TW201318665A - Foldable 3D mask - Google Patents

Abstract

The present invention provides a foldable 3D mask, including a mask body and at least a fixing band. The mask body has an upper part, a lower part and a central part between the upper part and the lower part. The central part has a central region, an upper invagination area between the central region and the upper part or a lower invagination area between the central region and the lower part. Through design of the upper invagination area or the lower invagination area, the mask body will avoid being dragged down by the chin and the central region will not deform easily when a wearer's mouth makes a broadly opening or closing action, thus preventing the foldable mask from the generation of a problem of worse fitting with the wearer's face, reducing the leak rate in order to obtain a high protection efficiency.

Description

Folding three-dimensional mask

A three-dimensional mask, especially a folded three-dimensional mask.

Micro-filter masks have been widely used in a variety of applications to protect the health of the user's respiratory system. In general, micro-filter masks are mainly available in two types: cup or fold, and the folding type has the advantage of being conveniently stored in the user's In the pocket, the mask needs to be unfolded until it is used. In addition to the convenience of carrying, the edge of the folding mask is not like the shape of the cup mask, so it can be better matched with the user's face when worn. Cohesion.

With the improvement of the filter cloth technology, the filter effect of the mask can now achieve extremely high protection effect. According to the NIOSH certified standard of the United States, the filtration effect grades are 95%, 99% and 99.97%, respectively, even if filtering How high is the effect? If the mask itself does not provide a good facial adhesion, the contaminants will be inhaled by the user through the gap between the mask and the face. Therefore, the fit of the mask face is just as important as the filtering effect. factor.

U.S. Patent No. 6,123,077 to U.S. Patent No. 6,123,077, the entire disclosure of which is incorporated herein by reference to the entire entire entire entire entire entire entire entire entire entire entire entire content The upper and lower non-woven fabrics of the mask cover the nose and the chin respectively to maintain a good adhesion to the face. Referring to FIG. 9 and FIG. 10, if the user's mouth is obviously folded, the distance X1 between the nose and the chin is increased to X2, but the top 91 to the bottom end 92 of the conventional mask 90 of the US Pat. No. 6,123,077 patent. The length is fixed to be approximately greater than or equal to X1, so that if the user's mouth is clearly closed, the distance between the nose and the chin increases to X2 and exceeds X1, so that the mask is pulled by the chin and the entire mask is pulled down. The adhesion between the mask and the face is deteriorated, and even the nose is exposed, resulting in a high probability of leakage, thereby reducing the protective effect.

In addition, a folding mask design is also provided in the Taiwan Patent Invention Certificate TW I321056B1, which differs from the prior art described above in that the folding mask is an integral structure of upper, middle and lower parts. a surface, and a plurality of stepped extensions are formed on the central surface, and the effective filtering area of the central surface is enlarged by the expansion of the plurality of creases, but the central surface is There is no proper fixing structure at both ends of the corrugated portion, so when it is unfolded together with the upper and lower facets, the wrinkles of the middle facet lack support and are easily deformed due to external force, such as airflow caused by breathing, and collapse and deformation. The latter mask also has a problem that the degree of adhesion to the face is deteriorated, resulting in a higher probability of leakage, thereby reducing the protective effect.

In view of the above-mentioned shortcomings of the prior art, the present invention designs a foldable three-dimensional mask so that when the user's mouth is clearly stretched, the entire mask is not pulled down because the mask is pulled by the chin, and it is not easy because The external force causes the mask to be deformed, thereby avoiding the problem that the adhesion between the mask and the face is deteriorated, and the leakage rate is lowered, thereby obtaining an effective protective effect.

In order to achieve the above object, the present invention provides a foldable three-dimensional mask comprising a mask body and at least one fixed strap body, the mask body including an upper portion, a lower portion and a portion between the upper and lower portions The central portion has a central portion and at least one inward fold extending from the central portion.

Preferably, the inner fold includes an upper inner fold between the central portion and the upper portion.

Preferably, the inward fold further comprises a lower inward fold between the central region and the lower portion.

Preferably, the central region includes an upper edge, a lower edge and two fixed ends, the lower edge is opposite to the upper edge, and the two fixed ends are respectively located at the upper edge and the lower edge And opposite each other, wherein the upper inner fold is connected to the upper edge, wherein the lower inner fold is connected to the lower edge.

