Lighting devices and lighting fixtures

Abstract

To provide a lighting device that can be manufactured efficiently. [Solution] The lighting device (3) includes a light source unit (10), a power supply unit (400) that supplies power to the light source unit (10), a frame (20) to which the light source unit (10) and the power supply unit (400) are attached, and a cable (65) connected to the power supply unit (400). The power supply unit (400) has a power supply circuit (410) electrically connected to the cable (65), and a first holding member (450) that houses the power supply circuit (410). The first holding member (450) has a first opening (480) through which the cable (65) is disposed, the first opening (480) being a keyhole-shaped notch cut out from a first edge (451) that is an end edge of the first holding member (450).

Description

[Technical Field]

[0001] The present invention relates to a lighting device and a lighting fixture including the lighting device. [Background technology]

[0002] Patent Document 1 discloses a lighting device including a light source unit having a plurality of light-emitting elements, a power supply unit that supplies lighting power to the light source unit, and a base on which the light source unit is mounted on the front side and the power supply unit is mounted on the back side. The power supply unit includes a power supply case and a power supply board housed in the power supply case. One end of each cable is connected to the other end of each cable that is connected to a connector. The two cables are fixed to a bent piece of the power supply case via a binder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-9700 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional lighting device disclosed in Patent Document 1, when connecting a cable to a light source unit, it is necessary to connect not only the light source board and the cable but also the power supply case using a binder. This may complicate the manufacturing process of the lighting device. Furthermore, if the cable and the power supply case are not connected using a binder, the posture and / or position of the cable may be unstable when attaching the light source unit to the base, which may cause the cable to be pinched between the power supply case and the base.

[0005] The present invention was made by the inventors of the present application by focusing on the above-mentioned problem, and has an object to provide a lighting device that can be manufactured efficiently. [Means for solving the problem]

[0006] In order to achieve the above object, an illumination device according to one aspect of the present invention comprises a light source unit, a power supply unit that supplies power to the light source unit, a frame to which the light source unit and the power supply unit are attached, and a cable connected to the power supply unit, wherein the power supply unit has a power supply circuit electrically connected to the cable and a first holding member that houses the power supply circuit, and the first holding member has a first opening through which the cable is disposed, the first holding member having a keyhole-shaped first opening notched from an edge of the first holding member.

[0007] A lighting fixture according to one aspect of the present invention includes the lighting device described above and a fixture body to which the lighting device is attached. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a lighting device or the like that can be manufactured efficiently. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the lighting fixture according to the embodiment. [Figure 3] FIG. 3 is a cross-sectional view of the lighting fixture according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view of the lighting fixture according to the embodiment. [Figure 5] FIG. 5 is a partial cross-sectional view of the lighting fixture according to the embodiment. [Figure 6] FIG. 6 is a perspective view of the lighting device according to the embodiment as viewed from the cover member side. [Figure 7] FIG. 7 is a perspective view of the illumination device according to the embodiment as viewed from the back side. [Figure 8] FIG. 8 is a cross-sectional perspective view of the lighting device according to the embodiment. [Figure 9]FIG. 9 is an exploded perspective view of the lighting device according to the embodiment. [Figure 10] FIG. 10 is a diagram illustrating a method for attaching the lighting device to the lighting fixture body in the lighting fixture according to the embodiment. [Figure 11] FIG. 11 is a perspective view showing the configuration of the lighting device according to the embodiment. [Figure 12] FIG. 12 is an exploded perspective view of the power supply unit according to the embodiment. [Figure 13] FIG. 13 is a partial enlarged view showing a stopper of the first holding member according to the embodiment. [Figure 14] FIG. 14 is a partial cross-sectional view showing a state in which the first protrusion according to the embodiment is inserted into the first through hole. [Figure 15] FIG. 15 is a partial cross-sectional view showing a state in which the first fixing portion according to the embodiment is fixed to the frame. [Figure 16A] FIG. 16A is a first diagram illustrating a procedure for attaching the power supply unit to the frame according to the embodiment. [Figure 16B] FIG. 16B is a second diagram illustrating a procedure for attaching the power supply unit to the frame according to the embodiment. [Figure 17] FIG. 17 is a plan view showing the first through hole and the first horizontal portion of the first protrusion according to the embodiment side by side. [Figure 18] FIG. 18 is a plan view showing a plurality of modified examples of the first protrusion according to the embodiment. [Figure 19] FIG. 19 is a plan view showing a plurality of modified first through holes according to the embodiment. [Figure 20] FIG. 20 is a diagram showing an example of the shape of the first protrusion having an insertion guide portion. [Figure 21] FIG. 21 is a diagram showing a procedure for forming a first protrusion by inserting a part of the first holding member into a first through-hole and then bending the part. [Figure 22] FIG. 22 is a diagram showing a procedure for forming a first protrusion by inserting a part of the first holding member into the first through-hole and then bending the part by more than 90 degrees. [Figure 23A] FIG. 23A is a first diagram showing a procedure for attaching a power supply unit having first protrusions on both ends in the Y-axis direction to a frame. [Figure 23B] FIG. 23B is a second diagram showing a procedure for attaching the power supply unit having first protrusions on both ends in the Y-axis direction to the frame. [Figure 23C] FIG. 23C is a diagram showing an example of a structure in which movement of the power supply unit is restricted by a power supply stopper formed by cutting and raising a part of the frame. [Figure 24A] FIG. 24A is a first diagram showing a procedure for attaching a power supply unit having a plate-shaped first protrusion parallel to the YZ plane to a frame. [Figure 24B] FIG. 24B is a second diagram showing a procedure for attaching the power supply unit, which includes a plate-shaped first protrusion parallel to the YZ plane, to the frame. [Figure 25] FIG. 25 is a side view showing a plurality of example shapes of the plate-like first protrusions parallel to the YZ plane. [Figure 26] FIG. 26 is a diagram illustrating a configuration of a first opening and a cable included in the power supply unit according to the embodiment. [Figure 27] FIG. 27 is a perspective view showing a state in which the cable according to the embodiment is connected to and held by the power supply unit. [Figure 28] FIG. 28 is a diagram showing a number of modified examples of the first opening according to the embodiment. [Figure 29] FIG. 29 is a perspective view showing the configuration of a functional unit and its surroundings according to the embodiment. [Figure 30] FIG. 30 is an exploded perspective view of a functional unit according to an embodiment. [Figure 31] FIG. 31 is a schematic diagram showing an arrangement of cables according to the embodiment. [Figure 32] FIG. 32 is a perspective view showing a binder holding portion included in the functional unit according to the embodiment. [Figure 33] FIG. 33 is a perspective view showing a state in which a functional unit according to the embodiment collectively holds a plurality of signal lines. [Figure 34A] FIG. 34A is a schematic diagram showing a first modified example of a cable arrangement according to the embodiment. [Figure 34B] FIG. 34B is a schematic diagram showing a second modified example of the arrangement of cables according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments and modifications of the present invention will be described with reference to the drawings. Note that the embodiments and modifications described below each illustrate a specific example of the present invention. Therefore, the numerical values, components, the arrangement and connection of the components, steps, and the order of steps shown in the following embodiments and modifications are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments and modifications, components that are not described in the independent claims that represent the highest concept of the present invention will be described as optional components.

[0011] Note that each figure is a schematic diagram and is not necessarily an exact illustration. Furthermore, in each figure, substantially identical components are assigned the same reference numerals, and redundant explanations are omitted or simplified. Furthermore, in each figure, the X-axis, Y-axis, and Z-axis represent the three axes of a three-dimensional Cartesian coordinate system. In this embodiment, the Z-axis direction is the vertical direction, and the direction perpendicular to the Z-axis (the direction parallel to the XY plane) is the horizontal direction. The X-axis and Y-axis are mutually orthogonal and are both orthogonal to the Z-axis. Note that, in this specification, the terms "up" and "down" do not necessarily refer to the upward direction (vertically upward) and downward direction (vertically downward) in absolute spatial recognition. Furthermore, in this specification, the terms "substantially," "almost," and "about" mean to include manufacturing errors or dimensional tolerances. For example, "substantially," "almost," and "about" mean within ±5%. Furthermore, the drawings may be schematic diagrams in which emphasis, omission, and proportions have been appropriately adjusted to illustrate the present invention. In other words, the shapes, positional relationships, and size ratios of the components shown in the drawings may differ from the actual shapes, positional relationships, and size ratios.

[0012] (Embodiment) [General configuration of lighting fixture 1] First, the configuration of a lighting fixture 1 according to an embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a perspective view of the lighting fixture 1 according to the embodiment. FIG. 2 is an exploded perspective view of the lighting fixture 1. FIGS. 3 and 4 are cross-sectional views of the lighting fixture 1, showing a cross-section taken along a plane parallel to the short-side direction of the lighting fixture 1. FIG. 3 shows a cross-section of a portion where a power supply unit 400 is not present, and FIG. 4 shows a cross-section of a portion where a power supply unit 400 is present. FIG. 5 is a partial cross-sectional view of the lighting fixture 1, showing a cross-section taken along a plane parallel to the longitudinal direction of the lighting fixture 1. Specifically, FIG. 5 shows a cross-section of the vicinity of one of both longitudinal ends of the lighting fixture 1.

[0013] As shown in Figs. 1 to 5, the lighting fixture 1 includes a fixture body 2 and a lighting device 3 attached to the fixture body 2. The lighting device 3 is an LED unit that uses an LED as a light source, and the lighting fixture 1 is an LED light that uses the lighting device 3 as a light source.

[0014] The lighting fixture 1 and the lighting device 3 are long. The total length of the lighting fixture 1 and the lighting device 3 is, for example, 2 feet, 4 feet, or 8 feet. The total length of the lighting device 3 in this embodiment is 2 feet. Note that 1 foot (= 1 [ft]) is 304.8 [mm].

[0015] As shown in Figure 3, the lighting fixture 1, which consists of a fixture body 2 and a lighting device 3, has an overall D-shaped cross section when viewed from the longitudinal direction of the lighting fixture 1, resulting in a clean design in which the boundary between the fixture body 2 and the lighting device 3 is not noticeable.

[0016] The fixture body 2 holds the lighting device 3. The fixture body 2 is installed in a predetermined location in a building. Specifically, the lighting fixture 1 is installed in a predetermined construction material such as a ceiling or wall in a room of a building such as a facility, building, store, or residence. In this embodiment, the lighting fixture 1 is a ceiling light installed on the ceiling of a building. As an example, the lighting fixture 1 is a direct-ceiling mounted LED light, and the fixture body 2 is installed on the ceiling surface of the ceiling. In this case, the lighting fixture 1 installed on the ceiling irradiates illumination light toward the floor (floor side), with the floor direction (floor side) being the predetermined direction. The illumination light is emitted from the lighting device 3 in the lighting fixture 1.

[0017] When installing the lighting fixture 1 on a ceiling, the fixture body 2 of the lighting fixture 1 is attached to the ceiling using bolts or the like. For example, as shown in FIG. 2, a bolt 101 protruding from the ceiling is inserted into a bolt insertion hole 2d provided in the fixture body 2, and a washer 101b and a nut 101a are attached to the bolt 101 to secure the fixture body 2 to the bolt 101. Note that, depending on the construction site, the fixture body 2 may be attached using a double nut. The fixture body 2 requires a protrusion allowance for the bolt 101 (an allowance for the bolt to be retracted into the fixture body 2), and it is desirable that the surrounding area be designed so that the components of the lighting device 3 do not interfere with this.

[0018] Furthermore, components (such as the power supply unit 400 and the functional unit 600) provided on the rear side of the frame 20 of the lighting device 3 protrude from the frame 20. Therefore, it is preferable that these components are arranged so as not to interfere with (not overlap with) the bolt insertion hole 2d, the wiring insertion holes 2e1 and 2e2 (holes through which wires such as a power line and a dimming signal line drawn from the ceiling are inserted), and the power terminal block 8 provided in the fixture body 2. In particular, in a fixture body 2 having a shallow recess 2a, it is preferable that the components provided on the rear side of the frame 20 are arranged so as not to overlap the bolt insertion hole 2d, the wiring insertion holes 2e1 and 2e2, and the power terminal block 8. Note that even in a fixture body (such as a fixture body for renovation) having a deep recess used in an existing lighting fixture equipped with a fluorescent lamp, it is preferable that the components provided on the rear side of the frame 20 are arranged so as not to overlap the bolt insertion hole 2d, the wiring insertion holes 2e1 and 2e2, and the power terminal block 8. In addition, since there is a possibility that two power lines (VVF cables 61) (for input and for feed) may be placed between the wiring insertion holes 2e1, 2e2 (especially the wiring insertion hole 2e1 through which the power line is inserted) and the power terminal block 8, it is desirable to arrange the components (wiring such as power lines) provided on the back side of the frame 20 so that they do not overlap the area between the wiring insertion hole 2e1 and the power terminal block 8.

[0019] The fixture body 2 is made of metal and is formed into a long, flat box shape in the Y-axis direction by bending a metal plate, etc. Specifically, when the fixture body 2 is installed on a ceiling, it is formed so as to have an inverted Fuji shape when viewed from the Y-axis direction.

[0020] 2, the device body 2 is provided with a recess 2a having a rectangular opening surface. The recess 2a is provided in an elongated shape along the longitudinal direction of the device body 2. In other words, the shape of the recess 2a in a top view (the shape of the opening surface) is rectangular with the Y-axis direction as the longitudinal direction.

[0021] As shown in Figures 2 and 3, the appliance body 2 has an opening edge 2a1. The opening edge 2a1 (first opening edge) is an appliance body side that is a side portion in the short-side direction (X-axis direction) of the appliance body 2. The opening edge 2a1 (appliance body side) forms the edge of the opening surface of the recess 2a in the short-side direction (X-axis direction) of the appliance body 2. In other words, the outer edge of the opening edge 2a1 on the recess 2a side is the edge of the opening surface of the recess 2a. In this embodiment, the opening edge 2a1 is a flat portion whose surface is flat, and forms the opening edge surface of the recess 2a.

[0022] The opening edge 2a1 is a flat part of the metal plate that constitutes the device body 2. As an example, the opening edge 2a1 has a long, narrow rectangular shape in a top view, with its longitudinal direction aligned in the Y-axis direction. In this case, the long side of the opening edge 2a1 is the long side of the rectangular opening surface of the recess 2a, with its longitudinal direction aligned in the Y-axis direction.

[0023] The opening edges 2a1 are formed on both ends in the short-side direction (X-axis direction) of the device body 2. That is, the opening edges 2a1 are formed on both sides in the short-side direction (width direction) of the opening surface of the recess 2a. Therefore, in the X-axis direction, the pair of opening edges 2a1 sandwich the opening surface of the recess 2a.

[0024] 1 and 2, the device body 2 has not only an opening edge 2a1 but also an opening edge 2a2 (second opening edge). The opening edge 2a2 is a device body end that is an end portion of the device body 2 in the longitudinal direction (Y-axis direction). The opening edge 2a2 forms the edge of the opening surface of the recess 2a in the longitudinal direction (Y-axis direction) of the device body 2. In other words, the edge of the opening edge 2a2 on the recess 2a side is the edge of the opening surface of the recess 2a. In this embodiment, the opening edge 2a2 is a flat portion whose surface is flat and forms the opening edge surface of the recess 2a.

[0025] Like the opening edge 2a1, the opening edge 2a2 is a part of the metal plate that constitutes the device body 2 and has a flat plate shape. As an example, the opening edge 2a2 has a rectangular shape in a top view with its longitudinal direction in the X-axis direction. In this case, the long side of the opening edge 2a2 is the short side of the rectangular opening surface of the recess 2a with its longitudinal direction in the Y-axis direction.

[0026] The opening edges 2a2 are formed at both ends in the longitudinal direction (Y-axis direction) of the device body 2. That is, the opening edges 2a2 are formed on both longitudinal sides of the opening surface of the recess 2a. Therefore, in the Y-axis direction, the pair of opening edges 2a2 sandwich the opening surface of the recess 2a.

[0027] In this embodiment, the opening edge 2a1 on the side of the appliance body overlaps the end of the opening edge 2a2 on the end of the appliance body in the X-axis direction. Therefore, the surface of the opening edge 2a2 is set back toward the bottom of the recess 2a from the surface of the opening edge 2a1 by the thickness of the opening edge 2a1. In other words, the opening edge 2a2 is set back from the opening edge 2a1 by the plate thickness of the opening edge 2a1. As a result, a step corresponding to the plate thickness is formed at the boundary between the opening edges 2a1 and 2a2. Note that the width of the opening edge 2a1 is narrower than the width of the opening edge 2a2, but this is not limited to this.

[0028] The pair of opening edges 2a1 and the pair of opening edges 2a2 form a flat portion formed in a rectangular frame shape when viewed from above. The area surrounded by the pair of opening edges 2a1 and the pair of opening edges 2a2 forms the rectangular opening surface of the recess 2a.

[0029] The fixture body 2 also has inclined surface portions 2b on both sides of the recess 2a in the X-axis direction (width direction) of the fixture body 2. Each inclined surface portion 2b extends from the opening edge 2a1 (the fixture body side) and has an inclined surface that slopes toward the ceiling as it extends outward. This inclined surface may function as a reflective surface.

[0030] The recess 2a of the fixture body 2 is a portion where the lighting device 3 is attached. Specifically, the recess 2a is a storage portion where the lighting device 3 is stored, and is provided over substantially the entire length of the fixture body 2, excluding the opening edge 2a2 (fixture body end). As shown in FIG. 3, in this embodiment, the recess 2a has a substantially U-shaped cross section and has a pair of opposing side portions and a bottom portion. The pair of side portions are a pair of side walls erected on the bottom portion. As shown in FIG. 2, two slits 2c are provided on one of the pair of side portions of the recess 2a.

[0031] The lighting device 3 is fitted into the recess 2a of the fixture body 2. Specifically, the lighting device 3 is attached to the fixture body 2 so as to cover the recess 2a of the fixture body 2. In this embodiment, the lighting device 3 is detachably attached to the recess 2a of the fixture body 2. Therefore, the lighting device 3 can be attached to the recess 2a of the fixture body 2, and the lighting device 3 attached to the recess 2a of the fixture body 2 can be detached from the recess 2a.

[0032] Although details will be described later, the lighting device 3 and the fixture body 2 can be fixed by hooking and engaging a hook fitting 5 and an elastic holding member 6 (a kick spring in this embodiment) provided on the lighting device 3 onto the fixture body 2. The hook fitting 5 is a fitting for attaching the lighting device 3 to the fixture body 2. In this embodiment, the hook fitting 5 is a sliding fitting. The hook fitting 5 includes a fitting base 5a fixed to the frame 20, and a fitting tip portion 5b attached so as to be movable in the X-axis direction relative to the fitting base 5a.

[0033] The means for attaching the lighting device 3 to the fixture body 2 is not limited to the use of the hook metal fitting 5 and the elastic holding member 6 made of a kick spring. For example, the lighting device 3 and the fixture body 2 may be attached using other spring members such as a single torsion spring, a double torsion spring, or a leaf spring, or may be attached using attachment members other than spring members such as screws or latches. Furthermore, the spring member such as a kick spring and the spring receiving metal fitting that receives the spring member may be provided on either the fixture body 2 or the lighting device 3. In other words, the spring member may be provided on the fixture body 2 and the spring receiving metal fitting may be provided on the lighting device 3, or the spring member may be provided on the lighting device 3 and the spring receiving metal fitting may be provided on the fixture body 2.

[0034] 4, the lighting device 3 emits light using power supplied from a power supply unit 400 housed in the fixture body 2. The power supply unit 400 is a device for supplying power to the light source section 10 of the lighting device 3.

[0035] The power supply unit 400 is disposed on the rear side of the lighting device 3. Specifically, the power supply unit 400 is disposed in the recess 2a of the fixture body 2. That is, the power supply unit 400 is housed in the recess 2a of the fixture body 2. In this embodiment, the power supply unit 400 is attached to the lighting device 3 as a part of the lighting device 3 and is integrated with the lighting device 3. Note that the power supply unit 400 may not be integrated with the lighting device 3, but may be disposed in the fixture body 2 separately from the lighting device 3. For example, the power supply unit 400 may be fixed to the fixture body 2.

[0036] The power supply unit 400 includes a power supply circuit 410 that generates power for illuminating the lighting device 3. Specifically, the power supply circuit 410 of the power supply unit 400 includes a circuit board 411 such as a printed wiring board and a plurality of electronic components 415 mounted on the circuit board 411. In this embodiment, the power supply unit 400 further includes a first holding member 450 that houses the power supply circuit 410. The first holding member 450 is a power supply case that houses the power supply circuit 410, or a cover that covers the power supply circuit 410. As an example, the first holding member 450 is a metal housing made of a metal plate. Note that at least a portion of the first holding member 450 may be formed of a non-metallic material such as resin. The power supply circuit 410 of the power supply unit 400 converts AC power from an external power source such as a commercial power source into DC power at a predetermined level by rectifying, smoothing, and stepping down the AC power, and supplies the DC power to the LEDs of the lighting device 3.

[0037] AC power is supplied to the power supply unit 400 via a power supply terminal block 8 (see FIG. 2 ) to which a power line (such as a VVF cable 61) is connected, the power line being inserted from the ceiling into a through-hole (wiring insertion hole 2e1) in the fixture body 2 and drawn into the recess 2a of the fixture body 2. Specifically, the power supply terminal block 8 includes a power supply input section 8a to which the VVF cable 61 inserted into the wiring insertion hole 2e1 is connected, and a power supply output section 8b to which internal wiring (not shown) connected to the power supply unit 400 is connected. The power supply line such as the VVF cable 61 connected to the power supply input section 8a of the power supply terminal block 8 is an electric wire for construction work. The power supply terminal block 8 is installed in the recess 2a of the fixture body 2.

[0038] Furthermore, when connecting the power supply terminal block 8 and the power supply unit 400 via a power line, a connector provided at one end of the power supply line, one end of which is connected to the power output section 8b of the power supply terminal block 8, may be inserted into a socket (power connector 420, described later using FIG. 12) on the power supply unit 400, or a connector provided at the other end of the power supply line, one end of which is connected to the power supply terminal block 8, may be connected to a connector provided at the other end of the power supply line, one end of which is connected to the power supply unit 400, or a connector provided at the other end of the power supply line, one end of which is connected to the power supply unit 400, may be inserted into a socket (power output section 8b) on the power supply terminal block 8, or the power supply terminal block 8 provided on the lighting device 3 and the power supply unit 400 may be connected via a power line, and the VVF cable 61 from the ceiling may be connected to the power supply terminal block 8, or an output wire drawn from the power supply unit 400 may be directly connected to the VVF cable 61 from the ceiling.

[0039] Next, the detailed structure of the lighting device 3 will be described using Figs. 6 to 9 while referring to Figs. 1 to 5. Fig. 6 is a perspective view of the lighting device 3 according to the embodiment when viewed from the cover member 30 side, and Fig. 7 is a perspective view of the lighting device 3 when viewed from the back side. In Fig. 7, a cable 65 connecting the functional unit 600 and the power supply unit 400 is schematically represented by a dashed line. Fig. 8 is a cross-sectional perspective view of the lighting device 3. Fig. 9 is an exploded perspective view of the lighting device 3.

[0040] 2, 6, and 7, the illumination device 3 is a long linear light source called a light bar. The illumination device 3 emits light of a predetermined color, such as white light, as illumination light.

[0041] As shown in FIGS. 3, 8 and 9, the lighting device 3 includes a light source unit 10, a frame 20 on which the light source unit 10 is disposed, a cover member 30 that covers the light source unit 10, and an end cap 40.

[0042] In this embodiment, the lighting device 3 also includes a power supply unit 400. That is, the power supply unit 400 is provided in the lighting device 3. Specifically, the power supply unit 400 is attached to the ceiling-side surface of the frame 20. For example, as shown in FIG. 4 , the power supply unit 400 is fixed to the frame 20 by fastening a part of a first holding member 450 to a main plate portion 21 of the frame 20 with a fastening member 50, which is a screw. Specifically, the first holding member 450 is a housing having an opening, and is composed of a bottom plate and side plates standing on the bottom plate. The first holding member 450 is arranged so that the opening of the first holding member 450 is located on the frame 20 side. That is, the portion of the first holding member 450 facing the frame 20 is open.

[0043] The following describes in detail each component that makes up the lighting device 3.

[0044] The light source unit 10 is a light-emitting unit that emits illumination light. In this embodiment, the light source unit 10 is elongated. In this case, the elongated light source unit 10 may be a single light source unit having a length substantially equal to the overall length of the frame 20 in the longitudinal direction (Y-axis direction), or a plurality of light source units 10 may be arranged along the longitudinal direction of the frame 20. As shown in FIG. 9, in this embodiment, two light source units 10 are arranged along the longitudinal direction of the frame 20.

[0045] The light source unit 10 is an LED module using LEDs, and as shown in Figures 8 and 9, it comprises a substrate 11 and LEDs 12 arranged on the substrate 11.

[0046] The substrate 11 is a mounting substrate for mounting the LEDs 12. In this embodiment, the substrate 11 is formed in a substantially rectangular shape that is elongated in the longitudinal direction (Y-axis direction) of the frame 20. The thickness of the substrate 11 is, for example, 1.0 mm. As shown in FIG. 9, in this embodiment, the substrates 11 are arranged along the longitudinal direction of the frame 20.

[0047] Substrate 11 is, for example, a printed wiring board (printed circuit board) on which metal wiring is formed in a predetermined pattern. Note that a resist made of an insulating resin material may be formed on the surface of substrate 11 so as to cover the wiring in order to protect the wiring and ensure a dielectric strength voltage. Substrate 11 may be a single-sided wiring board in which wiring is formed only on the main surface on which LEDs 12 are mounted, or a double-sided wiring board in which wiring is formed on both sides.

