JP2012074216A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system which can reduce a non-light-emitting part in a lighting state.SOLUTION: The lighting system 100 has a chassis 1 installed on a ceiling or the like and the chassis 1 has a translucent cover 7 of disk-shape fitted. A center plate 8 is installed at the center part of the translucent cover 7, and a center cover 9 can be installed detachably on the center plate 8. The center cover 9 includes a disk-shape reflecting plate 19 and a reflection cover 29. The center cover 9 is installed annexed to the center plate 8. The center cover 9 has a reflecting plate 19 arranged opposed to the center plate 8 and, furthermore, has the reflecting cover 29 arranged opposed to the reflecting plate 19 on the opposite side of the center plate 8. The reflection cover 29 has a reflecting dot pattern formed on a face opposed to the reflecting plate 19.

Description

  The present invention relates to an illuminating device including a translucent part that transmits light from a light source.

  2. Description of the Related Art Conventionally, an illumination device for indoor use has a light source such as an incandescent bulb and a fluorescent lamp. On the other hand, in recent years, with the increase in the brightness of light emitting diodes (LEDs), instead of light sources such as incandescent bulbs and fluorescent lamps, LEDs having characteristics such as low power consumption and long life have been used as light sources for lighting devices. It is becoming.

  Patent Document 1 discloses an illumination device in which an LED that is a light source and a power supply circuit that supplies power to the LED are arranged in parallel on the bottom surface of the housing.

JP 2009-206062 A

  However, in the lighting device of Patent Document 1, the bottom surface of the housing is divided into three parts, a diffusion plate that diffuses light is provided in two light emitting units provided with LEDs, and power is supplied to the LEDs between the two light emitting units. A housing portion for housing a power supply circuit for supplying the power is provided. For this reason, when the lighting device is turned on, the diffuser plate emits light and emits light, but there is a non-light emitting portion that does not emit light in the portion sandwiched between the diffuser plates, so the user feels uncomfortable in the lighting state was there.

  This invention is made | formed in view of such a situation, and it aims at providing the illuminating device which can reduce the non-light-emitting part in a lighting state.

  The illuminating device according to the present invention is an illuminating device including a non-light-emitting portion on a light-transmitting portion side that transmits light from a light source and emits light, and is positioned on the front surface of the non-light-emitting portion. And a light guide member that emits light by guiding the light.

  In the present invention, there is provided a light guide member that includes a non-light-emitting portion on the light-transmitting portion side that transmits light from the light source and emits light, and is positioned in front of the non-light-emitting portion and guides light from the light source to emit light. Prepare. Thereby, since light can be radiated | emitted from a light guide member, the non-light-emitting part in the lighting state of an illuminating device can be reduced.

  The lighting device according to the present invention includes a lighting device body that partitions and accommodates a built-in component such as a power supply circuit and a light source, a translucent portion that transmits light from the light source and emits light, and a front surface of the built-in component. And a light guide member that is arranged in parallel with the light transmitting portion and guides light from the light source to emit light.

  In the present invention, the lighting device main body that partitions and accommodates the built-in components such as the power supply circuit and the light source, the translucent portion that transmits light from the light source and emits light, and the front of the built-in components And a light guide member that is arranged in parallel with the light transmitting part and guides light from the light source to emit light. Thereby, since light can be radiated | emitted from a light guide member, the non-light-emitting part in the lighting state of an illuminating device can be reduced.

  In the illumination device according to the present invention, the light guide member is provided with a first reflection portion that reflects light and emits the light to the outside of the light guide member, and the first reflection portion is provided with a dot pattern. And a second reflecting portion.