Preferably, the upper inner fold has a first upper inner fold surface, a second upper inner fold surface, and an upper inner fold surface, and the first and second upper inner fold surfaces are opposite to each other. a crease is formed between the first and second upper inner folding faces, and two sides of the first and second upper inner folding faces respectively have an upper left segment and an upper right segment opposite to each other, and the first and the The upper left segments of the two upper inner folded faces overlap each other in parallel, and the upper right segments of the first and second upper inner folded faces overlap each other in parallel. More preferably, the outer ends of the first upper inner fold surface and the second upper inner fold surface are opposite to the upper inner fold, and the outer ends of the first upper inner fold surface and the second upper inner fold surface are mutually overlapping.

Preferably, the outer side end of the first upper inner fold surface is connected to the upper edge of the central area, and the upper inner fold is away from the outer side end of the first upper inner fold surface or the second upper inner side. The outer end of the folded surface is at least 3 mm (mm) to 60 mm (mm).

Preferably, the upper left segment of the first and second upper inner folds are overlapped and fixed, and the two upper right segments are also overlapped and fixed.

Preferably, the upper left segment of the first and second upper inner folds is fixed to overlap with the central portion and the upper portion, and the upper right segment of the first and second upper inner folds is The central region and the upper portion are overlapped and fixed.

Preferably, the upper left segment and the upper right segment of the first upper inner folded surface are respectively fused and fixed to the central region, wherein the upper left segment and the upper right segment of the second upper inner folded surface respectively The upper portion is overlapped and fixed.

Preferably, the lower inner fold has a first lower inner fold surface, a second lower inner fold surface, a lower inner fold surface, and the first and second lower inner fold surfaces are opposite to each other, the lower portion An inner crease is formed between the first and second lower inner folding surfaces, and two sides of the first and second lower inner folding surfaces respectively have a lower left side and a lower right side opposite to each other, and the first and second sides The lower left segment of the lower inner folded surface overlaps with each other in parallel, and the lower right segment of the first and second lower inner folded faces overlap each other in parallel. More preferably, the outer ends of the first lower inner fold surface and the second lower inner fold surface are opposite to the lower inner fold, and the outer ends of the first lower inner fold surface and the second lower inner fold surface are mutually overlapping.

Preferably, the outer side end of the first lower inner fold surface is connected to the lower edge of the central portion, and the lower inner fold is away from the outer side end of the first lower inner fold surface or the second lower inner end. The lateral end of the folded surface is at least 3 mm (mm) to 60 mm (mm).

Preferably, the lower left side of the first and second lower inner folds are overlapped and fixed, and the two lower right sides are also overlapped and fixed.

Preferably, the lower left segment of the first and second lower inner folds is fixed to overlap with the central portion and the lower portion, and the lower right segment of the first and second upper inner folds is The central region and the upper portion are overlapped and fixed.

Preferably, the lower left segment and the lower right segment of the first lower inner folded surface are respectively fused and fixed to the central region, and the lower left segment and the lower right segment of the second lower inner folded surface are respectively They are respectively fused and fixed to the lower portion.

Preferably, the upper portion has an upper flange and a front edge, and the upper flange is adjacent to the outer end of the second upper inner surface and overlaps the upper edge of the central portion. The front edge is opposite the upper flange.

Preferably, the lower portion has a lower flange and a bottom edge, and the lower flange is in contact with the outer end of the second lower inner surface and overlaps the lower edge of the central portion, and The bottom end edge is formed with respect to the lower flange.

Preferably, the inner fold includes a first upper inner fold, a second upper inner fold and a third upper inner fold, wherein the first upper inner fold is connected to the central area, the second The upper inner fold is connected to the first upper inner fold, and the third upper inner fold is connected to the second upper inner fold and also connected to the upper portion.

Preferably, the inner fold further comprises a first lower inner fold, a second lower inner fold and a third lower inner fold, wherein the first lower inner fold is connected to the central region, the first The lower inner fold is connected to the first lower inner fold, and the third lower inner fold is connected to the second lower inner fold and is also connected to the lower portion.

Preferably, the fixing strap system is a flexible cord body fixed to the fixed end of the central region by wire fixing, ultrasonic fusion bonding or a fastening clip. Preferably, the mask body further has a stiff material, is flexible, and is fixed inside the central region.

Preferably, the mask body further has a nose piece which is located inside or on the surface of the upper portion and is parallel to the front end edge.

