EP2601438B1 - Dispositif d'éclairage pour routes - Google Patents

Dispositif d'éclairage pour routes Download PDF

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Publication number
EP2601438B1
EP2601438B1 EP11743501.6A EP11743501A EP2601438B1 EP 2601438 B1 EP2601438 B1 EP 2601438B1 EP 11743501 A EP11743501 A EP 11743501A EP 2601438 B1 EP2601438 B1 EP 2601438B1
Authority
EP
European Patent Office
Prior art keywords
dome
circuit board
spring element
lighting device
mounting
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.)
Not-in-force
Application number
EP11743501.6A
Other languages
German (de)
English (en)
Other versions
EP2601438A2 (fr
Inventor
Alexander Kerpe
Hendrik Kleinemeier
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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 Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Priority to PL11743501T priority Critical patent/PL2601438T3/pl
Publication of EP2601438A2 publication Critical patent/EP2601438A2/fr
Application granted granted Critical
Publication of EP2601438B1 publication Critical patent/EP2601438B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/004—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by deformation of parts or snap action mountings, e.g. using clips
    • 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
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0055—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by screwing
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • 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
    • F21V29/80—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with pins or wires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lighting device for streets with a number of light sources, with a printed circuit board, on top of which the light source is arranged, and with a heat sink or a housing, which is connected to the underside of the printed circuit board facing away from the light source with the same.
  • Street lighting devices comprise a housing for receiving light sources, optical parts such as reflectors and lenses, and are usually mounted on a mast from which they illuminate the road.
  • LED light sources or LED chips are now used, which are arranged next to possibly other electronic components on a circuit board.
  • a heat sink or a housing with good thermal conductivity is attached to an underside of the printed circuit board facing away from the light source.
  • the circuit board is connected by screwing or gluing to the heat sink or to the housing. The disadvantage of this is that no long-term stable contact pressure between the circuit board and the heat sink can be maintained, so that the heat dissipation to the heat sink is not ensured in each case.
  • US 2001/055198 A1 discloses mounting a heat sink to an integrated circuit disposed on a circuit board.
  • the heat input surface of the heat sink is placed on the side facing away from the board of the integrated circuit and clamped with a resilient mounting arbor against the board, so that the integrated circuit between the board and the heat sink is clamped.
  • US 2010 / 073929A1 discloses a lighting device with a plurality of light sources, each sitting in a recess of a housing base. By placing a complementary housing upper part, the light sources are fixed in the recess. The two housing halves are held together by slotted pins with laterally arranged locking lugs, which sit in corresponding recesses. The light sources each have a board on which an LED sits. They light sources are connected in series via metallic contact strips. The housing halves and the contact strips have superimposed recesses for attaching a heat sink to the housing.
  • Object of the present invention is therefore to develop a lighting device with a number of light sources, which are placed on a circuit board, such that in a simple way long-term stable heat dissipation is ensured to a heat sink or a housing.
  • the invention in connection with the preamble of claim 1, characterized in that the heat sink or the housing has a mounting dome, which rises through a bore of the circuit board from an extension plane thereof and that at the Befest Trentsdom a Fixed spring element which presses with a projecting at an angle from the mounting dome spring arm on an upper side of the circuit board.
  • the particular advantages of the invention is that a long-term stable contact force between a at least one light source having printed circuit board on the one hand and a heat sink or a housing on the other hand is achieved, which allows a good heat transfer from the circuit board to the heat sink or to the housing.
  • the basic idea of the invention is to fasten a spring element spaced from an extension plane of the printed circuit board to a mounting dome of the heat sink so that at least one spring arm of the spring element projecting from the fastening point presses against an upper side of the printed circuit board and thus presses against a surface of the heat sink or of the heat sink Housing presses.
  • the spring element thus serves as a pressure spring, which is fixed at a distance from the top of the circuit board to the mounting dome of the heat sink and the housing.
  • the spring element has a central portion with an opening and at least one laterally projecting spring arm, which extends at an acute angle to the central portion.
  • the opening of the central portion allows attachment in a region of a free end of the mounting dome.
  • the distance of the attachment point to the extension plane of the circuit board is chosen so that a sufficient contact force can be exerted by the spring arms on the circuit board.
  • the fastening dome may be formed as a rivet dome, which is integrally connected to the heat sink or the housing.
  • the spring element In the region of a rivet head of the rivet dome, the spring element is clamped over its central portion.
  • an optical element of the lighting device such as a reflector or a lens, can be held.
  • the spring element directs the force exclusively on the circuit board and the rivet dome, but not on the optical element.
  • a setting process in the plastic material of the optical element thus has no influence on the attachment of the printed circuit board. Determine the spring geometry and material thickness of the spring element the size of the force on the circuit board.
  • the attachment of the circuit board and the optical element can be done in one step.
  • the fastening dome can be designed as a hollow receiving mandrel, which cooperates with a fastening screw and clamps a central portion of the spring element on the cooling body or the housing.
  • an optical element for example a reflector or a lens or a holding part for the same, can be held without the spring element exerting a force on the optical element.
