CN210384625U

CN210384625U - Respiratory filter and protective mask

Info

Publication number: CN210384625U
Application number: CN202020367559.9U
Authority: CN
Inventors: 李高平; 张立群; 张宏忠; 朱鹏飞; 卢咏来; 胡静; 蔡庆; 周志峰; 韩成勇; 王婷
Original assignee: Beijing Topnew Group Co ltd; Shenzhen Lezheng Technology Co ltd; Beijing University of Chemical Technology; Beijing Research and Design Institute of Rubber Industry
Current assignee: Beijing Topnew Group Co ltd; Shenzhen Lezheng Technology Co ltd; Beijing University of Chemical Technology; Beijing Research and Design Institute of Rubber Industry
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-04-24
Anticipated expiration: 2030-03-23

Abstract

A respiratory filter and protective mask, the respiratory filter comprising: the filter box is provided with an outer layer filter cover and an inner layer filter cover which can be buckled together, an accommodating cavity is formed between the outer layer filter cover and the inner layer filter cover, the bottom of the inner layer filter cover is provided with a first accommodating cavity, a second accommodating cavity and a third accommodating cavity, and the inner side surface of the inner layer filter cover is provided with at least one convex edge; a replaceable cartridge assembly having a first replaceable cartridge positionable in the first receiving chamber, a second replaceable cartridge positionable in the second receiving chamber, and a third replaceable cartridge positionable in the third receiving chamber; the protective mask comprises a breathing filter, a breathing valve and a disinfection box provided with a sterilization sheet. The utility model discloses a respiratory filter and protective facial mask can select suitable filter core according to different protection scenes and demands, selects the breather valve to open or close, selects whether to use the piece of disinfecting to effectively prevent invasion such as bacterium, virus, harmful gas, tiny particle, pollen and dust, play the guard action.

Description

Respiratory filter and protective mask

Technical Field

The utility model relates to a health supplies field especially relates to a respiratory filter and protective facial mask.

Background

Along with the aggravation of environmental pollution and the attention to antiviral protection, in order to avoid virus, bacterium, haze and dust etc. to cause the injury to the human body, people protect through wearing the gauze mask.

At present, masks on the market are mainly of two types: disposable gauze mask and removable filter core's gauze mask. The disposable mask has simple structure and convenient use, but has short service life and large dosage, and the waste mask causes resource waste and environmental pollution. And the protective facial mask of removable filter core in the existing market has solved the short-lived problem of disposable gauze mask, and has reduced the pollution of abandonment gauze mask to the environment, nevertheless still has following several problems:

(1) when the protective mask with the replaceable filter element is used, the filter element is only one type, and different filter elements are required to be replaced in advance in different protective scenes.

(2) Take removable filter core protective facial mask of breather valve, its breather valve does not close the function, only filters the inspiratory gas of wearer during the use, and does not handle the gas of wearer's exhalation, when protecting high-risk harmful substance such as virus, bacterium, probably causes harm to other people.

(3) The replaceable filter element protective mask without the breather valve, particularly the silica gel protective mask, can generate water vapor and even water drops when in use, so that the mask body is moist and easy to breed bacteria, and the comfort of a wearer is reduced when general harmful substances such as pollen, dust and the like are protected.

(4) The valve plate of the existing breather valve has poor tear resistance, is easy to fatigue and damage in long-term use and shortens the service life.

(5) The filter cartridge of the existing replaceable filter element silica gel protective mask has smaller air flow inlet and outlet area and larger air suction and expiration resistance, so that a wearer can breathe smoothly.

(6) The professional protective mask is large in size and heavy in weight, and is easy to cause facial trauma of a wearer after being used for a long time.

Therefore, in order to facilitate the use of the mask by the wearer and to improve the protection function of the mask, the existing protective mask needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a respiratory filter can be used for the protection scene of difference, changes corresponding filter core according to the protection scene at any time, and its simple structure, convenient operation, protection filter effect are good.

