CH628773B - METHOD OF MANUFACTURING A ROTOR FOR A STEPPER MOTOR. - Google Patents

METHOD OF MANUFACTURING A ROTOR FOR A STEPPER MOTOR.

Info

Publication number
CH628773B
CH628773B CH23379A CH23379A CH628773B CH 628773 B CH628773 B CH 628773B CH 23379 A CH23379 A CH 23379A CH 23379 A CH23379 A CH 23379A CH 628773 B CH628773 B CH 628773B
Authority
CH
Switzerland
Prior art keywords
rotor
bore
pinion
gap
manufacturing
Prior art date
Application number
CH23379A
Other languages
German (de)
Other versions
CH628773GA3 (en
Inventor
Hiroki Nomura
Kenji Miyake
Masaru Koyanagi
Masao Mafune
Chiaki Sekine
Original Assignee
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 of CH628773B publication Critical patent/CH628773B/en
Priority claimed from JP308278A external-priority patent/JPS5499473A/en
Priority claimed from JP2622778A external-priority patent/JPS54119607A/en
Priority claimed from JP11053778A external-priority patent/JPS5537867A/en
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Publication of CH628773GA3 publication Critical patent/CH628773GA3/de

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C13/00—Driving mechanisms for clocks by master-clocks
    • G04C13/08—Slave-clocks actuated intermittently
    • G04C13/10—Slave-clocks actuated intermittently by electromechanical step advancing mechanisms
    • G04C13/11—Slave-clocks actuated intermittently by electromechanical step advancing mechanisms with rotating armature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Electromechanical Clocks (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

A rotor assembly for a stepping motor for an electronic timepiece comprises a rotor magnet 10 which is bonded to a pinion by means of a bonding agent disposed in a gap between a bore in the rotor magnet and the pinion periphery. In manufacture a non-magnetic filler powder of glass, ceramic or metal is placed in the gap and, as shown, liquid epoxy resin 48 is introduced, this being subsequently hardened. The magnet may be of samarium cobalt material and provided with a plastics coating, A plastics film or a boss on the pinion may seal the bottom of the bore. The bore may be conical in shape. <IMAGE>
CH23379A 1978-01-14 1979-01-10 METHOD OF MANUFACTURING A ROTOR FOR A STEPPER MOTOR. CH628773B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP308278A JPS5499473A (en) 1978-01-14 1978-01-14 Rotor structure of step motor for watches
JP2622778A JPS54119607A (en) 1978-03-08 1978-03-08 Rotor structure of step motor for timepiece
JP11053778A JPS5537867A (en) 1978-09-08 1978-09-08 Rotor structure of comverter for timepiece

Publications (2)

Publication Number Publication Date
CH628773B true CH628773B (en)
CH628773GA3 CH628773GA3 (en) 1982-03-31

Family

ID=27275649

Family Applications (1)

Application Number Title Priority Date Filing Date
CH23379A CH628773B (en) 1978-01-14 1979-01-10 METHOD OF MANUFACTURING A ROTOR FOR A STEPPER MOTOR.

Country Status (3)

Country Link
CH (1) CH628773B (en)
DE (1) DE2900756C2 (en)
GB (1) GB2015266B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19617134A1 (en) * 1996-04-29 1997-10-30 Siemens Ag Brushless electric motor control magnet
GB2375061B (en) * 1997-09-12 2003-01-29 Bridgeport Machines Ltd Drive mechanism for a tool carousel wheel
EP1075073B1 (en) * 1998-04-23 2013-01-02 Citizen Holdings Co., Ltd. Rotor of small-sized motor
JP2001327105A (en) * 2000-05-17 2001-11-22 Fujitsu General Ltd Rotor of motor and its manufacturing method
FR2810469B1 (en) * 2000-06-15 2002-10-11 Valeo LOW-SIZE ELECTRICAL ROTATING MACHINE WITH HIGH PERFORMANCE
KR100653434B1 (en) 2005-04-29 2006-12-01 영 춘 정 Brushless DC motor
KR100915365B1 (en) * 2007-10-25 2009-09-03 영 춘 정 rotor of BL motor
US8033007B2 (en) 2007-05-11 2011-10-11 Sntech, Inc. Method of making rotor of brushless motor
US8299661B2 (en) * 2007-05-11 2012-10-30 Sntech Inc. Rotor of brushless motor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5088516A (en) * 1973-12-10 1975-07-16
US4095129A (en) * 1975-09-22 1978-06-13 Citizen Watch Company Limited Rotor assembly for electro-mechanical transducer of electronic timepiece

Also Published As

Publication number Publication date
GB2015266B (en) 1982-10-20
CH628773GA3 (en) 1982-03-31
DE2900756C2 (en) 1983-08-04
DE2900756A1 (en) 1979-07-19
GB2015266A (en) 1979-09-05

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