Lighting fixture and illuminating device

Abstract

To provide a lighting fixture and an illuminating device that enhance heat dissipation performance.SOLUTION: A lighting fixture comprises a base, a light source part attached to a lower surface of the base, and a power supply part arranged on an upper surface of the base. The base has a double structure comprising a main base, and an auxiliary base in which a first through hole is formed, and which is installed on an upper surface of the main base. The light source part is attached to a lower surface of the main base. The power supply part is arranged on an upper surface of the auxiliary base, and fixed to the main base by a first fixing tool via the first through hole of the auxiliary base. The auxiliary base is sandwiched between the power supply part and the main base.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure relates to a luminaire and a lighting device provided with a pedestal.

Background Art

[0002] A luminaire has a light source unit such as an LED (Light Emitting Diode) substrate, and is attached to a fixture to constitute a lighting device together with the fixture. In such a luminaire, a luminaire having a configuration in which an LED substrate and a power supply unit are arranged with a base plate (also referred to as a pedestal or a mounting member) interposed therebetween is known (see, for example, Patent Document 1). Since both the LED substrate and the power supply unit are heat generating parts in the luminaire, in the luminaire disclosed in Patent Document 1, the base plate functions as a heat dissipation means for the LED substrate and the power supply unit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the luminaire disclosed in Patent Document 1, the LED substrate is installed on the lower surface of the base plate (mounting member) composed of a single sheet of sheet metal, and the power supply unit is installed on the upper surface. Since it is necessary to dissipate heat from both the LED substrate and the power supply unit with this base plate, the heat dissipation performance is poor.

[0005] The present disclosure has been made to solve the above problems, and provides a luminaire and a lighting device with improved heat dissipation performance.

Means for Solving the Problems

[0006] The lighting fixture according to the present disclosure is a lighting fixture including a pedestal, a light source unit attached to the lower surface of the pedestal, and a power supply unit disposed on the upper surface of the pedestal. The pedestal has a double structure including a main pedestal and a sub-pedestal in which a first through hole is formed and which is installed on the upper surface of the main pedestal. The light source unit is attached to the lower surface of the main pedestal, the power supply unit is disposed on the upper surface of the sub-pedestal, and the sub-pedestal is fixed to the main pedestal by a first fixture through the first through hole of the sub-pedestal. The sub-pedestal is sandwiched between the power supply unit and the main pedestal.

[0007] Further, the lighting device according to the present disclosure includes the above-described lighting fixture, a fixture in which the lighting fixture is housed, and a connection mechanism provided between the fixture and the lighting fixture, attached to the fixture, and to which the lighting fixture is detachably connected. The connection mechanism is provided such that the lower end portion of the connection mechanism contacts the upper surface of the pedestal in a state where the lighting fixture is connected.

Advantages of the Invention

[0008] In the lighting fixture and the lighting device according to the present disclosure, the pedestal has a double structure including a main pedestal and a sub-pedestal in which a first through hole is formed and which is installed on the upper surface of the main pedestal, and the light source unit is attached to the lower surface of the main pedestal. The power supply unit is disposed on the upper surface of the sub-pedestal, fixed to the main pedestal by a first fixture through the first through hole of the sub-pedestal, and the sub-pedestal is sandwiched between the power supply unit and the main pedestal. Thereby, the heat capacity of the pedestal between the light source unit and the power supply unit can be increased, so that heat concentration on the main pedestal and the sub-pedestal is alleviated. As a result, it is possible to provide a lighting fixture and a lighting device with improved heat dissipation compared to the conventional configuration.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the lighting fixture and the lighting device according to the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited by the embodiments described below. Also, in the following drawings including FIG. 1, the relationship of the sizes of each component or each component part may be different from the actual ones. Further, in the following description, terms indicating directions are appropriately used for ease of understanding, but this is for the purpose of explanation and these terms do not limit the present disclosure. Examples of the terms indicating directions include "up", "down", "right", "left", "front", or "rear", etc.

[0011] Embodiment 1. FIG. 1 is an external perspective view showing the lighting device 1 according to Embodiment 1 from below. FIG. 2 is an exploded perspective view showing the lighting device 1 according to Embodiment 1. FIG. 3 is a perspective view showing from above a portion of the main part of the lighting device 1 of Embodiment 1 excluding the housing part 20. Based on FIGS. 1 to 3, the schematic configuration of the lighting device 1 will be described.

[0012] As shown in FIG. 1, the lighting device 1 is used by being attached to a support member 9 provided on an attachment part such as a ceiling. The support member 9 is, for example, a ceiling facility such as a bar member called a T-bar or a channel member. In Embodiment 1, a plurality of support members 9 are arranged in a grid pattern on the attachment part, and the lighting device 1 is fitted into a ceiling opening surrounded by four support members 9 arranged in a square shape. Thereby, a system ceiling CL (grid type system ceiling) is configured. Note that the lighting device 1 may be a lighting device installed other than the system ceiling CL (grid type system ceiling).

[0013] As shown in FIG. 2, the lighting device 1 includes a fixture 2 attached to a support member 9 (see FIG. 1), a connector 30 and an adjuster 40 as a connection mechanism 3, a first coupler 49 (e.g., a spring) fixed to the connection mechanism 3, and a luminaire 6. The luminaire 6 is a so-called light source unit. Further, the lighting device 1 includes a light-shielding member 29 disposed on the light irradiation side of the luminaire 6 for changing the irradiation direction of the lighting device 1, and an equipment plate 8 (see FIG. 1) covering an equipment arrangement portion 28 provided in the fixture 2.

[0014] In FIG. 2, in the lighting device 1 shown in FIG. 1, a state is illustrated in which the equipment plate 8 is removed to expose the internal equipment arrangement portion 28 and the portion on the right side of the equipment arrangement portion 28 is disassembled. In FIG. 2, the lighting device 1 according to the first embodiment includes a fixture 2 having two housing portions 20, two luminaires 6 housed in each housing portion 20, a connection mechanism 3 interposed between the fixture 2 and each luminaire 6, and two first couplers 49 fixed to each connection mechanism 3. The connection mechanism 3 is attached to the fixture 2 and the luminaire 6 is detachably connected thereto. In FIG. 2, the connection mechanism 3 is composed of a connector 30 and a pair of adjusters 40. The first coupler 49 provided on the connector 30 and a second coupler 65 (see FIG. 5 described later) provided on the luminaire 6 constitute a connection mechanism between the connection mechanism 3 and the luminaire 6. For example, the first coupler 49 is a spring and the second coupler 65 is a spring receiver. The light-shielding member 29 is, for example, a louver in which a plurality of long members are arranged in parallel and is disposed below the light of each luminaire 6. In FIG. 2, the light-shielding member 29 on the right side is not shown. As shown in FIG. 1, the equipment plate 8 covers the equipment arrangement portion 28 provided between the two housing portions 20 in the fixture 2 from below. Further, an electric wire 7 (see FIG. 5 described later) is disposed in the lighting device 1.

[0015] Note that the configuration of the lighting device 1 is not limited to the above configuration. For example, the fixture 2 may not be a component of the lighting device 1, and a configuration may be adopted in which the lighting device 1 including the connector 30 and the lamp unit 6 is attached to an existing facility fixture. Further, for example, the light-shielding member 29 and the equipment plate 8 may be omitted. Further, for example, in FIG. 2, the lighting device 1 includes two lamp units 6, and includes the same number of housing portions 20, connectors 30, and light-shielding members 29 as the lamp units 6, but the number of the lamp units 6, housing portions 20, connectors 30, and light-shielding members 29 may be a single number or three or more. Further, for example, the light-shielding member 29 may have a structure other than a louver. Further, for example, in the coupling mechanism, the first coupling member 49 provided on the connector 30 may be a spring receiver and the second coupling member 65 provided on the lamp unit 6 may be a spring. Further, the coupling mechanism may be any configuration as long as it couples the connector 30 and the lamp unit 6, and is not limited to a combination of a spring and a spring receiver. Further, for each lamp unit 6, one set or three or more sets of coupling mechanisms for coupling the connector 30 and the lamp unit 6 may be provided. Further, when a plurality of sets of coupling mechanisms are provided, different types of coupling mechanisms may be used.

[0016] Based on FIGS. 1 to 3, the configuration of the fixture 2, the connection mechanism 3, and the first coupling member 49 of the lighting device 1 will be described. Hereinafter, the main part of the lighting device 1 is a structural part that takes the housing portion 20 and a pair of adjusters 40, a connector 30, a lamp unit 6, and a light-shielding member 29 attached to the housing portion 20 as one unit. Hereinafter, the lamp unit 6 and the connector 30 accommodated in the left housing portion 20 may be distinguished from the lamp unit 6 and the connector 30 accommodated in the right housing portion 20 and may be referred to as the lamp unit 6x and the connector 30x.

