JP2008270096A - Lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting fixture capable of brightly illuminating a working surface with an effective use of a light volume of lamps, with prevention of glare caused from direct viewing of the lamps. <P>SOLUTION: The lighting fixture is provided with a lighting fixture main body 2 loading lamps 1 to be a light source, and an illumination cover 3 covering the lamps 1, and lights up the working surface 20 with lamp light irradiated through the illumination cover 3. Of the illumination cover 3, a center part located between the lamps 1 and the working surface 20 is to be a diffusion part 7, a peripheral edge part surrounding which 7 is to be a transparent part 8, and at the same time, a reflector 9 is provided at a position surrounding the illumination cover 3 for converging lamp light transmitting the transparent part 8 on the working surface 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lighting fixture including a lighting cover.

  In lighting fixtures, when the lamp that is the light source is exposed, or when the lamp is covered with a transparent lighting cover, glare occurs when the lamp is directly viewed from the work surface side when it is lit, which may cause discomfort. There is a problem or a problem that the design is lowered because the lamp is visually recognized from the work surface side even when the lamp is not lit. On the other hand, as schematically shown in FIG. 3, the luminaire main body 2 provided with the lamp 1 serving as a light source is provided with a lighting cover 3 that has been subjected to diffusion processing such as embossing so as to cover the lamp 1. The lighting fixture which was made is proposed conventionally (for example, refer patent document 1). If the illumination cover 3 subjected to the diffusion treatment is provided in this way, the lamp 1 can be seen through the illumination cover 3 subjected to the diffusion treatment even when the lamp 1 is viewed from the work surface 20 side when it is turned on. In addition, when the lamp is not lit, the lamp 1 becomes difficult to be visually recognized from the work surface 20 side.

However, the following problem arises in the luminaire simply having the diffusing illumination cover 3 described above. That is, since all of the lamp light emitted from the lamp 1 when lit is transmitted through the illumination cover 3, the entire light amount loss due to transmission loss is increased, and the light subjected to the diffusion process spreads throughout. As a result, the work surface 20 cannot be efficiently illuminated.
JP 2006-294352 A

  The present invention has been invented in view of the above problems, and provides a luminaire capable of brightly illuminating a work surface by effectively using the amount of light of a lamp while preventing glare from directly viewing the lamp. It is a task to do.

  In order to solve the above-mentioned problems, the present invention is based on lamp light that includes a luminaire main body 2 provided with a lamp 1 serving as a light source and an illumination cover 3 that covers the lamp 1 and is irradiated through the illumination cover 3. In the lighting fixture that illuminates the work surface 20, the center portion located between the lamp 1 and the work surface 20 in the lighting cover 3 is the diffusion portion 7, and the peripheral portion surrounding the diffusion portion 7 is the transparent portion 8, It is assumed that a reflector 9 that condenses the lamp light transmitted through the transparent portion 8 toward the work surface 20 is provided.

  In the lighting fixture having the above configuration, the lamp light emitted from the lamp 1 is directly irradiated to the work surface 20 side through the diffusion portion 7 of the lighting cover 3, so that the user on the work surface 20 side looks directly at the lamp 1. This prevents the occurrence of glare. In addition, the diffuser 7 having a low transmittance and low directivity is limited to the central portion of the illumination cover 3, and the other peripheral portion is a transparent portion 8 having a high transmittance and high directivity. Since the transmitted lamp light is provided so as to be condensed on the work surface 20 side via the reflector 9, it is possible to efficiently illuminate the work surface 20 without losing the entire amount of light as much as possible. ing.

  The reflector 9 preferably restricts the area on the work surface 20 side where the lamp 1 can be visually recognized to an area where the lamp 1 is visible only through the diffusion portion 7 of the illumination cover 3. is there. By doing in this way, the situation where the user by the side of the work surface 20 looks at the lamp | ramp 1 and a glare is produced | generated more reliably is prevented.

  The invention according to claim 1 has an effect that the work surface can be brightly illuminated by effectively using the light quantity of the lamp while preventing glare due to direct viewing of the lamp.

  In addition to the effect of the invention according to claim 1, the invention according to claim 2 has an effect that glare can be more reliably prevented.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. In addition, the same code | symbol is attached | subjected about the structure similar to the prior art example shown in FIG. 3, and the overlapping description is abbreviate | omitted. 1 and 2 show an example of a lighting fixture according to an embodiment of the present invention. The luminaire of this example is a downlight for illuminating the work surface 20 from above, and specifically, is suitably used as a sink light that uses the sink in the living room space as the work surface.

  In this example, a plurality (four in the illustrated example) of lamps 1 made of LEDs are installed on a flat lamp installation surface 4 formed in a circular shape as the lower surface of the luminaire main body 2. The lamps 1 are arranged at equal intervals in the circumferential direction on a circumference drawn by a certain width from the outer edge of the lamp installation surface 4 (see FIG. 2).

  A bottomed cylindrical lighting cover 3 that surrounds all the lamps 1 with the lamp installation surface 4 is attached to the lower side of the lighting fixture body 2. The lighting cover 3 includes a bottom wall portion 5 having a disk shape and a cylindrical side wall portion 6 extending upward from the outer peripheral edge of the bottom wall portion 5. The bottom wall portion 5 of the illumination cover 3 is subjected to a textured process so that transmitted light is diffused. Further, the side wall portion 6 of the lighting cover 3 is not subjected to diffusion processing such as embossing, and light is transmitted with high efficiency without being diffused. That is, in this example, the bottom wall portion 5 forming the central portion located between each lamp 1 and the work surface 20 below the lamp cover 3 in the illumination cover 3 has a low transmittance and a low directivity. The side wall part 6 which becomes the part 7 and forms the peripheral part surrounding the diffusion part 7 in the illumination cover 3 has a structure that becomes a transparent part 8 having a high transmittance and high directivity.

  Further, a reflector 9 for reflecting the lamp light transmitted through the transparent side wall 6 of the lighting cover 3 and condensing it on the lower work surface 20 is attached to a position surrounding the lighting cover 3 of the lighting fixture body 2. Yes. The reflector 9 is a skirt-like member formed so that its inner diameter gradually increases as it moves away from the lamp 1 and the illumination cover 3 toward the work surface 20 (that is, downward), and its inner peripheral surface has a reflecting surface 10. It has become.

  The opening edge 11 that opens toward the work surface 20 side of the reflector 9 has a shape that protrudes larger toward the work surface 20 side than the bottom wall portion 5 of the lighting cover 3. As schematically shown in FIG. 1, when a straight line L connecting the point on the opening edge 11 and the point on the edge of the bottom wall portion 5 of the lighting cover 3 is drawn, the inside of the straight line L is drawn. Since the lamps 1 are arranged so as to be positioned at the position of the work surface 20, the reflector 9 serves as a shielding plate for the user located on the work surface 20 side, and only through the bottom wall portion 5 subjected to the diffusion treatment in the lighting cover 3. Each lamp 1 cannot be visually recognized. In other words, the reflector 9 functions as a member for condensing the lamp light transmitted laterally through the transparent side wall 6 downward, and is an area on the work surface 20 side where each lamp 1 can be visually recognized. It functions also as a member which restrict | limits to the area | region (area | region inside the straight line L in a figure) which the lamp | ramp 1 can visually recognize only through the spreading | diffusion part 7 of the illumination cover 3. FIG. In the illustrated example, all the lamps 1 are arranged so as to be located inside the straight line L, but only a part of each lamp 1 may be arranged outside the straight line L.

  With the lighting fixture having the above-described configuration, the lamp light of each lamp 1 is directly irradiated to the work surface 20 side through the diffusion portion 7 of the lighting cover 3, and the user on the work surface 20 side looks directly at the lamp 1. This prevents the occurrence of glare. In addition, the diffusion portion having a low transmittance and low directivity is limited to the bottom wall portion 5 of the lighting cover 3, and the other portion, that is, the side wall portion 6, is a transparent portion having a high transmittance and high directivity. Since the lamp light transmitted through the transparent portion and irradiated to the side is provided so as to be condensed mainly on the peripheral portion of the work surface 20 via the reflector 9, the work surface can be obtained without losing the amount of light as much as possible. 20 can be efficiently illuminated.

  Note that the diffusion process of the bottom wall portion 5 of the illumination cover 3 is not limited to the embossing process, and other means may be used as long as the process diffuses the transmitted lamp light. Further, the lamp 1 is not limited to the LED, and any fluorescent lamp or the like may be used. However, the structure of this example is a structure that is particularly compatible with an LED lighting apparatus using an LED that has a high luminance but a small amount of light compared to a fluorescent lamp. Furthermore, the structure of the present example is not limited to a downlight, and can be applied without any problem as long as the lamp 1 as a light source, the work surface 20, and the position of the worker's viewpoint are in the relationship as shown in FIG. is there.

It is a schematic sectional drawing for description which shows an example lighting fixture in embodiment of this invention. It is a schematic perspective view for description which shows a lighting fixture same as the above. It is a schematic sectional drawing for description which shows the conventional lighting fixture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lamp 2 Lighting fixture main body 3 Lighting cover 7 Diffusion part 8 Transparent part 9 Reflector 20 Work surface

Claims (2)

  A lighting fixture comprising a lighting fixture body having a lamp serving as a light source and a lighting cover covering the lamp, and illuminating a work surface with lamp light transmitted through the lighting cover. A central portion located between the surfaces is a diffusing portion, a peripheral portion surrounding the diffusing portion is a transparent portion, and a reflector for condensing the lamp light transmitted through the transparent portion toward the work surface is provided. Lighting equipment to do.   2. The illumination according to claim 1, wherein the reflector restricts an area on the work surface side where the lamp can be visually recognized to an area where the lamp can be visually recognized only through the diffusion portion of the illumination cover. Instruments.

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