JP6857869B2 - Lighting device - Google Patents

Description

The present disclosure relates to a lighting device.

In Patent Document 1, a ceiling-embedded type in which a space for accommodating a light emitting module for main lighting and a space for accommodating a light emitting module for indirect lighting are separated by a light-shielding wall erected in the main body of the apparatus. The lighting device is disclosed. In this lighting device, the light emitting module for indirect lighting is arranged in front of the light emitting surface of the light emitting module for main lighting. The light emitted from the light emitting module for indirect lighting is converted into a direction different from the irradiation direction of the light emitted from the light emitting module for main lighting by the light shielding wall.

Japanese Unexamined Patent Publication No. 2016-21308

By the way, in a ceiling-embedded lighting device provided with each light emitting module for main lighting and indirect lighting, it is an important issue to reduce the optical loss of indirect lighting light. The lighting device of Patent Document 1 has room for improvement in this respect.

The lighting device according to one aspect of the present disclosure is formed in a tubular shape having one end in the axial direction opened, and is inserted into an embedded hole in the ceiling with the opening facing downward, and inside the device main body. The first light emitting unit provided and the second light emitting unit provided outside the main body of the apparatus are provided, and the first light emitting unit has a first light emitting module and the second light emitting unit. Has a second light emitting module, and the apparatus main body has a shape that protrudes below the ceiling surface and diverges toward the opening, and the irradiation direction of the light emitted from the second light emitting module is defined as described above. The second light emitting module has a ceiling surface and a projecting portion in a direction along the ceiling surface, and the second light emitting module is formed between the ceiling surface and the projecting portion in a state where the device main body is inserted into the embedding hole. It is characterized in that it is provided in the space to be built.

According to the lighting device according to one aspect of the present disclosure, the distance from the second light emitting module to the emitting surface can be shortened, so that the optical loss of the light emitted from the second light emitting module can be reduced.

It is sectional drawing of the lighting apparatus which is an example of Embodiment. It is a perspective view which looked at the lighting apparatus which is an example of Embodiment from above. It is a perspective view which looked at the lighting apparatus which is an example of Embodiment from below. It is sectional drawing of the lighting apparatus which is an example of a reference example. It is sectional drawing of the lighting apparatus which is another example of a reference example. It is sectional drawing of the lighting apparatus which is another example of a reference example. It is sectional drawing of the lighting apparatus which is another example of a reference example.

Hereinafter, an example of the embodiment of the lighting device according to the present disclosure will be described in detail with reference to the drawings. Since the drawings referred to in the description of the embodiment are schematically described, the dimensional ratio of each component should be determined in consideration of the following description. In the present specification, the description of "abbreviated to" is intended to include not only completely parallel but also substantially parallel, when substantially parallel is described as an example.

Hereinafter, the lighting device 10 as an example of the embodiment will be described as being mounted on a horizontal ceiling 100 in a living room, but the lighting device 10 may be mounted on a ceiling inclined with respect to the horizontal direction and the vertical direction. It is possible. Further, the lighting device 10 can be attached to the ceiling of a corridor of a house, an entrance, a public facility such as a library, a commercial facility such as a department store, an office, a store, or the like. The ceiling to which the lighting device 10 is attached may be a portion that divides the upper part of the building space, and may be, for example, a ceiling such as an entrance porch or a terrace.

FIG. 1 is a cross-sectional view of the lighting device 10 and shows a state in which the lighting device 10 is mounted on the ceiling 100 (in FIG. 1, the mounting bracket 40 is not shown). FIG. 2 is a perspective view of the lighting device 10 as viewed from above, and FIG. 3 is a perspective view of the lighting device 10 as viewed from below. Note that FIG. 3 shows a state in which the translucent member 35 is removed.

As illustrated in FIGS. 1 to 3, the lighting device 10 is formed in a tubular shape having one end in the axial direction opened, and the device main body 11 is inserted into the embedded hole 103 of the ceiling 100 with the opening facing downward. To be equipped. Further, the lighting device 10 includes a main illumination light emitting unit 20 (first light emitting unit) having a first light emitting module 21 and an indirect illumination light emitting unit 30 (second light emitting unit) having a second light emitting module 31. To be equipped. The apparatus main body 11 has a shape that protrudes below the ceiling surface 101 and expands toward the opening, and the irradiation direction of the light emitted from the second light emitting module 31 of the indirect illumination light emitting unit 30 is set to the ceiling surface 101 and the ceiling surface 101. It has a protruding portion 12 that is oriented along the ceiling surface 101. The lighting device 10 includes a lighting device (not shown) that supplies electric power to each light emitting module of the main lighting light emitting unit 20 and the indirect lighting light emitting unit 30.

Here, the ceiling surface 101 means a surface of the ceiling 100 facing vertically downward. Further, the embedded hole 103 is a hole into which a part of the device main body 11 can be inserted, and is, for example, a substantially perfect circular through hole formed through the ceiling plate constituting the ceiling 100. The lighting device can be arranged on the ceiling 100, and an attic space 102 into which the device main body 11 can be inserted is formed. The diameter of the apparatus main body 11 is larger than the diameter of the embedding hole 103 in the protruding portion 12.

The lighting device 10 is a ceiling-embedded lighting device capable of irradiating a main lighting light that directly illuminates an indoor space and an indirect lighting light that illuminates at least one of the ceiling surface 101 and the upper part of the wall surface. The main illumination light is directly applied to the floor surface of the room, the desk surface, and the like. On the other hand, the indirect illumination light irradiates the ceiling surface 101 or the like, and the reflected light from the ceiling surface 101 or the like brightens the room. In the illuminating device 10, the main illumination light is emitted from the main illumination light emitting unit 20, and the indirect illumination light is emitted from the indirect illumination light emitting unit 30.

As will be described in detail later, the second light emitting module 31 of the indirect illumination light emitting unit 30 is formed in the space 50 formed between the ceiling surface 101 and the protruding portion 12 in a state where the device main body 11 is inserted into the embedded hole 103. It is provided.

The lighting device 10 is fixed to the ceiling 100 by using a mounting bracket 40 (see FIGS. 2 and 3) fixed to the device main body 11. The apparatus main body 11 is a tubular body having one end in the axial direction (hereinafter, may be referred to as “lower end”) open, and the tubular wall portion 13 and the other end in the axial direction (hereinafter, may be referred to as “upper end”). It has a top plate portion 14 formed on the surface. The mounting bracket 40 includes a plate-shaped base portion 41 fixed to the top plate portion 14, two arm portions 42 extending from the base portion 41, and two mounting springs 43 fixed to each arm portion 42. ing. The base portion 41 is fixed to the top plate portion 14 by using a fastening member 44 such as a screw.

The two arm portions 42 extend downward from the end of the base portion 41 and are arranged so as to face each other with the device main body 11 interposed therebetween. The two mounting springs 43 have a leaf spring structure, are fixed to the lower end of each arm portion 42, and extend in the horizontal direction. Then, the mounting spring 43 supports the lighting device 10 by contacting the periphery of the embedded hole 103 of the ceiling 100 in the attic space 102. The structure of the mounting bracket 40 is not particularly limited.

In the present embodiment, the entire main illumination light emitting unit 20 including the first light emitting module 21 is provided inside the device main body 11 in the upper part of the device main body 11 inserted into the ceiling space 102. Further, the entire indirect illumination light emitting unit 30 including the second light emitting module 31 is provided in the space 50 formed between the ceiling surface 101 and the protruding portion 12 in a state where the device main body 11 is inserted into the embedded hole 103. Has been done. It is possible to provide a part of the main illumination light emitting unit 20 outside the device main body 11.

Hereinafter, the device main body 11, the main illumination light emitting unit 20, and the indirect illumination light emitting unit 30 constituting the illumination device 10 will be described in detail.

The apparatus main body 11 is a tubular body that is internally irradiated with light for main illumination, and the internal space of the apparatus main body 11 constitutes a light guide path of the main illumination light emitting unit 20. It is preferable that the apparatus main body 11 is a cylindrical member having a substantially circular cross section perpendicular to the axial direction, and has a divergent shape in which the diameter gradually increases as it approaches the opening at the lower end. The tubular wall portion 13 of the apparatus main body 11 is curved so as to be convex inward of the apparatus main body 11 corresponding to the divergent shape. The top plate portion 14 formed at the upper end of the apparatus main body 11 has a substantially perfect circular shape in a plan view. A plurality of heat radiating fins may be provided on the outside of the device main body 11 as long as the installation of the indirect illumination light emitting unit 30 is not hindered. The device main body 11 is not limited to a cylindrical shape, and may be a tubular member having a rectangular cross section perpendicular to the axial direction.

