Lighting fixtures

Abstract

To provide a lighting fixture in which the central part of the light emission area is easily illuminated. [Solution] The lighting fixture 1 comprises a fixture body 10 having a through hole 11 in the center, a substrate 15 arranged around the through hole 11 of the fixture body 10, a plurality of first light-emitting elements 30 mounted on the lower surface 15c of the substrate 15 so as to surround the through hole 11, a plurality of power supply components mounted inside the plurality of first light-emitting elements 30 on the lower surface 15c, and a power supply cover 45 made of resin that is located inside the plurality of first light-emitting elements 30 and covers the light-emitting side of the plurality of power supply components.

Description

Technical Field

[0001] The present disclosure relates to a lighting fixture.

Background Art

[0002] Conventionally, as a lighting fixture, there is a ceiling light described in Patent Document 1. This ceiling light includes a fixture main body having a through hole in a central portion, a substrate fixed to the fixture main body and having a through hole in a central portion, a plurality of LEDs mounted on the substrate, and a diffusion cover that covers the light exit side of the plurality of LEDs and has a substantially circular shape in plan view when viewed from the height direction.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] When a plurality of power supply components are mounted on a substrate, the plurality of power supply components must be covered to prevent electric shock. Against this background, when a plurality of light-emitting elements are mounted so as to surround a through hole provided in a central portion of the substrate, and a plurality of power supply components are mounted inside the plurality of light-emitting elements, a power supply cover that covers the plurality of power supply components is to be installed around the through hole of the substrate. However, in this case, light emitted from the light-emitting elements toward the central portion is reflected and absorbed by the power supply cover, making it difficult to be emitted to the outside, and the central portion of the emission region tends to become dark. Therefore, an object of the present disclosure is to provide a lighting fixture in which the central portion of the emission region tends to be brightened.

Means for Solving the Problem

[0005] To solve the above problems, the lighting fixture according to this disclosure comprises a fixture body having a through hole in the center, a substrate arranged around the through hole of the fixture body, a plurality of light-emitting elements mounted on one side of the substrate so as to surround the through hole, a plurality of power supply components mounted inside the plurality of light-emitting elements on the one side, and a power supply cover made of resin that is located inside the plurality of light-emitting elements and covers the light-emitting side of the plurality of power supply components. [Effects of the Invention]

[0006] According to the lighting fixture described herein, the central part of the light emission area tends to become brighter. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view of a lighting fixture according to one embodiment of the present disclosure, as seen from a diagonally downward angle. [Figure 2] This is a perspective view of the lighting fixture with the diffuser cover removed, seen from a diagonal downward angle. [Figure 3] This is a perspective view of the lighting fixture from a diagonal downward angle, with the power supply cover, which further protects the electronic components, removed from the state shown in Figure 2. [Figure 4] This is a perspective view showing the state after the translucent resin sheet covering the substrate has been removed from the state shown in Figure 3. [Figure 5] This is a perspective view showing the state after the reflective sheet has been removed from the state shown in Figure 4. [Figure 6] This is a plan view of a circuit board on which multiple power supply components, multiple first light-emitting elements, and second light-emitting elements are mounted, as seen from below in the height direction. [Figure 7] This is a perspective view of the first protective cover, taken from a diagonal downward angle in the height direction. [Figure 8] This is a perspective view of the first protective cover, taken from an oblique upward angle in the height direction. [Figure 9] This perspective view is achieved assuming that the second protective cover is no longer visible from the state shown in Figure 2. [Figure 10]This is a perspective view of the movement restricting member, seen from an oblique angle above. [Figure 11] This is a perspective view of the second protective cover, seen from a diagonal downward angle. [Figure 12] This is a perspective view of the second protective cover, seen from an oblique angle above. [Figure 13] This is a perspective view illustrating the relative position of some of the power lines to the second protective cover. [Figure 14] This is a cross-sectional view including the central axis of the example lighting fixture, and an enlarged cross-sectional view of the area around the power cover protecting multiple power supply components in the example lighting fixture. [Figure 15] This is a cross-sectional view including the central axis of the lighting fixture of this embodiment, and an enlarged cross-sectional view of the area around the power supply cover that protects multiple power supply components in the lighting fixture of this embodiment. [Modes for carrying out the invention]

[0008] The embodiments relating to this disclosure will be described in detail below with reference to the attached drawings. Note that if multiple embodiments or modifications are included below, it is intended from the outset that new embodiments may be constructed by appropriately combining their characteristic features. In the following embodiments, the same reference numerals are used for the same components in the drawings, and redundant explanations are omitted. Furthermore, multiple drawings include schematic diagrams, and the dimensional ratios such as length, width, and height of each component do not necessarily match between different drawings. The numerous components described below include several optional components that are not essential. Also, in this specification, the term "omitted" may be used to allow for manufacturing tolerances (manufacturing variations), and may be used to describe the general shape of components, etc.

