JP5762224B2 - Light control cover for luminaire - Google Patents
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- JP5762224B2 JP5762224B2 JP2011194944A JP2011194944A JP5762224B2 JP 5762224 B2 JP5762224 B2 JP 5762224B2 JP 2011194944 A JP2011194944 A JP 2011194944A JP 2011194944 A JP2011194944 A JP 2011194944A JP 5762224 B2 JP5762224 B2 JP 5762224B2
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- 230000002265 prevention Effects 0.000 claims description 8
- 230000004313 glare Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 230000004907 flux Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000005286 illumination Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
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- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000012463 white pigment Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Description
本発明は、建築物や輸送機関等に設置される照明器具用の光線制御カバーに関するものである。 The present invention relates to a light beam control cover for a lighting fixture installed in a building or a transportation facility.
照明器具には、様々な機能が求められるが、その一つとして、期待する配光方向に対する光束の確保とグレア（眩しさ）の抑制とを両立する機能があげられる。例えば、病室のベッドに横たわる患者に医療従事者が医療行為を施す場合、病室の天井に設置される照明器具には、医療従事者の医療行為に支障を来たさない十分な明るさが求められるし、ベッド上の患者の快適性や安らぎ等がグレアで悪化しないような配慮が求められる。 Various functions are required for a lighting fixture, and one of them is a function that achieves both securing of a luminous flux in an expected light distribution direction and suppressing glare (glare). For example, when a health care worker performs a medical practice on a patient lying in a bed in a hospital room, lighting equipment installed on the ceiling of the hospital room is required to have sufficient brightness so as not to interfere with the medical staff's medical practice. In addition, consideration must be given so that the patient's comfort and comfort on the bed do not deteriorate with glare.
また、美術館の壁面に設置された芸術品を不特定多数の来訪者が鑑賞する場合、美術館内の照明器具には、芸術品を鑑賞する来訪者に対する光束確保と、来訪者がグレアで鑑賞に支障を来たさないような配慮が求められる。さらに、夜間に鉄道車両を利用する乗客が読書する場合、車両壁面等に設置される照明器具には、読書に支障を来たさない光束の確保が求められるし、周辺の他の乗客がグレアで不快感を催さないような配慮が要望される。 In addition, when an unspecified number of visitors appreciate the artworks installed on the walls of the museum, the lighting fixtures in the museum will ensure the luminous flux for visitors who appreciate the artworks, and visitors will appreciate the glare. Consideration that does not cause trouble is required. Furthermore, when passengers using rail cars read a book at night, lighting fixtures installed on the walls of the vehicle are required to secure a luminous flux that does not interfere with reading. Consideration that does not cause discomfort is required.
従来の照明器具は、図４に部分的に示すように、天井に光源４が設置され、遮光部と配光制御部４０とにより照明の範囲を制御し、配光方向に対する光束を確保しながらグレアを抑制するようにしている（特許文献１参照）。 As shown in FIG. 4, the conventional lighting fixture has a light source 4 installed on the ceiling, controls the range of illumination by the light-shielding unit and the light distribution control unit 40, and ensures a light flux in the light distribution direction. Glare is suppressed (see Patent Document 1).
しかしながら、従来の照明器具は、鉛直方向に対する光線の照射角度を小さく制御しようとすると、図５に示すように、配光制御部４０を鉛直方向に伸ばして形成しなければならず、薄型化を図ることができないという問題がある。この問題を解消するため、従来においては、マイクロルーバー４１を使用して鉛直方向に対する光線（矢印参照）の照射角度を小さくする方法が提案されている（図６参照）。しかし、マイクロルーバー４１を使用すると、ルーバーのピッチが細かくなり、遮光部４２の割合が増加するので、光線の透過率が低下するという問題が新たに生じることとなる。 However, in the conventional lighting fixture, when the irradiation angle of the light beam with respect to the vertical direction is to be controlled to be small, the light distribution control unit 40 must be formed to extend in the vertical direction as shown in FIG. There is a problem that it cannot be planned. In order to solve this problem, conventionally, a method has been proposed in which a micro louver 41 is used to reduce the irradiation angle of light rays (see arrows) with respect to the vertical direction (see FIG. 6). However, when the micro louver 41 is used, the pitch of the louvers becomes finer and the ratio of the light shielding portions 42 increases, so that a new problem arises that the light transmittance is lowered.
