Mask

Abstract

The utility model relates to a mask. The mask (M) comprises a mask main body (1), band-shaped ear hanging parts (2, 2) which are respectively arranged at the left end part and the right end part of the mask main body, more than one left combining part (3) and more than one right combining part (4) which are formed by combining the ear hanging parts (2) and the mask main body, and a nose bridge strip (5) which is arranged in the mask main body in a manner of extending along the left-right direction. In a mask (M), the positions of a first left coupling part (3a) and a first right coupling part (4a), which are located on the uppermost side, are offset in the vertical direction with respect to the position of a nose bridge strip (5), and when the mask is worn, the mask body can be folded into a plurality of layers along at least one fold line (F1, F2) extending in the left-right direction. The nose bridge strip and any one of the first left combination part and the first right combination part do not belong to the same layer. This makes it difficult to generate a gap between the mask body and the face.

Description

Technical Field

[0001] The utility model relates to a mask. Background Art

[0002] Patent Document 1 discloses a pleated mask that covers the wearer's nostrils and mouth. The mask in Patent Document 1 includes a mask body made of a breathable sheet, a nose bridge integrated into the mask body, and ear hooks for attaching the mask body to the face. The mask in Patent Document 1 utilizes pleats to adapt the mask's shape to the wearer's face, and deforms the nose bridge to match the shape of the wearer's nose, thereby stabilizing the mask body's wearing position.

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2021-110054 Utility Model Content

[0004] Technical problems to be solved by utility models

[0005] When a gap forms between the face and the mask body, air or exhaled air can enter and exit through it, preventing the mask body from fully utilizing its filtering function and causing glasses to fog up due to exhaled air. Therefore, when wearing a mask, the wearer should ensure that the nose bridge fits snugly against the wearer's nose and the sides of the nose, minimizing the gap between the mask and the face.

[0006] However, even when there is virtually no gap initially, a gap can form between the nose and the mask body at or near the sides of the nose as the wearer's face moves, particularly when the mouth moves for breathing, talking, or the like. Specifically, when the wearer moves their mouth, tension is applied to the ear hooks on the left and right sides of the mask body. This tension causes the nose bridge, which is aligned with the ear hooks, to be pulled left or right. Consequently, the nose bridge, which is aligned with the nose and its sides, deforms into a line that approximates a straight line extending in the direction of the tension applied to the ear hooks, resulting in a gap between the nose bridge and the face.

[0007] In view of the above problems, the purpose of the present invention is to make it difficult for a gap to be generated between the mask body and the face.

[0008] Technical solutions to technical problems

[0009] The first aspect of the present invention relates to a mask M, which includes a mask body 1, an ear hook 2, a left joint 3, a right joint 4 and a nose bridge strip 5. The ear hook 2 is strip-shaped and is respectively arranged at the left and right ends of the mask body 1. There are more than one left joint 3 and they are arranged at more than one place at the left end of the mask body 1. The left joint 3 is formed by combining the ear hook 2 with the mask body 1. There are more than one right joint 4 and they are arranged at more than one place at the right end of the mask body 1. The right joint 4 is formed by combining the ear hook 2 with the mask body 1. The nose bridge strip 5 is arranged in the mask body 1 in a manner extending along the left and right directions. As for the mask M, when the left joint 3 located at the uppermost side is used as the first left joint 3a, and the right joint 4 located at the uppermost side is used as the first right joint 4a, in the mask body 1, the positions of the first left joint 3a and the first right joint 4a are offset in the up and down directions relative to the position of the nose bridge strip 5. As for the mask M, the mask body 1 can be folded into multiple layers along at least one fold line F1~F3 extending in the left and right directions. In the multiple layers, the nose bridge strip 5 and any of the first left joint 3a and the first right joint 4a do not belong to the same layer.