[0048] The base material constituting the substrate 11 may be a resin substrate made of an insulating resin material, a ceramic substrate made of a sintered body of a ceramic material such as alumina, or a metal-based substrate obtained by applying an insulating coating to the surface of a metal base material made of a metal material such as aluminum or copper.

[0049] When the substrate 11 is made of a resin substrate, examples of the resin substrate that can be used include a glass epoxy substrate (CEM-3, FR-4, etc.) made of glass fiber and epoxy resin, a paper phenol substrate (FR-1, FR-2) made of kraft paper or the like and phenol resin, a paper epoxy substrate (FR-3) made of paper and epoxy resin, or a polyimide substrate made of polyimide, etc. The substrate 11 may be a rigid substrate or a film-like flexible substrate.

[0050] The metal wiring formed on the substrate 11 is electrically connected to the power supply unit 400. Specifically, in this embodiment, as shown in FIG. 9 , a pair of electrodes 13 a and 13 b arranged on the substrate 11 are connected to a conductive portion 429, which is a light source connector provided in the power supply unit 400, by a pair of connection pins 15. This allows the multiple LEDs 12 provided in the light source unit 10 to receive DC power for light emission from the power supply unit 400. Instead of the connection pins 15, for example, a conductive member having a plate shape or a prism shape may be used. The substrate 11 and the power supply unit 400 may be connected by an electric wire such as a lead wire. In this case, the electric wire may be inserted, for example, into a through hole provided in the frame 20. The conductive portion 429 is one of multiple electronic components 415 (see FIG. 4 ) provided in the power supply circuit 410.

[0051] The substrate 11 is disposed on the frame 20. The substrate 11 has a first surface on which the LEDs 12 are mounted, and a second surface facing away from the first surface. The first surface of the substrate 11 is the surface facing the cover member 30, and the second surface of the substrate 11 is the surface facing the frame 20. In this embodiment, the second surface of the substrate 11 is in contact with the frame 20.

[0052] As shown in FIGS. 8 and 9 , LEDs 12 are arranged on the substrate 11. Specifically, a plurality of LEDs 12 are arranged on a first surface of the substrate 11. In this embodiment, the plurality of LEDs 12 are mounted linearly in a row along the longitudinal direction (Y-axis direction) of the substrate 11 at predetermined intervals. Specifically, the plurality of LEDs 12 are mounted over substantially the entire length of the substrate 11 in the longitudinal direction. Therefore, the plurality of LEDs 12 are mounted along the longitudinal direction of the frame 20 and the cover member 30. Note that the plurality of LEDs 12 may be mounted in multiple rows along the longitudinal direction of the substrate 11, rather than in a single row. The plurality of LEDs 12 emit light when a direct current is supplied from the power supply unit 400 via a conductive member (a pair of connection pins 15 in this embodiment) that connects the power supply unit 400 and the substrate 11.

[0053] The LED 12 is an example of a light-emitting element. In this embodiment, each of the LEDs 12 is an individually packaged LED element (LED light source) with an SMD structure. Therefore, the light source unit 10 is an SMD-type LED module.

[0054] The SMD-type LED 12 includes a white resin or ceramic container (package), an LED chip (bare chip) placed in the container, and a sealing material that seals the LED chip. In this embodiment, the LED 12 is a white LED element that emits white light. In this case, for example, a blue LED chip that emits blue light when powered is used as the LED chip, and a silicone resin (phosphor-containing resin) containing a yellow phosphor such as YAG is used as the sealing material filled into the container.

[0055] The light source section 10 configured in this manner is disposed on a frame 20. Specifically, the substrate 11 of the light source section 10 is disposed on the frame 20.

[0056] The frame 20 is an elongated mounting member (base member) to which the light source section 10 is attached. Specifically, the substrate 11 of the light source section 10 is attached to the frame 20.

[0057] The frame 20 is formed in an elongated shape in the Y-axis direction, similar to the light source unit 10 and the fixture body 2. The light source unit 10 is supported by the frame 20. That is, the frame 20 is a support member that supports the light source unit 10. In the present embodiment, the frame 20 not only supports the light source unit 10, but also supports the cover member 30. Specifically, the board 11 on which the LEDs 12 are arranged is placed on the frame 20 and fixed to the frame 20, whereby the board 11 on which the LEDs 12 are arranged is supported by the frame 20.

[0058] The frame 20 is plate-shaped. In this embodiment, the frame 20 is made of metal and is configured of a metal plate. The frame 20 is formed into a predetermined shape by, for example, performing roll forming and / or press working on a single sheet of metal (metal plate) made of SPCC (Steel Plate Cold Commercial; cold-rolled steel plate). The thickness of the metal plate configuring the frame 20 is, for example, 0.2 mm to 2 mm. In this embodiment, the frame 20 is formed by sheet metal working, so the thickness of the metal plate configuring the frame 20 is preferably 1 mm or less. Specifically, the thickness of the metal plate configuring the frame 20 is set to 0.5 mm. Note that the method for manufacturing the frame 20 is not limited to roll forming and press working, and may also be aluminum extrusion molding, etc.

[0059] 3 and 4, the plate-like frame 20 has a main plate portion 21, a pair of upright plate portions 22, a pair of horizontal plate portions 23, and a pair of side plate portions 24. As shown in Fig. 9, the main plate portion 21, the pair of upright plate portions 22, the pair of horizontal plate portions 23, and the pair of side plate portions 24 all extend along the longitudinal direction (Y-axis direction) of the frame 20. Also, as shown in Figs. 3 and 4, in this embodiment, the frame 20 is formed symmetrically in the XZ cross section with respect to the center of the frame 20 in the short side direction, but this is not limited to this.

[0060] The main board 21 is the main body of the frame 20. The main board 21 is a plate-like body that is generally flat and has a constant thickness. As shown in FIG. 3 , the light source 10 is disposed on the main board 21. Specifically, a board 11 on which LEDs 12 are disposed is placed on the main board 21. In other words, the main board 21 supports the board 11. In this embodiment, the board 11 and the main board 21 are in contact with each other. The LEDs 12 of the light source 10 are disposed in the center of the main board 21 in the width direction, but this is not limited to this.

[0061] Main board 21 has a first surface which faces substrate 11, and a second surface facing away from the first surface. In this embodiment, the first surface of main board 21 is a board mounting surface to which board 11 is attached. When lighting fixture 1 is installed on a ceiling, frame 20 is positioned so that the first and second surfaces of main board 21 are approximately parallel to the ceiling surface. In this case, the first surface of main board 21 is the surface facing the floor, and the second surface of main board 21 is the surface facing the ceiling.

[0062] 3, the main plate 21 is located closer to the ceiling than the opening of the recess 2a of the fixture body 2 (i.e., closer to the bottom of the recess 2a). In this embodiment, the LEDs 12 are also located closer to the bottom of the recess 2a than the opening of the recess 2a of the fixture body 2. Specifically, the main plate 21 and the LEDs 12 are located closer to the ceiling than the opening edge 2a1 of the recess 2a. This increases the distance between the cover member 30 and the LEDs 12, thereby reducing uneven brightness (graininess) of the linearly arranged LEDs 12.

[0063] As shown in FIGS. 8 and 9, the main plate portion 21 is formed with a first claw piece 21a and a second claw piece 21b, which are formed by cutting and raising a part of the frame 20 made of a metal plate.

[0064] The substrate 11 placed on the main plate 21 has a first recess 11a that engages with the first claw piece 21a and a second recess 11b that engages with the second claw piece 21b. The first claw piece 21a is formed in a substantially L-shape when viewed from the X-axis direction, and restricts movement of the substrate 11 in the positive Y-axis direction and the positive Z-axis direction. The second claw piece 21b is formed in a substantially rectangular shape when viewed from the X-axis direction, and restricts movement of the substrate 11 in the negative Y-axis direction. Furthermore, since multiple first claw pieces 21a and at least one second claw piece 21b are arranged on both sides of the substrate 11 in the X-axis direction, movement of the substrate 11 in the X-axis direction is restricted by these claw pieces. More specifically, when the substrate 11 is mounted on the main plate 21, for example, the substrate 11 is placed on the main plate 21 so that the first claws 21a are inserted into the first recesses 11a with the two second claws 21b not raised, i.e., the two second claws 21b are parallel to the XY plane. Next, the substrate 11 is slid relative to the main plate 21 in the positive direction of the Y axis to engage the first recesses 11a of the substrate 11 with the first claws 21a. After that, the two second claws 21b are raised to position the two second claws 21b parallel to the ZY plane. This results in the second claws 21b being inserted into the two second recesses 11b, respectively. As a result, movement of the substrate 11 relative to the main plate 21 in the X-axis, Y-axis, and Z-axis directions is restricted. That is, the substrate 11 is substantially fixed to the main plate 21. The substrate 11 may be fixed to the main plate 21 by locking the longitudinal end of the substrate 11 with another claw, or by crimping the first claw 21a to lock the substrate 11 to the first claw 21a. The method of fixing the main plate 21 and the substrate 11 is not limited to the locking structure using the first claw 21a and the second claw 21b. The main plate 21 and the substrate 11 may be bonded and fixed with an adhesive or adhesive tape. Although the main plate 21 and the substrate 11 are in contact with each other, this is not limiting. For example, a separate member such as a thermally conductive sheet may be inserted between the main plate 21 and the substrate 11.

[0065] The main board 21 is also provided with a light source through hole 120 through which a pair of connection pins 15 are inserted for electrically connecting the wiring of the substrate 11 and the power supply unit 400. A film member 29 is arranged on the main board 21 to cover the light source through hole 120. The pair of connection pins 15 are inserted into a pair of pin insertion holes 429a (see FIG. 12 , described later) of a conductive portion 429 of the power supply unit 400 by breaking through the film member 29 or by being inserted into a pair of pin holes of the film member 29. That is, the pair of electrodes 13a and 13b arranged on the substrate 11 and the power supply unit 400 are electrically connected by the pair of connection pins 15. In this case, the light source through hole 120 is kept covered by the film member 29, and therefore, for example, foreign matter such as insects or dust is prevented from entering the space region S2 formed between the cover member 30 and the frame 20 through the light source through hole 120. Any foreign matter that enters the spatial region S2 may block the light emitted by the light source unit 10, and therefore may be visually recognized as a shadow. In other words, if a foreign matter such as an insect enters the spatial region S2, the quality of the illumination light emitted by the lighting device 3 may be reduced. Therefore, preventing foreign matter from entering the spatial region S2 is useful, for example, from the perspective of maintaining or improving the quality of the illumination light. The film member 29 is, for example, an adhesive sheet having an adhesive layer on one side.

[0066] The pair of standing plate portions 22 are standing plate portions that stand upright on the main plate portion 21. Specifically, the pair of standing plate portions 22 stand upright from one end of the main plate portion 21, and the other of the pair of standing plate portions 22 stands upright from the other end of the main plate portion 21. The standing plate portions 22 and the horizontal plate portions 23 are provided between the main plate portion 21 and the side plate portions 24. Each of the pair of standing plate portions 22 is flat.

[0067] 3, in this embodiment, the main surface of each of the pair of standing plate portions 22 is perpendicular to the main surface of the main plate portion 21, and extends in a direction perpendicular to the short side direction of the frame 20. In other words, the standing plate portion 22 is provided perpendicular to the main plate portion 21. Specifically, each of the pair of standing plate portions 22 extends along the Z-axis direction. Note that the standing plate portion 22 may be formed so as to be inclined with respect to the main plate portion 21.

[0068] As shown in Figures 3 and 4, the recess 20a is formed by a main plate portion 21 and a pair of standing plate portions 22. The bottom of the recess 20a is the main plate portion 21. Therefore, the board 11 on which the LEDs 12 are mounted is placed on the bottom (main plate portion 21) of the recess 20a. In this manner, the frame 20 has the recess 20a on which the board 11 is placed. In addition, the side portions of the recess 20a are the standing plate portions 22. In this embodiment, the cross-sectional shape of the recess 20a is U-shaped. In other words, the cross-sectional shape of the spatial region of the recess 20a (the region surrounded by the main plate portion 21 and the pair of standing plate portions 22) is rectangular.

[0069] The cross-sectional shape of the recess 20a does not have to be U-shaped. In other words, the cross-sectional shape of the spatial region of the recess 20a does not have to be rectangular. For example, the cross-sectional shape of the spatial region of the recess 20a may be trapezoidal. In this case, the main plate portion 21 corresponds to the lower or upper base of the trapezoidal recess 20a, and the standing plate portion 22 corresponds to the side of the trapezoidal recess 20a that is inclined relative to the main plate portion 21.

[0070] The light source unit 10, which is disposed at the bottom of the recess 20a, is accommodated in the recess 20a. In this embodiment, the depth of the recess 20a is greater than the height (thickness) of the light source unit 10, and the light source unit 10 is accommodated so as not to protrude from the recess 20a. That is, the LED 12 is accommodated in the recess 20a. Therefore, the floor-side end (light-emitting surface) of the LED 12 of the light source unit 10 is located closer to the ceiling than the opening of the recess 20a. In this case, the floor-side end of the LED 12 may be located at a position set back from the opening of the recess 20a or may be flush with the opening of the recess 20a. By accommodating the LED 12 in the recess 20a in this way, the distance between the LED 12 and the main portion 31 of the cover member 30 can be increased, thereby suppressing uneven brightness (graininess) caused by the multiple LEDs 12 arranged at intervals in the longitudinal direction of the frame 20.

[0071] In the present embodiment, the LEDs 12 of the light source unit 10 are housed in the recess 20a so as not to protrude from the recess 20a in the Z-axis direction, but this is not limited thereto. For example, some or all of the LEDs 12 may protrude from the recess 20a. Even in this case, the substrate 11 of the light source unit 10 should be disposed so as not to protrude from the recess 20a, and the depth of the recess 20a should be greater than the thickness of the substrate 11 of the light source unit 10.

[0072] As shown in FIG. 4, when the depth of the recess 20a of the frame 20 is a [mm] and the width of the recess 20a is w1 [mm], the relationship w1 ≥ 10 × a is preferably satisfied. In other words, the ratio of the depth a of the recess 20a to the width w1 of the recess 20a is preferably 1:10 or greater. This prevents the light emitted from the LED 12 from being blocked by the corners of the opening of the recess 20a (the connection between the vertical plate portion 22 and the horizontal plate portion 23) even when the light source unit 10 is housed in the recess 20a. In other words, by satisfying w1 ≥ 10 × a, the light emitted from the LED 12 is less likely to be blocked. In this case, when the width of the recess 20a is w1 [mm] and the width of the horizontal plate portion 23 is w2 [mm], the relationship w1 > 2 × w2 is preferably satisfied.

[0073] Furthermore, frame 20 has protrusion 20b that protrudes from main board 21 toward the light emission side of light source 10. In other words, when lighting fixture 1 is installed on a ceiling, protrusion 20b of frame 20 protrudes toward the floor.

[0074] A pair of protrusions 20b are provided on both sides of the main plate portion 21 in the short direction of the frame 20. By forming the recess 20a in the frame 20, a pair of protrusions 20b are formed on the frame 20. In this embodiment, the recess 20a is formed to be recessed toward the ceiling, and therefore each of the pair of protrusions 20b is formed to protrude toward the floor. Each of the pair of protrusions 20b is composed of a horizontal plate portion 23 and a standing plate portion 22. In this way, by forming the protrusions 20b on the main plate portion 21, the strength of the frame 20 can be improved. The recess 20a and the pair of protrusions 20b can be formed by deforming a metal plate constituting the frame 20 by press working or the like. Specifically, the recess 20a and the protrusions 20b are formed by bending a metal plate. Therefore, the plate thicknesses of the main plate portion 21, the standing plate portion 22, the horizontal plate portion 23, and the side plate portions 24 are the same.

[0075] The horizontal plate portions 23 are located to the sides of the recessed portion 20a. In this embodiment, the horizontal plate portions 23 are located on both sides of the recessed portion 20a in the short-side direction of the frame 20. That is, a pair of horizontal plate portions 23 are formed to sandwich the recessed portion 20a. Specifically, one of the pair of horizontal plate portions 23 is located on one side of the recessed portion 20a in the short-side direction of the frame 20, and the other of the pair of horizontal plate portions 23 is located on the other side of the recessed portion 20a in the short-side direction of the frame 20. That is, one of the pair of horizontal plate portions 23 is located on one side of the main plate portion 21 in the short-side direction of the frame 20, and the other of the pair of horizontal plate portions 23 is located on the other side of the main plate portion 21 in the short-side direction of the frame 20. Each of the pair of horizontal plate portions 23 is connected to the floor-side end of the upright plate portion 22 and extends outward from the floor-side end of the upright plate portion 22.

[0076] Furthermore, when a first direction, which is the direction of the light emission side of the light source unit 10 (LEDs 12) with respect to the main board unit 21, is defined as the floor-side direction, and a second direction, which is the direction opposite to the floor-side direction (first direction) with respect to the main board unit 21, is defined as the ceiling-side direction (i.e., the construction material side), at least a portion of each of the pair of horizontal board units 23 is located closer to the floor (first direction) than the main board unit 21. In this embodiment, the entire horizontal board unit 23 is located closer to the floor than the main board unit 21. Therefore, a pair of protruding units 20b, each composed of an upright board unit 22 and a horizontal board unit 23, is located closer to the floor than the main board unit 21. As a result, a spatial region is formed on the ceiling side of each protruding unit 20b. The spatial region is a region surrounded by the protruding units 20b on the ceiling side of the frame 20. In other words, this spatial region is a region surrounded by the upright board unit 22 and the horizontal board unit 23 on the ceiling side of the frame 20. In this embodiment, the side plate portion 24 is provided on the horizontal plate portion 23 opposite the standing plate portion 22, so this spatial region is an area surrounded by the standing plate portion 22, the horizontal plate portion 23, and the side plate portion 24, and is a concave recessed portion recessed toward the floor. As will be described in detail later, this spatial region may house internal electric wires, construction electric wires (external electric wires), structural members such as springs and screws, or functional parts. In particular, the presence of the side plate portion 24 as the outer wall of this spatial region makes it difficult for the internal electric wires housed in the spatial region to protrude from the spatial region. This prevents the internal electric wires from protruding and becoming trapped.

[0077] Furthermore, this spatial region may accommodate not only one internal wire but also multiple internal wires. The one or more internal wires accommodated in this spatial region are fixed to the frame 20 with a fixing member such as tape or metal fittings. In this case, this spatial region may be utilized to attach tape or to attach metal fittings. For example, when fixing the internal wires using metal fittings, the metal fittings are fixed to the spatial region so as to cover the spatial region in which the internal wires are accommodated. In this case, the metal fittings may be positioned between the upright plate portion 22 and the side plate portion 24 so as to be stretched.

[0078] The internal wires do not have to be stored in this spatial region. In this case, the internal wires may be arranged on the ceiling-facing surface of the main board portion 21 of the frame 20 and adhesively fixed with tape. However, if the tape is attached only to the main board portion 21, the tape is likely to peel off. Therefore, in this case, it is advisable to attach the tape by utilizing this spatial region. For example, it is advisable to arrange the internal wires on the ceiling-facing surface of the main board portion 21 and attach the tape so that it spans the main board portion 21 and the standing board portion 22. In this way, the tape is attached to two surfaces facing in different directions, which makes it possible to prevent the tape from peeling off.

[0079] As shown in the enlarged view of FIG. 3, each of the pair of horizontal plate portions 23 is composed of a plurality of plate portions. In this embodiment, the horizontal plate portion 23 is composed of two plate portions, and the plurality of plate portions include a curved plate portion 23a (first plate portion) connected to the standing plate portion 22 and an inclined plate portion 23b (second plate portion) inclined with respect to the main plate portion 21. In other words, the protruding portion 20b has the curved plate portion 23a and the inclined plate portion 23b. The inclined plate portion 23b is flat. Note that the standing plate portion 22 and the inclined plate portion 23b may be connected by a flat plate portion. For example, the protruding portion 20b may include a parallel plate portion parallel to the main plate portion 21 and an inclined plate portion 23b inclined with respect to the main plate portion 21.

[0080] In the horizontal plate portion 23, the curved plate portion 23a is disposed closer to the light source unit 10 in the short-side direction (width direction) of the frame 20 than the inclined plate portion 23b, and the inclined plate portion 23b extends in a direction inclined with respect to the short-side direction of the frame 20. In this embodiment, the inclined plate portion 23b is inclined so as to widen toward the ceiling. Therefore, the protruding portion 20b formed by the standing plate portion 22 and the horizontal plate portion 23 is configured to be inclined outward as a whole. The inclined plate portion 23b is located outside the curved plate portion 23a and is connected to the end of the side plate portion 24. In this embodiment, the length of the inclined plate portion 23b in the short-side direction of the frame 20 is longer than the length of the curved plate portion 23a.

[0081] 3 and 4, at least a portion of the pair of protrusions 20b formed on the frame 20 is located closer to the floor than the opening surface of the recess 2a of the fixture body 2. In other words, at least a portion of the pair of protrusions 20b is located closer to the floor than the opening edge 2a1 of the recess 2a of the fixture body 2. In this embodiment, the pair of horizontal plate portions 23 are located closer to the floor than the opening surface of the recess 2a of the fixture body 2. Specifically, both the curved plate portion 23a and the inclined plate portion 23b of the horizontal plate portion 23 are located closer to the floor than the opening surface of the recess 2a.

[0082] The protruding portion 20b, which is composed of the horizontal plate portion 23 and the standing plate portion 22, may be configured to be inclined inward. In this case, the inclined plate portion 23b of the horizontal plate portion 23 is located inside the curved plate portion 23a and is connected to the end of the main plate portion 21, and the standing plate portion 22 is located outside the curved plate portion 23a of the horizontal plate portion 23 and is connected to the end of the side plate portion 24.

[0083] As shown in FIGS. 3 and 4, the pair of side plate portions 24 are plate-shaped side portions and are formed as a pair of legs (feet) on the frame 20. Each of the pair of side plate portions 24 extends toward the side opposite to the light emission side of the light source unit 10. The pair of side plate portions 24 are extending portions that extend toward the construction material on which the fixture main body 2 is installed. In the present embodiment, the construction material on which the fixture main body 2 is installed is the ceiling, and the fixture main body 2 is installed on the ceiling. Therefore, the pair of side plate portions 24 extend toward the ceiling side (second direction side). Specifically, each of the pair of side plate portions 24 extends linearly along the Z-axis direction.

[0084] When the lighting device 3 is attached to the fixture body 2, the pair of side plates 24 are housed in the recesses 2a of the fixture body 2. Each side plate 24 faces a side surface of the recess 2a. Each of the pair of side plates 24 extends along a corresponding side surface (side wall) of the pair of recesses 2a. As shown in FIG. 3, the side plates 24 and the side surfaces of the recesses 2a are parallel to each other.

[0085] Each of the pair of side plates 24 extends from each of the pair of protruding portions 20b toward the ceiling. In this embodiment, each of the pair of side plates 24 extends toward the ceiling from an end of the horizontal plate portion 23. One of the pair of side plates 24 extends toward the ceiling from an outer end of one of the pair of horizontal plate portions 23, and the other of the pair of side plates 24 extends toward the ceiling from an outer end of the other of the pair of horizontal plate portions 23. In other words, the pair of side plates 24 extend toward the ceiling from the outer end of the protruding portion 20b in the short direction of the frame 20. Specifically, each of the pair of side plates 24 is connected to the inclined plate portion 23b of the horizontal plate portion 23 and extends toward the ceiling from the end of the inclined plate portion 23b.

[0086] Each of the pair of side plate portions 24 extends from the outer end of the corresponding horizontal plate portion 23 toward the ceiling, beyond the position of the main plate portion 21. Therefore, the tip of each side plate portion 24 (extending portion) is located closer to the ceiling (in the second direction) than the main plate portion 21. In other words, the tip of the side plate portion 24 (extending portion) is located closer to the ceiling than the bottom of the recess 20a. In this embodiment, the side plate portions 24 are connected to the inclined plate portions 23b of the horizontal plate portions 23. Note that the side plate portions 24 are not formed at both longitudinal ends of the frame 20, and the longitudinal ends of the frame 20 are open.

[0087] As shown in the enlarged view of FIG. 3, the connection portion P1 between the side plate portion 24 and the horizontal plate portion 23 (in this embodiment, the connection portion between the side plate portion 24 and the inclined plate portion 23b) is preferably located closer to the floor (first direction side) than the main plate portion 21, which is the bottom of the recessed portion 20a in the frame 20. This makes it easier for the light emitted from the LED 12 to wrap around to the spatial region formed near the outer end portion 31a of the cover member 30. Note that if the connection portion P1 between the side plate portion 24 and the horizontal plate portion 23 is located closer to the ceiling than the bottom of the recessed portion 20a, the light emitted from the LED 12 will wrap around to the ceiling side, causing light leakage and light loss.

[0088] Furthermore, the connection portion P1 between the side plate portion 24 and the horizontal plate portion 23 (in this embodiment, the connection portion between the side plate portion 24 and the inclined plate portion 23b) is at approximately the same height as the opening edge 2a1 of the recessed portion 2a of the fixture body 2, but the connection portion P1 between the side plate portion 24 and the horizontal plate portion 23 may be located closer to the ceiling than the opening edge 2a1 of the recessed portion 2a of the fixture body 2. This makes it possible to prevent shadows from appearing on the exterior of the cover member 30.

[0089] Furthermore, it is preferable that the connection portion P1 between the side plate portion 24 and the horizontal plate portion 23 is located closer to the ceiling (toward the second direction) than the connection portion between the attachment portion 33 and the extension portion 32 in the cover member 30. This makes it possible to prevent shadows from appearing on the appearance of the cover member 30. In this embodiment, the position of the opening edge 2a1 of the recess 2a in the fixture body 2 is approximately the same as the position of the connection portion between the attachment portion 33 and the extension portion 32 in the cover member 30.

