Shock absorber having quick release fastening device

A shock absorber comprising:

• a threaded rod;
• a top positionally limiting seat disposed at an end of the threaded rod;
• a bottom seat disposed at another end of the threaded rod, the bottom seat having a top end facing toward the top positionally limiting seat;
• a spring sleeved onto the threaded rod, the spring having an upper end and a lower end, the upper end being abutted against the top positionally limiting seat;
• and
• a quick release fastening device comprising:
• a threaded assembly comprising a first threaded member, a second threaded member, and a fastening member detachably fastening the first threaded member and the second threaded member to each other, each of the first threaded member and the second threaded member having an internal threaded surface, the internal threaded surface of the first threaded member and the internal threaded surface of the second threaded member collectively forming a threaded hole and being screwed onto the threaded rod so that the threaded assembly is displaceable on the threaded rod by being rotated, the threaded assembly being abutted against one of the top end of the bottom seat and the lower end of the spring;
• and
• a quick release handle pivotably connected with the threaded assembly in a way that the quick release handle is pivotable between a tightly press position and a release position, when being located at the tightly press position, the quick release handle being fixedly abutted against the first threaded member, when being located at the release position, the quick release handle being adapted for a user to hold the quick release handle to rotate the threaded assembly.