Lighting devices and lighting fixtures

Abstract

This prevents foreign matter such as insects and dust from entering the space between the cover member and the frame, and also prevents excessive deformation of the extended portion of the cover member. [Solution] The lighting device 3 comprises a light source unit 10, a long frame 20 having a main plate portion 21 to which the light source unit 10 is attached, a long cover member 30 having a main portion 31 that covers the light source unit 10 and an extended portion 32 that extends toward the light source unit 10, and an end cap 40 provided at the longitudinal end of the cover member 30. The end cap 40 has a main portion 41, a mounting surface 41c formed on the inner surface 41a of the main portion 41, a fixing region P1 that is fixed to the cover member 30 at the mounting surface 41c, and a non-fixing region P2 provided at the end of the end cap 40 in the width direction. The non-fixing region P2 has a non-contact region R1 provided in the longitudinal direction of the cover member 30, in a direction away from the longitudinal end of the cover member 30.

Description

Technical Field

[0001] The present invention relates to a lighting device and a lighting fixture.

Background Art

[0002] Lighting fixtures using LEDs (Light Emitting Diodes) are known. For example, as a lighting fixture installed on a ceiling, there is known a lighting fixture including a long lighting device called a light bar and a long fixture body having a recess to which the lighting device is detachably attached (Patent Document 1).

[0003] The lighting device in the lighting fixture disclosed in Patent Document 1 includes a light source unit composed of LEDs, a long and translucent cover member covering the light source unit, a long frame supporting the light source unit and to which the cover member is attached, and a pair of end caps closing both ends in the longitudinal direction of the cover member. The cover member has a main part covering the light source unit and an extending part extending toward the light source unit.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a lighting device, there is a risk that foreign matters such as insects and dust may enter the space area (insect-proof area) between the cover member and the frame. For this reason, a lighting device having an insect-proof structure for suppressing the entry of foreign matters such as insects and dust has been proposed.

[0006] However, in conventional lighting devices, the extended portion of the cover member is covered and fixed by the protruding portion of the end cap to prevent movement. As a result, dimensional variations in the cover member and other components cannot be absorbed, and there is a risk that foreign objects such as insects and dust may enter the space between the cover member and the frame.

[0007] Furthermore, if the extended portion of the cover member is made movable so that it can bend and deform, there is a risk that the extended portion may deform too much and crack.

[0008] This invention has been made in view of the problems of the prior art. The object of this invention is to provide a lighting device and lighting fixture that can prevent foreign matter such as insects and dust from entering the space between the cover member and the frame, and that can prevent excessive deformation of the extended portion of the cover member. [Means for solving the problem]

[0009] To solve the above problems, an embodiment of the present invention provides a lighting device comprising: a light source unit; a long frame having a main plate portion to which the light source unit is attached; a long cover member covering the light source unit; and an end cap provided at the longitudinal end of the cover member, wherein the end cap has a cap body; a contact surface formed on the inner surface of the cap body and in contact with the longitudinal end of the cover member; a fixing region fixed to the cover member at the contact surface; and a non-fixing region provided at the end of the end cap in a direction corresponding to the short direction of the cover member, wherein the non-fixing region has a non-contact region provided in the longitudinal direction of the cover member in a direction away from the longitudinal end of the cover member.

[0010] Furthermore, an embodiment of the present invention comprises the above-mentioned lighting device and a fixture body having a recess to which the lighting device is attached. [Effects of the Invention]

[0011] According to this disclosure, it is possible to provide a lighting device and lighting fixture that can prevent foreign matter such as insects and dust from entering the space between the cover member and the frame, and that can prevent excessive deformation of the extended portion of the cover member. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a perspective view of a lighting fixture according to an embodiment. [Figure 2] Figure 2 is an exploded perspective view of a lighting fixture according to an embodiment. [Figure 3] Figure 3 is a cross-sectional view of a lighting fixture according to an embodiment. [Figure 4] Figure 4 is a perspective view of the lighting device according to the embodiment, as seen from the ceiling. [Figure 5] Figure 5 is an exploded perspective view of the lighting device according to the embodiment. [Figure 6] Figure 6 is an exploded perspective view of the part shown in Figure 5. [Figure 7] Figure 7 is a partial cross-sectional view of a lighting device according to an embodiment. [Figure 8] Figure 8 shows how the adhesive applied to the fitting portion of the end cap flows along the outer wall surface of the fitting portion. [Figure 9] Figure 9 is a front view of the end cap according to the embodiment, as seen from the inner side. [Figure 10] Figure 10 is a front view of the end cap according to the embodiment, as seen from the inner side. [Figure 11] Figure 11 is a partially enlarged cross-sectional view showing a modified end cap. [Figure 12] Figure 12 is a partially enlarged cross-sectional view showing a modified end cap. [Figure 13] Figure 13 is a partially enlarged cross-sectional view showing a modified end cap. [Figure 14] Figure 14 is a partially enlarged perspective view showing a modified end cap. [Figure 15]FIG. 15 is an enlarged perspective view of the main part of the lighting device according to the embodiment as seen from the ceiling side. [Figure 16] FIG. 16 is a perspective view of the fitting base of the hanging fitting. [Figure 17] FIG. 17 is an enlarged perspective view of the main part of the frame with the hanging fitting and the elastic holding member attached as seen from the floor side. [Figure 18] FIG. 18 is a cross-sectional view taken along the line A-A of FIG. 17. [Figure 19] FIG. 19 is a diagram showing a modified example of a part for positioning the elastic holding member. [Figure 20] FIG. 20 is a diagram showing a modified example of a part for positioning the elastic holding member. [Figure 21] FIG. 21 is a partially enlarged front view showing a modified example of the end cap. [Figure 22] FIG. 22 is a partially enlarged perspective view showing a modified example of the end cap. [Figure 23] FIG. 23 is a partially enlarged front view showing a modified example of the end cap. [Figure 24] FIG. 24 is a partially enlarged perspective view showing a modified example of the end cap. [Figure 25] FIG. 25 is a partially enlarged cross-sectional view before attachment of the cover member to the frame showing a modified example. [Figure 26] FIG. 26 is a partially enlarged cross-sectional view after attachment of the cover member to the frame showing a modified example.

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments and modifications of the present invention will be described with reference to the drawings. Note that the embodiments and modifications described below are all specific examples of the present invention. Therefore, the numerical values, components, arrangement positions and connection configurations of components, as well as the processes and their sequences shown in the following embodiments and modifications, are examples only and are not intended to limit the present invention. Accordingly, among the components in the following embodiments and modifications, those not described in the independent claims representing the highest-level concept of the present invention will be described as optional components.

[0014] The figures are schematic and not necessarily strictly accurate. Furthermore, the same reference numerals are used for substantially identical components in each figure, and redundant explanations are omitted or simplified. In each figure, the X, Y, and Z axes represent the three axes of a three-dimensional Cartesian coordinate system. In this embodiment, the Z-axis direction is defined as the vertical direction, and the direction perpendicular to the Z-axis (parallel to the XY plane) is defined as the horizontal direction. The X and Y axes are mutually orthogonal and both are perpendicular to the Z-axis. In this specification, the terms "up" and "down" do not necessarily refer to the absolute upward (vertically upward) and downward (vertically downward) directions in spatial perception. Also, in this specification, "approximately," "about," and "approximately" include manufacturing tolerances or dimensional tolerances. For example, "approximately," "about," and "approximately" mean within ±5%. Furthermore, the drawings may be schematic diagrams with appropriate emphasis, omissions, and ratio adjustments to illustrate the present invention. In other words, the shape, positional relationships, and size ratios of the components shown in the drawings may differ from the actual shape, positional relationships, and size ratios.

[0015] (Embodiment) [Regarding the overall configuration of lighting fixture 1] First, the configuration of the lighting fixture 1 according to the embodiment will be explained using Figures 1 to 3. Figure 1 is a perspective view of the lighting fixture 1 according to the embodiment. Figure 2 is an exploded perspective view of the lighting fixture 1. Figure 3 is a cross-sectional view of the lighting fixture 1, showing the cross-section when cut by a plane parallel to the shorter side of the lighting fixture 1. Also, Figure 3 shows a cross-section of the part where the power supply unit 400 is not present.

[0016] As shown in Figures 1 to 3, the lighting fixture 1 comprises 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 LEDs as a light source, and the lighting fixture 1 is an LED lighting fixture that uses the lighting device 3 as a light source.

[0017] Lighting fixture 1 and lighting device 3 are elongated. The total length of lighting fixture 1 and lighting device 3 is, for example, 2 feet, 4 feet, or 8 feet. In this embodiment, the total length of lighting device 3 is 2 feet. Note that 1 foot (= 1 [ft]) is 304.8 [mm].

[0018] As shown in Figure 3, the lighting fixture 1, which consists of a fixture body 2 and a lighting device 3, has a D-shaped cross-section when viewed from the longitudinal direction of the lighting fixture 1, resulting in a clean design where the boundary between the fixture body 2 and the lighting device 3 is not noticeable.

[0019] 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 on a predetermined building material such as the ceiling or wall in a room of a building such as a facility, office building, shop, or residence. In this embodiment, the lighting fixture 1 is a ceiling light installed on the ceiling of a building. For example, the lighting fixture 1 is a ceiling-mounted LED light, and the fixture body 2 is installed on the ceiling surface. In this case, the lighting fixture 1 installed on the ceiling emits illumination light toward the floor, with the floor direction (floor side) being a predetermined direction. The illumination light is emitted from the lighting device 3 of the lighting fixture 1.

[0020] When installing lighting fixture 1 on a ceiling, the fixture body 2 of lighting fixture 1 is attached to the ceiling using bolts or the like. For example, as shown in Figure 2, a bolt 101 protruding from the ceiling is inserted through a bolt insertion hole 2d provided in the fixture body 2, and a washer and nut are attached to the bolt 101 to fix the fixture body 2 to the bolt 101. Note that in Figure 2, holes other than the bolt insertion hole 2d, slits, power terminal blocks, etc. are omitted from the illustration. In addition, depending on the construction site, the fixture body 2 may be attached using double nuts. The fixture body 2 requires bolt protrusion (bolt pull-in allowance into the fixture body 2), and it is desirable that the surrounding area does not interfere with the components that make up the lighting device 3.

[0021] Furthermore, components (power supply unit 400, function unit 600, etc.) located on the rear side of the frame 20 of the lighting device 3 protrude from the frame 20. Therefore, these components should be positioned so as not to interfere with (overlap with) the bolt insertion holes 2d, wiring insertion holes (holes through which wiring such as power lines and dimming signal lines pulled from the ceiling are inserted) and power terminal block provided in the fixture body 2. In particular, in fixture body 2 with a shallow recess 2a, components located on the rear side of the frame 20 should be positioned so as not to overlap with the bolt insertion holes 2d, wiring insertion holes, and power terminal block. Even in the case of fixture body with a deep recess (such as a fixture body for renewal) used in existing lighting fixtures equipped with fluorescent lamps, components located on the rear side of the frame 20 should be positioned so as not to overlap with the bolt insertion holes 2d, wiring insertion holes, and power terminal block. Furthermore, since there is a possibility that two power lines (VVF cables) (one for input and one for output) may be placed between the wiring insertion holes (especially the wiring insertion holes through which power lines are inserted) and the power terminal block, it is desirable to arrange the components (wiring such as power lines) provided on the rear side of the frame 20 so as not to overlap with the area between the wiring insertion holes and the power terminal block.

[0022] The fixture body 2 is made of metal and is formed into a long, flattened box shape in the Y-axis direction by bending or other processes applied to a metal plate. Specifically, when the fixture body 2 is installed on the ceiling, it is formed to have an inverted Fuji shape when viewed from the Y-axis direction.

[0023] As shown in Figure 2, the fixture body 2 is provided with a recess 2a having a rectangular opening. The recess 2a is provided in an elongated shape along the longitudinal direction of the fixture body 2. In other words, the top view shape (shape of the opening) of the recess 2a is rectangular with the Y-axis direction as the longitudinal direction.

[0024] As shown in Figures 2 and 3, the fixture body 2 has an opening edge 2a1. The opening edge 2a1 (first opening edge) is the fixture body side, which is the side portion in the short direction (X-axis direction) of the fixture body 2. The opening edge 2a1 (fixture body side) constitutes the edge of the opening surface of the recess 2a in the short direction (X-axis direction) of the fixture 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 with a planar surface, and constitutes the opening edge surface of the recess 2a.

[0025] The opening edge 2a1 is a part of the metal plate that makes up the main body 2 of the device, and is flat. For example, the top view shape of the opening edge 2a1 is an elongated rectangle with the Y-axis direction as its longitudinal 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 the Y-axis direction as its longitudinal direction.

