Lighting device

Abstract

To provide a lighting device in which a lighting fixture is replaceably attached to equipment installed in a ceiling facility, and an air conditioning return specification can be maintained easily.SOLUTION: A lighting device includes: equipment installed in a ceiling facility, whose undersurface is opened, and which is formed with an opening for an air conditioning return on the top face; a lighting fixture arranged in the equipment, which includes a pedestal extending in a first horizontal direction, a power supply device installed on the top face of the pedestal, a light source part provided below the pedestal, and a translucent part for covering the light source part; a connection tool to which the lighting fixture is detachably attached, which covers the power supply device installed on the top face of the pedestal; and a connection mechanism for connecting the lighting fixture to the connection tool. The connection tool includes a connection tool main part in which a cross section with the first direction as a normal direction is formed in an upwardly convex shape so that a space part is formed for arranging the power supply device on the top face of the pedestal. In a second direction, which is a horizontal direction, and is orthogonal to the first direction, the opening for the air conditioning return is provided up to the outside of both end parts in the second direction on the top face of the connection tool main part.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present disclosure relates to a lighting device including a lamp that can be separated from a fixture. [Background technology]

[0002] There is known a lighting device that is provided with a lamp that can be separated from the fixture and is compatible with a renewal construction for replacing the lamp (see, for example, Patent Document 1). Patent Document 1 discloses a lighting device that includes a renewal reflector that is attached to the back side of an existing fixture attached to a ceiling, and a renewal lamp (a light source unit in Patent Document 1). In the lighting device of Patent Document 1, the reflector is box-shaped with an open bottom and has a width larger than the width of the fixture and the width of the lamp. The lamp is disposed inside the box-shaped reflector. In addition, in the lighting device of Patent Document 1, the chassis of the components that make up the lamp is fixed to the reflector, and the light source unit having a light-emitting element of the components that make up the lamp is configured to be detachably attached to the chassis. That is, a connection mechanism (a spring and a spring receiver) is provided between the chassis part and the light source unit part of the lamp, and they are connected to each other.

[0003] Generally, in a lighting device installed on a grid ceiling, a lamp is disposed inside a fixture installed in the ceiling fixture, and an opening for air conditioning return is formed in the top surface of the fixture. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-125319 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the reflector and the lamp for newer lights disclosed in Patent Document 1 are arranged inside the fixture of the grid ceiling lighting device, the upper surface of the reflector, which has a width larger than that of the lamp, is arranged on the top surface side of the fixture. Therefore, most or all of the opening for the air conditioning return is blocked by the upper surface of the reflector, which can make it difficult to arrange it to meet the required specifications for the air conditioning return.

[0006] The present disclosure has been made to solve the above-mentioned problems, and provides a lighting device in which a lamp is attached to a fixture installed in a ceiling fixture, the lamp is replaceable, and the air conditioning return specifications can be easily maintained. [Means for solving the problem]

[0007] The lighting device according to the present disclosure includes a fixture that is installed in a ceiling fixture and has an opening on the bottom surface thereof for returning air conditioning therefrom and an opening on the top surface thereof, a lamp that is arranged on the fixture and has a base extending in a first horizontal direction, a power supply unit arranged on the top surface of the base, a light source unit arranged on the underside of the base, and a light-transmitting unit that covers the light source unit, and a connector that is arranged between the fixture and the lamp and that is attached to the fixture and covers the power supply unit arranged on the top surface of the base, a first coupling device that is provided on the connector, and the lamp. and a connecting mechanism for connecting the lamp to the connector by engagement of the first connector and the second connector, wherein the connector has a connector main part whose cross section, normal to the first direction, is convex upwardly so as to form a space in which the power supply unit is disposed between the connector main part and the upper surface of the base, and in a second direction which is the horizontal direction and perpendicular to the first direction, the opening for the air conditioning return is provided outside both ends in the second direction on the upper surface of the connector main part. Effect of the Invention

[0008] The lighting device according to the present disclosure includes a connector, a coupling mechanism is provided between the connector and the lamp, the connector has a connector main part whose cross section normal to the first direction is convex upward so as to form a space between the connector and the upper surface of the base in which the power supply device is disposed, and in the second direction, an opening for air conditioning return is provided outside both ends of the upper surface of the connector main part. This makes it easy to maintain the air conditioning return specification in a lighting device in which the lamp can be replaced. [Brief description of the drawings]

[0009] [Figure 1] 1 is an external perspective view showing an illumination device according to a first embodiment. [Diagram 2] FIG. 2 is an exploded perspective view showing the lighting device of FIG. [Diagram 3] FIG. 3 is a perspective view of the device of FIG. 2 as seen from above. [Figure 4] 3 is an exploded perspective view showing a state before a first coupling tool is fixed to the connector of FIG. 2. FIG. [Diagram 5] 5 is a perspective view of the connector of FIG. 4 as seen from above. [Figure 6] FIG. 6 is a cross-sectional view showing the connector of FIG. 5. [Figure 7] FIG. 3 is an enlarged perspective view showing the lamp of FIG. 2. [Figure 8] 8 is a perspective view of the lamp of FIG. 7 as seen from above. [Figure 9] 9 is an exploded perspective view of a base and a second connector in the lamp of FIG. 8. FIG. [Figure 10] 2 is a cross-sectional view showing a main part of the lighting device of FIG. 1. [Figure 11] 9 is a partial enlarged view showing a second connector and its surrounding area in the lamp of FIG. 8. [Figure 12] 10 is an enlarged perspective view showing a second connector on the right side of FIG. 9. FIG. [Figure 13] 13 is a perspective view of the second connector of FIG. 12 as viewed from below. [Figure 14] 4A to 4C are diagrams illustrating gaps between components in a main part of the lighting device according to the first embodiment. [Figure 15]15 is a top view showing a main part of the lighting device of FIG. 14. [Figure 16] FIG. 10 is a cross-sectional view showing a state in which the connector and the first coupling device are fixed to the fixture, illustrating a process for assembling the lighting device according to the first embodiment. [Figure 17] FIG. 2 is a cross-sectional view showing a state in which a lamp is attached to a fixture by a linking mechanism and a connector, illustrating an assembly process for the lighting device according to the first embodiment. [Figure 18] FIG. 11 is a cross-sectional view showing a configuration example of a connector according to a first modified example, in which the inclination angle of a pair of connector side portions is an obtuse angle. [Figure 19] FIG. 11 is a cross-sectional view showing a configuration example of a connector according to a first modified example, in which the inclination angle of a pair of connector side portions is a right angle. [Figure 20] FIG. 11 is a cross-sectional view showing a state before the connector and the first coupling are fixed to the existing fixture after the existing lighting fixture has been removed, showing a procedure for renewing the lighting device in accordance with embodiment 2. [Figure 21] FIG. 11 is a cross-sectional view showing a state in which a replaced lighting fixture is attached to an existing fixture via a connecting mechanism and a connector, illustrating a procedure for renewing a lighting device according to a second embodiment. [Figure 22] FIG. 11 is a cross-sectional view showing the renewal procedure for the lighting device according to the second embodiment, showing the state after the renewal work has been completed. [Figure 23] FIG. 11 is a perspective view of a connection mechanism according to a second modified example, as viewed from above. [Figure 24] FIG. 24 is an exploded perspective view showing the connection mechanism of FIG. 23. [Diagram 25] 25 is a perspective view showing an adjustment tool in the connection mechanism of FIG. 24. [Figure 26] 24 is a perspective view showing a state in which a first coupler is attached to the connection mechanism of FIG. 23, as viewed from below. [Figure 27] 11 is a cross-sectional view showing a main part of an illumination device according to embodiment 3. FIG. [Figure 28] 28 is an exploded perspective view of a connector, a first coupling device, and a lamp in the lighting device of FIG. 27. [Figure 29]29 is a perspective view showing the connector in FIG. 28 to which a first coupling tool is attached, as viewed from above. [Diagram 30] FIG. 30 is a cross-sectional view showing the connector of FIG. 29. [Diagram 31] FIG. 13 is an external perspective view of a lighting device of a comparative example. [Diagram 32] FIG. 32 is an exploded perspective view of the lighting device of the comparative example shown in FIG. 31. [Diagram 33] FIG. 13 is a cross-sectional view showing a state in which the connector and the first coupling device are fixed to the fixture, illustrating a process for assembling the lighting device according to the third embodiment. [Diagram 34] FIG. 11 is a cross-sectional view showing a state in which a light fixture is attached to the fixture by a linking mechanism and a connector, and a light blocking device is attached to an opening of the fixture, in accordance with a process for assembling a lighting device according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment 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 to the embodiment described below. In addition, in the following drawings, including FIG. 1, the relationship between the sizes of each component or each component may differ from the actual one. In the following description, terms indicating directions are used as appropriate to facilitate understanding, but these terms are for the purpose of explanation and do not limit the present disclosure. Examples of terms indicating directions include "up", "down", "right", "left", "front" and "rear".

[0011] Embodiment 1 FIG. 1 is an external perspective view showing a lighting device 1 according to the first embodiment. As shown in FIG. 1, the lighting device 1 is attached to a support member 9 provided on a mounting portion, for example. The mounting portion is a ceiling, for example. The support member 9 is a bar member called a T-bar, a channel member, or other ceiling equipment. In the first embodiment, a plurality of support members 9 are arranged in a lattice shape on the mounting portion, and the lighting device 1 is fitted into a ceiling opening surrounded by four of the support members 9 arranged in a square shape. This forms a system ceiling S (grid-type system ceiling). The lighting device 1 includes a fixture 2 attached to the support member 9 and two lighting fixtures 6 attached to the fixture 2. The lighting fixtures 6 are so-called light source units. The two lighting fixtures 6 are arranged at an interval from each other, and a fixture plate 8 is provided between the two lighting fixtures 6. In addition, a light shielding device 7 such as a louver is provided below each lighting fixture 6.

