Environmentally resistant EMI rectangular connector having modular and bayonet coupling property

A bayonet coupling connector comprising in combination:

• a plug shell (38);
• a receptacle shell (39) having removable insert modules (40) and a bayonet coupling mechanism;
• a spring (53) and an O-ring seal (56) disposed in a groove around each insert housing on plug shell (38) thereby providing electronic grounding and environmental sealing to mating receptacle shell (39);
• and wherein said insert module (40) comprises an assembly including a rubber grommet (2), a rigid dielectric contact retainer (3), a rubber insert (4), and a metal pressure ring (54);
• said rubber grommet (2) bonded onto said rigid dielectric contact retainer (3), said dielectric contact retainer (3) bonded onto said rubber insert (4), and said metal pressure ring (54) providing enclosure of said bonded rubber grommet (2) and said rigid dielectric contact retainer ring (3).

The method of installing a locking pin assembly onto a plug shell (39) comprising the steps of:

• inserting a locking pin (42) onto a positioning washer (4b);
• installing a wavespring (52) onto the locking pin (41);
• assembling the locking pin (41) through plug shell (38);
• inserting a snap ring (51) onto inserted locking pin (41);
• inserting a coil spring (50) onto locking pin (41);
• assembling one end of coil spring (50) into a hole (74) on plug shell (38) and installing a further end of coil spring (50) into a hole (75) on locking pin (41);
• winding a half turn in the clockwise direction on locking pin (41) to locate and install a roll pin (47) onto plug shell (38);
• and then,
• assembling a dowel pin (43) onto locking pin (41) utilizing a definitive dimension (76).

An insert module (40) comprising in combination:

• a rubber grommet (2) bonded onto a rigid dielectric contact retainer (3), said rigid dielectric contact retainer (3) bonded onto a rubber insert (4);
• said insert module (40 further including a pressure ring (54) and an O-ring seal (55) disposed in a groove around the pressure ring (54) housing thereby providing environmental sealing on said insert module (40);
• a keyway (48) disposed on said pressure ring (54) and a rubber insert (4);
• said keyway (48) interengageable with a key (49) on a plug (38) and receptacle (39) connector shells facilitating assembly when loading said insert module (40) into an insert module cavity (77) on said plug (38) and said receptacle connector (39);
• and,
• a backshell (73) for retaining and maintaining said insert module (40) in a bottoming position inside said insert module cavity (77).