Another object of the utility model is to provide a protective facial mask, its breather valve can be opened or closed, can be used for different protection scenes, changes corresponding filter core according to protection scene at any time, and simple structure, convenient operation, protecting effect are good, and cover body repeatedly usable, and it is good to wear the travelling comfort, has reduced the pollution of gauze mask discarded object to the environment.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a respiratory filter, include:

the filter box is provided with an outer layer filter cover and an inner layer filter cover which can be buckled together, an accommodating cavity is formed between the outer layer filter cover and the inner layer filter cover, a first accommodating cavity, a second accommodating cavity and a third accommodating cavity are arranged at the bottom of the inner layer filter cover, and at least one convex edge is arranged on the inner side surface of the inner layer filter cover;

a replaceable cartridge assembly having a first replaceable cartridge positionable in the first receiving chamber, a second replaceable cartridge positionable in the second receiving chamber, and a third replaceable cartridge positionable in the third receiving chamber.

According to the utility model discloses an embodiment, be equipped with a plurality of latticed holes of ventilating, it is a plurality of on the outer filter cover the latticed hole of ventilating with it is linked together to hold the chamber.

According to the utility model discloses an embodiment, be equipped with on the inlayer straining lid and connect the convex part, connect the convex part have can with hold the passageway that the chamber is linked together.

According to an embodiment of the present invention, the first replaceable filter element is SMS melt-blown nonwoven fabric, photocatalyst nonwoven fabric or PTFE microporous membrane nonwoven fabric; the second replaceable filter element is an activated carbon non-woven fabric; the third replaceable filter element is an activated carbon fiber felt pad or non-woven fabric.

According to an embodiment of the present invention, the filter cassette is a filter cassette made of resin or thermoplastic elastomer material.

According to the utility model discloses an embodiment, the outer peripheral edge symmetry of outer filter cover is equipped with two at least go-between, the internal energy joint ear area of go-between.

According to the utility model discloses an embodiment, first hold the chamber the second hold the chamber with the third holds and wears to be equipped with first branch, second branch and third branch in the chamber respectively, first replaceable filter core can be convoluteed on first branch, the second can be replaced the filter core and convoluteed on the second branch, the third can be replaced the filter core and convoluteed on the third branch.

According to the utility model discloses an embodiment, first branch stretches out first both ends that hold the chamber second branch stretches out the second holds the both ends in chamber and third branch stretches out the third holds the both ends in chamber, covers respectively and is equipped with two first end caps, two second end caps and two third end caps.

The utility model also provides a protective facial mask, include:

the mask body is provided with a first opening, a second opening and a third opening which can be communicated with an inner cavity of the mask body, and the second opening and the third opening are respectively positioned at two sides of the first opening;

in the respiratory filter, the inner filter cover of the respiratory filter can be connected with the first opening of the cover body in a sealing way;

the breather valve is hermetically arranged at the second opening of the cover body;

and the disinfection box is hermetically arranged at the third opening of the cover body, and the disinfection sheet is placed in the disinfection box.

According to the utility model discloses an embodiment, the breather valve includes first base, valve block, first lid and first rotatory lid, first base can sealing connection be in the second opening part of the cover body, the valve block is located first lid with in the first cavity that forms between the first base, first rotatory lid is rotationally connected on the first lid, first lid with all be equipped with a plurality of first vents on the first rotatory lid rotatory to with under the state that first vent on the first lid is relative, outside fluid can pass through first rotatory lid first lid flows in the first cavity.

According to the utility model discloses an embodiment, disinfection box includes second base, second lid and the rotatory lid of second, the second base can sealing connection be in the third opening department of the cover body, the second base with be formed with between the second lid and hold the second cavity of piece of disinfecting, the rotatory lid of second rotationally connects on the second lid, the second lid is equipped with a plurality of second ventilation openings, be equipped with the opening of ventilating on the rotatory lid of second the opening of ventilating on the second is rotatory to with under the relative state in a plurality of second ventilation openings on the second lid, outside fluid can pass through the rotatory lid of second the second lid flows into in the second cavity.

According to an embodiment of the present invention, the cover body is made of silicon rubber, and the hardness of the silicon rubber is 30A to 80A.

According to the utility model discloses an embodiment, the thickness of valve block is 0.2mm ~ 0.5 mm.

According to an embodiment of the present invention, the area of the first opening is larger than the area of the second opening, and the area of the first opening is larger than the area of the third opening.