[0012] FIG. 2 is an exploded perspective view showing the lighting device 1 of FIG. 1. In FIG. 2, only the part of the lighting device 1 to the left of the equipment plate 8 is shown in an exploded state, but the right part has the same configuration as the left part. As shown in FIG. 2, the lighting device 1 according to the first embodiment includes a device 2, two lighting fixtures 6, a connector 30 fixed to the device 2 and to which the lighting fixtures 6 are attached, a light shielding device 7 arranged on the light irradiation side of each lighting fixture 6, and an equipment plate 8 arranged between the two lighting fixtures 6. In addition, the lighting device 1 includes a connecting mechanism that connects the connector 30 and the lighting fixtures 6. The connecting mechanism is composed of a first connecting device 4 provided on the connector 30 and a second connecting device 63 provided on the lighting fixture 6. In the following, the first connecting device 4 provided on the connector 30 is defined as a spring such as a leaf spring, and the second connecting device 63 provided on the lighting fixture 6 is defined as a spring receiver.

[0013] The configuration of the lighting device 1 is not limited to the above configuration. For example, the fixture 2 does not have to be a component of the lighting device 1, and the lighting device 1 including the connector 30 and the luminaire 6 may be attached to a fixture of an existing facility. For example, in FIG. 2, the lighting device 1 includes two luminaires 6 and the same number of connectors 30 and shading devices 7 as the luminaires 6, but the number of the luminaires 6, the connectors 30, and the shading devices 7 may be one or three or more. For example, the shading device 7 may be a structure other than a louver, or may be omitted. For example, the connecting mechanism may be such that the first connecting device 4 on which the connecting device 30 is provided is a spring receiver, and the second connecting device 63 on the luminaire 6 is a spring. The connecting mechanism may be any configuration that connects the connecting device 30 and the luminaire 6, and is not limited to a combination of a spring and a spring receiver. Furthermore, one or more than two sets of coupling mechanisms for coupling the connector 30 and the lighting fixture 6 may be provided, and when multiple sets of coupling mechanisms are provided, different types of coupling mechanisms may be used.

[0014] (Apparatus 2) FIG. 3 is a perspective view of the fixture 2 of FIG. 2 seen from above. The fixture 2 has the same size as the ceiling opening of the system ceiling S (see FIG. 1) and has a frame-shaped outer shell. In detail, the fixture 2 has two side parts 21 constituting the left and right sides, two cover parts 24 constituting the front and rear sides, and two top parts 22 constituting the left and right upper surfaces, respectively. The fixture 2 also has two partition plates 23 facing each other between the two side parts 21. That is, in the left and right parts of the fixture 2, a housing part 20 is formed by the side parts 21, the partition plate 23, and the top part 22 connecting the upper ends of these parts. The front ends of the two housing parts 20 are covered by the front cover part 24, and the rear ends of the two housing parts 20 are covered by the rear cover part 24.

[0015] (Side portion 21, lid portion 24) The side portion 21 is a plate-like member extending in the front-rear direction (arrow Y direction). The two side portions 21 are disposed opposite each other. The cover body portion 24 is a plate-like member extending in the lateral direction (arrow X direction). The two cover bodies 24 are also disposed opposite each other. The two side portions 21 and the two cover bodies 24 form a rectangular frame. A flange 21f extending outward is provided at the lower end of the side portion 21.

[0016] (Partition 23) In the front-rear direction (arrow Y direction), the two partition plates 23 have the same length as the side surface portions 21, and divide the inside of the rectangular frame formed by the two side surface portions 21 and the two cover portions 24 into three spaces in the horizontal direction. As shown in Figs. 2 and 3, the spaces on both ends, i.e., the spaces inside each housing portion 20, are lamp arrangement portions 27, and the space between the two lamp arrangement portions 27 is an equipment housing portion 28. The lamp arrangement portion 27 houses the lamps 6 and the like, and the equipment housing portion 28 houses equipment parts (not shown) such as a speaker or an emergency light.

[0017] (Top section 22) 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 to each other in the horizontal direction (arrow X direction), and connects the upper ends of the left portions of the two cover bodies 24 to each other 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 to each other in the horizontal direction (arrow X direction), and connects the upper ends of the right portions of the two cover bodies 24 to each other in the front-rear direction (arrow Y direction). When the lighting device 1 is attached to the attachment portion, the two top surface portions 22 face the attachment portion.

[0018] An opening 22o for air conditioning return is formed in the top surface 22. The lighting device 1 is configured to satisfy predetermined air conditioning return specifications. The size of the opening 22o for air conditioning return and the air conditioning return specifications will be described later.

[0019] Further, an instrument fixing device 25 for fixing the instrument 2 is provided at each of the left and right end portions of the cover body 24. The instrument fixing device 25 is, for example, a mounting metal fitting that is screwed to the cover body 24 of the instrument 2 and has a claw at its tip that hooks onto the support member 9 (see FIG. 1). Further, the instrument 2 is provided with a terminal block 26. In the example of FIG. 3, the terminal block 26 is installed on the side of the equipment housing section 28 of the front cover body 24 of the two cover bodies 24. The terminal block 26 connects an external power source to a power supply unit 64 (see FIG. 8 described later).

[0020] (1st connector 4) Fig. 4 is an exploded perspective view showing a state before the first coupling device 4 is fixed to the connector 30 in Fig. 2. As shown in Fig. 4, the first coupling device 4 is fixed to the connector 30 and the device 2 (see Fig. 3) using a fastener 5. In the following, the fastener 5 is defined as being composed of a screw 50 and a nut 51 (see Fig. 16 described later).

[0021] The first connector 4 is a longitudinal spring made of an elastic material such as stainless steel or spring steel plate. The first connector 4 has a first fixed connection portion 40 fixed to the connector 30, a first deformed connection portion 41 elastically deformed by a load, and a first engagement portion 42 engaging with the second connector 63 of the lamp 6. The first fixed connection portion 40 is a flat plate-shaped member, and a screw insertion hole 400 for inserting the screw 50 is provided in the first fixed connection portion 40. The first deformed connection portion 41 is a belt-shaped member extending in the longitudinal direction of the first connector 4, and has, for example, a curved portion and a bent portion, and is elastic, and is connected to the first fixed connection portion 40. The first deformed connection portion 41 is subjected to a force that returns it to the upward direction by bending downward. The first engagement portion 42 is connected to the tip of the first deformed connection portion 41, and is a member that engages with the second connector 63 of the lamp 6. The first engagement portion 42 is, for example, key-shaped. The first connecting engagement portion 42 of the first connecting device 4, which is fixed to the connecting device 30 and the fixture 2 by the screw 50, engages with the second connecting device 63 of the lighting fixture 6 (see Figure 2), thereby attaching the lighting fixture 6 to the fixture 2 via the connecting device 30.

[0022] As shown in FIG. 4, one or more first coupling members 4 are provided for each connector 30. In the example of FIG. 4, two first coupling members 4 are provided for one connector 30 extending in the front-rear direction. One first coupling member 4 is fixed to the front part of the connector 30 (particularly, the front part of the connector upper part 34 shown in FIG. 5 described later), and the other first coupling member 4 is fixed to the rear part of the connector 30 (particularly, the rear part of the connector upper part 34 shown in FIG. 5). The first coupling member 4 is fixed to the connector 30 so that its longitudinal direction is the longitudinal direction (front-rear direction) of the connector 30, and the first coupling fixing part 40 is arranged at the center side of the longitudinal direction of the connector 30, and the first coupling engagement part 42 is arranged at the end side of the longitudinal direction of the connector 30.

[0023] (Connector 30) Fig. 5 is a perspective view of the connector 30 of Fig. 4, seen from above. Fig. 6 is a cross-sectional view showing the connector 30 of Fig. 5. As shown in Fig. 4, the connector 30 is a connection mechanism 3 that connects the fixture 2 (see Fig. 2) and the first coupling device 4. The connector 30 has an elongated shape extending in the front-rear direction, and is accommodated in the lamp arrangement section 27 of the fixture 2 (see Fig. 2) in a state where it is fixed to the fixture 2 by the fixing device 5.

[0024] 4, 5 and 6, the connector 30 has a connector main part 31 whose cross section, normal to the front-rear direction (arrow Y direction), is convex upward so as to form a space SP (see FIG. 10 described later) in which a power supply unit 64 and the like are disposed between the connector 30 and the upper surface of the base 60 of the lamp 6. As shown in FIG. 2, in the first embodiment, the connector 30 is constituted by the connector main part 31, and has a width in the horizontal direction (arrow X direction) smaller than that of the base 60.

[0025] As shown in Fig. 5 and Fig. 6, the connector 30 has a connector upper part 34 that faces the top surface part 22 (see Fig. 3) of the device 2 when attached to the device 2 (see Fig. 2), and a pair of connector side parts 32 arranged on both sides of the connector upper part 34 along the longitudinal direction of the connector upper part 34. The connector upper part 34 and the pair of connector side parts 32 each have a generally flat plate shape. The connector 30 (connector main part 31) has a concave shape with the lower ends of the pair of connector side parts 32 open. The pair of connector side parts 32 are inclined so as to gradually narrow from the lower end toward the upper end (the side of the connector upper part 34).

[0026] The lower ends of the pair of connector side parts 32, i.e., the ends on both sides in the lateral direction (arrow X direction) of the connector main part 31, are in contact with the upper surface (see FIG. 2) of the base 60 of the lamp 6. As a result, the connector main part 31 covers live parts (charging parts) such as the power supply device 64 and the electric wires connected to the power supply device 64, which are installed on the upper surface of the base 60.

[0027] 6, the pair of connector side portions 32 are bent vertically midway so that their lower sides are substantially parallel to each other, and each lower end portion 33 is curled inward. Each lower end portion 33 of the pair of connector side portions 32 can be formed, for example, by a curling process in which the lower end portion 33 is folded back inward. Note that the lower end portions 33 of the pair of connector side portions 32 may be configured so that the tip of the plate-like member of the connector 30 is in contact with the upper surface of the base 60 without being folded back inward.

[0028] As shown in FIG. 5, the connector upper part 34 is provided with a spring attachment part 310 for attaching the first coupling 4 (see FIG. 4). In FIG. 4, the spring attachment part 310 is formed by cutting and raising a part of the connector upper part 34, and is composed of a spring insertion part 311 into which the first coupling fixing part 40 (see FIG. 4) is inserted, and a screw insertion hole 312 into which a screw 50 (see FIG. 4) for fixing the first coupling 4 is inserted. The structure, number and position of the spring attachment part 310 are provided in accordance with the type (i.e., structure), number and position of the coupling mechanism. In the example of FIG. 4, the first coupling 4 is disposed at the front part and the rear part of the connector upper part 34, so that the spring attachment part 310 is formed at the front part and the rear part of the connector upper part 34.

