JP7129519B2 - Lighting fixtures and light source units - Google Patents

Description

Application of Article 30, Paragraph 1 of the Patent Act From July 30, 2018 to August 3, 2018, Endo Lighting Co., Ltd. illuminated the lighting fixtures invented by Naoyuki Suzuki and Atsushi Kado in the conference room of Soka City Hall. I installed it on the ceiling of the Soka City Hall conference room to verify the feeling of being in the middle of the day.

The present invention relates to lighting fixtures and light source units.

One of the lighting fixtures arranged on the ceiling surface illuminates downward, for example, the floor side, and also illuminates upward, for example, the ceiling surface side (see Patent Document 1). This lighting fixture includes one or more reflective elements defining an aperture in the fixture body, light passing through the aperture illuminates downward, and light reflected by the reflective element illuminates the ceiling surface above.

JP 2017-513193 A

In the lighting fixtures described above, the lighting unit is shown installed in a hanging socket as an embodiment. In this case, although it is possible to illuminate a wide area of the ceiling by suspending the light source from the ceiling, the position of the light source is lower than the ceiling, so the ceiling does not look neat. Alternatively, when it is embedded, there is a problem that it cannot illuminate a wide range of ceilings.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and an object of the present invention is to provide a lighting fixture that can illuminate downward and brightly illuminate upward with light whose light distribution is controlled in consideration of brightness. do.

In order to solve the above problems, a lighting fixture according to the present invention is a lighting fixture comprising: a light source; and a light control member arranged inside the lighting fixture and inclined downward toward the outside of the lighting fixture. and the light control member controls the first partially emitted light, which is part of the emitted light from the light source, to travel upward.

With the above configuration, the lighting fixture according to the present invention can provide a lighting fixture that can illuminate the upper part brighter than before with controlled light.

1 is a bottom perspective view showing a lighting fixture according to a first embodiment of the present invention; FIG. FIG. 2 is a bottom perspective view showing a state in which the fixture body and the light source unit of the lighting fixture according to FIG. 1 are separated; (a) Cross-sectional schematic diagram of the lighting fixture according to FIG. 1 when the light source unit is attached to the fixture body, (b) When the light source unit is separated from the fixture body of the lighting fixture according to FIG. Cross-sectional schematic diagram showing a state pulled downward FIG. 2 is a plan view schematically showing a light source section in which light sources are arranged on a light source substrate; Upper perspective view showing a cover portion related to the light source unit Schematic diagram showing the case where the light source unit and the cover unit are viewed from one of the short sides. In the arrangement of the light source unit and the cover unit in FIG. 6, (a) diagram showing paths of light illuminating downward and sideways, (b) diagram showing paths of light illuminating upward and sideways 7A and 7B are diagrams showing the paths of light in the arrangement of the light source unit and the cover unit in FIG. (a) Upper perspective view showing the lens portion, (b) View of the lens portion from the short side, (c) Diagram showing the partially curved Fresnel lens, (d) Partially curved surface corresponding to the portion constituting the lens portion Schematic diagram showing a state in which a Fresnel lens is divided (a) Plan view schematically showing a convex lens, (b) Plan view schematically showing a Fresnel lens, (c) Plan view schematically showing a curved Fresnel lens Schematic diagram showing the case where the light source unit and the cover unit are viewed from one of the short sides according to the second embodiment of the present invention. (a) Diagram showing paths of light illuminating downward and sideways, (b) Diagram showing paths of light illuminating upward and sideways in the arrangement of the light source section and the cover section in FIG. FIG. 11 is a diagram showing the path of light in the arrangement of the light source section and the cover section in FIG. 11 (a diagram showing the path of light shown in FIGS. 12A and 12B together) Schematic diagram showing a case where a light source unit and a cover unit are viewed from one short side according to a modification of the present invention.

<1. First Embodiment>
A lighting fixture 10 according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the luminaire 10 has an elongated shape as an example, is directly attached or embedded in a ceiling surface as an example of an attachment target, and emits light toward the ceiling surface side and the floor side. to irradiate. That is, the lighting fixture 10 is a lighting fixture capable of realizing a 4π light distribution lighting fixture that illuminates all directions including the upward direction using a 2π light distribution light source that illuminates one direction centered on the downward direction. The lighting fixture 10 includes a fixture body 30 and a light source unit 50 .

<1.1. Instrument body 30>
As shown in FIG. 2, the device main body 30 has a box-like appearance with a housing recess CO formed on one surface, and includes a housing 31, a spring receiver 33a, and a spring receiver 33b.

The housing 31 is a box-shaped member that constitutes the appearance of the instrument main body 30 and has a housing recess CO formed on one surface. The housing 31 is formed by extruding or bending a sheet metal. As shown in FIGS. 2, 3(a) and 3(b), the housing 31 has a long side plate portion 31b and a long side plate portion 31c erected from the long sides of a long bottom plate portion 31a. A short-side plate portion 31d and a short-side plate portion 31e are erected from the short sides of the bottom plate portion 31a. The apparatus main body 30 may be of a direct attachment type in which the bottom plate portion 31a is installed on the ceiling surface, or may be of an embedded type in which the lower ends of the long side plate portions 31b and 31c are aligned with the ceiling surface. .

