JP6455322B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture provided with a radiation fin.

  DESCRIPTION OF RELATED ART Conventionally, the lighting fixture provided with the light emission element which radiates the heat | fever of this light emitting element while providing light emitting elements, such as LED, in a light source is known (for example, refer patent document 1). The heat dissipating fins of the lighting fixture are integrally formed on the main body by aluminum die casting.

Japanese Patent Laid-Open No. 2015-022815

However, in the conventional configuration described above, since the heat radiating fins are molded by aluminum die casting, the weight of the heat radiating fins is increased, and consequently the weight of the main body is increased. In particular, in a high ceiling lighting fixture, it is desired to reduce the weight of the fixture.
This invention is made | formed in view of the situation mentioned above, and aims at providing the lighting fixture reduced in weight.

In order to achieve the above-described object, the present invention provides a lighting apparatus including a cylindrical main body made of die casting, wherein a light source is attached to one end of the main body, and the light source is attached to the main body. On the other hand , a plurality of thin plate-like heat radiation fins, which are separate from the main body portion, are attached to the other end side of the main body portion, and around the plurality of thin plate-like heat radiation fins, integrally with the main body portion. A plurality of molded die-cast fin portions are provided .

In the above-described configuration, a guard may be provided around the plurality of radiating fins.
In the above-described configuration, the guard may be formed in a plate shape and also serve as the fin portion.
In the above-described configuration, a plurality of the guards may be provided, and the radiating fins and the guards may be aligned.
Further, the present invention provides a lighting apparatus including a cylindrical main body portion made of die casting, wherein a light source is attached to one end side of the main body portion, and the main body portion is connected to the light source in addition to the main body portion. A plurality of fin portions are integrally molded by die casting on the end side, and a plurality of thin plate-like heat radiation fins are attached, guards are provided around the plurality of heat radiation fins, and the guard is formed in a plate shape, It also serves as a fin part.

  According to the present invention, since the thin plate-like heat radiation fin is provided separately from the die-cast main body, the lighting fixture can be reduced in weight.

It is a perspective view showing the whole high ceiling lighting fixture composition concerning an embodiment of the present invention. It is a figure which shows the structure of a high ceiling lighting fixture, (A) is a top view, (B) is a side view, (C) is a bottom view. It is a figure which shows the structure of the lighting fixture main body of a state except a top plate, (A) is a top view, (B) is a side view, (C) is a bottom view. It is a figure which shows the structure of a ring, (A) is a top view, (B) is AA sectional drawing of (A), (C) is an enlarged view of the site | part shown by the arrow B of (B). It is an assembly drawing of a high ceiling lighting fixture. It is a perspective view which shows the structure of an illumination unit. It is a top view of a lighting unit. It is CC sectional drawing of FIG. It is a disassembled perspective view of an illumination unit. It is an assembly drawing of a lighting unit. It is a perspective view which shows the structure of a housing | casing. It is a perspective view which shows the whole structure of the high ceiling lighting fixture which concerns on the modification of this invention. It is a perspective view which shows the whole structure of the high ceiling lighting fixture which concerns on the other modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In this embodiment, a high ceiling lighting fixture will be described as an example of a lighting fixture according to the present invention. Ceiling light fixtures are devices that are installed suspended from the ceiling surface of a building to illuminate the interior of a room, and high ceiling light fixtures are used in factories or other places where the ceiling height in the room is larger than general living rooms such as dwelling units and offices. Equipment installed on the ceiling of warehouses, gymnasiums, etc.

FIG. 1 is a perspective view showing an overall configuration of a high ceiling lighting fixture 1 according to the present embodiment. 2A and 2B are diagrams showing the configuration of the high ceiling lighting apparatus 1, FIG. 2A is a plan view, FIG. 2B is a side view, and FIG. 2C is a bottom view.
As shown in FIG. 1, the high ceiling lighting device 1 includes a lighting device body 2, an electric circuit box 3, and a fixture 4.
The luminaire main body 2 includes a plurality (two in the illustrated example) of lighting units (lamps) 10, a top plate 12, and a ring-shaped outer frame (outer frame) 14. The lighting unit 10 includes a top plate. 12, and the lower end side is surrounded by a ring-shaped outer frame 14.

