CN1593690A - Dust-proof viruses-proof mask - Google Patents

Abstract

The invention discloses a dust-proof and anti-virus mask, which comprises a concave-shaped cover body and a lace. The lower part of the cover body is half-cup-shaped, and the upper part of the mask body corresponds to the tip of the nose on an arc-shaped base. The top also protrudes outward, forming a gap with the tip of the nose and the bridge of the nose, and the side is generally half pear-shaped. The above structure increases the gap between the tip of the nose, the bridge of the nose and the mask body, thereby reducing the gas flow velocity on the wall of the mask and improving the filtering effect of the mask; The exhaust structure is composed of grids and filter membranes. The filter membranes are partially connected to the forming grids and are in a relaxed state, which does not affect the filtering effect and can effectively solve the disadvantages of breathing and speaking. , and overcome the shortcoming that the exhaled gas passes through the gap at the bridge of the nose to fog the glasses, and has the advantages of lightness and comfort.

Description

A kind of anti-dust and anti-virus mask

technical field

The invention relates to a mask in the field of health care, in particular to a dust-proof and virus-proof mask.

Background technique

As we all know, there are three main ways for dust and viruses to enter the human body: respiratory tract, skin and digestive tract, among which the respiratory tract is the most important way. According to the statistics of the World Health Organization (WHO), with the development of modern industry, more than 2 million people worldwide die from chronic obstructive pulmonary disease (COPD, mainly caused by dust pollution) every year. Therefore, masks, as human health equipment, have been widely used in mine collection, cement manufacturing, chemical industry, medicine and health, powder metallurgy, sanitation and other industries with serious dust and pollution. In addition, the vast majority of infectious viruses (such as SARS virus) mainly spread through the dust attached to the air, so high-efficiency filter masks can prevent viruses from invading the human body through the respiratory tract in daily life.

Existing mask types mainly contain flat masks (point breathing), cup masks (cavity breathing) and the like. Early flat masks were mainly composed of several layers of gauze, so it was difficult to achieve real air filtration and felt stuffy. The cup masks that have been widely used in the market are integrally formed with microfibers to form a cup shape, wherein the upper and lower parts are basically symmetrical, and the sides are arc-shaped. Masks with this structure are improved compared to flat masks, but they still have the disadvantage of poor airflow distribution uniformity. Because the space under the nostrils is limited, it is easy to form a local high-speed airflow directly below it when breathing, and a large amount of dust and viruses in the air Under the action of high-speed airflow, it is easy to penetrate the mask and enter the human body, which greatly reduces the filtering effect of the mask.

In addition, when wearing this mask to breathe, the mask and the cheeks form a relatively closed cavity, and the moist gas exhaled from the body often overflows from the bridge of the nose, and it is easy to form fog in front of the eyes in winter. This has a strong impact on vision for people who wear transparent windshields or glasses, is extremely inconvenient, and even causes unsafe driving.

In the Chinese patent CN2421035, an anti-fog mask is disclosed, which is composed of a mask body, a filter part, and an exhaust part. Inhalation and exhaust are carried out independently in separate lanes. On the upper part, there is an exhaust groove from shallow to deep, and the insertion slot for the exhaust part and the ventilation slot for air outlet are formed, while the exhaust part is composed of upper and lower covers with vent holes and a one-way air-permeable film. composition. Though this mouth mask has certain anti-fog function, complex structure, and needs many attachments, thereby cost height, processing and manufacturing difficulty, weight is big, is not suitable for universal application.

Contents of the invention

In view of this, the main technical problem to be solved by the present invention is to provide a dust-proof and anti-virus mask with a simple structure, which can effectively improve the uniformity of the airflow distribution of the inlet and outlet masks and enhance the filtering effect of the mask.

In order to solve the above-mentioned technical problems, the present invention provides a dust-proof and anti-virus mask, which includes a concave-shaped cover body and a lace, the lower half of the cover body is half cup-shaped, and the upper half part corresponds to the nose tip The part protrudes outward on the basis of the arc shape, forming a gap with the tip of the nose and the bridge of the nose, and the side is generally half pear-shaped.

In the above solution, an exhaust structure can also be provided in the central area where the lower end of the cover is facing the air outlet direction of the nostrils. The exhaust structure includes an outer filter film and an inner forming grid. The above-mentioned forming meshes are connected and are in a relaxed state.

In the above solution, the exhaust structure is preferably oval or rectangular.

In the above solution, the distance between the inner surface of the mask and the tip of the nose in the horizontal direction is preferably 0.5-4 cm.

In the above solution, the cover body can be integrally formed, and the part in contact with the bridge of the nose is arched, and there is a thin layer for sealing inside the edge of the arched part.

As can be seen from the above, the dust-proof and anti-virus mask of the present invention increases the gap between the tip of the nose, the bridge of the nose and the cover body, so that the upper half of the cover body is far away from the nasal cavity, thereby increasing the effective filtering area of the cover body and reducing the gas on the mask wall surface. The flow speed makes the airflow in and out evenly distributed, and it is not easy to form local high-speed airflow, thereby improving the filtering effect of the mask.

In addition, the exhaust structure formed on the cover body of the present invention is composed of a forming grid and a filter film. When inhaling, the filter film is closely attached to the forming grid under the influence of air pressure to play a filtering role; when exhaling, The filter membrane is convex, and most of the air flows out from the part of the filter membrane that is not pasted. This simple structure does not affect the filtering effect, and at the same time, it can effectively solve the disadvantages of breathing and speaking, and overcome the pain of exhalation. The disadvantage of fogging the glasses due to the passage of gas through the gap at the bridge of the nose.

