JP6889454B1 - Nostril cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem of a conventional mask. 1) Exhaled air and clean air were mixed in the mask, and carbon dioxide and water were sucked in at the same time, which made me suffocate. 2) The outside air entered and the virus and pollen could not be completely filtered. 3) It was unpleasant because the inside of the mask was moistened by exhalation, and germs propagated and it was unclean. 4) There was discomfort due to the smell inside the mask due to exhalation. 5) The glasses were cloudy and dangerous. SOLUTION: A nose hole cover is attached between a mask and a face, and the nose hole cover is fixed to a face contact portion which opens facing the face and a mask for fixing a mask which opens facing the mask. The face contact part is in close contact with the face and seals the nose hole and the area around the nose hole, and the mask fixing part is sealed by joining the mask with an adhesive or fixing it with an O ring and a mask fixing groove. A partial filter is formed by the above-mentioned method, and the inside of the nasal passage cover becomes a nasal breathing chamber where only nasal breathing is performed, and the inspiration and exhalation of the nasal passage are ventilated. [Selection diagram] Fig. 1

Description

The present invention relates to a nostril cover having a deodorizing function and a filtering function for preventing pollen, dust, viruses, bacteria and the like from entering the human body.

Masks are used to prevent pollen, dust, viruses, bacteria, fine particles, odors, etc. from entering the body. Since the virus is scattered by sneezing and coughing and floats in a closed space in an aerosol state for several hours, the conventional mask cannot completely block the virus due to the gap between it and the face. In addition, the exhaled breath discharged into the mask was unpleasant and stuffy due to a decrease in oxygen concentration, an increase in carbon dioxide concentration and water content, and a mixture of odors.

A nasal mask provided with a removable filter, an inspiratory check valve, and an expiratory check valve has been proposed in the public relations of No. 63-130063. In this method, the filtration capacity of the filter was small, the removal of suspended matter was insufficient, the ventilation resistance was large, and it was stuffy. In addition, there was a sense of discomfort when wearing it, and there was resistance when wearing it when going out.

In Japanese Patent Application Laid-Open No. 8-299478, a nostril cover is proposed in which an insertion tube for a nostril is provided in the main body of the box, a filter is provided on one side of the box, the other two sides are used as exhaust ports, and a check valve is provided. There is. In this method, the filter area was narrow and the ventilation resistance was large, which made it difficult to breathe. The structure was not such that the filter could be replaced, and it could not be used for a long time. There was a sense of discomfort when wearing it, and there was resistance when wearing it when going out.

Japanese Patent Application Laid-Open No. 3-191966 proposes a method of covering a nasal cannula with a concealing mask to supply a respiratory gas. In this method, 1) a respiratory gas supply device was required, and the portability was poor. 2) Since the inspiratory air is sucked from the cannula and the exhaled air is exhausted from the gap between the cannula and the nostril, a gap is always required between the cannula and the nostril, and there is a problem that the atmosphere invades through this gap.

Japanese Patent Application Laid-Open No. 2002-253689 proposes a mask with an exhaust valve provided with a flexible flap that acts as a check valve. In this method, the exhaled air in the mask is easily discharged by the exhaust valve. 1) Since the flap is opened and discharged after the exhaled air is filled in the mask, the inside of the mask is hot and humid with steam or hot air, and carbon dioxide is used during inspiration. I was suffocating because I inhaled residual exhaled breath containing a large amount of gas. 2) It was unpleasant because the inside of the mask smelled over time.

In the Korean Publication No. 10-2004-0107333 public relations, a nasal hole header equipped with an intake port, an exhalation port and a nasal hole nozzle is housed in a bag-shaped filter attached to a mask, and an intake check valve and an exhalation air are stored in the intake port. A mask has been proposed that has an exhalation check valve in the mouth to separate nasal and oral exhalation. In this method, 1) a bag-shaped filter is attached and a nostril header is inserted, so that a complicated process is required for attachment. 2) The nostril header and the bag-shaped filter are integrated and cannot be attached or detached. 3) The exhalation port is exposed to the outside of the bag-shaped filter, and the virus contained in the exhaled breath from the nose cannot be filtered, so that there is a problem that the infection spreads.

