JP2023056505A - mask - Google Patents

Abstract

To provide a mask that can solve problems raised by conventional masks, especially problems during eating and drinking.SOLUTION: Provided is a mask having a mask body 10 and mounting means 15 for mounting the mask body 10 on the face of a user, including: the mask body 10 vertically classified into a first portion 10a to be brought into close contact with the face of the user and a second portion 10b; a first core material 11a to which the first portion 10a is attached, the first core material being adjustable in shape in conformity with the face of the user; and a rotating part 12 including a rotating member provided on opposite ends of the first core material 11a and configured to fold and open/close the first portion 10a by rotating the first core material 11a, and a tab member 12a provided for the rotating member and intended to rotate the first core material 11a by hand. At least the first portion 10a is configured to be foldable and openable/closable by a rotating operation of the first core material 11a from a closed position in close contact with the face of the user to a predetermined open position.SELECTED DRAWING: Figure 2

Description

The present invention relates to masks such as sanitary masks, medical masks and eye masks that cover the eyes, nose or mouth of the user.

Wearing a sanitary mask is said to be effective as a preventive measure against infections such as influenza virus and new coronavirus. Sanitary masks and medical masks (collectively referred to as "masks") are generally cloth or paper masks that cover the mouth and nose with ear straps attached to both ends. In order to reduce the possibility of infection, people are reminded not to touch the mask body with their hands as much as possible.
Wearing a mask is also encouraged when eating and drinking, but since it is not possible to eat and drink with the mask on, the mask is removed or put down only when bringing food to the mouth. However, at this time, since touching the mask itself increases the risk of infection, the mask's ear straps are removed from the ears with one hand, and after carrying food and drink to the mouth, the ear straps are put back on the ears. is encouraged.
However, since it is difficult to actually perform such an operation, various masks have been proposed that enable eating and drinking by simply removing the covering around the mouth without touching the mask body. (See Patent Documents 1 and 2, for example).
Such masks can be classified into two types, one of which is, for example, the mask described in Patent Document 1, in which a part of the mask body can be opened and closed so that the mouth of the mask body can be opened and closed during eating and drinking. is to open. The other one, like the mask described in Patent Document 2 and Non-Patent Document 1, slides or rotates the mask body or part thereof up and down to remove the covering around the mouth when eating and drinking. be.

Utility Model Registration No. 3231062 Japanese Patent No. 5421507

(Rakuten Ichiba) Made in Japan Mask Meal Frame Opening and Closing Dinner Mask Splash Prevention Easy to Breathe Dinner For Dining Opening and Closing Type Mask Dinner Eatable Washable Cloth Sports Mask: Hatter Bowsial (https://item.rakuten.co .jp/fis-coltd/233n111/) See description)

However, with the mask described in Patent Document 1, there is a high possibility that the hand will come into contact with the mask body, and the operation of opening and closing the mouth part of the mask body by removing the hook-and-loop fastener every time food is brought to the mouth is difficult. This is troublesome and has the disadvantage that when the hook-and-loop fastener is removed, the mask body is temporarily pulled away from the face. In addition, there is a problem that food and drink touch the mask body and easily stain the mask body when carrying food and drink to the mouth.
As with the masks described in Patent Document 2 and Non-Patent Document 2, a part of the mask body can be opened and closed vertically. Although the possibility of contact between objects and the mask body is reduced, when part of the mask body is rotated up and down, part of the mask body must be lifted or pulled down by hand. There is a disadvantage that the chances of contact with other people increase and the effect of reducing the risk of infection decreases.
Furthermore, with the above-mentioned conventional mask, there is a risk that food and drink will come into contact with the mask body and stain the mask when eating and drinking. There was a problem that the
SUMMARY OF THE INVENTION An object of the present invention is to provide a mask capable of solving the problems of these conventional masks.