本発明は上記に鑑みなされたもので、配光方向に対する光束を確保しながらグレアを抑制することができ、しかも、薄型化を実現して光線の透過率を向上させることのできる照明器具用の光線制御カバーを提供することを目的としている。 The present invention has been made in view of the above, and it is possible for a lighting fixture that can suppress glare while securing a light flux in a light distribution direction, and realize lightening and improve light transmittance. It aims to provide a light control cover.
本発明においては上記課題を解決するため、照明器具に、光透過性を有するカバーを取り付け、このカバーの入射面に照明器具の光源からの光線を入射させ、この入射した光線をカバーの出射面から出射させるものであって、
カバーの入射面に、照明器具の光源側に対向する複数の湾曲部を一列に連続して配列し、各湾曲部を、レンズ機能を発揮する断面略半楕円形に膨出形成し、
カバーの出射面に、複数の凸部を所定の間隔で配列して隣接する凸部間に平坦面を区画し、この平坦面を隣接する湾曲部間の境界に対向させ、各凸部を先細りの断面台形に形成してその一対の傾斜面に鏡面処理をそれぞれ施し、
カバーの周面と複数の湾曲部とに光線用の漏洩防止処理をそれぞれ施し、複数の湾曲部と凸部とを対向させるとともに、各湾曲部の幅よりも各凸部の幅を狭くし、各凸部の先端から光線を出射させるようにしたことを特徴としている。
In the present invention, in order to solve the above-described problem, a light-transmitting cover is attached to the lighting fixture, and a light beam from the light source of the lighting fixture is incident on the incident surface of the cover. Which is emitted from
A plurality of curved portions facing the light source side of the lighting fixture are continuously arranged in a row on the incident surface of the cover, and each curved portion bulges into a substantially semi-elliptical cross section that exhibits a lens function,
A plurality of convex portions are arranged at a predetermined interval on the emission surface of the cover, and a flat surface is defined between adjacent convex portions. The flat surface is opposed to a boundary between adjacent curved portions, and each convex portion is tapered. Are formed into a trapezoidal cross-section and mirror-treated on the pair of inclined surfaces,
Each of the peripheral surface of the cover and the plurality of curved portions is subjected to light leakage prevention treatment, the plurality of curved portions and the convex portions are opposed to each other, and the width of each convex portion is made narrower than the width of each curved portion, It is characterized in that a light beam is emitted from the tip of each convex part .
また、カバーの入射面Ｘ方向に複数の湾曲部を一列に連続して配列形成し、各湾曲部をカバーの入射面Ｙ方向に直線的に伸長形成するとともに、カバーの出射面Ｘ方向に複数の凸部を配列形成し、各凸部をカバーの出射面Ｙ方向に直線的に伸長形成することができる。 Further, a plurality of curved portions are continuously formed in a row in the incident surface X direction of the cover, and each curved portion is linearly extended in the incident surface Y direction of the cover, and a plurality of curved portions are formed in the output surface X direction of the cover. The convex portions can be linearly extended in the direction of the exit surface Y of the cover.
また、各湾曲部を分割するとともに、この分割した複数の湾曲部を入射面Ｙ方向に配列形成し、各凸部を分割し、この分割した複数の凸部を出射面Ｙ方向に配列形成することが可能である。
さらに、凸部の先端面における隅部を面取りせず、丸めないように形成することが好ましい。
Further, each curved portion is divided, the plurality of divided curved portions are arrayed in the incident surface Y direction, each convex portion is divided, and the plurality of divided convex portions are arrayed in the exit surface Y direction. It is possible.
Furthermore, it is preferable that the corners on the front end surface of the convex portion are not chamfered and not rounded.
