| 摘要 |
PURPOSE: A brushless DC motor with a speed-reduction structure is provided to facilitate a manufacturing process by overlapping an electrode of the upper pole plate and a corresponding electrodes of the lower pole plate. CONSTITUTION: A brushless DC motor with a speed-reduction structure comprises a rotor(10), an axis tube(20), a bobbin(300), an upper pole plate(310), a lower pole plate(320) and an electrode(311) of the upper pole plate. The rotor(10) includes an axis(12) and a rotor magnet(11). The axis(12) of the rotor(10) passes through the axis tube(20). The bobbin(300) is fitted to the axis tube(20) and wound by coils. The upper pole plate(310) is mounted on a first surface of the bobbin(300) and includes a plurality of electrodes(311). The lower pole plate(320) is mounted on a second surface facing with the first surface of the bobbin and includes a plurality of electrodes(321). The electrode(311) of the upper pole plate are aligned to meet the corresponding electrode(321) of the lower pole plate(320) in axis direction so as to reduce a magnet flux among the rotor, the upper pole plate(310) and the lower pole plate(320).
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