Title:
FOCAL PLANE SHUTTER
Document Type and Number:
Japanese Patent JP2021184064
Kind Code:
A
Abstract:
To increase the degree of freedom in design of a prevention mechanism to improve durability.SOLUTION: A focal plane shutter comprises: a second rear driving member 620B that is connected with a rear blade and is pushed by a first rear driving member 620A to rotate, thereby causing the rear blade to run; and a prevention mechanism 91 that can make a transition between a prevention state for preventing a bound of the second rear driving member 620B at the completion of exposure running and a retracted state for not preventing the bound. In a charge operation, after a rear charge member 855 starts to rotate the first rear driving member 620A to a charge position, a front charge member 82 makes the prevention mechanism 91 to transition to the retracted state, and an urging force of an urging spring 54 urging in the direction of the first rear driving member 620A moves the second rear driving member 620B.SELECTED DRAWING: Figure 18
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Inventors:
SAITO YUKI
KAWAKUBO NAOKI
ITO HISAAKI
KAWAKUBO NAOKI
ITO HISAAKI
Application Number:
JP2020089882A
Publication Date:
December 02, 2021
Filing Date:
May 22, 2020
Export Citation:
Assignee:
CANON DENSHI KK
International Classes:
G03B9/36