Mask

Abstract

Provided is a mask which can easily form a three-dimensional shape capable of ensuring good adhesion to the face of a wearer during use, and which can easily maintain a good use state. A mask (1) is provided with a mask body part (2) exposed to the outside, and ear cords (4, 4) on both sides of the mask body part (2). The mask body (2) is provided with: a central portion (6) which covers the central portion of the face of the wearer in the longitudinal direction; folded portions (7, 7) which are connected to the sides of the central portion (6) and which are folded in the longitudinal direction of the mask body (2); and side portions (8, 8) which are connected to the sides of the folded portions (7, 7) and which cover the sides of the face of the wearer. The central portion (6) has an upper narrowing portion (10, 10) and a lower narrowing portion (11, 11) in which the width in the left-right direction decreases from the central portion to the upper and lower, and the mask main body portion (2) is folded by the folding portions (7, 7) when not in use, and the folding portions (7, 7) are raised by the tension of the ear cords (4, 4) when in use to form a three-dimensional shape.

Description

Technical Field

[0001] The present invention relates to masks suitable for various uses, such as household masks and medical masks. Background Art

[0002] In the past, various masks were used to prevent the wearer from inhaling harmful substances and viruses from the outside, and to prevent droplets contained in the wearer's breath from scattering to the outside. In addition, various masks are folded into a flat shape when not in use, and are unfolded into a three-dimensional shape that can cover the nose and mouth when in use. In addition, in the past, patent documents 1 and 2 are known as inventions related to various masks that change from a flat shape to a three-dimensional shape when in use.

[0003] Patent document 1 describes a structure comprising: a center plate having an upper edge and a lower edge extending in a transverse direction and opposite to each other, and left and right side edges extending in a longitudinal direction and opposite to each other; and a first plate and a second plate, which are respectively connected to the upper edge and the lower edge of the center plate, a pair of first joining lines and a second joining line are joined, the second joining line joins the center plate and the second plate, and the two ends of the pair of first joining lines located at the upper edges are separated from each other.

[0004] Patent document 2 describes a horizontally foldable mask, which includes a main body and a harness fixed to both sides of the main body, and the main body in a folded state includes: a middle flap; an upper flap, whose upper end is bent downward as it goes from the center to the sides; a lower flap, whose lower end is bent upward as it goes from the center to the sides; a first pleated portion, which extends upward from the middle flap and is bent horizontally from the upper flap, and has a first middle bending line; and a second pleated portion, which extends downward from the middle flap and is bent horizontally from the lower flap, and has a second middle bending line.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent No. 4794291

[0008] Patent Document 2: Japanese Patent Application No. 2021-514427 Summary of the invention

[0009] Problem that the invention aims to solve

[0010] Here, the protrusions and depressions of the wearer's nose and mouth are mainly formed along the roughly vertical direction of the face. However, the pleats formed by the first joining line and the second joining line of Patent Document 1, and the pleats formed by the first middle bending line and the second middle bending line of Patent Document 2 are formed along the roughly horizontal direction of the mask body. Therefore, the masks described in Patent Documents 1 and 2 form a three-dimensional shape based on pleats in a roughly horizontal direction relative to the wearer's face. Therefore, the masks described in Patent Documents 1 and 2 have the following problems: it is difficult to form a three-dimensional shape corresponding to the shape of the wearer's face, and it is difficult to fit and stick to the face. In addition, in the inventions described in Patent Documents 1 and 2, the force applied by the ear rope in the direction of expansion to the left and right when worn is roughly along the direction of the pleats. Therefore, it is difficult for the force applied by the ear rope to the mask body to effectively act in order to form the mask body into a three-dimensional shape along the shape of the wearer's face. Therefore, the inventions described in Patent Documents 1 and 2 have the problem that an appropriate three-dimensional shape cannot be formed, and it is difficult to make the mask body fit closely around the nose and mouth of the wearer and maintain a good wearing state.

[0011] The present invention has been made in view of the above problems, and an object of the present invention is to provide a mask that can easily form a three-dimensional shape that can ensure good close contact with the wearer's face during use and that can easily maintain a good use state.

[0012] Solutions for solving problems

[0013] In order to achieve this problem, the present invention is characterized in that it is a mask comprising a mask main body exposed to the outside when worn on the wearer's face and ear ropes respectively arranged on both sides of the mask main body, wherein the mask main body is provided with: a central part, which covers the central part of the wearer's face in the left and right directions along the longitudinal direction; a folded part, which is connected to the side of the central part and folded along the longitudinal direction of the mask main body; and a side part, which is connected to the side of the folded part and covers the side of the wearer's face, the central part has a narrowing part whose width in the left and right directions decreases from the central part in the up and down direction toward the top and / or the bottom, and the mask main body is configured so that when the wearer is not using it, the folded part is folded and the mask main body becomes a flat shape, and when the wearer uses it, the folded part stands up due to the tension of the ear ropes to form a three-dimensional shape.

[0014] In a preferred technical solution of the present invention, there is provided: a first pleat fold line formed at the boundary between the folded portion and the central portion; and a second pleat fold line formed at the boundary between the folded portion and the side portion, and the upper end and / or the lower end of the first pleat fold line and the second pleat fold line are formed at approximately the same position.

[0015] In a preferred technical solution of the present invention, the central portion comprises a vertical portion which is at least located in the middle of the up-down direction and is arranged along a substantially vertical direction, and the narrowed portion which is arranged so as to be located above and / or below the vertical portion, and the ear rope is connected to the mask main body at a vertical position which is substantially equal to the boundary between the vertical portion and the narrowed portion and / or at a vertical position which is closer to the middle of the up-down direction than the boundary.

[0016] In a preferred technical solution of the present invention, the mounting portions of the ear ropes respectively mounted on the mask main body are connected to the mask main body at vertical positions where the narrowing portion is provided and at approximately equal distances from the upper and lower ends of the mask main body.

[0017] In a preferred embodiment of the present invention, a face contact piece is provided on the inner side of the mask body and contacts the face of the wearer.

[0018] Effects of the Invention

[0019] The mask of the present invention is provided with a central part, a folded part folded along the longitudinal direction of the mask body, and a side part connected to the side of the folded part, so as to form a three-dimensional shape along the longitudinal direction of the mask body. This three-dimensional shape can easily correspond to the concave and convex of the wearer's face, and can stably make the mask be worn in a state of being closely attached to the nose and mouth of the wearer. In addition, the central part is provided with a narrowing part whose width in the left and right directions is reduced from the central part in the up and down directions toward the top and / or the bottom, thereby, the folded part can be smoothly erected to form a three-dimensional shape by utilizing the force applied in the left and right directions of the mask body by the tension of the ear rope, etc., and the three-dimensional shape of the central part of the mask body is easily formed and maintained. Thus, it is possible to provide a mask that can easily form a three-dimensional shape that can ensure good close contact with the wearer's face when in use and that can easily maintain a good use state.

