JP2009129751A - Projector with built-in louver - Google Patents

Projector with built-in louver Download PDF

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JP2009129751A
JP2009129751A JP2007304444A JP2007304444A JP2009129751A JP 2009129751 A JP2009129751 A JP 2009129751A JP 2007304444 A JP2007304444 A JP 2007304444A JP 2007304444 A JP2007304444 A JP 2007304444A JP 2009129751 A JP2009129751 A JP 2009129751A
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reflecting mirror
light
lamp
louver
main
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JP5000464B2 (en
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Tatsuya Suzuki
達也 鈴木
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Panasonic Electric Works Co Ltd
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Panasonic Electric Works Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector with built-in louvers that improves illumination efficiency. <P>SOLUTION: The projector 1 with built-in louvers is configured as follows. An almost-conical main reflecting mirror 2 is provided so as to project light of a lamp 8, almost concentrically inserted from a bottom opening part 2a into the main reflecting mirror 2, as almost parallel light a-c from a projection opening 2b while reflecting the light by the main reflecting mirror 2. Arcuate or ring-like louvers 10a-10c are provided inside the main reflecting mirror 2 so as to regulate light diffusion of the lamp 8. Each louver 10a-10c is provided at a position closer to the main reflecting mirror side than the side of the inner diameter D of the bottom opening part 2a of the main reflecting mirror 2. An arcuate or ring-like auxiliary reflecting mirror 11 is provided at a position closer to the lamp side than the side of the inner diameter D of the bottom opening part 2a of the main reflecting mirror 2 so as to partially reflect light of the lamp 8 and to project it as almost parallel light d, e from the projection opening 2b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ルーバー内蔵投光器に関する。   The present invention relates to a projector with a built-in louver.

従来、略円錐コーン状の主反射鏡が設けられて、底開口部から主反射鏡内に略同心状態で挿入されたランプの光を、主反射鏡で反射させて投光開口から略平行光として投光するとともに、この主反射鏡の内部に、ランプの光の拡散を規制する円弧状若しくはリング状のルーバーが設けられたルーバー内蔵投光器がある（特許文献１参照）。   Conventionally, an approximately conical cone-shaped main reflecting mirror is provided, and the light of the lamp inserted in the main reflecting mirror in a substantially concentric state from the bottom opening is reflected by the main reflecting mirror to be substantially parallel light from the projection opening. In addition, there is a louver built-in projector in which an arc-shaped or ring-shaped louver that restricts the diffusion of light from the lamp is provided inside the main reflecting mirror (see Patent Document 1).

前記主反射鏡は、ランプの光を反射させて投光開口から略平行光として投光することで照明するようになる。
実公平７−５１６８２号公報 The main reflecting mirror illuminates by reflecting the light from the lamp and projecting it as substantially parallel light from the projection opening.
No. 7-51682

しかしながら、ルーバーは、ランプの光の拡散を規制する、つまり、投光器の周囲に光が漏れないように規制しているだけであって、ルーバーの反射光は照明に寄与しないので、照明効率が悪いという問題があった。   However, the louver restricts the diffusion of the light from the lamp, that is, restricts the light from leaking around the projector, and the reflected light from the louver does not contribute to the illumination, so the illumination efficiency is poor. There was a problem.

本発明は、前記問題を解消するためになされたもので、照明効率が向上するルーバー内蔵投光器を提供することを目的とするものである。   The present invention has been made to solve the above-described problems, and an object thereof is to provide a louver built-in projector that improves illumination efficiency.

