WO2021006122A1

WO2021006122A1 - Mask

Info

Publication number: WO2021006122A1
Application number: PCT/JP2020/025710
Authority: WO
Inventors: 竹内　広宣
Original assignee: 興研株式会社
Priority date: 2019-07-09
Filing date: 2020-06-30
Publication date: 2021-01-14
Also published as: JP7506416B2; TW202106348A; JPWO2021006122A1

Abstract

[Problem] To provide a mask in which adhesion to the face surface during wearing is increased without an increase in bulkiness when packaged, and which can be easily manufactured. [Solution] A mask 1 comprises: a filter part 2 comprising an air-permeable sheet material, at least one pleat being formed extending in the lateral direction, the pleat widening in the vertical direction during wearing to cover at least the nose and mouth; a face contact body 3 formed in a ring shape from an elastically deformable plate material, a circumferential edge part of the ring shape being joined to the filter part 2, the face contact body 3 contacting the face surface when worn, and an opening 21 being formed in the face contact body 3 at a position corresponding to at least the nose and mouth; and hanging strings 4 hung around either the head or the ears, the hanging strings 4 attaching the filter part and the face contact body to the face surface. The mask 1 is configured so that when the filter part 2 is widened in the vertical direction, the face contact body 3 elastically deforms so as to follow vertically, and the left and right parts of the face contact body 3 elastically deform and fit closely along the shape of the face surface.

Description

mask

The present invention relates to a mask suitable for use in, for example, a dust mask, a medical mask, or the like.

Conventionally, some masks of this type are described in Patent Documents 1 to 3. The mask described in Patent Document 1 is obtained by inserting a plastic shape-retaining tool having a three-dimensional shape along the face between the peripheral portion of the mask main body and the outer peripheral portion of the face contact cloth.

The mask described in Patent Document 2 has an annular face contact pad and a filter portion joined to the outer peripheral edge portion of the face contact pad and bulged in a chevron shape, and folds are formed in the filter portion. By folding the folds, it becomes flat.

The mask described in Patent Document 3 is provided with a mouthpiece sheet on the side of the mask body that comes into contact with the target portion of the face including the nose and mouth.

Utility Model Registration No. 3117121 Japanese Unexamined Patent Publication No. 2006-149739 Japanese Unexamined Patent Publication No. 2008-302144

The mask described in Patent Document 1 described above has a plastic shape-retaining tool having a three-dimensional shape along the face inserted between the peripheral portion of the mask body and the outer peripheral portion of the face-contact cloth. Although the adhesion between the face and the face-contact cloth is improved when worn, there are problems that the unit price is high, the package is bulky, and space is wasted during transportation and storage.

Further, since the mask described in Patent Document 2 becomes flat by folding the folds of the filter portion bulging in a chevron shape, there is a problem that a step of folding the filter portion is required and the cost is high. is there.

Further, the mask described in Patent Document 3 is formed by connecting the upper and lower mouthpiece sheets by the connecting portion, and the upper and lower mouthpiece sheets are partially overlapped with each other. Since the connecting portion is attached to the central portion of the mask main body portion by welding or crimping, there is a problem that the manufacturing is troublesome and the unit price is high.

And although general pleated masks (surgical masks) are inexpensive and have no problem during transportation or storage, they have poor adhesion to the face, and even if a high-performance filter is used, the gap between the face and the mask Since there is a large amount of leakage, there is a problem that it does not function as a mask.

The present invention has been made in view of such a problem, and it is an object of the present invention to provide a mask that is not bulky when packed, has better adhesion to the face when worn, and can be easily manufactured. There is.

Another issue is to provide a mask that can expand the filter unit three-dimensionally and maintain that state.

In order to achieve such a task, the present invention is characterized by a breathable sheet material, formed with at least one fold extending laterally, and the fold extending vertically when worn, at least with the nose. A filter portion that covers the mouth portion and an elastically deformable plate material are formed in an annular shape, and the peripheral edge portion of the annular shape is joined to the filter portion and comes into contact with the face when worn, and at least a position corresponding to the nose portion and the mouth portion. The filter portion is provided with a face-contact body having an opening formed therein, and a hanging string for attaching the filter portion and the face-contact body to the face by hanging around either the head or the ear portion, and the filter portion is vertically provided. When expanded in the direction, the face-contact body is elastically deformed so as to follow up and down, and the left and right sides of the face-contact body are elastically deformed so as to be in close contact with each other along the shape of the face. ..

In one of the preferred embodiments of the present invention, the face-contact body is provided with a hooking portion for hooking at least a part of the face on the annular portion when worn, and the inside of the opening is provided in the vicinity of the hooking portion. The hooking portion is provided on the lower side of the annular portion, and the protruding piece is formed so as to extend into the opening on both sides of the hooking portion. The hooking portion is configured to be hooked on the jaw portion.

In one of the preferred embodiments of the present invention, the projecting pieces are lower projecting pieces formed in pairs on the lower side of the annular portion symmetrically with respect to a center line extending in the vertical direction, and the lower portions thereof. The protruding pieces are formed so as to be narrowly spaced upward.

