| 摘要 |
PROBLEM TO BE SOLVED: To prevent back-flow or direct flow phenomena of ink by connecting a writing body to a front of each of a pair of sliding bodies and constructing the pair of sliding bodies such that leading ends of the respective writing bodies can be extended from and retracted into leading apertures of cylindrical shafts interlockingly with the sliding bodies while being centred so as to protrude from the leading apertures. SOLUTION: When a rear shaft 39 is rotated in one direction relative to an intermediate shaft 30, projecting portions 51a, 51b of sliding bodies 48a, 48b are caused to slide along a cam groove 35 in conjunction with the rotation of a rotating shaft 33, with one of sliders being advanced while the other being withdrawn, thereby making it possible to allow a writing leading end portion of the writing body on the advancing side to protrude from a leading aperture of a front shaft 58. In addition, even if an ink storage portion of a writing body such as a ball-point pen is of a non-deformable type, the leading end portion thereof can be deviated toward a centring direction relative to a leading aperture, and in addition, since the front shaft is caused to transition like an elongated cylinder toward the leading end aperture, the operation thereof is not disturbed and therefore the writing leading end portion can smoothly be extended from and retracted into the leading end aperture of the front shaft 58. |
