| 摘要 |
PROBLEM TO BE SOLVED: To reduce the thickness and size of a box and cost for maintenance by sharing parts. SOLUTION: A first stepping motor 21 driving the second hand has a first stator 21a and a first rotor 21c rotated in a specified direction according to the magnetic field given by the first stator 21a. A second stepping motor 31 driving the minute hand and the hour hand has a second stator 31a and a second rotor 31c rotated in a specified direction according to the magnetic field given by the second stator 31a. The first stator 21a and the second stator 21c are arranged on the middle plane positioning nearly in the middle in the box perpendicular to the direction of the rotation shaft of the hand, and the first rotor 21c and the second rotor 31c are rotated conversely to each other.
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