JP3033980B2 - Indoor lighting fixtures - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device, and more particularly to a lighting device used for general indoor lighting.

[Conventional technology]

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

[Problems to be solved by the invention]

However, as described above, if the lamp is made to have a high output in order to increase the illuminance in the room with one lighting device, the brightness of the lighting device becomes high, so that it becomes dazzling. Therefore, in order to avoid this glare in many lighting fixtures, the indoor side of the lamps and the reflectors of the lighting fixtures is covered with a translucent cover or a louver made of a milky white diffusion panel or the like. Couldn't be too high.

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

[Means for solving the problem]

The lighting fixture according to the present invention is provided with a lamp in a lighting fixture body, and a light guide plate that guides incident light from one end face close to and facing the lamp to an end part separated from the one end face by total reflection. The light guide plate is provided on the upper side of the light guide plate in such a manner that the diffuser portion diffuses incident light on the upper surface of the light guide plate.

The lighting fixture may be equipped with a plurality of single-base fluorescent lamps, and the bases of the single-base fluorescent lamp may be arranged close to each other, and the light guide plate may be provided on the entire outer periphery of the lighting fixture.

Further, the lighting fixture may be provided with a plurality of single-base fluorescent lamps in a radial manner.

In addition, in this lighting apparatus, the diffusion portion may be formed in a stripe shape that is substantially parallel to the lamp, the distance between which is smaller toward the outside and the width is wider toward the outside.

Further, in this lighting apparatus, a light control body that covers the lower part of the lamp can be provided.

Further, in this lighting fixture, an end surface diffusion portion for diffusing incident light can be provided at the outer peripheral edge of the lighting fixture of the light guide plate.

[Action]

According to the present invention, the light emitted from the lamp is made wider from the area by the light guide plate to make the luminance of the lighting fixture relatively low.

Further, according to the present invention, the end surface of the light guide plate is provided with an end surface diffusion portion for diffusing the incident light at the outer peripheral edge portion of the lighting device so that the end surface of the light guide plate looks bright even when viewed from below the room.

〔Example〕

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

This embodiment is a lighting fixture used as a main lighting in a room. As shown in FIGS. 1 to 3, the lower part of a single base fluorescent lamp 5 attached to a lighting fixture main body 1 having a substantially square box shape. A substantially rectangular light guide plate 3 made of a transparent acrylic resin is arranged in such a manner that it is covered with a light control body 2 such as a louver and the like so that the one-base fluorescent lamp 5 is located close to one end surface and substantially along the ceiling surface. And is arranged on the lighting fixture body 1. The light guide plate 3 guides incident light from one end face which is close to and opposed to the one-base fluorescent lamp 5 to the end part separated from the one end face by total reflection.

As shown in FIG. 2 and FIG.
A socket base 12 and a lamp support base 13 are provided near both longitudinal ends of a main body plate 11 having a substantially gutter-like shape and having a rising portion 11a at a side edge in a longitudinal direction, and a socket 4 and a lamp support spring 6 are attached to the main body plate 11 and a lighting device. 7 is provided, and a substantially box-shaped light guide plate mounting frame 14 having an open upper surface is attached to the lower surface of the main body plate 11.

