Rotation type of writing materials having polygonal section lead

摘要

The subject innovation relates to a take-type drawing rotation having a structure in which in the take-off rotation with plant expression drawing of the polygonal cross sectional shape, can be easily separated from the cap member from the body. Drawing according to the present invention comprises: a female screw portion to both end portions the cylindrical body 1, which is 3 is formed on an inner peripheral surface and the spiral groove 2 is formed; And the number of spirals the spiral projection 12 on the outer peripheral surface so as to move along the grooves (2) are formed, the polygon drawing shim 13 are a pair of movable body 11 are respectively press-fixing of the body (1); The body (1) a cap member (4) screwed to both ends being circular grooves (7a) is formed on the outer end side of the opening 7 of the; Said circular polygon drawing shim 13 fixed press-fitted to the groove (7a) is bonded to have a circular-arc projection (9) moving along the circular groove (7a), the moving body 11 of the cap member (4) having a polygon with a through the through-holes 8, which comprises a rotating member (5).