JPS57125928A - Electromagnetic shutter - Google Patents

Electromagnetic shutter

Info

Publication number
JPS57125928A
JPS57125928A JP1182681A JP1182681A JPS57125928A JP S57125928 A JPS57125928 A JP S57125928A JP 1182681 A JP1182681 A JP 1182681A JP 1182681 A JP1182681 A JP 1182681A JP S57125928 A JPS57125928 A JP S57125928A
Authority
JP
Japan
Prior art keywords
space
blades
shutter
sector
sector ring
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
JP1182681A
Other languages
Japanese (ja)
Inventor
Michiro Hirohata
Hideo Igari
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 JP1182681A priority Critical patent/JPS57125928A/en
Publication of JPS57125928A publication Critical patent/JPS57125928A/en
Pending legal-status Critical Current

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
    • G03B9/16—Two separate members moving in the same direction

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)

Abstract

PURPOSE:To provide an electromagnetic shutter of small thickness by disposing permanent magnets which act magnetic fluxes to a sector ring and shutter blades serving also as apertures within the same space. CONSTITUTION:Four pieces of permanent magnets 1 are disposed in the space formed of a front plate 8 and a rear plate 9, whereby a magnetic circuit is constituted. In this space, sector ring 2 having a printed coil and shutter blades 5, 6 serving also as apertures are provided freely turnably via the bearing part 7a and blade shaft 7b of a holder 7 in this space. When the printed coil is energized with such constitution, the sector ring 2 turns counterclockwise against a return spring 3, and the blades 5, 6 are turned by a sector pin 4, by which a photographing optical path 10 is opened. This path is closed when the coil is de-energized. Thereby, the magnets 1 and the blades 5, 6 are disposed in the same space and the thickness is reduced.
JP1182681A 1981-01-29 1981-01-29 Electromagnetic shutter Pending JPS57125928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1182681A JPS57125928A (en) 1981-01-29 1981-01-29 Electromagnetic shutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1182681A JPS57125928A (en) 1981-01-29 1981-01-29 Electromagnetic shutter

Publications (1)

Publication Number Publication Date
JPS57125928A true JPS57125928A (en) 1982-08-05

Family

ID=11788565

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1182681A Pending JPS57125928A (en) 1981-01-29 1981-01-29 Electromagnetic shutter

Country Status (1)

Country Link
JP (1) JPS57125928A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504132A (en) * 1983-02-02 1985-03-12 Eastman Kodak Company Multifunction electromagnetic actuator and camera control apparatus emloying same
JPS6440826U (en) * 1987-09-04 1989-03-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504132A (en) * 1983-02-02 1985-03-12 Eastman Kodak Company Multifunction electromagnetic actuator and camera control apparatus emloying same
JPS6440826U (en) * 1987-09-04 1989-03-10

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