ここで、特許請求の範囲における照明器具は、少なくとも天井や壁面等に取り付けることができる。カバーは、所定のガラス、合成樹脂、ゴム、エラストマーにより形成することができる。このカバーの周面には、光線の漏洩防止の観点から、所定の角度の傾斜が付与されたり、白色顔料が塗布されたり、あるいは鏡面加工が施されることが好ましい。湾曲部は、断面略半楕円形に形成されるが、この断面略半楕円形には、断面半楕円形や半円形、円の一部、あるいはこれらに類似する形状が含まれる。 Here, the luminaire in the claims can be attached to at least a ceiling, a wall surface or the like. The cover can be formed of predetermined glass, synthetic resin, rubber, or elastomer. The peripheral surface of the cover is preferably given a predetermined angle of inclination, coated with a white pigment, or mirror-finished from the viewpoint of preventing light leakage. The curved portion is formed in a substantially semi-elliptical cross section, and the semi-elliptical cross section includes a semi-elliptical cross section, a semicircular shape, a part of a circle, or a shape similar to these.
本発明に係る照明器具用の光線制御カバーを製造する場合には、光線の漏洩防止処理を容易にする観点等から、金型に成形材料を充填して成形することが好ましい。この光線制御カバーは、少なくとも住宅やビル、公共施設、商業施設、病院、航空機、船舶、鉄道車両等に使用することができる。 When manufacturing a light control cover for a lighting apparatus according to the present invention, it is preferable to fill a mold with a molding material from the viewpoint of facilitating light leakage prevention processing. This light control cover can be used at least for houses, buildings, public facilities, commercial facilities, hospitals, airplanes, ships, railway vehicles, and the like.
本発明によれば、照明器具の光源からの光線は、カバー入射面の湾曲部に入射し、カバーの内部を通過して凸部の先端から出射される。この際、光線は、レンズ機能を有する湾曲部に効率的に集光される。また、一部の光線は、空気層との界面で反射を繰り返し、凸部の周面から出射することなく、凸部の先端から出射される。したがって、凸部の周面が発光し、不快なグレアを生じさせることが少ない。 According to the present invention, the light beam from the light source of the luminaire enters the curved portion of the cover incident surface, passes through the inside of the cover, and is emitted from the tip of the convex portion. At this time, the light beam is efficiently condensed on the curved portion having a lens function. Further, some of the light rays are repeatedly reflected at the interface with the air layer, and are emitted from the tip of the convex portion without being emitted from the peripheral surface of the convex portion. Therefore, the peripheral surface of the convex portion emits light, and unpleasant glare is rarely generated.
本発明によれば、配光方向に対する光束を確保しながらグレアを抑制することができるという効果がある。また、照明器具の薄型化を実現し、光線の透過率を向上させることができるという効果がある。また、隣接する凸部間に平坦面を区画し、この平坦面を隣接する湾曲部間の境界に対向させるので、光線が下方から入射するのを規制することができる。 ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that a glare can be suppressed, ensuring the light beam with respect to the light distribution direction. In addition, there is an effect that the light fixture can be thinned and the light transmittance can be improved. In addition, since a flat surface is defined between adjacent convex portions and this flat surface is opposed to a boundary between adjacent curved portions, it is possible to restrict the incidence of light rays from below.
また、カバーの周面と複数の湾曲部とに光線用の漏洩防止処理をそれぞれ施すので、入射した光線が外部に漏洩するおそれを排除することが可能となる。さらに、湾曲部の幅よりも凸部の幅を狭くし、凸部を断面台形に形成してその一対の傾斜面に鏡面処理をそれぞれ施すので、湾曲部からの光線の漏れを防ぎつつ、光線を効果的に照射することが可能となる。Moreover, since the leakage prevention process for light rays is performed on the peripheral surface of the cover and the plurality of curved portions, it is possible to eliminate the possibility of incident light rays leaking to the outside. Furthermore, the width of the convex portion is made narrower than the width of the curved portion, the convex portion is formed into a trapezoidal cross section, and the pair of inclined surfaces are mirror-finished, so that the light beam from the curved portion is prevented from leaking. Can be effectively irradiated.
