EP2951502B1 - Beleuchtungskörper-stützanordnung - Google Patents

Beleuchtungskörper-stützanordnung Download PDF

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Publication number
EP2951502B1
EP2951502B1 EP14746658.5A EP14746658A EP2951502B1 EP 2951502 B1 EP2951502 B1 EP 2951502B1 EP 14746658 A EP14746658 A EP 14746658A EP 2951502 B1 EP2951502 B1 EP 2951502B1
Authority
EP
European Patent Office
Prior art keywords
fixture
fulcrum
light fixture
support member
led
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.)
Active
Application number
EP14746658.5A
Other languages
English (en)
French (fr)
Other versions
EP2951502A4 (de
EP2951502A1 (de
Inventor
Brian Kinnune
Nathan Snell
Jeremy Sorenson
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.)
Cree Lighting USA LLC
Original Assignee
Ideal Industries Lighting LLC
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
Priority claimed from US13/764,749 external-priority patent/US9435519B2/en
Application filed by Ideal Industries Lighting LLC filed Critical Ideal Industries Lighting LLC
Publication of EP2951502A1 publication Critical patent/EP2951502A1/de
Publication of EP2951502A4 publication Critical patent/EP2951502A4/de
Application granted granted Critical
Publication of EP2951502B1 publication Critical patent/EP2951502B1/de
Active 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/16—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using sheets without apertures, e.g. fixed
    • 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
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
    • 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
    • F21V21/10—Pendants, arms, or standards; Fixing lighting devices to pendants, arms, or standards
    • F21V21/116—Fixing lighting devices to arms or standards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-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
    • F21V5/00—Refractors for light sources
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • 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 light fixtures and, more particularly, to light fixtures using light-emitting diodes (LEDs).
  • LEDs light-emitting diodes
  • LEDs light-emitting diodes
  • HID high- intensity discharge
  • Light fixtures are needed in many different outdoor settings, and for area lighting a high above-ground position often allows the most efficient use of light.
  • light fixtures typically increase in size and weight and may be difficult to handle and install, especially at high elevations.
  • Fixture-supporting structures such as tenons or pipes may not be at a perfect desired angle, and therefore fixtures have to be adjusted during installation to assure the desired fixture orientation.
  • US 2010/073939 A1 discloses a light fixture which is secured to an arm member for support.
  • a reward side of the light fixture includes a mounting pole opening, and the arm member extends through the mounting pole opening.
  • a stepped structure is formed such that the end of the arm member can be arranged at different steps and thus fixated by a clamping bracket at different angles with respect to the light fixture.
  • the mounting pole opening extends from the interior of the light fixture to the outside of the light fixture.
  • Luminaires may have shapes and designs which limit space to accommodate structures for mounting purposes.
  • a simple mounting assembly which is unobtrusive, does not interrupt luminaire aesthetics, permits easy installation and easy orientation adjustment would be desired.
  • Roadway, parking lot and similar light fixtures are typically mounted in a generally horizontal orientation, adjusted to a particular angular orientation of choice with respect to horizontal. It is desirable to minimize the horizontal dimension of the fixture in order to decrease overall fixture size and weight, and to do so in a structure providing ease of installation and ease of adjustment upon installation.
  • LED light fixture which satisfies the above- mentioned adjustable mounting requirements and which is also relatively simple and inexpensive to manufacture, while still satisfying other important requirements for light fixtures particularly in high-position installations, and particularly including LED light fixtures.
  • the present invention is defined by the subject-matter of claim 1 relating to an improved light-fixture.
  • the inventive light fixture includes forward and rearward portions.
  • the rearward portion has a fixture interior and is securable to a fixed support member to hold the fixture in a desired orientation.
  • the rearward portion of the fixture includes an affixed exterior fulcrum configured to pivotably engage one side of the support member when a fixture-adjacent end of the support member is within the fixture interior.
  • the light fixture also includes an engager secured within the fixture interior in position to engage the opposite side of the support member at a position offset from the fulcrum to hold the fixture in the desired orientation when the support member is between the fulcrum and the engager.
  • the fixture further has a frame along and around the forward and rearward portions.
  • the frame also comprises a pair of rearmost extensions between which the fulcrum is secured, the rearmost extensions being rearward of the fixture interior.
  • the fulcrum is spaced rearwardly from the aperture.
  • the fulcrum is shaped to limit lateral movement of the support member thereagainst.
  • the fulcrum may include a row of teeth configured to engage the support member.
  • the fulcrum member includes a support structure for the fulcrum.
  • the frame and the fulcrum member may be formed as a single piece.
  • the single piece may be a metal casting.
  • the housing interior is formed by an upper shell and a lower shell which is movably secured with respect to the upper shell.
  • the frame, the fulcrum member and the upper shell are formed as a single- piece metal casting.
  • the engager is adjustably secured with respect to the upper shell and includes a yoke shaped to substantially conform to the shape of the support member.
  • the yoke has a pair of pin-receiving apertures with a shaft portion of a corresponding pin extending therethrough into threaded engagement with the upper shell.
  • the fixture interior has an angle-referencing region shaped to engage the fixture-adjacent end of the support member to facilitate positioning of the fixture within one of plural predetermined angle ranges with respect to the support member.
  • the angle-referencing region may have a step-likeconfiguration extending downwardly from the upper shell with steps each corresponding to one of the plural predetermined angle ranges. Depending on which of the steps is selected for engagement by the fixture-adjacent end of the support member, adjustment of the engager locks the fixture at a particular angle with respect to the support member within the range of the selected step.