[0026] The opening edges 2a1 are formed at each of the ends of the fixture body 2 in the short direction (X-axis direction). In other words, the opening edges 2a1 are formed on both sides of the opening surface of the recess 2a in the short direction (width direction). Therefore, in the X-axis direction, a pair of opening edges 2a1 sandwich the opening surface of the recess 2a.

[0027] Furthermore, as shown in Figures 1 and 2, the fixture body 2 has not only an opening edge 2a1 but also an opening edge 2a2 (second opening edge). The opening edge 2a2 is the end portion of the fixture body 2 in the longitudinal direction (Y-axis direction). The opening edge 2a2 constitutes the edge of the opening surface of the recess 2a in the longitudinal direction (Y-axis direction) of the fixture 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 with a planar surface and constitutes the opening edge surface of the recess 2a.

[0028] The opening edge 2a2, like the opening edge 2a1, is part of the metal plate that makes up the fixture body 2, and is flat. For example, the top view shape of the opening edge 2a2 is rectangular with the X-axis direction as its longitudinal 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 the Y-axis direction as its longitudinal direction.

[0029] The opening edges 2a2 are formed at each end of the fixture body 2 in the longitudinal direction (Y-axis direction). In other words, the opening edges 2a2 are formed on both sides in the longitudinal direction of the opening surface of the recess 2a. Therefore, in the Y-axis direction, a pair of opening edges 2a2 sandwich the opening surface of the recess 2a.

[0030] In this embodiment, the opening edge 2a1 on the side of the fixture body overlaps the X-axis end of the opening edge 2a2 at the end of the fixture body. Therefore, the surface of the opening edge 2a2 is recessed to the bottom of the recess 2a by the thickness of the opening edge 2a1 compared to the surface of the opening edge 2a1. In other words, the opening edge 2a2 is lower than the opening edge 2a1 by the thickness of the opening edge 2a1. As a result, a step equal to the thickness of the plate is formed at the boundary between the opening edge 2a1 and the opening edge 2a2. Note that the width of the opening edge 2a1 is narrower than the width of the opening edge 2a2, but is not limited to this.

[0031] The pair of opening edges 2a1 and the pair of opening edges 2a2 form a planar portion with a rectangular frame-like shape when viewed from above. The area enclosed by the pair of opening edges 2a1 and the pair of opening edges 2a2 forms the rectangular opening surface of the recess 2a.

[0032] Furthermore, the fixture body 2 has inclined surfaces 2b on each side of the recess 2a in the X-axis direction (width direction) of the fixture body 2. Each inclined surface 2b extends from the opening edge 2a1 (side of the fixture body) and has an inclined surface that slopes towards the ceiling as it extends outward. These inclined surfaces may also function as reflective surfaces.

[0033] The recess 2a of the fixture body 2 is the part to which the lighting device 3 is attached. Specifically, the recess 2a is a storage section in which the lighting device 3 is housed, and it extends over substantially the entire length of the fixture body 2, except for the opening edge 2a2 (end of the fixture body). As shown in Figure 3, in this embodiment, the recess 2a has a substantially U-shaped cross-section and has a pair of opposing side sections and a bottom section. The pair of side sections are a pair of side walls erected on the bottom section. Two slits are provided on one of the pair of side sections of the recess 2a.

[0034] 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 close 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, or the lighting device 3 attached to the recess 2a of the fixture body 2 can be removed from the recess 2a.

[0035] As will be described in detail later, the lighting device 3 and the fixture body 2 can be fixed together by hooking and locking the hook fitting 5 and elastic retaining 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 comprises a fitting base 5a fixed to the frame 20 and a fitting tip 5b that is attached to the fitting base 5a so as to be movable in the X-axis direction.

[0036] Furthermore, the means for attaching the lighting device 3 and the fixture body 2 are not limited to using a hook fitting 5 and an elastic retaining member 6 made of a kick spring. For example, the lighting device 3 and the fixture body 2 may be attached by other spring members such as a single torsion spring, a double torsion spring, or a leaf spring, or by attachment members other than spring members such as screws or latches. Also, the spring member such as a kick spring and the spring receiving 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 fitting on the lighting device 3, or the spring member may be provided on the lighting device 3 and the spring receiving fitting on the fixture body 2.

[0037] As shown in Figure 2, 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 unit 10 of the lighting device 3.

[0038] The power supply unit 400 is located on the rear side of the lighting device 3. Specifically, the power supply unit 400 is located in the recess 2a of the fixture body 2. In other words, 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 part of the lighting device 3 and is integrated with the lighting device 3. However, the power supply unit 400 may not be integrated with the lighting device 3, but may be located separately from the lighting device 3 in the fixture body 2. For example, the power supply unit 400 may be fixed to the fixture body 2.

[0039] AC power is supplied to the power supply unit 400 via a power terminal block to which power lines (such as VVF cables) are connected, which are inserted from above the ceiling through a through-hole (wiring insertion hole) in the fixture body 2 and pulled out into the recess 2a of the fixture body 2. Power lines such as VVF cables are construction wires and are an example of electrical wires. The power terminal block is installed in the recess 2a of the fixture body 2.

[0040] Furthermore, when connecting the power terminal block and the power unit 400 via a power line, one end of the power line connected to the power terminal block may be plugged into the socket of the power unit 400, or the connector on the other end of the power line connected to the power terminal block may be connected to the connector on the other end of the power line connected to the power unit 400, or the connector on the other end of the power line connected to the power unit 400 may be plugged into the socket of the power terminal block, or the power terminal block provided on the lighting device 3 and the power unit 400 may be connected with a power line and the VVF cable from the ceiling may be connected to the power terminal block, or the lead wires drawn out from the power unit 400 may be directly connected to the VVF cable from the ceiling.

[0041] Next, the detailed structure of the lighting device 3 will be described using Figures 4 to 7, with reference to Figures 1 to 3. Figure 4 is a perspective view of the lighting device 3 according to the embodiment, as seen from the ceiling. Figure 5 is an exploded perspective view of the lighting device 3. Figure 6 is an exploded perspective view of the main part of the lighting device 3 shown in Figure 5. Figure 7 is a partial cross-sectional view of the lighting device 3.

[0042] As shown in Figures 2, 4, and 5, the lighting device 3 is a long, linear light source called a light bar. The lighting device 3 emits light of a predetermined color, such as white light, as illumination light.

[0043] As shown in Figures 2, 5, and 6, the lighting device 3 comprises a light source unit 10, a frame 20 on which the light source unit 10 is arranged, a cover member 30 that covers the light source unit 10, and an end cap 40.

[0044] In this embodiment, the lighting device 3 also includes a power supply unit 400. In other words, the power supply unit 400 is provided on the lighting device 3. Specifically, the power supply unit 400 is attached to the ceiling-side surface of the frame 20.

[0045] The following describes in detail each component that makes up the lighting device 3.

[0046] 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 with a length approximately equal to the total length of the frame 20 in the longitudinal direction (Y-axis direction), or multiple units may be arranged along the longitudinal direction of the frame 20. As shown in Figure 5, in this embodiment, two light source units 10 are arranged along the longitudinal direction of the frame 20.

[0047] The light source unit 10 is an LED module using LEDs, and as shown in Figures 2 and 5, it comprises a substrate 11 and LEDs 12 arranged on the substrate 11.

[0048] 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 Figure 5, in this embodiment, the substrates 11 are arranged along the longitudinal direction of the frame 20.

[0049] The substrate 11 is, for example, a printed circuit board (PCB) on which metal wiring is formed in a predetermined pattern. A resist made of an insulating resin material may be formed on the surface of the substrate 11 to protect the wiring and ensure dielectric strength. The substrate 11 may be a single-sided PCB with wiring formed only on the main surface on which the LED 12 is mounted, or a double-sided PCB with wiring formed on both sides.

[0050] The substrates used to make up the substrate 11 include resin substrates made of insulating resin materials, ceramic substrates made of sintered bodies of ceramic materials such as alumina, and metal base substrates obtained by applying an insulating coating to the surface of a metal substrate made of a metal material such as aluminum or copper.

[0051] When the substrate 11 is made of a resin substrate, the resin substrate can be, for example, 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 or the like. Furthermore, the substrate 11 may be a rigid substrate or a flexible substrate in the form of a film.

[0052] The metal wiring formed on the circuit board 11 is electrically connected to the power supply unit 400. In this case, the electrodes or connector terminals formed on the circuit board 11 and the power supply unit 400 may be connected by wires such as lead wires. Alternatively, the wires connecting the circuit board 11 and the power supply unit 400 may be inserted, for example, through holes provided in the frame 20.

[0053] The substrate 11 is placed 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.

[0054] As shown in Figures 2 and 5, LEDs 12 are arranged on the substrate 11. Specifically, multiple LEDs 12 are arranged on the first surface of the substrate 11. In this embodiment, the multiple LEDs 12 are mounted in a straight line along the longitudinal direction (Y-axis direction) of the substrate 11 at predetermined intervals. Specifically, the multiple LEDs 12 are mounted along substantially the entire length of the substrate 11 in the longitudinal direction. Therefore, the multiple LEDs 12 are mounted along the longitudinal direction of the frame 20 and the cover member 30. Note that the multiple LEDs 12 may be mounted in multiple rows rather than a single row along the longitudinal direction of the substrate 11. The multiple LEDs 12 emit light when a DC current is supplied from the power supply unit 400 via a conductive member (for example, a pair of connecting pins) that connects the power supply unit 400 to the substrate 11.

[0055] LED12 is an example of a light-emitting element. In this embodiment, each of the multiple LEDs 12 is an individually packaged SMD structure LED element (LED light source). Therefore, the light source unit 10 is an SMD type LED module.

[0056] The SMD type LED 12 comprises a white container (package) made of resin or ceramic, an LED chip (bare chip) placed inside the container, and a sealing member 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 energized 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 member that fills the container.

[0057] The light source unit 10, configured in this way, is placed on the frame 20. Specifically, the substrate 11 of the light source unit 10 is placed on the frame 20.

[0058] The frame 20 is a long mounting member (base member) to which the light source unit 10 is attached. Specifically, the substrate 11 of the light source unit 10 is attached to the frame 20.

[0059] The frame 20, like the light source unit 10 and the fixture body 2, is formed in an elongated shape in the Y-axis direction. The light source unit 10 is supported by the frame 20. In other words, the frame 20 is a support member that supports the light source unit 10. In this embodiment, the frame 20 not only supports the light source unit 10 but also supports the cover member 30. Specifically, the substrate 11 on which the LEDs 12 are arranged is placed on the frame 20 and the substrate 11 is fixed to the frame 20, thereby supporting the substrate 11 on which the LEDs 12 are arranged by the frame 20.

[0060] The frame 20 is plate-shaped. In this embodiment, the frame 20 is made of metal and is composed of metal plates. The frame 20 is formed into a predetermined shape by, for example, roll forming and / or press forming on a single sheet of metal (metal plate) made of SPCC (Steel Plate Cold Commercial). The thickness of the metal plates constituting the frame 20 is, for example, 0.2 mm to 2 mm. In this embodiment, since the frame 20 is formed by sheet metal processing, the thickness of the metal plates constituting the frame 20 is preferably 1 mm or less. Specifically, the thickness of the metal plates constituting the frame 20 was set to 0.5 mm. Note that the method of manufacturing the frame 20 is not limited to roll forming and press forming, but may also be aluminum extrusion molding, etc.

[0061] As shown in Figure 3, the plate-shaped frame 20 has a main plate portion 21, a pair of vertical plate portions 22, a pair of horizontal plate portions 23, and a pair of side plate portions 24. As shown in Figure 4, the main plate portion 21, the pair of vertical 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 Figure 3, in this embodiment the frame 20 is formed symmetrically with respect to the center in the short direction of the frame 20 in the XZ cross section, but is not limited to this.

[0062] The main plate portion 21 is the main body portion of the frame 20. The main plate portion 21 is a flat, plate-like body with a constant thickness. As shown in Figure 2, the light source portion 10 is arranged on the main plate portion 21. Specifically, a substrate 11 on which LEDs 12 are arranged is placed on the main plate portion 21. In other words, the main plate portion 21 supports the substrate 11. In this embodiment, the substrate 11 and the main plate portion 21 are in contact. Note that the LEDs 12 of the light source portion 10 are arranged in the center of the main plate portion 21 in the width direction, but are not limited to this.

[0063] The main plate portion 21 has a first surface which is the surface facing the substrate 11 and a second surface which is facing away from the first surface. In this embodiment, the first surface of the main plate portion 21 is the substrate mounting surface to which the substrate 11 is attached. When the lighting fixture 1 is installed on the ceiling, the frame 20 is arranged such that the first and second surfaces of the main plate portion 21 are substantially parallel to the ceiling surface. In this case, the first surface of the main plate portion 21 is the surface facing the floor, and the second surface of the main plate portion 21 is the surface facing the ceiling.

