JPS61225704A - Lighting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lighting fixture, which enhances the lighting effect by, for example, highlighting a wall recessed in the ceiling or exhibits, or emphasizing the depth of a room. Regarding equipment.

[Conventional technology]

Conventionally, this type of lighting equipment refracts the light from the lamp 1 in a predetermined direction toward the irradiated wall surface in order to effectively illuminate the irradiated wall surface. For example, as shown in FIG. A translucent cover 2 is provided over the illumination opening on the lower surface of the instrument body, and the lower surface of this cover 2 has a structure formed with a fine prism surface 3 consisting of an uneven surface having an approximately V-shaped cross section. It is being

[Problem that the invention seeks to solve]

In the light-transmitting cover 2 formed on the fine prism surface 3 consisting of the uneven surface, when a person facing the irradiated wall looks up from the direction of angle θ■, the virtual image of the 11 parts of the lamp 1 is 1
2 and the surface 4 on the irradiated wall side perpendicular to the straight tube lamp 1.
shines white, the surface 5 on the opposite side appears dark, and the 104 on the irradiated wall side reflects the image of the lamp 1 and shines. In other words, the degree of diffusion of the lamp image by the fine prism surface 3 of this cover 2 is about 50%, and the high-intensity lamp enters the eyes of the person facing the irradiated wall surface, so that the irradiated surface of the irradiated wall surface is has the problem that it becomes unattractive due to the brightness of the lamp 1.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a lighting fixture that can effectively illuminate a wall surface to be illuminated by increasing the degree of diffusion of the lamp image using a cover.

[Means for solving problems]

The lighting fixture of the present invention has a light-transmitting cover provided on the irradiation opening, and the straight tube lamp is disposed at a position opposite to the irradiated wall surface from the center of the fixture body, and the irradiated wall surface is directly below the irradiated wall surface. The prism surface of the cover on the opposite side is a prism surface whose surface in a direction perpendicular to the length direction of the lamp is curved into a continuous concave curve.

(Function) In the lighting fixture of the present invention, when looking upward from directly below the straight tube lamp of the cover and facing the irradiated wall surface using the fine prism surface on the opposite side of the irradiated wall surface, the projected area of the lamp image is It is small and the image of the lamp is well diffused.

[Embodiment] Next, the configuration of an embodiment of the present invention will be described with reference to FIG. 1 of the drawings.

Reference numeral 10 denotes a device main body that is embedded and fixed in a ceiling surface 11. This device main body 10 is formed in an elongated circular shape extending in a direction parallel to the irradiated wall surface, and has an irradiation opening 12 formed in its lower surface. A reflector plate 13 is attached to the inside of the instrument body 10, and a pair of sockets 14 are attached to the lower surface of the reflector plate 13, deviating from the center of the instrument body 10 to the side opposite to the irradiated wall surface. This pair of sockets 14 has a high tit
A straight tube type lamp 15, such as a lamp, is arranged parallel to the wall or surface to be irradiated, and is directed toward the wall surface.

Further, a translucent cover 16 is attached to the irradiation opening 12 of the instrument body 10 so as to close it.

This cover 16 has a planar inner surface and an outer surface of the lamp 1.
5 is parallel to the length direction of the lamp 15 and the irradiated wall side is in a predetermined direction so as to refract the light rays emitted from the lamp 15 in a predetermined direction of the irradiated wall surface. It is a fine prism surface 18 having concavities and convexities in which a plane surface 17 inclined at an angle is continuously formed.

Further, the opposite side of the cover 16 from the vicinity directly below the lamp 15 to the irradiated surface is a prism surface in which the surface perpendicular to the length direction of the lamp 15 is continuously curved into a concave curved surface 19, as shown in FIG. 20.

Note that the prism surface 18.20 of the cover 16 is connected to the lamp 1.
Although the prism surface is formed by a surface of protrusions parallel to the length direction of FIG. 5, it can also be formed into a pyramidal prism surface with fine irregularities as shown in FIG.

Next, the operation of this embodiment will be explained.

When the lamp 15 is turned on, as shown in FIG. 1, the lamp 15 is deviated from the center of the fixture body 10 to the side opposite to the irradiated wall surface, so that the light ray A emitted from the lamp 15 is directed toward the irradiated wall surface. The light ray A emitted from the lamp 15 by the prism surface 18 on the side of the wall to be irradiated is refracted in a predetermined direction toward the wall to be irradiated, resulting in the light distribution shown in FIG. The prism surface 20 on the opposite side of the wall illuminates the irradiated wall surface 2 as shown in FIG.
When a person facing the exhibit 22 of No. 1 looks upward at an angle θ■ due to the critical refraction and total reflection of the curved concave curved surface 19 on the irradiated wall side of the prism surface 20, as shown in FIG. The virtual image of the 11 parts of the lamp 15 appears as 12 parts, and the projected area of the 12 parts from the direction of the angle θ■ becomes smaller, and the image of the lamp 15 is diffused.

〔Effect of the invention〕

According to the present invention, the side opposite to the irradiated wall surface from the vicinity immediately below the straight tube lamp, which is disposed offset to the opposite side from the irradiated wall surface from the center of the device body in which the irradiation opening is provided with a light-transmitting cover. The prism surface of the cover is curved into a continuous concave surface in the direction perpendicular to the length direction of the lamp.
The degree of diffusion of the lamp is doubled, and the wall surface to be illuminated can be effectively illuminated.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of a lighting fixture showing one embodiment of the present invention, FIG. 2 is an enlarged perspective view of a portion of the same cover, and FIG. 3 is a perspective view of a portion of the cover showing another embodiment. , FIG. 4 is an explanatory diagram of the prism surface of the cover of the present invention, FIG. 5 is an explanatory diagram of the present invention, FIG. 6 is a light distribution diagram of the lighting fixture of the present invention, and FIG. 7 is a diagram of the cover of a conventional lighting fixture. FIG. 3 is an explanatory diagram of a prism surface. 10. Instrument body, 12. Irradiation opening, 15. Straight tube lamp, 16. Translucent cover, 19. Concave curved surface, 20.
- Prism surface, 21...Irradiated wall surface. March 29, 1985

Claims (1)

[Claims] (1) A light-transmitting cover is provided on the irradiation opening, and the lamp is placed on the side opposite to the irradiated wall from the immediate vicinity of the straight tube lamp, which is placed offset from the center of the device body to the side opposite to the irradiated wall. A lighting device characterized in that the prism surface of the cover is a prism surface that is curved into a continuous concave surface in a direction perpendicular to the length direction of the lamp.