CN209819286U

CN209819286U - Lighting device for vehicle and vehicle with same

Info

Publication number: CN209819286U
Application number: CN201920205528.0U
Authority: CN
Inventors: 马库斯·维默尔; 亚历山大·萨伊亚洛夫
Original assignee: Lisa Drake Semel Co Ltd
Current assignee: Lisa Drake Semel Co Ltd; Lisa Draexlmaier GmbH
Priority date: 2018-02-19
Filing date: 2019-02-15
Publication date: 2019-12-20
Anticipated expiration: 2029-02-15
Also published as: DE102018103659A1

Abstract

A lighting device for a vehicle, having: a first housing part (2) made of a first plastic and a second housing part (3) made of a second plastic, the first and second housing parts together forming an accommodation space (4) with at least one light exit opening (5); at least one light emitting module accommodated in the accommodating space and having at least one light source (9); and at least one light guide (7) accommodated in the accommodation space for guiding light (L) emitted from the at least one light source to the at least one light exit opening, wherein the light guide is a two-component light guide having a transparent first light guide portion (10) and a diffuse second light guide portion (11) optically connected downstream of the first light guide portion. A vehicle equipped with the lighting device, wherein the lighting device is disposed between a windshield (W) and an instrument panel (I). The invention is particularly advantageously applied to lighting devices used for interior or ambient lighting, in particular of cars.

Description

Lighting device for vehicle and vehicle with same

Technical Field

The utility model relates to a lighting device for vehicle, it has: a first housing part made of a first plastic and a second housing part made of a second plastic, which together form an accommodation space having: at least one light outlet; at least one light emitting module accommodated in the accommodating space, the light emitting module having at least one light source; and at least one light conductor accommodated in the accommodation space, the light conductor being provided for guiding light exiting from the at least one light source towards the at least one light exit opening. The invention also relates to a vehicle with such a lighting device, wherein the lighting device is arranged between the windscreen and the dashboard. The invention also relates to a method of manufacturing such a lighting device. The invention can be used particularly advantageously in lighting devices used for interior or ambient lighting, in particular of passenger cars.

Background

DE 102010030660 a1 discloses an interior trim part for a vehicle, comprising a light-emitting element for emitting light and a strip-shaped light-guiding element. Wherein the light guiding element has a first plane and a second plane, wherein the first plane is one of the two largest planes of the light guiding element and the second plane is a plane deviating from the first plane, and the first plane has a coupling-in face. Furthermore, the light-guiding element and the light-emitting element are arranged and designed such that light from the light-emitting element can be coupled in via the incoupling surface into the light-guiding element and can be coupled out via the second plane.

EP 2639108 a2 discloses a lighting device, in particular a combination contour lighting and ambient lighting for a motor vehicle, wherein the housing comprises a first housing part and a second housing part, wherein an optical waveguide is accommodated in an accommodation space between the first housing part and the second housing part, and a strip is arranged between and flush with the outer edges of the first housing part and the second housing part, which strip is made of a plastic film that transmits light exiting from the optical waveguide, wherein the exiting light is coupled in at an end face of the strip and coupled out at the other end face, and a third housing part is provided, which is arranged on the second housing part while forming a gap that opens toward the outer edge, wherein a second optical waveguide is accommodated in the accommodation space between the second housing part and the third housing part, the exiting light of which passes through the gap.

SUMMERY OF THE UTILITY MODEL

The object of the invention is to provide a particularly inexpensive and simple to manufacture way to emit a strip-shaped light pattern from a vehicle, in particular in the interior space of a vehicle, in particular as ambient lighting, using a device of as simple a structure as possible.

According to the utility model discloses a lighting device for vehicle has: a first housing part made of a first plastic and a second housing part made of a second plastic, which together form an accommodation space, which has at least one light exit opening; at least one light emitting module accommodated in the accommodating space, the light emitting module having at least one light source; and at least one light guide accommodated in the accommodation space, the light guide being provided for guiding light emitted from the at least one light source to the at least one light exit opening, wherein the light guide is a two-component light guide having a transparent first light guide portion and a diffuse second light guide portion optically connected downstream of the first light guide portion.

The lighting device has the advantage that it can be mounted in a plurality of ways and is easy to produce. Accordingly, various forms of light emitting modules can be received in the receiving space to generate light. Furthermore, the use of a two-component housing part can be dispensed with. In addition, expensive masking or laser machining can be omitted in the painting of the housing parts.

The first housing part forms a first part of the wall of the receiving space, while the second housing part forms a second part of the wall of the receiving space. The first housing part also forms a first part of the wall of the light exit opening, while the second housing part also forms a second part of the wall of the light exit opening. The first housing part and/or the second housing part can be coated.

The light emitting module may have, for example, a rigid or flexible printed circuit board on which the at least one light source is arranged. Electronic components, such as series resistors or driver components, may be disposed on the circuit board.

One improvement is that the lighting device has exactly one light module and exactly one light conductor. This makes manufacture and installation simple. An alternative refinement provides that the lighting device has exactly one light module and a plurality of light conductors. The light conductors can be assigned to different light sources. An alternative refinement is that the lighting device has a plurality of light modules and a plurality of light sources.

In one refinement, the at least one light source comprises or has at least one light-emitting diode. In the case where there are a plurality of light emitting diodes, the light emitting diodes may be lit in the same color or in different colors. In particular, the light emitted from the light emitting module may be color variable, i.e. the light emitting module is a color variable light emitting module. The plurality of light emitting diodes may generate a mixed light, for example a white mixed light. The light emitting diode may be a single light emitting diode or an LED chip. The at least one light emitting diode may comprise at least one inorganic light emitting diode and/or at least one organic light emitting diode.

The provision of a light conductor for guiding the light emitted from the at least one light source towards the at least one light outlet comprises, in particular, designing and arranging the light conductor for this purpose.

The light guide is a two-component light guide having a transparent first light guide part and a diffuse second light guide part optically connected downstream of the first light guide part, which comprises in particular: the light generated by the at least one light-emitting module is coupled into the first light guide section of the light guide, is first guided in the first light guide section, is then transferred into the second light guide section, and is coupled out of the second light guide section. The light coupled out from the second light guide portion exits the illumination device, in particular through the light exit opening. The two light guides of the two-component light guide are formed integrally or monolithically with one another.

The light guide of the dual component is in particular made of plastic, i.e. the first light guide part is made of transparent plastic and the second light guide part is made of diffuse plastic. The base material of the second light guide section can be a transparent plastic for the first light guide section and additionally has, for example, scattering particles, pores, etc.

In one embodiment, the light exit opening is delimited by two housing parts, and the second light guide is fixed in the light exit opening. In this way, a particularly simple, secure and precise fixing of the light guide in the light exit opening can be achieved. The second light guide can be held between the two housing parts, in particular when the two housing parts are connected.

In one embodiment, the second light guide section is held in the light exit opening in a form-fitting manner. This enables a particularly precise positioning of the light guide. In a refinement, the second light guide has at least one laterally projecting projection which engages in a mating recess of the first housing part and/or the second housing part. The projections may be formed as ribs and the recesses may be formed as elongated slots, for example.

In addition or alternatively, the second light guide is held in the light outlet in a force-fitting manner, for example clamped between two housing parts.

In addition or alternatively, the second light guide part is held in the light exit opening by means of a material fit, for example by being adhesively bonded to the two housing parts. The bonding has the advantage that the light exit is prevented from being split by separation of the housing parts.

In a further development, the light guide projects into the light exit opening, but is not held there.

In one refinement, the light guide is completely accommodated in the receiving space and therefore does not project into the light exit opening.

In one embodiment, the outer edge of the wall delimiting the light outlet projects or protrudes outwardly with respect to the second light guide portion. Thus, the wall may act as a barrier or shield to laterally define the light pattern of the light exiting from the light exit port. This in turn has the advantage that reflection of the emitted light on vehicle components, such as windshields, dashboards, etc., can be deliberately avoided. This embodiment can also be implemented in that the second light guide portion is sunk into the light outlet.

One refinement provides that the edge of the light exit projects by between 2mm and 8mm, in particular between 4mm and 5mm, relative to the second light guide.

One improvement is that the extent of the protrusion differs depending on its position relative to the light guide. Thus, the projection above the light guide may be deeper (further projected) than the projection below the light guide, or the like.

In one embodiment, the first housing part and/or the second housing part each have at least one rib facing the receiving space, which rib is arranged on the light guide. This makes it easy for the light conductor to be accurately positioned.

In one embodiment, the first housing part and the second housing part each have at least one rib facing the receiving space, which rib receives the light guide body between them, in particular makes contact between them, in particular is clamped between them. This makes it easy for the light guide to be positioned particularly precisely.

