CN212280017U - Gauze mask - Google Patents

Abstract

The utility model provides a mask, mask includes filter layer and the oral and nasal cover portion and the gas processing portion that are connected, oral and nasal cover portion encloses into facial accommodation space with gas processing portion, the opening of oral and nasal cover portion is towards facial accommodation space, oral and nasal cover portion is provided with the gas cavity room, gas channel has been seted up in the mask, gas channel's both ends are provided with first blow vent and second blow vent respectively, first blow vent sets up the inside wall in oral and nasal cover portion and communicates with the gas cavity room, the second blow vent sets up in gas processing portion and communicates with outside atmosphere, gas processing portion includes casing and filter layer, oral and nasal cover portion and casing are made by airtight material, the filter layer setting is in gas processing portion and is located the gas channel. The mask can improve the use safety.

Description

Gauze mask

Technical Field

The utility model belongs to the technical field of respiratory filter equipment technique and specifically relates to a gauze mask is related to.

Background

The mask on the current market is one of the most daily articles used by people in daily life, the existing disposable medical mask generally comprises three layers of materials, an inner spun-bonded layer material, an outer spun-bonded layer material and a middle melt-blown material, the inner spun-bonded layer material and the outer spun-bonded layer material are usually made of polypropylene materials, gaps among the materials are large, the outer layer can be subjected to waterproof treatment and has the function of preventing liquid from splashing, the inner layer mainly absorbs moisture and water released by a wearer, the gaps among the melt-blown materials of the middle layer are small, impurities are removed through the size of gaps among the melt-blown layers and the effect of electrostatic adsorption, the middle layer is taken as a barrier layer and mainly blocks viruses and bacteria, and the middle melt-blown layer subjected to electrostatic treatment is used for adsorbing charged micro bacteria and.

The existing mask only has a protection effect, except for preventing dust, mainly prevents flying virus and bacteria particles with sneezes and the like of people around, and cannot kill germs by spraying disinfectant and other modes. In addition, the spreading of the flying virus and bacteria particles in the sneeze is mainly dispersed and spread forwards along the sneeze direction of people, so the front of the traditional mask is easy to contact with the virus and bacteria along with the respiratory airflow due to the large contact area, and the virus can not be killed directly on the mask, so the virus has an opportunity to penetrate through the mask and enter the human body. In addition, the traditional mask is bi-directionally ventilated, so that the exhaled air flow easily floats upwards due to the blocking of the mask to cause fog, and particularly, the mask is very inconvenient to use with glasses.

Disclosure of Invention

The utility model aims at providing a prevent that expired gas from upwards waving out makes gauze mask of glasses hazing.

In order to realize the above-mentioned purpose, the utility model provides a mask, including filter layer and the mouth nose cover portion and the gas treatment portion that are connected, mouth nose cover portion encloses into facial accommodation space with the gas treatment portion, the opening of mouth nose cover portion is towards facial accommodation space, mouth nose cover portion is provided with the gas cavity, gas channel has been seted up in the mask, gas channel's both ends are provided with first blow vent and second blow vent respectively, first blow vent sets up at the inside wall of mouth nose cover portion and communicates with the gas cavity, the second blow vent sets up in the gas treatment portion and communicates with outside atmosphere, gas treatment portion includes casing and filter layer, mouth nose cover portion and casing are made by airtight material, the filter layer sets up in the gas treatment portion and is located the gas channel.

According to the scheme, the mask body is provided with the mouth and nose covering part and the air treatment part, the air treatment part is provided with the filter layer, and the filter layer is arranged in the air treatment part. In addition, the second air vent is positioned on the air treatment part at the side part of the human face, so that the exhaled air can not float upwards from the mouth-nose covering part to fog the glasses.

Preferably, the first vent and the second vent are located on opposite sides of the gas treatment section.

It can be seen that the arrangement is such that the first vent is located on the front side of the face and the second vent is located on the rear side of the face, thereby further avoiding the exhaled air from drifting upwards and fogging the glasses. In addition, the outer surface of the mask has no holes, so that the mask can be better disinfected.

In a further aspect, the second vent is located on a sidewall of the gas processing portion facing the facial receiving space.

