EP1069373B1 - Motor vehicle headlight comprising a displaceable double light shield - Google Patents

Motor vehicle headlight comprising a displaceable double light shield 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
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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
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EP00401849A
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German (de)
French (fr)
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EP1069373A1 (en
Inventor
Massimo c/o Valeo Vision Di Tonno
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Valeo Vision SAS
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Valeo Vision SAS
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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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  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

La présente invention concerne de façon générale des projecteurs de type elliptique pour véhicules automobiles.The present invention generally relates to elliptical projectors for motor vehicles.

Un projecteur de ce type comprend de manière classique une source lumineuse, un réflecteur du genre elliptique, dont un premier foyer est situé au voisinage de la source, une lentille convergente dont un plan focal passe au voisinage d'un second foyer du récepteur, et une glace de fermeture du projecteur.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.

Dans certains cas, la lentille peut être constituée par la glace elle-même.In some cases, the lens may consist of the ice itself.

Lorsqu'un tel projecteur doit engendrer un faisceau à coupure, tel qu'un faisceau de croisement ou un faisceau anti-brouillard, il comporte un cache interposé entre la source lumineuse et la lentille, qui occulte la partie du rayonnement, qui autrement se propagerait au-dessus de cette coupure.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.

Une difficulté de ce type de projecteur réside alors dans la difficulté qu'il y a à modifier le profil de la coupure. Une telle modification doit être envisagée notamment lorsqu'un projecteur, conçu par exemple pour un sens de circulation à droite, doit former un faisceau lumineux, coupé, adapté à une circulation à gauche.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.

Il peut être également souhaitable de réaliser un projecteur universel capable d'engendrer sélectivement un faisceau de croisement, un faisceau anti-brouillard ou un faisceau sans coupure.It may also be desirable to provide a universal projector capable of selectively generating a passing beam, a fog or an unbroken beam.

Une solution, connue en soi, pour modifier le profil de la coupure, consiste à intervenir sur le cache du projecteur pour en modifier le profil de coupure.A solution, known per se, to modify the profile of the cut, is to intervene on the projector cover to modify the cutoff profile.

Plus particulièrement, on connaît du document EP 0 381 851 (divulgant toutes les caractéristiques du préambule de la revendication 1), un projecteur elliptique du type comportant un premier cache prévu entre le réflecteur et la lentille, qui présente un bord définissant un premier profil de coupure particulier pour le faisceau lumineux émis, et un second cache disposé sur le premier cache et mobile sélectivement entre deux positions, une première position dans laquelle un bord du second cache est positionné sur le trajet des rayons lumineux pour former avec le premier cache un faisceau lumineux avec un deuxième profil de coupure particulier, et une deuxième position dans laquelle ledit bord du second cache est sensiblement positionné hors du trajet des rayons lumineux pour former un faisceau lumineux avec le premier profil de coupure.More particularly, it is known from EP 0 381 851 (disclosing all the features of the preamble of claim 1), 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.

En outre, une solution pour former sélectivement dans un projecteur universel à réflecteur elliptique une fonction code ou une fonction route, consiste à faire basculer le cache mobile du projecteur pour le positionner dans ou hors du faisceau lumineux émis.Furthermore, 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.

A ce sujet, on connaît déjà un projecteur elliptique du type comportant un cache basculant entre une position code et une position route, autour d'un axe généralement horizontal et parallèle à l'axe optique.In this regard, we already know 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.

Le cache est monté à pivotement sur une partie d'ossature du projecteur, au niveau d'un de ses côtés latéraux, et le mouvement de pivotement du cache s'effectue de telle sorte qu'il reste toujours dans le plan vertical transversal à l'axe optique où il se trouve dans la position code.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.

Un tel projecteur présente plusieurs inconvénients.Such a projector has several disadvantages.

Tout d'abord, avec un tel agencement de cache basculant autour d'un axe parallèle à l'axe optique, compte tenu du faible espace disponible dans le boîtier du projecteur, en dessous du cache, il est impossible de dégager complètement le cache du faisceau lumineux émis, du côté de l'axe de rotation dudit cache.Firstly, with such a flip-flop arrangement around an axis parallel to the optical axis, given the small space available in the projector housing, below the cache, it is impossible to completely clear the cache of the projector. light beam emitted, on the side of the axis of rotation of said cache.

Ainsi, lorsque ce projecteur fonctionne en route, le faisceau lumineux émis présente une intensité lumineuse réduite due au fait qu'une partie du cache située du côté de l'axe de rotation de ce dernier, reste toujours sur le trajet des rayons lumineux émis.Thus, when this projector is operating on the road, 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.