In order to solve the above problems, the mask according to claim 1 is a mask having a mask body that is in close contact with the user's face and a mounting means that mounts the mask body on the user's face, and is divided into upper and lower parts. The mask body having a first portion and a second portion that can be opened and closed relatively, and a first core member to which the first portion is attached and formed according to the shape of the user's face. and rotating members provided at both ends of the first core material for folding and opening the first portion by rotating the first core material; a rotating portion including a pick member for manually rotating the one core member, wherein the first portion moves from a closed position in close contact with the user's face to a predetermined open position. , the first core member can be folded and opened by rotating the first core member.

According to this configuration, the mask body, which is in close contact with the user's face, is divided into upper and lower parts, the first part and the second part. The first portion may be the upper portion or the lower portion of the mask body. The first portion is made of a flexible material such as cloth such as non-woven fabric or Japanese paper, and can be folded and opened. By gripping and rotating the rotating member downward, the first portion is folded downward together with the first core material (since the top of the mask body opens, this is sometimes referred to as "upward opening"), For example, when eating and drinking, the covering around the mouth is released to make it possible to eat and drink. Further, when the first portion is arranged at the lower portion of the mask body, the first portion is folded upward together with the first core material by grasping the knob member and rotating the rotating member upward. For example, when eating or drinking, the covering around the mouth is released to make it possible to eat and drink.
Therefore, for example, when it is necessary to uncover the mask body around the mouth when eating or drinking, the first portion can be folded upward or downward to open the mouth without touching the mask body. can be uncovered. In addition, it is possible to restore the original state in which the mouth and nose are covered simply by pinching the knob portion and rotating the rotating member in the opposite direction without touching the mask body.

As described in claim 2, the second portion may also be provided with a second core material adapted to the shape of the user's face. In this case, as described in claim 3, both ends of the second core material are attached to the rotating part, and the second part can be moved from the closed position in close contact with the user's face. It may be configured such that it can be folded and opened up to a predetermined open position by rotating the second core member.
With this configuration, both the upper and lower first portions and the second portions constituting the mask body can be folded and opened and closed.
The first core material or the second core material may be made of soft metal such as aluminum wire or copper wire, resin, or the like so that the user can adjust the shape of the face by himself/herself. Alternatively, it may be formed of a metal wire or a resin wire preformed in a shape conforming to the user's face.

As described in claim 4, there may be provided restricting means for restricting rotation of the rotating member at the closed position or the open position. By providing such a restricting means at the closed position, it is possible to fix the rotating member at the closed position and maintain close contact between the face and the mask body when the mask is in use. In addition, by being provided at the open position, the swinging of the first portion or the second portion that can be folded and opened during eating and drinking is restricted, and contact between the food and the first portion or the second portion is prevented. can be prevented.
The rotation of the rotating member may be restricted by the restricting means at an intermediate position between the closed position and the open position.
By configuring in this way, for example, when drinking a drink with a straw or the like, the first portion or the second portion that can be folded and opened is slightly opened (that is, rotated to the halfway position). state), a drink is drunk with a straw or the like, and when eating, the rotating member can be rotated to the open position so that the mask body can be opened wide before eating.

Further, the restricting means is provided between the rotating member and a base that rotatably supports the rotating member, and the restricting means is provided between the rotating member and a base that rotatably supports the rotating member. Concave and convex portions for restricting the rotation of the moving member or magnetized members for restricting the rotation of the rotating member by being magnetically attached to each other can be used.
As described in claim 7, if the mask body is used for both the upper and lower sides so that it can be used as the mask body even if it is turned upside down, the first part and the second part can be formed by turning upside down. Even if the mask body is formed so that only the first portion can be folded and opened, it can be used both upwardly and downwardly.