Therefore, the second vent is located on the side wall of the gas processing part facing the face containing space, when a human body wears the mask, the second vent is located between gaps between the mask and the human face, on one hand, gas with viruses can be prevented from being inhaled, and on the other hand, the exhaled gas can be prevented from enabling glasses to be fogged. Meanwhile, 75% of alcohol and other disinfectant can be sprayed on the whole outer surface of the mask for disinfection treatment.

Still further, the gas processing part is provided with at least two supporting protrusions on the side wall provided with the second vent, and the upper side and the lower side of the second vent are respectively provided with at least one supporting protrusion.

Therefore, the arrangement of the supporting protrusions is used for ensuring that a gap is formed between the second vent and the face of a person, ensuring the smoothness of inspiration and expiration and preventing the second vent from being blocked due to the fact that the gas processing part is tightly attached to the face of the person.

Preferably, the second vent is located in a bottom wall of the gas treatment section.

It can be seen that the second vent is remote from the eyes of the person and therefore the gas exiting the second vent does not mist the glasses.

One preferred scheme is that, the gas treatment portion includes treatment portion and exhaust treatment portion of admitting air, treatment portion and exhaust treatment portion of admitting air set up the left and right sides in oronasal cover portion respectively, gas passage includes inlet channel and exhaust passage, inlet channel extends to treatment portion of admitting air from oronasal cover portion, exhaust passage extends to treatment portion of exhausting air from oronasal cover portion, first air vent includes exhaust passage entry and inlet channel export, the second air vent includes exhaust passage export and inlet channel entry, the exhaust passage export is located the treatment portion of exhausting air, the inlet channel entry is located treatment portion of admitting air.

Therefore, the air inlet processing part and the air outlet processing part are respectively arranged at the left side and the right side of the mouth-nose covering part, so that the air inlet channel and the air outlet channel are separately arranged, and the use safety of the mask is improved.

The mask further comprises an air inlet one-way valve and an air exhaust one-way valve, the mouth and nose cover is internally provided with an air groove, the opening of the air groove faces the air chamber, the air inlet one-way valve and the air exhaust one-way valve are both installed at the opening of the air groove, the first air vent is located on the inner wall of the air groove, and the air passage is communicated with the air chamber through the air groove.

It can be seen that on inhalation, the inlet check valve opens and gas enters the gas chamber from the inlet passage. Upon exhalation, the exhaust check valve opens and gas is exhausted from the gas chamber to the outside atmosphere through the exhaust passage.

The gas channel comprises a plurality of main body gas channel sections and a plurality of processing part gas channel sections which are communicated with each other, and the plurality of main body gas channel sections are radially arranged by taking the axis of the vent groove as the center. First blow vent is located the first end of main part air flue section, and a plurality of first blow vents evenly arrange along the internal perisporium of air vent groove, and the second end and the processing portion air flue section of main part air flue section are connected.

Therefore, the arrangement of the main body air passage sections can ensure that the inside of the mask is ventilated smoothly, and the phenomenon that the mask is stuffy is prevented.

The air inlet channel is communicated with the air inlet channel, and the air outlet channel is communicated with the air outlet channel.

Therefore, the arrangement of the partition plate enables the air inlet channel and the air outlet channel to be completely separated, and the use safety of the mask is improved.

The mask comprises a mask body, a mask cover, an exhaust valve assembly, a ventilation groove, an air inlet check valve, an air outlet check valve and ventilation water filtering cotton.

Therefore, the air inlet one-way valve and the air exhaust one-way valve are both arranged on the mouth cover through the valve seats, and the connection stability of all the parts is improved.

Preferably, the housing comprises a base and an end cover which are fixedly connected detachably, the base and the end cover are fixedly connected detachably, the base is fixedly connected with the mouth and nose covering part, and the filter layer is clamped between the base and the end cover.

Therefore, the base is fixedly connected with the end cover in a detachable mode, so that the filter layer in the gas treatment part is replaced conveniently, and the mask is recycled. In addition, the exhaust filter layer located in the exhaust treatment portion may be attached or detached as necessary.

