| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermochromic writing utencil that can prevent optical deterioration of thermochromic ink and can confirm a residual ink amount nearly complete consumption of the stored ink.SOLUTION: In the thermochromic writing utencil keeping the thermochromic ink 5 stored in an ink storage tube 4 with a pen nib 2, through which the thermochromic ink 5 can be discharged, installed at the front end of the ink storage tube 4, the pen nib 2 is press-fitted and fixed to the front end of a pen nib holder 3, and the rear end of the pen nib holder 3 is press-fitted and fixed to a front end opening of the ink storage tube 4, and the ink storage tube 4 is made of a material having a light-shielding property and a gas non-permeation property; the pen nib holder 3 is made of a transparent resin material; so that the inside of the pen nib holder 3 between the pen nib 2 and the ink storage tube 4 can be seen through from outside. |
