JP7401893B2 - 3D mask - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Disclosed at a business meeting at Hakujuji Co., Ltd. headquarters on July 17, 2020

The present invention relates to a three-dimensional mask.

In recent years, masks such as sanitary masks have been frequently used from the viewpoint of protection from pollen, viruses, etc. and hygiene. For example, Patent Document 1 proposes a mask that is made of nonwoven fabric, has pleats on the top and bottom, and fits a rounded facial shape. Further, Patent Document 2 discloses a three-dimensional mask in which the respective ends of a right sheet and a left sheet are joined. This three-dimensional mask forms a three-dimensional shape by expanding the right sheet and the left sheet, and is configured so that there is no gap between the peripheral edge of the mask and the skin.

Utility model registration No. 3156690 Japanese Patent Application Publication No. 2006-43227

In recent years, masks have been required to be endowed with a variety of functions. For example, masks are required to have high-performance pollen intrusion prevention functions, virus intrusion prevention functions, PM2.5 intrusion prevention functions, and the like.

In addition, masks are required to fit well to the face. One of the reasons is that the wearer feels comfortable. Another reason is to exhibit good filter performance. This is because if the mask does not fit well on the face, when the mask is worn, a lot of air that does not pass through the mask will flow from around the mask and reach the nose and mouth, making it difficult to obtain the filtering effect of the mask. Therefore, the mask needs to have the function of ``reducing the inflow of air from around the mask as much as possible'', that is, the function of realizing a state in which ``the majority of the inhaled air is filtered air that has passed through the mask''.

Conventionally, in order to enhance the above-mentioned functions, household masks have been provided with pleats on a flat mask surface to broadly cover the nostrils and mouth, and masks that cover the nostrils and mouth three-dimensionally. Three-dimensional masks and the like are known that have a structure that minimizes the gap between the face and the mask. A three-dimensional mask, for example, as in the three-dimensional mask disclosed in Patent Document 2, consists of two planar, left-right symmetrical sheets joined at their respective ends, and from the unjoined part of the two sheets. Some are constructed so that they can be expanded to form a three-dimensional structure.

This type of three-dimensional mask is not manufactured to fit each individual's facial shape, so it may not necessarily fit sufficiently tightly to the face of each wearer. However, if you try to improve the fit by, for example, increasing the tension on the ear hooks and forcefully pressing the mask against your face, the comfortable fit is likely to be compromised. This is because some parts of the face are pressed strongly, causing discomfort.

The present invention has been made in view of the above circumstances, and an exemplary problem is to provide a three-dimensional mask that can improve adhesion to the face and prevent loss of comfortable fit. do.

In order to solve the above problems, a three-dimensional mask as an exemplary aspect of the present invention has the following configuration.

(1) A three-dimensional mask consists of a sheet-shaped right mask body having an upper right edge, a lower right edge, and a curved right front edge, and a sheet-shaped left mask body having an upper left edge, a lower left edge, and a curved left front edge. A mask main body, wherein most of the right front edge and the left front edge are joined, and the upper right end of the right front edge and the upper left end of the left front edge are joined. The right mask main body has an upper end unjoined part that is not joined, and a lower end unjoined part in which a lower right end of the right front edge and a lower left end of the left front edge are not joined, and the right mask main body has The right mask body includes a plurality of laminated sheets, and the right mask body has a plurality of right joining parts formed in a line for joining the plurality of sheets, and the left mask body has a plurality of laminated sheets. The left mask body includes a plurality of left joining portions formed in a line for joining the plurality of sheets.

Further objects or other features of the present invention will become apparent from the preferred embodiments described below with reference to the accompanying drawings.

According to the three-dimensional mask according to the present invention, it is possible to improve the adhesion to the face and to suppress deterioration of a comfortable fit.

FIG. 2 is a perspective view of the three-dimensional mask according to Embodiment 1 of the present invention when it is unfolded for wearing. (a) is a side view of the three-dimensional mask shown in FIG. 1 seen from the right mask body side in a folded state, and (b) is a side view seen from the left mask body side. FIG. 2 is a detailed view of the right mask body of the three-dimensional mask shown in FIG. 1; FIG. 2 is an enlarged view of the vicinity of the upper end of the three-dimensional mask shown in FIG. 1; FIG. 2 is an enlarged view of the vicinity of the lower end of the three-dimensional mask shown in FIG. 1; FIG. 3 is a side view of the three-dimensional mask according to Embodiment 2 of the present invention when viewed from the right mask main body side in a folded state.

