阅读说明：本技术 一次性口罩 (Disposable mask ) 是由 古屋芳织 柴田彰 于 2019-01-15 设计创作，主要内容包括：提供一次性口罩,其中口罩主体具有多个褶部,能够防止在佩戴时与下方褶部相比上方褶部先伸展。上方褶部(61)和下方褶部(64)具有位于口罩主体(20)的内外表面且在宽度方向(X)上延伸的内外折弯部位(61A、61B、64A、64B)和能够在上下方向(Y)上伸展的伸展区域,在上方褶部(61)配置有用于抑制上方褶部(61)伸展的一对褶调整部件(70)。上方褶部(61)的伸展区域的宽度方向(X)的尺寸(L2)比下方褶部(64)的伸展区域的宽度方向的尺寸(L3)小,褶调整部件(70)不与上方褶部(61)的内外折弯部位(61A、61B)交叉。(Provided is a disposable mask, wherein a mask body has a plurality of pleats, and an upper pleat is prevented from being stretched earlier than a lower pleat when worn. The upper fold portion (61) and the lower fold portion (64) have inner and outer fold portions (61A, 61B, 64A, 64B) that are located on the inner and outer surfaces of the mask body (20) and extend in the width direction (X), and an extension region that can extend in the vertical direction (Y), and a pair of fold adjustment members (70) for suppressing extension of the upper fold portion (61) are disposed in the upper fold portion (61). The dimension (L2) in the width direction (X) of the expanded region of the upper gusset (61) is smaller than the dimension (L3) in the width direction of the expanded region of the lower gusset (64), and the pleat adjustment member (70) does not intersect the inner and outer folded portions (61A, 61B) of the upper gusset (61).)

1. A disposable mask having a vertical direction and a width direction, and comprising a center line crossing the vertical direction and bisecting the dimension, a mask main body, and a pair of ear hanging parts,

the disposable mask is characterized in that,

the mask body includes a plurality of folds formed by folding a sheet forming the mask body into a pleated shape,

the plurality of pleats having an upper pleat located above the transverse centerline and a lower pleat located below the transverse centerline,

the upper fold and the lower fold have an inner and outer folded portion located on the inner and outer surfaces of the mask body and extending in the width direction, and an extension region capable of extending in the up-down direction,

a pair of pleat adjusting members for suppressing expansion of the upper pleat portion are arranged in the upper pleat portion, the pair of pleat adjusting members being located at positions spaced apart from each other in the width direction,

the dimension in the width direction of the expanded region of the upper fold is smaller than the dimension in the width direction of the expanded region of the lower fold,

the fold adjusting member does not intersect the inner and outer folded portions of the upper fold.

2. The mask of claim 1 wherein,

the mask body has side seal regions extending in the vertical direction along both side edges of the mask body, and the pleat adjusting member is a pleat adjusting joint portion located on the inner side in the width direction of the side seal regions.

3. The mask of claim 2 wherein,

a side non-joined region is provided between the side seal region and the fold adjustment joint in the width direction.

4. The mask of claim 2 or 3 wherein,

the dimension in the width direction of the side non-joined region is 5 to 15 mm.

5. The mask according to any one of claims 2 to 4 wherein,

the side seal region is formed by a plurality of side joining portions arranged at intervals in the vertical direction and the width direction.

6. The mask according to any one of claims 1 to 5,

the pair of fold adjustment joints extend parallel to each other in the vertical direction.

7. The mask according to any one of claims 2 to 6 wherein,

the fold-adjusting joint portion has a plurality of independent joint portions arranged in the vertical direction.

8. The mask according to any one of claims 2 to 7,

the fold-adjusting joint is located at a position shifted downward from the upper fold.

9. The mask of claim 3 wherein,

the fold portion has a 1 st fold portion, a 2 nd fold portion, a 3 rd fold portion, and a 4 th fold portion arranged in this order in the up-down direction, a fold region having a substantially Ω -shaped cross section is formed by the 2 nd fold portion and the 3 rd fold portion, and the side joint portion is not disposed in a central portion of the fold region where the main body panel is not folded and a portion between an outer fold portion of the 3 rd fold portion and an inner fold portion of the 4 th fold portion.

10. The mask according to any one of claims 2 to 9 wherein,

the upper fold portion has a 1 st upper fold portion and a 2 nd upper fold portion located below the 1 st upper fold portion, and the fold adjustment joint portion of the 2 nd upper fold portion is located on the outer side in the width direction than the fold adjustment joint portion of the 1 st upper fold portion.

11. The mask according to any one of claims 1 to 10 wherein,

the lower edge of the mask body has a central portion bent in a convex shape upward between the lower fixing ends of the ear hanging portions.

Technical Field

The invention relates to a disposable mask.

Background

Disposable masks have been known from the past. For example, patent document 1 discloses a disposable mask including a mask body and a pair of ear loops extending from both side edges of the mask body.

Disclosure of Invention

In the disposable mask disclosed in patent document 1, the mouth-nose covering portion of the mask body has a plurality of fold portions formed by folding a sheet forming the mask body into a folded shape, and the fold portions are unfolded in the vertical direction when worn, so that the entire mouth and nose of the wearer can be covered.

