JP2014229534A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which secures reduction in thickness by suppressing a projection amount to indoors; which has an excellent design; which requires only narrow mounting space; and which can secure sufficient brightness feeling of space.SOLUTION: The thin luminaire can be achieved as LEDs 15, 16 are arranged on a surface of a flat plate-like substrate 12. Also, an angle θ formed by a beam having the highest intensity out of the beams emitted from the LED 16 and reflected on an outer peripheral surface 17b, and a vertical direction of a ceiling surface CL is between 90 degrees to 180 degrees. Thus, even when the LEDs 15, 16 are arranged on the same substrate, both illumination downward and illumination toward the ceiling surface CL can be achieved, so that brightness feeling of space can be secured.

Description

  The present invention relates to an illuminating device, for example, an illuminating device suitable for use in an illuminating device used for space production such as a house or a store.

  Conventionally used devices that illuminate the entire indoor space include a pendant system that suspends a light source and a ceiling system that attaches the light source to the ceiling. Here, in the case of a ceiling-type lighting device as shown in Patent Document 1, it is desired to make the shape as thin as possible in order to ensure the freedom of indoor design and to effectively use the indoor space. Therefore, as a type of ceiling system, a downlight has been developed in which a light source is arranged on the back side from the ceiling surface so as to avoid protrusion into the indoor space as much as possible.

  However, since the downlight has a light source located behind the ceiling surface, the directivity of the light emitted from the light source is increased, and the light directly under the downlight is bright, but the ceiling surface and wall surface can be illuminated sufficiently brightly. There is a problem that you can not.

  In recent years, it has been found that when illuminating indoor lighting, even if the actual illuminance is the same, the degree of feeling the brightness of the space in which humans live may vary greatly. More specifically, by appropriately illuminating the surrounding ceiling surface and wall surface where humans are present, humans feel that the space is brighter even if the actual illuminance directly below is low. This is expressed as “a sense of brightness in space”. Therefore, even if the downlight has sufficient illuminance, it may be difficult to use as indoor lighting. Further, even in the illumination device of Patent Document 1, it is difficult to say that the brightness of the space can be sufficiently secured because the amount of light emitted from the light source wraps around the ceiling surface is relatively small.

  On the other hand, Patent Document 2 is an illumination device attached to a ceiling, in which LEDs are arranged in two upper and lower rows on an outwardly arranged circuit board, one LED illuminates a lower space, and the other LED The lighting of the ceiling surface is disclosed. According to such an illuminating device, the brightness of space can be enhanced.

JP 2012-256447 JP 2012-174528

  However, in the case of the illuminating device of Patent Document 2, since the two circuit boards are arranged to face each other, the structure protrudes indoors at least beyond the width of the circuit board, so that the design of the illuminating device is impaired. is there. In particular, in order to secure a sufficient amount of light with the current LED, it is necessary to increase the number of LEDs, and the circuit board is accordingly increased in size, which causes a problem in increasing the size of the illumination device.

  The present invention has been made in view of the above circumstances, and it is possible to ensure a thin shape by suppressing the amount of protrusion to the interior, which is excellent in design, requires a small installation space, and is bright in the space. An object of the present invention is to provide a lighting device that can ensure a sufficient feeling.

The lighting device according to claim 1 is provided.
A substrate that can be mounted with the back side facing the mounting surface;
A first light source and a second light source disposed on a surface of the substrate;
Optical path deflecting means for changing the direction of the light beam emitted from the second light source,
An angle formed between the light beam having the highest intensity among the light beams emitted from the first light source and the light beam having the highest intensity among the light beams emitted from the second light source whose direction is changed by the optical path deflecting unit. Is 90 degrees to 180 degrees.

  According to the present invention, since the first light source and the second light source are arranged on the surface of the substrate, a thin lighting device can be obtained. The light beam having the highest intensity among the light beams emitted from the first light source and the light beam having the highest intensity among the light beams emitted from the second light source whose direction is changed by the optical path deflecting means. Since the formed angle is 90 to 180 degrees, the downward illumination and the illumination to the ceiling surface and the like are performed even though the first light source and the second light source are arranged on the same substrate. And can ensure a sense of space brightness.

  According to a second aspect of the present invention, in the invention of the first aspect, the substrate is substantially circular, the first light source is disposed in a central region of the substrate, and the second light source is It is arranged in the peripheral area of the substrate.

  Accordingly, it is preferable because the light from the first light source is used to illuminate downward and the light from the second light source is easily used to illuminate the ceiling surface or the like.

