CN220024229U - Folding protective mask - Google Patents

Abstract

The utility model discloses a folding protective mask, which belongs to the technical field of masks and comprises a mask main body, wherein a longitudinal crease is formed in the middle of the mask main body so as to divide the mask main body into a left mask sheet and a right mask sheet which are identical in shape, an inverted triangle notch is formed in the middle of the upper end of the mask main body at the joint of the two mask sheets, and the two mask sheets are fixedly connected at the edges of the inverted triangle notch so as to splice the mask main body into a deformable three-dimensional space structure after being unfolded. The folding protective mask has good sealing effect, large three-dimensional cavity and can provide proper breathing space.

Description

Folding protective mask

Technical Field

The utility model relates to the technical field of masks, in particular to a folding protective mask.

Background

The mask is used as a respiratory protection article, which can form a relatively sealed space on the face of a human body and filter the air of a suction inlet nose. The existing protective mask at home and abroad at present can be roughly divided into the following categories:

the three-dimensional folding mask is common in the market, the mask can achieve a good protection effect, but when doing some specific actions, the mask is easy to cause air leakage at the nose bridge, the sealing effect is poor, so that the protection effect of the mask is weakened, a certain prevention and control risk is brought to a wearer, in addition, in winter, air leakage is easy to cause due to overlarge bending angle of the nose bridge, the protection hidden danger is brought, and glasses of the wearer of glasses are easy to fog.

Another type of protective mask is represented by a cup-shaped protective mask, which is a half pear-shaped mask fastened on the face, and the ear strap is fixed on the head through wearing. The protection effect of this type of gauze mask makes gauze mask cover body and face closely laminate through the mode of tightening the ear strap rope to reach the purpose of airtight, but when realizing the protection effect, because tightening too tightly, cause wearing uncomfortable for a long time.

The mask is characterized in that a three-dimensional structure is designed at the position of the mask surface at the mouth and nose, so that sufficient space is reserved between the mouth and nose and the mask for gas exchange, but the three-dimensional cavity of the commercially available mask is too large, so that the gas exchange is insufficient, a proper breathing space cannot be provided, and the mask has a stuffiness feeling under the condition of long wearing time.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a folding protective mask which has good sealing effect, large three-dimensional cavity and can provide a proper breathing space.

In order to solve the technical problems, the utility model provides the following technical scheme:

a folding protective mask comprising a mask body, wherein:

the middle of the mask body is provided with a longitudinal crease so as to divide the mask body into two mask sheets with the same shape, an inverted triangle notch is formed in the middle of the upper end of the mask body at the joint of the two mask sheets, and the two mask sheets are fixedly connected at the edge of the inverted triangle notch so as to splice the mask body into a deformable three-dimensional space structure after being unfolded.

Further, upper end both sides of gauze mask main part are connected with the regulation area, the lower extreme of gauze mask main part is equipped with the pipeline, wear to be equipped with in the pipeline and follow the lower regulation area that pipeline length direction removed forms adjustable string design.

Further, the gauze mask main part includes the mouth and nose corresponding with the person's of wearing mouth and nose, be equipped with in the mouth and nose and extend along the left and right directions and have the polymer aggregate of certain stiffness, wherein:

the upper edge and the lower edge of the polymer aggregate are straight lines extending along the transverse direction of the mask main body;

and/or the stiffness value of the polymer bone material along the transverse direction of the mask main body is 0.6mN-7.9mN;

and/or the stiffness value of the polymer bone material along the longitudinal direction of the mask main body is 0.4mN-6.6mN;

and/or the gram weight of the polymer aggregate is 30g/m ² -100g/m ² 。

Further, the gauze mask main part includes skin, filter layer and inlayer, the border of skin, filter layer and inlayer all bonds together through hot pressing, wherein:

the high polymer aggregate is arranged between the outer layer and the filter layer;

and/or the filter material in the filter layer is a nanofiber membrane.

