An electrical connector comprising a plug arranged and designed to connect to a receptacle. The plug includes an electrically-insulating body, a conductor ring, and a conductive member connected to the plug conductor ring. The receptacle includes an electrically-insulating body, a conductor ring having an axial inner bore and an annular groove facing radially inward, a conductive member connected to the receptacle conductor ring, and an electrically-conductive contact having a generally annular profile, at least a portion of the electrically-conductive contact received in and contacting the annular groove and at least a portion of the electrically-conductive contact not received in the annular groove. Upon insertion of the plug into the receptacle and substantially radially aligning the plug and receptacle conductor rings, the electrically-conductive contact is elastically deformed and provides electrical contact between the plug conductor ring and the receptacle conductor ring.

An evaluation jig comprises a pair of female terminals connectable to a pair of male terminals of a charging connector, and an adjustment member that can adjust contact resistance of the female terminal and the male terminal. The female terminal is reducible in diameter. The adjustment member can apply an external force to the female terminal to reduce the female terminal in diameter.

An electrical contact element for electrically contacting a mating contact element includes: a plurality of contact lamellae which are arranged around a plug opening into which a mating contact element is pluggable along a plug direction and which together form a groove that encircles the contact lamellae around the plug direction; and a spring element that is arranged on the groove and engages the contact lamellae to provide an elastic clamping force on the contact lamellae. The contact lamellae each have an inner surface which faces the plug opening and is straight in cross section transversely to the plug direction.

A diagnosis plug-in connection comprising an electrical plug connector and a mating electrical plug connector. The electrical plug connector comprises a diagnosis module with an oaten conductor contact and an inner conductor contact within the outer conductor contact. The mating plug connector comprises a diagnosis head with an electrically conductive spring cage, which is designed for electrical and mechanical connection to the outer conductor contact of the diagnosis module of the plug connector. The spring cage electrically and mechanically contacts the inner conductor contact of the diagnosis module of the plug connector when the plug connector is plugged together with the mating, plug connector.

An electrical contact element includes a common base and a plurality of spring arms extending away from the common base along a longitudinal direction. The spring arms are arranged around an opening in a circumferential direction and are spaced from one another in a contactless relaxed initial state. An end of at least two of the spring arms facing away from the common base forms an annular segment projecting in the circumferential direction on at least one side of the end. The annular segments form a support ring and mutually support each other in a fully compressed state.

A rotatable electric plug includes a plug housing including a sleeve body, a plug module including a mounting body and at least a protruding pin, and a limiting assembly coupled to the sleeve body and the mounting body. The mounting body is rotatably coupled in the sleeve body that a rotational movement of the mounting body is reversible. The mounting body has a first side and an opposed second side that a portion of the protruding pin is extended from the first side of the mounting body. The limiting assembly is arranged to block the plug module from rotating infinitely at the plug housing in one direction. The rotatable electric plug has the advantages of enabling the reversibly rotational movement of the plug module, enhancing the rotational movement of the plug module, retaining the plug module at an angular angle, and preventing the plug module from being infinitely rotated.

A circular power connector that can accommodate plugs of varying diameters includes a plurality of electrical terminals that include a contact beam extending from and monolithic with base, where the contact beam includes a contact portion, and a mounting portion that extends from and monolithic with a base for mounting the terminal to a substrate. The terminals are cylindrically arranged to receive a plug. Alternatively, each electrical terminal includes a frame portion, a first contact beam extending from the frame in a first direction, and a second contact beam extending from the frame in a second direction. Multiple electrical terminals are oriented so that the first and second contact beams for one terminal extend at an angle, preferably perpendicular, to the first and second contact beams of another electrical terminal, in a still further embodiment, an electrical terminal having two halves is provided.

An elastic contact element of the electrical connector is provided and has an upper ring, a lower ring, and a plurality of elastic flat bodies connected to and located between the upper ring and the lower ring. Each one of the elastic flat bodies is strip-shaped and forms a contact portion. The elastic flat bodies are spaced apart from each other and divided into several groups according to different height positions of the contact portions. Each one of the contact portions protrudes toward a center axis. Because the elastic flat bodies are divided into several groups according to different height positions of the contact portions, the elastic flat bodies contact an inserted male probe at various positions.

A connector includes: a rod-shaped terminal; and a housing having a terminal accommodating chamber configured to accommodate the terminal. The terminal has: a rotation restricting portion configured to engage with an inner wall of the terminal accommodating chamber to restrict rotation of the terminal about an axis of the terminal; a contact configured to be electrically connected to a counterpart terminal; and a hole configured to allow a bolt to be screwed into the hole about the axis. The housing has: a holding portion that holds the terminal inside the terminal accommodating chamber; and an opening configured to expose the hole of the terminal to an outside of the terminal accommodating chamber. The connector is configured to have a gap between the inner wall of the terminal accommodating chamber and the terminal, the gap increasing from the rotation restricting portion of the terminal toward the opening of the housing.

A socket connector includes a housing having a pin access opening through a bottom open to a cavity configured to receive a pin. The socket connector includes a socket in the cavity electrically connected to a pin. The socket connector includes a latch movably received in a latch pocket to engage the pin to secure the socket connector to the pin. The latch includes a latch release accessible exterior of the housing to release the latch. The latch release moves the latch between a latched position and a clearance position. A latching rib of the latch engages the pin in the latched position and is released from the pin in the clearance position to allow uncoupling of the socket connector from the pin.