Buckle

An improved buckle, comprising a plastic shell, an inserting element, and a lock core, wherein

• a horizontal socket fitting with the inserting element is formed on the plastic shell, and a cylindrical mounting slot is formed on the plastic shell for mounting the lock core, the cylindrical mounting slot communicating with the horizontal socket;
• the horizontal socket is provided with a guiding block;
• the inserting element Is provided with an inserting piece for inserting into the horizontal socket to cooperate with the lock core, with two triangular notches symmetrically formed on the inserting piece;
• a guiding groove is formed on the inserting piece to cooperate with the guiding block;
• the lock core comprises a left spring, a right spring, a left lock block, and a right lock block, the left lock block and the right lock block are symmetrical to each other, the left lock block and the right lock block are coaxially aligned with each other;
• a first triangular protrusion and a second triangular protrusion are separately formed on front ends of the left lock block and the right lock block;
• the first triangular protrusion of the left lock block is placed into the right lock block, and the second triangular protrusion of the right lock block is inserted into the left lock block;
• a first receiving space is left between the front end of the right lock block and left lock block for receiving the left spring, a second receiving space is left between the front end of the left lock block and the right lock block for receiving the right spring, and through the left spring and the right spring, coaxial displacement of the left lock block and the right lock block is realized;
• the first triangular protrusion and the second triangular protrusion separately cooperate with the triangular notches of the inserting piece.