  In the present invention, the light guide member includes a first reflection part that reflects light and emits it to the outside of the light guide member, and a second reflection part that is provided opposite to the first reflection part and has a dot pattern attached thereto. A reflection portion. In the dot pattern, for example, a concave portion may be formed on the surface of the second reflective portion, or a reflective paint may be printed on the surface. When the light is guided into the second reflecting part, the light travels inside the second reflecting part. Of the traveling light, the light reflected by the dot pattern is radiated from the surface opposite to the surface to which the dot pattern is attached to the outside of the second reflecting portion. Of the light traveling inside the second reflecting portion, the light that has passed through the second reflecting portion without being reflected by the dot pattern is reflected by the first reflecting portion, and is incident on the second reflecting portion again. After that, the light is emitted from the surface opposite to the surface to which the dot pattern is attached to the outside of the second reflecting portion. By forming the dot pattern, it is possible to prevent the light from the light source from being absorbed inside the light guide member and not radiated to the outside, and to guide the light from the light source to the entire light guide member and radiate it to the outside. it can.

  The illumination device according to the present invention is characterized in that the density of the dot pattern increases as the distance from the light source increases.

  In the present invention, the density of the dot pattern increases as the distance from the light source increases. The higher the dot pattern density is, the more light is reflected, so the amount of reflected light increases as the distance from the light source increases. On the other hand, since the amount of light attenuates as the light from the light source travels inside the second reflecting portion, the light emitted from the second reflecting portion can be made uniform by increasing the dot pattern density. .

  The illumination device according to the present invention is characterized in that the area of the dot pattern becomes wider as the distance from the light source increases.

  In the present invention, the area of the dot pattern increases as the distance from the light source increases. The larger the dot pattern area, the more light is reflected, so the amount of reflected light increases as the distance from the light source increases. On the other hand, since the amount of light attenuates as the light from the light source travels inside the second reflecting portion, the light emitted from the second reflecting portion can be made uniform by increasing the area of the dot pattern.

  The illuminating device according to the present invention is characterized in that an end portion of the light guide member into which light is incident is in close contact with the light transmitting portion.

  In this invention, the edge part of the light guide member is stuck to the translucent part. Thereby, it can prevent that the location which does not light-emit between the light guide member and the translucent part arises, and the discomfort of a lighting state can be further eliminated.

  The illumination device according to the present invention is characterized in that the end portion in close contact with the light transmitting portion is mirror-finished.

  In the present invention, the end portion that is in close contact with the light transmitting portion of the light guide member is mirror-finished. Thereby, the quantity of the light taken in inside a light guide member (2nd reflection part) can be increased, and the emitted light amount from a light guide member can be increased.

  The illumination device according to the present invention is characterized in that the light source includes an auxiliary light source provided to face an end portion of the light guide member on which light enters.

  In the present invention, the light source includes an auxiliary light source provided to face the end portion of the light guide member on which light is incident, whereby the light emission amount from the light guide member can be set to a desired value. . For example, the amount of light emitted can be approximately the same as the amount of light emitted from the translucent portion, and uniform brightness can be achieved over the entire surface of the lighting device.

  ADVANTAGE OF THE INVENTION According to this invention, the non-light-emitting part in the lighting state of an illuminating device can be reduced.

1 is an external view illustrating an example of a configuration of a lighting device according to Embodiment 1. FIG. FIG. 3 is an exploded perspective view illustrating an example of a configuration of the lighting apparatus according to the first embodiment. FIG. 3 is a cross-sectional view illustrating an example of a main part of the configuration of the lighting device according to the first embodiment. It is a top view which shows the example of arrangement | positioning of the principal part near the circuit board of the illuminating device of this Embodiment. It is a top view which shows an example of a structure of the LED module of this Embodiment. FIG. 3 is an enlarged view of a main part of a center cover of the lighting device according to the first embodiment. 3 is a schematic diagram illustrating an example of a dot pattern of a reflective cover according to Embodiment 1. FIG. 6 is a schematic diagram illustrating a second example of a dot pattern of the reflective cover according to Embodiment 1. FIG. 6 is a schematic diagram illustrating a third example of a dot pattern of the reflective cover according to Embodiment 1. FIG. 2 is an external perspective view of a center plate according to Embodiment 1. FIG. FIG. 6 is a cross-sectional view illustrating an example of a main part of a configuration of a lighting device according to a second embodiment. It is explanatory drawing which shows the example of arrangement | positioning of the LED module of the illuminating device of Embodiment 2. FIG.

