Luminaire

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, and more particularly, to a lighting fixture including a light source unit including a light source module and a wireless module, and a fixture body that supports the light source unit. [Background technology]

[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 with a hollow interior and a lighting tube terminal part that is fixed to an end of the lighting tube and includes a terminal for power supply, and a lighting part (light source module) and an antenna part (wireless module) are arranged inside the lighting tube. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-69774 A Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the lighting unit is supported between the lighting tube terminals, and the antenna unit is supported on one of the lighting tube terminals. Therefore, there is a concern about the strength of such a lighting module.

[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 section. [Means for solving the problem]

[0006] A lighting fixture according to one aspect of the present invention includes a light source unit and a fixture body supporting the light source unit. The fixture body has an opening into which the light source unit is fitted. The light source unit includes a metal mounting plate having a first surface and a second surface in a 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 a wireless signal using radio waves as a medium, and a light receiving section that receives an optical signal. The mounting plate has an opening that penetrates the mounting plate in the thickness direction and allows the antenna section to receive the wireless signal and the light receiving section to receive the optical signal. The antenna section and the light receiving section are arranged to be aligned along the longitudinal direction of the elongated opening. Effect of the Invention

[0007] According to the aspects of the present invention, it is possible to improve the accuracy of wireless communication and also to increase the probability that an optical signal is received by a light receiving unit. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a lighting fixture according to one embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the lighting fixture. [Diagram 3] FIG. 3 is a bottom view of the light source unit of the lighting fixture, with a portion cut away. [Figure 4] FIG. 4 is a plan view of the light source unit. [Diagram 5] FIG. 5 is a side view of the light source unit. [Figure 6] FIG. 6 is a partial cross-sectional view of the light source unit. [Figure 7] FIG. 7 is a plan view of the light source unit with some members omitted. [Figure 8] FIG. 8 is a bottom view of the light source unit with some members omitted. [Figure 9] FIG. 9 is a partially enlarged view of FIG. [Figure 10]FIG. 10 is a bottom view of the main body of the lighting fixture. [Figure 11] FIG. 11 is a perspective view of the lighting fixture with the main body omitted. [Figure 12] FIG. 12 is a partial cross-sectional view taken along line AA in FIG. [Figure 13] FIG. 13 is a plan view of a light source unit according to a modified example. [Figure 14] FIG. 14 is a plan view of the light source unit of FIG. [Figure 15] FIG. 15 is a left side view of the light source unit of FIG. [Figure 16] FIG. 16 is a perspective view of a lighting fixture including the light source unit of FIG. 13, showing a state in which the light source unit is temporarily suspended from the fixture body. [Figure 17] FIG. 17 is a perspective view of a lighting fixture including the light source unit of FIG. 13, showing a state in which the light source unit is attached to the fixture body. [Figure 18] FIG. 18 is a plan view of a light source unit according to another modified example, with some members omitted. [Figure 19] FIG. 19 is a bottom view of the light source unit of FIG. 18 with some members omitted. [Figure 20] FIG. 20 is a partially enlarged view of FIG. [Figure 21] 21A and 21B are bottom views of a light source unit according to another modified example, with some members omitted. [Figure 22] 22A and 22B are bottom views of a light source unit according to another modified example, with some members omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 includes two LED (Light Emitting Diode) modules 20, and the two LED modules 20 configure a light source module 28. As shown in Figs. 4 and 5, the light source unit 2 also includes a wireless module 29. As shown in Figs. 5 and 6, the light source unit 2 further includes a mounting plate 220. 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 through the space 203 of the light source module 28 and the opening 222 of the mounting plate 220. The opening 222 is sized so that the space 203 fits within the opening 222 in a predetermined direction (a first direction, the left-right direction in FIG. 6) perpendicular 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. In addition, the antenna part 291 of the wireless module 29 is exposed through 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 large enough that the space 203 fits within the opening 222 in a predetermined direction (the left-right direction in FIG. 6). That is, the opening 222 is wider than the space 203 in the predetermined direction. Therefore, compared to when the opening 222 is the same size as the space 203, the distance (creepage distance) between the circuit part of the light source module 28 (the part of the light source module 28 on the opposite side to the mounting plate 220) and the mounting plate 220 can be made longer. Therefore, the insulation distance between the light source module 28 and the mounting plate 220 can be ensured, and the insulation performance can be ensured. In this way, according to the light source unit 2, the accuracy of wireless communication can be improved while improving the strength, and the 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, the lighting fixture 1 is a lighting fixture that is installed in a construction material (for example, a ceiling). The lighting fixture 1 may be directly attached to the construction material, or may be installed in a manner that is embedded in the construction material.

[0012] 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. However, in the following description, unless otherwise specified, the up-down direction, the front-back direction, and the left-right direction in Fig. 2 are defined as the up-down direction, the front-back direction, and the left-right direction of the lighting fixture 1 (the light source unit 2 and the fixture body 10).

[0013] As shown in Figures 3 to 5, the light source unit 2 includes 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 protruding downward from each of the four sides of the mounting plate 220 (see Figs. 4 and 5). The mounting plate 220 and the four side plates 221 are integrally formed by 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 zinc steel plate. The mounting plate 220 is made of metal, and the strength of the mounting plate 220 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 surfaces of the mounting plate 220 on the opposite sides to each other. Each of the four side plates 221 is formed in an elongated trapezoidal shape. In addition, the mounting member 22 has an opening 222 penetrating the mounting plate 220 in the thickness direction as shown in Fig. 7. The opening 222 has a rectangular shape with the dimension in the front-rear direction of the light source unit 2 being longer than the dimension in the left-right direction, and is formed toward the front of the center in the left-right direction of the mounting plate 220. The opening 222 is provided to expose the antenna portion 291 of the wireless module 29.

[0015] As shown in FIG. 8, the light source module 28 has two LED modules 20 (20a, 20b). Each of the two LED modules 20a, 20b is configured by mounting a plurality of light emitting elements 200 on the mounting surface (lower surface) of a rectangular mounting substrate 201 (first mounting substrate 201a and second mounting substrate 201b). The plurality of light emitting elements 200 are arranged in a lattice 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 electrically connected to each light emitting element 200 via the wiring conductor is mounted on the mounting surface of each mounting substrate 201. The receptacle connector 202 is removably connected to a plug connector wired to an output line of the power supply unit 24 as described later.

[0016] The first mounting board 201a and the second mounting board 201b are attached to the first surface 2201 of the attachment plate 220 by screwing so as to be lined up at a distance W10 (see FIG. 9) in a predetermined direction (the left-right direction in FIG. 8). An electrically insulating sheet 223 is disposed between the first mounting board 201a and the second mounting board 201b and the first surface 2201 of the attachment plate 220. The sheet 223 is square-shaped so as to cover almost the entire surface of the first surface 2201 of the attachment plate 220, and has a rectangular window hole 2231 that exposes the opening 222. The window hole 2231 is larger than the opening 222 overall.

[0017] The first mounting board 201a and the second mounting board 201b have their respective short sides parallel to a predetermined direction, and one of the long sides (first side) 204 of the first mounting board 201a and one of the long sides (second side) 205 of the second mounting board 201b face each other in the predetermined direction. Here, as shown in FIG. 9, the first mounting board 201a has a notch 206 (206a) formed in the first side 204, and the second mounting board 201b has a notch 206 (206b) formed in the second side 205. These notches 206a and 206b face each other in a predetermined direction (left-right direction). Each notch 206 is trapezoidal in shape with a dimension in the front-rear direction decreasing from the end of the mounting board 201 to the center 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 above-mentioned space 203. In other words, the space 203 includes the gap between the first side 204 and the second side 205, and also includes the notches 206a and 206b formed in the first side 204 and the second side 205. In this way, the gap between the mounting substrates 201 is used for the space 203, so that the space 203 can be formed more easily than when the space 203 is formed in the mounting substrate 201. In addition, the notch 206 can narrow the interval W10 between the mounting substrates 201 while maintaining the dimension W11 of the space 203, and the distance between the light emitting elements 200 of the different mounting substrates 201 can be shortened.

[0018] Each light emitting element 200 is an LED (in this embodiment, a white LED for illumination that emits white light). As shown in FIG. 8, the plurality of light emitting elements 200 includes a first group G10 and a second group G20. The first group G10 is a group of light emitting elements 200 mounted on a surface (mounting surface) of the first mounting board 201a opposite to the mounting plate 220. The first group G10 includes a main group G11 and a subgroup G12. The main group G11 includes a plurality of rows (nine rows in FIG. 8) of a plurality of light emitting elements 200 (five in FIG. 8) arranged at a predetermined interval W14 along a predetermined direction (left-right direction). The plurality of rows of the light emitting elements 200 are arranged at a predetermined interval W15 in a direction (second direction, front-rear direction) perpendicular to the thickness direction (up-down direction) and the predetermined direction (first direction, left-right direction) of the mounting plate 220. That is, the main group G11 is a group of light emitting elements 200 arranged in a lattice (in a 5×9 matrix in FIG. 8). The subgroup G12 is a group of light emitting elements 200 arranged so as to surround three sides of a rectangular mounting area in which the light emitting elements 200 of the main group G11 are arranged. In particular, the subgroup G12 surrounds three sides of the mounting area excluding the first side 204 side. The second group G20 includes the main group G21 and the subgroup G22. The main group G21 includes a plurality of rows (nine rows in FIG. 8) of a plurality of light emitting elements 200 (five in FIG. 8) arranged at a predetermined interval W14 along a predetermined direction (left-right direction). In addition, the plurality of rows of the light emitting elements 200 are arranged at a predetermined interval W15 in a direction (front-back direction) perpendicular to the thickness direction (up-down direction) and the predetermined direction (left-right direction) of the mounting plate 220. That is, the main group G21 is a group of light emitting elements 200 arranged in a lattice pattern (a 5×9 matrix pattern in FIG. 8). The subgroup G22 is a group of light emitting elements 200 arranged so as to surround three sides of a rectangular mounting area in which the light emitting elements 200 of the main group G21 are arranged. In particular, the subgroup G22 surrounds three sides of the mounting area excluding the second side 205 side.

[0019] As described above, the first mounting board 201a and the second mounting board 201b are arranged at a distance W10 in a predetermined direction (left-right direction in FIG. 9). Here, the dimension W11 of the space 203 in the predetermined direction is the sum of the dimension of the notch 206 in the predetermined direction and the distance W10. The opening 222 of the mounting plate 220 is large enough to fit the space 203 in the predetermined direction. That is, 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 part of the light source module 28 (for example, a part including the light emitting element 200 and the wiring conductor) and the mounting plate 220 can be made longer. Here, the size of the opening 222 is set so that the insulation distance is 4.5 mm or more. In addition, the insulation distance is preferably 1.5 mm or more if the voltage used in the light source unit 2 is 100 V, and 2.5 mm or more if the voltage is 300 V. In addition, the window hole 2231 of the sheet 223 is a size that the opening 222 fits in the window hole 2231 in a predetermined direction. That is, the dimension W13 of the window hole 2231 in the predetermined direction is larger than the dimension W12 of the opening 222. This makes it difficult for the sheet 223 to get in the way of the antenna section 291. Here, the width W11 of the space 203 is also less than the predetermined interval W14 of the light emitting element 200. Therefore, it becomes easier to arrange the light emitting element 200 at equal intervals in a predetermined direction across different mounting substrates 201. In addition, the dimension W12 of the opening 222 in the predetermined direction is equal to or less than the predetermined interval W14. Therefore, it becomes easier to arrange the light emitting element 200 at equal intervals in a predetermined direction across different mounting substrates 201.

[0020] The width W11 of the space 203 is set so that the distance between the light emitting element 200 closest to the first side 204 of the main group G11 and the light emitting element 200 closest to the second side 205 of the main group G21 is equal to the predetermined distance W14. As a result, the main group G11 of the first group G10 and the main group G21 of the second group G20 form a group of light emitting elements 200 arranged in a lattice shape (10×9 matrix shape in FIG. 8) at the predetermined distance W14. In this way, it is possible to arrange a plurality of light emitting elements 200 mounted on different mounting boards 201 at equal intervals. In this case, the space 203 is located between two adjacent light emitting elements in the row of the light emitting elements 200. The subgroup G12 of the first group G10 and the subgroup G22 of the second group G20 form a group of light emitting elements 200 arranged to surround the group of light emitting elements 200 arranged in a lattice shape of the main groups G11 and G21.

[0021] Moreover, the opening 222 of the mounting plate 220 is sized so that the space 203 fits within the opening 222 in the second direction (front-rear direction). That is, the dimension of the opening 222 in the second direction is larger than the dimension of the space 203. In other words, the space 203 is located within the opening 222 in a plane perpendicular to the thickness direction of the mounting plate 220. However, the space 203 is not aligned with any of the light-emitting elements 200 in the second direction. Therefore, the space 203 does not necessarily have to fit within the opening 222 in the second direction. Moreover, the window hole 2231 of the sheet 223 is sized so that the opening 222 fits within the window hole 2231 in the second direction. That is, the dimension of the window hole 2231 in a predetermined direction is larger than the dimension of the opening 222. In other words, the opening 222 is located within the window hole 2231 in a plane perpendicular to the thickness direction of the mounting plate 220. This makes it difficult for the sheet 223 to get in the way of the antenna portion 291.

[0022] The wireless module 29 has a main body 290 and an antenna unit 291 protruding from one surface (lower surface) of the main body 290 (see FIG. 6). As shown in FIG. 5, the antenna unit 291 is substantially rectangular parallelepiped, and the surface opposite to the main body 290 is convex. The antenna unit 291 also has a built-in antenna. The antenna is, for example, a planar antenna configured with a conductor pattern formed on one surface of a substrate. The antenna is not limited to a planar antenna, and may be a three-dimensional antenna. The wireless module 29 also has a light receiving unit 292 (see FIG. 9) that receives an optical signal. This light receiving unit 292 enables optical communication with the light source unit 2. The light receiving unit 292 is provided on one surface (lower surface) of the main body 290. The light receiving unit 292 is configured to receive an optical signal. In this embodiment, the light receiving unit 292 includes an infrared light receiving element, and the optical signal is an infrared signal. The optical signal is not limited to an optical signal outside the visible light region, such as an infrared signal, but may be an optical signal in the visible light region. The main body 290 is substantially rectangular and has a built-in circuit block. The circuit block has a communication function of transmitting and receiving a wireless signal (a signal mediated by radio waves) via 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] The wireless module 29 is attached to the second surface 2202 of the attachment plate 220 as shown in FIG. 6. At this time, the antenna unit 291 and the light receiving unit 292 are exposed from the opening 222 of the attachment plate 220, the window hole 2231 of the sheet 223, and the space 203 of the light source module 28 as shown in FIG. 9. Therefore, it is possible to reduce the possibility that the wireless signal (radio wave) is blocked by the attachment plate 220, the sheet 223, and the light source module 28, and to improve the accuracy of the wireless communication by the wireless module 29. In addition, it is possible to reduce the possibility that the optical signal (radio wave) is blocked by the attachment plate 220, the sheet 223, and the light source module 28, and to improve the probability that the wireless module 29 receives the optical signal at the light receiving unit 292. In addition, the antenna unit 291 protrudes from the first surface 2201 of the attachment plate 220 through the opening 222, the window hole 2231, and the space 203 as shown in FIG. 9. 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 in the shape of a frame surrounding 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 wiring board 241, and a case 240 that accommodates the power supply circuit (see Figs. 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, and the like. The input connector is electrically connected to the power supply line 140 via a first terminal block 14 described later (see Fig. 10). The power supply circuit converts AC power input from the input connector into DC power, and then outputs the converted DC power from the output connector 242 via an electric 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 tip of the output line.

[0025] The power supply circuit is configured to control the light source module 28 in response to a 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. That is, 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. 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 the first control signal is a turn-off signal, the power supply circuit turns off the light source module 28. The power supply unit 24 enables remote control of the light source unit 2. The power supply circuit is configured to change the setting information in response to an optical signal (second control signal) received by the wireless module 29. The setting information may include, for example, information on the source of the wireless signal received by the wireless module 29. That is, the association between the lighting fixture 1 and the remote controller can be changed by the optical signal.

[0026] The printed wiring board 241 is a long rectangular flat insulating board with wiring conductors (copper foil) formed on the component surface. On the surface of the printed wiring board 241, so-called lead components such as an input connector, an output connector 242, a control connector, a smoothing capacitor, and a choke coil are mounted. On the solder surface of the printed wiring board 241, surface mount components among the electronic components constituting the power supply circuit are mounted. However, the input connector and the control connector are mounted on one end of the printed wiring board 241 in the longitudinal direction, and the output connector 242 is mounted on the other end of the printed wiring board 241 in the longitudinal direction. As shown in FIG. 4 and FIG. 5, the case 240 is formed into a long box shape by a metal plate material. The case 240 accommodates the printed wiring board 241 inside so that the input connector and the output connector 242 are exposed. The power supply unit 24 is screwed to the mounting plate 220 at the front end on the upper surface of the mounting plate 220 so that the longitudinal direction of the case 240 coincides with the left-right direction.

[0027] The cover 21 has translucency. The cover 21 has a square bottom 210 (see FIG. 3), a peripheral wall 211 (see FIG. 5) rising upward from the periphery of the bottom 210, and four claws 212 (see FIG. 4) provided at the upper end of the peripheral wall 211. The bottom 210, the peripheral wall 211, and the four claws 212 are integrally formed from a translucent synthetic resin material such as acrylic resin or polycarbonate resin. At least the bottom 210 and the peripheral wall 211 are configured to diffuse light by applying an embossing process to their surfaces. 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 212 is formed in a hook shape and protrudes upward from the center of the upper end of the peripheral wall 211 in the longitudinal direction (front-rear or left-right direction).

[0028] The cover 21 is attached to the mounting member 22 so that the peripheral wall portion 211 is accommodated inside the side plate 221 of the mounting member 22 (see FIG. 5). Here, in the mounting plate 220 of the mounting member 22, one through hole is provided at a position corresponding to the four claw portions 212 of the cover 21, that is, at the center of the longitudinal direction of each of the four sides of the mounting plate 220. Each claw portion 212 is inserted into the corresponding through hole from the bottom to the top of the mounting plate 220 and hooked on the edge of the through hole on the upper surface of the mounting plate 220 (see FIGS. 4 and 5). As a result, the cover 21 is attached to the mounting plate 220 of the mounting member 22 so that the peripheral wall portion 211 is accommodated inside the side plate 221. In this manner, 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 a length that prevents the shadow of the antenna unit 291 from being cast on the cover 21. In other words, the antenna unit 291 is separated from the bottom 210 of the cover 21 to such an extent that the antenna unit 291 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 turned on.

[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 hook piece 264, a first arm 265, and a second arm 266. The first arm 265 protrudes from the terminal of the coil portion 260 in the radial direction of the coil portion 260. However, multiple points (for example, two points) in the longitudinal direction of the first arm 265 are bent in the same direction (downward) (see FIG. 5). The hook piece 264 is formed in a U-shape when viewed from the front-rear direction, and is connected to the tip of the first arm 265 at one end in the longitudinal direction and to the tip of the second arm 266 at the other end in the longitudinal direction (see FIG. 9). The rear end of the second arm 266 is connected to the terminal portion 263. However, multiple points (for example, two points) in the longitudinal direction of the second arm 266 are bent in the same direction (downward). The terminal portion 263 protrudes from the rear end of the second arm 266 approximately 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 261 (towards the center of the mounting plate 220). In Figs. 4 and 5, the second arm is hidden by the unit cover 23.

[0030] 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 formed from a metal plate such as a galvanized steel plate.

[0031] The flat portion 230 is formed in a flat plate shape. The curved portion 231 is connected to the rear end of the flat portion 230 (the lower end in FIG. 4). The curved portion 231 is curved so as to protrude upward from the rear end of the flat portion 230. However, the front half of the curved portion 231 curves gently as it moves away from the flat portion 230, and the rear half of the curved portion 231 curves sharply downward from the apex of the curved portion 231 (see FIG. 5). The three attachment portions 232 are provided at the front end of the flat portion 230 (the upper end in FIG. 4), the right end of the flat portion 230, and the rear end of the curved portion 231. The curved portion 231 has a rectangular ventilation hole 2310.

