JP7125046B2 - lighting equipment - Google Patents

Description

The present invention relates to lighting fixtures.

The lighting fixture described in Patent Document 1 is a wall washer downlight and is installed on the ceiling. A lighting fixture described in Patent Document 1 includes a planar light source, a reflector (reflection plate), and a diffusion plate. The reflector is bowl-shaped. The reflector is arranged so as to cover the area below the planar light source.

JP 2016-51530 A

However, in the lighting fixture described in Patent Document 1, the reflector is provided over the entire circumference. Therefore, in the lighting fixture described in Patent Document 1, there is a possibility that the light may be reflected even in a direction in which it is not desired to irradiate. For example, light can also be reflected in the opposite direction to the wall.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a lighting fixture capable of suppressing reflection of light in a direction that is not desired to be irradiated.

A luminaire disclosed in the present invention comprises a light source, a cylinder and a diffusion part. The light source emits light. The tubular portion has a tubular shape. The diffusing portion is inclined toward the light source with respect to the optical axis of the light source. The diffusion part diffuses light. The tubular portion has a side portion, a light shielding portion, and an emitting portion. Light emitted from the light source passes through the side portion. The light blocking portion blocks light. The emitting portion emits the light emitted from the light source. A light passing area is included in the side portion. A low reflective surface and a high reflective surface are formed in the light passing area. The high reflection surface has a higher reflectance than the low reflection surface. At least part of the highly reflective surface is located in a region of the light passing region corresponding to the light blocking portion. At least part of the low-reflection surface is located in a region corresponding to the emitting portion in the light passing region, and positioned closer to the emitting portion than the diffusion portion .

Preferably, the lighting fixture disclosed in the present invention further comprises a reflecting member that reflects light. The side portion preferably has an inner peripheral surface. It is preferable that the reflecting member is attached to the inner peripheral surface. It is preferable that the reflecting member has a discontinuous shape in a region corresponding to the emitting portion.

In the lighting fixture disclosed in the present invention, it is preferable that the emitting part emits light in a first direction. It is preferable that the reflecting member has the highly reflective surface. It is preferable that the reflecting member is attached so that the normal direction of the highly reflective surface does not face the second direction. Preferably, the second direction is opposite to the first direction.

In the lighting fixture disclosed in the present invention, it is preferable that the reflecting member has a polygonal shape when viewed from above in a direction parallel to the optical axis.

In the lighting fixture disclosed in the present invention, it is preferable that the reflecting member has an arc shape when viewed from above in a direction parallel to the optical axis.

In the lighting fixture disclosed in the present invention, it is preferable that the reflecting member has a plate shape.

According to the lighting fixture of the present invention, it is possible to suppress reflection of light in a direction that is not desired to be irradiated.

1 is a perspective view of a lighting fixture according to an embodiment of the invention; FIG. 1 is a cross-sectional view of a lighting fixture according to an embodiment of the present invention; FIG. It is the disassembled perspective view which looked at the lighting fixture from the diagonally downward direction. (a) is a perspective view of a reflecting member. (b) is a schematic plan view of the reflecting member and the tubular portion. 4 is a schematic plan view of a reflecting member and a cylindrical portion; FIG. 4 is a schematic plan view of a reflecting member and a cylindrical portion; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated. Also, in this specification, the X-axis and Y-axis of the three-dimensional orthogonal coordinate system are parallel to the horizontal line, and the Z-axis is parallel to the vertical line. The positive direction of the Z-axis is the direction opposite to the direction of gravity and indicates the upward direction, and the negative direction of the Z-axis is the direction of gravity and indicates the downward direction.

A lighting fixture 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view of a lighting fixture 100 according to an embodiment of the invention. FIG. 2 is a cross-sectional view of a lighting fixture 100 according to an embodiment of the invention.

As shown in FIG. 1 , lighting fixture 100 includes light source 110 , cylindrical portion 120 , diffusion portion 130 , light source holding portion 140 , frame portion 150 , mounting portion 170 , and power connection portion 180 . Moreover, as shown in FIG. 2 , the lighting fixture 100 further includes a reflecting member 160 . 2, the mounting portion 170 and the power connection portion 180 are omitted for simplification of the drawing.

