CN218571467U - Medical protective mask - Google Patents

Abstract

The utility model discloses a medical protective mask, which comprises a mask body, a fixed head band, an air suction one-way valve, an air expiration one-way valve and a sound channel device; the mask body comprises a first protection part and a second protection part which are of an integrated structure, and the expiration one-way valve is arranged on the second protection part; on the valve casing was located to the lid that admits air, cassette detachably installed on the valve casing, and the check valve piece fixed mounting that admits air is on the valve casing, and the valve casing is equipped with the gas outlet, and the direction of giving vent to anger of this gas outlet is towards first protection portion. The medical protective face mask plays the effect of eye, mouth, nose integral type isolation protection, and the gas outlet guides the air current to flow into first protection portion, and the effect through the air current is detached the fog on the first protection portion, prevents that water smoke from condensing on transparent material's first protection portion, and then avoids influencing wearer's sight, and the sound channel device plays the effect of sound conduction, and removable cassette requires to use different filter coefficient's cassette according to the filtration level, and the suitability is more extensive.

Description

Medical protective mask

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to medical protection casing.

Background

In recent years, the demand for protection against viruses is continuously increasing, and the demand for protection against viruses is also continuously increasing, and particularly, for the demand for protection against the face, the comprehensive protection against the viruses and pathogenic bacteria in eyes, nose and mouth is required. The respirator is too heavy and expensive to wear for a long time. As the gas mask is made of thick materials, the wearer can not easily send out the sound through the mask, and the wearer can not easily communicate with the outside world through language, so the gas mask is less used for being worn by virus prevention and control detection medical or epidemic prevention personnel. However, people generally wear masks, eyeshades and masks to protect against epidemic diseases.

This kind of eye-shade, face guard, gauze mask wearing method have a great deal of inconvenience, and loaded down with trivial details to the protective effect is relatively poor, if: the protection of the face mask only can prevent the eyes from being injured by splashes and water stains, but cannot prevent the invasion of harmful viruses and germs; although the eyeshade can prevent the invasion of viruses and germs when being worn, the eyeshade is easy to fog on the lens of the eyeshade under the condition of eye water secreted by eyes, the fogged eyeshade seriously influences the sight of a wearer, and the serious person can hardly see objects and the front of the eyes are blurred; when the mask is worn to breathe, water is easily collected on the inner surface of the mask, the water collecting surface is in long-time contact with skin of a wearer, skin soaking and ulceration are easily caused, bacteria are easily bred on the water collecting mask, and hidden dangers are brought to the wearer. In particular to epidemic prevention medical care personnel and inspection and detection personnel, the wearing time of the protective appliance is long, and the risks of injury and infection protection are higher. Moreover, most of the traditional masks, eye-protection shields and the like are disposable articles, can not be recycled, and easily causes resource waste.

Moreover, because the mask is not transparent, and epidemic prevention personnel need to wear the protective clothing, the epidemic prevention personnel often can not identify the other party at all, and only can write the name of the protective personnel on the protective clothing for identification.

Therefore, the medical protective full mask which solves the problem of eye, nose and mouth integrated protection, can remove the water vapor condensation exhaled by a wearer, has high mutual recognition degree, is convenient to wear and does not influence the normal activities of workers is really necessary.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a medical protection casing.

The technical scheme is as follows:

a medical protective mask comprises a mask body, a fixed head band, an inspiration one-way valve, an expiration one-way valve and a sound channel device; the mask body comprises a first protection part and a second protection part which are of an integrated structure, the first protection part is positioned above the second protection part, at least part of area of the first protection part is made of transparent material, the inspiration one-way valve is installed on the first protection part or installed on one of two sides of the first protection part, and the expiration one-way valve is installed on the second protection part; the air suction one-way valve at least comprises an air inlet cover, a filter plate, a valve shell and an air inlet one-way valve plate, wherein the air inlet cover is arranged on the valve shell, the filter plate is detachably arranged on the valve shell, the air inlet one-way valve plate is fixedly arranged on the valve shell, the valve shell is provided with an air outlet, and the air outlet direction of the air outlet faces to the first protection part; expiration check valve is including disk seat, check valve diaphragm and protective cover, the equal fixed mounting of individual term valve diaphragm and protective cover in on the disk seat, the check valve diaphragm is located between disk seat and the protective cover.

