JPS57180366A - Yoke for step motor of timepiece and manufacture thereof - Google Patents

Yoke for step motor of timepiece and manufacture thereof

Info

Publication number
JPS57180366A
JPS57180366A JP6561981A JP6561981A JPS57180366A JP S57180366 A JPS57180366 A JP S57180366A JP 6561981 A JP6561981 A JP 6561981A JP 6561981 A JP6561981 A JP 6561981A JP S57180366 A JPS57180366 A JP S57180366A
Authority
JP
Japan
Prior art keywords
yoke
stepwise
step motor
hole
timepiece
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
JP6561981A
Other languages
Japanese (ja)
Inventor
Satoru Sugiyama
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.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
Original Assignee
Citizen Holdings Co Ltd
Citizen Watch 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 Citizen Holdings Co Ltd, Citizen Watch Co Ltd filed Critical Citizen Holdings Co Ltd
Priority to JP6561981A priority Critical patent/JPS57180366A/en
Publication of JPS57180366A publication Critical patent/JPS57180366A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
    • H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
    • H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
    • H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K37/16—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures having horseshoe armature cores

Abstract

PURPOSE:To simplify the manufacturing steps of a yoke for a step motor of a timepiece by forming a hole for exciting a rotor in a shape having a stepwise semicircle, and forming a low magnetic permeable part which is made of a shearing layer from the stepwise part to the outer periphery, thereby magneticaly isolating right and left yokes and mechanically coupling them. CONSTITUTION:Mounting holes for magnetically coupling with a coil are formed at both ends of a yoke for a step motor. A hole 8 for magnetizing a rotor is opened nearly at the center. This hole 8 is formed in a shape having a stepwise semicircle, and is formed with a low magnetic permeable part which is made of a shearing layer from the stepwise part 3 to the outer periphery.
JP6561981A 1981-04-30 1981-04-30 Yoke for step motor of timepiece and manufacture thereof Pending JPS57180366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6561981A JPS57180366A (en) 1981-04-30 1981-04-30 Yoke for step motor of timepiece and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6561981A JPS57180366A (en) 1981-04-30 1981-04-30 Yoke for step motor of timepiece and manufacture thereof

Publications (1)

Publication Number Publication Date
JPS57180366A true JPS57180366A (en) 1982-11-06

Family

ID=13292213

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6561981A Pending JPS57180366A (en) 1981-04-30 1981-04-30 Yoke for step motor of timepiece and manufacture thereof

Country Status (1)

Country Link
JP (1) JPS57180366A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0690556A (en) * 1992-09-04 1994-03-29 Citizen Watch Co Ltd Miniaturized pulse motor
JP5854448B1 (en) * 2015-08-25 2016-02-09 則雄 宮内 Step motor processing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0690556A (en) * 1992-09-04 1994-03-29 Citizen Watch Co Ltd Miniaturized pulse motor
JP5854448B1 (en) * 2015-08-25 2016-02-09 則雄 宮内 Step motor processing method

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