JP7058540B2 - Disposable mask - Google Patents

Description

The present invention relates to a disposable mask.

Patent Document 1 discloses a disposable mask having a mask body formed of a thermoplastic fibrous nonwoven fabric and cotton gauze, and a pair of ear hooks extending from both side edges of the mask body in an annular shape.

According to this mask, the mask body can be easily manufactured by having a rectangular shape.

Utility Model Registration No. 3073350 (U3073350)

In the disposable mask disclosed in Patent Document 1, since the mask body has a rectangular shape, when the corners located on both sides of the mask body come into contact with the wearer's skin, the wearer's skin is strongly stimulated. There was a risk of doing so.

An object of the present invention is to provide a disposable mask that does not strongly irritate the wearer's skin even if both sides of the mask body come into contact with the skin.

In order to solve the above-mentioned problems, the present invention is a disposable mask including a mask body having a vertical direction and a width direction and having a mouth and nose covering part, and a pair of ear hooks attached to both sides of the mask body. Is targeted.

In the disposable mask according to the present invention , the mask body has a horizontal center line that divides the vertical dimension into two equal parts, and can be folded via a seal line located at the center in the width direction. Both ends of the part are fixed to the mask body via the upper fixing part and the lower fixing part which are located on the side part of the mask body and are separated in the vertical direction, and both sides of the mask body are attached to the upper fixing part and the lower fixing part. Each of them has a pair of convex portions that are adjacent to each other and protrudes toward the rear side, and a concave portion that is located between the pair of convex portions and is recessed toward the front side, and the contour of the pair of convex portions and the concave portion is curved. The mask body has a shape, and the mask body is formed by laminating a plurality of sheets of fibrous nonwoven fabric formed of a thermoplastic synthetic resin, and the sheets are formed by laminating a plurality of sheets of fibrous non-woven fabric, and the sheets are formed from each other only by a seal line and a welded portion located on the peripheral edge of the mask body. A non-existing area where the welded portion does not exist is arranged in the upper fixed portion and the portion adjacent to the lower fixed portion, and the welded portion is arranged in a manner adjacent to and surrounding the non-existing area. It is characterized by being.

The radius of curvature of the contour of the concave portion of the mask body is smaller than the radius of curvature of the contour of the pair of convex portions. Therefore, a small mask can be provided.

The welded portions located on both sides of the mouth and nose cover portion of the mask body in the width direction are arranged in a row in the vertical direction, and the central portion of the welded portions arranged in a row in the vertical direction is adjacent to the recess. It is possible to prevent the multiple sheets forming the mouth and nose cover from peeling off, and it is possible to improve the rigidity of the portion adjacent to the recess, and prevent both sides from rising from the face when worn. be able to.

Both ends of the ear hook of the mask body are fixed to the mask body via the upper fixing part and the lower fixing part which are located on the side part of the mask body and are separated in the vertical direction, and the mask body has a dimension of 2 in the vertical direction. It has a horizontal center line that divides evenly and can be folded via a seal line located in the center of the width direction. In the unfolded state of the mask body, the upper end of the mask body is at the center of the width direction. It has an upwardly curved shape, and the seal line is curved in the side view with the mask body folded, and is an inflection point located between the upper edge of the seal line and the lateral center line. And a lower inflection point located below the center point of the lower fixing portion between the lower end edge of the seal line and the horizontal center line, and the center point of the upper fixing portion and the upper end edge of the seal line. The first intersection angle formed by the intersection of the first virtual line connecting the upper inflection point and the upper end edge of the seal line is the first connecting the center point of the lower fixed portion and the lower end edge of the seal line. It is smaller than the second intersection angle formed by the intersection of the third virtual line, the lower inflection point, and the lower end edge of the seal line, and the second virtual line is longer than the fourth virtual line. A part of the upper end of the main body is located above the first virtual line. In other words, first, the first virtual line connecting the center point of the upper fixed portion and the upper end edge of the seal line and the second virtual line connecting the upper inflection point and the upper end edge of the seal line intersect. The first crossing angle is such that the third virtual line connecting the center point of the lower fixed portion and the lower end edge of the seal line and the fourth virtual line connecting the lower inflection point and the lower end edge of the seal line intersect. Secondly, the upper end of the mask body has a convex shape in the center in the width direction, and a part of the upper end is located above the first virtual line. Third, the second virtual line is longer than the fourth virtual line. By meeting all three requirements, the mask fits tightly on the face.

The upper end edge of the mask body has a central portion that is convex upward in the central portion in the width direction, and a bilateral portion that has a shape that is convex downward on both sides of the central portion. Therefore, even if the mask body is displaced upward while being worn, it is possible to prevent the upper end edge of the mask from hitting the eyes due to both side portions.

Since the mask is for infants, it is possible to provide a mask for infants that exhibits the above-mentioned actions and effects.

