JP2021153003A - Illuminating device - Google Patents

Abstract

To provide an illuminating device which can not only produce spot light and diffused light but which can cause the diffused light to be easily emitted to a wide range and to become beautiful and well-looking light.SOLUTION: An illuminating device 1 has at least a part in the Z-direction stored in a hole provided in a ceiling. The illuminating device 1 includes: a casing 10 that has one side opened in the Z-direction; a first light source 25 which is placed in the casing 10, has the surroundings covered by an inner circumferential surface 88 of the casing 10 entirely in the circumferential direction, and emits first light to a lower region in the Z-direction; a second light source 80 which is located outwardly relative to the inner circumferential surface 88 in the radial direction, and which emits second light to an external region in the R-direction; and an annular and planar guide plate 83 which includes an inner circumferential surface 83a into which at least some second light enters, and which spreads in the R-direction.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a lighting device.

Conventionally, there is one described in Patent Document 1 as a lighting device capable of emitting spot light and diffused light. This lighting device includes a first LED (Light Emitting Diode) and a plurality of second LEDs located at intervals on a concentric circle centered on the first LED, and each of the first and second LEDs is on the lower side in the height direction. Light is emitted to the diode. The lighting device further includes a dome-shaped lens arranged so as to cover the periphery of the first LED, and a hood-shaped panel arranged on the outer side in the radial direction of the lens. This lighting device generates spot light by controlling the light distribution of the light emitted from the first LED with a lens, and generates diffused light by diffusing the light emitted from the second LED with a panel.

JP-A-2015-210965

In the above-mentioned lighting device, since each of the first and second LEDs is arranged so as to emit light downward in the height direction, it is difficult to irradiate a wide range of diffused light generated by the emitted light of the second LED. Further, since the second LED is arranged so as to emit light downward in the height direction, it is easy for a person to visually recognize the second LED as a particle-like light emitting point, and it is difficult to generate beautiful and beautiful diffused light.

Therefore, an object of the present disclosure is to provide an illuminating device that can not only generate spot light and diffused light but also easily irradiate diffused light over a wide range to produce beautiful and beautiful light.

In order to solve the above problems, the lighting device according to the present disclosure is a lighting device in which at least a part in the height direction is housed in a hole provided in the ceiling, and the first light is in one side region in the height direction. A first light source that emits light, an annular coating that opens on one side in the height direction and covers the entire circumference of the first light source, and an annular coating that is arranged outside the annular coating and is orthogonal to the height direction. A second light source that emits a second light to an outer region in the radial direction, and an annular and plate-shaped light guide plate that extends in the radial direction including an inner peripheral surface on which at least a part of the second light is incident are provided. ..

According to the lighting apparatus according to the present disclosure, not only spot light and diffused light can be generated, but also diffused light can be easily irradiated over a wide range to produce beautiful and beautiful light.

It is a perspective view when the lighting apparatus which concerns on one Embodiment of this disclosure is seen from the diagonally upper side. It is a perspective view when the lighting device is seen from the diagonally lower side. It is an exploded perspective view when the illuminating device is disassembled into three main parts. It is sectional drawing when the illuminating device is cut by the plane passing through the central axis. It is a perspective view when the 1st light source of a lighting apparatus is seen from the diagonally lower side. It is a perspective view when the substrate folder of a lighting apparatus is seen from the diagonally upper side. It is a perspective view when the board folder is seen from the diagonally lower side. It is a perspective view when the substrate folder in the state which holds the 1st light source properly is seen from the diagonally upper side. It is a perspective view when the board folder in the state shown in FIG. 8 is seen from the diagonally lower side. It is a perspective view when the upper housing of a lighting device is seen from the lower side. It is a perspective view when the 2nd assembly of a lighting apparatus is seen from obliquely above. It is a perspective view when the 2nd assembly is seen from diagonally below. It is a perspective view when the reflective member holder of the 2nd assembly is seen from obliquely above. It is a perspective view when the reflective member holder is seen from diagonally below. It is a perspective view when the reflective member of the 2nd assembly is seen from obliquely above. It is a perspective view when the reflective member is seen from diagonally below. It is a perspective view which looked at the 3rd assembly of a lighting apparatus from diagonally above. It is a perspective view which looked at the 3rd assembly from diagonally below. It is a perspective view of the connecting housing of the 3rd assembly viewed from diagonally above. It is a perspective view which looked at the connecting housing from diagonally below. It is a perspective view of the cylindrical diffusion member of the 3rd assembly. It is a perspective view of the light guide plate of the 3rd assembly. It is a perspective view of the diffusion plate of the 3rd assembly. It is a perspective view which shows the 2nd assembly and 3rd assembly which were integrated and integrated. It is a perspective view which shows the relative position of the 1st light source and the substrate holder with respect to the 2nd and 3rd assemblies integrated integrally.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. When a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that a new embodiment is constructed by appropriately combining the characteristic portions thereof. Further, in the following examples, the same components are designated by the same reference numerals in the drawings, and duplicate description will be omitted. In addition, the dimensional ratios such as length, width, and height of each member do not always match between different drawings. Further, in the drawings and the following description, the R direction is the radial direction of the lighting device 1, the radial direction of the annular and plate-shaped light guide plate 83 described below, and the θ direction is the circumference of the lighting device 1. The direction is the circumferential direction of the light guide plate 83. Further, the Z direction is the height direction of the lighting device 1, and coincides with the vertical direction in the state where the lighting device 1 is appropriately fixed to the ceiling. The R, θ, and Z directions are orthogonal to each other.

