JP5948293B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device.

  2. Description of the Related Art In recent years, an illumination device that includes an auxiliary illumination unit that is supplementarily added to enhance decorativeness is known in addition to a main illumination unit. For example, in Cited Document 1, in addition to the main illumination arranged on the lower surface side of the instrument main body, light is indirectly introduced by introducing light into the light guide plate arranged via the indirect light source accommodating section along the outer peripheral part of the instrument main body. Lighting fixtures that obtain light have been proposed. This luminaire is configured such that light leaked from the upper surface of the light guide plate is reflected by the light reflecting plate disposed on the upper surface side of the light guide plate and returned to the light guide plate to obtain good indirect light.

JP 2009-21200 A

  When a light source is newly provided as an auxiliary illumination unit, control for that is required. It is an object of the present invention to provide a lighting device that can enhance the decorativeness without newly including an LED.

  In order to solve the above-described object, the present invention provides a lighting device main body, a lighting light source that is disposed on the lower surface side of the lighting device main body and mainly illuminates the lower surface side, a translucent cover that covers the lighting light source, A decorative frame that covers at least the upper surface side peripheral portion of the translucent cover and has an outer peripheral portion located outside the side surface portion of the lighting device main body, the decorative frame covers the upper surface side peripheral portion, An incident portion that receives light emitted from the illumination light source and transmitted through the transparent cover, a light guide portion that guides light from the incident portion, and light guided by the light guide portion on the lower surface side An exit portion having an exit surface for exiting, and a direction changing portion for guiding light from the light guide portion to the exit portion, and the incident portion to the direction changing portion have substantially the same thickness. Yes, the thickness gradually increases from the direction changing portion toward the exit surface of the exit portion. Characterized in that it comprises.

  ADVANTAGE OF THE INVENTION According to this invention, the illuminating device which can improve decorativeness without newly providing a light source can be provided.

It is a whole perspective view of the illuminating device 1. FIG. It is a partially exploded perspective view of the illuminating device 1 of FIG. It is a disassembled perspective view of the illuminating device 1 of FIG. It is AA 'sectional drawing of FIG. It is an enlarged view of the expansion range A of FIG.

  Embodiments according to the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of the lighting device 1. FIG. 2 is a partially exploded perspective view of the lighting device 1 of FIG. FIG. 3 is an exploded perspective view of the lighting device 1 of FIG. 4 is a cross-sectional view taken along the line AA ′ of FIG. FIG. 5 is an enlarged view of the enlarged range A of FIG.

  In this example, an LED illumination device using a light emitting diode (LED) as an illumination light source will be described below, but the illumination light source is not limited to an LED. Moreover, although the LED lighting apparatus of this example was substantially circular, the shape is not limited to this.

  The LED lighting device is connected to an external power source through an attachment adapter (not shown) that engages with an indoor wiring device (not shown) such as a hooking rosette or hooking ceiling provided on the ceiling surface of a house, for example, as an LED ceiling light At the same time, it is fixed at a predetermined position on the ceiling surface for use. In the following description, unless otherwise specified, the ceiling side is referred to as the “upper surface side” and the opposite side (the floor side) is referred to as the “lower surface side” based on the state where the lighting device is attached to the ceiling surface. .

  As shown in FIG. 1, the lighting device 1 includes a lighting device main body 2, a translucent cover 3 attached to the lighting device main body 2, and a decorative frame 4 attached to the outer peripheral side of the translucent cover 3.

  As shown in FIG. 2, in the lighting device 1, the translucent cover 3 is detachable from the lighting device 2.

  As shown in FIG. 3, the lighting device 1 includes a substantially circular main body base 15, sensor 14, insulating plate 13, power supply substrate 12, heat dissipation plate 11, substrate case 10, and light receiving substrate from members close to the ceiling. 9, a lighting device body 2 including a lighting LED substrate 8 and a reflective sheet 7, an LED cover 6 and a reflective cover 5, a decorative frame 4, and a translucent cover 3.

  In the lighting device main body 2, the main body base 15 is a part formed by processing a metal plate or the like into a substantially circular shape. In the center of the main body base 15, an instrument mounting portion that is a substantially circular hole is provided. An attachment adapter (not shown) is engaged and fixed to the instrument attachment portion via a hook portion. The mounting adapter is engaged and fixed to the indoor wiring device on the ceiling side. Thereby, the illuminating device 1 containing the main body base 15 is fixed to the predetermined position of a ceiling surface via an attachment adapter, an appliance attachment part, and an indoor wiring appliance, respectively.

  The LED board 7 for illumination, the LED cover 6, and the reflection sheet 7 are referred to as an illumination light source. The LED cover 6 includes an outer cover portion 6a and an inner cover portion 6b.

  A power supply connection portion (not shown) is provided in the vicinity of the appliance mounting portion. The power supply connecting portion electrically connects the mounting adapter and the power supply board 12 via an electric wire (not shown). Thereby, the illuminating device 1 receives electric power through an indoor wiring fixture, an attachment adapter, and an electric power feeding connection part, respectively.

