WO1979000519A1 - Projector for an automobile vehicle headlight - Google Patents

Projector for an automobile vehicle headlight Download PDF

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Publication number
WO1979000519A1
WO1979000519A1 PCT/FR1979/000003 FR7900003W WO7900519A1 WO 1979000519 A1 WO1979000519 A1 WO 1979000519A1 FR 7900003 W FR7900003 W FR 7900003W WO 7900519 A1 WO7900519 A1 WO 7900519A1
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WO
WIPO (PCT)
Prior art keywords
reflector
bulb
cover
filament
projector
Prior art date
Application number
PCT/FR1979/000003
Other languages
French (fr)
Inventor
L Cappai
A Bornet
Original Assignee
L Cappai
A Bornet
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by L Cappai, A Bornet filed Critical L Cappai
Publication of WO1979000519A1 publication Critical patent/WO1979000519A1/en

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Classifications

    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated

Definitions

  • Lighting projector for a motor vehicle
  • the present invention relates to an improved headlamp for equipping a motor vehicle and lighting the road in front of it.
  • the invention relates more particularly to a headlamp of the so-called "low beam” type, usable by vehicles which cross on the same road while driving in opposite directions to one another.
  • Known dipped beam headlamps are theoretically designed so as not to dazzle the driver of an oncoming vehicle.
  • the various optical devices used generally do not make it possible to eliminate certain light rays emanating from the low beam, which directly strike the eyes of the driver of the vehicle traveling in the opposite direction. These light rays are the main cause of glare.
  • the driver's eyes in front of the vehicle are also struck by reflected rays, but these are sufficiently attenuated so as not to be annoying.
  • the object of the invention is to produce a headlamp of the dipped beam type which makes it possible to radically eliminate all the rays likely to point upwards directly in the eyes of a driver of a vehicle arriving in the opposite direction.
  • the invention also aims to achieve a projector capable of receiving bulbs more powerful than those of conventional projectors, the rcgle ⁇ entation in force tending to authorize the use of high lighting powers only for projectors having absolutely no risk of dazzling.
  • An improved headlamp according to the invention intended for a motor vehicle, comprises in particular a reflector inside which an electric bulb is located, this reflector comprising at least one focal point near which the filament of the bulb is placed, and it is characterized in that two covers are provided in the reflector at the front of the bulb, namely:
  • an upper cover which hides the entire upper part of the reflector above a soundly horizontal plane passing through the filament of the electric bulb, this cover comprising a half-moon recess in front of the bulb, this is that is to say in front of the focus of the reflector, -
  • a lower cover located behind the upper cover, at a distance from the latter, and harms the entire lower part of the reflector below a substantially horizontal plane passing through the filament of the electric bulb.
  • the two covers are each located in a plane perpendicular to the geometric axis of the reflector.
  • the rear faces of the covers are reflective.
  • the electric bulb comprises a reflective cup which extends below the filament, the concave face of this cup being turned upwards.
  • the lower cover is limited upwards by an unbroken straight edge.
  • the lower cover has a half-moon recess in front of the focus of the reflector.
  • the bulb is plcicée so that the filament is located slightly behind the focus of the reflector.
  • the reflector has the shape of a por ellipsoid of revolution.
  • the reflector has, overall, the shape of a portion of ellipsoid of revolution with two recesses arranged at the rear of the bulb and symmetrical with respect to the horizontal plane passing through the focus of the reflector, so that the section of the reflector by a transverse plane of the reflector and situated at the rear of the bulb is in the form of an ellipse with a large vertical axis.
  • FIG. 1 is a front view of a projector according to the invention.
  • FIG. 1 is a section II-II (fig 1).
  • FIG. 3 is a front view of the upper cover.
  • FIG. 4 is a front view of the lower cover.
