JP3233183U - mask - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mask for preventing invasion of viruses, bacteria, fine particles, etc. into the body, which can be worn while eating, drinking or singing. SOLUTION: A mask main body 110 of a non-woven fabric mask 100 is provided with knob portions 150R and 150L at both left and right ends of a main body lower portion 110B. The wearer pulls the knobs 150R and 150L left and right to fold them upside down from the normal mask wearing state (covering the mouth and nose), and overlaps the lower part 110B of the main body with the upper part 110A of the main body to open the mouth. Can be exposed. When the knobs 150R and 150L are pulled to the left and right during the folding operation, the mask body 110 is pulled away from the surface of the face, and the wearer's makeup can be prevented from collapsing. The folding area 110Z is between the first fold portion 161 of the mask main body 110 and the second fold portion 162 immediately below, and the mask main body 110 is folded in two at the center (center line 115) of the folding area 110Z between them. .. [Selection diagram] Fig. 1

Description

The present invention relates to a mask that prevents droplet infection of viruses, bacteria, etc. and invasion of fine particles into the body.

In recent years, masks with a high filter function have been provided to prevent various viruses that cause infectious diseases such as the new coronavirus (COVID-19), various bacteria, PM2.5, and fine particles of pollen from entering the body. In particular, when viral infections are widespread, it becomes necessary to wear high-performance masks on a daily basis.
Among commonly used masks, non-woven masks are more effective than other cloth masks and urethane masks in that they cover the mouth and nose with their material (nonwoven fabric) and unique shape using folds. It is expected to be highly effective in preventing droplets containing bacteria and fine particles from entering the body.

Patent Document 1 describes a plurality of folds including a mask body formed of a sheet made of a fibrous non-woven fabric, a pair of ear hooks extending from both side edges of the mask body in an annular shape, and an overlapping portion in which the sheets are folded over in the mask body. Disposable masks with (pleats) are disclosed.

Japanese Unexamined Patent Publication No. 2008-55035

By the way, when a virus infection occurs, it is high so that droplets containing the virus of another person (infected person) do not invade the body, or when oneself is infected, the droplets containing the virus are not spread from oneself. It is necessary to wear a performance mask (for example, a non-woven mask), but in a scene where you enjoy a dinner with another person or a scene where you enjoy karaoke with a large number of people, you need to remove the mask every time you eat, drink, or sing.

Here, it is known that the act of removing the mask, eating and drinking with others, and singing in front of others spreads a large amount of droplets containing viruses and bacteria.
If you want to enjoy dinner with others, you have to keep a sufficient distance from each other and take measures such as separating each other with an acrylic plate. Even in this case, wear a mask when you finish eating and drinking. It is necessary to repeatedly put on and take off the mask during the dinner.
Also, when enjoying karaoke with others, it is necessary to repeatedly put on and take off the mask, such as removing the mask when singing and putting on the mask as soon as the singing is finished.

Also, when putting on and taking off the mask, it is necessary to store the mask in a clean state so that viruses and bacteria do not adhere to the removed mask, but in reality, the removed mask is randomly placed on the desk. If you put it in your pocket, the mask itself becomes unsanitary.

Further, when a virus or a bacterium is attached to the mask, the virus or the bacterium may be attached to the desk or clothes, and there may be a problem that the infection by the virus or the bacterium spreads by putting on and taking off the mask.
Further, frequent putting on and taking off of the mask has a problem that the mask and the skin are rubbed each time the mask is put on and taken off, and the make-up is liable to come off.

Therefore, the inventor of the present application needs to prevent viruses, bacteria, and PM2.5 from entering the body when the mask is normally worn (covering the mouth and nose), and expose the mouth for eating, drinking, and singing. If there is, you can immediately expose your mouth and cover your mouth and nose when you finish eating, drinking or singing without feeling stress, and the mask may have viruses or bacteria attached to it. An object of the present invention is to provide a mask in which there is no risk of viruses, bacteria, etc. adhering to the mask adhering to the mask storage location.

