WO2021223691A1

WO2021223691A1 - Novel filter sheet

Info

Publication number: WO2021223691A1
Application number: PCT/CN2021/091794
Authority: WO
Inventors: 熊长伦
Original assignee: 深圳市那尼科技有限公司
Priority date: 2020-05-04
Filing date: 2021-05-01
Publication date: 2021-11-11

Abstract

A novel filter sheet, comprising a filter sheet body; the filter sheet body is provided with a suspension structure, the middle portion of the filter sheet body is a region for filtering breathed air, and the filter sheet body is suspended, by means of the suspension structure, on a face frame or a mask used for compressing the filter sheet body, and a hanging string or an elastic cord of the face frame or the mask fits the head so as to wear the filter sheet body. Another novel filter sheet, comprising a filter sheet body; a fixing structure is provided at an edge of the filter sheet body so as to prevent a gap from being formed between the filter sheet body and a mask caused by the displacement of the whole or a part of the filter sheet body relative to the mask, and the middle portion of the filter sheet body is a region for filtering breathed air. By developing a novel filter sheet for matched use with a face frame or a mask, the filter sheet tightly seals the face, and such filter sheet is provided with no metal strip or hanging string, thus greatly increasing the production capacity of such filter sheet, and also reducing costs.

Description

A new type of filter

Technical field

The invention relates to the technical field of medical equipment and labor protection products, in particular to a new type of filter sheet.

Background technique

Many protective masks are used in medical treatment, some are anti-virus and some are dust-proof, but the current masks are not closely attached to the human face, so that dust and viruses enter the respiratory tract and cause the mask to lose its proper function. For now, this problem has been noticed and some measures have been taken, such as setting up an iron clip on the bridge of the nose and pinching the iron clip when wearing a mask to fit the bridge of the nose, but this iron clip will become loose. Fatigue, using iron clips cannot completely prevent dust and viruses from entering the gap between the mask and the face.

For example, in China, some medical staff wear a four-layer mask to prevent the inhalation of the virus, but the result is still infected with the virus. The reason is not that the mask is not well protected, but the breathability of the mask after wearing the four-layer mask. It is worse, so the air enters directly from the gap between the mask and the face. At this time, the effect is worse than wearing a layer of mask.

These masks cannot prevent viruses from entering the gap between the mask and the human face. The filtering capacity of the mask itself can be micron level, and water can't pass through. However, after wearing the mask, the gap between the mask on both sides of the bridge of the nose and the face is quite large, it can be said to be centimeter level, and it can be put down. A finger, wearing a mask like this, what good is a mask for?

Due to the different facial shapes of the human body, such as the lower nose bridge of Eastern people and the higher nose bridge of Westerners, it is difficult to make a mask fit everyone's face completely. Therefore, it is necessary to design a face frame or mask for the fit problem between the human body and the protective equipment, and it is necessary to develop a new type of filter to cooperate with.

Since there are tools to press the mask on the face, the metal strip and lanyard can be omitted for the mask, which greatly reduces the process of mask production, greatly improves the production capacity of the mask, and reduces the cost.

In the present invention, a hanging hole is provided on the mask, so that the mask can be hung on the hanging post that compresses the face frame of the mask before wearing the mask, so that it is convenient for the user to wear the mask conveniently, and the mask does not need hanging ropes and metal strips. NS.

When the epidemic occurs, a large number of masks are needed, which is a large demand of hundreds of millions and billions of masks a day. The original production speed of masks is slow, and the production capacity cannot be quickly increased. However, the present invention can rapidly increase the production capacity, and can produce 10 The production capacity of Dowan increased to more than 1 million masks per day to meet the needs of epidemic prevention.

Summary of the invention

The technical problem to be solved by the present invention is to provide a new type of filter to solve the problem of low production efficiency of masks.

In order to solve the above technical problems, the technical solution of the present invention is: a new type of filter, including a filter body, the filter body is provided with a hanging structure for hanging on the edge of the side in contact with the bridge of the nose, the filter body The middle part is the area for filtering breathing gas. The filter body is hung on the face frame or mask used to compress the filter body through a suspension structure, and the lanyard or elastic band of the face frame or face mask is put on the head to achieve wearing and filtering片体。 The body.

