EP0560327A2 - Lampe de poche comportant deux miroirs pour une seule source de lumière - Google Patents

Lampe de poche comportant deux miroirs pour une seule source de lumière Download PDF

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Publication number
EP0560327A2
EP0560327A2 EP93103850A EP93103850A EP0560327A2 EP 0560327 A2 EP0560327 A2 EP 0560327A2 EP 93103850 A EP93103850 A EP 93103850A EP 93103850 A EP93103850 A EP 93103850A EP 0560327 A2 EP0560327 A2 EP 0560327A2
Authority
EP
European Patent Office
Prior art keywords
reflecting mirror
light source
reflecting
filament
lighting apparatus
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.)
Granted
Application number
EP93103850A
Other languages
German (de)
English (en)
Other versions
EP0560327B1 (fr
EP0560327A3 (fr
Inventor
Masao Shoji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CatEye Co Ltd
Original Assignee
CatEye Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CatEye Co Ltd filed Critical CatEye Co Ltd
Publication of EP0560327A2 publication Critical patent/EP0560327A2/fr
Publication of EP0560327A3 publication Critical patent/EP0560327A3/fr
Application granted granted Critical
Publication of EP0560327B1 publication Critical patent/EP0560327B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the present invention relates to lighting apparatus, and particularly to a lighting apparatus such as a flashlight including a light source and reflecting mirrors.
  • Fig. 3 is a cross sectional view showing a structure of a conventional flashlight.
  • a conventional flashlight includes a body A 13 protecting a battery housing portion 15, a battery cover 17 covering a battery housed in housing portion 15, and a body B 21 protecting a lamp bulb 7.
  • body B 21 a reflecting mirror 1 is attached around lamp bulb 7 for reflecting forward emitted light from lamp bulb 7, and a lens 19 for expanding the irradiation range is attached in front of lamp bulb 7.
  • Fig. 4 is an enlarged cross sectional view showing a structure of and around the lamp bulb and reflecting mirror of the flashlight in Fig. 3.
  • a line passing through the center of lamp bulb 7 is indicated as an X-Y axis and the position of a filament 9 of lamp bulb 7 is indicated as an origin O.
  • the front end of reflecting mirror 1 is indicated as C, and the rear end is indicated as D. Since the structure is symmetric with respect to X-Y axis, only the upper half will hereinafter be described.
  • an angle COY is 37.5°
  • an angle DOY is 92.4°.
  • Luminous flux of filament 9 emitted in the range of the angle COY is directed forward without reflected by reflecting mirror 1.
  • Luminous flux of filament 9 emitted in the range of the angle DOC is reflected by reflecting mirror 1 to be made parallel to the axis OY and directed forward.
  • Fig. 5 shows an example in which backward luminous flux should be utilized for forward irradiation.
  • the angle COY is 37.5°, which is the same as in Fig. 4, while the angle DOY is 125.0°, which is larger than the corresponding angle in Fig. 4.
  • reflecting mirror 1 must be made larger compared to Fig. 4, as can be seen from Fig. 5 (compare the dimensions L in the figures).
  • FIG. 6 is a cross sectional view of a flashlight with the reflecting mirror of Fig. 5 incorporated therein.
  • the structure around a lamp bulb is considerably larger compared to that in Fig. 3, which can not be lead to a compact lighting apparatus with a high utilization efficiency of luminous flux.
  • One object of the present invention is to increase a utilization efficiency of luminous flux in a lighting apparatus.
  • Another object of the present invention is to make a lighting apparatus compact while maintaining a utilization efficiency of luminous flux.
  • the lighting apparatus in accordance with the present invention includes a light source with a solid angle over 6.28 steradians defined by its irradiation range, a first reflecting mirror for reflecting light emitted from the light source to direct the reflected light forward, and a second reflecting mirror provided at least at the back of the light source, for reflecting the emitted light from the light source to direct the reflected light toward the light source.
  • the lighting apparatus configured as described above, light emitted backward from the light source is reflected by the second reflecting mirror to be directed toward the light source, so that the utilization efficiency of luminous flux can be enhanced while the apparatus being made compact.
  • Fig. 1 is a cross sectional view showing a structure of a flashlight according to one embodiment of the present invention.
  • Fig. 2 is an enlarged cross sectional view showing a structure around a lamp bulb of Fig. 1.
  • Fig. 3 is a cross sectional view showing a structure of a conventional flashlight.
  • Fig. 4 is an enlarged cross sectional view showing a structure around a lamp bulb of Fig. 3.
  • Fig. 5 is an enlarged cross sectional view showing another example of a structure around a lamp bulb of a conventional flashlight.
  • Fig. 6 is a cross sectional view showing a structure of another conventional flashlight with the structure around the lamp bulb of Fig. 5 incorporated thereinto.
  • Fig. 1 is a cross sectional view showing a structure of a flashlight according to one embodiment of the present invention
  • Fig. 2 is an enlarged cross sectional view of a structure around a lamp bulb and a reflecting mirror of Fig. 1.
  • a reflecting mirror 1 is provided approximately in front of the position of a filament 9 of a lamp bulb 7, and a reflex reflecting portion 5 is provided between reflecting mirror 1 and a socket 11 in which lamp bulb 7 is inserted and fixed thereto.
  • reflecting mirror 1 to which a fitting piece 3 is connected are basically the same as those of reflecting mirror 1 shown in Fig. 4. Specifically, an angle COY is 37.5°, and an angle DOY is 92.4°. Luminous flux emitted from filament 9 in the range of the angle COY is directed forward as it is, while luminous flux emitted from filament 9 in the range of the angle DOC is reflected by reflecting mirror 1 to be made parallel to an axis OY and directed forward.
  • Reflex reflecting portion 5 is a reflector of transparent resin and the like, molded so as to have a plurality of rectangular projections formed on the sphere centered on a filament 9 as shown in the figure. For example, light directed from filament 9 to an A point of reflex reflecting portion 5 is reflected by an inner surface of the rectangular protruding portion, to be made parallel to OA and directed toward filament 9. The light passing near filament 9 is then incident to a B point on the lower surface of reflecting mirror 1 and reflected to be made approximately parallel to the axis OY and directed forward.
  • reflex reflecting portion 5 enables light emitted backward from filament 9 to be utilized as light to be directed forward.
  • a reflex reflecting portion having a plurality of rectangular steps is provided, while instead, a reflecting element, such as a spherical mirror, may be provided for reflecting back light from filament 9.
  • a reflecting element such as a spherical mirror