[0064] As shown in Figure 3, the main plate portion 21 is located on the ceiling side (i.e., on the bottom side of the recess 2a) of the fixture body 2 than the opening surface of the recess 2a. In this embodiment, the LED 12 is also located on the bottom side of the recess 2a of the fixture body 2 than the opening surface of the recess 2a. Specifically, the main plate portion 21 and the LED 12 are located on the ceiling side of the opening edge 2a1 of the recess 2a. This increases the distance between the cover member 30 and the LED 12, thereby suppressing brightness unevenness (graininess) of the multiple LEDs 12 arranged in a straight line.

[0065] The pair of upright plates 22 are upright plates that are erected on the main plate 21. Specifically, the pair of upright plates 22 are erected from one end of the main plate 21, and the other upright plate 22 is erected from the other end of the main plate 21. The upright plates 22 and the horizontal plates 23 are provided between the main plate 21 and the side plates 24. Each of the pair of upright plates 22 is flat.

[0066] In this embodiment, each of the pair of vertical plate portions 22 has a main surface 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 vertical plate portions 22 are provided perpendicular to the main plate portion 21. Specifically, each of the pair of vertical plate portions 22 extends along the Z-axis direction. The vertical plate portions 22 may also be formed to be inclined with respect to the main plate portion 21.

[0067] As shown in Figures 3 and 6, the recess 20a is composed of a main plate portion 21 and a pair of vertical plate portions 22. The bottom of the recess 20a is the main plate portion 21. Therefore, the substrate 11 on which the LEDs 12 are mounted is placed at the bottom of the recess 20a (main plate portion 21). Thus, the frame 20 has a recess 20a on which the substrate 11 is placed. The sides of the recess 20a are the vertical plate portions 22. In this embodiment, the cross-sectional shape of the recess 20a is U-shaped. That is, the cross-sectional shape of the spatial area of ​​the recess 20a (the area enclosed by the main plate portion 21 and the pair of vertical plate portions 22) is rectangular.

[0068] Furthermore, 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 area of ​​the recess 20a does not have to be rectangular. For example, the cross-sectional shape of the spatial area 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 vertical plate portion 22 corresponds to the side of the trapezoidal recess 20a that is inclined relative to the main plate portion 21.

[0069] The light source unit 10, positioned at the bottom of the recess 20a, is housed within 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 housed within the recess 20a without protruding. In other words, the LED 12 is housed within the recess 20a. Therefore, the floor-side end (light-emitting surface) of the LED 12 of the light source unit 10 is located on the ceiling side of the opening surface of the recess 20a. In this case, the floor-side end of the LED 12 may be set back from the opening surface of the recess 20a, or it may be flush with the opening surface of the recess 20a. By housing the LED 12 within the recess 20a in this way, the distance between the LED 12 and the main part 31 of the cover member 30 can be increased, thereby suppressing brightness unevenness (graininess) caused by multiple LEDs 12 arranged spaced apart in the longitudinal direction of the frame 20.

[0070] In this 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 to this. For example, part 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 is preferably arranged so as not to protrude from the recess 20a, and the depth of the recess 20a is preferably greater than the thickness of the substrate 11 of the light source unit 10.

[0071] Furthermore, the frame 20 has a projection 20b that protrudes from the main plate portion 21 toward the light-emitting side of the light source portion 10. In other words, when the lighting fixture 1 is installed on the ceiling, the projection 20b of the frame 20 protrudes toward the floor.

[0072] The protrusions 20b are provided in pairs on both sides of the main plate portion 21 in the short direction of the frame 20. The formation of recesses 20a in the frame 20 creates a pair of protrusions 20b on the frame 20. In this embodiment, since the recesses 20a are formed to recess toward the ceiling, 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 vertical plate portion 22. By forming the protrusions 20b on the main plate portion 21 in this way, the strength of the frame 20 can be improved. The recesses 20a and the pair of protrusions 20b can be formed by deforming the metal plates constituting the frame 20 by press working or the like. Specifically, the recesses 20a and protrusions 20b are formed by bending the metal plates. Therefore, the plate thicknesses of the main plate portion 21, vertical plate portion 22, horizontal plate portion 23, and side plate portion 24 are the same.

[0073] The horizontal plate portion 23 is located to the side of the recess 20a. In this embodiment, the horizontal plate portion 23 is located on both sides of the recess 20a in the short direction of the frame 20. That is, a pair of horizontal plate portions 23 are formed so as to sandwich the recess 20a. Specifically, one of the pair of horizontal plate portions 23 is located on one side of the recess 20a in the short direction of the frame 20, and the other of the pair of horizontal plate portions 23 is located on the other side of the recess 20a in the short 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 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 direction of the frame 20. Each of the pair of horizontal plate portions 23 is connected to the floor-side end of the vertical plate portion 22 and extends outward from the floor-side end of the vertical plate portion 22.

[0074] Furthermore, when the first direction, which is the direction of light emission from the light source 10 (LED 12), is defined as the direction toward the floor, with the main plate portion 21 as the reference point, and the second direction, which is the direction opposite to the floor direction (first direction), is defined as the direction toward the ceiling (i.e., the building material side), with the main plate portion 21 as the reference point, at least a portion of each of the pair of horizontal plate portions 23 is located toward the floor (first direction side) than the main plate portion 21. In this embodiment, the entire horizontal plate portion 23 is located toward the floor than the main plate portion 21. Therefore, the pair of protruding portions 20b, each composed of a vertical plate portion 22 and a horizontal plate portion 23, are located toward the floor than the main plate portion 21. As a result, a spatial area is formed on the ceiling side of each protruding portion 20b. The spatial area is the area enclosed by the protruding portions 20b on the ceiling side of the frame 20. In other words, this spatial area is the area enclosed by the vertical plate portion 22 and the horizontal plate portion 23 on the ceiling side of the frame 20. In this embodiment, a side plate portion 24 is provided on the side of the horizontal plate portion 23 opposite the vertical plate portion 22. Therefore, this space is enclosed by the vertical plate portion 22, the horizontal plate portion 23, and the side plate portion 24, and is a concave recess that slopes downward towards the floor. As will be described in detail later, this space may house internal wiring, construction wiring (external wiring), structural members such as springs and screws, or functional components. In particular, since the side plate portion 24 exists as the outer wall of this space, it is difficult for the internal wiring housed in the space to protrude from the space. This prevents the internal wiring from protruding and causing wire entanglement.

[0075] Furthermore, this spatial area may house not just one internal wire, but multiple internal wires of the fixture. The one or more internal wires housed in this spatial area are fixed to the frame 20 by fixing members such as tape or metal fittings. In this case, it is preferable to use this spatial area to attach the tape or the metal fittings. For example, when fixing internal wires using metal fittings, the fittings are fixed to the spatial area so as to cover the spatial area where the internal wires are housed. In this case, it is preferable to position the fittings so as to be braced between the vertical plate portion 22 and the side plate portion 24.

[0076] Note that the internal wiring of the fixture does not necessarily have to be housed in this space. In this case, the internal wiring may be placed on the ceiling-side surface of the main plate portion 21 of the frame 20 and the internal wiring may be fixed in place with tape. However, if the tape is only attached to the main plate portion 21, the tape is likely to peel off. Therefore, in this case, it is advisable to use this space to attach the tape. For example, the internal wiring of the fixture may be placed on the ceiling-side surface of the main plate portion 21, and the tape may be applied so as to span both the main plate portion 21 and the vertical plate portion 22. This way, the tape is applied to two surfaces with different orientations, which helps to prevent the tape from peeling off.

[0077] As shown in Figure 7, each of the two side plate portions 24 is provided with a bendable portion 24a at its tip, which is formed to bend. The bendable portion 24a constitutes the tip of the side plate portion 24. In this embodiment, the bendable portion 24a is a folded portion formed by folding the tip of the side plate portion 24 in the thickness direction. Therefore, the bendable portion 24a is composed of a folded portion and a portion opposite the folded portion (an unfolded portion). The bendable portion 24a is, for example, a hemmed bend structure formed by hemming. However, the bendable portion 24a is not limited to one formed by hemming, but may also be a curled bend structure formed by curling and rolling up the tip of the side plate portion 24. Furthermore, although the bendable portion 24a is formed by folding inward in the width direction, it is not limited to this, and may also be formed by folding outward in the width direction. Also, the bendable portion 24a does not have to be formed on the side plate portion 24.

[0078] A mounting portion 33 for the cover member 30 is attached to each of the pair of side plate portions 24. In this embodiment, the cover member 30 is attached to the frame 20 by snap-in. Specifically, the cover member 30 can be fixed to the frame 20 by engaging a contact portion 33a provided on the mounting portion 33 of the cover member 30 with the bent portion 24a of the side plate portion 24 from the width direction of the cover member 30. Therefore, the bent portion 24a is a contact portion that abuts against the mounting portion 33.

[0079] The light source unit 10, supported by the frame 20, is covered by 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 positioned opposite the substrate 11 so as to cover 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.

[0080] The cover member 30 is an example of a light-transmitting cover, and transmits light emitted from the light source unit 10 (LED 12). In this embodiment, the cover member 30 is not only light-transmitting but also a diffuser cover. Therefore, the light from the LED 12 incident on the cover member 30 is diffused (scattered) by the cover member 30 and then transmitted through the cover member 30.

[0081] The cover member 30 further covers the frame 20 on which the light source unit 10 is located. In this embodiment, the cover member 30 covers the entire frame 20 on which the light source unit 10 is located. 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.

[0082] 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.

[0083] As shown in Figures 3 and 7, the cover member 30 has a main part 31 that covers the light source unit 10, an extension part 32 that extends inward from the cover member 30, and a mounting part 33 to which the frame 20 is attached.

[0084] As shown in Figure 3, a gap GX exists between the cover member 30 and the inner surface of the recess 2a of the fixture body 2. In this embodiment, this gap GX is the gap between the mounting portion 33 of the cover member 30 and the inner wall surface of the recess 2a.

[0085] The main body 31 is the main body of the cover member 30, and transmits the light emitted from the LED 12 of the light source unit 10 to the outside. The main body 31 covers the light source unit 10. In other words, the main body 31 faces the light source unit 10. Therefore, the main body 31 has a surface that faces the substrate 11 and the LED 12.

[0086] The main portion 31 constitutes the external appearance of the cover member 30. As shown in Figure 5, the main portion 31 is elongated in the Y-axis direction and formed in a trough shape. The main portion 31 is, for example, a flattened, substantially semi-cylindrical shape. Therefore, the main portion 31 has an elongated rectangular open 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 is a curved shape that is substantially curved in an arc shape. Note that the shape of the main portion 31 is not limited to a barrel-like R shape, but may also be a U-shape or other angular shape, or an angular shape with a part of the side constricted, or a cylindrical shape.

[0087] In this embodiment, when the cover member 30 is viewed from the longitudinal direction of the lighting device 3, the overall shape of the cover member 30 is D-shaped. Specifically, when viewed from the longitudinal direction of the lighting device 3, the overall shape of the main part 31 is D-shaped. Furthermore, as described above, the side shape of the lighting fixture 1, which consists of the lighting device 3 and the fixture body 2, is also D-shaped overall, making the boundary between the lighting device 3 and the fixture body 2 less noticeable. For this reason, as shown in Figure 3, when viewed from the Y-axis direction, the outer surface of the main part 31 of the cover member 30 and the outer surface (inclined surface) of the inclined surface 2b of the fixture body 2 are flush. In other words, the outer surface of the main part 31 and the outer surface of the inclined surface 2b are continuous, and there is no step or only a slight step at the boundary between the outer surface of the main part 31 and the outer surface of the inclined surface 2b.

[0088] The main portion 31 has an outer end portion 31a located outside the frame 20 in the short-side direction of the frame 20, beyond the protruding portion 20b of the frame 20. Specifically, the outer end portion 31a is the part of the main portion 31 that is located outside the mounting portion 33. The outer end portion 31a of the main portion 31 faces the opening edge 2a1 of the recess 2a of the fixture body 2. The opening edge 2a1 of the recess 2a is a flat surface parallel to the XY plane.

[0089] The extension portion 32 extends toward the light source portion 10. In this embodiment, the extension portion 32 is connected to the main portion 31 and extends toward the light source portion 10 from the main portion 31. Therefore, the extension portion 32 extends toward the inside of the cover member 30 from the main portion 31. Specifically, the extension portion 32 extends toward the light source portion 10 from the inner surface of the main portion 31. The extension portion 32 also extends toward the main plate portion 21 of the frame 20. In this embodiment, the extension portion 32 extends toward the main plate portion 21 from the main portion 31. Note that it is sufficient for a part of the extension portion 32 to extend toward the light source portion 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 Figures 5 and 6.