En outre, le montage du cache à pivotement sur un de ses côtés latéraux, engendre un mauvais équilibrage du cache qui n'est pas soutenu de l'autre côté.In addition, 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.

Enfin, un tel agencement de cache basculant nécessite l'utilisation d'un moyen d'actionnement encombrant et puissant pour assurer avec la rapidité voulue le retour du cache dans la position route vers la position code.Finally, such a 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.

La présente invention propose alors un nouveau projecteur universel de type elliptique capable d'assurer sélectivement plusieurs fonctions, la fonction code pour trafic à droite ou trafic à gauche, la fonction antibrouillard et la fonction route, c'est à dire d'engendrer sélectivement un faisceau à coupure pour trafic à droite ou trafic à gauche ou antibrouillard ou encore un faisceau sans coupure, dans lequel l'agencement de cache mobile permet dans une position route de dégager complètement le cache du faisceau lumineux émis, et dans lequel l'encombrement du système d'actionnement du cache pour son changement de position est optimisé.The present invention then 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.

Plus particulièrement, selon l'invention, il est prévu un projecteur pour véhicule automobile, comprenant une source lumineuse, un réflecteur du genre elliptique dont un premier foyer est situé au voisinage de la source, une lentille convergente dont un plan focal passe au voisinage d'un second foyer du réflecteur, un premier cache prévu entre le réflecteur et la lentille, qui présente un bord définissant un premier profil de coupure particulier pour le faisceau lumineux émis, et un second cache disposé devant le premier cache et mobile sélectivement entre deux positions, une première position dans laquelle un bord du second cache est positionné sur le trajet des rayons lumineux pour former avec le premier cache un faisceau lumineux avec un deuxième profil de coupure particulier, et une deuxième position dans laquelle ledit bord du second cache est sensiblement positionné hors du trajet des rayons lumineux pour former un second faisceau lumineux avec le premier profil de coupure.More particularly, according to the invention, there is provided 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.

Il est caractérisé en ce que le premier cache est mobile sélectivement entre deux positions, une première position dans laquelle ledit bord du premier cache est positionné sur le trajet des rayons lumineux pour former un faisceau avec ledit premier profil de coupure, et une seconde position dans laquelle ledit bord du cache est sensiblement positionné hors du trajet des rayons lumineux pour former un second faisceau lumineux sans coupure, et en ce que le second cache est positionné à distance du premier cache, et permet dans sa deuxième position de former ledit second faisceau lumineux sans coupure.It is characterized in that 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.

Selon d'autres caractéristiques avantageuses et non limitatives du projecteur selon l'invention :

