JP2024122675A - Lighting fixtures - Google Patents

Abstract

[Problem] The object of the present disclosure is to improve wireless communication performance. [Solution] A lighting device A1 includes a light source module 20, a communication unit 3, and a support member 21. The light source module 20 includes a substrate 200 and one or more LEDs 201 provided on a surface 200A of the substrate 200. The communication unit 3 includes an antenna and performs at least one of transmission and reception of radio waves via the antenna. The substrate 200 includes a conductor region 200B on the surface 200A, in which a conductor for supplying power to the LEDs 201 is formed. The communication unit 3 has an antenna disposed at a position overlapping the conductor region 200B when viewed from a direction facing the surface 200A of the substrate 200. The support member 21 is formed of a material having electrical conductivity, and has an opening 218 at a position not overlapping the conductor region 200B when viewed from a direction facing the surface 200A of the substrate 200. [Selected Figure] Figure 4

Description

This disclosure relates to lighting fixtures, and more specifically, to lighting fixtures capable of wireless communication.

As a conventional example, the lighting fixture described in Patent Document 1 is given as an example. The lighting fixture described in Patent Document 1 (hereinafter referred to as the conventional example) comprises a light source unit and a fixture body having a storage recess for storing a part of the light source unit.

The light source unit includes a light source substrate, a wireless section having an antenna, and a support on whose upper surface the wireless section is disposed. The support is a metal plate and is disposed so that the light source substrate overlaps with its lower surface. The support also has an opening through which the upper surface of the light source substrate is exposed. A wiring pattern is formed on the upper surface of the light source substrate exposed through the opening.

In conventional examples, wireless communication performance is improved by allowing the radio antenna to receive radio waves through an opening in the metal support.

JP 2022-71508 A

However, in the above conventional example, since a conductor (wiring pattern) is present on the upper surface of the light source substrate exposed through the opening, radio waves passing through the opening may be attenuated by the conductor, resulting in a decrease in wireless communication performance.

The objective of this disclosure is to provide a lighting fixture that can improve wireless communication performance.

A lighting device according to one aspect of the present disclosure includes a light source, a wireless communication unit, and a support member. The light source includes a substrate and one or more light-emitting elements provided on the surface of the substrate. The wireless communication unit includes an antenna and transmits and receives radio waves via the antenna. The support member has a first surface and a second surface opposite to the first surface, supports the light source on the first surface side, and arranges the wireless communication unit on the second surface side. The substrate has a conductor region on the surface where a conductor for supplying power to the light-emitting element is formed. The wireless communication unit arranges the antenna at a position overlapping the conductor region when viewed from the direction facing the surface. The support member is formed of a conductive material, and has an opening penetrating from the first surface to the second surface at a position not overlapping the conductor region when viewed from the direction facing the surface.

The lighting device disclosed herein has the advantage of being able to improve wireless communication performance.

FIG. 1 is a perspective view of a lighting fixture according to an embodiment of the present disclosure. FIG. 2 is an exploded perspective view of the lighting fixture. FIG. 3 is a cross-sectional view of the above lighting fixture. 4A and 4B are bottom and top views of a main part of a light source unit in the lighting fixture of the above; FIG. 5 is a front view of the lighting fixture with a portion of the fixture body omitted. FIG. 6 is another front view of the lighting fixture with a portion of the fixture body omitted. FIG. 7 is a circuit block diagram of a power supply device and a communication unit in the above lighting fixture. FIG. 8 is a plan view of a light source unit in the above lighting fixture. 9A and 9B are perspective views of the communication unit in the lighting fixture as viewed obliquely from above and below, respectively. FIG. 10 is an exploded perspective view of the communication unit in the lighting fixture. FIG. 11 is a plan view of the lighting fixture of the above embodiment with the case cover of the communication unit omitted. FIG. 12 is a perspective view of a main part of a light source unit in the above lighting fixture. FIG. 13 is a bottom view of a main part of a light source unit in the first modification of the above lighting fixture. FIG. 14 is a cross-sectional perspective view of a main part of a light source unit in the second modification of the above lighting fixture. FIG. 15 is a cross-sectional view of a main part of a light source unit in a third modification of the above lighting fixture. FIG. 16 is an exploded perspective view of a fourth modified example of the lighting fixture.

The lighting device according to the embodiment of the present disclosure will be described in detail below with reference to the drawings. However, each figure described in the following embodiment is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. Note that the configuration described in the following embodiment is merely one example of the present disclosure. The present disclosure is not limited to the following embodiment, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

(1) Overview A lighting device A1 according to an embodiment includes a light source (light source module 20), a wireless communication unit (communication unit 3), and a support member 21 (see FIGS. 4A and 4B).

The light source module 20 has a substrate 200 and one or more light-emitting elements (LEDs 201) provided on the surface 200A of the substrate 200 (see FIG. 4A). However, the light-emitting elements are not limited to LEDs, and may be light-emitting elements other than LEDs, such as organic electroluminescence elements and laser diodes.

The communication unit 3 has an antenna 31 and performs at least one of transmitting and receiving radio waves via the antenna 31 (see Figures 7 and 10).

The support member 21 has a first surface (lower surface 210A of the bottom plate 210) and a second surface (upper surface 210B of the bottom plate 210) opposite to the first surface. The support member 21 supports the light source module 20 on the first surface side and has the communication unit 3 arranged on the second surface side (see Figures 4A and 4B). However, in Figure 4B, the case 33 of the communication unit 3 described later is not shown. In this embodiment, "arranging the communication unit 3 on the second surface side" includes not only a state in which the communication unit 3 is attached to the second surface of the support member 3, but also a state in which the communication unit 3 is attached to another member (power supply case 41) attached to the second surface of the support member 3 as described later.

The substrate 200 has a conductor region 200B on its surface 200A, where a conductor is formed to supply power to the LED 201 (see FIG. 4A). The communication unit 3 has an antenna 31 disposed at a position overlapping the conductor region 200B when viewed from the direction facing the surface 200A of the substrate 200 (the direction perpendicular to the paper surface of FIG. 4A) (see FIG. 4B and FIG. 10).

The support member 21 is made of a conductive material and has an opening 218 that penetrates from the first surface to the second surface at a position that does not overlap with the conductor region 200B when viewed from the direction facing the surface 200A of the substrate 200 (see Figures 4A and 4B). The conductive material that forms the support member 21 is, for example, a metal.