In one of the preferred embodiments of the present invention, the facial contact body has an upper protruding piece formed in the opening on the upper side of the annular portion in the shape of a tongue piece, and the upper protruding piece is said to be the same when worn. It is configured to be in close contact with at least a part of the nose.

In one of the preferred embodiments of the present invention, the upper protruding pieces are formed in pairs symmetrically with respect to a center line extending in the vertical direction, and these upper protruding pieces are downward along the shape of the nose. It is formed so that the interval becomes wider toward it.

In one of the preferred embodiments of the present invention, the filter portion is formed in a polygonal shape, one end of each of the hanging cords is joined to both upper corner portions thereof, and the other end of each of the hanging cords is the filter portion. It is joined to the side surface at a height of about 1/4 in the vertical direction.

In the mask according to the present invention, when the filter portion is expanded in the vertical direction, the face contact body is elastically deformed so as to follow up and down, and the left and right sides of the face contact body are elastically deformed so as to adhere to each other along the shape of the face. By configuring the above, it is possible to further improve the adhesion to the face when worn. As a result, there is no gap with respect to the face, and it becomes possible to prevent the leakage of dust and the like.

Further, in the mask according to the present invention, at least one fold extending in the lateral direction is formed on the filter portion, and the fold is folded into a flat state at the time of packing. Therefore, the mask is not bulky at the time of packing. Extremely easy to store. Further, since the mask according to the present invention is composed of a filter unit, a face contact body and a hanging string, the number of parts is small, the production is easy, and a mask excellent in economy can be provided.

Further, in the mask according to the present invention, since a hooking portion for hooking at least a part of the face when worn is provided on the lower side of the face-contact body, the lower side of the face-contact body can be reliably and easily hooked. It can be stopped. In addition, when worn, the hooking portion is hooked on the chin and elastically deformed so as to tilt forward of the face, and the filter portion is pushed by the protruding piece and expanded three-dimensionally, so that the filter portion is originally flat. It is possible to maintain the three-dimensionally expanded state for a long time without easily returning to the normal state.

Further, in the mask according to the present invention, since the pair of lower protruding pieces are formed so as to be narrowly spaced upward, the vicinity of the central portion of the filter portion is pushed, so that the vicinity of the central portion is used as the top portion. It is spread out in a mountain shape, and a space can be secured.

Further, in the mask according to the present invention, an upper protruding piece that protrudes like a tongue piece is formed in the opening on the upper side of the facial contact body, and the upper protruding piece adheres to at least a part of the nose when worn. , Adhesion around the nose can be ensured.

Further, in the mask according to the present invention, since the pair of upper protruding pieces are formed so as to widen the space downward along the shape of the nose, the adhesion around the nose is further improved. At the same time, the filter portion can be pushed by the upper protruding piece and expanded three-dimensionally to secure a space portion.

Further, in the mask according to the present invention, one end of each of the hanging strings is joined to both upper corners of the polygon, and the other ends of each are joined to the side sides of the filter portion at a height of about 1/4 in the vertical direction. Therefore, the filter portion can be easily expanded in the vertical direction, and the filter portion hooked on the chin portion is pulled by the hanging string, so that it is possible to prevent the filter portion below the chin portion from being turned over.

It is a back view which shows the mask of 1st Embodiment of this invention. It is a front view which shows the mask of the same embodiment. It is sectional drawing according to III-III of FIG. It is an enlarged sectional view which shows the part A of FIG. It is schematic cross-sectional view which shows the state of the filter part and the face-contact body when the mask of the same embodiment is attached. It is a side view which shows the state which the wearer wears the mask of the same embodiment. It is a back view which shows the mask of the 2nd Embodiment of this invention. It is a back view which shows the mask of the 3rd Embodiment of this invention. It is explanatory drawing which shows the specific example of the mask which concerns on this invention.

Hereinafter, the mask of the first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

(First Embodiment)
As shown in FIGS. 1 and 2, the mask 1 of the present embodiment has a filter portion 2 made of a breathable sheet material, a face contact body 3 that comes into contact with the wearer's face, and the wearer's left and right ears. Each includes a pair of left and right hanging strings 4 to be hooked.

As shown in FIG. 2, the filter portion 2 is formed into a substantially hexagonal shape, and has two upper side portions 5 that are gently inclined in the left-right direction and a linear lower side portion 6 that faces the upper side portions 5. A straight side side portion 7a extending linearly downward from the upper side portion 5 to a height of approximately 1/4 in the vertical direction, and an inclined side portion 7b inclined inward in the left-right direction from these straight side side portions 7a, respectively. Have.

The filter unit 2 includes a central filter 8 formed at the center in the vertical direction as shown in FIG. 2, and an upper filter 9 and a lower filter 10 formed above and below the central filter 8, respectively. As shown in FIG. 3, the upper filter 9 is formed with two upper mountain folds 11 and an upper valley fold 12 extending in the lateral (left and right) direction, while the lower filter 10 is similarly formed. Two lower mountain folds 13 and lower valley folds 14 extending in the lateral (left and right) direction are formed in the vertical direction.

