发明公开
- 专利标题: Electronic timepiece
- 专利标题(中): 电子时计
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申请号: EP98303226.9申请日: 1998-04-27
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公开(公告)号: EP0874292A3公开(公告)日: 1999-03-03
- 发明人: Nakajima, Kenichi , Satodate, Takayuki , Matouge, Akihiro , Inada, Akihiko , Ishii, Mitsuru , Koyama, Yoshio , Suzuki, Shigeo , Kawata, Masayuki , Sasaki, Yuko , Takakuwa, Eriko
- 申请人: SEIKO INSTRUMENTS INC.
- 申请人地址: 8 Nakase 1-chome, Mihama-ku Chiba-shi, Chiba 261 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: 8 Nakase 1-chome, Mihama-ku Chiba-shi, Chiba 261 JP
- 代理机构: Sturt, Clifford Mark
- 优先权: JP109445/97 19970425; JP109446/97 19970425; JP16701/98 19980129; JP86710/98 19980331
- 主分类号: G04C3/14
- IPC分类号: G04C3/14
摘要:
To provide an electronic timepiece enabling reliable detection of a state of rotation of an indication wheel such as a date dial. An ultrasonic motor 1130 has an ultrasonic rotor pinion 1134b. A date dial 1120 is disposed on a main plate 1102 in such a way as to rotate relative thereto. The ultrasonic rotor pinion 1134b is meshed with an intermediate date driving gear wheel 1142a. A date driving wheel 1150 is rotatably disposed on the main plate 1102. A date driving gear wheel 1150b is meshed with an intermediate date driving pinion 1142b. A date driving gear portion 1150b is meshed with a dial gear portion 1120a. A contact point spring 1160 is disposed on a spring guiding portion 1150d. The contact point spring 1160 rotates integrally with the date driving wheel 1150 through the rotation of the date driving wheel 1150. The state of rotation of the date driving wheel 1150 can be detected by contact of the contact point spring 1160 with the contact point pattern 1174.
公开/授权文献
- EP0874292B1 Electronic timepiece 公开/授权日:2005-10-26
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