EP3320260A1 - Luminaires avec classement ip - Google Patents

Luminaires avec classement ip

Info

Publication number
EP3320260A1
EP3320260A1 EP16739580.5A EP16739580A EP3320260A1 EP 3320260 A1 EP3320260 A1 EP 3320260A1 EP 16739580 A EP16739580 A EP 16739580A EP 3320260 A1 EP3320260 A1 EP 3320260A1
Authority
EP
European Patent Office
Prior art keywords
region
rated
lens
luminaire
light
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
Application number
EP16739580.5A
Other languages
German (de)
English (en)
Other versions
EP3320260B1 (fr
Inventor
Hui Mao
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.)
Aurora Ltd
Original Assignee
Aurora 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 Aurora Ltd filed Critical Aurora Ltd
Publication of EP3320260A1 publication Critical patent/EP3320260A1/fr
Application granted granted Critical
Publication of EP3320260B1 publication Critical patent/EP3320260B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • 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
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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
    • F21V21/02—Wall, ceiling, or floor bases; Fixing pendants or arms to the bases
    • F21V21/04—Recessed bases
    • F21V21/041—Mounting arrangements specially adapted for false ceiling panels or partition walls made of plates
    • F21V21/042—Mounting arrangements specially adapted for false ceiling panels or partition walls made of plates using clamping means, e.g. for clamping with panel or wall
    • F21V21/044—Mounting arrangements specially adapted for false ceiling panels or partition walls made of plates using clamping means, e.g. for clamping with panel or wall with elastically deformable elements, e.g. spring tongues
    • F21V21/046—Mounting arrangements specially adapted for false ceiling panels or partition walls made of plates using clamping means, e.g. for clamping with panel or wall with elastically deformable elements, e.g. spring tongues being tensioned by rotation of parts

