EP1892461B1 - Headlamp for a vehicle - Google Patents

Description

The invention relates to a headlamp for vehicles according to the preamble of patent claim 1.

From the document of the Economic and Social Council of the United Nations ECE / TRANS / WP.29 / GRE2006 / 35 of 21 July 2006 (available at http://www.unece.org/trans/doc/2006/wp29gre/ECE- TRANS-WP29-GRE-2006-35e.doc) is an incandescent lamp designated H15 for a headlamp for vehicles known. The light bulb has a daytime running filament and a high beam filament. The high-beam filament is associated with a diaphragm which serves to shadow a reflector portion of a reflector, wherein the daytime running filament is designed to illuminate the entire reflector. In known two-filament incandescent lamps, a diaphragm is arranged below a filament. If the aperture were arranged below a helix in the H15 bulb as usual, light rays from the high-beam coil would be reflected upwards by the inside of the aperture and then reflected downwards at the reflector. As a result, a perceived as annoying spotty illumination in advance of the vehicle arise.

From the EP 1 667 205 A2 a headlamp for vehicles is known which has an incandescent lamp with a high-beam filament and a daytime running filament. Below the high-beam filament a diaphragm is arranged so that the light is emitted to generate the high beam in the direction of an upper reflecting surface of a reflector and reflected there.

From the FR 2 390 671 A1 a headlamp for vehicles is known with a cup-shaped reflector and an incandescent lamp, wherein the incandescent lamp has a high-beam filament and a Abblendlichtwendel. Above the high-beam filament, a diaphragm is arranged, so that the light beam emitted by the high-beam filament hits only a lower region of the reflector. The light bulb is arranged centrally to the reflector.

The object of the invention is to make a headlamp such that no beams of light are caused by the high beam associated with the aperture, disturbing the front of the vehicle after a further reflection on the reflector or illuminate stained, and that the area distribution between daytime running lights and high beam the lighting Requirements of the lighting function is better adapted.

To solve this problem, the invention has the features of claim 1.

By the invention, the light rays of the high-beam filament reflected on the inside of the diaphragm are directed downward and then reflect the reflector upwards. Upwardly directed light beams are not involved in the illumination of the road, and thus no disturbing light spots in the apron of the vehicle. The fact that the incandescent lamp is arranged by an offset off-center to the reflector, an improved adaptation to lighting requirements of the lighting functions can be achieved.

In most headlamps, two-filament bulbs are placed in the center of the reflector, with the shutter located below a filament coil. In this known arrangement would result in the incandescent lamp with a high-beam filament and daytime running filament (H15 bulb) an unfavorable ratio between the usable area for daytime and driving lights, ie for the high beam is too little surface available, while the daytime running light more area than necessary Has. When moving the bulb downwards to provide more area for the high beam, the reflector at the front edge is tilted so that the top protrudes far forward. However, the lens used today run inclined in the opposite direction. Such an arrangement is possible only with correspondingly large installation depths on the vehicle. In an advantageous development of the invention, these disadvantages can be eliminated if the shadowable by the aperture upper reflector portion has a designed for daytime running reflective surface and the reflector below the designed for daytime running reflective surface designed for high beam lower reflection surface, the upper reflection surface for daytime running lights 25th % of the total reflection surface of the reflector corresponds or seen the lamp opposite to the light exit direction of the reflector and starting from the center of a vertical middle line has an offset upwards of at least 5%, preferably 8 to 12% of the reflector height or the entire lamp envelope opposite to the light exit direction of the reflector seen in the upper Half of the reflector is arranged. By off-center the reflector arranged position of the lamp, the area distribution between daytime running lights and high beam can be adapted to the lighting requirements of lighting functions exactly. Thus, the reflector can be designed so that as much light power for the high beam, but still enough for the daytime running lights available. In this context, it is advantageous if the upper edge of the reflector is arranged offset from its lower edge to the rear of the reflector to the rear. This is only possible by the off-center offset of the bulb upwards and the shape of the reflector, this can be adjusted with its front edge of the inclination of the lens of the headlamp, which extends obliquely backwards to the rear.

The reflector is optically advantageous designed when switched on daytime running the lower reflector portion an arcuate partial light distribution, the arc is opened upwards, and the upper reflector portion generates a partial light distribution, which extends above this and the interior of the arc-shaped partial light distribution fills. In this context, it is advantageous if the upper reflection surface for daytime running light has a daytime running light scattering optics surface which generates a partial upper light distribution, which together with a lower partial light distribution, which generates the lower reflector portion for high beam, a total light distribution for daytime running lights, the light of the daytime running light at the reflection surface at least between 15 ° and 25 °, preferably between 18 ° to 22 ° scatters.

The reflector is torsionally rigid and appealing in appearance when the daytime running surface upper reflecting surface comprises arcuate broad strip portions formed by optical elements and the lower reflecting surface for high beam comprises optical broad strip portions formed by optical elements, the number of adjacent ends being arcuate and vertical extending wide strip portions is the same size.

