| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ballpoint pen tip of a simple structure which has a ball seat, and is configured to supply a large amount of ink to a ball. <P>SOLUTION: The ballpoint pen tip includes a tip body having an ink flowing hole formed in the center of the bottom wall of a ball holding chamber and a plurality of ink flowing grooves extending radially from the ink flowing hole and not reaching a rear hole, and is configured by inserting the ball into the bottom wall to caulk the leading end of the tip inward, and projecting a part of the ball from the leading end edge of the tip to hold the ball freely rotatably. The ink flowing hole includes communicating grooves which communicate with the ink flowing grooves and the rear hole, and are smaller in circumferential width than the ink flowing groove. <P>COPYRIGHT: (C)2012,JPO&INPIT |
