JPS57116326A - Electromagnetic driving shutter - Google Patents

Electromagnetic driving shutter

Info

Publication number
JPS57116326A
JPS57116326A JP358781A JP358781A JPS57116326A JP S57116326 A JPS57116326 A JP S57116326A JP 358781 A JP358781 A JP 358781A JP 358781 A JP358781 A JP 358781A JP S57116326 A JPS57116326 A JP S57116326A
Authority
JP
Japan
Prior art keywords
sector ring
opened
fully
shutter
shutter blade
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
JP358781A
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 JP358781A priority Critical patent/JPS57116326A/en
Publication of JPS57116326A publication Critical patent/JPS57116326A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

PURPOSE:To prevent a shutter blade and a rotor from bounding when an electromagnetic driving shutter is fully opened, by braking the rotor through the operation of the magnetic field of the electromagnetic driving shutter when the shutter blade is opened almost fully. CONSTITUTION:As a shutter blade 10 in a closed state is opened in accordance with the rotation of a sector ring 6 through release operation, a magnetic body 16 provided to the sector ring 6 is attracted by a permanent magnet 1. Then, the sector ring 6 rotates and, at the same time, moves down and its lower end surface comes into contact with the permanent magnet 1, so that the sector ring 6 rotates while decelerated with frictional force f2 near a fully-opened position. Further, when the sector ring 6 meets a stopper 8, it bounds and tends to move in the opposite direction, but the bound of the sector ring 6 converges rapidly through the operation of the frictional force f2. Thus, the bound of the shutter blade in the fully-opened state is prevented.
JP358781A 1981-01-13 1981-01-13 Electromagnetic driving shutter Pending JPS57116326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP358781A JPS57116326A (en) 1981-01-13 1981-01-13 Electromagnetic driving shutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP358781A JPS57116326A (en) 1981-01-13 1981-01-13 Electromagnetic driving shutter

Publications (1)

Publication Number Publication Date
JPS57116326A true JPS57116326A (en) 1982-07-20

Family

ID=11561584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP358781A Pending JPS57116326A (en) 1981-01-13 1981-01-13 Electromagnetic driving shutter

Country Status (1)

Country Link
JP (1) JPS57116326A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015060059A (en) * 2013-09-18 2015-03-30 オリンパスメディカルシステムズ株式会社 Optical unit
JP2016521961A (en) * 2013-06-11 2016-07-25 レイセオン カンパニー Vacuum stabilization mechanism drive arm

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016521961A (en) * 2013-06-11 2016-07-25 レイセオン カンパニー Vacuum stabilization mechanism drive arm
JP2015060059A (en) * 2013-09-18 2015-03-30 オリンパスメディカルシステムズ株式会社 Optical unit

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