JPS5756829A - Electric shutter camera - Google Patents

Electric shutter camera

Info

Publication number
JPS5756829A
JPS5756829A JP11886881A JP11886881A JPS5756829A JP S5756829 A JPS5756829 A JP S5756829A JP 11886881 A JP11886881 A JP 11886881A JP 11886881 A JP11886881 A JP 11886881A JP S5756829 A JPS5756829 A JP S5756829A
Authority
JP
Japan
Prior art keywords
output
circuit
conduct
switch
flash device
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
JP11886881A
Other languages
Japanese (ja)
Inventor
Nobuyuki Taniguchi
Masashio Kitaura
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP11886881A priority Critical patent/JPS5756829A/en
Publication of JPS5756829A publication Critical patent/JPS5756829A/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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/70—Exposure-making shutters; Diaphragms with flash-synchronising contacts

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutter-Related Mechanisms (AREA)

Abstract

PURPOSE:To eliminate malfunction such as vignetting, no light emission, etc., by triggering a flash trigger device of a shutter consisting of front and rear curtains, by a logical circuit for making it conduct only when the aperture is fully opened. CONSTITUTION:Trigger terminals J3, J4 of a flash device F are connected to terminals J1, J2 of a camera side. Only when an output of an NOR circuit 2 is in a high level, an SCR (SR) conducts, and the flash device is triggered. At the time of release, transistors Q1, Q2 conduct and a switch SX is opened, therefore, an input to the NOR circuit is in high and low levels, accordingly, its output is in a low level. When the front curtain running is completed, a switch SR is closed, the NOR output is reversed, and the flash device is triggered. When an exposure controlling circuit 1 turns off the transistors Q1, Q2, the NOR output becomes a low level. Accordingly, unless the aperture is fully opened, the SCR does not conduct, and one mechanical switch is enough, therefore, malfunction scarcely occurs.
JP11886881A 1981-07-28 1981-07-28 Electric shutter camera Pending JPS5756829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11886881A JPS5756829A (en) 1981-07-28 1981-07-28 Electric shutter camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11886881A JPS5756829A (en) 1981-07-28 1981-07-28 Electric shutter camera

Publications (1)

Publication Number Publication Date
JPS5756829A true JPS5756829A (en) 1982-04-05

Family

ID=14747104

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11886881A Pending JPS5756829A (en) 1981-07-28 1981-07-28 Electric shutter camera

Country Status (1)

Country Link
JP (1) JPS5756829A (en)

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