AT509816A1 - HEADLIGHTS FOR VEHICLES - Google Patents

Description

P11620

DESCRIPTION

The invention relates to a headlamp for vehicles with a reflector, a lens and arranged between the reflector and the lens aperture shaft which is adjustable about a horizontal and transverse to the optical axis axis of rotation in two or more rotational positions, and wherein the lateral surface of the aperture shaft for each rotational position has at least one focal line each, which produces a light-dark boundary of a light distribution, the diaphragm shaft between a focal line for a dimmed light distribution and a focal line for a Femlichtverteilung, wherein the focal line for high beam has a smaller normal distance to the axis of rotation , as the focal line for dimmed light, no focal line or no lateral surface has.

Aperture shafts for generating different light images for vehicle headlights are well known. In such aperture waves, often followed by a focal line (or a cladding region having a plurality of such focal lines) for dimmed light, e.g. on a focal line for low beam or on a focal line for motorway light a focal line or focal line area for high beam. This high beam distribution is switched by rotating the shutter shaft about its axis of rotation. There is no optically effective focal line between the region for dimmed light and that for high beam; in practice, the material of the diaphragm shaft is greatly reduced, also in order to reduce the mass of the diaphragm shaft.

Upon rotation of the diaphragm shaft from the position for dimmed light in the position for high beam, the focal line for dimmed light is initially turned away from its position in which it is sharply focused backwards in the direction of the reflector and down. Accordingly, more light enters the exterior and the HeU dark line is no longer sharply displayed. Finally, the diaphragm shaft is rotated to a position in which a Femlichtverteilung is generated. The fact that the focal line for high beam is much lower than that for blended light and thus is not in the focus of the lens or the reflector, this focal line is not sharply displayed in the light image, but this is a desired effect.

A problem which arises from the design of the aperture wave when switching between the dimmed and the high beam is that in the center of the system, i. E. in the middle of the diaphragm shaft - viewed in terms of their longitudinal extent along the axis of rotation - more light can pass through the diaphragm shaft as in the edge region. This is also due to the fact that the reflector basically concentrates the emitted light in a central region. As a result, in the middle of the photograph, above the blurred light-dark line, a bright spot of light arises, which disturbs the photograph and is perceived as unpleasant.

It is an object of the invention to provide a diaphragm shaft mentioned above, in which this light spot does not appear in the light image or is greatly reduced in brightness.

This object is achieved in that according to the invention in a central region of the diaphragm shaft, seen in relation to the longitudinal extent of the diaphragm shaft along its axis of rotation, then to the focal line for dimmed light, one of the focal line for dimmed light and approximately in circumferential or In the direction of rotation of the diaphragm shaft of an imaginary cylinder jacket away projection is provided, wherein the normal distance of the imaginary cylinder jacket to the axis of rotation is less than or equal to the normal distance of the cylindrical surface of the diaphragm shaft, in which that portion of the focal line for dimmed light is, which is the smallest distance to the axis of rotation.

By providing a projection according to the invention, that portion of the light image in which the undesired light spot occurs can be shaded, i. those light rays emerging from the reflector over the central region of the diaphragm shaft, which generate the light spot, are shaded. Due to the special inventive arrangement of the projection within an imaginary cylinder jacket and thus below or maximally at the height of the focus (or the focal line) of the lens, the projection in the light image is not sharply imaged, so that on the one hand greatly reduces the light spot or completely removed, on the other but even no unwanted effects (like a sharp line) are generated.

Preferably, in the circumferential direction away from the focal line for dimmed light, the projection is curved away from the imaginary cylinder jacket in the direction of the axis of rotation.

The projection thus lies with its furthest away from the axis of rotation areas maximum on the imaginary cylinder jacket, and in a progression in the circumferential direction to the focal line for high beam towards the distance of these areas to the rotation axis still decreases. This results in a harmonious course in the light image in the area of the unwanted light spot when the dimmed light is switched to the main beam

In other words, it is advantageous if the front end of the projection (nose) has a smaller distance to the shaft center or to the rotational axis of the diaphragm shaft than the rear end (that end which faces the focal line for dimmed light).

The surface of the projection is not in the focal point or on the focal line of the lens but below or at most at the level of the focal line of the lens.

Furthermore, it is provided in a specific embodiment of the headlight according to the invention that the projection at its base, which is adjacent to the focal line for dimmed light, wider than at its opposite the base, parallel to the focal line for dimmed light edge.

This embodiment reflects the typical shape of the unwanted spot in the light image again, which is also wider in a lower area than in its higher area.

The size of the light spot and, correspondingly, the size of the projection depends essentially on the design of the reflector. Typical values for the extension of the protrusion are about +/- 10 ° at the base, while the "free " End of the projection extends in this case over approximately +/- 4 ° to the left / right. Thus, a light spot can cover at most the same extent. Ideally, the projection should be the same size or slightly larger than the light spot in order to completely cover it. It has been found to be appropriate for the projection to be approximately 1 ° -2 ° larger in comparison to the values for the light spot.

The legs which connect the base to the opposite edge, in a specific embodiment of the invention are substantially rectilinear. Such a shape of the projection can be easily produced and is visually easier to calculate.

The flanks can, if necessary, but also have an inwardly or outwardly curved contour.

Normally, the light spot is symmetrical with respect to the optical axis of the system, and it is accordingly appropriate if the projection with respect to the optical axis of the headlight is also symmetrical

In the following the invention is explained in more detail with reference to the drawing. In this shows

Fig. 1 shows a projection system with an aperture shaft according to the invention in a perspective view obliquely from the front.

FIG. 2 shows the projection system from FIG. 1 with the additional panel removed;

3a is a perspective view of a diaphragm shaft according to the invention in the position for low beam,

3a shows the diaphragm shaft from FIG. 3a and in the position from FIG. 3a, from the front, looking in the direction opposite to the light exit direction, FIG.

3c shows an exemplary low-beam light distribution generated by a projection system from FIG. 1,

4a is a perspective view of the shutter shaft according to the invention in the position for motorway light,

4b is a front view of the aperture shaft in the position for motorway light,

Fig. 4c is an exemplary highway light distribution

Fig. 5a is a perspective view of the shutter shaft according to the invention at "beginning " High beam, i. in an intermediate position when switching to high beam,

5b, the diaphragm shaft in the position of Figure 5a in a front view,

Fig. 5c shows the light distribution at "beginning " High beam,

FIG. 5 d shows a section through an exemplary projection system for correcting the error in the light distribution shown in FIG. 5 c when the high beam is starting, FIG.