[0032] The three mounting parts 232 have almost the same configuration. The mounting part 232 has a first support part 233 and a second support part 234 (see FIG. 5). The first support part 233 is formed in a narrow plate shape (see FIG. 4). The first support part 233 is inserted into the coil part 260 of the mounting spring 26 and can support the coil part 260 rotatably around the axis of the coil part 260 (see FIG. 5). The second support part 234 is formed in a flat plate shape and protrudes downward from the edge of the flat part 230. The second support part 234 has a hole 2340 penetrating in the thickness direction (see FIG. 5). This hole 2340 is formed to a size that allows the terminal part 263 of the mounting spring 26 to be inserted therethrough. The second support part 234 can support the terminal part 263 inserted into the hole 2340.

[0033] The unit cover 23 is fixed to the mounting plate 220 of the mounting member 22 in a state where the mounting springs 26 are attached to each of the two mounting parts 232 that face each other in the front-rear direction with the curved part 231 in between. Here, a plurality of screw fastening parts 226 are provided on the upper surface (second surface 2202) of the mounting plate 220 (see FIG. 5). Each screw fastening part 226 has a truncated cone-shaped protrusion protruding upward from the upper surface of the mounting plate 220 and a female screw provided on the upper surface of the protrusion. The unit cover 23 is fixed to the mounting member 22 by screwing a plurality of fixing screws 227, which are respectively inserted into a plurality of screw insertion holes provided in the unit cover 23, into the female threads of the screw fastening parts 226 in a state where the unit cover 23 is placed on the plurality of screw fastening parts 226 (see FIG. 4). However, a space equal to the height dimension of each screw fastening part 226 is formed between the mounting plate 220 of the mounting member 22 and the flat part 230 of the unit cover 23. This space accommodates power lines that serve as electrical paths between the first terminal block 14 and the power supply unit 24, and signal lines that serve as electrical paths between the wireless module 29 and the power supply unit 24. That is, the unit cover 23 has the function of protecting the power lines and signal lines from the hanging bolts and the like by covering these power lines and signal lines from above. Note that while the curved portion 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 portion 231 through the ventilation holes 2310.

[0034] As shown in FIG. 2, the fixture body 10 has a main body portion 11 that is attached to a construction 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 made of a metal material such as a zinc steel plate and is formed in a shallow box shape with an open bottom. The main body 11 has a square outer shape when viewed from above and below. 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 disposed near the power supply hole 110 on the bottom surface of the main body 11. As shown in FIG. 10, the first terminal block 14 is electrically connected to a power cable 16 inserted into the power supply hole 110. The second terminal block 15 is electrically connected to a signal cable inserted into the power supply hole 110. A plug connector 17 is attached to the tip of a power supply line 140 drawn from the first terminal block 14. A signal line 150 is drawn from the second terminal block 15.

[0036] A plurality of bolt insertion holes 111 are also provided on the bottom surface of the main body 11 (see FIG. 2). These bolt insertion holes 111 are formed in an elliptical shape with the direction of the long axis coinciding with the front-rear direction of the main body 11. The main body 11 is attached to a ceiling by fastening nuts to hanging bolts that are inserted into at least two of the 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 composed of a torsion coil spring having a coil portion 130 and two arms 131, 132. Of the two arms 131, 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 FIG. 2).

[0038] Each hook spring 13 is attached to the main body 11 by a metal fitting 133 (see FIG. 2). The metal fitting 133 is configured to support the coil portion 130 of the hook spring 13 so as to be rotatable around the axis of the coil portion 130 and movable in the axial direction of the coil portion 130.

[0039] Two of the four hook springs 13 are attached side by side in the left-right direction in front of the power supply hole 110 on the bottom surface of the main body 11. The remaining two of the four hook springs 13 are attached side by side in the left-right direction behind the power supply hole 110 on the bottom surface of the main body 11 (see FIG. 2). However, the two hook springs 13 aligned side by side in the left-right direction are arranged so that their second arm portions 132 are adjacent to each other.

[0040] The body cover 12 is made of a metal material such as a zinc steel plate and is formed in a frame shape having an opening 120 that is square when viewed from the top and bottom. The portion (first portion 121) outside the opening 120 in the body cover 12 is formed in a shape that forms a pyramidal surface of a regular square frustum with the opening 120 as the bottom surface (upper base). Furthermore, the portion (second portion 122) outside the first portion 121 in the body cover 12 is formed in a shape that forms a pyramidal surface of a regular square frustum with the periphery of the first portion 121 as the four sides of the bottom surface (upper base). The lower surfaces of the first portion 121 and the second portion 122 are painted with white paint.

[0041] 11, the main body cover 12 has projecting walls (first to fourth projecting walls 123 to 126) projecting upward (toward the main body 11) from each of the four edges of the opening 120. That is, the first projecting wall 123 projects from the front edge of the opening 120, the third projecting wall 125 projects from the rear edge of the opening 120, the second projecting wall 124 projects from the right edge of the opening 120, and the fourth projecting wall 126 projects from the left edge of the opening 120. That is, the first projecting wall 123 and the third projecting wall 125 face each other in the front-rear direction with the opening 120 in between, and the second projecting wall 124 and the fourth projecting wall 126 face each other in the left-right direction with the opening 120 in between.

[0042] The first projecting wall 123 has a flat main piece 1230 that protrudes upward from the front edge of the opening 120, and a fixed piece 1231 that protrudes parallel to the opening 120 from the upper end of the main piece 1230. Similarly, the third projecting wall 125 has a flat main piece 1250 that protrudes upward from the rear edge of the opening 120, and a fixed piece 1251 that protrudes parallel to the opening 120 from the upper end of the main piece 1250 (see FIG. 11). A hook portion 127A is provided at the center in the longitudinal direction (left-right direction) of the main piece 1230 of the first projecting wall 123 (see FIG. 11). A hook portion 127B is provided at the center in the longitudinal direction of the main piece 1250 of the third projecting wall 125 (see FIG. 11). As shown in Fig. 2, the hook portion 127B has an inverted U-shaped through hole penetrating the main piece 1250 of the third projecting wall 125 in the thickness direction (front-rear direction). As shown in Fig. 12, the hook portion 127A has an inverted U-shaped through hole penetrating the main piece 1230 of the first projecting wall 123 in the thickness direction (front-rear direction). Furthermore, the hook portion 127A has a rectangular temporary holding piece 1270 protruding upward from the lower edge of the through hole, and two triangular projections 1271 protruding downward from the upper edge of the through hole.

[0043] Two hook portions (spring hook portions) 128 are provided on each of the fixed piece 1231 of the first projecting wall 123 and the fixed piece 1251 of the third projecting wall 125 (see FIG. 10). In the first projecting wall 123, the two hook portions 128 are located on both sides in the longitudinal direction (left-right direction) of the fixed piece 1231 of the first projecting wall 123. In the third projecting wall 125, the two hook portions 128 are located on both sides in the longitudinal direction (left-right direction) of the fixed piece 1251 of the third projecting wall 125.

[0044] The second projecting wall 124 is formed in a rectangular plate shape. A hook portion 127C is provided at the center in the longitudinal direction (front-rear direction) of the second projecting wall 124 (see FIG. 11). The hook portion 127C provided on the second projecting wall 124 has an inverted U-shaped through-hole that penetrates the second projecting wall 124 in the thickness direction (left-right direction).

[0045] The vertical height of the fourth projecting wall 126 is smaller than the vertical height of the first to third projecting walls 123 to 125 (see FIG. 11). The fourth projecting wall 126 is formed so that the height of both ends 1260 in the longitudinal direction is smaller than the height of the portion excluding both ends 1260 (hooking portion 129) (see FIG. 11). At both ends in the longitudinal direction of the hooking portion 129, a recess 1290 recessed downward is provided.

[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, as the first arms 131 of the four hook springs 13 carried by the main body 11 are hooked onto the hook portions 128 corresponding to each of the hook springs 13 (see Figure 10).

[0047] 1.3 Construction work Next, the work of installing the lighting fixture 1 on the ceiling will be described. First, the worker performing the installation work inserts the power cable 16 and the signal cable into the power supply hole 110 of the main body 11, and then attaches the main body 11 to the ceiling by tightening a nut on the hanging bolt inserted into the bolt insertion hole 111. The worker also connects the power cable 16 drawn from the power supply hole 110 to the first terminal block 14, and connects the signal cable drawn from the power supply 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 to a corresponding one of the four hooks 128. The worker hooks the tips of the first arms 131 of the remaining three hook springs 13 one by one in turn to the hook portions 128 corresponding to each of the hook springs 13. Then, with the tips of the first arms 131 of the four hook springs 13 hooked to the four hook portions 128, the worker lifts the body cover 12 upward so as to approach the body part 11. The first arms 131 of each hook spring 13 are displaced (rotated) upward while still hooked to each hook portion 128. Then, when the lower edge of the body part 11 hits the upper surface of the first portion 121 of the body cover 12, the spring force of the four hook springs 13 hooked to the four hook portions 128 maintains the connection between the body part 11 and the body cover 12 (see FIG. 10).

[0048] The fixture body 10 is attached to the ceiling in the above-mentioned procedure. Next, the procedure for attaching the light source unit 2 to the fixture body 10 will be described. 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 projecting 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 to the fixture body 10. The worker performs the wiring work of 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 while the light source unit 2 is temporarily held on the fixture body 10. After completing the wiring work, 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 projecting wall 125, and then lifts up the light source unit 2 to fit it in the opening 120 of the main body cover 12. When the light source unit 2 is placed in the opening 120, the first arm 261 of each mounting spring 26 is hooked onto the hook portions 127A, 127B of the first and third projecting walls 123, 125, respectively (see FIG. 11). As a result, the light source unit 2 is supported on the fixture body 10 (main body cover 12) by the spring force of the two mounting springs 26. Through the above-mentioned procedure, the installation work of the lighting fixture 1 is completed (see FIG. 1).

[0049] Here, the main body 11 and the main body cover 12 are lighter than the fixture body 10 in which the main body 11 and the main body cover 12 are combined. Therefore, as described above, if the main body 11 and the main body cover 12 can be installed separately, the installation procedure will increase, but the workload of the worker can be reduced. Furthermore, the light source unit 2 is attached to the fixture body 10 attached to the ceiling. As a result, the lighting fixture 1 can improve the workability of the installation work.

[0050] Furthermore, since the light source unit 2 is attached to the body cover 12, it is possible to suppress variation in the positional relationship between the body cover 12 and the light source unit 2, compared to the case where the light source unit 2 is attached to the body 11. As a result, it is possible to suppress deterioration in the appearance quality of the lighting device 1 caused by variation in the positional relationship between the body cover 12 and the light source unit 2.

[0051] 2. Variations The embodiment described above is merely one of various embodiments of the present invention. In addition, the above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present invention can be achieved. Modifications of the above embodiment are listed below.

[0052] 2.1 Modified light source unit In the lighting fixture 1 of the above embodiment, the light source unit 2 to be 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 common to the light source unit 2. Therefore, in the following description of the light source unit 2X, components common to the above-mentioned light source unit 2 are denoted by the same reference numerals, and illustrations and descriptions thereof will be omitted as appropriate.

[0053] 13 to 15, the light source unit 2X has a hook member 27, a portion of which protrudes from the left edge of the mounting member 22 to the outside of the mounting member 22. The hook member 27 has a flat plate portion 270 and a wide portion 271. However, the flat plate 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 formed in a generally rectangular shape. The wide portion 271 protrudes downward from one of the four sides (the left side in FIG. 13) of the flat plate portion 270. The length dimension of the wide portion 271 in the longitudinal direction is greater than the length dimension 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 the longitudinal direction thereof that protrude outward from both ends of the flat plate portion 270 in the longitudinal direction.

[0055] Approximately half of the hook member 27 in the short-side direction (left-right direction in FIG. 13) of the flat plate portion 270 is attached to the upper surface of the mounting plate 220 of the mounting member 22. The flat plate portion 270 is fixed to the mounting plate 220 so as to be sandwiched between the mounting plate 220 and the flat portion 230 of the unit cover 23 (see FIG. 14). Furthermore, the power supply unit 24 is attached to the remaining half of the flat plate portion 270 in the short-side direction. In other words, by attaching the power supply unit 24 to the upper surface of the flat plate portion 270, it is made less susceptible to the effects of heat radiated from the LED module 20 in the lit state.

[0056] In the light source unit 2X, the attachment spring 26 is attached only to the right-most attachment portion 232 (the left-most attachment portion 232 in FIG. 14) of the three attachment portions 232 of the unit cover 23 (see FIG. 14).

