EP1409922B1 - Kraftfahrzeugscheinwerfer mit verbesserter elektromagnetischer abschirmung - Google Patents

Kraftfahrzeugscheinwerfer mit verbesserter elektromagnetischer abschirmung Download PDF

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Publication number
EP1409922B1
EP1409922B1 EP01983640A EP01983640A EP1409922B1 EP 1409922 B1 EP1409922 B1 EP 1409922B1 EP 01983640 A EP01983640 A EP 01983640A EP 01983640 A EP01983640 A EP 01983640A EP 1409922 B1 EP1409922 B1 EP 1409922B1
Authority
EP
European Patent Office
Prior art keywords
reflector
lamp holder
conductive element
motor vehicle
metal ring
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
EP01983640A
Other languages
English (en)
French (fr)
Other versions
EP1409922A1 (de
Inventor
Rémy c/o Valeo Vision CHAVE
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
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1409922A1 publication Critical patent/EP1409922A1/de
Application granted granted Critical
Publication of EP1409922B1 publication Critical patent/EP1409922B1/de
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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/192—Details of lamp holders, terminals or connectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices

Definitions

  • the present invention relates generally to motor vehicle headlamps equipped with a discharge lamp.
  • Discharge lamps in particular of the metal halide type (typically sodium iodide), are more and more frequently used as light sources in such projectors.
  • metal halide type typically sodium iodide
  • a motor vehicle headlamp comprising a reflector on which is fixed a lamp holder for mounting a discharge lamp and a high voltage connector adapted to be attached to the lamp mounted in the lamp holder, to ensure the power supply of this lamp.
  • the reflector has an electrically conductive shielding layer.
  • the lamp holder has a metal part fixed to the reflector so as to be in electrical contact with said layer.
  • the connector has a metal shielding shell.
  • the lamp holder or the connector has at least one elastically deformable conductive tongue capable of ensuring electrical continuity between the lamp holder and the connector during assembly of said connector.
  • the present invention aims to overcome the limitations of the state of the art, to ensure electrical continuity, within a projector, between the reflector and the lamp holder and thus allow good electromagnetic compatibility between these elements.
  • a searchlight for a motor vehicle comprising an at least partially conducting reflector, a lamp holder for supporting a lamp through an orifice of the reflector, this lamp holder having a metal ring connected to the mass of the motor vehicle, and a conductive element electrically connecting the reflector and the metal ring, characterized in that the conductive element extends electrically continuously 360 degrees around the orifice to provide electromagnetic shielding between the reflector and the lamp holder .
  • the shielding more effectively limits the leakage of electromagnetic waves and better meets the requirements of the specifications in terms of shielding.
  • the invention relates to an electromagnetic shielding element for a motor vehicle, characterized in that it consists of a conductive element extending over 360 degrees about an axis and between an end intended to be electrically connected to a lamp holder and another end to be electrically connected to a conductive area at least partially filling at least one of the surfaces of a reflector.
  • a motor vehicle headlight is shown. Conventionally it comprises a housing closed at the front by an ice and defining an interior space, but these elements have not been shown in the drawings for the sake of simplification.
  • a reflector 2 In the interior of the housing is housed a reflector 2 in the region of the bottom of which is mounted a lamp holder 4.
  • the lamp holder 4 has means for fixing and positioning adjustment 6 of the lamp holder 4 in the housing.
  • the lamp holder 4 also has a metal ring 8 connected to the mass of the motor vehicle.
  • the metal ring 8 is pierced with three slots 10 each for receiving a pin 12 of a fixing washer 14.
  • this fixing washer 14 consists of a metal washer whose edge corresponding to the inner diameter is provided with pins 12 extending radially towards the center of the washer.
  • the pins 12 consist of a tongue which has, in section in a plane perpendicular to that of the washer and parallel to a radial direction, a V-shaped.
  • the tabs constituting the pins 12 are flexible and resilient. The bottom of the V of each tongue penetrates into a light 10 ( Fig. 1 ). Folded thus, the tabs do not present sharp edges. Therefore, unlike self-locking washers type "circlip" often used in mechanics, the fixing washer 14 can be attached to the metal ring 8 without damaging the anti-corrosion coating thereof.
  • the reflector 2 is made by injecting thermosetting material (projector of the parabolic type or anotropic reflecting surface of at least a part of the photometry of the beam).
  • the reflector 2 has on its rear face an electrically conductive layer 16 made for example by overmolding the thermosetting material of the reflector 2 on or around a thin metal insert or by physical or chemical deposition an electrically conductive coating.
  • This electrically conductive coating is for example made of aluminum.
  • a conductive element 18 of shielding electrically connects the conductive layer 16 to the metal ring 8 ( Fig.1 ).
  • this conductive element 18 consists of a cylindrical metal knit 19 stretched between an internal washer 20 integral with the fixing washer 14 (see also figure 4 ) intended to be mounted on the metal ring 8 of the lamp holder 4 and a collar 24 intended to be mounted on the reflector 2.
  • Fixing washer 14 provides electrical continuity between conductive element 18 and metal ring 8.
  • the collar 24 provides electrical continuity between the conductive element 18 and the conductive layer 16.
  • the metallic knit 19 is flexible and thus enables the electrical conduction between the reflector 2 and the lamp holder 4 to be continuously adapted without interruption to any existing gaps between these parts and / or when there is a relative displacement of these parts. (for a crossing of low beam, high beam for example).
  • the figure 5 illustrates some of them.
  • the figure 5a represents a conductive element 18 of shielding in the form of a spiral spring.
  • the turns 26 of the spring must be quasi-contiguous so as to allow only a few electromagnetic waves to pass and thus allow a wraparound shield while allowing a possible relative movement of the reflector 2 and the lamp holder 4.
  • the section of the turns 26 can be any.
  • the figure 5b represents a shielding conductive element 18 consisting of conductive cylindrical parts 28 nested one inside the other.
  • the figure 5c represents a shielding conductive element 18 consisting of a grid 30 or a conductive fabric (woven or not).
  • a reflector 2 made of thermosetting material has been described above, but the reflector 2 can be made of stamped sheet metal, in a conventional manner per se.
  • the conductive element 18 is electrically connected to the metal ring 8 of a lamp holder 4 . But in a completely equivalent manner, the conductive element 18 may be electrically connected to a connector itself connected to the lamp or to another room capable of forming a shielding enveloping the projector.

