JP3138154U - mask - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a three-dimensionally naturally and smoothly according to the shape of a nose part or a chin part, to make a surface contact with the nose or chin part uniformly without any gaps, and to completely cover the mouth part. Provided is a mask that can be worn without giving a feeling of pressure.
SOLUTION: A nose cover piece 2 and a chin cover piece 3 are arranged in a superposed state on the back surface of a mask body 1 so that the upper end edge of the nose cover piece 2 is centered on the upper end portion of the mask body 1. The lower end edge of the jaw cover 3 is attached to the lower end of the mask body 1 from the center toward the both ends. Mounted by an arcuate mounting portion 3a that curves upward, the nose cover piece 2 and the chin cover piece 3 are developed obliquely upward and diagonally downward, respectively, with these arcuate mounting portions 2a and 3a as fulcrums. By doing so, a three-dimensional mask covering the entire nose and mouth is formed.
[Selection] Figure 6

Description

  The present invention relates to an improvement in a mask worn in the case of preventing pollen or the like from being sucked out or when catching a cold, or in general work.

  Conventionally, masks of various structures have been devised as this type of mask, and simple masks that are generally used are made of rectangular gauze or non-woven fabric, etc. It is known that a string is attached, but if this mask is worn because it has a flat shape, there is a risk that pollen will enter the gap between the back of the mask and the nose or cheek. is there. In addition, a mask that can be used as a three-dimensional mask corresponding to the rising of the nose by forming a plurality of ridges in the vertical direction on the mask body and expanding the ridges from the back side is also widely known, There is a problem that the back surface is crimped to the nose to give a feeling of pressure or discomfort.

  For this reason, for example, as described in Patent Document 1, an upper structure surface and a lower structure surface are connected to upper and lower ends of the middle structure surface, and the upper half of the back surface of the mask body is used as a mask body. The upper structure surface is folded back onto the upper part, and both side edges thereof are folded back to the upper both side edges of the mask body and fixed by fusion or the like so as to incline outward from the upper end toward the lower end. The nose cover part is formed on the surface, while the lower structure surface is folded on the lower half of the back surface of the mask body, and both side edges are folded back to the lower both side edges of the mask body. A three-dimensional structure mask has been devised in which a chin cover is formed on this upper structure surface by being fixed by fusion or the like so as to incline in the direction, and an ear strap is attached to both side ends of the mask body. .

  When wearing, the upper structure surface (hereinafter referred to as a nose cover portion) and the lower structure surface (hereinafter referred to as a chin cover portion) are expanded by pulling backward, and then the nose cover portion is used. Covered in close contact from the nose to both cheeks, and in close contact from the chin to the lower part of both ears by the chin cover, covering the mouth part of the middle structure (hereinafter referred to as the mask body) Can be in a state.

Utility Model Registration No. 3101352

  However, according to the three-dimensional structure mask configured as described above, both side edges of the nose cover part and both side edges of the chin cover part that are folded back with respect to the upper and lower edges of the mask body are connected to both side edges of the mask body. The upper and lower edges of the rim are connected continuously by fusion or the like, and the connected portions that are folded back are formed in a horizontal straight line, causing the nose cover and chin cover to move backward. When unfolded, both side edges of the mask body, nose cover and chin cover are drawn backwards and the mask body tends to bend backward, but the upper end of the nose cover with respect to the upper and lower edges of the mask body As described above, the connecting portion between the edge and the lower edge of the chin cover portion is formed in the horizontal linear folded portion, so that these nose covering portions using these horizontal linear folded portions as fulcrums. And chin cover across the entire width Bracing force trying to prevent the mask body is curved backward will occur attempting to stand up with the same angle.

  In other words, if the mask body is to be bent backward with the nose cover part and the chin cover part raised in the horizontal direction from the horizontal straight folded part with respect to the vertical surface of the mask body, these noses An action force is generated to compress the cover portion and the chin cover portion into a flat fan shape, and this action force becomes a tension force. Therefore, in order to bend and deform the nose cover portion along the nose ridge shape while absorbing the tension force, and to deform the mask body into an arc shape along the mouth portion, A part must be buckled intensively and the nose cover part and chin cover part should be refracted in the vertical direction with the folded part as a fulcrum. This refraction causes the mask, nose cover part, etc. While collapsing occurs, a part of the face that adheres strongly or hardly adheres to the face, and the exact adhesion to the face is obstructed, and the nose cover, chin cover and face There is a problem that a gap is easily generated between the two.

  The present invention has been made in view of such problems, and the object of the present invention is to provide a three-dimensionally smooth and accurate three-dimensional shape according to the shape of the nose and jaw without causing wrinkles or uneven deformation. It is possible to provide a mask that can be deformed automatically and can be worn without causing a sense of incongruity or pressure by making the nose and chin evenly adhere to a surface contact state without gaps.

  In order to achieve the above object, a mask according to the present invention includes a nose covering piece and a chin portion made of the same material as the mask main body on the back surface of the mask main body made of a filter member such as a nonwoven fabric. The cover piece is placed in an overlapped state, and the upper edge of the nose cover piece is bent in an arc shape downward from the center in the width direction of the MAX body toward the both ends. The lower end edge of the chin covering piece is curved in a circular arc upward from the center in the width direction of the mask body toward both side edges. The free end portions of these nose cover pieces and jaw cover pieces are formed so as to be able to expand rearward with the respective weld portions as fulcrums, and Attach a string attachment to both ends and attach this string attachment Has a structure hanging formed by attaching a string.

  In the mask configured as described above, the device according to claim 2 is configured such that the nose cover piece protrudes downward on both side edges from both ends of the attachment portion where the upper end portion is fused to the mask body. The lower end edge is curved into a gently convex arc shape from the lower end of both side edges toward the center, and is formed as a free end edge along with the both side edges, while the jaw covering piece is attached to the mask body. Both end edges protrude upward from both ends of the attachment part where the lower end part is fused, and the upper end edge is curved in a gently convex arc shape from the upper end of both end edges toward the center in the width direction. It is formed on the free edge along with both side edges, and is further surrounded by the lower half surrounded by both side edges and the lower edge of the nose cover piece, and by both side edges and the upper edge of the jaw cover piece The upper half of the mask is superimposed on the back center of the mask body. .

  Further, the invention according to claim 3 is characterized in that the string attachment tool has a string attachment opening opened inward at the upper and lower portions of the outer edge of the synthetic resin thin plate portion fixed to both end portions of the mask body. In addition, a flat U-shaped string insertion locking piece for elastically clamping the ear strap is formed, and a notch recess is provided in the central portion of the outer edge of the synthetic resin thin plate portion. It has a structure in which an ear strap made of a rubber ring is inserted between the upper and lower string locking pieces of the fixture so that it can be pulled out in the length direction against the elastic clamping force of the string insertion locking piece. Yes.

  According to the mask of the present invention, the nose cover piece and the chin cover piece are arranged on the back surface of the mask body so as to be superposed on each other. In addition, the upper end edge of the nose cover piece is connected to the upper end of the MAX main body by a linear fusion part that is curved in an arc from the center in the width direction of the MAX main body toward the both ends. At the same time, the lower end edge of the jaw covering piece is attached to the lower end of the mask body by a fusion part that is curved upward in a circular arc shape from the center in the width direction of the mask body toward both ends. Therefore, if you try to cause the nose cover and chin cover to expand backward using these arcuate attachments as fulcrums, at the beginning of pulling, first pull them to both ends of the arcuate attachments. Both sides of the mask body due to the raising force Can be automatically bent backwards with the center in the width direction as a fulcrum, and the mask body can be greatly arced backwards by raising the nose cover piece and the chin cover piece in the vertical direction. Can be curved.

  At this time, the nose cover piece and the chin cover piece stand up smoothly in the vertical direction with the arcuate mounting portion as a fulcrum, and the max body is drawn backwards according to the degree of the rise, and these nose cover pieces And the jaw covering piece can be uniformly curved together with the mask body without generating partial tensile force or compressive force, and the entire inner surface of the nose portion or jaw can be formed without wrinkles or uneven deformation. It can be smoothly and accurately deformed three-dimensionally along the shape of the part, making the nose and chin evenly contact the surface without any gaps, giving a sense of incongruity and pressure, and also causing cloudiness of the glasses Can be worn without

  According to the second aspect of the present invention, the nose cover piece is formed by projecting the both side edges downward from the both side ends of the arcuate attachment portion whose upper end portion is fused to the mask body. The lower edge is curved into a gently convex arc shape from the lower edge of the both side edges toward the center, and is formed as a free edge along with the both side edges. The lower half portion of the nose covering piece protruding downward from the straight line connecting the two sides forms a flap-shaped free end that can be freely curved and deformed along the face shape, and the entire inner surface of the nose from the nose to the cheek From the tip of the nose by the central portion of the nose cover piece continuously provided at the central portion of the arcuate mounting portion and the central portion of the mask body below the central portion. By forming a bulge that bulges forward The nostril and the mouth part below the nostril are positioned in the recessed space on the back surface of the bulging portion and are covered with a predetermined gap from the back surface without being compressed by the back surface of the mask body. Can breathe smoothly.

