JP2024041672A - Lighting equipment and light source units - Google Patents

Abstract

An object of the present disclosure is to improve light receiving sensitivity.
[Solution] The lighting device A1 includes a support member 3, a light source module 1, a light receiving unit 40, and a cover 5. The support member 3 has a first surface 30A and a second surface 30B opposite to the first surface 30A. The light source module 1 is supported by the support member 3 on the side of the first surface 30A. The light receiving unit 40 is disposed on the side of the second surface 30B of the support member 3. The cover 5 covers the light source module 1 from a direction facing the first surface 30A of the support member 3. The cover 5 also has an extension portion 53 that protrudes from the periphery of the cover 5 along the first surface 30A in a direction approaching the light source module 1. The support member 3 has a through hole 32 that penetrates from the first surface 30A to the second surface 30B in an area S1 sandwiched between the extension portions 53. The light receiving unit 40 faces the through hole 32.
[Selected Figure] Figure 1

Description

The present disclosure relates to a lighting fixture and a light source unit, and more particularly to a lighting fixture that can be controlled remotely and a light source unit included in the lighting fixture.

As a conventional example, a light source unit and a lighting fixture described in Patent Document 1 will be exemplified. The lighting fixture described in Patent Document 1 includes a light source unit and a fixture body that detachably holds the light source unit. The light source unit includes a light source module, a lighting device that controls power supplied to the light source module, a light receiving element unit that receives a remote control signal (infrared signal) and controls the lighting device, and a support plate that supports the light source module. A cover attached to the support plate so as to cover the light source module.

The light receiving element unit includes a light receiving element having a light receiving section for receiving infrared rays, a circuit board on which the light receiving element is mounted, and a case housing the circuit board. The case has a first opening that exposes the light receiving portion of the light receiving element from the case.

The support plate is made of a metal plate, the light source module is provided on the first surface side, and the light receiving element unit is provided on the second surface side opposite to the first surface. A second opening is formed in a portion of the support plate where the light source module is not provided. The second opening has a circular or elliptical shape that at least partially overlaps the first opening when viewed from a direction perpendicular to the first surface. That is, the light receiving element receives the infrared signal through the first aperture and the second aperture.

The cover has a support portion extending along the first surface of the support plate. The cover is fixed to the support plate so as to cover the light source module. The second opening of the support plate is closed by the support portion of the cover. This prevents foreign matter from entering the space on the second surface side of the support plate from the second opening.

JP 2021-82520 A

However, in the conventional example described in Patent Document 1, the infrared signal received by the light receiving section must pass through two members: the cover and the support section. Therefore, it has been difficult to improve the light receiving sensitivity of the infrared signal in the light receiving element.

An object of the present disclosure is to provide a lighting fixture and a light source unit that can improve light-receiving sensitivity.

A lighting fixture according to one aspect of the present disclosure includes a support member, a light source, a light receiving section, and a cover. The support member has a first surface and a second surface opposite to the first surface. The light source is supported by the support member on the first surface side. The light receiving section is arranged on the second surface side of the support member. The cover covers the light source from a direction facing the first surface. The cover has an extension portion that protrudes from the periphery of the cover along the first surface in a direction approaching the light source. The support member has a through hole penetrating from the first surface to the second surface in a region sandwiched by the extension portion. The light receiving section faces the through hole.

A light source unit according to one aspect of the present disclosure is used in a lighting fixture. The light source unit includes the support member, the light source, the light receiving section, and the cover. The light source unit is removably attached to a device body that is attached to construction materials.

The lighting fixture and light source unit of the present disclosure have the effect of improving light receiving sensitivity.

FIG. 1 is a schematic diagram of a lighting fixture according to an embodiment of the present disclosure. FIG. 2 is a perspective view of the above lighting fixture. FIG. 3 is an exploded perspective view of the above lighting fixture. FIG. 4 is a circuit block diagram of a light source unit in the above lighting fixture. FIG. 5 is a partially cutaway perspective view of the infrared module in the above lighting fixture. FIG. 6 is a sectional view of a main part of the light source unit same as above. FIG. 7 is a partially omitted side view of the light source module, support member, and cover in the above lighting fixture. FIG. 8 is a partially cutaway perspective view of the infrared module in the above lighting fixture. FIG. 9 is an explanatory diagram for explaining the installation state of the lighting equipment same as above. FIG. 10A is a partially omitted side view of a light source module, a support member, and a cover in Modification Example 1 of the above lighting fixture. FIG. 10B is a partially omitted side view of another configuration of a light source module, a support member, and a cover in Modification 1 of the above lighting fixture. FIG. 10C is a partially omitted side view of still another configuration of the light source module, support member, and cover in Modification 1 of the above lighting fixture. FIG. 10D is a partially omitted side view of still another configuration of the light source module, support member, and cover in Modification 1 of the above lighting fixture. FIG. 11 is a side view of another configuration of the light source module, the support member, and the cover in Modification 1 of the above lighting fixture. FIG. 12 is a side view of a light source module, a support member, and a cover in Modification 2 of the above lighting fixture. FIG. 13 is a partially omitted sectional view of a light source module, a support member, and a cover in Modification 3 of the above lighting fixture. FIG. 14 is a partially omitted sectional view of another configuration of a light source module, a support member, and a cover in Modification 3 of the above lighting fixture. FIG. 15 is a partially omitted cross-sectional view of still another configuration of the light source module, support member, and cover in Modification 3 of the above lighting fixture. FIG. 16A is a sectional view of a main part of a support member in Modification 4 of the above lighting fixture. FIG. 16B is a cross-sectional view of a main part of another configuration of the support member in Modification 4 of the above lighting fixture. FIG. 16C is a cross-sectional view of a main part of still another configuration of the support member in Modification 4 of the lighting fixture. FIG. 17A is a sectional view of a main part of a support member in Modification 4 of the above lighting fixture. FIG. 17B is a cross-sectional view of a main part of another configuration of the support member in Modification 4 of the above lighting fixture. FIG. 17C is a cross-sectional view of a main part of still another configuration of the support member in Modification 4 of the above lighting fixture. FIG. 17D is a sectional view of a main part of yet another configuration of the support member in Modification 4 of the lighting fixture. FIG. 18A is a sectional view of a main part of a support member in Modification 4 of the above lighting fixture. FIG. 18B is a sectional view of a main part of another configuration of the support member in Modification 4 of the above lighting fixture. FIG. 18C is a cross-sectional view of a main part of still another configuration of the support member in Modification 4 of the above lighting fixture. FIG. 19A is a sectional view of a main part of a support member in Modification 4 of the above lighting fixture. FIG. 19B is a sectional view of a main part of another configuration of the support member in Modification 4 of the above lighting fixture. FIG. 20A is a sectional view of a main part of a support member in Modification 4 of the above lighting fixture. FIG. 20B is a cross-sectional view of a main part of another configuration of the support member in Modification 4 of the above lighting fixture. FIG. 20C is a sectional view of a main part of still another configuration of the support member in Modification 4 of the lighting fixture. FIG. 21A is a sectional view of a main part of a support member in Modification 4 of the above lighting fixture. FIG. 21B is a sectional view of a main part of another configuration of the support member in Modification 4 of the above lighting fixture. FIG. 21C is a cross-sectional view of a main part of still another configuration of the support member in Modification 4 of the above lighting fixture. FIG. 21D is a cross-sectional view of a main part of still another structure of the support member in Modification 4 of the above lighting fixture. FIG. 22A is a sectional view of main parts of a light source module and a support member in Modification 4 of the above lighting fixture. FIG. 22B is a cross-sectional view of main parts of another configuration of the light source module and the support member in Modification 4 of the above lighting fixture. FIG. 23 is a front view of a fifth modification of the lighting fixture. FIG. 24 is a cross-sectional view of main parts of a light source module, a support member, and a cover in Modification 5 of the above lighting fixture. FIG. 25 is a sectional view of a main part of a light source unit in Modification 6 of the above lighting fixture. FIG. 26 is a cross-sectional view of a main part of another configuration of the light source unit in Modification 6 of the above lighting fixture. FIG. 27A is a sectional view of a main part of still another configuration of the light source unit in Modification 6 of the above lighting fixture. FIG. 27B is a cross-sectional view of a main part of yet another configuration of the light source unit in Modification 6 of the above lighting fixture. FIG. 28 is a cross-sectional view of a main part of another configuration of the light source unit in Modification 6 of the above lighting fixture. Fig. 29A is a cross-sectional view of a main part of the substrate and the support member in the lighting fixture of the above modification 6. Fig. 29B is a cross-sectional view of a main part of another configuration of the substrate and the support member in the lighting fixture of the above modification 6. Fig. 29C is a cross-sectional view of a main part of yet another configuration of the substrate and the support member in the lighting fixture of the above modification 6. Fig. 29D is a cross-sectional view of a main part of yet another configuration of the substrate and the support member in the lighting fixture of the above modification 6. FIG. 30A is a cross-sectional view of the main parts of the substrate and support member in Modification 6 of the above lighting fixture. FIG. 30B is a cross-sectional view of a main part of another configuration of the substrate and support member in Modification 6 of the above lighting fixture. FIG. 30C is a cross-sectional view of the support member and main parts of the case in Modification 6 of the above lighting fixture. FIG. 30D is a sectional view of main parts of another configuration of the support member and case in Modification 6 of the above lighting fixture. FIG. 31A is a cross-sectional perspective view of a supporting member and main parts of a seventh modification of the above lighting fixture. FIG. 31B is a cross-sectional perspective view of a main part of another configuration of the support member and components in Modified Example 7 of the above lighting fixture. FIG. 31C is a cross-sectional view of a main part of still another configuration of the support member and components in Modification 7 of the above lighting fixture. FIG. 31D is a cross-sectional view of a main part of yet another configuration of the support member and components in Modification 7 of the above lighting fixture. FIG. 32 is a cross-sectional view of a main part of a substrate in Modification 8 of the above lighting fixture. FIG. 33A is a plan view of the support member and main parts of the light receiving section in Modification 9 of the above lighting fixture. FIG. 33B is a plan view of main parts of another configuration of the support member and the light receiving section in Modification 9 of the above lighting fixture. FIG. 33C is a plan view of main parts of still another configuration of the support member and the light receiving section in Modification Example 9 of the above lighting fixture. FIG. 33D is a plan view of main parts of yet another configuration of the support member and light receiving section in Modification 9 of the above lighting fixture. FIG. 34A is a plan view of main parts of the support member and the light receiving section in Modification 9 of the above lighting fixture. FIG. 34B is a plan view of another configuration of the supporting member and the main parts of the light receiving section in Modification 9 of the above lighting fixture. Fig. 35A is a plan view of the main parts of the substrate, the support member, and the light receiving unit in the lighting device of the above modification 10. Fig. 35B is a plan view of the main parts of the substrate, the support member, and the light receiving unit in another configuration in the lighting device of the above modification 10. FIG. 36A is a cross-sectional view of main parts of a light source module, a support member, and an infrared module in Modification 11 of the above lighting fixture. FIG. 36B is a longitudinal sectional view of main parts of a light source module, a support member, and an infrared module of Modification 11 of the above lighting fixture. FIG. 37 is a longitudinal cross-sectional view of main parts of a support member, a power supply unit, and an insulating member in Modification Example 11 of the above lighting fixture. FIG. 38A is a cross-sectional view of main parts of a support member, a power supply unit, and an insulating member in Modification 12 of the above lighting fixture. FIG. 38B is a cross-sectional view of main parts of another configuration of a support member, a power supply unit, and an insulating member in Modification Example 12 of the above lighting fixture. FIG. 38C is a cross-sectional view of main parts of still another configuration of the support member, power supply unit, and insulating member in Modification Example 12 of the above lighting fixture. FIG. 38D is a cross-sectional view of still another main part of the support member, power supply unit, and insulating member in Modification 12 of the above lighting fixture. FIG. 39A is a cross-sectional view of main parts of a light source module, a support member, and an infrared module in Modification 13 of the above lighting fixture. FIG. 39B is a longitudinal cross-sectional view of main parts of a light source module, a support member, a power supply unit, and an infrared module in Modification Example 13 of the above lighting fixture. FIG. 40A is a cross-sectional view of main parts of a light source module, a support member, and an infrared module in Modification 13 of the above lighting fixture. FIG. 40B is a cross-sectional view of main parts of another configuration of the light source module, the support member, and the infrared module in Modification Example 13 of the above lighting fixture. FIG. 41A is a cross-sectional view of main parts of a light source module, a support member, and an infrared module in Modification Example 13 of the above lighting fixture. FIG. 41B is a cross-sectional view of main parts of another configuration of the light source module, the support member, and the infrared module in Modification Example 13 of the above lighting fixture. FIG. 42 is a cross-sectional view of main parts of a light source module, a support member, and an infrared module in Modified Example 13 of the above lighting fixture. FIG. 43 is a cross-sectional view of the main parts of the lighting fixture of the reference example. FIG. 44 is a cross-sectional view of a main part of another configuration of the lighting fixture of the above reference example. FIG. 45 is a sectional view of a main part of still another configuration of the lighting fixture of the reference example above. FIG. 46 is a cross-sectional view of a main part of yet another configuration of the lighting fixture of the reference example described above.