  • the lower shell may be a one-piece polymeric structure having forward and rearward ends.
  • the rearward end has an integrated hinging member hingedly secured to the rearmost portion of the frame.
  • the integrated hinging member has a pair of engaging portions each in snap engagement with one of the side portions of the fulcrum member. Each of the engaging portions is configured for secure pivoting about a respective side of the fulcrum member, thereby providing secure pivotal connection of the lower shell portion with the upper shell with controlled disengagement thereof.
  • the offset position of the hinging member allows a greater angle for swinging the lower shell with respect to the upper shell, i.e., for more clearance from the support member to which the fixture is mounted.
  • the forward end of the lower shell has an integrated latching member detachably securing the forward end of the lower shell with respect to the upper shell, thereby closing the chamber.
  • the integrated latching member may have a spring tab with an engager at one end and a release actuator at the opposite end.
  • the release actuator is configured such that force applied thereto in one direction pivots the engager in the opposite direction sufficiently to release the engager from locking engagement. This detaches the forward end of the lower shell from the upper shell to allow access to the chamber.
  • the engager may be a hook.
  • the forward portion of the fixture is open.
  • An LED assembly is positioned within the open forward portion and is secured with respect to the frame with open spaces remaining therebetween.
  • the LED assembly includes (a) a heat sink including an LED-supporting region and heat-dissipating surfaces extending therefrom and (b) an LED illuminator secured with respect to the LED- supporting region.
  • the frame, the upper shell and the fulcrum are formed as a single piece.
  • the heat sink, the frame, the upper shell and the fulcrum are formed as a single piece.
  • the single piece may be a metal casting.
  • the lower shell may be a one piece polymeric structure.
  • the frame comprises a central portion (which may also be referred to as a core or spine) which has an integral heat sink, at least a portion of the housing that comprises at least one compartment for wiring and/or driver circuitry separate from the LED illuminator, and a mount.
  • the frame further comprises a peripheral portion spaced from the central portion to provide a desired form factor, e.g., such as a cobrahead or other form factor, and/or additional heat sinking.
  • the core has a plurality of compartments, where in some embodiments, at least one of the compartments provides isolation from the LED illuminator.
  • the heat sink is integrated with a compartment, for example, a heat sink surface can form a compartment wall.
  • the heat sink can form an integral backlight shield.
  • the heat sink can comprise a reflective backlight shield.
  • the core is formed from a single piece of die-cast metal.
  • the core comprises the top portion of the housing, and a compartment door of metal or a polymeric material provides access, such as 180 degree access, to the compartment(s) in the housing.
  • the heat sink can comprise an extruded part with lateral fins.
  • the central portion is integrated with the heatsink, supports the housing and provides mounting to a support member.
  • the top and/or bottom enclosure can form the peripheral portion of the frame and provide a desired form factor.
  • the top and/or bottom enclosures can be made of metal and/or a polymeric material.
  • a polymeric material such as a plastic, nylon or polycarbonate
  • the fixture may be able to integrate a fully-enclosed antenna for wireless control of the fixture and be able to provide electrical isolation that allows the use of a removable LED driver.
  • a removable driver is a caseless driver board which is fully encapsulated in a protective polymeric material providing electrostatic discharge (ESD) protection to the driver board which conducting heat away from the driver board during operation.
  • ESD electrostatic discharge
  • the heat sink includes fins in the space between the heat sink and peripheral portions of the frame.
  • at least one thermal connection is provided between the heatsink and the peripheral portion of the frame in a space between the heat sink and the peripheral portion of the frame.
  • open through-spaces are provided on multiple axes, e.g., at least one on a side and at least one on the front or back.
  • the core can be made at least in part of a polymeric material.
  • a polymeric mounting arrangement can be used to mount the lighting fixture to a pole.
  • the entire core is made of a polymeric material.
  • the fixture includes a fulcrum outside a fixture interior which provides advantages such as allowing a smaller aperture for a support-member entry into the fixture interior as well as easier access to the interior by providing more room for clearance of a compartment door has more clearance.
  • the smaller entry aperture may eliminate the need for a splash guard which is typically required for UL listed outdoor light fixtures, while still providing for the possibility of a splash-guard arrangements.
  • the enclosure(s), door and/or housing can be molded and can comprise an integral backlight shield or reflector.
  • ambient fluid means air and/or water around and coming into contact with the light fixture.
  • FIGURES 1-19 , 32-33 and 35-37 illustrate a light fixture 10 which is a first embodiment in accordance with this invention.
  • Light fixture 10 includes a frame 30 and an LED assembly 40 secured with respect to frame 30.
  • Frame 30 surrounds and defines a forward open region 31 and a rearward region 32.
  • Rearward region has a rearmost portion 33 adapted for securement to a support member 11.
  • LED assembly 40 is positioned within open forward region 31 with open spaces 12 remaining therebetween - e.g., between either side of frame 30 and LED assembly 40.
  • Other embodiments are possible where there are additional open spaces or one single open space.
  • LED assembly 40 includes a heat sink 42 and an LED illuminator 41 secured with respect to heat sink 42.
  • Heat sink 42 includes an LED-supporting region 43 with heat-dissipating surfaces 44 extending from LED-supporting region 43.
  • LED illuminator 41 is secured with respect to LED-supporting region 43.