  Similarly, the chin covering piece also protrudes upward from both side edges of the attachment part, which has its lower end fused to the mask body, and the upper edge extends from the upper edge of both side edges in the width direction. The nose protrudes upward from a straight line connecting the both ends of the mounting portion curved in an arc shape because it is curved into a gently convex arc shape toward the center of the lens and is formed as a free end edge along with both side edges. The upper half of the part covering piece forms a flap-like free end that can be freely curved and deformed along the shape of the jaw, and the entire inner surface thereof can be brought into close contact with the jaw evenly in a surface contact state. .

  According to the third aspect of the invention, the ear strap attachments attached to the both end portions of the mask main body are arranged vertically at the outer edges of the synthetic resin thin plate portions fixed to the both end portions of the mask main body. A flat U-shaped string insertion locking piece that elastically clamps the ear hook string, and has an outer side of the synthetic resin thin plate portion. A notch recess is provided at the center of the rim, and the length of the hook-and-loop strap made of a rubber ring is inserted between the upper and lower strap locking pieces of the strap fitting and against the elastic pinching force of the strap insertion locking piece. Since it is attached so that it can be pulled out in the direction, it is easy to attach and detach the ear strap to and from the strap attachment through the strap opening that opens to the inside, and it is a synthetic resin that is firmly attached to both ends of the mask body. Appearance while holding the mask body in tension throughout the thin plate It is capable of allowing a good wear.

  Further, since the notch recess is provided in the central portion of the outer edge of the synthetic resin thin plate portion in this string fitting, the finger portion of the string portion exposed between the upper and lower string insertion locking pieces is inserted into the notch recess. The length of the ear strap that is pulled out in the form of a loop outwardly from the upper and lower cord insertion locking pieces by pulling the cord against the elastic clamping force of the upper and lower cord insertion locking pieces The length can be adjusted to the optimal length according to the wearer of the mask, and even if the ear strap is hooked on the ear in this state, the tensile force generated in the ear strap is applied to the string insertion locking piece. Accordingly, it is possible to prevent the string from being pulled out from the string insertion locking piece by acting in a right angle direction, and it is possible to always make stable wearing possible.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view seen from the back side of the entire mask, FIG. 2 is a front view thereof, and FIG. This mask includes a mask main body 1 made of a flexible filter member such as a non-woven fabric that can be heat-sealed, a nose cover 2 and a chin cover 3 made of the same material as the mask main body 1, and a mask main body. 1 is composed of a string attachment 4 attached to both end portions of the 1 and an ear strap 5 attached to the string attachment 4, and the mask body 1 has a vertical width dimension at a central portion in the horizontal width direction. The upper edge of the face is formed so as to have a vertical width substantially equal to the length between the lower end of the nostril opening and the lower end of the chin, and the vertical width gradually decreases from the center toward the both side edges. Gently incline toward the bottom and bottom edge toward the top Gradient edge 1a, are formed in 1b.

  The nose portion covering piece 2 is formed so that both the vertical width and the horizontal width are narrower than the vertical width and the horizontal width of the mask main body 1, and the upper end edge of the nose portion covering piece 2 is the upper end of the mask main body 1. It is attached by a linear fusion part curved in an arc shape downward toward the part, and this arcuate attachment part 2a is caused to move backward as a fulcrum so that it can be expanded and further expanded obliquely upward. Yes.