[0090] A pair of extensions 32 are provided. The pair of extensions 32 are provided on either side of the light source 10 in the short direction of the frame 20. Specifically, the pair of extensions 32 are provided at opposing positions in the X-axis direction. In this embodiment, the pair of extensions 32 are formed symmetrically on both sides in the XZ cross section with respect to the center of the cover member 30 in the short direction, but are not limited to this.

[0091] Each extension 32 covers at least a portion of the protruding portion 20b of the frame 20. In other words, each extension 32 extends toward the main plate portion 21, covering at least a portion of the protruding portion 20b. In this embodiment, each extension 32 covers the entire protruding portion 20b. Therefore, each extension 32 extends from the main portion 31 beyond the protruding portion 20b.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] Furthermore, each extension 32 extends from the inner surface of the main part 31 toward the LED 12 side. Each extension 32 extends toward the light source unit 10 side, covering the protruding portion 20b of the frame 20 on the inner surface of the main part 31, from a position toward the ceiling (second direction side) than the portion of the protruding portion 20b of the frame 20 that is located furthest toward the floor (first direction side). In this embodiment, the portion of the protruding portion 20b of the frame 20 that is located furthest toward the floor is the curved plate portion of the horizontal plate portion 23. In other words, each extension 32 extends toward the light source unit 10 side from a position toward the ceiling than the curved plate portion of each protruding portion 20b. Specifically, each extension 32 is connected to the tip of the outer end portion 31a of the main part 31. Therefore, in each extension portion 32, the outward extension portion 32a is connected to the tip of the outer end portion 31a of the main portion 31, and the outward extension portion 32a extends from the outer end portion 31a of the main portion 31 toward the light source portion 10.

[0096] In this way, the extension portion 32 extends toward the light source portion 10 from a position closer to the ceiling than the part of the horizontal plate portion 23 of the frame 20 that is closest to the floor, so as to cover the protruding portion 20b of the frame 20. As a result, a spatial area can be formed near the outer end portion 31a of the cover member 30 that extends toward the ceiling, beyond the protruding portion 20b of the frame 20. As a result, even if the frame 20 is provided with a protruding portion 20b that protrudes toward the floor, the light emitted from the LED 12 that does not pass through the main portion 31 of the cover member 30 but is reflected on the inner surface of the main portion 31 can be allowed to wrap around to the spatial area formed near the outer end portion 31a of the cover member 30. For this reason, the light emitted from the LED 12 can be sufficiently distributed to the outer end portion 31a of the main portion 31 of the cover member 30, so that the area near the outer end portion 31a of the main portion 31 of the cover member 30 can be sufficiently illuminated. Therefore, the cover member 30 can be illuminated over its entire width (X-axis direction), and the darkness at the widthwise ends of the cover member 30 can be suppressed. In other words, the darkness at the widthwise ends of the cover member 30 caused by the protrusion 20b of the frame 20 can be reduced.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] In each extension 32, the outer extension 32a is the part that connects the inner extension 32b and the main part 31. Therefore, one end of the outer extension 32a is connected to the inner extension 32b, and the other end of the outer extension 32a is connected to the inner surface of the main part 31.

[0101] The extended portion 32a is a contact portion that can abut against the open edge 2a1 of the recess 2a of the fixture body 2. When the lighting device 3 is housed in the recess 2a of the fixture body 2, the extended portion 32a may or may not abut against the open edge 2a1. In other words, there may be a gap between the extended portion 32a and the open edge 2a1, or the extended portion 32a and the open edge 2a1 may be in contact. More specifically, in this embodiment, as shown in Figure 7, the extended portion 32a has a projection 34c that protrudes toward the open edge 2a1, and the projection 34c is designed to abut against the open edge 2a1. This prevents surface contact between the extended portion 32a and the open edge 2a1 and prevents the generation of abnormal noise. Furthermore, foreign objects such as insects are prevented from entering the recess 2a of the device body 2 through the gap between the extended portion 32a and the open edge 2a1. In this embodiment, the projection 34c is a rib extending in the longitudinal direction (Y-axis direction) of the open edge 2a1. However, multiple projections 34c may be arranged along this longitudinal direction. In other words, each of the multiple projections 34c may be recognized as a point-like portion rather than a rib. This may also apply to projections 34a and 34b (see Figure 7).

[0102] In this embodiment, when the lighting device 3 is lifted up by the elastic holding member 6 (kick spring) and attached to the fixture body 2, the lighting device 3 is attached to the fixture body 2 by the extension portion 32a coming into contact with the open edge 2a1 of the fixture body 2. For this reason, it is desirable that the extension portion 32a and the projection 34c of the open edge 2a1 are in contact. However, due to warping, twisting, or humming of various parts such as the frame 20 or cover member 30, or variations during the installation of the lighting fixture 1 (distortion from bolt tightening, variations due to wiring, etc.), a gap may occur between the projection 34c of the extension portion 32a and the open edge 2a1.

[0103] The external extension portion 32a may be part of the main portion 31. In this case, the extension portion 32 consists only of the internal extension portion 32b.

[0104] At least a portion of the extension 32 has a shape that follows a portion of the frame 20. In this embodiment, at least a portion of the extension 32 has a shape that follows a projection 20b of the frame 20. Specifically, as described above, the inner extension 32b of the extension 32 has a shape that follows a projection 20b of the frame 20. Specifically, the inner extension 32b has a shape that follows an inclined plate portion of the projection 20b of the frame 20.

[0105] As shown in Figure 3, the internally extended portion 32b is bent so as to protrude toward the floor. In other words, the internally extended portion 32b is formed to have a protrusion that protrudes toward the floor, similar to the protrusion 20b of the frame 20. The protrusion 20b of the frame 20 protrudes toward the bent portion (protruding portion) of the internally extended portion 32b. Therefore, the protrusion 20b of the frame 20 is formed to fit into the protruding portion of the internally extended portion 32b.

[0106] Furthermore, at least a portion of the internally extended portion 32b may come into contact with the frame 20. As will be described later, in this embodiment, the tip of the internally extended portion 32b is in contact with the main plate portion 21 of the frame 20. In principle, the cover member 30 is in contact with the frame 20 at only two points: the tip of the internally extended portion 32b and the tip of the mounting portion 33 (contact portion 33a). Therefore, a gap exists between the internally extended portion 32b and the protruding portion 20b of the frame 20. However, depending on variations in parts or construction, the internally extended portion 32b and a portion of the protruding portion 20b may come into contact. It is also possible to intentionally bring the internally extended portion 32b and the protruding portion 20b into contact.

[0107] The tip of each extension 32 on the light source 10 side is located closer to the center of the frame 20 than the protruding portion 20b of the frame 20. Specifically, the tip of the inner extension 32b of the extension 32 is located to the side of the protruding portion 20b.

[0108] A spatial region S1 exists between each extension 32 and the frame 20. Specifically, a spatial region S1 exists between the inner extension 32b of each extension 32 and the main plate portion 21 of the frame 20. The spatial region S1 may house screw feet or screw heads when various parts are screwed in, or crimped portions when the frame 20 is crimped to other metal parts. In this embodiment, the head of a fastening member for fixing the power supply unit 400 and the frame 20 is housed in this spatial region S1. This prevents, for example, the shadow formed when light emitted from the light source 10 is blocked by the head of the fastening member from being visible from outside the cover member 30. In this embodiment, the fastening member is a screw comprising a head and a screw shaft. It is preferable that the tip of the screw shaft of the fastening member has a chamfered shape, such as a rounded tip. This prevents damage to the wiring positioned in the second direction (ceiling side) of the main plate portion 21 of the frame 20 by the tip of the screw shaft. In this embodiment, the head of the fastening member used to fix the functional unit 600 and the frame 20 is also positioned in the spatial region S1. The fastening member that fixes the power supply unit 400 and / or the functional unit 600 to the frame 20 may be a rivet.

[0109] The mounting portion 33 of the cover member 30 extends to the side opposite to the light-emitting 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.

[0110] Furthermore, even if foreign objects such as insects enter the spatial region S1, the distance between the spatial region S1 and the main part 31 is long, so shadows are less likely to be cast by the foreign objects present in the spatial region S1. Also, although the gap region between the inclined plate portion of the frame 20 and the internally extended portion 32b is close to the main part 31 and therefore prone to casting shadows if insects are present in this gap region, this gap region is small, so insects are less likely to accumulate there. Moreover, even if insects do enter this gap region, since insects have propulsion capabilities, they will move from this gap region towards the spatial region S1, meaning that the insects will enter the spatial region S1 where shadows are less likely to be cast. In addition, since the entrance to the spatial region S1 (exit of the gap region) is narrow, once an insect enters the spatial region S1, it will not be able to leave the spatial region S1. In other words, insects can be kept in the spatial region S1 where shadows are less likely to be cast. However, this does not apply if the extended portion 32 is made of an opaque material such as white resin.

[0111] In this embodiment, a pair of mounting portions 33 are provided so as to sandwich the frame 20. The pair of mounting portions 33 are formed as a pair of legs (feet) on the cover member 30. The length of the pair of mounting portions 33 in the Z-axis direction is the same. As shown in Figures 5 and 6, each of the pair of mounting portions 33 is formed in an elongated shape along the Y-axis direction. The lengths of the pair of mounting portions 33 in the Y-axis direction are also the same.

[0112] When the cover member 30 is attached to the frame 20, each of the pair of mounting portions 33 is elastically deformed. The orientation of each mounting portion 33 relative to each side plate portion 24 is different before the cover member 30 is attached to the frame 20 and after the cover member 30 is attached to the frame 20.

[0113] As shown in Figures 6 and 7, 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.

[0114] 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.

[0115] 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.

[0116] In this embodiment, the cover member 30 is attached to the frame 20 by snapping the mounting portion 33 of the cover member 30 into the side plate portion 24 of the frame 20 from the width direction of the cover member 30, as described above. However, this is not the only method. For example, the cover member 30 may be attached to the frame 20 by inserting the cover member 30 from the longitudinal end of the frame 20 and sliding the cover member 30 into place.

[0117] Furthermore, in this embodiment, the contact portion 33a formed at the tip of the mounting portion 33 is bent in an inclined shape, but is not limited to this. The contact portion 33a may also be formed so that its tip is folded back. In this case, the contact portion 33a is a recess with a substantially U-shaped cross-section.

[0118] The cover member 30 is made of a translucent resin material such as acrylic or polycarbonate, or a translucent material such as glass. 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 in which a light diffusing material is dispersed inside. Such a cover member 30 can be manufactured by resin molding a translucent resin material mixed with a light diffusing material into a predetermined shape. As the light diffusing material, light-reflective fine particles such as silica particles can be used.

[0119] Furthermore, the cover member 30 may be constructed 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 the light-diffusing material inside. Alternatively, the cover member 30 may be configured to have light-diffusing properties by applying a diffusion process rather than using a light-diffusing material. For example, the cover member 30 may be configured to have light-diffusing properties by forming minute irregularities on the surface of the transparent cover by applying a surface treatment such as texturing, or by printing a dot pattern on the surface of the transparent cover. Even when the cover member 30 is subjected to a diffusion process, it may contain an additional light-diffusing material to further enhance its light-diffusing properties.

[0120] In this embodiment, the main portion 31, extension portion 32, and mounting portion 33 constituting the cover member 30 are integrally formed. Therefore, the main portion 31, extension portion 32, and mounting portion 33 are made of the same material. Although the main portion 31, extension portion 32, and mounting portion 33 all have the same material strength, this is not limited to this. For example, the material strengths of the main portion 31, extension portion 32, and mounting portion 33 may be different. In this case, it is preferable that the material strength of the main portion 31 is greater than that of the extension portion 32 and the mounting portion 33. This configuration suppresses deformation of the main portion 31. In other words, the shape of the main portion 31 is stabilized. This reduces the impact on optical performance due to deformation of the cover member 30.

[0121] Furthermore, the thickness of the main part 31, the extension part 32, and the mounting part 33 is not particularly limited, but for example, it is 0.5 mm or more and 5 mm or less. As an example, the thickness of the main part 31 may be 1 mm or less. Note that the main part 31, the extension part 32, and the mounting part 33 are all the same thickness, but are not limited to this. For example, the thicknesses of the main part 31, the extension part 32, and the mounting part 33 may be different. In this case, the thickness of the main part 31 should be greater than the thickness of the extension part 32 and the mounting part 33. This configuration suppresses deformation of the main part 31. In other words, the shape of the main part 31 is stabilized. This reduces the impact on optical performance due to deformation of the cover member 30.