The mask body which consists of a first protection part and a second protection part in an integrated structure is worn on the head of a human body to play a role in isolation and protection, and the protection area of the mask body is eye, mouth and nose integrated protection;

after the medical protective face mask is worn by a wearer, an isolation space isolated from the outside is formed between the face of the wearer and the cover body, the body temperature and the breathing action of the wearer in the isolation space are lower, the temperature in the isolation space is higher than the outside space, a temperature difference zone is formed inside and outside the isolation space, water vapor distributed out from the surface of a face pore and an eyeball surface of the wearer is used, and the water vapor in the exhalation of the wearer meets the cover body with the temperature difference, the saturation of the gas water vapor rapidly drops, interference water is taken out from the gas, the taken water rapidly forms water mist to be condensed on the first protective part and the second protective part, due to the rising effect of the water mist, particularly, the water mist condensation in the first protective part is most concentrated, and the sight of the wearer is sheltered. When a wearer self-inhales air, a negative pressure space with air pressure lower than the outside is generated in the cover body, the outside air jacks up an air inlet one-way valve disc of an air inlet one-way valve under atmospheric pressure, the air firstly enters through the air inlet cover and is filtered through the filter disc, the filtered air sequentially passes through the air inlet one-way valve disc and the valve shell, the air outlet direction of the air outlet of the valve shell faces towards the first protection part, the air outlet guides airflow to flow to the first protection part, the temperature of the outside air rises after entering the cover body, the gas water vapor saturation is reduced, the gas water vapor saturation is lower due to the fact that the outside entering air is lower, the gas temperature rise and the water vapor saturation is lower, and when the relatively dry gas flows through the first protection part stuck with water mist, the water mist on the first protection part is quickly sucked into the gas by the dry air flow; the transparent cover casing which loses the water mist adhesion recovers transparency, the sight line of a wearer also recovers to be normal, and the gas which increases the water vapor saturation is beneficial to the breathing of the wearer; the fog on the first protection part is removed through the action of the airflow, and the water fog is prevented from being condensed on the first protection part made of the transparent material, so that the sight of a wearer is prevented from being influenced;

the wearer inhales and then discharges the air from the exhalation one-way valve, the one-way valve membrane can prevent the external air from flowing backwards, and the valve seat and the protective cover both play a role in fixing and protecting the one-way valve membrane; the sound channel device utilizes the principle that the film sheet is easy to conduct airflow vibration and is air-tight, plays a role in sound conduction, and facilitates normal language communication when a wearer wears the medical protective mask;

because the filtering time of the filter is limited, the filter is designed to be replaceable, after the filter is detached from the air suction one-way valve, the air exhaust one-way valve, the sound channel device and the mask body can be disinfected, and the medical protective mask after the mask is cleaned, disinfected and dried and is provided with a new filter again can be recycled, so that resources are saved.

The first protection part is provided with a top, the top is provided with a first mounting hole position, the first mounting hole position is arranged on the left side and the right side of the top or on the upper side, the first mounting hole position is arranged on the left side and the right side of the top or on the single side of the top, and the air suction one-way valve is fixed on the first mounting hole position; the second protection part is provided with a second mounting hole site and a third mounting hole site, the expiration one-way valve is fixed on the second mounting hole site, and the sound channel device is fixed on the third mounting hole site.

The first installation hole site that the top set up is in order to be used for the installation check valve of breathing in, and the gas that gets into from the check valve of breathing in can be blown downwards to first guard portion to one side, and second installation hole site and third installation hole site are used for installing expiration check valve and sound channel device respectively.

The sound channel device comprises a fixed cover, a sound film and a fixed ring, the sound film is fixedly arranged on the fixed cover through the fixed ring, and the fixed cover is fixedly connected with the third mounting hole in a hot pressing or bonding mode.

The retainer plate can be fixed the sound membrane steadily and cover fixedly, and in this technical scheme, the sound membrane is the airtight diaphragm of ultra-thin elasticity, and when the wearer speaks, the conduction effect through the sound membrane spreads out sound, has further avoided making the wearer can't carry out normal interchange because the cover body is sealed, reason such as too thick.

The air suction one-way valve further comprises a pressing plate, the air inlet one-way valve sheet is firmly pressed and fixed on the valve casing through the pressing plate, and the pressing plate and the air inlet one-way valve sheet are fixed into a whole through ultrasonic heat welding or bonding.

The setting of clamp plate can seal completely external, the fixed check valve piece that admits air, and then the control inhales the effect of air current flow direction, prevents that the air current from leading to the refluence owing to leaking, and then makes the valve casing can guide the air current better and wash the region that first protection portion sight needs the clarity most.

Medical protective face mask is still including soft banding subassembly, fixed bandeau is installed on soft banding subassembly, soft banding subassembly passes through hot pressing or mode and cover body fixed connection that bonds, soft banding subassembly closely laminates through the three-dimensional profile around human engineering profile and the person's of wearing face, and with the cover body constitutes confined and external isolated isolation space.

The soft edge sealing component is closely attached to the three-dimensional contour of the periphery of the face of the wearer through the ergonomic contour, so that external unfiltered gas is prevented from entering the isolation space, and the effect of isolation and protection is achieved.

The section of the cover body in the vertical direction is in a partial oblate arc shape or in a facial makeup shape based on the ergonomic contour design.

The oblate arc shape or the facial makeup shape is selected by the wearer to meet the personal preference of the wearer.

