CN114916732A - Face mask - Google Patents

Abstract

The invention particularly relates to a low-cost mask with a low leakage rate. The mask body is covered with the flexible outer framework which is adaptive to the contour of the face of a human body, and the outer framework is used for applying pressure to enable the mask body to be more attached to the face, so that the sealing performance of the mask is improved. The leakage rate of the mask with the outer framework is lower than 1%. Because the outer framework is detachably connected with the mask body, the outer framework can be repeatedly used, and the mask cost is saved. Meanwhile, the outer framework provides support for the mask body, the mask has a three-dimensional structure, the ventilation area is larger than that of a conventional mask, and the ventilation resistance is reduced.

Description

Face mask

technical field

The invention specifically relates to a low-cost and low-leakage mask.

Background technique

Flat masks are widely used due to their simple production and low price. However, the flat mask does not fit well with the face and is easy to leak; even in the case of using a meltblown cloth with a filtration efficiency of more than 95%, the leakage rate is as high as 30% or more. Even for ordinary KN95 masks, the leakage rate after wearing is mostly around 10%, and the protection factor is around 10.

In order to improve the air tightness of the mask, CN1456370 discloses a mask with an inner frame and a face seal, the leakage rate of which can be reduced to less than 1%. However, this design increases the cost of masks and is not conducive to popularization. For general dust prevention and daily epidemic prevention, masks with low leakage rate and low cost are required.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a mask with low cost and low leakage rate.

The mask includes a mask body, an outer frame and a mask fixing part; the mask body and the outer frame both have a three-dimensional structure; the outer frame includes a ring-shaped contact part and a support part surrounded by the contact part; The contact part matches the shape of the face; the three-dimensional shape of the outer side of the mask body is compatible with the three-dimensional shape of the inner side of the outer skeleton; the mask body comprises a filter layer; the mask fixing part is used to The mask is fixed on the user's face, and the contact part of the outer frame is kept tightly covered on the outer side of the mask body, so that the inner side of the mask body and the user's face are tightly fitted.

The design principle of the present invention is to cover the mask body with a flexible outer skeleton adapted to the contour of the human face, and use the outer skeleton to exert pressure to make the mask body and the face fit better, thereby improving the tightness of the mask. The mask body has a three-dimensional structure and is compatible with the three-dimensional shape of the outer skeleton, and is connected to each other, and the outer skeleton provides support; the ventilation area of the mask's three-dimensional structure is larger than that of a flat mask, which reduces breathing resistance.

In one embodiment, the mask body and the outer skeleton are connected.

In one embodiment, the mask body and the outer frame are detachably connected.

In one embodiment, the filter layer comprises at least one layer of meltblown cloth.

In one embodiment, the mask body includes an outer non-woven fabric layer, a melt-blown fabric layer, and an inner non-woven fabric layer.

In one embodiment, the contact portion includes a nose bridge wing, and the nose bridge wing is arranged at a top center position of the contact portion and is adapted to the shape of a human nose.

In one embodiment, the outer skeleton is integrally formed.

In one embodiment, the outer skeleton is integrally formed from polyethylene or polypropylene.

In one embodiment, the shape of the exoskeleton is mussel-shaped or approximately hemispherical or boat-shaped.

In one embodiment, the mask fixing portion includes an elastic tightening strap.

In one embodiment, the strap is partially wrapped around the back of the user's ear or head when worn.

In one embodiment, the mask includes an adjustment buckle; the adjustment buckle is connected with the tightening strap; the adjustment buckle can adjust the length of the tightening strap.

In one embodiment, the mask fixing portion includes two tightening straps; the tightening straps are respectively connected to the left and right sides of the mask.

In one embodiment, the tightening strap is provided with a hook, and the hook can connect the two tightening straps behind the user's head.

Compared with the prior art, the present invention has obvious advantages and beneficial effects:

1) Strengthen the fit between the mask body and the face through the outer skeleton. Compared with ordinary KN95 masks, the leakage rate is lower and the protection factor is increased by more than ten times;

2) The outer skeleton provides support for the mask body, both of which have a three-dimensional structure, and the ventilation area is larger than that of conventional masks, which reduces the ventilation resistance and lowers the breathing resistance;

3) The mask body is detachable, and the outer skeleton can be repeatedly cleaned and disinfected, which reduces the cost of use.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

In order to illustrate the structural features and effects of the present invention more clearly, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be pointed out that the scales of the drawings may be different for the purpose of clear description, but this will not affect the understanding of the present invention. The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention.