According to the disposable mask according to the present invention, both side portions of the mask body are located between a pair of convex portions adjacent to the upper fixed portion and the lower fixed portion and projecting toward the rear side, and a pair of convex portions. Since it has a concave portion that dents toward the front side and the contour of the pair of convex portions and the concave portion has a curved shape, even if both sides of the mask body come into contact with the wearer's skin, the wearer There is no risk of strong irritation to the skin.

The drawings show particular embodiments of the invention and include not only the essential configurations of the invention, but also selective and preferred embodiments.
A side view of the disposable mask according to the present invention in a folded state. Front view of the mask body unfolded. The same side view of the mask as FIG. FIG. 2 is a cross-sectional view taken along the line IV (a) -IV (a) of FIG. (B) A side view of the seal line showing each arc forming the shape of the seal line as a virtual line. Side view of the mask in the wearing state. Front view of the mask in the wearing state.

The following embodiments include not only the essential configurations of the invention but also selective and preferred configurations with respect to the disposable mask 10 according to the present invention. 1 and 3 describe the configuration of the left half panel 202 in the folded state of the mask 10, but the right half panel 201 also has the same configuration.

Referring to FIGS. 1 to 3, the mask 10, which is shown as an example of the disposable mask 10 of the present invention, has a vertical direction Y and a width direction X that intersect (orthogonally) with each other, and has a skin facing surface and a non-skin facing surface thereof. It includes a skin-facing surface, a mask body 20, and a pair of annular ear hooks 40 extending from both side edges 20c and 20d of the mask body 20. The mask body 20 has a line Q defined by a virtual point that divides the dimension of the vertical direction Y into two equal parts and a vertical center line P that divides the dimension of the width direction X into two equal parts, and is adjacent to the vertical center line P. It has a seal line 30 extending in the vertical direction (see FIGS. 1 to 3). The line Q in the present specification is a curve extending in the width direction X defined by connecting virtual points that divide the dimensions of the upper end edge 20a and the lower end edge 20b of the mask body 20 in the vertical direction Y into two equal parts. be. The line Q may be a straight line. Further, in the present specification, in consideration of the wearing state of the mask body 20 , the center of the width direction X may be referred to as the front, and the edge of the width direction X may be referred to as the rear.

The mask body 20 has a symmetrical shape with respect to the vertical axis P, and has a right half panel 201 covering the right side of the wearer's face and a left half panel 202 covering the left side. The inner surfaces of the inner edges of the right half panel 201 and the left panel 202 located inside in the width direction X are joined to each other in a palm-shaped manner via the seal line 30, so that the mask 10 is in an unfolded state. It has a three-dimensional aspect.

Since the mask 10 is joined in a state where the inner surfaces of the inner edges of the left and right half panels 201 and 202 are in contact with each other, the inner surfaces of the left and right half panels 201 and 202 always face each other or / and It is in a state of contact. The mask body 20 has a skin-facing surface facing the wearer's face and a non-skin-facing surface located 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 main body 20 is formed by laminating a plurality of fibrous nonwoven fabrics, and has a mouth-nose covering portion 21 (filter region) which is a portion covering the wearer's mouth and nose, and both side portions 22. The mask main body 20 has an upper end edge 20a, a lower end edge 20b, and both side edges 20c and 20d extending in the vertical direction Y between the upper and lower end edges 20a and 20b.

The upper end edge 20a of the mask body 20 is wave-shaped, and has a central portion 36a that is convex upward in the central portion in the width direction X and a bilateral portion 36b that is convex downward on both sides of the central portion 36a. And have. By having such a shape that the upper end edge 20a is applied, the upper end portion 27 of the mask main body 20 has a convex shape in the central portion in the width direction X. The both side edges 20c and 20d of the mask body 20 have a bifurcated shape extending outward in the width direction X, and the lower end edge 20b is a substantially V-shape extending downward from both side edges 20c and 20d. It has a shape.

The mask 10 is a so-called infant mask mainly intended for younger age groups from 3 to 6 years old, and has relatively small external dimensions. With reference to FIG. 2, for example, in the width direction of the mask body 20. The dimension W1 of X is 130 to 190 mm, and the dimension W2 in the vertical direction is 100 to 120 mm. The mask body 20 has a substantially star shape in the unfolded state, and has a peculiar design property different from that of a conventional mask for adults, which has a simple rectangular shape, an elliptical shape, and the like. Therefore, it is possible to give a rounded and cute impression to the infant who is the wear target and motivate the purchase.

Referring to FIGS. 2 and 4, the mask body 20 is formed of a plurality of fibrous nonwoven fabrics laminated in the thickness direction Z (intersecting (orthogonally) in the width direction X and the vertical direction Y, respectively), and has a mouth. The outer layer sheet 23 forming the non-skin facing surface of the nose covering portion 21, the first intermediate layer sheet (outer intermediate layer) 24, and the second intermediate layer sheet (inner side) laminated on the skin facing surface side in order from the outer layer sheet 23. It has an intermediate layer) 25 and an inner layer sheet 26. The inner layer sheet 26 forms the skin-facing surface of the mouth-nose covering portion 21. The outer layer sheet 23 and the first intermediate layer sheet 24 have smaller dimensions in the width direction X than the second intermediate layer sheet 25 and the inner layer sheet 26, and both side portions 22 of the mask body 20 are the second intermediate layer sheet 25 and the inner layer sheet. It is formed from 26.

