| 摘要 |
PROBLEM TO BE SOLVED: To provide a spool case which is capable of firmly fixing a spool and being used repeatedly and where the spool is easily attached or detached. SOLUTION: This case 3 consists of a case main body 1 equipped with a fitting projection 4 which is formed in one piece protruding upward and, where a cylindrical spool 3 is fitted and a lid 2 which is fitted in the outer peripheral wall of the case main body 1, in which the fitting projection 4 is fitted into the cylindrical spool 3 making all its peripheral sides come into contact with the inner circumferential surface of the spool 3. Moreover, the side of the fitting projection 4 coming into contact with the inner circumference of the spool 3 is made into a curved surface. Furthermore, a single curved annular projection 5 is provided to the side of the fitting projection 4. |
