EP0341633A2 - Leuchtvorrichtung mit einer wärmeabführenden Fassung - Google Patents

Leuchtvorrichtung mit einer wärmeabführenden Fassung Download PDF

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Publication number
EP0341633A2
EP0341633A2 EP89108253A EP89108253A EP0341633A2 EP 0341633 A2 EP0341633 A2 EP 0341633A2 EP 89108253 A EP89108253 A EP 89108253A EP 89108253 A EP89108253 A EP 89108253A EP 0341633 A2 EP0341633 A2 EP 0341633A2
Authority
EP
European Patent Office
Prior art keywords
lamp carrier
carrier element
light source
illumination device
lamp
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Withdrawn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
EP89108253A
Other languages
English (en)
French (fr)
Other versions
EP0341633A3 (de
Inventor
Nicola Parisi
Giancarlo Guasconi
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.)
SILT Srl
SIMPLER INTERNATIONAL SpA
Original Assignee
SILT Srl
SIMPLER INTERNATIONAL 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 SILT Srl, SIMPLER INTERNATIONAL SpA filed Critical SILT Srl
Publication of EP0341633A2 publication Critical patent/EP0341633A2/de
Publication of EP0341633A3 publication Critical patent/EP0341633A3/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Withdrawn legal-status Critical Current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
    • F21S41/14—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
    • 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
    • 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
    • F21S41/194—Bayonet attachments
    • 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
    • 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
    • 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
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F21V29/773—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/87—Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
    • 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
    • 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
    • F21S41/435—Hoods or cap-shaped

