Focal plane shutter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 15, 1992
Grant Date -
N/A
app pub date -
Jun 28, 1991
filing date -
Jun 30, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A focal plane shutter includes a reversing lever mounted on a shaft disposed on a driving lever for opening and closing a blade group constituting the focal plane shutter so that a relative rotation range of the reversing lever with respect to the driving lever is restricted. Energizing means for energizing the driving lever toward the end of forward movement is directly engaged with the reversing lever. Further, a cam follower is disposed on the reversing lever between the shaft mounting the reversing lever and the engagement point of the reversing lever with the energizing means. Energizing force acting on the reversing lever is transmitted to the driving lever through the reversing lever to move the driving lever toward the end of forward movement. Motion of the cam follower is restrained by a cam profile while the driving lever is moved toward the end of forward movement, so that the energizing force acting on the reversing lever is reversed at the cam follower serving as a fulcrum and is transmitted to the driving lever as braking force. Accordingly, shock and oscillation at the end of forward movement are reduced.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully