JPH0113163B2 - - Google Patents
Info
- Publication number
- JPH0113163B2 JPH0113163B2 JP16698282A JP16698282A JPH0113163B2 JP H0113163 B2 JPH0113163 B2 JP H0113163B2 JP 16698282 A JP16698282 A JP 16698282A JP 16698282 A JP16698282 A JP 16698282A JP H0113163 B2 JPH0113163 B2 JP H0113163B2
- Authority
- JP
- Japan
- Prior art keywords
- prism
- light
- prism surface
- sections
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 230000004313 glare Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Optical Elements Other Than Lenses (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は照明器具の投光開口に配設し光源から
の光を制御する透光カバーの改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a light-transmitting cover disposed over a light projection opening of a lighting fixture to control light from a light source.
天井面などに埋込んで用いられるダウンライト
器具は一般に器具本体が筒状に形成され、その投
光開口に透光カバーを配設してなつている。
2. Description of the Related Art A downlight fixture that is used by being embedded in a ceiling surface or the like generally has a cylindrical body, and a light-transmitting cover is provided over the light projection opening.
そうして、器具本体が四角筒状をなし、かつ透
光カバーが四角形の板状のものにあつては、透光
カバーから照射される照射パターンはほぼ回転対
称形状であり複数個の照明器具を配設して全般照
明を行なう場合、隣接する配光パターン間に暗部
が生じ均斉度が低下するおそれがある。また、均
斉度を向上させるには、器具間隔を狭めなければ
ならないので、器具の数を増さなければならず、
不経済となるとともに省エネルギ化に反すること
になる。 If the fixture body is square cylindrical and the transparent cover is square plate-shaped, the irradiation pattern emitted from the transparent cover is almost rotationally symmetrical, and multiple lighting fixtures When providing general illumination by arranging a light distribution pattern, there is a risk that dark areas will occur between adjacent light distribution patterns and the degree of uniformity will deteriorate. In addition, to improve symmetry, the spacing between instruments must be narrowed, so the number of instruments must be increased.
This would be uneconomical and go against energy conservation.
このようなことから、プリズムを設けて方形状
の配光パターンを得るようにした透光カバーが提
案されてきている。 For this reason, a light-transmitting cover has been proposed in which a prism is provided to obtain a rectangular light distribution pattern.
たとえば米国特許第3502865号明細書に見られ
るように、四角形状の板状体をなす透光カバーに
複数条の四角形状のプリズムを同心状に設けてな
るものが知られている。 For example, as seen in US Pat. No. 3,502,865, there is known a light-transmitting cover in the form of a rectangular plate with a plurality of rectangular prisms arranged concentrically.
このものはほぼ方形状の配光パターンが得られ
るものであるが、同心状に複数個の四角形のプリ
ズム部を設けたものであるので、第8図に示す床
面30の照射パターン40内から透光カバーを見
ると、第8図のからカバー1を見たときは第1
図においてA,同じくではBが輝いて見える。
さらにの位置からカバーを見た時は隅角部の両
側のプリズム部分2が同時に輝くようになり、急
激な照度変化が生じ、ブライトスポツトが床面に
生じ、照度分布が不均一になる欠点があることが
判明した。 This device provides a substantially rectangular light distribution pattern, but since a plurality of rectangular prism sections are provided concentrically, it is possible to obtain light from within the illumination pattern 40 on the floor surface 30 shown in FIG. When looking at the transparent cover, when looking at cover 1 from Figure 8, the first
In the figure, A and B in the same figure appear to be shining.
When the cover is viewed from a further position, the prism parts 2 on both sides of the corner will shine at the same time, causing a sudden change in illuminance, creating bright spots on the floor, and causing uneven illuminance distribution. It turns out that there is something.
本発明は上述の事情を考慮してなされたもの
で、床面にブライトスポツトが生じることがな
く、方形状の均斉度のよい照射パターンが得られ
る照明器具を提供することを目的とする。
The present invention has been made in consideration of the above-mentioned circumstances, and it is an object of the present invention to provide a lighting fixture that does not produce bright spots on the floor surface and provides a rectangular illumination pattern with good uniformity.