Definitions

  • the present invention relates to an illumination device such as a headlamp or spotlamp for a vehicle or for the illumination of public places such as squares, streets, offices, shops, shop windows or houses, which is provided with component elements made of synthetic plastics material and uses a light source developing heat energy, such as for example an incandescent lamp.
  • an illumination device such as a headlamp or spotlamp for a vehicle or for the illumination of public places such as squares, streets, offices, shops, shop windows or houses, which is provided with component elements made of synthetic plastics material and uses a light source developing heat energy, such as for example an incandescent lamp.
  • devices of the type defined above usually comprise a body or casing defining (or housing within its interior) a parabolic reflector, the said light source which is supported by a lamp carrier element fixable, in turn, to the rear of the body or casing, a transparent protection element located at the front to close the body or casing, and a lens, usually formed integrally with the transparent protection element, for spreading the light beam produced by the source and concentrated by the reflector, usually parabolic, at the focus of which the light source itself is positioned.
  • the object of the invention is that of providing an illumination device of the type described, utilising a light source also developing heat energy, the structure of which, in particular that of its lamp carrier element, permits a rapid dissipation of the heat produced and, therefore, prevents the illumination device as a whole from suffering a high rise in temperature in use.
  • a further object of the invention is that of providing an illumination device for the construction of which a wide range of synthetic plastics materials can be used.
  • an illumination device in particular a headlamp for a vehicle, comprising a light source developing heat energy, a body housing the said light source and provided with a reflector, a lamp carrier element supported to the rear of the said body and supporting the said light source substantially at a focus of the said reflector, and a lens disposed in such a way as to be able to spread a light beam produced by the light source and concentrated by the reflector, characterised by the fact that the said lamp carrier element is made of a head conductive material and includes radiating means supported so as to project externally from the said body, in correspondence with a housing cavity for the said lamp carrier element formed through the body itself, the said radiating means being able to dissipate into the environment the heat energy produced by the light source and conducted by the lamp carrier element.
  • an illumination device constituted by a headlamp or, in a current but imprecise terminology, a headlight for a motor vehicle is generally indicated with the reference numeral 1;
  • the illumination device or headlamp 1 comprises a body or hollow casing 2 of paraboloid form preferably made of moulded synthetic plastics material, in this example defining within its interior an integrally formed parabolic reflector 3 of known type, and housed within its interior, substantially in correspondence with a focus of the reflector 3, a light source constituted by an electric incandescent lamp or bulb 4, and a transparent front protection element 5 of substantially cup-shape, which is disposed with its concavity facing the light source 4 opposite this latter and closing the front of the body or casing 2 around a perimetral frontal edge 6 to which the element 5 is mechanically fixable in a known manner to form a fluid-tight seal.
  • the element 5, which can be made entirely of glass, or else of a mixed glass/polycarbonate structure, is provided with a front screen 8 in this case defined by a lens adapted so as suitably to spread the light beam produced by the lap 4 and concentrated by the reflector 3; this lens 8, in a possible (but not illustrated) variant can also be made as an element separate from the element 5 and housed within the interior of the body 2, in which case it is preferably made of plastics material, for example polycarbonate.
  • the lamp 4 is supported by a lamp carrier element 10 made of a metal material having a good thermal conductivity, for example a light alloy or die-cast aluminium, which is in turn supported by the body 2 rearwardly thereof, in correspondence with a seat or housing cavity 11 formed in the rear of the body 3 and through which a bulb 9 of the lamp 4 is mounted within this latter at the focus of the reflector 3.
  • a lamp carrier element 10 made of a metal material having a good thermal conductivity, for example a light alloy or die-cast aluminium, which is in turn supported by the body 2 rearwardly thereof, in correspondence with a seat or housing cavity 11 formed in the rear of the body 3 and through which a bulb 9 of the lamp 4 is mounted within this latter at the focus of the reflector 3.
  • the lamp carrier element 10 from hereon indicated, for simplicity, also as the lamp carrier 10, comprises a first concave portion 12 adapted to engage on the outside with the housing cavity 11 to ensure fixing of the lamp carrier element 10 to the body 3, and a second portion 14, which is provided, according to the invention, with radiating means generally indicated 15, which in use ( Figure 1) are supported so as to project out from the body 2 and which are adpated to dissipate into the environment surrounding the projector 1 the heat energy produced by the lamp 4 and which is transmitted from this by conduction, as will be explained, to the lamp carrier 10; the portions 12 and 14 are both shaped as cylindrical sleeves and the portion 14 has a greater diameter and is carried by and projects rearwardly of the portion 12; this latter releasably carries the lamp 4 in a known way within an interior cavity 16 thereof, and is shaped in such a way as to be interposed, when the element 10 is mounted in the cavity 11, between the lamp 4 itself and the body 2 to screen this latter.
  • Fixing of the lamp carrier 10 to the body 2 can be effected in any known way, for example by adhesive or force fitting of the portion 12 into the seat 11, or by fixing means, not illustrated for simplicity, carried externally of the portion 12, such as threaded connectors, bayonets, snap-engagement hooks and the like.
  • the portion 14 of greater diameter is able to abut against the outer edge of the seat 11 to determine the axial position of the lamp carrier 10 itself.
  • this latter is further provided with coupling and fixing means for the lamp 4, of known type generally indicated 18, in the illustrated example adapted to allow a bayonet fixing of the lamp 4 when this is introduced from the rear through the portion 14.
  • the radiating means 15 comprise a radial flange 20 carried by and projecting out from the portion 14 of the lamp carrier element 10, and a plurality of radial fins 21 closely spaced around a ring on the flange 20, in particular on a rearwardly facing surface 22 thereof, facing away from the body 2.
  • the flange 20 is shaped as a frustoconical cap tapering towards the portion 14 and projecting axially from this towards the portion 12, coaxially thereto, and is delimited by a concave front surface 24 facing the body 2 and terminating with its perimetral edge 25 substantially flush with a corresponding perimetral edge 26 of the portion 12, as well as by a convex rear face defined by the surface 22, which carries the fins 21 disposed in respective meridian planes thereof; these latter are in turn delimited by respective curved longitudinal edges 27 having convex outlines.
  • the lamp carrier element 10 is integrally formed with the radiating means 15, which are therefore also made of a material which is a good conductor of heat, such as a light alloy or aluminium, and is further shaped in such a way that it can be made by moulding in one piece together with the radiating means 15.
  • the headlamp 1 further includes a known screen element 30 interposed between the lamp 4 and the lens 8 to intercept light radiated directly from the source or lamp 4 towards the lens 8, or rather the light beams which, not being directed towards the reflector 3, cannot be concentrated thereby and which, therefore, would be able to lower the optical efficiency of the lamp;
  • this screen element 30 is constituted by a metal cap 31, for example spherical and made in the same heat conductive material as the lamp carrier 10, which is disposed close to the lamp 4 and is mechanically and thermally connected with the lamp carrier 10 by means of respective longitudinal conductive support elements 32 intimately connected both with the cap 31 and with the lamp carrier 10, and made of a heat conductive material, for example copper, aluminium or a light alloy, adapted to define respective head bridges between the screen element 30 and the lamp carrier element 10.
  • longitudinal support elements 32 are defined, in this example, by respective metal rods connected peripherally and externally in the said manner both to the lamp carrier element 10, in particular to the portion 12 of this latter, and to the screen element 30, in particular to a suitably shaped peripheral rim 34 of the cap 31.
  • the heat energy produced by the lamp 4 is in part transmitted by conduction to the lamp carrier 10, which transmits it by conduction to the heat radiating means 15 which are able, because of their shape and position, to disperse this heat energy rapidly into the environment partly by radiation and partly by convection, preventing transmission by conduction of the heat from the lamp carrier 10 to the body 2 as takes place in known illumination devices; the remaining part of the heat energy produced by the lamp 4 is for the most part radiated and, therefore, collected by the metal cap 31 which is found in close proximity to the filament 9, or rather to the focus of the reflector 3 inasmuch as the lamp carrier 10 is not located there; the remaining part of the heat energy produced by the lamp 4 escapes therefrom by convective movement of the air enclosed within the interior of the body 2.
  • this latter receives very little heat from the lamp 4 in that the major part of the heat energy produced thereby is intercepted by the cap 31 and the lamp carrier 10, and receives very little heat even from the lamp carrier 10 in that the means 15 disperse the heat energy which is collected by the lamp carrier 10 before this can be transmitted to the body 2; therefore, this latter, in the illumination device according to the invention, no longer runs the risk of overheating and, consequently, can be made without difficulty in synthetic plastics material of low cost; the same argument holds true mostly for the same reasons also for the transparent element 5 and for possible lenses 8 within the body 2; consequently even these elements can be made of plastics material thus producing headlamps of high efficiency, low cost and low weight which are excellent for use on vehicles.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP89108253A 1988-05-13 1989-05-08 Leuchtvorrichtung mit einer wärmeabführenden Fassung Withdrawn EP0341633A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT5314888U 1988-05-13
IT8853148U IT214594Z2 (it) 1988-05-13 1988-05-13 Dispositivo di illuminazione provvisto di portalampada termoradiante

