JP2012256447A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve appropriate illuminance including the illuminance direct under a lighting fixture, in the lighting fixture with LEDs as light sources through improvement of ceiling-face and wall-face illuminance constituting brightness feeling of a space by carrying out optical control mainly over-wide-angle light distribution.SOLUTION: The lighting fixture with the LEDs as light sources is provided with: a fixture body 21; a shade 31 covering the fixture body 21; a light source portion 41 with LED light source groups 44 each constituted of a plurality of LEDs 42 arranged in a circumferential direction of the fixture body 21, the plurality of LED light source groups 44 being arranged with intervals in a direction from a center side section toward a peripheral side section of the fixture body 21; and a light reflecting portion 51 where light-reflecting bodies 52 each consisting of a first reflecting part 54 slanted toward a center side section of the fixture body 21 and continuously formed in a circumferential direction of the fixture body 21 and a second reflecting part 55 slanted toward a peripheral side section of the fixture body 21 and continuously formed in a circumferential direction of the fixture body 21 arranged between each two adjacent LED light source groups 44.

Description

  The present invention relates to a lighting fixture using an LED as a light source.

  In recent years, a light source using a light emitting diode (LED) has been developed as a light source of a lighting fixture (for example, Patent Document 1). LEDs have directivity and have a characteristic that the ½ illuminance angle is narrower than incandescent lamps and fluorescent lamps. The ½ illuminance angle is an opening angle at a position where the illuminance is ½ of the illuminance directly below the luminaire (direct illuminance) when the horizontal plane is irradiated vertically. This characteristic is not particularly problematic for lighting fixtures that place importance on direct illumination and task light, such as downlights and spotlights.

  On the other hand, in the case of a luminaire used as main illumination, such as a ceiling light, a sense of brightness of the entire space is required rather than direct illuminance or task light. It is known that the feeling of brightness of the entire space can be obtained by ensuring not only the illuminance directly below but also the illuminance on the wall surface and ceiling surface. However, when an LED is used as the light source of a luminaire used as the main lighting, it is difficult to distribute the light to the wall surface and ceiling surface due to the directivity of the LED, and it is difficult to secure the illuminance on the wall surface and ceiling surface. There is a problem that it is difficult to obtain a feeling of brightness. For this reason, when an LED is used as the light source, there is a problem in that there is a difference between the output (total luminous flux value) of the luminaire and the obtained brightness (illuminance and brightness).

  Conventionally, in order to solve this problem, there has been a tendency to use a method of ensuring the brightness of the entire space by securing the illuminance of the wall surface and the ceiling surface by using an LED having an output higher than originally required. However, this method consumes more power than necessary, and there is a problem that substantial energy saving performance is lowered.

  In addition, a lens is often combined with an LED in order to widen the illuminance angle and distribute the light to the wall surface and ceiling surface. However, materials such as acrylic and polycarbonate are used for the lens, and the total luminous flux value inherent to the LED is impaired by the transmittance of the material. For this reason, there exists a problem that energy-saving performance falls compared with the case where the light of LED is directly utilized without using a lens.

JP 2010-533961 gazette

  The present invention has been made to solve the above problems. The first object of the present invention is to perform optical control mainly on wide-angle light distribution in a luminaire using an LED as a light source, thereby improving the ceiling surface and wall surface illuminance constituting a sense of brightness in space, It is to realize appropriate illuminance including. The second object of the present invention is to enable LED light to be effectively exhibited and to improve energy saving performance by enabling wide-angle light distribution without using a lens.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, the first invention is a lighting fixture using an LED as a light source,
An instrument body;
A shade covering the instrument body;
LED light source groups composed of a plurality of LEDs arranged in the circumferential direction of the instrument body, a plurality of light source parts arranged at intervals in the direction from the center part of the instrument body to the peripheral part,
A first reflecting portion that is inclined toward a central portion of the instrument main body and continuously formed in a circumferential direction of the instrument main body, is inclined toward a peripheral edge side of the instrument main body, and the instrument main body The light reflection body having the second reflection portion formed continuously in the circumferential direction includes a light reflection portion disposed between the LED light source groups adjacent to each other.

