TW201537109A - Lighting device and ceiling board using the same - Google Patents

Abstract

The present invention pertains to an illumination device and a cabinet in which same is used, the purpose of the invention being to enable light source units to be easily replaced. In order to achieve this purpose, a light source unit (11) comprises: a light-emitting element (12) as a light source disposed facing a light-receiving face (7) of a light guide body (10); and a heat-dissipating body (13) holding the light-emitting element (12), at least a portion of the heat-dissipating body (13) being detachably fixed to a light guide body holding case (6). The heat-dissipating body (13) is provided with protrusions as light source unit replacement operation units (15) formed to protrude outward from the light guide body holding case (6) in a direction perpendicular to the lengthwise direction and the vertical direction of the light guide body holding case (6).

Description

Lighting device and ceiling using the same

The present invention relates generally to an illumination device and a ceiling using the same, and more particularly to an illumination device including a light guide having an elongated shape having an entrance surface and an exit surface, and a ceiling using the illumination device.

In recent years, the former has proposed an illumination device using a light guide, which is attracting attention. That is, the illumination device includes a light guide body having an elongated shape and an incident surface and an exit surface, and a light source unit having a light-emitting element that allows light to enter from the incident surface of the light guide.

In this configuration, by causing the light-emitting element to emit light, the light is first incident on the incident surface of the light guide body into the light guide body, and then travels inside the light guide body, and then exits from the exit surface to the light guide body ( For example, refer to the Japanese Licensed Open Publication No. 2013-12369).

As described above, since the illumination device uses a light guide having an elongated shape and an entrance surface and an exit surface, if the illumination device is mounted on a ceiling such as a bathroom, the entire bathroom can be illuminated by the elongated light guide.

In order to attach the illuminating device to the ceiling as in this manner, it is considered that the light guide body is housed in the light guide holder, and the light source unit is provided in the light source installation portion of the light guide holder. Composition.

In other words, when the illuminating device is installed in a ceiling such as a bathroom, the illuminating device is attached to the ceiling in a state where the upper body is ejected from the inspection opening provided on the ceiling of the bathroom to the rear of the ceiling. Therefore, as such an illuminating device, it is important to provide an integrated structure in which the light guide unit is housed in the light guide holder and the light source unit is provided in the light source installation portion of the light guide holder.

However, in the illuminating device provided as described above, for example, when the unit is replaced according to the service life of the light source unit, the above-described operation is performed in a state where the upper body is inspected from the inspection opening to the back of the ceiling. . Therefore, in the conventional lighting device, there is a problem that the operability is inferior when the light source unit is replaced.

Accordingly, an object of the present invention is to provide an illumination device that can easily replace a light source unit and a ceiling using the illumination device.

An illumination device according to the present invention includes: a light guide holder; the elongated body is formed of a thermally conductive material; the light guide is held in the light guide holder and has an elongated shape; and a light source unit. The light guide holding case has a slit-shaped light emitting portion formed along the longitudinal direction and a light source setting portion located at an end portion in the longitudinal direction. The light guide body has an incident surface at an end portion in the longitudinal direction, and has an emitting surface and a reflecting surface in the outer peripheral surface in the longitudinal direction. The light source unit is disposed in the light source setting portion of the light guide holding case. The light source unit is configured by a light-emitting element and a heat sink: the light-emitting element is disposed as a light source facing the incident surface of the light guide body; the heat sink body holds the light-emitting element, and at least a portion thereof is detachably attachable The method is fixed to the light guide holding case. The heat dissipating body includes a protruding portion as a light source unit replacement operation portion, and the protruding portion is oriented in a direction perpendicular to the longitudinal direction and the vertical direction of the light guide holding case, and is further oriented than the light guide holding case The outer side is formed to protrude.

The ceiling of the present invention includes the illumination device and the illumination opening. The illuminating device is provided on the ceiling back side such that the emitting surface of the light guiding body faces the lighting opening.

As described above, in the present invention, the heat sink includes a protruding portion as a light source unit replacement operation portion, and the protruding portion faces the direction perpendicular to the longitudinal direction and the vertical direction of the light guide holding case. The light body retains the housing to protrude further outward. Therefore, the replacement of the light-emitting elements can be easily performed.

In other words, the operator can hold the light source unit replacement operation portion when the light-emitting element is replaced, and the light source unit and the light-emitting element are simply detached from the light guide body holding case, so that the light source unit can be easily removed. The replacement of the light-emitting element is performed.