  • FIG. 5 is a front view of the lower cover, according to a variant.
  • FIG. 6 is a front view of the light bulb.
  • FIG. 7 is a section II-II (fig 1), according to a variant.
  • - Figure 8 is a section VIII-VIII (fig 7)
  • FIG. 9 is a side view of a vehicle equipped with headlights according to the invention.
  • FIGS. 1 and 2 show a projector according to the invention, intended for a motor vehicle.
  • This projector comprises a reflector 1 inside of which is a light bulb 2, and the front of which carries a protective glass 3.
  • the shape of the wall of the reflector 1 is that of a portion of ellipsoid of revolution.
  • One of the two focal points 4 of this ellipsoid is located inside the reflector 1, slightly in front of the filament 5 of the bulb.
  • the bulb 2 has a reflective cup 5 a which extends below the filament 5. The concave face of this cup is turned upwards.
  • an upper cover 6 and a lower cover 7 are provided in the reflector at the front of the bulb. These two covers are each located in a plane perpendicular to the geometric axis 8 of the reflector, and they each have a reflective rear face.
  • the upper cover 6, visible more particularly in FIG. 3, hides the entire upper part of the reflector above a substantially horizontal plane passing through the axis 8.
  • This cover comprises, at the front of the hearth 4, a recess in domi-moon 9.
  • the lower cover 7 is situated behind the upper cover 6, at a distance from the latter, to hide the lower part of the reflector below a substantially horizontal plane passing through the axis e.
  • the ach 7 may include a domed recess moon 10 in front of fover 4.
  • the 5o cup. has the function of stopping all the light rays that the filament 5 emits towards the bottom. However, such light rays 11 possibly emitted are stopped by the lower cover 7 after having been reflected by the reflector 1.
  • the upper cover 6 has the function of stopping all the light rays which, like 4th ray 12, would go upwards at the front of the projector. Finally, only the rays of light which, like the beam 13, can go out towards the front of the projector, go towards the vas, settling between the lower edge of the upper cover 6 and the upper edge of the lower cover 7? The beam obtained is very wide and very flat.
  • FIG. 9 shows the beam 14 emitted by a vehicle 15 equipped with two headlights according to the invention.
  • This beam does not dazzle the driver of a vehicle 16 arriving in front of the vehicle 15, because no ray coming from the headlights of the vehicle 15 comes directly to strike the eyes of the driver of the vehicle 16. Thanks to the half-moon recesses 9 and 10 provided in the covers, the headlights are still bright to be visible to the driver of the vehicle 1o.
  • the distance provided between the focal point 4 and the filament 5 is intended to avoid the presence of a "black hole", that is to say the presence of a dark area in the middle of the beam, due to the absence of rays directed forward from the bottom of reflector 1.
  • the filament can be placed at the location of the focus of the reflector 1, but the latter has two recesses 17 arranged at the rear of the bulb 2, and symmetrical to one another with respect to the horizontal plane passing through the axis 8.
  • the section of the reflector by a plane perpendicular to the axis 8 and located at the rear of the bulb 2 is in the shape of an ellipse with a large vertical axis ( Figure 8).
  • the recesses 17 make it possible to avoid the "black hole”.
  • the main advantage of the projector according to the invention is that it is not dazzling, while remaining practically as compact as a conventional projector. Furthermore, it makes it possible to use a much more powerful light source than that of known projectors, the power of the source not being limited here by glare considerations.
  • the headlight according to the invention is not limited to the sole case of low beam or "codes”: it can also be used as a high beam, for driving in "full headlights”.
  • a variant of this type has been illustrated in broken lines in FIG. 7.
  • the lower cover 7 is then replaced by a concave reflector 18 provided with a bulb 19 which the driver switches on only for driving in full headlights.
  • the front face of the reflector 18 then plays an illuminating role using the bulb 19.
  • the rear face 20 of the reflector 18 occul ⁇ in any case certain rays emitted by the bulb 2, as well as did the cover 7, the outline of which was the same as that of the reflector 18.

