Lighting fixtures

Abstract

To provide a lighting fixture capable of suppressing the generation of abnormal noise when a cover thermally expands. [Solution] The lighting fixture 10 comprises a first light-emitting device 20, a main body including a first plate 41 having a first mounting surface 41a on which the first light-emitting device 20 is placed, a first power supply unit 50 that supplies power to the first light-emitting device 20, a mounting member 70 interposed between the main body 40 and the structure to mount the main body to the structure, and a cover 80 facing the first plate 41, and the first plate 41 has multiple protrusions 41b that contact the cover 80.

Description

[Technical field]

[0001] The present invention relates to a lighting fixture equipped with a light-emitting element such as an LED (Light Emitting Diode). [Background technology]

[0002] In recent years, lighting fixtures using LEDs have rapidly become widespread. As an example of such a lighting fixture, Patent Document 1 discloses a so-called bracket-type lighting fixture that is installed on the wall of a hospital room or guest room. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-222692 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the lighting fixture as described above, abnormal noise may be generated when the cover thermally expands.

[0005] The present invention provides a lighting fixture that can suppress the generation of abnormal noise caused by thermal expansion of a cover. [Means for solving the problem]

[0006] A lighting fixture according to one embodiment of the present invention comprises a light-emitting device, a main body including a plate having a mounting surface on which the light-emitting device is placed, a power supply unit that supplies power to the light-emitting device, a mounting member interposed between the main body and a structure for mounting the main body to the structure, and a cover facing the plate, the plate having a plurality of protrusions that contact the cover. Effect of the Invention

[0007] The lighting fixture of the present invention can suppress the generation of abnormal noise caused by thermal expansion of the cover. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an example of use of a lighting fixture according to an embodiment. [Figure 2A] FIG. 2A is a diagram for explaining a base lighting mode of a lighting device according to an embodiment. [Figure 2B] FIG. 2B is a diagram illustrating the reading light mode of the lighting device according to the embodiment. [Figure 2C] FIG. 2C is a diagram illustrating the night light mode of the lighting device according to the embodiment. [Diagram 3] FIG. 3 is an external perspective view of the lighting fixture according to the embodiment as viewed from above. [Figure 4] FIG. 4 is an exploded perspective view of the lighting fixture according to the embodiment as viewed from above. [Diagram 5] FIG. 5 is an external perspective view of the lighting fixture according to the embodiment as viewed from below. [Figure 6] FIG. 6 is an exploded perspective view of the lighting fixture according to the embodiment as viewed from below. [Figure 7] FIG. 7 is a schematic cross-sectional view of the lighting device according to the embodiment taken along a plane perpendicular to the longitudinal direction. [Figure 8] FIG. 8 is a diagram showing a notch provided at an end in the longitudinal direction of a groove portion of a first plate. [Figure 9] FIG. 9 is a diagram showing the structure of the surface of the mounting member on the main body side. [Figure 10] FIG. 10 is a diagram showing an opening provided in the second plate through which light emitted by the light bulb passes. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments will be described with reference to the drawings. The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples and are not intended to limit the present invention. Furthermore, among the components in the following embodiments, components that are not described in the independent claims showing the highest concept will be described as optional components.

[0010] In addition, each figure is a schematic diagram and is not necessarily illustrated precisely. In addition, in each figure, substantially the same configuration is given the same reference numeral, and duplicated explanations may be omitted or simplified. In the following embodiments, the expression "almost" or "approximately" also means including manufacturing errors, dimensional tolerances, etc.

[0011] Coordinate axes may be shown in the drawings used in the following embodiments. The Z-axis direction is described as the height direction of the lighting fixture. The positive side of the Z-axis may be expressed as the upper side (upward), and the negative side of the Z-axis may be expressed as the lower side (downward). The X-axis direction and the Y-axis direction are perpendicular to each other on a plane perpendicular to the Z-axis direction. The Y-axis direction is described as the longitudinal direction of the lighting fixture. The X-axis direction is described as the lateral direction (width direction) of the lighting fixture.

[0012] (Embodiment) [Lighting fixture configuration] First, a usage example of a lighting fixture according to an embodiment will be described. Fig. 1 is a diagram showing a usage example of a lighting fixture according to an embodiment.

[0013] As shown in Fig. 1, lighting fixture 10 according to the embodiment is an elongated lighting fixture. Specifically, lighting fixture 10 has a prismatic shape. Lighting fixture 10 is attached to, for example, a wall 200 of a hospital room. The wall 200 of the hospital room is an example of a structure. Lighting fixture 10 attached to the wall 200 of the hospital room is located above the head of a user lying in a bed in the hospital room.

[0014] Lighting device 10 can operate in three light emission modes. Figures 2A to 2C are diagrams illustrating the light emission modes of lighting device 10.

