JP6861783B2 - Heat dissipation fins, heat sinks and lighting fixtures - Google Patents

Description

The present invention relates to a luminaire provided with radiating fins and a heat sink having radiating fins. In particular, it relates to lighting fixtures that are hung from the ceiling.

There is a lighting fixture in which a plurality of triangular LED substrates are arranged in the circumferential direction to form a circular shape, and each LED substrate is fixed to a heat sink with a reflector (for example, Patent Document 1).

Further, there is a heat sink in which a plurality of heat radiating fins formed by bending in a U shape are provided to form a heat radiating unit (for example, Patent Document 2). According to this heat sink, air flows in from the outer peripheral side and the lower end side of the heat sink arranged in a circumferential shape and is convected upward as it is, so that the heat of the LED can be efficiently dissipated by the heat sink.

Further, there is a heat sink in which heat-dissipating fins are attached to a support substrate by a heat conductive member (for example, Patent Document 3).

Further, when an LED lighting fixture is attached to the ceiling of a gymnasium, for example, there is a lighting fixture in which a guard is attached to the light source side of the main body in order to prevent the light source from colliding with a ball (for example, Patent Document 4).

Further, there are lighting fixtures in which a wire is used to prevent the reflector from falling, or a connector is provided in the fixture to prevent the reflector from falling (for example, Patent Document 5).

In addition, there are lighting fixtures in which the fixture body is fixed to a mounted portion such as a ceiling by a hanging pipe or the like (for example, Patent Documents 6 to 8).
In addition, there are lighting fixtures in which the fixture body is hung from a mounting portion such as a ceiling by a hanging tool such as a chain (for example, Patent Documents 9 to 11).

Japanese Unexamined Patent Publication No. 2013-65410 Japanese Patent No. 5284522 Utility Model Registration No. 3130026 Japanese Unexamined Patent Publication No. 2013-65411 Japanese Unexamined Patent Publication No. 2012-33331 JP-A-2007-242409 Japanese Unexamined Patent Publication No. 2013-77470 Japanese Patent No. 5351817 Japanese Unexamined Patent Publication No. 2001-184930 Japanese Unexamined Patent Publication No. 2010-92611 Japanese Patent No. 5369208 Japanese Unexamined Patent Publication No. 2010-87016 Japanese Unexamined Patent Publication No. 5-301516

In the conventional lighting equipment, since a plurality of LED substrates are arranged in the circumferential direction and each LED substrate is fixed by a reflector, the workability of attaching the reflector is inferior. Further, since a plurality of reflectors are attached to the heat sink, a gap is formed between the reflectors and the adjacent reflectors, which is inferior in design.

Further, if the air intake port is provided so that air flows in from the outer peripheral side and the lower end side of the heat sink arranged in a circumferential shape, there is a problem that the outer shell (circular shape of the light emitting portion) of the luminaire becomes large.

In addition, when the heat sink is made of sheet metal, the mechanical connection between the base plate and the heat dissipation fins is weak, and when the heat is transferred between the base plate and the heat dissipation fins due to the weak mechanical bonding force, There was a problem that the thermal resistance became large.

In addition, when attaching a guard for protection, it is necessary to provide a guard attachment part on the main body, and when the guard is not attached to the lighting equipment (main body), the guard attachment part is an unnecessary part, and the guard attachment part Was inferior in design because it protruded into the outer shell of the main body.

Further, when the fall prevention wire is attached to the outside of the reflector, there is a problem that the design is inferior, and when the connector is provided inside the fixture, the process of assembling the reflector, the main body and the connector becomes complicated. There was a problem.

In addition, since the method of mounting the conventional hanging lighting fixtures on the ceiling is fixed, it is necessary to prepare a plurality of models of the lighting fixtures according to the mounting method on the ceiling.

An object of the present invention is to provide a heat radiating fin that improves the function of a heat sink.

The heat radiation fin according to the present invention is
It has a mounting part that is fixed to the base plate and a heat sink that is continuous with the mounting part.
The mounting portion is in close contact with the base plate in a state of surface contact throughout.
The heat radiating plate has a cut portion that forms a space between the heat radiating plate and the base plate.

According to the present invention, since the heat radiating fin has a cut portion, an end space can be formed and air can be easily convected.

It is a perspective view (perspective view from four directions) which shows the lighting fixture of Embodiment 1. FIG. It is a three-view view of a lighting fixture. It is a left side fracture side view and the central part omitted bottom view of the luminaire. It is an exploded perspective view of a lighting fixture. It is a light source module 14 and its connection diagram. It is a figure of the intake cover part 17. It is a figure of the light transmission cover part 19. It is a figure of packing 18. It is a figure of a reflector 15. It is a perspective view which attached 5 light source modules 14 to the reflector 15. It is a back view which attached four light source modules 14 to a reflector 15. It is the figure which attached the reflector 15 to the heat sink 12. It is a positional relationship diagram of a light source module 14 and a heat sink 12. It is a figure of the heat dissipation insulation sheet 13. It is a figure of a heat sink 12. It is a figure of the base plate 121 of a heat sink 12. It is a figure of the heat radiation fin 122 of a heat sink 12. It is a figure of the main body cover part 16. It is a figure of the exhaust cover part 20. It is a figure of the dust avoidance cover part 21. It is a perspective view of the suspension body 60. It is a three-view view of the suspension body 60. It is a figure of the ceiling fixture 61. It is a figure of the connection part 62. It is a figure of the housing attachment 63. It is a figure which shows another example of the exhaust port 204. It is a figure which shows another example of an intake port 171. It is a figure which shows the other arrangement example of the heat radiation fin 122. It is a figure of the additional component 22 of the second embodiment. It is a right side fracture side view of the luminaire 100 of Embodiment 2. FIG. FIG. 30 is a partially enlarged view of FIG. 30 of the second embodiment. It is a figure which shows another example of the additional part 22 of Embodiment 2. It is a figure which shows the luminaire 100 of Embodiment 3. It is a figure which shows the luminaire 100 of Embodiment 4. It is a figure of the fall prevention wire of Embodiment 4. It is a relationship diagram between the fin angle of the heat radiation fin 122 of FIG. 28 and the temperature of LED 142.

Embodiment 1.
FIG. 1 is a perspective view (perspective view from four directions) showing the lighting equipment of the first embodiment.
FIG. 2 is a three-view view of the luminaire.
FIG. 3 is a left side fracture side view and a central portion omitted bottom view of the luminaire.
FIG. 4 is an exploded perspective view of the luminaire.

The lighting fixture 100 has a housing body 50 and a hanging body 60.
The height H of the housing 50 is larger than the maximum diameter D of the housing.
The housing 50 includes a main body cover portion 16, an intake cover portion 17, a light transmitting cover portion 19, an exhaust cover portion 20, and a dust avoiding cover portion 21.

The relationship and function of each cover portion of the lighting fixture 100 are as follows.
(1) Main body cover portion 16 covering the heat sink 12,
(2) The intake cover portion 17, which is attached to the main body cover portion 16 and has an intake port 171 for sucking air into the main body cover portion 16.
(3) The light transmissive cover portion 19, which is attached to the inside of the intake cover portion 17 via the packing 18,
(4) The exhaust cover portion 20, which is attached to the main body cover portion 16 and has an exhaust port 204 for exhausting the air inside the main body cover portion 16.
(5) A dust avoiding cover portion 21 that is attached to the exhaust cover portion 20 and prevents dust from entering through the exhaust port 204.

The housing 50 has the following built-in components.
(1) Heat sink 12,
(2) Heat dissipation insulation sheet 13,
(3) Five light source modules 14 attached to the heat sink 12 via the heat radiating insulation sheet 13.
(4) One reflector 15 for fixing the light source module 14 to the heat sink 12.

The suspension body 60 is a support column portion that is attached to the exhaust cover portion 20 so as to sandwich the dust avoidance cover portion 21 and is fixed to the ceiling.
The suspension body 60 has a ceiling mounting tool 61, a connecting portion 62, and a housing mounting tool 63.

FIG. 5 is a wiring connection diagram of the light source module 14 and its wiring.
The light source module 14 includes a substrate 141, a plurality of LEDs 142 serving as a light source, and two connectors 144.

The substrate 141 is formed by forming an insulating layer and a conductive layer on an aluminum plate and forming circuit wiring by etching. The plurality of LEDs 142 and the two connectors 144 are soldered to the surface of the substrate 141.