The utility model discloses a respiratory filter and protective facial mask's characteristics and advantage are:

the utility model discloses a breathing filter can place the replaceable filter core of three kinds of different grade types simultaneously, according to the protection scene of difference, selects to be fit for protecting the hierarchical replaceable filter core at any time, protects pollen and dust, haze, bacterium and virus etc. respectively, and when harmful substance reached a certain degree, change outer filtration lid and inlayer filter the replaceable filter core that holds in the chamber between the lid can.

Two, the utility model discloses a protective facial mask is provided with the breather valve of switch, through the relative position of adjusting first rotatory lid and first lid, opens or closes the breather valve, and then the circulation of control air current, whether the person of being convenient for uses the breather valve in the protection scene selection of difference.

Thirdly, the utility model discloses a protective facial mask, the valve block of breather valve adopt rubber composition to add and tear resistance etc. and the rubber content is higher, has higher elasticity and tear resistance, has prolonged its life.

Fourth, the utility model discloses a protective facial mask has increased the air current business turn over area that the filter cartridge skin strains the lid and the inlayer strains the lid, reduces the resistance of breathing in and exhaling for the person of wearing breathes more smoothly.

Fifth, the utility model discloses a protective facial mask is provided with the disinfection box, has placed the piece of disinfecting in the disinfection box, and this piece of disinfecting effectively kills harmful substance such as virus, bacterium, pollen around the protective facial mask rapidly through the disinfection medicament that slowly-releasing is harmless to the human body.

Sixth, the protective mask of the utility model, the cover body is made of silicon rubber material, can be cleaned and disinfected, and is convenient for repeated use.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a perspective view of the respiratory filter of the present invention.

Fig. 2 is an exploded perspective view of the respiratory filter of the present invention.

Fig. 3 is a schematic perspective view of the inner filter cover of the respiratory filter of the present invention.

Fig. 4 is a first perspective view of the protective mask of the present invention.

Fig. 5 is a second perspective view of the protective mask of the present invention.

Fig. 6 is a rear view of the protective mask of the present invention.

Fig. 7 is an exploded perspective view of the breather valve of the protective mask of the present invention in the first state.

Fig. 8 is an exploded perspective view of a breather valve of a protective mask according to the present invention in a second state.

Fig. 9 is an exploded perspective view of the disinfection box of the protective mask of the present invention in the first state.

Fig. 10 is an exploded perspective view of the disinfection box of the protective mask of the present invention in the second state.

Fig. 11 is a schematic structural view of the ear band of the present invention.

Reference numerals and description:

1. a filter cartridge; 11. an outer filter cover; 111. a vent grid hole; 112. a filter cover body; 12. an inner layer filter cover; 121. a rib; 122. a filter cover body; 123. a groove; 13. an accommodating chamber; 14. a first accommodating chamber; 141. a first support bar; 142. a first end cap; 15. a second accommodating chamber; 151. a second support bar; 152. a second end cap; 16. a third accommodating chamber; 161. a third support bar; 162. a third end cap; 17. a connecting projection; 171. a channel; 18. a connecting ring; 2. a replaceable filter element assembly; 21. a first replaceable filter element; 22. a second replaceable filter element; 23. a third replaceable filter element; 3. a cover body; 31. a first opening; 32. a second opening; 33. a third opening; 34. an inner cavity; 4. a breather valve; 41. a first base; 411. a channel; 42. a valve plate; 43. a first cover body; 431. a first vent; 44. a first rotary cover; 441. a first vent; 441', a vent; 45. a first cavity; 5. a sterilizing box; 51. sterilizing sheets; 52. a second base; 53. a second cover body; 531. a second vent; 54. a second rotary cover; 541. a vent opening; 55. a second cavity; 6. an ear band; 61. adjusting the connecting end; 611. a convex portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Implementation mode one

As shown in fig. 1 and 2, the present invention provides a respiratory filter comprising a filter cartridge 1 and a replaceable filter element assembly 2, wherein: the filter box 1 is provided with an outer filter cover 11 and an inner filter cover 12 which can be buckled together, an accommodating cavity 13 is formed between the outer filter cover 11 and the inner filter cover 12, the bottom of the inner filter cover 12 is provided with a first accommodating cavity 14, a second accommodating cavity 15 and a third accommodating cavity 16, and the inner side surface of the inner filter cover 12 is provided with at least one convex edge 121; the replaceable cartridge assembly 2 has a first replaceable cartridge 21 positionable in the first housing chamber 14, a second replaceable cartridge 22 positionable in the second housing chamber 15, and a third replaceable cartridge 23 positionable in the third housing chamber 16.