The main body plate 11 has a circular power supply wire insertion hole 11b through which a power supply wire such as a VVF is inserted at substantially the center thereof, and a mounting darma hole 11c formed at a position closer to the socket base 12 at both longitudinal ends.
However, mounting screw holes 11d are formed in the lamp support base 13 so that they can be mounted on the ceiling surface with wood screws or the like. The socket base 12 is provided with a pair of socket mounting screw holes 12a from the outside thereof, and a socket 4 for mounting a single base fluorescent lamp 5, which is a substantially linear lamp, is mounted by a screw. Is the light guide plate mounting frame 14
A mounting screw hole (not shown) for mounting is provided. The lamp supporting base 13 is formed of an elastic thin plate from the outside thereof, and has a lamp supporting spring 6 for holding the vicinity of the tip of the one-base fluorescent lamp 5 attached thereto. A mounting screw 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 upper surface opened, and a lower surface center portion is a concave portion which is depressed upward in the longitudinal direction, and both ends of the lower surface are contacted by the light guide plate 3 with the upper surface thereof. It is a light guide plate mounting portion 14a to be mounted. The light guide plate mounting portion 14a is provided with three light guide plate mounting holes 14b through which the light guide plate mounting screws 15 are inserted. A socket insertion hole 14c through which the socket 4 is inserted is provided on one of the bottom surfaces of the concave portions in the vicinity of both longitudinal ends in the center of the light guide plate mounting frame 14.
On the other hand, a lamp support spring insertion hole 14d through which the lamp support spring 6 is inserted is formed, and a pair of light control body mounting portions 14e project from the peripheral edge of the concave opening toward the center. A mounting screw hole 14f is provided. Further, a little from the center of the socket insertion hole 14c and the lamp support spring insertion hole 14d on the bottom surface of the concave portion at the center of the light guide plate mounting frame 14, the mounting screw holes provided on the socket base 12 and the lamp support base 13 are provided. A light guide plate mounting frame mounting hole 14g is provided corresponding to the provided mounting screw hole 13a.

The light control body 2 includes a light control body 22 such as a louver and a panel mounted on a light control body mounting frame 12. The light control body 2 has screw insertion holes 21 a formed near both longitudinal ends of the light control body mounting frame 21. The inserted light control body mounting screw 23 is screwed into the light control body mounting screw hole 14f of the light guide plate mounting frame 14 and is mounted on the lighting fixture main body 1, as shown in FIG. Is covered.

As shown in FIG. 4, the light guide plate 3 is formed of a transparent acrylic resin in a substantially rectangular shape, and the upper surface thereof has a smaller distance from the lighting device main body 1 and a smaller distance from the lighting device main body 1. It has a diffusion portion 31 formed by silk printing in a white stripe shape substantially parallel to the lamp to be widened, and a parallel surface whose upper surface and lower surface are parallel in the vicinity of the one-piece fluorescent lamp 5 as a lamp.
At 32, the inclined surface becomes thinner as it goes away from the single-ended fluorescent lamp 5.
33 and 34 are formed.

Of the light emitted from the single-ended fluorescent lamp 5, light directed directly downward from the light-transmitting opening of the lighting fixture main body 1 is glare-cut or diffused by the light control body 3 so that glare is not felt. I have. At this time, since the lamp is a substantially linear one-piece fluorescent lamp 5 and the light-transmitting opening of the lighting fixture body 1 has a size corresponding to the lamp, it is easy to control light.

On the other hand, the light incident on the light guide plate 3 centering on the light directed to the side is guided to the side end of the light guide plate 3 by repeating total reflection in the light guide plate 3, while being incident on the diffusion portion 31. The light is diffusely reflected by the diffusing portion 31 and most of the light exits from below the light guide plate 3 to irradiate the lower portion, and a small portion of the light is also emitted to the upper surface to brighten the ceiling surface. Since the diffusion portion 31 is formed in a stripe shape as described above, substantially uniform luminance can be obtained over the entire surface of the light guide plate 3.

In this lighting fixture, the light emitted from the single base fluorescent lamp 5 is emitted from a wider area by the light guide plate 3, so that the brightness of the lighting fixture can be made relatively low, and high illuminance can be obtained while preventing glare. Yes, the light does not hit the ceiling and feel heavy.

FIG. 5 shows a second embodiment of the present invention. In this lighting apparatus, the lighting device 7 also serves as a socket base, the light guide plate 3 has a substantially quadrangular truncated pyramid shape, and has a substantially rectangular opening 35 through which the one-base fluorescent lamp 5 is inserted at the center thereof. It is covered with a light control body 2 composed of a panel. And even when it looks up from immediately below, since the light control body 2 is a panel, the lamp is not directly seen and the glare can be surely prevented.

FIG. 6 to FIG. 10 show a third embodiment of the present invention. This embodiment is a lighting fixture in which two single base fluorescent lamps 5 are arranged close to each other with their bases close to each other, and is a lighting fixture used as a main lighting in a room, and is basically the same as the first embodiment. It differs in the following points in order to use for two lights.

