Length-adjustable shock absorber

A length-adjustable shock absorber, comprising:

• a tubular body, having one end formed with threads in an axial direction to form a threaded section, the threaded section being interrupted in the axial direction by at least one recessed groove;
• an adjusting cylinder, sleeved on the tubular body, the adjusting cylinder being threadedly connected to the tubular body at a selective height for adjusting a length that the tubular body extends out of the adjusting cylinder;
• wherein a circumferential side of the adjusting cylinder has at least one through hole, the through hole is rotated along with the adjusting cylinder to face the recessed groove, a locking lever is pivotally connected outside the through hole, the locking lever includes a locking portion that is engagable in the recessed groove and a force-applying portion for pulling, and the locking lever is pivotable between a locking position and an unlocking position;
• when the locking lever is pivoted to the locking position, the locking portion passes through the through hole and is engaged in the recessed groove to lock the adjusting cylinder so that adjusting cylinder cannot move axially along the threaded section;
• when the locking lever is pivoted to the unlocking position, the locking portion is disengaged from the recessed groove to unlock the adjusting cylinder.