| 摘要 |
PURPOSE:To provide an end face tight writing implement capable of adsorbing pressure change to be caused by attaching/detaching of a cap. CONSTITUTION:At a back of a tapered head 4a of an axial tip 4 to be inserted into a tip of a writing implement body, a tail cylindrical part 4b to be inserted into a tip of a flow control body 3 is protruded. On the outer periphery of the tip of the tail cylindrical part, an umbrella-shaped part 5 which is connected to the tip of the body and tapered toward a pen tip 7 is provided. The tip face of the umbrella-shaped part 5 is made to have a diameter a little larger than that of the back end of the tapered head 4a and a smooth face. Thus, vent holes which communicate with an air flow passage A of the writing implement body 1 are formed. In a cap 2, a bag-like elastic internal cap 8 which is in fast contact with the tip face of the umbrella-shaped part 5 and covers a forward part of the umbrella-shaped part 5 or a cylindrical elastic internal cap 8 which blocks the tip part at the holding part of the cap 2 is provided so as to make the vent holes of the internal cap 8 and the axial tip 4 communicate with each other. |
