EP1070911A2 - Motor vehicle headlamp - Google Patents

Abstract

The headlamp has a reflector (2), a light source (3), a lens (5) in front of the reflector in the beam direction and a stop arrangement (20) between the lends and reflector with at least one height adjustable stop (6,7). The stop(s) is associated with a rotatable cam (14,15) and is held on the sliding surface of the cam, which is driven by at least one motor (17) to set the stop in defined positions.

Description

The invention relates to a headlight for vehicles with a reflector, one Light source, a lens arranged in front of the reflector in the direction of light and one between this and the reflector arranged aperture arrangement, which at least one height adjustable Has aperture.

Many vehicle headlights often have an aperture that is adjustable in the vertical direction used, which serves two beam distribution patterns, namely a main beam distribution pattern (High beam) and a secondary beam distribution pattern (low beam). The height of the diaphragm is adjusted approximately by means of a solenoid, the Aperture is locked with a bolt in an end position or at a stop Facility is coming.

A disadvantage of such an embodiment of a headlight is that with one Switching between the two beam distribution patterns often than by the vehicle occupants unpleasant noises such as a click occur. This noise is mostly on the locking process of the panel by means of the bolt attributed. Furthermore, these noises also arise when using a stop for positioning the cover in an end position.

Conventional headlights, as known from the standard installation in motor vehicles can generally only two beam distribution patterns, namely a main beam distribution pattern (High beam) and a secondary beam distribution pattern (low beam) produce. In many situations, for example during a freeway trip, where Relatively high speeds can be achieved, it would be desirable to use a medium one To be able to generate beam distribution patterns with the help of the headlights, with which one Illumination of the roadway adapted to the speed can be achieved, and which furthermore does not cause dazzling oncoming traffic.

DE 42 43 174 A1 a headlight of the type mentioned has become known, in which the diaphragm arrangement from a fixed and one between two end positions adjustable additional aperture. The additional panel has an actuating element and is acted upon by a spring element towards an end position. As a distinctive This headlight has the feature that the spring element is integral with the additional panel is designed as a spring arm protruding therefrom, which is located on a with respect to the additional cover fixed part of the headlamp. In one position the additional diaphragm, the cut-off is formed by the fixed diaphragm while in another end position, the additional screen in sections over the edge of the screen of the fixed aperture protrudes and thus the light-dark boundary of the from the Headlight emerging light bundle forms.

The adjustability of the additional cover is important for the reason that the headlight can be used for both right-hand and left-hand traffic. The adjustment of the additional cover is usually done manually, for example with the help of a screwdriver. The disadvantage of this invention is that, on the one hand, no dynamic, automatic adjustment the additional aperture, for example while driving a car, and on the other hand the Aperture arrangement is also not set up to use different beam distribution patterns to produce a high beam or low beam.

DE 43 35 286 A1 describes a projection headlight for motor vehicles with an im essential elliptical reflector, a light source in a first focal point of the reflector and a projection lens arranged in front of the reflector is described is characterized in that the aperture near a second focal point of the reflector and is arranged in a focal point of the projection lens, the aperture being that of Part of the reflector to the projection lens catches light and is shaped in such a way that there is a distance between the center of rotation of the diaphragm and a point on the peripheral surface the aperture gradually changes along the peripheral surface of the aperture. The aperture is included pivoted about a horizontal carrier shaft. The apex of the aperture is indicated by Rotating the aperture around the horizontal support shaft changed in the vertical direction, causing the distribution of the emitted light beam is controlled. Around the center of gravity of the aperture can align with the center of rotation of the aperture on the aperture Balance weights must be attached.

An object of the invention described in DE 43 35 286 A1 is, in addition to that of Conventional headlights known possibility of a main beam distribution pattern (High beam) and to produce a secondary beam distribution pattern (low beam), also the Possibility to offer other beam distribution patterns, the light-dark boundary should be evenly and continuously changeable in the vertical direction and a sharp cut-off line is to be maintained.

These objects are achieved by the invention described in DE 43 35 286 A1, with the two rotatable diaphragms a large number of different beam distribution patterns can be generated. A disadvantage of the headlight described in DE 43 35 286 A1 However, the fact is that the mechanical design to meet the mentioned tasks very complicated and therefore expensive to buy and also is maintenance-prone.

It is an object of the invention to provide a headlamp in which a height adjustment of panels is possible almost silently.

Furthermore, it is an object of the invention, a structurally simple manner To create headlights with the help of several different beam distribution patterns can be generated, these beam distribution patterns having a sharp light-dark boundary.