[0009] In the following description, when terms related to the vertical direction such as down, up, lower side, and upper side are used, they indicate the direction when the lighting fixture 1 is installed on the ceiling. Also, when the height direction is mentioned in the following description, that height direction refers to the height direction of the lighting fixture 1, and when the orthogonal direction is mentioned, that orthogonal direction refers to the direction perpendicular to the height direction. In this embodiment, the lighting fixture 1 is installed on the ceiling with its height direction approximately coinciding with the vertical direction.

[0010] The lighting fixture 1 of the embodiment has a shape that allows the center and radial direction to be identified in a plan view when viewed from below in the height direction. More specifically, the diffusion cover 50 of the embodiment has a dome shape and a substantially circular shape in a plan view when viewed from below in the height direction. In the following description, when "radial direction" is mentioned, it refers to the radial direction of the diffusion cover 50; when "inside" is mentioned, it refers to the radially inward direction; and when "outside" is mentioned, it refers to the radially outward direction. The central axis of the lighting fixture 1 coincides with the central axis of the diffusion cover 50.

[0011] Figure 1 is a perspective view of a lighting fixture 1 according to one embodiment of the present disclosure, viewed from a diagonally downward side. The lighting fixture 1 is a ceiling light and is mounted on the ceiling of a building. As it is a well-known structure, it will not be described in detail, but the lighting fixture 1 includes an adapter (not shown) that is attached to a fixture mounting part (not shown) provided on the ceiling of the building. The lighting fixture 1 also includes a fixture body (base member) 10 that is stationary with respect to the adapter and is positioned along the ceiling substantially parallel to the ceiling, a light-emitting part 20 (see Figures 4 and 5) that is stationary with respect to the fixture body 10, and a diffuser cover 50 that is positioned to cover the light-emitting part 20 and constitutes a light-transmitting cover.

[0012] The fixture body 10 is made of metal or resin. The diffusion cover 50 has a downwardly convex dome shape, and has a substantially circular shape in a plan view when viewed from the lower side in the height direction. The diffusion cover 50 is made of a light-transmitting resin material, for example, polycarbonate, acrylic, silicone, or the like, and diffuses light from the light emitting unit 20 and emits the light downward. In the present embodiment, the light emitting unit 20 emits light based on electric power supplied from the outside via an adapter, but the light emitting unit 20 may also emit light based on electric power supplied from the outside without an adapter.

[0013] Figure 2 is a perspective view of the lighting fixture 1 with the diffusion cover 50 removed, as viewed from an obliquely lower side. As shown in Figure 2, the lighting fixture 1 has a plurality of receivers 40 attached to the lower surface 10a of the fixture body 10 by locking (hooking), screwing, or the like in a state of being arranged at substantially equal intervals in the circumferential direction. The receiver 40 has a recess 41 opening radially outward. The radial direction is included in the orthogonal direction. The diffusion cover 50 has a plurality of protrusions (not shown) protruding radially inward on the inner circumferential surface of the upper edge. The plurality of protrusions are arranged on the diffusion cover 50 at substantially equal intervals in the circumferential direction. A part of the inner surface of the recess 41 is defined by a locking portion (not shown) that protrudes radially outward and locks the protrusion.

[0014] In a state where the circumferential position of the protrusion is different from the circumferential position of the receiver 40, the diffusion cover 50 is brought into contact with the lower surface 10a of the fixture body 10 so as to cover the plurality of receivers 40. Thereafter, when the diffusion cover 50 is relatively rotated to one side in the circumferential direction relative to the fixture body 10, the diffusion cover 50 is elastically deformed radially outward, so that the tapered tip end of the protrusion gets over the locking portion, and the protrusion fits into the recess 41. By this fitting, the protrusion is locked to the locking portion, and the diffusion cover 50 is fixed to the plurality of receivers 40.