[0122] Furthermore, in this embodiment, the main part 31, the extension part 32, and the mounting part 33 were made of the same resin material, but this is not limited to this. The main part 31, the extension part 32, and the mounting part 33 may be made of two or more different materials. In this case, the main part 31 and the extension part 32 can be made of different resin materials. For example, the main part 31 may be made of a translucent resin material, and part or all of the extension part 32 may be made of a white or milky white resin material. Also, the mounting part 33 is made of the same resin material as the main part 31 or the extension part 32. Specifically, the main part 31, the mounting part 33, the outer extension part 32a and part of the inner extension part 32b of the extension part 32 may be made of a translucent resin material, and part of the inner extension part 32b of the extension part 32 may be made of a white or milky white resin material. In this way, by making part or all of the extension portion 32 white or milky white, the extension portion 32 (for example, the inner extension portion 32b) can be given a reflective function. As a result, the light that reaches the extension portion 32 from the light emitted from the LED 12 can be reflected by the inner extension portion 32b and incident on 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 installing multiple lighting fixtures 1, the number of lighting fixtures 1 to be installed can be reduced. In addition, by making the mounting portion 33 white or milky white, the leakage of light into the inside of the fixture body 2 can be reduced. The cover member 30, which is partially composed of a white or milky white resin material in this way, can be formed by two-color molding. The extension portion 32 may also be molded in two layers of two colors. For example, the base layer of the extension portion 32 may be composed of the same translucent resin material as the main portion 31, and the surface layer of the extension portion 32 (the layer laminated on the base layer) may be composed of a white or milky white resin material.

[0123] The cover member 30 has both ends in the longitudinal direction closed. In this embodiment, both ends in the longitudinal direction of the cover member 30 are closed by end caps 40. Specifically, the cover member 30 and the frame 20 are fixed together to form a long cylindrical body, and end caps 40 are attached to each of the ends in the longitudinal direction of this cylindrical body. A space region S2 is formed between the cover member 30 and the frame 20. This space region S2 is a region (insect-proof region) configured to prevent foreign matter such as insects and dust from entering, and is a region surrounded by the main part 31 of the cover member 30 and the main plate part 21 of the frame 20. Specifically, the space region S2 is a region closed by the main part 31 and extension part 32 of the cover member 30, the main plate part 21 of the frame 20 and the end caps 40. The light source unit 10 is located in this space region S2.

[0124] The end cap 40 is a component that prevents foreign matter such as dust and insects from entering the inside of the cylindrical body, which is composed of the cover member 30 and the frame 20. The end cap 40 is provided to seal the open end of the cylindrical body, which is composed of the frame 20 and the cover member 30. In other words, the end cap 40 is attached to the cylindrical body so as to cover the open end of the cylindrical body, which is composed of 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 inside of the cylindrical body, which is composed of the frame 20 and the cover member 30. In other words, it prevents foreign matter such as dust and insects from entering the spatial region S2. The frame 20 has multiple through holes formed by cutting and bending claws, etc., and through holes for light sources, etc., but each of these multiple through holes is sealed by a membrane member, for example, a single-sided adhesive sheet (insect-proof tape). This prevents foreign matter such as dust and insects from entering the spatial region S2 through these multiple through holes.

[0125] The end caps 40 are cover ends provided at the longitudinal ends of the cover member 30. The end caps 40 are provided at each of the longitudinal ends of the cover member 30. The end caps 40 are directly or indirectly connected to the longitudinal ends of the cover member 30. An elastic member 50 is attached to the end caps 40 (see Figures 3 and 6). This elastic member 50 is an elastic body made of resin material or the like, and is elastically deformable. In this embodiment, the elastic member 50 is made of elastomer. Even if dimensional variations occur in the cover member 30, frame 20, and end caps 40, or if warping, undulation, twisting, etc. occur, creating gaps between the cover member 30, frame 20, and end caps 40, these gaps can be filled by the elastic member 50.

[0126] As shown in Figure 5, the end cap 40 provided at one end of the cover member 30 in the longitudinal direction is the first end cap 40a, and the end cap 40 provided at the other end of the cover member 30 in the longitudinal direction is the second end cap 40b. In this embodiment, the first end cap 40a and the second end cap 40b are the same part. That is, the shape of the second end cap 40b is the same as the shape of the first end cap 40a. This reduces costs. 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.

[0127] As shown in Figure 3, a spatial area S3 is formed on the ceiling side of the frame 20. In other words, a spatial area S3 exists between the fixture body 2 and the frame 20. The spatial area S3 is part or all of the recess 2a of the fixture body 2. The power supply unit 400, the functional unit 600, etc. are arranged in this spatial area S3.

[0128] [Detailed configuration of end cap 40] Here, the configuration of the end cap 40 in the lighting device 3 according to this embodiment will be described in more detail with reference to Figures 1 to 7 and Figures 8 to 14. Figure 8 is a diagram showing how the adhesive or solvent 80 applied to the fitting portion 42 of the end cap 40 flows along the fitting portion 42. Figures 9 and 10 are front views of the end cap 40 as seen from the inner surface 41a side. Figures 11 to 13 are partially enlarged cross-sectional views showing modified examples of the end cap 40. Figure 14 is a partially enlarged perspective view showing modified examples of the end cap 40.

[0129] As shown in Figures 6 to 10, the end cap 40 has a main portion 41, a fitting portion 42 for fitting the cover member 30, and a protruding portion 43 that extends inward from the main portion 41.

[0130] The main body 41 is the cap body that forms the main body of the end cap 40, and primarily functions to cover the open end of the cylindrical body composed of the cover member 30 and the frame 20. In this embodiment, all or part of the plate-shaped main body 41 is translucent. As a result of the main body 41 being translucent, light from the light source unit 10 can be transmitted through it. In other words, the light emitted from the LED 12 of the light source unit 10 passes through the main body 41 and is taken out to the outside of the end cap 40.

[0131] Specifically, the end cap 40 is translucent throughout. Therefore, both the main part 41 and the fitting part 42 are translucent. The translucent end cap 40 may be transparent or diffusive. By using a translucent and diffusive end cap 40, the light from the LED 12 incident on the end cap 40 is diffused (scattered) by the end cap 40 and then transmitted through the end cap 40.

[0132] The end cap 40 is made of a translucent resin material such as acrylic or polycarbonate, or a translucent material such as glass. In this embodiment, the end cap 40 is made of a translucent resin material. In this case, the end cap 40 can be a diffusion member in which a light diffusing material is dispersed inside. Such an end cap 40 can be manufactured by resin molding a translucent resin material mixed with a light diffusing material into a predetermined shape. As the light diffusing material, light-reflective fine particles such as silica particles can be used.

[0133] Furthermore, the light-transmitting and diffusing end cap 40 may be constructed not by dispersing a light-diffusing material inside, but by forming a milky white light-diffusing film containing a light-diffusing material on the surface (inner or outer surface) of the transparent end cap. Alternatively, the end cap 40 may be configured to have light-diffusing properties by applying a diffusion process instead of using a light-diffusing material. For example, the end cap 40 may be configured to have light-diffusing properties by forming minute irregularities on the surface of the transparent end cap by applying a surface treatment such as texturing, or by printing a dot pattern on the surface of the transparent end cap. Even when the end cap 40 is subjected to a diffusion process, it may contain an additional light-diffusing material to further enhance its light-diffusing properties.

[0134] The end cap 40 may be made of the same material as the cover member 30, or it may be made of a different material than the cover member 30.

[0135] Furthermore, the main part 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 opaque end cap 40 may be one that has light-shielding (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. Also, the end cap 40 may have a light-transmitting portion and an opaque portion.

[0136] The front view shape of the main part 41 is, for example, a flattened, semi-circular shape (D-shape) overall. Therefore, the outer shape of one side of the main part 41 in the Z-axis direction is a curved shape that curves in an arc to conform to the shape of the cover member 30. The thickness of the plate-shaped main part 41 is constant. For example, the thickness of the main part 41 is 1 mm to 5 mm, but is not limited to this. Furthermore, the thickness of the main part 41 is assumed to be constant throughout its entire area, but is not limited to this.

[0137] Furthermore, the front view shape of the main part 41 is, for example, a flattened semicircle overall. Therefore, the outer shape of one side of the main part 41 in the Z-axis direction is a curved shape that curves in an arc to conform to the shape of the cover member 30. In this embodiment, when viewed from the longitudinal direction of the lighting device 3, the end cap 40 is D-shaped overall. Specifically, when viewed from the longitudinal direction of the lighting device 3, the main part 41 is D-shaped overall. Also, as described above, the side shape of the lighting fixture 1, which consists of the lighting device 3 and the fixture body 2, is also D-shaped overall, and the boundary between the lighting device 3 and the fixture body 2 is not noticeable.

[0138] The main part 41 has an inner surface 41a and an outer surface as surfaces in the thickness direction of the main part 41. The inner surface 41a is the surface on the light source unit 10 side (LED 12 side), and the outer surface is the surface on the opposite side from the light source unit 10 side (LED 12 side). The outer surface is an exposed surface that can be seen by the user. As described above, in this embodiment, the entire main part 41 is translucent, so the light emitted from the LED 12 and incident on the main part 41 passes through the entire main part 41. Therefore, the inner surface 41a of the main part 41 becomes the light incident surface on which the light from the LED 12 is incident, and the outer surface of the main part 41 becomes the light emission surface on which the light from the LED 12 is emitted to the outside.

[0139] The main portion 41 is curved in a concave shape as a whole, so as to be recessed inward. For example, the inner surface 41a and the outer surface of the main portion 41 are parabolic in shape. That is, the inner surface 41a and the outer surface are curved in the X-axis direction and the Z-axis direction, respectively. Furthermore, in this embodiment, the main portion 41 is generally inclined such that in the height direction (Z-axis direction), the upper portion (ceiling side portion) is recessed inward from the lower portion (floor side portion), and in the width direction (X-axis direction), the central portion is recessed inward from the surrounding portion, thus having a generally curved shape.

[0140] The main portion 31 of the cover member 30 is attached to the inner surface 41a of the main portion 41. Therefore, the inner surface 41a of the main portion 41 includes a mounting surface 41c, which is the surface to which the cover member 30 is attached. In this embodiment, the mounting surface 41c is the surface to which the main portion 31 of the cover member 30 is attached. Specifically, the longitudinal end of the main portion 31 of the cover member 30 is attached to the mounting surface 41c. Therefore, the end face of the longitudinal end of the main portion 31 of the cover member 30 abuts against the mounting surface 41c. The mounting surface 41c and the longitudinal end of the main portion 31 of the cover member 30 are fixed together with adhesive. Therefore, adhesive may be interposed between the mounting surface 41c and the end face of the longitudinal end of the main portion 31 of the cover member 30. Thus, the mounting surface 41c is a connecting surface to which the longitudinal end of the main portion 31 of the cover member 30 is directly or indirectly connected. Furthermore, the mounting surface 41c includes not only the surface to which the longitudinal end of the main portion 31 of the cover member 30 abuts, but also the same plane as the surface to which the longitudinal end of the main portion 31 of the cover member 30 abuts.

[0141] The fitting portion 42 is a structure for fitting the longitudinal end of the main portion 31 of the cover member 30. The fitting portion 42 is provided on the main portion 41. Specifically, the fitting portion 42 is provided on the floor-side end of the main portion 41. The fitting portion 42 is a protruding portion that protrudes from the inner surface 41a of the main portion 41. The fitting portion 42 is provided on the floor-side end (opposite side from the fixture body 2 side) of the main portion 41. Specifically, the fitting portion 42 is formed on the curved portion of the outer circumference of the main portion 41. In other words, the fitting portion 42 is formed on the portion of the cover member 30 corresponding to the main portion 31. In this embodiment, the fitting portion 42 is a convex wall portion erected on the inner surface 41a of the main portion 41, and is formed to extend in a curved shape according to the shape of the edge of the curved portion of the main portion 41. The fitting portion 42 is formed integrally with the main portion 41.

[0142] In the curved portion of the outer circumference of the main portion 41, the area between the fitting portion 42 and the edge of the main portion 41 becomes the mounting surface 41c. In other words, the mounting surface 41c includes the region between the fitting portion 42 and the outer peripheral edge of the main portion 41. The longitudinal end of the main portion 31 of the cover member 30 is fitted into the fitting portion 42 by abutting against the wall surface of the fitting portion 42 and the mounting surface 41c.