Lighting fixture 100 is, for example, a wall washer light. The luminaire 100 is attached to the indoor ceiling, for example. The object to be illuminated by the luminaire 100 is, for example, an indoor wall. Moreover, the lighting area of the lighting fixture 100 is, for example, the wall surface of the wall.

Light source 110 emits light. Here, the light source 110 emits light downward. The optical axis LA of the light source 110 is parallel to the Z direction. For example, light source 110 is an incandescent bulb. Alternatively, light source 110 may be a light emitting diode (LED).

The tubular portion 120 has a tubular shape. The tubular portion 120 is, for example, cylindrical. The tube portion 120 has a side portion 121 , a light blocking portion 122 , an emission portion 123 and a collar portion 124 . The cylindrical portion 120 is made of metal, for example.

Light emitted from the light source 110 passes through the side portion 121 . Side 121 has an inner peripheral surface 125 . The inner peripheral surface 125 preferably has a color that easily absorbs light. For example, the inner peripheral surface 125 may be made of a black material. Further, for example, the inner peripheral surface 125 may be painted black. The light blocking portion 122 blocks light. The light emitted from the light source 110 is emitted from the emitting portion 123 . The collar portion 124 surrounds the periphery of the lower end of the side portion 121 . For example, collar 124 connects to side 121 and extends radially outward.

The diffuser 130 diffuses light. Diffusion part 130 is, for example, a diffusion plate. Diffusion portion 130 is plate-shaped. As shown in FIG. 2 , diffusion section 130 is inclined toward light source 110 with respect to optical axis LA of light source 110 . Also, the diffusion part 130 is located at a position corresponding to the emission part 123 . Therefore, the light incident on the diffusion part 130 is emitted in the first direction D1. The first direction D1 is the direction toward the wall. Therefore, the luminaire 100 can illuminate the wall.

The light source holder 140 holds the light source 110 . The light source holding portion 140 has a socket 140s and an arm portion 140a. The light source 110 is attached to the socket 140 s of the light source holder 140 . The arm portion 140a is formed from an elongated plate-like member. The arm portion 140a is positioned on the side of the light source 110 in the X direction and above the light source 110 in the Z direction. Arm portion 140a is formed by bending a plate-like member.

The frame portion 150 has a body portion 152 and a collar portion 154 . A through hole is provided in the main body portion 152 . The body portion 152 has a substantially tubular shape with a through hole. For example, the body portion 152 has a substantially cylindrical shape. The collar portion 154 surrounds the lower end of the body portion 152 . For example, a collar portion 154 connects to the body portion 152 and extends radially outward. The body portion 152 and the collar portion 154 are integrally provided. The frame portion 150 is positioned outside the tubular portion 120 .

Reflecting member 160 reflects the light emitted from light source 110 . The reflecting member 160 is made of metal, for example. The reflecting member 160 is plate-shaped, for example. Reflective member 160 has a highly reflective surface S1. The highly reflective surface S1 preferably has a color that easily reflects light. For example, the highly reflective surface S1 may be made of a white material. Further, for example, the highly reflective surface S1 may be painted white. A reflective member 160 is attached to the inner peripheral surface 125 . Reflecting member 160 has a discontinuous shape in region R<b>3 corresponding to emitting portion 123 . Therefore, the light reflected by the reflecting member 160 enters the diffusing portion 130 . The light incident on the diffusing portion 130 is diffused by the diffusing portion 130 and emitted from the emitting portion 123 . Moreover, since the reflective member 160 has a discontinuous shape, the amount of members used can be reduced. As a result, the manufacturing cost of the reflecting member 160 can be reduced.

The mounting portion 170 allows the luminaire 100 to be embedded in a ceiling mounting hole. Mounting portion 170 includes a mounting spring 170a and a mounting spring 170b. Mounting spring 170 a and mounting spring 170 b are arranged on the outer peripheral surface of frame portion 150 . For example, the mounting springs 170 a and the mounting springs 170 b are arranged substantially evenly on the outer peripheral surface of the frame portion 150 .

