Arbour of a mobile with optimised geometry in magnetic environment

摘要

The shaft (1) has a projecting unit (11) of a larger radius (RMAX), where the projecting unit is arranged around a fulcrum pin (D). The projecting unit is delimited on both sides of the fulcrum pin by two surfaces (14, 15). The two surfaces define a profile (12) provided in a rectangle (R) with a projection that is provided on a level perpendicular to that of the fulcrum pin. A ratio of longitudinal length (LR) to width (LA) of the rectangle is higher than 2, where a longitudinal direction of the rectangle defines a main axis (DP). Independent claims are also included for the following: (1) a pivoting arbor (2) a clock movement mechanism (3) a clock element.