JPS552268A - Driving circuit of electromagnetically driven shutter - Google Patents

Driving circuit of electromagnetically driven shutter

Info

Publication number
JPS552268A
JPS552268A JP7513878A JP7513878A JPS552268A JP S552268 A JPS552268 A JP S552268A JP 7513878 A JP7513878 A JP 7513878A JP 7513878 A JP7513878 A JP 7513878A JP S552268 A JPS552268 A JP S552268A
Authority
JP
Japan
Prior art keywords
shutter
capacitor
closing
electromagnetically driven
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.)
Pending
Application number
JP7513878A
Other languages
Japanese (ja)
Inventor
Ryoichi Suzuki
Yukio Ogawa
Takashi Uchiyama
Takao Kinoshita
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP7513878A priority Critical patent/JPS552268A/en
Priority to US06/048,742 priority patent/US4264162A/en
Priority to DE19792924876 priority patent/DE2924876A1/en
Publication of JPS552268A publication Critical patent/JPS552268A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shutters For Cameras (AREA)

Abstract

PURPOSE: To let shutter closing characteristics become sharp, obtain highly accurate shutter speeds and reduce the power consumption of power source batteries by supplying the driving current at the shutter closing from the boosted and charged capacitor.
CONSTITUTION: When the main switch MSW of the camera is closed in an electromagnetically driven shutter device which is electromagnetically opened and closed by an electromagnetic driving device, a DC booster 55 operates and a capacitor 62 is subsequently charged by the output voltage thereof. When the shutter is released in this state, a switch SW 1 closes to start charging to a time-setting capacitor 45 and supply current to the coil 9 of a motor from a battery 40 through switching transistors TR 8 and TR 5, whereby shutter opening is accomplished. At the closing of the shutter, large current flows from the capacitor 62 to the coil 9 of the motor through switching transistors TR 6 and TR7, thus the shutter closes rapidly.
COPYRIGHT: (C)1980,JPO&Japio
JP7513878A 1978-06-21 1978-06-21 Driving circuit of electromagnetically driven shutter Pending JPS552268A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP7513878A JPS552268A (en) 1978-06-21 1978-06-21 Driving circuit of electromagnetically driven shutter
US06/048,742 US4264162A (en) 1978-06-21 1979-06-15 Drive system for electromagnetically driven shutter
DE19792924876 DE2924876A1 (en) 1978-06-21 1979-06-20 DRIVE SYSTEM FOR AN ELECTROMAGNETICALLY OPERATED LOCKING

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7513878A JPS552268A (en) 1978-06-21 1978-06-21 Driving circuit of electromagnetically driven shutter

Publications (1)

Publication Number Publication Date
JPS552268A true JPS552268A (en) 1980-01-09

Family

ID=13567525

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7513878A Pending JPS552268A (en) 1978-06-21 1978-06-21 Driving circuit of electromagnetically driven shutter

Country Status (1)

Country Link
JP (1) JPS552268A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56101131A (en) * 1980-01-17 1981-08-13 Copal Co Ltd Driving circuit of electromagnetic shutter for single-lens reflex camera
JPH0219121U (en) * 1988-07-26 1990-02-08
JPH0219119U (en) * 1988-07-22 1990-02-08
US5594520A (en) * 1995-02-21 1997-01-14 Photometrics, Ltd Low supply voltage shutter driver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56101131A (en) * 1980-01-17 1981-08-13 Copal Co Ltd Driving circuit of electromagnetic shutter for single-lens reflex camera
JPH0219119U (en) * 1988-07-22 1990-02-08
JPH0219121U (en) * 1988-07-26 1990-02-08
US5594520A (en) * 1995-02-21 1997-01-14 Photometrics, Ltd Low supply voltage shutter driver

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