JPH03289003A - Luminaire - Google Patents

Abstract

PURPOSE:To prevent light beams of a lamp from being incident to eyes directly by forming the face of a reflection plate along the lamp in the form of convex shape toward an opening from the inside of a luminaire, and forming a reflection face for controlling a light beam shutting angle with the inclined angle of a tangential line from the lamp with respect to the curved surface. CONSTITUTION:An iluminaire device is provided with reflection plates 13 having an opening 1 and lamp units held between the plates 13, wherein the face of the plate 13 along the lamp unit is formed in a convex shape toward the opening 11 from the inside to form a reflection face to control the light beam shutting angle by the inclined angle of the tangential line from the lamp with respect to the curved face. It is thus possible to change the inclined angle to prevent the beams from the lamp units from being incident to eyes directly, and to prevent decrease in illumination directly applied downwards with an increased illumination opening of the main body of iluminaire and with less decrease in the light amount.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a lighting device, and relates to a lighting device in which a light shielding angle is regulated by a reflector.

(Prior Art) As shown in FIG. 8, a conventional ceiling-mounted lighting fixture of this type has a narrow area a and a large depth and height h of the irradiation opening 2 of the fixture body 1, so that the lamp 3 and the edge of the irradiation aperture 2 of the instrument body 1, and the irradiation aperture surface forms a light shielding angle θ.

Conventionally, as shown in FIGS. 9 and 10,
The instrument body 1 has a depth and height h by means of a looper 4 provided in the irradiation opening 2 of the instrument body 1. For example, in the structure shown in FIG. 8, the height of the looper 4 provides a shading angle θ1, and in the structure shown in FIG. 9, the height h2 of the looper 4 provides a shading angle θ2; <h
2, the shading angle becomes θ1<θ2, and the shading angle of the device shown in FIG. 10 is larger than that of the device shown in FIG.

(Problems to be Solved by the Invention) In the above-mentioned conventional lighting equipment, since the opening area of the irradiation aperture 2 of the equipment main body 1 is narrowed, there is a large loss in the amount of light.
There is also a problem in that the looper causes a loss of light quantity.

The present invention has been made to solve the above problems,
To provide a lighting fixture that has little loss of light quantity and can have a large shading angle without narrowing the area of an irradiation aperture.

[Structure of the invention]

(Means for Solving the Problems) A lighting fixture of the present invention includes a reflecting plate having an irradiation opening and a lamp included in the reflecting plate, and the reflecting plate irradiates a surface along the lamp from the inside. The reflecting surface is formed as a convex arc-shaped surface toward the opening and regulates the light shielding angle by the inclination angle of the tangent to the curved surface connecting to the lamp.

(Function) In the lighting fixture of the present invention, the surface of the reflector plate along the lamp is made into a convex arc-shaped surface from the inside toward the irradiation opening, and the shading angle is obtained by the inclination angle of the tangent to the curved surface connected to the lamp. Since the light shielding angle is obtained by the reflective surface, the angle of inclination of the tangent line between the lamp and the curved surface changes depending on the viewing position, and it is very unlikely that the lamp will directly enter your eyes. In addition, the irradiation aperture of the instrument body expands, and the illuminance directly below is hardly attenuated, resulting in less loss of light quantity and high illuminance. In addition, a wide gradation is formed on the curved reflective surface, and even with high-intensity light, soft image illumination similar to indirect illumination can be obtained.

(Embodiment) Next, the configuration of an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 10 denotes a device main body, which is formed in the shape of an elongated rectangular box with an irradiation opening 11 formed on the lower surface, and lamp sockets 12 for mounting straight tube fluorescent lamps are provided at both ends of the device main body 10, respectively.

Further, reference numeral 13 denotes a reflector plate containing a lamp, which is disposed on both sides along the lamp mounted in the lamp socket 12 from the inner side of the upper surface of the appliance main body 10 to between the edges of the irradiation opening 11. The surface of this reflecting plate 13 that runs along the lamp is a convex arcuate surface extending from the inside toward the irradiation aperture 11, and is formed into a reflecting surface 14 that regulates the light shielding angle by the inclination angle of the tangent to the curved surface connected to the lamp. It is formed. Further, a frame edge 16 is formed on the edge of the reflection plate 13 on the irradiation opening 12 side so as to cover the edge 15 formed by bending the edge of the irradiation opening 11 of the instrument body outward. The frame edge 16 is fixed to the edge 15 by spot welding or the like.

Next, the operation of this embodiment will be explained.

The instrument body 10 is inserted into a hole 18 in a ceiling surface 17 or the like, and the instrument body 10 is fixed with a hanging tool (not shown) or the like with the upper body with the tip of the edge frame 16 in contact with the lower surface of the ceiling surface 17.

In this state, as shown in FIG. 3, when the lamp 19 is turned on, a light blocking angle is obtained by the inclination angle of the tangent between the curved surface of the convex arc-shaped surface of the surface of the reflector 13 along the lamp 19 and the curved surface connecting the lamp 19. The inclination angle of the tangent to the curved surface connecting the lamp 19 changes depending on the viewing position, the lamp 19 hardly ever enters the eye directly, and a large shading angle θa can be obtained compared to the shading angle θb of the conventional device. In addition, the irradiation aperture 11 of the instrument body 10 expands, and the illuminance directly below is hardly attenuated, resulting in less loss of light quantity and high illuminance. Moreover, a wide gradation is formed on the curved reflective surface 14, and even with high illumination light, the illumination has a soft image similar to indirect illumination.