Further, in the following description, the upper side refers to the side opposite to the light emitting side in the height direction, and the lower side refers to the light emitting side in the height direction. Further, the central axis of the lighting device 1 is defined as the central axis of the light guide plate 83. Further, among the components described below, the components not described in the independent claims indicating the highest level concept are arbitrary components and are not essential components. In addition, when the word "abbreviation" is used in this specification, it is used in the same meaning as the word "roughly speaking", and the requirement "abbreviation" is used if the person looks like "abbreviation". It is filled. For example, the requirement of a substantially circular shape is met if a person looks roughly circular.

FIG. 1 is a perspective view of the lighting device 1 according to the embodiment of the present disclosure when viewed from an obliquely upper side, and FIG. 2 is a perspective view of the lighting device 1 when viewed from an obliquely lower side. As shown in FIG. 1, the lighting device 1 is a downlight, and is fixed to the ceiling by using a hole provided in the ceiling of, for example, a building, for example, an ABW (Activity based working) office, condominium, or hotel. Will be done. The lighting device 1 is installed on the ceiling of a room, for example, used for intensive work or study, and also for relaxing.

As shown in FIG. 1, the lighting device 1 includes a housing 10. The housing 10 has a mounting base on which the first light source 25 (see FIGS. 4 and 11) is mounted inside, while the second light source 80 (see FIG. 4) and the third light source 90 (see FIG. 4) are mounted on the outer peripheral surface thereof. And stand still with respect to the first to third light sources 25,80,90. The housing 10 has a plurality of fins 12 projecting upward in the Z direction, and the entire housing also functions as a heat sink for dissipating heat generated by the first to third light sources 25, 80, 90, particularly fins. 12 dissipates heat from each of the light sources 25, 80, 90 to the outside air. Therefore, it is preferable that the housing 10 is made of a material having high thermal conductivity such as a metal material. The housing 10 is formed by integrally molding the main body 11 and the fins 12 with, for example, aluminum die casting. The housing may be configured to join the main body and fins. In this case, for example, the main body and the fin may be connected by inserting the protrusion provided in the main body into the hole provided in the fin and then plastically deforming the protrusion. The housing does not have to have fins.

The housing 10 further includes an upper flange 14, a lower flange 15, and a substantially cylindrical upper tubular portion 16. The upper cylindrical portion 16 is located on the upper side of the housing 10, and the fins 12 project upward from the upper tubular portion 16. The upper tubular portion 16 has a cylindrical outer peripheral surface 16a. The upper flange 14 has a disk shape and extends outward in the R direction from the outer peripheral surface 16a of the cylinder. Further, the lower flange 15 is located below the upper flange 14 at intervals in the Z direction from the upper flange 14. The lower flange 15 extends to the outside in the R direction with respect to the upper flange 14.

Although not described in detail because it has a known configuration, the lighting device 1 includes a plurality of mounting springs (not shown). The plurality of mounting springs are arranged at substantially equal intervals in the θ direction of the outer peripheral surface of the cylinder 16a, and each mounting spring is fixed to, for example, the outer peripheral surface of the cylinder 16a. The mounting spring is composed of, for example, a metal plate having a bent portion, and has a leaf spring structure. By distorting the mounting spring, the root side portion of the mounting spring is provided along the circumference of the inner peripheral surface (for example, the inner peripheral surface of the cylinder) of the through hole (embedded hole) provided in the ceiling and extending in the substantially vertical direction. The mounting spring is displaced so as to extend in the Z direction so that at least a part of the root side portion presses the inner peripheral surface of the through hole outward in the radial direction. Then, the stationary portion of the mounting spring located on the tip side of the root side portion extends outward from the through hole in the radial direction and is stationary in the ceiling along the ceiling.

In this way, the mounting spring is fixed around the through hole. The mounting spring is fixed to the housing 10. Therefore, the housing 10 is fixed around the through hole. With the illuminating device 1 properly fixed to the ceiling, at least a part of the illuminating device 1 in the Z direction is accommodated in the through hole. In a state where the lighting device 1 is properly fixed to the ceiling, the upper surface of the upper flange 14 abuts on the lower surface of the ceiling or faces the lower surface in the Z direction with a slight interval. May be good. Further, at least a part of the housing 10 in the Z direction may be accommodated in the through hole while the lighting device 1 is appropriately fixed to the ceiling, and the lighting device 1 is appropriately fixed to the ceiling. In this state, only a part of the mounting spring forming a part in the Z direction of the lighting device 1 may be accommodated in the through hole. Further, the hole provided in the ceiling may be a bottomed hole instead of a through hole, and the lighting device may be fixed to the ceiling by means other than the mounting spring.