After changing corresponding air inlet cover, medical protective mask still including can be in the performance of other equipment combined use, including interconnected air-blower, power and respiratory tube, the power is used for providing the electric energy for the air-blower, the one end and the air-blower intercommunication of respiratory tube, the air inlet cover of changing is equipped with at least one spliced eye, the other end of respiratory tube is pegged graft on this spliced eye, respiratory tube and this spliced eye intercommunication.

In this technical scheme, the inlet port of arranging is no longer established to the lid that admits air of changing, and only the pipe spliced eye of being connected with the breathing tube, and the power provides the electric energy for the air-blower, and the air-blower extraction gas gets into the breathing tube to through the spliced eye entering check valve of breathing in on the lid that admits air, this mode is admitted air for external air supply's mode.

This technical scheme provides another section lid that admits air, after changing corresponding lid that admits air, it is equipped with a plurality of inlet port to admit air the lid, and is a plurality of it sets up to be arranged to distribute to be between the inlet port. The wearer inhales by himself, and air enters the air inlet hole in the air inlet cover naturally due to the difference of air pressure inside and outside the isolation space, and the mode is self-breathing air inlet.

The medical protective mask also comprises a protective clothing head cap, the protective clothing head cap is provided with a face opening edge, and the soft edge sealing component is connected with the face opening edge of the protective clothing head cap into a whole in a sealing mode through bonding or hot welding.

The use principle of the medical protective mask is as follows:

the self-suction medical mask is worn for use: opening an air inlet cover provided with an air inlet hole, putting a filter sheet into an air suction one-way valve filter sheet installation chamber, covering the air inlet cover, wearing the cover body on the face, enabling a soft edge sealing component of the cover body to be in close contact with the face of a human body, fastening a fixed head band, and enabling the fixed head band to provide a certain direction face straight pull force for the cover body, so that the skin of the face of a wearer is in close contact with the soft edge sealing component due to the pull force, and the face and the cover body form an isolation space isolated from the outside; the water vapor and body temperature emitted by the face skin and eyes of the wearer cannot enter the atmosphere due to the formation of the isolation space; the body temperature and the moisture of a wearer form two different temperature and humidity environments inside and outside the sealed housing, and the temperature and the humidity of the environment inside the housing are obviously higher than the temperature and the humidity of the external environment, so that moisture in cold high-humidity gas forms fine water drops to be condensed on the inner surface of the housing; the condensed fine water drops absorb, scatter and block the linear propagation of light and light, the first highly transparent protective part becomes blurred, a wearer cannot see objects, if the water drops on the cover body are not processed in time, the water drops are accumulated more and more thickly, the small water drops become large water drops, the large water drops become small water flows, the flowing water is accumulated at the sealing part of the facial skin of the wearer and the soft edge sealing component, the facial skin of the wearer can be slowly festered under the condition of long-time water bubbles, and meanwhile, bacteria can be continuously bred under the high-temperature and high-humidity environment; after the self-suction medical mask is worn, a wearer starts to suck air, a negative pressure environment is generated in the mask body due to the air suction action of the wearer, an air suction one-way valve sheet is opened, outside air is sucked into the mask body through an air suction one-way valve under the condition of pressure difference, air flow firstly enters through an air inlet hole of an air inlet cover in the self-suction medical mask, the entering air is filtered to remove all substances with dust, particles, bacteria and viruses and the like exceeding the hole of a filter layer through a filter sheet, the filtered air enters the mask body on a set air flow channel through the one-way valve sheet, due to the design of an air outlet of a valve shell, the air entering the valve shell is designed to directly wash a first protection part, and due to the fact that the temperature and the humidity of the entering air are lower than those of the original air in the mask body, when the air flow passes through the first protection part condensed by fine water balls, water drops on the first protection part are sucked away by dry air, the water enters the air into the air through water vapor to improve the saturation degree of the air, and the air with the improved saturation degree is favorable for breathing; the gas flows through the first protection part before the vision and then flows through a region slightly below the first protection part before the vision, then turns to enter the nasal cavity of the human body, enters the lung for gas exchange, the exchanged gas carries a large amount of water vapor in the lung to be exhaled, the exhaled gas forms positive pressure in the cover, the valve piece of the inspiration one-way valve closes the inspiration one-way valve under the double acting force of self elastic force and pressure, and the gas flow can only flow out through the expiration one-way valve on the second protection part after the inspiration one-way valve is closed;

the air in the whole cover body flows back and forth continuously, so that the whole cover body always keeps smooth respiration circulation, and meanwhile, the cover body also always keeps dry and cool, thereby creating a comfortable respiration environment for a wearer; meanwhile, when the self-suction medical mask is worn, the face and the outside are in a closed environment, the human vocal organs are in the closed environment, the wall thickness of the mask body blocks the conduction of sound waves, and the sound channel plays a role in conducting the sound waves.

