| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multicore type writing utensil preventing a knock member from being drawn from a window hole without changing the thickness of a shaft cylinder. <P>SOLUTION: The multicore type writing utensil includes a cylindrical shaft cylinder 12 having the center axis X, a knock member 18 arranged in the shaft cylinder, first projecting pieces 27 formed on both side faces of the knock member and projected from the knock member in the direction orthogonal to the center axis, a guide rail 31 which is provided on an inner wall of the shaft cylinder and guides the sliding movement of the knock member from the rear end position to the front end of the shaft cylinder along the center axis, and has an inner rail 32 engaged with the first projecting piece to regulate the movement of the knock member inwardly in the radial direction orthogonal to the center axis, and second projecting pieces 28 formed on both side faces of the knock member, and projected from the knock member in the direction orthogonal to the center axis while the inner rail is arranged between the first and second projecting pieces, and the second projecting piece 28 being engaged with the inner rail to regulate the movement of the knock member outwardly in the radial direction orthogonal to the center axis. <P>COPYRIGHT: (C)2013,JPO&INPIT |
