EP3036477A1 - Luminaire - Google Patents

Luminaire

Info

Publication number
EP3036477A1
EP3036477A1 EP14753283.2A EP14753283A EP3036477A1 EP 3036477 A1 EP3036477 A1 EP 3036477A1 EP 14753283 A EP14753283 A EP 14753283A EP 3036477 A1 EP3036477 A1 EP 3036477A1
Authority
EP
European Patent Office
Prior art keywords
inner support
outer housing
light fitting
fitting according
lighting device
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Withdrawn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
EP14753283.2A
Other languages
German (de)
English (en)
Inventor
Daniel HISCOKE
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.)
Scolmore International Ltd
Original Assignee
Scolmore International Ltd
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 Scolmore International Ltd filed Critical Scolmore International Ltd
Publication of EP3036477A1 publication Critical patent/EP3036477A1/fr
Withdrawn legal-status Critical Current

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
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • 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
    • 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
    • F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
    • 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
    • F21V25/12—Flameproof or explosion-proof arrangements
    • F21V25/125—Flameproof or explosion-proof arrangements using intumescent material, i.e. using materials which swells up as a result of heat exposure
    • 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
    • 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

  • This invention relates to a light fitting and in particular, though not exclusively, to a light fitting of the type in which a solid-state device is employed to provide a source of light.
  • the light fitting may be of the so-called adjustable type which allows the direction of emitted light to be adjusted.
  • the invention relates also, though not exclusively, to a light fitting which may be of the so-called fire resistant type, being resistant to heat and/or fire, and/or which is suitable for installing in an aperture in a partition panel such as that of a ceiling or wall.
  • the lighting device and heat sink typically are mounted on and supported by an inner support housing which is pivotally mounted relative to an outer housing, such as a fire resistant outer housing.
  • the inner housing is provided with one or more apertures aligned with one or more light emitting devices such that light from the or each solid- state lighting device at a rear side of the support housing travels outwards through a respective aperture.
  • An example of a fire resistant adjustable lighting unit of the kind incorporating an assembly of a solid-state lighting device and heat sink is described in more detail in the specification of our copending UK patent application No. GB 1302348.6.
  • the present invention seeks to provide an improved light fitting which facilitates a reduction of manufacturing costs without any significant reduction in overall performance.
  • a light fitting comprising an outer housing and an inner support which is supported by the outer housing, said inner support comprising a rear face and a front face to which a solid-state lighting device is secured in good thermal contact therewith, and said rear face of the inner support being devoid of an attached heat sink.
  • a light fitting comprising an outer housing and an inner support which is supported within the outer housing, said outer housing comprising a closed end and an open end, said inner support comprising a rear face and a front face to which a solid state lighting device is secured in good thermal contact therewith whereby the inner support serves as a heat sink and wherein the rear face of the inner support is spaced from the closed end of the outer housing whereby a void is defined therebetween.
  • the light fitting may be of a fire rated type and may be provided with an outer housing of fire resistant material.
  • the light fitting may be of a fire rated type and may be provided with an outer housing of fire resistant material.
  • the present invention teaches provision of that heat sink at the side of the fire resistant material which in use is exposed to occurrence of a fire in the space for which the light fitting provides illumination.
  • Said heat sink may be substantially the sole means for dissipation of heat generated in use by the solid-sate lighting device or it may be a primary heat sink with additional heat dissipation being provided by other components of the light fitting.
  • the rear face of the inner support lies substantially midway between the open and closed ends of the outer housing, or closer to the open end than to the closed end.
  • a light fitting comprising an outer housing for locating relative to a support structure such as an apertured partition and an inner support for supporting a solid-state lighting device wherein the inner support comprises a rear face and a front face, said front face facing in the general direction in which emitted light travels from the light fitting, said inner support being secured to the outer housing for at least one of pivotal and rotational movement relative to the outer housing and said solid-state lighting device being secured to said front face in thermal contact with the inner support.
