Quick release fastening device and assembly of quick release fastening device and outer tube

A quick release fastening device comprising:

• a threaded ring comprising a ring-shaped main body, the ring-shaped main body comprising an outer surface, an inner threaded surface, a threaded hole defined by the inner threaded surface, at least one groove located on the outer surface, and at least one radial through hole located in the groove, the radial through hole communicating with the threaded hole;
• and
• at least one fastening unit comprising:
• a stuffing block comprising a threaded surface, the stuffing block being disposed in the radial through hole in a way that the stuffing block is movable along a radial direction of the threaded hole, the threaded surface of the stuffing block facing toward the threaded hole;
• and
• a quick release handle pivotably connected with the threaded ring in a way that the quick release handle is pivotable between a press position and a release position and located in the groove, when being pivoted from the release position to the press position, the quick release handle pushing the stuffing block toward the threaded hole.