Source: https://patents.google.com/patent/JP2007087712A/en
Timestamp: 2019-12-05 15:10:48
Document Index: 241981674

Matched Legal Cases: ['art 4', 'art 3', 'art 4', 'art 4', 'art 22', 'art 23', 'art 4', 'art 4', 'art 18', 'art 18', 'art 17', 'art 8', 'art 24', 'art 23', 'art 4']

JP2007087712A - Lamp - Google Patents
JP2007087712A
JP2007087712A JP2005273759A JP2005273759A JP2007087712A JP 2007087712 A JP2007087712 A JP 2007087712A JP 2005273759 A JP2005273759 A JP 2005273759A JP 2005273759 A JP2005273759 A JP 2005273759A JP 2007087712 A JP2007087712 A JP 2007087712A
JP2005273759A
JP2007087712A5 (en
2005-09-21 Application filed by Toshiba Lighting & Technology Corp, 東芝ライテック株式会社 filed Critical Toshiba Lighting & Technology Corp
2005-09-21 Priority to JP2005273759A priority Critical patent/JP2007087712A/en
2007-04-05 Publication of JP2007087712A publication Critical patent/JP2007087712A/en
2007-04-05 Publication of JP2007087712A5 publication Critical patent/JP2007087712A5/ja
<P>PROBLEM TO BE SOLVED: To provide a lamp capable of effectively restraining temperature rise of a light source. <P>SOLUTION: The lamp 1 is provided with a metal hull member 2 housing a lighting circuit 31, a light source 11, a light source cover 21, and a hull shade 17. The hull member 2 is equipped with a light-source-mounting part 4 and a periphery part 3 integrated with the light-source-mounting part 4. The light source 11 having a circuit board 13 mounting a light-emitting element 14 is arranged in contact with the surface of the light-source-mounting part 4. The light source cover 21, translucent and formed of an electric insulating material, is equipped with a light distribution control part 22 opposed to the light-emitting element 14 and a contact part 23 in contact with the light source 11. The light source 11 is pressed onto the light-source-mounting part 4 with a screw 25 passing the light source cover 21 and the light source 11 covered with it to fix the light source cover 21 to the light-source-mounting part 4. The hull shade 17, made of metal, is connected to the hull member 2 in free heat transmission, and heat is also to be radiated from the hull shade 17. <P>COPYRIGHT: (C)2007,JPO&INPIT
The present invention relates to a lamp having a light source such as a point light source, for example, an LED (light emitting diode).
Conventionally, a plurality of heat radiation holes are provided in the lamp shade, a heat radiation cover is provided in contact with the inner surface of the lamp shade, a current conversion board on which the LED is attached is disposed in the heat radiation cover in contact with the heat radiation cover, 2. Description of the Related Art An LED type condensing illuminating lamp is known in which a condensing cover that covers an LED is disposed inside a heat dissipation cover, and a ring-shaped cover plate is coupled to an opening of the heat dissipation cover (see, for example, Patent Document 1).
In this LED type condensing illuminating lamp, since the heat dissipation cover is in contact with the current conversion board, the heat generated by the LED during lighting is conducted to the heat dissipation cover and discharged from the heat dissipation hole of the lampsade, thereby reducing the internal temperature. In addition, since the light collecting cover is provided, the light can be condensed.
Utility Model Registration No. 3099033 (paragraphs 0004-0007, FIGS. 1 to 3)
In the technology of Patent Document 1, since the heat radiating cover is covered with the lampsade, even if the lampsade has the heat radiating holes, the lamp sade suppresses the heat radiating from the heat radiating cover to the outside, and the lamp sade However, the heat transfer from the heat dissipation cover to the lamp shade is not good. Therefore, there is room for improvement in suppressing the temperature rise of the LED. Furthermore, in order to suppress the temperature rise of the LED, it is necessary that heat conduction from the LED to the heat radiation cover is good, but there is no description in Patent Document 1 for realizing this point.
The objective of this invention is providing the lamp | ramp which can suppress effectively the temperature rise of a light source.
The invention of claim 1 includes a light source mounting portion and a metal outer member having a peripheral portion integral with the light source mounting portion and accommodating a lighting circuit; and a circuit board on which a light emitting element is mounted. A light source disposed in the light source mounting portion; formed of a light-transmitting and electrically insulating material, and having a light distribution control portion facing the light emitting element and an abutting portion contacting the light source while avoiding the light emitting element. A light source cover that covers the light source and is screwed to the light source mounting portion; and a metal outer shade that forms a shade shape with an open bottom surface and is connected to the outer shape member so as to transfer heat. It is characterized by comprising.
In the present invention, the outer member and the metal forming the outer shell include iron and its alloys, metals having better thermal conductivity than these, such as copper and its alloys, and light metals lighter than iron and its alloys such as aluminum and its alloys. In addition to being usable, the outer member and the outer shade are preferably made of the same metal.
In the present invention, it is only necessary that the outer member and the outer shade be provided in a connection relationship that allows heat transfer. Therefore, it is preferable to integrally form the outer member and the outer shade to reduce the number of assembling steps. However, when the outer member and the outer shade are separate parts, the screw portions provided on them can be screwed together so that heat can be transmitted through the screwed portions. Providing a silicon-based adhesive having excellent thermal conductivity around the joint is preferable for heat transfer from the outer member to the outer shade. Further, the outer member and the outer shell which is a separate part may be connected using a silicon-based adhesive having excellent thermal conductivity without providing the screwing portion.
In the present invention, it is not limited to provide a colored or colorless protective layer that also serves as rust prevention, if necessary, on the inner surface of the outer shade, and if necessary, promotes rust prevention and heat radiation on the outer surface of the outer shade. The provision of a black paint layer is not limited. In addition, the outer shade does not necessarily have a light distribution control function, but when some light leaks through the light source cover toward the inner surface of the outer shade, it is a layer that reflects it. Can be provided as an auxiliary.
In the present invention, an element that converts electrical energy into light, for example, a light-emitting diode (LED) also referred to as a semiconductor light-emitting element, can be suitably used as the light-emitting element of the light source, but an electric luminescence element (EL element) is used. It is also possible to use it.
In the present invention, a light source cover that performs light distribution control by diffusing or condensing light emitted from light emitting elements such as LEDs by a light distribution control unit such as a lens can be formed of a transparent synthetic resin or transparent glass.
According to the first aspect of the present invention, the light source and the light source cover are attached to the outer member by screwing the light source mounted on the light source mounting portion of the outer member and the screw penetrating the light source cover mounted on the light source into the light source mounting portion. It can be installed in a state that prevents it from falling off. By this attachment, the contact portion of the light source cover presses the light source against the surface of the light source attachment portion, so that the light source can be sandwiched between the light source cover and the light source attachment portion. Thereby, since the light source and the light source mounting portion are connected in a heat transfer manner, the heat generated by the light emitting element can be efficiently conducted to the light source mounting portion. The heat of the light source mounting portion is conducted to the entire outer member and can be released to the outside without being blocked by other members from the outer surface of the peripheral portion exposed to the outside of the outer member. In addition, since the outer shell is thermally connected to the outer member on which the heat of the lighting circuit also acts, the heat of the outer member is transmitted to the outer shell, and other than the outer surface exposed to the outside of this outer shell It can be discharged without being obstructed by the member. Therefore, the temperature rise of the light source can be effectively suppressed.
The invention according to claim 2 is characterized in that the outer shade shade accommodates the light source cover, and an annular partition portion arranged so as to partition between the outer shade shade and the light source is provided integrally with the light source cover. It is said.
In the present invention, it is possible to protect the light source cover that covers the light source from being hit by other objects by the outer shade. Furthermore, even when the distance between the light source and the metal outer shade is close due to the annular section of the electrically insulating light source cover, the light source is not required to install a special insulating member or this member. It is possible to achieve electrical insulation between the metal and the metal outer shade.
According to the lamp of the invention of claim 1, the temperature rise of the light source can be effectively suppressed.
According to the lamp of the invention of claim 2, the light source cover can be protected, and electrical insulation between the light source and the metal outer shade can be achieved using the light source cover.
Reference numeral 1 in FIGS. 1 and 3 denotes a lamp. The lamp 1 includes a metal outer member 2, a light source 11, an outer shade 17, a light source cover 21, a lighting circuit 31, an insulating member 35, and a base 41.
