CN111544787A

CN111544787A - Multifunctional medical protective mask

Info

Publication number: CN111544787A
Application number: CN202010445090.0A
Authority: CN
Inventors: 张正男; 韩涵; 段书霞; 佘开江; 殷苏明; 付迎坤; 段晓堂; 韩修恒; 韩伟鹤; 潘洪福; 林建香; 段玉堂; 赵欣; 王蓉; 范頔; 闫钧; 高文静; 张丹丹; 陈玮雯; 柳小军
Original assignee: Henan Yadu Industrial Co Ltd
Current assignee: Yadu Medical Technology Henan Co ltd
Priority date: 2020-05-23
Filing date: 2020-05-23
Publication date: 2020-08-18
Anticipated expiration: 2040-05-23
Also published as: CN111544787B

Abstract

The invention relates to a multifunctional medical protective mask, which effectively solves the problems that the air permeability and the protective effect of the existing mask cannot be considered at the same time, and the ear burden of a user is too large when the ear belt of the mask is worn; the technical scheme includes that the nasal cavity air pump comprises a hard arc-shaped hollow shell, one side of the shell, facing a circle center, is an inner side, and one side of the shell, away from the circle center, is an outer side, a plurality of air holes are uniformly formed in the outer side of the shell, a hollow cavity is arranged in the center of the inner part of the shell, a plurality of filter screens are uniformly and fixedly connected in the hollow cavity, one end of the hollow cavity is communicated with a transfer cavity fixedly connected in the shell, two sides of the transfer cavity are communicated with circulation cavities fixedly connected in the hollow cavity, the two circulation cavities are communicated with the outside through the air holes, a micro air pump is arranged in each of the two circulation cavities, and; the mask is simple in structure, convenient to use, capable of effectively considering both the protection effect and the air permeability of the mask, convenient to wear and high in practicability.

Description

Multifunctional medical protective mask

Technical Field

The invention relates to the technical field of masks, in particular to a multifunctional medical protective mask.

Background

With the outbreak and the flooding of epidemic diseases, the demand of people for masks is increased explosively. Because the protective effect of the medical disposable mask is short in duration and needs to be replaced frequently, the medical disposable mask is not the best choice for people who do not work on medical services, and meanwhile, a large amount of pollution is caused when the medical disposable mask is used by a large number of people.

Meanwhile, the mask in the prior art has the following defects:

1. the single-layer filter element has poor filtering and protecting effects, and the multi-layer filter element can cause the breathing of a user to be blocked, so that the breathing is influenced after the filter element is worn for a long time;

2. the ear belt of the mask has a large burden on ears of a user, and the ears are uncomfortable after being worn for a long time, even the skin is abraded;

3. the air permeability is poor, the sweat can be generated after long-time wearing, and the smell is particularly serious in hot days.

Therefore, the present invention provides a multifunctional medical protective mask to solve the above problems.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the multifunctional medical protective mask, which effectively solves the problems that the air permeability and the protective effect of the conventional mask cannot be considered at the same time, and the ear burden of a user is too large when the ear belt of the mask is worn.

The nasal cavity comprises a hard arc-shaped hollow shell, wherein one side of the shell, facing a circle center, is an inner side, and one side of the shell, far away from the circle center, is an outer side, a plurality of air holes are uniformly formed in the outer side of the shell, a hollow cavity is formed in the center of the inner part of the shell, a plurality of filter screens are uniformly and fixedly connected in the hollow cavity, one end of the hollow cavity is communicated with a transfer cavity fixedly connected in the shell, two sides of the transfer cavity are communicated with circulation cavities fixedly connected in the hollow cavity, the two circulation cavities are communicated with the outside through the air holes, a micro air pump is arranged in each of the two circulation cavities, and the upper end of the transfer cavity is communicated with a nasal cavity fixedly connected to the shell;

the nasal cavity and the transfer cavity are communicated through a nasal hole formed in the shell, the transfer cavity and the two circulation cavities are communicated through circulation holes, the transfer cavity is communicated with the outside through an air suction hole formed in the inner side of the shell, the circulation cavities are communicated with the outside through an exhalation hole formed in the inner side of the shell, and each circulation hole, the air suction hole and the exhalation hole are internally provided with a check valve.

