Patent attributes
A fitting structure for an electrical connection part, includes a case body with an opening, and a cap connected to the case body turnably about a center of turning which extends substantially perpendicular to an insertion direction of an external connection terminal connected to a connection terminal housed in the case body. The case body includes a fitting portion around the opening, and a first engagement piece extending outside from the fitting portion. The cap includes a second engagement piece extending inside to engage with the first engagement piece. An extension of at least one of the first engagement piece or second engagement piece decreases in length in the direction of the center of turning, toward an end of the extension, and/or includes chamfers on the both sides of the middle position of the extension in the direction of the center of turning.
