JPS55159421A - Electromagnetically driven shutter - Google Patents
Electromagnetically driven shutterInfo
- Publication number
- JPS55159421A JPS55159421A JP6338579A JP6338579A JPS55159421A JP S55159421 A JPS55159421 A JP S55159421A JP 6338579 A JP6338579 A JP 6338579A JP 6338579 A JP6338579 A JP 6338579A JP S55159421 A JPS55159421 A JP S55159421A
- Authority
- JP
- Japan
- Prior art keywords
- blades
- shutter
- ring
- magnets
- electromagnetically
- 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)
- Exposure Control For Cameras (AREA)
Abstract
PURPOSE: To enable sure shutter operation with small electric power by detaining shutter blades by electromagnetic force by way of the position at the ending of the opening and closing operations of the permanent magnets which open and close the shutter blades and magnetic materials.
CONSTITUTION: According to the magnetization of the iron cores of the electromagnets 2 by energizing of coils L..., the permanent magnet 1... turnable about axes (1a) are turned electromagnetically, causing a connecting ring 3 to be turned up to the position determined by the stoppers Pc, Po. The shutter blades 9... connecting to the ring 3 are then fully closed or fully opened. The current supply to the coils L... is cut off by way of the contacts S4, S5 connecting to the ring 3 in the full open and full close positions of these blades 9... and the magnets 1 are attracted to the magnetic material iron core of the magnets 2 to electromagnetically detain the blades 9..., thus even in the case of a long exposure time, the sure shutter operation is accomplished by medium electric power through cutting off of the current supply.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6338579A JPS55159421A (en) | 1979-05-23 | 1979-05-23 | Electromagnetically driven shutter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6338579A JPS55159421A (en) | 1979-05-23 | 1979-05-23 | Electromagnetically driven shutter |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51004195 Division |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55159421A true JPS55159421A (en) | 1980-12-11 |
Family
ID=13227768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6338579A Pending JPS55159421A (en) | 1979-05-23 | 1979-05-23 | Electromagnetically driven shutter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55159421A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60159701A (en) * | 1984-01-30 | 1985-08-21 | Minolta Camera Co Ltd | Device for tuning photographing lens of autofocusing camera |
JPS60140934U (en) * | 1984-02-27 | 1985-09-18 | 株式会社精工舎 | Step motor driven sector opening/closing device |
JPS6148819A (en) * | 1984-08-16 | 1986-03-10 | Seiko Koki Kk | Control circuit of program shutter |
JPH03500933A (en) * | 1988-04-21 | 1991-02-28 | イーストマン・コダック・カンパニー | Electromagnetic shutter device |
EP1892567A1 (en) * | 2006-08-23 | 2008-02-27 | Samsung Electronics Co., Ltd. | Iris unit, and image projecting apparatus and display apparatus having the same |
-
1979
- 1979-05-23 JP JP6338579A patent/JPS55159421A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60159701A (en) * | 1984-01-30 | 1985-08-21 | Minolta Camera Co Ltd | Device for tuning photographing lens of autofocusing camera |
JPS60140934U (en) * | 1984-02-27 | 1985-09-18 | 株式会社精工舎 | Step motor driven sector opening/closing device |
JPH0447697Y2 (en) * | 1984-02-27 | 1992-11-11 | ||
JPS6148819A (en) * | 1984-08-16 | 1986-03-10 | Seiko Koki Kk | Control circuit of program shutter |
JPH03500933A (en) * | 1988-04-21 | 1991-02-28 | イーストマン・コダック・カンパニー | Electromagnetic shutter device |
EP1892567A1 (en) * | 2006-08-23 | 2008-02-27 | Samsung Electronics Co., Ltd. | Iris unit, and image projecting apparatus and display apparatus having the same |
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