Including Gear Means Patents (Class 396/477)
  • Patent number: 8459882
    Abstract: A camera shutter is provided that includes a first drive member operating an opening blade; a first hook holding the first drive member in a charged position; a closing member operating a closing blade; a second drive member displacing the closing blade to position closing the shutter opening by operating the closing member; a second hook holding the second drive member in a charged position, and a magnet controlling operative timings between the first and second hooks. In operation, the magnet displaces the second hook from a rest position to a charged position and releases the first drive member from the first hook, thereby moving the opening blade. After a predetermined time, the magnet releases the hooking between the second hook and the second driving member such that the closing member is operated by the second driving member, thereby moving the closing blade to the position closing the shutter opening.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: June 11, 2013
    Assignee: Mamiya Digital Imaging Co., Ltd
    Inventor: Shogo Kato