JP2601713Y2 - Lighting equipment - Google Patents
Lighting equipmentInfo
- Publication number
- JP2601713Y2 JP2601713Y2 JP1992012771U JP1277192U JP2601713Y2 JP 2601713 Y2 JP2601713 Y2 JP 2601713Y2 JP 1992012771 U JP1992012771 U JP 1992012771U JP 1277192 U JP1277192 U JP 1277192U JP 2601713 Y2 JP2601713 Y2 JP 2601713Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- filament
- emitted
- bulb
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0091—Reflectors for light sources using total internal reflection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
- F21L4/00—Electric lighting devices with self-contained electric batteries or cells
- F21L4/005—Electric lighting devices with self-contained electric batteries or cells the device being a pocket lamp
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/0025—Combination of two or more reflectors for a single light source
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Optical Elements Other Than Lenses (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案は照明装置に関し、特に
光源と反射鏡とからなる懐中電灯のような照明装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device, and more particularly to a lighting device such as a flashlight comprising a light source and a reflector.
【０００２】[0002]
【従来の技術】図３は従来の懐中電灯の構成を示す断面
図である。2. Description of the Related Art FIG. 3 is a sectional view showing the structure of a conventional flashlight.
【０００３】図を参照して、従来の懐中電灯は、電池収
納部１５を保護するボディＡ１３と、収納部１５に収納
された電池をカバーする電池カバー１７と、電球７を保
護するボディＢ２１とから構成される。ボディＢ２１に
は、電球７から発せられた光を前方に反射するための反
射鏡１がその周囲に取付けられ、電球７の前方には、照
射範囲を広げるためのレンズ１９が取付けられている。Referring to FIG. 1, a conventional flashlight includes a body A13 for protecting a battery housing 15, a battery cover 17 for covering a battery housed in the housing 15, and a body B21 for protecting a light bulb 7. Consists of A reflector 1 for reflecting light emitted from the light bulb 7 forward is attached to the body B21, and a lens 19 for expanding the irradiation range is attached to the front of the light bulb 7.
【０００４】図４は図３の懐中電灯の電球および反射鏡
周りの構成を示す拡大断面図である。FIG. 4 is an enlarged sectional view showing the structure around the light bulb and the reflector of the flashlight of FIG.
【０００５】まず基準座標として、電球７の中心を通る
軸をＸ−Ｙ軸とし、電球７のフィラメント９の位置を原
点Ｏとする。反射鏡１の前方終端部をＣとし、その後方
終端部をＤとする。Ｘ−Ｙ軸を中心として上下対称であ
るので以下の説明ではＸ−Ｙ軸の上半分についてのみ説
明する。First, as reference coordinates, an axis passing through the center of the light bulb 7 is set as an XY axis, and a position of the filament 9 of the light bulb 7 is set as an origin O. The front end of the reflecting mirror 1 is C, and the rear end thereof is D. Since it is vertically symmetrical about the XY axis, only the upper half of the XY axis will be described below.
【０００６】この例では∠ＣＯＹは３７．５°、∠ＤＯ
Ｙは９２．４°となっている。したがって∠ＣＯＹの範
囲に対して発光されたフィラメント９の光束は、反射鏡
１によって反射されずにそのまま前方へ照射される。∠
ＤＯＣの範囲に対して発光されたフィラメント９の光束
は反射鏡１によって反射され、軸ＯＹに対して平行な光
束となって前方に照射される。In this example, ∠COY is 37.5 °, ∠DO
Y is 92.4 °. Therefore, the luminous flux of the filament 9 emitted in the range of ∠COY is radiated forward without being reflected by the reflecting mirror 1. ∠
The luminous flux of the filament 9 emitted in the range of the DOC is reflected by the reflecting mirror 1 and radiated forward as a luminous flux parallel to the axis OY.