As a specific configuration of the rotating portion, for example, as described in claim 8, bases provided on the mounting means on the right and left sides of the user's face and shafts supported by the bases are provided. At least one of the base and the shaft is engaged with each other so as to be relatively rotatable so that at least one of them is configured as the rotating member, and the knob member is provided on at least one of the left and right rotating members. , the left and right shafts or the bases may be connected by the first core material or the second core material.
In this case, it is also possible to use the rotating member as a restricting means. For example, as described in claim 9, the regulating means has a shaft that supports the left and right rotating members, and an elastic member that supports the left and right shafts, and the elastic member has a pressing force. The postures of the left and right shafts can be changed between a parallel state and a non-parallel state by elastic deformation due to the application, and when the left and right shafts are in the parallel state, the restriction on rotation of the rotating member can be released. As recited in claim 10, the elastic member may be the first core material or the second core material.
The first core material and the second core material can have various shapes according to the shape of the user's face and mouth. At least one of the one core member and the second core member may be formed in a trapezoidal shape. In this case, as described in claim 12, the upper base of the trapezoid is preferably an auxiliary sheet mounting portion for mounting a rectangular auxiliary sheet.
In this case, as described in claim 13, the first portion or the second portion is placed at the open position or the middle position on the upper bottom surface of the trapezoidal first portion or the second portion. It is preferable that a notch through which the auxiliary sheet is inserted is formed when the mask is rotated so that the auxiliary sheet is inserted through the notch from the user's mouth side to cover the mask body. As the auxiliary sheet, a general paper napkin placed on a table in a restaurant can be used as it is.

Preferred embodiments of the present invention are described below.
FIG. 1 shows one embodiment of the mask of the present invention, (a) is a front view of the user's face showing the state of wearing the mask, (b) is a side view of the same, and (c) is when eating and drinking. 2 is a front view of a state in which the upper part of the main body of the mask is lowered, and (d) is a side view of the same.
The mask 1 of the present invention is formed of a soft material such as cloth such as non-woven fabric or Japanese paper, and includes a mask body 10 that is in close contact with the user's face, and ear hooks as wearing means connected to the left and right ends of the mask body 10. It has a cord 15 and a rotating portion 12 provided between the mask body 10 and the ear hook cord 15 .

The mask body 10 is divided into upper and lower parts, an upper body part 10a as a first member that covers the mouth and nose of the user, and a lower body part 10b as a second member that hangs over the chin below the user's mouth. Consists of In this embodiment, the main body upper part 10a of the main body upper part 10a and the main body lower part 10b that are divided is turned up and down around the turning parts 12 provided at both ends of the mask main body 10, and opened and closed while being folded. part. Then, by rotating the main body upper part 10a downward with the rotating part 12 as a fulcrum, as shown in FIGS. become.

2A and 2B are diagrams for explaining the configuration of the mask 1. FIG. 2A is a front view showing the state in which the mask 1 is spread flat, and FIG. (c) is a partially enlarged cross-sectional view showing a modification of the rotating portion 12. FIG.
For the convenience of explaining the configuration of the mask 1 of the present invention, FIG. 2 shows the mask 1 spread flat. It is curved together with a first core material 11a and a second core material 11b, which will be described later, and worn on the face.
The mask body 10 is made of cloth (for example, non-woven fabric), woven fabric, Japanese paper, etc., which are generally used as materials for the mask body 10, and is formed so that it can be tightly covered around the mouth and nose of the user. be done.

An arch-shaped first core material 11a is inserted or sewn into the upper portion of the mask body 10. As shown in FIG. The portion into which the first core material 11a is inserted or sewn forms the main upper portion 10a of the mask main body 10. As shown in FIG.
The first core material 11a deforms the mask body 10 along the shape of the user's mouth and nose, and deforms so that the mask body 10 can be brought into close contact with the user's mouth and nose. It is formed from possible metal wires, resin wires, or composites thereof. By forming the first core member 11a from a soft metal wire such as an aluminum wire or a copper wire, the user can adjust the mask body 10 by himself to cover the mouth and nose.

A second arch-shaped core material 11b is inserted or sewn into the lower part of the mask body 10 . The portion into which the second core material 11b is inserted or sewn forms the main body lower portion 10b of the mask main body 10. As shown in FIG. As with the first core material 11a, the second core material 11b is also made of a deformable metal wire or resin wire so that the mask body 10 can be brought into close contact with the mouth and nose of the user. . The first core material 11a and the second core material 11b may be made of the same material or different materials.
In the illustrated example, the first core member 11a and the second core member 11b are formed in a trapezoidal arch shape. , other shapes such as an arc shape, a triangular shape, and a polygonal shape.

