JPS5522746A - Malfunction warning device of electric shutter utilizing electromagnetic device combining permanent magnet - Google Patents

Malfunction warning device of electric shutter utilizing electromagnetic device combining permanent magnet

Info

Publication number
JPS5522746A
JPS5522746A JP9563278A JP9563278A JPS5522746A JP S5522746 A JPS5522746 A JP S5522746A JP 9563278 A JP9563278 A JP 9563278A JP 9563278 A JP9563278 A JP 9563278A JP S5522746 A JPS5522746 A JP S5522746A
Authority
JP
Japan
Prior art keywords
electromotive force
iron core
held
permanent magnet
lever
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
JP9563278A
Other languages
Japanese (ja)
Other versions
JPS6158013B2 (en
Inventor
Yasuo Ishiguro
Osamu Oba
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.)
Nidec Precision Corp
Original Assignee
Nidec Copal Corp
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 Nidec Copal Corp filed Critical Nidec Copal Corp
Priority to JP9563278A priority Critical patent/JPS5522746A/en
Publication of JPS5522746A publication Critical patent/JPS5522746A/en
Publication of JPS6158013B2 publication Critical patent/JPS6158013B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)
  • Shutters For Cameras (AREA)
  • Shutter-Related Mechanisms (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)

Abstract

PURPOSE: To enable photographing to be adequately accomplished by discriminating the attraction and detaching of the iron piece lever of the electromagnetic deveice from the presence or not of its electromotive force generation and warning the detaching state of the iron piece lever.
CONSTITUTION: When a shutter button is pushed, a switch S1 is changed over to the terminal b through moving up of a mirror and the coil L1 for opening release is supplied with current. If at this time an iron core lever 3 is held attracted to an iron core 1, electromotive force is generated when i detaches but when the lever3 is held detached, no electromotive force is generatd. Hence, this is discriminated with a comparator COM1 and the outpt of FF2 is made to the signal level corresponding to either state. The similar operations also take place with the coil for closing and when at least one of the iron core levers is held detached, a transistor T3 conducts through a NAND gate NAND2 and buffer B, causing an LED to emit light and give warning. In this way, photographing may be accomplished adequately.
COPYRIGHT: (C)1980,JPO&Japio
JP9563278A 1978-08-05 1978-08-05 Malfunction warning device of electric shutter utilizing electromagnetic device combining permanent magnet Granted JPS5522746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9563278A JPS5522746A (en) 1978-08-05 1978-08-05 Malfunction warning device of electric shutter utilizing electromagnetic device combining permanent magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9563278A JPS5522746A (en) 1978-08-05 1978-08-05 Malfunction warning device of electric shutter utilizing electromagnetic device combining permanent magnet

Publications (2)

Publication Number Publication Date
JPS5522746A true JPS5522746A (en) 1980-02-18
JPS6158013B2 JPS6158013B2 (en) 1986-12-09

Family

ID=14142889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9563278A Granted JPS5522746A (en) 1978-08-05 1978-08-05 Malfunction warning device of electric shutter utilizing electromagnetic device combining permanent magnet

Country Status (1)

Country Link
JP (1) JPS5522746A (en)

Also Published As

Publication number Publication date
JPS6158013B2 (en) 1986-12-09

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