Invention Grant
- Patent Title: Multifunction timepiece having fan shape moving hand mechanism including return spring and fan shape moving hand train wheel apparatus
- Patent Title (中): 具有扇形移动手机构的多功能钟表包括复位弹簧和扇形移动手轮轮装置
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Application No.: US11297128Application Date: 2005-12-08
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Publication No.: US07269101B2Publication Date: 2007-09-11
- Inventor: Mamoru Watanabe , Takeshi Tokoro , Kei Hirano
- Applicant: Mamoru Watanabe , Takeshi Tokoro , Kei Hirano
- Applicant Address: JP
- Assignee: Seiko Instruments Inc.
- Current Assignee: Seiko Instruments Inc.
- Current Assignee Address: JP
- Agency: Adams & Wilks
- Priority: JP2004-362812 20041215
- Main IPC: G04B19/24
- IPC: G04B19/24

Abstract:
To realize an analog multifunction timepiece which is small sized and does not need much time period in operation of fabricating and integrating a part by adopting a fan shape moving hand mechanism without using a hairspring. A movement of a multifunction timepiece is provided with a calendar information display mechanism. The calendar information display mechanism is provided with a transmission wheel having a transmission cam portion, a display wheel constituted to rotate based on rotation of the transmission wheel and for displaying calendar information, a first hammer rotatably provided by being brought into contact with a transmission cam portion, and a second hammer rotatably provided in corporation with the display wheel. The first hammer includes a cam contact portion and an operating wheel portion. The second hammer is constituted to always receive a force of rotating in a constant direction.
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