These tasks are solved by a headlight of the type mentioned at the beginning that according to the invention the at least one aperture is assigned at least one rotatable cam is, wherein the at least one aperture on a sliding surface of the associated cam is held, and at least one motor is provided for driving the at least one cam is, with the help of the at least one adjustable in height direction aperture in predetermined defined positions can be brought.

The invention provides a headlight for generating multiple beam distribution patterns. For this purpose, one or more diaphragms that can be adjusted in the height direction the beam path of the light emerging from the reflector are brought. That on the The beam distribution pattern projected on the roadway is seen from the height direction generated top aperture. One of the adjustable panels is for generation a sub-beam distribution pattern is provided. The additional panels are for generation of medium beam distribution patterns necessary. By moving all panels in a main beam distribution pattern can be generated at a lower position. For constructive simple design of the headlights are the covers by means of cams in terms of their Adjusted height, the cams being driven by at least one motor. By a appropriate training of the cam shape can ensure that a continuous Transition without disturbing, undesired beam distribution patterns between the individual Beam distribution pattern is possible

By using cams to adjust the height of one or more panels, a almost noiseless switching between the different beam distribution patterns possible. The covers are held in their end positions by means of the cams. In order to can be on a locking of the panels by means of a bolt or a stop and the associated noise development is eliminated.

To the current alignment of the cams and thus the vertical position of the panels too determine, it is advantageous if a feedback is assigned to the at least one motor is.

In one field-tested embodiment of the invention, one motor is for two or more cams provided on a common shaft are provided. By using only a motor for driving the cams sitting on a common shaft can Headlights can be manufactured inexpensively, and can also be used for the headlights necessary space is kept small.

In an expedient embodiment of the invention, the at least one aperture is through Spring force held against the associated cam, advantageously at least an aperture has a scanning nose, by means of which it faces the assigned cam is held.

An advantageous and simple embodiment of the invention is characterized in that that at least two diaphragms are provided and each diaphragm is assigned exactly one cam with the help of which the diaphragms can be adjusted in the vertical direction.

It has proven to be advantageous that the at least one aperture around an axis is pivotally mounted, advantageously at least two panels are provided are pivotally mounted about a common axis.

An embodiment of the invention, with the help of three different beam distribution patterns, namely a main beam distribution pattern, a secondary beam distribution pattern (low beam) and a medium beam distribution pattern (motorway light) are generated can, has two in mutually parallel, substantially vertical planes swiveling screens, a reflector-side screen and a lens-side screen.

The reflector-side diaphragm used to generate the secondary beam distribution pattern has a top edge with two substantially horizontal areas on, with the areas vertically offset from one another and over a beveled area are interconnected.

The lens-side diaphragm, which generates a medium beam distribution pattern, has an im essential horizontal, continuous top edge of the panel.

Finally, it can also be advantageous if the adjustment of the at least one Aperture takes place depending on a vehicle speed. This will make one of the Illumination of the road adapted to the speed, especially in the case of a motorway light, enables.

Fig. 1

eine perspektivische Ansicht eines erfindungsgemäßen Scheinwerfers, bei welchem die Blendenstellung ein Hauptstrahlverteilungsmuster erzeugt,

Fig. 2

eine perspektivische Ansicht eines erfindungsgemäßen Scheinwerfers mit einer Blendenstellung entsprechend einem Nebenstrahlverteilungsmuster,

Fig. 3

eine perspektivische Ansicht eines erfindungsgemäßen Scheinwerfers mit einer Blendenstellung entsprechend einem mittleren Strahlverteilungsmuster,

Fig. 4

eine detaillierte Ansicht von zwei auf einer gemeinsamen Welle angeordneten Nocken,

Fig. 5

eine Vorderansicht eines erfindungsgemäßen Scheinwerfers mit einer Blendenstellung entsprechend einem Nebenstrahlverteilungsmuster,

Fig. 6

eine Vorderansicht eines erfindungsgemäßen Scheinwerfers mit einer Blendenstellung entsprechend einem mittleren Strahlverteilungsmuster,

Fig. 7

eine Vorderansicht eines erfindungsgemäßen Scheinwerfers mit einer Blendenstellung entsprechend einem Hauptstrahlverteilungsmuster,

Fig. 8

ein Nebenstrahlverteilungsmuster, und

Fig. 9

ein mittleres Strahlverteilungsmuster, verglichen mit einem Hauptstrahlverteilungsmuster.

