JP5600936B2 - LED lighting device - Google Patents

Description

  The present invention relates to an LED lighting device using an LED (light emitting diode) as a light source.

  In recent years, features such as low power consumption and long life of LEDs have been evaluated, and LED lighting devices using LEDs as light sources have been developed. In the near future, many of the existing incandescent bulbs and fluorescent lamps for home use It is also expected that it will be replaced by an LED lighting device.

Now, in order to ensure the same brightness as existing incandescent bulbs and fluorescent lamps for home use, it is necessary to mount a plurality of LEDs. Has become one of the important issues in the development of.
At the same time, it is desired to develop an LED lighting device that can be efficiently processed and assembled for mass production.

In addition to Patent Documents 1 to 4 shown below, there are many patent documents as patent documents disclosing conventional LED lighting devices.
The illumination device disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2008-293375) includes a heat pipe inserted into a hollow portion of a heat exchange base having an LED array surface on the outer surface, and a heat dissipation module extrapolated to the heat pipe. The heat dissipation module includes a plurality of fins that are spread radially from the hollow portion.

  The illuminating device disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 2008-293753) includes a heat dissipating part that dissipates heat from the LED of the light source unit, and the heat dissipating part includes corrugated heat dissipating fins.

  The lighting device disclosed in Patent Document 3 (Japanese Unexamined Patent Application Publication No. 2009-4130) dissipates heat from the LED and / or the drive circuit unit in order to solve the problem that the LED generates heat during use. The heat radiating portion includes a fixed cylinder having a housing portion for housing the drive circuit portion, and radially disposed heat radiating fins fixed to the outside of the fixed tube.

  The lighting device disclosed in Patent Document 4 (Japanese Patent Laid-Open No. 2009-21264) has an object to provide a highly reliable lighting device having excellent heat dissipation characteristics, and a plurality of light emitting diodes are mounted on one surface. A support is provided on the other surface of the base, and a plurality of heat radiation fins are radially extended outward from the support.

  However, the conventional LED lighting devices disclosed in those patent documents are not yet suitable for mass production and are not satisfactory in terms of heat dissipation measures.

JP 2008-243780 A JP 2008-293753 A JP 2009-4130 A JP 2009-21264 A

  Although the said patent document 2 is equipped with the several radiation fin, since this is formed in the corrugated shape, the flow of air is formed along the channel | path formed between the several radiation fin, and a heat radiation characteristic is provided. It is difficult to expect the effect of improvement.

  In this regard, in the techniques proposed in Patent Documents 1, 3 and 4, it is proposed to dispose the heat dissipating fins radially. In particular, in Patent Document 4, “a plurality of light-emitting elements provided on one surface of a substrate” is proposed. At this time, the heat generated by the plurality of light emitting elements is conducted to the base and the support and is dissipated through the plurality of heat radiating fins. In this case, an air flow is formed along the passage formed between the plurality of heat dissipating fins. The improvement of heat dissipation characteristics due to the flow of air is actively described.

  However, starting from Patent Document 4, the center side of the radiating fins arranged radially is connected to a cylindrical support, and the upper and lower ends of the support are closed. For this reason, the said support body was filled with the gas heated with the heat | fever of the light emitting element, and there existed a subject that this could not be discharged | emitted efficiently.

  Therefore, the present invention pays attention to such a problem on its own, and can improve the heat dissipation characteristics by enabling not only heat dissipation by mere heat dissipation fins but also positive discharge of heated gas. An object of the present invention is to provide an LED lighting device that can be efficiently processed and assembled.

In order to achieve the above object, an LED illumination device of the present invention is an LED illumination device comprising at least a substrate on which an LED is mounted, and a heat radiator having a surface in contact with the back surface of the substrate,
The heat dissipating body includes a radial heat dissipating fin portion including a plurality of heat dissipating fins extending radially from the back surface of the surface in contact with the substrate, and the radial heat dissipating fin portion extending from the back surface of the surface in contact with the substrate. The radial radiating fin portion and the cylindrical radiating fin portion composed of at least one cylindrical body arranged concentrically with the radial radiating fin portion,
Furthermore, it is provided with a ventilation path that allows gas to flow inside and outside the cylindrical body that constitutes the cylindrical radiation fin portion.

  In the LED lighting device of the present invention having such a configuration, the heat generated by the LED is transmitted from the substrate to the surface of the radiator that contacts the back surface of the substrate, and this is transmitted to the radial radiator fin portion and the cylindrical radiator fin portion of the radiator. It will be guided and released into the atmosphere. In particular, the LED lighting device of the present invention includes a ventilation path that allows gas flow inside and outside the cylindrical body constituting the cylindrical radiating fin portion, and is thus emitted from the LED and led to the radiating fin. Heat is released into the atmosphere using the entire surface of all the radiating fins, so that efficient heat dissipation can be performed.