5e is a detail view of the diaphragm shaft according to the representation of Figure 5d,

6a is a perspective view of the shutter shaft in the position for high beam,

6b is a front view of the diaphragm shaft in the position of Figure 6a,

6c an exemplary Femlichtverteilung,

7a is a perspective view of the shutter shaft in the position for Teilfemlicht,

7b is a front view of the diaphragm shaft in the position of Figure 6a,

7c shows an exemplary partial high-beam light distribution,

8a is a perspective view of the diaphragm shaft in the position for symmetrical low beam,

8b is a front view of the diaphragm shaft in the position of Figure 8a,

8c shows an exemplary symmetrical low-beam distribution,

9a shows a section through the diaphragm shaft along the line A-A from FIG. 3b, FIG.

9b is a section through the diaphragm shaft along the line B-B of Figure 3b,

9c is a section through the diaphragm shaft along the line C-C of Figure 3b,

FIG. 9d shows a front view of a diaphragm shaft according to the invention with a modification for cornering light headlights with a pivotable lens, FIG.

9e schematically two low-beam light distributions with pivoted lens for cornering light,

10a shows a detailed view of a diaphragm shaft according to the invention in the region of a portion of the diaphragm shaft responsible for partial field light,

10b shows the area from FIG. 10a in an enlarged view,

10c is a schematic representation of a Teilfemlichtverteilung,

10d shows a schematic illustration of grooves in the diaphragm shaft from FIGS. 10a, and

Fig. 10e - 10Ϊ different groove cross-sections.

FIG. 1 shows a vehicle headlight (projection system) 1 with a diaphragm shaft 11 according to the invention. The headlight 1 has a lens 4 (see FIG. 5 d) which is mounted, for example, in a lens holder (not shown). The lens holder and thus the lens 4 may be pivotable about a vertical axis 300. A number of the proposed modifications to the diaphragm shaft 11 according to the invention are also suitable for P11620 *

Projection systems with non-pivoting lens of importance; If a modification is relevant in particular or exclusively for a lens 4 which can be pivoted about a vertical axis 300, this is explicitly indicated in the text.

The headlight 1 further has a light source 4a and a reflector 3, which is installed in the variant shown in an adapter 2 on this adapter 2 are all relevant parts attached, such as a drive means 5 (for example, a stepper motor) for rotating the diaphragm shaft 11 to its axis of rotation 100. The axis of rotation 100 is centered on the diaphragm shaft, ie not eccentric.

The light source 4a or the center of the helix of the light source is mounted in a first focal point of the reflector, the diaphragm shaft 11 is arranged such that focal lines of the diaphragm shaft 11 extend through a second focus of the reflector. The lens 4 is arranged such that a focal point of the lens or its focal line extends through the second focal point of the reflector.

The reference numeral 10 designates the entire diaphragm arrangement in the headlight 1, which also includes an (additional) diaphragm or a shading device 6 in addition to the diaphragm shaft 11. This shader 6 absorbs light rays that would escape below the aperture 11. The upper edge 6 'of the Abschatters 6 preferably extends in height or slightly above the axis of rotation 100 of the shaft.

The diaphragm shaft 11 is rotatably mounted on the adapter 2. For this purpose, in the variant shown, the adapter 2 forms a part of a bearing shell 8 and the shading 6 the second part 7 of this bearing shell. A ball bearing 9 for the axis of rotation 100 of the diaphragm shaft 11 is held in this bearing shell.

The storage can in principle also directly, so without ball bearings, take place on the adapter, e.g. via a clip connection, etc. When using suitable materials, the wear on the adapter caused by the rotation of the shaft can be minimized.

The shaft itself may consist of temperature-resistant plastic, ceramic, metal and the like.

FIG. 2 shows once more the arrangement from FIG. 1, with the shading device 6 removed.

The diaphragm shaft 11 is adjustable in two or more rotational positions about the horizontal and transverse to the optical axis 200 axis of rotation 100, wherein the lateral surface 12 P11620 * ♦ «t ··· ♦ · ♦ · • + * 99 · ·« · · · For each rotational position, at least one focal line in each case is provided for the diaphragm shaft 11 which generates a light-dark boundary of a light distribution.

For example, FIG. 3a shows a region of the lateral surface 12 with a plurality of bridging lines 20 for producing a dimmed light distribution in the form of a low beam and with a plurality of focal lines 21 for producing a dimmed light distribution in the form of a motorway light. Furthermore, it can be seen a focal line 22 for generating a Femlichtverteilung.

In Figure 3b, it can be seen that the aperture shaft 11 is in a position in which one of the focal lines 20 is active for low beam, i. This focal line generates the light-dark boundary of the light distribution in the light image. FIG. 3c shows a corresponding low-beam light distribution 1000 with light-dark boundary 1001.

FIG. 4a shows the shaft 11, as shown in FIG. 3a, rotated a little further, so that one of the focal lines 21 for another dimmed light distribution, e.g. Motorway light is active. FIG. 4 c shows such a highway light distribution 2000 with the light-dark boundary 2001, which is generated by the focal line 21.

Aperture shafts for generating different light images for vehicle headlights are well known. Due to the extent of such a diaphragm shaft extending in the light exit direction, in contrast to a flat diaphragm, which has a negligible extent in the light exit direction (small thickness, thin diaphragm), the problem arises that light reflected by the reflector is directed into an upper diaphragm. reaches undesirable area of the lateral surface of the diaphragm shaft and is emitted from there as unwanted scattered light, which may lead to glare or legally not allowed values in the photograph, is emitted into the outer space. This problem also exists with thin aperture shafts with a small diameter, since these also have a certain extent in the light exit direction.

In particular, this problem occurs in dimmed light distributions. "Grayed out " Light distribution are, for example, low beam (symmetrical, asymmetrical), motorway light, city light. These light distributions are e.g. defined in the ECE / SAE regulation.

The problem of unwanted scattered light is discussed in the US 2009/0154187 Al, which shows a diaphragm mentioned above. The shutter shaft shown in this document has grooves which are spaced apart from each other over a part of the cladding Μ ·· > ················································································································································································································ However, it has been found that the problem of stray light with dimmed light distributions can not be satisfactorily resolved even with such a diaphragm.

In order to solve this problem, so that the legal light values for dimmed light can be achieved or (almost) no undesired scattered light comes, the lateral surface 12 of the diaphragm shaft 11 in the region of at least one focal line 20, 21 for dimmed light grooves 30th , 31, 32, 33, 34, 35, which run approximately parallel to the axis of rotation 100 of the diaphragm shaft 11, wherein viewed in the rotational or circumferential direction of the diaphragm shaft 11, adjacent grooves 30,31; 31, 32; 32.33; 33.34; 34,35 directly adjacent to each other and by a common edge 40, 41, 42, 43, 44 are separated from each other. These grooves can be seen in Figures 3a and 4a and shown in particular in Figure 8a and in detail in Figures 9a, 9b and 9c.

The diaphragm shaft 11 shown in the figures has areas for dipped beam as well as motorway light, accordingly, it is favorable if the ribs are provided in both areas as shown.

