| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermochromic ballpoint pen including thermochromic ink and having a friction part formed at the rear end of a ballpoint pen body, while thermally discoloring the handwriting of thermochromic ink by scratching even when a cap is fitted to the back, in regard to the thermochromic ballpoint pen containing thermochromic ink and provided with a friction part at the rear end of a ballpoint pen body.SOLUTION: The thermochromic ballpoint pen 1 includes a refill that stores thermochromic ink inside and has, at one end, a pen point from which thermochromic ink is ejected, and the cap 4 to be put on the side of the pen point of the ballpoint pen body 2 and opened at both ends. When the cap 4 is put on the side of the pen point, the pen point is located inside the cap 4, and when the cap 4 is put on the back, the friction part 3 projects from an opening of the cap 4. The cap 4 and the ballpoint pen body 2 are provided with fixing means to prevent the cap 4 from moving during the frictional operation. |