  According to a third aspect of the present invention, in the invention according to the first or second aspect, the first light source and the second light source emit light having the highest intensity in a direction perpendicular to the mounting surface. The light is emitted.

  Thereby, a common thing can be used as said 1st light source and said 2nd light source, and cost reduction can be aimed at.

  According to a fourth aspect of the present invention, in the invention according to the first or second aspect, the first light source emits a light beam having the highest intensity in a direction perpendicular to the mounting surface, and the second light source. The light source emits a light beam having the highest intensity in a direction inclined with respect to the normal line of the mounting surface.

  Thereby, the freedom degree of light distribution of the light beam emitted from the second light source is increased, and illumination with excellent design can be realized.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the light beam emitted from the second light source is changed in direction by the optical path deflecting unit, and then circular. It is characterized by transmitting through the cover.

  By using a circular tubular cover, it is possible to protect the second light source without providing an opaque structure that blocks light from the second light source. In addition, dust and insects are less likely to adhere to the second light source. By providing an elastic member on at least one of the upper and lower surfaces of the annular cover, the annular cover can be incorporated without a gap.

  According to a sixth aspect of the present invention, in the invention of the fifth aspect, the cover has a diffusing structure.

  By providing the cover with a diffusing structure, for example, when an LED or the like is used as the second light source, the so-called granularity of the light source in which the light emission point is easily recognized as a bright point can be reduced.

  According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the optical path deflecting unit spatially divides the first light source and the second light source. It is characterized by that.

  For example, using white light with a relatively high color temperature for lighting directly under the lighting device, and improving workability, and at the same time, lighting on the ceiling surface increases the healing effect by using light with a lower color temperature Can do. For this reason, the wavelengths of the emitted light beams of the first light source and the second light source may be changed. However, the first light source and the second light source are spatially separated so that the two lights are not mixed. It is desirable to divide into two. In such a case, if the optical path deflecting unit is used as a partition for space division, the configuration of the illumination device can be simplified and the cost can be reduced.

  According to an eighth aspect of the present invention, in the invention according to any one of the first to seventh aspects, the optical path deflecting unit also serves as an exterior portion of the lighting device.

  Thereby, the structure of an illuminating device can be simplified and cost-reduced.

  The illuminating device according to claim 9 is the invention according to any one of claims 1 to 8, wherein the contact portion between the optical path deflecting means and the substrate has a through hole, and a screw is inserted into the through hole. Thus, the lighting device is fixed to the mounting surface.

  Thereby, the illuminating device can be fixed without the mounting screw blocking the optical path of the illumination light.

  According to a tenth aspect of the present invention, in the invention according to the ninth aspect, the screw is covered with a removable diffusion cover.

  Thereby, since the said screw is difficult to visually recognize from the outside, design property improves.

  The lighting device according to claim 11 is the invention according to any one of claims 1 to 10, wherein a terminal block having a power circuit section on the surface of the substrate and connecting an AC power line to the back surface of the substrate. It is provided.

  Thereby, the said illuminating device can be attached to a ceiling surface etc. so that illumination is possible.

  According to the present invention, it is possible to provide a lighting device that can ensure thinness by suppressing the amount of protrusion to the interior, is excellent in design, has a small mounting space, and can sufficiently secure the brightness of the space. be able to.

It is a section perspective view shown in the state where lighting device 10 was divided into half. It is the figure which cut | disconnected the structure of FIG. 1 by the II-II line | wire, and looked at the arrow direction. It is a perspective view of a circular tubular cover. FIG. 3 is a partial cross-sectional view of the lighting device 10. It is sectional drawing similar to FIG. 4 which shows the modification of this Embodiment. It is sectional drawing similar to FIG. 4 which shows the modification of this Embodiment. It is sectional drawing similar to FIG. 4 which shows the modification of this Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional perspective view showing the lighting device 10 in a half-divided state. FIG. 2 is a view of the configuration of FIG. 1 taken along the line II-II and viewed in the direction of the arrow.

  In FIG. 1, a base plate 11 is disposed on a ceiling surface (mounting surface) CL having a mounting opening CLa. The base plate 11 has an opening 11a at the center and a hole 11b through which a wood screw is inserted at a position away from the center. The back surface (back surface) of the substrate 12 is disposed in close contact with the lower surface of the base plate 11. A terminal block 13 is mounted in the opening 11a of the base plate 11 on the back surface of the substrate 12, and is disposed so as to be positioned in the mounting opening CLa of the ceiling surface CL. The terminal block 13 supplies power to the substrate 12 by being connected to a lamp line (AC power supply line) 14.

