JPS5522748A - Safety device of camera with electric shutter utilizing electromagnetic device combining permanent magnet - Google Patents

Safety device of camera with electric shutter utilizing electromagnetic device combining permanent magnet

Info

Publication number
JPS5522748A
JPS5522748A JP9563478A JP9563478A JPS5522748A JP S5522748 A JPS5522748 A JP S5522748A JP 9563478 A JP9563478 A JP 9563478A JP 9563478 A JP9563478 A JP 9563478A JP S5522748 A JPS5522748 A JP S5522748A
Authority
JP
Japan
Prior art keywords
shutter
capacitor
iron core
electromotive force
release
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
JP9563478A
Other languages
Japanese (ja)
Other versions
JPS6158014B2 (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 JP9563478A priority Critical patent/JPS5522748A/en
Publication of JPS5522748A publication Critical patent/JPS5522748A/en
Publication of JPS6158014B2 publication Critical patent/JPS6158014B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To achieve the prevention of exposure to other film frame by forcefully performing closing release by the electromotive force generated when opening release is done with the iron core lever of the electromagnetic device being held detached.
CONSTITUTION: A capacitor C2 is held charged up to the voltage of supply battery E0 at all times and therefore if it is assumed that the iron core lever on the opening control side of the shutter detaches from the iron core after setting of the shutter and before its release operation, then electromotive force is instantaneously generated in its coil L0. This electromotive force pulse causes a transistor T3 to be amplified by way of a resistance R3 and capacitor C3, whereby an SCR is triggered. As a result, transistors T5, T6 are conducted by the charged charge of the capacitor C2 and current flows instantaneously in the coil Lc which then causes the closing release of the shutter to be accomplished and the shutter to be closed. In this way, the adverse influence of exposure to other film frame may be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP9563478A 1978-08-05 1978-08-05 Safety device of camera with electric shutter utilizing electromagnetic device combining permanent magnet Granted JPS5522748A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9563478A JPS5522748A (en) 1978-08-05 1978-08-05 Safety device of camera with electric shutter utilizing electromagnetic device combining permanent magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9563478A JPS5522748A (en) 1978-08-05 1978-08-05 Safety device of camera with electric shutter utilizing electromagnetic device combining permanent magnet

Publications (2)

Publication Number Publication Date
JPS5522748A true JPS5522748A (en) 1980-02-18
JPS6158014B2 JPS6158014B2 (en) 1986-12-09

Family

ID=14142939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9563478A Granted JPS5522748A (en) 1978-08-05 1978-08-05 Safety device of camera with electric shutter utilizing electromagnetic device combining permanent magnet

Country Status (1)

Country Link
JP (1) JPS5522748A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0628207B1 (en) * 1985-06-04 1994-04-13 Mitsubishi Materiaru Kk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0628207B1 (en) * 1985-06-04 1994-04-13 Mitsubishi Materiaru Kk

Also Published As

Publication number Publication date
JPS6158014B2 (en) 1986-12-09

Similar Documents

Publication Publication Date Title
JPS5522748A (en) Safety device of camera with electric shutter utilizing electromagnetic device combining permanent magnet
JPS5528087A (en) Automatic feeder of film
JPS5220828A (en) Automatic exposure control camera of both priority type which can be p rovided with electric motor drive device
JPS55166633A (en) Electric shutter circuit
JPS5451234A (en) Electric door apparatus
JPS5766427A (en) Exposure control circuit of camera
JPS5518635A (en) Driving circuit of electric shutter using permanent magnet
JPS51151538A (en) Safety mechanism for the electric shutter of the camera
JPS552268A (en) Driving circuit of electromagnetically driven shutter
JPS55565A (en) Driving circuit of electromagnetic shutter
JPS569731A (en) Movable flash device built-in camera
JPS56164331A (en) Motor driving device
JPS56153328A (en) Shutter release locking device
JPS5553319A (en) Malfunction preventing device of camera
DE2640412C2 (en) Photographic camera with electrical timing
JPS56122017A (en) Shutter device
JPS5650318A (en) Single-lens reflex camera having electromagnetic driving source
JPS55108638A (en) Multiple exposure device of electromagnetically driven shutter camera
JPS52123234A (en) Electromagnetic shutter mechanism for camera
JPS54153473A (en) Controller for lifting magnet apparatus
JPS5522746A (en) Malfunction warning device of electric shutter utilizing electromagnetic device combining permanent magnet
JPS57168241A (en) Battery checking device of camera
JPS57111520A (en) Power supply release device for camera
JPS5933028U (en) Shutter mechanism for camera
JPS5466832A (en) Release control for camera with motor winder