JPH04118803A - Lighting appliance - Google Patents

Abstract

PURPOSE:To intensify illuminace while glaring light is being prevented by disposing light conducting plates which lead incident light to the end sections by means of total reflection in the side direction of a lamp, and thereby providing each upper surface of the light conducting plates with diffusing sections which reflect incident light irregularly. CONSTITUTION:A light pass opening in the lower surface of a lighting appliance main body 1 is covered with a light controlling body 2 such as louvers and the like, light conducting plates 3 are concurrently disposed in the side direction of the appliance main body 1. Each light conducting plate is made of transparent acrylic resin, and its upper surface is provided with white stripe shaped diffusing sections 31 roughly parallel with a lamp, which are formed by means of silk screen printing in such a way that mutual intervals become narrower and their widths become wider as they are parted from the appliance main body 1. Light which is directly directed downward from the light pass opening of the appliance main body 1, out of light emitted from a single base fluorescent lamp 5, does not glare because of the light controlling body 2. Incident light to each light conducting plate 3 is led to each side end of the light conducting plates 3 while total reflection is repeated, and incident light to the diffusing sections 31 all the while is irregularly reflected, so that the most of the light comes downward from the light conducting plates 3 to irradiate spaces downward, and a part of the light concurrently goes upward to irradiate a ceiling surface. Since the diffusing sections are formed into a stripe shape, uniform brightness can thereby be provided over the whole surfaces of the light conducting plates 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lighting fixture, and particularly to a lighting fixture used for general indoor lighting.

[Conventional technology]

In general, lighting fixtures used for general indoor lighting are made with high-output lamps or with multiple lights in order to ensure sufficient illuminance in the room with just one lighting fixture. The upper part of the lamp is covered with a reflector plate so that the light emitted from the lamp can be used effectively, and the light is irradiated widely into the room where the lighting equipment is used.

[Problem to be solved by the invention]

However, as mentioned above, if you try to increase the illuminance of a room with a single lighting fixture by using a high-output lamp, the luminance of the lighting fixture will increase, making it feel dazzling to the eyes. Therefore, in order to avoid this glare, many lighting equipment cover the indoor side of the lamp and reflector of the lighting equipment with a translucent cover or louver made of a milky white diffusion panel, etc., and as a result, the illuminance decreases. I couldn't get it very high.

The present invention has been made in view of the above background, and an object of the present invention is to provide a lighting fixture that can increase illuminance while preventing glare.

[Means to solve the problem]

The lighting equipment according to the present invention includes a lamp in the lighting equipment main body, and a light guide plate that guides incident light from one end face close to the lamp to an end spaced apart from the one end face by total reflection. Placed on the side and arranged in the lighting equipment body,
A diffusion section is provided on the upper surface of the light guide plate to diffusely reflect incident light.

The lighting fixture may be equipped with a plurality of single-cap fluorescent lamps, the caps of the single-cap fluorescent lamps being arranged close to each other, and the light guide plate provided over the entire outer periphery of the lighting fixture.

Furthermore, this lighting fixture may be equipped with a plurality of single-cap fluorescent lamps radially arranged.

Moreover, in this lighting fixture, the diffusion portions may be formed in a stripe shape that is substantially parallel to the lamp, and the distance between the diffusion portions is narrower toward the outside and wider toward the outside.

Further, in this lighting fixture, the diffusion portion can be formed by silk printing.

Furthermore, in this lighting fixture, an end surface diffusion portion that diffuses incident light can be provided on the outer peripheral edge of the lighting fixture of the light guide plate.

[Function] According to the present invention, the light emitted from the lamp is emitted from a wide area by the light guide plate, so that the luminance of the lighting fixture is relatively low.

Further, according to the present invention, by providing the end face diffusion portion for diffusing incident light on the outer peripheral edge of the light guide plate of the lighting device, the end face of the light guide plate can be made to appear bright even when viewed from below indoors.

〔Example〕

1 to 4 show a first embodiment of the present invention, which will be described below based on the drawings.

This embodiment is a lighting fixture used as the main lighting in a room, and as shown in FIG.
The transparent opening on the lower surface of the lighting fixture is covered with a light control body 2 such as a louver, and a substantially rectangular light guide Fi, 3 made of transparent acrylic resin is provided on the side of the lighting fixture main body l.

