| 摘要 |
PROBLEM TO BE SOLVED: To secure the liquid denseness of an elastic valve and a peripheral component and control the defective release of an ink through-hole by forming integrally the elastic valve with a synthetic resin peripheral component being in contact with the elastic valve. SOLUTION: An elastic valve 7 is formed integrally on the end of an ink tank 1. The elastic valve 7 is constituted of a base 7a with bonding leg sections 7b of the ink tank 1 and a deformed platen section 7c forming a slit-shaped ink through-hole 7d, and disposed in a front shaft inner hole 2b while being in contact with the inner wall of a front shaft. A pen point 8 is disposed slidably in the inner hole 2b of the front shaft 2 while the end of the pen point is protruded, and the pen point 8 is slid to deform elastically the platen section 7c of the elastic valve 7 and release the ink through-hole 7d. As the unnecessary external force is not applied to the ink through-hole 7d by the arrangement to make the defective release of the ink through-hole 7a hard to be generated. Also the liquid denseness between the ink tank 1 and the elastic valve 7 can be secured. |
