| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a writing device capable of securely preventing ink leakage from a penpoint by eliminating air entrainment, readily replacing ink tanks without producing dusts in the penpoint and readily checking the amount of the ink remaining in the tank by the tank having flexibility. <P>SOLUTION: The writing device has: a piston body 20 that moves back and forth along with a pen core 10 and where a communicating conduit 20a for communicating the pen core 10 with a storage space part 22 and a locking part 28 locked in a valve body 26 in an ink supply mechanism 14; the valve body 26 that has a lockable structure (a recessed groove 26c) in the locking part 28 of the piston body 20 and that opens and closes an ink side opening 22a of the storage space part 22 by the longitudinal movement; a first spring body 30 for biasing the valve body 26 in a direction of closing the ink side opening 22a; and a unlocking part 32 for unlocking the unlocked state between the locking part 28 of the piston body 20 and the valve body 26. <P>COPYRIGHT: (C)2012,JPO&INPIT |