As shown in FIG. 3, the filter portion 2 has a central filter 8 and an upper filter 9 via a two-row upper fold portion 15 extending between the two upper mountain fold portions 11 and the upper valley fold portion 12. They are connected to form two upper folds 9a. Further, the central filter 8 and the lower filter 10 are connected via a two lower folds 16 extending between the two lower mountain folds 13 and the lower valley fold 14, and the two lower folds 10a are connected. Is forming.

As shown in FIG. 4, the filter unit 2 is laminated in, for example, four layers, absorbs water from the outside to the inside, and absorbs water absorption filter 2a for improving the appearance of the appearance, and dust having a large fiber diameter and large dust. The pre-filter 2b for filtering, the main filter 2c for filtering fine dust having a fine fiber diameter, and the water absorption filter 2d for mainly absorbing the moisture of the wearer's exhaled breath are laminated in this order. The filter unit 2 may have a three-layer structure in which the pre-filter 2b having a large fiber diameter is omitted. In the case of this three-layer structure, the water absorption filter 2a has the above-mentioned function and also has a function as a pre-filter for filtering large dust. The material of the filter unit 2 is soft and bendable, can take in the inspiratory air and discharge the exhaled air of the wearer, and functions as a filter unit capable of filtering the inspiratory air and exhaled air. , Not particularly limited.

As shown in FIG. 2, the filter unit 2 is in the vicinity of the upper side portion 5, and includes the nose clip 17 symmetrically with respect to the center line extending in the vertical direction. The nose clip 17 is made of stretched polyethylene, for example, and is bent along the lateral shape of the nose portion so that the filter portion 2 is brought into close contact with the nose portion. The nose clip 17 is approximately the center of the face contact body 3 in the left-right direction, and is a face contact line that connects the upper ends of both side portions of the face contact body 3 (indicated by a two-point chain line) and the top of the upper chevron portion. It is arranged symmetrically in the middle portion with the upper end portion of the body 3 so that the longitudinal direction is along the left-right direction of the mask 1. The nose clip 17 is not limited to the above position as long as it properly performs its function.

As shown in FIG. 1, the face contact body 3 is formed by punching from a flat plate material that can be elastically deformed. As the face contact body 3, a non-woven fabric or pulp is attached to a non-breathable foamed resin material such as a foamed polyethylene sheet or a foamed polyvinyl alcohol sheet. The face contact body 3 includes an annular portion 20 formed in an annular shape. The peripheral edge portion 20a of the annular portion 20 is joined to the peripheral edge portion of the filter portion 2 via a fixing means such as welding or adhesion. That is, in the face contact body 3, only the peripheral edge portion 20a of the annular portion 20 is joined to the peripheral edge portion of the filter portion 2, and the other portions are not joined and are merely overlapped with each other. Can be separated from. Therefore, the face contact body 3 can be easily elastically deformed in the vertical direction and the horizontal direction. In the peripheral edge portion 20a of the face contact body 3, the filter portion 2 in which the upper mountain fold portion 11 and the upper valley fold portion 12 and the lower mountain fold portion 13 and the lower valley fold portion 14 overlap each other is overlapped. It is joined in a state of being joined. The face contact body 3 is in contact with the wearer's face when worn, and an opening 21 is formed at a position corresponding to the nose, mouth, and cheeks around the nose and mouth. As a result, the wearer's nose and mouth can be inserted into the opening 21.

The annular portion 20 of the face contact body 3 is integrally formed with an upper side portion 25, a side side portion 30 continuous from the upper side portion 25 to the left and right, and a lower side portion 22 continuous from these side side portions 30. .. The upper side portion 25 has a predetermined width in the vertical direction thereof. In this case, if the width of the upper side portion 25 of the face contact body 3 is short, the upper side portion 25 is likely to rise when attached, and a gap is likely to be generated from the outside. In the present embodiment, since the width of the upper side portion 25 in the vertical direction has a predetermined length, the contact area with the nose portion is increased, the frictional force is increased, and the mask is less likely to be displaced when worn. it can.

The face contact body 3 is provided with a hook portion 23 on the lower side portion 22 side of the annular portion 20 to hook the jaw portion, which is at least a part of the face when worn. Therefore, in the face contact body 3, the lower side portion 22 side hooks the jaw portion with the hooking portion 23, while the two upper protruding pieces 26 provided on the upper side portion 25, which will be described later, are in close contact with both side surfaces of the nose portion. Since the upper side portion 25 side is hooked, the state in which the filter portion 2 is opened vertically can be hooked on both the chin portion and the nose portion, and the three-dimensional shape can be maintained. In addition, if the nose clip 17 is bent along the lateral shape of the nose as described above so that the filter portion 2 is brought into close contact with the nose, the upper side 25 side is more firmly hooked on the nose. Therefore, the state in which the filter portion 2 is opened vertically can be reliably maintained in both the jaw portion and the nose portion, and the three-dimensional shape can be maintained for a long time.

