JPS5793330A - Electromagnetic driving device of program electromagnetic shutter - Google Patents
Electromagnetic driving device of program electromagnetic shutterInfo
- Publication number
- JPS5793330A JPS5793330A JP17062380A JP17062380A JPS5793330A JP S5793330 A JPS5793330 A JP S5793330A JP 17062380 A JP17062380 A JP 17062380A JP 17062380 A JP17062380 A JP 17062380A JP S5793330 A JPS5793330 A JP S5793330A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- optical path
- photographing optical
- electromagnetic
- magnet
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
- G03B9/24—Adjusting size of aperture formed by members when fully open so as to constitute a virtual diaphragm that is adjustable
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Shutters For Cameras (AREA)
Abstract
PURPOSE:To obtain a small-sized device which is capable of generating a sufficient rotary torque, by providing a hexagonal coil which is turned by magnetic force of a square magnet, on said magnet which has been partially so cut as not to exert influence on a photographing optical path of a photographing lens optical system. CONSTITUTION:A permanent magnet 1 has 4 blocks whose adjacent blocks have each different polarity, and also, notch parts 1a, 1b are provided on the side opposed to a photographing optical path 16 of this permanent magnet 1, and the side of its other end so as not to exert influence on the photographing optical path 16. A coil 2 is formed by winding a conductor around the outside circumference of a core 3 in the shape of a hexagon, and this coil 2 has a long side and a short side, and is related as shown by the expressionI. The coil 2 is turned within the range where its sections AF, CD do not project to the outside from the end parts of the permanent magnets 1a, 1b, in the start moving position or the end moving position, so as not to exert influence on the photographing optical path 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17062380A JPS5793330A (en) | 1980-12-02 | 1980-12-02 | Electromagnetic driving device of program electromagnetic shutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17062380A JPS5793330A (en) | 1980-12-02 | 1980-12-02 | Electromagnetic driving device of program electromagnetic shutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5793330A true JPS5793330A (en) | 1982-06-10 |
Family
ID=15908300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17062380A Pending JPS5793330A (en) | 1980-12-02 | 1980-12-02 | Electromagnetic driving device of program electromagnetic shutter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5793330A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6019131A (en) * | 1983-06-22 | 1985-01-31 | ポラロイド・コ−ポレ−シヨン | Electromagnetic actuator for generating force vector equal in magnitude and opposite in direction |
| US4782353A (en) * | 1984-02-27 | 1988-11-01 | Seikosha Co., Ltd. | Stepping motor-driven sector opening/closing device |
-
1980
- 1980-12-02 JP JP17062380A patent/JPS5793330A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6019131A (en) * | 1983-06-22 | 1985-01-31 | ポラロイド・コ−ポレ−シヨン | Electromagnetic actuator for generating force vector equal in magnitude and opposite in direction |
| US4782353A (en) * | 1984-02-27 | 1988-11-01 | Seikosha Co., Ltd. | Stepping motor-driven sector opening/closing device |
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