Patent ID: 7950311

Claim:
A screwdriver comprising: a main body having a first end adapted for connecting to a tool and a second end; a column projecting from the second end of the main body and having an opening formed therein longitudinally; a linkage having a first end and a second end, with the second end of the linkage slideably received in the opening; a cap member having the second end of the linkage installed therein, with the cap member movable between a first position and a second position; wherein the cap member is coupled to the main body when the cap member is in the first position; wherein the cap member is detached from the main body along the linkage as the cap member is moved toward the second position; a locking member provided between the cap member and the main body and selectively fixing the cap member to the main body in the first position; and a first elastic element for pushing the linkage outwardly with respect of the main body.