This lock mechanism is provided with the following: a hood (20), disposed to as to surround a male member (10), into which a male connector (100) is inserted and a single locking lever (30) with a cantilevered support structure that allows elastic displacement. The locking lever (30) is disposed such that the lengthwise direction thereof is substantially parallel to the male member (10), with the free end (30a) of the locking lever (30) being on the tip side of the male member (10) and the fixed end (30b) of the locking lever (30) being on the base side of the male member (10). The locking lever (30) is provided with a prong (34) that engages with the male connector (100). A manipulation arm (35) protrudes from the surface of the locking lever (30) on the opposite side thereof from the male member (10) and extends toward the fixed end (30b) of the locking lever (30). When the tip (35a) of the manipulation arm (35) is subjected to a pressing force directed towards the male member (10), the locking lever (30) elastically displaces such that the prong (34) moves away from the male member (10).Linvention porte sur un mécanisme de verrou, lequel mécanisme comporte ce qui suit : une calotte (20), disposée de façon à entourer un élément mâle (10), dans laquelle un raccord mâle (100) est inséré et un levier de verrouillage unique (30) avec une structure de support en porte-à-faux qui permet un déplacement élastique. Le levier de verrouillage (30) est disposé de telle sorte que la direction dans le sens de la longueur de celui-ci est sensiblement parallèle à lélément mâle (10), lextrémité libre (30a) du levier de verrouillage (30) se trouvant sur le côté de pointe de lélément mâle (10), et lextrémité fixe (30b) du levier de verrouillage (30) se trouvant sur le côté de base de lélément mâle (10). Le levier de verrouillage (30) comporte une dent (34) qui vient en prise avec le raccord mâle (100). Un bras de manipulation (35) fait saillie à partir de la surface du levier de ve