As shown in FIGS. 2 and 3, the lighting fixture main body 1 has a socket base 12 and a lamp support near both longitudinal ends of a main body plate 11 that is approximately gutter-shaped and has a longitudinally rising portion 11a at the side edge. A stand 13 is provided, a socket 4 and a lamp support spring 6 are attached thereto, and a lighting device 7 is disposed thereon, and a substantially box-shaped light guide plate mounting frame 15 with an open top is attached to the bottom surface of the main body plate 11. .

The main body plate 11 has a circular power wire insertion hole 11b in which an electric AM wire such as VVF is inserted, in the approximate center thereof, and a mounting hole 11c for attaching a lamp to the socket base 12 at both longitudinal ends thereof. There is a mounting hole lid on the support base 13.
are drilled in each case and can be attached to the ceiling using wood screws, etc. The socket base 12 has a pair of socket mounting screw holes 12a drilled from the outside thereof, and a socket 4 for mounting a single-cap fluorescent lamp 5, which is a line-shaped lamp, is mounted with a screw, while a socket from the center thereof A mounting screw hole (not shown) for mounting the light guide plate mounting frame 14 is provided.

The lamp support base 13 is formed of an elastic thin plate and has a lamp support spring 6 attached to the outside thereof, which holds the vicinity of the tip of the single-cap fluorescent lamp 5, and a light guide plate similar to the socket base 12 is attached to the center of the lamp support base 13. A mounting hole 13a for mounting the mounting frame 14 is provided.

The light guide plate mounting frame 14 has a substantially box-like shape with an open top, and the center part of the lower surface is a recessed part recessed upward in the longitudinal direction. This is a light guide plate attachment part 14a to which the light guide plate is attached.

Three light guide plate attachment holes 14b into which the light guide plate attachment screws 15 are inserted are formed in each of the light guide plate attachment parts 14a.

Near both longitudinal ends of the central portion of the light guide plate mounting frame 14, one of the bottom surfaces of the recess is provided with a socket insertion hole 1 into which the socket 4 is inserted.
4c is provided with a lamp support spring insertion hole 14d through which the lamp support spring 6 is inserted, and a pair of light control body mounting portions 14e are provided protruding from the periphery of the opening of the recess toward the center for light control. A body mounting screw hole 14 is provided.

Further, a mounting screw hole provided in the socket base 12 and a mounting screw hole provided in the lamp support base 13 are provided slightly closer to the center than the socket insertion hole 14c and the lamp support spring insertion hole 14d on the bottom surface of the concave portion in the center of the light guide plate mounting frame I4. A light guide plate attachment frame attachment hole 14g is provided corresponding to the attached attachment hole 13a.

The light control body 2 has a light control device 22 such as a louver or panel on the light control body mounting frame 21! ! The light control body mounting screws 23 inserted into the screw insertion holes 21a drilled near both longitudinal ends of the light control body mounting frame 21 are screwed into the light control body mounting screw holes 14f of the light guide plate mounting frame 14. It is attached to the lighting fixture main body 1 and covers the lower surface of the single-cap fluorescent lamp 5.

As shown in FIG. 4, the light guide plate 3 is made of transparent acrylic resin and is formed into a substantially rectangular shape.The light guide plate 3 has a shape on its upper surface that is narrower as the distance from the lighting equipment main body l increases, and as the distance from the lighting equipment main body l increases. It has a diffusion part 31 formed by silk printing in a white stripe shape that is approximately parallel to the lamp that widens, and in the vicinity of the single-cap fluorescent lamp 5 that is the lamp, the upper surface and the lower surface are parallel surfaces 32 that are parallel to each other. Inclined surfaces 33 and 34 are formed that become thinner as the distance from 5 increases.

Of the light emitted from the single-cap fluorescent lamp 5, the light that goes directly downward from the light-transmitting opening of the lighting fixture body 1 is glare-cut or diffused by the light control body 3, so that it does not cause any glare. There is. At this time, since the lamp is a line-shaped single-cap fluorescent lamp 5 and the light-transmitting opening of the lighting fixture body 10 is also sized to match the lamp, light control is easy.

On the other hand, the light that enters the light guide plate 3, mainly to the side, undergoes repeated total reflection within the light guide plate 3 and is guided to the side edge of the light guide plate 30. The light causes diffuse reflection in the diffuser 31, and most of the light comes out from the light guide plate 3 below, illuminating the lower part, and some also comes out on the upper surface, brightening the ceiling surface. Since the diffusion portion 31 is formed in the striped shape as described above, substantially uniform brightness can be obtained over the entire surface of the light guide plate 3.