Fig. 1

in einem vertikalen mittleren Teilschnitt durch einen Scheinwerfer für Fahrzeuge einen Reflektor mit einer Tagfahrlicht- und Fernlichtwendel und mit dem Verlauf der Lichtstrahlen der Fernlichtwendel, wobei oberhalb der Fernlichtwendel eine Blende angeordnet ist,

Fig. 2

in einem vertikalen mittleren Teilschnitt den Reflektor der Figur 1 mit dem Verlauf der Lichtstrahlen der Tagfahrlichtwendel,

Fig. 3

in einer Vorderansicht den Reflektor der Figuren 1 und 2 mit einer mittig angeordneten Aufnahmeöffnung der Glühlampe, nach einer nicht erfindungsgemäßen Ausführung,

Fig. 4

in einer Vorderansicht einen anderen Reflektor eines Scheinwerfers für Fahrzeuge mit einer außer mittig angeordneten Aufnahmenöffnung für eine Glühlampe,

Fig. 5

eine untere Teillichtverteilung, die von dem unteren Reflexionsabschnitt des Reflektors der Figuren 1 bis 3 durch die Tagfahrlichtwendel erzeugt wird,

Fig. 6

eine Gesamtlichtverteilung für Tagfahrlicht, die sich aus der unteren Teillichtverteilung und einer oberen Teillichtverteilung zusammensetzt, die von einem oberen Reflexionsabschnitt des Reflektors erzeugt wird,

Fig. 7

eine Lichtverteilung für Fernlicht, die von dem unteren Reflexionsabschnitt des Reflektors der Figuren 1 bis 3 durch die Fernlichtwendel erzeugt wird,

Fig. 8

in einer Vorderansicht den Reflektor der Figuren 1 bis 3 mit bogenförmigen und vertikalen optischen Streifenabschnitten und

Fig. 9

in einer Seitenansicht den Reflektor der Figur 8.

Reference to the accompanying drawings, the invention is explained in more detail below. Showing:

Fig. 1

in a vertical central partial section through a headlight for vehicles, a reflector with a daytime running and high-beam filament and with the course of the light rays of the high-beam filament, wherein above the high-beam filament a diaphragm is arranged,

Fig. 2

in a vertical middle section the reflector of the FIG. 1 with the course of the light beams of the daytime running filament,

Fig. 3

in a front view the reflector of the FIGS. 1 and 2 with a centrally arranged receiving opening of the incandescent lamp, according to a noninventive embodiment,

Fig. 4

in a front view, another reflector of a headlamp for vehicles with a centrally located receiving opening for an incandescent lamp,

Fig. 5

a lower partial light distribution, which differs from the lower reflection section of the reflector FIGS. 1 to 3 generated by the daytime running filament,

Fig. 6

a total daytime running light distribution composed of the lower partial light distribution and an upper partial light distribution generated by an upper reflecting portion of the reflector,

Fig. 7

a distribution of light for high beam, from the lower reflection portion of the reflector of the FIGS. 1 to 3 generated by the high beam filament,

Fig. 8

in a front view the reflector of the FIGS. 1 to 3 with arcuate and vertical optical strip sections and

Fig. 9

in a side view the reflector of FIG. 8 ,

The headlight for vehicles after the FIGS. 1 and 2 has a pot-shaped housing (not shown) and a front cover of the housing covering translucent cover 16, which is at least partially free of optical elements. Thus, one can see in through the lens 16 through into the interior of the headlight into it. The cover plate 16 is upward to the rear inclined, ie the upper edge of the cover plate 16 is set back relative to the lower edge.

Behind the oblique cover plate 16, a cup-shaped reflector 1 is arranged. The reflector 1 is made of plastic and has at the rear a receiving opening 17 for an incandescent lamp, of which a daytime running light 4, a high-beam filament 3 and a high-beam filament 3 associated trough-shaped aperture 5 is shown. The daytime running filament 4 is arranged between the receiving opening 17 and the high-beam filament 3, wherein the high-beam filament 3 is located on an axis 18, which is the longitudinal axis of the incandescent lamp or the optical axis of the reflector 1, and the daytime running filament 4 is slightly below the axis 18. The trough-shaped aperture 5 is arranged above the high-beam filament 3 and symmetrically to a vertical central line 9. The diaphragm 5 shields an upper reflection surface 7 of an upper reflector section 6. The shielded by the aperture 5 reflection surface 7 is smaller than the reflection surface, which lies above a horizontal surface in which the axis 18 extends. On the adjacent to the upper reflection surface 7 lower reflection surface 8, which may be formed as a free-form surface, the high beam beams 19 are directed, which collects the lower reflection surface 8 to a reaching far into the light beam. The high beam produces a high beam distribution. The high beam beams 19 are almost parallel except for small angular deviations.

The incident on the lower reflection surface 8 light rays 21 of the daytime running light spiral 4 generate because of their defocus to the lower reflection surface 8 an arcuate lower partial light distribution 15, wherein the sheet is open upwards. The upper reflection surface 7 is optimally designed for daytime running lights and the light rays impinging on the upper reflection surface 7 generate a partial light distribution 12, which is arranged substantially above the lower partial light distribution 15. The upper partial light distribution 12 fills in a region of the interior of the arc of the lower partial light distribution 12 and has a bar which extends above the ends of the arc of the lower partial light distribution 15.

