DE19933414B4 - Headlight for motor vehicles - Google Patents

Abstract

A headlamp for motor vehicles having a reflector in the apex portion of which a light source is disposed and a pivotable dimming device for transmitting light from the light source to or from a first reflector portion in a high beam position and in a position for dipped beam is shielded by the light source to this first reflector region emitted light or reflected light from this, characterized in that the screening device is pivotable by an arranged on the reflector edge electromagnetically controllable actuator.

Description

The The invention relates to a headlight for motor vehicles of the type of claim 1.

Such a headlight is for example by the DE 40 02 576 A1 known. In one embodiment of this headlight, the screening device has a cap which is pivotable about a horizontal axis arranged perpendicular to the optical axis of the reflector. The pivoting is effected by a reflector projecting rod-like adjusting element on which the cap is rotatably mounted.

In another, from the DE 40 02 576 A1 emanating embodiment, the dimming device is formed by an opaque aperture which is pivotable about an axis perpendicular to the horizontal axis arranged at the lower edge of the reflector. In practice, this pivoting takes place, for example, by servomotors whose driving force is transmitted to the panel via mechanical elements.

In many cases are mechanical transmission mechanisms susceptible to failure and do not allow without further ado, a very fast switching between the dipped-beam and high beam function.

A motor vehicle headlamp according to the preamble of patent claim 1 is known from DE 100 33 960 A1 known. In the known headlight, however, it is disadvantageous that the stops for defining a position for low beam of a diaphragm of the headlight are rigid. In particular, in so-called projection headlamps, in which the upper edge of the screening device is projected as a cut-off by a lens arranged in the beam path on the roadway in front of the motor vehicle, it may be necessary to eliminate or at least to color fringes emerging from the headlight beam minimize. This is not possible with the known headlights.

Of the Invention is therefore based on the object, a headlight for motor vehicles of the generic type develop in such a way that color fringes in one of the headlights emitted dipped beam on one as possible easy way safe and reliable can be corrected.

Advantages of invention

These Task is at a headlight for motor vehicles of the beginning mentioned Art solved by the features of claim 1.

By the arrangement of an electromagnetically controllable actuator at the bottom Reflector edge adjacent to the axis of rotation of the dimming device a pivoting of the dimming device with only one rotatable stored mechanical element possible. The dimming device is in this way very quickly operable, easy to produce and also susceptible to interference.

Of the Stop for defining the position for the dipped beam of the diaphragm Headlamps can be rigid and allow for fine adjustment the Abblendlichtstellung the aperture be bendable. A fine adjustment the Abblendlichtstellung the aperture, for example, to enable eliminating or minimizing the fringing of the headlight emerging dipped beam to be required.

alternative the stop can also be designed as a set screw. By turning the adjusting screw the dipped beam position can be adjusted the aperture are adjusted. When the dipped beam position is set correctly the shutter, the set screw can be secured against rotation.

Preferably is provided that the pivotable dimming a by the restoring force a return means in her position for Low beam resettable Cover arranged on one side of a rotation axis and one disposed on the other side of the rotation axis of the Actuator operable Actuator. That way you can mechanical transmission elements Completely omitted. The change from dipped beam to high beam function happens by operation of the actuator, causing the actuator and be pivoted with this connected aperture.

The The axis of rotation is advantageously horizontal and at right angles arranged to the optical axis.

at one in particular with regard to the luminous efficacy very advantageous embodiment it is provided that the light source is a gas discharge lamp and that the axis of rotation is below the optical axis in the range arranged the focal plane of a lens arranged in front of the reflector is.

The Position for Low beam of the aperture is by at least one rigid stop defined in the case of a projection headlight for color fringe correction slight is bendable.

An advantageous embodiment provides the actuator is an electromagnet, preferably an electro-lifting magnet.

In In this case, the actuator is a Armature.

Of the Magnetic anchor and the aperture are made of different parts, being for the magnet armature, a magnetic material is used.

advantageously, it is envisaged that at the diaphragm a means of conversion the aperture shape from right to left and vice versa (so-called Tourists solution) is arranged, which pivotable together with the aperture of the beam path is. In this way, a slight change of the headlight for use in countries possible, in which left traffic instead of legal traffic or vice versa prescribed is.

drawing

Further Advantages and features of the invention are the subject of the following Description and the drawing of an embodiment the invention.

