JPS5612848A - Rotor structure of motor for timepiece - Google Patents

Rotor structure of motor for timepiece

Info

Publication number
JPS5612848A
JPS5612848A JP8736979A JP8736979A JPS5612848A JP S5612848 A JPS5612848 A JP S5612848A JP 8736979 A JP8736979 A JP 8736979A JP 8736979 A JP8736979 A JP 8736979A JP S5612848 A JPS5612848 A JP S5612848A
Authority
JP
Japan
Prior art keywords
rotor
magnet
shaft portion
gear
large friction
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
JP8736979A
Other languages
Japanese (ja)
Inventor
Chiaki Sekine
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
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP8736979A priority Critical patent/JPS5612848A/en
Publication of JPS5612848A publication Critical patent/JPS5612848A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PURPOSE:To reduce the moment of inertia and the number of assemly steps, by using a rotor gear and rotor sent to thrust and hold a magnet and providing a member of large friction efficient or the like on an engaged surface on the magnet to heighten the holding force of the holding surface. CONSTITUTION:A perforated columnar rotor magnet 4 is aligned to the a portion 5 of a rotor shaft. A gear portion 5a is provided at one end of the shaft portion 5. The end face of the gear portion facing the shaft portion has a slightly ground section 5b. The shaft portion 5 is tightly fitted in the center hole of a perforated disc- shaped rotor seat 6. A rotor magnet 4 is thrusted and fixed on the slightly ground sectopm 5b. Resin such as plastics of large friction coefficient is provided or surface treatment such as aventurine treatment is effected on the engaged surfaces of the magnet 4 and the rotor seat 6 to increase the clamping force on the magnet 4. This results in reducing the number of assembly steps and heightening conversion efficiency.
JP8736979A 1979-07-10 1979-07-10 Rotor structure of motor for timepiece Pending JPS5612848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8736979A JPS5612848A (en) 1979-07-10 1979-07-10 Rotor structure of motor for timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8736979A JPS5612848A (en) 1979-07-10 1979-07-10 Rotor structure of motor for timepiece

Publications (1)

Publication Number Publication Date
JPS5612848A true JPS5612848A (en) 1981-02-07

Family

ID=13912975

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8736979A Pending JPS5612848A (en) 1979-07-10 1979-07-10 Rotor structure of motor for timepiece

Country Status (1)

Country Link
JP (1) JPS5612848A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004398A1 (en) * 1993-07-30 1995-02-09 Siemens Aktiengesellschaft Electromotive drive
TR28225A (en) * 1993-07-30 1996-02-16 Siemens Ag Electromotor drive assembly.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995004398A1 (en) * 1993-07-30 1995-02-09 Siemens Aktiengesellschaft Electromotive drive
TR28225A (en) * 1993-07-30 1996-02-16 Siemens Ag Electromotor drive assembly.

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