| abstract |
(57) [Abstract] [Problem] There is a problem that when an impact is applied to the writing instrument itself, the ink adheres to the inner wall of the writing instrument main body and appears as ink leakage to the outside through the space where air communicates. SOLUTION: In the temporary ink reservoir portion 3, a portion having a large distance between the comb teeth 11 is formed as a weak capillary force portion 15, and the weak capillary force portion 15 has an air opening at the tip of the pen tip holder portion 2. The circulation hole 16 is open. |