[0090] In this way, the connection portion P1 between the side plate portion 24 and the horizontal plate portion 23 should be located in the area (area R in the enlarged view of Figure 3) between the position of the main plate portion 21, which is the bottom of the recess 20a, and the position of the opening edge 2a1 of the recess 2a of the device main body 2 or the position of the connection portion between the mounting portion 33 and the extension portion 32 in the cover member 30.

[0091] Furthermore, the length (extension amount) of the side plate portion 24 is longer than the depth of the recess 20a. That is, as shown in FIGS. 3 and 4 , if the depth of the recess 20a is a [mm] and the length of the side plate portion 24 is b [mm], it is preferable that the relationship b≧a is satisfied. In this case, the upper limit of the length b of the side plate portion 24 is not particularly limited, but it is preferable that the depth a of the recess 20a and the length b of the side plate portion 24 satisfy the relationship b≦2×a. That is, it is preferable that the ratio of the depth of the recess 20a to the length of the side plate portion 24 is 1:2 or less. Satisfying the relationship b≧a increases the strength of the frame 20, thereby improving the overall strength of the lighting device 3. This makes the lighting device 3 easier to handle during installation, etc. Furthermore, satisfying the relationship b≧a increases the length of the side plate portion 24. This allows the cover member 30 to be easily attached to the frame 20 by snap-in. Furthermore, by satisfying the relational expression b≧a, it is possible to reduce the thickness of the entire frame 20 in the Z-axis direction, thereby making it possible to reduce the thickness of the frame 20. Note that the relational expression b≧a does not have to be satisfied.

[0092] Furthermore, the connection portion P1 between the side plate portion 24 and the horizontal plate portion 23 may be located closer to the ceiling than the main plate portion 21. In this case, the length b of the side plate portion 24 is preferably longer than the depth a of the recess 20a (i.e., b > a), but the length b of the side plate portion 24 may be shorter than the depth a of the recess 20a. In this case, there is no particular lower limit to the length b of the side plate portion 24. The depth a of the recess 20a is preferably 3 mm or more.

[0093] As shown in FIGS. 3 and 4 , the tip portions of each of the pair of side plate portions 24 are provided with bent portions 24a formed to be bent. The bent portions 24a constitute the tip portions of the side plate portions 24. In the present embodiment, the bent portions 24a are folded back by folding back the tip portions of the side plate portions 24 in the thickness direction. Therefore, the bent portions 24a are composed of a folded back portion and a portion (a non-folded portion) facing the folded back portion. The bent portions 24a have a hemmed bend structure formed by, for example, hemming. Note that the bent portions 24a are not limited to those formed by hemming, but may also have a curled bend structure formed by curling and rolling up the tip portions of the side plate portions 24. Furthermore, while the bent portions 24a are formed by being bent inward in the width direction, this is not a limitation and the bent portions 24a may be formed by being bent outward in the width direction. Furthermore, the bent portions 24a may not necessarily be formed on the side plate portions 24.

[0094] Mounting portions 33 of the cover member 30 are attached to each of the pair of side plate portions 24. In the present embodiment, the cover member 30 is attached to the frame 20 by snapping in. Specifically, the cover member 30 can be fixed to the frame 20 by engaging abutting portions 33a provided on the mounting portions 33 of the cover member 30 with bent portions 24a of the side plate portions 24 from the width direction of the cover member 30. Therefore, the bent portions 24a are abutting portions that come into contact with the mounting portions 33.

[0095] The light source unit 10 supported by the frame 20 is covered with a cover member 30. The cover member 30 covers the LEDs 12 of the light source unit 10. In this embodiment, the cover member 30 covers all of the LEDs 12 in the light source unit 10. Furthermore, the cover member 30 covers not only the LEDs 12 but also the substrate 11 of the light source unit 10, and is disposed opposite the substrate 11 so as to cover the multiple LEDs 12. In other words, the cover member 30 covers the entire light source unit 10. In this way, the cover member 30 is attached to the frame 20 so as to cover the light source unit 10.

[0096] The cover member 30 is an example of a light-transmitting cover that transmits light emitted from the light source unit 10 (LEDs 12). In this embodiment, the cover member 30 is a diffusion cover that not only transmits light but also diffuses light. Therefore, the light from the LEDs 12 that enters the cover member 30 is diffused (scattered) by the cover member 30 and passes through the cover member 30.

[0097] 8, the cover member 30 further covers the frame 20 in which the light source unit 10 is arranged. In the present embodiment, the cover member 30 covers the entire frame 20 in which the light source unit 10 is arranged. Note that the cover member 30 is formed in an elongated shape in the Y-axis direction, similar to the light source unit 10 and the frame 20.

[0098] The cover member 30 is attached to the frame 20. The cover member 30 and the frame 20 form a cylindrical body, and the light source unit 10 is housed inside this cylindrical body.

[0099] As shown in Figures 3 and 8, the cover member 30 has a main portion 31 that covers the light source unit 10, an extension portion 32 that is an extension portion that extends toward the inside of the cover member 30, and an attachment portion 33 to which the frame 20 is attached.

[0100] 3, there is a gap GX between the cover member 30 and the inner surface of the recess 2a of the appliance body 2. In this embodiment, this gap GX is the gap between the attachment portion 33 of the cover member 30 and the inner wall surface of the recess 2a.

[0101] The main portion 31 is a main body portion of the cover member 30, and transmits light emitted from the LEDs 12 of the light source unit 10 to irradiate the light to the outside. The main portion 31 covers the light source unit 10. In other words, the main portion 31 faces the light source unit 10. Therefore, the main portion 31 has a surface facing the substrate 11 and the LEDs 12.

[0102] The main portion 31 constitutes the exterior of the cover member 30. As shown in FIG. 9, the main portion 31 is elongated in the Y-axis direction and formed in a gutter shape. The main portion 31 has, for example, a flat, approximately semi-cylindrical shape. Therefore, the main portion 31 has an elongated rectangular opening end face extending in the Y-axis direction. Furthermore, the cross-sectional shape of the main portion 31 when cut along the X-axis direction has a curved shape that is curved in a substantially arc shape. Note that the shape of the main portion 31 is not limited to a barrel-like R-shape, and may be an angular shape such as a U-shape, a rectangular shape with a partially constricted side, or a cylindrical shape.

[0103] In this embodiment, when the cover member 30 is viewed from the longitudinal direction of the lighting device 3, the outer shape of the cover member 30 is D-shaped as a whole. Specifically, when viewed from the longitudinal direction of the lighting device 3, the outer shape of the main portion 31 is D-shaped as a whole. As described above, the side shape of the lighting device 1, which is made up of the lighting device 3 and the fixture body 2, is also D-shaped as a whole, making the boundary between the lighting device 3 and the fixture body 2 less noticeable. Therefore, as shown in FIG. 3 , when viewed from the Y-axis direction, the outer surface of the main portion 31 of the cover member 30 and the outer surface (inclined surface) of the inclined surface portion 2b of the fixture body 2 are flush with each other. In other words, the outer surfaces of the main portion 31 and the inclined surface portion 2b are continuous, and there is no step, or even if there is a step, it is slight, at the boundary between the outer surface of the main portion 31 and the outer surface of the inclined surface portion 2b.

[0104] The main portion 31 has an outer end portion 31a located further outward in the short direction of the frame 20 than the protruding portion 20b of the frame 20. Specifically, the outer end portion 31a is a portion of the main portion 31 located further outward than the mounting portion 33. The outer end portion 31a of the main portion 31 faces an opening edge 2a1 of the recess 2a of the appliance body 2. The opening edge 2a1 of the recess 2a is a flat surface parallel to the XY plane.

[0105] The extension portion 32 extends toward the light source unit 10. In the present embodiment, the extension portion 32 is connected to the main portion 31 and extends from the main portion 31 toward the light source unit 10. Therefore, the extension portion 32 extends from the main portion 31 toward the inside of the cover member 30. Specifically, the extension portion 32 extends from the inner surface of the main portion 31 toward the light source unit 10. The extension portion 32 also extends toward the main plate portion 21 of the frame 20. In the present embodiment, the extension portion 32 extends from the main portion 31 toward the main plate portion 21. Note that the extension portion 32 extending toward the light source unit 10 or the main plate portion 21 means that a portion of the extension portion 32 extends toward the light source unit 10 or the main plate portion 21. The extension portion 32 is a plate-shaped piece with a constant thickness, and extends in the Y-axis direction as shown in FIGS. 8 and 9 .

[0106] A pair of extension portions 32 are provided. The pair of extension portions 32 are provided on either side of the light source unit 10 in the short-side direction of the frame 20. Specifically, the pair of extension portions 32 are provided at positions facing each other in the X-axis direction. In the present embodiment, the pair of extension portions 32 are formed symmetrically in the XZ cross section with respect to the center of the short-side direction of the cover member 30, but this is not limited to this.

[0107] Each extension portion 32 covers at least a portion of the protruding portion 20b of the frame 20. That is, each extension portion 32 covers at least a portion of the protruding portion 20b and faces the main plate portion 21. In this embodiment, each extension portion 32 covers the entire protruding portion 20b. Therefore, each extension portion 32 extends from the main portion 31 beyond the protruding portion 20b.

[0108] Furthermore, the extension portion 32 is formed in an arch shape so as to cover the protruding portion 20b. Therefore, the extension portion 32 is arch-shaped and convex toward the main portion 31. This allows the light emitted from the light source 10 to be reflected by the extension portion 32, thereby improving the light extraction efficiency. In addition, if a protruding portion 20b is formed on the frame 20, shadows tend to be cast on the outer end of the cover member 30, but by providing an arch-shaped extension portion 32 so as to cover the protruding portion 20b, shadows are less likely to be cast on the outer end of the cover member 30.

[0109] Each extension 32 has an outer extension 32a located outside the protruding portion 20b, and an inner extension 32b extending from the outer extension 32a toward the light source 10, covering at least a portion of the protruding portion 20b. In this embodiment, the inner extension 32b covers the entire protruding portion 20b. The outer extension 32a is located outside the horizontal plate portion 23 of the frame 20 in the short-side direction of the frame 20.

[0110] The outward-extending portion 32a is the part located outside the mounting portion 33, and the inward-extending portion 32b is the part located inside the mounting portion 33. In this case, as shown in Figure 3, the outward-extending portion 32a is a flat plate-shaped portion, and the inward-extending portion 32b is a portion formed to bend with the horizontal plate portion 23 of the frame 20 as the boundary. The inward-extending portion 32b is bent so as to cover the protruding portion 20b of the frame 20.

[0111] Further, each extension portion 32 extends from the inner surface of the main portion 31 toward the LED 12. Each extension portion 32 extends from a position on the inner surface of the main portion 31 closer to the ceiling (second direction) than the portion of the protruding portion 20b of the frame 20 that is located closest to the floor (first direction) toward the light source unit 10 so as to cover the protruding portion 20b. In this embodiment, the portion of the protruding portion 20b of the frame 20 that is located closest to the floor is the curved plate portion 23a of the horizontal plate portion 23. That is, each extension portion 32 extends from a position closer to the ceiling than the curved plate portion 23a of the protruding portion 20b toward the light source unit 10. Specifically, each extension portion 32 is connected to the tip of the outer end portion 31a of the main portion 31. Therefore, in each extension portion 32, the outer extension portion 32a is connected to the tip of the outer end portion 31a of the main portion 31, and the outer extension portion 32a extends from the outer end portion 31a of the main portion 31 toward the light source portion 10 side.

[0112] In this way, the extension portion 32 extends toward the light source unit 10 from a position closer to the ceiling than the portion of the horizontal plate portion 23 of the frame 20 closest to the floor, covering the protruding portion 20b of the frame 20. This allows a spatial region that extends toward the ceiling outside the protruding portion 20b of the frame 20 to be formed near the outer end 31a of the cover member 30. As a result, even if the frame 20 is provided with the protruding portion 20b that protrudes toward the floor, light emitted from the LEDs 12 that does not pass through the main portion 31 of the cover member 30 and is reflected by the inner surface of the main portion 31 can be guided around to the spatial region formed near the outer end 31a of the cover member 30. This allows the light emitted from the LEDs 12 to sufficiently reach the outer end 31a of the main portion 31 of the cover member 30, thereby allowing the light to be sufficiently illuminated up to the vicinity of the outer end 31a of the main portion 31 of the cover member 30. Therefore, the cover member 30 can be illuminated over the entire width direction (X-axis direction), and it is possible to prevent the width direction ends of the cover member 30 from becoming dark. In other words, it is possible to reduce the darkness of the width direction ends of the cover member 30 caused by the protrusions 20b of the frame 20.

[0113] Furthermore, by providing an extension 32 to the cover member 30, the luminous flux (upward luminous flux) of the illumination light emitted from the lighting device 3 toward the ceiling can be reduced. As a result, the luminous flux of the illumination light emitted from the lighting device 3 toward the floor can be increased, thereby improving the efficiency of light extraction toward the floor from the lighting device 3. In addition, by increasing the luminous flux toward the floor, the illuminance directly below the lighting fixture 1 can be improved. This makes it possible to reduce the number of lighting fixtures 1 to be installed when installing multiple lighting fixtures 1.

[0114] The outer extension portion 32a of the extension portion 32 has a portion that overlaps with the gap GX between the inner surface of the recess 2a and the mounting portion 33 in the direction toward the floor or the ceiling (i.e., in the Z-axis direction). Furthermore, the outer extension portion 32a faces the open end edge 2a1 of the recess 2a. In other words, in the Z-axis direction, the outer extension portion 32a overlaps with the open end edge 2a1. Therefore, the outer extension portion 32a is formed to straddle the gap GX.

[0115] The portion of each extension 32 facing the opening edge 2a1 of the extension 32a and the outer end 31a of the main part 31 form a projection that protrudes outward from the mounting part 33. Specifically, this projection is formed in a V-shape in the XZ cross section. The extension 32a does not protrude outward beyond the outer edge in the width direction of the opening surface of the recess 2a of the fixture body 2. Specifically, the extension 32a does not protrude outward in the Y-axis direction beyond the opening edge 2a1 of the recess 2a. Specifically, the connection portion (the apex of the V-shape) between the extension 32a and the outer end 31a of the main part 31 is on almost the same plane as the inclined surface 2b of the fixture body 2. As a result, the inclined surface 2b of the fixture body 2 and the surface of the main part 31 of the cover member 30 become a single continuous surface, improving the design of the lighting device 3.

[0116] The outer extension portion 32a of each extension portion 32 is a portion that connects the inner extension portion 32b and the main portion 31. Therefore, one end of the outer extension portion 32a is connected to the inner extension portion 32b, and the other end of the outer extension portion 32a is connected to the inner surface of the main portion 31.

[0117] The outer extension 32a is a contact portion that can abut against the opening edge 2a1 of the recess 2a of the fixture body 2. When the lighting device 3 is stored in the recess 2a of the fixture body 2, the outer extension 32a may or may not abut against the opening edge 2a1. That is, a gap may exist between the outer extension 32a and the opening edge 2a1, or the outer extension 32a and the opening edge 2a1 may be in contact. More specifically, in this embodiment, as shown in the enlarged view of FIG. 3 , the outer extension 32a has a protrusion 34c that protrudes toward the opening edge 2a1, and the protrusion 34c is designed to abut against the opening edge 2a1. This prevents surface contact between the outer extension 32a and the opening edge 2a1 and noise generation. Furthermore, foreign objects such as insects are prevented from entering the recess 2a of the appliance body 2 through the gap between the outer extension 32a and the opening edge 2a1. In this embodiment, the protrusion 34c is a protruding rib extending in the longitudinal direction (Y-axis direction) of the opening edge 2a1. However, multiple protrusions 34c may be arranged along the longitudinal direction. In other words, each of the multiple protrusions 34c may be recognized as a dot-like portion rather than a protruding rib. This may also be applied to the protrusions 34a and 34b described below.

[0118] In this embodiment, when the lighting device 3 is attached to the fixture body 2 by being pulled up by the elastic holding member 6 (kick spring), the outer extension portion 32a abuts against the opening edge 2a1 of the fixture body 2, thereby attaching the lighting device 3 to the fixture body 2. For this reason, it is desirable that the outer extension portion 32a abuts against the protrusion 34c of the opening edge 2a1. However, a gap may occur between the protrusion 34c of the outer extension portion 32a and the opening edge 2a1 due to warping, twisting, or groaning of various components such as the frame 20 or the cover member 30, or variations during installation of the lighting fixture 1 (distortion due to bolt tightening, variations due to wiring, etc.).

[0119] The outer extension portion 32a may be a part of the main portion 31. In this case, the extension portion 32 is composed of only the inner extension portion 32b.

[0120] At least a portion of the extension portion 32 has a shape that follows a portion of the frame 20. In this embodiment, at least a portion of the extension portion 32 has a shape that follows the protruding portion 20b of the frame 20. Specifically, as described above, the inner extension portion 32b of the extension portion 32 has a shape that follows the protruding portion 20b of the frame 20. Specifically, the inner extension portion 32b has a shape that follows the inclined plate portion 23b of the protruding portion 20b of the frame 20.

[0121] As shown in Fig. 3, the inner extension portion 32b is bent so as to protrude toward the floor. That is, the inner extension portion 32b is formed to have a protruding portion that protrudes toward the floor, similar to the protruding portion 20b of the frame 20. The protruding portion 20b of the frame 20 protrudes toward the bent portion (protruding portion) of this inner extension portion 32b. Therefore, the protruding portion 20b of the frame 20 is formed to fit into the protruding portion of the inner extension portion 32b.

[0122] Furthermore, at least a portion of the inner extension portion 32b can abut against the frame 20. As will be described later, in this embodiment, the tip of the inner extension portion 32b abuts against the main plate portion 21 of the frame 20. Note that the cover member 30 basically contacts the frame 20 only at two points, the tip of the inner extension portion 32b and the tip (abutment portion 33a) of the mounting portion 33, and therefore a gap exists between the inner extension portion 32b and the protruding portion 20b of the frame 20. However, depending on variations in parts or installation, there may be cases where the inner extension portion 32b and a portion of the protruding portion 20b come into contact. Note that the inner extension portion 32b and the protruding portion 20b may be intentionally brought into contact with each other.

[0123] The tip of each extension portion 32 on the light source unit 10 side is located closer to the center of the frame 20 than the protrusion 20b of the frame 20. Specifically, the tip of the inner extension portion 32b of the extension portion 32 is located to the side of the protrusion 20b.

[0124] The inner extension portion 32b has a first plate portion 32b1 that faces the protrusion portion 20b of the frame 20, a second plate portion 32b2 that extends from a position beyond the protrusion portion 20b toward the light source portion 10, and a third plate portion 32b3 that stands upright from the second plate portion 32b2 toward the ceiling side.

[0125] The first plate portion 32b1 faces the horizontal plate portion 23 that constitutes the protruding portion 20b, and, like the horizontal plate portion 23, is composed of an inclined plate portion and a curved plate portion.

[0126] The second plate portion 32b2 is an inclined plate portion that extends from a position beyond the protruding portion 20b (horizontal plate portion 23) so as to be inclined toward the main plate portion 21 of the frame 20. Note that the second plate portion 32b2 does not have to be inclined. For example, the second plate portion 32b2 may be parallel to the main plate portion 21 of the frame 20.

[0127] The third plate portion 32b3 is an upright plate portion that stands from the tip of the second plate portion 32b2 toward the ceiling. In other words, the third plate portion 32b3 stands on the main plate portion 21 of the frame 20. Specifically, the third plate portion 32b3 is a vertical portion that is formed perpendicular to the main plate portion 21 of the frame 20. The third plate portion 32b3 is the tip of the inner extension portion 32b. In other words, the tip of the third plate portion 32b3 is the tip of the extension portion 32 on the light source unit 10 side. The height (length) of the third plate portion 32b3 is shorter than the height of the protrusion 20b formed on the main plate portion 21 of the frame 20 (in this embodiment, the position of the horizontal plate portion 23).

[0128] The inclination of the inner portion of the inner extension portion 32b in the short-side direction of the cover member 30 is gentler than the inclination of the cover member 30 in the short-side direction. In other words, the inclination of the portion on the light source unit 10 side is gentler than the inclination of the portion on the mounting unit 33 side. Specifically, the inclination of the second plate portion 32b2 (inclined plate portion) of the inner extension portion 32b is gentler than the inclination of the inclined plate portion of the first plate portion 32b1 of the inner extension portion 32b. In other words, the inclination angle of the second plate portion 32b2 (inclined plate portion) of the inner extension portion 32b is smaller than the inclination angle of the inclined plate portion of the first plate portion 32b1 of the inner extension portion 32b.

[0129] The extension portion 32 has a contact portion that contacts the frame 20 when pressed against it. In the present embodiment, this contact portion is provided on the inner extension portion 32b. Specifically, the contact portion is the third plate portion 32b3 of the inner extension portion 32b. That is, the third plate portion 32b3, which is the contact portion, contacts the main plate portion 21 of the frame 20. The third plate portion 32b3 (contact portion) is pressed against the frame 20. The extension portion 32 pressed against the frame 20 is elastically deformed. That is, when the extension portion 32 elastically deforms, the third plate portion 32b3 (contact portion) is pressed against the frame 20 by the reaction force.

[0130] The tip of each extension portion 32 on the light source unit 10 side is located closer to the center of the frame 20 than the protrusion 20b of the frame 20. Specifically, the tip of the third plate portion 32b3 of the inner extension portion 32b of each extension portion 32 is located closer to the center of the frame 20 than the inner end of the horizontal plate portion 23 of the frame 20.

[0131] The third plate portion 32b3 of the inner extending portion 32b is formed so that its tip extends toward the substrate 11. In the present embodiment, the third plate portion 32b3 is formed so that it slopes toward the substrate 11.

[0132] The extension portion 32 has an abutment portion 32c that abuts against the main plate portion 21 of the frame 20. The abutment portion 32c of the extension portion 32 abuts against the main plate portion 21 of the frame 20 in a pressed state. In this embodiment, the abutment portion 32c is the tip end of the extension portion 32. Therefore, the tip end of the extension portion 32 abuts against the main plate portion 21 of the frame 20 in a pressed state. Specifically, the abutment portion 32c is the tip end of the inner extension portion 32b. In other words, the abutment portion 32c is the third plate portion 32b3 of the inner extension portion 32b. In this case, the end face of the tip end of the third plate portion 32b3, which is the abutment portion 32c, abuts against the main plate portion 21 of the frame 20 in a pressed state.

[0133] The extension portion 32 pressed against the frame 20 is elastically deformed. In other words, the extension portion 32 is elastically deformed, and the reaction force presses the abutment portion 32c (third plate portion 32b3) against the main plate portion 21 of the frame 20. Therefore, the attitude of the extension portion 32 relative to the frame 20 is different before and after the cover member 30 is attached to the frame 20.

[0134] Each extension portion 32 is preferably disposed outside the directional characteristics (light distribution angle) of the LED 12. For example, since the light distribution angle (half beam angle) of the LED 12 is 120°, the opening angle (tilt angle of the second plate portion 32b2) of the pair of extension portions 32 is preferably 120° or more. This reduces the loss of light emitted from the LED 12 in the cover member 30, and most of the light emitted from the LED 12 passes through the cover member 30 and is emitted to the outside. In other words, the light extraction efficiency of the cover member 30 can be improved. The opening angle of the pair of second plate portions 32b2 is preferably 160° or more. Note that the upper limit of the opening angle of the pair of second plate portions 32b2 is, for example, 170°. Note that the light extraction efficiency can be further improved by forming the extension portion 32 in white (highly reflective and opaque) by two-color molding.

[0135] A spatial region S1 exists between each extension portion 32 and the frame 20. Specifically, the spatial region S1 exists between the inner extension portion 32b of each extension portion 32 and the main plate portion 21 of the frame 20. The spatial region S1 may accommodate the screw foot or screw head when various components are screwed together, or the crimped portion when the frame 20 is crimped to another metal component. In this embodiment, as shown in FIG. 4 , the spatial region S1 accommodates the head of a fastening member 50 for fastening the power supply unit 400 to the frame 20. This prevents, for example, a shadow formed by the head of the fastening member 50 blocking light emitted from the light source unit 10 from being visible from outside the cover member 30. In this embodiment, the fastening member 50 is a screw having a head and a screw shaft. The tip of the screw shaft of the fastening member 50 is preferably chamfered, such as rounded. This prevents wiring arranged in the second direction (ceiling side) of the main plate portion 21 of the frame 20 from being damaged by the tip of the screw shaft. In this embodiment, the heads of the fastening members 50 used to fasten the functional unit 600 to the frame 20 are also arranged in the spatial region S1. The fastening members 50 that fasten the power supply unit 400 and / or the functional unit 600 to the frame 20 may be rivets. The fastening members 50 that are screws in this embodiment will be described later with reference to FIG. 15.

[0136] In this embodiment, two fastening members 50 are used to secure the power supply unit 400 to the frame 20, and two fastening members 50 are used to secure the functional unit 600 to the frame 20. All four fastening members 50 are inserted into the through holes in the frame 20 from one side in the thickness direction (Z-axis direction) of the frame 20 (in this embodiment, the positive Z-axis direction). In other words, the heads of the four fastening members 50 face in the same direction. This allows the fastening members 50 to be tightened efficiently.

[0137] 7, the functional unit 600 has a functional member 610 and a second holding member 650 that holds the functional member 610. In the present embodiment, the functional member 610 is a dimming terminal block that outputs a signal input from a signal line 62 (see FIG. 33 described later) that passes through the wiring insertion hole 2e2 to the power supply unit 400.

