Abstract: A belt buckle has a main body, a rotatable shaft assembly, an elastic member and a controlling member. The main body has a front piece and two side pieces paired and connected with each other. A shaft rod and a stopping portion and an arced edge are formed on the side piece. The elastic member is provided inside the rotatable shaft assembly and is pivoted together on the shaft rod. The controlling member uses its controlling ends to be pivoted on the shaft rod. When the toothed portion is pushed to rotate the rotatable shaft assembly, the engaging bar of the rotatable shaft assembly can slide along the arced edge of the side piece. At this time, the controlling end of the controlling member is not linked by the engaging bar, the controlling member can be fixed in place when the belt is penetrated.

Abstract: A belt buckle may include a buckle cooperating with a belt body. The belt body comprises a connecting portion formed at one end thereof, and a plurality of punch holes arranged at the other end of the belt body. The buckle has a frame, a spring, a prong, a control unit, and a cover, and a shaft is located at one end of the frame. The shaft of the frame is adapted to pivotally connect to the connecting portion of the belt body, and a connecting base is formed at the other end of the frame. The spring is installed in the connecting base, and an open groove is formed at a middle section of the connecting base. The control unit comprises a dodging slot and a blocking portion located at positions corresponding to the open groove.