[0017] (Fixture 2) As shown in FIG. 2, the appliance 2 has the same size as the ceiling opening of the system ceiling CL (see FIG. 1) and has a frame-shaped outer contour. Specifically, the appliance 2 has two side portions 21 that form the left and right side surfaces, two lid portions 25 that form the front and rear side surfaces, and two top portions 22 that form the upper surfaces on the left and right sides, respectively. Further, the appliance 2 has two partition plates 23 that face each other between the two side portions 21. That is, in the left and right portions of the appliance 2, a housing portion 20 is formed by the side portion 21, the partition plate 23, and the top portion 22 that connects the upper ends thereof. The front ends of the two housing portions 20 are covered by the front lid portion 25, and the rear ends of the two housing portions 20 are covered by the rear lid portion 25. Hereinafter, the side portion 21 and the partition plate 23 of the housing portion 20 may not be distinguished from each other and may be referred to as side portion 210, respectively.

[0018] The side portion 21 is a rectangular plate-shaped member extending in the front-rear direction (arrow Y direction). The two side portions 21 are arranged at positions facing each other. The lid portion 25 is a plate-shaped member extending in the lateral direction (arrow X direction). The two lid portions 25 are also arranged at positions facing each other. A rectangular frame is formed by the two side portions 21 and the two lid portions 25. The lid portion 25 is provided with an appliance fixture 26 for fixing the appliance 2. The appliance fixture 26 is, for example, a mounting bracket that is screwed to the lid portion 25 of the appliance 2 and has a claw formed at the tip that is hooked on the support member 9 (see FIG. 1).

[0019] In the front-rear direction (arrow Y direction), the two partition plates 23 have the same length as the side portion 21 and partition the interior of the rectangular frame formed by the two side portions 21 and the two lid portions 25 into three spaces in the lateral direction (arrow X direction). The spaces on both end sides, that is, the spaces within each housing portion 20, are lighting fixture arrangement portions 27. Lighting fixtures 6 and the like are accommodated in the lighting fixture arrangement portions 27. Equipment arrangement portions 28 provided between the two lighting fixture arrangement portions 27 accommodate equipment (not shown) such as a speaker or an emergency light.

[0020] The top surface portion 22 is a rectangular plate-shaped member extending in the front-rear direction (the direction of arrow Y). The left top surface portion 22 connects the upper ends of the left opposing side surface portions 210 (side surface portions 21 and partition plate 23) in the lateral direction (the direction of arrow X), and connects the upper ends of the left portions of the two lid portions 25 in the front-rear direction (the direction of arrow Y). The right top surface portion 22 connects the upper ends of the right opposing side surface portions 210 in the lateral direction (the direction of arrow X), and connects the upper ends of the right portions of the two lid portions 25 in the front-rear direction (the direction of arrow Y).

[0021] An opening 22o for air-conditioning return is formed in the top surface portion 22, and the lighting device 1 is configured to satisfy a predetermined air-conditioning return specification. Further, a connection mechanism attachment portion 24 for supporting the adjuster 40 is provided on the top surface portion 22.

[0022] In FIG. 2, the connection mechanism attachment portions 24 are provided at the front end portion and the rear end portion of the top surface portion 22 of each housing portion 20, respectively. The connection mechanism attachment portions 24 are provided so as to protrude downward from the top surface portion 22 of the housing portion 20, and are formed, for example, by cutting and raising a part of the top surface portion 22 downward. The two front and rear connection mechanism attachment portions 24 provided on the top surface portion 22 extend downward from the top surface portion 22, and then have an L shape extending substantially horizontally inward in the front-rear direction (the direction of arrow Y). A screw hole 241 to which a fixture 51 for fixing the adjuster 40 to the connection mechanism attachment portion 24 is screwed is provided on the lower horizontal surface of the connection mechanism attachment portion 24.

[0023] (Connection mechanism 3) The connector 30 and the adjuster 40 attached to the connector 30 are a connection mechanism 3 for attaching the lighting fixture 6 to the appliance 2. In other words, the connection mechanism 3 connects a first coupler 49 for coupling to the second coupler 65 on the lighting fixture 6 side to the appliance 2. The connector 30 has an elongated shape extending in the front-rear direction (the direction of arrow Y), and is housed in the lighting fixture arrangement portion 27 of the appliance 2 in a state of being fixed to the appliance 2.

[0024] As shown in FIG. 3, the connector 30 is configured such that a cross-section with the front-rear direction (arrow Y direction) as the normal direction has an upwardly convex shape so as to form a space portion SP (see FIG. 12 described later) in which a power supply unit 66 (see FIG. 5 described later) and the like are arranged between the upper surface of the pedestal 60 of the lamp fixture 6.

[0025] As shown in FIGS. 2 and 3, the connector 30 has a connector main body 31 that faces the top surface 22 of the appliance 2 when attached to the appliance 2, and a pair of connector side portions 32 arranged on both sides of the connector main body 31 along the longitudinal direction of the connector main body 31. Each of the connector main body 31 and the pair of connector side portions 32 has a substantially flat plate shape. The connector 30 has a concave shape with the lower ends of the pair of connector side portions 32 open. The pair of connector side portions 32 are inclined so as to gradually narrow from the lower end toward the upper end (side of the connector main body 31).

[0026] In the lateral direction (arrow X direction), the width of the lower end of the connector 30 is approximately the same as the width of the cover 64 of the lamp fixture 6. The lower ends on both sides of the connector 30, that is, the lower ends of the pair of connector side portions 32, are in contact with the upper surface of the pedestal 60 of the lamp fixture 6 when the connector 30 and the lamp fixture 6 are attached to the appliance 2.

[0027] A terminal block 47 is provided on the connector 30. In FIG. 3, the terminal block 47 is provided so as to penetrate the connector 30 on the front side of the center of the connector 30 extending in the front-rear direction (arrow Y direction). Specifically, the terminal block 47 is fixed to the connector main body 31 by a fixture 53 such as a screw so that a part of the terminal block 47 is exposed from a terminal block installation hole 37 formed in the upper part of the right connector side portion 32. The terminal block 47 connects the external power supply S (see FIG. 14 described later) and the power supply unit 66 (see FIG. 5 described later).

[0028] In addition, a wiring hole 38 through which an end portion of an inter-lamp power supply line 721 (see FIG. 14 described later) passes is formed in the connector 30. In FIG. 3, the wiring hole 38 is formed on the rear side of the right connector side portion 32. A protector 48 for protecting the inter-lamp power supply line 721 is provided at the peripheral portion of the wiring hole 38 in the connector 30.

[0029] Here, the power supply wire 721 between the luminaires (see FIG. 14 described later) is the power supply wire 72 that connects between the luminaires 6 and 6x among the wires 7, and is arranged, for example, along the inside of the lid portion 25. Along the inside of the upper part of the rear lid portion 25 shown in FIG. 2, the power supply wire 721 between the luminaires is wired from inside the right housing portion 20 through the equipment arrangement portion 28 into the left housing portion 20, and each end is arranged inside a connector 30 arranged in each housing portion 20.

[0030] As shown in FIGS. 2 and 3, the adjuster 40 connects the connector 30 to the top surface portion 22 of the appliance 2 and forms a gap G2 (see FIG. 12 described later) between the top surface portion 22 and the upper surface of the connector 30. In FIG. 2, the adjusters 40 are arranged in the front portion and the rear portion of each housing portion 20, respectively.

[0031] In FIGS. 2 and 3, each adjuster 40 has a two-stage stepped shape having two horizontal planes 41 and 42. In a pair of adjusters 40, the first-stage horizontal plane 41 is attached to a connection mechanism attachment portion 24 protruding downward from the top surface portion 22 of the housing portion 20 by a fixture 51 such as a screw. The pair of adjusters 40 are attached to the connection mechanism attachment portion 24 such that the first-stage horizontal plane 41 among the two horizontal planes 41 and 42 is located outside in the front-rear direction (arrow Y direction). Also, on the second-stage horizontal plane 42 of the pair of adjusters 40, the main connector portion 31 at the upper part of the connector 30 is attached by a fixture 54 such as a screw.

[0032] (First connector 49) As shown in FIG. 2, the first connector 49 is fixed to the connector 30 using a fixture 50 such as a screw. The first connector 49 is a longitudinally shaped spring formed of an elastic material such as stainless steel or spring steel plate. The first connector 49 is configured to be connectable without tools such as a driver by engaging with a second connector 65 (see FIG. 5 described later) provided on the luminaire 6.