[0029] (Lighting 6) FIG. 7 is an enlarged perspective view showing the lamp 6 in FIG. 2. In FIG. 7, the structure inside the cover 62 of a part of the lamp 6 is shown. FIG. 8 is a perspective view showing the lamp 6 in FIG. 7 from above. FIG. 9 is an exploded perspective view of the base 60 and the second connector 63 in the lamp 6 in FIG. 8. FIG. 10 is a cross-sectional view showing the main part of the lighting device 1 in FIG. 1. The main part of the lighting device 1 is a structural part in which the housing part 20 (see FIG. 2), the connector 30 attached to the housing part 20, the lamp 6, and the light blocking device 7 are integrated into one unit. FIG. 11 is a partially enlarged view showing the second connector 63 and its surroundings in the lamp 6 in FIG. 8. The configuration of the lamp 6 will be described with reference to FIG. 2, and FIGS. 7 to 11.

[0030] 2, the lighting fixture 6 has an elongated shape extending in the front-rear direction (arrow Y direction) and is housed in the lighting fixture arrangement section 27 of the device 2 together with the connector 30. Hereinafter, the front-rear direction, which is a horizontal direction and is the longitudinal direction of the lighting fixture 6, may be referred to as a first direction, and the left-right direction (arrow X direction), which is a horizontal direction and perpendicular to the first direction (front-rear direction), may be referred to as a second direction.

[0031] As shown in Figs. 7 and 8, the lamp 6 is a light source unit that irradiates light to an irradiation target area by power supplied from an external power source (not shown). As shown in Fig. 8, the lamp 6 has a base 60 that is a base plate, a light source unit 61 (see Fig. 10) that is installed on the base 60, a light-transmitting cover 62 (see Fig. 7) that covers the light source unit 61, and a second connector 63. The lamp 6 also has a power supply unit 64, a power supply line 66 that connects the light source unit 61 and the power supply unit 64, and a holder 69 that holds the power supply line 66. The lamp 6 also has a control device 68 that receives a control command from outside the lighting device 1 and controls the output of the power supply unit 64 based on the control command. Note that the control device 68 is not an essential component that configures the lighting device 1 of the present disclosure.

[0032] (Light source section 61) 10, the light source unit 61 is, for example, a light source that emits light, such as LEDs (Light Emitting Diodes) that are arranged in the longitudinal direction and mounted on a substrate 610, and is attached to the lower surface of a base 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.

[0033] (Power supply 64) As shown in FIG. 8, the power supply device 64 is attached to the other surface (top surface) of the base 60, and converts the power supplied from an external power source to light the light source unit 61.

[0034] (Pedestal 60) As shown in FIG. 8, the base 60 is a plate-shaped metal member extending in the front-rear direction, and is provided parallel to the top surface portion 22 in a state in which the lighting device 6 is attached to the device 2 via the connector 30 as shown in FIG. 10. More specifically, as shown in FIG. 9, the base 60 has a rectangular shape, and is arranged so that the long side is along the front-rear direction and the short side is along the horizontal direction. The base 60 has a rectangular arrangement portion 600 extending in the front-rear direction and a protruding portion 603 extending from both ends of the arrangement portion 600 in the horizontal direction. In other words, the base 60 has the arrangement portion 600 constituting the horizontal center portion of the base 60, and the protruding portion 603 constituting the left and right portions of the base 60. In addition, bent portions 607 are formed at each edge of the protruding portion 603 on both sides in the horizontal direction (arrow X direction) of the base 60b, which are folded inward to increase the thickness so that the worker can work safely.

[0035] Further, a pair of base protrusions 605 extending in the horizontal direction (arrow X direction) is provided on the upper surface of the base 60. In the horizontal direction (arrow X direction), the pair of base protrusions 605 are arranged outside the lower ends 33 of the pair of connector side parts 32 of the connector 30. In Fig. 10, the flat plate-shaped portion on the upper surface of the base 60 in the vertical direction (arrow Z direction) is arranged to form a gap G between the pair of connector side parts 32 and the lower ends 33, but the outside of this gap G in the horizontal direction (arrow X direction) is covered by the pair of base protrusions 605.

[0036] The pair of base protrusions 605 are provided on the base 60 at the boundary between the placement portion 600 and the left-side protruding portion 603, and at the boundary between the placement portion 600 and the right-side protruding portion 603. The base protrusions 605 are formed, for example, by recessing the lower surface of the base 60 and protruding the upper surface, and in this case, a base groove 604 is formed on the lower surface of the base 60. A hole 605h, which is a through hole, is formed in the wall of the base protrusion 605 on the placement portion 600 side.

[0037] As shown in Fig. 10, a light source unit 61 is installed on the underside of an arrangement portion 600 of a base 60. A cover 62 is attached to the base 60, and the underside of the arrangement portion 600 on which the light source unit 61 is installed is covered with the cover 62. The base 60 extends outward beyond both lateral ends of the cover 62, which is the light-transmitting portion of the lamp 6, and when the lamp 6 is viewed from below as shown in Fig. 7, protruding portions 603 on both lateral sides of the base 60 protrude outward from the cover 62.

[0038] 8, a power supply unit 64, electric wires (such as a power supply line 66) connected to the power supply unit 64, and a holder 69 are provided on the upper surface of the arrangement portion 600 of the base 60. A second connector 63 that engages with the first connector 4 fixed to the connector 30 is provided on the upper surface of the arrangement portion 600. A control device 68 is provided on the upper surface of the protruding portion 603 of the base 60.

[0039] As shown in Fig. 8 to Fig. 10, the arrangement portion 600 of the base 60 is formed with a through hole 601h1 for passing a power supply line 66 connecting the light source unit 61 (see Fig. 10 described later) installed on the lower surface and the power supply unit 64 installed on the upper surface. The arrangement portion 600 of the base 60 is also formed with a screw hole 601h2 into which a screw 67 for fixing the second connector 63 to the base 60 is screwed, and a screw hole 601h3 into which a screw (not shown) for fixing the power supply unit 64 and the like is screwed. In the example of Fig. 9, the screw hole 601h2 for fixing the second connector 63 is formed in the front part and the rear part of the arrangement portion 600, respectively, in correspondence with the arrangement of the two first connectors 4 shown in Fig. 4. In the periphery of each screw hole 601h2, 601h3 in the base 60, the lower side is recessed by drawing or the like to protrude upward so that the screws 67 do not come into contact with the substrate 610 (see FIG. 10) of the light source unit 61. In addition, two slits 602 for attaching the cover 62 are formed at both ends in the longitudinal direction (front-rear direction) of the arrangement unit 600 of the base 60. Each slit 602 is formed at a fixed length from the end face (front end face or rear end face) of the arrangement unit 600 of the base 60 in the longitudinal direction of the arrangement unit 600.

[0040] (Cover 62) As shown in Fig. 10, the cover 62 is attached to the base 60 and covers the light source unit 61. The cover 62 is, for example, a resin member that diffuses the light emitted from the light source unit 61. As shown in Fig. 7, the cover 62 has a cover main body unit 620 that extends in the longitudinal direction (front-rear direction) of the lamp 6 and covers the entire surface of the light source unit 61 (see Fig. 10), and cover end parts 621 that are provided at both the front and rear end parts of the cover main body unit 620 and serve as lids for the cover main body unit 620.

[0041] As shown in Fig. 10, the cover body 620 is formed so that the cross section normal to the longitudinal direction (front-rear direction) is downwardly convex (e.g., curved), and hooks 624 that protrude upward and are hooked onto the base 60 are provided at both ends of the cover body 620 in the short side direction (horizontal direction). The hooks 624 of the cover body 620 are, for example, claw-shaped and curved inward. In Fig. 10, the hooks 624 are configured to be inserted into the base groove 604 and hooked onto the hole 605h (see Fig. 11) of the base protrusion 605 when the cover 62 is attached to the base 60.

[0042] As shown in FIG. 11, a pair of cover claws 622 protruding upward are provided on both ends of the cover 62 in the longitudinal direction (front-rear direction) so as to face each other in the lateral direction. The pair of cover claws 622 are bent outward at their tips 623, and each of them is L-shaped. When the cover 62 is attached to the base 60, the pair of cover claws 622 of the cover 62 protrude from the upper surface of the arrangement part 600 of the base 60 through two slits 602 formed in the arrangement part 600. When the second connector 63 is installed in the lamp 6, the tips 623 of the pair of cover claws 622 of the cover 62 protruding from the upper surface of the arrangement part 600 are hooked on the second connector 63. The positions and number of the pair of cover claws 622 on the cover 62 may correspond to the positions and number of the second connectors 63 provided on the base 60. For example, when the second connector 63 is provided at only one end in the longitudinal direction of the base 60, the pair of cover claws 622 may also be provided at only one end in the longitudinal direction of the cover 62. Furthermore, the number of cover claws 622 provided for each second connector 63 is not limited to two, and may be one, or three or more.

[0043] (Second connector 63) Fig. 12 is an enlarged perspective view showing the second coupler 63 on the right side of Fig. 9. Fig. 13 is a perspective view of the second coupler 63 of Fig. 12, seen from below. The configuration of the second coupler 63 will be described based on Figs. 8, 9, and 11 to 13, with reference to Figs. 2 and 4.

[0044] As described with reference to Fig. 2, the second coupler 63, together with the first coupler 4, constitutes a coupling mechanism that couples the connector 30 and the lighting fixture 6. As shown in Figs. 8 and 9, the second coupler 63 is attached to the upper surface of the base 60, and is a spring bearing metal fitting on which the first coupler 4 (see Fig. 2) fixed to the connector 30 is hooked. As shown in Fig. 2, the lighting fixture 6 is connected to the fixture 2 via the connector 30 by hooking the first coupler 4, which is a spring, to the second coupler 63 (spring bearing).

[0045] 12 and 13, the second connector 63 has a connector main portion 630 that engages with the first connector 4 (see FIG. 4), a pair of connector side portions 636, and a fixing portion 634 that is fixed to the base 60. In the example of FIGS. 12 and 13, the second connector 63 has legs 639 that come into contact with the upper surface of the base 60.

