JPS5486723A - Step motor for electronic watch - Google Patents

Step motor for electronic watch

Info

Publication number
JPS5486723A
JPS5486723A JP15470177A JP15470177A JPS5486723A JP S5486723 A JPS5486723 A JP S5486723A JP 15470177 A JP15470177 A JP 15470177A JP 15470177 A JP15470177 A JP 15470177A JP S5486723 A JPS5486723 A JP S5486723A
Authority
JP
Japan
Prior art keywords
circuit
drive
step motor
motor
reversely
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.)
Pending
Application number
JP15470177A
Other languages
Japanese (ja)
Inventor
Shuji Otawa
Akira Torisawa
Jun Ueda
Masaaki Bandai
Masaharu Shida
Katsuhiko Sato
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
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP15470177A priority Critical patent/JPS5486723A/en
Publication of JPS5486723A publication Critical patent/JPS5486723A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To reversely drive a step motor at high speed while taking timing with next drive pulse by detecting two points of a drive current waveform to detect the rotating speed and rotating position of a rotor in case of reversely driving the motor. CONSTITUTION:The output of an oscillator 50 using a crystal is applied to a frequency divider 51 composed of 15-stage flip-flops (FF). The output of the divider 51 is applied to a synthesizer 52 for synthesizing pulses necessary for normally and reversely rotating a step motor 54 to supply normal or reverse pulse to a drive circuit 53 upon reception of signal from a control circuit 55 through a detecting circuit 56. The drive circuit 53 drives the motor 54. The circuit 55 controls normal or reverse rotation and the signal from the detecting circuit 56 to apply a control signal to the synthesizer 52.
JP15470177A 1977-12-22 1977-12-22 Step motor for electronic watch Pending JPS5486723A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15470177A JPS5486723A (en) 1977-12-22 1977-12-22 Step motor for electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15470177A JPS5486723A (en) 1977-12-22 1977-12-22 Step motor for electronic watch

Publications (1)

Publication Number Publication Date
JPS5486723A true JPS5486723A (en) 1979-07-10

Family

ID=15590049

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15470177A Pending JPS5486723A (en) 1977-12-22 1977-12-22 Step motor for electronic watch

Country Status (1)

Country Link
JP (1) JPS5486723A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58213278A (en) * 1982-06-04 1983-12-12 Citizen Watch Co Ltd Reversal driving system of step-motor of electronic clock
JPS6056285A (en) * 1983-09-07 1985-04-01 Seiko Epson Corp Electronic timepiece
JPS63103997A (en) * 1986-10-21 1988-05-09 Citizen Watch Co Ltd Electronic timepiece
CN111525854A (en) * 2019-02-05 2020-08-11 精工爱普生株式会社 Electronic timepiece, movement, and timepiece motor control circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58213278A (en) * 1982-06-04 1983-12-12 Citizen Watch Co Ltd Reversal driving system of step-motor of electronic clock
JPS6056285A (en) * 1983-09-07 1985-04-01 Seiko Epson Corp Electronic timepiece
JPS63103997A (en) * 1986-10-21 1988-05-09 Citizen Watch Co Ltd Electronic timepiece
CN111525854A (en) * 2019-02-05 2020-08-11 精工爱普生株式会社 Electronic timepiece, movement, and timepiece motor control circuit
JP2020125986A (en) * 2019-02-05 2020-08-20 セイコーエプソン株式会社 Electronic timepiece, movement, and motor control circuit for timepiece
CN111525854B (en) * 2019-02-05 2023-11-17 精工爱普生株式会社 Electronic timepiece, movement, and timepiece motor control circuit

Similar Documents

Publication Publication Date Title
GB1557408A (en) Driving arragement for an electronic timepliece
CH607603B (en) ELECTRONIC WATCH PART.
GB2009464B (en) Stepping motor driven analog timepieces
GB1305753A (en)
JPS5643575A (en) Electronic clock
JPS5452578A (en) Stopwatch
CH635973GA3 (en)
JPS5486723A (en) Step motor for electronic watch
FR2388330B1 (en)
HK18584A (en) Improvements in or relating to electronic timepieces with stepping motor driven analog time displays
GB2050655B (en) Electronic timepieces with stepping motor driven time displays
CH635720B (en) ELECTRONIC WATCH, ESPECIALLY ELECTRONIC BRACELET WATCH.
JPS5548682A (en) Measuring device for electronic watch
CH635721B (en) ELECTRONIC WATCH, ESPECIALLY ELECTRONIC BRACELET WATCH, WITH ANALOGUE DISPLAY.
JPS5635834B2 (en)
JPS5533642A (en) Step motor device for electronic watch
US4415276A (en) Electronic timepiece
JPS5558765A (en) Step motor for electronic timepiece
JPS5619475A (en) Electronic timepiece with battery life display
JPS5548681A (en) Measuring device for electronic watch
JPS55158581A (en) Synchronous motor driving unit for clock
JPS5520467A (en) Analogue electronic stop watch
SU915195A1 (en) Device for control of electric drive rotational speed
JPS5479412A (en) Electronic clock use step motor
JPS5370877A (en) Electronic wristwatch