JP6610878B2 - lighting equipment - Google Patents

Description

  Embodiments described herein relate generally to a lighting fixture using a light emitting module.

  Conventionally, as a lighting fixture, for example, there is a lighting fixture for facilities such as a downlight installed on a ceiling of a facility.

  In such a lighting fixture, in order to secure the illuminance of the floor surface, it is common to adopt a structure that efficiently irradiates light downward using a reflector or the like, and irradiating the ceiling side with light It was not considered.

JP 2013-201080 A

  The problem to be solved by the present invention is to provide a luminaire that can irradiate light on the ceiling side while maintaining the amount of downward light irradiation that is the main irradiation direction.

Luminaire embodiment comprises an instrument body, a light emitting module, diffusion cover and reflector. The instrument body has a light source mounting surface on the lower surface. The light emitting module includes a substrate and a plurality of light emitting elements mounted on the substrate, and is disposed on the light source mounting surface. The diffusion cover has a front surface portion facing the light emitting module, and a side surface portion protruding from the periphery of the front surface portion toward the light source mounting surface, and covers the light emitting module. The reflector has an incident opening facing the front surface portion of the diffusion cover.
The diffusion cover is positioned between the light source mounting surface and the reflector, and irradiates light from the side surface portion to the instrument back side through the side space between the light source mounting surface and the reflector.

  According to the present invention, it can be expected that the ceiling side is irradiated with light while maintaining the downward irradiation amount that is the main irradiation direction.

It is sectional drawing of the lighting fixture which shows one Embodiment. It is sectional drawing of a lighting fixture same as the above. It is the perspective view seen from the upper direction of the lighting fixture same as the above. It is a perspective view of the decomposition | disassembly state seen from the downward direction of the lighting fixture same as the above. It is the perspective view seen from the downward direction of the same lighting fixture. It is a table | surface which shows the relationship between the vertical angle of the diffusion cover of a lighting fixture same as the above, and a transparent cover, and a light beam. It is a light distribution diagram at the time of using the diffusion cover and transparent cover of a lighting fixture same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 7.

  As shown in FIG. 2, the lighting fixture 10 is a ceiling-embedded downlight. A ceiling plate 12 that constitutes the ceiling is provided below the fixture installation unit 11 that is a ceiling structure, and the lighting fixture 10 is embedded and installed in the embedded hole 13 provided in the ceiling plate 12. Furthermore, the lighting fixture 10 is attached to two suspension bolts 14 protruding from the fixture installation section 11.

  As shown in FIGS. 2 to 5, the lighting fixture 10 includes a fixture main body 17, a fixture support 18, a reflector mounting body 19, a mounting frame 20, and a reflector 21.

  The instrument body 17 includes a chassis 23, a radiator 24 attached to the lower part of the chassis 23, a light source part 25 disposed on the lower surface of the radiator 24, and a power supply part 26 attached to the upper part of the chassis 23. It has. Note that the instrument body 17 has a substantially rectangular outer shape around the horizontal direction. Hereinafter, a direction in which one side faces each other is a first direction a, and a direction in which the other side faces each other. A direction that intersects the first direction a is referred to as a second direction b.

  The chassis 23 is formed of a metal plate. The chassis 23 includes a mounting portion 29 on which the power supply unit 26 is mounted, and radiator mounting portions 30 for mounting the radiator 24 on both sides in the first direction a of the mounting portion 29 are provided.

  The radiator 24 is made of, for example, a metal material such as aluminum and integrally formed by extrusion along the second direction b. The radiator 24 includes a light source mounting portion 32 formed in a square shape and a plurality of fins 33 protruding from the upper surface of the light source mounting portion 32. A rectangular light source mounting surface 32a is formed on the lower surface of the light source mounting portion 32. The plurality of fins 33 are juxtaposed at predetermined intervals along the first direction a, and the plurality of fins 33 are opened upward and in the second direction b, respectively. The side surface of the radiator 24 in the first direction “a” is attached to the radiator attachment portion 30 of the chassis 23.

  The light source unit 25 includes a light emitting module 35 disposed on the light source mounting surface 32a of the radiator 24, and a diffusion cover 36 that covers the light emitting module 35.

  The light emitting module 35 includes a square substrate 37, for example, a square substrate 37, and a plurality of light emitting elements 38 mounted on the front surface of the substrate 37. A plurality of light emitting elements 38 constitute a light emitting part and a light emitting surface. For the light emitting element 38, for example, an LED is used. The back surface of the substrate 37 is disposed on the light source mounting surface 32a of the radiator 24 via an insulating sheet s (see FIG. 1).

