EP1409922A1 - Motor vehicle headlight with improved electromagnetic shielding means - Google Patents
Motor vehicle headlight with improved electromagnetic shielding meansInfo
- Publication number
- EP1409922A1 EP1409922A1 EP01983640A EP01983640A EP1409922A1 EP 1409922 A1 EP1409922 A1 EP 1409922A1 EP 01983640 A EP01983640 A EP 01983640A EP 01983640 A EP01983640 A EP 01983640A EP 1409922 A1 EP1409922 A1 EP 1409922A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- conductive element
- lamp holder
- conductive
- motor vehicle
- 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.)
- Granted
Links
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 halogen type are more and more frequently used as light sources in such projectors.
- FR 2783593 describes a motor vehicle headlamp, comprising a reflector on which is fixed a lamp holder for mounting a discharge lamp and a high voltage connector capable of being 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 on the reflector so as to be in electrical contact with said layer.
- the connector has a metal shielding envelope.
- the lamp holder or the connector has at least one elastically deformable conductive tab capable of ensuring electrical continuity between the lamp holder and the connector during mounting of said connector.
- this type of electromagnetic shielding called "claw" does not always make it possible to achieve the requirements in terms of shielding mentioned above.
- 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 headlamp for a motor vehicle comprising an at least partially conductive reflector, a lamp holder for supporting a lamp through an orifice of the reflector, this lamp holder having a metal ring connected to the ground 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 over 360 degrees around the orifice to provide electromagnetic shielding between the reflector and the lamp holder .
- the conductive element is fixed to the lamp holder by means of a fixing washer, cooperating with a structure of the lamp holder without altering the anti-corrosion coating of the latter, for example, the fixing washer has tongues capable of penetrating in an opening of the lamp holder;
- the conductive element is fixed to the reflector by means of a collar;
- the conductive element is able to allow a possible backlash between the reflector and the lamp holder or a relative movement between the reflector and the lamp holder; - the conductive element consists of a woven metallic material;
- the conductive element has a spiral shape
- the conductive element consists of cylindrical elements fitted into each other.
- 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 around an axis and between an end intended to be electrically connected to a lamp holder and another end intended to be electrically connected to a conductive zone lining at least in part at least one of the surfaces of a reflector.
- FIG. 1 is a schematic view in horizontal and axial section of part of a projector according to a first embodiment of the invention
- FIG. 2 is a top view of an electromagnetic shielding element such as that fitted to the projector of Figure 1;
- FIG. 3 is a schematic view in horizontal and axial section of the shielding element shown in Figure 2;
- FIG. 4 is a schematic top view of a washer for fixing an electromagnetic shielding element such as that shown in Figures 2 and 3, on the projector shown in Figure 1;
- FIG. 5 is a diagrammatic perspective view of variants of the shielding element shown in FIGS. 2 and 3.
- a motor vehicle headlight there is shown a motor vehicle headlight. Conventionally, this comprises a housing closed at the front by a crystal and defining an interior space, but these elements have not been shown in the drawings for the sake of concern simpimcauon.
- a reflector 2 In the interior space 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 adjusting the positioning 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 intended to receive a pin 12, respectively, of a fixing washer 14.
- this fixing washer 14 consists of a metal washer whose edge corresponding to the inside 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 shape.
- the tongues constituting the pins 12 are flexible and elastic.
- the bottom of the V of each tab enters a lumen 10 (fig. 1). Folded in this way, the tabs have no sharp edges. Therefore, unlike self-locking washers of the "circlip" type often used in mechanics, the fixing washer 14 can be fixed to the metal ring 8 without damaging the anti-corrosion coating of the latter.
- the reflector 2 is produced by injection of thermosetting material
- the reflector 2 has on its rear face an electrically conductive layer 16 produced 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 shielding element 18 electrically connects the conductive layer 16 to the metal ring 8 (Fig.1). As shown in FIG. 3, this conductive element 18 consists of a cylindrical metallic knit 19 stretched between an internal washer 20 integral with the fixing washer 14 (see also FIG. 4) intended to be mounted on the metal ring 8 of the door lamp 4 and a collar 24 intended to be mounted on reflector 2.
- the fixing washer 14 provides electrical continuity between the conductive element 18 and the 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 makes it possible to adapt without interrupting the electrical conduction between the reflector 2 and the lamp holder 4, to possible play between these parts and / or when there is a relative displacement of these parts (for passing low beam, main beam for example).