The gas treatment part further comprises a sealing gasket, and the sealing gasket is arranged between the filter layer and the base.

Further, the mouth and nose covering part and the base are integrally formed.

Therefore, the number of parts is less, and the assembly is convenient.

Preferably, the mouth and nose covering part is made of plastic, silica gel or metal materials.

Therefore, the medicine or the treatment liquid for killing bacteria and viruses, such as common 75% alcohol and the like, can be directly sprayed on the outer surface of the mouth and nose covering part, so that a better disinfection effect is achieved.

Preferably, the oronasal cover is made of a transparent material.

Therefore, the mouth and nose covering part is made of transparent materials, and the sheltered face of a wearer can be clearly seen when the mask is used.

Preferably, an elastic sealing element is arranged on the circumference of the opening end of the mouth-nose covering part.

Therefore, when the mask is worn, the elastic sealing element can be attached to the face of a human body in a sealing mode, the air in the air cavity chamber is prevented from being exposed from a gap between the mouth and nose covering portion and the face of the human body, and the sealing performance of the mask is improved.

Drawings

Fig. 1 is a view showing a first view angle of the mask of the present invention.

Fig. 2 is a second view angle diagram of the mask of the present invention.

Fig. 3 is an exploded view of the mask of the present invention.

Fig. 4 is an exploded view of the mask body and the exhaust valve assembly in the mask of the present invention.

Fig. 5 is a cross-sectional view of a first viewing angle of the mask of the present invention.

Fig. 6 is a cross-sectional view of a second viewing angle of the mask of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Referring to fig. 1 and 2, the mask of the present embodiment includes a mask body 1, a gas treatment part, a discharge valve assembly 4, and a strap 5. The gas processing portion includes admit air processing portion 2 and exhaust-gas treatment portion 3, admit air processing portion 2 and exhaust-gas treatment portion 3 and set up respectively in the 1 left and right sides of gauze mask body, admit air processing portion 2 and be on a parallel with exhaust-gas treatment portion 3, admit air processing portion 2, gauze mask body 1 and 3 inside facial accommodation space 10 that enclose of exhaust-gas treatment portion, after the gauze mask is taken to the human body, admit air processing portion 2, gauze mask body 1 and exhaust-gas treatment portion 3 cover human face to fix through bandage 5.

Referring to fig. 3, the mask body 1 includes a mouth-nose covering portion 12 and a circumferential extension portion 11, the mouth-nose covering portion 12 is bowl-shaped and opens toward the face accommodating space 10, the mouth-nose covering portion 12 protrudes to a side away from the face accommodating space 10 and encloses an air chamber 120 with the face of the human body. The circumferential extension 11 extends radially outward from the opening of the oronasal covering portion 12, a cylindrical vent groove 121 is formed in the oronasal covering portion 12, the vent groove 121 is located in the middle of the oronasal covering portion 12, and the opening of the vent groove 121 faces the air chamber 120. A partition plate 122 is arranged in the ventilation groove 121, the partition plate 122 divides the ventilation groove 121 into two semi-cylindrical air inlet grooves 123 and air outlet grooves 124 which are arranged along the left-right direction, and the air inlet grooves 123 and the air outlet grooves 124 are arranged at intervals and are not communicated with each other.

Referring to fig. 3 and 4, the air discharge valve assembly 4 includes a valve seat 41, an air inlet check valve 42, an air discharge check valve 43, and air-permeable water-filtering cotton 44. The valve seat 41 is fixed and covers the open end at the air channel 121, the air inlet check valve 42 and the air outlet check valve 43 are both installed on the valve seat 41, the air-permeable water filtering cotton 44 and the air channel 121 are respectively located on the two opposite sides of the valve seat 41 in the front-back direction, a first installation groove 411 is formed in one side, facing the air-permeable water filtering cotton 44, of the valve seat 41, the air inlet check valve 42 is installed in the first installation groove 411, a second installation groove 412 is formed in one side, facing the air channel 121, of the valve seat 41, and the air outlet check valve 43 is installed in the second installation groove. Air inlet check valve 42 includes circular shape valve block 421 and circular shape fender lid 422, offer the through-hole that is used for communicating first mounting groove 411 and air inlet groove 123 on the diapire of first mounting groove 411, and the middle part of the diapire of first mounting groove 411 is provided with spacing arch 4111, the periphery of fender lid 422 is provided with spacing arch 4221, valve block 421 is located and keeps off between lid 422 and the spacing arch 4111, in the front and back direction, the periphery of valve block 421 adjoins with spacing arch 4221, the middle part of valve block 421 adjoins with spacing arch 4111. The communication between the intake check valve 42 and the intake groove 123 is achieved by the deformation of the valve sheet 421. The structure of the exhaust check valve 43 is the same as that of the intake check valve 42, and will not be described in detail.

