JPH0512907A - Lighting fixture - Google Patents

Abstract

PURPOSE:To reflect the light from a lamp in a wide angle range, provide a high illumination efficiency, refrain from boring and large opening in the ceiling, and narrow the range of the light from the lamp being incident into the eye directly. CONSTITUTION:A lighting fixture to illuminate the under-part comprises No.1 reflex mirror 12, which surrounds a lap 10, reflects the light from the lamp, and form a focus 14 under the lamp, and No.2 reflex mirror 16 which is installed under the No.1 mirror and illuminates the under-part by reflecting the light from the focus. The bottom diameter of the No.2 mirror 16 shall be smaller than the max. diameter of the No.1 mirror 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device such as a downlight mounted on a ceiling for illuminating the lower part.

[0002]

2. Description of the Related Art A luminaire for illuminating the lower part of a downlight or the like usually has a cup-shaped reflecting mirror surrounding a lamp,
The light from the lamp is reflected downward by this reflecting mirror and the light from the lamp is effectively used. When illuminating a wide range using this luminaire, it is desirable that the reflecting surface of the reflecting mirror reflects the light from the lamp at a wide angle. In order to meet such demands, the actual development of Sho 62-1
23012 (Jpn. Pat. Appln. Application No. 61-111121) is a lighting fixture including an upper reflector that houses a lamp, a lower reflector that is connected to a lower end of the upper reflector, and a translucent panel that partitions the connection. The upper reflection plate has a reflection surface that reflects the light emitted from the lamp to a portion other than directly below, and the lower reflection plate has a lower portion with the upper end of the lower reflection plate as a focal point and an angle of inclination of the axis of the light reflection angle or more It is characterized in that it is made of a reference paraboloid and is a specular reflector which is gradually inclined inward with respect to the reference paraboloid as it goes upward, and the translucent panel is semitransparent.

[0003]

However, in the case of the above-mentioned prior art, since the translucent translucent panel is used, there is a problem that the illumination efficiency is lowered. In addition, high-intensity discharge lamps (High Intensit
y Discharge Lamp (hereinafter referred to as HID lamp) has a problem that the bottom end dimension of the reflecting mirror becomes large when the lighting fixture is embedded in the ceiling, and a very large opening can be formed in the ceiling. In this case, the light of the lamp is easy to get into your eyes,
It was dazzling to the eyes and it was difficult to create a calm atmosphere.

Therefore, an object of the present invention is to provide a highly efficient luminaire capable of reflecting light from a lamp at a wide angle. Furthermore, it is an object of the present invention to provide a luminaire that does not have a large opening in the ceiling. A further object of the present invention is to provide a luminaire in which the light of the lamp is directly in the eye.

[0005]

In order to achieve such an object, according to the present invention, there is provided a luminaire for illuminating the lower side, which surrounds the lamp and reflects light from the lamp so as to focus on the lower side of the lamp. The first reflecting mirror is connected to the first reflecting mirror, and the second reflecting mirror is provided below the first reflecting mirror to illuminate the lower part by reflecting the light from the focus. The lower end diameter of the second reflecting mirror is the first reflecting mirror. A luminaire is provided that is smaller than the maximum diameter of one reflector.

Further, it is preferable that a third reflecting mirror, which is provided between the first reflecting mirror and the second reflecting mirror, reflects the light from the lamp and returns it to the lamp. Further, it is preferable that a transparent plate is provided below the first reflecting mirror. Further, it is preferable that the reflecting surface of the first reflecting mirror is a spheroidal surface. Furthermore, it is preferable that the reflecting surface of the third reflecting mirror is a spherical surface.

[0007]

According to the structure of the present invention, most of the light emitted from the lamp is reflected by the first reflecting mirror and focused on the lower part of the lamp, and then is reflected by the second reflecting mirror to be broadened. It spreads over an angle and illuminates a wide range. The lighting fixture according to the present invention does not use a translucent panel that absorbs light, and thus has high lighting efficiency. Further, since the lower end diameter of the second reflecting mirror is smaller than the maximum diameter of the first reflecting mirror, a large opening cannot be formed in the ceiling.
Furthermore, since the diameter of the lower end of the second reflecting mirror is small, the range in which the light of the lamp directly enters the eye is narrow, and therefore, it is possible to provide calm illumination without causing glare to the human eye.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side sectional view of a lighting fixture according to the present invention. In this figure, 10 is a well-known lamp, preferably an HID lamp, and is provided so that a first reflecting mirror 12 surrounds the lamp 10 and reflects the light from the lamp 10 to form a focal point 14 below the lamp. Has been. The reflecting surface of the first reflecting mirror 12 is preferably a spheroidal surface whose focal points are the light emitting portion of the lamp 10 and the focal point 14.

