| 摘要 |
PURPOSE:To improve the efficiency of a stepping motor, to reduce the size and to flatten the motor by enclosing a concentrically winding coil by a core, splitting the bent portion of the core for forming poles in the circumferential direction, and reducing a gap of a pole adjacent to a different polarity pole. CONSTITUTION:A bobbin 3 is formed concentrically on a shaft, and a coil 4 is wound on the bobbin 3. Upper and lower cores 5, 6 are bonded to the upper and lower surfaces of the bobbin, the cores 5, 6 are bent perpendicularly along the outer periphery of the bobbin 3, and the edges are butted. The cores 5, 6 are bent perpendicularly along the inner periphery of the bobbin 3, cut out with bent part remaining at point symmetrical position, the bent portion of the core 6 is disposed between the bent parts of the core 5, and entered circumferentially in the structure. |
