CN210384625U - Respiratory filter and protective mask - Google Patents

Abstract

A breathing filter and a protective mask, the breathing filter comprises: a filter box, an outer layer filter cover and an inner layer filter cover that can be snapped together, and a accommodating cavity is formed between the outer layer filter cover and the inner layer filter cover , the bottom of the inner filter cover is provided with a first accommodating cavity, a second accommodating cavity and a third accommodating cavity, and the inner side of the inner filter cover is provided with at least one rib; The first replaceable filter element in the cavity, the second replaceable filter element that can be placed in the second accommodating cavity, and the third replaceable filter element that can be placed in the third accommodating cavity; the protective mask includes a breathing filter, a breathing valve And a sterilization box with sterilization tablets. The breathing filter and protective mask of the utility model can be selected according to different protection scenarios and needs, by selecting an appropriate filter element, selecting whether to open or close the breathing valve, and selecting whether to use a sterilizing sheet, so as to effectively prevent bacteria, viruses, harmful gases, fine particles, Pollen and dust intrusion, play a protective role.

Description

Respiratory filters and protective masks

technical field

The utility model relates to the field of sanitary products, in particular to a breathing filter and a protective mask.

Background technique

With the aggravation of environmental pollution and the emphasis on anti-virus protection, in order to avoid viruses, bacteria, haze and dust from causing harm to the human body, people wear masks for protection.

At present, there are two main types of masks on the market: disposable masks and masks with replaceable filter elements. Disposable masks are simple in structure and easy to use, but have a short service life and a large amount of use. Discarded masks cause resource waste and environmental pollution. Although the protective masks with replaceable filter elements in the existing market solve the problem of short service life of disposable masks and reduce the pollution of discarded masks to the environment, the following problems still exist:

(1) The protective mask with replaceable filter element has only one type of filter element when in use. Different protection scenarios need to be prepared in advance to replace different filter elements.

(2) The replaceable filter element protective mask with a breathing valve has no closing function of the breathing valve. When used, only the gas inhaled by the wearer is filtered, and the gas exhaled by the wearer is not processed. It may cause harm to others when it is protected from other high-risk hazardous substances.

(3) Replaceable filter element protective masks without breathing valve, especially silicone protective masks, will generate water vapor or even water droplets during use, which will cause the cover to be wet and easily breed bacteria. When protecting against general harmful substances such as pollen and dust, Reduce wearer comfort.

(4) The tear resistance of the valve plate of the existing breathing valve is poor, and it is easy to be fatigued and damaged when used for a long time, and the service life is shortened.

(5) The air flow in and out of the filter box of the existing replaceable filter element silicone protective mask is small, and the inhalation and exhalation resistance is large, which makes the wearer's breathing not smooth enough.

(6) Professional protective masks are large in size and heavy in quality, and long-term use can easily cause facial trauma to the wearer.

Therefore, in order to facilitate the wearer's use and improve the protective function of the mask, it is necessary to improve the existing protective masks.

Utility model content

The purpose of the utility model is to provide a breathing filter, which can be used in different protection scenarios, and the corresponding filter element can be replaced at any time according to the protection scenarios, which is simple in structure, convenient in operation and good in protection and filtering effect.

Another object of the present invention is to provide a protective mask, the breathing valve of which can be opened or closed, can be used in different protection scenarios, and the corresponding filter element can be replaced at any time according to the protection scenarios, with simple structure, convenient operation and good protection effect, In addition, the cover body can be reused, the wearing comfort is good, and the pollution of the mask waste to the environment is reduced.

Above-mentioned purpose of the present utility model can adopt following technical scheme to realize:

The utility model provides a breathing filter, comprising:

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

A replaceable filter element assembly having a first replaceable filter element that can be placed in the first receiving cavity, a second replaceable filter element that can be placed in the second receiving cavity, and a third receiving cavity that can be placed The third replaceable filter element inside.

According to an embodiment of the present invention, the outer filter cover is provided with a plurality of ventilation grid holes, and the plurality of the ventilation grid holes communicate with the accommodating cavity.

According to an embodiment of the present invention, the inner filter cover is provided with a connecting convex portion, and the connecting convex portion has a channel that can communicate with the accommodating cavity.

According to an embodiment of the present invention, the first replaceable filter element is SMS meltblown non-woven fabric, photocatalyst non-woven fabric or PTFE microporous membrane non-woven fabric; the second replaceable filter element is 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 box is a filter box made of resin or thermoplastic elastomer material.