[0138] In this embodiment, the functional unit 600 is arranged biased toward the short side direction of the lighting device 3 (the short side direction of the frame 20). Specifically, as shown in Fig. 7, the functional unit 600 is arranged toward the positive direction of the X axis on the frame 20. As a result, a spatial region S4 is formed in the negative direction of the X axis of the functional unit 600, through which a VVF cable or the like can pass in the Y axis direction.

[0139] The functional member 610 according to this embodiment has a signal input unit 611 to which the dimming signal line is connected, and a second signal connector 625 (described later using FIG. 27, etc.) to which one end of a cable 65 is connected. The other end of the cable 65 is connected to a first signal connector 425 (described later using FIG. 12, etc.) provided in the power supply unit 400. This electrically connects the functional unit 600 and the power supply unit 400 via the cable 65. The cable 65 is a wiring member including two or more electric wires and a protective tube that covers the two or more electric wires. Details of the cable 65 will be described later using FIG. 26, etc.

[0140] The type of the functional unit 600 (more specifically, the functional component 610) is not particularly limited. The functional unit 600 may be a sensor unit equipped with various sensors such as a motion sensor or a brightness sensor, a wireless module having an antenna and a control circuit for receiving wireless signals, an infrared module having a light receiving element and a control circuit for receiving infrared signals, or a pull switch. The wireless signal or infrared signal may be, for example, a remote control signal for turning the LED 12 on and off or adjusting the brightness and color of the LED 12, or a setting signal for performing various settings of the lighting device 3.

[0141] The spatial region S1 (see FIG. 4) may house functional components or may house internal electric wires that are wired in the factory when the lighting device 3 is manufactured.

[0142] A functional component that can be accommodated in the spatial region S1 is, for example, a function expansion module. Similar to the functional unit 600, examples of the function expansion module include a sensor unit, a wireless module, an infrared module, a pull switch, or a second light source separate from the LED 12 (first light source) mounted on the substrate 11. The second light source may be a light source for monitor display (monitor lamp), a light source for controlling the light distribution of the illumination light emitted from the cover member 30 (e.g., a light source for wide light distribution), a color light source for effecting (e.g., red, blue, and green LED light sources), or an emergency light source that turns on in an emergency. When an emergency light source is used as the second light source, the cover and / or the cover member 30 that covers the second light source may be made of a flame-retardant material such as glass. Note that the term "wireless" is not limited to a specific frequency band and may refer to wireless in a broad sense, including radio waves and light (including infrared rays). The antenna in the wireless module may be, for example, a pattern antenna, a chip antenna, a rod antenna, or a plate antenna, but is not limited thereto. The wireless module may have an antenna region and a control region. The connection between the wireless module and the power supply unit 400 may be by connectors on both ends of an electric wire, or only one of the wireless module and the power supply unit 400 may have a connector. The connection between the wireless module and the power supply unit 400 may be by wireless connection via wireless communication instead of by wired connection via an electric wire.

[0143] The internal electric wires stored in the spatial region S1 are, for example, electric wires connected to the power supply unit 400. Among these, the electric wires connected to the power supply unit 400 include a power supply line connecting the power supply unit 400 and the light source unit 10, a power line connecting the power supply unit 400 and the power terminal block 8, a dimming control line connecting the power supply unit 400 and the function unit 600, and a control line connected to the above-mentioned function expansion module (sensor, etc.).

[0144] The mounting portion 33 of the cover member 30 extends on the side opposite to the light emission side of the light source unit 10. Specifically, the mounting portion 33 is connected to the extension portion 32 and extends from a part of the extension portion 32 toward the ceiling. The mounting portion 33 is attached to a pair of side plate portions 24 of the frame 20.

[0145] Even if a foreign object such as an insect enters the spatial region S1, the distance between the spatial region S1 and the main portion 31 is long, so a shadow is unlikely to be cast by the foreign object present in the spatial region S1. The gap region between the inclined plate portion 23b of the frame 20 and the inner extension portion 32b is close to the main portion 31, so if an insect is present in this gap region, it is likely to cast a shadow. However, the gap region is small, so insects are unlikely to accumulate there. Even if an insect enters this gap region, because the insect has propulsion capabilities, the insect will move from this gap region toward the spatial region S1, i.e., the insect will enter the spatial region S1 where a shadow is unlikely to be cast. Furthermore, because the entrance (exit) of the spatial region S1 is narrow, once the insect enters the spatial region S1, it will not exit the spatial region S1. In other words, the insect can be trapped in the spatial region S1 where a shadow is unlikely to be cast. This does not apply if the extension portion 32 is made of an opaque material such as white resin.

[0146] In this embodiment, a pair of mounting portions 33 are provided to sandwich the frame 20. The pair of mounting portions 33 are formed as a pair of legs (feet) of the cover member 30. The pair of mounting portions 33 have the same length in the Z-axis direction. As shown in FIGS. 8 and 9, each of the pair of mounting portions 33 is formed elongated along the Y-axis direction. The pair of mounting portions 33 also have the same length in the Y-axis direction.

[0147] When the cover member 30 is attached to the frame 20, each of the pair of attachment portions 33 is elastically deformed. The posture of each attachment portion 33 relative to each side plate portion 24 is different before and after the cover member 30 is attached to the frame 20.

[0148] As shown in Figures 3 and 8, each of the pair of mounting portions 33 has a contact portion 33a that abuts against the pair of side plate portions 24 of the frame 20. In other words, the mounting portion 33 is in contact with the side plate portion 24 of the frame 20 at the contact portion 33a. In this embodiment, the contact portion 33a of the mounting portion 33 is the tip of the mounting portion 33. Therefore, the tip of the mounting portion 33 is in contact with the side plate portion 24 of the frame 20. Also in this embodiment, the contact portion 33a of the mounting portion 33 is an engaging portion that engages with the tip of the side plate portion 24 of the frame 20. Therefore, the tip of the mounting portion 33 is engaged with the tip of the side plate portion 24 of the frame 20.

[0149] In this embodiment, the contact portion 33a, which is the engaging portion, is, for example, a bent portion formed by bending the tip of the mounting portion 33 into an L-shape. The bent portion 24a provided at the tip of the side plate portion 24 of the frame 20 engages with this contact portion 33a, thereby locking and fixing the pair of mounting portions 33 of the cover member 30 and the pair of side plate portions 24 of the frame 20 together. As a result, the pair of mounting portions 33 of the cover member 30 are fixed to the frame 20 by embracing the frame 20.

[0150] Alternatively, the side plate portion 24 of the frame 20 and the mounting portion 33 of the cover member 30 may be fixed together with screws. In this case, the screws are screwed into the overlapping portion of the side plate portion 24 and the mounting portion 33 from the outside of the mounting portion 33. Alternatively, the frame 20 and the cover member 30 may be fixed together by a crimping structure. For example, the frame 20 and the cover member 30 may be fixed together by crimping a part of the side plate portion 24 of the frame 20 and fixing it to the mounting portion 33 of the cover member 30. Alternatively, the frame 20 and the cover member 30 may be fixed together with separate parts such as metal fittings.

[0151] In the present embodiment, as described above, the cover member 30 is attached to the frame 20 by snapping the attachment portions 33 of the cover member 30 into the side plate portions 24 of the frame 20 from the width direction of the cover member 30, but this is not limiting. For example, the cover member 30 may be attached to the frame 20 by inserting the cover member 30 from the end of the frame 20 in the longitudinal direction and sliding the cover member 30.

[0152] In the present embodiment, the abutting portion 33a formed at the tip of the attachment portion 33 has a shape that is bent at an angle, but this is not limiting. The abutting portion 33a may also be formed so that the tip is folded back. In this case, the abutting portion 33a has a recessed portion with a cross-sectional shape that is approximately U-shaped or C-shaped.

[0153] A first gap G1, which is a space, exists between the extension portion 32 of the cover member 30 and the frame 20. Specifically, the first gap G1 exists between the extension portion 32 and the protrusion 20b of the frame 20.

[0154] The first gap G1 includes the gap between the top of the protruding portion 20b and the extension portion 32. In this embodiment, the top of the protruding portion 20b is the curved plate portion 23a of the horizontal plate portion 23, and the protruding portion 20b is covered by the inner extension portion 32b of the extension portion 32. Therefore, the first gap G1 exists between the inner extension portion 32b of the extension portion 32 and the curved plate portion 23a of the horizontal plate portion 23 of the frame 20.

[0155] The first gap G1 also includes a gap between a portion of the protrusion 20b other than the apex and the extension portion 32. Specifically, the first gap G1 exists not only between the inner extension portion 32b of the extension portion 32 and the curved plate portion 23a of the horizontal plate portion 23, but also between the inner extension portion 32b of the extension portion 32 and the inclined plate portion 23b of the horizontal plate portion 23.

[0156] In this embodiment, the first gap G1 exists over the entire area between the inner extension portion 32b of the extension portion 32 and the protrusion 20b. Therefore, the extension portion 32 and the protrusion 20b are not in contact with each other. Specifically, even when the lighting device 3 is stored in the recess 2a of the fixture body 2, the extension portion 32 and the protrusion 20b are not in contact with each other.

[0157] As shown in the enlarged view of FIG. 3, the extension portion 32 of the cover member 30 is provided with a protrusion 34a located in the first gap G1. The protrusion 34a is provided on the inner extension portion 32b of the extension portion 32. Specifically, the protrusion 34a is provided on the first plate portion 32b1 of the inner extension portion 32b. The protrusion 34a located in the first gap G1 is located between the extension portion 32 and the inclined plate portion 23b of the horizontal plate portion 23 of the frame 20.

[0158] The protrusion 34a is a convex portion that protrudes from the extension portion 32 toward the protruding portion 20b. Specifically, the protrusion 34a protrudes toward the inclined plate portion 23b of the horizontal plate portion 23 of the protruding portion 20b and faces the inclined plate portion 23b. In this case, the protrusion 34a is provided so that the tip of the protrusion 34a does not contact the frame 20 when the frame 20 and the cover member 30 are in a predetermined reference position (design position). Therefore, a first gap G1 exists between the tip of the protrusion 34a and the protruding portion 20b. Specifically, the first gap G1 exists between the tip of the protrusion 34a and the inclined plate portion 23b. Note that, because the tip of the protrusion 34a is provided so as not to contact the frame 20, the width of the first gap G1 (the distance between the extension portion 32 and the protruding portion 20b) in the portion where the protrusion 34a is not provided is longer than the height of the protrusion 34a.

[0159] The protrusions 34a are formed integrally with the extension portion 32. In this embodiment, the protrusions 34a are ribs extending in the Y-axis direction. In this case, the protrusions 34a extending in the Y-axis direction may be provided over the entire longitudinal length of the cover member 30, or one or more protrusions 34a may be provided along a portion of the entire longitudinal length of the cover member 30. As an example, the cross-sectional shape of the protrusions 34a is triangular, but this is not limited thereto. For example, the cross-sectional shape of the protrusions 34a may be semicircular, etc. Furthermore, while the protrusions 34a are ribs extending in the Y-axis direction, this is not limited thereto. For example, the protrusions 34a may be dots in the shape of a triangular pyramid or a hemisphere. In this case, multiple dot protrusions 34a may be provided discretely along the Y-axis direction. Furthermore, the height of the protrusions 34a is smaller than the thickness of the extension portion 32, but this is not limited thereto.

[0160] Furthermore, a second gap G2, which is a space, exists between the mounting portion 33 of the cover member 30 and the side plate portion 24 of the frame 20. The second gap G2 exists over the entire area in the Y-axis direction between the inner surface of the mounting portion 33 and the outer surface of the side plate portion 24. However, the inner surface of the mounting portion 33 and the outer surface of the side plate portion 24 are not in surface contact. Specifically, as shown in the enlarged view of FIG. 3 , the mounting portion 33 of the cover member 30 includes a protrusion 34b that protrudes toward the side plate portion 24 of the frame 20. In this embodiment, one or more protrusions 34b of the mounting portion 33 abut against the side plate portion 24. This prevents surface contact between the mounting portion 33 and the side plate portion 24 and the generation of abnormal noise. Furthermore, foreign matter such as insects is prevented from entering the first gap G1 through the second gap G2. Furthermore, displacement (rattle) of the cover member 30 in the short-side direction (X-axis direction) of the frame 20 is suppressed. In this embodiment, the protrusion 34b is a protruding rib extending in the longitudinal direction (Y-axis direction) of the mounting portion 33. However, a plurality of protrusions 34b may be arranged along the longitudinal direction. In this embodiment, two protrusions 34b are arranged in the Z-axis direction in the cross section shown in Fig. 3, but the number of protrusions 34b arranged in the Z-axis direction may be one, or three or more.

[0161] The width of the first gap G1 and the width of the second gap G2 may be the same or different. Furthermore, the width of the first gap G1 and the width of the second gap G2 are larger than the thickness of the extension portion 32 and the thickness of the metal plate that constitutes the frame 20, but are not limited to this.

[0162] The cover member 30 is made of a translucent material such as a translucent resin material such as acrylic or polycarbonate, or a translucent material such as a glass material. In this embodiment, the cover member 30 is made of a translucent resin material. In this case, the cover member 30 can be a milky white cover member with a light diffusing material dispersed therein. Such a cover member 30 can be produced by resin molding a translucent resin material mixed with a light diffusing material into a predetermined shape. Light-reflecting fine particles such as silica particles can be used as the light diffusing material.

[0163] The cover member 30 may be configured by forming a milky white light-diffusing film containing a light-diffusing material on the surface (inner or outer surface) of the transparent cover, rather than dispersing a light-diffusing material inside. The cover member 30 may also be configured to have light-diffusing properties by applying a diffusing treatment, rather than using a light-diffusing material. For example, the cover member 30 may be configured to have light-diffusing properties by applying a surface treatment such as a texturing treatment to form minute irregularities on the surface of the transparent cover, or by printing a dot pattern on the surface of the transparent cover. Even when the cover member 30 is subjected to a diffusing treatment, it may further contain a light-diffusing material to enhance light-diffusing properties.

[0164] In this embodiment, the main portion 31, the extension portion 32, and the mounting portion 33 that constitute the cover member 30 are integrally formed. Therefore, the main portion 31, the extension portion 32, and the mounting portion 33 are made of the same material. Note that the main portion 31, the extension portion 32, and the mounting portion 33 all have the same material strength, but this is not limited to this. For example, the material strengths of the main portion 31, the extension portion 32, and the mounting portion 33 may be different. In this case, it is preferable that the material strength of the main portion 31 is greater than the material strength of the extension portion 32 and the material strength of the mounting portion 33. This configuration can prevent deformation of the main portion 31. In other words, the shape of the main portion 31 is stabilized. This can reduce the impact of deformation of the cover member 30 on optical performance.

[0165] Furthermore, the thicknesses of the main portion 31, the extension portion 32, and the mounting portion 33 are not particularly limited, but are, for example, 0.5 mm or more and 5 mm or less. As an example, the thickness of the main portion 31 may be 1 mm or less. Note that the main portion 31, the extension portion 32, and the mounting portion 33 all have the same thickness, but this is not limited to this. For example, the thicknesses of the main portion 31, the extension portion 32, and the mounting portion 33 may be different. In this case, it is preferable that the thickness of the main portion 31 is greater than the thicknesses of the extension portion 32 and the mounting portion 33. This configuration can suppress deformation of the main portion 31. In other words, the shape of the main portion 31 is stabilized. This can reduce the impact of deformation of the cover member 30 on optical performance.

[0166] In the present embodiment, the main portion 31, the extension portion 32, and the mounting portion 33 are made of the same resin material. However, this is not limiting. The main portion 31, the extension portion 32, and the mounting portion 33 may be made of two or more types of materials. In this case, the main portion 31 and the extension portion 32 may be made of different resin materials. For example, the main portion 31 may be made of a translucent resin material, and part or all of the extension portion 32 may be made of a white or milky white resin material. The mounting portion 33 may be made of the same resin material as the main portion 31 or the extension portion 32. Specifically, the main portion 31, the mounting portion 33, the outer extension portion 32a of the extension portion 32, and the second plate portion 32b2 of the inner extension portion 32b of the extension portion 32 may be made of a translucent resin material, and the first plate portion 32b1 and the third plate portion 32b3 of the inner extension portion 32b of the extension portion 32 may be made of a white or milky white resin material. By coloring part or all of the extension portion 32 white or milky white, the extension portion 32 (e.g., the inner extension portion 32b) can be given a reflective function. This allows light emitted from the LEDs 12 that reaches the extension portion 32 to be reflected by the inner extension portion 32b and enter the main portion 31. As a result, the light extraction efficiency of the lighting device 3 can be improved. Therefore, the illuminance directly below the lighting fixture 1 can be improved, and when multiple lighting fixtures 1 are installed, the number of lighting fixtures 1 installed can be reduced. Furthermore, by coloring the mounting portion 33 white or milky white, light leakage into the fixture body 2 can be reduced. The cover member 30 thus partially composed of a white or milky white resin material can be formed by two-color molding. The extension portion 32 may also be molded using two layers and two colors. For example, the base layer of the extension portion 32 may be made of the same translucent resin material as the main portion 31, and the surface layer of the extension portion 32 (a layer laminated on the base layer) may be made of a white or milky white resin material.

[0167] The cover member 30 has both longitudinal ends closed. In the present embodiment, both longitudinal ends of the cover member 30 are closed by end caps 40. Specifically, a long cylindrical body is formed by fixing the cover member 30 and the frame 20, and end caps 40 are attached to both longitudinal ends of the cylindrical body. A spatial region S2 is formed between the cover member 30 and the frame 20. This spatial region S2 is an area (insect-proof area) configured to prevent the intrusion of foreign objects such as insects and dust, and is an area surrounded by the main portion 31 of the cover member 30 and the main plate portion 21 of the frame 20. Specifically, the spatial region S2 is an area enclosed by the main portion 31 and extension portion 32 of the cover member 30, the main plate portion 21 of the frame 20, and the end caps 40. The light source unit 10 is disposed in this spatial region S2.

[0168] The end cap 40 is a component for preventing foreign matter such as dust and insects from entering the interior of the cylindrical body formed by the cover member 30 and the frame 20. The end cap 40 is provided to close the open end of the cylindrical body formed by the frame 20 and the cover member 30. That is, the end cap 40 is attached to the cylindrical body so as to cover the open end of the cylindrical body formed by the frame 20 and the cover member 30, thereby closing the open end of the cylindrical body. This prevents foreign matter such as dust and insects from entering the interior of the cylindrical body formed by the frame 20 and the cover member 30. That is, it prevents foreign matter such as dust and insects from entering the spatial region S2. The frame 20 has through holes formed by cutting and raising the first claw pieces 21a, etc., and multiple through holes such as the light source through hole 120. Each of these multiple through holes is blocked by a film member 29, which is, for example, a single-sided adhesive sheet. This prevents foreign matter such as dust and insects from entering the spatial region S2 through these multiple through holes.

[0169] The end caps 40 are cover ends provided at the longitudinal ends of the cover member 30. The end caps 40 are provided at both longitudinal ends of the cover member 30. The end caps 40 are connected directly or indirectly to the longitudinal ends of the cover member 30.

[0170] As shown in FIG. 9, the end cap 40 provided at one longitudinal end of the cover member 30 is a first end cap 40a, and the end cap 40 provided at the other longitudinal end of the cover member 30 is a second end cap 40b. In this embodiment, the first end cap 40a and the second end cap 40b are the same component. That is, the shape of the second end cap 40b is the same as the shape of the first end cap 40a. This allows for cost reduction. The first end cap 40a and the second end cap 40b are arranged in opposite directions in the longitudinal direction (Y-axis direction) of the cover member 30.

[0171] As shown in FIG. 5, the end cap 40 has a plate-shaped main portion 41, a connecting portion 42 that is connected directly or indirectly to the cover member 30, and a protruding piece 43 that protrudes from the main portion 41.

[0172] The main portion 41 constitutes the main body of the end cap 40, and mainly functions to cover the open end of the cylindrical body formed by the cover member 30 and the frame 20. In this embodiment, all or a part of the plate-shaped main portion 41 is translucent. As such, the main portion 41 having translucency allows light from the light source unit 10 to pass through. In other words, light emitted from the LEDs 12 of the light source unit 10 passes through the main portion 41 and is extracted to the outside of the end cap 40.

[0173] Specifically, the entire end cap 40 is translucent. Therefore, the entire main portion 41 and the entire connecting portion 42 are translucent. The translucent end cap 40 may be transparent or may have diffusive properties. By using an end cap 40 that is translucent and diffusive, the light from the LEDs 12 that enters the end cap 40 is diffused (scattered) by the end cap 40 and passes through the end cap 40.

[0174] The end cap 40 is made of a translucent material such as a translucent resin material, such as acrylic or polycarbonate, or a glass material. In this embodiment, the end cap 40 is made of a translucent resin material. In this case, the end cap 40 can be a diffusing member having a light diffusing material dispersed therein. Such an end cap 40 can be produced by resin molding a translucent resin material mixed with a light diffusing material into a predetermined shape. Light-reflecting fine particles, such as silica particles, can be used as the light diffusing material.

[0175] The translucent and diffusive end cap 40 may be constructed by forming a milky white light-diffusing film containing a light-diffusing material on the surface (inner or outer surface) of a transparent end cap, rather than dispersing a light-diffusing material inside. The end cap 40 may also be configured to have light-diffusive properties by diffusing the material rather than using a light-diffusing material. For example, the end cap 40 may be configured to have light-diffusive properties by applying a surface treatment such as a graining process to form minute irregularities on the surface of the transparent end cap, or by printing a dot pattern on the surface of the transparent end cap. Even when the end cap 40 is subjected to a diffusive process, it may further contain a light-diffusive material to enhance light-diffusive properties.

[0176] The end cap 40 may be made of the same material as the cover member 30 or may be made of a different material from the cover member 30.

[0177] Furthermore, the main portion 41 does not have to be light-transmitting. In this case, the entire end cap 40 does not have to be light-transmitting. For example, an example of a light-opaque end cap 40 is one that has light-blocking (light-absorbing) or light-reflecting properties. In this case, the end cap 40 is made of, for example, a white, black, or colored resin material. Furthermore, the end cap 40 may have a light-transmitting portion and a light-opaque portion.

[0178] The shape of the main portion 41 in a front view is, for example, a flattened semi-cylindrical shape overall. Therefore, the outer shape of one side of the main portion 41 in the Z-axis direction is curved in an arc shape so as to match the shape of the cover member 30. The thickness of the plate-shaped main portion 41 is constant. As an example, the thickness of the main portion 41 is 1 mm to 5 mm, but is not limited to this. Note that the thickness of the main portion 41 is constant over the entire area of ​​the main portion 41, but is not limited to this.

[0179] In this embodiment, the end cap 40 has a D-shape as a whole when viewed from the longitudinal direction of the lighting device 3. Specifically, the main portion 41 also has a D-shape as a whole when viewed from the longitudinal direction of the lighting device 3. As described above, the side surface of the lighting device 1, which is made up of the lighting device 3 and the fixture body 2, also has a D-shape as a whole, making the boundary between the lighting device 3 and the fixture body 2 less noticeable. Therefore, when viewed from the Y-axis direction, the outer surface of the main portion 41 of the end cap 40 and the outer surface (inclined surface) of the inclined surface portion 2b of the fixture body 2 are flush with each other. In other words, the outer surface of the main portion 41 and the outer surface of the inclined surface portion 2b are continuous, and there is no step, or even if there is a slight step, at the boundary between the outer surface of the main portion 41 and the outer surface of the inclined surface portion 2b. Note that in the Y-axis direction, the outer surface of the main portion 41 of the end cap 40 and the outer surface of the main portion 31 of the cover member 30 are also continuous and flush with each other.

[0180] The main portion 41 has an outer surface 41a and an inner surface 41b as surfaces in the thickness direction of the main portion 41. In the end cap 40, the inner surface 41b is the end on the LED 12 side, and the outer surface 41a is the surface on the opposite side from the LED 12. As described above, in this embodiment, the entire main portion 41 is translucent, so the light emitted from the LED 12 and incident on the main portion 41 passes through the entire main portion 41. Therefore, the inner surface 41b of the main portion 41 becomes the light incident surface on which the light from the LED 12 is incident, and the outer surface 41a of the main portion 41 becomes the light emission surface on which the light from the LED 12 is emitted to the outside.

[0181] The main portion 41 is curved in a concave shape as a whole, so as to be recessed inward. For example, the outer surface 41a and inner surface 41b of the main portion 41 are parabolic in shape. In this embodiment, the main portion 41 is generally inclined such that in the height direction (Z-axis direction), the upper portion (ceiling side) is recessed inward from the lower portion (floor side), and in the width direction (X-axis direction), the central portion is recessed inward from the surrounding portion, thus having a generally curved shape.

[0182] Furthermore, the main portion 41 does not have to be curved inward (i.e., convex inward). For example, the main portion 41 may be curved outward. Also, the main portion 41 does not have to be curved. For example, the main portion 41 may be an inclined plate, or a non-inclined vertical plate parallel to the Z-axis direction.

[0183] The connecting portion 42 is formed at the floor-side end of the main portion 41. The connecting portion 42 is formed to stand upright on the inner surface 41b of the main portion 41. The connecting portion 42 is formed on the curved portion of the outer circumference of the main portion 41. In other words, the connecting portion 42 is formed on the portion of the cover member 30 that corresponds to the main portion 31. In this embodiment, the connecting portion 42 is directly connected to the cover member 30. Specifically, the connecting portion 42 is fitted into the main portion 31 of the cover member 30.

[0184] The protruding piece 43 is formed at the end of the main portion 41 on the ceiling side. The protruding piece 43 is formed to stand on the inner surface 41b of the main portion 41. The protruding piece 43 protrudes to face the main plate portion 21 of the frame 20. Since the main plate portion 21 extends in the X-axis direction, as shown in FIG. 9, the protruding piece 43 also extends in the X-axis direction.

