Mechanical timepiece
A mechanical timepiece is provided with: a spring; a balance spring mechanism for driving power from the spring; an oscillation circuit that outputs a clock signal; a speed regulation unit provided with a permanent magnet and a coil, one of the permanent magnet and the coil being held by the balance...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | A mechanical timepiece is provided with: a spring; a balance spring mechanism for driving power from the spring; an oscillation circuit that outputs a clock signal; a speed regulation unit provided with a permanent magnet and a coil, one of the permanent magnet and the coil being held by the balance spring mechanism; an external magnetic field detection unit that detects an external magnetic field through the coil; a vibration detection unit that detects vibration of the balance spring mechanism and outputs a vibration detection signal; a speed regulation control unit that outputs a drive pulse in accordance with a result of comparing the clock signal and the vibration detection signal, and performs a process for regulating the speed of the balance spring mechanism by causing an electromagnetic force generated by outputting a current to the coil by the drive pulse to act on the permanent magnet; an electric power storage unit that stores electric power supplied to the speed regulation control unit; and the ge |
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