Oliff & Berridge
Lever-operated connector
 A lever-operated connector includes a pair of connector housings displaced toward each other to be connected together by rotationally moving a lever form an open position to connected position, a cam follower portion provided on one connector housing, the lever rotatably mounted on the other connector housing, a lever lock portion, and a return spring. The lock portion has a retaining pawl provided on the one connector and a retained portion provided on the lever. The cam portion has a play region for allowing the lever to return a predetermined angle from the connected position toward the open position. A surface on which the retained portion is engaged with the retaining pawl is inclined in such a direction as to hamper retraction of the retaining pawl. Furthermore, the lever is automatically brought into a upstanding condition by the return spring. 
Sumitomo Wiring Systems, Ltd.
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Hisashi Masashi
Konoya Saito