The apparatus main body 11 is manufactured by pressing, spinning, or die-casting a metal material containing, for example, aluminum or iron as a main component. The first surface 13A of the tubular wall portion 13 facing the inside of the apparatus main body 11 functions as a reflecting surface of light emitted from the main illumination light emitting unit 20. A metal layer may be formed on the first surface 13A by vapor deposition, plating, sputtering or the like, or may be mirror-finished by polishing or the like in order to increase the light reflectance. Further, a white coating film containing a white pigment may be formed on the first surface 13A.

As described above, the device main body 11 has a protruding portion 12 that protrudes below the ceiling surface 101 and expands toward the opening. The protrusion 12 is formed over the entire circumference of the device main body 11. The device main body 11 has a large degree of diameter expansion at the protruding portion 12, and the closer to the lower end of the protruding portion 12, the larger the diameter of the apparatus main body 11 protrudes outward in the radial direction. That is, the diameter of the protruding portion 12 is larger at the lower part than at the upper part. Hereinafter, the radial outer end of the protrusion 12 is referred to as the “tip” of the protrusion 12, and the tip and its vicinity are referred to as the “tip”.

The tubular wall portion 13 is greatly curved at the protruding portion 12. The first surface 13A of the tubular wall portion 13 faces inward in the radial direction at the upper part of the apparatus main body 11, but faces vertically downward as it approaches the lower end (tip) of the protruding portion 12, and the tip of the protruding portion 12 The portion is substantially parallel to the ceiling surface 101. Further, the second surface 13B of the tubular wall portion 13 facing the outside of the apparatus main body 11 faces the ceiling surface 101 side as it approaches the tip of the protruding portion 12.

The projecting portion 12 is arranged with a gap between it and the ceiling surface 101. This gap serves as a space 50 in which the indirect illumination light emitting unit 30 is installed. The space 50 is a ring-shaped space formed along the circumferential direction of the device main body 11. In the present embodiment, since the tubular wall portion 13 of the apparatus main body 11 is largely curved at the protruding portion 12, the space 50 becomes wider as it approaches the tip of the protruding portion 12. The size of the space 50 _{can be enlarged or reduced by changing the protruding height h 12} of the protruding portion 12, the shape of the tubular wall portion 13, and the like.

The protruding portion 12 projects in the horizontal direction beyond the position corresponding directly below the second light emitting module 31. By projecting the protruding portion 12 in this way, it is possible to prevent the light of the second light emitting module 31 from being irradiated vertically downward like the main illumination light. The space 50 surrounded by the ceiling surface 101 and the protrusion 12 is open to the outside in the radial direction of the protrusion 12 over the entire circumference of the protrusion 12. Therefore, the light of the second light emitting module 31 is emitted outward in the radial direction from the entire circumference of the protruding portion 12, and is irradiated to at least one of the ceiling surface 101 and the upper part of the wall surface.

That is, the light emitted from the second light emitting module 31 is regulated in the irradiation direction by the protruding portion 12 of the apparatus main body 11 in the direction along the ceiling surface 101 and the ceiling surface 101, and is indirectly illuminated on the ceiling surface 101 and the like. It becomes light. On the other hand, the light emitted from the first light emitting module 21 is not blocked by the projecting portion 12, so that it becomes the main illumination light emitted vertically downward.

The device main body 11 preferably has an overhanging portion 15 formed on the upper portion of the protruding portion 12. In the overhanging portion 15, the second surface 13B of the tubular wall portion 13 (hereinafter, the second surface 13B of the tubular wall portion 13 in the protruding portion 12 may be referred to as “the second surface 13B of the protruding portion 12”) is radially outside. It is a portion overhanging and is formed in a ring shape over the entire circumference of the device main body 11.