Abstract

A projector for an automobile vehicle headlight. The projector comprises, inside a reflector (1) having the form of a portion of a revolution ellipsoid, an upper cover (6) and a lower cover (7) placed in front of the lamp bulb (2), so as to cover respectively the upper and the lower parts of the reflector starting from a nearly horizontal plane going through the axis (8) of the reflector. Use: non-dazzling projector.

Description

Projecteur d'éclairage pour un véhicule automobile. Lighting projector for a motor vehicle.
La présente invention concerne un projecteur perfectionné pour équiper un véhicule automobile et éclairer la route devant lui.The present invention relates to an improved headlamp for equipping a motor vehicle and lighting the road in front of it.
L'invention concerne plus particulièrement un projecteur du type dit : "feu de croisement", utilisable par des véhicules qui se croisent sur une même route en roulant en sens inverse l'un de l'autre.The invention relates more particularly to a headlamp of the so-called "low beam" type, usable by vehicles which cross on the same road while driving in opposite directions to one another.
Les feux de croisement de type connu sont théoriquement conçus de façon à ne pas éblouir le conducteur d'un véhicule arrivant en sens inverse. Dans la pratique, les divers dispositifs optiques utilisés ne permettent généralement pas d'éliminer certains rayons lumineux issus du feu de croisement, qui viennent directement frapper les yeux du conducteur du véhicule roulant en sens inverse. Ces rayons lumineux constituent la cause principale de l'éblouissèment. Les yeux du conducteur placé en face du véhicule sont également frappés par des rayons réfléchis, mais ceux-ci sont suffisamment atténués pour ne pas être gênants.Known dipped beam headlamps are theoretically designed so as not to dazzle the driver of an oncoming vehicle. In practice, the various optical devices used generally do not make it possible to eliminate certain light rays emanating from the low beam, which directly strike the eyes of the driver of the vehicle traveling in the opposite direction. These light rays are the main cause of glare. The driver's eyes in front of the vehicle are also struck by reflected rays, but these are sufficiently attenuated so as not to be annoying.
On connaît par ailleurs certains dispositifs plus ou moins compliqués permettant une élimina tion des rayons lumineux incrimines. Toutefois, ces dispositifs sont tellement plus encombrants qu'un projecteur classique qu'il est pratiquement impossible de les loger sur les véhicules automobiles de série, le montage de ces dispositifs ne pouvant être effectué qu'au prix de transformations très coûteuses des véhicules.We also know some more or less complicated devices for eliminating tion of the offending light rays. However, these devices are so much more bulky than a conventional headlamp that it is practically impossible to accommodate them on mass-produced motor vehicles, the mounting of these devices can only be carried out at the cost of very costly conversions of the vehicles.
L'invention a pour but de réaliser un projecteur du type des feux de croisement qui permette d'éliminer radicalement tous les rayons susceptibles de se diriger vers le haut directement dans les yeux d'un conducteur d'un véhicule arrivant en sens inverse.The object of the invention is to produce a headlamp of the dipped beam type which makes it possible to radically eliminate all the rays likely to point upwards directly in the eyes of a driver of a vehicle arriving in the opposite direction.
L'invention a également pour but de réaliser un projecteur capable de recevoir des ampoules plus puissantes que celles des projecteurs classiques, la rcgleαentation en vigueur tendant à n'autoriser l'utilisation de fortes puissances d'éclairage que pour les projecteurs ne comportant absolument aucun risque d'éblouissèment.The invention also aims to achieve a projector capable of receiving bulbs more powerful than those of conventional projectors, the rcgleαentation in force tending to authorize the use of high lighting powers only for projectors having absolutely no risk of dazzling.
Un projecteur perfectionné suivant l'invention, destiné à un véhicule automobile, comprend notamment un réflecteur à l'intérieur duquel se trouve une ampoule électrique, se réflecteur comportant au moins un foyer à proximité duquel est placé le filament de l'ampoule, et il est caractérisé en ce que deux caches sont prévus dans le réflecteur à l'avant de l'ampoule, à savoir :An improved headlamp according to the invention, intended for a motor vehicle, comprises in particular a reflector inside which an electric bulb is located, this reflector comprising at least one focal point near which the filament of the bulb is placed, and it is characterized in that two covers are provided in the reflector at the front of the bulb, namely:
- un cache supérieur qui cache toute la partie haute du réflecteur au-dessus d'un plan sonciblement horizontal passant par le filament de l'ampoule électrique, ce cache comportant un évidement en demi-lune en face de l'ampoule, c'est-à-dire en avant du foyer du réflecteur, - un cache inférieur, situe en arrière du cache supérieur, à distance de ce dernier, et nui cache toute la partie basse du réflecteur au-dessous d'un plan sensiblement horizontal passant par le filament de l'ampoule électrique.- an upper cover which hides the entire upper part of the reflector above a soundly horizontal plane passing through the filament of the electric bulb, this cover comprising a half-moon recess in front of the bulb, this is that is to say in front of the focus of the reflector, - A lower cover, located behind the upper cover, at a distance from the latter, and harms the entire lower part of the reflector below a substantially horizontal plane passing through the filament of the electric bulb.
Suivant une caractéristique supplémentaire de l'invention, les deux caches sont situés chacun dans un plan perpendiculaire à l'axe géométrique du réflecteur.According to an additional characteristic of the invention, the two covers are each located in a plane perpendicular to the geometric axis of the reflector.
Suivant une caractéristique supplémentaire de l'invention, les faces arrière des caches sont réfléchissantes.According to an additional characteristic of the invention, the rear faces of the covers are reflective.
Suivant une caractéristique supplémentaire de l'invention, l'ampoule électrique comporte une coupelle réflectrice qui s'étend au-dessous du filament, la face concave de cette coupelle étant tournée vers le haut.According to an additional characteristic of the invention, the electric bulb comprises a reflective cup which extends below the filament, the concave face of this cup being turned upwards.
Suivant une caractéristique supplémentaire de l'invention, le cache inférieur est limité vers le haut par un bord rectiligne ininterrompu.According to an additional characteristic of the invention, the lower cover is limited upwards by an unbroken straight edge.
Suivant une variame de l'invention, le cache inférieur comporte un avidement en demi-lune en avant du foyer du réflecteur.According to a variame of the invention, the lower cover has a half-moon recess in front of the focus of the reflector.
Suivant une caractéristique supplémentaire de l'invention, l'ampoule est plcicée de façon que le filament soit situé légèrement à l'arrière du foyer du réflecteur.According to an additional feature of the invention, the bulb is plcicée so that the filament is located slightly behind the focus of the reflector.
Suivant une caractéristique supplémentaire de l'invention, le réflecteur a la forme d'une por tion d'ellipsoïde de révolution.According to an additional characteristic of the invention, the reflector has the shape of a por ellipsoid of revolution.
Suivante une variant de l'invention, le réflecteur a, dans l'ensemble, la forme d'une portion d'ellipsoïde de révolution avec deux renfoncements disposés à l'arrière de l'ampoule et symétriques par rapport au plan horizontal passant par le foyer du réflecteur, si bien que la section du réflecteur par un plan transversal du réflecteur et situé à l'arrière de l'ampoule est en forme d'ellipse à grand axe vertical.Following a variant of the invention, the reflector has, overall, the shape of a portion of ellipsoid of revolution with two recesses arranged at the rear of the bulb and symmetrical with respect to the horizontal plane passing through the focus of the reflector, so that the section of the reflector by a transverse plane of the reflector and situated at the rear of the bulb is in the form of an ellipse with a large vertical axis.
Le dessin annexé, donné à titre d'exemple non limitatif, permettra de mieux comprendre les caractér istiques de l'invention.The appended drawing, given by way of nonlimiting example, will allow a better understanding of the characteristics of the invention.
- Figure 1 est une vue de face d'un projecteur suivant l'invention.- Figure 1 is a front view of a projector according to the invention.
- Figure 2 est une section II-II (fig 1).- Figure 2 is a section II-II (fig 1).
- Figure 3 est une vue de face du cache supérieur.- Figure 3 is a front view of the upper cover.
- Figure 4 est une vue de face du cache inférieur.- Figure 4 is a front view of the lower cover.