以下、図面を参照して本発明の実施形態を説明すると、本実施形態における照明器具用の光線制御カバーは、図１ないし図３に示すように、照明器具１に、光透過性を有する透明のカバー１０を装着し、このカバー１０の光線が入射する入射面に複数の湾曲部２０を配列形成するとともに、カバー１０の光線が出射する出射面に複数の凸部３０を配列形成し、これら複数の湾曲部２０と凸部３０とを組み合わせて光源４からの光線を効果的に集光したり、照射することにより、照明効率を低下させることなく、配光方向を制御するようにしている。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A light control cover for a lighting fixture in this embodiment is transparent to the lighting fixture 1 as shown in FIGS. 1 to 3. The cover 10 is mounted, and a plurality of curved portions 20 are arranged on the incident surface on which light rays of the cover 10 are incident, and a plurality of convex portions 30 are arranged on the exit surface from which the light rays of the cover 10 are emitted. The light distribution direction is controlled without reducing the illumination efficiency by effectively condensing or irradiating the light from the light source 4 by combining the plurality of curved portions 20 and the convex portions 30. .
照明器具１は、図１に示すように、例えば室内の天井２に埋設して設置される器具本体３を備え、この器具本体３の内部に複数の光源４が並べて装着されており、この複数の光源４から矢印で示す光線が下方に照射される。器具本体３は、例えば箱形に形成されて下面が開口し、周壁内の一部又は全部に、光源４からの光線を反射する反射板５が装着される。各光源４としては、特に限定されるものではなく、直進性の高い光線を照射するＬＥＤ等の点光源、ＥＬ等の面光源、蛍光灯等が状況に応じて使用される。 As shown in FIG. 1, the lighting fixture 1 includes a fixture body 3 that is embedded and installed in a ceiling 2 of a room, for example, and a plurality of light sources 4 are mounted side by side inside the fixture body 3. A light beam indicated by an arrow is emitted downward from the light source 4. The instrument body 3 is formed, for example, in a box shape, and the lower surface is opened, and a reflection plate 5 that reflects the light beam from the light source 4 is attached to a part or the whole of the peripheral wall. Each light source 4 is not particularly limited, and a point light source such as an LED that irradiates a light beam having high straightness, a surface light source such as an EL, a fluorescent lamp, or the like is used depending on the situation.
カバー１０は、図１や図２に示すように、所定の材料を使用して照明器具１の開口下面６を被覆する大きさ（例えば、２０×３０ｃｍ、３０×３０ｃｍ、６０×６０ｃｍ等）の薄板に形成され、必要に応じて可撓性や屈曲性が付与されており、器具本体３の開口下面６に複数の係止片７を介し着脱自在に装着される。このカバー１０の所定の材料としては、例えばガラス、ポリカーボネート、アクリル樹脂、ウレタンゴム、シリコーンゴム、フェニルシリコーンゴム等があげられる。 As shown in FIGS. 1 and 2, the cover 10 has a size (for example, 20 × 30 cm, 30 × 30 cm, 60 × 60 cm, etc.) that covers a lower surface 6 of the lighting fixture 1 using a predetermined material. It is formed in a thin plate, is provided with flexibility and flexibility as required, and is detachably attached to the opening lower surface 6 of the instrument body 3 via a plurality of locking pieces 7. Examples of the predetermined material for the cover 10 include glass, polycarbonate, acrylic resin, urethane rubber, silicone rubber, and phenyl silicone rubber.
これらの材料において、高い天井２にカバー１０が装着される場合や光線の屈折率を高くしてカバー１０を薄くしたい場合には、ポリカーボネートの採用が好ましい。また、壁面の比較的低い箇所にカバー１０が装着される場合や光線の屈折率を高くしてカバー１０の薄型化を図る場合には、シリコーンゴムやフェニルシリコーンゴム等の使用が好ましい。 In these materials, when the cover 10 is mounted on the high ceiling 2 or when it is desired to make the cover 10 thin by increasing the refractive index of light, it is preferable to use polycarbonate. In addition, when the cover 10 is attached to a relatively low part of the wall surface or when the cover 10 is thinned by increasing the refractive index of light, it is preferable to use silicone rubber or phenyl silicone rubber.
