Title:
ステッピングモータ
Document Type and Number:
Japanese Patent JP5587667
Kind Code:
B2
Abstract:
A claw-pole-type stepping motor includes a stator annularly disposed therein and having a coil, a rotor rotatably disposed inside the stator and having a multiply magnetized permanent magnet and a shaft, an outer yoke provided in the stator and having a cup shape opening toward an axially outside direction an outer circumferential portion provided in the outer yoke and having a cylindrical shape and an inner circumferential portion including first pole teeth, an inner yoke provided in the stator and having second pole teeth provided in an inner circumference thereof and an outer circumferential portion fixed to an inner circumferential surface of the outer circumferential portion of the outer yoke, in which the first pole teeth and the second pole teeth are engaging with each other via a gap in an axial direction and are disposed with respect to the permanent magnet of the rotor via a gap, a fixed portion of the inner yoke and the outer yoke is positioned at the axial inside of an opening end of the cup shape of the outer yoke and the opening end protrudes beyond the fixed portion toward the axially outer direction.
Inventors:
Shuhei Kinbara
Yuzuru Suzuki
Seiya Fujimoto
Yuzuru Suzuki
Seiya Fujimoto
Application Number:
JP2010115115A
Publication Date:
September 10, 2014
Filing Date:
May 19, 2010
Export Citation:
Assignee:
Minebea Co., Ltd.
International Classes:
H02K37/14
Attorney, Agent or Firm:
End 成 Mikio