JPS5558766A - Step motor for electronic wrist watch - Google Patents

Step motor for electronic wrist watch

Info

Publication number
JPS5558766A
JPS5558766A JP13232978A JP13232978A JPS5558766A JP S5558766 A JPS5558766 A JP S5558766A JP 13232978 A JP13232978 A JP 13232978A JP 13232978 A JP13232978 A JP 13232978A JP S5558766 A JPS5558766 A JP S5558766A
Authority
JP
Japan
Prior art keywords
rotor
projections
magnetic poles
step motor
stator
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
JP13232978A
Other languages
Japanese (ja)
Inventor
Tomohiko Abe
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP13232978A priority Critical patent/JPS5558766A/en
Publication of JPS5558766A publication Critical patent/JPS5558766A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To provide a thin compact step motor whose multipolar rotor can be easily manufactured, by using a rotor made of only a magnetically soft material of high permeability, a positioning stator including a permanent magnet member and an electromagnet for driving the rotor.
CONSTITUTION: A rotor 1 is made of such a magnetically soft material of high permeability as nickel-chromium steel or pure iron and has projections 2 at an equal spacing on the peripheral part. A positioning stator 3 is placed outside the rotor 1. The stator 3 includes a permanent magnet member 4 and foot parts 5 facing the projections 2 of the rotor 1. A driving electromagnet 6 having magnetic poles 7 is so provided that the magnetic poles are located at an angle of ϕ to the projections 2 of the rotor 1. Supplying an electrical current to a coil 8, the rotor 1 is rotated clockwise from a stop position in which the projections 2 face the foot parts 5. The current is cut off before the projections 2 face the magnetic poles 7. The rotor 1 is thus rotated to a next stop position by the moment of inertia.
COPYRIGHT: (C)1980,JPO&Japio
JP13232978A 1978-10-27 1978-10-27 Step motor for electronic wrist watch Pending JPS5558766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13232978A JPS5558766A (en) 1978-10-27 1978-10-27 Step motor for electronic wrist watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13232978A JPS5558766A (en) 1978-10-27 1978-10-27 Step motor for electronic wrist watch

Publications (1)

Publication Number Publication Date
JPS5558766A true JPS5558766A (en) 1980-05-01

Family

ID=15078767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13232978A Pending JPS5558766A (en) 1978-10-27 1978-10-27 Step motor for electronic wrist watch

Country Status (1)

Country Link
JP (1) JPS5558766A (en)

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