EP0874292A3 - Electronic timepiece - Google Patents

Electronic timepiece Download PDF

Info

Publication number
EP0874292A3
EP0874292A3 EP98303226A EP98303226A EP0874292A3 EP 0874292 A3 EP0874292 A3 EP 0874292A3 EP 98303226 A EP98303226 A EP 98303226A EP 98303226 A EP98303226 A EP 98303226A EP 0874292 A3 EP0874292 A3 EP 0874292A3
Authority
EP
European Patent Office
Prior art keywords
date driving
date
wheel
contact point
meshed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98303226A
Other languages
German (de)
French (fr)
Other versions
EP0874292B1 (en
EP0874292A2 (en
Inventor
Kenichi Nakajima
Takayuki Satodate
Akihiro Matouge
Akihiko Inada
Mitsuru Ishii
Yoshio Koyama
Shigeo Suzuki
Masayuki Kawata
Yuko Sasaki
Eriko Takakuwa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP10944597A external-priority patent/JP3165070B2/en
Priority claimed from JP10086710A external-priority patent/JP3002969B2/en
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of EP0874292A2 publication Critical patent/EP0874292A2/en
Publication of EP0874292A3 publication Critical patent/EP0874292A3/en
Application granted granted Critical
Publication of EP0874292B1 publication Critical patent/EP0874292B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/12—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by piezoelectric means; driven by magneto-strictive means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C17/00—Indicating the time optically by electric means
    • G04C17/005—Indicating the time optically by electric means by discs
    • G04C17/0058—Indicating the time optically by electric means by discs with date indication
    • G04C17/0066—Indicating the time optically by electric means by discs with date indication electromagnetically driven, e.g. intermittently

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromechanical Clocks (AREA)

Abstract

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.
EP19980303226 1997-04-25 1998-04-27 Electronic timepiece Expired - Lifetime EP0874292B1 (en)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
JP10944597A JP3165070B2 (en) 1997-04-25 1997-04-25 Electronic clock with calendar
JP10944697 1997-04-25
JP10944597 1997-04-25
JP109446/97 1997-04-25
JP10944697 1997-04-25
JP109445/97 1997-04-25
JP1670198 1998-01-29
JP16701/98 1998-01-29
JP1670198 1998-01-29
JP8671098 1998-03-31
JP86710/98 1998-03-31
JP10086710A JP3002969B2 (en) 1997-04-25 1998-03-31 Electronic clock

Publications (3)

Publication Number Publication Date
EP0874292A2 EP0874292A2 (en) 1998-10-28
EP0874292A3 true EP0874292A3 (en) 1999-03-03
EP0874292B1 EP0874292B1 (en) 2005-10-26

Family

ID=27456622

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980303226 Expired - Lifetime EP0874292B1 (en) 1997-04-25 1998-04-27 Electronic timepiece

Country Status (4)

Country Link
EP (1) EP0874292B1 (en)
CN (1) CN1132079C (en)
DE (1) DE69831998T2 (en)
HK (1) HK1019775A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2935182B1 (en) * 1998-02-13 1999-08-16 セイコーインスツルメンツ株式会社 Electronic clock
EP2180383B1 (en) * 2008-10-24 2012-01-25 ETA SA Manufacture Horlogère Suisse Device to assist in maintaining the position of a date disc for a timepiece
JP5573870B2 (en) * 2012-03-12 2014-08-20 カシオ計算機株式会社 Display device and electronic clock
JP7205073B2 (en) * 2018-04-23 2023-01-17 セイコーエプソン株式会社 electronic clock

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1557667A (en) * 1966-09-13 1969-02-21
US3855781A (en) * 1972-12-22 1974-12-24 Suwa Seikosha Kk Step motor mechanism for electronic timepiece
JPS5658680A (en) * 1979-10-18 1981-05-21 Seikosha Co Ltd Time detection device
US4271494A (en) * 1977-10-06 1981-06-02 Kabushiki Kaisha Daini Seikosha Correcting device for calendar in an analog type electronic watch
JPS6051478A (en) * 1983-08-26 1985-03-22 Seiko Instr & Electronics Ltd Electronic timepiece
US4522506A (en) * 1983-09-21 1985-06-11 Seikosha Co., Ltd. Time signal clock
DE3813935A1 (en) * 1988-04-23 1989-11-02 Proizv Ob Mi Casovoj Z SWITCH FOR ELECTRONIC WATCHES
US5357489A (en) * 1992-09-09 1994-10-18 Asulab S.A. Timepiece provided with driving means formed by a piezo-electric motor
EP0759584A1 (en) * 1995-08-22 1997-02-26 Eta SA Fabriques d'Ebauches Synchronisation means with time zone detector

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1557667A (en) * 1966-09-13 1969-02-21
US3855781A (en) * 1972-12-22 1974-12-24 Suwa Seikosha Kk Step motor mechanism for electronic timepiece
US4271494A (en) * 1977-10-06 1981-06-02 Kabushiki Kaisha Daini Seikosha Correcting device for calendar in an analog type electronic watch
JPS5658680A (en) * 1979-10-18 1981-05-21 Seikosha Co Ltd Time detection device
JPS6051478A (en) * 1983-08-26 1985-03-22 Seiko Instr & Electronics Ltd Electronic timepiece
US4522506A (en) * 1983-09-21 1985-06-11 Seikosha Co., Ltd. Time signal clock
DE3813935A1 (en) * 1988-04-23 1989-11-02 Proizv Ob Mi Casovoj Z SWITCH FOR ELECTRONIC WATCHES
US5357489A (en) * 1992-09-09 1994-10-18 Asulab S.A. Timepiece provided with driving means formed by a piezo-electric motor
EP0759584A1 (en) * 1995-08-22 1997-02-26 Eta SA Fabriques d'Ebauches Synchronisation means with time zone detector

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 005, no. 118 (P - 073) 30 July 1981 (1981-07-30) *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 181 (E - 331) 26 July 1985 (1985-07-26) *

Also Published As

Publication number Publication date
CN1132079C (en) 2003-12-24
CN1204790A (en) 1999-01-13
DE69831998D1 (en) 2005-12-01
EP0874292B1 (en) 2005-10-26
HK1019775A1 (en) 2000-02-25
DE69831998T2 (en) 2006-04-20
EP0874292A2 (en) 1998-10-28

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