[0143] Note that the longitudinal end of the main portion 31 of the cover member 30 and the fitting portion 42 do not necessarily have to be in contact. For example, a ring-shaped packing member may be placed between the fitting portion 42 and the longitudinal end of the main portion 31 of the cover member 30 so as to surround the fitting portion 42. In this case, the packing member is inserted between the outer peripheral end of the inner surface 41a of the main portion 41 of the end cap 40 and the end face of the longitudinal end of the main portion 31 of the cover member 30.

[0144] The fitting portion 42 has a first continuous portion 42a and a second continuous portion 42c which are formed continuously along the shape of the outer peripheral edge of the curved portion of the main portion 41, and a non-continuous portion 42b which is not formed continuously along the shape of the outer peripheral edge of the curved portion of the main portion 41.

[0145] The first continuous section 42a is located on the top side of the curved portion of the end cap 40, and the second continuous section 42c is located on the base side of the curved portion of the end cap 40. In other words, the second continuous section 42c is located on the end end 46 side, which is the outermost end of the end cap 40. The length of the first continuous section 42a is longer than the length of the second continuous section 42c.

[0146] The discontinuous portion 42b is located between the first continuous portion 42a and the second continuous portion 42c. In this embodiment, the discontinuous portion 42b is connected to the first continuous portion 42a and the second continuous portion 42c. The discontinuous portion 42b has a shape in which a part of the fitting portion 42 is recessed in a direction away from the outer peripheral edge of the main portion (towards the main plate portion 21). Specifically, the discontinuous portion 42b is recessed so as to bend in an L-shape.

[0147] The height of the protrusions constituting the discontinuous section 42b and the height of the protrusions constituting the first continuous section 42a may be the same, or they may be different. For example, the height of the protrusions constituting the discontinuous section 42b may be lower than the height of the protrusions constituting the first continuous section 42a.

[0148] Furthermore, a recess 41c1 is formed in the mounting surface 41c adjacent to the second continuous portion 42c. The recess 41c1 is located on the floor side of the second continuous portion 42c. The recess 41c1 is a bottomed hole in which a part of the mounting surface 41c is recessed. In this embodiment, the recess 41c1 is formed in an elongated shape along the shape of the outer peripheral edge of the main portion 41.

[0149] In this embodiment, the recess 41c1 is composed of a first recess 41d1 and a second recess 41d2 that is continuous with the end of the first recess 41d1. It is desirable that the first recess 41d1 have a deeper groove depth so that it can hold more adhesive or solvent. For example, the depth of the first recess 41d1 is 0.5 mm. On the other hand, it is desirable that the second recess 41d2 have a shallower groove depth because it is a place where foreign matter such as insects and dust can enter the inside of the lighting device 3. For example, the depth of the second recess 41d2 is 0.2 mm.

[0150] Furthermore, in this embodiment, a rib 42d is formed in the discontinuous section 42b as a wall portion for retaining the adhesive or solvent 80 (see Figure 8) that has flowed through. In addition, in this embodiment, an inclined portion 41e is formed between the discontinuous section 42b and the second continuous section 42c to guide the adhesive or solvent 80 that has flowed beyond the discontinuous section 42b into the recess 41c1.

[0151] In this embodiment, the end cap 40 further has an extension portion 42e extending from the inner surface 41a of the main portion 41, which is the cap body, toward the cover member 30. In this embodiment, the extension portion 42e is formed by a second continuous portion 42c, and this extension portion 42e includes a first extension portion 42e1 formed along the inner surface of the cover member 30, and a second extension portion 42e2 that is continuous with the first extension portion 42e1 and formed in the non-fixed region P2. The second extension portion 42e2 is provided so as to be spaced apart from the inner surface of the cover member 30. In order to prevent the inner surface of the cover member 30 from being fixed to the second extension portion 42e2, it is desirable to increase the slope of the second extension portion 42e2 toward the ceiling side to avoid surface contact between the inner surface of the cover member 30 and the second extension portion 42e2.

[0152] The protruding portion 43 is a protruding portion that extends from the inner surface 41a of the main portion 41 (cap body). The protruding portion 43 protrudes inward in the longitudinal direction (Y-axis direction) of the cover member 30.

[0153] The protruding portion 43 is composed of a plurality of protruding pieces. In this embodiment, the end cap 40 has a first protruding piece 43a, a second protruding piece 43b, a third protruding piece 43c, and a fourth protruding piece 43d as the protruding portion 43. The protruding portion 43 is formed integrally with the main portion 41. Specifically, the first protruding piece 43a, the second protruding piece 43b, the third protruding piece 43c, and the fourth protruding piece 43d are all formed integrally with the main portion 41.

[0154] The first protruding piece 43a is a main plate-facing protruding piece that faces the main plate portion 21 of the frame 20. Specifically, when the lighting device 3 is attached to the fixture body 2 installed on the ceiling, the first protruding piece 43a faces the main plate portion 21 of the frame 20 in the vertical direction (Z-axis direction). Furthermore, the first protruding piece 43a extends along the main surface of the main plate portion 21. Specifically, the first protruding piece 43a extends linearly along the width direction (X-axis direction) of the main plate portion 21. Note that there is a gap between the first protruding piece 43a and the main plate portion 21.

[0155] Furthermore, the first protruding piece 43a is provided at the ceiling-side (appliance body 2 side) end of the main part 41. Specifically, the first protruding piece 43a is provided on the straight portion of the outer circumference of the main part 41.

[0156] The first protruding piece 43a, which overlaps with the main plate portion 21 in the Z-axis direction, functions as an overlap allowance between the end cap 40 and the frame 20. In other words, when the lighting device 3 is turned on, the end cap 40, which is fixed to the end of the cover member 30, moves in the Y-axis direction due to the difference in thermal expansion between the frame 20 and the cover member 30. However, by providing the first protruding piece 43a on the end cap 40 that overlaps with the main plate portion 21 of the frame 20, the difference in thermal expansion between the frame 20 and the cover member 30 can be absorbed. In other words, even if the cover member 30 and the frame 20 expand due to thermal expansion when the lighting device 3 is turned on, the end cap 40 and the frame 20 will maintain an overlapping state in the Z-axis direction. Furthermore, by providing the first protruding piece 43a, even if the frame 20 shifts from its predetermined position and moves to one side, the end cap 40 and the frame 20 will still overlap in the Z-axis direction. This prevents a gap from forming between the end cap 40 and the frame 20 in the Z-axis direction, thus preventing foreign matter such as insects and dust from entering through that gap.

[0157] Furthermore, considering that the cover member 30 and end cap 40 expand due to heat when the lighting device 3 is turned on, it is desirable that there be a gap between the first protruding piece 43a and the substrate 11 of the light source unit 10. However, if this gap is too large, there is a risk that foreign matter such as insects and dust may enter the space S2 between the cover member 30 and the frame 20, so it is desirable that this gap be as small as possible. In addition, even if the cover member 30 expands due to heat and the cover member 30 and the frame 20 are pushed to one side, it is desirable that the first protruding piece 43a and the main plate portion 21 overlap. This prevents foreign matter such as insects and dust from entering. Furthermore, even if the cover member 30 expands due to heat, it is desirable that the main portion 31 of the cover member 30 and the main portion 41 of the end cap 40 do not press against each other.

[0158] The second protruding piece 43b is an extension-facing protruding piece that faces the extension portion 32 of the cover member 30. Specifically, when the lighting device 3 is attached to the fixture body 2 installed on the ceiling, the second protruding piece 43b faces the extension portion 32 in the horizontal direction. In this embodiment, at least a portion of the second protruding piece 43b faces a portion of the extension portion 32 in the X-axis direction. A gap exists between the second protruding piece 43b and the extension portion 32. Furthermore, the second protruding piece 43b extends in a direction intersecting the main surface of the main plate portion 21. Specifically, the second protruding piece 43b extends linearly in the Z-axis direction.

[0159] In this embodiment, the second protruding piece 43b is connected to the first protruding piece 43a. Specifically, the second protruding piece 43b extends from each of the longitudinal ends of the first protruding piece 43a in a direction away from the main plate portion 21. The length of the second protruding piece 43b is shorter than the length of the first protruding piece 43a.

[0160] The third protruding piece 43c faces the main plate portion 21 of the frame 20. Specifically, when the lighting device 3 is attached to the fixture body 2 installed on the ceiling, the third protruding piece 43c faces the main plate portion 21 of the frame 20 in the vertical direction (Z-axis direction).

[0161] Furthermore, the third protruding piece 43c is not only a main plate portion opposing protruding piece that faces the main plate portion 21 of the frame 20, but also an extension portion opposing protruding piece that faces the extension portion 32 of the cover member 30 in the vertical direction. Specifically, the third protruding piece 43c is located between the main plate portion 21 and the extension portion 32. The third protruding piece 43c is inserted into the space region S1 between the main plate portion 21 and the extension portion 32. This prevents foreign matter such as insects and dust from entering the space region S2 between the cover member 30 and the frame 20. Note that the third protruding piece 43c does not contact the main plate portion 21 and the extension portion 32, but is not limited to this. The third protruding piece 43c may be in contact with the main plate portion 21, the protruding portion 20b, or the extension portion 32. This can enhance the insect-repellent effect.

[0162] The third protruding piece 43c, like the first protruding piece 43a, is provided at the ceiling-side (appliance body 2 side) end of the main part 41. Specifically, the third protruding piece 43c is provided on the straight portion of the outer circumference of the end cap 40 (main part 41).

[0163] Furthermore, the third protruding piece 43c is provided on the outside of the first protruding piece 43a in the X-axis direction. In other words, the third protruding piece 43c and the first protruding piece 43a are side by side. However, in this embodiment, the ceiling-side end face of the third protruding piece 43c is located closer to the ceiling than the ceiling-side end face of the first protruding piece 43a. Specifically, the third protruding piece 43c is provided on the main part 41 such that a portion of the ceiling-side portion of the main part 41 protrudes from the edge of the end of the fixture body 2 side (ceiling side) of the main part 41. Also, the length of the third protruding piece 43c in the X-axis direction is shorter than the length of the first protruding piece 43a in the X-axis direction.

[0164] In this embodiment, the third protruding piece 43c is provided on both sides of the first protruding piece 43a. In other words, the main part 41 is provided with two third protruding pieces 43c. The first protruding piece 43a is sandwiched between the two third protruding pieces 43c. A gap exists between the third protruding piece 43c and the first protruding piece 43a. A part of the extended portion 32 of the cover member 30 is inserted into this gap.

[0165] The fourth protruding piece 43d is an extension-facing protruding piece that faces the extension portion 32 of the cover member 30. Specifically, when the lighting device 3 is attached to the fixture body 2 installed on the ceiling, the fourth protruding piece 43d faces the extension portion 32 in the vertical direction (Z-axis direction). Specifically, the fourth protruding piece 43d faces a part (inclined plate portion) of the extension portion 32. In this embodiment, the fourth protruding piece 43d extends so as to be inclined along the inclined plate portion of the extension portion 32. The extension portion 32 of the cover member 30 is sandwiched between the third protruding piece 43c and the fourth protruding piece 43d.

[0166] The fourth protruding piece 43d is positioned to be able to contact the extended portion 32. Specifically, there is a gap between the fourth protruding piece 43d and the extended portion 32, and the fourth protruding piece 43d does not contact the extended portion 32. However, when the extended portion 32 bends or deforms, the fourth protruding piece 43d may come into contact with the extended portion 32. This allows the fourth protruding piece 43d to hold the extended portion 32 of the cover member 30 or to suppress deformation of the extended portion 32. The wall portion constituting the first continuous portion 42a, the second continuous portion 42c, and the discontinuous portion 42b of the fitting portion 42 may also be configured as the fourth protruding piece 43d to hold the extended portion 32 or to suppress deformation of the extended portion 32.

[0167] In this embodiment, the fourth protruding piece 43d is connected to the second protruding piece 43b and is continuous with the second protruding piece 43b. Specifically, the fourth protruding piece 43d is connected to the end of the second protruding piece 43b and extends from the end of the second protruding piece 43b. The length of the fourth protruding piece 43d is shorter than the length of the first protruding piece 43a. The length of the fourth protruding piece 43d is approximately the same as the length of the second protruding piece 43b, but is not limited to this. In other words, the length of the fourth protruding piece 43d may be shorter or longer than the length of the second protruding piece 43b.

[0168] Furthermore, the fourth protruding piece 43d is not connected to the fitting portion 42 and is discontinuous with the fitting portion 42. Therefore, a gap exists between the fourth protruding piece 43d and the fitting portion 42.