(Embodiment 1)
Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments thereof. FIG. 1 is an external view showing an example of the configuration of the illumination device 100 according to the first embodiment, and FIG. 2 is an exploded perspective view showing an example of the configuration of the illumination device 100 according to the first embodiment. In the following description, a ceiling light that can be detachably attached to a mounting surface such as a ceiling is given as an example of the lighting device 100, but the lighting device 100 of the present embodiment is not limited to a ceiling light. .

  As shown in FIGS. 1 and 2, a lighting device 100 is made of metal (for example, aluminum) and a chassis 1 as a disk-shaped lighting device body is attached to a ceiling or the like. A light-transmitting cover 7 is attached as a light-transmitting part that is light diffusive. A disc-shaped opening 71 and a mounting portion 72 for mounting a center plate 8 to be described later are provided at the center of the translucent cover 7. A center cover 9 as a light guide member can be detachably attached to the center plate 8.

  The lighting device 100 includes, in addition to the chassis 1, the translucent cover 7 and the center cover 9, eight LED modules 2 as light sources, and has a substantially U-shaped cross-section. Eight heat radiation fins 3 made of excellent metal, eight lenses 4 for advancing light emitted from the LED module 2 in a required direction, a power supply unit (power supply circuit) for supplying a required current to the LED module 2, and A control unit (control circuit) for controlling the brightness of the LED module 2 is mounted to electrically insulate the circuit board 5 having an opening at the center and an octagonal outer periphery, the chassis 1 and the circuit board 5. It is fixed to the insulating sheet 51, the first ring material 6 and the second ring material 60 as fitting portions to be fitted to the mounting adapter 63 described later, the annular elastic material 10 for maintaining the sealing property, and the first ring material 6. Connection It has a data, and a like center plate 8 as a harness 61, and a cover plate for covering the internal parts such as a circuit board 5 for supplying commercial power to the circuit board 5.

  The first ring member 6 and the second ring member 60 are fitted with the circuit board 5 sandwiched therebetween. On each side of the octagonal outer periphery of the circuit board 5, the heat radiation fin 3, the LED module 2, and the lens 4 are attached with screws or the like. The heat radiation fin 3 is fixed to the center plate 8 with screws or the like, and is also fixed to the chassis 1 with screws or the like.

  FIG. 3 is a cross-sectional view showing an example of a main part of the configuration of lighting apparatus 100 of the first embodiment. As shown in FIG. 3, the flat, substantially cylindrical mounting adapter 63 has a connector (not shown) to which a power line from a commercial power source is connected, and a hook ceiling (hook portion) 62 provided on the ceiling. Be hooked (engaged). Thereby, the mounting adapter 63 is electrically and mechanically connected to the hooking ceiling 62. By connecting the connector (not shown) of the mounting adapter 63 to the connector of the harness 61, the AC voltage of the commercial power supply is supplied to the circuit board 5. Further, the lighting device 100 can be installed on the ceiling by fitting either the first ring member 6 or the second ring member 60 fixed to the chassis 1 and the mounting adapter 63.

  The circuit board 5 is connected to a sensor board (both not shown) on which an illuminance sensor is mounted. The illuminance sensor includes, for example, a phototransistor or a photodiode, and outputs an electrical signal corresponding to the detected illuminance. A control unit (not shown) adjusts the brightness of light from the LED module 2 according to the illuminance detected by the illuminance sensor. For example, a control part controls the electric current which flows into LED module 2 so that the illumination intensity detected with an illumination intensity sensor turns into required illumination intensity.