  As shown in FIGS. 1 to 5, the diffusion cover 36 has translucency and light diffusibility. For example, a predetermined light diffusibility is obtained by mixing a diffusing material in a resin material having translucency. The diffusion cover 36 has a quadrangular shape facing the light emitting module 35, for example, a square and flat front part 36a, and a peripheral side part 36b protruding from the periphery of the front part 36a toward the back side. ing. A plurality of bosses 36c protrude from the front surface 36a on the back side of the front surface 36a, and protrusions 36d protrude from the four front corners of the front surface 36a.

  The diffusion cover 36 covers the light emitting module 35, is disposed on the light source mounting surface 32a of the radiator 24, and is fastened and fixed to the radiator 24 with a plurality of screws 39 that pass through the plurality of bosses 36c of the diffusion cover 36. The substrate 37 is positioned and sandwiched between the diffusion cover 36 that is tightened and fixed with a plurality of screws 39 and the light source mounting surface 32a of the radiator 24, and the back surface of the substrate 37 is pressed against the light source mounting surface 32a of the radiator 24. ing.

  The outer shape of the front surface portion 36a of the diffusion cover 36 is larger than the outer shape of the substrate 37 of the light emitting module 35, and the outer shape of the side surface portion 36b of the diffusion cover 36 is substantially equal to the outer shape of the light source mounting surface 32a of the radiator 24. The side surface portion 36b of the diffusion cover 36 faces the light source mounting surface 32a of the radiator 24 and protrudes toward the light source mounting surface 32a of the radiator 24, but contacts the light source mounting surface 32a of the radiator 24. They may be in contact with each other.

  The light diffusibility of the diffusion cover 36 is such that when light from each light emitting element 38 passes through the diffusion cover 36 and is irradiated onto the floor surface, strong light from each light emitting element 38 is projected onto a partial area of the floor surface. Thus, the luminance unevenness is set so as not to occur.

  The power supply unit 26 includes a power supply circuit 40 that receives AC power, converts the power into a predetermined DC power, supplies the power to the light emitting module 35, and causes the light emitting element 38 to emit light. The power supply circuit 40 is accommodated in a power supply box 41 mounted on the mounting portion 29 of the chassis 23.

  The instrument support 18 includes an instrument support 43 and an attachment frame attachment 44 that is bent downward from both ends of the instrument support 43. The instrument support portion 43 is disposed on the lower surface of the mounting portion 29 of the chassis 23 so that both ends protrude from both sides of the instrument body 17 in the first direction a, and is fixed to the chassis 23 with screws. Has been. An instrument mounting portion 45 for mounting the instrument main body 17 to the instrument installation portion 11 is provided on both ends of the instrument support portion 43 protruding from both sides of the instrument main body 17 in the first direction a. The instrument mounting portion 45 is configured by a mounting hole 46 through which the suspension bolt 14 is inserted.

  In addition, the reflector mounting body 19 is bent upward from a rectangular reflector support portion 48 that is long in the second direction b of the instrument body 17 and both side portions of the reflector support portion 48 in the first direction a. An instrument body attaching portion 49 that is attached to the instrument body 17 is provided. The reflector support portion 48 is disposed below the diffusion cover 36, contacts the protrusion 36d of the diffusion cover 36, and a predetermined gap is provided between the front surface portion 36a of the diffusion cover 36. In the center of the reflector support 48, an opening 50 is formed to face the light source 25 (light emitting module 35). The opening 50 is formed in a square having a size larger than the outer shape of the light emitting module 35 and smaller than the diffusion cover 36. Reflector attachment portions 51 for attaching the reflector 21 are provided on both side portions of the reflector support portion 48 in the longitudinal direction, which is the first direction a. The reflector mounting portion 51 includes a plurality of mounting holes 52. And since the reflector attachment body 19 is opened in the 2nd direction b, the side part 36b of the diffusion cover 36 is exposed to the instrument back side.

  Further, the mounting frame 20 is formed in a cylindrical shape. The mounting frame 20 includes a cylindrical tube portion 54 and a flange portion 55 that protrudes from the lower end of the tube portion 54 in the outer diameter direction. The cylinder portion 54 is attached to the attachment frame attachment portions 44 at both ends of the instrument support 18. The flange portion 55 can come into contact with the lower surface of the ceiling board 12 when the lighting fixture 10 is installed in the embedded hole 13.

  In addition, the reflector 21 is configured by integrally combining a decorative frame 57 and a reflector plate 58.