2nd invention is 1st invention, Comprising:
The light reflecting portion includes a third reflecting portion formed continuously in the circumferential direction of the instrument body between the first reflecting portion and the second reflecting portion of the light reflector.

3rd invention is 2nd invention, Comprising:
The light reflecting portion may be configured such that at least one of the width, the height, and the inclination angle of the first reflecting portion, the second reflecting portion, or the third reflecting portion in each of the light reflecting bodies is the other light reflecting body. The width of the second reflecting part in the light reflector on the peripheral side of the instrument body is made different from the width, height or inclination angle of the first reflecting part, the second reflecting part or the third reflecting part in However, it was made wider than the width | variety of the 2nd reflection part in the light reflection body of the center part side of the said instrument main body.

4th invention is 1st-3rd invention, Comprising:
The light reflecting portion includes a plurality of LED arranging portions that integrally form a plurality of light reflecting bodies and expose the LEDs.

  As effects of the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the light directly irradiated from the LED is obtained by arranging the light reflector having the first reflecting portion and the second reflecting portion between the LED light source groups in the lighting apparatus using the LED as the light source. The light reflected by the shade or the shade is diffused by the light reflector from the central part direction of the instrument body toward the peripheral part of the instrument body, thereby enabling wide-angle light distribution. Thereby, the ceiling surface and the wall surface illuminance constituting the sense of brightness of the space are improved, and appropriate illuminance including directly below illuminance can be realized.
In addition, the LED light can be distributed at a wide angle without using a lens, so that the LED performance can be effectively exhibited and the energy saving performance can be improved.

  According to 2nd invention, a light reflection part is provided with the 3rd reflection part formed continuously in the circumferential direction of an instrument main body between the 1st reflection part and 2nd reflection part of a light reflector. Thereby, while suppressing the height of a light reflector and preventing the light unevenness of the shade by the shadow of a light reflector, the spreading | diffusion of light can be promoted by increasing the reflective surface of a light reflection part.

  According to 3rd invention, the width | variety of the 2nd reflection part in the light reflection body of the peripheral part side of an instrument main body was made wider than the width | variety of the 2nd reflection part in the light reflection body of the center part side of an instrument main body. Thereby, the light reflected toward the peripheral part direction of an instrument main body by the 2nd reflection part near the peripheral part of an instrument main body can be increased, and a ceiling surface and wall surface illumination intensity can further be improved.

  According to the fourth aspect of the invention, the light reflecting portion is formed with a plurality of LED reflectors that integrally form a plurality of light reflectors and exposes the LEDs. Thereby, a lighting fixture can be assembled easily.

The (A) side view of the lighting fixture 11 which concerns on 1st Embodiment of this invention (B) The perspective view seen from diagonally downward. The figure which shows a part of cross section which cut | disconnected the lighting fixture 11 in radial direction. Sectional drawing which expanded a part of instrument main body 21. FIG. The perspective view which turned the lower surface side of the instrument main body 21 up. The schematic diagram which shows distribution of the emitted light intensity of LED42. The schematic diagram which shows the light distribution of the lighting fixture 11 which concerns on 1st Embodiment of this invention. The schematic diagram which shows the light distribution when not using the light reflection part 51. FIG. The schematic diagram which shows the light distribution of the lighting fixture 11 which concerns on 2nd Embodiment of this invention. The schematic diagram which shows the light distribution of the lighting fixture 11 which concerns on 3rd Embodiment of this invention. The schematic diagram which shows the light distribution of the example of a change of the lighting fixture 11 which concerns on 3rd Embodiment of this invention.

  The lighting fixture 11 which concerns on 1st Embodiment of this invention is demonstrated using FIGS. 1-7. The luminaire 11 according to this embodiment is a luminaire that directly uses the light of the LED 42 without using a lens. As shown in FIG. 1, the luminaire 11 is a ceiling light that is directly attached to the ceiling. Below, the side which irradiates light is made into the lower surface side of the lighting fixture 11, and an upper surface side is demonstrated as an other side (ceiling side in an attachment state) on the lower surface side.

  As shown in FIGS. 1 and 2, the lighting fixture 11 mainly includes a fixture main body 21, a power supply device 61, a shade 31, a center cover 71, a light source portion 41, and a light reflecting portion 51. A donut-shaped shade 31 having a hole 32 in the center is attached to the lower surface side of the instrument body 21, and a center cover 71 is attached so as to cover the hole 32.