As shown in FIG. 2, the illuminating device 1 has a reflecting member 17, a glare cut cap 18, and an opening 29 on the lower side. As will be described in detail later, the reflecting member 17 has a reflecting surface 17a which is an inner peripheral surface, and the reflecting surface 17a reflects the first light emitted from the first light source 25 downward. The reflective surface 17a may be formed by any known method. For example, the reflective surface 17a is formed by providing a metal layer such as an aluminum layer on the base material of the reflective member 17 made of metal or resin by vapor deposition, plating, sputtering, or the like. It may be formed by providing a white coating film containing a white pigment. Alternatively, the reflective surface 17a may be formed by forming the reflective member 17 with a metal such as silver, aluminum, or stainless steel, and mirror-processing a part of the metal. Alternatively, the reflective surface 17a may be formed by fixing a mirror-surfaced aluminum material to the base material of the reflective member 17 made of metal or resin.

The glare cut cap 18 has a main body portion 18a and a mounting portion 18b located on the central axis of the substantially reflective surface 17a. The glare cut cap 18 is installed to prevent light from the first light source 25 from directly entering the eyes and to remove or soften glare (unpleasant glare). The mounting structure of the glare cut cap 18 will be briefly described later.

FIG. 3 is an exploded perspective view of the illuminating device 1 when it is disassembled into three main parts, and FIG. 4 is a cross-sectional view of the illuminating device 1 when it is cut by a plane passing through its central axis. As shown in FIG. 3, the lighting device 1 includes a first assembly 20, a second assembly 40, and a third assembly 70. As shown in FIG. 4, the housing 10 has an upper housing 10a, a connecting housing 10b as an annular partition wall portion, and a lower housing 10c. The upper housing 10a is located above the housing 10 and has fins 12 and an upper flange 14. Further, the lower housing 10c is located on the lower side of the housing 10 and has an opening 29 for irradiating the first light from the first light source 25 to the outside. Further, the connecting housing 10b has a lower flange 15. As will be described later, the connecting housing 10b is screwed to the upper housing 10a and also screwed to the lower housing 10c. By this screwing, the upper housing 10a, the connecting housing 10b, and the lower housing 10c are integrated into a pair. The connecting housing 10b connects the upper housing 10a and the lower housing 10c.

As shown in FIGS. 3 and 4, the first assembly 20 is an assembly including a first light source 25 and an upper housing 10a for fixing the first light source 25. The first assembly 20 has a first light source 25 and a substrate holder 30. FIG. 5 is a perspective view of the first light source 25 when viewed from diagonally below. As shown in FIG. 5, the first light source 25 includes a substrate 25a and a light emitting unit 25b. The substrate 25a has a flat plate shape having a substantially rectangular plan view. Further, the light emitting portion 25b has a disk-like shape and is arranged substantially at the center of the lower surface (mounting surface) of the substrate 25a. The light emitting unit 25b has, for example, a COB (Chip On Board) structure, and the light emitting unit 25b is a sealing member that seals one or more LEDs (light emitting diodes) mounted on the substrate 25a and a plurality of LEDs. Includes 25c.

The substrate 25a is composed of, for example, a ceramic substrate, a resin substrate, a metal base substrate, or the like. Although not described in detail, a pair of electrode terminals and a predetermined pattern of metal wiring are formed on the substrate 25a. The pair of electrode terminals are provided to receive DC power for causing the LED to emit light from the outside. Further, a predetermined pattern of metal wiring is provided to supply electric power to the LED.

The LED is composed of, for example, a bare chip that emits a single color of visible light, and is composed of a blue LED chip that emits blue light when energized. Only one LED may be mounted on the substrate, but when the light emitting unit 25b has a plurality of LEDs, the plurality of LEDs are arranged in a matrix on the substrate 25a, for example. The sealing member is made of, for example, a translucent resin and contains a phosphor. The phosphor plays a role in wavelength-converting the light from the LED. The sealing member is composed of, for example, a phosphor-containing resin in which phosphor particles are dispersed in a silicone resin. When the first light source 25 is a blue LED chip that emits white light and the LED emits blue light, the phosphor particles are composed of, for example, a YAG-based yellow phosphor.

As the sealing member, all the LEDs may be sealed at once, a plurality of LEDs may be sealed in a line for each row, or each LED may be individually sealed one by one. .. Further, the first light source may include a light emitting element other than the LED, and may include a semiconductor laser element, a solid light emitting element such as an organic EL (Electro Luminescence) element or an inorganic EL element, and the like.

FIG. 6 is a perspective view when the substrate holder 30 is viewed from an obliquely upper side, and FIG. 7 is a perspective view when the substrate holder 30 is viewed from an oblique lower side. As shown in FIG. 6, the substrate holder 30 has a substantially circular edge in a plan view and has a rectangular through hole 30a passing through the center. Further, the substrate holder 30 has a recess 30b having a shape corresponding to the substrate 25a in the central portion of the upper surface thereof, and the through hole 30a passes through the recess 30b. The through hole 30a has a light emitting portion accommodating hole 30c having a shape corresponding to the light emitting portion 25b in the central portion thereof. Further, as shown in FIG. 7, two optical control units 30d having an arcuate plan view are provided on the lower surface of the substrate holder 30 at locations where the through holes 30a do not exist and corresponding to the periphery of the light emitting unit 25b. Have.

