Waterproof electric connector

Claim 1

A waterproof electric connector comprising a pair of terminal pin holding blocks which can be coupled together to provide electrical connection therebetween, each of said blocks comprising: a housing having a chamber which is closed at one end by a partition wall and open at the other end, said partition wall being formed with at least one opening; a plug member of resilient elastomeric material sealingly but removably disposed in said chamber of said housing, said plug member being formed with a through hole which is aligned with said opening upon final fitting of said plug member in said chamber; a contact pin sealingly but removably disposed in said through hole of said plug member in a manner that at least a section of said contact pin is placed in said opening of said partition wall, said contact pin having at the section thereof a mating portion matable with a mating portion of a contact pin of the paired terminal pin holding block; locking means for locking said plug member and said housing together, said locking means including a flange portion formed about said housing at the open end of the same, and a folded back portion formed about one end of said plug member, said folded back portion enclosing said flange portion upon final fitting of said plug member in said housing thereby to accomplish locking engagement between said plug member and said housing; coupling means for coupling said housing with a housing of the paired terminal pin holding block thereby to allow said contact pin to mate with the contact pin of the paired terminal pin holding block; and sealing means for preventing said mating portion of said contact pin from being exposed to the surrounding air when the paired housing are coupled together.