EP0982535B1 - Projecteur du type elliptique à cache basculant pour véhicule automobile - Google Patents

Projecteur du type elliptique à cache basculant pour véhicule automobile Download PDF

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Publication number
EP0982535B1
EP0982535B1 EP99401678A EP99401678A EP0982535B1 EP 0982535 B1 EP0982535 B1 EP 0982535B1 EP 99401678 A EP99401678 A EP 99401678A EP 99401678 A EP99401678 A EP 99401678A EP 0982535 B1 EP0982535 B1 EP 0982535B1
Authority
EP
European Patent Office
Prior art keywords
shield
cover
headlight according
headlight
reflector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99401678A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0982535A1 (fr
Inventor
Massimo Valeo Vision Di Tonno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP0982535A1 publication Critical patent/EP0982535A1/fr
Application granted granted Critical
Publication of EP0982535B1 publication Critical patent/EP0982535B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F21S41/60—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
    • F21S41/40—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

Definitions

  • the present invention generally relates to projectors of the elliptical type for a motor vehicle.
  • 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 reflector, 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 cache interposed between the light source and the lens, which obscures the part of the radiation that would otherwise be would spread over this cut.
  • a cut-off beam such as a passing beam or an anti-fog beam
  • a solution known per se, then consists of tilting the movable cover of the projector to position selectively 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.
  • 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.
  • rocker cover arrangement requires the use of bulky and powerful actuating means to ensure with the desired speed the return of the cover from the road position to the code position.
  • Document EP 0 690 261 discloses a rocking cover from a right-hand traffic position to a left-hand traffic position, using an asymmetrical operating arm to generate a stable position by gravity. It is also known from DE 3 806 658 and US 1 761 811 tilting covers using springs or electromagnets.
  • the present invention proposes a novel projector of the elliptical type in which the movable cover arrangement makes it possible in one position to completely disengage the cover from the emitted light beam, and in which the bulk of the actuating system cache for positioning from a first position to a second position and return to the first position is optimized.
  • a projector for a motor vehicle comprising a light source, an elliptical reflector whose first focus is located in the vicinity of the source, a convergent lens having a focal plane passes in the vicinity of a second focus of the reflector, a movable cover provided between the reflector and the lens, which has an edge defining a particular cut-off profile for the emitted light beam, and means for actuating the cover to bring it selectively into two positions a first position in which said edge of the cover is positioned in the path of the light rays to form a first light beam with said cutoff profile, and a second position in which said edge of the cover is substantially positioned out of the path of the light rays for form a second light beam.
  • said actuating means comprise an operating means connected to the cover and adapted to be driven to tilt said cover from the first position to the second position, and provided with a return spring which participates in positioning of the cover in the first position when said operating means is released, and in that the cover is shaped so that its center of gravity is positioned in a predetermined manner relative to the pivot axis of the cover so that said cache has an intrinsic tendency to place itself in the first position.
  • the cover comprises a blade integral with a counterweight.
  • the pivot axis of the cover is generally horizontal and transverse to the optical axis of the projector.
  • the cover moves from the first position to the second position by a rotation of an appropriate angle (here close to 80 °).
  • an appropriate angle here close to 80 °.
  • the cover In the second position it extends in a horizontal plane containing the optical axis, and does not conceal any part of the light beam emitted by the light source of the projector.
  • the shape of the cover is such that it assists the return spring to return the cover in the first position and therefore, the return spring used in the projector according to the invention is smaller.
  • the cover has a center of gravity located, in the first position, below its pivot axis.
  • the blade forming the cover is secured to a shaft capable of rotating in two bearings formed in a frame portion of the projector secured to the reflector.
  • the cache is supported on each of its lateral sides which makes it possible to obtain a good balancing of the cache.
  • the blade and the counterweight form a single piece.
  • the actuating means comprises an actuating rod whose one end is connected to the cover and whose other end is connected to an electromagnet provided with a spring. return, said electromagnet being adapted to be supplied with current to actuate said rod so that it causes the pivoting of the cache from the first position to the second position, and it maintains it in this second position.
  • the rod allows to operate the cover to position it in the second position, under the action of the return spring it allows, together with the action of the counterweight, to stabilize the cover in its first position and avoid that it vibrates when the motor vehicle rolls.
  • the first position is a code position and the second position is a road position.
  • a projector for a motor vehicle 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 10 is in the vicinity of the first focus F1 of said reflector 20.
  • the projector further comprises a convergent lens 70 mounted on a frame portion 40 of the projector secured to the reflector.
  • the focal plane of the convergent lens 70 passes in the vicinity of the second focus F2 of the reflector 20.
  • the projector comprises a mobile cover 50 provided between the reflector 20 and the lens 70.
  • the assembly is mounted, not shown, in a housing closed by an ice.
  • the cover 50 positioned near the focal plane of the lens 70 has an edge 51 adapted to define in the focal plane of said lens, a particular cutoff profile for the emitted light beam.
  • the cover 50 is in the form of a blade and is pivotally mounted about a pivot axis X generally horizontal and transverse to the optical axis O of the projector.
  • the pivotal mounting of the cover 50 on the frame part 30 of the headlamp is achieved by means of a shaft 54 introduced through said cover into orifices 53 provided for this purpose and mounted in two bearings 31, 32. the frame member 30 of the projector so that it is free to rotate in these bearings.
  • the first position is a code position and the second position is a road position.
  • the first and second positions correspond to two positions of the cache for the formation of a different cut-off beam.
  • the first position corresponds to the formation of a different cut beam code beam and the second position is the road position.
  • the cover 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 means for actuating the cover 50 comprise an operating means comprising an actuating rod 61, one end of which is connected to the cover 50 being introduced into a housing 55 provided on a lateral side of the cover 50.
  • the other end of the rod 61 is connected to an electromagnet 60 adapted to actuate said rod 61 by pushing or pulling it so that it causes the pivoting of the cover 50 between the first code position and the second position road .
  • the electromagnet 60 comprises a housing in which are positioned a coil (in the bottom of the housing) and a core, in a conventional manner.
  • the core is movable in translation inside the housing and connected to the end of the actuating rod 61.
  • the core could be a part of the rod 61.
  • the core is biased by a return spring compressed between said inner wall of the housing of the electromagnet and a suitable shoulder of the core. This return spring tends to return the core to a retreated rest position (i.e. to the right in FIG. 2 and upwardly in FIG. 4).
  • the coil of the electromagnet When the coil of the electromagnet is supplied with current, 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 movement exerted on the rod 61 causes it to cause the tilting of the cover 50 from its first code vertical position towards its second horizontal road position and maintains it in this 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, and thus naturally the cover tends to move to the first vertical code position with its counterweight positioned towards the bottom.
  • the frame member 30 comprises an upright 33 which rises vertically along the counterweight 52 on the front side thereof when the cover is in the first code position. The upper end of this amount forms a stable stop for the cache in its second road position, as illustrated.
  • the size of the blade 50 below the axis of rotation is minimal and the counterweight, compact space does not require any additional space compared to the place initially provided in the housing of a classic projector.
  • the behavior of the device is as follows: when the electromagnet is no longer supplied with current, the cover returns to the vertical code position, this under the combined action of the counterweight 52 and the return spring of the electro-magnet. magnet.
  • the return spring therefore does not need to exert a very large restoring force on the rod to cause the return of the cache of the second road position to its first code position with the desired speed, since it is assisted by the the force of gravity exerted by the counterweight 52.
  • the counterweight and the return spring both contribute to maintain the cache in a stable position when the electromagnet is not supplied with power, to avoid such that the cover vibrates when the motor vehicle rolls.
  • the raised position of the cover 50 (position code) is ensured with precision thanks to two lateral tabs 56 of the cover, which bear against the edges of a central opening 35 of the frame part 30.
  • these lateral tabs 56 are offset with respect to the plane of the blade 50 by a distance equal to the thickness of the frame piece, so that, in the code position, said blade 50 is precisely in the plane of the room 30.
  • the plate 33 forming a stop for the road position of the cover can be omitted, in which case it is the limit stop of the core of the electromagnet in its housing which defines the stop position in the road position (the accuracy of which is not decisive in this respect). It comprises on the opposite side to the rod, a stop which, when the electromagnet is not supplied with current, is positioned against an inner wall of the housing, away from the electromagnetic coil.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP99401678A 1998-08-10 1999-07-05 Projecteur du type elliptique à cache basculant pour véhicule automobile Expired - Lifetime EP0982535B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9810246A FR2782147B1 (fr) 1998-08-10 1998-08-10 Projecteur du type elliptique a cache basculant pour vehicule automobile
FR9810246 1998-08-10

