| 摘要 |
PURPOSE: A slider capable of pneumatically controlling the liquid containment space in the liquid chalk is provided to write with chalks without pressing an apical area of a core. CONSTITUTION: A slider capable of pneumatically controlling the liquid containment space in the liquid chalk comprises a stopper, a hole(21), a slider(23) and a slider groove(22). The stopper is combined in the rear part of a main body. The stopper protects the loss of ink. The hole is formed in the liquid chalk. The liquid chalk has a lid which protects from the ink loss. The hole is formed in the main body. The slider moves the hole in plane of the hole. The slider groove fixes the slider. |
