JPS57154225A - Camera - Google Patents

Camera

Info

Publication number
JPS57154225A
JPS57154225A JP56162365A JP16236581A JPS57154225A JP S57154225 A JPS57154225 A JP S57154225A JP 56162365 A JP56162365 A JP 56162365A JP 16236581 A JP16236581 A JP 16236581A JP S57154225 A JPS57154225 A JP S57154225A
Authority
JP
Japan
Prior art keywords
magnetic flux
magnetic
armature
permanent magnet
yoke
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
JP56162365A
Other languages
Japanese (ja)
Inventor
Masayoshi Yamamichi
Yukio Iura
Hiroshi Aizawa
Tadashi Ito
Tetsuya Taguchi
Masanori Uchitoi
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 JP56162365A priority Critical patent/JPS57154225A/en
Publication of JPS57154225A publication Critical patent/JPS57154225A/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)
  • Exposure Control For Cameras (AREA)
  • Cameras In General (AREA)
  • Shutter-Related Mechanisms (AREA)

Abstract

PURPOSE:To easily simplify a controlling circuit, by using an electromagnet provided with an electromagnetic element for generating a magnetic flux in the direction opposed to a magnetic flux provided to a magnetic circuit by a permanent magnet, for at least one of 2 magnetic circuits. CONSTITUTION:In a pair of magnetic paths placing a permanent magnet between them, energizing coils 5, 6 are placed, respectively, and in case when an energizing current does not flow to the energizing coils 5, 6, an armature 1 is adsorbed to one end of a yoke 2 against the force of a spring 3 by a magnetic flux from the permanent magnet. When magnetomotive force is provided in the reverse direction against the magnetic flux by the permanent magnet by feeding to the energizing coils 5, 6, the armature 1 is released from th yoke 2 by force of the spring 3. That is to say, when the magnetic flux by the energizing coils 5, 6 attains to a prescribed value, the armature 1 is released, but when a bypass magnetic path is provided on the yoke 2, the armature 1 can be released by small magnetomotive force.
JP56162365A 1981-10-12 1981-10-12 Camera Pending JPS57154225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56162365A JPS57154225A (en) 1981-10-12 1981-10-12 Camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56162365A JPS57154225A (en) 1981-10-12 1981-10-12 Camera

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP49014360A Division JPS50109723A (en) 1974-02-04 1974-02-04

Publications (1)

Publication Number Publication Date
JPS57154225A true JPS57154225A (en) 1982-09-24

Family

ID=15753174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56162365A Pending JPS57154225A (en) 1981-10-12 1981-10-12 Camera

Country Status (1)

Country Link
JP (1) JPS57154225A (en)

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