カバー１０の周面１１は、カバー１０に入射した光線が外部に漏洩するおそれがある場合、漏洩防止処理が選択的に施される。この漏洩防止処理としては、例えば（１）カバー１０の周面１１を所定の角度で傾斜させ、光線を閉じ込めながら反射させる処理、（２）カバー１０の周面１１に任意の色彩の顔料を塗布して硬化させる処理、（３）カバー１０の周面１１を鏡面加工し、光線を閉じ込めながら反射させる処理、（４）金型のキャビティに加工した微細な凹凸を転写することにより、カバー１０の周面１１に微細な凹凸を多数形成してモスアイ構造とし、光線の反射を規制してその漏洩を規制する処理等があげられる。 The peripheral surface 11 of the cover 10 is selectively subjected to leakage prevention processing when there is a possibility that the light incident on the cover 10 leaks to the outside. As this leakage prevention process, for example, (1) a process in which the peripheral surface 11 of the cover 10 is inclined at a predetermined angle to reflect light while confining the light beam, and (2) a pigment of any color is applied to the peripheral surface 11 of the cover 10. (3) A process in which the peripheral surface 11 of the cover 10 is mirror-finished and reflected while confining the light beam, and (4) a fine unevenness that has been processed is transferred to the cavity of the mold. A process for forming a moth-eye structure by forming a large number of fine irregularities on the peripheral surface 11 and restricting the reflection of light to restrict leakage thereof can be mentioned.
カバー１０の周面１１に任意の色彩の顔料を塗布する場合、光線を吸収する黒色顔料でも良いが、光線の反射が期待できず、無駄が生じるおそれがある。したがって、光線を透過することなく反射する白色顔料の採用が効率的である。 When a pigment of an arbitrary color is applied to the peripheral surface 11 of the cover 10, a black pigment that absorbs light may be used, but reflection of light cannot be expected, and there is a possibility of waste. Therefore, it is efficient to use a white pigment that reflects light without transmitting it.
複数の湾曲部２０は、図１や図２に示すように、カバー１０の入射面Ｘ方向に一列に連続して配列形成され、各湾曲部２０がカバー１０の入射面Ｙ方向に直線的に伸長形成されており、照明器具１の光源４側に向けられる。隣接する湾曲部２０と湾曲部２０との間は、光線を屈折させて凸部３０内に進行させるため、平面がなく、連続することが好ましい。各湾曲部２０は、直進性の高い光線の他、直進性の低い拡散光をも受光できるよう、表面２１が滑らかな断面略半楕円形に膨出形成され、レンズ機能を発揮する。 As shown in FIGS. 1 and 2, the plurality of curved portions 20 are continuously arranged in a line in the incident surface X direction of the cover 10, and each curved portion 20 is linearly formed in the incident surface Y direction of the cover 10. It is elongated and is directed toward the light source 4 side of the luminaire 1. It is preferable that there is no plane between the adjacent curved portions 20 and the curved portions 20 because the light rays are refracted and advanced into the convex portions 30. Each curved portion 20 has a surface 21 that bulges into a substantially semi-elliptical shape with a smooth cross section so that it can receive not only light that has high straightness but also diffused light that has low straightness, and exhibits a lens function.
湾曲部２０の断面半円弧形に湾曲した滑らかな表面２１、及びカバー１０の周面１１に連なる端面２２は、入射した光線が外部に漏洩するおそれがある場合、漏洩防止処理が選択的に施される。この漏洩防止処理には、上記（１）〜（４）の処理等が採用される。 The smooth surface 21 curved in a semicircular cross section of the curved portion 20 and the end surface 22 connected to the peripheral surface 11 of the cover 10 are selectively subjected to leakage prevention processing when there is a possibility that incident light may leak to the outside. Applied. For the leakage prevention process, the above processes (1) to (4) are adopted.
複数の凸部３０は、図１や図２に示すように、カバー１０の出射面Ｘ方向に所定の間隔で一列に配列形成され、複数の湾曲部２０と相互に対向しており、各凸部３０がカバー１０の出射面Ｙ方向に直線的に伸長形成される。この複数の凸部３０は、隣接する凸部３０と凸部３０との間に、光線の下方からの入射が困難な平坦面３１が区画され、この平坦面３１が隣接する湾曲部２０間の境界に対向する。 As shown in FIG. 1 and FIG. 2, the plurality of convex portions 30 are arranged in a line at a predetermined interval in the exit surface X direction of the cover 10, and are opposed to the plurality of curved portions 20. The portion 30 is linearly extended in the direction of the exit surface Y of the cover 10. In the plurality of convex portions 30, a flat surface 31 in which incidence of light from below is difficult is defined between the adjacent convex portions 30 and the convex portions 30, and the flat surface 31 is between the adjacent curved portions 20. Opposite the boundary.
