| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a retractable writing utensil, either the tip writing part of which does not touch the rear surface of a sealing lid or easy extending operation of which is performed. <P>SOLUTION: In the retractable writing utensil, in the barrel of which a retractable and extendable writing utensil is provided and the sealing lid and a sealing cylinder part of which tightly close the writing part of the writing body in interlocking with the back and forth action of the writing body, the sealing lid and a guide tube fixed to the writing body are connected together with a plurality of fine thread parts and, at the same time, each fine thread part consists of an easily deformative portion and a hardly deformative portion and further the sealing tube part is opened or closed by the sealing lid through the forward and backward motion of the fine thread parts. <P>COPYRIGHT: (C)2007,JPO&INPIT |
