JP2020031069A - Radiation fin, heat sink, and lighting apparatus - Google Patents

Abstract

To provide a radiation fin suitable for a heat sink.SOLUTION: A radiation fin 122 has a mounting portion 126 fixed to a base plate, and a radiation plate 125 continued from the mounting portion, and the radiation plate 125 has a cut portion (inner cut portion 84, outer cut portion 85) forming a space with the base plate. The cut portion (inner cut portion 84, outer cut portion 85) is a cutout part cut into the L-shape at an end portion at a lower side on which the mounting portion 126 is disposed. The mounting portion 126 is formed by one side of a sheet of sheet metal bent at a folding line, the radiation plate 125 is formed by the other side of the bent sheet metal, and the cut portion (inner cut portion 84 outer cut portion 85) exists on at least one end portion of the folding line.SELECTED DRAWING: Figure 17

Description

  The present invention relates to a radiation fin and a lighting device including a heat sink having the radiation fin. In particular, it relates to a lighting fixture suspended from a ceiling.

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

  In addition, there is a heat sink that is provided with a plurality of radiating fins formed by being bent in a U-shape to form a radiating unit (for example, Patent Document 2). According to this heat sink, since air flows in from the outer peripheral side and the lower end side of the circumferentially arranged heat sink and is convected upward as it is, the heat of the LED can be efficiently radiated by the heat sink.

  In addition, there is a heat sink for attaching a radiation fin to a supporting substrate with a heat conductive member (for example, Patent Document 3).

  In addition, there is a lighting device in which a guard is attached to a light source side of a main body in order to prevent a light source from a collision with a ball when the LED lighting device is mounted on, for example, a ceiling of a gymnasium (for example, Patent Document 4).

  Further, there is a lighting device that uses a wire to prevent the reflecting mirror from falling, and a connector is provided in the lighting device to prevent the reflecting mirror from falling (for example, Patent Document 5).

Further, there is a lighting fixture in which a fixture main body is fixed to a mounting portion such as a ceiling with a hanging pipe or the like (for example, Patent Documents 6 to 8).
In addition, there is a lighting fixture in which a fixture main body is hung on an attached portion such as a ceiling by a hanging tool such as a chain (for example, Patent Documents 9 to 11).

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

  In a conventional lighting fixture, a plurality of LED boards are arranged in a circumferential direction, and each LED board is fixed with a reflector, so that the workability of attaching the reflector is inferior. In addition, since a plurality of reflectors are attached to the heat sink, a gap is formed between adjacent reflectors, resulting in poor design.

  Further, when the air inlet is provided so that air flows in from the outer peripheral side and the lower end side of the heat sink arranged in the circumference, there is a problem that the outer shell of the lighting fixture (circular shape of the light emitting portion) becomes large.

  In addition, when the heat sink is made of sheet metal, mechanical bonding between the base plate and the radiating fins is weak, and when heat is transferred between the base plate and the radiating fins due to weak mechanical bonding force, There has been a problem that the thermal resistance increases.

  In addition, when attaching a guard for protection, it is necessary to provide a guard attaching portion on the main body portion. When the guard is not attached to the lighting fixture (main body), the guard attaching portion is an unnecessary part. Projecting into the outer shell of the main body, the design was inferior.

  In addition, when a wire for preventing the fall is attached to the outside of the reflecting mirror, there is a problem that the design is inferior, and when a connecting tool is provided in the fixture, a process of assembling the reflecting mirror, the main body and the connecting tool becomes complicated. There was a problem that.

  In addition, since the method of mounting the conventional lighting fixture for hanging on the ceiling is determined, it is necessary to prepare a plurality of models of the lighting equipment according to the mounting method on the ceiling.

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

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

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

FIG. 3 is a perspective view (perspective view from four directions) showing the lighting fixture of the first embodiment. It is a three-view drawing of a lighting fixture. It is a left side cutaway side view of a lighting fixture, and a central part omitted bottom view. It is an exploded perspective view of a lighting fixture. FIG. 3 is a light source module 14 and its connection diagram. FIG. 3 is a diagram of an intake cover section 17. FIG. 4 is a diagram of a light-transmitting cover portion 19. It is a figure of packing 18. FIG. 3 is a view of a reflector 15. FIG. 3 is a perspective view in which five light source modules 14 are attached to a reflector 15. FIG. 4 is a rear view in which four light source modules 14 are attached to a reflector 15. FIG. 3 is a diagram in which a reflector 15 is attached to a heat sink 12. FIG. 3 is a positional relationship diagram between the light source module 14 and the heat sink 12. It is a figure of a heat dissipation insulating sheet 13. FIG. 3 is a view of a heat sink 12. FIG. 3 is a view of a base plate 121 of the heat sink 12. FIG. 3 is a view of a radiation fin 122 of the heat sink 12. FIG. 3 is a diagram of a main body cover unit 16. FIG. 4 is a view of an exhaust cover unit 20. FIG. 3 is a view of a dust avoiding cover section 21; FIG. 3 is a perspective view of a suspension body 60. FIG. 3 is a three-view drawing 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 fixture 63. FIG. 9 is a view showing another example of the exhaust port 204. FIG. 14 is a view showing another example of the intake port 171. It is a figure showing other examples of arrangement of a radiation fin 122. It is a figure of additional component 22 of Embodiment 2. FIG. 10 is a right side cutaway side view of the lighting fixture 100 according to the second embodiment. FIG. 31 is a partially enlarged view of FIG. 30 of the second embodiment. FIG. 14 is a diagram illustrating another example of the additional component 22 according to the second embodiment. It is a figure showing lighting fixture 100 of Embodiment 3. FIG. 14 is a diagram showing a lighting fixture 100 according to a fourth embodiment. It is a figure of a fall prevention wire of Embodiment 4. FIG. 29 is a diagram illustrating the relationship between the fin angle of the radiation fin 122 and the temperature of the LED 142 in FIG. 28.

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

The lighting fixture 100 has a housing 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 has a main body cover 16, an intake cover 17, a light-transmitting cover 19, an exhaust cover 20, and a dust avoiding cover 21.

