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WO2013060510A1 - An led illuminating device - Google Patents

An led illuminating device Download PDF

Info

Publication number
WO2013060510A1
WO2013060510A1 PCT/EP2012/066811 EP2012066811W WO2013060510A1 WO 2013060510 A1 WO2013060510 A1 WO 2013060510A1 EP 2012066811 W EP2012066811 W EP 2012066811W WO 2013060510 A1 WO2013060510 A1 WO 2013060510A1
Authority
WO
WIPO (PCT)
Prior art keywords
illuminating device
led
led illuminating
driver
circuit board
Prior art date
Application number
PCT/EP2012/066811
Other languages
French (fr)
Inventor
Junhua ZHEN
Jing Lin
Jin Hu
Dirk Buchhauser
Original Assignee
Osram Gmbh
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 Osram Gmbh filed Critical Osram Gmbh
Publication of WO2013060510A1 publication Critical patent/WO2013060510A1/en

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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/004—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by deformation of parts or snap action mountings, e.g. using clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/36—Assembling printed circuits with other printed circuits
    • H05K3/366—Assembling printed circuits with other printed circuits substantially perpendicularly to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/238—Arrangement or mounting of circuit elements integrated in the light source
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • F21V23/006—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • 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]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/117—Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/03—Conductive materials
    • H05K2201/0332—Structure of the conductor
    • H05K2201/0388—Other aspects of conductors
    • H05K2201/0397—Tab
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09009—Substrate related
    • H05K2201/09027—Non-rectangular flat PCB, e.g. circular
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09145—Edge details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]

