LED lighting device and LED lighting fixture

Abstract

To provide an LED lighting device etc. which can inhibit a frame from being removed from an end cap or a cover member.SOLUTION: An LED lighting device 3 comprises: a light source part 10; a long frame 20 having a main plate part 21 to which the light source part 10 is attached; a long cover member 30 covering the light source part 10; and end caps 40 each provided at an end in a longitudinal direction of the cover member 30. When a direction of light emission of the light source part 10 with reference to the main plate part 21 is referred to as a first direction, the frame 20 has protruding parts 20b protruding from the main plate part 21 in the first direction. The end cap 40 has recessed parts 45 each of which at least partially overlaps with the protruding part 20b when viewed in the longitudinal direction.SELECTED DRAWING: Figure 19

Description

[Technical field]

[0001] The present invention relates to an LED lighting device and an LED lighting fixture equipped with the LED lighting device. [Background technology]

[0002] There is known an LED lighting fixture that uses LEDs (Light Emitting Diodes). For example, as an LED lighting fixture to be installed on a ceiling, there is known an LED lighting fixture that includes a long LED lighting device called a light bar and a long fixture body having a recess in which the LED lighting device can be detachably attached (Patent Document 1).

[0003] The LED lighting device in the LED lighting fixture disclosed in Patent Document 1 includes a light source unit consisting of an LED, a long, light-transmitting cover member that covers the light source unit, a long frame that supports the light source unit and to which the cover member is attached, and a pair of end caps that close both longitudinal ends of the cover member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-103248 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the LED lighting device disclosed in Patent Document 1, the frame and the end caps are structured such that the longitudinal end of the frame is fitted into the fitting of the end cap. In other words, the frame and the end cap are fitted together only by the plate thickness of the frame. Therefore, if there is dimensional variation in the frame, end cap, cover member, etc., the longitudinal end of the frame may ride up onto the fitting of the end cap.

[0006] In addition, since the cover member and the frame are long, they are prone to warping, undulation, twisting, etc. In particular, if the frame is made of a plate material, the frame is prone to warping, etc. When warping, etc. occurs in the cover member or the frame, the longitudinal end of the frame may ride up the fitting portion of the end cap.

[0007] Alternatively, the longitudinal end of the frame may ride up over the fitting of the end cap due to a difference in thermal expansion caused by a difference in the thermal expansion coefficients of the frame, end cap, and cover member. Furthermore, the longitudinal end of the frame may ride up over the fitting of the end cap when handling the LED lighting device during installation or when the package falls during transportation of the LED lighting device.

[0008] In this way, if the longitudinal end of the frame rides up onto the fitting portion of the end cap, the frame may come off the end cap or the cover member. In particular, if the frame is made of a plate material, the frame is easily deformed by the impact of a fall, etc., and if the frame and the end cap are fitted together only by the plate thickness of the frame, the frame may come off the end cap or the cover member.

[0009] The present invention has been made in consideration of such problems, and aims to provide an LED lighting device etc. that can prevent the frame from coming off the end cap or cover member. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, one embodiment of an LED lighting device according to the present invention comprises a light source unit, a long frame having a main board to which the light source unit is attached, a long cover member covering the light source unit, and an end cap provided at a longitudinal end of the cover member, wherein when the direction of the light emission side of the light source unit is defined as a first direction with respect to the main board, the frame has a protrusion protruding from the main board toward the first direction, and the end cap has a recessed portion whose at least a portion overlaps with the protrusion when viewed from the longitudinal direction.

[0011] Moreover, one aspect of an LED lighting fixture according to the present invention includes the above LED lighting device and a fixture body having a recess in which the LED lighting device is attached. Effect of the Invention

[0012] This can prevent the frame from coming off the end cap or the cover member. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of an LED lighting device according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the LED lighting device according to the embodiment. [Diagram 3] FIG. 3 is a cross-sectional view of an LED lighting device according to an embodiment. [Figure 4] FIG. 4 is a cross-sectional view of an LED lighting device according to an embodiment. [Diagram 5] FIG. 5 is a partial cross-sectional view of an LED lighting device according to an embodiment. [Figure 6] FIG. 6 is a perspective view of the LED lighting device according to the embodiment as viewed from the cover member side. [Figure 7] FIG. 7 is a perspective view of the LED lighting device according to the embodiment as viewed from the back side. [Figure 8] FIG. 8 is a cross-sectional perspective view of an LED lighting device according to an embodiment. [Figure 9]FIG. 9 is an exploded perspective view of the LED lighting device according to the embodiment. [Figure 10] FIG. 10 is a perspective view of an end portion in the longitudinal direction of the LED lighting device according to the embodiment. [Figure 11] FIG. 11 is an enlarged view of an end portion in the longitudinal direction of the LED lighting device according to the embodiment. [Figure 12] FIG. 12 is a diagram for explaining a method for mounting an LED lighting device to a fixture body in an LED lighting fixture according to an embodiment. [Figure 13] FIG. 13 is a diagram for explaining a state in which the cover member is attached to the frame in the manufacturing method of the LED lighting device according to the embodiment. [Figure 14] FIG. 14 is a diagram for explaining a state in which a cover member is attached to a frame in a manufacturing method for an LED lighting device according to another embodiment. [Figure 15] FIG. 15 is a half cross-sectional view of an LED lighting device according to another embodiment. [Figure 16] FIG. 16 is a perspective view of the end cap according to the embodiment as viewed from the outer surface side. [Figure 17] FIG. 17 is a perspective view of the end cap according to the embodiment as viewed from the inner surface side. [Figure 18] FIG. 18 is a cross-sectional view of an LED lighting device according to an embodiment. [Figure 19] FIG. 19 is an enlarged view of an area IXX enclosed by a dashed line in FIG. [Figure 20] FIG. 20 is an exploded perspective view of the portion shown in FIG. [Figure 21] FIG. 21 is a diagram for explaining a method for fastening the end cap and the cover member. [Figure 22] FIG. 22 is a diagram showing how the adhesive applied to the fitting portion of the end cap flows along the outer wall surface of the fitting portion. [Diagram 23] FIG. 23 is a diagram showing the configuration of an end cap of a comparative example. [Figure 24]FIG. 24 is a diagram showing how the cover member is attached to the frame when the end cap of the comparative example is used and when the end cap of the present embodiment is used. [Diagram 25] FIG. 25 is a diagram showing the configuration of an LED lighting device equipped with a cover member according to another embodiment. [Figure 26] FIG. 26 is a diagram showing variations in the position of the discontinuous portion of the fitting portion of the end cap. [Figure 27] FIG. 27 is a diagram showing the position of an adhesive for fixing the cover member and the end cap in the LED lighting device according to the embodiment. [Figure 28] FIG. 28 is a diagram showing another example of the position of the adhesive for fixing the cover member and the end cap in the LED lighting device according to the embodiment. [Figure 29] FIG. 29 shows modified examples of the position of the adhesive for fixing the cover member and the end cap. [Diagram 30] FIG. 30 shows another modification of the position of the adhesive for fastening the cover member and the end cap. [Diagram 31] FIG. 31 is a diagram showing the configuration of an end cap provided with a welding rib. [Diagram 32] FIG. 32 is a diagram showing the position of the welding rib (linear rib) on the end cap. [Diagram 33] FIG. 33 is a diagram showing another example of the position of the welding rib (linear rib) on the end cap. [Diagram 34] FIG. 34 is a diagram showing the positions of the welding ribs (point ribs) on the end cap. [Diagram 35] FIG. 35 is a diagram showing another example of the position of the welding rib (point rib) on the end cap. [Diagram 36] FIG. 36 is a perspective view of the LED lighting device according to the embodiment when cut along a plane passing through the recessed portion of the end cap. [Figure 37]FIG. 37 is a side view of the LED lighting device according to the embodiment when cut along a plane passing through the recessed portion of the end cap. [Figure 38] FIG. 38 is a diagram showing a state in which the cover member to which the end caps are attached is combined with the frame. [Figure 39] FIG. 39 is a cross-sectional view of an LED lighting device having an end cap according to another embodiment, taken along a plane passing through a recess in the end cap. [Diagram 40] FIG. 40 is a diagram showing a state in which a cover member and a frame of another embodiment are combined. [Diagram 41] FIG. 41 is a half cross-sectional view of the LED lighting device according to the first modification. [Diagram 42] FIG. 42 is a half cross-sectional view of an LED lighting device according to the second modification. [Diagram 43] FIG. 43 is a half sectional view of an LED lighting device according to another aspect of the modified example 2. In FIG. [Diagram 44] FIG. 44 is a half sectional view of an LED lighting device according to still another aspect of the second modification. [Diagram 45] FIG. 45 is a diagram showing variations in the shape of the third projecting piece of the end cap. [Figure 46] FIG. 46 is a diagram showing another variation in the shape of the third projecting piece of the end cap. [Figure 47] FIG. 47 is a half cross-sectional view of an LED lighting device according to the third modification. [Figure 48] FIG. 48 is a half cross-sectional view of an LED lighting device according to the fourth modification. [Figure 49] FIG. 49 is an enlarged view of an outer end portion of an LED lighting device in an LED lighting fixture according to an embodiment. [Figure 50] FIG. 50 is a diagram showing a state in which the cover member and the end cap are assembled in a misaligned manner in the LED lighting device of the comparative example. [Figure 51] FIG. 51 is a diagram showing a state in which the cover member and the end cap are assembled in a misaligned manner in the LED lighting device according to the embodiment. [Figure 52] FIG. 52 is a diagram showing the positions of the protrusions on the cover member of the first modification. [Diagram 53] FIG. 53 is a diagram showing the positions of the protrusions in the cover member of the second modification. [Figure 54] FIG. 54 is a diagram showing variations in the position of the protrusion of the cover member. [Figure 55] FIG. 55 is a half cross-sectional view of an LED lighting device according to the fifth modification. [Figure 56] FIG. 56 is a half cross-sectional view of an LED lighting device according to the sixth modification. [Figure 57] FIG. 57 is a half cross-sectional view of an LED lighting device according to the seventh modification. [Figure 58] FIG. 58 is a half cross-sectional view of an LED lighting device according to another aspect of the seventh modification. [Figure 59] FIG. 59 is a half cross-sectional view of an LED lighting device according to the eighth modification. [Figure 60] FIG. 60 is a half cross-sectional view of an LED lighting device according to another aspect of the eighth modified example. [Figure 61] FIG. 61 is a half cross-sectional view of an LED lighting device according to the ninth modification. [Figure 62] FIG. 62 is a half cross-sectional view of an LED lighting device according to the tenth modification. [Figure 63] FIG. 63 is a diagram showing a configuration of an LED lighting device according to the eleventh modification. [Figure 64] FIG. 64 is a half cross-sectional view of an LED lighting device according to the twelfth modification. [Figure 65] FIG. 65 is a half sectional view of an LED lighting device according to another aspect of the twelfth modification. [Figure 66] FIG. 66 is a half cross-sectional view of an LED lighting device according to the thirteenth modification. [Figure 67] FIG. 67 is a half cross-sectional view of an LED lighting device according to the fourteenth modification. [Figure 68] FIG. 68 is a half cross-sectional view of an LED lighting device according to the fifteenth modification. [Figure 69] FIG. 69 is a half cross-sectional view of an LED lighting device according to the sixteenth modification. [Figure 70] FIG. 70 is a half cross-sectional view of an LED lighting device according to the seventeenth modification. [Figure 71] FIG. 71 is a half cross-sectional view of an LED lighting device according to the eighteenth modification. [Figure 72] FIG. 72 is a half cross-sectional view of an LED lighting device according to the nineteenth modification. [Figure 73] FIG. 73 is a diagram showing variations of the tip portion of the extension part of the cover member in the LED lighting device according to the eighteenth modification. [Figure 74] FIG. 74 is a diagram showing a first modified example of the discontinuous portion in the fitting portion of the end cap. [Figure 75] FIG. 75 is a diagram showing a second modified example of the discontinuous portion in the fitting portion of the end cap. [Figure 76] FIG. 76 is a diagram showing a third modified example of the discontinuous portion in the fitting portion of the end cap. [Figure 77] FIG. 77 is a diagram showing a fourth modified example of the discontinuous portion in the fitting portion of the end cap. [Figure 78] FIG. 78 is a diagram showing a first modified example of the first continuous portion in the fitting portion of the end cap. [Figure 79] FIG. 79 is a diagram showing a second modified example of the first continuous portion in the fitting portion of the end cap. [Figure 80] FIG. 80 is a diagram showing the configurations of an end cap in an LED lighting device according to the embodiment and an end cap according to Modification 1. In FIG. [Figure 81] FIG. 81 shows a variation of the main portion of the end cap. [Figure 82] FIG. 82 shows a variation of an end cap having an instrument-side protrusion. [Figure 83] FIG. 83 shows variations of the first projecting piece of the end cap. [Figure 84] FIG. 84 is a diagram showing a variation of the first elastic portion of the elastic member attached to the end cap. [Figure 85]FIG. 85 is a diagram showing another variation of the first elastic portion of the elastic member attached to the end cap. [Figure 86] FIG. 86 is a perspective view of the end cap according to the second modification seen from the outer surface side. [Figure 87] FIG. 87 is a perspective view of the end cap according to the second modification when viewed from the inner surface side. [Figure 88] FIG. 88 is an enlarged perspective view of an end portion of an end cap according to the second modification. [Figure 89] FIG. 89 is a cross-sectional view of an LED lighting device according to the twenty-first modification. [Figure 90] FIG. 90 is a cross-sectional view of an LED lighting device according to the twenty-first modification. [Figure 91] FIG. 91 is a cross-sectional view of two types of cover members. [Figure 92] FIG. 92 is a cross-sectional view showing a variation of the cover member of FIG. 91(a). [Figure 93] FIG. 93 is a cross-sectional view showing a variation of the cover member of FIG. 91(b). [Figure 94] FIG. 94 is a half cross-sectional view of an LED lighting device according to a first example of the twenty-second modification. [Figure 95] FIG. 95 is a half cross-sectional view of an LED lighting device according to a second example of the twenty-second modification. [Figure 96] FIG. 96 is a half sectional view of an LED lighting device according to a third example of the twenty-second modification. [Figure 97] FIG. 97 is a half sectional view of an LED lighting device according to a fourth example of the twenty-second modification. [Figure 98] FIG. 98 is a half sectional view of an LED lighting device according to a fifth example of the twenty-second modification. [Figure 99] FIG. 99 is a half cross-sectional view of an LED lighting device according to a sixth example of the twenty-second modification. [Figure 100] FIG. 100 is a half cross-sectional view of an LED lighting device according to a seventh example of the twenty-second modification. [Figure 101] FIG. 101 is a half cross-sectional view of an LED lighting device according to an eighth example of the twenty-second modification. [Figure 102] FIG. 102 is a half cross-sectional view of an LED lighting device according to a ninth example of the twenty-second modification. [Figure 103] FIG. 103 is a half cross-sectional view of an LED lighting device according to a tenth example of the twenty-second modification. [Figure 104] FIG. 104 is a diagram showing a frame structure of the first modification. [Figure 105] FIG. 105 is a diagram showing a frame structure of the second modification. [Figure 106] FIG. 106 is a diagram showing a frame structure of the third modification. [Figure 107] FIG. 107 is a diagram showing a frame structure of the fourth modification. [Figure 108] FIG. 108 is a diagram showing the structure of a first modified example of an LED lighting device. [Figure 109] FIG. 109 is a diagram showing the structure of a second modified example of an LED lighting device. [Figure 110] FIG. 110 is a diagram showing the structure of a third modified example of an LED lighting device. [Figure 111] FIG. 111 is a cross-sectional view showing a modified example of the instrument body. [Figure 112] FIG. 112 is a cross-sectional view showing another modified example of the instrument main body. [Figure 113] FIG. 113 is a cross-sectional view showing a first modified example of the frame. [Fig. 114] FIG. 114 is a cross-sectional view showing a second modified example of the frame. [Figure 115] FIG. 115 is a cross-sectional view showing a third modified example of the frame. [Fig. 116] FIG. 116 is a cross-sectional view showing a fourth modified example of the frame. [Figure 117] FIG. 117 is a cross-sectional view showing a fifth modified example of the frame. [Fig. 118] FIG. 118 is a cross-sectional view showing a sixth modified example of the frame. [Figure 119] FIG. 119 is a cross-sectional view showing a seventh modified example of the frame. [Figure 120] FIG. 120 is a cross-sectional view showing an eighth modified example of the frame. [Figure 121] FIG. 121 is a cross-sectional view showing a ninth modified example of the frame. [Figure 122] FIG. 122 is a cross-sectional view showing a tenth modified example of the frame. [Figure 123] FIG. 123 is a cross-sectional view showing an eleventh modified example of the frame. [Figure 124] FIG. 124 is a cross-sectional view showing a twelfth modified example of the frame. [Fig. 125] FIG. 125 is a cross-sectional view showing a thirteenth modified example of the frame. [Fig. 126] FIG. 126 is a cross-sectional view showing a fourteenth modified example of the frame. [Figure 127] FIG. 127 is a cross-sectional view showing a fifteenth modified example of the frame. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a specific example of the present invention. Therefore, the numerical values, components, the arrangement and connection of the components, the steps and the order of the steps, etc. shown in the following embodiments are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not described in the independent claims showing the highest concept of the present invention will be described as optional components.

[0015] Each figure is a schematic diagram and is not necessarily illustrated precisely. In each figure, the same reference numerals are used for substantially the same configuration, and duplicated explanations are omitted or simplified. In each figure, the X-axis, Y-axis, and Z-axis represent three axes of a three-dimensional orthogonal coordinate system, and in this embodiment, the Z-axis direction is the vertical direction, and the direction perpendicular to the Z-axis (parallel to the XY plane) is the horizontal direction. The X-axis and Y-axis are mutually orthogonal, and both are orthogonal to the Z-axis. In this specification, the terms "upper" and "lower" do not necessarily refer to the upper direction (vertically upward) and the lower direction (vertically downward) in absolute spatial recognition. In this specification, "approximately", "almost", and "about" mean to include manufacturing errors or dimensional tolerances. As an example, "approximately", "almost", and "about" are within ±5%.

[0016] (Embodiment) First, the configuration of an LED lighting device 1 according to an embodiment will be described with reference to Figs. 1 to 5. Fig. 1 is a perspective view of an LED lighting device 1 according to an embodiment. Fig. 2 is an exploded perspective view of the LED lighting device 1. Figs. 3 and 4 are cross-sectional views of the LED lighting device 1, showing a cross-section when cut along a plane parallel to the short side direction of the LED lighting device 1. Fig. 3 shows a cross-section of a portion where the power supply device 4 is not present, and Fig. 4 shows a cross-section of a portion where the power supply device 4 is present. Fig. 5 is a partial cross-sectional view of the LED lighting device 1, showing a cross-section when cut along a plane parallel to the longitudinal direction of the LED lighting device 1. Specifically, Fig. 5 shows a cross-section of the periphery of one of both longitudinal ends of the LED lighting device 1.

[0017] As shown in Figs. 1 to 5, the LED lighting fixture 1 includes a fixture body 2 and an LED lighting device 3 attached to the fixture body 2. The LED lighting device 3 is an LED unit that uses an LED as a light source, and the LED lighting fixture 1 is an LED light that uses the LED lighting device 3 as a light source.

[0018] The LED lighting fixture 1 and the LED lighting device 3 are long. The total length of the LED lighting fixture 1 and the LED lighting device 3 is, for example, 2 feet, 4 feet, or 8 feet. The total length of the LED lighting device 3 in this embodiment is 4 feet. Note that 1 foot (=1 [ft]) is 304.8 [mm].

[0019] The LED lighting fixture 1, which consists of a fixture body 2 and an LED lighting device 3, has an overall D-shaped cross-sectional shape when viewed from the longitudinal direction of the LED lighting fixture 1, as shown in Figure 3, and has a clean design in which the boundary between the fixture body 2 and the LED lighting device 3 is not noticeable.

[0020] The fixture body 2 holds the LED lighting device 3. The fixture body 2 is installed at a predetermined location in a building. Specifically, the LED lighting fixture 1 is installed in a predetermined construction material such as a ceiling or wall in a room of a building such as a facility, a building, a store, or a house. In this embodiment, the LED lighting fixture 1 is a ceiling light installed on the ceiling of a building. As an example, the LED lighting fixture 1 is a ceiling-mounted LED light, and the fixture body 2 is installed on the ceiling surface of the ceiling. In this case, the LED lighting fixture 1 installed on the ceiling irradiates illumination light toward the floor side, with the floor direction (floor side) being the predetermined direction. The illumination light is irradiated from the LED lighting device 3 in the LED lighting fixture 1.

[0021] When installing the LED lighting fixture 1 on a ceiling, the fixture body 2 of the LED lighting fixture 1 is attached to the ceiling using a bolt or the like. For example, as shown in Fig. 2, a bolt 101 protruding from the ceiling is inserted into a bolt insertion hole 2d provided in the fixture body 2, and a washer and a nut are attached to the bolt 101 to fix the fixture body 2 to the bolt. Note that, depending on the construction site, the fixture body 2 may be attached using a double nut. The fixture body 2 requires a bolt projection allowance (an allowance for the bolt to be retracted into the fixture body 2), and it is desirable that the surrounding area be designed so that the components that make up the LED lighting device 3 do not interfere with it.

[0022] In addition, since the components (power supply device 4, dimming terminal block 9, functional unit, etc.) provided on the back side of the frame 20 of the LED lighting device 3 protrude from the frame 20, it is preferable that they are arranged so as not to overlap the bolt insertion hole 2d, the wiring insertion hole 2e (holes through which wiring 102 such as a power line and a dimming signal line drawn from the ceiling is inserted) and the terminal block provided in the fixture body 2, so as not to interfere with them. In particular, in a fixture body 2 with a shallow recess 2a, it is preferable that the components provided on the back side of the frame 20 are arranged so as not to overlap the bolt insertion hole, the wiring insertion hole and the terminal block. Even in a fixture body (such as a renewal fixture body) with a deep recess used in an existing lighting fixture equipped with a fluorescent lamp, it is preferable that the components provided on the back side of the frame 20 are arranged so as not to overlap the bolt insertion hole, the wiring insertion hole and the terminal block. Furthermore, since there is a possibility that two power lines (VVF cables) (for input and for feed) may be placed between the wiring insertion hole 2e (particularly the hole through which the power line is inserted) and the terminal block, it is desirable to arrange the components (wiring such as the power line) provided on the back side of the frame 20 so that they do not overlap the area between the wiring insertion hole and the terminal block.

[0023] The fixture body 2 is made of metal and is formed into a long and flat box shape in the Y-axis direction by bending a metal plate, etc. Specifically, when the fixture body 2 is installed on a ceiling, it is formed so as to have an inverted Fuji shape when viewed from the Y-axis direction.

[0024] 2, the device body 2 is provided with a recess 2a having a rectangular opening surface. The recess 2a is provided in an elongated shape along the longitudinal direction of the device body 2. That is, the shape of the recess 2a when viewed from above (the shape of the opening surface) is a rectangle with the Y-axis direction as the longitudinal direction.

[0025] As shown in Figs. 2 and 3, the device body 2 has an opening edge 2a1 located outside the recess 2a. The opening edge 2a1 (first opening edge) is located outside the short side direction (X-axis direction) of the device body 2, and is a device body side that is a side part of the device body 2. The opening edge 2a1 (device body side) constitutes the edge of the opening surface of the recess 2a in the short side direction (X-axis direction) of the device 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 part whose surface is flat, and constitutes the opening edge surface of the recess 2a.

[0026] The opening edge 2a1 is a part of the metal plate constituting the device body 2 and has a flat plate shape. As an example, the shape of the opening edge 2a1 in a top view is a long and narrow rectangle whose longitudinal direction is the Y-axis direction. In this case, the long side of the opening edge 2a1 is the long side of the rectangular opening surface of the recess 2a whose longitudinal direction is the Y-axis direction.

[0027] The opening edges 2a1 are formed on both ends in the short side direction (X-axis direction) of the device body 2. That is, the opening edges 2a1 are formed on both sides in the short side direction (width direction) of the opening surface of the recess 2a. Therefore, in the X-axis direction, the pair of opening edges 2a1 sandwich the opening surface of the recess 2a.

[0028] As shown in Figs. 1 and 2, the device body 2 has not only the opening edge 2a1 but also an opening edge 2a2 (second opening edge) located outside the recess 2a. The opening edge 2a2 is located outside the longitudinal direction (Y-axis direction) of the device body 2, and is a device body end that is an end portion of the device body 2. The opening edge 2a2 constitutes the edge of the opening surface of the recess 2a in the longitudinal direction (Y-axis direction) of the device body 2. In other words, the edge of the opening edge 2a2 on the recess 2a side is the edge of the opening surface of the recess 2a. In this embodiment, the opening edge 2a2 is a flat portion whose surface is flat, and constitutes the opening edge surface of the recess 2a.

[0029] The opening edge 2a2, like the opening edge 2a1, is a part of the metal plate constituting the device body 2 and has a flat plate shape. As an example, the opening edge 2a2 has a rectangular shape with its longitudinal direction in the X-axis direction when viewed from above. In this case, the long side of the opening edge 2a2 is the short side of the rectangular opening surface of the recess 2a with its longitudinal direction in the Y-axis direction.

[0030] The opening edges 2a2 are formed at both ends in the longitudinal direction (Y-axis direction) of the device body 2. That is, the opening edges 2a2 are formed on both longitudinal sides of the opening surface of the recess 2a. Therefore, in the Y-axis direction, the pair of opening edges 2a2 sandwich the opening surface of the recess 2a.

[0031] In this embodiment, the opening edge 2a1 on the side of the device body overlaps with the end of the opening edge 2a2 on the end of the device body in the X-axis direction. Therefore, the surface of the opening edge 2a2 is set back from the surface of the opening edge 2a1 toward the bottom side of the recess 2a by the thickness of the opening edge 2a1. In other words, the opening edge 2a2 is recessed from the opening edge 2a1 by the plate thickness of the opening edge 2a1. As a result, a step is formed at the boundary between the opening edge 2a1 and the opening edge 2a2 by the plate thickness. The width of the opening edge 2a1 is narrower than the width of the opening edge 2a2, but this is not limited to this.

[0032] The pair of opening edges 2a1 and the pair of opening edges 2a2 form a planar portion formed in a rectangular frame shape when viewed from above. The area surrounded by the pair of opening edges 2a1 and the pair of opening edges 2a2 forms the rectangular opening surface of the recess 2a.

[0033] The fixture body 2 also has an inclined surface portion 2b on each side of the recess 2a in the X-axis direction (width direction) of the fixture body 2. Each inclined surface portion 2b extends from the opening edge 2a1 (fixture body side) and has an inclined surface that inclines toward the ceiling as it goes outward. This inclined surface may function as a reflective surface.

[0034] The recess 2a of the fixture body 2 is a portion where the LED lighting device 3 is attached. Specifically, the recess 2a is a storage portion where the LED lighting device 3 is stored, and is provided over substantially the entire length of the fixture body 2, except for the opening edge 2a2 (fixture body end). As shown in FIG. 3, in this embodiment, the recess 2a has a substantially U-shaped cross section and has a pair of opposing side portions and a bottom portion. The pair of side portions are a pair of side walls erected on the bottom portion. As shown in FIG. 2, two slits 2c are provided on one of the pair of side portions of the recess 2a.

[0035] The LED lighting device 3 is fitted into the recess 2a of the fixture body 2. Specifically, the LED lighting device 3 is attached to the fixture body 2 so as to cover the recess 2a of the fixture body 2. In this embodiment, the LED lighting device 3 is detachably attached to the recess 2a of the fixture body 2. Therefore, the LED lighting device 3 can be attached to the recess 2a of the fixture body 2, and the LED lighting device 3 attached to the recess 2a of the fixture body 2 can be removed from the recess 2a.

[0036] Although details will be described later, the LED lighting device 3 and the fixture body 2 can be fixed by hooking and engaging a hook fitting 5 and an elastic holding member 6 (kick spring in this embodiment) provided on the LED lighting device 3 with the fixture body 2. The hook fitting 5 is a fitting for attaching the LED lighting device 3 to the fixture body 2. In this embodiment, the hook fitting 5 is a slide fitting, but is not limited to this.

[0037] The means for attaching the LED lighting device 3 to the fixture body 2 is not limited to the hook metal fitting 5 and the elastic holding member 6 made of a kick spring. For example, the LED 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 may be attached by a mounting member other than a spring member such as a screw or a latch. Also, the spring member such as a kick spring and the spring receiving metal fitting for receiving the spring member may be provided on either the fixture body 2 or the LED lighting device 3. In other words, the spring member may be provided on the fixture body 2 and the spring receiving metal fitting may be provided on the LED lighting device 3, or the spring member may be provided on the LED lighting device 3 and the spring receiving metal fitting may be provided on the fixture body 2.

[0038] 4, the LED lighting device 3 emits light using power supplied from a power supply device 4 housed in the fixture body 2. The power supply device 4 is a device for supplying power to a light source unit 10 of the LED lighting device 3.

[0039] The power supply device 4 is disposed on the back side of the LED lighting device 3. Specifically, the power supply device 4 is disposed in the recess 2a of the fixture body 2. That is, the power supply device 4 is housed in the recess 2a of the fixture body 2. In this embodiment, the power supply device 4 is attached to the LED lighting device 3 as a part of the LED lighting device 3 and is integrated with the LED lighting device 3. Note that the power supply device 4 may not be integrated with the LED lighting device 3 and may be disposed in the fixture body 2 separately from the LED lighting device 3. For example, the power supply device 4 may be fixed to the fixture body 2.