The relationship and function of each cover part of the lighting fixture 100 are as follows.
(1) a main body cover 16 that covers the heat sink 12;
(2) an intake cover portion 17 attached to the main body cover portion 16 and formed with an intake port 171 for taking in air in the main body cover portion 16;
(3) a light-transmitting cover 19 attached to the inside of the intake cover 17 via a packing 18;
(4) an exhaust cover section 20 attached to the main body cover section 16 and formed with an exhaust port 204 for exhausting air inside the main body cover section 16;
(5) A dust avoiding cover 21 attached to the exhaust cover 20 to prevent dust from entering through the exhaust port 204.

The housing 50 contains the following.
(1) Heat sink 12,
(2) heat radiation insulating sheet 13,
(3) Five light source modules 14 attached to the heat sink 12 via the heat radiation insulating sheet 13;
(4) One reflector 15 for fixing the light source module 14 to the heat sink 12.

The suspension body 60 is a pillar part that is attached to the exhaust cover part 20 so as to sandwich the dust avoiding cover part 21 and that is fixed to the ceiling.
The suspension body 60 has a ceiling fixture 61, a connection part 62, and a housing fixture 63.

FIG. 5 is a light source module 14 and its wiring connection diagram.
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 obtained 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 board 141.

The substrate 141 has three screw avoiding cut portions 147. The two screw avoiding cut portions 147 are formed by cutting adjacent corners of the substrate 141 into a fan shape (a quarter circle shape). One screw avoiding cut portion 147 is obtained by cutting the substrate 141 between the connectors 144 into a substantially semicircular shape.
The substrate 141 has two oblique cut portions 148. The oblique cut portion 148 is a portion obliquely cut out of the board 141 on both sides of the connector 144.
At the center of both sides of the substrate 141, there are positioning notches 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 octagon or a circle as a whole.
A board edge 143 exists around the plurality of LEDs 142, and no elements or wires exist on the board edge 143.
The connector 144 is a terminal supplied with power from the electric wire 146. After the electric wire 146 is connected to the connector 144, the electric wire 146 is fixed to the housing 50 by a tension stopper 99 to prevent a tension from being applied. The wiring 145 is a circuit pattern or an electrode pad formed on the substrate 141.
The rear surface of the light source module 14 is flat to maximize the heat radiation area, and no elements are mounted on the rear surface.

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

An inner flange portion 172 is formed from the upper end of the inner cylinder portion 173 toward the center. The opening shape of the inner flange portion 172 has the shape of a flower having five petals.
The inner cylindrical portion 173 and the outer cylindrical portion 175 are continuous at 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 being in contact with the middle ring portion 174 at the surface, thereby improving the heat radiation effect.
A plurality of intake ports 171 are formed in the outer cylinder part 175 by a plurality of opening forming parts 177. As described above, the housing 50 has the plurality of intake ports 171 in the lower 360-degree direction.

A plurality of intake ports 171 are formed on the side surface of the housing 50 surrounding the heat sink 12.
The intake port 171 is formed on the lower surface of the housing 50 in a vertical direction, and the shape of the intake port 171 is rectangular.

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

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

When air flows in from the air inlet 171 of the air intake cover 17, air flows between the radiation fins 122 arranged inside the main body cover 16. The air sucked from the air inlet 171 on the side surface of the air inlet cover 17 blows in a lower side and a lateral direction (diagonally upward) of the heat sink 12 (radiation fin 122), and is heated by heat of the heat sink 12 (radiation fin 122). While rising.
It is preferable that the arrangement of the air intake port 171 is set in accordance with the arrangement of the heat radiation fins 122 of the heat sink 12 such that the air intake port 171 faces between the heat radiation fins 122.

FIG. 7 is a diagram of the light-transmitting cover portion 19.
The light transmissive cover 19 is made of resin or glass having a light transmissivity of 85% or more. The shape of the light transmissive cover 19 is a disk.
Further, an antistatic treatment or a scattering prevention treatment is performed according to the use environment.

FIG. 8 is a diagram of the packing 18.
The packing 18 is made of an annular elastic rubber. As the elastic rubber, for example, silicon rubber is used. The packing 18 has a U-shaped cross section in the radial direction, and the outer peripheral edge of the light-transmitting cover 19 is inserted inside. The outer diameter of the packing 18 to which the light transmissive cover 19 is attached is equal to or less than the inner diameter of the inner cylindrical portion 173, and is desirably 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 elastically deformed by being sandwiched between the inner flange portion 172 and the light-transmitting cover portion 19. The light transmissive cover 19 is fixed between the inner flange 172 and the reflector 15 by being sandwiched between the cover 19. Since the packing 18 is elastically deformed and fixed, dust can be prevented from entering.

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 diagram showing a positional relationship between the opening 152 and the LED 142 with the substrate 141 removed.
FIG. 11 is a rear view in which four light source modules 14 are attached to the reflector 15.
FIG. 12 is a diagram 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 radiation insulating sheet 13.

On the side of the front surface 156 of the reflector 15, the light transmissive cover 19 is arranged.
On the side of the back surface 157 of the reflector 15, the light source module 14, the heat radiation insulating sheet 13, and the heat sink 12 are arranged.
The surface 156 of the reflector 15 is finished flat and reflects light by 90% or more by white or silver (mirror surface) finishing.
The reflector 15 has a disk shape with five openings. The reflector 15 is formed of a resin. The LED 142 is exposed from 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 17, the reflector 15 is disposed inside the inner cylindrical portion 173. These dimensional relationships are as follows.
Thickness of reflector 15 + thickness of light-transmitting cover portion 19 + thickness of packing 18> height H1 of inner cylinder portion 173
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 H1 of inner cylinder 173
Becomes For this reason, the light-transmitting cover 19 is securely fixed inside the inner cylinder 173.

  The reflector 15 has five openings 152 formed therein. The five openings 152 are arranged in a ring shape on the reflector 15 such that the reflection portions 154 of the adjacent openings 152 are in contact with each other. Since the five openings 152 are uniformly arranged annularly around the center C of the reflector 15, the five openings 152 are arranged with a center angle of 72 degrees.