[0185] As shown in FIG. 5, an elastic member 44 is provided at the ceiling-side end of the main portion 41. The elastic member 44 is attached to the main plate portion 21 side portion of the protruding piece 43. The elastic member 44 is an elastic body made of, for example, a resin material, and is elastically deformable. In this embodiment, the elastic member 44 is made of an elastomer. As an example, the elastic member 44 is made of silicone rubber and has rubber elasticity. Note that the elastic member 44 made of an elastomer is not limited to a solid molded product, and may also be a foam molded product.

[0186] The elastic member 44 functions as a packing member and is provided to fill the gap between the ceiling side portion of the end cap 40 and the main plate portion 21 of the frame 20. Since the main plate portion 21 extends in the X-axis direction, as shown in FIG. 9, the elastic member 44 also extends in the X-axis direction. In this embodiment, the elastic member 44 is formed in a thin plate shape. As shown in FIG. 5, the thin plate-shaped elastic member 44 is provided in an inclined state in the gap between the ceiling side portion of the end cap 40 and the main plate portion 21 of the frame 20. The provision of the elastic member 44 can enhance the effect of preventing foreign objects such as insects from entering the space region S2 between the cover member 30 and the frame 20 (insect-repellent effect). Note that, although the elastic member 44 is provided in this embodiment, the elastic member 44 need not be provided. In this case, it is preferable that the gap between the end cap 40 and the frame 20 be as small as possible.

[0187] In the present embodiment, the connecting portion 42 and the cover member 30 are in contact with each other, but this is not limiting. For example, a ring-shaped packing member may be disposed between the connecting portion 42 and the cover member 30 so as to surround the connecting portion 42. In this case, the packing member is inserted between the outer peripheral end of the inner surface 41b of the main portion 41 and the end face of the main portion 31 of the cover member 30.

[0188] The end cap 40 configured in this manner is fixed to the cover member 30. In this case, the end cap 40 is provided so that no gap is formed between it and the cover member 30. Specifically, the end cap 40 is fitted into the open end of the cover member 30 so that the connection portion 42 contacts the inner surface of the cover member 30. This makes the outer peripheral edge of the main portion 41 of the end cap 40 and the outer peripheral surface of the cover member 30 form a continuous surface.

[0189] The end cap 40 and the cover member 30 may be fixed to each other with an adhesive or ultrasonic welding. Alternatively, the end cap 40 and the cover member 30 may be provided with a locking structure such as a claw or a recess to join them together.

[0190] 3 and 4, a spatial region S3 is formed on the ceiling side of the frame 20. That is, the spatial region S3 exists between the fixture body 2 and the frame 20. The spatial region S3 is also part or all of the recess 2a of the fixture body 2.

[0191] A power supply unit 400 is located in this spatial region S3. In other words, the power supply unit 400 is located on the ceiling side of the frame 20. In this embodiment, the center position of the power supply unit 400 is approximately the same as the center position of the lighting device 3 in the short direction (X-axis direction). Therefore, the power supply unit 400 is located in the center of the short direction of the lighting device 3 (the short direction of the frame 20) in spatial region S3. This is not essential, and the center position of the power supply unit 400 may be offset from the center position of the lighting device 3 in the short direction. In other words, the power supply unit 400 may be located biased toward the short direction of the lighting device 3 (the short direction of the frame 20) in spatial region S3. For example, the power supply unit 400 may be located biased toward the side of the hanging bracket 5 (the left side in Figure 4). In addition, in this embodiment, the side plate portion 24 of the frame 20 is short, and the circuit board 411 of the power supply unit 400 is located closer to the ceiling than the tip of the side plate portion 24 of the frame 20 within the first holding member 450.

[0192] Furthermore, since the portion of the first retaining member 450 of the power supply unit 400 that faces the frame 20 is open, the second direction side of the horizontal plate portion 23 is open toward the first retaining member 450 of the power supply unit 400. Therefore, the spatial area formed by the protruding portion 20b of the frame 20 and the spatial area inside the first retaining member 450 are in communication. This makes it possible to effectively utilize the spatial area formed by the protruding portion 20b of the frame 20.

[0193] The space S3 between the fixture body 2 and the frame 20 may contain the wires used for the lighting device 3. The wires used for the lighting device 3 include construction wires (construction wiring) that are wired when the lighting fixture 1 is installed on the ceiling or the like, and internal wiring (internal wiring) that is wired in the factory when the lighting device 3 is manufactured.

[0194] Construction wiring includes power lines such as VVF cables and signal lines such as dimming signal lines. Construction wiring such as power lines and signal lines are, for example, drawn out from the ceiling and connected to predetermined locations on the lighting fixture 1 during its installation. For example, power lines such as VVF cables are connected to the power terminal block 8, and dimming signal lines are connected to the functional unit 600, which is a dimming terminal block. Internal wiring of fixtures arranged in spatial area S3 includes the aforementioned cables 65 and other internal wiring of fixtures. Furthermore, functional components such as the aforementioned function expansion modules may be housed in spatial area S3.

[0195] Furthermore, since duct wiring may be installed inside the lighting fixture 1, it is desirable that the spatial area S3 between the lighting device 3 and the recess 2a of the fixture body 2 has enough space for at least one power line such as a VVF cable to pass through. In addition, the duct wiring may be held (temporarily held or positioned) on the fixture body 2 side, or it may be held (temporarily held or positioned) on the lighting device 3 side.

[0196] As an example, FIG. 4 shows an example in which a signal line 60 is arranged in the spatial region S3 as a construction electric wire. When the power supply unit 400 is arranged unevenly in the short-side direction (X-axis direction) of the lighting device 3 in the spatial region S3, the area on one side of the spatial region S3 where the power supply unit 400 is present is larger than the area on the other side in the short-side direction of the lighting device 3. That is, one of the two sides of the power supply unit 400 in the spatial region S3 is a wide area, and the other of the two sides of the power supply unit 400 in the spatial region S3 is a narrow area. Therefore, it is preferable to arrange the construction electric wire in the wider of the two areas on both sides of the power supply unit 400. In particular, in this embodiment, the length (height) of the side plate portion 24 of the frame 20 is shortened, which further increases the vertical space of the spatial region S3 around the side plate portion 24. Therefore, the construction electric wire can be arranged by effectively utilizing this increased spatial region S3. For example, the construction wires can be arranged close to the ceiling end of the spatial region S3 on the fixture body 2 side. In this way, the construction wires can be arranged by effectively utilizing the wide spatial region S3, which prevents the lighting device 3 from being lifted due to interference from the construction wires, thereby preventing a gap from being created between the fixture body 2 and the lighting device 3.

[0197] Furthermore, the construction wires may be arranged separately in a wide area and a narrow area in the spatial area S3. In this case, the VVF cable 61, which is a relatively thick wire, may be arranged in the wide area of ​​the two areas on either side of the power supply unit 400, and the signal wire 60, which is a relatively thin wire, may be arranged in the narrow area of ​​the two areas on either side of the power supply unit 400.

[0198] In this embodiment, the power supply units 400 are not arranged unevenly in the width direction of the frame 20, but are arranged in the center of the width direction of the frame 20. Therefore, the construction wires and the internal wires of the fixture may be arranged on both sides of the power supply unit 400. In other words, wiring insertion portions may be provided on both sides of the power supply unit 400 in the width direction of the frame 20.

[0199] Furthermore, functional components such as a function expansion module may be disposed in the spatial region S3. In this case, the function expansion module may be provided in the lighting device 3 (for example, at an end of the power supply unit 400), or may be attached to the fixture body 2 at a distance from the lighting device 3. Furthermore, the function expansion module may not be pre-installed in the lighting fixture 1, but may be able to be added later by an installer, or may be interchangeable so that it can be replaced with a different function.

[0200] 3 and 4, in the lighting device 3 according to the present embodiment, a spatial region is formed on the ceiling side of the protrusion 20b formed on the frame 20 by the protrusion 20b. This spatial region can also be used to store components such as functional parts or internal electric wires. Note that the use of this spatial region is not limited to storing components such as functional parts or internal electric wires, and this spatial region can also be used for centering metal fittings, positioning metal fittings, guiding metal fittings, earthing conductivity, etc.

[0201] The lighting device 3 configured as described above is housed in the recess 2a of the fixture body 2 and attached to the fixture body 2. Specifically, the lighting device 3 is attached to the fixture body 2 using a hook 5 and an elastic holding member 6 shown in Figures 3, 6 and 7. The hook 5 and the elastic holding member 6 are fixed to the frame 20.

[0202] As shown in FIG. 3, the hook fitting 5 is arranged on the ceiling side of the frame 20. The hook fitting 5 is a plate member made of sheet metal. The hook fitting 5 is fixed to the end of the frame 20. As an example, the hook fitting 5 is fixed to the frame 20 with a fixing member such as a screw, and extends so as to protrude outward from the frame 20. The hook fitting 5 is hooked onto the fixture main body 2. In this embodiment, a slit 2c (see FIG. 2) is provided on the inner wall surface of the recess 2a of the fixture main body 2, and the hook fitting 5 is hooked onto this slit 2c.

[0203] The elastic holding member 6 is a component for attaching the lighting device 3 to the fixture body 2. In the present embodiment, the elastic holding member 6 is, for example, a spring such as a kick spring, and the lighting device 3 is pulled up toward the fixture body 2 by the elastic force of the elastic holding member 6. The elastic holding member 6 is attached to the ceiling side (rear surface) of the main board portion 21 of the frame 20. Specifically, the elastic holding member 6 is fixed to an end portion of the frame 20 in the width direction. In the present embodiment, the elastic holding member 6 is fixed to the frame 20 on the opposite side from the hooking metal fitting 5 in the width direction. In this case, the elastic holding member 6 is fixed to the frame 20 by a fixing member such as a screw. Specifically, the elastic holding member 6 is fixed to a holding metal fitting 5c ​​(see FIG. 7 ) fixed to the frame 20 by a mounting screw. In the present embodiment, a part of the fitting base 5a of the hooking metal fitting 5 functions as the holding metal fitting 5c. The elastic holding member 6 is detachably attached to the fixture body 2. In this embodiment, the elastic holding member 6 is detachably engaged with a metal receiving fixture 7 fixed to the instrument body 2.

[0204] 2, two hooks 5 and two elastic holding members 6 are provided at each end of the frame 20 in the longitudinal direction, but this is not limiting. Also, the hooks 5 and the elastic holding members 6 are provided at positions facing each other in the lateral direction of the frame 20, but this is not limiting.

[0205] Next, a method for attaching the lighting device 3 to the fixture body 2 will be described with reference to Fig. 10. Fig. 10 is a diagram for explaining the method for attaching the lighting device 3 to the fixture body 2 in the lighting fixture 1 according to the embodiment. Note that Fig. 10 does not show the power connector 420 and the first opening 480 of the power supply unit 400.

[0206] When attaching the lighting device 3 to the fixture body 2 installed on the ceiling 100, first, as shown in Figure 10(a), the metal tip 5b (see Figure 7) of the hooking metal fitting 5 is hooked into the slit 2c (see Figure 2) provided in the fixture body 2 to hang the lighting device 3 in a cantilevered state, and the power supply unit 400 is connected to the power line drawn from the ceiling. Next, one end of the elastic holding member 6, which is a kick spring, is engaged with the receiving metal fitting 7 fixed to the fixture body 2.

[0207] Next, as shown in (b) of Figure 10, the hook fitting 5 is pushed deep into the slit 2c while the lighting device 3 is rotated around the hook fitting 5 as a fulcrum, thereby pushing the lighting device 3 up into the recess 2a of the fixture body 2.

[0208] In this case, if the power supply unit 400 is positioned, for example, in the width direction of the frame 20, close to the rotation axis when rotating the lighting device 3, the lighting device 3 can be rotated with a small force because the heavy power supply unit 400 is positioned close to the rotation axis.

[0209] 10(c), the lighting device 3 can be fitted into the recess 2a of the fixture body 2 by rotating the lighting device 3 and pushing it into the recess 2a of the fixture body 2. At this time, the lighting device 3 is pulled up by the spring elastic force of the elastic holding member 6 (kick spring), so that the outer extension portion 32a of the extension portion 32 abuts against the opening edge 2a1 of the recess 2a of the fixture body 2. This allows the lighting device 3 to be attached to the fixture body 2.

[0210] When removing the lighting device 3 from the fixture body 2, the above-described operations can be reversed to remove the lighting device 3 from the fixture body 2. For example, the lighting device 3 can be removed from the fixture body 2 by rotating the lighting device 3 while pulling it down.

[0211] [Attachment structure of power supply unit 400 to frame 20] Next, referring to FIGS. 1 to 10 , a mounting structure of the power supply unit 400 in the lighting device 3 to the frame 20 will be described using FIGS. 11 to 17 . FIG. 11 is a perspective view showing the configuration of the lighting device 3 according to an embodiment. In FIG. 11 , the cable 65 is schematically represented by a dashed line. FIG. 12 is an exploded perspective view of the power supply unit 400 according to the embodiment. FIG. 13 is a partially enlarged view showing stoppers 453 a and 453 b of the first holding member 450 according to the embodiment. FIG. 14 is a partially cross-sectional view showing a state in which the first protrusion 460 according to the embodiment is inserted into the first through-hole 27. FIG. 15 is a partially cross-sectional view showing a state in which the first fixing portion 470 according to the embodiment is fixed to the frame 20. FIG. 16A is a first view showing a procedure for mounting the power supply unit 400 according to the embodiment to the frame 20. FIG. 16B is a second view showing a procedure for mounting the power supply unit 400 according to the embodiment to the frame 20. FIG. 17 is a plan view showing the first through-hole 27 and the first horizontal portion 462 of the first protrusion 460 according to the embodiment side by side.

[0212] 11, the lighting device 3 according to this embodiment includes a light source section 10, a power supply unit 400 that supplies power to the light source section 10, and a frame 20 to which the light source section 10 and the power supply unit 400 are attached. The lighting device 3 further includes a cable 65 connected to the power supply unit 400. In this embodiment, the light source section 10 is disposed on one side of the frame 20 in the thickness direction (Z-axis direction), and the power supply unit 400 is disposed on the other side of the thickness direction.

[0213] In this embodiment, the cable 65 is a signal wiring connected to the functional unit 600 and the power supply unit 400. The power supply unit 400 receives a dimming signal transmitted from outside the lighting device 3 via the functional unit 600 and the cable 65, and controls the power supplied to the light source unit 10 in accordance with the dimming signal.

[0214] The cable 65 is an insulated wire containing two or more wires. In this embodiment, as shown in Figure 11, a hook fitting 5 is positioned between the functional unit 600 and the power supply unit 400, and a part of the hook fitting 5 functions as a guide part 5d that guides the cable 65. The guide part 5d is a pair of guide walls erected on the fitting base 5a of the hook fitting 5, and has a pair of guide walls facing each other in the short direction (X-axis direction) of the frame 20. A space is formed between the pair of guide walls that extends in the longitudinal direction (Y-axis direction) of the frame 20, and a part of the cable 65 in the longitudinal direction (Y-axis direction) is positioned in this space. This restricts the position of the cable 65 at least in the X-axis direction. As a result, for example, when performing the installation work of the lighting device 3 to the fixture body 2 (see Figure 10), the position of the cable 65 is stabilized, making the installation work easier. The cable 65 is further fixed to the frame 20 by fixing tape 69, as shown in Figure 11. More specifically, the fixing tape 69 is positioned to fix the cable 65 in a plan view (when viewed from the negative Z-axis direction, the same applies hereafter) at a position spaced apart from the tip of the elastic retaining member 6 (kick spring) in the X-axis direction. This prevents the tip of the elastic retaining member 6 from damaging the cable 65 due to the restoring force of the elastic retaining member 6 during the installation of the lighting device 3 to the fixture body 2. In addition, the first opening 480, which is the insertion hole for the cable 65 in the power supply unit 400, is positioned so as not to face the tip of the elastic retaining member 6 in the Y-axis direction. In other words, the position of the tip of the elastic retaining member 6 in the X-axis direction is different from the position of the tip of the elastic retaining member 6 in the X-axis direction. More specifically, the position where the cable 65 is fixed by the fixing tape 69 in the X-axis direction, and the position of the first opening 480 in the X-axis direction are located in the negative X-axis direction from the tip of the elastic retaining member 6. That is, in this embodiment, the cable 65 is arranged in the lighting device 3 in a manner that avoids interference with the tip end of the elastic holding member 6 and does not increase the length of the cable 65.

[0215] As shown in FIG. 12 , the power supply unit 400 according to this embodiment includes a power supply circuit 410 and a first holding member 450 that houses the power supply circuit 410. More specifically, the power supply unit 400 further includes an insulating member 430 that is arranged to cover the power supply circuit 410 from above and below. The insulating member 430 includes a first insulating member 431 and a second insulating member 432, both of which have a generally U-shaped cross section. The first insulating member 431 and the second insulating member 432 electrically insulate the power supply circuit 410 from the first holding member 450 and the frame 20, which are all made of metal. The first insulating member 431 and the second insulating member 432 are formed of a resin such as polypropylene (PP) or polyethylene terephthalate (PET). It is not essential that the insulating member 430 include the first insulating member 431 and the second insulating member 432 that are separate from each other. The insulating member 430 may include only the first insulating member 431 of the first insulating member 431 and the second insulating member 432. Furthermore, for example, if an insulating coating is applied to the inner surface of the first holding member 450 and the portion of the frame 20 where the power supply unit 400 is disposed, the power supply unit 400 does not need to include the insulating member 430.

[0216] The power supply circuit 410 includes a circuit board 411, such as a printed wiring board, and a power connector 420, a first signal connector 425, and a conductive portion 429, which are arranged on the circuit board 411. Note that other electronic components 415 (not shown) are also arranged on the circuit board 411, but illustration and description of these other electronic components 415 are omitted. The power connector 420 is a connector to which internal wiring (not shown) extending from the power terminal block 8 (see FIG. 2) is connected. A connection port for the internal wiring (not shown) in the power connector 420 is exposed to the outside through a connector opening 459 of the first holding member 450. The first signal connector 425 is a connector to which a cable 65 is connected. The conductive portion 429 is a connector to which a pair of connection pins 15 (see FIG. 9) connected to the light source unit 10 are connected. The conductive portion 429 has a pair of pin insertion holes 429a into which the pair of connection pins 15 are inserted. That is, in this embodiment, the power supply circuit 410 receives AC power via the power supply connector 420 and converts the received AC power into DC power in accordance with the dimming signal received by the first signal connector 425. The power supply circuit 410 further supplies the converted DC power to the light source unit 10 via the conductive unit 429. As a result, the light source unit 10 lights up, for example, at a brightness in accordance with the dimming signal. In this embodiment, the circuit board 411 of the power supply circuit 410 is supported by four board support parts 473 provided on the first holding member 450 and is fixed to the first holding member 450 by fixing screws 55 (see FIG. 12 ). The first holding member 450 has board fixing parts 475 having screw holes that screw into the fixing screws 55.

[0217] The first holding member 450 according to the present embodiment has a first protrusion 460 and a first fixing portion 470, which are portions attached to the frame 20. As shown in FIGS. 12 and 14 , the first protrusion 460 is inserted into a first through-hole 27 formed in the main plate portion 21 of the frame 20 and engages with the frame 20. As shown in FIGS. 12 and 15 , the first fixing portion 470 is fixed to the frame 20 at a position different from that of the first protrusion 460. In other words, the power supply unit 400 is attached to the frame 20 by having one portion (the first protrusion 460) engage with the frame 20 and another portion (the first fixing portion 470) fixed to the frame 20. In the present embodiment, the first fixing portion 470 is fixed by a fastening member 50. The first fixing portion 470 may be fixed to the frame 20 by a method other than fastening with the fastening member 50 (such as a screw or a rivet). As a method for fixing the first fixing portion 470 to the frame 20, caulking such as TOX (registered trademark) caulking, welding such as spot welding, connection using a metal fitting other than the fastening member 50, or the like may be adopted.

[0218] In the present embodiment, in the power supply unit 400, the conductive portion 429, which supplies power to the light source unit 10 by conducting electrical current with the light source unit 10, is located near the first fixing portion 470. Specifically, when viewed in the thickness direction (Z-axis direction) of the frame 20, the conductive portion 429 is located closer to the first fixing portion 470 than the first protrusion 460. The first fixing portion 470 is fixed to the frame 20 by a mechanical joining method such as fastening or crimping. Therefore, the conductive portion 429 located near the first fixing portion 470 is less likely to become misaligned. As a result, electrical continuity between the conductive portion 429 and the light source unit 10 via the pair of connection pins 15 is more stably maintained. Furthermore, when attaching the power supply unit 400 to the frame 20, the electrodes 13a and 13b of the light source unit 10 can be accurately aligned with the pair of pin insertion holes 429a.

[0219] The first holding member 450 according to the present embodiment has a first opening 480 through which the cable 65 is disposed. As shown in FIGS. 11 to 13 , the first opening 480 is provided on an end surface of the first holding member 450 in the longitudinal direction (Y-axis direction) of the power supply unit 400. The first opening 480 is a keyhole-shaped portion cut out from a first edge 451 of the first holding member 450. More specifically, as shown in FIG. 13 , when viewed from the direction in which the cable 65 passes through, the first opening 480 has a first narrow portion 482 that includes the first edge 451 and a first wide portion 485 that is continuous with the first narrow portion 482. The maximum width of the first wide portion 485 is greater than the minimum width of the first narrow portion 482. The widths of the first narrow portion 482 and the first wide portion 485 are widths in the short-side direction (X-axis direction) of the frame 20, and are also referred to as "horizontal widths," for example. The short side direction (X-axis direction) of the frame 20 can also be said to be a direction perpendicular to the insertion direction of the cable 65 into the first opening 480 (negative Z-axis direction) and the penetration direction of the cable 65 (Y-axis direction).

[0220] When cable 65 is inserted into first opening 480 having the above configuration from the side of first edge 451 (first direction), cable 65 is held by first wide portion 485. As a result, for example, cable 65 is prevented from falling out of first narrow portion 482 due to its own weight. The shape of first opening 480 and the relationship between the size of first opening 480 and the thickness of cable 65 will be described later with reference to FIGS. 26 and 27 .

[0221] First holding member 450 according to this embodiment further includes stopper 453a provided on side wall portion 452a facing the Y-axis direction (thickness direction facing the Y-axis direction) and stopper 453b provided on side wall portion 452b facing the X-axis direction (thickness direction facing the X-axis direction) (see FIG. 13). More specifically, stopper 453a protruding in the positive X-axis direction is provided on the edge of side wall portion 452a facing the positive X-axis direction. Stopper 453b protruding in the negative Y-axis direction is provided on the edge of side wall portion 452b facing the negative Y-axis direction.

[0222] Stopper 453a is positioned so as to come into contact with the edge of side wall 452b in the negative Y-axis direction, and stopper 453b is positioned so as to come into contact with the edge of side wall 452a in the positive X-axis direction. Therefore, for example, stopper 453a can suppress deformation of side wall 452a in the positive Y-axis direction, and stopper 453b can suppress deformation of side wall 452b in the negative X-axis direction. Therefore, stoppers 453a and 453b function as parts that determine the orientation of side wall 452a and 452b during the bending process of a metal plate to form box-shaped first holding member 450 (see FIG. 12 ). Stoppers 453a and 453b also function as parts that limit deformation of side wall 452a and 452b when an impact is applied to lighting device 3 in the second direction (toward the ceiling) during installation of lighting device 3 to lighting fixture 1. For example, stopper 453a suppresses deformation of side wall portion 452a caused by the impact. This effect becomes more pronounced as stopper 453a is positioned closer to frame 20. However, in order for stopper 453a to exert its function of suppressing misalignment of first insulating member 431 (described later), it is preferable that the position of stopper 453a in the Z-axis direction be within a range facing first insulating wall portion 431a (see FIG. 12) of first insulating member 431 in the Y-axis direction.

[0223] In the present embodiment, stoppers 453a provided on sidewall portions 452a of first holding member 450 also function as portions for restricting movement of sheet-like first insulating member 431 and second insulating member 432. Specifically, in the present embodiment, first holding member 450 is formed into a box shape (see FIG. 12) by bending a metal plate, and gaps may exist between adjacent sidewall portions. For example, as shown in FIG. 13, a gap large enough to allow at least one of sheet-like first insulating member 431 and second insulating member 432 to enter may be formed between sidewall portion 452a facing the Y-axis direction and sidewall portion 452b facing the X-axis direction in first holding member 450. For example, assume that the size of the gap is approximately the same as or greater than the thickness of first insulating member 431. In this case, the end of first insulating wall portion 431a (see FIG. 12) facing the X-axis direction of first insulating member 431, which is located in the negative Y-axis direction, may enter the gap. As a result, the first insulating member 431 may become misaligned. This may cause a decrease in insulation between the power supply circuit 410 and the first holding member 450. To address this problem, the first holding member 450 according to this embodiment includes a stopper 453a that protrudes in the positive X-axis direction at the edge of the side wall portion 452a (thickness direction of the side wall portion 452a) facing the Y-axis direction (i.e., the thickness direction of the side wall portion 452a faces the Y-axis direction) and that is located in the positive X-axis direction. The stopper 453a prevents the first insulating wall portion 431a from entering the gap between the side wall portion 452a and the side wall portion 452b. This prevents the first insulating member 431 from becoming misaligned. As a result, insulation between the power supply circuit 410 and the first holding member 450 is maintained or improved. The stopper 453a can also prevent the second insulating wall portion 432a (see FIG. 12) of the second insulating member 432 from entering the gap between the side wall portion 452a and the side wall portion 452b. In other words, the stopper 453a can also suppress the displacement of the second insulating member 432.

[0224] Also, assume that at least one of the first insulating member 431 and the second insulating member 432 has an insulating wall portion facing the Y-axis direction (with its thickness direction facing the Y-axis direction) at its end in the negative Y-axis direction. In this case, stopper 453b provided on side wall portion 452b of first holding member 450 can suppress movement (positional deviation) of the insulating wall portion in the positive X-axis direction.

[0225] In the present embodiment, stoppers are provided at both ends of each of four side wall portions (side wall portions 452a, 452b, 452c, and 452d, see FIG. 12) of first holding member 450. That is, a stopper provided on one of two adjacent side wall portions abuts against the other side wall portion, thereby suppressing deformation of the one side wall portion. Furthermore, each of these multiple stoppers (including stoppers 453a and 453b) can suppress misalignment of at least one of first insulating member 431 and second insulating member 432.

[0226] It is not essential to provide stoppers at both ends of each of the four side wall portions. When first holding member 450 includes stoppers, the number of stoppers may be one. For example, first holding member 450 may include only stopper 453a shown in FIG. 13 as the stopper that suppresses deformation of side wall portion 452a of first holding member 450 and / or displacement of insulating member 430. However, from the viewpoint of ease of manufacturing box-shaped first holding member 450 and / or more reliably suppressing displacement of insulating member 430, it is preferable to have a large number of stoppers arranged at different positions.

[0227] In the present embodiment, as shown in FIG. 12 , the second insulating member 432 has a gap cover portion 435 for closing a gap at the first opening 480 through which the cable 65 passes. Specifically, as described above, the cable 65 is held by the first wide portion 485 of the first opening 480. Therefore, the first narrow portion 482 (see FIG. 13 ) of the first opening 480 can become a gap connecting the inside and outside of the first holding member 450. Therefore, in the present embodiment, the gap cover portion 435 is provided in the second insulating member 432 so as to close the gap at the first opening 480. This prevents, for example, foreign objects such as insects from entering the inside of the first holding member 450 through the gap at the first opening 480. In addition, the gap cover portion 435 may be provided, for example, to extend in the negative X-axis direction from the second insulating wall portion 432 a of the second insulating member 432. The gap cover portion 435 may be provided so as to extend from the first insulating wall portion 431a of the first insulating member 431 in the negative X-axis direction, for example.

[0228] When the power supply unit 400 configured as described above is attached to the frame 20, the power supply unit 400 is attached to the frame 20 in the procedure shown in Figures 16A and 16B. At the time when the power supply unit 400 is attached to the frame 20, the cable 65 is connected to the first signal connector 425 and a portion of the cable 65 is held in the first opening 480 (see Figures 11 to 13), but the cable 65 is not shown in Figures 16A and 16B. Also, other members attached to the frame 20, such as the light source unit 10, are not shown in Figures 16A and 16B.

[0229] When attaching the power supply unit 400 to the frame 20, first, as shown in Fig. 16A, the first horizontal portion 462 of the first protrusion 460 is inserted into the first through-hole 27 of the frame 20. That is, in the present embodiment, before the power supply unit 400 is attached to the frame 20, the first protrusion 460 has a shape including a first vertical portion 461 and a first horizontal portion 462. When the power supply unit 400 is attached to the frame 20, the first vertical portion 461 is a portion that extends in the thickness direction of the frame 20, and the first horizontal portion 462 is a portion that extends in a direction perpendicular to the thickness direction.

[0230] After the tip of the first horizontal portion 462 is inserted into the first through-hole 27, the first horizontal portion 462 is further inserted into the first through-hole 27 to position the power supply unit 400 along the main plate 21 of the frame 20. At this time, the position of the power supply unit 400 in the Y-axis direction is adjusted so that the screw hole 472 (see FIG. 15) of the first fixing portion 470 overlaps with the first fixing hole 29a provided in the main plate 21 of the frame 20. Furthermore, the shaft portion 52 (see FIG. 15) of the fastening member 50 is inserted into the first fixing hole 29a from the positive direction of the Z-axis (the light source 10 side) and the shaft portion 52 is screwed into the screw hole 472. As a result, as shown in FIG. 16B, the power supply unit 400 is attached to (or fixed to) the frame 20. After the lighting device 3 is assembled, the head portion 51 (see FIG. 15) of the fastening member 50 is housed in the spatial region between the extension portion 32 and the frame 20 (see FIG. 3).

[0231] 9 and 12, in this embodiment, the first protrusions 460 are disposed at both ends in the X-axis direction of the end of the first holding member 450 in the negative Y-axis direction. The first fixing portions 470 are disposed at both ends in the X-axis direction of the end of the first holding member 450 in the positive Y-axis direction. The frame 20 is provided with a first through-hole 27 at each position corresponding to the two first protrusions 460, and a first fixing hole 29a at each position corresponding to the two first fixing portions 470. That is, in this embodiment, each of the two first protrusions 460 engages with the first through-hole 27 of the frame 20, and each of the two first fixing portions 470 is fixed by a fastening member 50 that penetrates the first fixing hole 29a of the frame 20. Therefore, for example, the power supply unit 400 is supported by the frame 20 in a well-balanced manner in both the longitudinal direction (Y-axis direction) and the lateral direction (X-axis direction) of the power supply unit 400.

[0232] The power supply unit 400 does not need to include multiple first protrusions 460, nor does it need to include multiple first fixing portions 470. For example, only one first protrusion 460 may be disposed at the center of the X-axis direction at the end of the first holding member 450 in the negative Y-axis direction. Only one first fixing portion 470 may be disposed at the center of the X-axis direction at the end of the first holding member 450 in the positive Y-axis direction. The positions of the first protrusion 460 and the first fixing portion 470 are not particularly limited, as long as the first protrusion 460 and the first fixing portion 470 are disposed at different positions. For example, the first protrusion 460 may be disposed at the end of the first holding member 450 in the positive Y-axis direction, and the first fixing portion 470 may be disposed at the end of the first holding member 450 in the negative Y-axis direction. However, in this embodiment, since the power supply unit 400 is elongated in the Y-axis direction, from the viewpoint of supporting the power supply unit 400 on the frame 20 in a balanced manner, it is preferable that one of the first protrusion portion 460 and the first fixing portion 470 is arranged at one end of the power supply unit 400 in the Y-axis direction, and the other of the first protrusion portion 460 and the first fixing portion 470 is arranged at the other end of the power supply unit 400 in the Y-axis direction.

[0233] In the present embodiment, the widths in the X-axis direction and the Y-axis direction of first through hole 27 provided in main plate portion 21 of frame 20 are large enough to allow first protrusion 460 to be inserted therein. In other words, first through hole 27 is larger than the cross section of the portion of first protrusion 460 that passes through first through hole 27 and the portion that is disposed inside first through hole 27 (see FIG. 14 ). Note that in the present embodiment, the thickness (width in the Z-axis direction) of first horizontal portion 462 of first protrusion 460 is the same as the thickness (width in the Y-axis direction) of first vertical portion 461 shown in FIG. 17 .

[0234] In this way, the size of the first through hole 27 in a plan view is larger than the width of the first protrusion 460 in the X-axis direction and the Y-axis direction, which facilitates the attachment of the power supply unit 400 to the frame 20 during assembly of the lighting device 3. However, in this case, for example, the gap between the periphery of the first through hole 27 and the first protrusion 460 may serve as a path for foreign matter, such as insects, to enter the spatial region S2 between the cover member 30 and the frame 20. Foreign matter that has entered the spatial region S2 blocks light emitted from the light source unit 10 and may be visually recognized as a shadow. In other words, a problem of a reduction in the quality of illumination light from the lighting device 3 may occur. In this regard, for example, it is conceivable to set the width of the first through hole 27 in the Y-axis direction to be approximately the same as the thickness (plate thickness) of the first protrusion 460. However, in this case, once the insertion of the first protrusion 460 into the first through hole 27 is complete, movement of the first holding member 450 in the Y-axis direction is substantially impossible. As a result, it may be difficult to accurately align the first fixing portion 470 with the first fixing hole 29a of the frame 20. To address this problem, in this embodiment, as shown in FIG. 16B , the first vertical portion 461 of the first protrusion 460 is designed to be in contact with or close to a portion of the periphery of the first through hole 27 in the negative Y-axis direction. Furthermore, the first horizontal portion 462 extends in the negative Y-axis direction. As a result, when viewed from the spatial region S3, the entire or almost entire gap between the periphery of the first through hole 27 and the first protrusion 460 is blocked by the first protrusion 460. This prevents foreign objects such as insects from entering the spatial region S2 in which the light source unit 10 is disposed.

[0235] Furthermore, the width of first through hole 27 in the X-axis direction may be approximately the same as the width of a portion of first protrusion 460 (see FIG. 14) that is disposed inside first through hole 27. This, for example, suppresses misalignment of power supply unit 400 in the X-axis direction. Furthermore, in this embodiment, first protrusion 460 has a tapered shape as shown in FIG. 17, which ensures ease of insertion into first through hole 27. Specifically, first horizontal portion 462 of first protrusion 460 has rounded portions 463 at both ends in the X-axis direction at the end in the protruding direction (negative Y-axis direction). This ensures ease of insertion of first protrusion 460 into first through hole 27 even when the width of first through hole 27 in the X-axis direction is relatively small.

[0236] In the present embodiment, the shape of first through hole 27 in a plan view is a substantially rectangular shape with four rounded corners, i.e., with rounded portions at the four corners. In this case, for example, when first protrusion 460 is inserted into first through hole 27, the first protrusion 460 may scrape away the rounded portions at the periphery of first through hole 27, resulting in the insulating coating at the periphery of first through hole 27 being peeled off. In this case, for example, by establishing electrical conduction between first metal holding member 450 and metal frame 20, frame 20 can be grounded via first holding member 450.

[0237] [Modifications of the first protrusion 460 and the first through hole 27] Next, various modifications of the first protrusion 460 and the first through-hole 27 will be described with reference to FIGS.

[0238] Furthermore, the first projection 460a, etc., described below, are parts that the power supply unit 400 may have in place of or in addition to the first projection 460. The first through hole 27a, etc., are parts that the frame 20 may have in place of or in addition to the first through hole 27.

[0239] FIG. 18 is a plan view showing several modified examples of the first protrusion 460 according to the embodiment. As shown in FIG. 18(a), the power supply unit 400 may include a first protrusion 460a having a C-shaped surface 463a. Specifically, the first protrusion 460a has the C-shaped surface 463a, which is formed by chamfering the first horizontal portion 462a at both ends in the X-axis direction at the end in the protruding direction (negative Y-axis direction) of the first horizontal portion 462a. In other words, the first protrusion 460a has a tapered tip. This ensures that the first protrusion 460a can be easily inserted into the first through-hole 27.

[0240] As shown in FIG. 18(b), the power supply unit 400 may include a first protrusion 460b having an inclined surface 463b that is inclined in a plan view. Specifically, the first protrusion 460b has inclined surfaces 463b at both ends in the X-axis direction of the end (tip) of the first horizontal portion 462b in the protruding direction (negative Y-axis direction), connecting the tip and the end of the first vertical portion 461 in the X-axis direction. In other words, the first protrusion 460b has a tapered tip. This ensures that the first protrusion 460b can be easily inserted into the first through-hole 27. In FIG. 18(b), the inclined surface 463b is linear, but at least a portion of the inclined surface 463b in a plan view may be curved.

[0241] As shown in FIG. 18(c), the power supply unit 400 may include a first protrusion 460c having a rounded tip 464c. Specifically, the first protrusion 460c has the rounded tip 464c over the entire end of the first horizontal portion 462c in the protruding direction (negative Y-axis direction). In other words, the first protrusion 460c has a tapered tip. This ensures that the first protrusion 460c can be easily inserted into the first through-hole 27. The rounded tip 464c may have the same shape as a part of a circle or a part of an ellipse.

[0242] The power supply unit 400 may be provided with a first protrusion having two or more shapes selected from the C-surface portion 463a, the inclined surface portion 463b, and the rounded tip portion 464c.

[0243] FIG. 19 is a plan view showing several modified examples of the first through hole 27 according to the embodiment. As shown in FIG. 19(a), the frame 20 may include a rectangular first through hole 27a. As shown in FIG. 19(b), the frame 20 may include a polygonal first through hole 27b having a C-chamfered shape at one end in the X-axis direction. As shown in FIG. 19(c), the frame 20 may include a first through hole 27c having an oval shape that is elongated in the X-axis direction. As shown in FIG. 19(d), the frame 20 may include a polygonal first through hole 27d having a C-chamfered shape at both ends in the X-axis direction.

[0244] These first through holes 27a to 27d may be formed to have a size that allows insertion of the first horizontal portion 462 and the first vertical portion 461. Furthermore, when the first through holes 27b, 27c, and 27d have a shape that includes a C-surface portion or an R-portion at at least one of both ends in the X-axis direction, like the first through holes 27b, 27c, and 27d, electrical continuity between the first holding member 450 and the frame 20 may be achieved by peeling off the insulating coating on the C-surface portion or the R-portion.

[0245] 20 is a diagram showing an example of the shape of a first protrusion 460d that has an insertion guide portion 465. As shown in FIG. 20, the power supply unit 400 may have a first protrusion 460d that has an insertion guide portion 465. Specifically, the first protrusion 460d has an insertion guide portion 465 that points more in the positive Z-axis direction as it progresses in the negative Y-axis direction, at the end of the first horizontal portion 462d in the protruding direction (negative Y-axis direction). This further improves the ease of insertion of the first protrusion 460d into the first through-hole 27.

[0246] FIG. 21 illustrates a procedure for forming a first protrusion 460e by inserting a portion of the first holding member 450 into the first through-hole 27 and then bending the portion. As illustrated in FIG. 21(a), a portion of the end of the first holding member 450 in the positive direction of the Z axis is inserted into the first through-hole 27 of the frame 20. Then, as illustrated in FIG. 21(b), the portion of the first holding member 450 that penetrates the first through-hole 27 is bent in the negative direction of the Y axis to form a first horizontal portion 462e. In this manner, the first protrusion 460e illustrated in FIG. 21(b) may be formed. In this case, the shape of the first protrusion 460e can be substantially the same as the shape of the first protrusion 460 according to the embodiment (see FIG. 14). Note that the portion of the first holding member 450 that penetrates the first through-hole 27 may be bent in the positive direction of the Y axis. However, from the viewpoint of preventing foreign matter such as insects from entering the spatial region S2 by the first horizontal portion 462e, it is preferable that the part of the first holding member 450 be bent in the negative Y-axis direction.

[0247] FIG. 22 illustrates a procedure for forming a first protrusion 460f by inserting a portion of the first holding member 450 into the first through-hole 27 and then bending the portion at an angle greater than 90°. As illustrated in FIG. 22(a), a portion of the end of the first holding member 450 in the positive direction of the Z axis is inserted into the first through-hole 27 of the frame 20. Then, as illustrated in FIG. 22(b), the portion of the first holding member 450 that passed through the first through-hole 27 is bent in the negative direction of the Y axis to form a first horizontal portion 462f. At this time, the bending position of the portion of the first holding member 450 in the Z axis direction is located further in the positive direction of the Z axis than the main plate portion 21 of the frame 20. This allows the portion of the first holding member 450 to be bent at an angle greater than 90°, as illustrated in FIG. 22(b). As a result, the holding force of the power supply unit 400 by the frame 20 is improved. Furthermore, movement (vibration) of the power supply unit 400 in the Z axis direction is more reliably suppressed.

[0248] Note that, when the first protrusion 460 on which the first horizontal portion 462 is formed in advance is engaged with the first through-hole 27 of the frame 20 as in the embodiment (see FIGS. 16A and 16B ), the first horizontal portion 462 may be inclined upward (in the negative direction of the Z axis) like the first horizontal portion 462f. In other words, as long as the first horizontal portion 462 of the first protrusion 460 can be inserted into the first through-hole 27 and the power supply unit 400 can be oriented along the main plate 21 of the frame 20, the angle formed between the first horizontal portion 462 and the first vertical portion 461 may be smaller than 90°. This provides the above-described effect of improving the holding force of the power supply unit 400 by the frame 20.

[0249] Fig. 23A is a first diagram showing a procedure for attaching power supply unit 400 having first protrusions 460g at both ends in the Y-axis direction to frame 20. Fig. 23B is a second diagram showing a procedure for attaching power supply unit 400 having first protrusions 460g at both ends in the Y-axis direction to frame 20. Fig. 23C is a diagram showing an example structure in which movement of power supply unit 400 is restricted by power supply stopper 130 formed by cutting and raising a part of frame 20.

[0250] 23A, the power supply unit 400 may include first protrusions 460g that protrude in the same direction (the negative Y-axis direction in FIG. 23A) on, for example, both ends in the Y-axis direction of the power supply unit 400. In this case, when attaching the power supply unit 400 to the frame 20, each of the two first protrusions 460g is inserted into the corresponding first through-hole 27. In other words, the size of the first through-hole 27 in plan view is such that the first protrusion 460g in plan view can be inserted therein.

[0251] 23B, the power supply unit 400 is slid in the protruding direction of the first protrusion 460g (the negative Y-axis direction) until the screw hole 472g of the first fixing portion 470g is positioned directly above the first fixing hole 29a. Furthermore, the shaft 52 (see FIG. 15) of the fastening member 50 is inserted into the first fixing hole 29a from the positive Z-axis direction (the light source unit 10 side) until the shaft 52 is screwed into the screw hole 472g. This brings the power supply unit 400 into a state attached (in other words, fixed) to the frame 20, as shown in FIG. 23B.

[0252] More specifically, in the present embodiment, first fixing portion 470g is a plate-shaped portion extending in the positive direction of the Y-axis and provided at an end portion in the positive direction of the Y-axis of first holding member 450. First fixing portion 470g may be formed by cutting and raising a portion of side wall portion 452c of first holding member 450, or may be provided by connecting a plate-shaped member separate from first holding member 450 to first holding member 450 by welding, crimping, fastening, or the like.

[0253] In the power supply unit 400 configured in this manner, of the two first through holes 27, the first through hole 27 in the positive direction of the Y axis is not blocked by the first horizontal portion 462g of the first protrusion 460g. However, as shown in FIGS. 23A and 23B , a portion of the gap between the peripheral edge of the first through hole 27 in the positive direction of the Y axis and the first protrusion 460g, that is, the gap in the positive direction of the Y axis at the peripheral edge, can be blocked by the first fixing portion 470g. As a result, foreign objects such as insects are prevented from entering the spatial region S2 in which the light source unit 10 is disposed through that portion of the gap.

[0254] 23A and 23B, in a structure in which a power supply unit 400 having first protrusions 460g at both ends in the Y-axis direction is attached to a frame 20, it is not essential to provide a first fixing portion 470g, which is a plate-shaped portion extending in the positive direction of the Y-axis. For example, as shown in FIG. 23C, a power supply stopper 130 that restricts movement of the power supply unit 400 in the positive direction of the Y-axis may be provided on the frame 20 by bending, i.e., cutting and raising, a portion of the frame 20. In this case, a portion of the first holding member 450 that faces the power supply stopper 130 in the Y-axis direction functions as the first fixing portion 470g1. Note that the power supply stopper 130 may not be formed by cutting and raising a portion of the frame 20, but may be provided by connecting a metal fitting that is a separate member from the frame 20 to the frame 20 by welding, crimping, fastening, or the like.

[0255] In this way, when the power supply stopper 130 restricts movement of the power supply unit 400 in the positive direction of the Y axis, the first through hole 27 in the positive direction of the Y axis out of the two first through holes 27, and / or the through hole formed by cutting and raising the power supply stopper 130, may be blocked with a film member 29 such as an adhesive sheet.

[0256] Fig. 24A is a first diagram showing a procedure for attaching power supply unit 400, which includes plate-shaped first protrusions 460h parallel to the YZ plane, to frame 20. Fig. 24B is a second diagram showing a procedure for attaching power supply unit 400, which includes plate-shaped first protrusions 460h parallel to the YZ plane, to frame 20.

[0257] As shown in FIGS. 24A and 24B, the power supply unit 400 may include a plate-shaped first protrusion 460h parallel to the YZ plane. The first protrusion 460h includes a first vertical portion 461h extending in the thickness direction of the frame 20 (the Z-axis direction) and a first horizontal portion 462h extending in a direction perpendicular to the thickness direction (the Y-axis direction in FIGS. 24A and 24B). In other words, the basic configuration of the first protrusion 460h is the same as that of the first protrusion 460 according to the embodiment. However, the first protrusion 460h differs from the first protrusion 460 according to the embodiment in that it is a plate-shaped portion parallel to the YZ plane. Even in this case, the first protrusion 460h can engage with the frame 20 while being inserted through the first through-hole 27h. 24A and 24B , the first through hole 27h is provided in the main plate 21 of the frame 20 as a slot whose width in the X-axis direction is approximately the same as the thickness (width in the X-axis direction) of the first protrusion 460h and whose length is elongated in the Y-axis direction. That is, when the first protrusion 460h is inserted into the first through hole 27h, the first protrusion 460h can move in the Y-axis direction while its movement in the X-axis direction is restricted. Furthermore, because the first through hole 27h is a long, narrow hole, the gap between the periphery of the first through hole 27h and the first protrusion 460h is relatively small. Therefore, the intrusion of foreign matter, such as insects, through the gap is suppressed. Furthermore, because the first protrusion 460h is a plate-like shape parallel to the YZ plane, it is less likely to deform when external forces are applied in the X-axis and Y-axis directions. Furthermore, whereas forming the first protrusion 460 according to the embodiment requires bending a metal plate, forming the first protrusion 460h does not require bending. That is, when the first holding member 450 including the first protrusion 460h is produced, the number of times bending is performed on the metal plate that is the base material is reduced.

[0258] 24A and 24B, the power supply unit 400 may be provided with first protrusions 460h that protrude in the same direction (the negative Y-axis direction in FIG. 24A) at, for example, both ends in the Y-axis direction of the power supply unit 400. In this case, when attaching the power supply unit 400 to the frame 20, each of the two first protrusions 460h is inserted into the first through-hole 27h that corresponds to the first protrusion 460h.

[0259] 24B, the power supply unit 400 is slid in the protruding direction of the first protrusion 460h (negative direction of the Y axis) until the screw hole 472h of the first fixing portion 470h is positioned directly above the first fixing hole 29a. Furthermore, the shaft 52 (see FIG. 15) of the fastening member 50 is inserted into the first fixing hole 29a from the positive direction of the Z axis (the light source unit 10 side), and the shaft 52 is screwed into the screw hole 472h. As a result, the power supply unit 400 is attached (in other words, fixed) to the frame 20, as shown in FIG. 24B.

[0260] 23A and 23B, the first fixing portion 470h is a plate-shaped portion extending in the positive direction of the Y-axis. Therefore, a portion of the gap between the peripheral edge of the first through-hole 27h in the positive direction of the Y-axis and the first protrusion 460h, which is the gap in the positive direction of the Y-axis at the peripheral edge, can be blocked by the first fixing portion 470h. As a result, foreign objects such as insects are prevented from entering the spatial region S2 in which the light source unit 10 is disposed through the portion of the gap. Furthermore, the power supply unit 400 including the first protrusion 460h does not necessarily need to include the first fixing portion 470h, which is a plate-shaped portion extending in the positive direction of the Y-axis. For example, the movement of the power supply unit 400 in the positive direction of the Y-axis may be restricted by a power supply stopper 130 as shown in FIG. 23C.

[0261] FIG. 25 is a side view showing multiple example shapes of the plate-like first protrusion 460 parallel to the YZ plane. As shown in FIG. 25(a), the power supply unit 400 may include a plate-like first protrusion 460m parallel to the YZ plane, the first protrusion 460m having a C-surface portion 463m. The first protrusion 460m has a first vertical portion 461m and a first horizontal portion 462m. The first protrusion 460m has C-surface portions 463m having a C-chamfered shape in side view at both ends in the Z-axis direction at the end of the first horizontal portion 462m in the protruding direction (the negative Y-axis direction). This makes it less likely that the tip portion of the first horizontal portion 462m will get caught on the peripheral edge of the first through hole 27h when the first protrusion 460m is inserted into the first through hole 27h and when the first protrusion 460m is slid in the negative Y-axis direction.

[0262] The first protrusion 460m may have an R portion instead of at least one of the two C-surface portions 463m.

[0263] As shown in FIG. 25(b), the power supply unit 400 may include a first protrusion 460n that is a plate-like first protrusion parallel to the YZ plane and has a rounded tip 464n. The first protrusion 460n has a first vertical portion 461n and a first horizontal portion 462n. The first protrusion 460n has the rounded tip 464n over the entire end of the first horizontal portion 462n in the protruding direction (the negative Y-axis direction). In other words, the first protrusion 460n has a tapered tip. This makes it less likely that the tip portion of the first horizontal portion 462n will get caught on the periphery of the first through-hole 27h when the first protrusion 460n is inserted into the first through-hole 27h and when the first protrusion 460n is slid in the negative Y-axis direction. The rounded tip 464n may have the same shape as part of a circle or part of an ellipse.

[0264] As shown in (c) of FIG. 25, the power supply unit 400 may include a first protrusion 460p having an inclined surface 463p that is inclined in a side view. The first protrusion 460p has a first vertical portion 461p and a first horizontal portion 462p. The first protrusion 460p has an inclined surface 463p at the end of the first horizontal portion 462p in the negative Z-axis direction. The inclined surface 463p is inclined in a direction progressing in the negative Z-axis direction as it approaches the first vertical portion 461p. In other words, the first protrusion 460p has a tapered tip. This makes it less likely that the tip portion of the first horizontal portion 462p will get caught on the periphery of the first through hole 27h when the first protrusion 460p is inserted into the first through hole 27h and slid in the negative Y-axis direction. In FIG. 25(c), the inclined surface portion 463p is linear, but at least a portion of the inclined surface portion 463p may be curved in side view.