Preferably, the transfer chamber inside top fixedly connected with the epicoele of nasal polyp chamber intercommunication, the epicoele with well cavity the transfer chamber all communicate, the epicoele both sides all communicate through circulation hole and two circulation chambeies, two the circulation downthehole check valve that all is provided with.

Preferably, the transfer cavity and the upper cavity are both internally provided with an inner guide plate fixedly connected with the side of the circulation hole, and an inner air channel is formed between the inner guide plate and the adjacent inner side wall of the shell;

the circulation intracavity be provided with the outer guide plate of one-level of fixed connection at exhaling hole side, the outer guide plate of one-level and shell inside wall form the outer gas duct of one-level, the outer guide plate of one-level and shell outside wall between form the outer gas duct of second grade, the outer guide plate of one-level be provided with the outer guide plate of second grade of fixed connection in the circulation storehouse towards the shell outside, the outer guide plate of second grade and one-level between form tertiary outer gas duct, the minimum width of locating of the outer gas duct of second grade, tertiary all be less than the minimum width of locating of interior gas duct.

Preferably, the miniature air pump be located the space that one-level outer guide plate, second grade outer guide plate and circulation chamber lateral wall formed, miniature air pump one side be provided with the trip bar of sliding connection in the circulation chamber, trip bar one end can with the switch fixed connection of miniature air pump, the trip bar other end pass adjacent one-level outer guide plate and arrange circulation hole one side in, trip bar and corresponding one-level outer guide plate between link to each other through the spring.

Preferably, two circulation chamber one side all communicate and have the air outlet cavity of fixed connection in the shell, air outlet cavity inside wall, the lateral wall of shell all seted up the bleeder vent, air outlet cavity and circulation chamber intercommunication department be provided with the current-limiting plate of fixed connection in the circulation intracavity.

Preferably, the two sides of the shell are rotatably connected with supporting rods, the two supporting rods are internally and slidably connected with lug clamps with two through sides, the upper ends of the two lug clamps are fixedly connected with threaded sleeves penetrating through the corresponding supporting rods, the two threaded sleeves are internally and respectively in threaded engagement with a pressing bolt, and a rubber thick gasket is sleeved outside the pressing screw rod.

Preferably, the two side walls of the ear clip are both connected with clamping plates in a sliding manner, and a clamping shaft with two ends respectively and fixedly connected to the two clamping plates is arranged between the two clamping plates.

Preferably, the thread bush be incomplete thread bush, the ear card on rotate be connected with the pressure move the drive screw of bolt meshing, the coaxial fixedly connected with drive gear of drive screw lower extreme, drive gear one side meshing have the driven gear of rotation connection on the ear card, the coaxial fixedly connected with of driven gear rotate the adjusting screw who connects on the ear card, adjusting screw pass in two corresponding cardboard one and rather than screw-thread fit.

Preferably, the clamping plates are all provided with air holes.

Preferably, the clamping shaft is sleeved with a sponge sleeve.

Preferably, there are five said filter screens, and five said filter screens are staggered along the direction from outer sidewall to inner sidewall of the outer casing.

Aiming at the problems that the air permeability and the protection effect of the existing mask cannot be considered at the same time, and the ear belt of the mask can cause too large ear burden on a user, the mask adopts the hard shell to accommodate the multiple layers of filter elements, and the hollow cavity, the nasal cavity, the circulating cavity and the miniature air pump are arranged in the shell, so that the protection effect is ensured, and the smooth breathing of the user is ensured; the transfer cavity is used for buffer transfer, circulating air is formed by matching with the circulating cavity, and the air passages with different widths at different levels in the shell are matched, so that the effect of assisting breathing is better realized; the support rod is adopted to replace an ear belt, a slidable and stepless-fixed ear clip is arranged in the support rod and used for accommodating ears, and a fixed shaft is adopted to ensure the stability of the ear clip; the air outlet cavity which is arranged in the shell and is communicated with the inside and the outside is used for ventilating, preventing stuffiness and preventing sweat, meanwhile, the air outlet cavity is communicated with the circulation cavity, and active circulating air flow is formed by depending on negative pressure of the circulation cavity, so that air inside and outside circulation is facilitated.

Drawings

Fig. 1 is a first perspective view of the present invention.

Fig. 2 is a perspective view of the second embodiment of the present invention.