[Embodiment 1]
EMBODIMENT OF THE INVENTION Hereinafter, the three-dimensional mask 1 based on Embodiment 1 of this invention is demonstrated using drawings. In addition, the up-down direction and the left-right direction in the following description are the directions in the state in which the three-dimensional mask 1 is viewed from the front when worn, or simply the directions on the drawings, and are appropriately illustrated in the drawings. Further, when the three-dimensional mask 1 is worn on the face, the side that bulges out forward may be called the front side, and the opposite side may be called the inner side.

As shown in FIG. 1, the three-dimensional mask 1 includes a mask body 3 that three-dimensionally covers the nostrils and mouth, and ear straps 5 for attaching the mask body 3 to the face. The mask body 3 has a predetermined filter function. The ear straps 5 have a function of maintaining the close contact of the mask body 3 to the face when the mask body 3 is worn on the face. Therefore, the ear strap 5 is configured to exhibit elasticity using a material such as rubber or a structure.

The mask body 3 includes a right mask body 3a and a left mask body 3b. The right mask main body 3a and the left mask main body 3b are joined to each other at the front edge 7, as will be described later. A right ear strap 5a is connected to the right mask body 3a, and a left ear strap 5b is connected to the left mask body 3b. The mask body 3 is worn on the wearer's face by hanging the right ear strap 5a and the left ear strap 5b over the wearer's ears.

As shown in FIGS. 2(a) and 2(b), the right mask main body 3a and the left mask main body 3b have a bilaterally symmetrical shape, and each is formed into a planar shape, that is, a sheet shape. As shown in FIG. 2(a), the right mask main body 3a has a right front edge 7a, a right upper edge 8a, a right lower edge 9a, and two right ear strap connection parts 11a and 12a.

The right front edge portion 7a corresponds to a portion extending vertically from the center when the three-dimensional mask 1 is viewed from the front. Specifically, the right front edge portion 7a is a portion that extends from the bridge of the wearer's nose, passes through the tip of the nose, and reaches the lower jaw, and bulges out in front of the face when the wearer wears the wearer. Therefore, the right front edge 7a is curved convexly forward along a profile that covers the bridge of the nose to the lower jaw when the face is viewed from the side.

The upper right edge portion 8a is a portion that continues from the upper end 15a of the right front edge portion 7a to the right ear strap connection portion 11a. The upper right edge 8a extends from the bridge of the wearer's nose, passes through the upper part of the cheek, and reaches in front of the ear, and comes into close contact with the upper part of the cheek when the wearer wears the wearer. In the first embodiment, the right upper edge 8a has a shape that is inclined slightly downward from the upper end 15a of the right front edge 7a and extends upward again in the direction of the right ear strap connection part 11a. It's not limited to shape.

The lower right edge portion 9a is a portion that continues from the lower end 16a of the right front edge portion 7a to the right ear strap connection portion 12a. The lower right edge portion 9a extends from the lower jaw of the wearer through the lower part of the cheek to the front of the ear, and when worn, comes into close contact with the lower part of the cheek from the chin. In the first embodiment, the right lower edge portion 9a has a shape that is inclined upward from the lower end 16a of the right front edge portion 7a and extends in the direction of the right ear strap connection portion 12a, but is not limited to this shape. do not have.

The right ear strap connection parts 11a and 12a are parts to which both ends of the right ear strap 5a are connected, respectively. The right ear strap connecting portion 11a is located above the right ear strap connecting portion 12a.

The left mask main body 3b shown in FIG. 2(b) has a left front edge 7b, a left upper edge 8b, a left lower edge 9b, and two left ear strap connection parts 11b and 12b. The left mask main body 3b is symmetrical with the right mask main body 3a, and its shape is the same as that of the right mask main body 3a, so "b" is added instead of "a" in the description. Omitted.

In the first embodiment, when there is no need to distinguish between the right front edge 7a and the left front edge 7b, they are collectively referred to as the front edge 7. Similarly, when there is no need to distinguish between the upper right edge 8a and the upper left edge 8b, they are collectively referred to as the upper edge 8. Further, when there is no need to distinguish between the lower right edge 9a and the lower left edge 9b, they are collectively referred to as the lower edge 9. Similarly, for other parts, if left and right are to be distinguished, "right" or "left" is added, and if left and right are not to be distinguished, "right" and "left" are not indicated.