The mask having the plurality of pleats can adjust the longitudinal dimension of the mask body in accordance with the longitudinal length of the face of the wearer, but in order to prevent the positional deviation when worn on the mouth side where the movement of the face is more active than that of the nose side, it is preferable to first bring the mask body into close contact with the chin of the wearer and then appropriately adjust the longitudinal dimension of the mask body in accordance with the longitudinal length of the face.

However, when the disposable mask is worn, the order of expansion (unfolding) of the plurality of pleats is arbitrary, and for example, when the wearer pulls down and stretches the lower end portion of the mask body, all pleats may be expanded almost simultaneously, or the upper pleat may be expanded first compared to the lower pleat. When the upper flap is first stretched as compared with the lower flap, if the vertical length of the wearer's face is short, the mask is worn in a state where the upper flap of the mask body is fully stretched and the lower flap is not sufficiently stretched, and therefore, a space around the mouth cannot be sufficiently secured, and there is a fear that the mask closely contacts the mouth during wearing and a feeling of discomfort is given, and further, there is a fear that the mask body cannot be attached to the chin of the wearer and a gap is generated.

The present invention improves the existing disposable mask, and the subject of the invention is to provide a disposable mask, wherein the mask main body is provided with a plurality of folding parts, and the upper folding part can be prevented from stretching earlier than the lower folding part when the disposable mask is worn.

In order to solve the above problems, the present invention relates to a disposable mask having a vertical direction and a width direction, and including a transverse center line bisecting the vertical dimension, a mask body, and a pair of ear loops.

The disposable mask of the present invention is characterized in that the mask body includes a plurality of folds formed by folding a sheet forming the mask body in a pleated shape, the plurality of folds have an upper fold located above the transverse center line and a lower fold located below the transverse center line, the upper fold and the lower fold each have an inner and outer folded portion located on an inner and outer surface of the mask body and extending in the width direction and an expansion region capable of expanding in the up-down direction, a pair of fold adjustment members spaced apart from each other in the width direction are arranged in the upper fold to suppress expansion of the upper fold, and the dimension in the width direction of the expansion region of the upper fold is smaller than the dimension in the width direction of the expansion region of the lower fold, the fold adjusting member does not intersect the inner and outer folded portions of the upper fold.

The disposable mask of the present invention includes the following preferred embodiments.

(1) The mask body has side seal regions extending in the vertical direction along both side edges of the mask body, and the pleat adjusting member is a pleat adjusting joint portion located on the inner side in the width direction of the side seal regions.

(2) A side non-joined region is provided between the side seal region and the wrinkle-adjustment joint portion in the width direction.

(3) The dimension in the width direction of the side non-joined region is 5 to 15 mm.

(4) The side seal region is formed by a plurality of side joining portions arranged at intervals in the vertical direction and the width direction.

(5) The pair of fold adjustment joints extend parallel to each other in the vertical direction.

(6) The fold-adjusting joint portion has a plurality of independent joint portions arranged in the vertical direction.

(7) The fold-adjusting joint is located at a position shifted downward from the upper fold.

(8) The fold portion has 1 st to 4 th fold portions arranged in this order in the up-down direction, a fold region having a substantially Ω -shaped cross section is formed by the 2 nd and 3 rd fold portions, and the side joint portion is not disposed in a central portion of the fold region where the main body panel is not folded and a portion between an outer fold portion of the 3 rd fold portion and an inner fold portion of the 4 th fold portion.

(9) The upper fold portion has a 1 st upper fold portion and a 2 nd upper fold portion located below the 1 st upper fold portion, and the fold adjustment joint portion of the 2 nd upper fold portion is located on the outer side in the width direction than the fold adjustment joint portion of the 1 st upper fold portion.

(10) The lower edge of the mask body has a central portion bent in a convex shape upward between the lower fixing ends of the ear hanging portions.

Effects of the invention

According to the disposable mask of the present invention, since the dimension in the width direction of the extended region of the upper fold portion is smaller than the dimension in the width direction of the extended region of the lower fold portion, and the fold adjusting member does not intersect the inner and outer folded portions of the upper fold portion, the mask body can be stretched from the lower fold portion first when worn, the mask body can be attached to the chin portion, and the longitudinal dimension of the mask body can be appropriately adjusted to the longitudinal length of the wearer's face by the upper fold portion.

Drawings

The drawings show specific embodiments of the present invention, and include not only essential components of the invention but also optional or preferred embodiments.

Fig. 1 is a plan view of a disposable mask according to embodiment 1 of the present invention, as viewed from the front.

Fig. 2 is an enlarged plan view of the mask body.

Fig. 3 is a perspective view of one side portion of the mask as viewed from the outside, taken along the line III-III in fig. 1.

Fig. 4(a) is a partially enlarged view of the region surrounded by the chain line iv (a) of fig. 3. Fig. 4 (b) is a partially enlarged view of an area surrounded by a dashed-dotted line iv (b) of fig. 3.

Fig. 5 is a side view of the mask in a worn state.

Fig. 6 is a sectional view taken along line VI-VI of fig. 5.

Fig. 7 is a plan view of a mask body according to an example of a modification.

Fig. 8 is a plan view of the mask of embodiment 2.

Fig. 9 is a view of the mask as viewed from below in a worn state.

Detailed Description

The following embodiments relate to the disposable mask 10 shown in fig. 1 to 9, and include not only essential components of the present invention but also optional and preferable components.