[0046] The connector main part 630 is a substantially rectangular plate-like member, and a connector opening 631 is formed in the connector main part 630, into which the first connector 4 (see FIG. 4) is inserted. The pair of connector side parts 636 are plate-like members extending from both lateral ends of the connector main part 630 in a direction substantially perpendicular to the connector main part 630 and facing each other. The pair of connector side parts 636 are provided with a pair of engagement parts 637 that engage with the cover 62. The fixing part 634 is a rectangular plate-like member extending from the lower end of the connector main part 630 in a direction substantially perpendicular to the connector main part 630, and a screw insertion hole 635 is formed in the fixing part 634, into which the screw 67 (see FIG. 9) is inserted. In the example of FIG. 12 and FIG. 13, the leg portion 639 is a rectangular plate-like member that is provided at the lower end of one of the connector side portions 636 and extends in a direction substantially perpendicular to this connector side portion 636 .

[0047] In the example of Fig. 8 and Fig. 9, two second connectors 63 are provided for one lamp 6 extending in the front-rear direction. One second connector 63 is fixed to the front part of the upper surface of the base 60, and the other second connector 63 is fixed to the rear part of the upper surface of the base 60 by a screw 67. As shown in Fig. 8, Fig. 12 and Fig. 13, the second connector 63 is disposed on the upper surface of the arrangement part 600 of the base 60 so that the extension direction of the pair of connector side parts 636 coincides with the longitudinal direction (front-rear direction) of the base 60, and the connector main part 630 is disposed on the central side of the longitudinal direction of the base 60. That is, when the second connector 63 is fixed to the base 60, the connector opening 631 is an opening that penetrates the connector main part 630 in the front-rear direction (arrow Y direction).

[0048] 12 and 13, the pair of engagement portions 637 of the second connector 63 are plate-like members protruding outward in the horizontal direction (the direction of the arrow X) from the pair of connector side portions 636, and each is an engagement piece having a substantially horizontal upper surface. Also, each connector side portion 646 is provided with an opening 638 formed in a horizontal L-shape from the lower end on the connector main portion 630 side of the engagement portion 637 to the upper portion of the engagement portion 637.

[0049] 11, the second connector 63 is positioned on the upper surface of the base 60 by engaging a pair of engagement portions 637 with the tips of a pair of cover claws 622 of the cover 62 that are inserted into the two slits 602 of the base 60 and protrude from the upper surface of the base 60. Then, as shown in FIG. 9, the second connector 63 is fixed by screwing a screw 67 inserted into a screw insertion hole 635 (see FIG. 13) of the fixing portion 634 into a screw hole 601h2 of the base 60.

[0050] In addition, the number and shape of the engagement portions 637 with the cover 62 in each second connector 63 are not limited to the above number and shape.

[0051] (Shading device 7) The light blocking device 7 changes the irradiation direction of the lighting device 1, and is attached to the fixture 2 so as to cover the light fixture 6. In the example of Fig. 2, the light blocking device 7 is a louver in which multiple elongated members are arranged in parallel.

[0052] The effect of the connector 30 will be described below with reference to Fig. 10. In Fig. 10, the flow of air flowing through the return path is indicated by dashed arrows.

[0053] 10, foreign matter such as dust and insects generally float within the space in which the lighting device 1 is installed, including the lamp arrangement section 27, and there is concern that foreign matter will adhere to and accumulate on live parts (charging parts) such as the power supply device 64. In particular, in a lighting device 1 compatible with air-conditioning return specifications, foreign matter floating within the lighting space SL moves toward the return opening 22o together with the air as the air-conditioning equipment is operating, so the amount of air passing near the lamp 6, i.e., the amount of foreign matter, increases.

[0054] However, in the lighting device 1 of the first embodiment, the region where the live parts are arranged (i.e., the space SP inside the connector 30) is separated from the return path of the air containing foreign matter by the connector 30, so that the attachment and accumulation of foreign matter on the live parts is suppressed. Therefore, even if the lighting device 1 is used for a long period of time, the risk of a malfunction of the electrical system, such as a short circuit, can be reduced. Furthermore, if the connector 30 is made of a non-combustible material such as a metal material, even if a fire breaks out from the live parts, the fire can be suppressed from spreading outside the connector 30.

[0055] (Air conditioning return specifications) Fig. 14 is a diagram illustrating gaps between components in a main part of the lighting device 1 according to embodiment 1. Fig. 15 is a top view showing a main part of the lighting device 1 in Fig. 14. As shown in Figs. 14 and 15, the lighting device 1 compatible with the air conditioning return specification can secure a flow path with an area Sa (Sa = S1 + S2) between the device 2 and the luminaire 6, and a return opening with an area Sb (Sb = S3 + S4) on the top surface 22 of the device 2.

[0056] Here, the areas S1 and S2 are the areas of the flow passages formed on the left side of the lamp 6 in the housing 20 and the areas of the flow passages formed on the right side of the lamp 6. The area Sb is the area obtained by subtracting the area blocked by the connector upper part 34 of the connector 30 from the opening area of ​​the opening 22o formed in the top surface part 22 of the housing 20. The areas S3 and S4 are the areas of the return openings formed on the left side of the connector upper part 34 and the areas of the return openings formed on the right side of the connector upper part 34.

[0057] Specifically, the area S1 of the flow path formed on the left side of the lamp 6 is calculated by S1=L1×W1 using the distance W1 between the partition plate 23 constituting the left side surface of the housing part 20 and the left end of the base 60 of the lamp 6, and the length L1 of the lamp mounting part 27 in the longitudinal direction (arrow Y direction). The area S2 of the flow path formed on the right side of the lamp 6 is calculated by S2=L1×W2 using the distance W2 between the side surface part 21 constituting the right side surface of the housing part 20 and the right end of the base 60 of the lamp 6, and the length L1 of the lamp mounting part 27 in the longitudinal direction (arrow Y direction). The area S3 of the return opening formed on the left side of the connector upper part 34 is calculated by S3=L3×W3 using the distance W3 between the left end of the opening 22o and the left end of the connector upper part 34, and the length L3 of the opening in the front-rear direction (arrow Y direction). In addition, the area S4 of the return opening formed on the right side of the connector upper part 34 is calculated using the distance W4 between the right end of the opening 22o and the right end of the connector upper part 34 and the length L4 of this opening in the front-to-back direction (arrow Y direction), as S4 = L4 × W4.

[0058] The lighting device 1 compatible with the air conditioning return specification is configured to satisfy the conditions of the following formulas 1, 2, and 3.

[0059] [Number 1] S3≧S1 (Formula 1) [Number 2] S4≧S2 (Formula 2) [Number 3] S3+S4≧S1+S2 (Formula 3)

[0060] In the lighting device 1 of the first embodiment, compared to a conventional configuration in which a member with an upper surface larger than the luminaire, such as a reflector, is disposed between the luminaire and the device, the area of ​​the return opening can be secured regardless of the shape of the luminaire 6, and the area of ​​the return opening can be easily designed and managed. Therefore, the above three conditions, which are the required specifications for the air conditioning return, can be more reliably met. In addition, since the connector 30 is exposed to the air conditioning return path, it contributes to improving the cooling effect of the luminaire 6.

[0061] Fig. 16 is a diagram showing the assembly process of the lighting device 1 according to embodiment 1, and is a cross-sectional view showing a state in which the connector 30 and the first coupling device 4 are fixed to the fixture 2. Fig. 17 is a diagram showing the assembly process of the lighting device 1 according to embodiment 1, and is a cross-sectional view showing a state in which the lamp 6 is attached to the fixture 2 by the coupling mechanism and the connector 30. The assembly process (i.e., the production process) of the lighting device 1 will be described below with reference to Figs. 16 and 17, and Fig. 14 showing the lighting device 1 after assembly is completed.

[0062] <Assembly process> As shown in Fig. 16, first, the connector 30 and the first coupling device 4 (spring) are fixed to the top surface 22 of the device 2 using fasteners 5 such as a screw 50 and a nut 51. In Fig. 16, the first coupling device 4 is fixed to the top surface 22 of the device 2 together with the connector 30 by the fastener 5, but the first coupling device 4 may be fixed to the connector 30 in advance, in which case the connector 30 to which the first coupling device 4 has been fixed in advance may be fixed to the top surface 22 of the device 2 using the fastener.

[0063] 17, the first connector 4 and the second connector 63 (spring receiver) provided on the lamp 6 are engaged with each other, and in this engaged state, the lamp 6 is pushed up toward the top surface portion 22 (upward), and the restoring force of the spring attaches the lamp 6 to the connector 30. As a result, the lamp 6 is accommodated in the lamp arrangement portion 27 of the device 2 to which the connector 30 is fixed.

[0064] Thereafter, as shown in FIG. 14, a light blocking device 7 such as a louver is disposed below the lighting device 6 and attached to the side surface of the housing 20 (the side surface portion 21, the partition plate 23, etc.).

[0065] <New construction work> 1, 3 and 8, a new installation work for installing a lighting device 1 including a fixture 2 on a ceiling will be described. First, as shown in Fig. 1, the lighting device 1 is installed on a support member 9 (e.g., a bar member) which is a ceiling fixture. Specifically, the lighting device 1 is installed on the support member 9 by hooking a plurality of fixture fixing devices 25 (see Fig. 3) provided on the fixture 2 onto the support member 9.

[0066] Thereafter, wiring is performed, for example, by connecting electric power lines such as a power supply line and electric wires such as a communication line to the lighting fixture 6 (see FIG. 8).

[0067] <Repair work> 14 and 17, repair work such as part replacement or inspection will be described. First, as shown in Fig. 17, the light blocking device 7 is removed from the side of the housing 20 (the side surface 21 and the partition plate 23, etc.). Next, as necessary, the lamp 6 is pulled down (downward) to the opening side of the lamp arrangement section 27, and held in a state in which the first connector 4 and the second connector 63 are engaged with each other, so that the upper part of the lamp 6 can be seen, and repair work can be performed.

