DE10033960A1 - Car headlamp has devices for horizontal movement of screen transversely to optical axis selectively into two positions with different light-dark boundary profiles - Google Patents

Abstract

A car headlamp has a light source (11), and a movable screen (50) between an ellipsoid reflector (20) and a collector lens. Devices (80-83) are provided for the horizontal movement of the screen transversely to the optical axis of the headlamp in order to bring the screen selectively into two positions, i.e., into a first position in which the edge of the screen is located on the radiation path of the light beams to form a light beam with the light-dark boundary according to the first profile and into a second position in which the edge of the screen in relation to the first position is displaced to form a light beam with a light-dark boundary according to a second profile.

Description

The present invention relates generally to motor vehicles Ellipsoid type headlights.

Such a headlight conventionally comprises one Light source, an ellipsoid reflector, the first focal point near the light source, a converging lens, whose focal plane near a second focal point of the Reflector runs, as well as a cover plate of the headlight fers.

In some cases, the lens can pass through the cover plate itself be educated.

Should such a headlight be a light beam with bright Generate a dark border, for example a low beam or a fog light beam, it has one between the light source and the lens arranged aperture that the part of the Shields radiation that would otherwise be above this light Dark border would spread.

A difficulty with this type of headlight is that the profile of the cut-off line is difficult to change leaves. Such a change is particularly important Consider if a headlight, for example for right traffic is conceived as a bundle of light with a cut-off line for left-hand traffic.

It may also be desirable to have a universal headlamp fers run, the optionally a low beam, a Fog light bundle or a light bundle without a cut-off line can generate.

A known solution for changing the profile of the The cut-off line is based on interventions on the aperture of the  Headlights to make the profile of the cut-off line to change.

An ellipsoid headlight is also known from EP 0 780 624 known, which has a diaphragm with an edge that a first special profile of a cut-off line for that emitted light bundle forms, as well as means for pivoting the Aperture in either two positions in its vertical plane, in a first position, in which the edge of the diaphragm on the beam path of the light rays is arranged to a Beams of light with the cut-off line according to this first To form profile, as well as in a second position in which the Edge of the diaphragm arranged in the beam path of the light rays is according to a light beam with a cut-off line to form a second profile.

Another solution to optionally create a fade lights or a high beam in a universal headlight Ellipsoid reflector is also based on the pivoting of the movable Aperture of the headlight to this inside or outside the to arrange emitted light beam.

This is already an ellipsoid headlight with a bezel known between a low beam and a high beam position about a substantially horizontal axis parallel to the optical axis pivots.

The cover is on one part of the headlight frame on one the sides pivoted; the pivoting movement of the Aperture is such that it is always transverse in the vertical plane remains to the optical axis in which it is in the low beam light position.

Such a headlamp has several disadvantages.

With such an arrangement of the aperture, which is under consideration inspection of the small space available below the panel within the headlamp housing around an axis parallel to  optical axis is pivotable, it is initially impossible to Aperture on its axis of rotation completely from the emitted To remove light beams.

If the headlamp is set to high beam, this indicates emitted light bundles thus a reduced light intensity on, because part of the aperture on its axis of rotation is always on the The beam path of the emitted light beams remains.

The pivoting cover is attached to only one side also causes poor equilibrium distribution Aperture that is not held on the other side.

Such an arrangement requires pivoting aperture finally the use of a voluminous, powerful Actuator to ensure that the bezel with the desired speed from the high beam position in the Low beam position returns.

The present invention therefore proposes a new universal headlights of the ellipsoid type in front, optionally several Can perform light functions such as low beam for right or left-hand traffic or fog light and high beam, d. H. on Headlamp, which optionally has a light beam with light-dark Limit for right-hand or left-hand traffic or a fog light bundle or generate a light beam without a cut-off line can, in the case of high beam, the movable aperture their arrangement completely from the emitted light beam is removed and in which the space required by the Betä Adjustment of the position change of the aperture is optimized.