[0033] In the example of FIG. 2, two first connectors 49 are provided for one connector 30 extending in the front-rear direction. One of the first connectors 49 is fixed to the front side portion of the connector 30 (in FIG. 3, the front side portion of the main body 31 of the connector), and the other first connector 49 is fixed to the rear side portion of the connector 30 (in FIG. 3, the rear side portion of the main body 31 of the connector). The first connector 49 is fixed to the connector 30 such that its longitudinal direction is the longitudinal direction (front-rear direction) of the connector 30. A fixing portion by the fixture 50 is arranged on the central side in the longitudinal direction of the connector 30, and an engaging portion with the second connector 65 is arranged on the end side in the longitudinal direction of the connector 30.

[0034] By the connecting mechanism, the lighting fixture 6 can take a state of temporary attachment with respect to the connecting mechanism 3 to form a space for wiring between the connector 30 and the lighting fixture 6 so that an operator can easily perform wiring, and a state of completed attachment in which the lower end of the connector 30 contacts the pedestal 60 of the lighting fixture 6.

[0035] FIG. 4 is an enlarged perspective view showing the lighting fixture 6 of FIG. 2. In FIG. 4, the structure inside the cover 64 is shown for a part of the lighting fixture 6. FIG. 5 is a perspective view of the lighting fixture 6 of FIG. 4 as viewed from above. FIG. 6 is an exploded perspective view showing the lighting fixture 6 of FIG. 5. FIG. 7 is a perspective view of the sub-pedestal 62 of FIG. 6 as viewed from above. FIG. 8 is a perspective view of the sub-pedestal 62 of FIG. 7 as viewed from below. FIG. 9 is a schematic cross-sectional view showing the lighting fixture 6 of FIG. 4. FIG. 10 is an exploded perspective view showing the state before assembling the lower structure and the sub-pedestal 62 in the lighting fixture 6 of FIG. 4. FIG. 11 is an exploded perspective view showing the state before installing each device on the upper surface of the pedestal 60 in the lighting fixture 6 of FIG. 4. Hereinafter, the configuration of the lighting fixture 6 will be described with reference to FIGS. 2 to 11.

[0036] (Lighting Fixture 6) As shown in FIG. 2, the lighting fixture 6 is a light source unit that irradiates light to an irradiation target area by the power supplied from an external power source S (see FIG. 14 described later). The lighting fixture 6 has an elongated shape extending in the front-rear direction (arrow Y direction), and is housed in the lighting fixture arrangement portion 27 of the fixture 2 together with a pair of adjusters 40 and a connector 30.

[0037] As shown in FIGS. 4 and 5, the lighting fixture 6 includes a pedestal 60 which is a base plate, a light source unit 63 and a power supply unit 66 installed on the pedestal 60, a cover 64 which transmits light and covers the light source unit 63, a pair of second connectors 65, etc.

[0038] (Second Connector 65) As shown in FIG. 5, the second connector 65 is disposed on the upper surface of the pedestal 60 and constitutes a connecting mechanism that detachably connects the connecting mechanism 3 and the lighting fixture 6 together with a first connector 49 (see FIG. 2) fixed to the connector 30. A connector opening 651 into which the first connector 49 (spring) is inserted is formed in the second connector 65 (spring receiver). Further, as shown in FIG. 6, the second connector 65 is provided with connector locking portions 652 that protrude outward at both ends in the lateral direction (arrow X direction).

[0039] (Light Source Unit 63) As shown in FIG. 4, the light source unit 63 is, for example, a light source 630 that emits light, such as LEDs (Light Emitting Diodes), arranged in the longitudinal direction and mounted on a substrate 631, and is attached to the lower surface of the pedestal 60. Note that the light source 630 is not limited to an LED, and may be a semiconductor laser, an organic EL (Electro Luminescence), an inorganic EL, or the like.

[0040] (Power Supply Unit 66) As shown in FIGS. 5 and 6, the power supply unit 66 has a front end portion 661 of its lower part (for example, a chassis) fixed to the pedestal 60 and is disposed on the upper surface of the pedestal 60. The power supply unit 66 converts the electric power supplied from an external power supply S (see FIG. 14 described later) for supply to each device. The power supply unit 66 lights, for example, the light source unit 63.

[0041] From the power supply unit 66, a luminaire-side power supply line 710, which is a part of the power supply line 71, extends. The luminaire-side power supply line 710 is connected to a terminal-side power supply line 711 (see FIG. 14 described later) that extends from a terminal block 47 installed in the connector 30 during the assembly of the lighting device 1 (for example, during new construction or renovation construction). The terminal-side power supply line 711 is a part of the power supply line 71 and extends from a portion disposed inside the connector 30 in the terminal block 47 shown in FIG. 3. Here, the renovation construction is a construction in which the appliance 2 is continuously used while installed and the luminaire 6 is replaced. Since the terminal block 47 is provided in the front-side portion of the connector 30 in FIG. 2, in FIG. 5, the luminaire-side power supply line 710 is configured to extend from the front end of the power supply unit 66.

[0042] Also, although not shown in FIG. 5, a power supply line 720 inside the luminaire (see FIG. 14 described later) connects the power supply unit 66 and the light source unit 63 via the rear end of the pedestal 60.

[0043] (Pedestal 60) As shown in FIG. 2, the pedestal 60 has an elongated shape extending in the front-rear direction (arrow Y direction) and is provided parallel to the top surface 22 of the housing portion 20 in a state where the luminaire 6 is attached to the appliance 2 (housing portion 20) via the connector 30 or the like. Specifically, the pedestal 60 has a rectangular shape and is arranged such that the long side is along the front-rear direction (arrow Y direction) and the short side is along the lateral direction (arrow X direction).

[0044] As shown in FIGS. 4 to 6, the pedestal 60 has a double structure including a main pedestal 61 on which the light source unit 63 is installed on the lower surface and a sub-pedestal 62 disposed on the upper surface of the main pedestal 61 on which the power supply unit 66 and the like are placed. The main pedestal 61 and the sub-pedestal 62 each have a substantially rectangular shape extending in the front-rear direction (arrow Y direction) and are made of, for example, a sheet metal material. The substrate 631 of the light source unit 63 is fixed to the main pedestal 61 by, for example, an adhesive or the like.

[0045] As shown in FIG. 6, the main pedestal 61 has a rectangular plate-shaped first main portion 610 extending in the front-rear direction (arrow Y direction), and a pair of first side portions 615 extending upward provided at the edge portions on both sides in the lateral direction (arrow X direction) of the first main portion 610. A cover 64 covering the light source portion 63 is engaged with the pair of first side portions 615 of the main pedestal 61.

[0046] As shown in FIG. 6, the sub-pedestal 62 has a rectangular shape with a width larger than the width of the main pedestal 61. The sub-pedestal 62 has a second main portion 620 constituting the central portion in the lateral direction (arrow X direction), a pair of overhanging portions 628 constituting the left side portion and the right side portion, and a pair of second side portions 625 provided so as to protrude upward between the second main portion 620 and each overhanging portion 628.

[0047] The second side portion 625 is formed, for example, by bending a portion between the second main portion 620 and each overhanging portion 628 in a sheet metal material constituting the sub-pedestal 62 so that the cross-sectional shape is downward U-shaped (in other words, downward gutter-shaped), and a concave portion 625r is formed on the lower surface side of the second side portion 625. The main pedestal 61 and the sub-pedestal 62 are arranged such that the lower surface of the second main portion 620 contacts the upper surface of the first main portion 610, and the first side portion 615 is accommodated in the concave portion 625r formed on the lower surface side of each second side portion 625. Since the sub-pedestal 62 is provided with the second side portion 625 having a gutter-shaped cross-sectional shape, the rigidity is improved, and a configuration in which deformation such as warping or twisting hardly occurs is achieved.

[0048] Also, as shown in FIG. 2, in a state where the lamp 6 is installed in the housing portion 20 via the connector 30 or the like, the pedestal 60 and the connector 30 are arranged such that a pair of connector side portions 32 (see FIG. 3) of the connector 30 contact a pair of second side portions 625 (see FIG. 5) of the sub-pedestal 62. For example, the lower end portions of the pair of connector side portions 32 are configured to contact the upper end surfaces of the pair of second side portions 625 of the sub-pedestal 62.

[0049] As described above, a space portion SP (see FIG. 12 to be described later) where a power supply unit 66 or the like is disposed is formed between the pedestal 60 of the lighting fixture 6 shown in FIG. 5 (particularly, the second main portion 620 and the pair of second side portions 625 in the sub-pedestal 62) and the connector 30 shown in FIG. 3. And both end portions in the front-rear direction (arrow Y direction) of this space portion SP are blocked by a pair of adjusters 40 as shown in FIG. 3.