The ribs "capture" light coming from the top of the shutter shaft too steeply. and, for example, scattered back into the headlight, so that it can no longer come to unwanted scattered radiation or this can be significantly reduced (Figures 9a - 9c). FIG. 9a shows a beam which impinges on a region of the lateral surface of the diaphragm shaft which is smooth, ie has no grooves, this beam is deflected into the outer space of the headlight, while the beam striking the ribs is directed back into the headlight. "Desirable", light coming to the shutter shaft shallower is either absorbed by the shutter or passes through the focal line in the outer space, so that a light-dark boundary (HD boundary, HD line) corresponding to the optically effective focal line in the current position the aperture is imaged in the photograph. The ribbing on the lateral surface does not lead to a fully-focused HD line. As a rule, the shutter shaft drive can not position it so accurately that always an edge between two ribs is part of the focal line, but the shutter shaft can also be positioned in an intermediate position between two edges (ie there is no edge in the optically optimal position in which it would be sharply imaged). This results in a slightly washed-out, no longer very sharp HD line, which is cheaper for the eye anyway, so this is not a problem PI1620 > ···· ··· · ··········· On the contrary, it is even beneficial.

Furthermore, the shaft may have a black, light-absorbing surface, which further reduces the stray light.

The diaphragm shaft 11 faces circumferentially, i. Seen in the direction of rotation, in a defined rotation angle range δ (Figure 8a, Figure 9a), a lateral surface 12 having a configuration for forming a focal line area for a plurality of focal lines 20,21 for dimmed light, wherein a plurality of grooves in this rotation angle range δ of Lateral surface 12 are arranged.

Theoretically, exactly one (sharp) focal line would be sufficient, provided that the drive for the diaphragm shaft would always position it precisely. However, since this is unrealistic, the angle of rotation range, in which there are focal lines for dimmed light should be at least slightly greater than the positioning accuracy of the drive.

But in order to obtain sufficient process reliability, it is advantageous to make the rotation angle range even larger, as well as other errors (in addition to the inaccuracy in positioning) can occur. If a stepping motor is used, it may lose steps during operation and is permanently wrong, for example by 1 °, until the next referencing (referencing, for example, when the vehicle is put into service). By a sufficiently large rotation angle range, in which the focal lines are the same type, this step loss but is not a problem.

An accurate positioning of the diaphragm shafts would be possible only with very accurate and correspondingly expensive drives, but what is not necessary after the above and the headlight would only unnecessarily expensive. Namely, since the aperture shaft has a plurality of adjacent focal lines of the same kind (that is, a plurality of low-beam focal lines, etc.), it is only necessary to produce the dimming beam so that the dimming shaft is positioned so that one of the dimming beam focal lines is active.

The required focal lines are distributed on the "lateral surface of the diaphragm shaft. For example, with 6 types of focal lines, each type has a 60 ° segment of the lateral surface (with even distribution, other distributions possible). Using only a small angular range for one type of focal line, one has much useless surface on the mantle of the diaphragm shaft, which is unfavorable. Therefore, it makes sense to take advantage of full 60 ° for a focal line, which also gains operational safety. TU -i / Λ | Ί · * * · · »- * · * F11620 * ·· ····· * · · · · · · · · · · ······················································ ·· * · -10-

In Figure 8a, e.g. the angle range for dimmed light is denoted by δ, which is composed of an angular range = 51, in which there are focal lines for low beam, and a range ö2 with focal lines for motorway light

The minimum diameter of the shaft is mainly defined by the height of the HD line in high beam. In a specific headlamp with a particular lens, it is necessary to use e.g. to produce a high beam 6 ° high above H-H, a diaphragm shaft with at least 12 mm diameter. Add to this is still the space that takes the axis of rotation to complete. Assuming 5 mm diameter for the rotation axis (rotating shaft), the diaphragm shaft reaches a diameter of about 17 mm.

According to the invention adjacent grooves adjacent to each other directly and are separated by an edge. As a result, there is little or practically no lateral surface between the grooves, which could produce unwanted scattered radiation.

This situation is shown in detail again in FIGS. 9a-9c, which show sections through the diaphragm shaft 11 according to FIG. 3b corresponding to the lines A-A, B-B and C-C.

It is advantageous if the edges 40,41,42,43,44 are sharp edges. So it should be strived to produce as sharp edges as possible, i. produce as sharp-edged transitions between adjacent grooves in order to produce as little scattered radiation. In practice, this sharp-edged course, of course, set certain limits, depending on the material more or less rounded edges can be formed, so rounded transitions between the grooves, in which case then seek to make the corresponding radii small.

The edge 45 delimits the last groove 35.

It is simple in manufacturing and also in terms of optical calculations if the grooves 30, 31, 32, 33, 34, 35 are parallel to each other as shown.

In principle, the grooves may also be along a curved curve, e.g. corresponding to the focal line of the lens, which is also curved, run. This can achieve the best optical effect in the form of a sharper HD line, but the production is very complex.

The grooves 30, 31, 32, 33, 34, 35 are preferably arranged in a substantially central region 12m of the diaphragm shaft 11, viewed along the rotation axis 100 (see FIG. 11). »» # • «· • ·

FIG. 8b). The reflector "concentrated" the light substantially in a central region, so that the strongest scattered radiation originates essentially from the middle region of the diaphragm shaft. It is therefore not absolutely necessary to provide grooves outside the central area of the diaphragm shaft, and blackening of the shaft is generally sufficient in these areas.

It can be seen again in FIG. 3b and FIG. 4b that the dimmed light focal lines 20, 21 each have a first focal line section 20a, 21a, which runs in a straight line and parallel to the axis of rotation 100, and a second focal line section 20b, 21b, which likewise runs in a straight line and parallel to the axis of rotation 100. The two sections 20a, 20b; 21a, 21b are connected via a third focal line section 20c, 21c extending rectilinearly and obliquely to the axis of rotation 100, and the first focal line section 21a has a greater normal distance from the axis of rotation 100 than the second focal line section 20b.

The grooves 30,31, 32,33,34, 35 extend, starting from the focal line section 20c extending obliquely to the axis of rotation 100; 21c, over a distance d in the first and / or the second focal line portion 20a, 21a; 20b, 21b, preferably into both focal line sections, as shown.

The distance d of the extension into the focal line sections 20a, 21a; 20b, 21b into approximately corresponds to an angle range of +/- 10 ° (measured from the center of the light source). Basically, however, this numerical value depends on the reflector, this has a small maximum, i. a strong concentration of light in the middle, then an extension of 10 ° may well be sufficient. If the reflector has a very wide maximum range, more than 30 °, e.g. 45 ° on both sides necessary.

With regard to the reduction of scattered radiation, it is optimal, if the grooves 30, 31, 32, 33, 34, 35 also have the oblique focal line section 20 c; 21c fully enforce.

