JP2015220227A - Lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting apparatus which allows easy installation operation and is capable of efficiently dissipating heat generated in a light source.SOLUTION: A lighting apparatus 1 has: a light source section 3 that is provided with a substrate 15 having a plurality of LEDs 2 mounted thereon; a power supply housing section 5 that does not protrude from the outer periphery of the light source section 3 when viewed from a substrate mounting surface 15a side of the substrate 15, is disposed in the axis direction of the center axis 15b of the substrate 15, and houses drive power supply circuits 13a, 13b that supply electric power to the light source section 3; and a connecting section 7 that connects the power supply housing section 5 to the light source section 3 by providing a space 17 between the power supply housing section 5 and the light source section 3.

Description

  The present invention relates to a lighting fixture that is mounted at a high place and projects a lower floor surface or the like.

  Conventionally, there is known a lighting device for high ceiling that is attached to a high ceiling such as a multipurpose hall or a gymnasium and projects a floor surface below (for example, Patent Documents 1 to 3).

Japanese Patent No. 5366312 JP 2013-65411 A JP 2013-77470 A

  However, conventional high ceiling lighting fixtures have problems that the installation work is complicated and the heat dissipation efficiency of the heat generated by the light source is not sufficient.

  An object of the present invention is to provide a lighting apparatus that can be easily attached and can efficiently dissipate heat generated by a light source.

  In order to solve the above-described problem, a lighting fixture according to an aspect of the present invention includes a light source unit including a plurality of light emitting elements mounted on a substrate mounting surface of a substrate, and the light source unit viewed from the substrate mounting surface side. A power storage portion that does not protrude from the outer periphery and is disposed along the axial direction of the central axis of the substrate, and stores at least one driving power supply circuit that drives the light emitting element; And a connecting part that connects the power storage part to the light source part by providing a space between the light source part, and the light source part is provided on the back side of the substrate mounting surface and generates heat generated on the substrate. The connecting portion has an arch shape with both ends formed in a bifurcated shape, and the heat radiating portion has a plurality of protrusions provided in a direction opposite to the light emitting side. Fins are formed, and other regions of the plurality of fins Fin having a widely formed region, characterized in that mounted in the formed in the wide to the opposite ends of the coupling region.

  The power storage unit may be attached to the center of the coupling unit.

  The light source unit may include a translucent protection unit that is attached to the heat radiating unit on the substrate mounting surface side and transmits light emitted from the light emitting element and protects the light emitting element. The light protection part may have an internal pressure adjustment part that adjusts the pressure of the space surrounded by the substrate, the light transmission protection part, and the heat dissipation part.

  The light source unit may include a cooling fan disposed on the heat radiating unit and a fan housing unit that houses the cooling fan.

  The fan housing portion may include an air inlet that sucks outside air into the fan housing portion and a prevention portion that prevents a finger from entering the air from the air inlet.

  A part of the power storage unit may be formed to be openable and closable.

  The substrate is disposed in the center of the substrate mounting surface and supplies at least one connector for supplying the current output from the driving power supply circuit to the light emitting element, and the substrate is disposed on the substrate mounting surface so as to surround the connector. You may have a some light emitting element and a some resistive element which adjusts the electric current amount which is arrange | positioned on the said board | substrate mounting surface surrounding the said connector, and flows through the said light emitting element.

  The center of the power storage unit and the center of the substrate may be arranged on a straight line.

  The power storage unit may be arranged so as not to overlap the light source unit when the substrate mounting surface is viewed in parallel.

  According to the present invention, the attaching operation is easy, and the heat generated by the light source can be efficiently radiated.

It is an external appearance perspective view of the lighting fixture 1 by one Embodiment of this invention. It is the figure seen from the board | substrate mounting surface 15a side of the board | substrate 15 with which the lighting fixture 1 by one Embodiment of this invention was equipped. It is a disassembled perspective view of the lighting fixture 1 by one Embodiment of this invention. It is an external appearance perspective view of the light source part 3 with which the lighting fixture 1 by one Embodiment of this invention was equipped. It is a disassembled perspective view of the light source part 3 with which the lighting fixture 1 by one Embodiment of this invention was equipped. It is a figure explaining the lighting fixture 1 by one Embodiment of this invention, Comprising: It is a figure which shows typically the fan accommodating part 34 seen from the attachment surface side to the thermal radiation part 31. FIG. It is a figure which shows the internal structure of the power supply accommodating part 5 with which the lighting fixture 1 by one Embodiment of this invention was equipped. It is the figure seen from the board | substrate mounting surface 15a side of the board | substrate 15 with which the lighting fixture by the modification of one Embodiment of this invention was equipped.

The lighting fixture by one Embodiment of this invention is demonstrated using FIGS. 1-8. FIG. 1 is an external perspective view of a lighting fixture 1 according to the present embodiment. FIG. 1A is a perspective view seen from the light source unit 3 side, and FIG. 1B is a perspective view seen from the power storage unit 5 side. FIG. 2 is a view of the substrate 15 accommodated in the light source unit 3 as viewed from the substrate mounting surface 15a side. FIG. 3 is an exploded perspective view of the lighting fixture 1.
As shown in FIGS. 1 and 3, the lighting fixture 1 includes a light source unit 3 including a substrate 15 (details will be described later) on which a plurality of LEDs (Light Emitting Diodes) 2 (details will be described later) are mounted, and a light source unit. A power supply storage unit 5 that stores drive power supply circuits 13 a and 13 b for supplying power to the power supply unit 3, and a space 17 is provided between the power supply storage unit 5 and the light source unit 3 to connect the power supply storage unit 5 to the light source unit 3. And a connecting portion 7. The luminaire 1 is mounted on a high ceiling such as a multipurpose hall or a gymnasium to project a floor surface or a wall surface. The luminaire 1 is provided with a power cable 11 for supplying power to the drive power supply circuits 13a and 13b. The power cable 11 is drawn upward from one side surface of the power storage unit 5. Thereby, when the lighting fixture 1 installs the lighting fixture 1 in a high ceiling, the power cable 11 can be easily routed. The lighting fixture 1 is formed on the surface where the power cable 11 of the power storage unit 5 is inserted, and has a mounting jig (not shown) for mounting the lighting fixture 1 to the high ceiling.

  As shown in FIG. 2, the substrate 15 provided in the light source unit 3 has a circular thin plate shape. The substrate 15 has a substrate mounting surface 15a on which a plurality of LEDs (examples of light emitting elements) 2, 21a, 21b, 21c, 21d, 21e, 21f, 21g, 21h, 23a, 23b, 23c, 23d, and 23e are mounted. doing. Hereinafter, the plurality of LEDs 21a, 21b, 21c, 21d, 21e, 21f, 21g, and 21h are abbreviated as “plural LEDs 21a to 21g”, and the plurality of LEDs 23a, 23b, 23c, 23d, and 23e are “multiple LEDs 23a to 23e”. May be abbreviated. A plurality of LEDs 2, 21a to 21h, 23a to 23e and a plurality of resistance elements 4 are mounted concentrically on the board mounting surface 15a. In FIG. 2, only 27 LEDs and one resistance element are provided with reference numerals, but white rectangles in FIG. 2 (white rectangles representing capacitive elements 10a, 10b, 10c, and 10d described later are (Excluding) represents an LED, and a rectangle with dotted hatching represents a resistance element. Hereinafter, the plurality of LEDs may be collectively referred to as “a plurality of LEDs 2” or “LED 2”. The substrate 15 includes a plurality of screw fastening portions 151a, 151b, 151c, 151c, 151d, 151e, 151f, 151g, 151h (hereinafter referred to as “screw fastening portions 151a to 151h”) formed by cutting out part of the outer peripheral edge of the substrate 15. May be abbreviated as ")". The substrate 15 is fixed to a base portion 31d (details will be described later) of the heat radiating portion 31 by screws (not shown) inserted into the screw fixing portions 151a to 151h from the substrate mounting surface 15a side.

  Six concentric circles are formed by the plurality of LEDs 2 and the plurality of resistance elements 4 on the substrate mounting surface 15a. A plurality of LEDs 2 are arranged on concentric circles in the first, third, fifth, and sixth rows from the outer peripheral side of the substrate 15, and a plurality of resistance elements 4 are arranged on the fourth concentric circles. ing. The plurality of LEDs 21a to 21h are formed with screw fixing portions 151a to 151h and cannot be arranged on the first row of concentric circles. Therefore, the plurality of LEDs 21a to 21h are arranged to be shifted from the first row of concentric circles. It is regarded as an LED arranged on a concentric circle of the eye. Further, the plurality of LEDs 23a to 23e cannot be arranged on the fifth row of concentric circles on the wiring layout (not shown), and are thus shifted from the fifth row of concentric circles, but on the electrical connection, the fifth row is arranged. Are considered to be LEDs arranged on a concentric circle. The resistance element 4 is provided for adjusting the amount of current supplied to the LED 2 and correcting element variation (light emission variation) between the plurality of LEDs 2. In the present embodiment, by providing a plurality of LEDs 2 on the substrate 15, a desired amount of light emission can be obtained as a whole while reducing the amount of light emission per LED 2. Thereby, since the amount of current supplied to one LED is reduced, the life of the plurality of LEDs 2 can be extended.