本発明は器具本体の投光開口に配設される透光
カバーを四角形の板状に形成し、板面中央部に第
1のプリズム面、この第1のプリズム面に隣接し
て板面の辺部の外周縁間に辺部に平行な複数条の
プリズム部で4区分に区画した第2プリズム面を
形成し、かつ、板面の隅角部に板面の対角線と交
叉する方向に沿う複数条のプリズム部で4区分に
区画された第3のプリズム面を形成したことを特
徴とする。
In the present invention, a light-transmitting cover disposed over a light emitting opening of a device main body is formed into a rectangular plate shape, and a first prism surface is provided at the center of the plate surface, and a second prism surface is adjacent to the first prism surface. A second prism surface is formed between the outer periphery of the side part and divided into four sections by a plurality of prism parts parallel to the side part, and a second prism surface is formed at the corner part of the plate surface in a direction intersecting the diagonal line of the plate surface. It is characterized in that a third prism surface divided into four sections is formed by a plurality of prism sections.
以下、本発明の詳細を第2図ないし第6図に示
す実施例を参照して説明する。11は器具本体
で、この器具本体11は下面に投光開口12を有
し、たとえば天井面に埋設される四角筒状の埋込
み形を可とする。13は光源で、この光源13は
たとえば高輝度放電ランプで、器具本体11に設
けられたソケツト14に装着されて器具本体11
に配設されている。15は透光カバーで、この透
光カバー15は投光開口12に配設されている。
The details of the present invention will be explained below with reference to the embodiments shown in FIGS. 2 to 6. Reference numeral 11 denotes a device main body, and this device main body 11 has a light projection opening 12 on the lower surface, and can be embedded in a rectangular cylindrical shape, for example, in a ceiling surface. Reference numeral 13 denotes a light source, and this light source 13 is, for example, a high-intensity discharge lamp, which is attached to a socket 14 provided in the appliance body 11 and is connected to the appliance body 11.
It is located in Reference numeral 15 denotes a light-transmitting cover, and this light-transmitting cover 15 is disposed in the light projection opening 12.
この透光カバー15は第3図に示すように四角
形状たとえば正四角形の板状をなし、合成樹脂な
どの透明板材で形成されることを可とする。そし
て、この透光カバー15は板面16の中央部に位
置し、たとえば同心円状の複数条のプリズム部1
7で四角形状に区画形成した第1のプリズム面1
8、この第1のプリズム面18の各辺部に隣接し
てこの第1のプリズム面18および板面16の辺
部19の中央部20間に辺部19に平行な複数条
のプリズム部21で4区分に区画された第2のプ
リズム面22、この第2のプリズム面22および
第1のプリズム面18間の板面隅角部に板面16
の対角線と交叉する方向に沿う複数条のプリズム
部23で4区分に区画された第3のプリズム面2
4が形成されている。そうして、第1および第2
のプリズム面18,22のプリズム部17および
21は第4図に示すように形成され、光源13か
ら照射された光を最大ビーム角αが約35゜となる
ようにプリズム角度を設定している。また、第3
のプリズム面24のプリズム部23は第5図に示
すように形成され、光源13から照射された光を
最大ビーム角βが約45゜となるようにプリズム角
度を設定している。 As shown in FIG. 3, the light-transmitting cover 15 has a rectangular shape, for example, a square plate shape, and may be made of a transparent plate material such as synthetic resin. The light-transmitting cover 15 is located at the center of the plate surface 16, and includes, for example, a plurality of concentric prism portions 1.
The first prism surface 1 is partitioned into a rectangular shape by 7.
8. Adjacent to each side of the first prism surface 18, a plurality of prism sections 21 parallel to the side 19 are provided between the first prism surface 18 and the center 20 of the side 19 of the plate surface 16. A second prism surface 22 is divided into four sections, and a plate surface 16 is formed at the corner of the plate surface between this second prism surface 22 and the first prism surface 18.
The third prism surface 2 is divided into four sections by a plurality of prism sections 23 extending in a direction intersecting the diagonal line of the third prism surface 2.
4 is formed. Then the first and second
The prism parts 17 and 21 of the prism surfaces 18 and 22 are formed as shown in FIG. 4, and the prism angle is set so that the maximum beam angle α of the light emitted from the light source 13 is about 35°. . Also, the third
The prism portion 23 of the prism surface 24 is formed as shown in FIG. 5, and the prism angle is set so that the maximum beam angle β of the light emitted from the light source 13 is approximately 45°.