  • le premier cache est apte à pivoter autour d'un axe généralement horizontal et transversal à l'axe optique du projecteur,
  • le premier cache comporte une lame solidaire d'un arbre susceptible de tourner dans deux paliers formés dans une pièce d'ossature du projecteur solidaire du réflecteur,
  • il est prévu des moyens de manoeuvre du premier cache pour le faire basculer de sa première position vers sa seconde position, comprenant une tige d'actionnement dont une extrémité est liée au premier cache et dont une autre extrémité est raccordée à un électroaimant pourvu d'un ressort de rappel, ledit électroaimant étant destiné à être alimenté en courant pour actionner ladite tige de façon à ce qu'elle entraîne le pivotement du cache de la première vers la seconde position,
  • le premier cache est conformé sous la forme d'une lame solidaire d'un contrepoids de manière qu'il présente un centre de gravité situé, dans la première position, en dessous de son axe de basculement de telle sorte que ledit cache à tendance intrinsèquement à se placer dans la première position,
  • il comporte au moins une butée montée sur un desdits paliers, présentant une forme en L avec une partie horizontale s'étendant vers l'avant du projecteur dans un plan contenant l'axe de basculement du premier cache et une partie verticale s'étendant au-dessus de l'axe de basculement du premier cache, ladite partie horizontale définissant la seconde position du premier cache et ladite partie verticale définissant la première position du premier cache,
  • il est prévu un levier latéral d'actionnement manuel lié au second cache pour le faire basculer entre ses première et deuxième positions, et deux butées latérales pour ledit levier d'actionnement manuel définissant les deux positions dudit second cache,
  • le second cache présente une forme sensiblement rectangulaire à bords droits, de longueur sensiblement égale à la moitié de celle du premier cache et de faible largeur,
  • la première position du premier cache combinée avec les première et deuxième position du second cache est une position code pour trafic à droite, trafic à gauche ou antibrouillard, et la seconde position du premier cache combinée avec la deuxième position du second cache est une position route.
La description qui va suivre en regard des dessins annexés donnés à titre d'exemples non limitatifs, fera bien comprendre à quoi consiste l'invention et comment elle peut être réalisée.
Sur les dessins annexés :
  • la figure 1 est une vue schématique en perspective éclatée d'un mode de réalisation du projecteur selon l'invention,
  • les figures 2 à 4 sont des vues schématiques partielles en perspective du projecteur de la figure 1 dans trois configurations différentes d'éclairage,
  • la figure 5 est une vue schématique partielle en coupe horizontale axiale d'un deuxième mode de réalisation de projecteur selon l'invention,
  • la figure 6 est une vue de face d'une partie du projecteur de la figure 5 dans deux configurations d'éclairage différentes,
  • la figure 7 est une vue schématique de face d'un troisième mode de réalisation du projecteur selon l'invention,
  • la figure 8 est une vue schématique en coupe verticale axiale du projecteur de la figure 7, et
  • la figure 9 est une vue schématique en perspective de trois quarts d'un mode de réalisation préféré de la pièce d'ossature intermédiaire du projecteur selon l'invention.
According to other advantageous and non-limiting features of the projector according to the invention:
  • the first cover is able to pivot about an axis generally horizontal and transverse to the optical axis of the projector,
  • the first cover comprises a blade secured to a shaft rotatable in two bearings formed in a frame part of the projector secured to the reflector,
  • there are provided means for operating the first cover to tilt it from its first position to its second position, comprising an actuating rod whose one end is connected to the first 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 as to cause the cache to pivot from the first to the second position,
  • the first cover is shaped as a blade integral with a counterweight so that it has a center of gravity located, in the first position, below its axis of tilt so that said cache tends intrinsically to place yourself in the first position,
  • it comprises at least one abutment mounted on one of said bearings, having an L-shape with a horizontal part extending towards the front of the projector in a plane containing the tilting axis of the first cover and a vertical part extending to above the tilting axis of the first cover, said horizontal part defining the second position of the first cover and said vertical part defining the first position of the first cover,
  • there is provided a manual operating lever connected to the second cover to switch it between its first and second positions, and two lateral stops for said manual operating lever defining the two positions of said second cover,
  • the second cover has a substantially rectangular shape with straight edges, of a length substantially equal to half that of the first cover and of small width,
  • the first position of the first cache combined with the first and second positions of the second cache is a code position for right traffic, left traffic or fog, and the second position of the first cache combined with the second position of the second cache is a road position .
The following description with reference to the accompanying drawings given by way of non-limiting examples, will make it clear what the invention consists of and how it can be achieved.
In the accompanying drawings:
  • FIG. 1 is a schematic exploded perspective view of an embodiment of the headlight according to the invention,
  • Figures 2 to 4 are partial schematic perspective views of the projector of Figure 1 in three different lighting configurations,
  • FIG. 5 is a partial schematic view in axial axial section of a second embodiment of the projector according to the invention,
  • FIG. 6 is a front view of a part of the projector of FIG. 5 in two different lighting configurations,
  • FIG. 7 is a diagrammatic front view of a third embodiment of the headlight according to the invention,
  • FIG. 8 is a diagrammatic view in axial vertical section of the projector of FIG. 7, and
  • Figure 9 is a schematic perspective view of three quarters of a preferred embodiment of the intermediate frame part of the projector according to the invention.

Préliminairement, on notera que d'une figure à l'autre les éléments identiques ou similaires sont référencés dans la mesure du possible par les mêmes signes de référence et ne seront pas redécrits à chaque fois.Preliminarily, it will be noted that from one figure to another the identical or similar elements are referenced as far as possible by the same reference signs and will not be rewritten each time.

Sur les figures on a représenté un projecteur pour véhicule automobile qui comporte une lampe 10 montée dans le fond d'un réflecteur 20 du type elliptique de telle sorte que le filament 11 de la lampe se situe au voisinage d'un premier foyer du réflecteur 20.In the figures there is shown 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 .

Le projecteur comporte en outre une lentille convergente 75 montée sur une partie d'ossature 40 du projecteur solidaire du réflecteur.The projector further comprises a convergent lens 75 mounted on a frame portion 40 of the projector secured to the reflector.

Le plan focal de la lentille 75 passe au voisinage du second foyer du réflecteur 20.The focal plane of the lens 75 passes near the second focus of the reflector 20.