The medical face guard of external air supply formula is worn and is used: the upper cover body is worn, the soft edge sealing component is in close contact with the face of a human body, the fixed head band is worn, the breathing tube and the blower which is connected with the power supply are worn on the body, and at the moment, the air breathed by the wearer can only enter through the air suction one-way valve and is discharged from the air exhalation one-way valve;

external air enters the air suction one-way valve from the breathing pipe through the blower, at the moment, air pressure difference is formed inside and outside the cover body, the air inlet one-way valve piece is opened due to the internal and external air pressure difference, the breathing gas is firstly filtered by the filter piece to remove dust, suspended particles, germs and viruses, the filtered air sequentially passes through the air inlet one-way valve piece and the valve shell, the air outlet of the valve shell guides airflow to flow to the first protection part, fog on the first protection part is removed due to the action of the airflow, the air entering the isolation space enters the body of a wearer to be subjected to air exchange, and the exchanged air is exhaled; the exhaled air makes the inside and outside of the mask form air pressure difference again, the air inlet one-way valve sheet is closed, the air outlet one-way valve is opened, the air is exhausted from the exhalation one-way valve, a small amount of exhaled air containing high water vapor is too late, and the exhaled air and the water vapor volatilized by the subsequent skin and eyes are condensed on the inner surface of the mask body to wait for the next respiratory action;

through ventilation of the blower and the positive pressure breathing equipment or the breathing equipment, a positive pressure ventilation effect is formed in the cover body of the wearer, so that the breathing work of the wearer can be relieved, the long-time wearing breathing fatigue of the wearer can be relieved, the breathing gas source of the wearer can be transferred to be acquired at a short distance, the risk of short-distance infection is reduced, and the breathing gas quality of the wearer can be better ensured through multi-stage gas filtration before air inlet of the breathing equipment;

when the medical protective mask is worn and used for more than 4 hours and then the filter is required to be replaced, firstly, the edge and the periphery of the air inlet cover are wiped by alcohol, the air inlet cover is opened, the filter is taken out by tweezers after the air inlet cover is opened, the filter which is taken out is put into a sealed plastic bag, and then the filter in the whole plastic bag and the filter in the bag are treated according to the requirements of local regulations; the mask body, the air suction one-way valve, the air exhaust one-way valve and the sound channel device after the filter disc is taken out are all subjected to disinfection treatment, the mask body, the air suction one-way valve, the air exhaust one-way valve and the sound channel device are washed clean by clear water after disinfection and dried, and the medical protective mask after moisture drying is put into a new filter disc again for reuse.

Drawings

FIG. 1 is a schematic view of a self-priming medical face shield according to an embodiment of the present invention;

FIG. 2 is an exploded view of a self-priming medical face shield in accordance with one embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a traditional Chinese medicine protective mask according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a mask body in the shape of a facial makeup in an embodiment of the present invention;

FIG. 5 is an exploded view of the exhalation check valve in one embodiment of the present invention;

FIG. 6 is an exploded view of a center channel device according to an embodiment of the present invention;

FIG. 7 is an exploded comparative block diagram of a suction check valve according to a first embodiment and a second embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a medical face shield with an external air source according to a second embodiment of the present invention;

FIG. 9 is an exploded view of an external air supply type medical face shield according to a second embodiment of the present invention;

FIG. 10 is a diagram illustrating a second embodiment of the present invention, showing an external air source type medical protective mask in use;

FIG. 11 is a diagram illustrating a second embodiment of the present invention, showing a medical protective mask with an external air source;

description of reference numerals:

10. the mask body, 11, first protection portion, 12, second protection portion, 13, the top, 14, first installation hole site, 15, second installation hole site, 16, third installation hole site, 20, fixed bandeau, 30, the check valve of breathing in, 31, the lid that admits air, 32, the filter, 33, the valve casing, 34, the check valve piece that admits air, 35, gas outlet, 36, the clamp plate, 37, the spliced eye, 38, the inlet port, 40, the check valve of breathing in, 41, the disk seat, 42, the check valve diaphragm, 43, the protective cover, 50, the sound channel device, 51, the fixed cover, 52, the sound membrane, 53, the retainer plate, 60, soft banding subassembly, 61, the isolated space, 70, the air-blower, 80, the power, 90, the breathing tube.

Detailed Description

The following describes embodiments of the present invention in detail.