In the following description, for the sake of convenience, when the lighting fixture 10 is attached to the ceiling surface, the direction toward the ceiling as viewed from the lighting fixture 10 will be referred to as "up", and the opposite direction to the floor will be referred to as "down". "Upward" light means light having an upward component and may include obliquely upward light, and "downward" light means light having a downward component. An obliquely downward light may be included. Further, a cross section when viewed from the short-side plate portion 31d to the short-side plate portion 31e is referred to as a "reference view" (schematically indicated by a dashed arrow SV in FIG. 5), and the right side of the reference view is simply The left side is simply referred to as the "left side", the outer surfaces of the right and left sides of the light source unit are referred to as the "outside", and the portion surrounded by the outer surface of the lighting fixture is referred to as the "inside".

As shown in FIG. 3A, a pedestal 37b is arranged on the bottom surface 31aa, which is the lower surface of the bottom plate portion 31a, and a spring bearing 33b is arranged on the lower surface of the pedestal 37b. The spring receiver 33b is a spring bracket, and the mounting spring portion 57b of the light source unit 50 is engaged. As with the spring receiver 33b, the spring receiver 33a is arranged on the lower surface of a pedestal (not shown) attached to the bottom surface 31aa. The spring receiver 33a is a spring bracket, and the mounting spring portion 57a of the light source unit 50 is engaged. The spring receiver 33a and the spring receiver 33b are formed by punching or bending a metal plate. The pedestal 37a and the pedestal 37b have a function of raising the spring receiver 33a and the spring receiver 33b to approach the mounting spring portion 57a and the mounting spring portion 57b.

As shown in FIG. 2, the bottom plate portion 31a is provided with a plurality of wire holes which are exposed from the ceiling surface or the like and through which wires such as the power cable 15 for supplying power to the lighting fixture 10 are passed. ing. A power terminal block (not shown) is arranged on the bottom surface 31aa, and the power cable 15 is connected to the power terminal block, which is passed from the outside of the instrument body 30 into the instrument body 30 through the wire hole. A proximal end of the cable 35a is electrically connected to the power terminal block, and the power cable 15 connected to the power terminal block and the cable 35a are electrically connected. The cable 35a has a connector 35b on the tip side.

<1.2. Light source unit 50>
As shown in FIGS. 2, 3A, and 3B, the light source unit 50 includes a support 51, a light source section 53, a power supply section 55, a mounting spring section 57a, a mounting spring section 57b, and a diffusion cover. It has a cover portion 59 which is an example.

<Support 51>
The support 51 is a long plate-shaped member formed by extrusion molding of a metal material such as an aluminum alloy, and functions as a heat sink for dissipating heat generated by the light source section 53 . A light source unit 53 is arranged on the lower surface of the support member 51, and a power source unit 55, mounting spring portions 57a, and mounting spring portions 57b are arranged on the upper surface.

<Light source unit 53>
As shown in FIGS. 3A, 3B, and 4, the light source unit 53 has a long light source substrate 53a and a plurality of light sources 53b arranged in a row at intervals in the longitudinal direction on the lower surface of the light source substrate 53a. It will be distributed. The light source 53b is, for example, a surface-mounted LED (Light Emitting Diode).

<Power supply unit 55>
The power supply unit 55 has a function of converting AC power supplied from the outside of the lighting fixture 10 via the power cable 15 into DC power for driving the light source 53b, and supplying the DC power to the light source 53b. A proximal end of a cable 58a is electrically connected to the power supply unit 55, and the cable 58a has a connector 58b on the distal end. By connecting the connector 35b and the connector 58b, electric power can be supplied to the power supply unit 55 from the outside.

<Mounting Spring Portion 57a, Mounting Spring Portion 57b>
The mounting spring portion 57a is a member that engages with the spring receiver 33a of the instrument main body 30, and includes, for example, a double torsion spring formed by bending a spring wire. By engaging the mounting spring portion 57a with the spring receiver 33a, the light source unit 50 is pulled toward the fixture main body 30 by the elastic force of the double torsion spring. Thereby, the light source unit 50 is attached to the fixture main body 30 in such a manner that at least part of the light source unit 50 is accommodated in the accommodation recess CO. The mounting spring portion 57b is a member that engages with the spring receiver 33b that the instrument main body 30 has. The configuration and function of the mounting spring portion 57b are the same as those of the mounting spring portion 57a.

<Cover portion 59>
The cover portion 59 has a function of dividing the light emitted from the light source 53b into upward and downward directions, a function of reflecting, and a function of transmitting and diffusing the divided light. As a result, the light emitted from the light source 53b can illuminate the downward direction, and can also illuminate the lateral direction and the upward direction.

