A connector is provided that can be coupled with a low inserting force and that will not terminate coupling operation while it is in an incomplete coupling state. The connector comprises a pair of housings coupled to each other, a pivotal piece pivotally provide on one of the two housings, a spring interposed...http://www.google.fr/patents/US5569041?utm_source=gb-gplus-shareBrevet US5569041 - Low insertion force electrical connector