[0050] Note that the arrangement of the pedestal 60 and the connector 30 is not limited to the above arrangement. For example, the lower end portions of the pair of connector side portions 32 may be arranged outside the pair of second side portions 625 such that the inner surfaces of the pair of connector side portions 32 contact the second side portions 625. Further, for example, a configuration in which the lower end portions of the pair of connector side portions 32 contact the upper surface of the overhanging portion 628 of the pedestal 60 may also be used. As described above, it is preferable that the pedestal 60 and the connector 30 are arranged so as to form the space portion SP, but the lower end portion of the connector 30 and the pedestal 60 may not be in contact with each other.

[0051] As shown in FIGS. 5 and 6, on the upper surface of the second main portion 620 of the sub-pedestal 62, live parts of the lighting fixture 6 such as the power supply unit 66 and the electric wire 7 are arranged. Also, on the upper surface of the second main portion 620, a second coupler 65 that engages with a first coupler 49 (see FIG. 2) fixed to the connector 30 is arranged.

[0052] The first main portion 610 and the second main portion 620 are configured to engage with each other. Although details will be described later, the sub-pedestal 62 is configured so as not to be detached from the main pedestal 61 in a state where the second coupler 65 and the power supply unit 66 are attached to the pedestal 60. Hereinafter, the first main portion 610 and the second main portion 620 that constitute the central portion in the lateral direction (arrow X direction) of the pedestal 60 may be referred to as the pedestal main portion 600. In FIG. 6, second couplers 65 are fixed to the front side portion and the rear side portion of the pedestal main portion 600 by fixing tools 56 such as screws, for example.

[0053] The pair of overhanging portions 628 of the sub pedestal 62 extend beyond the ends on both sides in the lateral direction (arrow X direction) of the main pedestal 61 to which the cover 64 is attached. As a result, when the luminaire 6 is viewed from below, the overhanging portions 628 protruding outside the cover 64 make it difficult to see the upper structures of the pedestal 60, such as the main pedestal 61 and the power supply unit 66 disposed above it. The shape and size of the overhanging portion 628 are determined so as to ensure a sufficient air return path within the housing portion 20 shown in FIG. 2 and to be able to cover the opening 22o for air conditioning return provided in the top surface portion 22.

[0054] Also, bent portions (not shown) bent upward are formed at the outer edges in the lateral direction (arrow X direction) of the pair of overhanging portions 628, that is, at the edges on both sides in the lateral direction (arrow X direction) of the pedestal 60, so that the operator can work safely.

[0055] Further, the lighting device 1 may be configured to include a control device (not shown) that receives a control command from the outside and controls the output of the power supply unit 66 based on the control command. In this case, the control device may be installed, for example, on the upper surface of the overhanging portion 628 of the pedestal 60.

[0056] As shown in FIG. 6, a notch 601 for passing a luminaire internal power supply line 720 (see FIG. 14 described later) for connecting the power supply unit 66 and the light source unit 63 is provided at the rear end of the pedestal main body 600 of the pedestal 60. Further, the luminaire 6 is provided with a power supply line holder 67 that is attached to the notch 601 of the pedestal main body 600 and holds the luminaire internal power supply line 720 between the pedestal main body 600.

[0057] Note that the wiring path of the luminaire internal power supply line 720 is not limited to the above configuration. For example, instead of providing the power supply line holder 67, holes penetrating the main pedestal 61 and the sub pedestal 62 may be provided in the pedestal 60.

[0058] Here, the structures of the first main part 610 of the main pedestal 61 and the second main part 620 of the sub-pedestal 62 will be described in detail. As shown in FIGS. 6 and 10, a pedestal locking part 611 is formed on the first main part 610 to which the light source part 63 is attached, and a pedestal locking part 621 that engages with the pedestal locking part 611 is formed on the second main part 620 on which the power supply part 66 is placed. The pedestal locking part 611 and the pedestal locking part 621 are, for example, such that the pedestal locking part 611 is a claw that protrudes upward from the first main part 610 and bends forward, and the pedestal locking part 621 is a hole formed in the second main part 620. The pedestal locking part 611 is formed, for example, by cutting and raising a part of the first main part 610. Note that the pedestal locking part 611 and the pedestal locking part 621 only need to be configured to engage with each other, and are not limited to the above configuration. By engaging the pedestal locking part 611 and the pedestal locking part 621 with each other, the sub-pedestal 62 is temporarily held with respect to the main pedestal 61.

[0059] Also, as shown in FIGS. 10 and 11, a power supply part locking part 623 that engages with the power supply part 66 is formed on the second main part 620. The power supply part locking part 623 is, for example, a claw that protrudes upward from the second main part 620 and bends forward, and is hooked on the rear end part of the lower part (for example, the chassis) of the power supply part 66. The power supply part locking part 623 is formed, for example, by cutting and raising a part of the second main part 620. Note that the second main part 620 only needs to be configured to engage with the power supply part 66, and is not limited to the above configuration. By engaging the power supply part 66 with the power supply part locking part 623 of the second main part 620, the power supply part 66 is temporarily held with respect to the sub-pedestal 62.

[0060] The power supply unit 66 is fixed to the pedestal main body 600 by the fixture 55. On the upper surface of the first main body 610, the screw 55a of the fixture 55 with a pedestal is installed such that the screw portion protrudes upward. Further, in the second main body 620, a mounting portion through hole 622a through which the screw 55a with a pedestal is disposed is formed. The power supply unit 66 is fixed to the pedestal main body 600 by attaching a nut 55b to the screw 55a with a pedestal of the first main body 610 through the mounting portion through hole 622a of the second main body 620 and the front end portion 661 at the lower part of the power supply unit 66. Note that the method of fixing the power supply unit 66 to the pedestal main body 600 is not limited to the method using the above-described fixture 55.

[0061] Further, the first main body 610 is provided with a mounting portion 612 of the second coupler 65. In the mounting portion 612, a screw hole 613 to which a fixture 56 for fixing the second coupler 65 is screwed is formed. The mounting portion 612 is configured such that the upper surface side of the first main body 610 bulges by means of embossing or the like. Further, in the second main body 620, a mounting portion through hole 622b in which the mounting portion 612 of the first main body 610 is disposed is formed. In FIG. 11, mounting portions 612 are formed in the front side portion and the rear side portion of the first main body 610, and mounting portion through holes 622b are formed in the front side portion and the rear side portion of the second main body 620. The mounting portion 612 has a circular shape, and the mounting portion through hole 622b has an oval shape extending in the front-rear direction (arrow Y direction).

[0062] Also, as shown in FIGS. 7 to 9, a protruding portion 627 that protrudes inward (i.e., toward the side of the second main portion 620) is formed on the second side portion 625 of the sub pedestal 62. A configuration is provided such that an electric wire 7 disposed on the pedestal 60 can be held in a space surrounded by the protruding portion 627, the power supply unit 66, and the second main portion 620 (hereinafter also referred to as a wire holding portion). Examples of the electric wire 7 held by the protruding portion 627 include a control wire 73 for transmitting a control signal for instructing the supply of lighting power from outside the lamp 6 to the power supply unit 66, or a power supply wire 72 for supplying lighting power from the power supply unit 66 to the light source unit 63. The protruding portion 627 has, for example, a frustum shape. In FIG. 9, the protruding portion 627 is provided only on the right second side portion 625 of the pair of second side portions 625, but it may be provided only on the left second side portion 625, or may be provided on both second side portions 625.

[0063] Specifically, as shown in FIG. 7, the protruding portion 627 is preferably provided such that the conductor diameter dimension D1 of the electric wire 7, the outer diameter dimension D2 of the electric wire 7 including the coating, and the distance dimension L1 between the tip of the protruding portion 627 of the second side portion 625 and the power supply unit 66 satisfy the relationship D1 < L1 ≤ D2.

[0064] Also, as shown in FIGS. 7 and 8, slit-shaped second coupler locking holes 626 extending in the front-rear direction (arrow Y direction) are formed in the inner walls of the pair of second side portions 625 of the sub pedestal 62. A coupler locking portion 652 (for example, a claw) of the second coupler 65 is inserted into the second coupler locking hole 626.