  In order to improve the heat conduction efficiency of the LED transmitted to the substrate, the radiator preferably has a flat surface that allows the flat back surface of the substrate to come into surface contact, and the back surface of the substrate is in close contact with the flat surface. By making it contact, the heat conduction efficiency between a board | substrate and a thermal radiation body can be improved. Further, in order to efficiently guide the heat transferred from the substrate to each heat dissipating fin, it is desirable that the heat dissipating member be formed as a seamless integral from the surface where the back surface of the substrate contacts to the fin. This is because if there is a gap between the components or the contact area between the members is small, the heat conduction efficiency is poor and a sufficient heat dissipation effect cannot be obtained.

  Further, in the LED lighting device according to the present invention, the radial radiating fin portion is a part of a peripheral surface of a cylindrical body in which a radiating fin extending from a back surface of a surface in contact with the substrate is concentric with the cylindrical radiating fin portion. It can also be formed by extending radially from the outer peripheral surface that is notched.

  The radial heat dissipating fin portion is composed only of a substantially rectangular heat dissipating fin extending from the back surface of the surface in contact with the substrate, and substantially rectangular heat dissipating fins are arranged radially at a predetermined interval, It is also possible to form a cylindrical body in which a part of the cylinder is cut out.

  As a shape in which a part of the circumferential surface of the cylindrical body is cut out, the circumferential surface of the cylindrical body is cut at a predetermined interval in the circumferential direction in addition to a shape in which the circumferential surface of the cylindrical body is cut out at a predetermined interval in the axial direction. A notched shape may be used. In particular, when the peripheral surface of the cylindrical body is cut out in the axial direction, the peripheral surface of the cylindrical body that is partially cut out has an approximately circular arc shape, which extends from the back surface of the surface in contact with the substrate.

  By cutting out a part of the peripheral surface of the cylindrical body integrated with the radiation fins arranged radially, the cut-out portion becomes a ventilation passage that allows gas flow inside and outside the cylindrical body. It is possible to dissipate heat from the inner peripheral surface of the material, and the heat dissipation effect can be enhanced.

Further, in the LED lighting device according to the present invention, all the cylindrical bodies constituting the concentric cylindrical radiating fin portion can be formed lower than the radial radiating fin portion . If formed in this way, even when a power supply connection unit that supplies power to the lighting circuit is provided at the end of the radiator that is opposite to the surface that contacts the back surface of the substrate, the power supply connection unit Since a gap can be secured between all the cylindrical bodies constituting the cylindrical radiating fin portion , this gap can be used as an air passage. As described above, this air passage forms all the cylindrical bodies lower than the radial heat dissipating fin portions , that is, forms a short extension length from the back surface of the surface in contact with the substrate, and a part of the cylindrical body. May be cut out, or a hole or the like penetrating the peripheral surface may be provided.

  Further, in the LED lighting device according to the present invention, a plurality of LEDs are annularly arranged on the surface of the substrate, and the radial heat dissipating fin portion extends from the back surface of the surface in contact with the region where the LEDs are disposed on the substrate. Can be made. By providing the radial heat dissipating fin portion on the projection of the LED, which is a heat generating portion, the heat of the LED quickly propagates to the radial heat dissipating fin portion, and heat can be efficiently radiated.

  Further, in the LED lighting device according to the present invention, a lighting circuit component for lighting the LED is mounted on the substrate, and an end portion of the radiator that is opposite to the surface that contacts the back surface of the substrate. Is provided with a power connection unit for supplying power to the lighting circuit, and the power connection unit includes an insulating base connected to the heat dissipator and a conductive screw threaded into the base. A base made of a conductive metal, the base being formed in a shape and dimension suitable for a light bulb socket standardized for indoor lighting, and electrically connected to the lighting circuit component through a conductor. Can be configured.

Since the light bulb socket is standardized for indoor lighting, it is configured so that it can be attached to the light bulb socket, and a power connection unit is provided to supply power to the LED lighting circuit. is there. In particular, since such a power connection unit is provided at an end portion of the radiator, unless accompanied by the above-mentioned configuration of the present invention, an end portion of at least the cylindrical heat radiating fin portion is closed, the inner circumferential surface thereof It is conceivable that sufficient heat dissipation is not achieved. Therefore, in this invention, the ventilation path which enables the gas distribution in the inside and outside of the cylindrical body which comprises the edge part of this cylindrical radiation fin part is provided, and also enables the heat radiation from the internal peripheral surface of the said cylindrical body. Is.