第1,第2のプリズム面18,22のプリズム
部17、および21を最大ビーム角約35゜に設定
することは35゜以下にすると器具直下方向の光が
増加してしまい照度の均斉度が低下してしまう。
また、第3のプリズム面24のプリズム部23を
最大ビーム角約45゜に設定することは45゜以上にす
ると、光源13の大きさなどの問題から60゜以上
にも光が射出されてしまいグレアが生じてしまう
不都合があるためである。 Setting the prism sections 17 and 21 of the first and second prism surfaces 18 and 22 to a maximum beam angle of approximately 35 degrees is important.If the maximum beam angle is set to less than 35 degrees, the light directly below the fixture will increase and the uniformity of illuminance will deteriorate. It will drop.
Furthermore, if the maximum beam angle of the prism section 23 of the third prism surface 24 is set to approximately 45 degrees, if the beam angle is set to 45 degrees or more, the light may be emitted at an angle of 60 degrees or more due to problems such as the size of the light source 13. This is because there is an inconvenience that glare may occur.
つぎに、この実施例の作用について説明する。
器具本体11に配設された光源13から放射され
る光は透光カバー15の第1,第2および第3の
プリズム面18,22,24によつて制御され、
第1,第2のプリズム面18,22を透過した光
は第6図の配光特性曲線Xで示される配光が得ら
れ第1,第3のプリズム面18,24を透過した
光は第6図の曲線Yで示される配光が得られ、照
度分布もほぼ均一となり、ブライトスポツトが生
じないことが確められた。 Next, the operation of this embodiment will be explained.
The light emitted from the light source 13 disposed in the instrument body 11 is controlled by the first, second and third prism surfaces 18, 22, 24 of the transparent cover 15,
The light that has passed through the first and second prism surfaces 18 and 22 has a light distribution shown by the light distribution characteristic curve X in FIG. The light distribution shown by curve Y in FIG. 6 was obtained, the illuminance distribution was also almost uniform, and it was confirmed that no bright spots were generated.
さらに、第図8の床面40に示す照射パターン
内から透光カバー15を見たとき、第7図に示す
ように、照射パターン内のから、さらにと
移動してカバーを見たとき、ではA′部、で
はB′部が輝いて見え、隅角部のプリズム部は板
面の対角線と交叉する方向に沿つて形成されてい
るので、の地点ではA′部,B′部と同様の輝き
のC′部となり、急激な照度変化が生じることがな
く、ブライトスポツトいわゆるぎらつきを良好に
防止することができる。 Furthermore, when the transparent cover 15 is viewed from inside the irradiation pattern shown on the floor surface 40 in FIG. 8, and as shown in FIG. At section A', section B' appears to be shining, and the prism section at the corner is formed along the direction that intersects the diagonal line of the board surface, so at point A' and section B', It becomes the C' part of brightness, and sudden changes in illumination do not occur, and bright spots, so-called glare, can be effectively prevented.
本発明を上述の実施例について説明したが本発
明はこれに限定されるものではない。たとえば第
1のプリズム面は同心上の四角形状のプリズム部
で形成してもよい。また、透光カバーは長四角形
状に形成したものであつてもよい。この場合は長
四角形状の配光パターンとなる。この場合でも、
板面隅角部のプリズム面は板面の対角線と直交す
る方向に沿うプリズム部を形成することを要す
る。 Although the present invention has been described with respect to the above embodiments, the present invention is not limited thereto. For example, the first prism surface may be formed of concentric rectangular prism parts. Further, the light-transmitting cover may be formed into a rectangular shape. In this case, the light distribution pattern is rectangular. Even in this case,
The prism surfaces at the corners of the plate surface are required to form prism portions extending in a direction perpendicular to the diagonal line of the plate surface.
さらに、器具本体は円筒状であつても、透光カ
バーが四角形状であればこの発明は適用できる。
さらにまた、埋込形に限らず天井直付け形など各
種照明器具に適用できる。 Furthermore, even if the device main body is cylindrical, the present invention can be applied as long as the transparent cover is square.
Furthermore, it can be applied not only to recessed type lighting fixtures but also to various types of lighting fixtures such as those that are directly attached to the ceiling.
以上詳述したように、本発明によれば、四角形
状の透光カバーの隅角部において急激な照度変化
が生じることがなく、ブライトスポツトいわゆる
ぎらつきを良好に防止することができるとともに
輝度むらのない均一の照度で照明することができ
る。
As described in detail above, according to the present invention, sudden changes in illuminance do not occur at the corners of a rectangular transparent cover, and it is possible to effectively prevent bright spots, so-called glare, and to reduce unevenness in brightness. It can be illuminated with uniform illuminance without any brightness.
