EP1069373B1 - Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, doppelten Lichtblende - Google Patents

Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, doppelten Lichtblende Download PDF

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Publication number
EP1069373B1
EP1069373B1 EP00401849A EP00401849A EP1069373B1 EP 1069373 B1 EP1069373 B1 EP 1069373B1 EP 00401849 A EP00401849 A EP 00401849A EP 00401849 A EP00401849 A EP 00401849A EP 1069373 B1 EP1069373 B1 EP 1069373B1
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EP
European Patent Office
Prior art keywords
occulting
cover
occulting part
light beam
cut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00401849A
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English (en)
French (fr)
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EP1069373A1 (de
Inventor
Massimo c/o Valeo Vision Di Tonno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
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Valeo Vision SAS
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1069373A1 publication Critical patent/EP1069373A1/de
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Publication of EP1069373B1 publication Critical patent/EP1069373B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/62—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution for adaptation between right-hand and left-hand traffic

Definitions

  • the present invention generally relates to elliptical projectors for motor vehicles.
  • a projector of this type conventionally comprises a light source, a reflector of the elliptical kind, a first focus of which is situated in the vicinity of the source, a convergent lens whose focal plane passes in the vicinity of a second focus of the receiver, and a projector closing window.
  • the lens may consist of the ice itself.
  • Such a headlamp When such a headlamp must generate a cut-off beam, such as a passing beam or an anti-fog beam, it comprises a cover interposed between the light source and the lens, which obscures the part of the radiation, which would otherwise propagate. above this cut.
  • a cut-off beam such as a passing beam or an anti-fog beam
  • a difficulty of this type of projector lies in the difficulty of changing the profile of the cut. Such a modification should be considered especially when a projector, designed for example for a right-hand traffic direction, must form a light beam, cut, adapted to a traffic on the left.
  • a solution, known per se, to modify the profile of the cut is to intervene on the projector cover to modify the cutoff profile.
  • an elliptical projector of the type comprising a first cover provided between the reflector and the lens, which has an edge defining a first profile of particular cutoff for the emitted light beam, and a second cover disposed on the first cover and selectively movable between two positions, a first position in which an edge of the second cover is positioned in the path of the light beams to form with the first cover a beam light with a second particular cutoff profile, and a second position in which said edge of the second cover is substantially positioned out of the path of the light rays to form a light beam with the first cutoff profile.
  • a solution for selectively forming a code function or a route function in a universal elliptical reflector projector consists of flip the projector's mobile cover to position it in or out of the emitted light beam.
  • an elliptical projector of the type comprising a flipping cover between a code position and a road position, about a generally horizontal axis and parallel to the optical axis.
  • the cover is pivotally mounted to a frame portion of the projector at one of its lateral sides, and the pivoting movement of the cover is effected such that it always remains in the vertical plane transverse to the optical axis where it is in the code position.
  • Such a projector has several disadvantages.
  • the emitted light beam has a reduced light intensity due to the fact that a portion of the cache located on the side of the axis of rotation of the latter, always remains in the path of the transmitted light rays.
  • the mounting of the pivoting cover on one of its lateral sides causes a bad balancing of the cache which is not supported on the other side.
  • rocking cover arrangement requires the use of bulky and powerful actuating means to ensure with the desired speed the return of the cache in the road position to the code position.
  • the present invention proposes a new universal projector of the elliptical type capable of selectively providing several functions, the function codes for traffic on the right or traffic on the left, the fog function and the road function, that is to say to selectively generate a a cut-off beam for right-hand or left-hand traffic or fog or an unbroken beam, in which the movable cover arrangement makes it possible in a road position to completely clear the cache of the emitted light beam, and in which the bulk of the Cache actuation system for its change of position is optimized.
  • a projector for a motor vehicle comprising a light source, a reflector of the elliptical kind, a first focus is located in the vicinity of the source, a convergent lens whose focal plane passes in the vicinity of a second focus of the reflector, a first cover provided between the reflector and the lens, which has an edge defining a first particular cutoff profile for the emitted light beam, and a second cover arranged in front of the first cover and selectively movable between two positions a first position in which an edge of the second cover is positioned in the path of the light rays to form with the first cover a light beam with a second particular cutoff profile, and a second position in which said edge of the second cover is substantially positioned out of the path of light rays to form a second light beam with the first profile cut.
