Swimming goggles

The invention discloses swimming goggles which comprise a goggle frame, an upper frame, lenses, a head belt and a length adjusting device. The length adjusting device comprises bases, elastic sheets, rolling shafts and upper covers, the upper frame, the bases and the lenses are connected to form an integral structure through first-time coating and injection molding, and the swimming goggles are formed by the integral structure and the goggle frame through second-time coating and injection molding. An elastic sheet mounting groove and a pair of connecting holes for being connected with the corresponding rolling shaft are formed in each base, after the elastic sheets are mounted, clearances allowing the head belt to penetrate and then be folded and assembled are reserved between the elastic sheets and the rolling shafts, and pressing buckles are formed on the elastic sheets to adjust the clearances between the elastic sheets and the rolling shafts in a pressing mode. The swimming goggles have the advantages that the components of the swimming goggles are assembled through a coating and injection molding process, various match colors can be provided for the swimming goggles, and the swimming goggles obtained through the assembling mode are stable in structure and long in service life. Meanwhile, the specific length adjusting mechanism is utilized for adjusting the length of the head belt fast, ingeniously and conveniently.