According to an embodiment of the present invention, at least two connecting rings are symmetrically arranged on the outer periphery of the outer filter cover, and the ear straps can be clipped inside the connecting rings.

According to an embodiment of the present invention, a first support rod, a second support rod and a third support rod are respectively passed through the first accommodating cavity, the second accommodating cavity and the third accommodating cavity, so that the The first replaceable filter element can be wound around the first support rod, the second replaceable filter element can be wound around the second support rod, and the third replaceable filter element can be wound around the second support rod. on the third pole.

According to an embodiment of the present invention, the two ends of the first support rod protruding from the first accommodating cavity, the two ends of the second support rod protruding from the second accommodating cavity, and the third The two ends of the support rod protruding from the third accommodating cavity are respectively covered with two first end caps, two second end caps and two third end caps.

The utility model also provides a protective mask, comprising:

a cover body, having a first opening, a second opening and a third opening that can communicate with the inner cavity of the cover body, the second opening and the third opening are respectively located on both sides of the first opening;

In the above-mentioned breathing filter, the inner filter cover of the breathing filter can be tightly connected with the first opening of the cover body;

a breathing valve, sealed and installed at the second opening of the cover body;

A sterilization box is sealed and installed at the third opening of the cover body, and a sterilization sheet is placed in the sterilization box.

According to an embodiment of the present invention, the breathing valve includes a first base, a valve plate, a first cover and a first rotating cover, and the first base can be sealingly connected to the second opening of the cover, The valve plate is located in the first cavity formed between the first cover body and the first base, the first rotating cover is rotatably connected to the first cover body, and the first Both the cover body and the first rotating cover are provided with a plurality of first ventilation openings, and the first ventilation openings on the first rotating cover are rotated to be opposite to the first ventilation openings on the first cover body. In the state, the external fluid can flow into the first cavity through the first rotating cover and the first cover body.

According to an embodiment of the present invention, the sterilization box includes a second base, a second cover and a second rotating cover, the second base can be sealed at the third opening of the cover, and the first A second cavity capable of accommodating the sterilization sheet is formed between the two bases and the second cover, the second rotating cover is rotatably connected to the second cover, and the second cover There are a plurality of second ventilation openings, the second rotating cover is provided with ventilation openings, and the ventilation openings on the second rotating cover are rotated to be opposite to the multiple second ventilation openings on the second cover body In the state of , the external fluid can flow into the second cavity through the second rotating cover and the second cover body.

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

According to an embodiment of the present invention, the thickness of the valve plate is 0.2 mm˜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 features and advantages of the breathing filter and the protective mask of the present utility model are:

1. In the breathing filter of the present invention, three different types of replaceable filter elements can be placed at the same time. According to different protection scenarios, a replaceable filter element suitable for the protection level can be selected at any time to prevent pollen and dust, haze, bacteria and viruses respectively. When the harmful substances reach a certain level, the replaceable filter element in the accommodating cavity between the outer filter cover and the inner filter cover can be replaced.

2. The protective mask of the present utility model is provided with a switchable breathing valve. By adjusting the relative position of the first rotating cover and the first cover body, the breathing valve is opened or closed, thereby controlling the flow of air flow, which is convenient for the wearer in different situations. Choose whether to use a breathing valve in the protection scenario.

3. In the protective mask of the present utility model, the valve plate of the breathing valve is made of rubber composition, and an anti-tear agent is added, which has a high rubber content, high elasticity and tear resistance, and prolongs its use. life.

4. The protective mask of the utility model increases the airflow in and out area of the outer filter cover and the inner filter cover of the filter box, reduces the resistance of inhalation and exhalation, and makes the wearer breathe more smoothly.

5. The protective mask of the present invention is provided with a sterilizing box, and a sterilizing tablet is placed in the sterilizing box. The sterilizing tablet can quickly and effectively kill viruses, bacteria and pollen around the protective mask by slowly releasing sterilizing and sterilizing agents that are harmless to the human body. and other harmful substances.

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

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic perspective view of the breathing filter of the present invention.

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

3 is a perspective view of the inner filter cover of the breathing filter of the present invention.

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

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

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

7 is a perspective exploded view of the first state of the breathing valve of the protective mask of the present invention.

8 is an exploded perspective view of the second state of the breathing valve of the protective mask of the present invention.