[0169] The heights (amount of protrusion in the Y-axis direction) of the first protruding piece 43a, the second protruding piece 43b, the third protruding piece 43c, and the fourth protruding piece 43d may all be the same, they may all be different, or some may have the same height. For example, among the first protruding piece 43a, the second protruding piece 43b, the third protruding piece 43c, and the fourth protruding piece 43d, only the first protruding piece 43a may be taller, or only the first protruding piece 43a and the second protruding piece 43b may be taller, or only the first protruding piece 43a, the second protruding piece 43b, and the third protruding piece 43c may be taller (that is, only the fourth protruding piece 43d may be shorter).

[0170] Furthermore, the first protruding piece 43a, the second protruding piece 43b, the third protruding piece 43c, and the fourth protruding piece 43d may protrude from the mounting surface 41c, or, depending on the shape of the main part 41, they may protrude from a position offset from the mounting surface 41c. In this case, the first protruding piece 43a, the second protruding piece 43b, the third protruding piece 43c, and the fourth protruding piece 43d may protrude from a position outside the mounting surface 41c in the Y-axis direction, or from a position inside the mounting surface 41c. Note that the first protruding piece 43a, the second protruding piece 43b, the third protruding piece 43c, and the fourth protruding piece 43d may protrude from different positions in the Y-axis direction.

[0171] Furthermore, the first protruding piece 43a, the second protruding piece 43b, the third protruding piece 43c, and the fourth protruding piece 43d protrude parallel to the Y-axis direction, but are not limited to this. For example, the second protruding piece 43b, the third protruding piece 43c, and the fourth protruding piece 43d may be inclined.

[0172] As described above, the fitting portion 42 and the protruding portion 43 are formed integrally with the main portion 41. In this case, the main portion 41, the fitting portion 42, and the protruding portion 43 may be made of two or more types of resin materials. An end cap 40 with partially different resin materials can be formed by two-color molding.

[0173] Furthermore, a recessed portion 45 is formed at the ceiling-side (fixture body 2 side) end of the end cap 40. The recessed portion 45 is a bottomed hole in which a part of the inner surface of the end cap 40 is recessed. In this embodiment, the recessed portion 45 is formed by cutting out a straight portion that is the edge of the ceiling-side end of the main portion 41 so as to create a step. In addition, the recessed portion 45 is formed so as to recede a part of the inner surface 41a of the main portion 41 in the thickness direction of the main portion 41.

[0174] The recessed portion 45 is formed near the end end 46, which is the outermost end of the end cap 40. Furthermore, the recessed portion 45 is formed in a position corresponding to the protruding portion 20b of the frame 20. Therefore, a pair of recessed portions 45 are provided, corresponding to the pair of protruding portions 20b. Specifically, the pair of recessed portions 45 are positioned symmetrically. As will be described in detail later, each of the pair of protruding portions 20b of the frame 20 is fitted into each of the recessed portions 45. Therefore, the size of the recessed portion 45 in plan view is large enough to accommodate the protruding portions 20b.

[0175] The end cap 40, configured in this way, is fixed to the cover member 30. The end cap 40 and the cover member 30 may be fixed together with an adhesive or by ultrasonic welding. Alternatively, the end cap 40 and the cover member 30 may be provided with locking structures such as claws or recesses to join them together.

[0176] The end cap 40 and the cover member 30 may be fixed together with an adhesive or by ultrasonic welding. Alternatively, the end cap 40 and the cover member 30 may be joined together by providing a locking structure such as a claw or a recess on the end cap 40 and the cover member 30.

[0177] Next, the fixing portion between the main portion 31 of the cover member 30 and the end cap 40 will be described. As shown in Figure 7, the fitting portion 42 of the end cap 40 into which the main portion 31 of the cover member 30 is fitted has a first continuous portion 42a and a second continuous portion 42c, and a discontinuous portion 42b located between the first continuous portion 42a and the second continuous portion 42c. Therefore, as shown in Figure 7, the joint portion between the main portion 31 of the cover member 30 and the end cap 40 has a fixing region P1 (region indicated by length A) into which the main portion 31 and the end cap 40 are fixed, and a non-fixing region P2 (region indicated by length B) into which the main portion 31 and the end cap 40 are not fixed. This point will be explained using Figure 8. Figure 8 shows how the adhesive or solvent 80 applied to the fitting portion 42 of the end cap 40 flows along the outer wall surface of the fitting portion 42.

[0178] In this embodiment, the joint between the main part 31 of the cover member 30 and the end cap 40 has a fixing region P1 that is fixed to the cover member 30 at the contact surface (mounting surface 41c) and a non-fixing region P2 that is provided at the end of the end cap 40 in the direction corresponding to the short direction (width direction) of the cover member 30. This non-fixing region P2 has a non-contact region R1 that is provided in the longitudinal direction of the cover member 30, away from the longitudinal end of the cover member 30 (see Figure 10). On the other hand, the non-fixing region P2 has a contact region R2 that contacts the longitudinal end of the cover member 30, and this contact region R2 is provided along the non-contact region R1 (see Figure 10). In this embodiment, the non-contact region R1 is formed by the recess 41c1, and the area without the recess 41c1 is the contact region R2.

[0179] Furthermore, in this embodiment, as shown in Figure 7, it is desirable that the non-fixed area P2 is located outward in the shorter direction (outward in the width direction) than the contact area P3 (the area indicated by length C) where the frame 20 and the end cap 40 come into contact. This is because if the fixed area P1 is narrowed, the distance between the surface on which impact is applied from the frame 20 and the fixed surface increases, which may weaken the impact resistance of the end cap 40.

[0180] The adhesive or solvent 80 applied to the fitting portion 42 of the end cap 40 flows along the outer wall surface of the fitting portion 42 as shown by the dashed arrow in Figure 8. At this time, since a discontinuous portion 42b is formed in the fitting portion 42 where a part of the fitting portion 42 is recessed, it is possible to suppress the flow of the adhesive or solvent 80 applied to the first continuous portion 42a of the fitting portion 42 to the mounting surface 41c and the second continuous portion 42c on the end end 46 side (downstream side) rather than the discontinuous portion 42b.

[0181] Specifically, any adhesive or solvent 80a applied to the first continuous section 42a that reaches the discontinuous section 42b will travel along the recessed wall surface of the discontinuous section 42b and remain there. This prevents the adhesive or solvent 80a applied to the first continuous section 42a from reaching the mounting surface 41c and the second continuous section 42c on the end end 46 side of the discontinuous section 42b.

[0182] Furthermore, in this embodiment, a recess 41c1 is provided at a position closer to the floor than the second continuous section 42c. As a result, the adhesive or solvent 80b applied to the first continuous section 42a that flows from the discontinuous section 42b toward the mounting surface 41c is drawn from the inclined section 41e into the recess 41c1 and remains in the recess 41c1. Even if the adhesive or solvent 80b exceeds the discontinuous section 42b, it can be drawn into the recess 41c1. In this way, the recess 41c1 prevents the adhesive or solvent 80b from exceeding the recess 41c1 and reaching the mounting surface 41c.

[0183] Thus, according to the structure of the fitting portion 42 of the end cap 40 in this embodiment, the adhesive or solvent 80 applied to the first continuous portion 42a of the fitting portion 42 can be interrupted and separated at the discontinuous portion 42b. As a result, it is possible to suppress the flow of the adhesive or solvent 80 to the mounting surface 41c and the second continuous portion 42c on the end end 46 side (downstream side) from the discontinuous portion 42b. Specifically, it is possible to suppress the adhesive or solvent 80 from reaching the second continuous portion 42c.

[0184] As a result, when the main part 31 of the cover member 30 and the end cap 40 are joined together and fixed with an adhesive or solvent, the main part 31 and the end cap 40 are fixed together in the portion corresponding to the first continuous portion 42a of the fitting portion 42, but the main part 31 and the end cap 40 are not fixed together in the portions corresponding to the discontinuous portion 42b and the second continuous portion 42c of the fitting portion 42. In other words, the first continuous portion 42a of the fitting portion 42 and the main part 31 are fixed together, but the discontinuous portion 42b and the second continuous portion 42c of the fitting portion 42 and the main part 31 are not fixed together. As a result, as shown in Figure 7, the joint between the main portion 31 of the cover member 30 and the end cap 40 forms a fixed region P1 where the main portion 31 and the first continuous portion 42a of the fitting portion 42 are fixed, and a non-fixed region P2 where the main portion 31 and the non-continuous portion 42b and the second continuous portion 42c are not fixed. The non-fixed region P2 is preferably located outside the outer end of the fixed region P1 in the width direction (X-axis direction) of the end cap 40.

[0185] Furthermore, from the viewpoint of forming a fixed area P1 and a non-fixed area P2, the fitting portion 42 only needs to be provided with a first continuous portion 42a and a non-continuous portion 42b. In other words, it is not necessarily required that a second continuous portion 42c be provided in the fitting portion. However, by providing the second continuous portion 42c, the main portion 31 of the cover member 30 can be supported by the second continuous portion 42c, thereby stabilizing the shape of the cover member 30 and preventing the cover member 30 from shifting in the width direction, thus enabling the positioning of the cover member 30. In addition, the second continuous portion 42c can also support the extended portion 32 of the cover member 30, preventing the extended portion 32 from cracking. Moreover, when the mounting portion 33 of the cover member 30 opens excessively, the extended portion 32 comes into contact with the second continuous portion 42c, preventing the cover member 30 from coming off the frame 20.

[0186] As described above, in the lighting device 3 of this embodiment, at the joint between the main portion 31 of the cover member 30 and the end cap 40, there is a fixed region P1 where the main portion 31 and the end cap 40 are fixed together, and a non-fixed region P2 where the main portion 31 and the end cap 40 are not fixed together. As a result, the main portion 31 of the cover member 30 is movable in the non-fixed region P2. Specifically, the main portion 31 corresponding to the discontinuous portion 42b and the second continuous portion 42c of the fitting portion 42, which constitute the non-fixed region P2, is movable. Moreover, the non-fixed region P2 prevents the adhesive or solvent 80 applied to the end cap 40 from spreading to the portion facing the extended portion 32 of the cover member 30. Therefore, not only can a part of the main portion 31 be moved in the width direction, but the extended portion 32 can also be moved in the width direction.

[0187] Therefore, when attaching the cover member 30 to which the end cap 40 according to this embodiment is fixed to the frame 20, a part of the main portion 31 and the extension portion 32 move in the width direction, so as shown by the dashed line in Figure 7, not only the mounting portion 33 but also a part of the main portion 31 and the extension portion 32 can be bent outward together.

[0188] This reduces the amount of deformation of the mounting portion 33 itself, thereby preventing the cover member 30 from cracking or deforming. Furthermore, when fitting the cover member 30 onto the frame 20, the range of motion of the mounting portion 33 can be increased by moving not only the mounting portion 33 but also a part of the main portion 31 and the extension portion 32 together. This makes it easier to attach the cover member 30 to the frame 20, improving ease of assembly.

[0189] Furthermore, as shown in the modified lighting device 3A in Figure 11, the groove depth of the recess 41c1 may be constant in the extending direction (longitudinal direction). In the non-fixed region P2 of this end cap 40A, there is no contact surface (contact region R2) between the end face of the cover member 30 and the end face of the end cap 40A.

[0190] As shown in the modified lighting device 3B in Figure 12, the recess 41c1 may be located slightly towards the floor. In the non-fixed area P2 of this end cap 40B, insect-repellent properties can be improved by leaving a small contact surface (contact area R2) between the end face of the cover member 30 and the end face of the end cap 40B.

[0191] As shown in the modified lighting device 3C in Figure 13, the recess 41c1 may be located on the inside of the cover member 30 in the short direction. In the non-fixed region P2 of this end cap 40C, the outer end 31a of the main portion 31 and the end end 46 leave a contact surface (contact region R2) between the end face of the cover member 30 and the end face of the end cap 40C. It is desirable from the viewpoint of insect resistance that the extension portion 42e (second extension portion 42e2) extends further toward the end of the end cap 40 than the non-contact region R1.

[0192] Furthermore, as shown in the modified lighting device 3D in Figure 14, an inlet 47 for adhesive or solvent may be formed in the first continuous portion 42a to control the fixing region P1.

[0193] [Detailed configuration of the hook fitting 5 and elastic retaining member 6] Here, the configuration of the hook fitting 5 and the elastic retaining member 6 in the lighting device 3 according to this embodiment will be described in more detail with reference to Figures 15 to 20. Figure 15 is a perspective view of the main part of the lighting device 3 as seen from the ceiling. Figure 16 is a perspective view of the fitting base 5a of the hook fitting 5. Figure 17 is a perspective view of the main part of the frame 20 to which the hook fitting 5 and the elastic retaining member 6 are attached, as seen from the floor. Figure 18 is a cross-sectional view showing the part for positioning the elastic retaining member 6. Figures 19 and 20 show modified examples of the part for positioning the elastic retaining member 6.