Preferably, the mask body further has a foam which is located inside the upper portion and overlaps the front end edge in parallel.

Preferably, the mask body further has an exhalation valve which is disposed in the middle of the central region. Preferably, the mask system is made of a plurality of layers of non-woven material, wherein the multi-layer nonwoven material is selected from a spunbond nonwoven fabric having a certain thickness and flexibility.

Preferably, the mask body further comprises at least one melt-blown nonwoven filter material.

The invention has the advantages that the design of the inner fold or the lower inner fold at the central portion makes the whole device not pulled down by the chin when the mouth is stretched, and the external force is not caused by the external force. The airflow caused by the breathing causes the central region of the present invention to be deformed, thereby avoiding the deterioration of the adhesion between the mask and the face, reducing the leakage rate, and obtaining an effective protective effect.

Referring to FIG. 1 to FIG. 2, the folding three-dimensional mask of the present invention comprises a mask body 10 and at least one fixing strap body 20. The mask body 10 described above is made of a plurality of layers of non-woven material, and has a central portion 11, an upper portion 12 and a lower portion 13, wherein the central portion 11 is located between the upper and lower portions 12, 13 and the upper portion 12 and the lower part 13 are connected. The multi-layer non-woven material is selected from a spunbond non-woven material having a certain thickness and flexibility. Optionally, the mask body 10 further comprises a filter material selected from a melt-blown nonwoven material.

Referring to FIG. 1 to FIG. 2, the central portion 11 has a central portion 111 and at least one inner fold formed by the central portion 111. The inner fold includes an upper inner fold 112 formed in the central portion. Between the 111 and the upper portion 12, and a lower inward fold 113 are formed between the central region 111 and the lower portion 13. The central region 111 is flat and includes an upper edge 1111, a lower edge 1112 and two fixed ends 1113, 1113', a lower edge 1112 relative to the upper edge 1111, and the two fixed ends 1113, 1113' The systems are respectively located between the upper edge 1111 and the lower edge 1112 and are opposite each other. The upper inner fold 112 is connected to the upper edge 1111, and the lower inner fold 113 is connected to the lower edge 1112.

Referring to FIG. 3 , the upper inner fold portion 112 has a first upper inner fold surface 1121 , a second upper inner fold surface 1122 , and an upper inner fold surface 1123 . The outer side end of the first upper inner folded surface 1121 is connected to the upper edge 1111 of the central portion 111, and the first and second upper inner folded surfaces 1121, 1122 are opposite to each other. The first upper inner folded surface 1121 and the second side are opposite to each other. The outer end of the upper inner fold surface 1122 is opposite to the upper inner fold 1123, and the outer ends of the first upper inner fold surface 1121 and the second upper inner fold surface 1122 overlap each other, and the upper inner fold 1123 Formed between the first and second upper inner fold faces 1121, 1122, and at least 3 mm (mm) from the outer side end of the first upper inner fold surface 1121 or the outer side end of the second upper inner fold surface 1122 Between 60 millimeters (mm), both sides of the first and second upper inner folded faces 1121, 1122 have an upper left segment 1124, 1124' and an upper right segment 1125, 1125' opposite each other, and the first 1. The upper left segments 1124, 1124' of the second upper inner folded surface 1121, 1122 overlap each other in parallel, and the upper right segments 1125, 1125' of the first and second upper inner folded surfaces 1121, 1122 overlap each other in parallel, see As shown in FIG. 4, the upper left segments 1124, 1124' of the first and second upper inner folded faces 1121, 1122 are overlapped and fixed, and the two upper right segments 1125 are 1125' is also overlapped and fixed, wherein the upper left portion 1124, 1124' of the first and second upper inner folded surfaces 1121, 1122 is further fixed to overlap with the central portion 111 and the upper portion 12, and the first and second upper portions are fixed. The upper right side segments 1125, 1125' of the inner fold faces 1121, 1122 are more fixed to overlap the central region 111 and the upper portion 12.

