| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a straight part of a spring from being caught by the inner face of a holder, when the spring is inserted into the holder. <P>SOLUTION: The ball-point pen is equipped with a tip main body 2, the holder 3, and the spring 4 and the holder 3 retains the rear part of the tip main body 2. The spring 4 has a straight part 41 to be inserted into the tip main body 2 and a coil part 42 to be monolithically connected to the rear end of the straight part 41 and arranged at the rear part of the tip main body 2. Inside the holder 3, a fitting hole 31 for the tip main body 2, a communicating hole 32 which communicates with the fitting hole 31 and an ink circulating hole 33 which communicates with the communicating hole 32, are formed. At the tip of the ink circulating hole 33, a conical face-shaped tapered part 33 is formed and the angle of the tapered part 33a is set at 5 to 90°. <P>COPYRIGHT: (C)2003,JPO |
