To provide a stationery capable of substantially constantly keeping a medium supply pressure for pressurizing the interior of a medium storage pipe by means of a pressurizing pump mechanism from the beginning of usage to the end of usage, thereby, stabilizing the ejection amount of a medium upon usage, stabilizing the quality upon usage and, at the same time, enhancing quick response for a pressure change in the medium storage pipe that is pressurized and adjusted in accordance with the amount of consumption of the medium.
A pressure adjustment mechanism 27 configured so as to substantially constantly keep pressurizing force in the opening back end part of an ink storage pipe 6 upon knock operation is disposed between the opening back end part 6b of the ink storage pipe 6 in a body shaft cylinder 2 and a pressurizing pump mechanism 16. The pressure adjustment mechanism comprises: an air passage 25 disposed between the opening back end part of the ink storage pipe and the pressurizing pump mechanism so as to communicate with them; an air accumulation part 28 disposed so as to communicate with the air passage; and an energizing means 30 for energizing the air accumulation part in the crushing direction so as to be a crush-deformation state in the air-passing state of the pressurizing pump mechanism upon the non-usage.
| JP2006123354 | APPLICATOR |
| JP2008044338A | 2008-02-28 | |||
| JP3096772U | 2003-10-03 | |||
| JPS49147025U | 1974-12-19 | |||
| JP2010017992A | 2010-01-28 |
Noritsugu Nakama
Hiroyuki Mori
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