  Further, in the LED lighting device according to the present invention, a lighting circuit component for lighting the LED is mounted on the substrate, and an end portion of the radiator that is opposite to the surface that contacts the back surface of the substrate. Is provided with a power supply connection unit for supplying power to the lighting circuit, and the power supply connection unit includes an insulating terminal block connected to the radiator and a terminal provided on the terminal block. And the terminal is electrically connected to the lighting circuit component via a conductor.

Such an LED lighting device has a configuration particularly suitable for use as a downlight, and a power connection unit is an insulating terminal block connected to a radiator, and a terminal provided on the terminal block. It has. Even in this LED lighting device (LED downlight lighting device), by providing a ventilation path that allows gas to flow inside and outside the cylindrical body constituting the end of the cylindrical radiating fin portion , Heat dissipation from the inner peripheral surface of the body is also possible, and the heat dissipation effect can be improved.

And the LED lighting apparatus concerning this invention can also be comprised as follows.
(1) Further, an insulating fastening member is provided that applies axial pressure to the substrate to bring the substrate into close contact with the heat radiator.
(2) comprising a light diverging member disposed at a position facing the surface of the substrate;
The light diffusing member includes a transmission part for diffusing the light emitted by the LED facing the LED mounted on the surface of the substrate, and a contact part for pressing the surface of the substrate,
The light diffusing member is configured to be fastened by the fastening member that penetrates the substrate and is fastened to the heat radiating body, and the contact portion presses the surface of the substrate with the fastening force.
(3) A lens is formed in the transmission part, and the lens is provided to face the LED mounted on the surface of the substrate.
(4) The substrate is formed in a disk shape, the lighting circuit component is mounted on the center of the surface, and the LEDs are arranged radially around the periphery,
The fastening member includes a fastening seat disposed on the front surface side of the substrate, and a leg portion extending from the back surface of the fastening seat,
The fastening seat is provided at a position facing the lighting circuit component inside the LED array, and a light diffuser is incorporated on the surface of the fastening seat.
(5) The fastening seat of the fastening member is provided with a locking claw protruding from the surface,
The light diffuser is configured to be mounted on the surface side of the fastening seat via the locking claw.
(6) A hood fitting portion extending in the axial direction is formed on the peripheral edge of the surface with which the back surface of the substrate is in contact, and the hood periphery that covers the front side of the substrate is fitted into the hood fitting portion.
(7) The heat radiator is manufactured by aluminum die casting.

According to the LED lighting device of the present invention, it is possible to efficiently guide the heat generated in the LED to the radiator and dissipate it, and in the radiator, to efficiently dissipate heat by using the radiation fins without waste. Can do.
In addition, by integrally forming the heat radiating body by aluminum die casting, etc., the number of parts can be greatly reduced, and it is possible to efficiently process and assemble.

It is a disassembled perspective view of the LED lighting apparatus which concerns on 1st Embodiment of this invention. It is a figure which shows the LED illuminating device which concerns on 1st Embodiment of this invention, (a) is AA 'arrow sectional drawing which shows the state which exposed LED except the hood, the fastening member, and the light divergence member, (B) is a plan view, (c) is a front view, (d) is a sectional view taken along the line DD ′, and (e) is a rear view. It is a figure which shows the assembly procedure of the LED lighting apparatus which concerns on 1st Embodiment of this invention, (a1) (b1) (c1) is a top view, (a2) (b2) (c2) is a longitudinal cross-sectional view, (a3 ) Is a bottom view, and (a4) is a sectional view taken along the 4-4 'arrow. It is a figure which shows the assembly procedure of an LED illuminating device following FIG. 3, (d1) (e1) is a top view, (d2) (e2) is a longitudinal cross-sectional view. It is a figure which shows the gas flow in the LED illuminating device which concerns on 1st Embodiment of this invention, (a) is a perspective view of the state which removed the power supply connection part unit, (b) is a longitudinal cross-sectional view, (c) is It is a bottom view of the state which removed the power supply connection unit. It is a bottom view which shows the heat radiator concerning other embodiment in the LED lighting apparatus which concerns on 1st Embodiment of this invention. It is a disassembled perspective view of the LED lighting apparatus which concerns on 2nd Embodiment of this invention. (A) is a top view of the LED illuminating device which concerns on 2nd Embodiment of this invention, (b) is a bottom view similarly, (d) is sectional drawing similarly.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First Embodiment]
1 to 5 are diagrams for explaining an LED lighting device according to a first embodiment of the present invention.
As shown in FIGS. 1 and 2, the LED lighting device according to this embodiment includes a substrate 10, a radiator 30, a power connection unit 40, a light diffusing member 50, a light diffusing member 60, a fastening member 61, and a hood 70. It is the structure containing each of these component parts.

