JP6920768B1 - mask - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mask which fits a wearer's face better and alleviates discomfort and discomfort when worn. SOLUTION: A mask 1 has a central curve CL in the center in the width direction, and the central curve CL is a first arc that covers a back part of the nose of a wearer when worn, and a separation between a mask body 2 and a nose hole. The second arc that constitutes the space and the third arc that forms the separated space between the mask body 2 and the mouth are smoothly connected to form a convex substantially arc shape. Both ends 23 of the mask body 2 are configured such that the distance from the virtual straight line connecting the upper end and the lower end of the central curve CL is shorter than the lower end. The mask body 2 is composed of an outer layer, an intermediate layer, and an inner layer, and the intermediate layer is composed of a non-woven fabric. The intermediate layer has a function as a filter for preventing the spread of viruses and droplets and preventing the invasion of viruses and pollen, and also functions as a core for maintaining the three-dimensional shape of the mask body 2 when worn. [Selection diagram] Fig. 1

Description

The present invention relates to a mask that is worn on the face to cover the mouth and nose, prevents droplets, dust, dust, pollen, viruses, microorganisms, etc. from entering the body, protects the throat, and the like. In particular, the present invention relates to a mask that improves the adhesion between the face and the mask and alleviates discomfort and discomfort when worn.

In recent years, the damage caused by the epidemic of the new coronavirus has spread worldwide. At present, humans do not have sufficient antibodies against the new coronavirus, and there is no effective therapeutic drug, so the rapid epidemic of the new coronavirus has put the world in a pandemic state. In order to protect themselves and prevent infection to others, it is recommended to wear a mask when going out, and conventional mask consumers (mainly when infected with a virus such as influenza, when suffering from a cold, virus, etc.) Preventing the invasion of pollen into the body, other than those who need to use it for hygiene work such as treatment and disinfection, cooking and feeding), those who have no particular physical condition, and those other than hygiene work Even in the scene, it was decided to wear a mask regardless of age and gender.

As a result, there was an excessive demand for masks to disappear from the market at one point, and in response to this, a variety of masks were offered to the market as a result of entry into the mask market from formats that had not previously manufactured masks. Has been done.
Many of these masks have various functions, but in the future, where there are concerns about the second wave of the new coronavirus and the outbreak of the second and third new viruses, self-defense and infection to others In order to prevent this, it is desired to develop a mask that comes into close contact with the face, and that the wearing time becomes longer and the number of situations that need to be worn increases. Therefore, it is desired to develop a mask that further reduces discomfort and discomfort when worn.

Conventionally, the mask has been subjected to various processing in order to improve the wearability on the face.
Three-dimensional masks are commercially available because they fit the face better and are easier to wear. From the viewpoint of storage stability, many three-dimensional masks have a flat shape when not in use, and many masks are expanded to form a three-dimensional shape when worn.
Such a three-dimensional mask has pleats in the mask body as a means for forming the three-dimensional shape, and the pleats are opened when the mask is worn to form a three-dimensional shape (hereinafter referred to as a pleated mask). There is a mask that bulges forward and expands when worn to form a three-dimensional shape (hereinafter referred to as a three-dimensional mask).

However, with the pleated mask, when worn, a gap is formed between both sides of the mask body and the cheek portion of the wearer, and perfect adhesion to the face cannot be obtained. Therefore, even if the mask is worn, the outside air is directly taken in from this gap during breathing, and the function as a mask is impaired.
In the three-dimensional mask, the gap between the mask body and the cheek portion of the wearer is smaller than that in the pleated mask, but the three-dimensional mask also has various problems in its adhesion.
For example, when the wearer moves his / her jaw by opening / closing the mouth or chewing, the wearing position of the mask may shift (slide up or down).
In addition, when the wearer wears glasses together with the mask, the lenses of the glasses may become cloudy due to the humidity generated by the wearer's own inspiration.

In addition to the adhesiveness, when wearing the mask, if there is not enough space between the wearer's nose and mouth and the mask, it will be stuffy, and if there is not enough space near the mouth, it will be difficult to talk. Depending on the shape, the shape of the ear hook, and the material of the mask, there are many problems related to the wearability of the mask, such as the burden on the wearer's ear that hooks the mask, which may cause discomfort, discomfort, and even pain.

Regarding the mask to be worn on the face, a mask having an excellent fit to the face has been published (for example, Patent Document 1).
According to the technique described in Patent Document 1, a horizontally long mask body that covers at least the mouth of the face and rubber that is attached to both sides of the horizontally long mask body to hang on the ears in the long direction. A mask made of a string-like member such as a string, in which the length between both ends of the upper edge of the mask body is shorter than the length between both ends of the lower edge, and the length of the mask body is long. Since both edges in the direction are formed to be the same as or at least inside the line connecting the upper and lower ends, both ends of the mask body can easily follow the face, so that when the mask is worn. It is possible to improve the fit to the face by making it difficult for a gap to be formed between the vicinity of the center on both sides of the mask body and the cheek. In order to further improve the fit to the face, the mask is characterized in that the center of the upper edge and the lower edge of the mask body is formed so as to protrude vertically, and the fit to the face. It is characterized by having a bulge forward at approximately the center of the mask body, as it improves breathing and conversation because there is space near the nose and mouth when wearing the mask. The mask to be said is open to the public.

However, in the technique described in Patent Document 1, the fit to the face is improved by forming both side edges of the mask main body in the long direction the same as or at least inside the line connecting the upper and lower ends. In order to further improve the fit, the mask is formed so that the center of the upper edge and the lower edge of the mask body protrudes vertically, and the fit to the face is improved. There is a description that a space is created near the nose and mouth when the mask is worn, so that breathing and conversation can be performed smoothly. None of these are specific, and the effects of the composition, such as improving the fit of the mask to the face, are merely expectations.
Therefore, in view of the problems related to the wearability of the mask (adhesion, reduction of discomfort and discomfort when worn), the inventor of the present application has diligently studied with reference to the dimensional data of the average Japanese head. As a result, the present invention has been completed.

Japanese Unexamined Patent Publication No. 2005-261894

An object of the present invention is to provide a mask that fits the wearer's face better and reduces discomfort and discomfort when worn.