Further, the outer edge of each mask piece comprises a first straight line section, a circular arc section and a second straight line section which are sequentially connected from top to bottom, and an included angle between the first straight line section and the horizontal direction in a folding state is 20-40 degrees.

Further, the inner edge of each mask piece comprises a third straight line section and a fourth straight line section which are sequentially connected from top to bottom, wherein:

after the foldable protective mask is worn, the included angle between the third straight line section and the vertical direction is 30-75 degrees;

and/or, the fourth straight line segment is parallel to the vertical direction, and the longitudinal crease is positioned at the fourth straight line segment.

Furthermore, the two mask sheets are of an integrated structure at the longitudinal crease, and are fixedly connected at the edges of the inverted triangle notch through hot pressing;

and/or the lower part of the mask body is provided with transverse folds to form a longitudinal folding layer.

Furthermore, the mask main body is transversely provided with a nose clip with plasticity at the nose bridge part of the human face;

and/or the inner side of the upper part of the mask body is provided with a sponge strip which extends from the left side edge to the right side edge and is used for being attached to the nose bridge position.

Further, two end parts of the upper adjusting belt are respectively and fixedly connected to two sides of the upper edge part of the outer surface of the mask main body, and fasteners are arranged on the upper adjusting belt and the lower adjusting belt;

or the upper adjusting belt and the lower adjusting belt are the same adjusting belt, and the two end parts of the adjusting belt are respectively and fixedly connected to the two sides of the upper edge part of the outer surface of the mask main body so as to form a first wearing section and a second wearing section on the two sides of the folding protective mask;

or the lower end edge of the mask body is folded upwards and then fixed with the mask body to form the pipeline.

Further, take the summit and the two bottom points of inverted triangle are first setpoint and second setpoint respectively, form two straightway between first setpoint and the second setpoint, these two straightway are two sides of inverted triangle, the contained angle between these two straightway is the apex angle of inverted triangle, wherein:

when the second positioning point is motionless and the first positioning point moves along the direction of the fourth straight line segment, the vertex angle of the inverted triangle is 35-103 degrees, and the side length of the inverted triangle is 35-92 mm;

or when the first positioning point is not moved and the second positioning point moves along the direction of the first straight line section, the vertex angle of the inverted triangle is 30-90 degrees, and the side length of the inverted triangle is 50-52 mm;

or when the first positioning point moves along the direction of the fourth straight line segment, the second positioning point moves along the direction of the first straight line segment, the vertex angle of the inverted triangle is 30-90 degrees, and the side length of the inverted triangle is 25-92 mm.

The utility model has the following beneficial effects:

the middle of the mask main body of the folding protective mask is provided with the longitudinal crease so as to divide the mask main body into the left mask piece and the right mask piece which have the same shape, so that the two mask pieces can form a transverse folding structure along the longitudinal crease, and the folding protective mask is convenient to store and form when leaving a factory; the upper end middle part of gauze mask main part is equipped with the breach of triangle-shaped in the junction of two gauze mask pieces, two gauze mask pieces are in triangle-shaped's breach edge fixed connection, in order to splice the gauze mask main part for the flexible three-dimensional space structure after expanding, when this folding protective mask of expansion wears, the gauze mask main part adaptation human face outwards rises like this and warp to the good three-dimensional space structure of adhesion, make gauze mask main part and oronasal department form a suitable breathing space, make the breathing pressure of oronasal department disperse other positions, thereby reduce respiratory resistance.

Drawings

Fig. 1 is a schematic overall structure of an embodiment 1 of a foldable protective mask according to the present utility model;

FIG. 2 is a schematic view of the structure of FIG. 1 after being folded along a longitudinal crease, wherein (a) is a perspective view and (b) is a cross-sectional view of (a);

FIG. 3 is a schematic diagram of a variation of FIG. 2 (a);

