| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cap for a writing implement structured to dispose an inner cap having an air hole, inside an outer cap and to block/open the air hole with a packing member disposed in the outer cap by mounting/detaching the cap to/from a shaft cylinder, allowing the inner cap to smoothly move forward and backward relative to the outer cap to surely block/open the air hole while narrowing an outer diameter around the tip portion of the outer cap. <P>SOLUTION: The cylindrical packing member 28 with one end 28a provided as an expansion part 29 expanded outward in the outer diameter and inner diameter is fixed to a connecting thread member 8 so that the expansion part 29 is the free end. A coil spring 32 energizing the inner cap 5 backward is inserted through the inside of the packing member 28, and one end of the coil spring 32 is fixed to a tip part 5a of the inner cap 5 so as not to block the air hole 30 provided at the tip part 5a, while the other end abuts on the connecting thread member 8. <P>COPYRIGHT: (C)2010,JPO&INPIT |