The illumination unit 10 is a unit that includes a light source and includes a light emitting unit 11 that emits light from the light source.
The top plate 12 is a disk-shaped plate material, has sufficient rigidity to support the weight of the plurality of lighting units 10, and the plurality of lighting units 10 are suspended from the lower surface 12 </ b> A of the top plate 12. A light emitting unit 11 is located at the lower end of the lighting unit 10, and the room is illuminated by light emitted from the light emitting unit 11.
The ring-shaped outer frame 14 is an annular member that surrounds the lower ends of the plurality of lighting units 10 together.

The electric circuit box 3 is a substantially rectangular parallelepiped box containing an electric circuit required for blinking of the light source included in the illumination unit 10. In this luminaire body 2, a light emitting element is used as a light source of the lighting unit 10, and an electric circuit box 3 includes a power supply circuit that supplies DC power to the light emitting element, and a control circuit that controls blinking and dimming. Is contained. In addition to these electric circuits, various electric circuits can be housed in the electric circuit box 3.
In the high ceiling lighting device 1, the electric circuit box 3 is placed and fixed on the upper surface 12 </ b> B (FIG. 2A) of the top plate 12 of the lighting device body 2.

  The fixture 4 is a component that fixes the luminaire main body 2 to the ceiling surface of the building, and is fixed to the top plate 12 of the luminaire main body 2. As shown in FIGS. 1 and 2, a U-shaped arm-shaped metal fitting is used for the fixture 4. Instead of this arm-type metal fitting, a rod-like member or chain member that hangs down from the ceiling surface and is connected to the luminaire main body 2 at the lower end may be used as the fixture 4.

FIG. 3 is a diagram showing the configuration of the lighting fixture body 2 with the top plate 12 removed, FIG. 3 (A) is a plan view, FIG. 3 (B) is a side view, and FIG. 3 (C) is a bottom view. is there.
The luminaire main body 2 includes the ring-shaped outer frame 14 and a connector 16 as members for connecting a plurality of lighting units 10 to each other.
Specifically, in all the illumination units 10, the flange portion 11 </ b> A constituting the exit opening end portion of the light emitting portion 11 is fastened to the ring-shaped outer frame 14 with screws 15 as shown in FIG. Has been.

Further, as shown in FIGS. 3A to 3C, all the lighting units 10 are connected to each other by a connecting tool 16 disposed in the center of the arrangement of the lighting units 10 in plan view. The connecting tool 16 is a plate-like member that connects the lighting units 10 to each other by screwing the flange portion 11A of the lighting unit 10 disposed around the connecting tool 16.
This prevents the lighting unit 10 from being individually glazed, so that even when installed in a place with a lot of vibration, such as a factory or a gymnasium, the lighting unit 10 will individually glaze and collide with each other. Is suppressed. Further, by connecting the illumination units 10 to each other by the ring-shaped outer frame 14, it is possible to prevent the force from being concentrated on the connector 16, and as a result, the connector 16 can be reduced in weight and size. Furthermore, since the rigidity of the high ceiling lighting device 1 can be improved by the ring-shaped outer frame 14, the thickness of each lighting unit 10 can be reduced and the high ceiling lighting device 1 can be reduced in weight.

  When a ring-shaped outer frame is not provided, if force in the rotational direction is applied to the whole of the plurality of lighting units around the central portion of the lighting unit array, the force concentrates on the central portion of the lighting unit array. It is necessary to firmly form the connector located at the center. In the present embodiment, by providing the ring-shaped outer frame 14, even if the force in the rotational direction is applied, the force can be received by the ring-shaped outer frame 14, so when the ring-shaped outer frame 14 is not provided. In comparison, the connector 16 can be reduced in weight and size.

The plurality of lighting units 10 are arranged with a predetermined gap δ between the lighting units 10 and are fixed by a connector 16. The gap δ is set to such an extent that a gap is formed between the lighting units 10 even if there is a crossing between the dimensions of the parts and the assembly. Thereby, even if the high ceiling lighting fixture 1 is installed in a place with much vibration, for example, it can suppress that the lighting units 10 contact each other.
A space S is formed between each illumination unit 10 and the ring-shaped outer frame 14 except for the fixing portion between the flange portion 11A and the ring-shaped outer frame 14. A plate material may be provided in the space S. However, in the high ceiling lighting device 1, by not providing the plate material in the space S, it is possible to reduce the weight by the amount of the plate material as compared with the case where the plate material is provided, and dust or the like on the plate material. It can be prevented from accumulating.