In particular, according to the invention is a motor vehicle registration certificate projector provided with a light source, an ellipsoid Reflector, its first focus near the light source is a converging lens with a focal plane close to one second focal point of the reflector, and one between reflectors gate and lens provided movable panel with an edge,  which is a first special profile of a cut-off line for forms the emitted light beam.

The headlight is characterized in that means for horizontally moving the diaphragm transversely to the optical axis of the Headlights are provided to choose the bezel optionally in two Bring positions, in a first position, in the the edge of the aperture on the beam of light rays is arranged around a light beam with the cut-off line according to the first profile and in a second position, in which the edge of the screen ver in relation to the first position sets in the beam path the light rays is arranged to Beams of light with a cut-off line according to a second To form profile.

According to further advantageous, non-limiting features of the headlight according to the invention:

• - The means for moving the aperture include a manual one Actuating pin, which is connected to the panel and with a return spring to retrieve the bezel from the second in the first position is provided;
• - The means for moving the diaphragm include an actuation pin, one end with the bezel and the other end with an electromagnet provided with a return spring is connected, wherein the electromagnet is designed to a power supply to operate the pin so that the pin moves the bezel from the first to the second position emotional;
• - The translatory movement of the diaphragm takes place via a Distance of about 10 mm;
• - are means for selectively swiveling the aperture in two Positions provided in the first position and a third Position where the edge of the bezel is essentially out  is arranged half of the beam path of the light rays To form light beams without a cut-off line;
• - Can the aperture around a substantially horizontal axis swivel transversely to the optical axis of the headlight;
• - The aperture has a leaflet, which is fixed with a wave connected, which can rotate in two bearings, which in a frame part of the bill firmly connected to the reflector throwers are trained;
• - are in for swiveling the panel from its first position their third position means for actuating the diaphragm hen, which comprise an actuating pin, one end of which the bezel and its other end with one with a return spring-provided electromagnet is connected, the Electromagnet is designed to be supplied with Power the pen to operate so that the pen is facing the bezel pivots from the first to the third position;
• - The cover is fixed in the form of a counterweight connected leaflet so formed that it is heavy Point that is in the first position below the Pivot axis so that the aperture tends to to take the first position;
• - It includes at least one attached to one of the camps L-shaped stop with one in the plane of the swivel axis se the bezel extending forward into the headlamp horizontal part, and one above the pivot axis of the Aperture extending vertical part, the horizontal Part defines the third position of the aperture and the vertical Part of the first and second position of the aperture;
• - The first and second positions of the aperture are the positions for low beam in right-hand traffic, left-hand traffic or for Fog light, and the third position of the aperture is a distance light position.

The following description clarifies with reference to FIG the accompanying drawings are exemplary and not restrictive kend the subject of the invention and its embodiments.

Fig. 1 shows a schematic exploded perspective view of an embodiment of the inventive SEN headlamp

Fig. 2 to 4 show schematically a perspective view of the headlamp 1 divisional applications of FIG. Ver in three different illumination positions,

Fig. 5 is a horizontal axial sectional partial schematic view showing a second embodiment of to the invention OF INVENTION headlamp

Fig. 6 shows a front view of part of the headlamp from Fig. 5 in two different lighting positions

Fig. 7 is a schematic front view showing a third embodiment of the headlight according to the invention,

Fig. 8 is a vertical axial sectional schematic view showing the headlamp shown in Fig. 7,

Fig. 9 shows schematically in perspective view three quarters of a preferred embodiment of a frame intermediate piece of the headlamp according to the invention.

It should be noted in advance that the same or similar parts so far possible in all drawings with the same numbers are marked and are not described again each time.

In the drawings, a motor vehicle headlight is Darge includes a lamp 10 which is mounted in the rear wall of an ellipsoidal reflector 20 so that the filament 11 of the lamp is near a first focus of the reflector 20 .

The headlamp further comprises a converging lens 75 which is attached to a part of the frame 40 of the headlamp which is fixedly connected to the reflector.