Le projecteur comporte un cache mobile 50 qui dans le mode de réalisation de la figure 1 est un premier cache, prévu entre le réflecteur 20 et la lentille 75.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.

Il est monté dans une pièce d'ossature intermédiaire 30 du projecteur solidaire du réflecteur 20.It is mounted in an intermediate frame part 30 of the projector secured to the reflector 20.

L'ensemble constituant le bloc optique est monté de façon non représentée dans un boîtier fermé par une glace.The assembly constituting the optical block is mounted in a manner not shown in a housing closed by an ice.

Le cache 50 positionné à proximité du plan focal de la lentille 75 présente un bord 51 apte à définir dans le plan focal de ladite lentille, un premier profil de coupure particulier pour le faisceau lumineux émis. Ici, le bord 51 défini un profil de coupure pour trafic à droite.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. Here, the edge 51 defines a cutoff profile for right-hand traffic.

Le cache 50 est monté à pivotement autour d'un axe de pivotement X généralement horizontal et transversal à l'axe optique haut du projecteur.The cover 50 is pivotally mounted about a pivot axis X generally horizontal and transverse to the optical axis high of the projector.

Avantageusement, le montage à pivotement du cache 50 sur la pièce d'ossature 30 du projecteur est réalisé par l'intermédiaire d'un arbre 54 introduit au travers dudit cache dans des orifices 53 et monté dans deux paliers 31,32 de la pièce d'ossature 30 du projecteur de telle sorte qu'il est libre de tourner dans ces paliers.Advantageously, 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.

Comme le montre plus particulièrement la figure 1, le projecteur comprend des moyens de basculement du cache 50 pour l'amener sélectivement dans deux positions, une première position verticale dans laquelle le bord 51 du cache 50 est positionné dans le plan focal de la lentille sur le trajet des rayons lumineux pour former un faisceau lumineux avec ledit premier profil de coupure, et une seconde position horizontale dans laquelle le bord 51 du cache est positionné hors du trajet des rayons lumineux pour former ici un faisceau lumineux sans coupure.As shown more particularly in FIG. 1, 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.

Selon l'exemple représenté sur la figure 1, la première position est une position code pour trafic à droite et la seconde position est une position route.According to the example shown in FIG. 1, the first position is a code position for traffic on the right and the second position is a road position.

Il est à noter que la seconde position horizontale du cache 50, est une troisième position du cache 50 dans les modes de réalisation représentés sur les figures 5 à 8.It should be noted that 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.

Bien entendu, on pourrait prévoir que la première position correspond à la formation d'un faisceau à coupure différent du faisceau code.Of course, it could be expected that the first position corresponds to the formation of a different cut beam beam code.

Le cache 50 se présente sous la forme d'une lame qui présente une épaisseur telle que lorsqu'il est positionné de manière horizontale dans la position route, il n'occulte pratiquement pas le faisceau lumineux émis par la source lumineuse et réfléchi par le réflecteur.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 .

Les moyens de basculement du cache 50 autour de l'axe X comprennent ici un moyen de manoeuvre comportant une tige d'actionnement 61 dont une extrémité est liée au cache en étant introduite dans un logement 55 prévu sur un côté latéral du cache 50. L'autre extrémité de la tige est raccordée à un électroaimant 60 apte à actionner la tige 61 en la poussant ou en la tirant de telle sorte qu'elle entraîne le pivotement du cache 50 entre la première position code et la position route.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.

Plus particulièrement, l'électroaimant 60 comporte un boîtier dans lequel sont positionnés une bobine (dans le fond du boîtier), et un noyau de façon classique. Le noyau est mobile en translation à l'intérieur du boîtier et est relié à l'extrémité de la tige d'actionnement 61.More particularly, 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.

En variante, le noyau pourrait être une partie même de la tige 61.Alternatively, the core could be a part of the stem 61.

Le noyau est sollicité par un ressort de rappel. Ce ressort de rappel a tendance à rappeler le noyau dans une position de repos reculée. Lorsque la bobine de l'électroaimant est alimentée en courant, elle déplace le noyau de sorte qu'elle entraîne vers l'avant la tige d'actionnement 61, tout en comprimant le ressort de rappel contre la paroi interne du boîtier. Lorsque la bobine de l'électroaimant n'est plus alimentée en courant, le noyau n'est plus sollicité par la bobine et le ressort de rappel ramène le noyau et la tige 61 vers la position de repos précitée.The core is biased by a return spring. This return spring tends to recall the core in a retreated rest position. 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. 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.