The utility model discloses a breathing filter, its filter cartridge 1 adopts resin or thermoplastic elastomer material to make, and the cover 11 is strained with the inlayer to the skin of this filter cartridge 1 and is strained the butt joint that cover 12 can open and shut together, has realized that the first filter core 21 of replaceable, the second of replaceable filter core group spare 2 can replace the change of filter core 22 and the third can replace filter core 23, makes this breathing filter repeatedly usable, its simple structure and convenient operation.

In addition, in the present invention, the first replaceable filter element 21 is SMS melt-blown nonwoven fabric, photocatalyst nonwoven fabric or PTFE microporous membrane nonwoven fabric; the second replaceable filter element 22 is an activated carbon non-woven fabric; the third replaceable filter element 23 is an activated carbon fiber felt pad or non-woven fabric. When the protection requirements on bacteria, viruses, harmful gases and the like are high, the first replaceable filter element 21 in the first accommodating cavity 14 is taken out and put into the accommodating cavity 13 between the outer filter cover 11 and the inner filter cover 12 for protection; when fine particles such as PM2.5 and the like need to be protected in haze weather, the second replaceable filter element 22 in the second accommodating cavity 15 is taken out and placed into the accommodating cavity 13 between the outer filter cover 11 and the inner filter cover 12 for protection; when protecting against pollen or larger dust particles, the third replaceable filter element 23 in the third receiving chamber 16 is removed and placed in the receiving chamber 13 between the outer filter cover 11 and the inner filter cover 12 for protection.

Therefore, the breathing filter of the utility model can be used for placing three different types of replaceable filter elements, and the replaceable filter elements with proper protection levels can be selected at any time according to different protection scenes to respectively protect pollen, dust, haze, bacteria, viruses and the like; and when the harmful substances reach a certain degree, the replaceable filter element in the accommodating cavity 13 between the outer layer filter cover 11 and the inner layer filter cover 12 can be replaced.

Specifically, referring to fig. 2, the outer filter cover 11 is substantially rectangular with an upper circular arc transition, the outer filter cover 11 has a filter cover body 112 and a protruding edge (not shown) connected to the outer periphery of the filter cover body 112, a plurality of air-permeable mesh holes 111 are formed in the filter cover body 112, and the air-permeable mesh holes 111 are communicated with the accommodating cavity 13. In this embodiment, under the condition that does not influence the use, the largest possible flow area of the great air current of design during the design of ventilation grid hole 111, the gaseous quick circulation of being convenient for, the utility model discloses do not restrict the diameter size of ventilation grid hole 111, as long as can realize the gas circulation can.

As shown in fig. 3, the inner layer filter cover 12 of the present invention is shown, and the inner layer filter cover 12 is provided with a connecting protrusion 17, and the connecting protrusion 17 has a passage 171 capable of communicating with the accommodating chamber 13. In this embodiment, the inner filter cover 12 has a filter cover body 122 and a groove 123 connected to the outer periphery of the filter cover body 122, when the inner filter cover 12 and the outer filter cover 11 are buckled together, the protruding edge of the outer filter cover 11 can be inserted into the groove 123 of the inner filter cover 12, so as to realize the connection and buckling of the inner filter cover 12 and the outer filter cover 11, and the structure of the protruding edge and the groove 123 is adopted, so that the opening and closing of the outer filter cover 11 and the inner filter cover 12 can be more convenient and quicker; of course, in other embodiments, the outer periphery of the outer filter cover 11 may be provided with a groove, and the outer periphery of the corresponding inner filter cover 12 is provided with a protruding rib, or in other embodiments, the snap-fit connection between the outer filter cover 11 and the inner filter cover 12 may also be a magnet-absorption connection, or other connection methods such as bonding, pinning, etc., which is not limited herein.