Here, the opening 218 of the support member 21 can function as a so-called slot antenna. In other words, the opening 218 of the support member 21 (actually the opening 218 and its periphery 2180) is electromagnetically coupled to the antenna 31 of the communication unit 3, and radiates radio waves emitted from the antenna 31 to the outside, and radiates radio waves arriving from the outside toward the antenna 31.

The lighting device A1 according to the embodiment has an opening 218 penetrating the support member 21 from the first surface to the second surface at a position that does not overlap with the conductor region 200B of the substrate 200 when viewed from the direction facing the surface 200A of the substrate 200. Therefore, the lighting device A1 according to the embodiment can cause the opening 218 to function as a slot antenna, and can reduce the attenuation of radio waves caused by the conductor region 200B of the substrate 200. As a result, the lighting device A1 according to the embodiment can improve wireless communication performance compared to the conventional example.

(2) Details A lighting fixture A1 according to an embodiment (hereinafter, simply referred to as lighting fixture A1) includes a light source unit 2, a fixture body 1, a communication unit 3, and a power supply unit 4, as shown in FIGS.

Lighting fixture A1 is directly attached to, for example, the ceiling of an office in an office building. However, the location where lighting fixture A1 is installed is not limited to the ceiling of the office, and it may be on the wall or floor of an office or a room other than an office. In the following description, unless otherwise specified, the up-down, front-back, and left-right directions indicated by arrows in Figure 2 are defined as the up-down, front-back, and left-right directions of lighting fixture A1.

(2-1) Instrument Body The instrument body 1 has a main portion 10 formed in a long rectangular shape, and a pair of side portions 11 protruding downward from both ends (front end and rear end) along the longitudinal direction (left-right direction) of the main portion 10 (see Figs. 2 and 3). Each of the pair of side portions 11 is formed in a long rectangular shape. The main portion 10 and the pair of side portions 11 are integrally formed in a square gutter shape by bending a long metal plate.

The main part 10 has two power supply holes 111, two mounting holes 112, and two hook holes 113 (see FIG. 2). All three of these holes (power supply holes 111, mounting holes 112, and hook holes 113) penetrate the main part 10 in the thickness direction (vertical direction). The areas surrounding the two mounting holes 112 in the main part 10 are each formed into an elliptical truncated cone shape that protrudes upward from the top surface of the main part 10.

The upper surface of the main part 10 is provided with a number of protrusions 110 arranged at intervals along the longitudinal direction of the main part 10 (see FIG. 3). Each of the protrusions 110 is formed in a hemispherical shape and protrudes upward. When the device body 1 is attached to the installation surface S1, the tips of the protrusions 110 come into contact with the installation surface S1, forming a gap G1 between the installation surface S1 and the main part 10 (see FIG. 3).

The power supply holes 111 are provided at both ends of the main part 10 in the longitudinal direction (left-right direction) (see FIG. 2). Each power supply hole 111 is circular. A bushing is fitted into each power supply hole 111. The bushing is formed into a cylindrical shape from a synthetic resin material. For example, a power supply cable C1 that is sent from an external power source P1 (see FIG. 7) such as a commercial power system or another lighting fixture is inserted into the power supply hole 111 at the left end. On the other hand, a power supply cable C2 for sending and wiring to another lighting fixture is inserted into the power supply hole 111 at the right end. In the following description, the power supply cable C1 may be referred to as the first power supply cable C1 and the power supply cable C2 as the second power supply cable C2.

Here, a first terminal block 14A and a second terminal block 14B are attached to the underside of the main unit 10, one at a time, at both ends closer to the center in the longitudinal direction than the power supply hole 111 (see FIG. 2). However, the first terminal block 14A and the second terminal block 14B are terminal blocks of the same structure.

The first power cable C1 is electrically connected to the primary terminal of the first terminal block 14A (see FIG. 5), and the second power cable C2 is electrically connected to the primary terminal of the second terminal block 14B (see FIG. 6).

An electric wire 15A connected to the positive electrode of the secondary terminal of the first terminal block 14A, an electric wire 15B connected to the secondary terminal of the second terminal block 14B, and an electric wire 15C connected to the plug connector 150 are connected by a closed end connector 151A (see Figures 5 and 6).

An electric wire 15D connected to the negative electrode of the secondary terminal of the first terminal block 14A, an electric wire 15E connected to the negative electrode of the secondary terminal of the second terminal block 14B, and an electric wire 15F connected to the plug connector 150 are connected by a closed end connector 151B (see Figs. 5 and 6). The two electric wires 15B and 15E connected to the second terminal block 14B are inserted into an insulating tube 154 (see Figs. 5 and 6). Note that in Fig. 5, the two closed end connectors 151A and 151B are shown protruding from the device body 1, but in reality they are housed between a pair of side portions 11 of the device body 1.

The ground wire 15G connected to the plug connector 150 is connected to the main unit 10 via a crimp terminal 153. The two electric wires 15C and 15F connected to the plug connector 150 and the ground wire 15G are inserted into an insulating tube 152 (see FIG. 5).

Two mounting holes 112 are provided on the main part 10, one to the right of the first terminal block 14A and one to the left of the second terminal block 14B (see FIG. 2). Suspension bolts B1 protruding from the installation surface S1 are inserted into each of the two mounting holes 112 (see FIG. 2). Then, the fixture body 1 is fixed to the installation surface S1 by tightening a nut N1 onto the suspension bolt B1 inserted into the mounting hole 112.

The two hanging holes 113 are round holes that are located closer to the center than the two mounting holes 112 (see FIG. 2). The ends of two strings (not shown) for temporarily hanging the light source unit 2 are inserted into these two hanging holes 113 and hooked.

(2-2) Mounting Spring The fixture body 1 has two mounting springs 12. Each of the two mounting springs 12 serves to mount the light source unit 2 to the fixture body 1. The mounting springs 12 are provided between the first terminal block 14A and the adjacent mounting hole 112 in the main part 10, and between the second terminal block 14B and the adjacent mounting hole 112 (see FIG. 2). Each mounting spring 12 is formed into a U-shape by bending a strip-shaped metal plate. These two mounting springs 12 are fixed to the main part 10 by screwing. Each mounting spring 12 is deformable (flexible) along the short side direction (front-rear direction) of the fixture body 1.

(2-3) Light Source Unit The light source unit 2 includes a light source module 20, a support member 21, a cover 22, a power supply unit 4, a communication unit 3, and a pair of end members 23 (see FIG. 2).