前記課題を解決するために、本発明は、略円錐コーン状の主反射鏡が設けられて、底開口部から主反射鏡内に略同心状態で挿入されたランプの光を、主反射鏡で反射させて投光開口から略平行光として投光するとともに、この主反射鏡の内部に、ランプの光の拡散を規制する円弧状若しくはリング状のルーバーが設けられたルーバー内蔵投光器において、前記主反射鏡の底開口部の内径よりも主反射鏡側寄りに、前記ルーバーが設けられるとともに、前記主反射鏡の底開口部の内径よりもランプ側寄りに、ランプの光の一部を反射させて投光開口から略平行光として投光可能な円弧状若しくはリング状の副反射鏡が設けられていることを特徴とするルーバー内蔵投光器を提供するものである。   In order to solve the above-described problems, the present invention provides a main reflector having a substantially conical cone shape, and the light of a lamp inserted in a substantially concentric state from the bottom opening into the main reflector is received by the main reflector. In the projector with a built-in louver, which is reflected and projected as substantially parallel light from the projection opening, and an arc-shaped or ring-shaped louver is provided inside the main reflecting mirror to restrict the diffusion of light from the lamp. The louver is provided closer to the main reflector than the inner diameter of the bottom opening of the reflector, and a part of the lamp light is reflected closer to the lamp than the inner diameter of the bottom opening of the main reflector. Thus, a louver built-in projector is provided, which is provided with an arc-shaped or ring-shaped sub-reflecting mirror capable of projecting as substantially parallel light from the projection aperture.

請求項２のように、前記副反射鏡は、側面視で湾曲されていることが好ましい。   According to a second aspect of the present invention, the sub-reflecting mirror is preferably curved in a side view.

本発明によれば、主反射鏡の底開口部の内径よりも主反射鏡側寄り、つまり、主反射鏡が機能する部位にはルーバーを設ける一方、主反射鏡の底開口部の内径よりもランプ側寄り、つまり主反射鏡が機能しない部位には、ランプの光の一部を反射させて投光開口から略平行光として投光可能な円弧状若しくはリング状の副反射鏡を設けることにより、副反射鏡でランプの光の一部を反射させて投光開口から略平行光として投光できるようになるので、主反射鏡と相俟って照明効率が向上するようになる。また、本来はルーバーを設ける位置に、ルーバーに代えて副反射鏡を設けることができるから、構造が簡単でコスト安になる。   According to the present invention, a louver is provided closer to the main reflector than the inner diameter of the bottom opening of the main reflector, that is, the portion where the main reflector functions, while the inner diameter of the bottom opening of the main reflector is greater. By providing an arc-shaped or ring-shaped sub-reflecting mirror that is close to the lamp, that is, where the main reflecting mirror does not function, can reflect a part of the light from the lamp and project it as substantially parallel light from the projection opening. Since a part of the light of the lamp is reflected by the sub-reflecting mirror and can be projected as substantially parallel light from the projection opening, the illumination efficiency is improved in combination with the main reflecting mirror. In addition, since a sub-reflecting mirror can be provided instead of the louver at the position where the louver is originally provided, the structure is simple and the cost is reduced.

請求項２によれば、副反射鏡がパラボラアンテナ状となり、集光性が良くなって、より照明効率が向上するようになる。   According to the second aspect, the sub-reflecting mirror has a parabolic antenna shape, the light condensing property is improved, and the illumination efficiency is further improved.

以下、本発明を実施するための最良の形態について、図面を参照しながら詳細に説明する。   Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

図１に示すように、ルーバー内蔵投光器１には、略円錐コーン状の主反射鏡２が設けられて、この主反射鏡２の底開口部２ａには、ソケットカバー３が結合されている。ソケットカバー３には、ルーバー内蔵投光器１を柱等の架台４に固定するためのブラケット５が取付けられている。   As shown in FIG. 1, the louver built-in projector 1 is provided with a main cone 2 having a substantially conical cone shape, and a socket cover 3 is coupled to a bottom opening 2 a of the main reflector 2. A bracket 5 for fixing the louver built-in projector 1 to a base 4 such as a pillar is attached to the socket cover 3.