  The lens 4 collects the light emitted from the LED module 2 and radiates the collected light in a direction (ceiling direction) inclined upward by about 5 to 10 degrees from the horizontal direction. A reflective surface 11 is formed inside the chassis 1. In order to form the reflective surface 11, for example, a reflective sheet may be attached, or a reflective film may be applied. The light emitted from the lens 4 travels downward by being reflected by the reflecting surface 11, is transmitted and diffused by the light-transmitting cover 7, and is emitted downward from the lighting device 100.

  The circuit board 5 has heat radiation fins 3 fixed with screws or the like. The radiating fin 3 has a substantially U shape, and one side surface is fixed to the chassis 1 with a screw or the like, and the other side surface is fixed to the center plate 8 with a screw or the like. As a result, the circuit board 5 is fixedly attached to the chassis 1 as the lighting device body.

  Between the outer edge part of the chassis 1 and the outer edge part of the translucent cover 7, an annular elastic member 10 is provided to maintain sealing performance and prevent insects from entering.

  The center cover 9 includes a disk-shaped reflection plate 19 as a first reflection portion that reflects light to be radiated to the outside, and a second reflection portion that is provided opposite to the first reflection portion and has a dot pattern to be described later. And a reflective cover 29. The center cover 9 is provided adjacent to the center plate 8 on the front surface of the center plate 8, in other words, on the irradiation direction side of the illumination device 100 of the center plate 8. In the center cover 9, a reflecting plate 19 is disposed so as to face the center plate 8, and a reflecting cover 29 is disposed on the opposite side of the center plate 8 so as to face the reflecting plate 19. In addition, the dimension between the reflecting plate 19 and the reflecting cover 29 can be set as appropriate, may be separated by an appropriate length, or may be brought into contact with each other. The reflection plate 19 and the reflection cover 29 can be fixed with an adhesive or the like.

  The reflection plate 19 is made of a synthetic resin such as polyethylene terephthalate, for example, and has a surface subjected to a reflection treatment such as a reflective coating (for example, white coating).

  The reflection cover 29 is, for example, a synthetic resin such as acrylic having excellent light transmittance. In addition to acrylic, polycarbonate or the like may be used.

  The reflection cover 29 has a reflecting dot pattern formed on the surface facing the reflection plate 19. In the dot pattern, a plurality of recesses are arranged on the surface of the reflection cover 29, and the recesses can be dug by a laser or the like. Instead of forming the recess, a reflective paint may be dot printed on the surface. In addition, a reflective dot pattern can be formed on both sides of the reflective cover 29.

  In the present embodiment, the reflection plate 19 as the first reflection part and the reflection cover 29 as the second reflection part that constitute the center cover 9 as the light guide member are provided separately, but the first The reflective portion and the second reflective portion may be provided integrally. For example, the first reflection part is formed on one surface of the acrylic plate as the light guide member on the side of the center plate 8 to form the first reflection part, and the dot pattern as the second reflection part is formed on the other surface. You may comprise an optical member.

  FIG. 4 is a plan view showing an arrangement example of the main part in the vicinity of the circuit board 5 of the lighting apparatus 100 of the present embodiment. As shown in FIG. 4, eight radiating fins 3 are fixed along the regular octagonal outer periphery of the circuit board 5 having the opening 63 at the center. The LED module 2 is attached to each radiation fin 3. The heat radiating fins 3 serve both as a heat radiating part for radiating heat from the LED module 2 and as an angle for fixing the LED module 2. Inside the chassis 1, the LED module 2, which is a light source, and built-in components such as the circuit board 5 are partitioned and accommodated by the radiation fins 3. The LED module 2 housed in the chassis 1 and the built-in component are partitioned in parallel in a direction perpendicular to the irradiation direction of the lighting device 100, and the LED module 2 is arranged on the front surface (irradiation direction side) of the built-in component, for example. Compared with the case where it does, thickness reduction of the illumination measure 100 can be achieved.

  Moreover, the lens 4 which condenses the light emitted from the LED module 2 is provided in a regular octagonal shape. The lens 4 may be fixed to the radiation fin 3 or may be fixed to the circuit board 5. When the LED module 2 is turned on, the light from the LED module 2 is emitted radially from the center of the chassis 1 toward the outer edge.