FIG. 4 is a schematic diagram of another variation of FIG. 2 (a);

fig. 5 is a schematic view illustrating a use state of the foldable protective mask shown in fig. 1;

fig. 6 is a schematic overall structure of embodiment 2 of the foldable protective mask of the present utility model;

fig. 7 is a schematic structural view of an accessory in the folding protective mask of the present utility model;

fig. 8 is a schematic plan view showing the mask body of the folding type protective mask of the present utility model when cut before production.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The utility model provides a folding protective mask, as shown in figures 1-8, comprising a mask body 1, wherein:

the middle of the mask body 1 is provided with a longitudinal crease 11 so as to divide the mask body 1 into two mask sheets with the same shape left and right, an inverted triangle notch 12 is arranged at the joint of the two mask sheets at the middle part of the upper end of the mask body 1, and the two mask sheets are fixedly connected at the edge of the inverted triangle notch 12 so as to splice the mask body 1 into a three-dimensional space structure which can be deformed after being unfolded.

The middle of the mask main body of the folding protective mask is provided with the longitudinal crease so as to divide the mask main body into the left mask piece and the right mask piece which have the same shape, so that the two mask pieces can form a transverse folding structure along the longitudinal crease, and the folding protective mask is convenient to store and form when leaving a factory; the upper end middle part of gauze mask main part is equipped with the breach of triangle-shaped in the junction of two gauze mask pieces, two gauze mask pieces are in triangle-shaped's breach edge fixed connection, in order to splice the gauze mask main part for the flexible three-dimensional space structure after expanding, when this folding protective mask of expansion wears, the gauze mask main part adaptation human face outwards rises like this and warp to the good three-dimensional space structure of adhesion, make gauze mask main part and oronasal department form a suitable breathing space, make the breathing pressure of oronasal department disperse other positions, thereby reduce respiratory resistance.

Further, two sides of the upper end of the mask main body 1 can be connected with an upper adjusting belt 13, the lower end of the mask main body 1 is provided with a pipeline 14, and a lower adjusting belt 15 capable of moving along the length direction of the pipeline 14 is penetrated in the pipeline 14 to form an adjustable rope drawing design; when this protective mask is worn to the user like this, pipeline atress shrink forms the living fold that has the adjustability, make the lower limit portion of gauze mask main part gather together the shrink, not only can compromise down the traditional function of adjusting the area, can also wrap up human mandibular masseter portion well in order to prevent gas leakage, under different demand environment, can be according to the use length of adjusting the area down and the relative position of adjusting area and pipeline down, change protective mask's protective effect, improve gauze mask to the parcel effect of wearer, not only enlarged the application scope of gauze mask, also improved the flexibility that the gauze mask was worn simultaneously. The duct 14 may be formed in various manners, for example, the duct 14 is formed by folding up the lower end edge of the mask body 1 and fixing it to the mask body 1, and for example, the duct 14 is formed by enclosing the inner layer and the outer layer of the mask body 1. The duct 14 may be formed by heat-sealing a nonwoven fabric, or may be formed by bonding or sewing, which is not limited in the present utility model.

The lower adjusting belt in this embodiment can follow the length direction removal of pipeline 14, the relative position between lower adjusting belt and the pipeline 14 can be adjusted to the person of wearing, thereby make things convenient for the person of wearing to adjust mask main part 1 to suitable angle, the protection effect of protection mask has been improved and it is convenient to adjust, and when the person of wearing protection mask, the lower limit portion of mask main part 1 gathers together the shrink to the center owing to the tensile of lower adjusting belt, can be to the better parcel fit of user's mandible, thereby mask main part 1 can realize self-adaptation fit parcel when the mandible moves, further improved protection mask's protection security performance, and still can reduce the number of times of adjusting mask main part 1 with both hands, the chance of touching mask main part 1 has been reduced in order to reduce the probability of infection.

As shown in fig. 1-2, the lower portion of the mask body 1 may be provided with transverse folds (i.e., transverse creases) to form a longitudinal fold layer 16, in which case the mask body 1 includes three parts in order from top to bottom (see fig. 5): the mask body 1 is unfolded to form a cavity structure which is different in upper structure and lower structure and is mutually complemented, a distance is reserved between the mask body 1 and the mouth and the nose of a wearer, direct contact between the mouth and the nose of the wearer and the mask body 1 can be avoided, and a more proper breathing space is provided.

