| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermochromic writing utensil which allows stable frictional operation using a friction portion of an operation part.SOLUTION: A writing body 3 storing thermochromic ink inside is housed in a barrel 2 so as to be movable in the longitudinal direction, so that a pen point 31 of the writing body 3 can protrude and retract through a front end hole 21 of the barrel 2. The writing utensil includes a pen point drying prevention mechanism 8 which closes the front end hole 21 in accordance with backward movement of the writing body 3 and seals the pen point 31 in a pen point recessed state in the barrel 2. The writing utensil further includes a protruding and retracting mechanism which protrudes the pen point 31 to the outside through the front end hole 21 by protruding the operation part 7 backward from the rear end of the barrel 2 and pressing the operation part 7 forward. The friction portion which can thermally discolor handwriting by the thermochromic ink by friction heat generated when rubbing the handwriting therewith is provided on the outer surface at the rear end of the operation part 7. A grip portion which can be grasped in the friction using the friction portion is provided on the outer side surface of the operation part 7. |