- Figure 5 est une vue de face du cache inférieur, suivant une variante.- Figure 5 is a front view of the lower cover, according to a variant.
- Figure 6 est une vue de face de l'ampoule électrique.- Figure 6 is a front view of the light bulb.
- Figure 7 est une section II-II (fig 1), suivant une variante. - Figure 8 est une section VIII-VIII (fig 7)- Figure 7 is a section II-II (fig 1), according to a variant. - Figure 8 is a section VIII-VIII (fig 7)
- Figure 9 est une vue latérale d'un véhicule équipé de projecteurs suivant l'invention.- Figure 9 is a side view of a vehicle equipped with headlights according to the invention.
On a représenté sur les figures 1 et 2 un projecteur suivant l'invention, destiné à un véhicule automobile. Ce projecteur comprend un réflecteur 1 à l'intérieur duquel se trouve une ampoule électrique 2, et dont l'avant porte un verre protecteur 3.FIGS. 1 and 2 show a projector according to the invention, intended for a motor vehicle. This projector comprises a reflector 1 inside of which is a light bulb 2, and the front of which carries a protective glass 3.
La forme de la paroi du réflecteur 1 est celle d'une portion d'ellipsoïde de révolution. L'un des deux foyers 4 de cet ellipsoïde est situé à l'intérieur du réflecteur 1, légèrement en avant du filament 5 de l'ampoule. En se reportant plus particulièrement à la figure 6, on notera que l'ampoule 2 compote une coupelle réfléchissante 5 a qui s'étend au-dessous du filament 5. La face concave de cette coupelle est tournée vers le haut.The shape of the wall of the reflector 1 is that of a portion of ellipsoid of revolution. One of the two focal points 4 of this ellipsoid is located inside the reflector 1, slightly in front of the filament 5 of the bulb. Referring more particularly to FIG. 6, it will be noted that the bulb 2 has a reflective cup 5 a which extends below the filament 5. The concave face of this cup is turned upwards.
un cache supérieur 6 et un cache inférieur 7 sont prévus dans le réflecteur à l'avant de l'ampoule. Ces deux caches sont situés chacun dans un plan perpendiculaire à l'axe géométrique 8 du réflecteur, et ils comportent chacun une face arrière réfléchissante. Le cache supérieur 6, visible plus particulièrement sur la figure 3, cache toute la partie haute du réflecteur au-dessus d'un plan sensiblement horizontal passant par l'axe 8. Ce cache comporte, à l'avant du foyer 4, un évidement en domi-lune 9. Le cache inférieur 7 est situé en arrière du cache supérieur 6, à distance de ce dernier, pour cacher la partie basse du réflecteur au-dessous d'un plan sens i blement horizontal passant par l ' axe é. Eventuelle ¬ment , le c ach e 7 peut comporter un évidement en domi lune 10 à l'avant du fover 4.an upper cover 6 and a lower cover 7 are provided in the reflector at the front of the bulb. These two covers are each located in a plane perpendicular to the geometric axis 8 of the reflector, and they each have a reflective rear face. The upper cover 6, visible more particularly in FIG. 3, hides the entire upper part of the reflector above a substantially horizontal plane passing through the axis 8. This cover comprises, at the front of the hearth 4, a recess in domi-moon 9. The lower cover 7 is situated behind the upper cover 6, at a distance from the latter, to hide the lower part of the reflector below a substantially horizontal plane passing through the axis e. Optionally, the ach 7 may include a domed recess moon 10 in front of fover 4.
Le fonctionnement est le suivantThe operation is as follows
La coupelle 5o. a pour fonction d'arrêter tous les rayons lumineux que le filament 5 émet en direction du bas. Toutefois, de tels rayons lumineux 11 éventuellement émis sont stoppés par le cache inférieur 7 après aveir été réfléchis par le réflecteur 1. Le cache supérieur 6 a pour fonction de stopper tous les rayons lumineux qui, tels 4e rayon 12, partiraient vers le haut à l'avant du projecteur. Finalement, seuls peuvent sortir vers l'avant du projecteur les rayons lumineux qui, comme le rayon 13, partent vers le vas en nassant entre le bord inférieur du cache supérieur 6 et le bord supérieur du cache inférieur 7? Le faisceau obtenu est très large et très plat. On a représenté sur la figure 9 Ie faisceau 14 émis par un véhicule 15 équipé de deux projecteurs suivant l'invention. Ce faisceau n'éblouit pas le conducteur d'un véhicule 16 arrivant en face du véhicule 15, car aucun rayon issu des projecteurs du véhicule 15 ne vient directement frapper les yeux du conducteur du véhicule 16. Grâce aux évidements en demi-lune 9 et 10 prévus dans les caches, les projecteurs restent tout de même brillants pour être visibles du conducteur du véhicule 1o. La distance ménagée entre