The lower inner fold 113 has a first lower inner fold surface 1131, a second lower inner fold surface 1132, and a lower inner fold surface 1133. The outer side end of the first lower inner fold surface 1131 is connected to the lower edge 1112 of the central portion 111, and the first and second lower inner fold surfaces 1131, 1132 are opposite to each other. The first lower inner fold surface 1131 The outer end of the second lower inner fold surface 1132 is opposed to the lower inner fold 1133, and the outer ends of the first lower inner fold 1131 and the second lower inner fold 1132 are overlapped with each other. The lower inner crease 1133 is formed between the first and second lower inner folding surfaces 1131, 1132, and is located at an outer side end of the first lower inner folding surface 1131 or an outer side end of the second lower inner folding surface 1132. Between at least 3 millimeters (mm) and 60 millimeters (mm), both sides of the first and second lower inner folds 1131, 1132 have a lower left side 1134, 1134' and a lower right side 1135, 1135' opposite each other. And the lower left segments 1134, 1134' of the first and second lower inner folding surfaces 1131, 1132 are parallel to each other, and the lower right segments 1135, 1135' of the first and second lower inner folding surfaces 1131, 1132 are parallel to each other. As shown in FIG. 4 , the lower left segments 1134 and 1134 ′ of the first and second lower inner folded surfaces 1131 and 1132 are overlapped and fixed, and the two lower right segments 1135 and 1135 ′ are also overlapped and fixed. The lower left side segments 1134, 1134' of the first and second lower inner fold faces 1131, 1132 are further overlapped with the central region 111 and the lower portion 13 and the lower right side of the first and second lower inner fold faces 1131, 1132 The segments 1135, 1135' are further overlapped with the central region 111 and the lower portion 13.

Further, as shown in FIG. 4, the upper portion 12 is connected to the central portion 11 and has an upper flange 121 and a front edge 122, wherein the upper flange 121 and the second upper inner surface 1122 are formed. The outer ends of the central region 111 are in parallel with the upper edge 1111 of the central region 111, and the front edge 122 is opposite to the upper flange 121.

The lower portion 13 is connected to the central portion 11 and has a lower flange 131 and a bottom edge 132. The lower flange 131 is connected to the outer end of the second lower inner surface 1132 and The lower edge 1112 of the central region 111 overlaps in parallel and is formed with respect to the lower flange 131.

The fixing strap body 20 is an elastic rope body, wherein the two ends of each fixing strap body 20 are respectively fixed to the two fixed ends 1113 and 1113', which are head-mounted, in a preferred embodiment. In the example, one end of one of the fixing straps 20 is fixed to the one fixed end 1113, and the other ends of the other fixing strap 20 are fixed to the other fixed end 1113', which is an ear-hook type. In one embodiment, one end of one of the fixing straps is fixed to the one fixed end 1113, and one end of the other fixing strap 20 is fixed to the other fixed end 1113', and the two fixing straps The other two ends of the 20 are fastened by a knot-type buckle. The aforementioned fastening method includes wire fixing or ultrasonic fusion bonding.

In a preferred embodiment, the inner fold further includes a first upper inner fold, a second upper inner fold and a third upper inner fold, wherein the first upper inner fold is connected to the upper edge 1111 The second upper inner fold is connected to the first upper inner fold, and the third upper inner fold is connected to the second upper inner fold, and the third upper inner fold is also connected to the upper fold 121 connected. The outer end side of the first upper inner fold surface of the first upper inner fold is connected to the upper edge 1111, and the outer side end of the second upper inner fold of the first upper inner fold is connected to the second upper end The outer end side of the first upper inner fold surface of the inner fold is connected, and the outer side end of the second upper inner fold of the second upper inner fold is connected with the first upper inner fold of the third upper inner fold The outer ends are connected, and the outer side ends of the second upper inner folds of the third upper inner fold are connected to the upper flanges 121.

In a preferred embodiment, the inner fold portion further includes a first lower inner fold, a second lower inner fold and a third lower inner fold, wherein the first lower inner fold is connected to the lower edge 1112 The second lower inner fold is connected to the first lower inner fold, and the third lower inner fold is connected to the second lower inner fold, and the third lower inner fold is also connected to the lower flange 131 phase connection. The outer side end of the first lower inner fold surface of the first lower inner fold is connected to the lower edge 1112, and the outer side end of the second lower inner fold of the first lower inner fold is connected with the second lower end The outer end side of the first lower inner fold surface of the inner fold is connected, and the outer side end of the second lower inner fold of the second lower inner fold is connected with the first lower inner fold of the third lower inner fold The outer ends are connected, and the outer ends of the second lower inner folds of the third lower inner fold are connected to the lower flanges 131.

