| 摘要 |
Cores (202, 203) for winding an ink ribbon comprise a hollow cylinder portion (a), a center hole (206) formed inside the hollow cylinder portion (a), a recess portion (205) formed in the upper end of the hollow cylinder portion (a), and clutch portions (207) provided protrudingly on the recess portions (205), extending radially from the center hole (206) and provided with taper faces. The end of the tapered portion of the clutch portion (207), at the upper end of the core, has a thickness smaller than the base part on the recess portion, and the part on the center side of the core has a thickness smaller than the part on the outer periphery side of the core, so that the tapered portion of the clutch portion (207) is inclined with respect to the direction perpendicular to the recess portion.
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