FIG. 8 is a perspective view of the substrate holder 30 in a state of appropriately holding the first light source 25 when viewed from diagonally above, and FIG. 9 is a state in which the first light source 25 is appropriately held. It is a perspective view when the board holder 30 is seen from the diagonally lower side. As shown in FIG. 8, the substrate 25a of the first light source 25 is fitted into the recess 30b (see FIG. 6) with almost no gap, and in that state, the upper surface 25d of the substrate 25a is the substrate holder 30. It is located on substantially the same plane as the upper surface 30f.

Further, as shown in FIG. 9, when the substrate holder 30 appropriately holds the first light source 25 and is viewed from the lower side in the Z direction, the entire lower surface of the light emitting portion 25b is the light emitting portion accommodating hole portion. It is exposed downward from 30c in the Z direction. The light control unit 30d controls the traveling direction of the light emitted from the light emitting unit 25b downward in the Z direction so as to increase the efficiency of the fixture. The substrate holder 30 has a plurality of screw holes 30e. FIG. 10 is a perspective view of the upper housing 10a when viewed from below. As shown in FIG. 10, a plurality of screw holes 19 corresponding to the plurality of screw holes 30e of the substrate holder 30 are provided on the lower surface of the upper housing 10a. When screws (not shown) are tightened in the order of screw holes 30e and screw holes 19 from the lower side of the substrate holder 30 that appropriately holds the first light source 25, the first assembly 20 (see FIG. 3) is configured. ..

Next, the structure of the second assembly 40 will be described. The second assembly 40 is an assembly composed of a plurality of members, and controls the light distribution of the first light from the first light source 25. FIG. 11 is a perspective view of the second assembly 40 when viewed from diagonally above, and FIG. 12 is a perspective view of the second assembly 40 when viewed from diagonally below. Further, FIG. 13 is a perspective view of the reflective member holder 41 of the second assembly 40 when viewed from diagonally above, and FIG. 14 is a perspective view of the reflective member holder 41 when viewed from diagonally below. Further, FIG. 15 is a perspective view of the reflective member 45 of the second assembly 40 when viewed from diagonally above, and FIG. 16 is a perspective view of the reflective member 45 when viewed from diagonally below.

As shown in FIG. 13, the reflective member holder 41 is an annular member and has an annular plate-shaped base portion 41a, an inner cylindrical portion 41b, an outer cylindrical portion 41c, and a plurality of projecting portions 41d. The inner tubular portion 41b has a cylindrical shape, and the plan view of the base portion 41a is located outside the inner edge 41e of the circular through hole in the R direction, and projects upward from the upper surface of the base portion 41a in the Z direction. Further, the outer tubular portion 41c has a cylindrical shape and projects upward in the Z direction from the outer edge portion on the upper surface of the base portion 41a. The central axes of the inner edge 41e, the inner cylindrical portion 41b, and the outer tubular portion 41c of the through hole coincide with the central axis of the lighting device 1, and the outer tubular portion 41c is spaced from the inner tubular portion 41b. Facing in the R direction. Further, the plurality of projecting portions 41d are located between the outer cylindrical portion 41c and the inner tubular portion 41b in the R direction, and are located at intervals in the θ direction. Each protruding portion 41d protrudes upward in the Z direction from the upper surface of the base portion 41a. The upper surface of the base portion 41a has an annular end surface 42g in a plan view between the circular inner edge 41e and the inner cylindrical portion 41b in the R direction. The annular end surface 42g extends substantially parallel to a plane (Rθ plane) orthogonal to the Z direction.

As shown in FIG. 15, the reflective member 45 is an annular member and has a central axis that substantially coincides with the central axis of the lighting device 1. The reflective member 45 has an upper opening 45a having a substantially circular shape in a plan view on the upper side, and a tapered outer peripheral surface 45b whose outer diameter increases toward the lower side. Further, as shown in FIG. 16, the reflective member 45 has a tapered inner peripheral surface 45c whose inner diameter increases toward the lower side, and has a lower opening 45d having a substantially circular plan view on the lower side.

With reference to FIG. 4 again, the mounting portion 18b of the glare cut cap 18 has an annular and flat plate-shaped annular plate-shaped portion 18c, and the annular plate-shaped portions 18c are located at substantially equal intervals in the θ direction. Then, it is connected to the main body portion 18a via a plurality of pillar portions 18d extending in the R direction. As shown in FIG. 4, by placing the annular plate-shaped portion 18c and the lower end surface 45e of the reflective member 45 in this order on the upper side of the annular end surface 41 g (see also FIG. 13) of the reflective member holder 41, FIG. As shown in the above, the glare cut cap 18 and the reflective member 45 are housed inside the inner tubular portion 41b in the R direction to form the second assembly 40.