Publications (2)

Publication Number Publication Date
EP0982535A1 EP0982535A1 (fr) 2000-03-01
EP0982535B1 true EP0982535B1 (fr) 2007-04-11

Family

ID=9529562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99401678A Expired - Lifetime EP0982535B1 (fr) 1998-08-10 1999-07-05 Projecteur du type elliptique à cache basculant pour véhicule automobile

Country Status (4)

Country Link
EP (1) EP0982535B1 (es)
DE (1) DE69935763T2 (es)
ES (1) ES2285822T3 (es)
FR (1) FR2782147B1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807143B1 (fr) * 2000-03-31 2002-05-17 Valeo Vision Projecteur pour vehicule automobile emettant des faisceaux de profils differents
FR2927147A1 (fr) * 2008-01-31 2009-08-07 Peugeot Citroen Automobiles Sa Projecteur d'eclairage, notamment a module elliptique, pour vehicule automobile, a recuperation d'energie
TWI651489B (zh) * 2018-01-29 2019-02-21 誠益光電科技股份有限公司 智慧頭燈

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1761811A (en) * 1928-02-17 1930-06-03 Evan P Bone Head lamp
GB1504513A (en) * 1974-03-05 1978-03-22 Lucas Electrical Ltd Vehicle lamp unit
DE3806658A1 (de) * 1988-03-02 1989-09-14 Huppertz & Schneider Gmbh & Co Scheinwerfer, insbesondere zum einsatz bei fahrzeugen unter tage
IT1247780B (it) * 1990-11-16 1994-12-30 Carello Spa Proiettore ellittico a due luci per veicoli

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP0982535A1 (fr) 2000-03-01
FR2782147A1 (fr) 2000-02-11
FR2782147B1 (fr) 2001-02-02
DE69935763T2 (de) 2007-12-27
DE69935763D1 (de) 2007-05-24
ES2285822T3 (es) 2007-11-16

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