The projecting portion 12 may be formed with a support column 16 (see FIG. 3) used for fixing the flange portion 34, which will be described later. The support columns 16 are portions in which the second surface 13B of the protruding portion 12 projects radially outward below the protruding portion 15, and a plurality of columns 16 are formed along the circumferential direction of the protruding portion 12. When a plurality of columns 16 are present, it is preferable to form the columns 16 at at least three positions separated from each other in the circumferential direction of the protrusion 12.

The protrusion 12 may be formed with a groove 17 used for fixing the translucent member 35, which will be described later. The groove 17 is formed on the second surface 13B of the tubular wall portion 13 on the radial outer side of the protruding portion 12 with respect to the portion directly below the second light emitting module 31. Preferably, a groove 17 is formed at the tip of the protrusion 12 over the entire circumference of the protrusion 12. The groove 17 may be provided with a packing 18 for closing the gap between the projecting portion 12 and the translucent member 35.

As described above, the lighting device 10 includes a main lighting light emitting unit 20 including a first light emitting module 21 for main lighting that emits light inside the device main body 11, and an indirect lighting unit provided outside the device main body 11. The indirect illumination light emitting unit 30 including the second light emitting module 31 of the above is provided.

In addition to the first light emitting module 21, the main illumination light emitting unit 20 preferably includes a holder 24 for holding the first light emitting module 21 and a cover 25 engaged with the holder 24. In the present embodiment, since the first light emitting module 21 is arranged inside the device main body 11, the lead wire connected to the lighting device is drawn into the device main body 11. For example, the top plate portion 14 of the apparatus main body 11 is formed with a through hole through which a lead wire is inserted.

The first light emitting module 21 has a first light emitting element 22 mounted on the first substrate 23. A suitable first light emitting element 22 is a semiconductor light emitting element, and among them, an LED (Light Emitting Diode) is preferable. The first light emitting module 21 uses, for example, a phosphor to convert a part of the blue light of the LED into light having a longer wavelength, and mixes the color with the remaining part of the blue light to emit white light. Hereinafter, the first light emitting element 22 will be an LED.

The holder 24 has a bottomed cylindrical shape having an opening formed in the center of the bottom portion, and is fixed to the top plate portion 14 of the apparatus main body 11 by using a screw (not shown). The first light emitting module 21 is arranged in the holder 24 so that the surface of the first substrate 23 on which the first light emitting element 22 is mounted faces downward so that the light is irradiated through the opening at the center of the bottom.

The cover 25 has a bottomed cylindrical shape that can accommodate the holder 24. The cover 25 may be a transparent member, but is preferably a milky white resin translucent member containing a filler or void for light diffusion. The cover 25 has a function of protecting the first light emitting module 21 and diffusing and transmitting the light emitted from the first light emitting module 21. Alternatively, the cover 25 may be a transparent member and may have a lens function of forming light on the incident surface and the exit surface of the cover 25.

The light emitted from the main illumination light emitting unit 20 becomes the main illumination light emitted downward from the opening of the apparatus main body 11. In the lighting device 10, the surface along the opening of the device main body 11 is the emission surface of the main illumination light. A part of the light emitted from the main illumination light emitting unit 20 is reflected by the first surface 13A of the tubular wall portion 13 and then emitted from the emitting surface to the outside of the device.

In the present embodiment, the region (tip region) corresponding to the tip of the protruding portion 12 of the first surface 13A of the cylinder wall portion 13 is substantially parallel to the ceiling surface 101, so that the tip region of the first surface 13A is , The light of the main illumination light emitting unit 20 is not irradiated. Therefore, when the main illumination light is irradiated, the tip region of the first surface 13A and the peripheral region of the illumination device 10 which is shadowed by the protruding portion 12 of the ceiling surface 101 and is not irradiated with the light are formed as a series of dark areas. It looks connected. In this case, the effect of making it difficult to feel the protrusion of the protruding portion 12 can be obtained.

In addition to the second light emitting module 31, the indirect illumination light emitting unit 30 has a flange portion 34 provided along the ceiling surface 101 and a light transmitting unit provided outside the device main body 11 in the radial direction with respect to the second light emitting module 31. It is preferable to include the member 35. The lead wire connected to the lighting device is drawn into the space 50 through, for example, the embedded hole 103 of the ceiling 100, and is connected to the second light emitting module 31.

