| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce manufacturing cost in a thermochromism writing utensil which is equipped with a rear end knock-type retraction mechanism having a friction part. <P>SOLUTION: This thermochromism writing utensil is equipped with a retraction mechanism which accommodates a thermochromism ink inside a writing body 5 which is movable forward/backward inside a barrel 2 and projects an knock portion 8 backward from a rear end hole 41 of the barrel 2, and further, can retract a pen point 51 from a forward end hole 31 of the barrel 2 by pressing the knock portion 8 forward from a state in which the pen point 51 is retracted. A part or the entirety of the barrel 2 is constituted of an elastic material, and a friction part 10 which can thermally discolor a handwriting obtained using the thermochromism ink with a friction heat, is constituted of the part made up of the elastic material. <P>COPYRIGHT: (C)2011,JPO&INPIT |