Hereinafter, lighting fixtures and light source units according to embodiments of the present disclosure will be described in detail with reference to the drawings. However, each figure described in the following embodiments is a schematic diagram, and the respective ratios of the sizes and thicknesses of each component do not necessarily reflect the actual size ratios. Note that the configuration described in the embodiments below is only an example of the present disclosure. The present disclosure is not limited to the following embodiments, and various changes can be made depending on the design etc. as long as the effects of the present disclosure can be achieved.

(1) Overview The lighting fixture A1 according to the embodiment includes a support member 3, a light source (light source module 1), a light receiving section 40, and a cover 5, as shown in FIG.

The support member 3 has a first surface 30A and a second surface 30B opposite to the first surface 30A. The light source module 1 is supported by the support member 3 on the first surface 30A side. The light receiving section 40 is arranged on the second surface 30B side of the support member 3. The light source module 1 includes, for example, a substrate 11 and one or more light emitting elements (LEDs 10) mounted on the substrate 11.

The cover 5 covers the light source module 1 from the direction opposite the first surface 30A of the support member 3. The cover 5 also has an extension 53 that protrudes from the periphery of the cover 5 (both the left and right ends in FIG. 1) along the first surface 30A toward the light source module 1.

The support member 3 has a through hole 32 in a region S1 sandwiched between the extension portions 53 that penetrates from the first surface 30A to the second surface 30B. The light receiving section 40 faces the through hole 32.

The lighting fixture A1 according to the embodiment can cause the light receiving section 40 to receive an optical signal through the through hole 32 that the support member 3 has. Therefore, the lighting fixture A1 according to the embodiment can improve the light receiving sensitivity in the light receiving section 40 by suppressing attenuation of the optical signal until it passes through the through hole 32 of the support member 3.

(2) Details A lighting fixture A1 (hereinafter abbreviated as lighting fixture A1) according to an embodiment of the present disclosure is a light source unit B1 (hereinafter abbreviated as a light source) according to an embodiment of the present disclosure, as shown in FIGS. (abbreviated as unit B1), and an instrument main body 6. The light source unit B1 is removably attached to a fixture body 6 that is directly attached to the ceiling (construction material). However, the appliance main body 6 may be embedded in the ceiling, directly attached to the wall, or embedded in the wall.

The instrument main body 6 includes a rectangular box-shaped accommodating part 60 with an open bottom surface, a pair of reflection plates 61 that protrude diagonally upward from the opening edges on both sides along the longitudinal direction of the accommodating part 60, and the accommodating part 60 and A pair of end plates 62 are provided at both longitudinal ends of a pair of reflection plates 61 (see FIG. 3). In the instrument main body 6, suspension bolts (not shown) are inserted into at least any two of the plurality of attachment holes 63 provided on the bottom surface of the accommodating portion 60, and nuts (not shown) are inserted into the suspension bolts. (not shown) is tightened to install it on the ceiling. Moreover, a power supply wire is inserted into any one of the plurality of power supply holes 64 provided on the bottom surface of the housing portion 60 . The power wire inserted through the power supply hole 64 is electrically connected to a terminal block 65 attached to the inner bottom surface of the accommodating portion 60 . Three electric wires 66 are drawn out from the terminal block 65. The tips of these three electric wires 66 are electrically connected to one male power connector 67.

(2-1) Light Source Unit The light source unit B1 includes a light source module 1, a power supply unit 2, a support member 3, an infrared module 4, and a cover 5, as shown in FIG.

(2-1-1) Light Source Module The light source module 1 has two substrates 11 and a number of LEDs (Light Emitting Diodes) 10 mounted on the surface (underside) of each substrate 11. The LEDs 10, which are light-emitting elements, are, for example, packaged white LEDs for lighting. However, the light-emitting elements are not limited to LEDs and may be organic electroluminescence elements, semiconductor laser elements, or the like.

Each substrate 11 is formed into a long rectangular shape. However, the substrate 11 may be configured by connecting a plurality of substrates in the longitudinal direction. A large number of LEDs 10 are mounted in the center of the front surface (lower surface) of each board 11 in the lateral direction and arranged in a row at regular intervals along the longitudinal direction of each board 11 (see FIG. 3). A large number of LEDs 10 are electrically connected in series or in series and parallel by printed wiring formed on the surface of each board 11. Furthermore, two sets of connectors 12 are mounted on one end of the surface of each board 11 in the longitudinal direction. The printed wiring formed on the surface of each board 11 is electrically connected via two sets of connectors 12.

(2-1-2) Supporting Member The supporting member 3 is formed of a metal plate into a long square horn shape. The support member 3 has a long rectangular bottom plate 30 and a pair of side plates 31 that rise upward from both ends of the bottom plate 30 along the longitudinal direction. The light source module 1 is attached to the first surface 30A (lower surface) of the bottom plate 30 by a plurality of claws 301 cut and raised from the bottom plate 30. Note that the width of the bottom plate 30 in the lateral direction is larger than the width of the substrate 11 in the lateral direction (see FIG. 3). However, the light source module 1 is constructed by sliding the substrate 11 along the longitudinal direction of the bottom plate 30 and hooking it on the plurality of claws 301, and then regulating the movement of the substrate 11 with a retaining piece provided on the bottom plate 30. It may be attached to the bottom plate 30. Alternatively, an attachment method in which a protrusion other than the claw 301 is hooked onto the end of the substrate 11, an attachment method in which the substrate 11 is bonded to the bottom plate 30 with an adhesive, etc. may be employed.

Further, the bottom plate 30 has protrusions 34 at both ends in the lateral direction (see FIG. 6). Each protrusion 34 is formed in a U-shape when viewed from the longitudinal direction of the bottom plate 30, and projects downward from the first surface 30A of the bottom plate 30. Note that the pair of side plates 31 protrude upward from the outer end of the protrusion 34 .

Further, the bottom plate 30 is provided with a through hole 32 that penetrates from the first surface 30A to the second surface 30B (upper surface) of the bottom plate 30 (see FIG. 6). The through hole 32 is provided outside the light source module 1 and inside the protrusion 34 in the lateral direction of the bottom plate 30 . In other words, the through hole 32 is provided at a position that does not overlap the light source module 1 when viewed from the thickness direction (vertical direction) of the bottom plate 30 (see FIG. 6). Note that the shape of the through hole 32 when viewed from the thickness direction of the bottom plate 30 is circular, but it may have a shape other than circular, such as an oval or a square.

(2-1-3) Power Supply Unit As shown in FIG. 3, the power supply unit 2 includes a power supply device 20 and a power supply case 21 that houses the power supply device 20. The power supply device 20 is composed of a rectangular printed circuit board 22 on which various electronic components including integrated circuits and a female power connector 23 are mounted. Power connector 23 is electrically and mechanically connected to power connector 67.

The power supply case 21 is formed of a metal plate into a long rectangular box shape with one side (bottom side) open. The power supply case 21 accommodates the power supply device 20 and is fixed to the support member 3 with its opening surface facing the second surface 30B (upper surface) of the bottom plate 30.

As shown in FIG. 4, the power supply device 20 is supplied with AC power from the commercial power system 9 through a power connector 23. The power supply device 20 includes a power conversion circuit 200, a constant current circuit 201, a control circuit 202, a control power supply circuit 203, a pair of output terminals 204 and 205, a signal terminal 206, a control power supply terminal 207, and a ground terminal. 208. One output terminal 204 is electrically connected to the positive electrode of the light source module 1 , and the other output terminal 205 is electrically connected to the negative electrode of the light source module 1 .

The power conversion circuit 200 is configured to convert AC power supplied from the power system 9 into DC power. The power conversion circuit 200 has, for example, a full-wave rectifier circuit, a power factor correction circuit (step-up chopper circuit), a buck converter (step-down chopper circuit), etc. Alternatively, the power conversion circuit 200 may be configured with a full-wave rectifier circuit and a converter circuit. The converter circuit has a single-stage converter (also called a one-converter) that can perform voltage conversion and power factor correction in parallel. Specifically, the converter circuit has a SEPIC (Single Ended Primary Inductance Converter) type DC/DC converter circuit.

The constant current circuit 201 is configured to match the DC current supplied from the power conversion circuit 200 to the light source module 1 via the pair of output terminals 204 and 205 to a target value.

The control circuit 202 includes a microcontroller as a main component. The control circuit 202 switches the power conversion circuit 200 and the constant current circuit 201 between operation and stop according to the control information received from the infrared module 4, and changes the target value of the DC current (load current) in the constant current circuit 201. is configured to do so.

The control circuit 202 receives a PWM (Pulse Width Modulation) signal from the infrared module 4 through a signal terminal 206 and a ground terminal 208. The PWM signal transmits control information by changing the duty ratio of a rectangular wave signal with a constant period. For example, control information that sets the target value of the load current to zero when the duty ratio is between 95% and 100% is transmitted. Furthermore, control information that sets the target value of the load current to the rated current value of the light source module 1 is transmitted when the duty ratio is 5% or less. Furthermore, when the duty ratio is an arbitrary value in the range of 95% to 5%, control information is provided that sets the target value of the load current to a corresponding value in the range of 5% to 100% of the rated current value of the light source module 1. transmitted.

The control power supply circuit 203 is configured to generate a control power supply voltage from the DC output of the power conversion circuit 200. The control power supply circuit 203 is configured to generate a control power supply voltage (for example, a DC voltage of about 5 V to 3.3 V) from the output voltage of the power conversion circuit 200. The control power supply circuit 203 applies the created control power supply voltage to the control power supply terminal 207 and the ground terminal 208, and supplies it to the infrared module 4 via the two electric wires 46.

(2-1-4) Infrared module (2-1-4-1) Circuit configuration of infrared module The infrared module 4 has a light receiving section 40 and a signal circuit section 41, and a remote controller 7 (see FIG. 4). The control information is obtained by receiving (receiving) an optical signal (infrared signal) transmitted from the Note that the infrared signal transmitted from the remote controller 7 complies with, for example, a standard defined by the Home Appliance Association, a general incorporated foundation, the so-called Home Appliance Association format. In the Kadenkyo format, a carrier wave consisting of an infrared ray with a peak wavelength of 900 to 950 nm, a duty ratio of 50%, and a square wave with a frequency of 33 kHz or more and 40 kHz or less is pulse position modulated. However, the optical signal may be an infrared signal that conforms to a protocol other than the Consumer Electronics Association format. Alternatively, the optical signal may use light other than infrared rays (for example, visible light) as a medium.

The light receiving section 40 includes a light receiving element (for example, a photodiode or a phototransistor) for receiving infrared rays (infrared light). The light receiving section 40 shapes the waveform of the output signal of the light receiving element, amplifies the signal, and outputs the signal. That is, the light receiving section 40 converts an optical signal (infrared signal) into an electrical signal and outputs the electrical signal. Note that in the following description, the electrical signal output from the light receiving section 40 will be referred to as a received signal.

The signal circuit section 41 demodulates the received signal output from the light receiving section 40 and acquires control information. The control information is information including a lighting command to turn on the light source unit B1, a turn-off command to turn off the light source unit B1, and a dimming command to instruct the dimming ratio of the light source unit B1.