The outer member 2 is made of, for example, an integrally formed product of aluminum. As shown in FIG. 3, the outer member 2 is formed of a cylindrical peripheral portion 3 and a circular light source mounting portion 4. The outer member 2 has a recess 5 inside thereof. The back end of the recess 5 is closed by a circular light source mounting portion 4. An annular stepped portion 2 a is formed at the back of the recess 5. The end of the recess 5 located on the side opposite to the light source mounting portion 4 is opened. An annular locking groove 3 b is formed on the inner peripheral surface of the opening edge 3 a of the peripheral portion 3. In the light source mounting portion 4, two through holes (not shown) are opened 180 degrees apart along the circumferential direction of the light source mounting portion 4.
The outer diameter of the peripheral portion 3 is, for example, substantially constant, and the outer peripheral surface 3c is used as a heat radiating surface. A circular groove 7 is provided at a portion where the peripheral portion 3 and the light source mounting portion 4 are integrally continuous. The groove 7 surrounds the light source mounting portion 4, and a screw portion 8 is formed on the inner surface thereof. For this reason, the screw portion 8 surrounds the light source mounting portion 4 when the lamp 1 is viewed from the front. The threaded portion 8 is formed by an internal threaded portion provided on the inner surface of the groove 7, in other words, the outer peripheral surface of the light source mounting portion 4. Instead, the groove facing the outer peripheral surface of the light source mounting portion 4. You may form with the internal thread part provided in the outer surface of 7.
The light source 11 has a circular shape, for example. The light source 11 is formed by arranging a circuit board 13 on the surface of a base 12 as shown in FIG. The base 12 is made of metal such as aluminum. On the circuit board 13, a plurality of light emitting elements 14 in the form of chips avoiding the central portion are mounted, for example, every 90 degrees (see FIG. 2). An LED is used for the light emitting element 14. The light emitting element 14 has a transparent protective glass. The surface of the circuit board 13 is insulated by an insulating layer by exposing a plurality of lands (not shown). As shown in FIG. 2, the light source 11 is provided with two wire passage portions 15 that are separated by 180 degrees along the circumferential direction of the light source 11. These electric wire passing portions 15 are opposed to and communicated with the through holes (not shown) of the light source mounting portion 4.
As shown in FIG. 3, the light source 11 is arranged on the light source mounting portion 4 with the back surface of the base 12 in contact with the surface of the light source mounting portion 4. The light source 11 may be disposed on the light source mounting portion 4 with a heat transfer sheet (not shown) interposed between the light source mounting portion 4 and the base 12. In this case, as the heat transfer sheet, a sheet made of an elastic material having excellent heat conductivity, for example, a sheet made of silicon resin, can be preferably used, and the heat transfer sheet is preferably larger than the light source 11.
The outer shell 17 is made of the same metal as the outer member 2, and is formed separately from the outer member 2, for example. By making the outer shade 17 separate from the outer shell 2, the light source 11 and the light source cover 21 can be attached to the light source attachment portion 4 prior to the attachment of the outer shade 17. It is preferable in that it does not become.
The outer shade 17 is circular as shown in FIG. 2 and gradually increases in diameter from the upper end to the lower end as shown in FIG. 3, and the lower end is opened. The inner surface and the outer surface of the outer shade 17 are metal ground surfaces that form the outer shade. The axial length of the outer shade 17 is larger than the thickness of the light source 11 and the light source cover 21, so that the outer shade 17 can accommodate the light source 11 and the light source cover 21.
A screw portion 18 is provided on the upper end portion 17 a of the outer shade 17. The screw part 18 consists of a female screw part, for example. In addition, what is necessary is just to let the thread part 18 be the external thread part formed in the outer peripheral surface of the upper end part 17a, when the thread part 8 of the outer shell member 2 is an internal thread part. The outer shade 17 is connected to the outer member 2 by screwing the screw portion 18 into the screw portion 8 of the outer member 2. The threaded portion between the screw portions 8 and 18 functions as a heat conduction path from the outer member 2 to the outer shade 17. After screwing, the groove 7 may be filled with a silicon-based adhesive, and the heat conduction path from the outer member 2 to the outer shade 17 may be formed through this adhesive.