Description of drawings

Fig. 1 is the frontal structural representation of the mouth mask of the first embodiment;

Fig. 2 is the exploded view of the mask of the first embodiment;

Fig. 3 is the front structure schematic diagram of the mouth mask of the second embodiment;

Fig. 4 is the side structure (excluding the mask fixing part) schematic diagram of the mouth mask of the second embodiment;

Fig. 5 is the side sectional view of the adjustment buckle of the second embodiment;

Fig. 6 is the frontal structural representation of the mouth mask of the third embodiment;

Attached identification:

1. External frame 2. Mask fixing part 3. Mask body

11. Contact part 111. Nose bridge 12. Support part

121, support bar 21, tightening belt 22, adjustment buckle

221, large hole 222, small hole 223, gap

224, welding block 23, hook 31, connecting piece

311. Welding end 312. Bonding end

Detailed ways

the term

In the description of the present invention, it should be noted that the terms are only for the convenience of describing the present invention and simplifying the description, and should not be construed as limiting the present invention.

As used herein, the term "face" is meant to include cheekbones, cheeks, chin, nose.

As used herein, the term "medial side" refers to the side facing the user's face when worn.

As used herein, the term "outer side" refers to the side that faces away from the user's face when worn.

As used herein, the term "top" is the area that corresponds to the upper end of the head when worn.

The present invention is further explained below in conjunction with specific embodiments, but the embodiments do not limit the present invention in any form.

The first embodiment of the present invention provides a mask. Figure 1 shows the frontal structure of the mask. The mask includes an outer frame 1 , a mask fixing part 2 and a mask body 3 . The outer frame 1 includes an annular contact portion 11 and a support portion 12 surrounded by the contact portion 11 . The support portion 12 includes a plurality of support bars 121, and the contact portion 11 forms a skeleton structure. The shape of the contact portion 11 matches the shape of the face. A nose bridge wing 111 is provided in the middle of the top of the contact portion 11 , and the nose bridge wing 111 is adapted to the shape of the human nose. The contact part 11 and the support part 12 are integrally injection-molded with polyethylene, and have certain flexibility.

The mask body 3 includes an outer non-woven fabric layer, a melt-blown fabric layer and an inner non-woven fabric layer, and the melt-blown fabric layer is in the middle of the outer non-woven fabric layer and the inner non-woven fabric layer. The filtration efficiency of the melt-blown cloth is 99.9% (the filtration efficiency of particles with a particle size of 0.3 microns or more in the air under an airflow of 8 L/min). The mask fixing part 2 includes a tightening strap 21 and an adjustment buckle 22 . The two adjustment buttons 22 in this embodiment are respectively arranged on the left and right sides of the mask body 3, are elongated, and are integrally formed with polypropylene. The adjustment button 22 is ultrasonically welded on the mask body 3 to form two circular welding blocks 224 ; except for the welding blocks 224 , other parts of the adjustment button 22 are separated from the mask body 3 . There are two slits 223 on the adjustment buckle 22 for adjusting and locking the tightening belt 21 . Only one section of the tightening belt 21 in FIGS. 1 and 2 is drawn for illustration only, and the tightening belt 21 is an elastic flat belt. There are two tightening straps 21 in this embodiment, one on the left and one on the right, suitable for ear-wearing or head-wearing; or one up and down, suitable for head-wearing.

Fig. 2 is an exploded view of the mask of the first embodiment. Figure 2 shows that the mask body 3 and the outer skeleton 1 both have a three-dimensional structure and are in the shape of a mussel. The three-dimensional shape of the outer side of the mask body 3 is similar to the three-dimensional shape of the inner side of the outer frame 1, but the mask body 3 has a larger area, and the edge of the mask body 3 all exceeds the edge part of the outer frame 1. The outer frame 1 and the mask body 3 are connected together by the adjustment buckle 22 . Although the length of the adjustment buckle 22 is greater than the distance between the corresponding two support bars, since the outer frame 1 is a flexible material, it can be deformed. As shown in FIG. 1 , part of the skeletons on both sides of the outer frame 1 can be clamped between the adjustment buckle 22 and the mask body 3 , and the adjustment buckle 22 plays the role of connecting the outer frame 1 and the mask body 3 . This design is convenient to disassemble the mask body 3, and the outer frame 1 can be used repeatedly after cleaning and disinfection, which reduces the use cost of the mask.

When wearing, the tightening belt 21 is worn behind the user's ears or behind the head. Under the contraction force of the tightening belt 21, the contact part 11 of the outer frame 1 is tightly covered on the outer side of the mask body 3, which will give the mask body 3 Pressure is applied to the corresponding position, so that the inner side of the mask body 3 closely fits the user's face.

Fig. 3 and Fig. 4 are respectively the front and side structure schematic diagram of the mask of the second embodiment. The mask includes an outer frame 1 , a mask fixing part 2 and a mask body 3 . The outer frame 1 is the same as the first embodiment. The mask body 3 is provided with four connecting pieces 31, which are made of non-woven fabric. One end of the connector 31 is ultrasonically welded to the mask body 3 to form a welded end 311 . The other end of the connecting piece 31 is the bonding end. The two connecting pieces 31 on the same side bypass a section of the contact portion of the outer frame 1 and a support bar, and are bonded together by double-sided tape to form a bonding block 312 . Four connecting pieces 31 fix the mask body 3 on the outer frame 1 . This design also facilitates disassembly of the mask body 3 .

The mask fixing portion 2 of the present embodiment includes two tightening straps 21 and four adjusting buckles 22, which are respectively arranged on the left and right sides of the mask. The tightening belt 21 is an elastic string, and the material is a composite of polyester and spandex, or a composite of nylon and spandex. The tightening belt 21 is connected with the outer frame 1 through the adjustment buckle 22 . There is a tightening belt 21 on each side of the outer frame 1 . FIG. 5 is a side sectional view of the adjustment buckle 22 of the second embodiment. The adjusting buckle 22 is elastic and deformable, and is a hollow round cake-shaped structure. One end of the hollow tube is a large hole 221 and the other end is a small hole 222 . The diameter of the small hole 222 is smaller than the diameter of the tightening belt 21 . In this embodiment, the two ends of each tightening strap 21 are respectively inserted into the small holes 222 of the two adjustment buckles 22, and passed through the large holes 221. Enter the large hole 221 of the adjustment buckle 22 and pass through the small hole 222, so that a knot is formed at the connection between the support part 12 and the contact part 11, and is fixed on the outer frame 1. The tightening belt 21 can also be directly knotted on the support portion 12 and fixed to the outer frame 1 . The length of the tightening belt 21 can be adjusted by adjusting the buckle 22 . The tightening belt 21 can be worn directly behind the ear or behind the head through the hook 23 .

Fig. 6 is the front structure schematic diagram of the mask of the third embodiment. The mask of this embodiment includes an adjustment button 22, and the adjustment button 22 and the outer frame 1 are directly welded or bonded together. The adjustment buckle 22 is another form of adjustment buckle that locks and adjusts the cinch strap 21 . The mask body 3 is provided with four connecting pieces 31, which are made of non-woven fabric. The connecting piece 31 is longer than the second embodiment, and the two connecting pieces 31 on the same side bypass a section of the contact portion of the outer frame 1 and the two support bars, and are bonded together by double-sided tape to form a bonding block 312 . Four connecting pieces 31 fix the mask body 3 on the outer frame 1 .

The filtration efficiency of the mask body 3 of the second embodiment and the third embodiment is the same as that of the first embodiment, which is 99.9% (the filtration efficiency of particles with a particle size of more than 0.3 microns in the air under the airflow of 8L/min).

Design the following mask tightness experiment to test the leakage rate when worn by a real person. The test method is: after the test experimenter wears the mask, measure the concentration of particles with a particle size of 0.3 microns or more in the cavity between the mask and the face and the concentration of particles with a particle size of 0.3 microns or more in the outside air. The ratio was taken as the leak rate. The protection factor, which measures the fit of the mask, is the reciprocal of the leak rate. The leakage rate of the mask of the first embodiment is 0.65%, the leakage rate of the mask of the second embodiment is 0.83%, and the leakage rate of the mask of the third embodiment is 0.71%. The masks of the above three embodiments have lower leakage rates than ordinary KN95 masks; since the outer skeleton can be reused, the adjustment buckles and the tightening straps of the second and third embodiments can be cleaned and reused, and the cost of use is relatively low.

The above descriptions are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the present invention. within the scope of the technical solution of the invention.

Claims (10)

1. a mouth mask, is characterized in that, described mouth mask comprises mouth mask body, outer skeleton and mouth mask fixing part; Described mouth mask body and described outer skeleton all have three-dimensional structure; Described outer skeleton comprises annular contact part and quilt. The support part surrounded by the contact part; the contact part matches the shape of the face; the three-dimensional shape of the outer side of the mask body is compatible with the three-dimensional shape of the inner side of the outer skeleton; the mask body contains a filter layer; the mask fixing part is used to fix the mask on the user's face, and the contact part of the outer skeleton is kept tightly covered on the outer side of the mask body, so that the inner side of the mask body is Fits closely to the user's face. 2. mouth mask according to claim 1, is characterized in that, described mouth mask body and described outer skeleton are connected. 3. The mask according to claim 2, wherein the mask body and the outer skeleton are detachably connected. 4. The mask according to claim 1, wherein the outer skeleton is integrally formed. 5. The mask according to claim 4, wherein the outer skeleton is integrally formed by polyethylene or polypropylene. 6 . The mask according to claim 1 , wherein the contact part comprises a nose bridge wing, and the nose bridge wing is arranged at a top center position of the contact part and is adapted to the shape of a human nose. 7 . 7 . The mask according to claim 1 , wherein the mask fixing portion comprises an elastic tightening strap. 8 . 8 . The mask according to claim 7 , wherein the mask fixing part comprises an adjustment buckle; the adjustment buckle is connected with the tightening strap; the adjustment buckle can adjust the length of the tightening strap. 9 . 9. The mask according to claim 1, wherein the filter layer comprises at least one layer of meltblown cloth layer. 10. The mask according to claim 9, wherein the mask body comprises an outer non-woven fabric layer, a melt-blown fabric layer and an inner non-woven fabric layer.

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