[0010] In this first aspect, the first left joint portion 3a and the first right joint portion 4a are both significantly offset in the vertical direction relative to the position where the nose bridge strip 5 is provided in the mask body 1. The inventors of the present application have discovered that by doing so, the tension applied to the ear hook 2 is less likely to affect the nose bridge strip 5, thereby preventing the nose bridge strip 5 from deforming and not fitting the nose. Therefore, even if the wearer moves their mouth, for example, by talking, and the ear hook 2 is subjected to tension as the mask body 1 moves, deformation of the nose bridge strip 5 caused by this tension can be suppressed. In other words, according to the first aspect, it is easy to maintain the nose bridge strip 5 in a state of fitting the wearer's nose and the sides of the nose. As a result, it is difficult for a gap to form between the mask body 1 and the face.

[0011] In the second aspect, based on the first aspect, the first left joint portion 3a and the first right joint portion 4a are both located below the position of the nose bridge strip 5 in the mask body 1, and the mask body 1 has a first area R1, a second area R2 and a third area R3, the first area R1 extends in the entire left-right direction and includes a portion where the first left joint portion 3a and the first right joint portion 4a are provided, and covers at least the wearer's mouth when worn, the second area R2 extends in the entire left-right direction and is located above the first area R1 and below the portion where the nose bridge strip 5 is provided, and the third area R3 extends in the entire left-right direction and includes a portion where the first left joint portion 3a and the first right joint portion 4a are provided, and covers at least the wearer's mouth when worn. The region R3 extends in the entire left-right direction, and is located above the second region R2 and includes a portion where the nose bridge strip 5 is provided, and is located above the wearer's mouth when worn. When the dividing line between the first region R1 and the second region R2 is used as the first dividing line, and the dividing line between the second region R2 and the third region R3 is used as the second dividing line, when the mask is worn, the first dividing line and the second dividing line are used as the folding lines F1 and F2, and the mask body 1 is folded into three layers in a Z shape when viewed from the left-right direction in such a way that the third region R3 becomes the layer closest to the face.

[0012] In this second aspect, when the mask is worn, the mask body 1 is folded into three layers, with the third region R3 containing the nose bridge strip 5 being the layer closest to the face. This allows the nose bridge strip 5 to easily fit the wearer's nose and surrounding areas. Furthermore, even if the mask body 1 moves forward, up, down, or left or right as the wearer's mouth moves, the first region R1 covering the wearer's mouth is directly affected by the wearer's mouth movements, so the nose bridge strip 5 located in the third region R3 is less susceptible to these movements. As a result, a gap is less likely to form between the mask body 1 and the face.

[0013] The third aspect is based on the second aspect. The mask body 1 further has a fourth area R4, which extends in the entire left-right direction and is closer to the upper side than the third area R3. When the dividing line between the third area R3 and the fourth area R4 is used as the third dividing line, when wearing the mask, the first dividing line, the second dividing line and the third dividing line are used as the fold lines F1~F3, and the mask body 1 is folded into four layers in an M shape when viewed from the left and right directions in such a way that the fourth area R4 becomes the layer closest to the face.

[0014] In this third aspect, when the mask is worn, the mask body 1 is folded into an M-shape, with the layer of the fourth region R4 positioned between the layer of the third region R3 and the wearer's face. Because the layer of the fourth region R4 fills the space between the nose bridge 5 and the face, a gap is unlikely to form between the mask body 1 and the face.

[0015] In the fourth aspect, in the second or third aspect, a plurality of welded portions B are arranged at intervals along the fold line serving as the first dividing line on the mask body 1, and the welded portions B are formed by welding the upper end portion of the first region R1 and the lower end portion of the second region R2 to each other.