As shown in FIGS. 2 and 5 , the cover portion 59 includes a tubular portion 590 having openings at both ends, and an end plate portion 598 and an end plate portion 599 closing both openings of the tubular portion 590 . The end plate portion 598 and the end plate portion 599 are made of polycarbonate, for example, are translucent white, and have a light transmittance of 65% to 75%, for example.

As shown in FIGS. 5 and 6, the cylindrical portion 590 includes an engaging portion 591, an engaging portion 592, an upper cover portion 593, an upper cover portion 594, a lower cover portion 595, a lens portion 597, and a second reflector. A reflector 601 and a reflector 602 are provided as examples.

The engaging portion 591 and the engaging portion 592 are portions with which the support 51 is engaged, and are made of polycarbonate, for example, and are white and opaque. As shown in FIG. 6, the engaging portion 591 has a reflecting plate 591a which is one of the reflecting plates arranged in the vertical direction so as to face the light source 53b. It has a reflector 592a which is one of the reflectors arranged in the vertical direction so as to face each other. With respect to part of the light emitted from the light source 53b, the reflecting plate 591a and the reflecting plate 592a allow the angle formed between the surface of the light source 53b and the lower end of the reflecting plate 591a and the surface of the light source 53b to reflect the surface of the light source 53b. At least part of the light emitted in the direction below the cutoff angle θ4 (see FIG. 6) formed with the lower end of the reflector 592a is reflected and prevented from entering the user's field of view directly. It is possible to prevent the occurrence of glare. The surfaces of the reflectors 591a and 592a facing the light source 53b are curved surfaces that match a part of the elliptic curve OV with one focus FP1 at the center of the surface of the light source 53b when viewed from the reference viewing direction. The other focal point FP2 of the elliptical curve OV is set on the optical axis OA of the light source 53b and at the center of the upper plate portion 595h described later, but is not limited to this and may be changed according to the desired light distribution control. may As for the elliptic curve OV, a formula corresponding to the desired light distribution control may be used.

The engaging portion 591 has a substantially U-shaped receiving portion 591b, and the engaging portion 592 has a substantially U-shaped receiving portion 592b facing the receiving portion 591b. The support 51 is inserted and supported in the space formed by the receiving portions 591b and 592b.

The upper cover parts 593 and 594 and the lower cover part side plate lower parts 595b and 595c form a light transmissive outer surface. The upper cover portion 593 is a portion that is connected to the engaging portion 591 and includes the upper portion of the left side plate of the cover portion 59 . The upper cover portion 594 is a portion that is connected to the engaging portion 592 and includes the upper portion of the right side plate of the cover portion 59 . The upper cover portion 593 and the upper cover portion 594 are made of polycarbonate as an example, are colorless and transparent, and have a light transmittance of 92% as an example. In the upper cover portion 593 and the upper cover portion 594, the light transmittance is higher than that of the bottom plate portion 595a and side plate lower portions 595b and 595c of the lower cover portion 595, so that the light emitted from the light source 53b is The outgoing light reflected upward by the reflector 602 can efficiently illuminate the ceiling surface above, improving the sense of brightness. In addition, since the light passing through the upper cover portions 593 and 594 does not travel directly downward, the user does not feel uncomfortable glare despite the high light transmittance. That is, it is possible to prevent the occurrence of glare. From the viewpoint of glare, the upper cover part may be omitted, but it has the effect of preventing the light source from being reflected on the ceiling when the light diffusion of the ceiling is low, and the upper cover part has the effect of a dust cover. Therefore, in this embodiment, the upper cover portion is slightly diffusive.

5 and 6, the lower cover portion 595 has a substantially rectangular parallelepiped shape, is connected to the upper cover portion 593 and the upper cover portion 594, and constitutes substantially the lower half of the cover portion 59. be. The lower cover part 595 is made of polycarbonate, for example, is translucent white, and has a light transmittance of 65% to 75%, for example. The lower cover part 595 is molded by extrusion as an example.

The lower cover portion 595 includes a bottom plate portion 595a, a side plate lower portion 595b, a side plate lower portion 595c, a side plate middle portion 595d, a side plate middle portion 595e, a swash plate portion 595f, a swash plate portion 595g, and an upper plate portion 595h.

The bottom plate portion 595 a is a long plate-like portion corresponding to the bottom plate of the cover portion 59 . The side plate lower portion 595b and the side plate lower portion 595c are portions that stand up from the long sides of the bottom plate portion 595a. The swash plate portion 595f is a portion that protrudes obliquely upward inside the cover portion 59 from the upper end portion of the side plate lower portion 595b. The swash plate portion 595g is a portion that protrudes obliquely upward inside the cover portion 59 from the upper end portion of the side plate lower portion 595c. The upper plate portion 595h is a plate-like portion that is continuous with the swash plate portion 595f and the swash plate portion 595g and parallel to the bottom plate portion 595a. The side plate middle portion 595 d is a portion that continues upward from the upper end portion of the side plate lower portion 595 b and is connected to the lower end of the upper cover portion 593 . The side plate middle portion 595 e is a portion that continues upward from the upper end portion of the side plate lower portion 595 c and is connected to the lower end of the upper cover portion 594 .