Further, in the heat dissipating body of the light source unit, the protruding portion is used as the light source unit to replace the operation portion, and thus the heat dissipating area of the heat dissipating body is also enlarged. As a result, heat dissipation of the light emitting element is appropriately performed, thereby prolonging The service life of the light-emitting element.

[Best Mode for Carrying Out the Invention]

(Embodiment 1) Hereinafter, Embodiment 1 will be described with reference to the drawings.

Fig. 1 shows, as an example, a bathroom having a ceiling 1, on which a lighting device 2 is mounted. Further, in the ceiling 1, an inspection opening 3 having a circular opening and leading to the back of the ceiling, a cover (not shown) for closing the inspection opening 3, and a slit-shaped illumination opening 3A are provided. When the illuminating device 2 is installed, the operator removes the cover and pushes the upper body from the inspection port 3 toward the back of the ceiling. In this state, as shown in FIG. 1, the illuminating device is installed in the illumination opening. Part 3A.

As shown in FIGS. 3 to 8 , the illuminating device 2 includes a light guide holder 6 that is formed in a long shape, a light guide 10 , and two light source units 11 (first light source unit 11 a and second light source unit). 11b). In the following description, the longitudinal direction of the illumination device 2 is referred to as a first direction. That is, the depth direction in FIG. 1 coincides with the first direction. Further, the vertical direction in FIG. 1 is referred to as a second direction. The second direction is consistent with the vertical direction. Then, the left-right direction in FIG. 1 is referred to as a third direction. The third direction coincides with the width direction of the illumination device 2 and is perpendicular to the first direction and the second direction. In the following description, the "inside of the first direction" means a direction from the both end sides in the first direction of the illumination device 2 toward the center side.

The light guide holding case 6 is formed into a rectangular tube having an elongated shape as a heat conductive material as shown in FIG. The longitudinal direction of the light guide holding case 6 coincides with the longitudinal direction of the illuminating device 2, that is, the first direction.

More specifically, the light guide holding case 6 has an opening at one of the first end faces and one of the second faces (the bottom face of FIG. 1 ), and is formed to be slightly U when viewed from the first direction. Glyph. The light guide body holds the lower portion of the casing 6 and is slit-shaped in the first direction (longitudinal direction of the light guide holder 6), and is configured as a light emitting portion 4 that emits light downward. Both ends of the light guide holder housing 6 in the first direction are configured as two light source installation portions 5 that respectively align the light sources (light-emitting elements 12) of the two light source units 11 to be described later.

The light guide body 10 is formed into an elongated tubular shape such as a prism which is slightly the same shape as the light guide holder case 6 and which is slightly smaller in size than the light guide body. The longitudinal direction of the light guide body 10 coincides with the longitudinal direction of the light guide holder 6 and the longitudinal direction of the illumination device 2, that is, coincides with the first direction. The light guide 10 is housed and held in the light guide holding case 6. The light guide body 10 has an incident surface 7 on both end faces in the first direction, and one of the end faces (the bottom surface of FIG. 1) in the second direction has an exit surface 8 having reflections on the outer peripheral surfaces other than the bottom faces Face 9. The illuminating device 2 is provided on the ceiling back side such that the exit surface 8 of the light guide 10 faces the illumination opening 3A.

As shown in FIGS. 3 to 8 , each of the light source units 11 includes one to a plurality of light-emitting elements 12 ( FIGS. 6 and 8 ) as a light source, a housing portion 30 that houses the light-emitting elements 12 , and a heat sink 13 .

The light-emitting element 12 of each light source unit 11 is, for example, a light-emitting diode, as understood from FIG. 6, the light-incident element 7 corresponding to the light-conducting body 10 and the corresponding light source setting portion of the light-guiding body holding case 6. 5 opposite configurations.

As shown in FIG. 8, each of the accommodating portions 30 is formed in an elongated rectangular box shape having at least one opening facing the incident surface 7 corresponding to the light guide 10. Each of the accommodating portions 30 is attached to a central portion of one surface facing the light guide body 10 in the first heat sink 13 to be described later. The light-emitting elements 12 of the light source units 11 are disposed in the corresponding housing portions 30, and the light of the light-emitting elements 12 is radiated from the one surface of the housing portion 30 having the opening to the light guide body 10.

Each of the heat radiating bodies 13 is formed in a slightly L-shape when viewed from the width direction (third direction) of the illumination device 2 by bending one metal plate, for example. Each of the heat radiating bodies 13 is configured to hold the light-emitting element 12, and at least a part thereof is detachably fixed to the light guide holder 6 in a detachable manner.