As shown in FIG. 1 to FIG. 2, in a preferred embodiment of the present invention, the mask body 10 further has a stiff material 14 made of polyester, such as polyester fiber, which is flexible and located. The central region 11 is internally fixed to the central region 11 by a peripheral weld line 15, and the stiff material 14 is shaped to help increase the shaping of the central region 11 and avoid the use of the external force. It is the airflow caused by breathing and collapses.

Referring to FIG. 3, in a preferred embodiment of the present invention, the upper left segment 1124 and the upper right segment 1125 of the first upper inner folded surface 1121 are respectively overlapped and fixed with the central region 111, wherein the second upper inner portion The upper left side 1124' and the upper right side 1125' of the folded surface 1122 are respectively overlapped and fixed with the upper portion 12, and the lower left side 1134 and the lower right side 1135 of the first lower inner folded surface 1131 are respectively separated from the central area 111. The lower left side section 1134' and the lower right side section 1135' of the second lower inner fold surface 1132 are overlapped and fixed to the lower surface portion 12, respectively.

Referring to FIG. 2 and FIG. 4, in a preferred embodiment, the mask body 10 further has a nose piece 17 located inside or on the surface of the upper portion 12 and parallel to the front end edge 122 so that Fitted with the bridge of the nose.

In a preferred embodiment, the mask body further has a foam which is located inside the upper portion 12 and overlaps the front end edge 122 in parallel, thereby increasing the comfort of the user when wearing and improving the mask body 10. The degree of closeness to the face.

Referring to FIG. 5, in a preferred embodiment of the present invention, the mask body 10 further has an exhalation valve 16 which is disposed in the middle of the central region 11 to help reduce user use. The hot gas exhaled at the time of the present invention is retained in the present invention.

Referring to FIG. 1 to FIG. 4, when the present invention is not in use, the upper inner fold portion 112 overlaps with the central portion 111 and the upper portion 12, and the lower inner fold portion 113 overlaps the central portion 111 and the lower portion 13 . The upper portion 12 and the lower portion 13 also overlap the central portion 11. In a preferred embodiment, the upper portion 12 is located at the outermost side, and the upper portion 12 has a flange 121 parallel to the upper edge 1111 of the central portion 111. Overlap, the lower edge 131 of the lower portion 13 overlaps the lower edge 1112 of the central region 111 in parallel.

Referring to FIG. 6, when the present invention is ready for use, the upper portion 12 and the lower portion 13 are first deployed in opposite directions, so that the present invention becomes a three-dimensional structure in which the central portion 11 and the upper and lower portions 12 and 13 are disposed. Form an accommodation space.

Referring to FIG. 7 and FIG. 8 , the user's nose and mouth are located in the aforementioned accommodating space when the user is in use, so that the mouth portion faces the central portion 11 and the upper portion 12 covers the user's nose. And the lower part 13 covers the user's chin, and the nose piece 17 located at the upper part 12 is used to increase the fit with the bridge of the nose. When the user's mouth is closed, the distance between the nose and the chin is X1, and the above upper fold is The portion 112 and the lower inward fold 113 overlap with the central region 111. When the user's mouth is obviously opened, the distance between the nose and the chin is increased from X1 to X2, and the upper inner fold 112 and the lower inner fold are formed. 113 is respectively engaged with the increased length (X2-X1), at which time the first and second upper inner folds 1121, 1122, the upper inner fold 1123, the first and second lower inner folds 1131, 1132, and the lower The inner crease 1133 is exposed, the central portion 11 is fully deployed, and the user's mouth and nose are not exposed, so that the present invention maintains a good degree of adhesion with the user's face, reduces the leakage rate, and thereby obtains an effective protective effect. The technical feature of the present invention is that, with the design of the inner fold 112 or the lower inner fold 113 above the central portion 11, when the user's mouth is closed, the upper and lower inward folds 112, 113 are folded when used. When the mouth of the mouth is opened, when the mask body 10 is pulled by the chin, the upper or lower inner folds 112, 113 are deployed and the first and second upper inner folds 1121, 1122 and the upper inner fold 1123 or the first and second The lower inner folds 1131, 1132 and the lower inner fold 1133 are exposed, and the central portion 11 is extended.

And the upper and lower left segments 1124, 1134, the upper and lower right segments 1125, 1135 of the first upper and lower inner folded faces 1121, 1131 are respectively overlapped and fixed with the central region 111, and the second upper portion is When the upper and lower left segments 1124', 1134' and the upper and lower right segments 1125' and 1135' of the lower inner folded surface 1122, 1132 are overlapped and fixed with the upper and lower portions 12, 13 respectively, the inner fold can be expanded. The structural strength is not easily collapsed, and an accommodation space having an appropriate volume can be maintained without simultaneously damaging the degree of adhesion of the mask body 10 to the user's face.