In the above structure, the suspension structure of the filter body is a suspension hole.

In the above structure, the filter body is a flat body.

In the above structure, the filter body is a square flat body.

In the above structure, the filter body is provided with two hanging holes.

In the above structure, the two suspension holes are symmetrical about the plane passing through the middle of the filter body.

In the above structure, two hanging holes can be placed on both sides of the bridge of the nose.

In the above structure, the filter body is provided with a non-planar symmetric structure that prevents the filter body from being flipped or reversed. The non-planar symmetric structure includes the shape of the filter body, the shape of the hanging holes, the number of hanging holes, and the number of hanging holes. Any one or more of the five elements of position and size of the hanging hole.

In the above structure, the hanging holes are elongated.

In the above structure, the filter body is provided with positioning structures on the left and right sides to center the filter body.

In the above structure, the positioning structure of the filter body is a positioning hole.

In the above structure, the edge of the filter body and the edge of the suspension hole are both welded and connected.

In the above structure, the edge of the filter body and the edge of the positioning hole are both welded and connected.

A new type of filter sheet, comprising a filter sheet body, the filter sheet body is provided with a fixing structure for fixing the filter sheet body on the edge so as to prevent the whole or part of the filter sheet body from shifting relative to the mask or the face frame to cause the filter sheet body There is a gap between the mask and the mask, and the middle part of the filter body is an area for filtering breathing gas.

In the above structure, the fixing structure of the filter body is a fixing hole.

In the above structure, the filter body is provided with a non-planar symmetric structure that prevents the filter body from being flipped or reversed. The non-planar symmetric structure includes the shape of the filter body, the shape of the fixing holes, the number of fixing holes, and the number of fixing holes. Any one or more of the five elements of position and size of fixed hole.

In the above structure, there are two fixing holes.

In the above structure, there are three fixing holes.

In the above structure, there are four fixing holes.

In the above structure, there are five fixing holes.

In the above structure, there are six fixing holes.

In the above structure, the fixing hole is set as a round hole.

In the above structure, the filter body is a circular filter body or a square filter body.

In the above structure, the fixing holes of the circular filter body are uniformly arranged on the edge of the circular flat body.

In the above structure, the filter body is a centrally symmetrical plane body, and the edges of the filter body are provided with weld lines that weld the layers of the filter body together.

In the above structure, the edges of the fixing holes are all welded connections.

In the above structure, the filter body includes a sterilization layer.

In the above structure, the filter body includes a filter layer.

In the above structure, the filter body also includes an outer layer, a filter layer, a sterilization layer, and an inner layer. The outer layer, the filter layer, the sterilization layer, and the inner layer are placed in sequence. Together.

In the above-mentioned structure, the filter body is arranged without a nose bridge.

In the above structure, the filter body is provided without a lanyard.

The beneficial effect of adopting the above technical solution is: by developing a new type of filter to be used with a face frame or mask, the filter is tightly sealed with the face. This filter has no metal strips and no lanyards, so this The filter production capacity is greatly improved, and the cost is also reduced.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the embodiments. Obviously, the drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

Figure 1 is a three-dimensional view of the face frame used to compress the new filter sheet;

Figure 2 is an exploded view of the face frame used to compress the new filter sheet;

Figure 3 is a perspective view of another structural form of the face frame used to compress the new filter sheet;

Figure 4 is a cross-sectional view of the soft rubber part in the face frame used to compress the new filter sheet;

Figure 5 is a perspective view of the present invention;

Figure 6 is a three-dimensional view of a suspension column with other structural forms of the face frame used to compress the new filter sheet;

Figure 7 is a perspective view of another structure of the face frame used to compress the new filter sheet;

Figure 8 is an exploded view of another structure of the face frame used to compress the new filter sheet;

Figure 9 is a perspective view of the face mask;

Figure 10 is a perspective view of the mask from another angle;

Figure 11 is an exploded view of the mask;

Figure 12 is an exploded view of the mask from another angle;

Figure 13 is a perspective view of a square filter body;

Figure 14 is a perspective view of a circular filter body;

Figure 15 is a perspective view of the mask when the filter body is circular;

Fig. 16 is a schematic diagram of an alternative structure of a positioning hole, a suspension hole, and a fixing hole.