Specifically, each of the heat radiating bodies 13 is composed of a first sheet 13a and a second sheet 13b. The first sheet 13a is formed in a substantially rectangular plate shape, and the flat surface is disposed opposite to the corresponding incident surface 7 of the light guide body 10. The second sheet 13b is formed in a substantially rectangular plate shape and protrudes from the upper end of the first sheet 13a toward the inside in the first direction. On the other hand, as shown in FIG. 7, the second piece 13b (extended portion) corresponding to at least a part of each of the heat radiating bodies 13 is provided with a space S between the end portions of the light guide holding case 6 in the first direction. The state is extended inward in the upper portion of the end portion of the light guide holder 6.

Further, as shown in FIG. 8, the second piece 13b is composed of a flat portion 130, an inclined portion 131, and a front end portion 132: the flat portion 130 is parallel to the first direction; and the inclined portion 131 is formed from the front end of the flat portion 130. The lower end portion 132 is formed by bending obliquely downward, and the distal end portion 132 is formed to be curved so as to be parallel to the first direction from the front end of the inclined portion 131. That is, a height difference is provided between the flat portion 130 and the front end portion 132, whereby the space S is formed by a height difference. The distal end portion 132 includes a protruding piece 132a (extension portion) formed by a part of the front end edge projecting inward. The protruding piece 132a has a through hole 132b that penetrates in the vertical direction (second direction). The screw member 14 (an example of the fixture) shown in FIG. 6 is inserted through the through hole 132b, and is screwed into the screw hole 6a of the light guide holder housing 6 which is disposed at a position further inward than the end portion. The light source units 11 are detachably fixed to the light guide holder 6 in a detachable manner. Then, in this state, as shown in FIG. 3, the second piece 13b is oriented in a direction perpendicular to the longitudinal direction (first direction) and the vertical direction (second direction) of the light guide holder case 6. (the third direction) protrudes further outward than the light guide holder housing 6. In other words, when the light source unit 11 is mounted in the light guide holder 6 in the third direction of the distal end portion 132, the light guide holder 6 is viewed from the second direction. The manner of protruding further outward in the third direction is set to be larger than the width dimension of the light guide holder 6. In the present embodiment, the distal end portion 132 (projecting portion) is replaced with the operation unit 15 as a light source unit.

In this manner, the illuminating device in which the light guide holder housing 6, the light guide 10, and the two light source units 11 are integrated as shown in FIG. 3 is disposed on the ceiling back surface as shown in FIGS. 1 and 2 .

Further, as understood from FIG. 4 and FIG. 5, two mounting portions 16 (the first mounting portion 16a and the second mounting portion 16b) that are erected upward are provided on both sides of the illumination opening portion 3A of the ceiling 1. In other words, the two attachment portions 16a and 16b are formed to protrude from the left and right end edges (the both end edges in the third direction) of the illumination opening portion 3A in a rectangular plate shape upward. Further, each of the mounting portions 16 has a shape and a same size as the side surface of the light guide holder 6 as viewed in the third direction. In addition, the light guide holder 6 has a shape that is slightly the same as the illumination opening 3A of the ceiling 1 and is slightly smaller than the illumination opening 3A as viewed in the vertical direction (second direction).

Therefore, as shown in FIG. 3, the operator illuminates the light guide body holding the casing 6, the light guide 10, and the two light source units 11, and pushes up from the inspection port 3 toward the back of the ceiling. Next, the operator also injects the upper body from the inspection port 3 toward the back of the ceiling. In this state, the light guide holder 6 of the illumination device 2 is mounted in the illumination opening 3A.

At this time, each of the light source unit replacement operation units 15 of the illumination device 2 extends to the outside of the illumination opening portion 3A in the third direction. Therefore, even in a state where the illuminating device 2 is not screwed to the mounting portion 16 of the illumination opening portion 3A, the two light source unit replacement operation portions 15 are respectively hooked in the first direction of the illumination opening portion 3A. It is close to the edge portion on both end sides. Thereby, the illuminating device 2 does not have a problem that the lighting opening portion 3A is dropped into the bathroom.

In the state in which the two light source unit replacement operation portions 15 are hooked on the edge portion of the illumination opening portion 3A, as shown in FIG. 4, the screw member 17 is guided by the through hole 160b of the second mounting portion 16b. The order of the through hole 6b of the body holding case 6 and the through hole 160a of the first mounting portion 16a is sequentially passed through. Then, the illuminating device 2 is attached to the slit-shaped illumination opening portion 3A of the ceiling 1 by locking the distal end of the threaded member 17 to the nut 18.