  • the material of the inner support has a greater thickness than the material of the outer housing.
  • a light fitting comprising an outer housing for locating relative to a support structure such as an apertured partition and an inner support for supporting a solid-state lighting device, wherein the inner support comprises a rear face and a front face, said front face facing in the general direction in which emitted light travels from the light fitting, said inner support comprising material of a greater thickness than the material of the outer housing and said solid-state lighting device being secured to said front face of the inner support in thermal contact therewith. That is, the spacing of said front and rear faces of the inner support preferably is greater than the wall thickness of the outer housing, preferably more than twice and more preferably at least three times said wall thickness.
  • the inner support of the present invention preferably comprises an excess of material whereby it is of a relatively robust
  • An inner support having one or more of the inner support features described herein may be employed in the construction of either a fixed type and an adjustable type of light fitting.
  • the inner support may be a casting, moulding or pressing or be of a
  • the inner support is formed from aluminium and more preferably is a casting of aluminium although sheet material and other metals such as steel may be employed.
  • the solid-state lighting device of a light fitting in accordance with the present invention is secured to said front face in direct thermal contact therewith.
  • the inner support is in good thermal contact with the outer housing whereby heat from the solid-state lighting device is conducted to the outer housing such that the outer housing assists the inner support to function as a heat sink.
  • pivotal or rotational movement of the inner support relative to the outer housing about an axis of pivotal movement or rotation preferably results in relative sliding movement of contacting surfaces which maintain axial alignment of the inner support and outer housing and also surfaces which resist relative movement of the inner support and outer housing in the direction of the length of said axis.
  • the contact between said confronting surfaces thereby assists in transfer of thermal energy from the inner support to the outer housing such that the outer housing is able effectively to serve at least in part as the heat sink.
  • the means for location of the inner support relative to the outer housing may comprise the combination of confronting, contacting surfaces which are of a cylindrical shape and confronting, contacting surfaces which are substantially planar, such as of an annular shape.
  • the area of the contacting planar surfaces may be greater than that of the contacting cylindrical surfaces, and preferably is at least twice the area of the contacting cylindrical surfaces.
  • the location of the inner support relative to the outer housing may comprise part-spherical surfaces, frusto conical surfaces, or a combination of part-spherical surfaces and/or frusto conical and one or more of cylindrical and planar surfaces.
  • At least one and more preferably each of a pair of contacting surfaces is formed from aluminium.
  • the outer housing may be of a substantially tubular shape which is open at one end to facilitate insertion of the inner support and associated solid-state lighting device.
  • the outer housing may be of a tubular shape which has a major, longitudinal axis parallel with the length of the housing.
  • the inner support may be pivotally mounted about an axis which is substantially perpendicular to said longitudinal axis. Additionally or alternatively the inner support may be mounted for rotational movement about said longitudinal axis of the outer housing.
  • the inner support may be secured to the outer housing by pivot means which comprises two pivot devices located or acting at diametrically opposite positions of a circular section outer housing.
  • the pivot means may comprise a pivot device which extends through an element of fire resistant intumescent material.
  • the outer housing may be of a fire resistant type, such as a steel housing.
  • Figure 1 is a perspective view of a light fitting in accordance with a first embodiment of the present invention
  • Figure 2 is an exploded perspective view of the light fitting of Figure 1 ;
  • Figure 3 is a longitudinal sectional view of the light fitting of Figures 1 and 2 in the plane 3-3 of Figure 2, and
  • Figure 4 is a perspective view of a light fitting in accordance with a second embodiment of the present invention.
  • a swivel type LED light fitting 10 for inserting into a plasterboard ceiling or wall comprises an outer housing 11 of fire resistant material which provides support for an inner support 12 to which a solid-state lighting device 13 is secured.
