Lighting device

Abstract

To restrain a lens of an optical sensor from being scratched.SOLUTION: An illuminating device comprises a light source, an optical sensor 71, a power source, and a case 8. The optical sensor 71 comprises a lens 712 protruding to a side of an illumination space. The case 8 houses the optical sensor 71 while the lens 712 is exposed to the side of the illumination space via an opening part 811. The case 8 comprises a wall part 812 in at least a portion in an opening end edge of the opening part 811. The lens 712 includes a first portion 7121 located closer to the side of the illumination space than an end surface in the wall part 812 on the side of the illumination space, and a second portion 7122 located closer to a side opposite to the side of the illumination space than the end surface of the wall part 812. The optical sensor 71 also comprises a non-lens part (holding part 713). Unlike the lens 712, the non-lens part is opposed to the wall part 812 in a second direction while the optical sensor 71 is housed in the case 8.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure generally relates to lighting devices, and more particularly to lighting devices provided with optical sensors.

Background Art

[0002] Patent Document 1 describes a lighting device including a light source unit, a lighting device (power supply), and a sensor unit. The sensor unit includes a module including a sensor (optical sensor) and a housing (case) for housing the module. The module is housed in the housing with the entire lens portion of the sensor exposed to the outside.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the lighting device described in Patent Document 1, as described above, since the entire lens portion of the sensor is exposed to the outside, for example, the lens portion may be damaged during transportation or construction of the lighting device.

[0005] An object of the present disclosure is to provide a lighting device capable of suppressing damage to the lens of an optical sensor.

Means for Solving the Problems

[0006] Book Disclosure oneThe illumination device according to this embodiment comprises a light source, an optical sensor, a power supply, and a case. The light source irradiates light into the illumination space. The optical sensor has a lens that protrudes toward the illumination space. The power supply supplies ignition power to the light source according to the detection result of the optical sensor. The case has an opening and houses the optical sensor with the lens exposed toward the illumination space through the opening. The case has a wall portion at least part of the opening edge of the opening. The lens, when the optical sensor is housed in the case, includes a first portion and a second portion. The first portion is located toward the illumination space side of the end face of the wall portion toward the illumination space side. The second portion is located toward the opposite side of the wall portion toward the illumination space side of the end face of the wall portion. The optical sensor further has a non-lens portion. Unlike the lens, the non-lens portion faces the protruding wall portion in a second direction that intersects with the first direction which is the protruding direction of the lens when the optical sensor is housed in the case. The wall portion is formed in a cylindrical shape over the entire circumference of the opening edge of the opening in a plan view from the first direction. The wall portion has an inner circumferential surface facing the non-lens portion in the second direction, a first end surface which is the end surface on the illumination space side in the first direction, and a second end surface which is the end surface on the opposite side from the illumination space side in the first direction. The inner circumferential surface is inclined such that the thickness of the wall portion decreases from the second end surface toward the first end surface in the first direction. A lighting device according to another aspect of the present disclosure comprises a light source, an optical sensor, a power supply, and a case. The light source irradiates light into a lighting space. The optical sensor has a lens protruding toward the lighting space. The power supply supplies ignition power to the light source according to the detection result of the optical sensor. The case has an opening and houses the optical sensor with the lens exposed toward the lighting space through the opening. The case has a wall portion at least part of the opening edge of the opening. The lens, when the optical sensor is housed in the case, includes a first portion and a second portion. The first portion is located toward the lighting space side of the end face of the wall portion toward the lighting space. The second portion is located toward the opposite side of the wall portion toward the lighting space side of the end face of the wall portion. The optical sensor further has a non-lens portion. Unlike the lens, the non-lens portion faces the protruding wall portion in a second direction that intersects with a first direction which is the protruding direction of the lens when the optical sensor is housed in the case. When the optical sensor is housed in the case, a gap is provided between the wall portion and the non-lens portion in the second direction. [Effects of the Invention]

[0007] According to one aspect of the present disclosure, the illumination device makes it possible to prevent scratches on the lens of the optical sensor. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view of a lighting device according to an embodiment. [Figure 2] Figure 2 is an exploded perspective view of the same lighting device. [Figure 3] Figure 3 is a front view of the sensor unit included in the same lighting device. [Figure 4] Figure 4 is an exploded perspective view of the same sensor unit as shown above, viewed from below. [Figure 5] Figure 5 is an exploded perspective view of the same sensor unit as shown above, seen from above. [Figure 6]Figure 6 is a cross-sectional view of the same sensor unit. [Figure 7] Figure 7 is a cross-sectional view of the main part of the sensor unit shown above. [Figure 8] Figure 8 is a cross-sectional view of the main part of the sensor unit of the lighting device according to the modified embodiment 1. [Figure 9] Figure 9 is a cross-sectional view of the main part of the sensor unit of the lighting device according to a modified example 2 of the embodiment. [Figure 10] Figure 10 is a cross-sectional view of the main part of the sensor unit of the lighting device according to the modified embodiment 3. [Modes for carrying out the invention]

[0009] (Embodiment) The lighting device according to the embodiment will be described below with reference to the drawings. The figures described in the embodiments below are schematic diagrams, and the ratios of the size and thickness of each component do not necessarily reflect the actual dimensional ratios. Furthermore, the configuration described in the embodiments below is merely one example of this disclosure. This disclosure is not limited to the embodiments below, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0010] (1) Overview First, an overview of the lighting device A1 according to this embodiment will be described with reference to Figures 1 to 5.

[0011] As shown in Figures 1 and 2, the lighting device A1 according to this embodiment comprises a light source unit B1, a sensor unit C1, and a device body 5. In the lighting device A1 according to this embodiment, the light source unit B1 and the sensor unit C1 are detachably attached to the device body 5, which is, for example, directly attached to the ceiling of the facility. The device body 5 may also be embedded in the ceiling of the facility. Alternatively, the device body 5 may be directly attached to or embedded in the wall of the facility.

[0012] The facility is, for example, a building with high ceilings, such as a logistics warehouse or a factory. In this embodiment, the case where the facility is a logistics warehouse will be used as an example. However, the facility is not limited to buildings with high ceilings as described above; for example, it may be a non-residential building such as an office building or a hospital, or it may be a residential building such as a detached house or an individual dwelling unit in an apartment building. In other words, the facility may be a building with low ceilings.

