| 摘要 |
PURPOSE: To smoothly press inject a member for a writing instrument to the opening of a barrel without damage. CONSTITUTION: An annular protrusion 4 is provided on the inner periphery of the opening 11 of a barrel 1. On the other hand, an annular straight surface 5 and a tapered surface 6 are provided on the outer periphery of the member 2 for a writing instrument. After the surface 6 is brought into contact with the protrusion 4, the surface 5 is held in pressure contact with the protrusion 4. |
