Illuminating device

Abstract

To provide an illuminating device that is compatible with renewal work for replacing a lighting fixture, and can restrain a decrease in reliability of an electric connection part.SOLUTION: An illuminating device to which electric power is supplied via an external power supply line comprises: an appliance comprising a first case part in which an opening for air conditioning return is formed in a top surface part, and a lower surface is opened, and installed on a ceiling facility; a first lighting fixture housed in the first case part, and comprising a first base, a first light source part installed on a lower surface of the first base, and a power supply part installed on an upper surface of the first base; and a first connection mechanism interposed between the appliance and the first lighting fixture, arranged on an upper side of the first lighting fixture in the first case part, attached to the first case part, and to which the first lighting fixture is detachably connected. A terminal block to which the external power supply line is connected is installed on the first connection mechanism.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a lighting device including a luminaire separable from an appliance.

Background Art

[0002] In a lighting device, for example, there is known a lighting device including an appliance installed in ceiling equipment and a luminaire separable from the appliance, where the appliance is continuously used and the luminaire is replaced in a renewal construction (see, for example, Patent Document 1). The lighting device of Patent Document 1 is configured such that an LED unit (luminaire) is supported by a support unit (appliance) installed on the ceiling, and the LED unit can be removed from the support unit for replacement. In the lighting device of Patent Document 1, when replacing the LED unit, first, while one side in the lateral direction of the LED unit is supported by the support unit, the other end is pulled downward halfway to make the LED unit in an intermediate posture. Next, by removing the arm portion of the elastic holding portion attached to the fixed-side case of the support unit from the spring lock attached to the movable-side case of the LED unit, the LED unit takes a posture of hanging downward according to gravity. Further, by releasing the engagement between a sleeve, which is a part of the LED unit, and a slit of the engaging member on one side in the lateral direction of the LED unit, the LED unit is removed from the support unit. Also, the lighting device of Patent Document 1 includes, for example, a terminal block for receiving power from a commercial 100V AC power supply, and this terminal block is connected to the power supply unit by a cable. The power supply unit converts the input 100V AC power into DC power and outputs it to a light source or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the lighting device disclosed in Patent Document 1, although the power supply unit is provided in the LED unit (luminaire), the terminal block to which the external power line is connected is provided in the support unit (appliance). Therefore, during the renewal work of replacing the luminaire, the terminal block is not replaced, and the existing terminal block is continuously used for a long time beyond the appropriate replacement time, which may reduce the reliability of the electrical connection part.

[0005] The present disclosure has been made to solve the above problems, and provides a lighting device capable of suppressing a decrease in the reliability of an electrical connection part in a lighting device corresponding to renewal work of replacing a luminaire.

Means for Solving the Problems

[0006] The lighting device according to the present disclosure is a lighting device to which power is supplied via an external power line, and includes a first housing part having an opening for air-conditioning return formed in the top surface and an opening in the lower surface, and is installed in ceiling equipment. An appliance, a first luminaire housed in the first housing part, having a first pedestal, a first light source part installed on the lower surface of the first pedestal, and a power supply part installed on the upper surface of the first pedestal, and is interposed between the appliance and the first luminaire, and is disposed above the first luminaire in the first housing part, and is attached to the first housing part, and a first connection mechanism to which the first luminaire is detachably connected, and a terminal block to which the external power line is connected is installed in the first connection mechanism.

Effects of the Invention

[0007] The lighting device according to the present disclosure is interposed between an appliance and a first luminaire, is disposed above the first luminaire within a first housing portion, is attached to the first housing portion, and includes a first connection mechanism to which the first luminaire is detachably connected. And a terminal block to which an external power line is connected is installed in this first connection mechanism. Therefore, since the terminal block is installed in the first connection mechanism that is newly attached to the existing appliance during the renewal construction, it is possible to prevent the operator from forgetting to replace the terminal block during the renewal construction. Therefore, it is possible to suppress a decrease in the reliability of the electrical connection portion due to continued use without replacing the existing terminal block.

Brief Description of Drawings

[0008]

Figure 1

Figure 2

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Figure 24

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of 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 easy understanding, but this is for the purpose of explanation and these terms do not limit the present disclosure. Examples of terms indicating directions include "up", "down", "right", "left", "front", or "rear", etc.

[0010] Embodiment 1. FIG. 1 is an external perspective view showing the lighting device 1 according to Embodiment 1 from below. 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.

[0011] The lighting device 1 includes a fixture 2 attached to the support member 9 and two lamp units 6 attached to the fixture 2. The lamp unit 6 is a so-called light source unit. The two lamp units 6 are arranged at intervals from each other, and an equipment plate 8 is provided between the two lamp units 6. Further, a light shielding member 29 such as a louver is provided below each lamp unit 6.

[0012] FIG. 2 is an exploded perspective view showing the lighting device 1 of FIG. 1. FIG. 3 is a perspective view of the fixture 2 of FIG. 2 as viewed from above. Based on FIGS. 2 and 3, the schematic configuration and outline of the lighting device 1 will be described. In FIG. 2, in the lighting device 1 shown in FIG. 1, the equipment plate 8 is removed to expose the internal equipment arrangement section 28, and a state in which the portion on the right side of the equipment arrangement section 28 is disassembled is illustrated. In the lighting device 1 of Embodiment 1, the portion on the right side of the equipment arrangement section 28 and the portion on the left side have substantially the same configuration.

[0013] As shown in FIG. 2, the lighting device 1 according to Embodiment 1 includes a fixture 2, two lamp units 6, a connector 30 fixed to the fixture 2 to which the lamp units 6 are attached, a light-shielding member 29 disposed on the light irradiation side of each lamp unit 6, and an equipment plate 8 (see FIG. 1) disposed between the two lamp units 6. Further, an electric wire 7 is disposed in the lighting device 1. Note that the light-shielding member 29 and the equipment plate 8 may be omitted.

[0014] The connector 30 is provided with a terminal block 47. In FIG. 2, 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). The terminal block 47 connects an external power source S (see FIG. 12 described later) and a power supply unit 66 (see FIG. 9 described later).

[0015] Further, the lighting device 1 includes an adjuster 40 that forms a space between the top surface portion 22 and the top surface of the connector 30. The lighting device 1 is disposed at a part between the top surface portion 22 of the fixture 2 (see FIG. 3 described later) and the connector 30. In FIG. 2, two adjusters 40 are disposed on each of the front side portion and the rear side portion of the lighting device 1, and a total of four adjusters 40 are provided.

[0016] In addition, the lighting device 1 is provided with a coupling mechanism for detachably coupling the connector 30 and the luminaire 6. The coupling mechanism is composed of a first coupling member 49 provided on the connector 30 and a second coupling member 65 provided on the luminaire 6. Hereinafter, it is defined that the first coupling member 49 provided on the connector 30 is a spring such as a leaf spring, and the second coupling member 65 provided on the luminaire 6 is a spring receiver. The first coupling member 49 and the second coupling member 65 are configured to be coupled to each other without using tools such as a driver.

[0017] 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 lighting device 1 provided with the connector 30 and the luminaire 6 may be attached to an existing facility fixture. Further, for example, in FIG. 2, the lighting device 1 includes two luminaires 6 and the same number of connectors 30 and light-shielding members 29 as the luminaires 6, but the number of luminaires 6, connectors 30, and light-shielding members 29 may be one or three or more. Also, in FIG. 2, two adjusters 40 are arranged for each connector 30, but three or more adjusters 40 may be arranged for each connector 30. Further, for example, the light-shielding member 29 may have a structure other than a louver.

[0018] Also, 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 luminaire 6 may be a spring. Further, the coupling mechanism may be any configuration as long as it couples the connector 30 and the luminaire 6, and is not limited to a combination of a spring and a spring receiver. Also, for each luminaire 6, one set or three or more sets of coupling mechanisms for coupling the connector 30 and the luminaire 6 may be provided. Further, when a plurality of sets of coupling mechanisms are provided, different types of coupling mechanisms may be used.

[0019] (Fixture 2) As shown in FIG. 3, 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 constitute the left and right side surfaces, two lid portions 25 that constitute the front and rear side surfaces, and two top portions 22 that respectively constitute the upper surfaces on the left and right sides. 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 their upper ends. 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.

[0020] (Side portion 21, lid portion 25) The side portion 21 is a rectangular plate-shaped member that extends 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 that extends 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. Note that a flange 21f that extends outward is provided at the lower end portion of the side portion 21.

[0021] In FIG. 3, the front lid portion 25 is integrally formed by connecting the upper ends of a left lid portion 251 that covers the front side of the left housing portion 20 and a right lid portion 252 that covers the front side of the right housing portion 20 in the lateral direction (arrow X direction) by a lid connection portion 253. Similarly, the rear lid portion 25 is integrally formed by connecting the upper ends of a left lid portion 251 that covers the rear side of the left housing portion 20 and a right lid portion 252 that covers the rear side of the right housing portion 20 in the lateral direction (arrow X direction). Further, a lid flange portion 254 that extends rearward is provided at the upper end portion of the front lid portion 25, and a lid flange portion 254 that extends forward is provided at the upper end portion of the rear lid portion 25. That is, the upper portion of the lid portion 25 is bent so that the cross section is L-shaped.

[0022] Note that the configuration of each lid portion 25 is not limited to the above configuration. For example, the left lid portion 251, the right lid portion 252, and the lid connection portion 253 may be configured as separate members and fixed to each other.

[0023] As shown in FIGS. 2 and 3, the inter-luminaire power supply wire 721 that connects between the luminaires 6 (see FIG. 2) among the electric wires 7 is arranged along the inside of the lid portion 25. In FIG. 3, the inter-luminaire power supply wire 721 is wired from inside the right housing portion 20 through the equipment arrangement portion 28 into the left housing portion 20 along the inside of the upper part of the rear lid portion 25. And each end of the inter-luminaire power supply wire 721 is arranged inside the connector 30 arranged in each housing portion 20.

[0024] Also, fixture fixing tools 26 for fixing the fixture 2 are provided on the left lid portion 251 and the right lid portion 252 of the lid portion 25, respectively. The fixture fixing tool 26 is, for example, a mounting bracket that is screwed to the lid portion 25 of the fixture 2 and has a claw at the tip that is hooked on the support member 9 (see FIG. 1).