le foyer 4 et le filament 5 a pour but d'éviter la présence d'un "trou noir", c'est-à-dire la présence d'une zone sombre au milieu du faisceau, due à l'absence de rayons dirigés vers l'avant à partir du fond du réflecteur 1.The 5o cup. has the function of stopping all the light rays that the filament 5 emits towards the bottom. However, such light rays 11 possibly emitted are stopped by the lower cover 7 after having been reflected by the reflector 1. The upper cover 6 has the function of stopping all the light rays which, like 4th ray 12, would go upwards at the front of the projector. Finally, only the rays of light which, like the beam 13, can go out towards the front of the projector, go towards the vas, settling between the lower edge of the upper cover 6 and the upper edge of the lower cover 7? The beam obtained is very wide and very flat. FIG. 9 shows the beam 14 emitted by a vehicle 15 equipped with two headlights according to the invention. This beam does not dazzle the driver of a vehicle 16 arriving in front of the vehicle 15, because no ray coming from the headlights of the vehicle 15 comes directly to strike the eyes of the driver of the vehicle 16. Thanks to the half-moon recesses 9 and 10 provided in the covers, the headlights are still bright to be visible to the driver of the vehicle 1o. The distance provided between the focal point 4 and the filament 5 is intended to avoid the presence of a "black hole", that is to say the presence of a dark area in the middle of the beam, due to the absence of rays directed forward from the bottom of reflector 1.
Suivant une variante illustrée sur les figures 7 et 8, le filament peut être placé à l'emplacement du foyer du réflecteur 1, mais ce dernier présente deux renfoncements 17 disposés à l'arrière de l'ampoule 2, et symétriques l'un de l'autre par rapport au plan horizontal passant par l'axe 8. La section du réflecteur par un plan perpendiculaire à l'axe 8 et situé à l'arrière de l'ampoule 2 est en forme d'ellipse à grand axe vertical (figure 8).According to a variant illustrated in Figures 7 and 8, the filament can be placed at the location of the focus of the reflector 1, but the latter has two recesses 17 arranged at the rear of the bulb 2, and symmetrical to one another with respect to the horizontal plane passing through the axis 8. The section of the reflector by a plane perpendicular to the axis 8 and located at the rear of the bulb 2 is in the shape of an ellipse with a large vertical axis (Figure 8).
Les renfoncements 17 permettent d'éviter le "trou noir".The recesses 17 make it possible to avoid the "black hole".
Le principal avantage du projecteur suivant l'invention est de ne pas être éblouissant, tout en restant pratiquement aussi compact qu'un projecteur classique. Par ailleurs, il permet d'utiliser une source lumineuse beaucoup plus puissante nue celle des projecteurs connus, la puissance de la source n'étant ici pas limitée par des considérations d'éblouissement.The main advantage of the projector according to the invention is that it is not dazzling, while remaining practically as compact as a conventional projector. Furthermore, it makes it possible to use a much more powerful light source than that of known projectors, the power of the source not being limited here by glare considerations.
Bien entendu, le projecteur selon l'invention ne se limite pas au seul cas des feux de croisement ou "codes" : il peut aussi être utilisé comme feu de route, pour rouler en "pleins phares". Une variante de ce type a été illustrée en traits interrompus sur la Fig. 7 . Le cache inférieur 7 est alors remplacé par un réflecteur concave 18 muni d'une ampoule 19 que le conducteur allume uniquement pour rouler en pleins phares. La face avant du réflecteur 18 joue alors un rôle d'éclairement à l'aide de l'ampoule 19. Par contre, la face arrière 20 du réflecteur 18 occul¬te dans tous les cas certains rayons émis par l'ampoule 2, ainsi que le faisait le cache 7 dont le contour était le même que celui du réflecteur 18. Of course, the headlight according to the invention is not limited to the sole case of low beam or "codes": it can also be used as a high beam, for driving in "full headlights". A variant of this type has been illustrated in broken lines in FIG. 7. The lower cover 7 is then replaced by a concave reflector 18 provided with a bulb 19 which the driver switches on only for driving in full headlights. The front face of the reflector 18 then plays an illuminating role using the bulb 19. On the other hand, the rear face 20 of the reflector 18 occul¬ in any case certain rays emitted by the bulb 2, as well as did the cover 7, the outline of which was the same as that of the reflector 18.