[0057] Next, a 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 hook member 27 into the gap between the fourth protruding wall 126 and the bottom surface of the main body 11 from the opening 120, and then hooks the protrusions 272 on both sides of the wide portion 271 to the ends 1260 on both sides of the fourth protruding wall 126. As a result, as shown in FIG. 16, the light source unit 2X is temporarily hung on the fixture body 10. The worker performs wiring work between the power line 140 of the first terminal block 14 and the signal line 150 of the second terminal block 15 and the power supply unit 24 while the light source unit 2 is temporarily hung on the fixture body 10. After completing the wiring work, the worker inserts the first arm 261 of the mounting spring 26 into the through hole of the hook portion 127C provided on the second protruding wall 124, and then lifts up the light source unit 2 to fit it in the opening 120 of the main body cover 12. When the light source unit 2 is placed in the opening 120, the first arm 261 of the mounting spring 26 is hooked to the hook portion 127C of the second projecting wall 124. Also, the hook member 27 moves in a direction away from the opening 120, and is hooked to the hook portion 129 provided on the fourth projecting wall 126 (see FIG. 17). As a result, the light source unit 2X is supported on the fixture body 10 (main body cover 12) by one mounting spring 26 and the hook member 27. Through the above-mentioned procedure, the installation work of the lighting fixture 1 is completed.

[0058] Furthermore, in the lighting fixture 1, a plurality of types of light source units 2, 2X can be detachably attached (combined) to one type of fixture body 10. This allows the variety of fixture bodies 10 to be reduced, thereby reducing manufacturing costs and inventory management costs.

[0059] It should be noted that the hook member 27 does not necessarily have to include the wide portion 271. The flat plate portion 270 is not particularly limited in shape as long as it has a size and shape capable of supporting the power supply unit 24. The hook member 27 may be formed integrally with the mounting plate 220.

[0060] 2.2 Modifications of the light source module Furthermore, the light source unit 2 may have a light source module 28A as shown in Figures 18 and 19. 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 configured by mounting a plurality of light emitting elements 200 on the mounting surface (lower surface) of a square mounting board 201 (201c). The plurality of light emitting elements 200 are arranged in the same manner as in the light source module 28, and are electrically connected to each other via wiring conductors (copper foil) formed on the mounting surface. In addition, a receptacle connector 202 electrically connected to each light emitting element 200 via the wiring conductor is mounted on the mounting surface of the mounting board 201c. The mounting board 201c is attached to the first surface 2201 of the attachment plate 220 by screwing.

[0062] A group G30 of a plurality of light emitting elements 200 is mounted on the mounting board 201c. The group G30 includes a main group G31 and a subgroup G32. The main group G31 includes a plurality of rows (nine rows in FIG. 19) of a plurality of light emitting elements 200 (ten in FIG. 19) arranged at a predetermined interval W14 along a predetermined direction (first direction, left-right direction). The rows of the light emitting elements 200 are arranged at a predetermined interval W15 in the second direction (front-back direction). That is, the main group G31 is a group of light emitting elements 200 arranged in a lattice pattern (a 5×9 matrix pattern in FIG. 19). The subgroup G32 is a group of light emitting elements 200 arranged to surround a rectangular mounting area in which the light emitting elements 200 of the main group G31 are arranged.

[0063] As shown in FIG. 19, the mounting board 201c has a space 203A at a position corresponding to the opening 222 of the attachment plate 220. The space 203A is a hole penetrating the mounting board 201c. Therefore, compared to the case where the gap between the mounting boards 201 is used, it is easier to provide the space 203A at a desired position. In addition, the space 203A is an elongated hole whose dimension in the second direction is longer than the predetermined direction. Here, as shown in FIG. 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 attachment plate 220 is a size such 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 interval 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 board 201c. In addition, the dimension W12 of the opening 222 is equal to or less than the predetermined interval W14. Therefore, it is easier to arrange the light emitting elements 200 at equal intervals in a predetermined direction on the mounting substrate 201c. Also, the space 203A is located between two adjacent light emitting elements in a row of the light emitting elements 200 arranged in a predetermined direction. Therefore, even if the space 203A exists, the multiple light emitting elements 200 can be arranged at equal intervals on the mounting substrate 201c.

[0064] Moreover, the space 203A has a size that fits within the opening 222 in the second direction (front-rear direction). That is, the dimension of the space 203A in the second direction is smaller than the dimension of the opening 222. Therefore, the space 203A is located within the opening 222 in a plane perpendicular to the thickness direction of the mounting plate 220. However, the space 203A is not aligned with any of the light-emitting elements 200 in the second direction. Therefore, the space 203A does not necessarily have to fit within the opening 222 in the second direction.

[0065] The wireless module 29 is attached to the second surface 2202 of the mounting plate 220. At this time, as shown in Fig. 20, the antenna unit 291 and the light receiving unit 292 are exposed from 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 effect as in the above embodiment can be obtained.

[0066] The light source unit 2 may also have a light source module 28B shown in FIG. 21A. The light source module 28B has two LED modules 20 (20d, 20e). Each of the two LED modules 20d, 20e is configured by mounting a plurality of light emitting elements 200 on the mounting surface (lower surface) of a rectangular mounting board 201 (201d, 201e). The mounting boards 201d, 201e are attached to the first surface 2201 of the mounting plate 220 by screwing so as to be arranged at intervals in the thickness direction of the mounting plate 220 and in a direction perpendicular to the predetermined direction (the up-down direction in FIG. 21A). The mounting board 201d has a space 203A like the LED module 20c, but the mounting board 201e does not have the space 203A. That is, in the light source module 28B, the space 203A is provided in one of the plurality of mounting boards 201. With such a light source module 28B, the same effect as the above embodiment can also be obtained. The light source module 28B can also be applied to the light source unit 2X.

[0067] The light source unit 2 may also have a light source module 28C shown in Fig. 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 configured by mounting a plurality of light emitting elements 200 on the mounting surface (lower surface) of a square mounting board 201 (201f to 201i). The four mounting boards 201 (201f to 201i) are attached to a first surface 2201 of an attachment plate 220 by screwing so as to be arranged in a lattice pattern (2 x 2 matrix pattern) at equal intervals (equal to the interval W10). Here, the mounting board 201f (first mounting board 201f) and the mounting board 201g (second mounting board 201g) have one side (first side) 204 of the first mounting board 201f and one side (second side) 205 of the second mounting board 201g facing each other in a predetermined direction. Here, the first mounting board 201f has a notch 206 formed in the first side 204, and the second mounting board 201g has a notch 206 formed in 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, a gap between the bottom surface of the notch 206 of the first mounting board 201f and the bottom surface of the notch 206 of the second mounting board 201g forms a space 203. That is, in the light source module 28C, the gap between two of the mounting boards 201f, 201g among the multiple mounting boards 201 is used as the space 203. With such a light source module 28C, the same effects as those of the above embodiment can be obtained. The light source module 28C can also be applied to the light source unit 2X.