[0068] Once the adjustment is complete, as shown in Fig. 17, the lamp 6 is pushed up toward the top surface 22 with the first connector 4 and the second connector 63 engaged, and the lamp 6 is attached to the connector 30 by the restoring force of the spring. After that, as shown in Fig. 14, the light blocking device 7 is placed below the lamp 6 and attached to the side of the housing 20 (the side surface 21, the partition plate 23, etc.).

[0069] The lighting device 1 is not limited to the above configuration. For example, the connector 30 may be configured such that the pair of connector side parts 32 are deformed in accordance with the specifications (e.g., shape and size) of the lighting device 6 to be used.

[0070] Fig. 18 is a cross-sectional view showing a configuration example of a connector 30 according to the first modified example in which the inclination angle θ of a pair of connector side portions 32 is an obtuse angle. Fig. 19 is a cross-sectional view showing a configuration example of a connector 30 according to the first modified example in which the inclination angle θ of a pair of connector side portions 32 is a right angle.

[0071] As shown in Figs. 18 and 19, the pair of connector side parts 32 may be substantially flat with a uniform inclination angle θ from the upper end connected to the connector upper part 34 to the lower end part 33 curved inward. The connector 30 according to the first modification is configured so that the inclination angle θ of the pair of connector side parts 32 can be selected according to the shape and size of the lamp 6 to be used. Specifically, the connector 30 is configured so that the inclination angle θ of the pair of connector side parts 32 can be changed in the range of 90 degrees ≦ θ ≦ 180 degrees. For example, when a lamp 6 having a wide arrangement part 600 of the base 60 is used, the inclination angle θ of the pair of connector side parts 32 may be set to an obtuse angle larger than 90 degrees as shown in Fig. 18. Also, for example, when a lamp 6 having a high component installed in the arrangement part 600 of the base 60 is used, the inclination angle θ of the pair of connector side parts 32 may be set to 90 degrees as shown in Fig. 19.

[0072] In addition, both or one of the pair of connector side parts 32 may have a curved shape. In addition, both or one of the pair of connector side parts 32 may have a shape that combines a plane with a plane. In the example shown in Fig. 6, both of the pair of connector side parts 32 are bent midway and have a shape that combines a plane with an obtuse inclination angle θ and a plane with an inclination angle θ of 90 degrees. In addition, the pair of connector side parts 32 may have a cross-sectional shape that is normal to the longitudinal direction of the connector 30 (arrow Y direction) that is symmetrical or asymmetrical.

[0073] 14 shows a case where the connector 30 is attached to the device 2 so that the connector upper part 34, which is the upper surface of the connector 30, contacts the top surface 22 of the device 2, but an adjustment tool (not shown) may be disposed in a part between the top surface 22 of the device 2 and the connector 30 to provide a space between the top surface 22 of the device 2 and the upper surface of the connector 30. The adjustment tool can ensure a larger area Sb (i.e., S3+S4) of the return opening. The function of the adjustment tool, i.e., the function as a spacer, may be realized by a part formed integrally with the connector 30. The adjustment tool may further have an optical adjustment function such as an orientation characteristic, or a function of adjusting the mounting position of the lighting fixture 6 etc. in accordance with the dimensions of the device 2.

[0074] In addition, the connector 30, the lamp 6 and the connecting mechanism can be commonly used with lighting devices that do not comply with air conditioning return specifications (for example, a fixture 2 that does not have a return opening 22o), and the above-mentioned dust-proof and insect-proof effects can be obtained.

[0075] 10 shows a case where the base 60 of the lamp 6 is disposed away from the connector 30, but the connector 30 may be in contact with the base 60. In this case, if the connector 30 and the base 60 have different expansion coefficients, it is desirable to reduce the contact area by providing irregularities on at least one of the contacting surfaces in order to suppress the generation of abnormal noise due to the stick-slip phenomenon.

[0076] As a method for suppressing the intrusion of foreign matter into the live parts or the spread of fire while suppressing the generation of abnormal noise, it is also effective to sandwich an elastic member (not shown) such as an elastomer between the connector 30 and the base 60 so as to prevent direct contact between them. From the viewpoint of suppressing the spread of fire, it is desirable for the elastic member to have flame retardant or non-flammable properties, and for the elastic member to be disposed at a position that is shielded from the live parts (charging parts).

[0077] Furthermore, the lighting device 1 may include an auxiliary connector (not shown) such as a wire for the purpose of connecting the connector 30 to the fixture 2 or a ceiling fixture such as a bar member. By including the auxiliary connector, the connector 30 is prevented from coming off the fixture 2 even if it is subjected to vibrations from a building or ceiling fixture during use, or vibrations or impacts during repair. This allows workers to safely perform installation or repair work on the lighting device 1, and also allows users to safely use the lighting device 1 for a long period of time.

[0078] Furthermore, in the assembly process (i.e., production process) of the lighting device 1 including the fixture 2, the connector 30 may be fixed to the fixture 2 using a method such as crimping or welding. Alternatively, fixing with fasteners such as screws and nuts and fixing by crimping or welding may be used in combination. Since crimping or welding does not have the risk of loosening or falling off like screws and nuts, the connector 30 is unlikely to come off from the fixture 2 even if the lighting device 1 is subjected to vibration or impact during transportation or installation, vibration from a building or ceiling equipment during use, or vibration or impact during repair. Therefore, workers can safely perform installation and repair work on the lighting device 1, and users can safely use the lighting device 1 for a long period of time.

[0079] In addition, Figure 8 illustrates a control device 68 as equipment that is placed on the upper part of the protruding portion 603 of the base 60 of the lighting fixture 6. In addition to the control device 68, a power terminal block (not shown), a communication terminal block, electric wires to be placed inside the fixture, and a holder for holding the electric wires can also be placed on the upper part of the protruding portion 603.

[0080] Furthermore, when the base 60 or its overhang 603 is made of a light-shielding material such as a metal material, the area above the overhang 603 is visually blocked by a user standing below the lighting device 1. Therefore, the devices and the like arranged above the base 60 in the lighting device 1 and the ceiling (for example, the control device 68, the power supply device 64, the electric wires, the connecting mechanism, the return opening 22o in the fixture 2, and the part of the ceiling equipment located above the base 60) cannot be seen from below the overhang. Therefore, the user does not feel uncomfortable when using the lighting device 1.

[0081] At least a part of the base 60 is preferably made of a material having a property of transmitting signals such as infrared rays or electromagnetic waves. In this way, a user can use a communication terminal such as a remote control to issue instructions to the control device 68 from below the protruding portion 603 and control the lighting device 1. It is preferable that the base 60 is configured so that the user cannot see devices and the like arranged above the base 60 from the lighting space SL side through the part made of a material that transmits signals such as infrared rays or electromagnetic waves.

[0082] As described above, the lighting device 1 according to the first embodiment includes the fixture 2, which is installed on a ceiling fixture and has an opening 22o for air conditioning return formed on its upper surface (top surface portion 22), the luminaire 6, the connector 30 to which the luminaire 6 is detachably attached, and a coupling mechanism. The luminaire 6 is disposed on the fixture 2 and includes a base 60 extending in a first horizontal direction (arrow Y direction), a power supply unit 64 installed on the upper surface of the base 60, a light source unit 61 provided on the lower side of the base 60, and a light-transmitting portion (cover 62) covering the light source unit 61. The connector 30 is disposed between the fixture 2 and the luminaire 6, and covers the power supply unit 64 attached to the fixture 2 and installed on the upper surface of the base 60. The connecting mechanism has a first connector 4 provided on the connector 30 and a second connector 63 provided on the lamp 6 and engaged with the first connector 4, and the first connector 4 and the second connector 63 engage with each other to connect the lamp 6 to the connector 30. The connector 30 has a connector main part 31 whose cross section normalized to the first direction (arrow Y direction) is upwardly convex so as to form a space SP in which a power supply unit 64 is disposed between the connector 30 and the upper surface of the base 60. In a second direction (arrow X direction) that is horizontal and perpendicular to the first direction, the air conditioning return opening 22o is provided outside the ends on both sides in the second direction of the upper surface (connector upper part 34) of the connector main part 31.

[0083] The lighting device 1 includes a connector 30, and a coupling mechanism couples the connector 30 and the lamp 6, the connector 30 has a connector main part 31 that is convex upward so as to form a space SP in which a power supply unit 64 is disposed between the connector 30 and the upper surface of the base 60, and in the second direction, the opening 22o for air conditioning return is provided outside both ends of the upper surface of the connector main part 31. This makes it possible to prevent the opening 22o from being blocked as in the conventional lighting device, and makes it easy to maintain the air conditioning return specification in the lighting device 1 in which the lamp 6 is replaceable.

[0084] Moreover, the base 60 or the connector 30 has a protruding portion 303 or 603 that protrudes outward beyond both ends of the light-transmitting portion (cover 62) in the second direction (arrow X direction). This allows the protruding portion 303 or 603 to determine the area Sa of the return air flow path in the appliance 2, making it easier to design and manage the area of ​​the return opening.

[0085] Moreover, the base 60 has a protruding portion 603, and the connector 30 has a width in the second direction (arrow X direction) smaller than the width of the base 60. A pair of base protrusions 605 extending in the first direction is provided on the upper surface of the base 60, and the pair of base protrusions 605 on the upper surface of the base 60 are disposed outward from both ends of the connector 30 in the second direction.

[0086] This closes the gap between the upper surface of the base 60 and the lower end of the connector 30, making it more difficult for foreign matter to enter the space SP. In addition, the pair of base protrusions 605 can prevent the connector 30 from shifting in the second direction (the direction of the arrow X).

[0087] Further, a slit 602 extending in the first direction from the end face is formed on the end side of the base 60 in the first direction (arrow Y direction). The light transmitting portion is a cover 62 attached to the base 60, and a cover claw 622 protruding from the upper surface of the base 60 via the slit 602 is provided on the end side of the cover 62 in the first direction. The second connector 63 is disposed on the upper surface of the base 60 on the end side in the first direction, and has an engagement piece that engages with the tip of the cover claw 622.

[0088] Furthermore, the lighting device 1 has a control device 68 arranged outside the connector 30 and on the upper surface of the protruding portion 303 or 603. Providing the control device 68 allows the user to adjust the brightness and the like via a remote control or the like, and by arranging the control device 68 outside the connector 30 and on the upper surface of the protruding portion 303 or 603, communication with the outside (such as a remote control) is facilitated while maintaining the design.