[0040] The power supply device 4 is configured by a power supply circuit that generates power for making the LED lighting device 3 emit light. Specifically, the power supply device 4 has a circuit board 4a such as a printed wiring board, and a plurality of electronic components 4b mounted on the circuit board 4a. In this embodiment, the power supply device 4 further has a circuit case 4c that houses the circuit board 4a on which the plurality of electronic components 4b are mounted. The circuit case 4c is a cover that covers the circuit board 4a on which the electronic components 4b are mounted. As an example, the circuit case 4c is a metal housing made of a metal plate. Note that the circuit case 4c may be a resin housing. The power supply circuit that constitutes the power supply device 4 converts AC power from an external power source such as a commercial power source into DC power of a predetermined level by rectifying, smoothing, stepping down, etc., and supplies the DC power to the LED of the LED lighting device 3.

[0041] The power supply device 4 is supplied with AC power via a power terminal block 8 (see FIG. 2) to which a power line (such as a VVF cable) is connected, which is inserted from above the ceiling into a through hole (wiring insertion hole) in the fixture body 2 and drawn into the recess 2a of the fixture body 2. A power line such as a VVF cable is an electric wire for construction work, and is an example of an electric wire. The power terminal block 8 is installed in the recess 2a of the fixture body 2.

[0042] Furthermore, when connecting the power supply terminal block 8 and the power supply unit 4 via a power line, a connector provided at one end of the power line connected to the power supply terminal block 8 may be inserted into a socket on the power supply unit 4, or a connector provided at the other end of the power line connected to the power supply terminal block 8 and a connector provided at the other end of the power line connected to the power supply unit 4 may be connected to each other, or a connector provided at the other end of the power line connected to the power supply unit 4 may be inserted into a socket on the power supply terminal block 8, or the power supply terminal block 8 provided on the LED lighting device 3 and the power supply unit 4 may be connected with a power line and the VVF cable from the ceiling may be connected to the power supply terminal block 8, or the outlet wire pulled out from the power supply unit 4 may be directly connected to the VVF cable from the ceiling.

[0043] Next, the detailed structure of the LED lighting device 3 will be described with reference to Figs. 1 to 5 and Figs. 6 to 11. Fig. 6 is a perspective view of the LED lighting device 3 according to the embodiment when viewed from the cover member 30 side, and Fig. 7 is a perspective view of the LED lighting device 3 when viewed from the back side. Fig. 8 is a cross-sectional perspective view of the LED lighting device 3. Fig. 9 is an exploded perspective view of the LED lighting device 3. Fig. 10 is a perspective view of the end portion in the longitudinal direction of the LED lighting device 3. Fig. 11 is an enlarged view of the end portion in the longitudinal direction of the LED lighting device 3. Fig. 11(a) is a top view, and Fig. 11(b) is a rear view.

[0044] 2, 6 and 7, the LED lighting device 3 is a long linear light source called a light bar. The LED lighting device 3 emits light of a predetermined color, such as white light, as illumination light.

[0045] As shown in FIGS. 3, 8 and 9, the LED lighting device 3 includes a light source unit 10, a frame 20 on which the light source unit 10 is disposed, a cover member 30 that covers the light source unit 10, and an end cap 40.

[0046] In this embodiment, the LED lighting device 3 also includes a power supply device 4. That is, the power supply device 4 is provided in the LED lighting device 3. Specifically, the power supply device 4 is attached to the ceiling side surface of the frame 20. For example, as shown in FIG. 4, the power supply device 4 is fixed to the frame 20 by screwing a part of the circuit case 4c to the main plate portion 21 of the frame 20 with a screw 60.

[0047] Each of the members constituting the LED lighting device 3 will be described in detail below.

[0048] The light source unit 10 is a light-emitting unit that emits illumination light. In this embodiment, the light source unit 10 is elongated. In this case, the elongated light source unit 10 may be a single light source unit having a length substantially equal to the overall length of the frame 20 in the longitudinal direction (Y-axis direction), or a plurality of light source units 10 may be arranged along the longitudinal direction of the frame 20. As shown in FIG. 9, in this embodiment, two light source units 10 are arranged along the longitudinal direction of the frame 20.

[0049] The light source unit 10 is an LED module using an LED, and includes a substrate 11 and an LED 12 arranged on the substrate 11, as shown in FIGS.

[0050] The substrate 11 is a mounting substrate for mounting the LEDs 12. In this embodiment, the substrate 11 is formed in a generally rectangular shape that is elongated in the longitudinal direction (Y-axis direction) of the frame 20. The thickness of the substrate 11 is, for example, 1.0 mm. As shown in FIG. 9, in this embodiment, two substrates 11 are arranged side by side along the longitudinal direction of the frame 20.

[0051] The substrate 11 is, for example, a printed wiring board (printed circuit board) 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 so as to cover the wiring in order to protect the wiring and ensure a dielectric strength voltage. The substrate 11 may be a single-sided wiring substrate on which wiring is formed only on the main surface on which the LEDs 12 are mounted, or a double-sided wiring substrate on which wiring is formed on both sides.

[0052] The base material constituting the substrate 11 may be a resin substrate made of an insulating resin material, a ceramic substrate made of a sintered body of a ceramic material such as alumina, or a metal-based substrate obtained by applying an insulating coating to the surface of a metal substrate made of a metal material such as aluminum or copper.

[0053] When the substrate 11 is made of a resin substrate, examples of the resin substrate that can be used include a glass epoxy substrate (CEM-3, FR-4, etc.) made of glass fiber and epoxy resin, a paper phenol substrate (FR-1, FR-2) made of craft paper or the like and phenol resin, a paper epoxy substrate (FR-3) made of paper and epoxy resin, or a polyimide substrate made of polyimide, etc. The substrate 11 may be a rigid substrate or a film-like flexible substrate.

[0054] The metal wiring formed on the substrate 11 is electrically connected to the power supply device 4. In this case, the electrodes or connector terminals formed on the substrate 11 and the power supply device 4 are connected by electric wires such as lead wires. The electric wires connecting the substrate 11 and the power supply device 4 are inserted, for example, into through holes provided in the frame 20.

[0055] The substrate 11 is disposed on the frame 20. The substrate 11 has a first surface on which the LEDs 12 are mounted, and a second surface facing away from the first surface. The first surface of the substrate 11 is the surface on the cover member 30 side, and the second surface of the substrate 11 is the surface on the frame 20 side. In this embodiment, the second surface of the substrate 11 is in contact with the frame 20.

[0056] As shown in Figs. 8 and 9, the LEDs 12 are arranged on the substrate 11. Specifically, a plurality of LEDs 12 are arranged on the first surface of the substrate 11. In this embodiment, the plurality of LEDs 12 are mounted in a linear row along the longitudinal direction (Y-axis direction) of the substrate 11 at predetermined intervals. Specifically, the plurality of LEDs 12 are mounted over substantially the entire length of the longitudinal direction of the substrate 11. Therefore, the plurality of LEDs 12 are mounted along the longitudinal direction of the frame 20 and the cover member 30. The plurality of LEDs 12 may be mounted in multiple rows, not in a row, along the longitudinal direction of the substrate 11. The plurality of LEDs 12 emit light by a direct current supplied from the power supply device 4 via an electric wire connecting the power supply device 4 and the substrate 11.

[0057] The LED 12 is an example of a light emitting element. In this embodiment, each of the LEDs 12 is an individually packaged LED element (LED light source) having an SMD structure. Therefore, the light source unit 10 is an SMD type LED module.

[0058] The SMD type LED 12 includes a white resin or ceramic container (package), an LED chip (bare chip) disposed in the container, and a sealing member for sealing 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 filled in the container.

[0059] The light source section 10 thus configured is disposed on a frame 20. Specifically, the substrate 11 of the light source section 10 is disposed on the frame 20.

[0060] The frame 20 is an elongated mounting member (base member) to which the light source section 10 is attached. Specifically, the substrate 11 of the light source section 10 is attached to the frame 20.

[0061] The frame 20 is formed in an elongated shape in the Y-axis direction, similar to the light source unit 10 and the fixture body 2. The light source unit 10 is supported by the frame 20. That is, the frame 20 is a support member that supports the light source unit 10. In the present embodiment, the frame 20 not only supports the light source unit 10, but also supports the cover member 30. Specifically, the board 11 on which the LEDs 12 are arranged is placed on the frame 20 and fixed to the frame 20, whereby the board 11 on which the LEDs 12 are arranged is supported by the frame 20.

[0062] The frame 20 is plate-shaped. In this embodiment, the frame 20 is made of metal and is configured of a metal plate. The frame 20 is formed into a predetermined shape by, for example, performing roll forming and / or press working on a single sheet metal (metal plate) made of SPCC (Steel Plate Cold Commercial; cold rolled steel plate). The thickness of the metal plate configuring the frame 20 is, for example, 0.2 mm to 2 mm. In this embodiment, since the frame 20 is formed by sheet metal working, the thickness of the metal plate configuring the frame 20 is preferably 1 mm or less. Specifically, the thickness of the metal plate configuring the frame 20 is set to 0.5 mm. Note that the method of manufacturing the frame 20 is not limited to roll forming and press working, and may be aluminum extrusion molding or the like.

[0063] As shown in Fig. 3 and Fig. 4, the plate-like frame 20 has a main plate portion 21, a pair of standing plate portions 22, a pair of horizontal plate portions 23, and a pair of side plate portions 24. As shown in Fig. 9, the main plate portion 21, the pair of standing 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 Fig. 3 and Fig. 4, in this embodiment, the frame 20 is formed symmetrically on the XZ cross section with respect to the center of the frame 20 in the short side direction, but this is not limited to this.

[0064] The main board 21 is the main body of the frame 20. The main board 21 is a plate-like body having a constant thickness and a flat shape as a whole. As shown in FIG. 3, the light source 10 is disposed on the main board 21. Specifically, the board 11 on which the LEDs 12 are disposed is placed on the main board 21. In other words, the main board 21 supports the board 11. In this embodiment, the board 11 and the main board 21 are in contact with each other. The LEDs 12 of the light source 10 are disposed in the center of the main board 21 in the width direction, but this is not limited thereto.

[0065] The main board 21 has a first surface which faces the substrate 11, and a second surface facing away from the first surface. In this embodiment, the first surface of the main board 21 is a substrate mounting surface to which the substrate 11 is attached. When the LED lighting device 1 is installed on a ceiling, the frame 20 is arranged so that the first and second surfaces of the main board 21 are approximately parallel to the ceiling surface. In this case, the first surface of the main board 21 is the surface facing the floor, and the second surface of the main board 21 is the surface facing the ceiling.

[0066] 3, the main plate 21 is located closer to the ceiling than the opening surface of the recess 2a of the fixture body 2 (i.e., the bottom surface side of the recess 2a). In this embodiment, the LED 12 is also located closer to the bottom surface side of the recess 2a than the opening surface of the recess 2a of the fixture body 2. Specifically, the main plate 21 and the LED 12 are located closer to the ceiling than the opening edge 2a1 of the recess 2a. This can increase the distance between the cover member 30 and the LED 12, thereby suppressing uneven brightness (graininess) of the multiple LEDs 12 arranged in a straight line.

[0067] As shown in Figs. 8 and 9, the main plate portion 21 is formed with a claw piece 21a that is formed by cutting and raising a part of the frame 20 made of a metal plate.

[0068] The substrate 11 placed on the main plate 21 is fixed to the main plate 21 by being engaged with the claw 21a. In this case, for example, the substrate 11 may be slid to engage the substrate 11 with the claw 21a and the end of the substrate 11 in the longitudinal direction may be engaged with another claw, or the substrate 11 may be fixed to the main plate 21 by crimping the claw 21a to engage the substrate 11 with the claw 21a. The method of fixing the main plate 21 and the substrate 11 is not limited to the engagement structure using the claw 21a, and the main plate 21 and the substrate 11 may be bonded and fixed with an adhesive or an adhesive tape. In addition, the main plate 21 and the substrate 11 are in contact with each other, but this is not limited thereto. For example, a separate member such as a heat conductive sheet may be inserted between the main plate 21 and the substrate 11. Furthermore, main plate portion 21 is provided with a through hole through which an electric wire for electrically connecting wiring of substrate 11 and power supply device 4 is inserted.

[0069] The pair of standing plate portions 22 are standing plate portions standing on the main plate portion 21. Specifically, one of the pair of standing plate portions 22 stands upright from one end portion of the main plate portion 21, and the other of the pair of standing plate portions 22 stands upright from the other end portion of the main plate portion 21. The standing plate portions 22 and the horizontal plate portion 23 are provided between the main plate portion 21 and the side plate portion 24. Each of the pair of standing plate portions 22 is flat.

[0070] 3, in this embodiment, the main surface of each of the pair of standing plate portions 22 is perpendicular to the main surface of the main plate portion 21, and extends in a direction perpendicular to the short side direction of the frame 20. That is, the standing plate portion 22 is provided perpendicular to the main plate portion 21. Specifically, each of the pair of standing plate portions 22 extends along the Z-axis direction. Note that the standing plate portion 22 may be formed so as to be inclined with respect to the main plate portion 21.

[0071] As shown in Figs. 3 and 4, the recess 20a is formed by a main plate portion 21 and a pair of standing plate portions 22. The bottom of the recess 20a is the main plate portion 21. Therefore, the board 11 on which the LEDs 12 are mounted is disposed on the bottom (main plate portion 21) of the recess 20a. In this manner, the frame 20 has the recess 20a on which the board 11 is disposed. In addition, the side of the recess 20a is the standing plate portion 22. In this embodiment, the cross-sectional shape of the recess 20a is U-shaped. In other words, the cross-sectional shape of the spatial region of the recess 20a (the region surrounded by the main plate portion 21 and the pair of standing plate portions 22) is rectangular.

[0072] The cross-sectional shape of the recess 20a does not have to be U-shaped. In other words, the cross-sectional shape of the spatial region of the recess 20a does not have to be rectangular. For example, the cross-sectional shape of the spatial region of the recess 20a may be trapezoidal. In this case, the main plate portion 21 corresponds to the lower or upper base of the trapezoidal recess 20a, and the standing plate portion 22 corresponds to the side of the trapezoidal recess 20a that is inclined relative to the main plate portion 21.

[0073] The light source unit 10 arranged at the bottom of the recess 20a is stored in the recess 20a. In this embodiment, the depth of the recess 20a is greater than the height (thickness) of the light source unit 10, and the light source unit 10 is stored so as not to protrude from the recess 20a. That is, the LED 12 is stored in the recess 20a. Therefore, the floor side end (light emitting surface) of the LED 12 of the light source unit 10 is located closer to the ceiling than the opening surface of the recess 20a. In this case, the floor side end of the LED 12 may be located at a position retreated from the opening surface of the recess 20a, or may be flush with the opening surface of the recess 20a. In this way, by storing the LED 12 in the recess 20a, the distance between the LED 12 and the main part 31 of the cover member 30 can be increased, so that the brightness unevenness (graininess) caused by the multiple LEDs 12 arranged at a distance in the longitudinal direction of the frame 20 can be suppressed.

[0074] In the present embodiment, the LEDs 12 of the light source unit 10 are housed in the recess 20a so as not to protrude from the recess 20a in the Z-axis direction, but this is not limited thereto. For example, a 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 may be disposed so as not to protrude from the recess 20a, and the depth of the recess 20a may be greater than the thickness of the substrate 11 of the light source unit 10.

[0075] Also, as shown in FIG. 4, if the depth of the recess 20a of the frame 20 is a [mm] and the width of the recess 20a is w1 [mm], it is preferable that the relational expression w1≧10×a is satisfied. In other words, the ratio of the depth a of the recess 20a to the width w1 of the recess 20a is 1:10 or more. This makes it possible to prevent the light emitted from the LED 12 from being blocked by hitting the corner of the opening surface of the recess 20a (the connection portion between the vertical plate portion 22 and the horizontal plate portion 23) even if the light source portion 10 is stored in the recess 20a. In other words, by making w1≧10×a, it is possible to make it difficult for the light emitted from the LED 12 to be blocked. In this case, if the width of the recess 20a is w1 [mm] and the width of the horizontal plate portion 23 is w2 [mm], it is preferable that the relational expression w1>2×w2 is satisfied.

[0076] Furthermore, the frame 20 has a protruding portion 20b as a protruding structure that protrudes from the main board portion 21 toward the light emission side of the light source unit 10. In other words, when the direction of the light emission side of the light source unit 10 is defined as a first direction with respect to the main board portion 21, the protruding portion 20b protrudes toward the first direction from the main board portion 21. When the LED lighting device 1 is installed on a ceiling, the protruding portion 20b of the frame 20 protrudes toward the floor side.

[0077] The protruding portion 20b is provided in a pair on both sides of the main plate portion 21 in the short direction of the frame 20. The pair of protruding portions 20b is formed on the frame 20 by forming the recessed portion 20a on the frame 20. In this embodiment, since the recessed portion 20a is formed so as to be recessed toward the ceiling side, each of the pair of protruding portions 20b is formed so as to protrude toward the floor side. Each of the pair of protruding portions 20b is composed of a horizontal plate portion 23 and a vertical plate portion 22. In this manner, by forming the protruding portion 20b on the main plate portion 21, the strength of the frame 20 can be improved. The recessed portion 20a and the pair of protruding portions 20b can be formed by deforming a metal plate constituting the frame 20 by press processing or the like. Specifically, the recessed portion 20a and the protruding portion 20b are formed by bending a metal plate. Therefore, the plate thicknesses of the main plate portion 21, the vertical plate portion 22, the horizontal plate portion 23, and the side plate portion 24 are the same.

[0078] The horizontal plate portion 23 is located beside the recessed portion 20a. In this embodiment, the horizontal plate portion 23 is located on both sides of the recessed portion 20a in the short-side direction of the frame 20. That is, a pair of horizontal plate portions 23 are formed to sandwich the recessed portion 20a. Specifically, one of the pair of horizontal plate portions 23 is located on one side of the recessed portion 20a in the short-side direction of the frame 20, and the other of the pair of horizontal plate portions 23 is located on the other side of the recessed portion 20a in the short-side direction of the frame 20. That is, one of the pair of horizontal plate portions 23 is located on one side of the main plate portion 21 in the short-side direction of the frame 20, and the other of the pair of horizontal plate portions 23 is located on the other side of the main plate portion 21 in the short-side direction of the frame 20. Each of the pair of horizontal plate portions 23 is connected to the end portion on the floor side of the standing plate portion 22 and extends outward from the end portion on the floor side of the standing plate portion 22.

[0079] In addition, when a first direction, which is the direction of the light emission side of the light source unit 10 (LED 12) with respect to the main board portion 21, is taken as the floor side direction, and a second direction, which is the direction opposite to the floor side direction (first direction) with respect to the main board portion 21, is taken as the ceiling side (i.e., the construction material side), at least a part of each of the pair of horizontal board portions 23 is located on the floor side (first direction side) of the main board portion 21. In this embodiment, the entire horizontal board portion 23 is located on the floor side of the main board portion 21. Therefore, a pair of protruding portions 20b, each of which is composed of a standing board portion 22 and a horizontal board portion 23, is located on the floor side of the main board portion 21. As a result, a spatial area is formed on the ceiling side of each protruding portion 20b. The spatial area is an area surrounded by the protruding portion 20b on the ceiling side of the frame 20. In other words, this spatial area is an area surrounded by the standing board portion 22 and the horizontal board portion 23 on the ceiling side of the frame 20. In this embodiment, since the side plate portion 24 is provided on the side of the horizontal plate portion 23 opposite to the standing plate portion 22, this spatial region is an area surrounded by the standing plate portion 22, the horizontal plate portion 23, and the side plate portion 24, and is a concave recessed portion recessed toward the floor side. As will be described in detail later, this spatial region may store internal electric wires, construction electric wires (external electric wires), structural members such as springs and screws, or functional parts. In particular, since the side plate portion 24 exists as the outer wall of this spatial region, the internal electric wires stored in the spatial region are less likely to protrude from the spatial region. This makes it possible to prevent the internal electric wires from protruding and becoming caught in the wires.

[0080] Furthermore, this spatial region may house not only one internal wire but also multiple internal wires. The one or multiple internal wires housed in this spatial region are fixed to the frame 20 by a fixing member such as tape or metal fittings. In this case, this spatial region may be utilized to attach tape or to attach metal fittings. For example, when fixing the internal wires using metal fittings, the metal fittings are fixed to the spatial region so as to cover the spatial region in which the internal wires are housed. In this case, the metal fittings are preferably disposed between the standing plate portion 22 and the side plate portion 24 so as to be braced against the space.

[0081] The internal wires do not have to be stored in this spatial region. In this case, the internal wires may be arranged on the ceiling side surface of the main board portion 21 of the frame 20, and the internal wires may be adhesively fixed with tape. However, if the tape is attached only to the main board portion 21, the tape is likely to peel off. Therefore, in this case, it is preferable to attach the tape by utilizing this spatial region. For example, the internal wires may be arranged on the ceiling side surface of the main board portion 21, and the tape may be attached so as to straddle the main board portion 21 and the standing board portion 22. In this way, the tape is attached to two surfaces facing in different directions, and therefore peeling of the tape can be suppressed.

[0082] As shown in the enlarged view of Fig. 3, each of the pair of horizontal plate portions 23 is composed of a plurality of plate portions. In the present embodiment, the horizontal plate portion 23 is composed of two plate portions, and has, as the plurality of plate portions, a parallel plate portion 23a (first plate portion) parallel to the main plate portion 21 and an inclined plate portion 23b (second plate portion) inclined with respect to the main plate portion 21. In other words, the protruding portion 20b has the parallel plate portion 23a and the inclined plate portion 23b. Both the parallel plate portion 23a and the inclined plate portion 23b are flat.

[0083] In the horizontal plate portion 23, the parallel plate portion 23a extends in the short-side direction (width direction) of the frame 20, and the inclined plate portion 23b extends in a direction inclined with respect to the short-side direction of the frame 20. In this embodiment, the inclined plate portion 23b is inclined so as to widen toward the ceiling side. Therefore, the protruding portion 20b composed of the standing plate portion 22 and the horizontal plate portion 23 is configured to be inclined outward as a whole. The inclined plate portion 23b is located outside the parallel plate portion 23a and is connected to the end of the side plate portion 24. In this embodiment, the length of the parallel plate portion 23a is longer than the length of the inclined plate portion 23b.

[0084] 3 and 4, at least a part of the pair of protrusions 20b formed on the frame 20 is located on the floor side of the opening surface of the recess 2a of the instrument body 2. In other words, at least a part of the pair of protrusions 20b is located on the floor side of the opening edge 2a1 of the recess 2a of the instrument body 2. In this embodiment, the pair of horizontal plate portions 23 are located on the floor side of the opening surface of the recess 2a of the instrument body 2. Specifically, both the parallel plate portion 23a and the inclined plate portion 23b of the horizontal plate portion 23 are located on the floor side of the opening surface of the recess 2a.

[0085] The protruding portion 20b, which is composed of the horizontal plate portion 23 and the standing plate portion 22, may be configured to be inclined inward. In this case, the inclined plate portion 23b of the horizontal plate portion 23 is located inside the parallel plate portion 23a and is connected to an end of the main plate portion 21, and the standing plate portion 22 is located outside the parallel plate portion 23a of the horizontal plate portion 23 and is connected to an end of the side plate portion 24.

[0086] As shown in Figs. 3 and 4, the pair of side plate portions 24 are plate-shaped side portions and are formed as a pair of legs (feet) on the frame 20. Each of the pair of side plate portions 24 extends toward the side opposite to the light emission side of the light source unit 10. The pair of side plate portions 24 are extending portions that extend toward the construction material on which the fixture body 2 is installed. In this embodiment, the construction material on which the fixture body 2 is installed is the ceiling, and the fixture body 2 is installed on the ceiling. Therefore, the pair of side plate portions 24 extend toward the ceiling side (second direction side). Specifically, each of the pair of side plate portions 24 extends linearly along the Z-axis direction.

[0087] When the LED lighting device 3 is attached to the fixture body 2, the pair of side plate portions 24 are housed in the recesses 2a of the fixture body 2. Each side plate portion 24 faces a side surface of the recesses 2a. Each of the pair of side plate portions 24 extends along each of the side surfaces (side walls) of the pair of recesses 2a. As shown in Fig. 3, the side plate portions 24 and the side surfaces of the recesses 2a are parallel to each other.

[0088] Each of the pair of side plate portions 24 extends from each of the pair of protruding portions 20b toward the ceiling side. In this embodiment, each of the pair of side plate portions 24 extends from the end of the horizontal plate portion 23 toward the ceiling side. One of the pair of side plate portions 24 extends from the outer end of one of the pair of horizontal plate portions 23 toward the ceiling side, and the other of the pair of side plate portions 24 extends from the outer end of the other of the pair of horizontal plate portions 23 toward the ceiling side. In other words, the pair of side plate portions 24 extend from the outer end of the protruding portion 20b in the short direction of the frame 20 toward the ceiling side. Specifically, each of the pair of side plate portions 24 is connected to the inclined plate portion 23b of the horizontal plate portion 23 and extends from the end of the inclined plate portion 23b toward the ceiling side.

[0089] Each of the pair of side plate portions 24 extends from the outer end of each horizontal plate portion 23 toward the ceiling side beyond the position of the main plate portion 21. Therefore, the tip of each side plate portion 24 (extension portion) is located closer to the ceiling side (second direction side) than the main plate portion 21. In other words, the tip of the side plate portion 24 (extension portion) is located closer to the ceiling side than the bottom of the recessed portion 20a. In this embodiment, the side plate portion 24 is connected to the inclined plate portion 23b of the horizontal plate portion 23. Note that the side plate portion 24 is not formed on both ends of the frame 20 in the longitudinal direction, and the ends of the frame 20 in the longitudinal direction are open.

[0090] The connection portion between the side plate portion 24 and the horizontal plate portion 23 (in this embodiment, the connection portion between the side plate portion 24 and the inclined plate portion 23b) is preferably located closer to the floor (first direction side) than the main plate portion 21, which is the bottom of the recess 20a in the frame 20. This makes it easier for the light emitted from the LED 12 to wrap around to the spatial region formed in the vicinity of the cover end portion 31a of the cover member 30. Note that if the connection portion between the side plate portion 24 and the horizontal plate portion 23 is located closer to the ceiling than the bottom of the recess 20a, the light emitted from the LED 12 will wrap around to the ceiling side, causing light leakage and light loss.

[0091] Furthermore, the connection portion between the side plate portion 24 and the horizontal plate portion 23 (in this embodiment, the connection portion between the side plate portion 24 and the inclined plate portion 23b) is at substantially the same height as the opening edge 2a1 of the recess 2a of the fixture body 2, but the connection portion between the side plate portion 24 and the horizontal plate portion 23 may be located closer to the ceiling than the opening edge 2a1 of the recess 2a of the fixture body 2. This makes it possible to prevent shadows from appearing on the exterior of the cover member 30.

[0092] Furthermore, it is preferable that the connection portion between the side plate portion 24 and the horizontal plate portion 23 is located closer to the ceiling (second direction side) than the connection portion between the attachment portion 33 and the extension portion 32 in the cover member 30. This makes it possible to prevent shadows from appearing on the appearance of the cover member 30. In this embodiment, the position of the opening edge 2a1 of the recess 2a of the device body 2 is the same as the position of the connection portion between the attachment portion 33 and the extension portion 32 in the cover member 30.

[0093] In this way, the connection portion between the side plate portion 24 and the horizontal plate portion 23 may be located in the area between the position of the main plate portion 21, which is the bottom of the recess 20a, and the position of the opening edge 2a1 of the recess 2a in the main body 2 of the appliance, or the position of the connection portion between the mounting portion 33 and the extension portion 32 in the cover member 30.

[0094] Also, the length (extension amount) of the side plate portion 24 is longer than the depth of the recess 20a. That is, if the depth of the recess 20a is a [mm] and the length of the side plate portion 24 is b [mm], it is preferable that the relational expression b≧a is satisfied. In this case, the upper limit of the length b of the side plate portion 24 is not particularly limited, but the depth a of the recess 20a and the length b of the side plate portion 24 are preferable to satisfy the relational expression b≦2×a. That is, the ratio of the depth of the recess 20a to the length of the side plate portion 24 is preferable to be 1:2 or less. By satisfying the relational expression b≧a, the strength of the frame 20 is increased and the strength of the entire LED lighting device 3 is improved. This makes it easier to handle the LED lighting device 3 during construction, etc. Also, by satisfying the relational expression b≧a, the length of the side plate portion 24 is increased. This allows the cover member 30 to be easily attached to the frame 20 by snap-in. Also, by satisfying the relational expression b≧a, it is possible to shorten the thickness of the entire frame 20 in the Z-axis direction, and thus to make the frame 20 thinner. It should be noted that the relational expression b≧a does not necessarily have to be satisfied.

[0095] Also, the connection portion between the side plate portion 24 and the horizontal plate portion 23 may be located closer to the ceiling than the main plate portion 21. In this case, the length b of the side plate portion 24 is preferably longer than the depth a of the recess 20a (i.e., b>a), but the length b of the side plate portion 24 may be shorter than the depth a of the recess 20a. In this case, the lower limit of the length b of the side plate portion 24 is not particularly limited. The depth a of the recess 20a is preferably 3 mm or more.

[0096] As shown in FIG. 3 and FIG. 4, the tip portion of each of the pair of side plate portions 24 is provided with a bent portion 24a formed to be bent. The bent portion 24a constitutes the tip portion of the side plate portion 24. In the present embodiment, the bent portion 24a is a folded portion formed by folding back the tip portion of the side plate portion 24 in the thickness direction. Therefore, the bent portion 24a is composed of a folded portion and a portion (a portion not folded back) facing the folded portion. The bent portion 24a is a hemming bend structure formed by, for example, hemming. Note that the bent portion 24a is not limited to being formed by hemming, and may be a curl bend structure formed by curling and rolling up the tip portion of the side plate portion 24. In addition, the bent portion 24a is formed by folding inward in the width direction, but is not limited thereto, and may be formed by folding outward in the width direction. In addition, the bent portion 24a may not be formed in the side plate portion 24.