  • the attachment of the circuit board and the optical element can be done in one step.
  • the fastening screws is designed as a self-tapping screw, so that the production cost is reduced.
  • the spring element is formed in one piece and consists of a durable material, preferably made of a spring steel material.
  • the orientation of the spring arm or the spring geometry and the wall thickness of the spring element determine the contact pressure on the circuit board.
  • the spring element may be formed as a stamped part.
  • the spring arm of the spring element at a free end on a bent foot which is formed linear or planar and thus allows a line pressure or surface pressure on the top of the circuit board.
  • the number of attachment domes or spring elements depends on the size of the printed circuit board.
  • the fastening points formed thereby are arranged distributed uniformly over the surface of the circuit board.
  • the spring element has a transverse to the central portion thereof extending web, which cooperates with a recess of the mounting dome to form a Vermostikes. Especially if the spring element is not rotationally symmetrical, this can be set a defined contact pressure.
  • a lighting device for roads has a housing in which a light module for emitting light is arranged.
  • the light module can have one or more light sources (LED light sources or LED chips) which are arranged on a printed circuit board 1.
  • further electronic components can be arranged on the printed circuit board 1.
  • the light source may be associated with an optical element 2, which may be formed for example as a reflector or lens.
  • the printed circuit board 1 is connected in a planar manner to a heat sink 3 or a housing (module housing with good thermal conductivity), which may consist of an aluminum die cast part, for example.
  • the heat sink 3 extends substantially under planar contact with a lower side 4 of the printed circuit board 1.
  • the electronic components, such as the LED light source and the optical parts, are arranged on an opposite upper side 5 of the printed circuit board 1.
  • a spring element 6 made of a permanently stable material, in particular spring steel material, is provided.
  • the spring element 6 is formed wing-shaped and has a central portion 7 with an opening 8 and adjoining the opposite edge sides of the central portion 7 spring arms 9, which protrude at an acute angle ⁇ from the central portion 7.
  • the spring arm 9 a bent foot 10 to bear against the top 5 of the circuit board 1.
  • the spring arms 9 are substantially planar.
  • the foot 10 extends along a line and is thus suitable for line pressing on the upper side 5 of the printed circuit board 1.
  • the spring element 6 cooperates with a fixing dome, which is connected to the heat sink 3 or the housing and projects through a bore 11 of the printed circuit board 1.
  • the fastening dome thus extends out of an extension plane E of the printed circuit board 1, a free end of the fastening dome being arranged at a distance from the printed circuit board 1.
  • the fastening dome is designed as a rivet dome 12, which is integrally connected to the heat sink 3 or the housing.
  • the central portion 7 of the spring element 6 is clamped to a rivet head 13 of the rivet mandrel 12 fixed thereto.
  • a holding part 2 of the further optical element is fastened to the rivet dome 12, wherein the frictional connection only via the Rivet head 13 and the rivet dome 12 and the spring element 6 extends under the recess of the optical part 2.
  • the circuit board 1 is placed on the heat sink 3 (or in the housing) while engaging the rivet dome 12 in the bore 11 of the circuit board 1.
  • the heat sink 3 may for example be fixed or integral with the housing of the light module.
  • the optical part with its holding part 2 having a bore is now placed on the rivet dome 12, which runs conically in the direction of the free end, and the spring element 6 is placed on the rivet dome 12 by placing the central portion 7.
  • the riveting process can take place in one working step to form the rivet head 13, wherein a corresponding contact pressure is exerted on the printed circuit board 1 via the foot 10 of the spring element 6.
  • the spring element 6 is optionally rotated so that the web 15 snaps into the recess 16.
  • the fixing dome is formed as a hollow receiving mandrel 22, which is preferably integrally connected to the heat sink 3 and the housing).
  • the hollow receiving mandrel 22 enables a detachable attachment of the spring element 6 to the heat sink 3.
  • the fastening screw 23 is formed as a self-tapping screw, which cuts an internal thread in the hollow receiving mandrel 22.
  • the hollow receiving mandrel 22, like the rivet dome 12, is dome-shaped in the direction of a free end and has corresponding recesses 16 for receiving the webs 15.
  • a head 24 of the fastening screw 23 lies flat in the assembly position on the central portion 7 of the spring element 6.
  • the additional optical element can additionally be held without the force flow being changed via the spring element 6 and the receiving mandrel 22 or the fastening screw 23.
  • the optical element 2 (reflector) has a first holding part and a second holding part 2 '(reflector base plate) connected thereto.
  • Position dome 25 are shown, which serve to position the reflector plate 2 '.
  • the printed circuit board 1 in the region of the feet 10 of the spring element 6 on a no copper layer having recess 26, so that the feet 10 do not press against a copper layer.
  • the underside 4 of the circuit board 1 is flatly applied to the heat sink 3 and the housing, wherein the hollow receiving mandrel 22 engages in the bore 11 of the circuit board 1.
  • the holding part 2 of the further optical element and the central portion 7 of the spring element 6 is placed on the receiving mandrel 22 frontally.
  • the fastening screw 23 is screwed through the opening 8 of the central portion 7 and the holding part 2 by cutting the internal thread in the receiving mandrel 22 until the desired interference fit of the spring element 6 is achieved with respect to the printed circuit board 1.
  • the fixing dome may also be cylindrical or hollow cylindrical.
  • the spring arms 9 may also be formed arcuate.
  • the spring element 6 may also be formed rotationally symmetrical, wherein the spring arm 9 is conically connected to the central portion 7.
  • the feet 10 may alternatively be formed flat.
  • the printed circuit board 1 can also be fastened to the attachment points via rivet domes 12 and hollow receiving domes 22 with the corresponding spring elements 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (10)