In the picture, 1-soft plastic part, 2-filling hole, 3-suspension column, 4-face frame, 5-liquid air bag, 6-lanyard hole, 7-U-shaped groove, 8-positioning hole, 9-filter Body, 10-Hanging hole, 11-L-shaped suspension column, 12-U-shaped suspension column, 13-hook-shaped suspension column, 14-I-shaped suspension column, 15-nose groove, 16-mask, 17-fixing hole, 18 -Breathing hole, 19-peripheral bone, 20-soft rubber ring, 21-soft rubber ring boss, 22-breathing hole plug, 23-breathing hole plugging position, 24-supporting bone position, 25-fixed column.

Detailed ways

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

In order to further illustrate the embodiments, the present invention is provided with drawings. These drawings are a part of the disclosure of the present invention. They are mainly used to illustrate the embodiments, and can cooperate with the relevant descriptions in the specification to explain the operating principles of the embodiments, with reference to Those of ordinary skill in the art should be able to understand other possible implementation manners and advantages of the present invention from these contents. The components in the figure are not drawn to scale, and similar component symbols are usually used to indicate similar components.

With reference to the drawings, a new type of filter includes a filter body 9, which is provided with a hanging structure for hanging on the edge of the filter body 9 on the side contacting the bridge of the nose, and the middle of the filter body 9 is used to filter breathing gas In the area where the filter body 9 is hung on the face frame 4 or mask used to compress the filter body through a suspension structure, and the lanyard or elastic band of the face frame 4 or the face mask 16 is put on the head to realize the wearing of the filter body 9, as shown in Figure 5.

Preferably, the suspension structure of the filter body 9 is a suspension hole 10.

Preferably, the filter body 9 is a flat body.

Preferably, the filter body 9 is a square flat body.

Preferably, the filter body 9 is provided with two hanging holes 10, and the two hanging holes 10 can be placed on both sides of the bridge of the nose.

Preferably, the two suspension holes 10 are symmetrical about a plane passing through the middle of the filter body 9.

Preferably, the filter body 9 is provided with a non-planar symmetric structure that prevents the filter body 9 from being flipped or reversed. The non-planar symmetric structure includes the shape of the filter body 9, the shape of the suspension hole 10, and the suspension hole 10. Any one or more of the five elements, the number of the suspension holes 10, the position of the suspension holes 10, and the size of the suspension holes 10. This is mainly to prevent the front and back of the filter body 9 from being installed upside down, so the structure is used to ensure that the user cannot install upside down. The non-planar symmetric structure refers to any plane passing through the filter body 9 and perpendicular to the filter body 9.

Preferably, the suspension hole 10 is elongated. The elongated suspension hole 10 can be suitable for suspension columns 3 of different distances or different suspension holes 10 required for the same suspension column 3 in different situations, such as two masks with thick and thin nose bridges between the same suspension columns 3 The distance between the two suspension holes 10 required is different.

Preferably, the edge of the filter body 9 and the edge of the suspension hole 10 are both welded and connected.

Preferably, the filter body 9 is provided with positioning holes 8 on the left and right sides so as to center the filter body 9 in the face frame 4 or the mask 16. The face frame 4 or the mask 16 is provided with a positioning post for positioning the filter body 9, and the positioning post passes through the positioning hole 8 to position the filter body 9.

Preferably, the edge of the filter body 9 and the edge of the positioning hole 8 are both welded and connected.

The edges of the positioning hole 8 and the edges of the suspension hole 10 are both welded, so that the edges of the positioning hole 8 and the suspension hole 10 are not easily torn, and the strength is strengthened.

Preferably, the filter body 9 includes a sterilization layer.