When the face of a human body performs certain specific movements, the transverse folding of the upper edge part of the mask main body 1 keeps static stability, a stable cavity for breathing is provided, the lower adjusting belt 15 is tightened at the neck part, so that the lower edge of the mask main body 1 is ensured to be attached to the mandible part of the human body, at the moment, the mask main body 1 is influenced by the movements, the longitudinal folding layer 16 at the lower part of the mask main body 1 can be in a dynamic unfolding state according to the movements of bones and muscles of the face of the human body, an unfolding surface which is suitable for the movements of the muscles of the face of the human body and the opening and closing states of the mouth is formed, the dead cavity volume of the mask main body 1 is changed, the dead cavity volume of the mask main body 1 can be reduced, or the increased airflow resistance is generated due to the fact that the cavity is too small, and the comfort of the protective mask is improved; in the wearing process, the cavity structure of the protective mask can realize flexible dynamic and static combination, provides better comfort and higher sealing performance for a wearer in the dynamic movement process, accords with human engineering, and has higher flexibility and better protective performance.

As shown in fig. 1-2, the mask body 1 may include a nose-mouth portion 17 corresponding to the nose-mouth portion of the wearer, and a polymer bone material (which may be a rectangular sheet in particular) 18 having a certain stiffness and extending in the left-right direction of the mask body 1 is disposed in the nose-mouth portion 17, and since the polymer bone material 18 has a certain stiffness/toughness, the polymer bone material 18 may be bent into a predetermined shape according to the actual use requirement of the user, and plays a good three-dimensional supporting role on the whole protective mask, so as to improve the cavity stability of the protective mask, and the cavity structure is not damaged due to respiration and mild collision, so that the comfort of the protective mask in the long-time wearing process is ensured, and the use effect of the protective mask is good.

The supporting function of the polymer bone material 18 comes from the fact that the polymer bone material has certain hardness, the face shape of a wearer cannot be perfectly attached, a certain distance is reserved between the mask main body 1 and the face of the wearer, meanwhile, the mask can be kept in the breathing process, the polymer bone material 18 is like an arched girder erected between two cheeks of the wearer when the mask is worn, and the supporting effect of the polymer bone material 18 cannot be damaged when the mask is folded and unfolded. When a user wears the protective mask, the mask main body 1 is pulled by the upper and lower adjusting belts, and the polymer bone material 18 with certain stiffness is bent under the traction of the upper and lower adjusting belts under stress to generate bending moment and deform to arch outwards, so that the mouth and nose 17 of the mask main body 1 is unfolded along the face curve of the wearer to bulge outwards, a stable 3D space structure adapting to the face of the wearer is formed, and the mask main body 1 forms a larger surrounding space within the face preset range, thereby providing a place for gas exchange for the mouth and nose of the wearer.

In the present utility model, the polymer bone material 18 is preferably in the area of the preset area around the face of the wearer, and the upper edge and the lower edge of the polymer bone material 18 may be straight lines extending along the lateral direction of the mask body 1, that is, the length direction of the upper edge of the polymer bone material 18 is parallel to the lateral direction of the mask body 1, and is preferably located at the upper portion of the circular arc section 20 and overlapped with the lower end portion of the hot pressing line 24, so that the length direction of the lower edge of the polymer bone material 18 is parallel to the lateral direction of the mask body 1, and the wearing effect and the three-dimensional supporting performance of the protective mask may be better. Further, the lateral fold at the lower part of the mask body 1 can be divided into an inner layer and an outer layer, so that when the wearer wears the protective mask, the lateral fold is unfolded, a certain gas exchange space is reserved for the mouth and nose of the wearer, and the polymer bone material 18 is changed into an unfolded state from a folded state, so that the protective mask forms a more three-dimensional supporting space, and smoothness of breathing of the wearer is improved.