In show the drawing:

1 an embodiment of a headlamp according to the invention in vertical center section along the line II in 3 ;

2 a view of the in 1 shown headlights in the direction of arrow II in 1 ;

3 a sectional view of the headlamp along the line III-III in 2 ;

4 a sectional view of the headlight along the line IV-IV in 2 ;

5 a coupling member;

6 the spotlight he cut in sections along line VI-VI in 2 and

7 the headlamp he partially in a section along line VII-VII in 2 ,

description the embodiments

An in 1 illustrated headlight for motor vehicles has a reflector 10 in, in the opening 11 in its apex area a gas discharge lamp 12 is used, which in operation an axial arc 13 having.

In light exit direction 14 after the reflector 10 is a lens 20 arranged. The Lens 20 is for example in one with the reflector 10 connected carrier 15 held.

The of the gas discharge lamp 12 outgoing light rays may be from a dimming device 30 be shielded in the light exit opening 14 after the gas discharge lamp 12 is arranged. The dimming device 30 includes a bezel 32 , which in their Abblendlichtstellung (shown by solid lines), the lower portion of the reflector 10 shields. The aperture 32 is about a rotation axis 33 rotatable at bearings 47 stored. The dimming device 30 is with its axis of rotation 33 in a holder 34 arranged. The holder 34 is at the reflector 10 in a guide 48 pushed in, which is at the bottom of the reflector 10 located. The rotation axis 33 is located slightly below the bottom of the reflector. The dimming device 30 is approximately in the plane of the front edge of the reflector 10 arranged. In its Abblendlichtstellung is the aperture 32 substantially perpendicular to an optical axis 50 of the headlight arranged. In this case, part of the gas discharge lamp 12 outgoing, from the lower part of the reflector 10 shielded from reflected light, leaving only the upper part of the reflector 10 reflected light can escape from the headlight.

In its high beam position (in 1 dashed lines) is the aperture 32 at an angle α from the gas discharge lamp 12 away around its axis of rotation 33 in the light exit direction 14 pivoted so that even light coming from the lower part of the reflector 10 is reflected, can emerge from the headlight.

The pivot angle α depends inter alia on the shape of the reflector 10 and the refractive power and arrangement of the lens 20 in front of the reflector 10 and from the gas discharge lamp 12 , The swivel angle α can be, for example, about 40 ° to 50 °, preferably about 45 °.

The pivoting of the aperture 32 done by an electromagnet 40 as an actor. With the aperture 32 connected is a magnet armature 45 , which in the high beam position of the aperture 32 from the electromagnet 40 is attracted and rests on the pole core (in 1 dashed lines drawn).

The magnet armature 45 and the aperture 32 are movably connected to each other, for example via a coupling member 46 , which is a spatial offset, in particular a vertical height offset between the aperture 32 and the armature 45 balances. The coupling link 46 like in the 1 . 4 and 5 represented as a U-shaped or Z-shaped bent wire spring formed in the armature 45 and in the aperture 32 rotatable ge stores. Alternatively, the coupling member 46 Also be designed as a transverse pin in the armature 45 is inserted and into a hole in the panel 32 intervenes. For the magnet armature 45 is used to produce a sufficiently high magnetic force suitable material.

The aperture 32 is by a return means in the form of a return spring 49 held in their low beam position, so that the low beam position is the starting position. As in particular from 1 shows, is in the low beam position of the aperture 32 the magnet armature 45 from the electromagnet 40 not dressed (in 1 shown in solid line). In this way it is ensured that in case of a defect of the electromagnet 40 or in the event of a power failure at the electromagnet 40 the headlamp is switched to low beam position. The rotation axis 33 is at the bottom of the reflector 10 perpendicular to the optical axis 50 and arranged at least approximately horizontally.

By applying the electromagnet 40 with a current is the armature 45 from the electromagnet 40 tightened, leaving the aperture 32 is pivoted into its high beam position.

The low beam position of the iris 32 is determined by a stop (not shown) to which it comes to rest. The attack can, as in 7 shown at one with the reflector 10 bolted sheet metal part 51 be educated. The sheet metal part 51 may be to allow a fine adjustment of the Abblendlichtstellung the aperture 32 be bendable. A fine adjustment of the dimming position of the aperture 32 For example, it may be necessary to allow elimination or minimization of the fringing of the low beam passing out of the headlamp.

Alternatively, the stopper can also, as in 6 shown as one in the front edge of the reflector 10 screwed set screw 52 be educated. By turning the adjusting screw 52 can the dipped light position of the aperture 32 be adjusted. When the dipped-beam position of the iris is set correctly 32 can the set screw 52 secured against twisting.

