Lighting fixtures

Abstract

To improve the accuracy of radio communication, and improve the probability that an optical signal is received by a light-receiving part.SOLUTION: An appliance body has an opening part in which a light source unit 2 is housed. The light source unit 2 comprises: a metallic fitting plate having a first surface and a second surface in a thickness direction; a light source module fitted to the first surface of the fitting plate; and a radio module 29 fitted to the second surface of the fitting plate. The radio module 29 has an antenna part 291, and a light-receiving part 292 for receiving an optical signal. The fitting plate has an opening 222 penetrating the fitting plate in the thickness direction, and causing the radio module 29 to receive a radio signal, and causing the light -receiving part 292 to receive the optical signal. The antenna part 291 and the light -receiving part 292 are arranged side by side along a longitudinal direction of the long opening 222.SELECTED DRAWING: Figure 6

Description

【Technical Field】 【0001】 The present invention relates to a lighting fixture. More specifically, the present invention relates to a lighting fixture including a light source unit having a light source module and a wireless module, and an appliance body that supports the light source unit. 【Background Art】 【0002】 Patent Document 1 discloses a lighting module (light source unit). The lighting module of Patent Document 1 has a housing including a lighting tube having a hollow interior and a lighting tube terminal portion fixed to an end of the lighting tube and including a terminal for power supply, and a lighting portion (light source module) and an antenna portion (wireless module) are arranged in the lighting tube. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2015-69774 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 In Patent Document 1, the lighting portion is supported between the lighting tube terminal portions, and the antenna portion is supported by one of the lighting tube terminal portions. Therefore, such a lighting module has a problem with strength. 【0005】 An object of the present invention is to provide a lighting fixture that can improve the accuracy of wireless communication and the probability of receiving an optical signal at a light receiving portion. 【Means for Solving the Problems】 【0006】 A lighting fixture according to one aspect of the present invention comprises a light source unit and a fixture body that supports the light source unit. The fixture body has an opening into which the light source unit is housed. The light source unit comprises a metal mounting plate having a first surface and a second surface in the thickness direction, a light source module attached to the first surface of the mounting plate, and a wireless module attached to the second surface of the mounting plate. The wireless module has an antenna section that receives wireless signals using radio waves as a medium and a light receiving section that receives optical signals. The light source module comprises a first mounting substrate having a first side, and a second mounting substrate having a second side facing the first side in a predetermined direction perpendicular to the thickness direction. The mounting plate has an opening that penetrates the mounting plate in the thickness direction, allowing the antenna portion to receive the wireless signal and the light receiving portion to receive the optical signal. The light source module exposes the opening through a gap between the first and second sides. The gap includes notches formed in the first and second sides. The antenna section and the light receiving section are arranged so as to be aligned along the longitudinal direction of the elongated aperture. [Effects of the Invention] 【0007】 According to an aspect of the present invention, the accuracy of wireless communication can be improved, and the probability of receiving an optical signal at the light receiving unit can be improved. [Brief explanation of the drawing] 【0008】 [Figure 1] Figure 1 is a perspective view of a lighting fixture according to one embodiment. [Figure 2] Figure 2 is an exploded perspective view of the above-mentioned lighting fixture. [Figure 3] Figure 3 is a bottom view of the light source unit of the above-mentioned lighting fixture, with a portion of it cut out. [Figure 4] Figure 4 is a plan view of the above-mentioned light source unit. [Figure 5] Figure 5 is a side view of the light source unit described above. [Figure 6] Figure 6 is a partial cross-sectional view of the light source unit described above. [Figure 7] Figure 7 is a plan view of the light source unit described above, with some components omitted. [Figure 8] Figure 8 is a bottom view of the light source unit described above, with some components omitted. [Figure 9] Figure 9 is a magnified view of a portion of Figure 8. [Figure 10] Figure 10 is a bottom view of the appliance body of the lighting fixture. [Figure 11] Figure 11 is a perspective view of the lighting fixture with the main body portion omitted. [Figure 12] Figure 12 is a partial cross-sectional view taken along line A-A of Figure 10. [Figure 13] Figure 13 is a plan view of the light source unit of a modified example. [Figure 14] Figure 14 is a plan view of the light source unit of Figure 13. [Figure 15] Figure 15 is a left side view of the light source unit of Figure 13. [Figure 16] Figure 16 is a perspective view of a lighting fixture including the light source unit of Figure 13, showing a state where the light source unit is temporarily suspended from the appliance body. [Figure 17] Figure 17 is a perspective view of a lighting fixture including the light source unit of Figure 13, showing a state where the light source unit is attached to the appliance body. [Figure 18] Figure 18 is a plan view of a light source unit of another modified example with some members omitted. [Figure 19] Figure 19 is a bottom view of the light source unit of Figure 18 with some members omitted. [Figure 20] Figure 20 is a partially enlarged view of Figure 19. [Figure 21] Figures 21A and 21B are bottom views of a light source unit of another modified example with some members omitted. [Figure 22] Figures 22A and 22B are bottom views of a light source unit of another modified example with some members omitted. 【Mode for Carrying Out the Invention】 【0009】 1. Embodiment 1.1 Overview In one embodiment, as shown in FIGS. 1 and 2, the lighting fixture 1 includes a light source unit 2 and a fixture body 10 that supports the light source unit 2. As shown in FIGS. 2 and 3, the light source unit 2 has two LED (Light Emitting Diode) modules 20, and the two LED modules 20 constitute a light source module 28. Also, as shown in FIGS. 4 and 5, the light source unit 2 has a wireless module 29. The light source unit 2 further has a mounting plate 220 as shown in FIGS. 5 and 6. The mounting plate 220 is made of metal. The mounting plate 220 has a first surface 2201 and a second surface 2202 in the thickness direction. The light source module 28 (two LED modules 20) is attached to the first surface 2201 (the lower surface in FIG. 6) in the thickness direction of the mounting plate 220. On the other hand, the wireless module 29 is attached to the second surface 2202 (the upper surface in FIG. 6) in the thickness direction of the mounting plate 220. The wireless module 29 has an antenna portion 291, and the antenna portion 291 is exposed by a space 203 of the light source module 28 and an opening 222 of the mounting plate 220. The opening 222 is sized such that the space 203 fits within the opening 222 in a predetermined direction (the first direction, the left-right direction in FIG. 6) orthogonal to the thickness direction of the mounting plate 220. 【0010】 In this light source unit 2, since the mounting plate 220 is made of metal, the strength of the mounting plate 220 can be improved compared to when it is made of resin. Also, the antenna portion 291 of the wireless module 29 is exposed by the opening 222 and the space 203, and radio waves are not blocked by the mounting plate 220 and the light source module 28. Therefore, the accuracy of wireless communication by the wireless module 29 can be improved. Furthermore, the opening 222 is sized so that the space 203 fits within the opening 222 in a predetermined direction (left and right direction in Figure 6). In other words, the opening 222 extends beyond the space 203 in a predetermined direction. Therefore, compared to the case where the opening 222 is the same size as the space 203, the distance (creepage distance) between the circuit portion of the light source module 28 (the part of the light source module 28 opposite to the mounting plate 220) and the mounting plate 220 can be increased. Therefore, the insulation distance between the light source module 28 and the mounting plate 220 can be secured, and insulation performance can be ensured. In this way, the light source unit 2 can improve the accuracy of wireless communication while improving strength, and moreover, insulation performance can be ensured. This advantage also applies to the lighting fixture 1 equipped with the light source unit 2. 【0011】 1.2 Configuration The lighting fixture 1 will be described in detail below. Here, lighting fixture 1 is a lighting fixture installed in a building material (for example, a ceiling). Note that lighting fixture 1 may be directly attached to the building material or may be installed in a manner that it is embedded in the building material. 【0012】 As shown in Figures 1 and 2, the lighting fixture 1 comprises a light source unit 2 and a fixture body 10 that supports the light source unit 2. However, in the following description, unless otherwise specified, the vertical, front-to-back, and left-to-right directions in Figure 2 are defined as the vertical, front-to-back, and left-to-right directions of the lighting fixture 1 (light source unit 2 and fixture body 10). 