[0025] (Partition plate 23) In the front-rear direction (arrow Y direction), the two partition plates 23 have the same length as the side surface portion 21 and partition the inside of the rectangular frame formed by the two side surface portions 21 and the two lid portions 25 into three spaces in the lateral direction (arrow X direction). As shown in FIGS. 2 and 3, the spaces at both ends, that is, the spaces inside each housing portion 20, are the luminaire arrangement portions 27. Luminaires 6 and the like are accommodated in the luminaire arrangement portions 27. Equipment such as a speaker or an emergency light (not shown) is accommodated in the equipment arrangement portion 28 provided between the two luminaire arrangement portions 27.

[0026] (Top surface portion 22) As shown in FIG. 3, the top surface portion 22 is a rectangular plate-like member extending in the front-rear direction (arrow Y direction). The left top surface portion 22 connects the upper ends of the side surface portion 21 and the partition plate 23 in the lateral direction (arrow X direction), and connects the upper ends of the respective left lid portions 251 of the two lid body portions 25 in the front-rear direction (arrow Y direction). The right top surface portion 22 connects the upper ends of the side surface portion 21 and the partition plate 23 in the lateral direction (arrow X direction), and connects the upper ends of the respective right lid portions 252 of the two lid body portions 25 in the front-rear direction (arrow Y direction). In a state where the lighting device 1 is attached to the attachment portion, the two top surface portions 22 face the attachment portion.

[0027] 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. In FIG. 3, the connection mechanism attachment portion 24 is provided on the center line VL in the lateral direction (arrow X direction) at each of the front end portion and the rear end portion of the top surface portion 22 of each housing portion 20, and a plurality of openings 22o are formed in the front-rear direction (arrow Y direction) on both sides of the center line VL in the lateral direction (arrow X direction) of the top surface portion 22. The configuration of the connection mechanism attachment portion 24 will be described later.

[0028] FIG. 4 is a perspective view showing a state before the first coupler 49 is fixed to the connector 30 of FIG. 2. FIG. 5 is a perspective view of the connector 30 of FIG. 4 viewed from above. Hereinafter, based on FIGS. 2 to 5, each configuration of the first coupler 49 and the connector 30 will be described in detail.

[0029] (First Coupler 49) As shown in FIG. 2, the first coupler 49 is fixed to the connector 30 using a fixture 50 such as a screw. The first coupler 49 is a longitudinally shaped spring formed of an elastic material such as a stainless steel material or a spring steel plate. It has a first connection fixing portion 491 fixed to the connector 30, a first connection deformation portion 492 that elastically deforms under a load, and a first connection engagement portion 493 that engages with the second coupler 65 of the lamp 6. The first connection fixing portion 491 is a flat plate-like member, and an insertion hole 490 into which the fixture 50 is inserted is provided in the first connection fixing portion 491. The first connection deformation portion 492 is a strip-like member extending in the longitudinal direction of the first coupler 49. For example, it has a curved portion and a bent portion and has elasticity, and is connected to the first connection fixing portion 491. When the first connection deformation portion 492 deflects downward, a force that tries to return upward acts. The first connection engagement portion 493 is connected to the tip of the first connection deformation portion 492 and is a member that engages with the second coupler 65 of the lamp 6. The first connection engagement portion 493 has, for example, a key shape. In the first coupler 49 fixed to the connector 30 and the appliance 2 by the fixture 50, when the first connection engagement portion 493 engages with the second coupler 65 of the lamp 6, the lamp 6 is attached to the appliance 2 via the connector 30.

[0030] One or more first couplers 49 are provided for each connector 30. In the example of FIG. 2, two first couplers 49 are provided for one connector 30 extending in the front-rear direction. One of the first couplers 49 is fixed to the front side portion of the connector 30 (particularly, the front side portion of the connector main body 31 shown in FIG. 5 described later), and the other first coupler 49 is fixed to the rear side portion of the connector 30 (particularly, the rear side portion of the connector main body 31 shown in FIG. 5). The first coupler 49 is fixed to the connector 30 such that its longitudinal direction is the longitudinal direction (front-rear direction) of the connector 30. The first connection fixing portion 491 is disposed on the central side in the longitudinal direction of the connector 30, and the first connection engagement portion 493 is disposed on the end side in the longitudinal direction of the connector 30.

[0031] (Connector 30) As shown in Fig. 2, the connector 30 and the adjuster 40 attached to the connector 30 are a connection mechanism 3 for attaching the lamp unit 6 to the appliance 2. In other words, the connection mechanism 3 connects a first coupler 49 for coupling to a second coupler 65 on the lamp unit 6 side to the appliance 2. The connector 30 has an elongated shape extending in the front-rear direction (arrow Y direction), and is housed in the lamp unit arrangement portion 27 of the appliance 2 in a state of being fixed to the appliance 2.

[0032] 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. 11 described later) in which the power supply unit 66 and the like are arranged between the upper surface of the pedestal 60 of the lamp unit 6.

[0033] Specifically, as shown in Fig. 5, the connector 30 has a connector main portion 31 facing the top surface portion 22 of the appliance 2 in a state of being attached to the appliance 2 shown in Fig. 3, and a pair of connector side portions 32 arranged on both sides of the connector main portion 31 along the longitudinal direction of the connector main portion 31. Each of the connector main portion 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 portion 31).

[0034] As shown in Fig. 2, in the lateral direction (arrow X direction), the width of the lower end of the connector 30 is set to be approximately the same as the width of the cover 64 of the lamp unit 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 unit 6 in a state where the connector 30 and the lamp unit 6 are attached to the appliance 2 (see Fig. 11 described later).

[0035] As shown in Fig. 5, each lower end 33 of the pair of connector side parts 32 forms a curled shape that curves inward. Each lower end 33 of the pair of connector side parts 32 can be formed, for example, by a curling process that folds back inward. Note that the lower ends 33 of the pair of connector side parts 32 may not be folded back inward, and the tip of the plate-like member of the connector 30 may be in contact with the upper surface of the pedestal 60 (see Fig. 2).

[0036] As shown in Fig. 5, the connector 30 is formed with one or more ventilation holes 34. In Fig. 5, a plurality of slit-shaped ventilation holes 34 extending in the front-rear direction are provided in the central part of the connector main body 31 in the front-rear direction (arrow Y direction) in the lateral direction (arrow X direction).

[0037] In addition, this connector 30 constituting the connection mechanism 3 is provided with a pair of spring attachment parts 36, a pair of adjuster attachment parts 35, a terminal block installation part 37, and a wiring hole 38 through which the end of the power supply wire 721 between lamps (see Fig. 3) passes. Further, the connector 30 is provided with a protector 48 (see Fig. 10 described later) for protecting the electric wire 7.

[0038] The spring attachment part 36 is provided on the connector main body 31, and a first connector 49 (see Fig. 2) is attached to the spring attachment part 36. In Fig. 5, the spring attachment part 36 is formed by raising a part of the connector main body 31 and includes a spring insertion part 360 into which the first connection fixing part 491 (see Fig. 2) is inserted, and a screw hole 361 to which a fixture 50 (see Fig. 2) for fixing the first connector 49 is screwed. The structure, number, and position of the spring attachment part 36 are provided corresponding to the type (i.e., structure), number, and position of the connection mechanism.

[0039] In the examples of Figs. 2 and 5, since the first connectors 49 are respectively arranged on the front side part and the rear side part of the connector main body 31, spring attachment parts 36 are respectively formed on the front side part and the rear side part of the connector main body 31. In the connector main body 31, both the spring insertion part 360 and the screw hole 361 are provided at substantially the center in the lateral direction (arrow X direction) of the connector main body 31.

[0040] The adjuster attachment portion 35 is provided on the main connector portion 31, and an adjuster 40 (see FIG. 2) is attached to the adjuster attachment portion 35. In FIG. 5, the adjuster attachment portion 35 is formed by raising a part of the main connector portion 31 and includes an adjuster locking portion 350 that engages with the adjuster 40, and a screw insertion hole 351 into which a fixture 54 (see FIG. 2) for fixing the adjuster 40 is inserted. The structure, number, and position of the adjuster attachment portion 35 are provided corresponding to the structure, number, and position of the adjuster 40.

[0041] In the examples of FIGS. 2 and 5, since the adjusters 40 are respectively arranged at the front end portion and the rear end portion of the main connector portion 31, the adjuster attachment portions 35 are respectively formed at the front end portion and the rear end portion of the main connector portion 31. In the main connector portion 31, the adjuster locking portion 350 and the screw insertion hole 351 are provided such that the adjuster locking portion 350 is on the side of the central position in the front-rear direction (arrow Y direction) of the main connector portion 31 rather than the screw insertion hole 351. Also, in the main connector portion 31, the adjuster locking portion 350 and the screw insertion hole 351 are provided on one side and the other side of the central position in the lateral direction (arrow X direction) of the main connector portion 31. Specifically, in each of the front end portion and the rear end portion of the main connector portion 31, the screw insertion hole 351 is formed on the right side rather than the central position in the lateral direction (arrow X direction) of the main connector portion 31, and the adjuster locking portion 350 is formed on the left side.

[0042] As shown in FIGS. 2 and 5, a terminal block 47 is installed in the terminal block installation part 37. In FIG. 5, the terminal block installation part 37 includes a through hole 370 for connecting an external power supply line 712 (see FIG. 11 described later) to the terminal block 47, and a screw hole 371 to which a fixture 53 such as a screw for fixing the terminal block 47 (see FIG. 10 described later) is screwed. In FIG. 5, since the terminal block 47 is installed in the front part of the connector 30, the through hole 370 is formed in the front part of the connector 30. Specifically, the through hole 370 is formed in the front part of the right connector side part 32 of the pair of connector side parts 32 of the connector 30, and the screw hole 371 is formed in the front part of the connector main body 31. In FIG. 5, the terminal block 47 is provided such that a part of the terminal block 47 protrudes outside the connector 30 through the through hole 370, and the external power supply line 712 is connected to this protruding part of the terminal block 47. Note that the part of the terminal block 47 to which the external power supply line 712 is connected does not necessarily have to protrude from the connector 30, and it may be exposed through the through hole 370. In this case, it is preferable that the through hole 370 of the connector 30 is blocked by the terminal block 47 in order to prevent foreign matter from entering the space part SP through the through hole 370.