Next, the structure of the third assembly 70 will be described. The third assembly 70 is an assembly in which the connecting housing 10b and the second light source 80 (see FIG. 4) and the third light source 90 (see FIG. 4) described below are integrated in a pair. FIG. 17 is a perspective view of the third assembly 70 viewed from diagonally above, and FIG. 18 is a perspective view of the third assembly 70 viewed from diagonally below. Further, FIG. 19 is a perspective view of the connecting housing 10b viewed from diagonally above, and FIG. 20 is a perspective view of the connecting housing 10b viewed from diagonally below. 21 is a perspective view of the cylindrical diffusion member 74 of the third assembly 70, FIG. 22 is a perspective view of the annular and plate-shaped light guide plate 83, and FIG. 23 is an annular and plate-shaped diffusion. It is a perspective view of a plate 86.

As shown in FIG. 19, the connecting housing 10b is an annular member, and is connected to a lower flange 15 having a through hole in the center and an inner end portion of the lower flange 15 in the R direction and is connected to the upper side of the lower flange 15. It has a substantially cylindrical tubular portion 71 extending in the Z direction from the lower side to the lower side. Further, the connecting housing 10b has an annular groove 72 on the outer surface of the tubular portion 71 on the upper surface of the lower flange 15 in the R direction. The groove 72 is located outside the tubular portion 71 in the R direction at a distance from the tubular portion 71 in the R direction, and the central axis of the groove 72 substantially coincides with the central axis of the lighting device 1. do. As shown in FIG. 21, the tubular diffusion member 74 has a substantially cylindrical ring shape. As shown in FIG. 17, the lower end portion of the tubular diffusion member 74 is accommodated in the annular groove 72. The tubular diffusion member 74 is formed by injection molding using, for example, a material in which particles such as titanium oxide and calcium carbonate are kneaded in a transparent resin material such as acrylic and polycarbonate in a dispersed state.

As shown in FIG. 20, the connecting housing 10b has a substantially annular recess 75 that opens downward in the Z direction. Specifically, the connecting housing 10b has an annular covering portion 76 extending downward in the Z direction from the outer edge portion of the lower surface of the lower flange 15. The recess 75 is defined by a lower flange 15, a tubular portion 71, and an annular covering portion 76. With reference to FIG. 4, the illuminating device 1 has a second light source 80 fixed to a first outer peripheral surface 78 (see also FIG. 20) located below the lower flange 15 in the cylindrical portion 71. The second light source 80 emits the second light to the outer region in the R direction. The second light source 80 includes an LED tape light (LED ribbon light, LED strip light). The LED tape light has, for example, a structure in which a plurality of LEDs are arranged at regular intervals and laminated with resin in a flat tape-like shape together with wiring, and is used by cutting and pasting to a desired length. LED tape lights are flexible and can be installed on curved surfaces. Further, the LED tape light can be fixed to a wall or the like by using double-sided tape or a fixture. The second light source 80 is fixed to the first outer peripheral surface 78 of the tubular portion 71 over the entire circumference by using double-sided tape or a fixture. The LED tape light tends to emit linear and uniform light. For this reason, the second light source 80 tends to emit light that is radially uniform in the R direction over the entire circumference in the θ direction. Although the case where the second light source 80 includes the LED tape light has been described, the second light source 80 may include bullet-shaped LEDs arranged at intervals in the circumferential direction. Alternatively, the second light source 80 may include a tube light, a rope light, or the like in which LEDs and small light bulbs are arranged in a flexible tube. Further, the second light source may include a light emitting element other than the LED, and may include a semiconductor laser element, a solid light emitting element such as an organic EL element or an inorganic EL element, and the like.

Further, as shown in FIG. 4, the illuminating device 1 has a third light source 90 fixed to a second outer peripheral surface 79 (see also FIG. 19) located above the lower flange 15 in the cylindrical portion 71. .. The third light source 90 also includes an LED tape light (LED ribbon light, LED strip light) like the second light source 80. The third light source 90 is fixed to the second outer peripheral surface 79 of the tubular portion 71 over the entire circumference by using double-sided tape or a fixture. The third light source 90 faces the cylindrical diffusion member 74 in the R direction at intervals. The tubular diffusion member 74 is sandwiched between the upper flange 14 and the lower flange 15, so that there is no gap in the Z direction between the tubular diffusion member 74 and the flanges 14 and 15.

The third light source 90 emits the third light to the outer region in the R direction. Since the third light source 90 includes the LED tape light, the third light source 90, like the second light source 80, easily emits uniform light radially in the R direction over the entire circumference in the θ direction. Although the case where the third light source 90 includes the LED tape light has been described, the third light source 90 may also include the bullet-shaped LEDs arranged at intervals in the circumferential direction, like the second light source 80. Often, a flexible tube may include a tube light, a rope light, or the like in which LEDs or small light bulbs are arranged. Further, the third light source may include a light emitting element other than the LED, and may include a semiconductor laser element, a solid light emitting element such as an organic EL element or an inorganic EL element, and the like.