The substrate 141 has three screw avoidance cut portions 147. The two screw avoidance cut portions 147 are formed by cutting out adjacent corners of the substrate 141 in a fan shape (a quarter circle shape). The screw avoidance cut portion 147 at one location is obtained by cutting the substrate 141 between the connectors 144 into a substantially semicircular shape.
The substrate 141 has two diagonally cut portions 148. The diagonally cut portion 148 is a portion of the substrate 141 on both sides of the connector 144 that is cut diagonally.
At the center of both sides of the substrate 141, there is a positioning notch 149 for positioning the light source module 14.

The LED 142 is a light emitting diode element soldered to the surface of the substrate 141. The plurality of LEDs 142 are arranged in the vertical and horizontal directions, and are arranged in an octagonal or circular shape as a whole.
A substrate edge portion 143 exists around the plurality of LEDs 142, and no element or wiring is present on the substrate edge portion 143.
The connector 144 is a terminal to which power is supplied from the electric wire 146. After being connected to the connector 144, the electric wire 146 is fixed to the housing 50 with a tension stopper 99 in order to prevent tension from being applied. The wiring 145 is a circuit pattern or an electrode pad formed on the substrate 141.
The back surface of the light source module 14 is flat in order to maximize the heat dissipation area, and no element is mounted on the back surface.

FIG. 6 is a view of the intake cover portion 17.
The intake cover portion 17 has an annular band shape as a whole.
The intake cover portion 17 has an inner cylinder portion 173 having a small diameter height H1 and an outer cylinder portion 175 having a large diameter height H2. Both the inner cylinder portion 173 and the outer cylinder portion 175 have an annular band shape.

An inner flange portion 172 is formed from the upper end portion of the inner cylinder portion 173 toward the center. The opening shape of the inner collar portion 172 exhibits the outer shape of a flower having five petals.
The inner cylinder portion 173 and the outer cylinder portion 175 are continuous with each other by a horizontal ring-shaped middle ring portion 174. The middle ring portion 174 has eight screw holes 45, and the heat sink 12 is fixed by the screws 35.
The base plate 121 of the heat sink 12 is thermally connected by coming into contact with the middle ring portion 174 in a surface manner to improve the heat dissipation effect.
A plurality of intake ports 171 are formed in the outer cylinder portion 175 by a plurality of opening forming portions 177. As described above, the housing 50 has a plurality of intake ports 171 in the lower 360-degree direction.

A plurality of intake ports 171 are formed on the side surfaces of the housing 50 that surrounds the heat sink 12.
The intake port 171 is formed in the direction perpendicular to the lower side surface of the housing 50, and the shape of the intake port 171 is rectangular.

An outer flange portion 176 is formed horizontally from the end of the outer cylinder portion 175 toward the outside. The shape of the outer collar portion 176 is a ring shape. The outer collar portion 176 has four screw holes 43, and the main body cover portion 16 is fixed to the outer collar portion 176 by screws 33 or rivets.
Further, the outer collar portion 176 has four notches 178 for hooking on the main body cover portion 16. The notch 178 has a U-shaped notch from the outside of the outer flange portion 176.

As described above, the intake cover portion 17 is formed in a ring shape and has a band-shaped side surface, and a plurality of openings serving as an intake port 171 are formed on the band-shaped side surface.
The intake cover portion 17 is open in a circular shape in the vertical direction.
An upward opening formed by the outer cylinder portion 175 and the outer flange portion 176 is attached to the opening portion on the lower end side of the main body cover portion 16.
A light transmissive cover portion 19 is attached to the inside of the inner flange portion 172 to close the lower opening formed by the inner cylinder portion 173 and the inner flange portion 172.

When air flows in from the intake port 171 of the intake cover portion 17, air flows in between the heat radiation fins 122 arranged inside the main body cover portion 16. The air taken in from the intake port 171 on the side surface of the intake cover portion 17 is blown downward and laterally (obliquely upward) of the heat sink 12 (radiating fin 122) and heated by the heat of the heat sink 12 (radiating fin 122). While rising.
It is preferable that the intake port 171 is arranged so that the intake port 171 faces the heat radiating fins 122 in accordance with the arrangement of the heat radiating fins 122 of the heat sink 12.

FIG. 7 is a view of the light transmissive cover portion 19.
The light-transmitting cover portion 19 is made of a resin or glass having a light-transmitting property of 85% or more. The shape of the light transmissive cover portion 19 is a disk.
In addition, antistatic treatment and anti-scattering treatment are applied according to the usage environment.

FIG. 8 is a diagram of packing 18.
The packing 18 is made of an annular elastic rubber. As the elastic rubber, for example, silicon rubber is used. The radial cross section of the packing 18 is U-shaped, and the outer peripheral edge of the light transmissive cover portion 19 is inserted inside. The outer diameter of the packing 18 to which the light transmissive cover portion 19 is attached is equal to or less than the inner diameter of the inner cylinder portion 173, and it is desirable that the diameter is substantially the same.

When the heat sink 12 is fixed to the middle ring portion 174 of the intake cover portion 17, the packing 18 is sandwiched between the inner flange portion 172 and the light transmissive cover portion 19 and elastically deformed, and the reflector 15 and the light transmissive It is sandwiched between the cover portion 19 and the light transmissive cover portion 19 is fixed between the inner flange portion 172 and the reflector 15. Since the packing 18 is elastically deformed and fixed, it is possible to prevent the ingress of dust.

FIG. 9 is a diagram of the reflector 15.
FIG. 10A is a perspective view in which five light source modules 14 are attached to the reflector 15.
FIG. 10B is a positional relationship diagram between the opening 152 and the LED 142 with the substrate 141 removed.
FIG. 11 is a back view of the reflector 15 with four light source modules 14 attached.
FIG. 12 is a view in which the reflector 15 is attached to the heat sink 12.
FIG. 13 is a positional relationship diagram of the light source module 14, the heat sink 12, and the heat radiating insulation sheet 13.

A light transmissive cover portion 19 is arranged on the side of the surface 156 of the reflector 15.
A light source module 14, a heat radiating insulation sheet 13, and a heat sink 12 are arranged on the back surface 157 side of the reflector 15.
The surface 156 of the reflector 15 is finished flat and reflects 90% or more of light with a white or silver (mirror surface) finish.
The shape of the reflector 15 is a disk shape with five openings. The reflector 15 is made of resin. The LED 142 is exposed through the opening 152 of the reflector 15.

Since the reflector 15 is fixed to the heat sink 12 and the heat sink 12 is fixed to the middle ring portion 174 of the intake cover portion 17, the reflector 15 is arranged inside the inner cylinder portion 173. These dimensional relationships are as follows.
Thickness of reflector 15 + Thickness of light-transmitting cover 19 + Thickness of packing 18> Height of inner cylinder 173 H1
That is, by reducing the thickness of the packing 18 by screwing,
Thickness of reflector 15 + Thickness of light-transmitting cover 19 + Thickness of packing 18 = Height of inner cylinder 173 H1
Will be. Therefore, the light transmissive cover portion 19 is securely fixed inside the inner cylinder portion 173.

The reflector 15 is formed with five openings 152. The five openings 152 are arranged in a ring shape on the reflector 15 so that the reflecting portions 154 of the adjacent openings 152 are in contact with each other. Since the five openings 152 are evenly arranged in an annular shape about the center C of the reflector 15, the five openings 152 are arranged at intervals of 72 degrees.

The opening shape of the opening 152 is preferably circular, but is octagonal or hexagonal for the efficient placement of the opening 152 in the reflector 15 or for the efficient placement of the plurality of LEDs 142 in the opening 152. , Trapezoid, or triangle.
The opening 152 has a reflecting portion 154 inclined from the front surface 156 of the reflector 15 toward the back surface 157, and a substrate pressing portion 153 standing upright from the reflecting portion 154 toward the back surface 157.

The inclination angle of the reflecting portion 154 is, for example, 45 degrees with respect to the surface.
The substrate pressing portion 153 is for pressing the substrate edge portion 143 against the heat sink 12. The substrate pressing portion 153 is further bent 45 degrees toward the back surface side from the reflecting portion 154, and is formed in a direction perpendicular to the back surface.

The end surface of the substrate pressing portion 153 is parallel to the back surface, and the entire end surface of the substrate pressing portion 153 comes into contact with the front surface of the substrate 141.
It is desirable that the reflecting portion 154 and the substrate pressing portion 153 are formed all around the opening 152 (360 degrees).

As described above, the reflector 15 has a substrate pressing portion 153 for arranging the substrate 141 on the back surface 157. The substrate pressing portion 153 is a region in which the substrate 141 is arranged, and is a recessed region recessed from the back surface 157 of the reflector 15. The substrate pressing portion 153 is recessed in the thickness direction from the back surface 157 of the reflector 15 by approximately the thickness of the substrate 141.