Fig. 3 is a partially sectional perspective view of the first embodiment of the present invention.

Fig. 4 is a partially sectional perspective view of the second embodiment of the present invention.

Fig. 5 is a partially sectional three-dimensional schematic view of the present invention.

FIG. 6 is a schematic cross-sectional view of the present invention.

Fig. 7 is a partial perspective view of the support rod and its related structure according to the present invention.

Fig. 8 is a perspective view of the ear card and related structure thereof.

Detailed Description

The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 8. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

In the description of the present invention, it is to be understood that the terms "upper", "middle", "outer", "inner", and the like, indicate orientations or positional relationships, are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

The embodiment I is characterized by comprising a hard arc-shaped hollow shell 1, wherein ear belts are fixedly connected to two sides of the shell 1, the arc shape of the shell 1 is similar to the radian of the face of a human body, one side of the shell 1, which faces to the circle center, is an inner side, and one side of the shell, which is far away from the circle center, is an outer side, in the subsequent description, the outer side of the shell 1 is defined as the front side, the inner side of the shell 1 is defined as the rear side, the shell 1 covers the mouth of a user when in use and plays a role of a mask by matching with the subsequent structure, the inner side of the shell 1 faces to the mouth of the user when in use, the shell 1 simultaneously provides a fixed foundation for the subsequent structure, a plurality of air holes 35 are uniformly formed in the outer side of the shell 1, the air holes 35 are arranged so that outside air can enter the shell 1, a hollow cavity 3 is arranged in the center inside of the shell, get into in the cavity 3 through bleeder vent 35 in the air part direct access shell 1, cavity 3 in even a plurality of filter screens 4 of fixedly connected with, filter screen 4 is arranged in harmful substance and the bacterium of filtered air, refer to figure 6, filter screen 4 have five, five filter screens 4 along the crisscross setting of the direction of shell 1 lateral wall to inside wall, this setting can effectual improvement filter screen 4's utilization ratio, make the filtration pore between the adjacent filter screen 4 crisscross, improve filter screen 4's protection filtration capacity, cavity 3 one end intercommunication have fixed connection the transfer chamber 5 in shell 1, transfer chamber 5 is located cavity 3's rear and well cavity 3 intercommunication, the air that the filter screen 4 purifies in cavity 3 directly gets into transfer chamber 5, transfer chamber 5 both sides all communicate the circulation chamber 6 of fixed connection in cavity 3, two circulation cavities 6 are communicated with the outside through the air holes 35, miniature air pumps 7 are arranged in the two circulation cavities 6, the miniature air pumps 7 can pump out air in the circulation cavities 6 and discharge the air to the outside through the air holes 35, a negative pressure area is formed in the circulation cavities 6 in the process, so that the outside air enters the circulation cavities 6 through the hollow cavities 3 and the transit cavities 5 to form air purification circulation, the miniature air pumps 7 are electrically connected with lithium batteries with sides fixedly connected in the circulation cavities 6, the lithium batteries can be charged through USB interfaces arranged on the shell 1, a switch electrically connected with the miniature air pumps 7 is arranged on the shell 1, a user can conveniently control the switch of the miniature air pumps 7, the upper end of the transit cavity 5 is communicated with a nasal cavity 8 fixedly connected on the shell 1, the shell 1 of the nasal cavity 8 is made of an air-impermeable flexible material and can be made of medical rubber, the nasal cavity can also be made of other common air-tight flexible materials, the edge of the nasal cavity 8 is fixedly connected with an iron wire, so that the outer wall of the nasal cavity 8 is pressed close to the nose of a user conveniently, and the iron wire is wrapped with a piece of cloth liner to improve the comfort level;

the nasal cavity 8 and the transfer cavity 5 are communicated through a nasal hole 9 formed in the shell 1, the transfer cavity 5 and the two circulation cavities 6 are communicated through circulation holes 10, the transfer cavity 5 is communicated with the outside through an air suction hole 11 formed in the inner side of the shell 1, the two circulation cavities 6 are communicated with the outside through an air exhaling hole 36 formed in the inner side of the shell 1, and each of the circulation holes 10, the air suction hole 11 and the air exhaling hole 36 is internally provided with a check valve;