Lorsque l'électroaimant est alimenté en courant, le mouvement exercé sur la tige 61 amène celle-ci à provoquer le basculement du cache 50 de sa première position verticale code vers sa position horizontale route et le maintien de cette dernière position.When the electromagnet is supplied with current, 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.

Quand l'électroaimant n'est plus alimenté en courant, le ressort de rappel ramène la tige d'actionnement dans sa position initiale, le cache 50 bascule dans le sens inverse pour revenir vers sa position code verticale.When the electromagnet is no longer supplied with current, the return spring returns the actuating rod to its initial position, the cover 50 switches in the opposite direction to return to its vertical code position.

Selon une variante de réalisation non représentée, on peut prévoir que le mouvement de basculement du cache 50 de la position verticale code vers la position horizontale route soit réalisé par l'intermédiaire d'un levier d'actionnement manuel relié au cache 50.According to an alternative embodiment not shown, it is possible for the tilting movement of the cover 50 from the vertical position to code to the horizontal road position to be achieved by means of a manual operating lever connected to the cover 50.

Avantageusement, la lame constituant le cache 50 se prolonge en dessous de l'axe de rotation X du cache et est solidaire d'un contrepoids 52.Advantageously, the blade forming the cover 50 extends below the axis of rotation X of the cover and is integral with a counterweight 52.

Il peut être prévu que ce contrepoids soit monté sur la lame ou soit formé d'une seule pièce avec ladite lame. Le contrepoids 52 fait que dans la première position du cache 50, le centre de gravité de la lame est déplacé en dessous de son axe de rotation et ainsi naturellement le cache 50 a tendance à se placer dans la première position code verticale avec son contrepoids 52 positionné vers le bas.It may be provided that 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.

On remarquera sur la figure 9 que la pièce d'ossature 30 comporte une butée 33 montée sur chacun desdits paliers 31,32, présentant une forme en L avec une partie horizontale 33a s'étendant vers l'avant du projecteur dans un plan contenant l'axe X de basculement du cache 50 et une partie verticale 33b s'étendant au-dessus de l'axe X de basculement du cache 50, ladite partie horizontale 33a définissant la position horizontale route du cache 50 et ladite partie verticale 33b définissant les positions verticales code du cache 50.It will be noted in FIG. 9 that 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.

L'encombrement de la lame 50 en dessous de l'axe de rotation est minimal et le contrepoids d'encombrement réduit ne nécessite aucune place supplémentaire par rapport à la place initialement prévue dans le boîtier du projecteur classique.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.

Le comportement du dispositif est le suivant :The behavior of the device is as follows:

Lorsque l'électroaimant n'est plus alimenté en courant ou lorsque le levier d'actionnement manuel non représenté est libéré, le cache 50 revient dans sa position verticale code initiale sous l'action combinée du contrepoids 52 et du ressort de rappel de l'électroaimant ou du ressort de rappel du levier d'actionnement manuel.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.

Ainsi, selon le mode de réalisation préférentiel représenté sur les figures, le ressort de rappel n'a pas besoin d'exercer une force de rappel très importante sur la tige pour provoquer le retour du cache 50 de la position route vers la première position code avec la rapidité voulue puisqu'il est assisté par la force de gravité exercée par le contrepoids 52. On peut donc choisir un ressort de rappel moins encombrant et moins coûteux. De plus, le contrepoids et le ressort de rappel contribuent tous deux à maintenir le cache dans une position stable lorsque l'électroaimant n'est pas alimenté en courant pour éviter notamment que le cache vibre lorsque le véhicule automobile roule.Thus, according to the preferred embodiment shown in the figures, 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. We can choose a return spring less cumbersome and less expensive. In addition, 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.

Il est prévu également sur le cache 50 deux pattes latérales 56 qui viennent prendre appui contre des bords d'une ouverture centrale 35 de la pièce d'ossature 30. Ces pattes latérales sont décalées par rapport au plan de précisément dans le plan de la pièce d'ossature 30 qui est le plan focal la lame 50 d'une distance égale à l'épaisseur de la pièce d'ossature de telle sorte que dans la première position verticale code du cache 50, celui-ci vient se placer de la lentille du projecteur.It is also provided on the cover 50 two 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.

Selon le mode de réalisation représenté de la figure 1, il est prévu en outre un second cache 70 disposé devant le premier cache 50, à distance de celui-ci. Ce second cache est mobile sélectivement entre deux positions. Dans une première position le bord 70a du second cache 70 est positionné sur le trajet des rayons lumineux pour former avec le premier cache 50 un faisceau lumineux avec un deuxième profil de coupure particulier.According to the embodiment shown in Figure 1, there is further provided 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.