[0097] Mounting portions 33 of the cover member 30 are attached to each of the pair of side plate portions 24. In the present embodiment, the cover member 30 is attached to the frame 20 by snapping in. Specifically, the cover member 30 can be fixed to the frame 20 by engaging abutment portions 33a provided on the mounting portions 33 of the cover member 30 with bent portions 24a of the side plate portions 24 from the width direction of the cover member 30. Therefore, the bent portions 24a are abutment portions that come into contact with the mounting portions 33.

[0098] The light source unit 10 supported by the frame 20 is covered with a cover member 30. The cover member 30 covers the LEDs 12 of the light source unit 10. In this embodiment, the cover member 30 covers all the LEDs 12 in the light source unit 10. The cover member 30 also covers not only the LEDs 12 but also the board 11 of the light source unit 10, and is disposed opposite the board 11 so as to cover the multiple LEDs 12. In other words, the cover member 30 covers the entire light source unit 10. In this manner, the cover member 30 is attached to the frame 20 so as to cover the light source unit 10.

[0099] The cover member 30 is an example of a light-transmitting cover having translucency, and transmits light emitted from the light source unit 10 (LEDs 12). In the present embodiment, the cover member 30 is a diffusion cover having not only translucency but also diffusibility. Therefore, the light of the LEDs 12 that enters the cover member 30 is diffused (scattered) by the cover member 30 and passes through the cover member 30.

[0100] 8, the cover member 30 further covers the frame 20 in which the light source unit 10 is arranged. In the present embodiment, the cover member 30 covers the entire frame 20 in which the light source unit 10 is arranged. Note that the cover member 30 is formed in an elongated shape in the Y-axis direction, similar to the light source unit 10 and the frame 20.

[0101] The cover member 30 is attached to the frame 20. Furthermore, the cover member 30 and the frame 20 form a cylindrical body, and the light source unit 10 is housed within this cylindrical body.

[0102] As shown in Figures 3 and 8, the cover member 30 has a main portion 31 that covers the light source unit 10, an extension portion 32 that extends toward the inside of the cover member 30, and an attachment portion 33 to which the frame 20 is attached.

[0103] 3, there is a gap between the cover member 30 and the inner surface of the recess 2a of the device body 2. In this embodiment, this gap is a gap between the attachment portion 33 of the cover member 30 and the inner wall surface of the recess 2a.

[0104] The main part 31 is a main body part of the cover member 30, and transmits light emitted from the LEDs 12 of the light source unit 10 to irradiate the light to the outside. The main part 31 covers the light source unit 10. In other words, the main part 31 faces the light source unit 10. Therefore, the main part 31 has a surface facing the substrate 11 and the LEDs 12.

[0105] The main part 31 constitutes the exterior of the cover member 30. As shown in FIG. 9, the main part 31 is elongated in the Y-axis direction and formed in a gutter shape. The main part 31 has, for example, a flattened, approximately semi-cylindrical shape. Therefore, the main part 31 has an open end face in the shape of an elongated rectangle extending in the Y-axis direction. In addition, the cross-sectional shape of the main part 31 when cut along the X-axis direction has a curved shape that is curved in an approximately arc shape. The shape of the main part 31 is not limited to a barrel-like R shape, and may be an angular shape such as a U-shape, a angular shape with a part of the side surface narrowed, or a cylindrical shape.

[0106] In this embodiment, when the cover member 30 is viewed from the longitudinal direction of the LED lighting device 3, the outer shape of the cover member 30 is generally D-shaped. Specifically, when viewed from the longitudinal direction of the LED lighting device 3, the outer shape of the main part 31 is generally D-shaped. As described above, the side shape of the LED lighting device 1 consisting of the LED lighting device 3 and the fixture body 2 is also generally D-shaped, and the boundary between the LED lighting device 3 and the fixture body 2 is not noticeable. For this reason, as shown in FIG. 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 portion 2b in the fixture body 2 are flush with each other. In other words, the outer surface of the main part 31 and the outer surface of the inclined surface portion 2b are continuous, and there is no step at the boundary between the outer surface of the main part 31 and the outer surface of the inclined surface portion 2b, or even if there is a step, it is only slight.

[0107] The main part 31 has a cover end 31a which is an outer end located outside the protruding part 20b of the frame 20 in the short direction of the frame 20. Specifically, the cover end 31a is a part located outside the mounting part 33 in the main part 31. The cover end 31a faces the opening edge 2a1 of the recess 2a of the instrument body 2. The opening edge 2a1 of the recess 2a is a flat surface parallel to the XY plane. In this embodiment, the cover end 31a abuts against the instrument body 2. Specifically, the cover end 31a abuts against the opening edge 2a1 (instrument body side) of the recess 2a of the instrument body 2.

[0108] The extension portion 32 extends toward the light source unit 10. In this embodiment, the extension portion 32 is connected to the main portion 31 and extends from the main portion 31 toward the light source unit 10. Therefore, the extension portion 32 extends from the main portion 31 toward the inside of the cover member 30. Specifically, the extension portion 32 extends from the inner surface of the main portion 31 toward the light source unit 10. The extension portion 32 also extends toward the main plate portion 21 of the frame 20. In this embodiment, the extension portion 32 extends from the main portion 31 toward the main plate portion 21. Note that the extension portion 32 extending toward the light source unit 10 or the main plate portion 21 only needs to have a part of the extension portion 32 extending toward the light source unit 10 or the main plate portion 21. The extension portion 32 is a plate-shaped piece with a constant thickness, and extends in the Y-axis direction as shown in FIG. 8 and FIG. 9.

[0109] A pair of extension parts 32 are provided. The pair of extension parts 32 are provided on either side of the light source unit 10 in the short-side direction of the frame 20. Specifically, the pair of extension parts 32 are provided at positions facing each other in the X-axis direction. In the present embodiment, the pair of extension parts 32 are formed symmetrically with respect to the center of the cover member 30 in the short-side direction in the XZ cross section, but this is not limited thereto.

[0110] Each extension portion 32 covers at least a part of the protruding portion 20b of the frame 20. That is, each extension portion 32 covers at least a part of the protruding portion 20b and faces the main plate portion 21. In the present embodiment, each extension portion 32 covers the entire protruding portion 20b. Therefore, each extension portion 32 extends from the main portion 31 beyond the protruding portion 20b.

[0111] Moreover, the extension portion 32 is formed in an arch shape so as to cover the protrusion 20b. Therefore, the extension portion 32 has an arch shape that is convex toward the main portion 31. This allows the light emitted from the light source unit 10 to be reflected by the extension portion 32, thereby improving the light extraction efficiency. Furthermore, when the protrusion 20b is formed on the frame 20, a shadow is likely to be generated on the outer end of the cover member 30. However, by providing the arch-shaped extension portion 32 so as to cover the protrusion 20b, it is possible to make it difficult for a shadow to be generated on the outer end of the cover member 30.

[0112] Each extension portion 32 has an outer extension portion 32a located outside the protruding portion 20b, and an inner extension portion 32b extending from the outer extension portion 32a toward the light source unit 10 while covering at least a part of the protruding portion 20b. In this embodiment, the inner extension portion 32b covers the entire protruding portion 20b. The outer extension portion 32a is located outside the horizontal plate portion 23 of the frame 20 in the short direction of the frame 20.

[0113] The outer extension portion 32a is a portion located outside the mounting portion 33, and the inner extension portion 32b is a portion located inside the mounting portion 33. In this case, as shown in Fig. 3, the outer extension portion 32a is a portion formed in a flat plate shape, and the inner extension portion 32b is a portion formed so as to bend at the horizontal plate portion 23 of the frame 20. The inner extension portion 32b is bent so as to cover the protruding portion 20b of the frame 20.

[0114] Further, each extension portion 32 extends from the inner surface of the main portion 31 toward the LED 12 side. Each extension portion 32 extends from a position on the ceiling side (second direction side) of the portion of the protruding portion 20b of the frame 20 located on the inner surface of the main portion 31 closest to the floor (first direction side) toward the light source portion 10 side so as to cover the protruding portion 20b. In this embodiment, the portion of the protruding portion 20b of the frame 20 located closest to the floor side is the parallel plate portion 23a of the horizontal plate portion 23. That is, each extension portion 32 extends from a position on the ceiling side of the parallel plate portion 23a of each protruding portion 20b toward the light source portion 10 side. Specifically, each extension portion 32 is connected to the tip of the cover end portion 31a of the main portion 31. Therefore, in each extension portion 32, the outer extension portion 32a is connected to the tip of the cover end portion 31a of the main portion 31, and the outer extension portion 32a extends from the cover end portion 31a of the main portion 31 toward the light source portion 10 side.

[0115] In this way, the extension portion 32 extends toward the light source unit 10 from a position on the ceiling side of the portion of the horizontal plate portion 23 of the frame 20 that is located closest to the floor side, so as to cover the protruding portion 20b of the frame 20. This allows a spatial area that spreads toward the ceiling side outside the protruding portion 20b of the frame 20 to be formed in the vicinity of the cover end 31a of the cover member 30. As a result, even if the protruding portion 20b protruding toward the floor side is provided on the frame 20, the light emitted from the LED 12 that does not pass through the main portion 31 of the cover member 30 and is reflected on the inner surface of the main portion 31 can be made to go around to the spatial area formed in the vicinity of the cover end 31a of the cover member 30. Therefore, the light emitted from the LED 12 can be sufficiently spread to the cover end 31a of the main portion 31 of the cover member 30, so that the light can be sufficiently illuminated up to the vicinity of the cover end 31a of the main portion 31 of the cover member 30. Therefore, the cover member 30 can be illuminated over the entire width direction (X-axis direction), and it is possible to prevent the ends of the cover member 30 in the width direction from becoming dark. In other words, it is possible to reduce the darkness of the ends of the cover member 30 in the width direction caused by the protruding parts 20b of the frame 20.

[0116] Furthermore, by providing the extension portion 32 on the cover member 30, the luminous flux of the illumination light emitted from the LED lighting device 3 toward the ceiling side (upward luminous flux) can also be reduced. As a result, the luminous flux of the illumination light emitted from the LED lighting device 3 toward the floor side can be increased, so that the light extraction efficiency of the LED lighting device 3 toward the floor side can be improved. Furthermore, by increasing the luminous flux toward the floor side, the direct illuminance of the LED lighting fixture 1 can be improved. As a result, when multiple LED lighting fixtures 1 are installed, the number of LED lighting fixtures 1 to be installed can be reduced.

[0117] The outer extension portion 32a of the extension portion 32 has a portion that overlaps with the gap between the inner surface of the recess 2a and the mounting portion 33 in the direction toward the floor side or the ceiling side (i.e., in the Z direction). The outer extension portion 32a faces the opening edge 2a1 of the recess 2a. That is, in the Z-axis direction, the outer extension portion 32a overlaps with the opening edge 2a1. Therefore, the outer extension portion 32a is formed so as to span the gap between the inner surface of the recess 2a and the mounting portion 33.

[0118] The portion of the outer extension portion 32a of each extension portion 32 facing the opening edge 2a1 and the cover end 31a of the main portion 31 form a protrusion protruding outward from the mounting portion 33. Specifically, this protrusion is formed in a V-shaped cross section in the XZ cross section. The outer extension portion 32a does not protrude outward from the widthwise outer end of the opening surface of the recess 2a of the fixture body 2. Specifically, the outer extension portion 32a does not protrude outward in the Y-axis direction from the opening edge 2a1 of the recess 2a. Specifically, the connection portion (the apex of the V) between the outer extension portion 32a and the cover end 31a of the main portion 31 exists on almost the same plane as the inclined surface portion 2b of the fixture body 2. As a result, the inclined surface portion 2b of the fixture body 2 and the surface of the main portion 31 of the cover member 30 become one continuous surface, improving the design of the LED lighting device 3.

[0119] The outer extension portion 32a of each extension portion 32 is a portion that connects the inner extension portion 32b and the main portion 31. Therefore, one end of the outer extension portion 32a is connected to the inner extension portion 32b, and the other end of the outer extension portion 32a is connected to the inner surface of the main portion 31.

[0120] The outer extension portion 32a is a contact portion that can contact the opening edge 2a1 of the recess 2a of the fixture body 2. When the LED lighting device 3 is stored in the recess 2a of the fixture body 2, the outer extension portion 32a may or may not contact the opening edge 2a1. In other words, there may be a gap between the outer extension portion 32a and the opening edge 2a1, or the outer extension portion 32a and the opening edge 2a1 may be in contact. In this embodiment, the outer extension portion 32a contacts the opening edge 2a1.

[0121] Furthermore, when the LED lighting device 3 is attached to the fixture body 2 by pulling it up with the elastic holding member 6 (kick spring), the outer extension 32a abuts against the opening edge 2a1 of the fixture body 2, thereby attaching the LED lighting device 3 to the fixture body 2. For this reason, it is desirable that the outer extension 32a and the opening edge 2a1 abut against each other. However, a gap may occur between the outer extension 32a and the opening edge 2a1 due to warping, twisting, or undulation of various parts such as the frame 20 or the cover member 30, or variations during installation of the LED lighting fixture 1 (distortion due to bolt tightening, variations due to wiring, etc.).

[0122] The outer extension portion 32a may be a part of the main portion 31. In this case, the extension portion 32 is composed of only the inner extension portion 32b.

[0123] At least a part of the extension portion 32 has a shape that follows a part of the frame 20. In this embodiment, at least a part of the extension portion 32 has a shape that follows the protruding portion 20b of the frame 20. Specifically, as described above, the inner extension portion 32b of the extension portion 32 has a shape that follows the protruding portion 20b of the frame 20. Specifically, the inner extension portion 32b has a shape that follows the inclined plate portion 23b of the protruding portion 20b of the frame 20.

[0124] As shown in Fig. 3, the inner extension portion 32b is bent so as to protrude toward the floor side. That is, the inner extension portion 32b is formed to have a protruding portion that protrudes toward the floor side, similar to the protruding portion 20b of the frame 20. The protruding portion 20b of the frame 20 protrudes toward the bent portion (protruding portion) of this inner extension portion 32b. Therefore, the protruding portion 20b of the frame 20 is formed to fit into the protruding portion of the inner extension portion 32b.

[0125] Also, at least a part of the inner extension portion 32b can abut against the frame 20. As described later, in this embodiment, the tip of the inner extension portion 32b abuts against the main plate portion 21 of the frame 20. Basically, the cover member 30 abuts against the frame 20 only at two points, the tip of the inner extension portion 32b and the tip (abutment portion 33a) of the mounting portion 33, so that a gap exists between the inner extension portion 32b and the protruding portion 20b of the frame 20. However, depending on component variations, assembly variations, construction variations, etc., the inner extension portion 32b may abut against a part of the protruding portion 20b. The inner extension portion 32b may be intentionally brought into contact with the protruding portion 20b.

[0126] The tip of each extension portion 32 on the light source unit 10 side is located closer to the center of the frame 20 than the protruding portion 20b of the frame 20. Specifically, the tip of the inner extension portion 32b of the extension portion 32 is located to the side of the protruding portion 20b.

[0127] The inner extension portion 32b has a first plate portion 32b1 that faces the protrusion 20b of the frame 20, a second plate portion 32b2 that extends from a position beyond the protrusion 20b toward the light source unit 10, and a third plate portion 32b3 that stands upright from the second plate portion 32b2 toward the ceiling side.

[0128] The first plate portion 32b1 faces the horizontal plate portion 23 that constitutes the protruding portion 20b, and, like the horizontal plate portion 23, is composed of an inclined plate portion and a parallel plate portion.

[0129] The second plate portion 32b2 is an inclined plate portion that extends from a position beyond the protruding portion 20b (horizontal plate portion 23) so as to be inclined toward the main plate portion 21 of the frame 20. Note that the second plate portion 32b2 does not have to be inclined. For example, the second plate portion 32b2 may be parallel to the main plate portion 21 of the frame 20.

[0130] The third plate portion 32b3 is a vertical plate portion standing from the tip of the second plate portion 32b2 toward the ceiling side. That is, the third plate portion 32b3 is standing on the main plate portion 21 of the frame 20. Specifically, the third plate portion 32b3 is a vertical portion formed perpendicular to the main plate portion 21 of the frame 20. The third plate portion 32b3 is the tip of the inner extension portion 32b. That is, the tip of the third plate portion 32b3 is the tip of the extension portion 32 on the light source unit 10 side. The height (length) of the third plate portion 32b3 is lower than the height of the protruding portion 20b formed on the main plate portion 21 of the frame 20 (the position of the horizontal plate portion 23 in this embodiment).

[0131] The inner extension portion 32b has an inner portion in the short side direction of the cover member 30 with a gentler inclination than the short side direction of the cover member 30. That is, the inclination of the portion on the light source unit 10 side is gentler than the inclination of the portion on the mounting unit 33 side. Specifically, the inclination of the second plate portion 32b2 (inclined plate portion) of the inner extension portion 32b is gentler than the inclination of the inclined plate portion of the first plate portion 32b1 of the inner extension portion 32b. That is, the inclination angle of the second plate portion 32b2 (inclined plate portion) of the inner extension portion 32b is smaller than the inclination angle of the inclined plate portion of the first plate portion 32b1 of the inner extension portion 32b.

[0132] The tip of each extension portion 32 on the light source unit 10 side is located closer to the center of the frame 20 than the protrusion 20b of the frame 20. Specifically, the tip of the third plate portion 32b3 of the inner extension portion 32b of each extension portion 32 is located closer to the center of the frame 20 than the inner end of the horizontal plate portion 23 of the frame 20.

[0133] The third plate portion 32b3 of the inner extension portion 32b is formed so that its tip extends toward the substrate 11. In the present embodiment, the third plate portion 32b3 is formed so as to slope toward the substrate 11.

[0134] The extension portion 32 has an abutment portion 32c that abuts against the main plate portion 21 of the frame 20. The abutment portion 32c of the extension portion 32 abuts against the main plate portion 21 of the frame 20 in a pressed state. In this embodiment, the abutment portion 32c is a tip portion of the extension portion 32. Therefore, the tip portion of the extension portion 32 abuts against the main plate portion 21 of the frame 20 in a pressed state. Specifically, the abutment portion 32c is a tip portion of the inner extension portion 32b. That is, the abutment portion 32c is the third plate portion 32b3 of the inner extension portion 32b. In this case, the end face of the tip portion of the third plate portion 32b3, which is the abutment portion 32c, abuts against the main plate portion 21 of the frame 20 in a pressed state.

[0135] The extension portion 32 pressed against the frame 20 is elastically deformed. In other words, the extension portion 32 is elastically deformed, and the reaction force presses the abutment portion 32c (third plate portion 32b3) against the main plate portion 21 of the frame 20. Therefore, the attitude of the extension portion 32 with respect to the frame 20 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.

[0136] Each extension portion 32 may be disposed outside the directional characteristic (light distribution angle) of the LED 12. For example, since the light distribution angle (1 / 2 beam angle) of the LED 12 is 120°, the opening angle (inclination angle of the second plate portion 32b2) of the pair of extension portions 32 may be 120° or more. This reduces the loss of the light emitted from the LED 12 in the cover member 30, and most of the light emitted from the LED 12 passes through the cover member 30 and is emitted to the outside. In other words, the light extraction efficiency of the cover member 30 can be improved. The opening angle of the pair of second plate portions 32b2 may be 160° or more. The upper limit of the opening angle of the pair of second plate portions 32b2 is, for example, 170°. The light extraction rate can be further improved by making the extension portion 32 white (highly reflective and non-transmissive) by two-color molding.

[0137] A spatial region S1 exists between each extension portion 32 and the frame 20. Specifically, the spatial region S1 exists between the inner extension portion 32b of each extension portion 32 and the main plate portion 21 of the frame 20. The spatial region S1 may house the screw base or screw head when various components are screwed together, or may house a crimped portion when the frame 20 and another metal component are crimped together. In this embodiment, as shown in FIG. 4, the spatial region S1 houses the screw base of a screw 60 for fixing the power supply device 4 and the frame 20 together.

[0138] Additionally, the spatial region S1 may house functional components or internal electric wires that are wired in a factory when the LED lighting device 3 is manufactured.

[0139] The functional parts stored in the spatial region S1 are, for example, function expansion modules. Examples of the function expansion module include a sensor unit equipped with various sensors such as a human sensor and a brightness sensor, a wireless module having an antenna and a control circuit for receiving wireless signals, an infrared module having a light receiving element and a control circuit for receiving infrared signals, a pull switch, or a second light source other than the LED 12 (first light source) mounted on the substrate 11. The wireless signal or infrared signal is, for example, a remote control signal for turning on and off the LED 12 or adjusting the brightness and color, or a setting signal for performing various settings of the LED lighting device 3. The second light source is a light source for monitor display (monitor lamp), a light source for controlling the light distribution of the illumination light emitted from the cover member 30 (for example, a light source for wide light distribution), a color light source for directing (for example, LED light sources of red, blue, green, etc.), or an emergency light source that is turned on in an emergency. When an emergency light source is used as the second light source, the cover and / or the cover member 30 that covers the second light source may be made of a flame-retardant material such as glass. Note that wireless is not limited to a specific frequency band, and may refer to wireless in a broad sense including radio waves and light (including infrared rays). The antenna in the wireless module may be, for example, a pattern antenna, a chip antenna, a rod antenna, or a plate antenna, but is not limited to these. The wireless module may have an antenna area and a control area. The connection between the wireless module and the power supply device may be a connector on both ends of an electric wire, or only one of the wireless module and the power supply device may be a connector. The connection between the wireless module and the power supply device 4 may be a wireless connection by wireless communication, instead of a wired connection by an electric wire.

[0140] The internal electric wires stored in the spatial region S1 are, for example, electric wires connected to the power supply device 4 or electric wires connecting the plurality of light source units 10 together. Among these, the electric wires connected to the power supply device 4 include a power supply line connecting the power supply device 4 and the light source units 10, a power line connecting the power supply device 4 and the power terminal block 8, a dimming control line connecting the power supply device 4 and the dimming terminal block 9, and a control line connected to a function expansion module (sensor, etc.) described later.

[0141] The mounting portion 33 of the cover member 30 extends on the side opposite to the light emission side of the light source unit 10. Specifically, the mounting portion 33 is connected to the extension portion 32, and extends from a part of the extension portion 32 toward the ceiling side. The mounting portion 33 is attached to a pair of side plate portions 24 of the frame 20.

[0142] Even if a foreign object such as an insect or dust invades the spatial region S1, the distance between the spatial region S1 and the main portion 31 is long, so that a shadow is unlikely to be created by the foreign object present in the spatial region S1. In addition, the gap region between the inclined plate portion 23b of the frame 20 and the inner extension portion 32b is close to the main portion 31, so that if an insect is present in this gap region, it is likely to be a shadow, but since this gap region is small, it is difficult for insects to accumulate. Even if an insect invades this gap region, the insect has propulsion ability, so the insect will move from this gap region toward the spatial region S1 and enter the spatial region S1 where a shadow is unlikely to be created. In addition, since the entrance (exit of the gap region) of the spatial region S1 is narrow, once the insect enters the spatial region S1, the insect will not exit the spatial region S1. In other words, the insect can be kept in the spatial region S1 where a shadow is unlikely to be created. In addition, this is not the case when the extension portion 32 is made of an opaque material such as white resin.

[0143] In this embodiment, a pair of mounting portions 33 are provided to sandwich the frame 20. The pair of mounting portions 33 are formed as a pair of legs (feet) of the cover member 30. The pair of mounting portions 33 have the same length in the Z-axis direction. As shown in Figs. 8 and 9, each of the pair of mounting portions 33 is formed in an elongated shape along the Y-axis direction. The pair of mounting portions 33 also have the same length in the Y-axis direction.

[0144] When the cover member 30 is attached to the frame 20, each of the pair of attachment portions 33 is elastically deformed. As will be described in detail later, the posture of each attachment 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.

[0145] As shown in FIGS. 3 and 8, each of the pair of mounting portions 33 has abutment portions 33a that abut against the pair of side plate portions 24 of the frame 20. That is, the mounting portions 33 are in contact with the side plate portions 24 of the frame 20 at the abutment portions 33a. In this embodiment, the abutment portions 33a of the mounting portions 33 are tip portions of the mounting portions 33. Therefore, the tip portions of the mounting portions 33 are in contact with the side plate portions 24 of the frame 20. Also, in this embodiment, the abutment portions 33a of the mounting portions 33 are engagement portions that engage with the tip portions of the side plate portions 24 of the frame 20. Therefore, the tip portions of the mounting portions 33 are engaged with the tip portions of the side plate portions 24 of the frame 20.

[0146] In this embodiment, the abutting portion 33a serving as the engaging portion is, for example, a bent portion formed by bending the tip portion of the mounting portion 33 into an L-shape. The bent portion 24a provided at the tip portion of the side plate portion 24 of the frame 20 engages with the abutting portion 33a, whereby the pair of mounting portions 33 of the cover member 30 and the pair of side plate portions 24 of the frame 20 are locked and fixed to each other. As a result, the pair of mounting portions 33 of the cover member 30 are fixed to the frame 20 so as to embrace the frame 20.

[0147] Also, the side plate portion 24 of the frame 20 and the mounting portion 33 of the cover member 30 may be fixed with a screw. In this case, the screw is screwed into the portion where the side plate portion 24 and the mounting portion 33 overlap from the outside of the mounting portion 33. Alternatively, the frame 20 and the cover member 30 may be fixed with a crimping structure. For example, the frame 20 and the cover member 30 may be fixed by crimping a part of the side plate portion 24 of the frame 20 to the mounting portion 33 of the cover member 30. Also, the frame 20 and the cover member 30 may be fixed with a separate part such as a metal fitting.

[0148] In the present embodiment, as described above, the cover member 30 is attached to the frame 20 by fitting the mounting portion 33 of the cover member 30 into the side plate portion 24 of the frame 20 by snap-in from the width direction of the cover member 30, but the present invention is not limited to this. For example, the cover member 30 may be attached to the frame 20 by inserting the cover member 30 from an end portion of the frame 20 in the longitudinal direction and sliding the cover member 30.

[0149] In the present embodiment, the contact portion 33a formed at the tip of the attachment portion 33 is bent at an angle, but is not limited thereto. For example, the contact portion 33a may be bent at a right angle into an L-shape. The contact portion 33a may also be formed so that the tip is folded back. In this case, the contact portion 33a has a recessed portion having a cross-sectional shape that is substantially U-shaped or C-shaped.

[0150] There may be a gap between the extension portion 32 of the cover member 30 and the frame 20. Specifically, there may be a gap between the extension portion 32 and the protruding portion 20b of the frame 20. Therefore, the extension portion 32 and the protruding portion 20b are not in contact with each other. Specifically, even when the LED lighting device 3 is stored in the recess 2a of the fixture body 2, the extension portion 32 and the protruding portion 20b are not in contact with each other. Note that the extension portion 32 and the protruding portion 20b may be in contact with each other.

[0151] Also, a gap, which is a space, exists between the mounting portion 33 of the cover member 30 and the side plate portion 24 of the frame 20. Therefore, the mounting portion 33 and the side plate portion 24 are not in contact with each other. However, the mounting portion 33 and the side plate portion 24 may be in contact with each other.

[0152] The cover member 30 is made of a translucent resin material such as acrylic or polycarbonate, or a material having translucency such as a glass material. In this embodiment, the cover member 30 is made of a translucent resin material. In this case, the cover member 30 can be a milky white cover member with a light diffusing material dispersed therein. Such a cover member 30 can be produced by resin molding a translucent resin material mixed with a light diffusing material into a predetermined shape. As the light diffusing material, light reflective fine particles such as silica particles can be used.

[0153] The cover member 30 may be configured by forming a milky light diffusion film containing a light diffusion material or the like on the surface (inner or outer surface) of the transparent cover, rather than dispersing a light diffusion material inside. The cover member 30 may also be configured to have light diffusion properties by performing a diffusion process, rather than using a light diffusion material. For example, the cover member 30 may be configured to have light diffusion properties by performing a surface treatment such as a graining process to form minute irregularities on the surface of the transparent cover, or by printing a dot pattern on the surface of the transparent cover. Even when the cover member 30 is subjected to a diffusion process, a light diffusion material may be further contained in order to enhance light diffusion properties.

[0154] In this embodiment, the main part 31, the extension part 32, and the attachment part 33 constituting the cover member 30 are integrally formed. Therefore, the main part 31, the extension part 32, and the attachment part 33 are made of the same material. The main part 31, the extension part 32, and the attachment part 33 all have the same material strength, but this is not limited to this. For example, the material strengths of the main part 31, the extension part 32, and the attachment part 33 may be different. In this case, it is preferable that the material strength of the main part 31 is greater than the material strength of the extension part 32 and the material strength of the attachment part 33. This configuration can suppress deformation of the main part 31. In other words, the shape of the main part 31 is stabilized. This can reduce the effect of deformation of the cover member 30 on the optical performance.

[0155] The thicknesses of the main part 31, the extension part 32, and the attachment part 33 are not particularly limited, but are, for example, 0.5 mm or more and 5 mm or less. As an example, the thickness of the main part 31 may be 1 mm or less. The main part 31, the extension part 32, and the attachment part 33 all have the same thickness, but this is not limited to this. For example, the thicknesses of the main part 31, the extension part 32, and the attachment part 33 may be different. In this case, it is preferable that the thickness of the main part 31 is larger than the thickness of the extension part 32 and the thickness of the attachment part 33. This configuration can suppress deformation of the main part 31. In other words, the shape of the main part 31 is stabilized. This can reduce the effect of deformation of the cover member 30 on the optical performance.