Disk-shaped bases 12b are attached to both ends of the second core member 11b. The second core member 11b and the base 12b may be integrally formed of the same material, or may be formed separately of the same material or different materials and connected by adhesion, fusion, welding, or the like. may be formed. For example, if the tip of the second core member 11b is inserted into a hole formed in the side peripheral surface of the base 12b to connect the two, the second core member 11b having a length and material different from those of the base 12b can be used. is easier to replace.
Ear strap attachment portions 12c for attaching ear straps 15 are protruded from the outer ends of the left and right bases 12b. In this embodiment, ear hooking strap attachment portions 12c are also formed at two corners of the second core member 11b, and the ear hooking strap attachment portions 12c formed on the base 12b and the second core member 11b are connected to each other. Each end of the ear strap 15 is connected to the ear strap attaching portion 12c.

At both ends of the first core member 11a, protruding knobs 12a, which are knob members, are provided.
In this embodiment, the knob 12a constitutes a knob member and a rotating member. When the mask main body 10 is curved and worn on the user's face, the main body upper portion 10a can be rotated up and down together with the first core member 11a using the shaft 13 as a rotation axis.
In this embodiment, the second core material 11b can be rotated with respect to the first core material 11a by using the ear hooking strap attaching portion 12c protruding from the outer periphery of the base 12b as a "knob". be possible. In this case, the base 12b also constitutes a rotating member.
The first core member 11a and the knob 12a may be integrally formed of the same material, or may be separately formed of the same material or different materials and connected by adhesion, fusion, welding, or the like. may be formed. For example, if the tip of the first core member 11a is inserted into a hole formed in the side peripheral surface of the knob 12a to connect them, the first core member 11a having a length and material different from those of the knob 12a can be inserted. is easier to replace.
By making the first core member 11a and the second core member 11b replaceable with respect to the rotating portion 12, various masks 1 having different sizes and hardness can be obtained. Also, the first core material 11 a and the second core material 11 b are preferably removable from the mask body 10 . By doing so, it is easy to remove the mask main body 10 from the rotating part 12 and remove the first core material 11a and the second core material 11b for washing, or to replace the mask main body 10 with a different material. become.

Between the knob 12a and the base 12b, it is preferable to provide a stopper as a restricting means for restricting rotation of the knob 12a at a predetermined rotation angle position. As the stopper, either one of the knob 12a and the base 12b may be provided with a convex portion and the other with a concave portion. As shown in FIG. 2, a concave portion 14b is formed in the base 12b, and a convex portion 14a that engages with the concave portion 14b is formed on the lower surface of the knob 12a. It restricts the rotation of 10a. Therefore, when eating and drinking with the main body upper portion 10a lowered, the main body upper portion 10a does not swing according to the movement of the user's face, and the inconvenience of the main body upper portion 10a coming into contact with food and drink during eating and drinking is eliminated. can be prevented.
Such a stopper may also be provided above the base 12b so as to regulate the position when the main body upper portion 10a is lifted.
The knob 12a, the base 12b, and the shaft 13 together with the first core member 11a constitute a rotating portion 12 for opening and closing the upper portion 10a of the main body in the folding direction.

A modification of the rotating portion 12 is shown in FIG. 2(c). The same reference numerals are given to the same members and the same parts as in the previous embodiment, and the description of the previous embodiment is used.
In the previous embodiment, the knob 12a is rotatably supported with respect to the bail 12b by the shaft 13, which is separate from the knob 12a and the base 12b. A split shaft 13' having claws 13'a is integrally formed on the lower surface of the knob 12a, and a stepped hole 12d into which the shaft 13' can be inserted is formed through the base 12b. It is When the shaft 13' is pushed into the stepped hole 12d, the pawl 13'a moves radially inward and climbs over the stepped portion at the entrance of the stepped hole 12d. The shaft 13' is fitted in the stepped hole 12 by engagement. As a result, the shaft 13' and the knob 12a are rotatably supported by the base 12b, and the engagement between the stepped portion and the claw 13'a prevents the knob 12a from easily coming off the base 12b.

