Modular jack having an anti-mismating member to prevent incorrect insertion of a smaller sized plug

摘要

A modular jack ( 100 ) includes an insulative housing ( 1 ) having a plug-receiving cavity ( 10 ), a number of conductive terminals ( 322 ) and an anti-mismating member ( 2 ) received in the housing ( 1 ) and a metal shell ( 4 ) shielding the housing ( 1 ). The anti-mismating member ( 2 ) includes a metal main portion ( 21 ) having a horizontal spring arm ( 212 ) and an insulative portion ( 22 ). The insulative portion ( 22 ) is located at a free end of the spring arm ( 212 ) and includes a sliding surface ( 222 ) and a stop surface ( 221 ) attached to an inner side of the sliding surface ( 222 ) at a free end thereof. When an undersized plug is inserted into the cavity ( 10 ), the leading edge of the undersized plug contacts the stop surface ( 222 ), preventing full insertion of the undersized plug into the cavity ( 10 ). When a mating plug is inserted into the cavity ( 10 ), the leading edge of the mating plug contacts the more forwardly-positioned sliding surface ( 222 ) before reaching the stop surface ( 221 ). This movement produces a corresponding movement in the anti-mismating member ( 2 ) and the stop surface ( 221 ) thereon such that the stop surface is located out of engagement with the leading edge of the mating plug, permitting full insertion of the mating plug into the cavity.