In one embodiment, the at least one light module and the at least one optical waveguide are firmly connected to one another. This enables a particularly precise light conduction and a particularly robust construction. A particularly secure connection can be achieved, for example, by form fit, force fit and/or material fit. In particular, the optical waveguide can be locked (e.g. clipped), crimped, molded onto the light module, in particular the circuit board.

In one embodiment, the first plastic of the first housing part is conformed to the second plastic of the second housing part. This further simplifies manufacturing. The plastic may be or have PC and/or ABS, for example, and is in particular opaque, for example black.

In one refinement, the light exit opening is strip-shaped or has a strip-shaped basic shape. Such a light exit opening has a direction ("length direction") which is significantly longer than a direction ("width direction") perpendicular thereto, for example at least twice, at least five times, at least ten times or at least twenty times longer. Such light outlets may also be referred to as stripe or slit shaped light outlets. The light exit opening may be continuously open or interrupted by narrow spacers.

In one embodiment, the lighting module has at least one light strip with a plurality of light sources, in particular LEDs, arranged in a row. A light strip is to be understood in particular as a lighting device having a strip-shaped substrate or circuit board, on which light sources are arranged in a row, in particular equidistantly, along the longitudinal extent thereof. The light sources may also be groups of light sources (e.g. groups of LEDs of different colors) arranged in rows. In one refinement, the length of the light strip corresponds at least approximately to the length of the light exit opening.

In one embodiment, the at least one light guide body has a strip-like basic shape and is oriented such that light generated by the at least one light source can impinge into the light guide body on a first narrow side and emerge from the light guide body on an opposite narrow side.

The object is also achieved by a vehicle having the above-mentioned lighting device, wherein the lighting device is arranged between the windshield and the instrument panel.

The vehicle may be a motor vehicle (e.g., a motor vehicle such as a passenger car, truck, bus, or the like, or a motorcycle), a train, a watercraft (e.g., a boat or ship), or an aircraft (e.g., an airplane or helicopter).

If the vehicle is a motor vehicle, in particular a passenger car, an advantageous embodiment is that the lighting device extends continuously between the left and right a-pillars of the vehicle.

The above object is also achieved by a manufacturing method of manufacturing a lighting device as described above, the method having at least the steps of:

a) the at least one light-emitting module is firmly, in particular form-fittingly, connected to the at least one optical waveguide;

b) mounting at least one optical conductor on the first housing part;

c) the first housing part is connected to the second housing part such that an accommodating space and a light exit opening are formed between the first housing part and the second housing part, and the at least one light-emitting module and the at least one light conductor are arranged in the accommodating space.

Such a manufacturing method is particularly simple and economically feasible and provides a lighting device that emits light strongly and accurately.

Step b) may comprise locking/clamping and adhering the photoconductor to the first housing part.

Step c) may comprise bonding and/or hot stamping of the first housing part to the second housing part.

In one embodiment, in step c), the diffuse second light guide section of the at least one light guide body is fixed, in particular form-fittingly engaged and/or glued, in the light exit opening.

Drawings

Advantageous embodiments of the invention will be described below with reference to the accompanying drawings. Shows that:

fig. 1 shows a side sectional view of a lighting device according to a first embodiment according to the present invention;

fig. 2 shows a side cross-sectional view of a first process step of manufacturing a lighting device according to a first embodiment;

fig. 3 shows a side cross-sectional view of a second process step of manufacturing a lighting device according to the first embodiment;

fig. 4 shows a side cross-sectional view of a third process step of manufacturing a lighting device according to the first embodiment;

FIG. 5 shows a side cross-sectional view of a portion of a vehicle having a lighting device according to a first embodiment;

fig. 6 shows a side sectional view of a part of a vehicle with a lighting device according to a second embodiment.

List of reference marks

1 Lighting device

2 first housing part

3 second housing part

4 accommodation space

5 light outlet

5a outer edge of the light outlet

5b outer edge of the light outlet

6 LED light band

7 optical conductor

8 circuit board

9 LED

10 first light guide

11 second light guide

12 bonding groove

13 projection

14 first rib

15 second rib

16 locking pin

17 locking hook

18 hot stamped rivet

21 Lighting device

22 optical conductor

23 second light guide

Eye A

F vehicle

I instrument panel

KR adhesive bead

L light

SL arrow

S1-S3 process steps

t1 depth of first edge

t2 depth of second edge

W windshield

Detailed Description

Fig. 1 shows a side sectional view of a lighting device 1 for a vehicle F (see fig. 5 and 6), which lighting device 1 has a first housing part 2 made of a first plastic (for example PC and/or ABS) and a second housing part 3 made of a second plastic (for example PC and/or ABS). The two housing parts 2, 3 together form an accommodating space 4 with a light exit opening 5. The light exit opening 5 is delimited by the two housing parts 2, 3.