The power connector 180 can be connected to a power line. Power connection 180 includes an arm 182 and a connection terminal 184 . Arm 182 is attached to the outer peripheral surface of frame 150 . For example, the arm 182 is arranged at a position 90° away from the mounting spring 170a and the mounting spring 170b on the outer peripheral surface of the frame 150 with respect to the optical axis LA. A connection terminal 184 is attached to the end of the arm 182 .

The luminaire 100 includes a light passing region R1 in the side portion 121. As shown in FIG. A light passing region R1 indicates a region through which light emitted from the light source 110 passes. A low reflection surface S2 and a high reflection surface S1 are formed in the light passing region R1. The high reflection surface S1 has a higher reflectance than the low reflection surface S2. In this embodiment, the highly reflective surface S1 indicates the highly reflective surface S1 of the reflective member 160 . A low reflective surface S2 indicates a surface of the inner peripheral surface 125 of the side portion 121 on which the reflecting member 160 is not positioned.

At least part of the highly reflective surface S1 is located in a region R2 corresponding to the light blocking portion 122 in the light passing region R1. Therefore, the light incident on the region R2 can be efficiently reflected. As a result, light can be efficiently emitted in the first direction D1.

On the other hand, at least part of the low reflective surface S2 is located in the region R3 corresponding to the output portion 123 in the light passing region R1. Therefore, it is possible to suppress reflection of light incident on the region R3. As a result, it is possible to suppress reflection of light in the second direction D2.

With reference to FIG. 2, traveling paths of a plurality of lights emitted from the center of the lower end of light source 110 will be described. Light L1 is an example of light that is reflected by the highly reflective surface S1 and emitted from the emitting portion 123 in the first direction D1. Since the light L1 is reflected by the highly reflective surface S1, most of the components of the light L1 are emitted from the emission portion 123 in the first direction D1. Therefore, light can be efficiently emitted in the first direction D1.

Light L2 is an example of light that is reflected by the high reflection surface S1 and travels in the first direction D1 and reaches the low reflection surface S2. Light L2A is an example of light emitted from the emission portion 123 in the second direction D2 after the light L2 is reflected by the low reflection surface S2. Since the light L2A is reflected by the low-reflection surface S2, only a low proportion of the components of the light L2 is reflected. Therefore, the light L2A has a lower luminous flux than the light L1. As a result, it is possible to suppress reflection of light in the second direction D2.

A light L3 represents an example of light reflected by the highly reflective surface S1 and traveling in the first direction D1 and reaching the light blocking portion 122 . The light reaching the light shielding portion 122 is blocked by the light shielding portion 122 .

A light L4 is an example of light that reaches the low reflection surface S2 from the light source 110 . Light L4A indicates an example of light that is reflected by the low reflection surface S2 and reaches the light blocking portion 122 in the second direction D2. The light reaching the light shielding portion 122 is blocked by the light shielding portion 122 .

Next, a lighting fixture 100 according to an embodiment of the present invention will be further described with reference to FIGS. 1 to 3. FIG. FIG. 3 is an exploded perspective view of the luminaire 100 viewed obliquely from below.

As shown in FIG. 3, the tubular portion 120 further has two through holes 127 . The arm portion 140 a further has two through holes 142 and two fixing members 144 . The fixing member 144 includes a bolt 144a and a nut 144b. Moreover, the reflecting member 160 further has two through holes 162 . The tubular portion 120 , the arm portion 140 a and the reflecting member 160 are fixed by the fixing member 144 . Specifically, the cylindrical portion 120, the arm portion 140a, and the reflecting member 160 are fixed by passing the bolt 144a through the through hole 142, the through hole 162, and the through hole 127 and fastening with a nut 144b.

The tubular portion 120 further has three engagement holes 128 . Frame 150 also has three mounting springs 156 . The frame portion 150 is attached to the tubular portion 120 by engaging the attachment spring 156 with the engagement hole 128 .

