| 摘要 |
PURPOSE: To provide a writing tip section which can receive a large sinking force in a writing instrument, can be manufactured economically, and can be assembled easily. CONSTITUTION: A writing tip section has an annular groove 8 in the longitudinal center. A longitudinal rib 10 which is shape-connectively engaged with the annular groove 8 is provided at the front opening 3 of a writing tip section holder. The longitudinal rib is not deformed by a sinking force generated at the writing tip section 4 in writing, and can be deformed only in assembling. |