In another embodiment (not shown), the dimming device and the electromagnet are 40 arranged as an assembly on a support plate which is displaceable along the optical axis for color fringe correction. This shift takes place, for example, by a reflector 10 arranged guide (not shown). After the color fringe correction, the entire assembly is locked or held by means of tension by a spring.

The aperture 32 has an upper edge, is generated by the light-dark boundary of emerging from the headlamps Abbiendlichtbündels in the low beam position.

The top of the panel 32 indicates on one side of the optical axis 50 a horizontal section 54 and on the other side of the optical axis 50 one from the horizontal section 54 sloping section 56 on. Through the aperture 32 Thus, an asymmetric chiaroscuro border is generated, the on the opposite side a through the section 54 the aperture 32 generated horizontal section and on the own traffic side one through the section 56 the aperture 32 generated, due to the image through the lens 20 has rising portion.

At the aperture 32 is another panel element 58 arranged, which is pivotable. The panel part 58 has an outward over the aperture 32 protruding latch 63 on, at the one in the camp 61 mounted lever 64 attacks.

The aperture element 58 is at least approximately parallel to the optical axis 50 extending axis at the aperture 32 pivoted. In its initial position is the aperture element 58 arranged such that its upper edge 60 below the inclined section 56 the aperture 32 is arranged. In this initial position, the diaphragm element 58 no influence on the light-dark border of the dipped beam exiting the headlight. The aperture element 58 is by a spring 62 , For example, in the form of an omega spring, held in its initial position. By pivoting is the aperture element 58 movable in an active position, in whose upper edge 60 is arranged approximately horizontally and thus higher than the inclined portion 56 the aperture 32 , With the diaphragm element in its active position, the dipped-beam light emerging from the headlight has a continuous horizontal light-dark boundary. Through the aperture element 58 it is possible to temporarily use the headlamp also in another type of traffic, ie right or left hand traffic, as the type of traffic for which the headlamp due to the formation of the aperture 32 is actually provided without dazzling oncoming traffic occurs.

Of particular advantage is that these through the aperture element 58 formed so-called tourist solution with the aperture 32 is pivoted.

Claims (11)

Headlight for motor vehicles with a reflector ( 10 ), in whose apex area a light source ( 12 ) is arranged, and with a schwenkba low beam device ( 32 ), which are in a position for high beam light from the light source ( 12 ) to a first reflector area or from this emerge, and in a position for dipped beam from the light source ( 12 ) shields light emitted to this first reflector region or light reflected therefrom, the anti-dazzle device ( 32 ) is pivotable by a reflector arranged on the edge of the electromagnetically controllable actuator and wherein the position for low beam of the dimming device ( 32 ) by at least one stop ( 51 ; 52 ) is defined at which it comes to rest, characterized in that the at least one stop ( 51 ; 52 ) is adjustable. Headlamp according to claim 1, characterized in that the stop ( 51 ) for its adjustment permanently deformable, in particular bendable. Headlight according to claim 1, characterized in that the stop by an adjusting screw ( 52 ) is formed, which is rotatable in their setting. Headlamp he according to one of claims 1 to 3, characterized in that the pivotable dimming device ( 32 . 45 ) one by the restoring force of a return means ( 49 ) adjustable to its position for dipped beam ( 32 ), which on one side of a rotation axis ( 33 ) and one on the other. Side of the rotary axis ( 33 ), actuatable by the actuator actuator ( 45 ). Headlamp according to one of claims 1 to 4, characterized in that the axis of rotation horizontal and at right angles to the optical axis ( 50 ) is arranged. Headlamp according to one of claims 1 to 5, characterized in that the light source is a gas discharge lamp ( 12 ) and that the axis of rotation ( 33 ) below the optical axis ( 50 ) is arranged. Headlamp according to one of claims 1 to 6, characterized that the actuator is an electromagnet. Headlamp according to claim 7, characterized in that the actuating element is a magnet armature ( 45 ) of the electromagnet ( 40 ). Headlamp according to claim 8, characterized in that the diaphragm ( 32 ) and the magnet armature ( 45 ) are movably connected. Headlight according to claim 8 or 9, characterized in that the diaphragm ( 32 ) and the magnet armature ( 45 ) by a coupling member ( 46 ), by which a spatial offset between the diaphragm ( 32 ) and the magnet armature ( 45 ) is compensated. Headlamp according to one of claims 1 to 10, characterized in that on the diaphragm ( 32 ) An institution ( 58 ) is arranged to change the aperture shape from right to left traffic and vice versa (tourist solution), which together with the diaphragm ( 32 ) is pivotable out of the beam path.