Definitions

  • the present invention relates to IP (Ingress Protection) rated light fittings and luminaires. It is particularly applicable, but in no way limited, to light fittings with a lens across the front of the fitting, such as downlights.
  • IP Ingress Protection
  • IP Codes or International Protection Marking is set out in I EC Standard 60529, as published by the International Electrotechnical Commission (IEC).
  • IEC International Electrotechnical Commission
  • a downlight for use in a shower room might require a rating of IP 65.
  • An illustration, by way of example only, of some rating figures for IP Rated Enclosures using this current system are shown in the listings below: -
  • a number replaced by x indicates that the enclosure is not rated for that specification.
  • IP 65 rating a waterproof or water resistant barrier must be created around that part of the luminaire which might be exposed to water. It is relatively straightforward to make a fixed downlight IP rated, for example by forming a watertight seal between the lens and the bezel, or by incorporating a waterproof cover over the downlight either over or beneath the bezel, thus creating an effective waterproof seal.
  • IP rated for example by forming a watertight seal between the lens and the bezel, or by incorporating a waterproof cover over the downlight either over or beneath the bezel, thus creating an effective waterproof seal.
  • an adjustable downlight where the lamp and/or lens is pivotally mounted so as to move out of the plane of the front of the downlight in order to direct the light at an angle, a good IP rating is more difficult to achieve.
  • creating the required IP rating generally involves the use of an additional component, in addition to the conventional light focussing lens which is used to focus the light from the light source. This inevitably entails additional cost as well as an additional step in the manufacturing process.
  • an IP rated lens for a luminaire, said luminaire including a light source adapted to emit light from the front of the luminaire, said lens comprising:- (i) a first region through which light from the light source is emitted;
  • This new type of lens may be sealed to or incorporated into a wide range of luminaires, especially downlights.
  • the term 'lens' has a very broad meaning and refers to any light transmissive optical device. Therefore the term 'lens' includes, but is not limited to, a substantially planar light transmissive plane or sheet of material where the opposing sides of the plane are substantially parallel to each other, as well as optical lenses that affect the focus of a light beam through refraction.
  • the planar light transmissive sheet serves to allow the light emitted from the light source and associated lens in the luminaire to pass through the IP rated lens without significant deviation.
  • the second region is integral with the first region.
  • the whole lens is naturally watertight.
  • the second region preferably substantially surrounds the first region and thus takes the form of a flexible flange around a light focussing or light transmitting central lens region.
  • the first region and the second region are formed from the same material.
  • first region and the second region are formed from different materials. This enables the light emitting region to be formed from highly light transparent material whereas the second region may be formed from a material that is less transparent to visible light but is still highly flexible, if that is advantageous.
  • first region and the second region are bonded together.
  • the two regions are formed from plastics materials, as selected by the materials specialist, and there are a wide number of known ways of bonding plastics together.
  • first region and second region are formed by an injection moulding process and preferably by a multi-shot injection moulding process.
  • the second region includes an engagement means adapted to enable the lens to attach to the front of the luminaire in order to achieve the required IP rating.
  • This engagement means can take a wide variety of forms, such as an elastically deformable channel that fits over part of the luminaire
  • the first portion comprises an optical lens, being a lens capable of focussing light, and preferably the optical lens is adapted to focus light from the light source into a light cone having an angle between 15 degrees and 60 degrees about a central axis of the luminaire.
  • the optical lens comprises a substantially conical body formed from a transparent or translucent material, said conical body having a first, narrow end and a second wider end and an outer surface designed to substantially totally reflect light towards the second end of the cone, said conical body having a primary axis extending from the first end to the second end, wherein the outer surface of the conical body comprises a plurality of reflecting facets or reflecting surfaces.
  • the second region comprises one or more corrugations. These corrugations act like flexible bellows, allowing for the angular adjustment in an adjustable luminaire.
  • the IP rated lens is adapted to comprise a primary lens in the luminaire.
  • the perimeter of the IP rated lens is adapted to be covered by a bezel, and optionally held in place by the bezel. This arrangement is particularly applicable to downlights.
  • an IP rated lens or lens cover according to the present invention comprises a first region adapted to transmit light from a light source in a luminaire and a second flexible, resiliently deformable region that is adapted to flex sufficiently to accommodate the movement of an adjustable light source whilst retaining the desired IP rating, such as the movement of an adjustable downlight.
  • the first and second regions may be made of the same or different materials.
  • the first region comprises an optical lens capable of focussing light from a light source.
  • the IP rated lens may replace the conventional lens used to focus light from an LED module.
  • the invention extends to include a luminaire incorporating an IP rated lens according to the present invention, especially downlights.
  • Figure 1 shows a perspective view of an IP rated lens from below, being the side that engages with the luminaire;
  • Figure 2 shows a perspective cross section through the lens of Figure 1 ;
  • Figure 3 shows a perspective view from below of the lens in Figures 1 & 2;
  • Figure 4 shows how a portion of an IP rated lens according to the present invention can flex out of the general plane of the lens to accommodate an adjustable luminaire such as a downlight;
  • Figure 5 shows how an IP rated lens as shown in Figure 1 would engage with the front of a downlight
  • Figures 6 and 7 show perspective and perspective cross section views respectively of an IP rated lens where the centre of the lens comprises an optical lens capable of focussing light from an LED module;
  • Figure 8 shows how an IP rated lens as shown in Figures 6 & 7 can flex out of the general plane of the lens to accommodate an adjustable luminaire such as a downlight;
  • Figure 9 shows an IP rated lens as shown in Figure 6 on the front of a downlight
  • Figure 10 shows in exploded format a downlight, an IP rated lens and a front bezel.
  • Figures 1 to 4 show various views of an IP rated lens or lens cover designed to attach to the front of a downlight.
  • a lens 10 having a central region or first region 11 which in this example is substantially planar and is substantially optically transparent to visible light. This lens does not necessarily have the ability to focus light.
  • Light from a light source in a luminaire, which is typically an LED light source, is emitted through this central region 1 1.
  • a corrugated or second region 12, 13, 14 which is formed from a flexible, resiliently deformable material.
  • This corrugated or pleated region acts like bellows to allow articulation of the central lens region such that the light source in the luminaire behind the lens can be directed at an angle to the general plane of the front of the luminaire.
  • An example of this type of luminaire is an adjustable downlight. It is preferred that this pleated or corrugated region 12, 13, 14 and the perimeter region 15 are formed from the same flexible, resiliently deformable material, and more preferably are formed as one component.
  • the corrugated region when viewed as a perspective cross section through the lens as shown in Figure 2, takes the form of a depression, groove or channel 13 attached to a ridge 12, which in turn is attached to a second depression, groove or channel 14.
  • This region is preferably formed from a thin, flexible, resiliently deformable material such as a thermoplastic elastomer (TPE).
  • TPE thermoplastic elastomer
  • These materials include silicone polymers, which are particularly suitable for this application, flexible polystyrene, flexible PCC, flexible PMMA and other flexible acrylic plastic materials These plastic materials are included by way of example only, and serve to illustrate the very wide choice of materials already available to the materials expert.
  • the central lens portion or region can be tilted in any desired direction as necessary. It will also be appreciated that while this example shows a substantially circular I P rated lens or lens cover, this lens cover could be any desired shape such as square, rectangular, hexagonal or polygonal, and the same principles of construction would apply.
  • the second region substantially surrounds the first region, allowing movement out of the plane in any desired direction.
  • Figure 5 shows how such an IP rated lens 10 can be placed over the front of a downlight 20.
  • the downlight has its own optical lens 21 which serves to focus the light from one or more LED modules.
  • the downlight 20 has a body 26 with an outwardly extending flange 25 around the front perimeter and this flange would normally be concealed from view by a bezel.
  • a lens or lens cover 10 is stretched over and around the flange 25, such that the flange 25 sits substantially inside the channel 16. The fit of the flange 25 inside channel 16 is tight enough to form a watertight seal to IP 65 standard.
  • the outer part of lens 10 may be concealed by a decorative bezel (not shown) if required.
  • the term 'lens cover 1 is an appropriate term to describe item 10, in that it is designed to cover an existing optical lens in a downlight and to transmit any light emitted by the LED light source/optical lens combination.
  • the central region 31 comprises an optical lens.
  • This optical lens has a substantially frustoconical body whose outer surface incorporates a plurality of densely distributed facets.
  • Such solid lenses which operated by total internal reflection of light are known and are described, for example, in WO 2014/108575 (Aurora Limited) and WO 2014/108662 (Aurora Limited) the entire contents of which are hereby incorporated by reference.
  • the centre of the light emitting face of lens region 38 is slightly dished or concave and the central region also incorporates a plurality of convex shaped dimples or pimples. These serve to scatter any light that would otherwise be emitted directly from an LED module located in a blind hole 39 on the rear face of the lens and adapted to accommodate an LED light engine.
  • the corrugated or second region has three corrugations 32, 33 and 34. These serve to provide a great deal of flexibility such that the combination of a light source and lens 30 when installed in an adjustable down light can move significantly out of the plane of the front of the downlight without affecting the IP rating.
  • An example of this angular movement is shown in Figure 8.
  • Figure 9 shows an IP rated lens of the type shown in Figures 6 and 7 attached to the front of a downlight 40.
  • a further example of a lens of this type used in combination with a downlight is shown in Figure 10.
  • downlight 50 has a body 56 and an outwardly extending flange 55 around the front perimeter of the downlight body.
  • the lens 30 is secured or bonded to the perimeter flange 55 in a watertight fashion such as by way of an adhesive.
  • the perimeter edge of the lens 30 may be covered by a bezel 60 as shown in Figure 10. If required the outer circumference of the lens 30 can incorporate an endless channel or groove similar to item 16 in the earlier example. The flange 55 would then sit in this channel.
  • An IP rated lens according to the present invention may be manufactured by any suitable process such as injection moulding, especially 2 shot or multiple shot injection moulding. This allows the first, central region to be manufactured from any type of plastics material which is optically very clear but not necessarily flexible, and the rest of the lens to be manufactured from a different more flexible plastics material. Depending on the materials of manufacture, a third plastic material may be required in order for the central region to adhere firmly to flexible outer region.
  • the first and second regions of the IP rated lens can be manufactured separately in two parts and these two parts welded, bonded or glued together, such that the two parts become integral.
  • a wide variety of methods are already known to the materials specials whereby two plastic components can be bonded together including, but not limited to, ultrasonic welding.
  • first and second regions may be manufactured from the same, optically substantially clear but flexibly deformable material by, for example, a one-shot injection moulding process.
  • suitable materials will be selected by the materials specialist and such materials include highly transparent silicone polymers.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