[0013] The illumination device A1 according to this embodiment comprises a light source (light-emitting element 11), an optical sensor 71, a power supply (power supply device 2), and a case 8. The light source irradiates light into the illumination space LS1. The optical sensor 71 has a lens 712 that protrudes toward the illumination space LS1. The power supply supplies ignition power to the light source according to the detection result of the optical sensor 71. The case 8 has an opening 811 and houses the optical sensor 71 with the lens 712 exposed toward the illumination space LS1 through the opening 811. The case 8 has a wall portion 812 at least a part of the opening edge of the opening 811. The lens 712 includes a first portion 7121 (see Figure 6) and a second portion 7122 (see Figure 6). The first portion 7121 is the portion located toward the illumination space LS1 than the end face (first end face 814) of the wall portion 812 toward the illumination space LS1 when the optical sensor 71 is housed in the case 8. The second part 7122 is the portion of the wall portion 812 located on the opposite side of the illumination space LS1 from the end face of the wall portion 812 when the optical sensor 71 is housed in the case 8. The optical sensor 71 further has a non-lens portion (holding portion) 713. Unlike the lens 712, the non-lens portion 713 faces the wall portion 812 in a second direction (for example, the front-to-back direction) when the optical sensor 71 is housed in the case 8. The second direction intersects (is perpendicular to) the first direction (for example, the up-and-down direction), which is the protruding direction of the lens 712. Here, the illumination space LS1 is the space illuminated by light emitted from the illumination device A1, and is located below the illumination device A1 (see Figure 1).

[0014] In the lighting device A1 according to the embodiment, as described above, the first portion 7121 of the lens 712 is located on the lighting space LS1 side with respect to the upper end surface (first end surface 814) of the wall portion 812, and the second portion 7122 of the lens 712 is located on the side opposite to the lighting space LS1 side with respect to the upper end surface of the wall portion 812. That is, in the lighting device A1 according to the embodiment, the second portion 7122 of the lens 712 is protected by the wall portion 812, and it is possible to suppress the lens 712 from being damaged as compared with the case where the entire lens is exposed to the outside. Thereby, it is possible to suppress a decrease in the detection accuracy of the optical sensor 71. Further, since only the first portion 7121 of the lens 712 is exposed to the outside, there is an advantage that it is easier to handle than a structure in which the entire lens is exposed to the outside. [[ID=@1]]

[0015] (2) Details Next, the details of the lighting device A1 according to the embodiment will be described with reference to FIGS. 1 to 7. In the following description, unless otherwise specified, the up-down, front-back, and left-right directions indicated by arrows in FIGS. 1 to 7 are defined as the up-down, front-back, and left-right directions of the lighting device A1, the light source unit B1, and the sensor unit C1, respectively. However, these directions are not intended to limit the directions during use of the lighting device A1, the light source unit B1, and the sensor unit C1. Also, the arrows indicating "front", "back", "left", "right", "up", and "down" in the drawings are merely for explanation and do not have any physical entity.

[0016] As shown in FIGS. 1 and 2, the lighting device A1 according to the embodiment includes a light source unit B1, a sensor unit C1, and a device body 5.

[0017] (2.1) Device body As shown in FIG. 2, the device body 5 includes a housing portion 51, a pair of reflecting plates 52, and a pair of end plates 53. The housing portion 51 has an open bottom surface and is in the shape of a rectangular box that is long in the front-back direction. The pair of reflecting plates 52 project obliquely upward from the open end edges on both sides in the short-side direction (left-right direction) of the housing portion 51. The pair of end plates 53 are provided at both ends in the longitudinal direction (front-back direction) of the housing portion 51 and the pair of reflecting plates 52.

[0018] The main body of the device 5 is attached to the ceiling by inserting suspension bolts through at least two of the multiple mounting holes 54 provided on the bottom surface of the housing 51, and tightening nuts onto these suspension bolts. In addition, a power wire is inserted through one of the multiple power supply holes 55 provided on the bottom surface of the housing 51 of the main body of the device 5. The power wire inserted through the power supply hole 55 is electrically connected to a terminal block 56 attached to the inner bottom surface of the housing 51. Three wires 57 are drawn out from the terminal block 56, and a single male power connector 58 is connected to the end of each of these three wires 57.

[0019] (2.2) Light source unit As shown in Figure 2, the light source unit B1 comprises a light source module 1, a power supply unit 2, a mounting plate 3, and a first cover 4.

[0020] (2.2.1) Light source module The light source module 1 comprises a plurality of light-emitting elements 11 and a substrate 12. Each of the plurality of light-emitting elements 11 is, for example, a packaged white LED (Light Emitting Diode) for illumination. The plurality of light-emitting elements 11 are light sources that irradiate light into the illumination space LS1 (see Figure 1) located below the illumination device A1. Note that the light-emitting elements 11 are not limited to LEDs, but may be, for example, organic electroluminescent elements or semiconductor laser elements.

[0021] The substrate 12 is formed in a long rectangular shape along the front-to-back direction. Multiple light-emitting elements 11 are mounted in a single row at equal intervals along the longitudinal direction (front-to-back direction) of the substrate 12, in the center of the short-side direction (left-to-right direction) on the surface (bottom surface) of the substrate 12 (see Figure 2). The multiple light-emitting elements 11 are electrically connected in series or parallel by printed wiring formed on the surface of the substrate 12. Note that the substrate 12 may be constructed by connecting multiple substrates in the longitudinal direction.

[0022] (2.2.2) Mounting plate The mounting plate 3 is formed from a metal plate into a rectangular trough shape that is elongated in the front-to-back direction. The mounting plate 3 has a bottom plate 31 and a pair of side plates 32. The bottom plate 31 is a rectangular shape that is elongated in the front-to-back direction. The pair of side plates 32 rise upward from both ends of the bottom plate 31 in the shorter direction (left-to-right direction).

[0023] The mounting plate 3 has a plurality of claws 311 and a pair of through holes 312. The plurality of claws 311 are cut out from the base plate 31 and are arranged in two rows at equal intervals along the longitudinal direction (front-to-back direction) of the base plate 31. The pair of through holes 312 are provided on both the left and right sides of one end (front end) in the longitudinal direction of the base plate 31.