In the receiving space 4, a lighting module is arranged in the form of an LED light strip 6 and a strip-shaped light conductor 7. The LED light strip 6 has a strip-shaped circuit board 8, the length direction of which is perpendicular to the image plane and which is arranged on a light source in the form of a plurality of LEDs 9 arranged in series. The light exit 5 is also formed in a stripe or band shape whose longitudinal direction is perpendicular to the image plane. A light conductor 7 is provided, i.e. provided and arranged, for guiding light, which may exit from the LED9, towards the light exit opening 5. When looking inwards from the outside of the light outlet 5 (as indicated by arrow SL), a light strip or "light line" is provided which is visible to the observer.

The light guide 7 is a two-part light guide having a first light guide section 10 and a second light guide section 11 which is optically connected downstream to the first light guide section 10. The first light guide portion 10 is made of transparent plastic, and the second light guide portion 11 is made of scattering or light diffusing plastic. The two light guides 10, 11 are formed integrally or monolithically with one another. The light guide 7 is produced, for example, as a two-component injection molded article.

In particular, the outer edges 5a, 5b of the light exit opening 5 project outwards with respect to the second light guide 11, in particular between 2mm and 8mm, more in particular between 4mm and 5 mm. Wherein the "upper" rim portion 5a formed by the first housing part 2 has a different degree of protrusion than the "lower" rim portion 5b formed by the second housing part 3. In particular, the edge portions 5a, 5b may protrude outwardly between 2mm and 8mm, in particular between 4mm and 5mm, with respect to the second light guide portion 11.

The first light guide 10 is firmly connected, for example locked, to the LED strip 6, in particular to its circuit board 8. The second light guide 11 is fixed in the light exit opening 5 and is at least form-fit and material-fit, if appropriate also force-fit, in this case. For this, the first housing portion 2 and the second housing portion 3 may have adhesive grooves 12, respectively, into which the respective side protrusions 13 of the second light guide 11 are engaged.

Alternatively, the first housing part 2 can have at least one first rib 14 facing the receiving space 4 and/or the second housing part 3 can have at least one second rib 15 facing the receiving space 4, which receives the light guide 7 therebetween, in particular clamps it therebetween.

The second housing part 3 can have at least one fixing element, such as a locking pin 16, if necessary a plurality of locking pins 16 arranged in a row, on the rear side of the receiving space 4.

Fig. 2 shows a side sectional view of a first process step S1 of manufacturing the lighting device 1. The LED strip 6, in particular the circuit board 8 thereof, is clamped together with the optical conductor 7 and/or is embossed with the optical conductor 7.

Fig. 3 shows a side sectional view of a second process step S2 of manufacturing the lighting device 1. Wherein an adhesive, for example in the form of corresponding adhesive beads KR, is introduced into the adhesive grooves 12 of the first housing part 2 and the second housing part 3, respectively. The adhesive is in particular a UV-curing adhesive.

Fig. 4 shows a side sectional view of a third process step S3 of manufacturing the lighting device 1. In this case, the optical waveguide 7 is clamped to the circuit board 8 and glued to the second housing part 2 (but the adhesive is not yet cured). Specifically, a part of the first light guide 10 is sandwiched with the first housing part 2 via the locking hook 17 of the first housing part 2, and the projection 13 of the second light guide 11 is inserted into the adhesive groove 12 of the first housing part 2 to be adhered.

In a subsequent process step (not shown), the first housing part 2 and the second housing part 3 are joined to one another. For example, this can be done in such a way that the first housing part 2 and the second housing part 3 are glued to one another (but may not yet be cured if necessary) and can be hot stamped or hot riveted. For hot stamping or hot riveting, the first housing part 2 can have, for example, corresponding hot stamped rivets 18. The now joined housing parts 2, 3 already correspond to the arrangement shown in fig. 1.

In a subsequent process step (not shown), the adhesive may be UV cured in order to obtain a finished lighting device 1.

Fig. 5 shows a side sectional view of a part of a vehicle F having the lighting device 1. The lighting device 1 is arranged between the windscreen W and the dashboard I (e.g. locked via the locking pin 16), wherein the lighting device 1 extends between the left and right a-pillars (not shown) of the vehicle F.