Although the opening shape of the opening 152 is preferably circular, an octagon, a hexagon, or the like is used for efficient placement of the opening 152 in the reflector 15 or efficient placement of the plurality of LEDs 142 in the opening 152. , Trapezoids and triangles.
The opening 152 has a reflecting portion 154 inclined from the front surface 156 to the back surface 157 of the reflector 15, and a substrate pressing portion 153 standing upright from the reflecting portion 154 to the back surface 157.

The inclination angle of the reflecting section 154 is, for example, 45 degrees with respect to the surface.
The board pressing portion 153 is for pressing the board edge 143 to the heat sink 12. The substrate pressing portion 153 is further bent 45 degrees to the back surface side from the reflection 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 contacts the surface of the substrate 141.
It is desirable that the reflecting portion 154 and the substrate pressing portion 153 be formed all around the opening 152 (360 degrees).

  As described above, the reflector 15 has the substrate pressing portion 153 on which the substrate 141 is disposed on the back surface 157. The substrate pressing portion 153 is a region where the substrate 141 is disposed, and is a concave region that is depressed 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 substantially the thickness of the substrate 141.

For example, these dimensional relationships are as follows.
Thickness RW of reflector 15 <thickness AW from surface 156 to substrate pressing portion 153 + thickness BW of substrate 141
Or,
Depth F of recess of substrate pressing portion 153 from back surface 157 <thickness BW of substrate 141
That is, the substrate pressing portion 153 is recessed from the rear surface 157 by a depth F less than the thickness BW of the substrate 141. By setting the amount of depression of the substrate pressing portion 153 to be less than the thickness of the substrate 141, when the substrate 141 is disposed on the substrate pressing portion 153 and the reflector 15 is fixed to the heat sink 12, the substrate 141 is securely pressed against the heat sink 12. 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 avoiding 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 a screw 34.

On both sides of the opening 152, two positioning pins 159 for positioning the light source module 14 are formed 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 pins 159 and the positioning notches 149. That is, the screw avoiding 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 avoiding cut portion 147 is substantially semicircular corresponding to the cylindrical boss outer shape of the mounting portion 151. It is cut into a shape. Further, since the position and the shape of the screw avoiding cut portion 147 correspond to the mounting portion 151, the pressing force of the reflector 15 and the heat sink 12 by the mounting portion 151 can be efficiently transmitted to the substrate 141. In addition, in order to improve the transmission of the crimping force, it is desirable that four or more mounting portions 151 exist at corners of the substrate 141 or the like.

In this manner, the substrate 141 is fixed by pressure bonding between the reflector 15 and the heat sink 12 via the heat radiation insulating sheet 13 by fixing the mounting portion 151 to the heat sink 12 with screws.
Then, the substrate edge 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 supply tunnels 155 through which two wires 145 (electric wires 146) pass. The power supply tunnel 155 is a portion (a portion not in contact with the substrate 141) that is further depressed than the substrate pressing portion 153 in order to pass the wiring 145 (or the electric wire 146). Further, a bulge covering the connector 144 and the element may be formed in the power supply tunnel 155 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 of manufacturing and assembling the heat sink 12 and the reflector 15 will be described.
The reflector 15 has a plurality of openings 152 formed so that the opening edges (the substrate pressing portions 153) come into contact with the substrate edges 143 of the substrate 141 of the light source module 14, and surrounds the periphery of one opening 152. Molding is performed 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 that the wiring shown in FIG.
The light source module 14 is attached to the substrate pressing portion 153 such that the substrate pressing portion 153 contacts the substrate edge 143 of the substrate 141. At this time, the positioning notch 149 and the positioning pin 159 are aligned so that the connector 144 of the light source module 14 is located on the center side of the reflector 15. Thus, the light source module 14 is accurately positioned on the substrate pressing portion 153. An adhesive or a double-sided tape may be placed on the substrate pressing portion 153, and the light source module 14 may be temporarily fixed to the substrate pressing portion 153.
Further, the reflector 15 may be formed in a claw shape to fix the light source module 14. In that case, the heat sink 12 and the heat radiation insulating sheet 13 are provided with claw-shaped relief portions.

As shown in FIG. 11, the light source module 14 is disposed such that the oblique cut portions 148 are adjacent to each other. If the oblique cut portion 148 is provided, the light source module 14 can be disposed closer than when the oblique cut portion 148 is not formed.
Next, the reflector 15 is attached to the base plate 121 with the heat radiation insulating sheet 13 interposed therebetween. Next, the reflector 15 is fastened to the heat sink 12 (base plate 121) by screwing the screw 34 into the screw mounting hole of the mounting portion 151, and the substrate pressing portion 153, which is the opening edge of the opening 152, is connected to the substrate 141. The substrate 141 is pressed against the heat dissipation insulating sheet 13, so that the substrate 141 is fixed to the base plate 121 with the heat dissipation insulating sheet 13 interposed therebetween.

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

The function and effect 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, in the case where each light source module is fixed by the reflector, it is difficult to arrange the light source modules close to each other because it is necessary to provide an interval so that the respective reflectors do not contact each other. However, by using one reflector, it is not necessary to consider that the reflectors are in contact with each other, so that the light source modules can be arranged close to each other.
In the case of a plurality of reflectors, the design was inferior because a gap was formed between adjacent reflectors. However, by using a single reflector, an integrated design can be obtained. Is improved.

  In addition, by using one reflector 15, a plurality of light source modules 14 can be fixed at a time, and 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 (the 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, heat conduction from the substrate 141 to the base plate 121 is improved.

  In addition, by forming the reflector 15 as a single member, the molding process is facilitated, the processing cost is reduced, and the amount of the resin member used is reduced, so that the cost of the resin member is also reduced.

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

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

FIG. 14 is a diagram of the heat dissipation insulating sheet 13.
The heat dissipation insulating sheet 13 is not an essential component, but improves heat dissipation and insulation. The shape of the heat dissipation insulating sheet 13 is a circle having substantially the same diameter as the reflector 15, and the heat dissipation insulating sheet 13 is provided between the reflector 15 and the heat sink 12.
The heat radiation insulating 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, the reflector 15 and the substrate 141 need not be a heat-dissipating insulating sheet, but may be a heat-dissipating 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 the radiation fins 122 of the heat sink 12.