As shown in FIG. 4, the third assembly 70 further includes a light guide plate 83 and a diffusion plate 86 (see also FIG. 18). The light guide plate 83 is an annular and plate-shaped translucent member that spreads in the R direction, and includes an inner peripheral surface 83a on which at least a part of the second light emitted by the second light source 80 is incident. FIG. 22 is a perspective view of the light guide plate 83, and FIG. 23 is a perspective view of the diffusion plate 86. As shown in FIGS. 4 and 22, the light guide plate 83 has a disk shape having a circular through hole in the center in a plan view when viewed from the Z direction. Further, as shown in FIGS. 4 and 23, the diffusion plate 86 has the same planar shape as the light guide plate 83 (both the same size and shape). As shown in FIG. 4, the light guide plate 83 and the diffusion plate 86 are stacked in the order of the light guide plate 83 and the diffusion plate 86 in the Z direction from the top, and are housed in the recess 75 (see FIG. 20) of the connecting housing 10b. NS. As shown in FIG. 4, the second light source 80 faces the light guide plate 83 in the R direction at intervals.

The light guide plate 83 is made of, for example, a transparent polycarbonate resin, a transparent acrylic resin, a transparent silicone resin, glass, or the like. Although not shown, the light guide plate 83 has a plurality of prisms on the upper end surface. Prism is, for example, a truncated cone-shaped hole, a conical hole, a dimple, a triangular columnar groove, a groove having a shape corresponding to a ridge, a truncated cone-shaped protrusion, a conical protrusion, a hemispherical protrusion, or a triangular columnar shape. It is composed of a protruding portion, a ridge-shaped protruding portion, or the like. The plurality of prisms may include only prisms having the same shape, or may include two or more different prisms. The second light incident on the light guide plate 83 from the second light source 80 is reflected by the prism and then incident on the diffuser plate 86 from above. The prism may be provided on the lower end surface of the light guide plate 83. The thickness of the diffuser plate 86 is thinner than the thickness of the light guide plate 83. The diffusion plate 86 is formed by injection molding using, for example, a material in which particles such as titanium oxide and calcium carbonate are kneaded into a transparent resin material such as acrylic and polycarbonate in a state of being dispersed. The diffuser plate 86 diffuses the light incident from the light guide plate 83 and irradiates the lower region.

FIG. 24 is a perspective view showing the second assembly 40 and the third assembly 70 that are integrated and integrated. As shown in FIG. 11, the reflective member holder 41 of the second assembly 40 has a screw hole 41f extending in the Z direction, and as shown in FIG. 17, the connecting housing 10b also extends in the Z direction. It has a screw hole 77. As shown in FIG. 24, by tightening the screws 93 in the order of the screw holes 77 of the connecting housing 10b and the screw holes 41f of the reflective member holder 41, the connecting housing 10b and the reflective member holder 41 are fastened, and as a result, the connecting housing 10b and the reflective member holder 41 are fastened. , The second assembly 40 and the third assembly 70 are integrally integrated.

As shown in FIG. 11, the reflective member holder 41 has an annular projecting portion 43 projecting upward on the outer edge portion on the outer side in the R direction. With reference to FIG. 4, when the connecting housing 10b is fastened to the reflective member holder 41 with the screw 93, the upper end surface 43a of the annular protrusion 43 presses the lower surface of the diffusion plate 86 upward, and as a result, the light guide plate. The annular outer edge portion 83b of the upper end surface of 83 is pressed against the lower surface 55 of the lower flange 15. That is, when the connecting housing 10b is fastened to the reflective member holder 41, the light guide plate 83 and the diffuser plate 86 stacked in the Z direction are sandwiched between the lower flange 15 and the reflective member holder 41 in the Z direction. Further, the outer peripheral surface of the light guide plate 83 is in contact with the inner peripheral surface 76a of the annular coating portion 76 over the entire circumference in the θ direction, and the light guide plate 83 is positioned in the R direction by the annular coating portion 76. Similarly, the outer peripheral surface of the diffusion plate 86 also contacts the inner peripheral surface 76a of the annular coating portion 76 over the entire circumference in the θ direction, and the diffusion plate 86 is also positioned in the R direction by the annular coating portion 76. There is. As a result, the light guide plate 83 and the diffuser plate 86 are positioned at predetermined positions in the lighting device 1.

A reflector or a reflective sheet whose lower surface is a reflective surface may be arranged between the upper surface of the light guide plate 83 and the lower end surface of the lower flange 15, and in this case, the light is emitted to the lower side. The amount of light emitted can be increased, and the efficiency of the fixture can be increased. Further, although it is essential that the lighting device 1 is provided with the light guide plate 83, it is not necessary to include the diffuser plate 86.

As shown in FIG. 10, on the lower end surface of the upper housing 10a, in addition to the screw holes 19 for fixing the substrate holder 30, screw holes 38 for fixing the connecting housing 10b (see FIG. 17) are provided. , As shown in FIG. 17, the connecting housing 10b has a screw hole 39 extending in the Z direction. The third assembly 70 can be fixed to the first assembly 20 by tightening screws (not shown) in this order from the lower side of the connecting housing 10b, the screw holes 39 of the connecting housing 10b, and the screw holes 38 of the upper housing 10a. , The lighting device 1 is configured.