Claims

REVENDICATIONS
1. Projecteur perfectionné pour véhicule automobile, comprenant notamment un réflecteur à l'intérieur duquel se trouve une ampoule électrique, ce réflecteur comportant au moins un foyer à proximité duquel est placé le filament de l'ampoule, tandis que deux caches sont prévus dans le réflecteur à l'avant de l'ampoule, à savoir d'une part un cache supérieur qui cache toute la partie haute du réflecteur au-dessus d'un plan sensiblement horizontal passant par le filament de l'ampoule électrique, ce cache étant situé dans un plan perpendiculaire à l'axe géométrique du réflecteur, et d'autre part un cache inférieur situé en arrière du cache supérieur, à distance de ce dernier, et qui cache sensiblement toute la partie basse du réflecteur au-dessous d'un plan sensiblement horizontal passant par le filament de l'ampoule éle c t trique, caractérisé, en ce que chaque cache en face de l'ampoule, c'est-à-dire en avant du foyer du réflecteur, un évidement en demi-lune.1. Improved headlamp for a motor vehicle, comprising in particular a reflector inside which is a light bulb, this reflector comprising at least one focus near which the filament of the bulb is placed, while two covers are provided in the reflector at the front of the bulb, namely on the one hand an upper cover which hides the entire upper part of the reflector above a substantially horizontal plane passing through the filament of the electric bulb, this cover being located in a plane perpendicular to the geometric axis of the reflector, and on the other hand a lower cover situated behind the upper cover, at a distance from the latter, and which hides substantially the entire lower part of the reflector below a plane substantially horizontal passing through the filament of the electric bulb, characterized in that each cover in front of the bulb, that is to say in front of the focus of the reflector, a recess in half Moon.
2. Projecteur suivant la revendication 1, caractérisé en ce que la face arrière de chaque cache esx réfléchissante.2. Projector according to claim 1, characterized in that the rear face of each reflective esx cover.
3. Projecteur suivant l'une quelconque des revendications 1 et 2, caractérisé en ce que l'ampoule est placée de façon que son filament soiτ situé légèrement à l'arrière du foyer du réflecteur.3. Projector according to any one of claims 1 and 2, characterized in that the bulb is placed so that its filament soiτ located slightly behind the focus of the reflector.
4. Projecteur suivant l'une quelconque des revendications 1 et 2, caractérisé en ce que le réflecteur inférieur comporte deux rendoncements disposés à l'arrière de l'ampoule, symétriquement par rapport au plan horizontal passant par le foyer du réflecteur, de façon que la section du réflecteur par un plan perpendiculaire à l'axe du réflecteur soit en forme d'ellipse à grand axe vertical.4. Projector according to any one of claims 1 and 2, characterized in that the lower reflector comprises two recesses arranged at the rear of the bulb, symmetrically with respect to the horizontal plane passing through the focal point of the reflector, so that the section of the reflector by a plane perpendicular to the axis of the reflector is in the form of an ellipse with a large vertical axis.
5. Projecteur suivant l'une quelconque des revendications précédentes, caractérisé en ce que son cache inférieur comporte une face avant concave et réfléchissante au centre de laquelle se trouve une seconde ampoule que le conducteur peut allumer lorsqu'il veut rouler en "pleins phares". 5. Projector according to any one of the preceding claims, characterized in that its lower cover has a concave and reflective front face in the center of which is a second bulb that the driver can light when he wants to drive in "full headlights" .
PCT/FR1979/000003 1978-01-17 1979-01-17 Projector for an automobile vehicle headlight WO1979000519A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7802093A FR2414680A1 (en) 1978-01-17 1978-01-17 PERFECTED PROJECTOR FOR A MOTOR VEHICLE
FR7802093 1978-01-17

