Invention Grant
- Patent Title: Focal-plane shutter and image pickup apparatus
- Patent Title (中): 焦平面快门和图像拾取装置
-
Application No.: US12557429Application Date: 2009-09-10
-
Publication No.: US08011838B2Publication Date: 2011-09-06
- Inventor: Masanori Sakai
- Applicant: Masanori Sakai
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Cowan, Liebowitz & Latman, P.C.
- Priority: JP2008-236625 20080916
- Main IPC: G03B9/40
- IPC: G03B9/40

Abstract:
A focal-plane shutter 105 includes a leading blade driving member 4 rotatably fitted onto a first shaft 1d and driven by a biasing force of a leading blade driving spring 8, a trailing blade driving member 5 rotatably fitted onto a second shaft 1e and driven by a biasing force of a trailing blade driving spring 9, a leading blade adjusting member 6 rotatably fitted onto the first shaft 1d and adjusting the biasing force of the leading blade driving spring 8, a trailing blade adjusting member 7 rotatably fitted onto the second shaft 1e and adjusting the biasing force of the trailing blade driving spring 9, and an upper base plate 3 including a first surface 3a and a second surface 3b that are thrust position limiters. An area of the first surface 3a is larger than that of the second surface 3b.
Public/Granted literature
- US20100067897A1 FOCAL-PLANE SHUTTER AND IMAGE PICKUP APPARATUS Public/Granted day:2010-03-18
Information query