发明授权
US07457202B2 Date display mechanism and timepiece possessing date display mechanism
有权
日期显示机构和钟表具有日期显示机制
- 专利标题： Date display mechanism and timepiece possessing date display mechanism
- 专利标题（中）： 日期显示机构和钟表具有日期显示机制
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申请号： US11155957申请日： 2005-06-17
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公开(公告)号： US07457202B2公开(公告)日： 2008-11-25
- 发明人: Masaaki Takahashi
- 申请人： Masaaki Takahashi
- 申请人地址： JP
- 专利权人： Seiko Instruments Inc.
- 当前专利权人： Seiko Instruments Inc.
- 当前专利权人地址： JP
- 代理机构： Adams & Wilks
- 优先权： JP2004-194268 20040630
- 主分类号： G04B19/24
- IPC分类号： G04B19/24
摘要：
A date display mechanism has a first driving wheel that rotationally drives a first date indicator for displaying places of units and a second driving wheel that rotationally drives a second date indicator for displaying places of tens. The second driving wheel causes the second driving wheel to rotate by one tooth when the date shifts from a 9th day to a l0th day, from a 19th day to a 20th day, and from a 29th day to a 30th day. A program wheel performs one revolution in 31 days and controls rotation of the first date indicator and the second date indicator so that from the 1st day to the 31st day, the first date indicator is rotated by one tooth every day, and so that when the date shifts from the 31st day to 1st day, the first date indicator is retained to a position of the 31st day and the second date indicator is rotated by one tooth to thereby cause the 1st day to be displayed by the date display window.