In the invention according to claim 1, a main body portion that covers at least the nose hole and mouth of the wearer, and a pair of ears that are hung on the wearer's ears to arrange the main body portion on the wearer's face. A mask including a hanging portion, wherein the direction in which the wearer's nose and mouth are connected in a straight line when the mask is worn is defined as a vertical direction, and the direction in which the left and right ears are connected in a straight line is defined as a width direction. When the direction from the mouth to the nose is defined as the upper side and the direction from the nose to the mouth is defined as the lower side, the main body has a central curve located at the center in the width direction and both ends which are ends in the width direction. A side having a portion, an upper end portion which is an upper end in the vertical direction, and being folded from the central curve to form a flat surface and expanding to form a three-dimensional shape, which is in contact with the wearer's face when worn. It is composed of an inner layer provided in the above and an outer layer provided on the side in contact with the outside air, and an intermediate layer is provided between the inner layer and the outer layer. A virtual straight line formed by laminating, shorter than the main body in the width direction, provided in a portion excluding both ends, and the main body is formed by connecting the upper and lower ends of the central curve. A straight line, a first straight line orthogonal to the virtual straight line at a position 0.40 to 0.45 times the length of the virtual straight line from the upper end of the virtual straight line, and a length from the first straight line to the virtual straight line. It has a second straight line orthogonal to the virtual straight line at a position of 0.06 to 0.16 times, and the central curve is formed by smoothly connecting three arcs in the planar side view. It has a convex substantially arc shape, and the three arcs are arranged in order from the upper end to the lower end of the central curve, and the first arc is a straight line connecting the upper end and the first straight line of the virtual straight line. The angle formed between the chord and the virtual straight line is 25 ° ≤ 35 °, and the arc is such that the chord drawn toward the virtual straight line side from the chord is perpendicular to the second magnitude. It has a center point on a straight line that divides, and is formed with both ends of the string as start points and end points, respectively. An arc whose chord is a straight line connecting the straight lines, and the arc has a center point on a straight line that vertically divides the chord drawn toward the virtual straight line side from the chord. Both ends of the chord are formed as a start point and an end point, respectively, and the arc is configured so as to protrude most on the central curve. , Said virtual line It consists of an arc whose chord is a straight line connecting the lower ends of the line, and the arc has a center point on a straight line that vertically divides the chord drawn toward the virtual straight line side from the chord and divides the chord into two equal parts. Both ends are formed as a start point and an end point, respectively . The lower end is arranged below the position where the virtual straight line is divided into two equal parts, and the angle formed between the virtual straight line and the straight line connecting the lower end of the virtual straight line and the lower ends at both ends is a sharp angle. The length of the straight line orthogonal to the virtual straight line and connecting the virtual straight line and the upper ends of the both ends is shorter than the length of the straight line orthogonal to the virtual straight line and connecting the virtual straight line and the lower ends of the both ends. Provided is a mask characterized by being constructed.
In the invention according to claim 2, the ear hook portion has a string-like member, and the string-like member is a cloth that has not been cut and is not processed, and the cloth is made of a knitted fabric. The mask according to claim 1 is provided.
The invention according to claim 3 provides the mask according to claim 1 or 2, wherein the intermediate layer is adhered to the inner layer.
The invention according to claim 4 is characterized in that the upper end portion is provided with a linear or strip-shaped shape-retaining member having plasticity that can be deformed from the nose base of the wearer along the shape below the eye. The mask according to claim 1 to 3 is provided.
In the invention according to claim 5, the mask according to claim 1 to 4, wherein the intermediate layer contains a non-woven fabric having an antiviral function.

According to the invention of claim 1, a main body portion that covers at least the nose hole and the mouth of the wearer, and a pair of a main body portion that is hung on the wearer's ear to arrange the main body portion on the wearer's face. A mask including an ear hook portion, wherein the main body portion has a central curve located at the center in the width direction, both end portions which are ends in the width direction, and an upper end portion which is an upper end portion in the vertical direction. By folding it from the central curve, it becomes flat and expands to form a three-dimensional shape. It is provided on the inner layer provided on the side that contacts the wearer's face when worn and on the side that contacts the outside air. An intermediate layer is provided between the inner layer and the outer layer, and the intermediate layer is formed by stacking one non-woven line or two or three non-woven lines, and the main body portion in the width direction. It is shorter and is provided in a portion excluding both ends, and the main body portion is a virtual straight line which is a straight line formed by connecting the upper and lower ends of the central curve, and the virtual straight line from the upper end of the virtual straight line to the virtual straight line. At a position 0.40 to 0.45 times the length, a first straight line orthogonal to the virtual straight line, and at a position 0.06 to 0.16 times the length of the first straight line to the virtual straight line. It has a second straight line orthogonal to the virtual straight line, and the central curve is a convex substantially arc shape formed by smoothly connecting three arcs in the planar side view, and the three arcs are , Arranged in order from the upper end to the lower end of the central curve, the first arc is an arc having a straight line connecting the upper end and the first straight line of the virtual straight line as a string, and the string and the virtual straight line. The angle formed between the two is 25 ° ≤ 35 °, and the arc has a center point on a straight line that vertically divides the string drawn toward the virtual straight line side from the string. The second arc is formed with both ends of the first arc as a start point and an end point, respectively, and the second arc is an arc whose chord is a straight line connecting the contact point between the string of the first arc and the first straight line and the second straight line. The arc has a center point on a straight line that vertically divides the chord drawn toward the virtual straight line side from the chord, and is formed with both ends of the chord as a start point and an end point, respectively. The arc is configured so that it protrudes most on the central curve, and the third arc is a straight line connecting the string of the second arc, the contact point between the second straight line, and the lower end of the virtual straight line. to Ri Do from the arc, the arc has a center point on the straight line bisecting vertically chords drawn to the imaginary straight line side of the chords, respectively starting from the ends of the chord, and as an end point Contact is formed Runode, at the time of mask worn Therefore, the wearer can easily breathe through the nose without feeling stuffy, easily open and close the mouth during conversation, and can prevent the wearer from feeling stuffy during conversation. The mask can be fitted more tightly to the wearer's face in the portion without the layer, and the discomfort when wearing the mask can be reduced.
Further, at both ends of the planar side view, the upper ends of the both ends are arranged above the position where the virtual straight line is divided into two equal parts, and the lower ends of the both end portions divide the virtual straight line into two equal parts. The angle formed between the virtual straight line and the straight line connecting the lower end of the virtual straight line and the lower ends at both ends thereof is a sharp angle, which is orthogonal to the virtual straight line and is orthogonal to the virtual straight line. Since the length of the straight line connecting the upper ends of both ends is orthogonal to the virtual straight line and shorter than the length of the straight line connecting the virtual straight line and the lower ends of both ends, a mask is worn. At times, the mask and the wearer's cheeks can be better fitted.
According to the invention of claim 2, the string-shaped member of the ear hook is a cloth that has not been cut and is not treated, and the cloth is made of knitted fabric. Therefore, the string-shaped member is hung on the ear. Since the pain and discomfort that occur in the ear can be reduced and the knot can be easily untied, the length of the ear hook can be easily adjusted.
According to the invention of claim 3, since the intermediate layer is adhered to the inner layer, when the mask takes a three-dimensional shape, the inner layer does not separate from the intermediate layer, and it is difficult to breathe and talk when wearing the mask. It is possible to reduce discomfort such as.
According to the invention of claim 4, since the upper end portion is provided with a linear or strip-shaped shape-retaining member having plasticity that can be deformed from the nose root of the wearer along the shape under the eye, the mask is a nose root. It fits better on the wearer's face from the bottom to the bottom of the eye, further enhances the airtightness of the space created between the mask and the wearer's face, and can further prevent the wearer's own exhalation from escaping from the site. can.
According to the invention of claim 5, since the intermediate layer contains a non-woven fabric having an antiviral function, it is possible to more effectively suppress the spread of the virus and the invasion into the body.

