| 摘要 |
#CMT# #/CMT# The return spring has a hairspring (7) whose inner coil is connected to a hub (7.1). The hub is pivoted on a mechanical element e.g. plate (1) or large date lever, coaxial to a movable unit e.g. sensor (4) and small ratchet, where the movable unit includes a pin (4.3) cooperating with the hub. An end of an outer coil of the hairspring has a fixation unit (7.3) cooperating with a top pin (5.1) of another movable unit e.g. jumper (5) or large ratchet, where the latter movable unit is pivoted on the mechanical element along an axis parallel to a pivoting axis of the hub. #CMT#USE : #/CMT# Return spring for acting on movable units e.g. jumper, small ratchet, large ratchet, and sensor, in a mechanism i.e. date mechanism, of a movement of a timepiece (all claimed). #CMT#ADVANTAGE : #/CMT# The return spring can differently act on two movable mechanical units having different functions and different return characteristics, thus reducing the number of mechanical pieces in the timepiece mechanism by reducing the number of return springs in the mechanism. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a top view of a return spring acting on a sensor cooperating with a cam and a jumper cooperating with a toothed wheel. 1 : Plate 4 : Sensor 4.3 : Pin 5 : Jumper 5.1 : Top pin 7 : Hairspring 7.1 : Hub 7.3 : Fixation unit. |
