CH668351GA3 - Stepper motor magnetised rotor for electric timepiece - is embedded in one-piece moulded plastics cylinder with pinion formed integrally on one end wall - Google Patents

Stepper motor magnetised rotor for electric timepiece - is embedded in one-piece moulded plastics cylinder with pinion formed integrally on one end wall Download PDF

Info

Publication number
CH668351GA3
CH668351GA3 CH359186A CH359186A CH668351GA3 CH 668351G A3 CH668351G A3 CH 668351GA3 CH 359186 A CH359186 A CH 359186A CH 359186 A CH359186 A CH 359186A CH 668351G A3 CH668351G A3 CH 668351GA3
Authority
CH
Switzerland
Prior art keywords
rotor
embedded
end wall
formed integrally
stepper motor
Prior art date
Application number
CH359186A
Other languages
German (de)
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 filed Critical
Priority to CH359186A priority Critical patent/CH668351GA3/en
Publication of CH668351GA3 publication Critical patent/CH668351GA3/en

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
    • 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

Abstract

An annular magnet (2) around the shaft (1) of the rotor with a radially projecting collar (8) is held concentrically by a cylindrical plastics body (3) having two walls (10,11). The collar (8) extends from the shaft (1) in the region of the thicker wall (11), and prevents axial displacement of the shaft in either direction. A pinion (4) is formed on the thinner wall (10) of the plastics body (3). The magnet (2) may be held by a tool engaging in recesses (12) while the body (3) is being formed. The individual components of the rotor are of simple shape and can be mass-produced cheaply. After injection moulding the rotor requires no further processing. ADVANTAGE - Can be mfd. in large nubmers at low cost.
CH359186A 1986-09-08 1986-09-08 Stepper motor magnetised rotor for electric timepiece - is embedded in one-piece moulded plastics cylinder with pinion formed integrally on one end wall CH668351GA3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH359186A CH668351GA3 (en) 1986-09-08 1986-09-08 Stepper motor magnetised rotor for electric timepiece - is embedded in one-piece moulded plastics cylinder with pinion formed integrally on one end wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH359186A CH668351GA3 (en) 1986-09-08 1986-09-08 Stepper motor magnetised rotor for electric timepiece - is embedded in one-piece moulded plastics cylinder with pinion formed integrally on one end wall

Publications (1)

Publication Number Publication Date
CH668351GA3 true CH668351GA3 (en) 1988-12-30

Family

ID=4259287

Family Applications (1)

Application Number Title Priority Date Filing Date
CH359186A CH668351GA3 (en) 1986-09-08 1986-09-08 Stepper motor magnetised rotor for electric timepiece - is embedded in one-piece moulded plastics cylinder with pinion formed integrally on one end wall

Country Status (1)

Country Link
CH (1) CH668351GA3 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2221842A1 (en) * 1973-03-16 1974-10-11 Mallory & Co Inc P R
GB1546990A (en) * 1976-12-22 1979-06-06 Citizen Watch Co Ltd Rotor assembly for electro-mechanical transducer
GB2025151A (en) * 1978-04-20 1980-01-16 Citizen Watch Co Ltd Rotor assembly and method of manufacture therefor
JPS55162865A (en) * 1979-06-06 1980-12-18 Citizen Watch Co Ltd Rotor structure for converter for clock
US4587450A (en) * 1984-01-06 1986-05-06 Sanyei Corporation Synchronous motor rotor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2221842A1 (en) * 1973-03-16 1974-10-11 Mallory & Co Inc P R
GB1546990A (en) * 1976-12-22 1979-06-06 Citizen Watch Co Ltd Rotor assembly for electro-mechanical transducer
GB2025151A (en) * 1978-04-20 1980-01-16 Citizen Watch Co Ltd Rotor assembly and method of manufacture therefor
JPS55162865A (en) * 1979-06-06 1980-12-18 Citizen Watch Co Ltd Rotor structure for converter for clock
US4587450A (en) * 1984-01-06 1986-05-06 Sanyei Corporation Synchronous motor rotor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 40 (E-49)[712], 17. März 1981; & JP-A-55 162 865 (CITIZEN) *

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