< embodiment 1 >

Referring to fig. 1 to 4, a mask 10 according to embodiment 1, which is an example of a disposable mask of the present invention, has a vertical direction (longitudinal direction) Y and a width direction X, and includes: a skin-facing surface (inner surface) and a non-skin-facing surface (outer surface) opposite thereto; the size of the vertical direction Y is divided into two equal parts to cross a central line Q; a mask body 20; and a pair of annular ear portions 30 extending from both side edges 20c, 20d of the mask body 20.

The mask body 20 is formed of a body sheet, and includes: an upper end edge 20a extending linearly in the width direction X; a lower edge 20b extending in the width direction X; and both side edges 20c, 20d extending in the up-down direction Y between the upper and lower end edges 20a, 20 b. Further, the mask body 20 includes: an upper end portion 21 extending in the width direction X along the upper end edge 20 a; a lower end portion 22 extending in the width direction X along the lower end edge 20 b; and an oronasal covering 23 located between the upper end 21 and the lower end 22. The mask body 20 further has a curved corner 24 where the upper and lower edges 20a, 20b intersect with the side edges 20c, 20 d. The corners 24 are curved rather than sharp, thereby not giving irritation even if the corners 24 touch the wearer's face.

The mask 10 can be used for all ages, regardless of the age and sex of the adult, the child, and the like, and can be used for all ages, including, for example, 75 to 100mm in the vertical direction Y of the mask body 20, and 115 to 185mm in the width direction X of the mask body 20. However, when the mask 10 is used as a so-called child mask for young people of 6 to 9 years old, that is, for children, it is preferable that the mask body 20 has a dimension W1 in the vertical direction Y (the length of both side edges 20c, 20 d) of 75 to 95mm and a dimension L1 in the width direction X (the length of both upper and lower end edges 20a, 20 b) of 115 to 135 mm.

Referring to fig. 4 (b), the main body sheet forming the mask body 20 is composed of an inner layer sheet 41 positioned on the skin-facing surface side, an outer layer sheet 42 positioned on the non-skin-facing surface side, and an intermediate layer sheet 43 positioned between the inner and outer layer sheets 41, 42. The inner and outer sheets 41, 42 and the intermediate sheet 43 are made of, for example, heat-fusible fibers and have a mass of 10 to 40g/m²The fiber nonwoven fabric sheet having air permeability can be formed of various known fiber nonwoven fabrics such as a melt-blown fiber nonwoven fabric, a spun-bonded fiber nonwoven fabric, an SMS fiber nonwoven fabric, and a hot air fiber nonwoven fabric, and can also be formed of a sheet material having excellent air permeability such as a gauze and a cotton cloth. As the intermediate layer sheet 43, a nonwoven fabric having a filtering function of preventing fine particles from passing through is preferably used.

The mask body 20 of the present embodiment has a mass of, for example, 20 to 45g/m²The spunlace nonwoven fabric or spun-bonded nonwoven fabric is used as the outer layer sheet 42, and the mass of the spunlace nonwoven fabric or spun-bonded nonwoven fabric is 20-30 g/m²The melt-blown nonwoven fabric (2) has a mass of 20 to 30g/m as the intermediate layer sheet (43)²The inner layer sheet 41 is a spunbonded nonwoven fabric. In addition to the illustrated examples, the mask body 20 may be formed of a laminate of two or more sheets, and for example, a plurality of intermediate layer sheets 43 having a fine particle filtering function and containing an antibacterial agent, an aromatic agent, or the like may be interposed between the inner and outer layer sheets 41 and 42.

The mask body 20 has an upper folded part 26 at the upper end 21 and a lower folded part 27 at the lower end 22, wherein the upper folded part 26 is formed by folding a part of the inner layer sheet 41 and a part of the intermediate layer sheet 43 toward the lower side of the outer surface of the mask body 20 via the upper end edge of the outer layer sheet 42, and the lower folded part 27 is formed by folding a part of the outer layer sheet 42 toward the upper side of the outer surface of the mask body 20 along the lower end edge 20b of the mask body 20.

The inner and outer sheets 41 and 42 and the intermediate sheet 43 are joined to each other by a peripheral seal region 50 intermittently extending along the outer peripheral edge of the mask body 20. The outer peripheral seal region 50 has: an upper side seal region 51 formed by 2 lines intermittently extending in the width direction X along the upper end edge 20a of the mask body 20; a lower side seal region 52 intermittently extending in the width direction X along the lower end edge 20 b; and side seal regions 53 intermittently extending in the vertical direction Y along both side edges 20c, 20 d.

The outer peripheral seal region 50 is a fusion seal line in which the inner and outer layer sheets 41 and 42 and the intermediate layer sheet 43 are fused to each other at a plurality of intermittently arranged bonding portions, and the sheets 41 to 43 are bonded only to the outer peripheral seal region 50 and are not bonded to each other at other portions. Therefore, the mask 10 is superior in flexibility and air permeability as a whole as compared with the case where the entire inner surfaces of the respective sheets 41 to 43 are joined to each other.

The joint portions 51a, 52a forming the upper side seal region 51 and the lower side seal region 52 are formed in a substantially elliptical shape that is long in the width direction. On the other hand, the side seal region 53 is formed by large and small substantially star-shaped joint portions 53a, 53b and a substantially circular joint portion 53 c. Unlike the upper and lower side seal regions 51, 52, the side seal region 53 is formed by a plurality of designed joint portions 53a to 53c, and thus the mask 10 is superior in appearance in front view and side view compared to the case where the entire outer peripheral seal region 50 is formed by only joint portions of a substantially circular or substantially elliptical shape. In addition, since the side joining portions 53a to 53c disposed on one side edge 20c of the mask body 20 and the side joining portions 53a to 53c disposed on the other side edge 20d are disposed almost symmetrically in the side seal region 53, a uniform design is provided.