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

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

FIG. 11 is a schematic structural diagram of the earband of the present invention.

Reference signs and descriptions:

1. Filter box; 11. Outer filter cover; 111. Ventilation mesh hole; 112. Filter cover body; 12. Inner filter cover; 121. Raised edge; 122. Filter cover body; 123. Groove; 14, the first accommodating cavity; 141, the first strut; 142, the first end cap; 15, the second accommodating cavity; 151, the second strut; 152, the second end cap; 16, the third accommodating Cavity; 161, third strut; 162, third end cap; 17, connecting protrusion; 171, channel; 18, connecting ring; 2, replaceable filter element assembly; 21, first replaceable filter element; 22, second Replaceable filter element; 23, third replaceable filter element; 3, cover body; 31, first opening; 32, second opening; 33, third opening; 34, inner cavity; 4, breathing valve; 41, first base 411, channel; 42, valve plate; 43, first cover body; 431, first vent; 44, first rotating cover; 441, first vent; 441', vent; 45, first cavity 5, sterilization box; 51, sterilization tablet; 52, the second base; 53, the second cover; 531, the second vent; 54, the second rotating cover; 541, the ventilation opening; 55, the second cavity; 6. Ear strap; 61. Adjusting the connecting end; 611. The convex part.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Embodiment 1

As shown in Figures 1 and 2, the present invention provides a breathing filter, comprising a filter box 1 and a replaceable filter element assembly 2, wherein: the filter box 1 has an outer filter cover 11 and an inner filter cover that can be snapped together. Layer filter cover 12, a accommodating cavity 13 is formed between the outer filter cover 11 and the inner filter cover 12, and the bottom of the inner filter cover 12 is provided with a first accommodating cavity 14 and a second accommodating cavity 15 and the third accommodating cavity 16, the inner surface of the inner filter cover 12 is provided with at least one convex rib 121; the replaceable filter element assembly 2 has a first replaceable filter element 21 that can be placed in the first accommodating cavity 14, The second replaceable filter element 22 can be placed in the second accommodating cavity 15 , and the third replaceable filter element 23 can be placed in the third accommodating cavity 16 .

In the breathing filter of the present invention, the filter box 1 is made of resin or thermoplastic elastomer material, and the outer filter cover 11 and the inner filter cover 12 of the filter box 1 can be opened and closed together. The replacement of the first replaceable filter element 21 , the second replaceable filter element 22 and the third replaceable filter element 23 of the replacement filter element assembly 2 makes the breathing filter reusable, with a simple structure and convenient operation.

In addition, in the present invention, the first replaceable filter element 21 is SMS meltblown non-woven fabric, photocatalyst non-woven fabric or PTFE microporous membrane non-woven fabric; the second replaceable filter element 22 is activated carbon non-woven fabric; the The third replaceable filter element 23 is an activated carbon fiber felt pad or non-woven fabric. When the protection requirements for bacteria, viruses, harmful gases, etc. are high, the first replaceable filter element 21 in the first accommodating chamber 14 is taken out and placed in the accommodating chamber between the outer filter cover 11 and the inner filter cover 12 13 for protection; when it is necessary to protect fine particles such as PM2.5 in haze weather, take out the second replaceable filter element 22 in the second accommodating chamber 15, and put it into the outer filter cover 11 and the inner filter. Protection is performed in the accommodating cavity 13 between the filter covers 12; when the pollen or larger dust particles are protected, the third replaceable filter element 23 in the third accommodating cavity 16 is taken out and put into the outer filter cover 11 It is protected in the accommodating cavity 13 between it and the inner filter cover 12 .

Therefore, in the breathing filter of the present invention, three different types of replaceable filter elements can be placed, and according to different protection scenarios, a replaceable filter element with a suitable protection level can be selected at any time, which can prevent pollen and dust, haze, bacteria and viruses, etc. When the harmful substances reach a certain level, the replaceable filter element in the accommodating cavity 13 between the outer filter cover 11 and the inner filter cover 12 can be replaced.

Specifically, please refer to FIG. 2 , the outer filter cover 11 is generally in the shape of a cuboid with an upper arc transition. The outer filter cover 11 has a filter cover body 112 and a protrusion connected to the outer periphery of the filter cover body 112 . The filter cover body 112 is provided with a plurality of ventilation mesh holes 111 , and the ventilation mesh holes 111 communicate with the accommodating cavity 13 . In this embodiment, without affecting the use, the ventilation grid holes 111 are designed to have a larger airflow area as much as possible to facilitate the rapid flow of gas. The present invention does not vary the diameter of the ventilation grid holes 111. The size is limited, as long as the gas flow can be achieved.