On notera sur les figures 1 à 4 que la distance entre les deux caches 50, 70 est volontairement exagérée pour plus de clarté.It will be noted in Figures 1 to 4 that the distance between the two covers 50, 70 is deliberately exaggerated for clarity.

Ici, le second cache 70 présente une forme rectangulaire à bords droits de longueur sensiblement égale à la moitié de celle du premier cache 50. Le second cache 70 s'étend sur la partie gauche du cache 50 en le regardant de face, de sorte qu'il permet dans sa première position verticale de relever la coupure initialement formée par le premier cache pour réaliser une coupure pour trafic à gauche dans le faisceau lumineux émis par le projecteur.Here, 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.

Dans une deuxième position du second cache 70, le bord 70a du second cache 70 est sensiblement positionné hors du trajet des rayons lumineux pour former soit un faisceau lumineux avec le premier profil de coupure (le premier cache 50 étant alors relevé), soit un faisceau lumineux sans coupure (le premier cache 50 étant abaissé).In a second position of the second cover 70, 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).

Ce second cache 70 est monté à pivotement sur une partie latérale du projecteur par l'intermédiaire d'un levier 71 coudé avec une partie apte à faire saillie à l'extérieur du boîtier pour être actionnée manuellement. Le levier est monté en rotation sur l'axe 72 s'étendant horizontalement et sensiblement parallèlement à l'axe optique O du projecteur. Le second cache 70 pivote alors dans un plan vertical transversal à l'axe optique. Il est prévu également deux butées latérales 73,74 pour le levier d'actionnement manuel 71 définissants les deux positions du second cache 70.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.

Le deuxième cache 70 est positionné à une distance d du premier cache la plus faible possible.The second cache 70 is positioned at a distance d from the lowest possible cache.

On notera que le second cache 70 de forme rectangulaire à bords droits, placé dans un plan parallèle et très voisin au plan contenant le premier cache, présente une faible hauteur de sorte que dans sa deuxième position abaissée il n'occulte pas une partie du faisceau lumineux émis par le projecteur.Note that the second cache 70 of rectangular shape with straight edges, placed in a parallel plane and very close to the plane containing the first cover, has a low height so that in its second lowered position it does not obscure part of the beam light emitted by the projector.

Sur la figure 2, on a représenté le premier cache 50 dans sa première position verticale combinée avec la deuxième position abaissée du second cache 70, de sorte que le projecteur forme un faisceau lumineux avec une coupure pour trafic à droite.In Figure 2, there is shown the first cover 50 in its first vertical position combined with the second lowered position of the second cover 70, so that the projector forms a light beam with a cut for traffic on the right.

Sur la figure 3, les deux caches 50 et 70 sont relevés (c'est à dire dans leur première position) de sorte qu'ils se superposent et le faisceau lumineux émis par le projecteur présente une coupure pour trafic à gauche. Il est à noter que le second cache 70 ne se situe pas, en position relevée, dans le plan focal de la lentille. On accepte alors ici une coupure légèrement dégradée, mais dans une variante non représentée, on s'arrange pour que le second cache soit situé sensiblement dans le plan focal de la lentille.In FIG. 3, 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. It should be noted that the second cover 70 is not, in the raised position, in the focal plane of the lens. Here we accept a slightly degraded cut, but in a variant not shown, it is arranged that the second cache is located substantially in the focal plane of the lens.

Sur la figure 4, les deux caches 50,70 sont abaissés pour former un faisceau d'éclairage sans coupure, ici un faisceau route.In FIG. 4, the two covers 50, 70 are lowered to form an unbroken lighting beam, here a road beam.

Sur la figure 5, on a représenté un deuxième mode de réalisation du projecteur selon l'invention. Selon le mode de réalisation, il est prévu outre les moyens de basculement, des moyens de translation du cache 50 selon la direction transversale à l'axe optique O du projecteur, pour amener ledit cache 50 sélectivement de la première position du cache 50 avec son bord 51 dans le trajet des rayons lumineux pour former un faisceau à coupure pour trafic à droite, et à une deuxième position dans laquelle ledit bord du cache 50 est décalé transversalement par rapport à l'axe optique O dans le trajet des rayons lumineux, de manière à former un faisceau lumineux avec un deuxième profil de coupure, ici une coupure pour trafic à gauche.In Figure 5, there is shown a second embodiment of the projector according to the invention. According to the embodiment, in addition to the tilting means, 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.