FIG. 5d shows a vertical section parallel to the optical axis through a projection system according to the invention, and FIG. 5e shows an enlarged section of the diaphragm shaft 11. FIG. 5e shows the grooves according to the invention in a section corresponding to FIG. 5d in detail. With regard to the optical properties to be achieved, it is advantageous, as shown, for a groove 30, 31, 32, 33, 34, 35 to be at least sectionally-i.e. at least in one section along its longitudinal extension (parallel to the axis of rotation), in each case of two oppositely facing one another at an angle γ. • fl fl t t t t t t · · · · · · · · · · · · · den den den den den den den den den den den den den den den den den den den den preferably formed at least partially as planes εΐ, ε2 is formed. A light beam coming from above can thus be optimally reflected from one plane of the groove to the other plane of the groove and finally reflected back into the headlight.

The two planes of a groove can intersect one another pointedly, i. the converging surfaces are formed as planes up to their cutting area. As a rule, the "levels" but rounded transition region, this results in the production, so go in a continuous shape into each other, as can be seen well in Figure 5e. Basically, these are not mutually converging planes, but rather converging surfaces, which are partially formed as planes and deviate from the plane shape in their transition region. Optically, there are sharp transitions, but in fact this is irrelevant to the function. Grooves with rounded transitions are easier to produce in terms of manufacturing technology (easier demoulding).

It is also advantageous in terms of manufacturing technology if the front plane ε2 of a groove 30, 31, 32, 33, 34, 35 seen in the light exit direction runs at a larger angle to the lateral surface 12 than the rear plane εΐ of the groove. With regard to the production, in particular the rear plane εΐ important, which should be at a shallower angle to the jacket, while the front plane ε2 should be as steep as possible to the lateral surface from an optical point of view, whereby as much stray light is destroyed.

In this case, that angle is meant which lies between the considered plane and the tangential surface on the lateral surface, which tangential surface contains the cutting line, which results when cutting the considered plane with the lateral surface.

The angle between two planes of a groove itself, for example, is approximately 45 ° in the focal line range for motorway light and, for example, approximately 90 ° in the focal line range for low beam (FIG. 5e).

Returning again to FIGS. 4a and 4b, it can further be seen that, in the region of the lateral surface of the diaphragm shaft in which the focal lines for dimmed light are in the form of motorway light, an edge 43, 44 separating two grooves 33, 34, 35 is at the same normal distance to the rotation axis 100 as the first low beam focal line portion 21a and parallel to the rotation axis 100 extends.

On the other hand, in the area of the lateral surface of the diaphragm shaft, in which the focal lines for PI 1620 * ··· * * * • • • • m · · · * · · · · · · · · · · · · ····· Dimmed light in the form of low beam, has a two grooves 30, 31, 32, 33 separating edge 40,41,42 at least in sections a greater normal distance from the axis of rotation 100 on as the first low-beam focal line section 20a, as can be clearly seen in particular in FIGS. 3a and 3b as well as FIGS. 8a and 9c. It is advantageous if the edges 40, 41, 42 initially parallel to the rotation axis 100 with the same normal distance as the first focal line portion 20a for dimmed light and then increase over an oblique edge portion to the edge portion with a greater normal distance from the rotation axis 100 ( Figure 9c). The entire line is defined by legal regulations.

In the specific embodiment of the diaphragm shaft shown, the two above-mentioned areas of the lateral surface of the diaphragm shaft are arranged one behind the other in the direction of rotation, so that it is possible to switch from low beam to highway light by rotating the diaphragm shaft.

Due to the different distances of the edges as described above, the different gradients of the light-dark lines 1001, 2001 for low-beam light 1000 and highway light 2000, too, result.

As can be seen from the figures, a plurality of edges 43, 44 are provided with the same and a plurality of edges 40, 41, 42 with a greater normal distance to the rotation axis 100 than the first focal line portion 20a, 21a for dimmed light, so undesirable in the areas dimmed lights Stray light can be avoided. A particularly accurate positioning of the diaphragm shaft is not necessary. The angle lt x between two edges (see FIG. 9b) corresponds approximately to the positioning accuracy of the drive used, which is approximately 2 ° in the case of specific drives used.

The angle can also be chosen larger, in a specific embodiment, this is about 5 ° and was chosen so that at a position of the diaphragm shaft exactly in the middle of two grooves, the light image is still acceptable. The drive positions more accurately.

Starting from a diaphragm shaft 11 in a position corresponding to FIGS. 3a and 3b, which generates a low-beam light distribution (FIG. 3c), mm reaches a highway light distribution as shown in FIG. 4c by turning the shaft into a position according to FIG. 4a / 4b.

If the diaphragm shaft 11 is rotated to a position as shown in FIGS. 6a and 6b, the light distribution is from a dimmed light distribution (in this case a highway light distribution) to a light distribution 4000 with a light-dark boundary 4001. ····························································································································································································································································

The light-dark boundary is formed by the focal line 22 of the aperture wave, and the cut-off in this case is not sharply imaged in the light image, which is desirable and results from the fact that the focal line 22 of the aperture 11 is already well below the focal line of the lens is located.

The focal line 22 for the high beam is symmetrical to a plane extending in the light exit direction vertical surface and extends in a concave arc. The focal line 22 for high beam also has a smaller normal distance to the axis of rotation 100 than the focal line 21 for dimmed light

The main beam 22 for the main beam and the last dimming line 21 for the dimmed light are more than 90 ° in the direction of rotation, typically even more than 120 ° apart.

Between this last focal line 21 for a dimmed light distribution 2000 and the focal line 22 for a high beam distribution 4000, the diaphragm shaft has no focal line or lateral surface, i. it is located between this focal line no or little aperture material above the axis of rotation, but in any case at a greater distance from the focal line of the lens than the focal line for high beam van the focal line for high beam distance.

It thus follows a focal line (or a cladding region with several such focal lines) for dimmed light, e.g. on a focal line for low beam or on a focal line for motorway light a focal line or focal line area for high beam. This Femlichtverteilung is switched by rotating the aperture shaft about its axis of rotation. There is no optically effective focal line between the region for dimmed light and that for high beam; in practice, the material of the diaphragm shaft is greatly reduced, also in order to reduce the mass of the diaphragm shaft.

Upon rotation of the diaphragm shaft from the position for dimmed light in the position for high beam, the focal line for dimmed light is initially turned away from its position in which it is sharply focused backwards in the direction of the reflector and down. Accordingly, more light gets into the exterior and the light-dark line is no longer sharply displayed. Finally, the diaphragm shaft is rotated into a position in which a Femlichtverteilung is generated, in which therefore the focal line 22 is optically active (Figure 6a, Figure 6b). The fact that the focal line 22 for high beam is much lower than that for dazzled light and thus not in the focus of the lens or the P11620

-15-

Reflector is located, this focal line is not sharply displayed in the light image, but this is a desirable effect.