[0265] Note that a C-surface portion or a rounded portion may be formed on the end portion (the lower right corner in FIG. 25) of each of the first protrusions 460m, 460n, and 460p in the positive Y-axis direction and the positive Z-axis direction of each of the first protrusions 460m, 460n, and 460p shown in FIG. 25. This improves ease of insertion of each of the first protrusions 460m, 460n, and 460p into the first through-hole 27h. Furthermore, the power supply unit 400 may be provided with a first protrusion having two or more shapes selected from the C-surface portion 463m, the rounded tip portion 464n, and the inclined surface portion 463p.

[0266] [Configuration of the first opening 480 of the power supply unit 400 and its surroundings] Next, the configuration of the first opening 480 of the power supply unit 400 and its surroundings will be described using Fig. 26 and Fig. 27, while also referring to Figs. 11 to 13, etc. Fig. 26 is a diagram showing the configuration of the first opening 480 and cable 65 of the power supply unit 400 according to the embodiment. Fig. 26 schematically shows a cross section of the cable 65 in a direction perpendicular to the longitudinal direction of the cable 65. Fig. 27 is a perspective view showing the state in which the cable 65 according to the embodiment is connected to and held by the power supply unit 400.

[0267] 11 to 13, 26, and 27, a first holding member 450 included in a power supply unit 400 according to the present embodiment has a first opening 480 through which a cable 65 electrically connected to a power supply circuit 410 is disposed. As shown in FIGS. 13 and 26, the first opening 480 is a keyhole-shaped opening cut out from a first edge 451, which is an edge of the first holding member 450. The first edge 451 is an edge of the first holding member 450 that faces the frame 20. That is, in the present embodiment, the first opening 480 is cut out in the negative Z-axis direction from the first edge 451, which is the edge of the first holding member 450 in the positive Z-axis direction, and is keyhole-shaped.

[0268] Specifically, as shown in Figure 26, the first opening 480, when viewed from the direction of cable 65 penetration (Y-axis direction), has a first narrow section 482 including the first end edge 451 and a first wide section 485 continuous with the first narrow section 482. The maximum width E of the first wide section 485 is greater than the minimum width C of the first narrow section 482. That is, E > C. Therefore, when the cable 65 is inserted into the first opening 480 from below (first direction, Z-axis positive direction), the cable 65 deforms to reduce its lateral width (width in the X-axis direction, the same applies hereafter), passes the position of the minimum width C in the first narrow section 482, and reaches the first wide section 485 where the maximum width is E. After that, the lateral width of the cable 65 becomes larger than the lateral width when passing the position of the minimum width C, for example, due to the elastic force of the cable 65. As a result, the cable 65 located in the first wide section 485 is prevented from falling out of the first narrow section 482 due to, for example, its own weight. In other words, the portion of the cable 65 located in the first wide section 485 is held in place by the first wide section 485. For example, this portion of the cable 65 is held in place by being supported by the upper end of the first narrow section 482. As shown in Figure 26, an R-shaped section is formed in the portion of the first narrow section 482 that forms the minimum width C. Therefore, damage to the cable 65 when it crosses the minimum width C is suppressed. Furthermore, the peripheral edge of the first opening 480 in the first holding member 450 may have a curled bending structure formed by curling and winding it up. This more reliably suppresses damage to the cable 65 caused by the peripheral edge of the first opening 480.

[0269] The end of the cable 65 is provided with a connector (not shown) that can be connected to a first signal connector 425 (see FIGS. 12 and 27) of the power supply circuit 410. For example, after the connector of the cable 65 is connected to the first signal connector 425, the cable 65 is inserted into the first opening 480 from the positive direction of the Z axis. The connector of the cable 65 may be connected to the first signal connector 425 after the cable 65 is inserted into the first opening 480. In either case, before the power supply unit 400 is attached to the frame 20, the cable 65 is connected to the power supply unit 400 and held in the first opening 480, as shown in FIG. 27. This prevents the cable 65 from being pinched between the power supply unit 400 and the frame 20 when attaching the power supply unit 400 to the frame 20 (see FIGS. 16A and 16B). In other words, at least a portion of the cable 65 can be held by the power supply unit 400 without using a separate component (such as a binder) to hold the cable 65 to the power supply unit 400 so that the cable 65 does not interfere with the above-mentioned installation work.

[0270] More specifically, the first narrow portion 482 has an inner protrusion 481 provided at a position adjacent to the first wide portion 485 so as to reduce the width of the first narrow portion 482. More specifically, as shown in FIG. 26 , the first narrow portion 482 has a pair of inner protrusions 481 facing each other in the X-axis direction. Each of the pair of inner protrusions 481 protrudes toward the other inner protrusion 481. As a result, the width of the gap between the pair of inner protrusions 481 becomes the minimum width C of the first narrow portion 482. In the first opening 480 configured in this manner, the portion of the cable 65 located in the first wide portion 485 is supported by, for example, at least one inner protrusion 481 of the first narrow portion 482.

[0271] In this embodiment, the width of the first narrow portion 482 decreases toward the first wide portion 485. Specifically, when viewed from the penetration direction (Y-axis direction) of the cable 65, the first narrow portion 482 has a substantially triangular shape, and the first wide portion 485 has a substantially semi-elliptical shape with one corner of the first narrow portion 482 (the apex angle of the substantially triangle) connected. The semi-elliptical shape is the shape of one of the parts obtained by dividing an ellipse into two equal parts in the longitudinal direction or lateral direction of the ellipse. Therefore, the first opening 480 has a structure in which the entrance to the first opening 480 (the end of the first narrow portion 482 in the Z-axis positive direction) is relatively wide, and the width of the first narrow portion 482 decreases toward the first wide portion 485. This ensures ease of insertion of the cable 65 into the first narrow portion 482. More specifically, the first narrow portion 482 has an inclined guide portion 484 that guides the cable 65 into the first wide portion 485, thereby gradually deforming the cable 65 inserted into the first narrow portion 482 from the positive direction of the Z axis, thereby reducing the width. In this embodiment, the first narrow portion 482 has a pair of inclined guide portions 484 that face each other in the X axis direction. The inclined guide portion 484 in the negative X axis direction is inclined more in the direction advancing toward the positive X axis direction as it progresses in the negative Z axis direction. The inclined guide portion 484 in the positive X axis direction is inclined more in the direction advancing toward the negative X axis direction as it progresses in the negative Z axis direction. Therefore, the distance between the pair of inclined guide portions 484 becomes smaller as it approaches the first wide portion 485.

[0272] In the first opening 480 having the above configuration, the smaller the minimum width C of the first narrow portion 482, the more the cable 65 is prevented from falling out of the first opening 480 in the positive direction of the Z axis. On the other hand, if the minimum width C of the first narrow portion 482 is too small, it becomes difficult for the cable 65 inserted from the first narrow portion 482 in the negative direction of the Z axis to reach the first wide portion 485. Therefore, in the lighting device 3 according to the present embodiment, the values ​​of the minimum width C and the like of the first opening 480 are determined based on the sizes of various portions of the cable 65.

[0273] Specifically, as shown in Fig. 26 , the cable 65 has two electric wires 66 and a protective tube 67 that covers the two electric wires 66. Each of these two electric wires 66 is, for example, a covered electric wire. Although Fig. 26 shows only two electric wires 66, the cable 65 may include three or more electric wires 66. In other words, the cable 65 has at least two electric wires 66.

[0274] In cable 65 configured in this manner, the outer diameter of electric wire 66 is A, the outer diameter of cable 65 is B, and the thickness of protective tube 67 is T. Furthermore, as shown in FIG. 26 , the minimum width of first narrow portion 482 is C, and the width of the end of first narrow portion 482 in the positive Z-axis direction (i.e., the width of the entrance of first opening 480) is D. Under these assumptions, the magnitude relationship between A, B, C, and D satisfies the following formula (1).

[0275] (1) A≦C <B<D

[0276] When A, B, C, and D satisfy the above formula (1), the ease of insertion of cable 65 into first opening 480 is ensured, and the cable 65 that has reached first wide portion 485 is prevented to some extent from falling out of first opening 480.

[0277] Furthermore, considering the balance between the ease of inserting cable 65 into first opening 480 and preventing cable 65 from slipping out of first opening 480, it is preferable that the minimum width C of first narrow portion 482 satisfy the following formula (2).

[0278] (2) A × 1.5 + T × 2 ≒ C

[0279] That is, when the assumed cable width S is the sum of the outer diameter (A×1.5) of 1.5 electric wires 66 and the thickness (T×2) of two layers of protective tube 67, which is the left side of the above formula (1), it is preferable that the assumed cable width S and the minimum width C of the first narrow portion 482 are substantially the same. Specifically, the minimum width C is preferably a value within ±10% of the assumed cable width S, and more preferably a value within ±5% of the assumed cable width S.

[0280] More specifically, because twisting and the like occurs in the cable 65, it is not yet determined how the two or more electric wires 66 will be arranged in the portion of the cable 65 that is inserted into the first opening 480. That is, in that portion of the cable 65, two electric wires 66 may be arranged in the Z-axis direction (see FIG. 26 ), or two electric wires 66 may be arranged in the X-axis direction. Therefore, the number of electric wires 66 arranged in the X-axis direction in the portion of the cable 65 that is inserted into the first opening 480 is estimated to be 1.5. In this case, the width of that portion of the cable 65 (i.e., the estimated cable width S) is the sum of the outer diameter of 1.5 electric wires 66 (A × 1.5) and the thickness of two layers of protective tube 67 (T × 2). Furthermore, if the minimum width C of the first narrow portion 482 is approximately the same as the above-mentioned assumed cable width S, it is relatively easy to make the cable 65 reach the first wide portion 485, and the cable 65 can be more reliably held once it has reached the first wide portion 485. As a result, the condition shown in the above formula (2) is derived as a preferable condition from the viewpoint of the balance between the ease of inserting the cable 65 into the first opening 480 and preventing the cable 65 from falling out of the first opening 480.

[0281] Furthermore, from the viewpoint of preventing the intrusion of foreign objects such as insects through the first opening 480 or stably holding the cable 65, it is preferable that the maximum width F of the first wide portion 485 in the Z-axis direction (see FIG. 26) is, for example, not more than twice the outer diameter B of the cable 65 or the maximum width E of the wide portion 485 in the ZX-axis direction.

[0282] [Modifications of the first opening 480 of the power supply unit 400] Next, modified examples of the first opening 480 will be described with reference to FIG. 28. FIG. 28 is a diagram showing multiple modified examples of the first opening 480 according to the embodiment. Like the first opening 480 according to the embodiment, each of the first openings 480a to 480g shown in FIG. 28 can hold the cable 65 inserted from the positive direction of the Z axis toward the negative direction of the Z axis so that it does not fall out in the positive direction of the Z axis. Furthermore, each of the first openings 480a to 480g shown in FIG. 28 is a portion that can be provided in the power supply unit 400 instead of or in addition to the first opening 480.

[0283] As shown in FIG. 28(a), the first holding member 450 may have a first opening 480a that is a combination of a substantially triangular shape and a substantially circular shape. Specifically, the first opening 480a has a first narrow portion 482a and a first wide portion 485a. The first narrow portion 482a has a substantially triangular shape, and the first wide portion 485a has a substantially circular shape with one corner of the first narrow portion 482a (the apex angle of the substantially triangular shape) connected. That is, the first narrow portion 482a has a pair of inner protrusions 481a that face each other in the X-axis direction. With this configuration, for example, the opening area of ​​the first opening 480a can be made relatively small. Although not shown in FIG. 28(a), a rounded portion is preferably provided in the portion of the first narrow portion 482a that forms the narrowest width (the tip portion of the inner protrusion 481a) to prevent damage to the cable 65. Furthermore, it is preferable that the peripheral edge of first opening 480a has a curled bent structure formed by curling and rolling up, from the viewpoint of suppressing damage to cable 65. These supplementary points regarding first opening 480a also apply appropriately to each of first openings 480b to 480g described below.

[0284] As shown in FIG. 28(b), the first holding member 450 may have a first opening 480b having a shape including a linear groove along the Z-axis direction. Specifically, the first opening 480b has a first narrow portion 482b and a first wide portion 485b. The first narrow portion 482b has a shape in which a linear groove along the Z-axis direction is connected to one corner of a substantially triangular shape. That is, in the first opening 480b, the minimum width portion (groove) extends in the Z-axis direction. With this configuration, for example, the cable 65 located in the first wide portion 485b is less likely to pass through the minimum width portion of the first narrow portion 482b. That is, the cable 65 is more reliably prevented from slipping out of the first opening 480b.

[0285] As shown in FIG. 28(c), the first holding member 450 may have a first opening 480c with a constant width at its end in the positive direction of the Z axis. Specifically, the first opening 480c has a first narrow portion 482c and a first wide portion 485c. The first narrow portion 482c has a generally rectangular portion at the entrance of the cable 65, i.e., at its end in the positive direction of the Z axis, and has a shape in which a generally triangular portion is connected to the generally rectangular portion. With this configuration, for example, the cable 65 can be pushed into the first wide portion 485b while the first narrow portion 482b restricts movement of the cable 65 in the X axis direction. In other words, the operation of holding the cable 65 in the first opening 480 can be performed efficiently.

[0286] 28(d), the first holding member 450 may have a first opening 480d shaped to have only one inclined guide portion 484d. Specifically, the first opening 480d has a first narrow portion 482d and a first wide portion 485d. The first narrow portion 482d has an inclined guide portion 484d only in the positive direction of the X axis at its end in the positive direction of the Z axis. In this way, even if the inclined guide portion 484d is disposed on only one side in the X axis direction, the inclined guide portion 484d can guide the cable 65 to the first wide portion 485d.

[0287] As shown in FIG. 28(e), the first holding member 450 may have a first opening 480e that is a combination of a substantially triangular shape and a substantially rectangular shape. Specifically, the first opening 480e has a first narrow portion 482e and a first wide portion 485e. The first narrow portion 482e has a substantially triangular shape, and the first wide portion 485e has a substantially rectangular shape with one corner of the first narrow portion 482e connected. The first narrow portion 482e has a pair of inner protrusions 481e that face each other in the X-axis direction. In this case, the upper side (the side in the negative Z-axis direction) of the inner protrusions 481e is substantially parallel to the X-axis direction. Therefore, for example, the cable 65 arranged in the first wide portion 485e is less likely to exceed the minimum width portion of the first narrow portion 482e (between the pair of inner protrusions 481e). In other words, the cable 65 is more reliably prevented from slipping out of the first opening 480e.

[0288] As shown in FIG. 28(f), the first holding member 450 may have a first opening 480f having an inner protrusion 481f protruding obliquely upward. Specifically, the first opening 480f has a first narrow portion 482f and a first wide portion 485f. The first narrow portion 482f is generally triangular, and the first wide portion 485f is generally rectangular and connected to one corner of the first narrow portion 482f. In other words, the shape of the first opening 480f is similar to the shape of the first opening 480e shown in FIG. 28(e). However, each of the pair of inner protrusions 481f provided in the first narrow portion 482f is inclined in the negative direction of the Z axis as it approaches the other inner protrusion 481f. In other words, the pair of inner protrusions 481f facing each other in the X axis direction protrude obliquely upward. This makes it even more difficult for the cable 65 arranged in the first wide portion 485f to go beyond the minimum width portion of the first narrow portion 482f (between the pair of inner protrusions 481f), for example. In other words, it becomes even more difficult for the cable 65 to fall out of the first opening 480f.

[0289] As shown in FIG. 28(g), the first holding member 450 may have a first opening 480g having a shape including only one inclined guide portion 484g. Specifically, the first opening 480g has a first narrow portion 482g and a first wide portion 485g. The first narrow portion 482g has an inclined guide portion 484g only in the positive X-axis direction at its end in the positive Z-axis direction. In other words, the shape of the first opening 480g is similar to the shape of the first opening 480d shown in FIG. 28(d). However, at the end in the negative X-axis direction of the first opening 480g, the first narrow portion 482g and the first wide portion 485g are connected by a single linear side extending in the Z-axis direction. In other words, the first opening 480g is an opening having a keyhole shape and an R-shape as a whole. Even in this case, the inclined guide portion 484g can guide the cable 65 to the first wide portion 485g. Furthermore, for example, the straight edge extending in the Z-axis direction at the X-axis negative end of the first opening 480g may be formed by a side wall portion 452b (see Figure 12) adjacent to the side wall portion 452a of the first holding member 450 and facing in the X-axis direction. In other words, the first opening 480g can also be formed at the boundary between the side wall portion 452a and the side wall portion 452b.

[0290] [Configuration of functional unit 600 and its peripherals] Next, the configuration of the functional unit 600 and its periphery will be described using FIGS. 29 to 33 with reference to FIGS. 11 to 13, etc. FIG. 29 is a perspective view showing the configuration of the functional unit 600 and its periphery according to the embodiment. In FIG. 29, the cable 65 is schematically represented by a dashed line. FIG. 30 is an exploded perspective view of the functional unit 600 according to the embodiment. FIG. 31 is a schematic diagram showing the arrangement of the cable 65 according to the embodiment. FIG. 32 is a perspective view showing a binder holding portion 671 provided in the functional unit 600 according to the embodiment. FIG. 33 is a perspective view showing a state in which the functional unit 600 according to the embodiment holds a plurality of signal lines 62 together. In FIG. 33, the signal lines 62 are schematically represented by a dashed line.

[0291] The functional unit 600 is a device or component having a function different from that of the power supply unit 400. In this embodiment, as shown in FIGS. 29 and 30 , the functional unit 600 has a functional component 610 that is a dimming terminal block, and a second holding component 650 that holds the functional component 610. The second holding component 650 is a component formed by bending a metal plate or the like. At least a portion of the second holding component 650 may be formed from a non-metallic material such as resin. The second holding component 650 does not need to be a single component (part). The second holding component 650 may be formed by combining multiple components (parts).

[0292] The functional member 610 has a signal input unit 611 to which one or more signal lines 62 (see FIG. 33) passing through the wiring insertion hole 2e2 (see FIG. 2) are connected, and a second signal connector 625 (see FIG. 29) to which a cable 65 is connected. More specifically, the functional member 610 has a resin case 612 that forms the outer shell of the functional member 610. A signal circuit board (not shown) on which the signal input unit 611 and the second signal connector 625 are arranged is housed inside the case 612.

[0293] 30 , the second holding member 650 is attached to the frame 20 by engaging with and fastening to the frame 20, similar to the first holding member 450. Specifically, the main plate portion 21 of the frame 20 has a second through hole 28 that penetrates in the thickness direction (Z-axis direction). The second holding member 650 of the functional unit 600 has a second protrusion portion 660 that engages with the frame 20 when inserted into the second through hole 28, and a second fixing portion 670 that is fixed to the frame 20 at a position different from the second protrusion portion 660.

[0294] The second projection 660 has a second vertical portion 661 extending in the thickness direction (Z-axis direction) of the frame 20, and a second horizontal portion 662 extending from the second vertical portion 661 in a direction perpendicular to the thickness direction (Y-axis direction). In other words, the second projection 660 has the same shape as the first projection 460 of the power supply unit 400. The shape and size of the second projection 660 are not limited to the shape and size shown in Figure 30. For example, various modifications of the first projection 460, as explained using Figures 18, 20 to 25, etc., may be applied to the second projection 660. Also, various modifications of the first through hole 27, as explained using Figure 19, etc., may be applied to the second through hole 28 into which the second projection 660 is inserted.

[0295] In this embodiment, the second fixing portion 670 is fixed to the frame 20 by a fastening member 50 that penetrates a second fixing hole 29b provided in the main plate portion 21 of the frame 20. Specifically, the second fixing portion 670 has a screw hole portion 672, and the second fixing portion 670 is fixed to the frame 20 by screwing the shaft portion 52 (see Figure 15) of the fastening member 50, which penetrates the second fixing hole 29b, into the screw hole portion 672. The method of fixing the second fixing portion 670 to the frame 20 may be other than fastening by the fastening member 50 (screws or rivets, etc.). As a method of fixing the second fixing portion 670 to the frame 20, crimping such as TOX® crimping, welding such as spot welding, connection with metal fittings other than the fastening member 50, etc. may be employed.

[0296] In this embodiment, as shown in FIGS. 30 and 32 , second fixing portions 670 are arranged at both ends of the second holding member 650 in the X-axis direction. The second holding member 650 further has an attachment portion 658 to which the functional member 610 is attached and a second opening 680 through which the cable 65 is disposed. The attachment portion 658 has an opening into which the attachment portion 620 of the functional member 610 is inserted, allowing the functional member 610 to be attached to the second holding member 650 by snap-in. In this embodiment, the second holding member 650 has a first engaging protrusion 655 (see FIG. 30 ) that protrudes toward the functional member 610, and the first engaging protrusion 655 engages with the second engaging protrusion 615 provided on the functional member 610. This more reliably prevents the functional member 610 attached to the second holding member 650 from shifting in position. An end portion of the second holding member 650 in the negative Z-axis direction is provided with a bent portion 659 formed by bending a part of the metal plate that forms the second holding member 650 (see FIG. 29). This prevents the second holding member 650 from damaging wiring such as the VVF cable 61 when the wiring is arranged between the second holding member 650 and the fixture main body 2 in the Z-axis direction.

[0297] There are no particular limitations on the method of attaching the functional member 610 to the second holding member 650. For example, the functional member 610 may be attached to the second holding member 650 by fastening with screws or rivets, joining with an adhesive, or by crimping a part of the second holding member 650. The functional member 610 and the second holding member 650 may be integrated. For example, a case forming an outer shell of the functional member 610 may function as the second holding member 650. In other words, the functional member 610 itself may be treated as the functional unit 600.

[0298] The second opening 680 is a keyhole-shaped opening cut out from a second edge 651, which is an edge of the second holding member 650. More specifically, when viewed from the direction in which the cable 65 penetrates (the Y-axis direction), the second opening 680 has a second narrow portion 682 that includes the second edge 651, and a second wide portion 685 that is continuous with the second narrow portion 682. The maximum width of the second wide portion 685 is greater than the minimum width of the second narrow portion 682. More specifically, in this embodiment, when viewed from the direction in which the cable 65 penetrates (the Y-axis direction), the second narrow portion 682 has a substantially triangular shape, and the second wide portion 685 has a substantially semi-elliptical shape in which one corner of the second narrow portion 682 (the apex angle of the substantially triangle) is connected. Therefore, the second opening 680 has a structure in which the entrance to the second opening 680 (the end of the second narrow portion 682 in the negative Z-axis direction) is relatively wide, and the width of the second narrow portion 682 becomes smaller as it approaches the second wide portion 685. This ensures ease of insertion of the cable 65 into the second narrow portion 682. In this way, the second opening 680 has a shape similar to that of the first opening 480 of the power supply unit 400. The shape, size, etc. of the second opening 680 are not limited to the shape, size, etc. shown in FIGS. 29 and 30 . For example, the various modified examples of the first opening 480 described using FIG. 2 and the like may be applied to the second opening 680.

[0299] When the second wide portion 685 has a substantially semi-elliptical or circular shape, the gap between the peripheral edge of the second wide portion 685 and the cable 65 passing through the second wide portion 685 is relatively small. This reduces the movement of insects or other foreign objects through the gap. If the functional component 610 is, for example, a receiver that receives remote control signals, foreign objects such as insects that enter the functional unit 600 may interfere with reception of the remote control signals. In this regard, as described above, reducing the gap between the peripheral edge of the second wide portion 685 and the cable 65 is useful from the perspective of reducing degradation of the functionality of the functional component 610 due to foreign objects such as insects. The same applies when the functional component 610 is a sensor that detects brightness, etc.

[0300] When attaching the functional unit 600 configured in this way to the frame 20, for example, the functional member 610 is attached to the second retaining member 650 after it has been attached to the frame 20. Specifically, the second projection 660 that protrudes in the positive Y-axis direction at the Y-axis positive end of the second retaining member 650 is inserted into the second through hole 28 of the frame 20. Then, the functional unit 600 is positioned to be aligned with the main plate portion 21 of the frame 20. At this time, the position of the functional unit 600 in the Y-axis direction is adjusted so that the screw hole portion 672 of the second fixing portion 670 aligns with the second fixing hole 29b provided in the main plate portion 21 of the frame 20. Furthermore, the shaft portion 52 (see Figure 15) of the fastening member 50 is inserted into the second fixing hole 29b from the positive Z-axis direction (light source portion 10 side) and the shaft portion 52 is screwed into the screw hole portion 672. As a result, the second retaining member 650 is attached to (in other words, fixed to) the frame 20.

[0301] Furthermore, the functional member 610 is attached to the second retaining member 650. Specifically, after connecting the cable 65 to the second signal connector 625 located on the signal circuit board (not shown), the signal circuit board (not shown) is housed in the case 612. Then, the functional member 610 is attached to the second retaining member 650. At this time, since the second opening 680 is a keyhole-shaped opening provided in the shape of a notch from the second end edge 651 of the second retaining member 650, the cable 65 can be easily inserted into the second opening 680 from above (in the negative Z-axis direction). In addition, in this embodiment, the second opening 680 is located on a straight line connecting the second signal connector 625 and the guide portion 5d (see Figure 11) that guides the cable 65. This makes it easier to attach the functional member 610 to the second retaining member 650, for example, by inserting the cable 65 into the second opening 680.

[0302] It is also possible to attach the functional member 610 to the second holding member 650, and then attach the second holding member 650 to which the functional member 610 is attached (that is, the functional unit 600) to the frame 20.

[0303] Furthermore, when one end of the cable 65 is connected to the second signal connector 625, the other end of the cable 65 may be connected to the first signal connector 425 of the power supply unit 400 (see FIGS. 12 and 27). Furthermore, for example, after the functional unit 600 is attached to the frame 20, the other end of the cable 65 may be connected to the first signal connector 425 and the power supply unit 400 may be attached to the frame 20 (see FIGS. 16A and 16B).