The heat sink 12 includes a base plate 121 made of a sheet metal, and radiation fins 122 made of a sheet metal.
The heat sink 12 has a screw hole 44 and fixes the reflector 15 with the screw 34. Three screw holes 44 are provided for one 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 fixes the intake cover 17 with a screw 35.
The heat sink 12 has a fall prevention insertion hole 236 through which a fall prevention wire passes. The fall prevention wire will be described in a fourth embodiment.

The heat sink 12 has a plurality of radiation fins 122.
FIG. 17 shows a case where one heat radiation fin 122 has two heat radiation 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 oblique side 83.
The long sides 81 of the heat sink 125 are arranged radially from the center C (central portion) of the heat sink 12 in the radial direction.
At both ends at the lower portion of the heat sink 125, there are an inner cut portion 84 and an outer cut portion 85 cut into an L shape to avoid screws or 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 end of the short side 82 of the heat radiating plate 125 is the same as the position of the outer flange 176.
The inclination angle of the oblique side 83 of the heat sink 125 is the same as the inclination angle of the main body cover 16.

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

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

As shown in FIG. 17, the 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 center of the trapezoidal shape in a linear direction.
The protrusion 123 has an annular convex shape having a hole 124 at the center.
The fin fixing portion 129 inserts the projection 123 into the mounting hole 127 and bends the tip of the projection 123 outward to sandwich the back surface 712 and the front surface 711 of the hole edge 713 of the mounting hole 127.
That is, the fin fixing portion 129 fixes the radiation fin 122 to the base plate 121 by sandwiching the back surface 712 and the front surface 711 of the mounting hole 127 of the mounting portion 126.

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.
At the position corresponding to the mounting hole 127 of the base plate 121, a small-diameter hole having a diameter smaller than the diameter of the mounting hole 127 is formed by punching. 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 projection having an outer diameter equal to or slightly smaller than the diameter of the mounting hole 127. The projection becomes a projection 123 having a hole 124 at the center.

Three mounting holes 127 are formed in one sheet metal and bent in a U-shape to form the radiation fins 122. The bent sides serve as heat radiating plates 125, and portions connecting the heat radiating plates 125 serve as mounting portions 126.
The mounting portion 126 has a mounting hole 127 into which the protrusion of the projection 123 of the base plate 121 fits. By fitting the mounting hole 127 into the projection of the projection 123 of the base plate 121, the mounting portion 126 is positioned on the base plate 121.

Next, the tip of the projection of the projection 123 is crushed by a tool (punch) having a diameter larger than the diameter of the mounting hole 127, so that the tip of the projection 123 is deformed outward, so that the mounting hole 127 and the projection 123 become 360 degrees. The mounting portion 126 is clamped evenly in the direction.
Even when solder or an adhesive is not used for manufacturing the heat sink 12, the base plate 121 and the mounting portion 126 are in close contact with each other.

  As described above, by forming the hole 124 in the projection 123 by enlarging the small-diameter hole, when a tool (punch) is pushed into the projection 123, the tip of the projection 123 is easily deformed evenly in the 360-degree direction. , The projection 123 and the mounting hole 127 are easily fastened.

Furthermore, the fixing force for fixing the heat radiation fins 122 to the base plate 121 is increased by bending the distal end portion of the protrusion 123 outward (the side opposite to the center direction of the hole 124) while the mounting hole 127 is pressed into the protrusion 123. .
Even when the amount of deformation of the projection 123 when the mounting hole 127 is inserted into the projection 123 is small, or when the projection 123 is not deformed to the outer shape, the hole 124 of the projection 123 is moved in the center direction by a tool (punch). The mounting hole 127 can be fixed to the projection 123 by being pushed to the opposite side.

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

  In the present embodiment, a case has been described in which one sheet metal is bent into a U shape to form two heat sinks 125 as the heat radiation fins 122, but one sheet metal is bent into an L shape. It may be formed. In this case, one side becomes the heat sink 125 and the other side becomes the mounting part 126.

FIG. 18 is a diagram of the main body cover 16.
The main body cover portion 16 has a substantially conical shape, and has a truncated conical shape with an open end cut off. The main body cover 16 may have a cylindrical shape, and may have a cylindrical shape, a conical shape, a prism shape, a pyramid shape, a truncated pyramid shape, or a hollow cylindrical shape having another shape.
The main body cover 16 has a main body cylinder 162 and a main body skirt 164. The main body cylindrical portion 162 has a side surface of an inclined truncated cone. The shape of the main body skirt portion 164 is an annular band.

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

  The main body ring 163 has four hooks 165. The hook portion 165 is formed by cutting a part of the main body ring portion 163 in a tongue shape and bending it downward in a key shape. The tip of the hook 165 is arranged parallel to the main body ring 163. The hook 165 is located at a position corresponding to the notch 178 of the intake cover 17. The main body ring portion 163 and the outer flange portion 176 are brought into contact with each other by bringing the main body ring portion 163 and the outer flange portion 176 into surface contact with each other so that the main body ring portion 163 and the outer flange portion 176 are rotated with each other. The screw hole 46 and the screw hole 43 coincide with each other, and the screw 33 is used to fix the intake cover 17 and the main body cover 16.

FIG. 19 is a diagram of the exhaust cover unit 20.
The exhaust cover portion 20 has a substantially truncated cone shape, and has a plurality of exhaust ports 204 opened on a side surface. 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 a surface obtained by extending the frustoconical side surface of the main body cover 16.