A problem which arises from the design of the aperture wave when switching between the dimmed and the high beam is that in the center of the system, i. E. in the middle of the diaphragm shaft - viewed in terms of their longitudinal extent along the axis of rotation - more light can pass through the diaphragm shaft than in the edge region, This is also related to the fact that the reflector basically focuses the exiting light in a central region. As a result, in the middle of the photograph, above the blurred light-dark line, a bright spot of light arises, which disturbs the photograph and is perceived as unpleasant.

This light spot is shown in FIG. 5 c and designated by reference numeral 3002.

So that this light spot 3002 does not appear in the light image or is greatly reduced in brightness, it is provided according to the invention that, viewed in a central region of the diaphragm shaft 11, with respect to the longitudinal extension of the diaphragm shaft 11 along its axis of rotation 100, then to the focal line 21 for dimmed light, a projecting from the focal line 21 for dimmed light and approximately in the circumferential or direction of rotation of the diaphragm shaft 11 of an imaginary cylinder jacket 50 away projection 60 is provided, wherein the normal distance of the imaginary cylinder jacket 50 is less than or equal to the Ehehachse 100 as the normal distance of the cylindrical lateral surface 51 of the diaphragm shaft 11, in which that portion of the focal line 21 for dimmed light, which has the smallest distance from the axis of rotation 100.

The projection can be easily recognized in FIGS. 3 a, 3 b, 4 a, 4 b as well as in FIGS. 5 a and 5 b. FIGS. 5a and 5 show an intermediate position of the diaphragm shaft 11 when switching between dimmed light and main beam with projection 60 traveling in the beam path. FIG. 5d shows the projection 60 in a vertical section through the headlight, and FIG. 5e shows an enlarged view of the shaft in the region of FIG Projection 60, which also shows the relationships with respect to the cylinder jackets 50,51

By providing a protrusion 60 according to the invention, that portion of the light image in which the undesired light spot 3002 occurs can be shaded, i. those light rays emerging from the reflector over the central region of the diaphragm shaft, which generate the light spot, are shaded.

FIG. 5 d shows a beam S 1 which is shadowed by the diaphragm shaft 11 even without a projection 60. Higher emitting rays S2 - S4, which would produce the light spot 3002, are prevented from exiting the headlamp by the projection 60, while the higher but flat outgoing beam S5, which is non-critical in the light image, can easily exit the shaft ,

Due to the special inventive arrangement of the projection within an imaginary cylinder jacket 50 and thus below the focus (or the focal line) of the lens, the projection 60 is not sharply imaged in the light image, so that on the one hand greatly reduces the light spot or completely removed, but on the other hand No unwanted effects (like a sharp line) are generated.

The projection 60 lies with its optically effective surface maximum on height of the imaginary cylinder jacket 50, i. that no point of the projection 60 has a greater distance from the axis of rotation 100 than the imaginary cylinder jacket 50.

Preferably, in the circumferential direction away from the focal line 21 for dimmed light, the projection 60 is curved away from the imaginary cylinder jacket 50 in the direction of the axis of rotation 100, as can be clearly seen in FIG. 5e.

The projection thus lies with its farthest from the Ehehachse remote areas on the maximum imaginary cylinder jacket, and in a progression in the circumferential direction to the focal line for high beam towards the distance of these areas to the rotation axis still decreases. This results in a harmonious course in the light image in the area of the unwanted light spot when switching from dimmed light to high beam

In other words, it is advantageous if the front end 62 of the protrusion (nose) has a smaller distance to the shaft center or to the rotation axis of the diaphragm shaft than the rear end 61 (that end which faces the dimmed light focal line).

The base 61 of the nose 60 is thus at a maximum level of the focal line of the lens or below and is inclined towards the end 62 towards the axis of rotation of the aperture shaft.

Furthermore, it is provided in a specific embodiment of the headlight according to the invention that the projection 60 at its base 61, which is adjacent to the focal line 21 for dimmed light, wider than at its the base 61 opposite, parallel to the focal line 21 for dimmed light edge 62nd (Figure 5a, 5b). -17- • · P11620

This embodiment reflects the typical shape of the unwanted spot in the light image again, which is also wider in a lower area than in its higher area.

The size of the light spot and, correspondingly, the size of the projection depends essentially on the design of the reflector. Typical values for the extension of the protrusion are about +/- 10 ° at the base, while the "free " End of the projection extends in this case over approximately +/- 4 ° to the left / right. Thus, a light spot can cover at most the same extent. Ideally, the projection should be the same size or slightly larger than the light spot in order to completely cover it. It has been found to be appropriate for the projection to be approximately 1 ° -2 ° larger in comparison to the values for the light spot.

The legs 63, 64, which connect the base 61 with the opposite edge 62, in a specific embodiment of the invention are substantially rectilinear. Such a shape of the projection can be easily produced and is visually easier to calculate.

The flanks can, if necessary, but also have an inwardly or outwardly curved contour.

Normally, the light spot is symmetrical with respect to the optical axis of the system, and accordingly it is expedient if the projection 60 is also symmetrical with respect to the optical axis 200 of the headlight 1.

It should also be noted that the projection 60 is not directly in the focus of the lens and thus not "sharp". is shown.

Upon further rotation of the diaphragm shaft 11, the light distribution (FIGS. 6a-6c) leads to a position of the diaphragm shaft for generating a partial field light distribution 5000 with the course of the light / dark boundary corresponding to reference numeral 5001 (FIG. 7c). The course of the focal line 23 for generating such a partial field light distribution can be seen in FIGS. 7a and 7b. Depending on the rotational position of the shaft, the right shadow area can be varied in the range. The two horizontal, dashed lines with a distance (double arrow) to illustrate this. This is possible because the individual focal lines in the region 12a of the lateral surface of the diaphragm shaft have different normal distances from the axis of rotation 100. PI 1620 • *

-18-

Thus, as shown in FIGS. 7a and 7b, the diaphragm shaft 11 has a section of the lateral surface 12 for producing one or more focal lines 23 for partial field light. Each of the focal lines 23 for partial light has a first rectilinear focal line section 23a, which lies in a first jacket region 12a of the aperture shaft 11, which in rotational or. Circumferential direction of the diaphragm shaft 11 curved, e.g. is cylindrical. As already mentioned, the individual focal lines in the region 12a of the lateral surface of the diaphragm shaft can have different normal distances to the axis of rotation 100, as a result of which the right-hand shadow region can be varied in its height.

A second rectilinear focal line section lies in a second, for example, essentially flat, jacket region 12b of the diaphragm shaft 11, the second jacket region 12b being at a smaller distance from the axis of rotation 100 than the curved jacket region 12a. The two jacket regions 12a, 12b are connected to one another via a jump surface 12c. The jacket region 12b then rises towards the edge of the diaphragm shaft, as can be seen from the figures.