【0013】 As shown in Figures 3 to 5, the light source unit 2 comprises a light source module 28 (two LED modules 20), a cover 21, a mounting member 22, a unit cover 23, a power supply unit 24, a wireless module 29, and two mounting springs 26. 【0014】 The mounting member 22 has a square mounting plate 220 and four side plates 221 that protrude downward from each of the four sides of the mounting plate 220 (see Figures 4 and 5). The mounting plate 220 and the four side plates 221 are integrally formed from a metal plate. Specifically, the mounting plate 220 and the four side plates 221 are integrally formed by bending a metal plate such as a galvanized steel plate. Since the mounting plate 220 is made of metal, its strength can be improved compared to when it is made of resin. The mounting plate 220 has a first surface 2201 and a second surface 2202 in the thickness direction. The first surface 2201 and the second surface 2202 are the surfaces of the mounting plate 220 that are opposite to each other. Each of the four side plates 221 is formed in an elongated trapezoidal shape. In addition, as shown in Figure 7, the mounting member 22 has an opening 222 that penetrates the mounting plate 220 in the thickness direction. The opening 222 is rectangular in shape, with its front-to-back dimension being longer than its left-to-right dimension, and is formed towards the front of the center of the mounting plate 220 in the left-to-right direction. The opening 222 is provided to expose the antenna portion 291 of the wireless module 29. 【0015】 As shown in Figure 8, the light source module 28 has two LED modules 20 (20a, 20b). Each of the two LED modules 20a and 20b is constructed by mounting multiple light-emitting elements 200 on the mounting surface (bottom surface) of a rectangular mounting substrate 201 (first mounting substrate 201a and second mounting substrate 201b). The multiple light-emitting elements 200 are arranged in a grid pattern on the mounting surface of the mounting substrate 201 and are electrically connected to each other via wiring conductors (copper foil) formed on the mounting surface. In addition, a receptacle connector 202 is mounted on the mounting surface of each mounting substrate 201, which is electrically connected to each light-emitting element 200 via wiring conductors. The receptacle connector 202 is pluggably connected to a plug connector connected to the output line of the power supply unit 24, as will be described later. 【0016】 The first mounting board 201a and the second mounting board 201b are attached to the first surface 2201 of the mounting plate 220 by screws, so as to be arranged in a predetermined direction (left-right direction in Figure 8) with a gap W10 (see Figure 9) between them. An electrically insulating sheet 223 is placed between the first mounting boards 201a and the second mounting board 201b and the first surface 2201 of the mounting plate 220. The sheet 223 is square in shape, covering almost the entire surface 2201 of the mounting plate 220, but has a rectangular window hole 2231 that exposes the opening 222. The window hole 2231 is generally larger than the opening 222. 【0017】 The first mounting substrate 201a and the second mounting substrate 201b have their respective short sides parallel to a predetermined direction, and one of the long sides (first side) 204 of the first mounting substrate 201a and one of the long sides (second side) 205 of the second mounting substrate 201b face each other in the predetermined direction. Here, as shown in Figure 9, the first mounting substrate 201a has a notch 206 (206a) formed on the first side 204, and the second mounting substrate 201b has a notch 206 (206b) formed on the second side 205. These notches 206a and 206b face each other in the predetermined direction (left-right direction). Each notch 206 is trapezoidal in shape, with the front-to-back dimension decreasing as you move from the edge to the center of the mounting substrate 201 in the predetermined direction (left-right direction). The gap between the bottom surface of the notch 206a of the first mounting substrate 201a and the bottom surface of the notch 206b of the second mounting substrate 201b forms the space 203 described above. In other words, space 203 includes the gap between the first side 204 and the second side 205, as well as the notches 206a and 206b formed on the first side 204 and the second side 205. In this way, since the gap between the mounting substrates 201 is used for space 203, space 203 can be formed more easily than if space 203 were formed on the mounting substrates 201. Furthermore, the notch 206 allows the spacing W10 between the mounting substrates 201 to be narrowed while maintaining the dimension W11 of space 203, thereby shortening the distance between the light-emitting elements 200 on different mounting substrates 201. 【0018】 Each light-emitting element 200 is an LED (in this embodiment, a white LED for illumination that emits white light). As shown in Figure 8, the plurality of light-emitting elements 200 include a first group G10 and a second group G20. The first group G10 is a group of light-emitting elements 200 mounted on the side of the first mounting substrate 201a opposite to the mounting plate 220 (mounting side). The first group G10 includes a main group G11 and a subgroup G12. The main group G11 includes multiple rows (9 rows in Figure 8) of multiple light-emitting elements 200 (5 in Figure 8) arranged at predetermined intervals W14 along a predetermined direction (left-right direction). The multiple rows of light-emitting elements 200 are arranged with predetermined intervals W15 in directions (second direction, front-back direction) perpendicular to the thickness direction (up-down direction) and predetermined directions (first direction, left-right direction), respectively, of the mounting plate 220. In other words, main group G11 is a group of light-emitting elements 200 arranged in a grid pattern (a 5x9 matrix in Figure 8). Subgroup G12 is a group of light-emitting elements 200 arranged to surround three sides of the rectangular mounting area where the light-emitting elements 200 of main group G11 are arranged. In particular, subgroup G12 surrounds three sides of the mounting area excluding the first side 204. Second group G20 includes main group G21 and subgroup G22. Main group G21 includes multiple rows (9 rows in Figure 8) of multiple light-emitting elements 200 (5 in Figure 8) arranged at predetermined intervals W14 along a predetermined direction (left-right direction). Furthermore, the multiple rows of light-emitting elements 200 are arranged with predetermined intervals W15 in directions (front-back direction) perpendicular to the thickness direction (up-down direction) and predetermined direction (left-right direction) of the mounting plate 220. In other words, main group G21 is a group of light-emitting elements 200 arranged in a grid pattern (a 5x9 matrix in Figure 8). Subgroup G22 is a group of light-emitting elements 200 arranged to surround three sides of the rectangular mounting area where the light-emitting elements 200 of main group G21 are arranged. Specifically, subgroup G22 surrounds three sides of the mounting area, excluding the second side 205. 【0019】 As described above, the first mounting board 201a and the second mounting board 201b are arranged with a gap W10 between them in a predetermined direction (left-right direction in Figure 9). Here, the dimension W11 of the space 203 in the predetermined direction is the sum of the dimension of the notch 206 and the gap W10 in the predetermined direction. The opening 222 of the mounting plate 220 is sized so that the space 203 fits within the opening 222 in the predetermined direction. In other words, the dimension W12 of the opening 222 in the predetermined direction is larger than the dimension W11 of the space 203. Therefore, compared to the case where the opening 222 is the same size as the space 203, the creepage distance (insulation distance) between the circuit portion of the light source module 28 (e.g., the portion including the light-emitting element 200 and wiring conductors) and the mounting plate 220 can be increased. Here, the size of the opening 222 is set so that the insulation distance is 4.5 mm or more. Furthermore, the insulation distance is preferably 1.5 mm or more if the voltage used by the light source unit 2 is 100 V, and 2.5 mm or more if it is 300 V. Also, the window hole 2231 of the sheet 223 is sized so that the opening 222 fits within the window hole 2231 in a predetermined direction. In other words, the dimension W13 of the window hole 2231 in a predetermined direction is larger than the dimension W12 of the opening 222. This makes it less likely for the sheet 223 to interfere with the antenna section 291. Here, the width W11 of the space 203 is also less than the predetermined spacing W14 of the light-emitting elements 200. Therefore, it is easier to arrange the light-emitting elements 200 at equal intervals in a predetermined direction across different mounting boards 201. Also, the dimension W12 of the opening 222 in a predetermined direction is less than or equal to the predetermined spacing W14. Therefore, it is even easier to arrange the light-emitting elements 200 at equal intervals in a predetermined direction across different mounting boards 201. 【0020】 The width W11 of space 203 is set so that the distance between the light-emitting element 200 on the first side 204 of main group G11 and the light-emitting element 200 on the second side 205 of main group G21 is equal to a predetermined interval W14. In this way, main group G11 of the first group G10 and main group G21 of the second group G20 constitute a group of light-emitting elements 200 arranged in a grid pattern (10 × 9 matrix pattern in Figure 8) with a predetermined interval W14. In this way, it becomes possible to arrange multiple light-emitting elements 200 mounted on different mounting substrates 201 at equal intervals. In this case, space 203 is located between two adjacent light-emitting elements in a row of light-emitting elements 200. Furthermore, subgroup G12 of the first group G10 and subgroup G22 of the second group G20 constitute a group of light-emitting elements 200 arranged to surround the grid-patterned groups of light-emitting elements 200 of main groups G11 and G21. 【0021】 Furthermore, the opening 222 of the mounting plate 220 is sized such that the space 203 fits within the opening 222 in the second direction (front-to-back direction). In other words, the dimensions of the opening 222 in the second direction are larger than the dimensions of the space 203. In other words, in the plane perpendicular to the thickness direction of the mounting plate 220, the space 203 is located within the opening 222. However, in the second direction, the space 203 is not aligned with any of the light-emitting elements 200. Therefore, in the second direction, the space 203 does not necessarily have to fit within the opening 222. Also, the window hole 2231 of the sheet 223 is sized such that the opening 222 fits within the window hole 2231 in the second direction. In other words, the dimensions of the window hole 2231 in a given direction are larger than the dimensions of the opening 222. In other words, in the plane perpendicular to the thickness direction of the mounting plate 220, the opening 222 is located within the window hole 2231. This makes it less likely for the sheet 223 to interfere with the antenna section 291. 【0022】 The wireless module 29 has a main body 290 and an antenna 291 protruding from one side (bottom surface) of the main body 290 (see Figure 6). As shown in Figure 5, the antenna 291 is substantially rectangular, with the side opposite to the main body 290 being convex. The antenna 291 also has a built-in antenna. The antenna is, for example, a planar antenna composed of a conductive pattern formed on one surface of a substrate. Note that the antenna is not limited to a planar antenna, but may also be a three-dimensional antenna. The wireless module 29 also has a light-receiving unit 292 (see Figure 9) that receives optical signals. This light-receiving unit 292 enables optical communication with the light source unit 2. The light-receiving unit 292 is provided on one side (bottom surface) of the main body 290. The light-receiving unit 292 is configured to receive optical signals. In this embodiment, the light-receiving unit 292 is equipped with an infrared light-receiving element, and the optical signal is an infrared signal. The optical signal is not limited to optical signals outside the visible light range, such as infrared signals, but may also be an optical signal in the visible light range. The main body 290 is roughly rectangular in shape and contains a circuit block. The circuit block has a communication function that transmits and receives wireless signals (signals using radio waves as a medium) through the antenna unit 291. The circuit block is configured to convert, for example, the wireless signal received via the antenna unit 291 into a control signal (first control signal) corresponding to the power supply unit 24. The circuit block is also configured to convert the optical signal received by the light receiving unit 292 into a control signal (second control signal) corresponding to the power supply unit 24. 【0023】 As shown in Figure 6, the wireless module 29 is mounted on the second surface 2202 of the mounting plate 220. At this time, as shown in Figure 9, the antenna section 291 and the light receiving section 292 are exposed through the opening 222 of the mounting plate 220, the window hole 2231 of the sheet 223, and the space 203 of the light source module 28. Therefore, the possibility of wireless signals (radio waves) being blocked by the mounting plate 220, the sheet 223, and the light source module 28 can be reduced, and the accuracy of wireless communication by the wireless module 29 can be improved. In addition, the possibility of optical signals (radio waves) being blocked by the mounting plate 220, the sheet 223, and the light source module 28 can be reduced, and the probability of the wireless module 29 receiving optical signals at the light receiving section 292 can be improved. Furthermore, as shown in Figure 9, the antenna section 291 protrudes from the first surface 2201 of the mounting plate 220 through the opening 222, the window hole 2231, and the space 203. Furthermore, a packing 224 is interposed between the main body 290 of the wireless module 29 and the second surface 2202 of the mounting plate 220. The packing 224 is frame-shaped and surrounds the opening 222, and is provided to prevent the intrusion of foreign matter. 【0024】 The power supply unit 24 is a lighting circuit that controls the light source module 28. The power supply unit 24 has a power supply circuit configured by mounting electronic components on a printed circuit board 241, and a case 240 that houses this power supply circuit (see Figures 4 and 5). The power supply circuit includes an input connector, a rectifier, a power factor correction circuit, a step-down DC / DC converter, an output connector 242, a control connector, etc. The input connector is electrically connected to the power line 140 via a first terminal block 14, which will be described later (see Figure 10). The power supply circuit converts the AC power input from the input connector into DC power, and then outputs the converted DC power from the output connector 242 via a wire (output line). The DC power is supplied to each light-emitting element 200 of each LED module 20 via a plug connector and a receptacle connector 202 connected to the end of the output line. 【0025】 Furthermore, the power supply circuit is configured to control the light source module 28 in accordance with the wireless signal (first control signal) received by the wireless module 29. For example, if the first control signal input from the wireless module 29 to the control connector is a dimming signal, the power supply circuit is configured to increase or decrease the DC power output from the output connector 242 to adjust (dimm) the light output of the LED module 20. In other words, the power supply circuit sets the light output of the light source module 28 to a value corresponding to the dimming level indicated by the dimming signal. Also, if the first control signal input from the wireless module 29 to the control connector is a turn-on signal, the power supply circuit turns on the light source module 28, and if it is a turn-off signal, it turns off the light source module 28. The power supply unit 24 enables remote control of the light source unit 2. Furthermore, the power supply circuit is configured to change the setting information in accordance with the optical signal (second control signal) received by the wireless module 29. The setting information may include, for example, information about the source of the wireless signal received by the wireless module 29. In other words, the association between the lighting fixture 1 and the remote controller can be changed by the optical signal. 【0026】 The printed circuit board 241 is a long, rectangular, flat insulating substrate with wiring conductors (copper foil) formed on the component side. Lead components such as input connectors, output connectors 242, control connectors, smoothing capacitors, and choke coils are mounted on the surface of the printed circuit board 241. Surface-mount components of the electronic components constituting the power supply circuit are mounted on the solder side of the printed circuit board 241. However, the input connectors and control connectors are mounted on one end of the printed circuit board 241 in the longitudinal direction, while the output connector 242 is mounted on the other end of the printed circuit board 241 in the longitudinal direction. The case 240 is formed in a long, box-like shape from a metal plate, as shown in Figures 4 and 5. The case 240 houses the printed circuit board 241, exposing the input connectors and output connectors 242. The power supply unit 24 is screwed to the mounting plate 220 at its front end on the upper surface, with the longitudinal direction of the case 240 aligned with the left-right direction. 【0027】 The cover 21 is translucent. The cover 21 has a square-shaped bottom 210 (see Figure 3), a peripheral wall 211 (see Figure 5) that rises upward from the periphery of the bottom 210, and four claw portions 212 (see Figure 4) provided at the upper end of the peripheral wall 211. The bottom 210, the peripheral wall 211, and the four claw portions 212 are integrally formed from a translucent synthetic resin material such as acrylic resin or polycarbonate resin. In addition, at least the bottom 210 and the peripheral wall 211 are configured to diffuse light by having a textured surface. Alternatively, at least the bottom 210 and the peripheral wall 211 may be configured to diffuse light by mixing a diffusing agent into the synthetic resin material. Each claw portion 212 is formed in a hook shape and protrudes upward from the center in the longitudinal direction (front-to-back direction or left-to-right direction) at the upper end of the peripheral wall 211. 【0028】 The cover 21 is attached to the mounting member 22 such that its peripheral wall portion 211 fits inside the side plate 221 of the mounting member 22 (see Figure 5). Here, in the mounting plate 220 of the mounting member 22, there is one through hole at the center of the longitudinal direction on each of the four sides of the mounting plate 220, corresponding to the four claw portions 212 of the cover 21. Each claw portion 212 is inserted from the bottom to the top of the mounting plate 220 into the corresponding through hole and catches on the edge of the through hole on the upper surface of the mounting plate 220 (see Figures 4 and 5). As a result, the cover 21 is attached to the mounting plate 220 of the mounting member 22 such that its peripheral wall portion 211 fits inside the side plate 221. In this way, the cover 21 is attached to the first surface 2201 of the mounting plate 220 so as to cover the light source module 28. Here, the distance L10 between the cover 21 and the antenna unit 291 is such that the shadow of the antenna unit 291 is not cast on the cover 21. In other words, the antenna unit 291 is positioned so far from the bottom 210 of the cover 21 that it cannot be seen through the bottom 210. In particular, it is preferable that the antenna unit 291 cannot be seen through the bottom 210 even when the light source module 28 is lit. 