Abstract: An electrical plug device includes a housing, support members coupled to the housing and electrically conductive members, each supported by one of the support members. The support members are able to rotate about respective axes so that the electrically conductive members can move between a closed position with the electrically conductive members folded into a trough in the housing and an open position with the electrically conductive members extended out of the housing. An elastic member is coupled to the housing to engage one or more of the support members when the electrically conductive members are in the open position or the closed position. Rotation of the support members from the open or closed positions is inhibited by the engagement of the elastic member and the one or more support members.

Abstract: A system for engaging devices having connectable electrical connectors includes a first device and a second device. The first device has a first electrical connector exposed at a first surface that is contoured to define one or more recesses, each of which has a lip. The second device has a second electrical connector exposed at a second surface that is contoured to define one or more gripping elements, each of which fits into one of the recesses to grip one of the lips when the first and second electrical connectors are connected together. The first device also has a movable element that can be positioned such that when the one or more gripping elements are in the one or more recesses and gripping the one or more lips, the movable element blocks the gripping elements from being moved out of the recesses or away from the lips.

Abstract: A transparent heel and sole assembly comprises a sole, a heel and a connecting sheet. The sole is formed in a surface thereof with a locating hole. The heel is made of transparent material and formed on the top surface thereof with a protruding closed wall that defines a locating groove. The protruding closed wall is to be engaged in the locating hole of the sole. The connecting sheet is made of transparent material and formed in a surface thereof with an engaging column that is to be inserted in the locating hole of the sole and then to be engaged with the protruding closed wall of the locating groove of the heel.