The light L emitted from the illumination device 1 into the interior space is perceived by the human eye a as "light" due to the strip-shaped design of the light guide 7 and the light exit opening 5.

Fig. 6 shows a side sectional view of a part of a vehicle with a lighting device 21. The illumination device 21 is designed similarly to the illumination device 1, wherein the light conductor 22 does not enter or only slightly enters the light exit opening 5. As a result, the edges 5a, 5b of the light exit opening 5 protrude more strongly with respect to the light guide body 22, in particular with respect to the second light guide portion 23 thereof, than in the case of the lighting device 1. In particular, the extent of protrusion t1 of edge 5a is between 2mm and 8mm, in particular between 4mm and 5mm, and the extent of protrusion t2 of edge 5b is between 2mm and 8mm, in particular between 4mm and 5 mm. For example, as shown, it may be t1> t 2. However, in principle it can also be t1< t2 or t1 ═ t 2. Therefore, reflection of the light L emitted by the illumination device 21 on the windshield W and/or on the instrument panel I can be avoided particularly reliably.

In particular, the second light guide 23 is no longer required to have the projection 13, and the first housing portion 2 and the second housing portion 3 are no longer required to have the adhesive groove 12. The light guide 22 is held only on the circuit board 8 and the ribs 14, 15 and, if necessary, on the latching hooks 17.

The figures are only schematic representations and are only intended to illustrate the present invention. Identical or equivalent elements have the same reference numerals.

Claims

1. A lighting device for a vehicle, having:

a first housing part (2) made of a first plastic and a second housing part (3) made of a second plastic, which together form an accommodation space (4), the accommodation space (4) having at least one light exit opening (5);

at least one light module accommodated in the accommodation space (4), the light module having at least one light source (9); and

at least one light guide (7; 22) accommodated in the accommodation space (4) and provided for guiding light (L) emitted from at least one light source (9) to at least one light outlet (5),

it is characterized in that the preparation method is characterized in that,

the light guide (7) is a two-component light guide (7) having a transparent first light guide section (10) and a diffuse second light guide section (11; 23) which is optically connected downstream of the first light guide section (10).

2. A lighting device as claimed in claim 1, characterized in that the light exit opening (5) is defined by the two housing parts (2, 3) and the second light guide (11) is fixed in the light exit opening (5).

3. A lighting device as claimed in claim 2, characterized in that the second light guide (11) is fixed in the light exit opening (5) with a form fit, a force fit and/or a material fit.

4. A lighting device as claimed in claim 1, characterized in that an outer edge of the light outlet (5) projects outwards with respect to the second light guide (11; 23).

5. A lighting device as claimed in claim 4, characterized in that the outer edge of the light outlet opening (5) projects outwardly with respect to the second light guide by between 2mm and 8 mm.

6. A lighting device as claimed in claim 4, characterized in that the outer edge of the light outlet opening (5) projects outwards with respect to the second light guide portion by between 4mm and 5 mm.

7. A lighting device as claimed in claim 1, characterized in that the first housing part (2) and/or the second housing part (3) each have at least one rib (14, 15) facing the receiving space (4), which is arranged on the light guide (7).

8. A lighting device as claimed in claim 1, characterized in that the first housing part (2) and the second housing part (3) each have at least one rib (14, 15) facing the receiving space (4) and sandwiching the light conductor (7) therebetween.

9. A lighting device as claimed in claim 1, characterized in that at least one light module (6) and at least one light conductor (7) are firmly connected to one another.

10. A lighting device as recited in claim 1, wherein said first plastic is congruent with said second plastic.

11. A lighting device as claimed in claim 1, characterized in that the light-emitting module (6) has at least one light strip (8) with a plurality of light sources (9) arranged in a row.

12. A lighting device as recited in claim 11, wherein said light source is an LED.

13. A lighting device as claimed in claim 1, characterized in that at least one of the light conductors (7) has a strip-like basic shape and is oriented such that light (L) generated from at least one of the light sources (9) can be radiated into the light conductor (7) at a first narrow side and emerge from the light conductor (7) at an opposite narrow side.

14. A vehicle having a lighting device according to one of the preceding claims 1-13, characterized in that the lighting device is arranged between the windscreen (W) and the dashboard (I).

15. The vehicle of claim 14, characterized in that the lighting device extends continuously between left and right a-pillars of the vehicle.