| 摘要 |
PROBLEM TO BE SOLVED: To provide an airtight-type writing instrument with a seal part for sealing a writing tip, which reduces a contact part of the seal part and which prevents generation of an imitation sound during an operation.SOLUTION: A writing body 3 is inserted into a body 1 in such a manner as to advance/recede. A seal part 4 for sealing a tip part of the writing body is provided within the body. The writing body, which is provided with a sealing projecting part 60, abuts on a sealing inner-surface protrusion 74 of the seal part when it is in a receding position. The seal part 3, which can move forward/backward, is urged forward by a spring 72. |
