Patent ID: 8042235

Claim:
A buckling device for safety belts comprising: a buckle made of metal material and bent to form a projected holder, with a wider segment of the projected holder being used to insert a side of the safety belt to the buckle, wherein on each of two sides of a narrower segment of the projected holder is mounted a second side plate, wherein between two second side plates is defined a locking unit by using a shank, wherein on an upper rim of each second sideplate is a recess, with the locking unit including an engagement member in which a rotary member, a fixing piece, a compression spring, a mounting member, and a torsion spring are received, with two ends of the fixing piece extending out of two sides of the engagement member, with the compression spring abutting against the fixing piece and the engagement member, and with the torsion spring biasing against the mounting member; a fastening member including a bottom sheet, with a wider segment of the bottom sheet being used to insert another side of the safety belt, with the fastening member including a retaining pore secured on a narrower segment of the bottom sheet, wherein on one end of the engagement member is disposed a hook and on another end is mounted a seat, and wherein on two sides of the seat are respectively formed an opening for inserting the shank and a bore for inserting the fixing piece.