  In FIG. 2, an LED 15 as a first light source is disposed at the center of the surface of the disk-shaped substrate 12. On the other hand, LEDs 16 as second light sources are arranged in the circumferential direction around the surface of the substrate 12. A hatched area in FIG. 2 is a mounting surface of the reflecting structure 17. Note that CD is a capacitor constituting a power supply circuit required for the LEDs 15 and 16 and the like. In addition, necessary electronic components may be provided.

  In FIG. 1, a resin reflection structure 17 that is an optical path deflecting means is substantially annular and also serves as an exterior part, and has a cylindrical inner peripheral surface 17 a and a taper that goes radially outward as the distance from the substrate 12 increases. And an outer peripheral surface 17b. The outer peripheral surface 17b is a reflective surface, for example, white paint or a reflective film is deposited. The inner peripheral surface 17a may have a similar configuration. A groove 17c is formed in the vicinity of the peripheral edge of the outer peripheral surface 17b, and the lower end of a circular tubular cover 18 as shown in FIG. 3 is fitted thereto. The surface of the cover 18 is a rough surface (diffusion structure) like polished glass. The upper end of the cover 18 is in contact with the base plate 11. Therefore, the LED 16 is sealed in an annular space surrounded by the outer peripheral surface 17 b and the cover 18. It is preferable to provide an elastic member such as a rubber plate on at least one of the upper and lower surfaces of the cover 18.

  In the vicinity of the lower end of the inner peripheral surface 17a of the reflection structure 17, a shelf portion 17d protruding inward in the radial direction is formed, and the periphery of the disk-shaped protection plate 19 is supported here. The protection plate 19 has a circuit protection function on the substrate 12. The LED 15 is sealed in a cylindrical space surrounded by the inner peripheral surface 17 a and the protection plate 19. The protective plate 19 may have a diffusing function in order to relieve the graininess of the LED 15.

  The reflection structure 17 has a screw attachment hole 17e. The tip of the wood screw SC inserted into the screw mounting hole 17e is inserted through the hole 12a of the substrate 12 and the hole 11b of the base plate 11 (through hole provided in the contact portion between the optical path deflecting means and the substrate), and the ceiling The lighting device 10 is attached to the ceiling surface CL by being screwed into the surface CL.

  The lower surface of the reflecting structure 17 is recessed in a shallow dish shape, and an iron-based plate 20 is fixed thereto by bonding or screwing. Since the iron-based plate 20 has an opening that exposes the screw attachment hole 17e, the wood screw SC can be attached and detached while the plate 20 is attached.

  A resin-made diffusion cover plate 21 is attached so as to be fitted into the lower surface of the reflecting structure 17 that is recessed in a shallow dish shape. A magnet plate 22 is bonded to the upper surface of the diffusion cover plate 21, and the magnet plate 22 is attracted to the plate 20, thereby preventing an inadvertent drop. In addition to this, as a method of fixing the diffusion cover, a fitting method using a claw or a method of detaching by sliding in the rotation direction may be used.

  FIG. 4 is a partial cross-sectional view of the lighting device 10. With reference to FIG. 4, operation | movement of the illuminating device concerning this Embodiment is demonstrated. The LED 15 emits a light beam having a relatively high color temperature. The light emitted from the LED 15 travels so that a light beam having the highest intensity (shown by a dotted line) is directed in a direction perpendicular to the ceiling surface CL, passes through the diffusion plate 19 and the diffusion cover 21, and below the illumination device 10. Illuminate. Since the diffusion cover 21 covers the screw attachment hole 17e, the wood screw SC is not visually recognized from the outside, and is excellent in design.

  In contrast, the LED 16 emits a light beam having a lower color temperature than the LED 15. The light emitted from the LED 16 first proceeds so that the light beam having the highest intensity is directed in a direction perpendicular to the ceiling surface CL, but is reflected on the outer peripheral surface 17b of the reflecting structure 17. Of the reflected light, an angle θ formed by a light beam having the highest intensity (shown by a dotted line) and the vertical direction of the ceiling surface CL is 90 to 180 degrees.

  According to the present embodiment, since the LEDs 15 and 16 are arranged on the surface of the flat substrate 12, a thin lighting device can be obtained. Further, the angle θ formed between the light beam having the highest intensity among the light beams emitted from the LED 16 and reflected by the outer peripheral surface 17b and the vertical direction of the ceiling surface CL is 90 degrees to 180 degrees. In spite of the arrangement of 16, the downward illumination and the illumination on the ceiling surface CL can both be achieved, and the brightness of the space can be ensured.

