| 摘要 |
PROBLEM TO BE SOLVED: To provide an easily operable writing utensil, the structure of valve mechanisms which is simple and with which no paper surface is stained. SOLUTION: A main ink chamber C1 is provided between a first valve mechanism 30 and a second valve mechanism 40 and a small ink chamber C2 is provided between the second valve mechanism 40 and a writing body 20. The first valve mechanism and the second valve mechanism consist of valve main bodies consisting respectively of large diametral parts 31 and 41, small diametral parts 32 and 42 and blocking bodies 35 and 45, which are respectively fitted onto the small diametral parts in order to block through holes 34 and 44. An air compressing member 50 is connected with the first valve mechanism. By pressurizing through the reduction of the internal volume of the air compressing member, both the first valve mechanism and the second valve mechanism are opened, resulting in shifting the ink in the main ink chamber to the small ink chamber so as to realize a writable state. |