  The decorative frame 57 protrudes in the outer diameter direction from the disk-shaped upper surface portion 59, the inclined cylindrical side surface portion 60 that expands downward from the upper surface portion 59 that is the light irradiation direction, and the lower end of the side surface portion 60. A decorative frame portion 61 is provided. The decorative frame portion 61 is configured such that the diameter of the decorative frame portion 61 is larger than the diameter of the embedding hole 13 and can contact the lower surface of the ceiling plate 12. In the center of the upper surface portion 59 of the decorative frame 57, an opening 62 that faces the diffusion cover 36 of the light source portion 25 is formed. The opening 62 is a quadrangle that is larger than the outer shape of the light emitting module 35 and smaller than the outer shape of the diffusion cover 36, for example, a square. A plurality of attachment holes 59 a and 59 b are provided on both sides of the opening 62 on both sides in the second direction b around the upper surface portion 59 of the decorative frame 57. For example, a pair of attachment holes 59a are provided at symmetrical positions with respect to the central axis of the decorative frame 57, and a pair of attachment holes 59b are provided at symmetrical positions different from the pair of attachment holes 59a. . The pair of attachment holes 59a are provided in a circular hole shape in the circumferential direction, and the pair of attachment holes 59b are provided in a round hole shape.

  The reflection plate 58 includes a disk-shaped upper surface portion 63 and an inclined cylindrical side surface portion 64 that expands downward from the upper surface portion 63 that is the light irradiation direction. An opening 65 that faces the light source unit 25 is formed at the center of the upper surface portion 63 of the reflection plate 58. The opening 65 is a quadrangle that is larger than the outer shape of the light emitting module 35 and smaller than the outer diameter of the diffusion cover 36, and is formed in, for example, a square. A plurality of insertion holes 63a and 63b are formed around the upper surface portion 63 of the reflector 58 on both sides in the second direction b with respect to the opening 65 corresponding to the positions of the mounting holes 59a and 59b. Yes. The insertion hole 63a is provided in a long hole shape so that the attachment hole 59a is exposed, and the insertion hole 63b is provided in a round hole shape so that the attachment hole 59b is exposed.

  Then, the upper surface portion 63 and the side surface portion 64 of the reflecting plate 58 are arranged on the inner surface side of the upper surface portion 59 and the side surface portion 60 of the decorative frame 57, and the upper surface portion 63 of the reflecting plate 58 is provided on the upper surface portion 59 of the decorative frame 57. It is fixed by screws 66. The screws 66 are disposed on both sides in the first direction a with respect to the openings 62 and 65 of the upper surface portions 59 and 63. The openings 62 and 65 are configured as an incident opening 21a of the reflector 21.

  The reflector 21 is attached to the reflector attachment portion 51 of the reflector attachment body 19 with a plurality of screws 67 and nuts 68 as attachment means.

  Next, installation of the lighting fixture 10 will be described.

  In FIG. 2, with only the reflector 21 removed from the instrument body 17, the instrument body 17 is inserted into the embedding hole 13 of the ceiling plate 12, and the instrument mounting portions 45 (attachment holes 46) on both sides of the instrument support 18 are inserted. The end of the suspension bolt 14 is passed through, and a nut 70 is screwed onto the end of the suspension bolt 14 as an attachment, and the instrument support 18 is attached to the suspension bolt 14. This operation is performed between the mounting frame 20 and the instrument body 17. When the appliance body 17 is inserted into the embedding hole 13 of the ceiling plate 12, a power line wired in advance on the ceiling side is connected to the power source unit.

  After installation of the instrument body 17, the reflector 21 is inserted inside the attachment frame 20, and the reflector 21 is attached to the reflector attachment portion 51 with a plurality of screws 67.

  At this time, the reflector 67 is inserted into the mounting frame 20 by temporarily screwing the screw 67 for passing through the mounting hole 59a of the reflector hole shape of the reflector 21 into the reflector mounting portion 51 (screwed in a loosened state). By passing the large-diameter portion of the 21-hole mounting hole 59a through the screw 67, and rotating the reflector 21 to move the narrow groove portion of the mounting hole 59a of the daruma-hole shape to the screw 67. The reflector 21 can be temporarily fixed by being hooked on the screw 67.

  Therefore, for example, by temporarily releasing the temporarily-attached reflector 21, the screw 67 that passes through the mounting hole 59a is fastened and fixed to the reflector mounting portion 51, or the screw 67 is passed through the mounting hole 59b to fix the reflector. It can be fastened and fixed to the mounting portion 51, and workability can be improved. Further, by inserting the screw 67 into the attachment hole 59b and screwing it into the reflector attachment portion 51, the reflector 21 can be prevented from rotating, and the attachment hole 59a of the reflector 21 can be prevented from being detached from the screw 67.

  When the lighting device 10 is turned on, if the light emitting element 38 emits light, the light from the light emitting element 38 enters the diffusion cover 36, is diffused, and exits from the surface of the diffusion cover 36.

  The light emitted from the surface of the front surface portion 36a of the diffusing cover 36 enters the inside of the reflector 21 through the incident opening 21a of the reflector 21, and is irradiated downward from the lower surface opening of the reflector 21 in the main irradiation direction.