(2-3-1) Light Source Module The light source module 20 has two substrates 200, a plurality of light emitting elements (LEDs 201) mounted on the surface 200A (lower surface) of each substrate 200, and a connection member 24 provided on each substrate 200 (see FIG. 2). Each substrate 200 is formed in a long rectangular shape. A conductor for supplying power to the plurality of LEDs 201 is formed on the surface 200A of each substrate 200. The conductor is formed in the center of the short side direction on the surface 200A of the substrate 200. In the following description, the region on the surface 200A of the substrate 200 where the conductor for power supply is formed is referred to as a conductor region 200B (see FIG. 4A). Also, the region on the surface 200A of the substrate 200 where the conductor for power supply is not formed is referred to as a non-conductor region 200C (see FIG. 4A). The non-conductor regions 200C are arranged on both sides of the conductor region 200B in the short side direction of the substrate 200. The conductors of the two boards 200 are connected via connectors mounted on the longitudinal ends of each board 200 .

The multiple LEDs 201 include, for example, white LEDs for lighting with a bulb color and white LEDs for lighting with a daylight color. The multiple LEDs 201 are arranged so that the LEDs 201 of different light emitting colors are alternately arranged in a row along the longitudinal direction of the substrate 200. The multiple LEDs 201 may be composed of only white LEDs for lighting with the same color, or may include white LEDs for lighting with three or more colors. Alternatively, the multiple LEDs 201 may include LEDs with light emitting colors other than white, such as red, green, and blue.

The connection members 24 are members that electrically connect the power supply device 40 and the light source module 20, which will be described later, and are provided at the right end of the right-side board 200 and the left end of the left-side board 200 (see FIG. 2). Each connection member 24 has a receptacle connector and a plug connector that are mounted on the board 200. The receptacle connector is electrically connected to a conductor formed on the surface 200A of the board 200. The receptacle connector is inserted into a through hole provided in each board 200 and protrudes upward from the upper surface of the board 200. Each plug connector is electrically connected to the power supply device 40 via an output line. The plug connector is electrically and mechanically connected to the receptacle connector, so that the light source module 20 (LED 201) is electrically connected to the power supply device 40.

(2-3-2) Power Supply Unit The power supply unit 4 includes a power supply device 40 configured with a printed circuit, and a power supply case 41 that houses the power supply device 40 (see FIGS. 2 and 8).

Figure 7 shows the circuit configuration of the power supply device 40. The power supply device 40 includes a power conversion circuit 400, a first constant current circuit 401, a second constant current circuit 402, a control circuit 403, etc.

The power conversion circuit 400 has, for example, a rectifier circuit such as a diode bridge, a boost chopper circuit (power factor correction circuit), and the like. The power conversion circuit 400 converts AC power supplied from an external power source P1 into DC power. The external power source P1 is, for example, a commercial power system, and supplies an AC voltage and AC current with an effective value of 100 V or 200 V. However, instead of the boost chopper circuit, the power conversion circuit 400 may also have a switching power supply circuit with a power factor correction function, such as a step-down chopper circuit, a step-up/step-down chopper circuit, or a flyback converter.

The first constant current circuit 401 and the second constant current circuit 402 have, for example, a step-down chopper circuit (buck converter). The first constant current circuit 401 steps down the DC voltage output from the power conversion circuit 400 and applies it to the incandescent LED 201 of the light source module 20, and adjusts the DC current flowing through the incandescent LED 201 of the light source module 20. The second constant current circuit 402 steps down the DC voltage output from the power conversion circuit 400 and applies it to the daylight LED 201 of the light source module 20, and adjusts the DC current flowing through the daylight LED 201 of the light source module 20. However, the first constant current circuit 401 and the second constant current circuit 402 may be equipped with various chopper circuits, series regulators, etc. instead of the step-down chopper circuit.

The positive output terminal of the first constant current circuit 401 is connected to the right connection member 24 (plug connector) via output line L11, and the negative output terminal of the first constant current circuit 401 is connected to the left connection member 24 (plug connector) via output line L12 (see FIG. 8). The positive output terminal of the second constant current circuit 402 is connected to the right connection member 24 (plug connector) via output line L21, and the negative output terminal of the second constant current circuit 402 is connected to the left connection member 24 (plug connector) via output line L22 (see FIG. 8).

The control circuit 403 has, for example, a microcontroller. The control circuit 403 controls the step-down chopper circuit of the first constant current circuit 401 so that the DC current supplied from the first constant current circuit 401 to the light bulb color LED 201 of the light source module 20 matches the target value. The control circuit 403 also controls the step-down chopper circuit of the second constant current circuit 402 so that the DC current supplied from the second constant current circuit 402 to the daylight color LED 201 of the light source module 20 matches the target value. The control circuit 403 changes each target value of the DC current supplied to each of the light bulb color and daylight color LED 201 of the light source module 20 individually in response to a control signal received from the communication unit 3 described later.

The power supply case 41 is made of a metal plate and is formed into a long box shape with an open bottom. The power supply case 41 houses the printed circuit board that constitutes the power supply device 40. A pair of electric wires 43 are drawn out from one end (left end) of the power supply case 41 in the longitudinal direction. The pair of electric wires 43 are connected to a receptacle connector 44 (see FIG. 8). The receptacle connector 44 is connected to a plug connector 150. In other words, the power supply device 40 is electrically connected to an external power supply P1 via the plug connector 150, the receptacle connector 44, and the pair of electric wires 43. The open bottom of the power supply case 41 is covered with an insulating sheet having electrical insulation properties.

Furthermore, a plurality of electric wire holding portions 411 are provided on the bottom 410 of the power supply case 41 (see FIG. 8). These electric wire holding portions 411 are formed into an L-shape by being cut and raised from the bottom 410. These electric wire holding portions 411 are arranged at intervals along the longitudinal direction (left-right direction) of the power supply case 41. These electric wire holding portions 411 hold the negative output line L12 of the first constant current circuit 401 and the negative output line L22 of the second constant current circuit 402 (see FIG. 8).

The power supply unit 4 is attached by screwing the bottom surface of the power supply case 41 to the top surface of the support member 21 of the light source unit 2 with the bottom surface of the power supply case 41 facing the support member 21 (see FIG. 8). However, the method of fixing the power supply case 41 to the support member 21 is not limited to screwing, and any suitable fixing method such as crimping can be used. In addition, when attached to the support member 21, the opening (bottom surface) of the power supply case 41 is blocked by the support member 21.