Furthermore, the signal circuit unit 41 converts the acquired control information (lighting command, lights-off command, and dimming command) into a PWM signal. For example, when the signal circuit unit 41 obtains a turn-on command, it converts it into a PWM signal with a duty ratio of 3%, and when it obtains a turn-off command, it converts it into a PWM signal with a duty ratio of 100%. Moreover, when the signal circuit unit 41 acquires a dimming command, it converts it into a PWM signal with a duty ratio corresponding to the dimming ratio instructed by the dimming command. The signal circuit unit 41 outputs the converted PWM signal to the signal terminal 206 and ground terminal 208 of the power supply device 20. Note that the light receiving section 40 and the signal circuit section 41 operate with the control power supply voltage supplied from the control power supply circuit 203 of the power supply device 20.

(2-1-4-2) Structure of infrared module The infrared module 4 has a circuit board 42 and a case 43, as shown in FIG. The circuit board 42 is formed into a rectangular shape. A light receiving section 40, a signal circuit section 41, a signal connector, etc. are mounted on the front surface (lower surface) of the circuit board 42. However, in FIG. 5, illustration of the signal connector is omitted.

In the light receiving unit 40, a light receiving lens 401 is provided on one side of a rectangular parallelepiped package 400 (see FIGS. 5 and 6). The light receiving lens 401 is configured to focus an infrared signal (infrared light) onto a light receiving element such as a photodiode or a phototransistor housed in the package 400.

(2-1-4-3) Case The up/down, left/right, front/rear directions indicated by arrows in FIG. 5 are defined as the up/down, left/right, front/rear directions of infrared module 4, respectively.

As shown in FIGS. 5 and 6, the case 43 has a lower wall 430, a front wall 431, a rear wall 432, a side wall 433, and an upper wall 434, and is formed into a box shape with an open left side. Further, the case 43 has support portions 435 on the front wall 431 and the rear wall 432 that support both ends of the circuit board 42 in the longitudinal direction. The case 43 is configured as a synthetic resin molded body made of a synthetic resin material such as polycarbonate resin. However, the case 43 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.

A circular opening 44 is formed at the right rear end of the lower wall 430. The opening 44 vertically passes through the lower wall 430 and faces the light receiving lens 401 of the light receiving section 40 mounted on the circuit board 42 along the vertical direction (see FIGS. 5 and 6). That is, the light receiving lens 401 of the light receiving unit 40 faces the outside of the case 43 through the opening 44 of the lower wall 430. Therefore, the light receiving unit 40 can receive an infrared signal coming from outside the case 43 through the opening 44 with the light receiving lens 401 .

Here, the opening 44 of the case 43 faces the through hole 32 provided in the bottom plate 30 of the support member 3 along the vertical direction (see FIGS. 5 and 6). Therefore, by designing the respective sizes of the opening 44 and the through hole 32 to be optimal, the receiving distance necessary for the infrared module 4 can be secured, while the optical signal can be transmitted toward other light source units. (infrared signals).

The front wall 431 and the rear wall 432 of the case 43 each have one coupling male part 436. Each coupling male portion 436 is formed in an E-shape. Each male coupling part 436 is mechanically coupled to a pair of female coupling parts provided in the power supply case 21 (see FIG. 3). The pair of coupling female parts are provided on one side surface of the power supply case 21 in the longitudinal direction.

The case 43 is attached to one end of the power supply case 21 in the longitudinal direction by connecting a pair of male connecting parts 436 to a pair of female connecting parts (see FIG. 3). Therefore, the lighting device A1 does not require a structure for attaching the case 43 to the support member 3, so the number of parts and the assembly process can be reduced. However, the case 43 may be attached to the support member 3 (for example, the side plate 31 of the support member 3). By attaching the case 43 to the support member 3, the lighting device A1 can increase the freedom of the installation location of the infrared module 4. The three electric wires 46 of the infrared module 4 are electrically connected to the signal terminal 206, the control power terminal 207, and the ground terminal 208 of the power supply device 20 by connecting the plug connector to the receptacle connector mounted on the printed circuit board 22 of the power supply device 20 (see FIG. 4).

(2-1-5) Cover The cover 5 has a cover body 50, a pair of protruding walls 51, and a pair of extending portions 53 (see Figs. 3 and 6). The cover body 50 is formed in a long semi-cylindrical shape. However, the shape of the cover body 50 is not limited to a long semi-cylindrical shape, and may be any shape such as a square tube shape. The pair of extending portions 53 protrude inward from both ends of the short side of the cover body 50 along the longitudinal direction of the cover body 50. The pair of protruding walls 51 protrude upward along the longitudinal direction of the cover body 50 from a connecting piece 531 (described later) of the pair of extending portions 53 (see Fig. 6). Note that a hook-shaped hook portion 52 is integrally provided on the upper end of the pair of protruding walls 51 along the longitudinal direction of each protruding wall 51. The cover body 50, the pair of protruding walls 51, and the pair of hook portions 52 are integrally formed from a synthetic resin having translucency such as an acrylic resin or a polycarbonate resin. However, the cover body 50, the pair of protruding walls 51, and the pair of extending portions 53 may be formed of a material having translucency other than synthetic resin, for example, inorganic glass such as quartz glass. The cover 5 accommodates the support member 3 between the pair of protruding walls 51, and is attached to the support member 3 by hooking the hook portions 52 provided at the upper ends of the pair of protruding walls 51 onto the tips (upper ends) of the pair of side plates 31 of the support member 3 (see FIG. 6).

The pair of extensions 53 are configured to cover at least a portion of the first surface 30A of the bottom plate 30 of the support member 3 that is exposed to the outside of the light source module 1 (see FIG. 6). . Note that the through hole 32 of the support member 3 is provided in a region S2 sandwiched between the light source module 1 and the extension portion 53 on one side (see FIG. 6).

Each extension 53 has a main piece 530, a connecting piece 531, and a side piece 532 (see FIG. 6). The connecting piece 531 is formed in a rectangular flat plate shape and protrudes inward from both ends of the short side of the cover body 50 along the longitudinal direction of the cover body 50. The main piece 530 is formed in a V-shape when viewed in the longitudinal direction and protrudes inward from the tip of the connecting piece 531 along the longitudinal direction of the cover body 50. The side piece 532 is formed in a rectangular flat plate shape and protrudes upward from the tip of the main piece 530 along the longitudinal direction of the cover body 50. The upper end of the side piece 532 contacts the first surface 30A of the bottom plate 30 of the support member 3 when the cover 5 is attached to the support member 3 (see FIG. 6). In addition, a portion of the main piece 530 (the portion extending outward from the bottom end of the main piece 530) faces the protrusion 34 of the support member 3 with a small gap when the cover 5 is attached to the support member 3 (see FIG. 6). As a result, when an external force is applied to the cover 5, the protrusion 34 comes into contact with the main piece 530, thereby preventing excessive deformation of the extension 53.

Here, the cover body 50 is configured to diffuse the light (illumination light) emitted from the light source module 1. Specifically, light diffusing properties are imparted to the cover main body 50 by filling the synthetic resin forming the cover main body 50 (or the entire cover 5) with a light diffusing filler. Most of the light emitted from the light source module 1 (LED 10) enters the cover body 50 from the inner surface (upper surface) of the cover body 50, and is diffused by the filler while reaching the outer surface (lower surface) of the cover body 50. The light is emitted to the outside of the cover 5 from at least a portion of the light. However, a part of the light emitted from the light source module 1 is reflected by the inner surface of the cover body 50 and returns toward the support member 3 . A part of the light reflected on the inner surface of the cover body 50 is transmitted through the cover body 50 after being reflected on the surface (lower surface) of each extension portion 53 of the cover 5 . However, a portion of the light emitted from the light source module 1 may be directly reflected by the surface (lower surface) of each extension portion 53.

Further, the through hole 32 penetrating the bottom plate 30 of the support member 3 is provided in a region S2 sandwiched between the light source module 1 (substrate 11) and the extension portion 53 (side piece 532). Therefore, after passing through the cover body 50, the infrared signal transmitted from the remote controller 7 is received by the light receiving part 40 through the through hole 32 without passing through the extension part 53 (broken line X1 in FIG. 6). reference). In other words, since the cover body 50 is the only element that attenuates the infrared signal received by the light receiving section 40, by suppressing the attenuation of the infrared signal until it passes through the through hole 32 of the support member 3, the light receiving section 40 It is possible to improve the light-receiving sensitivity in.

Here, the extending portion 53 is preferably formed so that its surface (lower surface) has a higher reflectance for visible light than the inner surface of the cover main body 50 for visible light. For example, when the extension part 53 and the cover main body 50 are integrally formed by two-color molding, the type or amount of filler filled in the synthetic resin forming the extension part 53 may be changed depending on the type or amount of filler used to form the cover main body 50. It is preferable to vary the type or amount of filler filled into the synthetic resin. Alternatively, the front surface (lower surface) of the extending portion 53 may be formed by two-layer two-color molding so that the reflectance to visible light is higher than the back surface (upper surface) of the extending portion 53. That is, the first layer 53A including the back surface of the extending portion 53 is formed of a synthetic resin filled with the same type and amount of filler as the cover body 50, and the second layer 53B including the surface of the extending portion 53 may be formed of a synthetic resin filled with a different type of filler than the cover body 50 or with the same type of filler but in a different amount (see FIG. 7). Alternatively, the reflectance for visible light may be increased by applying paint to the surface of the extending portion 53 formed of the same synthetic resin as the cover body 50.

(2-2) Advantages of the lighting fixture according to the embodiment As described above, the lighting fixture A1 can cause the light receiving section 40 to receive an optical signal (infrared signal) through the through hole 32 that the support member 3 has. Therefore, the lighting fixture A1 can improve the light receiving sensitivity in the light receiving section 40 by suppressing attenuation of the optical signal until it passes through the through hole 32 of the support member 3. Moreover, in the lighting fixture A1, since the cover 5 is provided with the extension part 53 that projects in a direction approaching the light source module 1 along the first surface 30A of the bottom plate 30, the light emitted from the light source module 1 is emitted by the extension part 53. You can adjust the light distribution. For example, by making the surface (lower surface) of the extending portion 53 a reflective surface, the lighting fixture A1 can improve the light extraction efficiency.

In addition, the lighting fixture A1 protects the light source module 1 and controls the light distribution of light emitted from the light source module 1 by a cover 5 that covers the light source module 1 from a direction (downward) facing the first surface 30A of the bottom plate 30. (for example, diffusion). However, the cover 5 may have one or more lenses and may be configured to control the light distribution using the lenses.

Note that the cover 5 covers the through hole 32 from the direction (downward) facing the first surface 30A of the bottom plate 30 (see FIG. 6). That is, the infrared signal transmitted from the remote controller 7 passes through the cover body 50 of the cover 5 and is then received by the light receiving section 40 through the through hole 32. However, unlike the conventional example described in Patent Document 1, the lighting fixture A1 has only the cover 5 (cover body 50) as the element that attenuates infrared signals, so the cover 5 protects the light source module 1. At the same time, the light receiving sensitivity of the light receiving section 40 can be improved.

Furthermore, since the lighting fixture A1 adjusts the supply of power from the power supply device 20 to the light source module 1 according to the infrared signal received by the light receiving section 40, the power supply device 20 can be remotely controlled. Note that lighting fixture A1 uses infrared light (infrared rays) as a medium for optical signals, so for example, compared to a case where visible light is used as a medium, it is less sensitive to light emitted from other lighting equipment (visible light), etc. This makes it possible to improve the accuracy of receiving the optical signal in the light receiving section 40.

In addition, since the lighting fixture A1 reflects the light emitted from the light source module 1 at the extension part 53 of the cover 5, the number of parts can be reduced compared to the case where a reflective member is provided separately from the cover 5. Cost and assembly process can be reduced. Moreover, in the lighting fixture A1, the extending portion 53 protrudes from the end of the cover 5 (cover main body 50) in a direction approaching the light source module 1 along the first surface 30A, so that the first surface 30A of the bottom plate 30 By covering a portion with the extending portion 53, it is possible to improve the light extraction efficiency of the light emitted from the light source module 1. In the lighting fixture A1, the light extraction efficiency can be further improved by tilting the lower surface of the extending portion 53 in a direction that moves away from the light source module 1 as it moves away from the first surface 30A.