[0068] The light source unit 2 may also have a light source module 28D shown in FIG. 22A. The light source module 28D has two LED modules 20 (20j, 20k). The LED module 20j is configured by mounting a plurality of light emitting elements 200 on the mounting surface (lower surface) of a square mounting board 201 (201j). The LED module 20k is configured by mounting a plurality of light emitting elements 200 on the mounting surface (lower surface) of an L-shaped mounting board 201 (201k). The two mounting boards 201 (first mounting board 201j, second mounting board 201k) are attached to the first surface 2201 of the attachment plate 220 by screws so as to form a square area, as shown in FIG. 22A. Here, the first mounting board 201j and the second mounting board 201k face each other with a gap (equal to the gap W10) between one side (first side) 204 of the first mounting board 201j and one side (second side) 205 of the second mounting board 201k. Here, the first mounting board 201j has a notch 206 formed in the first side 204, and the second mounting board 201k has a notch 206 formed in the second side 205. These notches 206 face each other in a predetermined direction (left-right direction). In the light source module 28D, too, a gap between the bottom surface of the notch 206 of the first mounting board 201j and the bottom surface of the notch 206 of the second mounting board 201k forms the space 203. That is, in the light source module 28D, the gap between the two mounting boards 201j and 201k is used as the space 203. The light source module 28D can provide the same effects as those of the above embodiment. The light source module 28D can also be applied to the light source unit 2X.

[0069] The light source unit 2 may have a light source module 28E shown in FIG. 22B. The light source module 28E has one LED module 20 (20l). The LED module 20l is configured by mounting a plurality of light emitting elements 200 on the mounting surface (lower surface) of a square mounting substrate 201 (201l). The plurality of light emitting elements 200 are arranged in a lattice 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 screwing. 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 extending along the second direction, one end of which is connected to the space 203A, and the other end of which is open to the outside. The light source module 28E can also obtain the same effects as those of the above embodiment. The light source module 28E can also be applied to the light source unit 2X.

[0070] 2.3 Other Modifications Furthermore, the luminaire 1 may be a luminaire that is directly attached to a construction material other than a ceiling (such as a wall), or a recessed luminaire that is recessed into a construction material (such as a ceiling or a wall).

[0071] Furthermore, the mounting member 22 does not necessarily have to include four side plates 221. The mounting plate 220 does not necessarily have to be square, and may be of other shapes such as a rectangle, a circle, or a polygon.

[0072] In addition, 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 may be changed depending on the shape of the antenna portion 291. That is, the opening 222, the window hole 2231, and the space 203 may be polygonal, such as a square, or may be circular, instead of rectangular. In short, the opening 222, the window hole 2231, and the space 203 may be capable of exposing the antenna portion 291. In particular, the space 203 may not include the notch 206 (206a, 206b) formed on at least one of the first side 204 and the second side 205. That is, the notch 206 may not be formed in the mounting board 201. Also, the notch 206 may not be formed on both the first side 204 and the second side 205. In other words, the space 203 may include the notch 206 (206a, 206b) formed in at least one of the first side 204 and the second side 205.

[0073] Furthermore, in the mounting plate 220, the positions of the opening 222, the window hole 2231, and the space 203 are not limited to the above example, and may be changed depending on the position of the wireless module 29. However, when the antenna unit 291 protrudes from the first surface 2201 of the mounting plate 220, it is preferable that the antenna unit 291 is located closer to the center than the outermost light-emitting element 200 of the light source module 28. This is to suppress the antenna unit 291 from being reflected on the cover 21.

[0074] Moreover, the wireless module 29 does not necessarily have to include the light receiving unit 292.

[0075] Moreover, the light source units 2 and 2X do not necessarily have to include the cover 21 and the unit cover 23.

[0076] The arrangement of the light-emitting elements 200 is not limited to the above example. In the above embodiment, for example, the interval (W14) between the light-emitting elements 200 in the predetermined direction (first direction) is smaller than the interval (W15) between the light-emitting elements 200 in the second direction. However, the interval (W14) between the light-emitting elements 200 in the predetermined direction (first direction) may be larger than or the same as the interval (W15) between the light-emitting elements 200 in the second direction. However, it is preferable that the light-emitting elements 200 are arranged so that the lighting device 1 can irradiate light uniformly.

[0077] Furthermore, the number of LED modules 20 is not particularly limited, and the light emitting element 200 does not have to be a light source using an LED, and may be, for example, an organic electroluminescence element.

[0078] Furthermore, the light source units 2 and 2X may have a mounting fixture having a shape different from that of the mounting spring 26. The mounting fixture may be, for example, a protrusion that protrudes from the mounting plate 220 in the direction opposite to the hook member 27.

[0079] In addition, the shapes of the main body 11 and the main body cover 12 in the instrument main body 10 are not limited to those in the above embodiment. For example, the main body 11 and the main body cover 12 in the above embodiment have a square outer shape when viewed from the top and bottom, but may be circular or may be polygonal, such as rectangular. In particular, the shape of the main body cover 12 is not limited to a shape combining two cone surfaces as described above. For example, the main body cover 12 may be flat. In addition, the main body cover 12 does not need to have both the set of the first protruding wall 123 and the third protruding wall 125 and the set of the second protruding wall 124 and the fourth protruding wall 126. In other words, the main body cover 12 only needs to have either the set of the first protruding wall 123 and the third protruding wall 125 or the set of the second protruding wall 124 and the fourth protruding wall 126. In addition, in the main body cover 12, the lower surfaces of the first portion 121 and the second portion 122 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 connected 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 integrally.

[0081] 3. Aspects As is clear from the above-described embodiment and modified examples, the light source unit (2; 2X) of the first aspect includes a metal mounting plate (220), a light source module (28; 28A to 28E), and a wireless module (29). The mounting plate (220) has a first surface (2201) and a second surface (2202) in a thickness direction. The light source module (28; 28A to 28E) is 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 to 28E) has a space (203; 203A) that exposes the antenna portion (291) from the opening (222). The opening (222) is sized so that the space (203; 203A) fits within the opening (222) in a predetermined direction perpendicular to the thickness direction of the mounting plate (220). According to the first aspect, it is possible to improve the strength and the accuracy of wireless communication, and further to ensure insulation performance.

[0082] The light source unit (2; 2X) of the second aspect can be realized by combining with the first aspect. In the second aspect, 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 side (204). The second mounting substrate (201b; 201g; 201k) has a second side (205) facing the first side (204) in the predetermined direction. The space (203) includes a gap between the first side (204) and the second side (205). According to the second aspect, since the gap between the mounting substrates (201) is utilized as the space (203), the space (203) can be formed more easily than when the space (203) is formed in the mounting substrate (201).

[0083] The light source unit (2; 2X) of the third aspect can be realized by combining with the second aspect. In the third aspect, the space (203) includes a notch (206; 206a, 206b) formed on at least one of the first side (204) and the second side (205). According to the third aspect, the interval between the mounting substrates (201) can be narrowed, and the distance between the light emitting elements (200) of the different mounting substrates (201) can be shortened.