As shown in FIG. 2, the sheets located on the peripheral edge of the mask main 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, 26 located at the mouth and nose covering portion 21 are joined to each other by the first welding portion 38a, and the second intermediate layer sheet 25 and the inner layer sheet 26 located at both side portions 22 are joined to each other. Are joined to each other by a second welded portion 38b. The outer peripheral sealing area 38 that surrounds the mask body 20 in an annular shape is defined by the first welding portion 38a and the second welding portion 38b. Further, since each of the first welded portion 38a and the second welded portion 38b has an elliptical shape, it is possible to give a soft image to the wearer and a third party.

On both side portions 21a of the mouth and nose covering portion 21, third welding portions 39a and 39b arranged at intervals in the vertical direction Y are arranged at intervals along the vertical direction Y, and the sheets 23, 24, 25 are arranged. , 26 are joined to each other. The third welded portions 39a and 39b can prevent the sheets 23 and 24 forming the mouth and nose covering portion 21 from peeling off from the sheets 25 and 26. Further, the central portion of the third welded portions 39a and 39b arranged in a row in the vertical direction Y is adjacent to the concave portion 53. Therefore, the rigidity of the portion adjacent to the concave portion 53 can be improved, and it is possible to prevent the both side portions 22 from rising from the face when worn.

The plurality of sheets forming the mask body 20 are joined to each other by an outer peripheral sealing area 38 extending along the outer peripheral edge of the mask body 20. Further, the sheets 23 to 26 are joined to each other by a longitudinal seal area 39 extending in the vertical direction Y on both sides of the mouth and nose covering portion 21 in the width direction X. The longitudinal seal area 39 is wave-shaped (curved) and has a curved shape that is convex backward and convex forward in the center on the upper side and the lower side. The curved longitudinal seal area 39 can give the wearer and a third party a soft image. The longitudinal seal area 39 may be formed by a third welded portion arranged linearly at intervals.

Referring to FIG. 4A, the outer edges 23a and 24a of the outer layer sheet 23 and the first intermediate layer sheet 24 are located outside the longitudinal seal area 39 in the width direction X, and have a width from the longitudinal seal area 39. The dry edge portion 70 is formed by a part of the outer layer sheet 23 extending outward in the direction X and a part of the first intermediate layer sheet 24.

The outer peripheral sealing area 38 has a plurality of welded portions 38a and 38b arranged at intervals along the outer peripheral edge of the mask main body 20. The longitudinal seal area 39 has a plurality of welded portions 39a, 39b arranged at intervals in the vertical direction Y of both side portions 21a of the mouth and nose covering portion 21. The welded portion 39b of the longitudinal seal area 39 has a substantially star shape with a curved tip, and the welded portion 39a has a circular shape having different sizes. Since each welded portion 38a, 38b, 39a, 39b does not have a pointed portion and is formed only from a curved portion, each welded portion having relatively high rigidity with respect to the wearer. It is possible to give a flexible impression that no irritation is given even if the skin hits 38a, 38b, 39a, 39b. In addition, since each of the welded portions 38a, 38b, 39a, 39b is located away from the upper and lower end edges 20a, 20b and both side edges 20c, 20d, when the sheets 23 to 26 are welded, the pieces of the sheets 23 to 26 are separated. Since it does not occur, the pieces of the sheets 23 to 26 do not irritate the skin. Further, since the welded portions 39a and 39b have a design property, the longitudinal seal area 39 can also function as a decorative element.

The sheets 23 to 26 are joined to each other only in the outer peripheral seal area 38 and the longitudinal seal area 39, except for the seal line 30, and are not joined in other portions. Therefore, the mask body 20 is excellent in flexibility and breathability as compared with 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 means such as an adhesive. Further, in the portion where the outer peripheral seal area 38 and the longitudinal seal area 39 intersect with each other, the welded portions 38a, 38b, 39a, 39b do not overlap each other. As a result, it is possible to prevent the formation of a locally highly rigid portion due to the overlapping of the welded portions with each other.

The sheets 23 to 26 forming the mask body 20 are, for example, thermoplastic synthetic resin fiber nonwoven fabric sheets having a mass of 10 to 60 g / m ² and having a mass of 10 to 60 g / m 2, such as melt blown fiber nonwoven fabric, spunbonded nonwoven fabric, and SMS fiber nonwoven fabric. And can be formed from various known fibrous nonwoven fabrics such as air-through fibrous nonwoven fabrics. For the first intermediate layer sheet 24, it is preferable to use a fibrous nonwoven fabric having a filter function of blocking the passage of fine particles. Further, it is preferable to use a fibrous nonwoven fabric having a relatively high sheet strength for the second intermediate layer sheet 25 so as to function as a base sheet of the mask main body 20. Since the inner layer sheet 26 comes into contact with the wearer's skin, it is preferable to use a fibrous nonwoven fabric having a good touch.