  • the outer housing 11 comprises a generally cylindrically shaped central body region 14 which is open at one end region 15 and relatively closed at the other end region 16.
  • the open end in known manner, is formed integrally with an outwardly extending flange 17.
  • a pair of spring-loaded retention arms 38 extend from the body 14 whereby, in use, the arms bear against the normally hidden side of the plasterboard (not shown) and hold the flange firmly against the other, visible side of the board with a moisture seal 19 held captive between the flange and plasterboard.
  • the arms 38 are attached to spring mounts 20 which in turn are attached to the outer surface of the central body region 14 of the outer housing.
  • a band of intumescent material 18 extends around that region of the central body 14 adjacent the flange 17 so as to align with the aperture formed in the plasterboard for accommodating the light unit and thereby effect a fire barrier between the light unit and ceiling void.
  • the flange 17 also provides support for a decorative bezel 22 and a bezel seal 23 which is interposed between the bezel and flange 17.
  • the outer surface of the closed end region 16 of the outer housing 11 provides support for a driver casing 24 which contains, in known manner a driver PCB 39.
  • the inner support 12 has a rear face 30 which faces towards the closed end region 16 of the outer housing, and a front face 31 which faces outwards in a direction towards the open end region 15 of the outer housing.
  • the inner support 12 is an aluminium casting of generally circular shape but provided, at two diametrically opposite positions, with pivot supports 25 that provide bearing surfaces 26 for confronting the inward facing surfaces of central regions 27 of the inner housing.
  • the supports 25 extend from the rear face 30 in a direction towards the closed end 16 of the outer housing.
  • a cylindrically shaped skirting wall 37 extends from the periphery of the front face 31 in a direction towards the open end region 15 of the outer housing.
  • Each pivot support 25 is provided with a necked recess 36 to locate a pivot pin 28 which extends in an inwards direction from the outer housing central region 27 whereby the support member is pivotally mounted relative to the outer housing for pivotal movement about an axis substantially perpendicular to the major axis of the cylindrically shaped central body 14 of the outer housing 11.
  • necked recesses 36 being narrower at the mouth of each recess than inwards of the recess, allows the inner housing readily to be snap fitted to the pivot pins 28.
  • the outer housing is formed from pressed sheet steel, or from aluminium, and in this embodiment of the invention the aluminium casting of the inner support has a thickness of three times the wall thickness of the outer housing.
  • the aforementioned lighting unit 3 is secured directly to the front face 31 of the inner support 30 in good thermal contact therewith.
  • the lighting unit 13 comprises an LED array which is sandwiched between the inner support 12 and a PCB shield 32 which is formed with apertures aligned with the LEDs of the lighting unit 13.
  • a Perspex lens 34 extends over the PCB shield 32 and is secured in position relative to the inner support for pivotal movement therewith.
  • Heat generated by the lighting unit 3 is conducted directly to the inner support 2 which acts as a heat sink. Furthermore, the confronting, contacting surfaces of the inner support flanges 25 and the regions 27 of the outer housing, in addition to the confronting surfaces of the cylindrical pivot pins 28 and receiving apertures in the housing region 27 facilitate effective conduction of thermal energy into the outer housing which thereby also provides a heat sink function and dissipation of heat.
  • the rear face 30 of the inner support 12 is devoid of the conventionally attached heat sink.
  • the overall height of the light fitting, as considered in the longitudinal direction of the casing 11 is less than that of conventional swivel type light fittings in addition to eliminating the cost and weight of the conventionally provided separate heat sink.
  • the first embodiment has been described in relation to a swivel type light fitting, the general form of the construction may be employed, with only minor modification, for the provision of a fixed type light fitting.
  • a fixed type light fitting for example, by providing square section pins and square section openings to receive the pins there may be provided a light fitting of a fixed type.
  • a light fitting 40 is constructed substantially as in respect of the first embodiment but has a bezel of a different design.
  • the light fitting comprises a bezel 41 which extends radially inwards to have an inner edge 42 of a diameter less than the outer diameter of the aforedescribed inner support 12.
  • the bezel inhibits pivotal movement of the inner support thereby providing a light fitting of a fixed type.
  • the present invention facilitates the economic provision of both swivel and fixed type light fittings, or conversion therebetween, by the simple expedient of appropriately selecting the size of the bezel.