[0015] FIG. 3 is a perspective view of the lighting fixture 1, viewed obliquely from below, in a state where the power supply cover 45 that further protects the power supply component 5 has been removed from the state shown in FIG. 2. As shown in FIG. 3, the outer edge of the fixture main body 10 has a substantially circular shape, and a through hole 11 is provided in the central portion of the fixture main body 10. In the present embodiment, the through hole 11 is a cylindrical hole. The lighting fixture 1 includes a substrate 15 sandwiched between a resin sheet 35 described later and the lower surface 10a of the fixture main body 10 at a radially inner central portion. The substrate 15 does not need to be fixed by sandwiching, and may be attached to the lower surface 10a of the fixture main body 10 by a fixing means such as a screw or an adhesive.

[0016] In the present embodiment, when viewed from the height direction (the thickness direction of the substrate 15), the substrate 15 has a substantially rectangular outer edge 15a. Here, the term "substantially rectangular" refers to a shape whose general outline is a rectangle. Substantially rectangular shapes include shapes whose corners are missing due to chamfering or the like when compared with a perfect rectangle, and further include shapes where at least one of a concave portion and a convex portion is provided at one or more locations on the outer edge of a side. When viewed from the height direction (the thickness direction of the substrate 15), the outer edge of the substrate may have a shape other than a substantially rectangular shape, for example, it may have a shape such as a substantially square shape, a substantially circular shape, or a substantially elliptical shape. The substrate 15 has a through hole 15b in a central portion thereof. In the present embodiment, the through hole 15b is a cylindrical hole. The through hole 15b is provided at a position overlapping the through hole 11 in the height direction. A central axis of the through hole 11, a central axis of the through hole 15b, and a central axis of the lighting fixture 1 are located on substantially the same straight line.

[0017] A plurality of power supply components 5 are mounted in a region surrounding the through hole 15b on the lower surface (mounting surface) 15c of the substrate 15. The lower surface 15c constitutes one side surface. The plurality of power supply components 5 are formed of electronic components included in at least one of a power supply device that supplies electric power to the light emitting unit 20 and a control device that controls light emission of the light emitting unit 20. Here, the light emission control is control related to light emission of the light emitting unit 20, and the light emission control includes dimming control, toning control, and on / off control, etc. The power supply device converts external alternating-current power into direct-current power and steps down the voltage to an appropriate voltage. The control device controls turning on and off the lighting fixture 1.

[0018] For example, when the control device receives a wireless signal from a remote control (not shown) indicating that the first light-emitting element (see Figure 4) 30 is turned on, it turns on the switching unit for controlling the light source of the first light-emitting element 30 mounted on the power supply unit. Conversely, when the control device receives a wireless signal from the remote control indicating that the first light-emitting element 30 is turned off, it turns off the switching unit for controlling the light source of the first light-emitting element 30. When the device is turned on, power is supplied to the first light-emitting element 30 and light is emitted from the first light-emitting element 30. When the device is turned off, power to the first light-emitting element 30 is cut off and light is no longer emitted from the first light-emitting element 30. The switching unit is composed of, for example, a transistor.

[0019] As shown in Figure 2, the light-emitting sides of multiple power supply components 5 are covered with a power supply cover 45 to prevent electric shock. The fixing structure of the power supply cover 45 to the fixture body 10 will be described in detail later. The light-emitting sides of multiple first light-emitting elements 30 on the substrate 15 are covered with a translucent resin sheet 35. The resin sheet 35 is substantially similar to the substrate 15 when viewed from the height direction and has a substantially rectangular outer edge that is larger than the substrate 15. The resin sheet 35 includes a cylindrical hole 35a in the center and notches 35b that communicate with the cylindrical hole 35a and are located at substantially equal intervals in the circumferential direction. The resin sheet 35 is formed, for example, by injection molding and is made of polycarbonate, acrylic, or silicone.

[0020] The resin sheet 35 has the same number of optical members 55 as the number of first light-emitting elements 30. In this embodiment, all optical members 55 are included in the resin sheet 35 and are integrally connected. Each optical member 55 is arranged so as to overlap one of the first light-emitting elements 30 when viewed from the height direction. The optical member 55 is a lens positioned on the light-emitting side of the first light-emitting element 30.