As described above, the indirect illumination light emitting unit 30 is installed in the ring-shaped space 50 in which the entire light emitting unit including the second light emitting module 31 is surrounded by the ceiling surface 101 and the protruding portion 12. Since the space 50 is open to the outside in the radial direction of the protrusion 12 over the entire circumference of the protrusion 12, the light of the second light emitting module 31 is emitted from the entire circumference of the protrusion 12 and corresponds to the tip of the protrusion 12. An emission surface of indirect illumination light is formed at the position. In the present embodiment, the surface of the translucent member 35 facing outward in the radial direction is the emission surface of the indirect illumination light.

According to the lighting device 10, by providing the second light emitting module 31 under the ceiling surface 101, the light is emitted from the second light emitting module 31 as compared with the case where the second light emitting module 31 is arranged above the device main body 11, for example. The distance to the surface can be significantly shortened. Therefore, it is possible to reduce the optical loss of the indirect illumination light. Further, the heat dissipation of the second light emitting module 31 is better than that in the case where the module is arranged in the ceiling space 102. Further, since the first light emitting module 21 and the second light emitting module 31 are arranged apart from each other, there is an advantage that the thermal influence of each other is small.

The second light emitting module 31 has a second light emitting element 32 mounted on the second substrate 33. The suitable second light emitting element 32 is a semiconductor light emitting element like the first light emitting element 22, and the LED is particularly preferable. The second light emitting module 31 also emits white light by converting a part of the blue light of the LED into light having a longer wavelength by using, for example, a phosphor and mixing the color with the remaining part of the blue light. Hereinafter, the second light emitting element 32 will be an LED.

The second light emitting module 31 is provided along the circumferential direction of the apparatus main body 11. Preferably, the second light emitting module 31 is provided over the entire circumference of the apparatus main body 11, in other words, over the entire circumference of the space 50. The second light emitting element 32, which is an LED, is mounted on, for example, a hollow disk-shaped second substrate 33, and a plurality of the second light emitting elements 32 are provided side by side in the circumferential direction of the apparatus main body 11. It is preferable that the second light emitting elements 32 are arranged at substantially constant intervals in the circumferential direction of the device main body 11. In this case, it becomes easy to irradiate the periphery of the illumination device 10 with uniform indirect illumination light.

The brightness of the indirect illumination light emitted from the indirect illumination light emitting unit 30 may be equal to or higher than the brightness of the main illumination light emitted from the main illumination light emitting unit 20. For example, the maximum luminous flux of the indirect illumination light emitting unit 30 is equal to or greater than the maximum luminous flux of the main illumination light emitting unit 20. That is, the maximum luminous flux of the indirect illumination light emitting unit 30 obtained by the light emission of the second light emitting module 31 is equal to or greater than the maximum luminous flux of the main illumination light emitting unit 20 obtained by the light emission of the first light emitting module 21. .. The conventional lighting device is designed so that the brightness of the indirect lighting light is suppressed compared to the brightness of the main lighting light, but the lighting device 10 strongly illuminates at least one of the ceiling surface 101 and the upper part of the wall surface with the indirect lighting device, and is indirect. It may be configured to brighten the entire room with illumination light. A lighting device (not shown) that supplies electric power to each light emitting module may have a dimming function.

Here, the maximum luminous flux means the luminous flux when the output of each light emitting module is maximized. The luminous flux of each light emitting unit is measured using an integrating sphere or a goniometer and an illuminometer.

The illuminating device 10 can irradiate the main illumination light and the indirect illumination light at the same time, but it is generally assumed that the main illumination light and the indirect illumination light are switched and used. Therefore, the lighting device 10 may be configured so that the first light emitting module 21 and the second light emitting module 31 do not emit light at the same time.

The flange portion 34 constituting the indirect illumination light emitting portion 30 is a portion of the space 50 that projects outward in the radial direction of the apparatus main body 11. However, it is preferable that the flange portion 34 is provided on the device main body 11 so as not to project radially outward from the tip of the protruding portion 12. The collar portion 34 is provided along the circumferential direction of the apparatus main body 11. Preferably, the collar portion 34 is provided over the entire circumference of the apparatus main body 11, in other words, over the entire circumference of the space 50.