Referring to fig. 3 to 6, the intake check valve 42 is located at the outlet of the intake groove 123, and the exhaust check valve 43 is located at the inlet of the exhaust groove 124. The internal gas channel that has seted up of gauze mask, gas channel's both ends are provided with first blow vent and second blow vent respectively, and first blow vent sets up at the internal perisporium of air channel 121 and communicates with gas chamber 120, and the second blow vent sets up on gas treatment portion and communicates with outside atmosphere. The first vent and the second vent are respectively located on both sides of the gas processing portion in the front-rear direction. The second vent is located on the sidewall of the gas processing portion facing the face accommodating space 10. The gas passage includes an intake passage 6 and an exhaust passage 7, the intake passage 6 extending from the oronasal cover 12 to the intake treatment portion 2, the exhaust passage 7 extending from the oronasal cover 12 to the exhaust treatment portion 3. The first vent port includes an exhaust passage inlet 701 and an intake passage outlet 602, the second vent port includes an exhaust passage outlet 702 and an intake passage inlet 601, the exhaust passage outlet 702 is located on the exhaust treatment portion 3, the plurality of exhaust passage inlets 701 are arranged on the inner peripheral wall of the exhaust groove 124 in the circumferential direction, the intake passage inlet 601 is located on the intake treatment portion 2, and the plurality of intake passage outlets 602 are evenly arranged on the inner peripheral wall of the intake groove 123 in the circumferential direction.

The intake passage 6 includes a main body air passage section 61 and a treatment section air passage section 62 which are communicated with each other, an intake passage inlet 601 is an inlet of the treatment section air passage section 62, and an intake passage outlet 602 is an outlet of the main body air passage section 61.

The main body air duct section 61 extends from the inner peripheral wall of the air inlet groove 123 to the connection position of the circumferential extension part 11 and the air inlet processing part 2 along the mouth and nose covering part 12 in the mask body 1, the inlet 611 of the main body air duct section 61 is positioned on the side wall of the circumferential extension part 11, the outlet 621 of the processing part air duct section 62 is connected with the inlet 611 of the main body air duct section 61, and the inlet of the processing part air duct section 62 is positioned on one side of the air inlet processing part 2 away from the mask body 1.

The intake air processing portion 2 includes an intake housing, an intake gasket 22, and an intake filter layer 23. The air inlet shell comprises an air inlet base 21 and an air inlet end cover 24 which are fixedly connected in a detachable mode, the air inlet end cover 24 is arranged on one side, facing the facial accommodating space 10, of the air inlet base 21, the air inlet base 21 is fixedly connected with the mask body 1, the air inlet filter layer 23 is clamped between the air inlet base 21 and the air inlet end cover 24, and the air inlet sealing gasket 22 is arranged between the air inlet filter layer 23 and the air inlet base 21. The air inlet filter layer 23 divides a space enclosed by the air inlet base 21 and the air inlet end cover 24 into a first air inlet area 241 and a second air inlet area 242, an air inlet channel inlet 601 is communicated with the first air inlet area 241, the air inlet channel inlet 601 is located at the rear side of the air inlet processing part 2 and is located on the side wall of the air inlet end cover 24 facing the face accommodating space 10.

The intake passage outlet 602 communicates with the second intake area 242. The air inlet sealing gasket 22 is arranged between the air inlet filtering layer 23 and the air inlet base 21, and the air entering the air inlet passage 6 is filtered by the air inlet filtering layer 23 and then discharged from the air inlet passage outlet 602.