  • LED illuminator 41 includes a circuit board 27 with LED emitters 20 thereon and an optical member 29 over LED emitters 20 for illumination of areas below light fixture 10 (when fixture 10 is mounted in its usual use orientation).
  • FIGURES 27-31 show LED emitters in different forms among those usable in the present invention.
  • Each LED emitter includes one or more light-emitting diodes (LED) 22 with a primary lens 24 thereover, forming what is referred to as LED package.
  • LED light-emitting diodes
  • FIGURES 27 and 28 illustrate exemplary LED packages 23A and 23B each including an array of LEDs 22 on an LED-populated area 25 which has an aspect ratio greater than 1, and primary lenses 24 being overmolded on a submount 26 over LED- populated area 25.
  • the array may include LEDs 22 emitting different- wavelength light of different colors such as including red LEDs along with light green or other colors to achieve natural white light.
  • Light emitters of the type as LED packages 23A and 23B are described in detail in Patent Application Serial No. 13/441,558, filed on April 6, 2012 , and in Patent Application Serial No. 13/441,620, filed on April 6, 2012 . Contents of both applications are incorporated herein by reference in their entirety.
  • FIGURES 27 and 28 also illustrate versions of LED light emitters configured to refract LED-emitted light toward a preferential direction 2.
  • each LED package 23A and 23B each LED array defines emitter axis.
  • FIGURES 27 and 28 illustrate primary lens 24A configured to refract LED-emitted light toward preferential side 2. It should be understood that for higher efficiency LED emitter may have a primary lens having its centerline offset from the emitter axis and also being shaped for refraction of LED-emitted light toward preferential side 2.
  • primary lens 24 A is asymmetric.
  • FIGURES 29-31 show LED package 23D with a single LED 22 on a submount 26 and a hemispheric primary lens 24D coaxially overmolded on submount 26 over LED 22.
  • a plurality of LEDs or LED arrays may be disposed directly on a common submount in spaced relationship between the LEDs or LED arrays each of which is overmolded with a respective primary lens.
  • These types of LED emitters are sometimes referred to as chip-on-board LEDs.
  • LED optical member 29 is a secondary lens placed over the primary lens.
  • optical member 29 includes a plurality of lenses 28 each positioned over a respective one of the primary lenses.
  • the plurality of secondary lenses 28 are shown molded as a single piece 29 with a single flange surrounding each of the plurality of lenses 28.
  • FIGURE 5 also illustrates LED illuminator 41 including a securement structure which includes rigid peripheral structure 411 which applies force along the circuit- board peripheral area toward heat sink 42.
  • This structure serves to increase thermal contact across the facing area of the thermal-engagement surface of circuit board 27 and the surface of heat sink 42 which receives circuit board 27.
  • This arrangement facilitates removal of heat from LED emitters 20 during operation by increasing surface-to-surface contact between the thermal-engagement surface of the circuit board and the heat sink by facilitating excellent, substantially uniform thermal communication from the circuit board to the heat sink, thereby increasing heat transfer from the LEDs to the heat sink during operation.
  • Rigid peripheral structure 411 may be a drawn sheet-metal single-piece structure.
  • a gasket 412 is sandwiched between optical member 29 and heat sink 42, thereby facilitating fluid- tight sealing of the circuit board 27.
  • the securement structure is described in detail in Patent Application Serial No. 61/746,862, filed December 28, 2012 , the entire contents of which are incorporated herein by reference.
  • LED light fixture 10 has a housing 17 and LED assembly 40 is secured with respect to housing 17.
  • Housing 17 has an enclosure 13 which is within rearward region 32 and defines a chamber 14 enclosing electronic LED power circuitry 15.
  • enclosure 13 has an upper shell 34 and a lower shell 35.
  • Lower shell 35 which is a one-piece polymeric structure, is movably secured with respect to upper shell 34, which is a metal structure.
  • the heat sink and the frame are formed as a single piece by metal casting.
  • the frame, the heat sink and the upper shell are all formed as a single piece by metal casting.
  • FIGURES 6 and 7 illustrate electronic LED power circuitry 15 within chamber 14.
  • Such LED power circuitry includes a caseless LED driver 150 which is removably secured to the inner surface of upper shell 34.
  • Driver components of caseless LED driver 150 are encapsulated (potted) in a protective polymeric material prior to installation in the fixture such that Driver 150 is readily replaceable and does not have any potting applied during or after installation in the fixture.
  • Suitable examples of such protective polymeric encapsulating material include thermoplastic materials such as low-pressure injection-molded nylon, which amply protect driver 150 from electrostatic discharge while conducting heat to upper shell 34 to facilitate cooling of the driver during operation.
  • a wireless signal can be received by the antenna which is fully enclosed within chamber 14 along with circuitry for wireless control of the fixture.
  • Such circuitry with the antenna may be included as part of LED driver 150.
  • the advantage of the fully enclosed antenna is also available on other embodiments of this invention having enclosures all or portions of which are non-metallic material.
  • Housing 17 includes a main portion 171 which includes upper shell 34 and lower shell 35 and also includes a forward portion 172 extending forwardly from main portion 171. (Forward portion 172 of housing 17 is the forward portion of frame 30.)
  • main portion 171 upper shell 34 forms a housing body 176 and lower shell 35 serves as a cover member 350 movably secured with respect to housing body 176.
  • housing body 176 of the first embodiment has a main wall 170 (the upper portion of upper shell 34) and a surrounding wall 18 extending downwardly therefrom to a housing-body edge 178.