[0016] In this fourth aspect, the mask body is provided with a welded portion B, making it easier to maintain the folded state along the fold line F1. For example, even if the internal pressure between the layer belonging to the first region R1 and the layer belonging to the second region R2 increases due to the wearer sneezing, the layer belonging to the second region R2 and the layer belonging to the third region R3 are less likely to bulge upward from the mask body 1. In other words, according to the fourth aspect, it is easier to maintain the mask body 1 in a state folded in a Z-shape or M-shape. As a result, the nose bridge strip 5 is not only less susceptible to the tension exerted on the ear hook portion 2 due to the wearer's mouth movements, but is also less susceptible to the sudden changes in the internal pressure between the mask body 1 and the face. In other words, according to the fourth aspect, the deformation of the nose bridge strip 5 is more easily suppressed, resulting in a greater difficulty in forming a gap between the mask body 1 and the face.

[0017] Effect of utility model

[0018] According to the utility model, it is difficult to generate a gap between the mask body and the face. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a front view showing a mask according to a first embodiment.

[0020] FIG. 2 is a diagram showing the first to third regions and a broken line in the mask shown in FIG. 1 .

[0021] FIG3 is a cross-sectional view showing a cross section taken along line III-III of FIG1 to FIG2 .

[0022] FIG. 4 is a front view showing the mask shown in FIG. 1 and FIG. 2 in a folded state.

[0023] FIG. 5 is a cross-sectional view showing a cross section taken along line VV of FIG. 4 .

[0024] FIG6 is a cross-sectional view showing a cross section taken along line VI-VI of FIG1 to FIG2.

[0025] FIG. 7 is a diagram corresponding to FIG. 2 , showing a mask according to a second embodiment.

[0026] FIG8 is a diagram corresponding to FIG5 , showing a mask according to a second embodiment.

[0027] Explanation of symbols

[0028] M-mask; 1-mask body; 1a-front side panel; 1b-back side panel; 2-ear hook; 3-left joint; 3a-first left joint; 3b-second left joint; 4-right joint; 4a-first right joint; 4b-second right joint; 5-nose bridge; R1-first area; R2-second area; R3-third area; R4-fourth area; F1-fold line (first dividing line); F2-fold line (second dividing line); F3-fold line (third dividing line); B-welding part; L-dashed line; P-pleat. DETAILED DESCRIPTION

[0029] The following preferred embodiments are merely examples of the present invention and are not intended to limit the present invention, its application objects, or its uses.

[0030] (First embodiment)

[0031] The structure of the mask

[0032] Figures 1 to 5 illustrate a mask M according to a first embodiment. The mask M comprises a mask body 1 and a pair of elastically deformable, band-shaped ear hooks 2, 2. The ear hooks 2, 2 are provided at the left and right ends of the mask body 1, respectively. The material is not limited; the mask body 1 may be made of, for example, nonwoven fabric.

[0033] As shown in Figures 1 and 2, the mask M includes two left joints 3 (3a, 3b) formed by the left ear hook 2 and the mask body 1, and two right joints 4 (4a, 4b) formed by the right ear hook 2 and the mask body 1. The ear hooks 2, 2 are welded to the mask body 1 at the left joints 3 and right joints 4. Hereinafter, the upper left joint 3 of the two left joints 3 (3a, 3b) will be referred to as the first left joint 3a, and the lower left joint 3 will be referred to as the second left joint 3b. Furthermore, the upper right joint 4 of the two right joints 4 (4a, 4b) will be referred to as the first right joint 4a, and the lower right joint 4 will be referred to as the second right joint 4b.

[0034] As shown in Figures 1 and 3, the mask body 1 is constructed by overlapping the front side panel 1a and the back side panel 1b that are integrated at the peripheral edge. When the mask M is worn, the back side panel 1b faces the wearer's face. Pleats P are provided on the front side panel 1a and the back side panel 1b, and the pleats P are formed by folding creases extending in the left-right direction. It should be noted that in this specification, the "front side" refers to the side opposite to the side where the wearer's face is located when the mask M is worn, and the "back side" refers to the side where the wearer's face is located when the mask M is worn. Figures 1, 2 and 4 show the mask M observed from the back side panel 1b.

