JP3106768U - lighting equipment - Google Patents

Abstract

The present invention provides a lighting fixture that can illuminate a lower floor surface of about 3 to 7 m in a wide range and that can uniformly illuminate the entire surface without causing a decrease in illuminance at the center.
In a lighting fixture 10 having a light source lamp 1 and a reflecting plate 2 having a mirror-like inner surface for reflecting light from the light source lamp 1, the inner surface of the reflecting plate 2 is divided into three upper and lower stages with different inclination angles. It formed from the above inclined part 2a-2c, and the coloring ring 3b and the ring-shaped lower reflecting plate 3c were attached to the downward direction of the reflecting plate 2 so that attachment or detachment was possible.
[Selection] Figure 1

Description

  The present invention relates to a lighting fixture that is installed and installed on a ceiling or the like of a building, and more particularly to a mounting lighting fixture that is suitable for a downlight that illuminates a floor surface below about 3 to 7 m.

  Conventionally, a hemispherical reflector is generally used as a reflector of a lighting fixture having a light source lamp and a reflector that reflects light from the light source lamp.

  However, with a hemispherical reflector, the light from the light source lamps interferes with each other and does not reach far away, so there is no problem when illuminating the lower part of about several tens of centimeters like a desk lamp on a desk. Or, if you try to illuminate the lower floor of about 3-7m like a downlight installed on the ceiling of the office, there is a problem that the illuminance is insufficient. In addition, the hemispherical reflector is improved by providing fine irregularities on the inner surface of the hemispherical reflector to improve the illuminance by irregularly reflecting the light. Then, there is a problem that the illuminance is insufficient.

  On the other hand, it has been considered to improve the reachability of the reflected light by using the inner surface of the reflecting plate as a polyhedron, but the light reflection direction is controlled in a single-stage polyhedron having a single inclination angle. It is not possible to illuminate a wide area uniformly.

Therefore, the applicant of the present application previously proposed a reflector in which the inner surface is formed of two upper and lower inclined portions having different inclination angles in Patent Document 1. With this two-stage reflecting plate, it is possible to illuminate a wide area by adjusting the inclination angle of the upper and lower inclined portions to reflect light.
JP 2003-151310 A

  However, in the two-stage reflector, the reflected light from the inclined parts on both sides proceeds so as to cross each other. Therefore, when trying to illuminate a wide area, a new problem that the illuminance in the central part directly below the downlight is insufficient. Has occurred. Therefore, it is necessary to provide a plurality of light source lamps or to use a light source lamp having a large output in order to secure the necessary central illumination (typically about 200 lx).

  Moreover, although the reflecting plate of the above-mentioned Patent Document 1 has a 16-sided inner surface in order to improve reflection efficiency, there is a problem in that the shadow of the edge of the 16-hedron appears on the lower floor surface to be illuminated.

  Furthermore, since the reflector of Patent Document 1 simply reflects light from the light source lamp downward, there is a problem in that the ceiling surface has insufficient illuminance and lacks decorativeness.

  Then, the subject which this invention tends to solve is providing the lighting fixture which can illuminate the floor surface below about 3-7m over a wide range, and can improve a decorating property.

  Another object is to provide a lighting fixture that can substantially eliminate the shadow of the edge of the reflector.

  Still another object is to provide a luminaire that can reduce the number of light source lamps or reduce the output of the light source lamps in order to obtain necessary illuminance.

  The present invention relates to a lighting fixture having a light source lamp and a reflecting plate having a mirror-like inner surface in order to reflect light from the light source lamp, and the inner surface of the reflecting plate is inclined at three or more stages, each having a different inclination angle. A colored ring or a ring-shaped lower reflector is detachably attached to the lower part of the reflector.

  The inner surface of the reflector is preferably a polyhedron of 18 faces or more in order to improve the reflection efficiency and substantially eliminate the shadow of the edge of the reflector. The following polyhedron is preferable. Although the reflection efficiency is slightly reduced, the inner surface may be spherical (curved surface) depending on conditions such as the installation location.

  In addition, even in the case where a plurality of light source lamps are required in the conventional hemispherical or two-stage reflector in order to obtain the required illuminance, the present invention uses a three-stage reflector as described above. As a result, the number and output of light source lamps can be reduced, and the range in which a single light source lamp can be used is expanded.