In the present embodiment, for example, a spunlace fiber nonwoven fabric having a mass of 35 to 50 g / m ² is used as the outer layer sheet 23, and a melt blown fiber nonwoven fabric having a mass of 20 to 30 g / m ² is used as the first intermediate layer sheet 24. As the second intermediate layer sheet 25, a spunbond fiber nonwoven fabric having a mass of 35 to 50 g / m ² is used, and as the inner layer sheet 26, a spunbond fiber nonwoven fabric having a mass of 20 to 30 g / m ² is used.

As shown in FIG. 2, the side portions 22 of the mask main body 20 have an upward convex curved portion (convex portion) 51 extending backward in a convex shape, a downward convex curved portion (convex portion) 52, and an upward convex curved portion 51. It has a concave portion (concave portion) 53 that is concave forward between the lower convex curved portion 52 and the lower convex curved portion 52. The vertically convex curved portions 51 and 52 have a gentle curved shape, and the concave curved portion 53 has a smaller radius of curvature than the vertically convex curved portions 51 and 52 and has a sharp curved shape. Since the concave curved portion 53 is a portion located between the vertically convex curved portions 51 and 52 that continuously extend in the vertical direction Y, it overlaps with a part thereof. Since the upward convex curved portion 51, the downward convex curved portion 52, and the concave curved portion 53 on both side portions 22 are all curved, they do not strongly irritate the skin even if they touch the skin. In addition, since the wearer's ears can be inserted into the concave portion 53, the free portion 42 of the ear hook portion 40 is prevented from becoming long, and the mask body 20 is displaced from the wearer's face in the wearing state. Can be suppressed. The vertically convex curved portions 51 and 52 and the concave curved portion are not limited to a curved shape, and may be a straight shape.

In the mask shown in Comparative Example 1 of Table 1, since the radius of curvature of the vertically convex curved portions 51 and 52 and the concave curved portion 53 is small, the ear hook portion including the concave portion 53 with respect to the size of the wearer's ear. Vertical dimensions of both ends 41a, 41b in 40 (distance between the lower end of one end 41a located above and the upper end of the other end 41b located below) in both ends 41a, 41b. Is too narrow, there is a problem that both end portions 41a and 41b of the ear hook portion 40 come into strong contact with the ear, and the central portion of the concave portion 53 is separated from the wearer's cheek (the concave portion 53 of the mask). There was also a problem (a gap was created between the center of the song and the wearer's cheeks).

In the mask shown in Comparative Example 2 of Table 1, the central portion of the concave portion 53 is separated from the wearer's cheek (a gap is generated between the central portion of the concave portion 53 of the mask and the wearer's cheek. ) There was a problem.

In the mask shown in Comparative Example 3 of Table 1, since the radius of curvature of the concave portion 53 is large, both ends 41a and 41b of the ear hook portion 40 including the concave portion 53 with respect to the size of the wearer's ear The vertical dimension (distance between the lower end of one end 41a located above and the upper end of the other end 41b located below) is too wide, and the concave portion 53 has a concave portion 53. There was a problem that the central portion was separated from the wearer's cheek (a gap was generated between the central portion of the concave portion 53 of the mask and the wearer's cheek). Further, there is a problem that the mask does not follow the 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 radius of curvature of the vertically convex curved portions 51 and 52 and the concave curved portion 53 has an appropriate size, the space between the face and the concave portion 53 of the mask main body 20 is reached. No gap was generated, and the mask body 20 was fitted to the face. The evaluation was "○ (good)" if the mask 10 fits the face and there is no gap between the mask body 20 and the face, and the mask 10 does not fit the wearer's face. If there was a gap between the face and the mask body 20, it was marked as "x (impossible)".

Further, from the dimension between both end portions 41a and 41b, the maximum value of the dimension between both end portions 41a and 41b is preferably 38.5 mm or less. When the dimension between both ends 41a and 41b is 38.5 mm, the maximum value of the radius of curvature of the upward convex curved portion 51 and the downward convex curved portion 52 is 19.25 mm, but the vertical convex curved portions 51 and 52. If the radius of curvature of is 19.25 mm, the upward convex curved portion 51 and the downward convex curved portion 52 come into contact with each other, and the concave curved portion 53 cannot be arranged. When the maximum value of 9 mm of the concave curved portion 53 is secured, the maximum value of the radius of curvature of the vertically convex curved portions 51 and 52 is (38.5 mm-9 mm) ÷ 2 = 14.25 mm (about 14 mm).

From the above evaluation, the radius of curvature of the upward convex curved portion 51 is preferably, for example, 8 to 14 mm. The radius of curvature of the downwardly convex curved portion 52 is preferably, for example, 8 to 14 mm. The radius of curvature of the concave portion 53 is preferably 5 to 9 mm.