Definitions

  • the present invention relates to an LED illuminating device.
  • LED illumination has irreplaceable advantages, such as energy saving, low power consumption, and electrical-to-optical conversion efficiency near to 100%. It can save more than 80% energy and has a longer service lifetime compared with the traditional light source with the same illuminating efficiency.
  • the LED is used more and more as a light source such as a lot of LED retrofit lamps in the market.
  • Such LED retrofit lamps have the same appearance and profile as the traditional light source such as incandescent lamp, thus they can be more applicable to the existing illuminating systems as a light source .
  • the LED retrofit lamp has a driver housing for accommodating an LED driver, a heat sink that has one end fixed on the driver housing and the other end thermally contacting a printed circuit board carrying an LED light-emitting assembly, and a hemispherical bulb provided at the other end of the heat sink to enclose the printed circuit board carrying the LED light- emitting assembly.
  • the heat sink of such LED retrofit lamp is configured to be hollow to arrange the driver housing for accommodating the LED driver therein.
  • the driver housing mostly made from plastic or the printed circuit board carrying the LED light-emitting assembly should be fixed on the heat sink via bolts or surface-mount technology such as welding, this may cause crack of the plastic driver housing or the heat sink when fixed via welding or bolts and also may result in damage to electronic devices sensitive to temperature on the printed circuit board.
  • the present invention provides an LED illuminating device, of which various parts do not need to be assembled together via traditional bolts or surface-mount technology such as welding, so that adverse influences on the parts of the LED illuminating device will be effectively avoided during the assembling and the assembling becomes simpler.
  • the object of the present invention is accomplished via an LED illuminating device.
  • the LED illuminating device comprises a heat sink, a light engine, an LED driver and a driver housing for accommodating the LED driver, wherein a separation wall is formed in the heat sink, and the light engine and the driver housing accommodating the LED driver are arranged on a first surface and a second surface of the separation wall opposite to each other, wherein the LED illuminating device further comprises a connector that presses the light engine on the first surface of the separation wall and is locked with the driver housing on the second surface of the separation wall.
  • the connector comprises a plate-like body having at least two hooks extending from the plate- like body, the driver housing has at least two openings for engaged with respective hook.
  • the connector and the driver housing are arranged on two opposite surfaces of the separation wall of the heat sink, the connector and the driver housing tightly hold the separation wall of the heat sink, and further the heat sink per se, therebetween after respective hook is engaged with respective opening, thereby, a stable fixed connection is established.
  • Such simple engagement completely replaces the traditional assembling manner, and bolts or welding is not used.
  • the hooks are arranged on a circumferential edge of the plate-like body, opposite to each other. Accordingly, the connector and the driver housing can be stably connected after respective hook is engaged with respective opening.
  • At least two first through holes are opened in the separation wall, and respective hook is engaged with respective opening through respective first through hole.
  • the heat sink is assured to revolve in relation to the connector, which further holds the heat sink stably between the connector and the driver housing.
  • the light engine comprises a printed circuit board and an LED chip arranged on the printed circuit board.
  • a second through hole is opened in the separation wall, wherein a cut is formed on the printed circuit board, and an electrical pin of the LED driver passes through the cut via the second through hole.
  • a light emergent opening for exposing the LED chip and a pin hole through which the electrical pin passes are opened in the plate-like body, an electrical rail is formed on an inner wall of the pin hole, a conductive contact is formed on the printed circuit board, and the electrical rail conductively contacts the conductive contact and the electrical pin, respectively.
  • the connector serves the function of fixing the light engine and the driver housing, and on the other hand, serves the function of an electrical connection bridge between the light engine and the driver, wherein the electrical connection is realized via simple direct contact without welding, which significantly simplifies the manufacturing process and reduces the cost.
  • a projecting portion is formed on the plate-like body at one side of the plate- like body away from the printed circuit board, and the pin hole is opened in the projecting portion.
  • the projecting portion may envelop entirely the electrical pin passing through the cut of the printed circuit board so as to protect the same and prevent foreign matters from contacting the electrical pin, avoiding undesirable short circuit.
  • the circumferential edge of the plate-like body encloses a circumferential edge of the printed circuit board.
  • the connector according to the present invention encloses entirely the printed circuit board, thus the printed circuit board is further protected against external interference.
  • the connector is made from an insulating material.
  • the connector also may be made from other materials including metals such as copper having a high coefficient of thermal conductivity, while the printed circuit board should be subjected to an insulation process for assuring the connector made from metals not to cause short circuit of the parts on the printed circuit board.
  • Fig. 1 is an exploded view of an LED illuminating device of the present invention
  • Fig. 2 is a schematic diagram of the assembled LED illuminating device assembled of the present invention
  • Fig. 3a is a schematic diagram of one surface of a connector of the LED illuminating device of the present invention
  • Fig. 3b is another schematic diagram of the other surface of the connector of the LED illuminating device of the present invention
  • Fig. 3c is a schematic diagram of a light engine of the LED illuminating device of the present invention.
  • Fig. 3d is a schematic diagram of a driver of the LED illuminating device of the present invention.
  • Fig. 3e is a schematic diagram of a heat sink of the LED illuminating device of the present invention.
  • Fig. 3f is a schematic diagram of a driver housing of the LED illuminating device of the present invention.
  • Fig. 1 is an exploded view of an LED illuminating device of the present invention.
  • the LED illuminating device according to the present invention comprises a heat sink 1, a light engine 2, an LED driver 3 and a driver housing 4 for accommodating the LED driver 3.
  • the LED illuminating device according to the present invention is configured as an LED retrofit lamp having the appearance and profile of the traditional incandescent lamp. It can be seen from Fig. 1 that a separation wall A is formed in the heat sink 1, and the light engine 2 and the driver housing 4 accommodating the LED driver 3 are arranged on a first surface and a second surface of the separation wall A opposite to the first surface, respectively.
  • the LED illuminating device according to the present invention further comprises a connector 5 that presses the light engine 2 on the first surface of the separation wall A and is locked with the driver housing 4 on the second surface of the separation wall A.
  • Fig. 2 is a schematic diagram of the assembled LED illuminating device of the present invention .
  • Fig. 3a - Fig. 3f are schematic diagrams of various parts of the LED illuminating device of the present invention.
  • Fig. 3a is a schematic diagram of one surface of the connector 5, wherein the connector 5 comprises a plate-like body 5a having at least two hooks 6 extending from the plate-like body 5a, and the driver housing 4 shown in Fig. 3f has at least two openings 7 in cooperation with the hooks 6.
  • the plate- like body 5a has a projecting portion 5e at one side away from a printed circuit board 2a, and a pin hole 5c is formed in the projecting portion 5e.
  • a light emergent opening 5b is formed in a center of the plate- like body 5a for exposing an LED chip 2c of the light engine 2 shown in Fig. 3c.
  • Fig. 3b is another schematic diagram of the other surface of the connector 5.
  • the hooks 6 are arranged on opposite sides of a circumferential edge of the plate-like body 5a that has a profile matching the printed circuit board 2a, and a circumferential edge 5f extending towards a direction of the printed circuit board 2a is formed at one side of the plate- like body 5a facing the printed circuit board 2a and encloses a circumferential edge of the printed circuit board 2a.
  • an electrical rail 5d is formed on an inner wall of the pin hole 5c and electrically contacts an electrical pin 3a of the LED driver 3 shown in Fig. 3d.
  • the electrical rail 5d extends onto a surface of the plate-like body 5a for allowing an electric contact between the electrical rail 5d and a conductive contact 2d on the printed circuit board 2a shown in Fig. 3c during assembling.
  • the light engine 2 comprises the printed circuit board 2a and the LED chip 2c arranged on the printed circuit board 2a, a cut 2b is formed on the printed circuit board 2a, and the conductive contact 2d is formed near the cut 2b.
  • Fig. 3e is a schematic diagram of the heat sink of the LED illuminating device of the present invention.
  • the separation wall A is formed in the heat sink 1, and the light engine 2 and the driver housing 4 accommodating the LED driver 3 are arranged on the first surface and the second surface of the separation wall A opposite to each other, respectively.
  • two first through holes la are opened in the separation wall A, and respective hook 6 passes through the first through hole la to be engaged with respective opening 7.
  • a second through hole lb is further opened in the separation wall A, and the electrical pin 3a of the LED driver 3 passes through the second through hole lb to insert into the cut 2b.
  • the openings 7 are opened in a housing wall of the driver housing 4.
  • the driver housing 4 is inserted into an accommodation portion of the heat sink 1 against the second surface of the separation wall A of the heat sink 1; and at the same time, the electrical pin 3a of the driver 3 passes through the second through hole lb of the separation wall A.
  • the light engine 2 is arranged on the separation wall A to align the cut 2b of the light engine 2 with the second through hole lb of the separation wall A.
  • the connector 5 is coupled with the light engine 2 to expose the LED chip 2c of the light engine 2 from the light emergent opening 5b of the connector 5; respective hook 6 of the connector passes through respective first through hole la of the separation wall A and is engaged with respective opening 7, and the electrical pin 3a passes through the cut 2b to insert into the pin hole 5c.
  • the electrical rail 5d is formed on the inner wall of the pin hole 5c and conductively contacts the conductive contact 2d and the electrical pin 3a, respectively, therefore, a reliable electrical connection is established between the driver 3 and the light engine 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

The present invention relates to an LED illuminating device, comprising a heat sink (1), a light engine (2), an LED driver (3) and a driver housing (4) for accommodating the LED driver (3), a separation wall (A) being formed in the heat sink (1), and the light engine (2) and the driver housing (4) accommodating the LED driver (3) being arranged on a first surface and a second surface of the separation wall (A) opposite to the first surface, wherein the LED illuminating device further comprises a connector (5) that presses the light engine (2) on the first surface of the separation wall (A) and is locked with the driver housing (4) on the second surface of the separation wall (A).

Description

Description
An LED Illuminating Device
Technical Field
The present invention relates to an LED illuminating device. Background Art
As everyone knows, LED illumination has irreplaceable advantages, such as energy saving, low power consumption, and electrical-to-optical conversion efficiency near to 100%. It can save more than 80% energy and has a longer service lifetime compared with the traditional light source with the same illuminating efficiency. In view of the above advantages, the LED is used more and more as a light source such as a lot of LED retrofit lamps in the market. Such LED retrofit lamps have the same appearance and profile as the traditional light source such as incandescent lamp, thus they can be more applicable to the existing illuminating systems as a light source .
An LED retrofit lamp is disclosed in the prior art. The LED retrofit lamp has a driver housing for accommodating an LED driver, a heat sink that has one end fixed on the driver housing and the other end thermally contacting a printed circuit board carrying an LED light-emitting assembly, and a hemispherical bulb provided at the other end of the heat sink to enclose the printed circuit board carrying the LED light- emitting assembly. The heat sink of such LED retrofit lamp is configured to be hollow to arrange the driver housing for accommodating the LED driver therein. However, as the driver housing mostly made from plastic or the printed circuit board carrying the LED light-emitting assembly should be fixed on the heat sink via bolts or surface-mount technology such as welding, this may cause crack of the plastic driver housing or the heat sink when fixed via welding or bolts and also may result in damage to electronic devices sensitive to temperature on the printed circuit board.
Summary of the Invention
Therefore, the present invention provides an LED illuminating device, of which various parts do not need to be assembled together via traditional bolts or surface-mount technology such as welding, so that adverse influences on the parts of the LED illuminating device will be effectively avoided during the assembling and the assembling becomes simpler.
The object of the present invention is accomplished via an LED illuminating device. The LED illuminating device comprises a heat sink, a light engine, an LED driver and a driver housing for accommodating the LED driver, wherein a separation wall is formed in the heat sink, and the light engine and the driver housing accommodating the LED driver are arranged on a first surface and a second surface of the separation wall opposite to each other, wherein the LED illuminating device further comprises a connector that presses the light engine on the first surface of the separation wall and is locked with the driver housing on the second surface of the separation wall. Various parts of the LED illuminating device according to the present invention do not need to be assembled together via traditional bolts or surface-mount technology such as welding, so that adverse influences caused by connection via welding or bolts on the parts of the LED illuminating device will be effectively avoided and the assembling becomes simpler.
According to a preferred solution of the present invention, the connector comprises a plate-like body having at least two hooks extending from the plate- like body, the driver housing has at least two openings for engaged with respective hook. As the connector and the driver housing are arranged on two opposite surfaces of the separation wall of the heat sink, the connector and the driver housing tightly hold the separation wall of the heat sink, and further the heat sink per se, therebetween after respective hook is engaged with respective opening, thereby, a stable fixed connection is established. Such simple engagement completely replaces the traditional assembling manner, and bolts or welding is not used.
Preferably, the hooks are arranged on a circumferential edge of the plate-like body, opposite to each other. Accordingly, the connector and the driver housing can be stably connected after respective hook is engaged with respective opening.
According to the present invention, at least two first through holes are opened in the separation wall, and respective hook is engaged with respective opening through respective first through hole. As the hook passes through the first through hole, the heat sink is assured to revolve in relation to the connector, which further holds the heat sink stably between the connector and the driver housing.
In one solution of the present invention, the light engine comprises a printed circuit board and an LED chip arranged on the printed circuit board. Preferably, a second through hole is opened in the separation wall, wherein a cut is formed on the printed circuit board, and an electrical pin of the LED driver passes through the cut via the second through hole. Further preferably, a light emergent opening for exposing the LED chip and a pin hole through which the electrical pin passes are opened in the plate-like body, an electrical rail is formed on an inner wall of the pin hole, a conductive contact is formed on the printed circuit board, and the electrical rail conductively contacts the conductive contact and the electrical pin, respectively. With this configuration, the connector, on one hand, serves the function of fixing the light engine and the driver housing, and on the other hand, serves the function of an electrical connection bridge between the light engine and the driver, wherein the electrical connection is realized via simple direct contact without welding, which significantly simplifies the manufacturing process and reduces the cost.
Preferably, a projecting portion is formed on the plate-like body at one side of the plate- like body away from the printed circuit board, and the pin hole is opened in the projecting portion. The projecting portion may envelop entirely the electrical pin passing through the cut of the printed circuit board so as to protect the same and prevent foreign matters from contacting the electrical pin, avoiding undesirable short circuit.
Advantageously, has a profile matching the printed circuit board, the circumferential edge of the plate-like body encloses a circumferential edge of the printed circuit board. The connector according to the present invention encloses entirely the printed circuit board, thus the printed circuit board is further protected against external interference.
According to the present invention, the connector is made from an insulating material. Of course, the connector also may be made from other materials including metals such as copper having a high coefficient of thermal conductivity, while the printed circuit board should be subjected to an insulation process for assuring the connector made from metals not to cause short circuit of the parts on the printed circuit board.