The headlamp according to the invention is explained in more detail below on the basis of an embodiment which has two height-adjustable diaphragms. In this show

Fig. 1

2 shows a perspective view of a headlight according to the invention, in which the diaphragm position produces a main beam distribution pattern,

Fig. 2

2 shows a perspective view of a headlight according to the invention with a diaphragm position corresponding to a secondary beam distribution pattern,

Fig. 3

2 shows a perspective view of a headlamp according to the invention with a diaphragm position corresponding to an average beam distribution pattern,

Fig. 4

a detailed view of two cams arranged on a common shaft,

Fig. 5

2 shows a front view of a headlight according to the invention with a diaphragm position corresponding to a secondary beam distribution pattern,

Fig. 6

2 shows a front view of a headlight according to the invention with a diaphragm position corresponding to an average beam distribution pattern,

Fig. 7

2 shows a front view of a headlight according to the invention with a diaphragm position corresponding to a main beam distribution pattern,

Fig. 8

a sub-beam distribution pattern, and

Fig. 9

an average beam distribution pattern compared to a main beam distribution pattern.

1-3, a headlamp 1 according to the invention with a reflector 2 and a light source 3, for example a gas discharge lamp or an incandescent lamp. The reflector 2 can be an ellipsoidal reflector or the like trade an open space reflector. Such an open space reflector is for example from the AT 404 396 B became known. The light source 3 is held in a version 4. In the direction of light A lens 5 is arranged Y from a front edge 9 of the reflector 2. The Lens 5 is held in a carrier (not shown here) connected to the reflector 2. The headlight 1 has a diaphragm arrangement between the reflector 2 and the lens 5 20 from two pivotable panels 6 and 7, a reflector-side panel 6 and a lens-side aperture 7, on. Both the aperture 6 and arranged on the reflector side the aperture 7 arranged on the lens side is about a common pivot axis 8 in the height direction, d. H. essentially pivotable in the vertical direction. The common Pivot axis 8 is in the embodiment of the invention shown on the front edge 9 of the Reflector 2 attached. The pivot axis 8 is necessarily with the reflector 2 in such a way that when pivoting, for example a dynamic Panning the headlamp 1 as a result of acceleration processes or Compensating loads, the panels 6, 7 their positions in relation to the reflector 2 or on the light source 3 in order to obtain a desired beam distribution pattern produce.

The diaphragms 6, 7 each have a scanning lug 10, 11, each scanning lug 10, 11 on one Sliding surface 12, 13 of a rotatable cam 14, 15 assigned to the respective panel 6, 7 attacks. The scanning lugs 10, 11 on the sliding surfaces 12, 13 are expedient positively guided. A positive control, not shown, prevents the Apertures 6, 7 or their scanning lugs 10, 11 jump from the cams 14, 15. The two Cams 14, 15 sit on a common shaft 16 which is driven by a motor 17 is. This arrangement is shown in more detail in FIG. 4. 4 is a possible one The shape of the cams is clearly visible. The motor 17 has a feedback Determination of the current alignment of the cams 14, 15, with the motor 17 as a rule Servomotor is designed.

In the embodiment of the invention shown in FIGS. 1-3, the two are Apertures 6, 7 in two mutually parallel, perpendicular to the optical axis X. Layers arranged swiveling. In order to image the cut-off line as sharply as possible to enable the lens 5 in the light direction Y in front of the reflector 2 and the diaphragms 6, 7 arranged that their focal point is as exact as possible with the planes of the diaphragms 6, 7 coincides. In order for this to be possible, in the present, practical embodiment the screens 6, 7 are designed as sheet-like components. The expression "sheet-like" however, there should be no restriction with regard to those used for the diaphragms 6, 7 Represent materials - for example, the panels 6, 7 can actually be made of sheet metal, but also made of a suitable plastic, carbon fiber or ceramic be -, but rather describe the shape of the panels 6, 7, which as flat, flat components are formed, the thickness, i.e. essentially their spatial extent in light direction Y, as low as possible, especially with regard to the cross-sectional dimensions the apertures arranged in the beam path. Particular attention will be paid placed on the fact that in the area of the top edges 18, 19, the panels 6, 7, if possible have a small thickness to provide a clear image of the cut-off line in low beam and with a medium beam distribution pattern, such as a motorway light. In a simple way, a small thickness of the panels in the area of the top edges of the panel beveled in this area.