Here, as described above, the illuminating device 2 includes the light guide holder 6 made of a thermally conductive material, the light guide 10, and the two light source units 11 (the first light source unit 11a and the second light source unit 11b). The light guide holder housing 6 has a light-emitting portion 4 that is elongated and slit-shaped in the longitudinal direction (first direction), and two light source installation portions 5 that are provided at both ends. The light guide 10 is held in the light guide holding case 6. The light guide body 10 has an incident surface 7 on both end faces in the first direction, and one of the end faces (the bottom surface of FIG. 1) in the second direction has an exit surface 8 having reflections on the outer peripheral surfaces other than the bottom faces Face 9. As shown in FIGS. 3 to 8 , each of the light source units 11 is disposed opposite to the light source installation portion 5 corresponding to the light guide holder 6 .

Therefore, the light emitted from the light-emitting elements 12 of the respective light source units 11 enters the incident surface 7 of the light guide body 10, and then travels in the longitudinal direction of the light guide body 10, and a part of the light is reflected by the reflection surface 9 or the like therein, and The exit surface 8 is ejected from below. In this manner, the light of the light-emitting element 12 is emitted from the slit-shaped light emitting portion 4 of the light guide holder 6 into the bathroom. Further, a light-transmitting cover (not shown) may be provided on the light-emitting portion 4 to cover the exit surface 8 of the light guide 10.

At this time, the entire light guide body 10 is elongated, and the light exit surface 8 of the light guide body 10 and the light exit portion 4 of the light guide holder 6 are also elongated, so that the bathroom is widely illuminated.

Further, in the present embodiment, when it is necessary to replace the light-emitting element 12 due to the service life or the like, the replacement of the components can be easily performed.

That is, as shown in FIG. 2 to FIG. 5, each of the heat radiating bodies 13 of the present embodiment is oriented in a direction perpendicular to the longitudinal direction (first direction) and the vertical direction (second direction) of the light guide holder case 6. (the third direction) protrudes further outward than the light guide holding case 6, and the protruding portion (front end portion 132) serves as a light source unit replacement operation portion 15.

Therefore, when the light-emitting element 12 is replaced, the light source unit replacement operation portion 15 that protrudes further outward than the light guide holder 6 can be held, and the light source unit 11 together with the light-emitting element 12 is collectively held from the light guide holder 6. Since it is simply removed, the replacement of the light-emitting element 12 can be easily performed.

In the present embodiment, in addition to the light source unit replacement operation unit 15, the following configuration is adopted so that these operations can be easily performed on the ceiling back surface. First, as shown in FIG. 7, the second piece 13b (extended portion) corresponding to at least a part of each of the heat radiating bodies 13 is provided with a space S between the end portions of the light guide holding case 6 in the first direction. The state is extended inwardly above the end portion of the light guide holding case 6. Then, the screw member 14 (an example of the fixture) shown in FIG. 6 is inserted into the through hole 132b, and is screwed into the screw hole 6a of the light guide holder housing 6 which is disposed at a position further inward than the end portion. The light source unit 11 is detachably fixed to the light guide holder 6 in a detachable manner.

That is, if the screw member 14 is removed from above and then the light source unit 11 is detached from above, the elements can be separated from the light guide holder 6.

In addition, since the light-emitting element 12 is energized on the surface of the first sheet 13a of the light source unit 11 opposite to the side on which the light-emitting element 12 is provided, the electric wire (not shown) is penetrated through the through hole of the first sheet 13a. Status setting (not shown). However, since the electric wires are thin, the operability is not deteriorated.

Further, as shown in FIGS. 6 and 7, a pair of concave portions 19 that open upward are provided at both ends in the first direction of the light guide holder case 6. On the other hand, in the accommodating portion 30 of each of the light source units 11, a pair of protrusions 20 that are inserted into the pair of recessed portions 19 from above and are locked thereto are provided. The pair of protrusions 20 protrude outward from each of the left and right side surfaces of each of the housing portions 30.

Specifically, the light guide holding case 6 has one of the pair of protruding pieces 6c protruding so as to be flush with both left and right side surfaces on one end side in the first direction. In the same manner, the light guide holder 6 is provided with one of the pair of protruding pieces 6c so as to be flush with the left and right side surfaces in the other end side in the first direction. When viewed from the width direction (third direction) of the illumination device 2, each of the protruding pieces 6c protrudes in a substantially L-shaped plate shape to form the concave portion 19.

Further, as shown in FIG. 7, each of the concave portions 19 is formed to open toward the corresponding light source unit 11 side. In other words, each of the protruding pieces 6c has an inclined surface 60 on the side facing the concave portion 19. The inclined surface 60 is inclined such that the width of the concave portion 19 in the first direction is wider as it goes upward.

