Diving Mask

Abstract

A diving mask comprises a mask and a breathing tube. The mask is provided with a viewing compartment, a breathing compartment, a first airway and a second airway. The breathing tube is provided with a single breathing airway. The first airway connects the breathing airway and the viewing compartment. The second airway connects the breathing compartment and the breathing airway. The viewing compartment and the breathing compartment are connected through a first check valve. The breathing compartment and the second airway are connected through a second check valve. When the above-mentioned diving mask is in use, outside air can enter the breathing compartment through the breathing airway, the first airway, the viewing compartment and the first check valve. The exhaled air in the breathing compartment can be expelled out of the mask through the second check valve, the second airway, and the breathing airway.

What is claimed is: 
     
         1 . A diving mask comprising a mask and a breathing tube with the breathing tube connected to the mask, wherein the mask has a viewing compartment, a breathing compartment, a first airway, and a second airway; the breathing tube has a single breathing airway; the first airway connects the breathing airway and the viewing compartment; the second airway connects the breathing compartment and the breathing airway; the viewing compartment connects to the breathing compartment via a first check valve; and the breathing compartment connects to the second airway via a second check valve. 
     
     
         2 . The diving mask of  claim 1 , wherein the number of the second airways is two, and the two second airways connect to opposite sides of the first airway. 
     
     
         3 . The diving mask of  claim 1  further comprising a mask glass and a mask liner, wherein the mask liner is provided on the mask glass to divide the mask glass into the viewing compartment and the breathing compartment; the first airway is provided on the mask liner; the outside side of the mask glass and the inner side of the mask liner together form the second airway; and the first check valve and the second check valve are provided on the mask liner. 
     
     
         4 . The diving mask of  claim 3 , wherein the mask liner includes a frame part, a dividing part, and a ventilating part; the dividing part is connected within the frame part to divide the mask glass into the viewing compartment and the breathing compartment, with the first check valve is provided on the dividing part and the second check valve provided at the junction of the dividing part and the frame part; the inner side of the frame part is the inner side of the mask liner; and the ventilating part is connected to the rim of the frame part and formed with the first airway. 
     
     
         5 . The diving mask of  claim 4  further comprising a mask frame connecting the mask glass and the frame part. 
     
     
         6 . The diving mask of  claim 5 , wherein the mask frame includes an accommodating tube that accommodates the ventilating part; and the breathing tube connects to the accommodating tube, with the end portion of the breathing tube away from the accommodating tube being formed with a ventilating hole connecting to the breathing airway. 
     
     
         7 . The diving mask of  claim 1 , wherein the breathing tube is connected to the mask in a rotatable way. 
     
     
         8 . The diving mask of  claim 7  further comprising a fold-lock structure to fasten the breathing tube onto the mask in a rotatable way. 
     
     
         9 . The diving mask of  claim 8 , wherein the fold-lock structure includes a handle and a hook that are installed on the mask in a rotatable way with respect to a same axis; the hook fastens the breathing tube onto the mask when the handle and the hook are in a first position; and the hook departs from the breathing tube so that the breathing tube becomes rotatable with respect to the mask when the handle and the hook are in a second position.