Buckle of swimming goggles

The invention discloses a buckle of swimming goggles. The buckle comprises a swimming goggle edge buckle body, a rotary shaft and a head belt. A hollow column is formed at one end of the head belt, a pair of mounting grooves is formed in the corresponding positions of the upper wall and the lower wall of the swimming goggle edge buckle body, and the upper wall and the lower wall of the swimming goggle edge buckle body are connected as a whole through a first side wall, a second side wall and a cross beam. The mounting grooves are close to the first side wall, the end, with the hollow column, of the head belt firstly penetrates through the cross beam of the edge buckle body, covers the half edge of the cross beam in the head belt, then penetrates through a head belt hole in one side of the swimming goggles from inside to outside and is folded back, finally the hollow column is arranged on the rotary shaft in a sleeving mode and is rotatably connected into the mounting grooves, and the hollow column is closely attached to the head belt. The buckle of the swimming goggles is ingenious in structure and high in comfort degree, the effect of adjusting the tightness of the head belt can be fast achieved by moving the edge buckle body of the swimming goggles front and back, and the adjusting process is very convenient. Due to the fact that the head belt is closely attached to the hollow column when folded back to penetrate through the cross beam, friction force is increased, the slip limiting effect is better, and it is ensured that the swimming goggles are used normally for a long time.