La présente invention concerne un verre (10) avec classement IP destiné à un luminaire, ledit luminaire comprenant une source lumineuse prévu pour émettre de la lumière par l'avant du luminaire, ledit verre comportant:- (i) une première région (11) à travers laquelle la lumière provenant de la source lumineuse est émise; (ii) une deuxième région (12, 13, 14) qui est élastiquement déformable, permettant ainsi à la source lumineuse dans le luminaire de se déplacer par rapport au plan de l'avant du luminaire, tout en conservant une protection IP lorsque la source lumineuse se trouve en dehors du plan normal. Les première (11) et deuxième régions (12, 13, 14) peuvent être constituées du même matériau ou de matériaux différents. Dans un mode de réalisation préféré, la première région comporte un verre optique (10) capable de focaliser la lumière provenant d'une source lumineuse. Dans ce mode de réalisation, le verre avec classement IP peut remplacer le verre conventionnel utilisé pour focaliser la lumière provenant d'un module à DEL.
EP16739580.5A 2015-07-09 2016-07-08 Luminaires avec classement ip Active EP3320260B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1512014.0A GB201512014D0 (en) 2015-07-09 2015-07-09 IP rated luminaires
PCT/IB2016/054108 WO2017006289A1 (fr) 2015-07-09 2016-07-08 Luminaires avec classement ip

Publications (2)

Publication Number Publication Date
EP3320260A1 true EP3320260A1 (fr) 2018-05-16
EP3320260B1 EP3320260B1 (fr) 2020-09-23

Family

ID=54013702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16739580.5A Active EP3320260B1 (fr) 2015-07-09 2016-07-08 Luminaires avec classement ip

Country Status (5)

Country Link
EP (1) EP3320260B1 (fr)
CN (1) CN108027133B (fr)
AU (1) AU2016290994B2 (fr)
GB (2) GB201512014D0 (fr)
WO (1) WO2017006289A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700022297A1 (it) * 2017-02-28 2018-08-28 Reggiani Illuminazione Dispositivo di illuminazione di tipo direzionabile.
GB2570174B (en) * 2018-07-10 2020-02-05 Collingwood Lighting Ltd Lighting unit
CN209371152U (zh) * 2019-03-29 2019-09-10 欧普照明股份有限公司 光学元件及配光模组
EP4239243A4 (fr) * 2020-12-28 2024-05-01 Opple Lighting Co., Ltd. Ensemble de diffusion de lumière et appareil d'éclairage

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2769680Y (zh) * 2004-12-09 2006-04-05 姜建国 具有密封散热装置和带聚光透镜的固体半导体照明模组
DE102008005697A1 (de) * 2008-01-23 2009-07-30 Zumtobel Lighting Gmbh LED-Leuchte mit Kühlflüssigkeit
CN201170469Y (zh) * 2008-03-19 2008-12-24 吴育林 便于调节照射角度的天花装饰灯以及壁灯
GB2473185B (en) * 2009-08-28 2012-05-30 Ocean Led Ltd Luminaire
KR101030999B1 (ko) * 2010-10-11 2011-04-25 (주)흥화전자 광 방사각 조절이 가능한 투광기
CN103162242B (zh) * 2011-12-08 2017-05-10 欧司朗股份有限公司 照射角度调节装置和照明装置
WO2014172684A1 (fr) * 2013-04-18 2014-10-23 Zylight, Llc Instrument d'éclairage de fresnel à led
CN203249165U (zh) * 2013-04-19 2013-10-23 深圳市旭晟实业有限公司 一种具有30度曲面的红外线led透镜
SG11201509660QA (en) * 2013-05-29 2015-12-30 Brightgreen Pty Ltd Adjustable-angle luminaires
CN203880488U (zh) * 2014-05-26 2014-10-15 佛山市国星光电股份有限公司 一种新型防水灯条结构

Also Published As

Publication number Publication date
EP3320260B1 (fr) 2020-09-23
WO2017006289A1 (fr) 2017-01-12
GB201611902D0 (en) 2016-08-24
CN108027133A (zh) 2018-05-11
AU2016290994A1 (en) 2018-02-08
AU2016290994B2 (en) 2018-10-04
GB201512014D0 (en) 2015-08-19
GB2540277A (en) 2017-01-11
CN108027133B (zh) 2020-09-29
GB2540277B (en) 2020-03-18

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