JPH05347105A - Lighting fixture for wall irradiation with light shield - Google Patents

Abstract

(57) [Summary] [Purpose] The necessary minimum shading can be performed to improve the efficiency of the equipment and reduce the temperature rise of the lamp and equipment. [Structure] A main reflector 1, a light source 2 disposed in an upper part of the main reflector 1 with an inclined optical axis Z, and an auxiliary reflector 3 provided on the illumination direction side are combined to combine them into a wall lighting fixture 4. Make up. A light shielding plate 5 is provided which shields only the range where the direct light from the light source 2 is incident on the auxiliary reflecting plate 3 in the vicinity of the light source 2. The light-shielding plate 5 provides the minimum necessary light-shielding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main reflecting plate having a shape in which the long axis of a rotating body rotated about the long axis of an ellipse is inclined and the lower part of the rotating body is cut and opened, and the inside of the main reflecting plate. A light source that is placed on the upper part of the optical axis to match the major axis of the ellipse of the rotating body that constitutes the main reflector, and an auxiliary reflector (cone) that is provided on the illumination direction side and has a specific glare cut angle. The present invention relates to a wall-illuminating luminaire with a light-shielding plate for illuminating a wall surface in a wide range in combination.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 (a) and 5 (b), the long axis of a rotary body rotated about the long axis of an ellipse is tilted and the lower portion of the rotary body is cut and opened. A main reflector 1 having a shape, a light source 2 disposed on an upper part of the main reflector 1 and having an optical axis aligned with the major axis of an ellipse of a rotating body forming the main reflector 1, and provided on the illumination side. There is known a wall surface illuminating device 4 for illuminating a wall surface in a wide range by combining an auxiliary reflection plate 3 having a specific glare cut angle.
The auxiliary reflection plate 3 is a mirror surface in order to properly set the glare cut angle and for design reasons. However, when the light source 2 has high brightness, the illuminance unevenness occurs on the irradiation surface due to the reflected light of the auxiliary reflection plate 3 or the direct light. For this reason,
In the prior art, as shown in FIG. 4B, the cylindrical light-shielding member 5 ′ is used to cut the direct light, or
As shown in (b), the disc-shaped light shielding member 5'cuts off the direct light.

[0003]

However, in the above-mentioned conventional example, while the uniformity of the irradiation surface is improved, part of the light other than the light directly applied to the auxiliary reflector 3 is also blocked. However, the efficiency of the fixtures decreased, and the temperature of the lamps and fixtures increased. The present invention was invented in view of the problems of the above-mentioned conventional example, and the purpose thereof is to:
(EN) It is possible to provide a wall-illuminating lighting device with a light-blocking plate, which can perform the minimum necessary light shielding, improve the efficiency of the equipment, and reduce the temperature rise of the lamp and the equipment.

[0004]

According to the lighting device for illuminating a wall surface with a light shielding plate of the present invention, the long axis of the rotating body rotated about the long axis of the ellipse is inclined and the lower portion of the rotating body is cut and opened. A main reflector 1 having a shape, a light source 2 arranged in an upper part of the main reflector 1 and having an optical axis Z aligned with the major axis of an ellipse of a rotating body constituting the main reflector 1, and in the illumination direction side. A wall-illuminating luminaire 4 which is provided and is configured by combining auxiliary reflection plates 3 having a specific glare cut angle, in the vicinity of the light source 2 only a range in which direct light from the light sources 2 is incident on the auxiliary reflection plates 3. The present invention is characterized in that it is provided with a light-shielding plate 5 that shields light. By adopting such a configuration, the problems of the conventional example described above are solved and the object of the present invention is achieved. ..

[0005]

According to the present invention having the above-described structure, however, by providing the light shielding plate 5 which shields only the range where the direct light from the light source 2 is incident on the auxiliary reflection plate 3 in the vicinity of the light source 2. It is possible to perform the minimum necessary light shielding, improve the efficiency of the equipment, and reduce the temperature rise of the lamp and the equipment.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the accompanying drawings. FIG. 1 shows a lighting device 4 for wall surface irradiation according to the present invention.
Is shown and is attached to the ceiling 6 or the like.
In the figure, reference numeral 1 denotes a main reflector, which has a shape in which the long axis of a rotating body rotated about the long axis of the ellipse is inclined and the lower portion of the rotating body is cut and opened in a substantially inverted V shape. A lamp, which is the light source 2, is arranged in the upper portion of the main reflection plate 1 having such a shape, and the optical axis Z of the light source 2 is the major axis of the ellipse of the rotating body forming the main reflection plate 1 described above. Is matched with
It is inclined. In the embodiment, the optical axis Z of the light source 2 arranged in the main reflector 1 is inclined by about 40 ° so that the most efficient illuminance can be obtained so as to illuminate the visual point on the wall surface.

