| 摘要 |
PROBLEM TO BE SOLVED: To provide a coupling device capable of improving action efficiency and appearance quality, in an expansion state of a folding device comprising a plurality of housings having an action surface.SOLUTION: A coupling device has a plurality of housings, an action surface applied on a plurality of housing surfaces, and a coupling part coupling the plurality of housings and mutually rotating and expanding them. In a state where the action surfaces are rotated and expanded substantially on the same surface, the connection part retreats to a position of not projecting to the same surface.SELECTED DRAWING: Figure 1(a) |
