JPS55159421A - Electromagnetically driven shutter - Google Patents

Electromagnetically driven shutter

Info

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
Application number
JP6338579A
Other languages
Japanese (ja)
Inventor
Takashi Uchiyama
Tetsuya Taguchi
Mitsutoshi Ogiso
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 JP6338579A priority Critical patent/JPS55159421A/en
Publication of JPS55159421A publication Critical patent/JPS55159421A/en
Pending legal-status Critical Current

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
JP6338579A 1979-05-23 1979-05-23 Electromagnetically driven shutter Pending JPS55159421A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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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