【0029】 The mounting spring 26 is composed of a torsion coil spring having a coil portion 260, two arms, and a terminal portion 263. The longer of the two arms is called the first arm 261, and the shorter arm is called the second arm. The first arm 261 has a hooking piece 264, a first arm piece 265, and a second arm piece 266. The first arm piece 265 protrudes radially from the terminal of the coil portion 260. However, multiple locations (for example, two locations) along the longitudinal direction of the first arm piece 265 are bent in the same direction (downward) (see Figure 5). The hooking piece 264 is formed in a U-shape when viewed from the front or back direction, and is connected to the tip of the first arm piece 265 at one end along the longitudinal direction and to the tip of the second arm piece 266 at the other end along the longitudinal direction (see Figure 9). The rear end of the second arm piece 266 is connected to the terminal portion 263. However, multiple locations (for example, two locations) along the longitudinal direction of the second arm piece 266 are bent in the same direction (downward). The terminal portion 263 protrudes from the rear end of the second arm piece 266 almost parallel to the hook piece 264. The second arm protrudes from the end of the coil portion 260 in the opposite direction to the first arm portion 261 (towards the center of the mounting plate 220). In Figures 4 and 5, the second arm is hidden by the unit cover 23. 【0030】 As shown in Figure 4, the unit cover 23 has a flat portion 230, a curved portion 231, and three mounting portions 232. The flat portion 230, the curved portion 231, and the three mounting portions 232 are integrally constructed from a metal plate such as a galvanized steel plate. 【0031】 The flat section 230 is formed in a flat plate shape. The curved section 231 is connected to the rear end (lower end in Figure 4) of the flat section 230. The curved section 231 is curved so as to protrude upward from the rear end of the flat section 230. However, the front half of the curved section 231 curves gently as it moves away from the flat section 230, while the rear half of the curved section 231 curves sharply downward from the apex of the curved section 231 (see Figure 5). Three mounting sections 232 are provided, one each at the front end (upper end in Figure 4) of the flat section 230, the right end of the flat section 230, and the rear end of the curved section 231. The curved section 231 also has a rectangular ventilation hole 2310. 【0032】 The three mounting portions 232 have almost identical configurations. Each mounting portion 232 has a first support portion 233 and a second support portion 234 (see Figure 5). The first support portion 233 is formed in the shape of a narrow plate (see Figure 4). The first support portion 233 is inserted through the coil portion 260 of the mounting spring 26 and is capable of supporting the coil portion 260 so that it can rotate around the axis of the coil portion 260 (see Figure 5). The second support portion 234 is formed in the shape of a flat plate and protrudes downward from the edge of the flat portion 230. The second support portion 234 has a hole 2340 that penetrates in the thickness direction (see Figure 5). This hole 2340 is formed to a size through which the end portion 263 of the mounting spring 26 can be inserted. The second support portion 234 is capable of supporting the end portion 263 that is inserted through the hole 2340. 【0033】 The unit cover 23 is fixed to the mounting plate 220 of the mounting member 22 with mounting springs 26 attached to each of the two mounting portions 232 that face each other in the front-rear direction, sandwiching the curved portion 231. Here, the upper surface (second surface 2202) of the mounting plate 220 is provided with a plurality of screw fastening portions 226 (see Figure 5). Each screw fastening portion 226 has a frustoconical projection that protrudes upward from the upper surface of the mounting plate 220 and a female thread provided on the upper surface of the projection. The unit cover 23 is fixed to the mounting member 22 by screwing multiple fixing screws 227, which are individually inserted into multiple screw insertion holes provided in the unit cover 23, into the female threads of the screw fastening portions 226 while the unit cover 23 is placed on the plurality of screw fastening portions 226 (see Figure 4). However, a space equal to the height dimension of each screw fastening portion 226 is formed between the mounting plate 220 of the mounting member 22 and the flat portion 230 of the unit cover 23. This space houses power lines that form the electrical circuit between the first terminal block 14 and the power supply unit 24, and signal lines that form the electrical circuit between the wireless module 29 and the power supply unit 24. In other words, the unit cover 23 has the function of protecting these power lines and signal lines from suspension bolts and the like by covering them from above. Although the curved section 231 covers the power supply unit 24 from above, the heat generated by the power supply unit 24 can be released to the outside (above) of the curved section 231 through the ventilation holes 2310. 【0034】 As shown in Figure 2, the fixture body 10 has a main body portion 11 that is attached to the building material (ceiling) and a main body cover 12 that is detachably connected to the main body portion 11 and covers the main body portion 11. 【0035】 The main body 11 is formed from a metal material such as galvanized steel sheet and is a shallow box shape with an open bottom. The outer shape of the main body 11 when viewed from above is square. A circular power supply hole 110 is provided in the center of the bottom surface of the main body 11. A first terminal block 14 and a second terminal block 15 are arranged near the power supply hole 110 on the bottom surface of the main body 11. As shown in Figure 10, the first terminal block 14 is electrically connected to the power cable 16 inserted through the power supply hole 110. The second terminal block 15 is electrically connected to the signal cable inserted through the power supply hole 110. Furthermore, a plug connector 17 is attached to the end of the power line 140 that is drawn out from the first terminal block 14. A signal line 150 is drawn out from the second terminal block 15. 【0036】 Multiple bolt insertion holes 111 are also provided on the bottom surface of the main body 11 (see Figure 2). These multiple bolt insertion holes 111 are formed in an oval shape with their long axes aligned with the front-to-back direction of the main body 11. The main body 11 is attached to the ceiling by tightening nuts onto suspension bolts that are inserted through at least two of these multiple bolt insertion holes 111. 【0037】 Furthermore, four hook springs 13 are provided on the bottom surface of the main body 11. Each hook spring 13 is a torsion coil spring having a coil portion 130 and two arms 131 and 132. Of the two arms 131 and 132, the longer arm is called the first arm 131, and the shorter arm is called the second arm 132. The tip of the first arm 131 is bent into a hook shape (see Figure 2). 【0038】 Each hook spring 13 is attached to the main body 11 by a fitting 133 (see Figure 2). The fitting 133 is configured to support the coil portion 130 of the hook spring 13 so that it can rotate around the axis of the coil portion 130 and move in the axial direction of the coil portion 130. 【0039】 Two of the four hook springs 13 are mounted side-by-side in the left-right direction in front of the power port 110 on the bottom surface of the main body 11. The remaining two hook springs 13 are mounted side-by-side in the left-right direction behind the power port 110 on the bottom surface of the main body 11 (see Figure 2). However, the two hook springs 13 that are mounted side-by-side are positioned so that their respective second arm portions 132 are adjacent to each other. 【0040】 The main body cover 12 is formed from a metal material such as galvanized steel sheet and has a frame-like shape with an opening 120 that is square when viewed from above. The outer part of the main body cover 12 (first part 121) of the opening 120 is formed to form the pyramidal surface of a truncated square pyramid with the opening 120 as the base (upper base). Furthermore, the outer part of the main body cover 12 (second part 122) of the first part 121 is formed to form the pyramidal surface of a truncated square pyramid with the periphery of the first part 121 as the four sides of the base (upper base). The lower surfaces of the first part 121 and the second part 122 are painted with white paint. 【0041】 As shown in Figure 11, the main body cover 12 has protruding walls (the first to fourth protruding walls 123 to 126) that project upward (towards the main body 11) from each of the four edges of the opening 120. Specifically, the first protruding wall 123 protrudes from the front edge of the opening 120, the third protruding wall 125 protrudes from the rear edge of the opening 120, the second protruding wall 124 protrudes from the right edge of the opening 120, and the fourth protruding wall 126 protrudes from the left edge of the opening 120. In other words, the first protruding wall 123 and the third protruding wall 125 face each other in the front-to-back direction across the opening 120, and the second protruding wall 124 and the fourth protruding wall 126 face each other in the left-to-right direction across the opening 120. 