  Part of the light emitted from the LED module 2 is specularly reflected at the reflecting surface 11. The light reflected by the reflecting surface 11 enters the inner surface of the light-transmitting cover 7 and is emitted from the outer surface of the light-transmitting cover 7 to the outside of the lighting device 100 while diffusing inside the light-transmitting cover 7.

  As described above, since the light emission direction of each LED module 2 is the direction from the center portion of the chassis 1 to the outer edge portion, and the irradiation direction of the lighting device 100 is a direction intersecting with the light emission direction of the LED module 2, Of the light emitted from the LED module 2, the light that directly enters the light-transmitting cover 7 and exits the illumination device 100 can be reduced, and the direct light from the LED module 2 enters the eyes of the user. Can be reduced, and glare can be reduced.

  FIG. 5 is a plan view showing an example of the configuration of the LED module 2 of the present embodiment. As shown in FIG. 5, the LED module 2 includes a rectangular plate-shaped LED substrate 21 and nine LEDs 22 arranged in a line along the longitudinal direction of the LED substrate 21. The LED 22 is, for example, a daylight color LED, but may be another emission color. Nine LEDs 22 are connected in series, and the LED module 2 forms one series light source group. The LED substrate 21 is made of a metal such as iron or aluminum, and also serves as a heat conductor that conducts heat from the LED 22 to the radiation fins 3. The number of LEDs 22 is not limited to nine.

  FIG. 6 is an enlarged view of a main part of the center cover 9 of the illumination device 100 according to the first embodiment. FIG. 6 is an enlarged view of the area indicated by the symbol A illustrated in FIG. As shown in FIG. 6, the center plate 8 is attached to the attachment portion 72 of the translucent cover 7, and the center cover 9 is in close contact with the translucent cover 7 so as to cover the center plate 8.

  More specifically, the peripheral end surface 291 that is an end portion of the reflecting cover 29 that is in close contact with the light transmitting cover 7 is mirror-finished and is in contact with the light transmitting cover 7. A reflective dot pattern 292 is formed on the surface of the reflective cover 29 on the center plate 8 side.

  As indicated by the dashed arrows in FIG. 6, a part of the light emitted from the LED module 2 passes through the translucent cover 7 and proceeds from the peripheral end surface 291 of the reflective cover 29 to the inside of the reflective cover 29. Of the light traveling to the inside of the reflection cover 29, the light reflected by the dot pattern 292 is radiated to the outside of the reflection cover 29 from the surface 293 opposite to the surface to which the dot pattern 292 is attached. Of the light traveling inside the reflective cover 29, the light transmitted through the reflective cover 29 without being reflected by the dot pattern 292 is reflected by the reflective plate 19 and is incident on the reflective cover 29 again. The light is emitted from the surface 293 opposite to the attached surface to the outside of the reflective cover 29. By forming the dot pattern 292, the light from the LED module 2 is prevented from being absorbed inside the reflective cover 29 and not radiated to the outside, and the light from the LED module 2 is sent to the center cover 9 (reflective cover 29). It can be guided to the whole and radiated to the outside.

  The dot pattern may be provided on one surface of the reflection cover 29 on the side of the center plate 8, or may be provided on the other surface opposite to the center plate 8 (surface 293 shown in FIG. 6), or on both surfaces. Also good. The operation of the center cover 9 when the dot pattern is provided only on the other surface will be described. Similar to the case shown in FIG. 6, a part of the light emitted from the LED module 2 passes through the translucent cover 7 and proceeds from the peripheral end surface 291 of the reflective cover 29 to the inside of the reflective cover 29. Of the light traveling to the inside of the reflection cover 29, the light reflected by the dot pattern provided on the other surface is transmitted through the reflection cover 29 from the one surface side where the dot pattern on the center plate 8 side is not provided and is reflected by the reflection plate 19. After being incident on the reflective cover 29 again, it is transmitted through the portion on the other surface where the dot pattern is not applied and is emitted to the outside. Further, the light that is not reflected by the dot pattern and is transmitted from the one surface side of the reflection cover 29 is reflected by the reflection plate 19 and is incident on the reflection cover 29 again, and then is transmitted through the portion not provided with the dot pattern on the other surface. And radiated to the outside.