  • Surrounding wall 18 has two opposed lateral wall-portions 180 extending between a forward heat-sink-adjacent wall-portion 181 and a rearward wall-portion 182.
  • Cover member 350 has a forward end 351 and a rearward end 352.
  • FIGURES 6 , 8 , 9 and 17 show rearward end 352 hingedly secured with respect to rearward wall-portion 182 of housing body 176.
  • polymeric lower shell 35 has an integral hinging member 87 in snap engagement with rearmost portion 33 of frame 30.
  • Hinging member 87 has a pair of engaging portions 88, and the flexibility of the polymeric material of lower shell 35 permits snap engagement of each engaging portion 88 with rearmost portion 33 of frame 30 for secure pivoting thereabout.
  • This provides secure connection of lower shell 35 portion with upper shell 34, allowing lower shell 35 to hang safely in open position during servicing of light fixture 10.
  • the snap engagement of hinging member 87 with rearmost portion 33 allows controlled disengagement of lower shell 35 from upper shell 34.
  • forward end 351 of cover member 350 has an integrated latching member 80 detachably securing forward end 351 of cover member 350 with respect to forward wall-portion 181 of housing body 176, thereby closing chamber 14.
  • cover member 350 has a cover edge 353 which is configured to engage housing-body edge 178.
  • FIGURES 5-7 , 9 and 17 show that integrated latching member 80 includes a spring tab 81 with a hook 82 at one end 80A and a release actuator 83 at opposite end 80B.
  • FIGURE 7 shows hook 82 positioned and configured for locking engagement with respect to housing body 176.
  • Release actuator 83 is configured such that force applied thereto in the direction of arrow 83A pivots hook 82 in opposite direction 82A sufficiently to release hook 82 from the locking engagement. This serves to detach forward end 351 of cover member 350 from housing body 176 to allow access to chamber 14.
  • cover member 350 and housing body 176 may be possible.
  • hook 82 is positioned and configured for locking engagement with the one-piece casting.
  • Integrated latching member 80 also includes a cover-member forward extension 84 extending beyond forward wall-portion 181 of housing-body surrounding wall 18.
  • Spring tab 81 is supported by forward extension 84 such that hook 82 is positioned for locking engagement with heat sink 42.
  • heat sink 42 has a protrusion 85 configured and positioned for locking engagement by hook 82.
  • Light fixture 10B of the third embodiment shown in FIGURES 21 and 22 and which as indicated above includes frame 30B and heat sink 42B formed as a one-piece metal casting, has upper shell 34B and lower shell 35B both formed of polymeric material.
  • the enclosure 13B which is formed by such polymeric shells is secured with respect to the metal casting of this embodiment.
  • LED light fixture IOC has a non-metallic (polymeric) frame 30C.
  • Frame 30C defines a forward open region 31C and has a rearward region 32C with a rearmost portion 33C adapted for securement to support member 11.
  • FIGURES 24- 26 illustrate a fifth embodiment of this invention.
  • Light fixture 10D has an LED assembly 40D secured with respect to a non-metallic (polymeric) frame 30D.
  • the frame itself serves to for the enclosure for the LED power circuitry, and such circuitry may include a fully-enclosed antenna.
  • FIGURES 23-26 each include extruded heat sinks which are characterized by having fins extending laterally on either side and forwardly on the front side.
  • the extruded heat sink has been extruded in a direction orthogonal to both the forward and the lateral directions.
  • the extruded dimension, which is illustrated by numeral 72 in FIGURE 26 is less than the forward- rearward and side-to-side dimensions 73 and 74 of such heat sink, as illustrated in
  • the fins may be on at least three sides of the heat sink, as seen in FIGURES 34 , 40 , 38A and 39A .
  • through-spaces 12 may be located along at least two of transverse sides of the heat sink, e.g., at least on one lateral side and on the front and rear sides of the heat sink.
  • the heat sinks of the fourth and fifth embodiments are facilitated by structure shown best in FIGURES 25 and 26 .
  • the heat sinks are each formed by an extrusion having a middle portion void, i.e., having walls 76 defining a central opening 77.
  • these heat sinks include, in addition to such extrusion, a mounting plate 78 in thermal contact with the extrusion.
  • Mounting plate 78 may be thermally engaged to the extrusion by screws or in other ways.
  • LED illuminator 41 is secured to mounting plate 78.
  • the laterally- and forwardly-extending fins are open to free flow of ambient fluid (air and water), and their position and orientation serve to promote rapid heat exchange with the atmosphere and therefore rapid cooling of the LED illuminator during operation. Upwardly-flowing air and downwardly- flowing water (in the presence of precipitation) facilitate effective cooling, and reduce the need for upwardly-extending fins on top of the heat sinks.
  • Heat sink 42 of such embodiment has a front side 48, a rear side 49 and lateral sides 50 and is open to ambient- fluid flow to and from the various heat-dissipating surfaces 44.
  • Heat sink 42 includes a central portion 45 and peripheral portions 46 along opposite lateral sides 50.
  • Peripheral portions 46 have peripheral heat-dissipating surfaces 47 along lateral sides 50 of heat sink 42.
  • Central portion 45 includes LED-supporting region 43 and has central heat-dissipating surfaces 51 opposite LED illuminator 41 from which a plurality of elongate fins 53 protrude in a direction opposite LED illuminator 41.
