WRITING IMPLEMENT, CAP FOR WRITING IMPLEMENT, AND METHOD OF ASSEMBLING CAP FOR WRITING IMPLEMENT

摘要

A writing implement, wherein a tip shaft (5) and an ink tank (4) are integrated or formed integrally with each other as a refill (6), the open end part (20b) of a cap is brought into contact with the tip shaft for fixedly positioning the cap (3) when the cap (3) formed so as to cover the tip shaft is installed on the tip shaft in the state of a rear shaft (7) for storing the ink tank installed detachably on the ink tank, the cap forms a hollow part (22b) for storing a pen tip part (8) therein, the inside diameter of the hollow part is formed larger than the outside diameter of the tip shaft and the outside diameter of the rear end part (7c) of the rear shaft, an inwardly extending shaft locking part (20e) is formed on the inside wall part of the cap along the circumferential direction, the outer peripheral part of the rear end part (7c) of the rear shaft is held by the shaft locking part, an inwardly extending guide part (21j) projectedly provided on the inside wall part of the cap at the tip side of the shaft locking part to restrict the excessive intrusion of the rear end part of the rear shaft into the cap, and the cap is formed so as to be firmly engaged gradually as the clip is slid from a temporary locking position for temporarily locking the hook part (40a) of the clip (40) to the locking part (44) of a cap body (39) along the axis of the clip.