In the public relations of Korean Patent No. 10-2016-0018015, a nostril cover in which a check valve is attached to the nose cover is proposed. This check valve opens when inhaling to suck in the air inside the mask, and closes when exhaling to exhaust the outside air. For this reason, it was unpleasant because the odorous air in the mask was taken in.

Public Relations No. 63-130063 Japanese Patent Application Laid-Open No. 8-299478 Public Relations Japanese Patent Application Laid-Open No. 3-191966 Public Relations Japanese Patent Application Laid-Open No. 2002-253689 Public Relations of Korean Published Patent No. 10-2004-0107333 Public Relations of Korean Published Patent No. 10-2016-0018015

The US Occupational Safety and Health Administration has certified N95 masks. N95 is non-oil resistant and means that the collection efficiency of sodium chloride crystals of 0.3 μm or more is 95% or more. In Japan's national test, the DS2 class has the same effect as N95 in theory. The standard of the mask is the collection efficiency under certain conditions, and the problem is the fit between the mask and the face. In reality, it is difficult to provide a mask that fits everyone's face exactly. It is impossible to completely block microhazardous substances such as aerosols, pollen and PM2.5 that bypass and infiltrate from the periphery of the mask. Aerosols generated from sneezing and coughing are said to float in the air for 2 to 3 hours in a closed space, and are a source of virus infection.

In a conventional mask using cloth or felt, the exhaled air discharged by the exhalation movement fills the inside of the mask, the pressure inside the mask rises to the ventilation resistance of the mask, and then the air is discharged from the mask to the outside air. In the inhalation movement, the exhaled air filled in the mask is sucked, and then the static pressure in the mask is reduced to the ventilation resistance of the mask, and then the clean air from the outside air enters the mask. Therefore, it is unavoidable that the inspiratory air (clean air from the outside air) and the expiratory air (exhausted air from the nostrils) are once mixed in the mask. Maximum exhaustion of residual exhaled breath in the mask is important for comfortable breathing.

Exhaled air is expelled from the nose and mouth of the mask. Regarding the oxygen concentration, carbon dioxide concentration, and water vapor content, the contents of nasal and oral exhaled breath are the same. The oxygen concentration of exhaled breath is reduced to about 16 to 18% with respect to the oxygen concentration of 21% in the atmosphere. The carbon dioxide concentration rises from 0.01% to about 4%. The amount of water vapor is increased from 10 g / m3 to about 44 g / m3. For this reason, mask breathing was accompanied by suffocation and discomfort because hypoxia, high carbon dioxide, and high humidity continued. Due to the high humidity exhaled air due to the increase in the amount of water vapor, the glasses tend to become cloudy, which is dangerous because the forward visibility is reduced when driving a car, and the work efficiency is reduced when performing detailed work.

Mouth breath is painful because of its odor. The cause of bad breath is gas generated when proteins contained in mucous membranes, saliva, food, etc. are decomposed and fermented by bacteria, and typical ones are methyl mercaptan, hydrogen sulfide, dimethyl sulfide, and the like. These odors become stronger over time after brushing teeth. Each time you breathe through your mouth, you inhale these synthetic unpleasant odors, which is a cause of avoiding wearing a mask.

The present invention solves the problem of the mask, has excellent sealing property with the outside air, reliably filters viruses and dust, enables suction of clean fresh air at the same level as the atmosphere, and the mask. It is to reduce the odor inside and the cloudiness of the glasses. The solution is as follows. 1) Mouth breathing and nasal breathing are separated by partitioning the inside of the mask into a nasal breathing chamber and a mouth breathing chamber. 2) Reduce the degree of contamination by mixing clean inspiration and exhaled air in the mask, and reduce suffocation by inhaling clean air with a high oxygen concentration. 3) Prevent the humidity from rising due to exhalation and prevent the glasses from becoming cloudy. 4) Reduce the odor in the mask. 5) By covering the nostril cover with a mask, the discomfort in appearance is eliminated.

