- 专利标题: FOCAL PLANE SHUTTER
-
申请号: US12549734申请日: 2009-08-28
-
公开(公告)号: US20090317072A1公开(公告)日: 2009-12-24
- 发明人: Hiroshi TAKAHASHI , Chiaki Nemoto
- 申请人: Hiroshi TAKAHASHI , Chiaki Nemoto
- 申请人地址: JP Narashino-shi
- 专利权人: SEIKO PRECISION INC.
- 当前专利权人: SEIKO PRECISION INC.
- 当前专利权人地址: JP Narashino-shi
- 优先权: JP2007-293758 20071112
- 主分类号: G03B17/38
- IPC分类号: G03B17/38
摘要:
A focal plane shutter includes: a shutter substrate having an opening; a blade for opening and closing the opening; a drive member swingably supported for driving the blade; a drive spring for driving the drive member; and an adjustment mechanism for adjusting an urging force of the drive spring. One end of the drive spring is engaged with the drive member. The adjustment mechanism includes: an adjustment member engaging the other end of the drive spring and rotatably supported to adjust the urging force of the drive spring; and an engagement member abutting the adjustment member to stop rotation of the adjustment member. The adjustment member has a clearance portion for avoiding abutment against the engagement member at a given rotational position.
公开/授权文献
- US07896561B2 Focal plane shutter 公开/授权日:2011-03-01