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
EP19930103850 1992-03-13 1993-03-10 Lampe de poche comportant deux miroirs pour une seule source de lumière Expired - Lifetime EP0560327B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1992012771U JP2601713Y2 (ja) 1992-03-13 1992-03-13 照明装置
JP12771/92 1992-03-13

Publications (3)

Publication Number Publication Date
EP0560327A2 true EP0560327A2 (fr) 1993-09-15
EP0560327A3 EP0560327A3 (fr) 1993-09-29
EP0560327B1 EP0560327B1 (fr) 1996-02-07

Family

ID=11814670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930103850 Expired - Lifetime EP0560327B1 (fr) 1992-03-13 1993-03-10 Lampe de poche comportant deux miroirs pour une seule source de lumière

Country Status (7)

Country Link
EP (1) EP0560327B1 (fr)
JP (1) JP2601713Y2 (fr)
AU (1) AU662803B2 (fr)
CA (1) CA2092600C (fr)
DE (1) DE69301473T2 (fr)
HK (1) HK1007185A1 (fr)
NZ (1) NZ247086A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
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
US8042968B2 (en) 2009-11-10 2011-10-25 Lsi Industries, Inc. Modular light reflectors and assemblies for luminaire
US8794787B2 (en) 2009-11-10 2014-08-05 Lsi Industries, Inc. Modular light reflectors and assemblies for luminaire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016101305U1 (de) 2016-03-09 2016-05-06 Zweibrüder Optoelectronics Gmbh & Co. Kg Reflektorsystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3443086A (en) * 1967-05-16 1969-05-06 Giannini Scient Corp Beam-forming system
DE1497305A1 (de) * 1966-04-29 1969-08-07 Interelectric Ag Elektrische Leuchte mit Parabol-Reflektor
FR2390673A1 (fr) * 1977-05-10 1978-12-08 Fiat Spa Reflecteur et lampe pour vehicule
GB2079435A (en) * 1980-07-03 1982-01-20 Gen Electric Reflector lamp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2629046A (en) * 1951-01-03 1953-02-17 Liberman Milton Lamp supported reflector unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1497305A1 (de) * 1966-04-29 1969-08-07 Interelectric Ag Elektrische Leuchte mit Parabol-Reflektor
US3443086A (en) * 1967-05-16 1969-05-06 Giannini Scient Corp Beam-forming system
FR2390673A1 (fr) * 1977-05-10 1978-12-08 Fiat Spa Reflecteur et lampe pour vehicule
GB2079435A (en) * 1980-07-03 1982-01-20 Gen Electric Reflector lamp

Cited By (9)

* Cited by examiner, † Cited by third party
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
US8002428B2 (en) 2007-10-17 2011-08-23 Lsi Industries, Inc. Luminaire and methods of use
US8177386B2 (en) 2007-10-17 2012-05-15 Lsi Industries, Inc. Luminaire and methods of use
US8434893B2 (en) 2007-10-17 2013-05-07 Lsi Industries, Inc. Luminaire and methods of use
US8567983B2 (en) 2007-10-17 2013-10-29 Lsi Industries, Inc. Roadway luminaire and methods of use
US9194550B2 (en) 2007-10-17 2015-11-24 Lsi Industries, Inc. Roadway luminaire and methods of use
US8042968B2 (en) 2009-11-10 2011-10-25 Lsi Industries, Inc. Modular light reflectors and assemblies for luminaire
US8794787B2 (en) 2009-11-10 2014-08-05 Lsi Industries, Inc. Modular light reflectors and assemblies for luminaire

Also Published As

Publication number Publication date
JP2601713Y2 (ja) 1999-12-06
HK1007185A1 (en) 1999-04-01
EP0560327B1 (fr) 1996-02-07
AU3510893A (en) 1993-09-16
AU662803B2 (en) 1995-09-14
NZ247086A (en) 1995-12-21
CA2092600C (fr) 1996-10-15
CA2092600A1 (fr) 1993-09-14
DE69301473D1 (de) 1996-03-21
JPH0575901U (ja) 1993-10-15
DE69301473T2 (de) 1996-08-14
EP0560327A3 (fr) 1993-09-29

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