阅读说明：本技术 一次性口罩 (Disposable mask ) 是由 古屋芳织 柴田彰 于 2018-04-26 设计创作，主要内容包括：提供一次性口罩,能够抑制在口罩本体的下端部与下巴的下部之间产生间隙,并且抑制口罩本体与鼻背之间产生间隙。连结上固定部(61)的中心点(61a)与密封线(30)的上端缘(30a)的第1假想线(K1)同连结上拐点(34)与密封线(30)的上端缘(30a)的第2假想线(K2)交叉而成的第1交角(θ1),比连结下固定部(62)的中心点(62a)与密封线(30)的下端缘(30b)的第3假想线(K3)同连结下拐点(35)与密封线(30)的下端缘(30b)的第4假想线(K4)交叉而成的第2交角(θ2)小,且第2假想线(K2)比所述第4假想线(K4)长。口罩本体(20)的上端部(27)的一部分(27a)位于比第1假想线(K1)靠上方的位置。(Provided is a disposable mask which can suppress the occurrence of a gap between the lower end of a mask body and the lower part of the chin and also suppress the occurrence of a gap between the mask body and the back of the nose. A1 st intersection angle theta 1 formed by intersecting a 1 st imaginary line K1 connecting a center point 61a of an upper fixing portion 61 and an upper end edge 30a of a seal line 30 with a 2 nd imaginary line K2 connecting an upper inflection point 34 and the upper end edge 30a of the seal line 30 is smaller than a 2 nd intersection angle theta 2 formed by intersecting a 3 rd imaginary line K3 connecting a center point 62a of a lower fixing portion 62 and a lower end edge 30b of the seal line 30 with a 4 th imaginary line K4 connecting a lower inflection point 35 and the lower end edge 30b of the seal line 30, and the 2 nd imaginary line K2 is longer than the 4 th imaginary line K4. A part (27a) of the upper end (27) of the mask body (20) is located above a 1 st imaginary line (K1).)

1. A mask, which is a disposable mask having a vertical direction and a width direction and comprising a mask body having a mouth-nose covering portion and a pair of ear hanging portions mounted on both side portions of the mask body,

both ends of the ear hanging part are fixed on the mask body through an upper fixing part and a lower fixing part which are positioned at the side part of the mask body and are separated along the up-down direction,

the mask body has a transverse center line which bisects the vertical dimension and can be folded via a seal line located at the center in the width direction,

the upper end of the mask body has a shape convexly curved upward at the center in the width direction in a state where the mask body is unfolded,

the sealing line is curved in side view when the mask body is folded, and has an upper inflection point between the upper end edge of the sealing line and the transverse center line and a lower inflection point between the lower end edge of the sealing line and the transverse center line and below the center point of the lower fixing portion,

a 1 st intersection angle, which is formed by intersecting a 1 st imaginary line connecting a center point of the upper fixing portion and an upper end edge of the seal line with a 2 nd imaginary line connecting the upper inflection point and an upper end edge of the seal line, is smaller than a 2 nd intersection angle, which is formed by intersecting a 3 rd imaginary line connecting a center point of the lower fixing portion and a lower end edge of the seal line with a 4 th imaginary line connecting the lower inflection point and a lower end edge of the seal line, and the 2 nd imaginary line is longer than the 4 th imaginary line,

a part of the upper end of the mask body is located above the 1 st imaginary line.

2. A mask, which is a disposable mask having a vertical direction and a width direction and comprising a mask body having a mouth-nose covering portion and a pair of ear hanging portions mounted on both side portions of the mask body,

both ends of the ear hanging part are fixed on the mask body through an upper fixing part and a lower fixing part which are positioned at the side part of the mask body and are separated along the up-down direction,

both side portions of the mask body have a pair of convex portions which are adjacent to the upper fixing portion and the lower fixing portion, respectively, and protrude rearward, and a concave portion which is located between the pair of convex portions and is recessed forward,

the contours of the pair of convex portions and the concave portions have curved shapes.

3. The mask of claim 2 wherein,

the curvature radius of the contour of the concave portion is smaller than the curvature radius of the contours of the pair of convex portions.

4. The mask of claim 1 wherein,

both side portions of the mask body have a pair of convex portions which are adjacent to the upper fixing portion and the lower fixing portion, respectively, and protrude rearward, and a concave portion which is located between the pair of convex portions and is recessed forward,

the contours of the pair of convex portions and the concave portions have curved shapes.

5. The mask of claim 2 or 3 wherein,

the mask body has a transverse center line which bisects the vertical dimension and can be folded via a seal line located at the center in the width direction,

the upper end of the mask body has a shape convexly curved upward at the center in the width direction in a state where the mask body is unfolded,

the sealing line is curved in side view when the mask body is folded, and has an upper inflection point between the upper end edge of the sealing line and the transverse center line and a lower inflection point between the lower end edge of the sealing line and the transverse center line and below the center point of the lower fixing portion,

a 1 st intersection angle, which is formed by intersecting a 1 st imaginary line connecting a center point of the upper fixing portion and an upper end edge of the seal line with a 2 nd imaginary line connecting the upper inflection point and an upper end edge of the seal line, is smaller than a 2 nd intersection angle, which is formed by intersecting a 3 rd imaginary line connecting a center point of the lower fixing portion and a lower end edge of the seal line with a 4 th imaginary line connecting the lower inflection point and a lower end edge of the seal line, and the 2 nd imaginary line is longer than the 4 th imaginary line,

a part of the upper end of the mask body is located above the 1 st imaginary line.

6. The mask of any of claims 1, 4, 5 wherein,

the mask body is formed by laminating a plurality of sheets of fiber non-woven fabric formed of thermoplastic synthetic resin,

the sheets are joined to each other only by a welded portion located at the seal line and the peripheral edge of the mask body.