[0015] 2A, the lighting fixture 10 emits light upward from the lighting fixture 10 and away from the wall 200. This allows the lighting fixture 10 to illuminate the inside of the patient room.

[0016] 2B, the lighting fixture 10 emits light downward from the lighting fixture 10 and toward the wall 200. This allows the lighting fixture 10 to indirectly illuminate the area around the user's head.

[0017] 2C, lighting device 10 illuminates a light bulb included in lighting device 10. The night light mode is used, for example, at night.

[0018] The detailed configuration of such lighting fixture 10 will be described below. Fig. 3 is an external perspective view of lighting fixture 10 as viewed from above. Fig. 4 is an exploded perspective view of lighting fixture 10 as viewed from above. Fig. 5 is an external perspective view of lighting fixture 10 as viewed from below. Fig. 6 is an exploded perspective view of lighting fixture 10 as viewed from below. Fig. 7 is a schematic cross-sectional view of lighting fixture 10 cut along a plane perpendicular to the longitudinal direction.

[0019] The lighting fixture 10 mainly includes a plurality of first light-emitting devices 20, a plurality of second light-emitting devices 30, a main body 40, a first power supply device 50, a second power supply device 60, a mounting member 70, a light bulb 75, a cover 80, an end cover 90a, and an end cover 90b. Each of the components of the lighting fixture 10 will be described below.

[0020] [First light-emitting device] The first light-emitting device 20 emits light during operation of the base lighting mode. The first light-emitting device 20 is a light-emitting device having an SMD (Surface Mount Device) structure. The lighting device 10 includes a plurality of first light-emitting devices 20, which are arranged in a line in the longitudinal direction of the lighting device 10 on a first mounting surface 41a of a first plate 41 of the main body 40. The first light-emitting devices 20 are elongated and arranged such that the longitudinal direction of the first light-emitting devices 20 is aligned with the longitudinal direction of the lighting device 10. The plurality of first light-emitting devices 20 mainly emit light toward a first light-transmitting portion T1 (shown in FIG. 7) included in a first flat plate portion 81 of the cover 80. Note that the lighting device 10 may include at least one first light-emitting device 20.

[0021] Specifically, the first light emitting device 20 includes a substrate 21 and a plurality of LED elements 22. The first light emitting device 20 may include at least one LED element 22.

[0022] The substrate 21 is a long, flat plate with its longitudinal direction aligned in the Y-axis direction. The shape of the substrate 21 when viewed from a direction perpendicular to the main surface of the substrate 21 is rectangular, but may be another shape.

[0023] The substrate 21 is, for example, a CEM-3 (Composite Epoxy Material-3) substrate based on a resin material, but may be other resin substrates, a metal-based substrate based on a metal material, or a ceramic substrate based on a ceramic material. An example of other resin substrates is a FR-4 (Flame Retardant-4) substrate. An example of a ceramic substrate is an alumina substrate made of aluminum oxide (alumina) or an aluminum nitride substrate made of aluminum nitride. An example of a metal-based substrate is an aluminum alloy substrate, an iron alloy substrate, or a copper alloy substrate.

[0024] Furthermore, the substrate 21 is not limited to a rigid substrate, but may be a flexible substrate whose base material is polyimide or the like.

[0025] The LED element 22 is an SMD type light emitting element that emits white light. The LED element 22 has a package with a recess, an LED chip mounted on the bottom surface of the recess of the package, and a sealing member that fills the recess of the package and seals the LED chip. The LED chip is, for example, a blue LED chip that emits blue light, and the sealing member is, for example, a silicone resin that contains yttrium aluminum garnet (YAG) yellow phosphor particles as a wavelength conversion material. The LED element 22 also has a metal terminal for mounting the LED element 22 on the substrate 21.

[0026] The multiple LED elements 22 are arranged on the main surface of the substrate 21, and emit light using power supplied from the first power supply device 50. Specifically, the multiple LED elements 22 are arranged in a straight line along the longitudinal direction of the substrate 21, constituting a light-emitting element row. The light-emitting element row is located toward the +X-axis side of the substrate 21. The multiple LED elements 22 are arranged, for example, at equal intervals. The multiple LED elements 22 emit light mainly toward a first light-transmitting portion T1 (shown in FIG. 7) included in a first flat plate portion 81 of the cover 80.

[0027] The LED elements 22 are connected in series, for example, by a wiring pattern included in a wiring layer of the substrate 21. Note that the electrical connection mode of the LED elements 22 (specifically, a series connection, a parallel connection, a combination of a series connection and a parallel connection, etc.) is not particularly limited.

[0028] [Second light-emitting device] The second light-emitting device 30 emits light during operation in the reading light mode. The second light-emitting device 30 is a light-emitting device having an SMD structure, similar to the first light-emitting device 20. Specifically, the second light-emitting device 30 includes a substrate 31 and a plurality of LED elements 32. It is sufficient that the second light-emitting device 30 includes at least one LED element 32.

[0029] The second light-emitting device 30 emits light during operation of the reading light mode. The second light-emitting device 30 is a light-emitting device with an SMD structure. The lighting device 10 includes a plurality of second light-emitting devices 30, which are arranged in a line in the longitudinal direction of the lighting device 10 on the second mounting surface 42a of the second plate 42 of the main body 40. The second light-emitting devices 30 are elongated and arranged such that the longitudinal direction of the second light-emitting devices 30 is aligned with the longitudinal direction of the lighting device 10. The plurality of second light-emitting devices 30 mainly emit light toward a second light-transmitting portion T2 (shown in FIG. 7) included in the second flat plate portion 82 of the cover 80. It is sufficient that the lighting device 10 includes at least one second light-emitting device 30.

[0030] Specifically, the second light emitting device 30 includes a substrate 31 and a plurality of LED elements 32. The second light emitting device 30 is required to include at least one LED element 32.

[0031] The substrate 31 is a long, flat plate with its longitudinal direction aligned in the Y-axis direction. The shape of the substrate 31 when viewed from a direction perpendicular to the main surface of the substrate 31 is rectangular, but may be another shape.

[0032] The substrate 31 is, for example, a CEM-3 substrate made of a resin material, but may be other resin substrates, a metal-based substrate made of a metal material, or a ceramic substrate made of a ceramic material. An example of other resin substrates is an FR-4 substrate. An example of a ceramic substrate is an alumina substrate made of aluminum oxide (alumina) or an aluminum nitride substrate made of aluminum nitride. An example of a metal-based substrate is an aluminum alloy substrate, an iron alloy substrate, or a copper alloy substrate.

[0033] Furthermore, the substrate 31 is not limited to a rigid substrate, but may be a flexible substrate whose base material is polyimide or the like.

[0034] The LED element 32 is an SMD type light emitting element that emits white light. The LED element 32 has a package with a recess, an LED chip mounted on the bottom surface of the recess of the package, and a sealing member that fills the recess of the package and seals the LED chip. The LED chip is, for example, a blue LED chip that emits blue light, and the sealing member is, for example, a silicone resin that contains yttrium aluminum garnet (YAG) yellow phosphor particles as a wavelength conversion material. The LED element 32 also has metal terminals for mounting the LED element 32 on the substrate 31.

[0035] The LED elements 32 are disposed on the main surface of the substrate 31, and emit light using power supplied from the first power supply device 50. The LED elements 32 are specifically disposed in a straight line along the longitudinal direction of the substrate 31, constituting a light-emitting element row. The light-emitting element row is located toward the +X-axis side of the substrate 31. The LED elements 32 are disposed, for example, at equal intervals. The LED elements 32 emit light mainly toward the second light-transmitting portion T2 (shown in FIG. 7) of the second flat plate portion 82 of the cover 80.

[0036] The LED elements 32 are connected in series, for example, by a wiring pattern included in a wiring layer of the substrate 31. The electrical connection mode of the LED elements 32 (specifically, a series connection, a parallel connection, a combination of a series connection and a parallel connection, etc.) is not particularly limited.

[0037] [Main body] The main body 40 is a member that integrally holds components such as the plurality of first light-emitting devices 20, the plurality of second light-emitting devices 30, the first power supply device 50, the second power supply device 60, and the cover 80. Specifically, the main body 40 includes a first plate 41, a second plate 42, a first power supply holding plate 43, and a second power supply holding plate (not shown).

[0038] [Main body: First plate] The first plate 41 is an elongated plate extending along the longitudinal direction of the lighting fixture 10. The first plate 41 has a plurality of first light-emitting devices 20, an attachment member 70, a cover 80, and the like fixed thereto with screws.

[0039] The first plate 41 is formed, for example, by bending a steel plate such as SPCC. As shown in Fig. 7, the first plate 41 includes a portion that follows the first flat plate portion 81 of the cover 80 and a portion that follows the third flat plate portion 83 of the cover 80. In the portion that follows the first flat plate portion 81 of the cover 80, a groove portion that has a V-shaped cross section and extends in the longitudinal direction of the lighting device 10 is formed by the bending process.

[0040] The first plate 41 has a first mounting surface 41a. The first mounting surface 41a is a substantially elongated rectangular surface extending along the longitudinal direction of the lighting device 10. The first mounting surface 41a constitutes a part of the groove portion having a V-shaped cross section. A plurality of first light-emitting devices 20 are mounted on the first mounting surface 41a in a line in the longitudinal direction of the lighting device 10. A heat dissipation sheet or an insulating sheet may be disposed between the first light-emitting devices 20 and the first mounting surface 41a.

[0041] The first mounting surface 41a is an inclined surface constituting a part of a groove having a V-shaped cross section. The first mounting surface 41a is inclined with respect to the mounting surface 70a and is neither perpendicular nor parallel to the mounting surface 70a. More specifically, the first mounting surface 41a is inclined so that the first light-emitting device 20 emits light toward the side opposite to the wall 200. This allows the lighting fixture 10 to illuminate a space above the user with direct light of high light intensity during operation in the base lighting mode.

[0042] The first plate 41 is painted white, so that the light emitted by the first light emitting device 20 is reflected by the first plate 41, thereby improving the light utilization efficiency.

[0043] The first plate 41 also has a plurality of protrusions 41b. The plurality of protrusions 41b are arranged in a line in the longitudinal direction on a surface of the first plate 41 that is parallel to the first flat plate portion 81. The plurality of protrusions 41b contact the first flat plate portion 81 (i.e., the cover 80). If the first plate 41 and the cover 80 are in point contact in this manner, abnormal noise caused by contact between the first plate 41 and the cover 80 when the first plate 41 or the cover 80 thermally expands is suppressed.

[0044] Each of the plurality of protrusions 41b is formed, for example, by pressing the first plate 41, but may also be formed by adhering or welding a separate protrusion.

[0045] Incidentally, a notch is provided at a longitudinal end of the groove having a V-shaped cross section. Fig. 8 is a diagram showing a notch 45 provided at a longitudinal end of the groove of first plate 41. In Fig. 8, illustration of cover 80 is omitted.

[0046] More specifically, the notch 45 is provided at the end and bottom of the groove in the longitudinal direction. With such a notch 45, when a foreign object such as an insect carcass gets between the first plate 41 and the cover 80, the foreign object can be dropped into the inside of the main body 40 through the notch 45 by tilting the main body 40 without disassembling the lighting device 10. Therefore, a general user who cannot disassemble the lighting device 10 can easily remove the foreign object from the periphery of the first light-emitting device 20. Note that an opening may be provided at the end of the longitudinal direction of the groove instead of the notch 45. Also, such a notch is not provided at the end of the longitudinal direction of the groove of the second plate 42 described later, but a notch or an opening may also be provided at the end of the longitudinal direction of the groove of the second plate 42.

[0047] [Main body: Second plate] The second plate 42 is an elongated plate extending along the longitudinal direction of the lighting fixture 10. The second plate 42 has a plurality of second light-emitting devices 30 and the like fixed thereto with screws.

[0048] The second plate 42 is formed, for example, by bending a steel plate such as SPCC. As shown in Fig. 7, the second plate 42 includes a portion that follows the second flat plate portion 82 of the cover 80 and a portion that follows the third flat plate portion 83 of the cover 80. In the portion that follows the second flat plate portion 82 of the cover 80, a groove portion that has a V-shaped cross section and extends in the longitudinal direction of the lighting fixture 10 is formed by the above-mentioned bending process.

[0049] The second plate 42 has a second mounting surface 42a. The second mounting surface 42a is a substantially elongated rectangular surface extending along the longitudinal direction of the lighting device 10. The second mounting surface 42a constitutes a side surface of the groove portion having a V-shaped cross section. A plurality of first light-emitting devices 20 are arranged side by side in the longitudinal direction of the lighting device 10 on the second mounting surface 42a. Note that a heat dissipation sheet or an insulating sheet may be arranged between the second light-emitting device 30 and the second mounting surface 42a.

[0050] The second mounting surface 42a is an inclined surface that constitutes a part of a groove having a V-shaped cross section. The second mounting surface 42a is inclined with respect to the mounting surface 70a and is neither perpendicular nor parallel to the mounting surface 70a. More specifically, the second mounting surface 42a is inclined so that the second light-emitting device 30 emits light toward the wall 200. This allows the lighting fixture 10 to illuminate the surroundings of the user with indirect light with a low light intensity during operation in the reading light mode.

[0051] The second plate 42 is painted white, so that the light emitted by the second light emitting device 30 is reflected by the second plate 42, thereby improving the light utilization efficiency.

[0052] The second plate 42 also has a plurality of protrusions 42b. The plurality of protrusions 42b are arranged in a line in the longitudinal direction on a surface of the second plate 42 that is parallel to the second flat plate portion 82. The plurality of protrusions 42b contact the second flat plate portion 82 (i.e., the cover 80). If the second plate 42 and the cover 80 are in point contact in this manner, abnormal noise caused by contact between the second plate 42 and the cover 80 when the second plate 42 or the cover 80 thermally expands is suppressed.

[0053] Each of the multiple protrusions 42b is formed, for example, by pressing the second plate 42, but may also be formed by adhering or welding a separate protrusion.

[0054] The first plate 41 and the second plate 42 described above are connected by, for example, sliding an L-shaped protrusion formed by cutting and raising one of the first plate 41 and the second plate 42 into an opening formed in the other of the first plate 41 and the second plate 42. The first plate 41 and the second plate 42 may be integrally formed by bending a single metal plate.

[0055] [Main body: First power supply holding plate] The first power source holding plate 43 (shown in FIG. 7) is an elongated plate that holds the first power source device 50 and extends along the longitudinal direction of the lighting fixture 10. The cross-sectional shape of the first power source holding plate 43 is V-shaped. The first power source device 50 is screwed to the first power source holding plate 43. The first power source holding plate 43 is formed, for example, by bending a steel plate such as SPCC. The first power source holding plate 43 is screwed to the inner surface of the first plate 41, but may also be screwed to the second plate 42.

[0056] Although not shown, a second power supply holding plate that holds the second power supply unit 60 is also screwed to the inner surface of the first plate 41. The second power supply holding plate that holds the second power supply unit 60 has the same configuration as the first power supply holding plate 43.

[0057] [First power supply] The first power supply device 50 is a device that supplies power to the first light emitting device 20. Specifically, the first power supply device 50 converts AC power obtained via a power cable (not shown) into power suitable for light emission of the multiple LED elements 22 of the first light emitting device 20, and supplies the converted power to the multiple LED elements 22. As a result, the multiple LED elements 22 emit light using the power supplied from the first power supply device 50.

[0058] The first power supply device 50 has an outer shape that is elongated in the longitudinal direction of the lighting fixture 10, and is screwed to the first power supply holding plate 43. The first power supply device 50 is held between the first plate 41 and the second plate 42 by the first power supply holding plate 43. More specifically, the first power supply device 50 is disposed between the surface of the first plate 41 opposite the first mounting surface 41a and the surface of the second plate 42 opposite the second mounting surface 42a. The surface of the first plate 41 opposite the first mounting surface 41a is, in other words, the lower surface of the first plate 41, and the surface of the second plate 42 opposite the second mounting surface 42a is, in other words, the upper surface of the second plate 42.

[0059] This allows the lighting device 10 to be more easily miniaturized than a lighting device in which the first power supply device 50 is disposed outside the main body 40. This realizes a lighting device 10 that is easy to miniaturize. The first power supply device 50 is located closer to the negative side of the Y axis than the second power supply device 60.

[0060] Specifically, the first power supply device 50 includes, for example, a circuit that converts AC power into DC power. The circuit includes a plurality of circuit elements, such as capacitive elements such as electrolytic capacitors or ceramic capacitors, resistive elements such as resistors, rectifier elements, fuses, noise filters, diodes, and semiconductor elements such as integrated circuit elements. The circuit that converts AC power into DC power is, for example, a switching power supply circuit.

[0061] [Second power supply] The second power supply device 60 is a device that supplies power to the second light-emitting device 30. Specifically, the second power supply device 60 converts AC power obtained via a power cable (not shown) into power suitable for light emission of the multiple LED elements 32 of the second light-emitting device 30, and supplies the converted power to the multiple LED elements 32. As a result, the multiple LED elements 32 emit light using the power supplied from the second power supply device 60.

[0062] The second power supply device 60 has a similar structure to the first power supply device 50. The second power supply device 60 has an elongated outer shape extending in the longitudinal direction of the lighting fixture 10, and is screwed to a second power supply holding plate for the second power supply device 60. Similar to the first power supply device 50, the second power supply device 60 is held between the first plate 41 and the second plate 42 by the second power supply holding plate. More specifically, the second power supply device 60 is disposed between the surface of the first plate 41 opposite the first mounting surface 41a and the surface of the second plate 42 opposite the second mounting surface 42a.

[0063] This allows lighting device 10 to be more compact than a lighting device in which second power supply device 60 is disposed outside main body 40. Second power supply device 60 is located closer to the + side of the Y axis than first power supply device 50.

[0064] Specifically, the second power supply device 60 includes, for example, a circuit that converts AC power into DC power. The circuit includes a plurality of circuit elements, such as capacitive elements such as electrolytic capacitors or ceramic capacitors, resistive elements such as resistors, rectifier elements, fuses, noise filters, diodes, and semiconductor elements such as integrated circuit elements. The circuit that converts AC power into DC power is, for example, a switching power supply circuit.

[0065] [Mounting parts] The mounting member 70 is a plate-like member for mounting the main body 40 of the lighting fixture 10 to a structure such as a ceiling or a wall. In other words, the mounting member 70 is a mounting plate. When mounting the lighting fixture 10 to the wall 200, the mounting member 70 is first screwed to the wall 200, and then the main body 40 is attached to the mounting member 70. As a result, the mounting member 70 is interposed between the main body 40 and the wall 200. The mounting member 70 and the main body 40 are screwed together, for example. The mounting member 70 has a mounting surface 70a that faces the wall 200.

