Thermochromic writing instrument having a movable friction part at the pen tip

Abstract

This article has a hollow structure in which an erasing part for erasing writing surrounds the pen writing part at the pen tip. The erasing part is integrated with the pen support part and is a dynamic design that can slide inside the shaft cylinder from behind the pen writing part towards the pen tip more than the pen writing part. Also, the erasing part can be attached to and detached from the pen support part.

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