Invention Grant
- Patent Title: Focal plane shutter, imaging device and digital camera
- Patent Title (中): 焦平面快门,成像装置和数码相机
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Application No.: US14325716Application Date: 2014-07-08
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Publication No.: US09395598B2Publication Date: 2016-07-19
- Inventor: Hiroshi Takahashi , Minori Murata , Seiichi Oishi , Mitsuru Suzuki
- Applicant: SEIKO PRECISION INC.
- Applicant Address: JP Narashino-shi
- Assignee: SEIKO PRECISION INC.
- Current Assignee: SEIKO PRECISION INC.
- Current Assignee Address: JP Narashino-shi
- Agency: Kratz, Quintos & Hanson, LLP
- Priority: JP2012-136062 20120615
- Main IPC: H04N5/235
- IPC: H04N5/235 ; G03B9/10 ; G03B9/14 ; G03B9/36 ; H04N5/238

Abstract:
A focal plane shutter includes: a board including an opening; a leading shutter and a trailing shutter opening and closing the opening; first and second biasing members respectively biasing the leading shutter and the trailing shutter to move away from the opening; a first actuator causing the leading shutter to move from a position to close the opening to a position to recede from the opening while the leading shutter is assisted by a biasing force of the first biasing member in an exposure operation; and a second actuator causing the trailing shutter to move from a position to recede from the opening to a position to close the opening against a biasing force of the second biasing member in the exposure operation, wherein drive torque of the first actuator is smaller than that of the second actuator.
Public/Granted literature
- US20140320737A1 FOCAL PLANE SHUTTER, IMAGING DEVICE AND DIGITAL CAMERA Public/Granted day:2014-10-30
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