A frame 7 is arranged below the main reflector 1 and is provided below the main reflector 1 on the light illuminating direction side and has an auxiliary glare cut angle (cone). Three
Is attached to the frame 7. The shape of the auxiliary reflection plate 3 is a shape obtained by obliquely cutting a parabolic rotating body. By the way, the primary focus (F ₁ ) of the main reflection plate 1 in which the long axis of the rotating body rotated about the long axis of the ellipse described above is inclined and the lower portion of the rotating body is cut and opened in a substantially inverted V shape. The light source 2 is disposed at the position, and the secondary focus (F ₂ ) is located immediately below the frame 7. Therefore, the light from the light source 2 is reflected by the main reflection plate 1 and then passes through the secondary focus (F ₂ ) to spread from the ceiling of the wall surface to the floor surface or left and right.

Here, the direct light of the light source 2 emitted from the light source side of the opening of the frame 7 (on the right side of the instrument center line M in FIG. 1) is diffused and radiated to a position far away from the instrument.
Since the reflected light of the main reflection plate 1 is irradiated over a wide range, uneven illuminance (shadow of the frame 7) is unlikely to occur. Therefore, if the direct light incident on the auxiliary reflection plate 3 is cut off, the reflected light of the auxiliary reflection plate 3 is not reflected on the illumination surface, and the direct light is emitted from the light source 2 instead of the opening of the auxiliary reflection plate 3. By cutting in the vicinity of, the shadow of the light shielding plate 5 does not occur, and an irradiation surface with good uniformity can be obtained. For this reason,
In the present invention, the direct light from the light source 2 is emitted by the auxiliary reflector 3
A light-shielding plate 5 is provided so as to shield only the area incident on the light source 2 in the vicinity of the light source 2. Further, specifically, the auxiliary reflection plate 3 has a shape obtained by obliquely cutting a parabolic rotating body, and the range of the intersection of the plane XY perpendicular to the optical axis Z and the incident light to the auxiliary reflection plate 3 is As shown in FIG. 3, it becomes a crescent moon of the lower chord, and the positional relationship between the light shielding plate 5 and the light source 2 when viewed from below in the same direction as the optical axis is as shown in FIG. Further, such a crescent-shaped light-shielding plate 5 can have a simpler and cheaper structure than the conventional cylindrical light-shielding member.

By the way, the shading plate 5 is mounted on the upper part of the main reflecting plate 1 by a mounting member 10 as shown in FIG. 1. In the embodiment, the shading plate 5 is rotatably mounted on the mounting member 10. The light source 2 is mounted so that the light shielding plate 6 can be rotated to replace the lamp when the lamp, which is the light source 2, is replaced.

[0010]

As described above, according to the present invention, since the light shielding plate for shielding only the range where the direct light from the light source enters the auxiliary reflecting plate is provided in the vicinity of the light source, the direct light is supplemented by the auxiliary reflecting plate. Since it only cuts the light that is directly incident on the plate, it does not unnecessarily cut the direct light, resulting in high illuminance and high efficiency. The radiant heat is small, the temperature of the sealing portion can be reduced, the surface temperature of the bulb can be reduced, and since there is no light shielding plate directly below the light source, the effect of cooling the lamp by convection is great.

[Brief description of drawings]

1 is a cross-sectional view of the present invention.

FIG. 2 is an explanatory view showing a positional relationship between the light shielding plate and the light source of the same.

FIG. 3 is an explanatory diagram showing a positional relationship between the light source, the light shielding plate, and the auxiliary reflection plate of the above.

FIG. 4 shows a conventional example, (a) is a horizontal sectional view,
(B) is a perspective view of a light shielding member used in the above.

FIG. 5 shows another conventional example, (a) is a side sectional view,
(B) is a perspective view of a light shielding member used in the above.

[Explanation of symbols]

 1 Main Reflector 2 Light Source 3 Auxiliary Reflector 4 Wall Lighting Illuminator 5 Light Block Z Optical Axis

Claims (1)

[Claims] 1. A main reflector having a shape in which the long axis of a rotating body rotated about the long axis of an ellipse is tilted and a lower portion of the rotating body is cut and opened, and the main reflecting plate is disposed above the main reflecting plate. A lighting device for wall irradiation, which is configured by combining a light source whose optical axis coincides with the long axis of an ellipse of a rotating body forming a main reflector and an auxiliary reflector provided on the illumination direction side and having a specific glare cut angle. A wall-illuminating luminaire with a light-shielding plate, characterized in that it is provided with a light-shielding plate that shields only a range in which direct light from the light source is incident on the auxiliary reflecting plate in the vicinity of the light source.