  • the first cover is selectively movable between two positions, a first position in which said edge of the first cover is positioned in the path of the light rays to form a beam with said first cutoff profile, and a second position in wherein said edge of the cover is substantially positioned out of the path of the light rays to form a second unbroken light beam, and in that the second cover is positioned remote from the first cover, and in its second position allows said second light beam to form without interruption.
  • a motor vehicle headlamp which comprises a lamp 10 mounted in the bottom of a reflector 20 of the elliptical type so that the filament 11 of the lamp is in the vicinity of a first focus of the reflector 20 .
  • the projector further comprises a convergent lens 75 mounted on a frame portion 40 of the projector secured to the reflector.
  • the focal plane of the lens 75 passes near the second focus of the reflector 20.
  • the projector comprises a movable cover 50 which in the embodiment of FIG. 1 is a first cover provided between the reflector 20 and the lens 75.
  • the assembly constituting the optical block is mounted in a manner not shown in a housing closed by an ice.
  • the cover 50 positioned near the focal plane of the lens 75 has an edge 51 adapted to define in the focal plane of said lens, a first particular cutoff profile for the emitted light beam.
  • the edge 51 defines a cutoff profile for right-hand traffic.
  • the cover 50 is pivotally mounted about a pivot axis X generally horizontal and transverse to the optical axis high of the projector.
  • the pivotal mounting of the cover 50 on the frame part 30 of the headlamp is carried out by means of a shaft 54 introduced through said cover into orifices 53 and mounted in two bearings 31, 32 of the component. frame 30 of the projector so that it is free to rotate in these bearings.
  • the projector comprises means for tilting the cover 50 to bring it selectively into two positions, a first vertical position in which the edge 51 of the cover 50 is positioned in the focal plane of the lens on the path of the light rays to form a light beam with said first cutoff profile, and a second horizontal position in which the edge 51 of the cover is positioned out of the path of the light rays to form here an unbroken light beam.
  • the first position is a code position for traffic on the right and the second position is a road position.
  • the second horizontal position of the cover 50 is a third position of the cover 50 in the embodiments shown in FIGS. 5 to 8.
  • the first position corresponds to the formation of a different cut beam beam code.
  • the cover 50 is in the form of a blade which has a thickness such that when it is positioned horizontally in the road position, it does not substantially obscure the light beam emitted by the light source and reflected by the reflector .
  • the tilting means of the cover 50 around the axis X here comprise an operating means comprising an actuating rod 61, one end of which is connected to the cover being introduced into a housing 55 provided on a lateral side of the cover 50. Another end of the rod is connected to an electromagnet 60 adapted to actuate the rod 61 by pushing or pulling it so that it causes the pivoting of the cover 50 between the first coded position and the road position.
  • the electromagnet 60 comprises a housing in which are positioned a coil (in the bottom of the housing), and a core of classic.
  • the core is movable in translation inside the housing and is connected to the end of the actuating rod 61.
  • the core could be a part of the stem 61.
  • the core is biased by a return spring.
  • This return spring tends to recall the core in a retreated rest position.
  • the coil of the electromagnet When the coil of the electromagnet is energized, it moves the core so that it drives the actuating rod 61 forward while compressing the return spring against the inner wall of the housing.
  • the coil of the electromagnet When the coil of the electromagnet is no longer supplied with current, the core is no longer biased by the coil and the return spring brings the core and the rod 61 to the aforementioned rest position.
  • the movement exerted on the rod 61 causes it to cause the tilting of the cover 50 from its first code vertical position to its horizontal road position and the maintenance of the latter position.
  • the blade forming the cover 50 extends below the axis of rotation X of the cover and is integral with a counterweight 52.
  • this counterweight is mounted on the blade or is formed integrally with said blade.
  • the counterweight 52 causes the center of gravity of the blade to move below its axis of rotation in the first position of the cover 50 and thus naturally the cover 50 tends to move to the first vertical code position with its counterweight 52 positioned down.
  • the frame member 30 comprises an abutment 33 mounted on each of said bearings 31, 32, having an L shape with a horizontal portion 33a extending towards the front of the headlight in a plane containing the X axis of tilting of the cover 50 and a vertical portion 33b extending above the X axis of tilting of the cover 50, said portion horizontal 33a defining the horizontal road position of the cover 50 and said vertical part 33b defining the vertical positions code of the cover 50.
  • the size of the blade 50 below the axis of rotation is minimal and the reduced space requirement does not require any additional space compared to the place initially provided in the conventional projector housing.
  • the behavior of the device is as follows:
  • the cover 50 When the electromagnet is no longer powered or when the manual operating lever not shown is released, the cover 50 returns to its initial code vertical position under the combined action of the counterweight 52 and the return spring of the solenoid or return spring of the manual operating lever.
  • the return spring does not need to exert a very large restoring force on the rod to cause the return of the cover 50 from the road position to the first code position with the desired speed since it is assisted by the force of gravity exerted by the counterweight 52.
  • the counterweight and the return spring both contribute to maintain the cover in a stable position when the electromagnet is not supplied with power to avoid such that the cover vibrates when the motor vehicle rolls.