[0066] The mounting member 70 is a long plate material, and is formed, for example, by bending a steel plate such as SPCC. The shape of the mounting member 70 when viewed from a direction parallel to the X-axis is rectangular, and the length of the mounting member 70 in the Y-axis direction is approximately the same as the length of the main body 40 in the Y-axis direction.

[0067] A light bulb 75 is disposed on the surface of the mounting member 70 facing the main body 40. Fig. 9 is a diagram showing the structure of the surface of the mounting member 70 facing the main body 40. In other words, the surface facing the main body 40 is the surface opposite to the mounting surface 70a.

[0068] The light bulb 75 is a so-called miniature bulb. The light bulb 75 emits white light with a bulb color when operating in the night light mode. The light bulb 75 is, for example, an LED light bulb, but may also be an incandescent light bulb or the like.

[0069] The light bulb 75 mainly illuminates the negative side of the Z axis (i.e., downward). Here, the lighting device 10 is made smaller by shortening the length in the Z axis direction, and it is not possible to arrange the light bulb 75 so that the light axis is parallel to the Z axis direction so that the light bulb 75 emits light toward the negative side of the Z axis. Therefore, the light axis of the light bulb 75 is inclined with respect to the longitudinal direction of the lighting device 10 so that the light bulb 75 emits light toward the second plate 42 side (i.e., the negative side of the Z axis). This makes it possible to increase the amount of light emitted toward the second plate 42 side compared to when the light bulb 75 is arranged so that the light axis is parallel to the longitudinal direction. In other words, it is possible to improve the utilization efficiency of the light emitted by the light bulb 75.

[0070] Further, a reflector 76 that reflects light emitted by the light bulb 75 toward the second plate 42 is disposed on the surface of the mounting member 70 facing the main body 40. The reflector 76 is located on the +Z axis side of the light bulb 75. The reflector 76 is disposed such that the reflective surface of the reflector 76 faces the light bulb 75 and faces the optical axis of the light bulb 75. The reflector 76 is formed, for example, by bending a steel plate such as SPCC. The reflector 76 is painted white to enhance its light reflectivity. The reflector 76 can increase the amount of light emitted toward the -Z axis side (i.e., toward the second plate 42).

[0071] In order not to block the light emitted by the light bulb 75, an opening 42c through which the light emitted by the light bulb 75 passes is provided in a portion of the second plate 42 facing the light bulb 75. Fig. 10 is a diagram showing the opening 42c provided in the second plate 42 through which the light emitted by the light bulb 75 passes.

[0072] The opening 42c is, for example, a racetrack-shaped elongated hole, but the shape of the opening 42c is not particularly limited. Also, a notch may be provided in the portion of the second plate 42 facing the light bulb 75 instead of the opening 42c.

[0073] [cover] The cover 80 covers the multiple first light emitting devices 20 and the multiple second light emitting devices 30. The cover 80 has a first flat plate portion 81 facing the multiple first light emitting devices 20, a second flat plate portion 82 facing the multiple second light emitting devices 30, and a third flat plate portion 83 connecting the first flat plate portion 81 and the second flat plate portion 82. Each of the first flat plate portion 81, the second flat plate portion 82, and the third flat plate portion 83 has a substantially elongated rectangular shape. The cross-sectional shape of the cover 80 is a square bracket shape.

[0074] The cover 80 includes a light-transmitting portion and a light-shielding portion. The light-transmitting portion is a hatched portion in Figs. 3 to 6. In Fig. 7, the light-transmitting portion is illustrated as a first light-transmitting portion T1 and a second light-transmitting portion T2 using reference symbols, and the portion of the cover 80 other than the first light-transmitting portion T1 and the second light-transmitting portion T2 is a light-shielding portion. The first flat plate portion 81 includes a first light-transmitting portion T1 that transmits light emitted by the plurality of first light-emitting devices 20, the second flat plate portion 82 includes a second light-transmitting portion T2 that transmits light emitted by the plurality of second light-emitting devices 30, and the third flat plate portion 83 does not include a light-transmitting portion.

[0075] Here, the external area of ​​the first light-transmitting portion T1 is larger than the external area of ​​the second light-transmitting portion T2. ​​As a result, during operation in the base lighting mode, the light emitted by the multiple first light-emitting devices 20 can be transmitted through the relatively large first light-transmitting portion T1 to illuminate a wide range of space. On the other hand, during operation in the reading light mode, the light emitted by the multiple second light-emitting devices 30 can be transmitted through the relatively small second light-transmitting portion T2 to illuminate only the periphery of the user. Note that during operation in the night light mode, the light emitted by the light bulb 75 is transmitted through the second light-transmitting portion T2.