The light source cover 21 disposed so as to cover the light source 11 is an integrally molded product of an electrically insulating transparent synthetic resin and has a larger diameter than the light source 11. The light source cover 21 is attached to the light source attachment portion 4 with a screw 25 that passes through the center portion of the light source cover and the center portion of the light source 11 and is screwed into the screw hole 4 a of the light source attachment portion 4. The screw 25 may be made of metal or synthetic resin.
As shown in FIG. 3, the light source cover 21 includes a light distribution control unit 22, a contact unit 23, and an annular partition unit 24.
The same number of light distribution control units 22 as the light emitting elements 14 are provided. These light distribution control units 22 are individually opposed to the light emitting elements 14 as shown in FIG. 2 and cover the light emitting elements 14 (see FIG. 3). Each light distribution control unit 22 is formed to function as, for example, a lens in order to control the light distribution of the light emitted from the light emitting element 14. The peripheral surface 22a of the light distribution control unit 22 is preferably a total reflection surface.
The abutting portion 23 is a portion that contacts the light source 11 while avoiding the light distribution control portion 22 and the light emitting element 14, and is formed, for example, continuously in a ring around the periphery of the light source cover 21. However, a plurality of contact portions 23 may be provided discontinuously in the circumferential direction. The contact portion 23 is pressed against the peripheral surface of the light source 11 by the tightening force of the screw 25.
The annular partition part 24 is located on the outermost periphery of the light source cover 21 and is integrally provided outside the contact part 23. The annular partition 24 is larger than the diameter of the light source 11 and is provided closer to the outer surface of the light source mounting portion 4 than the contact portion 23, and partitions between the small-diameter end of the outer shell 17 and the peripheral surface of the light source 11. Are arranged as follows.
A plurality of concave portions are provided on one of the annular partitioning portion 24 and the light source mounting portion 4, and the same number of convex portions as the concave portions are provided on the other side. On the other hand, the light source cover 21 having the annular partition portion 24 may be prevented from rotating. In this case, it is possible to prevent the light source cover 21 from being rotated by the screw 25 at the end of tightening of the screw 25. Thereby, the arrangement of the light distribution control unit 22 with respect to the light emitting element 14 can be maintained in an appropriate state, and the light source 11 is prevented from being rotated through the light source cover 21 with respect to the light source mounting unit 4. This is preferable in that a load can be prevented from being applied to a soldered connection portion between 11 and an insulating coated wire (not shown).
The lighting circuit 31 is for lighting the light emitting element 14 of the light source 11 and is unitized by mounting various circuit components 33 on a circuit board 32 as shown in FIG. The lighting circuit 31 has two insulated wires (not shown) for electrical connection to the light source 11.
In the concave portion 5 of the outer member 2, an insulating member 35 formed in a cup shape is accommodated in a state separated from the light source mounting portion 4 by being positioned at the stepped portion 2 a. The insulating member 35 is formed of a synthetic resin such as polybutylene terephthalate. The lighting circuit 31 is accommodated inside the insulating member 35. Since the lighting circuit 31 is accommodated in the recess 5 in this way, it is not necessary to secure a space for arranging the lighting circuit 31 in the axial direction with respect to the outer member 2, and the axial length of the lamp 1 can be made compact. .
The insulating member 35 provides electrical insulation between the lighting circuit 31 and the metal outer member 2. Electric wire through holes (not shown) are formed at two locations on the wall portion 35a of the insulating member 35 facing the light source mounting portion 4. The insulation covered electric wire of the lighting circuit 31 is passed through the electric wire through hole, the through hole of the light source mounting portion 4, and the electric wire through portion 15 of the light source 11, and is soldered to a land included in the circuit board 13 of the light source 11.
As shown in FIGS. 1 and 3, for example, a G4 type is used for the base 41. A base 41 detachably connected to a lamp socket (not shown) is connected to the opening edge 3 a side of the outer member 2 via a connecting member 42 in order to supply power to the lighting circuit 31. The lamp 1 is usually attached to the lamp socket with the base 41 facing upward as shown in FIGS. The connecting member 42 is made of an insulating material such as synthetic resin, such as polybutylene terephthalate, and is connected to the opening edge 3a.
For this connection, an annular locking projection 42 a is formed on the outer periphery of the distal end portion of the coupling member 42. The base 41 and the outer member 2 are connected by fitting and locking the locking protrusions 42 a into the locking grooves 3 b of the outer member 2. The connecting member 42 electrically and thermally insulates between the base 41 and the outer member 2.
