JPS5587077A - Detector for electronic watch - Google Patents

Detector for electronic watch

Info

Publication number
JPS5587077A
JPS5587077A JP16217178A JP16217178A JPS5587077A JP S5587077 A JPS5587077 A JP S5587077A JP 16217178 A JP16217178 A JP 16217178A JP 16217178 A JP16217178 A JP 16217178A JP S5587077 A JPS5587077 A JP S5587077A
Authority
JP
Japan
Prior art keywords
magnetic field
external magnetic
step motor
detection
immediately
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
JP16217178A
Other languages
Japanese (ja)
Inventor
Jun Ueda
Akira Torisawa
Shuji Otawa
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 JP16217178A priority Critical patent/JPS5587077A/en
Publication of JPS5587077A publication Critical patent/JPS5587077A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04CELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To increase the anti-magnetism of step motor of electronic watch without providing shield, by applying drive pulse to the step motor immediately after the detection of external magnetic field. CONSTITUTION:The external magnetic field is detected with the induced magnetic field of rotor rotation detection for the step motor and if no external magnetic field is detected, the drive pulse PD1 via the OR circuit 14 of the control section is fed to the step motor via the terminal 146 immediately after the detection of external magnetic field. When the external magnetic field is detected, RS type FF150 is set with the external magnetic field detection signal inputted from the terminal 141, the opening of the AND.OR gate 155 is controlled, the forced drive pulse PD2 is fed to the step motor via the terminal 146 immediately after the detection of external magnetic field and the step motor is driven without malfunction and without mis- judgement of rotation. Accordingly, no external magnetic field shield is required and the watch can be made small in size.
JP16217178A 1978-12-25 1978-12-25 Detector for electronic watch Pending JPS5587077A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16217178A JPS5587077A (en) 1978-12-25 1978-12-25 Detector for electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16217178A JPS5587077A (en) 1978-12-25 1978-12-25 Detector for electronic watch

Publications (1)

Publication Number Publication Date
JPS5587077A true JPS5587077A (en) 1980-07-01

Family

ID=15749362

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16217178A Pending JPS5587077A (en) 1978-12-25 1978-12-25 Detector for electronic watch

Country Status (1)

Country Link
JP (1) JPS5587077A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5587977A (en) * 1978-12-26 1980-07-03 Seiko Instr & Electronics Ltd Device for detecting electronic watch
JPS5587976A (en) * 1978-12-26 1980-07-03 Seiko Instr & Electronics Ltd Device for detecting electronic watch
JPS6052328A (en) * 1983-09-01 1985-03-25 Maruyama Kogyo Kk Thermal adhesion of sheet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5587977A (en) * 1978-12-26 1980-07-03 Seiko Instr & Electronics Ltd Device for detecting electronic watch
JPS5587976A (en) * 1978-12-26 1980-07-03 Seiko Instr & Electronics Ltd Device for detecting electronic watch
JPS6262307B2 (en) * 1978-12-26 1987-12-25 Seiko Denshi Kogyo Kk
JPS6052328A (en) * 1983-09-01 1985-03-25 Maruyama Kogyo Kk Thermal adhesion of sheet

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