Furthermore, since the lighting fixture A1 includes the protrusion 34 on the support member 3, the mechanical strength of the support member 3 can be improved compared to a case where the protrusion 34 is not provided. Furthermore, in the lighting fixture A1, by making the protrusion 34 protrude from the first surface 30A of the bottom plate 30, there is a possibility that the light receiving unit 40 may mistakenly receive an infrared signal arriving from the side of the fixture main body 6 in the lateral direction. can be reduced.

Here, since the lighting fixture A1 covers at least a part of the protrusion 34 with the extension part 53, the surface of the protrusion 34 may be subjected to treatment such as painting in order to improve the light extraction efficiency of the light source module 1. becomes unnecessary. As a result, the manufacturing cost of the lighting fixture A1 can be reduced.

Further, in the lighting fixture A1, since a part of the extending portion 53 (the tip of the side piece 532) is in contact with the first surface 30A of the bottom plate 30 (see FIG. 6), when some external force is applied to the cover 5, , excessive deformation of the extending portion 53 can be suppressed.

Here, because the main piece 530 of the extension 53 is formed in a V-shape, a gap 533 is generated between the main piece 530 and the bottom plate 30 (see FIG. 6). Therefore, the lighting fixture A1 can effectively utilize the gap 533, which would otherwise be dead space, by accommodating various components, for example, screws 300 for fixing the mounting members that attach the support member 3 to the fixture body 6 to the bottom plate 30, in the gap 533. Note that the components that can be accommodated in the gap 533 are not limited to screws.

Moreover, the lighting fixture A1 has the following advantages by arranging the infrared module 4 at a position adjacent to the power supply unit 2.

The smaller the difference between the frequency of common mode noise flowing from the power supply device 20 of the power supply unit 2 to the support member 3 via the power supply case 21 and the frequency of the carrier wave of the infrared signal (33kHz to 40kHz), the more the common mode noise is affected by the received signal. There is a high possibility of interference. If the common mode noise interferes with the received signal, the possibility that the power supply unit 2 will malfunction or become inoperable increases.

Therefore, in the lighting fixture A1, since the infrared module 4 is arranged adjacent to the power supply unit 2, it is necessary to shorten the electric wire 46 (see FIG. 4) that electrically connects the infrared module 4 and the power supply unit 2. I can do it. That is, the lighting fixture A1 can reduce the possibility that the received signal will interfere with common mode noise by shortening the electric wire 46 that electrically connects the infrared module 4 and the power supply unit 2. As a result, the lighting fixture A1 can improve noise resistance (S/N ratio) in infrared signals.

Furthermore, since the case 43 of the infrared module 4 is attached to the power supply case 21 of the power supply unit 2, the lighting fixture A1 can further shorten the electric wire 46 that electrically connects the infrared module 4 and the power supply unit 2. . As a result, the lighting fixture A1 can further improve noise resistance in infrared signals.

Here, if the light-receiving lens 401 of the light-receiving unit 40 is placed outside the case 43, the receiving range of the infrared signal becomes too wide, so there is a risk that the infrared signal transmitted to another lighting device may be received. be.

In contrast, lighting fixture A1 allows the light receiving unit 40 to receive infrared signals through the opening 44 of the case 43, thereby narrowing the range in which the light receiving unit 40 can receive infrared signals. As a result, lighting fixture A1 can reduce the possibility of erroneously receiving an infrared signal transmitted to another lighting fixture.

Furthermore, the opening 44 of the case 43 overlaps the through hole 32 of the support member 3 along the thickness direction of the bottom plate 30. Therefore, the infrared signal transmitted from the remote controller 7 is received by the light receiving section 40 through the through hole 32 of the support member 3 and through the opening 44 of the case 43. For example, if the light-receiving lens 401 of the light-receiving unit 40 is placed on the surface (lower surface) of the support member 3 (bottom plate 30), the receiving range of infrared signals becomes too wide. There is a risk that you may receive

On the other hand, the lighting fixture A1 narrows down the range in which the light receiving section 40 can receive the infrared signals by causing the light receiving section 40 to receive the infrared signals from the through hole 32 of the support member 3 through the opening 44 of the case 43. be able to. As a result, the lighting fixture A1 can reduce the possibility of erroneously receiving an infrared signal transmitted to another lighting fixture. However, the light receiving lens 401 of the light receiving section 40 may be inserted into the through hole 32 to improve the light receiving sensitivity. In this case, the tip (lower end) of the light receiving lens 401 may or may not protrude downward from the first surface 30A of the bottom plate 30.

By the way, the through hole 32 is provided at a position that does not overlap the light source module 1 when viewed from the thickness direction of the bottom plate 30 (see FIG. 6). For example, when a through hole is provided at a position overlapping with the light source module 1, the hole is provided at a position overlapping with the through hole in the substrate 11, so that the pitch of the LEDs 10 becomes partially large in the vicinity of the hole. As a result, the degree of uniformity of the light distribution characteristics of the light source module may deteriorate.

On the other hand, the lighting fixture A1 can equalize the light distribution characteristics of the light source module 1 while reducing the possibility of erroneously receiving an infrared signal transmitted to another lighting fixture.

Furthermore, in the lighting fixture A1, a cylindrical peripheral wall 45 may be provided around the opening 44 of the case 43 (see FIG. 8). The peripheral wall 45 protrudes from the case 43 so as to surround the opening 44 on the surface (lower surface) of the case 43. Note that it is preferable that the tip (lower end) of the peripheral wall 45 contact the second surface 30B (upper surface) of the bottom plate 30, or be close enough to not contact it. When the tip of the peripheral wall 45 is brought into contact with the second surface 30B of the bottom plate 30, it is possible to prevent foreign substances such as insects from entering the first surface 30A of the bottom plate 30 through the opening 44. Alternatively, if the tip of the peripheral wall 45 is not brought into contact with the second surface 30B of the bottom plate 30, a tape made of a material that can transmit infrared rays may be attached to the tip of the peripheral wall 45 to prevent foreign matter from entering.

The infrared signal that has passed through the through hole 32 of the bottom plate 30 reaches the opening 44 of the case 43 while being reflected on the inner peripheral surface of a peripheral wall 45 provided in the case 43 and is received by the light receiving section 40. Therefore, in the lighting fixture A1, the light receiving sensitivity in the light receiving section 40 can be further improved compared to a case where the peripheral wall 45 is not provided.

Note that the inner peripheral surface of the peripheral wall 45 may be formed in the shape of a truncated cone, with the inner diameter decreasing from the tip (lower end) of the peripheral wall 45 toward the opening 44 . If the inner peripheral surface of the peripheral wall 45 is formed into a truncated conical shape, most of the infrared signals that enter the inside of the peripheral wall 45 through the through hole 32 can reach the opening 44 and be received by the light receiving section 40. can. In other words, lighting fixture A1 prevents the erroneous reception of unnecessary infrared signals (wireless signals transmitted to other lighting fixtures), while also preventing necessary infrared signals (infrared signals transmitted to lighting fixture A1). Receiving sensitivity can be increased.

By the way, there is a possibility that foreign objects such as insects may enter the first surface 30A of the bottom plate 30 from the second surface 30B side through the through holes 32 provided in the bottom plate 30. Therefore, a sheet-like member made of a material that can transmit infrared rays, for example, a tape (insulating tape) made of a synthetic resin material such as polyethylene terephthalate, is attached to the second surface 30B of the bottom plate 30 to seal the through hole 32 with the tape. It doesn't matter if you block it. By blocking the through hole 32 with tape, the effect of improving the sensitivity of the infrared signal in the light receiving section 40 is slightly reduced, but the intrusion of foreign matter can be prevented. Note that there are holes in the bottom plate 30 when a plurality of claws 301 are cut and raised. There is a possibility that foreign matter may enter from the first surface 30A side of the bottom plate 30 to the second surface 30B side through these holes. Therefore, in the light source unit B1, a tape is pasted on the second surface 30B of the bottom plate 30 to close the cut-and-raised hole. Therefore, the through hole 32 of the bottom plate 30 may be closed with tape that closes the cut and raised hole. By doing so, it is possible to reduce the number of tapes used and to simplify the process of attaching the tapes.

Here, assume a lighting space E1 in which a large number of lighting fixtures A1 are installed on the ceiling at equal intervals (see FIG. 9). This lighting space E1 is, for example, one floor of an office building, and a plurality of lighting fixtures A1 are installed so as to be lined up at equal intervals vertically and horizontally. Note that the interval between the plurality of lighting fixtures A1 in the vertical direction (the longitudinal direction of the light source unit B1) is expressed as P1, and the interval in the horizontal direction (the lateral direction of the light source unit B1) is expressed as P2.

For example, when the operator H1 operates the remote controller 7 to turn on only one lighting fixture A1 directly above, the possibility that the infrared signal transmitted from the remote controller 7 will be received by the neighboring lighting fixture A1 is reduced. It is desirable to do so. In other words, the range in which the light receiving section 40 of each lighting fixture A1 can receive an infrared signal is narrower than the sum of the longitudinal length of the lighting fixture A1 and twice the vertical distance P1, and It is preferably narrower than the sum of the length in the hand direction and twice the distance P2 in the lateral direction. However, the reach range of the infrared signal transmitted from the remote controller 7 is, for example, an angle of 20 degrees from the tip of the remote controller 7 and a distance of 5 m to 6 m from the tip of the remote controller 7.

Therefore, the lighting fixture A1 can be made unnecessary by setting the size of the opening 44, the size of the through hole 32, and the size of the peripheral wall 45 (axial length and inner diameter) to appropriate values. It is possible to increase the reception sensitivity of necessary infrared signals while preventing the reception of necessary infrared signals.

By the way, in the lighting fixture A1, abnormal noise may occur due to the difference in thermal expansion coefficient between the metal support member 3 and the synthetic resin cover 5. In other words, at the contact surface between the support member 3 and the cover 5, when the expansion and contraction force of the cover 5 made of synthetic resin with a relatively large coefficient of thermal expansion exceeds the maximum static friction force, the strain that occurs in the cover 5. is suddenly opened. When the strain in the cover 5 is suddenly released, a friction sound accompanied by vibration is generated at the contact surface of the cover 5 with the support member 3. Such a phenomenon is generally known as a stick-slip phenomenon. It is considered that abnormal noise due to the stick-slip phenomenon is more likely to occur as the contact area between the two members (supporting member 3 and cover 5) becomes larger.

Therefore, in the lighting fixture A1, a plurality of ribs 510 are provided along the longitudinal direction of the cover body 50 on the surface of the pair of projecting walls 51 of the cover 5 that faces the side plate 31 (see FIG. 7). These ribs 510 are formed at a height that allows them to come into contact with the side plate 31. In other words, since the pair of projecting walls 51 of the cover 5 can contact the pair of side plates 31 of the support member 3 at the tips of the ribs 510, the cover 5 and the support member The contact area with 3 is reduced. As a result, the lighting fixture A1 can suppress the generation of abnormal noise due to the stick-slip phenomenon. However, the location where the rib 510 is provided is not limited to the projecting wall 51, and may be provided on the side plate 31 of the support member 3.

By the way, the lighting fixture A1 according to the embodiment includes a fixture body 6 fixed to construction materials such as a ceiling, and a light source unit B1 detachably attached to the fixture body 6, but the configuration of the light source unit B1 is The support member, which is an element, may be constructed integrally with the instrument main body. Note that it is obvious that the lighting fixture according to the embodiment has the above-mentioned advantages even when the support member and the fixture body are integrally configured.

(3) Modifications of the lighting fixture according to the embodiment Next, some modifications of the lighting fixture A1 according to the embodiment will be described. However, the basic configuration of the lighting fixture A1 of each modified example described below is the same as the basic configuration of the lighting fixture A1 according to the embodiment. Therefore, configurations that are common and substantially common to the basic configuration of the lighting fixture A1 according to the embodiment are given the same reference numerals, and illustrations and descriptions thereof will be omitted as appropriate. Note that in the following description, "substantially common configuration" means configurations that are somewhat different in shape, size, etc., but have a common function.