The reflector 601 is one of the light control members, has a mirror surface, and is attached on the swash plate portion 595f with the mirror surface facing up. The reflecting plate 602 is one of the light control members, has a mirror surface, and is attached on the swash plate portion 595g with the mirror surface facing up. The reflecting plate 601 and the reflecting plate 602 have a function of controlling a part of the light emitted from the light source 53b to travel upward with respect to the horizontal direction. This makes it possible to illuminate a wide area from the light source to the ceiling, which improves the brightness of the ceiling. The reflecting plate 601 and the reflecting plate 602 are made of aluminum, but may be made of other materials having a function of reflecting light. In addition, the reflecting plate 601 and the reflecting plate 602 may be formed on the swash plate portion 595f and the swash plate portion 595g by other methods such as vapor deposition, instead of sticking.

The lens unit 597 controls the partial emission light L21 (details will be described later) emitted from the light source 53b to be reflected by the reflectors 601 and 602. It is arranged so as to be continuous with each lower end of the reflecting plate 592 a in the portion 592 . As an example, the lens portion 597 is made of polycarbonate, is white translucent, and has a light transmittance of 90%.

As shown in FIGS. 9A and 9B, the lens portion 597 includes a partially curved Fresnel lens portion 597a, a partially curved Fresnel lens portion 597b, and a lens pedestal portion 597c.

The lens pedestal portion 597c is an elongated plate-like member and has a protruding portion 597d that protrudes downward. The protruding portion 597d has a function of entering a recess and restricting positional deviation in the left-right direction when the lens portion 597 is arranged at a concave fixing position. The partially curved Fresnel lens portion 597a and the partially curved Fresnel lens portion 597b are partial curved Fresnel lenses obtained by dividing the curved Fresnel lens 65 shown in FIG. 9(c) in half as shown in FIG. 9(d). 65a and a partially curved Fresnel lens 65b.

Here, the curved Fresnel lens is a lens having the same function as the Fresnel lens, but has the following differences. That is, a Fresnel lens 63 as shown in FIG. 10B, which is an example of a Fresnel lens, is a convex lens 61 having a cross-sectional shape as shown in FIG. It has a cross-sectional shape arranged in a plane. On the other hand, a curved Fresnel lens 65, which is an example of a curved Fresnel lens, is a convex lens having a cross section as shown in FIG. It has a reduced shape. Here, by reducing the thickness of each lens and providing a space 67 surrounded by a dashed line in FIG. 8, the light emitted from the light source 53b and reflected by the reflectors 591a and 592a can travel through the space 67, hit the lens, and be guided in an unintended direction. You can prevent it from happening.

Although the curved Fresnel lens 65 shown in FIG. 10(c) and the curved Fresnel lens 65 shown in FIG. 9(c) are different in shape, FIGS. It is the figure shown typically in order to demonstrate the curved Fresnel lens.

<1.3. Path of Light>
In the lighting device 10 configured as described above, the path along which light emitted from the light source 53b passes will be described with reference to FIGS. 6, 7(a), 7(b) and 8. FIG.

Here, in the following description, θ1 is the angle between the optical axis OA of the light source 53b and the long side edge LE1 of the reflector 601 on the side closer to the light source 53b, and the optical axis OA. It represents the angle formed by the long side edge LE2 of the reflector 602 closer to the light source 53b. θ2 represents an angle formed between the long side edge LE1 and the lower end BE1 of the reflector 591a, and an angle formed between the long side edge LE2 and the lower edge BE2 of the reflector 592a. θ3 represents an angle formed between the lower end BE1 and the upper end of the reflecting surface of the reflector 591a, and an angle formed between the lower end BE2 and the upper end of the reflecting surface of the reflecting plate 592a. θ1, θ2, θ3, and θ4 are, for example, θ1=25.7 degrees, θ2=25.3 degrees, θ3=21.7 degrees, and θ4=39 degrees, but are not limited to these. It may be appropriately adjusted according to the ratio of the light that should travel upward and the light that should travel downward.

The emitted light emitted from the light source 53b includes a partial emitted light L21 that is an example of the first partial emitted light, a partial emitted light L15 that is an example of the second partial emitted light, and a partial emitted light L15 that is an example of the third partial emitted light. It includes emitted light L11 (see FIG. 8).

Partially emitted light L11 of the emitted light emitted from the light source 53b passes through the lens pedestal portion 597c of the lens portion 597 and the upper plate portion 595h of the cover portion 59 without being reflected by the reflectors 591a and 592a. Light. The partial emitted light L11 is emitted from the light source 53b within a range of approximately θ1 in the reference view. The partially emitted light L11 reaches the bottom plate portion 595a, is diffused, and mainly illuminates the lower part of the lighting device 10. As shown in FIG.

