Speed regulating mechanism for timepiece movement, timepiece movement and timepiece

By adopting a simplified actuation system in the speed control mechanism of mechanical clocks and adjusting the stiffness of the hairspring with an actuator, the problems of hairspring stress and timing error in the prior art are solved, and higher timing accuracy and manufacturing simplicity are achieved.

CN222914050UActive Publication Date: 2025-05-27ETA SA MFG HORLOGERE SUISSE
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Patent Information

Application Number
CN202421693496.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Priority Date
2023-07-24
Filing Date
2024-07-17
Publication Date
2025-05-27
Estimated Expiration
2034-07-17

AI Technical Summary

Technical Problem

When adjusting the time difference of existing mechanical watches, the speed control mechanism of existing mechanical clocks can easily lead to increased stress and timing errors in the hairspring, and it is difficult to accurately control the clearance of the hairspring at the fast and slow needle keys, affecting the timing characteristics.

Method used

A simplified actuation system is adopted to adjust the stiffness of the hairspring by an actuator mechanically connected to the hairspring, thereby adjusting the time difference of the speed control mechanism. The actuator includes a hook to engage the hairspring, and the stiffness of the hairspring is changed by the displacement of the actuator.

Benefits of technology

This allows for no need to use two outer piles to hang the hairspring, simplifying the actuation system, reducing manufacturing complexity, and allowing independent adjustment of the traveling difference and slanting, improving timing accuracy.

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Abstract

The utility model relates to a speed regulating mechanism (1) for a clock movement, which comprises an inertial mass body such as a balance wheel (23), a hairspring (25) comprising a strip (2) wound for multiple circles, and an actuating system used for regulating the travel time difference of the speed regulating mechanism (1), the actuating system comprises an actuator (30) mechanically connected to the hairspring (25), the travel time difference of the speed regulating mechanism can be changed by the displacement of the actuator, the actuator (30) comprises a hook (39) engaged with the hairspring (25), and the stiffness of the hairspring (25) can be changed by the displacement of the actuator (30). The utility model also relates to a clock movement comprising the speed regulating mechanism and a clock comprising the clock movement.
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