Balance spring mechanism, timepiece and manufacturing method of a balance spring mechanism

By introducing shock-resistant components into the balance wheel and hairspring mechanism, the problem of hairspring deformation under impact was solved, thus maintaining the speed regulation accuracy and the timekeeping accuracy of the watch.

CN116804843BActive Publication Date: 2026-06-19SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SEIKO EPSON CORP
Filing Date
2023-03-21
Publication Date
2026-06-19

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Abstract

Balance wheel and hairspring mechanism, clock, and method for manufacturing the balance wheel and hairspring mechanism. High precision can be maintained. The balance wheel and hairspring mechanism includes: a balance shaft (410) rotatably supported on a base plate; an inner stud (440) fixed to the balance shaft (410); a hairspring (70) fixed to the inner stud (440), having a Grossman curve disposed on the side of the inner stud (440) and an Archimedes curve connected to the Grossman curve; and a shock-resistant component (500) that at least suppresses displacement of the shape on the side of the inner stud (440) in the Grossman curve.
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