【０００７】結局フィラメント９から発光された光束は
∠ＤＯＹ（９２．４°）の範囲の光束のみが前方に照射
されることになる。この前方へ照射される光束の範囲か
ら規定される立体角ＡＮＧを求めると、 ＡＮＧ＝５．２４８（ステラジアン） となる。フィラメント９が全方位に対して均等に発光さ
れるとして、この立体角ＡＮＧに基づいて光束利用効率
Ｒを求めると、 Ｒ＝４１．８％ となる。As a result, as for the light beam emitted from the filament 9, only the light beam in the range of ∠DOY (92.4 °) is irradiated forward. When the solid angle ANG defined from the range of the light beam irradiated forward is obtained, ANG = 5.248 (steradian). Assuming that the filament 9 emits light uniformly in all directions, the luminous flux utilization efficiency R is calculated based on the solid angle ANG, and R = 41.8%.
【０００８】[0008]
【考案が解決しようとする課題】上記のような従来の懐
中電灯では、フィラメントの位置から後方に発光するよ
うな電球（立体角が６．２８ステラジアンを超える光源
を意味する）を用いる場合後方への光束を十分有効に利
用しているとは言えない。In a conventional flashlight as described above, when a light bulb emitting light from the filament position to the rear is used (meaning a light source having a solid angle exceeding 6.28 steradians), the flashlight is moved backward. It cannot be said that the luminous flux is used effectively.
【０００９】そこで、後方への光束を前方への照射に利
用しようとした例が図５に示されている。図５において
∠ＣＯＹは３７．５°であって図４と同様であるが、∠
ＤＯＹが１２５．０°となって図４の該当角度に対して
大きくなっている。この場合の立体角ＡＮＧ1 および光
束利用効率Ｒ1 を求めると、 ＡＮＧ1 ＝８．５８８７（ステラジアン） Ｒ1 ＝６８．３％ となり、光束の利用効率が大幅に拡大する。しかしなが
ら、∠ＣＯＹを一定とした光束の利用効率を向上させる
とすると、図５から明白なように反射鏡１が図４に比べ
て大きくなってしまう（図のＬ寸法参照）。図６は図５
の反射鏡を懐中電灯に組込んだ場合の断面図であるが、
図３に比べて電球周りの構造がかなり大きくなり、コン
パクトでかつ光束利用効率の高い照明装置とはならな
い。FIG. 5 shows an example in which a backward light beam is used for forward irradiation. In FIG. 5, ∠COY is 37.5 °, which is the same as in FIG.
DOY is 125.0 °, which is larger than the corresponding angle in FIG. When the solid angle ANG 1 and the light beam utilization efficiency R 1 in this case are obtained, ANG 1 = 8.5878 (steradian) R 1 = 68.3%, and the light beam utilization efficiency is greatly increased. However, if the utilization efficiency of a light beam with a constant ∠COY is to be improved, as is apparent from FIG. 5, the size of the reflecting mirror 1 is larger than that of FIG. 4 (see the L dimension in the drawing). FIG. 6 shows FIG.
It is a cross-sectional view of the case where the reflector of
The structure around the light bulb is considerably larger than that in FIG. 3, and the lighting device is not compact and has high light flux utilization efficiency.
【００１０】この考案は上記のような課題を解決するた
めになされたもので、光束利用効率が高くかつコンパク
トな照明装置を提供することを目的とする。The present invention has been made to solve the above-described problems, and has as its object to provide a compact lighting device having high light flux utilization efficiency.
【００１１】[0011]
【課題を解決するための手段】この考案に係る照明装置
は、その照射範囲から規定される立体角が６．２８ステ
ラジアンを超える光源と、光源から発せられた光を反射
して前方へ照射する反射鏡と、光源の位置から少なくと
も後方の位置に設けられ、光源から発せられた光を反射
して光源の方向へ照射する再帰性反射部とを備えたもの
である。A lighting device according to the present invention reflects a light source having a solid angle defined by its irradiation range exceeding 6.28 steradians, and reflects light emitted from the light source to irradiate the light forward. It is provided with a reflecting mirror and a retroreflector provided at least at a position behind the light source and reflecting light emitted from the light source and irradiating the light toward the light source.