[0089] The lighting device 1 also includes a fastener 5 that passes through the first connector 4 and the connector main portion 31 and fixes the first connector 4 to the fixture 2 via the connector 30. This simplifies the assembly process of the lighting device 1.

[0090] Embodiment 2 FIG. 20 is a diagram showing a renewal procedure of the lighting device 1a according to the second embodiment, and is a cross-sectional view showing a state before the connector 30 and the first coupling device 4 are fixed to the existing fixture 2a after removing the existing luminaire (not shown). FIG. 21 is a diagram showing a renewal procedure of the lighting device 1a according to the second embodiment, and is a cross-sectional view showing a state in which the replaced luminaire 6 is attached to the existing fixture 2a via the coupling mechanism and the connector 30. FIG. 22 is a diagram showing a renewal procedure of the lighting device 1a according to the second embodiment, and is a cross-sectional view showing a state in which the renewal construction is completed. In the second embodiment, the lighting device 1a includes the existing fixture 2a as a fixture.

[0091] Here, the existing lighting device before the renewal work is, for example, a conventional light source (existing lamp) such as a fluorescent lamp attached to the existing fixture 2a for use. Below, the renewal method will be explained using an example in which the existing fixture 2a is utilized and the conventional light source such as a fluorescent lamp is changed to a light source unit (lamp 6) using a highly efficient light source such as a light emitting diode.

[0092] First, as a preparation work, existing members (not shown) such as existing lighting fixtures that will not be used after the renewal are removed while leaving the existing fixture 2a installed on a support member 9 (for example, a bar member) that is a ceiling fixture.

[0093] Thereafter, the installation work is performed in the following procedure. First, as shown in Fig. 20, the connector 30 and the first coupling device 4 (spring) are fixed to the top surface 22a of the device 2a using fasteners 5 such as a screw 50 and a nut 51. In Fig. 20, the first coupling device 4 is fixed to the top surface 22 of the device 2 together with the connector 30 by the fastener 5, but the first coupling device 4 may be fixed to the connector 30 in advance. In this case, the connector 30 to which the first coupling device 4 has been fixed in advance may be fixed to the top surface 22a of the device 2a using the fastener.

[0094] Thereafter, the first connector 4 and the second connector 63 (spring receiver) provided on the lighting fixture 6 are engaged with each other, and while maintaining this state, wiring is performed, such as connecting electric power lines such as power lines and communication lines to the lighting fixture 6. Thereafter, as shown in Fig. 21, with the first connector 4 and the second connector 63 engaged with each other, the lighting fixture 6 is pushed up toward the top surface portion 22a (upward), and the lighting fixture 6 is attached to the connector 30 by the restoring force of the spring. Thereafter, as shown in Fig. 22, the light blocking device 7 is disposed below the lighting fixture 6 and attached to the side surface (side surface portion 21, partition plate 23, etc.) of the housing portion 20.

[0095] In the lighting device 1, as in the conventional case, renewal can be performed by changing the type of the light source unit, and common parts (the lamp 6, the connector 30, and the coupling mechanism) can be used in the renewal using the above-mentioned existing fixture 2a and the new construction described in the embodiment 1. Therefore, as in the conventional case, reduction in the cost of parts during renewal can be expected.

[0096] In the lighting device 1 of the present disclosure, the luminaire 6 and the connector 30 are connected by a connection mechanism, so that even when the type of light source unit is changed, the work of attaching the luminaire 6 to the existing fixture 2a during renewal can be standardized. Furthermore, in the lighting device 1 of the present disclosure, in renewal construction utilizing the existing fixture 2a, regardless of whether the existing fixture 2a has a return opening 22o formed in the top surface 22a, it is easy to configure the lighting device 1 to meet the required specifications for air conditioning return using common components (the luminaire 6, the connector 30, and the connection mechanism).

[0097] Incidentally, when the lighting device before renewal is a fixture with a lamp such as a fluorescent lamp attached thereto, the existing fixture 2a may be formed with a mounting portion (not shown) for mounting the lamp such as a fluorescent lamp protruding inside the lamp arrangement portion 27 (see FIG. 22). Below, a description will be given of a modified example of the connection mechanism in the lighting device 1a including the fixture 2a with a mounting portion formed therein.

[0098] Fig. 23 is a perspective view of the connection mechanism 3a according to the second modified example, as viewed from above. Fig. 24 is an exploded perspective view of the connection mechanism 3a of Fig. 23. Fig. 25 is a perspective view of the adjustment tool 36 in the connection mechanism 3a of Fig. 24. Fig. 26 is a perspective view of the connection mechanism 3a of Fig. 23 with the first coupling tool 4 attached, as viewed from below. As shown in Figs. 23 and 24, the connection mechanism 3a according to the second modified example has a connector 30a and an adjustment tool 36.

[0099] 24, the connector 30a has cutouts 35 formed on both ends in the longitudinal direction (arrow Y direction) from the connector main part 31a to the pair of connector side parts 32a, with the cutouts 35 being cut out of the connector main part 31a and parts of the connector side parts 32a. Also, a screw insertion hole 37 is formed on the edge of the cutout 35 in the connector main part 31a, through which a screw 38 for fixing the adjustment tool 36 to the connector main part 31a is inserted. The adjustment tool 36 is fixed to the connector 30a using a screw 53, a nut (not shown), or the like.

[0100] 25, the adjustment tool 36 has a pair of first fixing parts 361, a second fixing part 362, and a pair of adjustment parts 363 that connect the second fixing part 362 to each of the pair of first fixing parts 361. The first fixing part 361, the second fixing part 362, and the adjustment part 363 each have a flat plate shape. The first fixing part 361 and the adjustment part 363 are connected at a substantially right angle, and the adjustment part 363 and the second fixing part 362 are connected at a substantially right angle, and the adjustment tool 36 has a concave shape in which the second fixing part 362 is disposed lower than the first fixing part 361 in a side view.

[0101] 24 and 25, the first fixing portion 361 has a screw insertion hole 361h through which the screw 53 for fixing the adjustment tool 36 to the connector main part 31a is inserted. Also, as shown in Fig. 25, the second fixing portion 362 has a screw insertion hole 362h through which the screw 50 (see Fig. 22) for fixing the adjustment tool 36 to the mounting part (not shown) of the appliance 2a is inserted.

[0102] 24, the adjuster 36 is placed in the cutout 35 of the connector main part 31a from above, and a pair of first fixing parts 361 are fixed to the front and rear edges of the cutout 35 of the connector main part 31a by fasteners 5a such as screws 53. Then, in the connection mechanism 3a in which the adjuster 36 is attached to the connector 30a, the second fixing part 362 is fixed to the mounting part (not shown) of the device 2a by screws 50 (see FIG. 22), thereby attaching the connection mechanism 3a to the device 2a.

[0103] In the vertical direction (arrow Z direction), the depth dimension (not shown) of the notch 35 of the connector 30a is equal to or smaller than the height dimension H (see FIG. 25) of the adjustment part 363. As shown in FIG. 26, the shape and dimensions of the first coupling device 4 (spring) attached to the connector 30 are determined so as not to come into contact with the adjustment device 36 attached to the notch 35 of the connector 30a, and the second coupling device 63 (spring receiver) of the lamp 6 is determined so as not to come into contact with the adjustment device 36 when the lamp 6 is attached to the connector 30a (see FIGS. 21 and 22). As a result, the coupling mechanism does not come into contact with the adjustment device 36, and does not impede renewal construction.

[0104] The connection mechanism 3a shown in FIG. 24 is attached to the fixture 2a by fixing the second fixing portion 362 of the adjustment tool 36 arranged in the cutout portion 35 of the connector 30a to the mounting portion offset downward from the top surface portion 22a of the fixture 2a using the fixing device 5 such as a screw 50 and a nut 51 (see FIG. 22). Therefore, even when utilizing an existing fixture 2a in which a mounting portion that protrudes to the inside of the lamp arrangement portion 27 is formed, the connector upper portion 34a can be arranged above the tip (lower end) of the mounting portion. As a result, the connection mechanism 3a and the lamp 6 can be arranged on the side of the top surface portion 22a inside the existing fixture 2a (lamp arrangement portion 27), so that the renewal construction can be performed without any obstacle such as the lamp 6 coming into contact with the shade 7 arranged at the bottom of the lamp arrangement portion 27.

[0105] For example, if the height dimension of the existing fixture 2a used in the renewal construction is large and the lighting fixture 6 is disposed at the upper part inside the fixture 2a and the intended brightness cannot be ensured when the adjustment tool 36 is installed in the orientation of Fig. 24, the adjustment tool 36 may be installed in the connector 30a with the top and bottom orientation reversed. In this case, the second fixing part 362 is arranged so as to protrude upward from a pair of first fixing parts 361 fixed to the connector main part 31a in the adjustment tool 36, so that when the second fixing part 362 is fixed to the mounting part of the fixture 2a, the lighting fixture 6 is disposed further downward in the lighting fixture arrangement part 27.

[0106] In this way, by configuring the adjustment tool 36 and the connection tool 30a as separate members, the height position of the luminaire 6 in the device 2a can be adjusted, and as a result, the brightness of the illumination space SL can be adjusted. Furthermore, if the connection mechanism 3a is transported in a state in which the second fixing portion 362 of the adjustment tool 36 is placed in the cutout portion 35 (as shown in FIG. 23), an increase in packaging volume can be avoided even if the adjustment tool 36 is added as the connection mechanism 3a, and packaging material costs and transportation efficiency can be maintained. As a result, an increase in environmental impact can also be avoided.

[0107] In addition, the connection mechanism 3a including the adjustment tool 36 can also be used for new construction. If the adjustment tool 36 is not necessary for new construction, the adjustment tool 36 can be removed from the connector 30a of the connection mechanism 3a, and only the connector 30a can be used for new construction. In other words, at least a part of the connection mechanism 3a can be used in common in renewal construction utilizing the existing device 2a and in the new construction described in the first embodiment.