For example, these dimensional relationships are as follows.
Thickness of reflector 15 RW <Thickness from surface 156 to substrate pressing portion 153 AW + Thickness of substrate 141 BW
Or
Depth of recess from back surface 157 to substrate pressing portion 153 F <thickness BW of substrate 141
That is, the substrate pressing portion 153 is recessed from the back surface 157 by a depth F less than the thickness BW of the substrate 141. By making the amount of the recess of the substrate pressing portion 153 less than the thickness of the substrate 141, when the substrate 141 is arranged in the substrate pressing portion 153 and the reflector 15 is fixed to the heat sink 12, the substrate 141 is surely crimped to the heat sink 12. It is fixed.

The reflector 15 has three mounting portions 151 fixed to the heat sink 12 around the opening 152. The three mounting portions 151 are outside the substrate pressing portion 153 and outside the screw avoidance cut portion 147 of the substrate 141. The thickness of the mounting portion 151 is the same as the thickness RW of the reflector 15. The mounting portion 151 is formed in a cylindrical boss shape toward the back surface 157, has a screw mounting hole in the center, and is fixed to the heat sink 12 using screws 34.

Two positioning pins 159 for positioning the light source module 14 are formed on both sides of the opening 152 at positions corresponding to the positioning notches 149 of the substrate 141. The height of the positioning pin 159 is the same as the height of the mounting portion 151.
The substrate 141 is arranged on the substrate pressing portion 153 inside the three mounting portions 151 by fitting the positioning pin 159 and the positioning notch 149. That is, the screw avoidance cut portion 147 of the light source module 14 is formed at a position corresponding to the position of the mounting portion 151, and the shape of the screw avoidance cut portion 147 is substantially a semicircle corresponding to the cylindrical boss outer shape of the mounting portion 151. It has a shape cut into a shape. Further, since the position and shape of the screw avoidance cut portion 147 correspond to the mounting portion 151, the crimping force between the reflector 15 and the heat sink 12 by the mounting portion 151 can be efficiently transmitted to the substrate 141. In order to improve the transmission of the crimping force, it is desirable that four or more mounting portions 151 are present at the corners of the substrate 141 or the like.

In this way, the substrate 141 is crimp-fixed between the reflector 15 and the heat sink 12 via the heat-dissipating insulating sheet 13 by screw-fixing the mounting portion 151 to the heat sink 12.
Then, the substrate edge portion 143 of the substrate 141 is sandwiched between the substrate pressing portion 153 of the reflector 15 and the heat sink 12, and is securely fixed to the heat sink 12.

The substrate pressing portion 153 has two power feeding tunnels 155 through which two wirings 145 (electric wires 146) are passed. The power supply tunnel 155 is a portion (a portion that does not contact the substrate 141) that is further recessed than the substrate pressing portion 153 for passing the wiring 145 (or the electric wire 146). Further, in the power feeding tunnel 155, a bulge that covers the connector 144 and the element may be formed over the reflecting portion 154. The power supply tunnel 155 can protect the power supply circuit of the light source module 14 without the wiring 145 or the electric wire 146 or the connector 144 or the element being pressed by the substrate pressing portion 153.

Hereinafter, a method for manufacturing and assembling the heat sink 12 and the reflector 15 will be described.
In the reflector 15, a plurality of openings 152 are formed so that the opening edge portion (board pressing portion 153) comes into contact with the substrate edge portion 143 of the substrate 141 of the light source module 14, so as to surround one opening 152. It is molded so that at least three mounting portions 151 (screw mounting holes) are formed.

For the five light source modules 14, the electric wires 146 are connected to the two connectors 144 so as to have the wiring shown in FIG.
The light source module 14 is attached to the substrate pressing portion 153 so that the substrate edge portion 143 of the substrate 141 comes into contact with the substrate pressing portion 153. At that time, the positioning notch 149 and the positioning pin 159 are aligned with each other so that the connector 144 of the light source module 14 is on the center side of the reflector 15. In this way, the light source module 14 is accurately positioned on the substrate pressing portion 153. An adhesive or double-sided tape may be placed on the substrate pressing portion 153, and the light source module 14 may be temporarily fastened to the substrate pressing portion 153.
Further, the reflector 15 may have a claw shape to fix the light source module 14. In that case, the heat sink 12 and the heat radiating insulation sheet 13 are provided with claw-shaped relief portions.

As shown in FIG. 11, the light source module 14 is arranged so that the oblique cut portions 148 are adjacent to each other. Compared with the case where the diagonal cut portion 148 is not formed, the light source module 14 can be arranged closer if the diagonal cut portion 148 is provided.
Next, the reflector 15 is attached to the base plate 121 with the heat radiating insulation sheet 13 interposed therebetween. Next, by screwing the screw 34 into the screw mounting hole of the mounting portion 151, the reflector 15 is fastened to the heat sink 12 (base plate 121), and the substrate pressing portion 153 which is the opening edge of the opening 152 is the substrate 141. Since the substrate edge portion 143 of the above is pressed against the heat radiating insulation sheet 13, the substrate 141 is fixed so as to be in close contact with the base plate 121 with the heat radiating insulation sheet 13 interposed therebetween.

As described above, the plurality of boards 141 are fixed by attaching the reflector 15 to the heat sink 12, and the screw holes 44 (fixing portion) of the heat sink 12 and the reflector mounting portion 151 (mounting portion) are attached to the respective boards. Three or more substrates are arranged, and the five substrates are arranged so as to be rotationally symmetric from the center of the heat sink 12.

The functions and effects of the reflector 15 will be described.
Since the plurality of light source modules 14 are fixed to the base plate 121 by one reflector 15, the plurality of light source modules 14 can be arranged close to each other. That is, when each light source module is fixed with a reflector, it is difficult to arrange the light source modules close to each other because it is necessary to provide a space so that the respective reflectors do not come into contact with each other. However, by using one reflector, it is not necessary to consider that the reflectors come into contact with each other, so that the light source modules can be arranged close to each other.
Further, in the case of a plurality of reflectors, the design was inferior because there was a gap between the reflectors adjacent to each other. Is improved.

Further, by using one reflector 15, a plurality of light source modules 14 can be fixed at once, and the workability of fixing the light source module 14 and the reflector 15 is improved.

Further, since the periphery of the light source module 14 is fixed at at least three points, the light source module 14 can be pressed against the heat sink 12 (base plate 121) with a uniform force so that the substrate 141 and the base plate 121 are in uniform surface contact. it can. Therefore, the heat conduction from the substrate 141 to the base plate 121 is improved.

Further, by using the reflector 15 as one member, the molding process is facilitated, the processing cost is reduced, and the amount of the resin member used is also reduced, so that the cost of the resin member is also reduced.

Further, since the circular substrate 141 can be used for the light source module 14, for example, an existing light source module used for a downlight or the like can be diverted.

Further, since a plurality of openings 152 are formed in the reflector 15, the diffusion cover can be attached to the opening 152 or the light collecting cover can be attached to the opening 152 according to the desired light distribution characteristics. Further, the type of the cover attached to each opening 152 may be changed.

FIG. 14 is a diagram of the heat radiating insulation sheet 13.
The heat radiating insulation sheet 13 is not an indispensable component, but is intended to improve heat dissipation and improve insulation. The shape of the heat radiating insulation sheet 13 is a circle having substantially the same diameter as the reflector 15, and the heat radiating insulation sheet 13 is provided between the reflector 15 and the heat sink 12.
The heat radiating insulation sheet 13 may be provided only between the substrate 141 and the heat sink 12. When the reflector 15 and the substrate 141 are made of an insulating material, it does not have to be a heat radiating insulation sheet, but may be a heat radiating sheet.

FIG. 15 is a diagram of the heat sink 12.
FIG. 16 is a diagram of the base plate 121 of the heat sink 12.
FIG. 17 is a diagram of heat dissipation fins 122 of the heat sink 12.

The heat sink 12 includes a base plate 121 made of sheet metal and heat radiation fins 122 made of sheet metal.
The heat sink 12 has a screw hole 44, and the reflector 15 is fixed by the screw 34. Three screw holes 44 are provided for each opening 152 of the reflector 15. The position of the screw hole 44 corresponds to the mounting portion 151.
The heat sink 12 has a screw hole 45, and the intake cover portion 17 is fixed by the screw 35.
The heat sink 12 has a fall prevention insertion hole 236 through which the fall prevention wire is passed. The fall prevention wire will be described in the fourth embodiment.