The exhaust cover section 20 is attached to the main body top section 161 at the top of the main body cover section 16 with screws 32 or rivets.
The exhaust cover section 20 has an exhaust top section 201, an exhaust cylinder section 202, and an exhaust flange section 203.
The exhaust top part 201 has one central opening for drawing out the electric wire, two screw holes 206 for fixing the dust avoiding cover part 21, and four screw holes 207 for screwing the suspension body 60. Further, there is an arc-shaped wire hole 208 for passing the fall prevention wire. The fall prevention wire will be described in a fourth embodiment.
The exhaust tube portion 202 has a plurality of exhaust ports 204. The inclination angle of the exhaust tube portion 202 is substantially the same as the inclination angle of the main body cover portion 16, and the exhaust tube portion 202 and the main body cylinder portion 162 have curved surfaces that are substantially parallel.
The exhaust flange 203 has four screw holes 205 through which the screws 32 pass, and the exhaust cover 20 is fixed to the main body cover 16 by the screws 32.
The upward airflow inside the main body cover 16 is exhausted from the exhaust port 204 to generate convection inside the main body cover 16.

Hereinafter, functions and effects of the intake port 171 and the exhaust port 204 will be described.
Since the main body cover 16 has a truncated cone shape, the convection inside the main body cover 16 is gathered toward the center of the circle as going upward from below. The heat sink 12 (radiation fins 122) causes the inside of the main body cover 16 to be in a high temperature state, lowers the density of air, and generates buoyancy because the density is lower than that of the outside of the main body cover 16. Due to this buoyancy, a pressure drop occurs below the main body cover 16, air flows in from the air inlet 171, and the air heated by the heat sink 12 rises inside the main body cover 16 and is exhausted from the exhaust port 204. You.

As described above, the configuration of the heat sink 12 disposed inside the housing 50 and the intake cover 17 and the exhaust cover 20 attached above and below the main body cover 16 allows the use of the chimney effect. Heat can be efficiently radiated 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 can easily exhibit the function of a chimney. In addition, since the exhaust port 204 exists inside the surface of the body cover 16 extending from the truncated conical side surface, the air collected in the center direction of the circle can be easily discharged to the outside. In addition, by using the chimney effect, the air easily flows in from the air inlet 171 and the air can be efficiently convected between the radiation fins 122, so that the heat radiation effect by 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 because the air is heated and expands. Therefore, the number of the radiation fins 122 can be reduced, and the weight of the lighting fixture 100 can be reduced.

  In addition, the position of the intake port 171 of the intake cover 17 and the end space 714 of the plurality of radiation fins 122 are set to be substantially the same. By doing so, the air taken in from the air inlet 171 can flow smoothly between the radiation fins 122 without being blocked by other components, so that the flow velocity of the air can be suppressed from decreasing. Therefore, the air flowing from the intake port 171 can be convected so as to entirely contact the surface of the radiation fin 122.

FIG. 20 is a diagram of the dust avoiding cover 21.
The dust avoiding cover 21 is disposed on the top surface 168 of the housing 50 and covers the upper part of the exhaust port 204.
The diameter of the dust avoiding cover 21 is substantially the same as the diameter when the frustoconical side surface of the main body cover 16 is extended upward to the position of the dust avoiding cover 21. Therefore, the main body cover portion 16 alone has a truncated cone shape, but the three-dimensional shape formed by the outline of the main body cover portion 16 and the dust avoidance 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 formed by the outline of the main body cover 16 and the dust avoidance cover 21. it can.

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

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

  The dust avoiding cover portion 21 is attached to the upper portion of the exhaust cover portion 20 with screws, and prevents 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 is so sized that the exhaust port 204 of the exhaust cover portion 20 cannot be seen when viewed from above, so that dust can fall into the main body cover portion 16 due to dust falling from above. Can be prevented.

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

The suspension body 60 includes a ceiling attachment 61 attached to the ceiling, a housing attachment 63 attached to the housing, and a connection portion 62 connecting the ceiling attachment 61 and the housing attachment 63.
The housing attachment 63 is detachably attached to the housing 50. Therefore, the suspension body 60 is detachably attached to the housing 50.
The housing attachment 63 is screwed to the dust avoiding cover 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 613, and an insertion tube 615.
The flange 611 has four screw holes 612 for screwing to the ceiling.
The insertion tube 615 has two pin through holes 614 and one screw hole 616.

FIG. 24 is a diagram of the connection unit 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 for passing the pins 621 at both ends. Also. The connecting portion 62 has a screw hole 624 for screwing a screw 622 for fixing the pin 621 at both ends.

FIG. 25 is a diagram of the housing fixture 63.
The housing attachment 63 is hollow and has a housing fixing portion 631 and an insertion tube 633.
The housing fixing portion 631 has two Dharma-type screw holes 632 and two screw holes 636 that are screwed to the housing 50. The reason why the Dharma-type screw holes 632 are used is to loosen the screws without removing the screws, to enable removal and conversion of the suspension body 60, and to shorten the working time.
The insertion tube portion 633 has two pin through holes 634 and one screw hole 635.

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

  In addition, an opening 219 is formed in the central part of the dust avoiding cover portion 21, and the lead wires can be exposed from the opening 219. This lead wire is mechanically and electrically connected to a power supply wire from the ceiling by the construction of the installer, and is for supplying power to the light source module 14 provided in the lighting fixture.

In addition, 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 length) becomes easy.
The installer who attaches the lighting fixture 100 to the ceiling can remove the hanging body 60 and change it to another hanging body 60 according to the mode of attaching the lighting fixture to the ceiling. For example, the housing 50 can be attached to a suspended body 60 such as a chain or an elevator.

  As described above, since the installer can remove the hanging body 60 of the lighting fixture 100 and change it to another fixture, the hanging body 60 is selectively attached to one type of lighting fixture. be able to.

In the present embodiment, the case where the hanging body 60 is attached to the dust avoiding cover 21 in advance has been described. However, the hanging body 60 and the dust avoiding cover 21 are separated in advance, and the suspending body 60 is It may be attached later.
Further, a terminal block may be installed on the bowl 613 of the ceiling fixture 61.
Alternatively, only the connection between the housing 50 and the suspending body 60 may be made detachable, and the other connections may be made unremovable using rivets, soldering, adhesives, or the like.

FIG. 26 is a diagram illustrating another example of the exhaust port 204.
FIG. 26 shows a case where the plurality of exhaust ports 204 are formed horizontally on the main body top 161 of the main body cover 16.
By increasing the width of the main body top part 161 of the main body cover part 16 in the center direction, a plurality of exhaust ports 204 can be formed in the main body top part 161.
The housing attachment 63 is fixed to the main body top 161, and the dust avoidance cover 21 is fixed on the housing attachment 63. Since the dust avoiding cover portion 21 is disposed on the housing attachment 63, the dust avoiding cover portion 21 does not block the exhaust port 204, and is separated from the exhaust port 204 by the height of the housing attachment 63 to the exhaust port 204. 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, and the dust avoiding cover portion 21 is fixed on the annular ring portion 29, and 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 in FIG. 26 is characterized in that the exhaust port 204 is not provided on the horizontal surface on the upper surface of the main body cover 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 cylindrical 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 illustrating another example of the intake port 171.
As shown in FIG. 27, the outer cylindrical portion 175 of the intake cover portion 17 is formed into a truncated conical shape whose diameter decreases downward, and the intake port 171 in a state of being inclined (not horizontal or vertical) on the side surface of the truncated cone. May be formed.

As described above, the intake port 171 does not have to be provided in a direction perpendicular to the lower surface of the housing 50, and the intake port 171 at the lower portion of the housing 50 is provided in a state inclined to the lower surface of the housing 50. May be.
In addition, for example, the intake port 171 may be formed in the main body cylinder 162 of the main body cover 16 instead of the intake cover 17.

FIG. 28 is a diagram illustrating another arrangement example of the radiation fins 122.
28 shows a case where the radiation direction of the heat radiation fin 122 is inclined at a predetermined angle with respect to the radial direction of the base plate 121, and the radiation fin 122 is spirally arranged.

For example, the plurality of radiating fins 122 in FIG. 28 are arranged such that, among the three fin fixing portions 129 in the radial direction, the center fin fixing portion 129 (the central portion of the radiating fin 122) is centered in the arrow direction (counterclockwise). ) And rotated. The angles θ3 and θ4 (θ3 ≠ θ4) between the radial direction R passing through the center of the upper side of the heat sink 125 (heat sink center K) and the upper side of the heat sink 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 from 20 degrees to 25 degrees, and more preferably 23 degrees.
FIG. 36 is a diagram illustrating a relationship between an angle (hereinafter, referred to as a fin angle) between the radial direction R passing through the center of the upper side of the heat sink 125 (heat sink center K) and the upper side of the heat sink 125 and the temperature of the LED 142. is there.
As shown in FIG. 36, the temperature decreases until the fin angle reaches 23 degrees, and then increases. When the fin angle is 27.5 degrees, the short sides on the center side of the adjacent heat radiation fins 122 come close to 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, and is preferably 1 degree or more and 27.5 degrees or less in terms of structure, and is 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 radiation effect. Better, 23 degrees is even better.

  As described above, when the angle exceeds 27.5 degrees, the space between the heat radiation fins 122 in the central portion of the heat sink 12 is narrowed structurally, so that the heat radiation improvement effect cannot be sufficiently obtained. In the case of 27.5 degrees or more, it is possible to cope with the problem by reducing the radial length of the heat radiation fins 122. In that case, however, the heat radiation area of the heat radiation fins 122 is reduced. The heat radiation capacity of the device decreases. When the fin area is increased in order to reduce the radial length of the radiating fins 122 and make the radiating capacity equal, it is conceivable to increase the height of the radiating fins 122. Since the height of the device is increased, the weight of the device as a whole increases.

  By arranging the radiation fins 122 so that the radiation direction of the radiation fins 122 is at a predetermined angle with respect to the radial direction R instead of being radially aligned with the radial direction R, the air flowing in from the intake port 171 can be obtained. The temperature rises due to the heat of the heat radiating plate 125 to generate a spiral rising airflow, and in combination with the shape of the inner wall of the main body cover portion 16, the heat radiation effect is improved by the chimney tunnel effect.

The rotation of the radiation fins 122 in the radial direction R is not performed about the fin fixing portion 129 but is rotated about the center of the long side 81 of the radiation fins 122 (the central portion of the heat radiation plate 125). Is also good.
According to this example, the heat radiation effect can be improved without increasing the weight of the heat radiation fins 122. In other words, even a lightweight heat sink made of sheet metal can sufficiently radiate the heat of the LED.

Embodiment 2 FIG.
FIG. 29 is a diagram of additional components according to the second embodiment.
FIG. 30 is a right side cutaway side view of the lighting fixture of the second embodiment.
FIG. 31 is a partially enlarged cross-sectional view of FIG. 30.
Hereinafter, points different from 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 optional components arranged in the direction of light emitted from the light source.

Optional parts are, for example,
(1) Guards for protecting the light-transmitting cover, reflector, and light source module,
(2) a diffusion cover for diffusing light emitted from the light source module (including light reflected by the reflector);
(3) an additional reflector for controlling light collection and light distribution;
It is.

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

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

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

  The insertion member 226 need not be a screw, but may be an elastic body fitted into the air inlet 171. The elastic body is provided so as to protrude toward the center C of the additional component 22 in an elastically deformable state, and has an end bent downward in a J shape (fish hook shape). The elastic body is screwed into the intake port 171 and elastically deforms. When the distal end of the elastic body is completely fitted into the intake port 171, the elastic body is released from the elastic deformation and the distal end does not fall out of the intake port 171. When the tip fits into the intake port 171, the elastic end bent downward in a J-shape is hooked on the lower end of the intake port 171 by the weight of the additional component 22, and the additional component 22 is attached to the intake cover 171. The state attached to the portion 17 can be maintained. When removing the additional component 22 from the intake cover 17, the elastic body can be elastically deformed, and the distal end can be removed from the intake port 171.

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

When the optional component is a diffusion cover or a reflection plate, the diffusion cover or the reflection plate may be attached to the protective flange 225.
That is, when the optional member is a diffusion cover, the protection guard line 223 is changed to a diffusion cover. The diffusion cover may be used together with the protection guard line 223. The diffusion cover is a milky cover such as polycarbonate (PC) and polymethyl methacrylate resin (PMMA), and is a resin cover containing a diffusion material.
Similarly, when the optional component is a reflector, the protection guard line 223 is changed to a reflector. On the reflector, a rotating radiation surface is created by an aluminum aperture (spinning) or the like. By making the surface a mirror surface or white finish, it is possible to condense or block light (suppress glare). .
In any of the optional parts, the protection ring 224 and the protection flange 225 have a common configuration and function.

