JPS5583871A - Driving system of step motor for watch - Google Patents

Driving system of step motor for watch

Info

Publication number
JPS5583871A
JPS5583871A JP15942078A JP15942078A JPS5583871A JP S5583871 A JPS5583871 A JP S5583871A JP 15942078 A JP15942078 A JP 15942078A JP 15942078 A JP15942078 A JP 15942078A JP S5583871 A JPS5583871 A JP S5583871A
Authority
JP
Japan
Prior art keywords
step motor
unoperation
watch
state
driving pulses
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
JP15942078A
Other languages
Japanese (ja)
Inventor
Nobuo Toyama
Narikazu Takahashi
Shinji Sawada
Masaki Obayashi
Tsutomu Ogasawara
Toshihiko Sakai
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.)
Ricoh Elemex Corp
Ricoh Co Ltd
Original Assignee
Ricoh Elemex Corp
Ricoh Co Ltd
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 Ricoh Elemex Corp, Ricoh Co Ltd filed Critical Ricoh Elemex Corp
Priority to JP15942078A priority Critical patent/JPS5583871A/en
Publication of JPS5583871A publication Critical patent/JPS5583871A/en
Pending 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
    • G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step

Landscapes

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

Abstract

PURPOSE:To increase a driving torque to reduce needless power consumption by detecting the unoperation state of a step motor. CONSTITUTION:Crystal watch 1 is provided with cirfuit 19 which detects that a step motor does not perform a prescribed rotation drive when driving pulses are applied normally, circuit 20 which outputs fast-feeding driving pulses in stead of driving pulses making no contribution to the prescribed rotation drive to correct instantaneously delay of the watch, timer circuit 21 which increase the coil magnetomotive force of magnetic field coil part 4 for a prescribed time when the unoperation state of the step motor is detected by 19. Then, detection circuit 19 detects the unoperation state of the step motor by comparing a voltage, which is generated by the driving current flowed to coil part 4, and a reference voltage with each other.
JP15942078A 1978-12-20 1978-12-20 Driving system of step motor for watch Pending JPS5583871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15942078A JPS5583871A (en) 1978-12-20 1978-12-20 Driving system of step motor for watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15942078A JPS5583871A (en) 1978-12-20 1978-12-20 Driving system of step motor for watch

Publications (1)

Publication Number Publication Date
JPS5583871A true JPS5583871A (en) 1980-06-24

Family

ID=15693346

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15942078A Pending JPS5583871A (en) 1978-12-20 1978-12-20 Driving system of step motor for watch

Country Status (1)

Country Link
JP (1) JPS5583871A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007278884A (en) * 2006-04-07 2007-10-25 Seiko Clock Inc Pulse motor drive device for watch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007278884A (en) * 2006-04-07 2007-10-25 Seiko Clock Inc Pulse motor drive device for watch

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