[0021] Figure 4 is a perspective view showing the state in which the translucent resin sheet 35 covering the substrate 15 has been removed from the state shown in Figure 3. As shown in Figure 4, the light-emitting unit 20 comprises a plurality of first light-emitting elements 30. The lighting fixture 1 also has a reflective sheet 25. The reflective sheet 25 is sandwiched between the substrate 15 and the resin sheet 35. The reflective sheet 25 is a sheet-like material with a higher reflectivity to light than the substrate 15, and reflects light that is directed directly from the first light-emitting elements 30 to the reflective sheet 25, as well as light that is directed indirectly from the first light-emitting elements 30 to the reflective sheet 25. The reflective sheet 25 has a cylindrical hole 25a in the center and a plurality of notches 25b that communicate with the cylindrical hole 25a and are located at approximately equal intervals in the circumferential direction. The plurality of notches 25b correspond to the notches 35b of the resin sheet 35, and the notches 25b include portions that overlap the notches 35b in the height direction.

[0022] Examples of the reflective sheet 25 include polyester film. The reflective sheet 25 plays a role in increasing the light extraction efficiency of each first light-emitting element 30. Through holes (not shown) are provided at the positions where each first light-emitting element 30 is positioned on the reflective sheet 25. Note that the lighting fixture of this disclosure does not necessarily have a reflective sheet. The resin sheet 35 is fixed to the fixture body 10 with screws in a state where the notch 35b overlaps the notch 25b when viewed from the height direction. In this embodiment, the resin sheet 35 is fixed to the fixture body 10 with screws, but the resin sheet 35 may also be fixed to the fixture body 10 with adhesive, or it may be fixed to the outer edge of the substrate 15 with screws or adhesive.

[0023] Figure 5 is a perspective view showing the state in which the reflective sheet 25 has been removed from the state shown in Figure 4, and Figure 6 is a plan view of the substrate 15 on which the multiple power supply components 5, multiple first light-emitting elements 30, and second light-emitting elements 16 are mounted, as seen from below in the height direction. As shown in Figures 5 and 6, the lighting fixture 1 includes a second light-emitting element 16 mounted on the lower surface 15c of the substrate 15. The second light-emitting element 16 constitutes the light source of the night light. The multiple first light-emitting elements 30 are arranged outside the multiple power supply components 5 and the second light-emitting elements 16 so as to surround the multiple power supply components 5 and the second light-emitting elements 16.

[0024] In this embodiment, the first light-emitting element 30 and the second light-emitting element 16 are composed of LED (light-emitting diode) chips. However, the light-emitting elements mounted on the substrate may be composed of semiconductor laser element chips or the like, or of semiconductor light-emitting element chips other than LED chips. Alternatively, the first light-emitting element 30 may be composed of an organic EL (Electro-Luminescence) element or an inorganic EL element chip.

[0025] Next, the structure of the power supply cover 45 will be described in detail. Referring to Figure 2, the power supply cover 45 defines a donut-shaped chamber 18 that is sealed on the lower side in the height direction. The power supply cover 45 has a first protective cover 60 and a second protective cover 70. Figure 7 is a perspective view of the first protective cover 60 as seen from the lower side in the height direction, and Figure 8 is a perspective view of the first protective cover 60 as seen from the upper side in the height direction.

[0026] As shown in Figure 7, the first protective cover 60 is an annular, integral resin member and has a first through-hole 61 in its center, which is a substantially cylindrical hole. The first protective cover 60 also has a second through-hole 62 located between the first through-hole 61 and the outer edge 67 in a part of its circumferential direction. The first protective cover 60 has a fixing piece 64 that protrudes radially outward from the annular wall portion 63 defining the first through-hole 61 toward the second through-hole 62. The fixing piece 64 is provided with a screw hole 64a and a mounting base 64c including a through-hole 64b. A movement restricting member 85 (see Figures 9 and 10) is placed on the mounting base 64c.

[0027] Figure 9 is a perspective view assuming that the second protective cover 70 is no longer visible from the state shown in Figure 2, and Figure 10 is a perspective view of the movement restricting member 85 viewed from diagonally above. Figure 11 is a perspective view of the second protective cover 70 viewed from diagonally below, and Figure 12 is a perspective view of the second protective cover 70 viewed from diagonally above. As shown in Figure 9, when the second protective cover 70 is removed from the power supply cover 45, the second light-emitting element 16 mounted on the substrate 15 becomes visible when viewed from the height direction. As shown in Figures 9 and 10, the movement restricting member 85 has a substantially L-shaped housing recess 85a for housing the power supply line 81, and the power supply line 81 is housed in the housing recess 85a.