  • Fins 53 extend from front fin-ends 54 adjacent to front side 48 of heat sink 42 to rear fin- ends 55 adjacent to rear side 49 of heat sink 42. As shown in FIGURES 3 , 10 , 16 and 19-22 , some of rear fin-ends 55 are integral with housing 17.
  • FIGURES 3 , 17 , 19 , 25 and 34 show central-portion openings 52 facilitating ambient- fluid flow to and from heat-dissipating surfaces 51 of central portion 45.
  • Central-portion openings 52 are adjacent to enclosure 13 and are partially defined by housing 17.
  • Fins 53 of central portion 45 define between-fin channels 56 (shown in FIGURE 13 ), which in a mounted position extend along a plane which is close to, but not, horizontal. Between-fin channels 56 are open at front fin-ends 54; i.e., there is no structural barrier to flow of liquid from between-fin channels 56 at front fin-ends 54.
  • fins 53A are configured such that between-fin channels 56A are open along the front and lateral sides of the heat sink.
  • FIGURES 3 and 19 show rear fin- ends 55 configured to permit ambient-fluid flow from between-fin channels 56 to central-portion openings 52, thereby to facilitate liquid drainage therefrom. Liquid drainage from the top of heat sink 42 is facilitated by inclination of the top surface of heat sink 42, as explained more specifically below.
  • FIGURES 32 and 33 show between-fin surfaces 57 inclined off-horizontal when light fixture 10 is in its usual use orientation. More specifically, FIGURE 32 shows surfaces 57 sloping toward lateral sides 50 of heat sink 42, FIGURE 33 shows surfaces 57 sloping toward front and rear sides 48 and 49 of heat sink 42. In other words, portions of surfaces 57 are slightly but sufficiently downwardly inclined toward at least two dimensions and in this embodiment on each of the four sides of heat sink 42.
  • FIGURES 32 and 33 show LED assembly 40 on a bottom surface of heat sink 42.
  • Heat sink 42 when the fixture is in its mounted orientation, includes a top surface which in plan view has a surrounding edge.
  • FIGURES 32 shows the top surface sloping downwardly toward the surrounding edge in opposite lateral plan- view directions, thereby to facilitate liquid drainage from the heat sink.
  • FIGURES 33 shows the top surface sloping downwardly toward the surrounding edge in the forward and rearward directions.
  • FIGURE 32 further shows plurality of elongate fins 53 protruding from the top surface in a direction opposite LED illuminator 41. Sloping top surface includes between-fin surfaces 57.
  • FIGURE 2 and 16 show housing 17 including a housing top surface sloping downwardly in the forward direction. These figures also show the top housing surface sloping toward the top surface of heat sink 42, whereby liquid drainage from the housing facilitates cooling of heat sink 42.
  • FIGURES 14 and 15 show the housing top surface sloping downwardly in opposite lateral plan- view directions, thereby to facilitate liquid drainage therefrom.
  • Housing upper shell 34 and heat sink 42 are formed as a single piece, whereby the housing upper shell facilitates heat dissipation.
  • the heat sink, the frame and the housing upper shell are formed as a single piece.
  • LED light fixture 10 has various advantageous structural taperings.
  • heat sink 42 in plan view is tapered such that it is wider at its rearward end than at its forward end.
  • each of central-portion fins 53 has a tapered configuration such that its vertical dimension at the rearward end of heat sink 42 is greater than its vertical dimension at the forward end of heat sink 42.
  • fins 53 have progressively lesser vertical dimensions toward each of opposite lateral sides 50 of heat sink 42.
  • peripheral portions 46 of heat sink 42 extend along opposite lateral sides 50.
  • Peripheral heat-dissipating surfaces 47 include a plurality of fins 59 extending laterally from central portion 45 of heat sink 42, with open spaces 60 formed between adjacent pairs of fins 59.
  • peripheral portion 46 also has a peripheral fin 59A along each lateral side 50 of heat sink 42.
  • Peripheral fins 59A extend in length from front fin-ends 54A adjacent to front side 48 of heat sink 42 to rear fin-ends 55 A adjacent to rear side 49 of heat sink 42.
  • Rear fin-ends 55 A of peripheral fins 59A are integral with housing 17.
  • the configuration of peripheral portions 46 of heat sink 42 serve to facilitate cooling by providing additional heat-exchange surfaces in particular effective locations.
  • the various embodiments disclosed herein each illustrate one aspect of the present invention particularly related to the frame and open character of the fixtures. This is discussed in particular with respect to the first embodiment, and in particular with reference to FIGURES 35-37 which schematically illustrate "projected" areas of structure and through-spaces of the fixture in plan view. More specifically, the first embodiment includes the following projected areas:
  • FIGURES 35-37 show projected LED-assembly area 37 of about 60% of the projected forward-region area 36.
  • the total through-space area of the two lateral side voids 12 is about two-thirds of projected LED-assembly area 37.
  • plane P is defined by LED illuminator 41 directly facing the area to be illuminated.
  • the intersections referred to above with such plane P are illustrated in FIGURES 35 and 37 .
  • the total through-space area in the illuminator plane is slightly over 15% of the fixture area.
  • the total through-space area in the illuminator plane may be at least about 40% of the fixture area. Described differently, the total through-space area in illuminator plane P is about two-thirds of the projected LED-assembly area.
  • FIGURE 20 illustrates an embodiment in which light fixture 10A has openness along the majority of its length. More specifically, the openness extends well to the rear of the forward portion of fixture 10A, i.e., well to the rear of the LED assembly of such fixture, including on either side of the enclosure.
