US Patent 9263830 Charging connector

A charging connector includes a connector housing to be fitted to a power receiving connector, a connector case housing the connector housing, a lock arm arranged to be swingable about a swing fulcrum between a lock position and a release position, and a coil spring located toward a power receiving connector away from the swing fulcrum to bias the lock arm toward the lock position. The lock arm is provided with a spring compartment housing the coil spring in a manner such that the periphery of the coil spring is enclosed. The spring compartment is provided, on a bottom portion thereof, with a penetration hole extending in the lock arm.