Be provided with annular elastic sealing member 13 in the circumference of oronasal cover portion 12 open end, this elastic sealing member 13's setting makes the human body when wearing the gauze mask, and oronasal cover portion 12's open end can be better with the laminating of people's face, improves the leakproofness of gauze mask.

The exhaust gas treatment section 3 includes an exhaust casing, an exhaust gasket 32, and an exhaust filter layer 33. The exhaust casing comprises an exhaust base 31 and an exhaust end cover 34 which are fixedly connected detachably, and the exhaust end cover 34 is arranged on one side of the exhaust base 31 facing the face accommodating space 10. The mask body 1, the air inlet shell and the air outlet shell are all made of air-tight materials. The air impermeable material may be a plastic, for example, a material formed of an elastic material such as TPU or a rigid ABS material, or a combination thereof. The air-impermeable material can also be silica gel or metal. The exhaust end cover 34 and the air inlet end cover 24 are both positioned between the exhaust base 31 and the air inlet base 21, the exhaust base 31 is fixedly connected with the mask body 1, and the exhaust filter layer 33 is clamped between the exhaust base 31 and the exhaust end cover 34. The exhaust gasket 32 is arranged between the exhaust filter layer 33 and the exhaust base 31, and the gas in the exhaust channel 7 is filtered by the exhaust filter layer 33 and then is discharged to the external atmosphere. The mask body 1, the air inlet shell and the air outlet shell are made of transparent materials, so that the face sheltered by a wearer can be clearly seen while protection is achieved.

Each exhaust passage 7 communicates with the exhaust groove 124, a plurality of exhaust passage inlets 701 are uniformly arranged on the inner circumferential wall of the exhaust groove 124 along the circumferential direction, and an exhaust passage outlet 702 is located on the exhaust treatment section 3 and communicates with the outside atmosphere.

The exhaust passage 7 comprises a main body air passage section 71 and a treatment section air passage section 72 which are communicated with each other, an inlet 701 of the exhaust passage is an inlet of the main body air passage section 71, and an outlet 702 of the exhaust passage is an outlet of the treatment section air passage section 72. The number of the main body air passage sections 61 and the main body air passage sections 71 is plural, and the plurality of main body air passage sections 61 and the main body air passage sections 71 are radially arranged with the axis of the vent groove 121 as the center.

The main body air duct section 71 extends from the inner peripheral wall of the exhaust groove 124 to the connection position of the circumferential extension part 11 and the exhaust treatment part 3 along the oral-nasal covering part 12 in the mask body 1, the outlet 711 of the main body air duct section 71 is positioned on the side wall of the circumferential extension part 11, the treatment part air duct section 72 is a space enclosed by the exhaust base 31 and the exhaust end cover 34, the exhaust filter layer 33 divides the treatment part air duct section 72 into a first exhaust area 311 and a second exhaust area 312, the exhaust passage inlet 701 is communicated with the first exhaust area 311, and the exhaust passage outlet 702 is communicated with the second exhaust area 312. The inlet 3111 of the first exhaust zone 311 is connected to the outlet 711 of the body air duct section 71. The exhaust passage outlet 702 is disposed opposite to the intake passage inlet 601, and the exhaust passage outlet 702 is located on the rear side of the exhaust treatment part 3 and on the side wall of the exhaust end cover 34 facing the face accommodating space 10.

Two support protrusions 343 are provided on the side wall of the exhaust end cover 34 facing the intake end cover 24, and the two support protrusions 343 are located on both sides of the exhaust passage outlet 702 in the vertical direction, respectively. Two support protrusions 243 are provided on the side wall of the intake end cover 24 facing the exhaust end cover 34, the two support protrusions 243 are respectively located on both sides of the intake passage inlet 601 in the vertical direction, and one support protrusion 243 is disposed opposite to one support protrusion 343. The minimum distance between the supporting protrusion 343 and the supporting protrusion 243 is smaller than the minimum distance between the exhaust passage outlet 702 and the intake passage inlet 601. Thus, after the mask is worn, gaps can be formed between the exhaust channel outlet 702 and the air inlet channel inlet 601 and the face of a person, so that wearing and breathing are smooth.