Lower protruding pieces 24 extending into the opening 21 are formed on both sides of the hooking portion 23, respectively. These lower projecting pieces 24 are formed in pairs symmetrically with respect to the center line extending in the vertical direction of the face contact body 3, and are formed so as to be inclined so that the distance between them becomes narrower upward. Each of the lower projecting pieces 24 has a square tip and is formed so as to project into the opening 21 in the shape of a tongue piece. Each of the lower projecting pieces 24 is formed to have substantially the same width up to the tip, and each tip extends to the central filter 8 formed at the center in the vertical direction of the filter portion 2. That is, the lower protruding piece 24 extends so that the height of the filter portion 2 in the vertical direction is the same. The lower protruding piece 24 is formed so that the side of the tip thereof is in the same direction as the upper fold 9a and the lower fold 10a of the filter portion 2, respectively. A trapezoidal opening 27, which is a part of the opening 21, is formed between the lower protruding pieces 24.

By further expanding the lower side of the trapezoidal opening 27, the length of the hooking portion 23 becomes longer, and the hooking effect on the jaw portion is enhanced. As a result, the face contact body 3 can be reliably hooked on the chin.

In the face contact body 3, upper protruding pieces 26 are formed on the upper side 25 side of the annular portion 20, and these upper protruding pieces 26 are pulled so as to separate the upper side 5 and the lower side 6 at the time of mounting in the vertical direction. When spread out, it is configured to be in close contact with both sides of the nose. The upper protruding piece 26 may be brought into close contact with at least a part of the nose when worn. The upper projecting pieces 26 are formed in pairs symmetrically with respect to the center line extending in the vertical direction, and these upper projecting pieces 26 are gradually spaced downward from each other along the shape of both side surfaces of the nose. It is formed so as to be wide, and an inverted V-shaped opening 28 is formed between them. The trapezoidal opening 27 and the inverted V-shaped opening 28 are formed in a size so that the wearer's mouth and nose can be inserted.

The tip of each of the upper projecting pieces 26 is formed to be square, and is formed so as to project into the opening 21 in the shape of a tongue piece. The tip of each of the upper projecting pieces 26 extends to the central filter 8 in the same manner as the lower projecting piece 24. That is, the upper protruding piece 26 extends so that the height of the filter portion 2 in the vertical direction is the same. Each of the upper projecting pieces 26 is formed so that the width gradually narrows toward the tip. The lower projecting piece 24 and the upper projecting piece 26 extend in a direction approaching each other, and their tips are close to each other.

The face contact body 3 is provided with side side portions 30 formed in an arc shape on both sides of the annular portion 20 as described above. A curved opening 31 having a predetermined curvature is formed inside the side portions 30. The curved portion 31a forming the curved opening 31 is continuously formed on one side of each of the upper protruding piece 26 and the lower protruding piece 24.

The curved portion 31a is formed to have a predetermined curvature in the vertical direction. When the curved portion 31a is pulled so as to separate the upper side portion 5 and the lower side portion 6 and widened in the vertical direction, the curved portion 31a absorbs the tensile force and extends until it becomes substantially linear. Therefore, the larger the curvature of the curved portion 31a in the vertical direction, the longer the distance between the curved portions 31a, and the greater the effect of absorbing the tensile force. As described above, the curved portion 31a has a function of ensuring a tensile width and enhancing adhesion to both cheeks when it becomes substantially linear.

Here, when the curved portion 31a is not formed when it becomes substantially linear, the portion that comes into contact with the cheek portion due to the above-mentioned tensile force is hard because the extension is only the elasticity of the face contact body 3. Therefore, there is a problem that the wearing feeling is significantly impaired. However, when the curved portion 31a is formed as in the present embodiment, even if the curved portion 31a is apparently linear due to the tensile force, there is always room for extension due to the elasticity. A good fit will be obtained.

When the upper protruding piece 26 is pulled so as to separate the upper side portion 5 and the lower side portion 6 and spread in the vertical direction, the upper protruding piece 26 moves upward so that the tips of the upper protruding pieces 26 approach each other and has an inverted V shape. A force that deforms the opening 28 vertically acts. At that time, the central filter 8 of the filter unit 2 is pushed by the respective tips of the upper protruding pieces 26, and the upper folds 9a and the lower folds 10a are three-dimensionally expanded. Since the tips of the upper projecting pieces 26 are spread out at the same height as the central filter 8 of the filter unit 2 in a state of being close to each other, the pressing force is concentrated near the center of the central filter 8. Further, since the force for vertically deforming the inverted V-shaped opening 28 acts, the contact area of the side surface of each upper protruding piece 26 with respect to the side surface of the nose portion becomes wide, and the side surface of the nose portion is strongly pressed against the side surface.

Similarly, when the lower protruding piece 24 is also pulled so as to separate the upper side portion 5 and the lower side portion 6 and spread in the vertical direction, the lower protruding piece 24 also moves downward so that the tips of the lower protruding pieces 24 approach each other. At that time, the central filter 8 of the filter unit 2 is pushed by the respective tips of the lower protruding pieces 24, and the upper folds 9a and the lower folds 10a are three-dimensionally expanded. Since the tips of the lower projecting pieces 24 are spread close to each other at the same height as the central filter 8 of the filter unit 2, the pressing force is concentrated near the center of the central filter 8. Here, the lower projecting piece 24 and the upper projecting piece 26 have predetermined rigidity in order to surely spread the upper folds 9a and the lower folds 10a three-dimensionally and maintain the state.