In the present embodiment, the second light emitting module 31 is attached to the lower surface 34A of the collar portion 34 facing the protruding portion 12 side. Since the portion of the lower surface 34A to which the second light emitting module 31 is attached is flat, the second light emitting module 31 can be easily attached. The second light emitting module 31 has a flange portion 34 using a fastening member 36 such as a screw (see FIGS. 2 and 3) with the surface of the second substrate 33 on which the second light emitting element 32 mounted is facing downward. Can be fixed to. The second light emitting module 31 is fixed in the radial direction away from the outer peripheral portion of the flange portion 34 so as not to interfere with the translucent member 35.

The collar portion 34 is preferably arranged close to the ceiling surface 101. The flange portion 34 is provided, for example, by fitting and fixing a hollow disk-shaped member similar to the second substrate 33 to the apparatus main body 11 from the top plate portion 14 side. The collar portion 34 is placed on the support column 16 of the device main body 11 and fixed to the support column 16 by using a fastening member 37 (see FIG. 2) such as a screw. The second light emitting module 31 fixed to the lower surface 34A of the flange portion 34 is arranged substantially parallel to the ceiling surface 101 and faces the second surface 13B of the protruding portion 12 with a predetermined gap.

When the second light emitting module 31 is fixed to the lower surface 34A of the flange portion 34, the surface of the protruding portion 12 facing the ceiling surface 101 side, that is, the second surface 13B facing the second light emitting module 31 is the second light emitting module. It functions as a reflecting surface of light emitted from 31. The light emitted from the second light emitting module 31 is reflected by, for example, the curved second surface 13B, and is emitted in the horizontal direction from the entire circumference of the protruding portion 12. Similar to the first surface 13A, a metal film may be formed on the portion of the second surface 13B that functions as a reflective surface, or the second surface 13B may be mirror-finished by polishing or the like. Moreover, a white coating film may be formed.

In the present embodiment, a recess 38 is formed between the upper surface 34B of the collar portion 34 facing the ceiling surface 101 side and the ceiling surface 101 to avoid interference between the fastening members 36 and 37 and the ceiling surface 101. .. A step is formed in the flange portion 34 between the portion where the second light emitting module 31 is fixed and the outer peripheral portion, and the height of the upper surface 34B is lowered at the portion where the second light emitting module 31 is fixed. There is. Therefore, a recess 38 is formed between the upper surface 34B and the ceiling surface 101 of the portion where the second light emitting module 31 is fixed.

The translucent member 35 constituting the indirect illumination light emitting unit 30 is provided in the space 50 on the radial side of the device main body 11 with respect to the second light emitting module 31, and transmits or diffuses the light emitted from the second light emitting module 31. It is a member that allows transmission. Further, the translucent member 35 functions as a cover for protecting the second light emitting module 31.

The light transmitting member 35 is a cylindrical member having a diameter substantially equal to the maximum diameter of the protruding portion 12, and is preferably fixed to the tip end portion of the protruding portion 12. In the present embodiment, the lower end portion of the translucent member 35 is inserted into the groove 17 of the protruding portion 12, and the upper end portion of the translucent member 35 is pressed from above by the flange portion 34. That is, the translucent member 35 is sandwiched between the flange portion 34 and the projecting portion 12.

A recess 51 that supports the flange portion 34 is formed at the upper end portion of the translucent member 35. The light transmitting member 35 is provided between the protruding portion 12 and the flange portion 34 over the entire circumference of the protruding portion 12. That is, the space in which the second light emitting module 31 is installed, which is surrounded by the protruding portion 12 and the flange portion 34, is closed by the translucent member 35. Further, the axial length of the translucent member 35 corresponds to the length from the ceiling surface 101 to the second surface 13B at the tip of the protruding portion 12. Therefore, in the lighting device 10, the upper end of the translucent member 35 and a part of the flange portion 34 come into contact with the ceiling surface 101. In order to close the gap between the lighting device 10 and the ceiling surface 101, packing may be inserted at the upper end of the translucent member 35 and between the flange portion 34 and the ceiling surface 101.

