Abstract: A lock assembly of a DIN type connector, which includes a first cover and a second cover associated with a coupling to provide a lock system for locking the connector. The connector has a housing, a first cover, a body, a coupling, a second cover, a coil spring, and a cap; wherein the coupling has two slider levers, each with a respective hole, and the second cover. The second cover has two legs, each passing through the hole in a respective slider lever, and each having a respective protrusion, which form a locking system to lock the parts of the connector and base firmly, but are capable of being disassembled by an easy operation.