The pair of left and right hanging strings 4 are flatly formed by elastically stretchable rubber strings. The pair of left and right hanging strings 4 may be formed of a known elastic material such as a non-woven fabric, a woven cloth, or a plastic film. Each end 4a of the pair of left and right hanging strings 4 is joined to the vicinity of the lower end of the upper side portion 5 of the filter portion 2 along the inclination direction of the upper side portion 5 via means such as welding or adhesion. The other ends 4b of the pair of left and right hanging strings 4 are joined via the same means as described above along the inclined direction of the inclined side side portion 7b having a height of about 1/4 in the vertical direction in the filter portion 2, respectively. .. When joining one end 4a and the other end 4b of the pair of left and right hanging strings 4, the outer peripheral edge of the annular portion 20 of the face contact body 3 is joined to the outer peripheral edge of the filter portion 2 at the same time via means such as welding or adhesion. Will be done.

Next, the usage and operation of the mask 1 of the present embodiment will be described.

The mask 1 is in a flat state by folding the upper folds 9a and the lower folds 10a. As a result, the mask 1 is not bulky when packed, so that it is extremely easy to transport and store. Then, in order to wear the mask 1 configured as described above, for example, the face contact body 3 side of the mask 1 is applied to the wearer's face, the nose clip 17 is bent, and the face contact body 3 is raised in the nose. After making it adhere to the portion, a pair of left and right hanging strings 4 are hung around the ear portion. Here, when the nose clip 17 is brought into close contact with the raised portion of the nose portion, the upper protruding piece 26 is brought into close contact with both side surfaces of the nose portion, and the upper portion of the mask 1 is positioned. Here, the nose clip 17 is substantially in the center of the face contact body 3 in the left-right direction, and is the upper end of the face contact body 3 which is the top of the upper chevron portion and the virtual horizontal line connecting the upper ends of both side portions of the face contact body 3. Since it is arranged symmetrically at the position of the intermediate portion with the portion so that the longitudinal direction is along the left-right direction of the mask 1, when the nose clip 17 is bent, the adhesion to the nose portion is improved. The upper protruding piece 26 can surely push out the upper folds 9a and the lower folds 10a in three dimensions.

Next, the wearer pulls the filter portion 2 with his fingertips so as to separate the upper side portion 5 and the lower side portion 6 in the middle portion in the left-right direction, and spreads them in the vertical direction.

Then, as shown in FIGS. 5 and 6, the face contact body 3 is elastically deformed so as to follow up and down, and the curved portions 31a of the left and right side side portions 30 of the face contact body 3 are shown by solid lines in FIG. It extends from the shape until it becomes a substantially straight line indicated by the two-dot chain line that has absorbed the above-mentioned tensile force, and adheres along the shape of both cheeks of the face. At this time, since the inner peripheral side of the face contact body 3 is separated from the filter portion 2, the curved portion 31a can be formed into a substantially straight line without changing the position in the front-rear direction. Here, when the upper side portion 5 and the lower side portion 6 are pulled so as to be separated from each other and spread in the vertical direction, if the curvature of the inner curved portion 31a of the left and right side portion 30 is small, the curved portion 31a immediately becomes linear. The effect of absorbing tensile force is reduced, and the effect of adhesion to both cheeks of the face is reduced. Therefore, if the curved portion 31a becomes straight immediately, the expansion / contraction allowance of the mask 1 disappears when the mouth portion is further opened for conversation or the like. Therefore, for example, when the jaw portion serves as a fulcrum, the mask 1 moves downward. On the other hand, when the nose portion serves as a fulcrum, the mask 1 is displaced upward from the chin portion, and there is a problem that the mask 1 cannot be stably held at a predetermined position on the face.

Therefore, in the present embodiment, the face contact body 3 is made of an elastic body, only the peripheral edge portion 20a of the annular portion 20 is joined, and the curved portions 31a of the left and right side side portions 30 of the face contact body 3 are in the vertical direction. Since it is formed to have a predetermined curvature with respect to the face, it absorbs the above-mentioned tensile force and stretches until it becomes a substantially straight line. The left and right side portions 30 of the above are in close contact with both cheeks, and the state is always maintained. As a result, it is possible to prevent foreign matter such as dust from entering from the outside, and even when the mouth is opened for conversation or the like, the mask 1 does not shift upward and downward, and the mask 1 is placed at a predetermined position on the face. Can be held stably.

Further, when the upper side portion 5 and the lower side portion 6 are pulled so as to be separated from each other and spread in the vertical direction to hook the hook portion 23 of the face contact body 3 to the chin portion, the lower side portion 6 of the face contact body 3 becomes the face. It is elastically deformed so as to tilt forward. Then, the central filter 8 of the filter unit 2 is pushed by the tips of the pair of left and right lower protruding pieces 26, and the upper folds 9a and the lower folds 10a are three-dimensionally expanded. More specifically, as shown by the alternate long and short dash line in FIG. 1, the tips of the lower protruding pieces 24 move downward so as to approach each other. At that time, the central filter 8 of the filter unit 2 is pushed by the respective tips of the lower protruding pieces 24, and the upper folds 9a and the lower folds 10a are three-dimensionally expanded. Since the tips of the lower projecting pieces 24 are spread close to each other at the same height as the central filter 8 of the filter unit 2, the pressing force is concentrated near the center of the central filter 8, and the upper folds 9a and the lower side are spread. The folds 10a can be surely expanded three-dimensionally. Since this state is supported by the lower protruding piece 24, the filter portion 2 does not easily return to the original flat state, and the three-dimensionally expanded state can be maintained for a long time.