[0028] As shown in Figure 10, the movement restricting member 85 has a pair of locking portions 85b at its upper end. On the other hand, as shown in Figure 11, the second protective cover 70 has a groove 70a that extends in the height direction and has a closed lower end, and as shown in Figure 12, it has a pair of projections 70b at its upper end. By engaging a pair of locking claws 85c provided on the tip side of the pair of locking portions 85b with the outer side surfaces 70c of the pair of projections 70b, the movement restricting member 85 and the second protective cover 70 are integrated into one unit.

[0029] During this integration, the approximately L-shaped opening of the approximately L-shaped receiving recess 85a is closed by the groove 70a. The movement restricting member 85 and the second protective cover 70 work together to define an approximately L-shaped passage. A portion of the power line 81 is constrained by being housed within this approximately L-shaped passage, thereby restricting the movement of a portion of the power line 81. As shown in Figure 13, the second protective cover 70 has a movement restricting portion 70d positioned circumferentially apart from the groove 70a, and the movement restricting portion 70d includes a first plate portion 73a extending approximately in the height direction and a second plate portion 73b projecting radially inward from the lower end of the first plate portion 73a. A portion of the power line 81 is hooked onto the upper side of the second plate portion 73b.

[0030] As shown in Figure 13, the power supply line 81 extends from the power supply unit, passes through a roughly L-shaped passage, and then extends from the lower opening of the roughly L-shaped passage, through the upper side of the second plate portion 73b, to the adapter attached to the fixture mounting portion on the ceiling. By restricting the position of the power supply line 81 with the roughly L-shaped passage and the movement restricting portion 70d, the excess portion of the power supply line 81 is effectively constrained, and the reflection of the power supply line 81 in the illumination light is suppressed.

[0031] As shown in Figure 2, the first protective cover 60 has a plurality of first protrusions 65 that are spaced apart in the circumferential direction on the peripheral edge of the upper end and protrude radially outward. The first protrusions 65 have through holes 65a that extend in the height direction. When viewed from the height direction, the first protrusions 65 have a planar shape corresponding to the notches 35b and 25b and overlap the notches 35b and 25b in the height direction. The first protrusions 65 include portions that are located inside the notches 35b and 25b. The first protective cover 60 is screw-fixed to the device body 10 with the substrate 15 sandwiched between the through holes 65a.

[0032] The second protective cover 70 is fitted into the second through-hole 62 of the first protective cover 60 so as to cover the light-emitting side of the second through-hole 62. As shown in Figure 11, the second protective cover 70 has a plate portion 70e that extends substantially perpendicularly and includes a portion located between the groove portion 70a and the movement restricting portion 70d in the circumferential direction. The plate portion 70e has a screw hole 70f. With the second protective cover 70 fitted into the second through-hole 62, the screw hole 70f of the second protective cover 70 overlaps in the height direction with the screw hole 64a (see Figure 7) of the fixing piece 64 of the first protective cover 60. The second protective cover 70 is fixed to the first protective cover 60 and the device body 10 by inserting the shaft of a screw (not shown) through the screw hole 70f and the screw hole 64a and then tightening it into the device body 10.

[0033] As shown in Figures 11 and 12, the second protective cover 70 has a lens 71. When the second protective cover 70 is fixed to the first protective cover 60 and the main body 10, the optical axis of the second light-emitting element 16 is located substantially on the same line as the central axis of the lens 71. The second protective cover 70 is made of a transparent resin material, such as transparent acrylic, transparent polycarbonate, or transparent silicone-based resin material, or transparent glass material. On the other hand, the first protective cover 60 is made of a white resin material. Polycarbonate or polybutylene terephthalate can be suitably used as the resin material constituting the first protective cover 60.

[0034] By constructing the second protective cover 70 from a transparent material, light emitted downwards in the height direction from the second light-emitting element 16 passes through the lens 71 and the diffusion cover 50 and is emitted downwards. Furthermore, by constructing the first protective cover 60, which occupies most of the power supply cover 45, from a white resin material, the reflectivity of the light emitted from the first light-emitting element 30 and reaching the first protective cover 60 can be increased. Therefore, the light extraction efficiency can be increased, and bright illumination light can be easily emitted.