[0194] 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 the hook fitting 5 and elastic retaining member 6 shown in Figures 2, 5, and 19. The hook fitting 5 and elastic retaining member 6 are fixed to the frame 20.

[0195] As shown in Figure 15, the hook fitting 5 is positioned on the ceiling side of the frame 20. The hook fitting 5 is a sheet metal plate member. The hook fitting 5 is fixed to the end of the frame 20. For example, the hook fitting 5 is fixed to the frame 20 by fixing members such as screws and extends outward from the frame 20. The hook fitting 5 is hooked onto the fixture body 2. In this embodiment, a slit is provided on the inner wall surface of the recess 2a of the fixture body 2, and the hook fitting 5 is hooked into this slit.

[0196] The elastic retaining member 6 is a component for attaching the lighting device 3 to the fixture body 2. In this embodiment, the elastic retaining 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 retaining member 6. The elastic retaining member 6 is attached to the ceiling side (back) of the main plate portion 21 of the frame 20. Specifically, the elastic retaining member 6 is fixed to the end of the frame 20 in the width direction. In this embodiment, the elastic retaining member 6 is fixed to the frame 20 on the side opposite to the hook fitting 5 in the width direction. In this case, the elastic retaining member 6 is fixed to the frame 20 by a fixing member such as a screw. Specifically, the elastic retaining member 6 is fixed to a retaining fitting 5c ​​(see Figures 15 and 16) which is fixed to the frame 20 by mounting screws. In this embodiment, a part of the fitting base 5a of the hook fitting 5 functions as the retaining fitting 5c. The elastic retaining member 6 is detachably attached to the fixture body 2. In this embodiment, the elastic retaining member 6 is detachably secured to a receiving bracket fixed to the main body of the device 2.

[0197] As shown in Figures 15 and 16, in this embodiment, a notch 5d is formed in the retaining fitting 5c ​​to prevent the elastic retaining member 6 (the coil spring portion of the kick spring) from falling off. In addition, a reinforcing piece may be formed in a location other than directly below the bolt 101 on the fitting base 5a, and if it does not interfere with the suspension bolt (bolt 101) of the fixture body 2, a reinforcing piece may be formed in a location directly below the bolt 101 on the fitting base 5a. Furthermore, as shown in Figure 16, the length of the bent piece 5e is shortened to prevent contact between the cover member 30 and the bent piece 5e.

[0198] As shown in Figures 17 and 18, in this embodiment, holes 20h and 5h are formed in the frame 20 and the metal fitting base 5a, respectively, into which the elastic retaining member 6 (the tip of the kick spring 6a) is inserted for positioning the elastic retaining member 6. These holes 20h and 5h may be sealed by a membrane member 29 (for example, a single-sided adhesive sheet such as insect-repellent tape) attached between the frame 20 and the metal fitting base 5a, and the elastic retaining member 6 (the tip of the kick spring 6a) may pierce through the sealed membrane member 29. This prevents foreign matter such as dust and insects from entering the inside of the lighting device 3 through these holes 20h and 5h. It is desirable from the viewpoint of insect resistance that the size of the hole 20h formed in the frame 20 be smaller than the size of the hole 5h formed in the metal fitting base 5a (see Figure 18).

[0199] As shown in Figure 2, the hook fittings 5 ​​and elastic retaining members 6 are provided in pairs at both ends of the frame 20 in the longitudinal direction, but are not limited to this arrangement. Also, the hook fittings 5 ​​and elastic retaining members 6 are provided at positions opposite each other in the short direction of the frame 20, but are not limited to this arrangement.

[0200] Furthermore, as shown in the modified lighting device 3E in Figure 19, a projection 20p, also called a dowel, may be formed on the frame 20 to prevent foreign matter such as dust and insects from entering the inside of the lighting device 3. Also, as shown in the modified lighting device 3F in Figure 20, a projection 5p, also called a dowel, may be formed on the metal base 5a to prevent foreign matter such as dust and insects from entering the inside of the lighting device 3.

[0201] [Other variations] The following describes lighting device 3 relating to other modified examples using Figures 21 to 26.

[0202] As shown in the modified lighting device 3G in Figures 21 and 22, the extension portion 42e of the end cap 40G may be provided with a recessed and convex structure 50a in which recesses and convex portions are arranged in the short direction of the cover member 30. The convex portions of this recessed and convex structure 50a seal the gap between the end cap 40G and the inner surface of the cover member 30, thereby improving insect-repellent properties.

[0203] As shown in the modified lighting device 3H in Figures 23 and 24, the extension portion 42e of the end cap 40H may be provided with a recessed and convex structure 50b in which recesses and convex portions are arranged in the longitudinal direction of the cover member 30. The convex portions of this recessed and convex structure 50b seal the gap between the end cap 40H and the inner surface of the cover member 30, thereby improving insect-repellent properties.

[0204] As shown in the modified lighting device 3I in Figure 25, instead of separating the extension portion 42e of the end cap 40I from the inner surface of the cover member 30I, the inner surface of the cover member 30I may be separated from the extension portion 42e of the end cap 40I by the molding shape of the cover member 30I. In this case, as shown in Figure 26, after fixing the end cap 40I and the cover member 30I, the cover member 30I may be assembled to the frame 20I and fixed to the frame 20I by bending the mounting portion 33 of the cover member 30I inward using a stepped screw 102 or a crimping structure. After the cover member 30I is assembled to the frame 20, the gap between the end cap 40I and the inner surface of the cover member 30I is sealed, thereby improving insect resistance.

[0205] (Note) Based on the above description of embodiments, the following technologies are disclosed.

[0206] (Technology 1) Light source unit, A long frame having a main plate portion to which the light source unit is attached, A long cover member that covers the light source section, The cover member comprises an end cap provided at the longitudinal end of the cover member, The end cap is, The cap body and A contact surface formed on the inner surface of the cap body and in contact with the longitudinal end of the cover member, The contact surface includes a fixing region that is fixed to the cover member, The end cap has a non-fixed region provided at the end of the cover member in a direction corresponding to the short side, The non-adhering region has a non-contact region provided in the longitudinal direction of the cover member, in a direction away from the end of the cover member in the longitudinal direction. Lighting device.

[0207] This configuration forms a fixed area P1 at the joint between the cover member 30 and the end cap 40, where the cover member 30 is fixed to the cover member 30 at the contact surface (mounting surface 41c), and a non-fixed area P2 at the short end of the end cap 40. This non-fixed area P2 has a non-contact area R1 in the longitudinal direction of the cover member 30, which is provided away from the longitudinal end of the cover member 30. Therefore, the joint between the cover member 30 and the end cap 40 forms a fixed area P1 where the main part 31 and the fitting part 42 are fixed, and a non-fixed area P2 where the main part 31 and the fitting part 42 are not fixed. As a result, when attaching the cover member 30 with the end cap 40 fixed to it to the frame 20, not only the mounting part 33 but also a part of the main part 31 and the extended part 32 can be bent outwards together (see Figure 7).

[0208] (Technical 2) The lighting device according to Technical 1, wherein the cover member has a main part that covers the light source part, an extension part that extends toward the light source part, and a mounting part to which the frame is attached.

[0209] With this configuration, when attaching the cover member 30 to which the end cap 40 is fixed to the frame 20, not only the mounting portion 33 but also a part of the main portion 31 and the extended portion 32 can be bent outwards together (see Figure 7).

[0210] (Technical 3) The lighting device according to Technical 1 or Technical 2, wherein the non-contact area is provided along the outer shape of the end cap.

[0211] This configuration creates a non-contact area R1 at the longitudinal end of the cover member 30, which follows the outer shape of the end cap 40. Therefore, when attaching the cover member 30 with the end cap 40 fixed to it to the frame 20, not only the mounting portion 33 but also a part of the main portion 31 and the extended portion 32 can be bent outwards together (see Figure 7).

[0212] (Technical 4) The lighting device according to any one of Technical 1 to 3, wherein the non-fixed area has a contact area that contacts the longitudinal end of the cover member.

[0213] With this configuration, a contact area R2 is formed at the longitudinal end of the cover member 30, which contacts the longitudinal end of the cover member 30. Therefore, in the non-adherent area P2 of the end cap 40, a contact surface (contact area R2) is formed between the end face of the cover member 30 and the end face of the end cap 40, thereby improving insect-repellent properties.

[0214] (Technical 5) The lighting device according to Technical 4, wherein the contact area is provided along the non-contact area.

[0215] With this configuration, a contact area R2 is formed at the longitudinal end of the cover member 30, extending along the non-contact area R1. Therefore, in the non-fixed area P2 of the end cap 40, the contact surface (contact area R2) between the end face of the cover member 30 and the end face of the end cap 40 is provided along the non-contact area R1, thereby improving insect-repellent properties.

[0216] (Technical 6) The end cap further has an extension that extends from the inner surface of the cap body toward the cover member, The extension portion is, A first extension formed along the inner surface of the cover member, It comprises a second extension portion that is continuous with the first extension portion and is formed in the non-adherent region, The second extension is provided so as to be spaced apart from the inner surface of the cover member. A lighting device described in any one of the technologies 1 through 5.

[0217] This configuration allows for a greater slope of the second extension portion 42e2 toward the ceiling, preventing surface contact between the inner surface of the cover member 30 and the second extension portion 42e2. Therefore, the second extension portion 42e2 is positioned at a distance from the inner surface of the cover member 30, thereby preventing it from being fixed to the inner surface of the cover member 30.

[0218] (Technology 7) A lighting device described in any one of Technology 1 to Technology 6, The fixture comprises a fixture body having a recess into which the aforementioned lighting device is attached, Lighting fixtures.

[0219] This configuration forms a fixed area P1 at the joint between the cover member 30 and the end cap 40, where the cover member 30 is fixed to the cover member 30 at the contact surface (mounting surface 41c), and a non-fixed area P2 at the short end of the end cap 40. This non-fixed area P2 has a non-contact area R1 in the longitudinal direction of the cover member 30, which is provided away from the longitudinal end of the cover member 30. Therefore, the joint between the cover member 30 and the end cap 40 forms a fixed area P1 where the main part 31 and the fitting part 42 are fixed, and a non-fixed area P2 where the main part 31 and the fitting part 42 are not fixed. As a result, when attaching the cover member 30 with the end cap 40 fixed to it to the frame 20, not only the mounting part 33 but also a part of the main part 31 and the extended part 32 can be bent outwards together (see Figure 7).

[0220] Although this embodiment has been described above, this embodiment is not limited to these, and various modifications are possible within the scope of the gist of this embodiment. [Explanation of Symbols]

[0221] 1 Lighting fixtures 2. Main body of the device 2a Recess 3,3A,3B,3C,3D,3E,3F,3G,3H,3I Lighting equipment 10 Light source section 20,20I Frame 21 Main plate part 30,30I Cover Member 31 Main part 32 Extension section 33 Mounting part 40, 40A, 40B, 40C, 40G, 40H, 40I End Caps 41a Inside surface 42e Extension 42e1 1st extension part 42e2 2nd extension P1 fixed area P2 Non-stick area R1 non-contact area R2 contact area

Claims

1. Light source section, A long frame having a main plate portion to which the light source unit is attached, A long cover member that covers the light source section, The cover member comprises an end cap provided at the longitudinal end of the cover member, The end cap mentioned above is The cap body and A contact surface formed on the inner surface of the cap body and in contact with the longitudinal end of the cover member, The contact surface includes a fixing region that is fixed to the cover member, The end cap has a non-fixed region provided at the end of the cover member in a direction corresponding to the short side, The non-adhering region has a non-contact region provided in the longitudinal direction of the cover member, in a direction away from the end of the cover member in the longitudinal direction. Lighting device.

2. The lighting device according to claim 1, wherein the cover member has a main portion that covers the light source portion, an extension portion that extends toward the light source portion, and a mounting portion to which the frame is attached.

3. The lighting device according to claim 1, wherein the non-contact area is provided along the outer shape of the end cap.

4. The lighting device according to claim 3, wherein the non-fixed region has a contact region that contacts the longitudinal end of the cover member.

5. The lighting device according to claim 4, wherein the contact area is provided along the non-contact area.

6. The end cap further has an extension that extends from the inner surface of the cap body toward the cover member, The extension portion is, A first extension formed along the inner surface of the cover member, It comprises a second extension portion that is continuous with the first extension portion and is formed in the non-adherent region, The second extension is provided so as to be spaced apart from the inner surface of the cover member. The lighting device according to claim 1.

7. A lighting device according to any one of claims 1 to 6, The fixture comprises a fixture body having a recess into which the aforementioned lighting device is attached, Lighting fixtures.

Images