Bandage 5 is made by elastic material, and the first end of bandage 5 is connected and is kept away from one side of gauze mask body 1 on the processing portion 2 admits air, and the second end of bandage 5 is connected and is kept away from one side of gauze mask body 1 on exhaust treatment portion 3, and bandage 5 is used for fixing the gauze mask at human face.

The working method of the mask comprises the following steps: when inhaling, the air inlet check valve 42 is opened, the air outlet check valve 43 is closed, and the air enters from the inlet 601 of the air inlet channel, is filtered by the air inlet filter layer 23, enters the air inlet groove 123 from the outlet 602 of the air inlet channel, and is inhaled into the human body after passing through the air inlet check valve 42. When the human body exhales, the air inlet one-way valve 42 is closed, the air outlet one-way valve 43 is opened, and the gas exhausted by the human body enters the air exhaust groove 124 through the air exhaust one-way valve 43, passes through the air exhaust channel 7, is filtered by the air exhaust filter layer 33 and is exhausted from the air exhaust channel outlet.

It is thus clear that because the casing of gauze mask body and gas processing portion is made by airtight material, the filter layer setting is in the inside of admitting air processing portion, consequently can directly spray the antiseptic solution outside the gauze mask body, carries out disinfection treatment to the gauze mask. Because the outer surface is the infectious sources such as the bacterial virus that most easily contacts personnel's respiratory tracts such as sneeze and exhale after the gauze mask is worn, consequently if can directly kill the infectious sources who contacts then will very big promotion protective effect on its surface, and the surface of the gauze mask of the utility model is airtight, just so can satisfy according to the protection requirement before wearing to spray the medicine or the treatment fluid such as 75% alcohol etc. of killing the bacterial virus on its surface. After wearing the mask, since only the inlet and outlet of the intake passage hidden on the side opposite to the side of the wearer's face are exposed to the outside, the exposed area is greatly reduced, and the inlet and outlet of the intake passage are between the wearer's face and the mask, thereby achieving better protection. Meanwhile, the outlet of the exhaust channel is far away from the eyes of a wearer, so that the situation that the wearer has fog to shield the eyes or the glasses after wearing the glasses can be avoided. Exhaust base and exhaust end cover detachably fixed connection to be convenient for replace the exhaust filter layer of exhaust-gas treatment portion, the base that admits air and inlet end cover detachably fixed connection, thereby be convenient for replace the filter layer that admits air of admitting air treatment portion, realize recycling of gauze mask.

Furthermore, the second vent may also be located on the bottom wall of the gas treatment section, i.e. the inlet channel inlet is located on the bottom wall of the gas treatment section and/or the outlet channel outlet is located on the bottom wall of the exhaust treatment section. When the protection requirement is low, an exhaust filtering layer is not arranged in the exhaust treatment part, namely, the exhaled gas does not pass through the exhaust filtering layer after passing through the exhaust channel and is directly discharged into the atmosphere. The exhaust base, the air inlet base and the mask body can also be integrally formed. The mask body, the air inlet base and the air outlet base can also be processed and formed by a three-dimensional printing method, and when the mask body, the air inlet base and the air outlet base are processed and formed by the three-dimensional printing method, the mask body, the air inlet base and the air outlet base can be designed more individually and can be matched with the human face more, and the wearing comfort is improved. The gas treatment part can also only comprise an air inlet treatment part or an air outlet treatment part, in this case, an air inlet one-way valve and an air outlet one-way valve are not required to be arranged, and the gas channel has the functions of air inlet and air outlet at the same time. Above-mentioned scheme also can realize the utility model discloses an aim.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, and are not intended to limit the scope of the present invention, as those skilled in the art will appreciate that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended to cover all such modifications, equivalents, and improvements as fall within the true spirit and scope of the invention.

