Swing waterski

Abstract

A swing waterski is provided, which includes a main body and at least one fin mounted to the main body and adapted to swing. The main body includes a top wall, a bottom wall, an arc front wall connecting the top wall and the bottom wall, and two sidewalls connected to the top wall, the bottom wall and the arc front wall. A contour of the bottom wall is symmetric to a central axis of the main body and presents a convex arc shape. A boundary of the arc front wall and the top wall and boundaries of the two sidewalls and the top wall are located in a same plane. A front half part of the bottom wall has a shape similar to a partial bowl shape and is curled upward, so as to decrease a water resistance.

What is claimed is: 
     
         1 . A swing waterski, comprising:
 a main body, comprising a top wall, a bottom wall, an arc front wall connecting the top wall and the bottom wall, and two sidewalls connected to the top wall, the bottom wall and the arc front wall, wherein a contour of the bottom wall is symmetric to a central axis of the main body and presents a convex arc shape, and a boundary of the arc front wall and the top wall and boundaries of the two sidewalls and the top wall are located in a same plane; and   at least one fin, mounted to the main body and adapted to swing.   
     
     
         2 . The swing waterski as claimed in  claim 1 , wherein the main body comprises a back wall connected to the top wall, the bottom wall and the two sidewalls, and a location on the back wall and farther away from one of the two side sidewalls is farther away from the same plane where the boundaries of the two sidewalls and the top wall are located. 
     
     
         3 . The swing waterski as claimed in  claim 1 , wherein the main body is an inflatable part, and the main body comprises a plurality of drawstrings located in internal of the main body and connected to the top wall and the bottom wall. 
     
     
         4 . The swing waterski as claimed in  claim 3 , wherein the drawstrings divide the internal of the main body into a plurality of cavities connected to each other. 
     
     
         5 . The swing waterski as claimed in  claim 1 , further comprising:
 at least one fixing rack, fixed on the bottom wall of the main body, wherein each of the fixing racks comprises two first portions protruding out of the bottom wall and a second portion located and connected between the two first portions, and a number of the fixing racks corresponds to a number of the at least one fin, and each fin is disposed at the second portion of each fixing rack.   
     
     
         6 . The swing waterski as claimed in  claim 5 , wherein the at least one fixing rack comprises two fixing racks symmetrically disposed at two sides of the central axis, and in each of the fixing racks, a length of one of the two first portions away from the central axis is larger than a length another of the two first portions close to the central axis. 
     
     
         7 . The swing waterski as claimed in  claim 5 , wherein in each of the fixing racks, the two first portions are parallel to each other. 
     
     
         8 . The swing waterski as claimed in  claim 1 , further comprising:
 at least one antiskid sheet, disposed on the top wall of the main body.   
     
     
         9 . The swing waterski as claimed in  claim 1 , further comprising:
 a rudder plate, disposed on the bottom wall along a direction parallel to the central axis of the main body.   
     
     
         10 . The swing waterski as claimed in  claim 1 , wherein the top wall of the main body presents a concave arc shape, and a contour of the top wall matches the contour of the bottom wall.