The focal plane of the lens 75 runs in the vicinity of the second focal point of the reflector 20 .

The headlight comprises a movable diaphragm 50 , which in the embodiment of FIG. 1 is a first diaphragm provided between the reflector 20 and the lens 75 .

It is attached to a frame fixed to the reflector 20 , intermediate piece 30 of the headlamp.

The entire optical unit thus formed is not in one illustrated in a manner abge through a cover closed housing attached.

The aperture arranged in the vicinity of the focal plane of the lens 75 has an edge 51 which can form a first special light-dark profile for the emitted light beam in the focal plane of the lens. In the present case, the edge 51 forms a light-dark profile for right-hand traffic.

The aperture 50 is pivotally attached about a pivot axis X, which extends substantially horizontally across the upper optical axis of the headlamp.

Advantageously, the screen 50 is pivotally mounted on the frame part 30 of the headlight by means of a shaft 54 which is inserted through openings in openings 53 and is mounted in two bearings 31 , 32 of the frame part 30 of the headlight so that it can be freely rotated in these bearings .

As shown particularly in Fig. 1, the headlamp has means for pivoting the aperture 50 to bring it optionally in two positions, namely in a first vertical position, in which the edge 51 of the aperture 50 in the focal plane of the lens in Beam path of the light rays is arranged to form a light bundle with said first light-dark profile, and in a second horizontal position, in which the edge 51 of the diaphragm is arranged outside the beam path of the light rays len, in this case a light bundle without generating a cut-off line.

According to the example shown in FIG. 1, the first position is a position for low beam in right-hand traffic and the second position is a position for high beam.

It should be noted that the second horizontal position of the aperture 50 in the embodiments shown in FIGS. 5 to 8 is a third position of the aperture 50 .

Of course it can be provided that by the first Position a light beam with a different cut-off line than that of the low beam is formed.

The aperture 50 has the shape of a small sheet which is so thin that it practically does not shield the light beam emitted by the light source and reflected by the reflector if it is arranged horizontally in the high beam position.

The means for pivoting the shutter 50 about the axis X comprise in this case a control means having a Actuate the supply pin 61, which is connected at one end by being inserted into an opening provided on a side of the aperture 50 receiving device 55 with the diaphragm 50th The other end of the pin is connected to an electromagnet 60 which can actuate the pin 61 by pushing or pulling so that it causes the diaphragm 50 to pivot between a first position for low beam and the position for high beam.

The electromagnet 60 comprises in particular a housing in which a coil (in the rear area of the housing) and a core of a conventional type are arranged. The core is translationally movable in the housing interior and is connected to the end of the actuation pin 61 .

Alternatively, the core itself can be part of the pin 61 .

A return spring acts on the core. This return spring pushes the core into a retracted rest position. If the coil of the electromagnet is supplied with power, it pushes the core so that it pushes the actuating pin 61 forward and thereby presses the return spring against the inner wall of the housing. If the coil of the electromagnet is no longer supplied with current, the core is no longer acted upon by the coil and the return spring returns the core and the pin 61 to the above-mentioned rest position.

When the electromagnet is energized, the movement of the pin 61 causes the diaphragm 50 to pivot from its first vertical position for low beam to its horizontal position for high beam and to maintain this last position.

If the electromagnet is no longer supplied with power, the return spring returns the actuating pin to its starting position and the diaphragm 50 pivots in the other direction and returns to its vertical low beam position.

According to a variant, not shown, can be seen that the pivoting movement of the diaphragm 50 from the vertical low beam position into the horizontal high beam position is carried out by a manual actuating lever which is connected to the diaphragm 50 .

Advantageously, the sheet 50 forming the aperture continues below the axis of rotation X of the aperture and is firmly connected to a counterweight 52 .