  Furthermore, the illumination right under the lighting device 10 is enhanced by using white light having a relatively high color temperature from the LED 15, and at the same time, the illumination of the ceiling surface CL is made by using light having a lower color temperature from the LED 16. This can increase the healing effect. At this time, since the reflecting structure 17 is used as a partition of space division so that both lights are not mixed, the structure of the illuminating device 10 can be simplified and cost-reduced.

  FIG. 5 is a cross-sectional view similar to FIG. 4 showing a modification of the present embodiment. In the modification of FIG. 5, the outer peripheral surface 17b is formed from two tapered surfaces 17b1 and 17b2 with different inclination angles. Thereby, a part of the light beam emitted from the LED 16 is reflected by the taper surface 17b1 and proceeds in a direction corresponding to the inclination angle, and another part of the light beam emitted from the LED 16 is reflected by the taper surface 17b2. Thus, the degree of freedom of light distribution control when the ceiling surface CL is illuminated is improved.

  FIG. 6 is a cross-sectional view similar to FIG. 4 showing a modification of the present embodiment. In the modification of FIG. 6, the outer peripheral surface 17b is formed as an aspherical surface. Thereby, since the light emitted from the LED 16 travels in a direction corresponding to the aspherical surface, the degree of freedom of light distribution control when the ceiling surface CL is illuminated is further improved.

  FIG. 7 is a cross-sectional view similar to FIG. 4 showing a modification of the present embodiment. In the modification of FIG. 7, in addition to the outer peripheral surface 17b being an aspherical surface, the LED 16 provided on the substrate 12 is of a side emission type. Thereby, the light beam emitted from the LED 16 toward the inside of the illumination device 10 is reflected twice by the tapered surface 17b and emitted from the illumination device 10, so that light distribution control is free when the ceiling surface CL is illuminated. The degree is further improved. Moreover, the granular feeling of LED16 can be reduced.

  The present invention is not limited to the embodiments described in the specification, and other embodiments and modifications are apparent to those skilled in the art from the embodiments and ideas described in the present specification. It is. For example, the mounting surface of the lighting device is not limited to the ceiling surface but may be a wall surface.

DESCRIPTION OF SYMBOLS 10 Illuminating device 11 Base board 11a Opening 11b Hole 12 Board | substrate 12a Hole 13 Terminal block 14 Electric light line 15,16 LED
17 reflective structure 17a inner peripheral surface 17b outer peripheral surface 17b1, 17b2 taper surface 17c groove 17d shelf 17e hole 18 cover 19 protective plate 20 plate 21 diffusion cover 22 magnet plate CL ceiling surface CLa opening SC wood screw

Claims (11)

A substrate that can be mounted with the back side facing the mounting surface;
A first light source and a second light source disposed on a surface of the substrate;
Optical path deflecting means for changing the direction of the light beam emitted from the second light source,
An angle formed between the light beam having the highest intensity among the light beams emitted from the first light source and the light beam having the highest intensity among the light beams emitted from the second light source whose direction is changed by the optical path deflecting unit. Is 90 to 180 degrees.   The said board | substrate is substantially circular shape, The said 1st light source is arrange | positioned in the center area | region of the said board | substrate, and the said 2nd light source is arrange | positioned in the peripheral area | region of the said board | substrate. The lighting device described.   The lighting device according to claim 1, wherein the first light source and the second light source emit a light beam having the highest intensity in a direction perpendicular to the mounting surface.   The first light source emits a light beam having the highest intensity in a direction perpendicular to the mounting surface, and the second light source has the highest intensity in a direction inclined with respect to the normal line of the mounting surface. The illumination device according to claim 1, wherein the illumination device emits a high light beam.   The lighting device according to claim 1, wherein the light emitted from the second light source is changed in direction by the optical path deflecting unit and then transmitted through a circular tubular cover.   The lighting device according to claim 5, wherein the cover has a diffusion structure.   The lighting device according to claim 1, wherein the optical path deflecting unit spatially divides the first light source and the second light source.   The lighting device according to claim 1, wherein the optical path deflecting unit also serves as an exterior portion of the lighting device.   9. The lighting device according to claim 1, further comprising: a through hole in a contact portion between the optical path deflecting unit and the substrate, and fixing the lighting device to the mounting surface by inserting a screw into the through hole. The lighting device described in 1.   The lighting device according to claim 9, wherein the screw is covered with a detachable diffusion cover.   The lighting device according to any one of claims 1 to 10, wherein a power supply circuit portion is provided on the surface of the substrate, and a terminal block for connecting an AC power supply line is provided on the back surface of the substrate.

Images