  • lateral lugs 56 which bear against edges of a central opening 35 of the frame part 30. These lateral lugs are offset with respect to the plane of precisely in the plane of the piece frame 30 which is the focal plane of the blade 50 by a distance equal to the thickness of the frame piece so that in the first vertical position code of the cover 50, it is placed from the lens of the projector.
  • a second cache 70 disposed in front of the first cache 50, at a distance thereof.
  • This second cache is selectively movable between two positions. In a first position the edge 70a of the second cover 70 is positioned in the path of the light rays to form with the first cover 50 a light beam with a second particular cutoff profile.
  • the second cover 70 has a rectangular shape with straight edges of a length substantially equal to half that of the first cover 50.
  • the second cover 70 extends on the left side of the cover 50 looking at it from the front, so that it allows in its first vertical position to raise the cut initially formed by the first cache to make a cut for traffic left in the light beam emitted by the projector.
  • the edge 70a of the second cover 70 is substantially positioned out of the path of the light rays to form either a light beam with the first cutoff profile (the first cover 50 is then raised), or a beam bright without interruption (the first cache 50 being lowered).
  • This second cover 70 is pivotally mounted on a side portion of the projector by means of a lever 71 bent with a portion adapted to project outside the housing to be manually actuated.
  • the lever is rotatably mounted on the axis 72 extending horizontally and substantially parallel to the optical axis O of the projector.
  • the second cover 70 then pivots in a vertical plane transverse to the optical axis. It is also provided two lateral stops 73,74 for the manual operating lever 71 defining the two positions of the second cover 70.
  • the second cache 70 is positioned at a distance d from the lowest possible cache.
  • the two covers 50 and 70 are raised (that is to say in their first position) so that they are superimposed and the light beam emitted by the projector has a cutoff for left-hand traffic.
  • the second cover 70 is not, in the raised position, in the focal plane of the lens.
  • the second cache is located substantially in the focal plane of the lens.
  • the two covers 50, 70 are lowered to form an unbroken lighting beam, here a road beam.
  • FIG. 5 there is shown a second embodiment of the projector according to the invention.
  • means for translating the cover 50 in the direction transverse to the optical axis O of the headlamp are provided for bringing said blank 50 selectively from the first position of the blank 50 with its edge 51 in the path of the light rays to form a cut-off beam for traffic on the right, and a second position in which said edge of the cover 50 is offset transversely with respect to the optical axis O in the path of the light rays, to form a light beam with a second cutoff profile, here a cutoff for traffic left.
  • the translation means of the cover 50 comprise, according to the embodiment shown, a manual actuating rod 80,83 linked to the cover and provided with a return spring 82 from the second to the first position of the cover 50. It is also possible to provide in a not shown embodiment that the translation means of the cover comprise an actuating rod whose one end is connected to the cover and whose other end is connected to an electromagnet provided with a return spring, said electromagnet being intended to be supplied with current to actuate said rod so that it causes translation of the cache from its first to its second position.
  • the translational movement of the cover 50 is made over a distance d1 of the order of 10 millimeters so as to move the cut laterally to the left by looking at the cover 50 from the front and realize in the light beam a cut for traffic on the left.
  • the return spring 82 In the second position of the cover (shown in broken lines in FIG. 6), the return spring 82 is compressed against an abutment surface 82a, and when the return spring is released, it automatically returns the cover 50 to its first initial position (shown in solid lines in FIG. 6).
  • FIGS. 7 and 8 show another embodiment of the headlamp according to the invention, according to which means are provided for pivoting the optical block around the optical axis O of the headlamp in order selectively to bring the blank 50 into said first position and in a second position in which the edge 51 of the cover 50 is positioned in the path of the light rays angularly offset in the vertical plane of the cover, to form a light beam with a second cutoff profile.
  • the cut is raised so as to form a left-hand traffic cut-off light beam, whereas when the cover is in its first initial position, it forms a cut-off light beam for traffic on the right, as shown on the front side.
  • Figure 7 the cover 50 can be tilted from its first vertical position to its horizontal position (see Figure 8) to form a cut beam and an unbroken beam, as already described above.
  • the pivoting means of the optical block may be tilting means at an angle of about 15 degrees in the vertical plane of the cache. This can be achieved by means of a static or dynamic corrector of the orientation of the reflector.
  • the pivoting means of the optical unit may also comprise an electric motor (not shown) capable of rotating a cage 100 in which the optical unit is mounted.
  • the rotation means allow for angularly shifting in the vertical plane the optical block of an angle ⁇ determined in order to raise the cut in the emitted light beam and form a light beam cut for traffic on the left with a shaped cover to achieve first position a light beam cut for traffic on the right.
  • This angle ⁇ is for example equal to 15 ° when it is a question of moving from a European code position for left traffic to a European code position for traffic on the right and vice versa.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (9)

