Driving shaft mechanism for ratchet wrench

A driving shaft mechanism for a ratchet wrench built as a spindle assembly of the ratchet wrench for driving an external fixing element to rotate in either direction and providing illumination, the driving shaft mechanism comprising:

• a shaft having a hollow through hole therein and being configured to combine and thereby drive the external fixing element;
• a spindle being installed in the through hole and having:
• a post having a lamp and two electric pins attached to the lamp, and
• a containing part that defines a hollow chamber and has an open end opposite to the post and a conductive recess dented on one side wall of the containing part for accommodating a switching circuit, wherein the electric pins are electrically connected to an inner bottom of the containing part and the switching circuit, respectively;
• a ball received in a ball recess dented on the lateral side of the post and one positioning hole is provided on the shaft corresponding to the ball;
• a spring sleeved outside the post and retained in the through hole for providing a resilient force to the spindle in order to make the ball enter the ball recess or expose outside of the positioning hole in order to provide or not to provide the external fixing element;
• at least one battery provided in the containing part that has one of two electrodes electrically connected with the electric pin that is connected to the inner bottom of the containing part;
• a spindle cap which is axially positioned outside the containing part and exposes atop the shaft when being screwed on the open end of the containing part;
• and
• a switch being provided between the open end of the containing part and an interior of the spindle cap, and being electrically connected between the other electrode of the battery, wherein the spindle cap can screw on one open end of the containing part and thus produce axially movement, and the switching circuit to be pressed or released by the spindle cap, so as to control the switching circuit to turn on or off the lamp.