The heat sink 12 has a plurality of heat radiation fins 122.
FIG. 17 shows a case where one heat radiating fin 122 has two heat radiating plates 125 formed by bending one sheet metal.
The heat radiating plate 125 has a long side 81 parallel to the base plate 121, a short side 82 orthogonal to the base plate 121, and an inclined hypotenuse 83.
The long sides 81 of the heat radiating plate 125 are arranged radially from the center C (central portion) of the heat sink 12.
At both ends of the lower part of the heat radiating plate 125, there are an inner cut portion 84 and an outer cut portion 85 cut in an L shape in order to avoid screws and screw holes.
The length of the long side 81 of the heat radiating plate 125 is the same as the length in the radial direction excluding the opening of the base plate 121 and the outer peripheral edge.
The position of the upper tip of the short side 82 of the heat radiating plate 125 is the same as the position of the outer flange portion 176.
The inclination angle of the hypotenuse 83 of the heat radiating plate 125 is the same as the inclination angle of the main body cover portion 16.

In FIG. 15, the central angle θ1 of the two heat radiating plates 125 and the central angle θ2 of the heat radiating plates 125 of the radiating fins 122 adjacent to each other are the same (θ1 = θ2) or substantially the same angle. Therefore, the end space 714 of the adjacent heat radiating plates 125 has the same (almost the same) size. The end space 714 is a space between the short side 82 of the heat radiating plate 125 and the outer cut portion 85. The intake port 171 described above is formed at a position corresponding to the end space 714 of the heat radiating plate 125 (the short side 82 of the heat radiating plate 125 and the outer cut portion 85).

The heat sink 12 has a fin fixing portion 129 in which the heat radiating fin 122 is fixed to the base plate 121.
The fin fixing portion 129 is formed by deforming a part of the sheet metal of the base plate 121. The fin fixing portion 129 is formed by deforming the protrusion 123 formed on the base plate 121.

As shown in FIG. 17, the heat radiation fin 122 has a mounting portion 126 that is in close contact with the base plate 121. The mounting portion 126 has a trapezoidal shape, and has three mounting holes 127 in the linear direction in the center of the trapezoidal shape.
The protrusion 123 has an annular convex shape having a hole 124 in the center.
The fin fixing portion 129 sandwiches the back surface 712 and the front surface 711 of the hole edge portion 713 of the mounting hole 127 by inserting the protrusion 123 into the mounting hole 127 and bending the tip of the protrusion 123 outward.
That is, the fin fixing portion 129 sandwiches the back surface 712 and the front surface 711 of the mounting hole 127 of the mounting portion 126, and fixes the heat radiation fin 122 to the base plate 121.

Hereinafter, a method for manufacturing the heat sink 12 will be described.
A screw hole 44 and a screw hole 45 are formed in the base plate 121.
A small diameter hole having a diameter smaller than the diameter of the mounting hole 127 is punched at a position corresponding to the mounting hole 127 of the base plate 121. A tool (punch) having a diameter larger than the diameter of the small diameter hole and smaller than the diameter of the mounting hole 127 is driven into the small diameter hole to form a convex portion having an outer diameter equal to or slightly smaller than the diameter of the mounting hole 127. This convex portion becomes a protrusion 123 having a hole 124 in the center.

Three mounting holes 127 are formed in one sheet metal and bent in a U shape to form heat radiation fins 122. Both sides of the bend become heat radiating plates 125, and the portion connecting the heat radiating plates 125 becomes a mounting portion 126.
The mounting portion 126 has a mounting hole 127 into which the convex portion of the protrusion 123 of the base plate 121 is fitted. By fitting the mounting hole 127 into the convex portion of the protrusion 123 of the base plate 121, the mounting portion 126 is positioned on the base plate 121.

Next, by crushing the tip of the convex portion of the protrusion 123 with a tool (punch) having a diameter larger than the diameter of the mounting hole 127, the tip of the protrusion 123 is deformed outward, and the mounting hole 127 and the protrusion 123 are 360 degrees. It is fastened evenly in the direction and the mounting portion 126 is sandwiched.
The base plate 121 and the mounting portion 126 are in close contact with each other without using solder or an adhesive for manufacturing the heat sink 12.

As described above, by enlarging the small diameter hole to form the hole 124 in the protrusion 123, when the tool (punch) is pushed into the protrusion 123, the tip of the protrusion 123 is likely to be deformed evenly in the 360-degree direction. , The protrusion 123 and the mounting hole 127 can be easily fastened.

Further, by bending the tip portion of the protrusion 123 outward (opposite to the center direction of the hole 124) while the mounting hole 127 is pushed into the protrusion 123, the fixing force for fixing the heat radiation fin 122 to the base plate 121 is increased. ..
Even if the amount of deformation of the protrusion 123 when the mounting hole 127 is inserted into the protrusion 123 is small or the protrusion 123 does not deform to the outer mold, the hole 124 of the protrusion 123 is moved toward the center by a tool (punch). Can be fixed to the protrusion 123 by pushing the mounting hole 127 to the opposite side.

Further, by sandwiching the heat conductive grease, the heat conductive adhesive, the heat radiation sheet, etc. between the heat radiation fin 122 and the base plate 121, the adhesion between the heat radiation fin 122 and the base plate 121 is improved, and the heat radiation performance is further improved. Is also possible.

In the present embodiment, the case where one sheet metal is bent into a U shape to form two heat radiating plates 125 as the heat radiating fin 122 has been described, but one sheet metal is bent into an L shape. It may be formed. In this case, one side is the heat radiating plate 125 and the other side is the mounting portion 126.

FIG. 18 is a view of the main body cover portion 16.
The main body cover portion 16 has a substantially conical shape, and has a truncated cone shape in which the tip portion is cut and opened. The main body cover portion 16 may have a cylindrical shape, may be cylindrical, conical, prismatic, pyramidal, or trapezoidal, or may have a hollow tubular shape having any other shape.
The main body cover portion 16 has a main body cylinder portion 162 and a main body skirt portion 164. The main body cylinder portion 162 has a side surface of an inclined truncated cone. The shape of the main body skirt portion 164 is an annular band.

From the upper end of the main body cylinder portion 162, the main body top portion 161 is formed in a ring shape toward the center of the main body cover portion 16. The opening shape of the main body top 161 is circular. The top portion 161 of the main body has a screw hole 42 for fixing the exhaust cover portion 20.
The main body cylinder portion 162 and the main body skirt portion 164 are continuous with the main body ring portion 163 having a horizontal ring shape. The main body ring portion 163 has four screw holes 46, and the intake cover portion 17 is fixed by screws 33 or rivets.

The main body ring portion 163 has four hook portions 165. The hook portion 165 is obtained by cutting a part of the main body ring portion 163 into a tongue shape and bending it downward into a key shape. The tip of the hook portion 165 is arranged in parallel with the main body ring portion 163. The hook portion 165 is located at a position corresponding to the notch 178 of the intake cover portion 17. By aligning the hook portion 165 and the notch 178, the main body ring portion 163 and the outer collar portion 176 are brought into surface contact with each other, and the main body ring portion 163 and the outer collar portion 176 are rotated with each other, the main body ring portion 163 and the outer collar portion 176 The screw hole 46 and the screw hole 43 of the above are aligned with each other, and the intake cover portion 17 and the main body cover portion 16 are fixed by screwing with the screw 33.

FIG. 19 is a diagram of the exhaust cover portion 20.
The exhaust cover portion 20 has a substantially circular pyramidal shape, and a plurality of exhaust ports 204 are opened on the side surfaces thereof. The exhaust port 204 is an opening formed on the upper side surface 167 of the housing 50 in an inclined state. The exhaust port 204 exists inside the surface extending the side surface of the conical trapezoidal shape of the main body cover portion 16.

The exhaust cover portion 20 is attached to the main body top portion 161 of the top portion of the main body cover portion 16 by screws 32 or rivets.
The exhaust cover portion 20 has an exhaust top portion 201, an exhaust stack portion 202, and an exhaust flange portion 203.
The exhaust top portion 201 has one central opening for drawing out an electric wire, two screw holes 206 for fixing the dust avoiding cover portion 21, and four screw holes 207 for screwing the suspension body 60. In addition, there is an arc-shaped wire hole 208 through which the fall prevention wire is passed. The fall prevention wire will be described in the fourth embodiment.
The exhaust stack portion 202 has a plurality of exhaust ports 204. The inclination angle of the exhaust pipe portion 202 is substantially the same as the inclination angle of the main body cover portion 16, and the exhaust pipe portion 202 and the main body cylinder portion 162 have substantially parallel curved surfaces.
The exhaust flange portion 203 has four screw holes 205 through which the screws 32 pass, and the exhaust cover portion 20 is fixed to the main body cover portion 16 by the screws 32.
Convection is generated inside the main body cover portion 16 by exhausting the updraft inside the main body cover portion 16 from the exhaust port 204.