  The arcuate mounting portion 2a formed by fusing the upper end edge of the nose covering piece 2 is integrally fused to the same portion as the upper end edge of the mask main body 1 at the center in the width direction of the mask main body 1. However, as it goes from the central part to both side edges of the mask body 1, it is gradually separated downward from the inclined upper edge 1a, 1a on both sides of the mask body 1 and further downward from the central part than the inclined upper edge 1a of the mask body 1. Further, the side end portions 2b, 2b having a predetermined length of the nose portion covering piece 2 are directed downward from the both end portions of the arcuate mounting portion 2a without being fused to the mask body 1. The lower end edge of the nose portion covering piece 2 is formed as a free end edge 2c that is curved in a gentle convex arc shape from the lower end corners of the two side ends 2b, 2b toward the center. Accordingly, the lower half portion of the nose covering piece 2 projecting downward from a straight line connecting both side ends of the arcuate mounting portion 2a is formed as a laterally long free end portion 2 '. 'Is disposed on the back center of the mask body 1 in a superposed state.

  On the other hand, the jaw covering piece 3 has the same size and the same shape as the nose covering piece 2 and is formed in an inverted shape of the nose covering piece 2, and its lower end edge is the lower end of the mask body 1. It is attached by a linear fusion part curved in an arc shape upward from the center part in the width direction toward both side ends, and can be expanded by causing the arcuate attachment part 3a to be used as a fulcrum, and further expanding. It is configured to be able to expand obliquely downward.

  The arcuate mounting portion 3a of the jaw covering piece 3 is integrally fused to the same portion as the lower end edge of the mask body 1 at the central portion in the width direction of the mask body 1, but from this center portion. As it goes to both side edges of the mask body 1, it gradually moves away from the inclined lower edge 1 b, 1 b on both sides of the mask body 1, and the degree of bending upward from the center is larger than the inclined lower edge 1 b of this mask body 1. Further, both side end portions 3b, 3b having a fixed length of the jaw portion covering piece 3 are projected upward from both end portions of the arcuate mounting portion 3a without being fused to the mask body 1, and the jaw The upper end edge of the part covering piece 3 is formed as a free end edge 3c that is curved in a gentle convex arc shape from the upper end corners of the side end parts 2b, 2b toward the center part. Accordingly, the upper half portion of the jaw covering piece 3 protruding upward from the straight line connecting both side ends of the arcuate mounting portion 3a is formed as a horizontally-flaped free end portion 3 'in the same manner as the nose covering piece 2. The free end 3 ′ is disposed on the center of the back surface of the mask body 1 together with the nose cover 2 in a superposed state.

  Note that the upper and lower edges of the mask body 1 and the free edges 2c and 3c of the nose cover 2 and jaw cover 3 are horizontal straight lines without being inclined or arcuate from the center toward both ends. You may form in the shape. Further, on the central part of the mask body 1, the free end 3 ′ of the chin cover 3 is placed on the lower side, and the free end 2 of the nasal cover 2 is placed on the free end 3 ′ of the chin cover 3. However, the free end 2 'of the nose cover 2 may be arranged on the lower side.

  As shown in FIG. 4, the string attachment 4 attached to both side ends of the mask main body 1 is made of a vertically long rectangular synthetic resin having a length substantially equal to the vertical width of both side edges of the mask main body 1. A flat U-shaped string insertion locking piece 4b, 4b, which is bent in the shape of a hook toward the inside in the vertical direction at the outer edge of the thin plate portion 4a, is integrally provided and the string insertion locking that is vertically opposed to each other A semicircular cutout recess 4c having a size that allows insertion of a fingertip is formed at the center of the outer end of the synthetic resin thin plate portion 4a between the pieces 4b and 4b, and the back surface of the synthetic resin thin plate portion 4a. Is fixed to the front surface of both end portions of the mask body 1 by fusion bonding.

  The string insertion locking piece 4b provided integrally on the outer edge of the synthetic resin thin plate portion 4a is bent in a semicircular shape from the outer end surface of the synthetic resin thin plate portion 4a toward the inside from the front. A string insertion hole portion 4b1 communicating in the vertical direction for elastically sandwiching the ear hook string 5 by a bent inner surface is provided, and the inner end of the string insertion hole portion 4b1 is further protruded inwardly. A string attachment port 4d is formed between the opposing surfaces of 4b2 and the synthetic resin thin plate portion 4a. The string attaching port 4d has its tip portion refracted forward from the front surface of the synthetic resin thin plate portion 4a to expand the ear hook string 5 so that it can be easily received.

