Overall buckle

An overall buckle comprising:

• a frame formed with means at a first end of said frame for detachably securing said buckle to a bib portion of an overall, and a pair of lateral limbs;
• a flap swingably mounted on said frame between said limbs, said flap having an intermediate portion provided with a pivot axis and teeth on one side of said axis cooperating with counterteeth on said frame for gripping a strap of the overall in a closed position of said flap and for releasing said strap in an open position of said flap, thereby enabling adjustment of the strap relative to said bib portion, said flap having an arm extending to an opposite side of said axis said counterteeth projecting from said frame and terminating in a plane, said teeth extending toward said counterteeth and beyond said plane to interdigitate with said counterteeth in said closed position between said lateral limbs, each of said teeth and counterteeth having a respective generally rectangular outline;
• and
• detent means between said frame and said flap releasably locking said flap in said closed position against unintentional opening, said detent means including a projection formed on said flap on said opposite side and a flexible bar spanning said limbs in a path of said projection, positioned for deflection by said projection whereby said projection engages behind said bar in said closed position, said bar being formed with at least one slit extending through said bar in a longitudinal plane perpendicular to a plane of the frame for facilitating flexing of said bar.