Curtain blind power conversion device with reverse brake effect
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United States of America Patent
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-
Oct 16, 2007
Grant Date -
Apr 6, 2006
app pub date -
Sep 30, 2004
filing date -
Sep 30, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A curtain blind power conversion device with reverse brake effect, wherein the power conversion device particularly provides the brake effect and power conversion during course of manipulating slats of the curtain blind. The power conversion device is structured to include a first annular gear and a second annular gear, the two annular gears having different circular pitch and coaxially configured face to face. The first annular gear is fixedly configured, whereas the second annular gear passively rotates, and the two annular gears synchronously engage with a single planetary gear set. Utilization is made of the unequal circular pitch of the two annular gears to produce an angular speed difference, where upon the second annular gear being subject to an external force feedback, the reverse brake effect is thereby assuredly achieved.
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