[0043] Also, a wiring hole 38 through which an end of the power supply line 721 between lamps (see FIG. 3) passes is formed in the rear part of one (the right side in FIG. 5) of the pair of connector side parts 32 of the connector 30. A protector 48 (see FIG. 10 described later) for protecting the power supply line 721 between lamps is attached to the wiring hole 38.

[0044] (Adjusting tool 40) FIG. 6 is a perspective view of the adjusting tool 40 on the front side of FIG. 2 as viewed from above. FIG. 7 is a perspective view of the adjusting tool 40 on the rear side of FIG. 2 as viewed from above. Hereinafter, based on FIGS. 2 to 7, the configuration of the adjusting tool 40 and the connection mechanism attachment part 24 on the appliance 2 side to which the adjusting tool 40 is attached will be described in detail.

[0045] (Connection mechanism attachment part 24) As shown in FIGS. 3 and 6, the connection mechanism mounting portion 24 is provided so as to protrude downward from the top surface portion 22 of the housing portion 20, and is formed, for example, by cutting and raising a part of the top surface portion 22 downward. As shown by the dashed line in FIG. 6, the front connection mechanism mounting portion 24 extends downward from the top surface portion 22 and then has a substantially L-shaped configuration extending forward.

[0046] Specifically, the front connection mechanism mounting portion 24 includes a rectangular fixing portion 240 provided parallel to the top surface portion 22 below the top surface portion 22, and a rectangular connection portion 242 extending in the vertical direction (arrow Z direction) connecting the rear edge of the fixing portion 240 and the top surface portion 22. The fixing portion 240 is provided with a screw hole 241 to which a fixture 51 (see FIG. 2) for fixing the adjuster 40 to the connection mechanism mounting portion 24 is screwed.

[0047] As shown in FIG. 3, the front connection mechanism mounting portion 24 and the rear connection mechanism mounting portion 24 provided on the same housing portion 20 have the same shape. The rear connection mechanism mounting portion 24 shown in FIG. 7 is provided in a direction in which the front connection mechanism mounting portion 24 shown in FIG. 6 is inverted in the front-rear direction (arrow Y direction).

[0048] (Adjuster 40) As shown in FIG. 2, the adjuster 40 connects the appliance 2 and the connector 30 and adjusts the height position of the connector 30 within the housing portion 20. As shown in FIG. 6, the adjuster 40 includes an appliance mounting portion 42 attached to the appliance 2 (see FIG. 3), a connector mounting portion 43 attached to the connector 30, and an adjuster main portion 41 connecting the appliance mounting portion 42 and the connector mounting portion 43. Specifically, the appliance mounting portion 42 of the adjuster 40 is attached to the connection mechanism mounting portion 24 provided on the top surface portion 22 (see FIG. 3) of the housing portion 20, and the connector mounting portion 43 of the adjuster 40 is attached to the adjuster mounting portion 35 provided on the connector main portion 31 (see FIG. 5) of the connector 30. As shown in FIG. 2, the top surface portion 22 of the housing portion 20 and the connector 30 are connected by a pair of front and rear adjusters 40.

[0049] As shown in FIG. 6, the adjuster 40 has, for example, a two-step stepped shape. A step is formed between the instrument mounting portion 42 and the connector mounting portion 43 by the main body portion 41 of the adjuster. The instrument mounting portion 42 is formed with a pair of instrument locking portions 420 that engage with the fixing portion 240 on the distal end side of the connection mechanism mounting portion 24, and a screw insertion hole 421 into which a fixture 51 for fixing the adjuster 40 to the connection mechanism mounting portion 24 is inserted. The pair of instrument locking portions 420 are a pair of claws provided to protrude upward and bent so that their tips approach each other, and are configured to hold the fixing portion 240 of the connection mechanism mounting portion 24 from both sides in the lateral direction (arrow X direction). The pair of instrument locking portions 420 are provided to face each other in the lateral direction (arrow X direction) so that the fixing portion 240 of the connection mechanism mounting portion 24 can be inserted by sliding relatively in the front-rear direction (arrow Y direction) from the side of the main body portion 41 of the adjuster. Actually, the operator moves the adjuster 40 in the front-rear direction (in FIG. 6, the direction of arrow A) with respect to the connection mechanism mounting portion 24 of the instrument 2. The pair of instrument locking portions 420 are formed, for example, by raising a part of the instrument mounting portion 42.

[0050] A hanging flange 422 extending downward is formed on the outer peripheral portion of the instrument mounting portion 42 excluding the portion where the main body portion 41 of the adjuster is connected. Further, the end portion 423 on the side of the main body portion 41 of the hanging flange 422 is bent outward and is disposed substantially on the same plane as the main body portion 41 of the adjuster.

[0051] The connector mounting portion 43 is formed with a connector locking hole 430 into which the adjuster locking portion 350 of the connector main body 31 (see FIG. 5) is inserted, and a screw hole 431 to which a fixture 54 for fixing the connector 30 to the connector mounting portion 43 is screwed. The connector locking hole 430 extends in the lateral direction (arrow X direction). The connector locking hole 430 has a first expansion portion P1 that expands forward on one side in the lateral direction, and a second expansion portion P2 that expands rearward on the other side in the lateral direction. In each adjuster 40 of FIGS. 6 and 7, the first expansion portion P1 that expands forward is provided on the right side of the connector locking hole 430, and the second expansion portion P2 that expands rearward is provided on the left side of the connector locking hole 430.

[0052] That is, when the connector 30 is attached to the adjuster 40, the adjuster locking portion 350 inserted into one side in the lateral direction of the connector locking hole 430 can slide in the lateral direction (in the direction of arrow B in FIG. 6) along the edge of the connector locking hole 430 to the other side in the lateral direction. Further, when the adjuster 40 is removed from the connector 30, the adjuster locking portion 350 engaged with the edge on the other side in the lateral direction of the connector locking hole 430 is configured to be movable in a direction away from the main body portion 41 of the adjuster (rearward in FIG. 6) so as to be removable from the connector locking hole 430.

[0053] In a state where the adjuster 40 is attached to the appliance 2 and the connector 30 (see FIG. 2), the main body portion 41 of the adjuster is arranged to be parallel to the hanging connection portion 242 in the connection mechanism attachment portion 24 of the appliance 2. The height dimension H1 of the main body portion 41 of the adjuster 40 is determined to be an arbitrary dimension within a range not exceeding the height dimension H2 of the connection portion 242 of the connection mechanism attachment portion 24. The height position of the connector 30 in the above-described housing portion 20 (see FIG. 3) is determined by the height dimension H1 of the main body portion 41 of the adjuster.

[0054] FIG. 8 is an enlarged perspective view showing the lighting fixture 6 of FIG. 2. In FIG. 8, the structure inside the cover 64 is shown for a part of the lighting fixture 6. FIG. 9 is a perspective view of the lighting fixture 6 of FIG. 8 viewed from above. FIG. 10 is a perspective view showing the main part of the lighting device 1 of the first embodiment viewed from above. FIG. 11 is a schematic cross-sectional view showing the main part of the lighting device 1 of FIG. 1. The main part of the lighting device 1 is a structural part that takes the housing portion 20 (see FIG. 3) and a pair of adjusters 40, connectors 30, lighting fixtures 6, and light-shielding members 29 (see FIG. 2) attached to the housing portion 20 as a unit. Hereinafter, the side surface portion 21 and the partition plate 23 of the housing portion 20 may not be distinguished from each other, and each may be referred to as a side surface portion 210. FIG. 12 is a circuit diagram showing the electric circuit of the lighting device 1 according to the first embodiment. With reference to FIGS. 2 to 4 and FIGS. 8 to 12, the configuration of the lighting fixture 6 and the arrangement of various electric wires 7 will be described in particular.

[0055] As shown in FIG. 2, the luminaire 6 has an elongated shape extending in the front-rear direction (the direction of arrow Y), and is housed in the luminaire arrangement portion 27 of the fixture 2 together with a pair of adjusters 40 and connectors 30. The light shield 29 changes the irradiation direction of the lighting device 1, and is attached to the fixture 2 so as to cover the luminaire 6. In the example of FIG. 2, the light shield 29 is a louver in which a plurality of elongated members are arranged in parallel.

[0056] (Luminaire 6) As shown in FIGS. 8 and 9, the luminaire 6 is a light source unit that irradiates light to the irradiation target area by the power supplied from an external power source S (see FIG. 12). As shown in FIG. 9, the luminaire 6 includes a pedestal 60 that is a base plate, a light source unit 63 (see FIG. 8) and a power supply unit 66 installed on the pedestal 60, a cover 64 that transmits light and covers the light source unit 63, a pair of second connectors 65, and the like. Further, as shown in FIG. 12, the lighting device 1 has electric wires 7 such as a power cord 71 and a power supply line 72, and a part of these electric wires 7 (for example, the luminaire-side power cord 710 and the in-luminaire power supply line 720) is provided on the luminaire 6.

[0057] (Light source unit 63) As shown in FIG. 8, the light source unit 63 is, for example, a light source that emits light, such as LEDs (Light Emitting Diodes), mounted on a substrate 631 in the longitudinal direction, and is attached to the lower surface of the pedestal 60. Note that the light source is not limited to an LED, and may be a semiconductor laser, an organic EL (Electro Luminescence), an inorganic EL, or the like.

[0058] (Live part) As shown in FIG. 9, the power supply unit 66 is attached to the upper surface of the pedestal 60, and converts the power supplied from the external power source S for supplying to each device. The power supply unit 66 lights the light source unit 63, for example. As shown in FIG. 12, the light source unit 63 is connected to the power supply unit 66 by the power supply line 72.

[0059] As shown in FIGS. 9 and 12, a lamp-side power line 710, which is part of the power line 71, extends from the power supply unit 66. As shown in FIG. 12, the lamp-side power line 710 is connected to a terminal-side power line 711 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 work). The terminal-side power line 711 extends from a portion disposed inside the connector 30 in the terminal block 47. Since the terminal block 47 is provided at the front portion of the connector 30 in FIG. 2, in FIG. 9, the lamp-side power line 710 is configured to extend from the front end of the power supply unit 66.