In this lighting fixture, the light emitted from the single-cap fluorescent lamp 5 is emitted from a wide area by the light guide plate 3, so that the luminance of the lighting fixture can be kept relatively low, and high illuminance can be obtained while preventing glare. This allows the light to hit the ceiling surface without making it feel heavy.

FIG. 5 shows a second embodiment of the invention. In this lighting fixture, the lighting device 7 also serves as a socket stand, and the light guide Fi
3 has a substantially rectangular truncated pyramid shape and has a substantially rectangular opening 35 in the center through which a single-cap fluorescent lamp 5 is inserted, and this opening is covered with a light control body 2 made of two panels. Even when looking up from directly below, since the light control body 2 is a panel, the lamp will not be directly visible, and glare can be reliably prevented.

6 to 10 show a third embodiment of the present invention. This embodiment has two single-cap fluorescent lamps 5 arranged with their caps close to each other, and is a lighting fixture used as the main indoor lighting, and is basically the same as the first embodiment. Since it is for two lights, it differs in the following points.

The lighting fixture main body 1 has a socket base 1 approximately in the center of the main body plate 11.
2, lamp support stands 13 are provided near both longitudinal ends, a socket 4 is attached to the socket stand 12, and a lamp support spring 6 is attached to the lamp support stand 13, respectively. Main body plate 11
A circular power wire insertion hole 11b into which a power wire such as a VVF is inserted is provided below the socket base 12 at approximately the center thereof, and a daruma hole for mounting is provided in the lamp support base 13 at both longitudinal ends. A mounting screw hole 11c and a mounting screw hole 11d are respectively drilled, so that it can be mounted to the ceiling surface with wood screws or the like. The socket base 12 has two pairs of socket mounting holes 12a formed in a substantially symmetrical manner from the center thereof, and has two sockets 4, each of which is fitted with a single-cap fluorescent lamp 5, which is a line-shaped lamp. are attached with screws. The light guide plate 3 is made of transparent acrylic resin and is formed into an oval shape with a substantially rectangular opening 35 in the center.

In this lighting fixture, the single-cap fluorescent lamps 5 are arranged in a straight line, and the light emitted from the single-cap fluorescent lamps 5 is emitted from a wide area by the light guide plate 3, so that the luminance of the lighting fixture can be kept relatively low, thereby reducing glare. It is possible to obtain high illuminance while preventing
The light does not hit the ceiling surface and make it feel heavy, and the light from both single-cap fluorescent lamps 5 overlaps each other and does not cover the socket area too much.

A fourth embodiment of the present invention shown in FIGS. 11 and 12 is as follows:
Four single-cap fluorescent lamps 5 are arranged radially with their caps close to each other, and the entire circumference is surrounded by a light guide plate 3, so that the directionality of the indoor illuminance distribution can be eliminated.

The fifth embodiment of the present invention shown in FIGS. 13 and 14 and the sixth embodiment of the present invention shown in FIG. In contrast to the previous arrangement, multiple lamps are arranged on different planes that intersect with each other. Here, although the above embodiment uses two lights, it may be four lights or the like.

A fifth embodiment of the present invention shown in FIGS. 13 and 14 is as follows:
The light fixture has a narrow-angle bevel with the center section facing upward and the outside facing downward.

On the other hand, in the sixth embodiment of the present invention shown in FIG. 15, the central part of the lighting fixture is downward and the outside is upward, providing wide-angle light distribution.

A seventh embodiment of the present invention shown in FIGS. 16 and 17 is as follows:
The main parts of the configuration are the same as the first embodiment.

In the lighting fixture of the first embodiment, the outer peripheral end face of the light guide IIF 1.3 is approximately parallel to the end face on which the light enters, and the light is emitted in a direction approximately perpendicular to the end face of the light guide plate 3. In this case, a problem can be expected that the end face will appear dark.

Therefore, in this embodiment, the light guide plate 3 is
The upper edge of the end surface 36 on the side remote from the end surface 36 is a chamfered surface 37, and this chamfered surface 37 is printed in green to form an end surface diffusion section 38. The light incident on the chamfered surface 37 is diffusely reflected by the end face diffuser 38, and the light is emitted in various directions upward and downward, making it appear bright.