  • Such openness in an LED light fixture offers great flexibility from the standpoint of form-factor design, e.g., allowing overall shape of the fixtures to better accommodate replacement of existing non-LED fixtures of various shapes.
  • Several of the embodiments disclosed herein have frames which at least in their forward portions provide a footprint substantially similar to the footprint of so-called "cobrahead” light fixtures. This is achieved despite the fact that the LED assemblies used in fixtures according to the resent invention have substantially straight opposite lateral sides, as seen in the figures.
  • FIGURES 1 , 6 , 7 and 11-13 Another aspect of the present inventive light fixtures is illustrated in FIGURES 1 , 6 , 7 and 11-13 .
  • central portion 45 of heat sink 42 has downwardly-extending shield members 65 at lateral sides 50 of heat sink 42.
  • Shield members 65 are configured and dimensioned to block illumination which, when fixture 10 is installed as street-light, minimize upward illumination. This facilitates compliance with "dark-sky" requirements for limiting light pollution.
  • FIGURE 16 shows that optical member 29 is configured for light in preferential direction 2 toward the forward side.
  • FIGURES 1 , 6 , 7 , 11-14 and 16 show a downwardly-extending shield member 66 at rearward side 49 of central heat- sink portion 45.
  • Shield member 66 is configured and dimensioned to block rearward illumination.
  • Rearward shield member 66 extends to a position lower than the lowermost outer-surface portion 290 of optical member 29.
  • Rearward shield member 66 may include a reflective coating redirecting rearward light.
  • FIGURES 1 , 6 , 7 , 11-14 and 16 show that forward wall-portion 181 of housing main portion 171 partially defines rearward shield member 66. These figures also show cover-member forward end 351, which is secured to forward wall-portion 181 of housing body 176, partially defining rearward shield member 66. Reflective or white coating of housing 17 may provide reflective characteristics for redirecting rearward light toward the preferential forward side 2.
  • cover member 350 has a cover wall 354 extending between rearward and forward ends 352 and 351.
  • Cover wall 354 includes a lowermost portion 354A which is at a position lower than lowermost position 66A of rearward shield member 66 to further block rearward illumination.
  • Reflective or white coating of cover wall 354 may provide reflective characteristics for redirecting rearward light in useful direction.
  • back-light shielding has been in the form of individual shields disposed on a non-preferential side of each LED emitter. Some of such prior shielding was positioned over the exterior of a corresponding lens.
  • shields were in the form of a separate structure secured with respect to the fixture rearwardly to the illuminator.
  • Such separate shielding structures often requires complicated securement arrangements as well as interfered with the overall shape of the light fixture.
  • the integrated back-light shielding of the present invention provides effective blocking of rearward light and providing reflection of such light away from areas of undesired illumination.
  • the reflection provides by the integrated back-light shield of this invention facilitates higher light-output efficiency of the LED illuminator used in the LED light fixture of the present invention.
  • the integrated nature of the back-light shielding of the present invention provides all the benefits of a single back-light shield without disruption of the overall shape of the fixture.
  • the back-light shielding of the present invention is defined by surfaces which are open to air and water flow, which facilitates self cleaning of the reflective surface and minimized absorption of light received by such shield surface.
  • FIGURES 3-6 , 8-10 , 15- 19 , 21 and 22 show an exterior fulcrum 90 of fixture 10 affixed to rearward portion 33 of the fixture. Fulcrum 90 is configured to pivotably engage one side 11A of support member 11 when a fixture-adjacent end 110 of support member 11 is within fixture interior 19.
  • FIGURES 5 , 6 , 9 , 16 , 17 and 22 show that fixture 10 also includes an engager 91 secured within fixture interior 19 in position to engage the opposite side 11 B of support member 11 at a position offset from fulcrum 90. This arrangement holds fixture 10 in the desired orientation when support member 11 is held between fulcrum 90 and engager 91.
  • FIGURES 8-10 show that fulcrum 90 is shaped to limit lateral movement of support member 11 thereagainst by its cradling shape and the fact that fulcrum 90 includes a row of teeth 92 configured to engage support member 11.
  • Fulcrum 90 is part of a fulcrum member 93 which also includes support structure 95 for fulcrum 90.
  • FIGURES 3, 4 , 8-10 , 15 , 18 and 19 show frame 30 having a pair of rearmost extensions 39 between which fulcrum 90 is secured.
  • FIGURE 10 also shows heat sink 42, frame 30, upper shell 34 and fulcrum 90 formed as a single piece.
  • the exterior fulcrum provides advantages such as allowing a smaller aperture for a support-member entry into the fixture interior 13 as well as easier access to the interior by providing more room for clearance of a compartment door has more clearance.
  • the smaller entry aperture may eliminate the need for a splash guard which is typically required for UL listed outdoor light fixtures, while still providing for the possibility of a splash-guard arrangements.
  • engager 91 is adjustably secured with respect to upper shell 34 and includes a yoke 96 shaped to substantially conform to the shape of support member 11.
  • Yoke 96 has a pair of pin-receiving apertures 97 with a shaft portion 98A of a corresponding pin 98 extend therethrough into threaded engagement with upper shell 34.
  • FIGURES 16 and 17 show that fixture interior 19 has an angle-referencing region 340 shaped to engage fixture-adjacent end 110 of support member 11 in order to facilitate positioning of fixture 10 (with respect to support member 11) within one of plural predetermined angle ranges 342.