[0060] By installing the terminal block 47 so as to penetrate the connector 30, as described above, when assembling the lighting device 1, the power line 71 connecting the external power supply S and the power supply unit 66 can be wired via the terminal block 47 provided in the connector 30. Therefore, even in a configuration where the connector 30 is provided between the appliance 2 and the lamp 6, the external power line 712 (for example, an F cable) may be connected to a portion protruding from the connector 30 at the terminal block 47. Thus, the length of the external power line 712 is sufficient to be of the same degree as that of a lighting device in which a terminal block is provided on the appliance 2 side as in the prior art, and the wiring work can also be simplified without complication.

[0061] Also, during renovation work, since the power line 71 is wired via the new terminal block 47 provided in the connector 30, there is no risk of accidentally using an existing old terminal block (not shown). As a result, the occurrence of problems due to the terminal block 47 is suppressed, and the reliability of the lighting device 1 is improved.

[0062] As shown in FIG. 12, one of the plurality of main components constituting the lighting device 1 may have a power supply unit 66, a terminal block 47, a lamp-side power supply line 710, and a terminal-side power supply line 711. Hereinafter, among the plurality of main components constituting the lighting device 1, the lamp, the connector, and the space part of the main component not connected to the external power supply S are distinguished from the lamp 6, the connector 30, and the space part SP of the main component connected to the external power supply S, and may be referred to as the lamp 6x, the connector 30x, and the space part SPx. The in-lamp power supply lines 720 in the lamp 6 and the lamp 6x are connected to each other by the inter-lamp power supply line 721 during the assembly of the lighting device 1, so that the lamp 6x is also configured to be powered from the power supply unit 66 of the lamp 6.

[0063] Further, hereinafter, among the two main components shown in FIG. 2, the housing part 20, the lamp 6, and the connection mechanism 3 of one of the main components (for example, the right side) are referred to as the first housing part, the first lamp, and the first connection mechanism, the pedestal 60 and the light source part 63 of the first lamp are referred to as the first pedestal and the first light source part, and the connector 30 of the first connection mechanism may be referred to as the first connector. Also, among the two main components shown in FIG. 2, the housing part 20, the lamp 6, and the connection mechanism 3 of the other main component (the left side) are referred to as the second housing part, the second lamp, and the second connection mechanism, the pedestal 60 and the light source part 63 of the second lamp are referred to as the second pedestal and the second light source part, and the connector 30 of the second connection mechanism may be referred to as the second connector.

[0064] In Embodiment 1, as shown in FIG. 12, the first lamp (lamp 6) has a power supply unit 66, but the second lamp (lamp 6x) does not have a power supply unit 66. Also, a terminal block 47 is installed in the first connector (connector 30) of the first connection mechanism, but the second connector (connector 30x) of the second connection mechanism does not have a terminal block 47. And the power supply unit 66 of the first lamp (lamp 6) is configured to supply lighting power to the first light source part and the second light source part.

[0065] As shown in FIGS. 10 to 12, after the completion of the assembly of the lighting device 1, the live parts of the light fixtures 6 and 6x at each main part are covered by the connectors 30 and 30x. That is, as shown in FIG. 12, at the main part connected to the external power source 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. Further, at the main part not connected to the external power source 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 part 37 is not provided.

[0066] As shown in FIGS. 11 and 12, the wiring part between the wiring holes 38 (see FIG. 10) of the connectors 30 and 30x in the between-fixture power supply line 721 is arranged in advance between the housing parts 20 as shown in FIG. 3 before the light fixture 6 is attached to the appliance 2 via the connector 30 or the like. As shown in FIG. 11, the external power supply line 712 is drawn into the housing part 20 from the opening 22o for the air-conditioning return, and after the completion of the assembly of the lighting device 1, it is connected to the part protruding outside the connector 30 at the terminal block 47.

[0067] (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 part 22 of the housing part 20 in a state where the light fixture 6 is attached to the appliance 2 (housing part 20) via the connector 30 or the like as shown in FIGS. 3 and 11. Specifically, as shown in FIGS. 2 and 11, 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).

[0068] In FIGS. 8 and 9, the pedestal 60 has a double structure including a main pedestal 61 where the light source unit 63 is installed and the cover 64 is attached, and a sub-pedestal 62 disposed on the upper surface of the main pedestal 61 on which the power supply unit 66 etc. 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 composed of, for example, sheet metal materials.

[0069] As shown in FIG. 8, 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 611 extending upward provided at the edge portions on both sides in the lateral direction (arrow X direction) of the first main portion 610. As shown in FIGS. 8 and 11, in the main pedestal 61, the light source unit 63 is installed on the lower surface of the first main portion 610, and a cover 64 covering the light source unit 63 is engaged with the pair of first side portions 611.

[0070] As shown in FIGS. 8 and 9, the sub-pedestal 62 has a rectangular shape with a width larger than the width of the main pedestal 61. As shown in FIG. 9, 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 622 constituting the left and right portions, and a pair of second side portions 621 provided so as to protrude upward between the second main portion 620 and each overhanging portion 622.

[0071] As shown in FIG. 11, the second side portion 621 is formed, for example, by bending a portion between the second main portion 620 and each overhanging portion 622 in the sheet metal material constituting the sub-pedestal 62 so that the cross-sectional shape is downward U-shaped, and a concave portion 621s is formed on the lower surface side of the second side portion 621. 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 611 is accommodated in the concave portion 621s formed on the lower surface side of each second side portion 621.

[0072] Also, as shown in FIG. 11, 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 of the connector 30 contact a pair of second side portions 621 of the sub-pedestal 62. In FIG. 11, the lower ends 33 of the pair of connector side portions 32 are configured to contact the upper end surfaces of the pair of second side portions 621 of the sub-pedestal 62.

[0073] In this way, a space portion SP in which the power supply unit 66 or the like is arranged is formed between the connector 30 and the pedestal 60 of the lamp 6 (particularly, the second main portion 620 and the pair of second side portions 621 of the sub-pedestal 62). Both ends in the front-rear direction (arrow Y direction) of this space portion SP are closed by a pair of adjusters 40 (see FIG. 10). Specifically, it is closed by the adjuster main portion 41 and the fixture mounting portion 42 (including the hanging flange 422 and its end 423) of the adjuster 40. The adjuster main portion 41 and the end 423 of the hanging flange 422 of the adjuster 40 contact the front end or the rear end of the connector 30.

[0074] Note that the pedestal 60 and the connector 30 may have any configuration as long as they form the space portion SP. For example, the lower ends 33 of the pair of connector side portions 32 may be arranged outside the pair of second side portions 621 such that the inner surfaces of the pair of connector side portions 32 contact the second side portions 621. Also, for example, the lower ends 33 of the pair of connector side portions 32 may contact the upper surface of the overhanging portion 622 of the pedestal 60.

[0075] As shown in FIG. 9, on the upper surface of the second main portion 620 of the sub-pedestal 62, the power supply unit 66, wires 7 connected to the power supply unit 66, and other live parts of the lamp 6 are arranged. Also, on the upper surface of the second main portion 620, a second coupler 65 that engages with the first coupler 49 (see FIG. 2) fixed to the connector 30 is arranged.

[0076] The first main part 610 and the second main part 620 are configured to engage with each other. Hereinafter, the first main part 610 and the second main part 620 that constitute the central part in the lateral direction (arrow X direction) of the pedestal 60 may be referred to as the pedestal main part 600. Although not shown, a pedestal wiring hole for passing a wiring 720 (see FIG. 12) inside the luminaire that connects the power supply part 66 and the light source part 63 is formed in the pedestal main part 600. Further, in FIG. 9, second couplers 65 are respectively fixed to the front side portion and the rear side portion of the pedestal main part 600 with screws or the like.

[0077] As shown in FIG. 8, the pair of overhanging portions 622 of the sub-pedestal 62 extend beyond the end portions on both sides in the lateral direction (arrow X direction) of the main pedestal 61 to which the cover 64 is attached. Thereby, when the luminaire 6 is viewed from below, the overhanging portions 622 protruding outside the cover 64 prevent the structures above the pedestal 60, such as the main pedestal 61 and the power supply part 66 disposed thereon, from being visible. The shape and size of the overhanging portions 622 are determined such that a sufficient air return path can be ensured and the opening 22o for air-conditioning return provided in the appliance 2 can be covered.

[0078] Further, bent portions 623 bent upward are formed at the outer edge portions in the lateral direction (arrow X direction) of the pair of overhanging portions 622, that is, at the edge portions on both sides in the lateral direction (arrow X direction) of the pedestal 60, so that the operator can work safely.

[0079] 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 part 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 622 of the pedestal 60.

[0080] (Second coupler 65) As shown in FIGS. 9 and 2, the second coupler 65, together with the first coupler 49, constitutes a coupling mechanism for coupling the connector 30 and the lamp fixture 6. As shown in FIG. 9, the second coupler 65 is attached to the upper surface of the pedestal 60 and is a spring receiving fitting on which the first coupler 49 (see FIG. 2) fixed to the connector 30 is hooked. As shown in FIG. 2, the lamp fixture 6 is connected to the appliance 2 via the connection mechanism 3 by hooking the first coupler 49, which is a spring, on the second coupler 65 (spring receiver) thereof.

[0081] The second coupler 65 has a coupler main body 651 that engages with the first coupler 49 (see FIG. 4), a pair of coupler side portions 652, and a coupler fixing portion 653 fixed to the pedestal 60. The coupler main body 651 is a substantially rectangular plate-like member, and a coupler opening 654 into which the first coupler 49 (see FIG. 2) is inserted is formed in the coupler main body 651. The pair of coupler side portions 652 are plate-like members that extend in a direction substantially orthogonal to the coupler main body 651 from both end portions on both sides in the lateral direction (arrow X direction) of the coupler main body 651 and face each other. The coupler fixing portion 653 is a rectangular plate-like member that extends in a direction substantially orthogonal to the coupler main body 651 from the lower end of the coupler main body 651 and is fixed to the pedestal 60 by screws or the like.

