| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a protrusion on the surface of a barrel, and to enable proper writing to be performed over a long period of time by relatively turning a writing body and a protrusion. <P>SOLUTION: The writing body is provided inside the barrel 1 of the writing instrument; the protrusion is provided on the surface of the barrel 1; and the writing body and the protrusion is put into a relatively turnable state. <P>COPYRIGHT: (C)2007,JPO&INPIT |
