It has with the opposite stopping ball which compared to the production methodological null writing ball and the aforementioned writing ball of the ball-point pen

摘要

PROBLEM TO BE SOLVED: To provide a ball-point pen tip by which fading such as an impact fading is suppressed to a minimum even when air enters inside by writing facing upward or an impact or the like, also, a ball-point pen can quickly return to a normal writing, and in addition, the manufacturing cost can be suppressed.;SOLUTION: A writing ball 2 and a reverse stopping ball 7 which are incorporated in this ball-point pen tip 3 are closely arranged with a small gap, and the volume of the internal space is made small. Thus, even when air enters the inside from a caulking part 21, the volume of the air accumulated inside is small, and the elimination of an air reservoir can be quickly performed. Also, both of the writing ball 2 and the reverse stopping ball 7 can be set on the distal end side of the ball-point pen tip 3. Therefore, at the time of the assembly, the turning over of the ball-point pen tip 3 is not required, and the assembly work becomes easier.;COPYRIGHT: (C)2004,JPO