Preferably, the filter body 9 includes a filter layer.

Preferably, the filter body 9 also includes an outer layer, a filter layer, a sterilization layer, and an inner layer. The outer layer, the filter layer, the sterilization layer, and the inner layer are placed in sequence. The edges of the outer layer, the filter layer, the sterilization layer, and the inner layer are welded to Together.

Preferably, the filter body 9 is provided without a nose bridge.

Preferably, the filter body 9 is provided without a lanyard.

A new type of filter sheet includes a filter sheet body 9. The filter sheet body 9 is provided with a fixing structure for fixing the filter sheet body 9 at the edge so as to prevent the whole or part of the filter sheet body 9 from moving relative to the mask 16 or the face frame 4. This position creates a gap between the filter body 9 and the mask 16, and the middle of the filter body 9 is an area for filtering breathing gas.

Preferably, the fixing structure of the filter body 9 is a fixing hole 17. The mask 16 is provided with a fixing post 25 that can pass through the fixing hole 17.

Preferably, the filter body 9 is provided with a non-planar symmetric structure that prevents the filter body 9 from being flipped or reversed. The non-planar symmetric structure includes the shape of the filter body 9, the shape of the fixing holes 17, and the number of fixing holes 17. , Any one or more of the five elements of the position of the fixing hole 17 and the size of the fixing hole 17. By providing a non-planar symmetric structure, the front and back of the filter body 9 are reversed, that is, upside-down. The non-planar symmetric structure means that the two parts of the filter body 9 that are folded in half will not be the same and will not overlap.

Preferably, there are two fixing holes 17.

Preferably, the number of fixing holes 17 is three.

Preferably, the number of fixing holes 17 is four.

Preferably, the number of fixing holes 17 is five.

Preferably, the number of fixing holes 17 is six.

Preferably, the fixing hole 17 is configured as a round hole.

Preferably, the filter body 9 is a circular filter body 9 or a square filter body 9.

Preferably, the fixing holes 17 of the circular filter body 9 are evenly arranged on the edge of the circular flat body.

Preferably, the filter body 9 is a centrally symmetrical plane body, and the edge of the filter body 9 is provided with a welding line that welds the layers of the filter body 9 together.

Preferably, the edges of the fixing holes 17 are all welded connections.

The non-planar symmetrical structure is used to prevent the filter from being installed upside down. Sometimes it is not possible to use color markings. Only a non-planar symmetrical structure is set. .

In a specific embodiment: this new type of filter is used in conjunction with a face frame 4 for pressing the body 9 of the filter.

A face frame assembly for pressing a mask, comprising an airtight soft rubber piece 1, a face frame 4, the soft rubber piece 1 is a soft and/or elastic ring body or is surrounded by a plurality of other shapes Ring body, the soft rubber piece 1 is connected to the face frame 4, the face frame 4 is provided with a suspension column 3 for hanging the filter body 9, and the filter body 9 can be hung on the suspension column 3. The frame 4 is provided with an installation structure for lanyard or elastic band installation. When wearing, the face frame 4, the soft rubber piece 1, the filter body 9, and the face are placed in sequence. The soft rubber piece 1 is a ring body, and the middle of the ring body As a breathing channel, the soft rubber piece 1 and the face frame 4 can surround the mouth and nose in the middle, as shown in Figure 1, Figure 2, Figure 3, and Figure 4.

The cross section of the soft rubber piece 1 is a U-shaped groove 7, and the edge of the inner side wall or the edge of the outer side wall of the U-shaped groove 7 is connected to the surface frame 4.

The soft rubber piece 1 and the face frame 4 are integrally formed in the same manner.

The soft rubber piece 1 is provided with a nose groove 15 for avoiding the bridge of the nose.

The face frame 4 is a curved surface with a curvature on the side facing the face.

The soft plastic part 1 is colorless medical silica gel.

The soft rubber piece 1 is airtight.

The suspension column 3 is arranged on the side edge of the nose bridge of the face frame 4 and/or the soft rubber piece 1.

The suspension column 3 includes an L-shaped suspension column 11 and/or a U-shaped suspension column 12 and/or a hook-shaped suspension column 13 and/or an I-shaped suspension column 14, as shown in FIG. 6.

The face frame 4 is an annular body.

The installation structure is the strap hole 6.

In this way, the filter body 9 can be sealed well for those with a high nose bridge to ensure that the air they breathe is filtered by the filter body 9. Originally, a metal strip was used to solve this problem. This metal strip is talking, coughing, etc. The action is released, which is a big problem.

Since the face frame 4 for sealing was developed for sealing between the filter body 9 and the human body, the soft rubber piece 1 is airtight and soft in texture, so that the soft rubber piece 1 can filter under a small external force. The sheet body 9 is fully attached to the face of the human body so as to be completely sealed, thereby preventing gas from entering and exiting the gap between the human body and the filter sheet body 9. By arranging the soft rubber piece 1 into a U-shaped groove 7, the force when the soft rubber piece 1 is sealed is small, and by setting the hanging column 3 on the face frame 4, it is much more convenient to wear the filter body 9. Therefore, a corresponding hanging mask was developed to cooperate with it. This mask has no metal strips and no lanyards, so the production capacity of this mask is greatly improved, and the cost is also reduced.

Especially in terms of increasing production capacity, it is of great significance, which can prepare for the spread of respiratory infectious diseases worldwide.

In a specific embodiment: this new type of filter is used in conjunction with a face frame 4 with a liquid bladder to compress the filter body 9.

A face frame assembly with liquid airbags includes a face frame 4 that can enclose the nose and mouth parts in the middle. The face frame 4 is provided with a liquid airbag 5 for pressing the filter body 9 on the face of the human body. The middle part of the face frame 4 is provided with a breathing channel for air in and out, the face frame 4 is connected with the liquid air bag 5, the face frame 4 is a ring body, and the face frame 4 is provided with a nasal groove that avoids the bridge of the nose. The surface frame 4 is provided with a hanging column 3 for hanging the filter body 9, the filter body 9 can be hung on the hanging column 3, and the surface frame 4 is provided with a lanyard installation structure for installing a lanyard. The face frame 4, the liquid bladder 5 and the filter body 9, and the human body face are placed from the outside to the inside. The face frame 4 can compress the filter body 9 so that the filter body 9 and the face are closely attached to prevent the air from being breathed. It is not filtered by the filter body 9 and infected with viruses, as shown in Figs. 7 and 8.

The liquid balloon 5 is not filled with gas and/or liquid in its cavity, but is provided with a filling hole 2 and it is indicated that the volume filled at room temperature and pressure is less than the maximum volume of gas and the cavity that can be filled at room temperature and pressure. / Or the volume of the gas and/or liquid filled in the cavity after the liquid is used at normal temperature and pressure is smaller than the maximum volume that the cavity can be filled under normal temperature and pressure.

The liquid bladder 5 is not filled with gas and/or liquid in its cavity, but is provided with a filling hole 2 and the volume filled at room temperature and pressure is indicated to be six minutes of the maximum volume that the cavity can be filled at room temperature and pressure. One to five-sixths of the gas and/or liquid is used or the volume of the gas and/or liquid filled in the cavity at room temperature and pressure is the maximum volume that the cavity can be filled at room temperature and pressure One-sixth to five-sixths.

The liquid balloon 5 is not filled with gas and/or liquid in its cavity, but is provided with a filling hole 2 and the volume filled at room temperature and pressure is indicated to be one-third of the maximum volume that the cavity can be filled at room temperature and pressure. One to two-thirds of the gas and/or liquid is used or the volume of the gas and/or liquid filled in the cavity at room temperature and pressure is the maximum volume that the cavity can be filled at room temperature and pressure One-third to two-thirds.

The liquid balloon 5 is not filled with gas and/or liquid in its cavity, but is provided with a filling hole 2 and the volume filled at room temperature and pressure is indicated to be half of the maximum volume that the cavity can be filled at room temperature and pressure. One to two-thirds of the gas and/or liquid is used or the volume of the gas and/or liquid filled in the cavity at room temperature and pressure is the maximum volume that the cavity can be filled at room temperature and pressure One-half to two-thirds.

