BALLPOINT PEN TYPE WRITING UTENSIL

摘要

PROBLEM TO BE SOLVED: To provide a ballpoint pen type writing utensil, in which the lowering of a writing performance is checked and, at the same time, the breakage of a pen point is prevented from developing even under the condition that the grade of a penholder is large, the assembling of which is easy structurally and in which leakage of ink can be prevented from developing.;SOLUTION: A second ink flow passage 12, the diameter of which is made to be smaller than that of a first ink flow passage 11, is connected with the first ink flow passage 11 at its tip under the condition that the axis line S2 of the second ink flow passage 12 is parallel with the center axis S1 of a barrel 2 and, at the same time, the axis line S2 of the second ink flow passage 12 is arranged so as to pass through the region of a ball 6.;COPYRIGHT: (C)2007,JPO&INPIT