An elastic band piece (nose attachment portion) 16 extending in the width direction X is arranged between 2 seal lines of the upper seal region 51. The elastic band piece 16 is interposed between the outer layer piece 42 and the upper bent portion 26, and specifically, the elastic band piece 16 is sandwiched and fixed in a cylindrical space formed between 2 seal lines (forming the upper side seal region 52). On the outer sides of both ends of the elastic band piece 16 in the width direction X, joint portions 51b for restricting movement of the elastic band piece 16 in the width direction X are arranged.

The ear loops 30 are formed of various known elastic materials such as nonwoven fabric, woven fabric, plastic film, rubber string, and knitted string, and have a pair of upper and lower fixed ends 31 and 32 positioned at the upper end 21 and the lower end 22 of the mask body 20, and a free portion 33 extending in a loop shape between the upper and lower fixed ends 31 and 32. The upper fixing ends 31 of the ear straps 30 are fixed to the outer surface of the upper end 21 of the mask body 20 via the upper fixing portions 17, and the lower fixing ends 32 are fixed to the outer surface of the lower end 22 of the mask body 20 via the lower fixing portions 18. In the present embodiment, a braided rope having a width of 4 to 8mm is used as the ear portion 30. By using a wide braided cord instead of a rubber cord in this manner, the cord can be gently brought into contact with the ear of the wearer without causing strangulation, and the child wearer can be prevented from breaking or losing elasticity even if the child wearer is not used with a seal.

The upper and lower fixing portions 17, 18 are larger than the upper and lower fixing ends 31, 32 of the ear portions 30 by one turn, have a substantially rectangular shape formed by a mesh-like embossed pattern, and the upper and lower fixing ends 31, 32 are bonded or welded to the mask body 20. The upper and lower fixing portions 17, 18 are larger than the upper and lower fixing ends 31, 32 of the ear portion 30, so that the upper and lower fixing ends 31, 32 have a peeling strength necessary for peeling the mask body 20, and are not easily peeled even if a force for peeling the upper and lower fixing ends 31, 32 is applied thereto during wearing.

Further, a part of the upper and lower fixing portions 17 and 18 overlaps with the joint portions 51a and 52a forming the upper and lower side seal regions 51 and 52, and the joint strength is higher at the overlapping portion. The upper and lower fixing ends 31, 32 of the ear hanging part 30 are fixed to the non-skin-facing surface of the mask body 20 by the upper and lower fixing parts 17, 18. By fixing the upper and lower fixed ends 31 and 32, which are both end portions of the free portion 33 of the ear hanging portion 30, to the non-skin-facing surface of the mask body 20 in this manner, the upper and lower fixed ends 31 and 32 function to bring the mask body 20 into contact with the face in the worn state, and the close contact of the mask body 20 with the face can be improved as compared with the case where the upper and lower fixed ends are fixed to the inner surface side of the mask body 20.

The oronasal covering portion 23 of the mask body 20 has a plurality of folds (wrinkles) 60 extending in the width direction X formed by folding a body sheet into a wrinkle shape. The fold 60 includes a 1 st fold 61, a 2 nd fold 62, a 3 rd fold 63, and a 4 th fold 64 arranged in this order from the upper end edge 20a side to the lower end edge 20b side of the mask body 20.

Each of the folds 61 to 64 is folded into a fold shape and is folded in different directions in the upper and lower directions on the outer surface side and the inner surface side of the mask body 20, the 1 st fold 61 has an outer folded portion 61A located on the outer surface side and protruding upward and an inner folded portion 61B located on the inner surface side and protruding downward, the 2 nd fold 62 has an outer folded portion 62A located on the outer surface side and protruding upward and an inner folded portion 62B located on the inner surface side and protruding downward, the 3 rd fold 63 has an outer folded portion 63A located on the outer surface side and protruding downward and an inner folded portion 63B located on the inner surface side and protruding upward, and the 4 th fold 64 has an outer folded portion 64A located on the outer surface side and protruding downward and an inner folded portion 64B located on the inner surface side and protruding upward.

In the present specification, a pleat located above the cross center line Q in the pleat 60 is referred to as an upper pleat, and a pleat located below the cross center line Q is referred to as a lower pleat. In the present embodiment, the 1 st and 2 nd pleats 61, 62 are upper pleats, and the 3 rd and 4 th pleats 63, 64 are lower pleats, but the upper pleats may be 1 or 2 or more pleats, and the lower pleats may be 1 or 2 or more pleats. In the mask body 20 of the present embodiment, the 2 nd fold portion 62 is curved convexly upward and the opposite 3 rd fold portion 63 is curved convexly downward on the outer surface side, and thus a bent region having a substantially Ω -shaped cross section is formed in the center portion of the mask body 20, and a large internal space can be formed when the mask is worn.

