Mechanical-pencil cap serving as touch-pen tip and pencil-lead sharpener, and mechanical pencil having the same

A mechanical pencil with a mechanical-pencil cap serving as a touch-pen tip and a pencil-lead sharpener,

• wherein, if the mechanical-pencil cap (11) serving as the touch-pen tip and the pencil-lead sharpener is separated from a rear end of the mechanical pencil, is moved to a front of mechanical pencil and a mounting surface of the mechanical-pencil cap (11) when it is mounted on the rear end of the mechanical pencil is fastened to a front end of the mechanical pencil, the mechanical-pencil cap is used as the touch-pen tip, and, if the mechanical-pencil cap (11) is separated from the rear end and a surface opposite to the mounting surface of the mechanical-pencil cap (11) when it is used as the touch-pen tip is fastened to the mechanical pencil, the pencil lead (16) of the mechanical pencil is inserted into the pencil-lead insert hole (11g) defined in the mechanical-pencil cap (11) to be surrounded by the touch-pen tip (11f), so that the mechanical-pencil cap serves as the pencil-lead sharpener by the blade (11d) in the mechanical-pencil cap (11) when either of the mechanical-pencil cap (11) or the mechanical pencil is rotated by an external force.