[0076] 7, when viewed from a direction perpendicular to the second flat plate portion 82, the light-shielding portion (portion other than the second light-transmitting portion T2) included in the second flat plate portion 82 overlaps with the LED element 32 of the second light-emitting device 30. As described above, the multiple second light-emitting devices 30 emit light from above the user's head toward the user during operation in the reading light mode, but if the area directly below the LED element 32 is light-shielded, it is possible to prevent the user from looking directly at the LED element 32 of the second light-emitting device 30.

[0077] The cover 80 described above is formed, for example, by extrusion molding of polycarbonate resin. Therefore, the cross-sectional shape of the cover 80 cut along a plane perpendicular to the Y-axis direction is substantially the same regardless of the cutting position. Note that the cover 80 may be formed by a method other than extrusion molding. Also, it is not essential that the cover 80 is formed from a resin material, and for example, the light-transmitting portion of the cover 80 may be formed from a glass material.

[0078] [End cover] The end cover 90a is an end cap that covers one end in the longitudinal direction of the main body 40. The end cover 90b is an end cap that covers the other end in the longitudinal direction of the main body 40. The end covers 90a and 90b are formed of a resin material such as polybutylene terephthalate resin, but may be formed of a metal material. The end covers 90a and 90b have a rectangular shape when viewed in a direction parallel to the longitudinal direction.

[0079] Each of the end covers 90a and 90b has a claw portion that engages with an opening provided at an end portion in the longitudinal direction of the main body 40. Each of the end covers 90a and 90b may be fixed to the end portion in the longitudinal direction of the main body 40 by a screw.

[0080] [Effects, etc.] As described above, the lighting fixture 10 includes the first light-emitting device 20, the second light-emitting device 30, the main body 40 including the first plate 41 having the first mounting surface 41a on which the first light-emitting device 20 is mounted and the second plate 42 having the second mounting surface 42a on which the second light-emitting device 30 is mounted, the first power supply device 50 supplying power to the first light-emitting device 20, the second power supply device 60 supplying power to the second light-emitting device 30, and the mounting member 70 interposed between the main body 40 and the wall 200 to mount the main body 40 to the wall 200. The mounting member 70 has a mounting surface 70a facing the wall 200, and each of the first mounting surface 41a and the second mounting surface 42a is inclined with respect to the mounting surface 70a. The first power supply device 50 and the second power supply device 60 are disposed between the surface of the first plate 41 opposite the first mounting surface 41a and the surface of the second plate 42 opposite the second mounting surface 42a. The wall 200 is an example of a structure.

[0081] As a result, since the first power supply device 50 and the second power supply device 60 are disposed inside the main body 40, the lighting device 10 can be more easily miniaturized than a lighting device in which the first power supply device 50 and the second power supply device 60 are disposed outside the main body 40. In other words, a lighting device 10 that is easy to miniaturize is realized. Furthermore, the lighting device 10 can improve the heat dissipation of the first light-emitting device 20 and the second light-emitting device 30 compared to a lighting device in which the first light-emitting device 20 is disposed on one of the front and back surfaces of a single plate material and the second light-emitting device 30 is disposed on the other of the front and back surfaces of the single plate material.

[0082] Also, for example, the first mounting surface 41a is inclined so that the first light-emitting device 20 emits light toward the side opposite the wall 200, and the second mounting surface 42a is inclined so that the second light-emitting device 30 emits light toward the wall 200.

[0083] This allows the lighting fixture 10 to directly illuminate a space with the light emitted by the first light-emitting device 20 and indirectly illuminate a space with the light emitted by the second light-emitting device 30.

[0084] For example, the lighting device 10 further includes a first light-transmitting portion T1 that transmits light emitted by the first light-emitting device 20, a second light-transmitting portion T2 that transmits light emitted by the second light-emitting device 30, and a cover 80 that includes a light-shielding portion. The external area of ​​the first light-transmitting portion T1 is larger than the external area of ​​the second light-transmitting portion T2.

[0085] This allows the light emitted by the first light emitting device 20 to illuminate a wide range in a space, and the light emitted by the second light emitting device 30 to illuminate a narrower range.

[0086] Furthermore, for example, the cover 80 has a first flat plate portion 81 facing the first light-emitting device 20 and including a first light-transmitting portion T1, a second flat plate portion 82 facing the second light-emitting device 30 and including a second light-transmitting portion T2 and a light-shielding portion, and a third flat plate portion 83 including a light-shielding portion connecting the first flat plate portion 81 and the second flat plate portion 82. When viewed from a direction perpendicular to the second flat plate portion 82, the light-shielding portion included in the second flat plate portion 82 overlaps with the LED element 32 provided in the second light-emitting device 30. The LED element 32 is an example of a light-emitting element.