The substrate 10 is formed by forming a wiring circuit pattern on the surface of a disk-shaped resin insulating substrate, and the lighting circuit component 11 is mounted at the center of the surface as shown in FIG. 3 (b1). Further, a plurality of LEDs 12 are radially arranged around the periphery. The lighting circuit component 11 is various electronic components that constitute a circuit for lighting the LED 12. Further, on the back side of the substrate 10, lead wires 13 (two lead wires 13 in the present embodiment) for supplying power from the outside to the lighting circuit extend.
The back surface of the substrate 10 is formed as a flat surface, and comes into surface contact with the surface of the substrate receiving surface 20 in the radiator 30 as will be described later.

As is well known, the LED 12 generates heat during lighting. Since a plurality of LEDs 12 are mounted on the substrate 10, the temperature on the substrate 10 becomes high due to heat generated from these LEDs 12. Thus, although the substrate 10 is not an essential requirement of the present invention, it is preferable to use an insulating and high thermal conductivity substrate such as an aluminum base substrate. The aluminum base substrate has a structure in which a copper foil circuit is formed on an aluminum plate via an insulating layer, and an epoxy insulating layer containing a highly thermally conductive filler efficiently transfers the heat on the mounting surface to the aluminum plate side. Has a function to escape (Reference: Riken Electric Cable Co., Ltd. website)
http://www.rikensen.co.jp/Riken/kakou/alumikiban.htm).

The heat radiating body 30 to be described later includes a substrate receiving surface 20 for accommodating the substrate 10, and the substrate 10 is disposed on the surface thereof (the upper surface of FIG. 3 (a 1)). Here, the surface of the substrate receiving surface is a flat surface, and the back surface of the substrate 10 is in surface contact. As shown in FIGS. 1 and 2B, the substrate 10 is fastened to the substrate receiving surface 20 by the fastening member 61 and the first spring washer-attached screw 111 together with the light diffusing member 50. As described above, the substrate 10 and the substrate receiving surface 20 fastened by the fastening member 61 and the first spring washer-attached screw 111 are in close contact with each other, and heat generated from the LED 12 is transferred from the substrate 10 to the substrate receiving surface. 20 can be transmitted efficiently.
In addition, from the back surface of the board | substrate receiving surface 20 (lower surface of FIG.3 (b2)), the radial radiating fin part 31 and the cylindrical radiating fin part 35 which comprise the heat radiator 30 with the said board | substrate receiving surface 20 are extended. .

  As shown in FIGS. 1 to 5, the radiator 30 includes a substrate receiving surface 20 in contact with the back surface of the substrate on which the LED is mounted, and a substantially rectangular heat radiation fin 32 extending from the back surface of the substrate receiving surface 30. A radial heat dissipating fin portion 31 arranged radially with the center of the back surface as an axis, and a concentric circle with the radial heat dissipating fin portion on the inner side of the radially dissipating fin portion extending from the back surface of the substrate receiving surface 30 and arranged radially. And a cylindrical heat dissipating fin portion 35 composed of a plurality of cylindrical bodies, which are integrally formed by aluminum die casting.

  As shown in FIG. 1 and FIG. 3 (a1), the board receiving surface 20 has a screw hole 21 for screwing the fastening member 61 onto the board receiving surface 20 of the radiator 30 with the first spring washer-attached screw 111. A through hole 22 is provided for guiding the two conductive wires 13 extending from the back side of the substrate 10 to the power supply connection unit 40. Further, a stepped portion 23 and a groove portion 24 are formed on the substrate receiving surface 20 to guide the two conductive wires 13 extending from the substrate to the through hole 22. The step portion 23, the groove portion 24, and the through hole 22 are connected as shown in FIG. 3 (a4), and the groove portion 24 is located at the soldering position on the substrate of the through hole 22 and the two conductive wires 13 extending from the substrate. Functions as an adjustment of the displacement. That is, the groove portion 24 functions as a groove for holding the two conductive wires 13 extending from the substrate.

  In the present embodiment, the cylindrical heat radiating fin portion 35 extending from the back surface of the substrate receiving surface 20 of the heat radiating body 30 is configured by concentrically arranging the three cylindrical bodies 36, 37, and 38 while ensuring a certain gap. The gap between the cylindrical bodies can function as a gas ventilation path. Further, the three cylindrical bodies 36, 37, and 38 constituting the cylindrical radiating fin portion 35 are formed so that the axial center length thereof is shorter than the length in which the radial radiating fin portion 31 extends. In particular, the outermost cylindrical body is the first cylindrical body 36, the cylindrical body existing inside is the second cylindrical body 37, and the cylindrical body existing inside the second cylindrical body is the third cylindrical body. In the case of the body 38, at least the second cylindrical body 37 is formed with a shorter axial center length than the first cylindrical body 36. In other words, the first cylindrical body 36 present on the outermost side is formed to have the same axial length as or longer than the cylindrical body existing on the inner side. Thereby, it can avoid as much as possible that the conducting wire 13 which passes through the inside 22 of a through-hole is exposed outside. In this way, by forming all the cylindrical bodies to be shorter than the radial heat dissipating fin portions 31, a gap is formed on the tip side of each cylindrical body 36, 37, 38, and this gap is formed inside and outside each cylindrical body. It can function as an air passage that enables gas flow. As a result, the entire surface of each cylindrical body can contribute to heat dissipation, and the heat dissipation efficiency can be greatly improved.