[0035] Next, the structure of the power supply cover 45 will be described in more detail. The first protective cover 60 preferably covers more than 80% of the light-emitting side of the power supply component 5, and all light-emitting sides of the power supply component 5 It is even more preferable to cover the components. Conventionally, power supply covers, which cover power supply components to prevent electric shock, are made of metal parts, taking cost and other factors into consideration. Furthermore, when power supply covers are made of metal parts, the minimum distance between the metal cover and the power supply component is stipulated by law for each power supply component in order to reliably prevent electric shock. The above minimum distance varies depending on the voltage used by the corresponding power supply component.

[0036] In this context, since the power supply cover 45 of the lighting fixture 1 is made of resin, the regulations regarding the minimum distance between the power supply component 5 and the power supply cover when the power supply cover is made of a metal cover do not need to be applied. In the lighting fixture 1, for each of the two or more power supply components 5, the power supply cover 45 includes locations where the distance to the power supply component 5 is shorter than the minimum distance between the power supply component 5 and the metal cover as stipulated by law when the power supply component 5 is covered with a metal cover.

[0037] As shown in Figure 7, the outer surface of the first protective cover 60 has one or more second protrusions 68 that project outward along the power supply component 5, and in this embodiment, there are multiple second protrusions 68. Also, as shown in Figure 8, the inner surface of the first protective cover 60 has recesses 69 at locations corresponding to each second protrusion 68. A part of the corresponding power supply component 5 is housed in the recess 69.

[0038] Next, the effects of the lighting fixture 1 will be explained. Figure 14 is a cross-sectional view including the central axis of the reference example lighting fixture 101, and is an enlarged cross-sectional view of the area around the power cover 145 that protects the multiple power supply components 105. Referring to Figure 14, the reference example lighting fixture 101 has a substrate 115 with a through hole 115a in the center, multiple power supply components 105 mounted around the through hole 115a on the lower surface 115b of the substrate 115, and a power cover 145 that covers the light-emitting side of the multiple power supply components 105. The power cover 145 is made of metal, and the minimum distance between it and each power supply component 105 is greater than or equal to the distance stipulated by law. In addition, the outer surface of the power cover 145 is dome-shaped with no irregularities.

[0039] In the example lighting fixture 101, the minimum distance between the power supply cover 145 and each power supply component 105 must be greater than or equal to the distance stipulated by law, so the volume of the area enclosed by the power supply cover 145 tends to be large. Therefore, as shown by arrow A in Figure 14, light emitted from the light-emitting element 130 located outside the power supply cover 145 towards the center is more likely to reach the power supply cover 145 and be absorbed or reflected outwards by the power supply cover 145. As a result, the central part of the illumination tends to become darker, and dimming of the illumination center is likely to occur.

[0040] In contrast, the lighting fixture 1 of the present disclosure comprises a fixture body 10 having a through hole 11 in the center, a substrate 15 arranged around the through hole 11 of the fixture body 10, a plurality of first light-emitting elements 30 mounted on the lower surface of the substrate 15 so as to surround the through hole 11, a plurality of power supply components 5 mounted inside the plurality of first light-emitting elements 30 on the lower surface, and a power supply cover 45 made of resin that is located inside the plurality of first light-emitting elements 30 and covers the light-emitting side of the plurality of power supply components 5.

[0041] In other words, according to the lighting fixture 1 of this disclosure, the power supply cover 45 that covers the light-emitting side of multiple power supply components 5 mounted on a substrate 15 arranged around the through-hole 11 of the fixture body 10 so as to surround the through-hole 11 is made of resin. Therefore, the minimum distance between the power supply cover 45 and each power supply component 5 can be reduced compared to when the power supply cover is made of a metal part, and the volume of the area surrounded by the power supply cover 45 can be reduced. As a result, light emitted towards the center from multiple first light-emitting elements 30 arranged outside the power supply cover 45 so as to surround the multiple power supply components 5 is less likely to reach the power supply cover 45. As a result, the light emitted towards the center from the first light-emitting elements 30 is more likely to pass outside the power supply cover 45 and be emitted to the outside, so the central part of the illumination light can be made brighter.

[0042] In each of the two or more power supply components, it is preferable that the power supply cover includes a portion where the distance to the power supply component is shorter than the shortest distance between the power supply component and the metal cover as stipulated by law. With this configuration, the volume of the area surrounded by the power supply cover 45 can be effectively reduced, and the brightness of the central part of the illumination light can be increased.