As shown in FIG. 12A as an example, the partial emitted light L31 is, of the emitted light emitted from the light source 53b, not reflected by the reflectors 591a and 592a, the reflectors 721 and 722, This is the light that passes through the transmitting portion 701 and the upper plate portion 743, and is the light that is emitted within the range of approximately θ11 with reference vision. The partially emitted light L31 reaches the bottom plate portion 595a, is diffused, and mainly illuminates the lower part of the lighting device 10a.

The partial emitted light L15 is light emitted from the light source 53b and emitted within the range of θ3 in reference vision. It is reflected by any of the plates 592a, passes through the lens base portion 597c and the upper plate portion 595h, and passes through the focal point FP2. The partially emitted light L15 reaches the bottom plate portion 595a, the side plate lower portion 595b, and the side plate lower portion 595c, is diffused, and mainly illuminates the downward and diagonally downward portions of the lighting device 10. FIG.

The presence of the reflectors 591a and 592a can prevent the light emitted from the light source 53b within the range of θ3 shown in FIG. 6 from directly entering the field of view of the user. That is, the luminaire 10 can reduce the amount of light that enters the line of sight of a person whose elevation angle is about θ4 or more, and can emit light that is easy on the eyes.

The partial emitted light L21 is the light emitted from the light source 53b within the range of θ2 in the reference view. It is controlled to reach within the range of the surfaces of the reflectors 601 and 602 so as to enter the curved Fresnel lens portion 597a and the partially curved Fresnel lens portion 597b and be reflected by the reflectors 601 and 602. . The partially emitted light L21 reaches the reflectors 601 and 602, is reflected, and travels above the horizontal direction. Most of the partially emitted light L21 reaches the upper cover portion 593 and the upper cover portion 594, is transmitted or diffused, and mainly illuminates the upward and diagonally upward direction of the lighting device 10. FIG. Part of the partially emitted light L21 reaches the side plate middle portions 595d and 595e, is diffused, and mainly illuminates the sides and oblique top of the lighting device 10. FIG. Since the reflecting plate 601 and the reflecting plate 602 are inclined downward toward the outside, the partially emitted light L21 becomes light slightly obliquely upward from the horizontal, and can illuminate a wide area of the ceiling.

As described above, according to the lighting fixture 10, a lighting fixture with a 4π light distribution that illuminates in all directions is created by using a light source with a 2π light distribution that illuminates in one direction to generate the partially emitted light L21 that illuminates upward. It can be realized, and the sense of brightness can be improved by brightening the ceiling.

<2. Second Embodiment>
In the first embodiment, the lens portion 597 including the partially curved Fresnel lens portion 597a and the partially curved Fresnel lens portion 597b, and the reflectors 601 and 602 with flat surfaces are used. The material, shape and structure of 597 and reflectors 601 and 602 may be varied.

FIG. 11 shows a tubular portion 590a according to the second embodiment. The cylindrical portion 590a differs from the cylindrical portion 590 according to the first embodiment in that (1) the lens portion 597 is replaced with a transmission portion 701 that does not have a lens function, and (2) the surface is flat. The difference is that instead of the reflectors 601 and 602, reflectors 721 and 722 having curved surfaces are used as an example of the second reflector. A swash plate with a curved surface that can support the reflectors 721 and 722 instead of the swash plate portions 595f and 595g when the transmission portion 701 and the reflectors 721 and 722 are used. A portion 741 and a swash plate portion 742 are used, and an upper plate portion 743 having a shape connectable to the swash plate portion 741 and the swash plate portion 742 is used instead of the upper plate portion 595h.

<2.1. Reflector 721, Reflector 722>
The reflecting plate 721 has a mirror surface, and is a member attached on the swash plate portion 741 with the mirror surface facing upward. The reflecting plate 722 is a member that has a mirror surface and is attached on the swash plate portion 742 with the mirror surface facing upward. The reflecting plate 721 and the reflecting plate 722 are made of aluminum, but may be made of other materials having a function of reflecting light. In addition, the reflecting plates 721 and 722 may be formed on the swash plate portion 741 and the swash plate portion 742 by other methods such as vapor deposition instead of sticking. As shown in FIG. 11, the surface of the reflector 721 is a curved surface that coincides with a part of the parabola PA1 with the light source 53b as the focal point in the reference view. The surface of the reflecting plate 722 is a curved surface that coincides with a part of the parabola PA2 with the light source 53b as the focal point in reference viewing. Each axis of the parabola PA1 and the parabola PA2 is inclined at an angle θ10 with respect to the surface (horizontal plane) of the light source 53b. Although the angle θ10 is set to 5 degrees as an example, it may be changed as appropriate according to the direction in which light should be reflected by the reflectors 721 and 722 .

