US Patent 7229306 Connector and a connector assembly

A female housing (30) has a lock arm (40) and a resilient assisting piece (50). The assisting piece (50) is deformed by the lock arm (40) as the lock arm (40) is deformed. The assisting piece (50) is restored resiliently as the lock arm (40) resiliently restores and contributes to the resilient restoring force of the lock arm (40). Thus, the lock arm (40) produces a large hitting sound against the mating male housing (10). A hitting portion (52) is at the leading end of the assisting piece (50) and hits a hittable portion (27) on the mating male housing (10) to produce a separate hitting sound. Thus, two separate or simultaneous hitting sounds are produced to provide a clear audible and tactile indication of connection.