  As shown in FIGS. 2, 3, and 4, the fixture main body 21 constitutes the main body of the lighting fixture 11. The instrument body 21 is formed using a metal plate such as aluminum having thermal conductivity. The outer contour shape of the instrument main body 21 is a circle, and is provided with a light source mounting portion 22, a housing portion 23, and a mounting hole 24.

  The light source attachment part 22 is a part to which the light source part 41 and the light reflection part 51 are attached. The light source attachment portion 22 is provided in a region having a certain width from the edge portion along the circumferential direction of the instrument main body 21. Since the light source mounting part 22 is also a heat radiating part that transmits heat generated in the light source part 41 and releases it to the outside, the lower surface side of the light source mounting part 22, that is, the side on which the light source part 41 is mounted is in contact with the light source part 41. It is formed flat so as to increase the area. A first holding part 25 for holding the shade 31 is formed on the outer peripheral side of the light source attachment part 22.

  The housing part 23 is a part in which a power supply device 61 and a lighting device (not shown) for turning on the LEDs 42 of the light source unit 41 are housed. The accommodating part 23 is provided along the inner peripheral side of the light source attachment part 22. The accommodating portion 23 has a height and width for accommodating the power supply device 61, the lighting device, and the like. On the other hand, the accommodating part 23 is adjacent to the light source attaching part 22 to which the light source part 41 is attached, and when the accommodating part 23 blocks light from the light source part 41, the shadow of the accommodating part 23 is reflected on the shade 31. For this reason, the outer side of the accommodating part 23 is formed in a chamfered shape, and makes it difficult to block the light from the light source part 41. A second holding portion 26 for holding the shade 31 is formed on the lower surface side of the housing portion 23 and on the central portion side of the instrument main body 21.

  The mounting hole 24 is provided at the center of the instrument main body 21. The attachment hole 24 is formed for attaching an adapter (not shown) when attaching the lighting fixture 11 to the ceiling. When the lighting fixture 11 is attached to the ceiling, the adapter is attached to the ceiling wiring fixture (hanging ceiling) for the lighting fixture, and the adapter is attached so as to be inserted into the mounting hole 24.

  The power supply device 61 is a device for lighting the LED 42 of the light source unit 41 together with a lighting device (not shown) or the like. The power supply device 61 and the lighting device are accommodated in the accommodating portion 23. The power supply device 61 is provided with a connector 62. When the lighting fixture 11 is attached to the ceiling, it is connected to an adapter-side connector (not shown) so that an external power supply can be connected via the ceiling wiring fixture for the lighting fixture. Electrically connected. The lighting device and the light source unit 41 are electrically connected by an electric wire (not shown).

  The seed 31 is a member that covers the lower surface side of the instrument body 21, and is formed of a resin material having translucency. The shade 31 distributes light to the outside while reflecting and diffusing light from the light source unit 41. The overall shape of the shade 31 is a donut shape having a hole 32 in the center, and is a flat shape with a low vertical height.

  On the lower surface side of the shade 31, a lower surface side light transmitting portion 33 that transmits light from the light source portion 41 is formed. The lower surface side translucent part 33 is gently bulging toward the lower surface side. Further, when the shade 31 is attached to the instrument main body 21, a side-side translucent part 34 and an upper-surface side translucent part 35, which are portions projecting to the side of the instrument main body 21, are formed and transmit light. The part to be made is formed not only on the lower surface side but also on the side surface side and the upper surface side. For this reason, in the lighting state, it is possible to distribute light not only directly under the lighting fixture 11 but also to the periphery, wall surface, and ceiling surface. Around the hole 32 at the center of the shade 31, a center side light transmitting portion 36 bent toward the upper surface side is formed, and light distribution is possible from the center side light transmitting portion 36 toward the center of the hole 32. It has become.

  A first held portion 37 that is held by the first holding portion 25 of the instrument main body 21 is formed at the edge portion of the upper surface side light transmitting portion 35 of the shade 31, and the center side light transmitting portion 36 of the shade 31 is formed. A second held portion 38 that is held by the second holding portion 26 of the instrument body 21 is formed at the edge portion. The shade 31 is attached to the instrument main body 21 by holding the first held portion 37 in the first holding portion 25 and holding the second held portion 38 in the second holding portion 26.