  The substrate 15 has a laminated structure. The substrate 15 is an aluminum base material formed of aluminum as a first layer, an insulating layer as a second layer, a copper pattern layer patterned with a copper wire serving as a current path for supplying power to the LED 2, the resistance element 4 and the like as a third layer. The fourth layer has a laminated structure called a resist layer that becomes the substrate mounting surface 15a. The aluminum base material is formed to a thickness of 2 mm, for example. The insulating layer is formed with a thickness of, for example, 95 μm or 120 μm. A white oil-based resist material is used for the resist layer. Thereby, the reflectance at the board mounting surface 15a is improved, and the utilization efficiency of light emitted from the plurality of LEDs 2 is improved.

  A circular opening 8 is formed in the center of the substrate 15. The midpoint of the opening 8 is the central axis 15 b of the substrate 15. In FIG. 2, for easy understanding, the center axis 15 b is illustrated by the “x” mark, but the “x” mark does not actually exist at the midpoint of the opening 8. At least one (four in this embodiment) connectors 6a, 6b, 6c, and 6d are mounted on the board mounting surface 15a. The connectors 6a and 6b are arranged at the center of the board mounting surface 15a with the opening 8 interposed therebetween. The connectors 6c and 6d are arranged at the center of the board mounting surface 15a with the opening 8 interposed therebetween. The connectors 6a, 6b, 6c, 6d are arranged at equal intervals. The connectors 6a, 6b, 6c, 6d are provided around the central axis 15b at intervals of about 90 °. The connectors 6a, 6b, 6c, and 6d are configured to supply currents output from the drive power supply circuits 13a and 13b to the plurality of LEDs 2. The opening 8 serves as a passage route for the power cable 9 (see FIG. 1) that is routed from the back side (aluminum base side) of the board mounting surface 15a and connected to the connectors 6a, 6b, 6c, and 6d. A current supplied to the plurality of LEDs 2 flows through the power cable 9. The connectors 6a, 6b, 6c, 6d improve the connection workability when connecting the power cable 9 to the connectors 6a, 6b, 6c, 6d, and the power cable 9 is routed more than necessary on the board mounting surface 15a. It arrange | positions in the vicinity of the opening part 8 so that it may not be carried out. By arranging the connectors 6a, 6b, 6c, 6d close to the opening 8, the power cable 9 is prevented from being routed on the board mounting surface 15a. Two capacitive elements 10a are mounted on the board mounting surface 15a on the rear side of the connector 6a. Two capacitive elements 10b are mounted on the board mounting surface 15a on the rear side of the connector 6b. Two capacitive elements 10c are mounted on the board mounting surface 15a on the rear side of the connector 6c. Two capacitive elements 10d are mounted on the board mounting surface 15a on the rear side of the connector 6d. Note that the rear side of the connectors 6a, 6b, 6c, and 6d refers to the side opposite to the side (front side) to which the power cable 9 is connected on the board mounting surface 15a. Capacitance elements 10a, 10b, 10c, and 10d function as bypass capacitors, and prevent currents and voltages supplied to a plurality of LEDs 2 from changing via connectors 6a, 6b, 6c, and 6d. It has become.

  The plurality of LEDs 2 are disposed on the board mounting surface 15a so as to surround the connectors 6a, 6b, 6dc, and 6d. The plurality of resistance elements 4 are disposed on the board mounting surface 15a so as to surround the connectors 6a, 6b, 6c, and 6d. The connector 6a is for supplying current to the plurality of LEDs 2, 21a, 21b, 23a, 23b mounted on the board mounting surface 15a in the upper left region α in FIG. 2 divided by the virtual straight line A and the virtual straight line B. It is a connector. The connector 6b is for supplying current to the plurality of LEDs 2, 21c, 21d, 21e, and 23c mounted on the board mounting surface 15a in the region β on the upper right side in FIG. 2 divided by the virtual straight line A and the virtual straight line B. It is a connector. The connector 6c is for supplying current to the plurality of LEDs 2, 21e, 21f, 21g, and 23d mounted on the board mounting surface 15a in the lower right region γ in FIG. 2 divided by the virtual straight line A and the virtual straight line B. Connector. The connector 6d is connected to the plurality of LEDs 2, 21h, 21a, 23e, 23a, 23e, 23a mounted on the board mounting surface 15a in the region ε on the lower left side in FIG. 2 divided by the virtual straight line A and the virtual straight line B. This is a connector for supplying current. One of the plurality of LEDs 2 arranged on the first to third concentric circles, and one resistor of the plurality of resistance elements 4 arranged on the fourth concentric circle The element and one LED of the plurality of LEDs 2 arranged on one of the concentric circles on the fifth and sixth rows of concentric circles are connected in series.

  Therefore, from the outer peripheral side of the substrate 15 toward the opening 8 side, “the first row of LEDs 2-2, the second row of LEDs 2-3, the second row of LEDs 2-4, the fourth row resistance elements 4-5, or the sixth row The LED and the resistance element are connected in series in the order of “LED2”. Four LEDs connected in series and one resistive element 4 are connected in parallel in each of the regions α, β, γ, and ε. More specifically, the anodes of the plurality of LEDs 2, 21a, 21b arranged on the first row in the concentric circle and in the region α are connected to each other and connected to the positive terminal of the connector 6a. The cathodes of the plurality of LEDs 2, 23a, 23b arranged on the fifth row and the sixth row on the concentric circles in the region α are connected to each other and connected to the negative terminal of the connector 6a. Similarly, the anodes of the plurality of LEDs 2, 21c, 21d, and 21e arranged on the first concentric circle and in the region β are connected to each other and connected to the positive terminal of the connector 6b. The cathodes of the plurality of LEDs 2 and 23c arranged in the region β on the fifth and sixth concentric circles are connected to each other and connected to the negative terminal of the connector 6b. Similarly, the anodes of the plurality of LEDs 2, 21e, 21f, and 21g arranged on the first concentric circle and in the region γ are connected to each other and connected to the positive terminal of the connector 6c. The cathodes of the plurality of LEDs 2 and 23d arranged on the fifth and sixth concentric circles and in the region γ are connected to each other and connected to the negative terminal of the connector 6c. Similarly, the anodes of the plurality of LEDs 2, 21h, 21a arranged on the first concentric circle and in the region ε are connected to each other and connected to the positive terminal of the connector 6d. The cathodes of the plurality of LEDs 2, 23e, 23a arranged on the fifth and sixth concentric circles and in the region ε are connected to each other and connected to the negative terminal of the connector 6d.

  As shown in FIG. 2, the plurality of LEDs 2 are discretely arranged on the substrate mounting surface 15a. The luminaire 1 is attached to a ceiling of a gymnasium or the like, and is separated from a place where the luminaire 1 projects light by a predetermined distance. For this reason, when the luminaire 1 is viewed from the place where the light is projected, it appears as if the luminaire 1 emits light on the entire surface of the board mounting surface 15a.

  Returning to FIG. 1, the light source unit 3 includes a heat dissipating unit 31 that is provided on the back side of the substrate mounting surface 15 a (not shown in FIG. 1) and dissipates heat generated in the substrate 15. The connecting portion 7 is attached to the heat radiating portion 31. As shown in FIG.1 (b), the thermal radiation part 31 has the light emission side formed circularly, and has a mortar shape as a whole. Although details will be described later, the heat radiating portion 31 is formed with a plurality of outer fins 31 a and inner fins 31 b that are alternately provided so as to protrude in the direction opposite to the light emission side.

  As shown to Fig.1 (a), the light source part 3 has the translucent protection part 32 which is attached to the thermal radiation part 31 by the board | substrate mounting surface 15a side, and permeate | transmits the light which LED2 emits, and protects LED2. ing. The substrate 15 (not shown in FIG. 1) is disposed in the light source unit 3 with the substrate mounting surface 15 a facing the inner surface of the translucent protection unit 32. A predetermined gap is provided between the substrate mounting surface 15 a and the translucent protection part 32. The translucent protection part 32 has an internal pressure adjustment part 32a (details will be described later) for adjusting the pressure in the space surrounded by the substrate 15, the translucent protection part 32, and the heat dissipation part 31.

  The light source unit 3 includes a fall prevention unit 33 that prevents the translucent protection unit 32 from falling. Three fall prevention parts 33 are provided at equal intervals on the outer peripheral part of the translucent protection part 32. Although details will be described later, the fall prevention unit 33 fixes the translucent protection part 32 to the heat dissipation part 31 by sandwiching the outer peripheral part of the translucent protection part 32 and the outer peripheral part of the heat dissipation part 31. Yes. The light source unit 3 includes a fan housing unit 34 that houses a cooling fan 36 disposed on the heat radiating unit 31. Details of the fan accommodating portion 34 and the cooling fan 36 will be described later.

  The power storage unit 5 does not protrude from the outer periphery of the light source unit 3 when viewed from the substrate mounting surface 15 a side of the substrate 15 and is disposed along the axial direction of the central axis 15 b of the substrate 15. The power storage 5 has a hollow rectangular parallelepiped shape. The power storage unit 5 includes a box-shaped box part 51 whose one surface is opened, and a lid part 52 which closes the opening of this one surface. The lid part 52 can be removed from the box part 51. Furthermore, as shown in FIG. 1B, the lid portion 52 has a locking portion 52 b that can be locked to the box portion 51. Thereby, the lid part 52 can be opened in a state of being locked to the box part 51. Thus, a part of the power storage 5 (in this example, the lid 52) is formed so as to be opened and closed. The lid 52 is formed with a plurality of heat radiation ports 52a for radiating heat generated in the drive power supply circuits 13a and 13b. Each of the plurality of heat radiation ports 52a has an elongated rectangular shape, and is formed substantially in parallel.