[0035] The mask M includes a nose bridge strip 5 disposed between the front side panel 1a and the back side panel 1b. The nose bridge strip 5 is disposed near the upper end of the mask body 1, extending in the horizontal direction. It should be noted that the front side panel 1a and the back side panel 1b are integrated along an imaginary line L, which is located above and below the portion where the nose bridge strip 5 is disposed and extends in the horizontal direction. It should be noted that ultrasonic welding, for example, can be used to integrate the front side panel 1a and the back side panel 1b along the imaginary line L.

[0036] In the mask body 1, the positions of the first left connecting portion 3a and the first right connecting portion 4a are both offset downward relative to the position of the nose bridge 5. Specifically, the distance between the upper ends of the first left connecting portion 3a and the first right connecting portion 4a and the extension of the lower end of the nose bridge 5 is preferably at least equal to the vertical width of the nose bridge 5. By offsetting the positions of the first left connecting portion 3a and the first right connecting portion 4a downward relative to the position of the nose bridge 5, the mask body 1 can be folded along two fold lines F1 and F2 extending in the left-right direction when the mask M is worn, as shown in Figures 4 and 5.

[0037] In the folded state, as shown in Figures 4 and 5 , the upper portion of the mask body 1 comprises three layers. Of these three layers, the nose bridge 5 and either the first left connecting portion 3a or the first right connecting portion 4a are not part of the same layer. It should be noted that the "three layers" mentioned here do not count the front side panel 1a and the back side panel 1b as one layer each, but rather the thickness of the entire mask body 1 as one layer.

[0038] As shown in Figure 2, fold line F1 extends along the boundary between the first and second regions R1, R2 of the mask body 1, and fold line F2 extends along the boundary between the second and third regions R2, R3 of the mask body 1. The first region R1 extends entirely in the left-right direction, encompassing the area where the first left connecting portion 3a and the first right connecting portion 4a are located. When worn, it covers at least the wearer's mouth. The second region R2 extends entirely in the left-right direction, located above the first region R1 and below the area where the nose bridge strip 5 is located. The third region R3 extends entirely in the left-right direction, encompassing the area where the nose bridge strip 5 is located, and when worn, it is located above the wearer's mouth.

[0039] Fold line F1 is the boundary between the first region R1 and the second region R2 (the first boundary), and fold line F2 is the boundary between the second region R2 and the third region R3 (the second boundary). As shown in Figure 5, along these fold lines F1 and F2, the mask body 1 is folded into three layers, forming a Z-shape when viewed from the left and right, with the third region R3 being the layer closest to the face.

[0040] The mask body 1 is provided with four welded sections B, formed by welding the upper surface of the first region R1 and the lower surface of the second region R2. These four welded sections B are spaced apart in the left-right direction along the fold line F1. As shown in Figure 6, the front side panel 1a and the back side panel 1b are joined together at each welded section B, with the front side partially folded outward and the back side (the side where the wearer's face is located) partially folded inward. As a result, the mask body 1 is folded along the fold line F1 where the welded sections B are located.

[0041] It should be noted that the mask M does not necessarily need to be in a folded state during manufacture. When the mask M is worn, it is sufficient that the nose bridge 5 is offset vertically relative to the first left connecting portion 3a and the first right connecting portion 4a to a certain degree that allows the mask body 1 to be folded into the three-layer configuration shown in Figures 4 and 5. For example, the mask M may be unfolded upon manufacture and folded when the wearer wears the mask M. Furthermore, reference lines for the fold lines F1 and F2 may be marked on the mask body 1.