  The string insertion locking piece 4b formed in this way is provided in two places, at the upper part of the synthetic resin thin plate part 4a, at the upper end thereof and a portion having a small gap downward from the upper end. In the lower part of the resin thin plate portion 4a, it is provided at two places, a lower end thereof and a portion having a small gap upward from the lower end, and the upper pair of string insertion locking pieces 4b, 4b and the lower pair of lower portions. The semicircular cutout recess 4c is provided in the central portion of the outer end of the synthetic resin thin plate portion 4a between the string insertion locking pieces 4b and 4b.

  The ear strap 5 is formed of a rubber ring, and is inserted into the string insertion holes 4b1 and 4b1 from the string attachment ports 4d and 4b of the upper and lower string insertion locking pieces 4b and 4b in the string attachment 4 to insert these strings. It is elastically clamped in a state where it is inserted through the hole 4b1 in the vertical direction, and is attached in a state in which the loop-like portion 5a is drawn outward from the string insertion holes 4b1, 4b1 at the upper and lower ends.

  Accordingly, the central portion 5b of the ear strap 5 inserted and supported between the upper and lower strap insertion locking pieces 4b and 4b is arranged in a state of being vertically cut on the semicircular cutout recess 4c. As shown in FIGS. 5 (a) to 5 (c), when the center portion 5b is hooked with a fingertip and the desired length is pulled out from the string insertion locking pieces 4b and 4b against the elastic pinching force of the string insertion hole 4b1. The length of the loop-shaped portion 5a projecting outward is shortened according to the length of the drawer, and the length can be adjusted so as to be in an optimum wearing state according to the wearer. .

  The above-mentioned string portion 5b 'drawn outward from the string insertion locking pieces 4b, 4b facing the upper and lower sides, with the string insertion holes 4b1, 4b1 facing the central part side of the synthetic resin thin plate portion 4a, The portions drawn from the string insertion locking pieces 4b, 4b provided at the upper and lower ends of the thin plate portion 4a are arranged in the length direction of the string, that is, the string insertion holes of the string insertion locking pieces 4b, 4b. By pulling in the extending direction of 4b1, it is possible to return to the string insertion hole 4b1 of the string insertion locking pieces 4b, 4b again to increase the length of the loop-shaped part 5a. In the state of being hooked on the ear, the string inserted through the string insertion hole 4b1 of the string insertion locking pieces 4b and 4b provided at the upper and lower ends of the synthetic resin thin plate part 4a by the tensile force of the loop-shaped part 5a Therefore, the string is prevented from being pulled out from the string insertion hole 4b1.

  Next, when wearing this mask, the center portion of the free end 2 'of the nose cover 2 is picked up and the nose cover 2 is moved backward with its upper end arcuate mounting portion 2a as a fulcrum. When opened, the arcuate mounting portion 2a is curved in a circular arc shape downward from the central portion toward the both side ends with respect to the upper end portion of the mask body 1, so that the free end portion 2 'is first raised. The pulling force acts on both side ends of the arcuate mounting portion 2a in which the upper ends of the both side end portions 2b and 2b are integrally attached, and the both end portions of the mask body 1 are centered in the width direction. It is automatically bent backwards.

  Further, when the free end 2 'of the nose cover 2 is raised rearward and then expanded upward, the center of the nose cover 2 is moved upward with the center of the arcuate mounting portion 2a as a fulcrum. While standing up, the both sides of the nose covering piece 2 are drawn, and by this drawing, the mask main body 1 is further greatly curved backward through the both sides of the arcuate mounting portion 2a. At this time, the nose cover piece 2 can be narrowed at the rear end of the mask body 1 and the distance between both side ends thereof can be narrowed, but the upper end portion of the mask body 1 and the upper end edge portion of the nose cover piece 2 are connected to each other. As described above, the arcuate mounting portion 2a is curved downward from the central portion toward both side ends as described above, so that the nose portion covering piece 2 is inclined backward through the arcuate mounting portion 2a. As shown in FIG. 6, it can stand up so as to escape upward, and can stand up in a state in which it is fully tensed without wrinkles or irregularities.