The liquid balloon 5 is not filled with gas and/or liquid in its cavity, but is provided with a filling hole 2 and the volume filled at room temperature and pressure is indicated to be one-third of the maximum volume that the cavity can be filled at room temperature and pressure. One to one-half of the gas and/or liquid is used or the volume of the gas and/or liquid filled in the cavity at room temperature and pressure is the maximum volume that the cavity can be filled at room temperature and pressure One-third to one-half.

After the liquid balloon 5 is filled with liquid or gas, its maximum radius is R, so the liquid balloon 5 can fill the gap between 0-2R. If the liquid balloon 5 is multi-layered and there are N layers, the liquid balloon 5 can fill the gap between 0-2NR. The face frame 4 sealed with a liquid bladder has the same pressure on all parts, so there will be no marks on the face.

By using the face frame 4 to press the filter body 9 on the face, the liquid air bag 5 is not filled with gas, so that the liquid air bag 5 can bulge in the recessed part of the human body under the action of a small external force, and the protrusion of the human body The place can be collapsed, so that the face frame 4 is fully attached to the human body, so that there is no gap between the filter body 9 and the face, so that the breathed air is filtered by the filter body 9 to prevent viruses from entering the mouth and nose and becoming infected. This kind of mask has no metal strips and no lanyard, so the production capacity of this kind of mask is greatly improved, and the cost is also reduced.

The new type of filter that can be hung can be worn tightly by the face frame. The face frame is sealed with soft rubber parts and sealed with a liquid air bag. The new type of filter with fixed holes can only be worn with a face mask.

In a specific embodiment: this new type of filter is used in conjunction with a mask 16.

Since this new filter is used in conjunction with the mask 16, the mask 16 is introduced below:

A mask 16 includes a mask body that can cover the mouth and nose. The mask body is provided with breathing holes 18 for air in and out. The peripheral edges of the mask body are provided with liquid air bags 5 for direct or indirect contact with the human face. There is a cavity inside the liquid air bag 5, and the mask body is connected to the liquid air bag 5. The mask body can include parts that cover the nose and mouth, as well as parts that cover the eyes, as shown in Figures 9 and 10.

The liquid balloon 5 is filled with gas and/or liquid in its cavity, and the volume of the gas and/or liquid filled in the liquid balloon 5 at room temperature and pressure is smaller than that of the cavity at room temperature and pressure. The maximum volume that can be filled under pressure. For example, the maximum volume that can be filled inside the liquid balloon 5 refers to the volume of the liquid balloon 5 when the gas and/or liquid pressure in the liquid balloon 5 is equal to one atmospheric pressure and the temperature is 20 degrees Celsius, that is, the liquid balloon 5 The volume that can be filled with the most water. When in use, the volume of the inflated body and/or liquid in the cavity of the liquid airbag 5 under normal temperature and pressure is smaller than the maximum volume that the cavity can be filled under normal temperature and pressure. This is because the liquid balloon 5 is a non-elastic sealed balloon body. If it is elastic, the volume of gas in the liquid balloon 5 is uncertain, and the entire liquid balloon 5 can be filled. Normal temperature and normal pressure means a standard atmospheric pressure and a temperature of 20 degrees Celsius. For example, the inflated body and/or liquid in the cavity of the liquid balloon 5 can be gas, liquid, or liquid plus gas. The inflated body and/or liquid in the cavity of the liquid balloon 5 The volume refers to the sum of the volume of gas and liquid. If there is gas, it is calculated as the volume of gas. If there is liquid, it is calculated as the volume of liquid. If there is both gas and liquid, it is calculated as the sum of the two volumes. The inflated body and/or the liquid in the liquid in the cavity of the liquid balloon 5 includes a high-elasticity material that can flow, which can also flow or deform under pressure.