The dimensions of the width direction X between the longitudinal seal area 39 and the concave portion 53 are the results shown in Table 1 and the gap between the central portion of the concave portion 53 and the wearer's cheek while ensuring the dry edge portion 70. 10 to 15 mm is preferable in order to prevent the occurrence of.

The ear hook portion 40 is preferably elastically stretchable, and is formed of a known material such as a non-woven fabric, a woven fabric, a plastic film, a rubber string, and a woven rubber. In particular, when the woven rubber is used for the ear hook portion 40, even if the ear hook portion 40 is relatively wide, there is no possibility of flexibly contacting the wearer's ear 3 and causing strong pain.

The ear hook portion 40 has both end portions 41a and 41b fixed to the mask main body and a free portion 42 extending in an annular shape between both end portions 41a and 41b. Both end portions 41a and 41b of the ear hook portion 40 are masked via an upper fixing portion 61 located on the upper convex curved portion 51 and a lower fixing portion 62 located on the lower convex curved portion 52 on the outer surface of both side portions 22. It is fixed to the main body 20. In the upper and lower fixing portions 61 and 62, both ends of the ear hook portion 40 and the mask body 20 are joined by heat welding (see FIG. 4A), and a part of the sheets 25 and 26 forming the mask body 20 is formed. It is welded and made into a film. Further, since both end portions 41a and 41b of the ear hook portion 40 are located on the outer surface of both side portions 22, when the ear hook portion 40 is pulled backward during wearing, both end portions 22a and 41b face the both end portions 22. Can be pressed against.

Referring to FIG. 3, the upper and lower fixed portions 61 and 62 are, for example, a rectangle having four corners curved, and have center points 61a and 62a which are intersections of diagonal lines of the rectangle. In addition to the illustrated examples, the upper and lower fixing portions 61 and 62 may have known shapes such as a triangle, a square, a polygon, a circle, and 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 fixed portions 61 and 62. That is, it can be said that the center points 61a and 62a of the upper and lower fixing portions 61 and 62 are the centers of gravity of the upper and lower fixing portions 61 and 62.

As shown in FIGS. 1 and 3, the seal line 30 is curved in a side view in a folded state and has two inflection points 34 and 35. Here, the inflection points 34 and 34 are the portions where the curve and the curve intersect, and do not include the portion where the straight line and the straight line or the straight line and the curve intersect.

Referring to FIG. 4B, the seal line 30 is located between, for example, three arcs, a first arc C1 located above, a second arc C2 located below, a first arc C1 and a second arc C2. It is defined by the located third arc C3. The intersection of the first arc C1 and the third arc C3 is the upper inflection point 34, and the intersection of the second arc C2 and the third arc C3 is the lower inflection point 35.

The radius R1 of the first arc C1 is, for example, 85 to 100 mm, the radius R2 of the second arc C2 is, for example, 50 to 65 mm, and the radius R3 of the third arc C3 is, for example, 95 to 110 mm. .. The radius R3 of the third arc C3 is larger than the radius R1 of the first arc C1 and larger than the radius R2 of the second arc C2. Therefore, the central portion of the seal line 30 formed by the third arc C3 has a gentle curve shape as compared with the upper and lower portions formed by the first and second arcs C1 and C2. Further, the radius R2 of the second arc C2 is smaller than the radius R1 of the first arc C1. Therefore, the upper portion formed by the first arc C1 has a gentle curve shape as compared with the lower portion formed by the second 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 lower end edge 30b of the seal line 30 and the line Q.

Further, the first virtual line (first virtual 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 the upper inflection point 34 and the upper end edge 30a of the seal line 30 are connected. The first inflection angle θ1 formed by intersecting the second virtual line (second virtual line segment) K2 to be connected is the third virtual line (third) connecting the center point 62a of the lower fixed portion 62 and the lower end edge 30b of the seal line 30. It is smaller than the second intersection angle θ2 formed by the intersection of the 3 virtual line segment) K3 and the 4th virtual line (4th virtual line segment) K4 connecting the inflection point 35 and the lower end edge 30b of the seal line 30.

In the mask shown in Comparative Example 1 in Table 2, the central portion of the mask body is raised with respect to the nose root, and there is a possibility that a gap may be formed between the nose root and the mask body. In the mask shown in Comparative Example 2 in Table 2, the central portion of the mask body may be separated from the lower part of the nose. Further, 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 nose root, and the upper end portion of the mask body protrudes above the nose root. rice field. On the other hand, in the masks shown in Examples 1 and 2, no gaps were generated on both sides and the lower end of the mask body, and the mask body was fitted to the face. The evaluation is "○ (good)" if the mask fits the face and there is no gap between the mask body and the face, and if it does not fit or there is a gap between the face and the mask body. If is occurring, it is marked as "x (impossible)". Therefore, the first intersection angle θ1 is preferably 80 to 90 degrees, for example.

