JP2001052509A - Headlamp for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly switch a low beam function from/to a high beam function by making a shade device rotatable with an actuator electromagnetically controllable, arranged in a reflecting mirror periphery. SOLUTION: A shade 32 of a shade device 30 is turnably pivoted in a pivoting portion through a turning pivot 33. The low beam position (a solid line) of the shade 32 is almost vertically arranged to the optical axis 50 of a headlamp. Since a light component emitted from a gas discharge lamp 12 and reflected in the lower part of a reflecting mirror 10 is shielded, only light reflected in the upper part of a reflecting mirror 10 is emitted from the headlamp. In the high beam position (a broke line), the shade 32 is turned on the pivot 33 by an angle α in the separating direction from the gas discharge lamp 12, in the light coming out direction, and light reflected in the lower part of the reflecting mirror 10 is also emitted from the headlamp. The shade 32 is turned with an electromagnet 40 formed as an actuator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headlight for a motor vehicle, which is provided with a reflector, a light source is disposed at an apex region of the reflector, and a turnable shade. A device is provided such that, when the shade device is in the position for the high beam, light from the light source reaches or exits the first reflector region. The position for the low beam is of a type adapted to shield light sent from the light source to the first mirror area or reflected by this mirror area.

[0002]

2. Description of the Related Art Such a headlight is known, for example, from DE-A 400 25 276. In one embodiment of such a headlamp, the shade device has a cap, which is
It is pivotable about a horizontal axis arranged perpendicular to the optical axis of the reflector. This swiveling is effected by a rod-shaped adjusting element passing through the reflector. A cap is pivotally mounted on the adjusting element.

This German Patent Application Publication No. 40
In another embodiment according to EP-A-02576, the shade device is formed by a light-impermeable shade, which shade is perpendicular to the optical axis in a horizontal direction,
It is pivotable about an axis located at the lower edge of the reflector. In practice, such turning is performed, for example, by an adjusting motor. The driving force of the adjusting motor is transmitted to the shade via a mechanical element.

In many cases, mechanical transmission mechanisms are susceptible to failure and do not sufficiently enable very rapid switching between low-beam and high-beam functions.

[0005]

SUMMARY OF THE INVENTION The object of the invention is to improve a headlight for a motor vehicle of the type mentioned at the outset by means of a low-beam function which is technically simple and requires as few components as possible. To provide a headlamp that enables a fast switching between the high-beam function and the high-beam function.

[0006]

SUMMARY OF THE INVENTION In order to solve this problem, according to an embodiment of the present invention, the shade device is pivotable by an electromagnetically controllable actuator located at the edge of the reflector. .

[0007]

By arranging an electromagnetically controllable actuator at the lower edge of the reflecting mirror adjacent to the pivot axis of the shade device, the pivoting of such a shade device can only be pivotally supported. This is made possible by one mechanical element. In this way, the shade device can be operated very quickly, is easy to manufacture and is less likely to break down.

A pivotable shade device having a shade that can be returned to a position for the low beam by a return force of a return means, the shade being arranged on one side of the pivot axis; Advantageously, the pivotable shade device has an actuating element which is arranged on the other side of the pivot axis and can be actuated by an actuator.
In this way, the mechanical transmission element can be omitted completely. The conversion from the low beam function to the high beam function is performed by operating an actuator. Thereby, the operating element and the shade connected to the operating element are swiveled.

It is advantageous if the pivot axis is arranged horizontally and at right angles to the optical axis.

In a particularly advantageous configuration, especially in terms of luminous efficiency, the light source is a gas discharge lamp and the pivot axis is arranged below the optical axis in the region of the focal plane of a lens arranged in front of the reflector. ing.

The position for the low beam of the shade is defined by at least one rigid stop. In the case of a projection headlight, this stop is slightly bendable for color fringing correction.

In another advantageous embodiment of the invention, the actuator is a (reciprocating) electromagnet.

In this case, the operating element is a magnet mover.

The magnet mover and the shade comprise different parts. A magnetic material is used for the magnet mover.

[0015] A device (tourist solution) for switching the shape of the shade from right-hand traffic to left-hand traffic and vice versa is arranged on the shade, the device being able to pivot from the optical path together with the shade. Advantageously. In this way, the headlights are easily switched for use in countries where left-hand traffic is used instead of right-hand traffic, or vice versa.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

The headlight for a motor vehicle shown in FIG. In this reflector, a gas discharge lamp 12 is inserted into an opening 11 provided in the vertex region. The gas discharge lamp has an axial arc 13 during operation.

A lens 20 is arranged behind the reflecting mirror 10 in the light emitting direction 14. The lens 20 is held, for example, on a support 15 connected to the reflecting mirror 10.

The light beam emitted from the gas discharge lamp 12 is
It is shielded by the shade device 30. This shade device 30 is used for the gas discharge lamp 1 in the light emission direction 14.
It is located after 2. The shade device is shade 32
have. This shade 32 shields the lower area of the reflector 10 at its low beam position (shown by the solid line). The shade 32 is pivotally supported at a bearing point 47 via a pivot shaft 33. The turning shaft 33 of the shade device 30 is disposed on the holder 34. The holder 34 is inserted into the guide 48 by the reflecting mirror 10. This guide is located below the reflector 10. The pivot 33 is located slightly below the lower edge of the reflector. Shade device 3
Numeral 0 is disposed substantially in the plane of the front edge of the reflecting mirror 10. The low beam position of the shade 32 is the optical axis 50 of the headlight.
Are arranged almost perpendicularly to. In this case, since the light portion that has exited the gas discharge lamp 12 and is reflected by the lower portion of the reflector 10 is shielded, only the light reflected by the upper portion of the reflector 10 can be emitted from the headlight. it can.

The shade 32 has its high beam position (FIG. 1).
At the angle α),
In the direction away from the gas discharge lamp 12, its pivot 33
, The light reflected by the lower portion of the reflector 10 can also be emitted from the headlamp.

The swivel angle α is in particular related to the shape of the reflector, the refractive power and the arrangement of the lens 20 in front of the reflector 10 and to the gas discharge lamp 12. The turning angle α may be, for example, about 40 ° to 50 °, preferably about 45 °.

The turning of the shade 32 is performed by an electromagnet 40 formed as an actuator. A magnet mover 45 is connected to the shade 32. The magnet mover is attracted at the high beam position of the shade 32 and contacts the magnetic pole core (shown by a broken line in FIG. 1).

The magnet mover 45 and the shade 32 are movably connected to each other via, for example, a connecting member 46. This connecting member compensates for a spatial displacement, particularly a vertical displacement between the shade 32 and the magnet mover 45. The connecting member 46 may be formed as a wire spring bent in a U-shape or a Z-shape, as shown in FIGS. 1, 4 and 5. The wire spring is pivotally supported by the magnet mover 45 and the shade 32. Optionally, the connecting member 46 may be formed as a lateral pin. This lateral pin is inserted into the magnet mover 45 and engages with the hole of the shade 32. For the magnet mover 45, a material suitable for generating a sufficiently high magnetic force is used.

The shade 32 is held in its low beam position by return means in the form of a return spring 49, so that the low beam position is the starting position. As is apparent particularly from FIG. 1, the magnet mover 45 is not attracted by the electromagnet 40 at the low beam position of the shade 32 (shown by a solid line in FIG. 1). In this way, it is guaranteed that the headlamp is switched to the low beam position when the electromagnet 40 fails or when the electromagnet 40 loses current. The pivot axis 33 is provided in the lower area of the reflecting mirror 10 with the optical axis 50.
And at least approximately horizontally.

When power is supplied to the electromagnet 40, the magnet mover 45 is attracted by the electromagnet 40, so that the shade 32 is turned to its high beam position.

The low beam position of the shade 32 is defined by a stopper (not shown). The shade comes into contact with this stopper. This stopper, as shown in FIG.
It may be formed on a thin plate portion 51 screwed to the reflecting mirror 10. This thin plate portion 51 can be bent to allow fine adjustment of the low beam position of the shade 32. Fine adjustment of the low beam position of the lamella 32 is necessary, for example, in order to be able to eliminate or minimize the Farbsaeume of the low beam emitted from the headlight.

As shown in FIG. 6, the stop may optionally be formed as an adjusting screw 52 screwed into the front edge of the reflector 10. By rotating the adjusting screw 52, the low beam position of the shade 32 can be adjusted. When the low beam position of the shade 32 is set correctly, the adjustment screw 52 can prevent rotation.

In another embodiment (not shown), the shade device and the electromagnet 40 are arranged as a component group on a support plate. The support plate is slidable along the optical axis for color fringing correction. Such sliding is performed by, for example, a guide (not shown) arranged on the reflecting mirror 10. After the color fringing correction has been performed, the entire assembly is locked or held by spring tensioning.

The shade 32 has an upper edge. This upper edge creates a light-dark boundary of the low beam emitted from the headlight at the low beam position.

The upper edge of the shade 32 has a horizontal section 54 on one side of the optical axis 50 and a down slope starting from the horizontal section 54 on the other side of the optical axis 50. It has a section 56. As a result, an asymmetric light-dark boundary is generated by the shade 32. This light / dark boundary has a horizontal section on the opposite lane side created by a section 54 of the shade 32 and on its own lane side based on the imaging by the lens 20 created by the section 56 of the shade 32. It has a section that forms an upward slope.

Another shade element 58 that can be turned is arranged on the shade 32. The shade element 58 has a claw 63 that projects outward beyond the shade 32. The pawl 63 has a support 6
The adjustment lever 64, which is supported at 1, operates.

The shade element 58 is supported on the shade 32 so as to be pivotable about an axis extending at least substantially parallel to the optical axis 50. In its starting position, the shade element 58 is arranged such that the upper edge 60 of the shade element is located below the inclined section 56 of the shade 32. In such a starting position, the shade element 58 has no effect on the light-dark boundary of the low beam emitted from the headlight. The shade element 58 is held in the starting position by a spring 62, for example in the form of an Omegafeder. By turning, the shade element 58
Is movable to an operative position. In this operating position, the upper edge 60 of the shade element is arranged substantially horizontally and is thus higher than the inclined section 56 of the shade 32. With the shade element in its operating position, the low beam emitted from the headlight has a consistent horizontal light / dark boundary. The shade element 58 allows the headlight to be driven without dazzling the oncoming vehicle side even in a traffic mode different from the original traffic mode matched when configuring the shade 32 of the headlight, that is, in a right-hand traffic or a left-hand traffic. Can be used temporarily.

Such a so-called tourist solution formed by the shade element 58 (Touristenlo)
It is particularly advantageous if the esung is swiveled with the shade 32.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a headlamp according to the invention, taken along II of FIG.
It is a vertical center sectional view shown along a line.

FIG. 2 is a diagram showing a state in which the headlight of FIG. 1 is viewed in the direction of arrow II of FIG. 1;

FIG. 3 is a cross-sectional view of the headlight taken along line III-III of FIG. 2;

FIG. 4 is a cross-sectional view of the headlight taken along line IV-IV in FIG. 2;

FIG. 5 is a view showing a connecting member.

FIG. 6 is a sectional view partially showing a headlight in which a stopper of a shade is formed as an adjusting screw.

FIG. 7 is a sectional view partially showing the headlight, taken along line VII-VII in FIG. 2;

[Explanation of symbols]

Reference Signs List 10 reflector, 11 opening, 12 gas discharge lamp, 12 arc, 14 light emitting direction, 15 support, 20 lens, 30 shade device, 32 shade, 33 turning axis, 34 holder, 40 electromagnet, 45 magnet mover, 46 Connecting member,
47 bearing points, 48 guides, 49 return springs,
50 optical axis, 51 thin plate part, 52 adjusting screw,
54, 56 sections, 58 shade portion, 60 upper edge, 61 support, 62 spring, 63 pawl, 6
4 Adjusting lever

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Rainer Frank India Bangalore Laheja Resh Denazi Koramangala Flat 706 Ai (72) Inventor Carl-Otto Doppler Germany Reutlingen Lahnstrasse 5 (72) Inventor Marx Muller Germany Garmisch-Partenkirchen Lieserseestrasse 32 (72) Inventor Klaus Nagel Germany Reutlingen sickhardstraße 25 (72) Inventor Rotor Strite Germany Sonnenbuehl Schweigweg 24 (72) Inventor Gerd Bahnmuller Germany Holzgerlingen Neufenwe Talk 8 (72) Inventor Herbert Flavon Germany Eningen Wengen Strasse 89 (72) Inventor Thomas Fabry Germany Neckar Tenzlingen Hafnergasse 3 (72) Inventor Heike Frehrich Germany Reutlingen beli Nostrasse 56 (72) Inventor Hans Daumuller Bodershausen, Germany Karl Benz Strasse 21

Claims (12)

[Claims] 1. A headlight for a motor vehicle, comprising a reflector (10), a light source (12) arranged in a vertex region of the reflector, and a turnable shade. A device (32, 45) for providing light from the light source (12) to the first mirror region or the first mirror region when the shade device is in a position for a high beam; In the position for the low beam, the light transmitted from the light source (12) to the first reflecting mirror area or the light reflected by the reflecting mirror area is shielded. Headlight for a motor vehicle, characterized in that the shade device (32, 45) is pivotable by an electromagnetically controllable actuator located at the reflector edge. . 2. A swivel shade device (32, 45).
Has a shade (32) which can be returned to the position for the low beam by the return force of the return means (49), said shade being arranged on one side of the pivot (33). , Pivotable shade device (32, 45)
2. The headlight according to claim 1, further comprising a control element arranged on the other side of the pivot axis and operable by an actuator. 3. The optical system according to claim 1, wherein the pivot axis is in a horizontal direction, and
3. The headlight according to claim 1, wherein the headlight is disposed at a right angle to the headlight. 4. The light source is a gas discharge lamp (12),
4. The headlight according to claim 1, wherein the pivot (33) is arranged below the optical axis (50). 5. The low beam position of the shade (32) is defined by at least one stop (51; 52) against which the shade (32) abuts, the stop being positioned. 5. The headlight according to claim 2, wherein the headlight is adjustable. 6. The headlight according to claim 5, wherein the stop (51) is permanently deformable for adjusting the stop. 7. The headlight according to claim 5, wherein the stop is formed by an adjusting screw (52), the adjusting screw being rotatable during the adjustment. 8. The headlight according to claim 2, wherein the actuator is an electromagnet. 9. The headlight according to claim 8, wherein the operating element forms a magnet armature (45) of the electromagnet (40). 10. The headlight according to claim 9, wherein the shade (32) and the magnet mover (45) are movably connected to each other. 11. A shade (32) and a magnet mover (45) are connected to each other by a connecting member (46), and a space between the shade (32) and the magnet mover (45) by the connecting member. The headlight according to claim 9 or 10, wherein a deviation is compensated. 12. Shade (32) is provided with a device (58) (tourist solution means) for switching the shade shape from right-hand traffic to left-hand traffic and vice versa, said device comprising: 12. The method as claimed in claim 2, wherein the device is pivotable from the optical path together with (32).
Headlight described in section.