The light transmitting member 35 may be a transparent member that transmits the light of the second light emitting module 31 without diffusing it, or may be a milky white member that diffuses and transmits the light of the second light emitting module 31. As the milky white member that diffuses and transmits light, a resin-made translucent member containing a filler or void for light diffusion can be used as in the case of the cover 25.

When the diffusion transmission type translucent member 35 is used, the second surface 13B that reflects the light of the second light emitting module 31 may be a specular reflection surface. Alternatively, a transparent translucent member 35 may be used to use the second surface 13B as a diffuse reflection surface. In either case, the bright spot can be eliminated by using the indirect illumination light transmitted through the translucent member 35 as diffused light. On the other hand, the second surface 13B may be a specular reflection surface, and a transparent translucent member 35 may be used. In this case, since the light of the second light emitting module 31 reaches a long distance, for example, the wall surface of the room can be brightly illuminated.

Hereinafter, the lighting devices 60, 70, 80, 90, which are other examples of the reference example , will be described with reference to FIGS. 4 to 7. 4 to 7 are cross-sectional views corresponding to FIG. 1, but are simplified from FIG. In the following, the same reference numerals will be used for the same components as those in the above-described embodiment, and duplicate description will be omitted, and the differences from the above-described embodiment will be mainly described. It is assumed from the beginning that the components of the plurality of embodiments described in the present specification are selectively combined.

As illustrated in FIG. 4, the indirect illumination light emitting unit 61 of the illumination device 60 includes the second light emitting module 31, the collar portion 34, and the translucent member 35, and the indirect illumination light emitting unit 30 of the illumination device 10 is provided. In common with. The second light emitting module 31, the flange portion 34, and the translucent member 35 are preferably provided over the entire circumference of the apparatus main body 11 (the same applies to the following reference examples).

On the other hand, the indirect illumination light emitting unit 61 is different from the indirect illumination light emitting unit 30 in that the second light emitting module 31 is attached to the second surface 13B of the projecting portion 12 facing the ceiling surface 101 side. When the second light emitting module 31 is attached to the second surface 13B, the second light emitting element 32 is not directly viewed, and the glare feeling is easily reduced. Further, since the second light emitting element 32 faces the ceiling surface 101 side, it is possible to illuminate the ceiling surface 101 brightly.

In the indirect illumination light emitting unit 61, the lower surface 34A of the flange portion 34 functions as a reflecting surface of light emitted from the second light emitting module 31. In this case, in order to suppress the feeling of glare, it is preferable that the lower surface 34A of the flange portion 34 has a diffuse reflection function or the light transmitting member 35 has a diffuse transmission function. In the example shown in FIG. 4, a pedestal portion 62 having a flat surface is provided on the second surface 13B of the protruding portion 12 as a portion for fixing the second light emitting module 31. A flexible substrate may be applied to the second light emitting module 31, and the second light emitting module 31 may be attached in a curved state along the second surface 13B.

As illustrated in FIG. 5, the indirect illumination light emitting unit 71 of the illumination device 70 is provided with the second light emitting module 31 facing outward in the radial direction of the apparatus main body 11, and is indirect of the illumination device 10. It is different from the illumination light emitting unit 30. The second light emitting module 31 is arranged in the space 50 with the surface of the second substrate 33 on which the second light emitting element 32 is mounted facing outward in the radial direction of the apparatus main body 11. In this case, most of the light emitted from the second light emitting module 31 is transmitted through the light transmitting member 35 without going through the reflection process, so that the optical loss can be further reduced. A flexible substrate may be applied to the second light emitting module 31.

In the example shown in FIG. 5, the second light emitting module 31 is fixed to the standing wall portion 72 erected on the second surface 13B of the protruding portion 12. The vertical wall portion 72 is preferably formed substantially perpendicular to the ceiling surface 101 and over the entire circumference of the protruding portion 12. Although the vertical wall portion 72 is integrally molded with the apparatus main body 11 as a part of the apparatus main body 11, it may be provided on the flange portion 34, and is composed of the apparatus main body 11 and a member different from the flange portion 34. May be good.

