Patent ID: 7490791

Claim:
An improved reel structure comprising: a base having two openings, an axial pillar on the base, a column spaced apart from the axial pillar, a plurality of plugs on the base, a support with a groove disposed in a middle of the base, and a bulged ring on the base; a substantially V-shaped spring; a movable arm assembly including a movable arm with an axial hole in a lower portion of the movable arm and equipped with a spring arm and a stud on one side of the movable arm; a clasper with a concave middle portion and including a plurality of fastening holes corresponding to the axial pillar, the column and the plugs; a rotating disc with an axial center hole and including a surrounding wall disposed on an upper portion of the rotating disc for accommodating two cords in the manner that the two cords being rolled along the outside of the surrounding wall in a same direction, wherein the rotating disc further includes a coil spring positioned in a middle of the surrounding wall, a bugled ring and a bugled track assembly disposed at a middle bottom of the rotating disc, the bugled track assembly including two cambered movable tracks, two concave switchable tracks and two bumps connected therewith, the switchable track having a counter surface for pushing; and a cap with two openings; wherein the axial pillar on the base is inserted into the axial hole of the movable arm assembly, one end of the spring is attached to the column of the base, and the other end is coupled to the stud disposed on the spring arm of the movable arm assembly; the fastening holes of the clasper respectively mate with the axial pillar, the column and the plugs, so as to avoid separating the movable arm assembly from the spring and to allow some movement therebetween; the support on the base is inserted into the axial hole of the rotating disc such that the rotating disc is rotatable about the support; an inner portion of the coil spring disposed in the middle of the surrounding wall on the rotating disc is inset in the groove of the support; and the cap substantially covers the base, the cords extending from the openings of the cap and the openings of the base.