Referring to fig. 3 and 4(a), the 1 st fold portion 61 is provided with a pair of fold adjustment joining portions 70 (fold adjustment members) facing each other at a spacing in the width direction X. The fold-adjusting joint 70 is located on the inner side in the width direction X of the side seal regions 53 and the side edges 20c, 20d of the mask body 20, and joins the body pieces facing each other in the thickness direction. By disposing the pair of joint parts for pleat adjustment 70 in the 1 st fold part 61 in this manner, a portion extending in the width direction X between the pair of joint parts for pleat adjustment 70 in the 1 st fold part 61 becomes an extension region that can be extended in the vertical direction Y when worn. The fold adjusting member may be formed by welding using a known welding method such as heat embossing or ultrasonic processing, or may be formed by bonding the overlapping portions to each other using a known adhesive, or may be formed by interweaving the constituent fibers to maintain the folded state, as long as the folded state is maintained by the overlapping portions of the body sheets that are folded so as to face each other in the thickness direction.

On the other hand, since the fold adjustment joint 70 is not disposed in the 2 nd to 4 th folds 62 to 64, the region between the side joints 53a to 53c constituting the side seal region 53 becomes an expansion region that can expand in the vertical direction. Specifically, the regions between the side joining portions 53a to 53c positioned on the innermost side in the width direction X (the regions extending in the width direction X between the inner edges of the side joining portions 53a to 53 c) among the side joining portions 53a to 53c of the respective pleats 62 to 64 are stretched regions. For example, in the 4 th fold portion 64, the region between the side joining portions 53a located innermost in the width direction X becomes an expanded region.

Referring to fig. 2, the fold adjustment joint 70 is disposed in the 1 st fold 61, and thus the width L2 of the expansion region is smaller than the width L3 of the expansion region of the 4 th fold 64. For convenience of explanation, the mask body 20 is divided into a central region 14 and both side regions 15 on both sides thereof in the width direction X. The central region 14 refers to the region where the extending regions of the 1 st to 4 th pleats 61 to 64 are located, that is, the region where the extending region of the 1 st pleat 61 is located, and the both side regions 15 refer to the regions located between the extending region of the 1 st pleat 61 and the both side edges 20c and 20d of the mask body 20. In the worn state of the mask 10, in the central region 14 of the mask body 20, the extended region of the fold portion 60 is extended in accordance with the longitudinal length of the wearer's face (the length from the nose to the submandibular region), so that the longitudinal dimension (the dimension in the vertical direction Y) thereof becomes large, and the both side regions 15 are not extended, and therefore are extended only slightly as compared with before wearing.

In the 1 st fold portion 61, a side portion non-joined region 59 where the side joined portions 53a to 53c are not arranged is provided between the side seal region 53 and the fold adjustment joined portion 70 in the width direction X. The side non-joined regions 59 are located between the side seal regions 53 and the fold adjustment joint portions 70, so that both side edge portions of the mask body 20 have required flexibility, and a feeling of discomfort when worn due to the hardening of the joining of the plurality of sheets can be prevented. However, as long as the both side regions 15 of the mask body 20 have a sheet rigidity of a degree that the side regions do not float from the cheeks of the wearer along the contour of the cheeks, the side joint portions 53a to 53c may be disposed between the side seal regions 53 and the fold adjustment joint portions 70 without forming the side non-joint regions 59.

In general, when wearing a mask having a plurality of pleats formed by folding a main body sheet into a pleated shape, free portions of ear straps are hooked around the ears of a wearer, and then the lower end portion of the mask main body is held with fingers and pulled downward, thereby stretching the pleats. In this case, since the portion of the wearer's face that moves is the mouth side rather than the nose side, it is preferable to wear the mask in a state where the entire lower fold portion is stretched so that a space is formed around the mouth during wearing of the mask and the mask does not closely contact the mouth.

However, when the lower end portion of the mask body is held and pulled downward, it is not possible to control which fold is stretched first, and there is a concern that the upper fold is stretched first compared to the lower fold. In this case, when the face of the wearer is small in the vertical direction, the vertical dimension of the central region of the mask body is adjusted in accordance with the vertical length of the face after the upper fold is fully extended, and therefore the mask comes into contact with the chin without the lower fold being fully extended. Therefore, a space cannot be formed around the mouth, and the mask may come into close contact with the mouth to give a sense of discomfort.

Referring to fig. 5 and 6, in the mask 10 of the present embodiment, the pair of fold-adjusting seams 70 is disposed in the 1 st fold (upper fold) 61, so that the dimension L2 in the width direction of the stretched area is smaller than the dimension L3 in the width direction X of the stretched area of the 4 th fold (lower fold) 64, and stretching is prevented. Therefore, when the mask 10 is worn, the 3 rd fold portion 63 and the 2 nd fold portion 62 are sequentially stretched upward from the 4 th fold portion 64, whereby the central region 14 of the mask body 20 is largely expanded vertically to form a sufficient internal space with the mouth, and the wearer does not feel uncomfortable breathing. On the other hand, since the fold adjustment joint 70 is present in the 1 st fold 61 and the expansion thereof is prevented, the wearer can wear the wearer with the expansion region thereof not expanded at all or slightly expanded depending on the longitudinal length of the wearer's face. In the illustrated example, the wearer is a child and the longitudinal length of the face is small, so that the stretch region of the 1 st fold 61 is hardly stretched.