Hereinafter, the functions and effects of the intake port 171 and the exhaust port 204 will be described.
Since the main body cover portion 16 has a truncated cone shape, the convection inside the main body cover portion 16 is concentrated in the direction of the center of the circle from the lower side to the upper side. Due to the heat sink 12 (radiating fins 122), the lower side inside the main body cover portion 16 becomes a high temperature state, the air density becomes low, and buoyancy is generated because the density is lower than the outside of the main body cover portion 16. Due to this buoyancy, pressure is reduced below the main body cover portion 16, air flows in from the intake port 171 and the air heated by the heat sink 12 rises inside the main body cover portion 16 and is exhausted from the exhaust port 204. To.

In this way, the chimney effect can be utilized by the configuration of the heat sink 12 arranged inside the housing 50, the intake cover portion 17 and the exhaust cover portion 20 attached to the top and bottom of the main body cover portion 16, and the LED 142 can be used. The heat can be efficiently dissipated through the heat sink 12. Further, since the height H of the housing 50 is larger than the maximum diameter D of the housing, the housing 50 tends to exert the function of the chimney. Further, since the exhaust port 204 exists inside the surface extending the side surface of the truncated cone shape of the main body cover portion 16, it is easy to discharge the air collected in the central direction of the circle to the outside. Further, by utilizing the chimney effect, air can easily flow in from the intake port 171 and air can be efficiently convected between the heat radiating fins 122, so that the heat radiating effect due to the convection can be enhanced.
In order to make the chimney effect more effective, it is preferable to make the total area of the exhaust port 10% or more larger than the total area of the intake port. This is due to the heat and expansion of the air. Therefore, the number of heat radiation fins 122 can be reduced, and the weight of the luminaire 100 can be reduced.

Further, the position of the intake port 171 of the intake cover portion 17 and the end space 714 of the plurality of heat radiation fins 122 are set to substantially the same position. By doing so, the air taken in from the intake port 171 can smoothly flow between the heat radiating fins 122 without being blocked by other parts, so that it is possible to suppress a decrease in the air flow velocity. Therefore, the air flowing in from the intake port 171 can be convected so as to be in full contact with the surface of the heat radiation fin 122.

FIG. 20 is a view of the dust avoidance cover portion 21.
The dust avoidance cover portion 21 is arranged on the top surface 168 of the housing 50 and covers the upper portion of the exhaust port 204.
The diameter of the dust avoidance cover portion 21 is substantially the same as the diameter when the truncated cone-shaped side surface of the main body cover portion 16 is extended upward to the position of the dust avoidance cover portion 21. Therefore, although the main body cover portion 16 alone has a truncated cone shape, the three-dimensional shape formed by the outer lines of the main body cover portion 16 and the dust avoiding cover portion 21 also has a truncated cone shape, and exhibits an excellent design. ing. In other words, the exhaust port 204 may appear to be formed by reducing the diameter of a part of the upper side surface of the truncated cone shape formed by the outline of the main body cover portion 16 and the dust avoidance cover portion 21. it can.

An opening 219 is formed in a substantially central portion of the dust avoidance cover portion 21, and the opening 219 communicates with the inside of the housing 50. By using this opening 219, a power supply line or the like drawn from the outside can be drawn into the housing 50.

The shape of the dust avoidance cover portion 21 is dish-shaped.
A notch 218 notched in the radial direction is provided in a part of the opening 219, and a circular wire insertion hole can be formed by matching the wire hole 208 and the notch 218. The wire insertion hole will be described in the fourth embodiment.
The dust avoidance cover portion 21 is fixed to the exhaust cover portion 20 by aligning the wire hole 208 and the notch 218 and screwing the screw hole 216 and the screw hole 206 with screws or rivets.
Further, the dust avoidance cover portion 21 has four screw holes 217 through which screws 31 for fixing the suspension body 60 are passed.

The dust avoiding cover portion 21 is attached to the upper part of the exhaust cover portion 20 with screws to prevent dust from entering the inside of the housing 50 from the exhaust port 204 provided in the exhaust cover portion 20. The dust avoiding cover portion 21 has a size so that the exhaust port 204 of the exhaust cover portion 20 cannot be seen when viewed from the upper surface, so that dust can enter the main body cover portion 16 due to the fall of dust from the upper portion. It becomes possible to prevent.

FIG. 21 is a perspective view of the suspension body 60.
FIG. 22 is a three-view view of the suspension body 60.

The hanging body 60 has a ceiling mounting tool 61 attached to the ceiling, a housing mounting tool 63 attached to the housing, and a connecting portion 62 connecting the ceiling mounting tool 61 and the housing mounting tool 63.
The housing attachment 63 is detachably attached to the housing 50. Therefore, the hanging body 60 is detachably attached to the housing body 50.
The housing mounting tool 63 is screwed to the dust avoiding cover portion 21 of the housing 50 with four screws 31.

FIG. 23 is a diagram of the ceiling fixture 61.
The ceiling fixture 61 is hollow and has a flange 611, a bowl portion 613, and an insertion pipe portion 615.
The flange 611 has four screw holes 612 that are screwed to the ceiling.
The intubation section 615 has two pin through holes 614 and one screw hole 616.

FIG. 24 is a diagram of the connection portion 62.
The connecting portion 62 is a hollow pipe 625, but may be a chain or a wire.
The connecting portion 62 has pin holes 623 at both ends through which the pin 621 is passed. Also. The connecting portion 62 has screw holes 624 for screwing screws 622 for fixing the pins 621 at both ends.

FIG. 25 is a diagram of the housing attachment 63.
The housing attachment 63 is hollow and has a housing fixing portion 631 and an insertion tube portion 633.
The housing fixing portion 631 has two Dharma-shaped screw holes 632 and two screw holes 636 that are screwed to the housing 50. The reason why the Dharma type screw hole 632 is used is to loosen the screw without removing the screw so that the suspension body 60 can be removed and converted, and the working time can be shortened.
The intubation section 633 has two pin through holes 634 and one screw hole 635.

The exhaust cover portion 20 has four screw holes 207 (mounting portions) for fixing the four screws 31 for fixing the suspension body 60. The screw 31 passes through the screw hole 217 of the dust avoidance cover portion 21 and is screwed into the screw hole 207.
Instead of the screw hole 207, a hole may be made in the exhaust cover portion 20 and a stud nut or the like may be used. The suspension body 60 may be fixed by using other parts that can be attached and detached by the installer at the construction site.
Since the suspension body 60 attached to the exhaust cover portion 20 is attached to the attachment portion of the exhaust cover portion 20 of the housing 50 by a screw or the like, the installer can avoid dust on the suspension body 60 with a simple hand tool such as a screw driver. It can be removed from the cover portion 21.

Further, the dust avoidance cover portion 21 is formed with an opening 219 in the central portion, and the lead wire can be exposed from the opening 219. This lead-out electric wire is mechanically and electrically connected to the power supply electric wire from the ceiling by the construction of the builder, and is for supplying power to the light source module 14 provided in the luminaire.

Further, since the hanging body 60 attached to the dust avoiding cover portion 21 can be removed, a hanging body having another shape (for example, changing to a longer one) becomes easy.
The installer who attaches the luminaire 100 to the ceiling can remove the hanging body 60 and change it to another hanging body 60 according to the form of attaching the luminaire to the ceiling. For example, the housing 50 can be attached to a hanging body 60 such as a chain or an elevator.

In this way, the installer can remove the hanging body 60 of the luminaire 100 and change it to another fixture, so that the hanging body 60 is selectively attached to one type of luminaire. be able to.

In the present embodiment, the case where the hanging body 60 is attached to the dust avoiding cover portion 21 in advance has been described. However, the hanging body 60 and the dust avoiding cover portion 21 are separated in advance, and the hanging body 60 is used. You may install it later.
Further, the terminal block may be installed in the bowl portion 613 of the ceiling mounting tool 61.
Further, only the connection between the housing 50 and the hanging body 60 may be detachable, and the other connections may be made non-disassembleable by using rivets, soldering, an adhesive or the like.