[0156] In the present embodiment, the main portion 31, the extension portion 32, and the mounting portion 33 are made of the same resin material, but this is not limited thereto. The main portion 31, the extension portion 32, and the mounting portion 33 may be made of two or more types of materials. In this case, the main portion 31 and the extension portion 32 can be made of different resin materials. For example, the main portion 31 can be made of a translucent resin material, and a part or all of the extension portion 32 can be made of a white or milky white resin material. The mounting portion 33 is made of the same resin material as the main portion 31 or the extension portion 32. Specifically, the main portion 31, the mounting portion 33, the outer extension portion 32a of the extension portion 32, and the second plate portion 32b2 of the inner extension portion 32b of the extension portion 32 can be made of a translucent resin material, and the first plate portion 32b1 and the third plate portion 32b3 of the inner extension portion 32b of the extension portion 32 can be made of a white or milky white resin material. In this way, by making a part or the whole of the extension portion 32 white or milky white, the extension portion 32 (for example, the inner extension portion 32b) can have a reflecting function. As a result, the light emitted from the LED 12 that reaches the extension portion 32 can be reflected by the inner extension portion 32b and made to enter the main portion 31. As a result, the light extraction efficiency of the LED lighting device 3 can be improved. Therefore, since the direct illuminance of the LED lighting device 1 can be improved, when a plurality of LED lighting devices 1 are installed, the number of LED lighting devices 1 installed can be reduced. In addition, by making the mounting portion 33 white or milky white, it is possible to reduce the leakage of light into the inside of the device main body 2. The cover member 30 thus partially made of a white or milky white resin material can be formed by two-color molding. The extension portion 32 may be molded by two layers of two colors. For example, the base layer of the extension portion 32 may be made of the same translucent resin material as the main portion 31, and the surface layer of the extension portion 32 (layer laminated on the base layer) may be made of a white or milky white resin material.

[0157] The cover member 30 has both ends in the longitudinal direction thereof closed. In this embodiment, both ends in the longitudinal direction of the cover member 30 are closed by end caps 40. Specifically, a long cylindrical body is formed by fixing the cover member 30 and the frame 20, and the end caps 40 are attached to both ends in the longitudinal direction of the cylindrical body. A spatial region S2 is formed between the cover member 30 and the frame 20. This spatial region S2 is a region (insect-proof region) configured to prevent foreign objects 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 spatial region S2 is a region closed by the main part 31 and the 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 disposed in this spatial region S2.

[0158] The end cap 40 is a component for preventing foreign objects such as insects and dust from entering the inside of the cylinder formed by the cover member 30 and the frame 20. The end cap 40 is provided to close the open end of the cylinder formed by the frame 20 and the cover member 30. In other words, the end cap 40 is attached to the cylinder so as to cover the open end of the cylinder formed by the frame 20 and the cover member 30, and closes the open end of the cylinder. This makes it possible to prevent foreign objects such as insects and dust from entering the inside of the cylinder formed by the frame 20 and the cover member 30. In other words, it is possible to prevent foreign objects such as insects and dust from entering the spatial region S2.

[0159] 5 to 11, the end caps 40 are cover ends provided at the longitudinal ends of the cover member 30. The end caps 40 are provided at both longitudinal ends of the cover member 30. The end caps 40 are connected directly or indirectly to the longitudinal ends of the cover member 30.

[0160] As shown in FIG. 9, the end cap 40 provided at one end in the longitudinal direction of the cover member 30 is a first end cap 40a, and the end cap 40 provided at the other end in the longitudinal direction of the cover member 30 is a second end cap 40b. In this embodiment, the first end cap 40a and the second end cap 40b are the same part. That is, the shape of the second end cap 40b is the same as the shape of the first end cap 40a. This can reduce costs. The first end cap 40a and the second end cap 40b are arranged in an opposite relationship in the longitudinal direction (Y-axis direction) of the cover member 30.

[0161] Further, an elastic member 50 is attached to the end cap 40. The detailed configurations of the end cap 40 and the elastic member 50 will be described later.

[0162] 3 and 4, a spatial region S3 is formed on the ceiling side of the frame 20. That is, the spatial region S3 exists between the fixture body 2 and the frame 20. The spatial region S3 is also a part or the whole of the recess 2a of the fixture body 2.

[0163] The power supply device 4 is disposed in this spatial region S3. That is, the power supply device 4 is disposed on the ceiling side of the frame 20. In this embodiment, the center position of the power supply device 4 is shifted from the center position in the short-side direction of the LED lighting device 3, and the power supply device 4 is disposed biased toward the short-side direction of the LED lighting device 3 (short-side direction of the frame 20) in the spatial region S3. Specifically, the power supply device 4 is biased toward the hook metal fitting 5 side (left side in FIG. 4). In addition, the side plate portion 24 of the frame 20 is shortened, and the circuit board 4a of the power supply device 4 is located closer to the ceiling side than the tip of the side plate portion 24 of the frame 20 in the circuit case 4c.

[0164] Electric wires used in the LED lighting device 3 may be arranged in the spatial region S3 between the fixture body 2 and the frame 20. The electric wires used in the LED lighting device 3 include construction wires (construction wiring) that are wired when the LED lighting fixture 1 is installed on a ceiling or the like, and internal fixture wires (internal fixture wiring) that are wired in a factory when the LED lighting device 3 is manufactured.

[0165] Examples of the construction wires include power wires such as VVF cables and signal wires such as dimming signal wires. The construction wires such as power wires and signal wires are drawn from the ceiling, for example, and connected to predetermined locations of the LED lighting fixture 1 when the LED lighting fixture 1 is installed. For example, the power wire such as the VVF cable is connected to the power terminal block 8, and the dimming signal wire is connected to the dimming terminal block 9. Examples of the internal wires disposed in the spatial region S3 include the internal wires described above. In addition, functional components such as the above-mentioned function expansion module may be stored in the spatial region S3.

[0166] Since a lead-in wiring may be installed inside the LED lighting fixture 1, it is desirable to provide a space for at least one power line such as a VVF cable to pass through in the spatial region S3 between the LED lighting device 3 and the recess 2a of the fixture body 2. The lead-in wiring may be held (temporarily held or arranged) on the fixture body 2 side, or may be held (temporarily held or arranged) on the LED lighting device 3 side.

[0167] As an example, FIG. 4 shows an example in which a VVF cable 71 and a signal line 72 are arranged in the spatial region S3 as the construction electric wires. In this case, in the present embodiment, the power supply device 4 is arranged biased in the spatial region S3, so that the ceiling side of one of the pair of horizontal plate parts 23 of the frame 20 (the right horizontal plate part 23 in FIG. 4) is opened. As a result, as shown in FIG. 4, in the region in the spatial region S3 in which the power supply device 4 exists, the region on one side in the short direction of the LED lighting device 3 is larger than the region on the other side. That is, one side of the two sides of the power supply device 4 in the spatial region S3 is a wide region, and the other side of the two sides of the power supply device 4 in the spatial region S3 is a narrow region. For this reason, it is preferable to arrange the construction electric wires in the wider region of the two regions on both sides of the power supply device 4. In particular, in the present embodiment, the length (height) of the side plate part 24 of the frame 20 is short, so that the space in the vertical direction of the spatial region S3 around the side plate part 24 can be further widened. Therefore, the construction electric wires can be arranged by effectively utilizing the expanded spatial region S3. For example, the construction electric wires can be arranged close to the ceiling end of the spatial region S3 on the side of the fixture body 2. In this way, the construction electric wires can be arranged by effectively utilizing the expanded spatial region S3, which prevents the LED lighting device 3 from being lifted due to interference from the construction electric wires, thereby preventing a gap from being generated between the fixture body 2 and the LED lighting device 3.

[0168] In addition, the construction wires may be arranged separately in a wide area and a narrow area in the spatial area S3. In this case, the VVF cable 71, which is a relatively thick wire, may be arranged in the wide area of ​​the two areas on either side of the power supply device 4, and the signal line 72, which is a relatively thin wire, may be arranged in the narrow area of ​​the two areas on either side of the power supply device 4.

[0169] The power supply device 4 does not have to be disposed biasedly in the width direction of the frame 20, but may be disposed in the center of the width direction of the frame 20. In this case, the construction electric wires and the electric wires inside the fixture may be disposed on both sides of the power supply device 4. In other words, a wiring insertion portion may be provided on both sides of the power supply device 4.

[0170] Furthermore, functional parts such as a function expansion module may be disposed in the spatial region S3. In this case, the function expansion module may be provided in the LED lighting device 3 (for example, an end portion of the power supply device 4), or may be attached to the fixture body 2 at a distance from the LED lighting device 3. Furthermore, the function expansion module may not be pre-installed in the LED lighting fixture 1, but may be able to be retrofitted by an installer, or may have compatibility so that it can be replaced with a different function.

[0171] In the LED lighting device 3 according to this embodiment, as shown in Fig. 3 and Fig. 4, a spatial area is formed on the ceiling side of the protrusion 20b formed on the frame 20 by the protrusion 20b. Components such as functional parts or electric wires in the fixture can also be stored in this spatial area. Note that the method of utilizing this spatial area is not limited to storing components such as functional parts or electric wires in the fixture, and this spatial area can also be used for centering metal fittings, positioning metal fittings, guiding metal fittings, earthing, etc.

[0172] The LED lighting device 3 configured in this manner is stored in the recess 2a of the fixture body 2 and attached to the fixture body 2. Specifically, the LED lighting device 3 is attached to the fixture body 2 using a hook 5 and an elastic holding member 6 shown in Figures 3, 6 and 7. The hook 5 and the elastic holding member 6 are fixed to the frame 20.

[0173] As shown in FIG. 3, the hook fitting 5 is disposed on the ceiling side of the frame 20. The hook fitting 5 is a plate member made of sheet metal. The hook fitting 5 is fixed to an end of the frame 20. As an example, the hook fitting 5 is fixed to the frame 20 by a fixing member such as a screw, and extends so as to protrude outward from the frame 20. The hook fitting 5 is hooked to the fixture body 2. In this embodiment, a slit 2c (see FIG. 2) is provided on the inner wall surface of the recess 2a of the fixture body 2, and the hook fitting 5 is hooked to this slit 2c.

[0174] The elastic holding member 6 is a part for mounting the LED lighting device 3 to the fixture body 2. In this embodiment, the elastic holding member 6 is, for example, a spring such as a kick spring, and the LED lighting device 3 is pulled up toward the fixture body 2 by the elastic force of the elastic holding member 6. The elastic holding member 6 is attached to the ceiling side (back surface) of the main plate portion 21 of the frame 20. Specifically, the elastic holding member 6 is fixed to an end portion in the width direction of the frame 20. In this embodiment, the elastic holding member 6 is fixed to the opposite side of the hook metal fitting 5 in the width direction of the frame 20. In this case, the elastic holding member 6 is fixed to the frame 20 by a fixing member such as a screw. Specifically, the elastic holding member 6 is fixed to a holding metal fitting 6c (see FIG. 7) fixed to the frame 20 by a mounting screw. The elastic holding member 6 is detachably attached to the fixture body 2. In this embodiment, the elastic holding member 6 is detachably engaged with a receiving metal fitting 7 fixed to the fixture body 2.

[0175] 2, two hook fittings 5 ​​and two elastic retaining members 6 are provided at each end of the frame 20 in the longitudinal direction, but this is not limited to this. Also, the hook fittings 5 ​​and the elastic retaining members 6 are provided at positions facing each other in the lateral direction of the frame 20, but this is not limited to this.

[0176] Next, a method for attaching the LED lighting device 3 to the fixture body 2 will be described with reference to Fig. 12. Fig. 12 is a diagram for explaining a method for attaching the LED lighting device 3 to the fixture body 2 in the LED lighting fixture 1 according to the embodiment.

[0177] When attaching the LED lighting device 3 to the fixture body 2 installed on the ceiling 100, first, as shown in FIG. 12(a), the hook bracket 5 is hooked onto the slit 2c (see FIG. 2) provided in the fixture body 2 to hang the LED lighting device 3 in a cantilevered state, and the power supply unit 4 is connected to the power line drawn from the ceiling. One end of the elastic retaining member 6, which is a kick spring, is engaged with the receiving bracket 7 fixed to the fixture body 2.

[0178] Next, as shown in FIG. 12(b), the hook fitting 5 is pushed deep into the slit 2c while rotating the LED lighting device 3 around the hook fitting 5 as a fulcrum, thereby pushing the LED lighting device 3 up into the recess 2a of the fixture body 2.

[0179] At this time, in this embodiment, the power supply device 4 is disposed offset to one side in the width direction of the frame 20. Specifically, the power supply device 4 is disposed close to the rotation axis side when rotating the LED lighting device 3. In this way, by disposing the heavy power supply device 4 close to the rotation axis side, it is possible to rotate the LED lighting device 3 with a small force.

[0180] Then, by rotating the LED lighting device 3 and pushing it into the recess 2a of the fixture body 2, the LED lighting device 3 can be fitted into the recess 2a of the fixture body 2 as shown in (c) of Fig. 12. At this time, the LED lighting device 3 is pulled up by the spring elastic force of the elastic holding member 6 (kick spring), so that the outer extension part 32a of the extension part 32 abuts against the opening edge 2a1 of the recess 2a of the fixture body 2. This allows the LED lighting device 3 to be attached to the fixture body 2.

[0181] When removing the LED lighting device 3 from the fixture body 2, the above-mentioned operations can be reversed to remove the LED lighting device 3 from the fixture body 2. For example, the LED lighting device 3 can be removed from the fixture body 2 by rotating the LED lighting device 3 while pulling it down.

[0182] Here, a manufacturing method of the LED lighting device 3 (light bar) according to the embodiment will be described with reference to Fig. 13. In particular, the process of attaching the cover member 30 to the frame 20 when assembling the LED lighting device 3 will be mainly described. Fig. 13 is a diagram for explaining the state of attaching the cover member 30 to the frame 20 in the manufacturing method of the LED lighting device 3 according to the embodiment. In Fig. 13, the solid line portion shows the state after the cover member 30 is attached to the frame 20, and the dashed line portion shows the positions of the extension portion 32 and the attachment portion 33 of the cover member 30 before the cover member 30 is attached to the frame 20.

[0183] When assembling the LED lighting device 3, first, the light source unit 10 is fixed to the frame 20 (light source unit fixing process). For example, the board 11 on which the LEDs 12 are mounted is engaged with a tab 21a formed on the main board 21 of the frame 20, thereby fixing the board 11 to the main board 21. This allows the light source unit 10 to be fixed to the frame 20.

[0184] Thereafter, the cover member 30 is attached to the frame 20 to which the light source unit 10 is fixed (cover member attachment process). In this embodiment, the cover member 30 is attached to the frame 20 by fitting the attachment portion 33 of the cover member 30 to the side plate portion 24 of the frame 20 from the width direction of the cover member 30. Specifically, one attachment portion 33 of the cover member 30 is engaged with one side plate portion 24 of the frame 20, and the cover member 30 is rotated with this engaged portion as a fulcrum, so that the other attachment portion 33 of the cover member 30 is engaged with the other side plate portion 24 of the frame 20. In this way, the cover member 30 can be fitted into the frame 20.

[0185] In this step, a part of the extension portion 32 of the cover member 30 is pressed against and brought into contact with the frame 20. In this embodiment, the tip surface of the third plate portion 32b3 of the extension portion 32 is pressed against the surface of the main plate portion 21 of the frame 20.

[0186] 13, the extension portion 32 has a different attitude with respect to the frame 20 before and after the cover member 30 is attached to the frame 20. Specifically, when the position of the main portion 31 is aligned before and after the cover member 30 is attached to the frame 20, the position of the third plate portion 32b3 (contact portion 32c) of the extension portion 32 before the cover member 30 is attached to the frame 20 is closer to the ceiling than the position of the third plate portion 32b3 (contact portion 32c) after the cover member 30 is attached to the frame 20. As a result, when the cover member 30 is attached to the frame 20, the extension portion 32 deforms with the connection point between the outer extension portion 32a and the inner extension portion 32b or the connection point between the outer extension portion 32a and the main portion 31 as a fulcrum, and the third plate portion 32b3, which is the tip portion of the extension portion 32, abuts against the main plate portion 21. Specifically, the tip surface of the third plate portion 32b3 of the extension portion 32 is pressed against the surface of the main plate portion 21. At this time, the extension portion 32 is pushed back and elastically deformed. In other words, the extension portion 32 is bent. As a result, the third plate portion 32b3 of the extension portion 32 becomes the abutment portion 32c and abuts against the main plate portion 21 of the frame 20 in a pressed state.

[0187] In this manner, the LED lighting device 3 can be manufactured. When the LED lighting device 3 is subsequently attached to the fixture body 2 installed on a ceiling or the like, the installation can be performed by the method shown in FIG. 12 as described above.

[0188] 13, before the cover member 30 is attached to the frame 20, the attachment portion 33 is inclined with respect to the side plate portion 24 of the frame 20, but this is not limited thereto. Specifically, as shown by the dashed line portion in FIG. 14, the attachment portion 33 may be parallel to the side plate portion 24 of the frame 20 before the cover member 30 is attached to the frame 20. As a result, the attachment portion 33 is elastically deformed and inclined with respect to the side plate portion 24 of the frame 20 after the cover member 30 is attached to the frame 20. Note that in FIG. 14 as well, as in FIG. 13, the solid line portion indicates the state after the cover member 30 is attached to the frame 20, and the dashed line portion indicates the positions of the extension portion 32 and the attachment portion 33 in the cover member 30 before the cover member 30 is attached to the frame 20.

[0189] In this way, by fitting the cover member 30 into the frame 20 from the width direction, the mounting portion 33 of the cover member 30 is inclined so that the tip of the mounting portion 33 moves toward the side plate portion 24 of the frame 20, and the mounting portion 33 comes into contact with the side plate portion 24 of the frame 20. As a result, the side plate portion 24 of the frame 20 is pressed by the mounting portion 33, so that the mounting portion 33 and the side plate portion 24 can be firmly locked together. Therefore, it is possible to prevent the cover member 30 from coming off the frame 20.

[0190] 13 and 14, the mounting portion 33 has a different attitude with respect to the frame 20 before and after the cover member 30 is attached, but this is not limited to the above. That is, the mounting portion 33 does not need to have a different attitude with respect to the frame 20 before and after the cover member 30 is attached. That is, the mounting portion 33 does not need to be elastically deformed.

[0191] In addition, in order to control the elastic deformation of the extension portion 32 and the attachment portion 33, a notched constriction may be formed in a part of the cover member 30. That is, by forming a constriction in a part of the cover member 30, the strength of the constriction can be weakened, so that the extension portion 32 and the attachment portion 33 can be easily bent. In this case, it is desirable to reduce the effect on the main portion 31 caused by providing the constriction. For example, it is preferable to form a notched constriction on the surface of the main portion 31 side at the connecting portion between the extension portion 32 and the attachment portion 33 in the cover member 30 (the connecting portion between the outer extension portion 32a and the inner extension portion 32b). By forming a constriction in this portion, it is possible to make the extension portion 32 and the attachment portion 33 easy to bend while reducing the effect on the main portion 31.

[0192] As described above, in the LED lighting device 3 according to this embodiment, the contact portion 32c of the extension portion 32 of the cover member 30 is in contact with and pressed against the main plate portion 21 of the frame 20. This configuration provides the following advantages.

[0193] If the contact portion 32c of the extension portion 32 of the cover member 30 is not in contact with the main plate portion 21 of the frame 20 in a pressed state, a gap may be generated between the tip of the extension portion 32 of the cover member 30 and the main plate portion 21 of the frame 20 due to dimensional variations in the cover member 30 and / or the frame 20. As a result, foreign objects such as insects and dust may enter the space region S2 through this gap. In addition, if the contact portion 32c of the extension portion 32 of the cover member 30 is not in contact with the main plate portion 21 of the frame 20 in a pressed state, when the cover member 30 is fitted into the frame 20 from the width direction, the extension portion 32 may be deformed in a direction in which the tip of the extension portion 32 moves away from the frame 20, and a gap may be generated between the tip of the extension portion 32 of the cover member 30 and the main plate portion 21 of the frame 20. As a result, foreign objects such as insects and dust may enter the space region S2 through this gap.

[0194] On the other hand, in the LED lighting device 3 according to the present embodiment, the third plate portion 32b3, which is the tip of the extension portion 32, becomes the abutment portion 32c and abuts against the main plate portion 21 of the frame 20 in a pressed state. As a result, the abutment portion 32c of the extension portion 32 of the cover member 30 and the main plate portion 21 of the frame 20 do not separate, so that even if the cover member 30 and / or the frame 20 have dimensional variations, it is possible to suppress the occurrence of a gap between the tip of the extension portion 32 and the frame 20. In other words, it is possible to absorb the dimensional variations of the cover member 30 and / or the frame 20. In this way, in the LED lighting device 3 according to the present embodiment, no gap occurs between the tip of the extension portion 32 of the cover member 30 and the main plate portion 21 of the frame 20, so that it is possible to suppress the intrusion of foreign objects such as insects and dust into the spatial region S2. In other words, the extension portion 32 abutting against the main plate portion 21 of the frame 20 functions as an insect-proof structure.

[0195] In particular, since the cover member 30 and the frame 20 are long and exceed 2 feet, warping, undulation, twisting, and the like are likely to occur in the frame 20 and / or the cover member 30. In particular, some LED lighting devices 3 are 8 feet long, and when the cover member 30 and the frame 20 are 8 feet long, warping, and the like are even more likely to occur in the frame 20 and / or the cover member 30. For this reason, in conventional LED lighting devices, partial gaps are likely to occur between part of the tip of the extension portion 32 and the frame 20 in the longitudinal direction of the cover member 30, and it may not be possible to maintain linearity in the area where the extension portion 32 is desired to contact along the longitudinal direction of the cover member 30.

[0196] In contrast, in the LED lighting device 3 according to this embodiment, the third plate portion 32b3, which is the tip end of the extension portion 32, serves as the abutment portion 32c and is pressed against the main plate portion 21 of the frame 20. This makes it possible to prevent a gap from being generated between the tip end of the extension portion 32 and the frame 20 over the entire length of the cover member 30 in the longitudinal direction.

[0197] Furthermore, when the LED lighting device 3 is attached to the fixture body 2 or when the LED lighting device 3 is cleaned or replaced, the LED lighting device 3 may be twisted or the main part 31 of the cover member 30 may be pressed, and stress may be applied to the LED lighting device 3, causing the pair of extension parts 32 to deform in the direction of opening. In other words, the extension parts 32 may be deformed in the direction in which the tip of the extension part 32 moves away from the frame 20. In this case, if foreign objects such as insects and dust are accumulated in the spatial region (corresponding to the spatial region S1 in this embodiment) between the extension parts 32 and the frame 20, the foreign objects may fall and enter the spatial region S2 (insect-proof region) between the cover member 30 and the frame 20.

[0198] In contrast, in the LED lighting device 3 according to this embodiment, the third plate portion 32b3, which is the tip end of the extension portion 32, serves as the abutment portion 32c and is pressed against the main plate portion 21 of the frame 20. As a result, even if stress is applied to the LED lighting device 3, no gap is generated between the tip end of the extension portion 32 and the frame 20. As a result, even if foreign objects such as insects and dust accumulate in the spatial region S1 between the extension portion 32 and the frame 20, the foreign objects can be prevented from falling and entering the spatial region S2 (insect-proof region) between the cover member 30 and the frame 20.

[0199] In this way, in the LED lighting device 3 according to this embodiment, the tip of the extension portion 32 of the cover member 30 can be kept in contact with the frame 20, thereby preventing foreign matter such as insects and dust from entering the spatial region S2 (insect-proof region) between the cover member 30 and the frame 20. Furthermore, the tip of the extension portion 32 of the cover member 30 comes into contact with the main plate portion 21 of the frame 20, thereby improving the efficiency of light extraction from the LED lighting device 3 to the floor side.

[0200] Furthermore, in the LED lighting device 3 according to this embodiment, the third plate portion 32b3 (contact portion 32c) which is the tip end of the extension portion 32 contacts the surface of the main plate portion 21 which is a flat surface.

[0201] This increases the contact area between the tip of the extension portion 32 and the main plate portion 21 of the frame 20, thereby further preventing foreign objects such as insects and dust from entering the space area S2 between the cover member 30 and the frame 20.

[0202] In the LED lighting device 3 according to this embodiment, the extension portion 32 has an outer extension portion 32a.

[0203] With this configuration, when the LED lighting device 3 is lifted by the elastic holding member 6 (kick spring) to store the LED lighting device 3 in the fixture body 2, a force is applied to press the extension portion 32 against the ceiling, and the outer extension portion 32a of the extension portion 32 abuts against the opening edge 2a1 of the recess 2a of the fixture body 2. As a result, the inner extension portion 32b of the extension portion 32 presses further against the frame 20, so that the force with which the extension portion 32 presses against the main plate portion 21 of the frame 20 increases. This improves the degree of adhesion between the extension portion 32 and the main plate portion 21. This further prevents foreign objects such as insects and dust from entering the space region S2 between the cover member 30 and the frame 20. In other words, the insect-proofing effect can be improved. Furthermore, the LED lighting device 3 is lifted by the elastic holding member 6, so that the outer extension portion 32a of the extension portion 32 and the opening edge 2a1 of the recess 2a of the fixture body 2 can be brought into close contact with each other.

[0204] In the present embodiment, the third plate portion 32b3 of the extension portion 32 of the cover member 30 abuts against the main plate portion 21 of the frame 20 in a pressed state, but this is not limited thereto. Specifically, as shown in FIG. 15, the third plate portion 32b3 of the extension portion 32 of the cover member 30 may abut against the light source unit 10 in a pressed state. That is, it is sufficient that the third plate portion 32b3 (abutment portion 32c) of the extension portion 32 abuts against at least one of the frame 20 and the light source unit 10 in a pressed state. In FIG. 15, the third plate portion 32b3 (abutment portion 32c) of the extension portion 32 abuts against the surface of the substrate 11 of the light source unit 10.

[0205] In this manner, the third plate portion 32b3, which is the tip portion of the extension portion 32, serves as the abutment portion 32c and is pressed against the light source unit 10, thereby making it possible to prevent a gap from being generated between the tip portion of the extension portion 32 and the light source unit 10. Specifically, it is possible to prevent a gap from being generated between the tip portion of the extension portion 32 and the substrate 11. As a result, it is possible to maintain a state in which the tip portion of the extension portion 32 and the light source unit 10 are in contact with each other, making it possible to prevent foreign matter such as insects and dust from entering the spatial region S2 between the cover member 30 and the frame 20.

[0206] Moreover, by pressing the tip of the extension part 32 against the light source part 10, the extension part 32 can prevent the light source part 10 from coming off, and can effectively dissipate heat generated by the light source part 10. Also, by positioning the extension part 32 close to the substrate 11 of the light source part 10, the light extraction efficiency can be improved. This can increase the luminous flux of the illumination light emitted from the LED lighting device toward the floor side, thereby improving the illuminance directly below the LED lighting fixture. Therefore, when multiple LED lighting fixtures are installed, the number of LED lighting fixtures installed can be reduced.

[0207] Here, the configuration of the end cap 40 and the elastic member 50 in the LED lighting device 3 according to the present embodiment will be described in more detail with reference to Figs. 1 to 10 and Figs. 16 to 20. Fig. 16 is a perspective view of the end cap 40 according to the embodiment when viewed from the outer surface 41b side. Fig. 17 is a perspective view of the end cap 40 according to the embodiment when viewed from the inner surface 41a side. In Fig. 16, (b) shows a perspective view of a half cross section of the end cap 40. Fig. 18 is a cross-sectional view of the LED lighting device 1 according to the embodiment. Fig. 19 is an enlarged view of an area IXX surrounded by a dashed line in Fig. 18. In Figs. 18 and 19, the end cap 40 that appears in the depth direction is also shown. Fig. 20 is an exploded perspective view of the part shown in Fig. 19.

[0208] As shown in Figures 5 and 16 to 20, the end cap 40 has a main portion 41, a fitting portion 42 for fitting the cover member 30, an inner protrusion portion 43 that protrudes inward from the main portion 41, and an outer protrusion portion 44 that protrudes outward from the main portion 41.

[0209] The main portion 41 is a cap main body that serves as the main body of the end cap 40, and mainly functions to cover the open end of a cylinder formed by the cover member 30 and the frame 20. In this embodiment, all or a part of the plate-shaped main portion 41 is translucent. In this manner, the main portion 41 having translucency allows light from the light source unit 10 to pass through. In other words, the light emitted from the LEDs 12 of the light source unit 10 passes through the main portion 41 and is extracted to the outside of the end cap 40.

[0210] Specifically, the end cap 40 is entirely translucent. Therefore, the entire main portion 41 and the entire fitting portion 42 are translucent. The translucent end cap 40 may be transparent or may have diffusive properties. By using the translucent and diffusive end cap 40, the light of the LED 12 incident on the end cap 40 is diffused (scattered) by the end cap 40 and passes through the end cap 40.

[0211] The end cap 40 is made of a light-transmitting resin material such as acrylic or polycarbonate, or a light-transmitting material such as a glass material. In this embodiment, the end cap 40 is made of a light-transmitting resin material. In this case, the end cap 40 can be a diffusing member having a light diffusing material dispersed therein. Such an end cap 40 can be produced by resin molding a light-transmitting resin material mixed with a light diffusing material into a predetermined shape. As the light diffusing material, light-reflecting fine particles such as silica particles can be used.

[0212] The end cap 40 having translucency and diffusibility may be formed by forming a milky white light diffusion film containing a light diffusion material or the like on the surface (inner surface or outer surface) of a transparent end cap, instead of dispersing a light diffusion material inside. The end cap 40 may be configured to have light diffusion properties by performing a diffusion process, instead of using a light diffusion material. For example, the end cap 40 may be configured to have light diffusion properties by performing a surface treatment such as a graining process to form minute irregularities on the surface of the transparent end cap, or by printing a dot pattern on the surface of the transparent end cap. Even when the end cap 40 is subjected to a diffusion process, the end cap 40 may further contain a light diffusion material in order to enhance light diffusion properties.

[0213] The end cap 40 may be made of the same material as the cover member 30 or may be made of a material different from that of the cover member 30.

