Movable mechanical doll

A movable mechanical doll comprising:

• a bottom seat (10) having a circuit board installed therein, and two legs (11) upright formed thereon;
• a shoulder-arm part (20) mounted at tops of the legs (11), said shoulder-arm part (20) having a seat (21) mounted on said legs (11), two pivoting ears (22) formed at a center of said seat (21) and parallel to each other, a pivot pin (23) inserted through said pivoting ears (22), two blocks (24) each with an inclined upper surface (241) formed at two sides of said seat (21), a guide plate (25) mounted at a rear side of said seat (21) and having an elongated slot (251) longitudinally defined through said guide plate (25);
• and
• a housing (30) covering said shoulder-arm part (20) and pivotally mounted to said pivoting ears (22) by said pivot pin (23) extending through said housing (30), said housing (30) having two arm openings (34) respectively defined at two sides thereof, a driving assembly (26) mounted in said housing (30) and at the rear side of the seat (21), said driving assembly (26) having a first motor (261) controlled by said circuit board in said bottom seat (10), a wheel (262) driven by said first motor (261), and a first lug (263) eccentric to the wheel (262) formed at a surface of the wheel (262) facing the guide plate (25) and inserted in the elongated slot (251), two hinges (27) mounted in said housing (30) and adjacent to the arm openings (34), two arm joints (28) pivotally mounted on the hinges (27) respectively, each arm joint (28) having a first shaft (281) abutting the respective inclined upper surfaces (241) and supported by the respective block (24), and two arms (29) respectively installed at outer sides of said arm joints (28) and extending from said arm openings (34).