各凸部３０は、湾曲部２０の幅よりも幅が狭い先細りの断面台形に形成され、周面である一対の傾斜面３２に、入射した光線が外部に漏洩するのを防止する鏡面加工処理がそれぞれ施されており、平坦な先端面３３から光線が出射する。凸部３０の高さや傾斜面３２の傾斜角度は、照明の被写体等に応じて調整される。また、凸部３０間の平坦面３１は、光源４の数や大きさに応じ、広く形成されたり、狭く形成される。凸部３０の先端面３３における二隅部３４は、丸く面取りされると、光線の漏洩を招くおそれがあるので、鋭いエッジであるのが好ましい。 Each convex portion 30 is formed into a tapered cross-sectional trapezoid narrower than the width of the curved portion 20, and a mirror finishing process that prevents the incident light rays from leaking to the pair of inclined surfaces 32 that are the peripheral surfaces. Are applied, and light rays are emitted from the flat tip surface 33. The height of the convex part 30 and the inclination angle of the inclined surface 32 are adjusted according to the illumination subject or the like. Further, the flat surface 31 between the convex portions 30 is formed wide or narrow depending on the number and size of the light sources 4. The two corners 34 of the tip surface 33 of the convex part 30 are preferably sharp edges, since rounded chamfering may cause light leakage.
光線制御カバー１０の製造方法は、特に限定されるものではないが、金型のキャビティに加工した鏡面を転写して鏡面処理を容易にする観点から、ポリカーボネート等の成形材料を用い、金型で射出成形する製法が好ましい。鏡面の表面粗さの最大高さＲｙは、例えば０．２μｍ程度、０．２μｍ前後等とすることができる。 The manufacturing method of the light beam control cover 10 is not particularly limited, but from the viewpoint of facilitating the mirror surface processing by transferring the mirror surface processed into the cavity of the mold, a molding material such as polycarbonate is used and the mold is used. A production method by injection molding is preferred. The maximum height Ry of the surface roughness of the mirror surface can be, for example, about 0.2 μm, around 0.2 μm, or the like.
上記構成において、照明器具１の複数の光源４が点灯すると、光源４の光線は、図３に示すように、カバー１０入射面の湾曲部２０に入射し、カバー１０の内部厚さ方向を通過して凸部３０の主に先端面３３のみから出射され、明るい照明が実現する。この際、光線は、レンズ機能を有する湾曲部２０の表面２１に効率的に集光される。また、一部の光線は、空気層との界面で反射を繰り返し、凸部３０間の平坦面３１や傾斜面３２から出射することなく、凸部３０の主に先端面３３のみから出射される。したがって、カバー１０の平坦面３１や傾斜面３２が発光し、不快なグレアを生じさせることがない。 In the above configuration, when the plurality of light sources 4 of the lighting fixture 1 are turned on, the light rays of the light sources 4 enter the curved portion 20 of the incident surface of the cover 10 and pass through the inner thickness direction of the cover 10 as shown in FIG. Thus, the projection 30 is emitted mainly only from the distal end surface 33, and bright illumination is realized. At this time, the light beam is efficiently collected on the surface 21 of the bending portion 20 having a lens function. Further, some of the light rays are repeatedly reflected at the interface with the air layer, and are emitted mainly from the front end surface 33 of the convex portion 30 without being emitted from the flat surface 31 or the inclined surface 32 between the convex portions 30. . Therefore, the flat surface 31 and the inclined surface 32 of the cover 10 do not emit light and cause unpleasant glare.
上記構成によれば、カバー１０の湾曲部２０と凸部３０とを組み合わせて光束を効果的に集光したり、放射するので、期待する配光方向に対する光束確保とグレアの抑制とを効率的に両立することができる。したがって、例えば、病室の天井２に照明器具１を設置する際、ベッド上の患者の直上に光源４や複数の凸部３０間の平坦面３１が位置するよう調整すれば、医療従事者の医療行為に十分な明るさを確保したり、ベッド上の患者の快適性や安らぎ等がグレアで悪化しないよう配慮することができる。 According to the above configuration, the curved portion 20 and the convex portion 30 of the cover 10 are combined to effectively collect or radiate the luminous flux, so that it is possible to efficiently secure the luminous flux and suppress glare in the expected light distribution direction. Can be compatible. Therefore, for example, when the lighting apparatus 1 is installed on the ceiling 2 of a hospital room, if the flat surface 31 between the light source 4 and the plurality of convex portions 30 is adjusted to be positioned immediately above the patient on the bed, the medical staff's medical care It is possible to ensure sufficient brightness for the action, and to prevent the patient's comfort and comfort on the bed from being deteriorated by glare.
