| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress adhesion and deposition of ink onto an outer surface of a ball holder, and to prevent ink dropping even in the state that a ball advances and a gap between the ball and the ball holder cannot be sufficiently ensured such as when a pen point is largely slanted and writing is performed. <P>SOLUTION: The ballpoint pen tip includes at least, the ball as a writing member, and the ball holder holding the ball partially protruded from an end opening, and a ball slipping-out preventive part 5 capable of being circumferentially abutted to the ball is formed on an inner side of an end side part of the ball holder, and a ball holding part 4 holding the ball is formed, and a diameter enlargement part 6 is formed on the end side relative to the ball slipping-out preventive part, and a step part 7 is formed on the diameter enlargement part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