In the first embodiment, the mask body 3 includes a sheet of nonwoven fabric or gauze made of thermoplastic resin. Specifically, the mask body 3 includes a plurality of sheets stacked in four layers each having a filter function. These four-layer sheets have the function of suppressing the passage of pollen, viruses, and/or dust. The four-layer sheet may be provided with different functions. For example, each layer of the sheet may have different fiber conditions so that each layer has a different particle size that is easier to capture, and each layer may be given a pollen-capturing function, a dust-capturing function, a catalytic function, etc. good. Note that the material, number of layers, and functions of the sheet constituting the mask body 3 are not limited to the above examples.

Returning to FIG. 1, in the three-dimensional mask 1, the right mask main body 3a and the left mask main body 3b are joined at most of the front edge 7. On the other hand, the left and right sides of the upper edge 8, lower edge 9, ear strap connection parts 11 and 12, and surface portion of the mask main body 3 are not joined. Further, the front edge portion 7 has an unjoined portion 19 at the upper end portion 17 and the lower end portion 18 . Details of the joined portion and unjoined portion 19 between the right mask main body 3a and the left mask main body 3b will be described later.

When wearing the three-dimensional mask 1, when holding the ear straps 5a and 5b and opening them to the left and right, as shown in FIG. 1, a space is formed inside with the front edge 7 bulging forward. The three-dimensional mask 1 is placed so that the nostrils and mouth are accommodated in this space, and the ear straps 5a and 5b are hung over the ears, thereby completing the wearing of the three-dimensional mask 1.

Next, the detailed configuration of the mask body 3 will be explained using FIG. 3. Note that since the left mask body 3b is symmetrical to the right mask body 3a, only the right mask body 3a is illustrated in FIG. 3, and illustration of the left mask body 3b is omitted.

As shown in FIG. 3, the mask body 3 has a front edge joint where the right mask body 3a and the left mask body 3b are joined by welding at the front edge 7 where the right front edge 7a and the left front edge 7b overlap. It has 14. Further, as shown in FIG. 4, the mask main body 3 has an upper end unjoined portion 191 in which the upper right end 17a of the right front edge 7a and the upper left end 17b of the left front edge 7b are not joined. Further, as shown in FIG. 5, the mask main body 3 has a lower end unjoined portion 192 in which the lower right end 18a of the right front edge 7a and the lower left end 18b of the left front edge 7b are not joined. The upper end unjoined part 191 and the lower end unjoined part 192 are collectively referred to as an unjoined part 19.

In other words, as shown in FIG. 3, the leading edge joint 14 extends from a position 151 spaced downwardly from the upper end 15 of the leading edge 7 to a position 161 spaced upwardly from the lower end 16 of the leading edge 7. is formed. The upper end unjoined portion 191 is formed between the upper end 15 of the front edge portion 7 and a spaced apart position 151 spaced downward. Further, the lower end unjoined portion 192 is formed between the lower end 16 of the front edge 7 and the spaced apart position 161 spaced upward.

The length of the upper end unjoined portion 191, that is, the distance from the upper end 15 of the front edge 7 to the separated position 151, is preferably 5 mm or more and 18 mm or less, more preferably 10 mm or more and 18 mm or less, More preferably, the length is 12 mm or more and 15 mm or less. Further, the length of the lower end unjoined portion 192, that is, the distance from the lower end 16 of the front edge 7 to the separated position 161, is preferably 5 mm or more and 20 mm or less, more preferably 10 mm or more and 18 mm or less. It is preferably 12 mm or more and 15 mm or less.

The effects of the unjoined portion 19 are as follows. When the front edge 7 is joined from the upper end 15 to the lower end 16, it is difficult for the right mask main body 3a and the left mask main body 3b to open laterally at the upper end 17, so that the upper end 17 touches the bridge of the wearer's nose when worn. It may get caught and cause discomfort such as pain to the wearer. Further, when worn, the upper end portion 17 does not come into close contact with the bridge of the wearer's nose, which tends to leave a gap.