[0043] As shown in Figure 15, it is preferable that the outer surface of the power supply cover 45 has a second protrusion 68 that protrudes outward along the power supply component 5, and the inner surface of the power supply cover 45 has a recess 69 at a location corresponding to the second protrusion 68, in which a part of the power supply component 5 is housed. With this configuration, the distance between the covering portion of the power supply cover 45 that covers the area where the power supply component 5 is not present and the substrate 15 can be shortened. Therefore, as shown by the light indicated by arrow B in Figure 15, the light emitted from the first light-emitting element 30 on the outside of the power supply cover 45 toward the center can easily pass outside the covering portion which is closer to the substrate 15, and is more easily emitted toward the center. Thus, the light on the central side of the illumination can be effectively brightened.

[0044] In the lighting fixture 1, the power supply cover 45 is made of resin, and furthermore, the power supply cover 45 is provided with the aforementioned second protrusion 68 and recess 69. Therefore, light emitted from the first light-emitting element 30 on the outside of the power supply cover 45 toward the center can easily pass outside the covering portion, which is closer to the substrate 15. Thus, in a cross-section including the optical axis L and the central axis of the innermost inner light-emitting element 30a (see Figure 15) among the multiple first light-emitting elements 30, when the angle between the direction of propagation of light emitted from the inner light-emitting element 30a toward the central axis and the optical axis of the inner light-emitting element 30a that does not reach the power supply cover 45 is θ (see Figure 15), the lighting fixture 1 can make θ an angle greater than 50°. Furthermore, the inventors have confirmed that it is possible to make θ 53° or more, which is extremely difficult to achieve with conventional configurations, and have also confirmed that it is possible to make θ an angle of 55° or more or 60° or more. In this way, by manufacturing the lighting fixture 1 of this embodiment, the brightness of the central part of the illumination light can be made significantly higher.

[0045] The outer surface of the light-emitting side of the power supply cover 45 may include a white outer surface portion. With this configuration, the light emitted from the first light-emitting element 30 and reaching the white outer surface portion (the outer surface of the first protective cover 60) is more easily reflected by that outer surface portion. Therefore, the light extraction efficiency can be increased, and bright illumination light can be realized.

[0046] This disclosure is not limited to the above embodiments and their modifications, and various improvements and modifications are possible within the scope of the claims of this application and their equivalents. For example, in the above embodiments, the power cover that covers a plurality of power supply devices mounted around the through-holes of the substrate is composed of a first protective cover and a second protective cover. However, the power cover that covers a plurality of power supply devices mounted around the through-holes of the substrate may consist of only one resin protective cover, or it may consist of three or more resin protective covers.

[0047] Furthermore, the second light-emitting element constituting the night light was mounted inside the multiple first light-emitting elements and mounted in the mounting area of ​​the power supply components. However, the second light-emitting element constituting the night light may be mounted outside the mounting area of ​​the multiple power supply components, or it may be placed outside the power supply cover. The case in which the resin sheet 35 includes a lens corresponding to each first light-emitting element 50 was also described, and the case in which the resin sheet 35 includes multiple lenses was also described. Here, the multiple lenses may consist of two or more different lenses. Also, the resin sheet may have fewer lenses than the number of first light-emitting elements, and there may be first light-emitting elements for which there is no corresponding lens. Alternatively, the resin sheet may not have any lenses.

[0048] The case in which the first protective cover 60 is made of white resin has been described. However, the base material of the first protective cover may be made of a resin other than white, and a white coating containing white pigment may be formed on the light-emitting outer surface of the base material. Alternatively, the outer surface of the power supply cover does not have to have a white portion; for example, the entire power supply cover may be made of transparent resin. Furthermore, as described above, in the lighting fixture of this disclosure, since the power supply cover is made of resin, there is no legal problem in bringing the power supply cover into contact with the power supply components. In other words, in the lighting fixture of this disclosure, the power supply cover may include a contact portion that comes into contact with the power supply components. In this case, further miniaturization of the power supply cover can be achieved, and the brightness of the central part of the illumination light can be further increased. Alternatively, in order to prevent thermal degradation caused by the power supply cover coming into contact with the power supply components, the power supply cover may be made so as not to come into contact with the power supply components.