FIG. 25 is a perspective view showing the relative positions of the first light source 25 and the substrate holder 30 with respect to the integrally integrated second and third assemblies 40 and 70. As shown in FIG. 25, the first light source 25 is arranged so that its central axis substantially coincides with the central axis of the illuminating device 1. As shown in FIG. 4, in a state where the first light source 25 is fixed at a predetermined position in the lighting device 1, the light emitting portion 25b of the first light source 25 is in the R direction of the substantially circular upper opening 45a of the reflection member 45. It is located on the inner side.

Next, the light emitted from each of the light sources 25, 80, 90 will be described. The color temperature of the light emitted from each of the light sources 25, 80, 90 may be any color temperature. For example, the color temperature of the first light emitted from the first light source 22 which is the spot light may be 2500K to 3500K. The color temperature of the second light emitted from the second light source 80, which is diffused light, may be, for example, 2500K to 6500K, and the color temperature of the third light emitted from the third light source 90, which is indirect light, may be, for example. For example, it may be 2500K to 3500K. Further, the amount of light emitted from each of the light sources 25, 80, 90 may be any value. However, it is preferable that the amount of the second light emitted from the second light source 80 is larger than the amount of the first light emitted from the first light source 25, and the amount of the first light emitted from the first light source 25 is , It is preferable that the amount of light is larger than the amount of the third light emitted from the third light source 90.

As described above, at least a part of the lighting device 1 in the Z direction is housed in a hole provided in the ceiling. Further, the lighting device 1 includes a housing 10 in which one side (lower side) in the Z direction opens, and an inner peripheral surface 88 (see FIG. 4) of the housing 10 which is arranged in the housing 10 and whose circumference covers the entire circumference. ), And a first light source 25 that emits the first light in one side region in the Z direction (lower region in the Z direction) is provided. Further, the illuminating device 1 is located outside the inner peripheral surface 88 in the radial direction and emits the second light to the outer region in the R direction, and the inside where at least a part of the second light is incident. An annular and plate-shaped light guide plate 83 that includes a peripheral surface 83a and extends in the R direction is provided.

According to the present disclosure, spot light can be emitted from the first light source 25 to the lower region in the Z direction. Further, the second light source 80 can emit the second light outward in the R direction to guide the second light in the annular light guide plate 83 spreading in the R direction. Then, the second light traveling radially in the R direction can be irradiated downward from the light guide plate 83. Therefore, it is easy to irradiate the diffused light over a wide range. Further, not only the light emitting portion of the second light source 80 faces outward in the R direction, but also the light emitting portion can be hidden by the light guide plate 83. Therefore, it is difficult for a person to visually recognize the light emitting portion of the second light source, it is difficult for a person to feel the graininess of the light emitting portion, and the diffused light can be made into beautiful and beautiful light.

Further, the lighting device 1 is arranged outside the inner peripheral surface 88 of the housing 10 and on the side opposite to one side in the Z direction (upper side in the Z direction) with respect to the second light source 80, and is located in the outer region in the R direction. A third light source 90 that emits three lights may be provided. Further, the lighting device 1 includes a tubular diffusion member 74 that is located outside the third light source 90 in the R direction, has a cylindrical shape, extends in the Z direction, and diffuses at least a part of the third light. You may.

According to this configuration, the third light source 90 can emit the third light outward in the R direction, and the third light can be diffused to the ceiling side via the cylindrical tubular diffuser member 74, which is indirect. Can generate light. Therefore, in addition to the spot light to the lower side composed of the first light and the diffused light to the lower side composed of the second light, it is possible to generate indirect light that mainly illuminates the upper side of the ceiling or the like. Therefore, three completely different types of illumination light can be generated, and a completely different space can be produced. In addition, three types of faint light with completely different visual impressions can be emitted, and a novel and stylish lighting device can be realized.

In this case, by adjusting the inclination angle of the tapered outer peripheral surface 45b of the reflecting member 45 with respect to the Z direction, the narrow angle is 13 ° to 19 ° (for example, 16 °) and the narrow angle is 13 ° to 19 ° (for example, 16 °) from the illuminating device 1. Spot light having a color temperature of 2800K to 3200K (for example, 3000K) may be irradiated. Further, the lighting device 1 may irradiate diffused light having a color temperature of 4700K to 5300K (for example, 5000K) or indirect light having a color temperature of 2800K to 3200K (for example, 3000K). In this way, it is possible to create a contrast between the brightness of the bright area and the dark area, and to generate spot light that can enhance the immersive effect. For example, a person can efficiently work with a personal computer. Can be executed as a computer. In addition, the entire space can be brightened and diffused light without darkness can be generated, so that, for example, a person can efficiently perform paper work or the like. In addition, it is possible to softly wrap the space and realize indirect light without glare, effectively produce a space where people feel healing, and create a space suitable for people to meditate.