As described above, the screens are generally designed as flat components. It can but also be appropriate - especially when using open space reflectors -, that the panels have a curved shape, which is a curvature the aperture is in the horizontal plane. This curvature may be necessary to get one to achieve a sharp image of the cut-off line.

5 is a front view of the headlight 1 according to the invention with a diaphragm position shown corresponding to a low beam, being behind the Aperture 6 of the reflector 2 is arranged. As in FIGS. 6 and 7, there is the lens 5 not shown in the drawing. The top edge 18 of the aperture 6, which acts as a light-dark boundary HD1 is mapped onto a roadway FB - see FIG. 8 for this purpose two substantially horizontal sections 18a, 18c on an inclined extending section 18b are interconnected. The essentially parallel to A horizontal HH areas of the light-dark boundary HD1 generated by the sections 18a and 18c of the top edge 18, the increase in the light-dark boundary HD1 when changing from an oncoming traffic side GV to its own Traffic side EV, which is typically an angle of about 15 ° to the horizontal HH is achieved by the inclined portion 18b.

While the reflector-side diaphragm 6 is primarily intended for a secondary beam distribution pattern Generating LV1 according to the standards for low beam is the lens side Aperture 7 is provided to generate an average beam distribution pattern LV2, which is shown schematically in FIG. 9. Such a pattern LV2 is represented by an aperture position, 6 in a front view of the headlight 1 according to the invention is achieved. From Fig. 6 it can be seen that for this purpose the lens-side diaphragm 7 an aperture edge 19 with an essentially continuous, horizontally extending Section that has a continuous light-dark boundary HD2 on the road FB maps.

In this context, it should be noted that the positions of the lens and the reflector-side panel can be easily interchanged. A sub-beam distribution pattern is then no longer from the reflector side, but from the lens-side aperture is generated, in this case a medium beam distribution pattern no longer generated by the lens-side, but by the reflector-side aperture.

The aperture position shown in FIGS. 1 and 7 generates a beam distribution pattern according to a high beam. The two panels 6, 7 are located in a lower one End position, so that in comparison to the diaphragm position shown in FIG. 2 or FIG light escaping from the headlight 1 additionally also one above the horizontal HH lying area can illuminate. This one, illuminated above the horizon The area is indicated by the curve HD3. However, the curve HD3 should not be considered understand a sharp transition between a light and a dark area, because with high beam the light distribution in the areas further in front of the vehicle shows no abrupt, but rather a continuous decrease in luminance.

At this point, I would like to go into more detail on those already mentioned above Beam distribution patterns, as shown in FIGS. 8 and 9, are entered. 8 shows a beam distribution pattern LV1 of a low beam. Can be seen a roadway FB, which runs to a vanishing point FP, is also indicated a horizon HH and a vertical direction VV. The essentially illuminated area of the Lane FB is marked with LV1. It shows in the situation shown here of a low beam the light distribution LV1 on the oncoming traffic side GV of the road FB a light-dark boundary HD1, which is below the horizon HH, while the Light distribution LV1 to the traffic side EV of the roadway FB shows an increase and extends to the horizon HH or beyond, the latter not shown here is.

FIG. 9 shows the light distribution LV2 of an average beam distribution pattern LV2. As can be seen here, the light-dark boundary HD2 extends approximately to the horizon HH, which of course means a much better illumination of the roadway FB, in particular on the oncoming traffic side GV. Through this light distribution LV2 on the road FB is good visibility for the driver even at relatively high speeds or the vehicle occupants, without oncoming traffic even at a great distance dazzle.

In contrast to the middle beam distribution pattern, high beam shows a light distribution accordingly curve HD3 in FIG. 9. From FIG. 9 it can be seen that a not insignificant Part of the light distribution is already above the HH horizon, which on the one hand leads to a very good visibility, but on the other hand also to a strong glare of oncoming traffic leads, which are greatly reduced by using the motorway light described can.

8 and 9, the roadway FB is essentially a two-lane road, approximately one Federal road shown. In principle, of course, a medium beam distribution pattern also be designed so that the glare on oncoming traffic on a federal road is kept as low as possible. The main and most effective use of a medium Beam distribution pattern is undoubtedly given when used as a motorway light, since here usually a much higher driving speed than on a federal road prevails and thus in oncoming traffic, the low beam is switched on as it is Federal roads happen, too little illumination of the road brings with it.

