Electronic cigarette

Abstract

Disclosed is an electronic cigarette ( 200 ), comprising a cylindrical housing ( 1 ) and an atomizer ( 21 ) provided inside the housing ( 1 ). An end of the housing ( 1 ) is provided with a suction nozzle primary cover ( 51 ) and a suction nozzle secondary cover ( 52 ), the suction nozzle primary cover ( 51 ) and the suction nozzle secondary cover ( 52 ) are successively inserted and fixed to an inner wall of the housing ( 1 ), and a cooling cavity is formed between the suction nozzle primary cover ( 51 ) and the suction nozzle secondary cover ( 52 ). Both the suction nozzle primary cover ( 51 ) and the suction nozzle secondary cover ( 52 ) are provided with a ventilation hole ( 512, 523 ) in communication with the cooling cavity, and a ventilation column ( 521 ) is formed in the suction nozzle secondary cover ( 52 ) for communicating the cooling cavity with the outside of the electronic cigarette. This electronic cigarette can reduce or avoid the possibility of a smoker inhaling cigarette liquid, and improve the safety of use.

What is claimed is: 
     
         1 . An electronic cigarette including a cylindrical casing and an atomizer provided in the casing, wherein, one end of the casing is provided with a mouthpiece main cover and a mouthpiece vice cover, the mouthpiece main cover and the mouthpiece vice cover are separately inserted in and fixed to the inner wall of the casing in sequence, a cooling cavity for cooling the fine tobacco-liquid particles contained in the smoke on the inner wall thereof and allowing for as the smoke flowing through and transferring heat with the mouthpiece main cover and the mouthpiece vice cover the heat being absorbed by the both as a share, is formed between the mouthpiece main cover and the mouthpiece vice cover, the mouthpiece main cover and the mouthpiece vice cover both are provided thereon with vent holes communicating with the cooling cavity, the inside of the mouthpiece vice cover is formed with a vent column communicating the cooling cavity with the external of the electronic cigarette. 
     
     
         2 . The electronic cigarette according to  claim 1 , wherein the mouthpiece vice cover includes a cylindrical vice cover body formed by combination of a top wall and a side wall and comprising a vice cover cooling cavity, the vent column is formed inside of the mouthpiece vice cover and extends axially from the top wall to the atomizer direction, the vent hole of the mouthpiece vice cover is formed inside the vent column and allows for the vice cover cooling cavity communicating with external air of the electronic cigarette, and the vent hole is a bending-type vent hole which is nonlinear and bends at least once to change the smoke flow path. 
     
     
         3 . The electronic cigarette according to  claim 2 , wherein, the vent column is shaped as a cylinder and the bottom thereof is closed, an axial vent hole communicating with the external of the mouthpiece vice cover is formed inside the vent column and axially extends outward, at least one radial vent hole communicating the vice cover cooling cavity and the axial vent hole is radially provided to a part of the vent column within the vice cover cooling cavity, the bending-type vent hole is composed of the axial vent hole and the at least one radial vent hole. 
     
     
         4 . The electronic cigarette according to  claim 3 , wherein  4  radial vent holes are provided on the vent column. 
     
     
         5 . The electronic cigarette according to  claim 2 , wherein a locating rim matching the casing is formed on the top end outer side wall of the mouthpiece vice cover and radially extends outward. 
     
     
         6 . The electronic cigarette according to  claim 1 , wherein an insertion peg shaped as a cylinder is formed on the mouthpiece main cover, the vent hole of the mouthpiece main cover is provided in the middle of the insertion peg and runs through the whole mouthpiece main cover along the insertion peg. 
     
     
         7 . The electronic cigarette according to  claim 2 , wherein the mouthpiece main cover further includes a cylindrical main cover body formed by combination of a top wall and a side wall and having an accommodation cavity formed inside, the main cover body tensionally engaging with the inner side wall of the casing by the side wall thereof, the insertion peg is formed inside the mouthpiece main cover and extends axially from the top wall to the atomizer direction. 
     
     
         8 . The electronic cigarette according to  claim 1 , wherein the mouthpiece vice cover is abutted with the mouthpiece main cover. 
     
     
         9 . The electronic cigarette according to  claim 1 , wherein the mouthpiece vice cover is distanced with the mouthpiece main cover at a set distance, space in part of the casing which is between the mouthpiece main cover and the mouthpiece vice cover is deemed as a part of the cooling cavity. 
     
     
         10 . The electronic cigarette according to  claim 1 , wherein the mouthpiece main cover and the mouthpiece vice cover are both made from plastic material with good heat insulation effect.