[0082] In the example of FIG. 9, two second couplers 65 are provided for one lamp fixture 6 extending in the front-rear direction (arrow Y direction). One second coupler 65 is fixed to the front side portion of the upper surface of the pedestal 60, and the other second coupler 65 is fixed to the rear side portion of the upper surface of the pedestal 60. The second coupler 65 is disposed on the upper surface of the pedestal main body 600 of the pedestal 60 such that the extending direction of the pair of coupler side portions 652 coincides with the longitudinal direction (front-rear direction) of the pedestal 60, and the coupler main body 651 is disposed on the central side in the longitudinal direction of the pedestal 60. That is, with the second coupler 65 fixed to the pedestal 60, the coupler opening 654 is an opening that penetrates the coupler main body 651 in the front-rear direction (arrow Y direction).

[0083] (Cover 64) As shown in FIG. 11, 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. 8, the cover 64 has a translucent cover main body portion 640 that extends in the longitudinal direction (front-rear direction) of the lighting fixture 6 and covers the entire 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.

[0084] As shown in FIG. 11, the cover main body portion 640 has a translucent portion 641 whose cross-sectional shape with its longitudinal direction (front-rear direction) as the normal direction is convex downward (for example, curved), and a pair of engaging portions 642 that are provided so as to protrude upward at both ends in the short direction (lateral direction) of the translucent portion 641 and are hooked on the pedestal 60. The pair of engaging portions 642 of the cover main body portion 640 are, for example, in the shape of inwardly curved claw-like hooks. In FIG. 11, the engaging portion 642 is configured to be inserted into a recess 621s formed on the lower surface side of the second side portion 621 of the second pedestal when the cover 64 is attached to the pedestal 60 and hooked on the first side portion 611 of the main pedestal 61.

[0085] FIG. 13 is a diagram for explaining the gaps between members in the main part of the lighting device 1 according to Embodiment 1. The lighting device 1 is a lighting device corresponding to an air-conditioning return specification. As the air-conditioning equipment operates, the air in the lighting space SL of the lighting device 1 flows from the lower part of the housing portion 20 into the lighting fixture 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. 13, with reference to FIGS. 1, 5, 6, and 10, the configuration for air-conditioning return in the lighting device 1 will be described.

[0086] As shown in FIG. 13, the lateral width WL of the lighting fixture 6, that is, the lateral width of the sub-base 62 of the pedestal 60, is smaller than the lateral width WC of the lighting fixture arrangement portion 27 which is the space inside the housing portion 20, that is, the distance between the side surfaces 210 in the housing portion 20. Thus, the lateral width of the overhanging portion 622 of the sub-base 62 is predetermined. That is, in the lateral direction (arrow X direction), a gap G1 is formed between the lighting fixture 6 and the housing portion 20.

[0087] Also, the lateral width of the overhanging portion 622 is preferably such that the aperture 22o for air-conditioning return and the terminal block 47 protruding from the connector 30 are hidden by the sub-base 62. Specifically, as shown in FIG. 13, 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 of the sub-base 62 in the lateral direction (arrow X direction), the aperture 22o for air-conditioning return and the terminal block 47 on the top surface portion 22 are provided so as to fit. Thereby, the aperture 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.

[0088] Also, as shown in FIG. 13, 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. 6 and the connection mechanism attachment portion 24 of the housing portion 20. That is, this gap G2 in the vertical direction (arrow Z direction) has a size of about the difference (that is, H2 - H1) between the height dimension H2 of the connection portion 242 of the connection mechanism attachment portion 24 and the height dimension H1 of the adjuster main portion 41 of the adjuster 40. Also, as shown in FIGS. 3 and 13, the aperture 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 aperture 22o protrudes in the lateral direction (arrow X direction) from the connector main portion 31 in plan view.

[0089] 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 system ceiling CL (see FIG. 1), and the lighting device 1 can be used safely. Further, since the space portion SP in which the live parts 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. 10), 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 live part.

[0090] Further, as described with reference to FIG. 5, 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 connector main portion 31). With such a configuration, a sufficient air return path can be secured.

[0091] FIG. 14 is a diagram showing a renewal procedure of the lighting device 1 according to the first embodiment, and is a perspective view showing from below the state before the adjuster 40 is attached to the existing fixture after removing the lighting fixture before replacement. FIG. 15 is a diagram showing a renewal procedure of the lighting device 1 according to the first embodiment, and is a perspective view showing from below the state before the connector 30 provided with the terminal block 47 is attached to the fixture 2 to which the adjuster 40 is attached. FIG. 16 is a diagram showing a renewal procedure of the lighting device 1 according to the first embodiment, and is a perspective view showing from below the fixture 2 to which the adjuster 40 and the connector 30 are attached. FIG. 17 is a diagram showing a renewal procedure of the lighting device 1 according to the first embodiment, and is a perspective view showing from below the procedure of attaching the first coupler 49 to the fixture 2 to which the adjuster 40 and the connector 30 are attached. Hereinafter, for the sake of easy explanation, one housing portion 20 of the fixture 2 (see FIG. 2) will be described.

[0092] Based on FIGS. 3, 12, and 14 to 17, the procedure for renewal work will be described. Here, it is assumed that, among existing lighting devices equipped with conventional lighting fixtures that are straight tube lamps with bases (for example, fluorescent lamps or LED lamps), the existing fixture 2 is utilized as it is, and a light source integrated lighting fixture 6 using an LED or the like as a light source is mounted on the existing fixture 2 and used.

[0093] <Renewal construction> As shown in FIG. 14, the operator leaves the fixture 2 (hereinafter referred to as the housing part 20) in the existing lighting device, and removes unnecessary members such as the previous lamp (not shown) in advance.

[0094] (Procedure S1) First, the operator slides each of the pair of adjusters 40 from the outside to the inside in the front-rear direction (arrow Y direction) of the housing part 20. As a result, a pair of fixture locking parts 420 provided on the fixture mounting part 42 of the adjuster 40 hold the fixing part 240 of the connection mechanism mounting part 24 provided on the top surface part 22 of the housing part 20, and the adjuster 40 is temporarily held by the connection mechanism mounting part 24.

[0095] (Procedure S2) With the adjuster 40 temporarily held by the connection mechanism mounting part 24, the operator inserts the fixture 51 into the screw insertion hole 421 of the fixture mounting part 42 of the adjuster 40 and screws it into the screw hole 241 of the fixing part 240 of the connection mechanism mounting part 24. Thereby, the attachment of the adjuster 40 to the existing housing part 20 is completed.

[0096] (Procedure S3) Next, as shown in FIG. 15, the operator temporarily holds the connector 30 with respect to a pair of adjusters 40 attached to the existing housing portion 20. Specifically, the operator places the connector 30 between the main adjuster portions 41 of the pair of adjusters 40 with the main connector portion 31 facing upward. The operator inserts the adjuster locking portions 350 of the adjuster attachment portions 35 provided at the front end portion and the rear end portion of the main connector portion 31 into the first expansion portions P1 in the connector locking holes 430 of the front adjuster 40 and the rear adjuster 40. Then, the operator slides the connector 30 in the direction of the horizontal arrow B (see FIG. 16) so that the adjuster locking portion 350 is moved to the position of the second expansion portion P2 within each connector locking hole 430. As a result, as shown in FIG. 16, the connector 30 is temporarily held by the adjuster 40. As shown in FIG. 15, the terminal block 47 and the protector 48 are attached in advance to the connector 30 newly provided in the renewal construction.

[0097] (Procedure S4) As shown in FIG. 16, with the connector 30 temporarily held by the adjuster 40, the operator inserts the fixture 54 into the screw insertion hole 351 and screws it into the screw hole 431 formed in the connector attachment portion 43 of the adjuster 40. Thereby, the attachment of the connector 30 to the pair of adjusters 40 is completed.

[0098] (Procedure S5) Next, as shown in FIG. 17, the operator inserts the side of the first coupling tool 49 (spring) at the first coupling engagement portion 493 into the spring insertion hole 360 formed in the spring attachment portion 36 of the connector 30. In that state, the operator inserts the fixture 50 (screw) into the insertion hole 490 provided in the first coupling fixing portion 491 of the first coupling tool 49 and screws it into the screw hole 361 formed in the spring attachment portion 36 of the connector 30. Thereby, the attachment of the first coupling tool 49 to the connector 30 is completed.

[0099] Note that the first coupler 49 may be attached to the connector 30 in advance together with the terminal block 47 and the protector 48. That is, the procedure S5 may be performed before the procedure S3. Further, at least any one of the terminal block 47, the protector 48, and the first coupler 49 may be circulated together with the connector 30. For example, those shipped in an assembled state at a factory or the like may be used for renewal work.

[0100] (Procedure S6) Next, the operator temporarily attaches the lamp 6 to the connection mechanism 3 by hooking the second coupler 65 (spring receiver) provided on the lamp 6 to the first coupler 49 (spring) of the connector 30 fixed to the housing portion 20. In a state where the lamp 6 is temporarily attached to the connection mechanism 3, a gap is formed between the lower end portion 33 of the connector 30 and the pedestal 60 of the lamp 6 so that wiring work can be performed. Further, in a state where the lamp 6 is temporarily attached to the connection mechanism 3, a part or all of the lamp 6 is exposed downward from the lower opening of the housing portion 20.

[0101] The operator performs connection and wiring of the electric wire 7 in a state where the lamp 6 is temporarily attached to the connection mechanism 3. Specifically, first, as shown in FIG. 12, connection and wiring (wire arrangement) of the in-lamp power supply wire 720 and the between-lamp power supply wire 721 (see FIG. 3) arranged in the device 2 are performed. Next, connection and wiring (wire arrangement) of the lamp-side power supply wire 710 of the lamp 6 and the terminal-side power supply wire 711 of the connector 30 are performed. Next, connection and wiring (wire arrangement) of the external power supply wire 712 to the terminal block 47 provided on the connector 30 are performed.

[0102] (Procedure S7) After performing connection and wiring of the electric wire 7 in the procedure S6, the operator attaches the lamp 6 to the connection mechanism 3. As a result, the lamp 6 is accommodated in the lamp arrangement portion 27 in the housing portion 20. Thereafter, the operator arranges the light shield 29 below the lamp 6 and attaches it to the device 2. Further, the equipment plate 8 is attached to the device 2 to cover the equipment arrangement portion 28.