The lighting fixture body 1 has a socket base 12 substantially at the center of the body plate 11.
A lamp support 13 is provided near both ends in the longitudinal direction, a socket 4 is mounted on the socket base 12, and a lamp support spring 6 is mounted on the lamp support 13 respectively. The main body plate 11 is provided with a circular power supply wire insertion hole 11b through which a power supply wire such as VVF is inserted below the socket base 12 substantially at the center thereof, and is attached to the lamp support base 13 at both longitudinal ends thereof. Dharma hole 11
c and a mounting screw hole 11d are respectively formed so as to be mounted on the ceiling surface with wood screws or the like. The socket base 12 has two pairs of socket mounting screw holes 12a formed substantially symmetrically from the center thereof, and two sockets 4 for mounting one-sided fluorescent lamps 5 which are substantially linear lamps are attached to each other. And attached with screws. The light guide plate 3 is formed of transparent acrylic resin and has an oval shape having a substantially rectangular opening 35 at the center.

In this lighting fixture, the one-piece fluorescent lamp 5 is arranged in a straight line and the light emitted from the one-piece fluorescent lamp 5 is emitted from the light guide plate 3 from a wider area. It is possible to obtain high illuminance while preventing light, and the ceiling surface is not hit by the light, and the light from the one-sided fluorescent lamps 5 does not become too dark in the socket portion. .

The fourth embodiment of the present invention shown in FIGS.
The single-base fluorescent lamps 5 are arranged radially with their base portions close to each other, and the entire periphery thereof is surrounded by the light guide plate 3, so that the directionality of the illuminance distribution in the room 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. 15 are different from the third and fourth embodiments in that a plurality of lamps are arranged on substantially the same plane. , Whereas a plurality of lamps are arranged on different planes crossing each other. Here, in the above embodiment, two lamps are used, but four lamps or the like may be used.

In the fifth embodiment of the present invention shown in FIGS. 13 and 14, the luminaire has a narrow-angle light distribution such that the center of the luminaire is upward and the outer side is downward.

On the other hand, in the sixth embodiment of the present invention shown in FIG. 15, a wide-angle light distribution is obtained in such a manner that the central part of the luminaire is lower and the outer side is upward.

The seventh embodiment of the present invention shown in FIGS. 16 and 17 has the same main components as those of the first embodiment.

In the lighting fixture of the first embodiment, the outer peripheral end face of the light guide plate 3 is substantially parallel to the end face on which light is incident, and light is emitted in a direction substantially perpendicular to the end face of the light guide plate 3, so when viewed from below the room, The problem that the end face looks dark is expected.

Therefore, in this embodiment, the light guide plate 3 has a chamfered surface 37 at the upper edge of the end surface 36 on the side remote from the lighting fixture main body 1, and the chamfered surface 37 is subjected to green printing to provide an end surface diffusion portion. 38. The light incident on the chamfered surface 37 is irregularly reflected by the end surface diffusing portion 38, and light is emitted in various directions vertically and obliquely and looks bright.

In the seventh embodiment, the end surface diffusion portion 38 is substantially planar, but if a large unevenness is provided in the end surface diffusion portion 38 as shown in FIG. 18, a decorative effect can be exhibited.

In the embodiment shown in FIG. 19, only the chamfered surface 37 is provided, and the end surface diffusion portion 38 is made bright by reflection and transmission on the chamfered surface 37.

In the embodiment shown in FIG. 20, a green seal is attached to a chamfered surface 37 to form an end surface diffusion portion 38.

In the embodiment shown in FIG. 21, a green seal is attached to the end face 36 itself to form an end face diffusion portion 38.

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

It should be noted that the lamp is not limited to a single-ended fluorescent lamp, but may be a straight tube fluorescent lamp or the like, and may not have a light control body.
Further, the way of providing the diffusion portion of the light guide plate is not limited to silk printing, and the shape may be a grid shape or a net shape having a different grain size.

〔The invention's effect〕

Since the present invention is configured as described above, the following effects can be obtained.