  The connecting unit 7 is configured to connect the power storage unit 5 to the light source unit 3 by providing a space 17 between the power storage unit 5 and the light source unit 3. Since the space 17 is provided by the connecting portion 7, the power storage portion 5 is disposed so as not to overlap the light source portion 3 when the substrate mounting surface 15 a is viewed in parallel, that is, in the in-plane direction of the substrate mounting surface 15 a. Since the power storage unit 5 is arranged so as not to overlap the light source unit 3, the heat radiated from the heat radiating unit 31 provided on the power storage unit 5 side is not conducted to the power storage unit 5 but is released to the space 17. Is done. Thereby, the heat dissipation effect of the lighting fixture 1 improves.

  The connecting portion 7 has an arch shape. The light source unit 3 is attached to both end portions 71 of the connecting unit 7. The connecting portion 7 is attached to the heat radiating portion 31. Both end portions 71 of the connecting portion 7 have a bifurcated shape. Thereby, the connection part 7 is attached to the thermal radiation part 31 in four places.

  The power storage 5 is attached to the central portion 72 of the connecting portion 7. The bottom surface of the power storage unit 5 is attached to the central part 72 of the connecting unit 7. The central portion 72 is formed with an opening (details will be described later) through which the power cable 9 is passed. For this reason, when the power cable 9 is wired between the power storage unit 5 and the light source unit 3, the power cable 9 is not drawn out to the outside of the space 17 and inserted into the power storage unit 5 from the side surface. It can be directly inserted into the power storage unit 5 from the bottom via 17. As a result, the power cable 9 can be routed with the shortest length from the light source unit 3 to the power storage unit 5.

  Next, the schematic configuration of the light source unit 3, the power storage unit 5, and the connecting unit 7 will be described in detail with reference to FIGS. 4 to 7 and with reference to FIGS. First, the light source unit 3 will be described with reference to FIGS. FIG. 4 is an external perspective view of the light source unit 3 attached to the connecting unit 7. FIG. 5 is an exploded perspective view of the light source unit 3. FIG. 6 is a diagram schematically showing the fan housing portion 34 as viewed from the mounting surface side to the heat radiating portion 31.

  As shown in FIG. 4, the light source unit 3 includes a heat radiating unit 31 and a fan housing unit 34 attached to the upper part of the heat radiating unit 31. The heat radiating part 31 is formed in a circular shape on the light emission side and has a bowl shape as a whole. The heat dissipating part 31 includes a base part 31d disposed to face the translucent protection part 32, and a hollow cylindrical part 31c formed on the base part 31d at substantially the center of the heat dissipating part 31. . The base portion 31d is formed in a circular shape. The base portion 31d is formed to be inclined so that the height decreases from the hollow cylindrical portion 31c toward the outer peripheral portion. The inside of the hollow cylindrical portion 31c is a cavity into which a power cable 9 (see FIG. 1) wired between the light source unit 3 and the power storage unit 5 is inserted. The heat dissipating part 31 has a plurality of outer fins 31a formed in a thin plate shape so as to be inclined from the hollow cylindrical part 31c toward the outer peripheral part of the heat dissipating part 31 so as to surround the side wall of the hollow cylindrical part 31c. The outer fin 31a is formed upright from the base portion 31d. The heat dissipating part 31 has a plurality of inner fins 31b disposed between adjacent outer fins 31a and formed in a thin plate shape. The inner fin 31b is formed upright from the base portion 31d. The inner fin 31b is formed in a mountain shape. The inner fin 31b is formed so as not to contact the hollow cylindrical portion 31c. The outer fins 31a and the inner fins 31b are alternately arranged around the hollow cylindrical portion 31c.

  The heat radiation part 31 is formed by die casting using aluminum as a forming material. Thereby, as for the thermal radiation part 31, high rigidity, weight reduction, and high heat dissipation are achieved. The shapes and arrangement positions of the outer fins 31a and the inner fins 31b are determined in consideration of the detachability of a die used for die casting and the air permeability during heat dissipation.

  Of the plurality of outer fins 31 a, four outer fins 31 a are formed with attachment portions 31 e for attaching the light source unit 3 to the connecting portion 7. The outer fins 31a on which the attachment portions 31e are formed are arranged at equal intervals. The outer fins 31a on which the attachment portions 31e are formed are provided at intervals of about 90 ° around the central axis of the hollow cylindrical portion 31c. The attachment portion 31e is formed wider than the other region of the outer fin 31a. The attachment portion 31e has a screw hole (not shown) in which a screw is cut on the inner wall surface. The light source part 3 is attached to the connecting part 7 and fixed by screwing the screw S7 with the screw hole of the attaching part 31e in a state where the branch part 73 (details will be described later) of the connecting part 7 is arranged on the attaching part 31e. Is done. The outer fin 31a, the inner fin 31b, the hollow cylindrical portion 31c, the base portion 31d, and the attachment portion 31e are integrally formed.

  Here, the internal structure of the heat radiating part 31 will be described with reference to FIG. As shown in FIG. 5, between the heat radiation part 31 and the translucent protection part 32, in order from the translucent protection part 32 side, an O-ring 35, a substrate 15 on which a plurality of LEDs 2 are mounted, and a substrate The heat sink 37 arrange | positioned at the back side of 15 and the O-ring 39 arrange | positioned between the heat sink 37 and the thermal radiation part 31 are arrange | positioned. In FIG. 5, for easy understanding, a plurality of LEDs mounted on the substrate 15 are represented by white square frames, and the arrangement layout is illustrated differently from FIG. 2. In FIG. 5, the plurality of resistance elements 4, the plurality of capacitance elements 10 a and 10 b and the plurality of connectors 6 a and 6 b (see FIG. 2) and the opening 8 that are originally mounted on the substrate 15 are omitted. ing.

  The translucent protection part 32 has a thin dish shape. The circular bottom surface portion in the thin dish shape serves as a light transmission region 320 of the translucent protection portion 32 that transmits the light emitted from the plurality of LEDs 2. The light transmission region 320 is made of polycarbonate. An inner pressure adjusting portion 32 a is provided on the outer peripheral portion of the light transmission region 320. The internal pressure adjusting part 32 a is a film-like member formed so as to close an opening (not shown) formed in the light transmission region 320. The internal pressure adjustment part 32a has high air permeability. The internal pressure adjusting unit 32a is, for example, a porous film. The internal pressure adjustment unit 32 a prevents the pressure in the space surrounded by the substrate 15, the translucent protection unit 32, and the heat dissipation unit 31 from changing depending on the usage environment of the lighting fixture 1. For example, when the temperature of the usage environment of the luminaire 1 increases and the pressure in the space surrounded by the translucent protection part 32 and the substrate 15 rises, the air in the space is released to the outside via the internal pressure adjustment part 32a. . Thereby, the pressure of the space is adjusted to a steady state.

  The O-ring 35 is disposed on the outer periphery of the light transmission region 320 that does not block the light emitted from the plurality of LEDs 2. In other words, the light emitted from the plurality of LEDs 2 passes through the inner region of the O-ring 35. The O-ring 35 is made of rubber. The substrate 15 is disposed on the O-ring 35 with the substrate mounting surface 15 a facing the light transmission region 320.

  As described above, the first layer of the substrate 15 is an aluminum base, and the heat sink 37 is disposed in contact with the aluminum base. The heat sink 37 is made of aluminum. The heat sink 37 has a thin plate shape and a circular shape with a diameter shorter than that of the substrate 15. The heat sink 37 is formed to be slightly larger than the inner diameter of the hollow cylindrical portion 31c. At the center of the heat sink 37, an opening 37a is formed which is connected to the connectors 6a and 6b (see FIG. 2) and allows the electric wires 9a and 9b inserted into the power cable 9 to pass therethrough. The heat sink 37 is cooled by a cooling fan 36 to be described later and conducts the cold heat to the substrate 15.

  An O-ring 39 disposed between the heat sink 37 and the heat radiating portion 31 is disposed by being fitted into an O-ring receiving portion 310 formed in the heat radiating portion 31. The O-ring receiving part 310 is formed around the end of the hollow cylindrical part 31c and on the inner peripheral side of the base part 31d. The O-ring receiving part 310 is formed in a step shape that is lower than the other regions of the base part 31d. The O-ring 39 is made of rubber. The O-ring 39 is formed thicker than the depth due to the step of the O-ring receiving portion 310. For this reason, in a state where the O-ring 39 is placed on the O-ring receiving portion 310, a part of the O-ring 39 protrudes from the surface of the base portion 31 d facing the heat sink 37. The heat sink 37 is screwed to the base portion 31d by a plurality of screws S19. Further, the substrate 15 covers the heat sink 37 with a plurality of screws S18 and is screwed to the base portion 31d. Since a part of the O-ring 39 protrudes from the surface of the base portion 31d facing the heat sink 37, when the heat sink 37 and the substrate 15 are screwed to the base portion 31d, the O-ring 39 is received by the substrate 15 and the heat sink 37 and the O-ring receiver. Compressed by the unit 310. As a result, a gap is prevented from being generated at the contact portion between the base portion 31d and the heat sink 37 near the O-ring receiving portion 310, and the sealing degree between the base portion 31d and the heat sink 37 is improved.