(2-3-3) Support Member The support member 21 has a bottom plate 210 formed in an elongated plate shape, and a pair of side plates 211 standing upward from a pair of side ends (front end and rear end) along the longitudinal direction (left-right direction) of the bottom plate 210 (see FIGS. 2 and 3). The pair of side plates 211 are formed in an elongated rectangular shape.

The support member 21 also has a positioning piece 212, a locking piece 213, a pair of cover mounting pieces 214, a pair of protrusions 215, and a pair of hooks 216 (see Figure 3).

The positioning piece 212 is formed in a rectangular column shape protruding downward from the rear end of the lower surface of the bottom plate 210. The locking piece 213 is formed in an L-shape protruding downward from the front end of the lower surface of the bottom plate 210. The positioning piece 212 and the locking piece 213 are each formed over the entire length of the bottom plate 210 in the longitudinal direction of the bottom plate 210 so as to be parallel to each other. The board 200 of the light source module 20 is inserted into the gap between the locking piece 213 and the bottom plate 210, and the board 200 is locked to the locking piece 213 (see FIG. 3). The positioning piece 212 positions the board 200 in the front-rear direction of the bottom plate 210. The board 200 is screwed to the bottom plate 210 by a plurality of screws 217 (see FIG. 4A).

The pair of cover mounting pieces 214 are each formed in an L-shape and protrude downward from each side end along the longitudinal direction of the bottom plate 210. A pair of mounting portions 222 of the cover 22 are hooked onto each cover mounting piece 214, as described below.

The pair of hooks 216 each protrude inward from approximately the center in the vertical direction on the inner surface of the pair of side plates 211 over the entire length of each side plate 211 in the longitudinal direction. However, the tip of each hook 216 is bent downward (see Figure 3). The pair of hooks 216 hook onto the tip of each of the two mounting springs 12 attached to the device body 1.

The pair of protrusions 215 each protrude inward from the lower end portion of the inner surface of the pair of side plates 211 over the entire longitudinal length of each side plate 211. The bottom plate 210, the pair of side plates 211, the positioning piece 212, the locking piece 213, the pair of cover mounting pieces 214, the pair of protrusions 215, and the pair of hooks 216 are integrally formed by extrusion molding of a metal material such as an aluminum alloy.

In addition, a through hole is provided in the bottom plate 210 of the support member 21 at a position facing the connection member 24 of each board 200 in the vertical direction. The connection member 24 protrudes above the bottom plate 210 through the through hole in the bottom plate 210. The support member 21 has a protective cover 25 that covers the upper part of the through hole to protect the connection member 24 (see Figures 4B and 8). The protective cover 25 prevents unnecessary external force from being applied to the electric wire (output wire) connected to the connection member 24, causing malfunctions in the connection member 24 and the electric wire.

Furthermore, the support member 21 has a pair of locking parts 26 (see FIG. 8). The locking parts 26 are parts for locking a string for temporary hanging, which will be described later. The locking parts 26 have a main piece 260, a pair of side pieces 261A and 261B, a hook piece 262, and a fixed piece 263 (see FIG. 4B and FIG. 12). The main piece 260 is formed in an L-shaped flat plate shape. The main piece 260 has a pair of hook holes 265 in the shape of a bell-shaped hole. One side piece 261A is formed in a rectangular flat plate shape and protrudes downward from one end (left end) of the main piece 260 in the longitudinal direction (left-right direction). The other side piece 261B is formed in a rectangular flat plate shape that is shorter than the side piece 261A and protrudes downward from one end in the short direction at the other end (right end) of the main piece 260 in the longitudinal direction (see FIG. 12). The fixed piece 263 is L-shaped when viewed from the longitudinal direction of the main piece 260, and protrudes downward from one end of the main piece 260 in the lateral direction. A circular hole penetrates the fixed piece 263. The hook piece 262 is V-shaped when viewed from the longitudinal direction of the main piece 260, and protrudes downward from the other end of the main piece 260 in the lateral direction (see FIG. 12).

The locking part 26 is attached to the support member 21 by hooking the hook piece 262 onto the protrusion 215 of one side plate 211 and screwing the fixing screw 266 inserted into the hole of the fixing piece 263 into the screw hole of the bottom plate 210 (see Figures 4B and 12). The locking part 26 contacts the support member 21 on both sides of the opening 218 in the short direction (front-to-back direction) of the opening 218 (see Figures 4B and 12). This allows the lighting device A1 to suppress rattling of the locking part 26 relative to the support member 21.

Here, the bottom plate 210 has an opening 218 that penetrates the bottom plate 210 in the thickness direction (up-down direction) (see Figures 3 and 4B). The opening 218 is formed in a long oval shape when viewed from the thickness direction of the bottom plate 210 (see Figure 4B). The longitudinal direction of the opening 218 coincides with the longitudinal direction (left-right direction) of the bottom plate 210. Thus, in the lighting device A1, the opening 218 is formed in an oval shape (long hole shape) along the longitudinal direction of the bottom plate 210 (support member 21), so that the length of the opening 218 can be easily adjusted.

(2-3-4) Cover The cover 22 has a front wall 220, a pair of side walls 221, and a pair of mounting parts 222 (see FIG. 2 and FIG. 3). The front wall 220 is formed in a long rectangular shape. The pair of side walls 221 are each formed in a long rectangular shape and protrude upward from both ends (front end and rear end) along the longitudinal direction of the front wall 220. The pair of mounting parts 222 are each formed in a long U-shape and protrude inward from the upper end of each side wall 221 over the entire length of the longitudinal direction of the side wall 221. Here, the front wall 220, the pair of side walls 221, and the pair of mounting parts 222 are preferably formed integrally by extrusion molding of a synthetic resin having translucency such as polycarbonate resin or acrylic resin. In addition, the cover 22 is preferably formed in a milky white color by mixing a filler with a synthetic resin material in order to diffuse the light emitted from the light source module 20.

The cover 22 is attached to the support member 21 by hooking the pair of mounting portions 222 one by one onto each of the pair of cover mounting pieces 214 of the support member 21 (see FIG. 3). The cover 22 attached to the support member 21 covers the light source module 20 attached to the underside of the bottom plate 210.

(2-3-5) End Member The end member 23 has a cover end portion 230 that covers the longitudinal end of the cover 22, an end cap portion 231 that covers the longitudinal end of the support member 21, and a mounting fixture 232 for attaching the end member 23 to the support member 21 (see FIG. 2).