[0042] How to make masks

[0043] The manufacturing method of the mask M can directly apply the general mask manufacturing method described below. A nonwoven fabric, which will become the mask body 1, is rolled into a roll and fed while folding the rolls to form pleats P. The fed nonwoven fabric is then cut into predetermined lengths and attached to a nose bridge 5, thereby producing the mask body 1. Next, the ear hooks 2, 2 are attached to the mask body 1, and the mask body 1 is folded along a fold line F1, forming a welded portion B on the fold line F1 as shown in FIG6 , thereby completing the mask M. At this point, the positions of the left and right joints 3 and 4, which form the connection between the mask body 1 and the ear hooks 2, 2, are both offset in the vertical direction relative to the position of the nose bridge 5.

[0044] Function and effect

[0045] In this embodiment, both the first left connecting portion 3a and the first right connecting portion 4a are significantly offset vertically relative to the position where the nose bridge 5 is provided in the mask body 1. The inventors of this application have discovered that by doing so, the tension exerted on the ear hooks 2 is less likely to affect the nose bridge 5, thereby preventing the nose bridge 5 from deforming and failing to conform to the nose. In particular, when the mask M is worn, by folding the mask body 1 into multiple layers along at least one fold line F1 or F2 extending in the left-right direction, and by not including the nose bridge 5 in the same layer as either the first left connecting portion 3a or the first right connecting portion 4a, the effect of tension exerted on the nose bridge 5 by the ear hooks 2 can be significantly reduced. Therefore, even if the wearer's mouth moves, such as when talking, and the ear hooks 2 are subjected to tension as the mask body 1 moves, deformation of the nose bridge 5 caused by this tension is suppressed. In other words, according to the first aspect, the nose bridge 5 is easily maintained in close contact with the wearer's nose and the sides of the nose. As a result, the formation of a gap between the mask body 1 and the face is minimized.

[0046] However, in the prior art, attempts are made to fill the gap between the mask body and the nose by installing components such as cushioning pads and liners between the mask body and the nose. However, such prior art suffers from the following problems: the gap cannot be filled because these components cannot adapt to the shape of each person's nose; the mask body is bulky and inconvenient to carry; logistics and manufacturing costs are high; and manufacturing is time-consuming. In this regard, the mask M involved in this embodiment can easily adapt to the shape of each person's nose by deforming the nose bridge strip 5. Moreover, due to its small size, it is easy to carry and logistics costs are also reduced. In addition, according to the above description, the mask M involved in this embodiment can be manufactured almost directly using general mask manufacturing methods, making it easy to manufacture and reducing manufacturing costs. As described above, the mask M involved in this embodiment has various advantages compared to the prior art.

[0047] Furthermore, in this embodiment, when the mask is worn, the mask body 1 is folded into three layers, with the third region R3 containing the nose bridge strip 5 being the layer closest to the face. This allows the nose bridge strip 5 to easily fit the wearer's nose and surrounding areas. Furthermore, even if the mask body 1 moves forward, up, down, or left or right as the wearer's mouth moves, the first region R1 covering the wearer's mouth is directly affected by the wearer's mouth movements, making the nose bridge strip 5 located in the third region R3 less susceptible to these movements. As a result, a gap is less likely to form between the mask body 1 and the face.

[0048] Furthermore, in this embodiment, as shown in FIG5 , the mask M is used in a folded state with the third region R3, where the nose bridge 5 is located, as the layer closest to the rear side, the second region R2 as the middle layer, and the first region R1 as the layer closest to the front side. Therefore, the wearer's exhaled air is trapped between the middle layer (second region R2) and the layer closest to the front side (first region R1). Therefore, even if the exhaled air passes through the filter layer of the mask body 1 and is blown upward from the upper end of the mask body 1, its intensity is weakened. As a result, fogging of the wearer's glasses can be suppressed.

