Telescopic writing tools

The utility model discloses to a retractable writing tool, which mainly solves the problems of un-convenient to carry and uncomfortable to use of the existing technique. The utility model comprises a pen core, the front of which is pen-point, a pen holder, the front of which is opened and the pen bar contains the pent core, a sliding block arranged at the back of the pen core and being able to slide along the inner cavity of the holder, a connection bar, one send of which is connected with the sliding block, a build-in gear installed inside the pen holder, the off- axis mass is connected with the connecting rod pivot mass and an external gear matching with the build-in gear and arranged inside the pen holder. Through partial axis connecting of the connection bar and the rotary built-in gear, the rotation of the build-in gear can be changed to linear movement along the pen holder. By employing the structure, the utility model is convenient for carrying, and when used, the utility model can provide people with more comport.