The first invention of the present application has a mask having a horizontally long rectangular mask body and a pair of ear straps attached to both left and right ends of the mask body, and the mask body is stretched from above to below. It consists of an upper part of the main body to which the upper end of the ear strap is attached, a lower part of the main body to which the lower end of the ear cord is attached, and an intermediate part of the main body provided between the upper part and the lower part to cover the mouth and nose, and a pair of knobs. The portions are provided at the left and right left and right ends of the lower part of the main body, respectively.
Further, in the second invention of the present application, the pair of ear straps attached to the left and right side ends of the mask body are formed with their shafts intersecting the upper ends of the pair of knobs and the side ends of the mask body. It is attached so as to be diagonal to the corner (for example, at an angle of 45 degrees).

Further, the third device of the present application is formed so that the upper side of the mask body is inclined downward from the center of the mask body to the left and right side ends, and the lower side is inclined upward from the center of the mask body to the left and right side ends. It was done.
Further, in the fourth invention of the present application, the mask main body is made of a non-woven fabric sheet, and the first fold portion on which two or more folds are formed is provided on the upper side of the main body in the middle portion of the main body, and two or more folds are provided. The second fold portion formed with the above is provided on the lower side of the main body in the middle portion of the main body, and the film thickness of the non-woven fabric is the first between the first fold portion and the second fold portion. It forms an elongated folding region that is thinner than the folds and the second folds.
Further, the fifth device of the present application is to form a notch at a position overlapping the horizontally long folding region at both left and right ends of the mask body.

According to the first and second ideas, the mask is pulled from the normal wearing state (the state of covering the mouth and nose) to the left and right of the knobs provided on the left and right of the lower end of the mask body, and in this state. By pulling it upward as it is, the lower part of the main body is easily overlapped with the upper part of the main body, and the mouth can be exposed.
At this time, the mask main body is stably held in a state of being folded in two at a position above the mouth of the wearer's face, and the nose can be continuously covered by the middle portion of the main body.
For this reason, when it becomes necessary to expose the mouth, such as when eating or drinking or singing at karaoke, from the normal wearing state where the mask covers both the mouth and nose, keep the mask on and only the mouth as appropriate. You can expose it to eat, drink and sing, and when you finish eating, drinking and singing, you can quickly return to the normal usage state.

In addition, when folding the mask in two, the mask body can be pulled forward from the surface of the face simply by pulling the knob sideways and pulling it upward. It also becomes less likely to occur.
Further, according to the third device, the shape of the main body of the mask is inclined so as to decrease from the center toward the left and right side ends, and at the lower end, the shape is inclined so as to increase toward the left and right side ends. Therefore, the mask does not obstruct the view of the wearer regardless of whether the mask is normally worn or the lower part is overlapped with the upper part to expose the mouth.

Further, according to the fourth device, in the elongated folding region between the first fold portion and the second fold portion, the other portion (first fold portion, second portion) is provided as much as the fold is not provided. Because it is thinner than the folds), when folding the mask body up and down, the mask body is easily and quickly along the folding area (along the center line of the middle part of the body), and the lower part is on the upper part. It is layered neatly, does not lose its shape, and looks good.

Further, according to the fifth device, notches are formed at the left and right side ends of the middle portion of the main body, so that the mask main body can be moved up and down 2 more easily and more quickly in combination with the action of the elongated folding region. Can be folded in one.
In addition, when the mask is folded, the upper and lower attachment parts of the ear straps overlap, so the ear straps form a stable circle from the cheeks to the ears, and the folded state is stable, and the mask shifts when eating or drinking or singing. It becomes difficult.

It is a front view which shows the outer surface of the nonwoven fabric mask 100 which concerns on 1st Embodiment of this invention. It is a front view of the non-woven fabric mask 100 which shows the layout of the seal area (131-134) provided in the outer peripheral part of a mask main body 110. It is a figure which shows the dimension of the attachment part (141-144) of the non-woven fabric mask 100, the 1st and 2nd folds part, and each part. It is a figure which shows the 1st and 2nd folds of a non-woven fabric mask 100 from the inner surface. It is an enlarged view which shows the attachment part 144 of the lower right of the non-woven fabric mask 100. It is explanatory drawing which shows the normal wearing state of the non-woven fabric mask 100. It is explanatory drawing which showed the operation procedure which spreads the knobs 150R, 150L of a mask main body 110 to the left and right from the normal wearing state which covers a mouth and a nose with a non-woven cloth mask 100. It is explanatory drawing which shows the operation procedure until the knobs 150R and 150L of a non-woven fabric mask 100 are pulled up and folded in half, and the mouth is exposed. Explanatory drawing showing the operation procedure from the normal wearing state of covering the mouth and nose with the non-woven mask 100 to folding the mask main body 110 in half using the knobs 150R and 150L to expose the mouth from the side of the face. Is. It is a front view which shows the outer shape and the dimension of each part of the nonwoven fabric mask 200 which concerns on 2nd Embodiment of this invention. The operation procedure from the normal wearing state of covering the mouth and nose with the non-woven mask 200 to the folding of the mask body 110 in two using the knobs 150R and 150L to expose the mouth is shown from the front and side of the face. It is explanatory drawing.