3A and 3B are diagrams for explaining the operation of the mask 1 of this embodiment. FIG. 3A is a partially enlarged side view of the rotating portion 12 showing the normal wearing of the mask 1, and FIG. It is a partially enlarged side view of the rotating part 12 when the upper part is lowered.
When wearing the mask 1, the ear straps 15 are hung on the left and right ears in the same way as a normal mask, and the mask main body 10 is used while deforming the first core material 11a and the second core material 11b. Adjust it so that it fits tightly to the face around the person's nose and mouth.
When eating and drinking, the knob 12a of the rotating portion 12 is picked and the main body upper portion 10a is rotated downward together with the first core member 11a. At this time, the upper part 10a of the main body 10a made of flexible cloth is deformed so as to be folded by the turning motion of the first core member 11a to open the mouth of the user.
Rotational movement of the first core member 11a is restricted by a stopper (in the illustrated example, a convex portion 14a formed on the lower surface of the knob 12a and a concave portion 14b formed on the base 12b), which is a restricting means. Fixed at the lower limit position. As a result, the upper part 10a of the main body 10a shifts from the state of (a) to the state of (b), and the mouth of the user is opened to enable eating and drinking. After eating and drinking, the knob 12a is picked and the main body upper portion 10a is rotated upward together with the first core member 11a. As a result, the main body upper portion 10a returns to the state of (a).
If the ear strap attaching portion 12c is used as a "knob", the lower body portion 10b is opened and rotated downward by rotating the lower body portion 10b together with the second core member 11b. to return to the closed state.

FIG. 4 shows another embodiment of the mask of the present invention, (a) is a plan view when a normal mask body is attached, (b) is a plan view when the upper body 10a is rotated downward, ( c) is a plan view when the main body upper portion 10a is rotated downward. The same members and portions as those of the previous embodiment explained with reference to FIGS.
The rotating portion 22 has a base 22b provided at both ends of the second core member 21b, a projecting shaft 23 formed on the base 22b, and a shaft hole 22d into which the shaft 23 is fitted. and bearing portions 22a formed at both ends of the first core member 21a. At least one of the bearing portions 22a of the left and right rotating portions 20 may be formed with a portion such as a lever or a knob that can be gripped by hand. In the illustrated example, a brim 22e projecting radially outward is formed on the top of the bearing portion 22a of the right rotating portion 20. As shown in FIG.
The shaft hole 22d is formed in a penetrating shape so that the upper end of the shaft 23 protrudes slightly from the shaft hole 22d. Further, the inner peripheral surface of the shaft hole 22d of the bearing portion 22a and the shaft 23 are preferably tapered in order to maximize the contact area. In this embodiment, the rotation of the second core member 21b is restricted by the frictional force between the shaft 23 and the inner peripheral surface of the shaft hole 22d of the bearing portion 22a.

In addition, the first core material 21a and the second core material 21b in this embodiment are basically the same as the first core material 11a and the second core material 11b in the previous embodiment, and these core materials The mask main body 10, the upper main body 10a, and the lower main body 10b supported by 11a and 11b are also the same as in the previous embodiment.
In this embodiment, as described above, the frictional force between the shaft 23 and the inner peripheral surface of the shaft hole 22d of the bearing portion 22a regulates the rotation of the second core member 21b. In order to generate this, the first core material 21a that always exerts an elastic force to the outside (outside in the horizontal direction of the paper surface in the figure) is used, or the second core material 21b is always inward (in the figure). in the left-right direction inside of the paper surface) is used.