  Although illustration is omitted, an O-ring packing and a viscous packing are embedded in the opening 37a. The O-ring packing is provided in contact with the inner wall of the opening 37a, and the viscous packing is provided on the inner peripheral side of the O-ring packing. Electric wires 9a and 9b (see FIG. 3) inserted into the power cable 9 are inserted on the inner peripheral side of the viscous packing. Since the electric wires 9a and 9b are pressed by the O-ring packing and the viscous packing, they do not shift in the insertion direction unless a predetermined external force is applied. The opening 37a is closed by the O-ring packing, the viscous packing, and the electric wires 9a and 9b. Thus, the opening 37a formed in the heat sink 37 is closed by an O-ring packing or the like, and the base 31d and the heat sink 37 are sealed.

  The substrate 15 covers the heat sink 37 and is screwed to the heat radiating portion 31. As a result, the entire surface of the heat sink 37 is in surface contact with the aluminum base material of the substrate 15. For this reason, the heat sink 37 can conduct the cold heat from the cooling fan 36 to the substrate 15 not locally but over the entire surface. Further, the surface of the aluminum base material is polished, and the adhesion between the substrate 15 and the heat sink 37 is improved. Thereby, the cooling efficiency of the board | substrate 15 improves. Moreover, the board | substrate 15 is contacting the base part 31d in the area | region except the area | region which is contacting the heat sink 37 among the areas where the aluminum base material opposes the base part 31d. Since the surface of the aluminum base material of the substrate 15 is polished and can be brought into contact with the base portion 31d, the heat generated from the LED 2 can be efficiently conducted to the heat radiating portion 31. Thus, in this embodiment, since the inner region of the substrate 15 is efficiently cooled via the heat sink 37 and the outer region of the substrate 15 efficiently dissipates heat, the temperature of the substrate 15 rises due to light emission of the LED 2. Is prevented. Further, in the present embodiment, the cooling mechanism of the inner region and the outer region of the substrate 15 is not distinguished, the cold heat that has cooled the inner region is conducted to the outer region and contributes to the cooling of the outer region, The heat generated by the LEDs 2 arranged in the inner region is radiated from the heat radiating part 31 through the outer region.

  The translucent protection part 32 on which the O-ring 35 is placed is fixed to the heat radiation part 31 to which the substrate 15 and the heat sink 37 are attached using the fall prevention part 33. Three drop prevention portions 33 are provided around the central axis 15b of the substrate 15 at intervals of about 180 °. As shown in FIGS. 4 and 5, the fall prevention unit 33 includes a bifurcated portion 33a having a notch for sandwiching the outer fin 31a, a flat plate portion 33b formed substantially orthogonal to the bifurcated portion 33a, and a flat plate portion 33b. And a folded portion 33c formed by folding the end portion in a direction in which the bifurcated portion 33a extends.

  The tip of the bifurcated portion 33a is formed in a key claw shape. Thereby, the front-end | tip of the forked part 33a can be hooked on the hollow cylindrical part 31c. The bifurcated portion 33a is cut to such a length that the distal end of the outer fin 31a does not contact the flat plate portion 33b in a state where the distal end of the bifurcated portion 33a is hooked on the hollow cylindrical portion 31c. The bifurcated portion 33a is formed so as to increase in thickness from the tip toward the flat plate portion 33b in accordance with the inclination angle of the base portion 31d. Thereby, when the heat radiation part 31 and the translucent protection part 32 are fixed by the fall prevention part 33, the base part 31d comes to be pressed by the whole fork part 33a.

  The flat plate portion 33b has a flat plate shape. When the heat radiating part 31 and the translucent protection part 32 are fixed by the fall prevention part 33, the flat plate part 33b presses the heat radiating part 31 with the bifurcated part 33a, and the folded part 33c presses the translucent protective part 32. It is formed to a length that can be. The flat plate portion 33 b is disposed to face the side wall 321 of the translucent protection portion 32 when the heat radiating portion 31 and the translucent protection portion 32 are fixed by the fall prevention portion 33. The folded portion 33c is disposed in contact with the light transmission region 320 when the heat radiating portion 31 and the translucent protection portion 32 are fixed by the fall prevention portion 33. At this time, the folded portion 33c presses the light transmission region 320 so as to push up the translucent protection portion 32 toward the heat radiating portion 31 side.

  The inner wall surface of the side wall 321 of the translucent protection part 32 has a diameter longer than the diameter of the base part 31d. For this reason, when the heat radiating part 31 and the translucent protective part 32 are overlapped, the heat radiating part 31 is fitted inside the translucent protective part 32. The fall prevention part 33 is attached in a state in which the heat radiation part 31 is fitted inside the translucent protection part 32. More specifically, in order to attach the fall prevention part 33 to the heat radiation part 31 and the translucent protection part 32, the tip is hooked on the hollow cylindrical part 31c while the outer fin 31a is sandwiched between the notches of the bifurcated part 33a. While the tip is hooked on the hollow cylindrical portion 31c, the forked portion 33a is bent while bending the flat plate portion 33b in a direction opposite to the direction in which the forked portion 33a extends so that the folded portion 33c does not collide with the end of the base portion 31d. It is made to contact the base part 31d. At this time, the external force applied to bend the fall prevention unit 33 is a force that does not cause the fall prevention unit 33 to be plastically deformed. Then, the external force applied to the fall prevention part 33 in order to curve the flat plate part 33b is cancelled | released. The fall prevention part 33 is made of a metal material (for example, stainless steel). When the external force applied to the fall prevention part 33 is released, the elastically deformed flat plate part 3b returns to the original flat plate shape. When the flat plate portion 33b returns to the flat plate shape, the folded portion 33c is held in a state of coming into contact with the light transmission region 320 by going around to the light transmission region 320 side. As a result, the bifurcated portion 33 a and the folded portion 33 c press the light source unit 3 in the opposite direction, so that the state where the heat radiating unit 31 is fitted inside the translucent protection unit 32 is maintained. Further, when the lighting apparatus 1 is installed on the ceiling of the house with the light source unit 3 facing down, the folding portion 33c applies a force toward the ceiling side to the translucent protection unit 32, so that the fall prevention unit 33 is translucent. The property protection part 32 can be prevented from falling.

  Since the O-ring 35 is sandwiched between the heat radiating part 31 and the translucent protective part 32, the O-ring 35 is fixed when the heat radiating part 31 and the translucent protective part 32 are fixed by the fall preventing part 33. Is compressed by the base portion 31d and the light transmission region 320. As a result, a gap is prevented from being generated at the contact portion between the base portion 31d and the light transmission region 320, and the sealing degree between the base portion 31d and the light transmission region 320 is improved.

  Next, a schematic configuration of the fan accommodating portion 34 will be described. As shown in FIG. 4, a fan accommodating portion 34 is disposed at the end of the hollow cylindrical portion 31 c of the heat radiating portion 31. The fan accommodating portion 34 is disposed so as to close the opening of the hollow cylindrical portion 31c. The fan accommodating part 34 has a bell shape.

  As shown in FIG. 5, the fan accommodating portion 34 includes a fan fixing portion 34 a that fixes a cooling fan 36 (not shown in FIG. 5), and dust or the like in the fan accommodating portion 34 that is provided at the end of the fan fixing portion 34 a. A dust-proof part 34b for preventing the entry of the first cable gland, a first cable gland 34c screwed into the opening of the dust-proof part 34b, and a second cable gland 34d for fastening the power cable 9 (see FIG. 1) to the first cable gland 34c. And have. The fan fixing part 34a and the dustproof part 34b are formed of a mixture of nylon and glass filler. Thereby, the fan fixing | fixed part 34a and the dust-proof part 34b ensure high rigidity and high durability.

  As shown in FIG. 6, a cooling fan 36 is fixed to the end of the fan fixing portion 34 a that closes the opening of the hollow cylindrical portion 31 c of the heat radiating portion 31. The cooling fan 36 is disposed on the heat radiating part 31. The cooling fan 36 is fixed to the fan fixing portion 34a by a screw S20. The cooling fan 36 is an axial blower. The cooling fan 36 sucks outside air from an air inlet 341 (details will be described later) formed in the fan fixing portion 34a of the fan accommodating portion 34, and blows the cold air to the heat sink 37 through the hollow cylindrical portion 31c. Yes. The hollow cylindrical portion 31c serves as a cold air flow path. A region 345 between the fan fixing portion 34a and the cooling fan 36 is a region where a power cable 36a that supplies power to the cooling fan 36 is routed.