Moreover, since the high ceiling lighting fixture 1 is installed in a ceiling surface with high ceiling height, a general consumer will visually recognize the bottom face of the high ceiling lighting fixture 1 exclusively. In the bottom view of the high ceiling lighting fixture 1, as shown in FIG. 2C, the ring-shaped outer frame 14 borders the plurality of lighting units 10, so that these lighting units 10 have a sense of unity. It is possible to give aesthetics to general consumers. Furthermore, since the ring-shaped outer frame 14 is formed larger than the maximum outer diameter when the plurality of lighting units 10 are arranged, the sense of unity of the plurality of lighting units 10 can be further increased.
Furthermore, as shown in FIG. 2B and FIG. 3B, the height H of the ring-shaped outer frame 14 is sufficient so that the side surfaces of the respective lighting units 10 are exposed to the outside in the side view of the lighting fixture body 2. Therefore, the heat of the lighting unit 10 can be sufficiently radiated to the outside through the exposed portion.

4A and 4B are diagrams showing the configuration of the ring-shaped outer frame 14, FIG. 4A is a plan view, FIG. 4B is a cross-sectional view taken along the line AA in FIG. 4A, and FIG. It is an enlarged view of the site | part shown by the arrow B of 4 (B).
As shown in FIG. 4A, the ring-shaped outer frame 14 has an annular shape in plan view, and as shown in FIGS. 4B and 4C, an annular plate-shaped top frame 14 is formed. The cross section having the surface portion 17 and the side surface portion 18 formed by vertically bending the outer peripheral edge of the top surface portion 17 is L-shaped. The rigidity is improved because the cross section is L-shaped.
A plurality of screw holes 19 are provided in the top surface portion 17 of the ring-shaped outer frame 14, and each of the illumination units 10 is coupled to the ring-shaped outer frame 14 by screws 15 passed through the screw holes 19.

FIG. 5 is an assembly diagram of the high ceiling lighting fixture 1.
As shown in this figure, the plurality of lighting units 10 are coupled to each other by the ring-shaped outer frame 14 and the connector 16, and the lighting units 10 are individually supported on the top plate 12 by the support bolts 7. .
As described above, the high ceiling lighting fixture 1 has a configuration in which the lighting units 10 are individually fixed to the top plate 12 in addition to the configuration in which the lighting units 10 are coupled to each other. As a result, even if a part of the lighting unit 10 has a decrease in the supporting force with the top plate 12, the reduction in the supporting force is compensated by the supporting force of the other lighting units 10. The lighting unit 10 is prevented from falling off.

FIG. 6 is a perspective view showing the configuration of the illumination unit 10, and FIG. 7 is a plan view of the illumination unit 10. 8 is a cross-sectional view taken along the line CC of FIG. FIG. 9 is an exploded perspective view of the lighting unit 10. FIG. 10 is an assembly diagram of the lighting unit 10. FIG. 11 is a perspective view showing the configuration of the housing 20.
As shown in FIG. 6, the illumination unit 10 includes a housing 20 that is a unit main body and a globe 21.
The housing 20 is formed by aluminum die casting, and includes a bottomed cylindrical main body 22. As shown in FIGS. 8 and 9, the main body 22 includes a light source 25 of the illumination unit 10. And a reflective cover 26 as a light control body. The opening end of the main body portion 22 is formed in a flange shape, and the flange portion 11A of the light emitting portion 11 is configured. As shown in FIG. 9, a transparent resin globe 21 is screwed to the flange portion 11 </ b> A with a packing 27 interposed therebetween.

As shown in FIG. 9, the light source 25 includes a substantially rectangular light source substrate 29, and a light emitting unit 30 is provided on the light source substrate 29. The light emitting unit 30 is formed by assembling a plurality of LEDs and mounting them on the light source substrate 29, and is a planar light source such as a COB (Chip on board) type LED light source. That is, in the COB type LED, a light emitting surface is configured by a large number of LEDs (light emitting elements) arranged closely, and also in this light emitting unit 30, a light emitting surface 30A is configured by a set of a plurality of LEDs. The light emitting surface 30A is disposed at substantially the center of the light source substrate 29 and has a circular shape in plan view having a predetermined area, and the optical axis K is perpendicular to the light emitting surface 30A.
As shown in FIG. 8, the number of light sources 25 corresponding to the design value of the light output of the illumination unit 10 is arranged on the mounting base 24 provided in a convex shape on the bottom surface 23 of the housing 20.
Since the plurality of light sources 25 are respectively provided on the convex mounting base 24, heat transfer in the in-plane direction of the bottom surface 23 is weaker than when these light sources 25 are provided in the same surface of the bottom surface 23. It is done. Thereby, the interference of heat between the light sources 25 is suppressed, and the heat of the light sources 25 is efficiently transmitted to the fin portions 47 that are thermally coupled to the bottom surface 23.
As shown in FIG. 9, the reflection cover 26 integrally includes a reflection mirror 32 provided for each light source 25, and controls the emitted light of the light source 25.