By using such a first core member 21a or second core member 21b, the axis C of the shaft 23 of the left and right rotating parts 22 is slightly inclined from parallel as shown in FIG. The shaft 23 is pressed against the inner peripheral surface of the shaft hole 22d of the bearing portion 22a, and the frictional force restricts the rotation of the second core member 21b.
When eating and drinking, as shown in FIG. 4B, the top of the shaft 23 exposed from the shaft holes 22d of the left and right bearings 22a is pushed in the arrow P direction with a finger. As a result, the axes C of the left and right shafts 23 become parallel, the frictional force between the shafts 23 and the inner peripheral surface of the shaft hole 22d is reduced, and the first core member 21a and the main body upper portion 10a (see FIG. 2) are displaced. It rotates downward by its own weight. By providing the same restricting means (magnets and unevenness 14a, 14b) as in the previous embodiment, the second core member 21b and the main body upper portion 10a are restricted from rotating when rotated by a predetermined angle.
After eating and drinking, the second core member 21b and the upper body portion 10 can be rotated upward by grasping the flange 22e formed on the bearing portion 22a.
In this embodiment as well, the lower body portion 10b can be rotated upward together with the second core member 11b by using the ear hooking strap attachment portion 12c as a "knob", thereby opening the lower body portion 10b. becomes. Then, by rotating the main body lower portion 10b downward together with the second core member 11b from the open state, the closed state is restored.

5A and 5B are diagrams showing still another embodiment of the mask of the present invention, in which (a) is a front view showing a state in which the mask is spread flat, and (b) is a state in which a sheet such as a napkin is installed. 1 is a plan view of a mask in time. FIG. In the description of FIG. 5, the same reference numerals are given to the same parts and the same members as in the previous embodiment, and the description of the previous embodiment is used.
In the mask body 10' of this embodiment, the main body upper part 10a has a notch along the upper base side of the first core material 11a, through which an auxiliary sheet 3 such as a general napkin that is placed in a restaurant can be inserted. 10d is formed through. When the sheet 3 is inserted through the notch 10d and the upper part 10a of the main body is rotated downward when eating or drinking, the mask body 10' can be covered from the user's mouth through the notch 10d. It is possible to avoid the inconvenience that food and drink come into contact with the mask body 10' when eating and drinking.

Although preferred embodiments of the invention have been described, the invention is not limited to the above embodiments.
For example, in the above description, the stoppers such as the magnets and the unevenness 14a and 14b are used to determine the lower limit position when the upper body portion 10a is rotated downward. A stopper such as a magnet or unevenness 14a, 14b may be provided. When drinking a drink with a straw or the like, it is sufficient to open the mouth part a little. By doing so, the opening around the mouth can be made as small as possible, and the risk of infection can be reduced.
Further, as long as the upper body 10a or the lower body 10b can be maintained in an open or closed state, the restricting means is not limited to the above-described one, and another form may be employed. For example, in the embodiment of FIG. 1, the open/closed state may be maintained only by the contact frictional force between the knob 12a and the base 12b.

Further, in the above description, eating and drinking is enabled by rotating the upper body portion 10a downward, but it may be configured so that eating and drinking is enabled by rotating the lower body portion 10b upward. Alternatively, both the upper body portion 10a and the lower body portion 10b may be rotatable, and depending on the situation, either one may be rotated to bring the user into a state in which the user can eat or drink.
Furthermore, in the above description, the ear straps 15 are used as the attachment means, but other attachment means may be used as long as the mask bodies 10 and 20 can be attached to the user's face, such as eyeglass temples. good.
Further, the second member (main body lower portion 10b) which is not opened and closed by folding may be made of a soft material such as non-woven fabric or Japanese paper, but may be made of a resin cover.

The mask of the present invention is not limited to the sanitary mask described above, but can also be applied to medical masks such as surgical masks used by doctors and nurses during surgery. It can also be applied to an eye mask that is worn occasionally.

1 shows an embodiment of the mask of the present invention, in which (a) is a front view of a user's face showing a state in which the mask is worn, (b) is a side view of the same, and (c) is the main body of the mask when eating and drinking. It is a front view in a state where the upper part is lowered, and (d) is a side view of the same. 1A is a front view showing a state in which the mask 1 is spread flatly; FIG. FIG. 5 is a partially enlarged cross-sectional view showing a modification of the rotating portion 12; 1A is a partially enlarged side view of a rotating portion 12 showing a state in which the mask 1 is normally worn, and FIG. It is a partially enlarged side view of the rotating portion 12 when. According to another embodiment of the mask of the present invention, (a) is a plan view when a normal mask body is attached, (b) is a plan view when the main body upper part 10a is rotated downward, and (c) is the main body It is a top view when rotating the upper part 10a downward. Fig. 10 is a diagram showing still another embodiment of the mask of the present invention, (a) is a front view showing the state in which the mask is spread flat, and (b) is a state in which a sheet such as a napkin is worn. It is a top view.