Therefore, if the screw member 14 is removed, only the light source unit 11 is pushed upward, and the protrusion 20 can be simply removed from the recess 19, that is, the light source unit 11 and the light guide holder housing 6 can be simply Separation.

Further, after the light source unit 11 is removed and the light-emitting element 12 is replaced, when the light source unit 11 is pushed downward toward the light guide holder 6, the protrusion 20 is simply attached (locked) in the recess 19. That is, the light source unit 11 and the light guide holder housing 6 can be simply integrated.

Further, in the present embodiment, the heat radiating body 13 of each of the light source units 11 and the light guide holder 6 are formed of a metal together. Therefore, the heat dissipation effect of the light-emitting element 12 is high, whereby the life of the light-emitting element 12 can be extended.

Further, the heat radiating body 13 of the light source unit 11 is disposed in a direction (third direction) which is perpendicular to the longitudinal direction (first direction) and the vertical direction (second direction) of the light guide holder 6; The protruding portion (front end portion 132) is replaced with the operation unit 15 as a light source unit. Therefore, the heat dissipation area of the heat radiating body 13 is also enlarged. As a result, heat dissipation of the light-emitting element 12 is appropriately performed, whereby the life of the light-emitting element 12 can be extended. Further, in the present embodiment, at least a part of each of the heat radiating bodies 13 is extended inwardly above the end portion of the light guide holder case 6 in a state in which the space S is provided, so that heat from the light-emitting element 12 is caused. It is easy to escape above the space S, which improves the heat dissipation effect.

(Embodiment 2) Hereinafter, Embodiment 2 will be described with reference to Figs. 9 and 10 . The illuminating device 2 of the present embodiment shown in Figs. 9 and 10 includes a heat dissipating body 21 instead of the heat radiating body 13 of the light source unit 11 of the first embodiment, and the other portions have the same components as those of the illuminating device 2 of the first embodiment. . Therefore, the same components are denoted by the same reference numerals, and their description will be omitted.

The heat dissipating body 21 constituting each of the light source units 11 of the present embodiment has a square tube shape having an opening in the upper and lower sides, and a notch is provided on the surface of the light guide body holding case under the heat sink 21 having a square tube shape. twenty two.

The light guide body holds the end of the casing 6 and is disposed to face the inner wall of the radiator 21 via the notch 22. The end portion of the heat radiating body 21 opposed to the notch 22 (the bottom portion of the square tubular body 21a to be described later) is oriented in the longitudinal direction (first direction) and the vertical direction (the second direction) of the light guide holder 6; The portion protruding in the vertical direction (third direction) is the light source unit replacement operation portion 23.

Specifically, each of the heat radiating bodies 21 integrally includes a square tubular body 21a having an opening on the upper and lower sides, and an extension piece 21b formed by extending the outer side wall from the first direction of the square tubular body 21a downward; and a mounting piece 21c, the lower edge of the inner side wall in the first direction from the square tube 21a protrudes. The dimension of the square tube body 21a in the third direction is such that when the light source unit 11 is mounted in the light guide holder case 6, the third light guide holder 6 is viewed from the second direction. The manner in which the direction protrudes further outward is set to be larger than the width dimension of the light guide holder 6. The attachment piece 21c protrudes from the center in the left-right direction (third direction) of the lower edge, and is curved toward the inside in the first direction. The mounting piece 21c has a through hole (not shown) that penetrates the vertical direction (second direction).

Each of the accommodating portions 30 described in the first embodiment is provided in the extension piece 21b of the corresponding heat sink 21 in the present embodiment. The end portion of the light guide holder housing 6 in the first direction (that is, the light source installation portion 5) is disposed to face the light-emitting element 12 provided in the housing portion 30 of the extension piece 21b via the notch 22.

The light guide body holding case 6 and the heat sink 21 are formed of a metal plate. As shown in FIG. 10, the attachment piece 21c (extension portion) of the heat sink 21 is extended inward in the upper portion of the end portion of the light guide holder 6 in the first direction. The screw member 14 (an example of the fixture) shown in FIG. 10 is inserted into the through hole of the mounting piece 21c, and the screw hole of the light guide holder housing 6 disposed at an inner position closer to the end portion. 6a is screwed, whereby the light source unit 11 is detachably fixed to the light guide holding case 6.

In the present embodiment, when it is necessary to replace the light-emitting element 12 due to the service life or the like, the replacement of the components can be easily performed.

That is, as shown in FIGS. 9 and 10, the heat radiating body 21 is provided in a direction that is perpendicular to the longitudinal direction (first direction) and the vertical direction (second direction) of the light guide holder 6 (the The light source unit that protrudes in the three directions) replaces the operation portion 23 (the bottom of the square tube body 21a).

