| 摘要 |
An ink pen for a writing board is provided to prevent the ink from leaking by cutting off the leakage of the ink by moving a valve rod forward when a nib core is fallen from the writing board. An ink pen for a writing board is composed of: an empty cylinder-shaped pen body(10) for storing the ink; a nib core support member(30) protruded at the front end of the pen body; a rod-shaped nib core(20) receiving the ink and writing letters, wherein a front end of the nib core is exposed through the nib core support member; and a valve unit combined with the front end of the pen body to allow the ink to be supplied to the nib core selectively. When a user writes down by bringing the front end of the nib core into contact with the writing board, the valve rod moves backward in the predetermined distance(S) and allows the ink to be discharged. If the nib core is fallen from the writing board, the valve rod moves forward by elastic returning power of a coil spring to cut off the outflow of the ink. |
