Patent ID: 7168967

Claim:
An improved hub including a socket, a cap, two rotating discs, a reel, and a button switch device, wherein the improvement comprises that one of the rotating discs includes a reel trench therein, a protruding hook support thereon, a connecting axis disposed in the center of the rotating disc to connect with an end of a cable surrounding the rotating disc, and a plurality of ratchets disposed around the periphery of the rotating disc, and the other rotating disc having an axial through hole connected to an end of a cable surrounding the rotating disc, an extended spool having an opening deployed to form a hook support and a plurality of ratchets positioned around a periphery of the rotating disc, wherein the reel trench of the rotating disc is provided for positioning the reel, an end of the reel clasps the hook support of the reel trench, and another end of the reel clasps the hook support of the other rotating disc, the connecting axis of the rotating disc is inserted into the axial through hole of the other rotating disc such that the cables of the two rotating discs are coupled to each other, a resultant structure thereby is arranged over the socket, the button switch device is disposed on a side thereof, and the cap covers the socket, so as to constitute a hub.