FIG. 26 is a diagram showing another example of the exhaust port 204.
FIG. 26 shows a case where a plurality of exhaust ports 204 are horizontally formed on the main body top portion 161 of the main body cover portion 16.
By increasing the width of the main body top portion 161 of the main body cover portion 16 toward the center, a plurality of exhaust ports 204 can be formed in the main body top portion 161.
A housing mounting tool 63 is fixed to the main body top portion 161, and a dust avoiding cover portion 21 is fixed on the housing mounting tool 63. Since the dust avoidance cover portion 21 is arranged on the housing fixture 63, the dust avoidance cover portion 21 does not block the exhaust port 204 and is separated from the exhaust port 204 by the height of the housing fixture 63. It can cover the sky.

Although not shown, an annular ring portion 29 is provided at the position of the housing attachment 63 instead of the housing attachment 63, the dust avoidance cover portion 21 is fixed on the annular ring portion 29, and the dust avoidance cover portion 21 is placed on the dust avoidance cover portion 21. The housing attachment 63 may be fixed. The annular ring portion 29 is an annular member provided to separate the dust avoiding cover portion 21 from the exhaust port 204.

As described above, the exhaust port 204 of FIG. 26 is characterized in that the exhaust cover portion 20 is not provided and is arranged on the horizontal surface of the upper surface of the main body cover portion 16 of the housing 50.
Further, the exhaust port 204 may be formed on an inclined surface on the upper side surface of the main body cylinder portion 162 of the main body cover portion 16.
Further, the exhaust port 204 may be formed horizontally on the top surface 168 of the housing 50.

FIG. 27 is a diagram showing another example of the intake port 171.
As shown in FIG. 27, the outer cylinder portion 175 of the intake cover portion 17 has a truncated cone shape whose diameter decreases downward, and the intake port 171 is inclined to the side surface of the truncated cone (neither horizontal nor vertical). May be formed.

As described above, the intake port 171 does not have to be arranged in the direction perpendicular to the lower side surface of the housing 50, and the intake port 171 below the housing body 50 is arranged in an inclined state on the lower side surface of the housing body 50. You may be.
Further, for example, the intake port 171 may be formed not in the intake cover portion 17 but in the main body cylinder portion 162 of the main body cover portion 16.

FIG. 28 is a diagram showing another arrangement example of the heat radiation fins 122.
The heat radiation fin 122 of FIG. 28 shows a case where the radiation direction of the heat radiation plate 125 is tilted at a predetermined angle with respect to the radial direction of the base plate 121, and the heat radiation fin 122 is arranged in a spiral shape.

For example, the plurality of heat radiation fins 122 in FIG. 28 are arranged in the arrow direction (counterclockwise direction) with the central fin fixing portion 129 (central portion of the heat radiation fin 122) as the center among the three fin fixing portions 129 in the radial direction. ), It is rotated. The angles θ3 and θ4 (θ3 ≠ θ4) formed by the radial direction R passing through the center of the upper side of the heat radiating plate 125 (center K of the heat radiating plate) and the upper side of the heat radiating plate 125 are in the range of 1 degree or more and less than 25 degrees. In order to improve heat dissipation, the angles θ3 and θ4 are preferably 20 degrees or more and 25 degrees or less, and more preferably 23 degrees.
FIG. 36 is a diagram showing the relationship between the angle (hereinafter referred to as fin angle) formed by the radial direction R passing through the center of the upper side of the heat radiating plate 125 (center K of the heat radiating plate) and the upper side of the heat radiating plate 125 and the temperature of the LED 142. is there.
As shown in FIG. 36, the temperature decreases up to a fin angle of 23 degrees and then increases. When the fin angle reaches 27.5 degrees, the short sides on the center side of the adjacent heat radiation fins 122 come close to each other or come into contact with each other. When the fin angle is 34 degrees, the LED temperature is the same as the fin angle of 0 degrees.
Therefore, the fin angle is preferably in the range of 1 degree to 33 degrees, structurally preferably 1 degree or more and 27.5 degrees or less, preferably 20 degrees or more and 25 degrees or less, and 22 degrees or more and 24 degrees or less from the viewpoint of heat dissipation effect. Better, 23 degrees is even better.

As described above, when the angle exceeds 27.5 degrees, the distance between the heat radiating fins 122 in the central portion of the heat sink 12 is structurally narrowed, so that the heat radiating improvement effect cannot be sufficiently obtained. If the temperature is 27.5 degrees or more, it can be dealt with by reducing the radial length of the heat radiation fin 122, but in that case, the heat radiation area of the heat radiation fin 122 is reduced, so that the heat sink as a whole The heat dissipation capacity of the is reduced. Further, when increasing the fin area in order to reduce the radial length of the heat radiation fin 122 and make the heat radiation capacity equal, it is conceivable to increase the height of the heat radiation fin 122. Since the height of the device is high, the weight of the device as a whole increases.

In this way, by arranging the heat radiating fins 122 so that the radiating directions of the heat radiating fins 122 are at a predetermined angle with respect to the radial direction R instead of being radial to coincide with the radial direction R, the air flowing in from the intake port 171 In response to the heat of the heat radiating plate 125, the temperature rises to generate a spiral updraft, and in combination with the shape of the inner wall of the main body cover portion 16, the radiating action is improved by the chimney tunnel effect.

The rotation of the heat radiating fin 122 with respect to the radial direction R is not rotated around the fin fixing portion 129, but is rotated around the center of the long side 81 of the heat radiating fin 122 (the central portion of the heat radiating plate 125). May be good.
According to this example, the heat radiating action can be improved without increasing the weight of the heat radiating fin 122. That is, even a lightweight heat sink made of sheet metal can sufficiently dissipate the heat of the LED.

Embodiment 2.
FIG. 29 is a diagram of additional parts according to the second embodiment.
FIG. 30 is a right side fracture side view of the lighting fixture of the second embodiment.
FIG. 31 is an enlarged cross-sectional view of FIG.
Hereinafter, the points different from those of the first embodiment will be described.
In this embodiment, a case where the additional component 22 is attached to the lower part of the lighting fixture 100 will be described. Here, the additional component 22 refers to a component having an optional component arranged in the direction of the light emitted from the light source.

Optional parts are, for example,
(1) A guard that protects the light-transmitting cover, reflector, and light source module,
(2) A diffusion cover for diffusing the light emitted from the light source module (including the light reflected by the reflector),
(3) An additional reflector that controls light collection and light distribution,
Is.

In this embodiment, a case where a guard is used will be described as an example of optional parts. Further, as an example of the ventilation port, the case of the intake port 171 will be described.
The additional component 22 has a protective guard wire 223, a protective ring 224, and a protective collar 225.
The protective guard wire 223 is formed by welding a cross metal rod made of a steel wire such as SUS and two metal rings.
The protective ring 224 is an annular metal outer frame.
The protective ring 224 has four fixtures 221 at 90 degree intervals.
The fixture 221 has a flat plate-shaped lower contact portion 227 protruding toward the center at the lower portion, and an insertion member 226 composed of screws screwed toward the center at the upper portion.
The protective collar 225 is a horizontal ring provided inside from the lower end of the protective ring 224. The end of the metal rod of the protective guard wire 223 is welded to the protective collar 225.

As described above, the additional component 22 has four attachments 221 that are detachably attached to the intake port 171 and are detachably attached to the housing 50 by the attachments 221. It should be noted that the number of fixtures 221 may be three or more around the periphery.

The insertion member 226 can be inserted and removed from one intake port 171.
The insertion member 226 is, for example, a screw, which is inserted into the intake port 171 and inserted into the lower end portion of the intake port 171.
The lower contact portion 227 is a member that hits the lower surface of the middle ring portion 174 of the intake cover portion 17, and is a member that restricts the insertion member 226 from moving upward through the intake port 171.

The insertion member 226 does not have to be a screw, but may be an elastic body fitted into the intake port 171. This elastic body is provided so as to project toward the center C of the additional component 22 in a state of being elastically deformable, and its end portion is formed by being bent downward in a J-shape (fishhook shape). The elastic body is screwed into the intake port 171 and elastically deformed, and when the tip portion thereof finishes fitting into the intake port 171, the elastic deformation is released and the tip portion cannot be removed from the intake port 171. Further, when the tip portion is fitted into the intake port 171, the elastic end portion bent downward in a J shape is caught by the lower end of the intake port 171 due to the weight of the additional component 22, and the additional component 22 is the intake cover. The state of being attached to the portion 17 can be maintained. When the additional component 22 is removed from the intake cover portion 17, the elastic body can be elastically deformed and the tip portion thereof can be removed from the intake port 171.