Les moyens de translation du cache 50 comprennent selon le mode de réalisation représenté, une tige d'actionnement manuel 80,83 liée au cache et pourvue d'un ressort de rappel 82 de la deuxième vers la première position du cache 50. On peut également prévoir dans un mode de réalisation non représenté que les moyens de translation du cache comprennent une tige d'actionnement dont une extrémité est liée au cache et dont une autre extrémité est raccordée à un électroaimant pourvu d'un ressort de rappel, ledit électroaimant étant destiné à être alimenté en courant pour actionner ladite tige de façon à ce qu'elle entraîne la translation du cache de sa première vers sa deuxième position.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.

Comme le montre plus particulièrement la figure 6, le déplacement à translation du cache 50 est réalisé sur une distance d1 de l'ordre de 10 millimètres de façon à déplacer la coupure latéralement vers la gauche en regardant le cache 50 de face et réaliser dans le faisceau lumineux une coupure pour trafic à gauche.As shown more particularly in FIG. 6, 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.

Dans la deuxième position du cache (représentée en traits pointillés sur la figure 6), le ressort de rappel 82 est comprimé contre une surface de butée 82a, et lorsque l'on libère le ressort de rappel, celui-ci ramène automatiquement le cache 50 dans sa première position initiale (représentée en trait plein sur la figure 6).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).

Sur les figures 7 et 8, on a représenté un autre mode de réalisation du projecteur selon l'invention, selon lequel il est prévu des moyens de pivotement du bloc optique autour de l'axe optique O du projecteur pour amener sélectivement le cache 50 dans ladite première position et dans une deuxième position dans laquelle le bord 51 du cache 50 est positionné dans le trajet des rayons lumineux de façon décalée angulairement dans le plan vertical du cache, pour former un faisceau lumineux avec un deuxième profil de coupure. Ici, on relève la coupure de manière à former un faisceau lumineux à coupure pour trafic à gauche, alors que lorsque le cache est dans sa première position initiale, il forme un faisceau lumineux à coupure pour trafic à droite, comme représenté de face sur la figure 7.Bien entendu, le cache 50 peut être basculé de sa première position verticale vers sa position horizontale (voir la figure 8) pour former un faisceau à coupure et un faisceau sans coupure, comme cela a déjà été décrit précédemment.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. Here, 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. Of course, 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.

Les moyens de pivotement du bloc optique peuvent être des moyens de basculement d'un angle de 15 degrés environ dans le plan vertical du cache. Cela peut être réalisé par l'intermédiaire d'un correcteur statique ou dynamique de l'orientation du réflecteur.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.

Comme le montre plus particulièrement la figure 8 les moyens de pivotement du bloc optique peuvent également comprendre un moteur électrique (non représenté) apte à entraîner en rotation une cage 100 dans laquelle est monté le bloc optique. Les moyens de rotation permettent pour décaler angulairement dans le plan vertical le bloc optique d'un angle α déterminé afin de relever la coupure dans le faisceau lumineux émis et former un faisceau lumineux à coupure pour trafic à gauche avec un cache conformé pour réaliser en première position un faisceau lumineux à coupure pour trafic à droite. Cet angle α est par exemple égal à 15° quand il s'agit de passer d'une position code européen pour trafic à gauche à une position code européen pour trafic à droite et inversement.As shown more particularly in FIG. 8, 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 α 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 α 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.

Claims (9)