[0065] (Cover 64) As shown in FIG. 9, the cover 64 is attached to the pedestal 60 and covers the light source unit 63. The cover 64 is, for example, a resin member that diffuses the light emitted from the light source unit 63. As shown in FIG. 6, the cover 64 has a light-transmissive cover main body portion 640 that extends in the longitudinal direction (front-rear direction) of the lamp 6 and covers the entire lower surface of the light source unit 63, and cover end portions 645 that are provided on both the front and rear sides of the cover main body portion 640 and serve as lids for the cover main body portion 640.

[0066] As shown in Fig. 9, the cover main body 640 has a light-transmitting portion 641 whose cross-sectional shape with its longitudinal direction (front-rear direction) as the normal direction is convex downward (e.g., curved), and a pair of cover locking portions 642 provided so as to protrude upward at both ends in the short direction (lateral direction) of the light-transmitting portion 641 and hooked on the pedestal 60. The pair of cover locking portions 642 of the cover main body 640 are, for example, in the shape of a curved claw on the inner side. In Fig. 9, when the cover 64 is attached to the pedestal 60, the cover locking portion 642 is inserted into a recess 625r formed on the lower surface side of the second side portion 625 of the sub-pedestal 62 and hooked on the first side portion 615 of the main pedestal 61. That is, the cover 64 is attached to the pedestal 60 such that the cover main body 640 holds the main pedestal 61 from both sides in the lateral direction (arrow X direction).

[0067] As shown in Fig. 9, in a state where the sub-pedestal 62 is integrated as the lamp 6, each second side portion 625 is arranged to cover the first side portion 615 and the portion of the cover locking portion 642 engaged with the first side portion 615. Therefore, in a state where the sub-pedestal 62, the main pedestal 61, the power supply unit 66, etc. are assembled, the cover 64 cannot be removed even if an operator or a user tries to remove it intentionally, and dropping can be prevented. Note that an engaging portion that engages with the cover locking portion 642 may be provided on, for example, the second side portion 625 of the sub-pedestal 62 to more reliably prevent dropping.

[0068] Next, the assembly procedure of the lamp 6 will be described. As shown in Fig. 10, an operator first attaches the light source unit 63 to the lower surface of the main pedestal 61 shown in Fig. 6, attaches the cover 64 to the main pedestal 61 so as to cover the light source unit 63, and attaches the screw 55a with a pedestal to the upper surface of the main pedestal 61. These structures are referred to as the lower structure of the lamp 6.

[0069] As shown in FIG. 10, after the operator assembles the lower structure of the lighting fixture 6, the operator places the sub-base 62 on the main base 61 so that the base locking portion 611 (claw) of the main base 61 passes through the base locking portion 621 (hole) of the sub-base 62, and slides it in one direction (rearward in FIG. 10) in the longitudinal direction (arrow Y direction). As a result, the base locking portion 611 (claw) catches on the edge of the base locking portion 621 (hole), and the sub-base 62 is temporarily held with respect to the lower structure including the main base 61.

[0070] When the sub-base 62 is placed on and slid on the main base 61, the pedestal screw 55a on the first main portion 610 passes through the mounting portion through-hole 622a of the second main portion 620 and relatively moves within the mounting portion through-hole 622a. Further, when the sub-base 62 is placed on and slid on the main base 61, each mounting portion 612 of the first main portion 610 passes through the mounting portion through-hole 622b of the second main portion 620 and relatively moves within the mounting portion through-hole 622b. Therefore, since the pedestal screw 55a and each mounting portion 612 do not hinder the assembly of the lower structure and the sub-base 62, the sub-base 62 can be placed on the main base 61 and slid so that the lower surface of the second main portion 620 contacts the upper surface of the first main portion 610.

[0071] Next, as shown in FIG. 11, with the sub-base 62 temporarily held with respect to the lower structure including the main base 61, the operator arranges and attaches the second coupler 65 (spring receiver) and the power supply unit 66 on the upper surface of the base main portion 600.

[0072] Specifically, the operator inserts the coupler locking portions 652 at both ends of the second coupler 65 into the second coupler locking holes 626 provided on the inner walls of a pair of second side portions 625 of the sub-base 62, and slides it in one direction in the front-rear direction (arrow Y direction). In this state, the second coupler 65 is fixed to the base 60 by being screwed into the screw hole 613 formed in the mounting portion 612 of the main base 61 through the mounting portion through-hole 622b of the sub-base 62 by the fixture 56.

[0073] Also, the operator places the power supply unit 66 on the sub-base 62 such that the threaded portion of the pedestal screw 55a of the main base 61 protruding through the mounting portion through-hole 622b of the sub-base 62 is inserted into a screw insertion hole (not shown) provided at the front end portion 661 at the lower part of the power supply unit 66. Then, the operator slides the power supply unit 66 in one direction in the front-rear direction (in FIG. 11, rearward). As a result, the rear end portion at the lower part of the power supply unit 66 engages with a power supply unit locking portion 623 formed in the second main portion 620. In this state, by attaching a nut 55b to the tip of the pedestal screw 55a, the power supply unit 66 is fixed to the main base 61 via the sub-base 62 by the fixture 55.

[0074] As described above, with the sub-base 62 temporarily held with respect to the lower structure including the main base 61, that is, with the sub-base 62 positioned with respect to the main base 61, by fixing the power supply unit 66 and the like to the main base 61 via the sub-base 62, the main base 61 and the sub-base 62 are connected.

[0075] FIG. 12 is a schematic cross-sectional view showing a main part of the lighting device 1 of Embodiment 1. In FIG. 12, it is assumed that the lighting device 1 is a lighting device corresponding to an air-conditioning return specification. Along with the operation of the air-conditioning equipment, the air in the lighting space SL of the lighting device 1 flows from the lower part of the housing portion 20 into the lamp arrangement portion 27, rises toward an opening 22o formed in the top surface portion 22 of the housing portion 20, and flows out above the system ceiling CL through the opening 22o. Based on FIG. 12, while referring to FIGS. 1 to 3, the configuration for air-conditioning return in the lighting device 1 will be described.

[0076] As shown in FIG. 12, the width WL of the lamp 6, that is, the width of the sub-base 62 of the pedestal 60, is such that the width of the overhanging portion 628 of the sub-base 62 is predetermined to be smaller than the width WC of the lamp arrangement portion 27 which is the space inside the housing portion 20, that is, the distance between the side surface portions 210 in the housing portion 20. That is, a gap G1 is formed between the lamp 6 and the housing portion 20 in the lateral direction (arrow X direction).

[0077] In addition, the lateral width of the protruding portion 628 is preferably such that the terminal block 47 protruding from the opening 22o for air-conditioning return and the connector 30 is hidden by the sub-base 62. Specifically, as shown in FIG. 12, inside the extension line of the straight line indicated by the two-dot chain line connecting the opening end of the housing portion 20 and the end portion of the sub-base 62 in the lateral direction (arrow X direction), the opening 22o for air-conditioning return and the terminal block 47 on the top surface portion 22 are provided so as to fit. As a result, the opening 22o and the terminal block 47 on the top surface portion 22 cannot be visually recognized by the user, and the design property is improved.

[0078] In addition, as shown in FIG. 12, a gap G2 is also formed between the connector 30 covering the upper portion of the lighting fixture 6 and the top surface portion 22 of the housing portion 20. This gap G2 is formed by the adjuster 40 shown in FIG. 2 and the connection mechanism attachment portion 24 of the housing portion 20. Further, as shown in FIG. 12, the opening 22o for air-conditioning return formed in the top surface portion 22 of the housing portion 20 is provided such that at least a part of the opening 22o protrudes laterally (arrow X direction) from the main connector portion 31 in plan view.

[0079] By providing the gap G2 and the opening 22o as described above, it is difficult for a pressure difference to occur above and below the suspended ceiling CL (see FIG. 1), and the lighting device 1 can be used safely. Further, since the space portion SP where the energized portions of the lighting fixture 6 and the like are arranged is covered by the connection mechanism 3 such as the connector 30 and the pair of adjusters 40 (see FIG. 2), even if foreign matter floating in the lighting space SL flows into the lighting fixture arrangement portion 27 together with air, it is suppressed from adhering to the energized portion.

[0080] In addition, as described with reference to FIG. 3, the connector 30 has a concave shape in which the lower ends of the pair of connector side portions 32 are open, and the pair of connector side portions 32 are inclined so as to gradually narrow from the lower end toward the upper end (toward the main connector portion 31). With such a configuration, a sufficient air return path can be ensured.