【００１２】[0012]
【作用】この考案においては、光源から後方に発せられ
る光が再帰性反射部によって反射されて光源の方向へ照
射される。In the present invention, the light emitted backward from the light source is reflected by the retroreflective portion and emitted toward the light source.
【００１３】[0013]
【実施例】図１はこの考案の一実施例による懐中電灯の
構造を示す断面図であり、図２は図１の電球および反射
鏡周りを拡大した断面構造図である。FIG. 1 is a sectional view showing the structure of a flashlight according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the area around the bulb and the reflector in FIG.
【００１４】懐中電灯の外観部分は図３に示した従来の
懐中電灯の外観部分と同様であるので、ここでの説明は
繰返さないものとし、図２に基づいて光源周りの構造に
ついて以下詳細に説明する。Since the appearance of the flashlight is the same as that of the conventional flashlight shown in FIG. 3, the description will not be repeated here, and the structure around the light source will be described in detail below with reference to FIG. explain.
【００１５】図において、電球７のフィラメント９の位
置からほぼ前方に反射鏡１が設けられ、反射鏡１と電球
７を挿入して固定するソケット１１との間に再帰性反射
部５が設けられている。In FIG. 1, a reflector 1 is provided substantially forward of the filament 9 of the bulb 7, and a retroreflector 5 is provided between the reflector 1 and a socket 11 into which the bulb 7 is inserted and fixed. ing.
【００１６】取付けピース３が接続された反射鏡１の構
造および機能は図４で示した反射鏡１と基本的に同一で
ある。すなわち、∠ＣＯＹは３７．５°であり、∠ＤＯ
Ｙは９２．４°である。したがって、∠ＣＯＹの範囲に
発光されたフィラメント９からの光束はそのまま前方に
照射され、∠ＤＯＣの範囲に発光されたフィラメント９
からの光束は、反射鏡１によって反射され軸ＯＹと平行
な光束となって前方に照射される。The structure and function of the reflector 1 to which the mounting piece 3 is connected are basically the same as those of the reflector 1 shown in FIG. That is, ∠COY is 37.5 ° and ∠DO
Y is 92.4 °. Therefore, the luminous flux from the filament 9 emitted in the range of ＹCOY is directly irradiated forward, and the filament 9 emitted in the range of ∠DOC is emitted.
Is reflected by the reflecting mirror 1 and is emitted forward as a light beam parallel to the axis OY.
【００１７】一方、再帰性反射部５はフィラメントＯを
中心とした球面上に直角状の突起が図のように複数形成
された透明の樹脂等によって成形された反射体である。
たとえば、フィラメント９から再帰性反射部５のＡ点に
向かった光はその直角の突起部分の内面で反射され、Ｏ
Ａと平行な光となってフィラメント９方向に向かう。そ
して、フィラメント９の近傍を通過した光は反射鏡１の
下面のＢ点に入射し、そこで反射されてほぼ軸ＯＹと平
行な光束となって前方に向かう。On the other hand, the retroreflective section 5 is a reflector formed of a transparent resin or the like in which a plurality of perpendicular projections are formed on a spherical surface around the filament O as shown in the figure.
For example, the light traveling from the filament 9 to the point A of the retroreflective portion 5 is reflected by the inner surface of the right-angled projection, and
The light becomes parallel to A and travels toward the filament 9. Then, the light that has passed near the filament 9 enters the point B on the lower surface of the reflecting mirror 1 and is reflected there to become a light beam substantially parallel to the axis OY and travels forward.
【００１８】このように、再帰性反射部５を設けること
によって、フィラメント９の位置から後方へ向かう光も
前方へ照射する光として利用することが可能となる。こ
の場合∠ＥＯＹ（１２５．０°）の範囲の光束が前方に
照射されるので、その立体角ＡＮＧ2 は、 ＡＮＧ2 ＝８．５８８７（ステラジアン） となり、その光束利用効率Ｒ2 は Ｒ2 ＝６８．３％ となる。結果としてこの実施例による懐中電灯はその反
射鏡部分のＬ寸法は従来例として示した図３および図４
の懐中電灯と同じでありながら、その反射効率は図５お
よび図６の懐中電灯に匹敵する照明装置となる。As described above, by providing the retroreflective portion 5, light traveling backward from the position of the filament 9 can be used as light for irradiating forward. In this case, since a light beam in the range of ∠EOY (125.0 °) is emitted forward, the solid angle ANG 2 becomes ANG 2 = 8.58787 (steradian), and the light beam use efficiency R 2 is R 2 = 68.3%. As a result, the flashlight according to this embodiment has the L dimension of the reflecting mirror portion shown in FIGS.
