发明授权
- 专利标题: Electronic timepiece
- 专利标题(中): 电子钟表
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申请号: US09583136申请日: 2000-05-30
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公开(公告)号: US06584040B1公开(公告)日: 2003-06-24
- 发明人: Kenichi Nakajima , Takayuki Satodate , Akihiro Matouge , Akihiko Inada , Mitsuru Ishii , Yoshio Koyama , Shigeo Suzuki , Masayuki Kawata , Yuko Sasaki , Eriko Takakuwa
- 申请人: Kenichi Nakajima , Takayuki Satodate , Akihiro Matouge , Akihiko Inada , Mitsuru Ishii , Yoshio Koyama , Shigeo Suzuki , Masayuki Kawata , Yuko Sasaki , Eriko Takakuwa
- 优先权: JP9-109446 19970425; JP9-109455 19970425; JP10-016701 19980129; JP10-086710 19980331
- 主分类号: G04B1924
- IPC分类号: G04B1924
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.
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