The stiffness value of the polymer bone material 18 along the transverse direction of the mask main body 1 is preferably 0.6mN-7.9mN; the stiffness value of the polymer bone material 18 along the longitudinal direction of the mask main body 1 is preferably 0.4mN-6.6mN, so that when the protective mask is worn by a wearer, the polymer bone material 18 positioned in the stiffness value range is stressed to generate bending moments of different degrees, and a proper cavity size is generated at the mouth and nose of the wearer. The polymer aggregate 18 can be formed by braiding fibers, the overall fiber trend can be the same, the fiber trend is mainly in the transverse direction, the stiffness value of the polymer aggregate 18 is in direct proportion to the gram weight, and the gram weight of the polymer aggregate 18 is preferably 30g/m ² -100g/m ² 。

As shown in fig. 2 (b), the mask body 1 may include an outer layer, a filter layer, and an inner layer, edges of which are bonded together by hot pressing; the filter material in the filter layer is preferably a nanofiber membrane to improve the filtering effect of the protective mask. In this case, the polymer bone material 18 may be disposed between the outer layer and the filter layer.

As shown in fig. 2, the outer edge of each mask sheet may include a first straight line segment 19, an arc segment 20, and a second straight line segment 21 sequentially connected from top to bottom, and an included angle α1 between the first straight line segment 19 and the horizontal direction in a folded state (when not worn/folded and not unfolded) may be 20 ° -40 °, for example, 25 °, 32 °, 38 °, etc., so as to improve the wearing effect of the folding protective mask.

According to the difference of the included angle alpha 2 between the second straight line segment 21 and the lower edge of the mask sheet, the utility model can have the following structural forms:

structural form one: as shown in fig. 2, the included angle α2 between the second straight line segment 21 and the lower edge of the mask sheet may be greater than 90 degrees (obtuse angle);

and the structural form II is as follows: as shown in fig. 3, the included angle α2 between the second straight line segment 21 and the lower edge of the mask sheet may be equal to 90 degrees (right angle);

and the structural form III: as shown in fig. 4, the angle α2 between the second straight line segment 21 and the lower edge of the mask sheet may be smaller than 90 degrees (acute angle).

Further, the inner edge of each mask sheet may include a third straight line segment 22 and a fourth straight line segment 23 sequentially connected from top to bottom. After the folding protective mask is worn, an included angle γ (see fig. 5) between the third straight line segment 22 and the vertical direction may be 30 ° -75 °, for example, 40 °, 50 °, 70 °, etc., so as to improve the wearing effect of the folding protective mask. The fourth straight section 23 is preferably parallel to the vertical direction, the longitudinal crease 11 being located at the fourth straight section 23.

The two mask sheets are preferably of an integral structure at the longitudinal crease 11, and are fixedly connected at the edge of the inverted triangle notch 12 through hot pressing (at this time, the third straight line segment 22 forms a hot pressing line 24), compared with other protective masks forming cavities, the air permeability of the protective mask can be changed through die pressing, the two mask sheets are cut out from raw materials in a double-splicing mode, and then the two mask sheets are spliced.

The mask body 1 can be transversely provided with the nose clip 25 with plasticity at the nose bridge position of the human face, so that when a wearer wears the protective mask, the upper edge of the mask body 1 can be attached to the nose bridge position of the human face and the face by pressing the nose clip 25, and the protective performance of the mask is better. The upper portion inboard of gauze mask main part 1 can be equipped with and extends to the sponge strip 26 that the right side is used for laminating with the bridge of the nose position from the left side, and like this when wearing protective mask is worn to the person's face bridge of the nose position laminating to sponge strip 26, can reduce the nose and press from both sides 25 to the pressure of bridge of the nose, improves the comfort level when wearing of person, can also strengthen the inboard laminating degree with the face of protective mask simultaneously, strengthen protective mask's leakproofness. The sponge strip 26 and the nose clip 25 are preferably connected to the cover 1 by an adhesive layer.

Depending on the manner in which the upper adjustment strap 13 and the lower adjustment strap 15 are secured, the present utility model may have the following embodiments:

example 1

As shown in fig. 1-5, two end parts of the upper adjusting belt 13 can be respectively and fixedly connected to two sides of the upper edge part of the outer surface (outer layer) of the mask main body 1, the upper adjusting belt 13 and the lower adjusting belt 15 are respectively provided with a fastener 27, when the upper adjusting belt 13 and the lower adjusting belt 15 on the wearer cannot meet the requirement of the sealing degree of the protective mask, the wearer can change the length of the adjusting belt by adjusting the positions of the fasteners 27, so that the wearing requirements of different wearers are realized, the wearing comfort is improved, the facial sealing degree is good, the smooth breathing is ensured, and meanwhile, the better sealing effect is kept, so that the use effect of daily protection or medical protection is achieved; and by loosening the fastener 27 on the lower adjustment strap 15, the lower part of the mask body 1 can be in an open state, and drinking water can be taken while covering the nose of the wearer.

Example 2

As shown in fig. 6 to 7, the upper adjusting strap 13 and the lower adjusting strap 15 may be the same adjusting strap (may be specifically annular), and two ends of the adjusting strap are respectively and fixedly connected to two sides of an upper edge portion of an outer surface (outer layer) of the mask body 1, so that a first wearing section 28 and a second wearing section 29 are formed on two sides of the foldable protective mask, so that the foldable protective mask is relatively convenient to manufacture, has relatively high connection strength, is not easy to break, and can move along the pipeline 14, so that the lengths of the first wearing section 28 and the second wearing section 29 are conveniently adjusted.

When the wearer wears the protective mask, the first wearing section 28 and the second wearing section 29 can be respectively hung on the left ear and the right ear of the wearer, and the wearer can adjust the relative positions of the adjusting belts and the pipeline 14 to extend or shorten the use lengths of the first wearing section 28 and the second wearing section 29, so that the protective mask is adjusted to a proper wearing position, the protective effect of the mask is improved, and the adjustment is convenient.

Further, as shown in fig. 7, the foldable protective mask may further include a fitting 3, where the fitting 3 is detachably connected with the first wearing section 28 and the second wearing section 29, and a pair of hooks are disposed at two ends of the fitting 3 along a length direction of the fitting, and if the first wearing section 28 and the second wearing section 29 are worn by a wearer, the requirement of the tightness of the protective mask cannot be met (the requirement is mainly a personal reason of the wearer, such as a small face, etc.), the first wearing section 28 and the second wearing section 29 may be fastened and fixed by the pair of hooks of the fitting 3 at a rear end of the head, so as to achieve a use effect of daily protection or medical protection. One of the hooks may be an open hook 31 and the other hook is a closed hook 32, and the closed hook 32 is provided with a wearing section mounting notch 33 to facilitate tightening and fixing the first wearing section 28 and the second wearing section 29. The openings of a pair of hooks are preferably facing opposite directions.

The folding protective mask of the utility model needs to be expanded in the wearing process, so that the angle gamma between the hot-pressing line 24 and the vertical direction is changed, namely the cavity of the mask is enlarged, the hot-pressing line 24 moves downwards, and the angle gamma is used as the protective mask which is difficult to manufacture in the required size specification before production. In order to solve the problem, the utility model adopts the size of the inverted triangle notch 12 in the middle of the upper end of the mask main body 1 before production, thereby manufacturing the protective mask with the required size specification, and the specific implementation modes are as follows:

as shown in fig. 8, the vertex and two bottom points of the inverted triangle are respectively a first positioning point a and a second positioning point B, two straight line segments are formed between the first positioning point a and the second positioning point B, the two straight line segments are two sides of the inverted triangle (i.e., the third straight line segment 22/the hot-pressing line 24), and an included angle β between the two straight line segments (i.e., an included angle between the two mask sheets) is the vertex angle of the inverted triangle. According to the different states of the first positioning point a and the second positioning point B (in the figure, the M direction is the moving direction of the second positioning point B, and the N direction is the moving direction of the first positioning point a), the vertex angle β and the side length L (i.e. the length of the thermo-compression line 24) of the inverted triangle in this embodiment may have the following structural forms:

