| 摘要 |
PROBLEM TO BE SOLVED: To enable a threaded groove (a female thread) to be simply formed on the internal face of an outer barrel, in a feeder device for an eraser or the like using the paired evenness of a thread. SOLUTION: A rack member (8) with a flight part (9) corresponding to a part, in an axial direction, of the female thread, is formed. This rack member (8) is insetted in a receiving groove (6) formed in the internal face of an outer barrel (4). In addition, a male thread (19) to be screwed together into the flight part (9), is formed all around the periphery of a cylindrical part (13) of a receptacle (11) and an inner barrel (10) is installed passing through a bottom part (12). Further, an eraser (14) is mounted on the receptacle (11) and the receptacle (11) is transferred in the axial direction by rotating the inner barrel (10). Consequently, the eraser (14) is retracted into the rear end of the inner barrel (10). |