(3-1) Modification example 1
The lighting fixture A1 of Modification 1 is characterized by the extension portion 53 of the cover 5. For example, as shown in FIG. 10A, the extending portion 53 in Modification 1 has the tip (upper end) of the side piece 532 separated from and not in contact with the first surface 30A of (the bottom plate 30 of) the support member 3. In other words, since the tip of the side piece 532 does not come into contact with the support member 3, it is possible to suppress the generation of abnormal noise due to the stick-slip phenomenon described above.

Furthermore, the extending portion 53 in Modified Example 1 does not need to have the side piece 532 (see FIG. 10B). In this case, the tip of the main piece 530 of the extending portion 53 may or may not be in contact with the first surface 30A of the bottom plate 30.

Alternatively, a portion of the main piece 530 of the extending portion 53 in Modification 1 that is inside the protrusion 34 of the support member 3 may be formed to be approximately parallel to the first surface 30A of the bottom plate 30. (See Figure 10C). At this time, it is preferable that the main piece 530 and the through hole 32 of the bottom plate 30 do not overlap when viewed from the thickness direction (vertical direction) of the bottom plate 30. However, a portion of the main piece 530 may overlap the through hole 32. When a portion of the main piece 530 overlaps the through hole 32, light other than infrared signals (for example, visible light emitted from the light source module 1) is suppressed from passing through the through hole 32, and the light receiving portion (40) is It is possible to improve the light receiving sensitivity.

Here, at least a portion of the extending portion 53 may be formed (two-color molding) of a material (synthetic resin material) different from that of the cover body 50 (see FIG. 10D). For example, the entire extension part 53 is filled with a filler to form a white color, and the cover main body 50 is filled with a smaller amount of filler than the extension part 53, or is filled with a different filler. It does not matter if it is formed in a milky white color. Note that the tip of the extending portion 53 may or may not contact the first surface 30A of the bottom plate 30 of the support member 3. When the tip of the extending portion 53 is brought into contact with the first surface 30A of the bottom plate 30, there is an advantage that intrusion of foreign matter can be suppressed.

Further, instead of a part of the main piece 530, the entire main piece 530 may be formed to be substantially parallel to the first surface 30A of the bottom plate 30 (see FIG. 11). At this time, it is preferable that the support member 3 does not have the pair of protrusions 34, and both end portions of the bottom plate 30 in the short direction are formed flat. Although the bottom plate 30 is formed so that the central portion that supports the light source module 1 protrudes above both end portions, the central portion may be formed so as to protrude below both end portions. . Alternatively, the entire bottom plate 30 may be formed flat.

Note that a portion of the extending portion 53 (a portion other than the portion adjacent to the through hole 32) may be in contact with the lower surface of the substrate 11. In this case, since the substrate 11 can be supported by a portion of the extending portion 53, the plurality of claws 301 provided on the bottom plate 30 are not required, and manufacturing costs can be reduced.

(3-2) Modification example 2
The lighting fixture A1 of the second modification is characterized in that a reflective member is provided on the substrate 11 of the light source module 1. That is, the substrate 11 in Modification 2 is constituted by a flexible printed wiring board using a flexible synthetic resin film as an insulating substrate. The substrate 11 includes a mounting section 110 formed in a long rectangular shape and a pair of reflective sections 111 provided at both ends of the mounting section 110 in the short direction (see FIG. 12). The mounting portion 110 and the pair of reflective portions 111 are integrally formed with an insulating film made of a material having flexibility and electrical insulation, such as polyimide.

The mounting section 110 has many LEDs 10 mounted in the center of the short side. The pair of reflecting sections 111 are formed in a rectangular shape and are bent diagonally downward from both ends of the short side of the mounting section 110. In other words, the surface (lower surface) of each of the pair of reflecting sections 111 corresponds to a reflective surface.

Here, a through hole 112 is provided in the mounting portion 110 at a position facing the through hole 32 of the bottom plate 30 (see FIG. 12). That is, the infrared signal transmitted from the remote controller 7 is received by the light receiving section 40 through the through hole 112 of the mounting section 110 and the through hole 32 of the bottom plate 30.

In the lighting fixture A1 of the second modification, since the reflective member is provided on the substrate 11 of the light source module 1, it is possible to reduce the manufacturing cost by reducing the number of parts.

(3-3) Modification example 3
The lighting fixture A1 of Modification 3 is characterized by the shape of the cover 5. That is, the cover 5 in Modification 3 is formed in the shape of a long corner horn with an open top surface (see FIG. 13). Furthermore, in the lighting fixture A1 of Modification 3, the fixture main body 6 and the support member 3 are integrally formed of a metal material (for example, aluminum or aluminum alloy).

The cover 5 has a bottom plate portion 500 that faces the substrate 11 of the light source module 1 in the vertical direction, and a pair of side plate portions 501 that stand upward from both ends of the short side direction (left and right direction in FIG. 13) of the bottom plate portion 500. The bottom plate portion 500 and the pair of side plate portions 501 are integrally formed from a synthetic resin having translucency, such as acrylic resin or polycarbonate resin.

The bottom plate portion 500 is formed in a rectangular flat plate shape. The bottom plate portion 500 is transparent or diffusive.

The pair of side plate portions 501 are formed in a rectangular flat plate shape. The inner surfaces of the pair of side plates 501 have higher reflectance for visible light than the inner surfaces (upper surface) of the bottom plate 500. That is, in the lighting fixture A1 of the third modification, the pair of side plates 501 of the cover 5 correspond to reflective members, and the inner surfaces of the pair of side plates 501 correspond to reflective surfaces. Note that the pair of side plates 501 may have a lower transmittance to visible light than the bottom plate 500, or may have diffusivity. However, the pair of side plates 501 may be formed of the same material as the bottom plate 500 and have the same transmittance and reflectance as the bottom plate 500. Note that even if the pair of side plate parts 501 are formed of a translucent material, a part of the light from the light source module 1 that reaches the inner surface of the side plate parts 501 is reflected, so the translucent The side plate portion 501 having the above also corresponds to a reflective member. The cover 5 is attached to the support member 3 (instrument main body 6) by hooking the extension portions 53 provided at the upper end of each side plate portion 501 to the pair of side plates 31 of the support member 3.

In the bottom plate 30 of the support member 3, a through hole 32 is provided between the light source module 1 and the extension portion 53. Therefore, the infrared signal transmitted from the remote controller 7 is transmitted through the cover 5 and then received by the light receiving section 40 through the through hole 32 of the support member 3. Further, a part of the light emitted from the light source module 1 is reflected by the reflecting surface (the inner surface of the side plate part 501), and then transmitted through the bottom plate part 500 and irradiated to the outside.

Note that the pair of side plate portions 501 may be formed in a V-shape as shown in FIG. 14. Alternatively, the pair of side plate portions 501 may be inclined outward from the upper end toward the lower end, as shown in FIG. 15.

Therefore, in the lighting fixture A1 of Modification Example 3, since the reflective member is provided integrally with the cover 5, it is possible to reduce the manufacturing cost by reducing the number of parts. Furthermore, in the lighting fixture A1 of the third modification, the reflective surface (the inner surface of the side plate portion 501) is a surface perpendicular to the first surface 30A of the bottom plate 30, so that the illuminance immediately below the fixture body 6 can be increased. I can do it.

(3-4) Modification example 4
The lighting fixture A1 of Modification 4 is characterized by the structure of both ends of the support member 3 in the lateral direction, including the pair of side plates 31.

Both ends of the support member 3 in the lateral direction (hereinafter sometimes simply referred to as "ends of the support member 3") in Modification 4 are connected to the L-shaped protrusion 34 and from the tip of the protrusion 34. It has a side plate 31 that projects upward (see FIG. 16A). Note that the tip (upper end) of the side plate 31 is located at approximately the same height as the second surface 30B of the side plate 31 in the thickness direction (vertical direction) of the bottom plate 30. Alternatively, the tip portion of the protrusion 34 may be hemmed (see FIG. 19B) or curled. Note that when the tip portion of the protrusion 34 is hemmed or curled, it may be bent toward the upper surface of the protrusion 34 (see FIG. 19B) or may be bent toward the lower surface of the protrusion 34. Furthermore, the bottom plate of the protrusion 34 may be formed to be inclined outwardly and upwardly (see FIG. 16C). Alternatively, the bottom portion 340 of the protrusion 34 may be formed so as to slope outward and downward (see FIG. 17A).

Moreover, the protrusion 34 may be formed in a V-shape (see FIGS. 17B and 17C). Furthermore, the protrusion 34 may be formed in a semi-cylindrical shape (see FIG. 17D). Alternatively, at least one of the inner side 341 and the outer side 342 of the protrusion 34 may be formed to be inclined with respect to the thickness direction (vertical direction) of the bottom plate 30 (see FIGS. 18A to 18C). ).

Furthermore, the inner side portion 341 of the protrusion 34 may be formed in a stepped shape (see FIGS. 19A and 19B). In this case, the upper end of the outer side portion 342 may be located at a higher position than the second surface 30B of the bottom plate 30 (see FIG. 19A), or may be located at approximately the same height as the second surface 30B. (See Figure 19B).

Further, the inner side portion 341 of the protrusion 34 may be formed in a stepped shape, and the outer side portion 342 may be hemmed and bent (see FIG. 20A). Alternatively, the protrusion 34 may be formed in the shape of a horn, and the upper end of the outer side portion 342 may be formed to protrude outward (see FIG. 20B). Note that the outer side portion 342 may be formed in a stepped shape (see FIG. 20C).

Furthermore, the protrusion 34 may be formed such that at least one of the bottom 340, the inner side 341, and the outer side 342 is inclined (see FIGS. 21A to 21D).

Alternatively, beads 302 may be provided inside the protrusions 34 on the bottom plate 30 of the support member 3 (see FIGS. 22A and 22B). Note that the through hole 32 may be provided on the bottom surface of the bead 302. By providing the bead 302 on the bottom plate 30 in this manner, the strength of the support member 3 can be improved.

(3-5) Modification example 5
The lighting fixture A2 of Modification Example 5 is characterized in that the fixture body 6 is formed in a square shape in plan view, and a plurality of (three in the illustrated example) light source units B2 are attached to the lower surface of the fixture body 6 (Fig. 23).

The appliance main body 6 in Modification 5 is installed so as to be directly attached to or embedded in the ceiling or wall.

The basic configuration of the three light source units B2 is common. That is, the three light source units B2 commonly include the light source module 1, the support member 3, and the cover 5. Moreover, one of the light source units B2 further includes an infrared module 4 (see FIG. 24). However, each of the two or three light source units B2 may be provided with the infrared module 4.

The support member 3 is configured such that a pair of side plates 31 protrude from both ends of a flat bottom plate 30 in the lateral direction. In the bottom plate 30, a through hole 32 is provided in a region between the light source module 1 and the extending portion 53 on one side (right side in FIG. 24). A light receiving section 40 of the infrared module 4 is arranged above the through hole 32 .

The cover 5 in the lighting fixture A2 of Modification 5 includes a flat cover body 50, a pair of projecting walls 51 that project upwardly and outwardly from both ends of the cover main body 50 in the short direction, and a pair of projecting walls 51 that project upwardly and outwardly from both ends of the cover main body 50 in the short direction. It has a pair of extension parts 53 that protrude inward from the upper end of the wall 51. Note that the pair of protruding walls 51 may have lower transmittance to visible light than the cover body 50, or may have diffusivity.

In the lighting fixture A2 of modification 5, the infrared signal transmitted from the remote controller 7 passes through the cover 5 and is then received by the light receiving unit 40 through the through hole 32 of the support member 3. Further, a part of the light emitted from the light source module 1 is reflected by the reflecting surface (inner surfaces of the pair of protruding walls 51 of the cover 5) and then irradiated to the outside.

(3-6) Modification example 6
The lighting fixture A1 of modification 6 is characterized in that a void provided in the substrate 11 of the light source module 1 is arranged at a position facing the through hole 32 of the bottom plate 30 in the thickness direction (vertical direction) of the bottom plate 30. There is.

