Actuation mechanism for variable focus spectacles
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United States of America Patent
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-
Mar 7, 2006
Grant Date -
N/A
app pub date -
Nov 20, 2004
filing date -
Nov 20, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An actuating mechanism for spectacles which include two variable focus lens units. The mechanism mounts on the spectacle bridge; and includes two elongated drive levers mounted near opposite ends of the bridge, each extending toward the other end of the bridge. The free end of each driving lever is connected to its corresponding lens unit through a linkage. The driving levers are caused to rotate simultaneously, but in opposite directions, by a cam that is driven by a sliding member that slides along the bridge. By positioning the sliding member as desired, the spectacles wearer causes the cam to rotate, thereby causing the driving levers to rotate, and both lens units to change focal length.
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