As shown in claim 1, the first solution is a nasal hole cover worn between a mask and a face, and the nasal hole cover has a face contact portion that opens facing the face and a mask. It consists of a mask fixing part for fixing a mask that is open facing the face, the face contact part is in close contact with the face and seals the nose hole and the area around the nose hole, and the mask is fixed to the mask fixing part. A partial filter is formed by being sealed, and the nasal canal cover is a nasal canal cover characterized by forming a nasal respiration chamber in which only nasal breathing is performed and allowing inspiration and exhalation of the nasal foramen to be ventilated.

As shown in claim 2, the second solution is a nasal hole cover worn between the mask and the face, and the nasal hole cover has a face contact portion that opens facing the face and a mask. It consists of a mask fixing part for fixing a mask that is open facing the face, the face contact part is in close contact with the face and seals the nose hole and the area around the nose hole, and the mask fixing part and the mask are fixed with an adhesive. A partial filter is formed by sealing the nasal passage, and the nasal passage cover is a nasal passage cover characterized by forming a nasal respiratory chamber in which only nasal breathing is performed and allowing inspiration and exhalation of the nasal passage to be ventilated.

As shown in claim 3, the third solution is a nasal hole cover worn between the mask and the face, and the nasal hole cover has a face contact portion that opens facing the face and a mask. It consists of a mask fixing part for fixing a mask that is open facing the face, the face contact part is in close contact with the face and seals the nose hole and the area around the nose hole, and the mask fixing part is provided with a mask fixing groove. By fixing and sealing the mask in the mask fixing groove with a fixing ring, a partial filter is formed, and the nasal hole cover forms a nasal breathing chamber where only nasal breathing is performed, and inhalation and exhalation of the nasal hole. It is a nasal canal cover characterized by ventilating.

As shown in claim 4, the fourth solution is a nostril cover characterized in that the face contact portion side and the mask fixing portion side of the nostril cover are separated and detached.

The effects of the first solution are as follows: 1) Since the space formed by the mask and the face is partitioned by the nasal cavity cover to form the nasal breathing chamber and the oral breathing chamber, the oral exhalation by mouth breathing and the nasal exhalation by nasal breathing are masked. You can breathe refreshingly without inhaling bad odor by nasal breathing without mixing inside. 2) Since the nasal breathing chamber is sealed by the face contact part of the nostril cover and the mask fixing part, it sucks in viruses, pollen, PM2.5 and other minute harmful substances that enter as aerosol through the gap between the mask and face. Never. 3) Since the volume of the nasal breathing chamber is narrowed, the nasal exhalation and clean air are quickly exchanged, and the amount of low-concentration oxygen, high-concentration carbon dioxide, and water vapor re-inhaled in the nasal exhalation is reduced, which makes breathing easier. 4) There is no discomfort because the mask material containing moisture does not come into contact with the face. 5) Since the water vapor from the nasal respiratory chamber is discharged from the partial filter surrounded by the mask fixing portion, the glasses are less likely to become cloudy. 6) A conventional mask can be used.

The effects of the second solution are as follows: 1) Since the mask and the mask fixing portion are fixed with an adhesive, the sealing property is excellent, and the outside air does not directly enter the nasal respiratory chamber. 2) By using double-sided tape, it is easy to join the mask fixing part and the mask. 3) Joining and peeling are easy by joining with soft silicon.

The effects of the third solution are as follows: 1) Since the mask is fixed by pushing it into the fixing groove of the mask fixing portion with an O-ring, it is easy to attach and detach. 2) Since the mask is pressed against the O-ring and the fixing groove, it has excellent sealing properties.

