JPS57173825A - Flash emitting device provided with automatic operation stopping means - Google Patents

Flash emitting device provided with automatic operation stopping means

Info

Publication number
JPS57173825A
JPS57173825A JP56058525A JP5852581A JPS57173825A JP S57173825 A JPS57173825 A JP S57173825A JP 56058525 A JP56058525 A JP 56058525A JP 5852581 A JP5852581 A JP 5852581A JP S57173825 A JPS57173825 A JP S57173825A
Authority
JP
Japan
Prior art keywords
oscillating
emitting device
capacitor
turned
stopping means
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.)
Pending
Application number
JP56058525A
Other languages
Japanese (ja)
Inventor
Minoru Tanio
Takashi Mizushima
Hidetoshi Kawasaki
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.)
SUN PACK KK
Sun Pack Co Ltd
Sunpak KK
Original Assignee
SUN PACK KK
Sun Pack Co Ltd
Sunpak KK
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 SUN PACK KK, Sun Pack Co Ltd, Sunpak KK filed Critical SUN PACK KK
Priority to JP56058525A priority Critical patent/JPS57173825A/en
Publication of JPS57173825A publication Critical patent/JPS57173825A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Inverter Devices (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To reduce power consumption in case of stopping an oscillating operation, by adding a control transistor which turns on and off together with an oscillating transistor, to a flash emitting device provided with an automatic operation stopping means. CONSTITUTION:A control TR2 which turns on and off together with an oscillating transistor TR1 is provided. When a synchro-switch 6 is closed, a capacitor 9 and a capacitor 14 of a timing circuit are chrged, a TR16 is turned off, simultaneously a base current flows to the TRs 1, 2, and an oscillating operation is started. Also, in case when this device is not used for a long period of time, an output is provided from the timing circuit, the TR16 is turned on, and a TR8 is turned off. Accordingly, the capacitor 9 is charged, the TR2 cannot become on, and the oscillating operation is stopped automatically. In this way, when the oscillating operation is being stopped, there is no circuit which must be operated by an electric power supply 18, therefore, the power consumption is reduced.
JP56058525A 1981-04-20 1981-04-20 Flash emitting device provided with automatic operation stopping means Pending JPS57173825A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56058525A JPS57173825A (en) 1981-04-20 1981-04-20 Flash emitting device provided with automatic operation stopping means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56058525A JPS57173825A (en) 1981-04-20 1981-04-20 Flash emitting device provided with automatic operation stopping means

Publications (1)

Publication Number Publication Date
JPS57173825A true JPS57173825A (en) 1982-10-26

Family

ID=13086838

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56058525A Pending JPS57173825A (en) 1981-04-20 1981-04-20 Flash emitting device provided with automatic operation stopping means

Country Status (1)

Country Link
JP (1) JPS57173825A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6139496A (en) * 1984-07-31 1986-02-25 株式会社ニコン Electronic flashing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6139496A (en) * 1984-07-31 1986-02-25 株式会社ニコン Electronic flashing device

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