[0084] The light source unit (2; 2X) of the fourth aspect can be realized by combining with the second or third aspect. In the fourth aspect, 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 surface of the first mounting board (201a; 201f; 201j) opposite to the mounting plate (220). The second group (G20) is a group of light emitting elements (200) mounted on the surface of the second mounting board (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 a predetermined interval (W14) along the predetermined direction. The second group (G20) includes one or more rows of light-emitting elements (200) arranged at the predetermined interval (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 aspect, it is easy to arrange the light-emitting elements (200) at equal intervals in the predetermined direction across different mounting substrates (201).

[0085] The light source unit (2;2X) of the fifth aspect can be realized by combining it with the fourth aspect. In the fifth aspect, the dimension (W12) of the opening (222) in the predetermined direction is equal to or smaller than the predetermined interval (W14). According to the fifth aspect, it becomes easier to arrange the light emitting elements (200) at equal intervals in the predetermined direction across different mounting substrates (201).

[0086] The light source unit (2; 2X) of the sixth aspect can be realized by combining with the first aspect. In the sixth aspect, the light source module (28A; 28B; 28E) has a mounting substrate (201c; 201d; 201l). The space (203A) is a hole penetrating the mounting substrate (201c; 201d; 201l). According to the sixth aspect, it is easier to provide the space (203A) at a desired position compared to the case where a gap between the mounting substrates (201) is used.

[0087] The light source unit (2; 2X) of the seventh aspect can be realized by combining it with the sixth aspect. In the seventh aspect, the light source module (28A; 28B; 28E) includes a group (G30) of light emitting elements (200) mounted on the surface of the mounting board (201c; 201d; 201l) opposite to the attachment plate (220). The group (G30) of the 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 the 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 aspect, it is easy to arrange the light emitting elements (200) on the mounting board (201) at equal intervals in the predetermined direction.

[0088] The light source unit (2;2X) of the eighth aspect can be realized by combining it with the seventh aspect. In the eighth aspect, the dimension (W12) of the opening (222) in the predetermined direction is equal to or smaller than the predetermined interval (W14). According to the eighth aspect, it becomes easier to arrange the light emitting elements (200) on the mounting board (201) at equal intervals in the predetermined direction.

[0089] The light source unit (2; 2X) of the ninth aspect can be realized by combining with the first aspect. In the ninth aspect, the light source module (28; 28A to 28E) further includes a cover (21). The cover (21) is translucent and is attached to the first surface (2201) of the mounting plate (220) so as to cover the light source module (28, 28A to 28E). The antenna part (291) protrudes from the first surface (2201) of the mounting plate (220) through the opening (222) and the space (203; 203A). A distance (L10) between the cover (21) and the antenna part (291) is a length at which the shadow of the antenna part (291) is not cast on the cover (21). According to the ninth aspect, it is possible to suppress a decrease in the illumination performance of the light source unit (2; 2X) while improving the accuracy of wireless communication by the wireless module (29).

[0090] The light source unit (2; 2X) of the tenth aspect can be realized by combining with the ninth aspect. In the tenth aspect, the light source module (28; 28A-28E) includes a row of light-emitting elements (200) aligned 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 aspect, it becomes easier to arrange the light-emitting elements (200) at equal intervals in the predetermined direction.

[0091] The light source unit (2; 2X) of the eleventh aspect can be realized by combining with any one of the first to tenth aspects. In the eleventh aspect, the wireless module (29) has a light receiving unit (292) that receives an optical signal. The light receiving unit (292) is exposed from the opening (222) and the space (203; 203A). According to the eleventh aspect, optical communication with the light source unit (2; 2X) is possible.

[0092] The light source unit (2; 2X) of the twelfth aspect can be realized by combining it with any one of the first to eleventh aspects. In the twelfth aspect, the light source unit (2; 2X) further includes a lighting circuit (24). The wireless module (29) is configured to receive a wireless signal through the antenna portion (291). The lighting circuit (24) is configured to control the light source modules (28, 28A to 28E) in response to the wireless signal received by the wireless module (29). According to the twelfth aspect, the light source unit (2; 2X) can be remotely controlled.

[0093] The lighting fixture (1) of the thirteenth aspect includes a light source unit (2; 2X) according to any one of the first to twelfth aspects, and a fixture body (10) supporting the light source unit (2; 2X). According to the thirteenth aspect, it is possible to improve the strength and the accuracy of wireless communication, and furthermore, it is possible to ensure insulation performance. [Explanation of symbols]

[0094] 1 Lighting equipment 10. Equipment body 2, 2X light source unit 201, 201a to 201l Mounting board 203, 203A space 204 Side 1 205 Side 2 206, 206a, 206b Notch 21 Cover 220 Mounting plate 2201 1st page 2202 2nd page 222 Aperture 24 Power supply unit (lighting circuit) 28, 28A~28E Light source module 29 Wireless Module 291 Antenna section 292 Light receiving part G10, G20, G30 Groups L10 distance W11 Dimensions W12 Dimensions W14 Predetermined interval W16 Dimensions

Claims

1. A light source unit; A fixture body supporting the light source unit; Equipped with The fixture body has an opening into which the light source unit is accommodated, The light source unit includes: a metal mounting plate having a first surface and a second surface in a thickness direction; a light source module attached to the first surface of the mounting plate; a wireless module attached to the second surface of the mounting plate; Equipped with The wireless module includes: an antenna unit for receiving a wireless signal using radio waves as a medium; A light receiving unit that receives an optical signal; having the mounting plate has an opening penetrating the mounting plate in the thickness direction, for allowing the antenna portion to receive the wireless signal and for allowing the light receiving portion to receive the optical signal; The antenna unit and the light receiving unit are arranged to be aligned along the longitudinal direction of the elongated opening. Lighting fixtures.

2. the wireless module further includes a main body in which the light receiving unit is provided, The main body is integrally formed with the antenna.

2. The lighting fixture of claim 1.

3. the light source module includes a first mounting substrate, a second mounting substrate, a first group of light emitting elements mounted on a surface of the first mounting substrate opposite to the mounting plate, and a second group of light emitting elements mounted on a surface 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 a predetermined direction perpendicular to the thickness direction of the mounting plate, The second group includes one or more rows of light emitting elements arranged at the predetermined intervals along the predetermined direction.

3. A lighting fixture according to claim 1 or 2.

4. the light source module has a mounting substrate and includes a group of light emitting elements mounted on a surface of the mounting substrate opposite to the attachment plate; The group of light emitting elements includes a row of light emitting elements arranged at a predetermined interval along a predetermined direction perpendicular to the thickness direction of the mounting plate. A lighting fixture according to any one of claims 1 to 3.

5. The light source unit further includes a light-transmitting 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 4.

6. The light source unit further includes a lighting circuit. The lighting circuit is configured to control the light source module in response to the wireless signal received by the wireless module.

6. A lighting fixture according to any one of claims 1 to 5.

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