[0024] The light source module 1 described above is attached to the surface (bottom surface) of the base plate 31 by a plurality of claws 311. The width of the base plate 31 in the short direction (left-right direction) is greater than the width of the substrate 12 in the short direction (see Figure 2). Also, the length of the base plate 31 in the long direction (front-back direction) is longer than the length of the substrate 12 in the long direction.

[0025] (2.2.3) Cover 1 The first cover 4 is formed in a semi-cylindrical shape from a translucent synthetic resin, such as acrylic resin or polycarbonate resin. Specifically, the first cover 4 has a convex lens-shaped main portion 41 such that the amount of downward projection increases from both ends towards the center in the short direction (left-right direction). The first cover 4 also has a pair of protruding walls 42 at both ends of the main portion 41 in the short direction, projecting upward along the longitudinal direction (front-back direction) of the main portion 41.

[0026] The first cover 4 houses the mounting plate 3 between a pair of protruding walls 42, and is attached to the mounting plate 3 by hooking the hooks formed on the tips (upper ends) of the pair of protruding walls 42 onto the tips (upper ends) of the pair of side plates 32 of the mounting plate 3.

[0027] (2.2.4) Power supply As shown in Figure 2, the power supply unit 2 includes a lighting circuit 21 and a power supply case 22 that houses the lighting circuit 21. The lighting circuit 21 is composed of a printed circuit board 23 with various electronic components, including an integrated circuit, and a female power connector 24 mounted on it. The power connector 58 on the device body 5 side is electrically and mechanically connected to the power connector 24.

[0028] The power supply case 22 is formed from a metal plate into a rectangular box shape with one side (bottom) open. The power supply case 22 houses the lighting circuit 21 and is fixed to the mounting plate 3 with its opening facing the back surface (top surface) of the bottom plate 31. When the power supply case 22 is fixed to the mounting plate 3, it is electrically connected to the mounting plate 3. Furthermore, when the light source unit B1 is attached to the device body 5, the mounting plate 3 is electrically connected to the device body 5. In other words, the power supply case 22 of the power supply unit 2 is electrically connected to the device body 5 through the mounting plate 3.

[0029] The power supply unit 2, when the optical sensor 71 (described later) is active based on the remote control signal received by the remote control receiver 72 (described later), supplies ignition power to the light source module 1 according to the detection result of the optical sensor 71. More specifically, the power supply unit 2 supplies ignition power to the light source module 1 when the optical sensor 71 detects a person present in the illuminated space LS1. Furthermore, the power supply unit 2 stops supplying ignition power to the light source module 1 after the optical sensor 71 has stopped detecting the person and the operation hold time (described later) has elapsed. In other words, the power supply unit 2 is a power source that supplies ignition power to the light-emitting element (light source) 11 according to the detection result of the optical sensor 71.

[0030] (2.3) Sensor Unit As shown in Figures 3 to 5, the sensor unit C1 comprises a second cover 6, a sensor module 7, a case 8, a base 9, a support frame 10, and a plurality (three in the illustrated example) protective members 13.

[0031] (2.3.1) Cover 2 As shown in Figures 3 to 5, the second cover 6 has a main portion 61, an end portion 62, and a protruding piece 63. The second cover 6 is made of a synthetic resin that does not transmit light.

[0032] The main portion 61 has the same curved shape as the main portion 41 of the first cover 4 described above. The length of the main portion 61 in the front-rear direction is shorter than the length of the main portion 41 in the front-rear direction. The end portion 62 closes one end (front end) of the main portion 61. The protruding piece 63 protrudes rearward from the periphery of the other end (rear end) of the main portion 61.

[0033] The second cover 6 further has a pair of ribs 64. The pair of ribs 64 are provided near both ends of the protruding piece 63 at the other end of the main portion 61. Each of the pair of ribs 64 protrudes parallel to the protruding piece 63.

[0034] The second cover 6 further comprises a pair of protruding walls 65. Each of the pair of protruding walls 65 is integrally formed with the main portion 61 on its back surface (top surface) and protrudes upward from the back surface of the main portion 61. Each of the pair of protruding walls 65 has a through hole 651. Each through hole 651 is an elongated hole that runs along the front-rear direction and penetrates the protruding wall 65 in its thickness direction.

[0035] The second cover 6 is attached to the mounting plate 3 by inserting stepped screws, which are inserted through holes 651 provided in each of the pair of protruding walls 65 and through holes provided in each of the pair of side plates 32 of the mounting plate 3, into screw holes 931 provided in each of the pair of protrusions 93 of the base 9, which will be described later. When the first cover 4 and the second cover 6 are attached to the mounting plate 3, the protruding piece 63 and the pair of ribs 64 of the second cover 6 are inserted into the end of the first cover 4 on the side of the second cover 6. As a result, the main part 41 of the first cover 4 and the main part 61 of the second cover 6 become flush.

[0036] (2.3.2) Sensor Module As shown in Figures 4 and 5, the sensor module 7 includes an optical sensor 71, a remote control light receiving unit 72, a circuit board 73, and a connector 74.

[0037] The optical sensor 71 is, for example, a pyroelectric infrared sensor. That is, the optical sensor 71 is a human presence sensor that detects a person present in the illuminated space LS1 (see Figure 1) by detecting infrared radiation emitted from the human body with a pyroelectric element. When the optical sensor 71 detects the presence of a person, it outputs a human body detection signal. As shown in Figure 6, the optical sensor 71 has a sensor unit 711, a lens 712, and a holding unit 713.

[0038] The sensor unit 711 includes the pyroelectric element described above. In other words, the sensor unit 711 is a detection unit that detects a person by detecting infrared radiation emitted from the human body. The sensor unit 711 is mounted on the surface (bottom surface) of the substrate 73 via a plurality of lead terminals 7111.

[0039] As shown in Figure 6, the lens 712 is located in front of (below) the sensor unit 711. The lens 712 is a focusing lens for concentrating infrared light incident from the outside (on the illumination space LS1 side) onto the sensor unit 711. More specifically, the lens 712 is a so-called small multi-lens with a dome shape that protrudes in the vertical direction toward the illumination space LS1 side (downward side). That is, the optical sensor 71 has a lens 712 that protrudes toward the illumination space LS1 side. Multiple convex portions that are convex upward are formed on the back surface (top surface) of the lens 712. In this embodiment, the vertical direction is the first direction.