Further, the housing 10 extends in the Z direction and is located on the side opposite to one side in the Z direction with respect to the first outer peripheral surface 78 and the first outer peripheral surface 78 to which the second light source 80 is attached, and is located in the Z direction. Along with extending, a second outer peripheral surface 79 to which the third light source 90 is attached, and a lower portion extending outward in the radial direction so as to separate the first outer peripheral surface 78 and the second outer peripheral surface 79 in the Z direction. An integral connecting housing (annular partition wall portion) 10b including the side flange 15 may be included.

According to the above configuration, the lower flange 15 can completely separate the light emitting region of the second light source 80 and the light emitting region of the third light source 90. Therefore, it is possible to clarify the difference in the roles of the second light emitted by the second light source 80 and the third light emitted by the third light source 90, and it is possible to produce a completely different space and illumination light, and the visual sense is completely felt. Two different types of light can be realized. Furthermore, since the second light source 80 and the third light source 90 are fixed to the same integral member, the relative position of the third light source 90 with respect to the second light source 80 can be precisely controlled, and the intended illumination light can be obtained. It can be realized accurately.

Further, as shown in FIG. 4, the upper end surface 15a of the lower flange 15 on the third light source 90 side (upper side) in the Z direction is on the lower side in the Z direction (third light source 90 side) as it goes outward in the R direction. The inclined surface 15b located on the opposite side) may be provided outside in the R direction. Then, the cylindrical diffusion member 74 may be located inside the inclined surface 15b in the R direction.

According to this configuration, the upper end surface 15a of the lower flange 15 has an inclined surface 15b located on the lower side in the Z direction toward the outside in the R direction on the outside in the R direction, so that indirect light is emitted from the inclined surface 15b. Can be extended downwards with, for example, a wider area above the wall of the room can be illuminated with indirect light. Further, since the cylindrical diffusion member 74 is located inside the inclined surface 15b in the R direction, it is difficult for a person to visually recognize the third light source 90, and the indirect light can be made beautiful and beautiful.

Further, the amount of light emitted by the second light source 80 may be larger than the amount of light emitted by the first light source 22. Further, the amount of light emitted by the first light source 22 may be larger than the amount of light emitted by the third light source 90.

According to this configuration, the room can be brightened by bright diffused light, and it is easy to generate spot light that promotes concentration. In addition, it is easy to generate relaxing indirect light.

The present disclosure is not limited to the above-described embodiment and its modifications, and various improvements and changes can be made within the scope of the claims of the present application and the equivalent scope thereof.

For example, in the above embodiment, the second light source 80 and the third light source 90 are fixed to the same connecting housing 10b, and the second light and the third light, which are the respective emitted lights, are separated by the lower flange 15. explained. However, the second light source and the third light source do not have to be fixed to the same member, and the second light source and the third light source do not have to be separated by a flange. Further, although the case where the lighting device 1 includes the third light source 90 and the tubular diffusion member 74 has been described, the lighting device may not include the third light source and the cylindrical diffusion member 74. Further, although the case where the lighting device 1 includes the glare cut cap 18, the case where the lighting device 1 includes the glare cut cap 18 may not be provided.

1 Lighting device, 10 housing, 10a upper housing, 10b connecting housing, 10c lower housing, 14 upper flange, 15 lower flange, 15b inclined surface, 22 first light source, 74 tubular diffuser, 78th 1 outer peripheral surface, 79 second outer peripheral surface, 80 second light source, 83 light guide plate, 83a inner peripheral surface of light guide plate, 88 inner peripheral surface of housing, 90 third light source.

Claims (5)

At least part of the height direction is a luminaire that is housed in a hole in the ceiling.
A housing that opens on one side in the height direction,
A first light source which is arranged in the housing and whose circumference is covered with the inner peripheral surface of the housing and emits first light to one side region in the height direction.
A second light source located outside the inner peripheral surface in the radial direction and emitting a second light to the outer region in the radial direction.
An annular and plate-shaped light guide plate that extends in the radial direction, including an inner peripheral surface on which at least a part of the second light is incident,
A lighting device. A third light source that is arranged outside the inner peripheral surface of the housing and on the side opposite to the one side in the height direction of the second light source and emits a third light to the outer region in the radial direction. ,
A tubular diffusing member located outside the radial direction of the third light source, having a cylindrical shape, extending in the height direction, and diffusing at least a part of the third light.
The lighting device according to claim 1. The housing extends in the height direction, and is located on the first outer peripheral surface to which the second light source is attached, on the side opposite to the one side in the height direction from the first outer peripheral surface. In addition to extending in the height direction, the second outer peripheral surface to which the third light source is attached and the entire outer surface in the radial direction so as to separate the first outer peripheral surface and the second outer peripheral surface in the height direction. The lighting device according to claim 2, further comprising an integral annular partition wall portion including a flange extending over the circumference. The end surface of the flange on the third light source side in the height direction has an inclined surface located on one side in the height direction on the outside in the radial direction as it goes to the outside in the radial direction.
The lighting device according to claim 3, wherein the cylindrical diffusion member is located inside the inclined surface in the radial direction. The amount of light emitted by the second light source is larger than the amount of light emitted by the first light source, and the amount of light emitted by the first light source is the amount of light emitted by the third light source. The lighting device according to any one of claims 2 to 4, which is larger than the amount of light.

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