In the masks shown in Comparative Examples 1 to 3 in Table 3, the lower portions of both sides of the mask body located on the side of the chin were raised from the face, and a gap was formed. In addition, the lower end of the mask body protrudes from the wearer's lower jaw, and a gap is created between the lower end of the mask body and the lower jaw. On the other hand, in the mask shown in Comparative Example 4 in Table 3, the lower end of the mask body was raised from the tip of the jaw, and a gap was formed. In addition, the lower end of the mask body protrudes from the wearer's lower jaw, and a gap is created between the lower end of the mask body and the lower jaw. On the other hand, in the masks shown in Examples 1 and 2, no gaps were generated on both sides and the lower end of the mask body, and the mask body was fitted to the face. The evaluation is "○ (good)" if the mask fits the face and there is no gap between the mask body and the face, and the mask body does not fit the face and the face and the mask body are evaluated. If there was a gap between them, it was marked as "x (impossible)". Therefore, the second intersection angle θ2 is preferably, for example, 95 to 105 degrees.

Further, in the mask shown in Comparative Example 1 in Table 4, since the length dimension L2 of the fourth virtual line K4 is short, a gap is generated between the lower end portion of the mask body and the lower jaw. In the mask shown in Comparative Example 2 of Table 4, since the dimension L2 of the fourth virtual line K4 is long, the lower end of the mask body protrudes from the wearer's lower jaw, and the space between the lower end of the mask body and the lower jaw There is a gap in the. On the other hand, in the masks shown in Examples 1 and 2, the lower end portion of the mask body and the lower jaw were fitted, and no gap was formed between the lower end portion of the mask body and the lower jaw. The evaluation is "○ (good)" if the mask fits the face and there is no gap between the mask body and the face, and the mask body does not fit the face and the face and the mask body are evaluated. If there was a gap between them, it was marked as "x (impossible)". Therefore, the length dimension L2 of the fourth virtual line K4 is preferably 17 to 30 mm, for example.

The length dimension L1 of the second virtual line K2 is, for example, 10 to 45 mm. The length dimension L1 of the second virtual line K2 is larger than the length dimension L2 of the fourth virtual line K4.

Referring to FIGS. 2 and 3, the upper end portion 27 of the mask body 20 has a convex shape in the center of the width direction X, and a part 27a of the upper end portion 27 is above the first virtual line K1. positioned.

For example, a conventional mask for adults has a rectangular shape in which both side edges extend linearly, and the width dimension of the upper end edge and the width dimension of the lower end edge of the mask body are the same. On the other hand, the width dimension of the lower jaw of the wearer's face is smaller than the width dimension of the cheek. In addition, infants have a lower nose base than adults, and the tip of the mandible is round and the mandible is small. For this reason, when an infant wears a mask that is a smaller version of the conventional mask for adults, the lower end of the mask body protrudes from the lower part of the lower jaw and is between the face and the lower end of the mask body. It was easy for a gap to occur. In addition, since the central part of the mask body cannot cover the space between the back of the nose and the cheeks, a gap is likely to occur between the back of the nose and the cheeks. Further, in the conventional mask, since the position where the mask is fixed to the face is not clear, a gap is likely to occur between the mask body and the face.

Referring to FIGS. 5 and 6, when the wearer wears the mask 10, for example, the upper end portion 27 of the mask body 20 is brought into contact with the nose base 4, and then both ears 3 are contacted with the ear hook portion 40. The free portion 42 is hung, and finally, the lower end portion 28 of the mask body 20 is brought into contact with the lower portion 2 of the lower jaw so that the tip 1 of the lower jaw and the inflection point 35 face each other, and the mask 10 is placed on the wearer's face. To wear. In the wearing state, the upper and lower end portions 27 and 28 of the mask body 20 are bent backward, that is, toward the face by pulling the both side portions 22 backward. The vertical inflection points 34 and 35 function as the starting point of the bending, and a space S in which the nostrils and the mouth 5 are located is defined between the vertical inflection points 34 and 35.

In the mask 10 according to the present invention, as shown in FIG. 3, the first virtual line K1 connecting the center point 61a of the upper fixing portion 61 and the upper end edge 30a of the seal line 30, the upper inflection point 34, and the seal line 30 The first inflection angle θ1 formed by intersecting the second virtual line K2 connecting the upper end edge 30a of the lower fixed portion 62 is the third virtual line K3 connecting the center point 62a of the lower fixing portion 62 and the lower end edge 30b of the seal line 30. It is smaller than the second intersection angle θ2 formed by the intersection of the fourth virtual line K4 connecting the lower inflection point 35 and the lower end edge 30b of the seal line 30 (first requirement).

As a result, the upper inflection point 34 is located in front of the center point 61a of the upper fixing portion 61 and is located at a relatively high position of the seal line 30, and can be applied to the nose of an infant whose nose muscle is shorter than that of an adult. The upper end 27 fits. Further, since the lower inflection point 35 is below the lower fixing portion 62 and is at a relatively low position of the seal line 30, the lower end portion 28 faces the lower jaw of an infant having a round shape so as to expand laterally. Is fitted.