The housing 20 includes a heat radiating fin unit 40 and a support leg unit 41 on the upper surface 22A (FIG. 7) of the main body 22. Unlike the main body portion 22 made of aluminum die casting, the radiating fin unit 40 is formed of a thin plate material having high thermal conductivity. Specifically, as shown in FIG. 9, the radiating fin unit 40 is integrally provided with a large number of metal plate-like radiating fins 42, and is fixed to the upper surface 22 </ b> A of the main body 22 with screws.
By providing the heat radiating fin unit 40 separately from the main body 22, the casing 20 can be significantly reduced in weight compared to the case where the heat radiating fin unit 40 is integrally formed with the main body 22 by aluminum die casting.

As shown in FIG. 9, the support leg unit 41 includes two columnar support legs 44 fixed to the top plate 12 with the support bolts 7, and a plate-like fin portion 45 between the two support legs 44. It has. By providing the support legs 44, the main body portion 22 can be directly fixed to the attachment surface (in the present embodiment, the top plate 12), so that the degree of freedom of installation of the high ceiling lighting device 1 can be improved.
The support leg unit 41 is made of aluminum die casting, like the main body part 22 of the housing 20, and high heat dissipation is obtained with the fin part 45, and the support leg 44 is connected with the fin part 45, thereby providing high rigidity. It is secured.
As shown in FIG. 10, the support leg unit 41 is disposed such that the fin portion 45 is positioned between the heat radiation fins 42, and is fixed to the upper surface 22 </ b> A of the main body portion 22 with screws. As described above, the support leg 44 for fixing the main body portion 22 is erected on the main body portion 22, so that, for example, the fixing structure of the main body portion 22 is fixed as compared with the case where the main body portion 22 is fixed by a support metal fitting obtained by bending a sheet metal. Can be simplified and downsized.

As shown in FIG. 8, each support leg 44 is hollow with a hollow portion 44 </ b> A inside. In addition, the fin portion 45 is formed with a communication portion 45A, and the hollow portion 44A is communicated with the communication portion 45A. Thus, the support leg unit 41 can be reduced in weight by making the support leg 44 and the fin portion 45 hollow.
As shown in FIGS. 8 and 10, an outlet 33 is opened on the upper surface 22 </ b> A of the main body 22, and an electric wire (not shown) extending from the light source 25 through the outlet 33 is drawn from the main body 22. At this time, in order to seal the outlet 33, a bushing 34 is fitted into the outlet 33, and an electric wire is passed through the bushing 34. The lighting unit 10 is configured in a waterproof structure by a packing 27 and a bushing 34.

  A through hole (vent hole) 35 is formed on the upper surface 22A of the main body 22, and a filter 36 is provided in the through hole 35. The filter 36 is a filter having a dustproof and waterproof function. The filter 36 has air permeability and prevents water from entering inside and contamination of dust. By forming the through hole 35 in the main body 22 and providing the filter 36 in the through hole 35, the air in the main body 22 flows through the through hole 35 even if the lighting unit 10 has a waterproof structure. That is, when the light source 25 is turned on, the air in the main body 22 is heated and expanded by the heat generated by the light source 25, so that the air in the main body 22 is discharged to the outside through the through hole 35. On the other hand, when the light source 25 is turned off, the air heated and expanded by the heat generated by the light source 25 is cooled and contracted by the external atmospheric temperature or the like, so that the external air enters the main body 22 from the through hole 35. Become.

  The outlet 33 and the through hole 35 are disposed directly below the support leg unit 41, and specifically, the outlet 33 and the through hole 35 are respectively located in the hollow portion 44 </ b> A of the support leg 44. As a result, the outlet 33 and the through hole 35 are covered by the support legs 44, and foreign matter such as dust and water is prevented from directly falling on the outlet 33 and the through hole 35. Further, the electric wire from the outlet 33 is drawn into the hollow portion 44 </ b> A of the support leg 44 and is protected by the support leg 44.

