| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermal color changing writing utensil having thermal color changing ink integrated therein, by which even when one can only use one hand, one can quickly change into a writing condition (projected pen point position) or into a storage condition (sunken pen point position), and furthermore, after writing, with keeping the condition of holding the shaft tube in one hand and without greatly changing the holding condition of the shaft tube, one can quickly move forward to the friction color changing work. <P>SOLUTION: At least one writing core body 6 and at least one friction core body 7 are contained inside the shaft tube 2 free to move in forward and backward direction. The thermal color changing ink 63 is contained inside the writing core body 6. At the nose of the writing core body 6, a pen point 61 for delivering the thermal color changing ink 63 is placed. At the nose of the friction core body 7, a tip 71 that rubs against the handwriting of the thermal color changing ink 63 and thermally changes color of the handwriting by the frictional heat is placed. A piston mechanism that can move selectively the pen point 61 of the writing core body 6 and the tip 71 of the friction core body 7 in and out of the nose hole 31 of the shaft tube is provided. <P>COPYRIGHT: (C)2009,JPO&INPIT |