The connecting protrusion 17 is substantially in the shape of a flat cylinder having a channel 171, and the connecting protrusion 17 is formed on the outer side surface of the inner filter cover 12, that is, on the side surface of the filter cover body 122 away from the outer filter cover 11.

Further, the inner side surface of the inner filter cover 12 is provided with at least one rib 121, the ribs 121 are arranged in parallel on the inner side surface of the inner filter cover 12 opposite to the outer filter cover 11, and the ribs 121 cross the channel 171 connected with the protrusion 17, the ribs 121 not only can divide the inner filter cover 12 into a plurality of cavities, increase the flow area of the air flow, but also can play a role in compressing the first replaceable filter element 21, the second replaceable filter element 22 or the third replaceable filter element 23 placed in the accommodating cavity 13.

In one embodiment of the present invention, the outer periphery of the outer filtering cover 11 is symmetrically provided with at least two connecting rings 18, and the ear belt 6 can be clamped in the connecting rings 18. As shown in fig. 11, the ear belt 6 is substantially in the form of a long strip and may have a certain width, two adjusting connection ends 61 are provided at both ends of the ear belt 6, a plurality of protrusions 611 are provided at intervals on each adjusting connection end 61, and the connection between the filter cassette 1 and the ear belt 6 can be realized by inserting the protrusions 611 into the connection ring 18. The ear belt 6 is made of a non-toxic high-elasticity silica gel material, an antibacterial agent is added in the silica gel material, preferably nano silver ions, and has an antibacterial self-cleaning effect, and the structural design of the adjustable buckle is realized through a plurality of convex parts 611 arranged at the end part of the ear belt 6.

In this embodiment, a connecting ring 18 is respectively arranged on two opposite outer edges of the outer filter cover 11, one ear belt 6 is provided, and two adjusting connecting ends 61 of the ear belt 6 are respectively connected with the corresponding connecting ring 18; of course, in other embodiments, two or more connecting rings 18 can be provided on the two outer edges of the outer filter cover 11, which are opposite to each other, and correspondingly, the ear band 6 can be two or more, which is not limited herein. The utility model discloses a go-between 18's that sets up on the outer lid 11 of straining number, this ear area 6 optional two points or four-point are fixed to adopt the design of adjustable knot, let wear more comfortable, more steady and more convenient.

In an embodiment of the present invention, as shown in fig. 1 to 3, a first supporting rod 141, a second supporting rod 151 and a third supporting rod 161 are respectively inserted into the first accommodating chamber 14, the second accommodating chamber 15 and the third accommodating chamber 16, the first replaceable filter element 21 can be wound on the first supporting rod 141, the second replaceable filter element 22 can be wound on the second supporting rod 151, and the third replaceable filter element 23 can be wound on the third supporting rod 161.

The first replaceable filter element 21, the second replaceable filter element 22 and the third replaceable filter element 23 are wound on the first support rod 141, the second support rod 151 and the third support rod 161, so that the replaceable filter elements can be conveniently accommodated in the accommodating cavities and can be conveniently taken out, and in addition, the flatness of the replaceable filter elements can be ensured to the maximum extent.

Further, the two ends of the first supporting rod 141 extending out of the first accommodating cavity 14, the two ends of the second supporting rod 151 extending out of the second accommodating cavity 15, and the two ends of the third supporting rod 161 extending out of the third accommodating cavity 16 are respectively covered with two first end caps 142, two second end caps 152, and two third end caps 162.

Of course, in the present invention, in order to facilitate distinguishing the types of the replaceable filter elements and facilitate different levels of protection, the first end cap 142, the second end cap 152 and the third end cap 162 may be configured to have different colors or different shapes, which is not limited herein. When each replaceable filter element is replaced in different protection scenes, the unfolded replaceable filter element is wound on each support rod and is placed into the corresponding accommodating cavity, and then the required replaceable filter element is unfolded and is pressed tightly through the convex ribs 121 on the inner side surface of the inner filter cover 12. When the harmful substances reach a certain degree, the required new replaceable filter element is replaced.