The void provided in the substrate 11 is, for example, a notch 113 provided in the substrate 11. The cutout 113 is preferably provided at a location on the front surface (lower surface) of the board 11 avoiding printed wiring, for example, at one end edge in the short direction of the board 11 (see FIG. 25). However, the space may also be used as a notch provided for another purpose, for example, a notch 113 provided at the short end of the substrate 11 to avoid the claw 301 cut and raised from the bottom plate 30. (See Figure 26).

Further, the void space is not limited to the notch 113. For example, the void may be a hole 114 that penetrates the substrate 11 in the thickness direction (vertical direction) (see FIG. 27A). Note that the space (notch 113 and hole 114) on the board 11 may be provided at a location that can maintain a necessary and sufficient distance from the LED 10 mounted on the surface of the board 11 and the printed wiring on the surface of the board 11. Bye. For example, the space may be provided at the center of the substrate 11 in the lateral direction and between the LEDs 10 arranged along the longitudinal direction of the substrate 11. Further, the depth of the notch 113 (the length along the width direction of the substrate 11) may be longer than the diameter of the through hole 32 (see FIG. 25), or may be shorter than the diameter of the through hole 32 and 32 may partially protrude outside the notch 113 (see FIG. 26).

Furthermore, the tip of the extending portion 53 may be in contact with the front surface (lower surface) of the substrate 11 (see FIG. 27B). In this case, at least a portion of the extending portion 53 may be formed of a material (synthetic resin material) different from that of the cover body 50 (two-color molding). For example, the entire extension part 53 is filled with a filler to form a white color, and the cover main body 50 is filled with a smaller amount of filler than the extension part 53, or is filled with a different filler. It does not matter if it is formed in a milky white color.

Further, a side piece 532 may be provided such that the tip of the main piece 530 of the extending portion 53 touches the surface (lower surface) of the substrate 11 and protrudes from the main piece 530 toward the bottom plate 30 (see FIG. 28). In this case, the tip of the side piece 532 may or may not be in contact with the first surface 30A of the bottom plate 30. When the tip of the side piece 532 comes into contact with the first surface 30A of the bottom plate 30, there is an advantage that intrusion of foreign matter can be suppressed.

In the lighting fixture A1 of modification example 6, the space (notch 113) in the substrate 11 is arranged at a position vertically facing the through hole 32 of the bottom plate 30, so that the distance between the extension part 53 and the substrate 11 can be shortened. I can do it. Therefore, in the lighting fixture A1 of the sixth modification, for example, the tip of the extending portion 53 can be brought into contact with the surface (lower surface) of the substrate 11, and the extending portion 53 can support the substrate 11. In the lighting fixture A1 of the sixth modification, by supporting the substrate 11 with the extension portion 53, there is no need to provide the plurality of claws 301 on the support member 3, so that manufacturing costs can be reduced.

Here, the cylindrical portion 33 may be provided around the through hole 32 on the first surface 30A of the bottom plate 30. The cylindrical portion 33 is, for example, formed into a cylindrical shape and inserted into the hole 114 of the substrate 11 (see FIG. 29A). Alternatively, the cylindrical portion 33 may be formed into a truncated cone shape (see FIG. 29B). Further, a circular hole 330 may be provided in the bottom surface of the cylindrical tube portion 33 (see FIG. 29C). Note that the cylindrical portion 33 may be provided around the through hole 32 on the second surface 30B of the bottom plate 30 (see FIG. 29D). Note that these plural types of cylindrical portions 33 can be formed by performing burring, drawing, or molding on the support member 3 formed of a metal plate. Furthermore, the cylindrical portion 33 may be provided at a position that does not overlap the substrate 11 when viewed from the thickness direction (vertical direction) of the bottom plate 30.

By providing the cylindrical portion 33 around the through hole 32 on the first surface 30A or the second surface 30B of the bottom plate 30, disturbance light such as light emitted from the light source module 1 is prevented from passing through the through hole 32. It becomes difficult. Therefore, the lighting fixture A1 of the sixth modification can suppress the reception of disturbance light by the light receiving section 40 and improve the light receiving sensitivity. Furthermore, the lighting fixture A1 of the ninth modification can further improve the light receiving sensitivity of the light receiving section 40 by reflecting the infrared signal on the inner circumferential surface of the cylindrical portion 33.

Incidentally, the size (diameter) of the hole 114 in the substrate 11 may be the same as the size (diameter) of the through hole 32 in the bottom plate 30, but may be different. For example, when the size of the hole 114 in the substrate 11 is larger than the size of the through hole 32 in the bottom plate 30 (see FIG. 30A), the angle of the infrared signal L1 that can pass through the through hole 32 in the bottom plate 30 (in the thickness direction of the bottom plate 30 angle of inclination) can be made relatively narrower. Therefore, in this case, there is an advantage that remote control by the remote controller 7 can be easily performed in places where the height from the floor to the lighting fixture A1 is quite high, such as factories and distribution warehouses.

On the other hand, when the size of the hole 114 in the board 11 is smaller than the size of the through hole 32 in the bottom plate 30 (see FIG. 30B), there is an advantage that it is easy to secure the insulation distance between the hole 114 in the board 11 and the printed wiring of the board 11. be. Moreover, the substrate 11 can transmit infrared signals to a greater extent than the metal bottom plate 30, so compared to the case where the hole 114 of the substrate 11 is larger than the through hole 32 of the bottom plate 30. Therefore, the angle of the infrared signal L1 that can pass through the through hole 32 of the bottom plate 30 can be increased. Therefore, in this case, in a place where the height from the floor to the lighting fixture A1 is not high, such as in a general office, it is possible to remotely control the lighting fixture A1 by operating the remote controller 7 from diagonally below the lighting fixture A1. , is suitable for a situation where a plurality of lighting fixtures A1 are installed on the ceiling.

Further, the size of the through hole 32 of the bottom plate 30 may be the same as the size (diameter) of the opening 44 of the case 43 that accommodates the light receiving section 40, but may be different. For example, if the size of the through hole 32 of the bottom plate 30 is smaller than the size of the opening 44 of the case 43 (see FIG. 30C), the angle of the infrared signal L1 that can pass through the through hole 32 of the bottom plate 30 is relatively narrow. can. Therefore, in this case, there is an advantage that remote control by the remote controller 7 can be easily performed in places where the height from the floor to the lighting fixture A1 is quite high, such as factories and distribution warehouses.

On the other hand, when the size of the through hole 32 of the bottom plate 30 is larger than the size of the opening 44 of the case 43 (see FIG. 30D), the case 43 made of synthetic resin is more or less infrared resistant than the bottom plate 30 made of metal. Since the signal can be transmitted through the opening 44 of the case 43, the angle of the infrared signal L1 that can pass through the opening 44 of the case 43 is greater than when the opening 44 of the case 43 is larger than the through hole 32 of the bottom plate 30. can be made larger. Therefore, in this case, in a place where the height from the floor to the lighting fixture A1 is not high, such as in a general office, it is possible to remotely control the lighting fixture A1 by operating the remote controller 7 from diagonally below the lighting fixture A1. , is suitable for a situation where a plurality of lighting fixtures A1 are installed on the ceiling.

(3-7) Modification example 7
The lighting fixture A1 of Modification 7 includes a component 35 that is attached to the through hole 32 of the bottom plate 30 (see FIGS. 31A to 31D).

The component 35 is made of synthetic resin, for example. The component 35 includes a cylindrical main body 350 inserted into the through hole 32, a flange 351 provided at one axial end (upper end) of the main body 350, and a flange 351 provided at the other axial end (lower end) of the main body 350. (See FIG. 31A).

The component 35 is attached to the bottom plate 30 by inserting the main body 350 into the through hole 32 and hooking the hook portion 352 around the through hole 32 on the first surface 30A of the bottom plate 30. Note that since the outer diameter of the flange portion 351 is larger than the diameter of the through hole 32, the component 35 does not slip out to the first surface 30A side of the bottom plate 30.

Therefore, in the lighting fixture A1 of Modification Example 7, the range through which infrared signals are passed from the first surface 30A side of the bottom plate 30 to the second surface 30B side can be adjusted by the component 35 attached to the through hole 32. can. In other words, since the hole diameter of the main body 350 of the component 35 is smaller than the diameter of the through hole 32, the angle (angle of inclination with respect to the thickness direction of the bottom plate 30) of the infrared signal that can pass through the hole of the main body 350 becomes relatively narrow. . Therefore, in this case, there is an advantage that remote control using a remote controller can be easily performed in places where the height from the floor to the lighting fixture A1 is quite high, such as factories and distribution warehouses.

Furthermore, the component 35 may include a membrane portion 353 that closes the opening on the lower end side of the main body 350 (see FIG. 31B). The membrane portion 353 is made of the same synthetic resin as the main body 350 and is formed integrally with the main body 350 . However, the film portion 353 is formed to have a thickness that allows infrared signals to pass through. In the lighting fixture A1 of Modification Example 7, the opening at the lower end of the main body 350 is closed with a membrane portion 353 that can transmit infrared signals, thereby preventing the intrusion of foreign substances such as insects.

Note that the component 35 does not need to have the hook portion 352 (see FIG. 31C). In this case, the component 35 is preferably fixed to the bottom plate 30 by an appropriate method such as adhesion.

Moreover, the main body 350 of the component 35 may protrude upwards beyond the collar portion 351 (see FIG. 31D). In the lighting fixture A1 of Modification Example 7, by making the main body 350 protrude above the collar portion 351, it is possible to improve the reception sensitivity of the infrared signal in the light receiving section 40.

Here, the component 35 may be formed white by being filled with a filler that reflects visible light. Alternatively, the component 35 may be formed black by being filled with a filler that absorbs visible light.

When the component 35 is formed in white, the lighting device A1 of variant 7 can improve the receiving sensitivity of the infrared signal at the light receiving unit 40 by reflecting the infrared signal on the inner surface of the main body 350.

On the other hand, when the component 35 is formed in black, the lighting fixture A1 of Modification Example 7 absorbs the infrared signal on the inner peripheral surface of the main body 350, so that the angle at which the infrared signal can pass through the main body 350 is relatively narrow. can. Therefore, in this case, there is an advantage that remote control by the remote controller 7 can be easily performed in places where the height from the floor to the lighting fixture A1 is quite high, such as factories and distribution warehouses.

(3-8) Modification 8
The lighting device A1 of the eighth modification is characterized in that the hole 114 of the substrate 11 in the lighting device A1 of the sixth modification is formed as a plated through hole.

The holes 114 in the eighth modified example are formed as plated through holes plated with a conductor for printed wiring (copper foil 1140) (see FIG. 32). The holes 114 may be plated through holes with lands as in the illustrated example, but may also be plated through holes without lands. The plated through holes used as holes 141 for passing infrared signals may also be used as plated through holes for printed wiring formed in the substrate 11.

Therefore, in the lighting fixture A1 of the eighth modification, the hole 114 of the substrate 11 is formed by a plated through hole, so that the angle at which an infrared signal can pass through the hole 114 can be relatively narrow. Therefore, in this case, there is an advantage that remote control by the remote controller 7 can be easily performed in places where the height from the floor to the lighting fixture A1 is quite high, such as factories and distribution warehouses.

(3-9) Modification 9
The lighting fixture A1 of Modification 9 is characterized by the shape, size, number, arrangement, etc. of the through holes 32 provided in the bottom plate 30.

For example, the through hole 32 may be formed in a rectangular shape (see FIGS. 33A to 33C). It is preferable that the rectangular through hole 32 is formed to have a larger size than the light receiving section 40 (see FIGS. 33A and 33B). Alternatively, the rectangular through hole 32 may be formed so that its width in the short direction is narrower than the width of the light receiving section 40 (see FIG. 33C).

Further, a plurality of circular through holes 32 may be provided (see FIG. 33D). For example, three through holes 32 may be provided in a line, and the light receiving section 40 may be arranged to face the central through hole 32 (see FIG. 33D). However, the through hole 32 facing the light receiving section 40 is not limited to the central through hole 32, but may be a through hole 32 at either end. Furthermore, the light receiving section 40 may be arranged so as to partially overlap the through hole 32 when viewed from the thickness direction of the bottom plate 30.