The position of the diaphragms 6, 7 for generating an average beam distribution pattern LV2, for example a motorway light, is shown in FIGS. 3 and 6. To this To achieve beam distribution pattern LV2, the lens-side diaphragm 7 is in an upper end position, the reflector-side diaphragm 6, on the other hand, is in a position in which its Upper edge 18 of the aperture 7 with respect to the beam projection onto the roadway FB is completely covered. The light-dark boundary HD2 is thus complete in this case generated by the top edge 19 of the aperture 7. With this aperture position, one can Beam distribution patterns LV2, as shown schematically in FIG. 9, are generated, which a road illumination similar to that of a high beam can be achieved without to show the strong glare of high beam for oncoming traffic.

So that the panels 6, 7 are movable between the different positions, they are on one end mounted on the pivot axis 8, at the other end they each have one Scanning nose 10, 11, which by means of spring force 21, 22 against the sliding surfaces 12, 13 of the assigned cams 14, 15 are pressed. By turning the cams 14, 15 can the diaphragms 6, 7 in a plane perpendicular to the optical axis X, d. H. essentially in the vertical direction. The two cams 14, 15 are on one arranged common shaft 16 which is driven by the motor 17. To one To allow movement of the diaphragms 6, 7 in the vertical direction, the cams 14, 15 are eccentric shaped, as can be seen from FIGS. 1-7. That area of scope the sliding surfaces 12, 13 of the cams 14, 15, which the diaphragms 6, 7 in their lighting technology effective Position, d. H. in the highest position, holds, essentially corresponds to one Circle sector, the center of which lies on the longitudinal axis of the shaft 16. Grabs a tracer 10, 11 on a cam 14, 15 in this circular area, so initially changes when the cam 14, 15 is rotated, the position of the diaphragm 6, 7 is not in the vertical direction. Only when turning further does the scanning nose 10, 11 of the diaphragm 6, 7 gradually enter an eccentric area of the cam 14, 15 and the diaphragm 6, 7 is moved downwards. If the cams 14, 15 are arranged offset from one another, it can be achieved that when the shaft 16 is rotated by means of the motor 17, that aperture, the scanning nose attacks the cam assigned to it in an area with eccentricity, in the vertical direction is moved, but the other aperture, the scanning nose on a circular Attacks the area of the cam, does not experience any movement in the vertical direction. This way and This ensures that there is a smooth, continuous transition between the individual beam distribution patterns is possible without the transition between two Beam distribution patterns cause unwanted interference.

For example, consider an aperture position to produce low beam, such as this is shown in FIG. 5, the scanning nose 10 attacks the reflector-side diaphragm 6 a circular area of the cam 14, while the scanning lug 11 of the lens side Aperture 7 is located in an eccentric area of cam 15. By turning the Wave 16 counterclockwise - when looking in the opposite direction of light Y - the aperture 7 is pivoted upwards until its scanning lug in the circular area the cam 15 arrives. The pivoting movement of the panel 7 has now ended, the panel 7 is at its highest point.

At the beginning of the vertical movement of the diaphragm 7, the scanning lug 10 of the diaphragm 6 still engages circular area of the cam 14, the aperture 6 thus experiences at the beginning of the rotary movement the shaft 16 still no vertical movement. This ensures that not short term undesirable when transitioning from one beam distribution pattern to another Interfering effects, such as the high beam lighting up during the transition from low-beam to low-beam Autobahn light, occur. Only when the aperture 7 has reached its uppermost position gradually begins the downward movement of the diaphragm 6 to a lower position.

When the cams 6, 7 turn clockwise - again starting from the diaphragm position 5 - first moves the lens-side diaphragm 7 into its lower position, while the aperture 6 is still in its height position. Only when the scanning nose 10 If aperture 6 reaches the eccentric area of cam 14, this cam also begins to follow move down, and a beam distribution pattern corresponding to a high beam will generated. This enables a seamless transition from low beam to high beam to be achieved, without having to put up with disruptive effects of an intermediate pattern during the transition. The duration for switching between two different beam distribution patterns is in the order of about 0.2 seconds, so that there is hardly any glare this switching between beam distribution patterns are to be expected.

The height adjustment of the panels can also be done automatically, depending on one Vehicle speed. This makes it necessary to adapt the road illumination possible at the current vehicle speed. Research has shown that the driver's attention especially to those on the light-dark boundary Area of the roadway is directed. It can therefore be useful when driving on a motorway be when the range of the illumination is automatic at a lower speed is reduced, for example, to the driver's attention to that area to steer the vehicle, which is approximately that at the prevailing speed necessary braking distance for stopping in front of an obstacle. The adjustment of the Aperture takes place via electronics known to the person skilled in the art, which are the motor controls according to the vehicle speed and the respective aperture in that position moves, which generates a light distribution corresponding to the speed.