[0081] Next, based on FIGS. 9 and 12, while referring to FIG. 3, the function of the pedestal 60 in the lighting fixture 6 will be described. Both the light source unit 63 and the power supply unit 66 are heat sources and generate operating heat. The pedestal 60 on which these heat sources, the light source unit 63 and the power supply unit 66, are installed functions as a heat dissipation means for them. As described above, the pedestal main body 600 on which these devices are arranged in the pedestal 60 has a two-layer structure formed by the first main part 610 of the main pedestal 61 and the second main part 620 of the sub-pedestal 62. In this way, by forming the first main part 610 where the light source unit 63 is arranged and the second main part 620 where the power supply unit 66 is arranged into a two-layer structure, the heat capacity of the region between the light source unit 63 and the power supply unit 66 in the pedestal 60 can be increased. As a result, heat concentration on the first main part 610 and the second main part 620 is alleviated, and an increase in the operating temperature of the light source unit 63 and the power supply unit 66 can be suppressed.

[0082] Also, if the contact area between the first main part 610 and the second main part 620 is reduced, the thermal resistance between the first main part 610 and the second main part 620 can be increased, and it is also possible to suppress the thermal interference between the light source unit 63 and the power supply unit 66. For example, a main part protruding portion that protrudes toward the other and contacts the other may be provided on at least one of the first main part 610 and the second main part 620, or a recess that recesses away from the other and becomes non-contact with the other may be provided on at least one of the first main part 610 and the second main part 620. Further, a sheet-like heat insulating member may be interposed between the first main part 610 and the second main part 620.

[0083] Note that since the through hole provided in either one of the first main part 610 of the main pedestal 61 and the second main part 620 of the sub-pedestal 62 is blocked by the other or by the substrate 631 of the light source unit 63, it is possible to suppress foreign matter from entering the inside of the cover 64 or the like through the through hole.

[0084] Further, as described above, the sub-base 62 has a pair of protruding portions 628 that protrude outside the cover 64. In this way, the sub-base 62 that constitutes the base 60 having the pair of protruding portions 628 expands the heat dissipation area and promotes the heat dissipation of the light source unit 63 and the power supply unit 66. Also, in the sub-base 62, the second side portion 625 being in a gutter shape also expands the heat dissipation area and promotes heat dissipation.

[0085] Further, by promoting the heat dissipation of the light source unit 63, the thermal expansion amount of the adhesive for fixing the substrate 631 to the main base 61 is reduced. As a result, the stress applied to the adhesive due to thermal expansion is suppressed, and the bonding quality is maintained in a good state.

[0086] Also, in the case of the usage form in which the power supply unit 66 is covered by the connection mechanism 3 (see FIG. 3) as shown in FIG. 12, with the configuration of the base 60 as described above, an effect of suppressing the rise in the environmental temperature within the space portion SP where the power supply unit 66 is arranged can be expected. As a result, it leads to an improvement in the reliability of the operation of the power supply unit 66. Also, in the case of the usage form in which the power supply unit 66 is covered by the connection mechanism 3, by bringing the lower end portion of the connector 30 into contact (i.e., thermally connecting) with the second side portion 625 of the sub-base 62, the connector 30 also functions as a heat dissipation means.

[0087] Also, as shown in FIG. 2, in the lighting device 1, since the terminal block 47 is installed on the connector 30 interposed between the fixture 2 and the luminaire 6, when renewing the lighting device 1, forgetting to replace the terminal block 47 can be suppressed. Here, the renewal work is assumed to be, for example, removing a conventional luminaire that is a straight tube lamp with a base (fluorescent lamp, LED lamp) from the fixture, using the fixture as it is, and attaching a luminaire 6 having an LED or the like as the light source 630 via the connection mechanism 3. Also, by installing the terminal block 47 on the connector 30 so that a part thereof is exposed, even when the connector 30 is provided, the workability of connecting and wiring (routing) the electric wire 7 can be maintained.

[0088] FIG. 13 is a perspective view of the left lighting fixture 6x in FIG. 2 as viewed from above. FIG. 14 is a circuit diagram showing the electrical circuit of the lighting device 1 in FIG. 2. Using FIGS. 2 to 3 and FIGS. 12 to 14, the connection relationship and arrangement of the electric wires 7 such as the power supply line 71 and the power feed line 72 will be described. As shown in FIG. 14, the power supply line 71 is an electric wire 7 that connects the external power supply S and the power supply unit 66, and the power feed line 72 is an electric wire 7 that connects the power supply unit 66 and the lighting fixture 6. The power supply line 71 is, for example, an external power supply line 712, a terminal-side power supply line 711, a lighting-fixture-side power supply line 710, etc. Also, the power feed line 72 is, for example, an in-lighting-fixture power feed line 720, an inter-lighting-fixture power feed line 721, etc.

[0089] As shown in FIG. 14, among the plurality of main components constituting the lighting device 1, it is sufficient that one of them has a power supply unit 66, a terminal block 47, a lighting-fixture-side power supply line 710, and a terminal-side power supply line 711. In FIG. 2, among the two main components constituting the lighting device 1, the right main component (including the lighting fixture 6 and the connector 30) is connected to the external power supply S, and the left main component (including the lighting fixture 6x and the connector 30x) is not connected to the external power supply S. Hereinafter, the space portion SP in the connector 30x in the left main component may be referred to as the space portion SPx to distinguish it from the space portion SP in the connector 30 in the right main component.

[0090] As shown in FIGS. 13 and 14, the left lighting fixture 6x shown in FIG. 2 is configured to be powered from the power supply unit 66 of the lighting fixture 6 by connecting the lighting fixture 6 and the lighting fixture 6x with the inter-lighting-fixture power feed line 721.

[0091] The lighting fixture 6 has a power supply unit 66, but the lighting fixture 6x does not have a power supply unit 66. Also, the connector 30 has a terminal block 47 installed therein, but the connector 30x does not have a terminal block 47. And the power supply unit 66 of the lighting fixture 6 is configured to supply lighting power to both the lighting fixture 6 and the lighting fixture 6x.

[0092] As shown in Fig. 14, after the completion of the assembly of the lighting device 1, the live parts of the light fixtures 6 and 6x in each main part are covered by the connectors 30 and 30x. That is, as shown in Fig. 14, in the main part connected to the external power supply S, the power supply part 66, the power supply line 71 (the light fixture side power supply line 710 and the terminal side power supply line 711) between the power supply part 66 and the terminal block 47, the connection part C1 between the light fixture side power supply line 710 and the terminal side power supply line 711, and the connection part C2 between one end of the in-fixture power supply line 720 and the between-fixture power supply line 721 are arranged in the space part SP and covered by the connector 30. Also, in the main part not connected to the external power supply S, the connection part C2 between the other end of the in-fixture power supply line 720 and the between-fixture power supply line 721 is arranged in the space part SPx and covered by the connector 30x. Since the terminal block 47 is not required for the connector 30x, the terminal block installation hole 37 (see Fig. 3) is not provided.

[0093] As shown in Figs. 12 and 14, the wiring part between the wiring holes 38 (see Fig. 3) of the connectors 30 and 30x in the between-fixture power supply line 721 is arranged in advance between the housing parts 20 shown in Fig. 2 before the light fixtures 6 and 6x are attached to the appliance 2 via the connectors 30, 30x, etc. As shown in Fig. 12, the external power supply line 712 is drawn into the housing part 20 from the opening 22o for the air-conditioning return in the main part on the right side, and is connected to the part protruding outside the connector 30 at the terminal block 47 after the completion of the assembly of the lighting device 1.

[0094] The structure for installing the power supply part 66 provided on the pedestal 60 of the light fixture 6 may be omitted in the pedestal 60 of the light fixture 6x, but as shown in Fig. 13, a common pedestal 60 may be used for the light fixtures 6 and 6x.

[0095] (Modification 1) FIG. 15 is a schematic cross-sectional view showing a first modification of the sub pedestal 62 in the luminaire 6 of FIG. 9. As shown in FIG. 15, in the sub pedestal 62 according to the first modification, the overhanging portion 628a is formed in a corrugated plate shape in which mountains and valleys alternately appear in the lateral direction (arrow X direction). When the overhanging portion 628a is formed in a corrugated plate shape, the surface area, which is the heat dissipation area, becomes larger compared to the case where it is formed in a planar shape (see FIG. 9). Therefore, the effect of promoting heat dissipation by the overhanging portion 628a can be enhanced. Also, the surface area can be increased with a simple structure.