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

the upper end edge of the mask body has a central portion which is convexly curved upward at the central portion in the width direction, and two side portions which are convexly curved downward at both sides of the central portion.

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

the welding parts positioned at both sides of the mouth-nose covering part in the width direction are arranged in a row along the vertical direction,

the central portion of the welded portion arranged in a row in the vertical direction is adjacent to the recessed portion.

9. The mask according to any one of claims 1 to 8,

the mask is suitable for children.

Technical Field

The invention relates to a disposable mask.

Background

Patent document 1 discloses a disposable mask having a mask body formed of a thermoplastic fiber nonwoven fabric and cotton gauze, and a pair of ear loops extending from both side edges of the mask body in a loop shape.

The mask can be easily manufactured by having a shape that is line-symmetric in the vertical direction. In addition, according to the mask, since the mask body has a rectangular shape, it can be easily manufactured.

Disclosure of Invention

Problems to be solved by the invention

The disposable mask disclosed in patent document 1 has a vertically line-symmetric shape, and therefore has a configuration in which the lower end portion of the mask body extends from the lower portion of the chin, and a gap is likely to be generated between the face and the lower end portion of the mask body, and the center portion of the mask body does not cover the gap between the back of the nose and the cheek, and therefore there is a problem 1 in which a gap is likely to be generated between the back of the nose and the cheek.

In the disposable mask disclosed in patent document 1, since the mask body has a rectangular shape, there is a problem 2 that when corners located at both side portions of the mask body come into contact with the skin of the wearer, the skin of the wearer may be strongly irritated.

The present invention has been made in an effort to provide a disposable mask that can prevent a gap from being formed between the lower end of the mask body and the lower part of the chin and also prevent a gap from being formed between the mask body and the back of the nose.

The invention provides a disposable mask which is not likely to strongly irritate the skin of a wearer even if both side portions of a mask body come into contact with the skin.

Means for solving the problems

In order to solve the above-mentioned 1 st object, the 1 st invention is directed to a disposable mask having a vertical direction and a width direction and including a mask body having a nose and mouth covering portion and a pair of ear loops attached to both side portions of the mask body.

The disposable mask of claim 1 is characterized in that both ends of the ear strap part are fixed to the mask body via an upper fixing part and a lower fixing part which are located at the side part of the mask body and spaced apart in the vertical direction, the mask body has a horizontal center line bisecting the vertical dimension, and can be folded via a seal line located at the center in the width direction, the upper end part of the mask body has a shape convexly curved upward at the center in the width direction in a state where the mask body is unfolded, the seal line is curved in a side view in a state where the mask body is folded, and has an upper inflection point located between the upper end edge of the seal line and the horizontal center line and a lower inflection point located below the center point of the lower fixing part between the lower end edge of the seal line and the horizontal center line, and a 1 st imaginary line connecting the center point of the upper fixing part and the upper end edge of the seal line intersects a 2 nd imaginary line connecting the upper end edge of the seal line, the second imaginary line is longer than the first imaginary line, and a part of the upper end of the mask body is located above the first imaginary line 1.

In order to solve the above-mentioned problem 2, the invention 2 is directed to a disposable mask having a vertical direction and a width direction and including a mask body having a nose and mouth covering portion and a pair of ear loops attached to both side portions of the mask body.

The disposable mask of claim 2 is characterized in that both ends of the ear straps are fixed to the mask body via upper and lower fixing portions located at side portions of the mask body and spaced apart in the vertical direction, both side portions of the mask body have a pair of convex portions adjacent to the upper and lower fixing portions, respectively, and protruding toward the rear side, and a concave portion located between the pair of convex portions and recessed toward the front side, and the contours of the pair of convex portions and the concave portion have curved shapes.

The mask bodies according to the first and second aspects of the invention are formed by laminating a plurality of sheets of fiber nonwoven fabric made of thermoplastic synthetic resin, and the sheets are joined to each other only by a welded portion located at the seal line and the peripheral edge of the mask body. Therefore, the mouth-nose covering portion is excellent in flexibility and air permeability.

The upper edge of the mask body according to the first and second inventions 1 and 2 has a central portion that is curved convexly upward at a central portion in the width direction and both side portions that are curved convexly downward at both sides of the central portion. Therefore, even if the mask body is displaced upward during wearing, the upper edge of the mask can be prevented from hitting the eyes by the both side portions.

The mask body of claim 2 has a contour with a smaller radius of curvature than the contours of the pair of projections. Therefore, a small mask can be provided.

The welding portions located on both sides in the width direction of the mouth-nose covering portion of the mask body according to the first and second aspects of the invention are arranged in a row in the vertical direction, and the central portion of the welding portions arranged in a row in the vertical direction is adjacent to the recessed portion. The rigidity of the portion adjacent to the concave portion can be improved while preventing the separation of a plurality of sheets forming the mouth-nose covering portion, and both side portions can be prevented from being lifted from the face when worn.

Since the masks according to the first and second inventions 1 and 2 are for infants, the masks for infants can be provided which exhibit the above-described operation and effect.

Effects of the invention

According to the disposable mask of the invention 1, the 1 st intersection angle formed by the intersection of the 1 st imaginary line connecting the center point of the upper fixing portion and the upper end edge of the seal line and the 2 nd imaginary line connecting the upper corner point and the upper end edge of the seal line is smaller than the 2 nd intersection angle formed by the intersection of the 3 rd imaginary line connecting the center point of the lower fixing portion and the lower end edge of the seal line and the 4 th imaginary line connecting the lower corner point and the lower end edge of the seal line, the 2 nd upper end portion of the mask body has a shape that is convex curved at the center in the width direction, a part of the upper end portion is located above the 1 st imaginary line, and the 3 rd and 2 nd imaginary lines are longer than the 4 th imaginary line. By providing all of these 3 elements, the mask is bonded to the face without any gap.