1 Masks 10, 10', 20 Mask main bodies 10a, 20a Upper main bodies 10b, 20b Lower main bodies 10d Cuts 11a, 21a First cores 11b, 21b Second cores 12 Rotating parts 12a Knobs 12b Bases 12c Ear straps Mounting part (applied part)
12d stepped hole 13 shaft 13'a claw 14a convex portion 14b concave portion 15 ear strap (wearing means)
22 Rotating portion 22a Bearing portion 22b Base 22c Ear strap mounting portion (mounting portion)
22d shaft hole 22e collar 3 auxiliary sheet (napkin)

Claims (13)

A mask having a mask body that is in close contact with the user's face and a wearing means that wears the mask body on the user's face,
the mask body having a first portion and a second portion which are divided into upper and lower portions and are relatively foldable and openable;
a first core material to which the first portion is attached and formed according to the shape of the user's face;
a rotating member provided at both ends of the first core material and configured to fold and open the first portion by rotating the first core material; a rotating portion including a knob member for manually rotating the core material;
has
The first portion can be folded and opened by rotating the first core material from a closed position in close contact with the user's face to a predetermined open position;
A mask characterized by 2. The mask according to claim 1, wherein the second portion is attached with a second core material formed to match the shape of the user's face. Both ends of the second core material are attached to the rotating member, and the second part moves the second core material from a closed position in close contact with the user's face to a predetermined open position. 3. The mask according to claim 2, wherein the mask can be opened and closed by folding. 4. The mask according to any one of claims 1 to 3, further comprising restricting means for restricting the rotating motion of the rotating member at the closed position or the open position. 5. The mask according to claim 4, wherein the restricting means restricts rotation of the rotating member at an intermediate position between the closed position and the open position. The restricting means is provided between the rotating member and a base that rotatably supports the rotating member, and is an uneven portion that restricts the rotation of the rotating member by being engaged with each other, or is magnetically connected to each other. 5. The mask according to claim 4, wherein the mask is a magnetically-attached member that restricts rotation of the rotating member by being attached thereto. 4. The mask body according to any one of claims 1 to 3, wherein the mask body is formed so as to be used for both top and bottom, and the top and bottom of the first portion and the second portion are switched by inverting the top and bottom of the mask body. The mask described in Crab. The rotating portion has a base provided on the mounting means on both left and right sides of the user's face, and a shaft supported by the base, and the base and the shaft rotate relatively. At least one of the left and right rotating members is configured as the rotating member by being freely engaged, and the knob member is provided on at least one of the left and right rotating members. 4. The mask according to claim 1, wherein said left and right shafts or said bases are connected. The regulating means has a shaft that supports the left and right rotating members, and an elastic member that supports the left and right shafts. 9. The mask according to claim 8, wherein the posture is changed between a parallel state and a non-parallel state, and the rotation regulation of the rotating member is released in the parallel state. 10. The mask according to claim 9, wherein said elastic member is at least one of said first core material and said second core material. 4. The mask according to claim 1, wherein at least one of said first core member and said second core member is trapezoidal. 12. The mask according to claim 11, wherein the upper base of said trapezoid is formed as an auxiliary sheet mounting portion for mounting a rectangular auxiliary sheet. The auxiliary sheet is provided on the upper bottom surface of the trapezoidal first portion or the second portion when the first portion or the second portion is rotated to the open position or the intermediate position. 13. The mask according to claim 12, wherein a cut is formed through which the auxiliary sheet is inserted, and the auxiliary sheet is inserted through the cut from the user's mouth side to cover the mask body.

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