Importance

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Abstract

Provided is a novel technology for determining the cause of a faulty insertion of a block body into a plug blade insertion hole, and for solving that problem fundamentally. The externally extending shapes of a ceiling plate and a rotary frame are made circular by using the novel technology as the core technology, to thereby make improvements including the integration of a locking function and a power supply connection function. A selection is made which of a rotary frame (4) or a ceiling plate (22) is used as a reference, and a rotary track is set for the selected reference with the intersection of a longitudinal center line and a lateral center line used as the center of a circle. A new rotary track is provided for the other with the intersection of a lateral center line before rotation and a lateral center line after rotation used as the center of a circle in a state where the longitudinal center line is always aligned with the longitudinal center line of the selected reference. On the basis of that technology, both the rotary frame and ceiling plate are made circular so that power supply can be connected directly with the plug blade through the rotary frame (4), the block body, a substrate, or the like, which have the terminals of receptacle provided on the whole lengths of the rotation tracks thereof.

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First Claim