At the same time, the central filter 8 of the filter unit 2 is pushed by each tip of the upper protruding piece 24, and the upper folds 9a and the lower folds 10a are three-dimensionally expanded. Specifically, as shown by the alternate long and short dash line in FIG. 1, the tips of the upper protruding pieces 26 move upward so as to approach each other, and a force that deforms the inverted V-shaped opening 28 vertically acts. At that time, the central filter 8 of the filter unit 2 is pushed by the respective tips of the upper protruding pieces 26, and the upper folds 9a and the lower folds 10a are three-dimensionally expanded. Since the tips of the upper projecting pieces 26 are spread close to each other at the same height as the central filter 8 of the filter unit 2, the pressing force is concentrated near the center of the central filter 8, and the upper folds 9a and the lower side are spread. The folds 10a can be surely expanded three-dimensionally. Since this state is supported by the upper protruding piece 26, the filter portion 2 does not easily return to the original flat state, and the three-dimensionally expanded state can be maintained for a long time.

Further, since a force that deforms the inverted V-shaped opening 28 in a vertically long manner acts, the contact area of the side surface of each upper protruding piece 26 with respect to the side surface of the nose portion becomes wide, and the contact area of the side surface of each upper protruding piece 26 becomes strong, and the side surface of the nose portion is strongly pressed against each other. The force is increased and the adhesion around the nose can be further improved. In this way, the wearer's nose, mouth and cheeks are covered with the mask 1.

As described above, in the present embodiment, the nose clip 17 is bent so that the face contact body 3 is brought into close contact with the raised portion of the nose to position the upper portion of the mask 1, and then the filter portion 2 is pulled with a fingertip to move the face contact body 3 up and down. Since the hooking portion 23 of the face-contacting body 3 is elastically deformed to follow the above, the hooking portion 23 of the face-contacting body 3 is hooked on the chin, so that the contraction force of the face-contacting body 3 in the vertical direction acts on the face. The adhesion to the face can be further enhanced.

As described above, according to the present embodiment, when the filter portion 2 is expanded in the vertical direction, the face contact body 3 is elastically deformed so as to follow up and down, and the left and right sides of the face contact body 3 are elastically deformed to form the face. By making it adhere to the face along the line, it is possible to further improve the adhesion to the face when worn. As a result, it is possible to prevent foreign matter such as dust from entering from the left and right directions of the face contact body 3.

Further, in the mask 1 of the present embodiment, the upper folds 9a and the lower folds 10a extending in the lateral direction are formed in the filter portion 2, and the upper folds 9a and the lower folds 10a are folded and flat at the time of packing. Since it is not bulky when packed, it is extremely easy to transport and store. Further, since the mask 1 of the present embodiment is composed of the filter unit 2, the face contact body 3, and the pair of left and right hanging strings 4, the number of parts is small, the manufacturing is easy, and the mask 1 is excellent in economy. Can be provided.

Further, according to the present embodiment, since the hooking portion 23 for hooking the chin portion, which is at least a part of the face when worn, is provided on the lower side portion 22 side of the face-contacting body 2. The lower side 22 side can be reliably and easily hooked.

Further, at the time of wearing, the hook portion 23 is hooked on the chin portion and elastically deformed so as to tilt forward of the face, and the filter portion 2 is pushed by the lower protruding piece 24 and expanded three-dimensionally, and the state is changed. Since it is supported by the lower protruding piece 24, the filter portion 2 does not easily return to the original flat state, and the three-dimensionally expanded state can be maintained for a long time.

Further, according to the present embodiment, since the pair of lower projecting pieces 24 are formed so as to be narrowly spaced upward, the vicinity of the center of the central filter 8 of the filter unit 2 is pushed, so that the center thereof is pushed. It is possible to spread the filter 8 in a chevron shape with the vicinity of the center as the top. As a result, a space can be secured, and it is possible to prevent the wearer from having difficulty breathing.

Further, according to the present embodiment, the pair of lower projecting pieces 24 are formed in the same direction as the upper folds 9a and the lower folds 10a of the filter portion 2, respectively, when the mask 1 is folded. When the portion 2 is expanded in the vertical direction, when the face contact body 3 is elastically deformed, the edges of the tips of the lower protruding pieces 24 are in contact with the central filter 8 to surely expand the upper folds 9a and the lower folds 10a. Becomes possible.

Further, according to the present embodiment, an upper protruding piece 26 extending in the opening 21 is formed on the upper side 25 side of the face contact body 3, and the upper protruding piece 26 is formed on both sides of the nose when worn. Since it adheres to the surface, the adhesion around the nose can be ensured. In this case, the upper protruding piece 26 may be brought into close contact with at least a part of the nose.

