Reel-based tightening device

Reel-based tightening device comprising:

• a housing case defining a housing seat,
• a spool housed rotatable around a first rotation axis and in said housing seat and provided with an annular groove to allow winding of a traction cable,
• a knob assembly rotatably mounted on said housing case around a second rotation axis parallel to said first rotation axis and operatively connected to said spool through drive means,
• locking means configured to lock the rotary position progressively achieved by the spool by rotating the knob assembly so as to obtain the gradual winding and unwinding of the cable around said spool,
• selective release means which can be actuated by a user to free the rotation of said spool and allow a quick release of the cable,
• wherein said selective release means are adapted to selectively cooperate with said locking means being movable between a first position, neutral with respect to said locking means, wherein they allow the progressive locking of the rotary position of the spool together with said knob assembly allowing the gradual and controlled winding/unwinding of the cable, and a second position, wherein they disable said locking means to free the rotation of said spool together with said knob assembly and allow the quick release of the cable, retaining means being provided to stably retain said selective release means in said second position.