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

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

FIG. 32 is a diagram illustrating another example of the additional component.
The additional component 22 in FIG. 32 is obtained by directly welding the attachment 221 to the tip of the cross metal rod of the protection guard wire 223.

Embodiment 3 FIG.
FIG. 33 is a diagram illustrating the lighting fixture 100 according to the third embodiment.
Hereinafter, points different from the first and second embodiments will be described.

The lighting fixture 100 has a hanging body 70 at an upper part of the housing 50.
The suspension 70 is also detachably attached to the housing 50, similarly to the suspension 60 described above. That is, it is possible for the installer to attach the suspension 70 to the housing 50 at the time of construction.

The suspension 70 has a connecting portion 72 and a ceiling-side mounting portion 73.
The connecting portion 72 is a cylindrical metal cylinder, but may be a rectangular parallelepiped metal box.
The power supply circuit 71 is built in the connection section 72.
The power supply circuit 71 has an AC / DC conversion function of inputting AC from an electric wire from a ceiling and outputting DC supplied to the light source module 14.

  The ceiling-side mounting portion 73 is a metal plate whose four parts are bent in a key shape. The central plate of the ceiling-side mounting portion 73 has an electric wire hole 75 through which electric wires pass. At both end plates of the ceiling-side mounting portion 73, there are 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 section 72 has the built-in power supply circuit 71, there is no need to install a power supply circuit behind the ceiling.
Further, since the connection section 72 has the 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 commercial power.

Embodiment 4 FIG.
FIG. 34 is a diagram illustrating the lighting fixture 100 according to 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, differences from Embodiments 1, 2, and 3 will be described.

The base plate 121 of the heat sink 12 has a drop prevention insertion hole 236 for passing the first drop prevention wire 231 at a central portion near the opening. For example, the inside diameter of the drop prevention insertion hole 236 is 3.5 mm. The fall prevention insertion hole 236 functions as a fall prevention wire attachment part.
The exhaust cover section 20 has a wire hole 208 through which the first fall prevention wire 231 passes.
The dust cover 21 has a notch 218 through which the first fall prevention wire 231 passes.
A substantially circular wire insertion hole 237 is formed by crossing the arc-shaped wire hole 208 of the exhaust cover portion 20 and the radial cutout 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 a lower end, and a detachable first fastener 233 is attached to an upper end.
The second fall prevention wire 232 is provided with a detachable second fastener 234 at the lower end, and forms a ring-shaped fixed ring 239 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 drop prevention wire, and the fastening portion 238 and the first fastener 233 are larger than the diameter of the drop prevention insertion hole 236 and the wire insertion hole. It has an outer diameter greater than the diameter of 237.
It is preferable that the fall prevention insertion hole 236 and the wire insertion hole 237 are formed so as to be 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 the 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 fastening is performed. The part 238 is to be hooked on the fall prevention insertion hole 236. The retaining portion 238 only needs to be larger than the hole diameter of the fall prevention insertion hole 236, and the shape is not limited to a ring shape.
In other words, the retaining portion 238 may have any shape as long as it can be hooked without passing through the drop prevention insertion hole 236.

  The upper end of the first fall prevention wire 231 is folded back, and the tip is fixed to the fall prevention wire itself with a crimp terminal or the like, so that a ring-shaped wire ring 235 is formed on 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 long hole is to facilitate the passage of the ring-shaped wire ring 235. The reason why the notch 218 of the dust avoiding cover 21 is cut out in the radial direction is to close the arc-shaped elongated hole of the wire hole 208 other than the portion that becomes the wire insertion hole 237. The notch 218 of the dust avoiding cover 21 does not have to be a notch, and may be a slot in the radial direction.

The wire ring 235 is in a state where it can pass through the fall prevention insertion hole 236 of the heat sink 12 and the wire insertion hole 237 on the upper part of the housing.
After inserting the wire ring 235 into the drop prevention insertion hole 236 and the wire insertion hole 237, the first fastener 233 is attached to the wire ring 235.
For both the first fastener 233 and the fastening part 238, one that cannot pass through the fall prevention insertion hole 236 and the wire insertion hole 237 is used.
The wire ring 235 may be prevented from coming out of the wire insertion hole 237 formed by the wire hole 208 of the exhaust cover 20 and the cutout 218 of the dust avoiding cover 21. By preventing the wire ring 235 from falling out of the wire insertion hole 237, the first fall prevention wire 231 does not fall out of the wire insertion hole 237 without the first fastener 233.

  A second fall prevention wire 232 different from the first fall prevention wire 231 attached to the base plate 121 is inserted into the suspension body 60. 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 a fixed ring 239 at the upper end of the second fall prevention wire 232 is fixed to the screw boss 619. Is 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 drop prevention wire 232 is fixed to the housing fixture 63 by hooking the fixing ring 239 on the screw boss 619. I do. After being hooked, it is closed with a metal fitting, and the metal fitting is screwed 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 retaining portion 238) is attached to the fixed ring 239, and a hole (corresponding to the drop prevention insertion hole 236) such as the fall prevention insertion hole 236 is formed in the housing fixture 63, and the ring of the fixed ring 239 is formed. And the second fall prevention wire 232 may be attached to the housing fixture 63.

  The second fall prevention wire 232 is passed from the screw boss 619 of the flange 611 of the ceiling fixture 61 to the connection part 62, to the housing fixing part 631 of the housing attachment 63, and penetrate the hanging body 60. A fixing portion for fixing the second fall prevention wire 232 may be provided in the housing fixing portion 631 so that the second fall prevention wire 232 does not return into the pipe of the connection 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 with a second fastener 234. As the first fastener 233 and the second fastener 234, an eggplant, 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 provided has been described, the first fastener 233 alone 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 the 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 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 the fall of the housing 50 can be prevented.