[0103] As described above, the adjusting tool 40 and the connection mechanism mounting portion 24 of the housing portion 20 are configured such that the adjusting tool 40 is temporarily held by the connection mechanism mounting portion 24 (see procedure S1). Therefore, until they are fixed to each other by the fixture 51 in procedure S2, the operator does not need to hold the adjusting tool 40 so that the adjusting tool 40 does not come off the housing portion 20. Thus, the operator can perform the construction work safely. Further, even if the fixture 51 comes off during use of the lighting device 1 by any chance, there is no risk that the adjusting tool 40 and members such as the connector 30 and the lamp unit 6 attached to the adjusting tool 40 come off the housing portion 20, so the user can use the lighting device 1 safely.

[0104] Also, as described above, the pair of adjusting tools 40 and the connector 30 are configured such that the adjusting tool locking portions 350 provided at the front end portion and the rear end portion of the connector 30 respectively engage with the connector locking holes 430 of the pair of adjusting tools 40 (see procedure S3). With such a configuration in which the connector 30 is temporarily held by the adjusting tool 40, until they are fixed to each other by the fixture 54 in procedure S4, the operator does not need to hold the connector 30 so that the connector 30 does not come off the adjusting tool 40 fixed to the housing portion 20. Thus, the operator can perform the construction work safely. Further, even if the fixture 54 comes off during use of the lighting device 1 by any chance, there is no risk that the connector 30 and members such as the lamp unit 6 attached to the connector 30 come off the housing portion 20 to which the adjusting tool 40 is attached, so the user can use the lighting device 1 safely.

[0105] As described above, the lighting device 1 is a lighting device to which power is supplied via an external power line 712. The lighting device 1 has a first housing part (for example, the housing part 20 on the right side in FIG. 3) in which an opening 22o for air-conditioning return is formed in the top surface part 22 and the lower surface is open, and includes an appliance 2 installed in ceiling equipment. Further, the lighting device 1 includes a first lamp unit (lamp unit 6 in FIG. 12) accommodated in the first housing part and having a first pedestal (pedestal 60), a first light source part (light source part 63) installed on the lower surface of the first pedestal, and a power supply part 66 installed on the upper surface of the first pedestal. Further, the lighting device 1 is interposed between the appliance 2 and the first lamp unit, is disposed above the first lamp unit in the first housing part, is attached to the first housing part, and has a first connection mechanism (right connection mechanism 3) to which the first lamp unit is detachably attached. And a terminal block 47 to which the external power line 712 is connected is installed in the first connection mechanism.

[0106] Thereby, it is possible to prevent an operator from forgetting to replace the terminal block 47 during renovation work, and it is possible to suppress a decrease in the reliability of the electrical connection part due to the existing terminal block being continuously used without being replaced.

[0107] Further, the first pedestal (pedestal 60 of the lamp unit 6 in FIG. 12) has an elongated shape extending in one direction in the horizontal direction (arrow Y direction). The first connection mechanism (connection mechanism 3) has a first connector (connector 30 in FIG. 12) having a cross section with an upwardly convex shape with one direction as the normal direction so as to form a space part SP in which the power supply part 66 is disposed between the first pedestal and the upper surface. A through hole 370 is formed in the first connector. The terminal block 47 is installed in the first connector such that a portion connected to the first lamp unit is disposed inside the first connector and a portion to which the external power line 712 is connected is exposed from the through hole 370.

[0108] Thereby, the power line 71 from the external power supply S to the power supply part 66 of the lamp unit 6 can be wired via the terminal block 47 installed in the connector 30. Therefore, the length of the external power line 712 is the same as that in the case where the terminal block 47 is provided on the appliance 2 side as in the conventional case, and the wiring work is not complicated.

[0109] Further, the first connection mechanism (connection mechanism 3) is attached to the first housing portion and has a pair of adjusters 40 to which the first connector (connector 30) is attached. The pair of adjusters 40 forms a gap G2 between the first connector and the top surface portion 22 of the first housing portion, and closes the space portion SP on both sides in one direction of the first connector.

[0110] In this way, the pair of adjusters 40 can form the gap G2 to secure the air-conditioning return path and prevent foreign matter from entering the space portion SP from both sides in the first direction of the first connector (connector 30).

[0111] The terminal block 47 is disposed inside the extension line of the straight line connecting the open end of the lower surface of the first housing portion and the end portion in the lateral direction (arrow X direction) of the first lighting fixture when viewed from one side in one direction (arrow Y direction) (see FIG. 13). Thereby, the terminal block 47 above the lighting fixture 6 cannot be visually recognized by the user, and the design property is improved.

[0112] Further, the lighting device 1 includes a second pedestal (pedestal 60) and a second lighting fixture (the left lighting fixture 6 in FIG. 2 and the lighting fixture 6x in FIG. 12) having a second light source portion (light source portion 63) installed on the lower surface of the second pedestal. Further, the lighting device 1 is interposed between the appliance 2 and the second lighting fixture (lighting fixture 6x), and includes a second connection mechanism (left connection mechanism 3) disposed above the second lighting fixture, and a second light source from the power supply portion 66 to the second lighting fixture. And an electric wire 7 (for example, an inter-luminaire power supply wire 721) for supplying lighting power. The appliance 2 has a second housing portion (left housing portion 20) in which the second lighting fixture and the second connection mechanism are housed, and the second connection mechanism is attached to the second housing portion and the second lighting fixture is detachably connected thereto. The first connection mechanism and the second connection mechanism are provided with wiring holes 38 into which the electric wire 7 is inserted.

[0113] Thereby, while maintaining the effect that the external power supply line 712 (for example, an F cable) can be of a length comparable to the conventional one, the power supply portions 66 of the lighting fixtures 6 and 6x can be shared. Therefore, even in the lighting device 1 including a plurality of lighting fixtures 6 and 6x, the structure can be simplified.

[0114] Embodiment 2 FIG. 18 is a perspective view of the connector 30a of the lighting device 1 according to Embodiment 2 as viewed from above. FIG. 19 is a perspective view of the adjuster 40a provided on the front side of the connector 30a in the lighting device 1 according to Embodiment 2 as viewed from above. FIG. 20 is a perspective view of the adjuster 40a provided on the rear side of the connector 30a in the lighting device 1 according to Embodiment 2 as viewed from above. FIG. 21 is a cross-sectional view showing a state before the connector 30a is attached to the adjuster 40a in the lighting device 1 according to Embodiment 2. In FIG. 21, the white arrow indicates the direction of movement of the connector 30a. FIG. 22 is a cross-sectional view showing a state during the fixing of the connector 30a to the adjuster 40a in the lighting device 1 according to Embodiment 2.

[0115] (Connector 30a) As shown in FIG. 18, also in Embodiment 2, the connector 30a is configured such that the cross-section with the front-rear direction (arrow Y direction) as the normal direction is convex upward, similar to the case of Embodiment 1, and a space portion SP is formed between the upper surface of the pedestal 60 of the lamp unit 6 (see FIG. 11).

[0116] Further, the connector 30a constituting the connection mechanism 3a is provided with a pair of spring attachment portions 36, a pair of adjuster attachment portions 35a, a terminal block installation portion 37, and a wiring hole 38, similar to the case of Embodiment 1. However, in the connector 30a of Embodiment 2, the configuration of the adjuster attachment portion 35a to which the adjuster 40a (see FIGS. 19 and 20) is attached is different from that of the case of Embodiment 1.

[0117] In Embodiment 2, in the adjuster attachment portion 35a, both the adjuster locking portion 350a that engages with the adjuster 40a and the screw insertion hole 351a into which the fixture 51 (see FIG. 2) for fixing the adjuster 40a is inserted are formed in each connector side portion 32a.

[0118] In Fig. 18, corresponding to the adjustment tools 40a being arranged at the front end and the rear end of the connector 30a respectively, an adjustment tool locking portion 350a and a screw insertion hole 351a are formed at the front end and the rear end of each connector side portion 32a respectively. At the front end and the rear end of each connector side portion 32a, the adjustment tool locking portion 350a and the screw insertion hole 351a are provided side by side in the front-rear direction (arrow Y direction). Specifically, the adjustment tool locking portion 350a and the screw insertion hole 351a are arranged such that the adjustment tool locking portion 350a is located more outward in the front-rear direction (arrow Y direction). In the adjustment tool mounting portion 35a, the main connector portion 31a has a flat surface.

[0119] (Adjustment tool 40a) As shown in Figs. 19 and 20, the adjustment tool 40a has, as in the case of the first embodiment, an instrument mounting portion 42a, a connector mounting portion 43a, and an adjustment tool main portion 41a connecting the instrument mounting portion 42a and the connector mounting portion 43a. However, in the adjustment tool 40a of the second embodiment, the configuration of the connector mounting portion 43a to which the connector 30a (see Fig. 18) is attached is different from that in the case of the first embodiment. Also, in the adjustment tool 40a of the second embodiment, the shape of the drooping flange 422a provided on the outer peripheral portion of the instrument mounting portion 42a excluding the portion where the adjustment tool main portion 41a is connected, and the shape of the adjustment tool main portion 41a are different from those in the case of the first embodiment.

[0120] Of the drooping flange 422a of the instrument mounting portion 42a, the flange side portions 422as on both sides in the lateral direction (arrow X direction) are inclined surfaces that gradually widen outward toward the lower end. Also, the end faces 41ae on both sides in the lateral direction (arrow X direction) of the adjustment tool main portion 41a are inclined so as to gradually widen outward toward the lower end, and the adjustment tool main portion 41a presents a trapezoidal shape when viewed from the front. As shown in Fig. 21, in the front view of the adjustment tool 40a, the flange side portion 422as of the instrument mounting portion 42a and the end face 41ae of the adjustment tool main portion 41a are provided to be continuous on the same straight line.

[0121] The connector attachment part 43a has a base part 44 which is a horizontal plane extending from the upper end of the adjuster main part 41a to the side opposite to the appliance attachment part 42a in the front-rear direction (arrow Y direction), and a pair of side parts 45 which extend downward from the edges on both sides in the lateral direction (arrow X direction) of the base part 44 while inclining so as to spread. In the connector attachment part 43a, a connector locking part 450a into which the adjuster locking part 350a of the connector 30a is inserted, and a screw hole 451a to which a fixture 54 for fixing the connector 30a to the connector attachment part 43a is screwed, are provided respectively on each of the pair of side parts 45 in the connector attachment part 43a.