  Returning to FIG. 4, the fan housing part 34 prevents a finger from entering the inside of the fan housing part 34 from the plurality of air inlets 341 that sucks outside air into the fan housing part 34. And an intrusion prevention unit 342. The entry preventing portion 342 is formed for each intake port 341. The air inlet 341 and the entry preventing part 342 are formed in the fan fixing part 34a. In order to arrange the cooling fan 36, the fan fixing portion 34a is formed such that one end portion on the heat radiating portion 31 side is wider than the other end portion on the dustproof portion 34b side. For this reason, the fan fixing | fixed part 34a has two area | regions, the comparatively thick area | region by the side of one end, and the comparatively thin area | region by the side of the other end. The intake port 341 is formed at the boundary between the thick region and the thin region. The side surface of the narrow region has a concave shape that is recessed inward from the other end side toward the boundary portion. A trapezoidal opening formed at the boundary between the thick region and the thin region by recessing the side surface of the thin region becomes the air inlet 341. A total of eight intake ports 341 are formed on the side wall of the fan fixing portion 34a. The intake port 341 communicates with a region where the cooling fan 36 is fixed. As a result, the cooling fan 36 can suck outside air from the air inlet 341 and blow down the cooling air toward the heat radiating portion 31. Further, the cooling fan 36 is disposed at a predetermined distance from the air inlet 341. Thereby, the lighting fixture 1 prevents that a wind noise is produced.

  The intrusion prevention unit 342 has a Y shape and is formed to be stretched over the intake port 341. The intrusion prevention part 342 is formed radially in three directions from the center of the air inlet 341 toward the side wall of the fan fixing part 34a. One of the three directions extends toward the side of the thin area of the fan fixing portion 34a, and the remaining two extend toward the side of the thick area of the fan fixing portion 34a. The intrusion prevention unit 342 is formed so as to extend over the intake port 341, thereby dividing the opening region of the intake port 341 into three. Accordingly, the entry preventing unit 342 can narrow one area of the opening region of the intake port 341 as compared to the case where the entry preventing unit 342 is not formed in the intake port 341. The area of each of the three divided opening regions is wide enough for a finger not to be inserted. For this reason, the entry preventing unit 342 can prevent a finger from entering the inside of the fan housing unit 34 from the air inlet 341. In addition, since the intrusion prevention unit 342 has a Y shape, even if it is disposed at the intake port 341, the inflow path of outside air at the intake port 341 is hardly obstructed. Therefore, the entry preventing unit 342 can sufficiently secure the intake of outside air into the fan housing unit 34 and can prevent the finger from entering the fan housing unit 34.

  The fan accommodating part 34 has a screw receiving part 344 on the side wall of the thick area of the fan fixing part 34a. The screw receiving portion 344 has a concave shape in which a part of the side wall is recessed in a direction orthogonal to the central axis of the opening to which the cooling fan 36 is fixed. The fan accommodating portion 34 is screwed to the heat radiating portion 31 by a screw S16 inserted into a screw hole (not shown) formed in the screw receiving portion 344.

  The fan fixing portion 34a has an opening (not shown) through which a power cable for supplying power to the cooling fan 36 and the LED 2 is inserted at the other end opposite to the one end where the cooling fan 36 is disposed. ing. For this reason, a dustproof part 34b is arranged at the other end of the fan fixing part 34a in order to prevent dust and the like from entering the fan accommodating part 34 through this opening. The dustproof part 34b has a bowl shape with an opening formed on the bottom surface. The opening formed in the bottom surface is provided for inserting a power cable for supplying power to the cooling fan 36 and the LED 2. The dustproof portion 34b has a plurality of screw receiving portions 343 formed on the side wall. The screw receiving portion 343 has a concave shape in which a part of the side wall is recessed in a direction orthogonal to the central axis of the screw hole formed in the bottom portion. The dustproof portion 34b is screwed to the fan fixing portion 34a by a screw S17 inserted into a screw hole (not shown) formed in the screw receiving portion 343.

  A first cable gland 34c is disposed in a screw hole formed in the bottom of the dustproof portion 34b. The first cable gland 34c has a hollow shape into which the power cable 9 can be inserted. Screws are cut on both side surfaces of the first cable gland 34c. A screw formed on one side surface of the first cable gland 34c on the dustproof portion 34b side is adapted to be screwed into a screw hole on the bottom of the dustproof portion 34b. Thereby, the first cable gland 34c is fixed to the dust-proof portion 34b. A packing (not shown) made of, for example, ethylene-propylene-diene rubber (EPDM) is provided on one end side of the first cable gland 34c. Thereby, when the first cable gland 34c is screwed into the dustproof portion 34b, the degree of adhesion between the first cable gland 34c and the dustproof portion 34b is improved.

  The second cable gland 34d has a nut shape. On the inner side surface of the second cable gland 34d, a screw that can be screwed with a screw formed on the other end side surface of the first cable gland 34c is cut. When the second cable gland 34d is screwed onto the other end side of the first cable gland 34c, the other end side of the first cable gland 34c receives an inward force from the second cable gland 34d. Therefore, when the second cable gland 34d is screwed into the first cable gland 34c with the power cable 9 inserted into the hollow portions of the first cable gland 34c and the second cable gland 34d, the power cable 9 It is pressed by the other side surface of the cable gland 34c. As a result, the power cable 9 does not shift in the insertion direction and is fixed to the first cable gland 34c. Therefore, when the first cable gland 34 c to which the power cable 9 is fixed is screwed to the fan housing part 34 attached to the heat radiating part 31, the power cable 9 is fixed to the heat radiating part 31. Further, a packing (not shown) made of, for example, EPDM is provided on one end side of the second cable gland 34d disposed on the other end side of the first cable gland 34c. Thereby, when the second cable gland 34d is screwed to the first cable gland 34c, the degree of adhesion between the second cable gland 34d and the first cable gland 34c is improved.

  The first and second cable glands 34c and 34d are formed of a resin material such as nylon (for example, 66 nylon). The power cable 9 is fixed to the dust-proof portion 34b while being inserted into the first and second cable glands 34c and 34d. For this reason, the power cable 9 contacts the first and second cable glands 34c and 34d formed of a resin material when the lighting fixture 1 is used, but does not contact the dustproof portion 34b having high rigidity. As a result, it is possible to prevent the power cable 9 from being short-circuited or cut due to scratches on the covering of the power cable 9 or the like when the lighting apparatus 1 is used. Thus, the 1st and 2nd cable glands 34c and 34d exhibit the function as a grommet. Furthermore, the first and second cable glands 34c and 34d also exhibit a dustproof effect for preventing dust and the like from entering the fan housing portion 34 through screw holes formed in the bottom of the dustproof portion 34b.

  Next, a schematic configuration of the connecting portion 7 will be described. As shown in FIGS. 3 and 4, the connecting portion 7 includes a space forming portion 70 that forms a space 17 between the power storage portion 5 and the heat radiating portion 31, and both end portions 71 of the connecting portion 7 as heat radiating portions. 31 has a branching portion 73 for branching the end portion of the space forming portion 70 and a fixing portion 74 for fixing the space forming portion 70 and the branching portion 73 so as to be attached at two locations. The space forming part 70, the branch part 73, and the fixing part 74 are made of stainless steel. The connecting portion 7 has a strength that does not deform due to the weight of the light source portion 3 when the lighting fixture 1 is attached to the ceiling. Further, the connecting portion 7 has such a strength that it does not deform due to the weight of the power supply housing portion 5 when the lighting fixture 1 is placed on the floor surface or the like toward the lower side of the light source portion 3.

  The space forming part 70 has a seat part 70a in which the power storage part 5 is disposed and a pair of leg parts 70b formed at both ends of the seat part 70a. The seat part 70a has a thin plate linear shape, and a position corresponding to the central part 72 of the connecting part 7 is formed wide. The wide portion has a square shape with four corners chamfered, and is a portion mainly in contact with the bottom surface 51 f of the box portion 51 of the power storage unit 5. The wide portion is formed to be slightly smaller than the bottom surface 51f, and does not protrude from the bottom surface 51f when the power storage unit 5 is fixed to the seat 70a.

  The seat portion 70a has an opening 700 for inserting the power cable 9 routed from the heat radiating portion 31, and through holes H701 and H702 for inserting screws S13 and S15 for fixing the power storage portion 5. Is formed. The opening 700 is formed at a position slightly deviated from the center of the seat 70a. The opening 700 has a diameter longer than the diameter of the power cable 9 so that the power cable 9 can be inserted. The through hole H701 is formed at the center of the seat portion 70a, and the screw S13 is inserted therein. Two through holes H702 are formed across the through hole H701, and a screw S15 (only one screw S15 is shown) is inserted therein. Although details will be described later, the power storage unit 5 is fixed to the connecting unit 7 by the screw S13, the nut N2 screwed into the screw S13, and the two screws S15. By forming the through hole H701 at the center of the seat portion 70a, the external force applied to the seat portion 70a by the screw S13 and the nut N2 is prevented from being biased in the plane of the seat portion 70a. As a result, even if an external force is applied to the box portion 51 of the power storage unit 5, the power storage unit 5 is unlikely to be detached from the connecting unit 7.

  The pair of leg portions 70b has a thin plate rectangular shape. The pair of leg portions 70 b are formed so that the seat portion 70 a extends in a direction substantially orthogonal to the contact surface that contacts the bottom surface 51 f of the box portion 51. The pair of leg portions 70b is formed integrally with the seat portion 70a, is bent in a curved shape with respect to the seat portion 70a, and extends downward. The pair of leg portions 70b are disposed to face each other with a gap longer than the length of one side of the bottom surface 51f of the box portion 51. For this reason, the pair of leg portions 70b protrudes from the bottom surface 51f when the power storage portion 5 is fixed to the connecting portion 7. The leg 70b has a curved tip that protrudes toward the tip. A through hole H703 into which the screw S11 is inserted is formed at the tip portion. This tip portion constitutes an end portion 71 of the connecting portion 7 together with the branch portion 73 and the fixing portion 74.