  Further, the radial radiating fin portion 31 extending from the back surface of the substrate receiving surface 20 in the radiating body 30 is concentric with the cylindrical radiating fin portion 35 and cuts three places on the circumferential surface of the cylindrical body in the axial direction at equal intervals. A substantially rectangular heat dissipating fin 31 is radially extended from the outer peripheral surface of the arc-like shape 33 that is lacking. The radial radiating fin portion 31 formed in this manner is a portion that is notched between the radial radiating fin modules when the radiating fin 32 extending from one arc shape 33 is a radial radiating fin module. A gap corresponding to the width of the gap is generated, and this can function as a ventilation path.

  Furthermore, the heat radiating body in the present invention includes any one of the first cylindrical body 36, the second cylindrical body 37 and the third cylindrical body 38, or the fastening hole portion 124a, and three radial radiating fin portions at equal intervals. Only a width slightly wider than the width of the portion cut out in the axial direction can be formed to have an axial length equivalent to that of the radial radiating fin portion. If formed in this way, the two conductors from the substrate 10 to the power supply connection unit can also be made invisible from the outside.

  FIG. 6 shows that the fastening holes 124a for fastening the base 41 of the power supply connection unit 40 to the radiator 30 are arranged facing the three notches in the radial heat radiating fins. An obstructing portion 124b having a width wider than the notch width of the notched portion is formed on the side surface of the portion 124a facing the notched portion. The shielding portion 124b extends until it is flush with the end face of the radial heat dissipating fin portion, thereby enhancing the heat dissipating effect and making the two conductors connected from the substrate 10 to the power connection unit invisible from the outside. I can do it. The shielding portion 124b or the fastening hole portion 124a is a line (in the drawing) that connects the wall surfaces of the holes (the inner surface of the third cylindrical body 38) through which the two conductive wires pass from the notched width of the radial radiating fin portion. It is desirable that the width is equal to or larger than the width defined by the two-dot chain line.

  Therefore, in the heat radiating body 30 in which the heat radiating fins are formed as described above, as shown in FIG. 5, the heat released from the inner and outer peripheral surfaces of the first cylindrical body 36 is the second cylindrical body 37 and the third The air passes through the air passage secured at the end of the cylindrical body 38, and passes through the air passage between the radial radiating fin modules to be discharged into the atmosphere. Similarly, the heat released from the inner and outer peripheral surfaces of the second cylindrical body 37 passes through the ventilation path secured at the end of the third cylindrical body 38 and the ventilation paths between the radial radiating fin modules. Will be discharged into the atmosphere. And the heat | fever discharged | emitted from the whole surface of the radial radiation fin part is discharged | emitted in air | atmosphere as it is or through the ventilation path between each radial radiation fin module. As a result, the heat of the LED transmitted to the substrate receiving surface through the substrate can be transmitted to each heat radiation fin and dissipated from the surface to the atmosphere.

In the present embodiment, the power connection unit 40 includes a base 41 and a base 42.
The base 41 is formed of an insulative resin material. One end of the base 41 forms a fitting part 41 a that is fitted into the other end of the radiator 30. The other end is screwed into the base 42. This is a base mounting portion 41b for mounting. As shown in FIGS. 1 and 2B, the base washer 41 is fastened to the radiator 30 by screws 131, spring washers, and washers 132. Specifically, a fastening hole (screw hole) portion 124a is formed at the other end portion of the radiator 30, and a screw 131 inserted from the other end portion of the base seat 41 is screwed into the fastening hole portion 124a. Thus, the base 41 is fastened to the radiator 30.

The base 42 is formed of a conductive metal material. The peripheral wall of the base 42 forms a cylindrical screw portion 42a, and the inner peripheral surface thereof is screwed into the base mounting portion 41b of the base seat 41 (see FIG. 2D). In the present embodiment, the base 42 is processed into a shape suitable for a light bulb socket standardized for indoor lighting. As the bulb socket for indoor lighting, for example, E11 standard applied to halogen lamps, E17 standard applied to jujube bulbs, krypton lamps, etc., E26 standard applied to general incandescent bulbs, etc. It is defined in the standard (JIS) and international standard (IEC). The base 42 has a shape suitable for these standardized bulb sockets for indoor lighting, so that it can be mounted on an existing bulb socket and lit by receiving power supply from an indoor AC power source.
The conducting wire 13 extending from the substrate 10 is soldered to the base 42.