(a) The method comprises the following steps When the second positioning point B is motionless and the first positioning point A moves along the direction of the fourth straight line segment 23, the vertex angle beta of the inverted triangle can be 35-103 degrees, and the side length L of the inverted triangle can be 35-92 mm;

(b) The method comprises the following steps When the first positioning point A is motionless and the second positioning point B moves along the direction of the first straight line section 19, the vertex angle beta of the inverted triangle can be 30-90 degrees, and the side length L of the inverted triangle can be 50-52 mm;

(c) The method comprises the following steps When the first positioning point A moves along the direction of the fourth straight line segment 23 and the second positioning point B moves along the direction of the first straight line segment 19, the vertex angle beta of the inverted triangle can be 30-90 degrees, and the side length L of the inverted triangle can be 25-92 mm.

The included angle β between the two side mask sheets and the length L of the hot-pressed line 24 in this embodiment can be adjusted according to the needs of different wearers (specifically, the mask can be divided into three types of "large", "medium" and "small") so as to satisfy the protection needs of different people. At this time, the angle γ (see fig. 5) between the third straight line segment 22 (i.e. the hot pressing line 24) and the vertical direction is changed according to the nose shape of the wearer, the length L of the hot pressing line 24, and the angle β between the two mask sheets, and the angle γ may be 30 ° -75 °.

The performance of the folding protective mask is tested by firstly selecting 6 samples, 3 samples are pretreated, 3 untreated samples, and the particle size distribution of sodium chloride aerosol is that the median diameter of the particle number is in0.075 μm.+ -. 0.02 μm, concentration not exceeding 200mg/m ³ The filter efficiency and the ventilation resistance of the protective mask of the embodiment are tested under the test condition that the gas flow is 85L/min+/-2L/min, and the final test results all meet the requirements of GB19083-2010 medical protective mask standards.

And the folding protective mask disclosed by the utility model is subjected to sealing performance test, 10 subjects are selected, the mask is worn according to the use specification by using a sealing tester, 6 specified actions are performed, the total fit factor is finally obtained, the total fit factors of the 10 subjects all meet the requirements, and the sealing test results all meet the requirements of GB19083-2010 medical protective mask standards.

In summary, friction is generated between the lower adjusting belt and the pipeline in the folding protective mask, the lower adjusting belt and the pipeline can be relatively adjusted and contracted in a stretching mode along the length direction, so that the lower edge of the mask main body is better wrapped and sealed on the lower jaw bone and facial muscles of a wearer, the lower portion of the mask main body is provided with transverse folds to form a longitudinal folding layer at the position connected with a high polymer bone material, the space below the mask main body is further enlarged, the cavity space of the protective mask is increased, different degrees of unfolding surfaces can be generated according to the face difference of different wearers, the dead cavity volume adapting to breathing requirements is formed, the inclusion of the protective mask on the wearers is improved, in the wearing process, the dead cavity volume of the protective mask can be adjusted according to the face shape of the wearers and the pressure (breathing resistance) brought by breathing of the wearers, meanwhile, the longitudinal folding layer does not have the high polymer bone material, the flexibility of the lower portion of the mask main body is improved to a certain extent, the wrapping performance of the protective mask on the lower jaw and the biting muscles of the face of the human is enhanced, and the functionality of the mask in the face and the movement process is guaranteed.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. The utility model provides a foldable protective mask which characterized in that, includes the gauze mask main part, wherein:

the middle of the mask body is provided with a longitudinal crease so as to divide the mask body into two mask sheets with the same shape, an inverted triangle notch is formed in the middle of the upper end of the mask body at the joint of the two mask sheets, and the two mask sheets are fixedly connected at the edge of the inverted triangle notch so as to splice the mask body into a deformable three-dimensional space structure after being unfolded.

2. The foldable protective mask according to claim 1, wherein two sides of the upper end of the mask body are connected with upper adjusting belts, a pipeline is arranged at the lower end of the mask body, and a lower adjusting belt capable of moving along the length direction of the pipeline is arranged in the pipeline in a penetrating manner, so that an adjustable rope drawing design is formed.