[0096] (Modification 2) FIG. 16 is a schematic cross-sectional view showing a second modification of the sub pedestal 62 in the luminaire 6 of FIG. 9. In FIG. 16, the broken-line arrow indicates the air flow direction. As shown in FIG. 16, in the sub pedestal 62 according to the second modification, a vent hole 629, which is a raised portion, is formed in the overhanging portion 628b. The vent hole 629 is formed such that the upper surface bulges as the lower surface side of the overhanging portion 628b is recessed upward and opens to the outside in the lateral direction (arrow X direction). The vent hole 629 allows a part of the air that rises from the lower lighting space SL (see FIG. 12) and flows along the lower surface of the overhanging portion 628b to the outside (gap G2 between the overhanging portion 628b and the side surface portion 210) to pass above the overhanging portion 628b. By forming the vent hole 629 in the overhanging portion 628b, the return efficiency can be increased and the effect of promoting heat dissipation can be enhanced. A plurality of vent holes 629 may be provided in the overhanging portion 628b, or a single vent hole 629 may be provided. In FIG. 16, a plurality of vent holes 629 are provided in the lateral direction (arrow X direction) of the overhanging portion 628b. Each vent hole 629 may be provided continuously in the front-rear direction (arrow Y direction), or a plurality of them may be provided at regular intervals.

[0097] (Modification 3) FIG. 17 is a schematic cross-sectional view showing a third modification of the sub-base 62 in the luminaire 6 of FIG. 9. FIG. 18 is an exploded perspective view showing the luminaire 6 of FIG. 17. As shown in FIGS. 17 and 18, in the sub-base 62 according to the third modification, a protruding portion 627c formed on the second side portion 625 and forming a power supply holding portion together with the power supply portion 66 and the second main portion 620 has a configuration in which a part of the second side portion 625 is cut and raised. The protruding portion 627c in FIG. 17 is provided such that a part of the inner wall on the side of the second main portion 620 is cut and raised in the downward U-shaped second side portion 625, and the upper wall of the second side portion 625 extends partly into the space portion SP. Since the lower surface 627cb of the protruding portion 627c is substantially horizontal, the electric wire 7 (for example, the control wire 73) held in the power supply holding portion is difficult to come off and has good moldability. The protruding portion 627c may be configured to be elastically deformed.

[0098] (Modification 4) FIG. 19 is a circuit diagram showing the electric circuit of a fourth modification of the lighting device 1 of FIG. 14. Here, it is assumed that the external power supply line 712a branches and is connected to each main part. Therefore, in the lighting device 1 according to the fourth modification, each main part has a configuration having a terminal block 47, a power supply portion 66, etc. In the lighting device 1 according to the fourth modification, since the power supply portion 66 is provided in each luminaire 6, the inter-luminaire power supply line 721 and the wiring hole 38 of the connector 30 for passing through the end thereof are unnecessary. Further, since there is no wiring hole 38, the protective device 48 is also unnecessary.

[0099] That is, in the lighting device 1 according to the fourth modification, the right luminaire 6 and the left luminaire 6 have the same configuration having a power supply portion 66, etc. respectively. Also, the right connector 30 and the left connector 30 have the same configuration in which a terminal block 47 is installed in each. And the power supply portion 66 of the right luminaire 6 supplies lighting power to the light source portion 63 of the right luminaire 6, and the power supply portion 66 of the left luminaire 6 supplies lighting power to the light source portion 63 of the left luminaire 6.

[0100] As described above, in the fourth modification example, since the power supply unit 66 is added, the lighting device 1 corresponding to a higher output specification (such as brightness) can be provided. In addition, the configurations of the two lamp units 6 can be unified, and the configurations of the two connection mechanisms 3 can be unified, so that the management of parts for each main part becomes easy.

[0101] As described above, the lamp unit 6 according to the first embodiment is a lamp unit including a pedestal 60, a light source unit 63 attached to the lower surface of the pedestal 60, and a power supply unit 66 disposed on the upper surface of the pedestal 60. The pedestal 60 has a double structure including a main pedestal 61 and a sub-pedestal 62 on which a first through hole (through hole 622a) is formed and which is installed on the upper surface of the main pedestal 61. The light source unit 63 is attached to the lower surface of the main pedestal 61. The power supply unit 66 is disposed on the upper surface of the sub-pedestal 62 and is fixed to the main pedestal 61 by a first fixture (fixture 55) through the first through hole of the sub-pedestal. And the sub-pedestal 62 is sandwiched between the power supply unit 66 and the main pedestal 61.

[0102] As described above, in the lamp unit 6, the pedestal 60 has a double structure including the main pedestal 61 and the sub-pedestal 62 installed on the upper surface of the main pedestal 61. The light source unit 63 is attached to the lower surface of the main pedestal 61. The power supply unit 66 is disposed on the upper surface of the sub-pedestal 62 and is fixed to the main pedestal 61 by the fixture 55 so as to sandwich the sub-pedestal 62. Thereby, the heat capacity of the pedestal 60 between the light source unit 63 and the power supply unit 66 can be increased, so that the heat concentration on the main pedestal 61 and the sub-pedestal 62 is alleviated. As a result, compared with the conventional configuration, the lamp unit 6 with improved heat dissipation can be provided.

[0103] The main pedestal 61 and the sub-pedestal 62 have locking portions (pedestal locking portions 611 and pedestal locking portions 621) that engage with each other.

[0104] Thereby, the power supply unit 66 may be fixed to the main pedestal 61 by the fixture 55 in a state where the sub-pedestal 62 is temporarily held with respect to the main pedestal 61. Since the alignment between the main pedestal 61 and the sub-pedestal 62 can be achieved during fixing, the assembly work becomes easy.

[0105] In addition, the luminaire 6 has a pair of cover locking portions 642 that engage with the main pedestal 61, and includes a cover 64 that is attached to the pedestal 60 by the pair of cover locking portions 642 and covers the light source unit 63. The main pedestal 61 has a pair of first side portions 615 that project upward and engage with the pair of cover locking portions 642. The sub-pedestal 62 has a pair of downward gutter-shaped second side portions 625 that project upward so as to form a recess 625r in which the pair of cover locking portions 642 and the pair of first side portions 615 are accommodated.

[0106] As a result, in a state where the cover 64, the sub-pedestal 62, the main pedestal 61, the power supply unit 66, etc. are assembled, the cover 64 cannot be removed even if an operator or user tries to remove it intentionally, and detachment can be prevented. In addition, since the sub-pedestal 62 has a pair of downward gutter-shaped second side portions 625, the rigidity is improved, deformation such as warping or twisting is less likely to occur, the heat dissipation area is enlarged, and heat dissipation is promoted.

[0107] In addition, the sub-pedestal 62 has a pair of overhanging portions 628 that project outward in the lateral direction (arrow X direction) from the cover 64. As a result, structures above the pedestal 60 in the lighting device 1 are less likely to be visually recognized by the user, and the design property is improved. The pair of overhanging portions 628 enlarge the heat dissipation area and promote heat dissipation of the light source unit 63 and the power supply unit 66.

[0108] In addition, each of the pair of overhanging portions 628a is formed in a corrugated shape in which mountains and valleys appear alternately in the lateral direction (arrow X direction). As a result, compared with the case where the overhanging portion 628a is formed in a planar shape (see FIG. 9), the surface area, which is the heat dissipation area, becomes larger, so that the effect of promoting heat dissipation by the overhanging portion 628a can be enhanced. In addition, the surface area can be increased with a simple structure.

[0109] In addition, each of the pair of overhanging portions 628b is formed with a vent hole 629 that is a raised portion. Thereby, the air path can be divided, heat concentration in the pedestal 60 can be suppressed, and the heat dissipation property can be further improved.

[0110] In addition, the lighting fixture 6 includes an electric wire 7 (for example, a control wire 73), and on the inner wall of at least one of the pair of second side portions 625, a protruding portion 627 for holding the electric wire 7 between the power supply unit 66 and the upper surface of the sub-base 62 is formed. Thereby, the components for wiring the electric wire 7 can be reduced.

[0111] Further, the protruding portion 627c is formed by cutting and raising a part of the inner wall of the second side portion 625 in the lateral direction (arrow X direction). Thereby, with a simple structure, it is possible to prevent the electric wire 7 from falling off.

[0112] In addition, the lighting device 1 according to Embodiment 1 includes the above-described lighting fixture 6, a fixture 2 in which the lighting fixture 6 is housed, and a connection mechanism 3 provided between the fixture 2 and the lighting fixture 6, attached to the fixture 2, and to which the lighting fixture 6 is detachably connected. The connection mechanism 3 is provided such that the lower end portion of the connection mechanism 3 contacts the upper surface of the base 60 in a state where the lighting fixture 6 is connected.

[0113] Thus, by bringing the lower end portion of the connection mechanism 3 into contact with the upper surface of the base 60, the connection mechanism 3 also functions as a heat dissipation means, and the heat dissipation performance is further improved.