  The housing 50 has a wire insertion hole 237 having a diameter larger than the diameter of the first drop prevention wire 231, and the first fall prevention wire 231 cannot pass through the wire insertion hole 237. Therefore, the first fall prevention wire 231 can be prevented from falling into the housing 50.

  As described above, since the two fall prevention wires are connected by one or two fasteners, the hanging body 60 attached to the dust avoidance cover 21 and the housing 50 can be attached and detached, and the inside of the housing 50 can be removed. Wire insertion becomes easy.

  In addition, the housing 50 and the hanging body 60 can be attached and detached at the construction site at the time of construction. At this time, the fall prevention mechanism can be attached and detached at the construction site by two fall prevention wires.

  Further, since the first fall prevention wire 231 is attached inside the housing 50 and the second fall prevention wire 232 is attached inside the hanging 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 comes off from the fall prevention insertion hole 236, the retaining portion 238 is hooked on the wire insertion hole 237, so that the case 50 is prevented from dropping. be able to. Therefore, the wire insertion hole 237 also has a function as a fall prevention wire attachment portion, like the fall prevention insertion hole 236.

  Further, since the second fall prevention wire 232 is attached to the ceiling fixture 61, the fall of the connection part 62 and the housing fixture 63 can also be prevented. Even when the connecting portion 62 is a chain, the ceiling mount 61 at the top of the chain and the housing 50 are connected by wires, so that even if the chain is broken, the housing 50 can be prevented from falling.

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

  REFERENCE SIGNS LIST 100 lighting equipment, 12 heat sink, 13 heat dissipation insulating sheet, 14 light source module, 15 reflector, 16 body cover section, 17 intake cover section, 18 packing, 19 light transmissive cover section, 20 exhaust cover section, 21 dust avoidance cover section, 22 additional parts, 23 drop prevention mechanism, 24 power supply circuit, 29 annular ring part, 31 screw, 32 screw, 33 screw, 34 screw, 35 screw, 41 screw hole, 42 screw hole, 43 screw hole, 44 screw hole, 45 Screw hole, 50 housing, 60 hanging body, 61 ceiling mount, 62 connecting part, 63 housing mounting, 70 hanging body, 71 power supply circuit, 72 connecting part, 73 ceiling side mounting part, 75 wire hole, 76 mounting hole, 81 Long side, 82 Short side, 83 Bevel, 84 Inside cut, 85 Outside cut, 99 Tension stop, 121 base Plate, 122 radiating fin, 123 protrusion, 124 hole, 125 radiating plate, 126 mounting portion, 127 mounting hole, 129 fin fixing portion, 711 surface, 712 back surface, 713 hole edge, 714 end space, 131 screw hole, 141 board, 142 LED, 143 board edge, 144 connector, 145 wiring, 146 wire, 147 screw avoiding cut, 148 oblique cut, 149 positioning notch, 151 mounting, 152 opening, 153 board pressing, 154 reflection Part, 155 feeding tunnel, 156 front surface, 157 back surface, 159 positioning pin, 161 main body top, 162 main body cylinder, 163 main body ring, 164 main body skirt, 165 hook, 166 lower side, 167 upper side, 168 top Surface, 171 air inlet, 172 inner collar, 173 inner cylinder part, 174 middle ring part, 175 outer cylinder part, 176 outer flange part, 177 opening formation part, 178 cutout, 201 exhaust ceiling part, 202 exhaust cylinder part, 203 exhaust flange part, 204 exhaust port, 205 screw Holes, 206 screw holes, 207 screw holes, 208 wire holes, 211 dust avoiding ceiling, 212 dust avoiding inclined parts, 216 screw holes, 217 screw holes, 218 cutouts, 219 openings, 221 fittings, 222 optional parts, 223 Protective guard wire, 224 Protective ring, 225 Protective flange, 226 Insertion member, 227 Lower contact portion, 231 First fall prevention wire, 232 Second fall prevention wire, 233 First fastener, 234 Second fastener , 235 wire ring, 236 drop prevention insertion hole, 237 wire insertion hole, 238 fastening part, 239 fixing ring, 11 flange, 612 screw hole, 613 bowl part, 614 pin through hole, 615 insertion tube part, 616 screw hole, 619 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 board thickness The thickness of the RW reflector, the thickness of the AW substrate pressing part, and the center of the K heat sink.

Claims (7)

It has a mounting portion fixed to the base plate, and a heat sink continuous with the mounting portion,
The mounting portion is in close contact with the base plate in a state of surface contact throughout,
The heat radiating fin has a cut portion in which a space is formed between the heat radiating plate and the base plate. It has a mounting portion fixed to the base plate, and a heat sink continuous with the mounting portion,
The heat sink has a cut portion that forms a space between the heat sink and the base plate to avoid screws or screw holes,
The heat-dissipating fin, wherein the cut portion has cutout portions of different sizes cut into an L-shape at both ends on the lower side where the mounting portion is located. It has a mounting portion fixed to the base plate, and a heat sink continuous with the mounting portion,
The heat sink has a cut portion that forms a space between the heat sink and the base plate,
The mounting portion has a trapezoidal shape, has a mounting hole, and is formed on one side of one sheet metal bent along a bending line,
The heat sink is formed on the other side of the bent sheet metal,
The cut portion is a heat radiation fin that exists at at least one end of the bending line. A radiation fin according to any one of claims 1 to 3,
A heat sink, comprising: a base plate on which a plurality of the radiation fins are radially arranged.   The heat sink according to claim 4, wherein the cut portion has an outer cut portion formed outside the heat sink.   The heat sink according to claim 4, wherein the cut portion has an inner cut portion formed inside the heat sink. A light fixture having a truncated cone shape,
A heat sink according to any one of claims 4 to 6,
A light source fixed to the base plate,
A dish-shaped dust avoiding cover portion covering the upper part of the heat sink,
The lighting fixture, wherein the diameter of the dust avoiding cover portion is substantially the same as the diameter when the side of the truncated cone is extended upward to the position of the dust avoiding cover portion.

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