  At this time, by using the diffusion cover 36, when the light from each light emitting element 38 is transmitted through the diffusion cover 36 and irradiated to the floor surface, the strong light from each light emitting element 38 is applied to the floor surface. It is possible to prevent uneven illuminance from being projected on the partial area.

  Further, a part of the light from the light emitting element 38 is directly incident on the side surface portion 36b, or is reflected by the inner surface of the diffusion cover 36 and incident on the side surface portion 36b, and is emitted from the surface of the side surface portion 36b. Alternatively, part of the light incident on the front surface portion 36a of the diffusion cover 36 is guided to the side surface portion 36b and emitted from the surface of the side surface portion 36b. The light emitted from the surface of the side surface part 36b of the diffusion cover 36 is applied to the back side of the appliance, that is, the ceiling side space between the appliance installation unit 11 and the ceiling board 12 is applied.

  Thus, by irradiating light on the ceiling side space between the appliance installation part 11 and the ceiling board 12, the ceiling side space becomes bright, and the workability at the time of the maintenance work in the ceiling side space can be improved.

  In addition, in the case of a ceiling structure without the ceiling plate 12, it is installed on the ceiling so that the lighting fixture 10 is exposed. In this case, by irradiating light from the lighting fixture 10 to the ceiling side as well, Can be brightened.

  FIG. 6 shows the result of testing the relationship between the vertical angle and the luminous flux using the diffusion cover 36 and the transparent cover of the comparative example. A vertical angle of 0 ° is a direct downward direction, a vertical angle of 90 ° is a horizontal direction, and a vertical angle of 180 ° is a direct upward direction. FIG. 7 shows a light distribution diagram when the diffusion cover 36 and the transparent cover of the comparative example are used. The horizontal axis is the vertical angle, and the vertical axis is the luminous flux.

  The total luminous flux with a vertical angle of 0 ° to 180 ° is the same value for both the diffusion cover 36 and the transparent cover of the comparative example, but the luminous flux with a vertical angle of 0 ° to 90 ° is less than the transparent cover of the comparative example. In the case of the luminous flux having a vertical angle of 90 ° to 180 °, the diffusion cover 36 increased more than the transparent cover of the comparative example.

  That is, the ratio of the light to the back side of the instrument was increased by 0.9% for the diffusion cover 36 compared to the transparent cover of the comparative example.

  Therefore, in the transparent cover of the comparative example, the ratio of light to the back side of the instrument with respect to the total luminous flux is 1.4% or less, but the diffusion cover 36 has a ratio of light to the back side of the instrument with respect to the total luminous flux of 1.5% or more. be able to.

  Therefore, according to the luminaire 10 of the present embodiment, it is possible to irradiate light on the ceiling side while maintaining the downward irradiation amount that is the main irradiation direction.

  Furthermore, since the diffusion cover 36 is located between the light source mounting surface 32a and the reflector 21, the diffuser cover 36 passes through the side space between the light source mounting surface 32a and the reflector 21 from the side surface 36b of the diffusion cover 36 to the back of the instrument. The side can be illuminated.

  Further, since a gap is provided between the front surface portion 36a of the diffusion cover 36 and the reflector mounting body 19, a part of the light emitted from the front surface portion 36a of the diffusion cover 36 is irradiated to the instrument back side from the clearance. be able to.

  Further, since the gap is provided between the reflector mounting body 19 and the reflector 21, a part of the light emitted from the front surface portion 36a of the diffusion cover 36 can be irradiated from the gap to the instrument back side.

  It should be noted that a part of the side surface portion of the reflector mounting body 19 arranged in the first direction a of the diffusion cover 36 is cut out to expose the side surface portion 36b of the diffusion cover 36, thereby irradiating the device back side. The proportion of light that can be increased.

  The lighting fixture 10 is not limited to a ceiling-embedded lighting fixture but can also be applied to a direct ceiling lighting fixture or a ceiling suspended lighting fixture.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lighting equipment
17 Instrument body
21 Reflector
21a Entrance aperture
32a Light source mounting surface
35 Light emitting module
36 Diffusion cover
36a Front part
36b Side view
37 Board
38 Light emitting element

Claims (1)

An instrument body having a light source mounting surface on the bottom surface;
A light emitting module having a substrate and a plurality of light emitting elements mounted on the substrate and disposed on the light source mounting surface;
A diffusion cover having a front surface portion facing the light emitting module and a side surface portion projecting from the periphery of the front surface portion toward the light source mounting surface;
A reflector having an incident aperture facing the front portion of the diffuser cover ;
Equipped with,
The diffusion cover is located between the light source mounting surface and the reflector, and irradiates light from the side surface to the instrument back side through a side space between the light source mounting surface and the reflector. Characteristic lighting equipment .

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