YOYO

摘要

PROBLEM TO BE SOLVED: To provide a yoyo of which rotary core is not taken out of a center shaft during play and which is easy to do a maintenance work by disassembling at necessity. SOLUTION: A bearing section 6 is formed at a center of a pair of opposing rotary bodies 1 which has hollows 4 within an interior of the rotary bodies. A shaft section 10 is detachably inserted into the bearing section 6 in such a manner that the shaft section 10 is rotated incorporating a rotation of the rotary bodies 1. The shaft 10 is inserted playing into a thread reeling member 16 that is attached between the rotary bodies 1. Retention device 20 having at least one pair of retention means is provided in the hollows 4 of the interior of the rotary bodies 1. Non-retention section 12 is provided at both edges of the shaft 10 to detachably cramp the non-retention section 12 by a retention section formed on one pair of retention means.