  The light diverging member 50 is disposed at a position facing the surface of the substrate 10 as shown in FIGS. The light diffusing member 50 has a main body having a shape in which a cylindrical peripheral wall 52 extends in the axial direction from the periphery of a disk-shaped flat plate portion 51, and a transmission portion 53 is formed on the flat plate portion 51 of the main body. . The transmissive portions 53 are formed at a plurality of locations facing the plurality of LEDs 12 mounted on the surface of the substrate 10, and the transmissive portions 53 have a function of transmitting light emitted from the LEDs 12 while diverging. Further, a lens portion may be provided on the surface of the transmission portion 53 to further diffuse.

Further, a stepped cylindrical portion 54 is formed from the three portions of the flat plate portion 51 toward the back surface side. The stepped cylindrical portion 54 is inserted with the above-described first spring washer-attached screw 111, and a leg portion 63 of a fastening member 61 described later is disposed in the concave portion on the surface side.
The end surfaces of the stepped cylindrical portion 54 and the peripheral wall 52 constitute a contact portion that presses the surface of the substrate 10 with the fastening force of the first spring washer-attached screw 111. The substrate 10 is brought into close contact with the substrate receiving surface 20 by the pressing force received from these contact portions.

As shown in FIG. 1, the fastening member 61 includes a disk-shaped table surface 62, cylindrical leg portions 63 extending from the three positions of the table surface to the back surface side, and a engagement formed on the surface of the table surface 62. The pawl 64 is provided.
The fastening member 61 is disposed near the inner center of the transmission part 53 on the surface side of the flat plate part 51 of the light diffusing member 50. Here, the leg part 63 is arrange | positioned at the recessed part of the surface side formed in the stepped cylindrical part 54 of the light-diffusion member 50 as already stated.

  The screw 111 with the first spring washer is inserted from the table surface 62 of the fastening member 61 into the hollow portion of the leg portion 63, passes through the stepped cylindrical portion 54 of the light diffusing member 50, and the substrate 10, and the tip portion receives the substrate. The fastening member 61, the light diverging member 50, the substrate 10 and the substrate receiving surface 20 are fastened together by screwing into a screw hole provided in the surface 20.

  As shown in FIGS. 1 and 2B, the light diffuser 60 is formed in a conical shape having a hollow inside, and the surface thereof is emitted from the LED 12 and passes through the transmission part 53 of the light diffusing member 50. The surface has fine irregularities so as to diffusely reflect the scattered light. An engaging piece 60 a extends toward the bottom surface (opening) inside the light diffuser 60, and the light diffuser 60 is engaged with the engaging claw 64 of the fastening member 61. Is attached to the surface of the fastening member 61.

  The light diffuser 60 is disposed on the inner side (near the center) of the circumferentially arranged LED 12 and the transmitting portion 53 at the opposite position thereof, and transmits the light of the LED 12 that has been transmitted through the transmitting portion 53 and diverged inward. Diffuse outward. Thus, by providing the light diffuser 60 on the inner side, it is possible to efficiently dissipate light and improve brightness. A lens portion can be provided on the surface of the transmission portion 53.

  The hood 70 is formed of a white translucent resin material in a dome shape, and is attached to the peripheral wall of the substrate receiving surface 20 so as to cover the substrate 10 as shown in FIG.

Next, an assembly procedure of the LED lighting device according to this embodiment will be described with reference mainly to FIGS. 3 and 4.
First, as shown in FIGS. 3 (b1) and (b2), the substrate 10 is arranged on the upper surface of the radiator 30 shown in FIGS. c1) As shown in (c2), the light diverging member 50 is disposed so as to cover the substrate 10. 4 (d1) and (d2), the fastening member 61 is disposed on the flat plate portion 51 of the light diffusing member 50, and the fastening member 61 and the light diffusing member 50 are provided with the first spring washer-attached screw 111. , And the substrate 10 are fastened together with the substrate receiving surface 20. Similarly, as shown in FIGS. 4 (d 1) and (d 2), the base washer 41 is fastened to the other end of the radiator 30 with screws 131, spring washers, and washers 132. As shown in FIG. 2B, the base 40 is screwed into the base 41. At this time, the lead wire 13 is soldered to the base 40. Then, as shown in FIGS. 4 (e 1) and (e 2), the light diffuser 60 is mounted on the surface of the fastening member 61.