[0122] In Embodiment 2, the adjuster locking part 350a of the connector 30a and the connector locking part 450a of the adjuster 40a which engage with each other, the adjuster locking part 350a is a substantially square through-hole penetrating the connector side part 32a so as to extend in the front-rear direction (arrow Y direction), and the connector locking part 450a is a semi-circular cut-up part which projects a part of the side part 45 inward. Note that the configurations of the adjuster locking part 350a and the connector locking part 450a are not limited to the above configurations, and any configurations that engage with each other may be used.

[0123] As shown in FIG. 21, when the connector 30a is attached to the adjuster 40a, the operator pushes up the connector 30a toward the adjuster 40a (that is, in the direction of the white arrow). Thereby, as shown in FIGS. 21 and 22, the connector locking part 450a (cut-up part) of the pair of side parts 45 of the connector attachment part 43a in the adjuster 40a and the adjuster locking part 350a (through-hole) of the pair of connector side parts 32a in the connector 30a engage with each other. In the state where the connector 30a is temporarily held by the adjuster 40a in this way, the operator inserts a fixture 54 for fixing the connector 30a to the connector attachment part 43a into the screw insertion hole 351a (see FIG. 18) of the connector 30a and screws it into the screw hole 451a of the connector attachment part 43a. Thereby, the connector 30a is attached to the adjuster 40a.

[0124] In the lighting device 1 of Embodiment 2, both ends in the front - rear direction (arrow Y direction) of the space SP formed between the pedestal 60 and the connector 30a are blocked by a pair of adjusters 40a. In particular, they are blocked by the adjuster main part 41a and the fixture mounting part 42a (including the hanging flange 422a) in each adjuster 40a.

[0125] As described above, in the lighting device 1 of Embodiment 2, although the structure of the adjuster 40a is different from that in Embodiment 1, the same effects as in Embodiment 1 can be obtained.

[0126] Embodiment 3. FIG. 23 is a circuit diagram showing the electrical circuit of the lighting device 1a according to Embodiment 3. Here, it is assumed that the external power supply line 712a branches and is connected to each main part. Therefore, in the lighting device 1a of Embodiment 3, each main part has a configuration having a terminal block 47, a power supply part 66, etc. In the lighting device 1a of Embodiment 3, the power - supply line 721 between the lighting fixtures and the wiring hole 38 of the connector 30 for passing through its end, which the lighting device 1 of Embodiment 1 has, are not required and thus are not provided. Also, since there is no wiring hole 38, the protector 48 is also not required.

[0127] That is, in the lighting device 1a of Embodiment 3, the first lighting fixture (the right - hand lighting fixture 6) and the second lighting fixture (the left - hand lighting fixture 6) each have a similar configuration having a power supply part 66, etc. Also, the first connector (the right - hand connector 30) and the second connector (the left - hand connector 30) each have a similar configuration with a terminal block 47 installed therein. And the power supply part 66 of the first lighting fixture supplies lighting power to the first light - source part, and the power supply part 66 of the second lighting fixture supplies lighting power to the second light - source part.

[0128] As described above, similar to the case of Embodiment 1, the lighting device 1a of Embodiment 3 includes the first connection mechanism (the right - hand connection mechanism 3) with the terminal block 47 installed, so it is possible to suppress a decrease in the reliability of the electrical connection part due to continued use without replacing the existing terminal block.

[0129] In addition, the lighting device 1a of Embodiment 3 includes a second pedestal (pedestal 60), a second light source unit (light source unit 63) installed on the lower surface of the second pedestal, and a second lamp (the left lamp 6 in FIG. 2) having a power supply unit 66 installed on the upper surface of the second pedestal and supplying lighting power to the second light source unit. Further, the lighting device 1a is interposed between the fixture and the second lamp, and includes a second connection mechanism (the left connection mechanism 3) disposed above the second lamp. A terminal block 47 to which an external power line 712a is connected is installed in the second connection mechanism. The fixture 2 has a second housing portion (the left housing portion 20) in which the second lamp and the second connection mechanism are housed, and the second connection mechanism is attached to the second housing portion, and the second lamp is detachably connected thereto.

[0130] Accordingly, in Embodiment 3, compared with the cases of Embodiments 1 and 2, by adding the power supply unit 66, the lighting device 1a corresponding to a higher output specification (brightness, etc.) can be provided. In addition, since the configurations of the two lamps 6 can be unified and the configurations of the two connection mechanisms 3 can be unified, component management for each main part becomes easier than in the case of Embodiment 1.

[0131] Embodiment 4. FIG. 24 is a circuit diagram showing the electrical circuit of the lighting device 1b according to Embodiment 4. The lighting device 1b of Embodiment 4 has a configuration in which each main part has a terminal block 47 and power supply units 66a, 66b, etc., similar to the case of Embodiment 3. However, in the lighting device 1b of Embodiment 4, the light source units 63b of the lamps 6b and 6c of each main part have a first light emitting element 630b and a second light emitting element 630c having different emission colors, and are configured to be able to control the color temperature of the illumination light.

[0132] The lighting device 1b is configured to be able to independently control the lighting of the first light emitting element 630b of the lamps 6b and 6c and the lighting of the second light emitting element 630c of the lamps 6b and 6c. Therefore, in the lighting device 1b of Embodiment 4, the configuration of the power supply line 72 is different from that in the case of Embodiment 3.

[0133] The power supply unit 66b of the lamp 6b supplies lighting power to the first light-emitting elements 630b of the lamp 6b and the lamp 6c. The first light-emitting element 630b of the lamp 6b and the first light-emitting element 630b of the lamp 6c are connected in series to the power supply unit 66b via the in-lamp power supply line 720b and the inter-lamp power supply line 721b. Also, the power supply unit 66c of the lamp 6c supplies lighting power to the second light-emitting elements 630c of the lamp 6b and the lamp 6c. The second light-emitting element 630c of the lamp 6c and the second light-emitting element 630c of the lamp 6b are connected in series to the power supply unit 66c via the in-lamp power supply line 720b and the inter-lamp power supply line 721b. The power supply unit 66b and the power supply unit 66c may each be of a specification corresponding to the light-emitting element to which the lighting power is supplied. Note that the power supply unit 66b and the power supply unit 66c may be of the same specification.

[0134] In the lighting device 1b of the fourth embodiment, the connector 30 of each main part is formed with a wiring hole 38 (see FIG. 10) for passing the end of the inter-lamp power supply line 721b, similar to the case of the first embodiment. Also, a protector 48 is provided in the wiring hole 38.

[0135] That is, also in the lighting device 1b of the fourth embodiment, similar to the case of the third embodiment, the first lamp (the right lamp 6b) and the second lamp (the left lamp 6c) each have a similar configuration having power supply units 66b, 66c, etc. Also, the first connector (the right connector 30) and the second connector (the left connector 30) each have a similar configuration with a terminal block 47 installed thereon. And in the lighting device 1b of the fourth embodiment, the power supply unit 66b of the first lamp (the lamp 6b) supplies lighting power to each first light-emitting element 630b of the first light source unit (the right light source unit 63b) and the second light source unit (the left light source unit 63b). Also, the power supply unit 66c of the second lamp (the lamp 6c) is configured to supply lighting power to each second light-emitting element 630c of the first light source unit (the right light source unit 63b) and the second light source unit (the left light source unit 63b).

[0136] As described above, similar to the case of Embodiment 1, the lighting device 1b of Embodiment 4 includes the first connection mechanism (the right connection mechanism 3) where the terminal block 47 is installed. Therefore, it is possible to suppress a decrease in the reliability of the electrical connection part due to continued use without replacing the existing terminal block.

[0137] Further, the lighting device 1b of Embodiment 4 includes a second pedestal (pedestal 60), a second light source part (light source part 63b) installed on the lower surface of the second pedestal, and a second lighting fixture (the left lighting fixture 6 in FIG. 2, the lighting fixture 6c in FIG. 24) having a power supply part 66c installed on the upper surface of the second pedestal. Also, the lighting device 1b is interposed between the fixture 2 and the second lighting fixture (lighting fixture 6c), and includes a second connection mechanism (the left connection mechanism 3) disposed above the second lighting fixture, and an electric wire 7 (for example, the power supply wire 721b between the lighting fixtures) that connects the first lighting fixture (lighting fixture 6b) and the second lighting fixture (lighting fixture 6c). A terminal block 47 to which the external power supply wire 712a is connected is installed in the second connection mechanism. The fixture 2 has a second housing part (the left housing part 20) that houses the second lighting fixture (lighting fixture 6c) and the second connection mechanism. The second connection mechanism is attached to the second housing part, and the second lighting fixture is detachably connected. And each of the first lighting fixture (lighting fixture 6b) and the second lighting fixture (lighting fixture 6c) has a first light emitting element 630b and a second light emitting element 630c with different emission colors. Wiring holes 38 into which the electric wire 7 (the power supply wire 721b between the lighting fixtures) is inserted are provided in the first connection mechanism and the second connection mechanism.

[0138] As described above, in the lighting device 1b of Embodiment 4, since each lighting fixture 6b, 6c has the first light emitting element 630b and the second light emitting element 630c, the color temperature of the illumination light can be adjusted by the lighting power from the power supply part 66b and the power supply part 66c. Therefore, the degree of freedom in scene creation is increased.

[0139] Also, in the lighting device 1b of Embodiment 4, similar to the case of Embodiment 3, the configurations of the two lighting fixtures 6b and 6c can be unified, and the configurations of the two connection mechanisms 3 can be unified.

[0140] Hereinafter, aspects of the present disclosure will be collectively described as appendices.