【0042】 The first protruding wall 123 has a flat main piece 1230 that protrudes upward from the front edge of the opening 120, and a fixing piece 1231 that protrudes parallel to the opening 120 from the upper end of the main piece 1230. Similarly, the third protruding wall 125 has a flat main piece 1250 that protrudes upward from the rear edge of the opening 120, and a fixing piece 1251 that protrudes parallel to the opening 120 from the upper end of the main piece 1250 (see Figure 11). A hook portion 127A is provided in the center of the longitudinal direction (left-right direction) of the main piece 1230 of the first protruding wall 123 (see Figure 11). A hook portion 127B is provided in the center of the longitudinal direction of the main piece 1250 of the third protruding wall 125 (see Figure 11). As shown in Figure 2, the hook portion 127B has an inverted U-shaped through hole that penetrates the main piece 1250 of the third protruding wall 125 in the thickness direction (front-to-back direction). As shown in Figure 12, the hook portion 127A has an inverted U-shaped through hole that penetrates the main piece 1230 of the first protruding wall 123 in the thickness direction (front-to-back direction). Furthermore, the hook portion 127A has a rectangular temporary holding piece 1270 that protrudes upward from the lower edge of the through hole, and two triangular projections 1271 that protrude downward from the upper edge of the through hole. 【0043】 Each of the fixing piece 1231 of the first protrusion 123 and the fixing piece 1251 of the third protrusion 125 is provided with two hooks (spring hooks) 128 (see Figure 10). In the first protrusion 123, the two hooks 128 are located on both sides in the longitudinal direction (left-right direction) of the fixing piece 1231 of the first protrusion 123. In the third protrusion 125, the two hooks 128 are located on both sides in the longitudinal direction (left-right direction) of the fixing piece 1251 of the third protrusion 125. 【0044】 The second protruding wall 124 is formed in the shape of a rectangular plate. A hook portion 127C is provided in the center of the second protruding wall 124 in the longitudinal direction (front-to-back direction) (see Figure 11). The hook portion 127C provided in the second protruding wall 124 has an inverted U-shaped through hole that penetrates the second protruding wall 124 in the thickness direction (left-to-right direction). 【0045】 The vertical height dimension of the fourth protrusion 126 is smaller than the vertical height dimension of the first to third protrusions 123 to 125 (see Figure 11). Furthermore, the fourth protrusion 126 is formed so that the height dimension of the ends 1260 on both sides in the longitudinal direction is smaller than the height dimension of the portion excluding the ends 1260 (hooking portion 129) (see Figure 11). Note that downward-facing recesses 1290 are provided at both ends in the longitudinal direction of the hooking portion 129. 【0046】 The main body cover 12 is connected to the main body 11 by the spring force of each of the four hook springs 13, where the first arms 131 of each hook spring 13 are hooked onto the corresponding hooks 128 (see Figure 10). 【0047】 1.3 Construction work Next, the process of installing the lighting fixture 1 on the ceiling will be described. First, the worker performing the installation inserts the power cable 16 and signal cable into the power hole 110 of the main body 11, and then attaches the main body 11 to the ceiling by tightening nuts onto the suspension bolts inserted into the bolt insertion holes 111. The worker also connects the power cable 16 pulled in from the power hole 110 to the first terminal block 14 and the signal cable pulled in from the power hole 110 to the second terminal block 15. Next, the worker attaches the main body cover 12 to the main body 11. The worker pulls down the first arm 131 of one of the four hook springs 13 of the main body 11, and hooks the tip of the first arm 131 onto the corresponding hook part 128 of the four hook parts 128. The worker hooks the tips of the first arms 131 of the remaining three hook springs 13 one by one onto the hook portion 128 corresponding to each hook spring 13. Then, with the tips of the first arms 131 of the four hook springs 13 hooked onto the four hook portions 128, the worker lifts the main body cover 12 upward to bring it closer to the main body 11. The first arms 131 of each hook spring 13 are displaced (rotated) upward while remaining hooked onto the respective hook portion 128. When the lower edge of the main body 11 touches the upper surface of the first portion 121 of the main body cover 12, the spring force of the four hook springs 13 hooked onto the four hook portions 128 maintains the connection between the main body 11 and the main body cover 12 (see Figure 10). 【0048】 The fixture body 10 is installed on the ceiling using the procedure described above. Next, the procedure for installing the light source unit 2 on the fixture body 10 will be explained. The worker inserts the hook piece 264 of the front mounting spring 26 into the through hole of the hook portion 127A provided on the first protruding wall 123, and hooks the hook piece 264 onto the temporary holding piece 1270 of the hook portion 127A to temporarily hold the light source unit 2 on the fixture body 10. With the light source unit 2 temporarily held on the fixture body 10, the worker connects the power line 140 of the first terminal block 14 and the signal line 150 of the second terminal block 15 to the power unit 24. After the connection work is completed, the worker inserts the first arm portion 261 of the rear mounting spring 26 into the through hole of the hook portion 127B provided on the third protruding wall 125, and then lifts the light source unit 2 and places it inside the opening 120 of the main body cover 12. Once the light source unit 2 is placed within the opening 120, the first arms 261 of each mounting spring 26 hook onto the first and third protruding walls 123 and 125, respectively (see Figure 11). As a result, the light source unit 2 is supported by the fixture body 10 (body cover 12) by the spring force of the two mounting springs 26. The installation of the lighting fixture 1 is completed using the above procedure (see Figure 1). 【0049】 Here, the main body 11 and the main body cover 12 are lighter than the fixture body 10 which is formed by combining the main body 11 and the main body cover 12. Therefore, as mentioned above, if the main body 11 and the main body cover 12 can be installed separately, the number of installation steps will increase, but the workload on the workers can be reduced. Furthermore, the light source unit 2 is attached to the fixture body 10 which is mounted on the ceiling. As a result, the lighting fixture 1 can be made more efficient in terms of installation work. 【0050】 Furthermore, since the light source unit 2 is attached to the main body cover 12, variations in the positional relationship between the main body cover 12 and the light source unit 2 can be suppressed compared to the case where the light source unit 2 is attached to the main body 11. As a result, the lighting fixture 1 can suppress the deterioration of appearance quality caused by variations in the positional relationship between the main body cover 12 and the light source unit 2. 【0051】 2. Variations The embodiments described above are merely one of many embodiments of the present invention. Furthermore, the above embodiments can be modified in various ways depending on the design, etc., as long as the objectives of the present invention are achieved. The following lists some modifications of the above embodiments. 【0052】 2.1 Variations of the Light Source Unit In the lighting fixture 1 of the above embodiment, the light source unit 2 combined with the fixture body 10 is not limited to the light source unit 2 described above. For example, the light source unit 2X described below can also be combined with the fixture body 10. The basic configuration of the light source unit 2X is the same as that of the light source unit 2. Therefore, in the following description of the light source unit 2X, components common to the light source unit 2 described above will be denoted by the same reference numerals and will be shown and described in part where appropriate. 【0053】 As shown in Figures 13 to 15, the light source unit 2X has a hooking member 27 that protrudes from the left edge of the mounting member 22. The hooking member 27 has a flat portion 270 and a wide portion 271. However, the flat portion 270 and the wide portion 271 are integrally formed from a metal plate such as a galvanized steel plate. 【0054】 The flat plate portion 270 is generally rectangular in shape. The wide portion 271 protrudes downward from one of the four sides of the flat plate portion 270 (the left side in Figure 13). The longitudinal length of the wide portion 271 is greater than the longitudinal length of the flat plate portion 270 along the longitudinal direction of the wide portion 271. In other words, the wide portion 271 has protrusions 272 at both ends in its longitudinal direction that project outward from both ends in the longitudinal direction of the flat plate portion 270. 【0055】 The hooking member 27 is attached to the upper surface of the mounting plate 220 of the mounting member 22, with approximately half of the flat plate portion 270 in the shorter direction (left-right direction in Figure 13) being attached. The flat plate portion 270 is fixed to the mounting plate 220 by being sandwiched between the mounting plate 220 and the flat portion 230 of the unit cover 23 (see Figure 14). Furthermore, the power supply unit 24 is attached to the remaining half of the flat plate portion 270 in the shorter direction. In other words, by attaching the power supply unit 24 to the upper surface of the flat plate portion 270, it is less susceptible to the effects of heat radiated from the LED module 20 while it is lit. 