  • FIGURE 16 shows angle-referencing region 340 as a step-like configuration extending downwardly from upper shell 34. Steps 341 each correspond to one of the plural predetermined angle ranges such that, depending on which of steps 341 is selected for engagement by fixture-adjacent end 1 10 of support member 1 1 , adjustment of engager 91 locks fixture 10 at a particular angle with respect to support member 1 1 within the range of the selected step 341.
  • Such predetermined angle ranges are range 342A (which includes the range of about - 5 ° to about -2.5 °), range 342B (which includes the range of about -2.5 ° to about 0°), range 342C (which includes the range of about 0° to about +2.5 °), range 342D (which includes the range of about +2.5 ° to less than about +5 °), and range 342E (which includes the range of about +5 °).
  • FIGURES 3 and 4 show light fixture 10 which in plan view has central and outward portions.
  • the central portion includes housing 17 enclosing LED power circuitry, heat sink 42 secured with respect to housing 17 and supporting LED illuminator 40.
  • the central portion also includes a mount adapted for securement to support member 1 1.
  • outward portion defines an outer plan- view shape of fixture 10 and is secured to the central portion with through- space(s) 12 between the central and outward portions.
  • through-spaces 12 are along heat sink 42 on opposite sides thereof. Through-spaces are shown along opposite sides of the central portion.
  • FIGURE 20 shows through-spaces 12 beings along housing 17.
  • the outward portion has an outer perimeter which in plan view may be substantially similar to the footprint of a cobrahead non-LED light fixture.
  • This invention gives great flexibility in providing LED light fixtures for a variety of particular roadway lighting and other similar outdoor lighting purposes.
  • the desired light-output level determined by the particular application and/or determined by dimensional constrains e.g., pole height, area to be illuminated, and desired foot-candles of illumination in the target area
  • the open "footprint" of the fixture of this invention allows such flexibility in a light fixture with advantageous performance characteristics, both in light output and in heat dissipation.
  • One example of such light fixture is the fixture referred to as the first embodiment.
  • CCT LED correlated color temperature
  • Higher lumen outputs can be achieved by corresponding adjustments in the number and nature of LED emitters with or without corresponding adjustment of the heat sink. These changes can be made with or without change in the "footprint" of the fixture.

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

Claims (14)

  1. Beleuchtungskörper (10), der an einem feststehenden Tragelement (11) befestigbar ist, um den Beleuchtungskörper (10) in einer gewünschten Ausrichtung zu halten, wobei der Beleuchtungskörper (10) folgendes aufweist:
    vordere und hintere Abschnitte, wobei der hintere Abschnitt einen Beleuchtungskörper-Innenbereich (19) mit einer Öffnung zur Tragelement-Aufnahme in dem Beleuchtungskörper-Innenbereich (19) definiert und ein äußeres Gelenkelement (90) aufweist, das derart eingerichtet ist, um mit einer Seite des Tragelements (11) schwenkbar in Eingriff zu stehen, wenn sich ein zum Beleuchtungskörper benachbartes Ende (110) des Tragelements (11) in dem Beleuchtungskörper-Innenbereich (19) befindet; und
    ein Eingriffselement (91), das in dem Beleuchtungskörper-Innenbereich (19) lagefixiert ist, so dass es an der gegenüber liegenden Seite des Tragelements (11) an einer zum äußeren Gelenkelement (90) versetzten Position in Eingriff steht, um den Beleuchtungskörper (10) in der gewünschten Ausrichtung zu halten, wenn sich das Tragelement (11) zwischen dem äußeren Gelenkelement (90) und dem Eingriffselement (91) befindet;
    dadurch gekennzeichnet, dass
    der Beleuchtungskörper (10) einen Rahmen (30) aufweist, der sich entlang und um die vorderen und hinteren Abschnitte erstreckt und der ein Paar hinterer Fortsätze (39) umfasst, zwischen welchen das Gelenkelement (90) befestigt ist, wobei sich die hinteren Fortsätze (39) hinter dem Beleuchtungskörper-Innenbereich (19) befinden, und
    wobei das Gelenkelement (90) von der Öffnung nach hinten beabstandet ist.
  2. Beleuchtungskörper (10) nach Anspruch 1, wobei das Gelenkelement (90) so geformt ist, um eine seitliche Bewegung des Tragelements (11) gegenüber diesem zu begrenzen.
  3. Beleuchtungskörper (10) nach Anspruch 2, wobei das Gelenkelement (90) eine Reihe von Zähnen (92) aufweist, die dazu eingerichtet sind, um mit dem Tragelement (11) in Eingriff zu stehen.
  4. Beleuchtungskörper (10) nach Anspruch 1, wobei eine Gelenkelement-Anordnung (93) eine Haltestruktur (95) für das Gelenkelement (90) umfasst.
  5. Beleuchtungskörper (10) nach Anspruch 1 oder 4, wobei das Gelenkelement (90) so geformt ist, dass es im Wesentlichen an die Form des Tragelements (11) angepasst ist.
  6. Beleuchtungskörper (10) nach Anspruch 1, 4 oder 5, wobei der Rahmen (30) und die Gelenkelement-Anordnung (93) einstückig ausgebildet sind.