  Further, the light source lamp is preferably of a type having a single point-like light emitter such as a metal halide lamp (CDM) in order to facilitate control of the light reflection direction.

  In the lighting fixture of the present invention, the inner surface of the reflector is formed from three or more inclined portions with different inclination angles, so that the reflection direction of the light from the light source lamp is refined by adjusting the inclination angle of each inclination portion. Can be adjusted. Accordingly, it becomes possible to illuminate a wide area while ensuring the illuminance at the center by a single light source lamp, and the number of light source lamps can be reduced or the output can be reduced. Thereby, in many cases, it is possible to use a single light source lamp, greatly reduce the amount of power used, reduce the amount of heat generation, and improve the air conditioning efficiency of the building.

  Further, since the coloring ring is detachably attached to the lower side of the reflecting plate, it can be colored in a desired color of light from the light source lamp and the decorativeness can be improved. Furthermore, in the case where a ring-shaped lower reflector is attached below the reflector, the ceiling surface can be brightened by reflecting light from the light source lamp to the ceiling by the lower reflector, and the decorativeness is improved.

  Further, by making the inner surface of the reflector plate into a polyhedron of 18-hedron to 24-hedron, the reflection efficiency is improved, and the shadow of the edge of the reflector plate that has conventionally appeared on the floor to be illuminated can be substantially eliminated. it can.

  Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings in which the present invention is applied to a downlight.

  FIG. 1 is a cross-sectional view of a first embodiment of a downlight according to the present invention, FIG. 2 shows a reflector used in the downlight of FIG. 1, (a) is a bottom view, and (b) is a front view. It is.

  A downlight 10 shown in FIG. 1 includes a light source lamp 1 made of a metal halide lamp (CDM), a reflection plate 2 for reflecting light from the light source lamp 1, and a main body 3 for fixing the reflection plate 2.

  The light source lamp 1 is mounted on the top plate portion of the reflection plate 2, is mounted on a socket (not shown), and is located in the reflection plate 2.

  As shown in FIG. 2, the reflecting plate 2 is formed of a shaded 18-sided body having a regular octagonal bottom shape (transverse cross-sectional shape), and the inner surfaces thereof are a first inclined portion 2a and a second inclined portion having different inclination angles, respectively. It is formed by three upper and lower inclined portions including 2b and the third inclined portion 2c. The size of the reflecting plate 2 and the inclination angles and lengths of the inclined portions 2a to 2c are appropriately set according to conditions such as the ceiling height and illumination range of the place where the downlight 10 is installed.

  The material of the reflecting plate 2 is aluminum, and the reflecting surface on the inner surface is made into a mirror surface by coating the surface of aluminum with titanium / silicon. The material of the reflecting plate is not limited to aluminum, and the inner surface may be mirror-finished using, for example, a metal plate.

  The main body 3 has a ring-shaped support member 3a projecting outward on the outer periphery of the lower end thereof, and the downlight is placed on the back surface of the ceiling T by placing the support member 3a on the back surface of the ceiling T. The entire 10 is suspended.

  A coloring ring 3b is detachably attached to the inner peripheral side of the support member 3a. The coloring ring 3b is made of a translucent plastic colored in a desired color, and is colored in a desired color of light from the light source lamp 1 to improve the decoration.

  A lower reflector 3c is detachably attached below the coloring ring 3a as necessary. The lower reflecting plate 3c is for reflecting light from the light source lamp toward the ceiling T. By using the lower reflecting plate 3c, the ceiling T can be brightened, and the floor surface is indirect. Can be illuminated with lighting. The lower reflector 3c is formed in a ring shape with a hole in the center for heat dissipation.

  FIG. 3 schematically shows the state of reflection of light from the light source lamp 1 by the reflector 2 (only on the left side). As shown in the figure, the light beam from the light source lamp 1 is reflected by the first to third inclined portions 2 a to 2 c on the inner surface of the reflector 2. Since the first to third inclined portions 2a to 2c have different inclination angles as described above, the light reflection angles are also different, and the inclination angles and lengths of the first to third inclined portions 2a to 2c are different. By appropriately adjusting the thickness, the light reflection direction of the light source lamp 1 can be precisely adjusted, and a wide range can be illuminated while ensuring the illuminance at the center.