[0049] Furthermore, in this embodiment, the mask body 1 is folded along the fold line F1 where the welded portion B is located. This provides at least four advantages. The first advantage is that the folded mask body 1 makes the mask M more compact compared to its unfolded, unfolded state. Therefore, when multiple masks M are displayed as merchandise, they do not take up space or are bulky, making them easier to transport and distributing in large quantities. A second advantage is that the wearer does not need to fold the mask body 1 along the fold line F1 before putting on the mask M, saving time. A third advantage is that, for example, when removing the mask M from its packaging, the mask M can be removed without touching the back of the mask body 1. This reduces the chances of the wearer's hands coming into contact with the back of the mask body 1, improving hygiene. The fourth advantage is that even when the internal pressure between the layer belonging to the first area R1 and the layer belonging to the second area R2 becomes high due to the wearer sneezing, etc., it is easy to maintain the folded state along the fold line F1, and the layer belonging to the second area R2 and the layer belonging to the third area R3 are difficult to bulge above the mask body 1.

[0050] When setting the welding part B, it is necessary to avoid the relationship between the layer belonging to the first area R1 and the layer belonging to the second area R2 being too restricted, so as to prevent the layer belonging to the third area R3 from being easily affected by the pulling force of the ear hook part 2.

[0051] In this embodiment, the presence of multiple welds B spaced apart along the fold line F1 prevents excessive restriction of the relationship between the layers belonging to the first region R1 and the layers belonging to the second region R2. Specifically, the provision of the welds B minimizes the degree of freedom of movement (deformation) of the mask body 1 to the minimum necessary to maintain the folded state along the fold line F1, thereby maintaining the aforementioned effect of minimizing the effect of the third region R3 being affected by the tension of the earloop 2.

[0052] It should be noted that the number of welded portions B is not necessarily four as in the present embodiment, but is preferably two or more, more preferably four, from the viewpoint of easily maintaining the mask body 1 in the folded state as described above.

[0053] (Second embodiment)

[0054] Hereinafter, the configuration of the second embodiment that is different from the first embodiment will be described using Figures 7 and 8. In Figures 7 and 8, the same reference numerals as those of the first embodiment are used for configurations common to those of the first embodiment.

[0055] In the mask M according to this embodiment, as shown in FIG7 , the mask body 1 further includes a fourth region extending across the entire left-right direction and positioned above the third region R3 . Using the boundary between the third region R3 and the fourth region R4 as the third dividing line, when the mask M is worn, as shown in FIG8 , the mask body 1 is folded into four layers, forming an M-shape when viewed from the left-right direction, with the first, second, and third dividing lines serving as fold lines F1 to F3 , with the fourth region R4 being the layer closest to the face.

[0056] In this embodiment, when the mask M is worn, the mask body 1 is folded into an M shape, with the layer of the fourth region R4 positioned between the layer of the third region R3 and the wearer's face. Because the layer of the fourth region R4 fills the space between the nose bridge 5 and the face, a gap is unlikely to form between the mask body 1 and the face.

[0057] In this embodiment, as shown in Figure 8 , when viewed from the direction of the wearer's mouth (the right side in Figure 8 ), the fold between the layer closest to the rear side (the side closest to the wearer's face) and the adjacent layer on the front side, where the nose bridge strip 5 is located, is inwardly concave. Consequently, exhaled air expelled from the wearer's mouth due to breathing, sneezing, etc., is easily captured between the layer closest to the rear side and the layer with the nose bridge strip 5. Consequently, the pressure of the captured exhaled air on the layer closest to the rear side tends to press against the wearer's face. As a result, exhaled air is less likely to leak upward from the upper end of the mask body 1.

[0058] In this embodiment, as shown in FIG8 , the nose bridge strip 5 is not provided on the layer closest to the wearer's face (the side closest to the wearer's face) that contacts the wearer's face. In other words, the mask fabric on the layer closest to the wearer's face acts as a cushion, making the hardness of the nose bridge strip 5 less noticeable in the nose and surrounding areas that contact the upper end of the mask body 1, resulting in a comfortable wearing experience for the mask M.