It can be provided that this counterweight is attached to the sheet or is worked in one piece with the sheet. The counterweight 52 causes the center of gravity of the leaflet in the first position of the diaphragm 50 to be shifted below its axis of rotation; the aperture 50 thus tends to assume the first vertical position for low beam men, with the counterweight 52 is arranged below.

Fig. 9 can be seen that the frame part 30 has an L-shaped stop 33 which is attached to each of the bearings 31 , 32 , with a horizontal part 33 a in the plane of the pivot axis X of the panel 50 forward in the Headlight extends, and a vertical part 33 b extends above the pivot axis X of the aperture 50 , and wherein the horizontal part 33 a the horizontal position of the aperture 50 for high beam and the vertical part 33 b, the vertical position of the aperture 50 for low beam certainly.

The space requirement of the leaflet 50 below the axis of rotation is extremely small, and the space-saving counterweight does not require any additional space in comparison to the space provided in the housing of a conventional headlamp anyway.

The device works as follows:

If the electromagnet is no longer supplied with power or the manual operating lever, not shown, is released, the diaphragm 50 returns by the interaction of the counterweight 52 with the return spring of the electromagnet or the return of the manual operating lever in its vertical starting position for low beam.

According to the preferred embodiment shown in the drawings, the return spring does not have to exert a particularly large restoring force on the pin in order to bring the diaphragm 50 back with the desired speed from the position for high beam back to the first position for low beam, since it is caused by the Counterweight 52 gravity is supported here. It is therefore possible to choose an inexpensive return spring which takes up less space. The counterweight and the return spring also both help to keep the diaphragm in a stable position when the electromagnet is not supplied with power, in particular to avoid vibrating the diaphragm while the vehicle is moving.

At the aperture 50 two side arms 56 are also vorgese hen, which rest on the edges of a central opening of the frame part. These side arms are offset from the plane of the leaflet 50 within the plane of the frame member 30 that forms the focal plane by a distance equal to the thickness of the frame member so that the diaphragm 50 is in the first vertical position for low beam moves into the focal plane of the headlight lens.

According to the embodiment shown in FIG. 1, a second screen 70 is also provided, which is arranged in front of the first screen 50 at a distance from it. This second screen can be moved between two positions. In a first position, the edge 70 a of the second diaphragm 70 is arranged on the beam path of the light beams in order to form a light bundle with a second special light-dark profile together with the first diaphragm 50 .

To FIGS. 1 to 4 is to be noted that the distance between the two baffles 50, 70 for the purpose of a better Clearly ness is deliberately exaggerated.

In the present case, the second aperture has a rectangular shape with straight edges that are substantially half as long as in the first aperture 50 . The second diaphragm 70 ver runs in the left part of the diaphragm 50 and lies opposite it, so that thereby the light-dark limit originally formed by the first diaphragm can be raised in the first vertical position, in the light beam emitted by the headlight to create a cut-off line for left-hand traffic.

In a second position of the second diaphragm 70 , the edge 70 a of the second diaphragm 70 is arranged essentially outside the beam path of the light beams, in order either to form a light bundle with the first light-dark profile (the first diaphragm 50 is raised here ) or a light beam without a cut-off line (the first aperture 50 is lowered).

The second panel 70 is pivotally attached to a side part of the headlight by means of an angled lever 71 which has a part for manual actuation which projects outwards from the housing. The lever is rotatably mounted on the axis 72 , which runs horizontally and substantially parallel to the optical axis O of the headlamp. The second diaphragm 70 thus pivots in a vertical plane transverse to the optical axis. There are also two side stops 73 , 74 for the manual actuating lever, which determine the two positions of the second aperture 70 .

The second diaphragm 70 is arranged with the smallest possible distance d from the first diaphragm.

It should be noted that the second rectangular diaphragm 70 with straight edges, which is arranged in a plane which is parallel and very similar to the plane of the first diaphragm, has a low height, so that in its second lowered position it is that of Headlights in no way shields emitted light beams.