Brief Description of the Drawings
The accompanying drawings constitute a part of the present Description and are used to provide further understanding of the present invention. Such accompanying drawings illustrate the embodiments of the present invention and are used to describe the principles of the present invention together with the Description. In the accompanying drawings the same components are represented by the same reference numbers. As shown in the drawings :
Fig. 1 is an exploded view of an LED illuminating device of the present invention;
Fig. 2 is a schematic diagram of the assembled LED illuminating device assembled of the present invention;
Fig. 3a is a schematic diagram of one surface of a connector of the LED illuminating device of the present invention; Fig. 3b is another schematic diagram of the other surface of the connector of the LED illuminating device of the present invention;
Fig. 3c is a schematic diagram of a light engine of the LED illuminating device of the present invention;
Fig. 3d is a schematic diagram of a driver of the LED illuminating device of the present invention;
Fig. 3e is a schematic diagram of a heat sink of the LED illuminating device of the present invention; and
Fig. 3f is a schematic diagram of a driver housing of the LED illuminating device of the present invention.
Detailed Description of the Embodiments
Fig. 1 is an exploded view of an LED illuminating device of the present invention. As can be seen from Fig. 1, the LED illuminating device according to the present invention comprises a heat sink 1, a light engine 2, an LED driver 3 and a driver housing 4 for accommodating the LED driver 3. In the present embodiment, the LED illuminating device according to the present invention is configured as an LED retrofit lamp having the appearance and profile of the traditional incandescent lamp. It can be seen from Fig. 1 that a separation wall A is formed in the heat sink 1, and the light engine 2 and the driver housing 4 accommodating the LED driver 3 are arranged on a first surface and a second surface of the separation wall A opposite to the first surface, respectively. Besides, the LED illuminating device according to the present invention further comprises a connector 5 that presses the light engine 2 on the first surface of the separation wall A and is locked with the driver housing 4 on the second surface of the separation wall A. Fig. 2 is a schematic diagram of the assembled LED illuminating device of the present invention .
Fig. 3a - Fig. 3f are schematic diagrams of various parts of the LED illuminating device of the present invention. Fig. 3a is a schematic diagram of one surface of the connector 5, wherein the connector 5 comprises a plate-like body 5a having at least two hooks 6 extending from the plate-like body 5a, and the driver housing 4 shown in Fig. 3f has at least two openings 7 in cooperation with the hooks 6. In addition, it can be seen further from Fig. 3a that the plate- like body 5a has a projecting portion 5e at one side away from a printed circuit board 2a, and a pin hole 5c is formed in the projecting portion 5e. Besides, in the present embodiment, a light emergent opening 5b is formed in a center of the plate- like body 5a for exposing an LED chip 2c of the light engine 2 shown in Fig. 3c.
Fig. 3b is another schematic diagram of the other surface of the connector 5. As can be seen from Fig. 3b, the hooks 6 are arranged on opposite sides of a circumferential edge of the plate-like body 5a that has a profile matching the printed circuit board 2a, and a circumferential edge 5f extending towards a direction of the printed circuit board 2a is formed at one side of the plate- like body 5a facing the printed circuit board 2a and encloses a circumferential edge of the printed circuit board 2a. Besides, it can be seen from Fig. 3a and Fig. 3b that an electrical rail 5d is formed on an inner wall of the pin hole 5c and electrically contacts an electrical pin 3a of the LED driver 3 shown in Fig. 3d. Moreover, as can be seen from Fig. 3b, the electrical rail 5d extends onto a surface of the plate-like body 5a for allowing an electric contact between the electrical rail 5d and a conductive contact 2d on the printed circuit board 2a shown in Fig. 3c during assembling.
It can be seen from Fig. 3c that the light engine 2 comprises the printed circuit board 2a and the LED chip 2c arranged on the printed circuit board 2a, a cut 2b is formed on the printed circuit board 2a, and the conductive contact 2d is formed near the cut 2b.
Fig. 3e is a schematic diagram of the heat sink of the LED illuminating device of the present invention. As can be seen from Fig. 3e, the separation wall A is formed in the heat sink 1, and the light engine 2 and the driver housing 4 accommodating the LED driver 3 are arranged on the first surface and the second surface of the separation wall A opposite to each other, respectively. And further, two first through holes la are opened in the separation wall A, and respective hook 6 passes through the first through hole la to be engaged with respective opening 7. A second through hole lb is further opened in the separation wall A, and the electrical pin 3a of the LED driver 3 passes through the second through hole lb to insert into the cut 2b.
It can be seen from Fig. 3f that the openings 7 are opened in a housing wall of the driver housing 4. In practical assembling, the driver housing 4 is inserted into an accommodation portion of the heat sink 1 against the second surface of the separation wall A of the heat sink 1; and at the same time, the electrical pin 3a of the driver 3 passes through the second through hole lb of the separation wall A. Moreover, the light engine 2 is arranged on the separation wall A to align the cut 2b of the light engine 2 with the second through hole lb of the separation wall A. Thereafter, the connector 5 is coupled with the light engine 2 to expose the LED chip 2c of the light engine 2 from the light emergent opening 5b of the connector 5; respective hook 6 of the connector passes through respective first through hole la of the separation wall A and is engaged with respective opening 7, and the electrical pin 3a passes through the cut 2b to insert into the pin hole 5c. The electrical rail 5d is formed on the inner wall of the pin hole 5c and conductively contacts the conductive contact 2d and the electrical pin 3a, respectively, therefore, a reliable electrical connection is established between the driver 3 and the light engine 2.
The above is merely preferred embodiments of the present invention but not to limit the present invention. For the person skilled in the art, the present invention may have various alterations and changes. Any alterations, equivalent substitutions, improvements, within the spirit and principle of the present invention, should be covered in the protection scope of the present invention.
List of reference signs
1 heat sink
la first through hole lb second through hole
2 light engine
2a printed circuit board
2b cut
2c LED chip
3 LED driver
3a electrical pin
4 driver housing
5 connector
5a plate-like body
5b light emergent opening
5c pin hole
5d electrical rail
5e projecting portion circumferential edge opening
tion wall