  Whether the dot pattern is provided on the one surface or the other surface, the dot pattern has an effect of changing the traveling direction of the light traveling inside the reflection cover 29 to the traveling direction toward the other surface. This makes it easier for light to be emitted from the reflective cover 29 and increases the amount of light emitted from the center cover 9.

  As described above, the lighting device 100 is provided with the LED module 2 and the built-in components partitioned by the heat radiating fins 3 in the chassis 1 in order to achieve a reduction in thickness. For this reason, since the light from the LED module 2 is not emitted from the front surface of the built-in component, in other words, the surface on the irradiation direction side of the built-in component, the front surface of the built-in component becomes a non-light emitting portion. When the center cover 9 is not provided, a non-light-emitting portion exists on the side of the light-transmitting cover 7 that emits light when the lighting device 100 is turned on, which makes the user feel uncomfortable.

  As shown in FIGS. 3 and 6, the lighting device 100 is disposed on substantially the same plane as the translucent cover 7 that transmits light from the LED module 2 and covers the front surface of the built-in component that is a non-light-emitting portion. 8 is provided, and a center cover 9 for guiding the light from the LED module 2 and radiating it to the outside is provided along with the center plate 8. In other words, the illuminating device 100 includes the center cover 9 that is positioned in front of the built-in component that is a non-light-emitting portion on the front surface of the illuminating device 100 and that is arranged in parallel with the translucent cover 7. By providing a center cover 9 having a light guide member function along with the center plate 8, light can be emitted not only from the translucent cover 7 but also from the center cover 9. The non-light emitting portion in can be reduced. In this Embodiment 1, the discomfort of a lighting state is prevented by making it emit light from the whole front surface of the illuminating device 100. FIG. In addition, although the example which provides the center cover 9 which covers the whole front surface of the built-in component which is a non-light-emitting part was demonstrated in this Embodiment 1, lighting of an illuminating device is provided by providing the light guide member which covers a part of non-light-emitting part. It is good also as a structure which reduces the non-light-emitting part in a state. Further, the front surface of the built-in component may be directly covered with the center cover 9 without providing the center plate 8 as the cover plate.

  Further, as shown in FIG. 6, since the peripheral end surface 291 of the reflective cover 29 is in close contact with the translucent cover 7, it is possible to prevent a portion that does not emit light between the translucent cover 7 and the reflective cover 29. It is possible to further eliminate the uncomfortable feeling of the lighting state. In the example of FIG. 6, the peripheral end surface 291 of the reflection cover 29 is in contact with the outer surface of the translucent cover 7, but the configuration is not limited thereto. For example, the reflective cover 29 may be fitted into the opening 71 of the translucent cover 7, and the light from the LED module 2 may be directly captured without causing the peripheral end surface 291 of the reflective cover 29 to contact the translucent cover 7. Good. In this case, more light can be taken into the reflective cover 29 than in the example of FIG.

  The peripheral end surface 291 of the reflection cover 29 does not necessarily need to be mirror-finished, but by performing the mirror-surface treatment, the amount of light taken into the reflection cover 29 can be increased, and the center cover 9 (reflection cover 29). The amount of light emitted from can be increased.