また、凸部３０を鉛直方向に伸ばして形成したりする必要が全くないので、カバー１０の薄型化や軽量化を図ることができる。また、従来例のようなマイクロルーバー４１を使用する必要もないので、遮光部４２の増加に伴う光線の透過率低下を有効に防止することが可能となる。また、カバー１０の材質を選択して可撓性や屈曲性を付与すれば、カバー１０を任意の形に曲げることができるので、作業性、取付性、インテリア性の向上が大いに期待できる。さらに、カバー１０を薄型化することができるので、壁面等にカバー１０を後付けすることも容易となる。 Moreover, since it is not necessary to form the convex part 30 extending in the vertical direction, the cover 10 can be made thinner and lighter. In addition, since it is not necessary to use the micro louver 41 as in the conventional example, it is possible to effectively prevent a decrease in light transmittance due to an increase in the light shielding portion 42. If the material of the cover 10 is selected to give flexibility and bendability, the cover 10 can be bent into an arbitrary shape, so that improvement in workability, mounting property, and interior property can be greatly expected. Furthermore, since the cover 10 can be thinned, it is easy to retrofit the cover 10 to a wall surface or the like.
なお、上記実施形態では室内の天井２に照明器具１の器具本体３を設置した例を主に示したが、これに限定されるものではない。例えば、室内の壁面に照明器具１の器具本体３を設置しても良い。また、器具本体３の開口下面６に一枚のカバー１０ではなく、複数枚のカバー１０を装着しても良い。また、上記実施形態ではカバー１０の入射面Ｙ方向に各湾曲部２０を直線的に伸長させ、カバー１０の出射面Ｙ方向に各凸部３０を直線的に伸長させたが、何らこれに限定されるものではない。 In addition, although the example which mainly installed the fixture main body 3 of the lighting fixture 1 in the indoor ceiling 2 was shown in the said embodiment, it is not limited to this. For example, you may install the fixture main body 3 of the lighting fixture 1 in the wall surface of a room. In addition, a plurality of covers 10 may be attached to the opening lower surface 6 of the instrument body 3 instead of a single cover 10. Moreover, in the said embodiment, although each curved part 20 was extended linearly in the incident surface Y direction of the cover 10, and each convex part 30 was extended linearly in the output surface Y direction of the cover 10, it is not limited to this at all. Is not to be done.
例えば、光源４が多数のＬＥＤからなる点光源の場合、ＬＥＤ光の性質や用途によっては、光線を適切に出射できず、十分な照明を得ることができないおそれが考えられる。このような場合には、各湾曲部２０を分割して入射面Ｙ方向に複数配列形成するとともに、各凸部３０を分割して出射面Ｙ方向に複数配列形成することにより、カバー１０のＸＹ方向に相互に対向する複数の湾曲部２０と凸部３０とを並設し、不特定の方向からの光線を確実に下方に出射させるようにしても良い。 For example, in the case where the light source 4 is a point light source composed of a large number of LEDs, there is a possibility that light cannot be appropriately emitted depending on the nature and application of the LED light, and sufficient illumination cannot be obtained. In such a case, the curved portions 20 are divided to form a plurality of arrays in the incident surface Y direction, and the convex portions 30 are divided to form a plurality of arrays in the exit surface Y direction. A plurality of curved portions 20 and convex portions 30 that are opposed to each other in the direction may be provided side by side so that light rays from an unspecified direction are reliably emitted downward.
また、複数の湾曲部２０を一列に連続配列するのではなく、複数の湾曲部２０を個別に配列し、湾曲部２０と凸部３０のＸ方向における断面形やＹ方向等における断面形を略同一にしても良い。また、湾曲部２０を表面２１が滑らかな断面略半楕円形に膨出形成したが、限定されるものではない。例えば、表面２１の中央以外の箇所が略鋸歯状の略リニアフレネルレンズ形に形成し、湾曲部２０の厚みを抑制してさらなる薄型化を図ることもできる。 Further, instead of continuously arranging the plurality of bending portions 20 in a row, the plurality of bending portions 20 are individually arranged, and the cross-sectional shape in the X direction or the Y direction of the bending portion 20 and the convex portion 30 is substantially omitted. It may be the same. Moreover, although the curved part 20 bulged and formed in the cross-sectional substantially semi-elliptical shape where the surface 21 is smooth, it is not limited. For example, a portion other than the center of the surface 21 can be formed in a substantially sawtooth-like substantially linear Fresnel lens shape, and the thickness of the curved portion 20 can be suppressed to further reduce the thickness.
さらに、凸部３０の幅を湾曲部２０の幅以下にして光線を適切に出射させることができるのであれば、カバー１０の出射面Ｘ方向に複数の凸部３０を一列に連続して配列形成し、隣接する凸部３０間の平坦面３１を省略することが可能である。 Furthermore, if the light beam can be appropriately emitted with the width of the convex portion 30 being equal to or less than the width of the curved portion 20, a plurality of convex portions 30 are continuously arranged in a row in the direction of the emission surface X of the cover 10. In addition, the flat surface 31 between the adjacent convex portions 30 can be omitted.
本発明に係る照明器具用の光線制御カバーは、例えば建築物や輸送機関の照明分野で使用することができる。 The light control cover for lighting equipment according to the present invention can be used, for example, in the lighting field of buildings and transportation.
１ 照明器具
２ 天井
３ 器具本体
４ 光源
６ 開口下面
１０ カバー
１１ 周面
２０ 湾曲部
２１ 表面
２２ 端面
３０ 凸部
３１ 平坦面
３２ 傾斜面（周面）
３３ 先端面（先端）
３４ 隅部
DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Ceiling 3 Appliance main body 4 Light source 6 Opening lower surface 10 Cover 11 Circumferential surface 20 Curved part 21 Surface 22 End surface 30 Convex part 31 Flat surface 32 Inclined surface (circumferential surface)
33 Tip surface (tip)
34 Corner
Claims (1)
カバーの入射面に、照明器具の光源側に対向する複数の湾曲部を一列に連続して配列し、各湾曲部を、レンズ機能を発揮する断面略半楕円形に膨出形成し、
カバーの出射面に、複数の凸部を所定の間隔で配列して隣接する凸部間に平坦面を区画し、この平坦面を隣接する湾曲部間の境界に対向させ、各凸部を先細りの断面台形に形成してその一対の傾斜面に鏡面処理をそれぞれ施し、
カバーの周面と複数の湾曲部とに光線用の漏洩防止処理をそれぞれ施し、複数の湾曲部と凸部とを対向させるとともに、各湾曲部の幅よりも各凸部の幅を狭くし、各凸部の先端から光線を出射させるようにしたことを特徴とする照明器具用の光線制御カバー。 A light control cover for a lighting fixture that attaches a light-transmitting cover to the lighting fixture, causes a light beam from the light source of the lighting fixture to enter the incident surface of the cover, and emits the incident light beam from the emission surface of the cover. There,
A plurality of curved portions facing the light source side of the lighting fixture are continuously arranged in a row on the incident surface of the cover, and each curved portion bulges into a substantially semi-elliptical cross section that exhibits a lens function,
A plurality of convex portions are arranged at a predetermined interval on the emission surface of the cover, and a flat surface is defined between adjacent convex portions. The flat surface is opposed to a boundary between adjacent curved portions, and each convex portion is tapered. Are formed into a trapezoidal cross-section and mirror-treated on the pair of inclined surfaces,
Each of the peripheral surface of the cover and the plurality of curved portions is subjected to light leakage prevention treatment, the plurality of curved portions and the convex portions are opposed to each other, and the width of each convex portion is made narrower than the width of each curved portion, A light beam control cover for a lighting apparatus, wherein a light beam is emitted from the tip of each convex portion .
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| JPS60207206A (en) * | 1984-03-30 | 1985-10-18 | 東芝ライテック株式会社 | Illuminator |
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