It is a figure which shows the structure of the mask 1 which was folded and became flat in this Example, and is the enlarged view of the ear hook part 3. It is a figure which shows the virtual line which forms the shape of the mask body 2 in this Example. It is a front view of the mask 1 at the time of wearing in this Example. It is a side view of the mask 1 at the time of wearing in this Example.

Hereinafter, preferred embodiments of the mask of the present invention will be described in detail with reference to FIGS. 1 to 4.
(1) Outline of Embodiment The mask 1 in this embodiment has a central curve CL in the center in the width direction, and the central curve CL is a first arc A1 that covers the back of the nose of the wearer when worn, and a mask body. The second arc A2 forming the separation space S between the mask body 2 and the nose hole, and the third arc A3 forming the separation space S between the mask body 2 and the mouth are smoothly connected to form a convex abbreviation. It is constructed in an arc shape. Both ends 23 of the mask body 2 are configured such that the distance from the virtual straight line VL connecting the upper end P1 and the lower end P2 of the central curve CL is shorter than the lower end. The mask body 2 is composed of an outer layer, an intermediate layer, and an inner layer, and the intermediate layer is composed of a non-woven fabric. The intermediate layer has a function as a filter for preventing the spread of viruses and droplets and preventing the invasion of viruses and pollen, and also functions as a core for maintaining the three-dimensional shape of the mask body 2 when worn.

(2) Details of the Embodiment In the description of the present embodiment, the direction connecting the wearer's nose and mouth in a straight line is defined as the vertical direction, and the direction connecting the left and right ears in a straight line is defined as the width direction. The direction from the mouth to the nose is defined as the upper side, the direction from the nose to the mouth is defined as the lower side, the direction from the right ear to the left ear is defined as the left side, and the direction from the left ear to the right ear is defined as the right side.
In addition, the values of "nose height", "philtrum", "morphological face height", "inter-pupil width", "external eye angle width", "mouth fissure width", and "total red lip height" of Japanese adolescent men used in this disclosure are , (Japanese) Makiko Kawauchi and Masaaki Mochimaru, 2005 AIST Human Body Dimension Database, National Institute of Advanced Industrial Science and Technology H16PRO 287. It is the value described in Ear Exhibition 5: 44-76, 1962.

FIG. 1A shows a diagram showing the configuration of the left side surface of the folded and flat mask 1 to which the present embodiment is applied.
The mask 1 includes a mask main body 2 which is a main body of the mask, and an ear hook 3 for hanging the mask 1 on the wearer's ear and arranging the mask 1 on the wearer's face.
The mask body 2 is a three-dimensional mask that can be folded in a plane from the central curve CL described later in the width direction when not in use, and the mask body 2 is expanded to have a three-dimensional shape when in use. Since the mask body 2 has a three-dimensional shape, a separation space S, which is a space formed between the mask body 2 and the wearer's face, is secured. The mask body 2 is symmetrically configured via the central curve CL. In this description, the configuration on the left side of the central curve CL of the mask main body 2 will be described, but the configuration on the right side of the central curve CL will be the same.
The mask main body 2 has a central curve CL, an upper edge portion 21, a lower edge portion 22, both end portions 23, and an abutting portion 24, and is composed of an inner layer, an intermediate layer, and an outer layer.

The inner layer is a layer provided on the side in contact with the wearer's face when worn, the outer layer is a layer provided on the side in contact with the outside air, and the intermediate layer is a layer provided between the inner layer and the outer layer. Is.
Both the inner layer and the outer layer are breathable materials, and the material used for the inner layer is preferably a material that is soft to the touch because the inner layer touches the wearer's skin. As a material suitable for the inner layer, specifically, knitting is suitable, but it may be formed by using a non-woven fabric or the like which is soft to the touch. Further, it is preferable that the mask 1 is washable and can be used repeatedly by washing. In this embodiment, the inner layer and the outer layer are formed of Tenjiku cotton.
The inner layer and the outer layer may be made of the same material or may be made of different materials. In addition, the materials used for the inner layer and the outer layer can be appropriately selected depending on the season and application. For example, when the temperature is high, such as summer, the inner layer can be selected from a material having a cool feeling or a mesh material, and the discomfort during wearing can be reduced. Further, by using a material that blocks ultraviolet rays in the outer layer, sunburn can be prevented.

The intermediate layer has a function as a filter for preventing the spread of viruses, droplets, etc. from the wearer and preventing the invasion of viruses, pollen, etc. into the wearer's body. It also functions as a core for better maintaining the three-dimensional shape of the mask body 2 when worn. By maintaining the three-dimensional shape of the mask body 2 better, the separation space S formed between the mask body 2 and the nostrils and mouth can be more appropriately maintained.
The intermediate layer is a breathable non-woven fabric, and is formed by a single layer or by laminating 2 to 3 sheets.
As the non-woven fabric, a known non-woven fabric produced by a melt blow method, a spun bond method, a spun lace method, an air through method, a thermal bond method, a point bond method, a stitch bond method, a chemical bond method, a needle punch method or the like is appropriately selected. As the basis weight of the non-woven fabric, for example, a mass of 20 to 50 g / m2 can be used.
As the intermediate layer, it goes without saying that a non-woven fabric that serves as a filter can be used, and in addition, a non-woven fabric having an antibacterial action can be used.
Further, since the intermediate layer also functions as a core for maintaining the three-dimensional shape of the mask body 2 when the mask 1 is worn, it is preferable to use a relatively strong non-woven fabric. When the non-woven fabrics are laminated and formed, the preferable strength of each non-woven fabric varies depending on the number of non-woven fabrics to be laminated. Therefore, the strength of each non-woven fabric is appropriately selected depending on the number of non-woven fabrics to be laminated and the like.
When the intermediate layers are laminated, the laminated non-woven fabrics are integrated by adhesion or the like. For example, each non-woven fabric can be adhered by using a non-woven fabric having thermoplasticity.

The intermediate layer is adhered to the inner layer. By adhering the intermediate layer to the inner layer, when the mask body 2 takes a three-dimensional shape, the inner layer does not separate from the core intermediate layer, and the inner layer is attracted to the wearer's nostrils and mouth by the intake air during wearing. Can be suppressed. As a result, it is possible to reduce discomfort such as suffocation when wearing the mask 1 and difficulty in conversation.
Further, by adhering the intermediate layer only to the inner layer without adhering to the outer layer, it is possible to reduce wrinkles generated in the outer layer when the mask 1 is washed when the mask body 2 is formed of knitting or the like.
The intermediate layer is preferably bonded to the inner layer using a thermoplastic non-woven fabric, as in the case where the intermediate layer is formed by laminating non-woven fabrics. By using a thermoplastic non-woven fabric, the intermediate layer can be uniformly adhered to the inner layer. If there is no discomfort when wearing the mask 1, the intermediate layer may be joined to the inner layer by sewing or the like in addition to adhesion.