Further, the upper end portion 27 of the mask body 20 has a convex shape in the center of the width direction X, and a part 27a of the upper end portion 27 is located above the first virtual line K1 (second requirement). .. Since the nose root 4 of an infant has a shape that is lower and spreads laterally than that of an adult, when the upper end portion 27 is located below the first virtual line K1, a part of the nose root 4 is external. It may cause a gap between the mask body 20 and the face. In the present embodiment, a part 27a of the upper end portion 27 is located above the first virtual line K1 to cover the entire lateral portion of the nose root 4 and a gap is formed between the mask body 20 and the face. It can be suppressed from being formed. Further, since the upper end portion 27 has a curved shape, there is no possibility of giving irritation even if the nose root 4 is touched.

Further, the second virtual line K2 is longer than the fourth virtual line K4 (third requirement). As a result, in the worn state, the upper end portion 27 is fitted to the entire dorsum of the nose, the lower end portion 28 protrudes sharply below the lower jaw to form a gap, and the mask body 20 becomes vertically long in front view. , Does not give the impression of a longer face than the actual face.

As described above, by satisfying all of these three requirements, the seal line 30 has a space S in front of the mouth 5, a nose root 4 and a cheek lower than an adult, and a tip 1 of the lower jaw. It is possible to provide a mask 10 that fits tightly on the face of an infant having a round shape and a narrow lower jaw. In addition, in order to wear the mask 10 by bringing the lower end portion 28 of the mask body 20 into contact with the lower portion 2 of the lower jaw so that the tip 1 of the lower jaw and the inflection point 35 face each other, the mask 10 is attached to the face. The fixing position becomes clear. By wearing the mask 10 in the correct position, it is difficult to create a gap between the mask body 20 and the face, and it is possible to prevent the mask body 20 from being displaced from the face during wearing. The upper and lower edges of the mask body are tilted in each of the width direction and the top and bottom, and the conventional adult mask that can be folded through the seal line located in the center of the width direction is simply reduced. It is not possible to achieve the above-mentioned actions and effects with a mask made of only mask.

With both sides of the conventional mask, it is difficult to bring them into close contact with the wearer's curved cheeks, and a gap is likely to occur between the mask and the face. In particular, the portion located between the upper and lower fixed portions pressed against the face by the pulling force of the ear hook portion tends to rise from the face. On the other hand, in the mask 10 according to the present invention, since the non-existing area 54 in which the welded portions 38a, 38b, 39a, 39b do not exist is arranged in the portion adjacent to the upper and lower fixing portions 61, 62, the upper and lower fixing portions 61 , 62 has moderate flexibility, but the welded portions 38b, 39a, 39b are arranged adjacent to and surrounding the non-existing region 54, so that the welded portions are located around the non-existing region 54. Since the 38b, 39a, and 39b have appropriate rigidity, it is possible to prevent the both side portions 22 including the concave portion 53 from being lifted from the wearer's face. In particular, the concave portion 53 is concave so as to be hollowed forward, and the central portion of the concave portion 53 is further inward than both ends located at the innermost sides of the upper and lower fixing portions 61 and 62. Because it is located at, it is possible to easily deform the surroundings of the upper and lower fixing portions 61 and 62, prevent the mask body 20 from shifting from the face even when the face is moved with respect to the body, and the welded portion. 38b, 39a, 39b can prevent the side portions 22 from rising from the face. Further, the non-existing area 54 also exists in the portion 55 where the concave portion 53 and the longitudinal seal area 39 are closest to each other, and the non-existing area 54 is continuous in the vertical direction to ensure the above-mentioned action / effect. be able to.

Since the upper end edge 20a and the lower end edge 20b of the mask body 20 do not include sharp corners and are linear or curved, a soft image can be given to the wearer and a third party. In addition, since the vertically convex curved portions 51 and 52 and the concave curved portions 53 on both side portions 22 are both curved, they do not strongly irritate the skin even if they touch the skin.

The upper end edge 20a of the mask body 20 is defined by a central portion 36a extending in each of the width directions X from above the seal line 30 and a pair of both side portions 36b extending in the width direction X from the end portion of the central portion 36a. Since the center of both side portions 36b is curved downward in the width direction X, even if the mask body 20 shifts upward during wearing, the upper end edge 20a of the mask 10 is prevented from hitting the eyes 6. be able to. Therefore, in addition to the actions / effects of paragraphs [00 61 ] to [00 63 ], it fits around the nose of an infant with a low nose root and is between the upper end 27 of the mask body 20 and the face. While preventing the formation of gaps, it is possible to prevent the upper end edge 20a of the mask 10 from hitting the eyes 6 of the face of an infant with a high cheek.

Although not shown, as another embodiment of the mask 10, decorative elements such as floral patterns, characters, characters, symbols and symbols may be arranged at one point on the outer surface of the lower portion of the mask body 20 by printing. good. Such a decorative element can improve the design and also function as an identification element for informing the wearer of the upper and lower sides of the mask 10. In particular, since the mask 10 has a peculiar outer shape different from that of the conventional mask, it is not possible to instantly discriminate between the top and bottom, so it can be said that such a discriminating element functions effectively. Further, from the viewpoint of improving the design, for example, a decorative design imitating a human being may be applied according to the shape of the mask main body 20. Of course, the decorative element is not limited to one point as long as it has the above-mentioned function, and may be arranged on the entire mouth / nose covering portion 21 or the entire mask body 20.