(First Embodiment)
Hereinafter, the non-woven fabric mask 100 according to the first embodiment of the present application will be described with reference to FIGS. 1 to 5.
As shown in FIG. 1, the non-woven fabric mask 100 includes a horizontally long rectangular mask body 110 and a pair of left and right ear straps 120 (120R, 120L) attached to the right side of the mask body 110.

Of these, the mask main body 110 is divided into a main body upper part 110A, a main body lower part 110B, and a main body intermediate part 110C between the main body upper part 110A and the main body lower part 110B, paying attention to each function.
The pair of ear straps 120 (120R, 120L) attached to the left and right ends of the mask body 110 are made of an elastic and stretchable material, facilitating the operation of folding the mask body 110 in two. As the material, known materials such as non-woven fabric, woven fabric, plastic film, and elastic cord can be appropriately used.

The non-woven fabric sheet forming the mask body 110 includes an inner layer sheet (not shown) that comes into contact with the skin, an outer layer sheet (not shown) that does not come into contact with the skin, and a virus or the like provided between the inner layer sheet and the outer layer sheet. It has a multi-layer structure including a filter sheet (not shown) that captures fine particles and prevents them from entering the body.
As shown in FIG. 2, the outer periphery of the mask main body 110 is provided with an upper seal area 131, a lower seal area 132, a right seal area 133, and a left seal area 134.
In these four sealing regions 131, 132, 133, and 134, a multilayer (here, three layers) non-woven fabric is welded by a plurality of linear welding lines (indicated by a thick broken line in the figure) extending along the outer periphery. The inner layer sheet, filter sheet, and outer layer sheet are joined.
Three linear welding lines are formed in the upper part 110A of the main body, and reinforcement that can be bent according to the shape of the nose during use between the uppermost linear welding line and the linear welding line immediately below it. The member 111 is arranged.

By forming the welding bonding line only on the outer peripheral portion of the mask main body 110, the three layers of the non-woven fabric are not welded in the central region surrounded by the welding bonding line. At this time, flexibility and breathability in the central region of the main body intermediate portion 11C are maintained.
Here, the inner layer sheet and the outer layer sheet can be formed from various known fiber non-woven fabrics such as melt blown fiber non-woven fabric, spunbond fiber non-woven fabric, SMS fiber non-woven fabric and air-through fiber non-woven fabric. Further, it is preferable to use a fibrous non-woven fabric having a good touch as the inner layer sheet and a fibrous non-woven fabric having a strong sheet strength as the outer layer sheet.

As shown in FIGS. 3 and 4, the main body intermediate portion 110C constituting the center of the mask main body 110 has a plurality of folds folded in the vertical direction (a total of eight folds in the examples of FIGS. 3 and 4). Is formed, the first fold portion 161 is formed on the upper side of the central line (center line 115) of the main body intermediate portion 110C, and the second fold portion 162 is formed on the lower side of the central line 115.
The elongated region extending in the lateral direction (along the center line 11) sandwiched between the first fold portion 161 and the second fold portion 162 becomes the folding region 110Z.
In this folding region 110Z, since the non-woven fabric sheet is not folded, the film thickness is extremely thin as compared with the first fold portion 161 and the second fold portion 162.

The upper part 110A of the main body, the middle part 110C of the main body, and the lower part 110B of the main body of the mask main body 110 are welded in the right side seal area 133 and the left side seal area 134 at all the left and right side ends.
As described above, in the main body intermediate portion 110C, the first fold portion 161 and the second fold portion 162 are welded only at the left and right side ends of the mask main body 110, so that the folds do not spread at the left and right side ends. It is possible for the folds to spread only in the center.