According to the disposable mask of claim 2, since both side portions of the mask body have a pair of convex portions which are adjacent to the upper fixing portion and the lower fixing portion, respectively, and which protrude rearward, and a concave portion which is located between the pair of convex portions and which is concave forward, and the contours of the pair of convex portions and the concave portion have a curved shape, the wearer's skin is not strongly irritated even if both side portions of the mask body come into contact with the wearer's skin.

Drawings

The drawings show specific embodiments of the present invention, and include not only indispensable structures of the invention but also alternative and preferred embodiments.

Fig. 1 is a side view of a disposable mask according to the present invention in a state in which a mask body is folded.

Fig. 2 is a front view of the mask body in a developed state.

Fig. 3 is a side view of the mask similar to fig. 1.

Fig. 4 is a sectional view taken along the line iv (a) -iv (a) of fig. 2. (b) The side view of the seal line is a phantom line showing each arc forming the shape of the seal line.

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

Fig. 6 is a front view of the mask in a wearing state.

Detailed Description

The following embodiments relate to the disposable mask 10 of the present invention, and include not only the indispensable structure of the present invention but also optional and preferable structures. In fig. 1 and 3, the structure of the left half panel 202 of the mask 10 in the folded state is described, but the same structure is applied to the right half panel 201.

Referring to fig. 1 to 3, a mask 10, which is shown as an example of a disposable mask 10 of the present invention, has a vertical direction Y and a width direction X which intersect (are orthogonal to) each other, and includes a skin-facing surface and a non-skin-facing surface facing the skin-facing surface, a mask body 20, and a pair of loop-shaped ear loops 40 extending from both side edges 20c, 20d of the mask body 20. The mask body 20 has a line Q drawn by an imaginary point bisecting the dimension Y in the vertical direction and a vertical center line P bisecting the dimension X in the width direction, and has a seal line 30 (see fig. 1 to 3) adjacent to the vertical center line P and extending in the vertical direction. The line Q in the present specification is a curve extending in the width direction X drawn by connecting imaginary points that bisect the vertical dimension Y of the upper edge 20a and the lower edge 20b of the mask body 20, which will be described later. Further, the line Q may be a straight line. In the present specification, the center in the width direction X is sometimes referred to as the front, and the end edges in the width direction X are sometimes referred to as the rear, in consideration of the wearing state of the mask body 20.

The mask body 20 has a symmetrical shape with respect to the longitudinal center line P, and includes a right half-face sheet 201 covering the right side of the face of the wearer and a left half-face sheet 202 covering the left side. The inner surfaces of the inner edges positioned on the inner sides in the width direction X of the right half sheet 201 and the left half sheet 202 are bonded to each other via the seal line 30 in a palm shape, and thus the mask 10 has a three-dimensional shape in an unfolded state.

Since the mask 10 is joined in a state where the inner surfaces of the inner edges of the left and right half- body panels 201, 202 are in contact with each other, the inner surfaces of the left and right half- body panels 201, 202 are always in a state of facing each other or/and being in contact with each other. The mask body 20 has a skin-facing surface facing the face of the wearer and a non-skin-facing surface on the opposite side. In the present specification, the skin-facing surface is also referred to as an inner surface, and the non-skin-facing surface is also referred to as an outer surface.

The mask body 20 is formed by laminating a plurality of fibrous nonwoven fabrics, and has an oronasal covering section 21 (filter region) as a section for covering the mouth and nose of the wearer, and both side sections 22. The mask body 20 has an upper end edge 20a, a lower end edge 20b, and both side edges 20c, 20d extending in the vertical direction Y between the upper and lower end edges 20a, 20 b.

The upper edge 20a of the mask body 20 is wavy, and has a central portion 36a curved convexly upward at the central portion in the width direction X and both side portions 36b having a shape curved convexly downward at both sides of the central portion 36 a. Since the upper end edge 20a has such a shape, the upper end portion 27 of the mask body 20 has a convex shape at the center in the width direction X. Both side edges 20c and 20d of the mask body 20 are convexly curved in a bifurcated shape outward in the width direction X, and the lower end edge 20b is formed in a substantially V shape slightly curved downward and extending from both side edges 20c and 20 d.

Mask 10 is a mask for a so-called infant mainly for a low-age layer of 3 to 6 years old, and has a relatively small outer size, and for example, as shown in fig. 2, mask body 20 has a width X dimension W1 of 130 to 190mm and a vertical dimension W2 of 100 to 120 mm. The mask body 20 has a substantially star shape in an unfolded state, and has special design properties different from those of conventional masks for adult use, such as a simple rectangular shape or an elliptical shape. Therefore, the child who is the wearing target person can be given a pleasing impression with rounded corners, and the child can be motivated to buy.

Referring to fig. 2 and 4, the mask body 20 is formed of a plurality of fibrous nonwoven fabrics laminated in a thickness direction Z (intersecting (orthogonal) to the width direction X and the vertical direction Y, respectively), and includes an outer layer sheet 23 forming a non-skin-facing surface of the oronasal covering portion 21, and a 1 st intermediate layer sheet (outer intermediate layer) 24, a 2 nd intermediate layer sheet (inner intermediate layer) 25, and an inner layer sheet 26 laminated in this order from the outer layer sheet 23 on the skin-facing surface side. The inner layer sheet 26 forms a skin-facing surface of the oronasal covering portion 21. The outer layer sheet 23 and the 1 st intermediate layer sheet 24 are smaller in dimension in the width direction X than the 2 nd intermediate layer sheet 25 and the inner layer sheet 26, and both side portions 22 of the mask body 20 are formed of the 2 nd intermediate layer sheet 25 and the inner layer sheet 26.

