Mask exhalation valve

Abstract

The invention discloses a mask exhalation valve which comprises an upper cover, a valve base and a valve block. An upward boss is arranged on the valve base, and the upper surface of the boss is of a spherical structure. A locating column is arranged in the center of the upper surface of the boss, a groove is formed in the upper surface of the boss, and exhalation holes are formed between the groove and the locating column. A containing cavity for containing the boss is formed in the upper cover, a locating block is arranged in the center of the containing cavity, a locating hole is formed in the center of the locating block, and a plurality of air outlet holes are formed in the upper cover. The valve block is a flexible sheet, a through hole is formed in the center of the valve block, and a protruding rib is arranged on the edge of the valve block. The cavity and the boss are provided with mutually-embedded structures, the valve base and the upper cover are connected together through the embedded structures, the locating column penetrates the through hole and the locating hole to be connected with the locating block, and the protruding rib of the valve block is located in the groove of the boss. The exhalation holes are formed in the boss of the spherical structure, so that exhalation is more smooth; and the groove is formed in the upper surface of the boss, and the protruding rib is arranged on the edge of the valve block and located in the groove, so that gas tightness is good.

Description

technical field [0001] The invention relates to an exhalation valve, in particular to an exhalation valve for a mask. Background technique [0002] In daily life and medical fields, masks are more and more widely used. Traditional masks cover the mouth and nose when in use, although they block external harmful substances, etc., but the exhaust gas discharged by the wearer cannot be quickly eliminated. In addition, when a cold occurs, the high-temperature breathing environment intensifies the water vapor content in the atmosphere of the mouth and nose, resulting in dry mouth and nose, poor comfort, which is not conducive to the health of the wearer. Add a mask exhalation valve to the mask can solve this problem very well. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a mask exhalation valve with good air tightness and smooth exhalation. In order to achieve the above-mentioned technical effect, the technical sc...

AI Technical Summary

Problems solved by technology

[0002] In daily life and medical fields, masks are more and more widely used. Traditional masks cover the mouth and nose when in use, although they block external harmful substances, etc., but the exhaust gas discharged by the wearer cannot be quickly eliminated. In addition, when a cold occurs, the high-temperature breathing environment intensifies the water vapor content in the atmosphere of the mouth and nose, resulting in dry mouth and nose, poor comfort, which is not conducive to the health of the wearer. Add a mask exhalation valve to the mask can solve this problem very well

Images