[0040] As shown in Figure 6, the lens 712 includes a first portion 7121 and a second portion 7122. The first portion 7121 is the part of the lens 712 located on the side of the illumination space LS1 (below) the first end face 814 on the illumination space LS1 side of the wall portion 812 of the case 8, which will be described later. The second portion 7122 is the part of the lens 712 located on the side of the first end face 814 on the wall portion 812 that is opposite to the illumination space LS1 side (above). In other words, in this embodiment, only the first portion 7121 of the lens 712 is exposed from the wall portion 812 of the case 8.

[0041] The holding portion 713 includes a first holder 714 and a second holder 715. The first holder 714 is formed in a cylindrical shape with both ends open in the vertical direction, and the sensor portion 711 described above is housed inside it. The second holder 715 is formed in an annular shape with both ends open in the vertical direction, and is integrally formed with the lens 712 at one end (upper end) of the lens 712. Then, with the sensor portion 711 housed inside the first holder 714, the second holder 715 is assembled to the first holder 714, thereby integrating the sensor portion 711 and the lens 712 via the first holder 714 and the second holder 715.

[0042] Furthermore, as shown in Figure 7, the second retainer 715 has a projection 716. The projection 716 protrudes in a direction perpendicular to the vertical direction (a direction parallel to a plane including the front-rear and left-right directions). The projection 716 is formed over substantially the entire circumference of the second retainer 715. In the vertical direction, the projection 716 faces the second end face 815 (described later) of the wall portion 812. Note that the projection 716 does not necessarily have to be formed over the entire circumference of the second retainer 715; for example, it may be formed on a part of the circumferential direction of the second retainer 715.

[0043] The remote control receiver 72 is an infrared remote control receiver module that houses a photodiode, amplifier, filter, etc., in a single package. The remote control receiver 72 receives remote control signals (remote control signals) that use infrared light as the communication medium. The remote control signals are transmitted from the remote controller. The remote control signals include setting information for setting the operation of the optical sensor 71. The setting information includes, for example, the operation hold time of the optical sensor 71, whether the optical sensor 71 is enabled or disabled, and information regarding dimming of the light source module 1. The operation hold time is the time from when the optical sensor 71 stops detecting the presence of a person until it continues to output a human body detection signal. As shown in Figure 6, the remote control receiver 72 is mounted on the surface (bottom surface) of the substrate 73. That is, the optical sensor 71 and the remote control receiver 72 are mounted on the same surface (bottom surface) of the substrate 73. Also, the optical sensor 71 and the remote control receiver 72 are arranged in the front-to-back direction, with the remote control receiver 72 at the front and the optical sensor 71 at the rear.

[0044] A connector 74 is mounted on the back (top) side of the circuit board 73. That is, the connector 74 is mounted on a different side (top) of the circuit board 73 from the optical sensor 71 and the remote control light receiver 72. As shown in Figure 6, a cable 741 containing multiple wires is connected to the connector 74. The multiple wires include a power supply wire for supplying power to the optical sensor 71 and an output wire for outputting a human body detection signal from the optical sensor 71.

[0045] Furthermore, a signal processing circuit is mounted on the surface (bottom surface) of the substrate 73. The signal processing circuit processes the output of the optical sensor 71 and outputs a human body detection signal. The signal processing circuit continues to output the human body detection signal from the time the optical sensor 71 stops detecting the presence of a person until the aforementioned operation hold time has elapsed. Also, if the optical sensor 71 does not detect the presence of a person before the operation hold time has elapsed, the signal processing circuit stops outputting the human body detection signal, and if the optical sensor 71 detects the presence of a person again before the operation hold time has elapsed, it continues to output the human body detection signal.

[0046] (2.3.3) Case Case 8 is a rectangular box-shaped synthetic resin molded body with one side (top) open. Case 8 is configured to house and hold the sensor module 7 described above. A stepped portion 80 is formed around the entire circumference of the outer surface of Case 8. The bottom wall 81 of Case 8 is provided with an opening 811 and a window hole 816. The opening 811 is for exposing the lens 712 of the optical sensor 71 to the illumination space LS1 side. The window hole 816 is for passing remote control signals from the remote controller. The diameter of the opening 811 is larger than the diameter of the window hole 816 (see Figure 3). The opening 811 and the window hole 816 are arranged in the front-to-back direction, with the window hole 816 at the front and the opening 811 at the rear. Such a case 8 houses the optical sensor 71 with the lens 712 exposed to the illumination space LS1 side through the opening 811. Furthermore, since insects and other creatures may enter the case 8 if the window opening 816 remains open, it is preferable that an insect-proof seal be attached to the back (top) side of the bottom wall 81 to cover the window opening 816.

[0047] Furthermore, a wall portion 812 projecting vertically is integrally formed on the opening edge of the opening 811. That is, the case 8 has a wall portion 812 on at least a part of the opening edge of the opening 811. In this embodiment, the wall portion 812 is formed in a cylindrical shape around the entire circumference of the opening edge of the opening 811 when viewed from above. Also, in this embodiment, the wall portion 812 is a protruding wall portion that projects both downwards, which is on the side of the lighting space LS1, and upwards, which is on the opposite side of the lighting space LS1, in the vertical direction (first direction).

[0048] The wall portion 812 has an inner circumferential surface 813, a first end surface 814, and a second end surface 815. The inner circumferential surface 813 is the inner circumferential surface of the wall portion 812, and when the optical sensor 71 is housed in the case 8, it faces the second holder 715 of the holding portion 713 in the front-rear direction, as shown in Figure 6. The first end surface 814 is the end surface on the illumination space LS1 side (lower side) of the two vertical end surfaces of the wall portion 812. The second end surface 815 is the end surface on the opposite side from the illumination space LS1 side (upper side) of the two vertical end surfaces of the wall portion 812.

[0049] Of the side walls of case 8 from the stepped portion 80 to the bottom wall 81, each of the pair of side walls 82 facing each other in the shorter direction (left-right direction) is formed in a semi-cylindrical shape that is convex inward. In addition, four hook portions 83 are provided on both the left and right sides near the opening end of case 8. Each of the four hook portions 83 is rectangular in shape when viewed from above. Case 8 is attached to the base 9 by inserting the four hook portions 83 into the gaps between the main portion 91 and the four protruding pieces 92, and is attached to the mounting plate 3 via the base 9.