Example one

As shown in fig. 1 to 7, a medical protective mask comprises a mask body 10, a fixed head band 20, an inspiration one-way valve 30, an expiration one-way valve 40 and a sound channel device 50; the mask body 10 comprises a first protection part 11 and a second protection part 12 which are of an integrated structure, the first protection part 11 is positioned above the second protection part 12, at least partial area of the first protection part 11 is made of transparent materials, the air suction one-way valve 30 is installed on the first protection part 11, and the air exhalation one-way valve 40 is installed on the second protection part 12; the air suction one-way valve 30 at least comprises an air inlet cover 31, a filter sheet 32, a valve casing 33 and an air inlet one-way valve sheet 34, wherein the air inlet cover 31 covers the valve casing 33, the filter sheet 32 is detachably arranged on the valve casing 33, the air inlet one-way valve sheet 34 is fixedly arranged on the valve casing 33, the valve casing 33 is provided with an air outlet 35, and the air outlet direction of the air outlet 35 faces to the first protection part 11; expiratory check valve 40 includes valve seat 41, check valve diaphragm 42 and protective cover 43, and single term valve diaphragm and protective cover 43 all fix and install on valve seat 41, and check valve diaphragm 42 is located between valve seat 41 and protective cover 43.

Referring to fig. 4, in the present embodiment, the air suction check valve 30 may also be installed on one of two sides of the first protection portion 11.

Referring to fig. 1 to 3, the first protection portion 11 has a top portion 13, the top portion 13 has a first mounting hole 14, and the air suction check valve 30 is fixed on the first mounting hole 14; the second protection portion 12 is provided with a second mounting hole site 15 and a third mounting hole site 16, the expiratory check valve 40 is fixed on the second mounting hole site 15, and the sound channel device 50 is fixed on the third mounting hole site 16.

Referring to fig. 3 and 4, the first mounting hole 14 may be disposed on the top 13, or on the left and right sides of the top 13, or on only one side of the top 13.

Referring to fig. 2 and 5, the acoustic channel device 50 includes a fixing cover 51, an acoustic membrane 52, and a fixing ring 53, the acoustic membrane 52 is fixedly mounted on the fixing cover 51 through the fixing ring 53, and the fixing cover 51 is fixedly connected to the third mounting hole 16 through hot pressing or adhesion.

With continued reference to fig. 2 and 7, the suction check valve 30 further includes a pressing plate 36, the inlet check valve piece 34 is firmly fixed to the valve housing 33 by the pressing plate 36, and the pressing plate 36 and the inlet check valve piece 34 are fixed together by means of ultrasonic heat welding or bonding.

Referring to fig. 1, the medical face shield further includes a soft edge sealing assembly 60, the fixed headband 20 is mounted on the soft edge sealing assembly 60, the soft edge sealing assembly 60 is fixedly connected with the mask body 10 by hot pressing or bonding, the soft edge sealing assembly 60 is closely attached to the three-dimensional contour of the wearer's face by the ergonomic contour, and forms a closed isolation space 61 isolated from the outside with the mask body 10.

Referring to fig. 1 to 3, the cover 10 has a cross section in a vertical direction in a shape of a partial oblate arc or a facial makeup based on an ergonomic contour design.

Referring to fig. 1, fig. 2 and fig. 7, the present embodiment provides an air intake cover 31, in which the air intake cover 31 is provided with a plurality of air intake holes 38, and the plurality of air intake holes 38 are arranged and distributed.

The medical protective mask also comprises a protective clothing head cap which is provided with a face opening edge, and the soft sealing edge component 60 is connected with the face opening edge of the protective clothing head cap into a whole in a sealing way through bonding or hot welding.

The embodiment has the following advantages:

1. the mask body 10 consisting of a first protection part 11 and a second protection part 12 which are of an integrated structure is worn on the head of a human body to play a role in isolation and protection, and the protection area of the mask body 10 is used for eye, mouth and nose integrated protection;

after the medical protective face mask is worn by a wearer, an isolation space 61 isolated from the outside is formed between the face of the wearer and the mask body 10, the body temperature and the breathing action of the wearer of the isolation space 61 are lower, the temperature in the isolation space 61 is higher than the outside space, a temperature difference zone is formed inside and outside the isolation space 61, water vapor is emitted from the surface pores on the face of the wearer and the surface of an eyeball, and the water vapor in the expiration of the wearer meets the mask body 10 with the temperature difference, the saturation of the gas water vapor is rapidly reduced, interference water in the gas is taken out, the taken water rapidly forms water mist to be condensed on the first protective part 11 and the second protective part 12, and particularly the water mist is condensed most intensively in the first protective part 11 due to the rising effect of the water mist, and the sight of the wearer is shielded. When a wearer self-inhales air, a negative pressure space with air pressure lower than the outside is generated in the cover body 10, the outside air pushes open the air inlet one-way valve sheet 34 of the air suction one-way valve 30 under atmospheric pressure, the air firstly enters through the air inlet cover 31 and is filtered through the filter sheet 32, the filtered air sequentially passes through the air inlet one-way valve sheet 34 and the valve shell 33, the air outlet direction of the air outlet 35 of the valve shell 33 faces towards the first protection part 11, the air outlet 35 guides airflow to flow to the first protection part 11, the temperature of the outside air after entering the cover body 10 is increased, the saturation of air water vapor is reduced, the saturation of the outside air is lower due to the fact that the self water vapor saturation of the outside air is lower due to the temperature rise of the air, and the saturation of the air vapor is lower due to the temperature rise of the air, when the dry air flows through the first protection part 11 stuck with water mist, the water mist on the first protection part 11 is quickly sucked by the dry air flow to enter the air; the transparent cover casing which loses the water mist adhesion recovers the transparency, the sight of a wearer also recovers the normal state, and the gas which increases the water vapor saturation is beneficial to the breathing of the wearer; the mist on the first protection part 11 is removed through the action of the air flow, so that the water mist is prevented from being condensed on the first protection part 11 made of the transparent material, and the sight of a wearer is prevented from being influenced;