[0059] (Other Implementation Methods)

[0060] While the above embodiments describe a case where the mask body 1 is folded when worn, the mask body 1 of the present invention does not necessarily require folding. The mask M of the present invention only requires that the position of the nose bridge 5 be vertically offset relative to the positions of the first left connecting portion 3a and the first right connecting portion 4a to a certain extent. This extent allows the mask M of the present invention to be folded into multiple layers along at least one fold line extending in the horizontal direction, without the nose bridge 5 and either the first left connecting portion 3a or the first right connecting portion 4a belonging to the same layer. Furthermore, in the mask body 1, the positions of the first left connecting portion 3a and the first right connecting portion 4a may both be offset upward relative to the position of the nose bridge 5.

[0061] In addition, the folded state of the mask M when folded for use does not necessarily have to be the three-layer state shown in Figures 4 and 5, but can also be two layers: the nose bridge 5 layer and the first left joint portion 3a and the first right joint portion 4a layer.

[0062] In the above embodiments, the mask body 1 is composed of the front side panel 1a and the back side panel 1b, but as long as the nose bridge strip 5 can be provided, the mask body 1 can be composed of one sheet or three or more sheets.

[0063] The number of the joints 3 and 4 formed by the left and right ear hooks 2 and 2 and the mask body 1 is not necessarily two on the left and right sides, and can be one or three on each side.

[0064] In the above-mentioned embodiments, the mask body 1 is provided with the welded portion B, but the welded portion B may not be provided.

[0065] Industrial Applicability

[0066] The utility model is useful as a mask.

Claims

1. A mask comprising a mask body, an ear hook, a left joint, a right joint, and a nose bridge strip, wherein the ear hook is in a strip shape and is respectively arranged at the left end and the right end of the mask body, the left joint is provided at least one and is provided at at least one location on the left end of the mask body, the left joint is formed by combining the ear hook with the mask body, the right joint is provided at least one and is provided at at least one location on the right end of the mask body, the right joint is formed by combining the ear hook with the mask body, and the nose bridge strip is provided in the mask body in a manner extending in the left-right direction, characterized in that: When the left joint portion located at the uppermost side is used as the first left joint portion, and the right joint portion located at the uppermost side is used as the first right joint portion, in the mask body, the positions of the first left joint portion and the first right joint portion are both offset in the vertical direction relative to the position of the nose bridge bar. The mask body can be folded into multiple layers along at least one fold line extending in the left-right direction, wherein the nose bridge strip and either the first left joint portion or the first right joint portion do not belong to the same layer in the multiple layers.

2. The mask according to claim 1, characterized in that The first left joint portion and the first right joint portion are both located below the nose bridge in the mask body. The mask body has a first area, a second area and a third area. The first region extends in the entire left-right direction and includes a portion where the first left connecting portion and the first right connecting portion are provided, and covers at least the wearer's mouth when worn. The second area extends in the entire left-right direction and is located above the first area and below the area where the nose bridge is provided. The third area extends in the entire left-right direction, is located above the second area, includes the portion where the nose bridge is provided, and is located above the wearer's mouth when worn. When the dividing line between the first area and the second area is used as the first dividing line, and the dividing line between the second area and the third area is used as the second dividing line, when wearing the mask, the first dividing line and the second dividing line are used as the folding lines, and the mask body is folded into three layers in a Z shape when viewed from the left and right directions in such a way that the third area becomes the layer closest to the face.

3. The mask according to claim 2, characterized in that The mask body also has a fourth area, which extends in the entire left-right direction and is closer to the upper side than the third area. When the dividing line between the third area and the fourth area is used as the third dividing line, when the mask is worn, the first dividing line, the second dividing line and the third dividing line are used as the folding lines, and the mask body is folded into four layers in an M shape when viewed from the left-right direction in such a way that the fourth area becomes the layer closest to the face.

4. The mask according to claim 2 or 3, characterized in that The mask body is provided with a plurality of welded portions spaced apart from each other along the fold line serving as the first boundary line. The welded portions are formed by welding the upper end portion of the first region and the lower end portion of the second region to each other.

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