  The branch part 73 has a contact part 730 that is formed in a circular shape and contacts the tip part of the leg part 70b, and a branch part 732 that extends in the opposite direction across the contact part 730 and extends downward stepwise. . The branch part 73 has a thin plate U-shape. In the center of the contact portion 730, a through hole H730 into which the screw S11 is inserted is formed. Although details will be described later, the branching portion 73 is screwed to the space forming portion 70 by a screw S11. The ends of the branch portions 732 are formed by being bent substantially vertically. An opening is formed at the bent tip. As shown in FIG. 4, the branch portion 73 is screwed to the attachment portion 31 e of the heat radiating portion 31 by a screw S <b> 7 inserted into the opening.

  The fixing portion 74 has a T shape. A pair of claw portions 741 bent in a direction orthogonal to the width direction is formed at the end of the region extending from the central portion of the fixed portion 74. A pair of claw portions 742 bent in a direction orthogonal to the width direction is formed at each end of the region extending in the left-right direction of the fixing portion 74. The claw portion 741 and the claw portion 742 are bent in the same direction. The pair of claw portions 741 has a longer interval than the width of the leg portion 70b. The claw part 742 has a longer interval than the width of the branch part 732. The fixing portion 74 has a through hole H743 formed at an equal distance from the both ends where the claw portion 742 is formed toward the center direction and into which the screw S11 is inserted.

  The through hole H703 formed in the leg part 70b, the through hole H734 formed in the branch part 73, and the through hole H743 formed in the fixing part 74 are arranged in a straight line in this order, and the leg part 70b and the branch part 73 are arranged. When the fixing portion 74 is combined, as shown in FIG. 4, the leg portion 70 b is disposed between the pair of claw portions 741, and the branch portion 732 is disposed between the pair of claw portions 742. The leg portion 70b, the branching portion 73, and the fixing portion 74 in a state of being combined with each other in this way are the screw S11 inserted into the through holes H743, 734, 703 from the fixing portion 74 side, and the screw S11 protruding from the through hole H703. Are fixed to each other by a nut N1 screwed to the end of the leg from the leg 70b side. When the leg portion 70b, the branching portion 73, and the fixing portion 74 are fixed to each other by the screw S11 and the nut N1, for example, even if a rotational force with the through hole H703 as a rotation axis is applied to the space forming portion 70 from the outside, a pair of One of the claw portions 741 contacts the side surface of the leg portion 70b and prevents the space forming portion 70 from rotating. For example, even if a rotational force having the through-hole H734 as a rotation axis is applied to the branch portion 73 from the outside, one of the pair of claw portions 742 contacts the side surface of the branch portion 732 and the branch portion 73 rotates. To prevent. Therefore, as shown in FIG. 1, in a state where the light source unit 3 and the power storage unit 5 are connected by the connection unit 7, the rotational force with the through holes 703 and 730 as the rotation axis is generated. Even if it adds to, the lighting fixture 1 can maintain the state by which the center point 500 of the power storage part 5 and the central axis 15b of the board | substrate 15 are arrange | positioned on the straight line. As shown in FIG. 3, the center point 500 of the power storage unit 5 is a point where four virtual diagonal lines from the upper surface 51 d of the box unit 51 toward the bottom surface 51 f (or in the opposite direction) intersect. In FIG. 3 and FIG. 7 to be described later, for easy understanding, the center point 500 is illustrated by the “×” mark. However, the “×” mark actually exists in the center of the power storage unit 5. is not.

  Next, a schematic configuration of the power storage unit 5 will be described. FIG. 7 is a diagram illustrating an internal configuration of the power storage unit 5 with the lid 52 removed. As shown in FIG. 7, the power storage unit 5 is fixed to the connecting unit 7 by a screw S13 and a nut N2 screwed to the screw S13. Further, the power storage 5 is fixed to the connecting portion 7 by a screw S15 (see FIG. 3) in addition to the screw S13 and the nut N2. A through hole (not shown) for inserting the screw S13 is formed in the approximate center of the bottom surface 51f of the box portion 51 of the power storage unit 5. When the bottom surface 51f and the seat portion 70a (see FIG. 3) of the connecting portion 7 face each other in order to fix the power storage portion 5 to the connecting portion 7, the through hole is formed with a through hole H701 formed in the seat portion 70a. It is supposed to overlap. Accordingly, the screw S13 can be inserted into the through hole formed in the through hole H701 and the bottom surface 51f. Further, two screw holes (not shown) are formed on the bottom surface 51f with a through hole for inserting the screw S13 interposed therebetween. When the bottom surface 51f and the seat portion 70a of the connecting portion 7 face each other in order to fix the power storage portion 5 to the connecting portion 7, the two screw holes respectively correspond to the two through holes H702 formed in the seat portion 70a. It is supposed to overlap. As a result, the screw S15 can be screwed into the screw hole formed in the bottom surface 51f through the through hole H702.

  The power storage unit 5 includes rectangular parallelepiped drive power supply circuits 13 a and 13 b fixed to a pair of side surfaces 51 a and 51 b inside the box 51. The drive power supply circuit 13a is fixed to the side surface 51a, and the drive power supply circuit 13b is fixed to the side surface 51b. Screw receiving portions 135a are formed at both ends in the longitudinal direction of the driving power supply circuit 13a, and screw receiving portions 135b are formed at both ends in the longitudinal direction of the driving power supply circuit 13b. The drive power supply circuit 13a holds the screw receiving portion 135a between a screw S3 inserted into a through hole (not shown) formed in the side surface 51a and a nut N3 (see FIG. 1) screwed into the screw S3. By this, it is fixed to the side surface 51a. The driving power supply circuit 13a is fixed to the side surface 51a on the inner side of the power storage unit 5 at a total of four locations, two on each of the upper and lower sides. The driving power supply circuit 13b is fixed to the side surface 51b by being sandwiched between a screw S3 inserted into through holes H510 and H513 formed in the side surface 51b and a nut N3 (see FIG. 1) screwed into the screw S3. Is done. The drive power supply circuit 13b is fixed to the side surface 51b on the inner side of the power storage unit 5 at a total of four locations, two on each of the upper and lower sides.

  An opening 51 e for inserting the power cable 11 is formed on the upper surface 51 d of the box portion 51. The opening 51e is formed substantially at the center of the upper surface 51d (see FIG. 3). The power storage unit 5 includes a power cable fixing unit 512 that is positioned so as to overlap the opening 51e and is stretched between the pair of side surfaces 51a and 51b of the box unit 51. The power cable fixing portion 512 has a box shape with the drive power circuit 13a, 13b side opened. Two screw holes (not shown) are respectively formed on the side surfaces of the power cable fixing portion 512 facing the pair of side surfaces 51a and 51b (see FIG. 3). Two through holes H511 (the through hole H511 on the side surface 51a is not shown) are formed at predetermined positions on the side surfaces 51a and 51b of the box 51 (see FIG. 3). When the power cable fixing part 512 is fixed to the box part 51, the through hole H 511 and the screw hole formed in the power cable fixing part 512 are arranged with each other. Thereby, the power cable fixing portion 512 is screwed to the side surfaces 51a and 51b of the box portion 51 by the screws S1 inserted from the pair of side surfaces 51a and 51b side.

  The power cable fixing portion 512 has a screw hole (not shown) at a position overlapping the opening 51 e formed on the upper surface 51 d of the box portion 51. The power cable 11 is fixed to the power storage unit 5 by a cable gland 12 attached to the power cable 11. A screw that can be screwed into the screw hole of the power cable fixing portion 512 is cut on the end surface of the cable gland 12 that is inserted into the screw hole of the power cable fixing portion 512 through the opening 51e. The power cable 11 is fixed to the power storage unit 5 by screwing the cable gland 12 into the screw hole of the power cable fixing unit 512.

  As shown in FIG. 3, the power cable 11 has two electric wires 11a and 11b and a covering portion 11c that covers the electric wires 11a and 11b. The electric wire 11a is connected to the input terminal 131a of the driving power supply circuit 13a, and the electric wire 11b is connected to the input terminal 131b of the driving power supply circuit 13b. The electric wires 11a and 11b are wired inside the power cable fixing portion 512 and connected to the input terminals 131a and 131b, respectively. In FIG. 7, the covering portion 11 c is illustrated in a length that reaches the center point 500 of the power storage unit 5, but actually, the covering portion 11 c only extends to the vicinity of the input terminals 131 a and 131 b. Thereby, since the distance from the edge part of the coating | coated part 11c to the input terminals 131a and 131b becomes short, the routing length of the electric wires 11a and 11b in the power supply accommodating part 5 can be shortened.