Second embodiment

As shown in fig. 4 to 10, the present invention further provides a protective mask, which comprises a mask body 3, a breathing filter, a breathing valve 4 and a disinfection box 5, wherein: the cover 3 is provided with a first opening 31, a second opening 32 and a third opening 33 which can be communicated with an inner cavity 34 of the cover 3, and the second opening 32 and the third opening 33 are respectively positioned at two sides of the first opening 31; the breathing filter is the breathing filter described in the first embodiment, and specific structures, working principles and beneficial effects of the breathing filter are not described herein again. The inner filter cover 12 of the breathing filter can be connected with the first opening 31 of the cover body 3 in a sealing way; the breather valve 4 is hermetically arranged at the second opening 32 of the cover body 3; the sterilizing box 5 is hermetically installed at the third opening 33 of the cover 3, and a sterilizing sheet 51 is placed in the sterilizing box 5.

The protective mask of the utility model is provided with the breather valve 4 which can be opened and closed, and the circulation of air flow is controlled by opening or closing the breather valve 4, so that the wearer can select whether to use the breather valve 4 in different protective scenes; in addition, the protective mask is also provided with a disinfection box 5, a sterilization sheet 51 is placed in the disinfection box 5, and the sterilization sheet 51 can rapidly and effectively kill harmful substances such as virus, bacteria, pollen and the like around the protective mask by slowly releasing disinfection and sterilization medicaments harmless to human bodies; furthermore, the filter box 1 of the breathing filter of the protective mask is made of resin or thermoplastic elastomer materials, the outer filter cover 11 of the filter box 1 and the inner filter cover 12 can be opened and closed and buckled together, so that the replacement of the first replaceable filter element 21, the second replaceable filter element 22 and the third replaceable filter element 23 of the replaceable filter element assembly 2 is realized, the protective opening can be reused, and the protective mask is simple in structure and convenient to operate.

Specifically, as shown in fig. 6, the shape of the first opening 31 on the cover body 3 matches with the shape of the connecting protrusion 17 on the inner filter cover 12 of the respiratory filter, and the first opening 31 is communicated with the inner cavity 34 of the cover body 3; the second opening 32 on the mask body 3 is positioned at one side of the first opening 31, the second opening 32 is communicated with the inner cavity 34 of the mask body 3, the area of the second opening 32 is smaller than that of the first opening 31, and the second opening 32 is used for being connected with the breather valve 4; a third opening 33 of the cover 3 is located on the other side of the first opening 31, the area of the third opening 33 is smaller than that of the first opening 31, and the third opening 33 is used for connecting with the sterilizing box 5. In the present embodiment, the area of the first opening 31 is designed to be larger than the area of the second opening 32 and the area of the third opening 33, that is, the first opening 31 is the opening with the largest area, so that when the external air is inhaled and the wearer's air is exhaled, the air flows faster, and the wearer's breathing is smoother.

The cover body 3 in the embodiment is made of a silicon rubber material, and the hardness of the silicon rubber is 30A-80A, so that the cover body 3 has certain flexibility, the structure of the cover body 3 is light, the weight is light, and the service life of a wearer can be prolonged; in addition, because the silicon rubber has the characteristics of stable chemical property and the like, the cover body 3 can be sterilized and disinfected for multiple times, is easy to clean, has strong chemical stability, can be repeatedly used, prolongs the service life of the multipurpose silicon rubber protective mask capable of keeping dry, and reduces the pollution of the discarded mask to the environment.

In an embodiment of the present invention, as shown in fig. 7 and 8, the breather valve 4 includes a first base 41, a valve plate 42, a first cover 43 and a first rotary cover 44, the first base 41 can be connected to the second opening 32 of the cover body 3 in a sealing manner, the valve plate 42 is located in a first cavity 45 formed between the first cover 43 and the first base 41, the first rotary cover 44 can be rotatably connected to the first cover 43, a plurality of first vents 431 and a plurality of first vents 441 are disposed on the first cover 43 and the first rotary cover 44, and when the first vents 441 on the first rotary cover 44 are rotated to be opposite to the first vents 431 on the first cover 43, the external fluid can flow into the first cavity 45 through the first rotary cover 44 and the first cover 43.

