| 摘要 |
PROBLEM TO BE SOLVED: To provide a stepping motor in which magnetic resistance of each phase is equalized. SOLUTION: The stepping motor is provided with: a molded yoke 7 which is made up of a magnetic pole K<SB>1</SB>of a yoke 7aa and a magnetic pole K<SB>2</SB>of a yoke 7ab connected in an engagement state via an insulation resin M<SB>1</SB>, a pole teeth K<SB>3</SB>of a yoke 7ba and the magnetic pole K<SB>4</SB>of a yoke 7bb connected in the engagement state via an insulation resin M<SB>2</SB>, and the yoke 7ab and the yoke 7ba connected back to back via the insulation resins M<SB>1</SB>, M<SB>2</SB>; and a cylindrical casing 6 which has a body plate 6b with the peripheral edges of annular flanges F<SB>1</SB>-F<SB>4</SB>jointed on the inside surface. A molded yoke 7 has a protruding bearing holder 12 integrally via the opening of the cylindrical casing 6, which has a base plate 6a overlapped with the annular flange F<SB>1</SB>. A cut S is formed circumferentially inside a corner formed by the shell plate 6b and the bottom plate 6a. COPYRIGHT: (C)2008,JPO&INPIT
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