【0056】 Furthermore, in the light source unit 2X, the mounting spring 26 is attached only to the rightmost (leftmost in Figure 14) of the three mounting parts 232 of the unit cover 23 (see Figure 14). 【0057】 Next, the procedure for attaching the light source unit 2X to the fixture body 10 will be described. The worker inserts the wide portion 271 of the hooking member 27 into the gap between the fourth protruding wall 126 and the bottom surface of the main body 11 through the opening 120, and then hooks the protrusions 272 on both sides of the wide portion 271 onto the ends 1260 on both sides of the fourth protruding wall 126. As a result, the light source unit 2X is temporarily suspended from the fixture body 10 as shown in Figure 16. With the light source unit 2 temporarily suspended from the fixture body 10, the worker connects the power line 140 of the first terminal block 14 and the signal line 150 of the second terminal block 15 to the power supply unit 24. After the connection work is completed, the worker inserts the first arm portion 261 of the mounting spring 26 into the through hole of the hook portion 127C provided in the second protruding wall 124, and then lifts the light source unit 2 and places it inside the opening 120 of the main body cover 12. When the light source unit 2 is placed inside the opening 120, the first arm 261 of the mounting spring 26 hooks onto the hook portion 127C of the second protruding wall 124. Also, the hook member 27 moves away from the opening 120 and hooks onto the hook portion 129 provided on the fourth protruding wall 126 (see Figure 17). As a result, the light source unit 2X is supported by the fixture body 10 (body cover 12) by one mounting spring 26 and the hook member 27. The installation of the lighting fixture 1 is completed with the above procedure. 【0058】 Furthermore, in the lighting fixture 1, multiple types of light source units 2,2X can be detachably attached to (combined) a single type of fixture body 10. Therefore, the number of types of fixture body 10 can be reduced, thereby reducing manufacturing costs and inventory management costs. 【0059】 Furthermore, the hooking member 27 does not necessarily need to have a wide portion 271. The flat plate portion 270 only needs to be large and shaped to support the power supply unit 24, and its shape is not particularly limited. Also, the hooking member 27 may be formed integrally with the mounting plate 220. 【0060】 2.2 Variations of Light Source Modules Furthermore, the light source unit 2 may have a light source module 28A as shown in Figures 18 and 19. Note that the light source module 28A can also be applied to the light source unit 2X. 【0061】 The light source module 28A has one LED module 20 (20c). The LED module 20c is constructed by mounting multiple light-emitting elements 200 on the mounting surface (bottom surface) of a square-shaped mounting substrate 201 (201c). The multiple light-emitting elements 200 are arranged in the same way as the light source module 28 and are electrically connected to each other via wiring conductors (copper foil) formed on the mounting surface. In addition, receptacle connectors 202 are mounted on the mounting surface of the mounting substrate 201c, which are electrically connected to each light-emitting element 200 via wiring conductors. The mounting substrate 201c is attached to the first surface 2201 of the mounting plate 220 by screws. 【0062】 A group G30 of multiple light-emitting elements 200 is mounted on the mounting substrate 201c. Group G30 includes a main group G31 and a subgroup G32. The main group G31 includes multiple rows (9 rows in Figure 19) of multiple light-emitting elements 200 (10 in Figure 19) arranged at predetermined intervals W14 along a predetermined direction (first direction, left-right direction). The multiple rows of light-emitting elements 200 are also arranged with predetermined intervals W15 in the second direction (front-back direction). In other words, the main group G31 is a group of light-emitting elements 200 arranged in a grid pattern (5x9 matrix pattern in Figure 19). The subgroup G32 is a group of light-emitting elements 200 arranged to surround the rectangular mounting area where the light-emitting elements 200 of the main group G31 are arranged. 【0063】 As shown in Figure 19, the mounting substrate 201c has a space 203A at a position corresponding to the opening 222 of the mounting plate 220. The space 203A is a hole that penetrates the mounting substrate 201c. Therefore, it is easier to provide the space 203A at a desired position compared to using the gap between the mounting substrates 201. Also, the space 203A is an elongated hole, with the dimension in the second direction being longer than the dimension in the predetermined direction. Here, as shown in Figure 20, the dimension W16 of the space 203A in the predetermined direction is smaller than the dimension W12 of the opening 222 in the predetermined direction. Therefore, the opening 222 of the mounting plate 220 is sized so that the space 203A fits within the opening 222 in the predetermined direction. Here, the dimension W16 of the space 203A is less than the predetermined spacing W14 of the light-emitting elements 200. Therefore, it is easier to arrange the light-emitting elements 200 at equal intervals in the predetermined direction on the mounting substrate 201c. Also, the dimension W12 of the opening 222 is less than or equal to the predetermined spacing W14. Therefore, it becomes easier to arrange the light-emitting elements 200 on the mounting substrate 201c at equal intervals in a predetermined direction. Furthermore, the space 203A is located between two adjacent light-emitting elements in a row of light-emitting elements 200 arranged in a predetermined direction. Thus, even with the presence of space 203A, multiple light-emitting elements 200 can be arranged at equal intervals on the mounting substrate 201c. 【0064】 Furthermore, space 203A is sized to fit within the opening 222 in the second direction (front-to-back direction). In other words, the dimensions of space 203A in the second direction are smaller than the dimensions of the opening 222. Therefore, in the plane perpendicular to the thickness direction of the mounting plate 220, space 203A is located within the opening 222. However, in the second direction, space 203A is not aligned with any of the light-emitting elements 200. Therefore, in the second direction, space 203A does not necessarily have to fit within the opening 222. 【0065】 The wireless module 29 is attached to the second surface 2202 of the mounting plate 220. In this case, as shown in Figure 20, the antenna section 291 and the light receiving section 292 are exposed through the opening 222 of the mounting plate 220, the window hole 2231 of the sheet 223, and the space 203A of the light source module 28A. Therefore, the same effects as in the above embodiment can be obtained. 【0066】 Furthermore, the light source unit 2 may have a light source module 28B as shown in Figure 21A. The light source module 28B has two LED modules 20 (20d, 20e). Each of the two LED modules 20d, 20e is constructed by mounting multiple light-emitting elements 200 on the mounting surface (bottom surface) of a rectangular mounting substrate 201 (201d, 201e). The mounting substrates 201d, 201e are attached to the first surface 2201 of the mounting plate 220 by screws so as to be spaced apart in directions perpendicular to the thickness direction and predetermined direction of the mounting plate 220 (up and down direction in Figure 21A). The mounting substrate 201d has a space 203A, similar to the LED module 20c, but the mounting substrate 201e does not have a space 203A. In other words, in the light source module 28B, a space 203A is provided in one of the multiple mounting substrates 201. The same effects as in the above embodiment can be obtained with such a light source module 28B. Furthermore, the light source module 28B can also be applied to the light source unit 2X. 【0067】 Furthermore, the light source unit 2 may have a light source module 28C as shown in Figure 21B. The light source module 28C has four LED modules 20 (20f, 20g, 20h, 20i). Each of the four LED modules 20f to 20i is constructed by mounting multiple light-emitting elements 200 on the mounting surface (bottom surface) of a square mounting substrate 201 (201f to 201i). The four mounting substrates 201 (201f to 201i) are attached to the first surface 2201 of the mounting plate 220 by screws so that they are arranged in a grid pattern (2x2 matrix pattern) at equal intervals (equal to the interval W10). Here, the mounting substrate 201f (first mounting substrate 201f) and the mounting substrate 201g (second mounting substrate 201g) have one side (first side) 204 of the first mounting substrate 201f and one side (second side) 205 of the second mounting substrate 201g facing each other in a predetermined direction. The first mounting substrate 201f has a notch 206 formed on the first side 204, and the second mounting substrate 201g has a notch 206 formed on the second side 205. These notches 206 face each other in a predetermined direction (left-right direction). In the light source module 28C as well, the gap between the bottom surface of the notch 206 of the first mounting substrate 201f and the bottom surface of the notch 206 of the second mounting substrate 201g forms a space 203. In other words, in the light source module 28C, the gap between two of the multiple mounting boards 201f and 201g is used as space 203. The same effects as in the above embodiment can be obtained with such a light source module 28C. Note that the light source module 28C can also be applied to the light source unit 2X. 