As shown in fig. 2, the sheets located at the peripheral edge of the mask body 20 are joined to each other by welding portions 38a and 38b arranged at intervals along the peripheral edge. More specifically, the sheets 23, 24, 25, and 26 positioned in the mouth-nose covering portion 21 are joined to each other by the 1 st welded portion 38a, and the 2 nd intermediate layer sheet 25 and the inner layer sheet 26 positioned in the both side portions 22 are joined to each other by the 2 nd welded portion 38 b. An outer peripheral seal region 38 annularly surrounding the mask body 20 is defined by a 1 st welded part 38a and a 2 nd welded part 38 b. Further, since 1 st weld 38a and 2 nd weld 38b are each elliptical in shape, a soft impression can be given to the wearer and the 3 rd person.

On both side portions 21a of the mouth-nose covering portion 21, 3 rd welded portions 39a, 39b arranged at intervals in the vertical direction Y are arranged at intervals in the vertical direction Y, and the sheets 23, 24, 25, 26 are joined to each other. The 3 rd welded parts 39a, 39b can prevent the sheets 23, 24 forming the oronasal covering part 21 from peeling off from the sheets 25, 26. Further, the center portions of the 3 rd welded parts 39a, 39b arranged in a row in the vertical direction Y are adjacent to the concave curved portion 53. Therefore, the rigidity of the portion adjacent to the concave-convex portion 53 can be improved, and the both side portions 22 can be prevented from floating from the face when worn.

The plurality of sheets forming the mask body 20 are joined to each other by a peripheral seal region 38 extending along the outer periphery of the mask body 20. The respective sheets 23 to 26 are joined to each other at both sides in the width direction X of the mouth-nose covering portion 21 by a vertical seal region 39 extending in the vertical direction Y. The vertical sealing region 39 is wavy (curved), and has a curved shape that curves rearward on the upper side and the lower side and curves forward at the center. The curved longitudinal sealing region 39 can give a soft impression to the wearer and the 3 rd person. The vertical seal region 39 may be formed by a 3 rd welded part linearly arranged with an interval.

Referring to fig. 4(a), the outer layer sheet 23 and the outer edges 23a, 24a of the 1 st intermediate layer sheet 24 are positioned further outward in the width direction X than the cross seal region 39, and a dry edge (japanese: ドライエッジ) portion 70 is formed by a part of the outer layer sheet 23 and a part of the 1 st intermediate layer sheet 24 extending outward in the width direction X from the cross seal region 39.

The outer peripheral seal region 38 includes a plurality of welding portions 38a and 38b arranged along the outer peripheral edge of the mask body 20 at intervals. The vertical seal region 39 includes a plurality of welding portions 39a and 39b arranged at intervals in the vertical direction Y of the side portions 21a of the mouth-nose covering portion 21. The welded portion 39b of the vertical seal region 39 is a substantially star-shaped portion having a curved tip, and the welded portion 39a is a circular portion having a different size. Since the welding portions 38a, 38b, 39a, and 39b are formed only by curved portions without tapered portions, it is possible to give the wearer a soft impression that the skin is not irritated even if the skin touches the welding portions 38a, 38b, 39a, and 39b having relatively high rigidity. In addition, since the welded portions 38a, 38b, 39a, 39b are disposed separately from the upper and lower end edges 20a, 20b and the side edges 20c, 20d, the cut ends of the sheets 23 to 26 are not generated when the sheets 23 to 26 are welded, and therefore the cut ends of the sheets 23 to 26 do not irritate the skin. Further, since the welded portions 39a and 39b have design properties, the vertical seal region 39 can also function as a decorative element.

The sheets 23 to 26 are joined to each other only in the peripheral seal region 38 and the longitudinal seal region 39 except for the seal line 30, and are not joined in other portions. Therefore, the mask body 20 is superior in flexibility and air permeability to the case where the entire facing surfaces of the sheets formed by laminating a plurality of fibrous nonwoven fabrics are joined to each other by a joining member such as an adhesive. In the portions where the outer peripheral seal region 38 and the vertical seal region 39 intersect with each other, the welded portions 38a, 38b, 39a, and 39b do not overlap with each other. This suppresses formation of a portion having locally high rigidity due to overlapping of the welded portions.

The mask body 20 is formed of sheets 23 to 26 having a mass of, for example, 10 to 60g/m²The fibrous nonwoven fabric sheet of the thermoplastic synthetic resin having air permeability of (2) can be formed of various known fibrous nonwoven fabrics such as a meltblown fibrous nonwoven fabric, a spunbond fibrous nonwoven fabric, an SMS fibrous nonwoven fabric and a through-air fibrous nonwoven fabric. The 1 st intermediate layer sheet 24 is preferably a fibrous nonwoven fabric having a filter function of blocking passage of fine particles. In addition, the 2 nd intermediate layer sheet 25 preferably uses a fiber nonwoven fabric having a relatively strong sheet strength to function as a base sheet of the mask body 20. Since the inner layer sheet 26 is in contact with the skin of the wearer, a fibrous nonwoven fabric having a good texture is preferably used.

In the present embodiment, for example, the mass of the outer sheet 23 is 35 to 50g/m²The spun-laced fiber nonwoven fabric used as the No. 1 intermediate layer sheet 24 has a mass of 20-30 g/m²The melt-blown fiber nonwoven fabric of (2) as the second intermediate layer sheet 25 is used in mass35～50g/m²The spun-bonded fiber nonwoven fabric used as the inner layer sheet 26 has a mass of 20 to 30g/m²A spunbonded fiber nonwoven fabric.