the wearer inhales and exhausts the air from the exhalation one-way valve 40, the one-way valve membrane 42 can prevent the air from flowing backwards, and the valve seat 41 and the protective cover 43 both play a role of fixing and protecting the one-way valve membrane 42; the sound channel device 50 plays a role in sound conduction by utilizing the principle that the film sheet is easy to conduct airflow vibration and does not leak air, and a wearer can conveniently communicate with each other in normal language when wearing the medical protective mask;

because the filtering time of the filter sheet 32 is limited, the filter sheet 32 is designed to be replaceable, after the filter sheet 32 is detached from the air suction one-way valve 30, the air exhaust one-way valve 40, the sound channel device 50 and the mask body 10 can be sterilized, and the medical protective mask with a new filter sheet 32 installed again after the mask is cleaned, sterilized and dried can be recycled, so that resources are saved, meanwhile, the replaceable filter sheet 32 can also use filter sheets 32 with different filtering coefficients according to the filtering grade requirement, and the applicability is wider.

2. The first mounting hole site 14 that the top 13 set up is used for installing inspiration check valve 30, and the gas that gets into from inspiration check valve 30 can blow down to first protection portion 11 to the slope, and second mounting hole site 15 and third mounting hole site 16 are used for installing expiration check valve 40 and sound channel device 50 respectively.

3. The fixing ring 53 can stably fix the acoustic membrane 52 on the fixing cover 51, in this embodiment, the acoustic membrane 52 is an ultrathin elastic air-tight membrane, when the wearer speaks, the sound is transmitted out through the conduction function of the acoustic membrane 52, and further, the situation that the wearer cannot normally communicate due to the sealing, too thick and other reasons of the cover body 10 is avoided.

4. The setting of clamp plate 36 can be sealed isolated external, fixed one-way valve flap 34 piece that admits air, and then control the effect that inhales the air current flow direction, prevents that the air current from leading to the refluence owing to leaking, and then makes valve casing 33 can guide the air current better and wash the area that the sight of first protection part 11 needs the clearest.

5. The soft edge sealing component 60 is closely attached to the three-dimensional contour of the periphery of the face of the wearer through the ergonomic contour, so that the external unfiltered gas is prevented from entering the isolation space 61, and the isolation and protection effects are achieved.

6. The flat arc shape or the facial makeup shape is selected by the wearer to meet the personal preference of the wearer.

7. The wearer inhales by himself, and the air inlet hole 38 on the air inlet cover 31 naturally admits air due to the difference between the internal air pressure and the external air pressure in the isolation space 61, and the mode is self-breathing type air inlet.