Next, the configuration of another embodiment will be explained with reference to FIGS. 4 and 5.

In the above embodiment, a structure using a box-shaped instrument main body 10 has been described, but in this embodiment, the instrument main body and a reflecting plate are integrated, and the reflecting plate 20 has an elongated rectangular shape with an irradiation opening 21 formed on the lower surface. It is formed into a box shape, and a frame edge 22 is formed at the edge of the irradiation opening 21 of this reflection plate 20 . The surfaces of both side surfaces of the reflector plate 20 along the lamps attached to the lamp sockets 23 provided at both ends of the reflector plate 20 are convex arcuate surfaces extending from the inside toward the irradiation opening 21 as described above. It is formed on a reflective surface 24 that regulates the light shielding angle by the inclination angle of the tangent to the curved surface connecting the lamp.

In the structure of this embodiment as well, as in the structure of the previous embodiment, a light shielding angle is obtained by the inclination angle of the tangent between the curved surface of the convex arc-shaped surface of the surface along the lamp of the reflector plate 20 and the curved surface connecting with the lamp, and the light shielding angle is large. The shading angle can be obtained. Furthermore, the irradiation aperture 21 of the reflector 20 is expanded, resulting in less loss of light quantity and high illuminance. Moreover, a wide gradation is formed on the curved reflective surface 24, and even with high illuminance, the illumination has a soft image similar to indirect illumination.

Furthermore, the configuration of another embodiment will be explained with reference to FIGS. 6 and 7.

The structure of this embodiment is that in the structure shown in FIGS. 4 and 5, a substantially U-shaped mounting frame 25 is attached to the back side of the reflector 20.
This installation is done by attaching the frame 25 to the frame edge 22 of the reflector 20.
Attach to the back of the unit by spot welding, etc. In this structure as well, a large light shielding angle can be obtained by the inclination angle of the tangent between the curved surface of the convex arc-shaped surface of the surface of the reflecting plate 20 along the lamp and the curved surface connecting to the lamp. Further, the irradiation aperture 21 of the reflection plate 20 expands, and high illuminance can be obtained. In addition, the curved reflective surface 24 provides soft illumination similar to indirect illumination.

In addition, in each of the above embodiments, an elongated rectangular reflector using a straight tube fluorescent lamp was described, but it can also be applied to a cylindrical reflector using an annular lamp. The reflection surface may be formed into a convex arc-shaped surface toward the lamp, and the light-shielding angle is regulated by the inclination angle of the tangent to the curved surface connected to the lamp.

Furthermore, the reflector has an appropriate shape, such as a triangular or square shape, depending on the shape of the lamp and the number of lamps, and the surface along the lamp is a convex arc-shaped surface from the inside toward the irradiation aperture, and the curved surface connected to the lamp. It may be formed on a reflective surface that regulates the light shielding angle by the inclination angle of the tangent.

〔Effect of the invention〕

According to the present invention, the reflector is formed so that the surface along the lamp is a convex arc-shaped surface from the inside toward the irradiation opening, and the light-blocking angle is regulated by the inclination angle of the tangent to the curved surface connected to the lamp. The shading angle is obtained by the inclination of the tangent between the curved surface of the reflecting plate and the curved surface of the 5-arc-shaped reflective surface of the reflector, and since the shading angle is obtained by the reflective surface of the curved surface, the inclination of the tangent to the curved surface connecting to the lamp depends on the viewing position. By changing the angle, a large shading angle can be obtained without increasing the depth of the device body or installing a louver, the lamp rarely enters the eyes directly, and the irradiation aperture is widened, so the direct illuminance is almost negligible. There is no attenuation, so there is little loss of light quantity, and high illuminance can be obtained. moreover,
A wide gradation is formed on the curved reflective surface,
Even with high-intensity light, a soft image similar to indirect lighting can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a lighting fixture showing one embodiment of the present invention, Fig. 2 is a vertical sectional view of the same, Fig. 3 is an explanatory view of the same, and Fig. 4 is a lighting fixture showing another embodiment of the invention. FIG. 5 is a longitudinal sectional view of the same, FIG. 6 is a perspective view of a lighting fixture showing still another embodiment of the present invention, FIG. 7 is a longitudinal sectional view of the same, and FIGS. 8 to 10 are a longitudinal sectional view of the same. They are explanatory diagrams of conventional lighting fixtures. 13, 20...Reflector, 11.21...Irradiation aperture, 14
゜24... Reflective surface, 19... Lamp.

Claims (1)

[Claims] (1) A reflector having an irradiation aperture and a lamp included in the reflector, the reflector having a surface along the lamp as a convex arc-shaped surface from the inside toward the irradiation aperture, and a curved surface connected to the lamp. A lighting fixture characterized in that it is formed on a reflective surface that regulates a shading angle by an inclination angle of a tangent to the surface.