Further, according to the present embodiment, since the pair of upper protruding pieces 26 are formed so as to widen the space downward along the shape of the nose portion, the adhesion around the nose is further improved. At the same time, the filter portion 2 can be pushed by the upper protruding piece 26 and expanded three-dimensionally to secure a space portion.

Further, according to the present embodiment, one end 4a of the hanging string 4 is joined to both upper corners of the filter portion 2 near the lower end of the upper side portion 5, and the other end 4b of each is approximately 1/4 in the vertical direction of the filter portion 2. Since it is joined to the side side portion 7a at the height of the above, it becomes easy to spread the filter portion 2 in the vertical direction, and the filter portion 2 hooked on the chin portion is pulled by the hanging string 4, so that it is below the chin portion. It is possible to prevent the filter unit 2 on the side from turning over.

Further, when the other ends 4b of each of the hanging strings 4 are joined to the lowermost corner portions of the filter portion 2, the lower side portion 6 of the filter portion 2 is pulled by the hanging string 4, so that the throat portion becomes painful. Or, since it becomes troublesome, these problems can be solved by joining to the side side portion having a height of about 1/4 in the vertical direction as in the present embodiment.

Further, according to the present embodiment, since the tips of the pair of lower projecting pieces 24 and the pair of upper projecting pieces 26 are each formed in a square shape, those corners are near the center of the central filter 8 of the filter unit 2. It becomes easy to be caught in the filter portion 2, and the vicinity of the center of the central filter 8 of the filter portion 2 can be reliably and easily spread into a three-dimensional shape with the vicinity of the center as the top.

Further, according to the present embodiment, since the tips of the lower protruding piece 24 and the upper protruding piece 26 extend so as to have the same height in the vertical direction in the filter portion 2, the lower protruding piece 24 and the upper protruding piece 24 Since the tips of the 26s are spread close to each other at the same height as the central filter 8 of the filter unit 2, the pressing force is concentrated near the center of the central filter 8, and the upper folds 9a and the lower folds 10a are spread. It can be surely expanded three-dimensionally.

Further, according to the present embodiment, when the curved portion 31a is formed inside the side side portion 30, the upper side portion 5 and the lower side portion 6 are pulled so as to be separated from each other and spread in the vertical direction. The tensile width can be secured, and when it becomes substantially straight, the adhesion to both cheeks can be improved.

(Second Embodiment)
FIG. 7 is a rear view showing the mask of the second embodiment of the present invention.

It should be noted that the same or corresponding parts as those in the first embodiment are designated by the same reference numerals, and the duplicate description will be omitted.

As shown in FIG. 7, in the mask 1A of the present embodiment, an arc-shaped protruding portion 29 is formed in place of the upper protruding piece 26 of the first embodiment. An inverted V-shaped opening 29a having a shape different from that of the inverted V-shaped opening 28 of the first embodiment is formed between the arc-shaped protrusions 29.

The arc-shaped projecting portion 29 is gently curved in the left-right direction from the center of the upper side portion 25 of the annular portion 20 in the left-right direction toward the bottom, and is formed up to the left-right side portions 30. Circular arc-shaped projecting portion 29 is configured so as to be in close contact along both sides of the nose portion when worn.

Specifically, when the mask 1A of the present embodiment is pulled so as to separate the upper side portion 5 and the lower side portion 6 and spread in the vertical direction, the mask 1A is upward so that the tips of the arc-shaped protrusions 29 approach each other. At the same time, a force that deforms the inverted V-shaped opening 29a vertically acts. Therefore, the inverted V-shaped opening 28 has a wide contact area with respect to the side surface of the nose portion, and is strongly pressed against the side surface of the nose portion, and the frictional force is increased to further improve the adhesion around the nose. it can. Since these actions and effects are the same as those of the first embodiment, the description thereof will be omitted.

(Third Embodiment)
FIG. 8 is a rear view showing a mask according to a third embodiment of the present invention.

As shown in FIG. 8, in the mask 1B of the present embodiment, the lower protruding piece 24 is not formed on the lower side portion 22 side of the first embodiment, and the hook portion 23 is longer than that of the first embodiment. It is formed.

As described above, in the present embodiment, since the hooking portion 23 is formed longer than that of the first embodiment, the hooking effect of the jaw portion is enhanced, and the jaw portion is reliably and easily hooked on the hooking portion 23. can do. Since other configurations and operations are the same as those in the first embodiment, the description thereof will be omitted.

(Other embodiments)
Although each embodiment of the present invention has been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other embodiments, and various omissions, replacements, changes, and combinations can be made without departing from the gist of the invention. These embodiments are included in the scope of the invention described in the claims and the equivalent scope thereof, as are included in the scope and gist of the invention.

In each of the above embodiments, the pair of hanging strings 4 are hooked on the left and right ears of the wearer, but the present invention is not limited to this, and the upper and lower straps are hung around the wearer's head. You may.

Further, in each of the above embodiments, an example in which two upper folds 9a and two lower folds 10a are formed in the vertical direction of the central filter 8 has been described, but the present invention is not limited to this, and the upper folds 9a and the lower folds 10a are respectively formed. It may be formed one by one, or only one set may be widely folded in a mountain or valley near the center of the filter portion 2.

