| 摘要 |
PURPOSE:To mount a coil easily, and to improve the working property of assembly by properly determining the width of a bobbin, on which the coil is wound, and spaces and thickness among the noses of poles. CONSTITUTION:A stepping motor has an approximately square frame-shaped square-shaped stator core 20, in which poles 23-26, noses thereof each have a pllurality of convex sections 28-31 corresponding to the angles of stepping, are projected and formed at the central sections of the internal side edges of each side section, four coils 37 wound on bobbin fitted to the poles 23-26 of the core 20 and a rotor 27, to a circumferential surface thereof convex sections are shaped in response to the angles of stepping corresponding to the convex sections 28-31 of the poles 23-26. The width of the bobbin on which the coils 37 are wound is made approximately the same as the spaces among the noses of the opposite poles 23-26 while the thickness is formed in value approximately the same as projecting length up to noses from the side edges of several pole 23-26 and shorter than the outer diameter of the rotor 27. |