[0050] Here, case 8 further has a partition wall 84. The partition wall 84 divides the internal space of case 8 into two spaces (first space S1 and second space S2) in the front-to-back direction. The first space S1 is a space for housing the sensor module 7. The second space S2 is a space for housing the remote control receiver 72. The first space S1 is larger than the second space S2. The partition wall 84 protrudes upward from the back surface (top surface) of the bottom wall 81. This partition wall 84 makes it possible to suppress infrared rays entering the first space S1 through the opening 811 from entering the second space S2. In other words, the remote control receiver 72 is able to receive only remote control signals entering through the window hole 816. This makes it possible to improve the reception accuracy of the remote control receiver 72 compared to when there is no partition wall inside the case.

[0051] (2.3.4) Pedestal As shown in Figures 4 and 5, the base 9 is integrally formed as a synthetic resin molded body, comprising a rectangular plate-shaped main part 91 and a pair of rectangular tubular projections 93 that protrude upward from both the left and right sides of the main part 91. Each of the pair of projections 93 has a screw hole 931 that penetrates in the left-right direction. In addition, L-shaped projections 92 protrude downward from the four corners of one side (bottom surface) of the main part 91.

[0052] The base 9 is attached to the mounting plate 3 by inserting a pair of projections 93 through a pair of through holes 312 (see Figure 2) provided in the bottom plate 31 of the mounting plate 3, and then inserting stepped screws, which are inserted through holes provided in a pair of side plates 32 of the mounting plate 3, into a pair of screw holes 931.

[0053] (2.3.5) Support frame The support frame 10 is formed from a synthetic resin material into a rectangular frame shape with dimensions that fit inside the case 8. The support frame 10 is then fitted inside the case 8 so as to face the substrate 73 of the sensor module 7 held in the case 8. In other words, the support frame 10 is configured to support the substrate 73 of the sensor module 7 within the case 8 (see Figure 6).

[0054] (2.3.6) Protective components As shown in Figures 4 and 5, the protective member 13 includes a first protective member 131 and a pair of second protective members 132. The first protective member 131 is formed in the shape of a long rod along the left-right direction and is positioned in front of the base 9. The pair of second protective members 132 are formed in the shape of a long rod along the front-rear direction and are positioned on both the left and right sides of the support frame 10. The first protective member 131 and the pair of second protective members 132 prevent foreign matter (e.g., dust, dirt, moisture, insects, etc.) from entering the sensor module 7 side (bottom side) from the mounting plate 3 side (upper side) when the sensor unit C1 is mounted on the mounting plate 3.

[0055] (3) Details of the sensor unit Next, the details of the sensor unit C1 will be explained with reference to Figures 6 and 7.

[0056] As described above, the optical sensor 71 of the sensor unit C1 is housed in the first space S1 of the case 8 with its lens 712 exposed to the illumination space LS1 side through the opening 811 of the case 8. The remote control light receiving unit 72 of the sensor unit C1 is housed in the second space S2 of the case 8, as described above, so as to face the window opening 816 of the case 8 in the vertical direction. A partition wall 84 is provided between the first space S1 and the second space S2. Therefore, this partition wall 84 makes it possible to suppress infrared rays that enter the first space S1 through the opening 811 from entering the second space S2.

[0057] Furthermore, in the sensor unit C1, with the optical sensor 71 housed in the case 8, the first portion 7121 of the lens 712 is located on the illumination space LS1 side of the first end face 814 of the wall portion 812, and the second portion 7122 of the lens 712 is located on the opposite side of the illumination space LS1 side of the first end face 814 of the wall portion 812. In other words, in the sensor unit C1, only the first portion 7121 of the lens 712 protrudes outward from the wall portion 812 of the case 8. Therefore, it is possible to suppress scratches on the lens 712 compared to when the entire lens is exposed.

[0058] Furthermore, in the sensor unit C1, as shown in Figure 6, the inner circumferential surface 813 of the wall portion 812 and the second holder 715 of the holding portion 713 face each other in the front-rear direction. Therefore, for example, if the optical sensor 71 shakes in the front-rear direction due to vibration, the wall portion 812 and the second holder 715 will come into contact, but the lens 712 will not, thus preventing scratches on the lens 712. In other words, in this embodiment, the holding portion 713 is a non-lens portion. In short, unlike the lens 712, the holding portion 713, as a non-lens portion, faces the wall portion 812 in a second direction that intersects (is perpendicular to) the first direction, which is the protruding direction of the lens 712, when the optical sensor 71 is housed in the case 8. In this embodiment, the first direction is the vertical direction, and the second direction is the front-rear direction. Also, in this embodiment, the non-lens portion 713 is a holding portion 713 that holds the sensor portion (detection portion) 711 and the lens 712.

[0059] Furthermore, in the sensor unit C1, with the optical sensor 71 housed in the case 8, the gap G1 (see Figure 7) between the wall portion 812 and the lens 712 in a plan view from the vertical direction (first direction) is such that, as shown in Figure 6, the test finger F1 does not come into contact with the second portion 7122 of the lens 712. Here, the test finger F1 is, for example, a dummy finger as defined in Appendix 4, 1(2)c of the Japanese Electrical Appliances and Materials Safety Act. By making the gap G1 between the wall portion 812 and the lens 712 such that the test finger F1 does not come into contact with it, it is possible to ensure a distance from the sensor portion 711, which is a live part, and thereby reduce the possibility of electric shock.

[0060] Furthermore, in the sensor unit C1, when the optical sensor 71 is housed in the case 8, a gap G2 is provided between the wall portion 812 and the holding portion (non-lens portion) 713 in the front-to-back direction (second direction), as shown in Figure 7. This makes it possible to suppress the holding portion 713 from contacting the wall portion 812 even when the optical sensor 71 swings in the front-to-back direction relative to the case 8. As a result, it is possible to suppress displacement of the optical sensor 71 due to the force applied to the optical sensor 71 from the wall portion 812.

[0061] Furthermore, in the sensor unit C1, as described above, the second holder 715 of the holding portion 713 has a protruding portion 716. The protruding portion 716 faces the second end face 815 of the wall portion 812 in the vertical direction (first direction). Therefore, even if, for example, the optical sensor 71 detaches from the substrate 73 and falls, or if the entire substrate 73 including the optical sensor 71 falls, the protruding portion 716 contacts the second end face 815 of the wall portion 812, thereby preventing further falling.