[0141] [Appendix 1] A lighting device to which power is supplied via an external power line, having a first housing portion formed with an opening for air-conditioning return on the top surface and having an open bottom surface, and being an appliance installed in ceiling equipment; a first lamp unit accommodated in the first housing portion, having a first pedestal, a first light source unit installed on the bottom surface of the first pedestal, and a power supply unit installed on the top surface of the first pedestal; a first connection mechanism interposed between the appliance and the first lamp unit, disposed above the first lamp unit in the first housing portion, attached to the first housing portion, and to which the first lamp unit is detachably connected. A terminal block to which the external power line is connected is installed in the first connection mechanism. Lighting device. [Appendix 2] The first pedestal has an elongated shape extending in one direction in the horizontal direction. The first connection mechanism has a first connector having a cross section with an upwardly convex shape with the one direction as the normal direction so as to form a space portion in which the power supply unit is disposed between the first connector and the top surface of the first pedestal. A through hole is formed in the first connector. The terminal block is installed in the first connector such that a portion connected to the first lamp unit is disposed within the first connector and a portion to which the external power line is connected is exposed from the through hole. The lighting device according to Appendix 1. [Appendix 3] The first connection mechanism has a pair of adjusters attached to the first housing portion and to which the first connector is attached. The pair of adjusters forms a gap between the first connector and the top surface of the first housing portion, and closes the space portion on both sides of the first connector in the one direction. The lighting device according to Appendix 2. [Appendix 4] When viewed from one side in the one direction, the terminal block is disposed inside an extension line of a straight line connecting an open end of the lower surface of the first housing portion and a lateral end portion of the first lighting fixture The lighting device according to appended claim 2 or appended claim 3 [Appended claim 5] A second pedestal, and a second lighting fixture having a second light source portion installed on a lower surface of the second pedestal A second connection mechanism that is interposed between the appliance and the second lighting fixture and is disposed above the second lighting fixture A wire for supplying lighting power of the second light source portion from the power supply unit to the second lighting fixture The appliance has a second housing portion in which the second lighting fixture and the second connection mechanism are accommodated The second connection mechanism is attached to the second housing portion, and the second lighting fixture is detachably connected thereto The first connection mechanism and the second connection mechanism are provided with wiring holes into which the wire is inserted The lighting device according to any one of appended claims 1 to appended claim 3 [Appended claim 6] A second pedestal, a second light source portion installed on a lower surface of the second pedestal, and a second lighting fixture having a power supply unit installed on an upper surface of the second pedestal and supplying lighting power to the second light source portion A second connection mechanism that is interposed between the appliance and the second lighting fixture and is disposed above the second lighting fixture A terminal block to which the external power line is connected is installed in the second connection mechanism The appliance has a second housing portion in which the second lighting fixture and the second connection mechanism are accommodated The second connection mechanism is attached to the second housing portion, and the second lighting fixture is detachably connected thereto The lighting device according to any one of appended claims 1 to appended claim 3 [Appended claim 7] A second pedestal, a second light source portion installed on a lower surface of the second pedestal, and a second lighting fixture having a power supply unit installed on an upper surface of the second pedestal Something interposed between the appliance and the second lighting fixture, and a second connection mechanism disposed above the second lighting fixture, an electric wire connecting the first lighting fixture and the second lighting fixture, a terminal block to which the external power supply line is connected is installed in the second connection mechanism, the appliance has a second housing portion in which the second lighting fixture and the second connection mechanism are housed, the second connection mechanism is attached to the second housing portion, and the second lighting fixture is detachably connected thereto, each of the first lighting fixture and the second lighting fixture has a first light-emitting element and a second light-emitting element with different emission colors, a wiring hole into which the electric wire is inserted is provided in the first connection mechanism and the second connection mechanism The lighting device according to any one of Appendices 1 to 3.

Explanation of Signs

[0142] 1 Lighting device, 1a Lighting device, 1b Lighting device, 2 Appliance, 3 Connection mechanism, 3a Connection mechanism, 6 Lamp, 6b Lamp, 6c Lamp, 6x Lamp, 7 Electric wire, 8 Equipment plate, 9 Support member, 20 Housing part, 21 Side face part, 21f Flange, 22 Top face 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, 30a Connector, 30x Connector, 31 Connector main part, 31a Connector main part, 32 Connector side part, 32a Connector side part, 33 Lower end part, 34 Vent hole, 35 Adjusting tool mounting part, 35a Adjusting tool mounting part, 36 Spring mounting part, 37 Terminal block installation part, 38 Wiring hole, 40 Adjusting tool, 40a Adjusting tool, 41 Adjusting tool main part, 41a Adjusting tool main part, 41ae End face, 42 Appliance mounting part, 42a Appliance mounting part, 43 Connector mounting part, 43a Connector mounting part, 44 Base part, 45 Side part, 47 Terminal block, 48 Protector, 49 First coupling tool, 50 Fixture, 51 Fixture, 53 Fixture, 54 Fixture, 60 Base, 61 Main base, 62 Sub-base, 63 Light source part, 63b Light source part, 64 Cover, 65 Second coupling tool, 66 Power supply part, 66a Power supply part, 66b Power supply part, 66c Power supply part, 71 Power cord, 72 Feeding wire, 210 Side face part, 240 Fixed part, 241 Screw hole, 242 Connection part, 251 Left cover part, 252 Right cover part, 253 Cover connection part, 254 Cover flange part, 350 Adjusting tool locking part, 350a Adjusting tool locking part, 351 Screw insertion hole, 351a Screw insertion hole, 360 Spring insertion part, 361 Screw hole, 370 Through hole, 371 Screw hole, 420 Appliance locking part, 421 Screw insertion hole, 422 Hanging flange, 422a Hanging flange, 422as Flange side part, 423 End part, 430 Connector locking hole, 431 Screw hole, 450a Connector locking part, 451a Screw hole, 490 Insertion hole, 491 First coupling fixing part, 492 First coupling deformation part, 493 First coupling engaging part, 600 Base main part, 610 First main part, 611 First side part, 620 Second main part, 621 Second side part, 621s Recess, 622 Protruding part, 623 Bent part, 630b First light emitting element, 630c Second light emitting element, 631 Substrate, 640 Cover main body part, 641 Translucent part, 642 Engaging part, 645 Cover end part, 651 Coupling tool main part, 652Side of the connector, 653 Connector fixing part, 654 Connector opening, 710 Power supply wire on the lamp side, 711 Power supply wire on the terminal side, 712 External power supply wire, 712a External power supply wire, 720 Power supply wire inside the lamp, 720b Power supply wire inside the lamp, 721 Power supply wire between lamps, 721b Power supply wire between lamps, C1 Connection part, C2 Connection part, CL System ceiling, G1 Gap, G2 Gap, H1 Height dimension, H2 Height dimension, P1 First extension part, P2 Second extension part, S External power supply, SL Lighting space, SP Space part, SPx Space part, VL Center line, WC Width, WL Width.

Claims

1. A lighting device to which power is supplied via an external power cord, having a first housing portion formed with an opening for air-conditioning return on the top surface and having an open bottom surface, and being an appliance installed in ceiling equipment; a first lamp unit accommodated in the first housing portion and having a first pedestal, a first light source unit installed on the bottom surface of the first pedestal, and a power supply unit installed on the top surface of the first pedestal; a first connection mechanism interposed between the appliance and the first lamp unit, disposed above the first lamp unit in the first housing portion, attached to the first housing portion, and to which the first lamp unit is detachably connected; wherein a terminal block to which the external power cord is connected is installed in the first connection mechanism lighting device.

2. The first pedestal has an elongated shape extending in one direction in the horizontal direction, the first connection mechanism has a first connector having a cross section convex upward with the one direction as the normal direction so as to form a space portion in which the power supply unit is disposed between the first connection mechanism and the top surface of the first pedestal, a through hole is formed in the first connector, the terminal block is installed in the first connector such that a portion connected to the first lamp unit is disposed within the first connector and a portion to which the external power cord is connected is exposed from the through hole The lighting device according to claim 1.

3. The first connection mechanism has a pair of adjusters attached to the first housing portion and to which the first connector is attached, the pair of adjusters form a gap between the first connector and the top surface of the first housing portion, and close the space portion on both sides of the first connector in the one direction The lighting device according to claim 2.

4. The terminal block is disposed inside an extension line of a straight line connecting an open end of the bottom surface of the first housing portion and a lateral end of the first lamp unit when viewed from one side in the one direction The lighting device according to claim 2 or claim 3.

5. a second lamp unit having a second pedestal and a second light source unit installed on the bottom surface of the second pedestal; a second connection mechanism interposed between the appliance and the second lamp unit and disposed above the second lamp unit; a wire for supplying lighting power of the second light source unit from the power supply unit to the second lamp unit; the appliance has a second housing portion in which the second lamp unit and the second connection mechanism are accommodated, the second connection mechanism is attached to the second housing portion and the second lamp unit is detachably connected thereto The first connection mechanism and the second connection mechanism are provided with wiring holes into which the electric wire is inserted. The lighting device according to any one of claims 1 to 3.

6. A second pedestal, a second light source unit installed on the lower surface of the second pedestal, and a second lighting fixture having a power supply unit installed on the upper surface of the second pedestal and supplying lighting power to the second light source unit; An object interposed between the appliance and the second lighting fixture, and a second connection mechanism disposed above the second lighting fixture. The second connection mechanism is provided with a terminal block to which the external power supply line is connected. The appliance has a second housing portion in which the second lighting fixture and the second connection mechanism are accommodated. The second connection mechanism is attached to the second housing portion, and the second lighting fixture is detachably connected thereto. The lighting device according to any one of claims 1 to 3.

7. A second pedestal, a second light source unit installed on the lower surface of the second pedestal, and a second lighting fixture having a power supply unit installed on the upper surface of the second pedestal; An object interposed between the appliance and the second lighting fixture, and a second connection mechanism disposed above the second lighting fixture; An electric wire connecting the first lighting fixture and the second lighting fixture. The second connection mechanism is provided with a terminal block to which the external power supply line is connected. The appliance has a second housing portion in which the second lighting fixture and the second connection mechanism are accommodated. The second connection mechanism is attached to the second housing portion, and the second lighting fixture is detachably connected thereto. Each of the first lighting fixture and the second lighting fixture has a first light emitting element and a second light emitting element having different emission colors. The first connection mechanism and the second connection mechanism are provided with wiring holes into which the electric wire is inserted. The lighting device according to any one of claims 1 to 3.

Images