Lockable buckle for belts, straps or the like

A lockable buckle for belts, straps, and the like comprising an exterior shoe and a locking means accomodated therein and movable between a locked position and an open position for permitting a belt or the like to pass freely through the shoe in the opened position of the locking means and alternatively for becoming locked and fixed in the shoe under friction at an optional place along the belt when the locking means is moved into the locked position, the buckle comprising:

• A) a shoe (10) of general U-configuration with a front end and a rear end and having a bottom portion (12) and upstanding cheeks (14),
• B) a slide (30) movable in said shoe, likewise of general U-configuration and with a front and rear end, corresponding to those of the shoe, and having a bottom portion (32) and upstanding cheeks (34), and
• C) a cam means (50) pivotally mounted in said shoe (10) and actuated by an operating arm (60) for engagement with said slide,
• said shoe and said slide forming between their respective bottom portions a locking area, through which the belt passes for nipping in the locked position between the slide and the shoe, said cam means being engageable with the slide adjacent the rear end thereof for pressing the slide against the belt on assuming the locked position, and for lifting the slide from the belt when assuming the open position by the slide including at its said rear end a portion partially surrounding the cam means for said lifting,
• the buckle being further characterized in that
• first, the cheeks (34) of the slide are extended from the front end of the slide with a bridge (36), profiled for rigidity, uniting said front cheek extensions (34) and defining with said bottom portion (32) of the slide a passage opening (38) for the belt,
• secondly, the shoe (10) is provided at its rear end with three transverse, parallel openings (18, 22, 24) for threading an end piece (70) of the belt back and forth in said openings to rigidly anchor the belt end by friction in the buckle, and
• thirdly, an opening (25) of considerable width is provided in the bottom (12) of the shoe (10) at the opposite, front end of the shoe for accommodating said rigid bridge (36) of the slide (30) and also the running part (75) of the belt which is arranged to enter from below and to pass over said bridge for arriving into the locking area.