发明名称 Calendar mechanism and analog timepiece equipped with same mechanism
摘要 To provide a calendar mechanism which can easily and reliably cause first and second date indicators to coincide in rotation phase, and an analog timepiece equipped therewith. A calendar mechanism of an analog timepiece includes a first date indicator including a first date character indication portion which indicates the ones column of the date, a first date indicator gear portion, and a drive cam portion which defines an endless ring-shaped cam face; a drive cam lever which includes a driven lever portion whose one end portion abuts against the drive cam portion, and an operating lever portion which includes a first fan-shaped gear portion at the leading end portion, the operating lever portion being pivoted in accordance with the driven lever portion; and a second date indicator which, being rotatable, includes a second date character indication portion which indicates the tens column of the date, and a second fan-shaped gear portion meshing with the first fan-shaped gear portion. The first fan-shaped gear portion and second fan-shaped gear portion have specified teeth which are brought into selective meshing engagement in a condition in which the first date indicator and second date indicator coincide in rotation phase.
申请公布号 US8279717(B2) 申请公布日期 2012.10.02
申请号 US20100925375 申请日期 2010.10.20
申请人 HIRANO KEI;SEIKO INSTRUMENTS INC. 发明人 HIRANO KEI
分类号 G04B19/20 主分类号 G04B19/20
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