Note that the shape of the reflectors 721 and 722 in the reference view is not limited to a parabola, and any shape that becomes more horizontal toward the outside can be used, and the reflected light can be directed farther to improve brightness.

<2.2. Path of Light>
FIG. 11 and FIG. 12(a) show the path through which the light emitted from the light source 53b passes in the lighting fixture according to the present embodiment (not shown, but referred to as "the lighting fixture 10a" for convenience of identification for ease of identification). , FIG. 12(b) and FIG.

Here, θ11 is the angle formed by the optical axis OA of the light source 53b and the long side edge LE11 of the reflector 721 on the side closer to the light source 53b when viewing the cylindrical portion 590a as a reference, and the angle between the optical axis OA and the reflector 722. It represents the angle formed with the long side edge LE12 closer to the light source 53b. θ12 represents an angle formed between the long side end LE11 and the lower end BE11 of the reflector 591a, and an angle formed between the long side end LE12 and the lower end BE12 of the reflector 592a, in the reference view of the cylindrical portion 590a. θ13 represents an angle formed between the lower end BE11 and the upper end of the reflecting surface of the reflecting plate 591a and an angle formed between the lower end BE12 and the upper end of the reflecting surface of the reflecting plate 592a in the reference view of the cylindrical portion 590a. The shapes of the lower ends of the reflecting plate 591a and the reflecting plate 592a can be changed according to the shape of the transmissive portion 701 as compared with the case of the first embodiment. θ11, θ12, and θ13 are, for example, θ11=29.0 degrees, θ12=21.1 degrees, and θ13=26.3 degrees, but are not limited to these. It may be adjusted as appropriate according to the ratio of light to be applied.

As shown in FIG. 13, the emitted light emitted from the light source 53b includes a partially emitted light L41 that is an example of the first partially emitted light, a partially emitted light L35 that is an example of the second partially emitted light, and a third partially emitted light. It includes the partially emitted light L31, which is an example of the partially emitted light.

As shown in FIG. 12A as an example, the partial emitted light L31 is, of the emitted light emitted from the light source 53b, not reflected by the reflectors 591a and 592a, the reflectors 721 and 722, It is the light that passes through the transmitting portion 701 and the upper plate portion 743 . The partially emitted light L31 is emitted from the light source 53b within a range of approximately θ11 in the reference view. The partially emitted light L31 reaches the bottom plate portion 595a, is diffused, and mainly illuminates the lower part of the lighting device 10a.

As shown in FIG. 12A as an example, the partial emitted light L35 is light emitted from the light source 53b and emitted within the range of θ13 in reference vision. It is reflected by any of the plates 592a, passes through the transmissive portion 701 and the upper plate portion 743, and passes through the focal point FP2. The partially emitted light L35 reaches the bottom plate portion 595a, the side plate lower portion 595b, and the side plate lower portion 595c, is diffused, and mainly illuminates the downward and diagonally downward portions of the lighting device 10a.

Here, due to the presence of the reflector 591a and the reflector 592a, part of the emitted light emitted from the light source 53b is reduced to the angle formed by the surface of the light source 53b and the lower end of the reflector 591a with respect to the surface of the light source 53b. , and a cutoff angle θ14 (see FIG. 11), which is the angle between the surface of the light source 53b and the lower end of the reflector 592a. is prevented, it is possible to prevent the occurrence of glare. That is, the luminaire 10a can emit light that is easy on the eyes by reducing the amount of light that enters the line of sight of a person with an elevation angle of about θ4 (cutoff angle).

The partial emitted light L41 is the light emitted from the light source 53b within the range of θ12 in the reference view, and is incident on the transmission portion 701 as shown in FIG. 12B as an example. and pass through. The partially emitted light L41 reaches the reflecting plate 721 and the reflecting plate 722, is reflected, and travels upward from the horizontal direction. Most of the partially emitted light L41 reaches the upper cover portion 593 and the upper cover portion 594, is transmitted or diffused, and mainly illuminates the upward and diagonally upward direction of the lighting device 10a. Part of the partially emitted light L41 reaches the side plate middle portions 595d and 595e, is diffused, and mainly illuminates the sides and diagonally above the lighting device 10a.

As described above, according to the lighting fixture 10a, as shown in FIG. 13, a 4π light distribution lighting fixture that illuminates all directions using a 2π light distribution light source that illuminates one direction can be realized. Brightness can be improved by increasing the brightness.

<2.3. Supplement>
In the luminaire 10a, the transmission part 701 is used instead of the lens part 597 used in the luminaire 10. FIG. The partially curved Fresnel lens portion 597a and the partially curved Fresnel lens portion 597b in the lens portion 597 inevitably have an edge portion, but it is difficult to form an edge as designed in the molding process, and the edge is less than the design. It may have a dull shape. Light incident on such an edge portion may be reflected, refracted, or diffusely reflected differently from the design, and may be uncontrollable. As a result, the light utilization efficiency can be reduced. On the other hand, since the lighting device 10a does not use a curved Fresnel lens, it is possible to avoid the problem of a decrease in light utilization efficiency at the edges. In addition, in the lighting device 10a, light can be controlled by using the transmitting portion 701 without using a curved Fresnel lens and by making the surface shapes of the reflectors 721 and 722 curved.