As shown in FIG. 9, the support leg 44 on the side (one side) where the outlet 33 is disposed is formed with an opening 37 for opening the hollow portion 44 </ b> A to the outside, and the electric wire passing through the outlet 33 is opened. It is pulled out from the part 37. Further, as described above, since the hollow portions 44A of the two support legs 44 are communicated by the communication portion 45A, the air in the main body portion 22 that has exited the through hole 35 is discharged to the outside from the opening portion 37, External air is introduced from the opening 37. As described above, the hollow portion 44A of the two support legs 44 is communicated by the communication portion 45A, so that the other support leg 44 can be ventilated to the one support leg 44, and thus the through hole 35 is disposed. There is no need to separately provide a ventilation opening in the side (other) support leg 44.
As shown in FIG. 5, a through hole 38 is formed in the top plate 12, and the electric wire drawn out from the opening 37 is routed through the through hole 38 and wired to the electric circuit box 3. In the present embodiment, the through holes 38 are formed in each of the illumination units 10, but the through holes 38 common to the plurality of illumination units 10 may be formed.

In addition, a large number of fin portions (guards) 47 are erected on the upper surface 22 </ b> A of the main body portion 22 so as to surround the radiating fin unit 40. These fin portions 47 are integrally molded as a part of the main body portion 22 by aluminum die casting, and high rigidity and heat dissipation are ensured.
By providing the fin portion 47 around the radiating fin unit 40, the radiating fin unit 40 is guarded by the fin portion 47. Further, by providing the fin portion 47 around the radiating fin unit 40, the radiating fin unit 40 is not easily seen from the side (diagonally below) by the fin portion 47, so that the radiating fin unit 40 is separated from the main body portion 22. Even if it equips, the design nature of high ceiling lighting fixture 1 can be maintained. Furthermore, as described above, since the ring-shaped outer frame 14 is disposed around the lighting unit 10, the lighting unit 10 (particularly, the radiation fin unit 40) can be protected by the ring-shaped outer frame 14.

As shown in FIGS. 6 and 7, the heat radiating fins 42 and the fin portions 47 are arranged so as to be aligned with each other, and air permeability between the heat radiating fins 42 is ensured. Further, by arranging the radiating fins 42 and the fin portions 47 to each other, the radiating fins 42 are hardly seen by the fin portions 47, and the design of the high ceiling lighting device 1 can be maintained.
The fin portions 47 positioned on both sides in the arrangement direction of the radiation fins 42 are formed to be relatively larger than the fin portions 47 arranged in alignment with the radiation fins 42 in order to cover the surface portions of the radiation fins 42. In this embodiment, the fin part 47 is reduced in weight by forming the notch part 47A in the approximate center of the fin part 47 located on both sides in the arrangement direction of the radiation fins 42.

Moreover, the fin part 47 is formed lower than the radiation fin 42, and the fin part 47 is reduced in weight by this. Since the high ceiling lighting device 1 is attached to a relatively high place, even if the fin portion 47 is lower than the radiating fin 42, the radiating fin 42 is difficult to see due to the fin portion 47.
The support legs 44 are set to a height that allows a predetermined distance L (FIG. 2) between the radiating fins 42 and the top plate 12, thereby ensuring the air permeability of the radiating fins 42.

  In the present embodiment, the plurality of lighting units 10 are fixed by the top plate 12, the ring-shaped outer frame 14, and the connector 16, and the rigidity of the high ceiling lighting device 1 is increased. For example, the lighting unit 10 is fixed. It is also possible to reduce the number of support bolts 7. As a result, the number of parts can be reduced and the manufacturing process can be simplified.

  As described above, according to the present embodiment, a plurality of fin portions 47 are integrally formed by die casting on the main body portion 22 and a plurality of thin plate-like heat radiation fins 42 are attached. Thus, since the thin-plate-like heat radiating fins 42 are provided separately from the die-cast main body 22, the high ceiling lighting device 1 can be reduced in weight.

  According to the present embodiment, since the guard (fin portion 47) is provided around the plurality of heat radiation fins 42, the thin heat radiation fins 42 can be protected by the guard.

  Further, according to the present embodiment, the guard is formed in a plate shape and serves also as the fin portion 47, so that heat dissipation can be improved.