[0062] Here, as described above, the lighting device A1 according to the embodiment is a lighting device installed on the ceiling of a building with a high ceiling, such as a logistics warehouse. For this reason, in lighting device A1, it is prioritized to widen the detection range of the optical sensor 71 in the vertical direction (up and down direction) rather than the detection range of the optical sensor 71 in the horizontal direction (directions parallel to the plane, including the front-to-back and left-to-right directions). In lighting device A1 according to the embodiment, as described above, the area around the lens 712 is covered with a wall portion 812, protecting a part of the lens 712 (second portion 7122), so it is possible to make the thickness of the lens 712 thinner. This makes it possible to widen the detection range of the optical sensor 71 in the vertical direction.

[0063] (4) Effects In the illumination device A1 according to this embodiment, the first portion 7121 of the lens 712 is located closer to the illumination space LS1 than the first end face 814 of the wall portion 812 on the illumination space LS1 side, and the second portion 7122 of the lens 712 is located on the opposite side of the first end face 814 of the wall portion 812 from the illumination space LS1 side. That is, in the illumination device A1 according to this embodiment, the second portion 7122 of the lens 712 is protected by the wall portion 812, which makes it possible to suppress scratches on the lens 712 compared to a case where the entire lens is exposed to the outside. This makes it possible to suppress a decrease in the detection accuracy of the optical sensor 71. Furthermore, since only the first portion 7121 of the lens 712 is exposed to the outside, there is an advantage in that it is easier to handle compared to a structure in which the entire lens is exposed to the outside.

[0064] In the lighting device A1 according to this embodiment, the gap G1 between the wall portion 812 and the lens 712 in a plan view from the vertical direction (first direction) is such that the test finger F1 does not come into contact with the second portion 7122 of the lens 712. This makes it possible to ensure a distance from the charging portion (sensor portion 711) of the optical sensor 71, and as a result, the possibility of electric shock can be reduced.

[0065] In the illumination device A1 according to this embodiment, the holding portion (non-lens portion) 713 has a protruding portion 716 that faces the second end face 815 of the wall portion 812 in the vertical direction (first direction). This makes it possible to suppress the optical sensor 71 from falling into the illumination space LS1.

[0066] In the lighting device A1 according to this embodiment, when the optical sensor 71 is housed in the case 8, a gap G2 is provided between the wall portion 812 and the non-lens portion (holding portion) 713 in the front-to-back direction (second direction). This makes it possible to suppress displacement of the optical sensor 71 due to the force applied to the optical sensor 71 from the wall portion 812.

[0067] In the lighting device A1 according to this embodiment, the optical sensor 71 is a motion sensor that detects people present in the lighting space LS1. This makes it possible to turn on the light source module 1 depending on whether or not there are people in the lighting space LS1.

[0068] In the illumination device A1 according to this embodiment, the non-lens portion 713 is a holding portion 713 that integrally holds the lens 712 and the sensor portion (detection portion) 711. This makes it possible to integrate the lens 712 and the sensor portion 711.

[0069] (5) Variant The embodiments described above are merely one of many embodiments of this disclosure. The embodiments described above can be modified in various ways depending on the design, etc., as long as the objectives of this disclosure are achieved. The following lists some modifications of the embodiments described above. The modifications described below can be combined and applied as appropriate.

[0070] (5.1) Variation 1 In the above-described embodiment, as shown in Figure 7, a gap G3 is provided between the second end surface 815 of the wall portion 812 and the protruding portion 716 of the holding portion 713 in the vertical direction (first direction). Also, in the above-described embodiment, as shown in Figure 7, a gap G2 is provided between the inner circumferential surface 813 of the wall portion 812 and the holding portion 713 in the front-rear direction (second direction). Therefore, foreign matter in the atmosphere (e.g., dust, dirt, moisture, insects, etc.) may enter the case 8 through gaps G2 and G3.

[0071] Therefore, as shown in Figure 8, a sealing member 14 may be provided between the second end face 815 of the wall portion 812 and the protruding portion 716 of the holding portion 713 in the vertical direction. That is, as in the lighting device according to Modification 1, a sealing member 14 may be further provided, which is positioned between the wall portion 812 and the holding portion (non-lens portion) 713 in the vertical direction (first direction). The sealing member 14 is, for example, a packing with a circular cross-sectional shape. This makes it possible to close the gap G3 (see Figure 7) between the wall portion 812 and the holding portion 713 in the vertical direction, thereby suppressing the intrusion of foreign matter into the case 8.

[0072] The cross-sectional shape of the sealing member 14 is not limited to a circle; for example, it may be square or triangular. In other words, the cross-sectional shape of the sealing member 14 can be any shape as long as it can seal the gap G3 between the wall portion 812 and the holding portion 713.

[0073] (5.2) Variation 2 In the modified example 1, as shown in Figure 8, a sealing member 14 made of packing is placed in the gap G3 between the second end face 815 of the wall portion 812 and the protruding portion 716 of the holding portion 713 in the vertical direction. In contrast, as shown in Figure 9, the second portion 718, which is a part of the protruding portion 716, may be the sealing member 14. That is, the sealing member 14 may be a part (second portion 718) of the holding portion (non-lens portion) 713.

[0074] In the lighting device according to Modification 2, the protruding portion 716 of the holding portion 713 includes a first portion 717 and a second portion 718, as shown in Figure 9. The first portion 717 and the second portion 718 are arranged in the order of first portion 717 and second portion 718 from top to bottom in the vertical direction (first direction). The first portion 717 and the second portion 718 are formed by two-color molding. The first portion 717 is made of the same resin material as the first holder 714 and the second holder 715. The second portion 718 is made of an elastic material such as rubber. By making the material of the second portion 718 that contacts the wall portion 812 an elastic material in this way, it is possible to reduce the force applied to the substrate 73 via the holding portion 713. Furthermore, the gap G3 (see Figure 7) between the second end face 815 of the wall portion 812 and the protruding portion 716 can be sealed by the second portion 718, thereby preventing foreign matter from entering the case 8.

[0075] Furthermore, the entire second retainer 715, which is part of the retaining portion 713, may be made of an elastic material. In this case as well, it is possible to reduce the force applied to the substrate 73 via the retaining portion 713.

[0076] (5.3) Modification 3 In the above embodiment, as shown in Figure 7, the inner circumferential surface 813 of the wall portion 812 is formed along the vertical direction. In contrast, as shown in Figure 10, the inner circumferential surface 813 of the wall portion 812 may be inclined such that the thickness of the wall portion 812 decreases from the second end surface 815 towards the first end surface 814 in the vertical direction (first direction). In other words, the inner circumferential surface 813 of the wall portion 812 may be inclined such that the opening area of ​​the opening 811 increases as it approaches the lighting space LS1 (see Figure 1) side in the vertical direction. The first end surface 814 of the wall portion 812 is, as described above, the end surface on the lighting space LS1 (see Figure 1) side (lower side) in the vertical direction. The second end surface 815 of the wall portion 812 is, as described above, the end surface on the opposite side (upper side) from the lighting space LS1 (see Figure 1) side in the vertical direction.

[0077] In the lighting device according to Modification 3, as described above, the inner circumferential surface 813 of the wall portion 812 is inclined such that the thickness of the wall portion 812 decreases from the second end surface 815 to the first end surface 814 in the vertical direction (first direction). As a result, it is possible to increase the opening area on the lighting space LS1 (see Figure 1) side of the opening 811, and it is possible to widen the detection range of the optical sensor 71 in the horizontal direction (directions parallel to the plane, including the front-to-back and left-to-right directions) compared to the case where the inner circumferential surface 813 of the wall portion 812 is formed along the vertical direction.

[0078] (5.4) Other variations In the embodiment described above, the optical sensor 71 is a motion sensor, but the optical sensor 71 is not limited to a motion sensor; for example, it may be an image sensor. In this case, the lighting device A1, for example, turns on the light source module 1 when it detects a person with the image sensor, and turns off the light source module 1 after a certain period of time has elapsed since the image sensor stopped detecting a person.

[0079] In the above-described embodiment, the lighting device A1 is a lighting fixture that is long in the front-to-back direction, but the lighting device A1 is not limited to the above-described lighting fixture, but may be, for example, a ceiling light. In other words, the lighting fixture A1 is not limited to the lighting fixture described in the above-described embodiment.

[0080] In the embodiment described above, the wall portion 812 is formed around the entire circumference of the opening edge of the opening 811, but the wall portion 812 may be formed only on a part of the opening edge of the opening 811. That is, the wall portion 812 only needs to be formed on at least a part of the opening edge of the opening 811.

[0081] In the embodiment described above, the wall portion 812 protrudes in both the lower side, which is the side of the lighting space LS1, and the upper side, which is the opposite side of the lighting space LS1, in the first direction (vertical direction). In contrast, the wall portion 812 may, for example, protrude only in the lower side, which is the side of the lighting space LS1, or it may protrude only in the upper side, which is the opposite side of the lighting space LS1, in the first direction. In short, the wall portion 812 only needs to protrude in at least one of the sides of the lighting space LS1 and the side opposite the lighting space LS1, in the first direction.

[0082] In the above-described embodiment, the lighting device A1 comprises a light source unit B1, a sensor unit C1, and a device body 5. However, the device body 5 does not necessarily have to be included in the lighting device A1. That is, the lighting device A1 may consist only of the light source unit B1 and the sensor unit C1.

[0083] (Aspect) This specification discloses the following aspects:

[0084] The first embodiment of the lighting device (A1) comprises a light source (11), an optical sensor (71), a power supply (2), and a case (8). The light source (11) irradiates light into the lighting space (LS1). The optical sensor (71) has a lens (712) that protrudes toward the lighting space (LS1). The power supply (2) supplies lighting power to the light source (11) according to the detection result of the optical sensor (71). The case (8) has an opening (811) and houses the optical sensor (71) with the lens (712) exposed toward the lighting space (LS1) through the opening (811). The case (8) has a wall portion (812) at least a part of the opening edge of the opening (811). The lens (712) includes a first portion (7121) and a second portion (7122). The first part (7121) is the portion of the wall portion (812) located on the side of the illumination space (LS1) beyond the end face (814) on the illumination space (LS1) side, when the optical sensor (71) is housed in the case (8). The second part (7122) is the portion of the wall portion (812) located on the opposite side of the illumination space (LS1) from the end face (814). The optical sensor (71) further has a non-lens portion (713). Unlike the lens (712), the non-lens portion (713) faces the protruding wall portion (812) in a second direction (e.g., front-to-back direction) that intersects with the first direction (e.g., up-and-down direction), which is the protruding direction of the lens (712), when the optical sensor (71) is housed in the case (8).

[0085] According to this embodiment, since only the first portion (7121) of the lens (712) is exposed from the wall portion (812), it is possible to suppress scratches on the lens (712) compared to when the entire lens is exposed from the wall portion.

[0086] In the lighting device (A1) according to the second embodiment, in the first embodiment, the wall portion (812) protrudes in a first direction (for example, the vertical direction) to at least one of the side facing the lighting space (LS1) and the side facing the lighting space (LS1).

[0087] According to this embodiment, the wall portion (812) is less likely to come into contact with the second portion (7122) of the lens (712) compared to the case where the wall portion (812) does not protrude.

[0088] In the third embodiment of the lighting device (A1), in the first or second embodiment, the lens (712) is dome-shaped and protrudes toward the lighting space (LS1) in a first direction (e.g., vertical direction). The gap (G1) between the wall portion (812) and the lens (712) in a plan view from the first direction is of a size that restricts the test finger (F1) from contacting the second portion (7122) of the lens (712).

[0089] According to this embodiment, it is possible to prevent a person's finger from coming into contact with the second part (7122) of the lens (712).

[0090] In the illumination device (A1) according to the fourth embodiment, in any one of the first to third embodiments, the wall portion (812) is formed in a cylindrical shape around the entire circumference of the opening edge of the opening (811) in a plan view from a first direction (e.g., up and down direction). The wall portion (812) has an inner circumferential surface (813) that faces the non-lens portion (713) in a second direction (e.g., front and back direction).

[0091] According to this embodiment, it is possible to prevent a person's finger from coming into contact with the second part (7122) of the lens (712) in all directions.

[0092] In the fifth embodiment of the lighting device (A1), in the fourth embodiment, the wall portion (812) has a first end face (814) and a second end face (815). The first end face (814) is the end face on the side facing the lighting space (LS1) in a first direction (for example, the vertical direction). The second end face (815) is the end face on the opposite side from the lighting space (LS1) in the first direction. The inner circumferential surface (813) is inclined such that the thickness of the wall portion (812) decreases from the second end face (815) toward the first end face (814) in the first direction.