ソケットカバー３内には給電線６が連結されたソケット７が収納され、このソケット７に、主反射鏡２の投光開口２ｂ側からランプ８の電極部をねじ込んで、ソケット７にランプ８を電気的に接続することにより、ランプ８は、底開口部２ａから主反射鏡２内に略同心状態で挿入されることになる。   A socket 7 to which a feeder 6 is connected is housed in the socket cover 3, and the electrode portion of the lamp 8 is screwed into the socket 7 from the light projection opening 2 b side of the main reflecting mirror 2, and the lamp 8 is inserted into the socket 7. By being electrically connected, the lamp 8 is inserted into the main reflecting mirror 2 from the bottom opening 2a in a substantially concentric state.

そして、ランプ８の光は、主反射鏡２で反射されて投光開口２ｂから略平行光ａ〜ｃ（図２参照）として投光されるようになる。   Then, the light from the lamp 8 is reflected by the main reflecting mirror 2 and is projected as substantially parallel lights a to c (see FIG. 2) from the projection opening 2b.

主反射鏡２の内部の上側には、ランプ８の光の拡散を規制する複数枚（本例では３枚）円弧状のルーバー１０ａ〜１０ｃと副反射鏡１１とが、ステー１２ａ〜１２ｃで支持された状態で同心状に設けられている。このように、主反射鏡２の内部の上側にルーバー１０ａ〜１０ｃを設ければ、上方の漏れ光による周囲民家への光害が抑止される。   A plurality of (three in this example) arcuate louvers 10a to 10c and the sub-reflecting mirror 11 for restricting the light diffusion of the lamp 8 are supported by the stays 12a to 12c on the upper side inside the main reflecting mirror 2. It is provided concentrically in the state where it is made. Thus, if the louvers 10a to 10c are provided on the upper side inside the main reflecting mirror 2, light damage to surrounding private houses due to the upward leaked light is suppressed.

ルーバー１０ａ〜１０ｃと副反射鏡１１とは、開き角度θ１を１２０度に設定していることで円弧状となっており、この開き角度θ１は、９０〜１８０度の範囲で設定することができる。また、ルーバー１０ａ〜１０ｃと副反射鏡１１とは、必ずしも円弧状である必要は無く、開き角度θ１を３６０度に設定したリング状であっても良い。   The louvers 10a to 10c and the sub-reflecting mirror 11 have an arc shape by setting the opening angle θ1 to 120 degrees, and the opening angle θ1 can be set in the range of 90 to 180 degrees. . The louvers 10a to 10c and the sub-reflecting mirror 11 do not necessarily have an arc shape, and may have a ring shape with an opening angle θ1 set to 360 degrees.

ルーバー１０ａ〜１０ｃは、主反射鏡２の底開口部２ａの内径Ｄよりも主反射鏡側寄りに所定の間隔を隔てて、前記略平行光ａ〜ｃに平行となるように設けられている。   The louvers 10a to 10c are provided so as to be parallel to the substantially parallel lights a to c at a predetermined distance closer to the main reflector side than the inner diameter D of the bottom opening 2a of the main reflector 2. .

また、副反射鏡１１は、主反射鏡２の底開口部２ａの内径Ｄよりもランプ側寄りに、最内側のルーバー１０ｃと所定の間隔を隔てて、外向きとなるように設けられている。この外向き角度θ２は、１０〜２０度程度に設定されている。   Further, the sub-reflecting mirror 11 is provided closer to the lamp side than the inner diameter D of the bottom opening 2a of the main reflecting mirror 2 so as to face outward with a predetermined distance from the innermost louver 10c. . The outward angle θ2 is set to about 10 to 20 degrees.

そして、ランプ８の光の一部は、副反射鏡１１で反射されて投光開口２ｂから略平行光ｄ，ｅ（図２参照）として投光されるようになる。なお、投光開口２ｂからは、ランプ８の光の直射光ｆも投光されるようになる。   A part of the light of the lamp 8 is reflected by the sub-reflecting mirror 11 and is projected as substantially parallel light d and e (see FIG. 2) from the light projection opening 2b. Note that the direct light f of the light from the lamp 8 is also projected from the light projection opening 2b.

