When the impacting object is impacted, an electromotive force is generated by the vibrating of the piezoelectric element.

当冲击的对象被冲击时，电动力通过振动压电元素引起。

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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.

冲击检出电路(104)的冲击检出电阻(141、143)，检测出受到冲击后产生的步进电机(105)的反电动势。

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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.

冲击检出电路(104)的冲击检出电阻(141、143)，检测出受到冲击后产生的步进电机(105)的反电动势。

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