In addition, the mask of the present invention also has the advantages of simple shape, light weight, easy manufacture, and low cost, and is especially suitable for popular applications by the public.

Description of drawings

Fig. 1 is the front view of the anti-dust and anti-virus mask of the embodiment of the present invention;

Fig. 2 is the side sectional schematic diagram of the dust-proof anti-virus mask of the embodiment of the present invention;

Fig. 3 is the gas flow schematic diagram when using the dustproof antivirus mask of the embodiment of the present invention; And

Fig. 4A is a schematic side sectional view of the exhaust structure of the embodiment of the present invention; Fig. 4B is an exploded front view of the exhaust structure of the embodiment of the present invention;

Detailed ways

The nose is the place where the airflow is most concentrated when breathing. Therefore, when wearing a mask, it is easy to form a high-speed local airflow in and out on the wall of the mask below the nostril outlet direction. In this embodiment, a new shape is designed on the basis of fluid dynamics and physical structure for the shortcomings of the existing cup mask.

As shown in Figures 1 and 2, the dust-proof and anti-virus mask of this embodiment is composed of a cover body 1 and a lace 2. The cover body 1 is integrally formed by materials such as ultrafine fibers, has slight softness, and is generally curved. Concave, the part of the cover body in contact with the bridge of the nose is arched 11, and the inner side of the arched edge is pasted with a thin layer made of soft and comfortable foam material, so that the cover body 1 is in close contact with the bridge of the nose. The difference from the existing cup masks is that the upper part of the mask body is no longer arc-shaped along the nose tip, but on the basis of the arc shape, it also protrudes outward at the nose tip, so that the raised part 12 Keep a gap of 0.5-4 cm between the inner surface of the mask and the tip of the nose; the lower part of the mask is still in the shape of a half cup. This gives it a half-pear-shaped design on the sides. As shown in Figure 1, the front of present embodiment mouth mask has adopted heart-shaped design, but also can take other shapes, as ellipse. The edge of the mask body 1 roughly coincides with the curve of people's cheeks, so that the mask is close to the face of the human body.

It can be seen from the above that the upper part of the mask of this embodiment is expanded, and the position corresponding to the tip of the nose protrudes outward, so that the surface of the mask body is away from the nasal cavity, and the space of the cavity is increased. Please refer to Figure 3 at the same time. When breathing, the airflow can be inhaled from the upper part of the nose in addition to the cavity at the lower part of the nose. Therefore, the effective filtering area is increased, the air velocity on the wall of the mask is reduced, and the existing cup is overcome. The mask has the disadvantage of poor airflow uniformity at the tip of the nose, which in turn strengthens the filtering function of the mask. Therefore, the present invention and the invention can more effectively prevent dust and viruses under the same material.

In view of the characteristics of the flow field distribution of the mask in this embodiment, the flow field at the lower end of the expanded mask is evenly distributed and the gas velocity is low. Therefore, this embodiment also designs an exhaust structure 13 in the central area facing the nostrils at the lower end of the mask body, as shown in Figure 2, Figure 4A and Figure 4B, the shape of the exhaust structure 13 is preferably rectangular or oval , the inner side is a fine and flexible forming grid 131, such as polystyrene material, which is embedded in the cover layer; and the outer surface is made of a filter film 132 with good filtering effect, soft and durable, such as polytetrafluoroethylene Ethylene filter film replaces the original cover material. The filter film 132 is partially connected to the grid 131. For example, only a few points on the top, bottom, left and right sides or the periphery are pasted or sewn on the grid 131. The film 132 is not suitable for Paste tightly, there should be a little slack. In this way, when inhaling, the filter membrane 132 is closely attached to the grid under the influence of air pressure, thereby effectively filtering. When exhaling, the filter film 132 protrudes outwards, and most of the air flows out from the part where the film 132 is not pasted.

This simple physical structure is light and comfortable. It does not affect the filtering effect of the mask. At the same time, it can effectively solve the disadvantages of breathing and talking, and overcome the disadvantage of fogging the glasses when the exhaled gas passes through the gap at the bridge of the nose. .

On the position corresponding to the bridge of the nose, the cover body of the mask of the present invention can also be pasted with an inner lining strip made of soft, loose, and air-permeable organic synthetic material, which can be stuffed between the bridge of the nose and the cover body, which can increase comfort and strengthen Forming strength of the cover.

Claims (5)

1, a kind of dustproof anti-virus mouth mask comprises it is characterized in that the cover body and the frenulum of arc concave, the latter half of described cover body is half cup shape, its the first half corresponding to the position of nose on the basis of circular arc also to outer lug, and form the space between the nose bridge of the nose, the side totally is half pyriform.

2, mouth mask as claimed in claim 1, it is characterized in that, described cover body lower end also is provided with an exhaust structure in the central area of nostril outgassing direction, this exhaust structure comprises the filtration membrane and the inboard moulding grid in the outside, described filtration membrane is connected with described moulding grid local, and is in loose state.

3, mouth mask as claimed in claim 2 is characterized in that, described exhaust structure ovalize or rectangle.

4, mouth mask as claimed in claim 1 or 2 is characterized in that, described cover body inner surface is 0.5-4cm with the distance of nose in the horizontal direction.

5, mouth mask as claimed in claim 1 or 2 is characterized in that, described cover body is one-body molded, and its part that contacts with the bridge of the nose is arch, and there is a sealing thin layer inboard, edge of this arcuate part.

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