5 and 6, but with a reflection efficiency comparable to the flashlights of FIGS. 5 and 6.
【００１９】なお、上記実施例では、複数の直角の段を
有する再帰性反射部を設けているが、これに代えて球面
ミラーのようなフィラメント９からの光をフィラメント
方向に戻すことができる反射装置を設けてもよい。In the above-described embodiment, the retroreflective portion having a plurality of right-angled steps is provided. Instead, the light from the filament 9 such as a spherical mirror can be returned to the filament direction. A device may be provided.
【００２０】[0020]
【考案の効果】この考案は以上説明したとおり、光源か
ら後方に発せられる光が再帰性反射部によって反射され
て光源の方向へ照射されるので、コンパクトでかつ光束
利用効率の高い照明装置となる効果がある。According to the present invention, as described above, since the light emitted backward from the light source is reflected by the retroreflective portion and irradiated toward the light source, the lighting device is compact and has high light flux utilization efficiency. effective.
【図１】この考案の一実施例による懐中電灯の構造を示
す断面図である。FIG. 1 is a sectional view showing a structure of a flashlight according to an embodiment of the present invention.
【図２】図１の電球周りの構造を示す拡大断面図であ
る。FIG. 2 is an enlarged sectional view showing a structure around a light bulb in FIG.
【図３】従来の懐中電灯の構造を示す断面図である。FIG. 3 is a cross-sectional view showing a structure of a conventional flashlight.
【図４】図３の電球周りの構造を示す拡大断面図であ
る。FIG. 4 is an enlarged sectional view showing a structure around a light bulb in FIG. 3;
【図５】従来の懐中電灯の電球周りの他の例の構造を示
す拡大断面図である。FIG. 5 is an enlarged sectional view showing the structure of another example around a bulb of a conventional flashlight.
【図６】図５の電球周りの構造を組込んだ従来の他の懐
中電灯の構造を示す断面図である。FIG. 6 is a cross-sectional view showing the structure of another conventional flashlight incorporating the structure around the light bulb of FIG. 5;
１ 反射鏡 ５ 再帰性反射部 ７ 電球 ９ フィラメント なお、各図中同一符号は同一または相当部分を示す。 DESCRIPTION OF SYMBOLS 1 Reflecting mirror 5 Retroreflective part 7 Light bulb 9 Filament The same code in each figure shows the same or corresponding part.