Therefore, when the light-emitting element 12 is replaced, the light source unit replacement operation portion 23 (the bottom portion of the square tube body 21a) protruding further outward than the light guide holder 6 in the third direction can be held, and the light source unit 11 can be self-contained. The light guide holding case 6 is simply removed. Therefore, the replacement of the light-emitting element 12 can be easily performed.

In the present embodiment, in addition to the light source unit replacement operation unit 23, as in the first embodiment, the following configuration is adopted so that the operations can be easily performed on the ceiling back surface.

First, as shown in FIG. 10, the attachment piece 21c (extension portion) of the radiator 21 is extended inward in the upper portion of the end portion of the light guide holder 6 in the first direction. Then, the screw member 14 (an example of the fixture) shown in FIG. 10 is inserted into the through hole of the mounting piece 21c, and is detachably fixed to the end portion of the light guide holder 6 in this arbitrarily detachable manner. The location of the party.

That is, if the screw member 14 is removed from above and then the light source unit 11 is detached from above, it can be separated from the light guide holder housing 6.

Further, since the light-emitting element 12 is energized on the surface of the extension piece 21b of the light source unit 11 opposite to the side on which the light-emitting element 12 is provided, an electric wire (not shown) is inserted through the through-hole of the extension piece 21b ( Status setting not shown). However, since the electric wires are thin, the operability is not deteriorated.

Further, in the same manner as in the first embodiment, a pair of concave portions 19 that open upward are provided at both end portions of the light guide holder casing 6 in the first direction. Also in the accommodating portion 30 of each of the light source units 11, as in the first embodiment, a pair of protrusions 20 that are inserted into the pair of recessed portions 19 from above are locked.

Further, in the same manner as in the first embodiment, each of the concave portions 19 has a shape that is opened toward the light source unit 11 side.

Therefore, if the screw member 14 is removed, only the light source unit 11 is pushed upward, and the protrusion 20 can be simply removed from the recess 19, that is, the light source unit 11 and the light guide holder housing 6 can be simply Separation.

Further, after the light source unit 11 is removed and the light-emitting element 12 is replaced, when the light source unit 11 is pushed downward toward the light guide holder 6, the protrusion 20 is simply attached (locked) in the recess 19. That is, the light source unit 11 and the light guide holder housing 6 can be simply integrated.

Further, in the present embodiment, the heat radiating body 21 of each of the light source units 11 and the light guide holder 6 are formed of a metal together. Therefore, the heat dissipation effect of the light-emitting element 12 is high, whereby the life of the light-emitting element 12 can be extended.

Further, the heat sink 21 of the light source unit 11 is disposed in a direction (third direction) which is perpendicular to the longitudinal direction (first direction) and the vertical direction (second direction) of the light guide holder 6; The protruding portion (the bottom of the square tubular body 21a) is replaced with the operating portion 23 as a light source unit. Therefore, the heat dissipation area of the heat radiating body 21 is also enlarged. As a result, heat dissipation of the light-emitting element 12 is appropriately performed, whereby the life of the light-emitting element 12 can be extended. Further, in the present embodiment, each of the heat radiating bodies 21 is formed in a square tube shape having an opening portion in the vertical direction. Therefore, heat from the light-emitting element 12 is easily dissipated upward through the opening portion, and the heat radiation effect is further enhanced.

As described above, the illuminating device 2 of the present invention includes: the light guide holder 6 having an elongated shape and formed of a thermally conductive material; and the light guide 10 held in the light guide holding case 6 and having an elongated shape; And the light source unit 11. The light guide holder housing 6 has a slit-shaped light-emitting portion 4 formed along the longitudinal direction and a light source installation portion 5 located at an end portion in the longitudinal direction. The light guide body 10 has an incident surface 7 at an end portion in the longitudinal direction, and has an exit surface 8 and a reflecting surface 9 on the outer peripheral surface in the longitudinal direction. The light source unit 11 is provided in the light source installation portion 5 of the light guide holder 6. The light source unit 11 is configured by the light-emitting element 12 and the heat sink 13 (or the heat sink 21). The former is disposed as a light source opposite to the incident surface 7 of the light guide 10; the latter holds the light-emitting element 12, and at least a part thereof is optional The loading and unloading manner is fixed to the light guide holding case 6. The heat radiating body 13 (or the heat radiating body 21) includes a protruding portion as the light source unit replacement operation portion 15 (or the light source unit replacement operation portion 23), and faces the longitudinal direction of the light guide holder 6 and the direction perpendicular to the vertical direction. It is formed to protrude further outward than the light guide holding case 6.