The volume of the gas and/or liquid filled in the cavity of the liquid balloon 5 at room temperature and pressure is less than one-third to one-half of the maximum volume that the cavity can be filled at room temperature and pressure. . When in use, the volume of the inflated body and/or liquid in the cavity of the liquid airbag 5 at room temperature and pressure is one-third to one-half of the maximum volume that the cavity can be filled at room temperature and pressure. . For example, because the liquid air bag 5 is not filled with gas, the liquid air bag 5 can bulge in the concave part of the human body under the action of a small external force, and can collapse in the convex part of the human body, so that the mask body can fully fit with the human body, thereby being complete. seal. If it is an elastic liquid balloon 5, the liquid balloon 5 can be filled with gas and/or liquid. However, to make the mask body fully fit the human body, a relatively large external force is required.

A surrounding bone 19 is provided around the breathing hole 18, and a soft rubber ring boss 21 for placing a soft rubber ring 20 is provided on the inner side of the surrounding bone 19. The breathing hole 18 is provided in the middle of the mask body, corresponding to the mouth, or may be provided on the side of the mask body, corresponding to the corners of the mouth, as shown in Figs. 11 and 12.

It also includes a breathing hole plug 22 for fixing the filter body 9 and a soft rubber ring 20 for sealing the filter body 9. The soft rubber ring 20 is arranged on both sides of the filter body 9, and the breathing hole plug 22 Set to compress the soft rubber ring 20. The breathing hole 18 is also provided with a supporting bone position 24 for supporting the filter body 9.

With this mask 16, this special filter body 9 can be used. This filter has a simple structure and can be produced quickly. It can be mass produced in a short time. When using this filter, you must first put soft rubber in the surrounding bone 19 The ring boss 21 is put into the soft rubber ring 20, then the filter body 9, and then the soft rubber ring 20 is put in, and then the breathing hole plug 22 is pressed to press it, and the breathing hole plug 22 and the mask body pass through the breathing hole The threaded connection on the plug 22, so that the outside air can only pass through the filter body 9 and cannot pass through the gap between the filter body 9 and the mask body, because the soft rubber ring 20 is sealed. The surrounding bone 19 is also provided with a breathing hole plug bone position 23 for pressing the filter body 9.

Preferably, the filter body 9 may be square or circular, as shown in FIG. 11, FIG. 13, and FIG. 14.

Preferably, the mask body is provided with a strap hole 6 for installing a rope or elastic band on the head. Since the liquid bladder 5 must maintain a certain pressure when it is attached to the face, the rope or elastic band should be tighter, and the strap hole 6 should be wider, which is to prevent the head from being strangled.

Since the filter body 9 is a flat body, the production process of the product only has two processes of cutting and welding. There are no other processes such as installing aluminum strips and lanyards, which greatly improves the production capacity. At the same time, the material used for the filter body 9 is only existing A quarter of the mask greatly reduces the cost.

In a specific embodiment, the positioning hole 8, the suspension hole 10, and the fixing hole 17 can be replaced by an alternative structure, that is, a wire belt and a ferrule are used instead, and the ferrule can be sleeved on the positioning post or the fixing post 25. Or on the suspension column 3, its function is the same, as shown in Figure 16.

In a specific embodiment, the mask 16 can be made of hard material or cloth.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions and modifications to these embodiments still fall within the protection scope of the present invention.