In FIG. 2, the first diaphragm 50 is shown in its first vertical position together with the second lowered position of the second diaphragm 70, so that the headlamp, a light beam with a light-dark boundary generated for right-hand traffic.

In Fig. 3, the two diaphragms 50 and 70 are raised (ie they are in their first position) so that they overlap and the light beam emitted by the headlight forms a light-dark boundary for left-hand traffic.

It should be noted that the second aperture 70 is not in the focal region of the lens when in the raised position. In this case, a somewhat graduated light-dark boundary is accepted, but in a variant that is not shown, it is set up so that the second aperture lies essentially in the focal plane of the lens.

In FIG. 4, the two diaphragms 50, 70 is lowered to a beam without cut-off, in this case, a high beam to be formed.

In Fig. 5, a second embodiment of the headlight according to the invention. According to this embodiment, in addition to the pivoting means, means are also provided for moving the diaphragm 50 transversely to the optical axis O of the headlight, around the diaphragm 50 optionally from the first position of the diaphragm 50 , in which the edge 51 lies in the beam path of the light rays, around a light bundle to form with light-dark boundary for right-hand traffic, to bring it into a second position in which the edge of the diaphragm 50 is displaced transversely to the optical axis O in the beam path of the light rays, so that a light beam with a second light-dark profile, in this case a cut-off line for left-hand traffic is formed.

According to the embodiment shown, the means for moving the screen 50 have a manual actuating pin 80 , 83 which is connected to the screen and is provided with a return spring 82 , by means of which the screen 50 can be returned from the second to the first position.

In an embodiment, not shown, it can also be pre-cut hen be that the means for moving the diaphragm an actuator Gung pin that has one end with the bezel  connected and with the other end to one with a return spring-loaded electromagnet is connected, wherein this electromagnet for actuating the pin with current ver care must be taken to move the bezel from the first position to the to move the second position.

As shown in more detail in FIG. 6, the diaphragm 50 is displaced over a distance d1 of 10 mm, so that the light-dark boundary of the diaphragm 50 , viewed from the front of the diaphragm 50 , is shifted laterally to the left and in Lichtbün del a light-dark boundary for left-hand traffic is generated.

In the second position of the diaphragm (dotted Darge in Fig. 6), the return spring 82 is pressed against a stop surface 82 a; when the return spring is released, it automatically brings the diaphragm 50 back into its first starting position (shown by solid lines in FIG. 6).

In Figs. 7 and 8, another embodiment of the OF INVENTION to the invention headlight is shown, according to which means are provided for pivoting the optical unit about the optical axis O of the headlamp, in order to bring the shutter 50 selectively in said first position and in a second position , in which the edge 51 of the diaphragm 50 is angularly offset in the vertical plane of the diaphragm in the beam path of the light rays in order to form a light bundle with a second light-dark profile. In this case, the cut-off line is raised so that a light beam with cut-off line for left-hand traffic is formed, whereas a light beam with cut-off line for right-hand traffic is formed when the diaphragm is in its first starting position , as shown in Fig. 7 from the front.

Of course, the diaphragm 50 can be pivoted from its first vertical position into its horizontal position (see FIG. 8) in order to, as already described above, a light beam with a cut-off line and a light beam without a cut-off line to build.

The means for pivoting the optical unit can pivot medium with an angle of approx. 15 ° within the vertical Plane of the aperture.

This can be done using a static or dynamic controller Alignment of the reflector take place.

As shown in more detail in FIG. 8, the means for pivoting the optical unit can also have an electric drive (not shown) which can rotate a frame 100 in which the optical unit is fastened. The rotating means allow the optical unit to be shifted in the vertical plane by a fixed angle α in order to raise the light-dark boundary in the emitted light bundle and to form a light bundle with light-dark boundary for left-hand traffic with an aperture such as this is formed that in the first position a light beam with a cut-off is formed for right-hand traffic. This angle α is 15 °, for example, if a change is to be made from a European low beam position for left-hand traffic to a European low beam position for right-hand traffic and vice versa.