【0068】 Furthermore, the light source unit 2 may have a light source module 28D as shown in Figure 22A. The light source module 28D has two LED modules 20 (20j, 20k). The LED module 20j is constructed by mounting multiple light-emitting elements 200 on the mounting surface (bottom surface) of a square-shaped mounting substrate 201 (201j). The LED module 20k is constructed by mounting multiple light-emitting elements 200 on the mounting surface (bottom surface) of an L-shaped mounting substrate 201 (201k). The two mounting substrates 201 (first mounting substrate 201j, second mounting substrate 201k) are attached to the first surface 2201 of the mounting plate 220 by screws so as to form a square area, as shown in Figure 22A. Here, the first mounting substrate 201j and the second mounting substrate 201k are positioned such that one side (first side) 204 of the first mounting substrate 201j and one side (second side) 205 of the second mounting substrate 201k are separated by a gap (equal to the gap W10) in a predetermined direction and face each other. Here, the first mounting substrate 201j has a notch 206 formed on its first side 204, and the second mounting substrate 201k has a notch 206 formed on its second side 205. These notches 206 face each other in a predetermined direction (left-right direction). In the light source module 28D as well, the gap between the bottom surface of the notch 206 of the first mounting substrate 201j and the bottom surface of the notch 206 of the second mounting substrate 201k forms a space 203. In other words, in the light source module 28D, the gap between the two mounting substrates 201j and 201k is used as space 203. The same effects as those in the above embodiment can be obtained with such a light source module 28D. Furthermore, the light source module 28D can also be applied to the light source unit 2X. 【0069】 The light source unit 2 may also have a light source module 28E as shown in Figure 22B. The light source module 28E has one LED module 20 (20l). The LED module 20l is constructed by mounting a plurality of light-emitting elements 200 on the mounting surface (bottom surface) of a square-shaped mounting substrate 201 (201l). The plurality of light-emitting elements 200 are arranged in a grid pattern on the mounting surface of the mounting substrate 201l and are electrically connected to each other via wiring conductors (copper foil) formed on the mounting surface. The mounting substrate 201c is attached to the first surface 2201 of the mounting plate 220 by screws. The mounting substrate 201l has a space 203A at a position corresponding to the opening 222 of the mounting plate 220. The mounting substrate 201l also has a slit 207 that extends along a second direction, with one end connected to the space 203A and the other end open to the outside. The same effects as in the above embodiment can be obtained with such a light source module 28E. Furthermore, the light source module 28E can also be applied to the light source unit 2X. 【0070】 2.3 Other variations Furthermore, lighting fixture 1 may be a lighting fixture directly attached to a building material other than the ceiling (for example, a wall), or a recessed lighting fixture embedded in a building material (for example, a ceiling or wall). 【0071】 Furthermore, the mounting member 22 does not necessarily have to have four side plates 221. The mounting plate 220 does not necessarily have to be square, and may be other shapes such as rectangles, circles, or polygons. 【0072】 Furthermore, in the mounting plate 220, the shapes of the opening 222, the window hole 2231, and the space 203 are not limited to the above example and can be changed depending on the shape of the antenna portion 291. In other words, the opening 222, the window hole 2231, and the space 203 may be polygons such as squares, or circular, rather than rectangles. In short, the opening 222, the window hole 2231, and the space 203 only need to be able to expose the antenna portion 291. In particular, the space 203 does not need to include a notch 206 (206a, 206b) formed on at least one of the first side 204 and the second side 205. In other words, the mounting substrate 201 does not need to have a notch 206 formed on it. Also, the notch 206 does not need to be formed on both the first side 204 and the second side 205. In other words, space 203 only needs to include a notch 206 (206a, 206b) formed on at least one of the first side 204 and the second side 205. 【0073】 Furthermore, the positions of the opening 222, window hole 2231, and space 203 in the mounting plate 220 are not limited to the above example and can be changed depending on the position of the wireless module 29. However, if the antenna portion 291 protrudes from the first surface 2201 of the mounting plate 220, it is preferable that it be located closer to the center than the outermost light-emitting element 200 of the light source module 28. This is to suppress reflections of the antenna portion 291 onto the cover 21. 【0074】 Furthermore, the wireless module 29 does not necessarily have to include a light-receiving unit 292. 【0075】 Furthermore, the light source units 2,2X do not necessarily have to be equipped with the cover 21 and the unit cover 23. 【0076】 Furthermore, the arrangement of the light-emitting elements 200 is not limited to the above example. In the above embodiment, for example, the spacing (W14) of the light-emitting elements 200 in a predetermined direction (first direction) is smaller than the spacing (W15) of the light-emitting elements 200 in a second direction. However, the spacing (W14) of the light-emitting elements 200 in a predetermined direction (first direction) may be larger than or the same as the spacing (W15) of the light-emitting elements 200 in a second direction. However, it is preferable that the light-emitting elements 200 are arranged so that light is uniformly irradiated from the lighting fixture 1. 【0077】 Furthermore, the number of LED modules 20 is not particularly limited, and the light-emitting element 200 does not have to be an LED light source; for example, it may be an organic electroluminescent element. 【0078】 Furthermore, the light source units 2,2X may have mounting fixtures of a different shape from the mounting spring 26. The mounting fixtures may be, for example, projections that protrude from the mounting plate 220 in the direction opposite to the hooking member 27. 【0079】 Furthermore, the shapes of the main body portion 11 and the main body cover 12 in the device body 10 are not limited to the shapes of the above embodiment. For example, although the main body portion 11 and the main body cover 12 in the above embodiment have a square outer shape when viewed from the top and bottom, they may be circular or polygonal, such as a rectangle. In particular, the shape of the main body cover 12 is not limited to the shape of a combination of two conical surfaces as described above. For example, the main body cover 12 may be flat. Also, the main body cover 12 does not need to have both the set of the first protrusion 123 and the third protrusion 125 and the set of the second protrusion 124 and the fourth protrusion 126. In other words, the main body cover 12 only needs to have either the set of the first protrusion 123 and the third protrusion 125 or the set of the second protrusion 124 and the fourth protrusion 126. Also, the lower surfaces of the first portion 121 and the second portion 122 of the main body cover 12 do not need to be painted with white paint. 【0080】 Furthermore, the main body 11 and the main body cover 12 do not necessarily have to be joined using the hook spring 13. For example, a screw may be used instead of the hook spring 13. Alternatively, the main body 11 and the main body cover 12 may be formed as a single unit. 【0081】 3. Appearance As is clear from the embodiments and modifications described above, the light source unit (2;2X) of the first embodiment comprises a metal mounting plate (220), light source modules (28;28A~28E), and a wireless module (29). The mounting plate (220) has a first surface (2201) and a second surface (2202) in the thickness direction. The light source modules (28;28A~28E) are attached to the first surface (2201) of the mounting plate (220). The wireless module (29) has an antenna portion (291) and is attached to the second surface (2202) of the mounting plate (220). The mounting plate (220) has an opening (222) that penetrates the mounting plate (220) in the thickness direction and exposes the antenna portion (291) of the wireless module (29). The light source module (28; 28A~28E) has a space (203; 203A) that exposes the antenna portion (291) exposed from the opening (222). The opening (222) is sized such that the space (203; 203A) is contained within the opening (222) in a predetermined direction perpendicular to the thickness direction of the mounting plate (220). According to the first embodiment, the accuracy of wireless communication can be improved while increasing strength, and insulation performance can be ensured. 【0082】 A light source unit (2;2X) of a second embodiment can be realized by combining it with the first embodiment. In the second embodiment, the light source module (28;28C;28D) includes a first mounting substrate (201a;201f;201j) and a second mounting substrate (201b;201g;201k). The first mounting substrate (201a;201f;201j) has a first edge (204). The second mounting substrate (201b;201g;201k) has a second edge (205) that is opposite to the first edge (204) in the predetermined direction. The space (203) includes the gap between the first edge (204) and the second edge (205). According to the second embodiment, since the gaps between the mounting substrates (201) are used as space (203), the space (203) can be formed more easily than when the space (203) is formed on the mounting substrates (201). 