The inner layer and the outer layer are formed in substantially the same shape. In order to improve the appearance of the mask body 2 when the mask 1 is worn, when the inner layer is hidden by the outer layer, the inner layer may have a shape reduced with respect to the outer layer. The intermediate layer is formed to be shorter in size than the inner layer and the outer layer in the width direction.

In this embodiment, the mask body 2 is formed by sewing. When the inner layer and the outer layer are non-woven fabrics, the mask body 2 can be formed by adhesion, joining, or the like.
The outer layer and the inner layer are formed by sewing two sheets constituting the left and right sides of the mask body 2, respectively.
As for the outer layer and the inner layer, first, the left and right joint portions of the outer layer and the left and right joint portions of the inner layer are sewn. Subsequently, the shapes of the outer layer and the inner layer are matched, and the periphery thereof is sewn together to join the outer layer and the inner layer to form the mask body 2.
In addition, the mask body 2 may be formed by stacking four left and right layers of the outer layer and the inner layer, sewing the left and right joint portions at once, unfolding the outer layer and the outer layer, and sewing the periphery thereof to form the mask body 2. good.
The intermediate layer is adhered to the inner layer before joining the left and right sides of the inner layer.

When the outer layer and the inner layer are sewn individually and then the periphery of the outer layer and the inner layer is sewn together, the outer layer and the inner layer are separated except for the periphery. Alternatively, it is preferable to provide a seam that is provided so as to penetrate from the outer layer to the inner layer at a position along the seam.
The seams to be applied may be short. For example, in the case of sewing with a sewing machine, it can be shortened by about 0.3 cm to 1 cm, and in the case of hand-sewn, it can be further shortened. By providing the seam, when the mask body 2 takes a three-dimensional shape, it is possible to further prevent the mask body 2 from being attracted to the nostrils and mouth by the wearer's inspiration during wearing.
The seam is provided at any position in the vertical direction of the seam of the left and right joint portions of the mask body 2 as long as the mask body 2 can be suppressed from being attracted to the wearer's intake air when worn. May be done.

FIG. 2A is a diagram showing virtual lines forming the shape of the mask body 2 in this embodiment.
When designing the shape of the mask 1, it is important to improve the fit of the mask to the wearer and reduce discomfort and discomfort when wearing it. In order to solve these problems, the size and shape of the wearer's face It is necessary to consider the characteristics of. With the shape design of the mask, which is far from the size and characteristics of the face, the fit when worn is naturally poor, the mask itself is displaced from the proper placement position on the face, it is painful to wear it for a long time, and conversation. Occasionally, if the mask is not moved, it will be difficult to talk, and this will not play a role in preventing the invasion of viruses and pollen, which are the original functions of the mask, into the body.
Therefore, the present inventor has designed a mask shape that improves the fit of the mask to the wearer and reduces discomfort and discomfort when worn by referring to the dimensional data of the average Japanese head. It is a thing.

The central curve CL is the center of the mask body 2 in the width direction and is a curve that divides the mask body 2 into two equal parts.
The central curve CL is formed in a convex substantially arc shape. By forming the central curve CL in a substantially arc shape, the mask body 2 is between the wearer's face, the wearer's nose tip, the mouth, and the chin when locked to the wearer's nose and chin. Can keep a certain distance.
The substantially arc shape of the central curve CL is formed by smoothly connecting three arcs, Ark1, Ark2, and Ark3. "Smoothly connected" means that not only no pointed portion or corner portion is formed in the connected portion, but also the connected portion is connected so as to draw one curve as a whole.

P1 is the upper end of the central curve CL, and P2 is the lower end of the central curve CL.
The virtual straight line VL is a straight line connecting the upper end P1 and the lower end P2 of the central curve CL.
L1 is a virtual straight line orthogonal to the virtual straight line VL.
L2 is a virtual straight line orthogonal to the virtual straight line VL and arranged below L1.
VLa is the length between the contact point between the virtual straight line VL and L1 and P1, and constitutes a portion corresponding to the height of the nose in the vertical direction (hereinafter referred to as the nose height) in the side view of the mask body 2. ..
VLb is the length between the contact point between the virtual straight line VL and L1 and the contact point between the virtual straight line VL and L2. The VLb constitutes a linear distance from the wearer's lower nose point to the upper lip point, that is, a so-called philtrum portion, in the vertical direction in the lateral view of the mask body 2.
VLc is the length between the contact point between the virtual straight line VL and L2 and P2. The VLc constitutes a portion substantially corresponding to the upper lip point to the lower jaw of the wearer in the vertical direction in the lateral view of the mask body 2.

Next, the lengths of VLa, VLb, and VLc will be described.
The virtual straight line VL is divided by L1 and L2 so that VLb <VLa <VLc.
The average nose height of Japanese adolescent men is 52.2 mm. The average value in the philtrum of adolescent men is 13.7 mm. The average value of the distance from the most depressed point of the nose root in the human body to the lowest point of the lower jaw (hereinafter referred to as morphological facial height) in adolescent males is 123.9 mm.
When the mask 1 is worn, the ear hook 3 is hung on the wearer's ear, so that the mask body 2 is pulled in the width direction. Therefore, the vertical length of the virtual straight line VL is flat when worn. It will be shorter than in the case of. Therefore, when the nose height and the philtrum length in the above-mentioned adolescent male are directly applied to the VLa and VLb of the mask body 2 in a flat state, the lengths of the VLa and VLb are different when the mask 1 is worn. It may be shorter than the above nose height and philtrum length.

Therefore, in this embodiment, the lengths of VLa and VLb are determined by the ratio of the nose height and the length in the philtrum to the length of the virtual straight line VL.
The morphological face height corresponds to the length of the virtual straight line VL when the mask 1 is worn.
In the above-mentioned average adolescent male nose height and philtrum face height, the nose height is about 0.42 times the morphological face height, and the philtrum face height is about 0.11 times the morphological face height.
As a result, the ratios of VLa and VLb to the virtual straight line VL can be about 0.42 times and about 0.11 times, respectively, and L1 is about 0.42 times the length of the virtual straight line VL from P1. It is arranged so as to be orthogonal to the virtual straight line VL at the position, and L2 is arranged so as to be orthogonal to the virtual straight line VL at a position approximately 0.11 times the length of the virtual straight line VL from the contact point between the virtual straight line VL and L1. ..

Then, from the result of measuring the change in the length of the virtual straight line VL when the mask body 2 is pulled in the width direction when the mask 1 is worn, in the material configuration of this embodiment, the virtual surface of the mask body 2 is virtual. The length of the straight line VL was preferably 1.1 times the morphological facial height of adolescent males.
As a result, in the case of an average morphological face height of 123.9 mm in adolescent males, the length of the virtual straight line VL in the plane of the mask body 2 is about 137 mm, the length of VLa is about 58 mm, and the length of VLb is about 58 mm. The length is about 15 mm, and the total length of VLa and VLb is about 73 mm.
Here, "the composition of the material of this embodiment" means that the outer layer, the inner layer, and the ear hook portion 3 are composed of Tenjiku cotton. Therefore, the length of the virtual straight line VL with respect to the morphological face height can be appropriately changed depending on the material constituting the mask main body 2 and the configuration of the ear hook portion 3 described later.