[0214] Furthermore, the main portion 41 may not be translucent. In this case, the entire end cap 40 may not be translucent. For example, an example of a non-translucent end cap 40 is one that has light blocking properties (light absorbing properties) or light reflecting properties. In this case, the end cap 40 is made of, for example, a white, black or colored resin material. Furthermore, the end cap 40 may have a translucent portion and a non-translucent portion.

[0215] The shape of the main part 41 in a front view is, for example, a flattened kamaboko shape as a whole. Therefore, the outer shape of one side of the main part 41 in the Z-axis direction is curved in an arc shape so as to follow the shape of the cover member 30. The thickness of the plate-shaped main part 41 is constant. As an example, the thickness of the main part 41 is 1 mm to 5 mm, but is not limited to this. Note that the thickness of the main part 41 is constant over the entire area of ​​the main part 41, but is not limited to this.

[0216] Moreover, the shape of the main part 41 in front view is, for example, a shape of a flattened semicircle as a whole. Therefore, the outer shape of one side of the main part 41 in the Z-axis direction is a curved shape curved like an arc so as to follow the shape of the cover member 30. In this embodiment, when viewed from the longitudinal direction of the LED lighting device 3, the end cap 40 is D-shaped as a whole. Specifically, when viewed from the longitudinal direction of the LED lighting device 3, the main part 41 is D-shaped as a whole. As described above, the side shape of the LED lighting device 1 consisting of the LED lighting device 3 and the device main body 2 is also D-shaped as a whole, and the boundary between the LED lighting device 3 and the device main body 2 is not noticeable.

[0217] The main part 41 has an inner side surface 41a and an outer side surface 41b as surfaces in the thickness direction of the main part 41. The inner side surface 41a is the surface on the light source unit 10 side (LED 12 side), and the outer side surface 41b is the surface on the opposite side to the light source unit 10 side (LED 12 side). The outer side surface 41b is an exposed surface that can be seen by a user. As described above, in this embodiment, the entire main part 41 has translucency, so that the light emitted from the LED 12 and entering the main part 41 passes through the entire main part 41. Therefore, the inner side surface 41a of the main part 41 is a light entrance surface where the light of the LED 12 enters, and the outer side surface 41b of the main part 41 is a light exit surface where the light of the LED 12 exits to the outside.

[0218] The main portion 41 is curved in a concave shape as a whole so as to be recessed inward. As an example, the inner side surface 41a and the outer side surface 41b of the main portion 41 are parabolic. That is, the inner side surface 41a and the outer side surface 41b are curved in each of the X-axis direction and the Z-axis direction. In this embodiment, the main portion 41 is generally inclined so that the upper portion (ceiling side portion) is recessed inward from the lower portion (floor side portion) in the height direction which is the Z-axis direction, and has a curved shape as a whole so that the central portion is recessed inward from the peripheral portions in the width direction which is the X-axis direction.

[0219] The main part 31 of the cover member 30 is attached to the inner side surface 41a of the main part 41. Therefore, the inner side surface 41a of the main part 41 includes a mounting surface 41c, which is a surface to which the cover member 30 is attached. In this embodiment, the mounting surface 41c is a surface to which the main part 31 of the cover member 30 is attached. Specifically, the longitudinal end of the main part 31 of the cover member 30 is attached to the mounting surface 41c. Therefore, the end face of the longitudinal end of the main part 31 of the cover member 30 abuts against the mounting surface 41c. The mounting surface 41c and the longitudinal end of the main part 31 of the cover member 30 are fixed by an adhesive. Therefore, an adhesive may be interposed between the mounting surface 41c and the end face of the longitudinal end of the main part 31 of the cover member 30. In this way, the mounting surface 41c is a connection surface to which the longitudinal end of the main part 31 of the cover member 30 is directly or indirectly connected. In addition, the mounting surface 41c includes not only the surface against which the longitudinal end of the main portion 31 of the cover member 30 abuts, but also the same plane as the surface against which the longitudinal end of the main portion 31 of the cover member 30 abuts.

[0220] 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 in the main portion 41. Specifically, the fitting portion 42 is provided in the end of the main portion 41 on the floor side. The fitting portion 42 is a protruding portion protruding from the inner surface 41a of the main portion 41. The fitting portion 42 is provided in the end of the main portion 41 on the floor side (the side opposite to the side of the instrument body 2). Specifically, the fitting portion 42 is formed in a curved portion of the outer periphery of the main portion 41. That is, the fitting portion 42 is formed in a portion corresponding to the main portion 31 of the cover member 30. 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 so as 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.

[0221] In the curved portion on the outer periphery of the main portion 41, the mounting surface 41c is between the fitting portion 42 and the edge of the main portion 41. In other words, the mounting surface 41c includes the area between the fitting portion 42 and the outer periphery 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.

[0222] It is not necessary for the longitudinal end of the main portion 31 of the cover member 30 to be in contact with the fitting portion 42. For example, a ring-shaped packing member may be disposed 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.

[0223] The fitting portion 42 has a first continuous portion 42a and a second continuous portion 42c that are formed continuously along the shape of the outer peripheral edge of the curved portion of the main portion 41, and a discontinuous portion 42b that is not formed continuously along the shape of the outer peripheral edge of the curved portion of the main portion 41.

[0224] The first continuous portion 42a is located on the apex side of the curved portion of the end cap 40, and the second continuous portion 42c is located on the base side of the curved portion of the end cap 40. In other words, the second continuous portion 42c is located on the end end 46 side, which is the end portion located most outside of the end cap 40. The length of the first continuous portion 42a is longer than the length of the second continuous portion 42c.

[0225] 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 (toward the main plate portion 21). Specifically, the discontinuous portion 42b is recessed so as to be bent in an L-shape.

[0226] The height of the protrusion constituting the discontinuous portion 42b and the height of the protrusion constituting the first continuous portion 42a may be the same or different. For example, the height of the protrusion constituting the discontinuous portion 42b may be lower than the height of the protrusion constituting the first continuous portion 42a.

[0227] Further, a recess 41c1 is formed in the mounting surface 41c adjacent to the discontinuous portion 42b. The recess 41c1 is located between the first continuous portion 42a and the second continuous portion 42c, and is formed along the opening of the fitting portion 42 that is recessed by forming the discontinuous portion 42b. The recess 41c1 is a bottomed hole that is recessed in part of the mounting surface 41c. In this embodiment, the recess 41c1 is formed in an elongated shape that follows the shape of the outer circumferential edge of the main portion 41.

[0228] The inner protrusion 43 is a protrusion that protrudes from the inner side surface 41a of the main portion 41 (cap main body). The inner protrusion 43 protrudes inward in the longitudinal direction of the cover member 30 (the Y-axis direction).

[0229] The inner protrusion 43 is composed of a plurality of protrusion pieces. In this embodiment, the end cap 40 has a first protrusion piece 43a, a second protrusion piece 43b, a third protrusion piece 43c, and a fourth protrusion piece 43d as the inner protrusion 43. The inner protrusion 43 is formed integrally with the main portion 41. Specifically, the first protrusion piece 43a, the second protrusion piece 43b, the third protrusion piece 43c, and the fourth protrusion piece 43d are all formed integrally with the main portion 41.

[0230] The first protruding piece 43a is a main plate portion-facing protruding piece that faces the main plate portion 21 of the frame 20. Specifically, when the LED 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). The first protruding piece 43a also 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. There is a gap between the first protruding piece 43a and the main plate portion 21.

[0231] The first protruding piece 43a is provided at an end portion on the ceiling side (the fixture body 2 side) of the main part 41. Specifically, the first protruding piece 43a is provided on a straight portion of the outer periphery of the main part 41.

[0232] The first protruding piece 43a is provided between a pair of extension parts 32 in the cover member 30. Specifically, the first protruding piece 43a is located between the third plate part 32b3 of one of the pair of extension parts 32 and the third plate part 32b3 of the other extension part 32. A gap exists between the first protruding piece 43a and the pair of third plate parts 32b3, and the first protruding piece 43a and the pair of third plate parts 32b3 are not in contact with each other. The first protruding piece 43a and the pair of third plate parts 32b3 may be in contact with each other.

[0233] The first protruding piece 43a overlapping the main plate portion 21 in the Z-axis direction functions as an overlapping portion between the end cap 40 and the frame 20. That is, the end cap 40 fixed to the end of the cover member 30 moves in the Y-axis direction due to the thermal expansion difference between the frame 20 and the cover member 30 when the LED lighting device 3 is turned on, but by providing the first protruding piece 43a overlapping the main plate portion 21 of the frame 20 on the end cap 40, the thermal expansion difference between the frame 20 and the cover member 30 can be absorbed. That is, even if the cover member 30 and the frame 20 thermally expand when the LED lighting device 3 is turned on, the end cap 40 and the frame 20 maintain a state of overlapping in the Z-axis direction. Also, by providing the first protruding piece 43a, even if the frame 20 is shifted from a predetermined position and shifted to one side, the end cap 40 and the frame 20 overlap in the Z-axis direction. This makes it possible to suppress the occurrence of a gap between the end cap 40 and the frame 20 in the Z-axis direction, and therefore to prevent foreign matter such as insects and dust from entering through the gap.

[0234] In addition, considering that the cover member 30 and the end cap 40 thermally expand when the LED lighting device 3 is turned on, it is preferable that there is 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, foreign objects such as insects and dust may enter the spatial region S2 between the cover member 30 and the frame 20, so it is preferable that this gap is as small as possible. In addition, even if the cover member 30 thermally expands and the cover member 30 and the frame 20 are shifted to one side, it is preferable that the first protruding piece 43a and the main plate unit 21 overlap. This makes it possible to prevent foreign objects such as insects and dust from entering. In addition, it is preferable that the main part 31 of the cover member 30 and the main part 41 of the end cap 40 do not push against each other even if the cover member 30 thermally expands.

[0235] The second protruding piece 43b is an extension portion facing protruding piece that faces the extension portion 32 of the cover member 30. Specifically, when the LED 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 part of the second protruding piece 43b faces the third plate portion 32b3 of the extension portion 32 in the X-axis direction. There is a gap between the second protruding piece 43b and the extension portion 32. In addition, the second protruding piece 43b extends in a direction intersecting with the main surface of the main plate portion 21. Specifically, the second protruding piece 43b extends linearly in the Z-axis direction.

[0236] In the present embodiment, the second protruding piece 43b is connected to the first protruding piece 43a. Specifically, the second protruding piece 43b extends from each of both 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.

[0237] The third protruding piece 43c faces the main plate portion 21 of the frame 20. Specifically, when the LED 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).

[0238] In addition, the third protruding piece 43c is not only a main plate portion facing protruding piece that faces the main plate portion 21 of the frame 20, but also an extension portion facing 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 can prevent foreign objects 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.

[0239] Similar to the first protruding piece 43a, the third protruding piece 43c is provided at the end of the main part 41 on the ceiling side (the fixture body 2 side). Specifically, the third protruding piece 43c is provided on a straight portion of the outer periphery of the end cap 40 (main part 41).

[0240] Moreover, the third protruding piece 43c is provided on the outer side of the first protruding piece 43a in the X-axis direction. That is, the third protruding piece 43c and the first protruding piece 43a are arranged side by side. However, in this embodiment, the ceiling side end face of the third protruding piece 43c is located closer to the ceiling side 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 part of the ceiling side protrudes from the edge of the end part of the main part 41 on the side of the fixture body 2 (ceiling side). Moreover, 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.

[0241] In this embodiment, the third protruding piece 43c is provided on both sides of the first protruding piece 43a. That is, two third protruding pieces 43c are provided on the main portion 41. 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. The third plate portion 32b3 of the extension portion 32 of the cover member 30 is inserted into this gap.

[0242] The fourth protruding piece 43d is an extension portion facing protruding piece that faces the extension portion 32 of the cover member 30. Specifically, when the LED 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 the second plate portion 32b2 (inclined plate portion) of the extension portion 32. In this embodiment, the fourth protruding piece 43d extends so as to be inclined along the second plate portion 32b2 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.

[0243] The fourth protruding piece 43d is provided at a position where it can come into contact with the extended portion 32. Specifically, a gap exists between the fourth protruding piece 43d and the extended portion 32, and the fourth protruding piece 43d does not come into contact with the extended portion 32. However, when the extended portion 32 is bent or deformed, 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 and suppress deformation of the extended portion 32. Note that the wall portions constituting the first continuous portion 42a, the second continuous portion 42c, and the discontinuous portion 42b in the fitting portion 42 may also serve as the fourth protruding piece 43d to hold the extended portion 32 and suppress deformation of the extended portion 32.

[0244] 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 an 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.

[0245] Moreover, 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.

[0246] The outer protrusion 44 is a protruding piece protruding from the outer surface 41b of the main portion 41 (cap body). The outer protrusion 44 protrudes outward in the longitudinal direction (Y-axis direction) of the cover member 30. By making the outer protrusion 44 protrude in a convex shape from the main portion 41, the thickness of the end cap 40 can be increased in the portion where the outer protrusion 44 is provided. In this embodiment, the outer protrusion 44 is formed integrally with the main portion 41.

[0247] The heights (protruding amounts 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, 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, 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 (i.e., only the fourth protruding piece 43d may be shorter).

[0248] 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 may protrude from a position offset from the mounting surface 41c depending on the shape of the main portion 41. 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 may protrude from a position inside the mounting surface 41c. The first protruding piece 43a, the second protruding piece 43b, the third protruding piece 43c, and the fourth protruding piece 43d may protrude from positions different from each other in the Y-axis direction.

[0249] In addition, 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.

[0250] The outer protrusion 44 is provided at the end of the main part 41 on the ceiling side (the fixture body 2 side). Therefore, the outer protrusion 44 protrudes outward from the end of the main part 41 on the fixture body 2 side.

[0251] The outer protrusion 44 overlaps the opening edge 2a2, which is the appliance body end of the appliance body 2. Specifically, the outer protrusion 44 overlaps the opening edge 2a2 (appliance body end) in the Z-axis direction. In this embodiment, the outer protrusion 44 is provided in a protruding shape across the entire width of the end of the main part 41 on the appliance body 2 side, and the outer protrusion 44 overlaps the opening edge 2a2 across the entire length of the appliance body 2 in the short side direction (X-axis direction).

[0252] Since the outer protrusion 44 overlaps the opening edge 2a2 (the fixture body end) of the fixture body 2 in the Z-axis direction, the gap between the end cap 40 and the opening edge 2a2 is covered by the outer protrusion 44. As a result, even when the LED lighting fixture 1 installed on the ceiling is viewed from an oblique direction or directly below (Z-axis direction), the inside of the LED lighting fixture 1 is difficult to see through the gap between the end cap 40 and the opening edge 2a2. Therefore, the appearance of the LED lighting fixture 1 can be improved, and an LED lighting fixture 1 with excellent design can be realized. Note that, even if the cover member 30 thermally shrinks when the light is turned off, it is preferable that the outer protrusion 44 overlaps the opening edge 2a2 of the fixture body 2.

[0253] As described above, the fitting portion 42, the inner protrusion 43, and the outer protrusion 44 are integrally formed with the main portion 41. In this case, the main portion 41, the fitting portion 42, the inner protrusion 43, and the outer protrusion 44 may be made of two or more types of resin materials. For example, the outer protrusion 44 may be transparent or white, and the parts other than the outer protrusion 44 may be milky white. By making the outer protrusion 44 transparent or milky white, the outer protrusion 44 can be made translucent. This allows the light of the LED 12 to enter the outer protrusion 44 and cause the outer protrusion 44 to emit light. In addition, by making the outer protrusion 44 white, the outer protrusion 44 can be made opaque. This makes it possible to make the outer protrusion 44 less noticeable. In particular, by making the color of the outer protrusion 44 the same as the color of the frame 20 or the fixture body 2, the outer protrusion 44 can be made less noticeable. The end cap 40 having partially different resin materials in this way can be formed by two-color molding.

[0254] A recess 45 is formed at the end of the end cap 40 on the ceiling side (the fixture body 2 side). The recess 45 is a bottomed hole in which a part of the inner surface of the end cap 40 is recessed. In this embodiment, the recess 45 is formed by cutting out a straight line portion that is the edge of the end of the main part 41 on the ceiling side so as to create a step in the straight line portion. The recess 45 is formed so as to set back a part of the inner surface 41a of the main part 41 in the thickness direction of the main part 41.

[0255] The recessed portion 45 is formed near the end end 46, which is the end located most outside of the end cap 40. The recessed portion 45 is also formed at a position corresponding to the protruding portion 20b of the frame 20. Therefore, a pair of recessed portions 45 is provided corresponding to the pair of protruding portions 20b. Specifically, the pair of recessed portions 45 are provided at positions symmetrical to the left and right. Although the details will be described later, each of the pair of protruding portions 20b of the frame 20 is fitted into each of the pair of recessed portions 45. Therefore, the size of the recessed portion 45 in a plan view is large enough to fit the protruding portion 20b.

[0256] An elastic member 50 is attached to the end cap 40. That is, the elastic member 50 is integral with the end cap 40. In this embodiment, the elastic member 50 is attached to the end cap 40 by integral molding. This eliminates the need for a separate operation for fixing the elastic member 50 to the end cap 40, improving the ease of assembly. Note that the elastic member 50 may be attached to the end cap 40 by a fixing member such as an adhesive to a separately manufactured end cap 40, instead of being attached to the end cap 40 by integral molding.

[0257] The elastic member 50 is attached to the end of the end cap 40 on the ceiling side. In the present embodiment, the elastic member 50 is attached to the inner protruding portion 43. Specifically, the elastic member 50 is attached and fixed to the first protruding piece 43a. More specifically, the elastic member 50 is attached to a portion of the first protruding piece 43a on the main plate portion 21 side (the portion on the fixture body 2 side).

[0258] The elastic member 50 is an elastic body made of a resin material or the like, and is elastically deformed. In the present embodiment, the elastic member 50 is made of an elastomer. As an example, the elastic member 50 is made of silicone rubber and has rubber elasticity. Note that the elastic member 50 made of an elastomer is not limited to a solid molded product, and may be a foam molded product.

[0259] The elastic member 50 has a first elastic portion 51 provided between the main plate portion 21 of the frame 20 and the inward protrusion portion 43 of the end cap 40, and a second elastic portion 52 provided between the extension portion 32 of the cover member 30 and the inward protrusion portion 43 of the end cap 40.

[0260] The first elastic portion 51 is provided between the main plate portion 21 of the frame 20 and the first protruding piece 43a of the inner protruding portion 43. Specifically, the first elastic portion 51 is sandwiched between the main plate portion 21 and the first protruding piece 43a, and is provided so as to fill the gap between the main plate portion 21 and the first protruding piece 43a. Since the main plate portion 21 extends in the X-axis direction, the first elastic portion 51 also extends in the X-axis direction. In this embodiment, the first elastic portion 51 is formed in a thin plate shape. The thin plate-shaped first elastic portion 51 is disposed in the gap between the first protruding piece 43a and the main plate portion 21 of the frame 20 in an inclined state.

[0261] The second elastic portion 52 is provided between the extension portion 32 of the cover member 30 and the second protruding piece 43b of the inner protruding portion 43. Specifically, the second elastic portion 52 is sandwiched between the third plate portion 32b3 of the extension portion 32 and the second protruding piece 43b, and is provided so as to fill the gap between the third plate portion 32b3 of the extension portion 32 and the second protruding piece 43b.

[0262] In this way, by not only providing a first elastic portion 51 between the main plate portion 21 of the frame 20 and the first protruding piece 43a, but also providing a second elastic portion 52 between the extension portion 32 of the cover member 30 and the second protruding piece 43b, the first elastic portion 51 and the second elastic portion 52 function as a gasket member and not only seal the gap between the main plate portion 21 of the frame 20 and the end cap 40 (the gap in the Z-axis direction), but also seal the gap between the extension portion 32 of the cover member 30 and the end cap 40 (particularly the gap in the X-axis direction).

[0263] With this configuration, even if gaps are generated between the cover member 30, the frame 20, and the end cap 40 due to dimensional variations or warping, undulation, twisting, etc., in the cover member 30, the frame 20, and the end cap 40, the gaps can be blocked by the elastic member 50. In addition, even if gaps are generated between the cover member 30, the frame 20, and the end cap 40 due to distortion of the outer shapes of the cover member 30, the frame 20, and the end cap 40 from a predetermined shape in the manufacturing process and assembly process of the parts, or due to external force when the LED lighting device 1 is installed, the gaps can be blocked by the elastic member 50. In other words, the gaps generated between the cover member 30, the frame 20, and the end cap 40 can be absorbed by the elastic member 50. Therefore, it is possible to suppress the intrusion of foreign objects such as insects and dust into the spatial region S2 (insect-proof region) between the cover member 30 and the frame 20. In other words, the insect-proof effect can be maintained.

[0264] Furthermore, since the elastic member 50 having rubber elasticity is inserted in the contact portion between the frame 20 and the end cap 40, it is possible to reduce abnormal noise that occurs when the cover member 30 is thermally shrunk in the longitudinal direction.

[0265] The first elastic portion 51 of the elastic member 50 is preferably provided on the first protruding piece 43a closer to the inside of the cover member 30 in the Y-axis direction. This allows the elastic member 50 to maintain its insect-repellent effect even if the end cap 40 moves in the Y-axis direction due to a difference in thermal expansion between the cover member 30 and the frame 20 when the LED lighting device 3 is turned on. Furthermore, by providing the first elastic portion 51 on the first protruding piece 43a closer to the inside of the cover member 30, the first elastic portion 51 can be kept away from the opening edge 2a2 (the opening edge of the recess 2a) and the first elastic portion 51 can be kept away from the outer protruding portion 44 of the end cap 40. This prevents the elastic member 50 from being seen through the gap between the opening edge 2a2 and the end cap 40.

[0266] The color of the elastic member 50 is arbitrary. For example, the color of the elastic member 50 may be transparent, milky white, or white. This makes it possible to make the elastic member 50 less noticeable. The color of the elastic member 50 may be black. This allows the elastic member 50 to be formed of an inexpensive material. In this way, the elastic member 50 may be transparent or milky white, or may be opaque, not having light transmittance, such as white or black. The elastic member 50 may be white or milky white, or light absorbing, such as black. The milky white elastic member 50 not only scatters and transmits light, but also scatters and reflects light.

[0267] In the present embodiment, the elastically deformable elastic member 50 is configured to contact the first projecting piece 43a and the second projecting piece 43b, but this is not limiting. For example, the elastic member 50 may also be configured to contact the fourth projecting piece 43d. Also, an elastic member (elastomer, etc.) other than the elastic member 50 may be provided to contact the third projecting piece 43c or the fourth projecting piece 43d, or may be provided to contact the frame 20. That is, a plurality of elastic members may be provided on the end cap 40. In this case, the elastically deformable elastic member may be provided between the third projecting piece 43c and the extension part 32 of the cover member 30, or may be provided between the third projecting piece 43c and the frame 20. This can prevent insects from entering the spatial region S1, and therefore can further prevent insects from entering the spatial region S2 into which insects are really not allowed. Also, the elastically deformable elastic member may be provided between the fourth projecting piece 43d and the extension part 32 of the cover member 30. By bringing an elastic member into contact with the fourth protruding piece 43d, the tip of the extension portion 32 can be more reliably brought into contact with the main plate portion 21 of the frame 20. This can further inhibit insects from entering the spatial region S2.

[0268] In the present embodiment, the elastic member 50 is provided on the end cap 40, but this is not limiting. For example, the elastic member 50 may be provided on the frame 20 or the opening edge 2a2 (apparatus body end). The elastic member 50 may not be provided. In this case, it is preferable that the gap between the end cap 40 and the frame 20 is as small as possible. In addition, when the elastic member 50 is not provided, the first protruding piece 43a of the end cap 40 may not be in contact with the main plate portion 21 of the frame 20, but may be in contact. By making the first protruding piece 43a and the main plate portion 21 non-contact, abnormal noise caused by contact between the members can be reduced. In addition, by making the first protruding piece 43a and the main plate portion 21 contact each other, an insect repellent effect can be obtained without providing the elastic member 50.

[0269] The end cap 40 thus configured is fixed to the cover member 30. The end cap 40 and the cover member 30 can be fixed together by, for example, bonding with an adhesive. A method for bonding the end cap 40 and the cover member 30 together using an adhesive will be described with reference to Fig. 21. Fig. 21 is a diagram for explaining a method for bonding the end cap 40 and the cover member 30 together.

[0270] As shown in (a) of FIG. 21, first, liquid adhesive 80 is applied to the outer wall surface of fitting portion 42 of end cap 40. For example, liquid adhesive 80 is applied by dripping it onto three locations on the outer wall surface of fitting portion 42. Since fitting portion 42 is curved along the shape of the outer peripheral edge of end cap 40, liquid adhesive 80 applied to fitting portion 42 flows downward along the outer wall surface of fitting portion 42. As a result, adhesive 80 wets and spreads over the outer wall surface of fitting portion 42, and adhesive 80 can be applied to a predetermined position of fitting portion 42.

[0271] 21(b), the cover member 30 is fitted into the end cap 40. Specifically, the longitudinal end of the main part 31 of the cover member 30 is fitted into the fitting part 42 of the end cap 40 so that the longitudinal end of the main part 31 of the cover member 30 and the mounting surface 41c of the end cap 40 abut against each other.

[0272] At this time, as shown in FIG. 21(a), the second elastic portion 52 of the elastic member 50 attached to the end cap 40 has a triangular overhang 52a, so that the extension portion 32 of the cover member 30 moves along this overhang 52a. In this manner, the overhang 52a of the second elastic portion 52 functions as a guide portion that guides the extension portion 32 of the cover member 30 to a predetermined position of the end cap 40. This allows the end cap 40 and the cover member 30 to be easily fitted together, improving the ease of assembly of the cover member 30 and the end cap 40. In addition, by providing the overhang 52a to the second elastic portion 52, the bonding strength between the second elastic portion 52 and the end cap 40 can be increased, so that the second elastic portion 52 can be prevented from peeling off or being torn off from the end cap 40.

[0273] After the cover member 30 is fitted into the end cap 40, the adhesive 80 is solidified. For example, if the adhesive 80 is an ultraviolet curing resin, the adhesive 80 is cured and solidified by irradiating it with ultraviolet light. Also, if the adhesive 80 is a thermosetting resin, the adhesive 80 is cured and solidified by heating or natural drying. As the adhesive 80 solidifies, the end cap 40 and the cover member 30 are fixed together.

[0274] At this time, in this embodiment, since the elastic member 50 is attached to the end cap 40, when the cover member 30 is fitted into the end cap 40 to which the liquid adhesive 80 has been applied, the end cap 40 can be temporarily held to the cover member 30 by friction caused by the elastic member 50 until the adhesive 80 hardens. Specifically, the end cap 40 can be temporarily held to the cover member 30 by the second elastic portion 52 between the extension portion 32 of the cover member 30 and the second protruding piece 43b of the end cap 40. By temporarily holding the end cap 40 in this manner, the ease of assembly between the end cap 40 and the cover member 30 can be improved.

[0275] Next, the fixing portions between the cover member 30 and the end cap 40 thus fixed will be described.

[0276] In this embodiment, the main portion 31 and the extension portion 32 of the cover member 30 are fixed to the end cap 40 or not. Specifically, the main portion 31 of the cover member 30 is fixed to the end cap 40, but at least the tip portion of the extension portion 32 of the cover member 30 is not fixed to the end cap 40. This allows at least the tip portion of the extension portion 32 to move, so that the extension portion 32 can be pressed against the main plate portion 21 of the frame 20.

[0277] This configuration can absorb dimensional variations and warping, swell, twisting, etc. of the cover member 30, the frame 20, and the end cap 40, and can prevent foreign objects such as insects and dust from entering the space region S2 (insect-proof region) between the cover member 30 and the frame 20. In other words, even if dimensional variations or warping, swell, twisting, etc. occur in the cover member 30, the frame 20, and the end cap 40, at least the tip of the extension portion 32 moves and bends, so that the extension portion 32 can maintain a state of being pressed against the main plate portion 21 of the frame 20. Therefore, the insect-proof effect of the extension portion 32 can be maintained, and the invasion of foreign objects such as insects and dust into the space region S2 between the cover member 30 and the frame 20 can be prevented.

[0278] In the present embodiment, the longitudinal end of the main portion 31 of the cover member 30 is fixed to the mounting surface 41c of the main portion 41 of the end cap 40. On the other hand, with respect to the extension portion 32 that abuts against the frame 20 while being pressed against the frame 20, the entire inner extension portion 32b of the extension portion 32 is not fixed to the end cap 40.

[0279] This configuration allows the extension portion 32 to have a larger movable range, which can better absorb dimensional variations in the cover member 30, the frame 20, and the end caps 40. This further maintains the insect-repellent effect of the extension portion 32.

[0280] Moreover, by not fixing the extension portion 32 of the cover member 30, the number of assembly steps can be reduced, and the amount of adhesive used for fixing can also be reduced. Furthermore, by making the extension portion 32 movable, the attachment portion 33 (leg portion) of the cover member 30 also bends inward, making it possible to make the cover member 30 less likely to come off.

[0281] In this embodiment, the outer extension 32a of the extension 32 is fixed to the end cap 40, but it does not have to be fixed to the end cap 40. This allows the movable range of the extension 32 to be further increased, thereby enhancing the insect repellent effect of the extension 32 and making it even more difficult for the cover member 30 to come off.

[0282] In the present embodiment, the mounting portion 33 (leg portion) of the cover member 30 is not in contact with the end cap 40, but the mounting portion 33 and the end cap 40 may be in contact with each other. However, whether the mounting portion 33 and the end cap 40 are in contact with each other or not, it is better that the mounting portion 33 and the end cap 40 are not fixed to each other. By not fixing the mounting portion 33 and the end cap 40 in this manner, when the cover member 30 is fitted into the frame 20 as shown in FIG. 13, not only the extension portion 32 but also the mounting portion 33 bends, so that the cover member 30 can be easily fitted into the frame 20. The mounting portion 33 and the end cap 40 may be fixed to each other.

