Push type pencil sharpener

The utility model provides a push type pencil sharpener, includes urceolus, lead screw, screw mandrel's base, spring, urceolus upper end fixed connection pencil sharpener, the inside lead screw hole that is equipped with the inside groove and is used for passing the lead screw of urceolus, lead screw hole under by the urceolus terminal surface pass the inside groove, the upper end of spring is fixed on the interior roof in lead screw hole, lower extreme and the contact of lead screw top, still include with the screw means of inside groove transmission coordination and separation, screw means arranges the cooperation inslot in, the lead screw passes through screw -thread fit with screw means, the urceolus downstream, screw drive screw means, screw means and inside groove transmission coordination drive the urceolus and rotate, make pencil sharpener rotation work, the urceolus upward movement, screw means and inside groove separation, the urceolus does not rotate. The utility model discloses a spiral principle