In the lighting device according to the first aspect, since the light emitted from the lamp is obtained from a large area by the light guide plate, the brightness of the lighting device can be made relatively low, and high illuminance can be obtained while preventing glare. It can be done, and the ceiling surface is not shining, making it feel heavy.

In the lighting device according to the second aspect, high illuminance can be obtained while preventing glare, and the light from the plurality of single-base fluorescent lamps does not become too dark because the light from the plurality of single base fluorescent lamps overlaps each other.

In the lighting device according to the third aspect, the light guide plate can be provided on the entire outer periphery of the lighting device.

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

In the lighting device according to the fifth aspect, since the light control body is provided, the lamp is hard to be directly seen even when looking up from directly below, so that glare can be more reliably prevented.

In the lighting device according to the sixth aspect, the end surface of the light guide plate looks bright even when viewed from below the room.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view, FIG. 2 is a half sectional front view, FIG. 3 is an exploded perspective view, and FIG. It is a front view. FIG. 5 is an exploded perspective view showing a second embodiment of the present invention. 6 to 10 show a third embodiment of the present invention. FIG. 6 is a perspective view, FIG. 7 is a half sectional front view, FIGS. 8 and 9 are exploded perspective views, FIG. 10 is a sectional front view of a main part. 11 and 12 show a fourth embodiment of the present invention. FIG. 11 is a perspective view, and FIG. 12 is a half sectional front view. 13 and 14 show a fifth embodiment of the present invention. FIG. 13 is a perspective view and FIG. 14 is a side view. No.
FIG. 15 is a side view showing a sixth embodiment of the present invention. No. 16
FIG. 17 and FIG. 17 show a seventh embodiment of the present invention. FIG. 16 is a half sectional front view, and FIG. 17 is a principal part sectional front view. FIG. 18 is an exploded perspective view showing an eighth embodiment of the present invention. FIG. 19 to FIG. 22 are cross-sectional front views of essential parts showing different embodiments of the present invention. DESCRIPTION OF SYMBOLS 1 ... Lighting apparatus main body, 2 ... Light control body, 3 ... Light guide plate, 4
… Socket, 5… Single cap fluorescent lamp, 31 …… Diffusion part, 32
... parallel plane, 33 ... inclined plane, 34 ... inclined plane, 36 ... end face, 37 ... chamfered face, 38 ... ... end face diffusion part.

Continuation of front page (72) Inventor Kozo Suzuki 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Co., Inc. (72) Inventor Muneo Okada 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Shinobu Nishikawa 3-4-1-14 Imai, Gojo City, Nara Prefecture Inside Eiwa Denki Co., Ltd. (56) References JP-A-64-45003 (JP, A) JP-A-63-62105 (JP, A) JP-A-62-76205 (JP, A) JP-A-4-32101 (JP, A) JP-A-51-77890 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F21S 4/00 F21V 8/00 601

Claims (6)

(57) [Claims] 1. A light guide plate provided with a lamp in a lighting apparatus main body, and a light guide plate for guiding incident light from one end face close to and facing the lamp to an end part separated from the one end face by total reflection, is substantially equivalent to the lamp. An indoor lighting device, comprising: a light-distributing unit that is disposed laterally and substantially in a direction substantially along the ceiling surface, is disposed on the lighting device main body, and has a diffusing portion that diffusely reflects incident light on an upper surface of the light guide plate. 2. A room according to claim 1, wherein a plurality of single-base fluorescent lamps are provided, and the bases of the single-base fluorescent lamp are arranged close to each other, and a light guide plate is provided on the entire outer periphery of the lighting fixture. Lighting equipment. 3. The indoor lighting fixture according to claim 1, wherein a plurality of single-base fluorescent lamps are radially provided. 4. The lamp according to claim 1, wherein said diffusion portions are formed in stripes substantially parallel to a lamp, the distance between which is smaller toward the outside and the width between the lamps is wider as the outside. Indoor lighting fixtures. 5. The indoor lighting apparatus according to claim 1, further comprising a light control member which covers a lower part of the lamp. 6. An end face diffusion portion for diffusing incident light is provided on an outer peripheral edge of the lighting fixture of the light guide plate.
The indoor lighting fixture according to 2, 3, 4 or 5.