[0108] In addition, in a renewal construction utilizing an existing fixture 2a, the connector 30a may be fixed to the fixture 2a by a method such as crimping or welding. Alternatively, fixing by a fastener such as a screw and a nut and fixing by crimping or welding may be used in combination. Since crimping or welding does not have the risk of loosening or falling off like screws and nuts, the connector 30a is unlikely to come off the fixture 2a even if the lighting device 1a is subjected to vibrations from a building or ceiling equipment during use, or is subjected to vibrations or impacts during repairs, inspections, or the next renewal construction. Therefore, workers can safely perform construction work and correction work on the lighting device 1a, and users can safely use the lighting device 1a for a long period of time.

[0109] Furthermore, in the lighting device 1a of the second embodiment, similarly to the first embodiment, the connector 30a may be connected to the fixture 2 or a ceiling fixture such as a bar member using an auxiliary connector (not shown) such as a wire. By providing the auxiliary connector, the connector 30 is prevented from coming off the fixture 2a even if it is subjected to vibrations from a building or ceiling fixture during use, or vibrations or impacts during repair, inspection, or the next renewal construction. This allows workers to safely repair, inspect, or construct the lighting device 1a, and allows users to safely use the lighting device 1a for a long period of time.

[0110] As described above, the lighting device 1a according to the second modification includes the adjuster 36 that is provided on the upper part of the connector main part 31a and adjusts the distance between the fixture 2a and the connector 30a in the vertical direction (the direction of the arrow Z). This makes it possible to adjust the height position of the luminaire 6 within the fixture 2a so as to obtain the intended brightness according to the height dimension of the existing fixture 2a.

[0111] Embodiment 3 Fig. 27 is a cross-sectional view showing a main part of the lighting device 1b according to the third embodiment. Fig. 28 is an exploded perspective view of the connector 30b, the first coupling device 4, and the lamp 6b in the lighting device 1b of Fig. 27. Fig. 29 is a perspective view showing the first coupling device 4 attached to the connector 30b of Fig. 28, seen from above. Fig. 30 is a cross-sectional view showing the connector 30b of Fig. 29. Hereinafter, the configuration of the lighting device 1b according to the third embodiment will be described based on Figs. 27 to 30 and with reference to Fig. 3. In the lighting device 1b of the third embodiment, the configurations of the lamp 6b and the connector 30b are different from those of the first embodiment.

[0112] The lighting device 1b according to the third embodiment is defined as being attached to a system ceiling S for use, similar to the lighting device 1 according to the first embodiment, and the lighting device 1b uses a fixture 2 similar to that of the lighting device 1. An opening 22o (see FIG. 3) for air conditioning return is formed in a top surface portion 22 of the fixture 2.

[0113] FIG. 31 is an external perspective view of a lighting device of a comparative example. FIG. 32 is an exploded perspective view of the lighting device of the comparative example shown in FIG. 31. FIG. 31 illustrates the structure inside the cover 62b for a part of the luminaire 6b. The lighting device 1x of the comparative example shown in FIG. 31 and FIG. 32 is a ceiling-mounted lighting device that is attached to a ceiling surface by being fixed to a support member 9a (e.g., a hanging bolt) that is a ceiling fixture using a nut 90 and a washer 91. In the lighting device 1x of the comparative example, the base 60b and the cover 62b of the lighting device 6b have substantially the same width in the horizontal direction (arrow X direction). A pair of hooks 624b provided at both ends of the cover 62b (particularly the cover main body 620b) in the horizontal direction engage with both ends of the base 60b in the horizontal direction (arrow X direction), thereby mounting the cover 62b to the base 60b.

[0114] As shown in Fig. 32, the fixture 2x of the lighting device 1x of the comparative example has an elongated shape extending in the front-rear direction (arrow Y direction), and the housing part 20x has a rectangular top surface part 22x. The housing part 20x also has a pair of inclined surface parts 29x extending downward and inward from a pair of long sides of the top surface part 22x, a pair of parallel inner side surface parts 21x extending upward from the lower ends of the pair of inclined surface parts 29x, and a pair of lid parts 24x constituting the end faces of the housing part 20x. The housing part 20x is formed with a lamp arrangement part 27x having a width substantially the same as the width of the lamp 6b in the lateral direction (arrow X direction). In the lighting device 1x of the comparative example, the first connector 4 is provided on the top surface part 22x of the fixture 2x.

[0115] 27 and 28, the lighting device 1b of the embodiment 3 uses the same luminaire 6b as the lighting device 1x of the comparative example (a ceiling-mounted lighting device). The configuration of the luminaire 6b used in common between the lighting device 1x of the comparative example and the lighting device 1b of the embodiment 3 will be described in more detail below.

[0116] A light source unit 61b is installed on the lower surface of the base 60b, and an arrangement section 600b on the upper surface of the base 60b is provided in which a power supply device 64b and the like are installed. In addition to the power supply device 64b, a power line 66b connected to the power supply device 64b, a second connector 63b, and the like are installed in the arrangement section 600b.

[0117] In the lighting device 1b of the third embodiment, the cover 62b of the lamp 6b is attached to the base 60b by engaging the pair of hooks 624b with the lateral ends of the arrangement portion 600b of the base 60b. For this reason, the lighting device 1b of the third embodiment defines that the second connector 63b does not have the pair of engagement portions 637 (i.e., the portion that engages with the cover 62) of the first embodiment. In the lighting device 1b of the third embodiment, the cover 62b does not have the pair of cover claws 622 (i.e., the portion that engages with the second connector 63) of the first embodiment, and the base 60b does not have the slits 602 (i.e., the portion into which the pair of cover claws 622 are inserted) of the first embodiment.

[0118] Next, the configuration of the connector 30b of the lighting device 1b will be described with reference to Figs. 27, 29, and 30. As shown in Fig. 27, the connector 30b has a connector main part 31b whose cross section is convex so as to form a space SP between the arrangement part 600b of the base 60b, as in the case of the first embodiment. The connector upper part 34b is fixed to the top surface part 22b of the fixture 2b. The connector 30b also has a horizontal flat-plate-like overhanging part 303 (sometimes referred to as a flat-plate part) provided on the outside of the lower end part 33b of the pair of connector side parts 32b in the connector main part 31b so as to protrude from the cover 62b in the lateral direction. That is, in the lighting device 1b of the third embodiment, the connector 30b of the connector 30b and the luminaire 6b arranged in the luminaire arrangement part 27 in the fixture 2 has the overhanging part 303.

[0119] 30, the inclination angle θ of a pair of connector side portions 32b changes midway, and the lower ends 33b extend vertically (in the direction of the arrow Z) and are parallel to each other. In the connector 30b shown in Fig. 30, a boundary protrusion 305 is formed at the boundary between the connector main portion 31b and the protruding portion 303, with the lower surface side recessed and the upper surface side protruding, and a double wall portion 306 is formed by the wall portion on the connector main portion 31b side of the boundary protrusion 305 and the lower end portion 33b of the connector side portion 32b.

[0120] 27, when the lamp 6b is attached to the connector 30b, the cover 62b comes into contact with the inner surface of the lower end 33b of the pair of connector side parts 32b. Therefore, the space SP is separated from the outside (the space outside the connector main part 31b in the lamp mounting part 27) by the cover 62b of the lamp 6b and the connector main part 31b. In addition, the double wall part 306 of the connector 30b prevents the cover 62 attached to the base 60b of the lamp 6b from falling off.

[0121] As shown in Fig. 28, the connector 30b extends in the front-rear direction (arrow Y direction) so as to cover the placement section 600b in the longitudinal direction (front-rear direction) of the base 60b. As shown in Fig. 29 and Fig. 30, bent sections 307 are formed on each edge of the overhanging section 303 on both sides in the lateral direction (arrow X direction) of the connector 30b, and are folded back inward to increase the thickness so that a worker can work safely.

[0122] FIG. 33 is a diagram showing an assembly process of the lighting device 1b according to the third embodiment, and is a cross-sectional view showing a state in which the connector 30b and the first connector 4 are fixed to the fixture 2. FIG. 34 is a diagram showing an assembly process of the lighting device 1b according to the third embodiment, and is a cross-sectional view showing a state in which the luminaire 6b is attached to the fixture 2 by the connecting mechanism and the connector 30b, and the light blocking device 7 is attached to the opening of the fixture 2. In the lighting device 1b according to the third embodiment, the connecting mechanism is provided between the lighting device 6b and the connector 30b, as in the first embodiment. Therefore, in the lighting device 1b according to the third embodiment, as in the first embodiment, the assembly, new installation, and repair work can be performed, and as in the second embodiment, the renewal work can be performed.

[0123] Furthermore, as shown in FIG. 34, if the distances W11, W12 between the connector 30b having the protruding portion 303 and the left and right side surfaces of the fixture 2 (partition plate 23 and side surface portion 21) in the lighting device 1b are set to the same values ​​as the distances W1, W2 between the base 60 having the protruding portion 603 and the left and right side surfaces of the fixture 2 in the lighting device 1 of embodiment 1, the air conditioning return specifications can be met, as with the lighting device 1 of embodiment 1.

[0124] Furthermore, the lighting device 1b for grid-type system ceiling of the third embodiment can use the same luminaire 6b (light source unit) as the lighting device 1x (a long-shaped ceiling-mounted luminaire) of the comparative example, which has a different form from the lighting device 1b. If the manufacturer of the fixture 2 is different from the manufacturer of the luminaire 6b, it is possible to use the fixture 2 or the luminaire 6b in common by making the connection mechanism 3 (connector 30b) and the first connector 4 attached to the connection mechanism 3 correspond to the fixture 2 and the luminaire 6b.

[0125] As described above, in the lighting device 1b according to the third embodiment, the connector 30b has the protruding portions 303 that protrude outward from both ends of the light-transmitting portion (cover 62) in the second direction. The connector 30b has flat plate portions (protruding portions 303) that extend in the second direction outside both ends of the connector main portion 31b in the second direction (arrow X direction). Both ends of the connector main portion 31b in the second direction are in contact with the light-transmitting portion (cover 62b) of the lamp 6b.

[0126] Since both ends in the second direction of the connector main part 31b are in contact with the cover 62b of the lamp 6b, the gap between the lower end of the connector main part 31b and the lamp 6b can be blocked even if the connector 30b has the protruding part 303 and the width of the connector 30b is wider than the width of the lamp 6b. As a result, the intrusion of foreign matter into the space SP from the gap below the connector main part 31b can be more reliably prevented.