The end members 23 are attached to the support member 21 by screwing the mounting fixtures 232 to the support member 21. By attaching the two end members 23 to the support member 21, the openings at both ends of the longitudinal direction of the cover 22 and the openings at both ends of the longitudinal direction of the support member 21 are closed (see FIG. 1).

(2-3-6) Communication Unit The communication unit 3 has a radio circuit 30, an antenna 31, a circuit board 32 on which the radio circuit 30 and the antenna 31 are formed, and a case 33 that houses the circuit board 32 (see Figures 3 and 7 to 11).

The circuit board 32 is made of a printed wiring board in which wiring conductors are printed on a rectangular insulating substrate (see FIG. 10). In other words, the wireless circuit 30 is made of a printed circuit including a wireless communication module IC300 with a built-in microcontroller (see FIG. 7 and FIG. 10). Note that the shape of the circuit board 32 is not limited to a rectangle, and may be any other shape such as a polygon other than a rectangle, or a circle.

The antenna 31 is configured to emit electromagnetic waves (e.g., radio waves in the 920 MHz or 2.4 GHz band) into space and to receive electromagnetic waves from space. The antenna 31 is, for example, a so-called pattern antenna formed of a conductor printed on a circuit board 32 (see FIG. 10). The antenna 31 is formed in an L-shape at one end (lower part) of the surface of the circuit board 32. Thus, the lighting device A1 can achieve a miniaturization of the communication unit 3 by forming the antenna 31 and the wireless circuit 30 on the same circuit board 32. However, the antenna 31 is not limited to a pattern antenna, and may be a patch antenna (microstrip antenna), chip antenna, rod antenna, film antenna, etc.

The wireless circuit 30 extracts a wireless signal from the radio waves received by the antenna 31 and obtains control information (control command) from the wireless signal. Furthermore, the wireless circuit 30 converts the control information into a dimming signal and transmits the converted dimming signal to the control circuit 403 of the power supply device 40. The wireless circuit 30 is capable of not only receiving wireless signals but also transmitting wireless signals. For example, the wireless circuit 30 performs wireless communication conforming to the BLE (Bluetooth (registered trademark) low energy) communication standard. The wireless circuit 30 can receive wireless signals transmitted from a communication unit 3 mounted on another lighting fixture A1, and transmit (relay) a wireless signal including control information and the like contained in the received wireless signal to a communication unit 3 mounted on yet another lighting fixture A1.

A connector 34 is mounted on the circuit board 32 (see FIG. 10). The connector 34 is connected to a pair of power supply lines 341 for supplying power from the power supply device 40 to the wireless circuit 30 and a pair of signal lines 342 for transmitting a dimming signal (see FIG. 11).

The power supply device 40 changes the target value of the direct current supplied to the light source module 20 from the control circuit 403 in response to the dimming signal received from the communication unit 3 via the signal line 342, thereby blinking (switching between on and off), dimming, and adjusting the color of the light source module 20.

The case 33 has a case body 33A and a case cover 33B (see Figures 9A to 11). In the following description, unless otherwise specified, the up-down, left-right, and front-to-back directions indicated by arrows in Figure 9A are defined as the up-down, left-right, and front-to-back directions of the case 33 (communication unit 3).

The case body 33A is made of a box-shaped synthetic resin molded body with one surface (bottom surface) open (see Figures 10 and 11). The mounting part 330 protrudes from the upper end of the left side surface of the case body 33A. The mounting part 330 is formed in a rectangular box shape with an open top surface (see Figure 9B). A round hole 331 is provided on each end of the bottom surface (bottom surface) of the mounting part 330 in the longitudinal direction (front-to-back direction).

In addition, a recess 332 with an open bottom end is provided on each of the front and rear surfaces of the case body 33A (see FIG. 9B). A protrusion 333 is provided on the upper part of the bottom surface of each recess 332. The protrusion 333 is formed in a triangular prism shape that is inclined from bottom to top in a direction away from the bottom surface of the recess 332.

Furthermore, support parts 334 that sandwich and support both left and right ends of the circuit board 32 are provided on the inner side of both the left and right sides of the case body 33A (see FIG. 11). The support parts 334 have grooves with the vertical direction as the longitudinal direction, and the ends of the circuit board 32 are inserted into the grooves to support the circuit board 32 in an upright state (see FIG. 11).

The case body 33A is configured as a synthetic resin molded body made of a synthetic resin material such as polycarbonate resin. However, the case body 33A may be formed of a material other than synthetic resin, including metal, or may be formed of a hybrid material of metal and synthetic resin.

The case cover 33B has a flat cover body 335 and a pair of assembly legs 336 (see FIG. 10). However, the cover body 335 and the pair of assembly legs 336 are integrally formed as a synthetic resin molded body. The pair of assembly legs 336 are formed in an inverted U-shape and protrude upward from the front and rear ends of the cover body 335, respectively (see FIG. 10).

The case cover 33B is attached to the underside of the case body 33A that houses the circuit board 32. That is, the two assembly legs 336 of the case cover 33B are inserted into a pair of recesses 332 of the case body 33A from below the case body 33A, and the upper ends of the assembly legs 336 bend outward while riding on the inclined surfaces of the protrusions 333. Then, when the upper parts of the assembly legs 336 ride over the protrusions 333, the assembly legs 336 are hooked onto the protrusions 333, and the case cover 33B is fixed to the case body 33A (see Figures 9A and 9B).

Here, an electric wire insertion hole 337 is provided on the left side surface of the case 33 (see Figures 9B and 11). A power supply line 341 and a signal line 342 electrically connected to the connector 34 of the circuit board 32 are inserted through the electric wire insertion hole 337.

(2-3-7) Step of Attaching the Power Supply Unit and the Communication Unit to the Support Member Next, the step of attaching the power supply unit 4 and the communication unit 3 to the support member 21 will be described.

First, the case 33 of the communication unit 3 is attached to the right end of the power supply case 41 of the power supply unit 4. Specifically, the mounting portion 330 of the case 33 is placed on the upper surface of the right end of the power supply case 41, and the screws inserted one by one into the two round holes 331 of the mounting portion 330 are screwed into the screw holes of the power supply case 41. In other words, the case 33 is attached to the power supply case 41 by screwing the mounting portion 330 to the power supply case 41. However, it is preferable that the communication unit 3 and the power supply unit 4 are electrically connected by the connector 34 mounted on the circuit board 32 before the communication unit 3 is attached to the power supply unit 4.