  The center cover 71 is a member attached so as to cover the hole 32 of the shade 31 and is formed of a transparent resin material. The center cover 71 is gently swollen on the lower surface side. On the upper surface side of the center cover 71, colored or fine irregularities are formed, and a reflection surface 72 that reflects light is formed. A third held portion 73 for attaching the center cover 71 to the instrument main body 21 is formed on the peripheral portion of the center cover 71. The third held portion 73 is bent on the upper surface side, and the third held portion 73 is held in a fitted state on the outside of the second holding portion 26 of the instrument body 21, so that the center cover 71 is It is attached to the instrument body 21.

  In a state where the center cover 71 is attached to the instrument main body 21, the outer surface of the third held portion 73 of the center cover 71 faces the center side light transmitting portion 36 of the shade 31. Therefore, in the lighting state, a part of the light from the light source part 41 that has passed through the center side light transmitting part 36 of the shade 31 is guided from the third held part 73 of the center cover 71, and the peripheral part of the center cover 71 Will shine brightly. Since the upper surface side of the center cover 71 is a reflecting surface 72 that reflects light, the internal structure cannot be seen through the center cover 71 from the lower surface side.

  The light source unit 41 is configured by mounting a plurality of LEDs 42 as light sources on a substrate 43. As shown in FIGS. 2 and 3, each LED 42 is arranged toward the lower surface side, and no lens is attached to each LED 42, so that the light of each LED 42 is directly used by the light reflecting portion 51. It is configured. The board | substrate 43 is arrange | positioned through the heat conductive sheet (not shown) in the light source attachment part 22 of the instrument main body 21. FIG.

  As shown in FIG. 3 and FIG. 4, the plurality of LEDs 42 are arranged along the circumferential direction of the instrument body 21. In this embodiment, the outer contour shape of the instrument body 21 is circular. It is arranged in a circle. A set of LEDs 42 arranged in a circle form an LED light source group 44. In the present embodiment, four LED light source groups 44 are configured, and a first LED light source group 441, a second LED light source group 442, a third LED light source group 443, and a fourth LED light source group 444 are arranged from the center side of the instrument body 21. . A plurality of these are arranged concentrically at intervals in the direction from the center to the peripheral edge of the instrument main body 21 to constitute the light source 41.

  The light reflecting unit 51 is a member that reflects light emitted from the light source unit 41 and performs optical control mainly using wide-angle light distribution. As shown in FIGS. 3 and 4, the light reflecting portion 51 includes a plurality of light reflectors 52 and an inner reflector 53, and each light reflector 52 includes two adjacent LEDs described above. Arranged between the light source groups 44. Specifically, the first light reflector 521 is provided between the first LED light source group 441 and the second LED light source group 442, and the second light reflector 522 and the third LED light source are provided between the second LED light source group 442 and the third LED light source group 443. The third light reflectors 523 are disposed between the group 443 and the fourth LED light source group 444, respectively. The light reflector 52 and the inner reflector 53 are also shaped along the circumferential direction of the instrument body 21, and in this embodiment, the outer contour shape of the instrument body 21 is circular. 53 is arranged in a circle. That is, the first light reflector 521, the second light reflector 522, the third light reflector 523, and the inner reflector 53 are arranged concentrically. The inner reflector 53 is disposed closer to the center of the instrument body 21 than the first LED light source group 441.

  Each of the light reflectors 52 includes a first reflecting portion 54 and a second reflecting portion 55. The first reflecting portion 54 is inclined toward the central portion side of the instrument body 21 and is formed continuously in the circumferential direction of the instrument body 21. That is, the first reflecting portion 54 is a reflecting surface directed toward the central portion of the instrument body 21, and the reflecting surface is continuously formed in the circumferential direction of the instrument body 21. The second reflecting portion 55 is inclined toward the peripheral edge side of the instrument body 21 and is formed continuously in the circumferential direction of the instrument body 21. That is, the second reflecting portion 55 is a reflecting surface directed toward the peripheral edge side of the instrument body 21, and the reflecting surface is continuously formed in the circumferential direction of the instrument body 21. Specifically, the first light reflector 521 includes an eleventh reflecting portion 541 as the first reflecting portion 54 and a twelfth reflecting portion 551 as the second reflecting portion 55. Similarly, the second light reflector 522 has a twenty-first reflector 542 as the first reflector 54 and a twenty-second reflector 552 as the second reflector 55, and the third light reflector 523 has the first reflector 523. It has a thirty-first reflecting portion 543 as the first reflecting portion 54 and a thirty-second reflecting portion 553 as the second reflecting portion 55. The inner reflector 53 includes an inner reflector 531 that is inclined toward the peripheral edge of the instrument body 21 and is formed continuously in the circumferential direction of the instrument body 21.

  Here, since the 1st reflection part 54 and the 2nd reflection part 55 are continuously formed in the circumferential direction of the instrument main body 21, a reflection surface is ensured widely compared with the case where a reflection surface is individually formed in each LED42. can do. As a result, the light from the LED 42 that is a point light source can be effectively diffused, and light can be distributed not only directly under the lighting fixture 11 but also to the periphery, wall surface, and ceiling surface, and with less uneven distribution. Light is possible.

  In addition, since there is a space between the light reflecting portion 51 and the shade 31 and each light reflector 52 of the light reflecting portion 51 is not configured to partition each LED light source group 44, the light emitted from a certain LED light source group 44 Will be further reflected by the light reflector 52 located away from the shade 31. This also makes it possible to effectively diffuse the light from the LED 42 that is a point light source, enabling light distribution not only directly under the lighting fixture 11 but also to the periphery, wall surface, and ceiling surface, and with less uneven distribution. Light is possible.

  The light reflecting portion 51 is formed by thermoforming a thermoplastic resin sheet having light reflectivity. As shown in FIGS. 3 and 4, the first light reflector 521, the second light reflector 522, the third light reflector 523, and the inner reflector 53 are integrally formed and 4 in the circumferential direction. Divided to ensure moldability and assembly. The light reflecting portion 51 has a plurality of LED placement portions 57 that are holes for exposing the LEDs 42 at positions corresponding to the plurality of LEDs 42. For this reason, if the light reflection part 51 is arrange | positioned on the board | substrate 43 of the light source part 41, it will be arrange | positioned in the state which LED42 exposed on the light reflection part 51, and the assembly of the lighting fixture 11 becomes easy.

  Next, the light distribution of the lighting fixture 11 according to the present embodiment will be described with reference to FIGS. FIG. 5 is a schematic diagram showing a distribution of light emission intensity of a general LED 42, and shows the directivity of the LED 42. Each line in FIG. 5 indicates the luminous flux and the emission intensity. Although the light from the LED 42 is actually irradiated in the three-dimensional direction, FIG. 5 shows the light distribution only in the two-dimensional direction. As shown in FIG. 5, the emission intensity is relatively high (the emission intensity is high) on the vertical line from the LED 42 and in an area up to about 20 degrees with respect to the vertical line (actually a substantially conical area). However, it can be seen that the emission intensity decreases when the region is around 40 degrees with respect to the perpendicular (medium emission intensity), and the emission intensity decreases significantly when the region exceeds 60 degrees with respect to the perpendicular (low emission intensity). .

  6 and 7 are views for explaining the function of the light reflecting portion 51 of the lighting fixture 11 according to the present embodiment. FIG. 6 is a schematic diagram showing light distribution of the lighting fixture 11 according to the present embodiment. FIG. 7 is a schematic diagram illustrating light distribution when the light reflecting portion 51 of the lighting fixture 11 according to the present embodiment is not used. Although the light from the LED 42 is actually irradiated in the three-dimensional direction, FIGS. 6 and 7 show the light distribution only in the two-dimensional direction. 6 and 7, the arrangement of the first LED light source group 441, the second LED light source group 442, the third LED light source group 443, and the fourth LED light source group 444 is the same as that of the lighting fixture 11 according to the present embodiment. A virtual shade 131 is arranged on the lower surface side (upper side in the figure) and the peripheral edge side (right side in the figure). In the lighting fixture 11 according to the present embodiment, the shade 31 is not a flat surface, but in FIG. 6 and FIG. 7, the virtual shade 131 is a flat surface in order to simplify the light distribution. The distribution of the light emission intensity of the LED 42 is as shown in FIG. 5, but lines and reflected light indicating a light beam having a low light emission intensity are omitted as appropriate except for those necessary for the description.