[0049] Furthermore, the lighting fixtures of this disclosure may have the following configurations. Configuration 1: A lighting fixture comprising: a fixture body having a through hole in the center; a substrate arranged around the through hole of the fixture body; a plurality of light-emitting elements mounted on one side of the substrate so as to surround the through hole; a plurality of power supply components mounted inside the plurality of light-emitting elements on the one side; and a power supply cover made of resin, located inside the plurality of light-emitting elements and covering the light-emitting side of the plurality of power supply components. Configuration 2: The lighting fixture according to Configuration 1, wherein in each of the two or more power supply components, when the power supply component is covered with a metal cover, the distance to the power supply component is shorter than the shortest distance between the power supply component and the metal cover as stipulated by law, and this distance is included in the power supply cover. Configuration 3: A lighting fixture according to Configuration 1 or 2, wherein in a cross-section including the optical axis direction and the central axis of the innermost inner light-emitting element among the plurality of light-emitting devices, there exists light emitted from the inner light-emitting element toward the central axis at an angle of more than 50° in the optical axis direction and that does not reach the power supply cover. Configuration 4: The outer surface of the power supply cover has a protrusion (the second protrusion described above) that protrudes outward along the power supply component, and the inner surface of the power supply cover has a recess at a location corresponding to the protrusion. A lighting fixture according to any one of configurations 1 to 3, wherein a part of the power supply component is housed in the recess. Configuration 5: A lighting fixture according to any one of Configurations 1 to 4, wherein the outer surface of the light-emitting side of the power supply cover includes a white outer surface portion. [Explanation of Symbols]

[0050] 1 Lighting fixture, 5 Power supply components, 10 Fixture body, 10a Bottom surface of fixture body, 11 Through hole of fixture body, 15 Substrate, 15a Outer edge of substrate, 15b Through hole of substrate, 15c Bottom surface of substrate, 16 Second light-emitting element, Chamber 18, 20 Light-emitting part, 25 Reflective sheet, 25a Cylindrical hole of reflective sheet, 25b Notch of reflective sheet, 30 First light-emitting element, 30a Inner light-emitting element, 35 Resin sheet, 35a Cylindrical hole of resin sheet, 35b Notch of resin sheet, 40 Receiving bracket, 41 Recess of receiving bracket, 45 Power supply cover, 50 Diffuser cover, 55 Optical component (lens), 60 First protective cover, 61 First through hole of first protective cover, 62 Second through hole of first protective cover, 63 64 Annular wall portion, 64 Fixing piece, 64a Screw hole of fixing piece, 64b Through hole of fixing piece, 64c Mounting base, 65 First projection of first protective cover, 65a Through hole of first projection, 67 Outer edge of first protective cover, 68 Second projection of first protective cover, 69 Recess, 70 Second protective cover, 70a Groove portion of second protective cover, 70b Projection portion of second protective cover, 70c Side surface of second protective cover, 70d Movement restricting portion of second protective cover, 70e Plate portion of second protective cover, 70f Screw hole of second protective cover, 71 Lens of second protective cover, 81 Power line, 85 Movement restricting member, 85a Receiving recess of movement restricting member, 85b Locking portion of movement restricting member, 85c Locking claw of movement restricting member.

Claims

1. The device body has a through hole in the center, A substrate arranged around the through hole of the main body of the device, Multiple light-emitting elements are mounted on one side surface of the substrate so as to surround the through-hole, A plurality of power supply components mounted inside the plurality of light-emitting elements on one side, A power supply cover made of resin is located inside the plurality of light-emitting elements and covers the light-emitting side of the plurality of power supply components, A lighting fixture equipped with [the necessary features].

2. The lighting fixture according to claim 1, wherein in each of the two or more power supply components, the power supply cover includes a portion where the distance from the power supply component is shorter than the shortest distance between the power supply component and the metal cover as defined by law when the power supply component is covered with a metal cover.

3. The lighting fixture according to claim 1 or 2, wherein in a cross-section including the optical axis direction and the central axis of the innermost inner light-emitting element among the plurality of light-emitting devices, there exists light emitted from the inner light-emitting element toward the central axis at an angle of more than 50° in the optical axis direction and that does not reach the power supply cover.

4. The outer surface of the power supply cover has a protrusion that extends outward along the power supply component, and the inner surface of the power supply cover has a recess at a location corresponding to the protrusion. The lighting fixture according to claim 1 or 2, wherein a part of the power supply component is housed in the recess.

5. The lighting fixture according to claim 1 or 2, wherein the outer surface of the light-emitting side of the power supply cover includes a white outer surface portion.

Images