Specifically, the first base 41 has a passage 411, so that after the first base 41 is connected with the second opening 32 of the cover 3, the first cavity 45 can be communicated with the inner cavity 34 of the cover 3 through the passage 411; the valve plate 42 can be prepared by adopting a rubber composition, comprises rubber, a filler and a tear-resistant agent, has a rubber content of more than 50 percent, a high rubber content, high elasticity and tear resistance, and a prolonged service life. In this embodiment, the thickness of the valve plate 42 is 0.2mm to 0.5 mm. The valve plate 42 functions as: when exhaling, the positive pressure of the exhaust gas blows the valve plate 42 open to exhaust the waste gas in the cover body 3 rapidly, and the negative pressure when inhaling will automatically seal the valve plate 42 in the channel 411 of the first base 41, at this moment, the breather valve 4 is closed to avoid the intake of the pollutants in the external environment.

In this embodiment, the total area of the first ventilation holes 441 on the first rotating cover 44 is one half of the outer surface area of the first rotating cover 44, and the total area of the first ventilation holes 431 on the first cover 43 is one half of the outer surface area of the first cover 43, the first rotating cover 44 can be screwed on the first cover 43, and can also be sleeved on the first cover 43, when the first ventilation holes 441 on the first rotating cover 44 are rotated to be opposite to the first ventilation holes 431 on the first cover 43, the external fluid can flow into the first cavity 45 through the first rotating cover 44 and the first cover 43, and flow into the inner cavity 34 of the cover 3 through the channel 411 on the first base 41 and the second opening 32. In another embodiment, as shown in fig. 8, the first ventilation opening 441 of the first rotary cover 44 may be configured as a semicircular ventilation opening 441', and the structure of the ventilation opening of the first rotary cover 44 is not particularly limited as long as the first rotary cover 44 is provided with the ventilation opening.

By adjusting the relative positions of the first ventilation opening 441 of the first rotating cover 44 and the first ventilation opening 431 of the first cover 43, the breathing valve 4 can be opened or closed, so as to control the circulation of the airflow, and a wearer can conveniently select whether to use the breathing valve 4 in different protection scenes. When protecting bacteria and viruses, the breather valve 4 can be closed in order to prevent the exhaled gas from harming other people; when general pollen or dust protection is performed, the breather valve 4 may be opened to make breathing smoother and to keep the cover body 3 dry.

In an embodiment of the present invention, as shown in fig. 9 and 10, the sterilizing box 5 includes a second base 52, a second cover 53 and a second rotary cover 54, the second base 52 can be connected to the third opening 33 of the cover 3 in a sealing manner, a second cavity 55 capable of accommodating the sterilizing sheet 51 is formed between the second base 52 and the second cover 53, the second rotary cover 54 can be rotatably connected to the second cover 53, the second cover 53 is provided with a plurality of second vents 531, the second rotary cover 54 is provided with a plurality of vent openings 541, the vent openings 541 on the second rotary cover 54 are rotated to be opposite to the plurality of second vents 531 on the second cover 53, external fluid can flow into the second cavity 55 through the second rotary cover 54 and the second cover 53, thereby facilitating the slow release of the sterilizing sheet in the second cavity 55, and achieving the purpose of rapidly and effectively killing and protecting the surrounding viruses, Harmful substances such as bacteria and pollen.

In this embodiment, the bottom of the second base 52 is a sealing structure, and no air flow passes between the second base and the cover 3. The total area of the ventilation openings 541 on the second rotating cover 54 is one-half of the outer surface area of the second rotating cover 54, and the total area of the plurality of second ventilation openings 531 on the second cover 53 is one-half of the outer surface area of the second cover 53, the second rotating cover 54 can be screwed on the second cover 53, or can be sleeved on the second cover 53, when the ventilation openings 541 on the second rotating cover 54 rotate to be opposite to the plurality of second ventilation openings 531 on the second cover 53, external fluid can flow into the second cavity 55 through the second rotating cover 54 and the second cover 53 to contact with the sterilizing sheet 51 in the second cavity 55, and the sterilizing sheet 51 can rapidly and effectively kill harmful substances such as viruses, bacteria, pollen and the like around by continuously emitting chlorine dioxide with minimum concentration. When the protection requirement is high, the positions of the ventilation opening 541 of the second rotating cover 54 and the plurality of second ventilation openings 531 of the second cover body 53 are adjusted, so that the disinfection box 5 has airflow circulation with the outside, and further, the disinfection and sterilization medicament is slowly released around the wearer, and the protection effect is improved; when the protection requirement is low, the positions of the ventilation opening 541 of the second rotary cover 54 and the plurality of second ventilation openings 531 of the second cover 53 are adjusted to prevent the disinfection box 5 from circulating with the outside air flow, and prolong the service time of the sterilizing sheet 51.