The fold-adjusting joint 70 does not intersect the outer fold portion 61A located on the outer surface side and the inner fold portion 61B located on the inner surface side of the 1 st fold portion 61. When the fold-adjusting joint 70 intersects with the upper and lower folded portions 61A, 61B, the expansion of the 1 st fold portion 61 is partially or completely prevented by the fold-adjusting joint 70, and thus the degree of expansion (degree of mobility) of the expansion region located between the fold-adjusting joint 70 becomes small, and there is a possibility that the 1 st fold portion 61 cannot be expanded appropriately according to the size of the wearer's face, and the expansion degree can be adjusted appropriately according to the size of the wearer's face by not intersecting the fold-adjusting joint 70 with either of the two folded portions 61A, 61B.

Referring again to fig. 2 and 3, the pair of fold adjustment joint portions 70 extend in parallel with each other in the vertical direction Y. For example, when the fold adjustment joint 70 extends obliquely outward in the width direction X from above to below, the width dimension of the extended region of the 1 st fold 61 gradually increases downward, so that the portion on the outer bent portion 61A side comes into close contact with the skin along the shape of the nose during extension, and the portion on the inner bent portion 61B side has a larger width dimension than the portion on the outer bent portion 61A side, and may collapse in the vicinity under the nose and bend inward, thereby blocking the nostrils. In the present embodiment, since the fold-adjusting joints 70 extend parallel to each other, the width of the extended region of the 1 st fold 61 is almost the same at any portion, and the portion on the side of the inner fold portion 61B does not collapse near under the nose when extended, and a state of being spaced apart from the nostrils can be maintained.

The fold-adjusting joint 70 has a plurality of independent joints 71 and 72 arranged in the vertical direction Y. Although the fold-adjusting joint portion 70 preferably has a certain dimension in the vertical direction in order to prevent the first fold portion 61 from stretching, when it extends continuously in the vertical direction Y, a portion having high sheet rigidity is formed in a wide range, which may cause discomfort to the wearer. In particular, the wrinkle adjustment joint 70 is preferably soft to the skin because it is located on the center side of the face, unlike the side joints 53a to 53 c. The fold adjustment joint 70 has a plurality of independent joints 71, 72 arranged in the vertical direction Y, and thus does not form a portion having high sheet rigidity in a wide range and give a wearer a sense of discomfort. Further, each of the engaging portions 71, 72 has a circular or elliptical shape, and thus, no stimulus is given even if the cheek of the wearer is touched.

The fold-adjusting joint 70 is located at a position shifted downward in the 1 st fold 61. The mask body 20 is formed of a plurality of pieces, and the plurality of pieces are folded at the inward and outward folded portions 61A and 61B of the 1 st fold portion 61, and the outward folded portion 61A of the mountain fold is more likely to be folded in a state where the pieces are shifted from each other than the inward folded portion 61B of the valley fold in the manufacturing process. By positioning the fold-adjusting joint 70 at a position offset downward from the 1 st fold 61, all of the sheets folded at the inner fold portion 61B can be reliably joined together. However, as long as all the folded sheets can be joined, the fold-adjusting joint 70 may be located in each of the pleats 61 to 64, or may be located substantially in the center or on the upper side of each of the pleats 61 to 64.

As described above, since the side joining portions 53a to 53c constituting the side seal region 53 are arranged at intervals in the width direction X and the vertical direction Y, the side seal region 53 has a desired flexibility, and it is possible to prevent both side edge portions of the mask body 20 from floating along the shape of the face due to excessively high rigidity. Further, the respective pleats 61 to 64 are not completely joined at the side seal region 53, and thus, it can be said that they are easily stretched in accordance with the size of the wearer's face when worn.

Referring to fig. 3, the side joint portions 53A to 53c are not disposed in the non-folded portion 55, which is located in the central portion between the 3 rd fold portion 63 and the 4 th fold portion 64 and is not folded in the main body panel, and in the portion 56 between the outer fold portion 63A of the 3 rd fold portion 63 and the inner fold portion 64B of the 4 th fold portion 64. Referring to fig. 5, since the side joint portions 53a to 53c are not disposed in these portions 55 and 56, the mask body 20 can be bent from these portions 55 and 56 along the shape of the wearer's face by the rearward traction force generated by the ear hanging portions 30, and can be further fitted.

In the case where the width L1 of the mask body 20 is 115 to 135mm, the width R1 of the side non-joined region 59 between the side seal region 53 and the fold-adjusting joint 70 in the 1 st fold 61 is preferably 5 to 15 mm. When the width dimension R1 of the side non-joined region 59 is less than 5mm, there is a possibility that the width dimension of the expansion region becomes large, and the 1 st fold 61 and the 2 nd fold 62 are expanded almost simultaneously by the force to expand them toward the lower side. On the other hand, when the width of the side non-joined region 59 exceeds 15mm, the width of the stretched region may become smaller, and the force to stretch the stretched region may be dispersed by the fold-adjusting joined portion 70 to form wrinkles extending in the width direction X, which may cause the stretched region to wrinkle toward the vicinity of the lower nose of the wearer and block the nostrils. Further, in the case where the width dimension of the side non-joined region 59 exceeds 30mm, the width dimension of the expansion region becomes smaller and almost cannot be expanded.

Although not shown, a decorative element may be disposed on the outer surface of the mask body 20 so that the wearer can easily distinguish the inner and outer surfaces of the mask 10. The decorative elements can be formed by printing the main body sheet, and for example, animal-like images, various known figures, decorative patterns, designs, characters, symbols, colored portions different from the mask main body, and the like can be suitably used.