3. The foldable protective mask according to claim 1, wherein the mask body comprises an oronasal portion corresponding to an oronasal portion of a wearer, wherein a polymeric bone material extending in a left-right direction and having a certain stiffness is provided in the oronasal portion, and wherein:

the upper edge and the lower edge of the polymer aggregate are straight lines extending along the transverse direction of the mask main body;

and/or the stiffness value of the polymer bone material along the transverse direction of the mask main body is 0.6mN-7.9mN;

and/or the stiffness value of the polymer bone material along the longitudinal direction of the mask main body is 0.4mN-6.6mN;

and/or the gram weight of the polymer aggregate is 30g/m ² -100g/m ² 。

4. A foldable protective mask according to claim 3 wherein the mask body comprises an outer layer, a filter layer and an inner layer, edges of the outer layer, filter layer and inner layer being bonded together by heat pressing, wherein:

the high polymer aggregate is arranged between the outer layer and the filter layer;

and/or the filter material in the filter layer is a nanofiber membrane.

5. The foldable protective mask of claim 1, wherein the outer edge of each mask sheet comprises a first straight line segment, a circular arc segment and a second straight line segment connected in sequence from top to bottom, and the angle between the first straight line segment and the horizontal direction in the folded state is 20 ° -40 °.

6. The foldable protective mask of claim 5, wherein the inner edge of each mask sheet comprises a third straight line segment and a fourth straight line segment connected in sequence from top to bottom, wherein:

after the foldable protective mask is worn, the included angle between the third straight line section and the vertical direction is 30-75 degrees;

and/or, the fourth straight line segment is parallel to the vertical direction, and the longitudinal crease is positioned at the fourth straight line segment.

7. The foldable protective mask according to claim 1, wherein two of the mask sheets are integrally structured at the longitudinal fold, and fixedly connected at the notch edge of the inverted triangle by heat pressing;

and/or the lower part of the mask body is provided with transverse folds to form a longitudinal folding layer.

8. The foldable protective mask according to claim 1, wherein the mask body is provided with a nose clip having plasticity in a lateral direction at a nose bridge portion of a human face;

and/or the inner side of the upper part of the mask body is provided with a sponge strip which extends from the left side edge to the right side edge and is used for being attached to the nose bridge position.

9. The foldable protective mask according to claim 2, wherein two end portions of the upper adjusting strap are fixedly connected to two sides of an upper edge portion of an outer surface of the mask body, and fasteners are arranged on the upper adjusting strap and the lower adjusting strap;

or the upper adjusting belt and the lower adjusting belt are the same adjusting belt, and the two end parts of the adjusting belt are respectively and fixedly connected to the two sides of the upper edge part of the outer surface of the mask main body so as to form a first wearing section and a second wearing section on the two sides of the folding protective mask;

or the lower end edge of the mask body is folded upwards and then fixed with the mask body to form the pipeline.

10. The foldable protective mask of claim 6, wherein the vertex and the two bottom points of the inverted triangle are respectively a first positioning point and a second positioning point, two straight line segments are formed between the first positioning point and the second positioning point, the two straight line segments are two sides of the inverted triangle, an included angle between the two straight line segments is a vertex angle of the inverted triangle, and wherein:

when the second positioning point is motionless and the first positioning point moves along the direction of the fourth straight line segment, the vertex angle of the inverted triangle is 35-103 degrees, and the side length of the inverted triangle is 35-92 mm;

or when the first positioning point is not moved and the second positioning point moves along the direction of the first straight line section, the vertex angle of the inverted triangle is 30-90 degrees, and the side length of the inverted triangle is 50-52 mm;

or when the first positioning point moves along the direction of the fourth straight line segment, the second positioning point moves along the direction of the first straight line segment, the vertex angle of the inverted triangle is 30-90 degrees, and the side length of the inverted triangle is 25-92 mm.