| 摘要 |
PROBLEM TO BE SOLVED: To avoid leakage of an ink from the apex of a ball-point pen tip 10 even when a ball-point pen is left as it is under a condition where the ball- point pen tip 10 faces downward. SOLUTION: The ball-point pen tip 10 is provided with a ball 30 and a holder 20 for holding this ball 30. The holder 20 is provided in the neighborhood of the end part of its one side and has a ball house 40 formed so as to be able to store the ball 30, an ink guiding hole 60 penetrating through from the end part of the opposite ball house 40 side to the ball house 40 and a caulking part 50 provided on the open end part of the ball house 40 side and whose inner diameter is formed smaller than the diameter of the ball 30. The inner peripheral face of the caulking part 50 is planished. |