Finally, although not shown, the hood 70 is attached to the substrate receiving surface 20 to complete the assembly of the LED lighting device (see FIG. 1). Note that the mounting of the lighting circuit component 11, the LED 12, the conductive wire 13 and the like to the substrate 10 is performed in advance in a process different from the assembly process described above.
[Second Embodiment]

  7 to 8 are views for explaining an LED lighting device according to a second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the part which is the same as that of the LED lighting apparatus which concerns on 2nd Embodiment shown previously, or an equivalent part, and the detailed description of the part is abbreviate | omitted.

  The LED lighting device of this embodiment has a configuration suitable for use as a downlight. That is, as shown in FIGS. 7 and 8, the aluminum die-casting radiator 300 has a peripheral wall 201 whose substrate receiving surface 200 extends long in the axial direction. The inner peripheral surface of the peripheral wall is finished to a mirror surface that reflects light. Furthermore, a large number of protrusions 202 that enhance the heat dissipation effect are formed on the outer peripheral surface of the peripheral wall 201, and holding pieces 210 having spring properties are fastened at three locations on the outer peripheral surface. The LED lighting device is installed in a mounting hole formed in the ceiling of the house with the spring force of the holding piece 210. Since the facility structure is the same as a well-known downlight, detailed description is omitted.

  A hood 220 is attached to the opening surface of the substrate receiving surface 200. The periphery of the hood 220 is held by a frame body 221. The frame body 221 is fastened to the peripheral wall 201 on the substrate receiving surface 200 of the heat radiating body by screws 222.

In the LED lighting device of the present embodiment, the power connection unit is composed of a terminal block 230 containing a terminal (not shown), and is fastened to the radiator 300 with a mounting frame 241, a fixing plate 242, and screws 243. ing. That is, the fixing plate 242 is fixed to the other end portion of the heat radiating body 300 by a screw 121, a nut 122, and a spring washer and washer 123 constituting the second fastening member, and attached to the fixing plate 242 with the screw 243. A frame 241 is attached. The terminal block 230 is caulked and fixed to the mounting frame 241.
The conducting wire 13 is soldered to a terminal (not shown) built in the terminal block 230.

Next, the assembly procedure of the LED lighting device according to this embodiment will be described.
First, in a state where the fixing plate 242 is disposed on the other end surface of the substrate receiving surface 200 existing on one end surface of the radiator 300, the fixing plate 242 is attached to the radiator 30 with screws 121, nuts 122, spring washers, and washers 123. Conclude.

Next, the substrate 10 is disposed on the surface (upper surface) of the substrate receiving surface 200 of the heat radiating body 300, the light diffusing member 50 is disposed so as to cover the substrate 10, and the fastening member 61 is attached to the flat plate portion 51 of the light diffusing member 50. The fastening member 61, the light diffusing member 50, and the substrate 10 are integrally fastened to the substrate receiving surface 200 with the first spring washer screw 111 and the first nut 112.
Further, the light diffuser 60 is mounted on the surface of the fastening member 61, and the hood 220 is mounted on the opening surface of the substrate receiving surface 200.

  In addition, an attachment frame 241 is attached with a screw 243 to a fixing plate 242 fixed to the other end of the radiator 300, and the terminal block 230 is caulked and fixed to the attachment frame 241. The LED lighting device is assembled by such a procedure.

  In addition, this invention is not limited to embodiment mentioned above, Of course, a various change can be added in the range which does not deviate from the summary of this invention.

10: Board, 11: Lighting circuit component, 12: LED, 13: Conductor,
20: substrate receiving surface,
30: radiator
40: power connection unit, 41: base, 41a: fitting part, 41b: base mounting part, 42: base,
50: light diffusing member, 51: flat plate part, 52: peripheral wall, 53: transmission part, 54: cylindrical part with step,
60: Light diffuser, 60a: Engagement piece, 61: Fastening member, 62: Table surface, 63: Leg part, 64: Locking claw,
70: Food,
111: Screw with first spring washer,
200: substrate receiving surface, 201: peripheral wall, 202: protrusion, 210: holding piece, 220: hood, 221: frame,
230: terminal block, 241: mounting frame, 242: fixing plate,

Claims (12)