As shown in FIGS. 1 to 3, the lower portion 110B of the main body 110 of the mask main body 110 is provided with knob portions 150 (150L, 150R) at both left and right ends. The knob portions 150R and 150L are welded to the mask main body 110 at the lowermost end of the seal area 133 on the right side and the lowermost end of the seal area 134 on the left side (FIG. 3).
Further, as shown in FIG. 3, a pair of the uppermost end (mounting portion 141) of the seal region 133 on the right side of the upper portion 110A of the main body 110 of the mask main body 110 and the uppermost end (mounting portion 143) of the seal region 134 on the left side are paired. The upper end 121 (121R, 121L) of the ear strap 120 (120R, 120L) is welded.
At the lowermost end (mounting portion 142) of the seal area 133 on the right side of the mask body 110 and the lowermost end (mounting portion 144) of the seal area 134 on the left side, the lower end 122 (attachment portion 142) of the pair of ear straps 120 (120R, 120L) 122R, 122L) is welded on the knob 150 (150R, 150L) (FIGS. 2 and 3).

Here, in the mounting portion 142 and the mounting portion 144, the lower ends 122R and 122L of the ear straps 120R and 120L are shaped so that the axis of the ear straps 120 is formed by the side ends of the mask body 110 and the upper ends of the knob portions 150L and 150R. It is diagonally (see FIG. 5) superimposed on the right-angled portion to be formed.
As a result, when the lower side of the mask body 110 of the non-woven fabric mask 100 is bent upward and folded in two, the ear straps 120 (120R, 120L) do not interfere with the fingers picking the knobs 150R, 150L. Moreover, the welding strength that can sufficiently withstand the stretching of the knob portions 150R and 150L is maintained (because they are overlapped diagonally). Therefore, the operation of stretching the knob portions 150R and 150L with sufficient force and pulling them upward to fold the mask body 110 in two becomes easy, and the mounting strength in the vicinity of the knob portions 150R and 150L is also improved.

As described above, the intermediate portion 110C of the mask main body 110 is provided with a plurality of folds. By providing the folds, the non-woven fabric mask 100 has a horizontally long rectangle as shown in FIG. 1 before use. When worn, the folds are appropriately stretched in the center of the middle part 110C of the mask body 110 according to the shape of the user's face to provide a comfortable fit and to prevent viruses, bacteria, fine particles, etc. from the non-woven mask 100. An excellent invasion prevention effect into the body is achieved.
Here, in the main body intermediate portion 110C of the mask main body 110, a folding region 110Z that divides the mask main body 110 into upper and lower halves is formed in the center thereof, so that the mask main body 110 is folded vertically in two around the folding region 110Z. ..

The folding region 110Z is a region in which no folds are formed between the upper first fold portion 161 and the lower second fold portion 162 of the main body intermediate portion 110C as described above.
Therefore, folding along the folding area 110Z facilitates the operation.
Further, the mask main body 110 is formed with a pair of notches 112 (112R, 112L) corresponding to the left and right side ends of the folding region 110Z (see FIG. 1).
The pair of notches 112 (112R, 112L) and the folding area 110Z are combined, and the operation of folding the mask body 110 in two up and down can be easily performed along the center line 115.

In the mounting portions 141, 142, 143, and 144 at the four corners of the mask main body 110, the seal region 131 and the seal region 133, the seal region 131 and the seal region 134 overlap, and the seal region 132, the seal region 133, and the seal region 132 The seal areas 134 overlap.
Therefore, at the four corners of the mask main body 110, not only the welded portions of the sheet are concentrated and the bonding strength is increased, but also the rigidity is increased.
Further, in the first embodiment, as shown in the cross-sectional views of FIGS. 3 and 4, in the first fold portion 161, the outside of the mask main body 110 (from the main body upper side 110A toward the center line 115 (). On the non-skin facing surface side), folds that are convex upward and folds that are convex downward are alternately formed (a total of four folds in the first fold portion 161). On the other hand, in the second fold portion 162, folds that are convex downward and folds that are convex upward are alternately formed on the outside of the mask main body 110 from the lower portion 110B of the main body toward the center line 115 (second). A total of four folds) are also formed in the folds 162 of the above.