【0083】 A light source unit (2;2X) of a third embodiment can be realized by combining with the second embodiment. In the third embodiment, the space (203) includes notches (206;206a, 206b) formed on at least one of the first side (204) and the second side (205). According to the third embodiment, the spacing between mounting substrates (201) can be narrowed and the distance between light-emitting elements (200) on different mounting substrates (201) can be shortened. 【0084】 A light source unit (2;2X) of the fourth embodiment can be realized in combination with the second or third embodiment. In the fourth embodiment, the light source module (28;28C;28D) includes a first group (G10) and a second group (G20). The first group (G10) is a group of light-emitting elements (200) mounted on the side of the first mounting substrate (201a;201f;201j) opposite to the mounting plate (220). The second group (G20) is a group of light-emitting elements (200) mounted on the side of the second mounting substrate (201b;201g;201k) opposite to the mounting plate (220). The first group (G10) includes one or more rows of light-emitting elements (200) arranged at predetermined intervals (W14) along the predetermined direction. The second group (G20) includes one or more rows of light-emitting elements (200) arranged at predetermined intervals (W14) along the predetermined direction. The dimension (W11) of the space (203, 203A) in the predetermined direction is less than the predetermined interval (W14). According to the fourth embodiment, it becomes easier to arrange the light-emitting elements (200) at equal intervals in the predetermined direction across different mounting substrates (201). 【0085】 A light source unit (2;2X) of the fifth embodiment can be realized by combining it with the fourth embodiment. In the fifth embodiment, the dimension (W12) of the opening (222) in the predetermined direction is less than or equal to the predetermined interval (W14). According to the fifth embodiment, it becomes easier to arrange the light-emitting elements (200) at equal intervals in the predetermined direction across different mounting substrates (201). 【0086】 A light source unit (2;2X) of the sixth embodiment can be realized by combining it with the first embodiment. In the sixth embodiment, the light source module (28A;28B;28E) has mounting substrates (201c;201d;201l). The space (203A) is a hole that penetrates the mounting substrates (201c;201d;201l). According to the sixth embodiment, it is easier to provide the space (203A) at a desired position compared to using the gaps between the mounting substrates (201). 【0087】 A light source unit (2;2X) of the seventh embodiment can be realized in combination with the sixth embodiment. In the seventh embodiment, the light source module (28A;28B;28E) includes a group (G30) of light-emitting elements (200) mounted on the side of the mounting substrate (201c;201d;201l) opposite to the mounting plate (220). The group (G30) of light-emitting elements (200) includes a row of light-emitting elements (200) arranged at a predetermined interval (W14) along the predetermined direction. The space (203A) is located between two adjacent light-emitting elements (200) in the row of light-emitting elements (200). The dimension (W16) of the space (203A) in the predetermined direction is less than the predetermined interval (W14). According to the seventh embodiment, it is easier to arrange the light-emitting elements (200) at equal intervals in the predetermined direction on the mounting substrate (201). 【0088】 The light source unit (2;2X) of the eighth embodiment can be realized by combining it with the seventh embodiment. In the eighth embodiment, the dimension (W12) of the opening (222) in the predetermined direction is less than or equal to the predetermined interval (W14). According to the eighth embodiment, it becomes easier to arrange the light-emitting elements (200) on the mounting substrate (201) at equal intervals in the predetermined direction. 【0089】 A light source unit (2;2X) of the ninth embodiment can be realized by combining it with the first embodiment. In the ninth embodiment, the light source modules (28;28A~28E) further have a cover (21). The cover (21) is light-transmitting and is attached to the first surface (2201) of the mounting plate (220) so as to cover the light source modules (28, 28A~28E). The antenna portion (291) protrudes from the first surface (2201) of the mounting plate (220) through the opening (222) and the space (203;203A). The distance (L10) between the cover (21) and the antenna portion (291) is such that the shadow of the antenna portion (291) is not cast on the cover (21). According to the ninth embodiment, it is possible to improve the accuracy of wireless communication by the wireless module (29) while suppressing a decrease in the illumination performance of the light source unit (2;2X). 【0090】 A light source unit (2;2X) of the tenth embodiment can be realized in combination with the ninth embodiment. In the tenth embodiment, the light source module (28;28A~28E) includes a row of light-emitting elements (200) arranged along a predetermined direction. The space (203;203A) is located between two adjacent light-emitting elements (200) in the row of light-emitting elements (200). According to the tenth embodiment, it is easier to arrange the light-emitting elements (200) at equal intervals in a predetermined direction. 【0091】 The light source unit (2;2X) of the eleventh embodiment can be realized in combination with any one of the first to tenth embodiments. In the eleventh embodiment, the wireless module (29) has a light receiving unit (292) that receives an optical signal. The light receiving unit (292) is exposed from the aperture (222) and the space (203;203A). According to the eleventh embodiment, optical communication with the light source unit (2;2X) becomes possible. 【0092】 A light source unit (2;2X) of the twelfth embodiment can be realized in combination with any one of the first to eleventh embodiments. In the twelfth embodiment, the light source unit (2;2X) further comprises a lighting circuit (24). The wireless module (29) is configured to receive wireless signals through the antenna unit (291). The lighting circuit (24) is configured to control the light source modules (28, 28A~28E) in response to the wireless signals received by the wireless module (29). According to the twelfth embodiment, remote control of the light source unit (2;2X) becomes possible. 【0093】 The lighting fixture (1) of the 13th embodiment comprises a light source unit (2;2X) from any one of the first to 12th embodiments, and a fixture body (10) that supports the light source unit (2;2X). According to the 13th embodiment, it is possible to improve the accuracy of wireless communication while increasing the intensity, and furthermore, to ensure insulation performance. [Explanation of Symbols] 【0094】 1 Lighting fixtures 10. Main body of the device 2.2X light source unit 201, 201a~201l Mounting board 203, 203A space 204 First side 205 Second side 206, 206a, 206b Notches 21 Cover 220 Mounting plate 2201 1st page 2202 2nd page 222 Aperture 24 Power supply unit (lighting circuit) 28, 28A~28E Light Source Modules 29 Wireless Modules 291 Antenna section 292 Light receiving part G10, G20, G30 Groups L10 distance W11 dimensions W12 dimensions W14 predetermined interval W16 dimensions

Claims

[Claim 1] Light source unit, The fixture body supporting the light source unit, Equipped with, The fixture body has an opening in which the light source unit is housed, The aforementioned light source unit is A metal mounting plate having a first surface and a second surface in the thickness direction, A light source module attached to the first surface of the mounting plate, A wireless module is attached to the second surface of the mounting plate, Equipped with, The aforementioned wireless module is An antenna unit that receives wireless signals using radio waves as a medium, A light receiving unit that receives optical signals, It has, The light source module comprises a first mounting substrate having a first side, and a second mounting substrate having a second side facing the first side in a predetermined direction perpendicular to the thickness direction. The mounting plate has an opening that penetrates the mounting plate in the thickness direction, allowing the antenna portion to receive the wireless signal and the light receiving portion to receive the optical signal. The light source module exposes the opening through the gap between the first side and the second side. The gap includes notches formed on the first and second sides, The antenna section and the light receiving section are arranged so as to be aligned along the longitudinal direction of the elongated aperture. Lighting fixtures. [Claim 2] The wireless module further comprises a main body on which the light receiving unit is provided, The main body is formed integrally with the antenna section. A lighting fixture according to claim 1. [Claim 3] The light source module includes a first group of light-emitting elements mounted on the side of the first mounting substrate opposite to the mounting plate, and a second group of light-emitting elements mounted on the side of the second mounting substrate opposite to the mounting plate. The first group includes one or more rows of light-emitting elements arranged at predetermined intervals along the predetermined direction, The second group includes one or more rows of light-emitting elements arranged at predetermined intervals along the predetermined direction, A lighting fixture according to claim 1 or 2. [Claim 4] The light source unit further comprises a translucent cover attached to the first surface of the mounting plate so as to cover the light source module. A lighting fixture according to any one of claims 1 to 3. [Claim 5] The light source unit further comprises a lighting circuit, The lighting circuit is configured to control the light source module in accordance with the wireless signal received by the wireless module. A lighting fixture according to any one of claims 1 to 4.

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