  As shown in FIGS. 3 and 7, the power cable 9 includes two electric wires 9a and 9b and a covering portion 9c that covers the electric wires 9a and 9b. The power cable 9 is fixed to an opening 700 formed in the connecting portion 7 and a through hole (not shown) formed in the bottom surface 51 f of the box portion 51. The electric wires 9a and 9b are exposed from the end portion of the covering portion 9c and are routed around the power storage portion 5. The electric wire 9a is connected to the output terminal 133a of the driving power supply circuit 13a, and the electric wire 9b is connected to the output terminal 133b of the driving power supply circuit 13b. In FIG. 7, the electric wires 9a and 9b are not connected to the output terminals 133a and 133b.

  The electric wire 9a is connected to the connector 6a, and the electric wire 9b is connected to the connector 6b. For this reason, the drive power supply circuit 13a is used to drive a plurality of LEDs 2 mounted in any two of the regions α, β, γ, and ε (see FIG. 2) of the substrate 15, and the drive power supply The circuit 13b is used to drive the plurality of LEDs 2 mounted on the remaining area of the substrate 15 (see FIG. 2). In addition, one of the drive power supply circuits 13 a and 13 b is also used as a power supply for driving the cooling fan 36. The driving power supply circuits 13a and 13b each have an output power set to 100 W or less, for example. In the present embodiment, not all LEDs are driven by a single high power driving power supply circuit, but a plurality (two in this example) of driving power circuits for low power or medium power. By this, all the LEDs are driven. Thereby, according to the lighting fixture 1 by this embodiment, the power consumption of one drive power supply circuit can be reduced and heat generation can be suppressed.

  The power storage unit 5 can attach the power cables 11 and 9 to the upper surface 51d and the bottom surface 51f facing the input terminals 131a and 131b and the output terminals 133a and 133b of the drive power supply circuits 13a and 13b, respectively. . Thereby, the lighting fixture 1 can wire a power supply in one direction from the upper surface 51d toward the bottom surface 51f. As a result, the luminaire 1 can simplify the wiring of the power cable and improve the work efficiency of the wiring work.

  A locking receiving portion 51 c is formed on the upper surface 51 d of the box portion 51. The locking receiving portion 51c is formed in an elongated linear shape having an upper surface 51d opened. The latch receiving portion 51 c is formed in the vicinity of one end side of the box portion 51 on the opening side. The latch receiving portion 51 c can latch the latch portion 52 b formed on the lid portion 52. The locking portion 52b is formed to be insertable into the locking receiving portion 51c. The locking portion 52b is formed in a key claw shape. When the lid portion 52 is opened in a state where the locking portion 52b is locked to the locking receiving portion 51c, the lid portion 52 is near one end side on the opening side of the box portion 51, that is, with the locking receiving portion 51c as a rotation axis. It can be rotated. Thus, the inside of the power storage unit 5 can be viewed in a state where the lid part 52 is locked to the box part 51 without removing the lid part 52 from the box part 51.

  As shown in FIG. 3, the lid portion 52 has two through holes H521 formed on the end side facing the end side on which the locking portion 52b is formed. On the other hand, the opening part of the box part 51 is formed with a folded part 510 at an end side where the latch receiving part 51c is formed and an opposite end side facing the end side. Two screw holes H514 are formed in the folded portion 510 on the opposite end side. When the lid portion 52 is overlaid on the opening of the box portion 51, the two screw holes H512 and the two screw holes H514 are arranged to overlap each other. The lid portion 52 is screwed and fixed to the box portion 51 by a screw S5 inserted into the screw hole H512 and the screw hole H514 overlapped with each other and screwed with the screw hole H514.

  A plurality of heat radiation ports 51g are formed on the side surface of the box portion 51 that faces the lid portion 52 when the lid portion 52 is fixed to the box portion 51 (see FIG. 7). The heat radiation port 51g is formed by opening this side surface in, for example, a rectangular shape. For example, the same number of heat radiation ports 51g as the heat radiation ports 52a (see FIG. 3) formed in the lid portion 52 are formed. Since the power storage 5 has a plurality of heat radiation ports 51g and 52a, the heat generated by the drive power supply circuits 13a and 13b can be radiated to the outside. Further, since the plurality of heat radiation ports 51g and the plurality of heat radiation ports 52a are arranged to face each other, the outside air flowing from the outside into the power storage unit 5 does not stay in the power storage unit 5. Easy to pass. Thereby, the inside of the power supply accommodating part 5 is cooled efficiently.

  As described above, in the lighting fixture 1 according to the present embodiment, the power storage unit 5 is disposed so as not to protrude from the light source unit 3 when viewed from the board mounting surface 15 a side. Furthermore, in the luminaire 1, the longitudinal direction of the power storage unit 5 is arranged along the axial direction of the central axis 15 b of the substrate 15. That is, the luminaire 1 is formed with the light source 3 having the widest width among the members constituting the luminaire 1 and has a vertically long shape as a whole. For this reason, when the plurality of lighting fixtures 1 are arranged on the floor surface with the light source portion 3 facing downward, the lighting fixture 1 has the same region as the lighting fixture having a wider component than the light source portion. Can be arranged more. In particular, when the lighting fixture 1 is attached to the ceiling using, for example, a forklift, the number of lighting fixtures that can be loaded on the forklift at a time is larger than in the past. For this reason, since the number of times of mounting the lighting fixtures on the forklift is reduced by the time the mounting operation of all the lighting fixtures on the ceiling is completed, the lighting fixture mounting operation is not complicated and the work time is shortened. Can be achieved. Thereby, the cost reduction of the attachment operation | work of a lighting fixture can be achieved.

  Moreover, since the lighting fixture 1 by this embodiment does not have a structural member of the width | variety wider than the width | variety of the light source part 3, the clearance gap produced between the adjacent light source parts 3 is reduced as much as possible, and a light source part The lighting fixture 1 can be installed on the ceiling or the like as if 3 are continuous.

  Further, in the lighting fixture 1 according to the present embodiment, the space 17 is provided on the heat radiation side of the heat radiation unit 31 provided in the light source unit 3. For this reason, since the area which the heat radiating part 31 touches external air becomes large, the lighting fixture 1 can thermally radiate the heat | fever which generate | occur | produced in the light source part 3 efficiently. Furthermore, the lighting fixture 1 can form in the space 17 a flow of air that the fan accommodating portion 34 sucks into the light source portion 3. For this reason, since the luminaire 1 can efficiently cool the light source unit 3 by sucking outside air into the light source unit 3, the cooling efficiency can be improved.

(Modification)
Next, the lighting fixture by the modification of this embodiment is demonstrated using FIG. The lighting fixture according to this modification has the same configuration as that of the lighting fixture 1 except that the power storage section stores one driving power supply circuit and the board on which the LED is mounted is different. . FIG. 8 is a view of the substrate 15 viewed from the substrate mounting surface 15a side in the present modification. Note that components having the same functions and operations as those of the substrate 15 shown in FIG.

  As shown in FIG. 8, a plurality of LEDs 2 and a plurality of resistance elements 4 are mounted concentrically on the substrate mounting surface 15a. In FIG. 8, only one LED and one resistance element are provided with reference numerals, but white rectangles in FIG. 8 (excluding white rectangles representing capacitive elements 10a and 10b described later) represent LEDs. A rectangle with dotted hatching represents a resistance element. Six concentric circles are formed by the plurality of LEDs 2 and the plurality of resistance elements 4 on the substrate mounting surface 15a. A plurality of LEDs 2 are arranged on concentric circles in the first, third, fifth, and sixth rows from the outer peripheral side of the substrate 15, and a plurality of resistance elements 4 are arranged on the fourth concentric circles. ing.

  A circular opening 8 is formed in the center of the substrate 15. The midpoint of the opening 8 is the central axis 15 b of the substrate 15. On the board mounting surface 15a, at least one (two in this modification) connectors 6a and 6b are mounted. The connectors 6a and 6b are arranged at the center of the board mounting surface 15a with the opening 8 interposed therebetween. The connectors 6a and 6b are configured to supply a current output from one driving power supply circuit (not shown) to the plurality of LEDs 2. Two capacitive elements 10a are mounted on the board mounting surface 15a on the rear side of the connector 6a. Two capacitive elements 10b are mounted on the board mounting surface 15a on the rear side of the connector 6b. The capacitive elements 10a and 10b exhibit a function as a bypass capacitor.

  The plurality of LEDs 2 are arranged on the board mounting surface 15a so as to surround the connectors 6a and 6b. The plurality of resistance elements 4 are disposed on the board mounting surface 15a so as to surround the connectors 6a and 6b. The connector 6a is a connector for supplying current to the plurality of LEDs 2 mounted on the board mounting surface 15a in the region α on the left side in FIG. The connector 6b is a connector for supplying current to the plurality of LEDs 2 mounted on the board mounting surface 15a in the region β on the right side in FIG. One of the plurality of LEDs 2 arranged on the first to third concentric circles, and one resistor of the plurality of resistance elements 4 arranged on the fourth concentric circle The element and one LED of the plurality of LEDs 2 arranged on one of the concentric circles on the fifth and sixth rows of concentric circles are connected in series.