  For example, in the downlight 10 using a reflector having an opening width of 380 mm at the lower end, the ceiling height is 7 m as shown in FIG. 4 by adjusting the inclination angle and length of the three upper and lower inclined portions. When dyne lights 10 were installed at an interval of 7 m at the factory in No. 1, the entire floor surface could be illuminated with the required illuminance (about 200 lx). At this time, a decrease in illuminance at the central portion, which was generated in the conventional two-stage reflector, did not occur, and no shadow was observed at the edge of the reflector. In FIG. 4, the light reflection direction indicates only the opposite sides of the two dyne lights 10.

  In this way, by providing three or more inclined portions on the inner surface of the reflector, the degree of freedom in adjusting the light reflection direction is increased, and a single light source lamp can secure a wide area while ensuring the illuminance at the center. Can be illuminated. Accordingly, a single light source lamp can be used to cover the place where three light source lamps are required in the conventional reflector.

  FIG. 5 is a sectional view showing a second embodiment of the downlight according to the present invention. In the figure, the same or corresponding components as those in the first embodiment are designated by the same reference numerals, and the description thereof is omitted.

  In this embodiment, a fluorescent lamp that emits light over the entire length is used as the light source lamp 1. Also in the present embodiment, the necessary range can be illuminated with the required illuminance while ensuring the illuminance at the center by adjusting the inclination angles and lengths of the first to third inclined portions 2a to 2c. Accordingly, a single light source lamp can be used to cover the place where three light source lamps are required in the conventional reflector.

  FIG. 6 is a sectional view showing a third embodiment of the downlight according to the present invention. In the figure, the same or corresponding components as those in the first embodiment are designated by the same reference numerals, and the description thereof is omitted.

  In this embodiment, two light source lamps 1 made of fluorescent lamps are used. Thus, when it is desired to increase the illuminance, a plurality of light source lamps 1 can be used. And also in a present Example, by adjusting the inclination angle and length of 1st-3rd inclination part 2a-2c, a required range can be illuminated, ensuring the illumination intensity of a center part, and the conventional hemisphere Since the illuminance can be made higher than when a reflector having a shape or a two-stage structure is used, the amount of power used can be reduced. Specifically, with the conventional reflector, the place where 4 to 5 light source lamps are required can be covered with two light source lamps.

  The present invention can be used not only as a downlight attached to a ceiling but also as a lighting fixture attached to a wall surface and a floor surface.

1 shows a sectional view of a first embodiment of a downlight according to the present invention. The reflector used for the downlight of FIG. 1 is shown, (a) is a bottom view, (b) is a front view. The reflection state (only the left side) of the light from the light source lamp by a reflecting plate is typically shown. The example of installation of the downlight which concerns on this invention is shown. A second embodiment of a downlight according to the present invention is shown in cross section. A third embodiment of a downlight according to the present invention is shown in cross section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source lamp 2 Reflector 2a 1st inclination part 2b 2nd inclination part 2c 3rd inclination part 3 Main-body part 3a Supporting member 3b Coloring ring 3c Lower reflector

Claims (6)

A lighting fixture having a light source lamp and a reflecting plate having a mirror-like inner surface for reflecting light from the light source lamp,
The inner surface of the reflecting plate is formed from three or more inclined portions with different inclination angles,
A lighting fixture in which a colored ring is detachably attached below the reflector. A lighting fixture having a light source lamp and a reflecting plate having a mirror-like inner surface for reflecting light from the light source lamp,
The inner surface of the reflecting plate is formed from three or more inclined portions with different inclination angles,
A luminaire in which a ring-shaped lower reflector is detachably attached below the reflector.   The lighting fixture according to claim 1 or 2, wherein an inner surface of the reflecting plate is a polyhedron having 18 to 24 planes.   The lighting fixture according to claim 1 or 2, wherein an inner surface of the reflecting plate is spherical.   The luminaire according to any one of claims 1 to 4, wherein a single light source lamp is used.   The lighting apparatus according to claim 1, wherein the light source lamp has a single point-like light emitter.

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