As described above, the additional component 22 can be attached / detached without providing a special attachment mechanism to the housing 50 (intake cover portion 17 or the like) of the lighting fixture 100.

If the optional component is a diffusion cover or a reflector, the diffusion cover or the reflector may be attached to the protective collar 225.
That is, when the optional member is a diffusion cover, the protective guard wire 223 is changed to a diffusion cover. The diffusion cover may be used with the protective guard wire 223. The diffusion cover is a milky white cover such as polycarbonate (PC) or polymethyl methacrylate resin (PMMA), and is a resin cover containing a diffusion material.
Similarly, when the optional component is a reflector, the protective guard wire 223 is changed to a reflector. A rotating radiation surface is created on the reflector by aluminum drawing (spinning), etc., and by making the surface a mirror surface or white finish, it is possible to collect light and block light (glare suppression). ..
In the case of any of the optional parts, the protective ring 224 and the protective collar 225 have a common configuration and function.

This embodiment is characterized in that the intake port 171 is provided with the function of "ventilation + attached portion", so that the additional component 22 is attached to the housing 50 without making any changes. is there.
The fixture 221 may have a detachable member whose end can be inserted and removed from two adjacent intake ports 171.
Further, the detachable member may be a member that can be attached / detached to / from the opening forming portion 177 between the intake port 171 and the intake port 171.

As another mounting example, the additional component 22 may be mounted on the main body ring portion 163 of the main body cover portion 16 or the main body skirt portion 164. At that time, it is desirable to attach the fixture 221 without changing the shapes of the main body ring portion 163 and the main body skirt portion 164.

FIG. 32 is a diagram showing another example of the additional component.
The additional part 22 of FIG. 32 is obtained by welding the fixture 221 directly to the tip of the cross metal rod of the protective guard wire 223.

Embodiment 3.
FIG. 33 is a diagram showing the lighting fixture 100 of the third embodiment.
Hereinafter, the differences from the first and second embodiments will be described.

The luminaire 100 has a hanging body 70 above the housing body 50.
The suspension body 70 is also detachably attached to the housing body 50 in the same manner as the suspension body 60 described above. That is, the builder can attach the suspension body 70 to the housing body 50 at the time of construction.

The suspension body 70 has a connecting portion 72 and a ceiling-side mounting portion 73.
The connecting portion 72 is a columnar metal cylinder, but may be a rectangular parallelepiped metal box.
A power supply circuit 71 is built in the connection portion 72.
The power supply circuit 71 has an AC-DC conversion function that inputs AC from an electric wire from the ceiling and outputs DC supplied to the light source module 14.

The ceiling side mounting portion 73 is a metal plate bent into a key shape at four locations. The central plate of the ceiling-side mounting portion 73 has an electric wire hole 75 through which an electric wire is passed. Both end plates of the ceiling side mounting portion 73 have mounting holes 76 for fixing the lighting fixture 100 to the lifting parts of the electric lifting device.

In the lighting fixture 100 of this embodiment, since the connection portion 72 has a built-in power supply circuit 71, it is not necessary to install the power supply circuit behind the ceiling.
Further, since the connection portion 72 has a built-in power supply circuit 71, AC can be input, and the lighting fixture 100 can be attached to an existing electric lifting device having an AC power supply and providing a commercial power supply.

Embodiment 4.
FIG. 34 is a diagram showing the lighting fixture 100 of the fourth embodiment.
FIG. 35 is a diagram of the first fall prevention wire 231 and the second fall prevention wire 232 of the fourth embodiment.
Hereinafter, the points different from the first, second, and third embodiments will be described.

The base plate 121 of the heat sink 12 has a fall prevention insertion hole 236 through which the first fall prevention wire 231 is passed in the central portion near the opening. For example, the inner diameter of the fall prevention insertion hole 236 is 3.5 mm. The fall prevention insertion hole 236 functions as a fall prevention wire attachment portion.
The exhaust cover portion 20 has a wire hole 208 through which the first fall prevention wire 231 is passed.
The dust avoidance cover portion 21 has a notch 218 through which the first fall prevention wire 231 is passed.
A substantially circular wire insertion hole 237 is formed by crossing the arcuate wire hole 208 of the exhaust cover portion 20 and the radial notch 218 of the dust avoidance cover portion 21. For example, the inner diameter of the wire insertion hole 237 is 3 mm.
The first fall prevention wire 231 has a fastening portion 238 at the lower end, and a detachable first fastener 233 is attached to the upper end.
The second fall prevention wire 232 is equipped with a removable second fastener 234 at the lower end, and a ring-shaped fixing ring 239 is formed at the upper end.

The fall prevention insertion hole 236 has a diameter larger than the diameter of the first fall prevention wire 231, and the fastening portion 238 and the first fastener 233 have an outer diameter larger than the diameter of the fall prevention insertion hole 236. ..
The wire insertion hole 237 has a diameter larger than the diameter of the first fall prevention wire, and the fastening portion 238 and the first fastener 233 are larger than the diameter of the fall prevention insertion hole 236 and the wire insertion hole. It has an outer diameter larger than the diameter of 237.
It is desirable that the fall prevention insertion hole 236 and the wire insertion hole 237 are formed so as to exist above and below the same vertical line.

The fastening portion 238 at the lower end of the first fall prevention wire 231 is a ring component formed in a ring shape. For example, a metal ring having an outer diameter of 5 to 6 mm is attached to the end as a fastening portion 238. When the first fall prevention wire 231 is passed through the fall prevention insertion hole 236 of the base plate 121 from the upper end of the first fall prevention wire 231 to which the first fastener 233 is not attached, finally, this fastener is made. The portion 238 is hooked on the fall prevention insertion hole 236. The fastening portion 238 may be larger than the hole diameter of the fall prevention insertion hole 236, and the shape is not limited to the ring shape.
That is, the fastening portion 238 may have a shape that allows it to be caught without passing through the fall prevention insertion hole 236.

The upper end of the first fall prevention wire 231 is folded back and the tip portion is fixed to the fall prevention wire itself with a crimp terminal or the like, and a ring-shaped wire ring 235 is formed at the upper end of the first fall prevention wire 231. The reason why the wire hole 208 of the exhaust cover portion 20 is an arc-shaped elongated hole is to facilitate the passage of the ring-shaped wire ring 235. The reason why the notch 218 of the dust avoidance cover portion 21 is notched in the radial direction is to close the arcuate elongated hole of the wire hole 208 other than the portion serving as the wire insertion hole 237. The notch 218 of the dust avoidance cover portion 21 does not have to be a notch, and may be a long hole in the radial direction.

The wire ring 235 is in a state through which the fall prevention insertion hole 236 of the heat sink 12 and the wire insertion hole 237 on the upper part of the housing can be passed.
After inserting the wire ring 235 into the fall prevention insertion hole 236 and the wire insertion hole 237, the first fastener 233 is attached to the wire ring 235.
Both the first fastener 233 and the fastener 238 are used so that they cannot pass through the fall prevention insertion hole 236 and the wire insertion hole 237.
The wire ring 235 may not come off from the wire insertion hole 237 formed by the wire hole 208 of the exhaust cover portion 20 and the notch 218 of the dust avoidance cover portion 21. By preventing the wire ring 235 from coming out of the wire insertion hole 237, the first fall prevention wire 231 will not come off from the wire insertion hole 237 even without the first fastener 233.

Inside the suspension body 60, a second fall prevention wire 232 different from the first fall prevention wire 231 attached to the base plate 121 is inserted. A ring-shaped wire ring 230 is formed at the lower end of the second fall prevention wire 232, a second fastener 234 is attached, and the fixing ring 239 at the upper end of the second fall prevention wire 232 is fixed to the screw boss 619. Will be done.

The housing attachment 63 has a screw boss 619 for fixing the fixing ring 239 of the second fall prevention wire 232. The screw boss 619 is a boss having a screw hole formed toward the flange 611 inside the bowl portion 613, and the second fall prevention wire 232 is fixed to the housing attachment 63 by hooking the fixing ring 239 on the screw boss 619. To do. After hooking, close it with a metal fitting and screw the metal fitting to the screw boss 619 so that the fixing ring 239 does not come off from the screw boss 619. A ring (corresponding to the fastening portion 238) is attached to the fixed ring 239 to form a hole (corresponding to the fall prevention insertion hole 236) such as a fall prevention insertion hole 236 in the housing mounting tool 63 to form a ring of the fixed ring 239. The second fall prevention wire 232 may be attached to the housing fixture 63 by hooking the hole.

