Automatic positioning winder

An automatic positioning winder comprising a lower cover (1), an upper cover (2) fixed to said lower cover (1), a winding device provided between said lower (1) and upper covers (2), entering and outgoing line holes (10, 11) formed in the lateral walls of the lower and upper covers respectively;

• characterized in that:
• said winding device consists of a centre pillar (34) provided in center of an upper portion of the lower cover (1), a turning wheel (4) sleeved on the centre pillar (34), a brake component (50) provided in the upper portion of the lower cover (1) and a vulture spring (6) fixed inside of the turning wheel (4);
• an annular groove (7) having a flat bottom is formed on the bottom portion of the turning wheel (4);
• said annular groove (7) includes a positioning device (8) for forming a guiding groove (9) inside the annular groove (7);
• the brake component (50) has a hook portion (500) moving relatively along said guiding groove (9) as the turning wheel (4) rotating;
• said guiding groove (9) includes a flat bottom and the hook (500) of said brake component moves along the lateral wall of the guiding groove (9) to change its moving direction;
• a circular convex portion (14) and a wedge shape convex portion (15) are provided in the guiding groove (9), forming an outer raceway (17) and an inner raceway (18);
• said circular (14) and wedge shape (15) convex are spaced by an inlet channel (19) and an outlet channel (20), and an end of the wedge shape convex (15) includes a concave opening (21) connecting the outlet channel (20);
• a turning radius (R1) of said inlet channel (19) is greater than a turning radius (R2) of an inner side of a tip end of the opening (21) and a turning radius (R3) of the concave opening (21) is greater than a turning radius (R4) of an inner side of a tip end of said circular convex (14), where is close said outlet channel (20).