  First, the case where the light reflection part 51 is not used will be described with reference to FIG. When the light reflection unit 51 is not used, light from the first LED light source group 441, the second LED light source group 442, the third LED light source group 443, and the fourth LED light source group 444 is directly irradiated to the shade 131. For this reason, light is evenly distributed on the lower surface side (the upper side in the drawing) of the shade 131, and the illuminance directly below the lighting fixture is sufficiently secured. However, the light irradiated to the peripheral side (the right side in the drawing) is small, and even if it is irradiated, the light with low emission intensity is the center. For this reason, there is little light distribution to a wall surface or a ceiling surface, and it becomes a lighting fixture which cannot ensure the illumination intensity of a wall surface or a ceiling surface. When this luminaire is used as main illumination, it is difficult to obtain a sense of brightness of the entire space.

  Next, as shown in FIG. 6, the case of the lighting fixture 11 according to the present embodiment using the light reflecting portion 51 will be described. When the light reflecting portion 51 is used, light from the LED light source group 44 (the first LED light source group 441, the second LED light source group 442, the third LED light source group 443, and the fourth LED light source group 444) is directly applied to the shade 131. In addition, a part of the light is reflected by the second reflecting portion 55 (the twelfth reflecting portion 551, the twenty-second reflecting portion 552, the thirty-second reflecting portion 553) or the inner reflecting portion 531, and is on the peripheral side (right side in the drawing). The light that is irradiated on the surface increases. For this reason, light distribution to a wall surface or a ceiling surface increases rather than the case where the light reflection part 51 is not used, and it becomes a lighting fixture which can ensure the illumination intensity of a wall surface or a ceiling surface. When this lighting fixture 11 is used as main illumination, the brightness feeling of the whole space improves.

  In addition, when the light reflecting portion 51 is used, the light from the LED light source group 44 (the first LED light source group 441, the second LED light source group 442, the third LED light source group 443, and the fourth LED light source group 444) is transmitted to the shade 131. A part of the light is reflected and reflected to the first reflecting portion 54 (the eleventh reflecting portion 541, the twenty-first reflecting portion 542, and the thirty-first reflecting portion 543), and the light irradiated to the central portion side (the left side in the drawing) increases. (Not shown). For this reason, it becomes a lighting fixture distributed more widely in the center part side (illustration left) than the case where the light reflection part 51 is not used.

  According to the lighting fixture 11 according to the present embodiment described above, in the lighting fixture 11 using LEDs as the light source, the LED light source group 44 (first LED light source group 441, second LED light source group 442, third LED light source group 443, and fourth LED). Light reflectors 52 (first light reflector 521, second light reflector 522, and third light reflector 523) each having a first reflector 54 and a second reflector 55 are disposed between the light source groups 444). Thus, the light directly irradiated from the LED light source group 44 and the light reflected on the shade 31 are reflected by the light reflector 52 (the first light reflector 521, the second light reflector 522, and the third light reflector 523). It diffuses from the central part direction of the instrument main body 21 toward the peripheral part direction of the instrument main body 21 to enable wide-angle light distribution. Thereby, the ceiling surface and the wall surface illuminance constituting the sense of brightness of the space are improved, and appropriate illuminance including directly below illuminance can be realized.

  Moreover, since it becomes possible to distribute the light of LED by wide angle without using a lens, the performance of LED42 can be exhibited effectively and energy saving performance can be improved.

  Next, the lighting fixture 11 which concerns on 2nd Embodiment of this invention is demonstrated using FIG. In the lighting fixture 11 according to the present embodiment, the light reflecting portion 51 includes the first reflecting portion 54 (first light reflecting body 52 (first light reflecting member 521, second light reflecting member 522, third light reflecting member 523)). 11 reflection part 541, 21st reflection part 542, 31st reflection part 543) and second reflection part 55 (12th reflection part 551, 22nd reflection part 552, 32nd reflection part 553). The point which provided the 3rd reflection part 56 (The 13th reflection part 561, the 23rd reflection part 562, the 33rd reflection part 563) formed continuously in a direction is greatly different from the lighting fixture 11 which concerns on 1st Embodiment. ing. A description of portions common to the lighting fixture 11 according to the first embodiment is omitted.