As shown in FIG. 3 , the inner filter cover 12 of the present invention is shown. The inner filter cover 12 is provided with a connecting convex portion 17 , and the connecting convex portion 17 has a channel 171 that can communicate with the accommodating cavity 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 outer The protruding edges of the layer filter cover 11 can be inserted into the grooves 123 of the inner layer filter cover 12, so as to realize the connection between the inner layer filter cover 12 and the outer layer filter cover 11. It can make the opening and closing of the outer filter cover 11 and the inner filter cover 12 easier and faster; of course, in other embodiments, grooves can be provided on the outer periphery of the outer filter cover 11, and the corresponding inner filter cover 12 The outer periphery of the filter is provided with protruding ribs, or, in another embodiment, the snap connection between the outer filter cover 11 and the inner filter cover 12 can also be connected by magnet adsorption, or bonding, pin connection, etc. Other connection methods are not limited here.

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

Further, at least one ridge 121 is provided on the inner side of the inner filter cover 12, and these ridges 121 are arranged parallel to each other on the inner side of the inner filter cover 12 and the outer filter cover 11 opposite, and these ridges 121 Across the channel 171 connecting the convex portion 17 , the convex ribs 121 can not only divide the inner filter cover 12 into a plurality of cavities, increase the flow area of the airflow, but also can be used for pressing and placing in the accommodating cavity 13 . The purpose of the first replaceable filter element 21, the second replaceable filter element 22 or the third replaceable filter element 23 in the

In one embodiment of the present invention, at least two connecting rings 18 are symmetrically arranged on the outer periphery of the outer filter cover 11 , and the ear straps 6 can be clipped inside the connecting rings 18 . As shown in FIG. 11 , the earband 6 is generally in the shape of a long strip, which can have a certain width. There are two adjustment connection ends 61 at both ends of the earband 6 , and each adjustment connection end 61 is provided with a plurality of protrusions at intervals. The connection between the filter box 1 and the ear band 6 can be realized by inserting the convex portion 611 into the connecting ring 18 . The earband 6 is made of non-toxic and high-elastic silica gel material. Antibacterial agents, preferably nano-silver ions, are added to the silica gel material, which has an antibacterial and self-cleaning effect. Realize the structure design of adjustable buckle.

In the present embodiment, a connecting ring 18 is respectively provided on two opposite outer edges of the outer filter cover 11, and there is one earband 6, and the two adjustment connecting ends 61 of the earband 6 are respectively connected with the corresponding The rings 18 are connected; of course, in other embodiments, two or more connecting rings 18 may be respectively provided on the two opposite outer edges of the outer filter cover 11, and correspondingly, the earbands 6 There may be two or more, which is not limited here. According to the number of connecting rings 18 set on the outer filter cover 11, the earband 6 can be fixed at two or four points, and the adjustable buckle design is adopted to make it more comfortable, stable and convenient to wear. .

In an embodiment of the present invention, as shown in FIG. 1 to FIG. 3 , a first support rod 141 and a second support rod 141 and a second support rod 141 and a second support rod are respectively penetrated in the first accommodating cavity 14 , the second accommodating cavity 15 and the third accommodating cavity 16 . Rod 151 and third rod 161, the first replaceable filter element 21 can be wound on the first rod 141, the second replaceable filter element 22 can be wound on the second rod 151, the third replaceable The filter element 23 can be wound on the third support 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 Each replaceable filter element is conveniently accommodated in each accommodating cavity and easy to take out, and in addition, the flatness of each replaceable filter element can be ensured to the greatest extent.

Further, the first support rod 141 protrudes from both ends of the first accommodating cavity 14 , the second support rod 151 protrudes from both ends of the second accommodating cavity 15 , and the third support rod 161 protrudes from the third accommodating cavity 16 . Two first end caps 142 , two second end caps 152 and two third end caps 162 are respectively covered at both ends of the .

