Regulator system for mechanical watch

Abstract

The present invention relates to regulator organs for a mechanical timepiece, specifically a system based on the magnetic interaction between a resonator, for example in the form of a tuning fork, and an escapement wheel. The system is characterised in that there are several magnetic interaction zones (25) and (26) between the resonator (14) and the escapement wheel (9) that are arranged such that the torques produced at the escapement wheel by those interactions compensate each other if the escapement wheel is not synchronised with the frequency of the resonator. This results in a negligible torque on the escapement wheel when the latter rotates slowly in the direction of the arrow (24) or in the opposite direction. This makes it possible to start the timepiece at a low torque of the barrel spring and without a launch procedure or device and allows better resistance of the timepiece to withstand a loss of synchronisation in case of impact.

Description

technical field [0001] The invention relates to a regulating system for a mechanical timepiece. "Adjustment system" or "adjustment part" refers to two distinct devices: the resonator and the escapement. Background technique [0002] A resonator is a component that produces the periodic motion that forms the time base of a timepiece. Well known resonators are the pendulum oscillating under the action of gravity, the balance wheel which, together with the associated balance spring, forms a mechanical oscillator resonating around the balance axis, and the tuning fork, which oscillates by elastic deformation of their structure. The best known embodiment of a tuning fork is a tuning fork used in music, however, the most widely manufactured tuning fork is a resonator made from a quartz crystal and used as a time base for electronic watches. [0003] The escapement is the connecting element between the watch's gear train and the resonator. The escapement has two functions: first...

AI Technical Summary

Problems solved by technology

[0010] However, the device according to European Patent Application No. EP2466401A1 has a number of disadvantages resulting from the fact that the tuning fork interacts with the escape wheel to generate a tangential force that varies greatly when the escape wheel is advanced by one tooth

However, in the case of a wrist watch in particular, and given the high accelerations it has to withstand, this solution is not possible: either the tuning fork mounting part is actually small enough not to disturb the vibrations of the resonator, in which case the The device is not shock resistant, or the device is shock resistant, in which case the mounted parts are too bulky and cause significant energy losses

Clearly, it is not possible to mount the U-shaped tuning fork in a timepiece movement in such a way as to meet the conditions required for this application

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