US Patent 11517080 Freely spliced buckle strap and watchband

The disclosure concerns a freely spliced buckle strap, at least two buckle units and a buckle connection structure; the buckle connection structure includes a clamping protrusion and a clamping groove, and a first transverse convex strip is provided on or closed to the clamping protrusion; the clamping groove is provided with a second transverse convex strip that can be matched, clamped and locked with the first transverse convex strip; two adjacent buckle units are placed in the clamping groove of the other buckle unit, and are reliably connected to form a whole through the match, clamping and locking by the first and second transverse convex strips.