Then, the power supply case 41 is screwed to the bottom plate 210 at the center of the upper surface of the bottom plate 210 of the support member 21, thereby attaching the power supply unit 4 to the support member 21. At this time, the open surface (lower surface) of the power supply case 41 is closed by the bottom plate 210.

The power supply unit 4 and the communication unit 3 are attached to the support member 21 using the above procedure. However, the communication unit 3 may be attached to the power supply unit 4 after the power supply unit 4 is attached to the support member 21.

(2-3-8) Installation Procedure for Lighting Fixture Next, the installation procedure for mounting lighting fixture A1 on the ceiling (installation surface S1) will be described.

The worker performing the installation work inserts the first power cable C1 and the second power cable C2, which are pulled out from the ceiling (installation surface S1) into the room, into the two power holes 111 of the fixture body 1, one by one. Then, the worker inserts the two hanging bolts B1 protruding from the ceiling (installation surface S1) into the two mounting holes 112 of the fixture body 1, one by one, and attaches the fixture body 1 to the ceiling (installation surface S1) by tightening nuts N1 on each hanging bolt B1 (see Figure 2). Then, the worker connects the first power cable C1 to the primary terminal of the first terminal block 14A, and connects the second power cable C2 to the primary terminal of the second terminal block 14B.

Then, the worker temporarily hangs the light source unit 2 on the fixture body 1 with the two strings by hooking one end of each of the strings, which has been hooked into the hook holes 265 of the pair of locking parts 26, into the two hook holes 113 of the fixture body 1. In this state, the worker connects the receptacle connector 44 of the power supply unit 4 to the plug connector 150 of the fixture body 1.

Then, the worker brings the light source unit 2 in the temporarily hung state closer to the fixture body 1 while supporting it with both hands, and inserts the mounting spring 12 of the fixture body 1 between the pair of side plates 211 of the support member 21. Then, the tip portion of the mounting spring 12 inserted between the pair of side plates 211 is hooked on the hook portion 216 on the inner surface of each side plate 211 (see FIG. 3). As a result, the light source unit 2 is attached to the fixture body 1 by the two mounting springs 12. If the worker pulls the light source unit 2 downward, the tip portion of the mounting spring 12 will come off the hook portion 216, and the light source unit 2 can be removed from the fixture body 1.

This completes the installation of lighting fixture A1.

(2-4) Features of the Lighting Fixture According to the Embodiment In the lighting fixture A1, the opening 218 of the support member 21 can function as a slot antenna. That is, the opening 218 of the support member 21 (actually, the opening 218 and its periphery 2180) is electromagnetically coupled to the antenna 31 of the communication unit 3, and radiates radio waves emitted from the antenna 31 to the outside, and radiates radio waves arriving from the outside toward the antenna 31. In order to make the opening 218 function as a slot antenna, it is desirable that the longitudinal dimension (length dimension L1) of the opening 218 is at least one-quarter and not more than two-thirds of the wavelength of the radio waves used by the communication unit 3 as a communication medium, and among these, about one-half is the most desirable. For example, when the communication unit 3 uses radio waves in the 2.4 GHz band as a communication medium, the wavelength is about 120 mm, so that the length dimension L1 of the opening 218 is desirably at least 30 mm and not more than 60 mm (120 mm÷4=30 mm). Moreover, the dimension in the short direction of the opening 218 (width dimension D1) is preferably about several mm, for example, about 1 mm to 5 mm.

Here, the lighting device A1 has an opening 218 at a position that does not overlap the conductive region 200B of the substrate 200 when viewed from the direction facing the surface 200A of the substrate 200, specifically, at a position that overlaps with the non-conductive region 200C of the substrate 200 (see FIG. 4A). Therefore, the lighting device A1 can make the opening 218 function as a slot antenna, and can reduce the attenuation of radio waves caused by the conductive region 200B of the substrate 200. As a result, the lighting device A1 can improve wireless communication performance compared to the conventional example.

Furthermore, in lighting device A1, antenna 31 (circuit board 32) of communication unit 3 is disposed at a position overlapping conductor region 200B of substrate 200 when viewed from the direction facing surface 200A of substrate 200 (see FIG. 4B). In other words, lighting device A1 can reduce radio wave attenuation while reducing the distance between side plate 211 of support member 21 and substrate 200, compared to a case where antenna 31 is disposed outside substrate 200 when viewed from the direction facing surface 200A of substrate 200.

In lighting device A1, locking part 26 is arranged so as to overlap at least a portion of opening 218 when viewed from the direction facing top surface 210B of bottom plate 210 (see FIG. 4B). Since locking part 26 is made of a conductor (metal), when peripheral portion 2180 of opening 218 on top surface 210B of bottom plate 210 comes into contact (conducts) with locking part 26, length dimension L1 for opening 218 to function as a slot antenna appears to be shorter. As a result, opening 218 may no longer function as a slot antenna, or even if it does function, wireless communication performance may be degraded.

Therefore, the lighting device A1 arranges the locking part 26 so as not to come into contact with the peripheral part 2180 of the opening 218 on the upper surface 210B of the bottom plate 210 (see FIG. 4B and FIG. 12). In other words, the lighting device A1 shortens the side piece 261B of the locking part 26 to be shorter than the length of the main piece 260 in the short direction, thereby preventing the locking part 26 (side piece 261B) from coming into contact with the peripheral part 2180. The peripheral part 2180 of the opening 218 is a part that is located on both sides of the short direction of the opening 218 and may significantly impair the function of the opening 218 as a slot antenna if a short circuit occurs. For example, the peripheral part 2180 in this embodiment is an area within half the width dimension D1 of the opening 218 from the edge along the longitudinal direction of the opening 218 (see FIG. 4A). However, the peripheral portion 2180 is not limited to an area within half the width dimension D1 of the opening 218, but is determined according to conditions such as the frequency of the radio waves used by the communication unit 3, the material and thickness of the support member 21 (bottom plate 210), and the reception sensitivity required for the communication unit 3.

The lighting device A1 is thus able to prevent the apparent length of the opening 218 from becoming shorter by positioning the locking part 26 so as not to come into contact with the peripheral portion 2180 of the opening 218 on the upper surface 210B of the base plate 210, thereby further improving wireless communication performance.