[0087] This can prevent the user from looking directly at the LED element 32 of the second light emitting device 30.

[0088] Furthermore, for example, the main body 40 has a plurality of protrusions 41b and protrusions 42b that come into contact with the cover 80.

[0089] This allows the main body 40 and the cover 80 to be in point contact, thereby suppressing abnormal noise caused by contact between the main body 40 and the cover 80 when the main body 40 or the cover 80 undergoes thermal expansion.

[0090] Also, for example, the lighting device 10 is elongated, and the first plate 41 includes a groove portion extending in the longitudinal direction of the lighting device 10, and an opening or notch 45 is provided at the longitudinal end of the groove portion.

[0091] As a result, if a foreign object such as an insect carcass gets in between the first plate 41 and the cover 80, the foreign object can be dropped into the inside of the main body 40 through the notch 45 by tilting the main body 40 without disassembling the lighting device 10.

[0092] Furthermore, for example, lighting device 10 has an elongated shape and further includes a light bulb 75 disposed on the surface of mounting member 70 facing main body 40. The optical axis of light bulb 75 is inclined with respect to the longitudinal direction of lighting device 10 so that light bulb 75 emits light toward second plate 42.

[0093] This makes it possible to increase the amount of light emitted toward the second plate 42 even when it is not possible to position the light bulb 75 so that its optical axis is parallel to the Z-axis direction. In other words, it is possible to increase the efficiency with which the light emitted by the light bulb 75 is used.

[0094] Also, for example, the second plate 42 is provided with an opening 42c or a cutout through which the light emitted by the light bulb 75 passes.

[0095] This allows the amount of light emitted from the bulb 75 to the outside of the lighting fixture 10 to be increased.

[0096] Furthermore, for example, the lighting device 10 further includes a reflector 76 that is disposed on the surface of the mounting member 70 facing the main body 40 and reflects the light emitted by the bulb 75 toward the second plate 42 .

[0097] This makes it possible to increase the amount of light emitted toward the second plate 42 side.

[0098] (Other embodiments) Although the embodiment has been described above, the present invention is not limited to such an embodiment.

[0099] For example, in the above embodiment, the lighting fixture is elongated, but the lighting fixture may be of any shape. In addition, the use of the lighting fixture is not particularly limited, and the lighting fixture may be installed in, for example, a hotel guest room.

[0100] In the above embodiment, the light emitting device is an SMD structure light emitting device, but may be a COB (Chip On Board) structure light emitting device. In the COB structure light emitting device, an LED chip is used as a light emitting element, the LED chip is directly mounted on a substrate, and the LED chip is sealed with a translucent resin material containing phosphor particles. The light emitting device may be a remote phosphor type light emitting device having an LED chip and a resin member containing phosphor particles arranged at a position away from the LED chip.

[0101] Furthermore, the light emitting element is not limited to an LED chip or an element using an LED chip. For example, a solid-state light emitting element other than an LED chip, such as a semiconductor laser or an organic EL (Electro Luminescence), may be used as the light emitting element.

[0102] Furthermore, as long as the spirit of the present invention is not deviated from, various modifications that would occur to those skilled in the art may be made to the present embodiments, and forms constructed by combining components in different embodiments may also be included within the scope of one or more aspects. [Explanation of symbols]

[0103] 10 Lighting equipment 20 First light emitting device 21, 31 Board 22, 32 LED element (light emitting element) 30 Second light emitting device 40 Main body 41 First Plate 41a First mounting surface 41b, 42b protrusion 42 Second Plate 42a Second mounting surface 42c aperture 45 Cutout 50 First power supply 60 Second power supply 70 Mounting material 70a Mounting surface 75 Light bulb 76 Reflector 80 Cover 81 First flat plate part 82 Second flat plate part 83 Third flat plate part 200 Wall (Structure)

Claims

1. A light emitting device; a main body including a plate having a mounting surface on which the light emitting device is mounted; a power supply device for supplying power to the light emitting device; an attachment member interposed between the main body portion and the structure in order to attach the main body portion to the structure; a cover facing the plate, The main body portion is located between a first flat plate portion and a second flat plate portion included in the cover, The cover is fixed to the main body by a screw. The plate has a plurality of protrusions that contact the first flat plate portion of the cover at a portion along the first flat plate portion. Lighting fixtures.

2. The lighting fixture is elongated, The plurality of protrusions are arranged side by side in the longitudinal direction of the lighting device.

2. A lighting fixture according to claim 1.

3. the plate has a plane parallel to the cover, The plurality of protrusions are arranged side by side on the plane.

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

4. The plate has a plurality of protrusions that contact the inside of the cover. A lighting fixture according to any one of claims 1 to 3.

Images