< modification example >

Fig. 7 is a plan view of an example of a modification of the disposable mask 10 according to the present embodiment, in which a fold adjustment joint (fold adjustment member) 170 is also disposed in the 2 nd fold portion 62. By arranging the fold-adjusting joints 70 and 170 in the 1 st fold portion 61 and the 2 nd fold portion 62, the 4 th fold portion 64 and the 3 rd fold portion 63 are sequentially stretched when the mask 10 is worn, and the 2 nd fold portion 62 and the 1 st fold portion 61 can be slightly stretched or not stretched according to the size of the face of the wearer, whereby the dimension of the mask body 20 in the vertical direction Y can be appropriately adjusted.

In addition, when the dimension in the width direction X of the stretched region of the 2 nd fold 62 is the same as or smaller than the dimension in the width direction X of the stretched region of the 1 st fold 61, there is a possibility that the stretched region of the 1 st fold 61 and the stretched region of the 2 nd fold 62 are simultaneously expanded, and it is difficult to adjust the longitudinal dimension of the central region 14 of the mask body 20 in accordance with the longitudinal length of the wearer's face. In the present embodiment, the fold-adjusting joint portion 170 located in the 2 nd fold portion 62 is located on the outer side in the width direction X than the fold-adjusting joint portion 70 located in the 1 st fold portion 61. Accordingly, since the width of the expansion region of the 2 nd fold 62 is larger than the width of the expansion region of the 1 st fold 61, when the wearer pulls the lower end portion 22 of the mask body 20 downward, the expansion region of the 2 nd fold 62 receives a large pulling force and is easily expanded, and the expansion region can be expanded to an appropriate degree in accordance with the longitudinal length of the face portion as compared with the 1 st fold 61.

Therefore, the 2 nd fold 62 and the 1 st fold 61 are sequentially stretched in accordance with the size of the face of the wearer, and thereby the vertical dimension of the central region 14 of the mask body 20 can be adjusted in a wider range than in the case where the fold adjustment joint 70 is disposed only in the 1 st fold 61. Further, since the fold adjustment joint portion 170 of the 2 nd fold portion 62 is formed of a plurality of independent joint portions, as in the fold adjustment joint portion 70 of the 1 st fold portion 61, this arrangement portion does not come into contact with the face and give a sense of discomfort to the wearer, and the expansion region is not completely prevented from expanding.

< embodiment 2 >

Fig. 8 is a plan view of the disposable mask 10 according to embodiment 2, and fig. 9 is a view of the disposable mask 10 according to embodiment 2 as viewed from below in a worn state. The basic configuration of the disposable mask 10 of the present embodiment is the same as that of the disposable mask 10 of embodiment 1, and therefore, different configurations will be described below.

Referring to fig. 8, in the mask 10 of the present embodiment, the lower edge 20b of the mask body 20 has a shape gently curved upward. Specifically, the lower edge 20b has a central portion 25 between the convexly curved corner portions 24, and the central portion 25 extends in the width direction X and is convexly curved upward. The opposite ends 25a, 25b of the center portion 25 are intersections of the outline of the corner portion 24 curved convexly downward and the outline curved upward, and the length L4 of the center portion 25 is the length of the outline curved upward between the opposite ends 25a, 25 b. Both ends 25a, 25b of the center portion 25 are portions that become starting points in the width direction X of the center portion 25, and are located at intersections of lines that form the center portion 25 extending in an upwardly convexly curved manner and lines that form the outer shape of the corner portions 24 that are convexly curved downwardly. Further, the corner portion 24 has a shape curved convexly downward, but may have a shape in which, for example, a portion forming a part of the lower end edge 20b, which is angular, extends substantially linearly in the width direction X, and in this case, the central portion 25 of the lower end edge 20b has a shape curved convexly upward, and portions positioned on both sides thereof in the width direction X are both linear portions.

Since the central portion 25 of the lower end edge 20b has an upwardly curved shape in this manner, the length L4 is larger than the length L5 of a virtual line K1 that linearly connects the both ends 25a and 25b when the central portion 25 linearly extends in the width direction X. Specifically, for example, in the mask 10 for children, when the length L5 of the virtual line K1 is 105 to 125mm, the length L4 of the center portion 25 is 110 to 133mm, which is longer than the length L5 by about 5 to 8 mm. Here, the transverse center line Q is a line bisecting the dimension of the mask body 20 in the vertical direction Y, and when the lower end edge 20b has a shape curved convexly upward as in the present embodiment, it can be said that the dimension in the vertical direction Y is not constant in the mask body 20. The transverse center line Q is a line bisecting the distance between the uppermost portion and the lowermost portion of the mask body 20, and in the present embodiment, it can be said that the dimension in the vertical direction Y of the side edges 20c and 20d extending in parallel in the vertical direction Y is bisected.

When wearing the mask 10, the ear loops 30 are looped around the ears, and then the lower end 22 of the mask body 20 is pulled downward to stretch the plurality of pleats 60. At this time, in a state where the lower end portion 22 of the mask body 20 is pulled rearward by the ear hanging portions 30 and both side portions of the 4 th fold 64 are in contact with the skin of the wearer, the extension regions of the 3 rd fold 63 and the 4 th fold 64 are pulled downward, and therefore the vertical dimension of the central region 14 is increased. After the expansion areas of the 3 rd fold 63 and the 4 th fold 64 expand, the expansion areas of the 2 nd fold 62 and, optionally, the 1 st fold 61 sequentially expand to match the longitudinal length of the wearer's face.