Therefore, when the light-emitting element 12 is replaced, the light source unit replacement operation portion 15 (or the light source unit replacement operation portion 23) that protrudes further outward than the light guide holder 6 can be held, and the light source unit 11 together with the light-emitting element 12 And the light guide holder 6 is simply detached. Therefore, the replacement of the light-emitting element 12 can be easily performed.

Further, since the protruding portion of the heat radiating body 13 (or the heat radiating body 21) is used as the light source unit replacement operation portion 15 (or the light source unit replacement operation portion 23), the heat radiation area of the heat radiating body 13 (or the heat radiating body 21) is also enlarged. As a result, heat dissipation of the light-emitting element 12 is appropriately performed, whereby the life of the light-emitting element 12 can be extended.

Therefore, the present invention is expected as an illumination device that is used everywhere.

In the illuminating device 2, it is preferable that the heat radiating body 13 (or the heat radiating body 21) of the light source unit 11 is provided with an extended portion extending along the top surface of the end portion of the light guide holder 6. In this case, it is preferable to fix the extension of the heat sink 13 (or the heat sink 21) to the light guide holder 6 by the fixture. Further, in the illuminating device 2, it is preferable to fix the extension of the heat radiating body 13 (or the heat radiating body 21) to the light guide holding case 6 by the screw member 14 as a fixing tool.

In the illuminating device 2, at least a part of the heat radiating body 13 constituting the light source unit 11 is preferably extended to the inside of the light guiding body holding case 6 in a state where the space S is provided at the end of the light guiding body holding case 6. . In this case, it is preferable to provide a protruding portion as the light source unit replacement operation portion 15 in a part of the extension.

In the illuminating device 2, the heat radiating body 21 constituting the light source unit 11 is preferably formed in a tubular shape having an opening in the upper and lower sides. In this case, a notch 22 is provided on the surface of the light guide holding case 6 below the heat sink 21. The end portion of the light guide holding case 6 is disposed to face the inner wall of the heat sink 21 via the notch 22. The protruding portion of the light source unit replacement operation portion 23 is an end portion of the heat radiator 21 opposed to the notch 22.

In the illuminating device 2, it is preferable to form the light guide holding case 6 and the heat radiating body 13 (or the heat radiating body 21) by a metal plate.

In the illuminating device 2, it is preferable that the end portion of the light guide holder 6 is provided, and a recess 19 that opens upward is provided. In this case, it is preferable that the light source unit 11 is provided with the protrusion 20 which is inserted into the recess 19 from above and is locked thereto. Further, in the illuminating device 2, it is preferable that the concave portion 19 is formed to open toward the light source unit 11 side.

Further, the ceiling 1 of the present invention includes the illumination device 2 and the illumination opening 3A. The illuminating device 2 is provided on the ceiling back side such that the exit surface 8 of the light guide 10 faces the illumination opening 3A.

In this ceiling 1, it is preferable to have an inspection port 3 leading to the back of the ceiling.

The present invention has been described above in terms of several preferred embodiments, but without departing from the spirit and scope of the invention, that is, without departing from the scope of the claims, various modifications and variations can be made by those skilled in the art. .

1‧‧‧ ceiling
10‧‧‧Light guide
11‧‧‧Light source unit
11a‧‧‧1st light source unit
11b‧‧‧2nd light source unit
12‧‧‧Lighting elements
13, 21‧‧‧ ‧ heat sink
13a‧‧‧1st
13b‧‧‧2nd
130‧‧‧flat
131‧‧‧ inclined section
132‧‧‧ front end
132a‧‧‧protrusion
132b‧‧‧through hole
14, 17‧‧ ‧ threaded parts
15, 23‧‧‧Light source unit replacement operation unit
16‧‧‧Installation Department
16a‧‧‧1st installation department
16b‧‧‧2nd Installation Department
160a, 160b‧‧‧through holes
18‧‧‧ nuts
19‧‧‧ recess
2‧‧‧Lighting device
20‧‧‧ Protrusion
21a‧‧‧ square tube
21b‧‧‧Extension
21c‧‧‧Installation
22‧‧‧ gap
3‧‧‧Check mouth
3A‧‧‧Lighting opening
30‧‧‧ Storage Department
4‧‧‧Lighting Department
5‧‧‧Light source setting department
6‧‧‧Light guide retaining housing
6a‧‧‧ screw holes
6b‧‧‧through holes
6c‧‧‧ highlights
60‧‧‧ sloped surface
7‧‧‧Incoming surface
8‧‧‧Outlet
9‧‧‧reflecting surface
S‧‧‧ Space

The best mode for carrying out the invention will be described in further detail. Other features and advantages of the present invention will be apparent from the following detailed description and drawings.