[0020] In addition, in the mask of the present invention, the upper end and / or lower end of the first pleat fold line formed at the boundary between the folded portion and the central portion and the second pleat fold line formed at the boundary between the folded portion and the side portion are formed at substantially the same position, so that even if the mask body, the upper end and the lower end of the folded portion are joined together including the pleat fold line, the joined state can be prevented from affecting the erection of the folded portion. Thus, a mask that can easily and appropriately form and maintain the three-dimensional shape of the mask body corresponding to the three-dimensional shape of the wearer's face and can be used while maintaining a comfortable wearing feeling can be provided.

[0021] In addition, in the mask of the present invention, the central part has a narrowing portion whose width in the left-right direction is reduced from the central part in the up-down direction toward the top and / or the bottom. Thus, the folded part can be smoothly erected to form a three-dimensional shape by utilizing the force applied in the left-right direction of the mask body by the tension of the ear rope, etc., and the three-dimensional shape of the central part of the mask body can be easily formed and maintained. In addition, the top end of the protrusion is formed to a predetermined length along the up-down direction. When the wearer uses it, the top end of the protrusion abuts against the central part or the folded part and pushes the central part from the inside to the outside, thereby making it easy to make the folded part erected to form a three-dimensional shape. Thus, it is further easy to form and maintain a shape corresponding to the three-dimensional shape of the wearer's face, ensuring the wearer's comfortable wearing feeling and further good adhesion to the wearer's face.

[0022] In addition, in the mask of the present invention, the mounting portions of the ear ropes that are mounted on the mask body are connected to the mask body at vertical positions where the narrowing portions are provided and at vertical positions that are approximately equidistant from the upper and lower ends of the mask body. Thus, the tension in the left-right direction of the ear ropes during use can be utilized to erect the folded portion of the mask body and maintain a stable three-dimensional shape.

[0023] In addition, the mask of the present invention has a face contact piece arranged on the inner side and in contact with the wearer's face, thereby making it easy to wear the mask tightly against the wearer's face, thereby reliably preventing the wearer from inhaling external harmful substances and viruses, and preventing droplets contained in the wearer's exhaled breath from scattering to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view showing the mask of this embodiment.

[0025] Figure 2 1 is a rear view of the mask.

[0026] Figure 3 1 is a top view showing the mask.

[0027] Figure 4 yes Figure 2 AA section view.

[0028] Figure 5 The mask of this embodiment is in a three-dimensional shape. Figure 2 Cross-sectional view at the position of AA.

[0029] Figure 6 This is a diagram showing a wearer wearing the mask as viewed from the front.

[0030] Figure 7This is a diagram showing a state in which a wearer is wearing the mask as viewed from an oblique direction.

[0031] Figure 8 The mask of this embodiment is in a three-dimensional shape. Figure 1 A cross-sectional view of the location of the BB.

[0032] Fig. 9 1 is a diagram showing a state when a wearer wears the mask according to this embodiment and is viewed from the back side.

[0033] Fig.10 The wearer is in a state where the mask of this embodiment is worn. Figure 6 A cross-sectional view of the location of the EE.

[0034] Fig.11 This is a schematic diagram showing an example of [first modified example] of the mask according to the present embodiment.

[0035] Fig.12 This is a schematic diagram showing an example of [first modified example] of the mask according to the present embodiment.

[0036] Fig.13 This is a schematic diagram showing an example of [first modified example] of the mask according to the present embodiment.

[0037] Fig.14 This is a schematic diagram showing an example of [Second Modification] of the mask according to the present embodiment.

[0038] Fig.15 This is a schematic diagram showing an example of [Second Modification] of the mask according to the present embodiment.

[0039] Fig.16 This is a schematic diagram showing an example of [Second Modification] of the mask according to the present embodiment.

[0040] Fig.17 This is a schematic diagram showing an example of [Second Modification] of the mask according to the present embodiment.

[0041] Fig.18 This is a schematic diagram showing an example of [third modified example] of the mask according to the present embodiment.

[0042] Fig.19 This is a schematic diagram showing an example of [third modified example] of the mask according to the present embodiment.

[0043] Fig. 20 This is a schematic diagram showing an example of [third modified example] of the mask according to the present embodiment. DETAILED DESCRIPTION

[0044] Below, use Figures 1 to 10A mask according to an embodiment of the present invention will be described.

[0045] [Overall structure of the mask]

[0046] Figure 1 and Figure 2 The mask 1 of the present embodiment shown is, for example, a household mask, which is mainly used to suppress the inhalation of particles such as pollen and dust, and to suppress the wearer 100 (refer to Figure 6 , Figure 7 ) is a so-called pleated nonwoven mask used for purposes such as preventing the scattering of droplets contained in the exhaled breath. However, the mask 1 of this embodiment can also be used as a nonwoven mask without pleats, and can also be a mask 1 used for various purposes such as cold prevention and medical use.

[0047] like Figure 1 and Figure 2 As shown, the mask 1 of this embodiment includes a mask body 2, a face contact piece 3 that abuts against the face of the wearer 100, a pair of left and right ear ropes 4, 4 respectively hung on the left and right ears of the wearer 100, and rope clips 5, 5 respectively provided on the ear ropes 4, 4.

[0048] [Overview of the mask body]

[0049] The mask body 2 is a breathable sheet material, and is formed of a material such as a nonwoven fabric that has breathability and can suppress the passage of particles such as pollen and dust or droplets contained in the breath of the wearer 100 .

[0050] like Figure 1 As shown, the mask body 2 is formed as an octagon as a whole when viewed from the front. This is a shape suitable for being in close contact with and covering the periphery of the nose and mouth of the wearer 100. That is, it is a shape roughly similar to the shape formed by connecting the parts that are formed by connecting the height positions with fewer bumps and depressions and approximately the same from the nose to the mouth (easy to be closely attached without gaps). By making the mask body 2 such a shape, a good wearing state can be ensured. However, as long as it is a shape that can be in close contact with and cover the periphery of the nose and mouth of the wearer 100, it can also be any front view shape other than a roughly octagon (for example, a roughly hexagon, a roughly elliptical shape, etc.).

[0051] For example, Figure 2 In the folded front view shown, the left-right length and the up-down length of the mask body 2 are respectively formed to be about 120 mm to 180 mm (this length varies depending on the size of the mask 1, etc.). However, the mask body 2 is not limited to this size as long as it is close to the face of the wearer 100 when used to achieve a good wearing state, dust prevention function, and droplet prevention function.

[0052] The mask body 2 is stacked in multiple layers. Specifically, for example, a pre-filter, a main filter, and a water-absorbing filter (none of which are shown) are stacked in order from the outside to the inside. The pre-filter absorbs moisture and has a coarse fiber diameter to filter larger dust for a beautiful appearance. The main filter has a fine fiber diameter to filter smaller dust. The water-absorbing filter mainly absorbs moisture from the wearer's 100 exhaled air. In addition, there is no particular limitation on the material of the mask body 2 as long as it is soft and bendable, can achieve the introduction of the wearer's 100 inhaled air and the discharge of the exhaled air, and functions as a filter that can filter inhaled air, external pollen, dust, etc.