As illustrated in FIG. 6, the indirect illumination light emitting unit 81 of the illumination device 80 includes an indirect illumination of the illumination device 10 in that it includes a light guide tube 84 that guides the light of the second light emitting element 83 to the entire circumference of the space 50. It is different from the light emitting unit 30. By using the light guide tube 84, even if the number of the second light emitting elements 83 is small, uniform indirect illumination light can be emitted over the entire circumference of the protruding portion 12. It is also possible to form the second light emitting module 82 with one second light emitting element 83 and one light guide tube 84. A surface light source such as an organic EL may be used as the second light emitting module.

As illustrated in FIG. 7, the indirect illumination light emitting unit 91 of the illumination device 90 includes a phosphorescent layer 92 formed on the second surface 13B of the protruding portion 12 to which the light of the second light emitting module 31 is irradiated. , Different from the indirect illumination light emitting unit 30 of the illumination device 10. The phosphorescent layer 92 can be provided by forming a coating film containing a phosphorescent material on the second surface 13B or by attaching a sheet containing the phosphorescent material. In this case, the phosphorescence layer 92 emits light, so that the uniformity of the indirect illumination light can be improved. Further, by emitting light from the phosphorescent layer 92, it is possible to secure the light even when the light is turned off.

As an embodiment of the lighting device, the case where the second light emitting module 31 is annular is illustrated, but the shape is not limited to the annular shape. For example, when a rectangular embedded hole 103 is formed in the ceiling 100, the lighting device 10 may be rectangular and the second light emitting module 31 may be rectangular annular. In this case as well, the same effect as the above configuration can be obtained.

10, 60, 70, 80, 90 Lighting device, 11 device body, 12 protruding part, 13 cylinder wall part, 13A first surface, 13B second surface, 14 top plate part, 15 overhanging part, 16 columns, 17 grooves, 18 Packing, 20 Main illumination light emitting unit, 21 1st light emitting module, 22 1st light emitting element, 23 1st substrate, 24 holder, 25 cover, 30, 61, 71, 81, 91 Indirect illumination light emitting unit, 31, 82 2nd light emitting module, 32, 83 2nd light emitting element, 33 2nd substrate, 34 flange part, 35 translucent member, 36, 37, 44 fastening member, 38, 51 recess, 40 mounting bracket, 41 base part, 42 Arm part, 43 mounting spring, 50 space, 51 recess, 72 standing wall part, 84 light guide tube, 92 phosphorescent layer, 100 ceiling, 101 ceiling surface, 102 ceiling space, 103 embedded hole

Claims (5)

A device body that is formed in a tubular shape with one end in the axial direction open and is inserted into an embedded hole in the ceiling with the opening facing downward.
A first light emitting unit provided inside the main body of the device and
A second light emitting unit provided outside the main body of the device and
With
The first light emitting unit has a first light emitting module.
The second light emitting unit has a second light emitting module.
The apparatus main body has a shape that protrudes below the ceiling surface and diverges toward the opening, and the irradiation direction of the light emitted from the second light emitting module is the direction along the ceiling surface and the ceiling surface. Has a protruding part
The second light emitting module is provided in a space formed between the ceiling surface and the protruding portion in a state where the device main body is inserted into the embedded hole .
A collar portion provided along the circumferential direction of the apparatus main body is provided in the space formed between the ceiling surface and the protruding portion.
The second light emitting module is attached to the lower surface of the collar portion, and is attached to the lower surface of the collar portion.
A lighting device in which a surface of the protruding portion facing the ceiling surface side functions as a reflecting surface of light emitted from the second light emitting module. In the space formed between the ceiling surface and the projecting portion, the light emitted from the second light emitting module is transmitted or diffused and transmitted, which is provided outside the device main body in the radial direction with respect to the second light emitting module. The lighting device according to claim 1, further comprising a translucent member. The lighting device according to any one of claims 1 to 2 , wherein the maximum luminous flux of the second light emitting unit is equal to or greater than the maximum luminous flux of the first light emitting unit. The lighting device according to any one of claims 1 to 3 , wherein the second light emitting module is provided along the circumferential direction of the device main body. The second light emitting module includes a semiconductor light emitting element.
The lighting device according to any one of claims 1 to 4 , wherein a plurality of the semiconductor light emitting elements of the second light emitting module are provided side by side in the circumferential direction of the device main body.

Images