3 and 5 show the dimensions of each part of the non-woven fabric mask 100.
The width W of the mask body 110 is 16.5 cm, the height h is 9.0 cm, and the depth d of the notch 112 (112R, 112L) is 1.0 cm (see FIG. 5).
The knob portion 150 (150R, 150L) has a width j of 2.0 cm and a height k of 1.5 cm.
Further, the first fold is set so that the center line 115 in the folding area 110Z is halved (4.5 cm from both the upper end and the lower end) of the height h (9.0 cm) of the mask body 110. The portions 161 and the second fold portions 162 are formed in the intermediate portion 110C of the main body by folding the non-woven fabric.

Next, from the normal wearing state of the non-woven mask 100 (wearing state covering the mouth and nose), the mask body 110 is folded in two by pinching the knobs 150R and 150L with fingers and pulling them upward (mouth). The operation procedure for making the (exposed wearing state) is described with reference to FIGS. 6 to 9.
FIG. 6A is a diagram showing a state in which the non-woven fabric mask 100 is normally worn (normal wearing state) to cover the mouth and nose and prevent viruses, bacteria, and fine particles from entering the body.

In order to fold the mask body 110 from this normal wearing state to expose the mouth, first, the left and right knobs 150 (150R, 150L) are picked with fingers (FIG. 7 (a)). From this state, the knob portions 150R and 150L are pulled in the left-right direction (the direction of the arrow in FIG. 7A) to spread the mask body 110 (FIGS. 7B and 9B).
At this time, since the mask body 110 is separated from the wearer's face surface toward the front (FIG. 9 (b)), when the makeup is applied, the inner surface of the non-woven fabric mask 100 does not rub the makeup portion, and the makeup is applied. Does not cause collapse.

While the knobs 150R and 150L are being pinched by the left and right hands as shown in FIG. 7B, the wrists are turned back as shown in FIGS. 8C and 9C, and the lower part 110B of the mask main body 110 is turned back. Is pushed up while turning over to the upper part 110A side of the main body around the center line 115 in the folding area 110Z (arrow in FIG. 9C), so that the mouth can be easily and quickly exposed.

When the knobs 150R and 150L are pulled up and the mounting portions 141 and 142 of the main body lower 110B are overlapped with the mounting portions 143 and 144 of the main body upper 110A, the main body upper 110A and the main body lower 110B of the mask main body 110 are folded in half. They overlap and become stable (FIGS. 8 (d) and 9 (d)).

At this time, the mask main body 110 is folded in half up and down around the center line 115 to expose the mouth, and the nose remains covered with the middle portion 110C of the main body (wearing state with the mouth exposed).
Further, since the mounting portions 141 and 143 and the mounting portions 142 and 144 are overlapped with each other, the upper and lower ends of the ear strap 120R welded to the mounting portions 141 and 143 are overlapped with each other, as shown in FIG. 9D. By superimposing the upper and lower end portions 121 and 122 of the ear strap 120 on the non-woven fabric mask 100, the mask body 110 is maintained in a stable folded state even when eating or drinking or singing, so that the non-woven fabric mask 100 can eat comfortably. You can enjoy singing.

When the non-woven fabric mask 100 is returned to the normal wearing state (wearing state covering the mouth and nose) after eating, singing, etc., the operation opposite to the operation shown in FIGS. 7 to 9 may be performed. The original effect of preventing the invasion of viruses, bacteria, fine particles, etc. into the body by the non-woven fabric mask 100 can be easily exerted again.

(Second Embodiment)
Next, the second embodiment according to the present application will be described with reference to FIGS. 10 and 11.
The non-woven fabric mask 200 according to the second embodiment is cut into a "hexagonal shape" in which its upper side is inclined downward toward both left and right ends, and its lower side is inclined upward toward both left and right ends. It is a hexagon cut to form a "H" shape.
With such a shape, the shaded portion of FIG. 10 is cut off as compared with the non-woven fabric mask 100 of the first embodiment.

By making the upper side "heavy" and the lower side "reverse" in this way, the mask body 210 can be seen even in the normal wearing state of the non-woven fabric mask 200 (when the mouth and nose are completely covered). Since the mask body 110 is cut diagonally in the left-right direction along the shape of the face from the mask body to the ear, the obstruction of the view by the mask body 110 is minimized.

