JPS56109323A - Electromagnetically driven shutter - Google Patents

Electromagnetically driven shutter

Info

Publication number
JPS56109323A
JPS56109323A JP1133880A JP1133880A JPS56109323A JP S56109323 A JPS56109323 A JP S56109323A JP 1133880 A JP1133880 A JP 1133880A JP 1133880 A JP1133880 A JP 1133880A JP S56109323 A JPS56109323 A JP S56109323A
Authority
JP
Japan
Prior art keywords
auxiliary spring
lever
attitude
camera
weight
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
JP1133880A
Other languages
Japanese (ja)
Inventor
Nobuaki Date
Fumio Shimada
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
Canon Electronics Inc
Original Assignee
Canon Inc
Canon Electronics 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, Canon Electronics Inc filed Critical Canon Inc
Priority to JP1133880A priority Critical patent/JPS56109323A/en
Publication of JPS56109323A publication Critical patent/JPS56109323A/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
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
    • G03B9/18—More than two members

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)

Abstract

PURPOSE:To make effective correction with simple structure by varying the assistant force of an auxiliary spring so as to correct automatically variation in shutter speed by the weight of a shutter blind due to a change in photographic attitude of a camera. CONSTITUTION:At one end of attitude difference detection lever 11 rotatable on the rotating shaft of auxiliary spring lever 9, weight 11a is fixed, and between this attitude detection lever 11 and auxiliary spring lever 9, auxiliary spring 10 is extended. As the camera is held at the lateral position as shown in the figure, attitude detection lever 11 swivels to the position of stopper 13 by the gravity of weight 11a. Consequently, the activating force of auxiliary spring 10 to auxiliary spring lever 9 increases as compared with the camera at the normal position, and consequently releasing the shutter in this state runs the blinds with the composite force of the driving force of the coil of an electromagnetic source and that of auxiliary spring 9.
JP1133880A 1980-02-01 1980-02-01 Electromagnetically driven shutter Pending JPS56109323A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1133880A JPS56109323A (en) 1980-02-01 1980-02-01 Electromagnetically driven shutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1133880A JPS56109323A (en) 1980-02-01 1980-02-01 Electromagnetically driven shutter

Publications (1)

Publication Number Publication Date
JPS56109323A true JPS56109323A (en) 1981-08-29

Family

ID=11775240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1133880A Pending JPS56109323A (en) 1980-02-01 1980-02-01 Electromagnetically driven shutter

Country Status (1)

Country Link
JP (1) JPS56109323A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8807853B2 (en) 2011-12-20 2014-08-19 Seiko Precision Inc. Focal plane shutter and optical apparatus provided with same
US20150116485A1 (en) * 2012-07-04 2015-04-30 Hemang Subramanian Device to shade persons from bright sunshine, dynamically from large height by matching shade pattern to presence
WO2018230172A1 (en) * 2017-06-14 2018-12-20 ソニー株式会社 Imaging device, shutter driving method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8807853B2 (en) 2011-12-20 2014-08-19 Seiko Precision Inc. Focal plane shutter and optical apparatus provided with same
US20150116485A1 (en) * 2012-07-04 2015-04-30 Hemang Subramanian Device to shade persons from bright sunshine, dynamically from large height by matching shade pattern to presence
WO2018230172A1 (en) * 2017-06-14 2018-12-20 ソニー株式会社 Imaging device, shutter driving method
JPWO2018230172A1 (en) * 2017-06-14 2020-04-16 ソニー株式会社 Imaging device and shutter driving method
US11480851B2 (en) 2017-06-14 2022-10-25 Sony Corporation Imaging apparatus and shutter driving method

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