when the micro air pump is used specifically, a user wears the shell 1 near the mouth on the face, the micro air pump 7 is started through the switch, the hollow cavity 3 and the transfer cavity 5 are arranged in front of the mouth, it should be noted that the position of the inner wall side of the shell 1 opposite to the mouth is fixedly connected with the sponge inner core and the cushion ring wrapped by leather, when the user inhales air, the check valve of the air suction hole 11 is opened, the check valves in the circulation hole 10 and the exhalation hole 36 are closed, the user inhales air in the transfer cavity 5, meanwhile, negative pressure is formed in the transfer cavity 5 and inhales outside air into the shell 1, the outside air enters the transfer cavity 5 after being filtered by the multilayer filter screen 4 and is finally inhaled by the user, at the moment, the work of the micro air pump 7 has no influence on the inhalation of the user, when the user exhales, the check valves of the air suction hole 11 and the nasal cavity 9 are closed, the check valves in the circulation hole, the air that the user expired gets into the external world through circulation chamber 6, the work of miniature air pump 7 will influence the user and breathe in next time this moment, circulation hole 10 is opened and is leaded to forming negative pressure and transfer chamber 5 intercommunication in circulation chamber 6, also form the negative pressure zone in the transfer chamber 5 and inhale the external air under miniature air pump 7's effect, the external air filters through multilayer filter screen 4 and gets into transfer chamber 5 and get into circulation chamber 6 and form the circulation, when the user breathes in next time, the closing of circulation hole 10 can lead to through the air of purification stop in transfer chamber 5 and inhaled by the user, namely the user is the air of surviving in transfer chamber 5 at first, this part air can effectual compensation user because of the not enough condition of the inhaled air that multilayer filter screen 4 is too thick probably appears, thereby guarantee user's smooth and easy breathing.

Embodiment two, on the basis of embodiment one, the inside top fixedly connected with of transfer chamber 5 with the upper chamber 12 of nasal cavity 8 intercommunication, upper chamber 12 with well cavity 3, transfer chamber 5 all communicate, when the user breathes in, the check valve in nasal cavity 8 opens, the user can inhale the air after purifying in the upper chamber 12, the air after purifying through multilayer filter screen 4 partly gets into transfer chamber 5, another part then gets into upper chamber 12, upper chamber 12 space is less than transfer chamber 5, so when using this device, the user can get into more air through the mouth, and the air of breathing in through the nose can be less, upper chamber 12 both sides all communicate with two circulation chambeies 6 through circulation hole 10, all be provided with the check valve in two circulation holes 10, when the user exhales, the check valve in circulation hole 10 opens, the air of exhaling gets into upper chamber 12, and enters the circulation cavity 6 under the action of strong circulation internal negative pressure.

In the third embodiment, on the basis of the second embodiment, the transfer chamber 5 and the upper chamber 12 are both provided with an inner guide plate 13 fixedly connected to the side of the circulation hole 10, and an inner air passage 22 is formed between the inner guide plate 13 and the adjacent inner side wall of the housing 1, referring to fig. 6, the arrangement of the inner guide plate 13 can prevent purified air from entering the circulation chamber 6 from the transfer chamber 5 to a certain extent, so that more air enters the circulation chamber 6 from the inner side of the housing 1, and the function of assisting the user in exhaling is achieved;

referring to fig. 6, a first-stage external guide plate 14 fixedly connected to the side of the exhalation port 36 is disposed in the circulation chamber 6, a first-stage external air duct 15 is formed between the first-stage external guide plate 14 and the inner side wall of the housing 1, the first-stage external air duct 15 has a width increasing along the direction of exhalation outflow, and the flow rate of air is reduced by the venturi effect, so that the micro air pump 7 can pump more air out through the micro air pump 7, a second-stage external air duct 16 is formed between the first-stage external guide plate 14 and the outer side wall of the housing 1, a second-stage external guide plate 17 fixedly connected to the circulation chamber is disposed on the first-stage external guide plate 14 toward the outer side of the housing 1, a third-stage external air duct 18 is formed between the second-stage external air duct 17 and the first-stage external guide plate 14, a cavity is formed between the third-stage external air duct 18 and the second-stage external air duct, enters the circulating air flow formed by the micro air pump 7 through the secondary outer air passage 16 and the tertiary outer air passage 18, supplements the situation of insufficient air caused by the reduction of air inflow caused by the arrangement of the inner guide plate 13 and the inner air passage 22, therefore, possible overload and burning of the micro air pump 7 are prevented, the minimum width of the second-stage outer air duct 16 and the minimum width of the third-stage outer air duct 18 are both smaller than the minimum width of the inner air duct 22, the arrangement of the second-stage outer air duct 16 and the third-stage outer air duct 18 is mainly used for supplementing air near the micro air pump 7, the micro air pump 7 mainly aims at creating negative pressure near the circulation hole 10 and sucking outside air into the transfer cavity 5 through the hollow cavity 3 and the filter screen 4, so that the second-stage outer air duct 16 and the third-stage outer air duct 18 limit the amount of air entering the vicinity of the micro air pump 7, and normal air circulation and sufficient air in the transfer cavity 5 are ensured;

at this time, it should be noted that the circulation hole 10 communicating the transfer chamber 5 and the circulation chamber 6 is located between the first-stage external guide plate 14 and the outer side wall of the housing 1, and the circulation hole 10 communicating the upper chamber 12 and the circulation chamber 6 is located between the first-stage external guide plate 14 and the inner side wall of the housing 1, specifically referring to fig. 4 and 5, the setting lies in the difference of functions of the transfer chamber 5 and the upper chamber 12, the transfer chamber 5 and the circulation chamber 6 are communicated and mainly used for inhaling the external air to assist the user to inhale, the upper chamber 12 and the circulation chamber 6 are communicated and used for exhausting the air exhaled by the user, the communication of the upper chamber 12 and the circulation chamber 6 facilitates the convergence of the exhaled air, and the influence on the negative pressure region formed by the micro air.

In a fourth embodiment, based on the third embodiment, the present embodiment provides a triggering structure, so that the micro air pump 7 is only opened when the user exhales, specifically, referring to fig. 6, the micro air pump 7 is located in a space formed by the first-stage external flow guide plate 14, the second-stage external flow guide plate 17 and the side wall of the circulation cavity 6, the setting can enable the micro air pump 7 to form a negative pressure region in the region, the micro air pump 7 pumps air out of the outside in the negative pressure region, and introduces the air in the transit cavity 5 under the action of the negative pressure and forms a negative pressure in the transit cavity 5, the negative pressure in the transit cavity 5 is supplemented into the transit cavity 5 by the external air passing through the filter screen 4, so that a certain amount of clean air is remained in the transit cavity 5 when the circulation hole 10 is closed, the user can inhale the air conveniently, the amount of inhaled air of the user after the user passes through the filter screen 4 is reduced, and a small amount of exhaled air, one side of the micro air pump 7 is provided with a trigger rod 19 which is connected in the circulating cavity 6 in a sliding way, one end of the trigger rod 19 can be fixedly connected with a switch of the micro air pump 7, the other end of the trigger rod 19 passes through the adjacent first-stage outer guide plate 14 and is arranged on one side of the circulation hole 10, the triggering rod 19 is connected with the corresponding primary outer guide plate 14 through a spring 20, when the user exhales, the exhalation hole 36 opens the air exhaled by the user, and pushes the trigger rod 19 to move towards the outside of the housing 1, so as to press the switch of the miniature air pump 7 and start the miniature air pump 7, and after the exhalation is finished, the trigger rod 19 returns to the original position under the action of the spring 20 so as to close the micro air pump 7, the spring 20 is a soft spring 20 with a small stiffness coefficient, and the end of the trigger rod 19 facing the exhalation port 36 is fixedly connected with a circular piece so as to increase the stressed area and facilitate the exhaled air to blow the trigger rod 19 more easily.

