JPH0992016A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve apparatus efficiency through a decrease in the loss of light to prevent illuminance on a wall surface or the like from becoming uneven by causing lamp beams to illuminate the wall surface or the like after being reflected by a reflector from a second focal point and then converging to a first focal point. SOLUTION: When this luminaire is placed on a ceiling 7 or the like to make lamp beams a1 to a3 irradiate a wall surface 17 with its major axis 16 pointed to the wall surface 17, the lamp beams illuminate the wall surface 17 after being reflected by a reflector 1 from a second focal point 13 and converging to a first focal point 12. The loss of light can thus be decreased to prevent the illuminance on the wall surface 17 from becoming uneven. Since the first focal point 12 is located near the open side 15 of the reflector 1, the lamp beams a1 , a2 reflected by a reflecting surface near the open side 15 and passing through the focal point 12 can illuminate the wall surface 17 up to the ceiling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for illuminating a wall surface or the like.

[0002]

2. Description of the Related Art Heretofore, there has been a lighting apparatus in which a lamp is arranged at the focal point of a parabolic mirror, and the optical axis is obliquely embedded in the ceiling to illuminate a wall surface.

[0003]

However, this luminaire has a drawback in that the wall surface cannot be widely illuminated and the ceiling of the wall surface cannot be illuminated, and the efficiency of the luminaire is poor. Therefore, an object of the present invention is to provide a luminaire that can widely illuminate a wall surface, can illuminate the ceiling of the wall surface, and has high luminaire efficiency.

[0004]

The luminaire according to claim 1 has a spheroidal concave surface having a first focal point and a second focal point, and the opening surface is near the first focal point. And a lamp provided at the second focal point of the reflecting mirror, which is inclined with respect to the long axis and in which the second focal point is located inward.

According to the luminaire of the first aspect, when the lamp light is placed on the ceiling or the like and the long axis is directed to the wall surface and the lamp light is applied to the wall surface, the lamp light is reflected from the second focal point by the reflecting mirror. Since the wall surface is illuminated after being focused on the first focus, the loss of light can be reduced, the efficiency of the device can be improved, and the light can be uniformly irradiated on the wall surface from the first focus. , The unevenness of illuminance on the wall surface etc. is eliminated. Further, since the first focus is located near the opening surface of the reflecting mirror, the lamp light reflects off the reflecting surface near the opening surface and can illuminate the ceiling of the wall surface with the light passing through the first focus. .

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. That is, this luminaire
It has a reflecting mirror 1 and a lamp 2. The reflector 1 has a spheroidal concave surface 1 having a first focal point 12 and a second focal point 13.
4 and the opening surface 15 has a first focal point 12
Is inclined with respect to the major axis 16 in the vicinity of the
Is located inward. The long axis 16 of the reflecting mirror 1 is the wall surface 1.
7 and is arranged so that the opening surface 15 is horizontal.
It is also considered that the opening surface 15 of the reflecting mirror 1 cuts glare in the direction opposite to the wall surface 17, and the opening surface 15 has an elliptical shape as shown in FIG.

The lamp 2 is arranged at the second focal point 13 of the reflecting mirror 1. The lamp 2 is attached to the lamp socket 18. The reflector 1 and the lamp 2 are mounted on the ceiling 7
It is fixed to the instrument main body 3 embedded in the embedding hole 8.
That is, the instrument body 3 includes the top plate 4, the side plate 5, and the fixture 6.
And the locking portion 9 at the lower end of the side plate 5 is locked to the edge portion of the embedding hole 8, and the fixture 6 is locked to the back surface of the ceiling 7 so that the fixture body 3
Is fixed to the ceiling. A ring-shaped frame 10 is attached to the lower end of the instrument body 3, the reflecting mirror 1 is placed on the frame 10, and the upper end is attached to the top plate 4 of the instrument body 1 by attachment means 20. Further, the lamp socket 18 on which the lamp 2 is mounted is attached to the socket base 21, and the socket base 21 is attached to the fixture body 3.

According to this embodiment, the lamp lights a _{1 to} a ₃ are arranged on the ceiling 7 or the like with the long axis 16 directed toward the wall surface 17.
When illuminating the wall surface 17, the lamp light is emitted from the second focus 13
Since the reflection mirror 1 is reflected on the first focal point 12 to illuminate the wall surface 17, the loss of light can be reduced, the efficiency of the device can be improved, and the first focal point can be made uniform. Since the lights a _{1 to} a ₃ are applied to the wall surface 17, the illuminance unevenness on the wall surface 17 is eliminated. Also the first focus 1
Since 2 is located near the opening surface 15 of the reflecting mirror 1, the lamp light is reflected by the reflecting surface near the opening surface 15 and the light a ₁ and a ₂ passing through the first focus 12 causes the lamp light to come near the ceiling of the wall surface 17. Can be illuminated up to.

[0009]

According to the luminaire of the first aspect, when the lamp light is placed on the ceiling or the like and the long axis is directed to the wall surface to irradiate the wall light with the lamp light, the lamp light reflects from the second focus. Then, the wall surface is illuminated after being focused on the first focus, so that the loss of light can be reduced, the efficiency of the device can be improved, and the light can be uniformly irradiated on the wall surface from the first focus. Therefore, the unevenness of illuminance on the wall surface is eliminated. Also the first
Since the focal point of is located near the opening surface of the reflecting mirror, the lamp light reflects off the reflecting surface near the opening surface, and the light passing through the first focus can illuminate the ceiling of the wall surface. is there.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a perspective view of an opening surface and a frame of a reflecting mirror.

[Explanation of symbols]

 1 Reflector 2 Lamp 12 First Focus 13 Second Focus 14 Concave Surface 15 Opening Surface 16 Long Axis

Claims (1)

[Claims] 1. A spheroidal concave surface having a first focal point and a second focal point, the aperture surface being inclined with respect to a major axis in the vicinity of the first focal point and the second focal point. A luminaire comprising a reflecting mirror having a focal point located inward, and a lamp arranged at the second focal point of the reflecting mirror.