JPS57205726A - Mirror driving circuit - Google Patents

Mirror driving circuit

Info

Publication number
JPS57205726A
JPS57205726A JP9176481A JP9176481A JPS57205726A JP S57205726 A JPS57205726 A JP S57205726A JP 9176481 A JP9176481 A JP 9176481A JP 9176481 A JP9176481 A JP 9176481A JP S57205726 A JPS57205726 A JP S57205726A
Authority
JP
Japan
Prior art keywords
mirror
photographing
coil
downward
release operation
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
JP9176481A
Other languages
Japanese (ja)
Other versions
JPH029331B2 (en
Inventor
Yasuo Ishiguro
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.)
Nidec Copal Corp
Original Assignee
Nidec Copal Corp
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 Nidec Copal Corp filed Critical Nidec Copal Corp
Priority to JP9176481A priority Critical patent/JPS57205726A/en
Publication of JPS57205726A publication Critical patent/JPS57205726A/en
Publication of JPH029331B2 publication Critical patent/JPH029331B2/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
    • G03B19/00—Cameras
    • G03B19/02—Still-picture cameras
    • G03B19/12—Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror

Abstract

PURPOSE:To permit always normal photographing by supplying electricity intermittently to a motor so as to move a mirror downward in an initial period of release operation when the mirror is up before, for example, photographing. CONSTITUTION:Now, if electricity is supplied to respective parts by release operation while a mirror 2 is up prior to photographing, emitter-collector current flows largely to a phototransistor 11. As a result, transistors T5 and T2 go on, and current flow intermittently to a coil Lm 17, then the coil 16 wound with the coil 17 moves rightward on an iron core 15. This forces the 1st crank lever 4 and the 2nd crank lever 6 to oscillates. When a fulcrum shaft 2b is located to the right side beyond the neutral part with respect to the line connecting shafts 5 and 3 during the oscillating process of the levers 4, 6, a toggle spring 7 acts as the force for moving the mirror 2 downward. Since the mirror operating mechanism is moved downward by this, the always normal photographing is made possible.
JP9176481A 1981-06-15 1981-06-15 Mirror driving circuit Granted JPS57205726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9176481A JPS57205726A (en) 1981-06-15 1981-06-15 Mirror driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9176481A JPS57205726A (en) 1981-06-15 1981-06-15 Mirror driving circuit

Publications (2)

Publication Number Publication Date
JPS57205726A true JPS57205726A (en) 1982-12-16
JPH029331B2 JPH029331B2 (en) 1990-03-01

Family

ID=14035616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9176481A Granted JPS57205726A (en) 1981-06-15 1981-06-15 Mirror driving circuit

Country Status (1)

Country Link
JP (1) JPS57205726A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006030498A (en) * 2004-07-15 2006-02-02 Sigma Corp Quick return mechanism for single-lens reflex camera

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4720852B2 (en) * 2008-05-14 2011-07-13 ソニー株式会社 Mirror drive device and imaging device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006030498A (en) * 2004-07-15 2006-02-02 Sigma Corp Quick return mechanism for single-lens reflex camera
JP4643191B2 (en) * 2004-07-15 2011-03-02 株式会社シグマ Quick return mechanism for single-lens reflex cameras

Also Published As

Publication number Publication date
JPH029331B2 (en) 1990-03-01

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