JPS57200022A - Electromagnetically driven shutter - Google Patents

Electromagnetically driven shutter

Info

Publication number
JPS57200022A
JPS57200022A JP8542281A JP8542281A JPS57200022A JP S57200022 A JPS57200022 A JP S57200022A JP 8542281 A JP8542281 A JP 8542281A JP 8542281 A JP8542281 A JP 8542281A JP S57200022 A JPS57200022 A JP S57200022A
Authority
JP
Japan
Prior art keywords
lever
photographic lens
shutter blades
setting plate
driving force
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
JP8542281A
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 JP8542281A priority Critical patent/JPS57200022A/en
Priority to US06/381,785 priority patent/US4452521A/en
Priority to DE19823220266 priority patent/DE3220266A1/en
Publication of JPS57200022A publication Critical patent/JPS57200022A/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)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)

Abstract

PURPOSE:To prevent aperture characteristics of shutter blades from varying owing to variation in coil resistance value, by controlling the releasing the shutter blades by electromagnetic driving force and spring force. CONSTITUTION:When a release button is pressed, distance is detected and then a control circuit flows a curreint from the inside terminal of a coil 1 to the outside terminal. Electromagnetic driving force is generated and a rotor 2 while energizing a spring 3 rotates clockwise to make a driving pin 2b press the operating part 11d of a securing lever 11. Therefore, a projecting part 11c is positioned in the operation area of a transfer lever 17.A photographic lens 25 is moves in along the cam 22d of a setting plate 22. When the photographic lens 25 is moved by the movement of the setting plate 22 until a position which corresponds to the subject distance, the securing lever 11 is rotated clockwise to disengage the transer lever 11 from the projecting part 11c.
JP8542281A 1981-06-02 1981-06-02 Electromagnetically driven shutter Pending JPS57200022A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP8542281A JPS57200022A (en) 1981-06-02 1981-06-02 Electromagnetically driven shutter
US06/381,785 US4452521A (en) 1981-06-02 1982-05-25 Camera having an electromagnetically driven shutter
DE19823220266 DE3220266A1 (en) 1981-06-02 1982-05-28 CAMERA WITH ELECTRO-MAGNETIC OPERATED LOCK

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8542281A JPS57200022A (en) 1981-06-02 1981-06-02 Electromagnetically driven shutter

Publications (1)

Publication Number Publication Date
JPS57200022A true JPS57200022A (en) 1982-12-08

Family

ID=13858377

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8542281A Pending JPS57200022A (en) 1981-06-02 1981-06-02 Electromagnetically driven shutter

Country Status (1)

Country Link
JP (1) JPS57200022A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62151525U (en) * 1986-03-18 1987-09-25
JPH0283532U (en) * 1988-12-14 1990-06-28

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62151525U (en) * 1986-03-18 1987-09-25
JPH0283532U (en) * 1988-12-14 1990-06-28

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