  As shown in FIG. 8, in the case of the lighting fixture 11 according to the present embodiment, from the LED light source group 44 (the first LED light source group 441, the second LED light source group 442, the third LED light source group 443, and the fourth LED light source group 444). Is reflected by the shade 131 and partially reflected by the third reflecting portion 56 (the thirteenth reflecting portion 561, the twenty-third reflecting portion 562, and the thirty-third reflecting portion 563) and on the peripheral side (right side in the drawing). The irradiated light increases (see the reflected light of the thirty-third reflective portion 563). For this reason, light distribution to a wall surface or a ceiling surface increases rather than the case where the light reflection part 51 is not used, and it becomes a lighting fixture which can ensure the illumination intensity of a wall surface or a ceiling surface. When this lighting fixture 11 is used as main illumination, the brightness feeling of the whole space improves.

  Moreover, in the case of the lighting fixture 11 which concerns on this embodiment, rather than the light reflection part 51 (refer FIG. 6) of the lighting fixture 11 which concerns on 1st Embodiment, the light reflector 52 (1st light reflector 521,). The height of the second light reflector 522 and the third light reflector 523) can be suppressed. In the light reflection part 51 of the lighting fixture 11 according to the first embodiment, the light reflector 52 may block the light from the LED light source group 44, and the shade 31 may have uneven light. In the case of the lighting fixture 11 according to the form, such light unevenness is prevented.

  According to the lighting fixture 11 according to the present embodiment described above, the height of the light reflector 51 is suppressed, the light unevenness of the shade 31 due to the shadow of the light reflector 51 is prevented, and the reflection surface of the light reflector 51 is provided. Increasing it can promote diffusion of light.

  Next, the lighting fixture 11 which concerns on 3rd Embodiment of this invention is demonstrated using FIG. 9, FIG. In the lighting fixture 11 according to the present embodiment, the light reflecting portion 51 is configured such that the width of the second reflecting portion 55 in the light reflecting body 52 on the peripheral edge side of the fixture body 21 is the light reflecting body 52 on the center portion side of the fixture body 51. The point which makes it wider than the width | variety of the 2nd reflection part 55 in is significantly different from the lighting fixture 11 which concerns on 1st Embodiment. The width of the second reflecting portion 55 is a length along the direction of the peripheral portion from the center portion of the instrument main body 21 and along the surface of the second reflecting portion 55. A description of portions common to the lighting fixture 11 according to the first embodiment is omitted.

  As shown in FIG. 9, in the case of the luminaire 11 according to the present embodiment, the height of each light reflector 52 is mainly set to the first light reflector 521 <second light reflector 522 <third light reflector 523. By adjusting the width of the third reflecting portion 56 and the inclination angle of the second reflecting portion 55 (relative to the instrument main body 21) in each light reflector 52, the width of the second reflecting portion 55 is changed to the twelfth reflecting portion 551. <22nd reflection portion 552 <32nd reflection portion 553. Therefore, the light from the LED light source group 44 (the first LED light source group 441, the second LED light source group 442, the third LED light source group 443, and the fourth LED light source group 444) is reflected by the shade 131, and then the second reflecting portion 55 ( It becomes easy to reflect on the twelfth reflecting portion 551, the twenty-second reflecting portion 552, and the thirty-second reflecting portion 553), and the light irradiated on the peripheral portion side (right side in the drawing) increases. As shown in FIG. 9, light with high emission intensity is also irradiated to the peripheral edge side (right side in the drawing) (see the reflected light of the 22nd reflecting portion 552 and the 32nd reflecting portion 553). For this reason, the light distribution to a wall surface or a ceiling surface further increases, and it becomes a lighting fixture which can ensure the illumination intensity of a wall surface or a ceiling surface. When this lighting fixture 11 is used as main illumination, the brightness feeling of the whole space improves.

