| 摘要 |
PROBLEM TO BE SOLVED: To provide an astronomic wrist watch into which visual display of one day of a celestial body, in particular of the moon, can be built together with a display of the phase of the celestial body.SOLUTION: An astronomic wrist watch has gear trains 2 for a constant-frequency gear drive device of the output of a watch movement and a mechanism 1 for displaying one day and the phase of at least one celestial body. The mechanism 1 has means 3 for three-dimensional displaying of the one day and phase of a first celestial body represented by a first movable constituent member 5; the means 3 is driven by the gear trains 2; the gear trains 2 include a for-phase gear train 10 and a for-one-day gear train 20, and these gear trains are caused to mesh with each other by the output of the same watch movement. These for-phase gear train 10 and for-one-day gear train 20 include at least one unit of linkage dissolving means between their inputs and outputs. |