As shown in fig. 2, each side portion 22 of the mask body 20 includes an upper convex portion (convex portion) 51 extending rearward in a convex manner, a lower convex portion (convex portion) 52, and a concave portion (concave portion) 53 recessed forward between the upper convex portion 51 and the lower convex portion 52. The upper and lower convex curved portions 51, 52 have gentle curved shapes, and the concave curved portion 53 has a steeper curved shape with a smaller curvature radius than the upper and lower convex curved portions 51, 52. The concave curved portion 53 is a portion continuously located between the upper and lower convex curved portions 51, 52 extending in the up-down direction Y, and thus overlaps with a part of them. Since the upper and lower convex portions 51 and 52 and the concave curved portion 53 of the side portions 22 are curved, the skin is not strongly irritated even if the skin is touched. In addition, since the ears of the wearer can be fitted into the concave portions 53, the free portions 42 of the ear loops 40 can be prevented from becoming long, and the mask body 20 can be prevented from being displaced from the face of the wearer in the worn state. The upper and lower convex curved portions 51 and 52 and the concave curved portion are not limited to the curved shape, and may be linear.

TABLE 1

In the mask shown in comparative example 1 of table 1, since the curvature radii of the upper and lower convexly curved portions 51, 52 and the concavely curved portion 53 are small, there are the following problems: the dimension in the longitudinal direction of both end portions 41a, 41b of the ear hook 40 including the concave curved portion 53 with respect to the size of the ear of the wearer (the distance from the lower end of one end portion 41a located above to the upper end of the other end portion 41b located below of the both end portions 41a, 41 b) is too narrow, and there is a problem that both end portions 41a, 41b of the ear hook 40 are strongly in contact with the ear and the center portion of the concave curved portion 53 is separated from the cheek of the wearer (a gap is generated between the center portion of the concave curved portion 53 of the mask and the cheek of the wearer).

In the mask shown in comparative example 2 of table 1, there was a problem that the center portion of the concave curved portion 53 was separated from the cheek of the wearer (a gap was generated between the center portion of the concave curved portion 53 of the mask and the cheek of the wearer).

In the mask shown in comparative example 3 of table 1, since the curvature radius of the concave curved portion 53 is large, there are the following problems: the dimension in the longitudinal direction of both end portions 41a, 41b of the ear loop 40 including the concave curved portion 53 with respect to the size of the ear of the wearer (the distance from the lower end of one end portion 41a located above to the upper end of the other end portion 41b located below of both end portions 41a, 41 b) is too wide, and the center portion of the concave curved portion 53 is separated from the cheek of the wearer (a gap is generated between the center portion of the concave curved portion 53 of the mask and the cheek of the wearer). Further, there is a problem that the mask does not follow the contour line of the wearer's chin, and a gap is generated between the mask body 20 and the wearer's face.

On the other hand, in the masks shown in examples 1 to 3, since the curvature radii of the upper and lower convexly curved portions 51, 52 and the concavely curved portion 53 are set to appropriate values, no gap is formed between the face and the concavely curved portion 53 of the mask body 20, and the mask body 20 is attached to the face. If the mask 10 was not attached to the face and no gap was formed between the mask body 20 and the face, the evaluation was "good", and if no gap was formed between the face and the mask body 20 because the mask 10 was not attached to the face of the wearer, the evaluation was "x (failure)".

Further, the maximum value of the dimension between the both end portions 41a, 41b is preferably 38.5mm or less, depending on the dimension between the both end portions 41a, 41 b. When the dimension between the both end portions 41a and 41b is 38.5mm, the maximum value of the curvature radius of the upper convex curved portion 51 and the lower convex curved portion 52 is 19.25mm, but when the curvature radius of the upper and lower convex curved portions 51 and 52 is 19.25mm, the upper convex curved portion 51 and the lower convex curved portion 52 are in contact with each other, and the concave curved portion 53 cannot be arranged. When 9mm, which is the maximum value of the concave curved portion 53, is secured, the maximum value of the curvature radius of the upper and lower convex curved portions 51 and 52 becomes (38.5mm-9mm) ÷ 2 ═ 14.25mm (about 14 mm).

According to the above evaluation, the radius of curvature of the upwardly convex curved portion 51 is preferably 8 to 14mm, for example. The radius of curvature of the lower convexly curved portion 52 is preferably 8 to 14mm, for example. In addition, the curvature radius of the concave curved portion 53 is preferably 5 to 9 mm.

In order to ensure the results of table 1 and the dry edge portion 70 and to prevent a gap from being generated between the center of the concave curved portion 53 and the cheek of the wearer, the dimension between the longitudinal sealing region 39 and the width direction X of the concave curved portion 53 is preferably 5 to 15 mm.

The ear portion 40 is preferably formed of a known material such as a nonwoven fabric, a woven fabric, a plastic film, a rubber string, or a knitted rubber, and is elastically stretchable. In particular, when the knitted rubber is used for the ear part 40, the ear part 40 is in soft contact with the ear 3 of the wearer without causing a strong pain even if the ear part 40 is wide.

The ear loops 40 have both ends 41a, 41b fixed to the mask body, and free portions 42 extending annularly between the both ends 41a, 41 b. The both ends 41a and 41b of the ear hook 40 are fixed to the mask body 20 on the outer surfaces of the both side portions 22 via an upper fixing portion 61 located at the upper convex curved portion 51 and a lower fixing portion 62 located at the lower convex curved portion 52. In the upper and lower fixing portions 61 and 62, both ends of the ear hooking portion 40 are joined to the mask body 20 by heat welding (see fig. 4 a), and parts of the sheets 25 and 26 forming the mask body 20 are welded and filmed. Since the both end portions 41a, 41b of the ear portion 40 are positioned on the outer surfaces of the both side portions 22, the both side portions 22 can be pressed against the face by the both end portions 41a, 41b when the ear portion 40 is pulled rearward during wearing.

Referring to fig. 3, the upper and lower fixing portions 61 and 62 are rectangles having, for example, four corners formed in a curved shape, and have center points 61a and 62a as intersections of diagonal lines of the rectangles. In addition to the illustrated example, the upper and lower fixing portions 61 and 62 may have a known shape such as a triangle, a square, a polygon, a circle, or an ellipse, and when the upper and lower fixing portions 61 and 62 are circular, the center of the circle is the center point of the upper and lower fixing portions 61 and 62. That is, the center points 61a and 62a of the upper and lower fixing portions 61 and 62 can be said to be the center of gravity of the upper and lower fixing portions 61 and 62.

As shown in fig. 1 and 3, the seal line 30 is curved in a side view of the mask body 20 in a folded state, and has two inflection points 34 and 35. The inflection points 34 and 34 are portions where a curved line intersects a curved line, and do not include portions where a straight line intersects a straight line or a straight line intersects a curved line.

Referring to fig. 4(b), the seal line 30 is defined by, for example, three arcs, a 1 st arc C1 located above, a 2 nd arc C2 located below, and a 3 rd arc C3 located between the 1 st arc C1 and the 2 nd arc C2. The intersection of the 1 st arc C1 and the 3 rd arc C3 is the upper inflection point 34, and the intersection of the 2 nd arc C2 and the 3 rd arc C3 is the lower inflection point 35.

The radius R1 of the 1 st arc C1 is 85 to 100mm, for example, the radius R2 of the 2 nd arc C2 is 50 to 65mm, for example, and the radius R3 of the 3 rd arc C3 is 95 to 110 mm. The radius R3 of the 3 rd circular arc C3 is greater than the radius R1 of the 1 st circular arc C1 and greater than the radius R2 of the 2 nd circular arc C2. Therefore, the central portion of the seal line 30 formed by the 3 rd circular arc C3 has a gentler curved shape than the upper and lower side portions formed by the 1 st circular arc C1 and the 2 nd circular arc C2. In addition, the radius R2 of the 2 nd circular arc C2 is smaller than the radius R1 of the 1 st circular arc C1. Therefore, the upper portion formed by the 1 st circular arc C1 has a gentler curved shape than the lower portion formed by the 2 nd circular arc C2.

Referring to fig. 3, the upper inflection point 34 is located between the upper end edge 30a of the seal line 30 and the line Q. The lower inflection point 35 is located below the center point 62a of the lower fixing portion 62 between the line Q and the lower end edge 30b of the seal line 30.

A 1 st intersection angle θ 1 formed by intersecting a 1 st imaginary line (1 st imaginary line segment) K1 connecting the center point 61a of the upper fixing portion 61 and the upper end edge 30a of the seal line 30 and a 2 nd imaginary line (2 nd imaginary line segment) K2 connecting the upper inflection point 34 and the upper end edge 30a of the seal line 30 is smaller than a 2 nd intersection angle θ 2 formed by intersecting a 3 rd imaginary line (3 rd imaginary line segment) K3 connecting the center point 62a of the lower fixing portion 62 and the lower end edge 30b of the seal line 30 and a 4 th imaginary line (4 th imaginary line segment) K4 connecting the lower inflection point 35 and the lower end edge 30b of the seal line 30.

TABLE 2

Comparative example 1

Example 1

Example 2

Comparative example 2

Comparative example 3

Comparative example 4

Angle theta 1[ ° [ ]]

77

82

87

92

97

102

Determination

×

○

○

×

×

×

In the mask shown in comparative example 1 of table 2, the center portion of the mask body floats up with respect to the nose root, and a gap may be formed between the nose root and the mask body. In the mask shown in comparative example 2 of table 2, the center portion of the mask body may be separated from the lower portion of the nose. In the masks shown in comparative examples 3 to 4 in table 2, the curved portion at the center of the mask body does not match the curve of the nasion, and the upper end of the mask body protrudes above the nasion. On the other hand, in the masks shown in examples 1 to 2, no gap was formed between the both side portions and the lower end portion of the mask body, and the mask body was attached to the face. If the mask was not attached to the face and no gap was formed between the mask body and the face, the evaluation was "good", and if the mask was not attached to the face or a gap was formed between the face and the mask body, the evaluation was "x (failure)". Therefore, the 1 st intersection angle θ 1 is preferably 80 to 90 degrees, for example.

TABLE 3

In the masks shown in comparative examples 1 to 3 in table 3, gaps were formed by the lower portions of both side portions of the mask body located on the sides of the chin floating from the face. In addition, the lower end of the mask body extends from the chin of the wearer, and a gap is formed between the lower end of the mask body and the chin. On the other hand, in the mask shown in comparative example 4 of table 3, the lower end portion of the mask body was lifted from the tip of the chin to form a gap. In addition, the lower end of the mask body extends from the chin of the wearer, and a gap is formed between the lower end of the mask body and the chin. On the other hand, in the masks shown in examples 1 to 2, no gap was formed between the both side portions and the lower end portion of the mask body, and the mask body was attached to the face. If the mask was not attached to the face and no gap was formed between the mask body and the face, the evaluation was "good", and if the mask body was not attached to the face and a gap was formed between the face and the mask body, the evaluation was "poor". Therefore, the 2 nd intersection angle θ 2 is preferably 95 to 105 degrees, for example.

