Abstract: A connector assembly consists of a first connector (20) having a thickness substantially equal to that of an IC card (10) and placed in a recess (11) of the IC card which incorporates an electrical circuit and a second connector (30) to be plugged into the first connector. The first connector includes a shield case (21); a first dielectric housing (23) placed in the shield case; a pair of first foolproof structures (23C, 23D) provided on opposite sides of the first dielectric housing. The first foolproof structures are made from a combination of divisions each defined by horizontal and vertical dividing lines and extending forwardly from a front face (23B) of the first dielectric housing. The second connector includes a second dielectric housing with a terminal support (32) extending forwardly therefrom; a pair of second foolproof structures (32A, 32B) provided on opposite sides of the terminal support.

Abstract: An electgromagnetic interference resistant electrical connector consisting of an electrical plug and an electrical receptacle. The electrical plug includes an insulating housing having a floor portion which defines a fitting cavity; first contact elements arranged on a surface of the floor portion such that their contact sections are exposed in the fitting cavity; first shield plate provided on the other surface of the floor portion; and second shield plate provided above the contact sections to cover the fitting cavity.

Abstract: An electrical connector to which insulated conductors of a multiconductor cable are connected by insulation piercing, which includes an insulation housing having a front recess and a rear recess; a plurality of contacts arranged in the insulation housing so that their contacting sections are exposed in the front recess and their piercing sections project upwardly in the rear recess; and a guide block disposed in the rear recess and having a lateral slot in which the insulated conductors are arranged side by side at regular intervals, a plurality of vertical slots into which the piercing sections are inserted, and a deformation groove provided behind the vertical slots for securing the insulated conductors to the guide block when it is deformed.

Abstract: A lock mechanism for an electrical connector having an insulating housing, contact elements arranged in the insulating housing, and a cover case for covering at least a rear portion of the insulating housing, which includes a pair of flexible lock arms extending backwardly from front ends of opposite side walls of the insulating housing; a pair of flexible control members provided on opposite side walls of the cover case; a lock member provided on each lock arm for engagement with a mating connector lock member; and an operational portion provided on the lock arm behind the lock member so that it is aligned with the control member.

Abstract: In order to prevent a tension control pad from being excited to the point of undergoing resonance, an arrangement modifies the normal resonance frequency of the pad upon a given amount of tension being developed in the tape against which the pad is applied. In the disclosed embodiment, the provision takes the form of a projection which engages a resilient leaf spring-like member upon a predetermined amount of flexure occuring in a manner which stiffens the arrangement and elevates its resonance frequency.

Abstract: A modular connector consists of a plug and a jack. The plug has a first insulating housing containing terminals and a first metal case for covering the first insulating housing and having a closing piece for closing openings between the first metal case and the cable. The jack has an second insulating housing for containing contacts, a second metal case for covering the second insulating housing, and a connection piece mounted in the second insulating housing for making an electrical connection between the first and second metal cases.

Abstract: An electrical connector receptacle to be mounted on a circuit board, which comprises a housing; a pair of projection members provided on opposite sides of the housing; and a pair of mounting members made of springy sheet metal each having an annular fixing portion having a central opening adapted to be snapped over the projection member and a pair of leg portions extending from the fixing portion and adapted to be inserted into mounting holes of the board.

Abstract: An electric connector receptacle comprises an insulating housing having a plug inserting end, a rear end on the side opposite thereto, a plug inserting hole extending inwardly from the plug inserting end and four side walls surrounding the plug inserting hole, and a plurality of contacts arranged at intervals in the insulating housing. Each contact has a spring contact portion, an intermediate portion, and a mounting portion. The insulating housing has a plurality of compartment grooves which receive, from the side of the rear end, the connecting portions of the spring contact portions and the intermediate portions of the contacts at positions adjacent to the plug inserting end inside the side wall, contact inserting holes that lead from the rear end to the plurality of compartment grooves, and a plurality of vertical mounting grooves near the rear end to receive the mounting portions of the contacts from the side of the rear end.