The jump surface 12c is flat in the variant shown. A flat jump surface has the advantage that the bright-dark line in the shaded area can be raised or lowered by twisting the diaphragm shaft (for this purpose, the lateral surface must be designed accordingly with differently high focal lines), but at the same time the transition to the Femlichtbereich in the Teilfemlichtverteilung remains unaffected ie In this area, the light distribution does not change when the diaphragm shaft is rotated. In addition, the jump surface 12c is preferably perpendicular to the rotation axis 100 for the reason mentioned above, as can also be seen in FIGS. 6a and 6b.

Aperture shafts which inter alia have one or more focal lines for partial illumination are known, e.g. from EP 2 157 362 A1, but here with a curved jump surface. For partial illumination, the normal " Femlichtverteilung a range of light distribution hides / shaded, in which there are vehicles or people. For example, if the vehicle is driving with a light distribution, e.g. due to high speed on the highway, and it appears on the own roadway in front of the vehicle a vehicle, so only the area of the light distribution can be darkened, in which this emerged vehicle is located. A dimming as usual is not necessary in this case. Likewise, by means of partial-field light in oncoming traffic, this area in which the oncoming traffic vehicle is located can be darkened, while the remaining area of the light distribution corresponds to the "normal" traffic. Femlichtverteilung is illuminated. PI1620 PI1620 * ·

* * · * * * * «« ♦ • * · · · »# -19-

To achieve such a light distribution, a diaphragm shaft has at least two focal line sections or two lateral regions as described above. In the vertical direction, the two focal line sections merge into one another via a jump. Inevitably, as a result of the spatial extent of the diaphragm shaft in the light exit direction, there is thus a step surface in the diaphragm shaft which, depending on the specific design of the focal lines for partial remote light, can be designed to be curved or as known from EP 2 157 362 A1.

In a flat, flat aperture such a jump in the focal line for the photo is unproblematic. In the case of a diaphragm, on the other hand, as a result of the spatial extent of the diaphragm and the jump surface resulting therefrom, unwanted effects appear in the light image; in particular, unwanted shading effects occur in the far-field light of the partial-field light distribution, especially in the transition to a vertical HD light at the transition between the shaded area and the Femlichtbereich.

FIG. 7c shows the desired light image 5000 of a partial light distribution with the light-dark boundary 5001 without undesired effects in the light image. In fact, however, the jump surface produces undesirable effects, namely shading near the vertical line in the cut-off line. Partial light distribution 7000 having such an effect is shown in Fig. 10c, namely, the cross-hatched area in the light distribution schematically represents that part in the light image 7000 which is shaded.

The light-dark boundary 7001 'of the partial field light distribution 7000 differs from that of FIG. 7c in that here the shaft is in a slightly different rotational position, with a lower right shadow area and a shadow area extending farther to the right; the shadow area extending farther to the left is controlled by the headlight bend function, e.g. achieved by pivoting the lens. However, this is noted only marginally, the problem actually shown as crosshatched in Figure 10c results in basically every position for partial high beam.

According to the invention, the diaphragm shaft 11 is now modified in such a way as to reduce or completely eliminate these unwanted shadows in the focal region of the partial light distribution by providing one or more depressions 70 in the jumping surface 12c.

By means of these recesses 70 on the jump surface 12c, light rays that are otherwise blocked and can not enter the exterior space can be controlled in the outer PI 1620 PI 1620 • *

Bel Φ »·· room and illuminate the otherwise undesirably shaded area. The jump surface 12c with the depressions 70 is shown in detail in FIGS. 10a and 10b.

Optionally, light rays can reach the outside area of the headlamp into the area to be illuminated if the at least one recess 70 is designed to extend in the light exit direction, in particular if the aperture shaft is in a rotational position in which a focal line for partial field light is optically effective. ie whose focal line is imaged in the light image as an HD line (the light-dark line being sharply imaged only in that area in which light is shaded).

It is particularly advantageous in the production and for the controlled passage of the desired light rays when the one or more depressions 70 are designed as elongated, continuous depressions 70 directed in the light exit direction, as can be seen in FIGS. 10a and 10b. Oblong means that the depressions are longer than they are wider; the recesses are formed in the form of grooves 70 in the jump surface 12c; the edges or areas between two grooves are at the same height as the rest of the jump surface.

Preferably, the at least one recess 70 extends from a front, the reflector 3 facing away from the end 78 of the diaphragm shaft 11 toward the rear in the direction of the reflector 3 facing the end 79. A entering into a recess / groove light beam can pass through the depression in this way and on End 78 of the recess 70 emerge from this and get into the outer space of the headlamp (Figure 10b).

In a specific embodiment of the invention, it has been found that it is optimal for an illumination of the undesired shadowed area when the at least one recess 70 extends to approximately in the middle M - seen in the light exit direction - the jump surface 12c diaphragm shaft 11 extends.

A straight line G, as shown in FIG. 10b, which delimits the grooves 70 towards the center, results from cutting a plane which passes through the rotation axis 100 of the diaphragm shaft 11 and an optically effective focal line for partial light in the region of the curved lateral surface 12a runs. Grooves are not necessary behind this line G since they do not produce a lighting effect.

In a specific embodiment of the invention, the elongated depressions 70 P11620 • * • • • • • ·· * + * ·

-21-seen in the light exit direction increasing cross-sectional areas Q on, as e.g. Figure lOd shows. For example, the grooves become wider toward their free, lens-facing end.

Furthermore, it can be provided that at least two adjacent elongated depressions 70 adjoin one another directly. The recesses / grooves are separated in this case by a sharp edge or by a rounded transition (the highest point of the transition is on the jump surface or is part of the jump surface). Figures 10e and 10f show such grooves with sharp-edged transitions.

Additionally or alternatively, it can also be provided that at least two adjacent elongated recesses 70 are spaced from each other. The groove-shaped recesses are separated by a distance, which can also vary along the grooves. In general, the area between the recesses in this case is flat (in the case of a flat jump surface), or it is again provided a rounded transition.

The distance between two grooves may change along the length of the grooves, see Figure 10d, as the cross sections Q increase.

Rounded region between the grooves 70 is shown in FIG. 10g, while FIGS. 10h and 10i show grooves with surface transitions.

Furthermore, in one embodiment of the invention, it is provided that the elongated depressions extend parallel to one another. However, the depressions can also run apart, for example, in the direction of the lens.

In a variant of the invention may also be provided that the recesses 70 are at least partially formed differently deep, see, e.g. Figure 10f.

Furthermore, it can be provided that an elongated depression 70, viewed over its length, has different depths.

For example, the groove becomes deeper toward the lens. The grooves may be less deep on the reflector side than on the lens side.

Furthermore, it can also be provided that different elongated depressions have different depths. • · P11620 ·· * # ···· ·· -22-

Different grooves need not be equally deep, but here too there may be variations, e.g. It has been found that it can be advantageous if the deepest groove at the top, i. is arranged with the greatest distance to the axis of rotation (Figure lOf). In addition, of course, the depth of a groove vary over its length.