  FIG. 7 is a schematic diagram illustrating an example of the dot pattern 292 of the reflective cover 29 according to the first embodiment. As shown in FIG. 7, the dot pattern 292 has a circular shape, and is provided concentrically with an appropriate distance from each other. The shape of the dot pattern 292 is not limited to a circular shape, and may be a polygonal shape such as a triangular shape, a quadrangular shape, or a pentagonal shape, an elliptical shape, or the like. In addition, the arrangement of the dot patterns 292 is not limited to a concentric circle. For example, when the shape of the reflective cover 29 is a rectangle or a square, the dot pattern 292 may be arranged in a lattice shape according to the shape of the reflective cover 29. Moreover, even if it is the circular reflective cover 29 like the illuminating device 100 of this Embodiment, a dot pattern may be arrange | positioned at a grid | lattice form, and even if it is a square-shaped reflective cover, a dot pattern is concentric. Of course, it may be arranged. That is, the arrangement of the dot pattern is not limited by the shape of the reflective cover.

  The dot pattern 292 is not limited to the example of FIG. Other examples are shown below. FIG. 8 is a schematic diagram illustrating a second example of the dot pattern 292 of the reflective cover 29 according to the first embodiment. As shown in FIG. 8, the density of the dot pattern 292 can be made higher in the central portion than in the peripheral portion of the reflective cover 29. That is, the density of the dot pattern 292 is arranged on the center cover 9 as the light guide member so as to increase as the distance from the LED module 2 as the light source increases. The light traveling in the reflective cover 29 is reflected at the location where the dot pattern 292 is formed, so that the traveling direction of the light is changed to the direction of passing through the reflective cover 29 and radiating to the outside. The higher the density of the dot pattern 292, the more light is reflected. Therefore, the amount of light reflected at the central portion is larger than the peripheral portion of the reflective cover 29. Therefore, the amount of light emitted from the reflected portion increases. On the other hand, since the amount of light attenuates as the light from the LED module 2 travels from the peripheral part toward the central part inside the reflective cover 29, the density of the dot pattern 292 is increased in the central part rather than the peripheral part. The amount of light emitted from the periphery to the center of the reflection cover 29 can be made uniform.

  FIG. 9 is a schematic diagram illustrating a third example of the dot pattern 292 of the reflective cover 29 according to the first embodiment. As shown in FIG. 9, the area of the dot pattern 292 can be made wider in the central portion than in the peripheral portion of the reflective cover 29. That is, the dot pattern 292 is disposed on the center cover 9 as the light guide member so that the area of the dot pattern 292 increases as the distance from the LED module 2 that is the light source increases. When the area of the dot pattern 292 is wider, the amount of reflected light is larger, so that the amount of reflected light at the central portion is larger than the peripheral portion of the reflective cover 29. Therefore, the amount of light emitted from the reflected portion increases. On the other hand, since the amount of light attenuates as the light from the LED module 2 travels from the peripheral part toward the central part inside the reflective cover 29, the area of the dot pattern 292 is increased in the central part rather than the peripheral part. The amount of light emitted from the periphery to the center of the reflection cover 29 can be made uniform.

  FIG. 10 is an external perspective view of the center plate 8 of the first embodiment. As shown in FIG. 10, in order to attach the center cover 9 to the center plate 8, a fixing piece 81 having a substantially L-shaped cross section is provided upright. The center plate 8 has an opening 84 for providing a light receiving portion for receiving light from a remote operation terminal device such as a remote control or for providing an indicator lamp for displaying the state of the illumination device 100. Further, the center plate 8 has an attachment portion 82 for attaching the connector of the harness 61.

  When attaching the center cover 9 to the illuminating device 100, a section (not shown) provided on the center cover 9 is aligned with the position of the fixed piece 81, and the center cover 9 is rotated by about the length of the fixed piece 81 to fix the section. Insert into the gap between the pieces 81.

  In addition, a fixing jig such as a harness clip is attached to an appropriate position of the center plate 8, and a ring provided at one end of a wire (or string) 83 of an appropriate length is attached to the harness clip, and at the other end of the wire 83. The provided ring is attached to an appropriate portion of the center cover 9. Thereby, the fall prevention at the time of attaching the center cover 9 to the illuminating device 100 can be aimed at. Instead of providing a harness clip or the like, one end side of the wire 83 may be formed in an annular shape, and the wire 83 may be attached to the lighting device 100 side by passing a power line from the attachment adapter 62 through the ring. it can.

