.