Referring to fig. 9, in a state where the expansion region of the 4 th fold portion 64 is expanded, the lower end portion 22 of the mask body 20 abuts against the submandibular area of the wearer in a state where the central portion 25 of the lower end edge 20b extends substantially linearly in the width direction X. For example, when the wearer is a child and the chin is round and small, when the fold portion 60 of the mask body 20 according to embodiment 1 is stretched, the central portion 25 of the lower end edge 20b extends downward beyond both side portions thereof, that is, the longitudinal dimension of the central region 14 of the mask body 20 is larger than the longitudinal dimension of both side regions 15, and as a result, the submandibular part may be unfastened, and the lower end portion 22 of the mask body 20 may not be sufficiently bonded, resulting in a gap. Further, when the lower end portion 22 is further pulled to eliminate such unfastening, the throat becomes closer, and therefore, there is a fear that the child wearer may feel uncomfortable in particular.

In the disposable mask 10 of the present embodiment, since the lower end edge 20b of the mask body 20 has the central portion 25 which is bent upward, the lower end edge 20b can be fitted to the submandibular region in a substantially linear state without causing the lower end portion 22 to collapse and become uncomfortable when the longitudinal dimension of the central region 14 of the mask body 20 is increased by stretching since the lower end edge 20b is adjusted so as to be reduced in the longitudinal dimension before stretching.

Further, the shape of the central portion 25 of the lower edge 20b changes from a curved shape to a linear shape, so that the width of the lower end portion 22 is increased as compared with the upper end portion 21 and the oronasal covering portion 23, and the lower end portion fits the face in a laterally widened state. Therefore, it can be said that the lower end portion 22 can be more stably attached to the face by covering the chin of the wearer in a wide surface shape at an appropriate position.

Further, by positioning the fold-adjusting joint portion 70 at the 1 st fold portion 61, when the plurality of folds 60 of the mask body 20 are stretched during wearing, the chin portion can be widely covered by stretching in order from the 4 th fold portion 64 as the lower fold portion without causing the wearer to unfasten and unfasten under the jaw, and the longitudinal dimension of the central region 14 of the mask body 20 can be appropriately adjusted to the longitudinal length of the face portion by the degree of stretching of the 1 st fold portion 61.

In order to pull down the lower end portion 22 so that the central portion 25 of the lower end edge 20b is substantially linear when worn, it is preferable that a part of the central portion 25 is positioned between the lower fixed ends 32 of the ear portions 30. Since a part of the central portion 25 is positioned between the lower fixed ends 32, the curved portion including the central portion 25 positioned therebetween can be effectively pulled downward from the lower fixed end 32 in contact with the face portion.

In the present embodiment, the bottom gusset includes a 3 rd gusset 63 and a 4 th gusset 64, and the longitudinal dimension thereof before stretching (the total dimension of the longitudinal dimension of the 3 rd gusset 63 and the longitudinal dimension of the 4 th gusset 64) is 20 to 30 mm. Therefore, the total longitudinal dimension becomes 55 to 65mm by fully extending the extension regions, and the chin of the wearer can be covered. Further, since the center portion 25 extending substantially linearly under the jaw is spaced from the lower edge of the mandible by about 15 to 25mm, the mandible can be stably covered without causing discomfort such as pinching of the throat by a part of the lower end portion 22.

The degree of curvature of the central portion 25 of the lower end edge 20b can be appropriately adjusted according to the longitudinal length of the face of the wearer, and for example, in the case of an adult mask, the longitudinal length of the face is longer than that of a child, so that it is not necessary to adjust the longitudinal dimension of the central region 14 after wearing to be large, and the degree of curvature is small compared to that of a child. For example, when the mask 10 is for children and the dimension L5 of the virtual line K1 is 105 to 125mm, the longitudinal dimension of the central portion 25, that is, the dimension R2 between the virtual line K1 connecting both ends 25a, 25b of the central portion 25 and extending linearly in the width direction X and the uppermost portion 52c is 5 to 15mm, preferably 8 to 15mm, in the case of the mask 10 for children, and 5 to 25mm in the case of the mask 10 including children and adults.

As for the components constituting the mask 10, any known materials commonly used in this field can be used without particular limitation, in addition to the materials described in the present specification, unless otherwise specified. In addition, terms such as "1 st" to "4 th" used in the present specification are terms used only for distinguishing similar elements, positions, and the like.

Description of the reference numerals

10 Disposable gauze mask (gauze mask)

20 mask body

20b lower end edge

20c side edge

20d side edge

25 center part

53-side bonding region

53 a-53 c side joint part

59 lateral non-junction area

60 fold

61 the 1 st fold (upper fold, 1 st upper fold)

61A external bending part

61B inner bending part

62 No. 2 fold (Upper fold, No. 2 upper fold)

63 the 3 rd fold (lower fold)

63A external bending part

64 th fold (lower fold)

64B inner bending part

70-fold adjustment member (fold adjustment joint)

71 joint part

170 pleat adjusting component (pleat adjusting joint)

L2 Width dimension of extended region of pleat

L3 Width dimension of expanded region of lower pleat

Q transverse to the centre line

Width dimension of R1 side non-joining region

In the X width direction

Y is in the vertical direction.