[0283] Next, the bonding portion between the main portion 31 of the cover member 30 and the end cap 40 will be described. As shown in FIG. 19, 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 FIG. 19, a bonding region P1 (region surrounded by a broken line indicated by a length A) where the main portion 31 and the end cap 40 are bonded, and a non-bonding region P2 (region surrounded by a broken line indicated by a length B) where the main portion 31 and the end cap 40 are not bonded are formed at the joint portion between the main portion 31 of the cover member 30 and the end cap 40. This point will be described with reference to FIG. 22. FIG. 22 is a diagram showing a state in which the adhesive 80 applied to the fitting portion 42 of the end cap 40 flows along the outer wall surface of the fitting portion 42.

[0284] The adhesive 80 applied to the fitting portion 42 of the end cap 40 flows along the outer wall surface of the fitting portion 42, as indicated by the dashed arrow in Fig. 22. At this time, since the fitting portion 42 has a discontinuous portion 42b formed by recessing a portion of the fitting portion 42, it is possible to prevent the adhesive 80 applied to the first continuous portion 42a of the fitting portion 42 from flowing toward the mounting surface 41c and the second continuous portion 42c on the end end portion 46 side (downstream side) of the discontinuous portion 42b.

[0285] Specifically, the adhesive 80a of the adhesive 80 applied to the first continuous portion 42a that reaches the discontinuous portion 42b flows along the wall surface of the recessed discontinuous portion 42b and remains in the discontinuous portion 42b. Even if the adhesive 80a flows downstream of the discontinuous portion 42b, the adhesive 80a flows along the bottom (root) of the discontinuous portion 42b to the upper wall side of the discontinuous portion 42b (the near side in FIG. 22), allowing the adhesive 80a to escape. This makes it possible to prevent the adhesive 80 applied to the first continuous portion 42a from reaching the mounting surface 41c and the second continuous portion 42c that are closer to the end end portion 46 than the discontinuous portion 42b.

[0286] In this embodiment, the mounting surface 41c is provided with a recess 41c1 along the opening of the recessed fitting portion 42 by forming the discontinuous portion 42b. As a result, the adhesive 80b of the adhesive 80 applied to the first continuous portion 42a that flows from the discontinuous portion 42b toward the mounting surface 41c is retained at the opening edge of the recess 41c1 due to the surface tension of the opening edge of the recess 41c1. Even if the adhesive 80b exceeds the opening edge of the recess 41c1, the adhesive 80b can be drawn into the recess 41c1. In this way, the recess 41c1 can prevent the adhesive 80b from exceeding the recess 41c1 and reaching the mounting surface 41c.

[0287] It is preferable that the slit-shaped recess 41c1 is formed at a position where a part of the slit width direction overlaps with the main part 31 of the cover member 30, and another part of the slit width direction does not overlap with the main part 31 of the cover member 30. This makes it easier for the adhesive 80 to flow into the recess 41c1, and prevents the adhesive 80 from flowing into the attachment surface 41c that becomes the non-bonding region P2.

[0288] Furthermore, in this embodiment, the height of the end of the first continuous portion 42a on the discontinuous portion 42b side is lower than the height of the other portions. This causes the adhesive 80c that reaches the end of the first continuous portion 42a on the discontinuous portion 42b side to flow toward the upper part of the wall (the front side of FIG. 22). In other words, the adhesive 80c can be allowed to escape so as not to reach the discontinuous portion 42b.

[0289] In this manner, according to the structure of the fitting portion 42 of the end cap 40 in this embodiment, the adhesive 80 applied to the first continuous portion 42a of the fitting portion 42 can be interrupted at the discontinuous portion 42b to cut off the edge. As a result, it is possible to prevent the adhesive 80 from flowing to the mounting surface 41c and the second continuous portion 42c on the end end portion 46 side (downstream side) of the discontinuous portion 42b. Specifically, it is possible to prevent the adhesive 80 from reaching the second continuous portion 42c.

[0290] As a result, when the main portion 31 of the cover member 30 and the end cap 40 are joined and fixed to each other with the adhesive 80, the main portion 31 and the end cap 40 are fixed to each other in a portion corresponding to the first continuous portion 42a of the fitting portion 42, but the main portion 31 and the end cap 40 are not fixed to each other in 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 portion 31 are fixed to each other, but the discontinuous portion 42b and the second continuous portion 42c of the fitting portion 42 and the main portion 31 are not fixed to each other. 19, a fixed region P1 where the main portion 31 and the first continuous portion 42a of the fitting portion 42 are fixed to each other, and a non-fixed region P2 where the main portion 31 and the discontinuous portion 42b and the second continuous portion 42c are not fixed to each other are formed at the joint between the main portion 31 of the cover member 30 and the end cap 40. 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.

[0291] From the viewpoint of forming the fixed region P1 and the non-fixed region P2, it is sufficient that the fitting portion 42 is provided with the first continuous portion 42a and the non-continuous portion 42b. In other words, the second continuous portion 42c does not necessarily have to 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, so that the shape of the cover member 30 can be stabilized and the cover member 30 can be positioned by suppressing the displacement of the cover member 30 in the width direction. In addition, the extension portion 32 of the cover member 30 can be supported by the second continuous portion 42c, and the extension portion 32 can be suppressed from cracking.

[0292] Here, the effect of the presence of the fixed region P1 and the non-fixed region P2 at the joint between the main portion 31 of the cover member 30 and the end cap 40 will be described in comparison with the end cap 40x of the comparative example with reference to Figures 23 and 24. Figure 23 is a diagram showing the configuration of the end cap 40x of the comparative example. Figure 24 is a diagram showing how the cover member 30 is attached to the frame 20 when the end cap 40x of the comparative example is used and when the end cap 40 according to the present embodiment is used.

[0293] 23, in the end cap 40x of the comparative example, the fitting portion 42x does not have a discontinuous portion, and the fitting portion 42x is formed continuously up to the vicinity of the end edge 46 along the shape of the outer circumferential edge of the curved portion of the main portion 41. In the end cap 40x of the comparative example, the first protruding piece 43ax, the second protruding piece 43bx, and the fourth protruding piece 43dx are connected, and the fitting portion 42x is also connected to the first protruding piece 43ax, the second protruding piece 43bx, and the fourth protruding piece 43dx.

[0294] When the end cap 40x and the cover member 30 thus configured are bonded together with the adhesive 80, the adhesive 80 applied to the fitting portion 42x of the end cap 40x flows along the outer wall surface of the fitting portion 42x to the vicinity of the end end portion 46, and then flows onto the mounting surface 41c of the entire curved portion of the main portion 41. Furthermore, the adhesive 80 flows around to the location of the fourth protruding piece 43dx that faces the extension portion 32 of the cover member 30. Therefore, not only are the end cap 40x and the main portion 31 of the cover member 30 fixed to each other so that the main portion 31 does not move, but the end cap 40x and the extension portion 32 of the cover member 30 are fixed to each other so that the extension portion 32 does not move either.

[0295] Therefore, when the cover member 30 to which the end cap 40x of the comparative example is fixed is attached to the frame 20, the extension portion 32 does not move, so that only the mounting portion 33 is bent outward to fit the cover member 30 into the frame 20, as shown by the dashed line in Fig. 24(a). In this case, the amount of deformation of the mounting portion 33 increases, and the cover member 30 may crack or deform. For example, stress may concentrate at the connection portion (the base portion of the mounting portion) between the main portion 31 and the mounting portion 33 of the cover member 30, causing the connection portion between the main portion 31 and the mounting portion 33 to crack.

[0296] In particular, when the length of the side plate portion 24 (extension portion) of the frame 20 is shortened in accordance with the strength required for the length of the LED lighting device 3, the length of the mounting portion 33 of the cover member 30 is accordingly shortened. In this case, when attaching the cover member 30 to the frame 20, it is necessary to further deflect the mounting portion 33, and the deformation amount of the mounting portion 33 becomes even larger. As a result, the cover member 30 becomes even more susceptible to cracking and deformation.

[0297] In contrast, in the LED lighting device 3 of the present embodiment, the joint between the main part 31 of the cover member 30 and the end cap 40 includes a fixed region P1 where the main part 31 and the end cap 40 are fixed, and a non-fixed region P2 where the main part 31 and the end cap 40 are not fixed. This allows the main part 31 of the cover member 30 to move in the non-fixed region P2. Specifically, the main part 31 corresponding to the non-continuous part 42b and the second continuous part 42c of the fitting part 42, which are the non-fixed region P2, moves. Moreover, the non-fixed region P2 prevents the adhesive 80 applied to the end cap 40 from reaching a portion facing the extension part 32 of the cover member 30. This allows not only a part of the main part 31 to move in the width direction, but also the extension part 32 to move in the width direction.

[0298] Therefore, when the cover member 30 to which the end cap 40 of this embodiment is fixed is attached to the frame 20, a part of the main portion 31 and the extension portion 32 move in the width direction, so that not only the mounting portion 33 but also the part of the main portion 31 and the extension portion 32 together can be tilted outward and bent, as shown by the dashed line in (b) of Figure 24.

[0299] 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 into the frame 20, it is possible to increase the range of motion of the mounting portion 33 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 easy to mount the cover member 30 to the frame 20, improving assembly.

[0300] Furthermore, the ratio of height to width (width / height) of frame 20 is preferably equal to or greater than 5 and equal to or less than 20. This makes it possible to easily spread mounting portion 33 outward, making it easier to attach cover member 30 to frame 20, while also preventing cover member 30 from cracking when mounting portion 33 is spread.

[0301] 19, in the mounting surface 41c that follows the outline of the curved portion of the main portion 41 of the half end cap 40, if the length of the fixed region P1 is A and the length of the non-fixed region P2 is B, then the ratio of A to B (A / B) should be 2 or more and 10 or less. This makes it possible to easily attach the cover member 30 to which the end cap 40 is fixed to the frame 20 while making it difficult for the cover member 30 to come off the frame 20. The start position of the length B of the non-fixed region P2 (the end on the fixed region P1 side) should be located near the end of the frame 20 in the width direction or outside the end of the frame 20 in the width direction.

[0302] Furthermore, if the length of the folded-back portion of the contact portion 33a of the attachment portion 33 in the cover member 30 is C, and the total length of the length B of the non-fixed region P2 and the length of the side plate portion 24 of the frame 20 is D, then the ratio of D to C (D / C) should be equal to or greater than 3 and equal to or less than 10. This makes it possible to both suppress cracking of the cover member 30 and make it difficult for the cover member 30 to come off the frame 20.

[0303] In the present embodiment, the discontinuous portion 42b is provided in the fitting portion 42 of the end cap 40, and the adhesive 80 is interrupted at the discontinuous portion 42b to cut the edge, but this is not limited to the above. For example, as shown in FIG. 25(b), a cutout portion 32a1 may be provided in the extension portion 32 of the cover member 30, and the adhesive 80 may be interrupted at the cutout portion 32a1. In FIG. 25(a), (a) is a cross-sectional view of the LED lighting device 3, and (b) is a rear view of only the cover member 30 in (a). In this modification, the cutout portion 32a1 of the extension portion 32 is formed to cut out the end portion of the outer extension portion 32a on the end cap 40 side, as shown in FIG. 25(b). In this way, by providing the cutout portion 32a1 in the outer extension portion 32a of the extension portion 32, when the end cap 40 to which the adhesive 80 is applied is fitted and fixed to the cover member 30, the adhesive 80 can be prevented from flowing around to the vicinity of the inner extension portion 32b of the extension portion 32. Therefore, the inner extension portion 32b of the extension portion 32 can be prevented from being fixed to the end cap 40. In order to maintain the insect repellent effect of the extension portion 32 while preventing the adhesive 80 from flowing around, it is preferable that the depth (length in the Y-axis direction) of the cutout portion 32a1 is equal to or less than the height of the protruding piece 43e covering the extension portion 32. The protruding piece 43e is connected to the second protruding piece 43b and the fitting portion 42.

[0304] In the present embodiment, the discontinuous portion 42b of the fitting portion 42 of the end cap 40 is a part of the protruding portion constituting the fitting portion 42, but is not limited thereto. Specifically, as shown in (a) to (d) of FIG. 26, the discontinuous portion 42b of the fitting portion 42 may be a divided portion (gap) in which a part of the fitting portion 42 is divided. In this case, the discontinuous portion 42b, which is a divided portion, may be present at a position corresponding to the curved portion of the main portion 41 of the end cap 40, as shown in (a) and (b) of FIG. 26. In addition, in (a) of FIG. 26, the discontinuous portion 42b is located closer to the apex side of the curved portion of the main portion 41 than the connecting portion between the main portion 31 and the mounting portion 33 of the cover member 30. In (b) of FIG. 26, the discontinuous portion 42b is located at the connecting portion between the main portion 31 and the mounting portion 33 of the cover member 30. Also, the discontinuous portion 42b, which is a dividing portion, may be present at a position corresponding to the extension portion 32 of the cover member 30, as shown in (c) and (d) of Fig. 26. As shown in (c) of Fig. 26, the discontinuous portion 42b, which is a dividing portion, may be present at a position corresponding to the outer end of the outer extension portion 32a of the extension portion 32, but as shown in (d) of Fig. 26, when the outer extension portion 32a is long, it may be present at a position corresponding to the center of the outer extension portion 32a. In this way, by changing the position of the discontinuous portion 42b (dividing portion) in the fitting portion 42, the relative lengths of the fixed region P1 and the non-fixed region P2 can be changed.

[0305] As described above, in the LED lighting device 3 of this embodiment, the cover member 30 and the end cap 40 are fixed to each other by the adhesive 80 to form the fixing region P1, but the adhesive 80 in the fixing region P1 may be present between the main part 31 of the cover member 30 and the fitting part 42 of the end cap 40 as shown in Fig. 27, or may be present between the longitudinal end face of the main part 31 of the cover member 30 and the mounting surface 41c of the end cap 40 as shown in Fig. 28, or may be present on both sides. In other words, the cover member 30 and the end cap 40 may be fixed to each other at the fitting part 42, or at the mounting surface 41c, or may be both.

[0306] In the above embodiment, the extension portion 32 of the cover member 30 is not fixed to the end cap 40. As a result, the tip of the extension portion 32 is pressed against the main plate portion 21 of the frame 20 while elastically deforming, so that even if there is component variation, warping, twisting, undulation, etc., the tip of the extension portion 32 comes into contact with the main plate portion 21, thereby preventing insects from entering the spatial region S2. Note that the extension portion 32 of the cover member 30 and the end cap 40 may be fixed to each other. In this case, the adhesive 80 that fixes the cover member 30 and the end cap 40 to each other is present between the extension portion 32 of the cover member 30 and the fitting portion 42 of the end cap 40. Specifically, the adhesive 80 that bonds the cover member 30 and the end cap 40 may be present between the outer extension portion 32a of the extension portion 32 and the fitting portion 42 as shown in Fig. 29, or may be present between the inner extension portion 32b of the extension portion 32 and the fitting portion 42 as shown in Fig. 30, or may be present in both cases. That is, a part of the extension portion 32 and a part of the fitting portion 42 may be bonded together. However, even when the extension portion 32 and the end cap 40 are bonded together, it is preferable to bond the extension portion 32 and the fitting portion 42 without bonding the tip portion of the extension portion 32 so that the tip portion of the extension portion 32 can move.

[0307] In the present embodiment, the cover member 30 and the end cap 40 are fixed to each other by the adhesive 80, but the present invention is not limited thereto. For example, the cover member 30 and the end cap 40 may be fixed to each other by ultrasonic welding or laser welding. In this case, as in the end cap 40A shown in FIG. 31, a protruding rib 41c2 (linear rib) extending along the mounting surface 41c may be formed on the mounting surface 41c. The rib 41c2 may be formed over the entire curved portion of the main portion 41, for example, as shown by the dashed line in FIG. 32. The rib 41c2 may be formed not only on the curved portion of the main portion 41 but also up to a position corresponding to the extension portion 32, as shown by the dashed line in FIG. 33. However, in this case, it is preferable that the rib 41c2 is not formed up to a position corresponding to the third plate portion 32b3, which is the tip of the extension portion 32, so that the tip of the extension portion 32 can move.

[0308] In this way, by forming the rib 41c2 on the mounting surface 41c of the end cap 40A, the cover member 30 and the end cap 40A can be fixed to each other by melting the rib 41c2 with ultrasonic waves or a laser. That is, the rib 41c2 is a fusion rib. The cross-sectional shape of the rib 41c2 is, for example, an approximately isosceles triangle. In this case, the rib 41c2 has, for example, a height of 0.25 mm, a width at the base of 0.4 mm, and a radius of curvature R of the arc at the apex of 0.05 mm.

[0309] In the end cap 40A shown in Figs. 32 and 33, the rib 41c2 is a linear rib extending linearly, but is not limited thereto. For example, as in the end cap 40A shown in Figs. 34 and 35, the rib 41c2 may be a dot rib formed in a dot-like distribution. In this case, the dot-like rib 41c2 may be formed over the entire curved portion of the main portion 41 as shown in Fig. 34, or may be formed not only in the curved portion of the main portion 41 but also in a position corresponding to the extension portion 32 as shown in Fig. 35. However, in this case, it is better not to form the rib 41c2 at a position corresponding to the third plate portion 32b3, which is the tip of the extension portion 32, so that the tip of the extension portion 32 can move.

[0310] In this manner, in the above embodiment, the extension portion 32 of the cover member 30 and the end cap 40 are in surface contact, but as shown in Figs. 31 to 33, by using an end cap 40A on which the rib 41c2, which is a linear rib, is formed, the extension portion 32 of the cover member 30 and the end cap 40A are in line contact. Also, as shown in Figs. 34 and 35, by using an end cap 40A on which the rib 41c2, which is a point rib, is formed, the extension portion 32 of the cover member 30 and the end cap 40A are in point contact. However, from the viewpoint of insect repelling effect, it is better for the extension portion 32 and the end cap 40 to be in surface contact or line contact rather than point contact, and further, it is better for the extension portion 32 and the end cap 40 to be in surface contact rather than line contact.

[0311] The method of bonding the cover member 30 and the end cap 40 is not limited to adhesive (solvent), ultrasonic welding, or laser welding. For example, the cover member 30 and the end cap 40 may be bonded to each other by heat caulking, hot pressing, heat welding, or an adhesive such as double-sided tape.

[0312] Next, the joint portion between the frame 20 and the end cap 40 in the LED lighting device 3 according to this embodiment will be described using Figs. 36 and 37 while also referring to Figs. 17 and 20. Figs. 36 and 37 are cross-sectional views of the LED lighting device 3 taken along a plane passing through the recessed portion 45 of the end cap 40 in the YZ plane. Fig. 36 is a perspective view of the cross section, and Fig. 37 is a side view of the cross section.

[0313] As shown in FIG. 17, the end cap 40 has a recessed portion 45. As shown in FIG. 20, the recessed portion 45 overlaps at least a part of the protruding portion 20b of the frame 20 when viewed from the longitudinal direction (Y-axis direction) of the frame 20. Specifically, the recessed portion 45 overlaps with the horizontal plate portion 23 constituting the protruding portion 20b when viewed from the longitudinal direction of the frame 20. In this embodiment, since the horizontal plate portion 23 has an inclined plate portion, the recessed portion 45 overlaps with the inclined plate portion constituting the horizontal plate portion 23. Furthermore, the recessed portion 45 also overlaps with the standing plate portion 22 constituting the protruding portion 20b when viewed from the longitudinal direction of the frame 20. In this embodiment, the recessed portion 45 overlaps with the entire protruding portion 20b in the longitudinal direction of the frame 20, but is not limited thereto, and may overlap with 50% or more of the protruding portion 20b. Furthermore, even if the cover member 30 is thermally shrunk, the pitch of the recesses 45 of the pair of end caps 40 should be greater than the overall length of the frame 20 in the longitudinal direction.

[0314] 36 and 37, the recess 45 is formed by recessing a part of the inner surface 41a of the main portion 41 of the end cap 40 in the thickness direction of the main portion 41. Also, the recess 45 is formed by cutting out a straight portion that is the end portion on the ceiling side of the end cap 40 so as to create a step at the edge of the straight portion. The protruding portion 20b of the frame 20 fits into the recess 45 of the end cap 40. Specifically, the entire protruding portion 20b of the frame 20 (the height of the protruding portion 20b) fits into the recess 45.

[0315] This configuration makes it possible to prevent the frame 20 from coming off the end cap 40 even if the cover member 30, the frame 20, and the end cap 40 vary in size or are warped, swollen, twisted, or the like. In other words, it is possible to prevent the frame 20 from coming off the cover member 30 to which the end cap 40 is fixed. In particular, by restricting the position of the protrusion 20b formed on the frame 20 to increase its strength by the recess 45, it is possible to maintain the high strength of the frame 20.

[0316] In addition, the recessed portion 45 is formed by recessing the inner surface 41a of the thick main portion 41, so that the bottom of the recessed portion 45 is thick. This makes it possible to prevent the strength of the end cap 40 from decreasing even when the recessed portion 45 is formed in the main portion 41, and therefore makes it possible to effectively prevent the frame 20 from coming off the end cap 40 (cover member 30).

[0317] As shown in FIG. 20 , the recess 45 does not overlap the main plate 21 and the side plate 24 of the frame 20 in the longitudinal direction of the frame 20, but it may overlap the main plate 21 or may overlap both the main plate 21 and the side plate 24.

[0318] When attaching the frame 20 to the cover member 30 to which the end cap 40 having the recessed portion 45 formed therein is fixed, as shown in (a) and (b) of Figure 38, the frame 20 is moved in the Z-axis direction so that the protruding portion 20b faces the recessed portion 45 of the end cap 40, thereby fitting the protruding portion 20b into the recessed portion 45. This allows the frame 20 to be aligned by the recessed portion 45, thereby improving the ease of assembly when attaching the frame 20 to the cover member 30.

[0319] 39, the inner surface of the recess 45 on the longitudinal side of the frame 20 may be inclined. Specifically, the inner surface of the recess 45 may be a forward tapered inclined surface. This makes it easier to align the frame 20 when attaching the frame 20 to the cover member 30. Note that the inner surface of the recess 45 on the longitudinal side of the frame 20 may be a curved surface instead of an inclined surface.

[0320] Note that the inner surface of the recess 45 on the short side of the frame 20 may be inclined or curved, instead of the inner surface of the recess 45 on the long side of the frame 20. This makes it easier to align the frame 20 when attaching the frame 20 to the cover member 30. Alternatively, both the inner surface of the recess 45 on the long side and the inner surface on the short side of the frame 20 may be inclined or curved.

[0321] 40, the extension portion 32 of the cover member 30 may extend from the mounting portion 33 instead of extending from the main portion 31. In this case, the extension portion 32 does not have the outer extension portion 32a, and has only the inner extension portion 32b. This configuration makes it easier to bend the mounting portion 33, and therefore, as shown in (a) and (b) of FIG. 40, when the protrusion 20b of the frame 20 is fitted into the recessed portion 45 of the end cap 40, the recessed portion 45 makes it easier to align the frame 20, and the cover member 30 and the frame 20 can be easily fitted together.

[0322] In a cross section (cross sections in Figs. 36 and 37) cut along a plane passing through the recessed portion 45 of the end cap 40, the outer protrusion 44 of the end cap 40, the opening end of the opening edge 2a2 (instrument body end) of the instrument body 2, the recessed portion 45 of the end cap 40, the end of the frame 20, the end of the cover member 30, and the third protrusion piece 43c of the end cap 40 are located in this order along the Y-axis direction. In a cross section (cross section in Fig. 5) cut along a plane passing through the center of the end cap 40, the outer protrusion 44 of the end cap 40, the opening end of the opening edge 2a2 (instrument body end) of the instrument body 2, the end of the frame 20, the end of the cover member 30, and the third protrusion piece 43c are located in this order along the Y-axis direction. In addition, the position of the end of the frame 20 and the position of the end of the cover member 30 may be reversed.

[0323] Next, modified examples of the fourth projecting piece 43d of the inner projecting portion 43 of the end cap 40 will be described with reference to FIGS.

[0324] In the LED lighting device 3 in the above embodiment, the fourth protruding piece 43d of the end cap 40 is not connected to the fitting portion 42, but this is not limited thereto. Specifically, as in the end cap 40B of the LED lighting device 3B shown in FIG. 41, the fourth protruding piece 43d may be connected to the fitting portion 42. In this case, the entire extension portion 32 of the cover member 30 is covered by the fourth protruding piece 43d and the fitting portion 42. In FIG. 41, the fourth protruding piece 43d is connected to the discontinuous portion 42b of the fitting portion 42, but this is not limited thereto.

[0325] In the LED lighting device 3 in the above embodiment, the fourth protruding piece 43d of the end cap 40 is connected to the second protruding piece 43b, but this is not limited thereto. Specifically, like an end cap 40C of an LED lighting device 3C shown in FIG. 42, the fourth protruding piece 43d may not be connected to the second protruding piece 43b. That is, the fourth protruding piece 43d may be separated from the second protruding piece 43b. Also, as shown in FIG. 42, the fourth protruding piece 43d may be composed of a plurality of pieces scattered in an island shape. In FIG. 42, the fourth protruding piece 43d is composed of two plate-shaped members.

[0326] When the fourth protruding piece 43d is separated from the second protruding piece 43b, the fourth protruding piece 43d may be a dot-shaped protrusion protruding from the inner surface 41a of the main part 41 of the end cap 40C, as shown in Fig. 43. As shown in Fig. 43, the fourth protruding piece 43d consisting of a protrusion is provided at a position overlapping the extension part 32 of the cover member 30 in the vertical direction when the LED lighting device 3C is attached to the fixture body 2 installed on the ceiling, similar to the fourth protruding piece 43d in the above embodiment. Also in this modification, the extension part 32 of the cover member 30 is sandwiched between the third protruding piece 43c and the fourth protruding piece 43d consisting of a protrusion in the vertical direction.

[0327] In addition, in FIG. 43, the fourth protruding piece 43d made of a protrusion is provided in a plurality of discontinuous portions. Specifically, two fourth protruding pieces 43d are provided between the second protruding piece 43b and the fitting portion 42. The fourth protruding piece 43d made of a protrusion may be provided only one, not multiple. In addition, in FIG. 43, the fourth protruding piece 43d made of a protrusion is not in contact with the extension portion 32, but may be in contact with the extension portion 32 as shown in FIG. 44. The fourth protruding piece 43d is preferably provided at a position where it can contact the extension portion 32. This allows the extension portion 32 to be supported by the fourth protruding piece 43d, so that deformation of the extension portion 32 due to excessive bending of the extension portion 32 can be suppressed, and the extension portion 32 can be suppressed from bending too much to reduce the insect repellent effect of the extension portion 32. Incidentally, the extension portion 32 may be in contact with the fourth protruding piece 43d at the same time that the tip portion comes into contact with the main plate portion 21 of the frame 20.

[0328] As shown in FIG. 43 and FIG. 44, the fourth protruding piece 43d of the end cap 40C is made into a dot-shaped protrusion, so that the fourth protruding piece 43d can be made discontinuous. This makes it possible to prevent the fourth protruding piece 43d from appearing as a shadow on the outer surface 41b of the main part 41 of the end cap 40C, even if the end cap 40C has translucency. This improves the appearance of the LED lighting device 3C and the LED lighting device, so that the LED lighting device 3C and the LED lighting device have excellent design. In addition, by making the fourth protruding piece 43d into a dot-shaped protrusion and making it discontinuous, the material cost of the end cap 40C can be reduced compared to the extended fourth protruding piece 43d.

[0329] The continuously extending fourth protruding piece 43d may have a plate-like shape as shown in (a) and (b) of Figure 45. In this case, as shown in (b) of Figure 45, a part of the plate-like member may be provided with a different height.

[0330] The shape of the fourth protruding piece 43d consisting of the dot-shaped protrusions can be the shapes shown in (c) to (k) of FIG. 45. Specifically, the fourth protruding piece 43d consisting of the dot-shaped protrusions may be columnar as shown in (c) to (e) of FIG. 45. In this case, the fourth protruding piece 43d may be a cylinder as shown in (c) of FIG. 45, a triangular prism as shown in (d) of FIG. 45, a hexagonal prism as shown in (e) of FIG. 45, or a prism of another polygonal shape (not shown). The fourth protruding piece 43d consisting of the dot-shaped protrusions may be a curved shape such as a hemisphere as shown in (f) of FIG. The fourth protruding piece 43d consisting of the dot-shaped protrusions may be a cone shape as shown in (g) to (k) of FIG. 45. In this case, the fourth protruding piece 43d may be a cone as shown in Figure 45(g), a triangular pyramid as shown in Figure 45(h), a truncated cone as shown in Figure 45(i), a truncated pyramid as shown in Figure 45(j), or a truncated cone formed so that the inclination angle changes along the way as shown in Figure 45(k).

[0331] The shape of the fourth protruding piece 43d consisting of dot-shaped protrusions may be a combination of a plurality of shapes shown in FIG. 45. For example, as shown in FIG. 46(a), the fourth protruding piece 43d consisting of dot-shaped protrusions may be a shape in which a cone having the same diameter as the cylinder is stacked on top of a cylinder. In this way, by making the base portion of the fourth protruding piece 43d pillar-shaped, as shown in FIG. 46(b), the extension portion 32 can be supported by the fourth protruding piece 43d, so that deformation of the extension portion 32 can be effectively suppressed. Furthermore, by making the tip portion of the fourth protruding piece 43d cone-shaped, as shown in FIG. 46(c), when combining the cover member 30 and the end cap 40, the fourth protruding piece 43d can function as a guide for fitting the extension portion 32 into a predetermined position of the end cap 40.

[0332] 45 and 46 may be applied to the inner protruding portion 43 other than the fourth protruding piece 43d. For example, the shapes shown in Fig. 45 and 46 may be applied to the first protruding piece 43a, the second protruding piece 43b, and the third protruding piece 43c.