Similarly, when the front edge 7 is joined from the upper end 15 to the lower end 16, it is difficult for the right mask main body 3a and the left mask main body 3b to open laterally at the lower end 18, so that the lower end 18 is connected to the wearer's chin. It may become embedded and cause discomfort such as pain to the wearer. Further, when worn, the lower end portion 18 does not come into close contact with the wearer's chin, which tends to leave a gap.

On the other hand, by providing the upper end portion 191 at the upper end portion 17 of the front edge portion 7, the upper right end portion 17a and the upper left end portion 17b are aligned along the bridge of the wearer's nose, as shown in FIG. It opens to the left and right, making it easier to adhere to the bridge of the nose, increasing adhesion. Furthermore, the open upper end 17 acts as a cushion against the bridge of the wearer's nose. Therefore, the possibility of causing discomfort to the wearer is suppressed.

Further, by providing the lower end unjoined portion 192 at the lower end 18 of the front edge 7, the lower right end 18a and the lower left end 18b are opened left and right along the lower jaw of the wearer, as shown in FIG. This makes it easier to adhere to the lower jaw, improving adhesion. Furthermore, the open lower end 18 acts as a cushion against the wearer's chin. Therefore, the possibility of causing discomfort to the wearer is suppressed.

Next, the right joint portion 22 will be explained. As mentioned above, the mask body 3 includes four laminated sheets. It is necessary to prevent these multiple sheets from shifting. Therefore, the mask main body 3 has a linear joint portion 22 for joining a plurality of sheets. In the three-dimensional mask 1 according to the first embodiment, the joint portion 22 also has the role of increasing the adhesion of the mask body 3 to the face. As shown in FIG. 3, the right joint part 22 includes a first right joint part 23 for bringing the lower part of the cheek into close contact, a second right joint part 24 for bringing the upper part of the cheek into contact, and a part for bringing the side part of the nose into contact. and a third right joint portion 25.

The first right joint portion 23 is formed to be curved in a direction opposite to the curve direction of the front edge portion 7 from the upper right edge portion 8a to the lower right edge portion 9a. That is, in FIG. 3, the front edge portion 7 is curved convexly to the left, and the first right joint portion 23 is curved convexly to the right. The first right joint portion 23 is curved like a part of an oval shape. The oval shape in the first embodiment means a curved shape similar to an ellipse, and does not mean a strict ellipse shape.

In the first embodiment, the first right joint section 23 is composed of three first right joint sections 231, 232, and 233. The distance between adjacent first joints 23 becomes wider toward the lower edge 9a. In other words, the distance between the first right joint portion 231 and the first right joint portion 232 becomes wider toward the lower edge 9a, and the distance between the first right joint portion 232 and the first right joint portion 233 increases toward the lower edge 9a. It becomes wider toward the portion 9a. Further, the first right joint portion 23 is formed such that the angle of inclination of the first right joint portion 23 with respect to the lower edge portion 9a gradually decreases as the first right joint portion 23 approaches the lower edge portion 9a.

Note that the first right joint part 233 is not interrupted in the middle, but the first right joint part 231 and the first right joint part 232 are the right ear strap connection part joints that join the right ear strap connection parts 11a and 12a. Because of the portion 26a, it is divided into an upper part and a lower part. In this way, the first right joint portion 23 may be formed continuously, or may be formed with interruptions in the middle.

Although the number of first right joint portions 23 is not limited, it is preferable that there is a plurality of them. Moreover, when there are multiple pieces, it is preferable that the interval between the adjacent first right joint parts 23 becomes wider as it approaches the lower edge part 9a as described above.

By providing the first right joint part 23, the right mask main body 3a can easily bend along the first right joint part 23. Therefore, by configuring the plurality of first right joint parts 23 such that the interval between adjacent first right joint parts 23 becomes wider as it approaches the lower edge part 9, the right mask main body 3a can be extended from the chin to the cheek. It becomes easier to bend according to the shape of the face. Therefore, the contact area between the right mask main body 3a and the chin to the cheek increases, improving adhesion. At the same time, the pressing force of the right mask main body 3a from the chin to the cheek is dispersed, thereby achieving the effect of suppressing discomfort.

The second right joint portion 24 is formed in a linear shape below the upper right edge 8a of the right mask main body 3a along the line of the upper right edge 8a. In the first embodiment, the second right joint section 24 is composed of three second right joint sections 241, 242, and 243. The distance between adjacent second right joint portions 24 becomes wider as the front edge portion 7 is approached.