  1. Dispositif d'éclairage pour rues avec un certain nombre de sources lumineuses, avec une carte de circuits (1) dont la face supérieure (5) porte la source lumineuse, et avec un radiateur (3) ou avec un boîtier qui est relié à la carte de circuits (1) sur une face inférieure (4) de celle-ci tournée à l'opposé de la source lumineuse, caractérisé en ce que
    le radiateur (3) ou le boîtier présente un bossage de fixation (12, 22) qui se dresse à travers un perçage (11) de la carte de circuits (1) à partir d'un plan d'extension (E) de celle-ci et en ce qu'est fixé sur le bossage de fixation (12, 22) un élément de ressort (6) qui appuie sur une face supérieure (5) de la carte de circuits (1) avec un bras de ressort (9) dépassant du bossage de fixation (12, 22) en formant un angle (α).
  2. Dispositif d'éclairage selon la revendication 1, caractérisé en ce que l'élément de ressort (6) présente une partie centrale (7) avec une ouverture (8), le bras de ressort (9) se raccordant à la partie centrale (7) en formant un angle (α) aigu.
  3. Dispositif d'éclairage selon la revendication 1 ou 2, caractérisé en ce que le bossage de fixation est conformé comme un bossage riveté (12) qui est relié d'un seul tenant au radiateur (3) ou au boîtier, et en ce qu'une tête de rivet (13) du bossage riveté (12) enserre la partie centrale (7) de l'élément de ressort (6) et/ou retient une partie de maintien (2) d'un autre élément optique.
  4. Dispositif d'éclairage selon l'une des revendications 1 à 3, caractérisé en ce que le bossage de fixation est conformé comme un bossage de réception (22) de forme creuse, qui est relié d'un seul tenant avec le radiateur (3) ou le boîtier, et en ce que la partie centrale (7) de l'élément de ressort (6) est enserrée par une vis de fixation (23) pouvant être insérée dans le bossage de réception (22) de forme creuse vis-à-vis de celui-ci et/ou en ce qu'une partie de maintien (2) d'un autre élément optique est retenue entre une tête (24) de la vis de fixation (23) et une face d'extrémité du bossage de réception (22) de forme creuse.
  5. Dispositif d'éclairage selon la revendication 4, caractérisé en ce que la vis de fixation (23) est conformée comme une vis autotaraudeuse qui taille un filetage intérieur dans le bossage de réception (22) de forme creuse.
  6. Dispositif d'éclairage selon l'une des revendications 1 à 5, caractérisé en ce que l'élément de ressort (6) est formé d'un seul tenant et à partir d'un matériau durablement stable.
  7. Dispositif d'éclairage selon l'une des revendications 1 à 6, caractérisé en ce que le bras de ressort (9) de l'élément de ressort (6) présente à une extrémité libre un pied coudé (10) au moyen duquel l'élément de ressort (6) appuie sur la face supérieure de la carte de circuits (1) en exerçant une pression linéaire ou une pression de surface.
  8. Dispositif d'éclairage selon l'une des revendications 1 à 7, caractérisé en ce que l'élément de ressort (6) présente une barrette (15) disposée transversalement par rapport à sa partie centrale (7), qui coopère avec un évidement (16) extérieur du bossage de fixation (12, 22) pour former une sécurité contre la rotation.
  9. Dispositif d'éclairage selon l'une des revendications 1 à 8, caractérisé en ce que le bossage de fixation (12, 22) est en forme de cône ou de cylindre à son extrémité libre.
  10. Dispositif d'éclairage selon l'une des revendications 1 à 9, caractérisé en ce que la carte de circuits (1) présente au niveau du pied (10) une découpe (26) dans la surface du cuivre.
EP11743501.6A 2010-08-04 2011-08-03 Dispositif d'éclairage pour routes Not-in-force EP2601438B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11743501T PL2601438T3 (pl) 2010-08-04 2011-08-03 Urządzenie oświetleniowe dla ulic