  The insulating plate 13 is provided between the main body base 15 and the heat radiating plate 11. The main body base 15 and the heat radiating plate 11 are both made of metal, for example, a pre-coated metal (PCM) steel plate. On the other hand, the insulating plate 13 is formed using a resin material such as polypropylene (PP) having electrical insulation and flame retardancy.

  The power supply substrate 12 and the control substrate 114 are held on the insulating plate 13 via a substrate locking portion protruding from the outer edge of the insulating plate 13. The insulating plate 13 is fixed to the main body base 15 with screws. As a result, the power supply substrate 12 is locked and fixed in the heat dissipation space surrounded by the main body base 15 and the heat dissipation plate 11 while maintaining electrical insulation.

  The heat sink 11 serves to cool the power supply board 12 and the LED board 8 on which a plurality of LEDs are mounted. These substrates generate heat during their operation. In general, an LED which is a semiconductor element has a property of being vulnerable to heat. In addition, since a high-intensity light emission is performed by flowing a large current at a low voltage during use, the LED itself and surrounding members deteriorate due to the heat generated by the light emission. In order to suppress such deterioration and realize a long life and high reliability, it is required to perform appropriate heat dissipation.

  When the power supply substrate 12 and the LED substrate 8 generate heat, the ambient temperature of the heat dissipation space surrounded by the main body base 15 and the heat dissipation plate 11 rises. At this time, if the volume of the heat radiation space is small, the amount of air accommodated therein is reduced. As a result, since the heat dissipation effect due to contact with air is reduced, the volume of the heat dissipation space is preferably as large as possible. Further, from the viewpoint of maintaining good thermal conductivity, it is preferable that the heat radiating plate 11 has a substantially truncated cone shape and is integrally formed without a joint. Such a heat sink 11 is manufactured by press-molding a thin metal plate.

  In the illumination light source, the LED substrate 8 may be configured to include four substantially fan-shaped substrates that are common to each other. These four substrates form a substantially donut shape as a whole when attached to a predetermined position of the heat sink 11.

  A plurality of LEDs are mounted on the LED substrate 8 by soldering. These LEDs emit light and generate heat when activated, raising their own temperature. The luminous efficiency of the LED decreases as the temperature increases. In addition, the service life will be shortened. For this reason, it is necessary to separately provide an appropriate heat dissipation means commensurate with the temperature rise.

  The LED cover 6 has a function of guiding light beams emitted from a plurality of LEDs to the lower surface side (floor side), a function of physically preventing contact with the power supply lines related to the plurality of LEDs, and the LED board 8 as a heat sink 11. It has the function to press so that it may stick to.

  FIG. 2 is a partial view showing an example of a state in which the LED cover 6 is attached to the LED substrate 8. As illustrated, the plurality of LEDs are configured to emit light through a plurality of corresponding dome-shaped portions. In this example, a pair of LEDs is accommodated in one dome-shaped portion, but the number of LEDs accommodated in the dome-shaped portion is not limited to this. Of the pair of LEDs, for example, one is a white LED that emits a white light beam, and the other is a warm LED that emits a warm light beam. As these LEDs, for example, by combining a blue LED that emits a blue light beam and a yellow phosphor, blue light emission and yellow light emission are combined to emit white light or warm light (for example, orange). What is necessary is just to employ | adopt suitably.

  The LED cover 6 is integrally formed using a resin having translucency and electrical insulation, such as polycarbonate (PC), acrylic (PMMA), and polystyrene (PS). The integral molding using this resin and the plurality of dome-shaped portions that allow the light from each LED to pass through together ensure the rigidity of the LED cover 6 and improve the adhesion of the LED substrate 8 to the heat sink 11. I am doing so.

  A configuration is adopted in which the LED cover 6 is screwed and fixed to the heat dissipation plate 11 with the LED substrate 8 interposed between the heat dissipation plate 11 and the LED cover 6. Thereby, the adhesiveness of the LED board 8 with respect to the heat sink 11 becomes high, and can improve heat dissipation. For this reason, the illuminating device 1 in which the density of the light emitting surface is uniform and the light emitting efficiency of the LED is excellent can be realized. Furthermore, there is an effect of correcting the LED arrangement at an appropriate position with respect to the LED cover 6 and reducing the warpage and deformation of the LED substrate 8.

  The translucent cover 3 is engaged and held in a suspended state by a fixture fixed to the skirt portion of the heat radiating plate 11. Specifically, for example, by rotating the translucent cover 3 counterclockwise in the circumferential direction, an engaging portion (not shown) protruding from the translucent cover 3 is released. The translucent cover 3 is integrally formed using a translucent resin such as acrylic (PMMA).

  The top plate (not shown) covers at least the upper surface side peripheral portion of the illuminating device main body 11 and is located outside the side surface portion of the illuminating device main body 11.