Further, the ratio of VLa and VLb to the virtual straight line VL uses the nose height of adolescent men and the average value in the philtrum as an index, but the ratio may consider the minimum value and the maximum value in the nose height and the philtrum. , And the average value of young women, children, old people, etc. can be changed as appropriate.
For example, the minimum value of morphological face height for adolescent men is 103. mm, the maximum value is 140.0 mm, the minimum value of the nose height is 41.5 mm, the maximum value is 62.0 mm, the minimum value of the philtrum length is 7.0 mm, and the maximum value is 21.5 mm. The ratios of nose height and philtrum to morphological face height are about 0.40 times the morphological face height and about 0.06 times the philtrum face height in the philtrum, which is the maximum value. In, the nose height is about 0.44 times the morphological face height, and in the philtrum, it is about 0.15 times the morphological face height.

Crd1 is a virtual straight line formed by connecting L1 and P1. Crd1 is a portion that covers the back of the nose of the wearer when the mask 1 is worn.
The angle θ1 is an angle formed between Crd1 and the virtual straight line VL. It is preferable that θ1 is configured such that 25 ° ≦ 35 °.
Ark1 is a first arc having Crd1 as a chord. From FIG. 2A, Ark1 is a perpendicular line that bisects Crd1 and has its center point on a perpendicular line drawn on the virtual straight line VL side from Crd1. More specifically, the center point of Ark1 in FIG. 2A is on a perpendicular line that bisects Crd1 drawn on the virtual straight line VL side from Crd1, and the length of Crd1 from the contact point between the perpendicular line and Crd1. It is located at the same distance as. That is, the length of Crd1 and the length of the perpendicular line from the contact point with Crd1 to the center point are the same. Ark1 has both ends of Crd1 as a start point and an end point, respectively.

Crd2 is a virtual straight line formed by connecting the contact point between L1 and Crd1 and the contact point between L2 and Crd3 described later.
Ark2 is a second arc whose chord is Crd2. From FIG. 2A, Ark2 is a perpendicular line that bisects Crd2, and has its center point on a perpendicular line drawn on the virtual straight line VL side from Crd2. More specifically, the center point of Ark2 in FIG. 2A is on a perpendicular line that bisects Crd2 drawn on the virtual straight line VL side from Crd2, and the length of Crd2 from the contact point between the perpendicular line and Crd2. It is located at the same distance as. That is, the length of Crd2 and the length of the perpendicular line from the contact point with Crd2 to the center point are the same. Ark2 has both ends of Crd2 as a start point and an end point, respectively.
The Ark 2 is configured to protrude most on the central curve CL, and is arranged so that the distance and space between the mask body 2 and the wearer's face are maximized at a position approximately in the philtrum of the wearer. .. As a result, when the mask 1 is worn, the wearer does not feel stuffy and can breathe through the nose more easily even if the wearer has no respiratory muscle strength.
FIG. 2B is an enlarged view of the central curve CL and the vicinity of Ark2.
As shown in FIG. 2B, Crd2 is preferably configured so that the length of L2 is longer than the length of L1. As a result, Crd2 is arranged so that its upper end is inclined toward the virtual straight line VL side. By arranging the upper end of Crd2 so as to be tilted toward the virtual straight line VL, the space between the mask body 2 and the nostrils is compared with the case where Crd2 is parallel to the virtual straight line VL or when Crd2 is tilted to the left. A larger space can be formed in the nostrils, making it easier to inhale through the nostrils. The inclination of Crd2 is preferably in a range in which the central curve CL becomes a smooth curve when the mask body 2 connects the three arcs Ark1, Ark2, and Ark3 to form the central curve CL in the plane shape thereof. ..

Crd3 is a virtual straight line formed by connecting the contact point between L2 and Crd2 and P2, and Ark3 is a third arc having Crd3 as a chord. From FIG. 2A, Ark3 is a perpendicular line that bisects Crd3, and has its center point on a perpendicular line drawn on the virtual straight line VL side from Crd3. More specifically, the center point of Ark3 in FIG. 2A is on a perpendicular line that bisects Crd3 drawn on the virtual straight line VL side from Crd3, and is the length of Crd3 from the contact point between the perpendicular line and Crd3. It is located at the same distance as twice as long. That is, twice the length of Crd3 and the length of the perpendicular line from the contact point with Crd3 to the center point are the same. Ark3 has both ends of Crd3 as a start point and an end point, respectively.
The Ark 3 is configured to be arranged from the wearer's mouth to the lower jaw in the vertical direction when the mask body 2 is locked to the wearer's nose and chin when the mask 1 is worn.
The Ark3 is smoothly connected to the Ark2 which is configured to be the most protruding on the central curve CL, and forms a space between the mask body 2 and the wearer's mouth. Due to the space, when the mask 1 is worn, the wearer can easily open and close the mouth during conversation and does not feel stuffy during conversation.

When the Ark1 and the Ark2 are smoothly connected, the central curve CL is configured to be a curve that follows the arcs of both the Ark1 and the Ark2. Similarly, when connecting Ark2 and Ark3, the central curve CL is configured to be a curve that follows the arcs of both Ark2 and Ark3. The central curve CL is formed as a smooth convex substantially arc shape as a whole.
As shown in FIG. 2B, the contact points between the central curves CL and L1 extend from the contact points between Ark1 and L1. As a result, the angle θ4 formed by connecting the straight line connecting the central curves CL and L1, the contact point and P1 and the virtual straight line VL becomes larger than θ1.
The angle θ4 is preferably configured to approximate the nasal-face angle. The nasal-face angle is the angle between the tangent of the frontal region and the back of the nose.
Here, the average value of the nasal-face angle of a Japanese adolescent male is 34.3 °, the maximum value is 46.0 °, and the minimum value is 30.0 °.
In the vertical direction of the mask body 2, the nasal facial angle is formed by the tangent line of the frontal region, but θ4 is formed by the virtual straight line VL, and the virtual straight line VL is a straight line connecting from the base of the nose to the lowest point of the lower jaw. Therefore, it is not always parallel to the tangent to the frontal region.
Therefore, θ4 is preferably configured to include 30 ° ≦ 46 °. More specifically, it is preferable that θ4 is configured to be 26 ° ≦ 46 °.
The angle of the angle θ1 and the inclination of the Crd2 are adjusted so that the angle of the angle θ4 falls within the above range.