[0114] In addition, the lighting device 1 has a first coupler 49 fixed to the connection mechanism 3 that engages with each other and a second coupler 65 fixed to the base 60, and includes a coupling mechanism that detachably couples the connection mechanism 3 and the lighting fixture 6. A second through hole (through hole 622b) is formed in the sub-base 62, and the second coupler 65 is disposed on the upper surface of the sub-base 62 and is fixed to the main base 61 by a second fixing tool (fixing tool 56) through the second through hole (through hole 622b) of the sub-base 62.

[0115] Thereby, the main base 61 and the sub-base 62 can be fixed by the fixing tool 56, displacement between the main base 61 and the sub-base 62 can be suppressed, and the main base 61 and the sub-base 62 can be fixed more reliably.

[0116] Hereinafter, various aspects of the present disclosure will be collectively described as appendices.

[0117] [Appendix 1] A lighting fixture comprising a pedestal, a light source unit attached to the lower surface of the pedestal, and a power supply unit disposed on the upper surface of the pedestal, The pedestal has a double structure having a main pedestal and a sub-pedestal on which a first through hole is formed and which is installed on the upper surface of the main pedestal, The light source unit is attached to the lower surface of the main pedestal, The power supply unit is disposed on the upper surface of the sub-pedestal and is fixed to the main pedestal by a first fixture through the first through hole of the sub-pedestal, The sub-pedestal is sandwiched between the power supply unit and the main pedestal Lighting fixture. [Appendix 2] The main pedestal and the sub-pedestal have locking portions that engage with each other The lighting fixture according to Appendix 1. [Appendix 3] It has a pair of cover locking portions that engage with the main pedestal, and includes a cover that is attached to the pedestal by the pair of cover locking portions and covers the light source unit, The main pedestal has a pair of first side portions that project upward and engage with the pair of cover locking portions, The sub-pedestal has a pair of downward gutter-shaped second side portions that project upward so as to form recesses in which the pair of cover locking portions and the pair of first side portions are accommodated The lighting fixture according to Appendix 1 or Appendix 2. [Appendix 4] The sub-pedestal has a pair of overhanging portions that project outward in the lateral direction from the cover The lighting fixture according to Appendix 3. [Appendix 5] Each of the pair of overhanging portions is formed in a corrugated shape in which mountains and valleys appear alternately in the lateral direction The lighting fixture according to Appendix 4. [Appendix 6] Each of the pair of overhanging portions is formed with a vent hole that is a raised portion The lighting fixture according to Appendix 4. [Appendix 7] Comprising an electric wire, On the inner wall of at least one of the second side walls of the pair of second side portions, a protruding portion for holding the electric wire is formed between the power supply unit and the upper surface of the sub pedestal. The lighting fixture according to any one of Appendices 3 to 6. [Appendix 8] The protruding portion is formed by cutting up a part of the inner wall in the lateral direction. The lighting fixture according to Appendix 7. [Appendix 9] The lighting fixture according to any one of Appendices 1 to 8, an appliance in which the lighting fixture is housed, a connection mechanism provided between the appliance and the lighting fixture, attached to the appliance, and to which the lighting fixture is detachably connected, The connection mechanism is provided such that the lower end portion of the connection mechanism contacts the upper surface of the pedestal in a state where the lighting fixture is connected. Lighting device. [Appendix 10] It has a first coupler fixed to the connection mechanism that engages with each other and a second coupler fixed to the pedestal, and includes a connection mechanism that detachably connects the connection mechanism and the lighting fixture. A second through hole is formed in the sub pedestal. The second coupler is disposed on the upper surface of the sub pedestal and is fixed to the main pedestal by a second fixing tool through the second through hole of the sub pedestal. The lighting device according to Appendix 9.

Explanation of symbols

[0118] 1 Lighting device, 2 Appliance, 3 Connection mechanism, 6 Lamp, 6x Lamp, 7 Electric wire, 8 Equipment plate, 9 Support member, 20 Housing part, 21 Side surface part, 22 Top surface part, 22o Opening, 23 Partition plate, 24 Connection mechanism mounting part, 25 Cover part, 26 Appliance fixture, 27 Lamp arrangement part, 28 Equipment machine arrangement part, 29 Light shield, 30 Connector, 30x Connector, 31 Connector main part, 32 Connector side part, 37 Terminal block installation hole, 38 Wiring hole, 40 Adjuster, 41 Horizontal plane, 42 Horizontal plane, 47 Terminal block, 48 Protector, 49 First connector, 50 Fixture, 51 Fixture, 53 Fixture, 54 Fixture, 55 Fixture, 55a Screw with base, 55b Nut, 56 Fixture, 60 Base, 61 Main base, 62 Sub-base, 63 Light source part, 64 Cover, 65 Second connector, 66 Power supply part, 67 Feeding wire holder, 71 Power supply line, 72 Feeding wire, 73 Control line, 210 Side surface part, 241 Screw hole, 600 Base main part, 601 Notch, 610 First main part, 611 Base locking part, 612 Mounting part, 613 Screw hole, 615 First side part, 620 Second main part, 621 Base locking part, 622a Mounting part through hole, 622b Mounting part through hole, 623 Power supply part locking part, 625 Second side part, 625r Recess, 626 Second connector locking hole, 627 Protrusion, 627c Protrusion, 627cb Lower surface, 628 Overhanging part, 628a Overhanging part, 628b Overhanging part, 629 Ventilation hole, 630 Light source, 631 Substrate, 640 Cover main body part, 641 Translucent part, 642 Cover locking part, 645 Cover end part, 651 Connector opening, 652 Connector locking part, 661 Front end part, 710 Lamp side power supply line, 711 Terminal side power supply line, 712 External power supply line, 712a External power supply line, 720 Feeding wire inside lamp, 721 Feeding wire between lamps, C1 Connection part, C2 Connection part, CL System ceiling, D1 Conductor diameter dimension, D2 Outer diameter dimension, G1 Gap, G2 Gap, L1 Distance dimension, S External power supply, SL Lighting space, SP Space part, SPx Space part, WC Width, WL Width.

Claims

1. A lighting fixture comprising a pedestal, a light source unit attached to the lower surface of the pedestal, and a power supply unit disposed on the upper surface of the pedestal, wherein the pedestal has a double structure having a main pedestal and a sub-pedestal on which a first through-hole is formed and which is installed on the upper surface of the main pedestal, the light source unit is attached to the lower surface of the main pedestal, the power supply unit is disposed on the upper surface of the sub-pedestal and is fixed to the main pedestal by a first fixture through the first through-hole of the sub-pedestal, and the sub-pedestal is sandwiched between the power supply unit and the main pedestal lighting fixture.

2. The main pedestal and the sub-pedestal have locking portions that engage with each other The lighting fixture according to claim 1.

3. It has a pair of cover locking portions that engage with the main pedestal, and includes a cover that is attached to the pedestal by the pair of cover locking portions and covers the light source unit, the main pedestal has a pair of first side portions that protrude upward and engage with the pair of cover locking portions, the sub-pedestal has a pair of downward gutter-shaped second side portions that protrude upward so as to form recesses in which the pair of cover locking portions and the pair of first side portions are accommodated The lighting fixture according to claim 1 or claim 2.

4. The sub-pedestal has a pair of overhanging portions that protrude outward in the lateral direction from the cover The lighting fixture according to claim 3.

5. Each of the pair of overhanging portions is formed in a corrugated shape in which mountains and valleys appear alternately in the lateral direction The lighting fixture according to claim 4.

6. Each of the pair of overhanging portions is formed with a vent hole that is a raised portion The lighting fixture according to claim 4.

7. Comprising an electric wire, On the inner wall of at least one of the pair of second side walls of the pair of second side portions, a protruding portion is formed to hold the electric wire between the power supply unit and the upper surface of the sub-pedestal The lighting fixture according to claim 3.

8. The protruding portion is formed by raising a part of the inner wall in the lateral direction The lighting fixture according to claim 7.

9. The lighting fixture according to claim 1, an appliance in which the lighting fixture is housed, and a connection mechanism provided between the appliance and the lighting fixture, attached to the appliance, and to which the lighting fixture is detachably connected, wherein the connection mechanism is provided such that the lower end portion of the connection mechanism contacts the upper surface of the pedestal in a state where the lighting fixture is connected lighting device.

10. It has a first connector fixed to the connection mechanism engaging with each other and a second connector fixed to the pedestal, and includes a connection mechanism for detachably connecting the connection mechanism and the lighting fixture. A second through hole is formed in the auxiliary pedestal. The second connector is disposed on the upper surface of the auxiliary pedestal and is fixed to the main pedestal by a second fixture through the second through hole of the auxiliary pedestal. The lighting device according to claim 9.

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