  In this way, the nose cover piece 2 rises obliquely upward toward the rear, and curves with the mask body 1 from the center toward the both sides to form a three-dimensional mask. 7 and 8, when the garment is worn, the central curved portion of the nose portion covering piece 2 covers the bulge so that the back of the curved portion is in close contact with both sides from the nose ridgeline. The central curved portion of the mask main body 1 in a state of being formed downward and hanging downward from the central portion of the arcuate mounting portion 2a connected to the lower end of the bulging portion is located at a position at a small distance forward from the mouth portion. The mouth is covered and the inner surface of both side ends of the mask body 1 and the inner surface of both sides of the free end 2 'of the nose cover 2 are not compressed and pressed against the cheek surface. It will adhere evenly over the entire surface.

  Similarly to the nose cover piece 2, the jaw cover piece 3 can be expanded by causing the lower end arcuate mounting part 3 a to be used as a fulcrum and expanding the rear end of the free end 3 ′. When both side end portions of the main body 1 are bent backward with the central portion in the width direction as a fulcrum, and further raised downward, the central portion of the jaw covering piece 3 becomes an arcuate mounting portion. The nose part covering piece 2 is drawn up while standing downward with the central part of 3a as a fulcrum, and by this drawing, the mask body 1 is further curved backwards through both sides of the arcuate mounting part 3a. The jaw covering piece 3 can be developed in a state where the jaw covering piece 3 is fully tensioned without causing wrinkles or irregularities on the jaw covering piece 3.

  As described above, the nose cover 2 and the chin cover 3 are deployed rearward, so that the nasal cover 2 and the chin cover 3 together with the mask body 1 are shown in FIGS. As shown in FIG. 2, the three-dimensional mask is formed by curving backward from the central portion toward both sides, and when the mask is worn, the nose portion is entirely covered with the nose portion covering piece 2 as described above. In addition, the jaw covering piece 3 is deformed along the curved shape of the jaw, and the inner surface thereof can be uniformly adhered to the jaw portion without gaps and without pressing.

The perspective view which looked at the whole mask from the back side. The front view. The center longitudinal cross-sectional view. The perspective view of the one end part of the mask with which the string attachment tool was mounted | worn. The front view of the mask one end part in the state which is adjusting the length of an ear hook string. The perspective view which expanded the mask in three dimensions and was seen from the back side of the state. The perspective view of the state which wore. The side view which represents the state with the virtual line.

Explanation of symbols

1 Mask body 2 Nose cover
2a Arc-shaped mounting part 3 Jaw cover
3a Arc mounting part 4 String attachment
4a Thin section made of synthetic resin
4b String insertion locking piece
4c Notch recess

Claims (3)

  A nose cover and a chin cover made of the same material as the mask body are placed on the back of the mask body made of a non-woven fabric filter member, and the upper edge of the nose cover is It is attached to the upper end of the main body by a linear fused portion that is curved downward in a circular arc shape from the center in the width direction of the MAX main body toward both ends, and masks the lower end edge of the jaw covering piece It is attached to the lower end of the main body by a fusion part that is curved upward in a circular arc shape from the center in the width direction of the mask main body toward both side ends, and these nose cover pieces and jaw cover pieces are free. The end part is formed so that it can be expanded rearward with the respective fusion part as a fulcrum, and further, a string attachment is attached to both side ends of the mask body, and an ear strap is attached to this string attachment A mask characterized by that.   The nose cover piece protrudes downward from both side edges of the mounting part where the upper end of the mask is fused to the mask body, and the lower edge extends from the lower edge of both side edges toward the center. The jaw covering pieces are curved from a gentle convex arc shape along with the both side edges, while the jaw covering pieces are formed on both sides of the attachment part where the lower end is fused to the mask body. The end edge protrudes upward and the upper end edge is curved in a gently convex arc shape from the upper end of both end edges toward the center in the width direction, and is formed as a free end edge along with both end edges, The lower half surrounded by the both side edges and the lower edge of the nose cover piece and the upper half surrounded by the both edges and the upper edge of the jaw cover piece are placed on the back center of the mask body. The mask according to claim 1, wherein the masks overlap each other.   The string attachment tool has a string attachment opening opened inward at the upper and lower parts of the outer edge of the synthetic resin thin plate part fixed to both side ends of the mask body, and elastically sandwiches the ear hook string And a notch recess is provided in the central portion of the outer edge of the synthetic resin thin plate portion, and a rubber is provided between the upper and lower string locking pieces of the string mounting tool. 2. The mask according to claim 1, wherein an ear strap made of a ring is attached so that it can be pulled out in the length direction in an inserted state and against the elastic clamping force of the string insertion locking piece.

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