EP0193631A1 - Vorrichtung zum Abführen von Wärme, insbesondere in Kraftfahrzeugscheinwerfern, Projektoren und dergleichen - Google Patents

Vorrichtung zum Abführen von Wärme, insbesondere in Kraftfahrzeugscheinwerfern, Projektoren und dergleichen Download PDF

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Publication number
EP0193631A1
EP0193631A1 EP85102432A EP85102432A EP0193631A1 EP 0193631 A1 EP0193631 A1 EP 0193631A1 EP 85102432 A EP85102432 A EP 85102432A EP 85102432 A EP85102432 A EP 85102432A EP 0193631 A1 EP0193631 A1 EP 0193631A1
Authority
EP
European Patent Office
Prior art keywords
motor vehicle
searchlights
parabolic reflector
dissipating heat
vehicle headlights
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.)
Withdrawn
Application number
EP85102432A
Other languages
English (en)
French (fr)
Inventor
Mario Bellu
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.)
SACEX SpA
Original Assignee
SACEX SpA
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 SACEX SpA filed Critical SACEX SpA
Priority to EP85102432A priority Critical patent/EP0193631A1/de
Priority to DE198585102432T priority patent/DE193631T1/de
Publication of EP0193631A1 publication Critical patent/EP0193631A1/de
Withdrawn legal-status Critical Current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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
    • 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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/49—Attachment of the cooling means
    • 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
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F21S41/168—Incandescent light sources, e.g. filament or halogen lamps having a filament arranged transversally to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/30—Ventilation or drainage of lighting devices
    • F21S45/33—Ventilation or drainage of lighting devices specially adapted for headlamps
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements

Definitions

  • This invention relates to a device for dissipating heat particularly in motor vehicle headlights, searchlights, and the like.
  • foglights, headlights, and other comparable lighting fixtures carried on motor vehicles and having a parabolic reflector body formed from some plastic material incur the serious problem of how to dissipate the heat, generated by incandescent lamps, when lit inside the reflector body towards the outside thereof.
  • the heat produced is, in some cases quite substantial and may result in deformation of a lamp holder body made of plastics.
  • a conventional approach is that of installing, on the interior of the parabolic reflector body, reflective metal surfaces which practically form a protective shield against the heat for the parabolic reflector.
  • This prior approach whilst providing a surface having good light reflecting properties, is less than fully satisfactory from a functional standpoint of heat. dissipation, because such a protective shield is only effective to protect the surfaces from heat generated by an incandescent lamp, lit inside the reflector body, instead of dissipating the heat to the exterior thereof, and has the additional disadvantage of increasing the manufacturing and assembling costs for the parabolic reflector.
  • the aim of this invention to obviate the above problem by providing a device for dissipating heat particularly in motor vehicle headlights, foglights, and the like, which includes means for encouraging the dissipation of heat, generated by a lit incandescent lamp from the interior to the exterior of a parabolic reflector.
  • a device for dissipating heat particularly in motor vehicle headlights, searchlights, and the like characterised in that it comprises, on the interior of a parabolic reflector, a lamp holder bracket made of a thermally conductive material and having at least one portion thereof in contact with at least one portion of a connection element formed from a thermally conductive material and having at least one other portion thereof, located on the exterior of said parabolic reflector, adapted for thermal conduction contact with the body of a motor vehicle or the like.
  • a device for dissipating heat particularly in motor vehicle headlights, searchlights, and the like comprises a lamp holder bracket 2 located on the interior of a parabolic reflector 1 having a body 1b, formed with a mounting hole 1c and a through hole 1d, and closed at the front open end 1e thereof by a glass panel 1a and may have any suitable configuration.
  • the parabolic reflector 1 includes a plastics body which is coated internally with a reflective layer 20..
  • the lamp holder bracket 2 defines, in a conventional manner a substantially U -shaped configuration formed at an upper portion 2a thereof, with a yoke 3 for engagement with an incandescent lamp 4, and is formed at the bottom portion 2b thereof with a deep hollow 5 adapted to fit into a seat 6 defined in the bottom portion of the body 1b of the reflector 1 at the area where a mounting bracket 11 is located.
  • the lamp holder bracket 2 which is engaged by a lamp retaining spring, indicated at 8, is formed from a thermally conductive material, such as steel or the like.
  • connection element which comprises, in this case, a pin 10, including a mid portion 10b and a head 10c, at least an end part of said. pin 10 opposite to said head 10c being threaded, for engagement, with a threaded nut 10a, also being made of steel, for securing the body of the reflector 1 to a mounting bracket 11, comprising a pair of mutually parallel legs 11b, each having a through hole 11c, 11d formed therein and extending orthogonally from a plane containing a centre portion 11a formed therebetween, said mounting bracket 11 advantageously defining a U-like shape.
  • the mounting bracket 11 is formed at its center portion 11a with a throughgoing hole 12 adapted for engagement by a bolt 13 for fastening to the body of the motor vehicle or the like, whilst said through holes 11c, 11d are adapted for engagement by said pin 10.
  • the pin 10 and its respective locknut 10a practically form a heat bridge between the mounting bracket 11 and lamp holder bracket 2, which bridge is effective to transfer to the outside of the lamp holder most of the heat generated by the incandescent lamp 4 when lit.
  • the pin 10 has its mid-portion 10b in close thermal conduction contact with the lower portion 2b of the lamp holder bracket 2, whilst its outer portion of the pin 10 - including the head 10c and the nut 10a threadedly mounted thereon - is in contact relationship with the legs 11b of the bracket 11, which is located on the exterior of the reflector body, and accordingly is effective to dissipate to the outside thereof any heat generated by the incandescent lamp 4, being assisted also by virtue of the fact that the mid-portion 11a is adapted for contacting a motor vehicle body.
  • the invention achieves its objects, and in particular the fact is outstanding that without employing any added elements but merely altering and rationalising the configuration of the lamp holder bracket, the important advantage is afforded of establishing an internal to external thermal bridge, whilst introducing no risk of water or the like getting into the lamp holding body.
  • the parabolic reflector no longer requires to be made of a metal material separately from the reflector body, but may be simply provided by the reflective coating, indicated at 20, on the inner surface of the reflector body 1 of plastics.
  • any materials, dimensions and contingent shapes may be any selected to meet individual requirements, providing that they are compatible with the intended application.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP85102432A 1985-03-05 1985-03-05 Vorrichtung zum Abführen von Wärme, insbesondere in Kraftfahrzeugscheinwerfern, Projektoren und dergleichen Withdrawn EP0193631A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP85102432A EP0193631A1 (de) 1985-03-05 1985-03-05 Vorrichtung zum Abführen von Wärme, insbesondere in Kraftfahrzeugscheinwerfern, Projektoren und dergleichen
DE198585102432T DE193631T1 (de) 1985-03-05 1985-03-05 Vorrichtung zum abfuehren von waerme, insbesondere in kraftfahrzeugscheinwerfern, projektoren und dergleichen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85102432A EP0193631A1 (de) 1985-03-05 1985-03-05 Vorrichtung zum Abführen von Wärme, insbesondere in Kraftfahrzeugscheinwerfern, Projektoren und dergleichen