Note that the through hole 32 of the bottom plate 30 may be provided at a position that does not overlap the light receiving section 40 when viewed from the thickness direction of the bottom plate 30 (see FIGS. 34A and 34B). The through hole 32 may be formed in a rectangular shape (see FIG. 34A) or circular (see FIG. 34B). Further, the number of through holes 32 may be one (see FIG. 34A) or may be plural (see FIG. 34B). In this case, an advantage is that infrared signals transmitted from directly below the lighting fixture A1 are less likely to be received by the light receiving unit 40, but infrared signals transmitted from diagonally below the lighting fixture A1 are more easily received by the light receiving unit 40. There is.

(3-10) Modification example 10
The lighting fixture A1 of Modification 10 is characterized by a through hole 32 provided in the bottom plate 30.

The bottom plate 30 of the support member 3 has holes (cut-out holes 303) for cutting and raising the multiple claws 301. The lighting device A1 of the modified example 10 uses a part of one of the multiple cut-out holes 303 in the bottom plate 30 as a through hole 32 (see FIG. 35A). The through hole 32 in the modified example 10 corresponds to the part of the cut-out hole 303 that overlaps with the notch 114 of the substrate 11. Alternatively, instead of using a part of the cut-out hole 303 as the through hole 32, the through hole 32 may be formed to connect to the cut-out hole 303 (see FIG. 35B).

Therefore, the lighting fixture A1 of Modification 10 uses a part of the cut-and-raised hole 303 provided in the bottom plate 30 as the through-hole 32, or by forming the through-hole 32 so as to be connected to the cut-and-raised hole 303. , the claw 301 and the through hole 32 can be provided together. As a result, the lighting fixture A1 of Modification 10 can reduce the number of manufacturing steps.

(3-11) Modification example 11
The lighting fixture A1 of Modification 11 is characterized in that the through hole 32 of the bottom plate 30 is closed with a sheet-like insulating member that can transmit infrared rays and has electrical insulation properties.

The case 43 in Modification 11 has an open surface (lower surface) facing the bottom plate 30 (see FIGS. 36A and 36B). The case 43 accommodates a circuit board 42 on which a light receiving section 40 and a signal circuit section are mounted. The light receiving lens 401 of the light receiving unit 40 faces the through hole 32 of the bottom plate 30 in the vertical direction.

An insulating member 36 is arranged on the second surface 30B of the bottom plate 30. The insulating member 36 is a sheet-like member made of a material that can transmit infrared rays, for example, a tape (insulating tape) made of a synthetic resin material such as polyethylene terephthalate. However, the insulating member 36 is not limited to an insulating tape, and may be formed of any material as long as it can transmit infrared rays and has electrical insulation properties.

Thus, in the lighting fixture A1 of Modification Example 11, by blocking the through hole 32 with the insulating member 36 that can transmit infrared rays, the bottom plate 30 can be passed through the through hole 32 without inhibiting the reception of the infrared signal by the light receiving section 40. It is possible to suppress foreign matter from entering the first surface 30A side.

(3-12) Modification example 12
The lighting fixture A1 of modification 12 is characterized in that the infrared module 4 is housed in the power supply case 21 together with the power supply device 20, and the through hole 32 of the bottom plate 30 is closed with an insulating member 36.

The light receiving section 40 and the signal circuit section 41 of the infrared module 4 in Modification 12 are mounted on the printed circuit board 22 of the power supply device 20 (see FIG. 37). The light receiving section 40 is mounted on the lower surface of the printed circuit board 22 and has a light receiving lens 401 facing the second surface 30B of the bottom plate 30. However, the infrared module 4 is mounted on a circuit board different from the printed circuit board 22 of the power supply device 20 (for example, the circuit board 42 in the embodiment), and is connected to the printed circuit board 22 via a connector mounted on the circuit board. They may be connected and housed in the power supply case 21. In this case, the infrared module 4 (its circuit board) may be housed in the power supply case 21 horizontally alongside the power supply 20 (its printed circuit board 22), or it may be housed vertically with the infrared module 4 facing down. I don't care if it's contained.

The insulating member 36 in Modification 12 includes a bottom plate 360 and a pair of side plates 361 bent upward from both ends of the bottom plate 360 along the longitudinal direction. Note that the longitudinal direction of the bottom plate 360 and the pair of side plates 361 are integrally formed by, for example, bending a sheet (insulating sheet) made of a synthetic resin material such as polyethylene terephthalate into a horn shape (see FIGS. 37 and 38A). .

The insulating member 36 is housed within the power supply case 21 (see FIGS. 37 and 38A). The insulating member 36 housed in the power supply case 21 has a bottom plate 360 that closes an opening on the lower surface of the power supply case 21 and a pair of side plates 361 arranged along the inner surface of the power supply case 21 . The insulating member 36 plays a role in ensuring an insulating distance between the circuit components and printed wiring of the printed circuit board 22 and the metal power supply case 21 and the support member 3 (bottom plate 30).

Thus, in the lighting fixture A1 of modification example 12, similarly to modification example 11, by blocking the through hole 32 with the insulating member 36 that can transmit infrared rays, the light receiving section 40 can receive an infrared signal without inhibiting the reception of the infrared signal. It is possible to prevent foreign matter from entering the first surface 30A of the bottom plate 30 through the through hole 32. Furthermore, in the lighting fixture A1 of the twelfth modification, the insulating member 36 also serves to ensure the insulation distance of the power supply device 20, so it is possible to reduce the manufacturing cost by reducing the number of parts. Furthermore, in the lighting fixture A1 of Modification Example 12, the case of the infrared module 4 is shared with the power supply case 21, so that manufacturing costs can be reduced due to a reduction in the number of parts. Furthermore, in the lighting fixture A1 of Modification 12, the infrared module 4 (light receiving section 40, signal circuit section 41, etc.) is mounted on the printed circuit board 22 of the power supply device 20, so the infrared module 4 and the power supply device 20 are connected. Electrical wires can be replaced with printed wiring. Therefore, in the lighting fixture A1 of Modification Example 12, the electric wire connecting the infrared module 4 and the power supply device 20 is not required, so that manufacturing costs can be reduced by reducing the number of parts and manufacturing steps.

Here, the insulating member 36 may include a top plate 362 protruding from the tip (upper end) of one side plate 361 (see FIG. 38B). That is, by arranging the top plate 362 between the printed circuit board 22 and the bottom of the power supply case 21, the insulation distance between the printed circuit board 22 and the power supply case 21 can be further increased.

Further, the insulating member 36 may be formed in a shape in which the bottom plate 360 is curved downward in an arc shape (see the broken line in FIG. 38C). Alternatively, the tip (upper end) of one side plate 361 of the insulating member 36 may be in contact with the printed circuit board 22 (see FIG. 38D). Note that the tip of the side plate 361 may be located at a portion other than the printed circuit board 22, for example, the inner bottom surface (top surface) of the power supply case 21, or may be formed on the side surface of the power supply case 21 in order to support the printed circuit board 22. It may also be a bridge or the like. In either case, when the power supply case 21 is attached to the support member 3, the insulating member 36 is deformed by being pushed by the bottom plate 30, and the gap between the insulating member 36, the bottom plate 30, and the power supply case 21 is narrowed. (See FIGS. 38C and 38D).

(3-13) Modification example 13
The lighting fixture A1 of Modification 13 is characterized by the structure of the case 43 of the infrared module 4.

The case 43 in the thirteenth modification has a synthetic resin case body 43A and a case cover 43B (see Figures 39A and 39B). The case body 43A is formed in a rectangular parallelepiped box shape with an open bottom. The case cover 43B is shallower (shorter in height in the vertical direction) than the case body 43A, and is also formed in a rectangular parallelepiped box shape with an open top. The case cover 43B is joined to the case body 43A so as to cover the opening on the bottom of the case body 43A.

An opening 44 is provided on the bottom surface of the case cover 43B. Opening 44 is a circular hole. Further, a cylindrical peripheral wall portion 440 is provided around the opening portion 44 on the inner bottom surface of the case cover 43B. The upper end of the peripheral wall portion 440 is open and faces the light receiving lens 401 of the light receiving portion 40 . The lower end of the peripheral wall portion 440 is closed with a thin partition wall 441. Note that the partition wall 441 may have a thickness that allows infrared signals to pass therethrough. Further, an annular rib 442 is provided around the opening 44 on the outer bottom surface of the case cover 43B.

The case 43 is attached to the power supply case 21 or the support member 3. When the case 43 is attached to the power supply case 21 or the support member 3, the lower end of the rib 442 contacts the periphery of the through hole 32 on the second surface 30B of the bottom plate 30 (see Figures 39A and 39B).

Thus, the lighting fixture A1 of modification 13 transmits the infrared signal transmitted from the remote controller 7 through the through hole 32 of the support member 3 (bottom plate 30) through the partition wall 441 of the case 43 (case cover 43B) and receives the infrared signal. 40 to receive the information. Furthermore, since the opening 44 of the case 43 is closed by the partition wall 441, foreign matter can be prevented from entering the case 43 through the opening 44. Furthermore, since the ribs 442 of the case cover 43B are in contact with the second surface 30B of the bottom plate 30, it is also possible to prevent foreign matter from entering the first surface 30A of the bottom plate 30 through the through hole 32 of the bottom plate 30. Moreover, since the infrared signal passing through the opening 44 of the case cover 43B is reflected on the inner peripheral surface of the peripheral wall portion 440 and received by the light receiving section 40, the range in which the infrared signal can be received can be expanded.

The entire case cover 43B may be made of a material and with a thickness that allows infrared signals to pass through. Alternatively, the peripheral wall 440 and the partition 441 of the case cover 43B may be made of a material that allows infrared signals to pass through, and the rest of the case cover 43B excluding the peripheral wall 440 and the partition 441 may be made of a material that does not allow infrared signals to pass through (see FIG. 40A).

However, the case cover 43B only needs to have the partition wall 441 capable of transmitting infrared signals, and the entire case cover 43B including the partition wall 441 may be formed of a material that does not have high transmittance for infrared signals. In this case, since unnecessary infrared signals are less likely to pass through the case cover 43B and be received by the light receiving section 40, it is possible to prevent the power supply device 20 from malfunctioning due to stray light or the like. Note that the rib 442 may not be provided on the lower surface of the case cover 43B (see FIG. 40B). Alternatively, the opening 44 may be surrounded by a sealing member such as an O-ring instead of the rib 442.

Further, the peripheral wall portion 440 of the case cover 43B may be formed so as to surround the light receiving lens 401 of the light receiving portion 40 at its upper end portion (see FIG. 41A). In this case, it becomes even more difficult for the light receiving unit 40 to receive unnecessary infrared signals, so it is possible to further suppress malfunctions of the power supply device 20 due to stray light or the like. However, the case cover 43B does not need to have the peripheral wall portion 440 (see FIG. 41B).

Alternatively, the tip portion (upper end portion) of the peripheral wall portion 440 may be formed into a tapered (truncated conical shape) (see FIG. 42). The opening diameter of the tip portion of the peripheral wall portion 440 may be larger than the lens diameter of the light receiving lens 401 of the light receiving portion 40, or may be smaller than the lens diameter. In this case, since the infrared signal is focused by the tip portion of the peripheral wall portion 440, it is possible to increase the intensity of the infrared signal received by the light receiving lens 401 and improve reception sensitivity.

In addition, in the lighting fixture A1 of modification 13, the circuit board 42 of the infrared module 4 may be housed in the power supply case 21 together with the power supply device 20. Further, the circuit board 42 may be housed in the case 43 in an upright state.

Further, in the embodiment and each modification described above, a receiving section that receives a wireless signal using radio waves as a medium may be provided instead of the light receiving section.

(4) Reference example Finally, a reference example that does not correspond to the embodiment of the present disclosure but has the same basic configuration as the lighting fixture A1 according to the embodiment will be described with reference to the drawings (FIGS. 43 to 46). do. However, the basic configuration of the lighting fixture A3 of the reference example described below is the same as the basic configuration of the lighting fixture A1 according to the embodiment. Therefore, configurations that are common and substantially common to the basic configuration of the lighting fixture A1 according to the embodiment are given the same reference numerals, and illustrations and descriptions thereof will be omitted as appropriate. Note that in the following description, "substantially common configuration" means configurations that have a common function even if they are slightly different in shape, size, etc.

