Abstract: Base and cover members 3, 8 are pivotally connected by a pin 13. The cover member can be rotated between an opened position and a closed position. A stopper member 9 with first and second claws is mounted on the pin to rotate around the pin. The cover member has an engagement wall 7. An end 15b of a belt 15 is inserted through the cover member, the cover member is rotated from the opened position to the closed position, and the belt is pulled in a direction of drawing the belt out of the belt buckle, and thereby, the belt is locked between the second claws and a bottom wall 5 of the cover member. At the same time, the rotational moment rotating the cover member toward the closed position is generated by the engagement wall of the cover member being pressed by the belt.

Abstract: Base and cover members 3, 8 are pivotally connected by a pin 13. The cover member can be rotated between an opened position and a closed position. A stopper member 9 with first and second claws is mounted on the pin to rotate around the pin. The cover member has an engagement wall 7. An end 15b of a belt 15 is inserted through the cover member, the cover member is rotated from the opened position to the closed position, and the belt is pulled in a direction of drawing the belt out of the belt buckle, and thereby, the belt is locked between the second claws and a bottom wall 5 of the cover member. At the same time, the rotational moment rotating the cover member toward the closed position is generated by the engagement wall of the cover member being pressed by the belt.