Purification straw and portable drinking device using the same

Abstract

The present disclosure provides a purification straw and a portable drinking device using the purification straw. The purification straw includes a main body and a filtering element. The main body includes a first cavity, a first inlet communicating with the first cavity and a first outlet communicating with the first cavity. The filtering element is located in the first cavity. The filtering element includes a first pipe portion and a bottom portion connected with a first end of the first pipe portion. A second cavity is surrounded by the first pipe portion and the bottom portion and a second outlet communicating with the second cavity located at a second end of the first pipe portion far away from the first end, the bottom portion is located between the second end and the first inlet, a gap located between the first pipe portion and the main body.

What is claimed is: 
     
         1 . A purification straw, comprising:
 a main body comprising a first cavity, a first inlet communicating with the first cavity and a first outlet communicating with the first cavity; and   a filtering element located in the first cavity, comprising a first pipe portion, a bottom portion connected with a first end of the first pipe portion, a second cavity surrounded by the first pipe portion and the bottom portion and a second outlet communicating with the second cavity located at a second end of the first pipe portion far away from the first end, the bottom portion located between the second end and the first inlet, a gap located between the first pipe portion and the main body,   wherein liquid from the first inlet flows into the gap, is filtered by the bottom portion and the first pipe portion and flows out from the second outlet via the second cavity.   
     
     
         2 . The purification straw of  claim 1 , wherein the main body comprises a second pipe portion and a third pipe portion connected with an end of the second pipe portion, the first cavity comprises a first part surrounded by the second pipe portion communicating with the first outlet and a second part surrounded by the third pipe portion communicating with the first inlet, an inner diameter of the second pipe portion is less than an inner diameter of the third pipe portion, and the filter element is located in the first part. 
     
     
         3 . The purification straw of  claim 2 , wherein the first pipe portion, the second pipe portion and the third pipe portion have the same center axis. 
     
     
         4 . The purification straw of  claim 2 , wherein the second pipe portion comprises a first side wall, a second side wall and a third side wall, the second side wall is connected between the first side wall and the third side wall, an inner diameter of the second side wall is less than an inner diameter of the first side wall and is greater than an inner diameter of the third side wall. 
     
     
         5 . The purification straw of  claim 4 , wherein the filter element is located in the first side wall, and the third pipe portion is inserted in the third side wall. 
     
     
         6 . The purification straw of  claim 4 , wherein the inner diameter of the second side wall reduces gradually along a direction from the first side wall to the third side wall. 
     
     
         7 . The purification straw of  claim 4 , wherein the second pipe portion further comprises a fourth side wall connected with an end of the first side wall far away from the second side wall, the inner diameter of the first side wall is less than an inner diameter of the third side wall, an external diameter of the first pipe portion is less than the inner diameter of the first side wall. 
     
     
         8 . The purification straw of  claim 7 , wherein an external diameter of the first side wall is less than an external diameter of the fourth side wall and is greater than an external diameter of the second side wall, and an external diameter of the third side wall is less than the external diameter of the second side wall and is greater than an external diameter of the third pipe portion. 
     
     
         9 . The purification straw of  claim 1 , wherein the main body is made of plastic material, and the filtering element is made of activated carbon material. 
     
     
         10 . A portable drinking device, comprising:
 a container comprising a chamber and an opening communicating with the chamber;   a first cover configured to cover the opening and connected with the container;   a straw portion passing through the first cover; and   a purification straw located in the chamber and connected with an end of the straw portion, the purification straw comprising a main body and a filtering element, the main body comprising a first cavity, a first inlet communicating with the first cavity and a first outlet communicating with the first cavity, the filtering element located in the first cavity, comprising a first pipe portion, a bottom portion connected with a first end of the first pipe portion, a second cavity surrounded by the first pipe portion and the bottom portion and a second outlet communicating with the second cavity located at a second end of the first pipe portion far away from the first end, the bottom portion located between the second end and the first inlet, a gap located between the first pipe portion and the main body,   wherein liquid from the chamber flows into the gap via the first inlet, is filtered by the bottom portion and the first pipe portion and flows into the end of the strew portion via the second cavity and the second outlet.   
     
     
         11 . The portable drinking device of  claim 10 , wherein the main body comprises a second pipe portion and a third pipe portion connected with an end of the second pipe portion, the first cavity comprises a first part surrounded by the second pipe portion communicating with the first outlet and a second part surrounded by the third pipe portion communicating with the first inlet, an inner diameter of the second pipe portion is less than an inner diameter of the third pipe portion, and the filter element is located in the first part. 
     
     
         12 . The portable drinking device of  claim 11 , wherein the first pipe portion, the second pipe portion and the third pipe portion have the same center axis. 
     
     
         13 . The portable drinking device of  claim 11 , wherein the second pipe portion comprises a first side wall, a second side wall and a third side wall, the second side wall is connected between the first side wall and the third side wall, an inner diameter of the second side wall is less than an inner diameter of the first side wall and is greater than an inner diameter of the third side wall. 
     
     
         14 . The portable drinking device of  claim 13 , wherein the filter element is located in the first side wall, and the third pipe portion is inserted in the third side wall. 
     
     
         15 . The portable drinking device straw of  claim 13 , wherein the inner diameter of the second side wall reduces gradually along a direction from the first side wall to the third side wall. 
     
     
         16 . The portable drinking device of  claim 13 , wherein the second pipe portion further comprises a fourth side wall connected with an end of the first side wall far away from the second side wall, the inner diameter of the first side wall is less than an inner diameter of the third side wall, an external diameter of the first pipe portion is less than the inner diameter of the first side wall. 
     
     
         17 . The portable drinking device of  claim 16 , wherein an external diameter of the first side wall is less than an external diameter of the fourth side wall and is greater than an external diameter of the second side wall, and an external diameter of the third side wall is less than the external diameter of the second side wall and is greater than an external diameter of the third pipe portion. 
     
     
         18 . The portable drinking device of  claim 10 , wherein the portable drinking device further comprises a second cover configured to cover a side of the first cover far away from the container and connected with the first cover. 
     
     
         19 . The portable drinking device of  claim 10 , wherein the straw portion comprises a main pipe passing through the first cover, a first extending portion connected with an external side of the main pipe and located in a side of the first cover adjacent to the container, and a connection portion connected with the first extending portion, the main pipe is connected with the second end of the first pipe portion, and the main body is connected with the connection portion. 
     
     
         20 . The portable drinking device of  claim 19 , wherein the main pipe is inserted in the second outlet of the second end of the first pipe portion, and the connection portion is inserted in the first outlet of the main body.