Reversible permanent magnet synchronous minitype motor

The utility model discloses a reversible permanent magnetic synchronous miniature motor, which is matched with recreation equipment, entertainment equipment and body building equipment such as full automatic mahjong machines, etc. The utility model is composed of a machine casing, a stator assembly, a rotor assembly and a transmission and speed changing mechanism. The utility model is characterized in that the surface of a rotor body is provided with a permanent magnet with high strength for increasing torque; the transmission and speed changing mechanism which is provided with a traditional intermediate gear with a single forced side is improved into a speed changing mechanism with a plurality of groups of gears which have three upright and foots and are forced symmetrically, and thus, the rotary speed of the utility model is smooth, noise is reduced, the damage of teeth of gears is reduced and a failure rate is effectively reduced. The utility model is an ideal matching drive motor for recreation equipment, entertainment equipment and body building equipment such as full automatic mahjong machines, etc.