[0053] [Details of the mask body]

[0054] The mask body 2 includes a central portion 6, and left and right portions ( Figure 1 and Figure 3 The mask body 2 includes a pair of folded portions 7, 7 on the left and right sides of the mask body 2. ...

[0055] The central portion 6 is configured to extend in the vertical direction ( Figure 1 and Figure 2 In the up and down direction. The same in this specification) covers the central part of the wearer's 100 face in the left and right directions.

[0056] like Figure 1 As shown, the central portion 6 is formed into a substantially octagonal shape when viewed from the front, and includes a pair of vertical portions 9, 9, upper narrowed portions 10, 10 as "narrowed portions" respectively disposed above the vertical portions 9, 9, lower narrowed portions 11, 11 as "narrowed portions" respectively disposed below the vertical portions 9, 9, upper end portions 12, and lower end portions 13. The length in the left-right direction of the vertical portions 9, 9 of the central portion 6 is formed to be approximately 40 mm to 100 mm. In addition, the aspect ratio of the central portion 6 is preferably formed to be approximately 1.5 to 3.3:1, but is not limited to this range as long as a good wearing state, dustproof function, and splash prevention function are achieved.

[0057] The vertical portions 9 , 9 are formed parallel to the vertical direction at the center portion in the vertical direction in a front view.

[0058] The upper narrowed portions 10 , 10 are formed so that the size in the left-right direction gradually decreases toward the upper side in the up-down direction.

[0059] The lower narrowed portions 11 , 11 are formed so that the size in the left-right direction gradually decreases toward the lower side in the up-down direction.

[0060] The upper end portion 12 and the lower end portion 13 are formed in a shape along the upper end and the lower end of the mask body 2. The upper end portion 12 is formed in a curved shape convex upward, and the lower end portion 13 is formed in a curved shape convex downward.

[0061] The folded parts 7, 7 are connected to the sides of the central part 6 respectively. Figure 3 As shown, when not in use, the folding parts 7, 7 are folded along the longitudinal direction of the mask body 2, as shown in FIG. Figure 7 As shown, when in use, the folded parts 7, 7 stand up to form the mask body 2 and the face contact piece 3 into a three-dimensional shape.

[0062] like Figure 3 As shown, the side portions 8, 8 are connected to the sides of the folding portions 7, 7. Figure 6 , Figure 7 As shown, the side portions 8 , 8 are configured to cover the sides of the face of the wearer 100 .

[0063] like Figure 4 As shown, first pleat fold lines 14, 14 are formed as mountain fold lines when viewed from the front side of the mask body 2 at the boundaries between the central portion 6 and each folded portion 7, 7. The first pleat fold lines 14, 14 are formed as fold lines in a substantially vertical direction at the position of the vertical portion 9 of the central portion 6, and are formed in a shape inclined upward and downward in the narrowing direction at the positions of the upper narrowing portion 10 and the lower narrowing portion 11, respectively.

[0064] like Figure 4 As shown, second pleat fold lines 15, 15 are formed as valley fold lines when viewed from the front side of the mask body 2 at the boundaries between the folded portions 7, 7 and the side portions 8, 8. The second pleat fold lines 15, 15 are formed in a substantially vertical straight line shape along the up-down direction.

[0065] like Figure 1 and Figure 7 As shown, the upper ends of the first gather fold line 14 and the second gather fold line 15 are joined at a joining portion 16 at substantially the same position, and the lower ends are also joined at a joining portion 17 at substantially the same position.

[0066] [Structure of upper narrowing portion, lower narrowing portion, first pleat fold line, and second pleat fold line]

[0067] In this embodiment, the mask body 2 and the face contact member 3 are welded at the upper end 12 and the lower end 13 of the mask 1. In addition, at the upper narrowed portions 10, 10 and the lower narrowed portions 11, 11, the upper ends of the first pleat fold lines 14, 14 and the lower ends of the second pleat fold lines 15, 15 are closer to each other or aligned with each other than at the center in the vertical direction.

[0068] If the upper narrowing parts 10, 10 and the lower narrowing parts 11, 11 are not present, the upper ends and lower ends of the first pleat fold lines 14, 14 and the second pleat fold lines 15, 15 will be in a state of being separated from each other as in the central part in the vertical direction. Furthermore, the portion of the mask 1 that is folded downward from a position above the upper end 12 and the portion that is folded upward from a position below the lower end 13 are welded at the upper end 12 and the lower end 13. Therefore, the portion of the folded part 7 that is folded in and welded at the upper end 12 and the lower end 13 cannot be opened when the mask body 2 is formed into a three-dimensional shape. This causes unwanted wrinkles and unevenness to be generated near the upper end 12 and the lower end 13 of the central part 6 when the folded part 7 is raised. Therefore, it is difficult to form and maintain a shape corresponding to the three-dimensional shape of the face of the wearer 100, which may cause discomfort when the wearer 100 wears it and it is difficult to ensure tightness to the face of the wearer 100.

[0069] On the other hand, in the present embodiment, the first pleat fold lines 14, 14 and the second pleat fold lines 15, 15 are close to each other at the upper end 12 and the lower end 13 by the upper narrowing parts 10, 10 and the lower narrowing parts 11, 11. Therefore, the vicinity of the upper end 12 and the lower end 13 of the folded part 7 can also stand up without being affected by the welding. Furthermore, even if there is a part that is folded in from a position above the upper end 12 and a position below the lower end 13 and welded at the upper end 12 and the lower end 13, it will not affect the standing of the folded part 7. Therefore, in the present embodiment, it is possible to provide a mask 1 that can easily and appropriately form and maintain the three-dimensional shape of the mask body 2 corresponding to the three-dimensional shape of the face of the wearer 100 and can be used while maintaining a comfortable wearing feeling.

[0070] However, as long as the above-mentioned effect of maintaining a comfortable wearing feeling is achieved, it is also possible to have only one of the upper narrowing portions 10, 10 and the lower narrowing portions 11, 11, or only one of the first pleat fold lines 14, 14 and the second pleat fold lines 15, 15 that are close to or consistent at the upper end portion 12 and the lower end portion 13.

[0071] Furthermore, contrary to the present embodiment, the first gather fold lines 14, 14 may be formed as valley fold lines, and the second gather fold lines may be formed as mountain fold lines.

[0072] [Overview of face contact parts]

[0073] Figure 2The face contact piece 3 shown is provided on the inner side of the mask body 2, that is, on the back side, at a position in contact with the face of the wearer 100. For the face contact piece 3, for example, a member having both high flexibility and high shape recovery properties is used, which is obtained by attaching non-woven fabric, pulp, etc. to a non-air-permeable foamed resin material. In this embodiment, the foaming ratio of the face contact piece 3 is about 20 to 50.

[0074] like Figure 2 As shown, the outer peripheral portion of the face contact member 3 is formed into a substantially hexagonal shape. Figure 2 In the rear view of the mask 1 shown, the length of the face contact piece 3 in the left-right direction (the longest part) is formed to be about 105 mm, and the length in the vertical direction (the longest part) is formed to be about 150 mm. Figure 1 The length C shown is formed to be about 40 mm, and the vertical length of the convex portion below the face contact member 3 ( Figure 1 The length D) shown is formed to be about 40 mm. However, these lengths vary depending on the size of the mask 1. For example, the vertical length (about 150 mm) of the above-mentioned face contact member 3 is formed to be about 120 mm in the vertical direction of the M (medium) size, and the vertical length of the S (small) size is formed to be about 180 mm in the vertical direction of the L (large) size.

[0075] In addition, the face contact piece 3 is not limited to the above-mentioned cases and can be of any size and shape as long as it is in close contact with the face of the wearer 100 when used to achieve a good wearing state, dust prevention function, and splash prevention function.

[0076] The shape and size of the upper and lower ends of the face contact piece 3 are substantially the same as the shape and size of the position close to the central portion 6 from the central portion 6 to the side portion 8 of the mask body 2. In addition, the upper and lower ends of the face contact piece 3 are joined to the upper and lower ends of the position close to the central portion 6 from the central portion 6 to the side portion 8 of the mask body 2 by welding or the like based on welding processing or the like. In addition, this joining is not limited to only welding processing, and any method such as bonding, sewing, etc. may be used.

[0077] like Figure 2 As shown in FIG. 1 , a ring-shaped annular peripheral portion 19 as a “peripheral portion” is formed on the face contact member 3 . An opening 18 is formed in the inner portion of the annular peripheral portion 19 .

[0078] [Details of face contact member (protrusion, protrusion, cutout, etc.)]

[0079] like Figure 2As shown, a pair of protrusions 20, 20 are protruding from the annular peripheral portion 19 of the face contact member 3, which are located approximately in the middle in the vertical direction and protrude from both sides toward the center of the opening 18. Each protrusion 20, 20 is formed into a substantially rectangular shape with a length of about 25 mm or more in the left-right direction. Figure 2 As shown, in the folded state, the top ends of the protrusions 20, 20 (referring to the right end of the protrusion 20 on the left side and the left end of the protrusion 20 on the right side) are close to each other with almost no gap.

[0080] The left-right length of the protrusions 20, 20 is formed to be greater than the length of the folded portion of the folded portion 7 of the mask body 2 (the height in the upright state when in use). Figure 5 As shown, the length is such that when the protrusions 20, 20 are bent toward the surface direction (towards the main body 2) from the base end (referring to the left end of the protrusion 20 on the left and the right end of the protrusion 20 on the right), they abut against the upright folded portion 7 of the main body 2.

[0081] However, the length of the protrusion 20 can be longer than the above length (for example, the length at which the top end abuts the central portion 6), or shorter than the above length (for example, the length at which the top end roughly overlaps the second pleat fold line 15), as long as the folding portion 7 can be stably maintained in an upright state.

[0082] The vertical length of the protrusions 20, 20 is the length that can form a shape in which the central portion of each of the protrusions 20, 20 in the vertical direction is bent outward in an arc manner compared to the upper and lower sides when the protrusions 20, 20 are erected in the direction of the mask body 2. The vertical length of the protrusions 20, 20 in the present embodiment is formed to be about 54 mm or more, and preferably about 30 mm or more. This is to fix the protrusions 20, 20 in an erected state by bending the central portion of the protrusions 20, 20 in the vertical direction outward.

[0083] Air holes 21, 21 are formed in the substantially central portion of each protrusion 20, 20. The air holes 21, 21 are formed in a substantially rectangular shape, for example, with a length of about 10 mm in the left-right direction and a length of about 20 to 23 mm in the upper-lower direction, so as to reduce the contact area between the mask body 2 and the face contact member 3 and allow air to pass through the surface and back of the protrusions 20, 20. The air holes 21, 21 may be formed in any size and shape as long as the protrusions 20, 20 can be ventilated on the surface and back during use and the wearer 100 can be well breathed.

[0084] like Figure 2As shown in the figure, a jaw protrusion 22 as a "protrusion" protruding upward from the center in the left-right direction is protruded at the lower part of the annular peripheral portion 19 of the face contact member 3. The upper edge of the jaw protrusion 22 is formed into a generally arc shape protruding upward. However, the shape of the jaw protrusion 22 may be any shape other than the above (e.g., a generally rectangular or triangular shape with the peripheral portion of the upper end protruding upward) as long as it is a shape that stably contacts the jaw of the wearer 100 when worn.

[0085] A pair of cutouts 23, 23 are provided at the base ends (referring to the lower ends) located on both sides of the jaw protrusion 22. The cutouts 23, 23 are formed into a shape obtained by cutting obliquely downward on the lower side of the annular peripheral portion 19 on the extension line of the jaw protrusion 22 that protrudes upward in a roughly arc shape. As a result, the cutouts 23, 23 on both sides are formed into a shape that widens downward. In the present embodiment, the width of the lower part of the annular peripheral portion 19 of the face contact piece 3 is formed to be, for example, about 25 mm, and the cutouts 23, 23 are formed to be, for example, a cutout with a width of about 7 mm. The shape and size of the cutout 23 can be any as long as the jaw protrusion 22 can fit and abut against the jaw of the wearer 100 and prevent leakage of external air and exhaled breath.

[0086] By providing the cutouts 23, 23, it is possible to suppress the force caused by the shape change of the side and upper parts of the annular peripheral portion 19, while changing the shape of the jaw protrusion 22. Therefore, the jaw protrusion 22 can be easily bent to fit the jaw of the wearer 100 (refer to [State during use (2. Bending of the face contact member 3 and wearing on the face)] described later).

[0087] In addition, the cutout portions 23, 23 may be formed into any shape (for example, a shape obtained by partially recessing the annular peripheral portion 19 into a curved shape convex downward, a roughly triangular shape convex downward, a roughly rectangular shape, etc.) as long as it is convenient for bending the jaw protrusion 22 into a three-dimensional shape along the jaw of the wearer 100 during use so that the jaw protrusion 22 is in close contact with the jaw.

[0088] The cutouts 23, 23 are arranged at positions roughly overlapping with the folding parts 7, 7 or the side parts 8, 8 of the mask body 2, and are configured to be able to greatly bend the jaw protrusion 22 into a three-dimensional shape along the shape of the jaw (for example, a shape in which the top end of the jaw protrusion 22 is bent toward the mask body 2 side) at a position closer to the left-right center than the erected folding parts 7, 7 during use. The cutouts 23, 23 of this embodiment are arranged at positions roughly overlapping with the second pleat fold line 15 of the mask body 2, and the length from the cutout 23 to the top end of the jaw protrusion 22 in the vertical direction is formed to be about 10 mm. However, as long as the above-mentioned purpose is met, the positions of the cutouts 23, 23 may not be consistent with the second pleat fold line 15.

[0089] like Figure 2 As shown, a pair of nose bridge protrusions 24, 24 are protruded from the vicinity of the center in the left-right direction toward obliquely downward at the upper part of the annular peripheral edge 19 of the face contact member 3. The nose bridge protrusions 24, 24 are roughly rectangular, for example, the length of the short side is formed to be about 10 mm, and the length of the long side is formed to be about 25 mm, and when used, they are in close contact with the two sides of the nose of the wearer 100. However, the nose bridge protrusions 24, 24 can be in any position, size, and shape as long as they are in close contact with the two sides of the nose of the wearer 100 when used.

[0090] like Figure 1 As shown, a band-shaped nose clip 25 is provided along the upper end 12 of the central portion 6 in the portion sandwiched by the mask body 2 and the face contact member 3. The nose clip 25 is made of a material such as stretched polyethylene that has high rigidity and can maintain its shape in a bent state.

[0091] The length of the nose clip 25 in the longitudinal direction is formed to be substantially the same as the left-right size of the upper end portion 12. When worn, the nose clip 25 is bent along the shape of the nose of the wearer 100 so that the mask body 2 and the face contact member 3 are closely attached to the nose of the wearer 100. In addition, the arrangement position and size of the nose clip 25 are not limited to the above as long as it properly performs its function.

[0092] [Ear strap]

[0093] like Figure 1 and Figure 2 As shown, the ear ropes 4, 4 are connected to both sides of the mask body 2 in the left and right directions. The ear ropes 4, 4 are respectively formed of elastic bands that can be elastically stretched and contracted, and are formed to a length that allows the mask 1 to fit the face of the wearer 100, for example, a length of 200 mm. However, the length of the ear rope 4 can be longer or shorter than the aforementioned length. In addition, the ear ropes 4, 4 can also be formed of a known elastic material such as non-woven fabric, woven fabric, plastic film, etc.

[0094] [Connection position of ear straps and mask body]

[0095] Each ear strap 4, 4 is connected to the mask body 2 at the vertical position of the boundary between the vertical parts 9, 9 and the upper narrowed parts 10, 10 of the mask body 2 and the vertical position of the boundary between the vertical parts 9, 9 and the lower narrowed parts 11, 11, and at a vertical position that is approximately equal to the distance from the upper end and the lower end of the mask body 2. Specifically, both the left ear strap 4 and the right ear strap 4 are connected to the mask body 2 at the vertical position of approximately 1 / 3 from the upper end of the mask body 2 and the vertical position of approximately 1 / 3 from the lower end of the mask body 2.

[0096] By connecting the ear straps 4, 4 to the mask body 2 at this vertical position, the folded portion 7 of the mask body 2 can be erected by the tension in the horizontal direction during use, and the three-dimensional shape can be stably maintained.

[0097] That is, since both the left ear strap 4 and the right ear strap 4 are connected to the upper and lower sides of the mask body 2 at their ends, a force that brings the mask body 2 closer in the vertical direction acts between the connection positions of the upper and lower sides. The force that brings the mask body 2 closer in the vertical direction acts as a strong force that makes the folded parts 7, 7 adjacent to the vertical part 9 of the central part 6 stand up forward. Therefore, when using, the vertical part 9 of the folded part 7 can be reliably and stably stood up.

[0098] On the other hand, for both the left ear strap 4 and the right ear strap 4, the force acting to raise the folded portions 7, 7 is weaker than that between the connection positions, for the portion above the connection position with the upper side of the mask body 2 and the portion below the connection position with the lower side of the mask body 2.

[0099] In addition, in the present embodiment, the upper and lower portions of the folded portion 7 where the ear strings 4, 4 are connected to the mask body 2 are adjacent to the upper narrowing portion 10 and the lower narrowing portion 11 of the central portion 6. Furthermore, at the upper and lower portions where the ear strings 4, 4 are connected to the mask body 2, and at the connection positions with the upper end 12 and the lower end 13, the first pleat fold lines 14, 14 and the second pleat fold lines 15, 15 are joined to form the joints 16, 16 and the joints 17, 17. Therefore, the width of the folded portion 7 is smaller than that of the portion between the connection positions, and the force required for erection is also smaller. Therefore, the portion of the folded portion 7 adjacent to the upper narrowing portion 10 and the lower narrowing portion 11 can be reliably and stably erected even with a smaller force. Therefore, the three-dimensional shape of the mask body 2 during use can be maintained in a state that can appropriately achieve the purpose of the mask 1, and the state in which the mask body 2 has the three-dimensional shape can be stably maintained.

[0100] In addition, as long as the purpose of stably maintaining the state of the mask body 2 in a three-dimensional shape is met, the connection position of the ear ropes 4, 4 and the mask body 2 can also be any position other than the above-mentioned position. For example, only the upper end or only the lower end of the ear ropes 4, 4 can be connected to the mask body 2 at a position in the vertical direction approximately 1 / 3 from the upper end or the lower end, or the ear ropes 4, 4 can be connected to the mask body 2 at a position closer to the center in the vertical direction than the position approximately 1 / 3 from the upper end or the lower end, for example, at a position in the vertical direction approximately 2 / 5 from the upper end or the lower end. In addition, it can also be connected to a position closer to the center in the vertical direction than the boundary between the vertical portion 9 and the upper narrowing portion 10, and the boundary between the vertical portion 9 and the lower narrowing portion 11, for example, any position corresponding to the position where the vertical portions 9, 9 are formed on the mask body 2.

[0101] [Rope clip]

[0102] like Figure 1 and Figure 2 As shown, a cord clip 5 is connected to each ear cord 4. The cord clip 5 is formed into a roughly ring-shaped shape with a narrowed central portion using a material with high rigidity such as a hard resin. The cord clips 5, 5 are used to insert the other cord clip into the inner part of the ring-shaped portion of one side and lock it, and adjust the length of the ear cord 4 for wearing. In addition, the cord clips 5, 5 may not be provided.

[0103] In addition, instead of the left and right ear strings 4, 4 of the present embodiment, a headband string connected to the left and right and forming a substantially annular shape with the mask body 2 may be provided on the mask 1. In this case, the string is hung from the side of the wearer's head to the back of the head for use.

[0104] [State when not in use and state when in use]

[0105] Next, the non-use state and the use state of the mask of this embodiment are described.

[0106] [State when not in use]

[0107] like Figure 1 and Figure 4 As shown, in the state of the mask 1 of this embodiment when not in use, the folding portion 7 of the mask body 2 is folded, and further, as shown in FIG. Figure 2 As shown, the protrusions 20, 20, the jaw protrusion 22, and the nose bridge protrusions 24, 24 of the face contact member 3 are formed in a flat shape substantially in the same plane as the annular peripheral portion 19. As a result, the mask 1 is not bulky when packaged, and is therefore extremely easy to transport and store.

[0108] [State during use (1. Formation of three-dimensional shape)]

[0109] Next, when using the mask 1, the wearer 100 pulls the ear straps 4, 4 in the left-right direction, or the wearer 100 makes the folded parts 7, 7 stand up forward (toward the mask body 2. The same applies in this specification), thereby forming a state in which the folded parts 7, 7 stand up approximately vertically in front of the mask body 2. Figure 5 and Figure 7 As shown, a three-dimensional shape is formed in which the central portion 6 protrudes forward more than the side portions 8.

[0110] In this state, if the protrusions 20, 20 of the face contact member 3 are folded forward, the protrusions 20, 20 push the folded portions 7, 7 in the direction of standing up the folded portions 7, 7, and the folded portions 7 can be stably maintained in the standing state (see Figure 5 and Figure 8 ).at this time, Fig. 9 A force in the direction indicated by the arrow G acts on the substantially central portion of the protrusions 20, 20 in the vertical direction. Fig. 9 and Fig.10 As shown in the figure, curved portions 27, 27 that bulge in the left-right direction are formed at the substantially central portion in the up-down direction of the protrusions 20, 20. By forming the curved portions 27, the protrusions 20, 20 can be stably maintained in an upright state. In addition, the protrusions 20, 20 that are erected can be prevented from falling down or being crushed during use, and the three-dimensional shape of the mask body 2 can be stably maintained.

[0111] Furthermore, in this state, if the wearer 100 places the nose and mouth inside the opening 18 of the face contact part 3 of the mask 1, and the annular peripheral edge 19 is in contact with the nose and mouth, and then the ear straps 4, 4 are hung on the ears, the nose bridge protrusions 24, 24 are in contact with the two sides of the nose, and the jaw protrusions 22 are in contact with the jaw. At this time, if the length of the ear straps 4, 4 is too short, the other cord clip 5 can be inserted into the annular portion of one cord clip 5 and locked, and the length of the ear straps 4 can be adjusted to wear the mask.

[0112] [State during use (2. Bending of the face contact member 3 and wearing on the face)]

[0113] When a force in the left-right direction is applied to the face contact part 3 due to the tension of the ear straps 4, 4, etc., the force acts as a force in a direction to bring the connection parts connected to the mask body 2 on the upper and lower sides of each ear strap 4, 4 of the face contact part 3 closer together. Fig. 9 and Fig.10 The curved portions 27 and 27 formed on the raised protrusion 20 of the face contact member 3 shown in the figure act to suppress the raised protrusion 20 from falling down or being crushed.

[0114] In addition, the force in the left-right direction applied by the ear straps 4 and 4 to the face contact member 3 causes the annular peripheral edge portion 19 on the lower side of the face contact member 3 to move backward ( Figure 8 The side of the wearer's 100 that contacts the face of the wearer 100 as indicated by the arrow F is bulged. If this force is directly applied to the jaw protrusion 22, as shown in FIG. Figure 8 As shown, the jaw protrusion 22 forms a rearward side ( Figure 8 The bulging portion 26 bulges outwardly (on the right side in the figure).

[0115] On the other hand, in this embodiment, cutouts 23, 23 are formed at both lower end portions of the jaw protrusion 22. Fig.10 As shown, the jaw 28 of the wearer 100 abuts against the jaw protrusion 22. And, as Fig.10 As shown by the arrow H, the jaw 28 applies pressure to the jaw protrusion 22 to the front side ( Fig.10 In addition, due to the presence of the cutouts 23, 23, the jaw protrusion 22 is provided with a curved portion 29 that is bent forward by the pressing force of the jaw 28 while the annular peripheral portion 19 on both sides of the jaw protrusion 22 is kept bent backward. Thus, the annular peripheral portion 19 can be brought into contact with the wearer's 100 mouth and the like, and the jaw protrusion 22 can be brought into contact with the wearer's 100 jaw 28 in a well-fitting state.

[0116] Furthermore, the jaw protrusion 22 is flexibly deformed according to the size of the face of the wearer 100 and the position of the jaw to abut against the jaw 28. Therefore, if the face of the wearer 100 is large, Fig.10 As shown in FIG. 1 , substantially the entire surface of the jaw 28 of the wearer 100 abuts against the jaw protrusion 22, and a large curved portion 29 is formed on the jaw protrusion 22. On the other hand, if the wearer 100 has a small face, the curved portion 29 of the jaw protrusion 22 is almost not formed, but only Fig.10 The top end 30 of the jaw protrusion 22 shown in the figure abuts against the jaw 28 of the wearer 100. In this way, in the mask 1 of this embodiment, regardless of the size of the face of the wearer 100 and the difference in the contact position of the face with respect to the mask 1, the face contact member 3 can be made to fit closely to the face of the wearer 100 by changing the abutment position of the jaw 28 of the wearer 100 with respect to the jaw protrusion 22 and the formation state of the curved portion 29, so that the wearer can wear the mask in a good wearing state.

[0117] Furthermore, when the nose clip 25 is folded in a substantially V-shape in the front-back direction along the raised shape of the nose of the wearer 100 , the upper side of the mask body 2 is in close contact with the nose of the wearer 100 .

[0118] As described above, the mask 1 of this embodiment is worn in a state where the mask 1 forms a three-dimensional shape in close contact with the face of the wearer 100 and covers the nose and mouth of the wearer 100 .

[0119] Here, in the mask 1 of this embodiment, the first pleat fold line 14 and the second pleat fold line 15 of the mask body 2 are located on both sides of the nose and mouth of the wearer 100 and are formed in a substantially vertical direction, and the folded portion 7 stands up in the vertical direction of the face of the wearer 100. In addition, the protrusions 20, 20, the jaw protrusion 22, and the nose bridge protrusions 24, 24 of the face contact member 3 stand up forward to form a three-dimensional shape, and the three-dimensional shape of the mask body 2 is maintained. Therefore, the three-dimensional shape of the mask body 2 when in use is formed along the substantially vertical direction along which the three-dimensional shape of the face of the wearer 100 (the direction of the nose bridge, the direction of the nasolabial folds around the mouth, etc.) is formed.

[0120] Therefore, even if the wearer 100 speaks or moves facial muscles while wearing the mask, the three-dimensional shape of the mask body 2 can be prevented from hindering the movement of facial muscles. Furthermore, the three-dimensional shape formed by the mask body 2 and the face contact member 3 continuously forms a state where the mask 1 is closely attached to the nose and mouth of the wearer 100. Thus, the mask 1 can be kept in a good and comfortable wearing state for the wearer 100.

[0121] Furthermore, the folded portion 7 of the mask body 2 can be erected by utilizing the tension of the ear straps 4, 4 in the left-right direction, thereby maintaining a stable three-dimensional shape (see [Connection position of ear straps and mask body] described above).

[0122] [Effects]

[0123] As described above, in this embodiment, a three-dimensional shape along the longitudinal direction of the mask body 2 is formed by providing the central portion 6, the folded portions 7, 7 folded along the longitudinal direction of the mask body 2, and the side portions 8, 8 connected to the sides of the folded portions 7, 7. This three-dimensional shape can easily correspond to the unevenness of the face of the wearer 100, and the mask 1 can be stably worn in a state of being closely attached to the nose and mouth of the wearer 100. In addition, the central portion 6 is provided with the upper narrowing portions 10, 10 and the lower narrowing portions 11, 11 whose width in the left and right directions is reduced from the central portion in the up-down direction toward the upper and lower sides, thereby, the folded portions 7, 7 can be smoothly erected to form a three-dimensional shape by the force applied in the left-right direction of the mask body 2 by the tension of the ear straps 4, 4, etc., and the three-dimensional shape of the central portion 6 of the mask body 2 is easily formed and maintained. As a result, it is possible to provide a mask 1 that can easily form a three-dimensional shape that can ensure good close contact with the face of the wearer 100 when used and that can easily maintain a good use state.

[0124] In addition, in the present embodiment, the upper and lower ends of the first pleat fold lines 14 formed at the boundary between the folded parts 7, 7 and the central part 6 and the second pleat fold lines 15, 15 formed at the boundary between the folded parts 7, 7 and the side parts 8, 8 are formed as joints 16, 16 and / or joints 17, 17 at substantially the same position, so that even if the mask body 2, the upper end 12 and the lower end 13 of the folded parts 7, 7 are joined together including the first pleat fold lines 14, 14 and the second pleat fold lines 15, 15, it is possible to suppress the joined state from affecting the standing of the folded parts 7, 7. Thus, it is possible to provide a mask 1 that can easily and appropriately form and maintain the three-dimensional shape of the mask body 2 corresponding to the three-dimensional shape of the face of the wearer 100 and can be used while maintaining a comfortable wearing feeling.

[0125] In addition, in the present embodiment, the central portion 6 has upper narrowing portions 10, 10 and lower narrowing portions 11, 11 whose width in the left-right direction decreases from the central portion in the up-down direction toward the upper and / or lower sides, so that when a force is applied to the left-right direction of the mask body 2 by the tension of the ear straps 4, 4, etc., the upper narrowing portions 10, 10 and the lower narrowing portions 11, 11 can be erected with a small force. In addition, the folded portions 7, 7 can be erected smoothly to form a three-dimensional shape, and the three-dimensional shape of the central portion of the mask body 2 is easily formed and maintained. In addition, the top end of the protrusions 20, 20 is formed to a predetermined length along the up-down direction. When the wearer 100 uses it, the top end of the protrusions 20, 20 abuts against the central portion 6 or the folded portions 7, 7 to push the central portion 6 from the inside to the outside, so that the folded portions 7, 7 can be easily erected to form a three-dimensional shape. As a result, it is possible to more easily form and maintain a shape corresponding to the three-dimensional shape of the wearer's 100 face, thereby ensuring a comfortable wearing feeling for the wearer 100 and better adhesion to the wearer's 100 face.

[0126] In addition, in the present embodiment, the ear straps 4, 4 are respectively connected to the mask body 2 at the upper position where the upper narrowing portions 10, 10 are provided, and at the lower position where the lower narrowing portions 11, 11 are provided, and at the upper and lower positions where the distances from the upper end portion 12 and the lower end portion 13 of the mask body 2 are approximately equal. Thus, the tension in the left-right direction of the ear straps 4, 4 during use can be utilized to erect the folded portions 7, 8 of the mask body 2 and maintain the three-dimensional shape stably.

[0127] In addition, in this embodiment, by providing a face contact piece 3 arranged on the inner side and in contact with the face of the wearer 100, the mask 1 can be easily worn in close contact with the face of the wearer 100, thereby reliably preventing the wearer 100 from inhaling external harmful substances and viruses, and preventing droplets contained in the exhaled breath of the wearer 100 from scattering to the outside.

[0128] [Variation 1: Structure of the central portion]

[0129] In the present embodiment, the front view shape of the central portion 6 of the mask body 2 is formed into a substantially octagonal shape that is bilaterally symmetrical and vertically substantially symmetrical, but the front view shape of the central portion 6 is not limited thereto.

[0130] For example, you can also Fig.11As schematically shown in the mask 1A, the upper narrowing parts 10, 10 of the central part 6 are formed to be longer, and the lower narrowing parts 11, 11 are formed to be shorter. In addition, on the contrary, the upper narrowing parts 10, 10 may be formed to be shorter, and the lower narrowing parts 11, 11 may be formed to be longer. In addition, the central part 6 may be a structure without the lower narrowing parts 11, 11 (a structure composed of the upper narrowing parts 10, 10, the vertical parts 9, 9, the upper end part 12, and the lower end part 13), or a structure without the upper narrowing parts 10, 10 (a structure composed of the lower narrowing parts 11, 11, the vertical parts 9, 9, the upper end part 12, and the lower end part 13).

[0131] In addition, the central portion 6 may be formed in a front view shape other than a substantially octagonal shape. Specifically, for example, the central portion 6 may be formed of only the upper narrowed portions 10, 10 and the lower narrowed portions 11, 11 without forming the vertical portions 9, 9, so that the central portion 6 may be formed in a substantially hexagonal shape in front view, such as Fig.12 The mask 1B schematically shows a roughly rhombus shape (a shape where the upper end 12 and the lower end 13 are pointed). In addition, the main view shape may be a roughly decagonal shape, a roughly dodecagonal shape, or a roughly triangular shape, a roughly trapezoidal shape, or a shape that is asymmetric in the upper and lower directions. Furthermore, the upper narrowing portions 10, 10 and the lower narrowing portions 11, 11 may be formed into roughly curved shapes, and the main view shape of the central portion 6 may be roughly elliptical, or a portion of the sides of the various shapes mentioned above may be roughly arc-shaped. In addition, Fig.13 of Figure 1 As schematically shown in C, neither the upper narrowing portions 10, 10 nor the lower narrowing portions 11, 11 are provided, and the structure is provided with vertical portions 9, 9, an upper end portion 12, and a lower end portion 13 (although not shown in the figure, the upper end portion 12 and the lower end portion 13 can also be made roughly horizontal and the central portion 6 can be made roughly rectangular.).

[0132] In addition, the ratio of the length in the vertical direction to the length in the horizontal direction of the front view of the central portion 6 can be arbitrary. For example, the length in the vertical direction can be 150 mm and the length in the horizontal direction can be 45 mm (aspect ratio 3.3:1), or the length in the vertical direction can be 150 mm and the length in the horizontal direction can be 60 mm (aspect ratio 2.5:1), or similarly, the aspect ratio can be 2.1:1, 1.9:1, 1.5:1, etc., etc.

[0133] Although not shown, the structures of the upper narrowed portions 10, 10, the lower narrowed portions 11, 11, the first pleat fold lines 14, 14, and the second pleat fold lines 15, 15 may be similar to the structure of the central portion 6. Figures 1 to 10For example, the first pleat fold line 14 and the second pleat fold line 15 can also be provided in a structure where the central portion 6 does not have the lower narrowing portions 11, 11 (see Figure 4 ) is not consistent at the lower end portion 13, or conversely, the central portion 6 is configured to have a structure without the upper narrowing portions 10, 10, and the first pleat fold line 14 and the second pleat fold line 15 are set (refer to Figure 4 ) has an inconsistent structure at the upper end 12.