The embodiment of the invention described above is particularly advantageous simple and inexpensive construction. To turn the two cams 14, 15 is a only motor 17 is provided, thereby reducing the manufacturing cost of the invention Headlights can be kept low compared to other headlights.

Another advantageous aspect is that switching between different Beam distribution patterns are essentially silent. This can be attributed to this that the transition between the different aperture positions takes place continuously and the shutters are held in the desired position via the cams become. With other headlights with an adjustable cover, however, the cover snaps in an end position or is moved against a stop, which is often characterized by a unpleasant click noticeable.

Furthermore, it is advantageous that the mode of operation of the invention also extends to three or more Apertures can be used to generate four or more beam distribution patterns can, the cams necessary for height adjustment of the diaphragms in turn on a common shaft can sit and are driven by only one motor. It only has to care must be taken that the cams are shaped accordingly and with regard to their eccentricity are offset from one another so that there is a continuous transition between the individual Beam distribution patterns is possible.

When using more than two panels, it is not absolutely necessary that all Apertures are pivotable about a common shaft. For example, it can also it should be provided that each pair of diaphragms or each diaphragm has its own shaft associated cam is driven. The advantage of using multiple shafts is that when switching between two beam distribution patterns, a brief switch-on an undesirable beam distribution pattern - such as when using three or more apertures, which by means of cams that are on a common driven shaft are arranged, is inevitable -, can be avoided. However, this is one Embodiment is more expensive to manufacture and requires more installation space.

Finally, it should be noted once again that the invention can also be used when only one height-adjustable screen is of great advantage because of the use a cam for moving the diaphragms to switch between two beam distribution patterns - As already mentioned above - almost silent and for the vehicle occupants is no longer perceptible acoustically. When using an aperture can depending on the shape of the top edge of the aperture used, the beam distribution pattern Low beam / high beam or motorway light / high beam can be generated.

Claims (12)

Headlights for vehicles with a reflector (2), a light source (3), a lens (5) arranged in front of the reflector (2) in the direction of light (Y) and a diaphragm arrangement (20) arranged between the latter and the reflector (2), which has at least one height-adjustable screen (6, 7),
characterized in that
at least one rotatable cam (14, 15) is assigned to the at least one screen (6, 7), the at least one screen (6, 7) being held on a sliding surface (12, 13) of the assigned cam (14, 15), and at least one motor (17) is provided for driving the at least one cam (14, 15), by means of which the at least one diaphragm (6, 7) adjustable in the vertical direction can be brought into predefinable, defined positions. Headlight according to claim 1, characterized in that the at least one motor (17) is assigned a feedback. Headlight according to claim 1 or 2, characterized in that a motor (17) is provided for two or more cams (14, 15) seated on a common shaft (16). Headlight according to one of claims 1 to 3, characterized in that the at least one diaphragm (6, 7) is held by spring force (21, 22) against the associated cam (14, 15). Headlight according to one of claims 1 to 4, characterized in that the at least one diaphragm (6, 7) has a scanning nose (10, 11), by means of which it is held against the assigned cam (14, 15). Headlight according to one of claims 1 to 5, characterized in that at least two diaphragms (6, 7) are provided and each diaphragm (6, 7) is assigned exactly one cam (14, 15). Headlight according to one of claims 1 to 6, characterized in that the at least one diaphragm (6, 7) is pivotally mounted about an axis (8). Headlight according to claim 7, characterized in that at least two diaphragms (6, 7) are provided, which are pivotably mounted about a common axis (8). Headlight according to one of claims 1 to 8, characterized by two diaphragms (6, 7) which can be pivoted in mutually parallel, essentially vertical planes, a reflector-side diaphragm (6) and a lens-side diaphragm (7). Headlight according to claim 9, characterized in that the reflector-side diaphragm (6) has an upper diaphragm edge (18) with two substantially horizontal regions (18a, 18c), the regions (18a, 18bc) being offset vertically to one another and over a beveled region (18b) are interconnected. Headlight according to claim 9 or 10, characterized in that the lens-side screen (7) has a substantially horizontal, continuous top edge (19). Headlight according to one of claims 1 to 11, characterized in that the adjustment of the at least one diaphragm (6, 7) takes place as a function of a vehicle speed.

Images