8. The self-suction medical face shield is worn for use: opening an air inlet cover 31 provided with an air inlet hole 38, putting a filter sheet 32 into an installation chamber of the filter sheet 32 of the air suction one-way valve 30, covering the air inlet cover 31, wearing the mask body 10 on the face, enabling a soft edge sealing component 60 of the mask body 10 to be in close contact with the face of a human body, fastening a fixed head strap 20, and enabling the fixed head strap 20 to apply a directional face straight-direction pulling force to the mask body 10, so that the skin of the face of a wearer is in close contact with the soft edge sealing component 60 due to the pulling force, and the face and the mask body 10 form an isolation space 61 isolated from the outside; the water vapor and body temperature emitted from the skin and eyes of the face of the wearer cannot enter the atmosphere due to the formation of the isolation space 61; the body temperature and the humidity of a wearer form two different temperature and humidity environments inside and outside the sealed housing, and the temperature and the humidity of the environment inside the cover body 10 are obviously higher than the temperature and the humidity of the external environment, so that moisture in cold high-humidity gas forms fine water drops to be condensed on the inner surface of the cover body 10; the condensed fine water drops absorb, scatter and block light and light from propagating linearly, the highly transparent first protection part 11 becomes blurred, a wearer cannot see objects, if the water drops on the cover body 10 are not processed in time, the water drops are accumulated more and more thickly, the small water drops become large water drops, the large water drops become small water flows, the running water is accumulated at the sealing position between the facial skin of the wearer and the soft edge sealing component 60, the facial skin of the wearer can be slowly festered under the condition of long-time water bubbles, and meanwhile bacteria can be continuously bred under the high-temperature and high-humidity environment; after the self-suction medical mask is worn, a wearer starts to suck air, due to the air suction action of the wearer, a negative pressure environment is generated in the mask body 10, a valve plate of an air suction one-way valve 30 is opened, outside air is sucked into the mask body 10 through the air suction one-way valve 30 under the condition of pressure difference, air flow firstly enters through an air inlet 38 of an air inlet cover 31 in the self-suction medical mask, the entering air is filtered to remove all substances such as dust, particles, bacteria and viruses which exceed the pore diameter of a filter layer through a filter sheet 32, the filtered air enters into the mask body 10 on a set air flow channel through the valve plate of the one-way valve, due to the design of an air outlet 35 of a valve shell 33, the air entering the valve shell 33 is designed to directly wash the first protection part 11, due to the fact that the temperature and the humidity of the entering air are lower than those of the original air in the mask body 10, when the air flow passes through the first protection part 11 condensed by a fine water balloon, the dry air sucks away water drops on the first protection part 11, water enters the water vapor to improve the saturation degree, and the water vapor saturation degree, so that the breathing is beneficial to breathing; the air flows through the first protection part 11 before the vision and then flows through the area slightly below the first protection part 11 before the vision, then turns to enter the nasal cavity of the human body, enters the lung for air exchange, the exchanged air is exhaled with a large amount of water vapor in the lung, the exhaled air forms positive pressure in the mask, the valve plate of the air inhalation one-way valve 30 closes the air inhalation one-way valve 30 under the double acting force of the elastic elasticity and the pressure of the air inhalation one-way valve 30, and the air flow can only flow out through the exhalation one-way valve 40 on the second protection part 12 after the air inhalation one-way valve 30 is closed;

the air in the whole mask body 10 flows back and forth continuously, the whole mask body 10 keeps the smooth circulation of breathing all the time, and meanwhile, the mask body 10 also keeps dry and cool all the time, so that a comfortable breathing environment is created for a wearer; meanwhile, when the self-suction medical protective mask is worn, the face and the outside are in a closed environment, the human vocal organs are in the closed environment, the wall thickness of the mask body 10 blocks the conduction of sound waves, and the sound channel device 50 plays a role in conducting the sound waves.

Example two

As shown in fig. 7 to 11, compared with the first embodiment, the present embodiment has a similar structure, but different points that the medical protective mask of the present embodiment further includes a performance that can be used in combination with other devices, such as a blower 70, a power source 80 and a breathing tube 90 that are connected with each other, the power source 80 is used for providing power to the blower 70, one end of the breathing tube 90 is communicated with the blower 70, the intake cover 31 of the present embodiment has a structure different from that of the intake cover 31 of the first embodiment, the intake cover 31 of the present embodiment does not have the intake hole 38 for natural intake air of the first embodiment, after the intake cover 31 of the present embodiment is replaced, the intake cover 31 is provided with at least one insertion hole 37, the other end of the breathing tube 90 is inserted into the insertion hole 37, and the breathing tube 90 is communicated with the insertion hole 37.

Referring to fig. 9 to 11, in the present embodiment, the replaced air intake cover 31 is not provided with the air intake holes 38, but only the tube insertion holes 37 connected to the breathing tube 90, the power source 80 provides power to the blower 70, the blower 70 draws air into the breathing tube 90 and enters the air intake check valve 30 through the insertion holes 37 on the air intake cover 31, and this mode is air intake by means of an external air source.

With continued reference to fig. 9-11, the external air source type medical mask is worn: the upper mask body 10 is worn, the soft edge sealing component 60 is in close contact with the face of a human body, the fixed head band 20 is worn, the breathing tube 90 and the blower 70 connected with the power supply 80 are worn on the body, and at the moment, the air breathed by the wearer can only enter through the inspiration one-way valve 30 and is exhausted from the expiration one-way valve 40;

the external air enters the air suction one-way valve 30 from the breathing pipe 90 through the blower 70, at the moment, air pressure difference is formed between the inside and the outside of the mask body 10, the air suction one-way valve piece 34 is opened due to the air pressure difference between the inside and the outside, the breathing air firstly passes through the filter piece 32 to be filtered by dust, suspended particles, germs and viruses, the filtered air sequentially passes through the air suction one-way valve piece 34 and the valve shell 33, the air outlet 35 of the valve shell 33 guides the air flow to the first protection part 11, the fog on the first protection part 11 is removed due to the action of the air flow, the air entering the isolation space 61 enters the body of a wearer to be subjected to air exchange, and the exchanged air is exhaled; the exhaled air makes the inside and outside of the mask form air pressure difference again, the air inlet one-way valve piece 34 is closed, the air outlet one-way valve is opened, the air is discharged from the exhalation one-way valve 40, a small amount of the exhaled air containing high water vapor is not too much time, and the air and the water vapor volatilized by the subsequent skin and eyes are condensed on the inner surface of the mask body 10 to wait for the next breathing action.