  1. Headlight for a motor vehicle, comprising a source of light (11), a reflector (20) of the elliptical type, a first focal point of which is situated in the vicinity of the source, a converging lens (75), a focal plane of which passes in the vicinity of a second focal point of the reflector, a first occulting part (50) which is provided between the reflector and the lens, and has an edge (51) which defines a first particular cut-off profile for the light beam emitted, and a second occulting part (70), which is disposed in front of the first occulting part, and is mobile selectively between two positions, i.e. a first position in which an edge (70a) of the second occulting part (70) is positioned on the path of the rays of light, in order to form together with the first occulting part (50) a light beam with a second particular cut-off profile, and a second position in which the said edge of the second occulting part is substantially positioned away from the path of the rays of light in order to form a light beam together with the first cut-off profile, characterised in that the first occulting part (50) is mobile selectively between two positions, i.e. a first position in which the said edge (51) of the first occulting part (50) is positioned on the path of the rays of light in order to form a light beam with the said first cut-off profile, and a second position in which the said edge (51) of the first occulting part (50) is substantially positioned away from the path of the rays of light, in order to form a second light beam without cut-off, and in that the second occulting part (70) is positioned spaced from the first occulting part (50), and in its second position makes it possible to form the said second light beam without cut-off.
  2. Headlight according to claim 1, characterised in that the first occulting part (50) can pivot around an axis (X) which is generally horizontal and is transverse relative to the optical axis (O) of the headlight.
  3. Headlight according to claim 2, characterised in that the first occulting part (50) comprises a plate which is integral with a shaft (54) which can rotate in two bearings (31, 32) which are provided in a framework part (30) of the headlight, which is integral with the reflector (20).
  4. Headlight according to claim 2 or claim 3, characterised in that it is provided with means for manoeuvring the first occulting part in order to tilt it from its first position towards its second position, comprising an actuating rod (61), one end of which is connected to the first occulting part, and the other end of which is connected to an electromagnet (60) which is provided with a return spring, the said electromagnet being designed to be supplied with current in order to actuate the said rod (61), such that it gives rise to pivoting of the said occulting part (50) from the first position towards the second position.
  5. Headlight according to claim 2 or claim 3, characterised in that it is provided with a manual actuating lever which is connected to the first occulting part in order to make it tilt between the first and second positions.
  6. Headlight according to one of claims 1 to 5, characterised in that the second occulting part (70) can pivot around an axis (74) which is generally horizontal and parallel to the optical axis.
  7. Headlight according to claim 6, characterised in that a lateral manual actuating lever (71) is provided, which is connected to the second occulting part in order to tilt it between its first and second positions, and two lateral stops (72, 73) for the said manual actuating lever, which define the two positions of the said second occulting part.
  8. Headlight according to any one of the preceding claims, characterised in that the second occulting part (70) has a substantially rectangular shape with straight edges, with a length which is substantially equal to half that of the first occulting part, and with a narrow width.
  9. Headlight according to any one of the preceding claims, characterised in that the first position of the first occulting part combined with the first and second positions of the second occulting part is a low beam position for traffic driving on the right, traffic driving on the left, or for fog conditions, and the second position of the first occulting part combined with the second position of the second occulting part is a high beam position.
EP00401849A 1999-07-13 2000-06-29 Motor vehicle headlight comprising a displaceable double light shield Expired - Lifetime EP1069373B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9909081 1999-07-13
FR9909081A FR2796447B1 (en) 1999-07-13 1999-07-13 PROJECTOR FOR A MOTOR VEHICLE WITH A DOUBLE MOBILE COVER

Publications (2)

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

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EP00401849A Expired - Lifetime EP1069373B1 (en) 1999-07-13 2000-06-29 Motor vehicle headlight comprising a displaceable double light shield

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302002B6 (en) * 2005-08-10 2010-09-01 Visteon Global Technologies, Inc. Headlight system for motor vehicles
EP1764551B1 (en) * 2005-09-20 2012-11-07 Valeo Vision Elliptical headlamp equiped with a set of multi-positioning shades
DE102006008188A1 (en) * 2006-02-22 2007-08-30 Audi Ag Lighting device for a vehicle
DE102007050207A1 (en) * 2007-10-20 2009-04-23 Hella Kgaa Hueck & Co. Projection headlight for vehicle, has screen device with movable part adjustably arranged in horizontal direction, where device is brought from one operating position into another position by horizontal adjustment of movable part
FR2923775B1 (en) * 2007-11-16 2010-01-08 Valeo Vision ELLIPTICAL PROJECTOR FOR A MOTOR VEHICLE EQUIPPED WITH A VACANCY CACHE
FR2927689B1 (en) 2008-02-14 2015-01-23 Valeo Vision ELLIPTICAL MODULE FOR MOTOR VEHICLE
DE102008011180A1 (en) 2008-02-26 2009-08-27 GM Global Technology Operations, Inc., Detroit Headlight for light of vehicle i.e. motor vehicle, has movable light shade elements that are arranged along circular line and are movably arranged in radial direction adjacent to outlet opening
JP5414246B2 (en) * 2008-11-19 2014-02-12 株式会社小糸製作所 Vehicle headlamp

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 (en) 1989-02-08 1990-07-05 Hella Kg Hueck & Co, 4780 Lippstadt, De
DE19501173A1 (en) * 1995-01-17 1996-07-18 Bosch Gmbh Robert Headlights for vehicles
FR2769071B1 (en) * 1997-09-26 1999-12-03 Valeo Vision ELLIPTICAL PROJECTOR WITH VARIABLE BEAM, PARTICULARLY FOR MOTOR VEHICLE

Also Published As

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

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