Patent ID: 7677138

Claim:
A ratchet screwdriver comprising a handle comprising a body having a front end; a rear end; an inner surface; a receiving chamber being defined in the body at the rear end; and a front through hole being defined through the body and communicating with the receiving chamber; a ratchet being mounted securely in the receiving chamber; a shaft being mounted rotatably in the front through hole of the body and securely on the ratchet and having a proximal end being connected to the ratchet; and a distal end protruding out from the front end of the body and having a polygonal keyed socket formed axially in the distal end; a finger ring being mounted securely around the distal end of the shaft and being smaller than the body; and a tool being selectively mounted securely in the shaft and having a polygonal proximal end mounted in and corresponding to the keyed socket of the shaft, wherein the distal end of the shaft further has an annular groove being defined around the distal end and having a bottom; and a conical hole being defined through the bottom of the annular groove and communicating with the keyed socket of the shaft; and the finger ring is mounted securely around the annular groove of the shaft and further has an inner surface; a ring groove being defined in the inner surface of the finger ring and corresponding to the annular groove of the shaft; a threaded hole being defined through the finger ring; a bolt being mounted through the threaded hole and abutting against the annular groove of the shaft; a positioning ball being mounted in the conical hole and protruding from the keyed socket of the shaft; and a spring being mounted between the positioning ball and the ring groove of the finger ring.