Publications (1)

Publication Number Publication Date
EP0193631A1 true EP0193631A1 (de) 1986-09-10

Family

ID=8193346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102432A Withdrawn EP0193631A1 (de) 1985-03-05 1985-03-05 Vorrichtung zum Abführen von Wärme, insbesondere in Kraftfahrzeugscheinwerfern, Projektoren und dergleichen

Country Status (2)

Country Link
EP (1) EP0193631A1 (de)
DE (1) DE193631T1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2742005A1 (fr) * 1995-12-01 1997-06-06 Socop Sa Support d'ampoule a dissipateur de chaleur
WO2003099939A1 (en) 2002-05-27 2003-12-04 Hella Lux Slovenia, Proizvodnja Svetlobne Opreme Za Motorna In Druga Vozila, D.O.O. Lamp with a black or almost black casing made of a polymer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1494768A (fr) * 1966-05-05 1967-09-15 Sev Marchal Perfectionnements apportés aux projecteurs pour véhicules
GB2022234A (en) * 1978-06-06 1979-12-12 Bosch Gmbh Robert Vehicle lamp
EP0071585A1 (de) * 1981-07-29 1983-02-09 SACEX S.p.A. Kraftfahrzeugscheinwerfer mit einer Einrichtung zum Abführen der in der Lichtquelle erzeugten Wärme

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1494768A (fr) * 1966-05-05 1967-09-15 Sev Marchal Perfectionnements apportés aux projecteurs pour véhicules
GB2022234A (en) * 1978-06-06 1979-12-12 Bosch Gmbh Robert Vehicle lamp
EP0071585A1 (de) * 1981-07-29 1983-02-09 SACEX S.p.A. Kraftfahrzeugscheinwerfer mit einer Einrichtung zum Abführen der in der Lichtquelle erzeugten Wärme

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2742005A1 (fr) * 1995-12-01 1997-06-06 Socop Sa Support d'ampoule a dissipateur de chaleur
WO2003099939A1 (en) 2002-05-27 2003-12-04 Hella Lux Slovenia, Proizvodnja Svetlobne Opreme Za Motorna In Druga Vozila, D.O.O. Lamp with a black or almost black casing made of a polymer

Also Published As

Publication number Publication date
DE193631T1 (de) 1987-02-26

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Inventor name: BELLU, MARIO