JPS56111843A - Electromagnetic drive shutter - Google Patents

Electromagnetic drive shutter

Info

Publication number
JPS56111843A
JPS56111843A JP1508980A JP1508980A JPS56111843A JP S56111843 A JPS56111843 A JP S56111843A JP 1508980 A JP1508980 A JP 1508980A JP 1508980 A JP1508980 A JP 1508980A JP S56111843 A JPS56111843 A JP S56111843A
Authority
JP
Japan
Prior art keywords
coil
pattern
shutter
electromagnetic
bounding
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
Application number
JP1508980A
Other languages
Japanese (ja)
Other versions
JPS6239404B2 (en
Inventor
Michiro Hirohata
Nobuo Tezuka
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 JP1508980A priority Critical patent/JPS56111843A/en
Priority to DE19813104001 priority patent/DE3104001A1/en
Priority to US06/232,851 priority patent/US4348092A/en
Publication of JPS56111843A publication Critical patent/JPS56111843A/en
Publication of JPS6239404B2 publication Critical patent/JPS6239404B2/ja
Granted 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
    • G03B9/18—More than two members
    • G03B9/22—More than two members each moving in one direction to open and then in opposite direction to close, e.g. iris type

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 from bounding by controlling driving force applied in the open position direction of the shutter blade united with a fan-shaped pattern coil by selecting the shape and arrangement of permanent magnet pieces for electromagnetic drive. CONSTITUTION:When an electric current flows to driving coil 5 in a fan-shaped pattern through shutter release operation, sector ring 6 united with coil 5 rotates counterclockwise. Then, rectangular permanent magnets 4 arranged, with long sides crossing, along the effective side line of the pattern of coil 5 increases gradually the pattern of coil 5 in a magnetic field. Then, the pattern of coil 5 is put off the magnetic fields of magnets 4 and as shutter blades 10 and 11 are open more and more, the electromagnetic driving force increases gradually. After the intermediate opening, it decreases gradually and when they are opened completely, the electromagnetic force nearly balances with the retaining strength by spring 7 and ring 6 stops its rotation smoothly by stopper 8, so that the shutter will be prevented from bounding.
JP1508980A 1980-02-08 1980-02-08 Electromagnetic drive shutter Granted JPS56111843A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1508980A JPS56111843A (en) 1980-02-08 1980-02-08 Electromagnetic drive shutter
DE19813104001 DE3104001A1 (en) 1980-02-08 1981-02-05 Electromagnetically driven shutter
US06/232,851 US4348092A (en) 1980-02-08 1981-02-09 Electromagnetically driven shutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1508980A JPS56111843A (en) 1980-02-08 1980-02-08 Electromagnetic drive shutter

Publications (2)

Publication Number Publication Date
JPS56111843A true JPS56111843A (en) 1981-09-03
JPS6239404B2 JPS6239404B2 (en) 1987-08-22

Family

ID=11879109

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1508980A Granted JPS56111843A (en) 1980-02-08 1980-02-08 Electromagnetic drive shutter

Country Status (1)

Country Link
JP (1) JPS56111843A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58501931A (en) * 1981-11-12 1983-11-10 レスニコ−，ハ−バ−ト control electric drive
JPS61169477U (en) * 1985-04-04 1986-10-21
JP2006221045A (en) * 2005-02-14 2006-08-24 Nikon Corp Shake correction device and optical device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130838U (en) * 1973-03-07 1974-11-11
JPS5374028A (en) * 1976-11-04 1978-07-01 Olympus Optical Co Ltd Diaphragm device for camera
JPS5495233U (en) * 1977-12-17 1979-07-05

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130838U (en) * 1973-03-07 1974-11-11
JPS5374028A (en) * 1976-11-04 1978-07-01 Olympus Optical Co Ltd Diaphragm device for camera
JPS5495233U (en) * 1977-12-17 1979-07-05

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58501931A (en) * 1981-11-12 1983-11-10 レスニコ−，ハ−バ−ト control electric drive
JPS61169477U (en) * 1985-04-04 1986-10-21
JP2006221045A (en) * 2005-02-14 2006-08-24 Nikon Corp Shake correction device and optical device
JP4692004B2 (en) * 2005-02-14 2011-06-01 株式会社ニコン Blur correction device and optical apparatus

Also Published As

Publication number Publication date
JPS6239404B2 (en) 1987-08-22

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