The effects of the fourth solution are as follows: 1) Since the face contact portion of the nostril cover needs to be in close contact with the face and sealed so that nasal breathing does not leak, a material having excellent flexibility is suitable. On the other hand, since the mask fixing portion tightens the mask with an O-ring, it needs to be rigid enough not to buckle. By separating the face contact portion side and the mask fixing portion side and making them removable, materials having different characteristics can be used in combination. 2) The mask fixing portion can be diverted when the size of the face contact portion is made different according to individual differences such as the wearer's age and gender.

Is a cross-sectional view of the face where the nostril cover and mask are sealed with a joint material. Is a cross-sectional view of the face where the nostril cover and mask are sealed with a fixing groove and an O-ring. Is a cross-sectional view of the face of the nostril cover of FIG. Is a cross-sectional view of the nostril cover and the face in which the fixing groove of FIG. 3 is rotated toward the mask. Is a perspective view of the nostril cover. Is a cross-sectional view taken along the line AA of the nostril cover of FIG. Is a cross-sectional view showing a structural example of the fixing groove of the mask fixing portion and the O-ring. Is a view B of the nostril cover of FIG. 5, which is a plan view of the nostril cover. Is a plan view in which the outer diameter of the mask fixing portion of the nostril cover in FIG. 8 is enlarged. Is a cross-sectional view of the nostril cover with the mask fixing part attached and detached. Is a cross-sectional view of the nostril cover with the end face of the mask fixing part cut out in an arc shape.

Embodiments of the present invention will be described with reference to claims 1 to 4 and FIGS. 1 to 11.

As shown in claim 1, the first solution is a nasal hole cover 20 worn between the mask 10 and the face, and the nasal hole cover 20 is a face contact portion that opens facing the face. 21 and a mask fixing portion 22 for fixing the mask 10 which is open facing the mask 10, and the face contact portion 21 is in close contact with the face to seal the nose hole and the periphery of the nose hole, and the mask is fixed. A partial filter 11 is formed by sealing and fixing the mask 10 to the portion 22, and the nasal hole cover 20 forms a nasal respiratory chamber 100 that only performs nasal breathing, so that the inhalation and exhalation of the nasal hole can be ventilated. It is a characteristic nose hole cover 20.

As shown in FIGS. 1, 2, 3 and 4, the nostril cover 20 is worn between the face and the mask 10. The face contact portion 21 is in close contact with the face to seal the face and the nostril cover 20. The mask fixing portion 22 is open facing the mask 10, and the mask 10 and the mask fixing portion 22 can be attached and sealed with the joining material 25 as shown in FIG. The joining material 25 includes double-sided tape and an adhesive. The nostril cover 20 is preferably an adhesive that can be easily peeled off for reuse. Silicone resin type, epoxy resin type, urethane resin type and the like can be used as the adhesive. Silicone resin is desirable for fixing masks because it retains its adhesive strength while maintaining its elasticity and has the property of being easily peeled off. As a bonding material that can be easily peeled off, about 5 silicon can be used with a JIS K 6253 compliant type A durometer.

In FIGS. 2, 3 and 4, a mask fixing groove 23 is formed by ribs 24, and the mask 10 is pressed against the mask fixing groove 23 by a fixing ring 30 to bring them into contact with each other to seal the mask 10 and the nostril cover 20. The mask 10 portion surrounded and sealed by the mask fixing portion 22 forms a partial filter 11 to filter the inspiration and exhalation of only the nasal respiration chamber 100.

The outside of the nostril cover 20 is the mouth breathing chamber 200, and the nasal breathing chamber 100 and the mouth breathing chamber 200 are completely separated. Therefore, nasal breathing is performed only in the nasal breathing chamber 100, and mouth breathing is performed only in the mouth breathing chamber 200. Since the exhaled breath of the nasal breathing and the mouth breathing are not mixed, the mouth odor is inhaled by the nasal breathing. You can breathe comfortably through your nose. Since the water vapor contained in the exhaled breath of the nasal breath is released from the partial filter 11 to the outside air, the glasses are less likely to become cloudy.