[0333] 47, the fourth protruding piece 43d may be extended from the second protruding piece 43b and brought into contact with the extension portion 32. This makes it possible to prevent the extension portion 32 from being deformed by the fourth protruding piece 43d.

[0334] Furthermore, the fourth protruding piece 43d consisting of dot-shaped protrusions may have an elliptical shape in top view, as in the end cap 40E of the LED lighting device 3E in Fig. 48. In this case, it is preferable to form the fourth protruding piece 43d so that the major axis of the ellipse is in the vertical direction, as shown in Fig. 48. This makes it possible to reinforce the extension portion 32 in the direction in which force is applied when the fourth protruding piece 43d functions as a deformation prevention member, and therefore makes it possible to effectively suppress deformation of the extension portion 32.

[0335] Next, the relationship between the cover member 30 and the outer end of the end cap 40 in the LED lighting device 3 according to this embodiment will be described with reference to Fig. 49. Fig. 49 is an enlarged view of the outer end of the LED lighting device 3 in the LED lighting fixture 1 according to the embodiment shown in Figs. 1 to 11. The dashed line in Fig. 49 indicates the outline of the end cap 40.

[0336] 49, the cover member 30 has a cover end 31a that abuts against the recess 2a of the instrument body 2. In this embodiment, the cover end 31a is a part of the outer extension portion 32a of the extension portion 32.

[0337] The edge of the cover end 31a includes a first cover edge 31a1 which is the edge on the side of the fixture body 2 (the ceiling side) and a second cover edge 31a2 which is the edge in a direction parallel to the ceiling (parallel to the XY plane). The first cover edge 31a1 is a protruding portion of a part of the ceiling side surface of the cover end 31a. The second cover edge 31a2 is the tip portion of the cover end 31a in the Y-axis direction.

[0338] In this embodiment, the cover end 31a abuts against an opening edge 2a1, which is a flat portion located outside the recess 2a of the device body 2. Specifically, a first cover edge 31a1 at the cover end 31a abuts against the opening edge 2a1. The first cover edge 31a1 abutting against the opening edge 2a1 is located at the outermost position of the cover end 31a in the Y-axis direction.

[0339] 49, the end cap 40 has an end edge 46 which is the end located at the outermost side of the end cap 40. The edge of the end edge 46 includes a first end edge 46a which is the edge on the fixture body 2 side (ceiling side) and a second end edge 46b which is the edge in a direction parallel to the ceiling (direction parallel to the XY plane).

[0340] When viewed from the longitudinal direction (Y-axis direction) of the cover member 30, the edge of the cover end 31a is located outside the edge of the end end 46 of the end cap 40. In other words, the edge of the cover end 31a is located outside the edge of the end end 46 in both the X-axis direction and the Z-axis direction.

[0341] Specifically, when viewed from the longitudinal direction of the cover member 30, the first cover edge 31a1 is located closer to the fixture body 2 (ceiling side) than the first end edge 46a. In other words, in the width direction (Y-axis direction) of the cover member 30, the first end edge 46a is located closer to the floor side than the first cover edge 31a1.

[0342] When viewed in the longitudinal direction of the cover member 30, the second cover edge 31a2 is located outward from the second end edge 46b in the Y-axis direction. In other words, the first end edge 46a is located inward from the first cover edge 31a1 in the Y-axis direction.

[0343] The effect of the LED lighting device 3 thus configured will be described in comparison with an LED lighting device 3y of a comparative example with reference to Figs. 50 and 51. Fig. 50 is a diagram showing a state in which the cover member 30y and the end cap 40y are misaligned when assembled in the LED lighting device 3y of the comparative example. Fig. 51 is a diagram showing a state in which the cover member 30 and the end cap 40 are misaligned when assembled in the LED lighting device 3 of this embodiment.

[0344] In an LED lighting device 3y of a comparative example shown in FIG. 50, a cover end 31a of a cover member 30y and an end end 46 of an end cap 40y are designed to coincide with each other both in the ceiling side portion and in the width direction portion.

[0345] However, in the LED lighting device 3y of the comparative example, if the cover member 30y and the end cap 40y have dimensional variations or assembly variations, the cover member 30y and the end cap 40y may be assembled out of alignment, resulting in a gap between the cover end 31a of the cover member 30y and the fixture body 2. As a result, the LED lighting device 3y appears to be floating above the fixture body 2, degrading the appearance quality (design) of the LED lighting fixture. In addition, foreign objects such as insects and dust may enter the space (insect-proof area) between the cover member 30y and the frame 20 through the gap.

[0346] For example, as shown in FIG. 50(a), when the cover member 30y and the end cap 40y are assembled with a vertical (Z-axis) offset due to dimensional variations or assembly variations in the cover member 30y and the end cap 40y, when the end cap 40y becomes the outermost portion and abuts against the opening edge 2a1 of the fixture body 2, a gap is generated between the cover end 31a of the cover member 30y and the opening edge 2a1 of the fixture body 2. This gap exists over the longitudinal direction of the cover member 30y. This gap reduces the appearance quality of the LED lighting fixture. Note that even when the cover member 30y is offset to become the outermost portion, a gap is generated between the end cap 40y and the opening edge 2a1 of the fixture body 2.

[0347] Also, as shown in FIG. 50(b), when the cover end 31a of the LED lighting device 3y is in contact with the inclined surface portion 2a3 of the inner surface of the recess 2a of the fixture body 2, if the cover member 30y and the end cap 40y are combined with each other while being shifted in the width direction (Y-axis direction) due to dimensional variations or assembly variations in the cover member 30y and the end cap 40y, when the end cap 40y becomes the outermost portion and abuts against the inclined surface portion 2a3 of the fixture body 2, a gap will be generated between the cover end 31a of the cover member 30y and the inclined surface portion 2a3 of the fixture body 2. This gap will also exist over the longitudinal direction of the cover member 30y. This will result in a decrease in the appearance quality of the LED lighting fixture. Note that even if the cover member 30y is shifted to become the outermost portion, a gap will be generated between the end cap 40y and the inclined surface portion 2a3 of the fixture body 2.

[0348] In contrast, in the LED lighting device 3 of this embodiment, as described above, the edge of the cover end 31a is located outside the edge of the end end 46 of the end cap 40. Specifically, the first cover edge 31a1 of the cover end 31a is located closer to the fixture body 2 (ceiling side) than the first end edge 46a of the end end 46, and the second cover edge 31a2 of the cover end 31a is located outside the second end edge 46b of the end end 46 in the Y-axis direction.

[0349] With this configuration, as shown in FIG. 51(a), even if the cover member 30 and the end cap 40 are assembled with a vertical deviation (Z-axis direction) due to dimensional variations or assembly variations in the cover member 30 and the end cap 40, the cover end 31a of the cover member 30 is always the outermost part, so that the cover end 31a and the opening edge 2a1 of the fixture body 2 are kept in contact with each other. This makes it possible to prevent a gap from being generated between the cover end 31a of the cover member 30 and the opening edge 2a1 of the fixture body 2. As a result, it is possible to prevent a gap between the cover end 31a of the cover member 30 and the opening edge 2a1 of the fixture body 2 from deteriorating the appearance quality of the LED lighting fixture. In addition, by eliminating this gap, it is also possible to prevent foreign matter such as insects and dust from entering the spatial region S2 (insect-proof region) between the cover member 30 and the frame 20.

[0350] Also, as shown in (b) of FIG. 51, in the case where the cover end 31a of the LED lighting device 3 is in contact with the inclined surface portion 2a3 of the inner surface of the recess 2a of the fixture body 2, even if the cover member 30 and the end cap 40 are assembled with a shift in the width direction (Y-axis direction) due to dimensional variations or assembly variations in the cover member 30 and the end cap 40, the cover end 31a of the cover member 30 is always at the outermost edge, so that the cover end 31a and the inclined surface portion 2a3 of the fixture body 2 are maintained in contact with each other. This makes it possible to prevent a gap from being generated between the cover end 31a of the cover member 30 and the inclined surface portion 2a3 of the fixture body 2. As a result, it is possible to prevent a gap between the cover end 31a of the cover member 30 and the opening edge 2a1 of the fixture body 2 from deteriorating the appearance quality of the LED lighting fixture. Moreover, by eliminating this gap, it is possible to prevent foreign matter such as insects and dust from entering the spatial region S2 (insect-proof region) between the cover member 30 and the frame 20.

[0351] In addition, taking into consideration dimensional variations and assembly variations of the cover member 30 and the end cap 40, it is preferable that at least a portion of the thickness of the cover end 31a of the cover member 30 overlaps with the end cap 40 when viewed in the longitudinal direction (Y-axis direction) of the cover member 30.

[0352] In addition, in the cover member 30 of the LED lighting device 3 according to this embodiment, the extension portion 32 has the outer extension portion 32a, but this is not limited thereto. Specifically, as shown in Fig. 52, the extension portion 32 may be composed of only the inner extension portion 32b. In this case, a protrusion 34 protruding outward may be provided on the cover end portion 31a, and the tip of this protrusion 34 may be the second cover end edge 31a2. The protrusion 34 is a rib extending in the Y-axis direction.

[0353] 51(b), in the case where the cover end 31a is brought into contact with the inclined surface of the instrument body 2, even if there is dimensional variation or assembly variation in the cover member 30 and the end cap 40, the convex portion 34 of the cover end 31a can always be brought into contact with the instrument body 2. Note that, in FIG. 52, the convex portion 34 is provided at the connecting portion between the main portion 31 and the attachment portion 33, but this is not limiting.

[0354] In addition, the cross-sectional shape of the main part 31 of the cover member 30 is not limited to a curved shape. Specifically, as shown in Fig. 53, the cross-sectional shape of the main part 31 may be a polygon. In this case, as shown in Fig. 51(b), in the case of a mode in which the cover end 31a is abutted against the inclined surface of the instrument body 2, the convex part 34 of the cover end 31a can be always abutted against the instrument body 2 even if the cover member 30 and the end cap 40 have dimensional variations or assembly variations. In Fig. 53, the convex part 34 that becomes the cover end 31a is provided on the side surface of the main part 31, but is not limited thereto.

[0355] The protrusion 34 of the cover end 31a may be formed by changing the thickness of a part of the cover member 30 as shown in (a) of FIG. 54, or may be formed on one or both of the extension part 32 and the main part 31 as shown in (b) to (d) of FIG. 54. The shape of the protrusion 34 may be obliquely protruding as shown in (b) of FIG. 54. The protrusion 34 may be formed only on the extension part 32 as shown in (c) of FIG. 54, or may be formed on both the extension part 32 and the main part 31 as shown in (d) of FIG. 54. Note that, as shown in (e) of FIG. 54, a protrusion 34a (rib) may be provided on the extension part 32 in addition to the protrusion 34. The protrusion 34a is a rib for reducing noise generated by contact between the outer extension part 32a of the extension part 32 and the opening edge 2a1 of the device body 2. The protrusion 34 can also reduce abnormal noise caused by contact between the outer extension portion 32a of the extension portion 32 and the opening edge 2a1 of the device body 2. In other words, the provision of the protrusion 34 not only eliminates gaps and improves the appearance quality, but also reduces abnormal noise.

[0356] (Modification) Various modifications of the LED lighting device 3 according to the above embodiment will be described below.

[0357] In the LED lighting device 3 according to the above embodiment, the inner protrusion 43 of the end cap 40 is configured to have four protrusion pieces, namely, the first protrusion piece 43a, the second protrusion piece 43b, the third protrusion piece 43c and the fourth protrusion piece 43d, but this is not limited to this.

[0358] For example, like an end cap 40F of an LED lighting device 3F shown in Fig. 55, an inner protruding portion 43F may be configured to have three protruding pieces, a first protruding piece 43a, a second protruding piece 43b, and a third protruding piece 43c. In other words, the end cap 40F may not have the second protruding piece 43b.

[0359] Also, like an end cap 40G of an LED lighting device 3G shown in Fig. 56, an inner protruding portion 43G may be configured to have two protruding pieces, a first protruding piece 43a and a third protruding piece 43c. In other words, the end cap 40G may not have the second protruding piece 43b and the fourth protruding piece 43d.

[0360] Also, as in the end cap 40H of the LED lighting device 3H shown in FIG. 57, the inner protrusion 43H may be composed of a wide block-shaped first protrusion 43aH, a third protrusion 43c, and a fourth protrusion 43d. Since the first protrusion 43aH in this modification has a large width, it also has the function of the second protrusion 43b in the above embodiment. Therefore, the first protrusion 43aH in this modification not only faces the main plate 21 in the vertical direction, but also faces the extension 32 in the horizontal direction. As in the end cap 40H' of the LED lighting device 3H' shown in FIG. 58, the inner protrusion 43H' may be composed of the wide first protrusion 43aH and the third protrusion 43c without the fourth protrusion 43d.

[0361] Also, like an end cap 40I of an LED lighting device 3I shown in Fig. 59, the inner protrusion 43I may be configured to have a rectangular frame-shaped protrusion consisting of a first protrusion 43aI and a second protrusion 43b, a third protrusion 43c, and a fourth protrusion 43d. Note that, like an end cap 40I' of an LED lighting device 3I' shown in Fig. 60, the inner protrusion 43I' may be configured to have a rectangular frame-shaped protrusion consisting of a first protrusion 43aI and a second protrusion 43b, and a third protrusion 43c, without having the fourth protrusion 43d.

[0362] Also, like an end cap 40J of an LED lighting device 3J shown in Fig. 61, an inner protruding portion 43J may be configured to have three protruding pieces, a first protruding piece 43a, a second protruding piece 43b, and a fourth protruding piece 43d. In other words, the end cap 40J may not have a third protruding piece 43c.

[0363] 62, the third protruding piece 43cK of the inner protruding portion 43K may be present across the entire width of the spatial region S1 surrounded by the main plate portion 21 of the frame 20 and the extension portion 32 of the cover member 30. In other words, the width of the third protruding piece 43cK in the Y-axis direction may be substantially the same as the width of the spatial region S1 in the Y-axis direction.

[0364] Also, like the end cap 40L of the LED lighting device 3L shown in (a) of FIG. 63, the inner protruding portion 43L may be composed of a first protruding piece 43a, a second protruding piece 43b, a frame-shaped third protruding piece 43cL, and a fourth protruding piece 43d. The third protruding piece 43cL is configured to be surrounded by a plurality of plate surface parts. As shown in (b) of FIG. 63, the third protruding piece 43cL in this modification has a frame-shaped cylindrical shape with a mountain-shaped cross section, and has an outer shape that follows the inner shape of the space region S1 surrounded by the main plate part 21 of the frame 20 and the extension part 32 of the cover member 30. Although not shown, an elastic member such as an elastomer may be provided so as to surround the third protruding piece 43cL. Also, as shown in (c) of FIG. 63, the third protruding piece 43cL may not be frame-shaped, but may be divided into a plurality of pieces. For example, the third projecting piece 43cL may be composed of a plurality of unconnected plate pieces.

[0365] In the LED lighting device 3 according to the above embodiment, the fitting portion 42 of the end cap 40 has not only the first continuous portion 42a and the second continuous portion 42c formed continuously along the shape of the outer peripheral edge of the curved portion of the main portion 41, but also the discontinuous portion 42b not formed continuously along the shape of the outer peripheral edge of the curved portion of the main portion 41, but is not limited thereto. For example, as in the end cap 40M of the LED lighting device 3M shown in FIG. 64, the fitting portion 42M may not have a discontinuous portion not formed continuously along the shape of the outer peripheral edge of the curved portion of the main portion 41, but may be composed only of a continuous portion formed continuously along the shape of the outer peripheral edge of the curved portion of the main portion 41. In this case, as in the end cap 40M' of the LED lighting device 3M' shown in FIG. 65, the fitting portion 42M' consisting only of a continuous portion may be divided into a plurality of portions.

[0366] In the LED lighting device 3 according to the above embodiment, the frame 20 has the protruding portion 20b, but this is not limited thereto. For example, as in an LED lighting device 3N shown in Fig. 66, the frame 20N may be composed only of a main plate portion 21 and a side plate portion 24. In this case, as shown in Fig. 66, the extension portion 32N of the cover member 30N may be composed only of a flat plate parallel to the X-axis direction and may be in surface contact with the main plate portion 21.

[0367] In Fig. 66, the cover member 30N having the extension portion 32N made of only a flat plate is attached to the frame 20N having no protrusion 20b, but this is not limited to this. Specifically, as in the LED lighting device 30 shown in Fig. 67, the cover member 30 having the arch-shaped extension portion 32 used in the above embodiment may be attached to the frame 20N having no protrusion 20b.

[0368] Also, as in the LED lighting device 3P shown in FIG. 68, a cover member 30P having an extension portion 32P composed only of an inclined plate inclined with respect to the main plate portion 21 may be attached to a frame 20N in which a protrusion 20b is not formed. In this case, an end portion of a first protruding piece 43aP in an end cap 40P may overlap a tip portion of the extension portion 32P in the vertical direction. The end portion of the first protruding piece 43aP is formed in a triangular shape. Also, a second elastic portion 52P of an elastic member 50P exists between an end portion of the first protruding piece 43aP and a tip portion of the extension portion 32P. In FIG. 68, the end cap 40P is not provided with a third protruding piece 43c and a fourth protruding piece 43d.

[0369] In addition, when using a cover member 30P having an extension portion 32P composed only of an inclined plate, the thickness of the second elastic portion 52Q of the elastic member 50Q may be changed as in the LED lighting device 3Q shown in FIG. 69. For example, as shown in FIG. 69, the second elastic portion 52Q may be triangular. In this manner, the thickness of the second elastic portion 52Q does not have to be uniform. In FIG. 69, the end cap 40Q is not provided with the third protruding piece 43c and the fourth protruding piece 43d.

[0370] In the LED lighting device 3 according to the above embodiment, the second elastic portion 52, which is an elastic body provided between the second protruding piece 43b of the end cap 40 and the extension portion 32 of the cover member 30, is a part of the elastic member 50 attached to the end cap 40, but this is not limited thereto. For example, as in the LED lighting device 3R shown in FIG. 70, the elastic piece 35 located between the second protruding piece 43b of the end cap 40R and the extension portion 32 of the cover member 30R may be attached to the extension portion 32 of the cover member 30R. The elastic piece 35 inserted between the second protruding piece 43b and the extension portion 32 is an elastic body that elastically deforms, and has the same function as the second elastic portion 52 of the elastic member 50 in the above embodiment. The elastic piece 35 is made of, for example, an elastomer. In this modification, the elastic member 50R of the end cap 40R does not have the second elastic portion 52, and is made of only the first elastic portion 51.

[0371] 71, an elastically deformable elastic member 36 may be provided on the end face of the tip of the extension portion 32 of the cover member 30S. In this case, the elastic member 36 serves as the abutment portion 32c and is pressed against the frame 20. As a result, when the cover member 30S is attached to the frame 20, the elastic deformation of the elastic member 36 is added to the deflection of the extension portion 32, so that the adhesion between the extension portion 32 and the frame 20 can be improved. As an example, the elastic member 36 is an elastic body made of a resin material or the like, such as an elastomer.

[0372] If the elastic member 36 is provided, the extension portion 32 does not need to bend. In other words, when the cover member 30 is attached to the frame 20, only the elastic member 36 may be elastically deformed without the extension portion 32 being elastically deformed (i.e., without being bent). Even in this case, the elastic member 36 provided on the extension portion 32 and the frame 20 can be kept in contact with each other, so that it is possible to prevent foreign objects such as insects and dust from entering the spatial region S2 between the cover member 30 and the frame 20.

[0373] Also, as in the LED lighting device 3T shown in Fig. 72, an elastic member 36T provided on the end surface of the tip of the extension portion 32 of the cover member 30T may have an elastic piece 35T. The elastic member 36T in this modification is an integrated structure of the elastic member 36 in Fig. 71 and the elastic piece 35 in Fig. 70. Therefore, the LED lighting device 3T in this modification can achieve the effects of both the LED lighting device 3R shown in Fig. 70 and the LED lighting device 3S shown in Fig. 71. In this modification, the extension portion 32 does not need to bend as long as the elastic member 36T is provided.

[0374] In the case where the elastic member 36 is provided on the end face of the tip of the extension part 32 as in the LED lighting device 3S in FIG. 71, by making the width of the elastic member 36 larger than the width of the tip of the extension part 32 as shown in FIG. 73(a), the elastic member 36 can be stabilized and made difficult to be crushed. Also, by making the width of the tip of the elastic member 36 smaller than the width of the tip of the extension part 32 as shown in FIG. 73(b) and (c), the elastic member 36 can be easily bent while securing the crushing allowance of the elastic member 36. Also, by making the tip of the elastic member 36 tapered as shown in FIG. 73(d) and (e), the elastic member 36 can be easily collapsed to the left or right when the elastic member 36 presses the frame 20 while securing the crushing allowance of the elastic member 36. Also, by inclining the tip of the elastic member 36 in advance as shown in FIG. 73(f) to (h), the direction in which the elastic member 36 collapses when the elastic member 36 presses the frame 20 can be determined. That is, it is possible to specify the direction in which the elastic member 36 is inclined. The structure of the elastic member 36 shown in (a) to (h) of Figure 73 can also be applied to the elastic member 36T of Figure 72.

[0375] In the LED lighting device 3 according to the above embodiment, the discontinuous portion 42b of the fitting portion 42 of the end cap 40 is recessed so as to be bent at a right angle, but this is not limited thereto. For example, as in the end cap 40 shown in FIG. 74, the discontinuous portion 42b of the fitting portion 42 may be recessed to have an inclined portion 42b1. For example, the fitting portion 42 may be recessed so as to be bent in a V-shape. In this way, by providing the inclined portion 42b1 to the discontinuous portion 42b, it is possible to prevent the adhesive 80 that has flowed into the discontinuous portion 42b from flowing onto the mounting surface 41c. In other words, it is possible to prevent the adhesive 80 from flowing into the portion that should be the non-fixed region P2.

[0376] Alternatively, as in the end cap 40 shown in Fig. 75, the discontinuous portion 42b of the fitting portion 42 may be recessed so as to be curved. For example, the fitting portion 42 may be recessed so as to be bent in an arc shape. In this way, by curving the discontinuous portion 42b, the adhesive 80 that flows into the discontinuous portion 42b can be collected in the discontinuous portion 42b, and therefore, the adhesive 80 can be prevented from flowing onto the mounting surface 41c. In other words, the adhesive 80 can be prevented from flowing into the area that should be the non-fixed region P2.

[0377] Also, as in the end cap 40 shown in FIG. 76, the discontinuous portion 42b of the fitting portion 42 may extend linearly from the first continuous portion 42a toward the linear portion of the main portion 41 without being connected to the second continuous portion 42c. Alternatively, as in the end cap 40 shown in FIG. 77, the discontinuous portion 42b of the fitting portion 42 may be a gap (space region) between the first continuous portion 42a and the second continuous portion 42c. Thus, according to the end cap 40 shown in FIG. 76 and FIG. 77, a part of the fitting portion 42 is divided and cut off. This makes it possible to prevent the adhesive 80 from flowing into the area that should be the non-fixed area P2. Note that, by forming the discontinuous portion 42b with substance as in FIG. 76, the adhesive 80 can be guided and restricted along the discontinuous portion 42b, so that the adhesive 80 can be more prevented from flowing into the area that should be the non-fixed area P2 than the discontinuous portion 42b of the space region without substance (FIG. 77).

[0378] Also, as in the end cap 40 shown in FIG. 78, a protrusion 42a1 may be provided on the edge of the first continuous portion 42a of the fitting portion 42, or as in the end cap 40 shown in FIG. 79, a minute recess 42a2 may be provided on the end of the first continuous portion 42a of the fitting portion 42. This not only prevents the adhesive 80 from flowing to the non-continuous portion 42b and the second continuous portion 42c corresponding to the non-fixing region P2, but also allows the adhesive 80 to accumulate at the end of the first continuous portion 42a corresponding to the fixing region P1, thereby increasing the adhesive strength of the end of the fixing region P1. This prevents the end of the end cap 40 in the width direction from peeling off from the main portion 31 of the cover member 30 when the mounting portion 33 of the cover member 30 is expanded and attached to the frame 20. Also, as shown in FIG. 78, by providing the protrusion 42a1, dimensional variations of the cover member 30 and the end cap 40 can be absorbed. Although not shown, a protrusion 42a1 may be provided on the edge of the first continuous portion 42a of the fitting portion 42, and a recess 42a2 may be provided above the protrusion 42a1.

[0379] In addition, the first elastic portion 51 of the elastic member 50 in the LED lighting device 3 according to the above embodiment is attached to the flat portion of the straight portion of the main portion 41 of the end cap 40 as shown in (a) of FIG. 80, but is not limited thereto. Specifically, as shown in (b) of FIG. 80, the first elastic portion 51 of the elastic member 50 may be attached to the end cap 40 so as to engage with the convex portion 47a and the concave portion 47b provided on the straight portion of the main portion 41 of the end cap 40U. In this way, by providing the convex portion 47a and the concave portion 47b on the end cap 40, the contact area between the end cap 40 and the first elastic portion 51 is increased, so that the joining strength between the end cap 40 and the elastic member 50 can be increased. This makes it possible to prevent the elastic member 50 from coming off the end cap 40. Also, by providing the concave portion 47b, the volume of the first elastic portion 51 fitted into the concave portion 47b can be increased by the amount of the concave portion of the end cap 40. This makes it possible to improve the strength of the elastic member 50 itself. 80(b), the recess 47b is shaped as an undercut. This not only increases the contact area between the end cap 40 and the first elastic part 51 and further increases the bonding strength between the end cap 40 and the elastic member 50, but also allows the first elastic part 51 to be caught in the undercut part, so that even if the elastic member 50 is pulled or rubbed, it is possible to effectively prevent the elastic member 50 from coming off the end cap 40.

[0380] As shown in FIG. 80(b), in the elastic member 50 attached to the end cap 40U, the first elastic portion 51 has a body portion 51a which is a solid portion, and a plate-shaped (pleated) elastic piece 51b. By providing the body portion 51a to the first elastic portion 51, the first elastic portion 51 can be made to have a stiffness and be less likely to deform. On the other hand, the elastic piece 51b is a thin plate-shaped piece, and is shaped so as to easily collapse when pressed down. Therefore, when the cover member 30 to which the end cap 40 having the elastic member 50 is attached is fitted into the frame 20, the elastic piece 51b is pressed by the main plate portion 21 of the frame 20 and collapses. As a result, even if the frame 20, the cover member 30, and the end cap 40 have dimensional variations or assembly variations, causing variations in the gap between the end cap 40 and the main plate portion 21 of the frame 20 (see FIG. 5), the elastic piece 51b can absorb the variations in the gap by collapsing.

[0381] Moreover, since the first elastic portion 51 has not only the elastic piece 51b that is easily deformed but also the body portion 51a that is not easily deformed, the gap between the first protruding piece 43a of the end cap 40 and the main plate portion 21 of the frame 20 can be reliably filled by the first elastic portion 51. This makes it possible to effectively prevent foreign matter such as insects and dust from entering the spatial region S2 (insect-proof region) between the cover member 30 and the frame 20.

[0382] 80(b), a step may be formed on the outer surface 43a1 (the upper surface in the figure) of the first protruding piece 43a of the end cap 40 facing the frame 20. This allows the elastic piece 51b to escape to this step when it is pushed by the main plate 21 of the frame 20 and falls over. As a result, the contact pressure between the main plate 21 and the elastic piece 51b can be reduced, thereby reducing abnormal noise caused by contact between the main plate 21 and the elastic piece 51b.

[0383] Such a structure of the first elastic portion 51 and the first protruding piece 43a is not only possessed by the end cap 40U shown in Fig. 80(b), but also by the end cap 40 shown in Fig. 80(a). That is, also in the LED lighting device 3 in the above embodiment, the first elastic portion 51 of the elastic member 50 has a body portion 51a and an elastic piece 51b, and a step is formed on the outer surface 43a1 of the first protruding piece 43a of the end cap 40.

[0384] In addition, the main part 41 of the end cap 40 of the LED lighting device 3 according to the above embodiment has a parabolic shape curved in both the X-axis direction and the Y-axis direction, but is not limited to this. For example, as shown in (a) of FIG. 81, the main part 41 of the end cap 40 may be a flat plate that is neither inclined nor curved. For example, the main part 41 is a plate-like vertical plate parallel to the XZ plane. In this case, the main part 41 is oriented to stand vertically relative to the main plate part 21 of the frame 20. In addition, as shown in (b) of FIG. 81, the main part 41 of the end cap 40 may be an inclined plate that is inclined so that the part of the cover member 30 on the side of the main part 31 protrudes outward, or as shown in (c) of FIG. 81, the main part 41 of the end cap 40 may be a curved plate that is curved so that the part of the cover member 30 on the side of the main part 31 protrudes outward (the ceiling side part recedes inward). Also, as shown in (d) of FIG. 81, the main part 41 of the end cap 40 may be an inclined plate inclined so that the part on the main part 31 side of the cover member 30 protrudes inward (the part on the ceiling side recedes outward), or as shown in (e) of FIG. 81, the main part 41 of the end cap 40 may be a curved plate curved so that the part on the main part 31 side of the cover member 30 protrudes inward. Also, the main part 41 of the end cap 40 may be formed so as to protrude inward midway in the Z-axis direction as shown in (f) of FIG. 81, or may be formed so as to protrude outward midway in the Z-axis direction, although not shown. Note that in (a) to (f) of FIG. 81, the main part 41 does not have to be curved along the X-axis direction, but may be curved along the X-axis direction. That is, the main part 41 may be curved or inclined only in one axial direction, or may be curved or inclined in each of the two axial directions.

