| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a writing utensil that ensures easy attaching and detaching of a tip tube to and from the pen barrel and has the sealability when capped. <P>SOLUTION: In the writing utensil in which the ink stored in an ink chamber 16 in the pen barrel 12 is supplied to the pen core 14 when the pen core 14 is pressed to the axial direction in the state engaged in the tip tube 10, and ink supply to the pen core 14 is blocked by releasing the pressure, the pen core 14 is formed in a non-circular shape in a shaft directional vision with the width larger than the diameter of the barrel tube 12, and the tip tube 10 is attachably and detachably mounted to the pen barrel 12 with the engagement parts 18 (18a, 18b) of two or more locations. <P>COPYRIGHT: (C)2013,JPO&INPIT |