Claims

Patent claims
1. An LED illuminating device, comprising a heat sink (1) , a light engine (2) , an LED driver (3) and a driver housing (4) for accommodating the LED driver (3), a separation wall (A) is formed in the heat sink (1) , and the light engine (2) and the driver housing (4) accommodating the LED driver (3) are arranged on a first surface and a second surface of the separation wall (A) opposite to the first surface, wherein the LED illuminating device further comprises a connector (5) that presses the light engine (2) on the first surface of the separation wall (A) and is locked with the driver housing (4) on the second surface of the separation wall (A) .
2. The LED illuminating device according to Claim 1, wherein the connector (5) comprises a plate-like body (5a) having at least two hooks (6) extending from the plate- like body (5a), the driver housing (4) has at least two openings (7) for engaged with respective hook (6) .
3. The LED illuminating device according to Claim 2, wherein the hooks (6) are arranged on a circumferential edge (5f) of the plate-like body (5a), opposite to each other.
4. The LED illuminating device according to Claim 3, wherein at least two first through holes (la) are opened in the separation wall (A), and respective hook (6) is engaged with respective opening (7) through respective first through hole (la) .
5. The LED illuminating device according to Claim 4, wherein the light engine (2) comprises a printed circuit board (2a) and an LED chip (2c) arranged on the printed circuit board (2a) .
6. The LED illuminating device according to Claim 5, wherein a second through hole (lb) is opened in the separation wall (A) , wherein a cut (2b) is formed on the printed circuit board (2a) , and an electrical pin (3a) of the LED driver (3) passes through the cut (2b) via the second through hole (lb) .
7. The LED illuminating device according to Claim 6, wherein a pin hole (5c) is opened in the plate-like body (5a) , an electrical rail (5d) is formed on an inner wall of the pin hole (5c) , a conductive contact (2d) is formed on the printed circuit board (2a) , and the electrical rail (5d) con- ductively contacts the electrical pin (3a) and the conductive contact (2d), respectively.
8. The LED illuminating device according to Claim 7, wherein a projecting portion (5e) is formed on the plate-like body (5a) at one side of the plate- like body (5a) away from the printed circuit board (2a) , and the pin hole (5c) is opened in the projecting portion (5e) .
9. The LED illuminating device according any one of Claims 3-8, wherein a light emergent opening (5b) is opened in the plate-like body (5a) for exposing the LED chip (2c) .
10. The LED illuminating device according any one of Claims 3-8, wherein the circumferential edge (5f) of the plate-like body (5a) encloses a circumferential edge of the printed circuit board (2a) .
11. The LED illuminating device according to any one of Claims 1-8, wherein the connector (5) is made from an insulating material .
PCT/EP2012/066811 2011-10-25 2012-08-30 An led illuminating device WO2013060510A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110328500.4 2011-10-25
CN201110328500.4A CN103075644B (en) 2011-10-25 2011-10-25 LED light device

Publications (1)

Publication Number Publication Date
WO2013060510A1 true WO2013060510A1 (en) 2013-05-02

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Application Number Title Priority Date Filing Date
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Country Status (2)

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CN (1) CN103075644B (en)
WO (1) WO2013060510A1 (en)

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EP2787798A3 (en) * 2013-04-04 2015-06-03 LG Innotek Co., Ltd. Lighting device
US9562679B2 (en) 2013-04-04 2017-02-07 Lg Innotek Co., Ltd. Lighting device
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