| 摘要 |
PURPOSE: A sharp pencil capable of adjusting the thickness of a lead is provided to prevent the breakage of the sharp pencil lead when writing by freely adjusting the length of the sharp pencil lead. CONSTITUTION: A sharp pencil comprises the following: a chuck discharging a sharp pencil lead to the outside when pressing a pressurizing unit by moving forward; a tip-end cap(10) including a jamming protrusion operating as a stopper for stopping a sleeve; a case(20) including a protrusion(21) on the upper side, coupled to the tip-end cap; a sharp pencil lead adjusting unit(30) including a groove coupling with the protrusion on the case, with a cylindrical outer shape; a slider(40) including the sleeve for stopping the chuck after discharging the sharp pencil lead, and a screw unit(41) combining with a screw formed on the inside of the tip-end cap; and a lead case(50) for storing the sharp pencil lead inside the slider. |