In the vertical direction, the recesses 70 extend in the jump surface 12c over a range which corresponds to about one third to two thirds of the height of the jump surface. The "height" The jump surface is the normal distance between the second lateral surface 12b and the highest focal line in the first lateral surface 12a.

In order not to produce any undesired lighting effects in the light distribution, it has proven to be advantageous if the region over which the recesses 70 extend in the jump surface 12c, of the first lateral surface 12a and / or the second lateral surface (12b), preferably of both Lateral surfaces 12a, 12b is spaced.

The grooves extend approximately equally far up and down. The whole surface is not provided with grooves. The grooves are preferably located approximately in the middle third of the surface. If the entire surface were to be scored, the effect of a light concentration in the darkened region would occur, in particular above the cross-hatched region in FIG. 10c.

As already mentioned, a partial light distribution can still be moved horizontally by means of a curve light function (pivoting of the lens or of the entire module) of the headlight. As a result, the range of functions is further increased. It may also be possible to further vary the height of the entire light image by means of the LWR function (LWR = headlamp leveling control) of the headlamp.

FIGS. 8a and 8b show a straight, continuous focal line 24 of the diaphragm shaft, and the light image 6000 with associated light-dark boundary 6001 generated therewith is shown in FIG. 8c. The symmetrical light distribution shown here can be used for example for a tourist solution or as city light (at low speeds).

Finally, FIGS. 9d and 9a show a further modification according to the invention on the diaphragm shaft 11, which is particularly important in the case of (dynamic) cornering light. This modification is shown only in these figures, for example, in Figures 9b and 9c, this is not shown.

To generate a dynamic cornering light, the lens 4 can be rotated about a vertical axis PI 1620 · · · οι · · · · · · · · ·

-23-300, which preferably passes through the focal point of the lens 4 and a focal point of the reflector 3, are pivoted to the left and right.

For generating a dynamic cornering light, it is known to make the lens of a projection headlight about a vertical axis to the left and right pivot. By pivoting the lens and the light image is pivoted in accordance with the steering angle.

If a diaphragm arrangement is located in the beam path, it has been found that, in particular in a position of the diaphragm arrangement for producing low beam or dimmed light, the pivoting of the lens generally leads to undesirable effects in the light distribution, which occur particularly on the side of the lens Oncoming traffic, where a larger part of the light distribution is shaded, show. In the case of a headlight for a right-hand drive vehicle, in particular with a pivoting of the lens to the left, that is to say in the direction of oncoming traffic, such undesired effects in light distribution leading to dazzling oncoming traffic occur.

FIG. 9e shows a low-beam figure 1000 '(light-dark boundary 1001') with a cross-hatched area 1002 ', which would be illuminated as a result of a pivoting of the lens and could possibly dazzle oncoming traffic.

According to the invention, the diaphragm shaft 11 which extends in the circumferential direction, i. seen in the direction of rotation, in a defined rotation angle range 5, a lateral surface 12 with a configuration for forming a focal zone for two or more focal lines 20, 21 for dimmed light, wherein a focal line for dimmed light at least a first focal line section 20a, 21a for generating a bright-dark boundary of a light image on the oncoming traffic side and at least a second focal line section 20b, 21b for generating a light-dark boundary of a light image on the vehicle side, in a region of the at least one first focal line section 20a, 21a of a dimmed light focal line at least one projection 80 opposite these first focal line sections 20a, 21a of adjacent focal lines 20, 21 for dimmed light.

The elevation 80 represents a modification of the lateral surface of the diaphragm shaft and thus of the focal line, and one or more further focal lines 20 'result with sections 20a', 20b ', 20c' and 20d '. While focal line areas 20b 'and 20c' are substantially the same as those of adjacent portions 20b, 20c and 21b, 21c, respectively, portion 20a 'is only partially substantially the same as portion 20a or 21a and

The region 20a 'is then modified in the region of the elevation 80 to form a deviating focal line section 20d' ,

Points of the focal line 20d 'in the region of the elevation 80 have a greater distance from the axis of rotation 100 than the other points of the focal line of this focal line section, and the distance of these points to the axis of rotation of the diaphragm shaft increases when approaching the edge R of the diaphragm shaft ,

When the lens is swiveled in the direction of the side which does not have an elevation 80 (in the case of a right-hand traffic light, the negative effects resulting from a pivoting of the lens to the left, the elevation is applied to the right-hand side) can be determined by the elevation 80 are hidden by the unwanted unwanted light fading out, so that even when pivoted lens results in a law-compliant light image.

Turning the shaft to a position (another dimming position of the shaft) where the elevation comes in the beam path, this cross-hatched area can be cut off from a lighting.

This clipping can be done dynamically, since the disturbances only occur with cornering light and depend on the tilt angle of the lens (the negative effect in the light image increases with increasing tilt angle of the lens). With low lens pivoting, only a smaller part has to be cut off, so the crosshatched triangle runs flatter and the projection on the shaft does not have to be completely in the beam path.

Accordingly, it may be advantageous if the elevation 80 seen in the longitudinal direction of the diaphragm shaft 11, as shown in Figure 9a and 9d, starting at a distance from the center of the diaphragm shaft 11, to the edge R of the diaphragm shaft 11 increases.

By rising to the edge elevation increasing with increasing tilt angle of the lens disturbance in the photograph can be compensated.

The elevation 80 or its focal line 20d 'is no longer sharply imaged in the light image. The farther outward you look at the wave, the fuzzier it becomes, because the focal line of the lens is not a straight line but a curve. The same applies to the survey. P11620 ························································································································································ ·····························································································.

In a specific headlamp with a focal line for asymmetrical low beam, the first focal line section 20a, 21a for the light-dark boundary of the light distribution on the oncoming traffic side runs straight and parallel to the axis of rotation 100, and a second focal line descent 20b, for a dimmed light focal line 20, 21. 21b for the bright-dark boundary on the vehicle side also runs straight and parallel to the rotation axis 100, wherein the first focal line portion 20a has a greater normal distance to the Eirehachse 100 than the second focal line portion 20b. In the first focal line section, the elevation 80 is provided according to the invention; in the second section no survey is provided.

In another symmetrical low beam headlamp, the first focal line bright-dark boundary portion and a second hard-dark boundary focal line portion on the vehicle side form a continuous straight line parallel to the orbital axis of the aperture shaft. In such a headlamp is provided that in each case at least one survey is provided in both focal sections, so that it can be used both in right and left traffic as low beam headlamps with pivoting lens to produce a dynamic cornering light.

The symmetrical dipped beam serves as a city light or as a tourist solution. Especially with a tourist solution surveys can be provided on both sides. As a result, the disturbing (not permitted) beams are hidden when driving through left and right curves.

