| 摘要 |
PROBLEM TO BE SOLVED: To block a rear end opening part of a refill storing ink and an ink back flow preventive agent, and a rear end opening part of a barrel with one tail plug without increasing the number of parts. SOLUTION: A refill 1 wherein a pen point part is provided to a tip, and ink and an ink back flow preventive agent are contained in an ink storing part, is inserted into a barrel 8. A tail plug 15 is stationarily attached with a stationarily attaching part to a rear end opening part of the barrel. A rear end opening part of the refill 2 is blocked with a plug part 17 projected toward the pen point part provided to the tail plug. Then, an air communication hole communicating a rear space part of the ink back flow preventive agent of the refill to an outside of the barrel is provided to the plug part. |