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010033298A DE102010033298A1 (de) 2010-08-04 2010-08-04 Beleuchtungsvorrichtung für Straßen
PCT/EP2011/063352 WO2012016999A2 (fr) 2010-08-04 2011-08-03 Dispositif d'éclairage pour routes

Publications (2)

Publication Number Publication Date
EP2601438A2 EP2601438A2 (fr) 2013-06-12
EP2601438B1 true EP2601438B1 (fr) 2014-07-09

Family

ID=44630206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11743501.6A Not-in-force EP2601438B1 (fr) 2010-08-04 2011-08-03 Dispositif d'éclairage pour routes

Country Status (5)

Country Link
EP (1) EP2601438B1 (fr)
DE (1) DE102010033298A1 (fr)
ES (1) ES2501769T3 (fr)
PL (1) PL2601438T3 (fr)
WO (1) WO2012016999A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100281A1 (de) 2013-01-11 2014-07-17 Siteco Beleuchtungstechnik Gmbh Leuchtenkörper
BR112015024493A2 (pt) * 2013-10-28 2017-08-22 Koninklijke Philips Nv Disposição de iluminação

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6517218B2 (en) * 2000-03-31 2003-02-11 Relume Corporation LED integrated heat sink
US20010055198A1 (en) * 2000-06-24 2001-12-27 Samsung Electro-Mechanics Co., Ltd. Heat sink
DE102004001124B3 (de) * 2004-01-07 2005-10-06 Goodrich Hella Aerospace Lighting Systems Gmbh Leuchte, insbesondere Warnleuchte, für ein Fahrzeug
DE102007050893B4 (de) * 2007-10-24 2011-06-01 Continental Automotive Gmbh Verfahren zum Positionieren und Montieren einer LED-Baueinheit sowie Positionierkörper hierfür
US8220980B2 (en) * 2008-09-23 2012-07-17 Tyco Electronics Corporation Socket assembly for light-emitting devices
US8256927B2 (en) * 2009-09-14 2012-09-04 Leotek Electronics Corporation Illumination device

Also Published As

Publication number Publication date
PL2601438T3 (pl) 2015-01-30
EP2601438A2 (fr) 2013-06-12
ES2501769T3 (es) 2014-10-02
DE102010033298A1 (de) 2012-02-09
WO2012016999A3 (fr) 2012-04-19
WO2012016999A2 (fr) 2012-02-09

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