Multifunction timepiece having fan shape moving hand train wheel and fan shape moving hand train wheel apparatus
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United States of America Patent
Stats
-
Sep 11, 2007
Grant Date -
Jun 15, 2006
app pub date -
Dec 8, 2005
filing date -
Dec 15, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
To realize a small-sized analog multifunction timepiece by adopting a fan shape moving hand mechanism which does not use a hairspring. A multifunction timepiece of the invention is provided with a day display mechanism for operating a small hand moving in a fan shape. The day display mechanism is provided with a day indicator driving wheel, a day jumper, a small day wheel for displaying calendar information, a hammer constituted to rotate based on rotation of a day indicator transmission wheel, and a day return spring for exerting a rotational force to the small day wheel. By bringing a cam contact portion of the hammer to a transmission cam outer periphery portion and exerting an elastic force to a return cam outer shape portion by a return spring portion of the day return spring, the small day wheel is constituted to be exerted with a rotational force in a constant direction.
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Family
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Cited Art Landscape
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