第1図は従来の透光カバーにおける輝きを示す
説明図、第2図は本発明の一実施例を示す照明器
具の一部を切欠いた正面図、第3図は同じく透光
カバーの平面図、第4図は同じく第3図の―
線に沿つて一部を省略した断面拡大図、第5図は
同じく第3図のV―V線に沿つて一部を省略した
断面拡大図、第6図は同じく照明器具における配
光曲線図、第7図は同じく透光カバーにおける輝
きを示す説明図、第8図は照射パターンを示す説
明図である。
11……器具本体、12……投光開口、13…
…光源、15……透光性カバー、18……第1の
プリズム面、22……第2のプリズム面、24…
…第3のプリズム面。
Fig. 1 is an explanatory diagram showing the shine in a conventional translucent cover, Fig. 2 is a partially cutaway front view of a lighting fixture showing an embodiment of the present invention, and Fig. 3 is a plan view of the translucent cover as well. , Figure 4 is the same as Figure 3 -
FIG. 5 is an enlarged cross-sectional view along the line V-V in FIG. 3 with a portion omitted, and FIG. 6 is a light distribution curve diagram of the lighting equipment. , FIG. 7 is an explanatory diagram showing the shine in the transparent cover, and FIG. 8 is an explanatory diagram showing the irradiation pattern. 11... Instrument body, 12... Light projection opening, 13...
...Light source, 15... Translucent cover, 18... First prism surface, 22... Second prism surface, 24...
...Third prism surface.
Claims (1)
央部に位置し複数条のプリズム部で形成した第1
のプリズム面と、 この第1のプリズム面の各辺部に隣接してこの
第1のプリズム面および辺部の外周縁間に辺部に
平行な複数条のプリズム部で形成され4区分に区
画された第2のプリズム面と、 この第2のプリズム面および第1のプリズム面
間の板面隅角部に板面の対角線と交叉する方向に
沿う複数条のプリズム部で形成され4区分に区画
された第3のプリズム面と、 を含んで形成されていることを特徴とする照明器
具。 2 前記透光性カバーの第1のプリズム面は同心
円状のプリズム部で形成されていることを特徴と
する特許請求の範囲1記載の照明器具。 3 前記透光性カバーは正四角形状に形成されて
いることを特徴とする特許請求の範囲1または2
記載の照明器具。[Scope of Claims] 1. A device comprising: a device body having a light projection opening on the lower surface; a light source disposed in the device body; and a translucent cover disposed in the light projection opening; The optical cover has a rectangular plate shape, and the first part is located in the center of the plate surface and is formed by multiple prism parts.
a prism surface, and a plurality of prism sections adjacent to each side of the first prism surface and parallel to the side between the first prism surface and the outer periphery of the side, and partitioned into four sections. It is formed of a second prism surface, which has a second prism surface, and a plurality of prism parts extending in a direction intersecting the diagonal of the plate surface at the corner portion of the plate surface between the second prism surface and the first prism surface, and is divided into four sections. A lighting fixture comprising: a divided third prism surface; 2. The lighting device according to claim 1, wherein the first prism surface of the translucent cover is formed of a concentric prism section. 3. Claim 1 or 2, wherein the light-transmitting cover is formed in a regular square shape.
Lighting equipment as described.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16698282A JPS5956301A (en) | 1982-09-24 | 1982-09-24 | Illuminator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16698282A JPS5956301A (en) | 1982-09-24 | 1982-09-24 | Illuminator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5956301A JPS5956301A (en) | 1984-03-31 |
JPH0113163B2 true JPH0113163B2 (en) | 1989-03-03 |
Family
ID=15841203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16698282A Granted JPS5956301A (en) | 1982-09-24 | 1982-09-24 | Illuminator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5956301A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59177801A (en) * | 1983-03-29 | 1984-10-08 | 東芝ライテック株式会社 | Illuminator |
JPS6051985A (en) * | 1983-08-31 | 1985-03-23 | Pentel Kk | Tablet input device |
JPS60143503A (en) * | 1983-12-28 | 1985-07-29 | 東芝ライテック株式会社 | Illuminator |
-
1982
- 1982-09-24 JP JP16698282A patent/JPS5956301A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5956301A (en) | 1984-03-31 |
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