Publications (2)

Publication Number Publication Date
EP0341633A2 true EP0341633A2 (de) 1989-11-15
EP0341633A3 EP0341633A3 (de) 1990-05-23

Family

ID=11280347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108253A Withdrawn EP0341633A3 (de) 1988-05-13 1989-05-08 Leuchtvorrichtung mit einer wärmeabführenden Fassung

Country Status (2)

Country Link
EP (1) EP0341633A3 (de)
IT (1) IT214594Z2 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2679188A1 (fr) * 1991-07-19 1993-01-22 Peugeot Projecteur pour vehicule automobile comportant un lave-projecteur avec rechauffage du liquide de lavage.
US5206558A (en) * 1990-04-28 1993-04-27 Tungsram Reszvenytarsasag Light source provided with light reflecting means
EP0751339A3 (de) * 1995-06-30 1998-05-06 CUNNINGHAM, David W. Beleuchtungseinrichtung mit gegossenem Reflektor
WO2007050547A2 (en) * 2005-10-26 2007-05-03 Acuity Brands, Inc. Lamp thermal management system
WO2008129445A1 (en) * 2007-04-19 2008-10-30 Philips Intellectual Property & Standards Gmbh Lamp
CN109073190A (zh) * 2016-04-27 2018-12-21 株式会社小糸制作所 照明装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5206558A (en) * 1990-04-28 1993-04-27 Tungsram Reszvenytarsasag Light source provided with light reflecting means
FR2679188A1 (fr) * 1991-07-19 1993-01-22 Peugeot Projecteur pour vehicule automobile comportant un lave-projecteur avec rechauffage du liquide de lavage.
EP0751339A3 (de) * 1995-06-30 1998-05-06 CUNNINGHAM, David W. Beleuchtungseinrichtung mit gegossenem Reflektor
WO2007050547A2 (en) * 2005-10-26 2007-05-03 Acuity Brands, Inc. Lamp thermal management system
WO2007050547A3 (en) * 2005-10-26 2009-05-14 Acuity Brands Inc Lamp thermal management system
US7771095B2 (en) 2005-10-26 2010-08-10 Abl Ip Holding, Llc Lamp thermal management system
WO2008129445A1 (en) * 2007-04-19 2008-10-30 Philips Intellectual Property & Standards Gmbh Lamp
CN109073190A (zh) * 2016-04-27 2018-12-21 株式会社小糸制作所 照明装置
CN109073190B (zh) * 2016-04-27 2021-04-20 株式会社小糸制作所 照明装置

Also Published As

Publication number Publication date
IT8853148V0 (it) 1988-05-13
EP0341633A3 (de) 1990-05-23
IT214594Z2 (it) 1990-05-09

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