Thermochromic writing instrument

摘要

A thermochromic writing instrument contains a thermochromic ink, wherein a writing body is accommodated in a barrel movably in a longitudinal direction, an operation portion is provided on the outer surface of the barrel, a pen tip of the writing body is constituted so as to be projectable/retractable from/into a front-end hole of the barrel by operating the operation portion, the thermochromic ink is contained in the inside of the writing body, the pen tip capable of ejecting the thermochromic ink is provided at the front end of the writing tool, and a friction portion capable of thermally changing the color of the handwriting of the thermochromic ink by the frictional heat generated when the handwriting is rubbed with the friction portion is provided on the outer surface of the barrel.

主权项

1. A thermochromic writing instrument containing a thermochromic ink, comprising:
a barrel; a writing body accommodated in the barrel so as to be movable in a longitudinal direction, the writing body being configured to contain the thermochromic ink; an operation portion provided on an outer surface of the barrel; and a friction portion provided on the operation portion, the friction portion being configured to thermally change color of the handwriting of the thermochromic ink by the frictional heat generated when the handwriting is rubbed with the friction portion, wherein a pen tip of the writing body, configured to eject the thermochromic ink, is adapted to be project/retract from/into a front-end hole of the barrel by operating the operation portion.