| 摘要 |
It is intended to reduce the force of contact of a cap with an elastic member provided on the outside of a cylindrical shell and thereby permit smooth mounting and removal of the cap. In a writing tool having on the outside of a cylindrical shell 1 an elastic member 5 of a different material from the material of a cap 2, a plurality of longitudinal ribs 4 extending along the cylindrical shell are formed on the inner peripheral surface of a cap portion 2-1, whereby the operation for fitting the cap portion 2-1 on the cylindrical shell 1 and the operation for pulling it out from the same shell can be done smoothly.
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