Claims (16)

1. The mask is characterized by comprising an oral-nasal covering part and an air treatment part which are connected, wherein the oral-nasal covering part and the air treatment part enclose a facial accommodating space;

the opening of the mouth-nose covering part faces the face accommodating space, and the mouth-nose covering part is provided with an air chamber;

an air channel is formed in the mask, a first vent and a second vent are respectively arranged at two ends of the air channel, the first vent is arranged on the inner side wall of the mouth and nose covering part and communicated with the air chamber, and the second vent is arranged on the air processing part and communicated with the external atmosphere;

the gas treatment part comprises a shell and a filter layer, the mouth and nose covering part and the shell are both made of air-proof materials, and the filter layer is arranged in the gas treatment part and positioned in the gas channel.

2. The mask of claim 1 wherein:

the first vent and the second vent are located on opposite sides of the gas treatment section.

3. The mask of claim 2 wherein:

the second vent is located on the side wall of the gas processing part facing the face accommodating space.

4. The mask of claim 3 wherein:

the side wall of the gas processing part provided with the second vent is provided with at least two supporting protrusions, and the upper side and the lower side of the second vent are respectively provided with at least one supporting protrusion.

5. The mask of claim 1 wherein:

the second vent is located on a bottom wall of the gas processing portion.

6. The mask according to any one of claims 1 to 5, wherein:

the gas treatment part comprises an air inlet treatment part and an exhaust treatment part, and the air inlet treatment part and the exhaust treatment part are respectively arranged at the left side and the right side of the mouth and nose covering part;

the gas passage comprises an air inlet passage and an air outlet passage, the air inlet passage extends from the oral-nasal covering part to the air inlet treatment part, and the air outlet passage extends from the oral-nasal covering part to the air outlet treatment part;

the first vent includes an exhaust passage inlet and an intake passage outlet, and the second vent includes an exhaust passage outlet and an intake passage inlet;

the exhaust passage outlet is located on the exhaust treatment portion, and the intake passage inlet is located on the intake treatment portion.

7. The mask of claim 6 wherein:

the gauze mask still includes air intake check valve and exhaust check valve, open mouth and nose cover portion is interior to be equipped with the air channel, the opening orientation of air channel the air cavity room, air intake check valve with exhaust check valve all installs the opening part of air channel, first blow vent is located on the inner wall of air channel, gas passage passes through the air channel with the air cavity room intercommunication.

8. The mask of claim 7 wherein:

the gas channel comprises a plurality of main body gas channel sections and a plurality of treatment part gas channel sections which are communicated with each other, and the plurality of main body gas channel sections are radially arranged by taking the axis of the vent groove as the center;

the first air vents are located at the first end of the main body air channel section, the first air vents are uniformly arranged along the inner peripheral wall of the vent groove, and the second end of the main body air channel section is connected with the treatment part air channel section.

9. The mask of claim 7 wherein:

the air inlet channel is communicated with the air inlet channel, and the air exhaust channel is communicated with the air exhaust channel.

10. The mask of claim 7 wherein:

the mask also comprises an exhaust valve assembly, wherein the exhaust valve assembly comprises a valve seat, the air inlet one-way valve, the exhaust one-way valve and the breathable water filtering cotton;

the air inlet one-way valve and the air outlet one-way valve are both installed on the valve seat, the air-permeable water filtering cotton and the air channel are respectively located on two opposite sides of the valve seat, the air inlet one-way valve is installed on one side, facing the air-permeable water filtering cotton, of the valve seat, and the air outlet one-way valve is installed on one side, facing the air channel, of the valve seat.

11. The mask according to any one of claims 1 to 5, wherein:

the shell comprises a base and an end cover which are fixedly connected in a detachable mode, the base is fixedly connected with the mouth and nose covering portion, and the filter layer is clamped between the base and the end cover.

12. The mask of claim 11 wherein:

the gas treatment part also comprises a sealing gasket, and the sealing gasket is arranged between the filter layer and the base.

13. The mask of claim 11 wherein:

the mouth and nose covering part and the base are integrally formed.

14. The mask according to any one of claims 1 to 5, wherein:

the mouth and nose covering part is made of plastic, silica gel or metal materials.

15. The mask according to any one of claims 1 to 5, wherein:

the mouth-nose covering part is made of transparent material.

16. The mask according to any one of claims 1 to 5, wherein:

an elastic sealing element is arranged on the circumference of the opening end of the mouth-nose covering part.

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