FIG. 8 is a view B in FIG. The face contact portion 21 of the nostril cover 20 is formed so as to match the shape of the face in order to precisely contact the face. Generally, the portion that contacts the nose muscle has a concave shape, and the portion that contacts the cheek has a convex shape. Since the human face varies greatly from person to person, it is desirable to soften the material of the face contact portion 21 and flexibly deform it into subtle irregularities in order to correspond to the greatest common divisor. As the material of the nostril cover 20, a resin such as silicon or urethane, which is harmless to the human body and has flexible deformation characteristics, is suitable. In particular, silicone is harmless to the human body and can be deformed according to the curved surface of the face, so that it has good sealing properties.

In the JIS K 6253 type A durometer, the silicon hardness of the face contact portion 21 is preferably 5 to 50. Further, the silicon hardness of the mask fixing portion 22 is preferably 30 to 80. If the hardness is 30 to 50, a common hardness can be selected for the face contact portion 21 and the mask fixing portion 22.

Further, the thickness of the face contact portion 21 and the mask fixing portion 22 can be changed to adjust the rigidity according to the respective characteristics. For example, the thickness of the face contact portion 21 can be reduced to fit the face softly, and the thickness of the mask fixing portion 22 can be increased to prevent buckling when fixing with the O-ring 31.

FIG. 10 is a cross-sectional view of the nostril cover 20 in which the face contact portion 21 side and the mask fixing portion 22 side of the nostril cover 20 are separated and detached. When the silicon hardness of the face contact portion 21 and the mask fixing portion 22 are different, it is advisable to manufacture each separately and make them removable.

The mask fixing portion 22 can fix the mask 10 with the fixing ring 30 to form a partial filter 11 for nasal breathing. The nasal respiration chamber 100 is sealed so that the exhaled air from the mouth respiration chamber 200 does not enter. As shown in FIGS. 4 and 5, the mask fixing portion 22 is provided with ribs 24 to form a fixing groove 23.

FIG. 7 is an enlarged view of part C in FIG. 6, showing an embodiment of a method of fixing a mask with a fixing ring 30. FIG. 7A shows an example in which the fixing ring 30 is an O-ring 31. The groove 23 is formed by being surrounded by ribs 24. The mask 10 is pushed into the fixing groove 23 by the O-ring 31 to fix it. As the O-ring 30, a rubber band made of natural rubber or a resin ring made of a flexible resin such as silicon or urethane can be used. Silicon is desirable because it is harmless to the human body and has a wide selection of hardness. The silicon mask fixing portion 22 and the O-ring 31 have elasticity, and when the mask 10 is tightened, they are elastic and therefore hard to come off. When the mask fixing portion 22 and the O-ring 31 are made of silicon, the mask 10 can be reliably fixed by utilizing the elasticity. Further, FIG. 7B is an example in which the rib 24 is bent inward of the fixing groove 23 to narrow it. By narrowing the frontage of the fixing groove 23, the O-ring 31 is less likely to come off. In FIG. 7C, by directing the fixing groove 23 in the direction facing the mask 10, the O-ring 31 can be easily inserted into the fixing groove 23, and the mask 10 can be easily fixed. In FIG. 7D, the grooved ring 32 provided with the fixing groove 23 and the mask 10 are sandwiched between the ribs 24 to facilitate fixing and improve the sealing property. Since the grooved ring 32 expands and contracts, it can be easily inserted into the rib 24.