In addition, in the lighting device A1, the antenna 31 is formed with a conductor formed on the surface 320 of the circuit board 32, and the circuit board 32 is arranged so that the surface 320 is inclined with respect to the upper surface 210B of the bottom plate 210 (see FIG. 3). Specifically, in the lighting device A1, the circuit board 32 is inclined so that the normal direction of the surface 320 of the circuit board 32 and the normal direction of the upper surface 210B of the bottom plate 210 are approximately perpendicular (see FIG. 3). However, the angle at which the circuit board 32 is inclined is not limited to a right angle.

In this way, the lighting device A1 can reduce the space occupied by the circuit board 32 (communication unit 3) in the short direction of the bottom plate 210 by tilting the circuit board 32 on which the antenna 31 is formed on the surface 320 with respect to the upper surface 210B of the bottom plate 210. In addition, when the antenna 31 is formed on the surface 320 of the circuit board 32, the strength of the radio waves transmitted from the antenna 31 and the sensitivity of the radio waves received by the antenna 31 are relatively high in the thickness direction of the circuit board 32. Therefore, the lighting device A1 can easily electromagnetically couple the antenna 31 and the opening 218 by arranging the antenna 31 (communication unit 3) at a position overlapping the conductor region 200B of the substrate 200 when viewed from the direction facing the surface 200A of the substrate 200. As a result, the lighting device A1 can further improve the wireless communication performance of the communication unit 3.

When viewed from the direction facing the surface 200A of the substrate 200 (the up-down direction), the opening 218 and the antenna 31 (circuit board 32) overlap in the short-side direction of the substrate 200 (see FIG. 4B). However, it is sufficient that the opening 218 and the antenna 31 overlap at least partially in the short-side direction of the substrate 200.

In this way, by overlapping at least a portion of the opening 218 with the antenna 31 (circuit board 32) in the short direction of the substrate 200, the function of the opening 218 as a slot antenna is improved, and wireless communication performance can be further improved.

(3) Modifications of the Lighting Fixture According to the Embodiment Next, a modification of the lighting fixture A1 according to the embodiment will be described. However, the basic configuration of the lighting fixture A1 of the modification described below is common to the basic configuration of the lighting fixture A1 according to the embodiment. Therefore, the same reference numerals are used to designate configurations that are common to the basic configuration of the lighting fixture A1 according to the embodiment and configurations that are substantially common, and illustrations and descriptions thereof will be omitted as appropriate. In the following description, "substantially common configuration" refers to configurations that are slightly different in shape, size, etc., but have the same function.

(3-1) Modification 1
The lighting device A1 of the first modification has a recess 202 (notch) in the non-conductor region 200C of the substrate 200 of the light source module 20 (see FIG. 13 ). Furthermore, the lighting device A1 of the first modification has an opening 218 of the bottom plate 210 overlapping the recess 202 when viewed from a direction facing the front surface 200A of the substrate 200 (the up-down direction).

The lighting device A1 of the first modification can further improve the wireless communication performance by eliminating the insulator (substrate 200) that blocks the opening 218. In addition, the lighting device A1 of the first modification may be configured so that at least a part of the opening 218 overlaps with the antenna 31 (circuit board 32) in the longitudinal direction of the substrate 200 when viewed from the direction facing the surface 200A of the substrate 200 (up and down direction) by narrowing the short-side width of the conductor region 200B in the recess 202. The lighting device A1 of the first modification can further improve the wireless communication performance by overlapping at least a part of the opening 218 with the antenna 31 (circuit board 32) in the longitudinal direction of the substrate 200.

(3-2) Modification 2
Illumination device A1 of modification 2 includes sheet member 27 that covers opening 218 on upper surface 210B of bottom plate 210 (see FIG. 14 ). Sheet member 27 is preferably formed in a sheet shape from an electrically insulating material, for example, a synthetic resin material such as polyethylene terephthalate resin.

The lighting device A1 of the second modification can improve wireless communication performance by blocking the opening 218 with the sheet member 27 made of an electrically insulating material, while preventing foreign objects (insects, dust, etc.) from entering the internal space of the cover 22 through the opening 218. The lighting device A1 of the second modification is particularly effective when combined with the lighting device A1 of the first modification.

(3-3) Modification 3
In lighting fixture A1 of modified example 3, communication unit 3 is disposed so that surface 320 of circuit board 32 on which antenna 31 is formed faces upper surface 210B of bottom plate 210 (see FIG. 15). Note that case 33 of communication unit 3 is not shown in FIG. 15. Also, in lighting fixture A1 of modified example 3, antenna 31 is disposed at a position overlapping conductor region 200B of substrate 200 when viewed from a direction facing surface 200A of substrate 200 (vertical direction) (see FIGS. 10 and 15).

The lighting fixture A1 of variant 3 can further improve wireless communication performance by positioning the communication unit 3 so that the surface 320 of the circuit board 32 on which the antenna 31 is formed faces the upper surface 210B of the bottom plate 210.

(3-4) Modification 4
The lighting fixture A1 of the fourth modification is characterized in that the overall length (length in the longitudinal direction) of the lighting fixture A1 of the embodiment is shortened to about three-quarters (see FIG. 16).

Specifically, the overall length of the fixture body 1, the support member 21, and the cover 22 have each been shortened to approximately three-quarters. In addition, the length of one of the two boards 200 of the light source module 20 (the right side in FIG. 16) is made half the length of the other board 200 (the left side in FIG. 16).

The lighting fixture A1 of variant 4 has a shorter overall length, which allows for greater freedom in where it can be installed.

(4) Summary The lighting device (A1) according to the first aspect of the present disclosure includes a light source (light source module 20), a wireless communication unit (communication unit 3), and a support member (21). The light source includes a substrate (200) and one or more light-emitting elements (LEDs 201) provided on a surface (200A) of the substrate (200). The wireless communication unit includes an antenna (31) and performs at least one of transmission and reception of radio waves via the antenna (31). The support member (21) has a first surface (lower surface 210A of the bottom plate 210) and a second surface (upper surface 210B of the bottom plate 210) opposite to the first surface, supports the light source on the first surface side, and has the wireless communication unit disposed on the second surface side. The substrate (200) has a conductor region (200B) on the surface (200A) in which a conductor for supplying power to the light-emitting element is formed. The wireless communication unit has an antenna (31) disposed at a position overlapping the conductor region (200B) when viewed from the direction facing the surface (200A). The support member (21) is made of a conductive material and has an opening (218) penetrating from the first surface to the second surface at a position not overlapping the conductor region (200B) when viewed from the direction facing the surface (200A).