In a variant of the invention, it is provided that the distance at which the elevation begins is approximately as far away from the center of the diaphragm shaft as corresponds to 5 ° in the light image of the light distribution (FIG. 9e). This is the area from which the first undesired light effects in the light image typically result when the lens is pivoted, which can be correspondingly compensated for with a survey that starts in this area. Basically, however, the elevation can already begin in the middle of the shaft (the center of the shaft with respect to the longitudinal extent of the shaft along the axis of rotation results from the intersection of a vertical plane through the optical axis with the diaphragm shaft), or even substantially further start outside.

Furthermore, as shown provided that the survey 80 has its greatest distance from the axis of rotation 100 in the edge region or at the edge R of the diaphragm shaft 11. If the vehicle drives into a curve, the shutter shaft is slowly (dynamically) rotated so on, that the survey comes ever further into the beam path. This is not done PI 1620 * · • ·

··· Φ ··································································································································································································· At full steering angle (about 15 ° - 20 °) is then the entire survey with its highest points in the beam path.

Accordingly, it is expedient if the elevation is arranged such that its highest points are imaged on the edge or shortly before reaching the edge of the light distribution. For example, the maximum of the survey could be imaged in a range of about 45 ° in the light distribution.

Except for the tilt angle of the lens, angles refer without exception to the projected light image. How these angle data in the photo then represent on the shaft itself, depends on the lens used.

For example, the elevation 80 rises linearly toward the edge R.

It is fundamentally important that the lateral surface of the diaphragm shaft in a region for producing a dimmed light figure has at least one "normal". Has focal line without survey and at least one focal line with a survey. The survey is on the one hand only in a (counter to the direction of oncoming traffic) pivoted lens necessary, i. when cornering, the focal line is activated with the survey, while driving straight ahead, the survey is not needed and is even disturbing because it would then cut off parts of the light distribution, which are necessary to meet the specifications of the photograph.

For manufacturing reasons - a single focal line with survey is difficult to produce - is now provided that the survey 80 in the circumferential direction has a spatial extent (Figure 9a). The survey 80 is therefore not in the form of a narrow focal line, but the survey has in the rotational or circumferential direction of the shaft to an extent.

This is not only important in terms of manufacturing, but also in terms of the photograph. Typically, the spatial extent will not be realized in a step-like elevation, but over a continuous increase in the circumferential direction to its highest points (ridge). Correspondingly, a connection of the elevation with a pivoting of the lens can take place "smoothly", without abrupt jumps in the light distribution.

In the above sense, it is therefore also when in section planes through the survey 80 normal to the axis of rotation 100, the survey is convexly curved. It is particularly advantageous if PI 1620 * ft ft * • • • • ft • ft • 9 ft • ft • ft • ft ft * * The convex curvature corresponds to a segment of a circle, since the same results are achieved even if the drive is positioned inaccurately by the drive can. A circle segment is also easy to manufacture. The curvature could also be elliptical.

Furthermore, a trapezoidal course would be conceivable, but the feasibility then depends on the positioning accuracy of the drive.

In a variant of the invention, which allows a simple control of the diaphragm shaft, it is provided that the normal in sectional planes through the survey 80 on the axis of rotation 100 at the highest points of the survey 80 at a projection in a horizontal plane through the axis of rotation 100 a straight line form.

This means, if one connects the highest points of the cuts along the longitudinal extent of the wave - these form the ridge of the elevation - that these lie on a straight line; this straight line is preferably parallel to a focal line for dimmed light and in particular preferably parallel to the axis of rotation.

However, it can also be provided that the cutting planes through the elevation 80 normal to the axis of rotation 100 at the highest points of the survey 80 in a projection in a horizontal plane through the axis of rotation 100 form a curved curve.

In a specific embodiment of the invention is further provided that the survey over the entire first focal line section or - in a headlight for right and left traffic - over the entire focal line extends (not shown).

The distance in which the elevation starts from the center of the diaphragm shaft (viewed in the longitudinal direction) is therefore zero in this case.

In a variant of the invention, the highest points of the survey all the same distance from the axis of rotation 100 of the diaphragm shaft 11. The elevation is thus essentially formed as a straight line, i. one or more straight focal line (s) for dimmed light is higher, that is, farther from the axis of rotation than the others, "normal". Burning lines for low beam, which are activated when driving straight ahead.

The exact contour of the survey depends mainly on the reflector design. It is also conceivable a stepped survey. Or a rising from the middle of the wave outward first and then falling again survey. P11620 ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••

The bill presented here complies with legal requirements such as ECE (Europe), SAE (USA, Canada) and JIS (Japan).

Vienna, 2 April 2, 2010

Claims (4)

Claims 1. A headlamp (1) for vehicles with a reflector (3), a lens and a diaphragm shaft (11) arranged between the reflector (3) and the lens, which axis of rotation (15) extends around a horizontal axis and transverse to the optical axis (200). 100) in two or more rotational positions is adjustable, and wherein the lateral surface (12) of the diaphragm shaft (11) for each rotational position at least one focal line (20, 21, 22) which a light-dark boundary (1001, 2001, 4001) of a light distribution (1000, 2000, 4000), wherein the diaphragm shaft (11) between a focal line (21) for a dimmed light distribution (2000) and a focal line (22) for a Femlichtverteilung (4000), wherein the focal line (22 ) has a smaller normal distance to the axis of rotation (100) for the high beam than the focal line (21) for dimmed light, no focal line or no lateral surface, characterized in that in a central region of the diaphragm shaft (11), in With respect to the longitudinal extension of the diaphragm shaft (11) seen along its axis of rotation (100), adjacent to the dimmed focal line (21), from the dimmed light focal line (21) and approximately in the circumferential direction of the diaphragm shaft (11) of an imaginary cylinder jacket (50) away extending projection (60) is provided, wherein the normal distance of the imaginary cylinder jacket (50) to the rotation axis (100) is less than or equal to the normal distance of the cylindrical lateral surface (51) of the diaphragm shaft (11 ), in which that portion of the focal line (21) for dimmed light, which has the smallest distance to the axis of rotation (100). 2. Headlight according to claim 1, characterized in that in the circumferential direction of the focal line (21) for dimmed light running away the projection (60) of the imaginary cylinder jacket (50) in the direction of rotation axis (100) is curved away. 3. Headlight according to claim 1 or 2, characterized in that the projection (60) at its base (61) which is adjacent to the focal line (21) for dimmed light, is wider than at its base (61) opposite, to Burning line (21) for dimmed light parallel edge (62). 4. Headlight according to claim 3, characterized in that the legs (63, 64) which connect the base (61) with the opposite edge (62) extend substantially rectilinearly. PI1620 ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• • * • • e · »« -30-5. Headlamp according to one of claims 1 to 4, characterized in that the projection (60) is symmetrical with respect to the optical axis (200) of the headlamp (1). Vienna, 2 Z April 21) 10