副反射鏡１１は、側面視で直線状であるが、図３に示すように、側面視でパラボラアンテナ状に湾曲させることもできる。   The sub-reflecting mirror 11 is linear when viewed from the side, but as shown in FIG. 3, it can be curved into a parabolic antenna when viewed from the side.

前記のようなルーバー内蔵投光器１であれば、主反射鏡２の底開口部２ａの内径Ｄよりも主反射鏡側寄り、つまり、主反射鏡２が機能する部位にはルーバー１０ａ〜１０ｃを設ける一方、主反射鏡２の底開口部２ａの内径Ｄよりもランプ側寄り、つまり主反射鏡２が機能しない部位には、副反射鏡１１を設けることにより、副反射鏡１１でランプ８の光の一部を反射させて投光開口２ｂから略平行光ｄ，ｅとして投光できるようになるので、主反射鏡２と相俟って照明効率が向上するようになる。つまり、図２に示したθ３の範囲の光は、副反射鏡１１が無ければ、略平行光ｄ，ｅとして投光されなかったものであり、それが略平行光ｄ，ｅとして投光されることで、照明効率が向上するのである。   In the louver built-in projector 1 as described above, the louvers 10a to 10c are provided closer to the main reflector side than the inner diameter D of the bottom opening 2a of the main reflector 2, that is, at a site where the main reflector 2 functions. On the other hand, by providing the sub-reflecting mirror 11 closer to the lamp side than the inner diameter D of the bottom opening 2a of the main reflecting mirror 2, that is, the portion where the main reflecting mirror 2 does not function, Can be projected as substantially parallel lights d and e from the projection opening 2b, and the illumination efficiency is improved in combination with the main reflecting mirror 2. That is, the light in the range of θ3 shown in FIG. 2 is not projected as substantially parallel light d and e without the sub-reflecting mirror 11, and is projected as substantially parallel light d and e. As a result, the illumination efficiency is improved.

また、本来はルーバーを設ける位置（本例ではルーバー１０ｃよりもさらに中心側の位置）に、ルーバーに代えて副反射鏡１１を設けるだけであるから、コスト安になる。   In addition, since the sub-reflecting mirror 11 is merely provided instead of the louver at a position where the louver is originally provided (in this example, a position closer to the center than the louver 10c), the cost is reduced.

さらに、副反射鏡１１を側面視で湾曲させれば、副反射鏡１１がパラボラアンテナ状となり、集光性が良くなって、より照明効率が向上するようになる。   Furthermore, if the sub-reflecting mirror 11 is curved in a side view, the sub-reflecting mirror 11 becomes a parabolic antenna, the light condensing performance is improved, and the illumination efficiency is further improved.

本発明の実施形態のルーバー内蔵投光器であり、（ａ）は要部断面側面図、（ｂ）は正面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a louver built-in projector of embodiment of this invention, (a) is a principal part cross-sectional side view, (b) is a front view. 本発明の実施形態のルーバー内蔵投光器の光の方向を示す要部断面側面図である。It is a principal part cross-sectional side view which shows the direction of the light of the light projector with a built-in louver of embodiment of this invention. 副反射鏡の変形例の側面断面図である。It is side surface sectional drawing of the modification of a subreflector.