Fifth embodiment, on the basis of any one of the first to fourth embodiments, two of the circulation chambers 6 are respectively connected with an air outlet chamber 21 fixedly connected in the housing 1 at one side, the air outlet chamber 21 is respectively provided with an air vent 35 at the inner side wall and the outer side wall of the housing 1, a flow limiting plate 23 fixedly connected in the circulation chamber 6 is arranged at the connection position of the air outlet chamber 21 and the circulation chamber 6, referring to fig. 6, the air outlet chamber 21 is arranged to prevent the inner side wall of the housing 1 from being contacted with the skin of the user for a long time to cause sultry sweating, the air outlet chamber 21 is arranged outside the backing ring, so as to prevent the outside air from directly entering the user's mouth and being inhaled, the air outlet chamber 21 and the circulation chamber 6 are communicated with each other by utilizing the outside air flow formed by the circulation chamber 6 during the exhalation of the user and the negative pressure formed by the action of the micro air pump 7 in the circulation chamber 6 to drive the air circulation in the air outlet chamber 21, so that, the circulation of the air in the air cavity is facilitated, and the flow limiting plate 23 is arranged to prevent a large amount of air in the air outlet cavity 21 from entering the circulation cavity 6 to influence the negative pressure environment of the circulation cavity 6.

Sixth embodiment, on the basis of any one of the first to fourth embodiments, referring to fig. 7, two sides of the housing 1 are rotatably connected with support rods 24, two through-side ear clips 25 are slidably connected in the two support rods 24, the ear clips 25 are used for accommodating ears of a user, the upper ends of the two ear clips 25 are fixedly connected with threaded sleeves 26 penetrating through the corresponding support rods 24, sliding grooves are formed in the support rods 24, the ear clips 25 are slidably connected in the sliding grooves, the threaded sleeves 26 penetrate through the sliding grooves, a pressing bolt 27 is threadedly engaged in each of the two threaded sleeves 26, the pressing screw rod is sleeved with a rubber thick gasket 28, the pressing bolt 27 is screwed to extrude the rubber thick gasket 28, thereby compress tightly the ear card 25 and fix on bracing piece 24 to confirm the position of ear card 25, the ventilative foam-rubber cushion of fixedly connected with in the ear card 25, with the comfort level that improves the user, prevent to wear the ear discomfort that probably appears for a long time.

Seventh embodiment, on the basis of sixth embodiment, the equal sliding connection of ear card 25 both sides wall have cardboard 29, be provided with the card axle 30 of both ends difference fixed connection on two cardboard 29 between two cardboard 29, refer to fig. 7, fig. 8, sliding connection is in ear card 25 towards user's skin one end about cardboard 29, card axle 30 can fall in user's ear root, the effectual shape that utilizes human ear fixes ear card 25 at user's ear, prevents that this device from dropping, card axle 30 overcoat be equipped with the sponge cover for promoting user's comfort level, prevent the wearing and tearing to user's skin that long-time use leads to.

In an eighth embodiment, on the basis of the seventh embodiment, referring to fig. 6 and 8, the threaded sleeve 26 is an incomplete threaded sleeve 26, the ear clip 25 is rotatably connected with a driving screw 31 engaged with the pressing bolt 27, the pressing bolt 27 is tightened to drive the driving screw 31 to rotate, the lower end of the driving screw 31 is coaxially and fixedly connected with a driving gear 32, one side of the driving gear 32 is engaged with a driven gear 33 rotatably connected to the ear clip 25, the driven gear 33 is coaxially and fixedly connected with an adjusting screw 34 rotatably connected to the ear clip 25, the driving screw 31 can drive the adjusting screw 34 to synchronously rotate through the driving gear 32 and the driven gear 33, the adjusting screw 34 passes through and is in threaded fit with one of the two corresponding clamping plates 29, specifically, one end of one of the two clamping plates 29 is fixedly connected with the threaded sleeve 26 of the clamping plate 29, the adjusting screw 34 passes through and is in threaded fit with the corresponding threaded sleeve 26 of the clamping plate 29, so that the adjusting screw 34 rotates to drive the clamping plate 29 to slide up and down along the ear clamp 25;

this embodiment is when specifically using, it can drive screw 31 and rotate to screw up the pressure screw rod, drive screw 31 rotates accessible drive gear 32, driven gear 33 drives adjusting screw 34 and rotates in step, thereby drive cardboard 29 through adjusting screw 34 and slide down along ear card 25, the synchronous whereabouts of in-process card axle 30 that screws up at the pressure screw rod and fall in user's ear root department, the setting of rubber thick gasket 28 provides the space for the downward displacement of pressure screw rod when guaranteeing that ear card 25 compresses tightly, thereby the little difference of adaptable different user's ear root degree of depth.