  In addition, according to the present embodiment, a plurality of fin portions 47 are provided, and the heat dissipating fins 42 and the fin portions 47 are arranged so that the air permeability between the heat dissipating fins 42 can be improved.

However, the above-described embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the above-described embodiment, the outer frame has been described as the ring-shaped outer frame 14, but the shape of the outer frame is not limited to this, and may be, for example, a square shape.
Moreover, in the above-mentioned embodiment, although the ring-shaped outer frame 14 was formed larger than the maximum outer diameter at the time of arrange | positioning the several illumination unit 10, you may form below the said maximum outer diameter.
Moreover, in the above-mentioned embodiment, although the ring-shaped outer frame 14 was integrally formed, you may be comprised including the some frame piece divided | segmented into the circumferential direction. In this case, the ring-shaped outer frame may be formed in an annular shape together with the frame piece connecting the illumination unit 10 and the flange portion 11 </ b> A (outer peripheral portion) of the illumination unit 10.

  Moreover, in the above-mentioned embodiment, although the one connection tool 16 was provided with respect to the some illumination unit 10, the number of the connection tools 16 is not limited to this.

  Further, in the above-described embodiment, the fin portion 47 is formed lower than the heat radiating fin 42, but the fin portion 47 may be made as high as the heat radiating fin 42, or the fin portion 47 is made higher than the heat radiating fin 42. It may be formed.

In the above-described embodiment, the number of support legs 44 is two, but the number of support legs 44 is not limited to this, and may be three or more, for example.
In the above-described embodiment, the support legs 44 are fixed to the top plate 12. However, the support legs 44 may be directly fixed to the ceiling surface (attachment surface).

In the above-described embodiment, the main body portion 22 of each lighting unit 10 is formed in a cylindrical shape. However, the shape of the main body portion 22 is not limited thereto, and for example, the main body portion 22 is formed in a rectangular tube shape. May be.

Moreover, in the above-mentioned embodiment, although the high ceiling lighting fixture 1 was provided with the two lighting units 10, it may be provided with three or more lighting units 10, and as shown to the high ceiling lighting fixture 100 of FIG. In addition, one lighting unit 10 may be provided. In this case, the connector 16 and the ring-shaped outer frame 14 are unnecessary.
Moreover, in the above-mentioned embodiment, although the electric circuit box 3 was provided in the lighting fixture main body 2, as shown in the high ceiling lighting fixture 200 of FIG. 13, without providing the electric circuit box 3 in the lighting fixture main body 2, An electric circuit box (not shown) may be separately placed at a location away from the luminaire main body 2, and the electric circuit box 3 and the luminaire main body 2 may be wired. In FIG. 13, reference numeral 204 denotes a pipe provided in place of the fixture 4, and the high ceiling lighting device 200 is fixed to the ceiling surface via the pipe 204.

In the above-described embodiment, the COB type LED is used as the light source 25. However, the light source 25 is not limited to the LED, and may be another light emitting element such as an organic EL.
Moreover, although the high ceiling lighting fixture was demonstrated as the lighting fixture in the above-mentioned embodiment, this invention is applicable not only to this but to various lighting fixtures.

1,100,200 High ceiling lighting equipment (lighting equipment)
22 Body part 42 Radiation fin 47 Fin part (guard)

Claims (5)

In a lighting fixture having a cylindrical main body made of die casting,
A light source is attached to one end of the main body,
The main body portion is attached to the other end side of the main body portion with respect to the light source, and a plurality of thin plate-like heat radiation fins that are separate from the main body portion ,
A lighting fixture comprising a plurality of die-cast fin portions molded integrally with the main body portion around the plurality of thin plate-shaped heat radiation fins .   The lighting fixture according to claim 1, wherein a guard is provided around the plurality of heat radiation fins.   The lighting fixture according to claim 2, wherein the guard is formed in a plate shape and also serves as the fin portion. A plurality of the guards are provided,
The lighting fixture according to claim 3, wherein the heat dissipating fins and the guard are aligned.   In a lighting fixture having a cylindrical main body made of die casting,
  A light source is attached to one end of the main body,
  A plurality of fin portions are integrally formed by die casting on the other end side of the main body portion with respect to the light source, and a plurality of thin plate-like heat radiation fins are attached to the main body portion,
  A guard is provided around the plurality of radiating fins,
  The said guard is formed in plate shape and serves as the said fin part, The lighting fixture characterized by the above-mentioned.

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