  As shown in FIG. 5, the sensor 14 includes a sensor case 14c, a sensor body 14b, and a sensor opening 14a provided in the sensor case.

  The decorative frame 4 includes an enlarged portion 4a, a direction changing portion 4b, a light guide portion 4c, an incident portion 4d, and a rising portion 4e in this order from the end. Moreover, the output part 4a1 is provided in the edge part (end part of the decoration frame 4) of the expansion part 4a. Further, the direction changing portion 4b includes a refractive wall surface 4b1. The decorative frame 4 covers at least the peripheral portion on the upper surface side of the translucent cover 3 and has a portion located outside the side surface portion of the lighting device main body 2. In the decorative frame 4, it is the rising part 4 e and the incident part 4 d that cover at least the peripheral part on the upper surface side of the translucent cover 3. The portions located outside the side surface portion of the illuminating device main body 2 are a light guide portion 4c, a direction changing portion 4b, and an enlarged portion 4a.

  The rising portion 4 e is a portion provided for connection with the translucent cover 3. The translucent cover 3 is connected by screwing the rising portion 4e.

  The incident portion 4d has a shape that follows the curved surface of the translucent cover 3, and is a portion that is provided to allow light emitted from the illumination light source and transmitted through the translucent cover 3 to enter.

  The light guide part 4 is a part provided to guide the light incident from the incident part 4d. The light guide 4c has a substantially planar shape toward the outer side (substantially horizontal direction) from the side surface of the illuminating device body 2.

  The direction conversion unit 4d is a part that guides the light guided by the light guide unit 4c to the output unit 4a. The light emitting portion 4a is provided so as to be substantially perpendicular to the light guide portion 4c, and the direction changing portion 4b guides the light guide portion 4c toward the outer side (side surface direction) from the lighting device body 2. The light that has been radiated is guided in a substantially vertical direction toward the emitting portion 4a. In particular, the light that has been guided in the light guide portion 4c toward the outer side by the refracting wall surface 4b1 that is the wall surface of the direction changing portion 4b can be guided in a substantially vertical direction toward the emitting portion 4a. it can. The refractive wall surface 4b1 is a surface that is substantially perpendicular to the light guide portion 4c. The refractive wall surface 4b1 is a surface that is substantially perpendicular to the emission surface 4a1.

  The emission unit 4a includes an emission surface 4a1 that emits the light guided through the direction conversion unit 4b toward the lower surface.

  In the decorative frame 4, the rising portion 4e, the incident portion 4d, the light guide portion 4c, and the direction changing portion 4b have substantially the same thickness, and the emitting portion 4a gradually moves from the direction changing portion 4b toward the emitting surface 4a1. The thickness is thick.

  By providing the decorative frame 2 described above, the illuminating device 1 has a substantially circular main light emitting portion by the light of the illumination light source that passes through the translucent cover 1 and a substantially annular shape by the light emitted from the emission surface 4a1 of the decorative frame 2. It is possible to provide an illuminating device that can emit light from the sub-light emitting portion and can be improved in decoration without newly providing a light source.

  As described above, the illumination by the light source for main illumination is performed by selecting a light emission color of a plurality of LEDs and a phosphor, and obtaining a desired color temperature by combining them. As another embodiment, the LEDs of the main illumination light source also include three types of RGB LEDs, respectively, and by adjusting the output of the three types of LEDs, the same color as the auxiliary illumination light source described above is used. Illumination light may be obtained.

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Illuminating device main body 3 Translucent cover 4 Decoration frame 4a Outgoing part 4a1 Outgoing surface 4b Direction conversion part 4b1 Refraction wall surface 4c Light guide part 4d Incident part 4e Standing part 5 Reflective cover 6 LED cover 6a Outer cover part 6b Inner cover Part 7 Reflective sheet 8 LED substrate 9 Light receiving substrate 10 Substrate case 11 Heat sink 12 Power supply substrate 13 Insulating plate 14 Sensor 14a Sensor opening 14b Sensor body 14c Sensor case 15 Body base A Enlarged range

Claims (2)

A lighting device body;
A light source for illumination, which is disposed on the lower surface side of the illumination device body, and mainly illuminates the lower surface side;
A translucent cover covering the illumination light source;
A decorative frame that covers at least the upper surface side peripheral portion of the translucent cover and has an outer peripheral portion located outside the side surface portion of the lighting device body;
The decorative frame covers a peripheral portion on the upper surface side, receives an incident light that is emitted from the illumination light source and transmitted through the transparent cover, a light guide portion that guides light from the incident portion, and the light guide. An emission part having an emission surface for emitting light guided by the optical part to the lower surface side, and a direction changing part for guiding light from the light guide part to the emission part, and the incident part The lighting device is characterized in that the thickness is substantially the same from the direction changing portion to the direction changing portion, and the thickness gradually increases from the direction changing portion toward the emission surface of the emission portion. The lighting device according to claim 1.
The illuminating device characterized in that the direction changing portion has a refractive wall surface that is substantially perpendicular to the exit surface.