The lighting fixture A3 of the reference example includes a support member 3, a light source (light source module 1), a light receiving section 40, and a cover 5 (see FIGS. 43 to 46). The support member 3 has a first surface 30A and a second surface 30B opposite to the first surface 30A. The light source module 1 is supported by the support member 3 on the first surface 30A side. The light receiving section 40 is arranged on the second surface 30B side of the support member 3. The cover 5 covers the light source module 1 from the direction (vertical direction) facing the first surface 30A. The cover 5 has an extending portion 53 that projects from the periphery of the cover 5 along the first surface 30A in a direction approaching the light source module 1. The support member 3 has a through hole 32 that penetrates from the first surface 30A to the second surface 30B. The through hole 32 is provided in a region overlapping the extension portion 53 when viewed from the direction in which the first surface 30A and the cover 5 face each other (vertical direction). Furthermore, the extending portion 53 has a hole 534 that overlaps at least a portion of the through hole 32 in the vertical direction.

Thus, in the lighting fixture A3 of the reference example, the light receiving section 40 can receive the optical signal through the hole 534 of the extension section 53 and the through hole 32 of the support member 3. Therefore, compared to the conventional example described in Patent Document 1, the lighting fixture A3 of the reference example suppresses the attenuation of the optical signal until it passes through the through hole 32 of the support member 3. It is possible to improve the

By the way, foreign objects such as insects enter the first surface 30A from the second surface 30B side of the bottom plate 30 through the through hole 32 provided in the bottom plate 30, and further enter the cover 5 through the hole 534 of the extension portion 53. There is a possibility that it will invade the space surrounded by the support member 3. Therefore, at least one of the through hole 32 and the hole 534, which is a path for foreign matter to enter, should be closed with a sheet-like member made of a material that can transmit infrared rays, for example, a tape 56 made of a synthetic resin material such as polyethylene terephthalate. is desirable.

When closing the hole 534 of the extension part 53, it is desirable that the tape 56 be attached to the upper surface of the extension part 53 (the surface facing the bottom plate 30) (see FIG. 44). However, if the visible light reflectance on the surface of the tape 56 is high, the tape 56 may be attached to the lower surface of the extending portion 53 (the surface facing the cover body 50).

Further, if there is a gap between the tip of the extending portion 53 and the bottom plate 30, it is desirable to close the through hole 32 of the bottom plate 30 with the tape 56 (see FIG. 45).

Note that the through hole 32 may be provided in the protrusion 34 of the support member 3 (see FIG. 46). In this case, the hole 534 of the extending portion 53 is provided at a position facing the protrusion 34 . It is desirable that the tape 56 be attached to the upper surface of the protrusion 34 to close the hole 534. However, the tape 56 may be attached to either the lower surface of the protrusion 34 or the upper or lower surface of the extension 53.

(5) Summary The lighting fixture (A1; A2) according to the first aspect of the present disclosure includes a support member (3), a light source (light source module 1), a light receiving section (40), a cover (5), Equipped with The support member (3) has a first surface (30A) and a second surface (30B) opposite to the first surface (30A). The light source is supported by the support member (3) on the first surface (30A) side. The light receiving section (40) is arranged on the second surface (30B) side of the support member (3). The cover (5) covers the light source from the direction facing the first surface (30A). The cover (5) has an extension (53) that protrudes from the periphery of the cover (5) along the first surface (30A) in a direction approaching the light source. The support member (3) has a through hole (32) penetrating from the first surface (30A) to the second surface (30B) in a region sandwiched by the extension portion (53). The light receiving section (40) faces the through hole (32).

The lighting fixture (A1; A2) according to the first aspect can cause the light receiving section (40) to receive an optical signal through the through hole (32) that the support member (3) has. Therefore, the lighting fixture (A1; A2) according to the first aspect suppresses the attenuation of the optical signal until it passes through the through hole (32) of the support member (3), thereby reducing the amount of light received by the light receiving portion (40). Sensitivity can be improved.

The lighting fixture (A1; A2) according to the second aspect of the present disclosure can be realized in combination with the first aspect. In the lighting fixture (A1; A2) according to the second aspect, the support member (3) includes a support part (bottom plate 30) that supports the light source, and a first surface (30A) or a support part provided around the support part. It is preferable to have a protrusion (34) protruding from the second surface (30B).

The lighting fixture (A1; A2) according to the second aspect can improve the mechanical strength of the support member (3) compared to a case where the support member (3) does not have the protrusion (34).

The lighting fixture (A1; A2) according to the third aspect of the present disclosure can be realized in combination with the second aspect. In the lighting fixture (A1; A2) according to the third aspect, it is preferable that the protrusion (34) protrudes from the first surface (30A). Preferably, the extension (53) covers at least a portion of the protrusion (34).

The lighting fixture (A1; A2) according to the third aspect allows the surface of the protrusion (34) to be subjected to treatment such as painting by covering at least a portion of the protrusion (34) with the extension (53). Since this is no longer necessary, manufacturing costs can be reduced.

The lighting device (A1; A2) according to the fourth aspect of the present disclosure can be realized by combining it with any of the first to third aspects. In the lighting device (A1; A2) according to the fourth aspect, it is preferable that the extension portion (53) is inclined in a direction approaching the first surface (30A) from the periphery of the cover (5) toward the light source.

In the lighting fixture (A1; A2) according to the fourth aspect, since the extending portion (53) is inclined in a direction from the periphery of the cover (5) toward the light source toward the first surface (30A), radiation from the light source is By reflecting the light from the surface of the extending portion (53), it is possible to improve the light extraction efficiency.

The lighting fixture (A1; A2) according to the fifth aspect of the present disclosure can be realized in combination with any one of the first to fourth aspects. In the lighting fixture (A1; A2) according to the fifth aspect, it is preferable that at least a portion of the extending portion (53) be in contact with the first surface (30A).

In the lighting fixture (A1; A2) according to the fifth aspect, since at least a part (side piece 532) of the extension part (53) is in contact with the first surface (30A), some external force is applied to the cover (5). When this is applied, excessive deformation of the extending portion (53) can be suppressed.

The lighting fixture (A1; A2) according to the sixth aspect of the present disclosure can be realized in combination with any one of the first to fifth aspects. It is preferable that the lighting fixture (A1; A2) according to the sixth aspect further includes a case (43) that accommodates the light receiving section (40). It is preferable that the case (43) has an opening (44) at a position facing the through hole (32).

The lighting fixture (A1; A2) according to the sixth aspect can reduce the possibility that the light receiving unit (40) mistakenly receives an optical signal transmitted to another lighting fixture.

The lighting fixture (A1; A2) according to the seventh aspect of the present disclosure can be realized in combination with the sixth aspect. The lighting fixture (A1; A2) according to the seventh aspect further includes a power supply device (20) that supplies power to the light source to light the light source, and a power supply case (21) that houses the power supply device (20). is preferred. The case (43) is preferably attached to the power supply case (21).

The lighting fixture (A1; A2) according to the seventh aspect does not require a structure for attaching the case (43) to the support member (3), so it is possible to reduce the number of parts and the assembly process. .

The lighting fixture (A1; A2) according to the eighth aspect of the present disclosure can be realized in combination with the sixth aspect. In the lighting fixture (A1; A2) according to the eighth aspect, the case (43) is preferably attached to the support member (3).

In the lighting fixture (A1; A2) according to the eighth aspect, by attaching the case (43) to the support member (3), the degree of freedom in the installation location of the light receiving section (40) can be increased.

The lighting fixture (A1; A2) according to the ninth aspect of the present disclosure can be realized in combination with any one of the first to eighth aspects. The lighting fixture (A1; A2) according to the ninth aspect further includes a power supply device (20) that supplies power to the light source to light the light source, and a power supply case (21) that houses the power supply device (20). is preferred. It is preferable that the light receiving section (40) is housed in the power supply case (21).

The lighting fixture (A1; A2) according to the ninth aspect can reduce the number of parts and the assembly process by housing the light receiving section (40) in the power supply case (21).

The lighting fixture (A1; A2) according to the tenth aspect of the present disclosure can be realized in combination with any one of the first to ninth aspects. It is preferable that the lighting fixture (A1; A2) according to the tenth aspect further includes a power supply device (20) that supplies power to the light source and lights it up. It is preferable that the power supply device (20) adjusts the supply of power to the light source according to the optical signal received by the light receiving section (40).

The lighting fixture (A1; A2) according to the tenth aspect can remotely control the power supply device (20) using an optical signal received by the light receiving section (40).

The lighting fixture (A1; A2) according to the eleventh aspect of the present disclosure can be realized in combination with the tenth aspect. In the lighting fixture (A1; A2) according to the eleventh aspect, it is preferable that the optical signal uses infrared light as a medium.

The lighting device (A1; A2) according to the eleventh aspect receives an optical signal using infrared light (infrared rays) as a medium at the light receiving unit (40), and therefore can improve the reception accuracy of the optical signal at the light receiving unit (40) compared to when visible light is used as a medium.

The light source unit (B1; B2) according to the twelfth aspect of the present disclosure is used in the lighting fixture (A1; A2) according to any one of the first to eleventh aspects. The light source unit (B1; B2) according to the twelfth aspect includes a support member (3), a light source (light source module 1), a light receiving unit (40), and a cover (5). The light source unit (B1; B2) according to the twelfth aspect is detachably attached to the fixture body (6) that is attached to the construction material.

The light source unit (B1; B2) according to the twelfth aspect improves the light receiving sensitivity in the light receiving section (40) by suppressing the attenuation of the optical signal until it passes through the through hole (32) of the support member (3). You can improve your performance.

A1; A2 Lighting equipment B1; B2 Light source unit 1 Light source module (light source)
3 Support member 5 Cover 6 Apparatus main body 20 Power supply device 21 Power supply case 30A First surface 30B Second surface 32 Through hole 34 Projection 40 Light receiving section 43 Case 44 Opening 53 Extension 532 Side piece

Claims (12)

a support member having a first surface and a second surface opposite to the first surface;
a light source supported by the support member on the first surface side;
a light receiving section disposed on the second surface side of the support member;
a cover that covers the light source from a direction facing the first surface;
Equipped with
The cover has an extension portion that protrudes from the periphery of the cover along the first surface in a direction approaching the light source,
The support member has a through hole penetrating from the first surface to the second surface in a region sandwiched by the extension part,
the light receiving section faces the through hole;
lighting equipment. The support member is
a support part that supports the light source;
a protrusion provided around the support portion and protruding from the first surface or the second surface;
has,
The lighting fixture according to claim 1. The protrusion protrudes from the first surface,
The extension portion covers at least a portion of the protrusion.
The lighting fixture according to claim 2. The extending portion is inclined from the periphery of the cover toward the light source in a direction approaching the first surface.
The lighting fixture according to any one of claims 1 to 3. at least a portion of the extending portion is in contact with the first surface;
The lighting fixture according to any one of claims 1 to 3. further comprising a case accommodating the light receiving section,
The case has an opening at a position facing the through hole.
The lighting fixture according to any one of claims 1 to 3. a power supply device that supplies power to the light source and lights it;
a power supply case that houses the power supply device;
further comprising;
the case is attached to the power supply case;
The lighting fixture according to claim 6. The case is attached to the support member.
7. A lighting device according to claim 6. a power supply device that supplies power to the light source and lights it;
a power supply case that houses the power supply device;
further comprising;
The light receiving unit is housed in the power supply case.
The lighting fixture according to any one of claims 1 to 3. Further comprising a power supply device that supplies power to the light source to light the light source,
The power supply device adjusts the supply of the power to the light source according to the optical signal received by the light receiving section.
The lighting fixture according to any one of claims 1 to 3. the optical signal uses infrared light as a medium;
The lighting fixture according to claim 10. A light source unit used in the lighting fixture according to any one of claims 1 to 3,
comprising the support member, the light source, the light receiving section, and the cover,
It is removably attached to the main body of the equipment that is attached to the construction material.
light source unit.

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