The upper reflection surface 7 of the reflector has a plurality of arcuate optical strip sections 13, whose course is adapted to the course of the outer edge of the reflector 1 and / or surrounding the receiving opening 17 concentrically. The arcuate strip sections 13 are each composed of juxtaposed optical elements. The lower reflection surface 7 has a plurality of vertically extending optical strip sections 14, which approach the arcuate strip sections 13. Each end of the arcuate strip sections 13 is assigned at least one vertical strip section 13. For the viewer, the entire reflection surface of the reflector 1 appears like a torbogen and thus there is a harmonious appearance. By appropriate formation of the strip portions, a thin-walled reflector made of plastic may have sufficient rigidity and heat resistance.

In the reflector 1 after the FIGS. 1 . 2 . 8 and 9 the receiving opening 17 is arranged off-center of the reflector 1. The receiving opening 17 is seen against the light exit direction of the reflector 1 offset upwards offset (10). The outer reflector dimensions are between 90 and 110 mm and the offset 10 is about 8 to 12% of the outer reflector dimension. By the offset 10, the entire reflection surface of the reflector 1 can be designed so that the front edge of the reflector 1 as well as the cover plate 16 extends obliquely backwards towards the top. In this case, the front edge of the reflector 1 extend approximately at an equidistant distance from the cover plate 16.

In the reflector not according to the invention 1 of FIG. 3 the receiving opening 17 is arranged centrally in the reflector 1.

LIST OF REFERENCE NUMBERS

1.

reflector

Second

light bulb

Third

High beam filament

4th

daytime running Wendel

5th

cover

6th

upper reflector section

7th

upper reflection surface

8th.

lower reflection surface

9th

vertical line

10th

offset

11th

upper edge

12th

upper partial light distribution

13th

arcuate strip sections

14th

vertical strip sections

15th

lower partial light distribution

16th

lens

17th

receiving opening

18th

axis

19th

High beam radiation

20th

Beam light distribution

21st

light rays

22nd

light rays

Claims (12)

1. Headlamp for vehicles with a paraboloid reflector (1) having a light bulb (2) assigned to the reflector (1) whose bulb points toward the light exit direction of the reflector (1) and which has a high beam filament (3) and a daytime running light filament (4), the daytime running light filament (4) being arranged between the reflector (1) and the high beam filament (3), and the high beam filament (3) having a blind (5) assigned by means of which a reflector section (6) is shaded when the high beam is operated, characterized in that the reflector section (6) is smaller than half of the reflective surface of the reflector (1), and in that the blind (5) is arranged above the high beam filament (3), the reflector section (6) shaded by the blind (5) being arranged in the upper region of the reflector (1), and wherein the light bulb (2) is arranged off-center in the reflector (1) by an offset (10) toward the top of the reflector (1).
2. Headlamp according to Claim 1, characterized in that the upper reflector section (6) which can be shaded by the blind (5) has a reflective surface (7) designed for daytime running light.
3. Headlamp according to Claim 2, characterized in that the reflector has a lower reflective surface (8) designed for high beam light below the reflective surface designed for daytime running light.
4. Headlamp according to one of the Claims 1 to 3, characterized in that the upper reflective surface (6) for daytime running light corresponds to maximally 25% of the total reflective surface of the reflector (1).
5. Headlamp according to one of the Claims 1 to 4, characterized in that the offset (10) toward the top is at least 5% of the reflector height.
6. Headlamp according to Claim 5, characterized in that the light bulb (2) is arranged with an offset of 8 to 12% toward the top.
7. Headlamp according to one of the Claims 1 to 6, characterized in that the entire bulb is arranged in the upper half of the reflector (1) when looked at from the direction opposed to the light aperture direction of the reflector (1).
8. Headlamp according to one of the Claims 1 to 7, characterized in that the upper edge (11) of the reflector (1) is arranged offset toward the back of the reflector (1) relative to its lower edge (12).
9. Headlamp according to one of the Claims 1 to 8, characterized in that the upper reflective surface (7) for daytime running light has an optic surface distributing the light of the daytime running light filament (4) generating an upper light distribution (12), which, together with a lower light distribution (11) generated by the lower reflective surface (8) for high beam light, results in a complete light distribution for daytime running light.
10. Headlamp according to Claim 9, characterized in that the light of the daytime running light filament (4) distributes the light on the upper reflective surface (6) at least between 15° and 25°, and preferably between 18° and 22°.
11. Headlamp according to one of the Claims 1 to 10, characterized in that the upper reflective surface (7) for daytime running light has curved, wide striped sections (13) formed by optic elements and the lower reflective surface (8) for high beam light has vertical, wide striped sections (14) formed by optic elements.
12. Headlamp according to Claim 11, characterized in that the number of the abutting ends of the curved and the vertical stripe sections (13 and 14) is identical.

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