| 摘要 |
PURPOSE: A coupling device for educational training tools is provided to complete a task coupling an insertion member and nut member through a process inserting and pushing an insertion unit of the insertion member into a hollow of the nut member so that children can effectively use a coupling device due to easy instructions. CONSTITUTION: A coupling device for educational training tools comprises an insertion member(10) and a nut member(20). The hanging protrusion is hung on an insertion protrusion. The insertion member comprises a head(14), an insertion unit(16), and the insertion protrusion(12). The insertion unit is formed into one body with the head and extended in a longitudinal direction. The insertion protrusion is formed in the outer circumference of the insertion unit. The nut member comprises a retention protrusion(22) and a nut body. A hollow is formed in the inside of the nut body. The retention protrusion is projected toward the hollow, thereby being hung on the insertion protrusion.
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