  Therefore, from the outer peripheral side of the substrate 15 toward the opening 8 side, “the first row of LEDs 2-2, the second row of LEDs 2-3, the second row of LEDs 2-4, the fourth row resistance elements 4-5, or the sixth row The LED and the resistance element are connected in series in the order of “LED2”. Four LEDs connected in series and one resistance element 4 are connected in parallel in each of the regions α and β. More specifically, the anodes of the plurality of LEDs 2 arranged in the region α on the first row of concentric circles are connected to each other and connected to the positive terminal of the connector 6a. The cathodes of the plurality of LEDs 2 arranged in the region α on the fifth and sixth concentric circles are connected to each other and connected to the negative terminal of the connector 6a. Similarly, the anodes of the plurality of LEDs 2 arranged in the region β on the first row of concentric circles are connected to each other and connected to the positive terminal of the connector 6b. The cathodes of the plurality of LEDs 2 arranged in the region β on the fifth and sixth concentric circles are connected to each other and connected to the negative terminal of the connector 6b.

  As shown in FIG. 8, the plurality of LEDs 2 are discretely arranged on the substrate mounting surface 15a. In this modification, the number of the plurality of LEDs 2 mounted on the board mounting surface 15 is smaller than the number of the plurality of LEDs 2 mounted on the board mounting surface 15 shown in FIG. It is attached to the ceiling or the like, and is separated from the place where the luminaire projects light by a predetermined distance. For this reason, when the luminaire is viewed from the place where the light is projected, it appears as if the luminaire is emitting light on the entire surface of the substrate mounting surface 15a.

The present invention is not limited to the above embodiment, and various modifications can be made.
In the said embodiment, although the fan accommodating part 34 has accommodated the cooling fan 36, this invention is not limited to this. Although the fan accommodating part 34 has the same shape, it does not need to accommodate the cooling fan 36. Since the board | substrate 15 is arrange | positioned closely with the heat sink 37 and the thermal radiation part 31, the heat | fever generate | occur | produced from LED2 mounted in the board | substrate 15 can be thermally radiated efficiently.

  In the above-described embodiment, the power storage unit 5 is configured to be able to be opened and closed by rotating the lid 52 with the locking receiving part 51c as a rotation shaft, but the present invention is not limited to this. For example, even if the power storage unit 5 is configured to be openable and closable by sliding the lid with respect to the box, the same effect as in the above embodiment can be obtained.

  In the said embodiment, although the power storage part 5 has a rectangular parallelepiped shape, this invention is not limited to this. The shape of the power storage unit 5 is not limited to a rectangular parallelepiped shape as long as it does not protrude from the light source unit 3 and can store a driving power supply circuit. The shape may also be Also in this case, the same effect as the above embodiment can be obtained.

  In the said embodiment, although the connection part 7 is comprised by three members, the space formation part 70, the branch part 73, and the fixing | fixed part 74, this invention is not limited to this. As for a connection part, the space formation part and the branch part may be integrally formed, without using a fixing | fixed part. Further, the connecting portion is not limited to the shape in the above embodiment, and has a configuration and strength that does not rotate or change the relative positional relationship between the light source portion and the power storage portion when an external force is applied. Any other shape may be used as long as a space is secured between the unit and the power storage unit.

  The internal pressure adjusting part 32a in the above embodiment may have waterproofness and dustproofness in addition to air permeability. Moreover, the dustproof part 34b in the said embodiment may exhibit the function as a water stop member which prevents moisture, such as water, permeating into the fan accommodating part 34. FIG. In addition, the first and second cable glands 34c and 34d in the above-described embodiment also exert an effect of preventing water from entering the fan accommodating portion 34 from the screw hole formed in the bottom portion of the dust-proof portion 34b. It may be. In addition, the heat sink 37 in the above embodiment may function as a water stop member that prevents moisture such as water from entering the substrate 15 from the fan housing portion 34 side. Thereby, the lighting fixture by the said embodiment can be used conveniently in a hot and humid environment.

  In the said embodiment, although LED is used as a light emitting element, this invention is not limited to this. For example, even when a laser diode (semiconductor laser) or an organic EL (Electro-Luminescence) is used as the light emitting element, the same effect as the above embodiment can be obtained.

  In the above embodiment, the substrate 15 is provided with the plurality of LEDs 2, the plurality of resistance elements 6, and the plurality of capacitance elements 10a and 10b, but the present invention is not limited to this. The number of LEDs and the light emission intensity provided on the substrate 15 may be determined according to the use environment temperature or the like. For example, when the luminaire 1 is used in a severe usage situation due to a high environmental temperature, select a substrate with a small emission intensity per LED and a large number of LEDs used, and the environmental temperature will not increase. When the lighting fixture 1 is used in a non-harsh usage situation, a substrate having a high emission intensity per unit and a small number of mounted units may be selected. Thereby, it is possible to extend the life of the LED while ensuring the light emission amount per lighting fixture regardless of the usage environment of the lighting fixture.

  Moreover, about LED mounted in one board | substrate, by using LED of the same lot in the manufacture process of LED, the element dispersion | variation of LED in one board | substrate may be reduced, and it may be made not to provide a resistive element. Thereby, cost reduction of a lighting fixture can be achieved.

1 Lighting fixture 2, 21a-21h, 23a-23e LED
DESCRIPTION OF SYMBOLS 3 Light source part 3b Flat plate part 4 Resistance element 5 Power supply accommodating part 6a, 6b Connector 7 Connection part 8,37a, 51e, 700 Opening part 9,11,36a Power supply cable 9a, 9b, 11a, 11b Electric wire 9c, 11c Covering part 10a , 10b Capacitance element 12 Cable ground 13a, 13b Driving power supply circuit 15 Substrate 15a Substrate mounting surface 15b Central axis 17 Space 31 Heat radiation part 31a Outer fin 31b Inner fin 31c Hollow cylindrical part 31d Base part 31e Mounting part 32 Translucent protective part 32a Internal pressure adjusting part 33 Fall prevention part 33a Forked part 33b Flat plate part 33c, 510 Folding part 34 Fan housing part 34a Fan fixing part 34b Dustproof part 34c First cable gland 34d Second cable gland 35, 39 O-ring 36 Cooling fan 37 Heat sink 51 Boxes 51a and 51b Side 51 Locking receiving portion 51d Upper surface 51g, 52a Radiation port 51f Bottom surface 52 Lid 52b Locking portion 70 Space forming portion 70a Seat portion 70b Leg portion 71 End portion 72 Central portion 73 Branching portion 74 Fixing portion 131a, 131b Input terminals 133a, 133b Output terminals 135a, 135b, 343, 344 Screw receiving portions 151a, 151b, 151c, 151d, 151e, 151f, 151g, 151h Screw fixing portion 310 O-ring receiving portion 320 Light transmission region 321 Side wall 341 Inlet port 342 Ingress prevention portion 345 region 500 Center point 512 Power cable fixing part 730 Contact part 732 Branch part 741,742 Claw part H510, H511, H521, H701, H702, H703, H730, H734, H743 Through hole H512, H514 Screw hole N1, N2, N3 Nut S1 , S3, S7, 11, S13, S15, S16, S17, S18, S19, S20
Screw

  In order to solve the above-described problem, a lighting fixture according to an aspect of the present invention includes a substrate including a substrate mounting surface on which a plurality of light emitting elements are mounted, a cooling fan that sends cold toward the back side of the substrate, A through hole that is disposed between the substrate and the cooling fan and through which the cold passes, dissipates heat generated by the substrate, one surface that contacts the back side, and the one surface And a heat sink that is formed smaller than the substrate when viewed from the substrate mounting surface side and that conducts the cold heat passing through the through hole to the substrate. It is characterized by having.

  The heat sink and the substrate may have a circular shape, and the diameter of the heat sink may be shorter than the diameter of the substrate.

  The substrate may have a central portion in contact with the heat sink and an outer peripheral portion in contact with the heat dissipation portion.

  The heat sink may have a wiring through hole.

  The heat dissipation part may have fins on the surface on the cooling fan side.

  The through hole may extend toward the cooling fan, and the heat radiating portion may have a hollow cylindrical portion having a side wall of the through hole as an inner wall.

  A plurality of the fins may be formed in the circumferential direction of the hollow cylindrical portion so as to surround the hollow cylindrical portion.

  A fan housing portion that houses the cooling fan, wherein the fan housing portion includes an air inlet that sucks outside air into the fan housing portion, and an entrance that prevents a finger from entering the inside through the air inlet. You may have a prevention part.

The fan accommodating portion may be fixed to a part of the heat radiating portion.
The fan accommodating portion is fixed to an end of the hollow cylindrical portion on the side where the heat sink is not disposed, and a space corresponding to the length of the hollow cylindrical portion is provided between the fan accommodating portion and the heat sink. May be present.

Claims (1)

A light source unit including a plurality of light emitting elements mounted on the substrate mounting surface of the substrate;
Accommodates at least one drive power supply circuit that is arranged along the axial direction of the central axis of the substrate and does not protrude from the outer periphery of the light source unit when viewed from the substrate mounting surface side, and drives the light emitting element. A power storage unit
A connection part that provides a space between the power supply unit and the light source unit and connects the power supply unit to the light source unit;
The light source unit is provided on the back side of the substrate mounting surface, and has a heat radiating unit that radiates heat generated in the substrate,
The connecting portion has an arch shape in which both ends are formed in a bifurcated shape,
The heat radiating portion is formed with a plurality of fins provided so as to protrude in a direction opposite to the light emitting side,
Of the plurality of fins, a fin having a region formed wider than another region is attached to the both ends of the connecting portion in the region formed wide.

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