JPS5518634A - Driving circuit of electric shutter using permanent magnet - Google Patents
Driving circuit of electric shutter using permanent magnetInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3605848A1 (en) * | 1986-02-22 | 1987-08-27 | Standard Elektrik Lorenz Ag | Thermoplastic polymer mixture |
-
1978
- 1978-07-28 JP JP9155078A patent/JPS5518634A/en active Granted
Cited By (1)
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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