A first hooking face and a second hooking face which are hooking end faces of an engaging portion of a plug member releasably engage a first engaging face which is a top wall end face of an opening of a socket member and a second engaging face which is a side wall end face thereof respectively, so that...http://www.google.fr/patents/US6351876?utm_source=gb-gplus-shareBrevet US6351876 - Side release buckle