Of course, in the present invention, in order to distinguish the types of the replaceable filter elements and facilitate protection of different levels, the first end cap 142 , the second end cap 152 and the third end cap 162 can be set in different colors or shapes , which is not limited here. When replacing each replaceable filter element in different protection scenarios, wrap the unfolded replaceable filter element around each support rod and put it into the corresponding accommodating cavity, and then unfold the required replaceable filter element, and pass through the inner side of the inner filter cover 12 The rib 121 of the When the harmful substances reach a certain level, it is enough to replace the required new replaceable filter element.

Embodiment 2

As shown in FIGS. 4 to 10 , the present invention also provides a protective mask, including a cover body 3, a breathing filter, a breathing valve 4 and a disinfection box 5, wherein: the cover body 3 has an inner cavity that can be connected with the cover body 3. 34 connected first opening 31, second opening 32 and third opening 33, the second opening 32 and third opening 33 are respectively located on both sides of the first opening 31; the breathing filter is described in Embodiment 1 The specific structure, working principle and beneficial effects of the breathing filter will not be repeated here. The inner filter cover 12 of the breathing filter can be tightly connected with the first opening 31 of the cover body 3; the breathing valve 4 is sealedly installed at the second opening 32 of the cover body 3; At the three openings 33 , a sterilizing sheet 51 is placed in the sterilizing box 5 .

The protective mask of the present invention is provided with a switchable breathing valve 4. By opening or closing the breathing valve 4, the flow of air flow is controlled, so that the wearer can choose whether to use the breathing valve 4 in different protection scenarios; A sterilization box 5 is also provided, and a sterilization sheet 51 is placed in the sterilization box 5. The sterilization sheet 51 can quickly and effectively kill viruses, bacteria, pollen, etc. In addition, the filter box 1 of the respiratory filter of the protective mask is made of resin or thermoplastic elastomer material, and the outer filter cover 11 and the inner filter cover 12 of the filter box 1 can be snapped together. , 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, so that the protective port can be reused, and the structure is simple and the operation is convenient.

Specifically, as shown in FIG. 6 , the shape of the first opening 31 on the cover body 3 matches the shape of the connecting protrusion 17 on the inner filter cover 12 of the breathing filter, and the first opening 31 is connected to the cover body. The inner cavity 34 of the cover body 3 is connected; the second opening 32 on the cover body 3 is located on one side of the first opening 31, the second opening 32 is communicated with the inner cavity 34 of the cover body 3, and the area of the second opening 32 is The area of the second opening 32 is smaller than the area of the first opening 31, and the second opening 32 is used for connecting with the breathing valve 4; the third opening 33 on the cover body 3 is located on the other side of the first opening 31, and the area of the third opening 33 is smaller than that of the The area of an opening 31 , the third opening 33 is used to connect with the sterilization box 5 . In this 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 as to inhale the external air and exhale the wearer. When the wearer's gas flows, the gas flows faster, allowing the wearer to breathe more smoothly.

The cover body 3 in this embodiment is made of silicone rubber material, and the hardness of the silicone rubber is 30A~80A, so that the cover body 3 has a certain degree of flexibility. In addition, because the silicone rubber has the characteristics of stable chemical properties, the cover body 3 can be sterilized and disinfected many times, easy to clean, has strong chemical stability, can be reused, and prolongs the multi-purpose silicone protective mask that can be kept dry. It has a long service life and reduces the pollution of discarded masks to the environment.

In an embodiment of the present invention, as shown in FIG. 7 and FIG. 8 , the breathing valve 4 includes a first base 41 , a valve plate 42 , a first cover 43 and a first rotating cover 44 . The first base 41 The valve plate 42 is located in the first cavity 45 formed between the first cover body 43 and the first base 41, and the first rotating cover 44 is rotatably connected to the second opening 32 of the cover body 3. On the first cover body 43 , the first cover body 43 and the first rotating cover 44 are provided with a plurality of first ventilation openings 431 and a plurality of first ventilation openings 441 . When a vent 441 is rotated to be opposite to the first vent 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 .

Specifically, the first base 41 has a channel 411, so that after the first base 41 is connected to the second opening 32 of the cover body 3, the first cavity 45 can be communicated with the inner cavity 34 of the cover body 3 through the channel 411; the The valve plate 42 can be prepared with a rubber composition, including rubber, filler, and anti-tear agent. The rubber content is more than 50%, and the rubber content is relatively high. It has high elasticity and tear resistance, and prolongs its service life. . In this embodiment, the thickness of the valve plate 42 is 0.2 mm˜0.5 mm. The function of the valve plate 42 is: when exhaling, the positive pressure of the exhaust gas will blow the valve plate 42 open to quickly remove the exhaust gas in the cover 3, and the negative pressure during inhalation will automatically close the valve plate 42 In the channel 411 of the first base 41, the breathing valve 4 is closed at this time, so as to avoid inhalation of pollutants in the external environment.