Although the number of second right joint portions 24 is not limited, it is preferable that there is a plurality of second right joint portions 24. Moreover, in the case of a plurality of pieces, it is preferable that the distance between the adjacent second right joint parts 24 becomes wider as it approaches the front edge part 7 as described above.

By configuring the interval between adjacent second right joint parts 24 to become wider as they approach the front edge part 7, the right mask main body can be 3a becomes easier to bend along the facial shape of the upper part of the cheek, the contact area between the right mask main body 3a and the upper part of the cheek increases, and the adhesion is improved. At the same time, the pressing force of the right mask main body 3a against the upper part of the cheek is dispersed, and an effect of suppressing discomfort can also be obtained.

A plurality of the third right joint parts 25 are formed in a linear shape so as to intersect with the second right joint part 24 from the vicinity of the upper right edge 8a of the right mask main body 3a. In the first embodiment, the third right joint portion 25 is composed of two third right joint portions 251 and 252. The third right joint portion 25 is formed from the upper right edge 8 a to a position beyond the second right joint portion 24 . The third right joint part 25 is located at a position away from the right front edge 7a of the right mask main body 3a so that the third right joint part 25 is located near the nose side of the wearer when the three-dimensional mask 1 is worn. It is located. Although the number of third right joint portions 25 is not limited, it is preferable that there is a plurality of third right joint portions 25.

By configuring the third right joint part 25 as described above, the right mask main body 3a can easily bend along the facial shape of the nose side part for the same reason as the reason for the effect described in the first right joint part 23. Therefore, it is expected that the contact area between the mask body 3 and the nose side portion will increase, and the adhesion will improve. At the same time, the pressing force of the right mask main body 3a on the nose side part is dispersed, which can be expected to suppress discomfort.

The right mask main body 3a may include any one or two of the first right joint part 23, the second right joint part 24, and the third right joint part 25. Alternatively, the right mask main body 3a may include all of the first right joint part 23, the second right joint part 24, and the third right joint part 25.

The right joint part 22 described above is a welded part by welding, and more specifically, it is a spot welded part in which a plurality of spots are linearly spaced apart and arranged. The shape of each spot of the spot welding portion is preferably circular, elliptical, rectangular, etc., but may be irregular. Moreover, it is preferable that each spot has a maximum diameter of 0.8 mm or less. The maximum diameter refers to the length of the widest part. Further, the pitch of the spots is preferably about 1 mm. The right joint portion 22 is composed of one or more such spots arranged linearly. By forming the right joint portion 22 in a spot shape, the right mask main body 3a is prevented from becoming hard due to continuous linear joints, and deterioration of the feel when worn is suppressed.

The detailed configuration of the right mask main body 3a has been described above. Note that the left mask main body 3b is configured symmetrically with the right mask main body 3a, and its shape and function are the same as the right mask main body 3a, so a description thereof will be omitted.

According to the three-dimensional mask 1 according to the first embodiment described above, it is possible to improve the adhesion to the face and to suppress the loss of a comfortable fit.

[Embodiment 2]
Next, a three-dimensional mask 2 according to a second embodiment of the present invention will be described with reference to the drawings. Note that the same elements as in Embodiment 1 are given the same numbers, and detailed explanations are omitted. In the second embodiment, when left and right are to be distinguished, "right" or "left" is appended, and when left and right are not to be distinguished, "right" and "left" are not appended.

As shown in FIG. 6, the three-dimensional mask 2 has an upper end 17 and a lower end 18 of the front edge 7 formed into a round shape, that is, a curved shape. Specifically, the upper right end 17a of the right front edge 7a and the upper right edge 8a are connected in a curved shape, and the upper left end 17b and the upper left edge 8b of the left front edge 7b are connected in a curved shape. ing. Further, the lower right end 18a of the right front edge 7a and the lower right edge 9a are connected in a curved manner, and the lower left end 18b of the left front edge 7b and the lower left edge 9b are connected in a curved manner. .