TABLE 4

	Comparative example 1	Example 1	Example 2	Comparative example 2
					The length of the 4 th imaginary line K4 is L2[ mm ]]	10	18	30	40
Evaluation of	×	○	○	×

In the mask shown in comparative example 1 of table 4, since the length L2 of the 4 th virtual line K4 is short, a gap is formed between the lower end portion of the mask body and the chin. In the mask shown in comparative example 2 of table 4, since the size L2 of the 4 th imaginary line K4 is long, the lower end portion of the mask body is protruded from the chin of the wearer, and a gap is formed between the lower end portion of the mask body and the chin. On the other hand, in the masks shown in examples 1 to 2, the lower end of the mask body was bonded to the chin, and no gap was formed between the lower end of the mask body and the chin. If the mask was not attached to the face and no gap was formed between the mask body and the face, the evaluation was "good", and if the mask body was not attached to the face and a gap was formed between the face and the mask body, the evaluation was "poor". Therefore, the length L2 of the 4 th virtual line K4 is preferably 17 to 30mm, for example.

The length L1 of the 2 nd imaginary line K2 is, for example, 10 to 45 mm. The length dimension L1 of the 2 nd imaginary line K2 is greater than the length dimension L2 of the 4 th imaginary line K4.

Referring to fig. 2 and 3, the upper end 27 of the mask body 20 has a convex shape at the center in the width direction X, and a part 27a of the upper end 27 is located above the 1 st imaginary line K1.

For example, in a conventional mask for adults, both side edges have a rectangular shape extending linearly, and the width dimension of the upper end edge of the mask body is the same as the width dimension of the lower end edge. On the other hand, the width dimension of the chin of the wearer's face becomes smaller than the width dimension of the cheeks. In addition, infants have a lower nasion and rounded front ends of the chin and small chin as compared with adults. Therefore, when a mask made of a conventional mask for adult use is simply worn on an infant, the lower end of the mask body extends from the lower part of the chin, and a gap is likely to be formed between the face and the lower end of the mask body. In addition, since the central portion of the mask body cannot cover the space between the back of the nose and the cheek, a gap is easily formed between the back of the nose and the cheek. In addition, in the conventional mask, since the position at which the mask is fixed to the face is not clear, a gap is easily generated between the mask body and the face.

Referring to fig. 5 and 6, when the mask 10 is worn by the wearer, for example, the upper end portion 27 of the mask body 20 is brought into contact with the nasion 4, the free portions 42 of the ear hooking portions 40 are hooked on the ears 3 on both sides, and finally, the mask 10 is worn on the face of the wearer so that the lower end portion 28 of the mask body 20 is brought into contact with the lower portion 2 of the chin so that the tip 1 of the chin faces the lower inflection point 35. When the mask is worn, the upper and lower ends 27, 28 of the mask body 20 are bent rearward, i.e., toward the face, by pulling the side portions 22 rearward. The upper and lower inflection points 34, 35 function as starting points of the bending, and a space S where the nostril and the mouth 5 are located is defined between the upper and lower inflection points 34, 35.

In the mask 10 of the present invention, as shown in fig. 3, a 1 st imaginary line K1 connecting the center point 61a of the upper fixing portion 61 and the upper end edge 30a of the seal line 30 and a 2 nd imaginary line K2 connecting the upper inflection point 34 and the upper end edge 30a of the seal line 30 intersect each other to form a 1 st intersection angle θ 1 smaller than a 2 nd intersection angle θ 2 connecting the center point 62a of the lower fixing portion 62 and the lower end edge 30b of the seal line 30 and a 4 th imaginary line K3 connecting the lower inflection point 35 and the upper end edge 30b of the seal line 30 and a 4 th imaginary line K4 intersect each other (element 1).

Accordingly, the upper inflection point 34 is located at a position facing forward from the center point 61a of the upper fixing portion 61 and at a higher position of the seal line 30, and the upper end portion 27 also fits to the nose of an infant whose nose bridge is shorter than that of an adult. Further, since the lower inflection point 35 is located below the lower fixing portion 62 and at a lower position of the seal line 30, the lower end portion 28 is attached to face the chin of the child having a circular shape so as to spread laterally.

The upper end 27 of the mask body 20 has a convex shape at the center in the width direction X, and a part 27a of the upper end 27 is located above the 1 st virtual line K1 (element 2). Since the base of the nose 4 of the infant has a shape that is laterally expanded lower than that of the adult, when the upper end portion 27 is located below the 1 st imaginary line K1, a part of the base of the nose 4 may be exposed to the outside, causing a gap between the mask body 20 and the face. In the present embodiment, by positioning the part 27a of the upper end portion 27 above the 1 st imaginary line K1, the entire lateral side portion of the nasion 4 can be covered, and the formation of a gap between the mask body 20 and the face can be suppressed. In addition, since the upper end portion 27 has a curved shape, no stimulus is applied even if it contacts the nasion 4.

Further, the 2 nd virtual line K2 is longer than the 4 th virtual line K4 (element 3). Thus, in the worn state, the upper end portion 27 is in contact with the entire back of the nose, and the lower end portion 28 does not protrude sharply downward below the chin to form a gap, or the mask body 20 is not elongated vertically when viewed from the front, giving an impression of being longer than the actual face.

As described above, by providing all of these three elements, the seal line 30 can provide the mask 10 having the space S in front of the mouth 5 and being fitted to the face of an infant whose nose root 4 is lower than an adult, whose chin tip 1 is rounded, and whose chin width is narrow without any gap. In addition, since the mask 10 is worn such that the lower end portion 28 of the mask body 20 is in contact with the lower portion 2 of the chin, with the tip 1 of the chin facing the lower inflection point 35, the position of the mask 10 fixed to the face becomes clear. By wearing the mask 10 at the correct position, a gap is less likely to be generated between the mask body 20 and the face, and the mask body 20 can be prevented from being displaced from the face during wearing. The above-described operation and effect cannot be achieved in a mask in which a conventional adult mask, which is simply reduced in size and is foldable only by inclining the upper edge and the lower edge of the mask body with respect to the width direction and the upper and lower sides thereof, is foldable via a seal line located at the center in the width direction.

