JPS5518634A - Driving circuit of electric shutter using permanent magnet - Google Patents

Driving circuit of electric shutter using permanent magnet

Info

Publication number
JPS5518634A
JPS5518634A JP9155078A JP9155078A JPS5518634A JP S5518634 A JPS5518634 A JP S5518634A JP 9155078 A JP9155078 A JP 9155078A JP 9155078 A JP9155078 A JP 9155078A JP S5518634 A JPS5518634 A JP S5518634A
Authority
JP
Japan
Prior art keywords
shutter
permanent magnet
iron piece
goes
coil
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
JP9155078A
Other languages
Japanese (ja)
Other versions
JPS6210416B2 (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 Copal 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 JP9155078A priority Critical patent/JPS5518634A/en
Publication of JPS5518634A publication Critical patent/JPS5518634A/en
Publication of JPS6210416B2 publication Critical patent/JPS6210416B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the racing of shutter second time by flowing the current of the exent of negating the attraction force of a permanent magnet to a coil to put its iron piece in a stable position at the shutter setting then breaking the current supply to let the iron piece be completely attracted.
CONSTITUTION: When open shutter charge is accomplished, a switch S1 goes ON. When a set lever 1 turns ON a switch S3 at the shutter release, a transistor T1 goes ON and at the same time a transistor T2 also goes ON and the specified voltage is applied to a coil L by a constant voltage diode ZD, whereby the attraction force of a permanent magnet 4 is negated. Hence, an iron piece 3 is pressure contacted to an iron core 5 in a stable state. Next, when the set lever 1 returns to turn OFF the switch S3, the voltage of the coil L becomes zero and the iron piece 3 is perfectly attracted, whereby the occurrence of racing of the shutter second time may be prevented.
COPYRIGHT: (C)1980,JPO&Japio
JP9155078A 1978-07-28 1978-07-28 Driving circuit of electric shutter using permanent magnet Granted JPS5518634A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9155078A JPS5518634A (en) 1978-07-28 1978-07-28 Driving circuit of electric shutter using permanent magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9155078A JPS5518634A (en) 1978-07-28 1978-07-28 Driving circuit of electric shutter using permanent magnet

Publications (2)

Publication Number Publication Date
JPS5518634A true JPS5518634A (en) 1980-02-08
JPS6210416B2 JPS6210416B2 (en) 1987-03-06

Family

ID=14029594

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9155078A Granted JPS5518634A (en) 1978-07-28 1978-07-28 Driving circuit of electric shutter using permanent magnet

Country Status (1)

Country Link
JP (1) JPS5518634A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605848A1 (en) * 1986-02-22 1987-08-27 Standard Elektrik Lorenz Ag Thermoplastic polymer mixture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3605848A1 (en) * 1986-02-22 1987-08-27 Standard Elektrik Lorenz Ag Thermoplastic polymer mixture

Also Published As

Publication number Publication date
JPS6210416B2 (en) 1987-03-06

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