The lamp 1 is assembled in the following procedure.
First, the insulating member 35 and the lighting circuit 31 are accommodated in the recess 5 of the outer member 2, and the two insulation-coated wires of the lighting circuit 31 are passed through the through holes of the light source mounting portion 4.
Thereafter, the base 12 is brought into contact with the surface of the light source mounting portion 4 to place the light source 11, and two insulation-coated wires are passed through the wire passage portions 15 of the light source 11, respectively. In this state, the end portion of the core wire peeled off of the insulation-coated electric wire is soldered to the land of the circuit board 13 that the light source 11 has.
Next, the light source cover 21 is placed so as to cover the light source 11. In this state, the screws 25 are passed through the central portions of the light source cover 21 and the light source 11 and screwed into the screw holes 4a of the light source mounting portion 4 to fix the light source cover 21. Thereby, the optical axis of the light emitting element 14 of the light source 11 and the optical axis of the light distribution control unit 22 of the light source cover 21 are matched. At the same time, the contact portion 23 of the light source cover 21 hits the periphery of the surface portion of the circuit board 13 of the light source 11, and the light source cover 21 and the light source mounting portion 4 sandwich the light source 11. Thereby, the base 12 of the light source 11 is pressed in a state of being in close contact with the surface of the light source mounting portion 4, and heat transfer from the light source 11 to the light source mounting portion 4 is improved. Moreover, the completion of this screwing ensures that the light source cover 21 and the light source 11 are prevented from falling off, and the annular section 24 of the light source cover 21 is disposed so as to cover the entire circumference of the light source 11.
Thereafter, the threaded portion 18 of the upper end portion 17 a of the outer shell 17 is screwed into the screw portion 8 of the outer member 2, and the reflective shade 17 is connected to the outer member 2. As a result, the outer shade 17 accommodates the entire light source cover 21 covering the light source 11 inside. In this accommodated state, the light source cover 21 does not protrude from the lower end opening of the outer shade 17.
Finally, the base 41 is attached to the outer member 2 via the connecting member 42 to complete the assembly of the lamp 1.
When the lamp 1 is turned on, the light emitting element 14 made of LED generates heat. This heat is efficiently conducted from the base 12 of the light source 11 to the light source attachment portion 4 to which the base 12 is pressed, and then conducted to the peripheral portion 3 of the outer member 2 formed integrally with the light source attachment portion 4. The outer peripheral surface 3c of the peripheral portion 3 is discharged to the outside. In this case, the thermal resistance from the light source mounting portion 4 to the peripheral portion 3 is small, the heat conduction is good, and the entire outer peripheral surface 3c of the peripheral portion 3 is exposed, so that other members are obstructed. Can be dissipated without being distracted.
In addition, since the metal outer shade 17 is connected to the light source mounting portion 4 of the outer member 2 in a heat transfer manner, the heat dissipation area is increased by the outer shade 17. Since the entire outer surface of the outer shade 17 is exposed, the heat transmitted from the light source mounting portion 4 to the outer shade 17 can be released to the outside without being obstructed by other members.
Therefore, the cooling performance of the light source 11 is good, the temperature of the light emitting element 14 of the light source 11 is prevented from rising abnormally, and the light emission efficiency and the life of the light emitting element 14 can be suppressed from decreasing.
In addition, since the outer shade 17 whose bottom surface is opened accommodates the light source cover 21 that covers the light source 11, the outer shade 17 protects the light source cover 21 from being hit by other sources when the lamp 1 is handled. it can.
Further, the light source cover 21 is electrically insulative, and the annular partition 24 is disposed between the light source 11 and the metal outer shade 17 so as to partition them. For this reason, even when the distance between the light source 11 and the inner surface of the metal outer shell 17 is close, such as when the lamp 1 is reduced in the radial direction, a special insulating member or this member is attached. The electrical insulation between the light source 11 and the metal outer shade 17 can be achieved by using the light source cover 21 without requiring labor or the like.
FIG. 4 shows a second embodiment of the present invention. Since 2nd Embodiment is the same as 1st Embodiment except the matter demonstrated below, the same code | symbol as the applicable part of 1st Embodiment is attached | subjected to the same part, and description is abbreviate | omitted.
