| 摘要 |
PROBLEM TO BE SOLVED: To prevent ink from penetrating and spreading into a connection part of a ball-point pen refill component.SOLUTION: The peripheral surface of one of the rear end side outer peripheral surface of a chip side tubular component 20 and the front end side inner peripheral surface of an ink storage tube side tubular component 10 is provided with a first annular projection 22a kept in contact with the other peripheral surface over the whole surface and a second annular projection 22b kept in contact with the other peripheral surface over the whole surface at a position away rearward from the annular projection 22a, thereby forming an annular recess 22c covering the whole surface between the first annular projection 22a and the second annular projection 22b, and making the diameter of the projected end of the second annular projection 22b larger than the projected end of the first annular projection 22a.SELECTED DRAWING: Figure 6 |