In the three-dimensional mask 2 according to the second embodiment, the upper end 15 and the lower end 16 apparently do not exist. However, as shown by the dotted line in FIG. 6, the intersection of the line extending the front edge 7 upward and the line extending the upper edge 8 forward corresponds to the upper end 15, and The intersection of the extended line and the line extending forward from the lower edge 9 corresponds to the lower end 16. Although only the right mask main body 3a is shown in FIG. 6, the left mask main body 3b is also bilaterally symmetrical and has the same configuration.

The three-dimensional mask 2 according to the second embodiment provides the same effects as the three-dimensional mask 1 according to the first embodiment. Furthermore, by forming the upper end portion 17 in a curved shape, the contact between the upper end portion 17 and the bridge of the wearer's nose becomes more flexible, and the fit can be improved. Further, by forming the lower end portion 18 in a curved shape, the contact between the lower end portion 18 and the lower jaw of the wearer becomes more flexible, and the fit can be improved.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications and changes can be made within the scope of the gist. For example, the material of the right mask main body 3a and the left mask main body 3b is not limited to thermoplastic resin nonwoven fabric or gauze, but may be other fibrous materials, or porous materials (for example, urethane resin, etc.) etc. may be used.

In the embodiment described above, the leading edge joint portion 14 and the joint portion 22 are joined by welding. Welding is a method of joining by locally heating the thermoplastic resin using heat or ultrasonic waves, etc. to melt the thermoplastic resin, and then cooling and solidifying the resin. However, the joining method is not limited to welding. Depending on the material of the mask body 3, bonding with adhesive or sewing, etc. can be used as appropriate.

Note that the present invention includes the following gist.

[Purpose 1]
The three-dimensional mask includes a sheet-shaped right mask body having an upper right edge, a lower right edge, and a curved right front edge;
A sheet-shaped left mask body having an upper left edge, a lower left edge, and a curved left front edge,
Most of the right front edge and the left front edge are joined,
an upper end unjoined portion where the upper right end of the right front edge and the upper left end of the left front edge are not joined;
a lower end unjoined portion where the lower right end of the right front edge and the lower left end of the left front edge are not joined;
The right mask main body includes a plurality of laminated sheets, and the right mask main body has a plurality of linearly arranged right joining parts formed for joining the plurality of sheets,
The left mask body includes a plurality of laminated sheets, and the left mask body has a plurality of linearly arranged left joining parts formed to join the plurality of sheets. .
According to the above-mentioned three-dimensional mask, it is possible to improve the adhesion to the face and to suppress the loss of a comfortable fit.

[Purpose 2]
The right joint part includes a first right joint part that extends from the upper right edge to the lower right edge and is curved in the opposite direction to the front right edge, and the left joint part extends from the upper left edge to the lower left edge. The present invention is intended to include a first left joint portion extending toward the edge and curved in a direction opposite to the left front edge portion.

[Purpose 3]
The object of the present invention is that a plurality of the first right joint portion and the first left joint portion are each formed.

[Purpose 4]
In the plurality of first right joint parts, the distance between the adjacent first right joint parts becomes wider as it goes toward the lower right edge, and the distance between the plurality of first left joint parts becomes wider as it goes toward the lower left edge. The purpose is to increase the distance between adjacent first left joint portions.

[Purpose 5]
The right joint portion includes a plurality of second right joint portions formed along the upper right edge, and the distance between the adjacent second right joint portions increases toward the right front edge, and the distance between the adjacent second right joint portions increases toward the right front edge. The joint portion includes a plurality of second left joint portions formed along the upper left edge, and the distance between adjacent second left joint portions increases toward the left front edge. .

[Purpose 6]
The right joint part has a plurality of third right joint parts formed in a direction from near the upper right edge to intersect the second right joint part at a position away from the right front edge, and the left joint part The third left joint portion may include a plurality of third left joint portions formed in a direction from near the upper left edge to intersect the second left joint portion at a position away from the front left edge.

[Purpose 7]
The plurality of sheets of the right mask main body and the plurality of sheets of the left mask main body each include a thermoplastic resin nonwoven fabric or gauze, and the right joint portion and the left joint portion each include a plurality of spots. are spot welds arranged in a line.

[Purpose 8]
The spot is intended to have a maximum diameter of 0.8 mm or less.

[Purpose 9]
The upper right end of the right front edge and the upper right edge are connected in a curved manner, the upper left end of the left front edge and the upper left edge are connected in a curved manner, and the upper right edge of the right front edge is connected in a curved manner. The lower right end portion of the edge portion and the lower right edge portion are connected in a curved shape, and the lower left end portion of the left front edge portion and the lower left edge portion are connected in a curved shape. do.

