Mask having a frontal positioning device

Abstract

A structure of an underwater sports mask includes a lens frame, a lens portion and a water sealing skirt. A central area of the lens frame is provided with a positioning device for connecting a frontal breathing tube, and the positioning device allows the breathing tube to move along the axial direction of the breathing tube.

What is claimed is: 
     
         1 . Structure of an underwater sports mask, comprising:
 a lens frame;   a lens portion, having at least one peripheral edge;   a water sealing skirt, a front of the water sealing skirt and the at least one peripheral edge of the lens portion being coupled in a watertight fit into the lens frame, and a rear of the water sealing skirt having a gasket portion, when a user wears the mask, a rear peripheral edge of the gasket portion is capable of being covering at least the user's eyes and nose to be watertight from an outside;   characterized in that:   the lens frame is provided with a positioning device at a central portion thereof for connecting a frontal breathing tube, and the positioning device allows the frontal breathing tube to be displaced along an axial direction of the breathing tube.   
     
     
         2 . The structure of an underwater sports mask according to  claim 1 , wherein the frontal breathing tube has a mouthpiece for being contained in the user's mouth for breathing. 
     
     
         3 . The structure of an underwater sports mask according to  claim 2 , wherein the lens frame has a left frame, a right frame, and a bridge connected between the left frame and the right frame, and the lens portion includes two mutually independent lenses which are formed with two peripheral edges, in which the front of the water sealing skirt and the two peripheral edges of the two lenses are watertight and fitted into the left frame and the right frame, respectively, and the positioning device is disposed on the bridge. 
     
     
         4 . The structure of an underwater sports mask according to  claim 3 , wherein the positioning device and the bridge are detachably connected. 
     
     
         5 . The structure of an underwater sports mask according to  claim 3 , wherein the positioning device comprises a holding portion and a fixing portion, wherein the holding portion has an opening smaller than a diameter of the breathing tube, and is suitable for holding and restraining the breathing tube received from the opening, and wherein the fixing portion is connected with the bridge. 
     
     
         6 . The structure of an underwater sports mask according to  claim 5 , wherein the fixing portion and the bridge are detachably connected. 
     
     
         7 . The structure of an underwater sports mask according to  claim 6 , wherein one of the bridge and the fixing portion is provided with two rails, and the other is provided with two sliders being capable of engaging with the rails. 
     
     
         8 . The structure of an underwater sports mask according to  claim 6 , wherein one of the bridge and the fixing portion is provided with a rail, and the other is provided with a slider being capable of engaging with the rail. 
     
     
         9 . The structure of an underwater sports mask according to  claim 6 , wherein the fixing portion and the bridge are quick-release engaged with each other. 
     
     
         10 . The structure of an underwater sports mask according to  claim 5 , wherein an included angle between an axial direction of the holding portion and a plane on which the lens frame lies ranges from 0 to 80 degrees. 
     
     
         11 . The structure of an underwater sports mask according to  claim 10 , wherein the included angle ranges between 20 degrees and 60 degrees. 
     
     
         12 . The structure of an underwater sports mask according to  claim 5 , wherein the fixing portion and the bridge are pivotally connected. 
     
     
         13 . The structure of an underwater sports mask according to  claim 5 , wherein the lens frame has an outer periphery, and the positioning device is detachably connected to the outer periphery. 
     
     
         14 . The structure of an underwater sports mask according to  claim 13 , wherein one of the outer periphery of the lens frame, and the fixing portion is provided with a rail, and the other is provided with a slider being capable of engaging with the rail.