<3. Modified example and others>
Although the embodiments of lighting fixtures according to the present invention have been described above, the illustrated lighting fixtures can be modified, for example, as follows, and the present invention is limited to the lighting fixtures shown in the above embodiments. Of course not.

(1) In the above-described embodiment, the engaging portion 591 has the reflecting plate 591a and the reflecting plate 592a. It may extend to the positions of the reflectors 591a and 592a.

(2) As an example, as shown in FIG. 14, the lighting equipment includes a light source 53b and a light control member arranged inside the outer surface of the lighting equipment and inclined with respect to the horizontal. It is sufficient to control the first partial emitted light, which is a part of the emitted light from 53b, to travel upward with respect to the horizontal. The light control member may be a reflector 721 and a reflector such as the reflector 721 as shown in FIG. 14 as an example. The degree of inclination of the light control member may be adjusted so as to achieve a desired light distribution. According to this configuration, it is possible to provide a lighting fixture capable of illuminating the upper area brighter than before with controlled light.

In this case, the partially reflected light L35 reflected by the reflectors 591a and 592a in the second embodiment reaches the upper cover portions 593 and 594 as shown in FIG. Further, the light control member may be, for example, a lens that controls the first partially emitted light to travel upward with respect to the horizontal.

(3) In the above-described embodiment, an example of the transmittance of each part constituting the cover part is shown, but the transmittance is not limited to this, and is determined according to the specifications of the lighting fixtures 10 and 10a to be realized. It can be changed as appropriate. Also, the materials can be appropriately changed according to the specifications of the lighting fixtures 10 and 10a to be realized.

(4) In the above-described embodiment, the lighting fixture is described as having an elongated shape.

(5) In the above-described embodiment, in the lighting fixture, an example in which the fixture main body and the light source unit can be separated has been described, but this is not the only option, and they may be integrated, for example.

(6) In the above-described embodiment, the example of using two pairs of the mounting spring portion and the spring bearing has been described, but the number is not limited to two pairs, and three or more pairs may be used.

(7) The configuration of each part of the present invention is not limited to the above embodiments and modifications, and various modifications are possible within the technical scope described in the claims. For example, the configuration of each part of the lighting fixture described above can be applied to various lighting fixtures that are not limited to LED lighting fixtures.

(8) You may partially combine the above-mentioned embodiment and each modification.

<4. Invention Extraction>
Examples of inventions extracted from the above embodiments and modifications include the following inventions.

(1) A lighting fixture according to an embodiment of the present invention is a lighting fixture comprising a light source, and a light control member arranged inside the lighting fixture and inclined downward toward the outside of the lighting fixture. and the light control member controls the first partially emitted light, which is part of the emitted light from the light source, to travel upward.

With this configuration, it is possible to provide a lighting fixture that can illuminate the upper area brighter than before with controlled light.

(2) The lighting fixture further includes a reflecting plate arranged in a vertical direction, and the reflecting plate reflects downward a second partially emitted light that is part of the emitted light from the light source. good too.

With this configuration, it is possible to provide a lighting fixture that can illuminate the lower part and brightly illuminate the upper part with light whose light distribution is controlled more than before.

(3) The cross-section of the reflector may have a surface corresponding to a part of an ellipse with the light source as one of the focal points.

With this configuration, it is possible to provide a lighting fixture that can illuminate the lower part and brightly illuminate the upper part with light whose light distribution is controlled more than before.

(4) The reflecting plate may reflect at least a part of the light irradiated to the surface of the light source at a cutoff angle or less as the second partially emitted light.

With this configuration, it is possible to reduce the incidence of the second partial emitted light entering the line of sight of a person whose elevation angle is equal to or greater than the cutoff angle, and to emit light that is easy on the eyes.
Since it does not enter the user's field of vision directly, it is possible to prevent the occurrence of glare.

(5) The lighting fixture may include a lens that controls the first partially emitted light to reach the light control member.

With this configuration, light whose light distribution is controlled can be guided to the reflector.

(6) Further, the lens may be a curved Fresnel lens in which the side of a convex lens facing the light source is recessed stepwise.

With this configuration, it is possible to allow light to travel without hindrance in the recessed portion, and to perform efficient light distribution control.

(7) Further, the cross section of the light control member may have a reflecting surface whose surface coincides with a part of a parabola whose focus is the light source.

With this configuration, light can be efficiently reflected upward.