[0093] According to this embodiment, it is possible to widen the detection range of the optical sensor (71) in the horizontal direction.

[0094] In the illumination device (A1) according to the sixth embodiment, the non-lens portion (713) has a projection (716) that faces the second end face (815) of the wall portion (812) in a first direction (for example, the vertical direction).

[0095] According to this embodiment, it is possible to prevent the optical sensor (71) from falling into the illuminated space (LS1).

[0096] In the lighting device (A1) according to the seventh embodiment, in any one of the first to sixth embodiments, when the optical sensor (71) is housed in the case (8), a gap (G2) is provided between the wall portion (812) and the non-lens portion (713) in the second direction (for example, the front-to-back direction).

[0097] According to this embodiment, it is possible to suppress displacement of the optical sensor (71) due to force applied to the optical sensor (71) from the wall portion (812).

[0098] The lighting device (A1) according to the eighth embodiment further comprises a sealing member (14) in any one of the first to seventh embodiments. The sealing member (14) is positioned between the wall portion (812) and the non-lens portion (713) in a first direction (for example, the vertical direction).

[0099] According to this embodiment, it is possible to suppress the entry of foreign matter into the case (8).

[0100] In the 9th embodiment of the lighting device (A1), in the 8th embodiment, the sealing member (14) is a part (718) of the non-lens portion (713).

[0101] According to this embodiment, it is not necessary to prepare a sealing member (14) separately from the non-lens portion (713), and the number of parts can be reduced.

[0102] In the lighting device (A1) according to the tenth embodiment, in any one of the first to ninth embodiments, the optical sensor (71) is a motion sensor that detects a person present in the illuminated space (LS1).

[0103] According to this embodiment, it is possible to turn on the light source (11) depending on whether or not there is a person present.

[0104] In the 11th embodiment of the lighting device (A1), in the 10th embodiment, the motion sensor has a detection unit (711) that detects a person by detecting infrared radiation emitted from the human body. The non-lens unit (713) is a holding unit (713) that integrally holds the lens (712) and the detection unit (711).

[0105] According to this embodiment, the lens (712) and the detection unit (711) can be integrated by the non-lens portion (713).

[0106] The configurations relating to the second to eleventh aspects are not essential to the lighting device (A1) and can be omitted as appropriate. [Explanation of Symbols]

[0107] 2 Power supply (power supply) 8 cases 11. Light-emitting element (light source) 14. Sealing member 71 Optical Sensors 711 Sensor unit (detection unit) 712 Lens 713 Retaining part (non-lens part) 716 Protrusion 718 Part 2 (part) 811 Opening 812 Wall 813 Inner surface 814 1st end face (end face) 815 2nd end face 7121 Part 1 7122 Part 2 A1 Lighting device F1 Test Indicator G1 Gap G2 Gap LS1 Lighting Space

Claims

1. A light source that irradiates light into an illuminated space, An optical sensor having a lens protruding toward the illuminated space, A power supply that supplies ignition power to the light source according to the detection result of the optical sensor, The device comprises a case having an opening, through which the lens is exposed to the illumination space side, and which houses the optical sensor, The case has a wall portion at least in part of the opening edge of the opening, The lens is, when the optical sensor is housed in the case, A first portion located on the side of the lighting space than the end face on the lighting space side of the wall portion, A second portion located on the side opposite to the illumination space side from the end face of the wall portion, The aforementioned optical sensor is Unlike the aforementioned lens, the optical sensor has a non-lens portion that faces the wall portion in a second direction that intersects with the first direction, which is the protruding direction of the lens, when the optical sensor is housed in the case. The aforementioned wall portion is In a plan view from the first direction, the opening is formed in a cylindrical shape around the entire circumference of the opening edge of the opening, The inner circumferential surface facing the non-lens portion in the second direction, The first end face is the end face on the illumination space side in the first direction, It has a second end face which is the end face opposite to the illumination space side in the first direction, The inner circumferential surface is inclined such that the thickness of the wall portion decreases in the first direction from the second end face toward the first end face. Lighting device.

2. The non-lens portion has a projection that faces the second end face of the wall portion in the first direction. The lighting device according to claim 1.

3. In the state in which the optical sensor is housed in the case, a gap is provided between the wall portion and the non-lens portion in the second direction. The lighting device according to claim 1 or 2.

4. A light source that illuminates a space with light, An optical sensor having a lens protruding toward the illuminated space, A power supply that supplies ignition power to the light source according to the detection result of the optical sensor, The device comprises a case having an opening, through which the lens is exposed to the illumination space side, and which houses the optical sensor, The case has a wall portion at least in part of the opening edge of the opening, The lens is, when the optical sensor is housed in the case, A first portion located on the side of the lighting space than the end face on the lighting space side of the wall portion, A second portion located on the side opposite to the illumination space side from the end face of the wall portion, The aforementioned optical sensor is Unlike the aforementioned lens, the optical sensor has a non-lens portion that faces the wall portion in a second direction that intersects with the first direction, which is the protruding direction of the lens, when the optical sensor is housed in the case. In the state in which the optical sensor is housed in the case, a gap is provided between the wall portion and the non-lens portion in the second direction. Lighting device.

5. The wall portion protrudes in the first direction toward at least one of the side toward the lighting space and the side toward the opposite side toward the lighting space, A lighting device according to any one of claims 1 to 4.

6. The lens has a dome shape that protrudes toward the illumination space in the first direction, The gap between the wall and the lens in a plan view from the first direction is such that the test finger does not come into contact with the second portion of the lens. A lighting device according to any one of claims 1 to 5.

7. The seal member is further disposed between the wall portion and the non-lens portion in the first direction. A lighting device according to any one of claims 1 to 6.

8. The sealing member is a part of the non-lens portion, The lighting device according to claim 7.

9. The optical sensor is a motion sensor that detects a person present in the illuminated space. A lighting device according to any one of claims 1 to 8.

10. The human presence sensor has a detection unit that detects a person by detecting infrared radiation emitted from the human body, The non-lens portion is a holding portion that integrally holds the lens and the detection portion. The lighting device according to claim 9.

Images