Landscapes

  • 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)

Abstract

La présente invention concerne un luminaire (10) qui comprend un logement extérieur (11) et un support intérieur (12) qui est supporté par le logement extérieur, ledit support intérieur comprenant une face arrière (30) et une face avant (31) à laquelle un dispositif d'éclairage à semi-conducteur (13) est fixé en bon contact thermique avec celle-ci, la face arrière du support intérieur étant dépourvue de dissipateur thermique fixé et le support intérieur servant, durant l'utilisation, de dissipateur thermique primaire pour la dissipation de chaleur générée par le dispositif d'éclairage à semi-conducteur. Le luminaire peut comprendre un matériau intumescent ignifuge pour former une barrière ignifuge.
EP14753283.2A 2013-08-01 2014-07-29 Luminaire Withdrawn EP3036477A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1313819.3A GB201313819D0 (en) 2013-08-01 2013-08-01 Light Fitting
PCT/GB2014/000306 WO2015015145A1 (fr) 2013-08-01 2014-07-29 Luminaire

Publications (1)

Publication Number Publication Date
EP3036477A1 true EP3036477A1 (fr) 2016-06-29

Family

ID=49224026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14753283.2A Withdrawn EP3036477A1 (fr) 2013-08-01 2014-07-29 Luminaire

Country Status (5)

Country Link
EP (1) EP3036477A1 (fr)
CN (1) CN204268403U (fr)
AU (1) AU2014298256A1 (fr)
GB (1) GB201313819D0 (fr)
WO (1) WO2015015145A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2539167A (en) * 2015-03-13 2016-12-14 Ac/Dc Led Ltd Luminaires
DE102016116363A1 (de) * 2016-09-01 2018-03-01 Abb Ag Installationsgerät für die Deckenmontage
EP3969803B1 (fr) * 2019-05-17 2024-03-20 Signify Holding B.V. Appareil d'éclairage au sol et sous-ensembles d'un tel appareil

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3977004B2 (ja) * 2000-10-13 2007-09-19 株式会社小糸製作所 室内照明灯
GB0510494D0 (en) * 2005-05-23 2005-06-29 Aurora Ltd Improvements to fire related downlights
CN200958737Y (zh) * 2006-09-22 2007-10-10 武良举 筒形防火灯具
US9605828B2 (en) * 2006-11-14 2017-03-28 Cree, Inc. Light engine assemblies
ITMI20070120A1 (it) * 2007-01-26 2008-07-27 Piper Lux S R L Faretto a led
CA2702521C (fr) * 2007-10-24 2013-03-26 Lsi Industries, Inc. Appareil d'eclairage ajustable
CN201190976Y (zh) * 2008-03-31 2009-02-04 强茂股份有限公司 兼具热对流及热传导的发光二极管灯具及其散热模组
JP5332770B2 (ja) * 2008-04-18 2013-11-06 東芝ライテック株式会社 照明器具
US8152334B2 (en) * 2008-09-08 2012-04-10 Lsi Industries, Inc. LED lighting assembly with adjustment means
WO2010055070A2 (fr) * 2008-11-12 2010-05-20 Osram Opto Semiconductors Gmbh Module opto-électronique et dispositif de refroidissement comprenant un module opto-électronique
CN102384370A (zh) * 2010-08-30 2012-03-21 奥斯兰姆有限公司 用于发光二极管光源设备的旋转散热器结构
US9752739B2 (en) * 2011-08-29 2017-09-05 Hubbell Incorporated Emergency lighting assembly having heat conducting member

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2015015145A1 *

Also Published As

Publication number Publication date
AU2014298256A1 (en) 2016-03-24
CN204268403U (zh) 2015-04-15
GB201313819D0 (en) 2013-09-18
WO2015015145A1 (fr) 2015-02-05

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