JPS552268A - Driving circuit of electromagnetically driven shutter - Google Patents
Driving circuit of electromagnetically driven shutterInfo
- 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
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
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)
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 |
-
1978
- 1978-06-21 JP JP7513878A patent/JPS552268A/en active Pending
Cited By (4)
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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