The upper edge portion 21 of the mask body 2 is formed by connecting P1 and P4 in a curved shape. In the front view when the mask body 2 is expanded, as shown in FIG. 3, the left and right upper edge portions 21 of the mask body 2 are convex curves with P1 as the apex and the center, and the ends of the convex curves. It becomes a concave curve in the P4 direction.
The upper edges 21a and 21b are portions that cover the wearer's nose root to the lower part of the eye when the mask 1 is worn, and are configured to follow the ridgeline from the nose root to the lower vicinity of the inner canthus. The inner canthus is where both eyelids meet.
The upper edge portion 21a is a convex curved portion having P1 as the apex and the center in the front view when the mask main body 2 is expanded, and is configured to follow the inclination of the nose from the base of the nose.
The upper edge portion 21b is a concave curve that continues below the eye following the end of the upper edge portion 21a, which is the end position of the inclination of the nose and the end point of the convex curve. By making the upper edge portion 21b a concave curve, it is possible to follow the ridgeline near the lower part of the inner canthus, and when the mask 1 is worn, the upper edge portion of the mask body 2 is difficult to see into the wearer's field of vision. Does not obstruct the wearer's view.
The upper edge portion 21c is a gentle concave curve that follows the upper edge portion 21b and continues to P4 at both end portions 23. The upper edge portion 21c is configured to follow the ridgeline of the cheekbone from below the eye by a gentle concave curve.

Due to the upper edge portion 21, the upper edge of the mask body 2 fits the wearer's face from the base of the nose to the cheekbone, and the sealing space S formed between the mask 1 and the wearer's face is sealed. Can be enhanced. Further, by aligning the mask body 2 with the shape below the eyes from the wearer's nose root, the wearer's own exhaled breath does not escape from the portion, and even when the wearer uses the mask 1 and the glasses together. It is possible to prevent the lens of the spectacles from becoming cloudy due to self-breathing.

The upper end portion 21 of the mask main body portion 2 has a shape-retaining member 211.
The shape-retaining member 211 is made of a known plastic or linear or strip-shaped metal or resin.
The length of the shape-retaining member 211 is preferably a length that reaches from the base of the nose to the bottom of the eye when the mask body 1 is worn. More specifically, as shown in FIG. 3, the shape-retaining member 211 has a three-dimensional shape by expanding the mask body 2, and the end of the shape-retaining member 211 has an inter-pupil width to an external eye angle width. It is configured to fit inside. The interpupil width is the linear distance between the left and right pupil centers, and the external eye angle width is the linear distance between the left and right external eye points. The average adolescent male has an interpupilal width of 61.9 mm and an external eye angle width of 93.6 mm. In this embodiment, the ends of the shape-retaining member 211 are configured to be positioned at 45.0 mm on each side of the central curve CL in the front view in a state where the mask body 2 is pulled in the width direction when the mask 1 is worn. Will be done.
The shape-retaining member 211 can ensure that the upper edge 21 of the mask body 2 is aligned with the ridgeline from the base of the wearer's nose to the lower part of the inner canthus and below the eye. As a result, the mask 1 fits better on the wearer's face from the base of the nose to below the eyes, further enhances the airtightness of the separation space S, and can further prevent the wearer's own exhaled breath from escaping from the portion.

L5 is a virtual straight line formed by connecting the lower end P2 of the virtual straight line VL and the lower end P3 of both end portions 23.
The angle θ2 is an angle formed by connecting the virtual straight line VL and L5, and is configured to be an acute angle. In this embodiment, it is preferable that the angle θ2 is formed at an angle toward the base of the lower end of the ear when the mask 1 is worn.
The lower edge portion 22 is the lower edge in the width direction of the mask main body 2, and is between the lower end P3 of both end portions 23 and the lower end P2 of the central curve CL. In this embodiment, the lower edge portion 22 is configured to follow L5. As a result, the lower end of the mask body 2 becomes substantially V-shaped in the front view with the mask body 2 expanded. In addition, the lower edge portion 22 may be configured to follow the line of the lower jaw.

FIG. 1B is an enlarged view of both end portions 23 and a part of the ear hook portion 3.
Both end portions 23 are the widthwise ends of the mask body 2, and have an upper end P4 and a lower end P3.
Both end portions 23 are formed in a tubular shape that opens in the vertical direction. The ear hook member of the ear hook portion 3, which will be described later, penetrates the tubular portion. In this embodiment, both end portions 23 have a tubular shape in the vertical direction, but when it is not necessary for the ear hook member to move freely at both end portions 23, both end portions 23 are not tubular and the ear hook portion 3 is formed. May be directly connected to both ends 23 by sewing or the like.

L3 is a virtual straight line orthogonal to the virtual straight line VL and intersecting with P3. L3 is arranged below the position where the virtual straight line VL is divided into two equal parts.
L4 is a virtual straight line orthogonal to the virtual straight line VL and intersecting with P4. L4 is arranged above the position where the virtual straight line VL is divided into two equal parts, and its length is configured to be shorter than L3. As a result, in the side view of the mask body 2, the upper ends P4 of both end portions 23 are configured to be inclined in the direction of the virtual straight line VL.
The length from P4 to P3 is preferably close to the length of the auricle attachment portion. The pinna is the part where the pinna is attached to the face. The length of the auricle can be used as an index of the length of the auricle of an average adolescent male or adolescent female. Further, in this case, the inclination of both end portions 23 is such that when the mask 1 is worn and the ear hook portion 3 is hung on the wearer's ear, the both end portions 23 and the ear hook member of the ear hook portion 3 are tilted. It is preferable that the angle θ3 formed is approximately 90 degrees.

When the length from P4 to P3 is larger than the length of the pinna, both ends 23 are pulled by the ear hook 3 when the mask 1 is worn, the center of both ends 23 is raised, or both ends 23 are wrinkled. May become. If the center of both ends 23 is raised or the ends 23 are wrinkled, a gap is formed between the mask body 2 and the wearer's cheeks, and the appearance of the mask body 2 when worn is also deteriorated. By making the length from P4 to P3 close to the length of the auricle attachment part, both ends 23 do not rise or wrinkle, and the mask body 2 and the wearer's cheeks Can be made to fit better.
Further, when the mask 1 is worn, the inclination of both end portions 23 is configured so that the angle of the angle θ3 is approximately 90 degrees, so that the load may be biased to one of the upper end and the lower end of both end portions 23. No. As a result, one of the upper end and the lower end of both end portions 23 does not rise, and the mask body 2 and the wearer's cheeks can be more fitted.

FIG. 3 is a front view when the mask 1 is worn. The portion to be shaded is the contact portion 24.
The contact portion 24 is a portion composed of only an outer layer and an inner layer without an intermediate layer in the width direction of the mask main body 2.
Since the abutting portion 24 is composed of an outer layer and an inner layer without having an intermediate layer, the mask body 2 fits the curved surface of the wearer's cheek softly as compared with the case where the abutting portion 24 has an intermediate layer. As a result, the mask body 2 can be more fitted to the wearer's face without any gaps, and the discomfort when wearing the mask 1 can be reduced.
Further, since the contact portion 24 comes into contact with the wearer's cheek by the surface, the load of the mask body 2 can be more dispersed as compared with the case where the mask body 2 contacts the wearer's cheek with a line. It is possible to prevent the mask body 2 from slipping down or rising by following the movement of the jaw such as opening and closing of the mouth when worn.