  1. Kraftfahrzeugscheinwerfer mit einer Lichtquelle (11), einem Ellipsoid-Reflektor (20), dessen erster Brennpunkt in der Nähe der Lichtquelle liegt, einer Sammellinse (75), deren eine Brennebene in der Nähe eines zweiten Brennpunkts des Reflektors verläuft, einer ersten, zwischen dem Reflektor und der Linse vorgesehenen Blende (50), die einen Rand (51) aufweist, der ein erstes spezielles Begrenzungsprofil für das ausgesandte Lichtbündel definiert, und einer zweiten Blende (70), die vor der ersten Blende angeordnet und wahlweise zwischen zwei Stellungen verstellbar ist, einer ersten Stellung, in der ein Rand (70a) der zweiten Blende (70) im Strahlengang positioniert ist, um mit der ersten Blende (50) ein Lichtbündel mit einem zweiten speziellen Begrenzungsprofil zu formen, und einer zweiten Stellung, in welcher der Rand der zweiten Blende im Wesentlichen außerhalb des Strahlengangs positioniert ist, um ein Lichtbündel mit dem ersten Begrenzungsprofil zu bilden,
    dadurch gekennzeichnet, dass die erste Blende (50) wahlweise zwischen zwei Stellungen verstellbar ist, einer ersten Stellung, in welcher der Rand (51) der ersten Blende (50) im Strahlengang positioniert ist, um ein Lichtbündel mit dem ersten Begrenzungsprofil zu bilden, und einer zweiten Stellung, in welcher der Rand (51) der ersten Blende (50) im Wesentlichen außerhalb des Strahlengangs positioniert ist, um ein zweites Lichtbündel ohne Hell-Dunkel-Grenze zu bilden, und dass die zweite Blende (70) mit Abstand zur ersten Blende (50) positioniert ist und in ihrer zweiten Stellung das Bilden des zweiten Lichtbündels ohne Hell-Dunkel-Grenze zulässt.
  2. Scheinwerfer nach Anspruch 1,
    dadurch gekennzeichnet, dass die erste Blende (50) um eine Achse (X) herum zu schwenken vermag, die allgemein horizontal und quer zur optischen Achse (O) des Scheinwerfers verläuft.
  3. Scheinwerfer nach Anspruch 2,
    dadurch gekennzeichnet, dass die erste Blende (50) ein Plättchen aufweist, das mit einer Welle (54) fest verbunden ist, die in zwei Lagern (31, 32) zu drehen vermag, welche in einem mit dem Reflektor (20) fest verbundenen Rahmenteil (30) des Scheinwerfers gebildet sind.
  4. Scheinwerfer nach einem der Ansprüche 2 oder 3,
    dadurch gekennzeichnet, dass Mittel zum Betätigen der ersten Blende vorgesehen sind, um diese aus ihrer ersten Stellung in ihre zweite Stellung zu schwenken, mit einer Antriebsstange (61), deren eines Ende mit der ersten Blende verbunden ist und deren anderes Ende mit einem mit einer Rückstellfeder versehenen Elektromagneten (60) verbunden ist, wobei der Elektromagnet dazu bestimmt ist, zum Betätigen der Stange (61) mit Strom gespeist zu werden, damit diese das Schwenken der Blende (50) von der ersten in die zweite Stellung bewirkt.
  5. Scheinwerfer nach einem der Ansprüche 2 oder 3,
    dadurch gekennzeichnet, dass ein mit der ersten Blende verbundener Hebel zur manuellen Betätigung vorgesehen ist, um diese zwischen der ersten und der zweiten Stellung zu schwenken.
  6. Scheinwerfer nach einem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet, dass die zweite Blende (70) um eine Achse (74) herum zu schwenken vermag, die allgemein horizontal und zur optischen Achse parallel ist.
  7. Scheinwerfer nach Anspruch 6, ,
    dadurch gekennzeichnet, dass ein mit der zweiten Blende verbundener Seitenhebel (71) zur manuellen Betätigung vorgesehen ist, um diese zwischen ihrer ersten und zweiten Stellung zu schwenken, sowie zwei Seitenanschläge (72, 73) für den manuellen Betätigungshebel, welche die beiden Stellungen der zweiten Blende definieren.
  8. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die zweite Blende (70) eine im Wesentlichen rechteckige Form mit geraden Rändern aufweist und im Wesentlichen halb so lang wie die erste Blende ist und eine geringe Breite hat.
  9. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die erste Stellung der ersten Blende in Kombination mit der ersten und zweiten Stellung der zweiten Blende eine Abblendlichtstellung für Rechtsverkehr, Linksverkehr oder Nebelscheinwerfer ist und die zweite Stellung der ersten Blende in Kombination mit der zweiten Stellung der zweiten Blende eine Fernlichtstellung ist.
EP00401849A 1999-07-13 2000-06-29 Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, doppelten Lichtblende Expired - Lifetime EP1069373B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9909081 1999-07-13
FR9909081A FR2796447B1 (fr) 1999-07-13 1999-07-13 Projecteur pour vehicule automobile avec un double cache mobile