The reflecting member 160 will be further described with reference to FIGS. 4 and 5. FIG. 4A is a perspective view of the reflecting member 160. FIG. FIG. 4B is a schematic plan view of the reflecting member 160 and the cylindrical portion 120. FIG. In FIG. 4B, the normal direction D3 indicates the normal direction of the high reflection surface S1. In FIG. 4B, other members are omitted in order to show the relationship between the reflecting member 160 and the tubular portion 120. As shown in FIG. FIG. 5 is a schematic plan view of the reflecting member 160 and the cylindrical portion 120. FIG. 5, other members are omitted in order to show the relationship between the reflecting member 160 and the cylindrical portion 120. As shown in FIG.

As shown in FIGS. 4(a) and 4(b), the reflecting member 160 includes a plurality of highly reflective surfaces S1. The multiple high reflection surfaces S1 include a first high reflection surface S1a, a second high reflection surface S1b, a third high reflection surface S1c, a fourth high reflection surface S1d, and a fifth high reflection surface S1e. The first highly reflective surface S1a and the fifth highly reflective surface S1e are trapezoidal. The second high reflection surface S1b, the third high reflection surface S1c, and the fourth high reflection surface S1d are rectangular.

The lower end of the first highly reflective surface S1a and the lower end of the fifth highly reflective surface S1e are inclined with respect to the X-axis direction. When the reflecting member 160 is attached to the cylindrical portion 120 , the bottom end of the first high reflection surface S1a and the bottom end of the fifth high reflection surface S1e are in contact with the diffusion portion 130 . Therefore, the tilt angle of the diffusing portion 130 is defined by the lower end of the first highly reflective surface S1a and the lower end of the fifth highly reflective surface S1e.

As shown in FIG. 4(b), the reflecting member 160 has a polygonal shape in plan view in a direction parallel to the optical axis LA. Therefore, the reflecting member 160 can be easily manufactured by, for example, bending sheet metal.

Also, the reflecting member 160 is attached to the cylindrical portion 120 so that the normal direction D3 of the high reflection surface S1 does not face the second direction D2. Therefore, it is possible to suppress reflection of light in the second direction D2 by the highly reflective surface S1. As a result, it is possible to suppress the light from being reflected in a direction that is not desired to be irradiated.

As shown in FIG. 5, at least part of the highly reflective surface S1 is located in a region R2 corresponding to the light blocking portion 122 in the light passing region R1. In this embodiment, among the plurality of high reflection surfaces S1, the second high reflection surface S1b, the third high reflection surface S1c, and the fourth high reflection surface S1d are in the region R2. Therefore, the light incident on the region R2 can be efficiently reflected. As a result, light can be efficiently emitted in the first direction D1.

On the other hand, at least a part of the low reflective surface S2 is located in the region R2 corresponding to the output portion 123 in the light passing region R1. Therefore, it is possible to suppress reflection of light incident on the region R3. As a result, it is possible to suppress reflection of light in the second direction D2.

As described above with reference to FIGS. 4 and 5, the reflecting member 160 has the highly reflective surface S1. The reflecting member 160 is mounted so that the normal direction D3 of the highly reflective surface S1 does not face the second direction D2 opposite to the first direction D1. Therefore, it is possible to suppress reflection of light in the second direction D2 by the highly reflective surface S1. As a result, it is possible to suppress the light from being reflected in a direction that is not desired to be irradiated. For example, when the lighting fixture 100 is installed at a position close to the wall surface on the ceiling surface, by reducing the reflected light toward the living room space side (that is, the direction in which it is not desired to illuminate), people in the living room space feel dazzled. can prevent

In the lighting device 100 described with reference to FIGS. 1 to 5, the reflecting member 160 has a polygonal shape in plan view when viewed in a direction parallel to the optical axis LA. The reflective member 160 may be arcuate in plan view.

The reflecting member 160 will be described with reference to FIG. FIG. 6 is a schematic plan view of the reflecting member 160 and the cylindrical portion 120. FIG. In FIG. 6, other members are omitted in order to show the relationship between the reflecting member 160 and the tubular portion 120. As shown in FIG.

As shown in FIG. 6, the reflecting member 160 has an arcuate shape in plan view in a direction parallel to the optical axis LA. In this embodiment, the reflecting member 160 has a semicircular shape in plan view when viewed in a direction parallel to the optical axis LA. Therefore, the light can be efficiently distributed in the first direction D1.