FIG. 4 is a side view when the mask 1 is worn.
The separation space S is a space formed between the mask main body 2 and the wearer's face when the mask 1 is worn. The separation space S is formed by the central curve CL, the upper edge portion 21, the lower edge portion 22, and the vicinity of the contact portion 24. In the vertical direction of the mask body 2, Ark2 is configured to protrude most on the central curve CL, forming a space between the mask body 2 and the philtrum, and Ark3 is between the mask body 2 and the wearer's mouth. Form a space in.
Further, in the front view of the mask body 2, the separation space S is configured such that the length in the width direction at the position of the wearer's lips is longer than the length of the mouth fissure width. The average adolescent male has a mouth fissure width of 47.6 mm and a total red lip height of 20.6 mm. Therefore, in the present embodiment, the separation space S has a length in the width direction of the mask body 2 in the front view at a position of approximately 20.6 mm in height of the total red lips from the upper end of Ark3 in the vertical direction of the mask body 2. It is configured to be longer than the cleft width of 47.6 mm.

With the above configuration, the separation space S is maximized at the positions of the nostrils and mouth of the wearer. Therefore, as shown in FIG. 3, when the mask 1 is worn, the space S is wider in the lower part than in the upper part. As a result, it is preferable that the upper end of the intermediate layer is inclined toward the virtual straight line VL side in the vertical direction thereof. Further, the intermediate layer is configured to cover the entire area of the separation space S.
Since the mask body 2 does not come into contact with the wearer's nostrils and mouth due to the separation space S, the mask body 2 does not easily interfere with the wearer's breathing and opening and closing of the mouth during conversation. As a result, it is possible to eliminate the difficulty of breathing and conversation when wearing the mask 1. Further, the separation space S can suppress the contact between the inner layer and the lips, and can reduce the roughness of the lips due to the friction between the inner layer and the lips and the adhesion of the lip color or the like to the inner layer.

Returning to FIG. 1, a description will be given.
The mask 1 includes an ear hook portion 3. The ear hook portion 3 hangs on the wearer's ear and arranges the mask main body 2 on the wearer's face, and is configured by connecting to the upper and lower ends P3 and P4 of both end portions 23 of the mask main body 2. ..
The ear hook portion 3 is formed of an uncut cloth. Here, "leaving" means that the cut portion of the cloth is not processed by sewing or the like and is left as it is cut.
The cloth, which is the ear hook member constituting the ear hook portion 3, is preferably made of a material that is soft to the touch, similar to the material used for the inner layer. Specifically, knitting is preferable, but it may be formed by using a non-woven fabric or the like. The ear hook member may be made of the same material as the inner layer or the outer layer, or may be made of a different material. In this embodiment, the ear hook portion 3 is formed by using Tenjiku cotton, which is the same material as the outer layer and the inner layer.

The cloth, which is the ear hook member, is cut into a string shape.
The knitting has the property of curling toward the front side of the fabric at the beginning and end of knitting, and the knitting end curls toward the back side of the fabric. Utilizing this property, when cutting the ear hook member into a string shape, the cloth edge in the longitudinal direction is cut so as to be rounded toward the center in the lateral direction.
For example, when the outer material of the ear hook member should be exposed as the appearance and design of the mask 1, the ear hook member is cut into a string shape in which the longitudinal direction of the ear hook member is parallel to the knitting end of the knitted fabric. When it is desired to give the ear hook portion 3 elasticity, since the knitting is highly elastic in the direction of the knit end and the knit end, the ear hook member has a string shape whose longitudinal direction is perpendicular to the knit end. Can be cut.
By cutting the ear hook member so that the cloth edge in the longitudinal direction is rounded toward the center in the lateral direction, the ear hook member is naturally substantially cylindrical even if the cut portion of the ear hook member is left uncut. It has a tubular shape. When the ear hook member has a tubular shape, both ends of the ear hook member in the longitudinal direction may be rounded to form a tubular shape having two tubes, as shown in FIG. 1 (b). , One end of the ear hook member in the longitudinal direction may be rounded toward the other end to form a tubular shape with one tube.

The ear hook member is passed through the tubular portions of both end portions 23, and is formed into an annular shape by connecting the ear hook member. Since the ear hook member can be freely moved within the tubular end portions 23, when it is desired to hide the knot of the ear hook member, the knot of the ear hook member is moved to the inside of the tubular shape of both end portions 23. , This can be hidden.
The length of the member of the ear hook portion 3 can be changed as appropriate. When it is desired to hide the knot of the ear hook member in the tubular portion of both end portions 23 of the mask main body 2, the knot is cut to a length hidden in the tubular portion. When the knot of the ear hook member is used as a fringe to decorate the mask 1, it can be cut to a length in consideration of the design as the fringe. Further, when the knot of the ear hook member is a fringe, further decoration may be added to the knot portion.

The ear hook portion 3 may be configured as a plurality of ear hook members. In this case, in order to reduce the burden on the wearer's ears when wearing the mask 1, the width of the ear hook member in the lateral direction is larger than that in the case where the ear hook portion 3 is composed of a single ear hook member. It is better to make it narrower. As a result, when the ear hook member has a tubular shape, it can be made into a thinner string shape. It is preferable that the ear hook portion 3 is configured so that the total thickness of the ear hook member is substantially the same depending on whether the ear hook member 3 is composed of a single ear hook member or a plurality of ear hook members.

By leaving the cloth, which is a member constituting the ear hook portion 3, of the ear hook portion 3 uncut, the ear hook portion 3 is softer to the touch than the case where the ear hook member has seams due to sewing or the like, and its shape is Since it has a substantially cylindrical shape, it is possible to reduce the pain and discomfort that occur in the ear when the ear hook member is hung on the ear. Further, by leaving the member of the ear hook portion 3 uncut, the knot of the ear hook portion 3 can be easily untied when adjusting the length of the ear hook portion 3. The knot of the ear loss portion 3 may be difficult to untie due to shrinkage of the member after washing, etc., but by leaving the member uncut, compared to the case of sewing or the like. Since there is a lot of space in the knot, the knot can be untied more easily.

Next, the wearing operation of the mask 1 of the embodiment configured as described above will be described.
The wearer applies the mask body 2 which has been expanded and expanded into a three-dimensional shape to the upper end P1 of the central curve CL to his / her nose root, the lower end P2 of the central curve CL to his / her lower jaw, and the nose and mouth to the mask body. Cover with 2.
Next, the wearer puts the ear hook portion 3 on the ear, adjusts the length of the ear hook member so that the mask body 2 is arranged at an appropriate position on the wearer's face, and ties the mask body 2. Here, the "appropriate position" means that the wearer's nose and mouth are covered with the mask body 2, the upper edge 21 is from the base of the nose to below the eyes, the contact portion 24 is the cheek, and the lower edge 22 is the lower jaw. The position where the mask body 2 is arranged on the wearer's face so that it fits tightly in the vicinity.