In the ninth embodiment, on the basis of the eighth embodiment, the air holes 35 are formed in the clamping plates 29, so that the air permeability of the ear clip 25 can be effectively improved, and the ears can be prevented from sweating and sultriness caused by wearing the device for a long time.

When the device is used specifically, a user wears the shell 1 on the face near the mouth, the cushion ring covers the mouth, the nasal cavity 8 is pressed outside the nose of the user, the ear clip 25 slides to a proper position and places ears in the ear clip 25, then the pressing screw rod is screwed down, the driving screw rod 31 rotates and can drive the adjusting screw rod 34 to synchronously rotate through the driving gear 32 and the driven gear 33, so that the clamping plate 29 is driven to slide downwards along the ear clip 25 through the adjusting screw rod 34, the clamping shaft 30 synchronously falls down and falls on the ear root of the user in the process of screwing the pressing screw rod, and the wearing stability of the device is ensured;

then the switch starts the micro air pump 7, when the user inhales, the check valve of the air suction hole 11 is opened, the check valve in the circulation hole 10 and the air exhaling hole 36 is closed, the user inhales the air in the transfer cavity 5, meanwhile, negative pressure is formed in the transfer cavity 5 and inhales the outside air into the shell 1, the outside air enters the transfer cavity 5 after being filtered by the multi-layer filter screen 4 and is finally inhaled by the user, at the moment, the work of the micro air pump 7 has no influence on the inhalation of the user, when the user exhales, the check valve of the air suction hole 11 and the nasal information hole 9 is closed, the check valve in the circulation hole 10 and the air exhaling hole 36 is opened, the air exhaled by the user enters the outside through the circulation cavity 6, at the moment, the work of the micro air pump 7 influences the next inhalation of the user, the circulation hole 10 is opened to form negative pressure in the circulation cavity 6 and communicate with the transfer cavity 5, and a negative pressure area is also, the outside air is filtered by the multi-layer filter screen 4 to enter the transfer cavity 5 and enter the circulation cavity 6 to form circulation, when a user inhales next time, the closing of the circulation holes 10 can lead the purified air to stay in the transfer cavity 5 and be inhaled by the user, namely, the air which is firstly inhaled by the user is the air which is remained in the transfer cavity 5, and the air can effectively compensate the situation that the inhaled air is insufficient due to the fact that the multi-layer filter screen 4 is too thick, so that smooth breathing of the user is guaranteed.

According to the medical PVC filtering device, the rigid shell 1 made of medical PVC materials is adopted, the filtering net 4 without filtering capacity can be replaced according to different requirements, so that the medical PVC filtering device is suitable for different environments, the filtering net 4 of the medical PVC filtering device is arranged in the shell 1 and is not in contact with the external, the possibility of two-way pollution caused by the fact that a user touches the filtering net 4 with a hand is avoided, the paths of air inlet and air outlet of the medical PVC filtering device are different, the filtering net 4 can be used for a longer time in the medical PVC filtering device, only the filtering net 4 in the medical PVC filtering device needs to be replaced regularly, and the filtering net 4 and the air inlet and the air outlet of the medical PVC filtering device are of structures which can be.

Claims

1. The utility model provides a multi-functional medical protective facial mask, a serial communication port, including curved hollow shell (1) of stereoplasm, shell (1) be inboard and keep away from centre of a circle one side for the outside towards centre of a circle one side, shell (1) outside even a plurality of bleeder vents (35) have been seted up, shell (1) inside central authorities be provided with well cavity (3), well cavity (3) in a plurality of filter screens (4) of even fixedly connected with, well cavity (3) one end intercommunication have transfer chamber (5) of fixed connection in shell (1), transfer chamber (5) both sides all communicate and have circulation chamber (6) of fixed connection in well cavity (3), two circulation chamber (6) all pass through bleeder vent (35) and external intercommunication, all be provided with miniature air pump (7) in two circulation chamber (6), transfer chamber (5) upper end intercommunication have nose cavity (8) of fixed connection on shell (1) (ii) a

The nasal cavity (8) and the middle transfer cavity (5) are communicated through a nasal hole (9) formed in the shell (1), the transfer cavity (5) and the two circulation cavities (6) are communicated through circulation holes (10), the transfer cavity (5) is communicated with the outside through an air suction hole (11) formed in the inner side of the shell (1), the two circulation cavities (6) are communicated with the outside through an exhalation hole (36) formed in the inner side of the shell (1), and each of the circulation holes (10), the air suction hole (11) and the exhalation hole (36) is internally provided with a check valve.