FIG. 9 is a plan view of the nostril cover 20 in which the outer shape D2 of the mask fixing portion 22 is larger than the outer shape D1 of the face contact portion. The face contact portion 21 may cover the nostrils and their surroundings, and it is desirable that the outer diameter D1 is small from the viewpoint of sealing properties. Further, when the outer diameter D1 of the face contact portion 21 becomes large, it becomes closer to the lips, so that there is a problem that the sealing portion is lifted by the movement of the lips and the sealing property is deteriorated. Therefore, the size of the outer diameter D1 of the face contact portion 21 is limited. On the other hand, when the outer diameter D2 of the mask fixing portion 22 becomes large, the area of the partial mask 11 becomes large and the filtration area can be made large, so that the ventilation resistance becomes small and breathing becomes easy.

As shown in claim 2, the second solution is a nasal hole cover worn between the mask and the face, and the nasal hole cover has a face contact portion that opens facing the face and a mask. It consists of a mask fixing part for fixing a mask that is open facing the face, the face contact part is in close contact with the face and seals the nose hole and the area around the nose hole, and the mask fixing part and the mask are fixed with an adhesive. A partial filter is formed by sealing the nasal passage, and the nasal passage cover is a nasal passage cover characterized by forming a nasal respiratory chamber in which only nasal breathing is performed and allowing inspiration and exhalation of the nasal passage to be ventilated.

As shown in FIG. 1, the mask 10 and the mask fixing portion 22 can be attached and sealed with the joining material 25. The joining material 25 includes double-sided tape and an adhesive. The nostril cover 20 is preferably an adhesive that can be easily peeled off for reuse. Silicone resin type, epoxy resin type, urethane resin type, etc. can be used as the adhesive. Silicone resin is desirable for fixing masks because it retains its adhesive strength while maintaining its elasticity and has the property of being easily peeled off. As a bonding material that can be easily peeled off, about 5 silicon can be used with a JIS K 6253 compliant type A durometer.

As shown in claim 3, the third solution is a nasal hole cover 20 worn between the mask 10 and the face, and the nasal hole cover 20 is a face contact portion that opens facing the face. 21 and a mask fixing portion 22 for fixing the mask 10 which is open facing the mask 10, and the face contact portion 21 is in close contact with the face to seal the nose hole and the periphery of the nose hole, and the mask is fixed. A mask fixing groove 23 is provided in the portion 22, and a partial filter 11 is formed by fixing the mask 10 to the mask fixing groove 23 with a fixing ring 31 and sealing the mask 10, and the nasal hole cover 20 is used for nasal breathing. The nasal passage cover 20 is characterized in that it forms a nasal breathing chamber 100 that performs only the nasal passage, and ventilates the intake air and the exhaled air of the nasal passage.

In FIGS. 2, 3 and 4, a mask fixing groove 23 is formed by ribs 24, and the mask 10 is pressed against the mask fixing groove 23 by a fixing ring 30 to bring them into contact with each other to seal the mask 10 and the nostril cover 20. The mask 10 portion surrounded and sealed by the mask fixing portion 22 forms a partial filter 11 to filter the inspiration and exhalation of only the nasal respiration chamber 100.

FIG. 7 is an enlarged view of part C in FIG. 6, showing an embodiment of a method of fixing the mask 10 with the fixing ring 30. FIG. 7A shows an example in which the fixing ring 30 is an O-ring 31. The fixing groove 23 is formed by being surrounded by ribs 24. The mask 10 is pushed into the fixing groove 23 by the O-ring 31 to fix it. As the O-ring 30, a rubber band made of natural rubber or a resin ring made of a flexible resin such as silicon or urethane can be used. Silicon is desirable because it is harmless to the human body and has a wide selection of hardness. The silicon mask fixing portion 22 and the O-ring 31 have elasticity and are elastic when the mask 10 is tightened, so that they are easy to attach and hard to come off. When the mask fixing portion 22 and the O-ring 31 are made of silicon, the mask 10 can be reliably fixed by utilizing the elasticity. Further, FIG. 7B is an example in which the rib 24 is bent inward of the fixing groove 23 to narrow it. By narrowing the frontage of the fixing groove 23, the O-ring 31 is less likely to come off. In FIG. 7C, by directing the fixing groove 23 in the direction facing the mask 10, the O-ring 31 can be easily inserted into the fixing groove 23, and the mask 10 can be easily fixed. In FIG. 7D, the grooved ring 32 provided with the insertion groove 32a and the mask 10 are sandwiched between the ribs 24 to facilitate fixing and improve the sealing property. Since the grooved ring 32 expands and contracts, it can be easily inserted into the rib 24. FIG. 7E shows an example in which one rib 24 is slanted to form an L-shaped fixing groove.