The present invention is of course not in any Way in the manner described above and in the drawings illustrated embodiments limited. Each of the basic thank the invention corresponding variant can by To be carried out by a specialist.

Claims (12)

1. Motor vehicle headlights with a light source ( 11 ), an ellipsoidal reflector ( 20 ), the first focal point is located near the light source, a converging lens with a focal plane near a second focal point of the reflector, and one provided between the reflector and lens movable diaphragm ( 50 ) with an edge ( 51 ) which forms a first special profile of a light-dark boundary for the emitted light beam, characterized in that means ( 80 , 82 , 83 ) for horizontally moving the diaphragm across the optical Axis (O) of the headlights are provided to selectively bring the diaphragm in two positions, in a first position in which the edge ( 51 ) of the diaphragm ( 50 ) on the beam path of the light rays is arranged to a To form light bundles with the light-dark boundary according to the first profile, and in a second position in which the edge of the diaphragm is offset in relation to the first position in the beam path of the light is arranged to form a light beam with a light-dark boundary according to a second profile. 2. Headlight according to claim 1, characterized in that the means for moving the diaphragm comprise a manual actuating pin ( 80 , 83 ) which is connected to the diaphragm ( 50 ) and with a return spring ( 82 ) for retrieving the diaphragm from the second is provided in the first position. 3. headlight according to claim 1, characterized in that the means for moving the diaphragm include an actuating pin, one end of which with the Aperture and its other end with one with a return spring provided electromagnet is connected, the electroma gnet is designed to provide the power  Operate the pen in such a way that the pin removes the aperture from the first moved to the second position. 4. Headlight according to one of claims 1 to 3, characterized in that the translational movement of the Aperture takes place over a distance of about 10 mm. 5. Headlight according to one of claims 1 to 4, characterized in that means for selectively pivoting the Aperture in two positions are provided, in the first position lung and a third position, in which the edge of the aperture in essentially outside the beam path of the light rays is arranged to be a light beam with no cut-off form. 6. headlight according to claim 5, characterized in that the pivot axis of the diaphragm an im essential horizontal axis (X) transverse to the optical axis of the Headlight is. 7. Headlight according to claim 6, characterized in that the diaphragm has a sheet ( 50 ) which is fixedly connected to a shaft ( 54 ) which can rotate in two bearings ( 31 , 32 ) in one with the reflector firmly connected frame part ( 30 ) of the headlamp are formed. 8. Headlight according to one of claims 5 to 7, characterized in that the means for pivoting the aperture comprise an actuating pin ( 61 ), one end of which is connected to the aperture and the other end of which is provided with a return spring electromagnet ( 60 ) , wherein the electromagnet ( 60 ) is designed to actuate the pin ( 61 ) in the case of a power supply in such a way that the pin pivots the diaphragm ( 50 ) from the first to the third position. 9. Headlight according to one of claims 5 or 7, characterized in that the means for pivoting the diaphragm  a manual control lever connected to the cover include. 10. Headlight according to one of claims 5 to 9, characterized in that the diaphragm in the form of a fixed to a counterweight ( 52 ) leaflet ( 50 ) is ausgebil det that it has a center of gravity, which in the first position below it Pivot axis is so that the aperture tends to take the first position by itself. 11. Headlight according to one of claims 6 to 10, characterized in that it has at least one on one of the bearings ( 31 , 32 ) attached L-shaped stop ( 33 ) with one in the plane of the pivot axis of the diaphragm ( 50 ) to the front in the headlight extending horizontal part ( 33 a) and a vertical part ( 33 b) erstrec kenden above the pivot axis of the diaphragm ( 50 ), the horizontal part ( 33 a) defining the third position of the diaphragm and the vertical part ( 33 b) the first and second positions of the aperture. 12. Headlight according to one of the preceding claims, characterized in that the first and second positions of the Dazzle the positions for low beam when driving on the right, Left-hand traffic or for fog light, and the third position the aperture is a high beam position.