The utility model discloses a protective mask can select suitable filter core according to protection scene and protection demand of difference to select opening or closing of breather valve 4, whether select to use piece 51 of disinfecting, thereby effectively prevent the invasion of harmful substance such as bacterium, virus, harmful gas, tiny particle, pollen and dust, play the guard action.

The above are only a few embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims

1. A respiratory filter, comprising:

2. The respiratory filter of claim 1 wherein the outer filter cover defines a plurality of vent cells, the plurality of vent cells being in communication with the receiving chamber.

3. The respiratory filter of claim 1 wherein the inner filter cover has a connection protrusion, the connection protrusion having a channel that is capable of communicating with the receiving cavity.

4. The respiratory filter of claim 1, wherein the first replaceable filter element is an SMS melt blown nonwoven fabric, a photocatalyst nonwoven fabric, or a PTFE microporous membrane nonwoven fabric; the second replaceable filter element is an activated carbon non-woven fabric; the third replaceable filter element is an activated carbon fiber felt pad or non-woven fabric.

5. The respiratory filter of claim 1, wherein the filter cartridge is a filter cartridge made of a resin or thermoplastic elastomer material.

6. The respiratory filter of claim 1, wherein the outer filter cover has at least two connecting rings symmetrically disposed around its outer periphery, and the connecting rings are capable of engaging with ear straps.

7. The respiratory filter of claim 1, wherein the first receiving chamber, the second receiving chamber, and the third receiving chamber have a first strut, a second strut, and a third strut, respectively, and wherein the first replaceable filter element is windable about the first strut, the second replaceable filter element is windable about the second strut, and the third replaceable filter element is windable about the third strut.

8. The respiratory filter of claim 7, wherein the first strut extends beyond the ends of the first receiving chamber, the second strut extends beyond the ends of the second receiving chamber, and the third strut extends beyond the ends of the third receiving chamber, and wherein two first end caps, two second end caps, and two third end caps are respectively disposed.

9. A protective mask, comprising:

the respiratory filter of any one of claims 1 to 8, wherein the inner filter cover of the respiratory filter is sealingly connectable to the first opening of the mask body;

10. The protective mask according to claim 9, wherein the breather valve comprises a first base, a valve plate, a first cover, and a first rotary cover, wherein the first base is capable of being sealingly connected to the second opening of the mask body, the valve plate is located in a first cavity formed between the first cover and the first base, the first rotary cover is rotatably connected to the first cover, a plurality of first vents are disposed on the first cover and the first rotary cover, and when the first vents on the first rotary cover rotate to a position opposite to the first vents on the first cover, external fluid can flow into the first cavity through the first rotary cover and the first cover.

11. The protective mask of claim 9 wherein said disinfecting case comprises a second base, a second cover and a second rotatable cover, said second base being sealingly connected to said third opening of said mask body, a second cavity for receiving said disinfecting sheet being formed between said second base and said second cover, said second rotatable cover being rotatably connected to said second cover, said second cover being provided with a plurality of second vents, said second rotatable cover being provided with vent openings, and external fluid being able to flow into said second cavity through said second rotatable cover and said second cover when said vent openings of said second rotatable cover are rotated to be opposite to said plurality of second vents of said second cover.

12. The protective mask according to claim 9, wherein said mask body is made of a silicone rubber material having a hardness of 30A to 80A.

13. The protective mask of claim 10 wherein the thickness of said valve flap is between 0.2mm and 0.5 mm.

14. The protective mask of claim 9 wherein the area of said first opening is greater than the area of said second opening and the area of said first opening is greater than the area of said third opening.