[0385] As shown in (g) and (h) of FIG. 81, the main part 41 of the end cap 40 may have a thickness-varying part with a different thickness. In this case, the thickness-varying part of the thickened main part 41 may have a rectangular cross-sectional shape as shown in (g) of FIG. 81, a triangular cross-sectional shape as shown in (h) of FIG. 81, or other shapes. As shown in (i) of FIG. 81, a prism may be formed on the inner surface of the main part 41 of the end cap 40. This makes it possible to control the distribution of light passing through the main part 41 when the main part 41 has translucency. The prism may be formed on the outer surface of the main part 41.

[0386] In addition, the end cap 40 of the LED lighting device 3 according to the above embodiment does not have a portion that exceeds the opening edge 2a2 (fixture body end) of the fixture body 2 in the Z-axis direction. However, as shown in (a) to (b) of FIG. 82, the end cap 40 may have a fixture-side protruding portion 49 as a portion that exceeds the opening edge 2a2 of the fixture body 2 in the Z-axis direction. The fixture-side protruding portion 49 is provided so as to protrude from a straight portion that is an end portion of the main portion 41 of the end cap 40 on the fixture body 2 side (ceiling side). The fixture-side protruding portion 49 is provided, for example, between a pair of extension portions 32 of the cover member 30. The fixture-side protruding portion 49 is connected to the first protruding piece 43a of the inner protruding portion 43. In this case, the fixture-side protruding portion 49 may be a part of the first protruding piece 43a. The fixture-side protruding portion 49 and the first protruding piece 43a may be provided separately. The instrument side protrusion 49 may extend only in the Z-axis direction as shown in (a) of Fig. 82, or may be bent so that its tip extends in the Z-axis direction as shown in (b) of Fig. 82. The instrument side protrusion 49 may be L-shaped so that its tip extends in the Y-axis direction as shown in (c) of Fig. 82, or may be bent so that its tip extends in the Y-axis direction as shown in (d) of Fig. 82.

[0387] In the end cap 40 of the LED lighting device 3 according to the embodiment, as shown in (a) of FIG. 80, the inner surface 43a2 opposite to the outer surface 43a1 of the first protruding piece 43a is a tapered surface so that the first protruding piece 43a is tapered, but this is not limited thereto. For example, as shown in (b) of FIG. 83, the inner surface 43a2 of the first protruding piece 43a may be a flat surface that is not inclined. Also, as shown in (b) of FIG. 83, the outer surface 43a1 of the first protruding piece 43a may be a tapered surface. This allows the first protruding piece 43a to function as a guide with the frame 20, making thermal contraction smooth. As shown in Fig. 83(c), the tip of the outer surface 43a1 of the first protruding piece 43a may be rounded to make the tip of the outer surface 43a1 a curved surface, or as shown in Fig. 83(d), the tips of the outer surface 43a1 and the inner surface 43a2 of the first protruding piece 43a may be rounded to make the tips of the outer surface 43a1 and the inner surface 43a2 a curved surface. In this case, the first protruding piece 43a functions as a guide with the frame 20.

[0388] Although not shown, not only the first protruding piece 43a but also the second protruding piece 43b, the third protruding piece 43c and the fourth protruding piece 43d may have tapered outer surfaces or curved tips. In this case, the second protruding piece 43b, the third protruding piece 43c and the fourth protruding piece 43d function as guides that guide the extension portion 32 of the cover member 30 to a predetermined position of the end cap 40, and the end cap 40 and the cover member 30 can be easily fitted together.

[0389] Moreover, the shape of the elastic member 50 of the LED lighting device 3 according to the above embodiment is not limited to that shown in Fig. 5. For example, in the above embodiment, the first elastic portion 51 of the elastic member 50 is inclined so as to fall toward the inside of the cover member 30, but as shown in Fig. 84(a), the first elastic portion 51 of the elastic member 50 may be inclined so as to fall toward the outside of the cover member 30. By inclining the first elastic portion 51, the inclination direction of the first elastic portion 51 can be intentionally determined. This makes it possible to prevent the first elastic portion 51 from protruding from the first protruding piece 43a. Also, the first elastic part 51 of the elastic member 50 may have a T-shaped cross section and be composed of a plate-like first flat part and a plate-like second flat part erected on the first flat part, as shown in (b) of Fig. 84, or may be composed of a plate-like first part and a second part with a triangular cross section provided on the first part, as shown in (c) of Fig. 84, or may be a thick block body having a rectangular cross section, as shown in (d) of Fig. 84. Although not shown, the first elastic part 51 of the elastic member 50 may be hemispherical.

[0390] Also, as shown in (a) of FIG. 85, the first elastic portion 51 of the elastic member 50 may be composed of only a plate-shaped (pleated) elastic piece, or may be a triangular prism as shown in (b) of FIG. 85. In this case, as shown in (c) of FIG. 85, the two base angles of the first elastic portion 51 having a triangular cross section may be acute angles, but as shown in (d) of FIG. 85, one of the two base angles of the first elastic portion 51 having a triangular cross section may be obtuse angles. In (d) of FIG. 85, the apex of the apex angle of the first elastic portion 51 having a triangular cross section protrudes from the contact portion between the first elastic portion 51 and the first protruding piece 43a to the inside of the cover member 30, but it may protrude to the outside.

[0391] Alternatively, end caps 40V having shapes as shown in Fig. 86 to Fig. 88 may be used. Fig. 86 is a perspective view of end cap 40V as viewed from the outer surface 41b side, and Fig. 87 is a perspective view of end cap 40V as viewed from the inner surface 41a side. Fig. 88 is an enlarged perspective view of the end of end cap 40V.

[0392] In the end cap 40V of this modification, the fitting portion 42V does not have a discontinuous portion that is not continuously formed along the shape of the outer peripheral edge of the curved portion of the main portion 41, and is composed only of a continuous portion that is continuously formed along the shape of the outer peripheral edge of the curved portion of the main portion 41. Also, as shown in FIG. 88, in the end cap 40V of this modification, a groove 48 is formed near the end end 46. The groove 48 is formed by cutting out the straight line portion that is the edge of the end of the main portion 41 on the ceiling side so that a step is generated in the straight line portion. Also, the groove 48 is formed at the end of the fitting portion 42V. By forming such a groove 48, when the end cap 40V and the cover member 30 are fixed with the adhesive 80, the adhesive 80 that flows on the outer wall surface of the fitting portion 42V can be escaped by the groove 48. As a result, even if the fitting portion 42V does not have a discontinuous portion and is composed only of a continuous portion, it is possible to suppress the adhesive 80 from going around to the vicinity of the inner extension portion 32b of the extension portion 32.

[0393] In the LED lighting device 3 according to the above embodiment, the inner extension portion 32b of the extension portion 32 of the cover member 30 extends beyond the protruding portion 20b of the frame 20, but this is not limited thereto. For example, as in the LED lighting device 3W shown in FIG. 89, the inner extension portion 32b of the extension portion 32W of the cover member 30W may extend so as not to exceed the protruding portion 20b of the frame 20W. In FIG. 89, the inner extension portion 32b of the extension portion 32W extends to the middle of the horizontal plate portion 23W of the frame 20W. This can reduce the material cost of the cover member 30W. In addition, by forming the frame 20W from a white (highly reflective) material, the light extraction efficiency can be improved. In this modification, the horizontal plate portion 23W of the frame 20W is composed of an inclined plate portion and a parallel plate portion.

[0394] Also, as in an LED lighting device 3X shown in Fig. 90, the cover member 30W shown in Fig. 89 may be applied to the frame 20 of the above embodiment. In this case, too, the inner extension portion 32b of the extension portion 32W of the cover member 30W extends so as not to exceed the protrusion 20b of the frame 20.

[0395] In the LED lighting device 3 according to the above embodiment, the extension portion 32 of the cover member 30 extends from the main portion 31, but this is not limited thereto. For example, the extension portion 32 or the inner extension portion 32b may extend toward the light source unit 10 from the positions of points A1 to A5 of the cover member 30 shown in (a) of FIG. 91. Note that point A1 is a point located on the main portion 31, point A2 is a point at the portion where the main portion 31 and the outer extension portion 32a are joined, point A3 is a point located on the outer extension portion 32a, point A4 is a point at the portion where the attachment portion 33 and the outer extension portion 32a are joined, and point A5 is a point located on the attachment portion 33. In addition, the extension portion 32 or the inner extension portion 32b may extend toward the light source unit 10 from the positions of points B1 to B3 of the cover member 30a shown in (b) of FIG. 91. The cover member 30a is composed of a main portion 31 and an attachment portion 33, and does not have an outer extension portion 32a. Point B1 is a point located on the main portion 31, point B2 is a point where the main portion 31 and the attachment portion 33 are joined, and point B3 is a point located on the attachment portion 33.

[0396] For example, when the cover member 30 having the shape shown in (a) of Fig. 91 is used, the inner extension portion 32b may extend from the main portion 31 instead of the outer extension portion 32a as shown in (a) of Fig. 92, the inner extension portion 32b may extend from the middle of the outer extension portion 32a as shown in (b) of Fig. 92, the main portion 31 may be connected to the middle of the extension portion 32 as shown in (c) of Fig. 92, or the outer extension portion 32a may be connected to the middle of the attachment portion 33 as shown in (d) of Fig. 92. Also, when the cover member 30a having the shape shown in (b) of Fig. 91 is used, the extension portion 32 may extend at an angle from the main portion 31 as shown in (a) of Fig. 93, or may extend in an arch shape from the main portion 31 as shown in (b) of Fig. 93.

[0397] In addition, in Figures 92 and 93, the portions to which the extension portion 32 or the inner extension portion 32b is directly connected are easily affected when the extension portion 32 or the inner extension portion 32b is deformed, while the portions to which the extension portion 32 or the inner extension portion 32b is not directly connected (for example, when connected via another portion) are less likely to be affected when the extension portion 32 or the inner extension portion 32b is deformed.

[0398] 92(a), (c), (d) and 93(a) and (b), the degree of influence on the main part 31 is large when the extension part 32 or the inner extension part 32b is deformed. On the other hand, in FIG. 92(b), the degree of influence on the main part 31 is small when the extension part 32 or the inner extension part 32b is deformed.

[0399] 92(d) and 93(a) and (b), the degree of influence on the mounting portion 33 is large when the extension portion 32 or the inner extension portion 32b is deformed. On the other hand, in Fig. 92(a) to (c), the degree of influence on the mounting portion 33 is small when the extension portion 32 or the inner extension portion 32b is deformed.

[0400] Therefore, in the structure of FIG. 92(b), when the extension portion 32 or the inner extension portion 32b is bent, the influence exerted on both the main portion 31 and the attachment portion 33 is small.

[0401] In addition, in the LED lighting device 3 according to the above embodiment, a convex portion and / or a concave portion may be formed on the main plate portion 21 of the frame 20. Specifically, as in the LED lighting device 3Y shown in FIG. 94, a convex portion 21c protruding toward the floor side may be formed on the main plate portion 21 of the frame 20Y. The convex portion 21c is a convex protrusion, and can be formed, for example, by applying press processing or the like to the main plate portion 21. The convex portion 21c is, for example, a bead, but is not limited thereto. Specifically, the convex portion 21c may be a dowel such as a half-moon dowel, or may be a bridge. The convex portion 21c may be a protruding portion formed over the entire length in the Y-axis direction, or may be formed in a plurality of intermittent portions along the Y-axis direction. The cross-sectional shape of the convex portion 21c formed by press processing is, for example, a rectangle, but is not limited thereto. For example, the cross-sectional shape of the convex portion 21c may be an arc shape, a trapezoid, a triangle, a U-shape, or the like. Also, in FIG. 94, the convex portion 21c is formed in the spatial region S1. Therefore, the third plate portion 32b3 of the extension portion 32 is located between the substrate 11 of the light source unit 10 and the convex portion 21c. In this way, by forming the convex portion 21c on the main plate portion 21, the strength of the frame 20Y can be improved. Moreover, by forming the convex portion 21c on the main plate portion 21, it is possible to suppress the extension portion 32 from coming off and to suppress the extension portion 32 from deforming. Furthermore, since a maze structure can be formed by forming the convex portion 21c in the spatial region S1, it is possible to further suppress the invasion of insects into the spatial region S2.

[0402] In Fig. 94, the convex portion 21c is formed in the spatial region S1, but this is not limited thereto. For example, as in an LED lighting device 3Y shown in Fig. 95, the convex portion 21c formed in the main plate portion 21 of the frame 20Y may be formed between the substrate 11 of the light source portion 10 and the third plate portion 32b3 of the extension portion 32. This can improve the strength of the frame 20Y.

[0403] Also, in Fig. 94 and Fig. 95, only one protrusion 21c is formed on the main plate 21, but this is not limited thereto. For example, as in the LED lighting device 3Y shown in Fig. 96, two protrusions 21c may be formed on the main plate 21 of the frame 20Y. In this case, the third plate 32b3, which is the tip of the extension 32, may be inserted between the two protrusions 21c. In other words, the tip of the extension 32 may be arranged so as to be sandwiched between the two protrusions 21c. In this way, by forming two protrusions 21c on the main plate 21, the strength of the frame 20Y can be further improved. Moreover, by inserting the tip of the extension 32 between the two protrusions 21c, it is possible to suppress the extension 32 from coming off and to suppress the extension 32 from being deformed. Furthermore, by forming one of the two protrusions 21c in the spatial region S1 and forming the other of the two protrusions 21c outside the spatial region S1, a more complex maze structure can be created, thereby further preventing insects from entering the spatial region S2.

[0404] In addition, in Figs. 94 to 96, the convex portion 21c is formed on the main plate portion 21, but this is not limited thereto. For example, as in the LED lighting device 3Y shown in Fig. 97, the main plate portion 21 of the frame 20Y may be formed with a concave portion 21d recessed toward the ceiling side. The concave portion 21d can be formed, for example, by applying press processing or the like to the main plate portion 21, similar to the convex portion 21c. The concave portion 21d may also be a convex portion that convex toward the ceiling side, such as a bead, but is not limited thereto. The concave portion 21d may also be a groove formed over the entire length in the Y-axis direction, or a plurality of concave portions may be formed intermittently along the Y-axis direction. The cross-sectional shape of the concave portion 21d formed by press processing is, for example, a rectangle, but is not limited thereto. For example, the cross-sectional shape of the concave portion 21d may be an arc shape, a trapezoid, a triangle, a U-shape, or the like. In Fig. 97, the third plate portion 32b3, which is the tip portion of the extension portion 32, is inserted into the concave portion 21d. In this manner, the strength of the frame 20Y can be improved by forming the recess 21d in the main plate portion 21. Moreover, by inserting the tip of the extension portion 32 into the recess 21d, it is possible to prevent the extension portion 32 from coming off and to prevent the extension portion 32 from being deformed.

[0405] In addition, as in the LED lighting device 3Y shown in FIG. 98, the main plate portion 21 of the frame 20Y may have a convex portion 21c and a concave portion 21d formed close to each other. In this way, by forming the convex portion 21c and the concave portion 21d on the main plate portion 21, the strength of the frame 20Y can be further improved. In this case, the third plate portion 32b3, which is the tip portion of the extension portion 32, may be inserted into the concave portion 21d. This can prevent the extension portion 32 from coming off and can prevent the extension portion 32 from deforming. In addition, by forming the convex portion 21c in the space region S1, a maze structure can be formed. This can prevent insects from entering the space region S2.

[0406] Also, when using a frame 20Y (as in FIG. 96) in which two protrusions 21c are formed on the main plate 21 as in the LED lighting device 3Y shown in FIG. 99, not only the third plate 32b3 but also the fourth plate 32b4 may be formed on the extension 32Y of the cover member 30Y, and the third plate 32b3 may be inserted between the substrate 11 and the protrusion 21c, and the fourth plate 32b4 may be inserted between the two protrusions 21c. With this configuration, the strength of the frame 20Y can be improved, and the extension 32Y can be prevented from coming off and from being deformed. Furthermore, a maze structure can be formed by forming one of the two protrusions 21c in the spatial region S1. This can prevent insects from entering the spatial region S2.

[0407] In addition, when using a frame 20Y in which two protrusions 21c are formed on the main plate 21 as in the LED lighting device 3Y shown in FIG. 100, the extension 32Y of the cover member 30Y may be further extended from the third plate 32b3 to form an extension 32d on the extension 32Y, and the third plate 32b3 may be inserted between the two protrusions 21c. This configuration can improve the strength of the frame 20Y, and can suppress the extension 32Y from coming off and from deforming. Furthermore, a maze structure can be formed by forming one of the two protrusions 21c in the space region S1. This can suppress insects from entering the space region S2.

[0408] In addition, as in the LED lighting device 3Y shown in FIG. 101, a frame 20Y in which three protrusions 21c are formed on the main plate 21 may be used. In this case, the extension 32Y of the cover member 30Y may be further extended from the third plate 32b3 to form an extension 32d on the extension 32Y, and a fourth plate 32b4 may be formed on the extension 32Y, and each of the third plate 32b3 and the fourth plate 32b4 may be inserted between two adjacent protrusions 21c. This configuration can further improve the strength of the frame 20Y, and can suppress the extension 32Y from coming off the frame 20Y and the extension 32Y from being deformed. Furthermore, by forming two of the three protrusions 21c in the space region S1, a more complicated maze structure can be formed. This can suppress the invasion of insects into the space region S2.

[0409] In addition, when using a frame 20Y (as in FIG. 94) in which a convex portion 21c is formed on the main plate portion 21, like the LED lighting device 3Y shown in FIG. 102, the tip surface of the extension portion 32 of the cover member 30 may be brought into contact with the top surface of the convex portion 21c.

[0410] Also, when using a frame 20Y (as in FIG. 97) in which a recess 21d is formed in the main plate 21 as in the LED lighting device 3Y shown in FIG. 103, an extension 32d may be formed in the extension 32Y of the cover member 30Y as a branching portion branching off from the middle of the third plate 32b3, and this extension 32d may be brought into contact with the end face of the substrate 11 of the light source unit 10 while the third plate 32b3 is inserted into the recess 21d. With this configuration, it is possible to further prevent the extension 32Y from coming off and to further prevent the extension 32Y from being deformed.

[0411] 94 to 103, when the main plate 21 has the protrusions 21c and / or recesses 21d, the extensions 32Y of the cover member 30Y do not need to be elastically deformed. In other words, the extensions do not need to bend. Even in this case, it is possible to prevent insects from entering the spatial region S2. Furthermore, the protrusions 21c provided on the main plate 21 may not be part of the main plate 21, but may be formed of a member separate from the main plate 21.

[0412] In addition, in the frame 20 of the LED lighting device 3 according to the above embodiment, the two protrusions 20b are formed on the main plate 21, but this is not limited thereto. For example, as shown in FIG. 104, the main plate 21 of the frame 20Z may have one protrusion 20b formed thereon. In this case, as shown in FIG. 104, the protrusion 20b may be formed in the center of the main plate 21 in the width direction. The light source unit 10 can be disposed on each of both sides of the protrusion 20b. Also, as in the frame 20Z shown in FIG. 105, the two protrusions 20b may be formed not at both ends of the main plate 21 but at positions shifted from both ends in the width direction. Also, the protrusions 20b are not limited to those formed by pressing the metal plate constituting the frame 20. For example, as in the frame 20Z shown in FIG. 106 and FIG. 107, the protrusions 20b may be cut-and-raised pieces (protrusions) formed by cutting and raising a part of the metal plate constituting the frame 20Z. In this case, the protrusion 20b, which is the cut-and-raised piece, may be formed in the center of the main board portion 21 in the width direction, as shown in Figure 106, or may be formed at both ends of the main board portion 21 in the width direction, as shown in Figure 107.

[0413] In addition, the cross-sectional shape of the floor side portion of the main part 31 of the cover member 30 and the main part 41 of the end cap 40 in the LED lighting device 3 according to the above embodiment is curved in an arc shape, but is not limited to this. For example, as in the LED lighting device 3a shown in FIG. 108, the LED lighting device 3b shown in FIG. 109, and the LED lighting device 3c shown in FIG. 110, the cross-sectional shape of the floor side portion (upper part of the figure) of the main part 31 of the cover member 300 and the main part 41 of the end cap 400 may be linear. The LED lighting device 3a in FIG. 108 is a glare-saving type light bar, and the cover member 300 has a hollow structure. In addition, a prism plate 500 is inserted into the cover member 300.

[0414] In the LED lighting fixture 1 in the above embodiment, as shown in (a) of FIG. 111, the fixture body 2 has an inverted Fuji-shaped cross section, but the present invention is not limited to this. For example, as shown in (b) of FIG. 111, the fixture body 2A may have a rectangular cross section. The fixture body 2A is I-shaped and does not have an inclined surface portion 2b having an inclined surface (reflective surface). In the fixture body 2A shown in (b) of FIG. 111, a bent portion is formed in a portion forming the opening edge of the recess 2a. This bent portion may be a 90° bend, an acute angle bend, or a hemming bend. In addition, the LED lighting device 3 fitted into the fixture body 2 or 2A may have a part of the LED lighting device 3 that is recessed into the recess 2a of the fixture body 2 or 2A. In addition, the variation of the shape of the fixture body 2 is not limited to the shape shown in (b) of FIG. 111, and may be a capped shape having an inclined surface portion (reflective portion) on the floor side when the fixture body 2 is installed on the ceiling.

[0415] In the above embodiment, the LED lighting fixture 1 is a ceiling-mounted lighting fixture in which the fixture body 2 is directly installed on the ceiling surface, but this is not limited thereto. For example, the LED lighting fixture 1 may be a ceiling-embedded lighting fixture in which the fixture body 2 is embedded in the ceiling. In this case, as shown in FIG. 111(c), the fixture body 2B is embedded in an opening provided in the ceiling 100. The LED lighting device 3 fitted into the fixture body 2B may be entirely recessed into the recess 2a of the fixture body 2B so that no part of the LED lighting device 3 protrudes from the ceiling surface of the ceiling 100, or a part of the LED lighting device 3 may protrude from the ceiling surface of the ceiling 100.

[0416] In the above embodiment, the opening edge 2a1 of the device body 2 is flat and faces the outer extension 32a of the extension 32 of the cover member 30, but this is not limited thereto. For example, as in the device body 2C shown in FIG. 112(a), the portion of the device body 2C facing the outer extension 32a of the cover member 30 may be angular so that the cross-sectional shape is triangular. In this case, the inclined surface portion 2b of the device body 2C may be inclined in two steps as shown in FIG. 112(a). Also, as in the device body 2D shown in FIG. 112(b), the cross-sectional shape of the facing portion 2g, which is the portion of the device body 2D facing the outer extension 32a of the cover member 30, may be V-shaped. In this case, as shown in FIG. 112(b), the inclined surface portion 2f of the device body 2D may be inclined toward the floor side, not toward the ceiling side. This configuration allows a gap to be provided between the outer extension 32a of the cover member 30 and the fixture body 2D. This allows a finger to be easily inserted into the gap and caught on the end of the cover member 30, making it easy to remove the LED lighting device 3 from the fixture body 2D. In FIG. 112(b), the inclined surface 2f is formed to surround the side of the LED lighting device 3. As shown in FIG. 112(c), the cross-sectional shape of the part of the fixture body 2E facing the outer extension 32a of the cover member 30 may be an obtuse triangle instead of an acute triangle. In FIG. 112(c), the inclined surface 2f of the fixture body 2E is inclined toward the floor, but this is not limited thereto. In addition, the inner surface of the inclined surface 2f of the fixture body 2E is in contact with the end of the cover member 30 in the width direction, but this is not limited thereto. In addition, in (a) to (c) of FIG. 112, the contact portions between the extension portion 32 of the cover member 30 and the device bodies 2C, 2D, and 2E are line contact rather than surface contact, so that abnormal noise can be reduced.

[0417] (Other variations) Although the LED lighting fixture and LED lighting device according to the present invention have been described above based on the embodiment and modifications thereof, the present invention is not limited to these embodiment and modifications.

[0418] For example, in the above embodiment, various shapes of frames are exemplified as frames used in the LED lighting device 3, but frames of the shapes described below may also be used. Note that the frames described below include frames having the shapes already described above. For convenience, the frames described below use the same reference numerals as in the above embodiment, although they have different shapes. The features of the frames described below may be mutually applicable, or may be applicable to the above embodiment and modified examples.

[0419] First, in the above embodiment, the horizontal plate portion 23 is composed of the parallel plate portion 23a and the inclined plate portion 23b, but this is not limited thereto. For example, as in the frame 201 shown in Fig. 113, the horizontal plate portion 23 may be composed only of the parallel plate portion, or as in the frame 202 shown in Fig. 114, the horizontal plate portion 23 may be composed only of the inclined plate portion. In this case, as in the frame 202 shown in Fig. 114, the horizontal plate portion 23 may be composed only of the inclined plate portion inclined toward the outside, or as in the frame 203 shown in Fig. 115, the horizontal plate portion 23 may be composed only of the inclined plate portion inclined toward the inside.

[0420] In the above embodiment, the standing plate portion 22 of the frame 20 is provided perpendicular to the main plate portion 21, but this is not limited thereto. For example, as in the frame 204 shown in FIG. 116, the standing plate portion 22 may be an inclined plate portion provided so as to be inclined with respect to the main plate portion 21. In this case, in the frame 204 shown in FIG. 116, the horizontal plate portion 23 is composed only of an inclined plate portion inclined toward the outside. Also, in FIG. 116, the position of the connection portion between the horizontal plate portion 23 and the side plate portion 24 is the same as the position of the main plate portion 21 (the bottom portion of the recessed portion 20a), but this is not limited thereto. Specifically, as in the frame 205 shown in FIG. 117, the position of the connection portion between the horizontal plate portion 23 and the side plate portion 24 may be located closer to the floor than the main plate portion 21 (the bottom portion of the recessed portion 20a). Also, although not shown, the position of the connection portion between the horizontal plate portion 23 and the side plate portion 24 may be located closer to the ceiling than the main plate portion 21 (the bottom portion of the recessed portion 20a).

[0421] Also, like frame 206 shown in Fig. 118, horizontal plate portion 23 may be composed of curved plate portions. Also, like frame 207 shown in Fig. 119, standing plate portion 22 may be composed only of inclined plate portions and horizontal plate portion 23 may be composed only of parallel plate portions, or like frame 208 shown in Fig. 120, standing plate portion 22 may be composed only of inclined plate portions and horizontal plate portion 23 may be composed of parallel plate portions and inclined plate portions.

[0422] Also, as in the frame 209 shown in Fig. 121, the horizontal plate portion 23 may be formed in a stepped shape. That is, the horizontal plate portion 23 may have a step. In this case, in the frame 209 shown in Fig. 121, the horizontal plate portion 23 having the step is composed of two parallel plate portions having different height positions from the main plate portion 21, but this is not limited to this. For example, as in the frame 210 shown in Fig. 122, the horizontal plate portion 23 having the step may have a parallel plate portion and an inclined plate portion located inside the parallel plate portion, as in the frame 211 shown in Fig. 123, the horizontal plate portion 23 having the step may have a parallel plate portion and an inclined plate portion located outside the parallel plate portion and inclined inward, as in the frame 212 shown in Fig. 124, the horizontal plate portion 23 having the step may have an inclined plate portion inclined outward and an inclined plate portion inclined inward. In addition, as in frame 213 shown in Figure 125, the horizontal plate portion 23 may be stepped having an inclined plate portion and a parallel plate portion, and the standing plate portion 22 may be an inclined plate portion, or as in frame 214 shown in Figure 126, the horizontal plate portion 23 may be stepped having two parallel plate portions, and the standing plate portion 22 may be an inclined plate portion.

[0423] 127, a reinforcing rib 21b may be formed at the boundary between the main plate portion 21 and the standing plate portion 22. This ensures the strength of the frame even if the side plate portion 24 is short. The reinforcing rib 21b can be formed by, for example, pressing.

[0424] In the above embodiment, the side plate portions 24 of the frame 20 extend from each of the pair of horizontal plate portions 23, but this is not limited to the above. For example, the side plate portions 24 of the frame 20 may extend from only one of the pair of horizontal plate portions 23. In other words, it is sufficient that the side plate portions 24 extend from at least one of the pair of horizontal plate portions 23.

[0425] In the above embodiment, the outer extension portion 32a of the cover member 30 may be a part of the main portion 31. In this case, the extension portion 32 of the cover member 30 is, for example, only the inner extension portion 32b, which extends from the outer extension portion 32a, which is a part of the main portion 31, toward the inside of the cover member 30.

[0426] In the above embodiment, the LED lighting device 3 is attached to the fixture body 2 by rotating the LED lighting device 3, but this is not limited to the above. That is, the LED lighting device 3 may be attached to the fixture body 2 without rotating the LED lighting device 3. Specifically, the LED lighting device 3 may be attached to the fixture body 2 by hooking a leaf spring or the like provided on the LED lighting device 3 to the fixture body 2 installed on the ce...

Claims

1. A 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 unit; and an end cap provided at an end of the cover member in a longitudinal direction, When the direction of the light emission side of the light source unit is defined as a first direction with respect to the main plate unit, The frame has a protruding portion protruding from the main plate portion toward the first direction side, The end cap has a recessed portion at least a part of which overlaps with the protruding portion when viewed in the longitudinal direction. LED lighting equipment.

2. The protruding portion has a horizontal plate portion, When viewed from the longitudinal direction, the recessed portion overlaps with the horizontal plate portion.

2. The LED lighting device according to claim 1.

3. The protrusion has an inclined plate portion, When viewed from the longitudinal direction, the recessed portion overlaps with the inclined plate portion.

2. The LED lighting device according to claim 1.

4. The protrusion has a standing plate portion standing on the main plate portion, When viewed from the longitudinal direction, the recessed portion overlaps with the upright portion.

2. The LED lighting device according to claim 1.

5. The inner surface of the recessed portion on the short side of the frame is inclined or curved.

2. The LED lighting device according to claim 1.

6. The inner surface of the recessed portion in the longitudinal direction of the frame is inclined or curved.

2. The LED lighting device according to claim 1.

7. An LED lighting device according to any one of claims 1 to 6; and a fixture body having a recess in which the LED lighting device is attached. LED lighting fixture.

Images