In the seventh embodiment, the end surface diffusion section 38 is substantially planar, but as shown in FIG. 18, if the end surface diffusion section 38 is provided with large irregularities, a decorative effect can also be achieved.

In the embodiment shown in FIG. 19, a chamfered surface 37 is simply provided, and reflection and transmission on the chamfered surface 37 make the end face diffuser 38 bright.

In the embodiment shown in FIG. 20, a green sticker is pasted on the chamfered surface 37 to form the end surface diffusion section 38. In the embodiment shown in FIG. 21, a green sticker is pasted on the end surface 36 itself to form the end surface diffusion section. 38.

In the embodiment shown in FIG. 22, a prism is provided on the end face 36 to form an end face diffuser 38.

Note that the lamp is not limited to a single-cap fluorescent lamp, but may be a straight tube fluorescent lamp or the like, and the light control body may not be provided. Further, the method of providing the diffusion portion of the light guide plate is not limited to silk printing, and the shape thereof may also be a grid-like shape, a mesh-like shape, etc. with different coarseness.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the following effects.

- In the lighting fixture of claim 1, high illuminance can be obtained while preventing glare.

In the lighting device of the second aspect, high illuminance can be obtained while preventing glare, and the socket portion does not become too dark due to the light from the plurality of single-cap fluorescent lamps interfering with each other.

In the lighting fixture according to claim 3, the light guide plate can be provided on the entire outer periphery of the lighting fixture.

In the lighting fixture according to the fourth aspect, the brightness of the light guide plate can be made uniform.

In the lighting fixture according to claim 5, the diffusion portion of the light guide plate can be easily formed.

In the lighting fixture according to claim 6, the end face of the light guide plate looks bright even when viewed from below in the room.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention, FIG. 1 is a perspective view, FIG. 2 is a front half-sectional view, FIG. 3 is an exploded perspective view, and FIG. 4 is a cross-sectional view of main parts. It is a front view. FIG. 5 is an exploded perspective view showing a second embodiment of the invention. 6 to 10 show a third embodiment of the present invention, in which FIG. 6 is a perspective view, FIG. 7 is a half-sectional front view, and FIGS. 8 and 9 are exploded perspective views. FIG. 10 is a sectional front view of the main part. 11 and 12 show a fourth embodiment of the present invention, with FIG. 11 being a perspective view and FIG. 12 being a half-sectional front view. 13 and 14 show a fifth embodiment of the present invention, with FIG. 13 being a perspective view and FIG. 14 being a side view. FIG. 15 is a side view showing a sixth embodiment of the present invention. 16 and 17 show a seventh embodiment of the present invention, FIG. 16 is a half-sectional front view, and FIG.
The figure is a sectional front view of the main part. FIG. 18 is an exploded perspective view showing an eighth embodiment of the present invention. Figures 19 to 22
The figures are main part sectional front views showing other different embodiments of the present invention. 1-Lighting device main body, 2-light control body, 3-light guide plate, socket, 5-single base fluorescent lamp, 31-diffusion part, 2-parallel surface, 33
-・-1 slope, 34-・slanted surface, 3 end surface, 37—chamfered surface, 38 one end surface diffusion part.

Claims (6)

[Claims] (1) A lamp is equipped in the lighting equipment body, and a light guide plate is placed on the side of the lamp to guide incident light from one end face close to the lamp to an end separated from the one end face by total reflection. 1. A lighting device comprising: a diffusion portion disposed in a lighting device main body to diffusely reflect incident light on an upper surface of a light guide plate. (2) A lighting fixture according to claim 1, characterized in that it is equipped with a plurality of single-cap fluorescent lamps, the caps of the single-cap fluorescent lamps are arranged close to each other, and a light guide plate is provided over the entire outer periphery of the lighting fixture. (3) The lighting fixture according to claim 1 or 2, characterized in that a plurality of single-cap fluorescent lamps are installed radially. (4) The lighting device according to claim 1, 2 or 3, wherein the diffusion portions are formed in a striped shape substantially parallel to the lamp, with the distance from each other becoming narrower toward the outside and wider toward the outside. (5) The lighting device according to claim 1, 2, 3 or 4, wherein the diffusion portion is formed by silk printing. (6) Claims 1, 2, and 3, characterized in that an end surface diffusion portion for diffusing incident light is provided on the outer peripheral edge of the lighting device of the light guide plate.
4. The lighting fixture according to 4 or 5.