(Embodiment 2)
FIG. 11 is a cross-sectional view illustrating an example of a main part of the configuration of the illumination device 120 according to the second embodiment. FIG. 12 is an explanatory diagram illustrating an arrangement example of the LED modules 52 of the illumination device 120 according to the second embodiment. In the first embodiment, the light from the LED module 2 is guided to the inside of the center cover 9, but in the second embodiment, the LED module 2 as the main light source and the LED module 2 are separately provided as the light source. This embodiment is different from the first embodiment in that an LED module 52 as a light source is provided and light from the LED module 52 is also guided into the center cover 9.

  In the LED module 52, one LED 522 is mounted on the substrate, and as shown in FIG. 12, the LED module 52 is in a state of facing the peripheral end surface 291 in the vicinity of the peripheral end surface 291 of the reflective cover 29. It is arranged. In addition, the number or arrangement | positioning space | interval of the LED module 52 and LED522 is an example, Comprising: It is not limited to the example of FIG. 11, FIG.

  The LED module 52 as an auxiliary light source different from the LED module 2 as the main light source is provided, and the center cover 9 (reflective cover 29) guides light from the LED module 52 as well as the LED module 2 to the outside. Radiate. By using the auxiliary LED module 52, the amount of light emitted from the center cover 9 can be set to a desired value. For example, the light emission amount of the LED module 52 can be adjusted so that the light emission amount is approximately the same as the light emission amount from the translucent cover 7, and uniform brightness can be achieved on the entire surface of the lighting device 120. In the second embodiment, the example in which the light from both the LED module 2 and the LED module 52 is guided to the center cover 9 has been described. However, the light from only the LED module 52 that is an auxiliary light source is guided to the center cover 9. May be.

  The auxiliary LED module 52 can also be used as a night light. Specifically, with the LED module 2 turned off, only the LED module 52 is turned on to guide light into the center cover 9, and light is emitted from the front surface of the center cover 9, so that the central portion of the lighting device 120 is It can be used as a glowing night light.

  In the above-described embodiment, the lighting device as the ceiling light has been described. However, the lighting device is not limited to the ceiling light, and may be another lighting device. Moreover, although the illuminating device provided with the LED module as the light source has been described, the light source is not limited to the LED module, and other light sources such as EL (Electro-Luminescence) may be used.

1 Chassis 2 LED module (light source)
5 Circuit board (built-in parts)
7 Translucent cover 8 Center plate (cover plate)
9 Center cover (light guide member)
19 Reflector 29 Reflector cover (light guide member)
292 dot pattern 52 LED module (light source for auxiliary)

Claims (8)

A lighting device including a non-light emitting part on a light transmitting part side that transmits and emits light from a light source,
An illuminating device comprising a light guide member that is positioned in front of the non-light emitting portion and that emits light by guiding light from the light source. A lighting device main body that partitions and accommodates built-in components such as a power supply circuit and a light source;
A light-transmitting part that transmits and emits light from the light source;
An illuminating device comprising: a light guide member that is positioned in front of the built-in component and that is provided in parallel with the light-transmitting portion and that guides light from the light source to emit light. The light guide member is
A first reflecting portion that reflects light and emits the light to the outside of the light guide member;
The lighting device according to claim 1, further comprising: a second reflecting portion that is opposed to the first reflecting portion and has a dot pattern.   The lighting device according to claim 3, wherein the density of the dot pattern increases as the distance from the light source increases.   The lighting device according to claim 3, wherein an area of the dot pattern becomes wider as the distance from the light source increases.   The lighting device according to any one of claims 1 to 5, wherein an end portion of the light guide member on which light enters is in close contact with the light transmitting portion.   The lighting device according to claim 6, wherein the end portion in close contact with the light transmitting portion is mirror-finished.   The illumination device according to any one of claims 1 to 7, wherein the light source includes an auxiliary light source provided to face an end portion of the light guide member on which light enters.

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