The lighting device (A1) according to the first aspect can make the opening (218) function as a slot antenna, and can reduce radio wave attenuation caused by the conductor region (200B) of the substrate (200). As a result, the lighting device (A1) according to the first aspect can improve wireless communication performance compared to the conventional example.

The lighting device (A1) according to the second aspect of the present disclosure can be realized by combining it with the first aspect. In the lighting device (A1) according to the second aspect, it is preferable that the substrate (200) further has a non-conductor region (200C) on the surface (200A) where no conductor is formed. It is preferable that the support member (21) has an opening (218) at a position overlapping with the non-conductor region (200C) when viewed from the direction facing the surface (200A).

The lighting fixture (A1) according to the second aspect can reduce radio wave attenuation while shortening the distance between the support member (21) and the substrate (200) compared to a case where the antenna (31) is disposed outside the substrate (200) when viewed from the direction facing the surface (200A) of the substrate (200).

The lighting device (A1) according to the third aspect of the present disclosure can be realized by combining it with the first or second aspect. It is preferable that the lighting device (A1) according to the third aspect further includes a sheet member (27) formed in a sheet shape from an electrically insulating material and closing the opening (218).

The lighting device (A1) according to the third aspect can improve wireless communication performance while preventing foreign objects (insects, dust, etc.) from entering through the opening (218).

The lighting device (A1) according to the fourth aspect of the present disclosure can be realized by combining it with any one of the first to third aspects. In the lighting device (A1) according to the fourth aspect, it is preferable that the wireless communication unit further includes a wireless circuit (30) that uses an antenna (31) to perform at least one of transmitting and receiving wireless signals, and a circuit board (32) on which the antenna (31) and the wireless circuit (30) are formed.

The lighting fixture (A1) according to the fourth aspect can reduce the size of the wireless communication unit by forming the antenna (31) and the wireless circuit (30) on the same circuit board (32).

The lighting device (A1) according to the fifth aspect of the present disclosure can be realized by combining it with the fourth aspect. In the lighting device (A1) according to the fifth aspect, the wireless communication unit preferably forms an antenna (31) with a conductor formed on the surface (320) of the circuit board (32). The circuit board (32) is preferably arranged so that the surface (320) of the circuit board (32) is inclined with respect to the second surface.

The lighting device (A1) according to the fifth aspect can easily electromagnetically couple the antenna (31) and the opening (218). As a result, the lighting device (A1) according to the fifth aspect can further improve wireless communication performance.

A lighting device (A1) according to a sixth aspect of the present disclosure can be realized by combining it with the fourth aspect. In the lighting device (A1) according to the sixth aspect, it is preferable that the wireless communication unit forms an antenna (31) with a conductor formed on the surface (320) of the circuit board (32). It is preferable that the circuit board (32) is arranged so that the surface (320) of the circuit board (32) faces the second surface.

The lighting device (A1) according to the sixth aspect can further improve wireless communication performance.

The lighting device (A1) according to the seventh aspect of the present disclosure can be realized by combining it with any of the first to sixth aspects. In the lighting device (A1) according to the seventh aspect, the substrate (200) is preferably formed in a rectangular shape. The first and second surfaces of the support member (21) are preferably formed in an elongated shape wider than the substrate (200). The opening (218) is preferably formed in an elongated hole shape along the longitudinal direction of the support member (21).

In the lighting device (A1) according to the seventh aspect, the opening (218) is formed in the shape of an elongated hole along the longitudinal direction of the support member (21), so that the length of the opening (218) can be easily adjusted.

The lighting device (A1) according to the eighth aspect of the present disclosure can be realized by combining it with the seventh aspect. In the lighting device (A1) according to the eighth aspect, it is preferable that the support member (21) overlaps at least a portion of the opening (218) with the antenna (31) in the short direction of the substrate (200) when viewed from the direction facing the surface (200A).

The lighting device (A1) according to the eighth aspect improves the function of the opening (218) as a slot antenna, and can further improve wireless communication performance.

A1 Lighting equipment 3 Communication unit (wireless communication unit)
20 Light source module (light source)
21 Support member 27 Sheet member 30 Wireless circuit 31 Antenna 32 Circuit board 200 Board 200A Surface of board 200B Conductive region 200C Non-conductive region 201 LED (light emitting element)
210A Bottom plate lower surface (first surface)
210B Upper surface of bottom plate (second surface)
218 Opening 320 Surface of circuit board

Claims (8)

a light source having a substrate and one or more light emitting elements provided on a surface of the substrate;
a wireless communication unit having an antenna and performing at least one of transmission and reception of radio waves via the antenna;
a support member having a first surface and a second surface opposite to the first surface, supporting the light source on the first surface side and disposing the wireless communication unit on the second surface side;
Equipped with
the substrate has a conductor region on its surface, the conductor being for supplying power to the light-emitting element;
the wireless communication unit has an antenna disposed at a position overlapping with the conductive region when viewed from a direction facing the front surface;
the support member is made of a conductive material, and has an opening penetrating from the first surface to the second surface at a position not overlapping the conductor region when viewed from a direction facing the front surface;
Lighting fixtures. the substrate further has a non-conductor region on the surface where the conductor is not formed;
the support member has the opening at a position overlapping the non-conductor region when viewed from a direction facing the surface;
2. The lighting device of claim 1. The sheet member is formed in a sheet shape from an electrically insulating material and closes the opening.
3. A lighting fixture according to claim 1 or 2. the wireless communication unit further includes a wireless circuit that uses the antenna to at least one of transmit and receive wireless signals, and a circuit board on which the antenna and the wireless circuit are formed.
3. A lighting fixture according to claim 1 or 2. the wireless communication unit forms the antenna with a conductor formed on a surface of the circuit board;
The circuit board is disposed so that the front surface of the circuit board is inclined with respect to the second surface.
5. A lighting device according to claim 4. the wireless communication unit forms the antenna with a conductor formed on a surface of the circuit board;
The circuit board is disposed so that the front surface of the circuit board faces the second surface.
5. A lighting device according to claim 4. The substrate is formed in a rectangular shape,
The first surface and the second surface of the support member are formed in an elongated shape having a width greater than that of the substrate,
The opening is formed in an elongated hole shape along the longitudinal direction of the support member.
3. A lighting fixture according to claim 1 or 2. When viewed from a direction facing the front surface, the support member overlaps at least a portion of the opening with the antenna in a short-side direction of the substrate.
8. A lighting device according to claim 7.

Images