Further, in each of the above embodiments, an example in which the filter portion 2 is formed into a substantially heptagon has been described, but the present invention is not limited to this, and other polygonal shapes may be used.

Then, without being limited to each of the above embodiments, when the filter unit 2 is expanded in the vertical direction, the face contact body 3 is elastically deformed so as to follow up and down, and the left and right sides of the face contact body 3 are elastically deformed. Any structure may be used as long as it is configured to be in close contact with the shape of the face.

(Example)
Next, a specific example of the mask of the first embodiment will be described.

FIG. 9 is an explanatory diagram showing a specific embodiment of the mask according to the present invention. Note that FIG. 9 is a quantitative fit test, which is a result of quantitatively measuring the leakage of the mask. Further, in FIG. 9, FF is a Fit Factor, and is a value obtained by dividing the number of particles outside the mask by the number of particles inside the mask.

In this embodiment, the testing machine uses the Porter Counter Pro 8038 manufactured by TSI of the United States as a fit tester, the test method is N95 companion mode (N95 on mode), and the evaluation operation is exercise by 8 operations. The wearer A and the wearer B have different face sizes. As a result of performing these exercises on a general pleated mask and the mask 1 (wearer A and wearer B) of the first embodiment in which the filter unit 2 is laminated in the four layers shown in FIG. The results shown in FIG. 9 were obtained for the total protection count and the average leakage rate.

According to FIG. 9, in each exercise, the total protection count and the average leakage rate of the mask 1 of the first embodiment are significantly improved for both the wearer A and the wearer B as compared with the general pleated mask. It has been found.

Such a result is that when the mask 1 of the first embodiment is worn, the adhesion to the face is extremely high, so that there is no gap with the face and leakage of dust and the like is prevented. ..

1 ... Mask 2 ... Filter part 2a ... Water absorption filter 2b ... Pre-filter 2c ... Main filter 2d ... Water absorption filter 3 ... Face-contact body 4 ... Hanging string 4a ... One end 4b ... Other end 5 ... Upper side 6 ... Lower side 7 ... Side Side 7a ... Straight side 7b ... Inclined side 8 ... Central filter 9 ... Upper filter 9a ... Upper fold 10 ... Lower filter 10a ... Lower fold 11 ... Upper mountain fold 12 ... Upper valley fold 13 ... Lower mountain Folded portion 14 ... Lower valley fold portion 15 ... Upper folded portion 16 ... Lower folded portion 17 ... Nose clip 20 ... Circular portion 20a ... Peripheral portion 21 ... Opening 22 ... Lower side portion 23 ... Hooking portion 24 ... Lower protruding piece 25 ... Upper side 26 ... Upper protruding piece 27 ... Trapezoidal opening 28 ... Inverted V-shaped opening 29 ... Arc-shaped protrusion 30 ... Side side 31 ... Curved opening 31a ... Curved portion

Claims

Made of breathable sheet material, at least one fold extending laterally is formed, and when worn, the fold extends vertically to cover at least the nose and mouth, and a filter portion.
It is formed in an annular shape with an elastically deformable plate material, and the peripheral edge portion of the annular shape is joined to the filter portion, and when worn, it comes into contact with the face and an opening is formed at least at a position corresponding to the nose portion and the mouth portion. With the face
A hanging string for attaching the filter portion and the face contact body to the face by hanging around either the head portion or the ear portion is provided.
When the filter portion is expanded in the vertical direction, the face contact body is elastically deformed so as to follow up and down, and the left and right sides of the face contact body are elastically deformed so as to be in close contact with each other along the shape of the face. A mask characterized by being.
The face contact body is provided with a hooking portion for hooking at least a part of the face on the annular portion when worn.
A protruding piece extending into the opening is formed in the vicinity of the hooking portion.
The hooking portion is provided on the lower side of the annular portion, and the protruding pieces are formed so as to extend into the opening on both sides of the hooking portion, and the hooking portion is hooked on the jaw portion when mounted. The mask according to claim 1, wherein the mask is configured to be stopped.
The projecting pieces are lower projecting pieces formed in pairs on the lower side of the annular portion symmetrically with respect to a center line extending in the vertical direction, and these lower projecting pieces are narrowly spaced upward. The mask according to claim 2, wherein the mask is formed so as to be.
In the facial contact body, an upper protruding piece that projects like a tongue piece is formed in the opening on the upper side of the annular portion so that the upper protruding piece is in close contact with at least a part of the nose when worn. The mask according to claim 1, wherein the mask is configured.
The upper projecting pieces are formed in pairs symmetrically with respect to the center line extending in the vertical direction, and these upper projecting pieces are formed so as to be widely spaced downward along the shape of the nose. The mask according to claim 4, wherein the mask is provided.
The filter portion is formed in a polygonal shape, one ends of the hanging cords are joined to both upper corners thereof, and the other ends of the hanging cords have a height of approximately 1/4 in the vertical direction of the filter portion. The mask according to claim 1, wherein the mask is joined to the side surface.