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US07701807B2 Analog electronic timepiece that prevents deviation of displayed time when an impact is applied to the timepiece 有权
模拟电子表能够防止当对钟表施加冲击时的显示时间偏差

Analog electronic timepiece that prevents deviation of displayed time when an impact is applied to the timepiece
Abstract:
Impact detecting resistors (141), (143) of an impact detecting circuit (104) detect a counter electromotive force of a step motor (105) generated due to an impact. This counter electromotive force is amplified applying a predetermined period and a predetermined chopper-width by a chopper-amplifying waveform shaping circuit (118). Therefore, even a light impact can be detected. Inverters (145), (146) compare these impact detecting signals (S22), (S23) with a threshold value and detect an impact when the signals exceeds the threshold value. A controlling circuit (102) provides a lock pulse to the step motor (105) through signal lines (AA), (BB) when an impact is detected, brakes rotation of a rotor (162) thereby preventing a deviation of the time displayed with a second hand (106).
Abstract(Chinese):

冲击检测电路（104）的冲击检测电阻（141），（143）检测由于冲击产生的步进马达（105）的反电动势。 该反电动势通过斩波放大波形整形电路（118）被施加预定周期和预定的斩波宽度。 因此，即使是轻微的碰撞也能够被检测出来。 逆变器（145），（146）将这些冲击检测信号（S22），（S23）与阈值进行比较，并且当信号超过阈值时检测冲击。 控制电路（102）当检测到冲击时通过信号线（AA），（BB）向步进电动机（105）提供锁定脉冲，制动转子（162）的旋转，从而防止与 二手（106）。

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