GB2015266A - A rotor assembly for a stepping motor - Google Patents

A rotor assembly for a stepping motor

Info

Publication number
GB2015266A
GB2015266A GB7901218A GB7901218A GB2015266A GB 2015266 A GB2015266 A GB 2015266A GB 7901218 A GB7901218 A GB 7901218A GB 7901218 A GB7901218 A GB 7901218A GB 2015266 A GB2015266 A GB 2015266A
Authority
GB
United Kingdom
Prior art keywords
bore
pinion
stepping motor
rotor assembly
gap
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
GB7901218A
Other versions
GB2015266B (en
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 Watch Co Ltd
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 date
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 GB2015266A publication Critical patent/GB2015266A/en
Application granted granted Critical
Publication of GB2015266B publication Critical patent/GB2015266B/en
Expired legal-status Critical Current

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

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>
GB7901218A 1978-01-14 1979-01-12 Rotor assembly for a stepping motor Expired GB2015266B (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
GB2015266A true GB2015266A (en) 1979-09-05
GB2015266B GB2015266B (en) 1982-10-20

Family

ID=27275649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7901218A Expired GB2015266B (en) 1978-01-14 1979-01-12 Rotor assembly for a stepping motor

Country Status (3)

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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6155961A (en) * 1997-09-12 2000-12-05 Bridgeport Machines Limited Tool carousel
EP1156574A2 (en) * 2000-05-17 2001-11-21 Fujitsu General Limited Rotor of electric motor and method for manufacturing the same
FR2810469A1 (en) * 2000-06-15 2001-12-21 Valeo Electric motor for servo assistance in vehicle comprise two part stator with collector rings and carbon brush structure with reduced overall size
US8004141B2 (en) 2005-04-29 2011-08-23 Sntech Inc. Two-phase brushless DC motor
US8033007B2 (en) 2007-05-11 2011-10-11 Sntech, Inc. Method of making rotor of brushless motor
US8080907B2 (en) * 2007-10-25 2011-12-20 Young-Chun Jeung Rotor of brushless (BL) motor
US8299661B2 (en) * 2007-05-11 2012-10-30 Sntech Inc. Rotor of brushless motor

Families Citing this family (2)

* 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
CN1251381C (en) * 1998-04-23 2006-04-12 西铁城时计株式会社 Rotor of small-sized 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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6155961A (en) * 1997-09-12 2000-12-05 Bridgeport Machines Limited Tool carousel
EP1156574A2 (en) * 2000-05-17 2001-11-21 Fujitsu General Limited Rotor of electric motor and method for manufacturing the same
EP1156574A3 (en) * 2000-05-17 2004-01-02 Fujitsu General Limited Rotor of electric motor and method for manufacturing the same
FR2810469A1 (en) * 2000-06-15 2001-12-21 Valeo Electric motor for servo assistance in vehicle comprise two part stator with collector rings and carbon brush structure with reduced overall size
US8004141B2 (en) 2005-04-29 2011-08-23 Sntech Inc. Two-phase brushless DC 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
US8080907B2 (en) * 2007-10-25 2011-12-20 Young-Chun Jeung Rotor of brushless (BL) motor

Also Published As

Publication number Publication date
CH628773GA3 (en) 1982-03-31
DE2900756C2 (en) 1983-08-04
DE2900756A1 (en) 1979-07-19
CH628773B (en)
GB2015266B (en) 1982-10-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee