| 摘要 |
PURPOSE: A liquid chalk is provided to supply ink to a chalk tip through a simple manipulation. CONSTITUTION: A liquid chalk comprises: a main body having an ink container; a chalk tip; a valve device controlling a supply of the ink; a cap for protecting the chalk tip; and a refill cap. In one end of the main body(100), a pressure control member(200) is placed for supplying air to inside. A pressure control member is installed in the top end portion of the refill cap(210). The pressure control member has a flow cap(220) which instantly opens or shutdowns in order to expose the refill cap to the outside. |