In this embodiment, the total area of the plurality of first ventilation openings 441 on the first rotating cover 44 is half of the outer surface area of the first rotating cover 44 , and the plurality of first air vents 441 on the first cover 43 The total area of a vent 431 is half of the outer surface area of the first cover 43 , and the first rotating cover 44 can be screwed on the first cover 43 or sleeved on the first cover 43 , when the plurality of first vents 441 on the first rotating cover 44 are rotated to be opposite to the plurality of first vents 431 on the first cover 43, the external fluid can pass through the first rotating cover 44, the first cover 43 flows into the first cavity 45 , and flows into the inner cavity 34 of the cover body 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 vent 441 on the first rotating cover 44 can also be designed as a semicircular vent 441 ′, and the ventilation on the first rotating cover 44 is not used here. The structure of the port is specifically limited, as long as the first rotating cover 44 is provided with a ventilation port.

By adjusting the relative positions of the first vent 441 of the first rotating cover 44 and the first vent 431 of the first cover 43 , the breathing valve 4 can be opened or closed, thereby controlling the flow of air, which is convenient for the wearer in different protections. The scene selects whether to use the breathing valve 4. When protecting against bacteria and viruses, in order to prevent the exhaled gas from harming others, the breathing valve 4 can be closed; when performing general pollen or dust protection, the breathing valve 4 can be opened to make breathing easier and keep the cover 3 dry.

In one embodiment of the present invention, as shown in FIGS. 9 and 10 , the sterilization box 5 includes a second base 52 , a second cover 53 and a second rotating cover 54 , and the second base 52 can be sealingly connected to the At the third opening 33 of the cover body 3, a second cavity 55 is formed between the second base 52 and the second cover body 53, which can accommodate the sterilization sheet 51, and the second rotating cover 54 is rotatably connected to the second On the cover body 53, the second cover body 53 is provided with a plurality of second ventilation openings 531, the second rotating cover 54 is provided with ventilation openings 541, and the ventilation openings 541 on the second rotating cover 54 are rotated to the same level as the first rotating cover 54. When the plurality of second vents 531 on the two cover bodies 53 are opposite to each other, the external fluid can flow into the second cavity 55 through the second rotating cover 54 and the second cover body 53 , thereby facilitating the flow of the second cavity 55 . The bactericidal tablet is a slow-release bactericidal agent to achieve the purpose of quickly and effectively killing viruses, bacteria, pollen and other harmful substances around the protective mask.

In this embodiment, the bottom of the second base 52 is a sealing structure, and no airflow passes between it and the cover body 3 . The total area of the ventilation openings 541 on the second rotating cover 54 is 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 the second One half of the outer surface area of the 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 on the second rotating cover 54 When the opening 541 is rotated to be opposite to the plurality of second vents 531 on the second cover 53 , the external fluid can flow into the second cavity 55 through the second rotating cover 54 and the second cover 53 , so as to communicate with the second cavity 55 . The sterilizing sheet 51 in the cavity 55 is in contact, and the sterilizing sheet 51 can quickly and effectively kill the surrounding viruses, bacteria, pollen and other harmful substances by continuously emitting chlorine dioxide with a minimum concentration that is harmless to the human body. When the protection requirement is high, adjust 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, so that the disinfection box 5 has airflow to the outside world, thereby making the disinfection and sterilization agent slow down. It is released around the wearer to improve the protection effect; when the protection requirements are low, adjust 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 53 to prevent the disinfection box 5 from interacting with the outside world. The airflow can be circulated, and the use time of the sterilization sheet 51 is prolonged.

For the protective mask of the present invention, according to different protection scenarios and protection requirements, a suitable filter element can be selected, and the opening or closing of the breathing valve 4 can be selected, and whether to use the sterilization sheet 51 can be selected, so as to effectively prevent bacteria, viruses, harmful gases, fine particles, etc. The intrusion of harmful substances such as particles, pollen and dust plays a protective role.