A second reflecting mirror 16 is provided below the first reflecting mirror 12 so as to reflect the light from the focal point 14 and illuminate the lower side. The reflecting surface of the second reflecting mirror 16 is preferably a rotating surface that reflects light at a wide angle. The second reflecting mirror 16 has a circular notch portion above so that the light reflected by the first reflecting mirror 12 enters. The second
The size of the reflecting mirror 16 is such that the lower end diameter of the reflecting mirror 16 is such that the opening of the ceiling where the lighting fixture is mounted is sufficiently small.
It is smaller than the maximum diameter of 2.

Further, a third reflecting mirror 18 is provided between the first reflecting mirror 12 and the second reflecting mirror 16 so as to reflect the light from the lamp 10 and return it to the lamp. This third
The reflecting surface of the reflecting mirror 18 is preferably a spherical surface centered on the light emitting portion of the lamp. Further, a transparent plate 20 is horizontally held between the third reflecting mirror 18 and the second reflecting mirror 16 so that, even if the lamp is damaged, fragments are not dropped downward.

The first reflecting mirror 12 and the second reflecting mirror 16
Is preferably one having high reflection efficiency and a reflecting surface which does not cause glare to the eyes. In use, according to the configuration of the present invention described above, most of the light exiting the lamp 1, 2 is reflected by the first reflector 12 to focus at the bottom 14 of the lamp and then at the second reflector 16. It is reflected and spreads over a wide angle to illuminate a wide range. Also, the light 3 reflected by the third reflecting mirror 18 without entering the first reflecting mirror 12 once returns to the light emitting portion of the lamp,
Most of it is again reflected by the first reflecting mirror 12 to focus below the lamp and then reflected by the second reflecting mirror 16 to a wide angle and illuminate the lower part. On the other hand, some light 4
The lamp directly illuminates the lower side through the cutout portion of the second reflecting mirror 16.

With the above structure, most of the light emitted from the lamp illuminates the lower part efficiently, and a semitransparent panel that absorbs the light is not used, so that the illumination efficiency is increased. Furthermore,
Since the lower end diameter of the second reflecting mirror is smaller than the maximum diameter of the first reflecting mirror, a large opening cannot be formed in the ceiling. Also, since the lower end diameter of the second reflecting mirror is small, the range in which the light of the lamp directly enters the eye is narrow, and therefore, it is possible to provide calm illumination without causing glare to the human eye.

[0013]

Since the present invention is constructed as described above,
The light from the lamp can be reflected at a wide angle, the lighting efficiency is high, a large opening cannot be formed in the ceiling, and the range where the light of the lamp directly comes into the eye is narrow.

[Brief description of drawings]

FIG. 1 is a side sectional view of a lighting fixture according to the present invention.

[Explanation of symbols]

10 lamps 12 First reflector 14 focus 16 Second reflector 18 Third reflector 20 transparent plate

Claims (5)

[Claims] 1. A luminaire for illuminating the lower side, which is provided below the first reflecting mirror, which encloses the lamp, reflects the light from the lamp and focuses on the lower side of the lamp. A second reflecting mirror that reflects light from the focus and illuminates the lower part, wherein the lower end diameter of the second reflecting mirror is smaller than the maximum diameter of the first reflecting mirror. 2. A third reflector provided between the first reflecting mirror and the second reflecting mirror, for reflecting light from the lamp and returning the light to the lamp.
The lighting fixture according to claim 1, further comprising: 3. The lighting apparatus according to claim 1, further comprising a transparent plate below the first reflecting mirror. 4. The luminaire according to claim 1, wherein the reflecting surface of the first reflecting mirror is a spheroidal surface. 5. The reflecting surface of the third reflecting mirror is a spherical surface,
The luminaire according to claim 2, wherein