Through the ventilation of air-blower 70, malleation respiratory equipment or respiratory equipment, form the malleation effect of ventilating in the person of wearing cover 10, can alleviate the person of wearing and breathe doing work, alleviate the person of wearing and wear for a long time and breathe tired, can shift the person of wearing again simultaneously and breathe the air supply and closely acquire, reduce the risk of closely infecting to respiratory equipment's multistage gas filtration before admitting air more can guarantee the person of wearing and breathe the gas quality.

Referring to fig. 9 to 11, when the medical protective mask needs to be replaced after being worn and used for more than 4 hours, the edge and the periphery of the air inlet cover 31 are wiped by alcohol, the air inlet cover is opened, the filter 32 is taken out by tweezers after the air inlet cover 31 is opened, the taken-out filter 32 is put into a sealed plastic bag, and then the filter 32 in the whole plastic bag connected with the bag is treated according to the requirements of local regulations; the mask body 10, the air suction one-way valve 30, the air exhaust one-way valve 40 and the sound channel device 50 which are taken out of the filter sheet 32 are disinfected, washed clean by clear water after disinfection and dried, and the medical protective mask which is dried by moisture is re-installed into a new filter sheet 32 for reuse.

The above are only specific embodiments of the present invention, and the protection scope of the present invention is not limited thereby; any replacement and improvement made on the basis of not violating the conception of the utility model belong to the protection scope of the utility model.

Claims (9)

1. A medical protective mask is characterized by comprising a mask body, a fixed head band, an inspiration one-way valve, an expiration one-way valve and a sound channel device;

the mask body comprises a first protection part and a second protection part which are of an integrated structure, the first protection part is positioned above the second protection part, at least part of area of the first protection part is made of transparent material, the inspiration one-way valve is installed on the first protection part or installed on one of two sides of the first protection part, and the expiration one-way valve is installed on the second protection part;

the air suction one-way valve at least comprises an air inlet cover, a filter plate, a valve shell and an air inlet one-way valve plate, wherein the air inlet cover is arranged on the valve shell, the filter plate is detachably arranged on the valve shell, the air inlet one-way valve plate is fixedly arranged on the valve shell, the valve shell is provided with an air outlet, and the air outlet direction of the air outlet faces to the first protection part;

expiration check valve is including disk seat, check valve diaphragm and protective cover, the equal fixed mounting of check valve diaphragm and protective cover in on the disk seat, the check valve diaphragm is located between disk seat and the protective cover.

2. A medical protective mask according to claim 1, wherein the first protective portion has a top portion having first mounting holes provided on left and right sides of the top portion or on a single side of the top portion, the inhalation check valve being fixed to the first mounting holes; the second protection part is provided with a second mounting hole site and a third mounting hole site, the expiration check valve is fixed on the second mounting hole site, and the sound channel device is fixed on the third mounting hole site.

3. A medical face shield according to claim 2, wherein the acoustic channel assembly includes a mounting cap, an acoustic membrane, and a mounting ring, the acoustic membrane is fixedly mounted on the mounting cap via the mounting ring, and the mounting cap is fixedly connected to the third mounting hole by means of heat pressing or bonding.

4. A medical face shield according to claim 3, wherein said air inlet check valve further comprises a pressure plate, said air inlet check valve piece is fixedly secured to said valve housing by said pressure plate, and said pressure plate is integrally fixed to said air inlet check valve piece by means of ultrasonic heat welding or bonding.

5. The medical face shield according to claim 4, further comprising a soft edge seal assembly, wherein the fixed headband is mounted to the soft edge seal assembly, the soft edge seal assembly is fixedly attached to the mask body by heat pressing or bonding, and the soft edge seal assembly closely fits the three-dimensional contour of the wearer's face around the contour of the wearer's face by ergonomic contour and forms a closed, isolated space with the mask body.

6. A medical face shield according to claim 5, wherein the shield body has a cross-section in a vertical direction that is in the shape of a partial oblate arc or a facial makeup based on an ergonomic contour design.

7. A medical protective mask according to any one of claims 5 to 6, further comprising a head cap of a protective garment having a face opening edge, wherein the soft sealing edge member is integrated with the face opening edge of the head cap of the protective garment by bonding or heat welding.

8. A medical protective mask according to any one of claims 1 to 6, wherein the air inlet cover is provided with a plurality of air inlet holes, and the plurality of air inlet holes are distributed in an array.

9. The medical protective mask according to any one of claims 1 to 6, further comprising a blower, a power source and a breathing tube, wherein the power source is used for providing electric energy for the blower, one end of the breathing tube is communicated with the blower, the air inlet cover is provided with an insertion hole, the other end of the breathing tube is inserted into the insertion hole, and the breathing tube is communicated with the insertion hole.

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