Claims

A new type of filter, which is characterized by comprising a filter body, the edge of the filter body on the side contacting the bridge of the nose is provided with a hanging structure for hanging, and the middle of the filter body is an area for filtering breathing gas. The filter body is hung on the face frame or mask for pressing the filter body through a suspension structure, and the lanyard or elastic band of the face frame or the face mask is put on the head to realize the wearing of the filter body.
The filter according to claim 1, wherein the suspension structure of the filter body is a suspension hole.
The filter sheet according to claim 1, wherein the filter sheet body is a flat body.
The filter according to claim 3, wherein the filter body is a square flat body.
The filter sheet according to claim 2, wherein the filter sheet body is provided with two suspension holes.
The filter according to claim 5, wherein the two suspension holes are symmetrical about a plane passing through the middle of the filter body.
The filter according to claim 5, wherein the two suspension holes can be placed on both sides of the bridge of the nose.
The filter according to claim 2, wherein the filter body is provided with a non-planar symmetric structure to prevent the filter body from being inverted or reversed, and the non-planar symmetric structure includes the shape and suspension of the filter body. Any one or more of the five elements: the shape of the hole, the number of the hanging hole, the position of the hanging hole, and the size of the hanging hole.
The filter sheet according to claim 2, wherein the suspension holes are elongated.
The filter according to claim 1, wherein the filter body is provided with positioning structures on the left and right sides so as to center the filter body.
The filter according to claim 10, wherein the positioning structure of the filter body is a positioning hole.
The filter according to claim 1 or 5 or 6 or 7 or 8, wherein the edges of the filter body and the edges of the suspension holes are all welded connections.
The filter according to claim 11, wherein the edge of the filter body and the edge of the positioning hole are all welded connections.
The filter sheet according to claim 1, wherein the filter sheet body includes a bactericidal layer.
The filter sheet according to claim 1, wherein the filter sheet body includes a filter layer.
The filter according to claim 14 or 15, wherein the filter body further comprises an outer layer, a filter layer, a sterilization layer, and an inner layer, and the outer layer, the filter layer, the sterilization layer, and the inner layer are placed in sequence , The edges of the outer layer, the filter layer, the sterilization layer and the inner layer are welded together.
The filter sheet according to claim 1, wherein the filter sheet body is provided without a nose bridge.
The filter sheet according to claim 1, wherein the filter sheet body is provided without a lanyard.
A new type of filter sheet, which is characterized by comprising a filter sheet body, the filter sheet body is provided with a fixing structure for fixing the filter sheet body at the edge so as to prevent the whole or part of the filter sheet body from being displaced relative to the mask or face frame. A gap is created between the filter body and the mask, and the middle of the filter body is an area for filtering breathing gas.
The novel filter according to claim 19, wherein the fixing structure of the filter body is a fixing hole.
The novel filter according to claim 20, wherein the filter body is provided with a non-planar symmetric structure that prevents the filter body from being inverted or reversed, and the non-planar symmetric structure includes the shape of the filter body, Any one or more of the five elements: the shape of the fixed hole, the number of the fixed hole, the position of the fixed hole, and the size of the fixed hole.
The novel filter sheet according to claim 20, wherein the fixing holes are provided in two.
The novel filter sheet according to claim 20, wherein the number of the fixing holes is three.
The novel filter sheet according to claim 20, wherein the number of fixing holes is four.
The novel filter according to claim 20, wherein the number of fixing holes is five.
The novel filter according to claim 20, wherein the number of fixing holes is six.
The novel filter according to any one of claims 19, 20, 21, 22, 23, 24, 25, 26, wherein the fixing holes are arranged as round holes.
The novel filter sheet according to claim 19, wherein the filter sheet body is a circular filter sheet body or a square filter sheet body.
The novel filter according to claim 27, wherein the fixing holes of the circular filter body are evenly arranged on the edge of the circular flat body.
The novel filter according to claim 19, characterized in that the filter body is a centrally symmetrical plane body, and the edges of the filter body are provided with weld lines for welding the layers of the filter body together.
According to the novel filter according to any one of claims 19, 20, 21, 22, 23, 24, 25, 26, the edges of the fixing holes are all welded connections.
The filter sheet according to claim 19, wherein the filter sheet body includes a sterilization layer.
The filter sheet according to claim 19, wherein the filter sheet body comprises a filter layer.
The filter according to claim 32 or 33, wherein the filter body further comprises an outer layer, a filter layer, a sterilization layer, and an inner layer, and the outer layer, the filter layer, the sterilization layer, and the inner layer are placed in sequence , The edges of the outer layer, the filter layer, the sterilization layer and the inner layer are welded together.
The filter sheet according to claim 19, wherein the filter sheet body is provided without a nose bridge.
The filter sheet according to claim 19, wherein the filter sheet body is provided without a lanyard.