The O-ring 31 can be used repeatedly. After the nostril cover 20 and the mask 10 are attached to the face and the nostril cover 20 and the mask 10 are positioned, the O-ring 31 is pushed into the fixing groove 23, so that the setting is easy. Since the nostril cover 20 is supported by the nose and the mask 10, it is securely fixed between the face and the mask 10 and does not fall.

As shown in claim 4, the fourth solution is a nostril cover 20 characterized in that the face contact portion 21 side and the mask fixing portion 22 side of the nostril cover 20 are separated and detached. Is.

FIG. 9 is a cross-sectional view of the nostril cover 20 in which the face contact portion 21 side and the mask fixing portion 22 side of the nostril cover 20 are separated and detached. When the silicon hardness of the face contact portion 21 and the mask fixing portion 22 are different, it is advisable to manufacture each separately and make them removable.

FIG. 11 is a cross-sectional view in which the end surface 22a of the mask fixing portion 22 is cut out in an arc shape. Since the end surface 22a of the mask fixing portion 22 protrudes from the mask 10 when it is attached, an appearance of discomfort occurs. Therefore, by cutting it in an arc shape, the protrusion is made smaller and the discomfort is eliminated.

10: Mask 11: Partial filter 20: Nostril cover 21: Face contact part 22: Mask fixing part 22a: End face 23: Fixing groove 24: Rib 25: Joining material 30: Fixing ring 31: O ring 32: Grooved ring 32a : Insertion groove 100: Nostril breathing chamber 200: Mouth breathing chamber D1: Outer shape of face contact part D2: Outer shape of mask fixing part

Claims (4)

A nasal hole cover that is worn between the mask and the face, and the nasal hole cover is a mask for fixing a face contact portion that opens facing the face and a mask that opens facing the mask. It is composed of a fixed portion, the face contact portion is in close contact with the face and seals the nose hole and the periphery of the nose hole, and a partial filter is formed by fixing and sealing the mask to the mask fixing portion. A nasal mask that forms a nasal breathing chamber that allows only nasal breathing and allows inspiration and exhalation of the nasal passage to be ventilated. A nasal hole cover that is worn between the mask and the face, and the nasal hole cover is a mask for fixing a face contact portion that opens facing the face and a mask that opens facing the mask. A partial filter is formed by sealing the nose hole and the periphery of the nose hole in close contact with the face, and fixing and sealing the mask fixing part and the mask with an adhesive. The nasal canal cover according to claim 1, wherein the cover forms a nasal respiration chamber in which only nasal breathing is performed, and inhales and exhales from the nasal foramen. A nasal hole cover that is worn between the mask and the face, and the nasal hole cover is a mask for fixing a face contact portion that opens facing the face and a mask that opens facing the mask. It is composed of a fixing portion, the face contact portion is in close contact with the face and seals the nose hole and the periphery of the nose hole, the mask fixing portion is provided with a mask fixing groove, and the mask is fixed to the mask fixing groove with a fixing ring. The nasal passage cover according to claim 1, wherein a partial filter is formed by fixing and sealing, and the nasal passage cover forms a nasal breathing chamber where only nasal breathing is performed, and inhalation and exhalation of the nasal passage are ventilated. .. The nostril cover according to claim 1 or 2, wherein the face contact portion side and the mask fixing portion side of the nostril cover are separated and detached.
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