Fig. 1 is a perspective view showing a state in which the lighting device of the first embodiment is attached to a bathroom. Fig. 2 is a perspective view showing a rear surface portion of a ceiling of a lighting device and a bathroom according to the first embodiment. Fig. 3 is a perspective view showing the lighting device of the first embodiment. Fig. 4 is an enlarged perspective view showing an essential part of the lighting device of the first embodiment. Fig. 5 is an enlarged perspective view showing an essential part of the lighting device of the first embodiment. Fig. 6 is an enlarged perspective view showing an essential part of the lighting device of the first embodiment. Fig. 7 is an enlarged perspective view showing an essential part of the lighting device of the first embodiment. Fig. 8 is an enlarged perspective view showing an essential part of the lighting device of the first embodiment. Fig. 9 is a perspective view showing the illumination device of the second embodiment. Fig. 10 is an enlarged perspective view showing an essential part of the illumination device of the second embodiment.

2‧‧‧Lighting device

4‧‧‧Lighting Department

5‧‧‧Light source setting department

6‧‧‧Light guide retaining housing

6b‧‧‧through holes

7‧‧‧Incoming surface

8‧‧‧Outlet

9‧‧‧reflecting surface

10‧‧‧Light guide

11‧‧‧Light source unit

11a‧‧‧1st light source unit

11b‧‧‧2nd light source unit

13‧‧‧ Heat sink

13a‧‧‧1st

13b‧‧‧2nd

14‧‧‧Threaded parts

15‧‧‧Light source unit replacement operation unit

130‧‧‧flat

131‧‧‧ inclined section

132‧‧‧ front end

Claims (10)

An illumination device comprising: a light guide body holding housing having an elongated shape formed of a thermally conductive material; a light guide body elongated in the light guide body holding housing; and a light source unit; a light guide holding case having a slit-shaped light emitting portion formed along a longitudinal direction and a light source mounting portion located at an end portion in the longitudinal direction; the light guide body at the end in the longitudinal direction The portion has an incident surface, and has an exit surface and a reflective surface on the outer peripheral surface in the longitudinal direction; the light source unit is disposed in the light source setting portion of the light guide holder; the light source unit is a light emitting element and a heat dissipating body configured to face the incident direction of the light guide body as a light source; the heat dissipating body holds the light emitting element, and at least a portion thereof is detachably fixed to the light guide body The heat dissipating body includes a protruding portion as a light source unit replacement operation portion, and the protruding portion is held in a direction perpendicular to the longitudinal direction and the vertical direction of the light guide holder, and is held by the light guide body shell Projecting more toward the outside is formed. The illuminating device of claim 1, wherein the heat dissipating body of the light source unit is provided with an extension extending along a top surface of the end portion of the light guide holder, which is fixed by a fixture The extension of the heat sink is fixed to the light guide holding case. The illumination device of claim 2, wherein the extension of the heat sink is fixed to the light guide holder by a screw member of the fixture. The illuminating device of any one of claims 1 to 3, wherein at least a part of the heat radiating body constituting the light source unit is provided with a space between the end portion of the light guide body holding case The state is extended to the inside of the light guide holding case; and the protruding portion as the light source unit replacement operation portion is provided in the extended portion. The illuminating device according to any one of claims 1 to 3, wherein the heat dissipating body constituting the light source unit is formed in a tubular shape having an opening on the upper and lower sides; and the light guide is disposed under the heat dissipating body The surface of the body holding housing is provided with a notch; the end portion of the light guide holding housing is disposed to face the inner wall of the heat dissipating body through the notch; and the protruding portion of the operation unit as the light source unit The end of the heat sink opposite the notch. The illuminating device according to any one of claims 1 to 3, wherein the light guide holding case and the heat dissipation system are formed of a metal plate. The illuminating device according to any one of claims 1 to 3, wherein the end portion of the light guide holding case is provided with a concave portion that opens upward; and the light source unit is provided with the concave portion inserted from above And the protrusion of the recess is locked. The lighting device of claim 7, wherein the recess is formed to open toward the light source unit side. A illuminating device according to any one of claims 1 to 8 and an opening for illumination, characterized in that: the illuminating device is such that the exit surface of the light guide body and the illumination opening The way the part faces is placed on the back side of the ceiling. For example, the ceiling of the ninth application patent scope has an inspection port leading to the back of the ceiling.