| 摘要 |
PROBLEM TO BE SOLVED: To provide the installation structure of a head crown or a tail crown, an axial length of the engaging part of which is not limited and, further, and an interval from the position of a writing body or of a retraction and extension mechanism in the members of a writing utensil is necessary. SOLUTION: A projecting part is formed on the bottom surface of the head crown or of the tail crown at a position offset to the center line of a barrel. At the same time, an engaging hole engaging with the projecting part is formed at a position opposite to the projecting part at the end part of the member of the writing utensil, to which the head crown or the tail crown is installed, so as to install the head crown or the tail crown by engaging the projecting part with the engaging hole. |
