| 摘要 |
<P>PROBLEM TO BE SOLVED: To omit a process for separately attaching a grip member of a writing instrument to a barrel; to prevent swelling deformation and deterioration from being caused by a fat content of fingers in use; and to make a feeling of grip in use good by possession of structural flexibility. <P>SOLUTION: A structure of a grip part comprises: a grip barrel part of the barrel of the writing instrument, which is molded of a thermoplastic resin material; and the grip member which is integrally molded by two-color molding in such a manner that an elastomer resin is used for the grip barrel. The grip member is composed of an outer peripheral cylinder part and many ribs which are integrally elongated inward from the outer peripheral cylinder part; and many tubular vacant chambers are formed of the outer peripheral cylinder part, the many ribs, and the grip barrel part of the barrel part, which is integrated by the two-color molding. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
