| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a 24-hour hand is set to the position of a day driving wheel so as to restrict the degree of freedom of a design. SOLUTION: The watch with a rotating display is constituted of a day plate 8 to be turned so as to be interlocked with a tube wheel 3 to which an hour hand is attached, the day driving wheel 7 which is arranged between the day plate 8 and the tube wheel 3 and which is turned so as to be interlocked with them, a subhand wheel 5 to which the 24-hour hand 6 displaying 24 hours is attached and which is arranged and installed in the position of 3 o'clock, and a subhand intermediate wheel 4 which is arranged between the subhand wheel 5 and the tube wheel 3 and which is turned so as to be interlocked with them. The pinion of the tube wheel 3 arranged in the center of the watch is of a two-stage structure. The pinion has two kinds of different tooth forms. One pinion 3a has the tooth form which is transmitted to the wheel 7 and which attaches importance to the load of the feed of the day plate. The other pinion 3b has the tooth form which is transmitted to the wheel 4 and which attaches importance to the speed error value of the hand 6. The tube wheel 3 is molded integrally by a plastic injection molding operation. The hand 6 may be a disk display member. Irrespective of the arrangement and installation position of the wheel 7, the watch with the rotating display can be designed by giving priority to the design.
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