The above description is only a preferred example of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been disclosed above by way of a preferred example, it is not intended to limit the creation, any person skilled in the art, The equivalents of the above-described technical contents may be modified or modified to equivalent changes without departing from the spirit and scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments are still within the scope of the present invention.

10. . . Mask body

11. . . Central part

12. . . Upper part

13. . . Below

14. . . Stiff material

15. . . Surrounding wire

16. . . Exhalation valve

17. . . Nose piece

20. . . Fixed strap

90. . . Conventional mask

91. . . top

92. . . Bottom end

111. . . Central area

112. . . Upper inner fold

113. . . Lower inferior fold

121. . . Upper flange

122. . . Front edge

131. . . Lower flange

132. . . Bottom edge

1111. . . Upper edge

1112. . . Lower edge

1113. . . Fixed end

1113’. . . Fixed end

1121. . . First upper inner fold

1122. . . Second upper inner fold

1123. . . Upper crease

1124. . . Upper left segment

1124’. . . Upper left segment

1125. . . Upper right segment

1125’. . . Upper right segment

1131. . . First lower inner fold

1132. . . Second lower inner fold

1133. . . Lower inner crease

1134. . . Lower left segment

1134’. . . Lower left segment

1135. . . Lower right segment

1135’. . . Lower right segment

Figure 1 is a front folding view of the present invention

Figure 2 is a side sectional view of the present invention

3 is an external view of another preferred embodiment of the present invention

Figure 4 is a rear folded view of the present invention

Figure 5 is an external view of another preferred embodiment of the present invention

Figure 6 is a rear view of the back of the present invention

Figure 7 is a schematic view of the wear of the user when the user's mouth is closed.

Figure 8 is a schematic view of the wear of the user when the user's mouth is opened.

Figure 9 is a schematic view of the prior art when the user's mouth is closed.

Figure 10 is a schematic view of the prior art when the user's mouth is opened.

10. . . Mask body

11. . . Central part

15. . . Surrounding wire

20. . . Fixed strap

111. . . Central area

112. . . Upper inner fold

113. . . Lower inferior fold

121. . . Upper flange

1111. . . Upper edge

1112. . . Lower edge

1113. . . Fixed end

1113’. . . Fixed end

1134. . . Lower left segment

1134’. . . Lower left segment

Claims (25)

