Wire-winding device

A wire-winding device assembly comprising:

• cover means defining a receiving space;
• a rotary base assembled to the cover means and disposed in the receiving space in a rotatable manner;
• a spiral spring forming two sections respectively fastened to said cover means and said rotary base, respectively, so as to constantly urge the rotary base to move back to an original position;
• an annual track formed in the rotary base and defining a latching position thereof;
• a positioning element associated with said cover means and includes a guiding protrusion moving along said annual track and to resist backward rotation of the rotary base when the guiding protrusion is moved to said latching position;
• and
• a transmission wire winding around the rotary base;
• wherein
• said rotary base forms a cylindrical structure with a spacer on an exterior surface thereof to divide the transmission wire into upper and lower levels;
• wherein
• one end of the transmission wire extends out of the cover means via the upper level while the other end of the transmission wire extends out of the cover means via the lower level.

A wire-winding device assembly comprising:

• cover means defining a receiving space;
• a rotary base assembled to the cover means and disposed in the receiving space in a rotatable manner;
• a spiral spring forming two sections respectively fastened to said cover means and said rotary base, respectively, so as to constantly urge the rotary base to move back to an original position;
• an annual track formed in the rotary base and defining a latching position thereof;
• a positioning element associated with said cover means and includes a guiding protrusion moving along said annual track and to resist backward rotation of the rotary base when the guiding protrusion is moved to said latching position;
• and
• a transmission wire winding around the rotary base;
• wherein
• said rotary base forms a cylindrical structure;
• wherein
• the rotary base forms a wire space inside the cylindrical structure, and an inner section of the transmission wire is received in the wire space;
• wherein
• the rotary base forms a smoothly curved bulged surface transversely facing an outlet beside the curved wire space so as to smoothly regulate extension of the transmission wire from the wire space to an exterior surface of said cylindrical structure.