  7. Beleuchtungskörper (10) nach Anspruch 1, wobei das Gehäuseinnere von einer oberen Halbschale (34) und einer unteren Halbschale (35), die bezüglich der oberen Halbschale (34) beweglich befestigt ist, gebildet wird, wobei das Eingriffselement (91) bezüglich der oberen Halbschale (34) verstellbar befestigt ist.
  8. Beleuchtungskörper (10) nach Anspruch 7, wobei das Eingriffselement (91) ein Bügelelement (96) umfasst, das so geformt ist, dass es im Wesentlichen an die Form des Tragelements (11) angepasst ist, wobei das Bügelelement (96) ein Paar Bolzen-Aufnahmeöffnungen (97) aufweist, wobei sich ein Schaftabschnitt (98A) des entsprechenden Bolzens (98) in Schraubverbindung mit der oberen Halbschale (34) dahindurch erstreckt.
  9. Beleuchtungskörper (10) nach Anspruch 1, wobei der Beleuchtungskörper-Innenbereich einen Winkelbezugsbereich (340) hat, der so geformt ist, dass er mit dem zum Beleuchtungskörper benachbarten Ende (110) des Tragelements (11) in Eingriff steht, um das Positionieren des Beleuchtungskörpers (10) in einem aus einer Mehrzahl von vorbestimmten Winkelbereichen bezüglich des Tragelements (11) zu erleichtern.
  10. Beleuchtungskörper (10) nach Anspruch 9, wobei der Winkelbezugsbereich (340) eine stufenförmige Konfiguration aufweist, die sich von der oberen Halbschale (34) mit Stufen (341), von denen jede einem der Mehrzahl von vorbestimmten Winkelbereichen entspricht, derart nach unten erstreckt, dass, abhängig davon, welche der Stufen (341) zum Eingriff mit dem zum Beleuchtungskörper benachbarten Ende (110) des Tragelements (11) gewählt wird, die Justierung des Eingriffselements (91) den Beleuchtungskörper (10) in einem bestimmten Winkel zum Stützelement (11) im Bereich der gewählten Stufe (341) arretiert.
  11. Beleuchtungskörper (10) nach Anspruch 1, wobei:
    das Gehäuseinnere von einer oberen Halbschale (34) und einer unteren Halbschale (35) gebildet wird, die bezüglich der oberen Halbschale (34) beweglich befestigt ist; und
    die untere Halbschale (35) eine einstückige Polymerkonstruktion ist, die vordere und hintere Enden aufweist, wobei das hintere Ende ein integriertes Scharnierelement (87) aufweist, das mit dem hinteren Abschnitt (33) des Rahmens (30) gelenkig verbunden ist.
  12. Beleuchtungskörper (10) nach Anspruch 11, wobei:
    das integrierte Scharnierelement (87) ein Paar Eingriffsabschnitte (88) aufweist, die jeweils mit einem der Seitenabschnitte der Gelenkelement-Anordnung (93) in Rastverbindung stehen und derart eingerichtet sind, um eine sichere Schwenkbewegung um eine jeweilige Seite der Gelenkelement-Anordnung (93) zu ermöglichen, so dass eine sichere Schwenkverbindung des unteren Halbschalenteils mit der oberen Halbschale (34) mit einem kontrollieren Lösen von dieser geschaffen wird;
    das vordere Ende (351) der unteren Halbschale (35) ein integriertes Rastelement (80) aufweist, welches das vordere Ende der unteren Halbschale (35) bezüglich der oberen Halbschale (34) lösbar befestigt, so dass die Kammer (14) geschlossen ist, wobei das integrierte Rastelement (80) eine Rastfeder (81) mit einem Eingriffselement (80) an einem Ende (80A) sowie ein Löse-Betätigungselement (83) an dem gegenüber liegenden Ende (80B) aufweist, wobei das Löse-Betätigungselement (83) derart eingerichtet ist, dass eine darauf aufgebrachte Kraft in einer Richtung das Eingriffselement in der entgegen gesetzten Richtung ausreichend in Schwenkbewegung versetzt, um das Eingriffselement aus dem Eingriff zu bringen, so dass das vordere Ende (351) der unteren Halbschale (35) von der oberen Halbschale (34) gelöst wird, um einen Zugriff in die Kammer (14) zu erhalten.
  13. Beleuchtungskörper (10) nach Anspruch 1, 6 oder 12, wobei der Rahmen (30), die Gelenkelement-Anordnung (93) und die obere Halbschale (34) einstückig ausgebildet sind.
  14. Beleuchtungskörper (10) nach Anspruch 6 oder 13, wobei das einstückige Gebilde ein Metallguss ist.
EP14746658.5A 2013-01-31 2014-01-31 Beleuchtungskörper-stützanordnung Active EP2951502B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201313444511A 2013-01-31 2013-01-31
US13/764,749 US9435519B2 (en) 2013-01-31 2013-02-11 Light-fixture support assembly
PCT/US2014/014117 WO2014121059A1 (en) 2013-01-31 2014-01-31 Light-fixture support assembly

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EP2951502A1 EP2951502A1 (de) 2015-12-09
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387866A (en) * 1966-02-16 1968-06-11 Gen Electric Luminaire

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100073939A1 (en) * 2008-09-19 2010-03-25 Howard Industries, Inc. Roadway luminaire system
KR101181784B1 (ko) * 2011-05-23 2012-09-12 엘지전자 주식회사 조명 장치

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387866A (en) * 1966-02-16 1968-06-11 Gen Electric Luminaire

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EP2951502A1 (de) 2015-12-09

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