(8) Further, an upper cover portion through which the first partially emitted light is transmitted and a lower cover portion through which the second partially emitted light is transmitted, wherein the transmittance of the upper cover portion is equal to the transmittance of the lower cover portion. It may be higher than the rate.

With this configuration, the emitted light that is emitted from the light source and reflected upward by the light control member can efficiently illuminate the ceiling surface above, and the feeling of brightness can be improved. In addition, since the light passing through the upper cover portion does not go directly downward, the user does not feel uncomfortable glare despite the high light transmittance, that is, the occurrence of glare is prevented. be able to.

(9) A light source unit according to an embodiment of the present invention is a light source unit used in a lighting fixture, comprising a light source and a light control member disposed inside the outer surface of the light source unit and inclined with respect to the horizontal. The light control member controls the first partial emitted light, which is part of the emitted light from the light source, to travel upward with respect to the horizontal direction.

With this configuration, it is possible to provide a light source unit that can illuminate the upper part more brightly than before.

(10) The light source unit further includes a reflecting plate arranged in a vertical direction, and the reflecting plate reflects downward a second partially emitted light that is part of the emitted light from the light source. good too.

With this configuration, it is possible to provide a light source unit that can illuminate downward and brightly illuminate upward with light whose light distribution is controlled more than before.

Reference Signs List 10, 10a lighting fixture 15 power cable 30 fixture body 31 housing 31a bottom plate portion 31aa bottom surface 31b, 31c long side plate portions 31d, 31e short side plate portions 35a, 58a cable 35b, 58b connector 37b base 50 light source unit 51 support 53 Light source unit 53a Light source substrate 53b Light source 55 Power supply unit 57a, 57b Mounting spring unit 59 Cover unit 61 Convex lens 63 Fresnel lens 65 Curved Fresnel lens 65a, 65b Partially curved Fresnel lens 67 Space 590, 590a Cylindrical portion 591, 592 Engaging portion 591a, 592a reflector (first reflector)
591b, 592b Receiving portion 593, 594 Upper cover portion 595 Lower cover portion 595a Bottom plate portion 595b, 595c Side plate lower portion 595d, 595e Side plate middle portion 595f, 595g, 741, 742 Swash plate portion 595h, 743 Upper plate portion 597 Lens portion 597a, 597b Partial curved Fresnel lens portion 597c Lens pedestal portion 597d Protruding portion 598, 599 End plate portion 601, 602, 721, 722 Reflector (second reflector)
701 Transmission part BE1, BE2 Bottom end CO Recess L11, L15, L21, L31, L35, L37, L41 Partially emitted light LE1, LE2, LE11, LE12 Long side end OA Optical axis OV Elliptic curve PA1, PA2 Parabola SV Dashed arrow

Claims (5)

a lighting fixture,
a light source;
Equipped with a reflector arranged in the vertical direction,
the cross section of the reflecting plate has a surface that coincides with a part of an ellipse with the light source as one of the focal points, and reflects downward a second partially emitted light that is part of the emitted light from the light source ;
An upper cover section through which a first partially emitted light that is part of the emitted light from the light source is transmitted, and a lower cover section through which the second partially emitted light is transmitted, wherein the upper cover section and the lower cover section are provided. constitutes the side surface of the lighting fixture, and the transmittance of the upper cover part is higher than the transmittance of the lower cover part
lighting equipment. The luminaire according to claim 1 , wherein the upper cover portion is colorless and transparent . The first partially emitted light is emitted from the light source and passes through a curved Fresnel lens having a shape in which the thickness of each decomposed lens is reduced without reducing the overall thickness when the surface of the convex lens is finely decomposed. and reaching the upper cover portion . a lighting fixture,
a light source;
Reflectors arranged in the vertical direction,
a light control member arranged inside the lighting fixture and inclined downward toward the outside of the lighting fixture;
the light control member controls a first partially emitted light, which is part of the emitted light from the light source, to travel upward;
the reflector downwardly reflects a second partially emitted light that is part of the emitted light from the light source;
the cross-section of the reflector, the surface of which corresponds to a part of an ellipse with the light source as one of the focal points;
An upper cover portion through which the first partially emitted light from the light source is transmitted and a lower cover portion through which the second partially emitted light is transmitted, wherein the upper cover portion and the lower cover portion are connected to the lighting fixture. The transmittance of the upper cover part is higher than the transmittance of the lower cover part.
lighting equipment. A light source unit used in a lighting fixture,
a light source;
Equipped with a reflector arranged in the vertical direction,
the cross section of the reflecting plate has a surface that coincides with a part of an ellipse with the light source as one of the focal points, and reflects downward a second partially emitted light that is part of the emitted light from the light source ;
An upper cover section through which a first partially emitted light that is part of the emitted light from the light source is transmitted, and a lower cover section through which the second partially emitted light is transmitted, wherein the upper cover section and the lower cover section are provided. constitutes the side surface of the lighting fixture, and the transmittance of the upper cover part is higher than the transmittance of the lower cover part
light source unit.

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