An LED lighting device comprising at least a substrate on which an LED is mounted on the surface, and a heat radiator having a surface with which the back surface of the substrate contacts,
The radiator is
A radial radiating fin portion comprising a number of radiating fins extending radially from the back surface of the surface in contact with the substrate; and
Similarly, it comprises a cylindrical radiating fin portion made of at least one cylindrical body concentrically arranged with the radial radiating fin portion inside the radial radiating fin portion, extending from the back surface of the surface in contact with the substrate. ,
Furthermore, all the cylindrical bodies constituting the cylindrical radiating fin portion are formed such that the axial center length is shorter than the length of the radial radiating fin portion extending from the back surface of the surface in contact with the substrate. Forming an air passage that allows gas flow inside and outside each cylindrical body ,
The radial heat radiating fin unit, LED lighting device according to claim Rukoto comprises a ventilation path for discharging the heat through the vent passage to allow gas flow in and out of the tubular body into the air.
The radial radiating fin portion is an arc-shaped portion in which a radiating fin extending from the back surface of the surface in contact with the substrate is formed by cutting out a part of a peripheral surface of a cylindrical body concentric with the cylindrical radiating fin portion. It extends radially from the outer surface ,
Radiating fins extending from one arc-shaped portion constitutes a radial radiating fin module, LED lighting device according to claim 1 between the adjacent said radial heat radiation fins module characterized that you function as air passage.
All the cylindrical bodies constituting the cylindrical radiating fin portion are formed such that the outermost cylindrical body is the same as or longer than the cylindrical body existing on the inner side. The LED lighting device according to claim 1 or 2, wherein
The radiator includes a substrate receiving surface that accommodates the substrate and is in surface contact with the back surface of the substrate.
A plurality of LEDs are annularly arranged on the surface of the substrate,
4. The LED illumination device according to claim 1, wherein the radial heat dissipating fin portion extends from a back surface of a surface of the substrate receiving surface that is in contact with a region where the LED is arranged on the substrate. .
Furthermore, an insulating fastening member is provided that presses the substrate in a direction in close contact with the radiator,
A fastening hole for fastening the base of the power connection unit is provided.
The radial radiating fin portion has an arc shape in which a radiating fin extending from the back surface of the surface in contact with the substrate is formed by cutting out a part of a circumferential surface of a cylindrical body concentric with the cylindrical radiating fin portion in the axial direction. Extending radially from the outer peripheral surface of the part,
5. The shielding portion for making the conductive wire connected to the power supply unit invisible from the outside is formed on a side surface facing the gap between the arc-shaped portions in the fastening hole portion. LED lighting apparatus as described in any one.
A light divergence member disposed at a position facing the surface of the substrate, and a fastening member that presses the substrate in a direction in close contact with the radiator ,
The light diffusing member includes a transmission part for diffusing the light emitted by the LED facing the LED mounted on the surface of the substrate, and a contact part for pressing the surface of the substrate,
The light diffusing member is fastened by the fastening member that passes through the substrate and is fastened to a heat radiator, and the contact portion presses the surface of the substrate with the fastening force. The LED illumination device according to any one of claims 1 to 5.
The LED illumination device according to claim 6, wherein a lens is formed in the transmission portion, and the lens is provided to face an LED mounted on the surface of the substrate.
Furthermore, it comprises a fastening member that presses the substrate in the direction of tightly contacting the radiator,
The substrate Yes formed in a disc shape, the surface central part, together with the lighting circuit components for lighting the LED is mounted, the LED are arranged radially around,
The fastening member includes a fastening seat disposed on the front surface side of the substrate, and a leg portion extending from the back surface of the fastening seat,
The said fastening seat is provided in the position which opposes the said lighting circuit component inside the arrangement | sequence of said LED, and the light diffusing body was integrated in the surface of the said fastening seat, The one of Claim 1 thru | or 7 characterized by the above-mentioned. The LED lighting device according to one item.
The fastening seat of the fastening member is provided with a locking claw protruding from the surface,
The LED lighting device according to claim 8, wherein the light diffuser is configured to be mounted on a surface side of the fastening seat via the locking claw.
A hood fitting portion extending in the axial direction is formed on a peripheral edge of the surface that contacts the back surface of the substrate, and a hood periphery that covers the front side of the substrate is fitted into the hood fitting portion. The LED illumination device according to any one of claims 1 to 9.
A lighting circuit component for lighting the LED is mounted on the substrate,
A power connection unit that supplies power to the lighting circuit is provided on the end side of the cylindrical body that extends from the back surface of the surface of the radiator that contacts the substrate,
The power supply connection unit includes an insulating base connected to the radiator and a base made of a conductive metal screwed to the base.
The said base is formed in the shape and dimension suitable for the bulb socket standardized for indoor lighting, and is electrically connected with the said lighting circuit component via a conductor. The LED lighting device according to any one of 10.
A lighting circuit component for lighting the LED is mounted on the substrate,
A power connection unit that supplies power to the lighting circuit is provided on the end side of the cylindrical body that extends from the back surface of the surface of the radiator that contacts the substrate,
The power supply connection unit includes an insulating terminal block coupled to the radiator and a terminal provided on the terminal block.
The LED lighting device according to claim 1, wherein the terminal is electrically connected to the lighting circuit component through a conductor.