  FIG. 10 shows a modification example of the lighting fixture 11 according to the present embodiment. In the case of FIG. 10, the inclination angle of the twelfth reflecting portion 551 of the first light reflector 521 is mainly changed with respect to FIG. As a result, the light having a higher emission intensity is irradiated to the peripheral edge side (right side in the drawing) more than in FIG. 9 (see the reflected light of the twelfth reflecting portion 551, the twenty-second reflecting portion 552, and the thirty-second reflecting portion 553). .)

  According to the lighting fixture 11 according to the present embodiment described above, the light reflected toward the peripheral portion of the fixture main body 21 can be increased by the second reflecting portion 55 close to the peripheral portion of the fixture main body 21, and the ceiling can be increased. The surface and wall surface illuminance can be further improved.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said Example, A various change is possible. For example, although the luminaire 11 is a round shape, it may be a square shape or other shapes. Moreover, you may apply to a pendant light etc. besides a ceiling light.

  The light source unit 41 of the present embodiment is configured by four LED light source groups 44, but the number of LED light source groups 44 is not limited. In addition, each LED light source group 44 and each light reflector 52 are arranged along the circumferential direction of the instrument body 21, but this is because the light distribution by the LED light source group 44 is substantially uniform with respect to the shade 31. As long as the light distribution is substantially uniform, the arrangement of the LED light source groups 44 and the light reflectors 52 may not be strictly arranged along the circumferential direction of the instrument body 21. . For example, even when the lighting fixture 11 (the fixture main body 21) is elliptical, rectangular, or the like, the arrangement of the LED light source groups 44 and the light reflectors 52 strictly follows the circumferential direction of the fixture main body 21. It may not be an arrangement.

  The shape, width, inclination angle and the like of each part of the light reflecting part 51 are not limited to those of the present embodiment. The shape, width, inclination angle, and the like of each portion of the light reflecting portion 51 can be appropriately changed according to the arrangement of the light source portion 41, the shape of the shade 31, etc., or the direction in which light is to be distributed.

DESCRIPTION OF SYMBOLS 11 Lighting fixture 21 Appliance main body 22 Light source attachment part 23 Storage part 24 Mounting hole 25 1st holding part 26 2nd holding part 31 Sed 32 hole 33 Lower surface side light transmission part 34 Side surface side light transmission part 35 Upper surface side light transmission part 36 Center side translucent part 37 First held part 38 Second held part 41 Light source part 42 LED
43 Substrate 44 LED Light Source Group 51 Light Reflector 52 Light Reflector 53 Inner Reflector 54 First Reflector 55 Second Reflector 56 Third Reflector 57 LED Placement Unit 61 Power Supply Device 62 Connector 71 Center Cover 72 Reflecting Surface 73 Third held part 131 Sede

Claims (4)

A lighting apparatus using LED as a light source,
An instrument body;
A shade covering the instrument body;
LED light source groups composed of a plurality of LEDs arranged in the circumferential direction of the instrument body, a plurality of light source parts arranged at intervals in the direction from the center part of the instrument body to the peripheral part,
A first reflecting portion that is inclined toward a central portion of the instrument main body and continuously formed in a circumferential direction of the instrument main body, is inclined toward a peripheral edge side of the instrument main body, and the instrument main body A light reflector having a second reflector formed continuously in the circumferential direction of the light reflector disposed between the adjacent LED light source groups;
A lighting fixture comprising:   The said light reflection part was provided with the 3rd reflection part continuously formed in the circumferential direction of the said instrument main body between the said 1st reflection part and the said 2nd reflection part of the said light reflector. The lighting fixture as described in.   The light reflecting portion may be configured such that at least one of the width, the height, and the inclination angle of the first reflecting portion, the second reflecting portion, or the third reflecting portion in each of the light reflecting bodies is the other light reflecting body. The width of the second reflecting part in the light reflector on the peripheral side of the instrument body is made different from the width, height or inclination angle of the first reflecting part, the second reflecting part or the third reflecting part in The lighting fixture according to claim 2, wherein the width is wider than the width of the second reflecting portion in the light reflector on the center side of the fixture main body.   The said light reflection part is a lighting fixture of any one of Claim 1 to 3 provided with the some LED arrangement | positioning part which exposes LED while forming a some light reflector integrally.

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