The wearer ties one of the left and right ear hook members in advance to form a ring, hangs this on the corresponding ear, and adjusts and ties the length of the untied ear hook member. Later, the length of the pre-tied ear hook member may be adjusted again. In this embodiment, the ear hook portion 3 is formed into an annular shape by tying the ear hook member, and the length thereof is also adjusted. However, instead of tying, a member that adjusts the length of the ear hook member may be used. good.
Subsequently, the wearer deforms the shape-retaining member 211 from its nose base so as to follow the eye.
As described above, the mask 1 is arranged at an appropriate position on the wearer's face, so that no gap is formed between the mask 1 and the wearer's face, and the adhesion of the mask 1 can be improved.

As described above, according to the mask of the present embodiment, the virtual straight line VL is divided into three with reference to the morphological face height, the nose height, and the average value in the philtrum, and an arc corresponding to each is formed to form the arc. Since the central curve CL is formed by smoothly connecting the masks, the wearer can easily breathe through the nose without feeling stuffy when wearing the mask 1, and the mouth can be opened and closed during conversation. It is easy and you can avoid feeling stuffy during conversation.
Further, by configuring the mask 1 so that both ends 23 are tilted, one of the upper end and the lower end of both ends 23 does not rise, and the mask body 2 and the wearer's cheeks are more fitted. Since the contact portion 24 is composed of an outer layer and an inner layer without having an intermediate layer, the mask 1 can be more fitted to the wearer's face without any gaps, and the mask 1 cannot be worn. Pleasure can be reduced.

Since the cloth, which is a member constituting the ear hook portion 3, is left uncut, it is possible to reduce the pain and discomfort that occurs in the ear when the ear hook member is hung on the ear, and the knot can be tied. Since it can be easily solved, the length of the ear hook portion 3 can be easily adjusted.
Since the intermediate layer is adhered to the inner layer, when the mask body 2 takes a three-dimensional shape, the inner layer does not separate from the intermediate layer which is the core, and it is difficult to breathe and talk when wearing the mask 1. Discomfort can be reduced.
Since the shape-retaining member 211 ensures that the upper edge 21 of the mask body 2 is aligned with the ridgeline from the wearer's nose root to the lower part of the inner eye angle and under the eyes, the mask 1 extends from the nose root to below the eyes. It can be more fitted to the wearer's face, the airtightness of the separation space S can be further enhanced, and the wearer's own exhaled breath can be more prevented from escaping from the portion.

Although the embodiment of the mask of the present invention has been described above, the present invention is not limited to the described embodiment, and various modifications can be made within the range described in each claim.
As the mask 1, it is possible to create a mask that is enlarged or reduced in a similar shape based on the virtual straight line VL, and it is possible to create a mask of various sizes according to the size of the wearer's face.

1 Mask 2 Mask body 21 Upper edge 211 Shape-retaining member 22 Lower edge 23 Both ends 24 Contact 3 Ear hook S Separation space CL Central curve VL Virtual straight line

Claims (5)

The body that covers at least the nostrils and mouth of the wearer,
A mask comprising a pair of ear hooks that are hung on the wearer's ears and for arranging the main body on the wearer's face.
In the mask, the direction connecting the wearer's nose and mouth in a straight line is defined as the vertical direction, the direction connecting the left and right ears in a straight line is defined as the width direction, and the direction from the mouth to the nose is defined as the upper side and the nose. When the direction from to the mouth is defined as the lower side,
The main body portion has a central curve located at the center in the width direction, both end portions which are ends in the width direction, and upper end portions which are upper ends in the vertical direction, and becomes flat when folded from the central curve. It is expanded to have a three-dimensional shape, and is composed of an inner layer provided on the side that comes into contact with the wearer's face when worn and an outer layer provided on the side that comes into contact with the outside air, and is composed of the inner layer and the outer layer. With an intermediate layer between and
The intermediate layer is formed by laminating one non-woven fabric or two or three non-woven fabrics, is shorter than the main body in the width direction, and is provided on a portion excluding both ends.
The main body is a virtual straight line formed by connecting the upper and lower ends of the central curve, and a virtual straight line.
A first straight line orthogonal to the virtual straight line at a position 0.40 to 0.45 times the length of the virtual straight line from the upper end of the virtual straight line.
It has a second straight line orthogonal to the virtual straight line at a position 0.06 to 0.16 times the length of the virtual straight line from the first straight line.
The central curve is a convex substantially arc shape formed by smoothly connecting three arcs in the planar side view.
The three arcs are arranged in order from the upper end to the lower end of the central curve.
The first arc is an arc whose chord is a straight line connecting the upper end of the virtual straight line and the first straight line, and the angle formed between the chord and the virtual straight line is configured to be 25 ° ≤ 35 °. The arc has a center point on a straight line that vertically divides the chord, which is drawn toward the virtual straight line side from the chord, with both ends of the chord as a start point and an end point, respectively.
The second arc is an arc whose chord is a straight line connecting the contact point between the chord of the first arc and the first straight line and the second straight line, and the arc is the arc from the chord. The chord drawn to the virtual straight line side has a center point on a straight line that vertically divides the chord into two equal parts, and both ends of the chord are formed as start points and end points, respectively, so that the arc protrudes most on the central curve. Configured,
The third arc is composed of an arc whose chord is a straight line connecting the contact point between the chord of the second arc and the second straight line and the lower end of the virtual straight line, and the arc is the virtual arc from the chord. It has a center point on a straight line that vertically divides the chord drawn to the straight line side into two equal parts, and is formed with both ends of the chord as start points and end points, respectively.
At both ends in the planar side view,
The upper ends of the both ends are arranged above the position where the virtual straight line is divided into two equal parts.
The lower ends of the both ends are arranged below the position where the virtual straight line is divided into two equal parts.
The angle formed between the virtual straight line and the straight line connecting the lower end of the virtual straight line and the lower ends at both ends thereof is an acute angle.
The length of a straight line orthogonal to the virtual straight line and connecting the virtual straight line with the upper ends of both ends is
A mask characterized in that it is orthogonal to the virtual straight line and is shorter than the length of a straight line connecting the virtual straight line and the lower ends of both ends. The first aspect of the present invention, wherein the ear hook portion has a string-shaped member, and the string-shaped member is a cloth that has not been cut and is made of a knitted fabric. mask of. The mask according to claim 1 or 2, wherein the intermediate layer is adhered to the inner layer. Claims 1 to 3 are characterized in that a linear or strip-shaped shape-retaining member having plasticity that can be deformed from the base of the nose of the wearer is arranged on the upper end portion. The mask described in. The mask according to claim 1 to 4, wherein the intermediate layer contains a non-woven fabric having an antiviral function.

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