A folding three-dimensional mask comprising a mask body and at least one fixing strip body, the mask body comprising an upper portion, a lower portion and a central portion between the upper and lower portions, the central portion having a central portion a region and at least one inward fold formed by the central region. The foldable three-dimensional mask of claim 1, wherein the inner fold comprises an upper inner fold between the central region and the upper portion. The foldable three-dimensional mask of claim 2, wherein the inner fold further comprises a lower inward fold between the central region and the lower portion. The folding three-dimensional mask of claim 3, wherein the central region comprises an upper edge, a lower edge and two fixed ends, the lower edge is opposite the upper edge, and the two fixed ends are Located between the upper edge and the lower edge and opposite to each other, wherein the upper edge is connected to the upper inner fold, and the lower edge is connected to the lower inner fold. The folding three-dimensional mask according to claim 4, wherein the upper inner fold has a first upper inner fold surface, a second upper inner fold surface, and an upper inner fold surface, and the first and the first The upper upper inner fold is formed on the two sides, and the upper inner fold is formed between the first and second upper inner folds, and the outer ends of the first upper inner fold and the second upper inner fold are connected to the upper end The inner folds are opposite, and the outer ends of the first upper inner fold surface and the second upper inner fold surface overlap each other, and both sides of the first and second upper inner fold surfaces have an upper left side and an upper side The right segments are opposite each other, and the upper left segments of the first and second upper inner folds overlap each other in parallel, and the upper right segments of the first and second upper inner folds overlap each other in parallel. The foldable three-dimensional mask of claim 5, wherein the outer side end of the first upper inner fold surface is connected to the upper edge of the central portion, and the upper inner fold is away from the first upper inner fold. The outer side end of the face or the outer side end of the second upper inner fold face is at least between 3 mm (mm) and 60 mm (mm). The foldable three-dimensional mask of claim 6, wherein the upper left side of the first and second upper inner folds are overlapped and fixed, and the upper right side of the first and second upper inner folds It is also overlapped and fixed. The foldable three-dimensional mask of claim 7, wherein the upper left side of the first and second upper inner folds is fixed to the central area and the upper part, and the first and second The upper right segment of the upper inner folded surface is fixed to overlap with the central portion and the upper portion. The foldable three-dimensional mask of claim 6, wherein the upper left side and the upper right side of the first upper inner fold are respectively overlapped and fixed with the central area, wherein the second upper inner fold The upper left segment and the upper right segment are respectively fused and fixed to the upper portion. The folding three-dimensional mask according to claim 5, wherein the lower inner fold has a first lower inner fold surface, a second lower inner fold surface, a lower inner fold, and the first and second The lower inner fold surface is opposite to each other, and the lower inner fold is formed between the first and second lower inner folds, and the outer ends of the first lower inner fold surface and the second lower inner fold surface are The lower inner creases are opposite, and the outer ends of the first lower inner folding surface and the second lower inner folding surface are overlapped with each other, and the two sides of the first and second lower inner folding surfaces respectively have a lower left side and a lower right side The segments are opposite to each other, and the lower left segments of the first and second lower inner folded faces are overlapped with each other in parallel, and the lower right segments of the first and second lower inner folded faces are overlapped with each other in parallel. The foldable three-dimensional mask according to claim 10, wherein the outer side end of the first lower inner fold surface is connected to the lower edge of the central portion, and the lower inner fold is away from the first lower inner fold. The outer side end of the face or the outer side end of the second lower inner fold face is at least between 3 mm (mm) and 60 mm (mm). The foldable three-dimensional mask of claim 11, wherein the lower left side of the first and second lower inner folds are overlapped and fixed, and the two lower right sides are also overlapped and fixed. The foldable three-dimensional mask of claim 12, wherein the lower left side of the first and second lower inner folds is fixed to the central area and the lower part, and the first and second The lower right segment of the upper inner folded surface is fixed to overlap with the central portion and the upper portion. The folding three-dimensional mask according to claim 11, wherein the lower left side portion and the lower right side portion of the first lower inner folded surface are respectively fused and fixed to the central portion, and the second lower inner fold is obtained. The lower left segment and the lower right segment of the face are respectively fixed and fixed to the lower portion. The folding three-dimensional mask according to claim 5, wherein the upper portion has an upper flange and a front edge, and the upper flange is connected to the outer end of the second upper inner surface. The front edge is opposite the upper flange. The folding three-dimensional mask according to claim 10, wherein the lower portion has a lower flange and a bottom edge, and the lower flange is connected to the outer end of the second lower inner surface, and The bottom end edge is formed with respect to the lower flange. The foldable three-dimensional mask of claim 1, wherein the inner fold includes a first upper inner fold, a second upper inner fold and a third upper inner fold, wherein the first upper inner fold Attached to the central region, the second upper inner fold is connected to the first upper inner fold, and the third upper inner fold is connected to the second upper inner fold and also to the upper The parts are connected. The folding three-dimensional mask according to claim 17, wherein the inner fold further comprises a first lower inner fold, a second lower inner fold and a third lower inner fold, wherein the first lower inner fold The second bottom inner fold is connected to the first lower inner fold, and the third lower inner fold is connected to the second lower inner fold and also The lower parts are connected. The foldable three-dimensional mask of any one of claims 1 to 18, wherein the strap system is a resilient cord that is fixed to the central region. The folding three-dimensional mask according to any one of claims 1 to 18, wherein the mask body has a stiff material, is flexible, and is fixed inside the central region. The foldable stereoscopic mask of any one of claims 1 to 18, wherein the mask body has a nose piece that is located inside or on the surface of the upper portion. The folding three-dimensional mask of any one of claims 1 to 18, wherein the mask body further has an exhalation valve that is disposed in the middle of the central region. The folding three-dimensional mask according to any one of claims 1 to 18, wherein the mask body further has a foam which is located inside the upper portion and overlaps the front end edge in parallel. The foldable three-dimensional mask of any one of claims 1 to 18, wherein the mask system is made of a plurality of layers of nonwoven material. A folding three-dimensional mask as claimed in claim 24, wherein the mask body comprises at least one melt-blown nonwoven filter material.