Publications (1)

Publication Number Publication Date
WO1979000519A1 true WO1979000519A1 (en) 1979-08-09

Family

ID=9203816

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1979/000003 WO1979000519A1 (en) 1978-01-17 1979-01-17 Projector for an automobile vehicle headlight

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EP (1) EP0003940A1 (en)
FR (1) FR2414680A1 (en)
WO (1) WO1979000519A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019664A1 (en) * 1997-10-15 1999-04-22 Robert Bosch Gmbh Vehicle headlight

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002184219A (en) * 2000-12-18 2002-06-28 Koito Mfg Co Ltd Vehicle head light
JP2002367411A (en) * 2001-06-05 2002-12-20 Koito Mfg Co Ltd Vehicle headlamp

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495417A (en) * 1923-10-23 1924-05-27 Ische Hubert Headlight deflector
US1538014A (en) * 1924-03-03 1925-05-19 Ireta L Escher Vehicle headlight
US1549987A (en) * 1923-12-08 1925-08-18 Henry F Juergens Searchlight
US2228476A (en) * 1939-11-15 1941-01-14 I P Whitaker Headlight glare eliminator
FR1469949A (en) * 1966-02-23 1967-02-17 Non-glare low beam
FR2135432A1 (en) * 1971-05-04 1972-12-22 Laribe Armand

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1495417A (en) * 1923-10-23 1924-05-27 Ische Hubert Headlight deflector
US1549987A (en) * 1923-12-08 1925-08-18 Henry F Juergens Searchlight
US1538014A (en) * 1924-03-03 1925-05-19 Ireta L Escher Vehicle headlight
US2228476A (en) * 1939-11-15 1941-01-14 I P Whitaker Headlight glare eliminator
FR1469949A (en) * 1966-02-23 1967-02-17 Non-glare low beam
FR2135432A1 (en) * 1971-05-04 1972-12-22 Laribe Armand

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999019664A1 (en) * 1997-10-15 1999-04-22 Robert Bosch Gmbh Vehicle headlight

Also Published As

Publication number Publication date
FR2414680A1 (en) 1979-08-10
EP0003940A1 (en) 1979-09-05

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