Further, as shown in FIG. 2, when the mask main body 20 is expanded, if the dimension L4 between the center points 61a of the upper fixing portion 61 is larger than the length dimension L3 between the center points 62a of the lower fixing portion 62. The distance between the upper fixing portions 61 at the upper end portion 27 of the mask body 20 is increased to increase the space S, and the mask 10 can be fitted to the face of an infant whose ear 3 is lower than that of an adult. The state in which the mask body 20 is expanded means that when the mask body 20 is placed on a flat object, the portion of the mask body 20 except for the vicinity of the seal line 30 is parallel to the upper surface of the flat object. Refers to the state.

Unless otherwise specified, a known material usually used in this field can be used without limitation in addition to the materials described in the present specification as the member constituting the mask 10. .. In addition, terms such as "first" and "second" used in the present specification are used only for distinguishing similar elements, positions, and the like.

10 Disposable mask 20 Mask body 21 Mouth and nose cover 22 Both sides 23 Outer layer sheet (sheet)
24 First intermediate layer sheet (sheet)
25 Second intermediate layer sheet (sheet)
26 Inner layer sheet (sheet)
27 Upper end 30 Seal line 30a Upper edge 30b Lower edge 34 Upper inflection 35 Lower inflection 36a Central part 36b Both sides 38a First welded part (welded part)
38b 2nd welded part (welded part)
39a Third welded part (welded part)
39b 3rd welded part (welded part)
40 Ear hook part 51 Upper convex curved part (convex part)
52 Downward convex curved part (convex part)
53 Concave part (concave part)
61 Upper fixed part 62 Lower fixed part 61a (Upper fixed part) Center point 62a (Lower fixed part) Center point K1 First virtual line K2 Second virtual line K3 Third virtual line K4 Fourth virtual line L1 Second virtual Length dimension of line K2 Length dimension of 4th virtual line K4 Q line (horizontal center line)
X width direction X
Y Vertical direction θ1 First intersection θ2 Second intersection

Claims (6)

In a disposable mask including a mask body having a vertical direction and a width direction and having a mouth and nose covering portion, and a pair of ear hook portions attached to both sides of the mask body.
The mask body has a horizontal center line that divides the vertical dimension into two equal parts, and can be folded via a seal line located at the center in the width direction.
Both ends of the ear hook portion are fixed to the mask body via an upper fixing portion and a lower fixing portion that are located on the side portion of the mask body and are separated in the vertical direction.
Both side portions of the mask body are located between a pair of convex portions adjacent to the upper fixing portion and the lower fixing portion and projecting toward the rear side, and the pair of convex portions, and are directed toward the front side. Has a recess and a recess
The pair of convex portions and the contours of the concave portions have a curved shape.
The mask body is formed by laminating a plurality of sheets of fibrous nonwoven fabric made of a thermoplastic synthetic resin.
The sheets are joined to each other only by a welded portion located on the seal line and the peripheral edge of the mask body.
A non-existent area in which the welded portion does not exist is arranged in the upper fixed portion and the portion adjacent to the lower fixed portion.
A mask characterized in that the welded portion is arranged in a manner adjacent to and surrounding the non-existent area. The mask according to claim 1, wherein the radius of curvature of the contour of the concave portion is smaller than the radius of curvature of the contour of the pair of convex portions. The welded portions located on both sides of the mouth and nose covering portion in the width direction are arranged in a row in the vertical direction.
The mask according to claim 1 or 2, wherein the central portion of the welded portions arranged in a row in the vertical direction is adjacent to the recess. In the unfolded state of the mask body, the upper end portion of the mask body has a shape that is convex upward at the center in the width direction.
The seal line is curved in a side view in a folded state of the mask body, and has an inflection point located between the upper end edge of the seal line and the lateral center line, and the seal line. It has a lower inflection point located below the center point of the lower fixing portion between the lower end edge and the horizontal center line.
The first intersection angle formed by the intersection of the first virtual line connecting the center point of the upper fixed portion and the upper end edge of the seal line and the second virtual line connecting the upper inflection point and the upper end edge of the seal line. Is formed by intersecting a third virtual line connecting the center point of the lower fixing portion and the lower end edge of the seal line and a fourth virtual line connecting the lower inflection point and the lower end edge of the seal line. It is smaller than the two inflections, and the second virtual line is longer than the fourth virtual line.
The mask according to claim 1, wherein a part of the upper end portion of the mask body is located above the first virtual line. Any of claims 1 to 4 , wherein the upper end edge of the mask body has a central portion that is convex upward in the central portion in the width direction and a bilateral portion that has a shape that is convex downward on both sides of the central portion. The mask described in the song. The mask according to any one of claims 1 to 5 , which is for infants.

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