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 contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims (14)

1. a breathing filter, is characterized in that, comprises: The filter box has an outer layer filter cover and an inner layer filter cover that can be buckled together, a accommodating cavity is formed between the outer layer filter cover and the inner layer filter cover, and the bottom of the inner layer filter cover is provided with a first accommodating cavity, a second accommodating cavity and a third accommodating cavity, the inner side surface of the inner layer filter cover is provided with at least one convex edge; A replaceable filter element assembly having a first replaceable filter element that can be placed in the first receiving cavity, a second replaceable filter element that can be placed in the second receiving cavity, and a third receiving cavity that can be placed The third replaceable filter element inside. 2 . The breathing filter according to claim 1 , wherein a plurality of ventilation mesh holes are provided on the outer filter cover, and the plurality of ventilation mesh holes are communicated with the accommodating cavity. 3 . 3 . The breathing filter according to claim 1 , wherein a connecting convex portion is provided on the inner filter cover, and the connecting convex portion has a channel that can communicate with the accommodating cavity. 4 . 4. breathing filter as claimed in claim 1, is characterized in that, described first replaceable filter element is SMS melt-blown non-woven fabric, photocatalyst non-woven fabric or PTFE microporous membrane non-woven fabric; The replacement filter element is an activated carbon non-woven fabric; the third replaceable filter element is an activated carbon fiber felt pad or a non-woven fabric. 5. The breathing filter according to claim 1, wherein the filter box is a filter box made of resin or thermoplastic elastomer material. 6 . The breathing filter according to claim 1 , wherein at least two connecting rings are symmetrically arranged on the outer periphery of the outer filter cover, and the ear straps can be clipped inside the connecting rings. 7 . 7 . The breathing filter according to claim 1 , wherein a first support rod and a second support rod pass through the first accommodating cavity, the second accommodating cavity and the third accommodating cavity respectively. 8 . A rod and a third support rod, the first replaceable filter element can be wrapped around the first support rod, the second replaceable filter element can be wrapped around the second support rod, and the third replaceable filter element can be wrapped around the second support rod. A replacement filter element can be wrapped around the third strut. 8 . The breathing filter according to claim 7 , wherein the first support rod protrudes from both ends of the first accommodating cavity, and the second support rod protrudes from the second accommodating cavity. 9 . The two ends and the two ends of the third support rod extending out of the third accommodating cavity are respectively covered with two first end caps, two second end caps and two third end caps. 9. A protective mask, characterized in that, comprising: a cover body, having a first opening, a second opening and a third opening that can communicate with the inner cavity of the cover body, the second opening and the third opening are respectively located on both sides of the first opening; The breathing filter according to any one of claims 1 to 8, wherein the inner filter cover of the breathing filter can be sealedly connected to the first opening of the cover body; a breathing valve, sealed and installed at the second opening of the cover body; A sterilization box is sealed and installed at the third opening of the cover body, and a sterilization sheet is placed in the sterilization box. 10. The protective mask according to claim 9, wherein the breathing valve comprises a first base, a valve plate, a first cover and a first rotating cover, and the first base can be sealingly connected to the cover At the second opening of the body, the valve plate is located in the first cavity formed between the first cover body and the first base, and the first rotating cover is rotatably connected to the first cover On the body, the first cover body and the first rotating cover are both provided with a plurality of first ventilation openings, and the first ventilation openings on the first rotating cover rotate to be connected with the first cover body. In a state where the first ventilation openings of the two are opposite to each other, the external fluid can flow into the first cavity through the first rotating cover and the first cover body. 11. The protective mask according to claim 9, wherein the sterilization box comprises a second base, a second cover and a second rotating cover, and the second base can be sealingly connected to the second base of the cover. At the three openings, a second cavity for accommodating the sterilizing sheet is formed between the second base and the second cover, and the second rotating cover is rotatably connected to the second cover , the second cover body is provided with a plurality of second ventilation openings, the second rotating cover is provided with ventilation openings, and the ventilation openings on the second rotating cover are rotated to be connected with the second cover body. In a state where the plurality of second ventilation openings are opposite, external fluid can flow into the second cavity through the second rotating cover and the second cover body. 12 . The protective mask according to claim 9 , wherein the cover body is a cover body made of a silicone rubber material, and the hardness of the silicone rubber is 30A-80A. 13 . 13. The protective mask according to claim 10, wherein the thickness of the valve sheet is 0.2 mm to 0.5 mm. 14. The protective mask of claim 9, wherein 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.

Images