MECHANISM FOR DRIVING THE HANDS OF AN ELECTROMECHANICAL WATCH, PROVIDED WITH A LOCKING DEVICE

MECHANISM FOR DRIVING THE HANDS OF AN ELECTROMECHANICAL WATCH, PROVIDED WITH A LOCKING DEVICE

The mechanism (1) drives the hands (8, 9) of an electromechanical watch. It includes an electric motor (2), a set of gear wheels (3, 4, 5, 6, 7) connected to the electric motor to move the hands forward or backward on each actuation of the electric motor, and a locking device (20). The locking devic...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: LAGORGETTE PASCAL, BERTHOUD JOERG
Format: Patent
Sprache:eng
Schlagworte:
ELECTROMECHANICAL CLOCKS OR WATCHES
HOROLOGY
PHYSICS
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Beschreibung
Zusammenfassung:The mechanism (1) drives the hands (8, 9) of an electromechanical watch. It includes an electric motor (2), a set of gear wheels (3, 4, 5, 6, 7) connected to the electric motor to move the hands forward or backward on each actuation of the electric motor, and a locking device (20). The locking device (20) includes a piezoelectric actuator (21) for locking, in a rest mode, directly or via a bolt (22), one wheel of the set between each actuation of the electric motor. The piezoelectric actuator (21) releases the wheel of the set of gear wheels (3, 4, 5, 6, 7), when it is actuated by an electrical signal at the moment of each actuation of the electric motor (2) to move the hands forward or backward.