符号の説明Explanation of symbols

１ ルーバー内蔵投光器
２ 主反射鏡
２ａ 底開口部
２ｂ 投光開口
８ ランプ
１０ａ〜１０ｃ ルーバー
１１ 副反射鏡
Ｄ 内径
ａ〜ｅ 平行光 DESCRIPTION OF SYMBOLS 1 Projector 2 with built-in louver Main reflector 2a Bottom opening 2b Projection aperture 8 Lamp 10a-10c Louver 11 Subreflector D Inner diameter ae Parallel light

Claims (2)

略円錐コーン状の主反射鏡が設けられて、底開口部から主反射鏡内に略同心状態で挿入されたランプの光を、主反射鏡で反射させて投光開口から略平行光として投光するとともに、この主反射鏡の内部に、ランプの光の拡散を規制する円弧状若しくはリング状のルーバーが設けられたルーバー内蔵投光器において、
前記主反射鏡の底開口部の内径よりも主反射鏡側寄りに、前記ルーバーが設けられるとともに、前記主反射鏡の底開口部の内径よりもランプ側寄りに、ランプの光の一部を反射させて投光開口から略平行光として投光可能な円弧状若しくはリング状の副反射鏡が設けられていることを特徴とするルーバー内蔵投光器。 An approximately conical cone-shaped main reflecting mirror is provided, and the light of the lamp inserted in a substantially concentric state from the bottom opening into the main reflecting mirror is reflected by the main reflecting mirror and is projected as substantially parallel light from the projection opening. In the louver built-in projector provided with an arc-shaped or ring-shaped louver that regulates the diffusion of the light of the lamp inside the main reflector,
The louver is provided closer to the main reflector than the inner diameter of the bottom opening of the main reflector, and a part of the light of the lamp is placed closer to the lamp than the inner diameter of the bottom opening of the main reflector. A louver built-in projector having an arc-shaped or ring-shaped sub-reflecting mirror that can be reflected and projected as substantially parallel light from a projection opening. 前記副反射鏡は、側面視で湾曲されていることを特徴とする請求項１に記載のルーバー内蔵投光器。   The louver built-in projector according to claim 1, wherein the sub-reflecting mirror is curved in a side view.
JP2007304444A 2007-11-26 2007-11-26 Louver built-in projector Expired - Fee Related JP5000464B2 (en)

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JP2007304444A JP5000464B2 (en) 2007-11-26 2007-11-26 Louver built-in projector

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104214588A (en) * 2013-05-29 2014-12-17 海洋王（东莞）照明科技有限公司 Light projecting lamp with externally-arranged grid
CN104214585A (en) * 2013-05-29 2014-12-17 海洋王（东莞）照明科技有限公司 Light projecting lamp with built-in grid
CN104214589A (en) * 2013-05-29 2014-12-17 海洋王（东莞）照明科技有限公司 Light projecting lamp with externally-arranged grid

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419212U (en) * 1987-07-24 1989-01-31
JPH0751682Y2 (en) * 1987-10-27 1995-11-22 松下電工株式会社 Floodlight with louver
JPH08124402A (en) * 1994-10-25 1996-05-17 Matsushita Electric Works Ltd Floodlighting luminaire
JP2001125197A (en) * 1999-10-27 2001-05-11 Matsushita Electric Ind Co Ltd Light source device, illuminator and projection type display device
JP2004259541A (en) * 2003-02-25 2004-09-16 Cateye Co Ltd Lighting fixture

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419212U (en) * 1987-07-24 1989-01-31
JPH0751682Y2 (en) * 1987-10-27 1995-11-22 松下電工株式会社 Floodlight with louver
JPH08124402A (en) * 1994-10-25 1996-05-17 Matsushita Electric Works Ltd Floodlighting luminaire
JP2001125197A (en) * 1999-10-27 2001-05-11 Matsushita Electric Ind Co Ltd Light source device, illuminator and projection type display device
JP2004259541A (en) * 2003-02-25 2004-09-16 Cateye Co Ltd Lighting fixture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104214588A (en) * 2013-05-29 2014-12-17 海洋王（东莞）照明科技有限公司 Light projecting lamp with externally-arranged grid
CN104214585A (en) * 2013-05-29 2014-12-17 海洋王（东莞）照明科技有限公司 Light projecting lamp with built-in grid
CN104214589A (en) * 2013-05-29 2014-12-17 海洋王（东莞）照明科技有限公司 Light projecting lamp with externally-arranged grid

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