The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 6). However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the scope of the invention (for example, (1) to (4) shown below). In order to facilitate understanding, the drawings schematically show each component mainly, and the thickness, length, number, etc. of each component illustrated are different from the actual ones due to the convenience of drawing. . In addition, the material, shape, dimensions, etc. of each component shown in the above embodiment are examples and are not particularly limited, and various changes are possible within a range that does not substantially deviate from the effects of the present invention. be.

(1) The luminaire 100 described with reference to FIGS. 1 to 6 includes the reflecting member 160, but the present invention is not limited to this. The luminaire 100 does not have to include the reflecting member 160 . For example, the inner peripheral surface 125 of the cylindrical portion 120 may have a high reflective surface S1 and a low reflective surface S2. For example, the inner peripheral surface 125 located in the region R2 corresponding to the light shielding portion 122 in the light passing region R1 may be painted white to increase the reflectance. On the other hand, the inner peripheral surface 125 located in the region R3 corresponding to the output portion 123 in the light passing region R1 may be painted black to lower the reflectance.

(2) In the luminaire 100 described with reference to FIGS. 1 to 6, the highly reflective surface S1 of the reflective member 160 is continuous, but the present invention is not limited to this. For example, the highly reflective surface S1 of the reflective member 160 may be separate.

(3) In the lighting fixture 100 described with reference to FIGS. 1 to 6, the reflecting member 160 is attached to the cylindrical portion 120 so that the normal direction D3 of the highly reflective surface S1 does not face the second direction D2. However, the present invention is not limited to this. For example, the reflecting member 160 may be attached to the cylindrical portion 120 so that a part of the normal direction D3 of the high reflection surface S1 faces the second direction D2.

(4) In the luminaire 100 described with reference to FIGS. 1 to 6, the highly reflective surface S1 is located in the region R2 corresponding to the light shielding portion 122 and the region R3 corresponding to the emitting portion 123 in the light passing region R1. However, the present invention is not limited to this. For example, the highly reflective surface S1 may be present only in the region R2 corresponding to the light shielding portion 122 in the light passing region R1, and may not be present in the region R3 corresponding to the emitting portion 123. FIG.

100 Lighting fixture 110 Light source 120 Cylindrical portion 121 Side portion 122 Light shielding portion 123 Emitting portion 125 Inner peripheral surface 130 Diffusion portion D1 First direction D2 Second direction D3 Normal direction LA Optical axis R1 Light passing region R2 Region R3 Region S1 High reflection Surface S2 Low reflection surface

Claims (6)

a light source that emits light;
a cylindrical barrel;
a diffusing portion that is inclined toward the light source with respect to the optical axis of the light source and diffuses light;
The cylindrical portion is
a side portion through which light emitted from the light source passes;
a light shielding part for shielding light;
and an emitting portion for emitting light emitted from the light source,
including a light-passing region within the side portion;
A low-reflection surface and a high-reflection surface having a higher reflectance than the low-reflection surface are formed in the light-passing region,
at least part of the high reflection surface is located in a region corresponding to the light shielding portion in the light passing region;
At least a portion of the low-reflection surface is located in a region of the light passing region corresponding to the emitting portion, and is positioned closer to the emitting portion than the diffusing portion . It further comprises a reflective member that reflects light,
the side portion has an inner peripheral surface;
The reflecting member is attached to the inner peripheral surface,
The lighting fixture according to claim 1, wherein the reflecting member has a discontinuous shape in a region corresponding to the emitting part. the emitting portion emits light in a first direction;
The reflective member has the highly reflective surface,
3. The lighting fixture according to claim 2, wherein said reflecting member is attached so that the normal direction of said highly reflective surface does not face a second direction opposite to said first direction. 4. The lighting fixture according to claim 2, wherein said reflecting member has a polygonal shape in plan view in a direction parallel to said optical axis. 4. The lighting fixture according to claim 2, wherein said reflecting member has an arc shape in plan view in a direction parallel to said optical axis. The lighting fixture according to any one of claims 2 to 5, wherein the reflecting member is plate-shaped.

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