Further, even when the outer mask main outer 210 of the non-woven fabric mask 200 is folded up and down in two (the wearing state where the mouth is exposed), the lower side of the mask body 210 inverted upward is inverted to form a "H" shape. Since it overlaps with the "heavy" shape on the upper side of the main body, it is possible to minimize the obstruction of the wearer's view by the double-folded mask main body 210 even when eating or drinking or singing.

As shown in FIG. 10, the dimensions of the mask body 210 of the non-woven fabric mask 200 of the second embodiment are such that the width W2 is 18.0 cm and the upper side is downward from the center (center line 117) of the mask body to the left and right both ends. (In FIG. 10, both left and right ends are tilted so as to be lowered by f1 = 1.5 cm) to form a "heavy" shape. Further, the lower side of the mask body 210 is inclined upward from the center of the mask body (center line 117) to the left and right side ends (in FIG. 10, the left and right side ends are inclined so as to be higher by f2 = 1.5 cm). ) It is "reverse V-shaped".

The height h2 of the mask main body 210 is 10.0 cm, and the center line 215 passes through the center thereof. The vertical length h3 from the center line 215 to the left and right left and right ends of the upper and lower sides is 5.0 cm.
Further, the notch 212 (212R, 212L) formed at the end of the folding region 210Z has a depth of cut of 0.5 cm.
Further, the knob portion 250 (250R, 250L) has a height d2 in the vertical direction of 1.0 cm and a width g2 of 1.5 cm.

In the second embodiment, the mask main body 210 has a hexagonal shape in which the upper side is inclined downward from the center of the mask main body and the lower side is inclined upward from the center of the mask main body. If the upper side is inclined downward from the center of the mask body and the lower side is inclined upward from the center of the mask body, other polygonal shapes or the upper side is gentle from the center of the mask body downward. It may be a curve in which the lower side is gently inclined upward from the center of the mask body.

The non-woven fabric mask 200 is different in shape and dimensions from the non-woven fabric mask 100 of the first embodiment and the mask main body 210, but other configurations and other functions are the same. The description is omitted.
In the first embodiment and the second embodiment described above, the non-woven fabric mask has been described as an example, but even if the mask is made of another material, for example, a cloth, the mask is formed on the left and right sides of the lower end of the mask body. By providing the knob portion, it is possible to make a mask that can easily switch the usage mode from the normal wearing state to the wearing state at the time of eating and drinking.

This device can be applied not only to a mask (surgical mask) that prevents viruses, bacteria, and fine particles from entering the body, but also to other masks that cover a human face, such as masks used in theater and sports.

100 Non-woven mask 110 Mask body 110A Main body upper 110B Main body lower 110C Main body middle part 110Z Folding area 115 Center line 120 (120R, 120L) Ear cord 141, 142, 143, 144 Mounting part 150 (150R, 150L) Knob part 200 Non-woven mask 210 Mask body 210Z Folding area 215 Center line 250 (250R, 250L) Knob

Claims (5)

It has a horizontally long rectangular mask body and a pair of ear straps attached to both left and right ends of the mask body.
The mask main body is provided between the upper portion of the main body to which the upper end of the ear strap is attached, the lower portion of the main body to which the lower end of the ear strap is attached, and the upper portion and the lower portion from above to below, and covers the mouth and nose. It consists of the middle part of the main body
A mask characterized in that a pair of knobs are provided on both left and right ends of the lower part of the main body, respectively. The pair of ear straps attached to the left and right ends of the mask body have their axes at 45 degrees with respect to the corner formed by the intersection of the upper ends of the pair of knobs and the side ends of the mask body. The mask according to claim 1, wherein the mask is attached so as to be used. The claim is characterized in that the upper side of the mask body is formed so as to be inclined downward from the center of the mask body to the left and right side ends, and the lower side is formed so as to be inclined upward from the center of the mask body to the left and right side ends. 1 or the mask according to claim 2. The mask body is made of non-woven fabric.
In the middle part of the main body, a first fold portion on which two or more folds are formed is provided on the upper side of the main body, and a second fold portion on which two or more folds are formed is on the lower side of the main body. Provided,
A feature is that an elongated folding region is formed between the first fold and the second fold so that the film thickness of the nonwoven fabric is thinner than that of the first fold and the second fold. The mask according to any one of claims 1 to 3. The non-woven fabric mask according to any one of claims 1 to 4, wherein notches are formed at the left and right side ends of the horizontally long folding region, respectively, at the left and right side ends of the mask body.

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