JPS54127365A - Step motor for electronic watch - Google Patents

Step motor for electronic watch

Info

Publication number
JPS54127365A
JPS54127365A JP3508578A JP3508578A JPS54127365A JP S54127365 A JPS54127365 A JP S54127365A JP 3508578 A JP3508578 A JP 3508578A JP 3508578 A JP3508578 A JP 3508578A JP S54127365 A JPS54127365 A JP S54127365A
Authority
JP
Japan
Prior art keywords
running
backward
circuit
motor
inputted
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
JP3508578A
Other languages
Japanese (ja)
Other versions
JPS629875B2 (en
Inventor
Shiyuuji Ootawa
Akira Usawa
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 JP3508578A priority Critical patent/JPS54127365A/en
Publication of JPS54127365A publication Critical patent/JPS54127365A/en
Publication of JPS629875B2 publication Critical patent/JPS629875B2/ja
Granted 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
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor

Abstract

PURPOSE:To eliminate the effect of variations in the time for saturating the minimum width part of a stator and stably run the motor backward by applying the control signal for magnetic erasing then starting backward running operation at the time of switching from forward running to backward operation and normally keeping applying the control signal during the backward running. CONSTITUTION:The output of an oscillation circuit 50 using crystal is frequency divided with a frequency dividing circuit 51 and the signals thereof are suitably inputted to a synthesizing circuit 52 they are waveform synthesized. The forward-backward running signals from a forward-backward running control circuit 55 are inputted to the synthesizing circuit 52 and the output thereof is inputted to a driving circuit 53. The motor is driven by the output of the driving circuit 53. At the reverse running of the rotor, the control signal being small to the extent of not causing the rotor to start moving is applied in the same polarity direction as that of the pulses being applied to the motor at its forward running, whereby the effect of the variations of the time for saturating the stator minimum width part of the integral stator is eliminated and the motor running backward stably is obtained voluminously.
JP3508578A 1978-03-27 1978-03-27 Step motor for electronic watch Granted JPS54127365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3508578A JPS54127365A (en) 1978-03-27 1978-03-27 Step motor for electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3508578A JPS54127365A (en) 1978-03-27 1978-03-27 Step motor for electronic watch

Publications (2)

Publication Number Publication Date
JPS54127365A true JPS54127365A (en) 1979-10-03
JPS629875B2 JPS629875B2 (en) 1987-03-03

Family

ID=12432123

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3508578A Granted JPS54127365A (en) 1978-03-27 1978-03-27 Step motor for electronic watch

Country Status (1)

Country Link
JP (1) JPS54127365A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7154817B2 (en) 2002-12-18 2006-12-26 Asulab S.A. Electronic apparatus including an analogue display device for displaying any position on a dial

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7154817B2 (en) 2002-12-18 2006-12-26 Asulab S.A. Electronic apparatus including an analogue display device for displaying any position on a dial

Also Published As

Publication number Publication date
JPS629875B2 (en) 1987-03-03

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