Helical spring, torque generating device, movement for timepiece, and timepiece

The present invention provides a helical spring capable of suppressing self-contact or contact with surrounding members and generating a desired torque, a torque generating device, a movement for a timepiece, and a timepiece. A constant-force spring (100) is a spiral spring for a timepiece, which is...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	FUJIEDA HISASHI, ITOU KENGO, KAWAUCHIYA TAKUMA, MORI YUICHI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	HOROLOGY MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL MECHANICALLY-DRIVEN CLOCKS OR WATCHES PHYSICS TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
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