Publications (2)

Publication Number Publication Date
EP1069373A1 EP1069373A1 (de) 2001-01-17
EP1069373B1 true EP1069373B1 (de) 2007-03-21

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EP00401849A Expired - Lifetime EP1069373B1 (de) 1999-07-13 2000-06-29 Kraftfahrzeug-Scheinwerfer mit einer verstellbaren, doppelten Lichtblende

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EP (1) EP1069373B1 (de)
DE (1) DE60033993T2 (de)
ES (1) ES2283281T3 (de)
FR (1) FR2796447B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302002B6 (cs) * 2005-08-10 2010-09-01 Visteon Global Technologies, Inc. Svetlometový systém pro motorová vozidla
EP1764551B1 (de) * 2005-09-20 2012-11-07 Valeo Vision Elliptischer Scheinwerfer mit einem Satz schwenkbarer Blenden
DE102006008188A1 (de) * 2006-02-22 2007-08-30 Audi Ag Beleuchtungsvorrichtung für ein Fahrzeug
DE102007050207A1 (de) * 2007-10-20 2009-04-23 Hella Kgaa Hueck & Co. Projektionsscheinwerfer für Fahrzeuge
FR2923775B1 (fr) * 2007-11-16 2010-01-08 Valeo Vision Projecteur elliptique pour vehicule automobile equipe d'un cache vacancier
FR2927689B1 (fr) 2008-02-14 2015-01-23 Valeo Vision Module elliptique pour vehicule automobile
DE102008011180A1 (de) 2008-02-26 2009-08-27 GM Global Technology Operations, Inc., Detroit Scheinwerfer
JP5414246B2 (ja) * 2008-11-19 2014-02-12 株式会社小糸製作所 車両用前照灯

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4968977A (en) 1989-02-03 1990-11-06 Digital Equipment Corporation Modular crossbar interconnection metwork for data transactions between system units in a multi-processor system
DE3903631C1 (de) 1989-02-08 1990-07-05 Hella Kg Hueck & Co, 4780 Lippstadt, De
DE19501173A1 (de) * 1995-01-17 1996-07-18 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge
FR2769071B1 (fr) * 1997-09-26 1999-12-03 Valeo Vision Projecteur de type elliptique a faisceau variable, notamment pour vehicule automobile

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Publication number Publication date
DE60033993T2 (de) 2007-12-06
FR2796447A1 (fr) 2001-01-19
ES2283281T3 (es) 2007-11-01
FR2796447B1 (fr) 2001-08-17
DE60033993D1 (de) 2007-05-03
EP1069373A1 (de) 2001-01-17

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