[0127] The lighting device is not limited to the configurations of the first embodiment and its first modification, the second embodiment and its second modification, and the third embodiment. The configurations of the above-mentioned embodiments are merely examples, and may include other configurations. Also, the lighting device may have a configuration in which all or part of the above-mentioned embodiments are combined. In other words, the lighting devices 1, 1a, and 1b include the range of design changes and application variations that are normally implemented by a person skilled in the art, within the scope of the technical concept.

[0128] The lighting devices 1, 1a, and 1b can be adapted to various optical specifications as follows.

[0129] For example, the lighting device 1 may be modified to a downlight specification by changing to a base 60 having electrical and mechanical connection functions. A lamp 6 in which a light source, a cover 62, and a reflector are integrated may be attached to the base 60, or a light source and a cover 62 may be disposed on the base 60, and a reflector may be disposed instead of the light shielding device 7 (louver).

[0130] Furthermore, the lighting device 1 may be configured so that the light source is suspended below the fixture 2 by changing the base 60 to a base provided with electrical and mechanical connection functions. The light source may be elongated or may be suitable for spot lighting. The lighting device 1 may employ an organic EL or laser, or a light source that imitates natural light by using a scattering effect. The lighting device 1 may have an optical axis oriented to the side. For example, the mounting angle of the luminaire 6 relative to the fixture 2 may be changed, or the angle of the overhang (overhang 603 or overhang 303) may be changed.

[0131] In addition, the light blocking device 7 (louver) of the lighting device 1 can be changed to an optical component. For example, it may be changed to an optical cover with glare-cut specifications to suppress glare, or it may be changed to a lens to control light distribution. In addition, the light blocking device 7 (louver) of the lighting device 1 can be changed in reflectance, exterior color, or light blocking rate. In addition, when the lighting device is used without arranging the luminaire 6 (light source) in the luminaire arrangement section 27, the light blocking device 7 (louver) can be changed to a design plate or the like, and the inside of the luminaire arrangement section 27, the return opening 22o, the ceiling equipment, etc. can be visually blocked. In this case, the user does not feel uncomfortable.

[0132] Various aspects of the present disclosure are summarized below as appendices.

[0133] [Appendix 1] A device that is installed in a ceiling fixture and has an opening on the bottom and an opening for an air conditioning return on the top; A lighting fixture is disposed in the device and includes a base extending in a first horizontal direction, a power supply device installed on an upper surface of the base, a light source unit provided on a lower side of the base, and a light-transmitting portion covering the light source unit; A connector to which the lighting device is detachably attached, the connector being disposed between the device and the lighting device, the connector being attached to the device and covering the power supply device installed on the upper surface of the base; a coupling mechanism including a first coupling device provided on the connector and a second coupling device provided on the lamp and engaging with the first coupling device, the first coupling device and the second coupling device engaging with each other to couple the lamp to the connector; the connector has a connector main portion having a cross section normal to the first direction that is convex upward so as to form a space portion in which the power supply device is disposed between the connector main portion and the upper surface of the base, In a second direction that is the horizontal direction and perpendicular to the first direction, the air conditioning return opening is provided to the outside beyond both ends of the upper surface of the connector main part in the second direction. Lighting equipment. [Appendix 2] The base or the connector has a protruding portion that protrudes outward beyond both ends of the light-transmitting portion in the second direction. 2. The lighting device according to claim 1. [Appendix 3] The base has the protruding portion, The connector has a width in the second direction that is smaller than a width of the base, A pair of base protrusions extending in the first direction are provided on the upper surface of the base, The pair of base protrusions on the upper surface of the base are disposed outside both ends of the connector in the second direction. 3. The lighting device according to claim 2. [Appendix 4] A slit is formed on an end side of the base in the first direction from an end surface thereof, the light transmitting portion is a cover attached to the base, A cover claw is provided on an end side of the cover in the first direction and protrudes from the upper surface of the base through the slit, The second connector is disposed on the upper surface of the base at an end side in the first direction and has an engagement piece that engages with a tip end of the cover claw. 4. The lighting device according to claim 3. [Appendix 5] The connector has a flat plate portion extending in the second direction on the outer side of both ends of the connector main portion in the second direction, and has the protruding portion, The ends of the connector main portion on both sides in the second direction are in contact with the light transmitting portion of the lighting fixture. 3. The lighting device according to claim 2. [Appendix 6] A control device is disposed outside the connector and on the upper surface of the protruding portion. 6. The lighting device according to claim 2, [Appendix 7] A fastener is provided which penetrates the first connector and the connector main portion and fastens the first connector to the device via the connector. 7. The lighting device according to claim 1, [Appendix 8] An adjustment tool is provided on the upper part of the connector main part, and the adjustment tool adjusts the distance between the device and the connector in the vertical direction. 8. The lighting device according to claim 1, [Explanation of symbols]

[0134] 1 lighting device, 1a lighting device, 1b lighting device, 1x lighting device, 2 fixture, 2a fixture, 2b fixture, 2x fixture, 3 connection mechanism, 3a connection mechanism, 4 first connector, 5 fixing device, 5a fixing device, 6 luminaire, 6b luminaire, 7 light shielding device, 8 equipment plate, 9 support member, 9a support member, 20 housing portion, 20x housing portion, 21 side portion, 21f flange, 21x inner side portion, 22 top surface portion, 22a top surface portion, 22b top surface portion, 22o opening portion, 22x top surface portion, 23 partition plate, 24 cover body portion, 24x cover body portion, 25 fixture fixing device, 26 terminal block, 27 luminaire arrangement portion, 27x luminaire arrangement portion, 28 equipment housing portion, 29x inclined surface portion, 30 Connector, 30a Connector, 30b Connector, 31 Connector main part, 31a Connector main part, 31b Connector main part, 32 Connector side part, 32a Connector side part, 32b Connector side part, 33 Lower end part, 33b Lower end part, 34 Connector upper part, 34a Connector upper part, 34b Connector upper part, 35 Notch part, 36 Adjuster, 37 Screw insertion hole, 38 Screw, 40 First connecting and fixing part, 41 First connecting deformation part, 42 First connecting engagement part, 50 Screw, 51 Nut, 53 Screw, 60 Base, 60b Base, 61 Light source part, 61b Light source part, 62 Cover, 62b Cover, 63 Second connecting part, 63b Second connecting part, 64 Power supply unit, 64b Power supply unit, 66 Power supply line, 66b Power line, 67 Screw, 68 Control device, 69 holder, 90 nut, 91 washer, 303 overhanging portion, 305 boundary convex portion, 306 double wall portion, 307 bent portion, 310 spring mounting portion, 311 spring insertion portion, 312 screw insertion hole, 361 first fixing portion, 361h screw insertion hole, 362 second fixing portion, 362h screw insertion hole, 363 adjustment portion, 400 screw insertion hole, 600 arrangement portion, 600b arrangement portion, 601h1 through hole, 601h2 screw hole, 601h3 screw hole, 602 slit, 603 overhanging portion, 604 base groove portion, 605 base convex portion, 605h hole portion, 607 bent portion, 610 board, 620 cover main body portion, 620b Cover body, 621, cover end, 622, cover claw, 623, tip, 624, hook, 624b, hook, 630, connector main part, 631, connector opening, 634, fixing part, 635, screw insertion hole, 636, connector side part, 637, engagement part, 638, opening, 639, leg part, 646Connector side, G gap, H height dimension, L horizontal, S system ceiling, S1 area, S2 area, S3 area, S4 area, SL lighting space, SP space part, Sa area, Sb area, W1 distance, W11 distance, W12 distance, W2 distance, W3 distance, W4 distance, X arrow, Y arrow, Z arrow, θ tilt angle.

Claims

1. A device that is installed in a ceiling fixture and has an opening on the bottom and an opening for an air conditioning return on the top; a light fixture disposed in the fixture and including a base extending in a first horizontal direction, a power supply device disposed on an upper surface of the base, a light source unit disposed on a lower side of the base, and a light transmitting unit covering the light source unit; A connector to which the lighting device is detachably attached, the connector being disposed between the device and the lighting device, the connector being attached to the device and covering the power supply device installed on the upper surface of the base; a coupling mechanism including a first coupling device provided on the connector and a second coupling device provided on the lamp and engaging with the first coupling device, the first coupling device and the second coupling device engaging with each other to couple the lamp to the connector; the connector has a connector main portion having a cross section normal to the first direction that is convex upward so as to form a space portion in which the power supply device is disposed between the connector main portion and the upper surface of the base, In a second direction that is the horizontal direction and perpendicular to the first direction, the air conditioning return opening is provided to an outer side beyond both ends of the upper surface of the connector main part in the second direction. Lighting equipment.

2. The base or the connector has a protruding portion that protrudes outward beyond both ends of the light-transmitting portion in the second direction.

10. The lighting device of claim 1.

3. The base has the protruding portion, The connector has a width in the second direction that is smaller than a width of the base, A pair of base protrusions extending in the first direction are provided on the upper surface of the base, The pair of base protrusions on the upper surface of the base are disposed outside both ends of the connector in the second direction.

3. The lighting device according to claim 2.

4. A slit is formed on an end side of the base in the first direction from an end surface thereof, and the slit extends in the first direction, the light transmitting portion is a cover attached to the base, a cover claw protruding from the top surface of the base through the slit is provided on an end side of the cover in the first direction, The second connector is disposed on the upper surface of the base at an end side in the first direction and has an engagement piece that engages with a tip end of the cover claw.

4. The lighting device according to claim 3.

5. The connector has a flat plate portion extending in the second direction on the outer side of both ends of the connector main portion in the second direction, and has the protruding portion, The ends of the connector main portion on both sides in the second direction are in contact with the light transmitting portion of the lighting fixture.

3. The lighting device according to claim 2.

6. A control device is disposed outside the connector and on the upper surface of the protruding portion. The lighting device according to any one of claims 2 to 5.

7. a fastener that penetrates the first connector and the connector main portion and fixes the first connector to the appliance via the connector; 10. The lighting device of claim 1.

8. An adjustment tool is provided on the upper part of the connector main part, and the adjustment tool adjusts the distance between the device and the connector in the vertical direction.

10. The lighting device of claim 1.

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