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

Claims (10)

  1. Kraftfahrzeugscheinwerfer mit einem wenigstens teilweise leitfähigen Reflektor (2), einem Lampenträger (4) zum Halten einer Lampe durch eine Öffnung des Reflektors (2) hindurch, wobei der Lampenträger (4) einen mit der Masse des Kraftfahrzeugs verbundenen Metallring (8) aufweist, und einem leitfähigen Element (18), das den Reflektor (2) und den Metallring (8) elektrisch miteinander verbindet, wobei sich das leitfähige Element (18) über 360 Grad um die Öffnung herum elektrisch durchgängig erstreckt, um zwischen dem Reflektor (2) und dem Lampenträger (4) eine elektromagnetische Abschirmung sicherzustellen, dadurch gekennzeichnet, dass das leitfähige Element ein flexibles zylindrisches Metallgewirk (19) umfasst, das zwischen einer inneren Scheibe (20), die mit einer zur Anbringung auf dem Metallring (8) des Lampenträgers (4) bestimmten Befestigungsscheibe (14) fest verbunden ist, und einem zur Anbringung auf dem Reflektor (2) bestimmten Kragen (24) gespannt ist.
  2. Scheinwerfer nach Anspruch 1,
    dadurch gekennzeichnet, dass das leitfähige Element (18) auf dem Lampenträger (4) mittels der Befestigungsscheibe (14) befestigt ist, die mit der Struktur des Lampenträgers (4) zusammenwirkt, ohne hierbei dessen korrosionsbeständige Beschichtung zu beeinträchtigen.
  3. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass das leitfähige Element (18) das eventuell zwischen dem Reflektor (2) und dem Lampenträger (4) vorhandene Spiel auszugleichen oder eine relative Verschiebung zwischen dem Reflektor (2) und dem Lampenträger (4) zuzulassen vermag.
  4. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass das leitfähige Element (18) aus einem gewebten metallischen Werkstoff gebildet ist.
  5. Scheinwerfer nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass das leitfähige Element (18) spiralförmig ist.
  6. Scheinwerfer nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass das leitfähige Element (18) aus ineinandergesteckten zylindrischen Elementen gebildet ist.
  7. Element zur elektromagnetischen Abschirmung für Kraftfahrzeugscheinwerfer, mit einem wenigstens teilweise leitfähigen Reflektor (2) und einem Lampenträger (4) zum Halten einer Lampe durch eine Öffnung des Reflektors (2) hindurch, wobei der Lampenträger (4) einen mit der Masse des Kraftfahrzeugs verbundenen Metallring (8) aufweist, wobei das Abschirmelement aus einem sich über 360 Grad um eine Achse herum erstreckenden leitfähigen Element (18) gebildet ist, das dazu bestimmt ist, sich elektrisch durchgängig um die Öffnung des Reflektors herum zu erstrecken, dadurch gekennzeichnet, dass das leitfähige Element ein flexibles zylindrisches Metallgewirk (19) aufweist, das dazu bestimmt ist, zwischen einer inneren Scheibe (20), die mit einer auf dem Metallring (8) des Lampenträgers (4) angebrachten Befestigungsscheibe (14) fest verbunden ist, und einem zur Anbringung auf dem Reflektor (2) bestimmten Kragen (24) gespannt zu werden.
  8. Abschirmelement nach Anspruch 7,
    dadurch gekennzeichnet, dass das leitfähige Element (18) aus einem gewebten metallischen Werkstoff gebildet ist.
  9. Abschirmelement nach Anspruch 7,
    dadurch gekennzeichnet, dass das leitfähige Element (18) spiralförmig ist.
  10. Abschirmelement nach Anspruch 7,
    dadurch gekennzeichnet, dass das leitfähige Element (18) aus ineinandergesteckten zylindrischen Elementen gebildet ist.
EP01983640A 2000-10-30 2001-10-26 Kraftfahrzeugscheinwerfer mit verbesserter elektromagnetischer abschirmung Expired - Lifetime EP1409922B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0013918 2000-10-30
FR0013918A FR2816035B1 (fr) 2000-10-30 2000-10-30 Projecteur de vehicule automobile a moyens perfectionnes de blindage electromagnetique
PCT/FR2001/003349 WO2002037024A1 (fr) 2000-10-30 2001-10-26 Projecteur de vehicule automobile a moyens perfectionnes de blindage electromagnetique

Publications (2)

Publication Number Publication Date
EP1409922A1 EP1409922A1 (de) 2004-04-21
EP1409922B1 true EP1409922B1 (de) 2012-08-01

Family

ID=8855897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01983640A Expired - Lifetime EP1409922B1 (de) 2000-10-30 2001-10-26 Kraftfahrzeugscheinwerfer mit verbesserter elektromagnetischer abschirmung

Country Status (4)

Country Link
EP (1) EP1409922B1 (de)
ES (1) ES2394281T3 (de)
FR (1) FR2816035B1 (de)
WO (1) WO2002037024A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10322627A1 (de) * 2003-05-20 2004-12-09 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
EP2163814B1 (de) * 2008-09-16 2020-03-11 HELLA GmbH & Co. KGaA Reflektor für eine Beleuchtungsvorrichtung eines Kraftfahrzeugs
DE102010048236A1 (de) * 2010-10-12 2012-04-12 Odelo Gmbh Kraftfahrzeugleuchte

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3195215B2 (ja) * 1995-12-28 2001-08-06 株式会社小糸製作所 自動車用ヘッドランプ
JP3162290B2 (ja) * 1996-04-30 2001-04-25 株式会社小糸製作所 放電バルブを有する車両用灯具
FR2755747B1 (fr) * 1996-11-13 1999-01-29 Valeo Vision Projecteur a lampe a decharge
FR2769072B1 (fr) * 1997-09-26 1999-12-24 Valeo Vision Projecteur de vehicule automobile equipe d'une lampe a decharge et de moyens perfectionnes de blindage electromagnetique
FR2783593B1 (fr) 1998-09-21 2000-12-29 Valeo Vision Projecteur de vehicule automobile equipe d'une lampe a decharge et de moyens perfectionnes de blindage electromagnetique

Also Published As

Publication number Publication date
EP1409922A1 (de) 2004-04-21
ES2394281T3 (es) 2013-01-30
FR2816035A1 (fr) 2002-05-03
FR2816035B1 (fr) 2003-04-11
WO2002037024A1 (fr) 2002-05-10

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