In the second embodiment, the outer shade 17 is formed integrally with the outer member 2. For this reason, the thermal resistance from the light source attachment part 4 of the outer shell member 2 to the outer shell shade 17 is small, which is excellent in that heat can be transferred well. Furthermore, since it is integrated, the number of parts is reduced, so that the number of assembling steps can also be reduced. In the second embodiment, a GU10 type is used for the base 41. Except for the items described above, the same items as those in the first embodiment are included, including items not shown in FIG.
Therefore, the lamp 1 of the second embodiment can also solve the problem of the present invention.
The side view which shows the lamp | ramp which concerns on 1st Embodiment of this invention. The front view which shows the lamp | ramp of FIG. FIG. 2 is an enlarged side view showing a part of the lamp of FIG. The expanded side view which shows the lamp | ramp which concerns on 2nd Embodiment of this invention, and shows a part in cross section. FIG.
DESCRIPTION OF SYMBOLS 1 ... Lamp, 2 ... Outer member, 3 ... Surrounding part of outer member, 4 ... Light source attachment part of outer member, 4a ... Screw hole, 8 ... Screw part of outer member, 11 ... Light source, 12 ... Base of light source, 13 DESCRIPTION OF SYMBOLS ... Circuit board of light source, 14 ... Light emitting element of light source, 21 ... Light source cover, 22 ... Light distribution control part of light source cover, 23 ... Contact part of light source cover, 24 ... Ring partition part of light source cover, 25 ... Screw,
A light source mounting portion and a metal outer member having a peripheral portion integral with the light source mounting portion and accommodating a lighting circuit;
A light source having a circuit board on which a light emitting element is mounted and disposed on the light source mounting portion;
The light source is formed of a light-transmitting and electrically insulating material, has a light distribution control portion facing the light emitting element, and a contact portion that contacts the light source while avoiding the light emitting element, and covers the light source. A light source cover screwed to the mounting;
A metal outer shade that has a shape of a shade with an open bottom surface and is connected to the outer shape member for heat transfer;
The lamp characterized by comprising.
The said outer shade accommodates the said light source cover, The cyclic | annular division part arrange | positioned so that it may partition between this outer shade and the said light source was provided integrally in the said light source cover. Lamp.
JP2005273759A 2005-09-21 2005-09-21 Lamp Pending JP2007087712A (en)
JP2005273759A JP2007087712A (en) 2005-09-21 2005-09-21 Lamp
JP2007087712A true JP2007087712A (en) 2007-04-05
JP2007087712A5 JP2007087712A5 (en) 2007-04-05
ID=37974488
JP2005273759A Pending JP2007087712A (en) 2005-09-21 2005-09-21 Lamp
JP (1) JP2007087712A (en)
JP2010034546A (en) * 2008-06-27 2010-02-12 Toshiba Lighting & Technology Corp Light-emitting element lamp and luminaire
JP2011023194A (en) * 2009-07-15 2011-02-03 Jimbo Electric Co Ltd Led lighting system
JP2011154832A (en) * 2010-01-26 2011-08-11 Toshiba Lighting & Technology Corp Illumination apparatus
JP2012003999A (en) * 2010-06-18 2012-01-05 Panasonic Electric Works Co Ltd Light-emitting unit
JP2012059579A (en) * 2010-09-09 2012-03-22 Sharp Corp Lighting system
US8727564B2 (en) 2010-01-26 2014-05-20 Toshiba Lighting & Technology Corporation Illumination apparatus
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JPH0399033U (en) * 1990-01-25 1991-10-16
JP2003109415A (en) * 2001-10-01 2003-04-11 Matsushita Electric Ind Co Ltd Lighting system and its manufacturing method
JP2003157710A (en) * 2001-11-26 2003-05-30 Kyoto Denkiki Kk Light source for light guide
JP2004221042A (en) * 2003-01-13 2004-08-05 Ccs Inc Spot illumination device using power led
JP2004528698A (en) * 2001-05-26 2004-09-16 ゲルコアー リミテッド ライアビリティ カンパニー High power led module for illumination spot
JP2005038798A (en) * 2003-07-18 2005-02-10 Matsushita Electric Ind Co Ltd Lighting device and lamp module
JP2005093097A (en) * 2003-09-12 2005-04-07 Sanyo Electric Co Ltd Lighting system
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