- the electrical continuity between the reflector 2 and the lamp holder 4 is thus perfectly maintained in all circumstances and is thus completely enveloping as required by the constraints linked to the classes of electromagnetic field to be achieved from now on.
- Figure 5a shows a conductive shielding element 18 in the form of a spiral spring.
- the turns 26 of the spring must be almost contiguous in order to allow only a small amount of electromagnetic waves to pass and thus allow enveloping shielding while allowing possible relative movement of the reflector 2 and the lamp holder 4.
- the section of the turns 26 can be any.
- FIG. 5b represents a conductive shielding element 18 made up of conductive cylindrical pieces 28 nested one inside the other.
- FIG. 5c represents a conductive shielding element 18 consisting of a mesh 30 or a conductive fabric (woven or not).
- 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 can be electrically connected to a connector itself connected to the lamp or to another part capable of forming an enveloping shielding of the projector.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0013918A FR2816035B1 (en) | 2000-10-30 | 2000-10-30 | MOTOR VEHICLE PROJECTOR WITH IMPROVED ELECTROMAGNETIC SHIELDING MEANS |
FR0013918 | 2000-10-30 | ||
PCT/FR2001/003349 WO2002037024A1 (en) | 2000-10-30 | 2001-10-26 | Motor vehicle headlight with improved electromagnetic shielding means |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1409922A1 true EP1409922A1 (en) | 2004-04-21 |
EP1409922B1 EP1409922B1 (en) | 2012-08-01 |
Family
ID=8855897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01983640A Expired - Lifetime EP1409922B1 (en) | 2000-10-30 | 2001-10-26 | Motor vehicle headlight with improved electromagnetic shielding means |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1409922B1 (en) |
ES (1) | ES2394281T3 (en) |
FR (1) | FR2816035B1 (en) |
WO (1) | WO2002037024A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2163814A1 (en) * | 2008-09-16 | 2010-03-17 | Hella KG Hueck & Co. | Reflector for a lighting device for a motor vehicle and production method |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10322627A1 (en) | 2003-05-20 | 2004-12-09 | Hella Kgaa Hueck & Co. | Headlights for vehicles |
DE102010048236A1 (en) * | 2010-10-12 | 2012-04-12 | Odelo Gmbh | Motor vehicle light |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3195215B2 (en) * | 1995-12-28 | 2001-08-06 | 株式会社小糸製作所 | Automotive headlamp |
JP3162290B2 (en) * | 1996-04-30 | 2001-04-25 | 株式会社小糸製作所 | Vehicle lamp having a discharge bulb |
FR2755747B1 (en) * | 1996-11-13 | 1999-01-29 | Valeo Vision | DISCHARGE LAMP PROJECTOR |
FR2769072B1 (en) * | 1997-09-26 | 1999-12-24 | Valeo Vision | MOTOR VEHICLE PROJECTOR EQUIPPED WITH A DISCHARGE LAMP AND IMPROVED ELECTROMAGNETIC SHIELDING MEANS |
FR2783593B1 (en) | 1998-09-21 | 2000-12-29 | Valeo Vision | MOTOR VEHICLE PROJECTOR EQUIPPED WITH A DISCHARGE LAMP AND IMPROVED ELECTROMAGNETIC SHIELDING MEANS |
-
2000
- 2000-10-30 FR FR0013918A patent/FR2816035B1/en not_active Expired - Fee Related
-
2001
- 2001-10-26 ES ES01983640T patent/ES2394281T3/en not_active Expired - Lifetime
- 2001-10-26 EP EP01983640A patent/EP1409922B1/en not_active Expired - Lifetime
- 2001-10-26 WO PCT/FR2001/003349 patent/WO2002037024A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO0237024A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2163814A1 (en) * | 2008-09-16 | 2010-03-17 | Hella KG Hueck & Co. | Reflector for a lighting device for a motor vehicle and production method |
Also Published As
Publication number | Publication date |
---|---|
FR2816035B1 (en) | 2003-04-11 |
EP1409922B1 (en) | 2012-08-01 |
ES2394281T3 (en) | 2013-01-30 |
FR2816035A1 (en) | 2002-05-03 |
WO2002037024A1 (en) | 2002-05-10 |
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