2. The multifunctional medical protective mask according to claim 1, wherein an upper cavity (12) communicated with the nasal cavity (8) is fixedly connected to the upper part inside the transfer cavity (5), the upper cavity (12) is communicated with the hollow cavity (3) and the transfer cavity (5), two sides of the upper cavity (12) are communicated with the two circulation cavities (6) through circulation holes (10), and check valves are arranged in the two circulation holes (10).

3. The multifunctional medical protective mask according to claim 2, wherein the transfer chamber (5) and the upper chamber (12) are both provided with an inner guide plate (13) fixedly connected to the side of the circulation hole (10), and an inner air passage (22) is formed between the inner guide plate (13) and the adjacent inner side wall of the shell (1);

circulation chamber (6) in be provided with one-level outer guide plate (14) of fixed connection at exhaling hole (36) side, one-level outer guide plate (14) and shell (1) inboard wall form one-level outer gas duct (15), one-level outer guide plate (14) and shell (1) lateral wall between form second grade outer gas duct (16), one-level outer guide plate (14) be provided with second grade outer guide plate (17) of fixed connection in the circulation storehouse towards shell (1) outside, second grade outer guide plate (17) and one-level outer guide plate (14) between form tertiary outer gas duct (18), the minimum width of second grade outer gas duct (16), tertiary outer gas duct (18) all be less than the minimum width of interior gas duct (22).

4. The multifunctional medical protective mask according to claim 3, wherein the micro air pump (7) is located in a space formed by the first-stage outer guide plate (14), the second-stage outer guide plate (17) and the side wall of the circulation cavity (6), a trigger rod (19) connected in the circulation cavity (6) in a sliding manner is arranged on one side of the micro air pump (7), one end of the trigger rod (19) can be in contact with a switch of the micro air pump (7), the other end of the trigger rod (19) penetrates through the adjacent first-stage outer guide plate (14) and is arranged on one side of the circulation hole (10), and the trigger rod (19) is connected with the corresponding first-stage outer guide plate (14) through a spring (20).

5. The multifunctional medical protective mask according to any one of claims 1 to 4, wherein one side of each of the two circulation chambers (6) is communicated with an air outlet chamber (21) fixedly connected in the shell (1), air vents (35) are respectively formed in the inner side wall and the outer side wall of the shell (1) of the air outlet chamber (21), and a flow restriction plate (23) fixedly connected in the circulation chamber (6) is arranged at the communication position of the air outlet chamber (21) and the circulation chamber (6).

6. The multifunctional medical protective mask according to any one of claims 1 to 4, wherein support rods (24) are rotatably connected to both sides of the shell (1), two through-side ear clips (25) are slidably connected to both of the support rods (24), the upper ends of the two ear clips (25) are fixedly connected with threaded sleeves (26) penetrating through the corresponding support rods (24), pressing bolts (27) are engaged with the threads in the two threaded sleeves (26), and rubber thick gaskets (28) are sleeved outside the pressing bolts.

7. The multifunctional medical protective mask according to claim 6, wherein two side walls of the ear clip (25) are slidably connected with clip plates (29), and a clip shaft (30) is arranged between the two clip plates (29) and has two ends fixedly connected with the two clip plates (29).

8. The multifunctional medical protective mask according to claim 7, wherein the thread sleeve (26) is an incomplete thread sleeve (26), the ear clip (25) is rotatably connected with a driving screw (31) engaged with the pressing bolt (27), the lower end of the driving screw (31) is coaxially and fixedly connected with a driving gear (32), one side of the driving gear (32) is engaged with a driven gear (33) rotatably connected to the ear clip (25), the driven gear (33) is coaxially and fixedly connected with an adjusting screw (34) rotatably connected to the ear clip (25), and the adjusting screw (34) passes through one of the two corresponding clip plates (29) and is in thread fit with the one.

9. The multifunctional medical protective mask as claimed in claim 7, wherein the clamping plates (29) are provided with air holes (35).

10. The multifunctional medical protective mask as claimed in claim 7, wherein a sponge sleeve is sleeved outside the clamping shaft (30).