Connector

A connector, comprising:

• a first connector including a first connector housing provided with a receptacle having an opening on one end and configured to accommodate first terminal fittings on a back end of the receptacle;
• and
• a second connector to be connected to the first connector;
• wherein:
• the second connector includes:
• a second connector housing including cavities provided side by side and configured to be accommodated into the receptacle;
• second terminal fittings to be accommodated respectively into the cavities, the second terminal fittings being connectable respectively to the first terminal fittings and having wires connected thereto;
• a rubber plug configured to seal between outer peripheral surfaces of the wires and an inner peripheral surface of the receptacle on a rear side of the second connector housing;
• and
• a holder configured to retain the second connector housing and the rubber plug in the receptacle by being engaged with an engaging projection provided on an outer surface of the first connector housing and mounted on the receptacle;
• the holder is provided with a projecting portion projecting toward the second connector housing and terminal insertion holes enabling insertion of the second terminal fittings respectively;
• the rubber plug is provided with an insertion hole enabling insertion of the projecting portion therethrough;
• the second connector housing is provided with an engaging portion engageable with an engaging claw provided on a tip part of the projecting portion;
• the engaging portion is located inwardly of the cavity located at an outermost position;
• the first connector housing includes a cylindrical fitting to be fit into a mounting hole provided in a device;
• the receptacle is insertable into the mounting hole and has an oval cross-section;
• the engaging projection projects in a minor axis direction of the receptacle;
• the holder of the second connector is provided with a lock arm having an engaging hole engageable with the engaging projection;
• the lock arm includes a base end portion projecting from the holder in a direction perpendicular to an arrangement direction of the terminal insertion holes and an arm projecting from a projecting end part of the base end portion toward the second connector housing;
• a cut provided in an opening end part of the receptacle and recessed toward the engaging projection;
• and
• the base end portion of the lock arm is accommodated in the cut.