The second fall prevention wire 232 is passed from the screw boss 619 of the flange 611 of the ceiling mounting tool 61 to the connecting portion 62, passed to the housing fixing portion 631 of the housing mounting tool 63, and penetrates the suspension body 60. The housing fixing portion 631 may be provided with a fixing portion for fastening the second fall prevention wire 232 so that the second fall prevention wire 232 does not return to the pipe of the connecting portion 62.

The second fall prevention wire 232 is connected to the first fastener 233 of the first fall prevention wire 231 attached to the base plate 121 by the second fastener 234. As the first fastener 233 and the second fastener 234, a Naskan, a screw joint, a screw type stainless wire ring or the like can be selected.
Although the example in which the first fastener 233 and the second fastener 234 are present has been described, only the first fastener 233 may be used. When only the first fastener 233 is used, the first fastener 233 may be attached to the wire ring 230.

As described above, the heat sink 12 has a fall prevention insertion hole 236 having a diameter larger than the diameter of the first fall prevention wire 231, and the first fall prevention wire 231 falls to the end portion attached to the heat sink 12. Since the fastening portion 238 has an outer diameter larger than the diameter of the prevention insertion hole 236, the fastening portion 238 cannot pass through the fall prevention insertion hole 236 and can prevent the housing 50 from falling.

Further, the housing 50 has a wire insertion hole 237 having a diameter larger than the diameter of the first fall prevention wire 231, and the first fall prevention wire 231 cannot pass through the wire insertion hole 237. Therefore, it is possible to prevent the first fall prevention wire 231 from falling into the housing 50.

In this way, since the two fall prevention wires are connected by one or two fasteners, the hanging body 60 attached to the dust avoidance cover portion 21 and the housing body 50 can be attached and detached, and the inside of the housing body 50 can be attached and detached. The wire can be easily inserted.

Further, the housing body 50 and the suspension body 60 can be attached / detached at the construction site at the time of construction, and at that time, the fall prevention mechanism can also be attached / detached at the construction site by the two fall prevention wires.

Further, since the first fall prevention wire 231 is attached to the inside of the housing 50 and the second fall prevention wire 232 is attached to the inside of the suspension body 60, the fall prevention wire cannot be seen from the appearance of the lighting fixture 100. The design can be improved.

Further, even if the fall prevention insertion hole 236 is damaged and the first fall prevention wire 231 is removed from the fall prevention insertion hole 236, the fastening portion 238 is caught in the wire insertion hole 237 to prevent the housing 50 from falling. be able to. Therefore, the wire insertion hole 237 also has a function as a fall prevention wire attachment portion, similarly to the fall prevention insertion hole 236.

Further, since the second fall prevention wire 232 is attached to the ceiling mounting tool 61, it is possible to prevent the connecting portion 62 and the housing mounting tool 63 from falling. Even if the connecting portion 62 is a chain, the ceiling fixture 61 at the top of the chain and the housing 50 are connected by a wire, so that even if the chain should be damaged, the housing 50 can be prevented from falling.

If the second fall prevention wire 232 is extended to the ceiling and fixed to the beam behind the ceiling, the entire lighting fixture 100 can be prevented from falling.

100 Lighting equipment, 12 Heat sink, 13 Heat dissipation insulation sheet, 14 Light source module, 15 Reflector, 16 Main body cover, 17 Intake cover, 18 Packing, 19 Light transmissive cover, 20 Exhaust cover, 21 Dust avoidance cover, 22 Additional parts, 23 Fall prevention mechanism, 24 Power supply circuit, 29 Ring ring, 31 screws, 32 screws, 33 screws, 34 screws, 35 screws, 41 screw holes, 42 screw holes, 43 screw holes, 44 screw holes, 45 Screw holes, 50 housings, 60 suspensions, 61 ceiling fixtures, 62 connections, 63 housing fixtures, 70 suspensions, 71 power supply circuits, 72 connections, 73 ceiling side mountings, 75 wire holes, 76 mounting holes, 81 long side, 82 short side, 83 diagonal side, 84 inner cut part, 85 outer cut part, 99 tension stop, 121 base plate, 122 heat radiation fin, 123 protrusion, 124 hole, 125 heat radiation plate, 126 mounting part, 127 mounting hole, 129 Fin fixing part, 711 front side, 712 back side, 713 hole edge part, 714 end space, 131 screw hole, 141 board, 142 LED, 143 board edge part, 144 connector, 145 wiring, 146 wire, 147 screw avoidance cut part 148 Diagonal cut part, 149 Positioning notch, 151 Mounting part, 152 Opening part, 153 Board pressing part, 154 Reflecting part, 155 Power supply tunnel, 156 Front side, 157 Back side, 159 Positioning pin, 161 Main body top part, 162 Main body cylinder part , 163 Main body ring part, 164 Main body skirt part, 165 Hook part, 166 Lower side, 167 Upper side, 168 Top surface, 171 Intake port, 172 Inner flange part, 173 Inner cylinder part, 174 Middle ring part, 175 Outer cylinder part , 176 Outer flange, 177 Opening, 178 Notch, 201 Exhaust top, 202 Exhaust stack, 203 Exhaust flange, 204 Exhaust port, 205 Screw hole, 206 Screw hole, 207 Screw hole, 208 Wire hole, 211 Dust avoidance top, 212 Dust avoidance slope, 216 screw holes, 217 screw holes, 218 notches, 219 openings, 221 fixtures, 222 optional items, 223 protective guards Threaded wire, 224 protective ring, 225 protective flange, 226 insertion member, 227 bottom pad, 231 first fall prevention wire, 232 second fall prevention wire, 233 first fastener, 234 second fastener 235 Wire ring, 236 Fall prevention insertion hole, 237 Wire insertion hole, 238 Fastening part, 239 Fixed ring, 611 flange, 612 screw hole, 613 bowl part, 614 pin through hole, 615 Insert pipe part, 616 screw hole, 621 Screw boss, 621 pin, 622 screw, 623 pin hole, 624 screw hole, 625 pipe, 631 housing fixing part, 632 Dharma type screw hole, 633 insertion tube part, 634 pin through hole, 635 screw hole, 636 screw hole, 666 metal Box, 667 metal cylinder, C center, R radial direction, H height, D maximum diameter, BW substrate thickness, RW reflector thickness, AW substrate pressing part thickness, K radiator plate center.

Claims (8)

It has a mounting part that is fixed to the base plate and a heat sink that is continuous with the mounting part.
The mounting portion is in close contact with the base plate in a state of surface contact throughout.
The mounting portion has a plurality of mounting holes used for fixing to the base plate.
The heat radiating plate is a heat radiating fin having a cut portion forming a space between the heat radiating plate and the base plate. It has a mounting part fixed to the base plate and a heat sink that is continuous with the mounting part on all sides.
The heat radiating plate has a cut portion that forms a space between the heat radiating plate and the base plate in order to avoid screws attached to the base plate.
The mounting portion is continuous with the heat sink except for the cut portion.
The cut portion is a heat radiation fin having notches of different sizes cut in an L shape at both ends on the lower side where the mounting portion is located. It has a mounting part that is fixed to the base plate and a heat sink that is continuous with the mounting part.
The heat radiating plate has a cut portion that forms a space between the heat radiating plate and the base plate.
The mounting portion has a trapezoidal shape, has a plurality of mounting holes arranged in a linear direction in the center of the trapezoidal shape, and is formed on one side of one sheet metal bent by a bending line.
The heat radiating plate is formed on the other side of the bent sheet metal.
The cut portion is a heat radiation fin existing at at least one end of the bending line. It has a mounting part that is fixed to the base plate and a heat sink that is continuous with the mounting part.
The mounting portion has a fixing mechanism that is brought into close contact with the base plate in a state of surface contact over the entire surface and fixed to the base plate.
The heat radiating plate is a heat radiating fin having a cut portion forming a space between the heat radiating plate and the base plate. The heat radiating fin according to any one of claims 1 to 4,
A heat sink provided with a base plate in which a plurality of heat radiation fins are arranged radially. The heat sink according to claim 5 , wherein the cut portion has an outer cut portion formed on the outside of the heat radiating plate. The heat sink according to claim 5 or 6 , wherein the cut portion has an inner cut portion formed inside the heat radiating plate. A truncated cone-shaped luminaire
The heat sink according to any one of claims 5 to 7.
With the light source fixed to the base plate,
A dish-shaped dust avoiding cover portion that covers the upper part of the heat sink is provided.
The diameter of the dust avoidance cover portion is substantially the same as the diameter when the side surface of the truncated cone shape is extended upward to the position of the dust avoidance cover portion.

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