[0304] In this embodiment, the functional unit 600 is disposed alongside the power supply unit 400 on the second direction side (ceiling side) of the main board 21 of the frame 20. Specifically, the functional unit 600 and the power supply unit 400 are arranged at a predetermined interval in the longitudinal direction (Y-axis direction) of the frame 20. In this configuration, the first opening 480 of the power supply unit 400 opens towards the functional unit 600, and the second opening 680 of the functional unit 600 opens towards the power supply unit 400. As a result, as schematically shown in FIG. 31 , for example, the length of the cable 65 that transmits a dimming signal from the functional unit 600 to the power supply unit 400 can be made relatively short. That is, for example, in cases where the functional unit 600 and the power supply unit 400 cannot be disposed close to each other due to the arrangement of other components such as the hook 5 and the elastic holding member, the functional unit 600 and the power supply unit 400 can be connected via a relatively short cable 65. Therefore, the occurrence of the intrusion of external noise and / or the cable 65 being caught by other components due to the length of the cable 65 is suppressed.

[0305] Furthermore, in this embodiment, first opening 480 is cut out from a first edge 451 of first holding member 450 in the positive direction of the Z axis, and second opening 680 is cut out from a second edge 651 of second holding member 650 in the negative direction of the Z axis. That is, first opening 480 and second opening 680 have keyhole shapes that face opposite directions in the Z axis direction.

[0306] In this embodiment, one or more signal lines 62 connected to a signal input unit 611 are held by a second holding member 650 via a binder 700 shown in FIG. 33. As a result, for example, when the lighting device 3 is attached to the fixture body 2 (see FIG. 10), if the one or more signal lines 62 are pulled, damage to the signal input unit 611 and / or the one or more signal lines 62 caused by the tension is suppressed. As shown in FIG. 32, the binder 700 according to this embodiment includes a long binding band part 710, a band locking part 720 provided at an end of the binding band part 710 and locking the binding band part 710 at an arbitrary position of the binding band part 710, and an insertion protrusion 730 provided on the band locking part 720. As shown in FIG. 33, the binder 700 configured in this manner is attached to a second holding member 650 in a state in which it binds one or more signal lines 62 (four signal lines in FIG. 33). 30 , the second holding member 650 has a flat plate portion 675 in which a binder through hole 676 is formed. The binder 700 is attached to the second holding member 650 by inserting the insertion protrusion 730 of the binder 700, which has bound one or more signal wires 62, into the binder through hole 676.

[0307] Note that one or more signal lines 62 may be bound with the binding band portion 710 after the binding device 700 is attached to the second holding member 650. Furthermore, the insertion protrusion 730 of the binding device 700 may be detachably engaged with the binding device through-hole 676. In this case, the binding device 700 preferably has a structure that allows the insertion protrusion 730 to be removed from the binding device through-hole 676 by elastically deforming the insertion protrusion 730 with an external force from a person's finger, for example. Furthermore, although FIG. 33 illustrates a portion of the binding band portion 710 that protrudes from the band engaging portion 720, this protruding portion can be cut off. This prevents the binding band portion 710 from interfering with the installation of the lighting device 3 to the fixture body 2 (see FIG. 10 ).

[0308] The second retaining member 650 according to this embodiment has a fastener holding portion 671 for temporarily holding the fastener 700. The fastener holding portion 671 is a holding hole provided in a part of the second retaining member 650, and holds the fastener 700 with the fastening band portion 710 inserted. This allows the fastener 700 to be included in the box (cardboard box, etc.) that houses the lighting device 3 when it is shipped from the factory. More specifically, the fastener 700 can be held in the fastener holding portion 671 when the lighting device 3 is shipped from the factory. Therefore, for example, there is no need for a separate material such as adhesive tape to fix the fastener 700 to any part of the lighting device 3.

[0309] In Figure 32, the fastener holder 671 is positioned at the end of the second retaining member 650 in the positive Y-axis direction. However, the fastener holder 671 may also be positioned at the end of the second retaining member 650 in the negative Y-axis direction. In this case, the fastener 700 is inserted into the fastener holder 671 with the tip of the fastening band portion 710 facing in the positive Y-axis direction. In this case, the band locking portion 720 cannot pass through the fastener holder 671, thus preventing the fastener 700 from coming out of the fastener holder 671 in the positive Y-axis direction. Furthermore, if the fastener 700 attempts to come out of the fastener holder 671 in the negative Y-axis direction, the side wall of the box (cardboard box, etc.) housing the lighting device 3 can prevent the fastener 700 from coming out of the fastener holder 671.

[0310] [Modification of the arrangement of the cable 65] Modified examples of the arrangement of the cable 65 connecting the functional unit 600 and the power supply unit 400 will be described with reference to Fig. 34A and Fig. 34B. Fig. 34A is a schematic diagram showing a first modified example of the arrangement of the cable 65 according to the embodiment. Fig. 34B is a schematic diagram showing a second modified example of the arrangement of the cable 65 according to the embodiment.

[0311] As shown in FIG. 34A , the functional unit 600 may have a keyhole-shaped second opening 680a cut out from a second edge of the second holding member 650, which is the edge in the positive direction of the Z axis. That is, the first opening 480 and the second opening 680 may have keyhole shapes oriented in the same direction in the Z axis direction. In this case, the second opening 680a and the first opening 480 prevent the cable 65 from floating above the frame 20. That is, the cable 65 can be easily positioned along the main plate 21 of the frame 20 between the functional unit 600 and the power supply unit 400. This makes it easy to fix any portion of the cable 65 between the functional unit 600 and the power supply unit 400 to the main plate 21. Furthermore, the overall length of the cable 65 can be shortened compared to when the cable 65 is arranged as shown in FIG. 31 .

[0312] 34B, the second opening 680b of the functional unit 600 may be open facing away from the power supply unit 400. In this case, the cable 65 extending from the second opening 680b in the negative Y-axis direction can be connected to the first signal connector 425 of the power supply unit 400 by being folded back in the positive Y-axis direction at least at one point. This configuration is useful when there is space suitable for arranging the cable 65 in the positive X-axis direction, negative X-axis direction, or negative Z-axis direction of the functional unit 600, for example.

[0313] The power supply unit 400 may have a keyhole-shaped first opening 480 at a position different from the end face in the Y-axis direction. The functional unit 600 may have a keyhole-shaped second opening 680 at a position different from the end face in the Y-axis direction. For example, the power supply unit 400 may have the first opening 480 at an end face in the positive direction of the X-axis, and the functional unit 600 may have the second opening 680 at an end face in the positive direction of the X-axis. In this case, part of the cable 65 may be arranged in a space formed on the ceiling side of the protrusion 20b of the frame 20 in the positive direction of the X-axis.

[0314] [summary] The configuration and effects of the lighting device 3 according to this embodiment are described, for example, as follows. Note that the lighting device 3 described below may also include the components described as the various modified examples above.

[0315] The lighting device 3 according to this embodiment includes a light source unit 10, a power supply unit 400 that supplies power to the light source unit 10, a frame 20 to which the light source unit 10 and the power supply unit 400 are attached, and a cable 65 connected to the power supply unit 400. The power supply unit 400 has a power supply circuit 410 electrically connected to the cable 65, and a first holding member 450 that houses the power supply circuit 410. The first holding member 450 has a first opening 480 through which the cable 65 is disposed, the first opening 480 being a keyhole-shaped notch cut out from a first edge 451 that is an edge of the first holding member 450 (see FIGS. 11 to 13 and 28, etc.).

[0316] According to this configuration, the first opening 480, which is cut out from the first edge 451 of the first holding member 450, has a keyhole shape. Therefore, by inserting the cable 65 into the first opening 480 from the first edge 451 side, the cable 65 can be positioned so as to pass through the wider portion of the first opening 480. As a result, the cable 65 is less likely to slip out from the first edge 451 side. That is, the cable 65 is stably held in the first opening 480. This reduces the likelihood of the cable 65 interfering with the attachment of the power supply unit 400 to the frame 20. For example, when attaching the power supply unit 400 to the frame 20, the cable 65 extending from the first holding member 450 is less likely to be pinched between the first edge 451 and the frame 20. In this way, the lighting device 3 according to this embodiment can be efficiently manufactured.

[0317] In this embodiment, the power supply unit 400 is elongated, and the first opening 480 is provided on an end surface of the first holding member 450 in the longitudinal direction (the Y-axis direction in this embodiment) of the power supply unit 400. This configuration makes it easy to connect the cable 65 to another member or device that is aligned with the cable 65 in the longitudinal direction of the power supply unit 400.

[0318] The lighting device 3 according to this embodiment further includes a functional unit 600. The functional unit 600 has a function different from that of the power supply unit 400, and is connected to a cable 65. The functional unit 600 includes a functional member 610 electrically connected to the cable 65, and a second holding member 650 that holds the functional member 610. The second holding member 650 has a second opening 680 through which the cable 65 is disposed. The second opening 680 is notched from a second edge 651, which is an edge of the second holding member 650, and is keyhole-shaped (see FIGS. 29, 30, 28, etc.).

[0319] According to this configuration, the second opening 680, which is cut out from the second edge 651 of the second holding member 650, has a keyhole shape. Therefore, by inserting the cable 65 into the second opening 680 from the second edge 651 side, the cable 65 can be inserted through the wider portion of the second opening 680. As a result, the cable 65 is less likely to slip out from the second edge 651 side. That is, the cable 65 is stably held in the second opening 680. Therefore, when the cable 65 is connected to the functional member 610, the cable 65 is less likely to come off the second holding member 650. That is, the position and posture of the cable 65 are easily maintained at an appropriate position and posture. This contributes to further improving the ease of assembly of the lighting device 3.

[0320] In this embodiment, the light source unit 10 is disposed on one side in the thickness direction of the frame 20 (in this embodiment, the positive direction of the Z axis). The power supply unit 400 and the functional unit 600 are disposed side by side on the other side in the thickness direction of the frame 20 (in this embodiment, the negative direction of the Z axis). The first opening 480 opens toward the functional unit 600, and the second opening 680 opens toward the power supply unit 400 (see FIG. 11).

[0321] According to this configuration, a relatively short cable can connect the power supply unit 400 and the functional unit 600. This reduces the risk of external noise being introduced due to the length of the cable 65 and / or the cable 65 being caught by other components.

[0322] The lighting device 3 according to this embodiment further includes a guide portion 5d (see FIG. 11 ) disposed between the power supply unit 400 and the functional unit 600 to guide the cable 65. This configuration allows the position of the cable 65 connecting the power supply unit 400 and the functional unit 600 to be regulated during assembly of the lighting device 3. As a result, the cable 65 is more reliably prevented from being pinched by other components between the two components. Furthermore, for example, the cable 65 can be guided so that it maintains a straight posture, thereby preventing external noise from entering the cable 65. In this embodiment, the hook 5, which is an attachment member for attaching the lighting device 3 to the fixture body 2, includes the guide portion 5d. Therefore, a separate member for guiding the cable 65 is not required. The guide portion 5d does not need to be a part of the hook 5. For example, the guide portion may be formed by cutting and raising a portion of the frame 20. Alternatively, a member for guiding the cable 65 may be attached to the frame 20 to function as the guide portion.

[0323] In this embodiment, the first edge 451 is an edge on one side in the thickness direction (in this embodiment, the positive Z-axis direction) of the first holding member 450. The second edge 651 is an edge on the other side in the thickness direction (in this embodiment, the negative Z-axis direction) of the second holding member 650.

[0324] In this configuration, the first opening 480 and the second opening 680 have keyhole shapes facing opposite directions. Therefore, for example, a cable 65 drawn out from the power supply unit 400 at a position close to the frame 20 in the thickness direction of the frame 20 can be connected to the functional unit 600 at a position far from the frame 20 in the thickness direction of the frame 20. In this case, for example, the area of ​​the main plate portion 21 on the side of the functional unit 600, on the side where the power supply unit 400 is located (positive Y-axis direction), can be used as an area for arranging other components.

[0325] In this embodiment, the first opening 480, when viewed from the direction in which the cable 65 passes through, has a first narrow portion 482 including a first end edge 451, and a first wide portion 485 continuous with the first narrow portion 482, the first wide portion 485 having a maximum width greater than the minimum width of the first narrow portion 482. For example, as shown in Figure 26, the maximum width E of the first wide portion 485 is greater than the minimum width C of the first narrow portion 482. Regarding the sizes of the first narrow portion 482 and the first wide portion 485, when viewed from the direction in which the cable 65 passes through (Y-axis direction), the opening area of ​​the first wide portion 485 may be larger than the opening area of ​​the first narrow portion 482.

[0326] According to this configuration, for example, a cable with a relatively large outer diameter can be held in the first wide portion 485, and the cable 65 held in the first wide portion 485 is prevented from passing through the first narrow portion 482 and falling out of the first opening 480.

[0327] In the present embodiment, the width of first narrow portion 482 becomes smaller as it approaches first wide portion 485 (see FIGS. 26 and 28, etc.). According to this configuration, the width of first narrow portion 482 becomes wider as it approaches first edge 451, and therefore first narrow portion 482 can guide cable 65 more smoothly to first wide portion 485. This further improves the ease of assembly of lighting device 3.

[0328] In this embodiment, when viewed from the direction in which the cable 65 passes through, the first narrow portion 482 has a substantially triangular shape, and the first wide portion 485 has a substantially circular shape (see FIG. 28(a) and the like) or a substantially semi-elliptical shape (see FIG. 26 and the like) in which one corner of the first narrow portion 482 (the apex angle of the substantially triangle) is connected. With this configuration, the cable 65 inserted into the first narrow portion 482 is efficiently guided to the first wide portion 485 by the substantially triangular first narrow portion 482. Furthermore, damage to the cable 65 due to interference between the peripheral edge of the first wide portion 485 and the cable 65 is unlikely to occur. Furthermore, for example, a gap between the peripheral edge of the first wide portion 485 and the cable 65 passing through the first wide portion 485 becomes relatively small. This, for example, inhibits the movement of insects or foreign objects through the gap.

[0329] In the present embodiment, cable 65 has two or more electric wires 66 and protective tube 67 that covers two or more electric wires 66. If the outer diameter of electric wire 66 is A, the thickness of protective tube 67 is T, and the minimum width of first narrow portion 482 is C, then A×1.5+T×2≈C is satisfied. With this configuration, first opening 480 can more reliably hold cable 65, which includes multiple electric wires 66 and protective tube 67, while preventing it from slipping out.

[0330] The various features and effects of the keyhole-shaped first opening 480 described above may also be applied to the keyhole-shaped second opening 680 as appropriate.

[0331] The lighting fixture 1 according to this embodiment includes a lighting device 3 and a fixture body 2 to which the lighting device 3 is attached (see FIGS. 1 to 4, etc.). That is, the lighting device 3 that can have the various features described above can be provided as a device that emits illumination light in the lighting fixture 1 that is placed on, for example, a ceiling.

[0332] (Other embodiments) Although the lighting fixture and lighting device according to the present invention have been described above based on the embodiments and modifications thereof, the present invention is not limited to these embodiments and modifications.

[0333] For example, the lighting device 3 may not include any one of the first through-hole 27 in the frame 20, the first protrusion 460 in the power supply unit 400, and the first fixing portion 470. The power supply unit 400 may be attached to the frame 20, for example, by only one or more fastening members 50. The power supply unit 400 may be attached to the frame 20, for example, by only engaging one or more engagement portions with the frame 20. The power supply unit 400 may be attached to the frame 20, for example, by only using an adhesive.

[0334] The lighting device 3 does not necessarily have to include the functional unit 600. The lighting device 3 may include the light source unit 10, the power supply unit 400, the frame 20, and a cable 65 connected to the power supply unit 400, and other components may be provided as appropriate depending on the functions required of the lighting device 3.

[0335] The instrument body 2 and the frame 20 are not necessarily made of metal, but at least a portion of the instrument body 2 or the frame 20 may be made of a non-metallic material such as resin.

[0336] The shape and size of the first holding member 450 are not limited to those shown in FIGS. 7, 10, and 12, etc. The first holding member 450 may have a dome-like or hemispherical shape, or may have a semi-cylindrical shape. The first holding member 450 does not have to be a single member (component). The first holding member 450 may be configured by combining multiple members (components). The same applies to the second holding member 650; the shape and size of the second holding member 650 are not limited to those shown in FIGS. 29, 30, and 32. Furthermore, the second holding member 650 does not have to be a single member (component) and may be configured by combining multiple members (components).

[0337] Although the cable 65 is described as including at least two electric wires 66 and a protective tube 67, the configuration of the cable 65 is not limited to this. For example, the cable 65 does not have to include the protective tube 67. The number of electric wires 66 included in the cable 65 may be one. The electric wire 66 included in the cable 65 may be a stranded wire or a solid wire.

[0338] The frame used in the lighting device 3 may have a shape different from the frame 20 shown in Figures 3, 4, 7, and 9. For example, the horizontal plate portion 23 is configured with the curved plate portion 23a and the inclined plate portion 23b, but this is not limited thereto. The horizontal plate portion 23 may be configured with only the curved plate portion or the parallel plate portion, or may be configured with only the inclined plate portion, for example.

[0339] In the above embodiment, the upright plate portions 22 of the frame 20 are arranged perpendicular to the main plate portion 21, but this is not limiting. For example, the upright plate portions 22 may be inclined plate portions that are arranged to be inclined with respect to the main plate portion 21. Furthermore, the position of the connection portion P1 (see the enlarged view in FIG. 3) between the horizontal plate portions 23 and the side plate portions 24 may be the same as the position of the main plate portion 21 (the bottom of the recessed portion 20a), or may be located closer to the ceiling (in the negative Z-axis direction) than the main plate portion 21 (the bottom of the recessed portion 20a).

[0340] The horizontal plate portion 23 may also be formed in a stepped shape. That is, the horizontal plate portion 23 may have a step. In this case, the stepped horizontal plate portion 23 is composed of two parallel plate portions at different heights from the main plate portion 21, but this is not limited to this. For example, the stepped horizontal plate portion 23 may have a parallel plate portion and an inclined plate portion located inside the parallel plate portion, or the stepped horizontal plate portion 23 may have a parallel plate portion and an inclined plate portion located outside the parallel plate portion and inclined inward, or the stepped horizontal plate portion 23 may have an inclined plate portion inclined outward and an inclined plate portion inclined inward. Alternatively, the horizontal plate portion 23 may be stepped having an inclined plate portion and a parallel plate portion, and the standing plate portion 22 may be an inclined plate portion, or the horizontal plate portion 23 may be stepped having two parallel plate portions, and the standing plate portion 22 may be an inclined plate portion.

[0341] Note that a reinforcing rib may be formed at the boundary between the main plate portion 21 and the standing plate portion 22. This ensures the strength of the frame even if the side plate portions 24 are short. The reinforcing rib can be formed, for example, by press working.

[0342] In the above embodiment, the side plate portions 24 of the frame 20 extend from each of the pair of horizontal plate portions 23, but this is not limited to this. For example, the side plate portions 24 of the frame 20 may extend from only one of the pair of horizontal plate portions 23. In other words, it is sufficient that the side plate portions 24 extend from at least one of the pair of horizontal plate portions 23.

[0343] In the above embodiment, the outer extension portion 32a of the cover member 30 may be part of the main portion 31. In this case, the extension portion 32 of the cover member 30 will consist of, for example, only the inner extension portion 32b, which extends from the outer extension portion 32a, which is part of the main portion 31, toward the inside of the cover member 30.

[0344] Furthermore, in the above embodiment, when attaching the lighting device 3 to the fixture body 2, the lighting device 3 was attached to the fixture body 2 by rotating the lighting device 3, but this is not limited to this. In other words, the lighting device 3 may be attached to the fixture body 2 without rotating it. Specifically, the lighting device 3 may be attached to the fixture body 2 by hooking a leaf spring or the like provided on the lighting device 3 onto the fixture body 2 installed on the ceiling, and moving the lighting device 3 vertically so as to move it parallel to the fixture body 2. In this case, the lighting device 3 can be attached to the fixture body 2 by pushing the lighting device 3 vertically into the recess 2a of the fixture body 2 and fitting it in place.

[0345] In the above embodiment, the lighting fixture 1 is a ceiling-mounted lighting fixture in which the fixture body 2 is directly installed on the ceiling surface, but this is not limited to this. For example, the lighting fixture 1 may be a ceiling-embedded lighting fixture in which the fixture body 2 is embedded in the ceiling.

[0346] Furthermore, in the above embodiment, an SMD type LED element in which an LED chip is mounted in a package is used as the LED 12, and the light-emitting module consisting of the substrate 11 and the LED 12 is an SMD type LED module, but it is not limited to this. For example, the light-emitting module consisting of the substrate 11 and the LED 12 may be a COB (Chip On Board) type LED module. In this case, the LED chip (bare chip) itself can be used as the LED 12, and a plurality of LEDs 12 (LED chips) can be arranged linearly on the substrate 11, and the plurality of LEDs 12 can be sealed together or individually with a sealing member (for example, a phosphor-containing resin).

[0347] Furthermore, although the above embodiment uses a cover member 30 having both diffusive and light-transmitting properties, it is not limited to this. For example, instead of the cover member 30, a light-transmitting cover having only light-transmitting properties may be used. In this case, a transparent cover with such high transmittance that one can see through to the other side may be used as the light-transmitting cover.

[0348] In the above embodiment, the lighting device 3 and the lighting fixture 1 are elongated base lights, but this is not limiting. For example, the technology of the present disclosure may be applied to a downlight, a square ceiling light, or other lighting fixtures.

[0349] Furthermore, although the technology of the present disclosure has been applied to the lighting device 3 and lighting fixture 1 in which the light source unit 10 is configured with an LED, the present disclosure is not limited to this. For example, the technology of the present disclosure may be applied to a lighting fixture or lighting fixture in which the light source unit is configured with a fluorescent lamp or the like.

[0350] In addition, the present disclosure also includes embodiments obtained by various modifications of the above-described embodiments that a person skilled in the art would conceive, and embodiments realized by arbitrarily combining the components and functions of the embodiments within the scope of the present invention. Furthermore, the present invention also includes any combination of two or more claims from among the multiple claims set forth in the claims at the time of filing, provided that there is no technical contradiction. For example, when a dependent claim set forth in the claims at the time of filing is made into a multiple claim or multiple multiple claims that cite all of the superordinate claims within the scope of the technical contradiction, the present invention also includes all combinations of claims included in that multiple claim or multiple multiple claims. [Explanation of symbols]

[0351] 1. Lighting equipment 2. Device body 3. Lighting equipment 5d Guide section 10 Light source section 20 frames 27, 27a, 27b, 27c, 27d, 27h First through hole 28 Second through hole 29 Membrane members 29a First fixing hole 29b Second fixing hole 50 Fastening members 65 Cable 66 Electric wire 67 Protective tube 69 Fixing Tape 400 power supply unit 410 Power supply circuit 450 first retaining member 451 First edge 480, 480a, 480b, 480c, 480d, 480e, 480f, 480g First opening 482, 482a, 482b, 482c, 482d, 482e, 482f, 482g First narrow part 485, 485a, 485b, 485c, 485d, 485e, 485f, 485g First wide section 600 functional units 610 Functional Materials 650 Second retaining member 651 Second edge 680, 680a, 680b Second opening 682 Second narrow part 685 Second wide section

Claims

1. A light source unit; a power supply unit that supplies power to the light source unit; a frame to which the light source unit and the power supply unit are attached; a cable connected to the power supply unit, the power supply unit includes a power supply circuit electrically connected to the cable and a first holding member that houses the power supply circuit; The first holding member has a first opening through which the cable is disposed, the first opening having a keyhole shape cut out from a first end edge that is an end edge of the first holding member. Lighting equipment.

2. The power supply unit is elongated, the first opening is provided on an end surface of the first holding member in a longitudinal direction of the power supply unit; The lighting device according to claim 1 .

3. Further, a functional unit having a function different from the power supply unit and connected to the cable is provided, the functional unit includes a functional member electrically connected to the cable and a second holding member that holds the functional member; the second holding member has a second opening through which the cable is disposed; The second opening is cut out from a second edge of the second holding member and has a keyhole shape.

3. The lighting device according to claim 1 or 2.

4. the light source unit is disposed on one side of the frame in a thickness direction, the power supply unit and the functional unit are arranged side by side on the other side of the frame in the thickness direction, the first opening is open toward the functional unit, the second opening is open toward the power supply unit.

4. The lighting device according to claim 3.

5. The power supply unit further includes a guide portion disposed between the power supply unit and the functional unit, for guiding the cable.

5. The lighting device according to claim 4.

6. the first edge is an edge of the first holding member on the one side in the thickness direction, The second edge is an edge of the second holding member on the other side in the thickness direction.

5. The lighting device according to claim 4.

7. When viewed from the cable penetration direction, the first opening has a first narrow portion including the first edge, and a first wide portion continuous with the first narrow portion, the first wide portion having a maximum width greater than a minimum width of the first narrow portion.

3. The lighting device according to claim 1 or 2.

8. The width of the first narrow portion decreases toward the first wide portion.

8. The lighting device according to claim 7.

9. When viewed from the cable penetration direction, the first narrow portion has a substantially triangular shape, and the first wide portion has a substantially circular or semi-elliptical shape with one corner of the first narrow portion connected.

9. The lighting device according to claim 8.

10. The cable includes two or more electric wires and a protective tube that covers the two or more electric wires, When the outer diameter of the electric wire is A, the thickness of the protective tube is T, and the minimum width of the first narrow portion is C, A×1.5+T×2≒C is satisfied.

8. The lighting device according to claim 7.

11. The lighting device according to claim 1 or 2; and a fixture body to which the lighting device is attached. Lighting fixtures.

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