Abstract: A structure of a U-shaped lace buckle is disclosed. The U-shaped lace buckle comprises a shallow trench located at a central region. A releasing hole and a fastening hole are disposed within the central hollow region. The dimension of the releasing hole is larger than that of fastening hole. The releasing hole and the fastening hole are connected by a gradually tapering hole, wherein the dimension of the tapering hole connecting with the releasing hole is larger and the dimension of the tapering hole connecting with fastening hole is smaller. And the fastening hole comprises a plurality of protruded elements projecting from the inner surface. Further, the lace buckle comprises a through channel that passes from one end to the other end and connected through an arch-shaped groove located in between said two ends.

Abstract: A structure of a U-shaped lace buckle is disclosed. The U-shaped lace buckle comprises a shallow trench located at a central region. A releasing hole and a fastening hole are disposed within the central hollow region. The dimension of the releasing hole is larger than that of fastening hole. The releasing hole and the fastening hole are connected by a gradually tapering hole, wherein the dimension of the tapering hole connecting with the releasing hole is larger and the dimension of the tapering hole connecting with fastening hole is smaller. And the fastening hole comprises a plurality of protruded elements projecting from the inner surface. Further, the lace buckle comprises a through channel that passes from one end to the other end and connected through an arch-shaped groove located in between said two ends.