Claims (1)
６．２８ステラジアンを超える光源と、 前記光源から発せられた光を反射して前方へ照射する反
射鏡と、 前記光源の位置から少なくとも後方の位置に設けられ、
前記光源から発せられた光を反射して前記光源の方向へ
照射する再帰性反射部とを備えた、照明装置。1. A light source having a solid angle defined by the irradiation range exceeding 6.28 steradians, a reflecting mirror for reflecting light emitted from the light source and irradiating the light forward, and at least rearward from a position of the light source. At the position of
A retroreflector for reflecting light emitted from the light source and irradiating the light toward the light source;
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992012771U JP2601713Y2 (en) | 1992-03-13 | 1992-03-13 | Lighting equipment |
| NZ24708693A NZ247086A (en) | 1992-03-13 | 1993-03-09 | Light source (eg torch) with tandem reflectors |
| EP19930103850 EP0560327B1 (en) | 1992-03-13 | 1993-03-10 | Flashlight including two reflecting mirrors for one light source |
| AU35108/93A AU662803B2 (en) | 1992-03-13 | 1993-03-10 | A flashlight including two reflecting mirrors for one light source |
| DE1993601473 DE69301473T2 (en) | 1992-03-13 | 1993-03-10 | Flashlight with two reflectors for a single light source |
| CA 2092600 CA2092600C (en) | 1992-03-13 | 1993-03-12 | Lighting apparatus including two reflecting mirrors for one light source |
| HK98106412A HK1007185A1 (en) | 1992-03-13 | 1998-06-24 | Flashlight including two reflecting mirrors for one light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992012771U JP2601713Y2 (en) | 1992-03-13 | 1992-03-13 | Lighting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0575901U JPH0575901U (en) | 1993-10-15 |
| JP2601713Y2 true JP2601713Y2 (en) | 1999-12-06 |
Family
ID=11814670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992012771U Expired - Fee Related JP2601713Y2 (en) | 1992-03-13 | 1992-03-13 | Lighting equipment |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0560327B1 (en) |
| JP (1) | JP2601713Y2 (en) |
| AU (1) | AU662803B2 (en) |
| CA (1) | CA2092600C (en) |
| DE (1) | DE69301473T2 (en) |
| HK (1) | HK1007185A1 (en) |
| NZ (1) | NZ247086A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6454433B1 (en) | 2001-05-24 | 2002-09-24 | Eveready Battery Company, Inc. | Dual faceted reflector |
| US7828456B2 (en) | 2007-10-17 | 2010-11-09 | Lsi Industries, Inc. | Roadway luminaire and methods of use |
| US8794787B2 (en) | 2009-11-10 | 2014-08-05 | Lsi Industries, Inc. | Modular light reflectors and assemblies for luminaire |
| US8042968B2 (en) | 2009-11-10 | 2011-10-25 | Lsi Industries, Inc. | Modular light reflectors and assemblies for luminaire |
| DE202016101305U1 (en) | 2016-03-09 | 2016-05-06 | Zweibrüder Optoelectronics Gmbh & Co. Kg | reflector system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2629046A (en) * | 1951-01-03 | 1953-02-17 | Liberman Milton | Lamp supported reflector unit |
| DE1497305A1 (en) * | 1966-04-29 | 1969-08-07 | Interelectric Ag | Electric lamp with parabolic reflector |
| US3443086A (en) * | 1967-05-16 | 1969-05-06 | Giannini Scient Corp | Beam-forming system |
| IT1083262B (en) * | 1977-05-10 | 1985-05-21 | Fiat Spa | REFLECTOR FOR LIGHTING AND OR SIGNALING DEVICE PARTICULARLY FOR VEHICLES |
| GB2079435B (en) * | 1980-07-03 | 1984-05-23 | Gen Electric | Reflector lamp |
-
1992
- 1992-03-13 JP JP1992012771U patent/JP2601713Y2/en not_active Expired - Fee Related
-
1993
- 1993-03-09 NZ NZ24708693A patent/NZ247086A/en unknown
- 1993-03-10 AU AU35108/93A patent/AU662803B2/en not_active Ceased
- 1993-03-10 EP EP19930103850 patent/EP0560327B1/en not_active Expired - Lifetime
- 1993-03-10 DE DE1993601473 patent/DE69301473T2/en not_active Expired - Fee Related
- 1993-03-12 CA CA 2092600 patent/CA2092600C/en not_active Expired - Fee Related
-
1998
- 1998-06-24 HK HK98106412A patent/HK1007185A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| HK1007185A1 (en) | 1999-04-01 |
| EP0560327B1 (en) | 1996-02-07 |
| AU3510893A (en) | 1993-09-16 |
| AU662803B2 (en) | 1995-09-14 |
| NZ247086A (en) | 1995-12-21 |
| CA2092600C (en) | 1996-10-15 |
| EP0560327A2 (en) | 1993-09-15 |
| CA2092600A1 (en) | 1993-09-14 |
| DE69301473D1 (en) | 1996-03-21 |
| JPH0575901U (en) | 1993-10-15 |
| DE69301473T2 (en) | 1996-08-14 |
| EP0560327A3 (en) | 1993-09-29 |
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