1, 2: Three-dimensional mask, 3: Mask body, 3a: Right mask body, 3b: Left mask body, 5: Ear strap, 5a: Right ear strap, 5b: Left ear strap, 7: Front edge, 7a: right front edge, 7b: left front edge, 8: upper edge, 8a: right upper edge, 8b: left upper edge, 9: lower edge, 9a: right lower edge, 9b: left lower edge, 11a , 12a: Right ear strap connection part, 11b, 12b: Left ear strap connection part, 14: Front edge joint part, 15: Upper end, 15a: Upper end of right front edge, 15b: Upper end of left front edge, 151: 16: Lower end, 16a: Lower right front edge, 16b: Lower left front edge, 161: Separated position from lower end, 17: Upper end, 17a: Upper right edge, 17b: Upper left edge. , 18: lower end, 18a: lower right end, 18b: lower left end, 19: unjoined part, 191: upper end unjoined part, 192: lower end unjoined part, 22: right joined part, 23 (231, 232, 233): 1st right joint part, 24 (241, 242, 243): 2nd right joint part, 25 (251, 252): 3rd right joint part, 26a: Right ear strap connection part joint part

Claims (8)

a sheet-shaped right mask body having an upper right edge, a lower right edge, and a curved right front edge;
A sheet-shaped left mask body having an upper left edge, a lower left edge, and a curved left front edge,
Most of the right front edge and the left front edge are joined,
an upper end unjoined portion where the upper right end of the right front edge and the upper left end of the left front edge are not joined;
a lower end unjoined portion where a lower right end of the right front edge and a lower left end of the left front edge are not joined;
The right mask main body includes a plurality of laminated sheets, and the right mask main body has a plurality of linearly arranged right joining parts formed for joining the plurality of sheets,
The left mask main body includes a plurality of laminated sheets, and the left mask main body has a plurality of linearly arranged left joining parts formed for joining the plurality of sheets,
The right joint portion includes a plurality of second right joint portions formed along the upper right edge, and the distance between the adjacent second right joint portions increases toward the right front edge, and the distance between the adjacent second right joint portions increases toward the right front edge. The three-dimensional mask includes a joint portion including a plurality of second left joint portions formed along the upper left edge, and a distance between adjacent second left joint portions increasing toward the left front edge. The right joint part has a plurality of third right joint parts formed in a direction from near the upper right edge to intersect the second right joint part at a position away from the right front edge, and the left joint part The three-dimensional solid according to claim 1 , wherein the part has a plurality of third left joints formed in a direction from near the upper left edge to intersect with the second left joint at a position away from the front left edge. mask. The right joint part includes a first right joint part that extends from the upper right edge to the lower right edge and is curved in the opposite direction to the front right edge, and the left joint part extends from the upper left edge to the lower left edge. The three-dimensional mask according to claim 1 or 2 , further comprising a first left joint portion curved in a direction opposite to the left front edge portion toward the edge. The three-dimensional mask according to claim 3, wherein a plurality of said first right joint parts and a plurality of said first left joint parts are each formed. In the plurality of first right joint parts, the distance between the adjacent first right joint parts becomes wider as it goes toward the lower right edge, and the distance between the plurality of first left joint parts becomes wider as it goes toward the lower left edge. The three-dimensional mask according to claim 4 , wherein the distance between adjacent first left joint portions is wide. The plurality of sheets of the right mask main body and the plurality of sheets of the left mask main body each include a thermoplastic resin nonwoven fabric or gauze, and the right joint portion and the left joint portion each include a plurality of spots. The three-dimensional mask according to any one of claims 1 to 5 , wherein the three-dimensional mask is a linearly arranged spot welding part. The three-dimensional mask according to claim 6 , wherein the spot has a maximum diameter of 0.8 mm or less. The upper right end of the right front edge and the upper right edge are connected in a curved manner, the upper left end of the left front edge and the upper left edge are connected in a curved manner, and the upper right edge of the right front edge is connected in a curved manner. 1 . The lower right end of the edge and the lower right edge are connected in a curved manner, and the lower left end of the left front edge and the lower left edge are connected in a curved manner. 8. The three-dimensional mask according to claim 7 .

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