[0134] [Modification 2: Structure of protrusion]

[0135] In the present embodiment, the protrusions 20 , 20 are located substantially in the center of the face contact member 3 in the vertical direction and are formed in a substantially rectangular shape in a front view, but the present invention is not limited thereto.

[0136] For example, the upper and lower sides of each protrusion 20, 20 may be formed into a substantially arc shape bulging in the vertical direction at the center in the left-right direction, or Fig.14 As shown in the schematic diagram of the mask 1D, the protrusions 20 and 20 may be formed into a substantially arc shape approaching in the vertical direction. In addition, the protrusions 20 and 20 may be expanded or reduced in size in the vertical direction from the base end to the top end, or may be chamfered at the top end. In addition, the top end of the protrusions 20 and 20 may not be linear in the vertical direction (for example, it may be as Fig.15 As schematically shown in the mask 1E, the top ends 20a, 20a are serrated. ).

[0137] In addition, if Fig.16 As shown in the schematic diagram of the mask 1F, the protrusions 20, 20 may be arranged above or below the approximately central portion in the vertical direction, or may be in an asymmetric shape (e.g., an asymmetric approximately trapezoidal shape). In addition, the protrusions 20, 20 are not limited to being provided with one protrusion on each side, but may be provided with two or more protrusions on each side. In addition, the top ends of the protrusions 20, 20 on the left and right sides do not need to be close to each other, and may be provided as Fig.17 As schematically shown in the mask 1G, the distal ends 20a, 20a of the left and right protrusions 20, 20 are separated from each other.

[0138] [Modification 3: Structure of jaw protrusion and cutout]

[0139] In addition, in the present embodiment, the upper edge portion of the jaw protrusion 22 is formed in a substantially arc shape that protrudes upward, but the present invention is not limited to this.

[0140] For example, the jaw protrusion 22 may be formed in a generally rectangular, triangular, or pentagonal shape that protrudes upward. In addition, the jaw protrusion 22 may be formed in a generally arc shape on the extension line of the annular peripheral portion 19, or may be formed in a shape in which the upper end portion follows the curvature of the jaw (e.g., a generally arc shape that protrudes upward and the center portion of the upper end portion is recessed). Furthermore, the upper edge of the jaw protrusion 22 may be formed in a shape that follows the lower edge of the protrusions 33, 33.

[0141] The cutouts 23 , 23 of the present embodiment are formed in a shape that is cut obliquely downward on the extended line of the upwardly protruding substantially arc shape of the jaw projection 22 at the lower side of the annular peripheral portion 19 and expands downward, but the present invention is not limited thereto.

[0142] For example, the cutouts 23, 23 may be formed in a shape obtained by cutting in a substantially vertical direction on the extension line of the jaw protrusion 22 which is substantially rectangular or substantially fish cake-shaped and protrudes upward, or in a shape obtained by cutting in a substantially vertical direction on both sides of the jaw protrusion 22 which is formed to be recessed downward relative to the annular peripheral portion 19, or at the base end of the jaw protrusion 22 which is substantially arc-shaped and protrudes upward, such as Fig.18 As schematically shown in the mask 1H, a pair of downward cuts are cut on the extension line of the lower annular peripheral portion 19 to form cutout portions 23, 23, and a portion closer to the center in the left-right direction than the pair of cutout portions 23, 23 is formed as a jaw protrusion 22.

[0143] In addition, the cut-in jaw protrusion 22 may be partially formed into a shape that narrows downward. Fig.19 As shown in the schematic diagram of the mask 1J, there is no gap between the protrusions 20, 20 protruding from the left and right and the jaw protrusion 22, or the two are close to each other. Fig. 20 As schematically shown in the mask 1K, the cutouts 23, 23 are configured as cutouts in a substantially V-shape (or other shapes such as a substantially U-shape or a substantially Japanese kana U-shape) rather than in the shape of a cutting line.

[0144] [Variation 4: Structure of nose bridge protrusion]

[0145] In the present embodiment, the nose bridge protrusions 24, 24 are each formed in a substantially rectangular shape protruding obliquely downward from the vicinity of the left-right center of the annular peripheral portion 19, but the present invention is not limited thereto.

[0146] The above-described embodiments are examples of the present invention, and it goes without saying that the present invention is not limited to the above-described embodiments.

[0147] Description of Reference Numerals

[0148] 1. Mask; 2. Mask body; 3. Face contact piece; 4. Ear strap; 6. Central part; 7. Folding part; 8. Side part; 10. Upper narrowing part (narrowing part); 11. Lower narrowing part (narrowing part); 18. Opening; 19. Annular peripheral part (peripheral part); 20. Protrusion; 21. Air vent; 22. Jaw protrusion (protrusion); 100. Wearer.

Claims

1. A mask, comprising: a mask body portion, which is exposed to the outside when worn on the wearer's face; and The ear ropes are respectively arranged on both sides of the mask body. The mask is characterized in that The mask body is provided with: a central portion that covers the left-right central portion of the face of the wearer in the longitudinal direction; a folding portion connected to a side of the central portion and folded along a longitudinal direction of the mask body; and The side portion is connected to the side of the folded portion and covers the side of the wearer's face. The central portion has a narrowing portion whose width in the left-right direction decreases from the central portion in the up-down direction toward the upper and / or lower sides. The mask main body is composed of: When the wearer is not wearing the mask, the folding portion is folded and the mask body becomes flat. When the wearer uses the ear strap, the folded portion stands up due to the tension of the ear strap to form a three-dimensional shape.

2. The mask according to claim 1, characterized in that The mask has: a first pleat fold line formed at a boundary between the folded portion and the central portion; and a second pleat fold line formed at the boundary between the folded portion and the side portion, The upper end of the first pleat fold line and the upper end of the second pleat fold line are formed at substantially the same position, and / or the lower end of the first pleat fold line and the lower end of the second pleat fold line are formed at substantially the same position.

3. The mask according to claim 1, characterized in that The central portion includes a vertical portion located at least in the middle portion in the up-down direction and arranged in a substantially vertical direction, and the narrowed portion arranged to be located above and / or below the vertical portion. The ear rope is connected to the mask body at a vertical position substantially equal to a boundary between the vertical portion and the narrowed portion and / or at a vertical position closer to a center portion in a vertical direction than the boundary.

4. The mask according to claim 1, characterized in that The ear ropes are respectively installed at the mounting portions of the mask body, and are connected to the mask body at the vertical positions where the narrowing portion is provided and at approximately equal distances from the upper and lower ends of the mask body.

5. The mask according to any one of claims 1 to 4, characterized in that: The mask includes a face contact piece which is provided inside the mask body and contacts the face of the wearer.

Images