The both side edges of the conventional mask are difficult to be adhered to each other along the curved cheek portion of the wearer, and a gap is likely to be generated between the mask and the face. In particular, a portion between the upper and lower fixing portions pressed against the face by the pulling force of the ear hook portion is easily lifted from the face. On the other hand, in the mask 10 of the present invention, since the non-existing region 54 where the welding portions 38a, 38b, 39a, 39b are not present is disposed in the portion adjacent to the upper and lower fixing portions 61, 62, the periphery of the upper and lower fixing portions 61, 62 has appropriate flexibility, and on the other hand, since the welding portions 38b, 39a, 39b are disposed in the form adjacent to and surrounding the non-existing region 54, the welding portions 38b, 39a, 39b located in the periphery of the non-existing region 54 have appropriate rigidity, and thus the both side portions 22 including the concave curved portion 53 can be prevented from floating from the face of the wearer. In particular, the concave curved portion 53 is curved concavely in the forward direction, and the center portion of the concave curved portion 53 is located more inward than the innermost both ends of the upper and lower fixing portions 61 and 62, so that the periphery of the upper and lower fixing portions 61 and 62 is easily deformed, and even when the face is moved relative to the trunk, the mask body 20 can be prevented from being displaced from the face, and the both side portions 22 can be prevented from being lifted from the face by the welding portions 38b, 39a, and 39 b. Further, the non-existing region 54 is also present at a portion of the concave curved portion 53 closest to the longitudinal seal region 39, and the non-existing region 54 is continuous in the vertical direction, whereby the above-described operation and effect can be reliably exhibited.

Since the upper edge 20a and the lower edge 20b of the mask body 20 do not include an acute angle portion but are linear or curved, the wearer and the 3 rd person can be given a soft impression. In addition, since the upper and lower convex curved portions 51, 52 and the concave curved portion 53 of the side portions 22 are curved, the skin is not strongly irritated even if the skin is touched.

The upper end edge 20a of the mask body 20 is defined by a central portion 36a extending in each direction of the width direction X from above the seal line 30 and a pair of opposite side portions 36b extending in the width direction X from the end portions of the central portion 36a, and the opposite side portions 36b are curved so that the center in the width direction X is depressed downward, and therefore, even if the mask body 20 is displaced upward during wearing, the upper end edge 20a of the mask 10 can be prevented from hitting the eyes 6. Therefore, in addition to the actions and effects of the 2 nd to last stages on pages 15 to 16, the mask 10 can be attached to the periphery of the nose of a child with a low nasion root to prevent a gap from being generated between the upper end portion 27 of the mask body 20 and the face, and the upper end edge 20a of the mask 10 can be prevented from hitting the eyes 6 of the face of the child with a high cheek.

Although not shown, as another embodiment of the mask 10, decorative elements such as patterns, characters, letters, symbols, and signs may be arranged in a single dot on the outer surface of the lower portion of the mask body 20 by printing. The decorative element can improve the design and also function as a recognition element for notifying the wearer of the upper and lower positions of the mask 10. In particular, since the mask 10 has a special outer shape different from the conventional mask, the upper and lower sides cannot be instantly recognized, and thus the recognition element can be said to effectively function. In addition, from the viewpoint of improving the design, for example, a decorative design that simulates a human may be performed in accordance with the shape of the mask body 20. Of course, the decorative element is not limited to a single-point decorative element as long as it has the above-described function, and may be disposed on the entire oronasal covering portion 21 or the entire mask body 20.

Further, as shown in fig. 2, when the dimension L4 of the center points 61a of the upper fastening parts 61 is larger than the length dimension L3 of the center points 62a of the lower fastening parts 62 in the state where the mask body 20 is spread out, the distance between the upper fastening parts 61 of the upper end portion 27 of the mask body 20 can be increased, the space S can be increased, and the mask 10 can be attached to the face of a child whose ear 3 is positioned lower than that of an adult. The state in which the mask body 20 is spread out means a state in which, when the mask body 20 is placed on a flat object, the portion of the mask body 20 other than the vicinity of the seal line 30 is parallel to the upper surface of the flat object.

As the members constituting the mask 10, any known materials generally used in the art can be used without limitation, except for the materials described in the present specification, unless otherwise specified. In addition, the terms "1 st" and "2 nd" and the like used in the present specification are used only for distinguishing the same elements, positions and the like.

Description of the reference numerals

10 Disposable mask

20 mask body

21 nose and mouth covering part

22 two side parts

23 outer layer tablet (tablet)

24 th 1 intermediate layer sheet

25 nd 2 middle layer sheet

26 inner layer sheet (sheet)

27 upper end portion

30 sealing line

30a upper end edge

30b lower end edge

34 upper inflection point

35 lower inflection point

36a central part

36b at both side parts

38a 1 st deposit (deposit)

38b 2 nd deposit (deposit)

39a 3 rd deposited part (deposited part)

39b 3 rd deposited part (deposited part)

40 hanging ear part

51 convex curved part (convex part)

52 lower convex curved part (convex part)

53 concave curved part (concave part)

61 upper fixing part

62 lower fixing part

61a (of the upper fixing part)

62a (of the lower fixing portion)

K1 th imaginary line 1

K2 2 nd imaginary line

K3 No. 3 imaginary line

K4 th imaginary line 4

L1 Length dimension of 2 nd imaginary line K2

L2 Length dimension of 4 th imaginary line K4

Q line (horizontal central line)

In the X width direction

Y vertical direction

Theta 1 st intersection angle

Theta 2 nd angle of intersection