Abstract: Secondary-power output cable is detachably coupled to an adapter body via a cable connector. The cable connector includes a jack provided on the adapter device and a plug attached to the output cable. The jack and plug have respective engaging mechanisms that cooperate to provide an interlocking mechanism to prevent the output cable from being accidentally decoupled from the adapter body. To provide the interlocking mechanism, the plug has an outward projection formed on the outer surface thereof and the jack has a plug hole for insertion of the plug and an entry recess formed in the inner surface of the jack defining the plug hole, so that the plug can be introduced into the jack only in a particular angular position. The outward projection of the plug is brought into engagement by a locking recessed portion, formed in the inner surface of the jack, by rotating the plug after insertion into the plug hole.

Abstract: A transformer has a bobbin having a winding surface formed at a periphery thereof. Provided on the winding surface of the bobbin are at least one primary winding layer formed by a conductor wound around the winding surface of the bobbin, at least one secondary winding layer formed by a conductor wound around the winding surface of the bobbin, and at least one insulating layer each arranged between an associated one of the at least one primary winding layer and an associated one of the at least one secondary winding layer, for insulating them from each other. The at least one insulating layer is bent at an associated one of the at least one end portion of the bobbin and extends from the winding surface of the bobbin to a portion of the bobbin other than the winding surface.

Abstract: In an electric device wherein the shaft of a rotary component part of the electric device is operated by an operating member located eccentrically with respect to the axis of the shaft, a universal coupling is provided between the operating member and the shaft.